rename packages/ to recipes/ per earlier agreement

See links below for more details: http://thread.gmane.org/gmane.comp.handhelds.openembedded/21326 http://thread.gmane.org/gmane.comp.handhelds.openembedded/21816 Signed-off-by: Denys Dmytriyenko <denis@denix.org> Acked-by: Mike Westerhof <mwester@dls.net> Acked-by: Philip Balister <philip@balister.org> Acked-by: Khem Raj <raj.khem@gmail.com> Acked-by: Marcin Juszkiewicz <hrw@openembedded.org> Acked-by: Koen Kooi <koen@openembedded.org> Acked-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
author: Denys Dmytriyenko <denis@denix.org> 2009-03-17 14:32:59 -0400
committer: Denys Dmytriyenko <denis@denix.org> 2009-03-17 14:32:59 -0400
commit: 709c4d66e0b107ca606941b988bad717c0b45d9b (patch)
tree: 37ee08b1eb308f3b2b6426d5793545c38396b838 /recipes/linux/files
parent: fa6cd5a3b993f16c27de4ff82b42684516d433ba (diff)
18 files changed, 74753 insertions, 0 deletions
diff --git a/recipes/linux/files/ipaq-hal.init b/recipes/linux/files/ipaq-hal.init
new file mode 100644
index 0000000000..4efb52ec97
--- /dev/null
+++ b/recipes/linux/files/ipaq-hal.init
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# make sure update-modules has been run
+# since the calls below depend on aliases...
+if [ ! -f /etc/modules.conf ]; then 
+  update-modules || true
+fi
+
+modprobe ipaq_hal || exit 0
+
+if [ -d /proc/hal ]; then
+  model=`cat /proc/hal/model`
+  modprobe ipaq_hal_$model
+fi
diff --git a/recipes/linux/files/ir240_sys_max_tx-2.diff b/recipes/linux/files/ir240_sys_max_tx-2.diff
new file mode 100644
index 0000000000..5f1307d7dc
--- /dev/null
+++ b/recipes/linux/files/ir240_sys_max_tx-2.diff
@@ -0,0 +1,110 @@
+--- linux/net/irda/irsysctl.c.orig	2003-05-13 11:20:16.000000000 +0200
++++ linux/net/irda/irsysctl.c	2005-01-22 18:39:40.496001712 +0100
+@@ -40,7 +40,8 @@
+ 
+ enum { DISCOVERY=1, DEVNAME, DEBUG, FAST_POLL, DISCOVERY_SLOTS,
+        DISCOVERY_TIMEOUT, SLOT_TIMEOUT, MAX_BAUD_RATE, MIN_TX_TURN_TIME,
+-       MAX_NOREPLY_TIME, WARN_NOREPLY_TIME, LAP_KEEPALIVE_TIME, SPECIFIC_DEV };
++       MAX_TX_DATA_SIZE, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME, LAP_KEEPALIVE_TIME,
++       SPECIFIC_DEV };
+ 
+ extern int  sysctl_discovery;
+ extern int  sysctl_discovery_slots;
+@@ -51,6 +52,7 @@
+ extern char sysctl_devname[];
+ extern int  sysctl_max_baud_rate;
+ extern int  sysctl_min_tx_turn_time;
++extern int  sysctl_max_tx_data_size;
+ extern int  sysctl_max_noreply_time;
+ extern int  sysctl_warn_noreply_time;
+ extern int  sysctl_lap_keepalive_time;
+@@ -71,6 +73,8 @@
+ static int min_max_baud_rate = 2400;
+ static int max_min_tx_turn_time = 10000;	/* See qos.c - IrLAP spec */
+ static int min_min_tx_turn_time = 0;
++static int max_max_tx_data_size = 2048;		/* See qos.c - IrLAP spec */
++static int min_max_tx_data_size = 64;
+ static int max_max_noreply_time = 40;		/* See qos.c - IrLAP spec */
+ static int min_max_noreply_time = 3;
+ static int max_warn_noreply_time = 3;		/* 3s == standard */
+@@ -128,6 +132,9 @@
+ 	{ MIN_TX_TURN_TIME, "min_tx_turn_time", &sysctl_min_tx_turn_time,
+ 	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
+ 	  NULL, &min_min_tx_turn_time, &max_min_tx_turn_time },
++	{ MAX_TX_DATA_SIZE, "max_tx_data_size", &sysctl_max_tx_data_size,
++	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
++	  NULL, &min_max_tx_data_size, &max_max_tx_data_size },
+ 	{ MAX_NOREPLY_TIME, "max_noreply_time", &sysctl_max_noreply_time,
+ 	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
+ 	  NULL, &min_max_noreply_time, &max_max_noreply_time },
+--- linux/net/irda/qos.c.orig	2003-05-13 11:20:16.000000000 +0200
++++ linux/net/irda/qos.c	2005-01-22 18:36:46.759413688 +0100
+@@ -60,10 +60,26 @@
+  * Nonzero values (usec) are used as lower limit to the per-connection
+  * mtt value which was announced by the other end during negotiation.
+  * Might be helpful if the peer device provides too short mtt.
+- * Default is 10 which means using the unmodified value given by the peer
+- * except if it's 0 (0 is likely a bug in the other stack).
++ * Default is 10us which means using the unmodified value given by the
++ * peer except if it's 0 (0 is likely a bug in the other stack).
+  */
+ unsigned sysctl_min_tx_turn_time = 10;
++/*
++ * Maximum data size to be used in transmission in payload of LAP frame.
++ * There is a bit of confusion in the IrDA spec :
++ * The LAP spec defines the payload of a LAP frame (I field) to be
++ * 2048 bytes max (IrLAP 1.1, chapt 6.6.5, p40).
++ * On the other hand, the PHY mention frames of 2048 bytes max (IrPHY
++ * 1.2, chapt 5.3.2.1, p41). But, this number includes the LAP header
++ * (2 bytes), and CRC (32 bits at 4 Mb/s). So, for the I field (LAP
++ * payload), that's only 2042 bytes. Oups !
++ * I've had trouble trouble transmitting 2048 bytes frames with USB
++ * dongles and nsc-ircc at 4 Mb/s, so adjust to 2042... I don't know
++ * if this bug applies only for 2048 bytes frames or all negociated
++ * frame sizes, but all hardware seem to support "2048 bytes" frames.
++ * You can use the sysctl to play with this value anyway.
++ * Jean II */
++unsigned sysctl_max_tx_data_size = 2042;
+ 
+ /*
+  * Specific device list limits some negotiation parameters at the connection
+@@ -398,10 +414,10 @@
+ 	while ((qos->data_size.value > line_capacity) && (index > 0)) {
+ 		qos->data_size.value = data_sizes[index--];
+ 		IRDA_DEBUG(2, __FUNCTION__ 
+-			   "(), redusing data size to %d\n",
++			   "(), reducing data size to %d\n",
+ 			   qos->data_size.value);
+ 	}
+-#else /* Use method descibed in section 6.6.11 of IrLAP */
++#else /* Use method described in section 6.6.11 of IrLAP */
+ 	while (irlap_requested_line_capacity(qos) > line_capacity) {
+ 		ASSERT(index != 0, return;);
+ 
+@@ -409,18 +425,24 @@
+ 		if (qos->window_size.value > 1) {
+ 			qos->window_size.value--;
+ 			IRDA_DEBUG(2, __FUNCTION__ 
+-				   "(), redusing window size to %d\n",
++				   "(), reducing window size to %d\n",
+ 				   qos->window_size.value);
+ 		} else if (index > 1) {
+ 			qos->data_size.value = data_sizes[index--];
+ 			IRDA_DEBUG(2, __FUNCTION__ 
+-				   "(), redusing data size to %d\n",
++				   "(), reducing data size to %d\n",
+ 				   qos->data_size.value);
+ 		} else {
+ 			WARNING(__FUNCTION__ "(), nothing more we can do!\n");
+ 		}
+ 	}
+ #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */
++	/*
++	 * Fix tx data size according to user limits - Jean II
++	 */
++	if (qos->data_size.value > sysctl_max_tx_data_size)
++		/* Allow non discrete adjustement to avoid loosing capacity */
++		qos->data_size.value = sysctl_max_tx_data_size;
+ }
+ 
+ /*
diff --git a/recipes/linux/files/ir241_qos_param-2.diff b/recipes/linux/files/ir241_qos_param-2.diff
new file mode 100644
index 0000000000..dfe77c52b0
--- /dev/null
+++ b/recipes/linux/files/ir241_qos_param-2.diff
@@ -0,0 +1,164 @@
+--- linux/net/irda/qos.c.orig	2005-01-22 19:19:56.013787192 +0100
++++ linux/net/irda/qos.c	2005-01-22 19:21:13.493008560 +0100
+@@ -73,13 +73,18 @@
+  * 1.2, chapt 5.3.2.1, p41). But, this number includes the LAP header
+  * (2 bytes), and CRC (32 bits at 4 Mb/s). So, for the I field (LAP
+  * payload), that's only 2042 bytes. Oups !
+- * I've had trouble trouble transmitting 2048 bytes frames with USB
+- * dongles and nsc-ircc at 4 Mb/s, so adjust to 2042... I don't know
+- * if this bug applies only for 2048 bytes frames or all negociated
+- * frame sizes, but all hardware seem to support "2048 bytes" frames.
+- * You can use the sysctl to play with this value anyway.
++ * My nsc-ircc hardware has troubles receiving 2048 bytes frames at 4 Mb/s,
++ * so adjust to 2042... I don't know if this bug applies only for 2048
++ * bytes frames or all negociated frame sizes, but you can use the sysctl
++ * to play with this value anyway.
+  * Jean II */
+ unsigned sysctl_max_tx_data_size = 2042;
++/*
++ * Maximum transmit window, i.e. number of LAP frames between turn-around.
++ * This allow to override what the peer told us. Some peers are buggy and
++ * don't always support what they tell us.
++ * Jean II */
++unsigned sysctl_max_tx_window = 7;
+ 
+ /*
+  * Specific device list limits some negotiation parameters at the connection
+@@ -227,7 +232,19 @@
+ {
+ 	__u16 msb = 0x8000;
+ 	int index = 15;   /* Current MSB */
+-	
++
++	/* Check for buggy peers.
++	 * Note : there is a small probability that it could be us, but I
++	 * would expect driver authors to catch that pretty early and be
++	 * able to check precisely what's going on. If a end user sees this,
++	 * it's very likely the peer. - Jean II */
++	if (word == 0) {
++		WARNING("%s(), Detected buggy peer, adjust null PV to 0x1!\n",
++			 __FUNCTION__);
++		/* The only safe choice (we don't know the array size) */
++		word = 0x1;
++	}
++
+ 	while (msb) {
+ 		if (word & msb)
+ 			break;   /* Found it! */
+@@ -378,10 +395,14 @@
+ 
+ 	/*
+ 	 * Make sure the mintt is sensible.
++	 * Main culprit : Ericsson T39. - Jean II
+ 	 */
+ 	if (sysctl_min_tx_turn_time > qos->min_turn_time.value) {
+ 		int i;
+ 
++		WARNING("%s(), Detected buggy peer, adjust mtt to %dus!\n",
++			 __FUNCTION__, sysctl_min_tx_turn_time);
++
+ 		/* We don't really need bits, but easier this way */
+ 		i = value_highest_bit(sysctl_min_tx_turn_time, min_turn_times,
+ 				      8, &qos->min_turn_time.bits);
+@@ -443,6 +464,11 @@
+ 	if (qos->data_size.value > sysctl_max_tx_data_size)
+ 		/* Allow non discrete adjustement to avoid loosing capacity */
+ 		qos->data_size.value = sysctl_max_tx_data_size;
++	/*
++	 * Override Tx window if user request it. - Jean II
++	 */
++	if (qos->window_size.value > sysctl_max_tx_window)
++		qos->window_size.value = sysctl_max_tx_window;
+ }
+ 
+ /*
+--- linux/net/irda/irsysctl.c.orig	2005-01-22 19:19:56.006788256 +0100
++++ linux/net/irda/irsysctl.c	2005-01-22 19:24:31.273941288 +0100
+@@ -40,8 +40,8 @@
+ 
+ enum { DISCOVERY=1, DEVNAME, DEBUG, FAST_POLL, DISCOVERY_SLOTS,
+        DISCOVERY_TIMEOUT, SLOT_TIMEOUT, MAX_BAUD_RATE, MIN_TX_TURN_TIME,
+-       MAX_TX_DATA_SIZE, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME, LAP_KEEPALIVE_TIME,
+-       SPECIFIC_DEV };
++       MAX_TX_DATA_SIZE, MAX_TX_WINDOW, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME, 
++       LAP_KEEPALIVE_TIME, SPECIFIC_DEV };
+ 
+ extern int  sysctl_discovery;
+ extern int  sysctl_discovery_slots;
+@@ -53,6 +53,7 @@
+ extern int  sysctl_max_baud_rate;
+ extern int  sysctl_min_tx_turn_time;
+ extern int  sysctl_max_tx_data_size;
++extern int  sysctl_max_tx_window;
+ extern int  sysctl_max_noreply_time;
+ extern int  sysctl_warn_noreply_time;
+ extern int  sysctl_lap_keepalive_time;
+@@ -75,6 +76,8 @@
+ static int min_min_tx_turn_time = 0;
+ static int max_max_tx_data_size = 2048;		/* See qos.c - IrLAP spec */
+ static int min_max_tx_data_size = 64;
++static int max_max_tx_window = 7;		/* See qos.c - IrLAP spec */
++static int min_max_tx_window = 1;
+ static int max_max_noreply_time = 40;		/* See qos.c - IrLAP spec */
+ static int min_max_noreply_time = 3;
+ static int max_warn_noreply_time = 3;		/* 3s == standard */
+@@ -135,6 +138,9 @@
+ 	{ MAX_TX_DATA_SIZE, "max_tx_data_size", &sysctl_max_tx_data_size,
+ 	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
+ 	  NULL, &min_max_tx_data_size, &max_max_tx_data_size },
++	{ MAX_TX_WINDOW, "max_tx_window", &sysctl_max_tx_window,
++	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
++	  NULL, &min_max_tx_window, &max_max_tx_window },
+ 	{ MAX_NOREPLY_TIME, "max_noreply_time", &sysctl_max_noreply_time,
+ 	  sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec,
+ 	  NULL, &min_max_noreply_time, &max_max_noreply_time },
+--- linux/net/irda/parameters.c.orig	2003-05-13 11:20:16.000000000 +0200
++++ linux/net/irda/parameters.c	2005-01-22 19:21:13.527003392 +0100
+@@ -204,11 +204,13 @@
+ {
+ 	irda_param_t p;
+ 	int n = 0;
++	int extract_len;	/* Real lenght we extract */
+ 	int err;
+ 
+ 	p.pi = pi;     /* In case handler needs to know */
+ 	p.pl = buf[1]; /* Extract lenght of value */
+ 	p.pv.i = 0;    /* Clear value */
++	extract_len = p.pl;	/* Default : extract all */
+ 
+ 	/* Check if buffer is long enough for parsing */
+ 	if (len < (2+p.pl)) {
+@@ -220,18 +222,30 @@
+ 	/* 
+ 	 * Check that the integer length is what we expect it to be. If the
+ 	 * handler want a 16 bits integer then a 32 bits is not good enough
++	 * PV_INTEGER means that the handler is flexible.
+ 	 */
+ 	if (((type & PV_MASK) != PV_INTEGER) && ((type & PV_MASK) != p.pl)) {
+ 		ERROR(__FUNCTION__ "(), invalid parameter length! "
+ 		      "Expected %d bytes, but value had %d bytes!\n",
+ 		      type & PV_MASK, p.pl);
+ 		
+-		/* Skip parameter */
+-		return p.pl+2;
++		/* Most parameters are bit/byte fields or little endian,
++		 * so it's ok to only extract a subset of it (the subset
++		 * that the handler expect). This is necessary, as some
++		 * broken implementations seems to add extra undefined bits.
++		 * If the parameter is shorter than we expect or is big
++		 * endian, we can't play those tricks. Jean II */
++		if((p.pl < (type & PV_MASK)) || (type & PV_BIG_ENDIAN)) {
++			/* Skip parameter */
++			return p.pl+2;
++		} else {
++			/* Extract subset of it, fallthrough */
++			extract_len = type & PV_MASK;
++		}
+ 	}
+ 
+ 
+-	switch (p.pl) {
++	switch (extract_len) {
+ 	case 1:
+ 		n += irda_param_unpack(buf+2, "b", &p.pv.i);
+ 		break;
diff --git a/recipes/linux/files/iw240_we15-6.diff b/recipes/linux/files/iw240_we15-6.diff
new file mode 100644
index 0000000000..2ebfd8ec12
--- /dev/null
+++ b/recipes/linux/files/iw240_we15-6.diff
@@ -0,0 +1,399 @@
+diff -u -p linux/include/linux/wireless.14.h linux/include/linux/wireless.h
+--- linux/include/linux/wireless.14.h	Mon Dec  2 18:51:00 2002
++++ linux/include/linux/wireless.h	Mon Dec  2 18:53:35 2002
+@@ -1,7 +1,7 @@
+ /*
+  * This file define a set of standard wireless extensions
+  *
+- * Version :	14	25.1.02
++ * Version :	15	12.7.02
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+  * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
+@@ -80,7 +80,7 @@
+  * (there is some stuff that will be added in the future...)
+  * I just plan to increment with each new version.
+  */
+-#define WIRELESS_EXT	14
++#define WIRELESS_EXT	15
+ 
+ /*
+  * Changes :
+@@ -153,17 +153,32 @@
+  *	- Define additional specific event numbers
+  *	- Add "addr" and "param" fields in union iwreq_data
+  *	- AP scanning stuff (SIOCSIWSCAN and friends)
++ *
++ * V14 to V15
++ * ----------
++ *	- Add IW_PRIV_TYPE_ADDR for struct sockaddr private arg
++ *	- Make struct iw_freq signed (both m & e), add explicit padding
++ *	- Add IWEVCUSTOM for driver specific event/scanning token
++ *	- Add IW_MAX_GET_SPY for driver returning a lot of addresses
++ *	- Add IW_TXPOW_RANGE for range of Tx Powers
++ *	- Add IWEVREGISTERED & IWEVEXPIRED events for Access Points
++ *	- Add IW_MODE_MONITOR for passive monitor
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+ 
+ /* -------------------------- IOCTL LIST -------------------------- */
+ 
+-/* Basic operations */
++/* Wireless Identification */
+ #define SIOCSIWCOMMIT	0x8B00		/* Commit pending changes to driver */
+ #define SIOCGIWNAME	0x8B01		/* get name == wireless protocol */
+-#define SIOCSIWNWID	0x8B02		/* set network id (the cell) */
+-#define SIOCGIWNWID	0x8B03		/* get network id */
++/* SIOCGIWNAME is used to verify the presence of Wireless Extensions.
++ * Common values : "IEEE 802.11-DS", "IEEE 802.11-FH", "IEEE 802.11b"...
++ * Don't put the name of your driver there, it's useless. */
++
++/* Basic operations */
++#define SIOCSIWNWID	0x8B02		/* set network id (pre-802.11) */
++#define SIOCGIWNWID	0x8B03		/* get network id (the cell) */
+ #define SIOCSIWFREQ	0x8B04		/* set channel/frequency (Hz) */
+ #define SIOCGIWFREQ	0x8B05		/* get channel/frequency (Hz) */
+ #define SIOCSIWMODE	0x8B06		/* set operation mode */
+@@ -178,16 +193,18 @@
+ #define SIOCGIWPRIV	0x8B0D		/* get private ioctl interface info */
+ #define SIOCSIWSTATS	0x8B0E		/* Unused */
+ #define SIOCGIWSTATS	0x8B0F		/* Get /proc/net/wireless stats */
++/* SIOCGIWSTATS is strictly used between user space and the kernel, and
++ * is never passed to the driver (i.e. the driver will never see it). */
+ 
+-/* Mobile IP support */
++/* Mobile IP support (statistics per MAC address) */
+ #define SIOCSIWSPY	0x8B10		/* set spy addresses */
+ #define SIOCGIWSPY	0x8B11		/* get spy info (quality of link) */
+ 
+ /* Access Point manipulation */
+ #define SIOCSIWAP	0x8B14		/* set access point MAC addresses */
+ #define SIOCGIWAP	0x8B15		/* get access point MAC addresses */
+-#define SIOCGIWAPLIST	0x8B17		/* get list of access point in range */
+-#define SIOCSIWSCAN	0x8B18		/* trigger scanning */
++#define SIOCGIWAPLIST	0x8B17		/* Deprecated in favor of scanning */
++#define SIOCSIWSCAN	0x8B18		/* trigger scanning (list cells) */
+ #define SIOCGIWSCAN	0x8B19		/* get scanning results */
+ 
+ /* 802.11 specific support */
+@@ -197,9 +214,7 @@
+ #define SIOCGIWNICKN	0x8B1D		/* get node name/nickname */
+ /* As the ESSID and NICKN are strings up to 32 bytes long, it doesn't fit
+  * within the 'iwreq' structure, so we need to use the 'data' member to
+- * point to a string in user space, like it is done for RANGE...
+- * The "flags" member indicate if the ESSID is active or not (promiscuous).
+- */
++ * point to a string in user space, like it is done for RANGE... */
+ 
+ /* Other parameters useful in 802.11 and some other devices */
+ #define SIOCSIWRATE	0x8B20		/* set default bit rate (bps) */
+@@ -257,7 +272,10 @@
+ /* Most events use the same identifier as ioctl requests */
+ 
+ #define IWEVTXDROP	0x8C00		/* Packet dropped to excessive retry */
+-#define IWEVQUAL	0x8C01		/* Quality part of statistics */
++#define IWEVQUAL	0x8C01		/* Quality part of statistics (scan) */
++#define IWEVCUSTOM	0x8C02		/* Driver specific ascii string */
++#define IWEVREGISTERED	0x8C03		/* Discovered a new node (AP mode) */
++#define IWEVEXPIRED	0x8C04		/* Expired a node (AP mode) */
+ 
+ #define IWEVFIRST	0x8C00
+ 
+@@ -273,7 +291,8 @@
+ #define IW_PRIV_TYPE_BYTE	0x1000	/* Char as number */
+ #define IW_PRIV_TYPE_CHAR	0x2000	/* Char as character */
+ #define IW_PRIV_TYPE_INT	0x4000	/* 32 bits int */
+-#define IW_PRIV_TYPE_FLOAT	0x5000
++#define IW_PRIV_TYPE_FLOAT	0x5000	/* struct iw_freq */
++#define IW_PRIV_TYPE_ADDR	0x6000	/* struct sockaddr */
+ 
+ #define IW_PRIV_SIZE_FIXED	0x0800	/* Variable or fixed nuber of args */
+ 
+@@ -297,13 +316,16 @@
+ 
+ /* Maximum tx powers in the range struct */
+ #define IW_MAX_TXPOWER		8
++/* Note : if you more than 8 TXPowers, just set the max and min or
++ * a few of them in the struct iw_range. */
+ 
+ /* Maximum of address that you may set with SPY */
+-#define IW_MAX_SPY		8
++#define IW_MAX_SPY		8	/* set */
++#define IW_MAX_GET_SPY		64	/* get */
+ 
+ /* Maximum of address that you may get in the
+    list of access points in range */
+-#define IW_MAX_AP		8
++#define IW_MAX_AP		64
+ 
+ /* Maximum size of the ESSID and NICKN strings */
+ #define IW_ESSID_MAX_SIZE	32
+@@ -315,6 +337,7 @@
+ #define IW_MODE_MASTER	3	/* Synchronisation master or Access Point */
+ #define IW_MODE_REPEAT	4	/* Wireless Repeater (forwarder) */
+ #define IW_MODE_SECOND	5	/* Secondary master/repeater (backup) */
++#define IW_MODE_MONITOR	6	/* Passive monitor (listen only) */
+ 
+ /* Maximum number of size of encoding token available
+  * they are listed in the range structure */
+@@ -350,8 +373,10 @@
+ #define IW_POWER_RELATIVE	0x0004	/* Value is not in seconds/ms/us */
+ 
+ /* Transmit Power flags available */
++#define IW_TXPOW_TYPE		0x00FF	/* Type of value */
+ #define IW_TXPOW_DBM		0x0000	/* Value is in dBm */
+ #define IW_TXPOW_MWATT		0x0001	/* Value is in mW */
++#define IW_TXPOW_RANGE		0x1000	/* Range of value between min/max */
+ 
+ /* Retry limits and lifetime flags available */
+ #define IW_RETRY_ON		0x0000	/* No details... */
+@@ -376,6 +401,9 @@
+ /* Maximum size of returned data */
+ #define IW_SCAN_MAX_DATA	4096	/* In bytes */
+ 
++/* Max number of char in custom event - use multiple of them if needed */
++#define IW_CUSTOM_MAX		256	/* In bytes */
++
+ /****************************** TYPES ******************************/
+ 
+ /* --------------------------- SUBTYPES --------------------------- */
+@@ -411,9 +439,10 @@ struct	iw_point
+  */
+ struct	iw_freq
+ {
+-	__u32		m;		/* Mantissa */
+-	__u16		e;		/* Exponent */
++	__s32		m;		/* Mantissa */
++	__s16		e;		/* Exponent */
+ 	__u8		i;		/* List index (when in range struct) */
++	__u8		pad;		/* Unused - just for alignement */
+ };
+ 
+ /*
+diff -u -p linux/include/net/iw_handler.14.h linux/include/net/iw_handler.h
+--- linux/include/net/iw_handler.14.h	Mon Dec  2 18:51:17 2002
++++ linux/include/net/iw_handler.h	Mon Dec  2 18:54:51 2002
+@@ -1,7 +1,7 @@
+ /*
+  * This file define the new driver API for Wireless Extensions
+  *
+- * Version :	3	17.1.02
++ * Version :	4	21.6.02
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+  * Copyright (c) 2001-2002 Jean Tourrilhes, All Rights Reserved.
+@@ -206,7 +206,7 @@
+  * will be needed...
+  * I just plan to increment with each new version.
+  */
+-#define IW_HANDLER_VERSION	3
++#define IW_HANDLER_VERSION	4
+ 
+ /*
+  * Changes :
+@@ -217,6 +217,9 @@
+  *	- Add Wireless Event support :
+  *		o wireless_send_event() prototype
+  *		o iwe_stream_add_event/point() inline functions
++ * V3 to V4
++ * --------
++ *	- Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+@@ -233,10 +236,10 @@
+ #define IW_HEADER_TYPE_CHAR	2	/* char [IFNAMSIZ] */
+ #define IW_HEADER_TYPE_UINT	4	/* __u32 */
+ #define IW_HEADER_TYPE_FREQ	5	/* struct iw_freq */
+-#define IW_HEADER_TYPE_POINT	6	/* struct iw_point */
+-#define IW_HEADER_TYPE_PARAM	7	/* struct iw_param */
+-#define IW_HEADER_TYPE_ADDR	8	/* struct sockaddr */
+-#define IW_HEADER_TYPE_QUAL	9	/* struct iw_quality */
++#define IW_HEADER_TYPE_ADDR	6	/* struct sockaddr */
++#define IW_HEADER_TYPE_POINT	8	/* struct iw_point */
++#define IW_HEADER_TYPE_PARAM	9	/* struct iw_param */
++#define IW_HEADER_TYPE_QUAL	10	/* struct iw_quality */
+ 
+ /* Handling flags */
+ /* Most are not implemented. I just use them as a reminder of some
+diff -u -p linux/net/core/wireless.14.c linux/net/core/wireless.c
+--- linux/net/core/wireless.14.c	Mon Dec  2 18:51:35 2002
++++ linux/net/core/wireless.c	Mon Dec  2 18:53:10 2002
+@@ -33,8 +33,16 @@
+  *	o Propagate events as rtnetlink IFLA_WIRELESS option
+  *	o Generate event on selected SET requests
+  *
+- * v4 - 18.04.01 - Jean II
++ * v4 - 18.04.02 - Jean II
+  *	o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1
++ *
++ * v5 - 21.06.02 - Jean II
++ *	o Add IW_PRIV_TYPE_ADDR in priv_type_size (+cleanup)
++ *	o Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
++ *	o Add IWEVCUSTOM for driver specific event/scanning token
++ *	o Turn on WE_STRICT_WRITE by default + kernel warning
++ *	o Fix WE_STRICT_WRITE in ioctl_export_private() (32 => iw_num)
++ *	o Fix off-by-one in test (extra_size <= IFNAMSIZ)
+  */
+ 
+ /***************************** INCLUDES *****************************/
+@@ -50,8 +58,9 @@
+ 
+ /**************************** CONSTANTS ****************************/
+ 
+-/* This will be turned on later on... */
+-#undef WE_STRICT_WRITE		/* Check write buffer size */
++/* Enough lenience, let's make sure things are proper... */
++#define WE_STRICT_WRITE		/* Check write buffer size */
++/* I'll probably drop both the define and kernel message in the next version */
+ 
+ /* Debuging stuff */
+ #undef WE_IOCTL_DEBUG		/* Debug IOCTL API */
+@@ -106,7 +115,7 @@ static const struct iw_ioctl_description
+ 	/* SIOCSIWSPY */
+ 	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct sockaddr), 0, IW_MAX_SPY, 0},
+ 	/* SIOCGIWSPY */
+-	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_SPY, 0},
++	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_GET_SPY, 0},
+ 	/* -- hole -- */
+ 	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+ 	/* -- hole -- */
+@@ -176,25 +185,41 @@ static const struct iw_ioctl_description
+ 	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
+ 	/* IWEVQUAL */
+ 	{ IW_HEADER_TYPE_QUAL, 0, 0, 0, 0, 0},
++	/* IWEVCUSTOM */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_CUSTOM_MAX, 0},
++	/* IWEVREGISTERED */
++	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
++	/* IWEVEXPIRED */
++	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
+ };
+ static const int standard_event_num = (sizeof(standard_event) /
+ 				       sizeof(struct iw_ioctl_description));
+ 
+ /* Size (in bytes) of the various private data types */
+-static const char priv_type_size[] = { 0, 1, 1, 0, 4, 4, 0, 0 };
++static const char priv_type_size[] = {
++	0,				/* IW_PRIV_TYPE_NONE */
++	1,				/* IW_PRIV_TYPE_BYTE */
++	1,				/* IW_PRIV_TYPE_CHAR */
++	0,				/* Not defined */
++	sizeof(__u32),			/* IW_PRIV_TYPE_INT */
++	sizeof(struct iw_freq),		/* IW_PRIV_TYPE_FLOAT */
++	sizeof(struct sockaddr),	/* IW_PRIV_TYPE_ADDR */
++	0,				/* Not defined */
++};
+ 
+ /* Size (in bytes) of various events */
+ static const int event_type_size[] = {
+-	IW_EV_LCP_LEN,
++	IW_EV_LCP_LEN,			/* IW_HEADER_TYPE_NULL */
++	0,
++	IW_EV_CHAR_LEN,			/* IW_HEADER_TYPE_CHAR */
+ 	0,
+-	IW_EV_CHAR_LEN,
++	IW_EV_UINT_LEN,			/* IW_HEADER_TYPE_UINT */
++	IW_EV_FREQ_LEN,			/* IW_HEADER_TYPE_FREQ */
++	IW_EV_ADDR_LEN,			/* IW_HEADER_TYPE_ADDR */
+ 	0,
+-	IW_EV_UINT_LEN,
+-	IW_EV_FREQ_LEN,
+ 	IW_EV_POINT_LEN,		/* Without variable payload */
+-	IW_EV_PARAM_LEN,
+-	IW_EV_ADDR_LEN,
+-	IW_EV_QUAL_LEN,
++	IW_EV_PARAM_LEN,		/* IW_HEADER_TYPE_PARAM */
++	IW_EV_QUAL_LEN,			/* IW_HEADER_TYPE_QUAL */
+ };
+ 
+ /************************ COMMON SUBROUTINES ************************/
+@@ -440,8 +465,10 @@ static inline int ioctl_export_private(s
+ 		return -EFAULT;
+ #ifdef WE_STRICT_WRITE
+ 	/* Check if there is enough buffer up there */
+-	if(iwr->u.data.length < (SIOCIWLASTPRIV - SIOCIWFIRSTPRIV + 1))
++	if(iwr->u.data.length < dev->wireless_handlers->num_private_args) {
++		printk(KERN_ERR "%s (WE) : Buffer for request SIOCGIWPRIV too small (%d<%d)\n", dev->name, iwr->u.data.length, dev->wireless_handlers->num_private_args);
+ 		return -E2BIG;
++	}
+ #endif	/* WE_STRICT_WRITE */
+ 
+ 	/* Set the number of available ioctls. */
+@@ -471,6 +498,7 @@ static inline int ioctl_standard_call(st
+ 	const struct iw_ioctl_description *	descr;
+ 	struct iw_request_info			info;
+ 	int					ret = -EINVAL;
++	int					user_size = 0;
+ 
+ 	/* Get the description of the IOCTL */
+ 	if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
+@@ -518,11 +546,8 @@ static inline int ioctl_standard_call(st
+ 			/* Check NULL pointer */
+ 			if(iwr->u.data.pointer == NULL)
+ 				return -EFAULT;
+-#ifdef WE_STRICT_WRITE
+-			/* Check if there is enough buffer up there */
+-			if(iwr->u.data.length < descr->max_tokens)
+-				return -E2BIG;
+-#endif	/* WE_STRICT_WRITE */
++			/* Save user space buffer size for checking */
++			user_size = iwr->u.data.length;
+ 		}
+ 
+ #ifdef WE_IOCTL_DEBUG
+@@ -559,6 +584,15 @@ static inline int ioctl_standard_call(st
+ 
+ 		/* If we have something to return to the user */
+ 		if (!ret && IW_IS_GET(cmd)) {
++#ifdef WE_STRICT_WRITE
++			/* Check if there is enough buffer up there */
++			if(user_size < iwr->u.data.length) {
++				printk(KERN_ERR "%s (WE) : Buffer for request %04X too small (%d<%d)\n", dev->name, cmd, user_size, iwr->u.data.length);
++				kfree(extra);
++				return -E2BIG;
++			}
++#endif	/* WE_STRICT_WRITE */
++
+ 			err = copy_to_user(iwr->u.data.pointer, extra,
+ 					   iwr->u.data.length *
+ 					   descr->token_size);
+@@ -646,12 +680,18 @@ static inline int ioctl_private_call(str
+ 	/* Compute the size of the set/get arguments */
+ 	if(descr != NULL) {
+ 		if(IW_IS_SET(cmd)) {
++			int	offset = 0;	/* For sub-ioctls */
++			/* Check for sub-ioctl handler */
++			if(descr->name[0] == '\0')
++				/* Reserve one int for sub-ioctl index */
++				offset = sizeof(__u32);
++
+ 			/* Size of set arguments */
+ 			extra_size = get_priv_size(descr->set_args);
+ 
+ 			/* Does it fits in iwr ? */
+ 			if((descr->set_args & IW_PRIV_SIZE_FIXED) &&
+-			   (extra_size < IFNAMSIZ))
++			   ((extra_size + offset) <= IFNAMSIZ))
+ 				extra_size = 0;
+ 		} else {
+ 			/* Size of set arguments */
+@@ -659,7 +699,7 @@ static inline int ioctl_private_call(str
+ 
+ 			/* Does it fits in iwr ? */
+ 			if((descr->get_args & IW_PRIV_SIZE_FIXED) &&
+-			   (extra_size < IFNAMSIZ))
++			   (extra_size <= IFNAMSIZ))
+ 				extra_size = 0;
+ 		}
+ 	}
+@@ -925,7 +965,7 @@ void wireless_send_event(struct net_devi
+ 		 * The best the driver could do is to log an error message.
+ 		 * We will do it ourselves instead...
+ 		 */
+-	  	printk(KERN_ERR "%s (WE) : Invalid Wireless Event (0x%04X)\n",
++	  	printk(KERN_ERR "%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
+ 		       dev->name, cmd);
+ 		return;
+ 	}
diff --git a/recipes/linux/files/iw240_we18-5.diff b/recipes/linux/files/iw240_we18-5.diff
new file mode 100644
index 0000000000..f65987588d
--- /dev/null
+++ b/recipes/linux/files/iw240_we18-5.diff
@@ -0,0 +1,421 @@
+diff -u -p linux/include/linux/wireless.we17.h linux/include/linux/wireless.h
+--- linux/include/linux/wireless.we17.h	2005-05-20 11:25:49.000000000 -0700
++++ linux/include/linux/wireless.h	2005-05-20 11:29:05.000000000 -0700
+@@ -1,10 +1,10 @@
+ /*
+  * This file define a set of standard wireless extensions
+  *
+- * Version :	17	21.6.04
++ * Version :	18	12.3.05
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2004 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2005 Jean Tourrilhes, All Rights Reserved.
+  */
+ 
+ #ifndef _LINUX_WIRELESS_H
+@@ -82,7 +82,7 @@
+  * (there is some stuff that will be added in the future...)
+  * I just plan to increment with each new version.
+  */
+-#define WIRELESS_EXT	17
++#define WIRELESS_EXT	18
+ 
+ /*
+  * Changes :
+@@ -182,6 +182,21 @@
+  *	- Document (struct iw_quality *)->updated, add new flags (INVALID)
+  *	- Wireless Event capability in struct iw_range
+  *	- Add support for relative TxPower (yick !)
++ *
++ * V17 to V18 (From Jouni Malinen <jkmaline@cc.hut.fi>)
++ * ----------
++ *	- Add support for WPA/WPA2
++ *	- Add extended encoding configuration (SIOCSIWENCODEEXT and
++ *	  SIOCGIWENCODEEXT)
++ *	- Add SIOCSIWGENIE/SIOCGIWGENIE
++ *	- Add SIOCSIWMLME
++ *	- Add SIOCSIWPMKSA
++ *	- Add struct iw_range bit field for supported encoding capabilities
++ *	- Add optional scan request parameters for SIOCSIWSCAN
++ *	- Add SIOCSIWAUTH/SIOCGIWAUTH for setting authentication and WPA
++ *	  related parameters (extensible up to 4096 parameter values)
++ *	- Add wireless events: IWEVGENIE, IWEVMICHAELMICFAILURE,
++ *	  IWEVASSOCREQIE, IWEVASSOCRESPIE, IWEVPMKIDCAND
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+@@ -256,6 +271,30 @@
+ #define SIOCSIWPOWER	0x8B2C		/* set Power Management settings */
+ #define SIOCGIWPOWER	0x8B2D		/* get Power Management settings */
+ 
++/* WPA : Generic IEEE 802.11 informatiom element (e.g., for WPA/RSN/WMM).
++ * This ioctl uses struct iw_point and data buffer that includes IE id and len
++ * fields. More than one IE may be included in the request. Setting the generic
++ * IE to empty buffer (len=0) removes the generic IE from the driver. Drivers
++ * are allowed to generate their own WPA/RSN IEs, but in these cases, drivers
++ * are required to report the used IE as a wireless event, e.g., when
++ * associating with an AP. */
++#define SIOCSIWGENIE	0x8B30		/* set generic IE */
++#define SIOCGIWGENIE	0x8B31		/* get generic IE */
++
++/* WPA : IEEE 802.11 MLME requests */
++#define SIOCSIWMLME	0x8B16		/* request MLME operation; uses
++					 * struct iw_mlme */
++/* WPA : Authentication mode parameters */
++#define SIOCSIWAUTH	0x8B32		/* set authentication mode params */
++#define SIOCGIWAUTH	0x8B33		/* get authentication mode params */
++
++/* WPA : Extended version of encoding configuration */
++#define SIOCSIWENCODEEXT 0x8B34		/* set encoding token & mode */
++#define SIOCGIWENCODEEXT 0x8B35		/* get encoding token & mode */
++
++/* WPA2 : PMKSA cache management */
++#define SIOCSIWPMKSA	0x8B36		/* PMKSA cache operation */
++
+ /* -------------------- DEV PRIVATE IOCTL LIST -------------------- */
+ 
+ /* These 32 ioctl are wireless device private, for 16 commands.
+@@ -297,6 +336,34 @@
+ #define IWEVCUSTOM	0x8C02		/* Driver specific ascii string */
+ #define IWEVREGISTERED	0x8C03		/* Discovered a new node (AP mode) */
+ #define IWEVEXPIRED	0x8C04		/* Expired a node (AP mode) */
++#define IWEVGENIE	0x8C05		/* Generic IE (WPA, RSN, WMM, ..)
++					 * (scan results); This includes id and
++					 * length fields. One IWEVGENIE may
++					 * contain more than one IE. Scan
++					 * results may contain one or more
++					 * IWEVGENIE events. */
++#define IWEVMICHAELMICFAILURE 0x8C06	/* Michael MIC failure
++					 * (struct iw_michaelmicfailure)
++					 */
++#define IWEVASSOCREQIE	0x8C07		/* IEs used in (Re)Association Request.
++					 * The data includes id and length
++					 * fields and may contain more than one
++					 * IE. This event is required in
++					 * Managed mode if the driver
++					 * generates its own WPA/RSN IE. This
++					 * should be sent just before
++					 * IWEVREGISTERED event for the
++					 * association. */
++#define IWEVASSOCRESPIE	0x8C08		/* IEs used in (Re)Association
++					 * Response. The data includes id and
++					 * length fields and may contain more
++					 * than one IE. This may be sent
++					 * between IWEVASSOCREQIE and
++					 * IWEVREGISTERED events for the
++					 * association. */
++#define IWEVPMKIDCAND	0x8C09		/* PMKID candidate for RSN
++					 * pre-authentication
++					 * (struct iw_pmkid_cand) */
+ 
+ #define IWEVFIRST	0x8C00
+ 
+@@ -432,12 +499,94 @@
+ #define IW_SCAN_THIS_MODE	0x0020	/* Scan only this Mode */
+ #define IW_SCAN_ALL_RATE	0x0040	/* Scan all Bit-Rates */
+ #define IW_SCAN_THIS_RATE	0x0080	/* Scan only this Bit-Rate */
++/* struct iw_scan_req scan_type */
++#define IW_SCAN_TYPE_ACTIVE 0
++#define IW_SCAN_TYPE_PASSIVE 1
+ /* Maximum size of returned data */
+ #define IW_SCAN_MAX_DATA	4096	/* In bytes */
+ 
+ /* Max number of char in custom event - use multiple of them if needed */
+ #define IW_CUSTOM_MAX		256	/* In bytes */
+ 
++/* Generic information element */
++#define IW_GENERIC_IE_MAX	1024
++
++/* MLME requests (SIOCSIWMLME / struct iw_mlme) */
++#define IW_MLME_DEAUTH		0
++#define IW_MLME_DISASSOC	1
++
++/* SIOCSIWAUTH/SIOCGIWAUTH struct iw_param flags */
++#define IW_AUTH_INDEX		0x0FFF
++#define IW_AUTH_FLAGS		0xF000
++/* SIOCSIWAUTH/SIOCGIWAUTH parameters (0 .. 4095)
++ * (IW_AUTH_INDEX mask in struct iw_param flags; this is the index of the
++ * parameter that is being set/get to; value will be read/written to
++ * struct iw_param value field) */
++#define IW_AUTH_WPA_VERSION		0
++#define IW_AUTH_CIPHER_PAIRWISE		1
++#define IW_AUTH_CIPHER_GROUP		2
++#define IW_AUTH_KEY_MGMT		3
++#define IW_AUTH_TKIP_COUNTERMEASURES	4
++#define IW_AUTH_DROP_UNENCRYPTED	5
++#define IW_AUTH_80211_AUTH_ALG		6
++#define IW_AUTH_WPA_ENABLED		7
++#define IW_AUTH_RX_UNENCRYPTED_EAPOL	8
++#define IW_AUTH_ROAMING_CONTROL		9
++#define IW_AUTH_PRIVACY_INVOKED		10
++
++/* IW_AUTH_WPA_VERSION values (bit field) */
++#define IW_AUTH_WPA_VERSION_DISABLED	0x00000001
++#define IW_AUTH_WPA_VERSION_WPA		0x00000002
++#define IW_AUTH_WPA_VERSION_WPA2	0x00000004
++
++/* IW_AUTH_PAIRWISE_CIPHER and IW_AUTH_GROUP_CIPHER values (bit field) */
++#define IW_AUTH_CIPHER_NONE	0x00000001
++#define IW_AUTH_CIPHER_WEP40	0x00000002
++#define IW_AUTH_CIPHER_TKIP	0x00000004
++#define IW_AUTH_CIPHER_CCMP	0x00000008
++#define IW_AUTH_CIPHER_WEP104	0x00000010
++
++/* IW_AUTH_KEY_MGMT values (bit field) */
++#define IW_AUTH_KEY_MGMT_802_1X	1
++#define IW_AUTH_KEY_MGMT_PSK	2
++
++/* IW_AUTH_80211_AUTH_ALG values (bit field) */
++#define IW_AUTH_ALG_OPEN_SYSTEM	0x00000001
++#define IW_AUTH_ALG_SHARED_KEY	0x00000002
++#define IW_AUTH_ALG_LEAP	0x00000004
++
++/* IW_AUTH_ROAMING_CONTROL values */
++#define IW_AUTH_ROAMING_ENABLE	0	/* driver/firmware based roaming */
++#define IW_AUTH_ROAMING_DISABLE	1	/* user space program used for roaming
++					 * control */
++
++/* SIOCSIWENCODEEXT definitions */
++#define IW_ENCODE_SEQ_MAX_SIZE	8
++/* struct iw_encode_ext ->alg */
++#define IW_ENCODE_ALG_NONE	0
++#define IW_ENCODE_ALG_WEP	1
++#define IW_ENCODE_ALG_TKIP	2
++#define IW_ENCODE_ALG_CCMP	3
++/* struct iw_encode_ext ->ext_flags */
++#define IW_ENCODE_EXT_TX_SEQ_VALID	0x00000001
++#define IW_ENCODE_EXT_RX_SEQ_VALID	0x00000002
++#define IW_ENCODE_EXT_GROUP_KEY		0x00000004
++#define IW_ENCODE_EXT_SET_TX_KEY	0x00000008
++
++/* IWEVMICHAELMICFAILURE : struct iw_michaelmicfailure ->flags */
++#define IW_MICFAILURE_KEY_ID	0x00000003 /* Key ID 0..3 */
++#define IW_MICFAILURE_GROUP	0x00000004
++#define IW_MICFAILURE_PAIRWISE	0x00000008
++#define IW_MICFAILURE_STAKEY	0x00000010
++#define IW_MICFAILURE_COUNT	0x00000060 /* 1 or 2 (0 = count not supported)
++					    */
++
++/* Bit field values for enc_capa in struct iw_range */
++#define IW_ENC_CAPA_WPA		0x00000001
++#define IW_ENC_CAPA_WPA2	0x00000002
++#define IW_ENC_CAPA_CIPHER_TKIP	0x00000004
++#define IW_ENC_CAPA_CIPHER_CCMP	0x00000008
++
+ /* Event capability macros - in (struct iw_range *)->event_capa
+  * Because we have more than 32 possible events, we use an array of
+  * 32 bit bitmasks. Note : 32 bits = 0x20 = 2^5. */
+@@ -546,6 +695,132 @@ struct	iw_thrspy
+ 	struct iw_quality	high;		/* High threshold */
+ };
+ 
++/*
++ *	Optional data for scan request
++ *
++ *	Note: these optional parameters are controlling parameters for the
++ *	scanning behavior, these do not apply to getting scan results
++ *	(SIOCGIWSCAN). Drivers are expected to keep a local BSS table and
++ *	provide a merged results with all BSSes even if the previous scan
++ *	request limited scanning to a subset, e.g., by specifying an SSID.
++ *	Especially, scan results are required to include an entry for the
++ *	current BSS if the driver is in Managed mode and associated with an AP.
++ */
++struct	iw_scan_req
++{
++	__u8		scan_type; /* IW_SCAN_TYPE_{ACTIVE,PASSIVE} */
++	__u8		essid_len;
++	__u8		num_channels; /* num entries in channel_list;
++				       * 0 = scan all allowed channels */
++	__u8		flags; /* reserved as padding; use zero, this may
++				* be used in the future for adding flags
++				* to request different scan behavior */
++	struct sockaddr	bssid; /* ff:ff:ff:ff:ff:ff for broadcast BSSID or
++				* individual address of a specific BSS */
++
++	/*
++	 * Use this ESSID if IW_SCAN_THIS_ESSID flag is used instead of using
++	 * the current ESSID. This allows scan requests for specific ESSID
++	 * without having to change the current ESSID and potentially breaking
++	 * the current association.
++	 */
++	__u8		essid[IW_ESSID_MAX_SIZE];
++
++	/*
++	 * Optional parameters for changing the default scanning behavior.
++	 * These are based on the MLME-SCAN.request from IEEE Std 802.11.
++	 * TU is 1.024 ms. If these are set to 0, driver is expected to use
++	 * reasonable default values. min_channel_time defines the time that
++	 * will be used to wait for the first reply on each channel. If no
++	 * replies are received, next channel will be scanned after this. If
++	 * replies are received, total time waited on the channel is defined by
++	 * max_channel_time.
++	 */
++	__u32		min_channel_time; /* in TU */
++	__u32		max_channel_time; /* in TU */
++
++	struct iw_freq	channel_list[IW_MAX_FREQUENCIES];
++};
++
++/* ------------------------- WPA SUPPORT ------------------------- */
++
++/*
++ *	Extended data structure for get/set encoding (this is used with
++ *	SIOCSIWENCODEEXT/SIOCGIWENCODEEXT. struct iw_point and IW_ENCODE_*
++ *	flags are used in the same way as with SIOCSIWENCODE/SIOCGIWENCODE and
++ *	only the data contents changes (key data -> this structure, including
++ *	key data).
++ *
++ *	If the new key is the first group key, it will be set as the default
++ *	TX key. Otherwise, default TX key index is only changed if
++ *	IW_ENCODE_EXT_SET_TX_KEY flag is set.
++ *
++ *	Key will be changed with SIOCSIWENCODEEXT in all cases except for
++ *	special "change TX key index" operation which is indicated by setting
++ *	key_len = 0 and ext_flags |= IW_ENCODE_EXT_SET_TX_KEY.
++ *
++ *	tx_seq/rx_seq are only used when respective
++ *	IW_ENCODE_EXT_{TX,RX}_SEQ_VALID flag is set in ext_flags. Normal
++ *	TKIP/CCMP operation is to set RX seq with SIOCSIWENCODEEXT and start
++ *	TX seq from zero whenever key is changed. SIOCGIWENCODEEXT is normally
++ *	used only by an Authenticator (AP or an IBSS station) to get the
++ *	current TX sequence number. Using TX_SEQ_VALID for SIOCSIWENCODEEXT and
++ *	RX_SEQ_VALID for SIOCGIWENCODEEXT are optional, but can be useful for
++ *	debugging/testing.
++ */
++struct	iw_encode_ext
++{
++	__u32		ext_flags; /* IW_ENCODE_EXT_* */
++	__u8		tx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
++	__u8		rx_seq[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
++	struct sockaddr	addr; /* ff:ff:ff:ff:ff:ff for broadcast/multicast
++			       * (group) keys or unicast address for
++			       * individual keys */
++	__u16		alg; /* IW_ENCODE_ALG_* */
++	__u16		key_len;
++	__u8		key[0];
++};
++
++/* SIOCSIWMLME data */
++struct	iw_mlme
++{
++	__u16		cmd; /* IW_MLME_* */
++	__u16		reason_code;
++	struct sockaddr	addr;
++};
++
++/* SIOCSIWPMKSA data */
++#define IW_PMKSA_ADD		1
++#define IW_PMKSA_REMOVE		2
++#define IW_PMKSA_FLUSH		3
++
++#define IW_PMKID_LEN	16
++
++struct	iw_pmksa
++{
++	__u32		cmd; /* IW_PMKSA_* */
++	struct sockaddr	bssid;
++	__u8		pmkid[IW_PMKID_LEN];
++};
++
++/* IWEVMICHAELMICFAILURE data */
++struct	iw_michaelmicfailure
++{
++	__u32		flags;
++	struct sockaddr	src_addr;
++	__u8		tsc[IW_ENCODE_SEQ_MAX_SIZE]; /* LSB first */
++};
++
++/* IWEVPMKIDCAND data */
++#define IW_PMKID_CAND_PREAUTH	0x00000001 /* RNS pre-authentication enabled */
++struct	iw_pmkid_cand
++{
++	__u32		flags; /* IW_PMKID_CAND_* */
++	__u32		index; /* the smaller the index, the higher the
++				* priority */
++	struct sockaddr	bssid;
++};
++
+ /* ------------------------ WIRELESS STATS ------------------------ */
+ /*
+  * Wireless statistics (used for /proc/net/wireless)
+@@ -725,6 +1000,8 @@ struct	iw_range
+ 	struct iw_freq	freq[IW_MAX_FREQUENCIES];	/* list */
+ 	/* Note : this frequency list doesn't need to fit channel numbers,
+ 	 * because each entry contain its channel index */
++
++	__u32		enc_capa; /* IW_ENC_CAPA_* bit field */
+ };
+ 
+ /*
+diff -u -p linux/net/core/wireless.we17.c linux/net/core/wireless.c
+--- linux/net/core/wireless.we17.c	2005-05-20 11:26:11.000000000 -0700
++++ linux/net/core/wireless.c	2005-05-20 15:37:09.000000000 -0700
+@@ -2,7 +2,7 @@
+  * This file implement the Wireless Extensions APIs.
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2004 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2005 Jean Tourrilhes, All Rights Reserved.
+  *
+  * (As all part of the Linux kernel, this file is GPL)
+  */
+@@ -137,12 +137,12 @@ static const struct iw_ioctl_description
+ 	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWAP */
+ 	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
+-	/* -- hole -- */
+-	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCSIWMLME */
++	{ IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_mlme), sizeof(struct iw_mlme), 0},
+ 	/* SIOCGIWAPLIST */
+ 	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, IW_DESCR_FLAG_NOMAX},
+ 	/* SIOCSIWSCAN */
+-	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_scan_req), 0},
+ 	/* SIOCGIWSCAN */
+ 	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_SCAN_MAX_DATA, IW_DESCR_FLAG_NOMAX},
+ 	/* SIOCSIWESSID */
+@@ -185,6 +185,25 @@ static const struct iw_ioctl_description
+ 	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWPOWER */
+ 	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCSIWGENIE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
++	/* SIOCGIWGENIE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
++	/* SIOCSIWAUTH */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWAUTH */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCSIWENCODEEXT */
++	{ IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_encode_ext), sizeof(struct iw_encode_ext) + IW_ENCODING_TOKEN_MAX, 0},
++	/* SIOCGIWENCODEEXT */
++	{ IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_encode_ext), sizeof(struct iw_encode_ext) + IW_ENCODING_TOKEN_MAX, 0},
++	/* SIOCSIWPMKSA */
++	{ IW_HEADER_TYPE_POINT, 0, 1, sizeof(struct iw_pmksa), sizeof(struct iw_pmksa), 0},
++	/* -- hole -- */
+ };
+ static const int standard_ioctl_num = (sizeof(standard_ioctl) /
+ 				       sizeof(struct iw_ioctl_description));
+@@ -204,6 +223,16 @@ static const struct iw_ioctl_description
+ 	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
+ 	/* IWEVEXPIRED */
+ 	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
++	/* IWEVGENIE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
++	/* IWEVMICHAELMICFAILURE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_michaelmicfailure), 0},
++	/* IWEVASSOCREQIE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
++	/* IWEVASSOCRESPIE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_GENERIC_IE_MAX, 0},
++	/* IWEVPMKIDCAND */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_pmkid_cand), 0},
+ };
+ static const int standard_event_num = (sizeof(standard_event) /
+ 				       sizeof(struct iw_ioctl_description));
diff --git a/recipes/linux/files/iw241_we16-6.diff b/recipes/linux/files/iw241_we16-6.diff
new file mode 100644
index 0000000000..71cb4c08f6
--- /dev/null
+++ b/recipes/linux/files/iw241_we16-6.diff
@@ -0,0 +1,667 @@
+diff -u -p linux/include/linux/wireless.15.h linux/include/linux/wireless.h
+--- linux/include/linux/wireless.15.h	Fri Jan 10 16:55:07 2003
++++ linux/include/linux/wireless.h	Wed Apr  2 16:33:31 2003
+@@ -1,7 +1,7 @@
+ /*
+  * This file define a set of standard wireless extensions
+  *
+- * Version :	15	12.7.02
++ * Version :	16	2.4.03
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+  * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
+@@ -69,6 +69,8 @@
+ 
+ /***************************** INCLUDES *****************************/
+ 
++/* To minimise problems in user space, I might remove those headers
++ * at some point. Jean II */
+ #include <linux/types.h>		/* for "caddr_t" et al		*/
+ #include <linux/socket.h>		/* for "struct sockaddr" et al	*/
+ #include <linux/if.h>			/* for IFNAMSIZ and co... */
+@@ -80,7 +82,7 @@
+  * (there is some stuff that will be added in the future...)
+  * I just plan to increment with each new version.
+  */
+-#define WIRELESS_EXT	15
++#define WIRELESS_EXT	16
+ 
+ /*
+  * Changes :
+@@ -163,6 +165,16 @@
+  *	- Add IW_TXPOW_RANGE for range of Tx Powers
+  *	- Add IWEVREGISTERED & IWEVEXPIRED events for Access Points
+  *	- Add IW_MODE_MONITOR for passive monitor
++ *
++ * V15 to V16
++ * ----------
++ *	- Increase the number of bitrates in iw_range to 32 (for 802.11g)
++ *	- Increase the number of frequencies in iw_range to 32 (for 802.11b+a)
++ *	- Reshuffle struct iw_range for increases, add filler
++ *	- Increase IW_MAX_AP to 64 for driver returning a lot of addresses
++ *	- Remove IW_MAX_GET_SPY because conflict with enhanced spy support
++ *	- Add SIOCSIWTHRSPY/SIOCGIWTHRSPY and "struct iw_thrspy"
++ *	- Add IW_ENCODE_TEMP and iw_range->encoding_login_index
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+@@ -196,9 +208,11 @@
+ /* SIOCGIWSTATS is strictly used between user space and the kernel, and
+  * is never passed to the driver (i.e. the driver will never see it). */
+ 
+-/* Mobile IP support (statistics per MAC address) */
++/* Spy support (statistics per MAC address - used for Mobile IP support) */
+ #define SIOCSIWSPY	0x8B10		/* set spy addresses */
+ #define SIOCGIWSPY	0x8B11		/* get spy info (quality of link) */
++#define SIOCSIWTHRSPY	0x8B12		/* set spy threshold (spy event) */
++#define SIOCGIWTHRSPY	0x8B13		/* get spy threshold */
+ 
+ /* Access Point manipulation */
+ #define SIOCSIWAP	0x8B14		/* set access point MAC addresses */
+@@ -294,7 +308,7 @@
+ #define IW_PRIV_TYPE_FLOAT	0x5000	/* struct iw_freq */
+ #define IW_PRIV_TYPE_ADDR	0x6000	/* struct sockaddr */
+ 
+-#define IW_PRIV_SIZE_FIXED	0x0800	/* Variable or fixed nuber of args */
++#define IW_PRIV_SIZE_FIXED	0x0800	/* Variable or fixed number of args */
+ 
+ #define IW_PRIV_SIZE_MASK	0x07FF	/* Max number of those args */
+ 
+@@ -306,13 +320,13 @@
+ /* ----------------------- OTHER CONSTANTS ----------------------- */
+ 
+ /* Maximum frequencies in the range struct */
+-#define IW_MAX_FREQUENCIES	16
++#define IW_MAX_FREQUENCIES	32
+ /* Note : if you have something like 80 frequencies,
+  * don't increase this constant and don't fill the frequency list.
+  * The user will be able to set by channel anyway... */
+ 
+ /* Maximum bit rates in the range struct */
+-#define IW_MAX_BITRATES		8
++#define IW_MAX_BITRATES		32
+ 
+ /* Maximum tx powers in the range struct */
+ #define IW_MAX_TXPOWER		8
+@@ -320,8 +334,7 @@
+  * a few of them in the struct iw_range. */
+ 
+ /* Maximum of address that you may set with SPY */
+-#define IW_MAX_SPY		8	/* set */
+-#define IW_MAX_GET_SPY		64	/* get */
++#define IW_MAX_SPY		8
+ 
+ /* Maximum of address that you may get in the
+    list of access points in range */
+@@ -354,7 +367,8 @@
+ #define IW_ENCODE_ENABLED	0x0000	/* Encoding enabled */
+ #define IW_ENCODE_RESTRICTED	0x4000	/* Refuse non-encoded packets */
+ #define IW_ENCODE_OPEN		0x2000	/* Accept non-encoded packets */
+-#define IW_ENCODE_NOKEY         0x0800  /* Key is write only, so not present */
++#define IW_ENCODE_NOKEY		0x0800  /* Key is write only, so not present */
++#define IW_ENCODE_TEMP		0x0400  /* Temporary key */
+ 
+ /* Power management flags available (along with the value, if any) */
+ #define IW_POWER_ON		0x0000	/* No details... */
+@@ -482,6 +496,17 @@ struct	iw_missed
+ 	__u32		beacon;		/* Missed beacons/superframe */
+ };
+ 
++/*
++ *	Quality range (for spy threshold)
++ */
++struct	iw_thrspy
++{
++	struct sockaddr		addr;		/* Source address (hw/mac) */
++	struct iw_quality	qual;		/* Quality of the link */
++	struct iw_quality	low;		/* Low threshold */
++	struct iw_quality	high;		/* High threshold */
++};
++
+ /* ------------------------ WIRELESS STATS ------------------------ */
+ /*
+  * Wireless statistics (used for /proc/net/wireless)
+@@ -534,7 +559,7 @@ union	iwreq_data
+ 	struct iw_quality qual;		/* Quality part of statistics */
+ 
+ 	struct sockaddr	ap_addr;	/* Access point address */
+-	struct sockaddr	addr;		/* Destination address (hw) */
++	struct sockaddr	addr;		/* Destination address (hw/mac) */
+ 
+ 	struct iw_param	param;		/* Other small parameters */
+ 	struct iw_point	data;		/* Other large parameters */
+@@ -582,17 +607,31 @@ struct	iw_range
+ 	__u32		min_nwid;	/* Minimal NWID we are able to set */
+ 	__u32		max_nwid;	/* Maximal NWID we are able to set */
+ 
+-	/* Frequency */
+-	__u16		num_channels;	/* Number of channels [0; num - 1] */
+-	__u8		num_frequency;	/* Number of entry in the list */
+-	struct iw_freq	freq[IW_MAX_FREQUENCIES];	/* list */
+-	/* Note : this frequency list doesn't need to fit channel numbers */
++	/* Old Frequency (backward compat - moved lower ) */
++	__u16		old_num_channels;
++	__u8		old_num_frequency;
++	/* Filler to keep "version" at the same offset */
++	__s32		old_freq[6];
+ 
+ 	/* signal level threshold range */
+ 	__s32	sensitivity;
+ 
+ 	/* Quality of link & SNR stuff */
++	/* Quality range (link, level, noise)
++	 * If the quality is absolute, it will be in the range [0 ; max_qual],
++	 * if the quality is dBm, it will be in the range [max_qual ; 0].
++	 * Don't forget that we use 8 bit arithmetics... */
+ 	struct iw_quality	max_qual;	/* Quality of the link */
++	/* This should contain the average/typical values of the quality
++	 * indicator. This should be the threshold between a "good" and
++	 * a "bad" link (example : monitor going from green to orange).
++	 * Currently, user space apps like quality monitors don't have any
++	 * way to calibrate the measurement. With this, they can split
++	 * the range between 0 and max_qual in different quality level
++	 * (using a geometric subdivision centered on the average).
++	 * I expect that people doing the user space apps will feedback
++	 * us on which value we need to put in each driver... */
++	struct iw_quality	avg_qual;	/* Quality of the link */
+ 
+ 	/* Rates */
+ 	__u8		num_bitrates;	/* Number of entries in the list */
+@@ -619,6 +658,8 @@ struct	iw_range
+ 	__u16	encoding_size[IW_MAX_ENCODING_SIZES];	/* Different token sizes */
+ 	__u8	num_encoding_sizes;	/* Number of entry in the list */
+ 	__u8	max_encoding_tokens;	/* Max number of tokens */
++	/* For drivers that need a "login/passwd" form */
++	__u8	encoding_login_index;	/* token index for login token */
+ 
+ 	/* Transmit power */
+ 	__u16		txpower_capa;	/* What options are supported */
+@@ -638,18 +679,12 @@ struct	iw_range
+ 	__s32		min_r_time;	/* Minimal retry lifetime */
+ 	__s32		max_r_time;	/* Maximal retry lifetime */
+ 
+-	/* Average quality of link & SNR */
+-	struct iw_quality	avg_qual;	/* Quality of the link */
+-	/* This should contain the average/typical values of the quality
+-	 * indicator. This should be the threshold between a "good" and
+-	 * a "bad" link (example : monitor going from green to orange).
+-	 * Currently, user space apps like quality monitors don't have any
+-	 * way to calibrate the measurement. With this, they can split
+-	 * the range between 0 and max_qual in different quality level
+-	 * (using a geometric subdivision centered on the average).
+-	 * I expect that people doing the user space apps will feedback
+-	 * us on which value we need to put in each driver...
+-	 */
++	/* Frequency */
++	__u16		num_channels;	/* Number of channels [0; num - 1] */
++	__u8		num_frequency;	/* Number of entry in the list */
++	struct iw_freq	freq[IW_MAX_FREQUENCIES];	/* list */
++	/* Note : this frequency list doesn't need to fit channel numbers,
++	 * because each entry contain its channel index */
+ };
+ 
+ /*
+diff -u -p linux/include/net/iw_handler.15.h linux/include/net/iw_handler.h
+--- linux/include/net/iw_handler.15.h	Fri Jan 10 16:55:17 2003
++++ linux/include/net/iw_handler.h	Fri Jan 10 17:02:13 2003
+@@ -1,7 +1,7 @@
+ /*
+  * This file define the new driver API for Wireless Extensions
+  *
+- * Version :	4	21.6.02
++ * Version :	5	4.12.02
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+  * Copyright (c) 2001-2002 Jean Tourrilhes, All Rights Reserved.
+@@ -206,7 +206,7 @@
+  * will be needed...
+  * I just plan to increment with each new version.
+  */
+-#define IW_HANDLER_VERSION	4
++#define IW_HANDLER_VERSION	5
+ 
+ /*
+  * Changes :
+@@ -220,10 +220,18 @@
+  * V3 to V4
+  * --------
+  *	- Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
++ *
++ * V4 to V5
++ * --------
++ *	- Add new spy support : struct iw_spy_data & prototypes
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+ 
++/* Enable enhanced spy support. Disable to reduce footprint */
++#define IW_WIRELESS_SPY
++#define IW_WIRELESS_THRSPY
++
+ /* Special error message for the driver to indicate that we
+  * should do a commit after return from the iw_handler */
+ #define EIWCOMMIT	EINPROGRESS
+@@ -315,6 +323,9 @@ struct iw_handler_def
+ 	 * We will automatically export that to user space... */
+ 	struct iw_priv_args *	private_args;
+ 
++	/* Driver enhanced spy support */
++	long			spy_offset;	/* Spy data offset */
++
+ 	/* In the long term, get_wireless_stats will move from
+ 	 * 'struct net_device' to here, to minimise bloat. */
+ };
+@@ -350,6 +361,33 @@ struct iw_ioctl_description
+ 
+ /* Need to think of short header translation table. Later. */
+ 
++/* --------------------- ENHANCED SPY SUPPORT --------------------- */
++/*
++ * In the old days, the driver was handling spy support all by itself.
++ * Now, the driver can delegate this task to Wireless Extensions.
++ * It needs to include this struct in its private part and use the
++ * standard spy iw_handler.
++ */
++
++/*
++ * Instance specific spy data, i.e. addresses spied and quality for them.
++ */
++struct iw_spy_data
++{
++#ifdef IW_WIRELESS_SPY
++	/* --- Standard spy support --- */
++	int			spy_number;
++	u_char			spy_address[IW_MAX_SPY][ETH_ALEN];
++	struct iw_quality	spy_stat[IW_MAX_SPY];
++#ifdef IW_WIRELESS_THRSPY
++	/* --- Enhanced spy support (event) */
++	struct iw_quality	spy_thr_low;	/* Low threshold */
++	struct iw_quality	spy_thr_high;	/* High threshold */
++	u_char			spy_thr_under[IW_MAX_SPY];
++#endif /* IW_WIRELESS_THRSPY */
++#endif /* IW_WIRELESS_SPY */
++};
++
+ /**************************** PROTOTYPES ****************************/
+ /*
+  * Functions part of the Wireless Extensions (defined in net/core/wireless.c).
+@@ -375,6 +413,31 @@ extern void wireless_send_event(struct n
+ 
+ /* We may need a function to send a stream of events to user space.
+  * More on that later... */
++
++/* Standard handler for SIOCSIWSPY */
++extern int iw_handler_set_spy(struct net_device *	dev,
++			      struct iw_request_info *	info,
++			      union iwreq_data *	wrqu,
++			      char *			extra);
++/* Standard handler for SIOCGIWSPY */
++extern int iw_handler_get_spy(struct net_device *	dev,
++			      struct iw_request_info *	info,
++			      union iwreq_data *	wrqu,
++			      char *			extra);
++/* Standard handler for SIOCSIWTHRSPY */
++extern int iw_handler_set_thrspy(struct net_device *	dev,
++				 struct iw_request_info *info,
++				 union iwreq_data *	wrqu,
++				 char *			extra);
++/* Standard handler for SIOCGIWTHRSPY */
++extern int iw_handler_get_thrspy(struct net_device *	dev,
++				 struct iw_request_info *info,
++				 union iwreq_data *	wrqu,
++				 char *			extra);
++/* Driver call to update spy records */
++extern void wireless_spy_update(struct net_device *	dev,
++				unsigned char *		address,
++				struct iw_quality *	wstats);
+ 
+ /************************* INLINE FUNTIONS *************************/
+ /*
+diff -u -p linux/net/core/wireless.15.c linux/net/core/wireless.c
+--- linux/net/core/wireless.15.c	Fri Jan 10 16:56:16 2003
++++ linux/net/core/wireless.c	Fri Jan 10 16:59:55 2003
+@@ -2,7 +2,7 @@
+  * This file implement the Wireless Extensions APIs.
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2003 Jean Tourrilhes, All Rights Reserved.
+  *
+  * (As all part of the Linux kernel, this file is GPL)
+  */
+@@ -43,6 +43,11 @@
+  *	o Turn on WE_STRICT_WRITE by default + kernel warning
+  *	o Fix WE_STRICT_WRITE in ioctl_export_private() (32 => iw_num)
+  *	o Fix off-by-one in test (extra_size <= IFNAMSIZ)
++ *
++ * v6 - 9.01.03 - Jean II
++ *	o Add common spy support : iw_handler_set_spy(), wireless_spy_update()
++ *	o Add enhanced spy support : iw_handler_set_thrspy() and event.
++ *	o Add WIRELESS_EXT version display in /proc/net/wireless
+  */
+ 
+ /***************************** INCLUDES *****************************/
+@@ -52,6 +57,7 @@
+ #include <linux/types.h>		/* off_t */
+ #include <linux/netdevice.h>		/* struct ifreq, dev_get_by_name() */
+ #include <linux/rtnetlink.h>		/* rtnetlink stuff */
++#include <linux/if_arp.h>		/* ARPHRD_ETHER */
+ 
+ #include <linux/wireless.h>		/* Pretty obvious */
+ #include <net/iw_handler.h>		/* New driver API */
+@@ -65,6 +71,7 @@
+ /* Debuging stuff */
+ #undef WE_IOCTL_DEBUG		/* Debug IOCTL API */
+ #undef WE_EVENT_DEBUG		/* Debug Event dispatcher */
++#undef WE_SPY_DEBUG		/* Debug enhanced spy support */
+ 
+ /* Options */
+ #define WE_EVENT_NETLINK	/* Propagate events using rtnetlink */
+@@ -72,7 +79,7 @@
+ 
+ /************************* GLOBAL VARIABLES *************************/
+ /*
+- * You should not use global variables, because or re-entrancy.
++ * You should not use global variables, because of re-entrancy.
+  * On our case, it's only const, so it's OK...
+  */
+ /*
+@@ -115,11 +122,11 @@ static const struct iw_ioctl_description
+ 	/* SIOCSIWSPY */
+ 	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct sockaddr), 0, IW_MAX_SPY, 0},
+ 	/* SIOCGIWSPY */
+-	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_GET_SPY, 0},
+-	/* -- hole -- */
+-	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+-	/* -- hole -- */
+-	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_SPY, 0},
++	/* SIOCSIWTHRSPY */
++	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct iw_thrspy), 1, 1, 0},
++	/* SIOCGIWTHRSPY */
++	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct iw_thrspy), 1, 1, 0},
+ 	/* SIOCSIWAP */
+ 	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWAP */
+@@ -377,9 +384,9 @@ int dev_get_wireless_info(char * buffer,
+ 	struct net_device *	dev;
+ 
+ 	size = sprintf(buffer,
+-		       "Inter-| sta-|   Quality        |   Discarded packets               | Missed\n"
+-		       " face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon\n"
+-			);
++		       "Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE\n"
++		       " face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | %d\n",
++		       WIRELESS_EXT);
+ 	
+ 	pos += size;
+ 	len += size;
+@@ -1023,4 +1030,253 @@ void wireless_send_event(struct net_devi
+ 	kfree(event);
+ 
+ 	return;		/* Always success, I guess ;-) */
++}
++
++/********************** ENHANCED IWSPY SUPPORT **********************/
++/*
++ * In the old days, the driver was handling spy support all by itself.
++ * Now, the driver can delegate this task to Wireless Extensions.
++ * It needs to use those standard spy iw_handler in struct iw_handler_def,
++ * push data to us via XXX and include struct iw_spy_data in its
++ * private part.
++ * One of the main advantage of centralising spy support here is that
++ * it becomes much easier to improve and extend it without having to touch
++ * the drivers. One example is the addition of the Spy-Threshold events.
++ * Note : IW_WIRELESS_SPY is defined in iw_handler.h
++ */
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : set Spy List
++ */
++int iw_handler_set_spy(struct net_device *	dev,
++		       struct iw_request_info *	info,
++		       union iwreq_data *	wrqu,
++		       char *			extra)
++{
++#ifdef IW_WIRELESS_SPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct sockaddr *	address = (struct sockaddr *) extra;
++
++	/* Disable spy collection while we copy the addresses.
++	 * As we don't disable interrupts, we need to do this to avoid races.
++	 * As we are the only writer, this is good enough. */
++	spydata->spy_number = 0;
++
++	/* Are there are addresses to copy? */
++	if(wrqu->data.length > 0) {
++		int i;
++
++		/* Copy addresses */
++		for(i = 0; i < wrqu->data.length; i++)
++			memcpy(spydata->spy_address[i], address[i].sa_data,
++			       ETH_ALEN);
++		/* Reset stats */
++		memset(spydata->spy_stat, 0,
++		       sizeof(struct iw_quality) * IW_MAX_SPY);
++
++#ifdef WE_SPY_DEBUG
++		printk(KERN_DEBUG "iw_handler_set_spy() :  offset %ld, spydata %p, num %d\n", dev->wireless_handlers->spy_offset, spydata, wrqu->data.length);
++		for (i = 0; i < wrqu->data.length; i++)
++			printk(KERN_DEBUG
++			       "%02X:%02X:%02X:%02X:%02X:%02X \n",
++			       spydata->spy_address[i][0],
++			       spydata->spy_address[i][1],
++			       spydata->spy_address[i][2],
++			       spydata->spy_address[i][3],
++			       spydata->spy_address[i][4],
++			       spydata->spy_address[i][5]);
++#endif	/* WE_SPY_DEBUG */
++	}
++	/* Enable addresses */
++	spydata->spy_number = wrqu->data.length;
++
++	return 0;
++#else /* IW_WIRELESS_SPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_SPY */
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : get Spy List
++ */
++int iw_handler_get_spy(struct net_device *	dev,
++		       struct iw_request_info *	info,
++		       union iwreq_data *	wrqu,
++		       char *			extra)
++{
++#ifdef IW_WIRELESS_SPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct sockaddr *	address = (struct sockaddr *) extra;
++	int			i;
++
++	wrqu->data.length = spydata->spy_number;
++
++	/* Copy addresses. */
++	for(i = 0; i < spydata->spy_number; i++) 	{
++		memcpy(address[i].sa_data, spydata->spy_address[i], ETH_ALEN);
++		address[i].sa_family = AF_UNIX;
++	}
++	/* Copy stats to the user buffer (just after). */
++	if(spydata->spy_number > 0)
++		memcpy(extra  + (sizeof(struct sockaddr) *spydata->spy_number),
++		       spydata->spy_stat,
++		       sizeof(struct iw_quality) * spydata->spy_number);
++	/* Reset updated flags. */
++	for(i = 0; i < spydata->spy_number; i++)
++		spydata->spy_stat[i].updated = 0;
++	return 0;
++#else /* IW_WIRELESS_SPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_SPY */
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : set spy threshold
++ */
++int iw_handler_set_thrspy(struct net_device *	dev,
++			  struct iw_request_info *info,
++			  union iwreq_data *	wrqu,
++			  char *		extra)
++{
++#ifdef IW_WIRELESS_THRSPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
++
++	/* Just do it */
++	memcpy(&(spydata->spy_thr_low), &(threshold->low),
++	       2 * sizeof(struct iw_quality));
++
++	/* Clear flag */
++	memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
++
++#ifdef WE_SPY_DEBUG
++	printk(KERN_DEBUG "iw_handler_set_thrspy() :  low %d ; high %d\n", spydata->spy_thr_low.level, spydata->spy_thr_high.level);
++#endif	/* WE_SPY_DEBUG */
++
++	return 0;
++#else /* IW_WIRELESS_THRSPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_THRSPY */
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : get spy threshold
++ */
++int iw_handler_get_thrspy(struct net_device *	dev,
++			  struct iw_request_info *info,
++			  union iwreq_data *	wrqu,
++			  char *		extra)
++{
++#ifdef IW_WIRELESS_THRSPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
++
++	/* Just do it */
++	memcpy(&(threshold->low), &(spydata->spy_thr_low),
++	       2 * sizeof(struct iw_quality));
++
++	return 0;
++#else /* IW_WIRELESS_THRSPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_THRSPY */
++}
++
++#ifdef IW_WIRELESS_THRSPY
++/*------------------------------------------------------------------*/
++/*
++ * Prepare and send a Spy Threshold event
++ */
++static void iw_send_thrspy_event(struct net_device *	dev,
++				 struct iw_spy_data *	spydata,
++				 unsigned char *	address,
++				 struct iw_quality *	wstats)
++{
++	union iwreq_data	wrqu;
++	struct iw_thrspy	threshold;
++
++	/* Init */
++	wrqu.data.length = 1;
++	wrqu.data.flags = 0;
++	/* Copy address */
++	memcpy(threshold.addr.sa_data, address, ETH_ALEN);
++	threshold.addr.sa_family = ARPHRD_ETHER;
++	/* Copy stats */
++	memcpy(&(threshold.qual), wstats, sizeof(struct iw_quality));
++	/* Copy also thresholds */
++	memcpy(&(threshold.low), &(spydata->spy_thr_low),
++	       2 * sizeof(struct iw_quality));
++
++#ifdef WE_SPY_DEBUG
++	printk(KERN_DEBUG "iw_send_thrspy_event() : address %02X:%02X:%02X:%02X:%02X:%02X, level %d, up = %d\n",
++	       threshold.addr.sa_data[0],
++	       threshold.addr.sa_data[1],
++	       threshold.addr.sa_data[2],
++	       threshold.addr.sa_data[3],
++	       threshold.addr.sa_data[4],
++	       threshold.addr.sa_data[5], threshold.qual.level);
++#endif	/* WE_SPY_DEBUG */
++
++	/* Send event to user space */
++	wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
++}
++#endif /* IW_WIRELESS_THRSPY */
++
++/* ---------------------------------------------------------------- */
++/*
++ * Call for the driver to update the spy data.
++ * For now, the spy data is a simple array. As the size of the array is
++ * small, this is good enough. If we wanted to support larger number of
++ * spy addresses, we should use something more efficient...
++ */
++void wireless_spy_update(struct net_device *	dev,
++			 unsigned char *	address,
++			 struct iw_quality *	wstats)
++{
++#ifdef IW_WIRELESS_SPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	int			i;
++	int			match = -1;
++
++#ifdef WE_SPY_DEBUG
++	printk(KERN_DEBUG "wireless_spy_update() :  offset %ld, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_handlers->spy_offset, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
++#endif	/* WE_SPY_DEBUG */
++
++	/* Update all records that match */
++	for(i = 0; i < spydata->spy_number; i++)
++		if(!memcmp(address, spydata->spy_address[i], ETH_ALEN)) {
++			memcpy(&(spydata->spy_stat[i]), wstats,
++			       sizeof(struct iw_quality));
++			match = i;
++		}
++#ifdef IW_WIRELESS_THRSPY
++	/* Generate an event if we cross the spy threshold.
++	 * To avoid event storms, we have a simple hysteresis : we generate
++	 * event only when we go under the low threshold or above the
++	 * high threshold. */
++	if(match >= 0) {
++		if(spydata->spy_thr_under[match]) {
++			if(wstats->level > spydata->spy_thr_high.level) {
++				spydata->spy_thr_under[match] = 0;
++				iw_send_thrspy_event(dev, spydata,
++						     address, wstats);
++			}
++		} else {
++			if(wstats->level < spydata->spy_thr_low.level) {
++				spydata->spy_thr_under[match] = 1;
++				iw_send_thrspy_event(dev, spydata,
++						     address, wstats);
++			}
++		}
++	}
++#endif /* IW_WIRELESS_THRSPY */
++#endif /* IW_WIRELESS_SPY */
+ }
+diff -u -p linux/net/netsyms.15.c linux/net/netsyms.c
+--- linux/net/netsyms.15.c	Fri Jan 10 16:56:32 2003
++++ linux/net/netsyms.c	Fri Jan 10 17:01:09 2003
+@@ -594,6 +594,11 @@ EXPORT_SYMBOL(softnet_data);
+ #if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
+ #include <net/iw_handler.h>
+ EXPORT_SYMBOL(wireless_send_event);
++EXPORT_SYMBOL(iw_handler_set_spy);
++EXPORT_SYMBOL(iw_handler_get_spy);
++EXPORT_SYMBOL(iw_handler_set_thrspy);
++EXPORT_SYMBOL(iw_handler_get_thrspy);
++EXPORT_SYMBOL(wireless_spy_update);
+ #endif /* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
+ 
+ #endif  /* CONFIG_NET */
diff --git a/recipes/linux/files/iw249_we16-6.diff b/recipes/linux/files/iw249_we16-6.diff
new file mode 100644
index 0000000000..0a5aaab954
--- /dev/null
+++ b/recipes/linux/files/iw249_we16-6.diff
@@ -0,0 +1,670 @@
+diff -u -p linux/include/linux/wireless.15.h linux/include/linux/wireless.h
+--- linux/include/linux/wireless.15.h	2004-11-05 14:59:33.000000000 -0800
++++ linux/include/linux/wireless.h	2004-11-05 15:00:42.000000000 -0800
+@@ -1,7 +1,7 @@
+ /*
+  * This file define a set of standard wireless extensions
+  *
+- * Version :	15	12.7.02
++ * Version :	16	2.4.03
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+  * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
+@@ -69,6 +69,8 @@
+ 
+ /***************************** INCLUDES *****************************/
+ 
++/* To minimise problems in user space, I might remove those headers
++ * at some point. Jean II */
+ #include <linux/types.h>		/* for "caddr_t" et al		*/
+ #include <linux/socket.h>		/* for "struct sockaddr" et al	*/
+ #include <linux/if.h>			/* for IFNAMSIZ and co... */
+@@ -80,7 +82,7 @@
+  * (there is some stuff that will be added in the future...)
+  * I just plan to increment with each new version.
+  */
+-#define WIRELESS_EXT	15
++#define WIRELESS_EXT	16
+ 
+ /*
+  * Changes :
+@@ -163,6 +165,16 @@
+  *	- Add IW_TXPOW_RANGE for range of Tx Powers
+  *	- Add IWEVREGISTERED & IWEVEXPIRED events for Access Points
+  *	- Add IW_MODE_MONITOR for passive monitor
++ *
++ * V15 to V16
++ * ----------
++ *	- Increase the number of bitrates in iw_range to 32 (for 802.11g)
++ *	- Increase the number of frequencies in iw_range to 32 (for 802.11b+a)
++ *	- Reshuffle struct iw_range for increases, add filler
++ *	- Increase IW_MAX_AP to 64 for driver returning a lot of addresses
++ *	- Remove IW_MAX_GET_SPY because conflict with enhanced spy support
++ *	- Add SIOCSIWTHRSPY/SIOCGIWTHRSPY and "struct iw_thrspy"
++ *	- Add IW_ENCODE_TEMP and iw_range->encoding_login_index
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+@@ -196,9 +208,11 @@
+ /* SIOCGIWSTATS is strictly used between user space and the kernel, and
+  * is never passed to the driver (i.e. the driver will never see it). */
+ 
+-/* Mobile IP support (statistics per MAC address) */
++/* Spy support (statistics per MAC address - used for Mobile IP support) */
+ #define SIOCSIWSPY	0x8B10		/* set spy addresses */
+ #define SIOCGIWSPY	0x8B11		/* get spy info (quality of link) */
++#define SIOCSIWTHRSPY	0x8B12		/* set spy threshold (spy event) */
++#define SIOCGIWTHRSPY	0x8B13		/* get spy threshold */
+ 
+ /* Access Point manipulation */
+ #define SIOCSIWAP	0x8B14		/* set access point MAC addresses */
+@@ -294,7 +308,7 @@
+ #define IW_PRIV_TYPE_FLOAT	0x5000	/* struct iw_freq */
+ #define IW_PRIV_TYPE_ADDR	0x6000	/* struct sockaddr */
+ 
+-#define IW_PRIV_SIZE_FIXED	0x0800	/* Variable or fixed nuber of args */
++#define IW_PRIV_SIZE_FIXED	0x0800	/* Variable or fixed number of args */
+ 
+ #define IW_PRIV_SIZE_MASK	0x07FF	/* Max number of those args */
+ 
+@@ -306,13 +320,13 @@
+ /* ----------------------- OTHER CONSTANTS ----------------------- */
+ 
+ /* Maximum frequencies in the range struct */
+-#define IW_MAX_FREQUENCIES	16
++#define IW_MAX_FREQUENCIES	32
+ /* Note : if you have something like 80 frequencies,
+  * don't increase this constant and don't fill the frequency list.
+  * The user will be able to set by channel anyway... */
+ 
+ /* Maximum bit rates in the range struct */
+-#define IW_MAX_BITRATES		8
++#define IW_MAX_BITRATES		32
+ 
+ /* Maximum tx powers in the range struct */
+ #define IW_MAX_TXPOWER		8
+@@ -320,8 +334,7 @@
+  * a few of them in the struct iw_range. */
+ 
+ /* Maximum of address that you may set with SPY */
+-#define IW_MAX_SPY		8	/* set */
+-#define IW_MAX_GET_SPY		64	/* get */
++#define IW_MAX_SPY		8
+ 
+ /* Maximum of address that you may get in the
+    list of access points in range */
+@@ -354,7 +367,8 @@
+ #define IW_ENCODE_ENABLED	0x0000	/* Encoding enabled */
+ #define IW_ENCODE_RESTRICTED	0x4000	/* Refuse non-encoded packets */
+ #define IW_ENCODE_OPEN		0x2000	/* Accept non-encoded packets */
+-#define IW_ENCODE_NOKEY         0x0800  /* Key is write only, so not present */
++#define IW_ENCODE_NOKEY		0x0800  /* Key is write only, so not present */
++#define IW_ENCODE_TEMP		0x0400  /* Temporary key */
+ 
+ /* Power management flags available (along with the value, if any) */
+ #define IW_POWER_ON		0x0000	/* No details... */
+@@ -482,6 +496,17 @@ struct	iw_missed
+ 	__u32		beacon;		/* Missed beacons/superframe */
+ };
+ 
++/*
++ *	Quality range (for spy threshold)
++ */
++struct	iw_thrspy
++{
++	struct sockaddr		addr;		/* Source address (hw/mac) */
++	struct iw_quality	qual;		/* Quality of the link */
++	struct iw_quality	low;		/* Low threshold */
++	struct iw_quality	high;		/* High threshold */
++};
++
+ /* ------------------------ WIRELESS STATS ------------------------ */
+ /*
+  * Wireless statistics (used for /proc/net/wireless)
+@@ -534,7 +559,7 @@ union	iwreq_data
+ 	struct iw_quality qual;		/* Quality part of statistics */
+ 
+ 	struct sockaddr	ap_addr;	/* Access point address */
+-	struct sockaddr	addr;		/* Destination address (hw) */
++	struct sockaddr	addr;		/* Destination address (hw/mac) */
+ 
+ 	struct iw_param	param;		/* Other small parameters */
+ 	struct iw_point	data;		/* Other large parameters */
+@@ -582,17 +607,31 @@ struct	iw_range
+ 	__u32		min_nwid;	/* Minimal NWID we are able to set */
+ 	__u32		max_nwid;	/* Maximal NWID we are able to set */
+ 
+-	/* Frequency */
+-	__u16		num_channels;	/* Number of channels [0; num - 1] */
+-	__u8		num_frequency;	/* Number of entry in the list */
+-	struct iw_freq	freq[IW_MAX_FREQUENCIES];	/* list */
+-	/* Note : this frequency list doesn't need to fit channel numbers */
++	/* Old Frequency (backward compat - moved lower ) */
++	__u16		old_num_channels;
++	__u8		old_num_frequency;
++	/* Filler to keep "version" at the same offset */
++	__s32		old_freq[6];
+ 
+ 	/* signal level threshold range */
+ 	__s32	sensitivity;
+ 
+ 	/* Quality of link & SNR stuff */
++	/* Quality range (link, level, noise)
++	 * If the quality is absolute, it will be in the range [0 ; max_qual],
++	 * if the quality is dBm, it will be in the range [max_qual ; 0].
++	 * Don't forget that we use 8 bit arithmetics... */
+ 	struct iw_quality	max_qual;	/* Quality of the link */
++	/* This should contain the average/typical values of the quality
++	 * indicator. This should be the threshold between a "good" and
++	 * a "bad" link (example : monitor going from green to orange).
++	 * Currently, user space apps like quality monitors don't have any
++	 * way to calibrate the measurement. With this, they can split
++	 * the range between 0 and max_qual in different quality level
++	 * (using a geometric subdivision centered on the average).
++	 * I expect that people doing the user space apps will feedback
++	 * us on which value we need to put in each driver... */
++	struct iw_quality	avg_qual;	/* Quality of the link */
+ 
+ 	/* Rates */
+ 	__u8		num_bitrates;	/* Number of entries in the list */
+@@ -619,6 +658,8 @@ struct	iw_range
+ 	__u16	encoding_size[IW_MAX_ENCODING_SIZES];	/* Different token sizes */
+ 	__u8	num_encoding_sizes;	/* Number of entry in the list */
+ 	__u8	max_encoding_tokens;	/* Max number of tokens */
++	/* For drivers that need a "login/passwd" form */
++	__u8	encoding_login_index;	/* token index for login token */
+ 
+ 	/* Transmit power */
+ 	__u16		txpower_capa;	/* What options are supported */
+@@ -638,18 +679,12 @@ struct	iw_range
+ 	__s32		min_r_time;	/* Minimal retry lifetime */
+ 	__s32		max_r_time;	/* Maximal retry lifetime */
+ 
+-	/* Average quality of link & SNR */
+-	struct iw_quality	avg_qual;	/* Quality of the link */
+-	/* This should contain the average/typical values of the quality
+-	 * indicator. This should be the threshold between a "good" and
+-	 * a "bad" link (example : monitor going from green to orange).
+-	 * Currently, user space apps like quality monitors don't have any
+-	 * way to calibrate the measurement. With this, they can split
+-	 * the range between 0 and max_qual in different quality level
+-	 * (using a geometric subdivision centered on the average).
+-	 * I expect that people doing the user space apps will feedback
+-	 * us on which value we need to put in each driver...
+-	 */
++	/* Frequency */
++	__u16		num_channels;	/* Number of channels [0; num - 1] */
++	__u8		num_frequency;	/* Number of entry in the list */
++	struct iw_freq	freq[IW_MAX_FREQUENCIES];	/* list */
++	/* Note : this frequency list doesn't need to fit channel numbers,
++	 * because each entry contain its channel index */
+ };
+ 
+ /*
+diff -u -p linux/include/net/iw_handler.15.h linux/include/net/iw_handler.h
+--- linux/include/net/iw_handler.15.h	2004-11-05 14:59:47.000000000 -0800
++++ linux/include/net/iw_handler.h	2004-11-05 15:00:42.000000000 -0800
+@@ -1,7 +1,7 @@
+ /*
+  * This file define the new driver API for Wireless Extensions
+  *
+- * Version :	4	21.6.02
++ * Version :	5	4.12.02
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+  * Copyright (c) 2001-2002 Jean Tourrilhes, All Rights Reserved.
+@@ -206,7 +206,7 @@
+  * will be needed...
+  * I just plan to increment with each new version.
+  */
+-#define IW_HANDLER_VERSION	4
++#define IW_HANDLER_VERSION	5
+ 
+ /*
+  * Changes :
+@@ -220,10 +220,18 @@
+  * V3 to V4
+  * --------
+  *	- Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
++ *
++ * V4 to V5
++ * --------
++ *	- Add new spy support : struct iw_spy_data & prototypes
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+ 
++/* Enable enhanced spy support. Disable to reduce footprint */
++#define IW_WIRELESS_SPY
++#define IW_WIRELESS_THRSPY
++
+ /* Special error message for the driver to indicate that we
+  * should do a commit after return from the iw_handler */
+ #define EIWCOMMIT	EINPROGRESS
+@@ -315,6 +323,9 @@ struct iw_handler_def
+ 	 * We will automatically export that to user space... */
+ 	struct iw_priv_args *	private_args;
+ 
++	/* Driver enhanced spy support */
++	long			spy_offset;	/* Spy data offset */
++
+ 	/* In the long term, get_wireless_stats will move from
+ 	 * 'struct net_device' to here, to minimise bloat. */
+ };
+@@ -350,6 +361,33 @@ struct iw_ioctl_description
+ 
+ /* Need to think of short header translation table. Later. */
+ 
++/* --------------------- ENHANCED SPY SUPPORT --------------------- */
++/*
++ * In the old days, the driver was handling spy support all by itself.
++ * Now, the driver can delegate this task to Wireless Extensions.
++ * It needs to include this struct in its private part and use the
++ * standard spy iw_handler.
++ */
++
++/*
++ * Instance specific spy data, i.e. addresses spied and quality for them.
++ */
++struct iw_spy_data
++{
++#ifdef IW_WIRELESS_SPY
++	/* --- Standard spy support --- */
++	int			spy_number;
++	u_char			spy_address[IW_MAX_SPY][ETH_ALEN];
++	struct iw_quality	spy_stat[IW_MAX_SPY];
++#ifdef IW_WIRELESS_THRSPY
++	/* --- Enhanced spy support (event) */
++	struct iw_quality	spy_thr_low;	/* Low threshold */
++	struct iw_quality	spy_thr_high;	/* High threshold */
++	u_char			spy_thr_under[IW_MAX_SPY];
++#endif /* IW_WIRELESS_THRSPY */
++#endif /* IW_WIRELESS_SPY */
++};
++
+ /**************************** PROTOTYPES ****************************/
+ /*
+  * Functions part of the Wireless Extensions (defined in net/core/wireless.c).
+@@ -376,6 +414,31 @@ extern void wireless_send_event(struct n
+ /* We may need a function to send a stream of events to user space.
+  * More on that later... */
+ 
++/* Standard handler for SIOCSIWSPY */
++extern int iw_handler_set_spy(struct net_device *	dev,
++			      struct iw_request_info *	info,
++			      union iwreq_data *	wrqu,
++			      char *			extra);
++/* Standard handler for SIOCGIWSPY */
++extern int iw_handler_get_spy(struct net_device *	dev,
++			      struct iw_request_info *	info,
++			      union iwreq_data *	wrqu,
++			      char *			extra);
++/* Standard handler for SIOCSIWTHRSPY */
++extern int iw_handler_set_thrspy(struct net_device *	dev,
++				 struct iw_request_info *info,
++				 union iwreq_data *	wrqu,
++				 char *			extra);
++/* Standard handler for SIOCGIWTHRSPY */
++extern int iw_handler_get_thrspy(struct net_device *	dev,
++				 struct iw_request_info *info,
++				 union iwreq_data *	wrqu,
++				 char *			extra);
++/* Driver call to update spy records */
++extern void wireless_spy_update(struct net_device *	dev,
++				unsigned char *		address,
++				struct iw_quality *	wstats);
++
+ /************************* INLINE FUNTIONS *************************/
+ /*
+  * Function that are so simple that it's more efficient inlining them
+diff -u -p linux/net/core/wireless.15.c linux/net/core/wireless.c
+--- linux/net/core/wireless.15.c	2004-11-05 15:00:11.000000000 -0800
++++ linux/net/core/wireless.c	2004-11-05 15:00:42.000000000 -0800
+@@ -2,7 +2,7 @@
+  * This file implement the Wireless Extensions APIs.
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2003 Jean Tourrilhes, All Rights Reserved.
+  *
+  * (As all part of the Linux kernel, this file is GPL)
+  */
+@@ -43,6 +43,11 @@
+  *	o Turn on WE_STRICT_WRITE by default + kernel warning
+  *	o Fix WE_STRICT_WRITE in ioctl_export_private() (32 => iw_num)
+  *	o Fix off-by-one in test (extra_size <= IFNAMSIZ)
++ *
++ * v6 - 9.01.03 - Jean II
++ *	o Add common spy support : iw_handler_set_spy(), wireless_spy_update()
++ *	o Add enhanced spy support : iw_handler_set_thrspy() and event.
++ *	o Add WIRELESS_EXT version display in /proc/net/wireless
+  */
+ 
+ /***************************** INCLUDES *****************************/
+@@ -52,6 +57,7 @@
+ #include <linux/types.h>		/* off_t */
+ #include <linux/netdevice.h>		/* struct ifreq, dev_get_by_name() */
+ #include <linux/rtnetlink.h>		/* rtnetlink stuff */
++#include <linux/if_arp.h>		/* ARPHRD_ETHER */
+ 
+ #include <linux/wireless.h>		/* Pretty obvious */
+ #include <net/iw_handler.h>		/* New driver API */
+@@ -65,6 +71,7 @@
+ /* Debuging stuff */
+ #undef WE_IOCTL_DEBUG		/* Debug IOCTL API */
+ #undef WE_EVENT_DEBUG		/* Debug Event dispatcher */
++#undef WE_SPY_DEBUG		/* Debug enhanced spy support */
+ 
+ /* Options */
+ #define WE_EVENT_NETLINK	/* Propagate events using rtnetlink */
+@@ -72,7 +79,7 @@
+ 
+ /************************* GLOBAL VARIABLES *************************/
+ /*
+- * You should not use global variables, because or re-entrancy.
++ * You should not use global variables, because of re-entrancy.
+  * On our case, it's only const, so it's OK...
+  */
+ /*
+@@ -115,11 +122,11 @@ static const struct iw_ioctl_description
+ 	/* SIOCSIWSPY */
+ 	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct sockaddr), 0, IW_MAX_SPY, 0},
+ 	/* SIOCGIWSPY */
+-	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_GET_SPY, 0},
+-	/* -- hole -- */
+-	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+-	/* -- hole -- */
+-	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_SPY, 0},
++	/* SIOCSIWTHRSPY */
++	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct iw_thrspy), 1, 1, 0},
++	/* SIOCGIWTHRSPY */
++	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct iw_thrspy), 1, 1, 0},
+ 	/* SIOCSIWAP */
+ 	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWAP */
+@@ -377,9 +384,9 @@ int dev_get_wireless_info(char * buffer,
+ 	struct net_device *	dev;
+ 
+ 	size = sprintf(buffer,
+-		       "Inter-| sta-|   Quality        |   Discarded packets               | Missed\n"
+-		       " face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon\n"
+-			);
++		       "Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE\n"
++		       " face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | %d\n",
++		       WIRELESS_EXT);
+ 	
+ 	pos += size;
+ 	len += size;
+@@ -1024,3 +1031,252 @@ void wireless_send_event(struct net_devi
+ 
+ 	return;		/* Always success, I guess ;-) */
+ }
++
++/********************** ENHANCED IWSPY SUPPORT **********************/
++/*
++ * In the old days, the driver was handling spy support all by itself.
++ * Now, the driver can delegate this task to Wireless Extensions.
++ * It needs to use those standard spy iw_handler in struct iw_handler_def,
++ * push data to us via XXX and include struct iw_spy_data in its
++ * private part.
++ * One of the main advantage of centralising spy support here is that
++ * it becomes much easier to improve and extend it without having to touch
++ * the drivers. One example is the addition of the Spy-Threshold events.
++ * Note : IW_WIRELESS_SPY is defined in iw_handler.h
++ */
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : set Spy List
++ */
++int iw_handler_set_spy(struct net_device *	dev,
++		       struct iw_request_info *	info,
++		       union iwreq_data *	wrqu,
++		       char *			extra)
++{
++#ifdef IW_WIRELESS_SPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct sockaddr *	address = (struct sockaddr *) extra;
++
++	/* Disable spy collection while we copy the addresses.
++	 * As we don't disable interrupts, we need to do this to avoid races.
++	 * As we are the only writer, this is good enough. */
++	spydata->spy_number = 0;
++
++	/* Are there are addresses to copy? */
++	if(wrqu->data.length > 0) {
++		int i;
++
++		/* Copy addresses */
++		for(i = 0; i < wrqu->data.length; i++)
++			memcpy(spydata->spy_address[i], address[i].sa_data,
++			       ETH_ALEN);
++		/* Reset stats */
++		memset(spydata->spy_stat, 0,
++		       sizeof(struct iw_quality) * IW_MAX_SPY);
++
++#ifdef WE_SPY_DEBUG
++		printk(KERN_DEBUG "iw_handler_set_spy() :  offset %ld, spydata %p, num %d\n", dev->wireless_handlers->spy_offset, spydata, wrqu->data.length);
++		for (i = 0; i < wrqu->data.length; i++)
++			printk(KERN_DEBUG
++			       "%02X:%02X:%02X:%02X:%02X:%02X \n",
++			       spydata->spy_address[i][0],
++			       spydata->spy_address[i][1],
++			       spydata->spy_address[i][2],
++			       spydata->spy_address[i][3],
++			       spydata->spy_address[i][4],
++			       spydata->spy_address[i][5]);
++#endif	/* WE_SPY_DEBUG */
++	}
++	/* Enable addresses */
++	spydata->spy_number = wrqu->data.length;
++
++	return 0;
++#else /* IW_WIRELESS_SPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_SPY */
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : get Spy List
++ */
++int iw_handler_get_spy(struct net_device *	dev,
++		       struct iw_request_info *	info,
++		       union iwreq_data *	wrqu,
++		       char *			extra)
++{
++#ifdef IW_WIRELESS_SPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct sockaddr *	address = (struct sockaddr *) extra;
++	int			i;
++
++	wrqu->data.length = spydata->spy_number;
++
++	/* Copy addresses. */
++	for(i = 0; i < spydata->spy_number; i++) 	{
++		memcpy(address[i].sa_data, spydata->spy_address[i], ETH_ALEN);
++		address[i].sa_family = AF_UNIX;
++	}
++	/* Copy stats to the user buffer (just after). */
++	if(spydata->spy_number > 0)
++		memcpy(extra  + (sizeof(struct sockaddr) *spydata->spy_number),
++		       spydata->spy_stat,
++		       sizeof(struct iw_quality) * spydata->spy_number);
++	/* Reset updated flags. */
++	for(i = 0; i < spydata->spy_number; i++)
++		spydata->spy_stat[i].updated = 0;
++	return 0;
++#else /* IW_WIRELESS_SPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_SPY */
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : set spy threshold
++ */
++int iw_handler_set_thrspy(struct net_device *	dev,
++			  struct iw_request_info *info,
++			  union iwreq_data *	wrqu,
++			  char *		extra)
++{
++#ifdef IW_WIRELESS_THRSPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
++
++	/* Just do it */
++	memcpy(&(spydata->spy_thr_low), &(threshold->low),
++	       2 * sizeof(struct iw_quality));
++
++	/* Clear flag */
++	memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
++
++#ifdef WE_SPY_DEBUG
++	printk(KERN_DEBUG "iw_handler_set_thrspy() :  low %d ; high %d\n", spydata->spy_thr_low.level, spydata->spy_thr_high.level);
++#endif	/* WE_SPY_DEBUG */
++
++	return 0;
++#else /* IW_WIRELESS_THRSPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_THRSPY */
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Standard Wireless Handler : get spy threshold
++ */
++int iw_handler_get_thrspy(struct net_device *	dev,
++			  struct iw_request_info *info,
++			  union iwreq_data *	wrqu,
++			  char *		extra)
++{
++#ifdef IW_WIRELESS_THRSPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
++
++	/* Just do it */
++	memcpy(&(threshold->low), &(spydata->spy_thr_low),
++	       2 * sizeof(struct iw_quality));
++
++	return 0;
++#else /* IW_WIRELESS_THRSPY */
++	return -EOPNOTSUPP;
++#endif /* IW_WIRELESS_THRSPY */
++}
++
++#ifdef IW_WIRELESS_THRSPY
++/*------------------------------------------------------------------*/
++/*
++ * Prepare and send a Spy Threshold event
++ */
++static void iw_send_thrspy_event(struct net_device *	dev,
++				 struct iw_spy_data *	spydata,
++				 unsigned char *	address,
++				 struct iw_quality *	wstats)
++{
++	union iwreq_data	wrqu;
++	struct iw_thrspy	threshold;
++
++	/* Init */
++	wrqu.data.length = 1;
++	wrqu.data.flags = 0;
++	/* Copy address */
++	memcpy(threshold.addr.sa_data, address, ETH_ALEN);
++	threshold.addr.sa_family = ARPHRD_ETHER;
++	/* Copy stats */
++	memcpy(&(threshold.qual), wstats, sizeof(struct iw_quality));
++	/* Copy also thresholds */
++	memcpy(&(threshold.low), &(spydata->spy_thr_low),
++	       2 * sizeof(struct iw_quality));
++
++#ifdef WE_SPY_DEBUG
++	printk(KERN_DEBUG "iw_send_thrspy_event() : address %02X:%02X:%02X:%02X:%02X:%02X, level %d, up = %d\n",
++	       threshold.addr.sa_data[0],
++	       threshold.addr.sa_data[1],
++	       threshold.addr.sa_data[2],
++	       threshold.addr.sa_data[3],
++	       threshold.addr.sa_data[4],
++	       threshold.addr.sa_data[5], threshold.qual.level);
++#endif	/* WE_SPY_DEBUG */
++
++	/* Send event to user space */
++	wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
++}
++#endif /* IW_WIRELESS_THRSPY */
++
++/* ---------------------------------------------------------------- */
++/*
++ * Call for the driver to update the spy data.
++ * For now, the spy data is a simple array. As the size of the array is
++ * small, this is good enough. If we wanted to support larger number of
++ * spy addresses, we should use something more efficient...
++ */
++void wireless_spy_update(struct net_device *	dev,
++			 unsigned char *	address,
++			 struct iw_quality *	wstats)
++{
++#ifdef IW_WIRELESS_SPY
++	struct iw_spy_data *	spydata = (dev->priv +
++					   dev->wireless_handlers->spy_offset);
++	int			i;
++	int			match = -1;
++
++#ifdef WE_SPY_DEBUG
++	printk(KERN_DEBUG "wireless_spy_update() :  offset %ld, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_handlers->spy_offset, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
++#endif	/* WE_SPY_DEBUG */
++
++	/* Update all records that match */
++	for(i = 0; i < spydata->spy_number; i++)
++		if(!memcmp(address, spydata->spy_address[i], ETH_ALEN)) {
++			memcpy(&(spydata->spy_stat[i]), wstats,
++			       sizeof(struct iw_quality));
++			match = i;
++		}
++#ifdef IW_WIRELESS_THRSPY
++	/* Generate an event if we cross the spy threshold.
++	 * To avoid event storms, we have a simple hysteresis : we generate
++	 * event only when we go under the low threshold or above the
++	 * high threshold. */
++	if(match >= 0) {
++		if(spydata->spy_thr_under[match]) {
++			if(wstats->level > spydata->spy_thr_high.level) {
++				spydata->spy_thr_under[match] = 0;
++				iw_send_thrspy_event(dev, spydata,
++						     address, wstats);
++			}
++		} else {
++			if(wstats->level < spydata->spy_thr_low.level) {
++				spydata->spy_thr_under[match] = 1;
++				iw_send_thrspy_event(dev, spydata,
++						     address, wstats);
++			}
++		}
++	}
++#endif /* IW_WIRELESS_THRSPY */
++#endif /* IW_WIRELESS_SPY */
++}
+diff -u -p linux/net/netsyms.15.c linux/net/netsyms.c
+--- linux/net/netsyms.15.c	2004-11-05 15:00:25.000000000 -0800
++++ linux/net/netsyms.c	2004-11-05 15:01:38.000000000 -0800
+@@ -589,9 +589,13 @@ EXPORT_SYMBOL(net_call_rx_atomic);
+ EXPORT_SYMBOL(softnet_data);
+ 
+ #if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
+-/* Don't include the whole header mess for a single function */
+-extern void wireless_send_event(struct net_device *dev, unsigned int cmd, union iwreq_data *wrqu, char *extra);
++#include <net/iw_handler.h>
+ EXPORT_SYMBOL(wireless_send_event);
++EXPORT_SYMBOL(iw_handler_set_spy);
++EXPORT_SYMBOL(iw_handler_get_spy);
++EXPORT_SYMBOL(iw_handler_set_thrspy);
++EXPORT_SYMBOL(iw_handler_get_thrspy);
++EXPORT_SYMBOL(wireless_spy_update);
+ #endif	/* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
+ 
+ #endif  /* CONFIG_NET */
diff --git a/recipes/linux/files/iw249_we17-13.diff b/recipes/linux/files/iw249_we17-13.diff
new file mode 100644
index 0000000000..674f4ffbc0
--- /dev/null
+++ b/recipes/linux/files/iw249_we17-13.diff
@@ -0,0 +1,768 @@
+diff -u -p linux/include/linux/netdevice.we16.h linux/include/linux/netdevice.h
+--- linux/include/linux/netdevice.we16.h	2005-02-03 14:54:56.000000000 -0800
++++ linux/include/linux/netdevice.h	2005-02-03 15:43:30.000000000 -0800
+@@ -295,7 +295,9 @@ struct net_device
+ 
+ 	/* List of functions to handle Wireless Extensions (instead of ioctl).
+ 	 * See <net/iw_handler.h> for details. Jean II */
+-	struct iw_handler_def *	wireless_handlers;
++	const struct iw_handler_def *	wireless_handlers;
++	/* Instance data managed by the core of Wireless Extensions. */
++	struct iw_public_data *	wireless_data;
+ 
+ 	struct ethtool_ops *ethtool_ops;
+ 
+diff -u -p linux/include/linux/wireless.we16.h linux/include/linux/wireless.h
+--- linux/include/linux/wireless.we16.h	2005-02-03 14:55:04.000000000 -0800
++++ linux/include/linux/wireless.h	2005-02-03 15:44:48.000000000 -0800
+@@ -1,10 +1,10 @@
+ /*
+  * This file define a set of standard wireless extensions
+  *
+- * Version :	16	2.4.03
++ * Version :	17	21.6.04
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2004 Jean Tourrilhes, All Rights Reserved.
+  */
+ 
+ #ifndef _LINUX_WIRELESS_H
+@@ -47,12 +47,12 @@
+  *	# include/net/iw_handler.h
+  *
+  * Note as well that /proc/net/wireless implementation has now moved in :
+- *	# include/linux/wireless.c
++ *	# net/core/wireless.c
+  *
+  * Wireless Events (2002 -> onward) :
+  * --------------------------------
+  * Events are defined at the end of this file, and implemented in :
+- *	# include/linux/wireless.c
++ *	# net/core/wireless.c
+  *
+  * Other comments :
+  * --------------
+@@ -82,7 +82,7 @@
+  * (there is some stuff that will be added in the future...)
+  * I just plan to increment with each new version.
+  */
+-#define WIRELESS_EXT	16
++#define WIRELESS_EXT	17
+ 
+ /*
+  * Changes :
+@@ -175,6 +175,13 @@
+  *	- Remove IW_MAX_GET_SPY because conflict with enhanced spy support
+  *	- Add SIOCSIWTHRSPY/SIOCGIWTHRSPY and "struct iw_thrspy"
+  *	- Add IW_ENCODE_TEMP and iw_range->encoding_login_index
++ *
++ * V16 to V17
++ * ----------
++ *	- Add flags to frequency -> auto/fixed
++ *	- Document (struct iw_quality *)->updated, add new flags (INVALID)
++ *	- Wireless Event capability in struct iw_range
++ *	- Add support for relative TxPower (yick !)
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+@@ -251,7 +258,7 @@
+ 
+ /* -------------------- DEV PRIVATE IOCTL LIST -------------------- */
+ 
+-/* These 16 ioctl are wireless device private.
++/* These 32 ioctl are wireless device private, for 16 commands.
+  * Each driver is free to use them for whatever purpose it chooses,
+  * however the driver *must* export the description of those ioctls
+  * with SIOCGIWPRIV and *must* use arguments as defined below.
+@@ -266,8 +273,8 @@
+  * We now have 32 commands, so a bit more space ;-).
+  * Also, all 'odd' commands are only usable by root and don't return the
+  * content of ifr/iwr to user (but you are not obliged to use the set/get
+- * convention, just use every other two command).
+- * And I repeat : you are not obliged to use them with iwspy, but you
++ * convention, just use every other two command). More details in iwpriv.c.
++ * And I repeat : you are not forced to use them with iwpriv, but you
+  * must be compliant with it.
+  */
+ 
+@@ -352,6 +359,18 @@
+ #define IW_MODE_SECOND	5	/* Secondary master/repeater (backup) */
+ #define IW_MODE_MONITOR	6	/* Passive monitor (listen only) */
+ 
++/* Statistics flags (bitmask in updated) */
++#define IW_QUAL_QUAL_UPDATED	0x1	/* Value was updated since last read */
++#define IW_QUAL_LEVEL_UPDATED	0x2
++#define IW_QUAL_NOISE_UPDATED	0x4
++#define IW_QUAL_QUAL_INVALID	0x10	/* Driver doesn't provide value */
++#define IW_QUAL_LEVEL_INVALID	0x20
++#define IW_QUAL_NOISE_INVALID	0x40
++
++/* Frequency flags */
++#define IW_FREQ_AUTO		0x00	/* Let the driver decides */
++#define IW_FREQ_FIXED		0x01	/* Force a specific value */
++
+ /* Maximum number of size of encoding token available
+  * they are listed in the range structure */
+ #define IW_MAX_ENCODING_SIZES	8
+@@ -390,6 +409,7 @@
+ #define IW_TXPOW_TYPE		0x00FF	/* Type of value */
+ #define IW_TXPOW_DBM		0x0000	/* Value is in dBm */
+ #define IW_TXPOW_MWATT		0x0001	/* Value is in mW */
++#define IW_TXPOW_RELATIVE	0x0002	/* Value is in arbitrary units */
+ #define IW_TXPOW_RANGE		0x1000	/* Range of value between min/max */
+ 
+ /* Retry limits and lifetime flags available */
+@@ -418,6 +438,25 @@
+ /* Max number of char in custom event - use multiple of them if needed */
+ #define IW_CUSTOM_MAX		256	/* In bytes */
+ 
++/* Event capability macros - in (struct iw_range *)->event_capa
++ * Because we have more than 32 possible events, we use an array of
++ * 32 bit bitmasks. Note : 32 bits = 0x20 = 2^5. */
++#define IW_EVENT_CAPA_BASE(cmd)		((cmd >= SIOCIWFIRSTPRIV) ? \
++					 (cmd - SIOCIWFIRSTPRIV + 0x60) : \
++					 (cmd - SIOCSIWCOMMIT))
++#define IW_EVENT_CAPA_INDEX(cmd)	(IW_EVENT_CAPA_BASE(cmd) >> 5)
++#define IW_EVENT_CAPA_MASK(cmd)		(1 << (IW_EVENT_CAPA_BASE(cmd) & 0x1F))
++/* Event capability constants - event autogenerated by the kernel
++ * This list is valid for most 802.11 devices, customise as needed... */
++#define IW_EVENT_CAPA_K_0	(IW_EVENT_CAPA_MASK(0x8B04) | \
++				 IW_EVENT_CAPA_MASK(0x8B06) | \
++				 IW_EVENT_CAPA_MASK(0x8B1A))
++#define IW_EVENT_CAPA_K_1	(IW_EVENT_CAPA_MASK(0x8B2A))
++/* "Easy" macro to set events in iw_range (less efficient) */
++#define IW_EVENT_CAPA_SET(event_capa, cmd) (event_capa[IW_EVENT_CAPA_INDEX(cmd)] |= IW_EVENT_CAPA_MASK(cmd))
++#define IW_EVENT_CAPA_SET_KERNEL(event_capa) {event_capa[0] |= IW_EVENT_CAPA_K_0; event_capa[1] |= IW_EVENT_CAPA_K_1; }
++
++
+ /****************************** TYPES ******************************/
+ 
+ /* --------------------------- SUBTYPES --------------------------- */
+@@ -456,7 +495,7 @@ struct	iw_freq
+ 	__s32		m;		/* Mantissa */
+ 	__s16		e;		/* Exponent */
+ 	__u8		i;		/* List index (when in range struct) */
+-	__u8		pad;		/* Unused - just for alignement */
++	__u8		flags;		/* Flags (fixed/auto) */
+ };
+ 
+ /*
+@@ -610,11 +649,12 @@ struct	iw_range
+ 	/* Old Frequency (backward compat - moved lower ) */
+ 	__u16		old_num_channels;
+ 	__u8		old_num_frequency;
+-	/* Filler to keep "version" at the same offset */
+-	__s32		old_freq[6];
++
++	/* Wireless event capability bitmasks */
++	__u32		event_capa[6];
+ 
+ 	/* signal level threshold range */
+-	__s32	sensitivity;
++	__s32		sensitivity;
+ 
+ 	/* Quality of link & SNR stuff */
+ 	/* Quality range (link, level, noise)
+diff -u -p linux/include/net/iw_handler.we16.h linux/include/net/iw_handler.h
+--- linux/include/net/iw_handler.we16.h	2005-02-03 14:55:26.000000000 -0800
++++ linux/include/net/iw_handler.h	2005-02-03 15:47:04.000000000 -0800
+@@ -1,10 +1,10 @@
+ /*
+  * This file define the new driver API for Wireless Extensions
+  *
+- * Version :	5	4.12.02
++ * Version :	6	21.6.04
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 2001-2002 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 2001-2004 Jean Tourrilhes, All Rights Reserved.
+  */
+ 
+ #ifndef _IW_HANDLER_H
+@@ -206,7 +206,7 @@
+  * will be needed...
+  * I just plan to increment with each new version.
+  */
+-#define IW_HANDLER_VERSION	5
++#define IW_HANDLER_VERSION	6
+ 
+ /*
+  * Changes :
+@@ -224,11 +224,18 @@
+  * V4 to V5
+  * --------
+  *	- Add new spy support : struct iw_spy_data & prototypes
++ *
++ * V5 to V6
++ * --------
++ *	- Change the way we get to spy_data method for added safety
++ *	- Remove spy #ifdef, they are always on -> cleaner code
++ *	- Add IW_DESCR_FLAG_NOMAX flag for very large requests
++ *	- Start migrating get_wireless_stats to struct iw_handler_def
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+ 
+-/* Enable enhanced spy support. Disable to reduce footprint */
++/* Enhanced spy support available */
+ #define IW_WIRELESS_SPY
+ #define IW_WIRELESS_THRSPY
+ 
+@@ -258,6 +265,7 @@
+ #define IW_DESCR_FLAG_EVENT	0x0002	/* Generate an event on SET */
+ #define IW_DESCR_FLAG_RESTRICT	0x0004	/* GET : request is ROOT only */
+ 				/* SET : Omit payload from generated iwevent */
++#define IW_DESCR_FLAG_NOMAX	0x0008	/* GET : no limit on request size */
+ /* Driver level flags */
+ #define IW_DESCR_FLAG_WAIT	0x0100	/* Wait for driver event */
+ 
+@@ -311,23 +319,25 @@ struct iw_handler_def
+ 	/* Array of handlers for standard ioctls
+ 	 * We will call dev->wireless_handlers->standard[ioctl - SIOCSIWNAME]
+ 	 */
+-	iw_handler *		standard;
++	const iw_handler *	standard;
+ 
+ 	/* Array of handlers for private ioctls
+ 	 * Will call dev->wireless_handlers->private[ioctl - SIOCIWFIRSTPRIV]
+ 	 */
+-	iw_handler *		private;
++	const iw_handler *	private;
+ 
+ 	/* Arguments of private handler. This one is just a list, so you
+ 	 * can put it in any order you want and should not leave holes...
+ 	 * We will automatically export that to user space... */
+-	struct iw_priv_args *	private_args;
++	const struct iw_priv_args *	private_args;
+ 
+-	/* Driver enhanced spy support */
+-	long			spy_offset;	/* Spy data offset */
++	/* This field will be *removed* in the next version of WE */
++	long			spy_offset;	/* DO NOT USE */
+ 
+-	/* In the long term, get_wireless_stats will move from
+-	 * 'struct net_device' to here, to minimise bloat. */
++	/* New location of get_wireless_stats, to de-bloat struct net_device.
++	 * The old pointer in struct net_device will be gradually phased
++	 * out, and drivers are encouraged to use this one... */
++	struct iw_statistics*	(*get_wireless_stats)(struct net_device *dev);
+ };
+ 
+ /* ---------------------- IOCTL DESCRIPTION ---------------------- */
+@@ -374,18 +384,29 @@ struct iw_ioctl_description
+  */
+ struct iw_spy_data
+ {
+-#ifdef IW_WIRELESS_SPY
+ 	/* --- Standard spy support --- */
+ 	int			spy_number;
+ 	u_char			spy_address[IW_MAX_SPY][ETH_ALEN];
+ 	struct iw_quality	spy_stat[IW_MAX_SPY];
+-#ifdef IW_WIRELESS_THRSPY
+ 	/* --- Enhanced spy support (event) */
+ 	struct iw_quality	spy_thr_low;	/* Low threshold */
+ 	struct iw_quality	spy_thr_high;	/* High threshold */
+ 	u_char			spy_thr_under[IW_MAX_SPY];
+-#endif /* IW_WIRELESS_THRSPY */
+-#endif /* IW_WIRELESS_SPY */
++};
++
++/* --------------------- DEVICE WIRELESS DATA --------------------- */
++/*
++ * This is all the wireless data specific to a device instance that
++ * is managed by the core of Wireless Extensions.
++ * We only keep pointer to those structures, so that a driver is free
++ * to share them between instances.
++ * This structure should be initialised before registering the device.
++ * Access to this data follow the same rules as any other struct net_device
++ * data (i.e. valid as long as struct net_device exist, same locking rules).
++ */
++struct iw_public_data {
++	/* Driver enhanced spy support */
++	struct iw_spy_data *	spy_data;
+ };
+ 
+ /**************************** PROTOTYPES ****************************/
+diff -u -p linux/net/core/dev.we16.c linux/net/core/dev.c
+--- linux/net/core/dev.we16.c	2005-02-03 14:55:56.000000000 -0800
++++ linux/net/core/dev.c	2005-02-03 15:28:48.000000000 -0800
+@@ -2426,7 +2426,7 @@ int dev_ioctl(unsigned int cmd, void *ar
+ 				/* Follow me in net/core/wireless.c */
+ 				ret = wireless_process_ioctl(&ifr, cmd);
+ 				rtnl_unlock();
+-				if (!ret && IW_IS_GET(cmd) &&
++				if (IW_IS_GET(cmd) &&
+ 				    copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ 					return -EFAULT;
+ 				return ret;
+diff -u -p linux/net/core/wireless.we16.c linux/net/core/wireless.c
+--- linux/net/core/wireless.we16.c	2005-02-03 14:56:09.000000000 -0800
++++ linux/net/core/wireless.c	2005-02-03 16:33:22.000000000 -0800
+@@ -2,7 +2,7 @@
+  * This file implement the Wireless Extensions APIs.
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2003 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2004 Jean Tourrilhes, All Rights Reserved.
+  *
+  * (As all part of the Linux kernel, this file is GPL)
+  */
+@@ -48,6 +48,16 @@
+  *	o Add common spy support : iw_handler_set_spy(), wireless_spy_update()
+  *	o Add enhanced spy support : iw_handler_set_thrspy() and event.
+  *	o Add WIRELESS_EXT version display in /proc/net/wireless
++ *
++ * v6 - 18.06.04 - Jean II
++ *	o Change get_spydata() method for added safety
++ *	o Remove spy #ifdef, they are always on -> cleaner code
++ *	o Allow any size GET request if user specifies length > max
++ *		and if request has IW_DESCR_FLAG_NOMAX flag or is SIOCGIWPRIV
++ *	o Start migrating get_wireless_stats to struct iw_handler_def
++ *	o Add wmb() in iw_handler_set_spy() for non-coherent archs/cpus
++ * Based on patch from Pavel Roskin <proski@gnu.org> :
++ *	o Fix kernel data leak to user space in private handler handling
+  */
+ 
+ /***************************** INCLUDES *****************************/
+@@ -64,11 +74,7 @@
+ 
+ /**************************** CONSTANTS ****************************/
+ 
+-/* Enough lenience, let's make sure things are proper... */
+-#define WE_STRICT_WRITE		/* Check write buffer size */
+-/* I'll probably drop both the define and kernel message in the next version */
+-
+-/* Debuging stuff */
++/* Debugging stuff */
+ #undef WE_IOCTL_DEBUG		/* Debug IOCTL API */
+ #undef WE_EVENT_DEBUG		/* Debug Event dispatcher */
+ #undef WE_SPY_DEBUG		/* Debug enhanced spy support */
+@@ -134,11 +140,11 @@ static const struct iw_ioctl_description
+ 	/* -- hole -- */
+ 	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWAPLIST */
+-	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, 0},
++	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, IW_DESCR_FLAG_NOMAX},
+ 	/* SIOCSIWSCAN */
+ 	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWSCAN */
+-	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_SCAN_MAX_DATA, 0},
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_SCAN_MAX_DATA, IW_DESCR_FLAG_NOMAX},
+ 	/* SIOCSIWESSID */
+ 	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, IW_DESCR_FLAG_EVENT},
+ 	/* SIOCGIWESSID */
+@@ -203,7 +209,7 @@ static const int standard_event_num = (s
+ 				       sizeof(struct iw_ioctl_description));
+ 
+ /* Size (in bytes) of the various private data types */
+-static const char priv_type_size[] = {
++static const char iw_priv_type_size[] = {
+ 	0,				/* IW_PRIV_TYPE_NONE */
+ 	1,				/* IW_PRIV_TYPE_BYTE */
+ 	1,				/* IW_PRIV_TYPE_CHAR */
+@@ -270,12 +276,15 @@ static inline iw_handler get_handler(str
+  */
+ static inline struct iw_statistics *get_wireless_stats(struct net_device *dev)
+ {
++	/* New location */
++	if((dev->wireless_handlers != NULL) &&
++	   (dev->wireless_handlers->get_wireless_stats != NULL))
++		return dev->wireless_handlers->get_wireless_stats(dev);
++
++	/* Old location, will be phased out in next WE */
+ 	return (dev->get_wireless_stats ?
+ 		dev->get_wireless_stats(dev) :
+ 		(struct iw_statistics *) NULL);
+-	/* In the future, get_wireless_stats may move from 'struct net_device'
+-	 * to 'struct iw_handler_def', to de-bloat struct net_device.
+-	 * Definitely worse a thought... */
+ }
+ 
+ /* ---------------------------------------------------------------- */
+@@ -310,14 +319,32 @@ static inline int call_commit_handler(st
+ 
+ /* ---------------------------------------------------------------- */
+ /*
+- * Number of private arguments
++ * Calculate size of private arguments
+  */
+ static inline int get_priv_size(__u16	args)
+ {
+ 	int	num = args & IW_PRIV_SIZE_MASK;
+ 	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
+ 
+-	return num * priv_type_size[type];
++	return num * iw_priv_type_size[type];
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Re-calculate the size of private arguments
++ */
++static inline int adjust_priv_size(__u16		args,
++				   union iwreq_data *	wrqu)
++{
++	int	num = wrqu->data.length;
++	int	max = args & IW_PRIV_SIZE_MASK;
++	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
++
++	/* Make sure the driver doesn't goof up */
++	if (max < num)
++		num = max;
++
++	return num * iw_priv_type_size[type];
+ }
+ 
+ 
+@@ -350,11 +377,14 @@ static inline int sprintf_wireless_stats
+ 			       dev->name,
+ 			       stats->status,
+ 			       stats->qual.qual,
+-			       stats->qual.updated & 1 ? '.' : ' ',
++			       stats->qual.updated & IW_QUAL_QUAL_UPDATED
++			       ? '.' : ' ',
+ 			       ((__u8) stats->qual.level),
+-			       stats->qual.updated & 2 ? '.' : ' ',
++			       stats->qual.updated & IW_QUAL_LEVEL_UPDATED
++			       ? '.' : ' ',
+ 			       ((__u8) stats->qual.noise),
+-			       stats->qual.updated & 4 ? '.' : ' ',
++			       stats->qual.updated & IW_QUAL_NOISE_UPDATED
++			       ? '.' : ' ',
+ 			       stats->discard.nwid,
+ 			       stats->discard.code,
+ 			       stats->discard.fragment,
+@@ -470,13 +500,15 @@ static inline int ioctl_export_private(s
+ 	/* Check NULL pointer */
+ 	if(iwr->u.data.pointer == NULL)
+ 		return -EFAULT;
+-#ifdef WE_STRICT_WRITE
++
+ 	/* Check if there is enough buffer up there */
+ 	if(iwr->u.data.length < dev->wireless_handlers->num_private_args) {
+-		printk(KERN_ERR "%s (WE) : Buffer for request SIOCGIWPRIV too small (%d<%d)\n", dev->name, iwr->u.data.length, dev->wireless_handlers->num_private_args);
++		/* User space can't know in advance how large the buffer
++		 * needs to be. Give it a hint, so that we can support
++		 * any size buffer we want somewhat efficiently... */
++		iwr->u.data.length = dev->wireless_handlers->num_private_args;
+ 		return -E2BIG;
+ 	}
+-#endif	/* WE_STRICT_WRITE */
+ 
+ 	/* Set the number of available ioctls. */
+ 	iwr->u.data.length = dev->wireless_handlers->num_private_args;
+@@ -505,7 +537,6 @@ static inline int ioctl_standard_call(st
+ 	const struct iw_ioctl_description *	descr;
+ 	struct iw_request_info			info;
+ 	int					ret = -EINVAL;
+-	int					user_size = 0;
+ 
+ 	/* Get the description of the IOCTL */
+ 	if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
+@@ -536,8 +567,14 @@ static inline int ioctl_standard_call(st
+ #endif	/* WE_SET_EVENT */
+ 	} else {
+ 		char *	extra;
++		int	extra_size;
++		int	user_length = 0;
+ 		int	err;
+ 
++		/* Calculate space needed by arguments. Always allocate
++		 * for max space. Easier, and won't last long... */
++		extra_size = descr->max_tokens * descr->token_size;
++
+ 		/* Check what user space is giving us */
+ 		if(IW_IS_SET(cmd)) {
+ 			/* Check NULL pointer */
+@@ -554,18 +591,33 @@ static inline int ioctl_standard_call(st
+ 			if(iwr->u.data.pointer == NULL)
+ 				return -EFAULT;
+ 			/* Save user space buffer size for checking */
+-			user_size = iwr->u.data.length;
++			user_length = iwr->u.data.length;
++
++			/* Don't check if user_length > max to allow forward
++			 * compatibility. The test user_length < min is
++			 * implied by the test at the end. */
++
++			/* Support for very large requests */
++			if((descr->flags & IW_DESCR_FLAG_NOMAX) &&
++			   (user_length > descr->max_tokens)) {
++				/* Allow userspace to GET more than max so
++				 * we can support any size GET requests.
++				 * There is still a limit : -ENOMEM. */
++				extra_size = user_length * descr->token_size;
++				/* Note : user_length is originally a __u16,
++				 * and token_size is controlled by us,
++				 * so extra_size won't get negative and
++				 * won't overflow... */
++			}
+ 		}
+ 
+ #ifdef WE_IOCTL_DEBUG
+ 		printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
+-		       dev->name, descr->max_tokens * descr->token_size);
++		       dev->name, extra_size);
+ #endif	/* WE_IOCTL_DEBUG */
+ 
+-		/* Always allocate for max space. Easier, and won't last
+-		 * long... */
+-		extra = kmalloc(descr->max_tokens * descr->token_size,
+-				GFP_KERNEL);
++		/* Create the kernel buffer */
++		extra = kmalloc(extra_size, GFP_KERNEL);
+ 		if (extra == NULL) {
+ 			return -ENOMEM;
+ 		}
+@@ -591,14 +643,11 @@ static inline int ioctl_standard_call(st
+ 
+ 		/* If we have something to return to the user */
+ 		if (!ret && IW_IS_GET(cmd)) {
+-#ifdef WE_STRICT_WRITE
+ 			/* Check if there is enough buffer up there */
+-			if(user_size < iwr->u.data.length) {
+-				printk(KERN_ERR "%s (WE) : Buffer for request %04X too small (%d<%d)\n", dev->name, cmd, user_size, iwr->u.data.length);
++			if(user_length < iwr->u.data.length) {
+ 				kfree(extra);
+ 				return -E2BIG;
+ 			}
+-#endif	/* WE_STRICT_WRITE */
+ 
+ 			err = copy_to_user(iwr->u.data.pointer, extra,
+ 					   iwr->u.data.length *
+@@ -661,7 +710,7 @@ static inline int ioctl_private_call(str
+ 				     iw_handler		handler)
+ {
+ 	struct iwreq *			iwr = (struct iwreq *) ifr;
+-	struct iw_priv_args *		descr = NULL;
++	const struct iw_priv_args *	descr = NULL;
+ 	struct iw_request_info		info;
+ 	int				extra_size = 0;
+ 	int				i;
+@@ -701,7 +750,7 @@ static inline int ioctl_private_call(str
+ 			   ((extra_size + offset) <= IFNAMSIZ))
+ 				extra_size = 0;
+ 		} else {
+-			/* Size of set arguments */
++			/* Size of get arguments */
+ 			extra_size = get_priv_size(descr->get_args);
+ 
+ 			/* Does it fits in iwr ? */
+@@ -771,6 +820,14 @@ static inline int ioctl_private_call(str
+ 
+ 		/* If we have something to return to the user */
+ 		if (!ret && IW_IS_GET(cmd)) {
++
++			/* Adjust for the actual length if it's variable,
++			 * avoid leaking kernel bits outside. */
++			if (!(descr->get_args & IW_PRIV_SIZE_FIXED)) {
++				extra_size = adjust_priv_size(descr->get_args,
++							      &(iwr->u));
++			}
++
+ 			err = copy_to_user(iwr->u.data.pointer, extra,
+ 					   extra_size);
+ 			if (err)
+@@ -1042,9 +1099,25 @@ void wireless_send_event(struct net_devi
+  * One of the main advantage of centralising spy support here is that
+  * it becomes much easier to improve and extend it without having to touch
+  * the drivers. One example is the addition of the Spy-Threshold events.
+- * Note : IW_WIRELESS_SPY is defined in iw_handler.h
+  */
+ 
++/* ---------------------------------------------------------------- */
++/*
++ * Return the pointer to the spy data in the driver.
++ * Because this is called on the Rx path via wireless_spy_update(),
++ * we want it to be efficient...
++ */
++static inline struct iw_spy_data * get_spydata(struct net_device *dev)
++{
++	/* This is the new way */
++	if(dev->wireless_data)
++		return(dev->wireless_data->spy_data);
++
++	/* This is the old way. Doesn't work for multi-headed drivers.
++	 * It will be removed in the next version of WE. */
++	return (dev->priv + dev->wireless_handlers->spy_offset);
++}
++
+ /*------------------------------------------------------------------*/
+ /*
+  * Standard Wireless Handler : set Spy List
+@@ -1054,16 +1127,26 @@ int iw_handler_set_spy(struct net_device
+ 		       union iwreq_data *	wrqu,
+ 		       char *			extra)
+ {
+-#ifdef IW_WIRELESS_SPY
+-	struct iw_spy_data *	spydata = (dev->priv +
+-					   dev->wireless_handlers->spy_offset);
++	struct iw_spy_data *	spydata = get_spydata(dev);
+ 	struct sockaddr *	address = (struct sockaddr *) extra;
+ 
++	/* Make sure driver is not buggy or using the old API */
++	if(!spydata)
++		return -EOPNOTSUPP;
++
+ 	/* Disable spy collection while we copy the addresses.
+-	 * As we don't disable interrupts, we need to do this to avoid races.
+-	 * As we are the only writer, this is good enough. */
++	 * While we copy addresses, any call to wireless_spy_update()
++	 * will NOP. This is OK, as anyway the addresses are changing. */
+ 	spydata->spy_number = 0;
+ 
++	/* We want to operate without locking, because wireless_spy_update()
++	 * most likely will happen in the interrupt handler, and therefore
++	 * have its own locking constraints and needs performance.
++	 * The rtnl_lock() make sure we don't race with the other iw_handlers.
++	 * This make sure wireless_spy_update() "see" that the spy list
++	 * is temporarily disabled. */
++	wmb();
++
+ 	/* Are there are addresses to copy? */
+ 	if(wrqu->data.length > 0) {
+ 		int i;
+@@ -1089,13 +1172,14 @@ int iw_handler_set_spy(struct net_device
+ 			       spydata->spy_address[i][5]);
+ #endif	/* WE_SPY_DEBUG */
+ 	}
++
++	/* Make sure above is updated before re-enabling */
++	wmb();
++
+ 	/* Enable addresses */
+ 	spydata->spy_number = wrqu->data.length;
+ 
+ 	return 0;
+-#else /* IW_WIRELESS_SPY */
+-	return -EOPNOTSUPP;
+-#endif /* IW_WIRELESS_SPY */
+ }
+ 
+ /*------------------------------------------------------------------*/
+@@ -1107,12 +1191,14 @@ int iw_handler_get_spy(struct net_device
+ 		       union iwreq_data *	wrqu,
+ 		       char *			extra)
+ {
+-#ifdef IW_WIRELESS_SPY
+-	struct iw_spy_data *	spydata = (dev->priv +
+-					   dev->wireless_handlers->spy_offset);
++	struct iw_spy_data *	spydata = get_spydata(dev);
+ 	struct sockaddr *	address = (struct sockaddr *) extra;
+ 	int			i;
+ 
++	/* Make sure driver is not buggy or using the old API */
++	if(!spydata)
++		return -EOPNOTSUPP;
++
+ 	wrqu->data.length = spydata->spy_number;
+ 
+ 	/* Copy addresses. */
+@@ -1129,9 +1215,6 @@ int iw_handler_get_spy(struct net_device
+ 	for(i = 0; i < spydata->spy_number; i++)
+ 		spydata->spy_stat[i].updated = 0;
+ 	return 0;
+-#else /* IW_WIRELESS_SPY */
+-	return -EOPNOTSUPP;
+-#endif /* IW_WIRELESS_SPY */
+ }
+ 
+ /*------------------------------------------------------------------*/
+@@ -1143,11 +1226,13 @@ int iw_handler_set_thrspy(struct net_dev
+ 			  union iwreq_data *	wrqu,
+ 			  char *		extra)
+ {
+-#ifdef IW_WIRELESS_THRSPY
+-	struct iw_spy_data *	spydata = (dev->priv +
+-					   dev->wireless_handlers->spy_offset);
++	struct iw_spy_data *	spydata = get_spydata(dev);
+ 	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
+ 
++	/* Make sure driver is not buggy or using the old API */
++	if(!spydata)
++		return -EOPNOTSUPP;
++
+ 	/* Just do it */
+ 	memcpy(&(spydata->spy_thr_low), &(threshold->low),
+ 	       2 * sizeof(struct iw_quality));
+@@ -1160,9 +1245,6 @@ int iw_handler_set_thrspy(struct net_dev
+ #endif	/* WE_SPY_DEBUG */
+ 
+ 	return 0;
+-#else /* IW_WIRELESS_THRSPY */
+-	return -EOPNOTSUPP;
+-#endif /* IW_WIRELESS_THRSPY */
+ }
+ 
+ /*------------------------------------------------------------------*/
+@@ -1174,22 +1256,20 @@ int iw_handler_get_thrspy(struct net_dev
+ 			  union iwreq_data *	wrqu,
+ 			  char *		extra)
+ {
+-#ifdef IW_WIRELESS_THRSPY
+-	struct iw_spy_data *	spydata = (dev->priv +
+-					   dev->wireless_handlers->spy_offset);
++	struct iw_spy_data *	spydata = get_spydata(dev);
+ 	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
+ 
++	/* Make sure driver is not buggy or using the old API */
++	if(!spydata)
++		return -EOPNOTSUPP;
++
+ 	/* Just do it */
+ 	memcpy(&(threshold->low), &(spydata->spy_thr_low),
+ 	       2 * sizeof(struct iw_quality));
+ 
+ 	return 0;
+-#else /* IW_WIRELESS_THRSPY */
+-	return -EOPNOTSUPP;
+-#endif /* IW_WIRELESS_THRSPY */
+ }
+ 
+-#ifdef IW_WIRELESS_THRSPY
+ /*------------------------------------------------------------------*/
+ /*
+  * Prepare and send a Spy Threshold event
+@@ -1227,7 +1307,6 @@ static void iw_send_thrspy_event(struct 
+ 	/* Send event to user space */
+ 	wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
+ }
+-#endif /* IW_WIRELESS_THRSPY */
+ 
+ /* ---------------------------------------------------------------- */
+ /*
+@@ -1240,12 +1319,14 @@ void wireless_spy_update(struct net_devi
+ 			 unsigned char *	address,
+ 			 struct iw_quality *	wstats)
+ {
+-#ifdef IW_WIRELESS_SPY
+-	struct iw_spy_data *	spydata = (dev->priv +
+-					   dev->wireless_handlers->spy_offset);
++	struct iw_spy_data *	spydata = get_spydata(dev);
+ 	int			i;
+ 	int			match = -1;
+ 
++	/* Make sure driver is not buggy or using the old API */
++	if(!spydata)
++		return;
++
+ #ifdef WE_SPY_DEBUG
+ 	printk(KERN_DEBUG "wireless_spy_update() :  offset %ld, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_handlers->spy_offset, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
+ #endif	/* WE_SPY_DEBUG */
+@@ -1257,7 +1338,7 @@ void wireless_spy_update(struct net_devi
+ 			       sizeof(struct iw_quality));
+ 			match = i;
+ 		}
+-#ifdef IW_WIRELESS_THRSPY
++
+ 	/* Generate an event if we cross the spy threshold.
+ 	 * To avoid event storms, we have a simple hysteresis : we generate
+ 	 * event only when we go under the low threshold or above the
+@@ -1277,6 +1358,4 @@ void wireless_spy_update(struct net_devi
+ 			}
+ 		}
+ 	}
+-#endif /* IW_WIRELESS_THRSPY */
+-#endif /* IW_WIRELESS_SPY */
+ }
diff --git a/recipes/linux/files/iw_handlers.w13-5.diff b/recipes/linux/files/iw_handlers.w13-5.diff
new file mode 100644
index 0000000000..a27a7654a9
--- /dev/null
+++ b/recipes/linux/files/iw_handlers.w13-5.diff
@@ -0,0 +1,1513 @@
+diff -u -p -r --new-file linux/include/linux-w12/netdevice.h linux/include/linux/netdevice.h
+--- linux/include/linux-w12/netdevice.h	Thu Nov 22 11:47:09 2001
++++ linux/include/linux/netdevice.h	Thu Jan 17 12:00:39 2002
+@@ -278,6 +278,10 @@ struct net_device
+ 	struct net_device_stats* (*get_stats)(struct net_device *dev);
+ 	struct iw_statistics*	(*get_wireless_stats)(struct net_device *dev);
+ 
++	/* List of functions to handle Wireless Extensions (instead of ioctl).
++	 * See <net/iw_handler.h> for details. Jean II */
++	struct iw_handler_def *	wireless_handlers;
++
+ 	/*
+ 	 * This marks the end of the "visible" part of the structure. All
+ 	 * fields hereafter are internal to the system, and may change at
+diff -u -p -r --new-file linux/include/linux-w12/wireless.h linux/include/linux/wireless.h
+--- linux/include/linux-w12/wireless.h	Thu Nov 22 11:47:12 2001
++++ linux/include/linux/wireless.h	Thu Jan 17 12:04:08 2002
+@@ -1,9 +1,10 @@
+ /*
+  * This file define a set of standard wireless extensions
+  *
+- * Version :	12	5.10.01
++ * Version :	13	6.12.01
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
++ * Copyright (c) 1997-2001 Jean Tourrilhes, All Rights Reserved.
+  */
+ 
+ #ifndef _LINUX_WIRELESS_H
+@@ -11,6 +12,8 @@
+ 
+ /************************** DOCUMENTATION **************************/
+ /*
++ * Initial APIs (1996 -> onward) :
++ * -----------------------------
+  * Basically, the wireless extensions are for now a set of standard ioctl
+  * call + /proc/net/wireless
+  *
+@@ -27,16 +30,27 @@
+  * We have the list of command plus a structure descibing the
+  * data exchanged...
+  * Note that to add these ioctl, I was obliged to modify :
+- *	net/core/dev.c (two place + add include)
+- *	net/ipv4/af_inet.c (one place + add include)
++ *	# net/core/dev.c (two place + add include)
++ *	# net/ipv4/af_inet.c (one place + add include)
+  *
+  * /proc/net/wireless is a copy of /proc/net/dev.
+  * We have a structure for data passed from the driver to /proc/net/wireless
+  * Too add this, I've modified :
+- *	net/core/dev.c (two other places)
+- *	include/linux/netdevice.h (one place)
+- *	include/linux/proc_fs.h (one place)
++ *	# net/core/dev.c (two other places)
++ *	# include/linux/netdevice.h (one place)
++ *	# include/linux/proc_fs.h (one place)
++ *
++ * New driver API (2001 -> onward) :
++ * -------------------------------
++ * This file is only concerned with the user space API and common definitions.
++ * The new driver API is defined and documented in :
++ *	# include/net/iw_handler.h
+  *
++ * Note as well that /proc/net/wireless implementation has now moved in :
++ *	# include/linux/wireless.c
++ *
++ * Other comments :
++ * --------------
+  * Do not add here things that are redundant with other mechanisms
+  * (drivers init, ifconfig, /proc/net/dev, ...) and with are not
+  * wireless specific.
+@@ -54,16 +68,14 @@
+ #include <linux/socket.h>		/* for "struct sockaddr" et al	*/
+ #include <linux/if.h>			/* for IFNAMSIZ and co... */
+ 
+-/**************************** CONSTANTS ****************************/
+-
+-/* --------------------------- VERSION --------------------------- */
++/***************************** VERSION *****************************/
+ /*
+  * This constant is used to know the availability of the wireless
+  * extensions and to know which version of wireless extensions it is
+  * (there is some stuff that will be added in the future...)
+  * I just plan to increment with each new version.
+  */
+-#define WIRELESS_EXT	12
++#define WIRELESS_EXT	13
+ 
+ /*
+  * Changes :
+@@ -123,12 +135,20 @@
+  *	- Add DEV PRIVATE IOCTL to avoid collisions in SIOCDEVPRIVATE space
+  *	- Add new statistics (frag, retry, beacon)
+  *	- Add average quality (for user space calibration)
++ *
++ * V12 to V13
++ * ----------
++ *	- Document creation of new driver API.
++ *	- Extract union iwreq_data from struct iwreq (for new driver API).
++ *	- Rename SIOCSIWNAME as SIOCSIWCOMMIT
+  */
+ 
++/**************************** CONSTANTS ****************************/
++
+ /* -------------------------- IOCTL LIST -------------------------- */
+ 
+ /* Basic operations */
+-#define SIOCSIWNAME	0x8B00		/* Unused */
++#define SIOCSIWCOMMIT	0x8B00		/* Commit pending changes to driver */
+ #define SIOCGIWNAME	0x8B01		/* get name == wireless protocol */
+ #define SIOCSIWNWID	0x8B02		/* set network id (the cell) */
+ #define SIOCGIWNWID	0x8B03		/* get network id */
+@@ -414,13 +434,49 @@ struct	iw_statistics
+ 
+ /* ------------------------ IOCTL REQUEST ------------------------ */
+ /*
++ * This structure defines the payload of an ioctl, and is used 
++ * below.
++ *
++ * Note that this structure should fit on the memory footprint
++ * of iwreq (which is the same as ifreq), which mean a max size of
++ * 16 octets = 128 bits. Warning, pointers might be 64 bits wide...
++ * You should check this when increasing the structures defined
++ * above in this file...
++ */
++union	iwreq_data
++{
++	/* Config - generic */
++	char		name[IFNAMSIZ];
++	/* Name : used to verify the presence of  wireless extensions.
++	 * Name of the protocol/provider... */
++
++	struct iw_point	essid;		/* Extended network name */
++	struct iw_param	nwid;		/* network id (or domain - the cell) */
++	struct iw_freq	freq;		/* frequency or channel :
++					 * 0-1000 = channel
++					 * > 1000 = frequency in Hz */
++
++	struct iw_param	sens;		/* signal level threshold */
++	struct iw_param	bitrate;	/* default bit rate */
++	struct iw_param	txpower;	/* default transmit power */
++	struct iw_param	rts;		/* RTS threshold threshold */
++	struct iw_param	frag;		/* Fragmentation threshold */
++	__u32		mode;		/* Operation mode */
++	struct iw_param	retry;		/* Retry limits & lifetime */
++
++	struct iw_point	encoding;	/* Encoding stuff : tokens */
++	struct iw_param	power;		/* PM duration/timeout */
++
++	struct sockaddr	ap_addr;	/* Access point address */
++
++	struct iw_point	data;		/* Other large parameters */
++};
++
++/*
+  * The structure to exchange data for ioctl.
+  * This structure is the same as 'struct ifreq', but (re)defined for
+  * convenience...
+- *
+- * Note that it should fit on the same memory footprint !
+- * You should check this when increasing the above structures (16 octets)
+- * 16 octets = 128 bits. Warning, pointers might be 64 bits wide...
++ * Do I need to remind you about structure size (32 octets) ?
+  */
+ struct	iwreq 
+ {
+@@ -429,35 +485,8 @@ struct	iwreq 
+ 		char	ifrn_name[IFNAMSIZ];	/* if name, e.g. "eth0" */
+ 	} ifr_ifrn;
+ 
+-	/* Data part */
+-	union
+-	{
+-		/* Config - generic */
+-		char		name[IFNAMSIZ];
+-		/* Name : used to verify the presence of  wireless extensions.
+-		 * Name of the protocol/provider... */
+-
+-		struct iw_point	essid;	/* Extended network name */
+-		struct iw_param	nwid;	/* network id (or domain - the cell) */
+-		struct iw_freq	freq;	/* frequency or channel :
+-					 * 0-1000 = channel
+-					 * > 1000 = frequency in Hz */
+-
+-		struct iw_param	sens;		/* signal level threshold */
+-		struct iw_param	bitrate;	/* default bit rate */
+-		struct iw_param	txpower;	/* default transmit power */
+-		struct iw_param	rts;		/* RTS threshold threshold */
+-		struct iw_param	frag;		/* Fragmentation threshold */
+-		__u32		mode;		/* Operation mode */
+-		struct iw_param	retry;		/* Retry limits & lifetime */
+-
+-		struct iw_point	encoding;	/* Encoding stuff : tokens */
+-		struct iw_param	power;		/* PM duration/timeout */
+-
+-		struct sockaddr	ap_addr;	/* Access point address */
+-
+-		struct iw_point	data;		/* Other large parameters */
+-	}	u;
++	/* Data part (defined just above) */
++	union	iwreq_data	u;
+ };
+ 
+ /* -------------------------- IOCTL DATA -------------------------- */
+diff -u -p -r --new-file linux/include/net-w12/iw_handler.h linux/include/net/iw_handler.h
+--- linux/include/net-w12/iw_handler.h	Wed Dec 31 16:00:00 1969
++++ linux/include/net/iw_handler.h	Thu Jan 17 12:16:46 2002
+@@ -0,0 +1,374 @@
++/*
++ * This file define the new driver API for Wireless Extensions
++ *
++ * Version :	2	6.12.01
++ *
++ * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
++ * Copyright (c) 2001 Jean Tourrilhes, All Rights Reserved.
++ */
++
++#ifndef _IW_HANDLER_H
++#define _IW_HANDLER_H
++
++/************************** DOCUMENTATION **************************/
++/*
++ * Initial driver API (1996 -> onward) :
++ * -----------------------------------
++ * The initial API just sends the IOCTL request received from user space
++ * to the driver (via the driver ioctl handler). The driver has to
++ * handle all the rest...
++ *
++ * The initial API also defines a specific handler in struct net_device
++ * to handle wireless statistics.
++ *
++ * The initial APIs served us well and has proven a reasonably good design.
++ * However, there is a few shortcommings :
++ *	o No events, everything is a request to the driver.
++ *	o Large ioctl function in driver with gigantic switch statement
++ *	  (i.e. spaghetti code).
++ *	o Driver has to mess up with copy_to/from_user, and in many cases
++ *	  does it unproperly. Common mistakes are :
++ *		* buffer overflows (no checks or off by one checks)
++ *		* call copy_to/from_user with irq disabled
++ *	o The user space interface is tied to ioctl because of the use
++ *	  copy_to/from_user.
++ *
++ * New driver API (2001 -> onward) :
++ * -------------------------------
++ * The new driver API is just a bunch of standard functions (handlers),
++ * each handling a specific Wireless Extension. The driver just export
++ * the list of handler it supports, and those will be called apropriately.
++ *
++ * I tried to keep the main advantage of the previous API (simplicity,
++ * efficiency and light weight), and also I provide a good dose of backward
++ * compatibility (most structures are the same, driver can use both API
++ * simultaneously, ...).
++ * Hopefully, I've also addressed the shortcomming of the initial API.
++ *
++ * The advantage of the new API are :
++ *	o Handling of Extensions in driver broken in small contained functions
++ *	o Tighter checks of ioctl before calling the driver
++ *	o Flexible commit strategy (at least, the start of it)
++ *	o Backward compatibility (can be mixed with old API)
++ *	o Driver doesn't have to worry about memory and user-space issues
++ * The last point is important for the following reasons :
++ *	o You are now able to call the new driver API from any API you
++ *		want (including from within other parts of the kernel).
++ *	o Common mistakes are avoided (buffer overflow, user space copy
++ *		with irq disabled and so on).
++ *
++ * The Drawback of the new API are :
++ *	o bloat (especially kernel)
++ *	o need to migrate existing drivers to new API
++ * My initial testing shows that the new API adds around 3kB to the kernel
++ * and save between 0 and 5kB from a typical driver.
++ * Also, as all structures and data types are unchanged, the migration is
++ * quite straightforward (but tedious).
++ *
++ * ---
++ *
++ * The new driver API is defined below in this file. User space should
++ * not be aware of what's happening down there...
++ *
++ * A new kernel wrapper is in charge of validating the IOCTLs and calling
++ * the appropriate driver handler. This is implemented in :
++ *	# net/core/wireless.c
++ *
++ * The driver export the list of handlers in :
++ *	# include/linux/netdevice.h (one place)
++ *
++ * The new driver API is available for WIRELESS_EXT >= 13.
++ * Good luck with migration to the new API ;-)
++ */
++
++/* ---------------------- THE IMPLEMENTATION ---------------------- */
++/*
++ * Some of the choice I've made are pretty controversials. Defining an
++ * API is very much weighting compromises. This goes into some of the
++ * details and the thinking behind the implementation.
++ *
++ * Implementation goals :
++ * --------------------
++ * The implementation goals were as follow :
++ *	o Obvious : you should not need a PhD to understand what's happening,
++ *		the benefit is easier maintainance.
++ *	o Flexible : it should accomodate a wide variety of driver
++ *		implementations and be as flexible as the old API.
++ *	o Lean : it should be efficient memory wise to minimise the impact
++ *		on kernel footprint.
++ *	o Transparent to user space : the large number of user space
++ *		applications that use Wireless Extensions should not need
++ *		any modifications.
++ *
++ * Array of functions versus Struct of functions
++ * ---------------------------------------------
++ * 1) Having an array of functions allow the kernel code to access the
++ * handler in a single lookup, which is much more efficient (think hash
++ * table here).
++ * 2) The only drawback is that driver writer may put their handler in
++ * the wrong slot. This is trivial to test (I set the frequency, the
++ * bitrate changes). Once the handler is in the proper slot, it will be
++ * there forever, because the array is only extended at the end.
++ * 3) Backward/forward compatibility : adding new handler just require
++ * extending the array, so you can put newer driver in older kernel
++ * without having to patch the kernel code (and vice versa).
++ *
++ * All handler are of the same generic type
++ * ----------------------------------------
++ * That's a feature !!!
++ * 1) Having a generic handler allow to have generic code, which is more
++ * efficient. If each of the handler was individually typed I would need
++ * to add a big switch in the kernel (== more bloat). This solution is
++ * more scalable, adding new Wireless Extensions doesn't add new code.
++ * 2) You can use the same handler in different slots of the array. For
++ * hardware, it may be more efficient or logical to handle multiple
++ * Wireless Extensions with a single function, and the API allow you to
++ * do that. (An example would be a single record on the card to control
++ * both bitrate and frequency, the handler would read the old record,
++ * modify it according to info->cmd and rewrite it).
++ *
++ * Functions prototype uses union iwreq_data
++ * -----------------------------------------
++ * Some would have prefered functions defined this way :
++ *	static int mydriver_ioctl_setrate(struct net_device *dev, 
++ *					  long rate, int auto)
++ * 1) The kernel code doesn't "validate" the content of iwreq_data, and
++ * can't do it (different hardware may have different notion of what a
++ * valid frequency is), so we don't pretend that we do it.
++ * 2) The above form is not extendable. If I want to add a flag (for
++ * example to distinguish setting max rate and basic rate), I would
++ * break the prototype. Using iwreq_data is more flexible.
++ * 3) Also, the above form is not generic (see above).
++ * 4) I don't expect driver developper using the wrong field of the
++ * union (Doh !), so static typechecking doesn't add much value.
++ * 5) Lastly, you can skip the union by doing :
++ *	static int mydriver_ioctl_setrate(struct net_device *dev,
++ *					  struct iw_request_info *info,
++ *					  struct iw_param *rrq,
++ *					  char *extra)
++ * And then adding the handler in the array like this :
++ *        (iw_handler) mydriver_ioctl_setrate,             // SIOCSIWRATE
++ *
++ * Using functions and not a registry
++ * ----------------------------------
++ * Another implementation option would have been for every instance to
++ * define a registry (a struct containing all the Wireless Extensions)
++ * and only have a function to commit the registry to the hardware.
++ * 1) This approach can be emulated by the current code, but not
++ * vice versa.
++ * 2) Some drivers don't keep any configuration in the driver, for them
++ * adding such a registry would be a significant bloat.
++ * 3) The code to translate from Wireless Extension to native format is
++ * needed anyway, so it would not reduce significantely the amount of code.
++ * 4) The current approach only selectively translate Wireless Extensions
++ * to native format and only selectively set, whereas the registry approach
++ * would require to translate all WE and set all parameters for any single
++ * change.
++ * 5) For many Wireless Extensions, the GET operation return the current
++ * dynamic value, not the value that was set.
++ *
++ * This header is <net/iw_handler.h>
++ * ---------------------------------
++ * 1) This header is kernel space only and should not be exported to
++ * user space. Headers in "include/linux/" are exported, headers in
++ * "include/net/" are not.
++ *
++ * Mixed 32/64 bit issues
++ * ----------------------
++ * The Wireless Extensions are designed to be 64 bit clean, by using only
++ * datatypes with explicit storage size.
++ * There are some issues related to kernel and user space using different
++ * memory model, and in particular 64bit kernel with 32bit user space.
++ * The problem is related to struct iw_point, that contains a pointer
++ * that *may* need to be translated.
++ * This is quite messy. The new API doesn't solve this problem (it can't),
++ * but is a step in the right direction :
++ * 1) Meta data about each ioctl is easily available, so we know what type
++ * of translation is needed.
++ * 2) The move of data between kernel and user space is only done in a single
++ * place in the kernel, so adding specific hooks in there is possible.
++ * 3) In the long term, it allows to move away from using ioctl as the
++ * user space API.
++ *
++ * So many comments and so few code
++ * --------------------------------
++ * That's a feature. Comments won't bloat the resulting kernel binary.
++ */
++
++/***************************** INCLUDES *****************************/
++
++#include <linux/wireless.h>		/* IOCTL user space API */
++
++/***************************** VERSION *****************************/
++/*
++ * This constant is used to know which version of the driver API is
++ * available. Hopefully, this will be pretty stable and no changes
++ * will be needed...
++ * I just plan to increment with each new version.
++ */
++#define IW_HANDLER_VERSION	2
++
++/**************************** CONSTANTS ****************************/
++
++/* Special error message for the driver to indicate that we
++ * should do a commit after return from the iw_handler */
++#define EIWCOMMIT	EINPROGRESS
++
++/* Flags available in struct iw_request_info */
++#define IW_REQUEST_FLAG_NONE	0x0000	/* No flag so far */
++
++/* Type of headers we know about (basically union iwreq_data) */
++#define IW_HEADER_TYPE_NULL	0	/* Not available */
++#define IW_HEADER_TYPE_CHAR	2	/* char [IFNAMSIZ] */
++#define IW_HEADER_TYPE_UINT	4	/* __u32 */
++#define IW_HEADER_TYPE_FREQ	5	/* struct iw_freq */
++#define IW_HEADER_TYPE_POINT	6	/* struct iw_point */
++#define IW_HEADER_TYPE_PARAM	7	/* struct iw_param */
++#define IW_HEADER_TYPE_ADDR	8	/* struct sockaddr */
++
++/* Handling flags */
++/* Most are not implemented. I just use them as a reminder of some
++ * cool features we might need one day ;-) */
++#define IW_DESCR_FLAG_NONE	0x0000	/* Obvious */
++/* Wrapper level flags */
++#define IW_DESCR_FLAG_DUMP	0x0001	/* Not part of the dump command */
++#define IW_DESCR_FLAG_EVENT	0x0002	/* Generate an event on SET */
++#define IW_DESCR_FLAG_RESTRICT	0x0004	/* GET request is ROOT only */
++/* Driver level flags */
++#define IW_DESCR_FLAG_WAIT	0x0100	/* Wait for driver event */
++
++/****************************** TYPES ******************************/
++
++/* ----------------------- WIRELESS HANDLER ----------------------- */
++/*
++ * A wireless handler is just a standard function, that looks like the
++ * ioctl handler.
++ * We also define there how a handler list look like... As the Wireless
++ * Extension space is quite dense, we use a simple array, which is faster
++ * (that's the perfect hash table ;-).
++ */
++
++/*
++ * Meta data about the request passed to the iw_handler.
++ * Most handlers can safely ignore what's in there.
++ * The 'cmd' field might come handy if you want to use the same handler
++ * for multiple command...
++ * This struct is also my long term insurance. I can add new fields here
++ * without breaking the prototype of iw_handler...
++ */
++struct iw_request_info
++{
++	__u16		cmd;		/* Wireless Extension command */
++	__u16		flags;		/* More to come ;-) */
++};
++
++/*
++ * This is how a function handling a Wireless Extension should look
++ * like (both get and set, standard and private).
++ */
++typedef int (*iw_handler)(struct net_device *dev, struct iw_request_info *info,
++			  union iwreq_data *wrqu, char *extra);
++
++/*
++ * This define all the handler that the driver export.
++ * As you need only one per driver type, please use a static const
++ * shared by all driver instances... Same for the members...
++ * This will be linked from net_device in <linux/netdevice.h>
++ */
++struct iw_handler_def
++{
++	/* Number of handlers defined (more precisely, index of the
++	 * last defined handler + 1) */
++	__u16			num_standard;
++	__u16			num_private;
++	/* Number of private arg description */
++	__u16			num_private_args;
++
++	/* Array of handlers for standard ioctls
++	 * We will call dev->wireless_handlers->standard[ioctl - SIOCSIWNAME]
++	 */
++	iw_handler *		standard;
++
++	/* Array of handlers for private ioctls
++	 * Will call dev->wireless_handlers->private[ioctl - SIOCIWFIRSTPRIV]
++	 */
++	iw_handler *		private;
++
++	/* Arguments of private handler. This one is just a list, so you
++	 * can put it in any order you want and should not leave holes...
++	 * We will automatically export that to user space... */
++	struct iw_priv_args *	private_args;
++
++	/* In the long term, get_wireless_stats will move from
++	 * 'struct net_device' to here, to minimise bloat. */
++};
++
++/* ----------------------- WIRELESS EVENTS ----------------------- */
++/*
++ * Currently we don't support events, so let's just plan for the
++ * future...
++ */
++
++/*
++ * A Wireless Event.
++ */
++// How do we define short header ? We don't want a flag on length.
++// Probably a flag on event ? Highest bit to zero...
++struct iw_event
++{
++	__u16		length;			/* Lenght of this stuff */
++	__u16		event;			/* Wireless IOCTL */
++	union	iwreq_data	header;		/* IOCTL fixed payload */
++	char		extra[0];		/* Optional IOCTL data */
++};
++
++/* ---------------------- IOCTL DESCRIPTION ---------------------- */
++/*
++ * One of the main goal of the new interface is to deal entirely with
++ * user space/kernel space memory move.
++ * For that, we need to know :
++ *	o if iwreq is a pointer or contain the full data
++ *	o what is the size of the data to copy
++ *
++ * For private IOCTLs, we use the same rules as used by iwpriv and
++ * defined in struct iw_priv_args.
++ *
++ * For standard IOCTLs, things are quite different and we need to
++ * use the stuctures below. Actually, this struct is also more
++ * efficient, but that's another story...
++ */
++
++/*
++ * Describe how a standard IOCTL looks like.
++ */
++struct iw_ioctl_description
++{
++	__u8	header_type;		/* NULL, iw_point or other */
++	__u8	token_type;		/* Future */
++	__u16	token_size;		/* Granularity of payload */
++	__u16	min_tokens;		/* Min acceptable token number */
++	__u16	max_tokens;		/* Max acceptable token number */
++	__u32	flags;			/* Special handling of the request */
++};
++
++/* Need to think of short header translation table. Later. */
++
++/**************************** PROTOTYPES ****************************/
++/*
++ * Functions part of the Wireless Extensions (defined in net/core/wireless.c).
++ * Those may be called only within the kernel.
++ */
++
++/* First : function strictly used inside the kernel */
++
++/* Handle /proc/net/wireless, called in net/code/dev.c */
++extern int dev_get_wireless_info(char * buffer, char **start, off_t offset,
++				 int length);
++
++/* Handle IOCTLs, called in net/code/dev.c */
++extern int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd);
++
++/* Second : functions that may be called by driver modules */
++/* None yet */
++
++#endif	/* _LINUX_WIRELESS_H */
+diff -u -p -r --new-file linux/net/core-w12/Makefile linux/net/core/Makefile
+--- linux/net/core-w12/Makefile	Tue Oct 30 15:08:12 2001
++++ linux/net/core/Makefile	Thu Jan 17 11:06:07 2002
+@@ -26,5 +26,8 @@ obj-$(CONFIG_NET) += dev.o dev_mcast.o d
+ obj-$(CONFIG_NETFILTER) += netfilter.o
+ obj-$(CONFIG_NET_DIVERT) += dv.o
+ obj-$(CONFIG_NET_PROFILE) += profile.o
++obj-$(CONFIG_NET_RADIO) += wireless.o
++# Ugly. I wish all wireless drivers were moved in drivers/net/wireless
++obj-$(CONFIG_NET_PCMCIA_RADIO) += wireless.o
+ 
+ include $(TOPDIR)/Rules.make
+diff -u -p -r --new-file linux/net/core-w12/dev.c linux/net/core/dev.c
+--- linux/net/core-w12/dev.c	Wed Nov  7 14:39:36 2001
++++ linux/net/core/dev.c	Thu Jan 17 11:06:07 2002
+@@ -102,6 +102,7 @@
+ #include <linux/module.h>
+ #if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
+ #include <linux/wireless.h>		/* Note : will define WIRELESS_EXT */
++#include <net/iw_handler.h>
+ #endif	/* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
+ #ifdef CONFIG_PLIP
+ extern int plip_init(void);
+@@ -1796,122 +1797,6 @@ static int dev_proc_stats(char *buffer, 
+ #endif	/* CONFIG_PROC_FS */
+ 
+ 
+-#ifdef WIRELESS_EXT
+-#ifdef CONFIG_PROC_FS
+-
+-/*
+- * Print one entry of /proc/net/wireless
+- * This is a clone of /proc/net/dev (just above)
+- */
+-static int sprintf_wireless_stats(char *buffer, struct net_device *dev)
+-{
+-	/* Get stats from the driver */
+-	struct iw_statistics *stats = (dev->get_wireless_stats ?
+-				       dev->get_wireless_stats(dev) :
+-				       (struct iw_statistics *) NULL);
+-	int size;
+-
+-	if (stats != (struct iw_statistics *) NULL) {
+-		size = sprintf(buffer,
+-			       "%6s: %04x  %3d%c  %3d%c  %3d%c  %6d %6d %6d %6d %6d   %6d\n",
+-			       dev->name,
+-			       stats->status,
+-			       stats->qual.qual,
+-			       stats->qual.updated & 1 ? '.' : ' ',
+-			       stats->qual.level,
+-			       stats->qual.updated & 2 ? '.' : ' ',
+-			       stats->qual.noise,
+-			       stats->qual.updated & 4 ? '.' : ' ',
+-			       stats->discard.nwid,
+-			       stats->discard.code,
+-			       stats->discard.fragment,
+-			       stats->discard.retries,
+-			       stats->discard.misc,
+-			       stats->miss.beacon);
+-		stats->qual.updated = 0;
+-	}
+-	else
+-		size = 0;
+-
+-	return size;
+-}
+-
+-/*
+- * Print info for /proc/net/wireless (print all entries)
+- * This is a clone of /proc/net/dev (just above)
+- */
+-static int dev_get_wireless_info(char * buffer, char **start, off_t offset,
+-			  int length)
+-{
+-	int		len = 0;
+-	off_t		begin = 0;
+-	off_t		pos = 0;
+-	int		size;
+-	
+-	struct net_device *	dev;
+-
+-	size = sprintf(buffer,
+-		       "Inter-| sta-|   Quality        |   Discarded packets               | Missed\n"
+-		       " face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon\n"
+-			);
+-	
+-	pos += size;
+-	len += size;
+-
+-	read_lock(&dev_base_lock);
+-	for (dev = dev_base; dev != NULL; dev = dev->next) {
+-		size = sprintf_wireless_stats(buffer + len, dev);
+-		len += size;
+-		pos = begin + len;
+-
+-		if (pos < offset) {
+-			len = 0;
+-			begin = pos;
+-		}
+-		if (pos > offset + length)
+-			break;
+-	}
+-	read_unlock(&dev_base_lock);
+-
+-	*start = buffer + (offset - begin);	/* Start of wanted data */
+-	len -= (offset - begin);		/* Start slop */
+-	if (len > length)
+-		len = length;			/* Ending slop */
+-	if (len < 0)
+-		len = 0;
+-
+-	return len;
+-}
+-#endif	/* CONFIG_PROC_FS */
+-
+-/*
+- *	Allow programatic access to /proc/net/wireless even if /proc
+- *	doesn't exist... Also more efficient...
+- */
+-static inline int dev_iwstats(struct net_device *dev, struct ifreq *ifr)
+-{
+-	/* Get stats from the driver */
+-	struct iw_statistics *stats = (dev->get_wireless_stats ?
+-				       dev->get_wireless_stats(dev) :
+-				       (struct iw_statistics *) NULL);
+-
+-	if (stats != (struct iw_statistics *) NULL) {
+-		struct iwreq *	wrq = (struct iwreq *)ifr;
+-
+-		/* Copy statistics to the user buffer */
+-		if(copy_to_user(wrq->u.data.pointer, stats,
+-				sizeof(struct iw_statistics)))
+-			return -EFAULT;
+-
+-		/* Check if we need to clear the update flag */
+-		if(wrq->u.data.flags != 0)
+-			stats->qual.updated = 0;
+-		return(0);
+-	} else
+-		return -EOPNOTSUPP;
+-}
+-#endif	/* WIRELESS_EXT */
+-
+ /**
+  *	netdev_set_master	-	set up master/slave pair
+  *	@slave: slave device
+@@ -2209,11 +2094,6 @@ static int dev_ifsioc(struct ifreq *ifr,
+ 			notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
+ 			return 0;
+ 
+-#ifdef WIRELESS_EXT
+-		case SIOCGIWSTATS:
+-			return dev_iwstats(dev, ifr);
+-#endif	/* WIRELESS_EXT */
+-
+ 		/*
+ 		 *	Unknown or private ioctl
+ 		 */
+@@ -2239,17 +2119,6 @@ static int dev_ifsioc(struct ifreq *ifr,
+ 				return -EOPNOTSUPP;
+ 			}
+ 
+-#ifdef WIRELESS_EXT
+-			if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
+-				if (dev->do_ioctl) {
+-					if (!netif_device_present(dev))
+-						return -ENODEV;
+-					return dev->do_ioctl(dev, ifr, cmd);
+-				}
+-				return -EOPNOTSUPP;
+-			}
+-#endif	/* WIRELESS_EXT */
+-
+ 	}
+ 	return -EINVAL;
+ }
+@@ -2431,7 +2300,8 @@ int dev_ioctl(unsigned int cmd, void *ar
+ 				}
+ 				dev_load(ifr.ifr_name);
+ 				rtnl_lock();
+-				ret = dev_ifsioc(&ifr, cmd);
++				/* Follow me in net/core/wireless.c */
++				ret = wireless_process_ioctl(&ifr, cmd);
+ 				rtnl_unlock();
+ 				if (!ret && IW_IS_GET(cmd) &&
+ 				    copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+@@ -2856,6 +2726,7 @@ int __init net_dev_init(void)
+ 	proc_net_create("dev", 0, dev_get_info);
+ 	create_proc_read_entry("net/softnet_stat", 0, 0, dev_proc_stats, NULL);
+ #ifdef WIRELESS_EXT
++	/* Available in net/core/wireless.c */
+ 	proc_net_create("wireless", 0, dev_get_wireless_info);
+ #endif	/* WIRELESS_EXT */
+ #endif	/* CONFIG_PROC_FS */
+diff -u -p -r --new-file linux/net/core-w12/wireless.c linux/net/core/wireless.c
+--- linux/net/core-w12/wireless.c	Wed Dec 31 16:00:00 1969
++++ linux/net/core/wireless.c	Mon Jan 21 11:13:23 2002
+@@ -0,0 +1,733 @@
++/*
++ * This file implement the Wireless Extensions APIs.
++ *
++ * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
++ * Copyright (c) 1997-2001 Jean Tourrilhes, All Rights Reserved.
++ *
++ * (As all part of the Linux kernel, this file is GPL)
++ */
++
++/************************** DOCUMENTATION **************************/
++/*
++ * API definition :
++ * --------------
++ * See <linux/wireless.h> for details of the APIs and the rest.
++ *
++ * History :
++ * -------
++ *
++ * v1 - 5.12.01 - Jean II
++ *	o Created this file.
++ *
++ * v2 - 13.12.01 - Jean II
++ *	o Move /proc/net/wireless stuff from net/core/dev.c to here
++ *	o Make Wireless Extension IOCTLs go through here
++ *	o Added iw_handler handling ;-)
++ *	o Added standard ioctl description
++ *	o Initial dumb commit strategy based on orinoco.c
++ */
++
++/***************************** INCLUDES *****************************/
++
++#include <asm/uaccess.h>		/* copy_to_user() */
++#include <linux/config.h>		/* Not needed ??? */
++#include <linux/types.h>		/* off_t */
++#include <linux/netdevice.h>		/* struct ifreq, dev_get_by_name() */
++
++#include <linux/wireless.h>		/* Pretty obvious */
++#include <net/iw_handler.h>		/* New driver API */
++
++/**************************** CONSTANTS ****************************/
++
++/* This will be turned on later on... */
++#undef WE_STRICT_WRITE		/* Check write buffer size */
++
++/* Debuging stuff */
++#undef WE_IOCTL_DEBUG		/* Debug IOCTL API */
++
++/************************* GLOBAL VARIABLES *************************/
++/*
++ * You should not use global variables, because or re-entrancy.
++ * On our case, it's only const, so it's OK...
++ */
++static const struct iw_ioctl_description	standard_ioctl[] = {
++	/* SIOCSIWCOMMIT (internal) */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCGIWNAME */
++	{ IW_HEADER_TYPE_CHAR, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
++	/* SIOCSIWNWID */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, IW_DESCR_FLAG_EVENT},
++	/* SIOCGIWNWID */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
++	/* SIOCSIWFREQ */
++	{ IW_HEADER_TYPE_FREQ, 0, 0, 0, 0, IW_DESCR_FLAG_EVENT},
++	/* SIOCGIWFREQ */
++	{ IW_HEADER_TYPE_FREQ, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
++	/* SIOCSIWMODE */
++	{ IW_HEADER_TYPE_UINT, 0, 0, 0, 0, IW_DESCR_FLAG_EVENT},
++	/* SIOCGIWMODE */
++	{ IW_HEADER_TYPE_UINT, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
++	/* SIOCSIWSENS */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWSENS */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCSIWRANGE */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCGIWRANGE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, sizeof(struct iw_range), IW_DESCR_FLAG_DUMP},
++	/* SIOCSIWPRIV */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCGIWPRIV (handled directly by us) */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCSIWSTATS */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCGIWSTATS (handled directly by us) */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
++	/* SIOCSIWSPY */
++	{ IW_HEADER_TYPE_POINT, 0, sizeof(struct sockaddr), 0, IW_MAX_SPY, 0},
++	/* SIOCGIWSPY */
++	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_SPY, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCSIWAP */
++	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
++	/* SIOCGIWAP */
++	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCGIWAPLIST */
++	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCSIWESSID */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, IW_DESCR_FLAG_EVENT},
++	/* SIOCGIWESSID */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, IW_DESCR_FLAG_DUMP},
++	/* SIOCSIWNICKN */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, 0},
++	/* SIOCGIWNICKN */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* -- hole -- */
++	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCSIWRATE */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWRATE */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCSIWRTS */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWRTS */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCSIWFRAG */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWFRAG */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCSIWTXPOW */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWTXPOW */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCSIWRETRY */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWRETRY */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCSIWENCODE */
++	{ IW_HEADER_TYPE_POINT, 4, 1, 0, IW_ENCODING_TOKEN_MAX, IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT},
++	/* SIOCGIWENCODE */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ENCODING_TOKEN_MAX, IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT},
++	/* SIOCSIWPOWER */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWPOWER */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++};
++
++/* Size (in bytes) of the various private data types */
++char priv_type_size[] = { 0, 1, 1, 0, 4, 4, 0, 0 };
++
++/************************ COMMON SUBROUTINES ************************/
++/*
++ * Stuff that may be used in various place or doesn't fit in one
++ * of the section below.
++ */
++
++/* ---------------------------------------------------------------- */
++/*
++ * Return the driver handler associated with a specific Wireless Extension.
++ * Called from various place, so make sure it remains efficient.
++ */
++static inline iw_handler get_handler(struct net_device *dev,
++				     unsigned int cmd)
++{
++	unsigned int	index;		/* MUST be unsigned */
++
++	/* Check if we have some wireless handlers defined */
++	if(dev->wireless_handlers == NULL)
++		return NULL;
++
++	/* Try as a standard command */
++	index = cmd - SIOCIWFIRST;
++	if(index < dev->wireless_handlers->num_standard)
++		return dev->wireless_handlers->standard[index];
++
++	/* Try as a private command */
++	index = cmd - SIOCIWFIRSTPRIV;
++	if(index < dev->wireless_handlers->num_private)
++		return dev->wireless_handlers->private[index];
++
++	/* Not found */
++	return NULL;
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Get statistics out of the driver
++ */
++static inline struct iw_statistics *get_wireless_stats(struct net_device *dev)
++{
++	return (dev->get_wireless_stats ?
++		dev->get_wireless_stats(dev) :
++		(struct iw_statistics *) NULL);
++	/* In the future, get_wireless_stats may move from 'struct net_device'
++	 * to 'struct iw_handler_def', to de-bloat struct net_device.
++	 * Definitely worse a thought... */
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Call the commit handler in the driver
++ * (if exist and if conditions are right)
++ *
++ * Note : our current commit strategy is currently pretty dumb,
++ * but we will be able to improve on that...
++ * The goal is to try to agreagate as many changes as possible
++ * before doing the commit. Drivers that will define a commit handler
++ * are usually those that need a reset after changing parameters, so
++ * we want to minimise the number of reset.
++ * A cool idea is to use a timer : at each "set" command, we re-set the
++ * timer, when the timer eventually fires, we call the driver.
++ * Hopefully, more on that later.
++ *
++ * Also, I'm waiting to see how many people will complain about the
++ * netif_running(dev) test. I'm open on that one...
++ * Hopefully, the driver will remember to do a commit in "open()" ;-)
++ */
++static inline int call_commit_handler(struct net_device *	dev)
++{
++	if((netif_running(dev)) &&
++	   (dev->wireless_handlers->standard[0] != NULL)) {
++		/* Call the commit handler on the driver */
++		return dev->wireless_handlers->standard[0](dev, NULL,
++							   NULL, NULL);
++	} else
++		return 0;		/* Command completed successfully */
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Number of private arguments
++ */
++static inline int get_priv_size(__u16	args)
++{
++	int	num = args & IW_PRIV_SIZE_MASK;
++	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
++
++	return num * priv_type_size[type];
++}
++
++
++/******************** /proc/net/wireless SUPPORT ********************/
++/*
++ * The /proc/net/wireless file is a human readable user-space interface
++ * exporting various wireless specific statistics from the wireless devices.
++ * This is the most popular part of the Wireless Extensions ;-)
++ *
++ * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
++ * The content of the file is basically the content of "struct iw_statistics".
++ */
++
++#ifdef CONFIG_PROC_FS
++
++/* ---------------------------------------------------------------- */
++/*
++ * Print one entry (line) of /proc/net/wireless
++ */
++static inline int sprintf_wireless_stats(char *buffer, struct net_device *dev)
++{
++	/* Get stats from the driver */
++	struct iw_statistics *stats;
++	int size;
++
++	stats = get_wireless_stats(dev);
++	if (stats != (struct iw_statistics *) NULL) {
++		size = sprintf(buffer,
++			       "%6s: %04x  %3d%c  %3d%c  %3d%c  %6d %6d %6d %6d %6d   %6d\n",
++			       dev->name,
++			       stats->status,
++			       stats->qual.qual,
++			       stats->qual.updated & 1 ? '.' : ' ',
++			       stats->qual.level,
++			       stats->qual.updated & 2 ? '.' : ' ',
++			       stats->qual.noise,
++			       stats->qual.updated & 4 ? '.' : ' ',
++			       stats->discard.nwid,
++			       stats->discard.code,
++			       stats->discard.fragment,
++			       stats->discard.retries,
++			       stats->discard.misc,
++			       stats->miss.beacon);
++		stats->qual.updated = 0;
++	}
++	else
++		size = 0;
++
++	return size;
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Print info for /proc/net/wireless (print all entries)
++ */
++int dev_get_wireless_info(char * buffer, char **start, off_t offset,
++			  int length)
++{
++	int		len = 0;
++	off_t		begin = 0;
++	off_t		pos = 0;
++	int		size;
++	
++	struct net_device *	dev;
++
++	size = sprintf(buffer,
++		       "Inter-| sta-|   Quality        |   Discarded packets               | Missed\n"
++		       " face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon\n"
++			);
++	
++	pos += size;
++	len += size;
++
++	read_lock(&dev_base_lock);
++	for (dev = dev_base; dev != NULL; dev = dev->next) {
++		size = sprintf_wireless_stats(buffer + len, dev);
++		len += size;
++		pos = begin + len;
++
++		if (pos < offset) {
++			len = 0;
++			begin = pos;
++		}
++		if (pos > offset + length)
++			break;
++	}
++	read_unlock(&dev_base_lock);
++
++	*start = buffer + (offset - begin);	/* Start of wanted data */
++	len -= (offset - begin);		/* Start slop */
++	if (len > length)
++		len = length;			/* Ending slop */
++	if (len < 0)
++		len = 0;
++
++	return len;
++}
++#endif	/* CONFIG_PROC_FS */
++
++/************************** IOCTL SUPPORT **************************/
++/*
++ * The original user space API to configure all those Wireless Extensions
++ * is through IOCTLs.
++ * In there, we check if we need to call the new driver API (iw_handler)
++ * or just call the driver ioctl handler.
++ */
++
++/* ---------------------------------------------------------------- */
++/*
++ *	Allow programatic access to /proc/net/wireless even if /proc
++ *	doesn't exist... Also more efficient...
++ */
++static inline int dev_iwstats(struct net_device *dev, struct ifreq *ifr)
++{
++	/* Get stats from the driver */
++	struct iw_statistics *stats;
++
++	stats = get_wireless_stats(dev);
++	if (stats != (struct iw_statistics *) NULL) {
++		struct iwreq *	wrq = (struct iwreq *)ifr;
++
++		/* Copy statistics to the user buffer */
++		if(copy_to_user(wrq->u.data.pointer, stats,
++				sizeof(struct iw_statistics)))
++			return -EFAULT;
++
++		/* Check if we need to clear the update flag */
++		if(wrq->u.data.flags != 0)
++			stats->qual.updated = 0;
++		return 0;
++	} else
++		return -EOPNOTSUPP;
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Export the driver private handler definition
++ * They will be picked up by tools like iwpriv...
++ */
++static inline int ioctl_export_private(struct net_device *	dev,
++				       struct ifreq *		ifr)
++{
++	struct iwreq *				iwr = (struct iwreq *) ifr;
++
++	/* Check if the driver has something to export */
++	if((dev->wireless_handlers->num_private_args == 0) ||
++	   (dev->wireless_handlers->private_args == NULL))
++		return -EOPNOTSUPP;
++
++	/* Check NULL pointer */
++	if(iwr->u.data.pointer == NULL)
++		return -EFAULT;
++#ifdef WE_STRICT_WRITE
++	/* Check if there is enough buffer up there */
++	if(iwr->u.data.length < (SIOCIWLASTPRIV - SIOCIWFIRSTPRIV + 1))
++		return -E2BIG;
++#endif	/* WE_STRICT_WRITE */
++
++	/* Set the number of available ioctls. */
++	iwr->u.data.length = dev->wireless_handlers->num_private_args;
++
++	/* Copy structure to the user buffer. */
++	if (copy_to_user(iwr->u.data.pointer,
++			 dev->wireless_handlers->private_args,
++			 sizeof(struct iw_priv_args) * iwr->u.data.length))
++		return -EFAULT;
++
++	return 0;
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Wrapper to call a standard Wireless Extension handler.
++ * We do various checks and also take care of moving data between
++ * user space and kernel space.
++ */
++static inline int ioctl_standard_call(struct net_device *	dev,
++				      struct ifreq *		ifr,
++				      unsigned int		cmd,
++				      iw_handler		handler)
++{
++	struct iwreq *				iwr = (struct iwreq *) ifr;
++	const struct iw_ioctl_description *	descr;
++	struct iw_request_info			info;
++	int					ret = -EINVAL;
++
++	/* Get the description of the IOCTL */
++	descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
++
++#ifdef WE_IOCTL_DEBUG
++	printk(KERN_DEBUG "%s : Found standard handler for 0x%04X\n",
++	       ifr->ifr_name, cmd);
++	printk(KERN_DEBUG "Header type : %d, token type : %d, token_size : %d, max_token : %d\n", descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
++#endif	/* WE_IOCTL_DEBUG */
++
++	/* Prepare the call */
++	info.cmd = cmd;
++	info.flags = 0;
++
++	/* Check if we have a pointer to user space data or not */
++	if(descr->header_type != IW_HEADER_TYPE_POINT) {
++		/* No extra arguments. Trivial to handle */
++		ret = handler(dev, &info, &(iwr->u), NULL);
++	} else {
++		char *	extra;
++		int	err;
++
++		/* Check what user space is giving us */
++		if(IW_IS_SET(cmd)) {
++			/* Check NULL pointer */
++			if((iwr->u.data.pointer == NULL) &&
++			   (iwr->u.data.length != 0))
++				return -EFAULT;
++			/* Check if number of token fits within bounds */
++			if(iwr->u.data.length > descr->max_tokens)
++				return -E2BIG;
++			if(iwr->u.data.length < descr->min_tokens)
++				return -EINVAL;
++		} else {
++			/* Check NULL pointer */
++			if(iwr->u.data.pointer == NULL)
++				return -EFAULT;
++#ifdef WE_STRICT_WRITE
++			/* Check if there is enough buffer up there */
++			if(iwr->u.data.length < descr->max_tokens)
++				return -E2BIG;
++#endif	/* WE_STRICT_WRITE */
++		}
++
++#ifdef WE_IOCTL_DEBUG
++		printk(KERN_DEBUG "Malloc %d bytes\n",
++		       descr->max_tokens * descr->token_size);
++#endif	/* WE_IOCTL_DEBUG */
++
++		/* Always allocate for max space. Easier, and won't last
++		 * long... */
++		extra = kmalloc(descr->max_tokens * descr->token_size,
++				GFP_KERNEL);
++		if (extra == NULL) {
++			return -ENOMEM;
++		}
++
++		/* If it is a SET, get all the extra data in here */
++		if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
++			err = copy_from_user(extra, iwr->u.data.pointer,
++					     iwr->u.data.length *
++					     descr->token_size);
++			if (err) {
++				kfree(extra);
++				return -EFAULT;
++			}
++#ifdef WE_IOCTL_DEBUG
++			printk(KERN_DEBUG "Got %d bytes\n",
++			       iwr->u.data.length * descr->token_size);
++#endif	/* WE_IOCTL_DEBUG */
++		}
++
++		/* Call the handler */
++		ret = handler(dev, &info, &(iwr->u), extra);
++
++		/* If we have something to return to the user */
++		if (!ret && IW_IS_GET(cmd)) {
++			err = copy_to_user(iwr->u.data.pointer, extra,
++					   iwr->u.data.length *
++					   descr->token_size);
++			if (err)
++				ret =  -EFAULT;				   
++#ifdef WE_IOCTL_DEBUG
++			printk(KERN_DEBUG "Wrote %d bytes\n",
++			       iwr->u.data.length * descr->token_size);
++#endif	/* WE_IOCTL_DEBUG */
++		}
++
++		/* Cleanup - I told you it wasn't that long ;-) */
++		kfree(extra);
++	}
++
++	/* Call commit handler if needed and defined */
++	if(ret == -EIWCOMMIT)
++		ret = call_commit_handler(dev);
++
++	/* Here, we will generate the appropriate event if needed */
++
++	return ret;
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Wrapper to call a private Wireless Extension handler.
++ * We do various checks and also take care of moving data between
++ * user space and kernel space.
++ * It's not as nice and slimline as the standard wrapper. The cause
++ * is struct iw_priv_args, which was not really designed for the
++ * job we are going here.
++ *
++ * IMPORTANT : This function prevent to set and get data on the same
++ * IOCTL and enforce the SET/GET convention. Not doing it would be
++ * far too hairy...
++ * If you need to set and get data at the same time, please don't use
++ * a iw_handler but process it in your ioctl handler (i.e. use the
++ * old driver API).
++ */
++static inline int ioctl_private_call(struct net_device *	dev,
++				     struct ifreq *		ifr,
++				     unsigned int		cmd,
++				     iw_handler		handler)
++{
++	struct iwreq *			iwr = (struct iwreq *) ifr;
++	struct iw_priv_args *		descr = NULL;
++	struct iw_request_info		info;
++	int				extra_size = 0;
++	int				i;
++	int				ret = -EINVAL;
++
++	/* Get the description of the IOCTL */
++	for(i = 0; i < dev->wireless_handlers->num_private_args; i++)
++		if(cmd == dev->wireless_handlers->private_args[i].cmd) {
++			descr = &(dev->wireless_handlers->private_args[i]);
++			break;
++		}
++
++#ifdef WE_IOCTL_DEBUG
++	printk(KERN_DEBUG "%s : Found private handler for 0x%04X\n",
++	       ifr->ifr_name, cmd);
++	if(descr) {
++		printk(KERN_DEBUG "Name %s, set %X, get %X\n",
++		       descr->name, descr->set_args, descr->get_args);
++	}
++#endif	/* WE_IOCTL_DEBUG */
++
++	/* Compute the size of the set/get arguments */
++	if(descr != NULL) {
++		if(IW_IS_SET(cmd)) {
++			/* Size of set arguments */
++			extra_size = get_priv_size(descr->set_args);
++
++			/* Does it fits in iwr ? */
++			if((descr->set_args & IW_PRIV_SIZE_FIXED) &&
++			   (extra_size < IFNAMSIZ))
++				extra_size = 0;
++		} else {
++			/* Size of set arguments */
++			extra_size = get_priv_size(descr->get_args);
++
++			/* Does it fits in iwr ? */
++			if((descr->get_args & IW_PRIV_SIZE_FIXED) &&
++			   (extra_size < IFNAMSIZ))
++				extra_size = 0;
++		}
++	}
++
++	/* Prepare the call */
++	info.cmd = cmd;
++	info.flags = 0;
++
++	/* Check if we have a pointer to user space data or not. */
++	if(extra_size == 0) {
++		/* No extra arguments. Trivial to handle */
++		ret = handler(dev, &info, &(iwr->u), (char *) &(iwr->u));
++	} else {
++		char *	extra;
++		int	err;
++
++		/* Check what user space is giving us */
++		if(IW_IS_SET(cmd)) {
++			/* Check NULL pointer */
++			if((iwr->u.data.pointer == NULL) &&
++			   (iwr->u.data.length != 0))
++				return -EFAULT;
++
++			/* Does it fits within bounds ? */
++			if(iwr->u.data.length > (descr->set_args &
++						 IW_PRIV_SIZE_MASK))
++				return -E2BIG;
++		} else {
++			/* Check NULL pointer */
++			if(iwr->u.data.pointer == NULL)
++				return -EFAULT;
++		}
++
++#ifdef WE_IOCTL_DEBUG
++		printk(KERN_DEBUG "Malloc %d bytes\n", extra_size);
++#endif	/* WE_IOCTL_DEBUG */
++
++		/* Always allocate for max space. Easier, and won't last
++		 * long... */
++		extra = kmalloc(extra_size, GFP_KERNEL);
++		if (extra == NULL) {
++			return -ENOMEM;
++		}
++
++		/* If it is a SET, get all the extra data in here */
++		if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
++			err = copy_from_user(extra, iwr->u.data.pointer,
++					     extra_size);
++			if (err) {
++				kfree(extra);
++				return -EFAULT;
++			}
++#ifdef WE_IOCTL_DEBUG
++			printk(KERN_DEBUG "Got %d elem\n", iwr->u.data.length);
++#endif	/* WE_IOCTL_DEBUG */
++		}
++
++		/* Call the handler */
++		ret = handler(dev, &info, &(iwr->u), extra);
++
++		/* If we have something to return to the user */
++		if (!ret && IW_IS_GET(cmd)) {
++			err = copy_to_user(iwr->u.data.pointer, extra,
++					   extra_size);
++			if (err)
++				ret =  -EFAULT;				   
++#ifdef WE_IOCTL_DEBUG
++			printk(KERN_DEBUG "Wrote %d elem\n",
++			       iwr->u.data.length);
++#endif	/* WE_IOCTL_DEBUG */
++		}
++
++		/* Cleanup - I told you it wasn't that long ;-) */
++		kfree(extra);
++	}
++
++
++	/* Call commit handler if needed and defined */
++	if(ret == -EIWCOMMIT)
++		ret = call_commit_handler(dev);
++
++	return ret;
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Main IOCTl dispatcher. Called from the main networking code
++ * (dev_ioctl() in net/core/dev.c).
++ * Check the type of IOCTL and call the appropriate wrapper...
++ */
++int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
++{
++	struct net_device *dev;
++	iw_handler	handler;
++
++	/* Permissions are already checked in dev_ioctl() before calling us.
++	 * The copy_to/from_user() of ifr is also dealt with in there */
++
++	/* Make sure the device exist */
++	if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
++		return -ENODEV;
++
++	/* A bunch of special cases, then the generic case...
++	 * Note that 'cmd' is already filtered in dev_ioctl() with
++	 * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */
++	switch(cmd) 
++	{
++		case SIOCGIWSTATS:
++			/* Get Wireless Stats */
++			return dev_iwstats(dev, ifr);
++
++		case SIOCGIWPRIV:
++			/* Check if we have some wireless handlers defined */
++			if(dev->wireless_handlers != NULL) {
++				/* We export to user space the definition of
++				 * the private handler ourselves */
++				return ioctl_export_private(dev, ifr);
++			}
++			// ## Fall-through for old API ##
++		default:
++			/* Generic IOCTL */
++			/* Basic check */
++			if (!netif_device_present(dev))
++				return -ENODEV;
++			/* New driver API : try to find the handler */
++			handler = get_handler(dev, cmd);
++			if(handler != NULL) {
++				/* Standard and private are not the same */
++				if(cmd < SIOCIWFIRSTPRIV)
++					return ioctl_standard_call(dev,
++								   ifr,
++								   cmd,
++								   handler);
++				else
++					return ioctl_private_call(dev,
++								  ifr,
++								  cmd,
++								  handler);
++			}
++			/* Old driver API : call driver ioctl handler */
++			if (dev->do_ioctl) {
++				return dev->do_ioctl(dev, ifr, cmd);
++			}
++			return -EOPNOTSUPP;
++	}
++	/* Not reached */
++	return -EINVAL;
++}
diff --git a/recipes/linux/files/iw_handlers.w14-5.diff b/recipes/linux/files/iw_handlers.w14-5.diff
new file mode 100644
index 0000000000..539b160068
--- /dev/null
+++ b/recipes/linux/files/iw_handlers.w14-5.diff
@@ -0,0 +1,838 @@
+diff -u -p -r --new-file linux/include/linux-w13/rtnetlink.h linux/include/linux/rtnetlink.h
+--- linux/include/linux-w13/rtnetlink.h	Thu Jun  6 14:44:08 2002
++++ linux/include/linux/rtnetlink.h	Thu Jun  6 15:47:44 2002
+@@ -440,12 +440,14 @@ enum
+ #define IFLA_COST IFLA_COST
+ 	IFLA_PRIORITY,
+ #define IFLA_PRIORITY IFLA_PRIORITY
+-	IFLA_MASTER
++	IFLA_MASTER,
+ #define IFLA_MASTER IFLA_MASTER
++	IFLA_WIRELESS,		/* Wireless Extension event - see wireless.h */
++#define IFLA_WIRELESS IFLA_WIRELESS
+ };
+ 
+ 
+-#define IFLA_MAX IFLA_MASTER
++#define IFLA_MAX IFLA_WIRELESS
+ 
+ #define IFLA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
+ #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
+diff -u -p -r --new-file linux/include/linux-w13/wireless.h linux/include/linux/wireless.h
+--- linux/include/linux-w13/wireless.h	Thu Jun  6 15:00:28 2002
++++ linux/include/linux/wireless.h	Thu Jun  6 15:47:44 2002
+@@ -1,10 +1,10 @@
+ /*
+  * This file define a set of standard wireless extensions
+  *
+- * Version :	13	6.12.01
++ * Version :	14	25.1.02
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2001 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
+  */
+ 
+ #ifndef _LINUX_WIRELESS_H
+@@ -40,7 +40,7 @@
+  *	# include/linux/netdevice.h (one place)
+  *	# include/linux/proc_fs.h (one place)
+  *
+- * New driver API (2001 -> onward) :
++ * New driver API (2002 -> onward) :
+  * -------------------------------
+  * This file is only concerned with the user space API and common definitions.
+  * The new driver API is defined and documented in :
+@@ -49,6 +49,11 @@
+  * Note as well that /proc/net/wireless implementation has now moved in :
+  *	# include/linux/wireless.c
+  *
++ * Wireless Events (2002 -> onward) :
++ * --------------------------------
++ * Events are defined at the end of this file, and implemented in :
++ *	# include/linux/wireless.c
++ *
+  * Other comments :
+  * --------------
+  * Do not add here things that are redundant with other mechanisms
+@@ -75,7 +80,7 @@
+  * (there is some stuff that will be added in the future...)
+  * I just plan to increment with each new version.
+  */
+-#define WIRELESS_EXT	13
++#define WIRELESS_EXT	14
+ 
+ /*
+  * Changes :
+@@ -141,6 +146,13 @@
+  *	- Document creation of new driver API.
+  *	- Extract union iwreq_data from struct iwreq (for new driver API).
+  *	- Rename SIOCSIWNAME as SIOCSIWCOMMIT
++ *
++ * V13 to V14
++ * ----------
++ *	- Wireless Events support : define struct iw_event
++ *	- Define additional specific event numbers
++ *	- Add "addr" and "param" fields in union iwreq_data
++ *	- AP scanning stuff (SIOCSIWSCAN and friends)
+  */
+ 
+ /**************************** CONSTANTS ****************************/
+@@ -175,6 +187,8 @@
+ #define SIOCSIWAP	0x8B14		/* set access point MAC addresses */
+ #define SIOCGIWAP	0x8B15		/* get access point MAC addresses */
+ #define SIOCGIWAPLIST	0x8B17		/* get list of access point in range */
++#define SIOCSIWSCAN	0x8B18		/* trigger scanning */
++#define SIOCGIWSCAN	0x8B19		/* get scanning results */
+ 
+ /* 802.11 specific support */
+ #define SIOCSIWESSID	0x8B1A		/* set ESSID (network name) */
+@@ -238,6 +252,15 @@
+ #define IW_IS_SET(cmd)	(!((cmd) & 0x1))
+ #define IW_IS_GET(cmd)	((cmd) & 0x1)
+ 
++/* ----------------------- WIRELESS EVENTS ----------------------- */
++/* Those are *NOT* ioctls, do not issue request on them !!! */
++/* Most events use the same identifier as ioctl requests */
++
++#define IWEVTXDROP	0x8C00		/* Packet dropped to excessive retry */
++#define IWEVQUAL	0x8C01		/* Quality part of statistics */
++
++#define IWEVFIRST	0x8C00
++
+ /* ------------------------- PRIVATE INFO ------------------------- */
+ /*
+  * The following is used with SIOCGIWPRIV. It allow a driver to define
+@@ -340,6 +363,19 @@
+ #define IW_RETRY_MAX		0x0002	/* Value is a maximum */
+ #define IW_RETRY_RELATIVE	0x0004	/* Value is not in seconds/ms/us */
+ 
++/* Scanning request flags */
++#define IW_SCAN_DEFAULT		0x0000	/* Default scan of the driver */
++#define IW_SCAN_ALL_ESSID	0x0001	/* Scan all ESSIDs */
++#define IW_SCAN_THIS_ESSID	0x0002	/* Scan only this ESSID */
++#define IW_SCAN_ALL_FREQ	0x0004	/* Scan all Frequencies */
++#define IW_SCAN_THIS_FREQ	0x0008	/* Scan only this Frequency */
++#define IW_SCAN_ALL_MODE	0x0010	/* Scan all Modes */
++#define IW_SCAN_THIS_MODE	0x0020	/* Scan only this Mode */
++#define IW_SCAN_ALL_RATE	0x0040	/* Scan all Bit-Rates */
++#define IW_SCAN_THIS_RATE	0x0080	/* Scan only this Bit-Rate */
++/* Maximum size of returned data */
++#define IW_SCAN_MAX_DATA	4096	/* In bytes */
++
+ /****************************** TYPES ******************************/
+ 
+ /* --------------------------- SUBTYPES --------------------------- */
+@@ -466,9 +502,12 @@ union	iwreq_data
+ 
+ 	struct iw_point	encoding;	/* Encoding stuff : tokens */
+ 	struct iw_param	power;		/* PM duration/timeout */
++	struct iw_quality qual;		/* Quality part of statistics */
+ 
+ 	struct sockaddr	ap_addr;	/* Access point address */
++	struct sockaddr	addr;		/* Destination address (hw) */
+ 
++	struct iw_param	param;		/* Other small parameters */
+ 	struct iw_point	data;		/* Other large parameters */
+ };
+ 
+@@ -595,5 +634,36 @@ struct	iw_priv_args
+ 	__u16		get_args;	/* Type and number of args */
+ 	char		name[IFNAMSIZ];	/* Name of the extension */
+ };
++
++/* ----------------------- WIRELESS EVENTS ----------------------- */
++/*
++ * Wireless events are carried through the rtnetlink socket to user
++ * space. They are encapsulated in the IFLA_WIRELESS field of
++ * a RTM_NEWLINK message.
++ */
++
++/*
++ * A Wireless Event. Contains basically the same data as the ioctl...
++ */
++struct iw_event
++{
++	__u16		len;			/* Real lenght of this stuff */
++	__u16		cmd;			/* Wireless IOCTL */
++	union iwreq_data	u;		/* IOCTL fixed payload */
++};
++
++/* Size of the Event prefix (including padding and alignement junk) */
++#define IW_EV_LCP_LEN	(sizeof(struct iw_event) - sizeof(union iwreq_data))
++/* Size of the various events */
++#define IW_EV_CHAR_LEN	(IW_EV_LCP_LEN + IFNAMSIZ)
++#define IW_EV_UINT_LEN	(IW_EV_LCP_LEN + sizeof(__u32))
++#define IW_EV_FREQ_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_freq))
++#define IW_EV_POINT_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_point))
++#define IW_EV_PARAM_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_param))
++#define IW_EV_ADDR_LEN	(IW_EV_LCP_LEN + sizeof(struct sockaddr))
++#define IW_EV_QUAL_LEN	(IW_EV_LCP_LEN + sizeof(struct iw_quality))
++
++/* Note : in the case of iw_point, the extra data will come at the
++ * end of the event */
+ 
+ #endif	/* _LINUX_WIRELESS_H */
+diff -u -p -r --new-file linux/include/net-w13/iw_handler.h linux/include/net/iw_handler.h
+--- linux/include/net-w13/iw_handler.h	Thu Jun  6 15:06:16 2002
++++ linux/include/net/iw_handler.h	Thu Jun  6 15:48:06 2002
+@@ -1,10 +1,10 @@
+ /*
+  * This file define the new driver API for Wireless Extensions
+  *
+- * Version :	2	6.12.01
++ * Version :	3	17.1.02
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 2001 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 2001-2002 Jean Tourrilhes, All Rights Reserved.
+  */
+ 
+ #ifndef _IW_HANDLER_H
+@@ -33,7 +33,7 @@
+  *	o The user space interface is tied to ioctl because of the use
+  *	  copy_to/from_user.
+  *
+- * New driver API (2001 -> onward) :
++ * New driver API (2002 -> onward) :
+  * -------------------------------
+  * The new driver API is just a bunch of standard functions (handlers),
+  * each handling a specific Wireless Extension. The driver just export
+@@ -206,7 +206,18 @@
+  * will be needed...
+  * I just plan to increment with each new version.
+  */
+-#define IW_HANDLER_VERSION	2
++#define IW_HANDLER_VERSION	3
++
++/*
++ * Changes :
++ *
++ * V2 to V3
++ * --------
++ *	- Move event definition in <linux/wireless.h>
++ *	- Add Wireless Event support :
++ *		o wireless_send_event() prototype
++ *		o iwe_stream_add_event/point() inline functions
++ */
+ 
+ /**************************** CONSTANTS ****************************/
+ 
+@@ -225,6 +236,7 @@
+ #define IW_HEADER_TYPE_POINT	6	/* struct iw_point */
+ #define IW_HEADER_TYPE_PARAM	7	/* struct iw_param */
+ #define IW_HEADER_TYPE_ADDR	8	/* struct sockaddr */
++#define IW_HEADER_TYPE_QUAL	9	/* struct iw_quality */
+ 
+ /* Handling flags */
+ /* Most are not implemented. I just use them as a reminder of some
+@@ -233,7 +245,8 @@
+ /* Wrapper level flags */
+ #define IW_DESCR_FLAG_DUMP	0x0001	/* Not part of the dump command */
+ #define IW_DESCR_FLAG_EVENT	0x0002	/* Generate an event on SET */
+-#define IW_DESCR_FLAG_RESTRICT	0x0004	/* GET request is ROOT only */
++#define IW_DESCR_FLAG_RESTRICT	0x0004	/* GET : request is ROOT only */
++				/* SET : Omit payload from generated iwevent */
+ /* Driver level flags */
+ #define IW_DESCR_FLAG_WAIT	0x0100	/* Wait for driver event */
+ 
+@@ -303,25 +316,6 @@ struct iw_handler_def
+ 	 * 'struct net_device' to here, to minimise bloat. */
+ };
+ 
+-/* ----------------------- WIRELESS EVENTS ----------------------- */
+-/*
+- * Currently we don't support events, so let's just plan for the
+- * future...
+- */
+-
+-/*
+- * A Wireless Event.
+- */
+-// How do we define short header ? We don't want a flag on length.
+-// Probably a flag on event ? Highest bit to zero...
+-struct iw_event
+-{
+-	__u16		length;			/* Lenght of this stuff */
+-	__u16		event;			/* Wireless IOCTL */
+-	union	iwreq_data	header;		/* IOCTL fixed payload */
+-	char		extra[0];		/* Optional IOCTL data */
+-};
+-
+ /* ---------------------- IOCTL DESCRIPTION ---------------------- */
+ /*
+  * One of the main goal of the new interface is to deal entirely with
+@@ -369,6 +363,88 @@ extern int dev_get_wireless_info(char * 
+ extern int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd);
+ 
+ /* Second : functions that may be called by driver modules */
+-/* None yet */
+ 
+-#endif	/* _LINUX_WIRELESS_H */
++/* Send a single event to user space */
++extern void wireless_send_event(struct net_device *	dev,
++				unsigned int		cmd,
++				union iwreq_data *	wrqu,
++				char *			extra);
++
++/* We may need a function to send a stream of events to user space.
++ * More on that later... */
++
++/************************* INLINE FUNTIONS *************************/
++/*
++ * Function that are so simple that it's more efficient inlining them
++ */
++
++/*------------------------------------------------------------------*/
++/*
++ * Wrapper to add an Wireless Event to a stream of events.
++ */
++static inline char *
++iwe_stream_add_event(char *	stream,		/* Stream of events */
++		     char *	ends,		/* End of stream */
++		     struct iw_event *iwe,	/* Payload */
++		     int	event_len)	/* Real size of payload */
++{
++	/* Check if it's possible */
++	if((stream + event_len) < ends) {
++		iwe->len = event_len;
++		memcpy(stream, (char *) iwe, event_len);
++		stream += event_len;
++	}
++	return stream;
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Wrapper to add an short Wireless Event containing a pointer to a
++ * stream of events.
++ */
++static inline char *
++iwe_stream_add_point(char *	stream,		/* Stream of events */
++		     char *	ends,		/* End of stream */
++		     struct iw_event *iwe,	/* Payload */
++		     char *	extra)
++{
++	int	event_len = IW_EV_POINT_LEN + iwe->u.data.length;
++	/* Check if it's possible */
++	if((stream + event_len) < ends) {
++		iwe->len = event_len;
++		memcpy(stream, (char *) iwe, IW_EV_POINT_LEN);
++		memcpy(stream + IW_EV_POINT_LEN, extra, iwe->u.data.length);
++		stream += event_len;
++	}
++	return stream;
++}
++
++/*------------------------------------------------------------------*/
++/*
++ * Wrapper to add a value to a Wireless Event in a stream of events.
++ * Be careful, this one is tricky to use properly :
++ * At the first run, you need to have (value = event + IW_EV_LCP_LEN).
++ */
++static inline char *
++iwe_stream_add_value(char *	event,		/* Event in the stream */
++		     char *	value,		/* Value in event */
++		     char *	ends,		/* End of stream */
++		     struct iw_event *iwe,	/* Payload */
++		     int	event_len)	/* Real size of payload */
++{
++	/* Don't duplicate LCP */
++	event_len -= IW_EV_LCP_LEN;
++
++	/* Check if it's possible */
++	if((value + event_len) < ends) {
++		/* Add new value */
++		memcpy(value, (char *) iwe + IW_EV_LCP_LEN, event_len);
++		value += event_len;
++		/* Patch LCP */
++		iwe->len = value - event;
++		memcpy(event, (char *) iwe, IW_EV_LCP_LEN);
++	}
++	return value;
++}
++
++#endif	/* _IW_HANDLER_H */
+diff -u -p -r --new-file linux/net/netsyms-w13.c linux/net/netsyms.c
+--- linux/net/netsyms-w13.c	Thu Jun  6 15:46:34 2002
++++ linux/net/netsyms.c	Thu Jun  6 15:47:44 2002
+@@ -588,4 +588,10 @@ EXPORT_SYMBOL(register_gifconf);
+ EXPORT_SYMBOL(net_call_rx_atomic);
+ EXPORT_SYMBOL(softnet_data);
+ 
++#if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
++/* Don't include the whole header mess for a single function */
++extern void wireless_send_event(struct net_device *dev, unsigned int cmd, union iwreq_data *wrqu, char *extra);
++EXPORT_SYMBOL(wireless_send_event);
++#endif	/* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
++
+ #endif  /* CONFIG_NET */
+diff -u -p -r --new-file linux/net/core/wireless-w13.c linux/net/core/wireless.c
+--- linux/net/core/wireless-w13.c	Thu Jun  6 15:46:45 2002
++++ linux/net/core/wireless.c	Thu Jun  6 15:48:06 2002
+@@ -2,7 +2,7 @@
+  * This file implement the Wireless Extensions APIs.
+  *
+  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+- * Copyright (c) 1997-2001 Jean Tourrilhes, All Rights Reserved.
++ * Copyright (c) 1997-2002 Jean Tourrilhes, All Rights Reserved.
+  *
+  * (As all part of the Linux kernel, this file is GPL)
+  */
+@@ -25,6 +25,16 @@
+  *	o Added iw_handler handling ;-)
+  *	o Added standard ioctl description
+  *	o Initial dumb commit strategy based on orinoco.c
++ *
++ * v3 - 19.12.01 - Jean II
++ *	o Make sure we don't go out of standard_ioctl[] in ioctl_standard_call
++ *	o Add event dispatcher function
++ *	o Add event description
++ *	o Propagate events as rtnetlink IFLA_WIRELESS option
++ *	o Generate event on selected SET requests
++ *
++ * v4 - 18.04.01 - Jean II
++ *	o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1
+  */
+ 
+ /***************************** INCLUDES *****************************/
+@@ -33,6 +43,7 @@
+ #include <linux/config.h>		/* Not needed ??? */
+ #include <linux/types.h>		/* off_t */
+ #include <linux/netdevice.h>		/* struct ifreq, dev_get_by_name() */
++#include <linux/rtnetlink.h>		/* rtnetlink stuff */
+ 
+ #include <linux/wireless.h>		/* Pretty obvious */
+ #include <net/iw_handler.h>		/* New driver API */
+@@ -44,14 +55,23 @@
+ 
+ /* Debuging stuff */
+ #undef WE_IOCTL_DEBUG		/* Debug IOCTL API */
++#undef WE_EVENT_DEBUG		/* Debug Event dispatcher */
++
++/* Options */
++#define WE_EVENT_NETLINK	/* Propagate events using rtnetlink */
++#define WE_SET_EVENT		/* Generate an event on some set commands */
+ 
+ /************************* GLOBAL VARIABLES *************************/
+ /*
+  * You should not use global variables, because or re-entrancy.
+  * On our case, it's only const, so it's OK...
+  */
++/*
++ * Meta-data about all the standard Wireless Extension request we
++ * know about.
++ */
+ static const struct iw_ioctl_description	standard_ioctl[] = {
+-	/* SIOCSIWCOMMIT (internal) */
++	/* SIOCSIWCOMMIT */
+ 	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWNAME */
+ 	{ IW_HEADER_TYPE_CHAR, 0, 0, 0, 0, IW_DESCR_FLAG_DUMP},
+@@ -99,18 +119,18 @@ static const struct iw_ioctl_description
+ 	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+ 	/* SIOCGIWAPLIST */
+ 	{ IW_HEADER_TYPE_POINT, 0, (sizeof(struct sockaddr) + sizeof(struct iw_quality)), 0, IW_MAX_AP, 0},
+-	/* -- hole -- */
+-	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+-	/* -- hole -- */
+-	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
++	/* SIOCSIWSCAN */
++	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
++	/* SIOCGIWSCAN */
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_SCAN_MAX_DATA, 0},
+ 	/* SIOCSIWESSID */
+-	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, IW_DESCR_FLAG_EVENT},
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, IW_DESCR_FLAG_EVENT},
+ 	/* SIOCGIWESSID */
+-	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, IW_DESCR_FLAG_DUMP},
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, IW_DESCR_FLAG_DUMP},
+ 	/* SIOCSIWNICKN */
+-	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, 0},
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, 0},
+ 	/* SIOCGIWNICKN */
+-	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE, 0},
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ESSID_MAX_SIZE + 1, 0},
+ 	/* -- hole -- */
+ 	{ IW_HEADER_TYPE_NULL, 0, 0, 0, 0, 0},
+ 	/* -- hole -- */
+@@ -136,7 +156,7 @@ static const struct iw_ioctl_description
+ 	/* SIOCGIWRETRY */
+ 	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ 	/* SIOCSIWENCODE */
+-	{ IW_HEADER_TYPE_POINT, 4, 1, 0, IW_ENCODING_TOKEN_MAX, IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT},
++	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ENCODING_TOKEN_MAX, IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT},
+ 	/* SIOCGIWENCODE */
+ 	{ IW_HEADER_TYPE_POINT, 0, 1, 0, IW_ENCODING_TOKEN_MAX, IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT},
+ 	/* SIOCSIWPOWER */
+@@ -144,9 +164,38 @@ static const struct iw_ioctl_description
+ 	/* SIOCGIWPOWER */
+ 	{ IW_HEADER_TYPE_PARAM, 0, 0, 0, 0, 0},
+ };
++static const int standard_ioctl_num = (sizeof(standard_ioctl) /
++				       sizeof(struct iw_ioctl_description));
++
++/*
++ * Meta-data about all the additional standard Wireless Extension events
++ * we know about.
++ */
++static const struct iw_ioctl_description	standard_event[] = {
++	/* IWEVTXDROP */
++	{ IW_HEADER_TYPE_ADDR, 0, 0, 0, 0, 0},
++	/* IWEVQUAL */
++	{ IW_HEADER_TYPE_QUAL, 0, 0, 0, 0, 0},
++};
++static const int standard_event_num = (sizeof(standard_event) /
++				       sizeof(struct iw_ioctl_description));
+ 
+ /* Size (in bytes) of the various private data types */
+-char priv_type_size[] = { 0, 1, 1, 0, 4, 4, 0, 0 };
++static const char priv_type_size[] = { 0, 1, 1, 0, 4, 4, 0, 0 };
++
++/* Size (in bytes) of various events */
++static const int event_type_size[] = {
++	IW_EV_LCP_LEN,
++	0,
++	IW_EV_CHAR_LEN,
++	0,
++	IW_EV_UINT_LEN,
++	IW_EV_FREQ_LEN,
++	IW_EV_POINT_LEN,		/* Without variable payload */
++	IW_EV_PARAM_LEN,
++	IW_EV_ADDR_LEN,
++	IW_EV_QUAL_LEN,
++};
+ 
+ /************************ COMMON SUBROUTINES ************************/
+ /*
+@@ -162,7 +211,8 @@ char priv_type_size[] = { 0, 1, 1, 0, 4,
+ static inline iw_handler get_handler(struct net_device *dev,
+ 				     unsigned int cmd)
+ {
+-	unsigned int	index;		/* MUST be unsigned */
++	/* Don't "optimise" the following variable, it will crash */
++	unsigned int	index;		/* *MUST* be unsigned */
+ 
+ 	/* Check if we have some wireless handlers defined */
+ 	if(dev->wireless_handlers == NULL)
+@@ -269,9 +319,9 @@ static inline int sprintf_wireless_stats
+ 			       stats->status,
+ 			       stats->qual.qual,
+ 			       stats->qual.updated & 1 ? '.' : ' ',
+-			       stats->qual.level,
++			       ((__u8) stats->qual.level),
+ 			       stats->qual.updated & 2 ? '.' : ' ',
+-			       stats->qual.noise,
++			       ((__u8) stats->qual.noise),
+ 			       stats->qual.updated & 4 ? '.' : ' ',
+ 			       stats->discard.nwid,
+ 			       stats->discard.code,
+@@ -423,12 +473,14 @@ static inline int ioctl_standard_call(st
+ 	int					ret = -EINVAL;
+ 
+ 	/* Get the description of the IOCTL */
++	if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
++		return -EOPNOTSUPP;
+ 	descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
+ 
+ #ifdef WE_IOCTL_DEBUG
+-	printk(KERN_DEBUG "%s : Found standard handler for 0x%04X\n",
++	printk(KERN_DEBUG "%s (WE) : Found standard handler for 0x%04X\n",
+ 	       ifr->ifr_name, cmd);
+-	printk(KERN_DEBUG "Header type : %d, token type : %d, token_size : %d, max_token : %d\n", descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
++	printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
+ #endif	/* WE_IOCTL_DEBUG */
+ 
+ 	/* Prepare the call */
+@@ -437,8 +489,16 @@ static inline int ioctl_standard_call(st
+ 
+ 	/* Check if we have a pointer to user space data or not */
+ 	if(descr->header_type != IW_HEADER_TYPE_POINT) {
++
+ 		/* No extra arguments. Trivial to handle */
+ 		ret = handler(dev, &info, &(iwr->u), NULL);
++
++#ifdef WE_SET_EVENT
++		/* Generate an event to notify listeners of the change */
++		if((descr->flags & IW_DESCR_FLAG_EVENT) &&
++		   ((ret == 0) || (ret == -EIWCOMMIT)))
++			wireless_send_event(dev, cmd, &(iwr->u), NULL);
++#endif	/* WE_SET_EVENT */
+ 	} else {
+ 		char *	extra;
+ 		int	err;
+@@ -466,8 +526,8 @@ static inline int ioctl_standard_call(st
+ 		}
+ 
+ #ifdef WE_IOCTL_DEBUG
+-		printk(KERN_DEBUG "Malloc %d bytes\n",
+-		       descr->max_tokens * descr->token_size);
++		printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
++		       dev->name, descr->max_tokens * descr->token_size);
+ #endif	/* WE_IOCTL_DEBUG */
+ 
+ 		/* Always allocate for max space. Easier, and won't last
+@@ -488,7 +548,8 @@ static inline int ioctl_standard_call(st
+ 				return -EFAULT;
+ 			}
+ #ifdef WE_IOCTL_DEBUG
+-			printk(KERN_DEBUG "Got %d bytes\n",
++			printk(KERN_DEBUG "%s (WE) : Got %d bytes\n",
++			       dev->name,
+ 			       iwr->u.data.length * descr->token_size);
+ #endif	/* WE_IOCTL_DEBUG */
+ 		}
+@@ -504,11 +565,26 @@ static inline int ioctl_standard_call(st
+ 			if (err)
+ 				ret =  -EFAULT;				   
+ #ifdef WE_IOCTL_DEBUG
+-			printk(KERN_DEBUG "Wrote %d bytes\n",
++			printk(KERN_DEBUG "%s (WE) : Wrote %d bytes\n",
++			       dev->name,
+ 			       iwr->u.data.length * descr->token_size);
+ #endif	/* WE_IOCTL_DEBUG */
+ 		}
+ 
++#ifdef WE_SET_EVENT
++		/* Generate an event to notify listeners of the change */
++		if((descr->flags & IW_DESCR_FLAG_EVENT) &&
++		   ((ret == 0) || (ret == -EIWCOMMIT))) {
++			if(descr->flags & IW_DESCR_FLAG_RESTRICT)
++				/* If the event is restricted, don't
++				 * export the payload */
++				wireless_send_event(dev, cmd, &(iwr->u), NULL);
++			else
++				wireless_send_event(dev, cmd, &(iwr->u),
++						    extra);
++		}
++#endif	/* WE_SET_EVENT */
++
+ 		/* Cleanup - I told you it wasn't that long ;-) */
+ 		kfree(extra);
+ 	}
+@@ -558,11 +634,12 @@ static inline int ioctl_private_call(str
+ 		}
+ 
+ #ifdef WE_IOCTL_DEBUG
+-	printk(KERN_DEBUG "%s : Found private handler for 0x%04X\n",
++	printk(KERN_DEBUG "%s (WE) : Found private handler for 0x%04X\n",
+ 	       ifr->ifr_name, cmd);
+ 	if(descr) {
+-		printk(KERN_DEBUG "Name %s, set %X, get %X\n",
+-		       descr->name, descr->set_args, descr->get_args);
++		printk(KERN_DEBUG "%s (WE) : Name %s, set %X, get %X\n",
++		       dev->name, descr->name,
++		       descr->set_args, descr->get_args);
+ 	}
+ #endif	/* WE_IOCTL_DEBUG */
+ 
+@@ -617,7 +694,8 @@ static inline int ioctl_private_call(str
+ 		}
+ 
+ #ifdef WE_IOCTL_DEBUG
+-		printk(KERN_DEBUG "Malloc %d bytes\n", extra_size);
++		printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
++		       dev->name, extra_size);
+ #endif	/* WE_IOCTL_DEBUG */
+ 
+ 		/* Always allocate for max space. Easier, and won't last
+@@ -636,7 +714,8 @@ static inline int ioctl_private_call(str
+ 				return -EFAULT;
+ 			}
+ #ifdef WE_IOCTL_DEBUG
+-			printk(KERN_DEBUG "Got %d elem\n", iwr->u.data.length);
++			printk(KERN_DEBUG "%s (WE) : Got %d elem\n",
++			       dev->name, iwr->u.data.length);
+ #endif	/* WE_IOCTL_DEBUG */
+ 		}
+ 
+@@ -650,8 +729,8 @@ static inline int ioctl_private_call(str
+ 			if (err)
+ 				ret =  -EFAULT;				   
+ #ifdef WE_IOCTL_DEBUG
+-			printk(KERN_DEBUG "Wrote %d elem\n",
+-			       iwr->u.data.length);
++			printk(KERN_DEBUG "%s (WE) : Wrote %d elem\n",
++			       dev->name, iwr->u.data.length);
+ #endif	/* WE_IOCTL_DEBUG */
+ 		}
+ 
+@@ -730,4 +809,178 @@ int wireless_process_ioctl(struct ifreq 
+ 	}
+ 	/* Not reached */
+ 	return -EINVAL;
++}
++
++/************************* EVENT PROCESSING *************************/
++/*
++ * Process events generated by the wireless layer or the driver.
++ * Most often, the event will be propagated through rtnetlink
++ */
++
++#ifdef WE_EVENT_NETLINK
++/* "rtnl" is defined in net/core/rtnetlink.c, but we need it here.
++ * It is declared in <linux/rtnetlink.h> */
++
++/* ---------------------------------------------------------------- */
++/*
++ * Fill a rtnetlink message with our event data.
++ * Note that we propage only the specified event and don't dump the
++ * current wireless config. Dumping the wireless config is far too
++ * expensive (for each parameter, the driver need to query the hardware).
++ */
++static inline int rtnetlink_fill_iwinfo(struct sk_buff *	skb,
++					struct net_device *	dev,
++					int			type,
++					char *			event,
++					int			event_len)
++{
++	struct ifinfomsg *r;
++	struct nlmsghdr  *nlh;
++	unsigned char	 *b = skb->tail;
++
++	nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r));
++	r = NLMSG_DATA(nlh);
++	r->ifi_family = AF_UNSPEC;
++	r->ifi_type = dev->type;
++	r->ifi_index = dev->ifindex;
++	r->ifi_flags = dev->flags;
++	r->ifi_change = 0;	/* Wireless changes don't affect those flags */
++
++	/* Add the wireless events in the netlink packet */
++	RTA_PUT(skb, IFLA_WIRELESS,
++		event_len, event);
++
++	nlh->nlmsg_len = skb->tail - b;
++	return skb->len;
++
++nlmsg_failure:
++rtattr_failure:
++	skb_trim(skb, b - skb->data);
++	return -1;
++}
++
++/* ---------------------------------------------------------------- */
++/*
++ * Create and broadcast and send it on the standard rtnetlink socket
++ * This is a pure clone rtmsg_ifinfo() in net/core/rtnetlink.c
++ * Andrzej Krzysztofowicz mandated that I used a IFLA_XXX field
++ * within a RTM_NEWLINK event.
++ */
++static inline void rtmsg_iwinfo(struct net_device *	dev,
++				char *			event,
++				int			event_len)
++{
++	struct sk_buff *skb;
++	int size = NLMSG_GOODSIZE;
++
++	skb = alloc_skb(size, GFP_ATOMIC);
++	if (!skb)
++		return;
++
++	if (rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK,
++				  event, event_len) < 0) {
++		kfree_skb(skb);
++		return;
++	}
++	NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
++	netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_ATOMIC);
++}
++#endif	/* WE_EVENT_NETLINK */
++
++/* ---------------------------------------------------------------- */
++/*
++ * Main event dispatcher. Called from other parts and drivers.
++ * Send the event on the apropriate channels.
++ * May be called from interrupt context.
++ */
++void wireless_send_event(struct net_device *	dev,
++			 unsigned int		cmd,
++			 union iwreq_data *	wrqu,
++			 char *			extra)
++{
++	const struct iw_ioctl_description *	descr = NULL;
++	int extra_len = 0;
++	struct iw_event  *event;		/* Mallocated whole event */
++	int event_len;				/* Its size */
++	int hdr_len;				/* Size of the event header */
++	/* Don't "optimise" the following variable, it will crash */
++	unsigned	cmd_index;		/* *MUST* be unsigned */
++
++	/* Get the description of the IOCTL */
++	if(cmd <= SIOCIWLAST) {
++		cmd_index = cmd - SIOCIWFIRST;
++		if(cmd_index < standard_ioctl_num)
++			descr = &(standard_ioctl[cmd_index]);
++	} else {
++		cmd_index = cmd - IWEVFIRST;
++		if(cmd_index < standard_event_num)
++			descr = &(standard_event[cmd_index]);
++	}
++	/* Don't accept unknown events */
++	if(descr == NULL) {
++		/* Note : we don't return an error to the driver, because
++		 * the driver would not know what to do about it. It can't
++		 * return an error to the user, because the event is not
++		 * initiated by a user request.
++		 * The best the driver could do is to log an error message.
++		 * We will do it ourselves instead...
++		 */
++	  	printk(KERN_ERR "%s (WE) : Invalid Wireless Event (0x%04X)\n",
++		       dev->name, cmd);
++		return;
++	}
++#ifdef WE_EVENT_DEBUG
++	printk(KERN_DEBUG "%s (WE) : Got event 0x%04X\n",
++	       dev->name, cmd);
++	printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
++#endif	/* WE_EVENT_DEBUG */
++
++	/* Check extra parameters and set extra_len */
++	if(descr->header_type == IW_HEADER_TYPE_POINT) {
++		/* Check if number of token fits within bounds */
++		if(wrqu->data.length > descr->max_tokens) {
++		  	printk(KERN_ERR "%s (WE) : Wireless Event too big (%d)\n", dev->name, wrqu->data.length);
++			return;
++		}
++		if(wrqu->data.length < descr->min_tokens) {
++		  	printk(KERN_ERR "%s (WE) : Wireless Event too small (%d)\n", dev->name, wrqu->data.length);
++			return;
++		}
++		/* Calculate extra_len - extra is NULL for restricted events */
++		if(extra != NULL)
++			extra_len = wrqu->data.length * descr->token_size;
++#ifdef WE_EVENT_DEBUG
++		printk(KERN_DEBUG "%s (WE) : Event 0x%04X, tokens %d, extra_len %d\n", dev->name, cmd, wrqu->data.length, extra_len);
++#endif	/* WE_EVENT_DEBUG */
++	}
++
++	/* Total length of the event */
++	hdr_len = event_type_size[descr->header_type];
++	event_len = hdr_len + extra_len;
++
++#ifdef WE_EVENT_DEBUG
++	printk(KERN_DEBUG "%s (WE) : Event 0x%04X, hdr_len %d, event_len %d\n", dev->name, cmd, hdr_len, event_len);
++#endif	/* WE_EVENT_DEBUG */
++
++	/* Create temporary buffer to hold the event */
++	event = kmalloc(event_len, GFP_ATOMIC);
++	if(event == NULL)
++		return;
++
++	/* Fill event */
++	event->len = event_len;
++	event->cmd = cmd;
++	memcpy(&event->u, wrqu, hdr_len - IW_EV_LCP_LEN);
++	if(extra != NULL)
++		memcpy(((char *) event) + hdr_len, extra, extra_len);
++
++#ifdef WE_EVENT_NETLINK
++	/* rtnetlink event channel */
++	rtmsg_iwinfo(dev, (char *) event, event_len);
++#endif	/* WE_EVENT_NETLINK */
++
++	/* Cleanup */
++	kfree(event);
++
++	return;		/* Always success, I guess ;-) */
+ }
diff --git a/recipes/linux/files/linux-2.4-cpufreq.patch b/recipes/linux/files/linux-2.4-cpufreq.patch
new file mode 100644
index 0000000000..c3526bb30d
--- /dev/null
+++ b/recipes/linux/files/linux-2.4-cpufreq.patch
@@ -0,0 +1,20 @@
+Index: include/linux/cpufreq.h
+===================================================================
+RCS file: /cvs/linux/kernel/include/linux/cpufreq.h,v
+retrieving revision 1.4
+diff -u -r1.4 cpufreq.h
+--- linux/include/linux/cpufreq.h	23 Aug 2002 22:18:47 -0000	1.4
++++ linux/include/linux/cpufreq.h	29 Apr 2004 08:44:18 -0000
+@@ -16,9 +16,9 @@
+ #include <linux/notifier.h>
+ 
+ #ifndef CONFIG_SMP
+-#define cpufreq_current(cpu)	((void)(cpu), __cpufreq_cur)
+-#define cpufreq_max(cpu)	((void)(cpu), __cpufreq_max)
+-#define cpufreq_min(cpu)	((void)(cpu), __cpufreq_min)
++#define cpufreq_current(cpu)	(__cpufreq_cur)
++#define cpufreq_max(cpu)	(__cpufreq_max)
++#define cpufreq_min(cpu)	(__cpufreq_min)
+ #else
+ /*
+  * Should be something like:
diff --git a/recipes/linux/files/linux-2.4-mmc-debugging.patch b/recipes/linux/files/linux-2.4-mmc-debugging.patch
new file mode 100644
index 0000000000..6cde9e8ed2
--- /dev/null
+++ b/recipes/linux/files/linux-2.4-mmc-debugging.patch
@@ -0,0 +1,15 @@
+--- kernel/include/linux/mmc/mmc_protocol.h	2005-04-09 17:30:57.930462521 +0200
++++ /tmp/mmc_protocol.h	2005-04-09 17:30:33.649097537 +0200
+@@ -273,10 +273,10 @@
+ #define START_MMC_DEBUG(n) do { if (n <= g_mmc_debug)
+ #define END_MMC_DEBUG      } while (0)
+ #else
+ #define MMC_DEBUG(n, args...)
+-#define START_MMC_DEBUG(n)
+-#define END_MMC_DEBUG
++#define START_MMC_DEBUG(n) do { if (0)
++#define END_MMC_DEBUG      } while (0)
+ #endif /* CONFIG_MMC_DEBUG */
+ 
+ #endif  /* MMC_MMC_PROTOCOL_H */
+ 
diff --git a/recipes/linux/files/linux-2.4-no-short-loads.patch b/recipes/linux/files/linux-2.4-no-short-loads.patch
new file mode 100644
index 0000000000..f2d6c74224
--- /dev/null
+++ b/recipes/linux/files/linux-2.4-no-short-loads.patch
@@ -0,0 +1,18 @@
+Index: arch/arm/Makefile
+===================================================================
+RCS file: /cvs/linux/kernel/arch/arm/Makefile,v
+retrieving revision 1.47
+diff -u -r1.47 Makefile
+--- linux/arch/arm/Makefile	9 Jul 2003 14:10:56 -0000	1.47
++++ linux/arch/arm/Makefile	28 Apr 2004 21:11:04 -0000
+@@ -60,8 +60,8 @@
+ tune-$(CONFIG_CPU_XSCALE)	:=-mtune=xscale
+ #tune-$(CONFIG_CPU_XSCALE)	:=-mtune=strongarm
+ 
+-CFLAGS_BOOT	:=$(apcs-y) $(arch-y) $(tune-y) -mshort-load-bytes -msoft-float -Uarm
+-CFLAGS		+=$(apcs-y) $(arch-y) $(tune-y) -mshort-load-bytes -msoft-float -Uarm
++CFLAGS_BOOT	:=$(apcs-y) $(arch-y) $(tune-y) -msoft-float -Uarm
++CFLAGS		+=$(apcs-y) $(arch-y) $(tune-y) -msoft-float -Uarm
+ AFLAGS		+=$(apcs-y) $(arch-y) -msoft-float
+ 
+ ifeq ($(CONFIG_CPU_26),y)
diff --git a/recipes/linux/files/linux-2.4-usb-gadget.patch b/recipes/linux/files/linux-2.4-usb-gadget.patch
new file mode 100644
index 0000000000..0864ee98f5
--- /dev/null
+++ b/recipes/linux/files/linux-2.4-usb-gadget.patch
@@ -0,0 +1,29506 @@
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/Documentation/Configure.help kernel/Documentation/Configure.help
+--- /tmp/kernel/Documentation/Configure.help	2005-04-22 17:52:12.265476882 +0200
++++ kernel/Documentation/Configure.help	2005-04-22 17:57:15.940717930 +0200
+@@ -23701,6 +23701,163 @@
+   brave people.  System crashes and other bad things are likely to occur if
+   you use this driver.  If in doubt, select N.
+ 
++CONFIG_USB_GADGET
++  USB is a master/slave protocol, organized with one master
++  host (such as a PC) controlling up to 127 peripheral devices.
++  The USB hardware is asymmetric, which makes it easier to set up:
++  you can't connect two "to-the-host" connectors to each other.
++
++  Linux can run in the host, or in the peripheral.  In both cases
++  you need a low level bus controller driver, and some software
++  talking to it.  Peripheral controllers are often discrete silicon,
++  or are integrated with the CPU in a microcontroller.  The more
++  familiar host side controllers have names like like "EHCI", "OHCI",
++  or "UHCI", and are usually integrated into southbridges on PC
++  motherboards.
++
++  Enable this configuration option if you want to run Linux inside
++  a USB peripheral device.  Configure one hardware driver for your
++  peripheral/device side bus controller, and a "gadget driver" for
++  your peripheral protocol.  (If you use modular gadget drivers,
++  you may configure more than one.)
++
++  If in doubt, say "N" and don't enable these drivers; most people
++  don't have this kind of hardware (except maybe inside Linux PDAs).
++
++CONFIG_USB_GADGET_NET2280
++  NetChip 2280 is a PCI based USB peripheral controller which
++  supports both full and high speed USB 2.0 data transfers.  
++           
++  It has six configurable endpoints, as well as endpoint zero
++  (for control transfers) and several endpoints with dedicated
++  functions.
++
++  Say "y" to link the driver statically, or "m" to build a
++  dynamically linked module called "net2280" and force all
++  gadget drivers to also be dynamically linked.
++
++CONFIG_USB_GADGET_GOKU
++  The Toshiba TC86C001 is a PCI device which includes controllers
++  for full speed USB devices, IDE, I2C, SIO, plus a USB host (OHCI).
++  
++  The device controller has three configurable (bulk or interrupt)
++  endpoints, plus endpoint zero (for control transfers).
++
++  Say "y" to link the driver statically, or "m" to build a
++  dynamically linked module called "goku_udc" and force all
++  gadget drivers to also be dynamically linked.
++
++CONFIG_USB_GADGET_PXA2XX
++  Intel's PXA 2xx series XScale ARM-5TE processors include
++  an integrated full speed USB 1.1 device controller.
++
++  It has fifteen fixed-function endpoints, as well as endpoint
++  zero (for control transfers).
++
++  Say "y" to link the driver statically, or "m" to build a
++  dynamically linked module called "pxa2xx_udc" and force all
++  gadget drivers to also be dynamically linked.
++
++CONFIG_USB_GADGET_SUPERH
++  Some Renesas SuperH processors (SH7705, SH7727...) include an
++  integrated high speed USB 1.1 device controller.
++
++  It has three fixed-function endpoints, as well as endpoint zero (for
++  control transfers).
++
++  Say "y" to link the driver statically, or "m" to build a
++  dynamically linked module called "superh_udc" and force all
++  gadget drivers to also be dynamically linked.
++
++CONFIG_USB_ZERO
++  Gadget Zero is a two-configuration device.  It either sinks and
++  sources bulk data; or it loops back a configurable number of
++  transfers.  It also implements control requests, for "chapter 9"
++  conformance.  The driver needs only two bulk-capable endpoints, so
++  it can work on top of most device-side usb controllers.  It's
++  useful for testing, and is also a working example showing how
++  USB "gadget drivers" can be written.
++
++  Make this be the first driver you try using on top of any new
++  USB peripheral controller driver.  Then you can use host-side
++  test software, like the "usbtest" driver, to put your hardware
++  and its driver through a basic set of functional tests.
++
++  Gadget Zero also works with the host-side "usb-skeleton" driver,
++  and with many kinds of host-side test software.  You may need
++  to tweak product and vendor IDs before host software knows about
++  this device, and arrange to select an appropriate configuration.
++
++  Say "y" to link the driver statically, or "m" to build a
++  dynamically linked module called "g_zero".
++
++CONFIG_USB_ETH
++  This driver implements Ethernet style communication, in either
++  of two ways:
++          
++   - The "Communication Device Class" (CDC) Ethernet Control Model.
++     That protocol is often avoided with pure Ethernet adapters, in
++     favor of simpler vendor-specific hardware, but is widely
++     supported by firmware for smart network devices.
++
++   - On hardware can't implement that protocol, a simpler approach
++     is used, placing fewer demands on USB.
++
++   Within the USB device, this gadget driver exposes a network device
++   "usbX", where X depends on what other networking devices you have.
++   Treat it like a two-node Ethernet link:  host, and gadget.
++
++   The Linux-USB host-side "usbnet" driver interoperates with this
++   driver, so that deep I/O queues can be supported.  On 2.4 kernels,
++   use "CDCEther" instead, if you're using the CDC option. That CDC
++   mode should also interoperate with standard CDC Ethernet class
++   drivers on other host operating systems.
++
++   Say "y" to link the driver statically, or "m" to build a
++   dynamically linked module called "g_ether".
++
++CONFIG_USB_ETH_RNDIS
++  Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
++  and Microsoft provides redistributable binary RNDIS drivers for
++  older versions of Windows.
++
++  If you say "y" here, the Ethernet gadget driver will try to provide
++  a second device configuration, supporting RNDIS to talk to such
++  Microsoft USB hosts.
++
++CONFIG_USB_FILE_STORAGE
++  The File-backed Storage Gadget acts as a USB Mass Storage
++  disk drive.  As its storage repository it can use a regular
++  file or a block device (in much the same way as the "loop"
++  device driver), specified as a module parameter.
++
++CONFIG_USB_FILE_STORAGE_TEST
++  Say "y" to generate the larger testing version of the
++  File-backed Storage Gadget, useful for probing the
++  behavior of USB Mass Storage hosts.  Not needed for
++  normal operation.
++
++CONFIG_USB_ETH_RNDIS
++  Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
++  and Microsoft provides redistributable binary RNDIS drivers for
++  older versions of Windows.
++
++  If you say "y" here, the Ethernet gadget driver will try to provide
++  a second device configuration, supporting RNDIS to talk to such
++  Microsoft USB hosts.
++
++CONFIG_USB_FILE_STORAGE
++  The File-backed Storage Gadget acts as a USB Mass Storage
++  disk drive.  As its storage repository it can use a regular
++  file or a block device (in much the same way as the "loop"
++  device driver), specified as a module parameter.
++
++CONFIG_USB_FILE_STORAGE_TEST
++  Say "y" to generate the larger testing version of the
++  File-backed Storage Gadget, useful for probing the
++  behavior of USB Mass Storage hosts.  Not needed for
++  normal operation.
++
+ Winbond W83977AF IrDA Device Driver
+ CONFIG_WINBOND_FIR
+   Say Y here if you want to build IrDA support for the Winbond
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/Makefile kernel/Makefile
+--- /tmp/kernel/Makefile	2005-04-22 17:52:12.362461090 +0200
++++ kernel/Makefile	2005-04-22 17:53:19.374549284 +0200
+@@ -196,6 +196,7 @@
+ DRIVERS-$(CONFIG_HAMRADIO) += drivers/net/hamradio/hamradio.o
+ DRIVERS-$(CONFIG_TC) += drivers/tc/tc.a
+ DRIVERS-$(CONFIG_USB) += drivers/usb/usbdrv.o
++DRIVERS-$(CONFIG_USB_GADGET) += drivers/usb/gadget/built-in.o
+ DRIVERS-$(CONFIG_LAB) += drivers/bootldr/labmod.o
+ DRIVERS-$(CONFIG_INPUT) += drivers/input/inputdrv.o
+ DRIVERS-$(CONFIG_I2O) += drivers/message/i2o/i2o.o
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/Makefile kernel/drivers/Makefile
+--- /tmp/kernel/drivers/Makefile	2005-04-22 17:52:12.728401503 +0200
++++ kernel/drivers/Makefile	2005-04-22 17:53:19.523525026 +0200
+@@ -27,6 +27,7 @@
+ subdir-$(CONFIG_MAC)		+= macintosh
+ subdir-$(CONFIG_PPC)		+= macintosh
+ subdir-$(CONFIG_USB)		+= usb
++subdir-$(CONFIG_USB_GADGET)    += usb/gadget
+ subdir-$(CONFIG_INPUT)		+= input
+ subdir-$(CONFIG_PHONE)		+= telephony
+ subdir-$(CONFIG_SGI)		+= sgi
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/Config.in kernel/drivers/usb/Config.in
+--- /tmp/kernel/drivers/usb/Config.in	2005-04-22 17:52:20.663109467 +0200
++++ kernel/drivers/usb/Config.in	2005-04-22 17:53:19.376548959 +0200
+@@ -120,4 +120,7 @@
+    dep_tristate '  USB Auerswald ISDN support (EXPERIMENTAL)' CONFIG_USB_AUERSWALD $CONFIG_USB $CONFIG_EXPERIMENTAL
+    dep_tristate '  Tieman Voyager USB Braille display support (EXPERIMENTAL)' CONFIG_USB_BRLVGER $CONFIG_USB $CONFIG_EXPERIMENTAL
+ fi
++
++source drivers/usb/gadget/Config.in
++
+ endmenu
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/Config.in kernel/drivers/usb/gadget/Config.in
+--- /tmp/kernel/drivers/usb/gadget/Config.in	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/Config.in	2005-04-22 17:53:19.403544563 +0200
+@@ -0,0 +1,128 @@
++#
++# USB device-side configuration
++# for 2.4 kbuild, drivers/usb/gadget/Config.in
++#
++# Long term, this likely doesn't all belong in one directory
++# Plan to split it up eventually.
++#
++mainmenu_option next_comment
++comment 'Support for USB gadgets'
++
++tristate 'Support for USB Gadgets' CONFIG_USB_GADGET
++if [ "$CONFIG_USB_GADGET" = "y" -o "$CONFIG_USB_GADGET" = "m" ]; then
++  
++  #
++  # really want _exactly one_ device controller driver at a time,
++  # since they control compile options for gadget drivers.
++  #
++  choice 'USB Peripheral Controller Driver' "\
++	Intel-PXA2xx/IXP4xx		CONFIG_USB_GADGET_PXA2XX \
++	National-N9603/N9604		CONFIG_USB_GADGET_N9604 \
++	NetChip-2280			CONFIG_USB_GADGET_NET2280 \
++	Renesas-SH7705/7727		CONFIG_USB_GADGET_SUPERH  \
++	Toshiba-TC86C001(Goku-S)	CONFIG_USB_GADGET_GOKU \
++	" NetChip-2280
++
++  define_tristate CONFIG_USB_GADGET_CONTROLLER n
++
++  if [ "$CONFIG_ARCH_PXA" = "y" -o "$CONFIG_ARCH_IXP425" = "y" ] ; then
++     if [ "$CONFIG_USB_GADGET_PXA2XX" = "y" ] ; then
++       define_tristate CONFIG_USB_PXA2XX $CONFIG_USB_GADGET
++       define_tristate CONFIG_USB_GADGET_CONTROLLER $CONFIG_USB_PXA2XX
++     fi
++  fi
++  if [ "$CONFIG_PCI" = "y" -a "$CONFIG_USB_GADGET_NET2280" = "y" ] ; then
++    define_tristate CONFIG_USB_NET2280 $CONFIG_USB_GADGET
++    define_tristate CONFIG_USB_GADGET_CONTROLLER $CONFIG_USB_NET2280
++  fi
++  if [ "$CONFIG_SUPERH" = "y" -a "$CONFIG_USB_GADGET_SUPERH" = "y" ] ; then
++    define_tristate CONFIG_USB_SUPERH $CONFIG_USB_GADGET
++    define_tristate CONFIG_USB_GADGET_CONTROLLER $CONFIG_USB_SUPERH
++  fi
++  if [ "$CONFIG_PCI" = "y" -a "$CONFIG_USB_GADGET_GOKU" = "y" ] ; then
++    define_tristate CONFIG_USB_GOKU $CONFIG_USB_GADGET
++    define_tristate CONFIG_USB_GADGET_CONTROLLER $CONFIG_USB_GOKU
++  fi
++  if [ "$CONFIG_USB_GADGET_N9604" = "y" ] ; then
++    define_tristate CONFIG_USB_N9604 $CONFIG_USB_GADGET
++    define_tristate CONFIG_USB_GADGET_CONTROLLER $CONFIG_USB_N9604
++  fi
++
++  # or any other controller that supports high speed transfers ...
++  define_bool CONFIG_USB_GADGET_DUALSPEED $CONFIG_USB_GADGET_NET2280
++
++  if [ "$CONFIG_USB_GADGET_CONTROLLER" = "y" -o "$CONFIG_USB_GADGET_CONTROLLER" = "m" ] ; then
++
++  #
++  # no reason not to enable more than one gadget driver module, but
++  # for static linking that would make no sense since the usb model
++  # has exactly one of these upstream connections and only one
++  # lowest-level driver can control it.
++  #
++  # gadget drivers are compiled to work on specific hardware, since
++  #
++  # (a) gadget driver need hardware-specific configuration, like what
++  #     endpoint names and numbers to use, maxpacket sizes, etc
++  #
++  # (b) specific hardware features like iso endpoints may be required
++  #
++  comment 'USB Gadget Drivers'
++
++  # FIXME when drivers all use #ifdef CONFIG_USB_GADGET_* tests,
++  # just remove all this driver-specific define_bool logic
++
++  dep_tristate '  Gadget Zero (DEVELOPMENT)' CONFIG_USB_ZERO $CONFIG_USB_GADGET_CONTROLLER
++  dep_tristate '  Ethernet Gadget (EXPERIMENTAL)' CONFIG_USB_ETH $CONFIG_USB_GADGET_CONTROLLER $CONFIG_NET
++  if [ "$CONFIG_USB_ETH" = "y" -o "$CONFIG_USB_ETH" = "m" ] ; then
++    bool       '    RNDIS support (EXPERIMENTAL)' CONFIG_USB_ETH_RNDIS
++  fi
++  dep_tristate '  Gadget Filesystem API (EXPERIMENTAL)' CONFIG_USB_GADGETFS $CONFIG_USB_GADGET_CONTROLLER
++  dep_tristate '  File-backed Storage Gadget (DEVELOPMENT)' CONFIG_USB_FILE_STORAGE $CONFIG_USB_GADGET_CONTROLLER
++  dep_mbool '    File-backed Storage Gadget test mode' CONFIG_USB_FILE_STORAGE_TEST $CONFIG_USB_FILE_STORAGE
++  dep_tristate '  Serial Gadget (EXPERIMENTAL)' CONFIG_USB_G_SERIAL $CONFIG_USB_GADGET_CONTROLLER
++  
++
++    # enforce the "only one statically linked gadget driver" rule
++
++    if [ "$CONFIG_USB_ZERO" = "y" ]; then
++      # zero = y
++      define_tristate CONFIG_USB_ETH n
++      define_tristate CONFIG_USB_GADGETFS n
++      define_tristate CONFIG_USB_FILE_STORAGE n
++      define_tristate CONFIG_USB_G_SERIAL n
++    fi
++
++    if [ "$CONFIG_USB_ETH" = "y" ]; then
++      define_tristate CONFIG_USB_ZERO n
++      # eth = y
++      define_tristate CONFIG_USB_GADGETFS n
++      define_tristate CONFIG_USB_FILE_STORAGE n
++      define_tristate CONFIG_USB_G_SERIAL n
++    fi
++
++    if [ "$CONFIG_USB_GADGETFS" = "y" ]; then
++      define_tristate CONFIG_USB_ZERO n
++      define_tristate CONFIG_USB_ETH n
++      # gadgetfs = y
++      define_tristate CONFIG_USB_FILE_STORAGE n
++      define_tristate CONFIG_USB_G_SERIAL n
++    fi
++
++    if [ "$CONFIG_USB_FILE_STORAGE" = "y" ]; then
++      define_tristate CONFIG_USB_ZERO n
++      define_tristate CONFIG_USB_ETH n
++      define_tristate CONFIG_USB_GADGETFS n
++      # file_storage = y
++      define_tristate CONFIG_USB_G_SERIAL n
++    fi
++
++    if [ "$CONFIG_USB_G_SERIAL" = "y" ]; then
++      define_tristate CONFIG_USB_ZERO n
++      define_tristate CONFIG_USB_ETH n
++      define_tristate CONFIG_USB_GADGETFS n
++      define_tristate CONFIG_USB_FILE_STORAGE n
++      # g_serial = y
++    fi
++  fi
++fi
++endmenu
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/Makefile kernel/drivers/usb/gadget/Makefile
+--- /tmp/kernel/drivers/usb/gadget/Makefile	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/Makefile	2005-04-22 17:53:19.405544237 +0200
+@@ -0,0 +1,58 @@
++#
++# Makefile for USB peripheral controller and gadget drivers
++# for kbuild 2.4
++#
++
++# for static linking
++O_TARGET	:= built-in.o
++
++list-multi			:= g_zero.o g_ether.o gadgetfs.o g_file_storage.o g_serial.o
++
++obj-$(CONFIG_USB_NET2280)	+= net2280.o
++obj-$(CONFIG_USB_PXA2XX)	+= pxa2xx_udc.o
++obj-$(CONFIG_USB_GOKU)		+= goku_udc.o
++obj-$(CONFIG_USB_SUPERH)	+= superh_udc.o
++obj-$(CONFIG_USB_N9604)		+= n9604.o
++
++# only one of these may be statically linked ...
++controller-$(CONFIG_USB_NET2280)	+= net2280.o
++controller-$(CONFIG_USB_PXA2XX)		+= pxa2xx_udc.o
++controller-$(CONFIG_USB_GOKU)		+= goku_udc.o
++controller-$(CONFIG_USB_SUPERH)		+= superh_udc.o
++controller-$(CONFIG_USB_N9604)		+= n9604.o
++
++# ... and only one of these, too; kbuild/kconfig don't help though.
++g_zero-objs			:= zero.o usbstring.o config.o epautoconf.o
++obj-$(CONFIG_USB_ZERO)		+= g_zero.o
++
++g_ether-objs			:= ether.o usbstring.o config.o epautoconf.o
++obj-$(CONFIG_USB_ETH)		+= g_ether.o
++
++ifeq ($(CONFIG_USB_ETH_RNDIS),y)
++	g_ether-objs		+= rndis.o
++endif
++
++gadgetfs-objs			:= inode.o usbstring.o
++obj-$(CONFIG_USB_GADGETFS)	+= gadgetfs.o
++
++g_file_storage-objs		:= file_storage.o usbstring.o config.o \
++						epautoconf.o
++obj-$(CONFIG_USB_FILE_STORAGE)	+= g_file_storage.o
++
++g_serial-objs			:= gserial.o usbstring.o epautoconf.o
++obj-$(CONFIG_USB_G_SERIAL)	+= g_serial.o
++
++export-objs :=			$(controller-y) $(controller-m)
++
++include $(TOPDIR)/Rules.make
++
++g_zero.o: $(g_zero-objs)
++	$(LD) -r -o $@ $(g_zero-objs)
++g_ether.o: $(g_ether-objs)
++	$(LD) -r -o $@ $(g_ether-objs)
++gadgetfs.o: $(gadgetfs-objs)
++	$(LD) -r -o $@ $(gadgetfs-objs)
++g_file_storage.o: $(g_file_storage-objs)
++	$(LD) -r -o $@ $(g_file_storage-objs)
++g_serial.o: $(g_serial-objs)
++	$(LD) -r -o $@ $(g_serial-objs)
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/config.c kernel/drivers/usb/gadget/config.c
+--- /tmp/kernel/drivers/usb/gadget/config.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/config.c	2005-04-22 17:53:19.408543749 +0200
+@@ -0,0 +1,116 @@
++/*
++ * usb/gadget/config.c -- simplify building config descriptors
++ *
++ * Copyright (C) 2003 David Brownell
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/list.h>
++#include <linux/string.h>
++#include <asm/byteorder.h>
++
++#include <linux/usb_ch9.h>
++
++
++/**
++ * usb_descriptor_fillbuf - fill buffer with descriptors
++ * @buf: Buffer to be filled
++ * @buflen: Size of buf
++ * @src: Array of descriptor pointers, terminated by null pointer.
++ *
++ * Copies descriptors into the buffer, returning the length or a
++ * negative error code if they can't all be copied.  Useful when
++ * assembling descriptors for an associated set of interfaces used
++ * as part of configuring a composite device; or in other cases where
++ * sets of descriptors need to be marshaled.
++ */
++int
++usb_descriptor_fillbuf(void *buf, unsigned buflen,
++		const struct usb_descriptor_header **src)
++{
++	u8	*dest = buf;
++
++	if (!src)
++		return -EINVAL;
++
++	/* fill buffer from src[] until null descriptor ptr */
++	for (; 0 != *src; src++) {
++		unsigned		len = (*src)->bLength;
++
++		if (len > buflen)
++			return -EINVAL;
++		memcpy(dest, *src, len);
++		buflen -= len;
++		dest += len;
++	}
++	return dest - (u8 *)buf;
++}
++
++
++/**
++ * usb_gadget_config_buf - builts a complete configuration descriptor
++ * @config: Header for the descriptor, including characteristics such
++ *	as power requirements and number of interfaces.
++ * @desc: Null-terminated vector of pointers to the descriptors (interface,
++ *	endpoint, etc) defining all functions in this device configuration.
++ * @buf: Buffer for the resulting configuration descriptor.
++ * @length: Length of buffer.  If this is not big enough to hold the
++ *	entire configuration descriptor, an error code will be returned.
++ *
++ * This copies descriptors into the response buffer, building a descriptor
++ * for that configuration.  It returns the buffer length or a negative
++ * status code.  The config.wTotalLength field is set to match the length
++ * of the result, but other descriptor fields (including power usage and
++ * interface count) must be set by the caller.
++ *
++ * Gadget drivers could use this when constructing a config descriptor
++ * in response to USB_REQ_GET_DESCRIPTOR.  They will need to patch the
++ * resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
++ */
++int usb_gadget_config_buf(
++	const struct usb_config_descriptor	*config,
++	void					*buf,
++	unsigned				length,
++	const struct usb_descriptor_header	**desc
++)
++{
++	struct usb_config_descriptor		*cp = buf;
++	int					len;
++
++	/* config descriptor first */
++	if (length < USB_DT_CONFIG_SIZE || !desc)
++		return -EINVAL;
++	*cp = *config; 
++
++	/* then interface/endpoint/class/vendor/... */
++	len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8*)buf,
++			length - USB_DT_CONFIG_SIZE, desc);
++	if (len < 0)
++		return len;
++	len += USB_DT_CONFIG_SIZE;
++	if (len > 0xffff)
++		return -EINVAL;
++
++	/* patch up the config descriptor */
++	cp->bLength = USB_DT_CONFIG_SIZE;
++	cp->bDescriptorType = USB_DT_CONFIG;
++	cp->wTotalLength = cpu_to_le16(len);
++	cp->bmAttributes |= USB_CONFIG_ATT_ONE;
++	return len;
++}
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/epautoconf.c kernel/drivers/usb/gadget/epautoconf.c
+--- /tmp/kernel/drivers/usb/gadget/epautoconf.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/epautoconf.c	2005-04-22 17:53:19.410543423 +0200
+@@ -0,0 +1,311 @@
++/*
++ * epautoconf.c -- endpoint autoconfiguration for usb gadget drivers
++ *
++ * Copyright (C) 2004 David Brownell
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/types.h>
++#include <linux/list.h>
++#include <linux/errno.h>
++#include <linux/ctype.h>
++#include <linux/string.h>
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include <asm/byteorder.h>
++
++#include "gadget_chips.h"
++
++
++/* we must assign addresses for configurable endpoints (like net2280) */
++static __initdata unsigned epnum;
++
++// #define MANY_ENDPOINTS
++#ifdef MANY_ENDPOINTS
++/* more than 15 configurable endpoints */
++static __initdata unsigned in_epnum;
++#endif
++
++
++/*
++ * This should work with endpoints from controller drivers sharing the
++ * same endpoint naming convention.  By example:
++ *
++ *	- ep1, ep2, ... address is fixed, not direction or type
++ *	- ep1in, ep2out, ... address and direction are fixed, not type
++ *	- ep1-bulk, ep2-bulk, ... address and type are fixed, not direction
++ *	- ep1in-bulk, ep2out-iso, ... all three are fixed
++ *	- ep-* ... no functionality restrictions
++ *
++ * Type suffixes are "-bulk", "-iso", or "-int".  Numbers are decimal.
++ * Less common restrictions are implied by gadget_is_*().
++ *
++ * NOTE:  each endpoint is unidirectional, as specified by its USB
++ * descriptor; and isn't specific to a configuration or altsetting.
++ */
++static int __init
++ep_matches (
++	struct usb_gadget		*gadget,
++	struct usb_ep			*ep,
++	struct usb_endpoint_descriptor	*desc
++)
++{
++	u8		type;
++	const char	*tmp;
++	u16		max;
++
++	/* endpoint already claimed? */
++	if (0 != ep->driver_data)
++		return 0;
++		
++	/* only support ep0 for portable CONTROL traffic */
++	type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
++	if (USB_ENDPOINT_XFER_CONTROL == type)
++		return 0;
++
++	/* some other naming convention */
++	if ('e' != ep->name[0])
++		return 0;
++
++	/* type-restriction:  "-iso", "-bulk", or "-int".
++	 * direction-restriction:  "in", "out".
++	 */
++	if ('-' != ep->name[2]) {
++		tmp = strrchr (ep->name, '-');
++		if (tmp) {
++			switch (type) {
++			case USB_ENDPOINT_XFER_INT:
++				/* bulk endpoints handle interrupt transfers,
++				 * except the toggle-quirky iso-synch kind
++				 */
++				if ('s' == tmp[2])	// == "-iso"
++					return 0;
++				/* for now, avoid PXA "interrupt-in";
++				 * it's documented as never using DATA1.
++				 */
++				if (gadget_is_pxa (gadget)
++						&& 'i' == tmp [1])
++					return 0;
++				break;
++			case USB_ENDPOINT_XFER_BULK:
++				if ('b' != tmp[1])	// != "-bulk"
++					return 0;
++				break;
++			case USB_ENDPOINT_XFER_ISOC:
++				if ('s' != tmp[2])	// != "-iso"
++					return 0;
++			}
++		} else {
++			tmp = ep->name + strlen (ep->name);
++		}
++
++		/* direction-restriction:  "..in-..", "out-.." */
++		tmp--;
++		if (!isdigit (*tmp)) {
++			if (desc->bEndpointAddress & USB_DIR_IN) {
++				if ('n' != *tmp)
++					return 0;
++			} else {
++				if ('t' != *tmp)
++					return 0;
++			}
++		}
++	}
++
++	/* endpoint maxpacket size is an input parameter, except for bulk
++	 * where it's an output parameter representing the full speed limit.
++	 * the usb spec fixes high speed bulk maxpacket at 512 bytes.
++	 */
++	max = 0x7ff & le16_to_cpup (&desc->wMaxPacketSize);
++	switch (type) {
++	case USB_ENDPOINT_XFER_INT:
++		/* INT:  limit 64 bytes full speed, 1024 high speed */
++		if (!gadget->is_dualspeed && max > 64)
++			return 0;
++		/* FALLTHROUGH */
++
++	case USB_ENDPOINT_XFER_ISOC:
++		/* ISO:  limit 1023 bytes full speed, 1024 high speed */
++		if (ep->maxpacket < max)
++			return 0;
++		if (!gadget->is_dualspeed && max > 1023)
++			return 0;
++
++		/* BOTH:  "high bandwidth" works only at high speed */
++		if ((desc->wMaxPacketSize & __constant_cpu_to_le16(3<<11))) {
++			if (!gadget->is_dualspeed)
++				return 0;
++			/* configure your hardware with enough buffering!! */
++		}
++		break;
++	}
++
++	/* MATCH!! */
++
++	/* report address */
++	if (isdigit (ep->name [2])) {
++		u8	num = simple_strtol (&ep->name [2], NULL, 10);
++		desc->bEndpointAddress |= num;
++#ifdef	MANY_ENDPOINTS
++	} else if (desc->bEndpointAddress & USB_DIR_IN) {
++		if (++in_epnum > 15)
++			return 0;
++		desc->bEndpointAddress = USB_DIR_IN | in_epnum;
++#endif
++	} else {
++		if (++epnum > 15)
++			return 0;
++		desc->bEndpointAddress |= epnum;
++	}
++
++	/* report (variable) full speed bulk maxpacket */
++	if (USB_ENDPOINT_XFER_BULK == type) {
++		int size = ep->maxpacket;
++
++		/* min() doesn't work on bitfields with gcc-3.5 */
++		if (size > 64)
++			size = 64;
++		desc->wMaxPacketSize = cpu_to_le16(size);
++	}
++	return 1;
++}
++
++static struct usb_ep * __init
++find_ep (struct usb_gadget *gadget, const char *name)
++{
++	struct usb_ep	*ep;
++
++	list_for_each_entry (ep, &gadget->ep_list, ep_list) {
++		if (0 == strcmp (ep->name, name))
++			return ep;
++	}
++	return NULL;
++}
++
++/**
++ * usb_ep_autoconfig - choose an endpoint matching the descriptor
++ * @gadget: The device to which the endpoint must belong.
++ * @desc: Endpoint descriptor, with endpoint direction and transfer mode
++ *	initialized.  For periodic transfers, the maximum packet
++ *	size must also be initialized.  This is modified on success.
++ *
++ * By choosing an endpoint to use with the specified descriptor, this
++ * routine simplifies writing gadget drivers that work with multiple
++ * USB device controllers.  The endpoint would be passed later to
++ * usb_ep_enable(), along with some descriptor.
++ *
++ * That second descriptor won't always be the same as the first one.
++ * For example, isochronous endpoints can be autoconfigured for high
++ * bandwidth, and then used in several lower bandwidth altsettings.
++ * Also, high and full speed descriptors will be different.
++ *
++ * Be sure to examine and test the results of autoconfiguration on your
++ * hardware.  This code may not make the best choices about how to use the
++ * USB controller, and it can't know all the restrictions that may apply.
++ * Some combinations of driver and hardware won't be able to autoconfigure.
++ *
++ * On success, this returns an un-claimed usb_ep, and modifies the endpoint
++ * descriptor bEndpointAddress.  For bulk endpoints, the wMaxPacket value
++ * is initialized as if the endpoint were used at full speed.  To prevent
++ * the endpoint from being returned by a later autoconfig call, claim it
++ * by assigning ep->driver_data to some non-null value.
++ *
++ * On failure, this returns a null endpoint descriptor.
++ */
++struct usb_ep * __init usb_ep_autoconfig (
++	struct usb_gadget		*gadget,
++	struct usb_endpoint_descriptor	*desc
++)
++{
++	struct usb_ep	*ep;
++	u8		type;
++
++	type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
++
++	/* First, apply chip-specific "best usage" knowledge.
++	 * This might make a good usb_gadget_ops hook ...
++	 */
++	if (gadget_is_net2280 (gadget) && type == USB_ENDPOINT_XFER_INT) {
++		/* ep-e, ep-f are PIO with only 64 byte fifos */
++		ep = find_ep (gadget, "ep-e");
++		if (ep && ep_matches (gadget, ep, desc))
++			return ep;
++		ep = find_ep (gadget, "ep-f");
++		if (ep && ep_matches (gadget, ep, desc))
++			return ep;
++
++	} else if (gadget_is_goku (gadget)) {
++		if (USB_ENDPOINT_XFER_INT == type) {
++			/* single buffering is enough */
++			ep = find_ep (gadget, "ep3-bulk");
++			if (ep && ep_matches (gadget, ep, desc))
++				return ep;
++		} else if (USB_ENDPOINT_XFER_BULK == type
++				&& (USB_DIR_IN & desc->bEndpointAddress)) {
++			/* DMA may be available */
++			ep = find_ep (gadget, "ep2-bulk");
++			if (ep && ep_matches (gadget, ep, desc))
++				return ep;
++		}
++
++	} else if (gadget_is_sh (gadget) && USB_ENDPOINT_XFER_INT == type) {
++		/* single buffering is enough; maybe 8 byte fifo is too */
++		ep = find_ep (gadget, "ep3in-bulk");
++		if (ep && ep_matches (gadget, ep, desc))
++			return ep;
++
++	} else if (gadget_is_mq11xx (gadget) && USB_ENDPOINT_XFER_INT == type) {
++		ep = find_ep (gadget, "ep1-bulk");
++		if (ep && ep_matches (gadget, ep, desc))
++			return ep;
++	}
++
++	/* Second, look at endpoints until an unclaimed one looks usable */ 
++	list_for_each_entry (ep, &gadget->ep_list, ep_list) {
++		if (ep_matches (gadget, ep, desc))
++			return ep;
++	}
++
++	/* Fail */
++	return NULL;
++}
++
++/**
++ * usb_ep_autoconfig_reset - reset endpoint autoconfig state
++ * @gadget: device for which autoconfig state will be reset
++ *
++ * Use this for devices where one configuration may need to assign
++ * endpoint resources very differently from the next one.  It clears
++ * state such as ep->driver_data and the record of assigned endpoints
++ * used by usb_ep_autoconfig().
++ */
++void __init usb_ep_autoconfig_reset (struct usb_gadget *gadget)
++{
++	struct usb_ep	*ep;
++
++	list_for_each_entry (ep, &gadget->ep_list, ep_list) {
++		ep->driver_data = NULL;
++	}
++#ifdef	MANY_ENDPOINTS
++	in_epnum = 0;
++#endif
++	epnum = 0;
++}
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/ether.c kernel/drivers/usb/gadget/ether.c
+--- /tmp/kernel/drivers/usb/gadget/ether.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/ether.c	2005-04-22 18:01:31.044861540 +0200
+@@ -0,0 +1,2734 @@
++/*
++ * ether.c -- Ethernet gadget driver, with CDC and non-CDC options
++ *
++ * Copyright (C) 2003-2005 David Brownell
++ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++
++// #define DEBUG 1
++// #define VERBOSE
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/delay.h>
++#include <linux/ioport.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/smp_lock.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++#include <linux/uts.h>
++#include <linux/version.h>
++#include <linux/moduleparam.h>
++#include <linux/ctype.h>
++
++#include <asm/byteorder.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/uaccess.h>
++#include <asm/unaligned.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_cdc.h>
++#include <linux/usb_gadget.h>
++
++#include <linux/random.h>
++#include <linux/netdevice.h>
++#include <linux/etherdevice.h>
++#include <linux/ethtool.h>
++
++#include "gadget_chips.h"
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * Ethernet gadget driver -- with CDC and non-CDC options
++ * Builds on hardware support for a full duplex link.
++ *
++ * CDC Ethernet is the standard USB solution for sending Ethernet frames
++ * using USB.  Real hardware tends to use the same framing protocol but look
++ * different for control features.  This driver strongly prefers to use
++ * this USB-IF standard as its open-systems interoperability solution;
++ * most host side USB stacks (except from Microsoft) support it.
++ *
++ * There's some hardware that can't talk CDC.  We make that hardware
++ * implement a "minimalist" vendor-agnostic CDC core:  same framing, but
++ * link-level setup only requires activating the configuration.
++ * Linux supports it, but other host operating systems may not.
++ * (This is a subset of CDC Ethernet.)
++ *
++ * A third option is also in use.  Rather than CDC Ethernet, or something
++ * simpler, Microsoft pushes their own approach: RNDIS.  The published
++ * RNDIS specs are ambiguous and appear to be incomplete, and are also
++ * needlessly complex.
++ */
++
++#define DRIVER_DESC		"Ethernet Gadget"
++#define DRIVER_VERSION		"Equinox 2004"
++
++static const char shortname [] = "ether";
++static const char driver_desc [] = DRIVER_DESC;
++
++#define RX_EXTRA	20		/* guard against rx overflows */
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++#include "rndis.h"
++#else
++#define rndis_init() 0
++#define rndis_exit() do{}while(0)
++#endif
++
++/* 2.6-compat */
++#ifndef container_of
++#define container_of	list_entry
++#endif
++
++/** PO: really needed? */
++#include <linux/tqueue.h>
++#define	work_struct		tq_struct
++#define	INIT_WORK		INIT_TQUEUE
++#define schedule_work		schedule_task
++#define	flush_scheduled_work	flush_scheduled_tasks
++
++static void random_ether_addr (u8 *addr)
++{
++	get_random_bytes (addr, ETH_ALEN);
++	addr [0] &= 0xfe;	// clear multicast bit
++	addr [0] |= 0x02;	// set local assignment bit (IEEE802)
++}
++
++/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
++#define	DEFAULT_FILTER	(USB_CDC_PACKET_TYPE_BROADCAST \
++ 			|USB_CDC_PACKET_TYPE_DIRECTED)
++
++
++/*-------------------------------------------------------------------------*/
++
++struct eth_dev {
++	spinlock_t		lock;
++	struct usb_gadget	*gadget;
++	struct usb_request	*req;		/* for control responses */
++	struct usb_request	*stat_req;	/* for cdc & rndis status */
++
++	u8			config;
++	struct usb_ep		*in_ep, *out_ep, *status_ep;
++	const struct usb_endpoint_descriptor
++				*in, *out, *status;
++	struct list_head	tx_reqs, rx_reqs;
++
++	struct net_device	*net;
++	struct net_device_stats	stats;
++	atomic_t		tx_qlen;
++
++	struct work_struct	work;
++	unsigned		zlp:1;
++	unsigned		cdc:1;
++	unsigned		rndis:1;
++	unsigned		suspended:1;
++	u16			cdc_filter;
++	unsigned long		todo;
++#define	WORK_RX_MEMORY		0
++	int			rndis_config;
++	u8			host_mac [ETH_ALEN];
++};
++
++/* This version autoconfigures as much as possible at run-time.
++ *
++ * It also ASSUMES a self-powered device, without remote wakeup,
++ * although remote wakeup support would make sense.
++ */
++static const char *EP_IN_NAME;
++static const char *EP_OUT_NAME;
++static const char *EP_STATUS_NAME;
++
++/*-------------------------------------------------------------------------*/
++
++/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
++ * Instead:  allocate your own, using normal USB-IF procedures.
++ */
++
++/* Thanks to NetChip Technologies for donating this product ID.
++ * It's for devices with only CDC Ethernet configurations.
++ */
++#define CDC_VENDOR_NUM	0x0525		/* NetChip */
++#define CDC_PRODUCT_NUM	0xa4a1		/* Linux-USB Ethernet Gadget */
++
++/* For hardware that can't talk CDC, we use the same vendor ID that
++ * ARM Linux has used for ethernet-over-usb, both with sa1100 and
++ * with pxa250.  We're protocol-compatible, if the host-side drivers
++ * use the endpoint descriptors.  bcdDevice (version) is nonzero, so
++ * drivers that need to hard-wire endpoint numbers have a hook.
++ *
++ * The protocol is a minimal subset of CDC Ether, which works on any bulk
++ * hardware that's not deeply broken ... even on hardware that can't talk
++ * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
++ * doesn't handle control-OUT).
++ */
++#define	SIMPLE_VENDOR_NUM	0x049f
++#define	SIMPLE_PRODUCT_NUM	0x505a
++
++/* For hardware that can talk RNDIS and either of the above protocols,
++ * use this ID ... the windows INF files will know it.  Unless it's
++ * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
++ * the non-RNDIS configuration.
++ */
++#define RNDIS_VENDOR_NUM	0x0525	/* NetChip */
++#define RNDIS_PRODUCT_NUM	0xa4a2	/* Ethernet/RNDIS Gadget */
++
++
++/* Some systems will want different product identifers published in the
++ * device descriptor, either numbers or strings or both.  These string
++ * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
++ */
++
++static ushort __initdata idVendor;
++MODULE_PARM(idVendor, "h");
++MODULE_PARM_DESC(idVendor, "USB Vendor ID");
++
++static ushort __initdata idProduct;
++MODULE_PARM(idProduct, "h");
++MODULE_PARM_DESC(idProduct, "USB Product ID");
++
++static ushort __initdata bcdDevice;
++MODULE_PARM(bcdDevice, "h");
++MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
++
++static char *__initdata iManufacturer;
++MODULE_PARM(iManufacturer, "s");
++MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
++
++static char *__initdata iProduct;
++MODULE_PARM(iProduct, "s");
++MODULE_PARM_DESC(iProduct, "USB Product string");
++
++/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
++static char *__initdata dev_addr;
++MODULE_PARM(dev_addr, "s");
++MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
++
++/* this address is invisible to ifconfig */
++static char *__initdata host_addr;
++MODULE_PARM(host_addr, "s");
++MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Include CDC support if we could run on CDC-capable hardware. */
++
++#ifdef CONFIG_USB_GADGET_NET2280
++#define	DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_DUMMY_HCD
++#define	DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_GOKU
++#define	DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_LH7A40X
++#define DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_MQ11XX
++#define	DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_OMAP
++#define	DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_N9604
++#define	DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_PXA27X
++#define DEV_CONFIG_CDC
++#endif
++
++#ifdef CONFIG_USB_GADGET_AT91
++#define DEV_CONFIG_CDC
++#endif
++
++
++/* For CDC-incapable hardware, choose the simple cdc subset.
++ * Anything that talks bulk (without notable bugs) can do this.
++ */
++#ifdef CONFIG_USB_GADGET_PXA2XX
++#define	DEV_CONFIG_SUBSET
++#endif
++
++#ifdef CONFIG_USB_GADGET_SH
++#define	DEV_CONFIG_SUBSET
++#endif
++
++#ifdef CONFIG_USB_GADGET_SA1100
++/* use non-CDC for backwards compatibility */
++#define	DEV_CONFIG_SUBSET
++#endif
++
++#ifdef CONFIG_USB_GADGET_S3C2410
++#define DEV_CONFIG_CDC
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++/* "main" config is either CDC, or its simple subset */
++static inline int is_cdc(struct eth_dev *dev)
++{
++#if	!defined(DEV_CONFIG_SUBSET)
++	return 1;		/* only cdc possible */
++#elif	!defined (DEV_CONFIG_CDC)
++	return 0;		/* only subset possible */
++#else
++	return dev->cdc;	/* depends on what hardware we found */
++#endif
++}
++
++/* "secondary" RNDIS config may sometimes be activated */
++static inline int rndis_active(struct eth_dev *dev)
++{
++#ifdef	CONFIG_USB_ETH_RNDIS
++	return dev->rndis;
++#else
++	return 0;
++#endif
++}
++
++#define	subset_active(dev)	(!is_cdc(dev) && !rndis_active(dev))
++#define	cdc_active(dev)		( is_cdc(dev) && !rndis_active(dev))
++
++
++
++#define DEFAULT_QLEN	2	/* double buffering by default */
++
++/* peak bulk transfer bits-per-second */
++#define	HS_BPS 		(13 * 512 * 8 * 1000 * 8)
++#define	FS_BPS		(19 *  64 * 1 * 1000 * 8)
++
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++
++static unsigned qmult = 5;
++MODULE_PARM(qmult, "i");
++
++
++/* for dual-speed hardware, use deeper queues at highspeed */
++#define qlen(gadget) \
++	(DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
++
++/* also defer IRQs on highspeed TX */
++#define TX_DELAY	qmult
++
++#define	BITRATE(g)	(((g)->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS)
++
++#else	/* full speed (low speed doesn't do bulk) */
++#define qlen(gadget) DEFAULT_QLEN
++
++#define	BITRATE(g)	FS_BPS
++#endif
++
++
++/*-------------------------------------------------------------------------*/
++
++#define xprintk(d,level,fmt,args...) \
++	printk(level "%s: " fmt , (d)->net->name , ## args)
++
++#ifdef DEBUG
++#undef DEBUG
++#define DEBUG(dev,fmt,args...) \
++	xprintk(dev , KERN_DEBUG , fmt , ## args)
++#else
++#define DEBUG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* DEBUG */
++
++#ifdef VERBOSE
++#define VDEBUG	DEBUG
++#else
++#define VDEBUG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* DEBUG */
++
++#define ERROR(dev,fmt,args...) \
++	xprintk(dev , KERN_ERR , fmt , ## args)
++#define WARN(dev,fmt,args...) \
++	xprintk(dev , KERN_WARNING , fmt , ## args)
++#define INFO(dev,fmt,args...) \
++	xprintk(dev , KERN_INFO , fmt , ## args)
++
++/*-------------------------------------------------------------------------*/
++
++/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
++ * ep0 implementation:  descriptors, config management, setup().
++ * also optional class-specific notification interrupt transfer.
++ */
++
++/*
++ * DESCRIPTORS ... most are static, but strings and (full) configuration
++ * descriptors are built on demand.  For now we do either full CDC, or
++ * our simple subset, with RNDIS as an optional second configuration.
++ *
++ * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet.  But
++ * the class descriptors match a modem (they're ignored; it's really just
++ * Ethernet functionality), they don't need the NOP altsetting, and the
++ * status transfer endpoint isn't optional.
++ */
++
++#define STRING_MANUFACTURER		1
++#define STRING_PRODUCT			2
++#define STRING_ETHADDR			3
++#define STRING_DATA			4
++#define STRING_CONTROL			5
++#define STRING_RNDIS_CONTROL		6
++#define STRING_CDC			7
++#define STRING_SUBSET			8
++#define STRING_RNDIS			9
++
++#define USB_BUFSIZ	256		/* holds our biggest descriptor */
++
++/*
++ * This device advertises one configuration, eth_config, unless RNDIS
++ * is enabled (rndis_config) on hardware supporting at least two configs.
++ *
++ * NOTE:  Controllers like superh_udc should probably be able to use
++ * an RNDIS-only configuration.
++ *
++ * FIXME define some higher-powered configurations to make it easier
++ * to recharge batteries ...
++ */
++
++#define DEV_CONFIG_VALUE	1	/* cdc or subset */
++#define DEV_RNDIS_CONFIG_VALUE	2	/* rndis; optional */
++
++static struct usb_device_descriptor
++device_desc = {
++	.bLength =		sizeof device_desc,
++	.bDescriptorType =	USB_DT_DEVICE,
++
++	.bcdUSB =		__constant_cpu_to_le16 (0x0200),
++
++	.bDeviceClass =		USB_CLASS_COMM,
++	.bDeviceSubClass =	0,
++	.bDeviceProtocol =	0,
++
++	.idVendor =		__constant_cpu_to_le16 (CDC_VENDOR_NUM),
++	.idProduct =		__constant_cpu_to_le16 (CDC_PRODUCT_NUM),
++	.iManufacturer =	STRING_MANUFACTURER,
++	.iProduct =		STRING_PRODUCT,
++	.bNumConfigurations =	1,
++};
++
++static struct usb_otg_descriptor
++otg_descriptor = {
++	.bLength =		sizeof otg_descriptor,
++	.bDescriptorType =	USB_DT_OTG,
++
++	.bmAttributes =		USB_OTG_SRP,
++};
++
++static struct usb_config_descriptor
++eth_config = {
++	.bLength =		sizeof eth_config,
++	.bDescriptorType =	USB_DT_CONFIG,
++
++	/* compute wTotalLength on the fly */
++	.bNumInterfaces =	2,
++	.bConfigurationValue =	DEV_CONFIG_VALUE,
++	.iConfiguration =	STRING_CDC,
++	.bmAttributes =		USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
++	.bMaxPower =		50,
++};
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++static struct usb_config_descriptor 
++rndis_config = {
++	.bLength =              sizeof rndis_config,
++	.bDescriptorType =      USB_DT_CONFIG,
++
++	/* compute wTotalLength on the fly */
++	.bNumInterfaces =       2,
++	.bConfigurationValue =  DEV_RNDIS_CONFIG_VALUE,
++	.iConfiguration =       STRING_RNDIS,
++	.bmAttributes =		USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
++	.bMaxPower =            50,
++};
++#endif
++
++/*
++ * Compared to the simple CDC subset, the full CDC Ethernet model adds
++ * three class descriptors, two interface descriptors, optional status
++ * endpoint.  Both have a "data" interface and two bulk endpoints.
++ * There are also differences in how control requests are handled.
++ *
++ * RNDIS shares a lot with CDC-Ethernet, since it's a variant of
++ * the CDC-ACM (modem) spec.
++ */
++
++#ifdef	DEV_CONFIG_CDC
++static struct usb_interface_descriptor
++control_intf = {
++	.bLength =		sizeof control_intf,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bInterfaceNumber =	0,
++	/* status endpoint is optional; this may be patched later */
++	.bNumEndpoints =	1,
++	.bInterfaceClass =	USB_CLASS_COMM,
++	.bInterfaceSubClass =	USB_CDC_SUBCLASS_ETHERNET,
++	.bInterfaceProtocol =	USB_CDC_PROTO_NONE,
++	.iInterface =		STRING_CONTROL,
++};
++#endif
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++static const struct usb_interface_descriptor
++rndis_control_intf = {
++	.bLength =              sizeof rndis_control_intf,
++	.bDescriptorType =      USB_DT_INTERFACE,
++	  
++	.bInterfaceNumber =     0,
++	.bNumEndpoints =        1,
++	.bInterfaceClass =      USB_CLASS_COMM,
++	.bInterfaceSubClass =   USB_CDC_SUBCLASS_ACM,
++	.bInterfaceProtocol =   USB_CDC_ACM_PROTO_VENDOR,
++	.iInterface =           STRING_RNDIS_CONTROL,
++};
++#endif
++
++#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
++
++static const struct usb_cdc_header_desc header_desc = {
++	.bLength =		sizeof header_desc,
++	.bDescriptorType =	USB_DT_CS_INTERFACE,
++	.bDescriptorSubType =	USB_CDC_HEADER_TYPE,
++
++	.bcdCDC =		__constant_cpu_to_le16 (0x0110),
++};
++
++static const struct usb_cdc_union_desc union_desc = {
++	.bLength =		sizeof union_desc,
++	.bDescriptorType =	USB_DT_CS_INTERFACE,
++	.bDescriptorSubType =	USB_CDC_UNION_TYPE,
++
++	.bMasterInterface0 =	0,	/* index of control interface */
++	.bSlaveInterface0 =	1,	/* index of DATA interface */
++};
++
++#endif	/* CDC || RNDIS */
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++
++static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
++	.bLength =  		sizeof call_mgmt_descriptor,
++	.bDescriptorType = 	USB_DT_CS_INTERFACE,
++	.bDescriptorSubType = 	USB_CDC_CALL_MANAGEMENT_TYPE,
++
++	.bmCapabilities = 	0x00,
++	.bDataInterface = 	0x01,
++};
++
++static struct usb_cdc_acm_descriptor acm_descriptor = {
++	.bLength =  		sizeof acm_descriptor,
++	.bDescriptorType = 	USB_DT_CS_INTERFACE,
++	.bDescriptorSubType = 	USB_CDC_ACM_TYPE,
++
++	.bmCapabilities = 	0x00,
++};
++
++#endif
++
++#ifdef	DEV_CONFIG_CDC
++
++static const struct usb_cdc_ether_desc ether_desc = {
++	.bLength =		sizeof ether_desc,
++	.bDescriptorType =	USB_DT_CS_INTERFACE,
++	.bDescriptorSubType =	USB_CDC_ETHERNET_TYPE,
++
++	/* this descriptor actually adds value, surprise! */
++	.iMACAddress =		STRING_ETHADDR,
++	.bmEthernetStatistics =	__constant_cpu_to_le32 (0), /* no statistics */
++	.wMaxSegmentSize =	__constant_cpu_to_le16 (ETH_FRAME_LEN),
++	.wNumberMCFilters =	__constant_cpu_to_le16 (0),
++	.bNumberPowerFilters =	0,
++};
++
++#endif
++
++#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
++
++/* include the status endpoint if we can, even where it's optional.
++ * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
++ * packet, to simplify cancelation; and a big transfer interval, to
++ * waste less bandwidth.
++ *
++ * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
++ * if they ignore the connect/disconnect notifications that real aether
++ * can provide.  more advanced cdc configurations might want to support
++ * encapsulated commands (vendor-specific, using control-OUT).
++ *
++ * RNDIS requires the status endpoint, since it uses that encapsulation
++ * mechanism for its funky RPC scheme.
++ */
++ 
++#define LOG2_STATUS_INTERVAL_MSEC	5	/* 1 << 5 == 32 msec */
++#define STATUS_BYTECOUNT		16	/* 8 byte header + data */
++
++static struct usb_endpoint_descriptor
++fs_status_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_IN,
++	.bmAttributes =		USB_ENDPOINT_XFER_INT,
++	.wMaxPacketSize =	__constant_cpu_to_le16 (STATUS_BYTECOUNT),
++	.bInterval =		1 << LOG2_STATUS_INTERVAL_MSEC,
++};
++#endif
++
++#ifdef	DEV_CONFIG_CDC
++
++/* the default data interface has no endpoints ... */
++
++static const struct usb_interface_descriptor
++data_nop_intf = {
++	.bLength =		sizeof data_nop_intf,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bInterfaceNumber =	1,
++	.bAlternateSetting =	0,
++	.bNumEndpoints =	0,
++	.bInterfaceClass =	USB_CLASS_CDC_DATA,
++	.bInterfaceSubClass =	0,
++	.bInterfaceProtocol =	0,
++};
++
++/* ... but the "real" data interface has two bulk endpoints */
++
++static const struct usb_interface_descriptor
++data_intf = {
++	.bLength =		sizeof data_intf,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bInterfaceNumber =	1,
++	.bAlternateSetting =	1,
++	.bNumEndpoints =	2,
++	.bInterfaceClass =	USB_CLASS_CDC_DATA,
++	.bInterfaceSubClass =	0,
++	.bInterfaceProtocol =	0,
++	.iInterface =		STRING_DATA,
++};
++
++#endif
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++
++/* RNDIS doesn't activate by changing to the "real" altsetting */
++
++static const struct usb_interface_descriptor
++rndis_data_intf = {
++	.bLength =		sizeof rndis_data_intf,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bInterfaceNumber =	1,
++	.bAlternateSetting =	0,
++	.bNumEndpoints =	2,
++	.bInterfaceClass =	USB_CLASS_CDC_DATA,
++	.bInterfaceSubClass =	0,
++	.bInterfaceProtocol =	0,
++	.iInterface =		STRING_DATA,
++};
++
++#endif
++
++#ifdef DEV_CONFIG_SUBSET
++
++/*
++ * "Simple" CDC-subset option is a simple vendor-neutral model that most
++ * full speed controllers can handle:  one interface, two bulk endpoints.
++ */
++
++static const struct usb_interface_descriptor
++subset_data_intf = {
++	.bLength =		sizeof subset_data_intf,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bInterfaceNumber =	0,
++	.bAlternateSetting =	0,
++	.bNumEndpoints =	2,
++	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
++	.bInterfaceSubClass =	0,
++	.bInterfaceProtocol =	0,
++	.iInterface =		STRING_DATA,
++};
++
++#endif	/* SUBSET */
++
++
++static struct usb_endpoint_descriptor
++fs_source_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_IN,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++};
++
++static struct usb_endpoint_descriptor
++fs_sink_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_OUT,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++};
++
++static const struct usb_descriptor_header *fs_eth_function [11] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++#ifdef DEV_CONFIG_CDC
++	/* "cdc" mode descriptors */
++	(struct usb_descriptor_header *) &control_intf,
++	(struct usb_descriptor_header *) &header_desc,
++	(struct usb_descriptor_header *) &union_desc,
++	(struct usb_descriptor_header *) &ether_desc,
++	/* NOTE: status endpoint may need to be removed */
++	(struct usb_descriptor_header *) &fs_status_desc,
++	/* data interface, with altsetting */
++	(struct usb_descriptor_header *) &data_nop_intf,
++	(struct usb_descriptor_header *) &data_intf,
++	(struct usb_descriptor_header *) &fs_source_desc,
++	(struct usb_descriptor_header *) &fs_sink_desc,
++	NULL,
++#endif /* DEV_CONFIG_CDC */
++};
++
++static inline void __init fs_subset_descriptors(void)
++{
++#ifdef DEV_CONFIG_SUBSET
++	fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
++	fs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
++	fs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
++	fs_eth_function[4] = NULL;
++#else
++	fs_eth_function[1] = NULL;
++#endif
++}
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++static const struct usb_descriptor_header *fs_rndis_function [] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++	/* control interface matches ACM, not Ethernet */
++	(struct usb_descriptor_header *) &rndis_control_intf,
++	(struct usb_descriptor_header *) &header_desc,
++	(struct usb_descriptor_header *) &call_mgmt_descriptor,
++	(struct usb_descriptor_header *) &acm_descriptor,
++	(struct usb_descriptor_header *) &union_desc,
++	(struct usb_descriptor_header *) &fs_status_desc,
++	/* data interface has no altsetting */
++	(struct usb_descriptor_header *) &rndis_data_intf,
++	(struct usb_descriptor_header *) &fs_source_desc,
++	(struct usb_descriptor_header *) &fs_sink_desc,
++	NULL,
++};
++#endif
++
++#ifdef	CONFIG_USB_GADGET_DUALSPEED
++
++/*
++ * usb 2.0 devices need to expose both high speed and full speed
++ * descriptors, unless they only run at full speed.
++ */
++
++#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
++static struct usb_endpoint_descriptor
++hs_status_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bmAttributes =		USB_ENDPOINT_XFER_INT,
++	.wMaxPacketSize =	__constant_cpu_to_le16 (STATUS_BYTECOUNT),
++	.bInterval =		LOG2_STATUS_INTERVAL_MSEC + 4,
++};
++#endif /* DEV_CONFIG_CDC */
++
++static struct usb_endpoint_descriptor
++hs_source_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16 (512),
++};
++
++static struct usb_endpoint_descriptor
++hs_sink_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16 (512),
++};
++
++static struct usb_qualifier_descriptor
++dev_qualifier = {
++	.bLength =		sizeof dev_qualifier,
++	.bDescriptorType =	USB_DT_DEVICE_QUALIFIER,
++
++	.bcdUSB =		__constant_cpu_to_le16 (0x0200),
++	.bDeviceClass =		USB_CLASS_COMM,
++
++	.bNumConfigurations =	1,
++};
++
++static const struct usb_descriptor_header *hs_eth_function [11] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++#ifdef DEV_CONFIG_CDC
++	/* "cdc" mode descriptors */
++	(struct usb_descriptor_header *) &control_intf,
++	(struct usb_descriptor_header *) &header_desc,
++	(struct usb_descriptor_header *) &union_desc,
++	(struct usb_descriptor_header *) &ether_desc,
++	/* NOTE: status endpoint may need to be removed */
++	(struct usb_descriptor_header *) &hs_status_desc,
++	/* data interface, with altsetting */
++	(struct usb_descriptor_header *) &data_nop_intf,
++	(struct usb_descriptor_header *) &data_intf,
++	(struct usb_descriptor_header *) &hs_source_desc,
++	(struct usb_descriptor_header *) &hs_sink_desc,
++	NULL,
++#endif /* DEV_CONFIG_CDC */
++};
++
++static inline void __init hs_subset_descriptors(void)
++{
++#ifdef DEV_CONFIG_SUBSET
++	hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
++	hs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
++	hs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
++	hs_eth_function[4] = NULL;
++#else
++	hs_eth_function[1] = NULL;
++#endif
++}
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++static const struct usb_descriptor_header *hs_rndis_function [] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++	/* control interface matches ACM, not Ethernet */
++	(struct usb_descriptor_header *) &rndis_control_intf,
++	(struct usb_descriptor_header *) &header_desc,
++	(struct usb_descriptor_header *) &call_mgmt_descriptor,
++	(struct usb_descriptor_header *) &acm_descriptor,
++	(struct usb_descriptor_header *) &union_desc,
++	(struct usb_descriptor_header *) &hs_status_desc,
++	/* data interface has no altsetting */
++	(struct usb_descriptor_header *) &rndis_data_intf,
++	(struct usb_descriptor_header *) &hs_source_desc,
++	(struct usb_descriptor_header *) &hs_sink_desc,
++	NULL,
++};
++#endif
++
++
++/* maxpacket and other transfer characteristics vary by speed. */
++#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
++
++#else
++
++/* if there's no high speed support, maxpacket doesn't change. */
++#define ep_desc(g,hs,fs) fs
++
++static inline void __init hs_subset_descriptors(void)
++{
++}
++
++#endif	/* !CONFIG_USB_GADGET_DUALSPEED */
++
++/*-------------------------------------------------------------------------*/
++
++/* descriptors that are built on-demand */
++
++static char				manufacturer [50];
++static char				product_desc [40] = DRIVER_DESC;
++
++#ifdef	DEV_CONFIG_CDC
++/* address that the host will use ... usually assigned at random */
++static char				ethaddr [2 * ETH_ALEN + 1];
++#endif
++
++/* static strings, in UTF-8 */
++static struct usb_string		strings [] = {
++	{ STRING_MANUFACTURER,	manufacturer, },
++	{ STRING_PRODUCT,	product_desc, },
++	{ STRING_DATA,		"Ethernet Data", },
++#ifdef	DEV_CONFIG_CDC
++	{ STRING_CDC,		"CDC Ethernet", },
++	{ STRING_ETHADDR,	ethaddr, },
++	{ STRING_CONTROL,	"CDC Communications Control", },
++#endif
++#ifdef	DEV_CONFIG_SUBSET
++	{ STRING_SUBSET,	"CDC Ethernet Subset", },
++#endif
++#ifdef	CONFIG_USB_ETH_RNDIS
++	{ STRING_RNDIS,		"RNDIS", },
++	{ STRING_RNDIS_CONTROL,	"RNDIS Communications Control", },
++#endif
++	{  }		/* end of list */
++};
++
++static struct usb_gadget_strings	stringtab = {
++	.language	= 0x0409,	/* en-us */
++	.strings	= strings,
++};
++
++/*
++ * one config, two interfaces:  control, data.
++ * complications: class descriptors, and an altsetting.
++ */
++static int
++config_buf (enum usb_device_speed speed,
++	u8 *buf, u8 type,
++	unsigned index, int is_otg)
++{
++	int					len;
++	const struct usb_config_descriptor	*config;
++	const struct usb_descriptor_header	**function;
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	int				hs = (speed == USB_SPEED_HIGH);
++
++	if (type == USB_DT_OTHER_SPEED_CONFIG)
++		hs = !hs;
++#define which_fn(t)	(hs ? hs_ ## t ## _function : fs_ ## t ## _function)
++#else
++#define	which_fn(t)	(fs_ ## t ## _function)
++#endif
++
++	if (index >= device_desc.bNumConfigurations)
++		return -EINVAL;
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++	/* list the RNDIS config first, to make Microsoft's drivers
++	 * happy. DOCSIS 1.0 needs this too.
++	 */
++	if (device_desc.bNumConfigurations == 2 && index == 0) {
++		config = &rndis_config;
++		function = which_fn (rndis);
++	} else
++#endif
++	{
++		config = &eth_config;
++		function = which_fn (eth);
++	}
++
++	/* for now, don't advertise srp-only devices */
++	if (!is_otg)
++		function++;
++
++	len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function);
++	if (len < 0)
++		return len;
++	((struct usb_config_descriptor *) buf)->bDescriptorType = type;
++	return len;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void eth_start (struct eth_dev *dev, int gfp_flags);
++static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags);
++
++#ifdef	DEV_CONFIG_CDC
++static inline int ether_alt_ep_setup (struct eth_dev *dev, struct usb_ep *ep)
++{
++	const struct usb_endpoint_descriptor	*d;
++
++	/* With CDC,  the host isn't allowed to use these two data
++	 * endpoints in the default altsetting for the interface.
++	 * so we don't activate them yet.  Reset from SET_INTERFACE.
++	 *
++	 * Strictly speaking RNDIS should work the same: activation is
++	 * a side effect of setting a packet filter.  Deactivation is
++	 * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG.
++	 */
++
++	/* one endpoint writes data back IN to the host */
++	if (strcmp (ep->name, EP_IN_NAME) == 0) {
++		d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc);
++		ep->driver_data = dev;
++		dev->in = d;
++
++	/* one endpoint just reads OUT packets */
++	} else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
++		d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc);
++		ep->driver_data = dev;
++		dev->out = d;
++
++	/* optional status/notification endpoint */
++	} else if (EP_STATUS_NAME &&
++			strcmp (ep->name, EP_STATUS_NAME) == 0) {
++		int			result;
++
++		d = ep_desc (dev->gadget, &hs_status_desc, &fs_status_desc);
++		result = usb_ep_enable (ep, d);
++		if (result < 0)
++			return result;
++
++		ep->driver_data = dev;
++		dev->status = d;
++	}
++	return 0;
++}
++#endif
++
++#if	defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
++static inline int ether_ep_setup (struct eth_dev *dev, struct usb_ep *ep)
++{
++	int					result;
++	const struct usb_endpoint_descriptor	*d;
++
++	/* CDC subset is simpler:  if the device is there,
++	 * it's live with rx and tx endpoints.
++	 *
++	 * Do this as a shortcut for RNDIS too.
++	 */
++
++	/* one endpoint writes data back IN to the host */
++	if (strcmp (ep->name, EP_IN_NAME) == 0) {
++		d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc);
++		result = usb_ep_enable (ep, d);
++		if (result < 0)
++			return result;
++
++		ep->driver_data = dev;
++		dev->in = d;
++
++	/* one endpoint just reads OUT packets */
++	} else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
++		d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc);
++		result = usb_ep_enable (ep, d);
++		if (result < 0)
++			return result;
++
++		ep->driver_data = dev;
++		dev->out = d;
++	}
++
++	return 0;
++}
++#endif
++
++static int
++set_ether_config (struct eth_dev *dev, int gfp_flags)
++{
++	int			result = 0;
++	struct usb_ep		*ep;
++	struct usb_gadget	*gadget = dev->gadget;
++
++	gadget_for_each_ep (ep, gadget) {
++#ifdef	DEV_CONFIG_CDC
++		if (!dev->rndis && dev->cdc) {
++			result = ether_alt_ep_setup (dev, ep);
++			if (result == 0)
++				continue;
++		}
++#endif
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++		if (dev->rndis && strcmp (ep->name, EP_STATUS_NAME) == 0) {
++			const struct usb_endpoint_descriptor	*d;
++			d = ep_desc (gadget, &hs_status_desc, &fs_status_desc);
++			result = usb_ep_enable (ep, d);
++			if (result == 0) {
++				ep->driver_data = dev;
++				dev->status = d;
++				continue;
++			}
++		} else
++#endif
++
++		{
++#if	defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
++			result = ether_ep_setup (dev, ep);
++			if (result == 0)
++				continue;
++#endif
++		}
++
++		/* stop on error */
++		ERROR (dev, "can't enable %s, result %d\n", ep->name, result);
++		break;
++	}
++	if (!result && (!dev->in_ep || !dev->out_ep))
++		result = -ENODEV;
++
++	if (result == 0)
++		result = alloc_requests (dev, qlen (gadget), gfp_flags);
++
++	/* on error, disable any endpoints  */
++	if (result < 0) {
++#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
++		if (dev->status)
++			(void) usb_ep_disable (dev->status_ep);
++#endif
++		dev->status = NULL;
++#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
++		if (dev->rndis || !dev->cdc) {
++			if (dev->in)
++				(void) usb_ep_disable (dev->in_ep);
++			if (dev->out)
++				(void) usb_ep_disable (dev->out_ep);
++		}
++#endif
++		dev->in = NULL;
++		dev->out = NULL;
++	} else
++
++	/* activate non-CDC configs right away
++	 * this isn't strictly according to the RNDIS spec
++	 */
++#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
++	if (dev->rndis || !dev->cdc) {
++		netif_carrier_on (dev->net);
++		if (netif_running (dev->net)) {
++			spin_unlock (&dev->lock);
++			eth_start (dev, GFP_ATOMIC);
++			spin_lock (&dev->lock);
++		}
++	}
++#endif
++
++	if (result == 0)
++		DEBUG (dev, "qlen %d\n", qlen (gadget));
++
++	/* caller is responsible for cleanup on error */
++	return result;
++}
++
++static void eth_reset_config (struct eth_dev *dev)
++{
++	struct usb_request	*req;
++
++	if (dev->config == 0)
++		return;
++
++	DEBUG (dev, "%s\n", __FUNCTION__);
++
++	netif_stop_queue (dev->net);
++	netif_carrier_off (dev->net);
++
++	/* disable endpoints, forcing (synchronous) completion of
++	 * pending i/o.  then free the requests.
++	 */
++	if (dev->in) {
++		usb_ep_disable (dev->in_ep);
++		while (likely (!list_empty (&dev->tx_reqs))) {
++			req = container_of (dev->tx_reqs.next,
++						struct usb_request, list);
++			list_del (&req->list);
++			usb_ep_free_request (dev->in_ep, req);
++		}
++	}
++	if (dev->out) {
++		usb_ep_disable (dev->out_ep);
++		while (likely (!list_empty (&dev->rx_reqs))) {
++			req = container_of (dev->rx_reqs.next,
++						struct usb_request, list);
++			list_del (&req->list);
++			usb_ep_free_request (dev->out_ep, req);
++		}
++	}
++
++	if (dev->status) {
++		usb_ep_disable (dev->status_ep);
++	}
++	dev->config = 0;
++}
++
++/* change our operational config.  must agree with the code
++ * that returns config descriptors, and altsetting code.
++ */
++static int
++eth_set_config (struct eth_dev *dev, unsigned number, int gfp_flags)
++{
++	int			result = 0;
++	struct usb_gadget	*gadget = dev->gadget;
++
++	if (number == dev->config)
++		return 0;
++
++	if (gadget_is_sa1100 (gadget)
++			&& dev->config
++			&& atomic_read (&dev->tx_qlen) != 0) {
++		/* tx fifo is full, but we can't clear it...*/
++		INFO (dev, "can't change configurations\n");
++		return -ESPIPE;
++	}
++	eth_reset_config (dev);
++
++	/* default:  pass all packets, no multicast filtering */
++	dev->cdc_filter = 0x000f;
++
++	switch (number) {
++	case DEV_CONFIG_VALUE:
++		dev->rndis = 0;
++		result = set_ether_config (dev, gfp_flags);
++		break;
++#ifdef	CONFIG_USB_ETH_RNDIS
++	case DEV_RNDIS_CONFIG_VALUE:
++		dev->rndis = 1;
++		result = set_ether_config (dev, gfp_flags);
++		break;
++#endif
++	default:
++		result = -EINVAL;
++		/* FALL THROUGH */
++	case 0:
++		break;
++	}
++
++	if (result) {
++		if (number)
++			eth_reset_config (dev);
++		usb_gadget_vbus_draw(dev->gadget,
++				dev->gadget->is_otg ? 8 : 100);
++	} else {
++		char *speed;
++		unsigned power;
++
++		power = 2 * eth_config.bMaxPower;
++		usb_gadget_vbus_draw(dev->gadget, power);
++
++		switch (gadget->speed) {
++		case USB_SPEED_FULL:	speed = "full"; break;
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++		case USB_SPEED_HIGH:	speed = "high"; break;
++#endif
++		default: 		speed = "?"; break;
++		}
++
++		dev->config = number;
++		INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n",
++				speed, number, power, driver_desc,
++				dev->rndis
++					? "RNDIS"
++					: (dev->cdc
++						? "CDC Ethernet"
++						: "CDC Ethernet Subset"));
++	}
++	return result;
++}
++
++/*-------------------------------------------------------------------------*/
++
++#ifdef	DEV_CONFIG_CDC
++
++static void eth_status_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct usb_cdc_notification	*event = req->buf;
++	int				value = req->status;
++	struct eth_dev			*dev = ep->driver_data;
++
++	/* issue the second notification if host reads the first */
++	if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION
++			&& value == 0) {
++		__le32	*data = req->buf + sizeof *event;
++
++		event->bmRequestType = 0xA1;
++		event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
++		event->wValue = __constant_cpu_to_le16 (0);
++		event->wIndex = __constant_cpu_to_le16 (1);
++		event->wLength = __constant_cpu_to_le16 (8);
++
++		/* SPEED_CHANGE data is up/down speeds in bits/sec */
++		data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget));
++
++		req->length = STATUS_BYTECOUNT;
++		value = usb_ep_queue (ep, req, GFP_ATOMIC);
++		DEBUG (dev, "send SPEED_CHANGE --> %d\n", value);
++		if (value == 0)
++			return;
++	} else if (value != -ECONNRESET)
++		DEBUG (dev, "event %02x --> %d\n",
++			event->bNotificationType, value);
++	event->bmRequestType = 0xff;
++}
++
++static void issue_start_status (struct eth_dev *dev)
++{
++	struct usb_request		*req = dev->stat_req;
++	struct usb_cdc_notification	*event;
++	int				value;
++ 
++	DEBUG (dev, "%s, flush old status first\n", __FUNCTION__);
++
++	/* flush old status
++	 *
++	 * FIXME ugly idiom, maybe we'd be better with just
++	 * a "cancel the whole queue" primitive since any
++	 * unlink-one primitive has way too many error modes.
++	 * here, we "know" toggle is already clear...
++	 */
++	usb_ep_disable (dev->status_ep);
++	usb_ep_enable (dev->status_ep, dev->status);
++
++	/* 3.8.1 says to issue first NETWORK_CONNECTION, then
++	 * a SPEED_CHANGE.  could be useful in some configs.
++	 */
++	event = req->buf;
++	event->bmRequestType = 0xA1;
++	event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
++	event->wValue = __constant_cpu_to_le16 (1);	/* connected */
++	event->wIndex = __constant_cpu_to_le16 (1);
++	event->wLength = 0;
++
++	req->length = sizeof *event;
++	req->complete = eth_status_complete;
++	value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC);
++	if (value < 0)
++		DEBUG (dev, "status buf queue --> %d\n", value);
++}
++
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	if (req->status || req->actual != req->length)
++		DEBUG ((struct eth_dev *) ep->driver_data,
++				"setup complete --> %d, %d/%d\n",
++				req->status, req->actual, req->length);
++}
++
++#ifdef CONFIG_USB_ETH_RNDIS
++
++static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	if (req->status || req->actual != req->length)
++		DEBUG ((struct eth_dev *) ep->driver_data,
++			"rndis response complete --> %d, %d/%d\n",
++			req->status, req->actual, req->length);
++
++	/* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */
++}
++
++static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct eth_dev          *dev = ep->driver_data;
++	int			status;
++	
++	/* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
++	spin_lock(&dev->lock);
++	status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf);
++	if (status < 0)
++		ERROR(dev, "%s: rndis parse error %d\n", __FUNCTION__, status);
++	spin_unlock(&dev->lock);
++}
++
++#endif	/* RNDIS */
++
++/*
++ * The setup() callback implements all the ep0 functionality that's not
++ * handled lower down.  CDC has a number of less-common features:
++ *
++ *  - two interfaces:  control, and ethernet data
++ *  - Ethernet data interface has two altsettings:  default, and active
++ *  - class-specific descriptors for the control interface
++ *  - class-specific control requests
++ */
++static int
++eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
++{
++	struct eth_dev		*dev = get_gadget_data (gadget);
++	struct usb_request	*req = dev->req;
++	int			value = -EOPNOTSUPP;
++	u16			wIndex = ctrl->wIndex;
++	u16			wValue = ctrl->wValue;
++	u16			wLength = ctrl->wLength;
++
++	/* descriptors just go into the pre-allocated ep0 buffer,
++	 * while config change events may enable network traffic.
++	 */
++	req->complete = eth_setup_complete;
++	switch (ctrl->bRequest) {
++
++	case USB_REQ_GET_DESCRIPTOR:
++		if (ctrl->bRequestType != USB_DIR_IN)
++			break;
++		switch (wValue >> 8) {
++
++		case USB_DT_DEVICE:
++			value = min (wLength, (u16) sizeof device_desc);
++			memcpy (req->buf, &device_desc, value);
++			break;
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++		case USB_DT_DEVICE_QUALIFIER:
++			if (!gadget->is_dualspeed)
++				break;
++			value = min (wLength, (u16) sizeof dev_qualifier);
++			memcpy (req->buf, &dev_qualifier, value);
++			break;
++
++		case USB_DT_OTHER_SPEED_CONFIG:
++			if (!gadget->is_dualspeed)
++				break;
++			// FALLTHROUGH
++#endif /* CONFIG_USB_GADGET_DUALSPEED */
++		case USB_DT_CONFIG:
++			value = config_buf (gadget->speed, req->buf,
++					wValue >> 8,
++					wValue & 0xff,
++					gadget->is_otg);
++			if (value >= 0)
++				value = min (wLength, (u16) value);
++			break;
++
++		case USB_DT_STRING:
++			value = usb_gadget_get_string (&stringtab,
++					wValue & 0xff, req->buf);
++			if (value >= 0)
++				value = min (wLength, (u16) value);
++			break;
++		}
++		break;
++
++	case USB_REQ_SET_CONFIGURATION:
++		if (ctrl->bRequestType != 0)
++			break;
++		if (gadget->a_hnp_support)
++			DEBUG (dev, "HNP available\n");
++		else if (gadget->a_alt_hnp_support)
++			DEBUG (dev, "HNP needs a different root port\n");
++		spin_lock (&dev->lock);
++		value = eth_set_config (dev, wValue, GFP_ATOMIC);
++		spin_unlock (&dev->lock);
++		break;
++	case USB_REQ_GET_CONFIGURATION:
++		if (ctrl->bRequestType != USB_DIR_IN)
++			break;
++		*(u8 *)req->buf = dev->config;
++		value = min (wLength, (u16) 1);
++		break;
++
++	case USB_REQ_SET_INTERFACE:
++		if (ctrl->bRequestType != USB_RECIP_INTERFACE
++				|| !dev->config
++				|| wIndex > 1)
++			break;
++		if (!dev->cdc && wIndex != 0)
++			break;
++		spin_lock (&dev->lock);
++
++		/* PXA hardware partially handles SET_INTERFACE;
++		 * we need to kluge around that interference.
++		 */
++		if (gadget_is_pxa (gadget)) {
++			value = eth_set_config (dev, DEV_CONFIG_VALUE,
++						GFP_ATOMIC);
++			goto done_set_intf;
++		}
++
++#ifdef DEV_CONFIG_CDC
++		switch (wIndex) {
++		case 0:		/* control/master intf */
++			if (wValue != 0)
++				break;
++			if (dev->status) {
++				usb_ep_disable (dev->status_ep);
++				usb_ep_enable (dev->status_ep, dev->status);
++			}
++			value = 0;
++			break;
++		case 1:		/* data intf */
++			if (wValue > 1)
++				break;
++			usb_ep_disable (dev->in_ep);
++			usb_ep_disable (dev->out_ep);
++
++			/* CDC requires the data transfers not be done from
++			 * the default interface setting ... also, setting
++			 * the non-default interface clears filters etc.
++			 */
++			if (wValue == 1) {
++				usb_ep_enable (dev->in_ep, dev->in);
++				usb_ep_enable (dev->out_ep, dev->out);
++				dev->cdc_filter = DEFAULT_FILTER;
++				netif_carrier_on (dev->net);
++				if (dev->status)
++					issue_start_status (dev);
++				if (netif_running (dev->net)) {
++					spin_unlock (&dev->lock);
++					eth_start (dev, GFP_ATOMIC);
++					spin_lock (&dev->lock);
++				}
++			} else {
++				netif_stop_queue (dev->net);
++				netif_carrier_off (dev->net);
++			}
++			value = 0;
++			break;
++		}
++#else
++		/* FIXME this is wrong, as is the assumption that
++		 * all non-PXA hardware talks real CDC ...
++		 */
++		WARN(dev, "set_interface ignored!\n");
++#endif /* DEV_CONFIG_CDC */
++
++done_set_intf:
++		spin_unlock (&dev->lock);
++		break;
++	case USB_REQ_GET_INTERFACE:
++		if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
++				|| !dev->config
++				|| wIndex > 1)
++			break;
++		if (!(dev->cdc || dev->rndis) && wIndex != 0)
++			break;
++
++		/* for CDC, iff carrier is on, data interface is active. */
++		if (dev->rndis || wIndex != 1)
++			*(u8 *)req->buf = 0;
++		else
++			*(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0;
++		value = min (wLength, (u16) 1);
++		break;
++
++#ifdef DEV_CONFIG_CDC
++	case USB_CDC_SET_ETHERNET_PACKET_FILTER:
++		/* see 6.2.30: no data, wIndex = interface,
++		 * wValue = packet filter bitmap
++		 */
++		if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
++				|| !dev->cdc
++				|| dev->rndis
++				|| wLength != 0
++				|| wIndex > 1)
++			break;
++		DEBUG (dev, "packet filter %02x\n", wValue);
++		dev->cdc_filter = wValue;
++		value = 0;
++		break;
++
++	/* and potentially:
++	 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
++	 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
++	 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
++	 * case USB_CDC_GET_ETHERNET_STATISTIC:
++	 */
++
++#endif /* DEV_CONFIG_CDC */
++
++#ifdef CONFIG_USB_ETH_RNDIS		
++	/* RNDIS uses the CDC command encapsulation mechanism to implement
++	 * an RPC scheme, with much getting/setting of attributes by OID.
++	 */
++	case USB_CDC_SEND_ENCAPSULATED_COMMAND:
++		if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
++				|| !dev->rndis
++				|| wLength > USB_BUFSIZ
++				|| wValue
++				|| rndis_control_intf.bInterfaceNumber
++					!= wIndex)
++			break;
++		/* read the request, then process it */
++		value = wLength;
++		req->complete = rndis_command_complete;
++		/* later, rndis_control_ack () sends a notification */
++		break;
++		
++	case USB_CDC_GET_ENCAPSULATED_RESPONSE:
++		if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE)
++					== ctrl->bRequestType
++				&& dev->rndis
++				// && wLength >= 0x0400
++				&& !wValue
++				&& rndis_control_intf.bInterfaceNumber
++					== wIndex) {
++			u8 *buf;
++
++			/* return the result */
++			buf = rndis_get_next_response (dev->rndis_config,
++						       &value);
++			if (buf) {
++				memcpy (req->buf, buf, value);
++				req->complete = rndis_response_complete;
++				rndis_free_response(dev->rndis_config, buf);
++			}
++			/* else stalls ... spec says to avoid that */
++		}
++		break;
++#endif	/* RNDIS */
++
++	default:
++		VDEBUG (dev,
++			"unknown control req%02x.%02x v%04x i%04x l%d\n",
++			ctrl->bRequestType, ctrl->bRequest,
++			wValue, wIndex, wLength);
++	}
++
++	/* respond with data transfer before status phase? */
++	if (value >= 0) {
++		req->length = value;
++		req->zero = value < wLength
++				&& (value % gadget->ep0->maxpacket) == 0;
++		value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
++		if (value < 0) {
++			DEBUG (dev, "ep_queue --> %d\n", value);
++			req->status = 0;
++			eth_setup_complete (gadget->ep0, req);
++		}
++	}
++
++	/* host either stalls (value < 0) or reports success */
++	return value;
++}
++
++static void
++eth_disconnect (struct usb_gadget *gadget)
++{
++	struct eth_dev		*dev = get_gadget_data (gadget);
++	unsigned long		flags;
++
++	spin_lock_irqsave (&dev->lock, flags);
++	netif_stop_queue (dev->net);
++	netif_carrier_off (dev->net);
++	eth_reset_config (dev);
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	/* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
++
++	/* next we may get setup() calls to enumerate new connections;
++	 * or an unbind() during shutdown (including removing module).
++	 */
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
++
++/* glue code: in more recent 2.4 kernels these functions are contained in netdev.h */
++
++#ifndef HAVE_NETDEV_PRIV
++static inline void *netdev_priv(struct net_device *net)
++{
++   return net->priv;
++}
++#endif
++
++#ifndef HAVE_FREE_NETDEV
++static inline void free_netdev(struct net_device *dev)
++{
++	kfree(dev);
++}
++#endif
++
++static int eth_change_mtu (struct net_device *net, int new_mtu)
++{
++	struct eth_dev	*dev = netdev_priv(net);
++
++	// FIXME if rndis, don't change while link's live
++
++	if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
++		return -ERANGE;
++	/* no zero-length packet read wanted after mtu-sized packets */
++	if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0)
++		return -EDOM;
++	net->mtu = new_mtu;
++	return 0;
++}
++
++static struct net_device_stats *eth_get_stats (struct net_device *net)
++{
++	return &((struct eth_dev *)netdev_priv(net))->stats;
++}
++
++static int eth_ethtool_ioctl (struct net_device *net, void *useraddr)
++{
++	struct eth_dev	*dev = (struct eth_dev *) net->priv;
++	u32		cmd;
++
++	if (get_user (cmd, (u32 *)useraddr))
++		return -EFAULT;
++	switch (cmd) {
++
++	case ETHTOOL_GDRVINFO: {	/* get driver info */
++		struct ethtool_drvinfo		info;
++
++		memset (&info, 0, sizeof info);
++		info.cmd = ETHTOOL_GDRVINFO;
++		strncpy (info.driver, shortname, sizeof info.driver);
++		strncpy (info.version, DRIVER_VERSION, sizeof info.version);
++		strncpy (info.fw_version, dev->gadget->name, sizeof info.fw_version);
++		strncpy (info.bus_info, dev->gadget->dev.bus_id,
++			sizeof info.bus_info);
++		if (copy_to_user (useraddr, &info, sizeof (info)))
++			return -EFAULT;
++		return 0;
++		}
++
++	case ETHTOOL_GLINK: {		/* get link status */
++		struct ethtool_value	edata = { ETHTOOL_GLINK };
++
++		edata.data = (dev->gadget->speed != USB_SPEED_UNKNOWN);
++		if (copy_to_user (useraddr, &edata, sizeof (edata)))
++			return -EFAULT;
++		return 0;
++		}
++
++	}
++	/* Note that the ethtool user space code requires EOPNOTSUPP */
++	return -EOPNOTSUPP;
++}
++
++static int eth_ioctl (struct net_device *net, struct ifreq *rq, int cmd)
++{
++	switch (cmd) {
++	case SIOCETHTOOL:
++		return eth_ethtool_ioctl (net, (void *)rq->ifr_data);
++	default:
++		return -EOPNOTSUPP;
++	}
++}
++
++static void defer_kevent (struct eth_dev *dev, int flag)
++{
++	if (test_and_set_bit (flag, &dev->todo))
++		return;
++	if (!schedule_work (&dev->work))
++		ERROR (dev, "kevent %d may have been dropped\n", flag);
++	else
++		DEBUG (dev, "kevent %d scheduled\n", flag);
++}
++
++static void rx_complete (struct usb_ep *ep, struct usb_request *req);
++
++#ifndef	NET_IP_ALIGN
++/* this can be a cpu-specific value */
++#define	NET_IP_ALIGN	2
++#endif
++
++static int
++rx_submit (struct eth_dev *dev, struct usb_request *req, int gfp_flags)
++{
++	struct sk_buff		*skb;
++	int			retval = -ENOMEM;
++	size_t			size;
++
++	/* Padding up to RX_EXTRA handles minor disagreements with host.
++	 * Normally we use the USB "terminate on short read" convention;
++	 * so allow up to (N*maxpacket), since that memory is normally
++	 * already allocated.  Some hardware doesn't deal well with short
++	 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
++	 * byte off the end (to force hardware errors on overflow).
++	 *
++	 * RNDIS uses internal framing, and explicitly allows senders to
++	 * pad to end-of-packet.  That's potentially nice for speed,
++	 * but means receivers can't recover synch on their own.
++	 */
++	size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA);
++	size += dev->out_ep->maxpacket - 1;
++#ifdef CONFIG_USB_ETH_RNDIS
++	if (dev->rndis)
++		size += sizeof (struct rndis_packet_msg_type);
++#endif	
++	size -= size % dev->out_ep->maxpacket;
++
++	if ((skb = alloc_skb (size + NET_IP_ALIGN, gfp_flags)) == 0) {
++		DEBUG (dev, "no rx skb\n");
++		goto enomem;
++	}
++	
++	/* Some platforms perform better when IP packets are aligned,
++	 * but on at least one, checksumming fails otherwise.  Note:
++	 * this doesn't account for variable-sized RNDIS headers.
++	 */
++	skb_reserve(skb, NET_IP_ALIGN);
++
++	req->buf = skb->data;
++	req->length = size;
++	req->complete = rx_complete;
++	req->context = skb;
++
++	retval = usb_ep_queue (dev->out_ep, req, gfp_flags);
++	if (retval == -ENOMEM)
++enomem:
++		defer_kevent (dev, WORK_RX_MEMORY);
++	if (retval) {
++		DEBUG (dev, "rx submit --> %d\n", retval);
++		dev_kfree_skb_any (skb);
++		spin_lock (&dev->lock);
++		list_add (&req->list, &dev->rx_reqs);
++		spin_unlock (&dev->lock);
++	}
++	return retval;
++}
++
++static void rx_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct sk_buff	*skb = req->context;
++	struct eth_dev	*dev = ep->driver_data;
++	int		status = req->status;
++
++	switch (status) {
++
++	/* normal completion */
++	case 0:
++		skb_put (skb, req->actual);
++#ifdef CONFIG_USB_ETH_RNDIS
++		/* we know MaxPacketsPerTransfer == 1 here */
++		if (dev->rndis)
++			rndis_rm_hdr (req->buf, &(skb->len));
++#endif
++		if (ETH_HLEN > skb->len || skb->len > ETH_FRAME_LEN) {
++			dev->stats.rx_errors++;
++			dev->stats.rx_length_errors++;
++			DEBUG (dev, "rx length %d\n", skb->len);
++			break;
++		}
++
++		skb->dev = dev->net;
++		skb->protocol = eth_type_trans (skb, dev->net);
++		dev->stats.rx_packets++;
++		dev->stats.rx_bytes += skb->len;
++
++		/* no buffer copies needed, unless hardware can't
++		 * use skb buffers.
++		 */
++		status = netif_rx (skb);
++		skb = NULL;
++		break;
++
++	/* software-driven interface shutdown */
++	case -ECONNRESET:		// unlink
++	case -ESHUTDOWN:		// disconnect etc
++		VDEBUG (dev, "rx shutdown, code %d\n", status);
++		goto quiesce;
++
++	/* for hardware automagic (such as pxa) */
++	case -ECONNABORTED:		// endpoint reset
++		DEBUG (dev, "rx %s reset\n", ep->name);
++		defer_kevent (dev, WORK_RX_MEMORY);
++quiesce:
++		dev_kfree_skb_any (skb);
++		goto clean;
++
++	/* data overrun */
++	case -EOVERFLOW:
++		dev->stats.rx_over_errors++;
++		// FALLTHROUGH
++	    
++	default:
++		dev->stats.rx_errors++;
++		DEBUG (dev, "rx status %d\n", status);
++		break;
++	}
++
++	if (skb)
++		dev_kfree_skb_any (skb);
++	if (!netif_running (dev->net)) {
++clean:
++		/* nobody reading rx_reqs, so no dev->lock */
++		list_add (&req->list, &dev->rx_reqs);
++		req = NULL;
++	}
++	if (req)
++		rx_submit (dev, req, GFP_ATOMIC);
++}
++
++static int prealloc (struct list_head *list, struct usb_ep *ep,
++			unsigned n, int gfp_flags)
++{
++	unsigned		i;
++	struct usb_request	*req;
++
++	if (!n)
++		return -ENOMEM;
++
++	/* queue/recycle up to N requests */
++	i = n;
++	list_for_each_entry (req, list, list) {
++		if (i-- == 0)
++			goto extra;
++	}
++	while (i--) {
++		req = usb_ep_alloc_request (ep, gfp_flags);
++		if (!req)
++			return list_empty (list) ? -ENOMEM : 0;
++		list_add (&req->list, list);
++	}
++	return 0;
++
++extra:
++	/* free extras */
++	for (;;) {
++		struct list_head	*next;
++
++		next = req->list.next;
++		list_del (&req->list);
++		usb_ep_free_request (ep, req);
++
++		if (next == list)
++			break;
++
++		req = container_of (next, struct usb_request, list);
++	}
++	return 0;
++}
++
++static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags)
++{
++	int status;
++
++	status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags);
++	if (status < 0)
++		goto fail;
++	status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags);
++	if (status < 0)
++		goto fail;
++	return 0;
++fail:
++	DEBUG (dev, "can't alloc requests\n");
++	return status;
++}
++
++static void rx_fill (struct eth_dev *dev, int gfp_flags)
++{
++	struct usb_request	*req;
++	unsigned long		flags;
++
++	clear_bit (WORK_RX_MEMORY, &dev->todo);
++
++	/* fill unused rxq slots with some skb */
++	spin_lock_irqsave (&dev->lock, flags);
++	while (!list_empty (&dev->rx_reqs)) {
++		req = container_of (dev->rx_reqs.next,
++				struct usb_request, list);
++		list_del_init (&req->list);
++		spin_unlock_irqrestore (&dev->lock, flags);
++
++		if (rx_submit (dev, req, gfp_flags) < 0) {
++			defer_kevent (dev, WORK_RX_MEMORY);
++			return;
++		}
++
++		spin_lock_irqsave (&dev->lock, flags);
++	}
++	spin_unlock_irqrestore (&dev->lock, flags);
++}
++
++static void eth_work (void *_dev)
++{
++	struct eth_dev		*dev = _dev;
++
++	if (test_bit (WORK_RX_MEMORY, &dev->todo)) {
++		if (netif_running (dev->net))
++			rx_fill (dev, GFP_KERNEL);
++		else
++			clear_bit (WORK_RX_MEMORY, &dev->todo);
++	}
++
++	if (dev->todo)
++		DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo);
++}
++
++static void tx_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct sk_buff	*skb = req->context;
++	struct eth_dev	*dev = ep->driver_data;
++
++	switch (req->status) {
++	default:
++		dev->stats.tx_errors++;
++		VDEBUG (dev, "tx err %d\n", req->status);
++		/* FALLTHROUGH */
++	case -ECONNRESET:		// unlink
++	case -ESHUTDOWN:		// disconnect etc
++		break;
++	case 0:
++		dev->stats.tx_bytes += skb->len;
++	}
++	dev->stats.tx_packets++;
++
++	spin_lock (&dev->lock);
++	list_add (&req->list, &dev->tx_reqs);
++	spin_unlock (&dev->lock);
++	dev_kfree_skb_any (skb);
++
++	atomic_dec (&dev->tx_qlen);
++	if (netif_carrier_ok (dev->net))
++		netif_wake_queue (dev->net);
++}
++
++static inline int eth_is_promisc (struct eth_dev *dev)
++{
++	/* no filters for the CDC subset; always promisc */
++	if (subset_active (dev))
++		return 1;
++	return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
++}
++
++static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
++{
++	struct eth_dev		*dev = netdev_priv(net);
++	int			length = skb->len;
++	int			retval;
++	struct usb_request	*req = NULL;
++	unsigned long		flags;
++
++	/* apply outgoing CDC or RNDIS filters */
++	if (!eth_is_promisc (dev)) {
++		u8		*dest = skb->data;
++
++		if (dest [0] & 0x01) {
++			u16	type;
++
++			/* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
++			 * SET_ETHERNET_MULTICAST_FILTERS requests
++			 */
++			if (memcmp (dest, net->broadcast, ETH_ALEN) == 0)
++				type = USB_CDC_PACKET_TYPE_BROADCAST;
++			else
++				type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
++			if (!(dev->cdc_filter & type)) {
++				dev_kfree_skb_any (skb);
++				return 0;
++			}
++		}
++		/* ignores USB_CDC_PACKET_TYPE_DIRECTED */
++	}
++
++	spin_lock_irqsave (&dev->lock, flags);
++	req = container_of (dev->tx_reqs.next, struct usb_request, list);
++	list_del (&req->list);
++	if (list_empty (&dev->tx_reqs))
++		netif_stop_queue (net);
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	/* no buffer copies needed, unless the network stack did it
++	 * or the hardware can't use skb buffers.
++	 * or there's not enough space for any RNDIS headers we need
++	 */
++#ifdef CONFIG_USB_ETH_RNDIS
++	if (dev->rndis) {
++		struct sk_buff	*skb_rndis;
++
++		skb_rndis = skb_realloc_headroom (skb,
++				sizeof (struct rndis_packet_msg_type));
++		if (!skb_rndis)
++			goto drop;
++	
++		dev_kfree_skb_any (skb);
++		skb = skb_rndis;
++		rndis_add_hdr (skb);
++		length = skb->len;
++	}
++#endif
++	req->buf = skb->data;
++	req->context = skb;
++	req->complete = tx_complete;
++
++	/* use zlp framing on tx for strict CDC-Ether conformance,
++	 * though any robust network rx path ignores extra padding.
++	 * and some hardware doesn't like to write zlps.
++	 */
++	req->zero = 1;
++	if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
++		length++;
++
++	req->length = length;
++
++#ifdef	CONFIG_USB_GADGET_DUALSPEED
++	/* throttle highspeed IRQ rate back slightly */
++	req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
++		? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0)
++		: 0;
++#endif
++
++	retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
++	switch (retval) {
++	default:
++		DEBUG (dev, "tx queue err %d\n", retval);
++		break;
++	case 0:
++		net->trans_start = jiffies;
++		atomic_inc (&dev->tx_qlen);
++	}
++
++	if (retval) {
++#ifdef CONFIG_USB_ETH_RNDIS
++drop:
++#endif
++		dev->stats.tx_dropped++;
++		dev_kfree_skb_any (skb);
++		spin_lock_irqsave (&dev->lock, flags);
++		if (list_empty (&dev->tx_reqs))
++			netif_start_queue (net);
++		list_add (&req->list, &dev->tx_reqs);
++		spin_unlock_irqrestore (&dev->lock, flags);
++	}
++	return 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++#ifdef CONFIG_USB_ETH_RNDIS
++
++static void rndis_send_media_state (struct eth_dev *dev, int connect)
++{
++	if (!dev)
++		return;
++	
++	if (connect) {
++		if (rndis_signal_connect (dev->rndis_config))
++			return;
++	} else {
++		if (rndis_signal_disconnect (dev->rndis_config))
++			return;
++	}
++}
++
++static void
++rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	if (req->status || req->actual != req->length)
++		DEBUG ((struct eth_dev *) ep->driver_data,
++			"rndis control ack complete --> %d, %d/%d\n",
++			req->status, req->actual, req->length);
++
++	usb_ep_free_buffer(ep, req->buf, req->dma, 8);
++	usb_ep_free_request(ep, req);
++}
++
++static int rndis_control_ack (struct net_device *net)
++{
++	struct eth_dev          *dev = netdev_priv(net);
++	u32                     length;
++	struct usb_request      *resp;
++	
++	/* in case RNDIS calls this after disconnect */
++	if (!dev->status_ep) {
++		DEBUG (dev, "status ENODEV\n");
++		return -ENODEV;
++	}
++
++	/* Allocate memory for notification ie. ACK */
++	resp = usb_ep_alloc_request (dev->status_ep, GFP_ATOMIC);
++	if (!resp) {
++		DEBUG (dev, "status ENOMEM\n");
++		return -ENOMEM;
++	}
++	
++	resp->buf = usb_ep_alloc_buffer (dev->status_ep, 8,
++					 &resp->dma, GFP_ATOMIC);
++	if (!resp->buf) {
++		DEBUG (dev, "status buf ENOMEM\n");
++		usb_ep_free_request (dev->status_ep, resp);
++		return -ENOMEM;
++	}
++	
++	/* Send RNDIS RESPONSE_AVAILABLE notification;
++	 * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
++	 */
++	resp->length = 8;
++	resp->complete = rndis_control_ack_complete;
++	
++	*((__le32 *) resp->buf) = __constant_cpu_to_le32 (1);
++	*((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0);
++	
++	length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC);
++	if (length < 0) {
++		resp->status = 0;
++		rndis_control_ack_complete (dev->status_ep, resp);
++	}
++	
++	return 0;
++}
++
++#endif	/* RNDIS */
++
++static void eth_start (struct eth_dev *dev, int gfp_flags)
++{
++	DEBUG (dev, "%s\n", __FUNCTION__);
++
++	/* fill the rx queue */
++	rx_fill (dev, gfp_flags);
++
++	/* and open the tx floodgates */ 
++	atomic_set (&dev->tx_qlen, 0);
++	netif_wake_queue (dev->net);
++#ifdef CONFIG_USB_ETH_RNDIS
++	if (dev->rndis) {
++		rndis_set_param_medium (dev->rndis_config,
++					NDIS_MEDIUM_802_3,
++					BITRATE(dev->gadget));
++		rndis_send_media_state (dev, 1);
++	}
++#endif	
++}
++
++static int eth_open (struct net_device *net)
++{
++	struct eth_dev		*dev = netdev_priv(net);
++
++	DEBUG (dev, "%s\n", __FUNCTION__);
++	if (netif_carrier_ok (dev->net))
++		eth_start (dev, GFP_KERNEL);
++	return 0;
++}
++
++static int eth_stop (struct net_device *net)
++{
++	struct eth_dev		*dev = netdev_priv(net);
++
++	VDEBUG (dev, "%s\n", __FUNCTION__);
++	netif_stop_queue (net);
++
++	DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
++		dev->stats.rx_packets, dev->stats.tx_packets, 
++		dev->stats.rx_errors, dev->stats.tx_errors
++		);
++
++	/* ensure there are no more active requests */
++	if (dev->config) {
++		usb_ep_disable (dev->in_ep);
++		usb_ep_disable (dev->out_ep);
++		if (netif_carrier_ok (dev->net)) {
++			DEBUG (dev, "host still using in/out endpoints\n");
++			// FIXME idiom may leave toggle wrong here
++			usb_ep_enable (dev->in_ep, dev->in);
++			usb_ep_enable (dev->out_ep, dev->out);
++		}
++		if (dev->status_ep) {
++			usb_ep_disable (dev->status_ep);
++			usb_ep_enable (dev->status_ep, dev->status);
++		}
++	}
++	
++#ifdef	CONFIG_USB_ETH_RNDIS
++	if (dev->rndis) {
++		rndis_set_param_medium (dev->rndis_config,
++					NDIS_MEDIUM_802_3, 0);
++		rndis_send_media_state (dev, 0);
++	}
++#endif
++
++	return 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_request *eth_req_alloc (struct usb_ep *ep, unsigned size)
++{
++	struct usb_request	*req;
++
++	req = usb_ep_alloc_request (ep, GFP_KERNEL);
++	if (!req)
++		return NULL;
++
++	req->buf = kmalloc (size, GFP_KERNEL);
++	if (!req->buf) {
++		usb_ep_free_request (ep, req);
++		req = NULL;
++	}
++	return req;
++}
++
++static void
++eth_req_free (struct usb_ep *ep, struct usb_request *req)
++{
++	kfree (req->buf);
++	usb_ep_free_request (ep, req);
++}
++
++
++static void
++eth_unbind (struct usb_gadget *gadget)
++{
++	struct eth_dev		*dev = get_gadget_data (gadget);
++
++	DEBUG (dev, "unbind\n");
++#ifdef CONFIG_USB_ETH_RNDIS
++	rndis_deregister (dev->rndis_config);
++	rndis_exit ();
++#endif
++
++	/* we've already been disconnected ... no i/o is active */
++	if (dev->req) {
++		eth_req_free (gadget->ep0, dev->req);
++		dev->req = NULL;
++	}
++	if (dev->stat_req) {
++		eth_req_free (dev->status_ep, dev->stat_req);
++		dev->stat_req = NULL;
++	}
++
++	unregister_netdev (dev->net);
++	free_netdev(dev->net);
++
++	/* assuming we used keventd, it must quiesce too */
++	flush_scheduled_work ();
++	set_gadget_data (gadget, NULL);
++}
++
++static u8 __init nibble (unsigned char c)
++{
++	if (likely (isdigit (c)))
++		return c - '0';
++	c = toupper (c);
++	if (likely (isxdigit (c)))
++		return 10 + c - 'A';
++	return 0;
++}
++
++static void __init get_ether_addr (const char *str, u8 *dev_addr)
++{
++	if (str) {
++		unsigned	i;
++
++		for (i = 0; i < 6; i++) {
++			unsigned char num;
++
++			if((*str == '.') || (*str == ':'))
++				str++;
++			num = nibble(*str++) << 4;
++			num |= (nibble(*str++));
++			dev_addr [i] = num;
++		}
++		if (is_valid_ether_addr (dev_addr))
++			return;
++	}
++	random_ether_addr(dev_addr);
++}
++
++static int __init
++eth_bind (struct usb_gadget *gadget)
++{
++	struct eth_dev		*dev;
++	struct net_device	*net;
++	u8			cdc = 1, zlp = 1, rndis = 1;
++	struct usb_ep		*in_ep, *out_ep, *status_ep = NULL;
++	int			status = -ENOMEM;
++
++	/* these flags are only ever cleared; compiler take note */
++#ifndef	DEV_CONFIG_CDC
++	cdc = 0;
++#endif
++#ifndef	CONFIG_USB_ETH_RNDIS
++	rndis = 0;
++#endif
++
++	/* Because most host side USB stacks handle CDC Ethernet, that
++	 * standard protocol is _strongly_ preferred for interop purposes.
++	 * (By everyone except Microsoft.)
++	 */
++	if (gadget_is_net2280 (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201);
++	} else if (gadget_is_dummy (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0202);
++	} else if (gadget_is_pxa (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203);
++		/* pxa doesn't support altsettings */
++		cdc = 0;
++	} else if (gadget_is_sh(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204);
++		/* sh doesn't support multiple interfaces or configs */
++		cdc = 0;
++		rndis = 0;
++	} else if (gadget_is_sa1100 (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205);
++		/* hardware can't write zlps */
++		zlp = 0;
++		/* sa1100 CAN do CDC, without status endpoint ... we use
++		 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth".
++		 */
++		cdc = 0;
++	} else if (gadget_is_goku (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206);
++	} else if (gadget_is_mq11xx (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207);
++	} else if (gadget_is_omap (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208);
++	} else if (gadget_is_lh7a40x(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0209);
++	} else if (gadget_is_n9604(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
++	} else if (gadget_is_pxa27x(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
++	} else if (gadget_is_s3c2410(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
++	} else if (gadget_is_at91(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
++	} else {
++		/* can't assume CDC works.  don't want to default to
++		 * anything less functional on CDC-capable hardware,
++		 * so we fail in this case.
++		 */
++		printk (KERN_ERR "%s: "
++			"controller '%s' not recognized\n",
++			shortname, gadget->name);
++		return -ENODEV;
++	}
++	snprintf (manufacturer, sizeof manufacturer,
++		UTS_SYSNAME " " UTS_RELEASE "/%s",
++		gadget->name);
++
++	/* If there's an RNDIS configuration, that's what Windows wants to
++	 * be using ... so use these product IDs here and in the "linux.inf"
++	 * needed to install MSFT drivers.  Current Linux kernels will use
++	 * the second configuration if it's CDC Ethernet, and need some help
++	 * to choose the right configuration otherwise.
++	 */
++	if (rndis) {
++		device_desc.idVendor =
++			__constant_cpu_to_le16(RNDIS_VENDOR_NUM);
++		device_desc.idProduct =
++			__constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
++		snprintf (product_desc, sizeof product_desc,
++			"RNDIS/%s", driver_desc);
++
++	/* CDC subset ... recognized by Linux since 2.4.10, but Windows
++	 * drivers aren't widely available.
++	 */
++	} else if (!cdc) {
++		device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
++		device_desc.idVendor =
++			__constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
++		device_desc.idProduct =
++			__constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
++	}
++
++	/* support optional vendor/distro customization */
++	if (idVendor) {
++		if (!idProduct) {
++			printk (KERN_ERR "%s: idVendor needs idProduct!\n",
++				shortname);
++			return -ENODEV;
++		}
++		device_desc.idVendor = cpu_to_le16(idVendor);
++		device_desc.idProduct = cpu_to_le16(idProduct);
++		if (bcdDevice)
++			device_desc.bcdDevice = cpu_to_le16(bcdDevice);
++	}
++	if (iManufacturer)
++		strncpy (manufacturer, iManufacturer, sizeof manufacturer);
++	if (iProduct)
++		strncpy (product_desc, iProduct, sizeof product_desc);
++
++	/* all we really need is bulk IN/OUT */
++	usb_ep_autoconfig_reset (gadget);
++	in_ep = usb_ep_autoconfig (gadget, &fs_source_desc);
++	if (!in_ep) {
++autoconf_fail:
++		printk (KERN_ERR "%s: can't autoconfigure on %s\n",
++			shortname, gadget->name);
++		return -ENODEV;
++	}
++	EP_IN_NAME = in_ep->name;
++	in_ep->driver_data = in_ep;	/* claim */
++	
++	out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
++	if (!out_ep)
++		goto autoconf_fail;
++	EP_OUT_NAME = out_ep->name;
++	out_ep->driver_data = out_ep;	/* claim */
++
++#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
++	/* CDC Ethernet control interface doesn't require a status endpoint.
++	 * Since some hosts expect one, try to allocate one anyway.
++	 */
++	if (cdc || rndis) {
++		status_ep = usb_ep_autoconfig (gadget, &fs_status_desc);
++		if (status_ep) {
++			EP_STATUS_NAME = status_ep->name;
++			status_ep->driver_data = status_ep;	/* claim */
++		} else if (rndis) {
++			printk (KERN_ERR "%s: "
++				"can't run RNDIS on %s\n",
++				shortname, gadget->name);
++			return -ENODEV;
++#ifdef DEV_CONFIG_CDC
++		/* pxa25x only does CDC subset; often used with RNDIS */
++		} else if (cdc) {
++			control_intf.bNumEndpoints = 0;
++			/* FIXME remove endpoint from descriptor list */
++#endif
++		}
++	}
++#endif
++
++	/* one config:  cdc, else minimal subset */
++	if (!cdc) {
++		eth_config.bNumInterfaces = 1;
++		eth_config.iConfiguration = STRING_SUBSET;
++		fs_subset_descriptors();
++		hs_subset_descriptors();
++	}
++
++	/* For now RNDIS is always a second config */
++	if (rndis)
++		device_desc.bNumConfigurations = 2;
++
++#ifdef	CONFIG_USB_GADGET_DUALSPEED
++	if (rndis)
++		dev_qualifier.bNumConfigurations = 2;
++	else if (!cdc)
++		dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
++
++	/* assumes ep0 uses the same value for both speeds ... */
++	dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
++
++	/* and that all endpoints are dual-speed */
++	hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
++	hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
++#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
++	if (EP_STATUS_NAME)
++		hs_status_desc.bEndpointAddress =
++				fs_status_desc.bEndpointAddress;
++#endif
++#endif	/* DUALSPEED */
++
++	device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
++	usb_gadget_set_selfpowered (gadget);
++
++	if (gadget->is_otg) {
++		otg_descriptor.bmAttributes |= USB_OTG_HNP,
++		eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++		eth_config.bMaxPower = 4;
++#ifdef	CONFIG_USB_ETH_RNDIS
++		rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++		rndis_config.bMaxPower = 4;
++#endif
++	}
++
++ 	net = alloc_etherdev (sizeof *dev);
++ 	if (!net)
++		return status;
++	dev = netdev_priv(net);
++	spin_lock_init (&dev->lock);
++	INIT_WORK (&dev->work, eth_work, dev);
++	INIT_LIST_HEAD (&dev->tx_reqs);
++	INIT_LIST_HEAD (&dev->rx_reqs);
++
++	/* network device setup */
++	dev->net = net;
++	SET_MODULE_OWNER (net);
++	strcpy (net->name, "usb%d");
++	dev->cdc = cdc;
++	dev->zlp = zlp;
++
++	dev->in_ep = in_ep;
++	dev->out_ep = out_ep;
++	dev->status_ep = status_ep;
++
++	/* Module params for these addresses should come from ID proms.
++	 * The host side address is used with CDC and RNDIS, and commonly
++	 * ends up in a persistent config database.
++	 */
++	get_ether_addr(dev_addr, net->dev_addr);
++	if (cdc || rndis) {
++		get_ether_addr(host_addr, dev->host_mac);
++#ifdef	DEV_CONFIG_CDC
++		snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X",
++			dev->host_mac [0], dev->host_mac [1],
++			dev->host_mac [2], dev->host_mac [3],
++			dev->host_mac [4], dev->host_mac [5]);
++#endif
++	}
++
++	if (rndis) {
++		status = rndis_init();
++		if (status < 0) {
++			printk (KERN_ERR "%s: can't init RNDIS, %d\n",
++				shortname, status);
++			goto fail;
++		}
++	}
++
++	net->change_mtu = eth_change_mtu;
++	net->get_stats = eth_get_stats;
++	net->hard_start_xmit = eth_start_xmit;
++	net->open = eth_open;
++	net->stop = eth_stop;
++	// watchdog_timeo, tx_timeout ...
++	// set_multicast_list
++	net->do_ioctl = eth_ioctl;
++
++	/* preallocate control message data and buffer */
++	dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ);
++	if (!dev->req)
++		goto fail;
++	dev->req->complete = eth_setup_complete;
++
++	/* PO: this code my be reached with STATUS_BYTECOUNT undefined
++		Don't allocate stat_req then?!
++	 */
++#ifdef STATUS_BYTECOUNT
++	/* ... and maybe likewise for status transfer */
++	if (dev->status_ep) {
++		dev->stat_req = eth_req_alloc (dev->status_ep,
++					STATUS_BYTECOUNT);
++		if (!dev->stat_req) {
++			eth_req_free (gadget->ep0, dev->req);
++			goto fail;
++		}
++	}
++#endif
++
++	/* finish hookup to lower layer ... */
++	dev->gadget = gadget;
++	set_gadget_data (gadget, dev);
++	gadget->ep0->driver_data = dev;
++	
++	/* two kinds of host-initiated state changes:
++	 *  - iff DATA transfer is active, carrier is "on"
++	 *  - tx queueing enabled if open *and* carrier is "on"
++	 */
++	netif_stop_queue (dev->net);
++	netif_carrier_off (dev->net);
++
++ 	// SET_NETDEV_DEV (dev->net, &gadget->dev);
++ 	status = register_netdev (dev->net);
++	if (status < 0)
++		goto fail1;
++
++	INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
++	INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name,
++		EP_OUT_NAME, EP_IN_NAME,
++		EP_STATUS_NAME ? " STATUS " : "",
++		EP_STATUS_NAME ? EP_STATUS_NAME : ""
++		);
++	INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
++		net->dev_addr [0], net->dev_addr [1],
++		net->dev_addr [2], net->dev_addr [3],
++		net->dev_addr [4], net->dev_addr [5]);
++
++	if (cdc || rndis)
++		INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
++			dev->host_mac [0], dev->host_mac [1],
++			dev->host_mac [2], dev->host_mac [3],
++			dev->host_mac [4], dev->host_mac [5]);
++
++#ifdef	CONFIG_USB_ETH_RNDIS
++	if (rndis) {
++		u32	vendorID = 0;
++
++		/* FIXME RNDIS vendor id == "vendor NIC code" == ? */
++		
++		dev->rndis_config = rndis_register (rndis_control_ack);
++		if (dev->rndis_config < 0) {
++fail0:
++			unregister_netdev (dev->net);
++			status = -ENODEV;
++			goto fail;
++		}
++		
++		/* these set up a lot of the OIDs that RNDIS needs */
++		rndis_set_host_mac (dev->rndis_config, dev->host_mac);
++		if (rndis_set_param_dev (dev->rndis_config, dev->net,
++					 &dev->stats))
++			goto fail0;
++		if (rndis_set_param_vendor (dev->rndis_config, vendorID,
++					    manufacturer))
++			goto fail0;
++		if (rndis_set_param_medium (dev->rndis_config,
++					    NDIS_MEDIUM_802_3,
++					    0))
++			goto fail0;
++		INFO (dev, "RNDIS ready\n");
++	}
++#endif	
++
++	return status;
++
++fail1:
++	DEBUG (dev, "register_netdev failed, %d\n", status);
++fail:
++	eth_unbind (gadget);
++	return status;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void
++eth_suspend (struct usb_gadget *gadget)
++{
++	struct eth_dev		*dev = get_gadget_data (gadget);
++
++	DEBUG (dev, "suspend\n");
++	dev->suspended = 1;
++}
++
++static void
++eth_resume (struct usb_gadget *gadget)
++{
++	struct eth_dev		*dev = get_gadget_data (gadget);
++
++	DEBUG (dev, "resume\n");
++	dev->suspended = 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_gadget_driver eth_driver = {
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	.speed		= USB_SPEED_HIGH,
++#else
++	.speed		= USB_SPEED_FULL,
++#endif
++	.function	= (char *) driver_desc,
++	.bind		= eth_bind,
++	.unbind		= eth_unbind,
++
++	.setup		= eth_setup,
++	.disconnect	= eth_disconnect,
++
++	/* PO: is this available? */
++	.suspend	= eth_suspend,
++	.resume		= eth_resume,
++
++	.driver 	= {
++		.name		= (char *) shortname,
++		// .shutdown = ...
++		// .suspend = ...
++		// .resume = ...
++	},
++};
++
++MODULE_DESCRIPTION (DRIVER_DESC);
++MODULE_AUTHOR ("David Brownell, Benedikt Spanger");
++MODULE_LICENSE ("GPL");
++
++
++static int __init init (void)
++{
++	return usb_gadget_register_driver (&eth_driver);
++}
++module_init (init);
++
++static void __exit cleanup (void)
++{
++	usb_gadget_unregister_driver (&eth_driver);
++}
++module_exit (cleanup);
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/file_storage.c kernel/drivers/usb/gadget/file_storage.c
+--- /tmp/kernel/drivers/usb/gadget/file_storage.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/file_storage.c	2005-04-22 17:53:19.431540004 +0200
+@@ -0,0 +1,3939 @@
++/*
++ * file_storage.c -- File-backed USB Storage Gadget, for USB development
++ *
++ * Copyright (C) 2003, 2004 Alan Stern
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ *    notice, this list of conditions, and the following disclaimer,
++ *    without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ *    notice, this list of conditions and the following disclaimer in the
++ *    documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ *    to endorse or promote products derived from this software without
++ *    specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") as published by the Free Software
++ * Foundation, either version 2 of that License or (at your option) any
++ * later version.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++
++/*
++ * The File-backed Storage Gadget acts as a USB Mass Storage device,
++ * appearing to the host as a disk drive.  In addition to providing an
++ * example of a genuinely useful gadget driver for a USB device, it also
++ * illustrates a technique of double-buffering for increased throughput.
++ * Last but not least, it gives an easy way to probe the behavior of the
++ * Mass Storage drivers in a USB host.
++ *
++ * Backing storage is provided by a regular file or a block device, specified
++ * by the "file" module parameter.  Access can be limited to read-only by
++ * setting the optional "ro" module parameter.
++ *
++ * The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI),
++ * and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected
++ * by the optional "transport" module parameter.  It also supports the
++ * following protocols: RBC (0x01), ATAPI or SFF-8020i (0x02), QIC-157 (0c03),
++ * UFI (0x04), SFF-8070i (0x05), and transparent SCSI (0x06), selected by
++ * the optional "protocol" module parameter.  For testing purposes the
++ * gadget will indicate that it has removable media if the optional
++ * "removable" module parameter is set.  In addition, the default Vendor ID,
++ * Product ID, and release number can be overridden.
++ *
++ * There is support for multiple logical units (LUNs), each of which has
++ * its own backing file.  The number of LUNs can be set using the optional
++ * "luns" module parameter (anywhere from 1 to 8), and the corresponding
++ * files are specified using comma-separated lists for "file" and "ro".
++ * The default number of LUNs is taken from the number of "file" elements;
++ * it is 1 if "file" is not given.  If "removable" is not set then a backing
++ * file must be specified for each LUN.  If it is set, then an unspecified
++ * or empty backing filename means the LUN's medium is not loaded.
++ *
++ * Requirements are modest; only a bulk-in and a bulk-out endpoint are
++ * needed (an interrupt-out endpoint is also needed for CBI).  The memory
++ * requirement amounts to two 16K buffers, size configurable by a parameter.
++ * Support is included for both full-speed and high-speed operation.
++ *
++ * Module options:
++ *
++ *	file=filename[,filename...]
++ *				Required if "removable" is not set, names of
++ *					the files or block devices used for
++ *					backing storage
++ *	ro=b[,b...]		Default false, booleans for read-only access
++ *	luns=N			Default N = number of filenames, number of
++ *					LUNs to support
++ *	transport=XXX		Default BBB, transport name (CB, CBI, or BBB)
++ *	protocol=YYY		Default SCSI, protocol name (RBC, 8020 or
++ *					ATAPI, QIC, UFI, 8070, or SCSI;
++ *					also 1 - 6)
++ *	removable		Default false, boolean for removable media
++ *	vendor=0xVVVV		Default 0x0525 (NetChip), USB Vendor ID
++ *	product=0xPPPP		Default 0xa4a5 (FSG), USB Product ID
++ *	release=0xRRRR		Override the USB release number (bcdDevice)
++ *	buflen=N		Default N=16384, buffer size used (will be
++ *					rounded down to a multiple of
++ *					PAGE_CACHE_SIZE)
++ *	stall			Default determined according to the type of
++ *					USB device controller (usually true),
++ *					boolean to permit the driver to halt
++ *					bulk endpoints
++ *
++ * If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file" and "ro"
++ * options are available; default values are used for everything else.
++ *
++ * This gadget driver is heavily based on "Gadget Zero" by David Brownell.
++ */
++
++
++/*
++ *				Driver Design
++ *
++ * The FSG driver is fairly straightforward.  There is a main kernel
++ * thread that handles most of the work.  Interrupt routines field
++ * callbacks from the controller driver: bulk- and interrupt-request
++ * completion notifications, endpoint-0 events, and disconnect events.
++ * Completion events are passed to the main thread by wakeup calls.  Many
++ * ep0 requests are handled at interrupt time, but SetInterface,
++ * SetConfiguration, and device reset requests are forwarded to the
++ * thread in the form of "exceptions" using SIGUSR1 signals (since they
++ * should interrupt any ongoing file I/O operations).
++ *
++ * The thread's main routine implements the standard command/data/status
++ * parts of a SCSI interaction.  It and its subroutines are full of tests
++ * for pending signals/exceptions -- all this polling is necessary since
++ * the kernel has no setjmp/longjmp equivalents.  (Maybe this is an
++ * indication that the driver really wants to be running in userspace.)
++ * An important point is that so long as the thread is alive it keeps an
++ * open reference to the backing file.  This will prevent unmounting
++ * the backing file's underlying filesystem and could cause problems
++ * during system shutdown, for example.  To prevent such problems, the
++ * thread catches INT, TERM, and KILL signals and converts them into
++ * an EXIT exception.
++ *
++ * In normal operation the main thread is started during the gadget's
++ * fsg_bind() callback and stopped during fsg_unbind().  But it can also
++ * exit when it receives a signal, and there's no point leaving the
++ * gadget running when the thread is dead.  So just before the thread
++ * exits, it deregisters the gadget driver.  This makes things a little
++ * tricky: The driver is deregistered at two places, and the exiting
++ * thread can indirectly call fsg_unbind() which in turn can tell the
++ * thread to exit.  The first problem is resolved through the use of the
++ * REGISTERED atomic bitflag; the driver will only be deregistered once.
++ * The second problem is resolved by having fsg_unbind() check
++ * fsg->state; it won't try to stop the thread if the state is already
++ * FSG_STATE_TERMINATED.
++ *
++ * To provide maximum throughput, the driver uses a circular pipeline of
++ * buffer heads (struct fsg_buffhd).  In principle the pipeline can be
++ * arbitrarily long; in practice the benefits don't justify having more
++ * than 2 stages (i.e., double buffering).  But it helps to think of the
++ * pipeline as being a long one.  Each buffer head contains a bulk-in and
++ * a bulk-out request pointer (since the buffer can be used for both
++ * output and input -- directions always are given from the host's
++ * point of view) as well as a pointer to the buffer and various state
++ * variables.
++ *
++ * Use of the pipeline follows a simple protocol.  There is a variable
++ * (fsg->next_buffhd_to_fill) that points to the next buffer head to use.
++ * At any time that buffer head may still be in use from an earlier
++ * request, so each buffer head has a state variable indicating whether
++ * it is EMPTY, FULL, or BUSY.  Typical use involves waiting for the
++ * buffer head to be EMPTY, filling the buffer either by file I/O or by
++ * USB I/O (during which the buffer head is BUSY), and marking the buffer
++ * head FULL when the I/O is complete.  Then the buffer will be emptied
++ * (again possibly by USB I/O, during which it is marked BUSY) and
++ * finally marked EMPTY again (possibly by a completion routine).
++ *
++ * A module parameter tells the driver to avoid stalling the bulk
++ * endpoints wherever the transport specification allows.  This is
++ * necessary for some UDCs like the SuperH, which cannot reliably clear a
++ * halt on a bulk endpoint.  However, under certain circumstances the
++ * Bulk-only specification requires a stall.  In such cases the driver
++ * will halt the endpoint and set a flag indicating that it should clear
++ * the halt in software during the next device reset.  Hopefully this
++ * will permit everything to work correctly.
++ *
++ * One subtle point concerns sending status-stage responses for ep0
++ * requests.  Some of these requests, such as device reset, can involve
++ * interrupting an ongoing file I/O operation, which might take an
++ * arbitrarily long time.  During that delay the host might give up on
++ * the original ep0 request and issue a new one.  When that happens the
++ * driver should not notify the host about completion of the original
++ * request, as the host will no longer be waiting for it.  So the driver
++ * assigns to each ep0 request a unique tag, and it keeps track of the
++ * tag value of the request associated with a long-running exception
++ * (device-reset, interface-change, or configuration-change).  When the
++ * exception handler is finished, the status-stage response is submitted
++ * only if the current ep0 request tag is equal to the exception request
++ * tag.  Thus only the most recently received ep0 request will get a
++ * status-stage response.
++ *
++ * Warning: This driver source file is too long.  It ought to be split up
++ * into a header file plus about 3 separate .c files, to handle the details
++ * of the Gadget, USB Mass Storage, and SCSI protocols.
++ */
++
++
++#undef DEBUG
++#undef VERBOSE
++#undef DUMP_MSGS
++
++#include <linux/config.h>
++
++#include <asm/system.h>
++#include <asm/uaccess.h>
++
++#include <linux/bitops.h>
++#include <linux/blkdev.h>
++#include <linux/compiler.h>
++#include <linux/completion.h>
++#include <linux/dcache.h>
++#include <linux/fcntl.h>
++#include <linux/file.h>
++#include <linux/fs.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/limits.h>
++#include <linux/list.h>
++#include <linux/module.h>
++#include <linux/pagemap.h>
++#include <linux/rwsem.h>
++#include <linux/sched.h>
++#include <linux/signal.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++#include <linux/string.h>
++#include <linux/uts.h>
++#include <linux/version.h>
++#include <linux/wait.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include "gadget_chips.h"
++
++
++/*-------------------------------------------------------------------------*/
++
++#define DRIVER_DESC		"File-backed Storage Gadget"
++#define DRIVER_NAME		"g_file_storage"
++#define DRIVER_VERSION		"05 June 2004"
++
++static const char longname[] = DRIVER_DESC;
++static const char shortname[] = DRIVER_NAME;
++
++MODULE_DESCRIPTION(DRIVER_DESC);
++MODULE_AUTHOR("Alan Stern");
++MODULE_LICENSE("Dual BSD/GPL");
++
++/* Thanks to NetChip Technologies for donating this product ID.
++ *
++ * DO NOT REUSE THESE IDs with any other driver!!  Ever!!
++ * Instead:  allocate your own, using normal USB-IF procedures. */
++#define DRIVER_VENDOR_ID	0x0525	// NetChip
++#define DRIVER_PRODUCT_ID	0xa4a5	// Linux-USB File-backed Storage Gadget
++
++
++/*
++ * This driver assumes self-powered hardware and has no way for users to
++ * trigger remote wakeup.  It uses autoconfiguration to select endpoints
++ * and endpoint addresses.
++ */
++
++
++/*-------------------------------------------------------------------------*/
++
++#define fakedev_printk(level, dev, format, args...) \
++	printk(level "%s %s: " format , DRIVER_NAME , (dev)->name , ## args)
++
++#define xprintk(f,level,fmt,args...) \
++	fakedev_printk(level , (f)->gadget , fmt , ## args)
++#define yprintk(l,level,fmt,args...) \
++	fakedev_printk(level , &(l)->dev , fmt , ## args)
++
++#ifdef DEBUG
++#define DBG(fsg,fmt,args...) \
++	xprintk(fsg , KERN_DEBUG , fmt , ## args)
++#define LDBG(lun,fmt,args...) \
++	yprintk(lun , KERN_DEBUG , fmt , ## args)
++#define MDBG(fmt,args...) \
++	printk(KERN_DEBUG DRIVER_NAME ": " fmt , ## args)
++#else
++#define DBG(fsg,fmt,args...) \
++	do { } while (0)
++#define LDBG(lun,fmt,args...) \
++	do { } while (0)
++#define MDBG(fmt,args...) \
++	do { } while (0)
++#undef VERBOSE
++#undef DUMP_MSGS
++#endif /* DEBUG */
++
++#ifdef VERBOSE
++#define VDBG	DBG
++#define VLDBG	LDBG
++#else
++#define VDBG(fsg,fmt,args...) \
++	do { } while (0)
++#define VLDBG(lun,fmt,args...) \
++	do { } while (0)
++#endif /* VERBOSE */
++
++#define ERROR(fsg,fmt,args...) \
++	xprintk(fsg , KERN_ERR , fmt , ## args)
++#define LERROR(lun,fmt,args...) \
++	yprintk(lun , KERN_ERR , fmt , ## args)
++
++#define WARN(fsg,fmt,args...) \
++	xprintk(fsg , KERN_WARNING , fmt , ## args)
++#define LWARN(lun,fmt,args...) \
++	yprintk(lun , KERN_WARNING , fmt , ## args)
++
++#define INFO(fsg,fmt,args...) \
++	xprintk(fsg , KERN_INFO , fmt , ## args)
++#define LINFO(lun,fmt,args...) \
++	yprintk(lun , KERN_INFO , fmt , ## args)
++
++#define MINFO(fmt,args...) \
++	printk(KERN_INFO DRIVER_NAME ": " fmt , ## args)
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Encapsulate the module parameter settings */
++
++#define MAX_LUNS	8
++
++static char		*file[MAX_LUNS] = {NULL, };
++static int		ro[MAX_LUNS] = {0, };
++static unsigned int	luns = 0;
++						// Default values
++static char 		*transport = "BBB";
++static char 		*protocol = "SCSI";
++static int 		removable = 0;
++static unsigned short	vendor = DRIVER_VENDOR_ID;
++static unsigned short	product = DRIVER_PRODUCT_ID;
++static unsigned short	release = 0xffff;	// Use controller chip type
++static unsigned int	buflen = 16384;
++static int		stall = 1;
++
++static struct {
++	unsigned int	nluns;
++
++	char		*transport_parm;
++	char		*protocol_parm;
++	int		removable;
++	unsigned short	vendor;
++	unsigned short	product;
++	unsigned short	release;
++	unsigned int	buflen;
++	int		can_stall;
++
++	int		transport_type;
++	char		*transport_name;
++	int		protocol_type;
++	char		*protocol_name;
++
++} mod_data;
++
++
++MODULE_PARM(file, "1-8s");
++MODULE_PARM_DESC(file, "names of backing files or devices");
++
++MODULE_PARM(ro, "1-8b");
++MODULE_PARM_DESC(ro, "true to force read-only");
++
++
++/* In the non-TEST version, only the file and ro module parameters
++ * are available. */
++#ifdef CONFIG_USB_FILE_STORAGE_TEST
++
++MODULE_PARM(luns, "i");
++MODULE_PARM_DESC(luns, "number of LUNs");
++
++MODULE_PARM(transport, "s");
++MODULE_PARM_DESC(transport, "type of transport (BBB, CBI, or CB)");
++
++MODULE_PARM(protocol, "s");
++MODULE_PARM_DESC(protocol, "type of protocol (RBC, 8020, QIC, UFI, "
++		"8070, or SCSI)");
++
++MODULE_PARM(removable, "b");
++MODULE_PARM_DESC(removable, "true to simulate removable media");
++
++MODULE_PARM(vendor, "h");
++MODULE_PARM_DESC(vendor, "USB Vendor ID");
++
++MODULE_PARM(product, "h");
++MODULE_PARM_DESC(product, "USB Product ID");
++
++MODULE_PARM(release, "h");
++MODULE_PARM_DESC(release, "USB release number");
++
++MODULE_PARM(buflen, "i");
++MODULE_PARM_DESC(buflen, "I/O buffer size");
++
++MODULE_PARM(stall, "i");
++MODULE_PARM_DESC(stall, "false to prevent bulk stalls");
++
++#endif /* CONFIG_USB_FILE_STORAGE_TEST */
++
++
++/*-------------------------------------------------------------------------*/
++
++/* USB protocol value = the transport method */
++#define USB_PR_CBI	0x00		// Control/Bulk/Interrupt
++#define USB_PR_CB	0x01		// Control/Bulk w/o interrupt
++#define USB_PR_BULK	0x50		// Bulk-only
++
++/* USB subclass value = the protocol encapsulation */
++#define USB_SC_RBC	0x01		// Reduced Block Commands (flash)
++#define USB_SC_8020	0x02		// SFF-8020i, MMC-2, ATAPI (CD-ROM)
++#define USB_SC_QIC	0x03		// QIC-157 (tape)
++#define USB_SC_UFI	0x04		// UFI (floppy)
++#define USB_SC_8070	0x05		// SFF-8070i (removable)
++#define USB_SC_SCSI	0x06		// Transparent SCSI
++
++/* Bulk-only data structures */
++
++/* Command Block Wrapper */
++struct bulk_cb_wrap {
++	u32	Signature;		// Contains 'USBC'
++	u32	Tag;			// Unique per command id
++	u32	DataTransferLength;	// Size of the data
++	u8	Flags;			// Direction in bit 7
++	u8	Lun;			// LUN (normally 0)
++	u8	Length;			// Of the CDB, <= MAX_COMMAND_SIZE
++	u8	CDB[16];		// Command Data Block
++};
++
++#define USB_BULK_CB_WRAP_LEN	31
++#define USB_BULK_CB_SIG		0x43425355	// Spells out USBC
++#define USB_BULK_IN_FLAG	0x80
++
++/* Command Status Wrapper */
++struct bulk_cs_wrap {
++	u32	Signature;		// Should = 'USBS'
++	u32	Tag;			// Same as original command
++	u32	Residue;		// Amount not transferred
++	u8	Status;			// See below
++};
++
++#define USB_BULK_CS_WRAP_LEN	13
++#define USB_BULK_CS_SIG		0x53425355	// Spells out 'USBS'
++#define USB_STATUS_PASS		0
++#define USB_STATUS_FAIL		1
++#define USB_STATUS_PHASE_ERROR	2
++
++/* Bulk-only class specific requests */
++#define USB_BULK_RESET_REQUEST		0xff
++#define USB_BULK_GET_MAX_LUN_REQUEST	0xfe
++
++
++/* CBI Interrupt data structure */
++struct interrupt_data {
++	u8	bType;
++	u8	bValue;
++};
++
++#define CBI_INTERRUPT_DATA_LEN		2
++
++/* CBI Accept Device-Specific Command request */
++#define USB_CBI_ADSC_REQUEST		0x00
++
++
++#define MAX_COMMAND_SIZE	16	// Length of a SCSI Command Data Block
++
++/* SCSI commands that we recognize */
++#define SC_FORMAT_UNIT			0x04
++#define SC_INQUIRY			0x12
++#define SC_MODE_SELECT_6		0x15
++#define SC_MODE_SELECT_10		0x55
++#define SC_MODE_SENSE_6			0x1a
++#define SC_MODE_SENSE_10		0x5a
++#define SC_PREVENT_ALLOW_MEDIUM_REMOVAL	0x1e
++#define SC_READ_6			0x08
++#define SC_READ_10			0x28
++#define SC_READ_12			0xa8
++#define SC_READ_CAPACITY		0x25
++#define SC_READ_FORMAT_CAPACITIES	0x23
++#define SC_RELEASE			0x17
++#define SC_REQUEST_SENSE		0x03
++#define SC_RESERVE			0x16
++#define SC_SEND_DIAGNOSTIC		0x1d
++#define SC_START_STOP_UNIT		0x1b
++#define SC_SYNCHRONIZE_CACHE		0x35
++#define SC_TEST_UNIT_READY		0x00
++#define SC_VERIFY			0x2f
++#define SC_WRITE_6			0x0a
++#define SC_WRITE_10			0x2a
++#define SC_WRITE_12			0xaa
++
++/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
++#define SS_NO_SENSE				0
++#define SS_COMMUNICATION_FAILURE		0x040800
++#define SS_INVALID_COMMAND			0x052000
++#define SS_INVALID_FIELD_IN_CDB			0x052400
++#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE	0x052100
++#define SS_LOGICAL_UNIT_NOT_SUPPORTED		0x052500
++#define SS_MEDIUM_NOT_PRESENT			0x023a00
++#define SS_MEDIUM_REMOVAL_PREVENTED		0x055302
++#define SS_NOT_READY_TO_READY_TRANSITION	0x062800
++#define SS_RESET_OCCURRED			0x062900
++#define SS_SAVING_PARAMETERS_NOT_SUPPORTED	0x053900
++#define SS_UNRECOVERED_READ_ERROR		0x031100
++#define SS_WRITE_ERROR				0x030c02
++#define SS_WRITE_PROTECTED			0x072700
++
++#define SK(x)		((u8) ((x) >> 16))	// Sense Key byte, etc.
++#define ASC(x)		((u8) ((x) >> 8))
++#define ASCQ(x)		((u8) (x))
++
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * These definitions will permit the compiler to avoid generating code for
++ * parts of the driver that aren't used in the non-TEST version.  Even gcc
++ * can recognize when a test of a constant expression yields a dead code
++ * path.
++ *
++ * Also, in the non-TEST version, open_backing_file() is only used during
++ * initialization and the sysfs attribute store_xxx routines aren't used
++ * at all.  We will define NORMALLY_INIT to mark them as __init so they
++ * don't occupy kernel code space unnecessarily.
++ */
++
++#ifdef CONFIG_USB_FILE_STORAGE_TEST
++
++#define transport_is_bbb()	(mod_data.transport_type == USB_PR_BULK)
++#define transport_is_cbi()	(mod_data.transport_type == USB_PR_CBI)
++#define protocol_is_scsi()	(mod_data.protocol_type == USB_SC_SCSI)
++#define backing_file_is_open(curlun)	((curlun)->filp != NULL)
++#define NORMALLY_INIT
++
++#else
++
++#define transport_is_bbb()	1
++#define transport_is_cbi()	0
++#define protocol_is_scsi()	1
++#define backing_file_is_open(curlun)	1
++#define NORMALLY_INIT		__init
++
++#endif /* CONFIG_USB_FILE_STORAGE_TEST */
++
++
++struct lun {
++	struct file	*filp;
++	loff_t		file_length;
++	loff_t		num_sectors;
++
++	unsigned int	ro : 1;
++	unsigned int	prevent_medium_removal : 1;
++	unsigned int	registered : 1;
++
++	u32		sense_data;
++	u32		sense_data_info;
++	u32		unit_attention_data;
++
++#define BUS_ID_SIZE	20
++	struct __lun_device {
++		char	name[BUS_ID_SIZE];
++		void	*driver_data;
++	} dev;
++};
++
++
++/* Big enough to hold our biggest descriptor */
++#define EP0_BUFSIZE	256
++#define DELAYED_STATUS	(EP0_BUFSIZE + 999)	// An impossibly large value
++
++/* Number of buffers we will use.  2 is enough for double-buffering */
++#define NUM_BUFFERS	2
++
++enum fsg_buffer_state {
++	BUF_STATE_EMPTY = 0,
++	BUF_STATE_FULL,
++	BUF_STATE_BUSY
++};
++
++struct fsg_buffhd {
++	void				*buf;
++	dma_addr_t			dma;
++	volatile enum fsg_buffer_state	state;
++	struct fsg_buffhd		*next;
++
++	/* The NetChip 2280 is faster, and handles some protocol faults
++	 * better, if we don't submit any short bulk-out read requests.
++	 * So we will record the intended request length here. */
++	unsigned int			bulk_out_intended_length;
++
++	struct usb_request		*inreq;
++	volatile int			inreq_busy;
++	struct usb_request		*outreq;
++	volatile int			outreq_busy;
++};
++
++enum fsg_state {
++	FSG_STATE_COMMAND_PHASE = -10,		// This one isn't used anywhere
++	FSG_STATE_DATA_PHASE,
++	FSG_STATE_STATUS_PHASE,
++
++	FSG_STATE_IDLE = 0,
++	FSG_STATE_ABORT_BULK_OUT,
++	FSG_STATE_RESET,
++	FSG_STATE_INTERFACE_CHANGE,
++	FSG_STATE_CONFIG_CHANGE,
++	FSG_STATE_DISCONNECT,
++	FSG_STATE_EXIT,
++	FSG_STATE_TERMINATED
++};
++
++enum data_direction {
++	DATA_DIR_UNKNOWN = 0,
++	DATA_DIR_FROM_HOST,
++	DATA_DIR_TO_HOST,
++	DATA_DIR_NONE
++};
++
++struct fsg_dev {
++	/* lock protects: state, all the req_busy's, and cbbuf_cmnd */
++	spinlock_t		lock;
++	struct usb_gadget	*gadget;
++
++	/* filesem protects: backing files in use */
++	struct rw_semaphore	filesem;
++
++	struct usb_ep		*ep0;		// Handy copy of gadget->ep0
++	struct usb_request	*ep0req;	// For control responses
++	volatile unsigned int	ep0_req_tag;
++	const char		*ep0req_name;
++
++	struct usb_request	*intreq;	// For interrupt responses
++	volatile int		intreq_busy;
++	struct fsg_buffhd	*intr_buffhd;
++
++ 	unsigned int		bulk_out_maxpacket;
++	enum fsg_state		state;		// For exception handling
++	unsigned int		exception_req_tag;
++
++	u8			config, new_config;
++
++	unsigned int		running : 1;
++	unsigned int		bulk_in_enabled : 1;
++	unsigned int		bulk_out_enabled : 1;
++	unsigned int		intr_in_enabled : 1;
++	unsigned int		phase_error : 1;
++	unsigned int		short_packet_received : 1;
++	unsigned int		bad_lun_okay : 1;
++
++	unsigned long		atomic_bitflags;
++#define REGISTERED		0
++#define CLEAR_BULK_HALTS	1
++
++	struct usb_ep		*bulk_in;
++	struct usb_ep		*bulk_out;
++	struct usb_ep		*intr_in;
++
++	struct fsg_buffhd	*next_buffhd_to_fill;
++	struct fsg_buffhd	*next_buffhd_to_drain;
++	struct fsg_buffhd	buffhds[NUM_BUFFERS];
++
++	wait_queue_head_t	thread_wqh;
++	int			thread_wakeup_needed;
++	struct completion	thread_notifier;
++	int			thread_pid;
++	struct task_struct	*thread_task;
++	sigset_t		thread_signal_mask;
++
++	int			cmnd_size;
++	u8			cmnd[MAX_COMMAND_SIZE];
++	enum data_direction	data_dir;
++	u32			data_size;
++	u32			data_size_from_cmnd;
++	u32			tag;
++	unsigned int		lun;
++	u32			residue;
++	u32			usb_amount_left;
++
++	/* The CB protocol offers no way for a host to know when a command
++	 * has completed.  As a result the next command may arrive early,
++	 * and we will still have to handle it.  For that reason we need
++	 * a buffer to store new commands when using CB (or CBI, which
++	 * does not oblige a host to wait for command completion either). */
++	int			cbbuf_cmnd_size;
++	u8			cbbuf_cmnd[MAX_COMMAND_SIZE];
++
++	unsigned int		nluns;
++	struct lun		*luns;
++	struct lun		*curlun;
++};
++
++typedef void (*fsg_routine_t)(struct fsg_dev *);
++
++static int inline exception_in_progress(struct fsg_dev *fsg)
++{
++	return (fsg->state > FSG_STATE_IDLE);
++}
++
++/* Make bulk-out requests be divisible by the maxpacket size */
++static void inline set_bulk_out_req_length(struct fsg_dev *fsg,
++		struct fsg_buffhd *bh, unsigned int length)
++{
++	unsigned int	rem;
++
++	bh->bulk_out_intended_length = length;
++	rem = length % fsg->bulk_out_maxpacket;
++	if (rem > 0)
++		length += fsg->bulk_out_maxpacket - rem;
++	bh->outreq->length = length;
++}
++
++static struct fsg_dev			*the_fsg;
++static struct usb_gadget_driver		fsg_driver;
++
++static void	close_backing_file(struct lun *curlun);
++static void	close_all_backing_files(struct fsg_dev *fsg);
++
++
++/*-------------------------------------------------------------------------*/
++
++#ifdef DUMP_MSGS
++
++static void dump_msg(struct fsg_dev *fsg, const char *label,
++		const u8 *buf, unsigned int length)
++{
++	unsigned int	start, num, i;
++	char		line[52], *p;
++
++	if (length >= 512)
++		return;
++	DBG(fsg, "%s, length %u:\n", label, length);
++
++	start = 0;
++	while (length > 0) {
++		num = min(length, 16u);
++		p = line;
++		for (i = 0; i < num; ++i) {
++			if (i == 8)
++				*p++ = ' ';
++			sprintf(p, " %02x", buf[i]);
++			p += 3;
++		}
++		*p = 0;
++		printk(KERN_DEBUG "%6x: %s\n", start, line);
++		buf += num;
++		start += num;
++		length -= num;
++	}
++}
++
++static void inline dump_cdb(struct fsg_dev *fsg)
++{}
++
++#else
++
++static void inline dump_msg(struct fsg_dev *fsg, const char *label,
++		const u8 *buf, unsigned int length)
++{}
++
++static void inline dump_cdb(struct fsg_dev *fsg)
++{
++	int	i;
++	char	cmdbuf[3*MAX_COMMAND_SIZE + 1];
++
++	for (i = 0; i < fsg->cmnd_size; ++i)
++		sprintf(cmdbuf + i*3, " %02x", fsg->cmnd[i]);
++	VDBG(fsg, "SCSI CDB: %s\n", cmdbuf);
++}
++
++#endif /* DUMP_MSGS */
++
++
++static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
++{
++	const char	*name;
++
++	if (ep == fsg->bulk_in)
++		name = "bulk-in";
++	else if (ep == fsg->bulk_out)
++		name = "bulk-out";
++	else
++		name = ep->name;
++	DBG(fsg, "%s set halt\n", name);
++	return usb_ep_set_halt(ep);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Routines for unaligned data access */
++
++static u16 inline get_be16(u8 *buf)
++{
++	return ((u16) buf[0] << 8) | ((u16) buf[1]);
++}
++
++static u32 inline get_be32(u8 *buf)
++{
++	return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) |
++			((u32) buf[2] << 8) | ((u32) buf[3]);
++}
++
++static void inline put_be16(u8 *buf, u16 val)
++{
++	buf[0] = val >> 8;
++	buf[1] = val;
++}
++
++static void inline put_be32(u8 *buf, u32 val)
++{
++	buf[0] = val >> 24;
++	buf[1] = val >> 16;
++	buf[2] = val >> 8;
++	buf[3] = val;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * DESCRIPTORS ... most are static, but strings and (full) configuration
++ * descriptors are built on demand.  Also the (static) config and interface
++ * descriptors are adjusted during fsg_bind().
++ */
++#define STRING_MANUFACTURER	1
++#define STRING_PRODUCT		2
++#define STRING_SERIAL		3
++
++/* There is only one configuration. */
++#define	CONFIG_VALUE		1
++
++static struct usb_device_descriptor
++device_desc = {
++	.bLength =		sizeof device_desc,
++	.bDescriptorType =	USB_DT_DEVICE,
++
++	.bcdUSB =		__constant_cpu_to_le16(0x0200),
++	.bDeviceClass =		USB_CLASS_PER_INTERFACE,
++
++	/* The next three values can be overridden by module parameters */
++	.idVendor =		__constant_cpu_to_le16(DRIVER_VENDOR_ID),
++	.idProduct =		__constant_cpu_to_le16(DRIVER_PRODUCT_ID),
++	.bcdDevice =		__constant_cpu_to_le16(0xffff),
++
++	.iManufacturer =	STRING_MANUFACTURER,
++	.iProduct =		STRING_PRODUCT,
++	.iSerialNumber =	STRING_SERIAL,
++	.bNumConfigurations =	1,
++};
++
++static struct usb_config_descriptor
++config_desc = {
++	.bLength =		sizeof config_desc,
++	.bDescriptorType =	USB_DT_CONFIG,
++
++	/* wTotalLength computed by usb_gadget_config_buf() */
++	.bNumInterfaces =	1,
++	.bConfigurationValue =	CONFIG_VALUE,
++	.bmAttributes =		USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
++	.bMaxPower =		1,	// self-powered
++};
++
++/* There is only one interface. */
++
++static struct usb_interface_descriptor
++intf_desc = {
++	.bLength =		sizeof intf_desc,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bNumEndpoints =	2,		// Adjusted during fsg_bind()
++	.bInterfaceClass =	USB_CLASS_MASS_STORAGE,
++	.bInterfaceSubClass =	USB_SC_SCSI,	// Adjusted during fsg_bind()
++	.bInterfaceProtocol =	USB_PR_BULK,	// Adjusted during fsg_bind()
++};
++
++/* Three full-speed endpoint descriptors: bulk-in, bulk-out,
++ * and interrupt-in. */
++
++static struct usb_endpoint_descriptor
++fs_bulk_in_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_IN,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	/* wMaxPacketSize set by autoconfiguration */
++};
++
++static struct usb_endpoint_descriptor
++fs_bulk_out_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_OUT,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	/* wMaxPacketSize set by autoconfiguration */
++};
++
++static struct usb_endpoint_descriptor
++fs_intr_in_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_IN,
++	.bmAttributes =		USB_ENDPOINT_XFER_INT,
++	.wMaxPacketSize =	__constant_cpu_to_le16(2),
++	.bInterval =		32,	// frames -> 32 ms
++};
++
++static const struct usb_descriptor_header *fs_function[] = {
++	(struct usb_descriptor_header *) &intf_desc,
++	(struct usb_descriptor_header *) &fs_bulk_in_desc,
++	(struct usb_descriptor_header *) &fs_bulk_out_desc,
++	(struct usb_descriptor_header *) &fs_intr_in_desc,
++	NULL,
++};
++
++
++#ifdef	CONFIG_USB_GADGET_DUALSPEED
++
++/*
++ * USB 2.0 devices need to expose both high speed and full speed
++ * descriptors, unless they only run at full speed.
++ *
++ * That means alternate endpoint descriptors (bigger packets)
++ * and a "device qualifier" ... plus more construction options
++ * for the config descriptor.
++ */
++static struct usb_qualifier_descriptor
++dev_qualifier = {
++	.bLength =		sizeof dev_qualifier,
++	.bDescriptorType =	USB_DT_DEVICE_QUALIFIER,
++
++	.bcdUSB =		__constant_cpu_to_le16(0x0200),
++	.bDeviceClass =		USB_CLASS_PER_INTERFACE,
++
++	.bNumConfigurations =	1,
++};
++
++static struct usb_endpoint_descriptor
++hs_bulk_in_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	/* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16(512),
++};
++
++static struct usb_endpoint_descriptor
++hs_bulk_out_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	/* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16(512),
++	.bInterval =		1,	// NAK every 1 uframe
++};
++
++static struct usb_endpoint_descriptor
++hs_intr_in_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	/* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
++	.bmAttributes =		USB_ENDPOINT_XFER_INT,
++	.wMaxPacketSize =	__constant_cpu_to_le16(2),
++	.bInterval =		9,	// 2**(9-1) = 256 uframes -> 32 ms
++};
++
++static const struct usb_descriptor_header *hs_function[] = {
++	(struct usb_descriptor_header *) &intf_desc,
++	(struct usb_descriptor_header *) &hs_bulk_in_desc,
++	(struct usb_descriptor_header *) &hs_bulk_out_desc,
++	(struct usb_descriptor_header *) &hs_intr_in_desc,
++	NULL,
++};
++
++/* Maxpacket and other transfer characteristics vary by speed. */
++#define ep_desc(g,fs,hs)	(((g)->speed==USB_SPEED_HIGH) ? (hs) : (fs))
++
++#else
++
++/* If there's no high speed support, always use the full-speed descriptor. */
++#define ep_desc(g,fs,hs)	fs
++
++#endif	/* !CONFIG_USB_GADGET_DUALSPEED */
++
++
++/* The CBI specification limits the serial string to 12 uppercase hexadecimal
++ * characters. */
++static char				manufacturer[40];
++static char				serial[13];
++
++/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
++static struct usb_string		strings[] = {
++	{STRING_MANUFACTURER,	manufacturer},
++	{STRING_PRODUCT,	longname},
++	{STRING_SERIAL,		serial},
++	{}
++};
++
++static struct usb_gadget_strings	stringtab = {
++	.language	= 0x0409,		// en-us
++	.strings	= strings,
++};
++
++
++/*
++ * Config descriptors must agree with the code that sets configurations
++ * and with code managing interfaces and their altsettings.  They must
++ * also handle different speeds and other-speed requests.
++ */
++static int populate_config_buf(enum usb_device_speed speed,
++		u8 *buf, u8 type, unsigned index)
++{
++	int					len;
++	const struct usb_descriptor_header	**function;
++
++	if (index > 0)
++		return -EINVAL;
++
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	if (type == USB_DT_OTHER_SPEED_CONFIG)
++		speed = (USB_SPEED_FULL + USB_SPEED_HIGH) - speed;
++	if (speed == USB_SPEED_HIGH)
++		function = hs_function;
++	else
++#endif
++		function = fs_function;
++
++	len = usb_gadget_config_buf(&config_desc, buf, EP0_BUFSIZE, function);
++	if (len < 0)
++		return len;
++	((struct usb_config_descriptor *) buf)->bDescriptorType = type;
++	return len;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* These routines may be called in process context or in_irq */
++
++static void wakeup_thread(struct fsg_dev *fsg)
++{
++	/* Tell the main thread that something has happened */
++	fsg->thread_wakeup_needed = 1;
++	wake_up_all(&fsg->thread_wqh);
++}
++
++
++static void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state)
++{
++	unsigned long		flags;
++	struct task_struct	*thread_task;
++
++	/* Do nothing if a higher-priority exception is already in progress.
++	 * If a lower-or-equal priority exception is in progress, preempt it
++	 * and notify the main thread by sending it a signal. */
++	spin_lock_irqsave(&fsg->lock, flags);
++	if (fsg->state <= new_state) {
++		fsg->exception_req_tag = fsg->ep0_req_tag;
++		fsg->state = new_state;
++		thread_task = fsg->thread_task;
++		if (thread_task)
++			send_sig_info(SIGUSR1, (void *) 1L, thread_task);
++	}
++	spin_unlock_irqrestore(&fsg->lock, flags);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* The disconnect callback and ep0 routines.  These always run in_irq,
++ * except that ep0_queue() is called in the main thread to acknowledge
++ * completion of various requests: set config, set interface, and
++ * Bulk-only device reset. */
++
++static void fsg_disconnect(struct usb_gadget *gadget)
++{
++	struct fsg_dev		*fsg = get_gadget_data(gadget);
++
++	DBG(fsg, "disconnect or port reset\n");
++	raise_exception(fsg, FSG_STATE_DISCONNECT);
++}
++
++
++static int ep0_queue(struct fsg_dev *fsg)
++{
++	int	rc;
++
++	rc = usb_ep_queue(fsg->ep0, fsg->ep0req, GFP_ATOMIC);
++	if (rc != 0 && rc != -ESHUTDOWN) {
++
++		/* We can't do much more than wait for a reset */
++		WARN(fsg, "error in submission: %s --> %d\n",
++				fsg->ep0->name, rc);
++	}
++	return rc;
++}
++
++static void ep0_complete(struct usb_ep *ep, struct usb_request *req)
++{
++	struct fsg_dev		*fsg = (struct fsg_dev *) ep->driver_data;
++
++	if (req->actual > 0)
++		dump_msg(fsg, fsg->ep0req_name, req->buf, req->actual);
++	if (req->status || req->actual != req->length)
++		DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__,
++				req->status, req->actual, req->length);
++	if (req->status == -ECONNRESET)		// Request was cancelled
++		usb_ep_fifo_flush(ep);
++
++	if (req->status == 0 && req->context)
++		((fsg_routine_t) (req->context))(fsg);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Bulk and interrupt endpoint completion handlers.
++ * These always run in_irq. */
++
++static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
++{
++	struct fsg_dev		*fsg = (struct fsg_dev *) ep->driver_data;
++	struct fsg_buffhd	*bh = (struct fsg_buffhd *) req->context;
++
++	if (req->status || req->actual != req->length)
++		DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__,
++				req->status, req->actual, req->length);
++	if (req->status == -ECONNRESET)		// Request was cancelled
++		usb_ep_fifo_flush(ep);
++
++	/* Hold the lock while we update the request and buffer states */
++	spin_lock(&fsg->lock);
++	bh->inreq_busy = 0;
++	bh->state = BUF_STATE_EMPTY;
++	spin_unlock(&fsg->lock);
++	wakeup_thread(fsg);
++}
++
++static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
++{
++	struct fsg_dev		*fsg = (struct fsg_dev *) ep->driver_data;
++	struct fsg_buffhd	*bh = (struct fsg_buffhd *) req->context;
++
++	dump_msg(fsg, "bulk-out", req->buf, req->actual);
++	if (req->status || req->actual != bh->bulk_out_intended_length)
++		DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__,
++				req->status, req->actual,
++				bh->bulk_out_intended_length);
++	if (req->status == -ECONNRESET)		// Request was cancelled
++		usb_ep_fifo_flush(ep);
++
++	/* Hold the lock while we update the request and buffer states */
++	spin_lock(&fsg->lock);
++	bh->outreq_busy = 0;
++	bh->state = BUF_STATE_FULL;
++	spin_unlock(&fsg->lock);
++	wakeup_thread(fsg);
++}
++
++static void intr_in_complete(struct usb_ep *ep, struct usb_request *req)
++{
++#ifdef CONFIG_USB_FILE_STORAGE_TEST
++	struct fsg_dev		*fsg = (struct fsg_dev *) ep->driver_data;
++	struct fsg_buffhd	*bh = (struct fsg_buffhd *) req->context;
++
++	if (req->status || req->actual != req->length)
++		DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__,
++				req->status, req->actual, req->length);
++	if (req->status == -ECONNRESET)		// Request was cancelled
++		usb_ep_fifo_flush(ep);
++
++	/* Hold the lock while we update the request and buffer states */
++	spin_lock(&fsg->lock);
++	fsg->intreq_busy = 0;
++	bh->state = BUF_STATE_EMPTY;
++	spin_unlock(&fsg->lock);
++	wakeup_thread(fsg);
++#endif /* CONFIG_USB_FILE_STORAGE_TEST */
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Ep0 class-specific handlers.  These always run in_irq. */
++
++static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
++{
++#ifdef CONFIG_USB_FILE_STORAGE_TEST
++	struct usb_request	*req = fsg->ep0req;
++	static u8		cbi_reset_cmnd[6] = {
++			SC_SEND_DIAGNOSTIC, 4, 0xff, 0xff, 0xff, 0xff};
++
++	/* Error in command transfer? */
++	if (req->status || req->length != req->actual ||
++			req->actual < 6 || req->actual > MAX_COMMAND_SIZE) {
++
++		/* Not all controllers allow a protocol stall after
++		 * receiving control-out data, but we'll try anyway. */
++		fsg_set_halt(fsg, fsg->ep0);
++		return;			// Wait for reset
++	}
++
++	/* Is it the special reset command? */
++	if (req->actual >= sizeof cbi_reset_cmnd &&
++			memcmp(req->buf, cbi_reset_cmnd,
++				sizeof cbi_reset_cmnd) == 0) {
++
++		/* Raise an exception to stop the current operation
++		 * and reinitialize our state. */
++		DBG(fsg, "cbi reset request\n");
++		raise_exception(fsg, FSG_STATE_RESET);
++		return;
++	}
++
++	VDBG(fsg, "CB[I] accept device-specific command\n");
++	spin_lock(&fsg->lock);
++
++	/* Save the command for later */
++	if (fsg->cbbuf_cmnd_size)
++		WARN(fsg, "CB[I] overwriting previous command\n");
++	fsg->cbbuf_cmnd_size = req->actual;
++	memcpy(fsg->cbbuf_cmnd, req->buf, fsg->cbbuf_cmnd_size);
++
++	spin_unlock(&fsg->lock);
++	wakeup_thread(fsg);
++#endif /* CONFIG_USB_FILE_STORAGE_TEST */
++}
++
++
++static int class_setup_req(struct fsg_dev *fsg,
++		const struct usb_ctrlrequest *ctrl)
++{
++	struct usb_request	*req = fsg->ep0req;
++	int			value = -EOPNOTSUPP;
++
++	if (!fsg->config)
++		return value;
++
++	/* Handle Bulk-only class-specific requests */
++	if (transport_is_bbb()) {
++		switch (ctrl->bRequest) {
++
++		case USB_BULK_RESET_REQUEST:
++			if (ctrl->bRequestType != (USB_DIR_OUT |
++					USB_TYPE_CLASS | USB_RECIP_INTERFACE))
++				break;
++			if (ctrl->wIndex != 0) {
++				value = -EDOM;
++				break;
++			}
++
++			/* Raise an exception to stop the current operation
++			 * and reinitialize our state. */
++			DBG(fsg, "bulk reset request\n");
++			raise_exception(fsg, FSG_STATE_RESET);
++			value = DELAYED_STATUS;
++			break;
++
++		case USB_BULK_GET_MAX_LUN_REQUEST:
++			if (ctrl->bRequestType != (USB_DIR_IN |
++					USB_TYPE_CLASS | USB_RECIP_INTERFACE))
++				break;
++			if (ctrl->wIndex != 0) {
++				value = -EDOM;
++				break;
++			}
++			VDBG(fsg, "get max LUN\n");
++			*(u8 *) req->buf = fsg->nluns - 1;
++			value = min(ctrl->wLength, (u16) 1);
++			break;
++		}
++	}
++
++	/* Handle CBI class-specific requests */
++	else {
++		switch (ctrl->bRequest) {
++
++		case USB_CBI_ADSC_REQUEST:
++			if (ctrl->bRequestType != (USB_DIR_OUT |
++					USB_TYPE_CLASS | USB_RECIP_INTERFACE))
++				break;
++			if (ctrl->wIndex != 0) {
++				value = -EDOM;
++				break;
++			}
++			if (ctrl->wLength > MAX_COMMAND_SIZE) {
++				value = -EOVERFLOW;
++				break;
++			}
++			value = ctrl->wLength;
++			fsg->ep0req->context = received_cbi_adsc;
++			break;
++		}
++	}
++
++	if (value == -EOPNOTSUPP)
++		VDBG(fsg,
++			"unknown class-specific control req "
++			"%02x.%02x v%04x i%04x l%u\n",
++			ctrl->bRequestType, ctrl->bRequest,
++			ctrl->wValue, ctrl->wIndex, ctrl->wLength);
++	return value;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Ep0 standard request handlers.  These always run in_irq. */
++
++static int standard_setup_req(struct fsg_dev *fsg,
++		const struct usb_ctrlrequest *ctrl)
++{
++	struct usb_request	*req = fsg->ep0req;
++	int			value = -EOPNOTSUPP;
++
++	/* Usually this just stores reply data in the pre-allocated ep0 buffer,
++	 * but config change events will also reconfigure hardware. */
++	switch (ctrl->bRequest) {
++
++	case USB_REQ_GET_DESCRIPTOR:
++		if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
++				USB_RECIP_DEVICE))
++			break;
++		switch (ctrl->wValue >> 8) {
++
++		case USB_DT_DEVICE:
++			VDBG(fsg, "get device descriptor\n");
++			value = min(ctrl->wLength, (u16) sizeof device_desc);
++			memcpy(req->buf, &device_desc, value);
++			break;
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++		case USB_DT_DEVICE_QUALIFIER:
++			VDBG(fsg, "get device qualifier\n");
++			if (!fsg->gadget->is_dualspeed)
++				break;
++			value = min(ctrl->wLength, (u16) sizeof dev_qualifier);
++			memcpy(req->buf, &dev_qualifier, value);
++			break;
++
++		case USB_DT_OTHER_SPEED_CONFIG:
++			VDBG(fsg, "get other-speed config descriptor\n");
++			if (!fsg->gadget->is_dualspeed)
++				break;
++			goto get_config;
++#endif
++		case USB_DT_CONFIG:
++			VDBG(fsg, "get configuration descriptor\n");
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++		get_config:
++#endif
++			value = populate_config_buf(fsg->gadget->speed,
++					req->buf,
++					ctrl->wValue >> 8,
++					ctrl->wValue & 0xff);
++			if (value >= 0)
++				value = min(ctrl->wLength, (u16) value);
++			break;
++
++		case USB_DT_STRING:
++			VDBG(fsg, "get string descriptor\n");
++
++			/* wIndex == language code */
++			value = usb_gadget_get_string(&stringtab,
++					ctrl->wValue & 0xff, req->buf);
++			if (value >= 0)
++				value = min(ctrl->wLength, (u16) value);
++			break;
++		}
++		break;
++
++	/* One config, two speeds */
++	case USB_REQ_SET_CONFIGURATION:
++		if (ctrl->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
++				USB_RECIP_DEVICE))
++			break;
++		VDBG(fsg, "set configuration\n");
++		if (ctrl->wValue == CONFIG_VALUE || ctrl->wValue == 0) {
++			fsg->new_config = ctrl->wValue;
++
++			/* Raise an exception to wipe out previous transaction
++			 * state (queued bufs, etc) and set the new config. */
++			raise_exception(fsg, FSG_STATE_CONFIG_CHANGE);
++			value = DELAYED_STATUS;
++		}
++		break;
++	case USB_REQ_GET_CONFIGURATION:
++		if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
++				USB_RECIP_DEVICE))
++			break;
++		VDBG(fsg, "get configuration\n");
++		*(u8 *) req->buf = fsg->config;
++		value = min(ctrl->wLength, (u16) 1);
++		break;
++
++	case USB_REQ_SET_INTERFACE:
++		if (ctrl->bRequestType != (USB_DIR_OUT| USB_TYPE_STANDARD |
++				USB_RECIP_INTERFACE))
++			break;
++		if (fsg->config && ctrl->wIndex == 0) {
++
++			/* Raise an exception to wipe out previous transaction
++			 * state (queued bufs, etc) and install the new
++			 * interface altsetting. */
++			raise_exception(fsg, FSG_STATE_INTERFACE_CHANGE);
++			value = DELAYED_STATUS;
++		}
++		break;
++	case USB_REQ_GET_INTERFACE:
++		if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
++				USB_RECIP_INTERFACE))
++			break;
++		if (!fsg->config)
++			break;
++		if (ctrl->wIndex != 0) {
++			value = -EDOM;
++			break;
++		}
++		VDBG(fsg, "get interface\n");
++		*(u8 *) req->buf = 0;
++		value = min(ctrl->wLength, (u16) 1);
++		break;
++
++	default:
++		VDBG(fsg,
++			"unknown control req %02x.%02x v%04x i%04x l%u\n",
++			ctrl->bRequestType, ctrl->bRequest,
++			ctrl->wValue, ctrl->wIndex, ctrl->wLength);
++	}
++
++	return value;
++}
++
++
++static int fsg_setup(struct usb_gadget *gadget,
++		const struct usb_ctrlrequest *ctrl)
++{
++	struct fsg_dev		*fsg = get_gadget_data(gadget);
++	int			rc;
++
++	++fsg->ep0_req_tag;		// Record arrival of a new request
++	fsg->ep0req->context = NULL;
++	fsg->ep0req->length = 0;
++	dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl));
++
++	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
++		rc = class_setup_req(fsg, ctrl);
++	else
++		rc = standard_setup_req(fsg, ctrl);
++
++	/* Respond with data/status or defer until later? */
++	if (rc >= 0 && rc != DELAYED_STATUS) {
++		fsg->ep0req->length = rc;
++		fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ?
++				"ep0-in" : "ep0-out");
++		rc = ep0_queue(fsg);
++	}
++
++	/* Device either stalls (rc < 0) or reports success */
++	return rc;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* All the following routines run in process context */
++
++
++/* Use this for bulk or interrupt transfers, not ep0 */
++static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
++		struct usb_request *req, volatile int *pbusy,
++		volatile enum fsg_buffer_state *state)
++{
++	int	rc;
++
++	if (ep == fsg->bulk_in)
++		dump_msg(fsg, "bulk-in", req->buf, req->length);
++	else if (ep == fsg->intr_in)
++		dump_msg(fsg, "intr-in", req->buf, req->length);
++	*pbusy = 1;
++	*state = BUF_STATE_BUSY;
++	rc = usb_ep_queue(ep, req, GFP_KERNEL);
++	if (rc != 0) {
++		*pbusy = 0;
++		*state = BUF_STATE_EMPTY;
++
++		/* We can't do much more than wait for a reset */
++
++		/* Note: currently the net2280 driver fails zero-length
++		 * submissions if DMA is enabled. */
++		if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP &&
++						req->length == 0))
++			WARN(fsg, "error in submission: %s --> %d\n",
++					ep->name, rc);
++	}
++}
++
++
++static int sleep_thread(struct fsg_dev *fsg)
++{
++	int	rc;
++
++	/* Wait until a signal arrives or we are woken up */
++	rc = wait_event_interruptible(fsg->thread_wqh,
++			fsg->thread_wakeup_needed);
++	fsg->thread_wakeup_needed = 0;
++	return (rc ? -EINTR : 0);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int do_read(struct fsg_dev *fsg)
++{
++	struct lun		*curlun = fsg->curlun;
++	u32			lba;
++	struct fsg_buffhd	*bh;
++	int			rc;
++	u32			amount_left;
++	loff_t			file_offset, file_offset_tmp;
++	unsigned int		amount;
++	unsigned int		partial_page;
++	ssize_t			nread;
++
++	/* Get the starting Logical Block Address and check that it's
++	 * not too big */
++	if (fsg->cmnd[0] == SC_READ_6)
++		lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]);
++	else {
++		lba = get_be32(&fsg->cmnd[2]);
++
++		/* We allow DPO (Disable Page Out = don't save data in the
++		 * cache) and FUA (Force Unit Access = don't read from the
++		 * cache), but we don't implement them. */
++		if ((fsg->cmnd[1] & ~0x18) != 0) {
++			curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++			return -EINVAL;
++		}
++	}
++	if (lba >= curlun->num_sectors) {
++		curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
++		return -EINVAL;
++	}
++	file_offset = ((loff_t) lba) << 9;
++
++	/* Carry out the file reads */
++	amount_left = fsg->data_size_from_cmnd;
++	if (unlikely(amount_left == 0))
++		return -EIO;		// No default reply
++
++	for (;;) {
++
++		/* Figure out how much we need to read:
++		 * Try to read the remaining amount.
++		 * But don't read more than the buffer size.
++		 * And don't try to read past the end of the file.
++		 * Finally, if we're not at a page boundary, don't read past
++		 *	the next page.
++		 * If this means reading 0 then we were asked to read past
++		 *	the end of file. */
++		amount = min((unsigned int) amount_left, mod_data.buflen);
++		amount = min((loff_t) amount,
++				curlun->file_length - file_offset);
++		partial_page = file_offset & (PAGE_CACHE_SIZE - 1);
++		if (partial_page > 0)
++			amount = min(amount, (unsigned int) PAGE_CACHE_SIZE -
++					partial_page);
++
++		/* Wait for the next buffer to become available */
++		bh = fsg->next_buffhd_to_fill;
++		while (bh->state != BUF_STATE_EMPTY) {
++			if ((rc = sleep_thread(fsg)) != 0)
++				return rc;
++		}
++
++		/* If we were asked to read past the end of file,
++		 * end with an empty buffer. */
++		if (amount == 0) {
++			curlun->sense_data =
++					SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
++			curlun->sense_data_info = file_offset >> 9;
++			bh->inreq->length = 0;
++			bh->state = BUF_STATE_FULL;
++			break;
++		}
++
++		/* Perform the read */
++		file_offset_tmp = file_offset;
++		nread = curlun->filp->f_op->read(curlun->filp,
++				(char *) bh->buf,
++				amount, &file_offset_tmp);
++		VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
++				(unsigned long long) file_offset,
++				(int) nread);
++		if (signal_pending(current))
++			return -EINTR;
++
++		if (nread < 0) {
++			LDBG(curlun, "error in file read: %d\n",
++					(int) nread);
++			nread = 0;
++		} else if (nread < amount) {
++			LDBG(curlun, "partial file read: %d/%u\n",
++					(int) nread, amount);
++			nread -= (nread & 511);	// Round down to a block
++		}
++		file_offset  += nread;
++		amount_left  -= nread;
++		fsg->residue -= nread;
++		bh->inreq->length = nread;
++		bh->state = BUF_STATE_FULL;
++
++		/* If an error occurred, report it and its position */
++		if (nread < amount) {
++			curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
++			curlun->sense_data_info = file_offset >> 9;
++			break;
++		}
++
++		if (amount_left == 0)
++			break;		// No more left to read
++
++		/* Send this buffer and go read some more */
++		bh->inreq->zero = 0;
++		start_transfer(fsg, fsg->bulk_in, bh->inreq,
++				&bh->inreq_busy, &bh->state);
++		fsg->next_buffhd_to_fill = bh->next;
++	}
++
++	return -EIO;		// No default reply
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int do_write(struct fsg_dev *fsg)
++{
++	struct lun		*curlun = fsg->curlun;
++	u32			lba;
++	struct fsg_buffhd	*bh;
++	int			get_some_more;
++	u32			amount_left_to_req, amount_left_to_write;
++	loff_t			usb_offset, file_offset, file_offset_tmp;
++	unsigned int		amount;
++	unsigned int		partial_page;
++	ssize_t			nwritten;
++	int			rc;
++
++	if (curlun->ro) {
++		curlun->sense_data = SS_WRITE_PROTECTED;
++		return -EINVAL;
++	}
++	curlun->filp->f_flags &= ~O_SYNC;	// Default is not to wait
++
++	/* Get the starting Logical Block Address and check that it's
++	 * not too big */
++	if (fsg->cmnd[0] == SC_WRITE_6)
++		lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]);
++	else {
++		lba = get_be32(&fsg->cmnd[2]);
++
++		/* We allow DPO (Disable Page Out = don't save data in the
++		 * cache) and FUA (Force Unit Access = write directly to the
++		 * medium).  We don't implement DPO; we implement FUA by
++		 * performing synchronous output. */
++		if ((fsg->cmnd[1] & ~0x18) != 0) {
++			curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++			return -EINVAL;
++		}
++		if (fsg->cmnd[1] & 0x08)	// FUA
++			curlun->filp->f_flags |= O_SYNC;
++	}
++	if (lba >= curlun->num_sectors) {
++		curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
++		return -EINVAL;
++	}
++
++	/* Carry out the file writes */
++	get_some_more = 1;
++	file_offset = usb_offset = ((loff_t) lba) << 9;
++	amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd;
++
++	while (amount_left_to_write > 0) {
++
++		/* Queue a request for more data from the host */
++		bh = fsg->next_buffhd_to_fill;
++		if (bh->state == BUF_STATE_EMPTY && get_some_more) {
++
++			/* Figure out how much we want to get:
++			 * Try to get the remaining amount.
++			 * But don't get more than the buffer size.
++			 * And don't try to go past the end of the file.
++			 * If we're not at a page boundary,
++			 *	don't go past the next page.
++			 * If this means getting 0, then we were asked
++			 *	to write past the end of file.
++			 * Finally, round down to a block boundary. */
++			amount = min(amount_left_to_req, mod_data.buflen);
++			amount = min((loff_t) amount, curlun->file_length -
++					usb_offset);
++			partial_page = usb_offset & (PAGE_CACHE_SIZE - 1);
++			if (partial_page > 0)
++				amount = min(amount,
++	(unsigned int) PAGE_CACHE_SIZE - partial_page);
++
++			if (amount == 0) {
++				get_some_more = 0;
++				curlun->sense_data =
++					SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
++				curlun->sense_data_info = usb_offset >> 9;
++				continue;
++			}
++			amount -= (amount & 511);
++			if (amount == 0) {
++
++				/* Why were we were asked to transfer a
++				 * partial block? */
++				get_some_more = 0;
++				continue;
++			}
++
++			/* Get the next buffer */
++			usb_offset += amount;
++			fsg->usb_amount_left -= amount;
++			amount_left_to_req -= amount;
++			if (amount_left_to_req == 0)
++				get_some_more = 0;
++
++			/* amount is always divisible by 512, hence by
++			 * the bulk-out maxpacket size */
++			bh->outreq->length = bh->bulk_out_intended_length =
++					amount;
++			start_transfer(fsg, fsg->bulk_out, bh->outreq,
++					&bh->outreq_busy, &bh->state);
++			fsg->next_buffhd_to_fill = bh->next;
++			continue;
++		}
++
++		/* Write the received data to the backing file */
++		bh = fsg->next_buffhd_to_drain;
++		if (bh->state == BUF_STATE_EMPTY && !get_some_more)
++			break;			// We stopped early
++		if (bh->state == BUF_STATE_FULL) {
++			fsg->next_buffhd_to_drain = bh->next;
++			bh->state = BUF_STATE_EMPTY;
++
++			/* Did something go wrong with the transfer? */
++			if (bh->outreq->status != 0) {
++				curlun->sense_data = SS_COMMUNICATION_FAILURE;
++				curlun->sense_data_info = file_offset >> 9;
++				break;
++			}
++
++			amount = bh->outreq->actual;
++			if (curlun->file_length - file_offset < amount) {
++				LERROR(curlun,
++	"write %u @ %llu beyond end %llu\n",
++	amount, (unsigned long long) file_offset,
++	(unsigned long long) curlun->file_length);
++				amount = curlun->file_length - file_offset;
++			}
++
++			/* Perform the write */
++			file_offset_tmp = file_offset;
++			nwritten = curlun->filp->f_op->write(curlun->filp,
++					(char *) bh->buf,
++					amount, &file_offset_tmp);
++			VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
++					(unsigned long long) file_offset,
++					(int) nwritten);
++			if (signal_pending(current))
++				return -EINTR;		// Interrupted!
++
++			if (nwritten < 0) {
++				LDBG(curlun, "error in file write: %d\n",
++						(int) nwritten);
++				nwritten = 0;
++			} else if (nwritten < amount) {
++				LDBG(curlun, "partial file write: %d/%u\n",
++						(int) nwritten, amount);
++				nwritten -= (nwritten & 511);
++						// Round down to a block
++			}
++			file_offset += nwritten;
++			amount_left_to_write -= nwritten;
++			fsg->residue -= nwritten;
++
++			/* If an error occurred, report it and its position */
++			if (nwritten < amount) {
++				curlun->sense_data = SS_WRITE_ERROR;
++				curlun->sense_data_info = file_offset >> 9;
++				break;
++			}
++
++			/* Did the host decide to stop early? */
++			if (bh->outreq->actual != bh->outreq->length) {
++				fsg->short_packet_received = 1;
++				break;
++			}
++			continue;
++		}
++
++		/* Wait for something to happen */
++		if ((rc = sleep_thread(fsg)) != 0)
++			return rc;
++	}
++
++	return -EIO;		// No default reply
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Sync the file data, don't bother with the metadata.
++ * This code was copied from fs/buffer.c:sys_fdatasync(). */
++static int fsync_sub(struct lun *curlun)
++{
++	struct file	*filp = curlun->filp;
++	struct inode	*inode;
++	int		rc, err;
++
++	if (curlun->ro || !filp)
++		return 0;
++	if (!filp->f_op->fsync)
++		return -EINVAL;
++
++	inode = filp->f_dentry->d_inode;
++	down(&inode->i_sem);
++	rc = filemap_fdatasync(inode->i_mapping);
++	err = filp->f_op->fsync(filp, filp->f_dentry, 1);
++	if (!rc)
++		rc = err;
++	err = filemap_fdatawait(inode->i_mapping);
++	if (!rc)
++		rc = err;
++	up(&inode->i_sem);
++	VLDBG(curlun, "fdatasync -> %d\n", rc);
++	return rc;
++}
++
++static void fsync_all(struct fsg_dev *fsg)
++{
++	int	i;
++
++	for (i = 0; i < fsg->nluns; ++i)
++		fsync_sub(&fsg->luns[i]);
++}
++
++static int do_synchronize_cache(struct fsg_dev *fsg)
++{
++	struct lun	*curlun = fsg->curlun;
++	int		rc;
++
++	/* We ignore the requested LBA and write out all file's
++	 * dirty data buffers. */
++	rc = fsync_sub(curlun);
++	if (rc)
++		curlun->sense_data = SS_WRITE_ERROR;
++	return 0;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static void invalidate_sub(struct lun *curlun)
++{
++	struct file	*filp = curlun->filp;
++	struct inode	*inode = filp->f_dentry->d_inode;
++
++	invalidate_inode_pages(inode);
++}
++
++static int do_verify(struct fsg_dev *fsg)
++{
++	struct lun		*curlun = fsg->curlun;
++	u32			lba;
++	u32			verification_length;
++	struct fsg_buffhd	*bh = fsg->next_buffhd_to_fill;
++	loff_t			file_offset, file_offset_tmp;
++	u32			amount_left;
++	unsigned int		amount;
++	ssize_t			nread;
++
++	/* Get the starting Logical Block Address and check that it's
++	 * not too big */
++	lba = get_be32(&fsg->cmnd[2]);
++	if (lba >= curlun->num_sectors) {
++		curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
++		return -EINVAL;
++	}
++
++	/* We allow DPO (Disable Page Out = don't save data in the
++	 * cache) but we don't implement it. */
++	if ((fsg->cmnd[1] & ~0x10) != 0) {
++		curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++		return -EINVAL;
++	}
++
++	verification_length = get_be16(&fsg->cmnd[7]);
++	if (unlikely(verification_length == 0))
++		return -EIO;		// No default reply
++
++	/* Prepare to carry out the file verify */
++	amount_left = verification_length << 9;
++	file_offset = ((loff_t) lba) << 9;
++
++	/* Write out all the dirty buffers before invalidating them */
++	fsync_sub(curlun);
++	if (signal_pending(current))
++		return -EINTR;
++
++	invalidate_sub(curlun);
++	if (signal_pending(current))
++		return -EINTR;
++
++	/* Just try to read the requested blocks */
++	while (amount_left > 0) {
++
++		/* Figure out how much we need to read:
++		 * Try to read the remaining amount, but not more than
++		 * the buffer size.
++		 * And don't try to read past the end of the file.
++		 * If this means reading 0 then we were asked to read
++		 * past the end of file. */
++		amount = min((unsigned int) amount_left, mod_data.buflen);
++		amount = min((loff_t) amount,
++				curlun->file_length - file_offset);
++		if (amount == 0) {
++			curlun->sense_data =
++					SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
++			curlun->sense_data_info = file_offset >> 9;
++			break;
++		}
++
++		/* Perform the read */
++		file_offset_tmp = file_offset;
++		nread = curlun->filp->f_op->read(curlun->filp,
++				(char *) bh->buf,
++				amount, &file_offset_tmp);
++		VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
++				(unsigned long long) file_offset,
++				(int) nread);
++		if (signal_pending(current))
++			return -EINTR;
++
++		if (nread < 0) {
++			LDBG(curlun, "error in file verify: %d\n",
++					(int) nread);
++			nread = 0;
++		} else if (nread < amount) {
++			LDBG(curlun, "partial file verify: %d/%u\n",
++					(int) nread, amount);
++			nread -= (nread & 511);	// Round down to a sector
++		}
++		if (nread == 0) {
++			curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
++			curlun->sense_data_info = file_offset >> 9;
++			break;
++		}
++		file_offset += nread;
++		amount_left -= nread;
++	}
++	return 0;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh)
++{
++	u8	*buf = (u8 *) bh->buf;
++
++	static char vendor_id[] = "Linux   ";
++	static char product_id[] = "File-Stor Gadget";
++
++	if (!fsg->curlun) {		// Unsupported LUNs are okay
++		fsg->bad_lun_okay = 1;
++		memset(buf, 0, 36);
++		buf[0] = 0x7f;		// Unsupported, no device-type
++		return 36;
++	}
++
++	memset(buf, 0, 8);	// Non-removable, direct-access device
++	if (mod_data.removable)
++		buf[1] = 0x80;
++	buf[2] = 2;		// ANSI SCSI level 2
++	buf[3] = 2;		// SCSI-2 INQUIRY data format
++	buf[4] = 31;		// Additional length
++				// No special options
++	sprintf(buf + 8, "%-8s%-16s%04x", vendor_id, product_id,
++			mod_data.release);
++	return 36;
++}
++
++
++static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
++{
++	struct lun	*curlun = fsg->curlun;
++	u8		*buf = (u8 *) bh->buf;
++	u32		sd, sdinfo;
++
++	/*
++	 * From the SCSI-2 spec., section 7.9 (Unit attention condition):
++	 *
++	 * If a REQUEST SENSE command is received from an initiator
++	 * with a pending unit attention condition (before the target
++	 * generates the contingent allegiance condition), then the
++	 * target shall either:
++	 *   a) report any pending sense data and preserve the unit
++	 *	attention condition on the logical unit, or,
++	 *   b) report the unit attention condition, may discard any
++	 *	pending sense data, and clear the unit attention
++	 *	condition on the logical unit for that initiator.
++	 *
++	 * FSG normally uses option a); enable this code to use option b).
++	 */
++#if 0
++	if (curlun && curlun->unit_attention_data != SS_NO_SENSE) {
++		curlun->sense_data = curlun->unit_attention_data;
++		curlun->unit_attention_data = SS_NO_SENSE;
++	}
++#endif
++
++	if (!curlun) {		// Unsupported LUNs are okay
++		fsg->bad_lun_okay = 1;
++		sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
++		sdinfo = 0;
++	} else {
++		sd = curlun->sense_data;
++		sdinfo = curlun->sense_data_info;
++		curlun->sense_data = SS_NO_SENSE;
++		curlun->sense_data_info = 0;
++	}
++
++	memset(buf, 0, 18);
++	buf[0] = 0x80 | 0x70;			// Valid, current error
++	buf[2] = SK(sd);
++	put_be32(&buf[3], sdinfo);		// Sense information
++	buf[7] = 18 - 8;			// Additional sense length
++	buf[12] = ASC(sd);
++	buf[13] = ASCQ(sd);
++	return 18;
++}
++
++
++static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
++{
++	struct lun	*curlun = fsg->curlun;
++	u32		lba = get_be32(&fsg->cmnd[2]);
++	int		pmi = fsg->cmnd[8];
++	u8		*buf = (u8 *) bh->buf;
++
++	/* Check the PMI and LBA fields */
++	if (pmi > 1 || (pmi == 0 && lba != 0)) {
++		curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++		return -EINVAL;
++	}
++
++	put_be32(&buf[0], curlun->num_sectors - 1);	// Max logical block
++	put_be32(&buf[4], 512);				// Block length
++	return 8;
++}
++
++
++static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
++{
++	struct lun	*curlun = fsg->curlun;
++	int		mscmnd = fsg->cmnd[0];
++	u8		*buf = (u8 *) bh->buf;
++	u8		*buf0 = buf;
++	int		pc, page_code;
++	int		changeable_values, all_pages;
++	int		valid_page = 0;
++	int		len, limit;
++
++	if ((fsg->cmnd[1] & ~0x08) != 0) {		// Mask away DBD
++		curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++		return -EINVAL;
++	}
++	pc = fsg->cmnd[2] >> 6;
++	page_code = fsg->cmnd[2] & 0x3f;
++	if (pc == 3) {
++		curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
++		return -EINVAL;
++	}
++	changeable_values = (pc == 1);
++	all_pages = (page_code == 0x3f);
++
++	/* Write the mode parameter header.  Fixed values are: default
++	 * medium type, no cache control (DPOFUA), and no block descriptors.
++	 * The only variable value is the WriteProtect bit.  We will fill in
++	 * the mode data length later. */
++	memset(buf, 0, 8);
++	if (mscmnd == SC_MODE_SENSE_6) {
++		buf[2] = (curlun->ro ? 0x80 : 0x00);		// WP, DPOFUA
++		buf += 4;
++		limit = 255;
++	} else {			// SC_MODE_SENSE_10
++		buf[3] = (curlun->ro ? 0x80 : 0x00);		// WP, DPOFUA
++		buf += 8;
++		limit = 65535;		// Should really be mod_data.buflen
++	}
++
++	/* No block descriptors */
++
++	/* The mode pages, in numerical order.  The only page we support
++	 * is the Caching page. */
++	if (page_code == 0x08 || all_pages) {
++		valid_page = 1;
++		buf[0] = 0x08;		// Page code
++		buf[1] = 10;		// Page length
++		memset(buf+2, 0, 10);	// None of the fields are changeable
++
++		if (!changeable_values) {
++			buf[2] = 0x04;	// Write cache enable,
++					// Read cache not disabled
++					// No cache retention priorities
++			put_be16(&buf[4], 0xffff);  // Don't disable prefetch
++					// Minimum prefetch = 0
++			put_be16(&buf[8], 0xffff);  // Maximum prefetch
++			put_be16(&buf[10], 0xffff); // Maximum prefetch ceiling
++		}
++		buf += 12;
++	}
++
++	/* Check that a valid page was requested and the mode data length
++	 * isn't too long. */
++	len = buf - buf0;
++	if (!valid_page || len > limit) {
++		curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++		return -EINVAL;
++	}
++
++	/*  Store the mode data length */
++	if (mscmnd == SC_MODE_SENSE_6)
++		buf0[0] = len - 1;
++	else
++		put_be16(buf0, len - 2);
++	return len;
++}
++
++
++static int do_start_stop(struct fsg_dev *fsg)
++{
++	struct lun	*curlun = fsg->curlun;
++	int		loej, start;
++
++	if (!mod_data.removable) {
++		curlun->sense_data = SS_INVALID_COMMAND;
++		return -EINVAL;
++	}
++
++	// int immed = fsg->cmnd[1] & 0x01;
++	loej = fsg->cmnd[4] & 0x02;
++	start = fsg->cmnd[4] & 0x01;
++
++#ifdef CONFIG_USB_FILE_STORAGE_TEST
++	if ((fsg->cmnd[1] & ~0x01) != 0 ||		// Mask away Immed
++			(fsg->cmnd[4] & ~0x03) != 0) {	// Mask LoEj, Start
++		curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++		return -EINVAL;
++	}
++
++	if (!start) {
++
++		/* Are we allowed to unload the media? */
++		if (curlun->prevent_medium_removal) {
++			LDBG(curlun, "unload attempt prevented\n");
++			curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED;
++			return -EINVAL;
++		}
++		if (loej) {		// Simulate an unload/eject
++			up_read(&fsg->filesem);
++			down_write(&fsg->filesem);
++			close_backing_file(curlun);
++			up_write(&fsg->filesem);
++			down_read(&fsg->filesem);
++		}
++	} else {
++
++		/* Our emulation doesn't support mounting; the medium is
++		 * available for use as soon as it is loaded. */
++		if (!backing_file_is_open(curlun)) {
++			curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
++			return -EINVAL;
++		}
++	}
++#endif
++	return 0;
++}
++
++
++static int do_prevent_allow(struct fsg_dev *fsg)
++{
++	struct lun	*curlun = fsg->curlun;
++	int		prevent;
++
++	if (!mod_data.removable) {
++		curlun->sense_data = SS_INVALID_COMMAND;
++		return -EINVAL;
++	}
++
++	prevent = fsg->cmnd[4] & 0x01;
++	if ((fsg->cmnd[4] & ~0x01) != 0) {		// Mask away Prevent
++		curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++		return -EINVAL;
++	}
++
++	if (curlun->prevent_medium_removal && !prevent)
++		fsync_sub(curlun);
++	curlun->prevent_medium_removal = prevent;
++	return 0;
++}
++
++
++static int do_read_format_capacities(struct fsg_dev *fsg,
++			struct fsg_buffhd *bh)
++{
++	struct lun	*curlun = fsg->curlun;
++	u8		*buf = (u8 *) bh->buf;
++
++	buf[0] = buf[1] = buf[2] = 0;
++	buf[3] = 8;		// Only the Current/Maximum Capacity Descriptor
++	buf += 4;
++
++	put_be32(&buf[0], curlun->num_sectors);		// Number of blocks
++	put_be32(&buf[4], 512);				// Block length
++	buf[4] = 0x02;					// Current capacity
++	return 12;
++}
++
++
++static int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh)
++{
++	struct lun	*curlun = fsg->curlun;
++
++	/* We don't support MODE SELECT */
++	curlun->sense_data = SS_INVALID_COMMAND;
++	return -EINVAL;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int halt_bulk_in_endpoint(struct fsg_dev *fsg)
++{
++	int	rc;
++
++	rc = fsg_set_halt(fsg, fsg->bulk_in);
++	if (rc == -EAGAIN)
++		VDBG(fsg, "delayed bulk-in endpoint halt\n");
++	while (rc != 0) {
++		if (rc != -EAGAIN) {
++			WARN(fsg, "usb_ep_set_halt -> %d\n", rc);
++			rc = 0;
++			break;
++		}
++
++		/* Wait for a short time and then try again */
++		set_current_state(TASK_INTERRUPTIBLE);
++		if (schedule_timeout(HZ / 10) != 0)
++			return -EINTR;
++		rc = usb_ep_set_halt(fsg->bulk_in);
++	}
++	return rc;
++}
++
++static int pad_with_zeros(struct fsg_dev *fsg)
++{
++	struct fsg_buffhd	*bh = fsg->next_buffhd_to_fill;
++	u32			nkeep = bh->inreq->length;
++	u32			nsend;
++	int			rc;
++
++	bh->state = BUF_STATE_EMPTY;		// For the first iteration
++	fsg->usb_amount_left = nkeep + fsg->residue;
++	while (fsg->usb_amount_left > 0) {
++
++		/* Wait for the next buffer to be free */
++		while (bh->state != BUF_STATE_EMPTY) {
++			if ((rc = sleep_thread(fsg)) != 0)
++				return rc;
++		}
++
++		nsend = min(fsg->usb_amount_left, (u32) mod_data.buflen);
++		memset(bh->buf + nkeep, 0, nsend - nkeep);
++		bh->inreq->length = nsend;
++		bh->inreq->zero = 0;
++		start_transfer(fsg, fsg->bulk_in, bh->inreq,
++				&bh->inreq_busy, &bh->state);
++		bh = fsg->next_buffhd_to_fill = bh->next;
++		fsg->usb_amount_left -= nsend;
++		nkeep = 0;
++	}
++	return 0;
++}
++
++static int throw_away_data(struct fsg_dev *fsg)
++{
++	struct fsg_buffhd	*bh;
++	u32			amount;
++	int			rc;
++
++	while ((bh = fsg->next_buffhd_to_drain)->state != BUF_STATE_EMPTY ||
++			fsg->usb_amount_left > 0) {
++
++		/* Throw away the data in a filled buffer */
++		if (bh->state == BUF_STATE_FULL) {
++			bh->state = BUF_STATE_EMPTY;
++			fsg->next_buffhd_to_drain = bh->next;
++
++			/* A short packet or an error ends everything */
++			if (bh->outreq->actual != bh->outreq->length ||
++					bh->outreq->status != 0) {
++				raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
++				return -EINTR;
++			}
++			continue;
++		}
++
++		/* Try to submit another request if we need one */
++		bh = fsg->next_buffhd_to_fill;
++		if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) {
++			amount = min(fsg->usb_amount_left,
++					(u32) mod_data.buflen);
++
++			/* amount is always divisible by 512, hence by
++			 * the bulk-out maxpacket size */
++			bh->outreq->length = bh->bulk_out_intended_length =
++					amount;
++			start_transfer(fsg, fsg->bulk_out, bh->outreq,
++					&bh->outreq_busy, &bh->state);
++			fsg->next_buffhd_to_fill = bh->next;
++			fsg->usb_amount_left -= amount;
++			continue;
++		}
++
++		/* Otherwise wait for something to happen */
++		if ((rc = sleep_thread(fsg)) != 0)
++			return rc;
++	}
++	return 0;
++}
++
++
++static int finish_reply(struct fsg_dev *fsg)
++{
++	struct fsg_buffhd	*bh = fsg->next_buffhd_to_fill;
++	int			rc = 0;
++
++	switch (fsg->data_dir) {
++	case DATA_DIR_NONE:
++		break;			// Nothing to send
++
++	/* If we don't know whether the host wants to read or write,
++	 * this must be CB or CBI with an unknown command.  We mustn't
++	 * try to send or receive any data.  So stall both bulk pipes
++	 * if we can and wait for a reset. */
++	case DATA_DIR_UNKNOWN:
++		if (mod_data.can_stall) {
++			fsg_set_halt(fsg, fsg->bulk_out);
++			rc = halt_bulk_in_endpoint(fsg);
++		}
++		break;
++
++	/* All but the last buffer of data must have already been sent */
++	case DATA_DIR_TO_HOST:
++		if (fsg->data_size == 0)
++			;		// Nothing to send
++
++		/* If there's no residue, simply send the last buffer */
++		else if (fsg->residue == 0) {
++			bh->inreq->zero = 0;
++			start_transfer(fsg, fsg->bulk_in, bh->inreq,
++					&bh->inreq_busy, &bh->state);
++			fsg->next_buffhd_to_fill = bh->next;
++		}
++
++		/* There is a residue.  For CB and CBI, simply mark the end
++		 * of the data with a short packet.  However, if we are
++		 * allowed to stall, there was no data at all (residue ==
++		 * data_size), and the command failed (invalid LUN or
++		 * sense data is set), then halt the bulk-in endpoint
++		 * instead. */
++		else if (!transport_is_bbb()) {
++			if (mod_data.can_stall &&
++					fsg->residue == fsg->data_size &&
++	(!fsg->curlun || fsg->curlun->sense_data != SS_NO_SENSE)) {
++				bh->state = BUF_STATE_EMPTY;
++				rc = halt_bulk_in_endpoint(fsg);
++			} else {
++				bh->inreq->zero = 1;
++				start_transfer(fsg, fsg->bulk_in, bh->inreq,
++						&bh->inreq_busy, &bh->state);
++				fsg->next_buffhd_to_fill = bh->next;
++			}
++		}
++
++		/* For Bulk-only, if we're allowed to stall then send the
++		 * short packet and halt the bulk-in endpoint.  If we can't
++		 * stall, pad out the remaining data with 0's. */
++		else {
++			if (mod_data.can_stall) {
++				bh->inreq->zero = 1;
++				start_transfer(fsg, fsg->bulk_in, bh->inreq,
++						&bh->inreq_busy, &bh->state);
++				fsg->next_buffhd_to_fill = bh->next;
++				rc = halt_bulk_in_endpoint(fsg);
++			} else
++				rc = pad_with_zeros(fsg);
++		}
++		break;
++
++	/* We have processed all we want from the data the host has sent.
++	 * There may still be outstanding bulk-out requests. */
++	case DATA_DIR_FROM_HOST:
++		if (fsg->residue == 0)
++			;		// Nothing to receive
++
++		/* Did the host stop sending unexpectedly early? */
++		else if (fsg->short_packet_received) {
++			raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
++			rc = -EINTR;
++		}
++
++		/* We haven't processed all the incoming data.  If we are
++		 * allowed to stall, halt the bulk-out endpoint and cancel
++		 * any outstanding requests. */
++		else if (mod_data.can_stall) {
++			fsg_set_halt(fsg, fsg->bulk_out);
++			raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
++			rc = -EINTR;
++		}
++
++		/* We can't stall.  Read in the excess data and throw it
++		 * all away. */
++		else
++			rc = throw_away_data(fsg);
++		break;
++	}
++	return rc;
++}
++
++
++static int send_status(struct fsg_dev *fsg)
++{
++	struct lun		*curlun = fsg->curlun;
++	struct fsg_buffhd	*bh;
++	int			rc;
++	u8			status = USB_STATUS_PASS;
++	u32			sd, sdinfo = 0;
++
++	/* Wait for the next buffer to become available */
++	bh = fsg->next_buffhd_to_fill;
++	while (bh->state != BUF_STATE_EMPTY) {
++		if ((rc = sleep_thread(fsg)) != 0)
++			return rc;
++	}
++
++	if (curlun) {
++		sd = curlun->sense_data;
++		sdinfo = curlun->sense_data_info;
++	} else if (fsg->bad_lun_okay)
++		sd = SS_NO_SENSE;
++	else
++		sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
++
++	if (fsg->phase_error) {
++		DBG(fsg, "sending phase-error status\n");
++		status = USB_STATUS_PHASE_ERROR;
++		sd = SS_INVALID_COMMAND;
++	} else if (sd != SS_NO_SENSE) {
++		DBG(fsg, "sending command-failure status\n");
++		status = USB_STATUS_FAIL;
++		VDBG(fsg, "  sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
++				"  info x%x\n",
++				SK(sd), ASC(sd), ASCQ(sd), sdinfo);
++	}
++
++	if (transport_is_bbb()) {
++		struct bulk_cs_wrap	*csw = (struct bulk_cs_wrap *) bh->buf;
++
++		/* Store and send the Bulk-only CSW */
++		csw->Signature = __constant_cpu_to_le32(USB_BULK_CS_SIG);
++		csw->Tag = fsg->tag;
++		csw->Residue = cpu_to_le32(fsg->residue);
++		csw->Status = status;
++
++		bh->inreq->length = USB_BULK_CS_WRAP_LEN;
++		bh->inreq->zero = 0;
++		start_transfer(fsg, fsg->bulk_in, bh->inreq,
++				&bh->inreq_busy, &bh->state);
++
++	} else if (mod_data.transport_type == USB_PR_CB) {
++
++		/* Control-Bulk transport has no status stage! */
++		return 0;
++
++	} else {			// USB_PR_CBI
++		struct interrupt_data	*buf = (struct interrupt_data *)
++						bh->buf;
++
++		/* Store and send the Interrupt data.  UFI sends the ASC
++		 * and ASCQ bytes.  Everything else sends a Type (which
++		 * is always 0) and the status Value. */
++		if (mod_data.protocol_type == USB_SC_UFI) {
++			buf->bType = ASC(sd);
++			buf->bValue = ASCQ(sd);
++		} else {
++			buf->bType = 0;
++			buf->bValue = status;
++		}
++		fsg->intreq->length = CBI_INTERRUPT_DATA_LEN;
++
++		fsg->intr_buffhd = bh;		// Point to the right buffhd
++		fsg->intreq->buf = bh->inreq->buf;
++		fsg->intreq->dma = bh->inreq->dma;
++		fsg->intreq->context = bh;
++		start_transfer(fsg, fsg->intr_in, fsg->intreq,
++				&fsg->intreq_busy, &bh->state);
++	}
++
++	fsg->next_buffhd_to_fill = bh->next;
++	return 0;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* Check whether the command is properly formed and whether its data size
++ * and direction agree with the values we already have. */
++static int check_command(struct fsg_dev *fsg, int cmnd_size,
++		enum data_direction data_dir, unsigned int mask,
++		int needs_medium, const char *name)
++{
++	int			i;
++	int			lun = fsg->cmnd[1] >> 5;
++	static const char	dirletter[4] = {'u', 'o', 'i', 'n'};
++	char			hdlen[20];
++	struct lun		*curlun;
++
++	/* Adjust the expected cmnd_size for protocol encapsulation padding.
++	 * Transparent SCSI doesn't pad. */
++	if (protocol_is_scsi())
++		;
++
++	/* There's some disagreement as to whether RBC pads commands or not.
++	 * We'll play it safe and accept either form. */
++	else if (mod_data.protocol_type == USB_SC_RBC) {
++		if (fsg->cmnd_size == 12)
++			cmnd_size = 12;
++
++	/* All the other protocols pad to 12 bytes */
++	} else
++		cmnd_size = 12;
++
++	hdlen[0] = 0;
++	if (fsg->data_dir != DATA_DIR_UNKNOWN)
++		sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir],
++				fsg->data_size);
++	VDBG(fsg, "SCSI command: %s;  Dc=%d, D%c=%u;  Hc=%d%s\n",
++			name, cmnd_size, dirletter[(int) data_dir],
++			fsg->data_size_from_cmnd, fsg->cmnd_size, hdlen);
++
++	/* We can't reply at all until we know the correct data direction
++	 * and size. */
++	if (fsg->data_size_from_cmnd == 0)
++		data_dir = DATA_DIR_NONE;
++	if (fsg->data_dir == DATA_DIR_UNKNOWN) {	// CB or CBI
++		fsg->data_dir = data_dir;
++		fsg->data_size = fsg->data_size_from_cmnd;
++
++	} else {					// Bulk-only
++		if (fsg->data_size < fsg->data_size_from_cmnd) {
++
++			/* Host data size < Device data size is a phase error.
++			 * Carry out the command, but only transfer as much
++			 * as we are allowed. */
++			fsg->data_size_from_cmnd = fsg->data_size;
++			fsg->phase_error = 1;
++		}
++	}
++	fsg->residue = fsg->usb_amount_left = fsg->data_size;
++
++	/* Conflicting data directions is a phase error */
++	if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0)
++		goto phase_error;
++
++	/* Verify the length of the command itself */
++	if (cmnd_size != fsg->cmnd_size) {
++
++		/* Special case workaround: MS-Windows issues REQUEST SENSE
++		 * with cbw->Length == 12 (it should be 6). */
++		if (fsg->cmnd[0] == SC_REQUEST_SENSE && fsg->cmnd_size == 12)
++			cmnd_size = fsg->cmnd_size;
++		else
++			goto phase_error;
++	}
++
++	/* Check that the LUN values are oonsistent */
++	if (transport_is_bbb()) {
++		if (fsg->lun != lun)
++			DBG(fsg, "using LUN %d from CBW, "
++					"not LUN %d from CDB\n",
++					fsg->lun, lun);
++	} else
++		fsg->lun = lun;		// Use LUN from the command
++
++	/* Check the LUN */
++	if (fsg->lun >= 0 && fsg->lun < fsg->nluns) {
++		fsg->curlun = curlun = &fsg->luns[fsg->lun];
++		if (fsg->cmnd[0] != SC_REQUEST_SENSE) {
++			curlun->sense_data = SS_NO_SENSE;
++			curlun->sense_data_info = 0;
++		}
++	} else {
++		fsg->curlun = curlun = NULL;
++		fsg->bad_lun_okay = 0;
++
++		/* INQUIRY and REQUEST SENSE commands are explicitly allowed
++		 * to use unsupported LUNs; all others may not. */
++		if (fsg->cmnd[0] != SC_INQUIRY &&
++				fsg->cmnd[0] != SC_REQUEST_SENSE) {
++			DBG(fsg, "unsupported LUN %d\n", fsg->lun);
++			return -EINVAL;
++		}
++	}
++
++	/* If a unit attention condition exists, only INQUIRY and
++	 * REQUEST SENSE commands are allowed; anything else must fail. */
++	if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
++			fsg->cmnd[0] != SC_INQUIRY &&
++			fsg->cmnd[0] != SC_REQUEST_SENSE) {
++		curlun->sense_data = curlun->unit_attention_data;
++		curlun->unit_attention_data = SS_NO_SENSE;
++		return -EINVAL;
++	}
++
++	/* Check that only command bytes listed in the mask are non-zero */
++	fsg->cmnd[1] &= 0x1f;			// Mask away the LUN
++	for (i = 1; i < cmnd_size; ++i) {
++		if (fsg->cmnd[i] && !(mask & (1 << i))) {
++			if (curlun)
++				curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
++			return -EINVAL;
++		}
++	}
++
++	/* If the medium isn't mounted and the command needs to access
++	 * it, return an error. */
++	if (curlun && !backing_file_is_open(curlun) && needs_medium) {
++		curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
++		return -EINVAL;
++	}
++
++	return 0;
++
++phase_error:
++	fsg->phase_error = 1;
++	return -EINVAL;
++}
++
++
++static int do_scsi_command(struct fsg_dev *fsg)
++{
++	struct fsg_buffhd	*bh;
++	int			rc;
++	int			reply = -EINVAL;
++	int			i;
++	static char		unknown[16];
++
++	dump_cdb(fsg);
++
++	/* Wait for the next buffer to become available for data or status */
++	bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill;
++	while (bh->state != BUF_STATE_EMPTY) {
++		if ((rc = sleep_thread(fsg)) != 0)
++			return rc;
++		}
++	fsg->phase_error = 0;
++	fsg->short_packet_received = 0;
++
++	down_read(&fsg->filesem);	// We're using the backing file
++	switch (fsg->cmnd[0]) {
++
++	case SC_INQUIRY:
++		fsg->data_size_from_cmnd = fsg->cmnd[4];
++		if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
++				(1<<4), 0,
++				"INQUIRY")) == 0)
++			reply = do_inquiry(fsg, bh);
++		break;
++
++	case SC_MODE_SELECT_6:
++		fsg->data_size_from_cmnd = fsg->cmnd[4];
++		if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
++				(1<<1) | (1<<4), 0,
++				"MODE SELECT(6)")) == 0)
++			reply = do_mode_select(fsg, bh);
++		break;
++
++	case SC_MODE_SELECT_10:
++		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
++		if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
++				(1<<1) | (3<<7), 0,
++				"MODE SELECT(10)")) == 0)
++			reply = do_mode_select(fsg, bh);
++		break;
++
++	case SC_MODE_SENSE_6:
++		fsg->data_size_from_cmnd = fsg->cmnd[4];
++		if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
++				(1<<1) | (1<<2) | (1<<4), 0,
++				"MODE SENSE(6)")) == 0)
++			reply = do_mode_sense(fsg, bh);
++		break;
++
++	case SC_MODE_SENSE_10:
++		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
++		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
++				(1<<1) | (1<<2) | (3<<7), 0,
++				"MODE SENSE(10)")) == 0)
++			reply = do_mode_sense(fsg, bh);
++		break;
++
++	case SC_PREVENT_ALLOW_MEDIUM_REMOVAL:
++		fsg->data_size_from_cmnd = 0;
++		if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
++				(1<<4), 0,
++				"PREVENT-ALLOW MEDIUM REMOVAL")) == 0)
++			reply = do_prevent_allow(fsg);
++		break;
++
++	case SC_READ_6:
++		i = fsg->cmnd[4];
++		fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
++		if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
++				(7<<1) | (1<<4), 1,
++				"READ(6)")) == 0)
++			reply = do_read(fsg);
++		break;
++
++	case SC_READ_10:
++		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9;
++		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
++				(1<<1) | (0xf<<2) | (3<<7), 1,
++				"READ(10)")) == 0)
++			reply = do_read(fsg);
++		break;
++
++	case SC_READ_12:
++		fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9;
++		if ((reply = check_command(fsg, 12, DATA_DIR_TO_HOST,
++				(1<<1) | (0xf<<2) | (0xf<<6), 1,
++				"READ(12)")) == 0)
++			reply = do_read(fsg);
++		break;
++
++	case SC_READ_CAPACITY:
++		fsg->data_size_from_cmnd = 8;
++		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
++				(0xf<<2) | (1<<8), 1,
++				"READ CAPACITY")) == 0)
++			reply = do_read_capacity(fsg, bh);
++		break;
++
++	case SC_READ_FORMAT_CAPACITIES:
++		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
++		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
++				(3<<7), 1,
++				"READ FORMAT CAPACITIES")) == 0)
++			reply = do_read_format_capacities(fsg, bh);
++		break;
++
++	case SC_REQUEST_SENSE:
++		fsg->data_size_from_cmnd = fsg->cmnd[4];
++		if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
++				(1<<4), 0,
++				"REQUEST SENSE")) == 0)
++			reply = do_request_sense(fsg, bh);
++		break;
++
++	case SC_START_STOP_UNIT:
++		fsg->data_size_from_cmnd = 0;
++		if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
++				(1<<1) | (1<<4), 0,
++				"START-STOP UNIT")) == 0)
++			reply = do_start_stop(fsg);
++		break;
++
++	case SC_SYNCHRONIZE_CACHE:
++		fsg->data_size_from_cmnd = 0;
++		if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
++				(0xf<<2) | (3<<7), 1,
++				"SYNCHRONIZE CACHE")) == 0)
++			reply = do_synchronize_cache(fsg);
++		break;
++
++	case SC_TEST_UNIT_READY:
++		fsg->data_size_from_cmnd = 0;
++		reply = check_command(fsg, 6, DATA_DIR_NONE,
++				0, 1,
++				"TEST UNIT READY");
++		break;
++
++	/* Although optional, this command is used by MS-Windows.  We
++	 * support a minimal version: BytChk must be 0. */
++	case SC_VERIFY:
++		fsg->data_size_from_cmnd = 0;
++		if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
++				(1<<1) | (0xf<<2) | (3<<7), 1,
++				"VERIFY")) == 0)
++			reply = do_verify(fsg);
++		break;
++
++	case SC_WRITE_6:
++		i = fsg->cmnd[4];
++		fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
++		if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
++				(7<<1) | (1<<4), 1,
++				"WRITE(6)")) == 0)
++			reply = do_write(fsg);
++		break;
++
++	case SC_WRITE_10:
++		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9;
++		if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
++				(1<<1) | (0xf<<2) | (3<<7), 1,
++				"WRITE(10)")) == 0)
++			reply = do_write(fsg);
++		break;
++
++	case SC_WRITE_12:
++		fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9;
++		if ((reply = check_command(fsg, 12, DATA_DIR_FROM_HOST,
++				(1<<1) | (0xf<<2) | (0xf<<6), 1,
++				"WRITE(12)")) == 0)
++			reply = do_write(fsg);
++		break;
++
++	/* Some mandatory commands that we recognize but don't implement.
++	 * They don't mean much in this setting.  It's left as an exercise
++	 * for anyone interested to implement RESERVE and RELEASE in terms
++	 * of Posix locks. */
++	case SC_FORMAT_UNIT:
++	case SC_RELEASE:
++	case SC_RESERVE:
++	case SC_SEND_DIAGNOSTIC:
++		// Fall through
++
++	default:
++		fsg->data_size_from_cmnd = 0;
++		sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]);
++		if ((reply = check_command(fsg, fsg->cmnd_size,
++				DATA_DIR_UNKNOWN, 0xff, 0, unknown)) == 0) {
++			fsg->curlun->sense_data = SS_INVALID_COMMAND;
++			reply = -EINVAL;
++		}
++		break;
++	}
++	up_read(&fsg->filesem);
++
++	if (reply == -EINTR || signal_pending(current))
++		return -EINTR;
++
++	/* Set up the single reply buffer for finish_reply() */
++	if (reply == -EINVAL)
++		reply = 0;		// Error reply length
++	if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) {
++		reply = min((u32) reply, fsg->data_size_from_cmnd);
++		bh->inreq->length = reply;
++		bh->state = BUF_STATE_FULL;
++		fsg->residue -= reply;
++	}				// Otherwise it's already set
++
++	return 0;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
++{
++	struct usb_request	*req = bh->outreq;
++	struct bulk_cb_wrap	*cbw = (struct bulk_cb_wrap *) req->buf;
++
++	/* Was this a real packet? */
++	if (req->status)
++		return -EINVAL;
++
++	/* Is the CBW valid? */
++	if (req->actual != USB_BULK_CB_WRAP_LEN ||
++			cbw->Signature != __constant_cpu_to_le32(
++				USB_BULK_CB_SIG)) {
++		DBG(fsg, "invalid CBW: len %u sig 0x%x\n",
++				req->actual,
++				le32_to_cpu(cbw->Signature));
++
++		/* The Bulk-only spec says we MUST stall the bulk pipes!
++		 * If we want to avoid stalls, set a flag so that we will
++		 * clear the endpoint halts at the next reset. */
++		if (!mod_data.can_stall)
++			set_bit(CLEAR_BULK_HALTS, &fsg->atomic_bitflags);
++		fsg_set_halt(fsg, fsg->bulk_out);
++		halt_bulk_in_endpoint(fsg);
++		return -EINVAL;
++	}
++
++	/* Is the CBW meaningful? */
++	if (cbw->Lun >= MAX_LUNS || cbw->Flags & ~USB_BULK_IN_FLAG ||
++			cbw->Length < 6 || cbw->Length > MAX_COMMAND_SIZE) {
++		DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, "
++				"cmdlen %u\n",
++				cbw->Lun, cbw->Flags, cbw->Length);
++
++		/* We can do anything we want here, so let's stall the
++		 * bulk pipes if we are allowed to. */
++		if (mod_data.can_stall) {
++			fsg_set_halt(fsg, fsg->bulk_out);
++			halt_bulk_in_endpoint(fsg);
++		}
++		return -EINVAL;
++	}
++
++	/* Save the command for later */
++	fsg->cmnd_size = cbw->Length;
++	memcpy(fsg->cmnd, cbw->CDB, fsg->cmnd_size);
++	if (cbw->Flags & USB_BULK_IN_FLAG)
++		fsg->data_dir = DATA_DIR_TO_HOST;
++	else
++		fsg->data_dir = DATA_DIR_FROM_HOST;
++	fsg->data_size = le32_to_cpu(cbw->DataTransferLength);
++	if (fsg->data_size == 0)
++		fsg->data_dir = DATA_DIR_NONE;
++	fsg->lun = cbw->Lun;
++	fsg->tag = cbw->Tag;
++	return 0;
++}
++
++
++static int get_next_command(struct fsg_dev *fsg)
++{
++	struct fsg_buffhd	*bh;
++	int			rc = 0;
++
++	if (transport_is_bbb()) {
++
++		/* Wait for the next buffer to become available */
++		bh = fsg->next_buffhd_to_fill;
++		while (bh->state != BUF_STATE_EMPTY) {
++			if ((rc = sleep_thread(fsg)) != 0)
++				return rc;
++			}
++
++		/* Queue a request to read a Bulk-only CBW */
++		set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN);
++		start_transfer(fsg, fsg->bulk_out, bh->outreq,
++				&bh->outreq_busy, &bh->state);
++
++		/* We will drain the buffer in software, which means we
++		 * can reuse it for the next filling.  No need to advance
++		 * next_buffhd_to_fill. */
++
++		/* Wait for the CBW to arrive */
++		while (bh->state != BUF_STATE_FULL) {
++			if ((rc = sleep_thread(fsg)) != 0)
++				return rc;
++			}
++		rc = received_cbw(fsg, bh);
++		bh->state = BUF_STATE_EMPTY;
++
++	} else {		// USB_PR_CB or USB_PR_CBI
++
++		/* Wait for the next command to arrive */
++		while (fsg->cbbuf_cmnd_size == 0) {
++			if ((rc = sleep_thread(fsg)) != 0)
++				return rc;
++			}
++
++		/* Is the previous status interrupt request still busy?
++		 * The host is allowed to skip reading the status,
++		 * so we must cancel it. */
++		if (fsg->intreq_busy)
++			usb_ep_dequeue(fsg->intr_in, fsg->intreq);
++
++		/* Copy the command and mark the buffer empty */
++		fsg->data_dir = DATA_DIR_UNKNOWN;
++		spin_lock_irq(&fsg->lock);
++		fsg->cmnd_size = fsg->cbbuf_cmnd_size;
++		memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size);
++		fsg->cbbuf_cmnd_size = 0;
++		spin_unlock_irq(&fsg->lock);
++	}
++	return rc;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep,
++		const struct usb_endpoint_descriptor *d)
++{
++	int	rc;
++
++	ep->driver_data = fsg;
++	rc = usb_ep_enable(ep, d);
++	if (rc)
++		ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc);
++	return rc;
++}
++
++static int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep,
++		struct usb_request **preq)
++{
++	*preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
++	if (*preq)
++		return 0;
++	ERROR(fsg, "can't allocate request for %s\n", ep->name);
++	return -ENOMEM;
++}
++
++/*
++ * Reset interface setting and re-init endpoint state (toggle etc).
++ * Call with altsetting < 0 to disable the interface.  The only other
++ * available altsetting is 0, which enables the interface.
++ */
++static int do_set_interface(struct fsg_dev *fsg, int altsetting)
++{
++	int	rc = 0;
++	int	i;
++	const struct usb_endpoint_descriptor	*d;
++
++	if (fsg->running)
++		DBG(fsg, "reset interface\n");
++
++reset:
++	/* Deallocate the requests */
++	for (i = 0; i < NUM_BUFFERS; ++i) {
++		struct fsg_buffhd *bh = &fsg->buffhds[i];
++
++		if (bh->inreq) {
++			usb_ep_free_request(fsg->bulk_in, bh->inreq);
++			bh->inreq = NULL;
++		}
++		if (bh->outreq) {
++			usb_ep_free_request(fsg->bulk_out, bh->outreq);
++			bh->outreq = NULL;
++		}
++	}
++	if (fsg->intreq) {
++		usb_ep_free_request(fsg->intr_in, fsg->intreq);
++		fsg->intreq = NULL;
++	}
++
++	/* Disable the endpoints */
++	if (fsg->bulk_in_enabled) {
++		usb_ep_disable(fsg->bulk_in);
++		fsg->bulk_in_enabled = 0;
++	}
++	if (fsg->bulk_out_enabled) {
++		usb_ep_disable(fsg->bulk_out);
++		fsg->bulk_out_enabled = 0;
++	}
++	if (fsg->intr_in_enabled) {
++		usb_ep_disable(fsg->intr_in);
++		fsg->intr_in_enabled = 0;
++	}
++
++	fsg->running = 0;
++	if (altsetting < 0 || rc != 0)
++		return rc;
++
++	DBG(fsg, "set interface %d\n", altsetting);
++
++	/* Enable the endpoints */
++	d = ep_desc(fsg->gadget, &fs_bulk_in_desc, &hs_bulk_in_desc);
++	if ((rc = enable_endpoint(fsg, fsg->bulk_in, d)) != 0)
++		goto reset;
++	fsg->bulk_in_enabled = 1;
++
++	d = ep_desc(fsg->gadget, &fs_bulk_out_desc, &hs_bulk_out_desc);
++	if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0)
++		goto reset;
++	fsg->bulk_out_enabled = 1;
++	fsg->bulk_out_maxpacket = d->wMaxPacketSize;
++
++	if (transport_is_cbi()) {
++		d = ep_desc(fsg->gadget, &fs_intr_in_desc, &hs_intr_in_desc);
++		if ((rc = enable_endpoint(fsg, fsg->intr_in, d)) != 0)
++			goto reset;
++		fsg->intr_in_enabled = 1;
++	}
++
++	/* Allocate the requests */
++	for (i = 0; i < NUM_BUFFERS; ++i) {
++		struct fsg_buffhd	*bh = &fsg->buffhds[i];
++
++		if ((rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq)) != 0)
++			goto reset;
++		if ((rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq)) != 0)
++			goto reset;
++		bh->inreq->buf = bh->outreq->buf = bh->buf;
++		bh->inreq->dma = bh->outreq->dma = bh->dma;
++		bh->inreq->context = bh->outreq->context = bh;
++		bh->inreq->complete = bulk_in_complete;
++		bh->outreq->complete = bulk_out_complete;
++	}
++	if (transport_is_cbi()) {
++		if ((rc = alloc_request(fsg, fsg->intr_in, &fsg->intreq)) != 0)
++			goto reset;
++		fsg->intreq->complete = intr_in_complete;
++	}
++
++	fsg->running = 1;
++	for (i = 0; i < fsg->nluns; ++i)
++		fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED;
++	return rc;
++}
++
++
++/*
++ * Change our operational configuration.  This code must agree with the code
++ * that returns config descriptors, and with interface altsetting code.
++ *
++ * It's also responsible for power management interactions.  Some
++ * configurations might not work with our current power sources.
++ * For now we just assume the gadget is always self-powered.
++ */
++static int do_set_config(struct fsg_dev *fsg, u8 new_config)
++{
++	int	rc = 0;
++
++	/* Disable the single interface */
++	if (fsg->config != 0) {
++		DBG(fsg, "reset config\n");
++		fsg->config = 0;
++		rc = do_set_interface(fsg, -1);
++	}
++
++	/* Enable the interface */
++	if (new_config != 0) {
++		fsg->config = new_config;
++		if ((rc = do_set_interface(fsg, 0)) != 0)
++			fsg->config = 0;	// Reset on errors
++		else {
++			char *speed;
++
++			switch (fsg->gadget->speed) {
++			case USB_SPEED_LOW:	speed = "low";	break;
++			case USB_SPEED_FULL:	speed = "full";	break;
++			case USB_SPEED_HIGH:	speed = "high";	break;
++			default: 		speed = "?";	break;
++			}
++			INFO(fsg, "%s speed config #%d\n", speed, fsg->config);
++		}
++	}
++	return rc;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static void handle_exception(struct fsg_dev *fsg)
++{
++	siginfo_t		info;
++	int			sig;
++	int			i;
++	int			num_active;
++	struct fsg_buffhd	*bh;
++	enum fsg_state		old_state;
++	u8			new_config;
++	struct lun		*curlun;
++	unsigned int		exception_req_tag;
++	int			rc;
++
++	/* Clear the existing signals.  Anything but SIGUSR1 is converted
++	 * into a high-priority EXIT exception. */
++	for (;;) {
++		spin_lock_irq(&current->sigmask_lock);
++		sig = dequeue_signal(&fsg->thread_signal_mask, &info);
++		spin_unlock_irq(&current->sigmask_lock);
++		if (!sig)
++			break;
++		if (sig != SIGUSR1) {
++			if (fsg->state < FSG_STATE_EXIT)
++				DBG(fsg, "Main thread exiting on signal\n");
++			raise_exception(fsg, FSG_STATE_EXIT);
++		}
++	}
++
++	/* Cancel all the pending transfers */
++	if (fsg->intreq_busy)
++		usb_ep_dequeue(fsg->intr_in, fsg->intreq);
++	for (i = 0; i < NUM_BUFFERS; ++i) {
++		bh = &fsg->buffhds[i];
++		if (bh->inreq_busy)
++			usb_ep_dequeue(fsg->bulk_in, bh->inreq);
++		if (bh->outreq_busy)
++			usb_ep_dequeue(fsg->bulk_out, bh->outreq);
++	}
++
++	/* Wait until everything is idle */
++	for (;;) {
++		num_active = fsg->intreq_busy;
++		for (i = 0; i < NUM_BUFFERS; ++i) {
++			bh = &fsg->buffhds[i];
++			num_active += bh->inreq_busy + bh->outreq_busy;
++		}
++		if (num_active == 0)
++			break;
++		if (sleep_thread(fsg))
++			return;
++	}
++
++	/* Clear out the controller's fifos */
++	if (fsg->bulk_in_enabled)
++		usb_ep_fifo_flush(fsg->bulk_in);
++	if (fsg->bulk_out_enabled)
++		usb_ep_fifo_flush(fsg->bulk_out);
++	if (fsg->intr_in_enabled)
++		usb_ep_fifo_flush(fsg->intr_in);
++
++	/* Reset the I/O buffer states and pointers, the SCSI
++	 * state, and the exception.  Then invoke the handler. */
++	spin_lock_irq(&fsg->lock);
++
++	for (i = 0; i < NUM_BUFFERS; ++i) {
++		bh = &fsg->buffhds[i];
++		bh->state = BUF_STATE_EMPTY;
++	}
++	fsg->next_buffhd_to_fill = fsg->next_buffhd_to_drain =
++			&fsg->buffhds[0];
++
++	exception_req_tag = fsg->exception_req_tag;
++	new_config = fsg->new_config;
++	old_state = fsg->state;
++
++	if (old_state == FSG_STATE_ABORT_BULK_OUT)
++		fsg->state = FSG_STATE_STATUS_PHASE;
++	else {
++		for (i = 0; i < fsg->nluns; ++i) {
++			curlun = &fsg->luns[i];
++			curlun->prevent_medium_removal = 0;
++			curlun->sense_data = curlun->unit_attention_data =
++					SS_NO_SENSE;
++			curlun->sense_data_info = 0;
++		}
++		fsg->state = FSG_STATE_IDLE;
++	}
++	spin_unlock_irq(&fsg->lock);
++
++	/* Carry out any extra actions required for the exception */
++	switch (old_state) {
++	default:
++		break;
++
++	case FSG_STATE_ABORT_BULK_OUT:
++		send_status(fsg);
++		spin_lock_irq(&fsg->lock);
++		if (fsg->state == FSG_STATE_STATUS_PHASE)
++			fsg->state = FSG_STATE_IDLE;
++		spin_unlock_irq(&fsg->lock);
++		break;
++
++	case FSG_STATE_RESET:
++		/* In case we were forced against our will to halt a
++		 * bulk endpoint, clear the halt now.  (The SuperH UDC
++		 * requires this.) */
++		if (test_and_clear_bit(CLEAR_BULK_HALTS,
++				&fsg->atomic_bitflags)) {
++			usb_ep_clear_halt(fsg->bulk_in);
++			usb_ep_clear_halt(fsg->bulk_out);
++		}
++
++		if (transport_is_bbb()) {
++			if (fsg->ep0_req_tag == exception_req_tag)
++				ep0_queue(fsg);	// Complete the status stage
++
++		} else if (transport_is_cbi())
++			send_status(fsg);	// Status by interrupt pipe
++
++		/* Technically this should go here, but it would only be
++		 * a waste of time.  Ditto for the INTERFACE_CHANGE and
++		 * CONFIG_CHANGE cases. */
++		// for (i = 0; i < fsg->nluns; ++i)
++		//	fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED;
++		break;
++
++	case FSG_STATE_INTERFACE_CHANGE:
++		rc = do_set_interface(fsg, 0);
++		if (fsg->ep0_req_tag != exception_req_tag)
++			break;
++		if (rc != 0)			// STALL on errors
++			fsg_set_halt(fsg, fsg->ep0);
++		else				// Complete the status stage
++			ep0_queue(fsg);
++		break;
++
++	case FSG_STATE_CONFIG_CHANGE:
++		rc = do_set_config(fsg, new_config);
++		if (fsg->ep0_req_tag != exception_req_tag)
++			break;
++		if (rc != 0)			// STALL on errors
++			fsg_set_halt(fsg, fsg->ep0);
++		else				// Complete the status stage
++			ep0_queue(fsg);
++		break;
++
++	case FSG_STATE_DISCONNECT:
++		fsync_all(fsg);
++		do_set_config(fsg, 0);		// Unconfigured state
++		break;
++
++	case FSG_STATE_EXIT:
++	case FSG_STATE_TERMINATED:
++		do_set_config(fsg, 0);			// Free resources
++		spin_lock_irq(&fsg->lock);
++		fsg->state = FSG_STATE_TERMINATED;	// Stop the thread
++		spin_unlock_irq(&fsg->lock);
++		break;
++	}
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int fsg_main_thread(void *fsg_)
++{
++	struct fsg_dev		*fsg = (struct fsg_dev *) fsg_;
++
++	fsg->thread_task = current;
++
++	/* Release all our userspace resources */
++	daemonize();
++	reparent_to_init();
++	strncpy(current->comm, "file-storage-gadget",
++			sizeof(current->comm) - 1);
++
++	/* Allow the thread to be killed by a signal, but set the signal mask
++	 * to block everything but INT, TERM, KILL, and USR1. */
++	siginitsetinv(&fsg->thread_signal_mask, sigmask(SIGINT) |
++			sigmask(SIGTERM) | sigmask(SIGKILL) |
++			sigmask(SIGUSR1));
++	spin_lock_irq(&current->sigmask_lock);
++	flush_signals(current);
++	current->blocked = fsg->thread_signal_mask;
++	recalc_sigpending(current);
++	spin_unlock_irq(&current->sigmask_lock);
++
++	/* Arrange for userspace references to be interpreted as kernel
++	 * pointers.  That way we can pass a kernel pointer to a routine
++	 * that expects a __user pointer and it will work okay. */
++	set_fs(get_ds());
++
++	/* Wait for the gadget registration to finish up */
++	wait_for_completion(&fsg->thread_notifier);
++
++	/* The main loop */
++	while (fsg->state != FSG_STATE_TERMINATED) {
++		if (exception_in_progress(fsg) || signal_pending(current)) {
++			handle_exception(fsg);
++			continue;
++		}
++
++		if (!fsg->running) {
++			sleep_thread(fsg);
++			continue;
++		}
++
++		if (get_next_command(fsg))
++			continue;
++
++		spin_lock_irq(&fsg->lock);
++		if (!exception_in_progress(fsg))
++			fsg->state = FSG_STATE_DATA_PHASE;
++		spin_unlock_irq(&fsg->lock);
++
++		if (do_scsi_command(fsg) || finish_reply(fsg))
++			continue;
++
++		spin_lock_irq(&fsg->lock);
++		if (!exception_in_progress(fsg))
++			fsg->state = FSG_STATE_STATUS_PHASE;
++		spin_unlock_irq(&fsg->lock);
++
++		if (send_status(fsg))
++			continue;
++
++		spin_lock_irq(&fsg->lock);
++		if (!exception_in_progress(fsg))
++			fsg->state = FSG_STATE_IDLE;
++		spin_unlock_irq(&fsg->lock);
++		}
++
++	fsg->thread_task = NULL;
++	flush_signals(current);
++
++	/* In case we are exiting because of a signal, unregister the
++	 * gadget driver and close the backing file. */
++	if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags)) {
++		usb_gadget_unregister_driver(&fsg_driver);
++		close_all_backing_files(fsg);
++	}
++
++	/* Let the unbind and cleanup routines know the thread has exited */
++	complete_and_exit(&fsg->thread_notifier, 0);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++/* If the next two routines are called while the gadget is registered,
++ * the caller must own fsg->filesem for writing. */
++
++static int NORMALLY_INIT open_backing_file(struct lun *curlun,
++		const char *filename)
++{
++	int				ro;
++	struct file			*filp = NULL;
++	int				rc = -EINVAL;
++	struct inode			*inode = NULL;
++	loff_t				size;
++	loff_t				num_sectors;
++
++	/* R/W if we can, R/O if we must */
++	ro = curlun->ro;
++	if (!ro) {
++		filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0);
++		if (-EROFS == PTR_ERR(filp))
++			ro = 1;
++	}
++	if (ro)
++		filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0);
++	if (IS_ERR(filp)) {
++		LINFO(curlun, "unable to open backing file: %s\n", filename);
++		return PTR_ERR(filp);
++	}
++
++	if (!(filp->f_mode & FMODE_WRITE))
++		ro = 1;
++
++	if (filp->f_dentry)
++		inode = filp->f_dentry->d_inode;
++	if (inode && S_ISBLK(inode->i_mode)) {
++		kdev_t		dev = inode->i_rdev;
++
++		if (blk_size[MAJOR(dev)])
++			size = (loff_t) blk_size[MAJOR(dev)][MINOR(dev)] <<
++					BLOCK_SIZE_BITS;
++		else {
++			LINFO(curlun, "unable to find file size: %s\n",
++					filename);
++			goto out;
++		}
++	} else if (inode && S_ISREG(inode->i_mode))
++		size = inode->i_size;
++	else {
++		LINFO(curlun, "invalid file type: %s\n", filename);
++		goto out;
++	}
++
++	/* If we can't read the file, it's no good.
++	 * If we can't write the file, use it read-only. */
++	if (!filp->f_op || !filp->f_op->read) {
++		LINFO(curlun, "file not readable: %s\n", filename);
++		goto out;
++	}
++	if (IS_RDONLY(inode) || !filp->f_op->write)
++		ro = 1;
++
++	num_sectors = size >> 9;	// File size in 512-byte sectors
++	if (num_sectors == 0) {
++		LINFO(curlun, "file too small: %s\n", filename);
++		rc = -ETOOSMALL;
++		goto out;
++	}
++
++	get_file(filp);
++	curlun->ro = ro;
++	curlun->filp = filp;
++	curlun->file_length = size;
++	curlun->num_sectors = num_sectors;
++	LDBG(curlun, "open backing file: %s\n", filename);
++	rc = 0;
++
++out:
++	filp_close(filp, current->files);
++	return rc;
++}
++
++
++static void close_backing_file(struct lun *curlun)
++{
++	if (curlun->filp) {
++		LDBG(curlun, "close backing file\n");
++		fput(curlun->filp);
++		curlun->filp = NULL;
++	}
++}
++
++static void close_all_backing_files(struct fsg_dev *fsg)
++{
++	int	i;
++
++	for (i = 0; i < fsg->nluns; ++i)
++		close_backing_file(&fsg->luns[i]);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static void fsg_unbind(struct usb_gadget *gadget)
++{
++	struct fsg_dev		*fsg = get_gadget_data(gadget);
++	int			i;
++	struct usb_request	*req = fsg->ep0req;
++
++	DBG(fsg, "unbind\n");
++	clear_bit(REGISTERED, &fsg->atomic_bitflags);
++
++	/* If the thread isn't already dead, tell it to exit now */
++	if (fsg->state != FSG_STATE_TERMINATED) {
++		raise_exception(fsg, FSG_STATE_EXIT);
++		wait_for_completion(&fsg->thread_notifier);
++
++		/* The cleanup routine waits for this completion also */
++		complete(&fsg->thread_notifier);
++	}
++
++	/* Free the data buffers */
++	for (i = 0; i < NUM_BUFFERS; ++i) {
++		struct fsg_buffhd	*bh = &fsg->buffhds[i];
++
++		if (bh->buf)
++			usb_ep_free_buffer(fsg->bulk_in, bh->buf, bh->dma,
++					mod_data.buflen);
++	}
++
++	/* Free the request and buffer for endpoint 0 */
++	if (req) {
++		if (req->buf)
++			usb_ep_free_buffer(fsg->ep0, req->buf,
++					req->dma, EP0_BUFSIZE);
++		usb_ep_free_request(fsg->ep0, req);
++	}
++
++	set_gadget_data(gadget, 0);
++}
++
++
++static int __init check_parameters(struct fsg_dev *fsg)
++{
++	int	prot;
++
++	/* Store the default values */
++	mod_data.transport_type = USB_PR_BULK;
++	mod_data.transport_name = "Bulk-only";
++	mod_data.protocol_type = USB_SC_SCSI;
++	mod_data.protocol_name = "Transparent SCSI";
++
++	if (gadget_is_sh(fsg->gadget))
++		mod_data.can_stall = 0;
++
++	if (mod_data.release == 0xffff) {	// Parameter wasn't set
++		if (gadget_is_net2280(fsg->gadget))
++			mod_data.release = __constant_cpu_to_le16(0x0221);
++		else if (gadget_is_dummy(fsg->gadget))
++			mod_data.release = __constant_cpu_to_le16(0x0222);
++		else if (gadget_is_pxa(fsg->gadget))
++			mod_data.release = __constant_cpu_to_le16(0x0223);
++		else if (gadget_is_sh(fsg->gadget))
++			mod_data.release = __constant_cpu_to_le16(0x0224);
++
++		/* The sa1100 controller is not supported */
++
++		else if (gadget_is_goku(fsg->gadget))
++			mod_data.release = __constant_cpu_to_le16(0x0226);
++		else if (gadget_is_mq11xx(fsg->gadget))
++			mod_data.release = __constant_cpu_to_le16(0x0227);
++		else if (gadget_is_omap(fsg->gadget))
++			mod_data.release = __constant_cpu_to_le16(0x0228);
++		else {
++			WARN(fsg, "controller '%s' not recognized\n",
++				fsg->gadget->name);
++			mod_data.release = __constant_cpu_to_le16(0x0299);
++		}
++	}
++
++	prot = simple_strtol(mod_data.protocol_parm, NULL, 0);
++
++#ifdef CONFIG_USB_FILE_STORAGE_TEST
++	if (strnicmp(mod_data.transport_parm, "BBB", 10) == 0) {
++		;		// Use default setting
++	} else if (strnicmp(mod_data.transport_parm, "CB", 10) == 0) {
++		mod_data.transport_type = USB_PR_CB;
++		mod_data.transport_name = "Control-Bulk";
++	} else if (strnicmp(mod_data.transport_parm, "CBI", 10) == 0) {
++		mod_data.transport_type = USB_PR_CBI;
++		mod_data.transport_name = "Control-Bulk-Interrupt";
++	} else {
++		ERROR(fsg, "invalid transport: %s\n", mod_data.transport_parm);
++		return -EINVAL;
++	}
++
++	if (strnicmp(mod_data.protocol_parm, "SCSI", 10) == 0 ||
++			prot == USB_SC_SCSI) {
++		;		// Use default setting
++	} else if (strnicmp(mod_data.protocol_parm, "RBC", 10) == 0 ||
++			prot == USB_SC_RBC) {
++		mod_data.protocol_type = USB_SC_RBC;
++		mod_data.protocol_name = "RBC";
++	} else if (strnicmp(mod_data.protocol_parm, "8020", 4) == 0 ||
++			strnicmp(mod_data.protocol_parm, "ATAPI", 10) == 0 ||
++			prot == USB_SC_8020) {
++		mod_data.protocol_type = USB_SC_8020;
++		mod_data.protocol_name = "8020i (ATAPI)";
++	} else if (strnicmp(mod_data.protocol_parm, "QIC", 3) == 0 ||
++			prot == USB_SC_QIC) {
++		mod_data.protocol_type = USB_SC_QIC;
++		mod_data.protocol_name = "QIC-157";
++	} else if (strnicmp(mod_data.protocol_parm, "UFI", 10) == 0 ||
++			prot == USB_SC_UFI) {
++		mod_data.protocol_type = USB_SC_UFI;
++		mod_data.protocol_name = "UFI";
++	} else if (strnicmp(mod_data.protocol_parm, "8070", 4) == 0 ||
++			prot == USB_SC_8070) {
++		mod_data.protocol_type = USB_SC_8070;
++		mod_data.protocol_name = "8070i";
++	} else {
++		ERROR(fsg, "invalid protocol: %s\n", mod_data.protocol_parm);
++		return -EINVAL;
++	}
++
++	mod_data.buflen &= PAGE_CACHE_MASK;
++	if (mod_data.buflen <= 0) {
++		ERROR(fsg, "invalid buflen\n");
++		return -ETOOSMALL;
++	}
++#endif /* CONFIG_USB_FILE_STORAGE_TEST */
++
++	return 0;
++}
++
++
++static int __init fsg_bind(struct usb_gadget *gadget)
++{
++	struct fsg_dev		*fsg = the_fsg;
++	int			rc;
++	int			i;
++	struct lun		*curlun;
++	struct usb_ep		*ep;
++	struct usb_request	*req;
++	char			*pathbuf, *p;
++
++	fsg->gadget = gadget;
++	set_gadget_data(gadget, fsg);
++	fsg->ep0 = gadget->ep0;
++	fsg->ep0->driver_data = fsg;
++
++	if ((rc = check_parameters(fsg)) != 0)
++		goto out;
++
++	/* Find out how many LUNs there should be */
++	i = mod_data.nluns;
++	if (i == 0) {
++		for (i = MAX_LUNS; i > 1; --i) {
++			if (file[i - 1])
++				break;
++		}
++	}
++	if (i > MAX_LUNS) {
++		ERROR(fsg, "invalid number of LUNs: %d\n", i);
++		rc = -EINVAL;
++		goto out;
++	}
++
++	/* Create the LUNs and open their backing files.  We can't register
++	 * the LUN devices until the gadget itself is registered, which
++	 * doesn't happen until after fsg_bind() returns. */
++	fsg->luns = kmalloc(i * sizeof(struct lun), GFP_KERNEL);
++	if (!fsg->luns) {
++		rc = -ENOMEM;
++		goto out;
++	}
++	memset(fsg->luns, 0, i * sizeof(struct lun));
++	fsg->nluns = i;
++
++	for (i = 0; i < fsg->nluns; ++i) {
++		curlun = &fsg->luns[i];
++		curlun->ro = ro[i];
++		curlun->dev.driver_data = fsg;
++		snprintf(curlun->dev.name, BUS_ID_SIZE,
++				"%s-lun%d", gadget->name, i);
++
++		if (file[i] && *file[i]) {
++			if ((rc = open_backing_file(curlun, file[i])) != 0)
++				goto out;
++		} else if (!mod_data.removable) {
++			ERROR(fsg, "no file given for LUN%d\n", i);
++			rc = -EINVAL;
++			goto out;
++		}
++	}
++
++	/* Find all the endpoints we will use */
++	usb_ep_autoconfig_reset(gadget);
++	ep = usb_ep_autoconfig(gadget, &fs_bulk_in_desc);
++	if (!ep)
++		goto autoconf_fail;
++	ep->driver_data = fsg;		// claim the endpoint
++	fsg->bulk_in = ep;
++
++	ep = usb_ep_autoconfig(gadget, &fs_bulk_out_desc);
++	if (!ep)
++		goto autoconf_fail;
++	ep->driver_data = fsg;		// claim the endpoint
++	fsg->bulk_out = ep;
++
++	if (transport_is_cbi()) {
++		ep = usb_ep_autoconfig(gadget, &fs_intr_in_desc);
++		if (!ep)
++			goto autoconf_fail;
++		ep->driver_data = fsg;		// claim the endpoint
++		fsg->intr_in = ep;
++	}
++
++	/* Fix up the descriptors */
++	device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket;
++	device_desc.idVendor = cpu_to_le16(mod_data.vendor);
++	device_desc.idProduct = cpu_to_le16(mod_data.product);
++	device_desc.bcdDevice = cpu_to_le16(mod_data.release);
++
++	i = (transport_is_cbi() ? 3 : 2);	// Number of endpoints
++	intf_desc.bNumEndpoints = i;
++	intf_desc.bInterfaceSubClass = mod_data.protocol_type;
++	intf_desc.bInterfaceProtocol = mod_data.transport_type;
++	fs_function[i+1] = NULL;
++
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	hs_function[i+1] = NULL;
++
++	/* Assume ep0 uses the same maxpacket value for both speeds */
++	dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket;
++
++	/* Assume that all endpoint addresses are the same for both speeds */
++	hs_bulk_in_desc.bEndpointAddress = fs_bulk_in_desc.bEndpointAddress;
++	hs_bulk_out_desc.bEndpointAddress = fs_bulk_out_desc.bEndpointAddress;
++	hs_intr_in_desc.bEndpointAddress = fs_intr_in_desc.bEndpointAddress;
++#endif
++
++	rc = -ENOMEM;
++
++	/* Allocate the request and buffer for endpoint 0 */
++	fsg->ep0req = req = usb_ep_alloc_request(fsg->ep0, GFP_KERNEL);
++	if (!req)
++		goto out;
++	req->buf = usb_ep_alloc_buffer(fsg->ep0, EP0_BUFSIZE,
++			&req->dma, GFP_KERNEL);
++	if (!req->buf)
++		goto out;
++	req->complete = ep0_complete;
++
++	/* Allocate the data buffers */
++	for (i = 0; i < NUM_BUFFERS; ++i) {
++		struct fsg_buffhd	*bh = &fsg->buffhds[i];
++
++		bh->buf = usb_ep_alloc_buffer(fsg->bulk_in, mod_data.buflen,
++				&bh->dma, GFP_KERNEL);
++		if (!bh->buf)
++			goto out;
++		bh->next = bh + 1;
++	}
++	fsg->buffhds[NUM_BUFFERS - 1].next = &fsg->buffhds[0];
++
++	/* This should reflect the actual gadget power source */
++	usb_gadget_set_selfpowered(gadget);
++
++	snprintf(manufacturer, sizeof manufacturer,
++			UTS_SYSNAME " " UTS_RELEASE " with %s",
++			gadget->name);
++
++	/* On a real device, serial[] would be loaded from permanent
++	 * storage.  We just encode it from the driver version string. */
++	for (i = 0; i < sizeof(serial) - 2; i += 2) {
++		unsigned char		c = DRIVER_VERSION[i / 2];
++
++		if (!c)
++			break;
++		sprintf(&serial[i], "%02X", c);
++	}
++
++	if ((rc = kernel_thread(fsg_main_thread, fsg, (CLONE_VM | CLONE_FS |
++			CLONE_FILES))) < 0)
++		goto out;
++	fsg->thread_pid = rc;
++
++	INFO(fsg, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
++	INFO(fsg, "Number of LUNs=%d\n", fsg->nluns);
++
++	pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
++	for (i = 0; i < fsg->nluns; ++i) {
++		curlun = &fsg->luns[i];
++		if (backing_file_is_open(curlun)) {
++			p = NULL;
++			if (pathbuf) {
++				p = d_path(curlun->filp->f_dentry,
++					curlun->filp->f_vfsmnt,
++					pathbuf, PATH_MAX);
++				if (IS_ERR(p))
++					p = NULL;
++			}
++			LINFO(curlun, "ro=%d, file: %s\n",
++					curlun->ro, (p ? p : "(error)"));
++		}
++	}
++	kfree(pathbuf);
++
++	DBG(fsg, "transport=%s (x%02x)\n",
++			mod_data.transport_name, mod_data.transport_type);
++	DBG(fsg, "protocol=%s (x%02x)\n",
++			mod_data.protocol_name, mod_data.protocol_type);
++	DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n",
++			mod_data.vendor, mod_data.product, mod_data.release);
++	DBG(fsg, "removable=%d, stall=%d, buflen=%u\n",
++			mod_data.removable, mod_data.can_stall,
++			mod_data.buflen);
++	DBG(fsg, "I/O thread pid: %d\n", fsg->thread_pid);
++	return 0;
++
++autoconf_fail:
++	ERROR(fsg, "unable to autoconfigure all endpoints\n");
++	rc = -ENOTSUPP;
++
++out:
++	fsg->state = FSG_STATE_TERMINATED;	// The thread is dead
++	fsg_unbind(gadget);
++	close_all_backing_files(fsg);
++	return rc;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_gadget_driver		fsg_driver = {
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	.speed		= USB_SPEED_HIGH,
++#else
++	.speed		= USB_SPEED_FULL,
++#endif
++	.function	= (char *) longname,
++	.bind		= fsg_bind,
++	.unbind		= fsg_unbind,
++	.disconnect	= fsg_disconnect,
++	.setup		= fsg_setup,
++
++	.driver		= {
++		.name		= (char *) shortname,
++		// .release = ...
++		// .suspend = ...
++		// .resume = ...
++	},
++};
++
++
++static int __init fsg_alloc(void)
++{
++	struct fsg_dev		*fsg;
++
++	fsg = kmalloc(sizeof *fsg, GFP_KERNEL);
++	if (!fsg)
++		return -ENOMEM;
++	memset(fsg, 0, sizeof *fsg);
++	spin_lock_init(&fsg->lock);
++	init_rwsem(&fsg->filesem);
++	init_waitqueue_head(&fsg->thread_wqh);
++	init_completion(&fsg->thread_notifier);
++
++	the_fsg = fsg;
++	return 0;
++}
++
++
++static void fsg_free(struct fsg_dev *fsg)
++{
++	kfree(fsg->luns);
++	kfree(fsg);
++}
++
++
++static int __init fsg_init(void)
++{
++	int		rc;
++	struct fsg_dev	*fsg;
++
++	/* Put the module parameters where they belong -- arghh! */
++	mod_data.nluns = luns;
++	mod_data.transport_parm = transport;
++	mod_data.protocol_parm = protocol;
++	mod_data.removable = removable;
++	mod_data.vendor = vendor;
++	mod_data.product = product;
++	mod_data.release = release;
++	mod_data.buflen = buflen;
++	mod_data.can_stall = stall;
++
++	if ((rc = fsg_alloc()) != 0)
++		return rc;
++	fsg = the_fsg;
++	if ((rc = usb_gadget_register_driver(&fsg_driver)) != 0) {
++		fsg_free(fsg);
++		return rc;
++	}
++	set_bit(REGISTERED, &fsg->atomic_bitflags);
++
++	/* Tell the thread to start working */
++	complete(&fsg->thread_notifier);
++	return 0;
++}
++module_init(fsg_init);
++
++
++static void __exit fsg_cleanup(void)
++{
++	struct fsg_dev	*fsg = the_fsg;
++
++	/* Unregister the driver iff the thread hasn't already done so */
++	if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags))
++		usb_gadget_unregister_driver(&fsg_driver);
++
++	/* Wait for the thread to finish up */
++	wait_for_completion(&fsg->thread_notifier);
++
++	close_all_backing_files(fsg);
++	fsg_free(fsg);
++}
++module_exit(fsg_cleanup);
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/gadget_chips.h kernel/drivers/usb/gadget/gadget_chips.h
+--- /tmp/kernel/drivers/usb/gadget/gadget_chips.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/gadget_chips.h	2005-04-22 17:53:19.434539516 +0200
+@@ -0,0 +1,92 @@
++/*
++ * USB device controllers have lots of quirks.  Use these macros in
++ * gadget drivers or other code that needs to deal with them, and which
++ * autoconfigures instead of using early binding to the hardware.
++ *
++ * This could eventually work like the ARM mach_is_*() stuff, driven by
++ * some config file that gets updated as new hardware is supported.
++ *
++ * NOTE:  some of these controller drivers may not be available yet.
++ */
++#ifdef CONFIG_USB_GADGET_NET2280
++#define	gadget_is_net2280(g)	!strcmp("net2280", (g)->name)
++#else
++#define	gadget_is_net2280(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_DUMMY_HCD
++#define	gadget_is_dummy(g)	!strcmp("dummy_udc", (g)->name)
++#else
++#define	gadget_is_dummy(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_PXA2XX
++#define	gadget_is_pxa(g)	!strcmp("pxa2xx_udc", (g)->name)
++#else
++#define	gadget_is_pxa(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_GOKU
++#define	gadget_is_goku(g)	!strcmp("goku_udc", (g)->name)
++#else
++#define	gadget_is_goku(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_SUPERH
++#define	gadget_is_sh(g)		!strcmp("sh_udc", (g)->name)
++#else
++#define	gadget_is_sh(g)		0
++#endif
++
++#ifdef CONFIG_USB_GADGET_SA1100
++#define	gadget_is_sa1100(g)	!strcmp("sa1100_udc", (g)->name)
++#else
++#define	gadget_is_sa1100(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_LH7A40X
++#define	gadget_is_lh7a40x(g)	!strcmp("lh7a40x_udc", (g)->name)
++#else
++#define	gadget_is_lh7a40x(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_MQ11XX
++#define	gadget_is_mq11xx(g)	!strcmp("mq11xx_udc", (g)->name)
++#else
++#define	gadget_is_mq11xx(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_OMAP
++#define	gadget_is_omap(g)	!strcmp("omap_udc", (g)->name)
++#else
++#define	gadget_is_omap(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_N9604
++#define	gadget_is_n9604(g)	!strcmp("n9604_udc", (g)->name)
++#else
++#define	gadget_is_n9604(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_PXA27X
++#define	gadget_is_pxa27x(g)	!strcmp("pxa27x_udc", (g)->name)
++#else
++#define	gadget_is_pxa27x(g)	0
++#endif
++
++#ifdef CONFIG_USB_GADGET_S3C2410
++#define gadget_is_s3c2410(g)    !strcmp("s3c2410_udc", (g)->name)
++#else
++#define gadget_is_s3c2410(g)    0
++#endif
++
++#ifdef CONFIG_USB_GADGET_AT91
++#define gadget_is_at91(g)	!strcmp("at91_udc", (g)->name)
++#else
++#define gadget_is_at91(g)	0
++#endif
++
++// CONFIG_USB_GADGET_SX2
++// CONFIG_USB_GADGET_AU1X00
++// ...
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/goku_udc.c kernel/drivers/usb/gadget/goku_udc.c
+--- /tmp/kernel/drivers/usb/gadget/goku_udc.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/goku_udc.c	2005-04-22 17:53:19.440538539 +0200
+@@ -0,0 +1,1975 @@
++/*
++ * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
++ *
++ * Copyright (C) 2000-2002 Lineo
++ *      by Stuart Lynne, Tom Rushworth, and Bruce Balden
++ * Copyright (C) 2002 Toshiba Corporation
++ * Copyright (C) 2003 MontaVista Software (source@mvista.com)
++ *
++ * This file is licensed under the terms of the GNU General Public
++ * License version 2.  This program is licensed "as is" without any
++ * warranty of any kind, whether express or implied.
++ */
++
++/*
++ * This device has ep0 and three semi-configurable bulk/interrupt endpoints.
++ *
++ *  - Endpoint numbering is fixed: ep{1,2,3}-bulk
++ *  - Gadget drivers can choose ep maxpacket (8/16/32/64)
++ *  - Gadget drivers can choose direction (IN, OUT)
++ *  - DMA works with ep1 (OUT transfers) and ep2 (IN transfers).
++ */
++
++#undef DEBUG
++// #define	VERBOSE		/* extra debug messages (success too) */
++// #define	USB_TRACE	/* packet-level success messages */
++
++#include <linux/config.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/pci.h>
++#include <linux/delay.h>
++#include <linux/ioport.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/smp_lock.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++#include <linux/proc_fs.h>
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include <asm/byteorder.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/unaligned.h>
++
++
++#include "goku_udc.h"
++
++#define	DRIVER_DESC		"TC86C001 USB Device Controller"
++#define	DRIVER_VERSION		"30-Oct 2003"
++
++#define	DMA_ADDR_INVALID	(~(dma_addr_t)0)
++
++static const char driver_name [] = "goku_udc";
++static const char driver_desc [] = DRIVER_DESC;
++
++MODULE_AUTHOR("source@mvista.com");
++MODULE_DESCRIPTION(DRIVER_DESC);
++MODULE_LICENSE("GPL");
++
++
++/*
++ * IN dma behaves ok under testing, though the IN-dma abort paths don't
++ * seem to behave quite as expected.  Used by default.
++ *
++ * OUT dma documents design problems handling the common "short packet"
++ * transfer termination policy; it couldn't enabled by default, even
++ * if the OUT-dma abort problems had a resolution.
++ */
++static unsigned use_dma = 1;
++
++#if 0
++//#include <linux/moduleparam.h>
++/* "modprobe goku_udc use_dma=1" etc
++ *	0 to disable dma
++ *	1 to use IN dma only (normal operation)
++ *	2 to use IN and OUT dma
++ */
++module_param(use_dma, uint, S_IRUGO);
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++static void nuke(struct goku_ep *, int status);
++
++static inline void
++command(struct goku_udc_regs *regs, int command, unsigned epnum)
++{
++	writel(COMMAND_EP(epnum) | command, &regs->Command);
++	udelay(300);
++}
++
++static int
++goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
++{
++	struct goku_udc	*dev;
++	struct goku_ep	*ep;
++	u32		mode;
++	u16		max;
++	unsigned long	flags;
++
++	ep = container_of(_ep, struct goku_ep, ep);
++	if (!_ep || !desc || ep->desc
++			|| desc->bDescriptorType != USB_DT_ENDPOINT)
++		return -EINVAL;
++	dev = ep->dev;
++	if (ep == &dev->ep[0])
++		return -EINVAL;
++	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return -ESHUTDOWN;
++	if (ep->num != (desc->bEndpointAddress & 0x0f))
++		return -EINVAL;
++
++	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
++	case USB_ENDPOINT_XFER_BULK:
++	case USB_ENDPOINT_XFER_INT:
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK)
++			!= EPxSTATUS_EP_INVALID)
++		return -EBUSY;
++
++	/* enabling the no-toggle interrupt mode would need an api hook */
++	mode = 0;
++	max = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
++	switch (max) {
++	case 64:	mode++;
++	case 32:	mode++;
++	case 16:	mode++;
++	case 8:		mode <<= 3;
++			break;
++	default:
++		return -EINVAL;
++	}
++	mode |= 2 << 1;		/* bulk, or intr-with-toggle */
++
++	/* ep1/ep2 dma direction is chosen early; it works in the other
++	 * direction, with pio.  be cautious with out-dma.
++	 */
++	ep->is_in = (USB_DIR_IN & desc->bEndpointAddress) != 0;
++	if (ep->is_in) {
++		mode |= 1;
++		ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT);
++	} else {
++		ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT);
++		if (ep->dma)
++			DBG(dev, "%s out-dma hides short packets\n",
++				ep->ep.name);
++	}
++
++	spin_lock_irqsave(&ep->dev->lock, flags);
++
++	/* ep1 and ep2 can do double buffering and/or dma */
++	if (ep->num < 3) {
++		struct goku_udc_regs	*regs = ep->dev->regs;
++		u32			tmp;
++
++		/* double buffer except (for now) with pio in */
++		tmp = ((ep->dma || !ep->is_in)
++				? 0x10	/* double buffered */
++				: 0x11	/* single buffer */
++			) << ep->num;
++		tmp |= readl(&regs->EPxSingle);
++		writel(tmp, &regs->EPxSingle);
++
++		tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num;
++		tmp |= readl(&regs->EPxBCS);
++		writel(tmp, &regs->EPxBCS);
++	}
++	writel(mode, ep->reg_mode);
++	command(ep->dev->regs, COMMAND_RESET, ep->num);
++	ep->ep.maxpacket = max;
++	ep->stopped = 0;
++	ep->desc = desc;
++	spin_unlock_irqrestore(&ep->dev->lock, flags);
++
++	DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name,
++		ep->is_in ? "IN" : "OUT",
++		ep->dma ? "dma" : "pio",
++		max);
++
++	return 0;
++}
++
++static void ep_reset(struct goku_udc_regs *regs, struct goku_ep *ep)
++{
++	struct goku_udc		*dev = ep->dev;
++
++	if (regs) {
++		command(regs, COMMAND_INVALID, ep->num);
++		if (ep->num) {
++			if (ep->num == UDC_MSTWR_ENDPOINT)
++				dev->int_enable &= ~(INT_MSTWREND
++							|INT_MSTWRTMOUT);
++			else if (ep->num == UDC_MSTRD_ENDPOINT)
++				dev->int_enable &= ~INT_MSTRDEND;
++			dev->int_enable &= ~INT_EPxDATASET (ep->num);
++		} else
++			dev->int_enable &= ~INT_EP0;
++		writel(dev->int_enable, &regs->int_enable);
++		readl(&regs->int_enable);
++		if (ep->num < 3) {
++			struct goku_udc_regs	*regs = ep->dev->regs;
++			u32			tmp;
++
++			tmp = readl(&regs->EPxSingle);
++			tmp &= ~(0x11 << ep->num);
++			writel(tmp, &regs->EPxSingle);
++
++			tmp = readl(&regs->EPxBCS);
++			tmp &= ~(0x11 << ep->num);
++			writel(tmp, &regs->EPxBCS);
++		}
++		/* reset dma in case we're still using it */
++		if (ep->dma) {
++			u32	master;
++
++			master = readl(&regs->dma_master) & MST_RW_BITS;
++			if (ep->num == UDC_MSTWR_ENDPOINT) {
++				master &= ~MST_W_BITS;
++				master |= MST_WR_RESET;
++			} else {
++				master &= ~MST_R_BITS;
++				master |= MST_RD_RESET;
++			}
++			writel(master, &regs->dma_master);
++		}
++	}
++
++	ep->ep.maxpacket = MAX_FIFO_SIZE;
++	ep->desc = 0;
++	ep->stopped = 1;
++	ep->irqs = 0;
++	ep->dma = 0;
++}
++
++static int goku_ep_disable(struct usb_ep *_ep)
++{
++	struct goku_ep	*ep;
++	struct goku_udc	*dev;
++	unsigned long	flags;
++
++	ep = container_of(_ep, struct goku_ep, ep);
++	if (!_ep || !ep->desc)
++		return -ENODEV;
++	dev = ep->dev;
++	if (dev->ep0state == EP0_SUSPEND)
++		return -EBUSY;
++
++	VDBG(dev, "disable %s\n", _ep->name);
++
++	spin_lock_irqsave(&dev->lock, flags);
++	nuke(ep, -ESHUTDOWN);
++	ep_reset(dev->regs, ep);
++	spin_unlock_irqrestore(&dev->lock, flags);
++
++	return 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_request *
++goku_alloc_request(struct usb_ep *_ep, int gfp_flags)
++{
++	struct goku_request	*req;
++
++	if (!_ep)
++		return 0;
++	req = kmalloc(sizeof *req, gfp_flags);
++	if (!req)
++		return 0;
++
++	memset(req, 0, sizeof *req);
++	req->req.dma = DMA_ADDR_INVALID;
++	INIT_LIST_HEAD(&req->queue);
++	return &req->req;
++}
++
++static void
++goku_free_request(struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct goku_request	*req;
++
++	if (!_ep || !_req)
++		return;
++
++	req = container_of(_req, struct goku_request, req);
++	WARN_ON(!list_empty(&req->queue));
++	kfree(req);
++}
++
++/*-------------------------------------------------------------------------*/
++
++#undef USE_KMALLOC
++
++/* many common platforms have dma-coherent caches, which means that it's
++ * safe to use kmalloc() memory for all i/o buffers without using any
++ * cache flushing calls.  (unless you're trying to share cache lines
++ * between dma and non-dma activities, which is a slow idea in any case.)
++ *
++ * other platforms need more care, with 2.6 having a moderately general
++ * solution except for the common "buffer is smaller than a page" case.
++ */
++#if	defined(CONFIG_X86)
++#define USE_KMALLOC
++
++#elif	defined(CONFIG_MIPS) && !defined(CONFIG_NONCOHERENT_IO)
++#define USE_KMALLOC
++
++#elif	defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
++#define USE_KMALLOC
++
++#endif
++
++/* allocating buffers this way eliminates dma mapping overhead, which
++ * on some platforms will mean eliminating a per-io buffer copy.  with
++ * some kinds of system caches, further tweaks may still be needed.
++ */
++static void *
++goku_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
++			dma_addr_t *dma, int  gfp_flags)
++{
++	void		*retval;
++	struct goku_ep	*ep;
++
++	ep = container_of(_ep, struct goku_ep, ep);
++	if (!_ep)
++		return 0;
++	*dma = DMA_ADDR_INVALID;
++
++#if	defined(USE_KMALLOC)
++	retval = kmalloc(bytes, gfp_flags);
++	if (retval)
++		*dma = virt_to_phys(retval);
++#else
++	if (ep->dma) {
++		/* one problem with this call is that it wastes memory on
++		 * typical 1/N page allocations: it allocates 1-N pages.
++		 * another is that it always uses GFP_ATOMIC.
++		 */
++#warning Using pci_alloc_consistent even with buffers smaller than a page.
++		retval = pci_alloc_consistent(ep->dev->pdev, bytes, dma);
++	} else
++		retval = kmalloc(bytes, gfp_flags);
++#endif
++	return retval;
++}
++
++static void
++goku_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma, unsigned bytes)
++{
++	/* free memory into the right allocator */
++#ifndef	USE_KMALLOC
++	if (dma != DMA_ADDR_INVALID) {
++		struct goku_ep	*ep;
++
++		ep = container_of(_ep, struct goku_ep, ep);
++		if (!_ep)
++			return;
++		/* one problem with this call is that some platforms
++		 * don't allow it to be used in_irq().
++		 */
++		pci_free_consistent(ep->dev->pdev, bytes, buf, dma);
++	} else
++#endif
++		kfree (buf);
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void
++done(struct goku_ep *ep, struct goku_request *req, int status)
++{
++	struct goku_udc		*dev;
++	unsigned		stopped = ep->stopped;
++
++	list_del_init(&req->queue);
++
++	if (likely(req->req.status == -EINPROGRESS))
++		req->req.status = status;
++	else
++		status = req->req.status;
++
++	dev = ep->dev;
++	if (req->mapped) {
++		pci_unmap_single(dev->pdev, req->req.dma, req->req.length,
++			ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
++		req->req.dma = DMA_ADDR_INVALID;
++		req->mapped = 0;
++	}
++
++#ifndef USB_TRACE
++	if (status && status != -ESHUTDOWN)
++#endif
++		VDBG(dev, "complete %s req %p stat %d len %u/%u\n",
++			ep->ep.name, &req->req, status,
++			req->req.actual, req->req.length);
++
++	/* don't modify queue heads during completion callback */
++	ep->stopped = 1;
++	spin_unlock(&dev->lock);
++	req->req.complete(&ep->ep, &req->req);
++	spin_lock(&dev->lock);
++	ep->stopped = stopped;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static inline int
++write_packet(u32 *fifo, u8 *buf, struct goku_request *req, unsigned max)
++{
++	unsigned	length, count;
++
++	length = min(req->req.length - req->req.actual, max);
++	req->req.actual += length;
++
++	count = length;
++	while (likely(count--))
++		writel(*buf++, fifo);
++	return length;
++}
++
++// return:  0 = still running, 1 = completed, negative = errno
++static int write_fifo(struct goku_ep *ep, struct goku_request *req)
++{
++	struct goku_udc	*dev = ep->dev;
++	u32		tmp;
++	u8		*buf;
++	unsigned	count;
++	int		is_last;
++
++	tmp = readl(&dev->regs->DataSet);
++	buf = req->req.buf + req->req.actual;
++	prefetch(buf);
++
++	dev = ep->dev;
++	if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN))
++		return -EL2HLT;
++
++	/* NOTE:  just single-buffered PIO-IN for now.  */
++	if (unlikely((tmp & DATASET_A(ep->num)) != 0))
++		return 0;
++
++	/* clear our "packet available" irq */
++	if (ep->num != 0)
++		writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status);
++
++	count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket);
++
++	/* last packet often short (sometimes a zlp, especially on ep0) */
++	if (unlikely(count != ep->ep.maxpacket)) {
++		writel(~(1<<ep->num), &dev->regs->EOP);
++		if (ep->num == 0) {
++			dev->ep[0].stopped = 1;
++			dev->ep0state = EP0_STATUS;
++		}
++		is_last = 1;
++	} else {
++		if (likely(req->req.length != req->req.actual)
++				|| req->req.zero)
++			is_last = 0;
++		else
++			is_last = 1;
++	}
++#if 0		/* printk seemed to trash is_last...*/
++//#ifdef USB_TRACE
++	VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n",
++		ep->ep.name, count, is_last ? "/last" : "",
++		req->req.length - req->req.actual, req);
++#endif
++
++	/* requests complete when all IN data is in the FIFO,
++	 * or sometimes later, if a zlp was needed.
++	 */
++	if (is_last) {
++		done(ep, req, 0);
++		return 1;
++	}
++
++	return 0;
++}
++
++static int read_fifo(struct goku_ep *ep, struct goku_request *req)
++{
++	struct goku_udc_regs	*regs;
++	u32			size, set;
++	u8			*buf;
++	unsigned		bufferspace, is_short, dbuff;
++
++	regs = ep->dev->regs;
++top:
++	buf = req->req.buf + req->req.actual;
++	prefetchw(buf);
++
++	if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT))
++		return -EL2HLT;
++
++	dbuff = (ep->num == 1 || ep->num == 2);
++	do {
++		/* ack dataset irq matching the status we'll handle */
++		if (ep->num != 0)
++			writel(~INT_EPxDATASET(ep->num), &regs->int_status);
++
++		set = readl(&regs->DataSet) & DATASET_AB(ep->num);
++		size = readl(&regs->EPxSizeLA[ep->num]);
++		bufferspace = req->req.length - req->req.actual;
++
++		/* usually do nothing without an OUT packet */
++		if (likely(ep->num != 0 || bufferspace != 0)) {
++			if (unlikely(set == 0))
++				break;
++			/* use ep1/ep2 double-buffering for OUT */
++			if (!(size & PACKET_ACTIVE))
++				size = readl(&regs->EPxSizeLB[ep->num]);
++			if (!(size & PACKET_ACTIVE)) 	// "can't happen"
++				break;
++			size &= DATASIZE;	/* EPxSizeH == 0 */
++
++		/* ep0out no-out-data case for set_config, etc */
++		} else
++			size = 0;
++
++		/* read all bytes from this packet */
++		req->req.actual += size;
++		is_short = (size < ep->ep.maxpacket);
++#ifdef USB_TRACE
++		VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n",
++			ep->ep.name, size, is_short ? "/S" : "",
++			req, req->req.actual, req->req.length);
++#endif
++		while (likely(size-- != 0)) {
++			u8	byte = (u8) readl(ep->reg_fifo);
++
++			if (unlikely(bufferspace == 0)) {
++				/* this happens when the driver's buffer
++				 * is smaller than what the host sent.
++				 * discard the extra data in this packet.
++				 */
++				if (req->req.status != -EOVERFLOW)
++					DBG(ep->dev, "%s overflow %u\n",
++						ep->ep.name, size);
++				req->req.status = -EOVERFLOW;
++			} else {
++				*buf++ = byte;
++				bufferspace--;
++			}
++		}
++
++		/* completion */
++		if (unlikely(is_short || req->req.actual == req->req.length)) {
++			if (unlikely(ep->num == 0)) {
++				/* non-control endpoints now usable? */
++				if (ep->dev->req_config)
++					writel(ep->dev->configured
++							? USBSTATE_CONFIGURED
++							: 0,
++						&regs->UsbState);
++				/* ep0out status stage */
++				writel(~(1<<0), &regs->EOP);
++				ep->stopped = 1;
++				ep->dev->ep0state = EP0_STATUS;
++			}
++			done(ep, req, 0);
++
++			/* empty the second buffer asap */
++			if (dbuff && !list_empty(&ep->queue)) {
++				req = list_entry(ep->queue.next,
++						struct goku_request, queue);
++				goto top;
++			}
++			return 1;
++		}
++	} while (dbuff);
++	return 0;
++}
++
++static inline void
++pio_irq_enable(struct goku_udc *dev, struct goku_udc_regs *regs, int epnum)
++{
++	dev->int_enable |= INT_EPxDATASET (epnum);
++	writel(dev->int_enable, &regs->int_enable);
++	/* write may still be posted */
++}
++
++static inline void
++pio_irq_disable(struct goku_udc *dev, struct goku_udc_regs *regs, int epnum)
++{
++	dev->int_enable &= ~INT_EPxDATASET (epnum);
++	writel(dev->int_enable, &regs->int_enable);
++	/* write may still be posted */
++}
++
++static inline void
++pio_advance(struct goku_ep *ep)
++{
++	struct goku_request	*req;
++
++	if (unlikely(list_empty (&ep->queue)))
++		return;
++	req = list_entry(ep->queue.next, struct goku_request, queue);
++	(ep->is_in ? write_fifo : read_fifo)(ep, req);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++// return:  0 = q running, 1 = q stopped, negative = errno
++static int start_dma(struct goku_ep *ep, struct goku_request *req)
++{
++	struct goku_udc_regs	*regs = ep->dev->regs;
++	u32			master;
++	u32			start = req->req.dma;
++	u32			end = start + req->req.length - 1;
++
++	master = readl(&regs->dma_master) & MST_RW_BITS;
++
++	/* re-init the bits affecting IN dma; careful with zlps */
++	if (likely(ep->is_in)) {
++		if (unlikely(master & MST_RD_ENA)) {
++			DBG (ep->dev, "start, IN active dma %03x!!\n",
++				master);
++//			return -EL2HLT;
++		}
++		writel(end, &regs->in_dma_end);
++		writel(start, &regs->in_dma_start);
++
++		master &= ~MST_R_BITS;
++		if (unlikely(req->req.length == 0))
++			master = MST_RD_ENA | MST_RD_EOPB;
++		else if ((req->req.length % ep->ep.maxpacket) != 0
++					|| req->req.zero)
++			master = MST_RD_ENA | MST_EOPB_ENA;
++		else
++			master = MST_RD_ENA | MST_EOPB_DIS;
++
++		ep->dev->int_enable |= INT_MSTRDEND;
++
++	/* Goku DMA-OUT merges short packets, which plays poorly with
++	 * protocols where short packets mark the transfer boundaries.
++	 * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
++	 * ending transfers after 3 SOFs; we don't turn it on.
++	 */
++	} else {
++		if (unlikely(master & MST_WR_ENA)) {
++			DBG (ep->dev, "start, OUT active dma %03x!!\n",
++				master);
++//			return -EL2HLT;
++		}
++		writel(end, &regs->out_dma_end);
++		writel(start, &regs->out_dma_start);
++
++		master &= ~MST_W_BITS;
++		master |= MST_WR_ENA | MST_TIMEOUT_DIS;
++
++		ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT;
++	}
++
++	writel(master, &regs->dma_master);
++	writel(ep->dev->int_enable, &regs->int_enable);
++	return 0;
++}
++
++static void dma_advance(struct goku_udc *dev, struct goku_ep *ep)
++{
++	struct goku_request	*req;
++	struct goku_udc_regs	*regs = ep->dev->regs;
++	u32			master;
++
++	master = readl(&regs->dma_master);
++
++	if (unlikely(list_empty(&ep->queue))) {
++stop:
++		if (ep->is_in)
++			dev->int_enable &= ~INT_MSTRDEND;
++		else
++			dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT);
++		writel(dev->int_enable, &regs->int_enable);
++		return;
++	}
++	req = list_entry(ep->queue.next, struct goku_request, queue);
++
++	/* normal hw dma completion (not abort) */
++	if (likely(ep->is_in)) {
++		if (unlikely(master & MST_RD_ENA))
++			return;
++		req->req.actual = readl(&regs->in_dma_current);
++	} else {
++		if (unlikely(master & MST_WR_ENA))
++			return;
++
++		/* hardware merges short packets, and also hides packet
++		 * overruns.  a partial packet MAY be in the fifo here.
++		 */
++		req->req.actual = readl(&regs->out_dma_current);
++	}
++	req->req.actual -= req->req.dma;
++	req->req.actual++;
++
++#ifdef USB_TRACE
++	VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n",
++		ep->ep.name, ep->is_in ? "IN" : "OUT",
++		req->req.actual, req->req.length, req);
++#endif
++	done(ep, req, 0);
++	if (list_empty(&ep->queue))
++		goto stop;
++	req = list_entry(ep->queue.next, struct goku_request, queue);
++	(void) start_dma(ep, req);
++}
++
++static void abort_dma(struct goku_ep *ep, int status)
++{
++	struct goku_udc_regs	*regs = ep->dev->regs;
++	struct goku_request	*req;
++	u32			curr, master;
++
++	/* NAK future host requests, hoping the implicit delay lets the
++	 * dma engine finish reading (or writing) its latest packet and
++	 * empty the dma buffer (up to 16 bytes).
++	 *
++	 * This avoids needing to clean up a partial packet in the fifo;
++	 * we can't do that for IN without side effects to HALT and TOGGLE.
++	 */
++	command(regs, COMMAND_FIFO_DISABLE, ep->num);
++	req = list_entry(ep->queue.next, struct goku_request, queue);
++	master = readl(&regs->dma_master) & MST_RW_BITS;
++
++	/* FIXME using these resets isn't usably documented. this may
++	 * not work unless it's followed by disabling the endpoint.
++	 *
++	 * FIXME the OUT reset path doesn't even behave consistently.
++	 */
++	if (ep->is_in) {
++		if (unlikely((readl(&regs->dma_master) & MST_RD_ENA) == 0))
++			goto finished;
++		curr = readl(&regs->in_dma_current);
++
++		writel(curr, &regs->in_dma_end);
++		writel(curr, &regs->in_dma_start);
++
++		master &= ~MST_R_BITS;
++		master |= MST_RD_RESET;
++		writel(master, &regs->dma_master);
++
++		if (readl(&regs->dma_master) & MST_RD_ENA)
++			DBG(ep->dev, "IN dma active after reset!\n");
++
++	} else {
++		if (unlikely((readl(&regs->dma_master) & MST_WR_ENA) == 0))
++			goto finished;
++		curr = readl(&regs->out_dma_current);
++
++		writel(curr, &regs->out_dma_end);
++		writel(curr, &regs->out_dma_start);
++
++		master &= ~MST_W_BITS;
++		master |= MST_WR_RESET;
++		writel(master, &regs->dma_master);
++
++		if (readl(&regs->dma_master) & MST_WR_ENA)
++			DBG(ep->dev, "OUT dma active after reset!\n");
++	}
++	req->req.actual = (curr - req->req.dma) + 1;
++	req->req.status = status;
++
++	VDBG(ep->dev, "%s %s %s %d/%d\n", __FUNCTION__, ep->ep.name,
++		ep->is_in ? "IN" : "OUT",
++		req->req.actual, req->req.length);
++
++	command(regs, COMMAND_FIFO_ENABLE, ep->num);
++
++	return;
++
++finished:
++	/* dma already completed; no abort needed */
++	command(regs, COMMAND_FIFO_ENABLE, ep->num);
++	req->req.actual = req->req.length;
++	req->req.status = 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static int
++goku_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
++{
++	struct goku_request	*req;
++	struct goku_ep		*ep;
++	struct goku_udc		*dev;
++	unsigned long		flags;
++	int			status;
++
++	/* always require a cpu-view buffer so pio works */
++	req = container_of(_req, struct goku_request, req);
++	if (unlikely(!_req || !_req->complete
++			|| !_req->buf || !list_empty(&req->queue)))
++		return -EINVAL;
++	ep = container_of(_ep, struct goku_ep, ep);
++	if (unlikely(!_ep || (!ep->desc && ep->num != 0)))
++		return -EINVAL;
++	dev = ep->dev;
++	if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
++		return -ESHUTDOWN;
++
++	/* can't touch registers when suspended */
++	if (dev->ep0state == EP0_SUSPEND)
++		return -EBUSY;
++
++	/* set up dma mapping in case the caller didn't */
++	if (ep->dma && _req->dma == DMA_ADDR_INVALID) {
++		_req->dma = pci_map_single(dev->pdev, _req->buf, _req->length,
++			ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
++		req->mapped = 1;
++	}
++
++#ifdef USB_TRACE
++	VDBG(dev, "%s queue req %p, len %u buf %p\n",
++			_ep->name, _req, _req->length, _req->buf);
++#endif
++
++	spin_lock_irqsave(&dev->lock, flags);
++
++	_req->status = -EINPROGRESS;
++	_req->actual = 0;
++
++	/* for ep0 IN without premature status, zlp is required and
++	 * writing EOP starts the status stage (OUT).
++	 */
++	if (unlikely(ep->num == 0 && ep->is_in))
++		_req->zero = 1;
++
++	/* kickstart this i/o queue? */
++	status = 0;
++	if (list_empty(&ep->queue) && likely(!ep->stopped)) {
++		/* dma:  done after dma completion IRQ (or error)
++		 * pio:  done after last fifo operation
++		 */
++		if (ep->dma)
++			status = start_dma(ep, req);
++		else
++			status = (ep->is_in ? write_fifo : read_fifo)(ep, req);
++
++		if (unlikely(status != 0)) {
++			if (status > 0)
++				status = 0;
++			req = 0;
++		}
++
++	} /* else pio or dma irq handler advances the queue. */
++
++	if (likely(req != 0))
++		list_add_tail(&req->queue, &ep->queue);
++
++	if (likely(!list_empty(&ep->queue))
++			&& likely(ep->num != 0)
++			&& !ep->dma
++			&& !(dev->int_enable & INT_EPxDATASET (ep->num)))
++		pio_irq_enable(dev, dev->regs, ep->num);
++
++	spin_unlock_irqrestore(&dev->lock, flags);
++
++	/* pci writes may still be posted */
++	return status;
++}
++
++/* dequeue ALL requests */
++static void nuke(struct goku_ep *ep, int status)
++{
++	struct goku_request	*req;
++
++	ep->stopped = 1;
++	if (list_empty(&ep->queue))
++		return;
++	if (ep->dma)
++		abort_dma(ep, status);
++	while (!list_empty(&ep->queue)) {
++		req = list_entry(ep->queue.next, struct goku_request, queue);
++		done(ep, req, status);
++	}
++}
++
++/* dequeue JUST ONE request */
++static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct goku_request	*req;
++	struct goku_ep		*ep;
++	struct goku_udc		*dev;
++	unsigned long		flags;
++
++	ep = container_of(_ep, struct goku_ep, ep);
++	if (!_ep || !_req || (!ep->desc && ep->num != 0))
++		return -EINVAL;
++	dev = ep->dev;
++	if (!dev->driver)
++		return -ESHUTDOWN;
++
++	/* we can't touch (dma) registers when suspended */
++	if (dev->ep0state == EP0_SUSPEND)
++		return -EBUSY;
++
++	VDBG(dev, "%s %s %s %s %p\n", __FUNCTION__, _ep->name,
++		ep->is_in ? "IN" : "OUT",
++		ep->dma ? "dma" : "pio",
++		_req);
++
++	spin_lock_irqsave(&dev->lock, flags);
++
++	/* make sure it's actually queued on this endpoint */
++	list_for_each_entry (req, &ep->queue, queue) {
++		if (&req->req == _req)
++			break;
++	}
++	if (&req->req != _req) {
++		spin_unlock_irqrestore (&dev->lock, flags);
++		return -EINVAL;
++	}
++
++	if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) {
++		abort_dma(ep, -ECONNRESET);
++		done(ep, req, -ECONNRESET);
++		dma_advance(dev, ep);
++	} else if (!list_empty(&req->queue))
++		done(ep, req, -ECONNRESET);
++	else
++		req = 0;
++	spin_unlock_irqrestore(&dev->lock, flags);
++
++	return req ? 0 : -EOPNOTSUPP;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void goku_clear_halt(struct goku_ep *ep)
++{
++	// assert (ep->num !=0)
++	VDBG(ep->dev, "%s clear halt\n", ep->ep.name);
++	command(ep->dev->regs, COMMAND_SETDATA0, ep->num);
++	command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num);
++	if (ep->stopped) {
++		ep->stopped = 0;
++		if (ep->dma) {
++			struct goku_request	*req;
++
++			if (list_empty(&ep->queue))
++				return;
++			req = list_entry(ep->queue.next, struct goku_request,
++						queue);
++			(void) start_dma(ep, req);
++		} else
++			pio_advance(ep);
++	}
++}
++
++static int goku_set_halt(struct usb_ep *_ep, int value)
++{
++	struct goku_ep	*ep;
++	unsigned long	flags;
++	int		retval = 0;
++
++	if (!_ep)
++		return -ENODEV;
++	ep = container_of (_ep, struct goku_ep, ep);
++
++	if (ep->num == 0) {
++		if (value) {
++			ep->dev->ep0state = EP0_STALL;
++			ep->dev->ep[0].stopped = 1;
++		} else
++			return -EINVAL;
++
++	/* don't change EPxSTATUS_EP_INVALID to READY */
++	} else if (!ep->desc) {
++		DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name);
++		return -EINVAL;
++	}
++
++	spin_lock_irqsave(&ep->dev->lock, flags);
++	if (!list_empty(&ep->queue))
++		retval = -EAGAIN;
++	else if (ep->is_in && value
++			/* data in (either) packet buffer? */
++			&& (ep->dev->regs->DataSet & DATASET_AB(ep->num)))
++		retval = -EAGAIN;
++	else if (!value)
++		goku_clear_halt(ep);
++	else {
++		ep->stopped = 1;
++		VDBG(ep->dev, "%s set halt\n", ep->ep.name);
++		command(ep->dev->regs, COMMAND_STALL, ep->num);
++		readl(ep->reg_status);
++	}
++	spin_unlock_irqrestore(&ep->dev->lock, flags);
++	return retval;
++}
++
++static int goku_fifo_status(struct usb_ep *_ep)
++{
++	struct goku_ep		*ep;
++	struct goku_udc_regs	*regs;
++	u32			size;
++
++	if (!_ep)
++		return -ENODEV;
++	ep = container_of(_ep, struct goku_ep, ep);
++
++	/* size is only reported sanely for OUT */
++	if (ep->is_in)
++		return -EOPNOTSUPP;
++
++	/* ignores 16-byte dma buffer; SizeH == 0 */
++	regs = ep->dev->regs;
++	size = readl(&regs->EPxSizeLA[ep->num]) & DATASIZE;
++	size += readl(&regs->EPxSizeLB[ep->num]) & DATASIZE;
++	VDBG(ep->dev, "%s %s %u\n", __FUNCTION__, ep->ep.name, size);
++	return size;
++}
++
++static void goku_fifo_flush(struct usb_ep *_ep)
++{
++	struct goku_ep		*ep;
++	struct goku_udc_regs	*regs;
++	u32			size;
++
++	if (!_ep)
++		return;
++	ep = container_of(_ep, struct goku_ep, ep);
++	VDBG(ep->dev, "%s %s\n", __FUNCTION__, ep->ep.name);
++
++	/* don't change EPxSTATUS_EP_INVALID to READY */
++	if (!ep->desc && ep->num != 0) {
++		DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name);
++		return;
++	}
++
++	regs = ep->dev->regs;
++	size = readl(&regs->EPxSizeLA[ep->num]);
++	size &= DATASIZE;
++
++	/* Non-desirable behavior:  FIFO_CLEAR also clears the
++	 * endpoint halt feature.  For OUT, we _could_ just read
++	 * the bytes out (PIO, if !ep->dma); for in, no choice.
++	 */
++	if (size)
++		command(regs, COMMAND_FIFO_CLEAR, ep->num);
++}
++
++static struct usb_ep_ops goku_ep_ops = {
++	.enable		= goku_ep_enable,
++	.disable	= goku_ep_disable,
++
++	.alloc_request	= goku_alloc_request,
++	.free_request	= goku_free_request,
++
++	.alloc_buffer	= goku_alloc_buffer,
++	.free_buffer	= goku_free_buffer,
++
++	.queue		= goku_queue,
++	.dequeue	= goku_dequeue,
++
++	.set_halt	= goku_set_halt,
++	.fifo_status	= goku_fifo_status,
++	.fifo_flush	= goku_fifo_flush,
++};
++
++/*-------------------------------------------------------------------------*/
++
++static int goku_get_frame(struct usb_gadget *_gadget)
++{
++	return -EOPNOTSUPP;
++}
++
++static const struct usb_gadget_ops goku_ops = {
++	.get_frame	= goku_get_frame,
++	// no remote wakeup
++	// not selfpowered
++};
++
++/*-------------------------------------------------------------------------*/
++
++static inline char *dmastr(void)
++{
++	if (use_dma == 0)
++		return "(dma disabled)";
++	else if (use_dma == 2)
++		return "(dma IN and OUT)";
++	else
++		return "(dma IN)";
++}
++
++/* if we're trying to save space, don't bother with this proc file */
++
++#if defined(CONFIG_PROC_FS) && !defined(CONFIG_EMBEDDED)
++#  define	UDC_PROC_FILE
++#endif
++
++#ifdef UDC_PROC_FILE
++
++static const char proc_node_name [] = "driver/udc";
++
++#define FOURBITS "%s%s%s%s"
++#define EIGHTBITS FOURBITS FOURBITS
++
++static void
++dump_intmask(const char *label, u32 mask, char **next, unsigned *size)
++{
++	int t;
++
++	/* int_status is the same format ... */
++	t = snprintf(*next, *size,
++		"%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
++		label, mask,
++		(mask & INT_PWRDETECT) ? " power" : "",
++		(mask & INT_SYSERROR) ? " sys" : "",
++		(mask & INT_MSTRDEND) ? " in-dma" : "",
++		(mask & INT_MSTWRTMOUT) ? " wrtmo" : "",
++
++		(mask & INT_MSTWREND) ? " out-dma" : "",
++		(mask & INT_MSTWRSET) ? " wrset" : "",
++		(mask & INT_ERR) ? " err" : "",
++		(mask & INT_SOF) ? " sof" : "",
++
++		(mask & INT_EP3NAK) ? " ep3nak" : "",
++		(mask & INT_EP2NAK) ? " ep2nak" : "",
++		(mask & INT_EP1NAK) ? " ep1nak" : "",
++		(mask & INT_EP3DATASET) ? " ep3" : "",
++
++		(mask & INT_EP2DATASET) ? " ep2" : "",
++		(mask & INT_EP1DATASET) ? " ep1" : "",
++		(mask & INT_STATUSNAK) ? " ep0snak" : "",
++		(mask & INT_STATUS) ? " ep0status" : "",
++
++		(mask & INT_SETUP) ? " setup" : "",
++		(mask & INT_ENDPOINT0) ? " ep0" : "",
++		(mask & INT_USBRESET) ? " reset" : "",
++		(mask & INT_SUSPEND) ? " suspend" : "");
++	*size -= t;
++	*next += t;
++}
++
++
++static int
++udc_proc_read(char *buffer, char **start, off_t off, int count,
++		int *eof, void *_dev)
++{
++	char			*buf = buffer;
++	struct goku_udc		*dev = _dev;
++	struct goku_udc_regs	*regs = dev->regs;
++	char			*next = buf;
++	unsigned		size = count;
++	unsigned long		flags;
++	int			i, t, is_usb_connected;
++	u32			tmp;
++
++	if (off != 0)
++		return 0;
++
++	local_irq_save(flags);
++
++	/* basic device status */
++	tmp = readl(&regs->power_detect);
++	is_usb_connected = tmp & PW_DETECT;
++	t = snprintf(next, size,
++		"%s - %s\n"
++		"%s version: %s %s\n"
++		"Gadget driver: %s\n"
++		"Host %s, %s\n"
++		"\n",
++		pci_name(dev->pdev), driver_desc,
++		driver_name, DRIVER_VERSION, dmastr(),
++		dev->driver ? dev->driver->driver.name : "(none)",
++		is_usb_connected
++			? ((tmp & PW_PULLUP) ? "full speed" : "powered")
++			: "disconnected",
++		({char *tmp;
++		switch(dev->ep0state){
++		case EP0_DISCONNECT:	tmp = "ep0_disconnect"; break;
++		case EP0_IDLE:		tmp = "ep0_idle"; break;
++		case EP0_IN:		tmp = "ep0_in"; break;
++		case EP0_OUT:		tmp = "ep0_out"; break;
++		case EP0_STATUS:	tmp = "ep0_status"; break;
++		case EP0_STALL:		tmp = "ep0_stall"; break;
++		case EP0_SUSPEND:	tmp = "ep0_suspend"; break;
++		default:		tmp = "ep0_?"; break;
++		} tmp; })
++		);
++	size -= t;
++	next += t;
++
++	dump_intmask("int_status", readl(&regs->int_status), &next, &size);
++	dump_intmask("int_enable", readl(&regs->int_enable), &next, &size);
++
++	if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0)
++		goto done;
++
++	/* registers for (active) device and ep0 */
++	t = snprintf(next, size, "\nirqs %lu\ndataset %02x "
++			"single.bcs %02x.%02x state %x addr %u\n",
++			dev->irqs, readl(&regs->DataSet),
++			readl(&regs->EPxSingle), readl(&regs->EPxBCS),
++			readl(&regs->UsbState),
++			readl(&regs->address));
++	size -= t;
++	next += t;
++
++	tmp = readl(&regs->dma_master);
++	t = snprintf(next, size,
++		"dma %03X =" EIGHTBITS "%s %s\n", tmp,
++		(tmp & MST_EOPB_DIS) ? " eopb-" : "",
++		(tmp & MST_EOPB_ENA) ? " eopb+" : "",
++		(tmp & MST_TIMEOUT_DIS) ? " tmo-" : "",
++		(tmp & MST_TIMEOUT_ENA) ? " tmo+" : "",
++
++		(tmp & MST_RD_EOPB) ? " eopb" : "",
++		(tmp & MST_RD_RESET) ? " in_reset" : "",
++		(tmp & MST_WR_RESET) ? " out_reset" : "",
++		(tmp & MST_RD_ENA) ? " IN" : "",
++
++		(tmp & MST_WR_ENA) ? " OUT" : "",
++		(tmp & MST_CONNECTION)
++			? "ep1in/ep2out"
++			: "ep1out/ep2in");
++	size -= t;
++	next += t;
++
++	/* dump endpoint queues */
++	for (i = 0; i < 4; i++) {
++		struct goku_ep		*ep = &dev->ep [i];
++		struct goku_request	*req;
++		int			t;
++
++		if (i && !ep->desc)
++			continue;
++
++		tmp = readl(ep->reg_status);
++		t = snprintf(next, size,
++			"%s %s max %u %s, irqs %lu, "
++			"status %02x (%s) " FOURBITS "\n",
++			ep->ep.name,
++			ep->is_in ? "in" : "out",
++			ep->ep.maxpacket,
++			ep->dma ? "dma" : "pio",
++			ep->irqs,
++			tmp, ({ char *s;
++			switch (tmp & EPxSTATUS_EP_MASK) {
++			case EPxSTATUS_EP_READY:
++				s = "ready"; break;
++			case EPxSTATUS_EP_DATAIN:
++				s = "packet"; break;
++			case EPxSTATUS_EP_FULL:
++				s = "full"; break;
++			case EPxSTATUS_EP_TX_ERR:	// host will retry
++				s = "tx_err"; break;
++			case EPxSTATUS_EP_RX_ERR:
++				s = "rx_err"; break;
++			case EPxSTATUS_EP_BUSY:		/* ep0 only */
++				s = "busy"; break;
++			case EPxSTATUS_EP_STALL:
++				s = "stall"; break;
++			case EPxSTATUS_EP_INVALID:	// these "can't happen"
++				s = "invalid"; break;
++			default:
++				s = "?"; break;
++			}; s; }),
++			(tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0",
++			(tmp & EPxSTATUS_SUSPEND) ? " suspend" : "",
++			(tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "",
++			(tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""
++			);
++		if (t <= 0 || t > size)
++			goto done;
++		size -= t;
++		next += t;
++
++		if (list_empty(&ep->queue)) {
++			t = snprintf(next, size, "\t(nothing queued)\n");
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++			continue;
++		}
++		list_for_each_entry(req, &ep->queue, queue) {
++			if (ep->dma && req->queue.prev == &ep->queue) {
++				if (i == UDC_MSTRD_ENDPOINT)
++					tmp = readl(&regs->in_dma_current);
++				else
++					tmp = readl(&regs->out_dma_current);
++				tmp -= req->req.dma;
++				tmp++;
++			} else
++				tmp = req->req.actual;
++
++			t = snprintf(next, size,
++				"\treq %p len %u/%u buf %p\n",
++				&req->req, tmp, req->req.length,
++				req->req.buf);
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++		}
++	}
++
++done:
++	local_irq_restore(flags);
++	*eof = 1;
++	return count - size;
++}
++
++#endif	/* UDC_PROC_FILE */
++
++/*-------------------------------------------------------------------------*/
++
++static void udc_reinit (struct goku_udc *dev)
++{
++	static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
++	
++	unsigned i;
++
++	INIT_LIST_HEAD (&dev->gadget.ep_list);
++	dev->gadget.ep0 = &dev->ep [0].ep;
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++	dev->ep0state = EP0_DISCONNECT;
++	dev->irqs = 0;
++
++	for (i = 0; i < 4; i++) {
++		struct goku_ep	*ep = &dev->ep[i];
++
++		ep->num = i;
++		ep->ep.name = names[i];
++		ep->reg_fifo = &dev->regs->ep_fifo [i];
++		ep->reg_status = &dev->regs->ep_status [i];
++		ep->reg_mode = &dev->regs->ep_mode[i];
++
++		ep->ep.ops = &goku_ep_ops;
++		list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
++		ep->dev = dev;
++		INIT_LIST_HEAD (&ep->queue);
++
++		ep_reset(0, ep);
++	}
++
++	dev->ep[0].reg_mode = 0;
++	dev->ep[0].ep.maxpacket = MAX_EP0_SIZE;
++	list_del_init (&dev->ep[0].ep.ep_list);
++}
++
++static void udc_reset(struct goku_udc *dev)
++{
++	struct goku_udc_regs	*regs = dev->regs;
++
++	writel(0, &regs->power_detect);
++	writel(0, &regs->int_enable);
++	readl(&regs->int_enable);
++	dev->int_enable = 0;
++
++	/* deassert reset, leave USB D+ at hi-Z (no pullup)
++	 * don't let INT_PWRDETECT sequence begin
++	 */
++	udelay(250);
++	writel(PW_RESETB, &regs->power_detect);
++	readl(&regs->int_enable);
++}
++
++static void ep0_start(struct goku_udc *dev)
++{
++	struct goku_udc_regs	*regs = dev->regs;
++	unsigned		i;
++
++	VDBG(dev, "%s\n", __FUNCTION__);
++
++	udc_reset(dev);
++	udc_reinit (dev);
++	//writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, &regs->dma_master);
++
++	/* hw handles set_address, set_feature, get_status; maybe more */
++	writel(   G_REQMODE_SET_INTF | G_REQMODE_GET_INTF
++		| G_REQMODE_SET_CONF | G_REQMODE_GET_CONF
++		| G_REQMODE_GET_DESC
++		| G_REQMODE_CLEAR_FEAT
++		, &regs->reqmode);
++
++	for (i = 0; i < 4; i++)
++		dev->ep[i].irqs = 0;
++
++	/* can't modify descriptors after writing UsbReady */
++	for (i = 0; i < DESC_LEN; i++)
++		writel(0, &regs->descriptors[i]);
++	writel(0, &regs->UsbReady);
++
++	/* expect ep0 requests when the host drops reset */
++	writel(PW_RESETB | PW_PULLUP, &regs->power_detect);
++	dev->int_enable = INT_DEVWIDE | INT_EP0;
++	writel(dev->int_enable, &dev->regs->int_enable);
++	readl(&regs->int_enable);
++	dev->gadget.speed = USB_SPEED_FULL;
++	dev->ep0state = EP0_IDLE;
++}
++
++static void udc_enable(struct goku_udc *dev)
++{
++	/* start enumeration now, or after power detect irq */
++	if (readl(&dev->regs->power_detect) & PW_DETECT)
++		ep0_start(dev);
++	else {
++		DBG(dev, "%s\n", __FUNCTION__);
++		dev->int_enable = INT_PWRDETECT;
++		writel(dev->int_enable, &dev->regs->int_enable);
++	}
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* keeping it simple:
++ * - one bus driver, initted first;
++ * - one function driver, initted second
++ */
++
++static struct goku_udc	*the_controller;
++
++/* when a driver is successfully registered, it will receive
++ * control requests including set_configuration(), which enables
++ * non-control requests.  then usb traffic follows until a
++ * disconnect is reported.  then a host may connect again, or
++ * the driver might get unbound.
++ */
++int usb_gadget_register_driver(struct usb_gadget_driver *driver)
++{
++	struct goku_udc	*dev = the_controller;
++	int			retval;
++
++	if (!driver
++			|| driver->speed != USB_SPEED_FULL
++			|| !driver->bind
++			|| !driver->unbind
++			|| !driver->disconnect
++			|| !driver->setup)
++		return -EINVAL;
++	if (!dev)
++		return -ENODEV;
++	if (dev->driver)
++		return -EBUSY;
++
++	/* hook up the driver */
++	dev->driver = driver;
++	retval = driver->bind(&dev->gadget);
++	if (retval) {
++		DBG(dev, "bind to driver %s --> error %d\n",
++				driver->driver.name, retval);
++		dev->driver = 0;
++		return retval;
++	}
++
++	/* then enable host detection and ep0; and we're ready
++	 * for set_configuration as well as eventual disconnect.
++	 */
++	udc_enable(dev);
++
++	DBG(dev, "registered gadget driver '%s'\n", driver->driver.name);
++	return 0;
++}
++EXPORT_SYMBOL(usb_gadget_register_driver);
++
++static void
++stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver)
++{
++	unsigned	i;
++
++	DBG (dev, "%s\n", __FUNCTION__);
++
++	if (dev->gadget.speed == USB_SPEED_UNKNOWN)
++		driver = 0;
++
++	/* disconnect gadget driver after quiesceing hw and the driver */
++	udc_reset (dev);
++	for (i = 0; i < 4; i++)
++		nuke(&dev->ep [i], -ESHUTDOWN);
++	if (driver) {
++		spin_unlock(&dev->lock);
++		driver->disconnect(&dev->gadget);
++		spin_lock(&dev->lock);
++	}
++
++	if (dev->driver)
++		udc_enable(dev);
++}
++
++int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
++{
++	struct goku_udc	*dev = the_controller;
++	unsigned long	flags;
++
++	if (!dev)
++		return -ENODEV;
++	if (!driver || driver != dev->driver)
++		return -EINVAL;
++
++	spin_lock_irqsave(&dev->lock, flags);
++	dev->driver = 0;
++	stop_activity(dev, driver);
++	spin_unlock_irqrestore(&dev->lock, flags);
++
++	driver->unbind(&dev->gadget);
++
++	DBG(dev, "unregistered driver '%s'\n", driver->driver.name);
++	return 0;
++}
++EXPORT_SYMBOL(usb_gadget_unregister_driver);
++
++
++/*-------------------------------------------------------------------------*/
++
++static void ep0_setup(struct goku_udc *dev)
++{
++	struct goku_udc_regs	*regs = dev->regs;
++	struct usb_ctrlrequest	ctrl;
++	int			tmp;
++
++	/* read SETUP packet and enter DATA stage */
++	ctrl.bRequestType = readl(&regs->bRequestType);
++	ctrl.bRequest = readl(&regs->bRequest);
++	ctrl.wValue  = (readl(&regs->wValueH)  << 8) | readl(&regs->wValueL);
++	ctrl.wIndex  = (readl(&regs->wIndexH)  << 8) | readl(&regs->wIndexL);
++	ctrl.wLength = (readl(&regs->wLengthH) << 8) | readl(&regs->wLengthL);
++	writel(0, &regs->SetupRecv);
++
++	nuke(&dev->ep[0], 0);
++	dev->ep[0].stopped = 0;
++	if (likely(ctrl.bRequestType & USB_DIR_IN)) {
++		dev->ep[0].is_in = 1;
++		dev->ep0state = EP0_IN;
++		/* detect early status stages */
++		writel(ICONTROL_STATUSNAK, &dev->regs->IntControl);
++	} else {
++		dev->ep[0].is_in = 0;
++		dev->ep0state = EP0_OUT;
++
++		/* NOTE:  CLEAR_FEATURE is done in software so that we can
++		 * synchronize transfer restarts after bulk IN stalls.  data
++		 * won't even enter the fifo until the halt is cleared.
++		 */
++		switch (ctrl.bRequest) {
++		case USB_REQ_CLEAR_FEATURE:
++			switch (ctrl.bRequestType) {
++			case USB_RECIP_ENDPOINT:
++				tmp = ctrl.wIndex & 0x0f;
++				/* active endpoint */
++				if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0))
++					goto stall;
++				if (ctrl.wIndex & USB_DIR_IN) {
++					if (!dev->ep[tmp].is_in)
++						goto stall;
++				} else {
++					if (dev->ep[tmp].is_in)
++						goto stall;
++				}
++				/* endpoint halt */
++				if (ctrl.wValue != 0)
++					goto stall;
++				if (tmp)
++					goku_clear_halt(&dev->ep[tmp]);
++succeed:
++				/* start ep0out status stage */
++				writel(~(1<<0), &regs->EOP);
++				dev->ep[0].stopped = 1;
++				dev->ep0state = EP0_STATUS;
++				return;
++			case USB_RECIP_DEVICE:
++				/* device remote wakeup: always clear */
++				if (ctrl.wValue != 1)
++					goto stall;
++				VDBG(dev, "clear dev remote wakeup\n");
++				goto succeed;
++			case USB_RECIP_INTERFACE:
++				goto stall;
++			default:		/* pass to gadget driver */
++				break;
++			}
++			break;
++		default:
++			break;
++		}
++	}
++
++#ifdef USB_TRACE
++	VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
++		ctrl.bRequestType, ctrl.bRequest,
++		ctrl.wValue, ctrl.wIndex, ctrl.wLength);
++#endif
++
++	/* hw wants to know when we're configured (or not) */
++	dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION
++				&& ctrl.bRequestType == USB_RECIP_DEVICE);
++	if (unlikely(dev->req_config))
++		dev->configured = (ctrl.wValue != 0);
++
++	/* delegate everything to the gadget driver.
++	 * it may respond after this irq handler returns.
++	 */
++	spin_unlock (&dev->lock);
++	tmp = dev->driver->setup(&dev->gadget, &ctrl);
++	spin_lock (&dev->lock);
++	if (unlikely(tmp < 0)) {
++stall:
++#ifdef USB_TRACE
++		VDBG(dev, "req %02x.%02x protocol STALL; err %d\n",
++				ctrl.bRequestType, ctrl.bRequest, tmp);
++#endif
++		command(regs, COMMAND_STALL, 0);
++		dev->ep[0].stopped = 1;
++		dev->ep0state = EP0_STALL;
++	}
++
++	/* expect at least one data or status stage irq */
++}
++
++#define ACK(irqbit) { \
++		stat &= ~irqbit; \
++		writel(~irqbit, &regs->int_status); \
++		handled = 1; \
++		}
++
++static irqreturn_t goku_irq(int irq, void *_dev, struct pt_regs *r)
++{
++	struct goku_udc		*dev = _dev;
++	struct goku_udc_regs	*regs = dev->regs;
++	struct goku_ep		*ep;
++	u32			stat, handled = 0;
++	unsigned		i, rescans = 5;
++
++	spin_lock(&dev->lock);
++
++rescan:
++	stat = readl(&regs->int_status) & dev->int_enable;
++        if (!stat)
++		goto done;
++	dev->irqs++;
++
++	/* device-wide irqs */
++	if (unlikely(stat & INT_DEVWIDE)) {
++		if (stat & INT_SYSERROR) {
++			ERROR(dev, "system error\n");
++			stop_activity(dev, dev->driver);
++			stat = 0;
++			handled = 1;
++			// FIXME have a neater way to prevent re-enumeration
++			dev->driver = 0;
++			goto done;
++		}
++		if (stat & INT_PWRDETECT) {
++			writel(~stat, &regs->int_status);
++			if (readl(&dev->regs->power_detect) & PW_DETECT) {
++				VDBG(dev, "connect\n");
++				ep0_start(dev);
++			} else {
++				DBG(dev, "disconnect\n");
++				if (dev->gadget.speed == USB_SPEED_FULL)
++					stop_activity(dev, dev->driver);
++				dev->ep0state = EP0_DISCONNECT;
++				dev->int_enable = INT_DEVWIDE;
++				writel(dev->int_enable, &dev->regs->int_enable);
++			}
++			stat = 0;
++			handled = 1;
++			goto done;
++		}
++		if (stat & INT_SUSPEND) {
++			ACK(INT_SUSPEND);
++			if (readl(&regs->ep_status[0]) & EPxSTATUS_SUSPEND) {
++				switch (dev->ep0state) {
++				case EP0_DISCONNECT:
++				case EP0_SUSPEND:
++					goto pm_next;
++				default:
++					break;
++				}
++				DBG(dev, "USB suspend\n");
++				dev->ep0state = EP0_SUSPEND;
++				if (dev->gadget.speed != USB_SPEED_UNKNOWN
++						&& dev->driver
++						&& dev->driver->suspend) {
++					spin_unlock(&dev->lock);
++					dev->driver->suspend(&dev->gadget);
++					spin_lock(&dev->lock);
++				}
++			} else {
++				if (dev->ep0state != EP0_SUSPEND) {
++					DBG(dev, "bogus USB resume %d\n",
++						dev->ep0state);
++					goto pm_next;
++				}
++				DBG(dev, "USB resume\n");
++				dev->ep0state = EP0_IDLE;
++				if (dev->gadget.speed != USB_SPEED_UNKNOWN
++						&& dev->driver
++						&& dev->driver->resume) {
++					spin_unlock(&dev->lock);
++					dev->driver->resume(&dev->gadget);
++					spin_lock(&dev->lock);
++				}
++			}
++		}
++pm_next:
++		if (stat & INT_USBRESET) {		/* hub reset done */
++			ACK(INT_USBRESET);
++			INFO(dev, "USB reset done, gadget %s\n",
++				dev->driver->driver.name);
++		}
++		// and INT_ERR on some endpoint's crc/bitstuff/... problem
++	}
++
++	/* progress ep0 setup, data, or status stages.
++	 * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
++	 */
++	if (stat & INT_SETUP) {
++		ACK(INT_SETUP);
++		dev->ep[0].irqs++;
++		ep0_setup(dev);
++	}
++        if (stat & INT_STATUSNAK) {
++		ACK(INT_STATUSNAK|INT_ENDPOINT0);
++		if (dev->ep0state == EP0_IN) {
++			ep = &dev->ep[0];
++			ep->irqs++;
++			nuke(ep, 0);
++			writel(~(1<<0), &regs->EOP);
++			dev->ep0state = EP0_STATUS;
++		}
++	}
++        if (stat & INT_ENDPOINT0) {
++		ACK(INT_ENDPOINT0);
++		ep = &dev->ep[0];
++		ep->irqs++;
++		pio_advance(ep);
++        }
++
++	/* dma completion */
++        if (stat & INT_MSTRDEND) {	/* IN */
++		ACK(INT_MSTRDEND);
++		ep = &dev->ep[UDC_MSTRD_ENDPOINT];
++		ep->irqs++;
++		dma_advance(dev, ep);
++        }
++        if (stat & INT_MSTWREND) {	/* OUT */
++		ACK(INT_MSTWREND);
++		ep = &dev->ep[UDC_MSTWR_ENDPOINT];
++		ep->irqs++;
++		dma_advance(dev, ep);
++        }
++        if (stat & INT_MSTWRTMOUT) {	/* OUT */
++		ACK(INT_MSTWRTMOUT);
++		ep = &dev->ep[UDC_MSTWR_ENDPOINT];
++		ep->irqs++;
++		ERROR(dev, "%s write timeout ?\n", ep->ep.name);
++		// reset dma? then dma_advance()
++        }
++
++	/* pio */
++	for (i = 1; i < 4; i++) {
++		u32		tmp = INT_EPxDATASET(i);
++
++		if (!(stat & tmp))
++			continue;
++		ep = &dev->ep[i];
++		pio_advance(ep);
++		if (list_empty (&ep->queue))
++			pio_irq_disable(dev, regs, i);
++		stat &= ~tmp;
++		handled = 1;
++		ep->irqs++;
++	}
++
++	if (rescans--)
++		goto rescan;
++
++done:
++	(void)readl(&regs->int_enable);
++	spin_unlock(&dev->lock);
++	if (stat)
++		DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat,
++				readl(&regs->int_status), dev->int_enable);
++	return IRQ_RETVAL(handled);
++}
++
++#undef ACK
++
++/*-------------------------------------------------------------------------*/
++
++/* tear down the binding between this driver and the pci device */
++
++static void goku_remove(struct pci_dev *pdev)
++{
++	struct goku_udc		*dev = pci_get_drvdata(pdev);
++
++	DBG(dev, "%s\n", __FUNCTION__);
++	/* start with the driver above us */
++	if (dev->driver) {
++		/* should have been done already by driver model core */
++		WARN(dev, "pci remove, driver '%s' is still registered\n",
++				dev->driver->driver.name);
++		usb_gadget_unregister_driver(dev->driver);
++	}
++
++#ifdef	UDC_PROC_FILE
++	remove_proc_entry(proc_node_name, NULL);
++#endif
++	if (dev->regs)
++		udc_reset(dev);
++	if (dev->got_irq)
++		free_irq(pdev->irq, dev);
++	if (dev->regs)
++		iounmap(dev->regs);
++	if (dev->got_region)
++		release_mem_region(pci_resource_start (pdev, 0),
++				pci_resource_len (pdev, 0));
++	if (dev->enabled)
++		pci_disable_device(pdev);
++
++	pci_set_drvdata(pdev, 0);
++	dev->regs = 0;
++	the_controller = 0;
++
++	INFO(dev, "unbind\n");
++}
++
++/* wrap this driver around the specified pci device, but
++ * don't respond over USB until a gadget driver binds to us.
++ */
++
++static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
++{
++	struct goku_udc		*dev = 0;
++	unsigned long		resource, len;
++	void			*base = 0;
++	int			retval;
++	char			buf [8], *bufp;
++
++	/* if you want to support more than one controller in a system,
++	 * usb_gadget_driver_{register,unregister}() must change.
++	 */
++	if (the_controller) {
++		WARN(dev, "ignoring %s\n", pci_name(pdev));
++		return -EBUSY;
++	}
++	if (!pdev->irq) {
++		printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev));
++		retval = -ENODEV;
++		goto done;
++	}
++
++	/* alloc, and start init */
++	dev = kmalloc (sizeof *dev, SLAB_KERNEL);
++	if (dev == NULL){
++		pr_debug("enomem %s\n", pci_name(pdev));
++		retval = -ENOMEM;
++		goto done;
++	}
++
++	memset(dev, 0, sizeof *dev);
++	spin_lock_init(&dev->lock);
++	dev->pdev = pdev;
++	dev->gadget.ops = &goku_ops;
++
++	/* the "gadget" abstracts/virtualizes the controller */
++	dev->gadget.dev.bus_id = "gadget";
++	dev->gadget.name = driver_name;
++
++	/* now all the pci goodies ... */
++	retval = pci_enable_device(pdev);
++	if (retval < 0) {
++		DBG(dev, "can't enable, %d\n", retval);
++		goto done;
++	}
++	dev->enabled = 1;
++
++	resource = pci_resource_start(pdev, 0);
++	len = pci_resource_len(pdev, 0);
++	if (!request_mem_region(resource, len, driver_name)) {
++		DBG(dev, "controller already in use\n");
++		retval = -EBUSY;
++		goto done;
++	}
++	dev->got_region = 1;
++
++	base = ioremap_nocache(resource, len);
++	if (base == NULL) {
++		DBG(dev, "can't map memory\n");
++		retval = -EFAULT;
++		goto done;
++	}
++	dev->regs = (struct goku_udc_regs *) base;
++
++	pci_set_drvdata(pdev, dev);
++	INFO(dev, "%s\n", driver_desc);
++	INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr());
++#ifndef __sparc__
++	snprintf(buf, sizeof buf, "%d", pdev->irq);
++	bufp = buf;
++#else
++	bufp = __irq_itoa(pdev->irq);
++#endif
++	INFO(dev, "irq %s, pci mem %p\n", bufp, base);
++
++	/* init to known state, then setup irqs */
++	udc_reset(dev);
++	udc_reinit (dev);
++	if (request_irq(pdev->irq, goku_irq, SA_SHIRQ/*|SA_SAMPLE_RANDOM*/,
++			driver_name, dev) != 0) {
++		DBG(dev, "request interrupt %s failed\n", bufp);
++		retval = -EBUSY;
++		goto done;
++	}
++	dev->got_irq = 1;
++	if (use_dma)
++		pci_set_master(pdev);
++
++
++#ifdef	UDC_PROC_FILE
++	create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev);
++#endif
++
++	/* done */
++	the_controller = dev;
++
++	return 0;
++
++done:
++	if (dev)
++		goku_remove (pdev);
++	return retval;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static struct pci_device_id pci_ids [] = { {
++	.class = 	((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
++	.class_mask = 	~0,
++	.vendor =	0x102f,		/* Toshiba */
++	.device =	0x0107,		/* this UDC */
++	.subvendor =	PCI_ANY_ID,
++	.subdevice =	PCI_ANY_ID,
++
++}, { /* end: all zeroes */ }
++};
++MODULE_DEVICE_TABLE (pci, pci_ids);
++
++static struct pci_driver goku_pci_driver = {
++	.name =		(char *) driver_name,
++	.id_table =	pci_ids,
++
++	.probe =	goku_probe,
++	.remove =	goku_remove,
++
++	/* FIXME add power management support */
++};
++
++static int __init init (void)
++{
++	return pci_module_init (&goku_pci_driver);
++}
++module_init (init);
++
++static void __exit cleanup (void)
++{
++	pci_unregister_driver (&goku_pci_driver);
++}
++module_exit (cleanup);
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/goku_udc.h kernel/drivers/usb/gadget/goku_udc.h
+--- /tmp/kernel/drivers/usb/gadget/goku_udc.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/goku_udc.h	2005-04-22 17:53:19.443538050 +0200
+@@ -0,0 +1,321 @@
++/*
++ * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
++ *
++ * Copyright (C) 2000-2002 Lineo
++ *      by Stuart Lynne, Tom Rushworth, and Bruce Balden
++ * Copyright (C) 2002 Toshiba Corporation
++ * Copyright (C) 2003 MontaVista Software (source@mvista.com)
++ *
++ * This file is licensed under the terms of the GNU General Public
++ * License version 2.  This program is licensed "as is" without any
++ * warranty of any kind, whether express or implied.
++ */
++
++/*
++ * PCI BAR 0 points to these registers.
++ */
++struct goku_udc_regs {
++	/* irq management */
++	u32	int_status;		/* 0x000 */
++	u32	int_enable;
++#define INT_SUSPEND		0x00001		/* or resume */
++#define INT_USBRESET		0x00002
++#define INT_ENDPOINT0		0x00004
++#define INT_SETUP		0x00008
++#define INT_STATUS		0x00010
++#define INT_STATUSNAK		0x00020
++#define INT_EPxDATASET(n)	(0x00020 << (n))	/* 0 < n < 4 */
++#	define INT_EP1DATASET		0x00040
++#	define INT_EP2DATASET		0x00080
++#	define INT_EP3DATASET		0x00100
++#define INT_EPnNAK(n)		(0x00100 < (n))		/* 0 < n < 4 */
++#	define INT_EP1NAK		0x00200
++#	define INT_EP2NAK		0x00400
++#	define INT_EP3NAK		0x00800
++#define INT_SOF			0x01000
++#define INT_ERR			0x02000
++#define INT_MSTWRSET		0x04000
++#define INT_MSTWREND		0x08000
++#define INT_MSTWRTMOUT		0x10000
++#define INT_MSTRDEND		0x20000
++#define INT_SYSERROR		0x40000
++#define INT_PWRDETECT		0x80000
++
++#define	INT_DEVWIDE		(INT_PWRDETECT|INT_SYSERROR/*|INT_ERR*/|INT_USBRESET|INT_SUSPEND)
++#define	INT_EP0 		(INT_SETUP|INT_ENDPOINT0/*|INT_STATUS*/|INT_STATUSNAK)
++
++	u32	dma_master;
++#define MST_EOPB_DIS		0x0800
++#define MST_EOPB_ENA		0x0400
++#define MST_TIMEOUT_DIS		0x0200
++#define MST_TIMEOUT_ENA		0x0100
++#define MST_RD_EOPB		0x0080		/* write-only */
++#define MST_RD_RESET		0x0040
++#define MST_WR_RESET		0x0020
++#define MST_RD_ENA		0x0004		/* 1:start, 0:ignore */
++#define MST_WR_ENA		0x0002		/* 1:start, 0:ignore */
++#define MST_CONNECTION		0x0001		/* 0 for ep1out/ep2in */
++
++#define MST_R_BITS		(MST_EOPB_DIS|MST_EOPB_ENA \
++					|MST_RD_ENA|MST_RD_RESET)
++#define MST_W_BITS		(MST_TIMEOUT_DIS|MST_TIMEOUT_ENA \
++					|MST_WR_ENA|MST_WR_RESET)
++#define MST_RW_BITS		(MST_R_BITS|MST_W_BITS \
++					|MST_CONNECTION)
++
++/* these values assume (dma_master & MST_CONNECTION) == 0 */
++#define UDC_MSTWR_ENDPOINT        1
++#define UDC_MSTRD_ENDPOINT        2
++
++	/* dma master write */
++	u32	out_dma_start;
++	u32	out_dma_end;
++	u32	out_dma_current;
++
++	/* dma master read */
++	u32	in_dma_start;
++	u32	in_dma_end;
++	u32	in_dma_current;
++
++	u32	power_detect;
++#define PW_DETECT		0x04
++#define PW_RESETB		0x02
++#define PW_PULLUP		0x01
++
++	u8	_reserved0 [0x1d8];
++
++	/* endpoint registers */
++	u32	ep_fifo [4];		/* 0x200 */
++	u8	_reserved1 [0x10];
++	u32	ep_mode [4];		/* only 1-3 valid */
++	u8	_reserved2 [0x10];
++
++	u32	ep_status [4];
++#define EPxSTATUS_TOGGLE	0x40
++#define EPxSTATUS_SUSPEND	0x20
++#define EPxSTATUS_EP_MASK	(0x07<<2)
++#	define EPxSTATUS_EP_READY	(0<<2)
++#	define EPxSTATUS_EP_DATAIN	(1<<2)
++#	define EPxSTATUS_EP_FULL	(2<<2)
++#	define EPxSTATUS_EP_TX_ERR	(3<<2)
++#	define EPxSTATUS_EP_RX_ERR	(4<<2)
++#	define EPxSTATUS_EP_BUSY	(5<<2)
++#	define EPxSTATUS_EP_STALL	(6<<2)
++#	define EPxSTATUS_EP_INVALID	(7<<2)
++#define EPxSTATUS_FIFO_DISABLE	0x02
++#define EPxSTATUS_STAGE_ERROR	0x01
++
++	u8	_reserved3 [0x10];
++	u32	EPxSizeLA[4];
++#define PACKET_ACTIVE		(1<<7)
++#define DATASIZE		0x7f
++	u8	_reserved3a [0x10];
++	u32	EPxSizeLB[4];		/* only 1,2 valid */
++	u8	_reserved3b [0x10];
++	u32	EPxSizeHA[4];		/* only 1-3 valid */
++	u8	_reserved3c [0x10];
++	u32	EPxSizeHB[4];		/* only 1,2 valid */
++	u8	_reserved4[0x30];
++
++	/* SETUP packet contents */
++	u32	bRequestType;		/* 0x300 */
++	u32	bRequest;
++	u32	wValueL;
++	u32	wValueH;
++	u32	wIndexL;
++	u32	wIndexH;
++	u32	wLengthL;
++	u32	wLengthH;
++
++	/* command interaction/handshaking */
++	u32	SetupRecv;		/* 0x320 */
++	u32	CurrConfig;
++	u32	StdRequest;
++	u32	Request;
++	u32	DataSet;
++#define DATASET_A(epnum)	(1<<(2*(epnum)))
++#define DATASET_B(epnum)	(2<<(2*(epnum)))
++#define DATASET_AB(epnum)	(3<<(2*(epnum)))
++	u8	_reserved5[4];
++
++	u32	UsbState;
++#define USBSTATE_CONFIGURED	0x04
++#define USBSTATE_ADDRESSED	0x02
++#define USBSTATE_DEFAULT	0x01
++
++	u32	EOP;
++
++	u32	Command;		/* 0x340 */
++#define COMMAND_SETDATA0	2
++#define COMMAND_RESET		3
++#define COMMAND_STALL		4
++#define COMMAND_INVALID		5
++#define COMMAND_FIFO_DISABLE	7
++#define COMMAND_FIFO_ENABLE	8
++#define COMMAND_INIT_DESCRIPTOR	9
++#define COMMAND_FIFO_CLEAR	10	/* also stall */
++#define COMMAND_STALL_CLEAR	11
++#define COMMAND_EP(n)		((n) << 4)
++
++	u32	EPxSingle;
++	u8	_reserved6[4];
++	u32	EPxBCS;
++	u8	_reserved7[8];
++	u32	IntControl;
++#define ICONTROL_STATUSNAK	1
++	u8	_reserved8[4];
++
++	u32	reqmode;	// 0x360 standard request mode, low 8 bits
++#define G_REQMODE_SET_INTF	(1<<7)
++#define G_REQMODE_GET_INTF	(1<<6)
++#define G_REQMODE_SET_CONF	(1<<5)
++#define G_REQMODE_GET_CONF	(1<<4)
++#define G_REQMODE_GET_DESC	(1<<3)
++#define G_REQMODE_SET_FEAT	(1<<2)
++#define G_REQMODE_CLEAR_FEAT	(1<<1)
++#define G_REQMODE_GET_STATUS	(1<<0)
++
++	u32	ReqMode;
++	u8	_reserved9[0x18];
++	u32	PortStatus;		/* 0x380 */
++	u8	_reserved10[8];
++	u32	address;
++	u32	buff_test;
++	u8	_reserved11[4];
++	u32	UsbReady;
++	u8	_reserved12[4];
++	u32	SetDescStall;		/* 0x3a0 */
++	u8	_reserved13[0x45c];
++
++	/* hardware could handle limited GET_DESCRIPTOR duties */
++#define	DESC_LEN	0x80
++	u32	descriptors[DESC_LEN];	/* 0x800 */
++	u8	_reserved14[0x600];
++
++} __attribute__ ((packed));
++
++#define	MAX_FIFO_SIZE	64
++#define	MAX_EP0_SIZE	8		/* ep0 fifo is bigger, though */
++
++
++/*-------------------------------------------------------------------------*/
++
++/* DRIVER DATA STRUCTURES and UTILITIES */
++
++struct goku_ep {
++	struct usb_ep				ep;
++	struct goku_udc				*dev;
++	unsigned long				irqs;
++
++	unsigned				num:8,
++						dma:1,
++						is_in:1,
++						stopped:1;
++
++	/* analogous to a host-side qh */
++	struct list_head			queue;
++	const struct usb_endpoint_descriptor	*desc;
++
++	u32					*reg_fifo;
++	u32					*reg_mode;
++	u32					*reg_status;
++};
++
++struct goku_request {
++	struct usb_request		req;
++	struct list_head		queue;
++
++	unsigned			mapped:1;
++};
++
++enum ep0state {
++	EP0_DISCONNECT,		/* no host */
++	EP0_IDLE,		/* between STATUS ack and SETUP report */
++	EP0_IN, EP0_OUT, 	/* data stage */
++	EP0_STATUS,		/* status stage */
++	EP0_STALL,		/* data or status stages */
++	EP0_SUSPEND,		/* usb suspend */
++};
++
++struct goku_udc {
++	/* each pci device provides one gadget, several endpoints */
++	struct usb_gadget		gadget;
++	spinlock_t			lock;
++	struct goku_ep			ep[4];
++	struct usb_gadget_driver 	*driver;
++
++	enum ep0state			ep0state;
++	unsigned			got_irq:1,
++					got_region:1,
++					req_config:1,
++					configured:1,
++					enabled:1;
++
++	/* pci state used to access those endpoints */
++	struct pci_dev			*pdev;
++	struct goku_udc_regs		*regs;
++	u32				int_enable;
++
++	/* statistics... */
++	unsigned long			irqs;
++};
++
++/*-------------------------------------------------------------------------*/
++
++#define xprintk(dev,level,fmt,args...) \
++	printk(level "%s %s: " fmt , driver_name , \
++			pci_name(dev->pdev) , ## args)
++
++#ifdef DEBUG
++#define DBG(dev,fmt,args...) \
++	xprintk(dev , KERN_DEBUG , fmt , ## args)
++#else
++#define DBG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* DEBUG */
++
++#ifdef VERBOSE
++#define VDBG DBG
++#else
++#define VDBG(dev,fmt,args...) \
++	do { } while (0)
++#endif	/* VERBOSE */
++
++#define ERROR(dev,fmt,args...) \
++	xprintk(dev , KERN_ERR , fmt , ## args)
++#define WARN(dev,fmt,args...) \
++	xprintk(dev , KERN_WARNING , fmt , ## args)
++#define INFO(dev,fmt,args...) \
++	xprintk(dev , KERN_INFO , fmt , ## args)
++
++/*-------------------------------------------------------------------------*/
++
++/* 2.5 stuff that's sometimes missing in 2.4 */
++
++#ifndef container_of
++#define	container_of	list_entry
++#endif
++
++#ifndef likely
++#define likely(x)	(x)
++#define unlikely(x)	(x)
++#endif
++
++#ifndef BUG_ON
++#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
++#endif
++
++#ifndef WARN_ON
++#define	WARN_ON(x)	do { } while (0)
++#endif
++
++#ifndef	IRQ_NONE
++typedef void irqreturn_t;
++#define IRQ_NONE
++#define IRQ_HANDLED
++#define IRQ_RETVAL(x)
++#endif
++
++#ifndef pci_name
++#define pci_name(pdev)	((pdev)->slot_name)
++#endif
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/gserial.c kernel/drivers/usb/gadget/gserial.c
+--- /tmp/kernel/drivers/usb/gadget/gserial.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/gserial.c	2005-04-22 17:53:19.450536911 +0200
+@@ -0,0 +1,2301 @@
++/*
++ * g_serial.c -- USB gadget serial driver
++ *
++ * $Id: gserial.c,v 1.17 2003/10/01 06:31:57 borchers Exp $
++ *
++ * Copyright 2003 (c) Al Borchers (alborchers@steinerpoint.com)
++ *
++ * This code is based in part on the Gadget Zero driver, which
++ * is Copyright (C) 2003 by David Brownell, all rights reserved.
++ *
++ * This code also borrows from usbserial.c, which is
++ * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
++ * Copyright (c) 2000 Peter Berger (pberger@brimson.com)
++ * Copyright (c) 2000 Al Borchers (alborchers@steinerpoint.com)
++ *
++ * This software is distributed under the terms of the GNU General
++ * Public License ("GPL") as published by the Free Software Foundation,
++ * either version 2 of that License or (at your option) any later version.
++ *
++ */
++
++#ifndef __KERNEL__
++#define __KERNEL__
++#endif
++
++#ifndef MODULE
++#define MODULE
++#endif
++
++
++/* Includes */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/delay.h>
++#include <linux/ioport.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/smp_lock.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++#include <linux/uts.h>
++#include <linux/version.h>
++#include <linux/wait.h>
++#include <linux/list.h>
++#include <linux/proc_fs.h>
++#include <linux/tty_flip.h>
++
++#include <asm/byteorder.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/unaligned.h>
++#include <asm/uaccess.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include "gadget_chips.h"
++
++
++/* Wait Cond */
++
++#define __wait_cond_interruptible(wq, condition, lock, flags, ret)	\
++do {									\
++	wait_queue_t __wait;						\
++	init_waitqueue_entry(&__wait, current);				\
++									\
++	add_wait_queue(&wq, &__wait);					\
++	for (;;) {							\
++		set_current_state(TASK_INTERRUPTIBLE);			\
++		if (condition)						\
++			break;						\
++		if (!signal_pending(current)) {				\
++			spin_unlock_irqrestore(lock, flags);		\
++			schedule();					\
++			spin_lock_irqsave(lock, flags);			\
++			continue;					\
++		}							\
++		ret = -ERESTARTSYS;					\
++		break;							\
++	}								\
++	current->state = TASK_RUNNING;					\
++	remove_wait_queue(&wq, &__wait);				\
++} while (0)
++	
++#define wait_cond_interruptible(wq, condition, lock, flags)		\
++({									\
++	int __ret = 0;							\
++	if (!(condition))						\
++		__wait_cond_interruptible(wq, condition, lock, flags,	\
++						__ret);			\
++	__ret;								\
++})
++
++#define __wait_cond_interruptible_timeout(wq, condition, lock, flags, 	\
++						timeout, ret)		\
++do {									\
++	signed long __timeout = timeout;				\
++	wait_queue_t __wait;						\
++	init_waitqueue_entry(&__wait, current);				\
++									\
++	add_wait_queue(&wq, &__wait);					\
++	for (;;) {							\
++		set_current_state(TASK_INTERRUPTIBLE);			\
++		if (__timeout == 0)					\
++			break;						\
++		if (condition)						\
++			break;						\
++		if (!signal_pending(current)) {				\
++			spin_unlock_irqrestore(lock, flags);		\
++			__timeout = schedule_timeout(__timeout);	\
++			spin_lock_irqsave(lock, flags);			\
++			continue;					\
++		}							\
++		ret = -ERESTARTSYS;					\
++		break;							\
++	}								\
++	current->state = TASK_RUNNING;					\
++	remove_wait_queue(&wq, &__wait);				\
++} while (0)
++	
++#define wait_cond_interruptible_timeout(wq, condition, lock, flags,	\
++						timeout)		\
++({									\
++	int __ret = 0;							\
++	if (!(condition))						\
++		__wait_cond_interruptible_timeout(wq, condition, lock,	\
++						flags, timeout, __ret);	\
++	__ret;								\
++})
++
++
++/* Defines */
++
++#define GS_VERSION_STR			"v1.0"
++#define GS_VERSION_NUM			0x0100
++
++#define GS_LONG_NAME			"Gadget Serial"
++#define GS_SHORT_NAME			"g_serial"
++
++#define GS_MAJOR			127
++#define GS_MINOR_START			0
++
++#define GS_NUM_PORTS			16
++
++#define GS_NUM_CONFIGS			1
++#define GS_NO_CONFIG_ID			0
++#define GS_BULK_CONFIG_ID		2
++
++#define GS_NUM_INTERFACES		1
++#define GS_INTERFACE_ID			0
++#define GS_ALT_INTERFACE_ID		0
++
++#define GS_NUM_ENDPOINTS		2
++
++#define GS_MAX_DESC_LEN			256
++
++#define GS_DEFAULT_READ_Q_SIZE		32
++#define GS_DEFAULT_WRITE_Q_SIZE		32
++
++#define GS_DEFAULT_WRITE_BUF_SIZE	8192
++#define GS_TMP_BUF_SIZE			8192
++
++#define GS_CLOSE_TIMEOUT		15
++
++/* debug macro */
++#if G_SERIAL_DEBUG
++
++static int debug = G_SERIAL_DEBUG;
++
++#define gs_debug(format, arg...) \
++	do { if(debug) printk( KERN_DEBUG format, ## arg ); } while(0)
++#define gs_debug_level(level, format, arg...) \
++	do { if(debug>=level) printk( KERN_DEBUG format, ## arg ); } while(0)
++
++#else
++
++#define gs_debug(format, arg...) \
++	do { } while(0)
++#define gs_debug_level(level, format, arg...) \
++	do { } while(0)
++
++#endif /* G_SERIAL_DEBUG */
++
++
++/* Thanks to NetChip Technologies for donating this product ID.
++ *
++ * DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
++ * Instead:  allocate your own, using normal USB-IF procedures.
++ */
++#define GS_VENDOR_ID	0x0525		/* NetChip */
++#define GS_PRODUCT_ID	0xa4a6		/* Linux-USB Serial Gadget */
++
++
++/* Structures */
++
++struct gs_dev;
++
++/* circular buffer */
++struct gs_buf {
++	unsigned int		buf_size;
++	char			*buf_buf;
++	char			*buf_get;
++	char			*buf_put;
++};
++
++/* list of requests */
++struct gs_req_entry {
++	struct list_head	re_entry;
++	struct usb_request	*re_req;
++};
++
++/* the port structure holds info for each port, one for each minor number */
++struct gs_port {
++	struct gs_dev 		*port_dev;	/* pointer to device struct */
++	struct tty_struct	*port_tty;	/* pointer to tty struct */
++	spinlock_t		port_lock;
++	int 			port_num;
++	int			port_open_count;
++	int			port_in_use;	/* open/close in progress */
++	wait_queue_head_t	port_write_wait;/* waiting to write */
++	struct gs_buf		*port_write_buf;
++};
++
++/* the device structure holds info for the USB device */
++struct gs_dev {
++	struct usb_gadget	*dev_gadget;	/* gadget device pointer */
++	spinlock_t		dev_lock;	/* lock for set/reset config */
++	int			dev_config;	/* configuration number */
++	struct usb_ep		*dev_in_ep;	/* address of in endpoint */
++	struct usb_ep		*dev_out_ep;	/* address of out endpoint */
++	struct usb_request	*dev_ctrl_req;	/* control request */
++	struct list_head	dev_req_list;	/* list of write requests */
++	int			dev_sched_port;	/* round robin port scheduled */
++	struct gs_port		*dev_port[GS_NUM_PORTS]; /* the ports */
++};
++
++
++/* Functions */
++
++/* module */
++static int __init gs_module_init( void );
++static void __exit gs_module_exit( void );
++
++/* tty driver */
++static int gs_open( struct tty_struct *tty, struct file *file );
++static void gs_close( struct tty_struct *tty, struct file *file );
++static int gs_write( struct tty_struct *tty, int from_user,
++	const unsigned char *buf, int count );
++static void gs_put_char( struct tty_struct *tty, unsigned char ch );
++static void gs_flush_chars( struct tty_struct *tty );
++static int gs_write_room( struct tty_struct *tty );
++static int gs_chars_in_buffer( struct tty_struct *tty );
++static void gs_throttle( struct tty_struct * tty );
++static void gs_unthrottle( struct tty_struct * tty );
++static void gs_break( struct tty_struct *tty, int break_state );
++static int  gs_ioctl( struct tty_struct *tty, struct file *file,
++	unsigned int cmd, unsigned long arg );
++static void gs_set_termios( struct tty_struct *tty, struct termios *old );
++static int gs_read_proc( char *page, char **start, off_t off, int count,
++	int *eof, void *data );
++
++static int gs_send( struct gs_dev *dev );
++static int gs_send_packet( struct gs_dev *dev, char *packet,
++	unsigned int size );
++static int gs_recv_packet( struct gs_dev *dev, char *packet,
++	unsigned int size );
++static void gs_read_complete( struct usb_ep *ep, struct usb_request *req );
++static void gs_write_complete( struct usb_ep *ep, struct usb_request *req );
++
++/* gadget driver */
++static int gs_bind( struct usb_gadget *gadget );
++static void gs_unbind( struct usb_gadget *gadget );
++static int gs_setup( struct usb_gadget *gadget,
++	const struct usb_ctrlrequest *ctrl );
++static void gs_setup_complete( struct usb_ep *ep, struct usb_request *req );
++static void gs_disconnect( struct usb_gadget *gadget );
++static int gs_set_config( struct gs_dev *dev, unsigned config );
++static void gs_reset_config( struct gs_dev *dev );
++static int gs_build_config_desc( u8 *buf, enum usb_device_speed speed,
++		u8 type, unsigned int index );
++
++static struct usb_request *gs_alloc_req( struct usb_ep *ep, unsigned int len,
++	int kmalloc_flags );
++static void gs_free_req( struct usb_ep *ep, struct usb_request *req );
++
++static struct gs_req_entry *gs_alloc_req_entry( struct usb_ep *ep, unsigned len,
++	int kmalloc_flags );
++static void gs_free_req_entry( struct usb_ep *ep, struct gs_req_entry *req );
++
++static int gs_alloc_ports( struct gs_dev *dev, int kmalloc_flags );
++static void gs_free_ports( struct gs_dev *dev );
++
++/* circular buffer */
++static struct gs_buf *gs_buf_alloc( unsigned int size, int kmalloc_flags );
++static void gs_buf_free( struct gs_buf *gb );
++static void gs_buf_clear( struct gs_buf *gb );
++static unsigned int gs_buf_data_avail( struct gs_buf *gb );
++static unsigned int gs_buf_space_avail( struct gs_buf *gb );
++static unsigned int gs_buf_put( struct gs_buf *gb, const char *buf,
++	unsigned int count );
++static unsigned int gs_buf_get( struct gs_buf *gb, char *buf,
++	unsigned int count );
++
++/* external functions */
++extern int net2280_set_fifo_mode(struct usb_gadget *gadget, int mode);
++
++
++/* Globals */
++
++static struct gs_dev *gs_device;
++
++static const char *EP_IN_NAME;
++static const char *EP_OUT_NAME;
++
++static struct semaphore	gs_open_close_sem[GS_NUM_PORTS];
++
++static unsigned int read_q_size = GS_DEFAULT_READ_Q_SIZE;
++static unsigned int write_q_size = GS_DEFAULT_WRITE_Q_SIZE;
++
++static unsigned int write_buf_size = GS_DEFAULT_WRITE_BUF_SIZE;
++
++static unsigned char gs_tmp_buf[GS_TMP_BUF_SIZE];
++static struct semaphore	gs_tmp_buf_sem;
++
++/* tty variables */
++static int gs_refcount;
++static struct tty_struct *gs_tty[GS_NUM_PORTS];
++static struct termios *gs_termios[GS_NUM_PORTS];
++static struct termios *gs_termios_locked[GS_NUM_PORTS];
++
++/* tty driver struct */
++static struct tty_driver gs_tty_driver = {
++	.magic =		TTY_DRIVER_MAGIC,
++	.driver_name =		GS_SHORT_NAME,
++	.name =			"ttygs",
++	.major =		GS_MAJOR,
++	.minor_start =		GS_MINOR_START,
++	.num =			GS_NUM_PORTS,
++	.type =			TTY_DRIVER_TYPE_SERIAL,
++	.subtype =		SERIAL_TYPE_NORMAL,
++	.flags =		TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
++	.refcount =		&gs_refcount,
++	.table =		gs_tty,
++	.termios =		gs_termios,
++	.termios_locked =	gs_termios_locked,
++
++	.open =			gs_open,
++	.close =		gs_close,
++	.write =		gs_write,
++	.put_char =		gs_put_char,
++	.flush_chars =		gs_flush_chars,
++	.write_room =		gs_write_room,
++	.ioctl =		gs_ioctl,
++	.set_termios =		gs_set_termios,
++	.throttle =		gs_throttle,
++	.unthrottle =		gs_unthrottle,
++	.break_ctl =		gs_break,
++	.chars_in_buffer =	gs_chars_in_buffer,
++	.read_proc =		gs_read_proc,
++};
++
++/* gadget driver struct */
++static struct usb_gadget_driver gs_gadget_driver = {
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	.speed =		USB_SPEED_HIGH,
++#else
++	.speed =		USB_SPEED_FULL,
++#endif
++	.function =		GS_LONG_NAME,
++	.bind =			gs_bind,
++	.unbind =		gs_unbind,
++	.setup =		gs_setup,
++	.disconnect =		gs_disconnect,
++	.driver = {
++		.name =		GS_SHORT_NAME,
++		/* .shutdown = ... */
++		/* .suspend = ...  */
++		/* .resume = ...   */
++	},
++};
++
++
++/* USB descriptors */
++
++#define GS_MANUFACTURER_STR_ID	1
++#define GS_PRODUCT_STR_ID	2
++#define GS_SERIAL_STR_ID	3
++#define GS_CONFIG_STR_ID	4
++
++/* static strings, in iso 8859/1 */
++static char manufacturer[40];
++static struct usb_string gs_strings[] = {
++	{ GS_MANUFACTURER_STR_ID, manufacturer },
++	{ GS_PRODUCT_STR_ID, GS_LONG_NAME },
++	{ GS_SERIAL_STR_ID, "0" },
++	{ GS_CONFIG_STR_ID, "Bulk" },
++	{  } /* end of list */
++};
++
++static struct usb_gadget_strings gs_string_table = {
++	.language =		0x0409,	/* en-us */
++	.strings =		gs_strings,
++};
++
++static struct usb_device_descriptor gs_device_desc = {
++	.bLength =		USB_DT_DEVICE_SIZE,
++	.bDescriptorType =	USB_DT_DEVICE,
++	.bcdUSB =		__constant_cpu_to_le16(0x0200),
++	.bDeviceClass =		USB_CLASS_VENDOR_SPEC,
++	.idVendor =		__constant_cpu_to_le16(GS_VENDOR_ID),
++	.idProduct =		__constant_cpu_to_le16(GS_PRODUCT_ID),
++	.iManufacturer =	GS_MANUFACTURER_STR_ID,
++	.iProduct =		GS_PRODUCT_STR_ID,
++	.iSerialNumber =	GS_SERIAL_STR_ID,
++	.bNumConfigurations =	GS_NUM_CONFIGS,
++};
++
++static const struct usb_config_descriptor gs_config_desc = {
++	.bLength =		USB_DT_CONFIG_SIZE,
++	.bDescriptorType =	USB_DT_CONFIG,
++	/* .wTotalLength set by gs_build_config_desc */
++	.bNumInterfaces =	GS_NUM_INTERFACES,
++	.bConfigurationValue =	GS_BULK_CONFIG_ID,
++	.iConfiguration =	GS_CONFIG_STR_ID,
++	.bmAttributes =		USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
++	.bMaxPower =		1,
++};
++
++static const struct usb_interface_descriptor gs_interface_desc = {
++	.bLength =		USB_DT_INTERFACE_SIZE,
++	.bDescriptorType =	USB_DT_INTERFACE,
++	.bNumEndpoints =	GS_NUM_ENDPOINTS,
++	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
++	.iInterface =		GS_CONFIG_STR_ID,
++};
++
++static struct usb_endpoint_descriptor gs_fullspeed_in_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++	.bEndpointAddress =	USB_DIR_IN,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++};
++
++static struct usb_endpoint_descriptor gs_fullspeed_out_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++	.bEndpointAddress =	USB_DIR_OUT,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++};
++
++static struct usb_endpoint_descriptor gs_highspeed_in_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16(512),
++};
++
++static struct usb_endpoint_descriptor gs_highspeed_out_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16(512),
++};
++
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++static struct usb_qualifier_descriptor gs_qualifier_desc = {
++	.bLength =		sizeof(struct usb_qualifier_descriptor),
++	.bDescriptorType =	USB_DT_DEVICE_QUALIFIER,
++	.bcdUSB =		__constant_cpu_to_le16 (0x0200),
++	.bDeviceClass =		USB_CLASS_VENDOR_SPEC,
++	/* assumes ep0 uses the same value for both speeds ... */
++	.bNumConfigurations =	GS_NUM_CONFIGS,
++};
++#endif
++
++
++/* Module */
++
++MODULE_DESCRIPTION( GS_LONG_NAME );
++MODULE_AUTHOR( "Al Borchers" );
++MODULE_LICENSE( "GPL" );
++
++#if G_SERIAL_DEBUG
++MODULE_PARM( debug, "i" );
++MODULE_PARM_DESC( debug, "Enable debugging, 0=off, 1=on" );
++#endif
++
++MODULE_PARM( read_q_size, "i" );
++MODULE_PARM_DESC( read_q_size, "Read request queue size, default=32" );
++
++MODULE_PARM( write_q_size, "i" );
++MODULE_PARM_DESC( write_q_size, "Write request queue size, default=32" );
++
++MODULE_PARM( write_buf_size, "i" );
++MODULE_PARM_DESC( write_buf_size, "Write buffer size, default=8192" );
++
++module_init( gs_module_init );
++module_exit( gs_module_exit );
++
++/*
++*  gs_module_init
++*
++*  Register as a USB gadget driver and a tty driver.
++*/
++
++static int __init gs_module_init( void )
++{
++
++	int i,ret;
++
++
++	if( (ret=usb_gadget_register_driver( &gs_gadget_driver )) ) {
++		printk( KERN_ERR
++		"gs_module_init: cannot register gadget driver, ret=%d\n",
++			ret );
++		return( ret );
++	}
++
++	/* initial stty settings */
++	gs_tty_driver.init_termios = tty_std_termios;
++	gs_tty_driver.init_termios.c_cflag
++		= B9600 | CS8 | CREAD | HUPCL | CLOCAL;
++
++	for( i=0; i<GS_NUM_PORTS; i++ )
++		sema_init( &gs_open_close_sem[i], 1 );
++
++	sema_init( &gs_tmp_buf_sem, 1 );
++
++	if( (ret=tty_register_driver( &gs_tty_driver )) ) {
++		usb_gadget_unregister_driver( &gs_gadget_driver );
++		printk( KERN_ERR
++			"gs_module_init: cannot register tty driver, ret=%d\n",
++			ret );
++		return( ret );
++	} 
++
++	printk( KERN_INFO "gs_module_init: %s %s loaded\n", GS_LONG_NAME,
++		GS_VERSION_STR );
++
++	return( 0 );        
++
++}
++
++
++/*
++* gs_module_exit
++*
++* Unregister as a tty driver and a USB gadget driver.
++*/
++
++static void __exit gs_module_exit( void )
++{
++
++	tty_unregister_driver( &gs_tty_driver );
++	usb_gadget_unregister_driver( &gs_gadget_driver );
++
++	printk( KERN_INFO "gs_module_exit: %s %s unloaded\n",
++		GS_LONG_NAME, GS_VERSION_STR );
++
++}
++
++
++/* TTY Driver */
++
++/*
++ * gs_open
++ */
++
++static int gs_open( struct tty_struct *tty, struct file *file )
++{
++
++	int port_num;
++	unsigned long flags;
++	struct gs_port *port;
++	struct gs_dev *dev;
++	struct gs_buf *buf;
++	struct semaphore *sem;
++
++
++	port_num = MINOR( tty->device ) - GS_MINOR_START;
++
++	gs_debug( "gs_open: (%d,%p,%p)\n", port_num, tty, file );
++
++	tty->driver_data = NULL;
++
++	if( port_num < 0 || port_num >= GS_NUM_PORTS ) {
++		printk( KERN_ERR "gs_open: (%d,%p,%p) invalid port number\n",
++			port_num, tty, file );
++		return( -ENODEV );
++	}
++
++	dev = gs_device;
++
++	if( dev == NULL ) {
++		printk( KERN_ERR "gs_open: (%d,%p,%p) NULL device pointer\n",
++			port_num, tty, file );
++		return( -ENODEV );
++	}
++
++	sem = &gs_open_close_sem[port_num];
++	if( down_interruptible( sem ) ) {
++		printk( KERN_ERR
++		"gs_open: (%d,%p,%p) interrupted waiting for semaphore\n",
++			port_num, tty, file );
++		return( -ERESTARTSYS );
++	}
++
++	spin_lock_irqsave(&dev->dev_lock, flags );
++
++	if( dev->dev_config == GS_NO_CONFIG_ID ) {
++		printk( KERN_ERR
++			"gs_open: (%d,%p,%p) device is not connected\n",
++			port_num, tty, file );
++		spin_unlock_irqrestore(&dev->dev_lock, flags );
++		up( sem );
++		return( -ENODEV );
++	}
++
++	port = dev->dev_port[port_num];
++
++	if( port == NULL ) {
++		printk( KERN_ERR "gs_open: (%d,%p,%p) NULL port pointer\n",
++			port_num, tty, file );
++		spin_unlock_irqrestore(&dev->dev_lock, flags );
++		up( sem );
++		return( -ENODEV );
++	}
++
++	spin_lock(&port->port_lock );
++	spin_unlock(&dev->dev_lock );
++
++	if( port->port_dev == NULL ) {
++		printk( KERN_ERR "gs_open: (%d,%p,%p) port disconnected (1)\n",
++			port_num, tty, file );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		up( sem );
++		return( -EIO );
++	}
++
++	if( port->port_open_count > 0 ) {
++		++port->port_open_count;
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		gs_debug( "gs_open: (%d,%p,%p) already open\n",
++			port_num, tty, file );
++		up( sem );
++		return( 0 );
++	}
++
++	/* mark port as in use, we can drop port lock and sleep if necessary */
++	port->port_in_use = 1;
++
++	/* allocate write buffer on first open */
++	if( port->port_write_buf == NULL ) {
++
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		buf = gs_buf_alloc( write_buf_size, GFP_KERNEL );
++		spin_lock_irqsave(&port->port_lock, flags );
++
++		/* might have been disconnected while asleep, check */
++		if( port->port_dev == NULL ) {
++			printk( KERN_ERR
++				"gs_open: (%d,%p,%p) port disconnected (2)\n",
++				port_num, tty, file );
++			port->port_in_use = 0;
++			spin_unlock_irqrestore(&port->port_lock, flags );
++			up( sem );
++			return( -EIO );
++		}
++
++		if( (port->port_write_buf=buf) == NULL ) {
++			printk( KERN_ERR "gs_open: (%d,%p,%p) cannot allocate port write buffer\n",
++				port_num, tty, file );
++			port->port_in_use = 0;
++			spin_unlock_irqrestore(&port->port_lock, flags );
++			up( sem );
++			return( -ENOMEM );
++		}
++
++	}
++
++	/* wait for carrier detect (not implemented) */
++
++	/* might have been disconnected while asleep, check */
++	if( port->port_dev == NULL ) {
++		printk( KERN_ERR "gs_open: (%d,%p,%p) port disconnected (3)\n",
++			port_num, tty, file );
++		port->port_in_use = 0;
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		up( sem );
++		return( -EIO );
++	}
++
++	tty->driver_data = port;
++	port->port_tty = tty;
++	port->port_open_count = 1;
++	port->port_in_use = 0;
++
++	spin_unlock_irqrestore(&port->port_lock, flags );
++	up( sem );
++
++	gs_debug( "gs_open: (%d,%p,%p) completed\n", port_num, tty, file );
++
++	return( 0 ); 
++
++}
++
++
++/*
++ * gs_close
++ */
++
++static void gs_close( struct tty_struct *tty, struct file *file )
++{
++
++	unsigned long flags;
++	struct gs_port *port = tty->driver_data;
++	struct semaphore *sem;
++
++
++	if( port == NULL ) {
++		printk( KERN_ERR "gs_close: NULL port pointer\n" );
++		return;
++	}
++
++	gs_debug( "gs_close: (%d,%p,%p)\n", port->port_num, tty, file );
++
++	sem = &gs_open_close_sem[port->port_num];
++	down( sem );
++
++	spin_lock_irqsave(&port->port_lock, flags );
++
++	if( port->port_open_count == 0 ) {
++		printk( KERN_ERR
++			"gs_close: (%d,%p,%p) port is already closed\n",
++			port->port_num, tty, file );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		up( sem );
++		return;
++	}
++
++	if( port->port_open_count > 0 ) {
++		--port->port_open_count;
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		up( sem );
++		return;
++	}
++
++	/* free disconnected port on final close */
++	if( port->port_dev == NULL ) {
++		kfree( port );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		up( sem );
++		return;
++	}
++
++	/* mark port as closed but in use, we can drop port lock */
++	/* and sleep if necessary */
++	port->port_in_use = 1;
++	port->port_open_count = 0;
++
++	/* wait for write buffer to drain, or */
++	/* at most GS_CLOSE_TIMEOUT seconds */
++	if( gs_buf_data_avail( port->port_write_buf ) > 0 ) {
++		wait_cond_interruptible_timeout( port->port_write_wait,
++		port->port_dev == NULL
++		|| gs_buf_data_avail(port->port_write_buf) == 0,
++		&port->port_lock, flags, GS_CLOSE_TIMEOUT * HZ );
++	}
++
++	/* free disconnected port on final close */
++	/* (might have happened during the above sleep) */
++	if( port->port_dev == NULL ) {
++		kfree( port );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		up( sem );
++		return;
++	}
++
++	gs_buf_clear( port->port_write_buf );
++
++	tty->driver_data = NULL;
++	port->port_tty = NULL;
++	port->port_in_use = 0;
++
++	spin_unlock_irqrestore(&port->port_lock, flags );
++	up( sem );
++
++	gs_debug( "gs_close: (%d,%p,%p) completed\n",
++		port->port_num, tty, file );
++
++}
++
++
++/*
++ * gs_write
++ */
++
++static int gs_write( struct tty_struct *tty, int from_user,
++	const unsigned char *buf, int count )
++{
++
++	unsigned long flags;
++	struct gs_port *port = tty->driver_data;
++
++
++	if( port == NULL ) {
++		printk( KERN_ERR "gs_write: NULL port pointer\n" );
++		return( -EIO );
++	}
++
++	gs_debug( "gs_write: (%d,%p) writing %d bytes\n", port->port_num, tty,
++		count );
++
++	if( count == 0 )
++		return( 0 );
++
++	/* copy from user into tmp buffer, get tmp_buf semaphore */
++	if( from_user ) {
++		if( count > GS_TMP_BUF_SIZE )
++			count = GS_TMP_BUF_SIZE;
++		down( &gs_tmp_buf_sem );
++		if( copy_from_user( gs_tmp_buf, buf, count ) != 0 ) {
++			up( &gs_tmp_buf_sem );
++			printk( KERN_ERR
++			"gs_write: (%d,%p) cannot copy from user space\n",
++				port->port_num, tty );
++			return( -EFAULT );
++		}
++		buf = gs_tmp_buf;
++	}
++
++	spin_lock_irqsave(&port->port_lock, flags );
++
++	if( port->port_dev == NULL ) {
++		printk( KERN_ERR "gs_write: (%d,%p) port is not connected\n",
++			port->port_num, tty );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		if( from_user )
++			up( &gs_tmp_buf_sem );
++		return( -EIO );
++	}
++
++	if( port->port_open_count == 0 ) {
++		printk( KERN_ERR "gs_write: (%d,%p) port is closed\n",
++			port->port_num, tty );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		if( from_user )
++			up( &gs_tmp_buf_sem );
++		return( -EBADF );
++	}
++
++	count = gs_buf_put( port->port_write_buf, buf, count );
++
++	spin_unlock_irqrestore(&port->port_lock, flags );
++
++	if( from_user )
++		up( &gs_tmp_buf_sem );
++
++	gs_send( gs_device );
++
++	gs_debug( "gs_write: (%d,%p) wrote %d bytes\n", port->port_num, tty,
++		count );
++
++	return( count );
++
++}
++
++
++/*
++ * gs_put_char
++ */
++
++static void gs_put_char( struct tty_struct *tty, unsigned char ch )
++{
++
++	unsigned long flags;
++	struct gs_port *port = tty->driver_data;
++
++
++	if( port == NULL ) {
++		printk( KERN_ERR "gs_put_char: NULL port pointer\n" );
++		return;
++	}
++
++	gs_debug( "gs_put_char: (%d,%p) char=0x%x, called from %p, %p, %p\n", port->port_num, tty, ch, __builtin_return_address(0), __builtin_return_address(1), __builtin_return_address(2) );
++
++	spin_lock_irqsave(&port->port_lock, flags );
++
++	if( port->port_dev == NULL ) {
++		printk( KERN_ERR "gs_put_char: (%d,%p) port is not connected\n",
++			port->port_num, tty );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		return;
++	}
++
++	if( port->port_open_count == 0 ) {
++		printk( KERN_ERR "gs_put_char: (%d,%p) port is closed\n",
++			port->port_num, tty );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		return;
++	}
++
++	gs_buf_put( port->port_write_buf, &ch, 1 );
++
++	spin_unlock_irqrestore(&port->port_lock, flags );
++
++}
++
++
++/*
++ * gs_flush_chars
++ */
++
++static void gs_flush_chars( struct tty_struct *tty )
++{
++
++	unsigned long flags;
++	struct gs_port *port = tty->driver_data;
++
++
++	if( port == NULL ) {
++		printk( KERN_ERR "gs_flush_chars: NULL port pointer\n" );
++		return;
++	}
++
++	gs_debug( "gs_flush_chars: (%d,%p)\n", port->port_num, tty );
++
++	spin_lock_irqsave(&port->port_lock, flags );
++
++	if( port->port_dev == NULL ) {
++		printk( KERN_ERR
++			"gs_flush_chars: (%d,%p) port is not connected\n",
++			port->port_num, tty );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		return;
++	}
++
++	if( port->port_open_count == 0 ) {
++		printk( KERN_ERR "gs_flush_chars: (%d,%p) port is closed\n",
++			port->port_num, tty );
++		spin_unlock_irqrestore(&port->port_lock, flags );
++		return;
++	}
++
++	spin_unlock_irqrestore(&port->port_lock, flags );
++
++	gs_send( gs_device );
++
++}
++
++
++/*
++ * gs_write_room
++ */
++
++static int gs_write_room( struct tty_struct *tty )
++{
++
++	int room = 0;
++	unsigned long flags;
++	struct gs_port *port = tty->driver_data;
++
++
++	if( port == NULL )
++		return( 0 );
++
++	spin_lock_irqsave(&port->port_lock, flags );
++
++	if( port->port_dev != NULL && port->port_open_count > 0
++	&& port->port_write_buf != NULL )
++		room = gs_buf_space_avail( port->port_write_buf );
++
++	spin_unlock_irqrestore(&port->port_lock, flags );
++
++	gs_debug( "gs_write_room: (%d,%p) room=%d\n",
++		port->port_num, tty, room );
++
++	return( room );
++
++}
++
++
++/*
++ * gs_chars_in_buffer
++ */
++
++static int gs_chars_in_buffer( struct tty_struct *tty )
++{
++
++	int chars = 0;
++	unsigned long flags;
++	struct gs_port *port = tty->driver_data;
++
++
++	if( port == NULL )
++		return( 0 );
++
++	spin_lock_irqsave(&port->port_lock, flags );
++
++	if( port->port_dev != NULL && port->port_open_count > 0
++	&& port->port_write_buf != NULL )
++		chars = gs_buf_data_avail( port->port_write_buf );
++
++	spin_unlock_irqrestore(&port->port_lock, flags );
++
++	gs_debug( "gs_chars_in_buffer: (%d,%p) chars=%d\n",
++		port->port_num, tty, chars );
++
++	return( chars );
++
++}
++
++
++/*
++ * gs_throttle
++ */
++
++static void gs_throttle( struct tty_struct *tty )
++{
++
++}
++
++
++/*
++ * gs_unthrottle
++ */
++
++static void gs_unthrottle( struct tty_struct *tty )
++{
++
++}
++
++
++/*
++ * gs_break
++ */
++
++static void gs_break( struct tty_struct *tty, int break_state )
++{
++
++}
++
++
++/*
++ * gs_ioctl
++ */
++
++static int  gs_ioctl( struct tty_struct *tty, struct file *file,
++	unsigned int cmd, unsigned long arg )
++{
++
++	struct gs_port *port = tty->driver_data;
++
++
++	if( port == NULL ) {
++		printk( KERN_ERR "gs_ioctl: NULL port pointer\n" );
++		return( -EIO );
++	}
++
++	gs_debug( "gs_ioctl: (%d,%p,%p) cmd=0x%4.4x, arg=%lu\n",
++		port->port_num, tty, file, cmd, arg );
++
++	/* handle ioctls */
++
++	/* could not handle ioctl */
++	return( -ENOIOCTLCMD );
++
++}
++
++
++/*
++ * gs_set_termios
++ */
++
++static void gs_set_termios( struct tty_struct *tty, struct termios *old )
++{
++
++}
++
++
++/*
++ * gs_read_proc
++ */
++
++static int gs_read_proc( char *page, char **start, off_t off, int count,
++	int *eof, void *data )
++{
++
++	return( 0 );
++
++}
++
++
++/*
++* gs_send
++*
++* This function finds available write requests, calls
++* gs_send_packet to fill these packets with data, and
++* continues until either there are no more write requests
++* available or no more data to send.  This function is
++* run whenever data arrives or write requests are available.
++*/
++
++static int gs_send( struct gs_dev *dev )
++{
++
++	int ret,len;
++	unsigned long flags;
++	struct usb_ep *ep;
++	struct usb_request *req;
++	struct gs_req_entry *req_entry;
++
++
++	if( dev == NULL ) {
++		printk( KERN_ERR "gs_send: NULL device pointer\n" );
++		return( -ENODEV );
++	}
++
++	spin_lock_irqsave(&dev->dev_lock, flags );
++
++	ep = dev->dev_in_ep;
++
++	while( !list_empty( &dev->dev_req_list ) ) {
++
++		req_entry = list_entry( dev->dev_req_list.next,
++			struct gs_req_entry, re_entry );
++
++		req = req_entry->re_req;
++
++		len = gs_send_packet( dev, req->buf, ep->maxpacket );
++
++		if( len > 0 ) {
++gs_debug_level( 3, "gs_send: len=%d, 0x%2.2x 0x%2.2x 0x%2.2x ...\n", len, *((unsigned char *)req->buf), *((unsigned char *)req->buf+1), *((unsigned char *)req->buf+2) );
++			list_del( &req_entry->re_entry );
++			req->length = len;
++			if( (ret=usb_ep_queue( ep, req, GFP_ATOMIC )) ) {
++				printk( KERN_ERR
++				"gs_send: cannot queue read request, ret=%d\n",
++					ret );
++				break;
++			}
++		} else {
++			break;
++		}
++
++	}
++
++	spin_unlock_irqrestore(&dev->dev_lock, flags );
++
++	return( 0 );
++
++}
++
++
++/*
++ * gs_send_packet
++ *
++ * If there is data to send, a packet is built in the given
++ * buffer and the size is returned.  If there is no data to
++ * send, 0 is returned.  If there is any error a negative
++ * error number is returned.
++ *
++ * Called during USB completion routine, on interrupt time.
++ *
++ * We assume that disconnect will not happen until all completion
++ * routines have completed, so we can assume that the dev_port
++ * array does not change during the lifetime of this function.
++ */
++
++static int gs_send_packet( struct gs_dev *dev, char *packet, unsigned int size )
++{
++
++	unsigned int len;
++	struct gs_port *port;
++
++
++	/* TEMPORARY -- only port 0 is supported right now */
++	port = dev->dev_port[0];
++
++	if( port == NULL ) {
++		printk( KERN_ERR
++			"gs_send_packet: port=%d, NULL port pointer\n",
++			0 );
++		return( -EIO );
++	}
++
++	spin_lock(&port->port_lock );
++
++	len = gs_buf_data_avail( port->port_write_buf );
++	if( len < size )
++		size = len;
++
++	if( size == 0 ) {
++		spin_unlock(&port->port_lock );
++		return( 0 );
++	}
++
++	size = gs_buf_get( port->port_write_buf, packet, size );
++
++	wake_up_interruptible( &port->port_tty->write_wait );
++
++	spin_unlock(&port->port_lock );
++
++	return( size );
++
++}
++
++
++/*
++ * gs_recv_packet
++ *
++ * Called for each USB packet received.  Reads the packet
++ * header and stuffs the data in the appropriate tty buffer.
++ * Returns 0 if successful, or a negative error number.
++ *
++ * Called during USB completion routine, on interrupt time.
++ *
++ * We assume that disconnect will not happen until all completion
++ * routines have completed, so we can assume that the dev_port
++ * array does not change during the lifetime of this function.
++ */
++
++static int gs_recv_packet( struct gs_dev *dev, char *packet, unsigned int size )
++{
++
++	unsigned int len;
++	struct gs_port *port;
++
++
++	/* TEMPORARY -- only port 0 is supported right now */
++	port = dev->dev_port[0];
++
++	if( port == NULL ) {
++		printk( KERN_ERR "gs_recv_packet: port=%d, NULL port pointer\n",
++			port->port_num );
++		return( -EIO );
++	}
++
++	spin_lock(&port->port_lock );
++
++	if( port->port_tty == NULL ) {
++		printk( KERN_ERR "gs_recv_packet: port=%d, NULL tty pointer\n",
++			port->port_num );
++		spin_unlock(&port->port_lock );
++		return( -EIO );
++	}
++
++	if( port->port_tty->magic != TTY_MAGIC ) {
++		printk( KERN_ERR "gs_recv_packet: port=%d, bad tty magic\n",
++			port->port_num );
++		spin_unlock(&port->port_lock );
++		return( -EIO );
++	}
++
++	len = (unsigned int)(TTY_FLIPBUF_SIZE - port->port_tty->flip.count);
++	if( len < size )
++		size = len;
++
++	if( size > 0 ) {
++		memcpy( port->port_tty->flip.char_buf_ptr, packet, size );
++		port->port_tty->flip.char_buf_ptr += size;
++		port->port_tty->flip.count += size;
++		tty_flip_buffer_push( port->port_tty );
++		wake_up_interruptible( &port->port_tty->read_wait );
++	}
++
++	spin_unlock(&port->port_lock );
++
++	return( 0 );
++
++}
++
++
++/*
++* gs_read_complete
++*/
++
++static void gs_read_complete( struct usb_ep *ep, struct usb_request *req )
++{
++
++	int ret;
++	struct gs_dev *dev = ep->driver_data;
++
++
++	if( dev == NULL ) {
++		printk( KERN_ERR "gs_read_complete: NULL device pointer\n" );
++		return;
++	}
++
++	switch( req->status ) {
++
++	case 0:
++ 		/* normal completion */
++		gs_recv_packet( dev, req->buf, req->actual );
++requeue:
++		req->length = ep->maxpacket;
++		if( (ret=usb_ep_queue( ep, req, GFP_ATOMIC )) ) {
++			printk( KERN_ERR
++			"gs_read_complete: cannot queue read request, ret=%d\n",
++				ret );
++		}
++		break;
++
++	case -ESHUTDOWN:
++		/* disconnect */
++		gs_debug( "gs_read_complete: shutdown\n" );
++		gs_free_req( ep, req );
++		break;
++
++	default:
++		/* unexpected */
++		printk( KERN_ERR
++		"gs_read_complete: unexpected status error, status=%d\n",
++			req->status );
++		goto requeue;
++		break;
++
++	}
++
++}
++
++
++/*
++* gs_write_complete
++*/
++
++static void gs_write_complete( struct usb_ep *ep, struct usb_request *req )
++{
++
++	struct gs_dev *dev = ep->driver_data;
++	struct gs_req_entry *gs_req = req->context;
++
++
++	if( dev == NULL ) {
++		printk( KERN_ERR "gs_write_complete: NULL device pointer\n" );
++		return;
++	}
++
++	switch( req->status ) {
++
++	case 0:
++		/* normal completion */
++requeue:
++		if( gs_req == NULL ) {
++			printk( KERN_ERR
++				"gs_write_complete: NULL request pointer\n" );
++			return;
++		}
++
++		spin_lock(&dev->dev_lock );
++		list_add( &gs_req->re_entry, &dev->dev_req_list );
++		spin_unlock(&dev->dev_lock );
++
++		gs_send( dev );
++
++		break;
++
++	case -ESHUTDOWN:
++		/* disconnect */
++		gs_debug( "gs_write_complete: shutdown\n" );
++		gs_free_req( ep, req );
++		break;
++
++	default:
++		printk( KERN_ERR
++		"gs_write_complete: unexpected status error, status=%d\n",
++			req->status );
++		goto requeue;
++		break;
++
++	}
++
++}
++
++
++/* Gadget Driver */
++
++/*
++ * gs_bind
++ *
++ * Called on module load.  Allocates and initializes the device
++ * structure and a control request.
++ */
++static int gs_bind(struct usb_gadget *gadget)
++{
++	int ret;
++	struct usb_ep *ep;
++	struct gs_dev *dev;
++
++	usb_ep_autoconfig_reset(gadget);
++
++	ep = usb_ep_autoconfig(gadget, &gs_fullspeed_in_desc);
++	if (!ep)
++		goto autoconf_fail;
++	EP_IN_NAME = ep->name;
++	ep->driver_data = ep;	/* claim the endpoint */
++
++	ep = usb_ep_autoconfig(gadget, &gs_fullspeed_out_desc);
++	if (!ep)
++		goto autoconf_fail;
++	EP_OUT_NAME = ep->name;
++	ep->driver_data = ep;	/* claim the endpoint */
++
++	/* device specific bcdDevice value in device descriptor */
++	if (gadget_is_net2280(gadget)) {
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0001);
++	} else if (gadget_is_pxa(gadget)) {
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0002);
++	} else if (gadget_is_sh(gadget)) {
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0003);
++	} else if (gadget_is_sa1100(gadget)) {
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0004);
++	} else if (gadget_is_goku(gadget)) {
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0005);
++	} else if (gadget_is_mq11xx(gadget)) {
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0006);
++	} else if (gadget_is_omap(gadget)) {
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0007);
++	} else {
++		printk(KERN_WARNING "gs_bind: controller '%s' not recognized\n",
++			gadget->name);
++		/* unrecognized, but safe unless bulk is REALLY quirky */
++		gs_device_desc.bcdDevice =
++			__constant_cpu_to_le16(GS_VERSION_NUM|0x0099);
++	}
++
++	gs_device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	/* assume ep0 uses the same packet size for both speeds */
++	gs_qualifier_desc.bMaxPacketSize0 = gs_device_desc.bMaxPacketSize0;
++	/* assume endpoints are dual-speed */
++	gs_highspeed_in_desc.bEndpointAddress =
++		gs_fullspeed_in_desc.bEndpointAddress;
++	gs_highspeed_out_desc.bEndpointAddress =
++		gs_fullspeed_out_desc.bEndpointAddress;
++#endif /* CONFIG_USB_GADGET_DUALSPEED */
++
++	usb_gadget_set_selfpowered(gadget);
++
++	gs_device = dev = kmalloc(sizeof(struct gs_dev), GFP_KERNEL);
++	if (dev == NULL)
++		return -ENOMEM;
++
++	snprintf (manufacturer, sizeof(manufacturer),
++		UTS_SYSNAME " " UTS_RELEASE " with %s", gadget->name);
++
++	memset(dev, 0, sizeof(struct gs_dev));
++	dev->dev_gadget = gadget;
++	spin_lock_init(&dev->dev_lock);
++	INIT_LIST_HEAD(&dev->dev_req_list);
++	set_gadget_data(gadget, dev);
++
++	if ((ret = gs_alloc_ports(dev, GFP_KERNEL)) != 0) {
++		printk(KERN_ERR "gs_bind: cannot allocate ports\n");
++		gs_unbind(gadget);
++		return ret;
++	}
++
++	/* preallocate control response and buffer */
++	dev->dev_ctrl_req = gs_alloc_req(gadget->ep0, GS_MAX_DESC_LEN,
++		GFP_KERNEL);
++	if (dev->dev_ctrl_req == NULL) {
++		gs_unbind(gadget);
++		return -ENOMEM;
++	}
++	dev->dev_ctrl_req->complete = gs_setup_complete;
++
++	gadget->ep0->driver_data = dev;
++
++	printk(KERN_INFO "gs_bind: %s %s bound\n",
++		GS_LONG_NAME, GS_VERSION_STR);
++
++	return 0;
++
++autoconf_fail:
++	printk(KERN_ERR "gs_bind: cannot autoconfigure on %s\n", gadget->name);
++	return -ENODEV;
++}
++
++
++/*
++ * gs_unbind
++ *
++ * Called on module unload.  Frees the control request and device
++ * structure.
++ */
++
++static void gs_unbind( struct usb_gadget *gadget )
++{
++
++	struct gs_dev *dev = get_gadget_data( gadget );
++
++
++	gs_device = NULL;
++
++	/* read/write requests already freed, only control request remains */
++	if( dev != NULL ) {
++		if( dev->dev_ctrl_req != NULL )
++			gs_free_req( gadget->ep0, dev->dev_ctrl_req );
++		gs_free_ports( dev );
++		kfree( dev );
++		set_gadget_data( gadget, NULL );
++	}
++
++	printk( KERN_INFO "gs_unbind: %s %s unbound\n", GS_LONG_NAME,
++		GS_VERSION_STR );
++
++}
++
++
++/*
++ * gs_setup
++ *
++ * Implements all the control endpoint functionality that's not
++ * handled in hardware or the hardware driver.
++ *
++ * Returns the size of the data sent to the host, or a negative
++ * error number.
++ */
++
++static int gs_setup( struct usb_gadget *gadget,
++	const struct usb_ctrlrequest *ctrl )
++{
++
++	int ret = -EOPNOTSUPP;
++	unsigned int sv_config;
++	struct gs_dev *dev = get_gadget_data( gadget );
++	struct usb_request *req = dev->dev_ctrl_req;
++
++
++	switch (ctrl->bRequest) {
++
++	case USB_REQ_GET_DESCRIPTOR:
++
++		if( ctrl->bRequestType != USB_DIR_IN )
++			break;
++
++		switch (ctrl->wValue >> 8) {
++
++		case USB_DT_DEVICE:
++			ret = min( ctrl->wLength,
++				(u16)sizeof(struct usb_device_descriptor) );
++			memcpy( req->buf, &gs_device_desc, ret );
++			break;
++
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++		case USB_DT_DEVICE_QUALIFIER:
++			if (!gadget->is_dualspeed)
++				break;
++			ret = min( ctrl->wLength,
++				(u16)sizeof(struct usb_qualifier_descriptor) );
++			memcpy( req->buf, &gs_qualifier_desc, ret );
++			break;
++
++		case USB_DT_OTHER_SPEED_CONFIG:
++#endif /* CONFIG_USB_GADGET_DUALSPEED */
++		case USB_DT_CONFIG:
++			ret = gs_build_config_desc( req->buf, gadget->speed,
++				ctrl->wValue >> 8, ctrl->wValue & 0xff );
++			if( ret >= 0 )
++				ret = min( ctrl->wLength, (u16)ret );
++			break;
++
++		case USB_DT_STRING:
++			/* wIndex == language code. */
++			ret = usb_gadget_get_string( &gs_string_table,
++				ctrl->wValue & 0xff, req->buf );
++			if( ret >= 0 )
++				ret = min( ctrl->wLength, (u16)ret );
++			break;
++		}
++		break;
++
++	case USB_REQ_SET_CONFIGURATION:
++		if( ctrl->bRequestType != 0 )
++			break;
++		spin_lock( &dev->dev_lock );
++		ret = gs_set_config( dev, ctrl->wValue );
++		spin_unlock( &dev->dev_lock );
++		break;
++
++	case USB_REQ_GET_CONFIGURATION:
++		if( ctrl->bRequestType != USB_DIR_IN )
++			break;
++		*(u8 *)req->buf = dev->dev_config;
++		ret = min( ctrl->wLength, (u16)1 );
++		break;
++
++	case USB_REQ_SET_INTERFACE:
++		if( ctrl->bRequestType != USB_RECIP_INTERFACE )
++			break;
++		spin_lock( &dev->dev_lock );
++		if( dev->dev_config == GS_BULK_CONFIG_ID
++		&& ctrl->wIndex == GS_INTERFACE_ID
++		&& ctrl->wValue == GS_ALT_INTERFACE_ID ) {
++			sv_config = dev->dev_config;
++			/* since there is only one interface, setting the */
++			/* interface is equivalent to setting the config */
++			gs_reset_config( dev );
++			gs_set_config( dev, sv_config );
++			ret = 0;
++		}
++		spin_unlock( &dev->dev_lock );
++		break;
++
++	case USB_REQ_GET_INTERFACE:
++		if( ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) )
++			break;
++		if( dev->dev_config == GS_NO_CONFIG_ID )
++			break;
++		if( ctrl->wIndex != GS_INTERFACE_ID ) {
++			ret = -EDOM;
++			break;
++		}
++		*(u8 *)req->buf = GS_ALT_INTERFACE_ID;
++		ret = min( ctrl->wLength, (u16)1 );
++		break;
++
++	default:
++		printk( KERN_ERR "gs_setup: unknown request, type=%02x, request=%02x, value=%04x, index=%04x, length=%d\n",
++			ctrl->bRequestType, ctrl->bRequest, ctrl->wValue,
++			ctrl->wIndex, ctrl->wLength );
++		break;
++
++	}
++
++	/* respond with data transfer before status phase? */
++	if( ret >= 0 ) {
++		req->length = ret;
++		ret = usb_ep_queue( gadget->ep0, req, GFP_ATOMIC );
++		if( ret < 0 ) {
++			printk( KERN_ERR
++				"gs_setup: cannot queue response, ret=%d\n",
++				ret );
++			req->status = 0;
++			gs_setup_complete( gadget->ep0, req );
++		}
++	}
++
++	/* device either stalls (ret < 0) or reports success */
++	return( ret );
++
++}
++
++
++/*
++ * gs_setup_complete
++ */
++
++static void gs_setup_complete( struct usb_ep *ep, struct usb_request *req )
++{
++	if( req->status || req->actual != req->length ) {
++		printk( KERN_ERR "gs_setup_complete: status error, status=%d, actual=%d, length=%d\n",
++			req->status, req->actual, req->length );
++	}
++}
++
++
++/*
++ * gs_disconnect
++ *
++ * Called when the device is disconnected.  Frees the closed
++ * ports and disconnects open ports.  Open ports will be freed
++ * on close.  Then reallocates the ports for the next connection.
++ */
++
++static void gs_disconnect( struct usb_gadget *gadget )
++{
++
++	unsigned long flags;
++	struct gs_dev *dev = get_gadget_data( gadget );
++
++
++	spin_lock_irqsave( &dev->dev_lock, flags );
++
++	gs_reset_config( dev );
++
++	/* free closed ports and disconnect open ports */
++	/* (open ports will be freed when closed) */
++	gs_free_ports( dev );
++
++	/* re-allocate ports for the next connection */
++	if( gs_alloc_ports( dev, GFP_ATOMIC ) != 0 )
++		printk( KERN_ERR "gs_disconnect: cannot re-allocate ports\n" );
++
++	spin_unlock_irqrestore( &dev->dev_lock, flags );
++
++	printk( KERN_INFO "gs_disconnect: %s disconnected\n", GS_LONG_NAME );
++
++}
++
++
++/*
++ * gs_set_config
++ *
++ * Configures the device by enabling device specific
++ * optimizations, setting up the endpoints, allocating
++ * read and write requests and queuing read requests.
++ *
++ * The device lock must be held when calling this function.
++ */
++
++static int gs_set_config( struct gs_dev *dev, unsigned config )
++{
++
++	int i;
++	int ret = 0;
++	struct usb_gadget *gadget = dev->dev_gadget;
++	struct usb_ep *ep;
++	struct usb_request *req;
++	struct gs_req_entry *req_entry;
++
++
++	if( dev == NULL ) {
++		printk( KERN_ERR "gs_set_config: NULL device pointer\n" );
++		return( 0 );
++	}
++
++	if( config == dev->dev_config )
++		return( 0 );
++
++	gs_reset_config( dev );
++
++	if( config == GS_NO_CONFIG_ID )
++		return( 0 );
++
++	if( config != GS_BULK_CONFIG_ID )
++		return( -EINVAL );
++
++	/* device specific optimizations */
++	if (gadget_is_net2280(gadget))
++		net2280_set_fifo_mode(gadget, 1);
++
++	gadget_for_each_ep( ep, gadget ) {
++
++		if( strcmp( ep->name, EP_IN_NAME ) == 0 ) {
++			ret = usb_ep_enable( ep,
++				gadget->speed == USB_SPEED_HIGH ?
++ 				&gs_highspeed_in_desc : &gs_fullspeed_in_desc );
++			if( ret == 0 ) {
++				ep->driver_data = dev;
++				dev->dev_in_ep = ep;
++			} else {
++				printk( KERN_ERR "gs_set_config: cannot enable in endpoint %s, ret=%d\n",
++					ep->name, ret );
++				gs_reset_config( dev );
++				return( ret );
++			}
++		}
++
++		else if( strcmp( ep->name, EP_OUT_NAME ) == 0 ) {
++			ret = usb_ep_enable( ep,
++				gadget->speed == USB_SPEED_HIGH ?
++				&gs_highspeed_out_desc :
++				&gs_fullspeed_out_desc );
++			if( ret == 0 ) {
++				ep->driver_data = dev;
++				dev->dev_out_ep = ep;
++			} else {
++				printk( KERN_ERR "gs_set_config: cannot enable out endpoint %s, ret=%d\n",
++					ep->name, ret );
++				gs_reset_config( dev );
++				return( ret );
++			}
++		}
++
++	}
++
++	if( dev->dev_in_ep == NULL || dev->dev_out_ep == NULL ) {
++		gs_reset_config( dev );
++		printk( KERN_ERR "gs_set_config: cannot find endpoints\n" );
++		return( -ENODEV );
++	}
++
++	/* allocate and queue read requests */
++	ep = dev->dev_out_ep;
++	for( i=0; i<read_q_size && ret == 0; i++ ) {
++		if( (req=gs_alloc_req( ep, ep->maxpacket, GFP_ATOMIC )) ) {
++			req->complete = gs_read_complete;
++			if( (ret=usb_ep_queue( ep, req, GFP_ATOMIC )) ) {
++				printk( KERN_ERR "gs_set_config: cannot queue read request, ret=%d\n",
++					ret );
++			}
++		} else {
++			gs_reset_config( dev );
++			printk( KERN_ERR
++			"gs_set_config: cannot allocate read requests\n" );
++			return( -ENOMEM );
++		}
++	}
++
++	/* allocate write requests, and put on free list */
++	ep = dev->dev_in_ep;
++	for( i=0; i<write_q_size; i++ ) {
++		if( (req_entry=gs_alloc_req_entry( ep, ep->maxpacket,
++		GFP_ATOMIC )) ) {
++			req_entry->re_req->complete = gs_write_complete;
++			list_add( &req_entry->re_entry, &dev->dev_req_list );
++		} else {
++			gs_reset_config( dev );
++			printk( KERN_ERR
++			"gs_set_config: cannot allocate write requests\n" );
++			return( -ENOMEM );
++		}
++	}
++
++	dev->dev_config = config;
++
++	printk( KERN_INFO "gs_set_config: %s configured for %s speed\n",
++		GS_LONG_NAME,
++		gadget->speed == USB_SPEED_HIGH ? "high" : "full" );
++
++	return( 0 );
++
++}
++
++
++/*
++ * gs_reset_config
++ *
++ * Mark the device as not configured, disable all endpoints,
++ * which forces completion of pending I/O and frees queued
++ * requests, and free the remaining write requests on the
++ * free list.
++ *
++ * The device lock must be held when calling this function.
++ */
++
++static void gs_reset_config( struct gs_dev *dev )
++{
++
++	struct gs_req_entry *req_entry;
++
++
++	if( dev == NULL ) {
++		printk( KERN_ERR "gs_reset_config: NULL device pointer\n" );
++		return;
++	}
++
++	if( dev->dev_config == GS_NO_CONFIG_ID )
++		return;
++
++	dev->dev_config = GS_NO_CONFIG_ID;
++
++	/* free write requests on the free list */
++	while( !list_empty( &dev->dev_req_list ) ) {
++		req_entry = list_entry( dev->dev_req_list.next,
++			struct gs_req_entry, re_entry );
++		list_del( &req_entry->re_entry );
++		gs_free_req_entry( dev->dev_in_ep, req_entry );
++	}
++
++	/* disable endpoints, forcing completion of pending i/o; */
++	/* completion handlers free their requests in this case */
++	if( dev->dev_in_ep ) {
++		usb_ep_disable( dev->dev_in_ep );
++		dev->dev_in_ep = NULL;
++	}
++	if( dev->dev_out_ep ) {
++		usb_ep_disable( dev->dev_out_ep );
++		dev->dev_out_ep = NULL;
++	}
++
++}
++
++
++/*
++ * gs_build_config_desc
++ *
++ * Builds a config descriptor in the given buffer and returns the
++ * length, or a negative error number.
++ */
++
++static int gs_build_config_desc( u8 *buf, enum usb_device_speed speed,
++		u8 type, unsigned int index )
++{
++
++	int high_speed;
++	int len = USB_DT_CONFIG_SIZE + USB_DT_INTERFACE_SIZE
++				+ GS_NUM_ENDPOINTS * USB_DT_ENDPOINT_SIZE;
++
++
++	/* only one config */
++	if( index != 0 )
++		return( -EINVAL );
++
++	memcpy( buf, &gs_config_desc, USB_DT_CONFIG_SIZE );
++	((struct usb_config_descriptor *)buf)->bDescriptorType = type;
++	((struct usb_config_descriptor *)buf)->wTotalLength =
++		__constant_cpu_to_le16( len );
++	buf += USB_DT_CONFIG_SIZE;
++
++	memcpy( buf, &gs_interface_desc, USB_DT_INTERFACE_SIZE );
++	buf += USB_DT_INTERFACE_SIZE;
++
++	/* other speed switches high and full speed */
++	high_speed = (speed == USB_SPEED_HIGH);
++	if( type == USB_DT_OTHER_SPEED_CONFIG )
++		high_speed = !high_speed;
++
++	memcpy( buf,
++		high_speed ? &gs_highspeed_in_desc : &gs_fullspeed_in_desc,
++		USB_DT_ENDPOINT_SIZE );
++	buf += USB_DT_ENDPOINT_SIZE;
++	memcpy( buf,
++		high_speed ? &gs_highspeed_out_desc : &gs_fullspeed_out_desc,
++		USB_DT_ENDPOINT_SIZE );
++
++	return( len );
++
++}
++
++
++/*
++ * gs_alloc_req
++ *
++ * Allocate a usb_request and its buffer.  Returns a pointer to the
++ * usb_request or NULL if there is an error.
++ */
++
++static struct usb_request *gs_alloc_req( struct usb_ep *ep, unsigned int len,
++	int kmalloc_flags )
++{
++
++	struct usb_request *req;
++
++
++	if( ep == NULL )
++		return( NULL );
++
++	req = usb_ep_alloc_request( ep, kmalloc_flags );
++
++	if( req != NULL ) {
++		req->length = len;
++		req->buf = usb_ep_alloc_buffer( ep, len, &req->dma,
++			kmalloc_flags );
++		if( req->buf == NULL ) {
++			usb_ep_free_request( ep, req );
++			return( NULL );
++		}
++	}
++
++	return( req );
++
++}
++
++
++/*
++ * gs_free_req
++ *
++ * Free a usb_request and its buffer.
++ */
++
++static void gs_free_req( struct usb_ep *ep, struct usb_request *req )
++{
++	if( ep != NULL && req != NULL ) {
++		if( req->buf != NULL )
++			usb_ep_free_buffer( ep, req->buf, req->dma,
++				req->length );
++		usb_ep_free_request( ep, req );
++	}
++}
++
++
++/*
++ * gs_alloc_req_entry
++ *
++ * Allocates a request and its buffer, using the given
++ * endpoint, buffer len, and kmalloc flags.
++ */
++
++static struct gs_req_entry *gs_alloc_req_entry( struct usb_ep *ep,
++	unsigned len, int kmalloc_flags )
++{
++
++	struct gs_req_entry	*req;
++
++
++	req = kmalloc( sizeof(struct gs_req_entry), kmalloc_flags );
++	if( req == NULL )
++		return( NULL );
++
++	req->re_req = gs_alloc_req( ep, len, kmalloc_flags );
++	if( req->re_req == NULL ) {
++		kfree( req );
++		return( NULL );
++	}
++
++	req->re_req->context = req;
++
++	return( req );
++
++}
++
++
++/*
++ * gs_free_req_entry
++ *
++ * Frees a request and its buffer.
++ */
++
++static void gs_free_req_entry( struct usb_ep *ep, struct gs_req_entry *req )
++{
++	if( ep != NULL && req != NULL ) {
++		if( req->re_req != NULL )
++			gs_free_req( ep, req->re_req );
++		kfree( req );
++	}
++}
++
++
++/*
++ * gs_alloc_ports
++ *
++ * Allocate all ports and set the gs_dev struct to point to them.
++ * Return 0 if successful, or a negative error number.
++ *
++ * The device lock is normally held when calling this function.
++ */
++
++static int gs_alloc_ports( struct gs_dev *dev, int kmalloc_flags )
++{
++
++	int i;
++	struct gs_port *port;
++
++
++	if( dev == NULL )
++		return( -EIO );
++
++	for( i=0; i<GS_NUM_PORTS; i++ ) {
++
++		if( (port=(struct gs_port *)kmalloc( sizeof(struct gs_port),
++		kmalloc_flags )) == NULL )
++			return( -ENOMEM );
++
++		memset( port, 0, sizeof( struct gs_port ) );
++		port->port_dev = dev;
++		port->port_num = i;
++		spin_lock_init( &port->port_lock );
++    	init_waitqueue_head( &port->port_write_wait );
++
++		dev->dev_port[i] = port;
++
++	}
++
++	return( 0 );
++
++}
++
++
++/*
++ * gs_free_ports
++ *
++ * Free all closed ports.  Open ports are disconnected by
++ * freeing their write buffers, setting their device pointers
++ * and the pointers to them in the device to NULL.  These
++ * ports will be freed when closed.
++ *
++ * The device lock is normally held when calling this function.
++ */
++
++static void gs_free_ports( struct gs_dev *dev )
++{
++
++	int i;
++	unsigned long flags;
++	struct gs_port *port;
++
++
++	if( dev == NULL )
++		return;
++
++	for( i=0; i<GS_NUM_PORTS; i++ ) {
++
++		if( (port=dev->dev_port[i]) != NULL ) {
++
++			dev->dev_port[i] = NULL;
++
++			spin_lock_irqsave(&port->port_lock, flags );
++
++			if( port->port_write_buf != NULL ) {
++				gs_buf_free( port->port_write_buf );
++				port->port_write_buf = NULL;
++			}
++
++			if( port->port_open_count > 0 || port->port_in_use ) {
++				port->port_dev = NULL;
++				wake_up_interruptible( &port->port_write_wait );
++				wake_up_interruptible( &port->port_tty->read_wait );
++				wake_up_interruptible( &port->port_tty->write_wait );
++			} else {
++				kfree( port );
++			}
++
++			spin_unlock_irqrestore(&port->port_lock, flags );
++
++		}
++
++	}
++
++}
++
++
++/* Circular Buffer */
++
++/*
++ * gs_buf_alloc
++ *
++ * Allocate a circular buffer and all associated memory.
++ */
++
++static struct gs_buf *gs_buf_alloc( unsigned int size, int kmalloc_flags )
++{
++
++	struct gs_buf *gb;
++
++
++	if( size == 0 )
++		return( NULL );
++
++	gb = (struct gs_buf *)kmalloc( sizeof(struct gs_buf), kmalloc_flags );
++	if( gb == NULL )
++		return( NULL );
++
++	gb->buf_buf = kmalloc( size, kmalloc_flags );
++	if( gb->buf_buf == NULL ) {
++		kfree( gb );
++		return( NULL );
++	}
++
++	gb->buf_size = size;
++	gb->buf_get = gb->buf_put = gb->buf_buf;
++
++	return( gb );
++
++}
++
++
++/*
++ * gs_buf_free
++ *
++ * Free the buffer and all associated memory.
++ */
++
++void gs_buf_free( struct gs_buf *gb )
++{
++	if( gb != NULL ) {
++		if( gb->buf_buf != NULL )
++			kfree( gb->buf_buf );
++		kfree( gb );
++	}
++}
++
++
++/*
++ * gs_buf_clear
++ *
++ * Clear out all data in the circular buffer.
++ */
++
++void gs_buf_clear( struct gs_buf *gb )
++{
++	if( gb != NULL )
++		gb->buf_get = gb->buf_put;
++		/* equivalent to a get of all data available */
++}
++
++
++/*
++ * gs_buf_data_avail
++ *
++ * Return the number of bytes of data available in the circular
++ * buffer.
++ */
++
++unsigned int gs_buf_data_avail( struct gs_buf *gb )
++{
++	if( gb != NULL )
++		return( (gb->buf_size + gb->buf_put - gb->buf_get)
++			% gb->buf_size );
++	else
++		return( 0 );
++}
++
++
++/*
++ * gs_buf_space_avail
++ *
++ * Return the number of bytes of space available in the circular
++ * buffer.
++ */
++
++unsigned int gs_buf_space_avail( struct gs_buf *gb )
++{
++	if( gb != NULL )
++		return( (gb->buf_size + gb->buf_get - gb->buf_put - 1)
++			% gb->buf_size );
++	else
++		return( 0 );
++}
++
++
++/*
++ * gs_buf_put
++ *
++ * Copy data data from a user buffer and put it into the circular buffer.
++ * Restrict to the amount of space available.
++ *
++ * Return the number of bytes copied.
++ */
++
++unsigned int gs_buf_put( struct gs_buf *gb, const char *buf,
++	unsigned int count )
++{
++
++	unsigned int len;
++
++
++	if( gb == NULL )
++		return( 0 );
++
++	len  = gs_buf_space_avail( gb );
++	if( count > len )
++		count = len;
++
++	if( count == 0 )
++		return( 0 );
++
++	len = gb->buf_buf + gb->buf_size - gb->buf_put;
++	if( count > len ) {
++		memcpy( gb->buf_put, buf, len );
++		memcpy( gb->buf_buf, buf+len, count - len );
++		gb->buf_put = gb->buf_buf + count - len;
++	} else {
++		memcpy( gb->buf_put, buf, count );
++		if( count < len )
++			gb->buf_put += count;
++		else /* count == len */
++			gb->buf_put = gb->buf_buf;
++	}
++
++	return( count );
++
++}
++
++
++/*
++ * gs_buf_get
++ *
++ * Get data from the circular buffer and copy to the given buffer.
++ * Restrict to the amount of data available.
++ *
++ * Return the number of bytes copied.
++ */
++
++unsigned int gs_buf_get( struct gs_buf *gb, char *buf, unsigned int count )
++{
++
++	unsigned int len;
++
++
++	if( gb == NULL )
++		return( 0 );
++
++	len = gs_buf_data_avail( gb );
++	if( count > len )
++		count = len;
++
++	if( count == 0 )
++		return( 0 );
++
++	len = gb->buf_buf + gb->buf_size - gb->buf_get;
++	if( count > len ) {
++		memcpy( buf, gb->buf_get, len );
++		memcpy( buf+len, gb->buf_buf, count - len );
++		gb->buf_get = gb->buf_buf + count - len;
++	} else {
++		memcpy( buf, gb->buf_get, count );
++		if( count < len )
++			gb->buf_get += count;
++		else /* count == len */
++			gb->buf_get = gb->buf_buf;
++	}
++
++	return( count );
++
++}
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/inode.c kernel/drivers/usb/gadget/inode.c
+--- /tmp/kernel/drivers/usb/gadget/inode.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/inode.c	2005-04-22 17:53:19.456535934 +0200
+@@ -0,0 +1,1807 @@
++/*
++ * inode.c -- user mode filesystem api for usb gadget controllers
++ *
++ * Copyright (C) 2003 David Brownell
++ * Copyright (C) 2003 Agilent Technologies
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++
++#define	DEBUG 1			/* data to help fault diagnosis */
++// #define	VERBOSE		/* extra debug messages (success too) */
++
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/fs.h>
++#include <linux/pagemap.h>
++#include <linux/uts.h>
++#include <linux/version.h>
++#include <linux/wait.h>
++#include <linux/compiler.h>
++#include <asm/uaccess.h>
++#include <linux/slab.h>
++
++#ifndef BUG_ON
++#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
++#endif
++
++#include <linux/usb_gadgetfs.h>
++#include <linux/usb_gadget.h>
++
++
++/*
++ * The gadgetfs API maps each endpoint to a file descriptor so that you
++ * can use standard synchronous read/write calls for I/O.  There's some
++ * O_NONBLOCK and O_ASYNC/FASYNC style i/o support.  Example usermode
++ * drivers show how this works in practice.
++ *
++ * Key parts that must be USB-specific are protocols defining how the
++ * read/write operations relate to the hardware state machines.  There
++ * are two types of files.  One type is for the device, implementing ep0.
++ * The other type is for each IN or OUT endpoint.  In both cases, the
++ * user mode driver must configure the hardware before using it.
++ *
++ * - First, dev_config() is called when /dev/gadget/$CHIP is configured
++ *   (by writing configuration and device descriptors).  Afterwards it
++ *   may serve as a source of device events, used to handle all control
++ *   requests other than basic enumeration.
++ *
++ * - Then either immediately, or after a SET_CONFIGURATION control request,
++ *   ep_config() is called when each /dev/gadget/ep* file is configured
++ *   (by writing endpoint descriptors).  Afterwards these files are used
++ *   to write() IN data or to read() OUT data.  To halt the endpoint, a
++ *   "wrong direction" request is issued (like reading an IN endpoint).
++ *
++ * Unlike "usbfs" the only ioctl()s are for things that are rare, and maybe
++ * not possible on all hardware.  For example, precise fault handling with
++ * respect to data left in endpoint fifos after aborted operations; or
++ * selective clearing of endpoint halts, to implement SET_INTERFACE.
++ */
++
++#define	DRIVER_DESC	"USB Gadget filesystem"
++#define	DRIVER_VERSION	"20 Aug 2003"
++
++static const char driver_desc [] = DRIVER_DESC;
++static const char shortname [] = "gadgetfs";
++
++MODULE_DESCRIPTION (DRIVER_DESC);
++MODULE_AUTHOR ("David Brownell");
++MODULE_LICENSE ("GPL");
++
++
++/*----------------------------------------------------------------------*/
++
++#define GADGETFS_MAGIC		0xaee71ee7
++#define DMA_ADDR_INVALID	(~(dma_addr_t)0)
++
++/* /dev/gadget/$CHIP represents ep0 and the whole device */
++enum ep0_state {
++	/* DISBLED is the initial state.
++	 */
++	STATE_DEV_DISABLED = 0,
++
++	/* Only one open() of /dev/gadget/$CHIP; only one file tracks
++	 * ep0/device i/o modes and binding to the controller.  Driver
++	 * must always write descriptors to initialize the device, then
++	 * the device becomes UNCONNECTED until enumeration.
++	 */
++	STATE_OPENED,
++
++	/* From then on, ep0 fd is in either of two basic modes:
++	 * - (UN)CONNECTED: read usb_gadgetfs_event(s) from it
++	 * - SETUP: read/write will transfer control data and succeed;
++	 *   or if "wrong direction", performs protocol stall
++	 */
++	STATE_UNCONNECTED,
++	STATE_CONNECTED,
++	STATE_SETUP,
++
++	/* UNBOUND means the driver closed ep0, so the device won't be
++	 * accessible again (DEV_DISABLED) until all fds are closed.
++	 */
++	STATE_DEV_UNBOUND,
++};
++
++/* enough for the whole queue: most events invalidate others */
++#define	N_EVENT			5
++
++struct dev_data {
++	spinlock_t			lock;
++	atomic_t			count;
++	enum ep0_state			state;
++	struct usb_gadgetfs_event	event [N_EVENT];
++	unsigned			ev_next;
++	struct fasync_struct		*fasync;
++	u8				current_config;
++
++	/* drivers reading ep0 MUST handle control requests (SETUP)
++	 * reported that way; else the host will time out.
++	 */
++	unsigned			usermode_setup : 1,
++					setup_in : 1,
++					setup_can_stall : 1,
++					setup_out_ready : 1,
++					setup_out_error : 1,
++					setup_abort : 1;
++
++	/* the rest is basically write-once */
++	struct usb_config_descriptor	*config, *hs_config;
++	struct usb_device_descriptor	*dev;
++	struct usb_request		*req;
++	struct usb_gadget		*gadget;
++	struct list_head		epfiles;
++	void				*buf;
++	wait_queue_head_t		wait;
++	struct super_block		*sb;
++	struct dentry			*dentry;
++
++	/* except this scratch i/o buffer for ep0 */
++	u8				rbuf [256];
++};
++
++static inline void get_dev (struct dev_data *data)
++{
++	atomic_inc (&data->count);
++}
++
++static void put_dev (struct dev_data *data)
++{
++	if (likely (!atomic_dec_and_test (&data->count)))
++		return;
++	/* needs no more cleanup */
++	BUG_ON (waitqueue_active (&data->wait));
++	kfree (data);
++}
++
++static struct dev_data *dev_new (void)
++{
++	struct dev_data		*dev;
++
++	dev = kmalloc (sizeof *dev, GFP_KERNEL);
++	if (!dev)
++		return 0;
++	memset (dev, 0, sizeof *dev);
++	dev->state = STATE_DEV_DISABLED;
++	atomic_set (&dev->count, 1);
++	spin_lock_init (&dev->lock);
++	INIT_LIST_HEAD (&dev->epfiles);
++	init_waitqueue_head (&dev->wait);
++	return dev;
++}
++
++/*----------------------------------------------------------------------*/
++
++/* other /dev/gadget/$ENDPOINT files represent endpoints */
++enum ep_state {
++	STATE_EP_DISABLED = 0,
++	STATE_EP_READY,
++	STATE_EP_DEFER_ENABLE,
++	STATE_EP_ENABLED,
++	STATE_EP_UNBOUND,
++};
++
++struct ep_data {
++	struct semaphore		lock;
++	enum ep_state			state;
++	atomic_t			count;
++	struct dev_data			*dev;
++	/* must hold dev->lock before accessing ep or req */
++	struct usb_ep			*ep;
++	struct usb_request		*req;
++	ssize_t				status;
++	char				name [16];
++	struct usb_endpoint_descriptor	desc, hs_desc;
++	struct list_head		epfiles;
++	wait_queue_head_t		wait;
++	struct dentry			*dentry;
++	struct inode			*inode;
++};
++
++static inline void get_ep (struct ep_data *data)
++{
++	atomic_inc (&data->count);
++}
++
++static void put_ep (struct ep_data *data)
++{
++	if (likely (!atomic_dec_and_test (&data->count)))
++		return;
++	put_dev (data->dev);
++	/* needs no more cleanup */
++	BUG_ON (!list_empty (&data->epfiles));
++	BUG_ON (waitqueue_active (&data->wait));
++	BUG_ON (down_trylock (&data->lock) != 0);
++	kfree (data);
++}
++
++/*----------------------------------------------------------------------*/
++
++/* most "how to use the hardware" policy choices are in userspace:
++ * mapping endpoint roles the driver needs to the capabilities that
++ * the usb controller exposes.
++ */
++
++	// FIXME the 2.6 version just probes the controller
++	// driver to find out the chip name; we should too.
++
++#ifdef	CONFIG_USB_GADGET_NET2280
++#define CHIP			"net2280"
++#define HIGHSPEED
++#endif
++
++#ifdef	CONFIG_USB_GADGET_PXA2XX
++#define CHIP			"pxa2xx_udc"
++/* earlier hardware doesn't have UDCCFR, races set_{config,interface} */
++#warning works best with pxa255 or newer
++#endif
++
++#ifdef	CONFIG_USB_GADGET_GOKU
++#define CHIP			"goku_udc"
++#endif
++
++#ifdef	CONFIG_USB_GADGET_SA1100
++#define CHIP			"sa1100"
++#endif
++
++#ifdef	CONFIG_USB_GADGET_SUPERH
++#define CHIP			"superh_udc"
++#endif
++
++#ifdef CONFIG_USB_GADGET_N9604
++#define CHIP			"n9604_udc"
++#endif
++
++
++/*----------------------------------------------------------------------*/
++
++/* NOTE:  don't use dev_printk calls before binding to the gadget
++ * at the end of ep0 configuration, or after unbind.
++ */
++
++/* too wordy: dev_printk(level , &(d)->gadget->dev , fmt , ## args) */
++#define xprintk(d,level,fmt,args...) \
++	printk(level "%s: " fmt , shortname , ## args)
++
++#ifdef DEBUG
++#define DBG(dev,fmt,args...) \
++	xprintk(dev , KERN_DEBUG , fmt , ## args)
++#else
++#define DBG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* DEBUG */
++
++#ifdef VERBOSE
++#define VDEBUG	DBG
++#else
++#define VDEBUG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* DEBUG */
++
++#define ERROR(dev,fmt,args...) \
++	xprintk(dev , KERN_ERR , fmt , ## args)
++#define WARN(dev,fmt,args...) \
++	xprintk(dev , KERN_WARNING , fmt , ## args)
++#define INFO(dev,fmt,args...) \
++	xprintk(dev , KERN_INFO , fmt , ## args)
++
++
++/*----------------------------------------------------------------------*/
++
++/* SYNCHRONOUS ENDPOINT OPERATIONS (bulk/intr/iso)
++ *
++ * After opening, configure non-control endpoints.  Then use normal
++ * stream read() and write() requests; and maybe ioctl() to get more
++ * precise FIFO status when recovering from cancelation.
++ */
++
++static void epio_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct ep_data	*epdata = ep->driver_data;
++
++	if (!req->context)
++		return;
++	if (req->status)
++		epdata->status = req->status;
++	else
++		epdata->status = req->actual;
++	complete ((struct completion *)req->context);
++}
++
++/* tasklock endpoint, returning when it's connected.
++ * still need dev->lock to use epdata->ep.
++ */
++static int
++get_ready_ep (unsigned f_flags, struct ep_data *epdata)
++{
++	int	val;
++
++	if (f_flags & O_NONBLOCK) {
++		if (down_trylock (&epdata->lock) != 0)
++			goto nonblock;
++		if (epdata->state != STATE_EP_ENABLED) {
++			up (&epdata->lock);
++nonblock:
++			val = -EAGAIN;
++		} else
++			val = 0;
++		return val;
++	}
++
++	if ((val = down_interruptible (&epdata->lock)) < 0)
++		return val;
++newstate:
++	switch (epdata->state) {
++	case STATE_EP_ENABLED:
++		break;
++	case STATE_EP_DEFER_ENABLE:
++		DBG (epdata->dev, "%s wait for host\n", epdata->name);
++		if ((val = wait_event_interruptible (epdata->wait, 
++				epdata->state != STATE_EP_DEFER_ENABLE
++				|| epdata->dev->state == STATE_DEV_UNBOUND
++				)) < 0)
++			goto fail;
++		goto newstate;
++	// case STATE_EP_DISABLED:		/* "can't happen" */
++	// case STATE_EP_READY:			/* "can't happen" */
++	default:				/* error! */
++		pr_debug ("%s: ep %p not available, state %d\n",
++				shortname, epdata, epdata->state);
++		// FALLTHROUGH
++	case STATE_EP_UNBOUND:			/* clean disconnect */
++		val = -ENODEV;
++fail:
++		up (&epdata->lock);
++	}
++	return val;
++}
++
++static ssize_t
++ep_io (struct ep_data *epdata, void *buf, unsigned len)
++{
++	DECLARE_COMPLETION (done);
++	int value;
++
++	spin_lock_irq (&epdata->dev->lock);
++	if (likely (epdata->ep != NULL)) {
++		struct usb_request	*req = epdata->req;
++
++		req->context = &done;
++		req->complete = epio_complete;
++		req->buf = buf;
++		req->length = len;
++		value = usb_ep_queue (epdata->ep, req, GFP_ATOMIC);
++	} else
++		value = -ENODEV;
++	spin_unlock_irq (&epdata->dev->lock);
++
++	if (likely (value == 0)) {
++		value = wait_event_interruptible (done.wait, done.done);
++		if (value != 0) {
++			spin_lock_irq (&epdata->dev->lock);
++			if (likely (epdata->ep != NULL)) {
++				DBG (epdata->dev, "%s i/o interrupted\n",
++						epdata->name);
++				usb_ep_dequeue (epdata->ep, epdata->req);
++				spin_unlock_irq (&epdata->dev->lock);
++
++				wait_event (done.wait, done.done);
++				if (epdata->status == -ECONNRESET)
++					epdata->status = -EINTR;
++			} else {
++				spin_unlock_irq (&epdata->dev->lock);
++
++				DBG (epdata->dev, "endpoint gone\n");
++				epdata->status = -ENODEV;
++			}
++		}
++		return epdata->status;
++	}
++	return value;
++}
++
++
++/* handle a synchronous OUT bulk/intr/iso transfer */
++static ssize_t
++ep_read (struct file *fd, char *buf, size_t len, loff_t *ptr)
++{
++	struct ep_data		*data = fd->private_data;
++	void			*kbuf;
++	ssize_t			value;
++
++	if ((value = get_ready_ep (fd->f_flags, data)) < 0)
++		return value;
++
++	/* halt any endpoint by doing a "wrong direction" i/o call */
++	if (data->desc.bEndpointAddress & USB_DIR_IN) {
++		if ((data->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
++				== USB_ENDPOINT_XFER_ISOC)
++			return -EINVAL;
++		DBG (data->dev, "%s halt\n", data->name);
++		spin_lock_irq (&data->dev->lock);
++		if (likely (data->ep != NULL))
++			usb_ep_set_halt (data->ep);
++		spin_unlock_irq (&data->dev->lock);
++		up (&data->lock);
++		return -EBADMSG;
++	}
++
++	/* FIXME readahead for O_NONBLOCK and poll(); careful with ZLPs */
++
++	value = -ENOMEM;
++	kbuf = kmalloc (len, SLAB_KERNEL);
++	if (unlikely (!kbuf))
++		goto free1;
++
++	value = ep_io (data, kbuf, len);
++	VDEBUG (data->dev, "%s read %d OUT, status %d\n",
++		data->name, len, value);
++	if (value >= 0 && copy_to_user (buf, kbuf, value))
++		value = -EFAULT;
++
++free1:
++	up (&data->lock);
++	kfree (kbuf);
++	return value;
++}
++
++/* handle a synchronous IN bulk/intr/iso transfer */
++static ssize_t
++ep_write (struct file *fd, const char *buf, size_t len, loff_t *ptr)
++{
++	struct ep_data		*data = fd->private_data;
++	void			*kbuf;
++	ssize_t			value;
++
++	if ((value = get_ready_ep (fd->f_flags, data)) < 0)
++		return value;
++
++	/* halt any endpoint by doing a "wrong direction" i/o call */
++	if (!(data->desc.bEndpointAddress & USB_DIR_IN)) {
++		if ((data->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
++				== USB_ENDPOINT_XFER_ISOC)
++			return -EINVAL;
++		DBG (data->dev, "%s halt\n", data->name);
++		spin_lock_irq (&data->dev->lock);
++		if (likely (data->ep != NULL))
++			usb_ep_set_halt (data->ep);
++		spin_unlock_irq (&data->dev->lock);
++		up (&data->lock);
++		return -EBADMSG;
++	}
++
++	/* FIXME writebehind for O_NONBLOCK and poll(), qlen = 1 */
++
++	value = -ENOMEM;
++	kbuf = kmalloc (len, SLAB_KERNEL);
++	if (!kbuf)
++		goto free1;
++	if (copy_from_user (kbuf, buf, len)) {
++		value = -EFAULT;
++		goto free1;
++	}
++
++	value = ep_io (data, kbuf, len);
++	VDEBUG (data->dev, "%s write %d IN, status %d\n",
++		data->name, len, value);
++free1:
++	up (&data->lock);
++	kfree (kbuf);
++	return value;
++}
++
++static int
++ep_release (struct inode *inode, struct file *fd)
++{
++	struct ep_data		*data = fd->private_data;
++
++	/* clean up if this can be reopened */
++	if (data->state != STATE_EP_UNBOUND) {
++		data->state = STATE_EP_DISABLED;
++		data->desc.bDescriptorType = 0;
++		data->hs_desc.bDescriptorType = 0;
++	}
++	put_ep (data);
++	return 0;
++}
++
++static int ep_ioctl (struct inode *inode, struct file *fd,
++		unsigned code, unsigned long value)
++{
++	struct ep_data		*data = fd->private_data;
++	int			status;
++
++	if ((status = get_ready_ep (fd->f_flags, data)) < 0)
++		return status;
++
++	spin_lock_irq (&data->dev->lock);
++	if (likely (data->ep != NULL)) {
++		switch (code) {
++		case GADGETFS_FIFO_STATUS:
++			status = usb_ep_fifo_status (data->ep);
++			break;
++		case GADGETFS_FIFO_FLUSH:
++			usb_ep_fifo_flush (data->ep);
++			break;
++		case GADGETFS_CLEAR_HALT:
++			status = usb_ep_clear_halt (data->ep);
++			break;
++		default:
++			status = -ENOTTY;
++		}
++	} else
++		status = -ENODEV;
++	spin_unlock_irq (&data->dev->lock);
++	up (&data->lock);
++	return status;
++}
++
++/* used after endpoint configuration */
++static struct file_operations ep_io_operations = {
++	.owner =	THIS_MODULE,
++	.read =		ep_read,
++	.write =	ep_write,
++	.ioctl =	ep_ioctl,
++	.release =	ep_release,
++
++	// .aio_read =	ep_aio_read,
++	// .aio_write =	ep_aio_write,
++};
++
++/* ENDPOINT INITIALIZATION
++ *
++ *     fd = open ("/dev/gadget/$ENDPOINT", O_RDWR)
++ *     status = write (fd, descriptors, sizeof descriptors)
++ *
++ * That write establishes the endpoint configuration, configuring
++ * the controller to process bulk, interrupt, or isochronous transfers
++ * at the right maxpacket size, and so on.
++ *
++ * The descriptors are message type 1, identified by a host order u32
++ * at the beginning of what's written.  Descriptor order is: full/low
++ * speed descriptor, then optional high speed descriptor.
++ */
++static ssize_t
++ep_config (struct file *fd, const char *buf, size_t len, loff_t *ptr)
++{
++	struct ep_data		*data = fd->private_data;
++	struct usb_ep		*ep;
++	u32			tag;
++	int			value;
++
++	if ((value = down_interruptible (&data->lock)) < 0)
++		return value;
++
++	if (data->state != STATE_EP_READY) {
++		value = -EL2HLT;
++		goto fail;
++	}
++
++	value = len;
++	if (len < USB_DT_ENDPOINT_SIZE + 4)
++		goto fail0;
++
++	/* we might need to change message format someday */
++	if (copy_from_user (&tag, buf, 4)) {
++		goto fail1;
++	}
++	if (tag != 1) {
++		DBG(data->dev, "config %s, bad tag %d\n", data->name, tag);
++		goto fail0;
++	}
++	buf += 4;
++	len -= 4;
++
++	/* NOTE:  audio endpoint extensions not accepted here;
++	 * just don't include the extra bytes.
++	 */
++
++	/* full/low speed descriptor, then high speed */
++	if (copy_from_user (&data->desc, buf, USB_DT_ENDPOINT_SIZE)) {
++		goto fail1;
++	}
++	if (data->desc.bLength != USB_DT_ENDPOINT_SIZE
++			|| data->desc.bDescriptorType != USB_DT_ENDPOINT)
++		goto fail0;
++	if (len != USB_DT_ENDPOINT_SIZE) {
++		if (len != 2 * USB_DT_ENDPOINT_SIZE)
++			goto fail0;
++		if (copy_from_user (&data->hs_desc, buf + USB_DT_ENDPOINT_SIZE,
++					USB_DT_ENDPOINT_SIZE)) {
++			goto fail1;
++		}
++		if (data->hs_desc.bLength != USB_DT_ENDPOINT_SIZE
++				|| data->hs_desc.bDescriptorType
++					!= USB_DT_ENDPOINT) {
++			DBG(data->dev, "config %s, bad hs length or type\n",
++					data->name);
++			goto fail0;
++		}
++	}
++	value = len;
++
++	spin_lock_irq (&data->dev->lock);
++	if (data->dev->state == STATE_DEV_UNBOUND) {
++		value = -ENOENT;
++		goto gone;
++	} else if ((ep = data->ep) == NULL) {
++		value = -ENODEV;
++		goto gone;
++	}
++	switch (data->dev->gadget->speed) {
++	case USB_SPEED_LOW:
++	case USB_SPEED_FULL:
++		value = usb_ep_enable (ep, &data->desc);
++		if (value == 0)
++			data->state = STATE_EP_ENABLED;
++		break;
++#ifdef	HIGHSPEED
++	case USB_SPEED_HIGH:
++		/* fails if caller didn't provide that descriptor... */
++		value = usb_ep_enable (ep, &data->hs_desc);
++		if (value == 0)
++			data->state = STATE_EP_ENABLED;
++		break;
++#endif
++	default:
++		DBG (data->dev, "unconnected, %s init deferred\n",
++				data->name);
++		data->state = STATE_EP_DEFER_ENABLE;
++	}
++	if (value == 0)
++		fd->f_op = &ep_io_operations;
++gone:
++	spin_unlock_irq (&data->dev->lock);
++	if (value < 0) {
++fail:
++		data->desc.bDescriptorType = 0;
++		data->hs_desc.bDescriptorType = 0;
++	}
++	up (&data->lock);
++	return value;
++fail0:
++	value = -EINVAL;
++	goto fail;
++fail1:
++	value = -EFAULT;
++	goto fail;
++}
++
++static int
++ep_open (struct inode *inode, struct file *fd)
++{
++	struct ep_data		*data = inode->u.generic_ip;
++	int			value = -EBUSY;
++
++	if (down_interruptible (&data->lock) != 0)
++		return -EINTR;
++	spin_lock_irq (&data->dev->lock);
++	if (data->dev->state == STATE_DEV_UNBOUND)
++		value = -ENOENT;
++	else if (data->state == STATE_EP_DISABLED) {
++		value = 0;
++		data->state = STATE_EP_READY;
++		get_ep (data);
++		fd->private_data = data;
++		VDEBUG (data->dev, "%s ready\n", data->name);
++	} else
++		DBG (data->dev, "%s state %d\n",
++			data->name, data->state);
++	spin_unlock_irq (&data->dev->lock);
++	up (&data->lock);
++	return value;
++}
++
++/* used before endpoint configuration */
++static struct file_operations ep_config_operations = {
++	.owner =	THIS_MODULE,
++	.open =		ep_open,
++	.write =	ep_config,
++	.release =	ep_release,
++};
++
++/*----------------------------------------------------------------------*/
++
++/* EP0 IMPLEMENTATION can be partly in userspace.
++ *
++ * Drivers that use this facility receive various events, including
++ * control requests the kernel doesn't handle.  Drivers that don't
++ * use this facility may be too simple-minded for real applications.
++ */
++
++static inline void ep0_readable (struct dev_data *dev)
++{
++	wake_up (&dev->wait);
++	kill_fasync (&dev->fasync, SIGIO, POLL_IN);
++}
++
++static void clean_req (struct usb_ep *ep, struct usb_request *req)
++{
++	struct dev_data		*dev = ep->driver_data;
++
++	if (req->buf != dev->rbuf) {
++		usb_ep_free_buffer (ep, req->buf, req->dma, req->length);
++		req->buf = dev->rbuf;
++		req->dma = DMA_ADDR_INVALID;
++	}
++	req->complete = epio_complete;
++	dev->setup_out_ready = 0;
++}
++
++static void ep0_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct dev_data		*dev = ep->driver_data;
++	int			free = 1;
++
++	/* for control OUT, data must still get to userspace */
++	if (!dev->setup_in) {
++		dev->setup_out_error = (req->status != 0);
++		if (!dev->setup_out_error)
++			free = 0;
++		dev->setup_out_ready = 1;
++		ep0_readable (dev);
++	} else if (dev->state == STATE_SETUP)
++		dev->state = STATE_CONNECTED;
++
++	/* clean up as appropriate */
++	if (free && req->buf != &dev->rbuf)
++		clean_req (ep, req);
++	req->complete = epio_complete;
++}
++
++static int setup_req (struct usb_ep *ep, struct usb_request *req, u16 len)
++{
++	struct dev_data	*dev = ep->driver_data;
++
++	if (dev->setup_out_ready) {
++		DBG (dev, "ep0 request busy!\n");
++		return -EBUSY;
++	}
++	if (len > sizeof (dev->rbuf))
++		req->buf = usb_ep_alloc_buffer (ep, len, &req->dma, GFP_ATOMIC);
++	if (req->buf == 0) {
++		req->buf = dev->rbuf;
++		return -ENOMEM;
++	}
++	req->complete = ep0_complete;
++	req->length = len;
++	return 0;
++}
++
++static ssize_t
++ep0_read (struct file *fd, char *buf, size_t len, loff_t *ptr)
++{
++	struct dev_data			*dev = fd->private_data;
++	ssize_t				retval;
++	enum ep0_state			state;
++
++	spin_lock_irq (&dev->lock);
++
++	/* report fd mode change before acting on it */
++	if (dev->setup_abort) {
++		dev->setup_abort = 0;
++		retval = -EIDRM;
++		goto done;
++	}
++
++	/* control DATA stage */
++	if ((state = dev->state) == STATE_SETUP) {
++
++		if (dev->setup_in) {		/* stall IN */
++			VDEBUG(dev, "ep0in stall\n");
++			(void) usb_ep_set_halt (dev->gadget->ep0);
++			retval = -EL2HLT;
++			dev->state = STATE_CONNECTED;
++
++		} else if (len == 0) {		/* ack SET_CONFIGURATION etc */
++			struct usb_ep		*ep = dev->gadget->ep0;
++			struct usb_request	*req = dev->req;
++
++			if ((retval = setup_req (ep, req, 0)) == 0)
++				retval = usb_ep_queue (ep, req, GFP_ATOMIC);
++			dev->state = STATE_CONNECTED;
++
++		} else {			/* collect OUT data */
++			if ((fd->f_flags & O_NONBLOCK) != 0
++					&& !dev->setup_out_ready) {
++				retval = -EAGAIN;
++				goto done;
++			}
++			spin_unlock_irq (&dev->lock);
++			retval = wait_event_interruptible (dev->wait,
++					dev->setup_out_ready != 0);
++
++			/* FIXME state could change from under us */
++			spin_lock_irq (&dev->lock);
++			if (retval)
++				goto done;
++			if (dev->setup_out_error)
++				retval = -EIO;
++			else {
++				len = min (len, dev->req->actual);
++// FIXME don't call this with the spinlock held ...
++				if (copy_to_user (buf, &dev->req->buf, len))
++					retval = -EFAULT;
++				clean_req (dev->gadget->ep0, dev->req);
++				/* NOTE userspace can't yet choose to stall */
++			}
++		}
++		goto done;
++	}
++
++	/* else normal: return event data */
++	if (len < sizeof dev->event [0]) {
++		retval = -EINVAL;
++		goto done;
++	}
++	len -= len % sizeof (struct usb_gadgetfs_event);
++	dev->usermode_setup = 1;
++
++scan:
++	/* return queued events right away */
++	if (dev->ev_next != 0) {
++		unsigned		i, n;
++		int			tmp = dev->ev_next;
++
++		len = min (len, tmp * sizeof (struct usb_gadgetfs_event));
++		n = len / sizeof (struct usb_gadgetfs_event);
++
++		/* ep0 can't deliver events when STATE_SETUP */
++		for (i = 0; i < n; i++) {
++			if (dev->event [i].type == GADGETFS_SETUP) {
++				len = n = i + 1;
++				len *= sizeof (struct usb_gadgetfs_event);
++				n = 0;
++				break;
++			}
++		}
++		spin_unlock_irq (&dev->lock);
++		if (copy_to_user (buf, &dev->event, len))
++			retval = -EFAULT;
++		else
++			retval = len;
++		if (len > 0) {
++			len /= sizeof (struct usb_gadgetfs_event);
++
++			/* NOTE this doesn't guard against broken drivers;
++			 * concurrent ep0 readers may lose events.
++			 */
++			spin_lock_irq (&dev->lock);
++			dev->ev_next -= len;
++			if (dev->ev_next != 0)
++				memmove (&dev->event, &dev->event [len],
++					sizeof (struct usb_gadgetfs_event)
++						* (tmp - len));
++			if (n == 0)
++				dev->state = STATE_SETUP;
++			spin_unlock_irq (&dev->lock);
++		}
++		return retval;
++	}
++	if (fd->f_flags & O_NONBLOCK) {
++		retval = -EAGAIN;
++		goto done;
++	}
++
++	switch (state) {
++	default:
++		DBG (dev, "fail %s, state %d\n", __FUNCTION__, state);
++		retval = -ESRCH;
++		break;
++	case STATE_UNCONNECTED:
++	case STATE_CONNECTED:
++		spin_unlock_irq (&dev->lock);
++		DBG (dev, "%s wait\n", __FUNCTION__);
++
++		/* wait for events */
++		retval = wait_event_interruptible (dev->wait,
++				dev->ev_next != 0);
++		if (retval < 0)
++			return retval;
++		spin_lock_irq (&dev->lock);
++		goto scan;
++	}
++
++done:
++	spin_unlock_irq (&dev->lock);
++	return retval;
++}
++
++static struct usb_gadgetfs_event *
++next_event (struct dev_data *dev, enum usb_gadgetfs_event_type type)
++{
++	struct usb_gadgetfs_event	*event;
++	unsigned			i;
++
++	switch (type) {
++	/* these events purge the queue */
++	case GADGETFS_DISCONNECT:
++		if (dev->state == STATE_SETUP)
++			dev->setup_abort = 1;
++		// FALL THROUGH
++	case GADGETFS_CONNECT:
++		dev->ev_next = 0;
++		break;
++	case GADGETFS_SETUP:		/* previous request timed out */
++	case GADGETFS_SUSPEND:		/* same effect */
++		/* these events can't be repeated */
++		for (i = 0; i != dev->ev_next; i++) {
++			if (dev->event [i].type != type)
++				continue;
++			DBG (dev, "discard old event %d\n", type);
++			dev->ev_next--;
++			if (i == dev->ev_next)
++				break;
++			/* indices start at zero, for simplicity */
++			memmove (&dev->event [i], &dev->event [i + 1],
++				sizeof (struct usb_gadgetfs_event)
++					* (dev->ev_next - i));
++		}
++		break;
++	default:
++		BUG ();
++	}
++	event = &dev->event [dev->ev_next++];
++	BUG_ON (dev->ev_next > N_EVENT);
++	VDEBUG (dev, "ev %d, next %d\n", type, dev->ev_next);
++	memset (event, 0, sizeof *event);
++	event->type = type;
++	return event;
++}
++
++static ssize_t
++ep0_write (struct file *fd, const char *buf, size_t len, loff_t *ptr)
++{
++	struct dev_data		*dev = fd->private_data;
++	ssize_t			retval = -ESRCH;
++
++	spin_lock_irq (&dev->lock);
++
++	/* report fd mode change before acting on it */
++	if (dev->setup_abort) {
++		dev->setup_abort = 0;
++		retval = -EIDRM;
++
++	/* data and/or status stage for control request */
++	} else if (dev->state == STATE_SETUP) {
++
++		/* IN DATA+STATUS caller makes len <= wLength */
++		if (dev->setup_in) {
++			retval = setup_req (dev->gadget->ep0, dev->req, len);
++			if (retval == 0) {
++				spin_unlock_irq (&dev->lock);
++				if (copy_from_user (dev->req->buf, buf, len))
++					retval = -EFAULT;
++				else
++					retval = usb_ep_queue (
++						dev->gadget->ep0, dev->req,
++						GFP_KERNEL);
++				if (retval < 0) {
++					spin_lock_irq (&dev->lock);
++					clean_req (dev->gadget->ep0, dev->req);
++					spin_unlock_irq (&dev->lock);
++				} else
++					retval = len;
++
++				return retval;
++			}
++
++		/* can stall some OUT transfers */
++		} else if (dev->setup_can_stall) {
++			VDEBUG(dev, "ep0out stall\n");
++			(void) usb_ep_set_halt (dev->gadget->ep0);
++			retval = -EL2HLT;
++			dev->state = STATE_CONNECTED;
++		} else {
++			DBG(dev, "bogus ep0out stall!\n");
++		}
++	} else
++		DBG (dev, "fail %s, state %d\n", __FUNCTION__, dev->state);
++
++	spin_unlock_irq (&dev->lock);
++	return retval;
++}
++
++static int
++ep0_fasync (int f, struct file *fd, int on)
++{
++	struct dev_data		*dev = fd->private_data;
++	// caller must F_SETOWN before signal delivery happens
++	VDEBUG (dev, "%s %s\n", __FUNCTION__, on ? "on" : "off");
++	return fasync_helper (f, fd, on, &dev->fasync);
++}
++
++static struct usb_gadget_driver gadgetfs_driver;
++
++static int
++dev_release (struct inode *inode, struct file *fd)
++{
++	struct dev_data		*dev = fd->private_data;
++
++	/* closing ep0 === shutdown all */
++
++	usb_gadget_unregister_driver (&gadgetfs_driver);
++
++	/* at this point "good" hardware has disconnected the
++	 * device from USB; the host won't see it any more.
++	 * alternatively, all host requests will time out.
++	 */
++
++	fasync_helper (-1, fd, 0, &dev->fasync);
++	kfree (dev->buf);
++	dev->buf = 0;
++	put_dev (dev);
++
++	/* other endpoints were all decoupled from this device */
++	dev->state = STATE_DEV_DISABLED;
++	return 0;
++}
++
++static int dev_ioctl (struct inode *inode, struct file *fd,
++		unsigned code, unsigned long value)
++{
++	struct dev_data		*dev = fd->private_data;
++	struct usb_gadget	*gadget = dev->gadget;
++
++	if (gadget->ops->ioctl)
++		return gadget->ops->ioctl (gadget, code, value);
++	return -ENOTTY;
++}
++
++/* used after device configuration */
++static struct file_operations ep0_io_operations = {
++	.owner =	THIS_MODULE,
++	.read =		ep0_read,
++	.write =	ep0_write,
++	.fasync =	ep0_fasync,
++	// .poll =	ep0_poll,
++	.ioctl =	dev_ioctl,
++	.release =	dev_release,
++};
++
++/*----------------------------------------------------------------------*/
++
++/* The in-kernel gadget driver handles most ep0 issues, in particular
++ * enumerating the single configuration (as provided from user space).
++ *
++ * Unrecognized ep0 requests may be handled in user space.
++ */
++
++#ifdef	HIGHSPEED
++static void make_qualifier (struct dev_data *dev)
++{
++	struct usb_qualifier_descriptor		qual;
++	struct usb_device_descriptor		*desc;
++
++	qual.bLength = sizeof qual;
++	qual.bDescriptorType = USB_DT_DEVICE_QUALIFIER;
++	qual.bcdUSB = __constant_cpu_to_le16 (0x0200);
++
++	desc = dev->dev;
++	qual.bDeviceClass = desc->bDeviceClass;
++	qual.bDeviceSubClass = desc->bDeviceSubClass;
++	qual.bDeviceProtocol = desc->bDeviceProtocol;
++
++	/* assumes ep0 uses the same value for both speeds ... */
++	qual.bMaxPacketSize0 = desc->bMaxPacketSize0;
++
++	qual.bNumConfigurations = 1;
++	qual.bRESERVED = 0;
++
++	memcpy (dev->rbuf, &qual, sizeof qual);
++}
++#endif
++
++static int
++config_buf (struct dev_data *dev, u8 type, unsigned index)
++{
++	int		len;
++#ifdef HIGHSPEED
++	int		hs;
++#endif
++
++	/* only one configuration */
++	if (index > 0)
++		return -EINVAL;
++
++#ifdef HIGHSPEED
++	hs = (dev->gadget->speed == USB_SPEED_HIGH);
++	if (type == USB_DT_OTHER_SPEED_CONFIG)
++		hs = !hs;
++	if (hs) {
++		dev->req->buf = dev->hs_config;
++		len = le16_to_cpup (&dev->hs_config->wTotalLength);
++	} else
++#endif
++	{
++		dev->req->buf = dev->config;
++		len = le16_to_cpup (&dev->config->wTotalLength);
++	}
++	((u8 *)dev->req->buf) [1] = type;
++	return len;
++}
++
++static int
++gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
++{
++	struct dev_data			*dev = get_gadget_data (gadget);
++	struct usb_request		*req = dev->req;
++	int				value = -EOPNOTSUPP;
++	struct usb_gadgetfs_event	*event;
++
++	spin_lock (&dev->lock);
++	dev->setup_abort = 0;
++	if (dev->state == STATE_UNCONNECTED) {
++		struct usb_ep	*ep;
++		struct ep_data	*data;
++
++		dev->state = STATE_CONNECTED;
++		dev->dev->bMaxPacketSize0 = gadget->ep0->maxpacket;
++
++#ifdef	HIGHSPEED
++		if (gadget->speed == USB_SPEED_HIGH && dev->hs_config == 0) {
++			ERROR (dev, "no high speed config??\n");
++			return -EINVAL;
++		}
++#endif	/* HIGHSPEED */
++
++		INFO (dev, "connected\n");
++		event = next_event (dev, GADGETFS_CONNECT);
++		event->u.speed = gadget->speed;
++		ep0_readable (dev);
++
++		list_for_each_entry (ep, &gadget->ep_list, ep_list) {
++			data = ep->driver_data;
++			/* ... down_trylock (&data->lock) ... */
++			if (data->state != STATE_EP_DEFER_ENABLE)
++				continue;
++#ifdef	HIGHSPEED
++			if (gadget->speed == USB_SPEED_HIGH)
++				value = usb_ep_enable (ep, &data->hs_desc);
++			else
++#endif	/* HIGHSPEED */
++				value = usb_ep_enable (ep, &data->desc);
++			if (value) {
++				ERROR (dev, "deferred %s enable --> %d\n",
++					data->name, value);
++				continue;
++			}
++			data->state = STATE_EP_ENABLED;
++			wake_up (&data->wait);
++			DBG (dev, "woke up %s waiters\n", data->name);
++		}
++
++	/* host may have given up waiting for response.  we can miss control
++	 * requests handled lower down (device/endpoint status and features);
++	 * then ep0_{read,write} will report the wrong status. controller
++	 * driver will have aborted pending i/o.
++	 */
++	} else if (dev->state == STATE_SETUP)
++		dev->setup_abort = 1;
++
++	req->buf = dev->rbuf;
++	req->dma = DMA_ADDR_INVALID;
++	req->context = 0;
++	value = -EOPNOTSUPP;
++	switch (ctrl->bRequest) {
++
++	case USB_REQ_GET_DESCRIPTOR:
++		if (ctrl->bRequestType != USB_DIR_IN)
++			goto unrecognized;
++		switch (ctrl->wValue >> 8) {
++
++		case USB_DT_DEVICE:
++			value = min (ctrl->wLength, (u16) sizeof *dev->dev);
++			req->buf = dev->dev;
++			break;
++#ifdef	HIGHSPEED
++		case USB_DT_DEVICE_QUALIFIER:
++			if (!dev->hs_config)
++				break;
++			value = min (ctrl->wLength, (u16)
++				sizeof (struct usb_qualifier_descriptor));
++			make_qualifier (dev);
++			break;
++		case USB_DT_OTHER_SPEED_CONFIG:
++			// FALLTHROUGH
++#endif
++		case USB_DT_CONFIG:
++			value = config_buf (dev,
++					ctrl->wValue >> 8,
++					ctrl->wValue & 0xff);
++			if (value >= 0)
++				value = min (ctrl->wLength, (u16) value);
++			break;
++		case USB_DT_STRING:
++			goto unrecognized;
++
++		default:		// all others are errors
++			break;
++		}
++		break;
++
++	/* currently one config, two speeds */
++	case USB_REQ_SET_CONFIGURATION:
++		if (ctrl->bRequestType != 0)
++			break;
++		if (0 == (u8) ctrl->wValue) {
++			value = 0;
++			dev->current_config = 0;
++			// user mode expected to disable endpoints
++		} else {
++			u8	config;
++#ifdef	HIGHSPEED
++			if (gadget->speed == USB_SPEED_HIGH)
++				config = dev->hs_config->bConfigurationValue;
++			else
++#endif
++				config = dev->config->bConfigurationValue;
++
++			if (config == (u8) ctrl->wValue) {
++				value = 0;
++				dev->current_config = config;
++			}
++		}
++
++		/* report SET_CONFIGURATION like any other control request,
++		 * except that usermode may not stall this.  the next
++		 * request mustn't be allowed start until this finishes:
++		 * endpoints and threads set up, etc.
++		 *
++		 * NOTE:  older PXA hardware (before PXA 255: without UDCCFR)
++		 * has bad/racey automagic that prevents synchronizing here.
++		 * even kernel mode drivers often miss them.
++		 */
++		if (value == 0) {
++			INFO (dev, "configuration #%d\n", dev->current_config);
++			if (dev->usermode_setup) {
++				dev->setup_can_stall = 0;
++				goto delegate;
++			}
++		}
++		break;
++
++#ifndef	CONFIG_USB_GADGETFS_PXA2XX
++	/* PXA automagically handles this request too */
++	case USB_REQ_GET_CONFIGURATION:
++		if (ctrl->bRequestType != 0x80)
++			break;
++		*(u8 *)req->buf = dev->current_config;
++		value = min (ctrl->wLength, (u16) 1);
++		break;
++#endif
++
++	default:
++unrecognized:
++		VDEBUG (dev, "%s req%02x.%02x v%04x i%04x l%d\n",
++			dev->usermode_setup ? "delegate" : "fail",
++			ctrl->bRequestType, ctrl->bRequest,
++			ctrl->wValue, ctrl->wIndex, ctrl->wLength);
++
++		/* if there's an ep0 reader, don't stall */
++		if (dev->usermode_setup) {
++			dev->setup_can_stall = 1;
++delegate:
++			dev->setup_in = (ctrl->bRequestType & USB_DIR_IN)
++						? 1 : 0;
++			dev->setup_out_ready = 0;
++			dev->setup_out_error = 0;
++			value = 0;
++
++			/* read DATA stage for OUT right away */
++			if (unlikely (!dev->setup_in && ctrl->wLength)) {
++				value = setup_req (gadget->ep0, dev->req,
++							ctrl->wLength);
++				if (value < 0)
++					break;
++				value = usb_ep_queue (gadget->ep0, dev->req,
++							GFP_ATOMIC);
++				if (value < 0) {
++					clean_req (gadget->ep0, dev->req);
++					break;
++				}
++
++				/* we can't currently stall these */
++				dev->setup_can_stall = 0;
++			}
++
++			/* state changes when reader collects event */
++			event = next_event (dev, GADGETFS_SETUP);
++			event->u.setup = *ctrl;
++			ep0_readable (dev);
++			spin_unlock (&dev->lock);
++			return 0;
++		}
++	}
++
++	/* proceed with data transfer and status phases? */
++	if (value >= 0 && dev->state != STATE_SETUP) {
++		req->length = value;
++		value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
++		if (value < 0) {
++			DBG (dev, "ep_queue --> %d\n", value);
++			req->status = 0;
++		}
++	}
++
++	/* device stalls when value < 0 */
++	spin_unlock (&dev->lock);
++	return value;
++}
++
++static void destroy_ep_files (struct dev_data *dev)
++{
++	struct list_head	*entry, *tmp;
++
++	DBG (dev, "%s %d\n", __FUNCTION__, dev->state);
++
++	/* dev->state must prevent interference */
++restart:
++	spin_lock_irq (&dev->lock);
++	list_for_each_safe (entry, tmp, &dev->epfiles) {
++		struct ep_data	*ep;
++
++		/* break link to FS */
++		ep = list_entry (entry, struct ep_data, epfiles);
++		list_del_init (&ep->epfiles);
++
++		/* break link to controller */
++		if (ep->state == STATE_EP_ENABLED)
++			(void) usb_ep_disable (ep->ep);
++		ep->state = STATE_EP_UNBOUND;
++		usb_ep_free_request (ep->ep, ep->req);
++		ep->ep = 0;
++		wake_up (&ep->wait);
++		put_ep (ep);
++
++		spin_unlock_irq (&dev->lock);
++
++		/* fds may still be open */
++		goto restart;
++	}
++	spin_unlock_irq (&dev->lock);
++}
++
++
++static int activate_ep_files (struct dev_data *dev)
++{
++	struct usb_ep	*ep;
++
++	gadget_for_each_ep (ep, dev->gadget) {
++		struct ep_data	*data;
++
++		data = kmalloc (sizeof *data, GFP_KERNEL);
++		if (!data)
++			goto enomem;
++		memset (data, 0, sizeof data);
++		data->state = STATE_EP_DISABLED;
++		init_MUTEX (&data->lock);
++		init_waitqueue_head (&data->wait);
++
++		strncpy (data->name, ep->name, sizeof (data->name) - 1);
++		atomic_set (&data->count, 1);
++		data->dev = dev;
++		get_dev (dev);
++
++		data->ep = ep;
++		ep->driver_data = data;
++
++		data->req = usb_ep_alloc_request (ep, GFP_KERNEL);
++		if (!data->req)
++			goto enomem;
++
++		list_add_tail (&data->epfiles, &dev->epfiles);
++	}
++	return 0;
++
++enomem:
++	DBG (dev, "%s enomem\n", __FUNCTION__);
++	destroy_ep_files (dev);
++	return -ENOMEM;
++}
++
++static void
++gadgetfs_unbind (struct usb_gadget *gadget)
++{
++	struct dev_data		*dev = get_gadget_data (gadget);
++
++	DBG (dev, "%s\n", __FUNCTION__);
++
++	spin_lock_irq (&dev->lock);
++	dev->state = STATE_DEV_UNBOUND;
++	spin_unlock_irq (&dev->lock);
++
++	destroy_ep_files (dev);
++	gadget->ep0->driver_data = 0;
++	set_gadget_data (gadget, 0);
++
++	/* we've already been disconnected ... no i/o is active */
++	if (dev->req)
++		usb_ep_free_request (gadget->ep0, dev->req);
++	DBG (dev, "%s done\n", __FUNCTION__);
++	put_dev (dev);
++}
++
++static struct dev_data		*the_device;
++
++static int
++gadgetfs_bind (struct usb_gadget *gadget)
++{
++	struct dev_data		*dev = the_device;
++
++	if (!dev)
++		return -ESRCH;
++	if (0 != strcmp (CHIP, gadget->name)) {
++		printk (KERN_ERR "%s expected " CHIP " controller not %s\n",
++			shortname, gadget->name);
++		return -ENODEV;
++	}
++
++	set_gadget_data (gadget, dev);
++	dev->gadget = gadget;
++	gadget->ep0->driver_data = dev;
++	dev->dev->bMaxPacketSize0 = gadget->ep0->maxpacket;
++
++	/* preallocate control response and buffer */
++	dev->req = usb_ep_alloc_request (gadget->ep0, GFP_KERNEL);
++	if (!dev->req)
++		goto enomem;
++	dev->req->context = 0;
++	dev->req->complete = epio_complete;
++
++	if (activate_ep_files (dev) < 0)
++		goto enomem;
++
++	INFO (dev, "bound to %s driver\n", gadget->name);
++	dev->state = STATE_UNCONNECTED;
++	get_dev (dev);
++	return 0;
++
++enomem:
++	gadgetfs_unbind (gadget);
++	return -ENOMEM;
++}
++
++static void
++gadgetfs_disconnect (struct usb_gadget *gadget)
++{
++	struct dev_data		*dev = get_gadget_data (gadget);
++
++	if (dev->state == STATE_UNCONNECTED) {
++		DBG (dev, "already unconnected\n");
++		return;
++	}
++	dev->state = STATE_UNCONNECTED;
++
++	INFO (dev, "disconnected\n");
++	spin_lock (&dev->lock);
++	next_event (dev, GADGETFS_DISCONNECT);
++	ep0_readable (dev);
++	spin_unlock (&dev->lock);
++}
++
++static void
++gadgetfs_suspend (struct usb_gadget *gadget)
++{
++	struct dev_data		*dev = get_gadget_data (gadget);
++
++	INFO (dev, "suspended from state %d\n", dev->state);
++	spin_lock (&dev->lock);
++	switch (dev->state) {
++	case STATE_SETUP:		// VERY odd... host died??
++	case STATE_CONNECTED:
++	case STATE_UNCONNECTED:
++		next_event (dev, GADGETFS_SUSPEND);
++		ep0_readable (dev);
++		/* FALLTHROUGH */
++	default:
++		break;
++	}
++	spin_unlock (&dev->lock);
++}
++
++static struct usb_gadget_driver gadgetfs_driver = {
++#ifdef	HIGHSPEED
++	.speed		= USB_SPEED_HIGH,
++#else
++	.speed		= USB_SPEED_FULL,
++#endif
++	.function	= (char *) driver_desc,
++	.bind		= gadgetfs_bind,
++	.unbind		= gadgetfs_unbind,
++	.setup		= gadgetfs_setup,
++	.disconnect	= gadgetfs_disconnect,
++	.suspend	= gadgetfs_suspend,
++
++	.driver 	= {
++		.name		= (char *) shortname,
++		// .shutdown = ...
++		// .suspend = ...
++		// .resume = ...
++	},
++};
++
++/*----------------------------------------------------------------------*/
++
++/* DEVICE INITIALIZATION
++ *
++ *     fd = open ("/dev/gadget/$CHIP", O_RDWR)
++ *     status = write (fd, descriptors, sizeof descriptors)
++ *
++ * That write establishes the device configuration, so the kernel can
++ * bind to the controller ... guaranteeing it can handle enumeration
++ * at all necessary speeds.  Descriptor order is:
++ *
++ * . message tag (u32, host order) ... for now, must be zero; it
++ *	would change to support features like multi-config devices
++ * . full/low speed config ... all wTotalLength bytes (with interface,
++ *	class, altsetting, endpoint, and other descriptors)
++ * . high speed config ... all descriptors, for high speed operation;
++ * 	this one's optional except for high-speed hardware
++ * . device descriptor
++ *
++ * Endpoints are not yet enabled. Drivers may want to immediately
++ * initialize them, using the /dev/gadget/ep* files that are available
++ * as soon as the kernel sees the configuration, or they can wait
++ * until device configuration and interface altsetting changes create
++ * the need to configure (or unconfigure) them.
++ *
++ * After initialization, the device stays active for as long as that
++ * $CHIP file is open.  Events may then be read from that descriptor,
++ * such configuration notifications.  More complex drivers will handle
++ * some control requests in user space.
++ */
++
++static int is_valid_config (struct usb_config_descriptor *config)
++{
++	return config->bDescriptorType == USB_DT_CONFIG
++		&& config->bLength == USB_DT_CONFIG_SIZE
++		&& config->bConfigurationValue != 0
++		&& (config->bmAttributes & USB_CONFIG_ATT_ONE) != 0
++		&& (config->bmAttributes & USB_CONFIG_ATT_WAKEUP) == 0;
++	/* FIXME check lengths: walk to end */
++}
++
++static ssize_t
++dev_config (struct file *fd, const char *buf, size_t len, loff_t *ptr)
++{
++	struct dev_data		*dev = fd->private_data;
++	ssize_t			value = len, length = len;
++	unsigned		total;
++	u32			tag;
++	char			*kbuf;
++
++	if (dev->state != STATE_OPENED)
++		return -EEXIST;
++
++	if (len < (USB_DT_CONFIG_SIZE + USB_DT_DEVICE_SIZE + 4))
++		return -EINVAL;
++
++	/* we might need to change message format someday */
++	if (copy_from_user (&tag, buf, 4))
++		return -EFAULT;
++	if (tag != 0)
++		return -EINVAL;
++	buf += 4;
++	length -= 4;
++
++	kbuf = kmalloc (length, SLAB_KERNEL);
++	if (!kbuf)
++		return -ENOMEM;
++	if (copy_from_user (kbuf, buf, length)) {
++		kfree (kbuf);
++		return -EFAULT;
++	}
++
++	spin_lock_irq (&dev->lock);
++	value = -EINVAL;
++	if (dev->buf)
++		goto fail;
++	dev->buf = kbuf;
++
++	/* full or low speed config */
++	dev->config = (void *) kbuf;
++	total = le16_to_cpup (&dev->config->wTotalLength);
++	if (!is_valid_config (dev->config) || total >= length)
++		goto fail;
++	kbuf += total;
++	length -= total;
++
++	/* optional high speed config */
++	if (kbuf [1] == USB_DT_CONFIG) {
++		dev->hs_config = (void *) kbuf;
++		total = le16_to_cpup (&dev->hs_config->wTotalLength);
++		if (!is_valid_config (dev->hs_config) || total >= length)
++			goto fail;
++		kbuf += total;
++		length -= total;
++	}
++
++	/* could support multiple configs, using another encoding! */
++
++	/* device descriptor (tweaked for paranoia) */
++	if (length != USB_DT_DEVICE_SIZE)
++		goto fail;
++	dev->dev = (void *)kbuf;
++	if (dev->dev->bLength != USB_DT_DEVICE_SIZE
++			|| dev->dev->bDescriptorType != USB_DT_DEVICE
++			|| dev->dev->bNumConfigurations != 1)
++		goto fail;
++	dev->dev->bNumConfigurations = 1;
++	dev->dev->bcdUSB = __constant_cpu_to_le16 (0x0200);
++
++	/* triggers gadgetfs_bind(); then we can enumerate. */
++	spin_unlock_irq (&dev->lock);
++	value = usb_gadget_register_driver (&gadgetfs_driver);
++	if (value != 0) {
++		kfree (dev->buf);
++		dev->buf = 0;
++	} else {
++		/* at this point "good" hardware has for the first time
++		 * let the USB the host see us.  alternatively, if users
++		 * unplug/replug that will clear all the error state.
++		 *
++		 * note:  everything running before here was guaranteed
++		 * to choke driver model style diagnostics.  from here
++		 * on, they can work ... except in cleanup paths that
++		 * kick in after the ep0 descriptor is closed.
++		 */
++		fd->f_op = &ep0_io_operations;
++		value = len;
++	}
++	return value;
++
++fail:
++	spin_unlock_irq (&dev->lock);
++	pr_debug ("%s: %s fail %d, %p\n", shortname, __FUNCTION__, value, dev);
++	kfree (dev->buf);
++	dev->buf = 0;
++	return value;
++}
++
++static int
++dev_open (struct inode *inode, struct file *fd)
++{
++	struct dev_data		*dev = inode->u.generic_ip;
++	int			value = -EBUSY;
++
++	if (dev->state == STATE_DEV_DISABLED) {
++		dev->ev_next = 0;
++		dev->state = STATE_OPENED;
++		fd->private_data = dev;
++		get_dev (dev);
++		value = 0;
++	}
++	return value;
++}
++
++static struct file_operations dev_init_operations = {
++	.owner =	THIS_MODULE,
++	.open =		dev_open,
++	.write =	dev_config,
++	.fasync =	ep0_fasync,
++	.ioctl =	dev_ioctl,
++	.release =	dev_release,
++};
++
++/*----------------------------------------------------------------------*/
++
++/*
++ * implementation for 2.4 uses character special files
++ *  ep0/device file	MKDEV (c_major, 0)
++ *  first data ep	MKDEV (c_major, 1)
++ *  second data ep	MKDEV (c_major, 2)
++ *  ...
++ *
++ *  FIXME can do it as a real filesystem on 2.4 too, without libfs
++ */
++static int c_major = 240;	/* 240 is local/experimental */
++MODULE_PARM (c_major, "i");
++MODULE_PARM_DESC (c_major, "major number for char special files");
++
++static int gadget_open (struct inode *ino, struct file *fp)
++{
++	int			num = minor (ino->i_rdev);
++	struct dev_data		*dev;
++	struct file_operations	*ops;
++
++	/* ep0 file, "/dev/gadget/$CHIP" */
++	if (num == 0) {
++		int		status;
++
++		if (the_device != 0)
++			return -EBUSY;
++		the_device = dev_new ();
++		if (the_device == 0)
++			return -ENOMEM;
++
++		dev = the_device;
++		ino->u.generic_ip = dev;
++		ops = &dev_init_operations;
++		fp->f_op = ops;
++
++		status = ops->open (ino, fp);
++		if (status < 0) {
++			put_dev (dev);
++			the_device = 0;
++		}
++		return status;
++
++	/* ep files, "/dev/gadget/$ENDPOINT" */
++	} else {
++		struct list_head	*entry;
++		struct ep_data		*data;
++
++		/* unavailable till device is initted */
++		dev = the_device;
++		if (dev == 0)
++			return -ENODEV;
++
++		/* order in controller's name listing matters! */
++		list_for_each (entry, &dev->epfiles) {
++			if (--num == 0)
++				goto found;
++		}
++		return -ENODEV;
++found:
++		data = list_entry (entry, struct ep_data, epfiles);
++		ino->u.generic_ip = data;
++		ops = &ep_config_operations;
++		fp->f_op = ops;
++
++		return ops->open (ino, fp);
++	}
++}
++
++static struct file_operations gadget_fops = {
++	.owner =	THIS_MODULE,
++	.open =		gadget_open,
++};
++
++/*----------------------------------------------------------------------*/
++
++static int __init init (void)
++{
++	int status;
++
++	status = register_chrdev (c_major, shortname, &gadget_fops);
++	if (status < 0) {
++		printk (KERN_WARNING "%s: can't get major %d\n",
++			shortname, c_major);
++		return status;
++	}
++
++	/* dynamic assignment */
++	if (c_major == 0)
++		c_major = status;
++	status = 0;
++
++	pr_info ("%s: using char major %d\n", shortname, c_major);
++
++	if (status == 0)
++		pr_info ("%s: %s, version " DRIVER_VERSION "\n",
++			shortname, driver_desc);
++	return status;
++}
++module_init (init);
++
++static void __exit cleanup (void)
++{
++	pr_debug ("unregister %s\n", shortname);
++	unregister_chrdev (c_major, shortname);
++}
++module_exit (cleanup);
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/n9604.c kernel/drivers/usb/gadget/n9604.c
+--- /tmp/kernel/drivers/usb/gadget/n9604.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/n9604.c	2005-04-22 17:53:19.461535120 +0200
+@@ -0,0 +1,1088 @@
++/*
++ * National 9603/4 USB Device Controller driver
++ * Copyright (C) 2004 Technical Solutions Inc. (support@techsol.ca)
++ * ported from : The Goku-S driver
++ * Copyright (C) 2003 MontaVista Software (source@mvista.com)
++ *
++ * This file is licensed under the terms of the GNU General Public
++ * License version 2.  This program is licensed "as is" without any
++ * warranty of any kind, whether express or implied.
++ */
++
++/*
++ * This device has ep0 and six semi-configurable bulk/interrupt endpoints.
++ *
++ *  - Endpoint numbering is fixed:
++ *  Endpoint 0: ep0
++ *  Endpoint 1: ep1in  (tx)
++ *  Endpoint 2: ep2out (rx)
++ *  Endpoint 3: ep3in  (tx)
++ *  Endpoint 4: ep4out (rx)
++ *  Endpoint 5: ep5in  (tx)
++ *  Endpoint 6: ep6out (rx)
++ */
++
++/*
++ * The ep->stage information refers to the state of a setup transaction
++ *
++ * state 0: no setup packet has been received
++ * state 1: setup packet has been received
++ * state 2: data has been sent/received
++ * state 3: ZLP has been received/sent
++ */
++
++#include <linux/config.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <linux/ioport.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/smp_lock.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include <asm/byteorder.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/unaligned.h>
++
++#include "n9604.h"
++#include "n9604regs.h"
++
++inline void Flush_and_enable(u8 control_reg) {
++	write_9604(RXC_FLUSH, control_reg);
++	while (read_9604(control_reg) & RXC_FLUSH);
++	write_9604(RXC_RX_EN, control_reg);
++}
++inline void Flush(u8 control_reg) {
++	write_9604(RXC_FLUSH, control_reg);
++	while (read_9604(control_reg) & RXC_FLUSH);
++}
++
++#define	DRIVER_DESC		"N9604 USB Device Controller"
++#define	DRIVER_VERSION		"29-Oct 2004"
++
++static const char driver_name [] = "n9604_udc";
++static const char driver_desc [] = DRIVER_DESC;
++
++MODULE_AUTHOR("support@techsol.ca");
++MODULE_DESCRIPTION(DRIVER_DESC);
++MODULE_LICENSE("GPL");
++
++static void nuke(struct n9604_ep *ep, int status);
++inline void send_zero_length(int endpoint, struct n9604_udc *dev);
++
++u8 * USBN9604_Offset; //device virtual address
++
++/* FIXME all the IRQ stuff is board-specific
++ */
++
++#define h7201_readl	readl
++#define h7201_writel	writel
++
++#define ETHER_IRQ_IP_OFFSET	0
++#define ETHER_IRQ_BIT_POS	0
++#define ETHER_IRQ_IM_OFFSET	0
++
++#define IRQ_GPIOC		-1
++
++#define USBD_ENABLE_IRQ {h7201_writel( h7201_readl(ETHER_IRQ_IP_OFFSET) | (1 << ETHER_IRQ_BIT_POS), ETHER_IRQ_IP_OFFSET);  h7201_writel( h7201_readl(ETHER_IRQ_IM_OFFSET) |  (1 << ETHER_IRQ_BIT_POS), ETHER_IRQ_IM_OFFSET);}
++#define USBD_DISABLE_IRQ h7201_writel( h7201_readl(ETHER_IRQ_IM_OFFSET) & ~(1 << ETHER_IRQ_BIT_POS), ETHER_IRQ_IM_OFFSET);
++
++
++/*-------------------------------------------------------------------------*/
++
++//enable an end point, of description desc
++static int n9604_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) {
++	struct n9604_udc *dev;
++	struct n9604_ep  *ep;
++	u16              max;
++
++	ep = container_of(_ep, struct n9604_ep, ep);
++
++	if (!_ep || !desc || ep->desc || desc->bDescriptorType != USB_DT_ENDPOINT)
++		return -EINVAL;
++
++	dev = ep->dev;
++	if (!ep->num) 
++		return -EINVAL;
++	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return -ESHUTDOWN;
++	if (ep->num && !(desc->bEndpointAddress & 0x0f))
++		return -EINVAL;
++	
++	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
++		case USB_ENDPOINT_XFER_BULK:
++		case USB_ENDPOINT_XFER_INT:
++			break;
++		default:
++			return -EINVAL;
++	}
++
++	write_9604((ep->numActual & EPC_EP_MASK) | EPC_EP_EN | (EPC_ISO * ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)), ep->control);
++	if (ep->is_in)
++		Flush(ep->command);
++	else
++		Flush_and_enable(ep->command);
++	
++	max = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
++	ep->ep.maxpacket = min_t(u16, max, MAX_FIFO_SIZE);
++	ep->desc = desc;
++	
++	return 0;
++}
++
++static int n9604_ep_disable(struct usb_ep *_ep)//ep > 0
++{
++	struct n9604_ep		*ep;
++	struct n9604_udc	*dev;
++	unsigned long		flags;
++
++	ep = container_of(_ep, struct n9604_ep, ep);
++
++	if (!_ep || !ep->desc)
++		return -ENODEV;
++	dev = ep->dev;
++
++	spin_lock_irqsave(&dev->lock, flags);
++	nuke(ep, -ESHUTDOWN);
++	write_9604(0, ep->command);
++	ep->desc = NULL;
++	spin_unlock_irqrestore(&dev->lock, flags);
++
++	return 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_request *
++n9604_alloc_request(struct usb_ep *_ep, int gfp_flags)
++{
++	struct n9604_request	*req;
++
++	if (!_ep)
++		return 0;
++	req = kmalloc(sizeof *req, gfp_flags);
++	if (!req)
++		return 0;
++
++	memset(req, 0, sizeof *req);
++	INIT_LIST_HEAD(&req->queue);
++	return &req->req;
++}
++
++static void
++n9604_free_request(struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct n9604_request	*req;
++
++	if (!_ep || !_req)
++		return;
++
++	req = container_of(_req, struct n9604_request, req);
++	WARN_ON(!list_empty(&req->queue));
++	kfree(req);
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void done(struct n9604_ep *ep, struct n9604_request *req, int status);
++
++static inline int
++write_packet(struct n9604_ep *ep, u8 *buf, struct n9604_request *req)
++{
++	unsigned        written_length, desired_length, available_length, maximum_length, flags, loop_length;
++
++	u8 fifo = ep->fifo;
++	u8 command = ep->command;
++	u8 status = ep->status;
++	if (!ep->num) {
++		fifo = TXD0;
++		command = TXC0;
++		status = TXS0;
++	}
++	
++	if (read_9604(command) & TXC_TX_EN)
++		return -EBUSY;
++	ep->packets++;
++	
++	desired_length = req->req.length - req->req.actual;
++	available_length = read_9604(status) & TXS_TCOUNT_MASK;//might be greater
++	written_length = 0;
++	if (ep->num)
++		maximum_length = MAX_FIFO_SIZE;
++	else
++		maximum_length = MAX_EP0_SIZE;
++
++	while ((loop_length = min(min(available_length, desired_length), maximum_length))) {
++		int i = loop_length;
++		while (i) { write_9604(*buf++,fifo); i--; }
++		written_length += loop_length;
++		desired_length -= loop_length;
++		maximum_length -= loop_length;
++		if (desired_length && maximum_length)//check if really need to read the chip again
++			available_length = (read_9604(status) & TXS_TCOUNT_MASK);
++	}
++	
++	req->req.actual += written_length;
++
++	flags = TXC_TX_EN;
++	if (ep->num)
++		flags |= TXC_LAST;
++	if (ep->toggle)
++		flags |= TXC_TOGGLE;
++	write_9604(flags, command);
++	ep->toggle = !(ep->toggle);
++	if (!written_length) req->req.zero = 0;//just wrote zero bytes, there is no more need for req.zero 
++	return written_length;
++}       
++
++// return:  0 = still running, 1 = completed, negative = errno
++static int write_fifo(struct n9604_ep *ep, struct n9604_request *req)
++{
++	struct n9604_udc *dev = ep->dev;
++	u8              *buf;
++	unsigned        count;
++	int             is_last;
++
++	buf = req->req.buf + req->req.actual;
++	prefetch(buf);
++	
++	dev = ep->dev;
++
++	count = write_packet(ep, buf, req);
++	if (count < 0)
++		return count;
++	
++	/* last packet often short (sometimes a zlp, especially on ep0) */
++	if ((req->req.length != req->req.actual) || req->req.zero)
++		is_last = 0;
++	else
++		is_last = 1;
++	
++	/* requests complete when all IN data is in the FIFO,
++	 * or sometimes later, if a zlp was needed.
++	 */
++	if (is_last) {
++		done(ep, req, 0);
++		return 1;
++	}
++	return 0;
++}
++
++static inline void pio_irq_enable(struct n9604_ep *ep);
++
++static int read_fifo(struct n9604_ep *ep, struct n9604_request *req)
++{
++	u32                     size;
++	u8                      *buf;
++	int			bufferspace_available, fifospace_left, num_bytes_read;
++	int 			fifo, status;
++	ep->packets++;
++	if (!ep->num) { 
++		fifo = RXD0;
++		status = RXS0;
++	} else {
++		fifo = ep->fifo;
++		status = ep->status;
++	}
++	num_bytes_read = 0;
++	buf = req->req.buf + req->req.actual;
++	bufferspace_available = req->req.length - req->req.actual;
++	size = read_9604(status) & (RXS_RCOUNTMASK | RXS_RX_ERR);//number of bytes ready to be read (15 if greater than 15)
++	if (ep->num && (size & RXS_RX_ERR)) {
++		ERROR(ep->dev, "DATA ERROR!!!! on ep%d\nFlushing Fifo", ep->num);
++		Flush_and_enable(ep->command);
++		goto leave;
++	}
++	size = size & ~RXS_RX_ERR;//clear the bit
++	if (ep->num)	fifospace_left = MAX_FIFO_SIZE;
++	else		fifospace_left = MAX_EP0_SIZE;
++loop:
++	/* read all bytes from this packet */
++	while (size-- != 0) {
++		u8 byte = read_9604(fifo);
++		if (unlikely(bufferspace_available == 0)) {
++			/* this happens when the driver's buffer
++			 * is smaller than what the host sent.
++			 * discard the extra data in this packet.
++			 */
++			done(ep, req, -EOVERFLOW);
++			return 1;
++		} else {
++			*buf++ = byte;
++			bufferspace_available--;
++			fifospace_left--;
++			num_bytes_read++;
++		}
++	}
++	if ((size = (read_9604(status) & RXS_RCOUNTMASK))) {
++		goto loop;//since there is more data
++	}
++	/* completion */
++	req->req.actual = req->req.actual + num_bytes_read;
++	if (fifospace_left || req->req.actual == req->req.length) {
++		done(ep, req, 0);
++		return 1;
++	}
++leave:
++	pio_irq_enable(ep);//turn the interrupt back on
++	return 0;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static inline void
++pio_irq_enable(struct n9604_ep *ep)
++{
++	if (ep->is_in) 
++		write_9604(read_9604(TXMSK) | 1 << ep->fifoNum | 0x10 << ep->fifoNum, TXMSK);
++	else {
++		u8 command = ep->command;
++		if (!ep->num) command = RXC0;
++		write_9604(read_9604(RXMSK) | 1 << ep->fifoNum | 0x10 << ep->fifoNum, RXMSK);
++		write_9604(RXC_RX_EN | RXC_RFWL0 | RXC_RFWL1, command);
++	}
++}
++
++static inline void
++pio_irq_disable(struct n9604_ep *ep)//epnum != 0
++{
++	if (ep->is_in)
++		write_9604(read_9604(TXMSK) & ~(1 << ep->fifoNum) & ~(0x10 << ep->fifoNum), TXMSK);
++	else
++		write_9604(read_9604(RXMSK) & ~(1 << ep->fifoNum) & ~(0x10 << ep->fifoNum), RXMSK);
++}
++
++static int request_voodoo = 0;//number of bytes the host requested
++
++static inline void
++pio_advance(struct n9604_ep *ep)
++{
++	struct n9604_request     *req;
++
++	if (list_empty (&ep->queue)) {
++		if (!ep->num) {
++			if (ep->is_in && (ep->stage == 2)) {
++				ep->is_in = 0;//switch modes
++				Flush_and_enable(RXC0);//needed to receive a ZLP after tx
++				ep->stage++;//and bump the stage number 
++			} else if (ep->stage == 3) {
++				ep->stage = 0;
++			}
++		}
++		return;
++	}
++	req = list_entry(ep->queue.next, struct n9604_request, queue);
++	(ep->is_in ? write_fifo : read_fifo)(ep, req);
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void * n9604_alloc_buffer(struct usb_ep *_ep, unsigned bytes, dma_addr_t *dma, int  gfp_flags)
++{
++	return kmalloc(bytes, gfp_flags);
++}
++
++static void n9604_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma, unsigned bytes)
++{
++	kfree (buf);
++}
++
++
++
++/*-------------------------------------------------------------------------*/
++
++static void
++done(struct n9604_ep *ep, struct n9604_request *req, int status)
++{
++	struct n9604_udc         *dev;
++
++	list_del_init(&req->queue);
++	ep->queue_active--;
++	
++	if (req->req.status == -EINPROGRESS)
++		req->req.status = status;
++	else
++		status = req->req.status;
++	
++	dev = ep->dev;
++	
++	/* don't modify queue heads during completion callback */
++	if (ep->num)
++		pio_irq_disable(ep);
++	else if (!ep->nuking) {
++		ep->stage++;
++		ep->toggle = 1;//other endpoints stay in their flipping mode between transactions
++		if (ep->stage == 2) {//we are in stage 2 now
++			if (!ep->is_in) {
++				ep->is_in = 1;//switch modes
++				request_voodoo = 1;//prevents n9604_queue from calling us again before doing anything
++				send_zero_length(0, dev);
++			} else {//we have to receive a ZLP
++				//this will happen when the tx is complete, the pio_advance fcn will activate it for us
++			}
++		}
++	}
++		
++	req->req.complete(&ep->ep, &req->req);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static int
++n9604_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
++{
++	struct n9604_request	*req;
++	struct n9604_ep		*ep;
++	struct n9604_udc	*dev;
++	unsigned long		flags;
++	int			status;
++
++	req = container_of(_req, struct n9604_request, req);
++	if (unlikely(!_req || !_req->complete
++			|| !_req->buf || !list_empty(&req->queue)))
++		return -EINVAL;
++	ep = container_of(_ep, struct n9604_ep, ep);
++	if (unlikely(!_ep || (!ep->desc && ep->num != 0)))
++		return -EINVAL;
++	dev = ep->dev;
++	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
++		return -ESHUTDOWN;
++	}
++	if (ep->nuking)
++		return -ESHUTDOWN;
++
++	spin_lock_irqsave(&dev->lock, flags);
++
++	ep->queue_reqs++;
++	ep->queue_active++;
++
++	_req->status = -EINPROGRESS;
++	_req->actual = 0;
++
++	/* for ep0 IN without premature status, zlp is required and
++	 * writing EOP starts the status stage (OUT).
++	 */
++	if (ep->num == 0) {
++		if ((request_voodoo > _req->length) && !(_req->length % MAX_EP0_SIZE) && (_req->length != 0)) {
++			_req->zero = 1;
++		}
++		if (!request_voodoo && !ep->is_in) {//this is a zero length request
++			spin_unlock_irqrestore(&dev->lock, flags);//David
++			done(ep, req, 0);//this doesn't check if the list is empty (probably not an issue)
++			return 0;	//shouldn't this be handled by the rx irq fcn, and passed to pio_advance
++		}//that may conflict with the voodoo stuff, maybe best to leave it
++	}
++	
++	/* kickstart this i/o queue? */
++	status = 0;
++	if (list_empty(&ep->queue) && ep->is_in) {
++		status = write_fifo(ep, req);
++		if (status == -EBUSY)
++			;//we should queue up the request then
++		else {
++			if (status != 0) {
++				if (status > 0)
++					status = 0;
++				req = 0;
++			}
++		}
++	} /* else pio or dma irq handler advances the queue. */
++
++	if (req != 0) {
++		list_add_tail(&req->queue, &ep->queue);
++		pio_irq_enable(ep);
++	}
++
++	spin_unlock_irqrestore(&dev->lock, flags);
++	return status;
++}
++
++/* dequeue ALL requests */
++static void nuke(struct n9604_ep *ep, int status)
++{
++	struct n9604_request	*req;
++	
++	if (list_empty(&ep->queue))
++		return;
++	ep->nuking = 1;
++	while (!list_empty(&ep->queue)) {
++		req = list_entry(ep->queue.next, struct n9604_request, queue);
++		done(ep, req, status);
++	}
++	ep->nuking = 0;
++}
++
++/* dequeue JUST ONE request */
++static int n9604_dequeue(struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct n9604_request	*req;
++	struct n9604_ep		*ep;
++	struct n9604_udc	*dev;
++	unsigned long		flags;
++
++	ep = container_of(_ep, struct n9604_ep, ep);
++	if (!_ep || !_req || (!ep->desc && ep->num != 0))
++		return -EINVAL;
++	dev = ep->dev;
++
++	if (!dev->driver)
++		return -ESHUTDOWN;
++
++	spin_lock_irqsave(&dev->lock, flags);
++
++	/* make sure it's actually queued on this endpoint */
++	list_for_each_entry (req, &ep->queue, queue) {
++		if (&req->req == _req)
++			break;
++	}
++	if (&req->req != _req) {
++		spin_unlock_irqrestore (&dev->lock, flags);
++		return -EINVAL;
++	}
++
++	spin_unlock_irqrestore(&dev->lock, flags);
++
++	return req ? 0 : -EOPNOTSUPP;
++}
++
++static int n9604_clear_halt(struct usb_ep *_ep) {
++	struct n9604_ep *ep;
++	ep = container_of (_ep, struct n9604_ep, ep);
++
++	write_9604(read_9604(ep->control) & ~EPC_STALL, ep->control);
++	pio_advance(ep);
++	return 0;
++}
++
++static int n9604_set_halt(struct usb_ep *_ep, int value) {
++	struct n9604_ep *ep;
++	unsigned long   flags;
++	int             retval = 0;
++
++	if (!_ep) {
++		retval = -ENODEV; goto exit;
++	}
++	ep = container_of (_ep, struct n9604_ep, ep);
++
++	if (ep->num == 0) {//is this valid?
++		if (!value) {
++			 retval = -EINVAL; goto exit; }
++
++	/* don't change EPxSTATUS_EP_INVALID to READY */
++	} else if (!ep->desc) {
++		retval = -EINVAL; goto exit;
++	}
++
++	spin_lock_irqsave(&ep->dev->lock, flags);
++	if (!list_empty(&ep->queue))
++		retval = -EAGAIN;
++	else if (!value)
++		n9604_clear_halt(_ep);
++	else {
++		write_9604(read_9604(ep->control) | EPC_STALL, ep->control);
++	}
++	spin_unlock_irqrestore(&ep->dev->lock, flags);
++exit:
++	return retval;
++}
++
++static int n9604_fifo_status(struct usb_ep *_ep) {//not implemented
++	return -1;
++}
++
++static void n9604_fifo_flush(struct usb_ep *_ep) {//not implemented
++	struct n9604_ep *ep;
++	ep = container_of (_ep, struct n9604_ep, ep);
++}
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_ep_ops n9604_ep_ops = {
++	.enable         = n9604_ep_enable,
++	.disable        = n9604_ep_disable,
++
++	.alloc_request  = n9604_alloc_request,//io request objects called struct usb_request
++	.free_request   = n9604_free_request,
++
++	.alloc_buffer   = n9604_alloc_buffer,
++	.free_buffer    = n9604_free_buffer,
++
++	.queue          = n9604_queue,//submit a struct usb_request object to an endpoint
++	.dequeue        = n9604_dequeue,
++
++	.set_halt       = n9604_set_halt,//halts an endpoint
++	.fifo_status    = n9604_fifo_status,//bytes in FIFO + data ready to go in FIFO
++	.fifo_flush     = n9604_fifo_flush,//flush all the data, endpoint is probably been reconfigured
++};
++
++/*-------------------------------------------------------------------------*/
++
++static int n9604_get_frame(struct usb_gadget *_gadget)
++{
++	return -EOPNOTSUPP;
++}
++
++static const struct usb_gadget_ops n9604_ops = {
++	.get_frame	= n9604_get_frame,
++};
++
++/*-------------------------------------------------------------------------*/
++
++static void udc_reinit (struct n9604_udc *dev)
++{
++	static char *names [] = { "ep0", "ep1in", "ep2out", "ep3in", "ep4out", "ep5in", "ep6out" };
++	unsigned i;
++
++	INIT_LIST_HEAD (&dev->gadget.ep_list);
++	dev->gadget.ep0 = &dev->ep [0].ep;
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++	dev->irqs = 0;
++	dev->configured = 0;
++
++	//for (i = 0; i < 7; i++) {
++	for (i = 0; i < ARRAY_SIZE(names); i++) {
++		struct n9604_ep	*ep = &dev->ep[i];
++		ep->num = i;
++		ep->numActual = i; 
++		ep->ep.name = names[i];
++		ep->irqs = 0;
++		if (i) {
++			ep->fifo = (i * 4) + RXD0;	//each FIFO address is 4 bytes away.  TXD0 is the first
++			ep->control = ep->fifo - 1;
++			ep->status = ep->fifo + 1;
++			ep->command = ep->fifo + 2;
++			Flush(ep->command);//flush any data in the fifo//we don't care about the previous state
++			read_9604(ep->status);
++			ep->ep.maxpacket = MAX_FIFO_SIZE;
++		} else {//were are endpoint 0
++			ep->fifo = ep->control = ep->status = ep->command = 0xff;//this should force an error
++										//we need to do this since we don't know if 
++										//this is tx or rx
++			read_9604(TXS0);
++			Flush(TXC0);
++			Flush(RXC0);//we could potentially (probably) overwriting a pending setup packet
++			if (ep->stage)//if we get a setup packet before we have a chance to finish the reset we have a problem
++				read_9604(RXS0);//fix this by sending stalls or something
++			ep->stage = 0;
++			ep->ep.maxpacket = MAX_EP0_SIZE;
++		}
++		ep->is_in = i % 2;
++		ep->fifoNum = (i + ep->is_in) / 2;//ignored for endpoint 0
++		ep->ep.ops = &n9604_ep_ops;
++		list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
++		ep->dev = dev;
++		INIT_LIST_HEAD (&ep->queue);
++		ep->nuking=0;
++		ep->queue_reqs = 0;
++		ep->queue_active = 0;
++		ep->packets = 0;
++		ep->desc = 0;
++		ep->irqs = 0;
++	}
++
++	list_del_init (&dev->ep[0].ep.ep_list);
++
++	write_9604(~WKUP_PNDUSB & ~WKUP_PNDUC & read_9604(WKUP), WKUP);//clear the bits, we've done a reset
++	write_9604(FAR_AD_EN, FAR);//enable the chip to answer requests//address 0
++	dev->address = 0;
++	write_9604(0, EPC0);//clear the control register
++	write_9604(NFSR_NodeOperational, NFSR);//we're going for gold
++}
++
++static void udc_reset(struct n9604_udc *dev)
++{
++	//USBD_DISABLE_IRQ; This disables all interrupts sharing that line
++	write_9604(MCNTRL_SRST,MCNTRL);//software reset -- this also prevents pullup
++	write_9604(0x00, MAMSK); //disable interrupts
++}
++
++
++
++static void udc_enable(struct n9604_udc *dev)
++{
++	udc_reset(dev); //this is to prevent a pullup resistor
++	udc_reinit (dev);
++
++	dev->gadget.speed = USB_SPEED_FULL;
++
++	// enable ep0 interrupts
++	dev->ep[0].is_in = 0;
++	
++	write_9604(MAMSK_WARN | MAMSK_ALT | MAMSK_TX_EV | MAMSK_RX_EV | MAMSK_INTR, MAMSK);//for now we turn it all on, except frames & ULD & NAK
++	write_9604(ALTMSK_RESET, ALTMSK);//just turn on reset
++	write_9604(0x11, TXMSK);
++	write_9604(0x11, RXMSK);
++	write_9604(0x0, NAKMSK);
++	write_9604(0x0, FWMSK);
++	write_9604(MCNTRL_NAT | MCNTRL_INTOC_ActHigh, MCNTRL);//this activates the pull-up and turns on interrupts
++	USBD_ENABLE_IRQ;
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* keeping it simple:
++ * - one bus driver, initted first;
++ * - one function driver, initted second
++ */
++
++static struct n9604_udc        *the_controller;
++
++/* when a driver is successfully registered, it will receive
++ * control requests including set_configuration(), which enables
++ * non-control requests.  then usb traffic follows until a
++ * disconnect is reported.  then a host may connect again, or
++ * the driver might get unbound.
++ */
++int usb_gadget_register_driver(struct usb_gadget_driver *driver)
++{
++	struct n9604_udc	*dev = the_controller;
++	int			retval;
++
++	if (!driver
++			|| driver->speed != USB_SPEED_FULL
++			|| !driver->bind
++			|| !driver->unbind
++			|| !driver->disconnect
++			|| !driver->setup)
++		return -EINVAL;
++	if (!dev)
++		return -ENODEV;
++	if (dev->driver)
++		return -EBUSY;
++
++	/* hook up the driver */
++	dev->driver = driver;
++	retval = driver->bind(&dev->gadget);
++	if (retval) {
++		dev->driver = 0;
++		return retval;
++	}
++
++	/* then enable host detection and ep0; and we're ready
++	 * for set_configuration as well as eventual disconnect.
++	 */
++	udc_enable(dev);
++
++	return 0;
++}
++EXPORT_SYMBOL(usb_gadget_register_driver);
++
++int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
++{
++	struct n9604_udc	*dev = the_controller;
++	unsigned long	flags;
++	int i;
++
++	if (!dev)
++		return -ENODEV;
++	if (!driver || driver != dev->driver)
++		return -EINVAL;
++
++	spin_lock_irqsave(&dev->lock, flags);
++	dev->driver = 0;
++	
++	udc_reset(dev);//reset & diable irqs
++	for (i = 0; i < ARRAY_SIZE(dev->ep); i++)
++		nuke(&dev->ep [i], -ESHUTDOWN);
++	spin_unlock_irqrestore(&dev->lock, flags);
++
++	if (dev->gadget.speed != USB_SPEED_UNKNOWN)
++		driver->disconnect(&dev->gadget);
++	driver->unbind(&dev->gadget);
++
++	return 0;
++}
++EXPORT_SYMBOL(usb_gadget_unregister_driver);
++
++
++/*-------------------------------------------------------------------------*/
++
++inline u8 tx_ev_irq(struct n9604_udc *dev) {
++	u8      mask;
++
++	mask = read_9604(TXEV) & read_9604(TXMSK);
++
++	if (mask & TXEV_FIFO0) {
++		write_9604(0, EPC0);//make sure we are not stalled, & not using the default address
++		read_9604(TXS0);//should really check for error conditions
++		dev->ep[0].irqs++;
++		pio_advance(&dev->ep[0]);
++	}
++	if (mask & TXEV_FIFO1) {
++		read_9604(TXS1);
++		dev->ep[1].irqs++;
++		pio_advance(&dev->ep[1]);
++	}
++	if (mask & TXEV_FIFO2) {
++		read_9604(TXS2);
++		dev->ep[3].irqs++;
++		pio_advance(&dev->ep[3]);
++	}
++	if (mask & TXEV_FIFO3) {
++		read_9604(TXS3);
++		dev->ep[5].irqs++;
++		pio_advance(&dev->ep[5]);
++	}
++	return mask;
++}
++
++static void my_req_complete(struct usb_ep *_ep, struct usb_request *req) {//this was for the setup packet, but I guess I could use it for anything
++	n9604_free_buffer(_ep, req->buf, req->dma, req->length);
++	n9604_free_request(_ep, req);
++}
++
++inline void send_dummy_packet(int endpoint, struct n9604_udc *dev, int length) {
++	struct usb_request *my_req;
++	my_req = n9604_alloc_request(&dev->ep[endpoint].ep, GFP_ATOMIC);
++	my_req->length = length;
++	my_req->buf = n9604_alloc_buffer(&dev->ep[endpoint].ep, length, &my_req->dma, GFP_ATOMIC);
++	my_req->complete = my_req_complete;
++	n9604_queue(&dev->ep[endpoint].ep, my_req, GFP_ATOMIC);
++}
++
++inline void send_zero_length(int endpoint, struct n9604_udc *dev) {
++	send_dummy_packet(endpoint, dev, 0);
++}
++
++inline void rx_ev_irq(struct n9604_udc *dev) {
++	u8	mask;
++	struct n9604_ep *ep;
++
++	mask = read_9604(RXEV) & read_9604(RXMSK);
++
++	if (mask & RXEV_FIFO0) {
++		static int read_mode = 0;
++		u8 rxs_mask = read_9604(RXS0);
++		ep = &dev->ep[0];
++		ep->irqs++;
++		if (rxs_mask & RXS_SETUP) {
++			struct usb_ctrlrequest ctrl;
++			ep->packets++;
++			write_9604(0x40, ALTMSK);//someone is talking to us.  Make sure we can be reset if we lose this communication
++			ep->stage = 1;
++			rxs_mask = read_9604(RXS0);//2nd read (1st one is for zero length packet)
++			ctrl.bRequestType = read_9604(RXD0);
++			ctrl.bRequest = read_9604(RXD0);
++			ctrl.wValue = read_9604(RXD0) + (read_9604(RXD0) << 8);
++			ctrl.wIndex = read_9604(RXD0) + (read_9604(RXD0) << 8);
++			ctrl.wLength = read_9604(RXD0) + (read_9604(RXD0) << 8);
++			ep->toggle = 1;
++			request_voodoo = ctrl.wLength;
++			if (ctrl.bRequestType & 0x80) {//This is an IN transaction
++				ep->is_in = 1;//David: is this correct for both cases//check with n9604_queue
++				read_mode = 0;
++				if (ctrl.wLength) {//should be followed by ZLP out packet
++				} else {//host expects ZLP out packet
++					ep->stage = 2;
++				}
++			} else {//This is an out transaction
++				if (ctrl.wLength) {
++					ep->is_in = 0;
++					read_mode = 1;
++				} else {//host expects ZLP in packet
++					read_mode = 0;
++					ep->stage = 2;
++					ep->is_in = 1;
++				}
++			}
++			switch (ctrl.bRequest) {
++				case USB_REQ_SET_ADDRESS:
++					write_9604(EPC_DEF, EPC0);//we still want to respond to the default address
++					write_9604(((dev->address = (ctrl.wValue & FAR_AD_MASK))) | FAR_AD_EN, FAR);
++					send_zero_length(0, dev);
++					dev->configured = 1;//we can send longer packets now :)
++					read_9604(ALTEV);
++					write_9604(ALTMSK_RESET, ALTMSK);//we also listen to reset requests too
++					break;
++				case USB_REQ_CLEAR_FEATURE:
++					if (ctrl.wValue == 0 && ctrl.bRequestType == 2) {//endpoint halt
++						int i;
++						for (i = 0; i < ARRAY_SIZE(dev->ep); i++) 
++							if ((ctrl.wIndex & 0xF) == dev->ep[i].numActual)
++								n9604_clear_halt(&dev->ep[i].ep);
++						send_zero_length(0, dev);
++						break;
++					}
++				case USB_REQ_SET_DESCRIPTOR:
++				case USB_REQ_SYNCH_FRAME:
++				case USB_REQ_GET_STATUS:
++				case USB_REQ_SET_FEATURE:
++				case USB_REQ_SET_CONFIGURATION:
++				case USB_REQ_GET_DESCRIPTOR:
++				case USB_REQ_GET_CONFIGURATION:
++				case USB_REQ_SET_INTERFACE:
++				case USB_REQ_GET_INTERFACE:
++				default:
++					if (dev->driver->setup(&dev->gadget, &ctrl) < 0)//there was an error
++						if (((ctrl.bRequestType & 0x80) && ctrl.wLength) || (!(ctrl.bRequestType & 0x80) && !ctrl.wLength))
++							send_zero_length(0, dev);
++			}//crtl.bRequest
++		}//setup
++		else if (read_mode)
++			pio_advance(ep);
++		else {
++			ep->stage = 0;
++			ep->packets++;
++		}
++	}//fifo 0
++	if (mask & RXEV_FIFO1) {
++		ep = &dev->ep[2];
++		pio_advance(ep);
++		ep->irqs++;
++	}
++	if (mask & RXEV_FIFO2) {
++		ep = &dev->ep[4];
++		pio_advance(ep);
++		ep->irqs++;
++	}
++	if (mask & RXEV_FIFO3) {
++		ep = &dev->ep[6];
++		pio_advance(ep);
++		ep->irqs++;
++	}
++}
++
++inline void alt_ev_irq(struct n9604_udc *dev) {
++	u8      mask;
++
++	mask = read_9604(ALTEV) & read_9604(ALTMSK);
++
++	if (mask & ALTEV_EOP);
++	if (mask & ALTEV_SD3);
++	if (mask & ALTEV_SD5);
++	if (mask & ALTEV_RESET) {
++		int i;
++		udelay(1200);//no idea why this is needed, but it makes things work
++		write_9604(0x0, FAR);//lets not respond to any packets until we are ready
++		write_9604(NFSR_NodeReset, NFSR);
++		dev->driver->disconnect(&dev->gadget);
++		for (i = 0; i < ARRAY_SIZE(dev->ep); i++)
++			nuke(&dev->ep [i], -ESHUTDOWN);//this should be handled above by disconnect
++		write_9604(0x00, ALTMSK);//make sure reset is turned off, or we will constantly be interrupted
++		write_9604(0x11, TXMSK);
++		write_9604(0x11, RXMSK);
++		udc_reinit(dev);
++		dev->gadget.speed = USB_SPEED_FULL;
++		dev->ep[0].is_in = 0;
++	}
++	if (mask & ALTEV_RESUME); //write_9604(NFSR_NodeOperational, NFSR);
++	if (mask & ALTEV_WKUP);//we don't really sleep
++	if (mask & ALTEV_DMA);
++}
++
++static void n9604_irq(int irq, void *_dev, struct pt_regs *r) {
++	struct n9604_udc         *dev = _dev;
++	u8			mask;
++
++	mask = read_9604(MAEV) & read_9604(MAMSK);
++	if (!mask)
++		return;
++
++	if (mask & MAEV_ALT) {
++		alt_ev_irq(dev);
++		mask = read_9604(MAEV) & read_9604(MAMSK);//force a re-read of the current pending interrupts
++	}
++	if (mask & MAEV_TX_EV)
++		tx_ev_irq(dev);
++	if (mask & MAEV_RX_EV)
++		rx_ev_irq(dev);
++	dev->irqs++;
++	return;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static int __init init (void)
++{
++	struct n9604_udc	*dev;
++	int ret;
++	u8 * addr;
++
++	if (the_controller) 
++		return -EBUSY;
++
++	addr = ioremap(USBN9604_PHYS, 0x2);//ioremap will bump this to 1 page size
++	if (!addr) {
++		ERROR(dev, KERN_ERR "Unable to remap address\n");
++		return -EINVAL;
++	}
++
++	USBN9604_Offset = addr;
++	
++	if ((read_9604(RID) & 0xF) != 0x2) { //0x2 is the identifier for 9603/4
++		iounmap(addr);
++		return -ENODEV;
++	}
++	
++	/* alloc, and start init */
++	dev = kmalloc(sizeof *dev, SLAB_KERNEL);
++	if (dev == NULL){
++		WARN(dev, "No memory");
++		iounmap(addr);
++		return -ENOMEM;
++	}
++	memset(dev, 0, sizeof *dev);
++	spin_lock_init(&dev->lock);
++	dev->gadget.ops = &n9604_ops;
++	dev->gadget.is_dualspeed = 0;
++
++	/* the "gadget" abstracts/virtualizes the controller */
++	dev->gadget.dev.bus_id = "gadget";
++	dev->gadget.name = driver_name;
++
++	/* initialize the hardware */
++
++	udc_reset(dev);
++
++	write_9604(CCONF_CODIS | 11, CCONF);
++
++	udc_reinit(dev);//this is necessary as it sets up the epx functions
++	
++	the_controller = dev;
++
++	if ((ret=request_irq(IRQ_GPIOC, n9604_irq, SA_SHIRQ, driver_name,dev))) {
++		WARN(dev, "Can't get IRQ\n");
++		iounmap(addr);
++		return ret;
++	}
++
++	return 0;
++}
++module_init (init);
++
++static void __exit cleanup (void)
++{
++	struct n9604_udc	*dev = the_controller;
++
++	//first kill the interrupts
++	udc_reset(dev);
++	free_irq(IRQ_GPIOC, dev);
++	
++	/* start with the driver above us */
++	if (dev->driver) {
++		/* should have been done already by driver model core */
++		WARN(dev, "Warning: Driver '%s' is still registered\n",
++				dev->driver->driver.name);
++		usb_gadget_unregister_driver(dev->driver);
++	}
++	kfree(dev);
++	iounmap(USBN9604_Offset);
++	the_controller = 0;
++
++}
++module_exit (cleanup);
++
++MODULE_PARM_DESC (delayTime, "Delays after reads and writes to the USB chip");
++MODULE_PARM (delayTime, "i");
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/n9604.h kernel/drivers/usb/gadget/n9604.h
+--- /tmp/kernel/drivers/usb/gadget/n9604.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/n9604.h	2005-04-22 17:53:19.463534794 +0200
+@@ -0,0 +1,112 @@
++/*
++ * National 9604 USB device controller driver
++ *
++ * Copyright 2003 Technical Solutions Inc.
++ *
++ * ported from:
++ * 
++ * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
++ *
++ * Copyright (C) 2000-2002 Lineo
++ *      by Stuart Lynne, Tom Rushworth, and Bruce Balden
++ * Copyright (C) 2002 Toshiba Corporation
++ * Copyright (C) 2003 MontaVista Software (source@mvista.com)
++ *
++ * This file is licensed under the terms of the GNU General Public
++ * License version 2.  This program is licensed "as is" without any
++ * warranty of any kind, whether express or implied.
++ */
++
++#define MAX_FIFO_SIZE   64
++#define MAX_EP0_SIZE    8
++
++struct n9604_ep {
++	struct usb_ep                           ep;
++	struct n9604_udc			*dev;
++	unsigned long				irqs;
++	int					acct_req_lengths[4];
++	int					acct_req_dir[4];//direction
++	unsigned long				queue_reqs;//how many times has n9604_queue been called
++	unsigned long				queue_active;//how many current requests
++	unsigned long				packets;//counter of raw packets
++	unsigned				num:4,
++						numActual:4,
++						fifoNum:2,
++						is_in:1,
++						stage:2,//for ep0, 0 = unused, 1 = got setup, 2 = done transfer/ready to send/receive ZLP
++						toggle:1,
++						nuking:1;//are we killing on off this endpoint//only used for ep0 to help with stages
++	/* analogous to a host-side qh */
++	struct list_head			queue;
++	const struct usb_endpoint_descriptor	*desc;
++
++	u8					control;
++	u8					fifo;
++	u8					status;
++	u8					command;
++};
++
++struct n9604_request {
++	struct usb_request		req;
++	struct list_head		queue;
++	int				complete;//this is added for tx requests
++						//if set the entire request has been written to the fifo, just waiting for confirmation
++						//from the interrupt that it has been sent
++
++	unsigned			mapped:1;
++};
++
++struct n9604_udc {
++	struct usb_gadget		gadget;
++	spinlock_t			lock;
++	struct n9604_ep			ep[7];
++	struct usb_gadget_driver	*driver;
++	int				configured;
++
++	u8				address;
++
++	/* statistics... */
++	unsigned long			irqs;
++};
++
++
++/*-------------------------------------------------------------------------*/
++
++#define xprintk(dev,level,fmt,args...) \
++	printk(level "%s %s: " fmt , driver_name , \
++			"S2410 gadget" , ## args)
++
++#define ERROR(dev,fmt,args...) \
++	xprintk(dev , KERN_ERR , fmt , ## args)
++#define WARN(dev,fmt,args...) \
++	xprintk(dev , KERN_WARNING , fmt , ## args)
++#define INFO(dev,fmt,args...) \
++	xprintk(dev , KERN_INFO , fmt , ## args)
++
++/*-------------------------------------------------------------------------*/
++
++/* 2.5 stuff that's sometimes missing in 2.4 */
++
++#ifndef container_of
++#define	container_of	list_entry
++#endif
++
++#ifndef likely
++#define likely(x)	(x)
++#define unlikely(x)	(x)
++#endif
++
++#ifndef BUG_ON
++#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
++#endif
++
++#ifndef WARN_ON
++#define	WARN_ON(x)	do { } while (0)
++#endif
++
++#ifndef	IRQ_NONE
++typedef void irqreturn_t;
++#define IRQ_NONE
++#define IRQ_HANDLED
++#define IRQ_RETVAL(x)
++#endif
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/n9604regs.h kernel/drivers/usb/gadget/n9604regs.h
+--- /tmp/kernel/drivers/usb/gadget/n9604regs.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/n9604regs.h	2005-04-22 17:53:19.466534306 +0200
+@@ -0,0 +1,248 @@
++/* National 9604 registers */
++
++#define USBN9604_PHYS	0x08000000
++
++extern u8 * USBN9604_Offset;
++
++static u8 last_address = 255;//an invalid address
++
++inline u8 read_9604(u8 addr) {
++	u8 tmp;
++	if (addr != last_address) {
++		outb(addr, USBN9604_Offset + 1);
++		last_address = addr;
++	}
++	tmp = inb(USBN9604_Offset);
++	return tmp;
++}
++
++inline void write_9604(u8 value, u8 addr) {
++	if (addr != last_address) {
++		outb(addr, USBN9604_Offset + 1);
++		last_address = addr;
++	}
++	outb(value, USBN9604_Offset);
++}
++
++
++	
++#define MCNTRL		0x00
++#define CCONF		0x01
++
++#define RID		0x03
++#define FAR		0x04
++#define NFSR		0x05
++#define MAEV		0x06
++#define MAMSK		0x07
++#define ALTEV		0x08
++#define ALTMSK		0x09
++#define TXEV		0x0A
++#define TXMSK		0x0B
++#define RXEV		0x0C
++#define RXMSK		0x0D
++#define NAKEV		0x0E
++#define NAKMSK		0x0F
++#define FWEV		0x10
++#define FWMSK		0x11
++#define FNH		0x12
++#define FNL		0x13
++#define DMACNTRL	0x14
++#define DMAEV		0x15
++#define DMAMSK		0x16
++#define MIR		0x17
++#define DMACNT		0x18
++#define DMAERR		0x19
++
++#define WKUP		0x1B
++
++
++
++
++#define EPC0		0x20
++#define TXD0		0x21
++#define TXS0		0x22
++#define TXC0		0x23
++
++#define RXD0		0x25
++#define RXS0		0x26
++#define RXC0		0x27
++#define EPC1		0x28
++#define TXD1		0x29
++#define TXS1		0x2A
++#define TXC1		0x2B
++#define EPC2		0x2C
++#define RXD1		0x2D
++#define RXS1		0x2E
++#define RXC1		0x2F
++#define EPC3		0x30
++#define TXD2		0x31
++#define TXS2		0x32
++#define TXC2		0x33
++#define EPC4		0x34
++#define RXD2		0x35
++#define RXS2		0x36
++#define RXC2		0x37
++#define EPC5		0x38 
++#define TXD3		0x39
++#define TXS3		0x3A
++#define TXC3		0x3B
++#define EPC6		0x3C
++#define RXD3		0x3D
++#define RXS3		0x3E
++#define RXC3		0x3F
++
++
++/* MCNTRL values */
++#define MCNTRL_SRST		(1 << 0)
++#define MCNTRL_VGE		(1 << 2)
++#define MCNTRL_NAT		(1 << 3)
++#define MCNTRL_INTOC_MASK	(3 << 6)
++#define MCNTRL_INTOC_DISABLE	0
++#define MCNTRL_INTOC_ActLowOpen	(1 << 6)
++#define MCNTRL_INTOC_ActHigh	(2 << 6)
++#define MCNTRL_INTOC_ActLowPP	(3 << 6)
++
++/* CCONF values */
++#define CCONF_CLKDIV_MASK	0x0F
++#define CCONF_CODIS		(1 << 7)
++
++/* FAR values */
++#define FAR_AD_MASK		0x7F
++#define FAR_AD_EN		0x80
++
++/* NFSR values */
++#define NFSR_NodeReset		0x0
++#define NFSR_NodeResume		0x1
++#define NFSR_NodeOperational	0x2
++#define NFSR_NodeSuspend	0x3
++
++/* MAEV values */
++#define MAEV_WARN		(1 << 0)
++#define MAEV_ALT		(1 << 1)
++#define MAEV_TX_EV		(1 << 2)
++#define MAEV_FRAME		(1 << 3)
++#define MAEV_NAK		(1 << 4)
++#define MAEV_ULD		(1 << 5)
++#define MAEV_RX_EV		(1 << 6)
++#define MAEV_INTR		(1 << 7)
++
++/* MAMSK values */
++#define MAMSK_WARN		(1 << 0)
++#define MAMSK_ALT		(1 << 1)
++#define MAMSK_TX_EV		(1 << 2)
++#define MAMSK_FRAME		(1 << 3)
++#define MAMSK_NAK		(1 << 4)
++#define MAMSK_ULD		(1 << 5)
++#define MAMSK_RX_EV		(1 << 6)
++#define MAMSK_INTR		(1 << 7)
++
++/* ALTEV values */
++
++#define ALTEV_WKUP		(1 << 1)
++#define ALTEV_DMA		(1 << 2)
++#define ALTEV_EOP		(1 << 3)
++#define ALTEV_SD3		(1 << 4)
++#define ALTEV_SD5		(1 << 5)
++#define ALTEV_RESET		(1 << 6)
++#define ALTEV_RESUME		(1 << 7)
++
++/* ALTMSK values */
++
++#define ALTMSK_WKUP		(1 << 1)
++#define ALTMSK_DMA		(1 << 2)
++#define ALTMSK_EOP		(1 << 3)
++#define ALTMSK_SD3		(1 << 4)
++#define ALTMSK_SD5		(1 << 5)
++#define ALTMSK_RESET		(1 << 6)
++#define ALTMSK_RESUME		(1 << 7)
++
++/* NAKEV values */
++
++#define NAKEV_TXFIFO0		(1 << 0)
++#define NAKEV_TXFIFO1		(1 << 1)
++#define NAKEV_TXFIFO2		(1 << 2)
++#define NAKEV_TXFIFO3		(1 << 3)
++#define NAKEV_RXFIFO0		(1 << 4)
++#define NAKEV_RXFIFO1		(1 << 5)
++#define NAKEV_RXFIFO2		(1 << 6)
++#define NAKEV_RXFIFO3		(1 << 7)
++
++
++/* WKUP values */
++#define WKUP_PNDUSB		(1 << 0)
++#define WKUP_PNDUC		(1 << 1)
++#define WKUP_ENUSB		(1 << 2)
++#define WKUP_ENUC		(1 << 3)
++#define WKUP_WKMODE		(1 << 5)
++#define WKUP_HOS		(1 << 6)
++#define WKUP_FHT		(1 << 7)
++
++/* EPC values */
++
++#define EPC_EP_MASK		0x0F    //EP0 == 0
++#define EPC_EP_EN		(1 << 4)//not EP0
++#define EPC_ISO			(1 << 5)//not EP0
++#define EPC_DEF			(1 << 6)//EP0 only
++#define EPC_STALL		(1 << 7)
++
++/* TXS values */
++
++#define TXS_TCOUNT_MASK		0x1F
++#define TXS_TX_DONE		(1 << 5)
++#define TXS_ACK_STAT		(1 << 6)
++#define TXS_TX_URUN		(1 << 7)
++
++/* TXC values */
++
++#define TXC_TX_EN		(1 << 0)
++#define TXC_LAST		(1 << 1)//not for endpoint 0
++#define TXC_TOGGLE		(1 << 2)//sets DATA1 when set
++#define TXC_FLUSH		(1 << 3)
++#define TXC_IGN_IN		(1 << 4)//only endpoint 0
++#define TXC_RFF			(1 << 4)//not for endpoint 0
++#define TXC_TFWL0		(1 << 5)//"
++#define TXC_TFWL1		(1 << 6)//"
++#define TXC_IGN_ISOMSK		(1 << 7)//"
++
++/* TXEV values */
++
++#define TXEV_FIFO0		(1 << 0)
++#define TXEV_FIFO1		(1 << 1)
++#define TXEV_FIFO2		(1 << 2)
++#define TXEV_FIFO3		(1 << 3)
++#define TXEV_UDRRN0		(1 << 4)
++#define TXEV_UDRRN1		(1 << 5)
++#define TXEV_UDRRN2		(1 << 6)
++#define TXEV_UDRRN3		(1 << 7)
++
++
++/* RXEV values */
++
++#define RXEV_FIFO0		(1 << 0)
++#define RXEV_FIFO1		(1 << 1)
++#define RXEV_FIFO2		(1 << 2)
++#define RXEV_FIFO3		(1 << 3)
++#define RXEV_OVRRN0		(1 << 4)
++#define RXEV_OVRRN1		(1 << 5)
++#define RXEV_OVRRN2		(1 << 6)
++#define RXEV_OVRRN3		(1 << 7)
++
++/* RXC values */
++
++#define RXC_RX_EN		(1 << 0)
++#define RXC_IGN_OUT		(1 << 1)
++#define RXC_IGN_SETUP		(1 << 2)
++#define RXC_FLUSH		(1 << 3)
++#define RXC_RFWL0		(1 << 5)
++#define RXC_RFWL1		(1 << 6)
++
++/* RXS values */
++
++#define RXS_RCOUNTMASK		0xF
++#define RXS_RX_LAST		(1 << 4)
++#define RXS_TOGGLE		(1 << 5)
++#define RXS_SETUP		(1 << 6)
++#define RXS_RX_ERR		(1 << 7)
++
++
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/ndis.h kernel/drivers/usb/gadget/ndis.h
+--- /tmp/kernel/drivers/usb/gadget/ndis.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/ndis.h	2005-04-22 17:53:19.469533817 +0200
+@@ -0,0 +1,217 @@
++/*
++ * ndis.h 
++ * 
++ * ntddndis.h modified by Benedikt Spranger <b.spranger@pengutronix.de>
++ * 
++ * Thanks to the cygwin development team, 
++ * espacially to Casper S. Hornstrup <chorns@users.sourceforge.net>
++ * 
++ * THIS SOFTWARE IS NOT COPYRIGHTED
++ *
++ * This source code is offered for use in the public domain. You may
++ * use, modify or distribute it freely.
++ *
++ * This code is distributed in the hope that it will be useful but
++ * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
++ * DISCLAIMED. This includes but is not limited to warranties of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
++ *
++ */
++
++#ifndef _LINUX_NDIS_H
++#define _LINUX_NDIS_H
++
++
++#define NDIS_STATUS_MULTICAST_FULL	  0xC0010009
++#define NDIS_STATUS_MULTICAST_EXISTS      0xC001000A
++#define NDIS_STATUS_MULTICAST_NOT_FOUND   0xC001000B
++
++enum NDIS_DEVICE_POWER_STATE {
++	NdisDeviceStateUnspecified = 0,
++	NdisDeviceStateD0,
++	NdisDeviceStateD1,
++	NdisDeviceStateD2,
++	NdisDeviceStateD3,
++	NdisDeviceStateMaximum
++};
++
++struct NDIS_PM_WAKE_UP_CAPABILITIES {
++	enum NDIS_DEVICE_POWER_STATE  MinMagicPacketWakeUp;
++	enum NDIS_DEVICE_POWER_STATE  MinPatternWakeUp;
++	enum NDIS_DEVICE_POWER_STATE  MinLinkChangeWakeUp;
++};
++
++/* NDIS_PNP_CAPABILITIES.Flags constants */
++#define NDIS_DEVICE_WAKE_UP_ENABLE                0x00000001
++#define NDIS_DEVICE_WAKE_ON_PATTERN_MATCH_ENABLE  0x00000002
++#define NDIS_DEVICE_WAKE_ON_MAGIC_PACKET_ENABLE   0x00000004
++
++struct NDIS_PNP_CAPABILITIES {
++	u32					Flags;
++	struct NDIS_PM_WAKE_UP_CAPABILITIES	WakeUpCapabilities;
++};
++
++struct NDIS_PM_PACKET_PATTERN {
++	u32	Priority;
++	u32	Reserved;
++	u32	MaskSize;
++	u32	PatternOffset;
++	u32	PatternSize;
++	u32	PatternFlags;
++};
++
++
++/* Required Object IDs (OIDs) */
++#define OID_GEN_SUPPORTED_LIST            0x00010101
++#define OID_GEN_HARDWARE_STATUS           0x00010102
++#define OID_GEN_MEDIA_SUPPORTED           0x00010103
++#define OID_GEN_MEDIA_IN_USE              0x00010104
++#define OID_GEN_MAXIMUM_LOOKAHEAD         0x00010105
++#define OID_GEN_MAXIMUM_FRAME_SIZE        0x00010106
++#define OID_GEN_LINK_SPEED                0x00010107
++#define OID_GEN_TRANSMIT_BUFFER_SPACE     0x00010108
++#define OID_GEN_RECEIVE_BUFFER_SPACE      0x00010109
++#define OID_GEN_TRANSMIT_BLOCK_SIZE       0x0001010A
++#define OID_GEN_RECEIVE_BLOCK_SIZE        0x0001010B
++#define OID_GEN_VENDOR_ID                 0x0001010C
++#define OID_GEN_VENDOR_DESCRIPTION        0x0001010D
++#define OID_GEN_CURRENT_PACKET_FILTER     0x0001010E
++#define OID_GEN_CURRENT_LOOKAHEAD         0x0001010F
++#define OID_GEN_DRIVER_VERSION            0x00010110
++#define OID_GEN_MAXIMUM_TOTAL_SIZE        0x00010111
++#define OID_GEN_PROTOCOL_OPTIONS          0x00010112
++#define OID_GEN_MAC_OPTIONS               0x00010113
++#define OID_GEN_MEDIA_CONNECT_STATUS      0x00010114
++#define OID_GEN_MAXIMUM_SEND_PACKETS      0x00010115
++#define OID_GEN_VENDOR_DRIVER_VERSION     0x00010116
++#define OID_GEN_SUPPORTED_GUIDS           0x00010117
++#define OID_GEN_NETWORK_LAYER_ADDRESSES   0x00010118
++#define OID_GEN_TRANSPORT_HEADER_OFFSET   0x00010119
++#define OID_GEN_MACHINE_NAME              0x0001021A
++#define OID_GEN_RNDIS_CONFIG_PARAMETER    0x0001021B
++#define OID_GEN_VLAN_ID                   0x0001021C
++
++/* Optional OIDs */
++#define OID_GEN_MEDIA_CAPABILITIES        0x00010201
++#define OID_GEN_PHYSICAL_MEDIUM           0x00010202
++
++/* Required statistics OIDs */
++#define OID_GEN_XMIT_OK                   0x00020101
++#define OID_GEN_RCV_OK                    0x00020102
++#define OID_GEN_XMIT_ERROR                0x00020103
++#define OID_GEN_RCV_ERROR                 0x00020104
++#define OID_GEN_RCV_NO_BUFFER             0x00020105
++
++/* Optional statistics OIDs */
++#define OID_GEN_DIRECTED_BYTES_XMIT       0x00020201
++#define OID_GEN_DIRECTED_FRAMES_XMIT      0x00020202
++#define OID_GEN_MULTICAST_BYTES_XMIT      0x00020203
++#define OID_GEN_MULTICAST_FRAMES_XMIT     0x00020204
++#define OID_GEN_BROADCAST_BYTES_XMIT      0x00020205
++#define OID_GEN_BROADCAST_FRAMES_XMIT     0x00020206
++#define OID_GEN_DIRECTED_BYTES_RCV        0x00020207
++#define OID_GEN_DIRECTED_FRAMES_RCV       0x00020208
++#define OID_GEN_MULTICAST_BYTES_RCV       0x00020209
++#define OID_GEN_MULTICAST_FRAMES_RCV      0x0002020A
++#define OID_GEN_BROADCAST_BYTES_RCV       0x0002020B
++#define OID_GEN_BROADCAST_FRAMES_RCV      0x0002020C
++#define OID_GEN_RCV_CRC_ERROR             0x0002020D
++#define OID_GEN_TRANSMIT_QUEUE_LENGTH     0x0002020E
++#define OID_GEN_GET_TIME_CAPS             0x0002020F
++#define OID_GEN_GET_NETCARD_TIME          0x00020210
++#define OID_GEN_NETCARD_LOAD              0x00020211
++#define OID_GEN_DEVICE_PROFILE            0x00020212
++#define OID_GEN_INIT_TIME_MS              0x00020213
++#define OID_GEN_RESET_COUNTS              0x00020214
++#define OID_GEN_MEDIA_SENSE_COUNTS        0x00020215
++#define OID_GEN_FRIENDLY_NAME             0x00020216
++#define OID_GEN_MINIPORT_INFO             0x00020217
++#define OID_GEN_RESET_VERIFY_PARAMETERS   0x00020218
++
++/* IEEE 802.3 (Ethernet) OIDs */
++#define NDIS_802_3_MAC_OPTION_PRIORITY    0x00000001
++
++#define OID_802_3_PERMANENT_ADDRESS       0x01010101
++#define OID_802_3_CURRENT_ADDRESS         0x01010102
++#define OID_802_3_MULTICAST_LIST          0x01010103
++#define OID_802_3_MAXIMUM_LIST_SIZE       0x01010104
++#define OID_802_3_MAC_OPTIONS             0x01010105
++#define OID_802_3_RCV_ERROR_ALIGNMENT     0x01020101
++#define OID_802_3_XMIT_ONE_COLLISION      0x01020102
++#define OID_802_3_XMIT_MORE_COLLISIONS    0x01020103
++#define OID_802_3_XMIT_DEFERRED           0x01020201
++#define OID_802_3_XMIT_MAX_COLLISIONS     0x01020202
++#define OID_802_3_RCV_OVERRUN             0x01020203
++#define OID_802_3_XMIT_UNDERRUN           0x01020204
++#define OID_802_3_XMIT_HEARTBEAT_FAILURE  0x01020205
++#define OID_802_3_XMIT_TIMES_CRS_LOST     0x01020206
++#define OID_802_3_XMIT_LATE_COLLISIONS    0x01020207
++
++/* OID_GEN_MINIPORT_INFO constants */
++#define NDIS_MINIPORT_BUS_MASTER                      0x00000001
++#define NDIS_MINIPORT_WDM_DRIVER                      0x00000002
++#define NDIS_MINIPORT_SG_LIST                         0x00000004
++#define NDIS_MINIPORT_SUPPORTS_MEDIA_QUERY            0x00000008
++#define NDIS_MINIPORT_INDICATES_PACKETS               0x00000010
++#define NDIS_MINIPORT_IGNORE_PACKET_QUEUE             0x00000020
++#define NDIS_MINIPORT_IGNORE_REQUEST_QUEUE            0x00000040
++#define NDIS_MINIPORT_IGNORE_TOKEN_RING_ERRORS        0x00000080
++#define NDIS_MINIPORT_INTERMEDIATE_DRIVER             0x00000100
++#define NDIS_MINIPORT_IS_NDIS_5                       0x00000200
++#define NDIS_MINIPORT_IS_CO                           0x00000400
++#define NDIS_MINIPORT_DESERIALIZE                     0x00000800
++#define NDIS_MINIPORT_REQUIRES_MEDIA_POLLING          0x00001000
++#define NDIS_MINIPORT_SUPPORTS_MEDIA_SENSE            0x00002000
++#define NDIS_MINIPORT_NETBOOT_CARD                    0x00004000
++#define NDIS_MINIPORT_PM_SUPPORTED                    0x00008000
++#define NDIS_MINIPORT_SUPPORTS_MAC_ADDRESS_OVERWRITE  0x00010000
++#define NDIS_MINIPORT_USES_SAFE_BUFFER_APIS           0x00020000
++#define NDIS_MINIPORT_HIDDEN                          0x00040000
++#define NDIS_MINIPORT_SWENUM                          0x00080000
++#define NDIS_MINIPORT_SURPRISE_REMOVE_OK              0x00100000
++#define NDIS_MINIPORT_NO_HALT_ON_SUSPEND              0x00200000
++#define NDIS_MINIPORT_HARDWARE_DEVICE                 0x00400000
++#define NDIS_MINIPORT_SUPPORTS_CANCEL_SEND_PACKETS    0x00800000
++#define NDIS_MINIPORT_64BITS_DMA                      0x01000000
++
++#define NDIS_MEDIUM_802_3		0x00000000
++#define NDIS_MEDIUM_802_5		0x00000001
++#define NDIS_MEDIUM_FDDI		0x00000002
++#define NDIS_MEDIUM_WAN			0x00000003
++#define NDIS_MEDIUM_LOCAL_TALK		0x00000004
++#define NDIS_MEDIUM_DIX			0x00000005
++#define NDIS_MEDIUM_ARCENT_RAW		0x00000006
++#define NDIS_MEDIUM_ARCENT_878_2	0x00000007
++#define NDIS_MEDIUM_ATM			0x00000008
++#define NDIS_MEDIUM_WIRELESS_LAN	0x00000009
++#define NDIS_MEDIUM_IRDA		0x0000000A
++#define NDIS_MEDIUM_BPC			0x0000000B
++#define NDIS_MEDIUM_CO_WAN		0x0000000C
++#define NDIS_MEDIUM_1394		0x0000000D
++
++#define NDIS_PACKET_TYPE_DIRECTED	0x00000001
++#define NDIS_PACKET_TYPE_MULTICAST	0x00000002
++#define NDIS_PACKET_TYPE_ALL_MULTICAST	0x00000004
++#define NDIS_PACKET_TYPE_BROADCAST	0x00000008
++#define NDIS_PACKET_TYPE_SOURCE_ROUTING	0x00000010
++#define NDIS_PACKET_TYPE_PROMISCUOUS	0x00000020
++#define NDIS_PACKET_TYPE_SMT		0x00000040
++#define NDIS_PACKET_TYPE_ALL_LOCAL	0x00000080
++#define NDIS_PACKET_TYPE_GROUP		0x00000100
++#define NDIS_PACKET_TYPE_ALL_FUNCTIONAL	0x00000200
++#define NDIS_PACKET_TYPE_FUNCTIONAL	0x00000400
++#define NDIS_PACKET_TYPE_MAC_FRAME	0x00000800
++
++#define NDIS_MEDIA_STATE_CONNECTED	0x00000000
++#define NDIS_MEDIA_STATE_DISCONNECTED	0x00000001
++
++#define NDIS_MAC_OPTION_COPY_LOOKAHEAD_DATA     0x00000001
++#define NDIS_MAC_OPTION_RECEIVE_SERIALIZED      0x00000002
++#define NDIS_MAC_OPTION_TRANSFERS_NOT_PEND      0x00000004
++#define NDIS_MAC_OPTION_NO_LOOPBACK             0x00000008
++#define NDIS_MAC_OPTION_FULL_DUPLEX             0x00000010
++#define NDIS_MAC_OPTION_EOTX_INDICATION         0x00000020
++#define NDIS_MAC_OPTION_8021P_PRIORITY          0x00000040
++#define NDIS_MAC_OPTION_RESERVED                0x80000000
++
++#endif /* _LINUX_NDIS_H */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/net2280.c kernel/drivers/usb/gadget/net2280.c
+--- /tmp/kernel/drivers/usb/gadget/net2280.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/net2280.c	2005-04-22 17:53:19.478532352 +0200
+@@ -0,0 +1,2918 @@
++/*
++ * Driver for the NetChip 2280 USB device controller.
++ * Specs and errata are available from <http://www.netchip.com>.
++ *
++ * NetChip Technology Inc. supported the development of this driver.
++ *
++ *
++ * CODE STATUS HIGHLIGHTS
++ *
++ * This driver should work well with most "gadget" drivers, including
++ * the File Storage, Serial, and Ethernet/RNDIS gadget drivers
++ * as well as Gadget Zero and Gadgetfs.
++ *
++ * DMA is enabled by default.  Drivers using transfer queues might use
++ * DMA chaining to remove IRQ latencies between transfers.  (Except when
++ * short OUT transfers happen.)  Drivers can use the req->no_interrupt
++ * hint to completely eliminate some IRQs, if a later IRQ is guaranteed
++ * and DMA chaining is enabled.
++ *
++ * Note that almost all the errata workarounds here are only needed for
++ * rev1 chips.  Rev1a silicon (0110) fixes almost all of them.
++ */
++
++/*
++ * Copyright (C) 2003 David Brownell
++ * Copyright (C) 2003 NetChip Technologies
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++#undef	DEBUG		/* messages on error and most fault paths */
++#undef	VERBOSE		/* extra debug messages (success too) */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/pci.h>
++#include <linux/kernel.h>
++#include <linux/delay.h>
++#include <linux/ioport.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/smp_lock.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include <asm/byteorder.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/unaligned.h>
++
++
++#define	DRIVER_DESC		"NetChip 2280 USB Peripheral Controller"
++#define	DRIVER_VERSION		"2004 Jan 14"
++
++#define	DMA_ADDR_INVALID	(~(dma_addr_t)0)
++#define	EP_DONTUSE		13	/* nonzero */
++
++#define USE_RDK_LEDS		/* GPIO pins control three LEDs */
++
++
++static const char driver_name [] = "net2280";
++static const char driver_desc [] = DRIVER_DESC;
++
++static const char ep0name [] = "ep0";
++static const char *ep_name [] = {
++	ep0name,
++	"ep-a", "ep-b", "ep-c", "ep-d",
++	"ep-e", "ep-f",
++};
++
++/* use_dma -- general goodness, fewer interrupts, less cpu load (vs PIO)
++ * use_dma_chaining -- dma descriptor queueing gives even more irq reduction
++ *
++ * The net2280 DMA engines are not tightly integrated with their FIFOs;
++ * not all cases are (yet) handled well in this driver or the silicon.
++ * Some gadget drivers work better with the dma support here than others.
++ * These two parameters let you use PIO or more aggressive DMA.
++ */
++static int use_dma = 1;
++static int use_dma_chaining = 0;
++
++MODULE_PARM (use_dma, "i");
++MODULE_PARM_DESC (use_dma, "true to use dma controllers");
++
++MODULE_PARM (use_dma_chaining, "i");
++MODULE_PARM_DESC (use_dma_chaining, "true to use dma descriptor queues");
++
++
++/* mode 0 == ep-{a,b,c,d} 1K fifo each
++ * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable
++ * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable
++ */
++static ushort fifo_mode = 0;
++
++MODULE_PARM (fifo_mode, "h");
++MODULE_PARM_DESC (fifo_mode, "net2280 fifo mode");
++
++
++#define	DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out")
++
++#if defined(USE_SYSFS_DEBUG_FILES) || defined (DEBUG)
++static char *type_string (u8 bmAttributes)
++{
++	switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
++	case USB_ENDPOINT_XFER_BULK:	return "bulk";
++	case USB_ENDPOINT_XFER_ISOC:	return "iso";
++	case USB_ENDPOINT_XFER_INT:	return "intr";
++	};
++	return "control";
++}
++#endif
++
++#include "net2280.h"
++
++#define valid_bit	__constant_cpu_to_le32 (1 << VALID_BIT)
++#define dma_done_ie	__constant_cpu_to_le32 (1 << DMA_DONE_INTERRUPT_ENABLE)
++
++/*-------------------------------------------------------------------------*/
++
++static int
++net2280_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
++{
++	struct net2280		*dev;
++	struct net2280_ep	*ep;
++	u32			max, tmp;
++	unsigned long		flags;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || !desc || ep->desc || _ep->name == ep0name
++			|| desc->bDescriptorType != USB_DT_ENDPOINT)
++		return -EINVAL;
++	dev = ep->dev;
++	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return -ESHUTDOWN;
++
++	/* erratum 0119 workaround ties up an endpoint number */
++	if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE)
++		return -EDOM;
++
++	/* sanity check ep-e/ep-f since their fifos are small */
++	max = le16_to_cpu (desc->wMaxPacketSize) & 0x1fff;
++	if (ep->num > 4 && max > 64)
++		return -ERANGE;
++
++	spin_lock_irqsave (&dev->lock, flags);
++	_ep->maxpacket = max & 0x7ff;
++	ep->desc = desc;
++
++	/* ep_reset() has already been called */
++	ep->stopped = 0;
++	ep->out_overflow = 0;
++
++	/* set speed-dependent max packet; may kick in high bandwidth */
++	set_idx_reg (dev->regs, REG_EP_MAXPKT (dev, ep->num), max);
++
++	/* FIFO lines can't go to different packets.  PIO is ok, so
++	 * use it instead of troublesome (non-bulk) multi-packet DMA.
++	 */
++	if (ep->dma && (max % 4) != 0 && use_dma_chaining) {
++		DEBUG (ep->dev, "%s, no dma for maxpacket %d\n",
++			ep->ep.name, ep->ep.maxpacket);
++		ep->dma = NULL;
++	}
++
++	/* set type, direction, address; reset fifo counters */
++	writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat);
++	tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
++	if (tmp == USB_ENDPOINT_XFER_INT) {
++		/* erratum 0105 workaround prevents hs NYET */
++		if (dev->chiprev == 0100
++				&& dev->gadget.speed == USB_SPEED_HIGH
++				&& !(desc->bEndpointAddress & USB_DIR_IN))
++			writel ((1 << CLEAR_NAK_OUT_PACKETS_MODE),
++				&ep->regs->ep_rsp);
++	} else if (tmp == USB_ENDPOINT_XFER_BULK) {
++		/* catch some particularly blatant driver bugs */
++		if ((dev->gadget.speed == USB_SPEED_HIGH
++					&& max != 512)
++				|| (dev->gadget.speed == USB_SPEED_FULL
++					&& max > 64)) {
++			spin_unlock_irqrestore (&dev->lock, flags);
++			return -ERANGE;
++		}
++	}
++	ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC) ? 1 : 0;
++	tmp <<= ENDPOINT_TYPE;
++	tmp |= desc->bEndpointAddress;
++	tmp |= (4 << ENDPOINT_BYTE_COUNT);	/* default full fifo lines */
++	tmp |= 1 << ENDPOINT_ENABLE;
++	wmb ();
++
++	/* for OUT transfers, block the rx fifo until a read is posted */
++	ep->is_in = (tmp & USB_DIR_IN) != 0;
++	if (!ep->is_in)
++		writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
++
++	writel (tmp, &ep->regs->ep_cfg);
++
++	/* enable irqs */
++	if (!ep->dma) {				/* pio, per-packet */
++		tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0);
++		writel (tmp, &dev->regs->pciirqenb0);
++
++		tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
++			| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
++			| readl (&ep->regs->ep_irqenb);
++		writel (tmp, &ep->regs->ep_irqenb);
++	} else {				/* dma, per-request */
++		tmp = (1 << (8 + ep->num));	/* completion */
++		tmp |= readl (&dev->regs->pciirqenb1);
++		writel (tmp, &dev->regs->pciirqenb1);
++
++		/* for short OUT transfers, dma completions can't
++		 * advance the queue; do it pio-style, by hand.
++		 * NOTE erratum 0112 workaround #2
++		 */
++		if ((desc->bEndpointAddress & USB_DIR_IN) == 0) {
++			tmp = (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE);
++			writel (tmp, &ep->regs->ep_irqenb);
++
++			tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0);
++			writel (tmp, &dev->regs->pciirqenb0);
++		}
++	}
++
++	tmp = desc->bEndpointAddress;
++	DEBUG (dev, "enabled %s (ep%d%s-%s) %s max %04x\n",
++		_ep->name, tmp & 0x0f, DIR_STRING (tmp),
++		type_string (desc->bmAttributes),
++		ep->dma ? "dma" : "pio", max);
++
++	/* pci writes may still be posted */
++	spin_unlock_irqrestore (&dev->lock, flags);
++	return 0;
++}
++
++static int handshake (u32 *ptr, u32 mask, u32 done, int usec)
++{
++	u32	result;
++
++	do {
++		result = readl (ptr);
++		if (result == ~(u32)0)		/* "device unplugged" */
++			return -ENODEV;
++		result &= mask;
++		if (result == done)
++			return 0;
++		udelay (1);
++		usec--;
++	} while (usec > 0);
++	return -ETIMEDOUT;
++}
++
++static struct usb_ep_ops net2280_ep_ops;
++
++static void ep_reset (struct net2280_regs *regs, struct net2280_ep *ep)
++{
++	u32		tmp;
++
++	ep->desc = NULL;
++	INIT_LIST_HEAD (&ep->queue);
++
++	ep->ep.maxpacket = ~0;
++	ep->ep.ops = &net2280_ep_ops;
++
++	/* disable the dma, irqs, endpoint... */
++	if (ep->dma) {
++		writel (0, &ep->dma->dmactl);
++		writel (  (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT)
++			| (1 << DMA_TRANSACTION_DONE_INTERRUPT)
++			| (1 << DMA_ABORT)
++			, &ep->dma->dmastat);
++
++		tmp = readl (&regs->pciirqenb0);
++		tmp &= ~(1 << ep->num);
++		writel (tmp, &regs->pciirqenb0);
++	} else {
++		tmp = readl (&regs->pciirqenb1);
++		tmp &= ~(1 << (8 + ep->num));	/* completion */
++		writel (tmp, &regs->pciirqenb1);
++	}
++	writel (0, &ep->regs->ep_irqenb);
++
++	/* init to our chosen defaults, notably so that we NAK OUT
++	 * packets until the driver queues a read (+note erratum 0112)
++	 */
++	writel (  (1 << SET_NAK_OUT_PACKETS_MODE)
++		| (1 << SET_NAK_OUT_PACKETS)
++		| (1 << CLEAR_EP_HIDE_STATUS_PHASE)
++		| (1 << CLEAR_INTERRUPT_MODE)
++		| (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
++		| (1 << CLEAR_ENDPOINT_TOGGLE)
++		| (1 << CLEAR_ENDPOINT_HALT)
++		, &ep->regs->ep_rsp);
++
++	/* scrub most status bits, and flush any fifo state */
++	writel (  (1 << TIMEOUT)
++		| (1 << USB_STALL_SENT)
++		| (1 << USB_IN_NAK_SENT)
++		| (1 << USB_IN_ACK_RCVD)
++		| (1 << USB_OUT_PING_NAK_SENT)
++		| (1 << USB_OUT_ACK_SENT)
++		| (1 << FIFO_OVERFLOW)
++		| (1 << FIFO_UNDERFLOW)
++		| (1 << FIFO_FLUSH)
++		| (1 << SHORT_PACKET_OUT_DONE_INTERRUPT)
++		| (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)
++		| (1 << DATA_PACKET_RECEIVED_INTERRUPT)
++		| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
++		| (1 << DATA_OUT_PING_TOKEN_INTERRUPT)
++		| (1 << DATA_IN_TOKEN_INTERRUPT)
++		, &ep->regs->ep_stat);
++
++	/* fifo size is handled separately */
++}
++
++static void nuke (struct net2280_ep *);
++
++static int net2280_disable (struct usb_ep *_ep)
++{
++	struct net2280_ep	*ep;
++	unsigned long		flags;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || !ep->desc || _ep->name == ep0name)
++		return -EINVAL;
++
++	spin_lock_irqsave (&ep->dev->lock, flags);
++	nuke (ep);
++	ep_reset (ep->dev->regs, ep);
++
++	VDEBUG (ep->dev, "disabled %s %s\n",
++			ep->dma ? "dma" : "pio", _ep->name);
++
++	/* synch memory views with the device */
++	(void) readl (&ep->regs->ep_cfg);
++
++	if (use_dma && !ep->dma && ep->num >= 1 && ep->num <= 4)
++		ep->dma = &ep->dev->dma [ep->num - 1];
++
++	spin_unlock_irqrestore (&ep->dev->lock, flags);
++	return 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_request *
++net2280_alloc_request (struct usb_ep *_ep, int gfp_flags)
++{
++	struct net2280_ep	*ep;
++	struct net2280_request	*req;
++
++	if (!_ep)
++		return NULL;
++	ep = container_of (_ep, struct net2280_ep, ep);
++
++	req = kmalloc (sizeof *req, gfp_flags);
++	if (!req)
++		return NULL;
++
++	memset (req, 0, sizeof *req);
++	req->req.dma = DMA_ADDR_INVALID;
++	INIT_LIST_HEAD (&req->queue);
++
++	/* this dma descriptor may be swapped with the previous dummy */
++	if (ep->dma) {
++		struct net2280_dma	*td;
++
++		td = pci_pool_alloc (ep->dev->requests, gfp_flags,
++				&req->td_dma);
++		if (!td) {
++			kfree (req);
++			return NULL;
++		}
++		td->dmacount = 0;	/* not VALID */
++		td->dmaaddr = __constant_cpu_to_le32 (DMA_ADDR_INVALID);
++		td->dmadesc = td->dmaaddr;
++		req->td = td;
++	}
++	return &req->req;
++}
++
++static void
++net2280_free_request (struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct net2280_ep	*ep;
++	struct net2280_request	*req;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || !_req)
++		return;
++
++	req = container_of (_req, struct net2280_request, req);
++	WARN_ON (!list_empty (&req->queue));
++	if (req->td)
++		pci_pool_free (ep->dev->requests, req->td, req->td_dma);
++	kfree (req);
++}
++
++/*-------------------------------------------------------------------------*/
++
++#undef USE_KMALLOC
++
++/* many common platforms have dma-coherent caches, which means that it's
++ * safe to use kmalloc() memory for all i/o buffers without using any
++ * cache flushing calls.  (unless you're trying to share cache lines
++ * between dma and non-dma activities, which is a slow idea in any case.)
++ *
++ * other platforms need more care, with 2.5 having a moderately general
++ * solution (which falls down for allocations smaller than one page)
++ * that improves significantly on the 2.4 PCI allocators by removing
++ * the restriction that memory never be freed in_interrupt().
++ */
++#if	defined(CONFIG_X86)
++#define USE_KMALLOC
++
++#elif	defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
++#define USE_KMALLOC
++
++#elif	defined(CONFIG_MIPS) && !defined(CONFIG_NONCOHERENT_IO)
++#define USE_KMALLOC
++
++/* FIXME there are other cases, including an x86-64 one ...  */
++#endif
++
++/* allocating buffers this way eliminates dma mapping overhead, which
++ * on some platforms will mean eliminating a per-io buffer copy.  with
++ * some kinds of system caches, further tweaks may still be needed.
++ */
++static void *
++net2280_alloc_buffer (
++	struct usb_ep		*_ep,
++	unsigned		bytes,
++	dma_addr_t		*dma,
++	int			gfp_flags
++)
++{
++	void			*retval;
++	struct net2280_ep	*ep;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep)
++		return NULL;
++	*dma = DMA_ADDR_INVALID;
++
++#if	defined(USE_KMALLOC)
++	retval = kmalloc(bytes, gfp_flags);
++	if (retval)
++		*dma = virt_to_phys(retval);
++#else
++	if (ep->dma) {
++		/* one problem with this call is that it wastes memory on
++		 * typical 1/N page allocations: it allocates 1..N pages.
++		 * another is that it always uses GFP_ATOMIC.
++		 */
++#warning Using pci_alloc_consistent even with buffers smaller than a page.
++		retval = pci_alloc_consistent(ep->dev->pdev, bytes, dma);
++	} else
++		retval = kmalloc(bytes, gfp_flags);
++#endif
++	return retval;
++}
++
++static void
++net2280_free_buffer (
++	struct usb_ep *_ep,
++	void *buf,
++	dma_addr_t dma,
++	unsigned bytes
++) {
++	/* free memory into the right allocator */
++#ifndef	USE_KMALLOC
++	if (dma != DMA_ADDR_INVALID) {
++		struct net2280_ep	*ep;
++
++		ep = container_of(_ep, struct net2280_ep, ep);
++		if (!_ep)
++			return;
++		/* one problem with this call is that some platforms
++		 * don't allow it to be used in_irq().
++		 */
++		pci_free_consistent(ep->dev->pdev, bytes, buf, dma);
++	} else
++#endif
++		kfree (buf);
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* load a packet into the fifo we use for usb IN transfers.
++ * works for all endpoints.
++ *
++ * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo
++ * at a time, but this code is simpler because it knows it only writes
++ * one packet.  ep-a..ep-d should use dma instead.
++ */
++static void
++write_fifo (struct net2280_ep *ep, struct usb_request *req)
++{
++	struct net2280_ep_regs	*regs = ep->regs;
++	u8			*buf;
++	u32			tmp;
++	unsigned		count, total;
++
++	/* INVARIANT:  fifo is currently empty. (testable) */
++
++	if (req) {
++		buf = req->buf + req->actual;
++		prefetch (buf);
++		total = req->length - req->actual;
++	} else {
++		total = 0;
++		buf = NULL;
++	}
++
++	/* write just one packet at a time */
++	count = ep->ep.maxpacket;
++	if (count > total)	/* min() cannot be used on a bitfield */
++		count = total;
++
++	VDEBUG (ep->dev, "write %s fifo (IN) %d bytes%s req %p\n",
++			ep->ep.name, count,
++			(count != ep->ep.maxpacket) ? " (short)" : "",
++			req);
++	while (count >= 4) {
++		/* NOTE be careful if you try to align these. fifo lines
++		 * should normally be full (4 bytes) and successive partial
++		 * lines are ok only in certain cases.
++		 */
++		tmp = get_unaligned ((u32 *)buf);
++		cpu_to_le32s (&tmp);
++		writel (tmp, &regs->ep_data);
++		buf += 4;
++		count -= 4;
++	}
++
++	/* last fifo entry is "short" unless we wrote a full packet.
++	 * also explicitly validate last word in (periodic) transfers
++	 * when maxpacket is not a multiple of 4 bytes.
++	 */
++	if (count || total < ep->ep.maxpacket) {
++		tmp = count ? get_unaligned ((u32 *)buf) : count;
++		cpu_to_le32s (&tmp);
++		set_fifo_bytecount (ep, count & 0x03);
++		writel (tmp, &regs->ep_data);
++	}
++
++	/* pci writes may still be posted */
++}
++
++/* work around erratum 0106: PCI and USB race over the OUT fifo.
++ * caller guarantees chiprev 0100, out endpoint is NAKing, and
++ * there's no real data in the fifo.
++ *
++ * NOTE:  also used in cases where that erratum doesn't apply:
++ * where the host wrote "too much" data to us.
++ */
++static void out_flush (struct net2280_ep *ep)
++{
++	u32	*statp, tmp;
++
++	ASSERT_OUT_NAKING (ep);
++
++	statp = &ep->regs->ep_stat;
++	writel (  (1 << DATA_OUT_PING_TOKEN_INTERRUPT)
++		| (1 << DATA_PACKET_RECEIVED_INTERRUPT)
++		, statp);
++	writel ((1 << FIFO_FLUSH), statp);
++	mb ();
++	tmp = readl (statp);
++	if (tmp & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)
++			/* high speed did bulk NYET; fifo isn't filling */
++			&& ep->dev->gadget.speed == USB_SPEED_FULL) {
++		unsigned	usec;
++
++		usec = 50;		/* 64 byte bulk/interrupt */
++		handshake (statp, (1 << USB_OUT_PING_NAK_SENT),
++				(1 << USB_OUT_PING_NAK_SENT), usec);
++		/* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */
++	}
++}
++
++/* unload packet(s) from the fifo we use for usb OUT transfers.
++ * returns true iff the request completed, because of short packet
++ * or the request buffer having filled with full packets.
++ *
++ * for ep-a..ep-d this will read multiple packets out when they
++ * have been accepted.
++ */
++static int
++read_fifo (struct net2280_ep *ep, struct net2280_request *req)
++{
++	struct net2280_ep_regs	*regs = ep->regs;
++	u8			*buf = req->req.buf + req->req.actual;
++	unsigned		count, tmp, is_short;
++	unsigned		cleanup = 0, prevent = 0;
++
++	/* erratum 0106 ... packets coming in during fifo reads might
++	 * be incompletely rejected.  not all cases have workarounds.
++	 */
++	if (ep->dev->chiprev == 0x0100
++			&& ep->dev->gadget.speed == USB_SPEED_FULL) {
++		udelay (1);
++		tmp = readl (&ep->regs->ep_stat);
++		if ((tmp & (1 << NAK_OUT_PACKETS)))
++			cleanup = 1;
++		else if ((tmp & (1 << FIFO_FULL))) {
++			start_out_naking (ep);
++			prevent = 1;
++		}
++		/* else: hope we don't see the problem */
++	}
++
++	/* never overflow the rx buffer. the fifo reads packets until
++	 * it sees a short one; we might not be ready for them all.
++	 */
++	prefetchw (buf);
++	count = readl (&regs->ep_avail);
++	if (unlikely (count == 0)) {
++		udelay (1);
++		tmp = readl (&ep->regs->ep_stat);
++		count = readl (&regs->ep_avail);
++		/* handled that data already? */
++		if (count == 0 && (tmp & (1 << NAK_OUT_PACKETS)) == 0)
++			return 0;
++	}
++
++	tmp = req->req.length - req->req.actual;
++	if (count > tmp) {
++		/* as with DMA, data overflow gets flushed */
++		if ((tmp % ep->ep.maxpacket) != 0) {
++			ERROR (ep->dev,
++				"%s out fifo %d bytes, expected %d\n",
++				ep->ep.name, count, tmp);
++			req->req.status = -EOVERFLOW;
++			cleanup = 1;
++			/* NAK_OUT_PACKETS will be set, so flushing is safe;
++			 * the next read will start with the next packet
++			 */
++		} /* else it's a ZLP, no worries */
++		count = tmp;
++	}
++	req->req.actual += count;
++
++	is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0);
++
++	VDEBUG (ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n",
++			ep->ep.name, count, is_short ? " (short)" : "",
++			cleanup ? " flush" : "", prevent ? " nak" : "",
++			req, req->req.actual, req->req.length);
++
++	while (count >= 4) {
++		tmp = readl (&regs->ep_data);
++		cpu_to_le32s (&tmp);
++		put_unaligned (tmp, (u32 *)buf);
++		buf += 4;
++		count -= 4;
++	}
++	if (count) {
++		tmp = readl (&regs->ep_data);
++		/* LE conversion is implicit here: */
++		do {
++			*buf++ = (u8) tmp;
++			tmp >>= 8;
++		} while (--count);
++	}
++	if (cleanup)
++		out_flush (ep);
++	if (prevent) {
++		writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
++		(void) readl (&ep->regs->ep_rsp);
++	}
++
++	return is_short || ((req->req.actual == req->req.length)
++				&& !req->req.zero);
++}
++
++/* fill out dma descriptor to match a given request */
++static void
++fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid)
++{
++	struct net2280_dma	*td = req->td;
++	u32			dmacount = req->req.length;
++
++	/* don't let DMA continue after a short OUT packet,
++	 * so overruns can't affect the next transfer.
++	 * in case of overruns on max-size packets, we can't
++	 * stop the fifo from filling but we can flush it.
++	 */
++	if (ep->is_in)
++		dmacount |= (1 << DMA_DIRECTION);
++	else if ((dmacount % ep->ep.maxpacket) != 0)
++		dmacount |= (1 << END_OF_CHAIN);
++
++	req->valid = valid;
++	if (valid)
++		dmacount |= (1 << VALID_BIT);
++	if (likely(!req->req.no_interrupt || !use_dma_chaining))
++		dmacount |= (1 << DMA_DONE_INTERRUPT_ENABLE);
++
++	/* td->dmadesc = previously set by caller */
++	td->dmaaddr = cpu_to_le32p (&req->req.dma);
++
++	/* 2280 may be polling VALID_BIT through ep->dma->dmadesc */
++	wmb ();
++	td->dmacount = cpu_to_le32p (&dmacount);
++}
++
++static const u32 dmactl_default =
++		  (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT)
++		| (1 << DMA_CLEAR_COUNT_ENABLE)
++		/* erratum 0116 workaround part 1 (use POLLING) */
++		| (POLL_100_USEC << DESCRIPTOR_POLLING_RATE)
++		| (1 << DMA_VALID_BIT_POLLING_ENABLE)
++		| (1 << DMA_VALID_BIT_ENABLE)
++		| (1 << DMA_SCATTER_GATHER_ENABLE)
++		/* erratum 0116 workaround part 2 (no AUTOSTART) */
++		| (1 << DMA_ENABLE);
++
++static inline void spin_stop_dma (struct net2280_dma_regs *dma)
++{
++	handshake (&dma->dmactl, (1 << DMA_ENABLE), 0, 50);
++}
++
++static inline void stop_dma (struct net2280_dma_regs *dma)
++{
++	writel (readl (&dma->dmactl) & ~(1 << DMA_ENABLE), &dma->dmactl);
++	spin_stop_dma (dma);
++}
++
++static void start_queue (struct net2280_ep *ep, u32 dmactl, u32 td_dma)
++{
++	struct net2280_dma_regs	*dma = ep->dma;
++
++	writel ((1 << VALID_BIT) | (ep->is_in << DMA_DIRECTION),
++			&dma->dmacount);
++	writel (readl (&dma->dmastat), &dma->dmastat);
++
++	writel (td_dma, &dma->dmadesc);
++	writel (dmactl, &dma->dmactl);
++
++	/* erratum 0116 workaround part 3:  pci arbiter away from net2280 */
++	(void) readl (&ep->dev->pci->pcimstctl);
++
++	writel ((1 << DMA_START), &dma->dmastat);
++
++	if (!ep->is_in)
++		stop_out_naking (ep);
++}
++
++static void start_dma (struct net2280_ep *ep, struct net2280_request *req)
++{
++	u32			tmp;
++	struct net2280_dma_regs	*dma = ep->dma;
++
++	/* FIXME can't use DMA for ZLPs */
++
++	/* on this path we "know" there's no dma active (yet) */
++	WARN_ON (readl (&dma->dmactl) & (1 << DMA_ENABLE));
++	writel (0, &ep->dma->dmactl);
++
++	/* previous OUT packet might have been short */
++	if (!ep->is_in && ((tmp = readl (&ep->regs->ep_stat))
++		 		& (1 << NAK_OUT_PACKETS)) != 0) {
++		writel ((1 << SHORT_PACKET_TRANSFERRED_INTERRUPT),
++			&ep->regs->ep_stat);
++
++		tmp = readl (&ep->regs->ep_avail);
++		if (tmp) {
++			writel (readl (&dma->dmastat), &dma->dmastat);
++
++			/* transfer all/some fifo data */
++			writel (req->req.dma, &dma->dmaaddr);
++			tmp = min (tmp, req->req.length);
++
++			/* dma irq, faking scatterlist status */
++			req->td->dmacount = cpu_to_le32 (req->req.length - tmp);
++			writel ((1 << DMA_DONE_INTERRUPT_ENABLE)
++				| tmp, &dma->dmacount);
++			req->td->dmadesc = 0;
++			req->valid = 1;
++
++			writel ((1 << DMA_ENABLE), &dma->dmactl);
++			writel ((1 << DMA_START), &dma->dmastat);
++			return;
++		}
++	}
++
++	tmp = dmactl_default;
++
++	/* force packet boundaries between dma requests, but prevent the
++	 * controller from automagically writing a last "short" packet
++	 * (zero length) unless the driver explicitly said to do that.
++	 */
++	if (ep->is_in) {
++		if (likely ((req->req.length % ep->ep.maxpacket) != 0
++				|| req->req.zero)) {
++			tmp |= (1 << DMA_FIFO_VALIDATE);
++			ep->in_fifo_validate = 1;
++		} else
++			ep->in_fifo_validate = 0;
++	}
++
++	/* init req->td, pointing to the current dummy */
++	req->td->dmadesc = cpu_to_le32 (ep->td_dma);
++	fill_dma_desc (ep, req, 1);
++
++	if (!use_dma_chaining)
++		req->td->dmacount |= __constant_cpu_to_le32 (1 << END_OF_CHAIN);
++
++	start_queue (ep, tmp, req->td_dma);
++}
++
++static inline void
++queue_dma (struct net2280_ep *ep, struct net2280_request *req, int valid)
++{
++	struct net2280_dma	*end;
++	dma_addr_t		tmp;
++
++	/* swap new dummy for old, link; fill and maybe activate */
++	end = ep->dummy;
++	ep->dummy = req->td;
++	req->td = end;
++
++	tmp = ep->td_dma;
++	ep->td_dma = req->td_dma;
++	req->td_dma = tmp;
++
++	end->dmadesc = cpu_to_le32 (ep->td_dma);
++
++	fill_dma_desc (ep, req, valid);
++}
++
++static void
++done (struct net2280_ep *ep, struct net2280_request *req, int status)
++{
++	struct net2280		*dev;
++	unsigned		stopped = ep->stopped;
++
++	list_del_init (&req->queue);
++
++	if (req->req.status == -EINPROGRESS)
++		req->req.status = status;
++	else
++		status = req->req.status;
++
++	dev = ep->dev;
++	if (req->mapped) {
++		pci_unmap_single (dev->pdev, req->req.dma, req->req.length,
++			ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
++		req->req.dma = DMA_ADDR_INVALID;
++		req->mapped = 0;
++	}
++
++	if (status && status != -ESHUTDOWN)
++		VDEBUG (dev, "complete %s req %p stat %d len %u/%u\n",
++			ep->ep.name, &req->req, status,
++			req->req.actual, req->req.length);
++
++	/* don't modify queue heads during completion callback */
++	ep->stopped = 1;
++	spin_unlock (&dev->lock);
++	req->req.complete (&ep->ep, &req->req);
++	spin_lock (&dev->lock);
++	ep->stopped = stopped;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static int
++net2280_queue (struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
++{
++	struct net2280_request	*req;
++	struct net2280_ep	*ep;
++	struct net2280		*dev;
++	unsigned long		flags;
++
++	/* we always require a cpu-view buffer, so that we can
++	 * always use pio (as fallback or whatever).
++	 */
++	req = container_of (_req, struct net2280_request, req);
++	if (!_req || !_req->complete || !_req->buf
++			|| !list_empty (&req->queue))
++		return -EINVAL;
++	if (_req->length > (~0 & DMA_BYTE_COUNT_MASK))
++		return -EDOM;
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || (!ep->desc && ep->num != 0))
++		return -EINVAL;
++	dev = ep->dev;
++	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return -ESHUTDOWN;
++
++	/* FIXME implement PIO fallback for ZLPs with DMA */
++	if (ep->dma && _req->length == 0)
++		return -EOPNOTSUPP;
++
++	/* set up dma mapping in case the caller didn't */
++	if (ep->dma && _req->dma == DMA_ADDR_INVALID) {
++		_req->dma = pci_map_single (dev->pdev, _req->buf, _req->length,
++			ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
++		req->mapped = 1;
++	}
++
++#if 0
++	VDEBUG (dev, "%s queue req %p, len %d buf %p\n",
++			_ep->name, _req, _req->length, _req->buf);
++#endif
++
++	spin_lock_irqsave (&dev->lock, flags);
++
++	_req->status = -EINPROGRESS;
++	_req->actual = 0;
++
++	/* kickstart this i/o queue? */
++	if (list_empty (&ep->queue) && !ep->stopped) {
++		/* use DMA if the endpoint supports it, else pio */
++		if (ep->dma)
++			start_dma (ep, req);
++		else {
++			/* maybe there's no control data, just status ack */
++			if (ep->num == 0 && _req->length == 0) {
++				allow_status (ep);
++				done (ep, req, 0);
++				VDEBUG (dev, "%s status ack\n", ep->ep.name);
++				goto done;
++			}
++
++			/* PIO ... stuff the fifo, or unblock it.  */
++			if (ep->is_in)
++				write_fifo (ep, _req);
++			else if (list_empty (&ep->queue)) {
++				u32	s;
++
++				/* OUT FIFO might have packet(s) buffered */
++				s = readl (&ep->regs->ep_stat);
++				if ((s & (1 << FIFO_EMPTY)) == 0) {
++					/* note:  _req->short_not_ok is
++					 * ignored here since PIO _always_
++					 * stops queue advance here, and
++					 * _req->status doesn't change for
++					 * short reads (only _req->actual)
++					 */
++					if (read_fifo (ep, req)) {
++						done (ep, req, 0);
++						if (ep->num == 0)
++							allow_status (ep);
++						/* don't queue it */
++						req = NULL;
++					} else
++						s = readl (&ep->regs->ep_stat);
++				}
++
++				/* don't NAK, let the fifo fill */
++				if (req && (s & (1 << NAK_OUT_PACKETS)))
++					writel ((1 << CLEAR_NAK_OUT_PACKETS),
++							&ep->regs->ep_rsp);
++			}
++		}
++
++	} else if (ep->dma) {
++		int	valid = 1;
++
++		if (ep->is_in) {
++			int	expect;
++
++			/* preventing magic zlps is per-engine state, not
++			 * per-transfer; irq logic must recover hiccups.
++			 */
++			expect = likely (req->req.zero
++				|| (req->req.length % ep->ep.maxpacket) != 0);
++			if (expect != ep->in_fifo_validate)
++				valid = 0;
++		}
++		queue_dma (ep, req, valid);
++
++	} /* else the irq handler advances the queue. */
++
++	if (req)
++		list_add_tail (&req->queue, &ep->queue);
++done:
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	/* pci writes may still be posted */
++	return 0;
++}
++
++static inline void
++dma_done (
++	struct net2280_ep *ep,
++	struct net2280_request *req,
++	u32 dmacount,
++	int status
++)
++{
++	req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount);
++	done (ep, req, status);
++}
++
++static void restart_dma (struct net2280_ep *ep);
++
++static void scan_dma_completions (struct net2280_ep *ep)
++{
++	/* only look at descriptors that were "naturally" retired,
++	 * so fifo and list head state won't matter
++	 */
++	while (!list_empty (&ep->queue)) {
++		struct net2280_request	*req;
++		u32			tmp;
++
++		req = list_entry (ep->queue.next,
++				struct net2280_request, queue);
++		if (!req->valid)
++			break;
++		rmb ();
++		tmp = le32_to_cpup (&req->td->dmacount);
++		if ((tmp & (1 << VALID_BIT)) != 0)
++			break;
++
++		/* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short"
++		 * cases where DMA must be aborted; this code handles
++		 * all non-abort DMA completions.
++		 */
++		if (unlikely (req->td->dmadesc == 0)) {
++			/* paranoia */
++			tmp = readl (&ep->dma->dmacount);
++			if (tmp & DMA_BYTE_COUNT_MASK)
++				break;
++			/* single transfer mode */
++			dma_done (ep, req, tmp, 0);
++			break;
++		} else if (!ep->is_in
++				&& (req->req.length % ep->ep.maxpacket) != 0) {
++			tmp = readl (&ep->regs->ep_stat);
++
++			/* AVOID TROUBLE HERE by not issuing short reads from
++			 * your gadget driver.  That helps avoids errata 0121,
++			 * 0122, and 0124; not all cases trigger the warning.
++			 */
++			if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) {
++				WARN (ep->dev, "%s lost packet sync!\n",
++						ep->ep.name);
++				req->req.status = -EOVERFLOW;
++			} else if ((tmp = readl (&ep->regs->ep_avail)) != 0) {
++				/* fifo gets flushed later */
++				ep->out_overflow = 1;
++				DEBUG (ep->dev, "%s dma, discard %d len %d\n",
++						ep->ep.name, tmp,
++						req->req.length);
++				req->req.status = -EOVERFLOW;
++			}
++		}
++		dma_done (ep, req, tmp, 0);
++	}
++}
++
++static void restart_dma (struct net2280_ep *ep)
++{
++	struct net2280_request	*req;
++	u32			dmactl = dmactl_default;
++
++	if (ep->stopped)
++		return;
++	req = list_entry (ep->queue.next, struct net2280_request, queue);
++
++	if (!use_dma_chaining) {
++		start_dma (ep, req);
++		return;
++	}
++
++	/* the 2280 will be processing the queue unless queue hiccups after
++	 * the previous transfer:
++	 *  IN:   wanted automagic zlp, head doesn't (or vice versa)
++	 *        DMA_FIFO_VALIDATE doesn't init from dma descriptors.
++	 *  OUT:  was "usb-short", we must restart.
++	 */
++	if (ep->is_in && !req->valid) {
++		struct net2280_request	*entry, *prev = NULL;
++		int			reqmode, done = 0;
++
++		DEBUG (ep->dev, "%s dma hiccup td %p\n", ep->ep.name, req->td);
++		ep->in_fifo_validate = likely (req->req.zero
++			|| (req->req.length % ep->ep.maxpacket) != 0);
++		if (ep->in_fifo_validate)
++			dmactl |= (1 << DMA_FIFO_VALIDATE);
++		list_for_each_entry (entry, &ep->queue, queue) {
++			u32		dmacount;
++
++			if (entry == req)
++				continue;
++			dmacount = entry->td->dmacount;
++			if (!done) {
++				reqmode = likely (entry->req.zero
++					|| (entry->req.length
++						% ep->ep.maxpacket) != 0);
++				if (reqmode == ep->in_fifo_validate) {
++					entry->valid = 1;
++					dmacount |= valid_bit;
++					entry->td->dmacount = dmacount;
++					prev = entry;
++					continue;
++				} else {
++					/* force a hiccup */
++					prev->td->dmacount |= dma_done_ie;
++					done = 1;
++				}
++			}
++
++			/* walk the rest of the queue so unlinks behave */
++			entry->valid = 0;
++			dmacount &= ~valid_bit;
++			entry->td->dmacount = dmacount;
++			prev = entry;
++		}
++	}
++
++	writel (0, &ep->dma->dmactl);
++	start_queue (ep, dmactl, req->td_dma);
++}
++
++static void abort_dma (struct net2280_ep *ep)
++{
++	/* abort the current transfer */
++	if (likely (!list_empty (&ep->queue))) {
++		/* FIXME work around errata 0121, 0122, 0124 */
++		writel ((1 << DMA_ABORT), &ep->dma->dmastat);
++		spin_stop_dma (ep->dma);
++	} else
++		stop_dma (ep->dma);
++	scan_dma_completions (ep);
++}
++
++/* dequeue ALL requests */
++static void nuke (struct net2280_ep *ep)
++{
++	struct net2280_request	*req;
++
++	/* called with spinlock held */
++	ep->stopped = 1;
++	if (ep->dma)
++		abort_dma (ep);
++	while (!list_empty (&ep->queue)) {
++		req = list_entry (ep->queue.next,
++				struct net2280_request,
++				queue);
++		done (ep, req, -ESHUTDOWN);
++	}
++}
++
++/* dequeue JUST ONE request */
++static int net2280_dequeue (struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct net2280_ep	*ep;
++	struct net2280_request	*req;
++	unsigned long		flags;
++	u32			dmactl;
++	int			stopped;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || (!ep->desc && ep->num != 0) || !_req)
++		return -EINVAL;
++
++	spin_lock_irqsave (&ep->dev->lock, flags);
++	stopped = ep->stopped;
++
++	/* quiesce dma while we patch the queue */
++	dmactl = 0;
++	ep->stopped = 1;
++	if (ep->dma) {
++		dmactl = readl (&ep->dma->dmactl);
++		/* WARNING erratum 0127 may kick in ... */
++		stop_dma (ep->dma);
++		scan_dma_completions (ep);
++	}
++
++	/* make sure it's still queued on this endpoint */
++	list_for_each_entry (req, &ep->queue, queue) {
++		if (&req->req == _req)
++			break;
++	}
++	if (&req->req != _req) {
++		spin_unlock_irqrestore (&ep->dev->lock, flags);
++		return -EINVAL;
++	}
++
++	/* queue head may be partially complete. */
++	if (ep->queue.next == &req->queue) {
++		if (ep->dma) {
++			DEBUG (ep->dev, "unlink (%s) dma\n", _ep->name);
++			_req->status = -ECONNRESET;
++			abort_dma (ep);
++			if (likely (ep->queue.next == &req->queue)) {
++				// NOTE: misreports single-transfer mode
++				req->td->dmacount = 0;	/* invalidate */
++				dma_done (ep, req,
++					readl (&ep->dma->dmacount),
++					-ECONNRESET);
++			}
++		} else {
++			DEBUG (ep->dev, "unlink (%s) pio\n", _ep->name);
++			done (ep, req, -ECONNRESET);
++		}
++		req = NULL;
++
++	/* patch up hardware chaining data */
++	} else if (ep->dma && use_dma_chaining) {
++		if (req->queue.prev == ep->queue.next) {
++			writel (le32_to_cpu (req->td->dmadesc),
++				&ep->dma->dmadesc);
++			if (req->td->dmacount & dma_done_ie)
++				writel (readl (&ep->dma->dmacount)
++						| dma_done_ie,
++					&ep->dma->dmacount);
++		} else {
++			struct net2280_request	*prev;
++
++			prev = list_entry (req->queue.prev,
++				struct net2280_request, queue);
++			prev->td->dmadesc = req->td->dmadesc;
++			if (req->td->dmacount & dma_done_ie)
++				prev->td->dmacount |= dma_done_ie;
++		}
++	}
++
++	if (req)
++		done (ep, req, -ECONNRESET);
++	ep->stopped = stopped;
++
++	if (ep->dma) {
++		/* turn off dma on inactive queues */
++		if (list_empty (&ep->queue))
++			stop_dma (ep->dma);
++		else if (!ep->stopped) {
++			/* resume current request, or start new one */
++			if (req)
++				writel (dmactl, &ep->dma->dmactl);
++			else
++				start_dma (ep, list_entry (ep->queue.next,
++					struct net2280_request, queue));
++		}
++	}
++
++	spin_unlock_irqrestore (&ep->dev->lock, flags);
++	return req ? 0 : -EOPNOTSUPP;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static int net2280_fifo_status (struct usb_ep *_ep);
++
++static int
++net2280_set_halt (struct usb_ep *_ep, int value)
++{
++	struct net2280_ep	*ep;
++	unsigned long		flags;
++	int			retval = 0;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || (!ep->desc && ep->num != 0))
++		return -EINVAL;
++	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return -ESHUTDOWN;
++	if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03)
++						== USB_ENDPOINT_XFER_ISOC)
++		return -EINVAL;
++
++	spin_lock_irqsave (&ep->dev->lock, flags);
++	if (!list_empty (&ep->queue))
++		retval = -EAGAIN;
++	else if (ep->is_in && value && net2280_fifo_status (_ep) != 0)
++		retval = -EAGAIN;
++	else {
++		VDEBUG (ep->dev, "%s %s halt\n", _ep->name,
++				value ? "set" : "clear");
++		/* set/clear, then synch memory views with the device */
++		if (value) {
++			if (ep->num == 0)
++				ep->dev->protocol_stall = 1;
++			else
++				set_halt (ep);
++		} else
++			clear_halt (ep);
++		(void) readl (&ep->regs->ep_rsp);
++	}
++	spin_unlock_irqrestore (&ep->dev->lock, flags);
++
++	return retval;
++}
++
++static int
++net2280_fifo_status (struct usb_ep *_ep)
++{
++	struct net2280_ep	*ep;
++	u32			avail;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || (!ep->desc && ep->num != 0))
++		return -ENODEV;
++	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return -ESHUTDOWN;
++
++	avail = readl (&ep->regs->ep_avail) & ((1 << 12) - 1);
++	if (avail > ep->fifo_size)
++		return -EOVERFLOW;
++	if (ep->is_in)
++		avail = ep->fifo_size - avail;
++	return avail;
++}
++
++static void
++net2280_fifo_flush (struct usb_ep *_ep)
++{
++	struct net2280_ep	*ep;
++
++	ep = container_of (_ep, struct net2280_ep, ep);
++	if (!_ep || (!ep->desc && ep->num != 0))
++		return;
++	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return;
++
++	writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat);
++	(void) readl (&ep->regs->ep_rsp);
++}
++
++static struct usb_ep_ops net2280_ep_ops = {
++	.enable		= net2280_enable,
++	.disable	= net2280_disable,
++
++	.alloc_request	= net2280_alloc_request,
++	.free_request	= net2280_free_request,
++
++	.alloc_buffer	= net2280_alloc_buffer,
++	.free_buffer	= net2280_free_buffer,
++
++	.queue		= net2280_queue,
++	.dequeue	= net2280_dequeue,
++
++	.set_halt	= net2280_set_halt,
++	.fifo_status	= net2280_fifo_status,
++	.fifo_flush	= net2280_fifo_flush,
++};
++
++/*-------------------------------------------------------------------------*/
++
++static int net2280_get_frame (struct usb_gadget *_gadget)
++{
++	struct net2280		*dev;
++	unsigned long		flags;
++	u16			retval;
++
++	if (!_gadget)
++		return -ENODEV;
++	dev = container_of (_gadget, struct net2280, gadget);
++	spin_lock_irqsave (&dev->lock, flags);
++	retval = get_idx_reg (dev->regs, REG_FRAME) & 0x03ff;
++	spin_unlock_irqrestore (&dev->lock, flags);
++	return retval;
++}
++
++static int net2280_wakeup (struct usb_gadget *_gadget)
++{
++	struct net2280		*dev;
++	u32			tmp;
++	unsigned long		flags;
++
++	if (!_gadget)
++		return 0;
++	dev = container_of (_gadget, struct net2280, gadget);
++
++	spin_lock_irqsave (&dev->lock, flags);
++	tmp = readl (&dev->usb->usbctl);
++	if (tmp & (1 << DEVICE_REMOTE_WAKEUP_ENABLE))
++		writel (1 << GENERATE_RESUME, &dev->usb->usbstat);
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	/* pci writes may still be posted */
++	return 0;
++}
++
++static int net2280_set_selfpowered (struct usb_gadget *_gadget, int value)
++{
++	struct net2280		*dev;
++	u32			tmp;
++	unsigned long		flags;
++
++	if (!_gadget)
++		return 0;
++	dev = container_of (_gadget, struct net2280, gadget);
++
++	spin_lock_irqsave (&dev->lock, flags);
++	tmp = readl (&dev->usb->usbctl);
++	if (value)
++		tmp |= (1 << SELF_POWERED_STATUS);
++	else
++		tmp &= ~(1 << SELF_POWERED_STATUS);
++	writel (tmp, &dev->usb->usbctl);
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	return 0;
++}
++
++static int net2280_pullup(struct usb_gadget *_gadget, int is_on)
++{
++	struct net2280  *dev;
++	u32             tmp;
++	unsigned long   flags;
++
++	if (!_gadget)
++		return -ENODEV;
++	dev = container_of (_gadget, struct net2280, gadget);
++
++	spin_lock_irqsave (&dev->lock, flags);
++	tmp = readl (&dev->usb->usbctl);
++	dev->softconnect = (is_on != 0);
++	if (is_on)
++		tmp |= (1 << USB_DETECT_ENABLE);
++	else
++		tmp &= ~(1 << USB_DETECT_ENABLE);
++	writel (tmp, &dev->usb->usbctl);
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	return 0;
++}
++
++static const struct usb_gadget_ops net2280_ops = {
++	.get_frame	= net2280_get_frame,
++	.wakeup		= net2280_wakeup,
++	.set_selfpowered = net2280_set_selfpowered,
++	.pullup		= net2280_pullup,
++};
++
++/*-------------------------------------------------------------------------*/
++
++#ifdef	USE_SYSFS_DEBUG_FILES
++
++/* "function" sysfs attribute */
++static ssize_t
++show_function (struct device *_dev, char *buf)
++{
++	struct net2280	*dev = dev_get_drvdata (_dev);
++
++	if (!dev->driver
++			|| !dev->driver->function
++			|| strlen (dev->driver->function) > PAGE_SIZE)
++		return 0;
++	return snprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function);
++}
++static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
++
++static ssize_t
++show_registers (struct device *_dev, char *buf)
++{
++	struct net2280		*dev;
++	char			*next;
++	unsigned		size, t;
++	unsigned long		flags;
++	int			i;
++	u32			t1, t2;
++	char			*s;
++
++	dev = dev_get_drvdata (_dev);
++	next = buf;
++	size = PAGE_SIZE;
++	spin_lock_irqsave (&dev->lock, flags);
++
++	if (dev->driver)
++		s = dev->driver->driver.name;
++	else
++		s = "(none)";
++
++	/* Main Control Registers */
++	t = snprintf (next, size, "%s version " DRIVER_VERSION
++			", chiprev %04x, dma %s\n\n"
++			"devinit %03x fifoctl %08x gadget '%s'\n"
++			"pci irqenb0 %02x irqenb1 %08x "
++			"irqstat0 %04x irqstat1 %08x\n",
++			driver_name, dev->chiprev,
++			use_dma
++				? (use_dma_chaining ? "chaining" : "enabled")
++				: "disabled",
++			readl (&dev->regs->devinit),
++			readl (&dev->regs->fifoctl),
++			s,
++			readl (&dev->regs->pciirqenb0),
++			readl (&dev->regs->pciirqenb1),
++			readl (&dev->regs->irqstat0),
++			readl (&dev->regs->irqstat1));
++	size -= t;
++	next += t;
++
++	/* USB Control Registers */
++	t1 = readl (&dev->usb->usbctl);
++	t2 = readl (&dev->usb->usbstat);
++	if (t1 & (1 << VBUS_PIN)) {
++		if (t2 & (1 << HIGH_SPEED))
++			s = "high speed";
++		else if (dev->gadget.speed == USB_SPEED_UNKNOWN)
++			s = "powered";
++		else
++			s = "full speed";
++		/* full speed bit (6) not working?? */
++	} else
++			s = "not attached";
++	t = snprintf (next, size,
++			"stdrsp %08x usbctl %08x usbstat %08x "
++				"addr 0x%02x (%s)\n",
++			readl (&dev->usb->stdrsp), t1, t2,
++			readl (&dev->usb->ouraddr), s);
++	size -= t;
++	next += t;
++
++	/* PCI Master Control Registers */
++
++	/* DMA Control Registers */
++
++	/* Configurable EP Control Registers */
++	for (i = 0; i < 7; i++) {
++		struct net2280_ep	*ep;
++
++		ep = &dev->ep [i];
++		if (i && !ep->desc)
++			continue;
++
++		t1 = readl (&ep->regs->ep_cfg);
++		t2 = readl (&ep->regs->ep_rsp) & 0xff;
++		t = snprintf (next, size,
++				"\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s"
++					"irqenb %02x\n",
++				ep->ep.name, t1, t2,
++				(t2 & (1 << CLEAR_NAK_OUT_PACKETS))
++					? "NAK " : "",
++				(t2 & (1 << CLEAR_EP_HIDE_STATUS_PHASE))
++					? "hide " : "",
++				(t2 & (1 << CLEAR_EP_FORCE_CRC_ERROR))
++					? "CRC " : "",
++				(t2 & (1 << CLEAR_INTERRUPT_MODE))
++					? "interrupt " : "",
++				(t2 & (1<<CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE))
++					? "status " : "",
++				(t2 & (1 << CLEAR_NAK_OUT_PACKETS_MODE))
++					? "NAKmode " : "",
++				(t2 & (1 << CLEAR_ENDPOINT_TOGGLE))
++					? "DATA1 " : "DATA0 ",
++				(t2 & (1 << CLEAR_ENDPOINT_HALT))
++					? "HALT " : "",
++				readl (&ep->regs->ep_irqenb));
++		size -= t;
++		next += t;
++
++		t = snprintf (next, size,
++				"\tstat %08x avail %04x "
++				"(ep%d%s-%s)%s\n",
++				readl (&ep->regs->ep_stat),
++				readl (&ep->regs->ep_avail),
++				t1 & 0x0f, DIR_STRING (t1),
++				type_string (t1 >> 8),
++				ep->stopped ? "*" : "");
++		size -= t;
++		next += t;
++
++		if (!ep->dma)
++			continue;
++
++		t = snprintf (next, size,
++				"  dma\tctl %08x stat %08x count %08x\n"
++				"\taddr %08x desc %08x\n",
++				readl (&ep->dma->dmactl),
++				readl (&ep->dma->dmastat),
++				readl (&ep->dma->dmacount),
++				readl (&ep->dma->dmaaddr),
++				readl (&ep->dma->dmadesc));
++		size -= t;
++		next += t;
++
++	}
++
++	/* Indexed Registers */
++		// none yet 
++
++	/* Statistics */
++	t = snprintf (next, size, "\nirqs:  ");
++	size -= t;
++	next += t;
++	for (i = 0; i < 7; i++) {
++		struct net2280_ep	*ep;
++
++		ep = &dev->ep [i];
++		if (i && !ep->irqs)
++			continue;
++		t = snprintf (next, size, " %s/%lu", ep->ep.name, ep->irqs);
++		size -= t;
++		next += t;
++
++	}
++	t = snprintf (next, size, "\n");
++	size -= t;
++	next += t;
++
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	return PAGE_SIZE - size;
++}
++static DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
++
++static ssize_t
++show_queues (struct device *_dev, char *buf)
++{
++	struct net2280		*dev;
++	char			*next;
++	unsigned		size;
++	unsigned long		flags;
++	int			i;
++
++	dev = dev_get_drvdata (_dev);
++	next = buf;
++	size = PAGE_SIZE;
++	spin_lock_irqsave (&dev->lock, flags);
++
++	for (i = 0; i < 7; i++) {
++		struct net2280_ep		*ep = &dev->ep [i];
++		struct net2280_request		*req;
++		int				t;
++
++		if (i != 0) {
++			const struct usb_endpoint_descriptor	*d;
++
++			d = ep->desc;
++			if (!d)
++				continue;
++			t = d->bEndpointAddress;
++			t = snprintf (next, size,
++				"\n%s (ep%d%s-%s) max %04x %s fifo %d\n",
++				ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK,
++				(t & USB_DIR_IN) ? "in" : "out",
++				({ char *val;
++				 switch (d->bmAttributes & 0x03) {
++				 case USB_ENDPOINT_XFER_BULK:
++				 	val = "bulk"; break;
++				 case USB_ENDPOINT_XFER_INT:
++				 	val = "intr"; break;
++				 default:
++				 	val = "iso"; break;
++				 }; val; }),
++				le16_to_cpu (d->wMaxPacketSize) & 0x1fff,
++				ep->dma ? "dma" : "pio", ep->fifo_size
++				);
++		} else /* ep0 should only have one transfer queued */
++			t = snprintf (next, size, "ep0 max 64 pio %s\n",
++					ep->is_in ? "in" : "out");
++		if (t <= 0 || t > size)
++			goto done;
++		size -= t;
++		next += t;
++
++		if (list_empty (&ep->queue)) {
++			t = snprintf (next, size, "\t(nothing queued)\n");
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++			continue;
++		}
++		list_for_each_entry (req, &ep->queue, queue) {
++			if (ep->dma && req->td_dma == readl (&ep->dma->dmadesc))
++				t = snprintf (next, size,
++					"\treq %p len %d/%d "
++					"buf %p (dmacount %08x)\n",
++					&req->req, req->req.actual,
++					req->req.length, req->req.buf,
++					readl (&ep->dma->dmacount));
++			else
++				t = snprintf (next, size,
++					"\treq %p len %d/%d buf %p\n",
++					&req->req, req->req.actual,
++					req->req.length, req->req.buf);
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++
++			if (ep->dma) {
++				struct net2280_dma	*td;
++
++				td = req->td;
++				t = snprintf (next, size, "\t    td %08x "
++					" count %08x buf %08x desc %08x\n",
++					req->td_dma, td->dmacount,
++					td->dmaaddr, td->dmadesc);
++				if (t <= 0 || t > size)
++					goto done;
++				size -= t;
++				next += t;
++			}
++		}
++	}
++
++done:
++	spin_unlock_irqrestore (&dev->lock, flags);
++	return PAGE_SIZE - size;
++}
++static DEVICE_ATTR (queues, S_IRUGO, show_queues, NULL);
++
++
++#else
++
++#define device_create_file(a,b)	do {} while (0)
++#define device_remove_file	device_create_file
++
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++/* another driver-specific mode might be a request type doing dma
++ * to/from another device fifo instead of to/from memory.
++ */
++
++static void set_fifo_mode (struct net2280 *dev, int mode)
++{
++	/* keeping high bits preserves BAR2 */
++	writel ((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl);
++
++	/* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */
++	INIT_LIST_HEAD (&dev->gadget.ep_list);
++	list_add_tail (&dev->ep [1].ep.ep_list, &dev->gadget.ep_list);
++	list_add_tail (&dev->ep [2].ep.ep_list, &dev->gadget.ep_list);
++	switch (mode) {
++	case 0:
++		list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list);
++		list_add_tail (&dev->ep [4].ep.ep_list, &dev->gadget.ep_list);
++		dev->ep [1].fifo_size = dev->ep [2].fifo_size = 1024;
++		break;
++	case 1:
++		dev->ep [1].fifo_size = dev->ep [2].fifo_size = 2048;
++		break;
++	case 2:
++		list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list);
++		dev->ep [1].fifo_size = 2048;
++		dev->ep [2].fifo_size = 1024;
++		break;
++	}
++	/* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */
++	list_add_tail (&dev->ep [5].ep.ep_list, &dev->gadget.ep_list);
++	list_add_tail (&dev->ep [6].ep.ep_list, &dev->gadget.ep_list);
++}
++
++/**
++ * net2280_set_fifo_mode - change allocation of fifo buffers
++ * @gadget: access to the net2280 device that will be updated
++ * @mode: 0 for default, four 1kB buffers (ep-a through ep-d);
++ * 	1 for two 2kB buffers (ep-a and ep-b only);
++ * 	2 for one 2kB buffer (ep-a) and two 1kB ones (ep-b, ep-c).
++ *
++ * returns zero on success, else negative errno.  when this succeeds,
++ * the contents of gadget->ep_list may have changed.
++ *
++ * you may only call this function when endpoints a-d are all disabled.
++ * use it whenever extra hardware buffering can help performance, such
++ * as before enabling "high bandwidth" interrupt endpoints that use
++ * maxpacket bigger than 512 (when double buffering would otherwise
++ * be unavailable).
++ */
++int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
++{
++	int			i;
++	struct net2280		*dev;
++	int			status = 0;
++	unsigned long		flags;
++
++	if (!gadget)
++		return -ENODEV;
++	dev = container_of (gadget, struct net2280, gadget);
++
++	spin_lock_irqsave (&dev->lock, flags);
++
++	for (i = 1; i <= 4; i++)
++		if (dev->ep [i].desc) {
++			status = -EINVAL;
++			break;
++		}
++	if (mode < 0 || mode > 2)
++		status = -EINVAL;
++	if (status == 0)
++		set_fifo_mode (dev, mode);
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	if (status == 0) {
++		if (mode == 1)
++			DEBUG (dev, "fifo:  ep-a 2K, ep-b 2K\n");
++		else if (mode == 2)
++			DEBUG (dev, "fifo:  ep-a 2K, ep-b 1K, ep-c 1K\n");
++		/* else all are 1K */
++	}
++	return status;
++}
++EXPORT_SYMBOL (net2280_set_fifo_mode);
++
++/*-------------------------------------------------------------------------*/
++
++/* keeping it simple:
++ * - one bus driver, initted first;
++ * - one function driver, initted second
++ *
++ * most of the work to support multiple net2280 controllers would
++ * be to associate this gadget driver (yes?) with all of them, or
++ * perhaps to bind specific drivers to specific devices.
++ */
++
++static struct net2280	*the_controller;
++
++static void usb_reset (struct net2280 *dev)
++{
++	u32	tmp;
++
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++	(void) readl (&dev->usb->usbctl);
++
++	net2280_led_init (dev);
++
++	/* disable automatic responses, and irqs */
++	writel (0, &dev->usb->stdrsp);
++	writel (0, &dev->regs->pciirqenb0);
++	writel (0, &dev->regs->pciirqenb1);
++
++	/* clear old dma and irq state */
++	for (tmp = 0; tmp < 4; tmp++) {
++		struct net2280_ep	*ep = &dev->ep [tmp + 1];
++
++		if (ep->dma)
++			abort_dma (ep);
++	}
++	writel (~0, &dev->regs->irqstat0),
++	writel (~(1 << SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1),
++
++	/* reset, and enable pci */
++	tmp = readl (&dev->regs->devinit)
++		| (1 << PCI_ENABLE)
++		| (1 << FIFO_SOFT_RESET)
++		| (1 << USB_SOFT_RESET)
++		| (1 << M8051_RESET);
++	writel (tmp, &dev->regs->devinit);
++
++	/* standard fifo and endpoint allocations */
++	set_fifo_mode (dev, (fifo_mode <= 2) ? fifo_mode : 0);
++}
++
++static void usb_reinit (struct net2280 *dev)
++{
++	u32	tmp;
++	int	init_dma;
++
++	/* use_dma changes are ignored till next device re-init */
++	init_dma = use_dma;
++
++	/* basic endpoint init */
++	for (tmp = 0; tmp < 7; tmp++) {
++		struct net2280_ep	*ep = &dev->ep [tmp];
++
++		ep->ep.name = ep_name [tmp];
++		ep->dev = dev;
++		ep->num = tmp;
++
++		if (tmp > 0 && tmp <= 4) {
++			ep->fifo_size = 1024;
++			if (init_dma)
++				ep->dma = &dev->dma [tmp - 1];
++		} else
++			ep->fifo_size = 64;
++		ep->regs = &dev->epregs [tmp];
++		ep_reset (dev->regs, ep);
++	}
++	dev->ep [0].ep.maxpacket = 64;
++	dev->ep [5].ep.maxpacket = 64;
++	dev->ep [6].ep.maxpacket = 64;
++
++	dev->gadget.ep0 = &dev->ep [0].ep;
++	dev->ep [0].stopped = 0;
++	INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
++
++	/* we want to prevent lowlevel/insecure access from the USB host,
++	 * but erratum 0119 means this enable bit is ignored
++	 */
++	for (tmp = 0; tmp < 5; tmp++)
++		writel (EP_DONTUSE, &dev->dep [tmp].dep_cfg);
++}
++
++static void ep0_start (struct net2280 *dev)
++{
++	writel (  (1 << CLEAR_EP_HIDE_STATUS_PHASE)
++		| (1 << CLEAR_NAK_OUT_PACKETS)
++		| (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
++		, &dev->epregs [0].ep_rsp);
++
++	/*
++	 * hardware optionally handles a bunch of standard requests
++	 * that the API hides from drivers anyway.  have it do so.
++	 * endpoint status/features are handled in software, to
++	 * help pass tests for some dubious behavior.
++	 */
++	writel (  (1 << SET_TEST_MODE)
++		| (1 << SET_ADDRESS)
++		| (1 << DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP)
++		| (1 << GET_DEVICE_STATUS)
++		| (1 << GET_INTERFACE_STATUS)
++		, &dev->usb->stdrsp);
++	writel (  (1 << USB_ROOT_PORT_WAKEUP_ENABLE)
++		| (1 << SELF_POWERED_USB_DEVICE)
++		/* erratum 0102 workaround */
++		| ((dev->chiprev == 0100) ? 0 : 1) << SUSPEND_IMMEDIATELY
++		| (1 << REMOTE_WAKEUP_SUPPORT)
++		| (dev->softconnect << USB_DETECT_ENABLE)
++		| (1 << SELF_POWERED_STATUS)
++		, &dev->usb->usbctl);
++
++	/* enable irqs so we can see ep0 and general operation  */
++	writel (  (1 << SETUP_PACKET_INTERRUPT_ENABLE)
++		| (1 << ENDPOINT_0_INTERRUPT_ENABLE)
++		, &dev->regs->pciirqenb0);
++	writel (  (1 << PCI_INTERRUPT_ENABLE)
++		| (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE)
++		| (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE)
++		| (1 << PCI_RETRY_ABORT_INTERRUPT_ENABLE)
++		| (1 << VBUS_INTERRUPT_ENABLE)
++		| (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE)
++		| (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE)
++		, &dev->regs->pciirqenb1);
++
++	/* don't leave any writes posted */
++	(void) readl (&dev->usb->usbctl);
++}
++
++/* when a driver is successfully registered, it will receive
++ * control requests including set_configuration(), which enables
++ * non-control requests.  then usb traffic follows until a
++ * disconnect is reported.  then a host may connect again, or
++ * the driver might get unbound.
++ */
++int usb_gadget_register_driver (struct usb_gadget_driver *driver)
++{
++	struct net2280		*dev = the_controller;
++	int			retval;
++	unsigned		i;
++
++	/* insist on high speed support from the driver, since
++	 * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE)
++	 * "must not be used in normal operation"
++	 */
++	if (!driver
++			|| driver->speed != USB_SPEED_HIGH
++			|| !driver->bind
++			|| !driver->unbind
++			|| !driver->setup)
++		return -EINVAL;
++	if (!dev)
++		return -ENODEV;
++	if (dev->driver)
++		return -EBUSY;
++
++	for (i = 0; i < 7; i++)
++		dev->ep [i].irqs = 0;
++
++	/* hook up the driver ... */
++	dev->softconnect = 1;
++	dev->driver = driver;
++	retval = driver->bind (&dev->gadget);
++	if (retval) {
++		DEBUG (dev, "bind to driver %s --> %d\n",
++				driver->driver.name, retval);
++		dev->driver = 0;
++		return retval;
++	}
++
++	/* ... then enable host detection and ep0; and we're ready
++	 * for set_configuration as well as eventual disconnect.
++	 */
++	net2280_led_active (dev, 1);
++	ep0_start (dev);
++
++	DEBUG (dev, "%s ready, usbctl %08x stdrsp %08x\n",
++			driver->driver.name,
++			readl (&dev->usb->usbctl),
++			readl (&dev->usb->stdrsp));
++
++	/* pci writes may still be posted */
++	return 0;
++}
++EXPORT_SYMBOL (usb_gadget_register_driver);
++
++static void
++stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver)
++{
++	int			i;
++
++	/* don't disconnect if it's not connected */
++	if (dev->gadget.speed == USB_SPEED_UNKNOWN)
++		driver = NULL;
++
++	/* stop hardware; prevent new request submissions;
++	 * and kill any outstanding requests.
++	 */
++	usb_reset (dev);
++	for (i = 0; i < 7; i++)
++		nuke (&dev->ep [i]);
++
++	/* report disconnect; the driver is already quiesced */
++	if (driver) {
++		spin_unlock (&dev->lock);
++		driver->disconnect (&dev->gadget);
++		spin_lock (&dev->lock);
++	}
++
++	usb_reinit (dev);
++}
++
++int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
++{
++	struct net2280	*dev = the_controller;
++	unsigned long	flags;
++
++	if (!dev)
++		return -ENODEV;
++	if (!driver || driver != dev->driver)
++		return -EINVAL;
++
++	spin_lock_irqsave (&dev->lock, flags);
++	stop_activity (dev, driver);
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	driver->unbind (&dev->gadget);
++	dev->driver = 0;
++
++	net2280_led_active (dev, 0);
++
++	DEBUG (dev, "unregistered driver '%s'\n", driver->driver.name);
++	return 0;
++}
++EXPORT_SYMBOL (usb_gadget_unregister_driver);
++
++
++/*-------------------------------------------------------------------------*/
++
++/* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq.
++ * also works for dma-capable endpoints, in pio mode or just
++ * to manually advance the queue after short OUT transfers.
++ */
++static void handle_ep_small (struct net2280_ep *ep)
++{
++	struct net2280_request	*req;
++	u32			t;
++	/* 0 error, 1 mid-data, 2 done */
++	int			mode = 1;
++
++	if (!list_empty (&ep->queue))
++		req = list_entry (ep->queue.next,
++			struct net2280_request, queue);
++	else
++		req = NULL;
++
++	/* ack all, and handle what we care about */
++	t = readl (&ep->regs->ep_stat);
++	ep->irqs++;
++#if 0
++	VDEBUG (ep->dev, "%s ack ep_stat %08x, req %p\n",
++			ep->ep.name, t, req ? &req->req : 0);
++#endif
++	writel (t & ~(1 << NAK_OUT_PACKETS), &ep->regs->ep_stat);
++
++	/* for ep0, monitor token irqs to catch data stage length errors
++	 * and to synchronize on status.
++	 *
++	 * also, to defer reporting of protocol stalls ... here's where
++	 * data or status first appears, handling stalls here should never
++	 * cause trouble on the host side..
++	 *
++	 * control requests could be slightly faster without token synch for
++	 * status, but status can jam up that way.
++	 */
++	if (unlikely (ep->num == 0)) {
++		if (ep->is_in) {
++			/* status; stop NAKing */
++			if (t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) {
++				if (ep->dev->protocol_stall) {
++					ep->stopped = 1;
++					set_halt (ep);
++				}
++				if (!req)
++					allow_status (ep);
++				mode = 2;
++			/* reply to extra IN data tokens with a zlp */
++			} else if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) {
++				if (ep->dev->protocol_stall) {
++					ep->stopped = 1;
++					set_halt (ep);
++					mode = 2;
++				} else if (!req && ep->stopped)
++					write_fifo (ep, NULL);
++			}
++		} else {
++			/* status; stop NAKing */
++			if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) {
++				if (ep->dev->protocol_stall) {
++					ep->stopped = 1;
++					set_halt (ep);
++				}
++				mode = 2;
++			/* an extra OUT token is an error */
++			} else if (((t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT))
++					&& req
++					&& req->req.actual == req->req.length)
++					|| !req) {
++				ep->dev->protocol_stall = 1;
++				set_halt (ep);
++				ep->stopped = 1;
++				if (req)
++					done (ep, req, -EOVERFLOW);
++				req = NULL;
++			}
++		}
++	}
++
++	if (unlikely (!req))
++		return;
++
++	/* manual DMA queue advance after short OUT */
++	if (likely (ep->dma != 0)) {
++		if (t & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) {
++			u32	count;
++			int	stopped = ep->stopped;
++
++			/* TRANSFERRED works around OUT_DONE erratum 0112.
++			 * we expect (N <= maxpacket) bytes; host wrote M.
++			 * iff (M < N) we won't ever see a DMA interrupt.
++			 */
++			ep->stopped = 1;
++			for (count = 0; ; t = readl (&ep->regs->ep_stat)) {
++
++				/* any preceding dma transfers must finish.
++				 * dma handles (M >= N), may empty the queue
++				 */
++				scan_dma_completions (ep);
++				if (unlikely (list_empty (&ep->queue)
++						|| ep->out_overflow)) {
++					req = NULL;
++					break;
++				}
++				req = list_entry (ep->queue.next,
++					struct net2280_request, queue);
++
++				/* here either (M < N), a "real" short rx;
++				 * or (M == N) and the queue didn't empty
++				 */
++				if (likely (t & (1 << FIFO_EMPTY))) {
++					count = readl (&ep->dma->dmacount);
++					count &= DMA_BYTE_COUNT_MASK;
++					if (readl (&ep->dma->dmadesc)
++							!= req->td_dma)
++						req = NULL;
++					break;
++				}
++				udelay(1);
++			}
++
++			/* stop DMA, leave ep NAKing */
++			writel ((1 << DMA_ABORT), &ep->dma->dmastat);
++			spin_stop_dma (ep->dma);
++
++			if (likely (req != 0)) {
++				req->td->dmacount = 0;
++				t = readl (&ep->regs->ep_avail);
++				dma_done (ep, req, count, t);
++			}
++
++			/* also flush to prevent erratum 0106 trouble */
++			if (unlikely (ep->out_overflow
++					|| (ep->dev->chiprev == 0x0100
++						&& ep->dev->gadget.speed
++							== USB_SPEED_FULL))) {
++				out_flush (ep);
++				ep->out_overflow = 0;
++			}
++
++			/* (re)start dma if needed, stop NAKing */
++			ep->stopped = stopped;
++			if (!list_empty (&ep->queue))
++				restart_dma (ep);
++		} else
++			DEBUG (ep->dev, "%s dma ep_stat %08x ??\n",
++					ep->ep.name, t);
++		return;
++
++	/* data packet(s) received (in the fifo, OUT) */
++	} else if (t & (1 << DATA_PACKET_RECEIVED_INTERRUPT)) {
++		if (read_fifo (ep, req) && ep->num != 0)
++			mode = 2;
++
++	/* data packet(s) transmitted (IN) */
++	} else if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) {
++		unsigned	len;
++
++		len = req->req.length - req->req.actual;
++		if (len > ep->ep.maxpacket)
++			len = ep->ep.maxpacket;
++		req->req.actual += len;
++
++		/* if we wrote it all, we're usually done */
++		if (req->req.actual == req->req.length) {
++			if (ep->num == 0) {
++				/* wait for control status */
++				if (mode != 2)
++					req = NULL;
++			} else if (!req->req.zero || len != ep->ep.maxpacket)
++				mode = 2;
++		}
++
++	/* there was nothing to do ...  */
++	} else if (mode == 1)
++		return;
++
++	/* done */
++	if (mode == 2) {
++		/* stream endpoints often resubmit/unlink in completion */
++		done (ep, req, 0);
++
++		/* maybe advance queue to next request */
++		if (ep->num == 0) {
++			/* NOTE:  net2280 could let gadget driver start the
++			 * status stage later. since not all controllers let
++			 * them control that, the api doesn't (yet) allow it.
++			 */
++			if (!ep->stopped)
++				allow_status (ep);
++			req = NULL;
++		} else {
++			if (!list_empty (&ep->queue) && !ep->stopped)
++				req = list_entry (ep->queue.next,
++					struct net2280_request, queue);
++			else
++				req = NULL;
++			if (req && !ep->is_in)
++				stop_out_naking (ep);
++		}
++	}
++
++	/* is there a buffer for the next packet?
++	 * for best streaming performance, make sure there is one.
++	 */
++	if (req && !ep->stopped) {
++
++		/* load IN fifo with next packet (may be zlp) */
++		if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))
++			write_fifo (ep, &req->req);
++	}
++}
++
++static struct net2280_ep *
++get_ep_by_addr (struct net2280 *dev, u16 wIndex)
++{
++	struct net2280_ep	*ep;
++
++	if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
++		return &dev->ep [0];
++	list_for_each_entry (ep, &dev->gadget.ep_list, ep.ep_list) {
++		u8	bEndpointAddress;
++
++		if (!ep->desc)
++			continue;
++		bEndpointAddress = ep->desc->bEndpointAddress;
++		if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
++			continue;
++		if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
++			return ep;
++	}
++	return NULL;
++}
++
++static void handle_stat0_irqs (struct net2280 *dev, u32 stat)
++{
++	struct net2280_ep	*ep;
++	u32			num, scratch;
++
++	/* most of these don't need individual acks */
++	stat &= ~(1 << INTA_ASSERTED);
++	if (!stat)
++		return;
++	// DEBUG (dev, "irqstat0 %04x\n", stat);
++
++	/* starting a control request? */
++	if (unlikely (stat & (1 << SETUP_PACKET_INTERRUPT))) {
++		union {
++			u32			raw [2];
++			struct usb_ctrlrequest	r;
++		} u;
++		int				tmp = 0;
++		struct net2280_request		*req;
++
++		if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
++			if (readl (&dev->usb->usbstat) & (1 << HIGH_SPEED))
++				dev->gadget.speed = USB_SPEED_HIGH;
++			else
++				dev->gadget.speed = USB_SPEED_FULL;
++			net2280_led_speed (dev, dev->gadget.speed);
++			DEBUG (dev, "%s speed\n",
++				(dev->gadget.speed == USB_SPEED_HIGH)
++					? "high" : "full");
++		}
++
++		ep = &dev->ep [0];
++		ep->irqs++;
++
++		/* make sure any leftover request state is cleared */
++		stat &= ~(1 << ENDPOINT_0_INTERRUPT);
++		while (!list_empty (&ep->queue)) {
++			req = list_entry (ep->queue.next,
++					struct net2280_request, queue);
++			done (ep, req, (req->req.actual == req->req.length)
++						? 0 : -EPROTO);
++		}
++		ep->stopped = 0;
++		dev->protocol_stall = 0;
++		writel (  (1 << TIMEOUT)
++			| (1 << USB_STALL_SENT)
++			| (1 << USB_IN_NAK_SENT)
++			| (1 << USB_IN_ACK_RCVD)
++			| (1 << USB_OUT_PING_NAK_SENT)
++			| (1 << USB_OUT_ACK_SENT)
++			| (1 << FIFO_OVERFLOW)
++			| (1 << FIFO_UNDERFLOW)
++			| (1 << SHORT_PACKET_OUT_DONE_INTERRUPT)
++			| (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)
++			| (1 << DATA_PACKET_RECEIVED_INTERRUPT)
++			| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
++			| (1 << DATA_OUT_PING_TOKEN_INTERRUPT)
++			| (1 << DATA_IN_TOKEN_INTERRUPT)
++			, &ep->regs->ep_stat);
++		u.raw [0] = readl (&dev->usb->setup0123);
++		u.raw [1] = readl (&dev->usb->setup4567);
++		
++		cpu_to_le32s (&u.raw [0]);
++		cpu_to_le32s (&u.raw [1]);
++
++		le16_to_cpus (&u.r.wValue);
++		le16_to_cpus (&u.r.wIndex);
++		le16_to_cpus (&u.r.wLength);
++
++		/* ack the irq */
++		writel (1 << SETUP_PACKET_INTERRUPT, &dev->regs->irqstat0);
++		stat ^= (1 << SETUP_PACKET_INTERRUPT);
++
++		/* watch control traffic at the token level, and force
++		 * synchronization before letting the status stage happen.
++		 * FIXME ignore tokens we'll NAK, until driver responds.
++		 * that'll mean a lot less irqs for some drivers.
++		 */
++		ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
++		if (ep->is_in) {
++			scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
++				| (1 << DATA_OUT_PING_TOKEN_INTERRUPT)
++				| (1 << DATA_IN_TOKEN_INTERRUPT);
++			stop_out_naking (ep);
++		} else
++			scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT)
++				| (1 << DATA_OUT_PING_TOKEN_INTERRUPT)
++				| (1 << DATA_IN_TOKEN_INTERRUPT);
++		writel (scratch, &dev->epregs [0].ep_irqenb);
++
++		/* we made the hardware handle most lowlevel requests;
++		 * everything else goes uplevel to the gadget code.
++		 */
++		switch (u.r.bRequest) {
++		case USB_REQ_GET_STATUS: {
++			struct net2280_ep	*e;
++			u16			status;
++
++			/* hw handles device and interface status */
++			if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
++				goto delegate;
++			if ((e = get_ep_by_addr (dev, u.r.wIndex)) == 0
++					|| u.r.wLength > 2)
++				goto do_stall;
++
++			if (readl (&e->regs->ep_rsp)
++					& (1 << SET_ENDPOINT_HALT))
++				status = __constant_cpu_to_le16 (1);
++			else
++				status = __constant_cpu_to_le16 (0);
++
++			/* don't bother with a request object! */
++			writel (0, &dev->epregs [0].ep_irqenb);
++			set_fifo_bytecount (ep, u.r.wLength);
++			writel (status, &dev->epregs [0].ep_data);
++			allow_status (ep);
++			VDEBUG (dev, "%s stat %02x\n", ep->ep.name, status);
++			goto next_endpoints;
++			}
++			break;
++		case USB_REQ_CLEAR_FEATURE: {
++			struct net2280_ep	*e;
++
++			/* hw handles device features */
++			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
++				goto delegate;
++			if (u.r.wValue != USB_ENDPOINT_HALT
++					|| u.r.wLength != 0)
++				goto do_stall;
++			if ((e = get_ep_by_addr (dev, u.r.wIndex)) == 0)
++				goto do_stall;
++			clear_halt (e);
++			allow_status (ep);
++			VDEBUG (dev, "%s clear halt\n", ep->ep.name);
++			goto next_endpoints;
++			}
++			break;
++		case USB_REQ_SET_FEATURE: {
++			struct net2280_ep	*e;
++
++			/* hw handles device features */
++			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
++				goto delegate;
++			if (u.r.wValue != USB_ENDPOINT_HALT
++					|| u.r.wLength != 0)
++				goto do_stall;
++			if ((e = get_ep_by_addr (dev, u.r.wIndex)) == 0)
++				goto do_stall;
++			set_halt (e);
++			allow_status (ep);
++			VDEBUG (dev, "%s set halt\n", ep->ep.name);
++			goto next_endpoints;
++			}
++			break;
++		default:
++delegate:
++			VDEBUG (dev, "setup %02x.%02x v%04x i%04x "
++				"ep_cfg %08x\n",
++				u.r.bRequestType, u.r.bRequest,
++				u.r.wValue, u.r.wIndex,
++				readl (&ep->regs->ep_cfg));
++			spin_unlock (&dev->lock);
++			tmp = dev->driver->setup (&dev->gadget, &u.r);
++			spin_lock (&dev->lock);
++		}
++
++		/* stall ep0 on error */
++		if (tmp < 0) {
++do_stall:
++			VDEBUG (dev, "req %02x.%02x protocol STALL; stat %d\n",
++					u.r.bRequestType, u.r.bRequest, tmp);
++			dev->protocol_stall = 1;
++		}
++
++		/* some in/out token irq should follow; maybe stall then.
++		 * driver must queue a request (even zlp) or halt ep0
++		 * before the host times out.
++		 */
++	}
++
++next_endpoints:
++	/* endpoint data irq ? */
++	scratch = stat & 0x7f;
++	stat &= ~0x7f;
++	for (num = 0; scratch; num++) {
++		u32		t;
++
++		/* do this endpoint's FIFO and queue need tending? */
++		t = 1 << num;
++		if ((scratch & t) == 0)
++			continue;
++		scratch ^= t;
++
++		ep = &dev->ep [num];
++		handle_ep_small (ep);
++	}
++
++	if (stat)
++		DEBUG (dev, "unhandled irqstat0 %08x\n", stat);
++}
++
++#define DMA_INTERRUPTS ( \
++		  (1 << DMA_D_INTERRUPT) \
++		| (1 << DMA_C_INTERRUPT) \
++		| (1 << DMA_B_INTERRUPT) \
++		| (1 << DMA_A_INTERRUPT))
++#define	PCI_ERROR_INTERRUPTS ( \
++		  (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT) \
++		| (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT) \
++		| (1 << PCI_RETRY_ABORT_INTERRUPT))
++
++static void handle_stat1_irqs (struct net2280 *dev, u32 stat)
++{
++	struct net2280_ep	*ep;
++	u32			tmp, num, scratch;
++
++	/* after disconnect there's nothing else to do! */
++	tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT);
++	if (stat & tmp) {
++		writel (tmp, &dev->regs->irqstat1);
++		if (((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) != 0
++			|| (readl (&dev->usb->usbctl) & (1 << VBUS_PIN)) == 0
++			) && dev->gadget.speed != USB_SPEED_UNKNOWN) {
++			DEBUG (dev, "disconnect %s\n",
++					dev->driver->driver.name);
++			stop_activity (dev, dev->driver);
++			ep0_start (dev);
++			return;
++		}
++		stat &= ~tmp;
++
++		/* vBUS can bounce ... one of many reasons to ignore the
++		 * notion of hotplug events on bus connect/disconnect!
++		 */
++		if (!stat)
++			return;
++	}
++
++	/* NOTE: chip stays in PCI D0 state for now, but it could
++	 * enter D1 to save more power
++	 */
++	tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT);
++	if (stat & tmp) {
++		writel (tmp, &dev->regs->irqstat1);
++		if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) {
++			if (dev->driver->suspend)
++				dev->driver->suspend (&dev->gadget);
++			/* we use SUSPEND_IMMEDIATELY */
++			stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT);
++		} else {
++			if (dev->driver->resume)
++				dev->driver->resume (&dev->gadget);
++			/* at high speed, note erratum 0133 */
++		}
++		stat &= ~tmp;
++	}
++
++	/* clear any other status/irqs */
++	if (stat)
++		writel (stat, &dev->regs->irqstat1);
++
++	/* some status we can just ignore */
++	stat &= ~((1 << CONTROL_STATUS_INTERRUPT)
++			| (1 << SUSPEND_REQUEST_INTERRUPT)
++			| (1 << RESUME_INTERRUPT)
++			| (1 << SOF_INTERRUPT));
++	if (!stat)
++		return;
++	// DEBUG (dev, "irqstat1 %08x\n", stat);
++
++	/* DMA status, for ep-{a,b,c,d} */
++	scratch = stat & DMA_INTERRUPTS;
++	stat &= ~DMA_INTERRUPTS;
++	scratch >>= 9;
++	for (num = 0; scratch; num++) {
++		struct net2280_dma_regs	*dma;
++
++		tmp = 1 << num;
++		if ((tmp & scratch) == 0)
++			continue;
++		scratch ^= tmp;
++
++		ep = &dev->ep [num + 1];
++		dma = ep->dma;
++
++		if (!dma)
++			continue;
++
++		/* clear ep's dma status */
++		tmp = readl (&dma->dmastat);
++		writel (tmp, &dma->dmastat);
++
++		/* chaining should stop on abort, short OUT from fifo,
++		 * or (stat0 codepath) short OUT transfer.
++		 */
++		if (!use_dma_chaining) {
++			if ((tmp & (1 << DMA_TRANSACTION_DONE_INTERRUPT))
++					== 0) {
++				DEBUG (ep->dev, "%s no xact done? %08x\n",
++					ep->ep.name, tmp);
++				continue;
++			}
++			stop_dma (ep->dma);
++		}
++
++		/* OUT transfers terminate when the data from the
++		 * host is in our memory.  Process whatever's done.
++		 * On this path, we know transfer's last packet wasn't
++		 * less than req->length. NAK_OUT_PACKETS may be set,
++		 * or the FIFO may already be holding new packets.
++		 *
++		 * IN transfers can linger in the FIFO for a very
++		 * long time ... we ignore that for now, accounting
++		 * precisely (like PIO does) needs per-packet irqs
++		 */
++		scan_dma_completions (ep);
++
++		/* disable dma on inactive queues; else maybe restart */
++		if (list_empty (&ep->queue)) {
++			if (use_dma_chaining)
++				stop_dma (ep->dma);
++		} else {
++			tmp = readl (&dma->dmactl);
++			if (!use_dma_chaining
++					|| (tmp & (1 << DMA_ENABLE)) == 0)
++				restart_dma (ep);
++			else if (ep->is_in && use_dma_chaining) {
++				struct net2280_request	*req;
++				u32			dmacount;
++
++				/* the descriptor at the head of the chain
++				 * may still have VALID_BIT clear; that's
++				 * used to trigger changing DMA_FIFO_VALIDATE
++				 * (affects automagic zlp writes).
++				 */
++				req = list_entry (ep->queue.next,
++						struct net2280_request, queue);
++				dmacount = req->td->dmacount;
++				dmacount &= __constant_cpu_to_le32 (
++						(1 << VALID_BIT)
++						| DMA_BYTE_COUNT_MASK);
++				if (dmacount && (dmacount & valid_bit) == 0)
++					restart_dma (ep);
++			}
++		}
++		ep->irqs++;
++	}
++
++	/* NOTE:  there are other PCI errors we might usefully notice.
++	 * if they appear very often, here's where to try recovering.
++	 */
++	if (stat & PCI_ERROR_INTERRUPTS) {
++		ERROR (dev, "pci dma error; stat %08x\n", stat);
++		stat &= ~PCI_ERROR_INTERRUPTS;
++		/* these are fatal errors, but "maybe" they won't
++		 * happen again ...
++		 */
++		stop_activity (dev, dev->driver);
++		ep0_start (dev);
++		stat = 0;
++	}
++
++	if (stat)
++		DEBUG (dev, "unhandled irqstat1 %08x\n", stat);
++}
++
++static irqreturn_t net2280_irq (int irq, void *_dev, struct pt_regs * r)
++{
++	struct net2280		*dev = _dev;
++
++	spin_lock (&dev->lock);
++
++	/* handle disconnect, dma, and more */
++	handle_stat1_irqs (dev, readl (&dev->regs->irqstat1));
++
++	/* control requests and PIO */
++	handle_stat0_irqs (dev, readl (&dev->regs->irqstat0));
++
++	spin_unlock (&dev->lock);
++
++	return IRQ_HANDLED;
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* tear down the binding between this driver and the pci device */
++
++static void net2280_remove (struct pci_dev *pdev)
++{
++	struct net2280		*dev = pci_get_drvdata (pdev);
++
++	/* start with the driver above us */
++	if (dev->driver) {
++		/* should have been done already by driver model core */
++		WARN (dev, "pci remove, driver '%s' is still registered\n",
++				dev->driver->driver.name);
++		usb_gadget_unregister_driver (dev->driver);
++	}
++
++	/* then clean up the resources we allocated during probe() */
++	net2280_led_shutdown (dev);
++	if (dev->requests) {
++		int		i;
++		for (i = 1; i < 5; i++) {
++			if (!dev->ep [i].dummy)
++				continue;
++			pci_pool_free (dev->requests, dev->ep [i].dummy,
++					dev->ep [i].td_dma);
++		}
++		pci_pool_destroy (dev->requests);
++	}
++	if (dev->got_irq)
++		free_irq (pdev->irq, dev);
++	if (dev->regs)
++		iounmap (dev->regs);
++	if (dev->region)
++		release_mem_region (pci_resource_start (pdev, 0),
++				pci_resource_len (pdev, 0));
++	if (dev->enabled)
++		pci_disable_device (pdev);
++	pci_set_drvdata (pdev, 0);
++
++	INFO (dev, "unbind from pci %s\n", pdev->slot_name);
++
++	kfree (dev);
++	the_controller = 0;
++}
++
++/* wrap this driver around the specified device, but
++ * don't respond over USB until a gadget driver binds to us.
++ */
++
++static int net2280_probe (struct pci_dev *pdev, const struct pci_device_id *id)
++{
++	struct net2280		*dev;
++	unsigned long		resource, len;
++	void			*base = NULL;
++	int			retval, i;
++	char			buf [8], *bufp;
++
++	/* if you want to support more than one controller in a system,
++	 * usb_gadget_driver_{register,unregister}() must change.
++	 */
++	if (the_controller) {
++		WARN (the_controller, "ignoring %s\n", pdev->slot_name);
++		return -EBUSY;
++	}
++
++	/* alloc, and start init */
++	dev = kmalloc (sizeof *dev, SLAB_KERNEL);
++	if (dev == NULL){
++		retval = -ENOMEM;
++		goto done;
++	}
++
++	memset (dev, 0, sizeof *dev);
++	spin_lock_init (&dev->lock);
++	dev->pdev = pdev;
++	dev->gadget.ops = &net2280_ops;
++	dev->gadget.is_dualspeed = 1;
++
++	dev->gadget.dev.bus_id = pdev->slot_name;
++	dev->gadget.name = driver_name;
++
++	/* now all the pci goodies ... */
++	if (pci_enable_device (pdev) < 0) {
++   	        retval = -ENODEV;
++		goto done;
++	}
++	dev->enabled = 1;
++
++	/* BAR 0 holds all the registers
++	 * BAR 1 is 8051 memory; unused here (note erratum 0103)
++	 * BAR 2 is fifo memory; unused here
++	 */
++	resource = pci_resource_start (pdev, 0);
++	len = pci_resource_len (pdev, 0);
++	if (!request_mem_region (resource, len, driver_name)) {
++		DEBUG (dev, "controller already in use\n");
++		retval = -EBUSY;
++		goto done;
++	}
++	dev->region = 1;
++
++	base = ioremap_nocache (resource, len);
++	if (base == NULL) {
++		DEBUG (dev, "can't map memory\n");
++		retval = -EFAULT;
++		goto done;
++	}
++	dev->regs = (struct net2280_regs *) base;
++	dev->usb = (struct net2280_usb_regs *) (base + 0x0080);
++	dev->pci = (struct net2280_pci_regs *) (base + 0x0100);
++	dev->dma = (struct net2280_dma_regs *) (base + 0x0180);
++	dev->dep = (struct net2280_dep_regs *) (base + 0x0200);
++	dev->epregs = (struct net2280_ep_regs *) (base + 0x0300);
++
++	/* put into initial config, link up all endpoints */
++	writel (0, &dev->usb->usbctl);
++	usb_reset (dev);
++	usb_reinit (dev);
++
++	/* irq setup after old hardware is cleaned up */
++	if (!pdev->irq) {
++		ERROR (dev, "No IRQ.  Check PCI setup!\n");
++		retval = -ENODEV;
++		goto done;
++	}
++#ifndef __sparc__
++	snprintf (buf, sizeof buf, "%d", pdev->irq);
++	bufp = buf;
++#else
++	bufp = __irq_itoa(pdev->irq);
++#endif
++	if (request_irq (pdev->irq, net2280_irq, SA_SHIRQ, driver_name, dev)
++			!= 0) {
++		ERROR (dev, "request interrupt %s failed\n", bufp);
++		retval = -EBUSY;
++		goto done;
++	}
++	dev->got_irq = 1;
++
++	/* DMA setup */
++	dev->requests = pci_pool_create ("requests", pdev,
++		sizeof (struct net2280_dma),
++		0 /* no alignment requirements */,
++		0 /* or page-crossing issues */,
++		SLAB_KERNEL /* 2.4 only */ );
++	if (!dev->requests) {
++		DEBUG (dev, "can't get request pool\n");
++		retval = -ENOMEM;
++		goto done;
++	}
++	for (i = 1; i < 5; i++) {
++		struct net2280_dma	*td;
++
++		td = pci_pool_alloc (dev->requests, GFP_KERNEL,
++				&dev->ep [i].td_dma);
++		if (!td) {
++			DEBUG (dev, "can't get dummy %d\n", i);
++			retval = -ENOMEM;
++			goto done;
++		}
++		td->dmacount = 0;	/* not VALID */
++		td->dmaaddr = __constant_cpu_to_le32 (DMA_ADDR_INVALID);
++		td->dmadesc = td->dmaaddr;
++		dev->ep [i].dummy = td;
++	}
++
++	/* enable lower-overhead pci memory bursts during DMA */
++	writel ( (1 << DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE)
++			// 256 write retries may not be enough...
++			// | (1 << PCI_RETRY_ABORT_ENABLE)
++			| (1 << DMA_READ_MULTIPLE_ENABLE)
++			| (1 << DMA_READ_LINE_ENABLE)
++			, &dev->pci->pcimstctl);
++	/* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */
++	pci_set_master (pdev);
++	pci_set_mwi (pdev);
++
++	/* ... also flushes any posted pci writes */
++	dev->chiprev = get_idx_reg (dev->regs, REG_CHIPREV) & 0xffff;
++
++	/* done */
++	pci_set_drvdata (pdev, dev);
++	INFO (dev, "%s\n", driver_desc);
++	INFO (dev, "irq %s, pci mem %p, chip rev %04x\n",
++			bufp, base, dev->chiprev);
++	INFO (dev, "version: " DRIVER_VERSION "; dma %s\n",
++			use_dma
++				? (use_dma_chaining ? "chaining" : "enabled")
++				: "disabled");
++	the_controller = dev;
++
++	return 0;
++
++done:
++	if (dev)
++		net2280_remove (pdev);
++	return retval;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static struct pci_device_id pci_ids [] = { {
++	.class = 	((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
++	.class_mask = 	~0,
++	.vendor =	0x17cc,
++	.device =	0x2280,
++	.subvendor =	PCI_ANY_ID,
++	.subdevice =	PCI_ANY_ID,
++
++}, { /* end: all zeroes */ }
++};
++MODULE_DEVICE_TABLE (pci, pci_ids);
++
++/* pci driver glue; this is a "new style" PCI driver module */
++static struct pci_driver net2280_pci_driver = {
++	.name =		(char *) driver_name,
++	.id_table =	pci_ids,
++
++	.probe =	net2280_probe,
++	.remove =	net2280_remove,
++
++	/* FIXME add power management support */
++};
++
++MODULE_DESCRIPTION (DRIVER_DESC);
++MODULE_AUTHOR ("David Brownell");
++MODULE_LICENSE ("GPL");
++
++static int __init init (void)
++{
++	if (!use_dma)
++		use_dma_chaining = 0;
++	return pci_module_init (&net2280_pci_driver);
++}
++module_init (init);
++
++static void __exit cleanup (void)
++{
++	pci_unregister_driver (&net2280_pci_driver);
++}
++module_exit (cleanup);
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/net2280.h kernel/drivers/usb/gadget/net2280.h
+--- /tmp/kernel/drivers/usb/gadget/net2280.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/net2280.h	2005-04-22 17:53:19.483531538 +0200
+@@ -0,0 +1,756 @@
++/*
++ * NetChip 2280 high/full speed USB device controller.
++ * Unlike many such controllers, this one talks PCI.
++ */
++
++/*
++ * Copyright (C) 2002 NetChip Technology, Inc. (http://www.netchip.com)
++ * Copyright (C) 2003 David Brownell
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++/*-------------------------------------------------------------------------*/
++
++/* NET2280 MEMORY MAPPED REGISTERS
++ *
++ * The register layout came from the chip documentation, and the bit
++ * number definitions were extracted from chip specification.
++ *
++ * Use the shift operator ('<<') to build bit masks, with readl/writel
++ * to access the registers through PCI.
++ */
++
++/* main registers, BAR0 + 0x0000 */
++struct net2280_regs {
++	// offset 0x0000
++	u32		devinit;
++#define     LOCAL_CLOCK_FREQUENCY                               8
++#define     FORCE_PCI_RESET                                     7
++#define     PCI_ID                                              6
++#define     PCI_ENABLE                                          5
++#define     FIFO_SOFT_RESET                                     4
++#define     CFG_SOFT_RESET                                      3
++#define     PCI_SOFT_RESET                                      2
++#define     USB_SOFT_RESET                                      1
++#define     M8051_RESET                                         0
++	u32		eectl;
++#define     EEPROM_ADDRESS_WIDTH                                23
++#define     EEPROM_CHIP_SELECT_ACTIVE                           22
++#define     EEPROM_PRESENT                                      21
++#define     EEPROM_VALID                                        20
++#define     EEPROM_BUSY                                         19
++#define     EEPROM_CHIP_SELECT_ENABLE                           18
++#define     EEPROM_BYTE_READ_START                              17
++#define     EEPROM_BYTE_WRITE_START                             16
++#define     EEPROM_READ_DATA                                    8
++#define     EEPROM_WRITE_DATA                                   0
++	u32		eeclkfreq;
++	u32		_unused0;
++	// offset 0x0010
++
++	u32		pciirqenb0;		/* interrupt PCI master ... */
++#define     SETUP_PACKET_INTERRUPT_ENABLE                       7
++#define     ENDPOINT_F_INTERRUPT_ENABLE                         6
++#define     ENDPOINT_E_INTERRUPT_ENABLE                         5
++#define     ENDPOINT_D_INTERRUPT_ENABLE                         4
++#define     ENDPOINT_C_INTERRUPT_ENABLE                         3
++#define     ENDPOINT_B_INTERRUPT_ENABLE                         2
++#define     ENDPOINT_A_INTERRUPT_ENABLE                         1
++#define     ENDPOINT_0_INTERRUPT_ENABLE                         0
++	u32		pciirqenb1;
++#define     PCI_INTERRUPT_ENABLE                                31
++#define     POWER_STATE_CHANGE_INTERRUPT_ENABLE                 27
++#define     PCI_ARBITER_TIMEOUT_INTERRUPT_ENABLE                26
++#define     PCI_PARITY_ERROR_INTERRUPT_ENABLE                   25
++#define     PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE          20
++#define     PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE          19
++#define     PCI_TARGET_ABORT_ASSERTED_INTERRUPT_ENABLE          18
++#define     PCI_RETRY_ABORT_INTERRUPT_ENABLE                    17
++#define     PCI_MASTER_CYCLE_DONE_INTERRUPT_ENABLE              16
++#define     GPIO_INTERRUPT_ENABLE                               13
++#define     DMA_D_INTERRUPT_ENABLE                              12
++#define     DMA_C_INTERRUPT_ENABLE                              11
++#define     DMA_B_INTERRUPT_ENABLE                              10
++#define     DMA_A_INTERRUPT_ENABLE                              9
++#define     EEPROM_DONE_INTERRUPT_ENABLE                        8
++#define     VBUS_INTERRUPT_ENABLE                               7
++#define     CONTROL_STATUS_INTERRUPT_ENABLE                     6
++#define     ROOT_PORT_RESET_INTERRUPT_ENABLE                    4
++#define     SUSPEND_REQUEST_INTERRUPT_ENABLE                    3
++#define     SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE             2
++#define     RESUME_INTERRUPT_ENABLE                             1
++#define     SOF_INTERRUPT_ENABLE                                0
++	u32		cpu_irqenb0;		/* ... or onboard 8051 */
++#define     SETUP_PACKET_INTERRUPT_ENABLE                       7
++#define     ENDPOINT_F_INTERRUPT_ENABLE                         6
++#define     ENDPOINT_E_INTERRUPT_ENABLE                         5
++#define     ENDPOINT_D_INTERRUPT_ENABLE                         4
++#define     ENDPOINT_C_INTERRUPT_ENABLE                         3
++#define     ENDPOINT_B_INTERRUPT_ENABLE                         2
++#define     ENDPOINT_A_INTERRUPT_ENABLE                         1
++#define     ENDPOINT_0_INTERRUPT_ENABLE                         0
++	u32		cpu_irqenb1;
++#define     CPU_INTERRUPT_ENABLE                                31
++#define     POWER_STATE_CHANGE_INTERRUPT_ENABLE                 27
++#define     PCI_ARBITER_TIMEOUT_INTERRUPT_ENABLE                26
++#define     PCI_PARITY_ERROR_INTERRUPT_ENABLE                   25
++#define     PCI_INTA_INTERRUPT_ENABLE                           24
++#define     PCI_PME_INTERRUPT_ENABLE                            23
++#define     PCI_SERR_INTERRUPT_ENABLE                           22
++#define     PCI_PERR_INTERRUPT_ENABLE                           21
++#define     PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE          20
++#define     PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE          19
++#define     PCI_RETRY_ABORT_INTERRUPT_ENABLE                    17
++#define     PCI_MASTER_CYCLE_DONE_INTERRUPT_ENABLE              16
++#define     GPIO_INTERRUPT_ENABLE                               13
++#define     DMA_D_INTERRUPT_ENABLE                              12
++#define     DMA_C_INTERRUPT_ENABLE                              11
++#define     DMA_B_INTERRUPT_ENABLE                              10
++#define     DMA_A_INTERRUPT_ENABLE                              9
++#define     EEPROM_DONE_INTERRUPT_ENABLE                        8
++#define     VBUS_INTERRUPT_ENABLE                               7
++#define     CONTROL_STATUS_INTERRUPT_ENABLE                     6
++#define     ROOT_PORT_RESET_INTERRUPT_ENABLE                    4
++#define     SUSPEND_REQUEST_INTERRUPT_ENABLE                    3
++#define     SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE             2
++#define     RESUME_INTERRUPT_ENABLE                             1
++#define     SOF_INTERRUPT_ENABLE                                0
++
++	// offset 0x0020
++	u32		_unused1;
++	u32		usbirqenb1;
++#define     USB_INTERRUPT_ENABLE                                31
++#define     POWER_STATE_CHANGE_INTERRUPT_ENABLE                 27
++#define     PCI_ARBITER_TIMEOUT_INTERRUPT_ENABLE                26
++#define     PCI_PARITY_ERROR_INTERRUPT_ENABLE                   25
++#define     PCI_INTA_INTERRUPT_ENABLE                           24
++#define     PCI_PME_INTERRUPT_ENABLE                            23
++#define     PCI_SERR_INTERRUPT_ENABLE                           22
++#define     PCI_PERR_INTERRUPT_ENABLE                           21
++#define     PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE          20
++#define     PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE          19
++#define     PCI_RETRY_ABORT_INTERRUPT_ENABLE                    17
++#define     PCI_MASTER_CYCLE_DONE_INTERRUPT_ENABLE              16
++#define     GPIO_INTERRUPT_ENABLE                               13
++#define     DMA_D_INTERRUPT_ENABLE                              12
++#define     DMA_C_INTERRUPT_ENABLE                              11
++#define     DMA_B_INTERRUPT_ENABLE                              10
++#define     DMA_A_INTERRUPT_ENABLE                              9
++#define     EEPROM_DONE_INTERRUPT_ENABLE                        8
++#define     VBUS_INTERRUPT_ENABLE                               7
++#define     CONTROL_STATUS_INTERRUPT_ENABLE                     6
++#define     ROOT_PORT_RESET_INTERRUPT_ENABLE                    4
++#define     SUSPEND_REQUEST_INTERRUPT_ENABLE                    3
++#define     SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE             2
++#define     RESUME_INTERRUPT_ENABLE                             1
++#define     SOF_INTERRUPT_ENABLE                                0
++	u32		irqstat0;
++#define     INTA_ASSERTED                                       12
++#define     SETUP_PACKET_INTERRUPT                              7
++#define     ENDPOINT_F_INTERRUPT                                6
++#define     ENDPOINT_E_INTERRUPT                                5
++#define     ENDPOINT_D_INTERRUPT                                4
++#define     ENDPOINT_C_INTERRUPT                                3
++#define     ENDPOINT_B_INTERRUPT                                2
++#define     ENDPOINT_A_INTERRUPT                                1
++#define     ENDPOINT_0_INTERRUPT                                0
++	u32		irqstat1;
++#define     POWER_STATE_CHANGE_INTERRUPT                        27
++#define     PCI_ARBITER_TIMEOUT_INTERRUPT                       26
++#define     PCI_PARITY_ERROR_INTERRUPT                          25
++#define     PCI_INTA_INTERRUPT                                  24
++#define     PCI_PME_INTERRUPT                                   23
++#define     PCI_SERR_INTERRUPT                                  22
++#define     PCI_PERR_INTERRUPT                                  21
++#define     PCI_MASTER_ABORT_RECEIVED_INTERRUPT                 20
++#define     PCI_TARGET_ABORT_RECEIVED_INTERRUPT                 19
++#define     PCI_RETRY_ABORT_INTERRUPT                           17
++#define     PCI_MASTER_CYCLE_DONE_INTERRUPT                     16
++#define     GPIO_INTERRUPT                                      13
++#define     DMA_D_INTERRUPT                                     12
++#define     DMA_C_INTERRUPT                                     11
++#define     DMA_B_INTERRUPT                                     10
++#define     DMA_A_INTERRUPT                                     9
++#define     EEPROM_DONE_INTERRUPT                               8
++#define     VBUS_INTERRUPT                                      7
++#define     CONTROL_STATUS_INTERRUPT                            6
++#define     ROOT_PORT_RESET_INTERRUPT                           4
++#define     SUSPEND_REQUEST_INTERRUPT                           3
++#define     SUSPEND_REQUEST_CHANGE_INTERRUPT                    2
++#define     RESUME_INTERRUPT                                    1
++#define     SOF_INTERRUPT                                       0
++	// offset 0x0030
++	u32		idxaddr;
++	u32		idxdata;
++	u32		fifoctl;
++#define     PCI_BASE2_RANGE                                     16
++#define     IGNORE_FIFO_AVAILABILITY                            3
++#define     PCI_BASE2_SELECT                                    2
++#define     FIFO_CONFIGURATION_SELECT                           0
++	u32		_unused2;
++	// offset 0x0040
++	u32		memaddr;
++#define     START                                               28
++#define     DIRECTION                                           27
++#define     FIFO_DIAGNOSTIC_SELECT                              24
++#define     MEMORY_ADDRESS                                      0
++	u32		memdata0;
++	u32		memdata1;
++	u32		_unused3;
++	// offset 0x0050
++	u32		gpioctl;
++#define     GPIO3_LED_SELECT                                    12
++#define     GPIO3_INTERRUPT_ENABLE                              11
++#define     GPIO2_INTERRUPT_ENABLE                              10
++#define     GPIO1_INTERRUPT_ENABLE                              9
++#define     GPIO0_INTERRUPT_ENABLE                              8
++#define     GPIO3_OUTPUT_ENABLE                                 7
++#define     GPIO2_OUTPUT_ENABLE                                 6
++#define     GPIO1_OUTPUT_ENABLE                                 5
++#define     GPIO0_OUTPUT_ENABLE                                 4
++#define     GPIO3_DATA                                          3
++#define     GPIO2_DATA                                          2
++#define     GPIO1_DATA                                          1
++#define     GPIO0_DATA                                          0
++	u32		gpiostat;
++#define     GPIO3_INTERRUPT                                     3
++#define     GPIO2_INTERRUPT                                     2
++#define     GPIO1_INTERRUPT                                     1
++#define     GPIO0_INTERRUPT                                     0
++} __attribute__ ((packed));
++
++/* usb control, BAR0 + 0x0080 */
++struct net2280_usb_regs {
++	// offset 0x0080
++	u32		stdrsp;
++#define     STALL_UNSUPPORTED_REQUESTS                          31
++#define     SET_TEST_MODE                                       16
++#define     GET_OTHER_SPEED_CONFIGURATION                       15
++#define     GET_DEVICE_QUALIFIER                                14
++#define     SET_ADDRESS                                         13
++#define     ENDPOINT_SET_CLEAR_HALT                             12
++#define     DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP               11
++#define     GET_STRING_DESCRIPTOR_2                             10
++#define     GET_STRING_DESCRIPTOR_1                             9
++#define     GET_STRING_DESCRIPTOR_0                             8
++#define     GET_SET_INTERFACE                                   6
++#define     GET_SET_CONFIGURATION                               5
++#define     GET_CONFIGURATION_DESCRIPTOR                        4
++#define     GET_DEVICE_DESCRIPTOR                               3
++#define     GET_ENDPOINT_STATUS                                 2
++#define     GET_INTERFACE_STATUS                                1
++#define     GET_DEVICE_STATUS                                   0
++	u32		prodvendid;
++#define     PRODUCT_ID                                          16
++#define     VENDOR_ID                                           0
++	u32		relnum;
++	u32		usbctl;
++#define     SERIAL_NUMBER_INDEX                                 16
++#define     PRODUCT_ID_STRING_ENABLE                            13
++#define     VENDOR_ID_STRING_ENABLE                             12
++#define     USB_ROOT_PORT_WAKEUP_ENABLE                         11
++#define     VBUS_PIN                                            10
++#define     TIMED_DISCONNECT                                    9
++#define     SUSPEND_IMMEDIATELY                                 7
++#define     SELF_POWERED_USB_DEVICE                             6
++#define     REMOTE_WAKEUP_SUPPORT                               5
++#define     PME_POLARITY                                        4
++#define     USB_DETECT_ENABLE                                   3
++#define     PME_WAKEUP_ENABLE                                   2
++#define     DEVICE_REMOTE_WAKEUP_ENABLE                         1
++#define     SELF_POWERED_STATUS                                 0
++	// offset 0x0090
++	u32		usbstat;
++#define     HIGH_SPEED                                          7
++#define     FULL_SPEED                                          6
++#define     GENERATE_RESUME                                     5
++#define     GENERATE_DEVICE_REMOTE_WAKEUP                       4
++	u32		xcvrdiag;
++#define     FORCE_HIGH_SPEED_MODE                               31
++#define     FORCE_FULL_SPEED_MODE                               30
++#define     USB_TEST_MODE                                       24
++#define     LINE_STATE                                          16
++#define     TRANSCEIVER_OPERATION_MODE                          2
++#define     TRANSCEIVER_SELECT                                  1
++#define     TERMINATION_SELECT                                  0
++	u32		setup0123;
++	u32		setup4567;
++	// offset 0x0090
++	u32		_unused0;
++	u32		ouraddr;
++#define     FORCE_IMMEDIATE                                     7
++#define     OUR_USB_ADDRESS                                     0
++	u32		ourconfig;
++} __attribute__ ((packed));
++
++/* pci control, BAR0 + 0x0100 */
++struct net2280_pci_regs {
++	// offset 0x0100
++	u32		 pcimstctl;
++#define     PCI_ARBITER_PARK_SELECT                             13
++#define     PCI_MULTI LEVEL_ARBITER                             12
++#define     PCI_RETRY_ABORT_ENABLE                              11
++#define     DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE              10
++#define     DMA_READ_MULTIPLE_ENABLE                            9
++#define     DMA_READ_LINE_ENABLE                                8
++#define     PCI_MASTER_COMMAND_SELECT                           6
++#define         MEM_READ_OR_WRITE                                   0
++#define         IO_READ_OR_WRITE                                    1
++#define         CFG_READ_OR_WRITE                                   2
++#define     PCI_MASTER_START                                    5
++#define     PCI_MASTER_READ_WRITE                               4
++#define         PCI_MASTER_WRITE                                    0
++#define         PCI_MASTER_READ                                     1
++#define     PCI_MASTER_BYTE_WRITE_ENABLES                       0
++	u32		 pcimstaddr;
++	u32		 pcimstdata;
++	u32		 pcimststat;
++#define     PCI_ARBITER_CLEAR                                   2
++#define     PCI_EXTERNAL_ARBITER                                1
++#define     PCI_HOST_MODE                                       0
++} __attribute__ ((packed));
++
++/* dma control, BAR0 + 0x0180 ... array of four structs like this,
++ * for channels 0..3.  see also struct net2280_dma:  descriptor
++ * that can be loaded into some of these registers.
++ */
++struct net2280_dma_regs {	/* [11.7] */
++	// offset 0x0180, 0x01a0, 0x01c0, 0x01e0, 
++	u32		dmactl;
++#define     DMA_SCATTER_GATHER_DONE_INTERRUPT_ENABLE            25
++#define     DMA_CLEAR_COUNT_ENABLE                              21
++#define     DESCRIPTOR_POLLING_RATE                             19
++#define         POLL_CONTINUOUS                                     0
++#define         POLL_1_USEC                                         1
++#define         POLL_100_USEC                                       2
++#define         POLL_1_MSEC                                         3
++#define     DMA_VALID_BIT_POLLING_ENABLE                        18
++#define     DMA_VALID_BIT_ENABLE                                17
++#define     DMA_SCATTER_GATHER_ENABLE                           16
++#define     DMA_OUT_AUTO_START_ENABLE                           4
++#define     DMA_PREEMPT_ENABLE                                  3
++#define     DMA_FIFO_VALIDATE                                   2
++#define     DMA_ENABLE                                          1
++#define     DMA_ADDRESS_HOLD                                    0
++	u32		dmastat;
++#define     DMA_SCATTER_GATHER_DONE_INTERRUPT                   25
++#define     DMA_TRANSACTION_DONE_INTERRUPT                      24
++#define     DMA_ABORT                                           1
++#define     DMA_START                                           0
++	u32		_unused0 [2];
++	// offset 0x0190, 0x01b0, 0x01d0, 0x01f0, 
++	u32		dmacount;
++#define     VALID_BIT                                           31
++#define     DMA_DIRECTION                                       30
++#define     DMA_DONE_INTERRUPT_ENABLE                           29
++#define     END_OF_CHAIN                                        28
++#define         DMA_BYTE_COUNT_MASK                                 ((1<<24)-1)
++#define     DMA_BYTE_COUNT                                      0
++	u32		dmaaddr;
++	u32		dmadesc;
++	u32		_unused1;
++} __attribute__ ((packed));
++
++/* dedicated endpoint registers, BAR0 + 0x0200 */
++
++struct net2280_dep_regs {	/* [11.8] */
++	// offset 0x0200, 0x0210, 0x220, 0x230, 0x240
++	u32		dep_cfg;
++	// offset 0x0204, 0x0214, 0x224, 0x234, 0x244
++	u32		dep_rsp;
++	u32		_unused [2];
++} __attribute__ ((packed));
++
++/* configurable endpoint registers, BAR0 + 0x0300 ... array of seven structs
++ * like this, for ep0 then the configurable endpoints A..F
++ * ep0 reserved for control; E and F have only 64 bytes of fifo
++ */
++struct net2280_ep_regs {	/* [11.9] */
++	// offset 0x0300, 0x0320, 0x0340, 0x0360, 0x0380, 0x03a0, 0x03c0
++	u32		ep_cfg;
++#define     ENDPOINT_BYTE_COUNT                                 16
++#define     ENDPOINT_ENABLE                                     10
++#define     ENDPOINT_TYPE                                       8
++#define     ENDPOINT_DIRECTION                                  7
++#define     ENDPOINT_NUMBER                                     0
++	u32		ep_rsp;
++#define     SET_NAK_OUT_PACKETS                                 15
++#define     SET_EP_HIDE_STATUS_PHASE                            14
++#define     SET_EP_FORCE_CRC_ERROR                              13
++#define     SET_INTERRUPT_MODE                                  12
++#define     SET_CONTROL_STATUS_PHASE_HANDSHAKE                  11
++#define     SET_NAK_OUT_PACKETS_MODE                            10
++#define     SET_ENDPOINT_TOGGLE                                 9
++#define     SET_ENDPOINT_HALT                                   8
++#define     CLEAR_NAK_OUT_PACKETS                               7
++#define     CLEAR_EP_HIDE_STATUS_PHASE                          6
++#define     CLEAR_EP_FORCE_CRC_ERROR                            5
++#define     CLEAR_INTERRUPT_MODE                                4
++#define     CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE                3
++#define     CLEAR_NAK_OUT_PACKETS_MODE                          2
++#define     CLEAR_ENDPOINT_TOGGLE                               1
++#define     CLEAR_ENDPOINT_HALT                                 0
++	u32		ep_irqenb;
++#define     SHORT_PACKET_OUT_DONE_INTERRUPT_ENABLE              6
++#define     SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE           5
++#define     DATA_PACKET_RECEIVED_INTERRUPT_ENABLE               3
++#define     DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE            2
++#define     DATA_OUT_PING_TOKEN_INTERRUPT_ENABLE                1
++#define     DATA_IN_TOKEN_INTERRUPT_ENABLE                      0
++	u32		ep_stat;
++#define     FIFO_VALID_COUNT                                    24
++#define     HIGH_BANDWIDTH_OUT_TRANSACTION_PID                  22
++#define     TIMEOUT                                             21
++#define     USB_STALL_SENT                                      20
++#define     USB_IN_NAK_SENT                                     19
++#define     USB_IN_ACK_RCVD                                     18
++#define     USB_OUT_PING_NAK_SENT                               17
++#define     USB_OUT_ACK_SENT                                    16
++#define     FIFO_OVERFLOW                                       13
++#define     FIFO_UNDERFLOW                                      12
++#define     FIFO_FULL                                           11
++#define     FIFO_EMPTY                                          10
++#define     FIFO_FLUSH                                          9
++#define     SHORT_PACKET_OUT_DONE_INTERRUPT                     6
++#define     SHORT_PACKET_TRANSFERRED_INTERRUPT                  5
++#define     NAK_OUT_PACKETS                                     4
++#define     DATA_PACKET_RECEIVED_INTERRUPT                      3
++#define     DATA_PACKET_TRANSMITTED_INTERRUPT                   2
++#define     DATA_OUT_PING_TOKEN_INTERRUPT                       1
++#define     DATA_IN_TOKEN_INTERRUPT                             0
++	// offset 0x0310, 0x0330, 0x0350, 0x0370, 0x0390, 0x03b0, 0x03d0
++	u32		ep_avail;
++	u32		ep_data;
++	u32		_unused0 [2];
++} __attribute__ ((packed));
++
++/*-------------------------------------------------------------------------*/
++
++#ifdef	__KERNEL__
++
++/* indexed registers [11.10] are accessed indirectly
++ * caller must own the device lock.
++ */
++
++static inline u32
++get_idx_reg (struct net2280_regs *regs, u32 index)
++{
++	writel (index, &regs->idxaddr);
++	/* NOTE:  synchs device/cpu memory views */
++	return readl (&regs->idxdata);
++}
++
++static inline void
++set_idx_reg (struct net2280_regs *regs, u32 index, u32 value)
++{
++	writel (index, &regs->idxaddr);
++	writel (value, &regs->idxdata);
++	/* posted, may not be visible yet */
++}
++
++#endif	/* __KERNEL__ */
++
++
++#define REG_DIAG		0x0
++#define     RETRY_COUNTER                                       16
++#define     FORCE_PCI_SERR                                      11
++#define     FORCE_PCI_INTERRUPT                                 10
++#define     FORCE_USB_INTERRUPT                                 9
++#define     FORCE_CPU_INTERRUPT                                 8
++#define     ILLEGAL_BYTE_ENABLES                                5
++#define     FAST_TIMES                                          4
++#define     FORCE_RECEIVE_ERROR                                 2
++#define     FORCE_TRANSMIT_CRC_ERROR                            0
++#define REG_FRAME		0x02	/* from last sof */
++#define REG_CHIPREV		0x03	/* in bcd */
++#define	REG_HS_NAK_RATE		0x0a	/* NAK per N uframes */
++
++#define	CHIPREV_1	0x0100
++#define	CHIPREV_1A	0x0110
++
++#ifdef	__KERNEL__
++
++/* ep a-f highspeed and fullspeed maxpacket, addresses
++ * computed from ep->num
++ */
++#define REG_EP_MAXPKT(dev,num) (((num) + 1) * 0x10 + \
++		(((dev)->gadget.speed == USB_SPEED_HIGH) ? 0 : 1))
++
++/*-------------------------------------------------------------------------*/
++
++/* [8.3] for scatter/gather i/o
++ * use struct net2280_dma_regs bitfields
++ */
++struct net2280_dma {
++	u32		dmacount;
++	u32		dmaaddr;		/* the buffer */
++	u32		dmadesc;		/* next dma descriptor */
++	u32		_reserved;
++} __attribute__ ((aligned (16)));
++
++/*-------------------------------------------------------------------------*/
++
++/* DRIVER DATA STRUCTURES and UTILITIES */
++
++struct net2280_ep {
++	struct usb_ep				ep;
++	struct net2280_ep_regs			*regs;
++	struct net2280_dma_regs			*dma;
++	struct net2280_dma			*dummy;
++	dma_addr_t				td_dma;	/* of dummy */
++	struct net2280				*dev;
++	unsigned long				irqs;
++
++	/* analogous to a host-side qh */
++	struct list_head			queue;
++	const struct usb_endpoint_descriptor	*desc;
++	unsigned				num : 8,
++						fifo_size : 12,
++						in_fifo_validate : 1,
++						out_overflow : 1,
++						stopped : 1,
++						is_in : 1,
++						is_iso : 1;
++};
++
++static inline void allow_status (struct net2280_ep *ep)
++{
++	/* ep0 only */
++	writel (  (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
++		| (1 << CLEAR_NAK_OUT_PACKETS)
++		| (1 << CLEAR_NAK_OUT_PACKETS_MODE)
++		, &ep->regs->ep_rsp);
++	ep->stopped = 1;
++}
++
++/* count (<= 4) bytes in the next fifo write will be valid */
++static inline void set_fifo_bytecount (struct net2280_ep *ep, unsigned count)
++{
++	writeb (count, 2 + (u8 *) &ep->regs->ep_cfg);
++}
++
++struct net2280_request {
++	struct usb_request		req;
++	struct net2280_dma		*td;
++	dma_addr_t			td_dma;
++	struct list_head		queue;
++	unsigned			mapped : 1,
++					valid : 1;
++};
++
++struct net2280 {
++	/* each pci device provides one gadget, several endpoints */
++	struct usb_gadget		gadget;
++	spinlock_t			lock;
++	struct net2280_ep		ep [7];
++	struct usb_gadget_driver 	*driver;
++	unsigned			enabled : 1,
++					protocol_stall : 1,
++					softconnect : 1,
++					got_irq : 1,
++					region : 1;
++	u16				chiprev;
++
++	/* pci state used to access those endpoints */
++	struct pci_dev			*pdev;
++	struct net2280_regs		*regs;
++	struct net2280_usb_regs		*usb;
++	struct net2280_pci_regs		*pci;
++	struct net2280_dma_regs		*dma;
++	struct net2280_dep_regs		*dep;
++	struct net2280_ep_regs		*epregs;
++
++	struct pci_pool			*requests;
++	// statistics...
++};
++
++static inline void set_halt (struct net2280_ep *ep)
++{
++	/* ep0 and bulk/intr endpoints */
++	writel (  (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
++		    /* set NAK_OUT for erratum 0114 */
++		| ((ep->dev->chiprev == CHIPREV_1) << SET_NAK_OUT_PACKETS)
++		| (1 << SET_ENDPOINT_HALT)
++		, &ep->regs->ep_rsp);
++}
++
++static inline void clear_halt (struct net2280_ep *ep)
++{
++	/* ep0 and bulk/intr endpoints */
++	writel (  (1 << CLEAR_ENDPOINT_HALT)
++		| (1 << CLEAR_ENDPOINT_TOGGLE)
++		    /* unless the gadget driver left a short packet in the
++		     * fifo, this reverses the erratum 0114 workaround.
++		     */
++		| ((ep->dev->chiprev == CHIPREV_1) << CLEAR_NAK_OUT_PACKETS)
++		, &ep->regs->ep_rsp);
++}
++
++#ifdef USE_RDK_LEDS
++
++static inline void net2280_led_init (struct net2280 *dev)
++{
++	/* LED3 (green) is on during USB activity. note erratum 0113. */
++	writel ((1 << GPIO3_LED_SELECT)
++		| (1 << GPIO3_OUTPUT_ENABLE)
++		| (1 << GPIO2_OUTPUT_ENABLE)
++		| (1 << GPIO1_OUTPUT_ENABLE)
++		| (1 << GPIO0_OUTPUT_ENABLE)
++		, &dev->regs->gpioctl);
++}
++
++/* indicate speed with bi-color LED 0/1 */
++static inline
++void net2280_led_speed (struct net2280 *dev, enum usb_device_speed speed)
++{
++	u32	val = readl (&dev->regs->gpioctl);
++	switch (speed) {
++	case USB_SPEED_HIGH:		/* green */
++		val &= ~(1 << GPIO0_DATA);
++		val |= (1 << GPIO1_DATA);
++		break;
++	case USB_SPEED_FULL:		/* red */
++		val &= ~(1 << GPIO1_DATA);
++		val |= (1 << GPIO0_DATA);
++		break;
++	default:			/* (off/black) */
++		val &= ~((1 << GPIO1_DATA) | (1 << GPIO0_DATA));
++		break;
++	}
++	writel (val, &dev->regs->gpioctl);
++}
++
++/* indicate power with LED 2 */
++static inline void net2280_led_active (struct net2280 *dev, int is_active)
++{
++	u32	val = readl (&dev->regs->gpioctl);
++
++	// FIXME this LED never seems to turn on.
++	if (is_active)
++		val |= GPIO2_DATA;
++	else
++		val &= ~GPIO2_DATA;
++	writel (val, &dev->regs->gpioctl);
++}
++static inline void net2280_led_shutdown (struct net2280 *dev)
++{
++	/* turn off all four GPIO*_DATA bits */
++	writel (readl (&dev->regs->gpioctl) & ~0x0f,
++			&dev->regs->gpioctl);
++}
++
++#else
++
++#define net2280_led_init(dev)		do { } while (0)
++#define net2280_led_speed(dev, speed)	do { } while (0)
++#define net2280_led_shutdown(dev)	do { } while (0)
++
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++#define xprintk(dev,level,fmt,args...) \
++	printk(level "%s %s: " fmt , driver_name , \
++			dev->pdev->slot_name , ## args)
++
++#ifdef DEBUG
++#undef DEBUG
++#define DEBUG(dev,fmt,args...) \
++	xprintk(dev , KERN_DEBUG , fmt , ## args)
++#else
++#define DEBUG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* DEBUG */
++
++#ifdef VERBOSE
++#define VDEBUG DEBUG
++#else
++#define VDEBUG(dev,fmt,args...) \
++	do { } while (0)
++#endif	/* VERBOSE */
++
++#define ERROR(dev,fmt,args...) \
++	xprintk(dev , KERN_ERR , fmt , ## args)
++#define WARN(dev,fmt,args...) \
++	xprintk(dev , KERN_WARNING , fmt , ## args)
++#define INFO(dev,fmt,args...) \
++	xprintk(dev , KERN_INFO , fmt , ## args)
++
++/*-------------------------------------------------------------------------*/
++
++static inline void start_out_naking (struct net2280_ep *ep)
++{
++	/* NOTE:  hardware races lurk here, and PING protocol issues */
++	writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
++	/* synch with device */
++	readl (&ep->regs->ep_rsp);
++}
++
++#ifdef DEBUG
++static inline void assert_out_naking (struct net2280_ep *ep, const char *where)
++{
++	u32	tmp = readl (&ep->regs->ep_stat);
++
++	if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) {
++		DEBUG (ep->dev, "%s %s %08x !NAK\n",
++				ep->ep.name, where, tmp);
++		writel ((1 << SET_NAK_OUT_PACKETS),
++			&ep->regs->ep_rsp);
++	}
++}
++#define ASSERT_OUT_NAKING(ep) assert_out_naking(ep,__FUNCTION__)
++#else
++#define ASSERT_OUT_NAKING(ep) do {} while (0)
++#endif
++
++static inline void stop_out_naking (struct net2280_ep *ep)
++{
++	u32	tmp;
++
++	tmp = readl (&ep->regs->ep_stat);
++	if ((tmp & (1 << NAK_OUT_PACKETS)) != 0)
++		writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* 2.5 and 2.4.older portability changes ... */
++
++#ifndef container_of
++#define	container_of	list_entry
++#endif
++
++#ifndef likely
++#define likely(x) (x)
++#define unlikely(x) (x)
++#endif
++
++#ifndef BUG_ON
++#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
++#endif
++
++#ifndef WARN_ON
++#define	WARN_ON(x)	do { } while (0)
++#endif
++
++#ifndef	IRQ_NONE
++typedef void irqreturn_t;
++#define IRQ_NONE
++#define IRQ_HANDLED
++#define IRQ_RETVAL(x)
++#endif
++
++#endif	/* __KERNEL__ */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/pxa2xx_udc.c kernel/drivers/usb/gadget/pxa2xx_udc.c
+--- /tmp/kernel/drivers/usb/gadget/pxa2xx_udc.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/pxa2xx_udc.c	2005-04-22 17:53:19.492530073 +0200
+@@ -0,0 +1,2486 @@
++/*
++ * linux/drivers/usb/gadget/pxa2xx_udc.c
++ * Intel PXA2xx and IXP4xx on-chip full speed USB device controllers
++ *
++ * Copyright (C) 2002 Intrinsyc, Inc. (Frank Becker)
++ * Copyright (C) 2003 Robert Schwebel, Pengutronix
++ * Copyright (C) 2003 Benedikt Spranger, Pengutronix
++ * Copyright (C) 2003 David Brownell
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ *
++ */
++
++#define	DEBUG	1
++// #define	VERBOSE	DBG_VERBOSE
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/ioport.h>
++#include <linux/types.h>
++#include <linux/version.h>
++#include <linux/errno.h>
++#include <linux/delay.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++#include <linux/proc_fs.h>
++#include <linux/mm.h>
++// #include <linux/device.h>
++
++#include <asm/byteorder.h>
++#include <asm/dma.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/unaligned.h>
++#include <asm/proc/cache.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++
++/*
++ * This driver handles the USB Device Controller (UDC) in Intel's PXA 2xx
++ * series processors.  The UDC for the IXP 4xx series is very similar.
++ * There are fifteen endpoints, in addition to ep0.
++ *
++ * Such controller drivers work with a gadget driver.  The gadget driver
++ * returns descriptors, implements configuration and data protocols used
++ * by the host to interact with this device, and allocates endpoints to
++ * the different protocol interfaces.  The controller driver virtualizes
++ * usb hardware so that the gadget drivers will be more portable.
++ * 
++ * This UDC hardware wants to implement a bit too much USB protocol, so
++ * it constrains the sorts of USB configuration change events that work.
++ * The errata for these chips are misleading; some "fixed" bugs from
++ * pxa250 a0/a1 b0/b1/b2 sure act like they're still there.
++ */
++
++/* NOTE:  the 2.6 driver is probably the most current version */
++#define	DRIVER_VERSION	"5-Jan-2004"
++#define	DRIVER_DESC	"PXA 2xx USB Device Controller driver"
++
++static const char driver_name [] = "pxa2xx_udc";
++
++static const char ep0name [] = "ep0";
++
++
++// #define	USE_DMA
++// #define	USE_OUT_DMA
++// #define	DISABLE_TEST_MODE
++
++#ifdef CONFIG_PROC_FS
++#define	UDC_PROC_FILE
++#endif
++
++#ifdef CONFIG_ARCH_IXP425
++#undef USE_DMA
++
++/* cpu-specific register addresses are compiled in to this code */
++#ifdef CONFIG_ARCH_PXA
++#error "Can't configure both IXP and PXA"
++#endif
++
++#endif
++
++#ifdef CONFIG_EMBEDDED
++/* few strings, and little code to use them */
++#undef	DEBUG
++#undef	UDC_PROC_FILE
++#endif
++
++
++#include "pxa2xx_udc.h"
++
++#ifdef	USE_DMA
++static int use_dma = 1;
++MODULE_PARM (use_dma, "i");
++MODULE_PARM_DESC (use_dma, "true to use dma");
++
++static void dma_nodesc_handler (int dmach, void *_ep, struct pt_regs *r);
++static void kick_dma(struct pxa2xx_ep *ep, struct pxa2xx_request *req);
++
++#ifdef USE_OUT_DMA
++#define	DMASTR " (dma support)"
++#else
++#define	DMASTR " (dma in)"
++#endif
++
++#else	/* !USE_DMA */
++#define	DMASTR " (pio only)"
++#undef	USE_OUT_DMA
++#endif
++
++#ifdef	CONFIG_USB_PXA2XX_SMALL
++#define SIZE_STR	" (small)"
++#else
++#define SIZE_STR	""
++#endif
++
++#ifdef DISABLE_TEST_MODE
++/* (mode == 0) == no undocumented chip tweaks
++ * (mode & 1)  == double buffer bulk IN
++ * (mode & 2)  == double buffer bulk OUT
++ * ... so mode = 3 (or 7, 15, etc) does it for both
++ */
++static ushort fifo_mode = 0;
++MODULE_PARM (fifo_mode, "h");
++MODULE_PARM_DESC (fifo_mode, "pxa2xx udc fifo mode");
++#endif
++
++/* ---------------------------------------------------------------------------
++ * 	endpoint related parts of the api to the usb controller hardware,
++ *	used by gadget driver; and the inner talker-to-hardware core.
++ * ---------------------------------------------------------------------------
++ */
++
++static void pxa2xx_ep_fifo_flush (struct usb_ep *ep);
++static void nuke (struct pxa2xx_ep *, int status);
++
++static void pio_irq_enable(int bEndpointAddress)
++{
++        bEndpointAddress &= 0xf;
++        if (bEndpointAddress < 8)
++                UICR0 &= ~(1 << bEndpointAddress);
++        else {
++                bEndpointAddress -= 8;
++                UICR1 &= ~(1 << bEndpointAddress);
++	}
++}
++
++static void pio_irq_disable(int bEndpointAddress)
++{
++        bEndpointAddress &= 0xf;
++        if (bEndpointAddress < 8)
++                UICR0 |= 1 << bEndpointAddress;
++        else {
++                bEndpointAddress -= 8;
++                UICR1 |= 1 << bEndpointAddress;
++        }
++}
++
++/* The UDCCR reg contains mask and interrupt status bits,
++ * so using '|=' isn't safe as it may ack an interrupt.
++ */
++#define UDCCR_MASK_BITS         (UDCCR_REM | UDCCR_SRM | UDCCR_UDE)
++
++static inline void udc_set_mask_UDCCR(int mask)
++{
++	UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS);
++}
++
++static inline void udc_clear_mask_UDCCR(int mask)
++{
++	UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS);
++}
++
++static inline void udc_ack_int_UDCCR(int mask)
++{
++	/* udccr contains the bits we dont want to change */
++	__u32 udccr = UDCCR & UDCCR_MASK_BITS;
++
++	UDCCR = udccr | (mask & ~UDCCR_MASK_BITS);
++}
++
++/*
++ * endpoint enable/disable
++ *
++ * we need to verify the descriptors used to enable endpoints.  since pxa2xx
++ * endpoint configurations are fixed, and are pretty much always enabled,
++ * there's not a lot to manage here.
++ *
++ * because pxa2xx can't selectively initialize bulk (or interrupt) endpoints,
++ * (resetting endpoint halt and toggle), SET_INTERFACE is unusable except
++ * for a single interface (with only the default altsetting) and for gadget
++ * drivers that don't halt endpoints (not reset by set_interface).  that also
++ * means that if you use ISO, you must violate the USB spec rule that all
++ * iso endpoints must be in non-default altsettings.
++ */
++static int pxa2xx_ep_enable (struct usb_ep *_ep,
++		const struct usb_endpoint_descriptor *desc)
++{
++	struct pxa2xx_ep        *ep;
++	struct pxa2xx_udc       *dev;
++
++	ep = container_of (_ep, struct pxa2xx_ep, ep);
++	if (!_ep || !desc || ep->desc || _ep->name == ep0name
++			|| desc->bDescriptorType != USB_DT_ENDPOINT
++			|| ep->bEndpointAddress != desc->bEndpointAddress
++			|| ep->fifo_size < le16_to_cpu
++						(desc->wMaxPacketSize)) {
++		DMSG("%s, bad ep or descriptor\n", __FUNCTION__);
++		return -EINVAL;
++	}
++
++	/* xfer types must match, except that interrupt ~= bulk */
++	if (ep->bmAttributes != desc->bmAttributes
++			&& ep->bmAttributes != USB_ENDPOINT_XFER_BULK
++			&& desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
++		DMSG("%s, %s type mismatch\n", __FUNCTION__, _ep->name);
++		return -EINVAL;
++	}
++
++	/* hardware _could_ do smaller, but driver doesn't */
++	if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
++				&& le16_to_cpu (desc->wMaxPacketSize)
++						!= BULK_FIFO_SIZE)
++			|| !desc->wMaxPacketSize) {
++		DMSG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
++		return -ERANGE;
++	}
++
++	dev = ep->dev;
++	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
++		DMSG("%s, bogus device state\n", __FUNCTION__);
++		return -ESHUTDOWN;
++	}
++
++	ep->desc = desc;
++	ep->dma = -1;
++	ep->stopped = 0;
++	ep->pio_irqs = ep->dma_irqs = 0;
++	ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize);
++
++	/* flush fifo (mostly for OUT buffers) */
++	pxa2xx_ep_fifo_flush (_ep);
++
++	/* ... reset halt state too, if we could ... */
++
++#ifdef	USE_DMA
++	/* for (some) bulk and ISO endpoints, try to get a DMA channel and
++	 * bind it to the endpoint.  otherwise use PIO. 
++	 */
++	switch (ep->bmAttributes) {
++	case USB_ENDPOINT_XFER_ISOC:
++		if (le16_to_cpu(desc->wMaxPacketSize) % 32)
++			break;
++		// fall through
++	case USB_ENDPOINT_XFER_BULK:
++		if (!use_dma || !ep->reg_drcmr)
++			break;
++		/* no bulk-out dma yet (pointless w/o descriptors) */
++		if ((ep->bmAttributes == USB_ENDPOINT_XFER_BULK)
++				&& (ep->bEndpointAddress & USB_DIR_IN) == 0) {
++			DMSG("%s dma-out NYI\n", _ep->name);
++			break;
++		}
++		ep->dma = pxa_request_dma ((char *)_ep->name,
++				(le16_to_cpu(desc->wMaxPacketSize) > 64)
++					? DMA_PRIO_MEDIUM /* some iso */
++					: DMA_PRIO_LOW,
++				// FIXME or ep_out_dma .. ..
++				dma_nodesc_handler, ep);
++		if (ep->dma >= 0) {
++			*ep->reg_drcmr = DRCMR_MAPVLD | ep->dma;
++			DMSG("%s using dma%d\n", _ep->name, ep->dma);
++		}
++	}
++#endif
++
++	DBG(DBG_VERBOSE, "enabled %s\n", _ep->name);
++	return 0;
++}
++
++static int pxa2xx_ep_disable (struct usb_ep *_ep)
++{
++	struct pxa2xx_ep	*ep;
++
++	ep = container_of (_ep, struct pxa2xx_ep, ep);
++	if (!_ep || !ep->desc) {
++		DMSG("%s, %s not enabled\n", __FUNCTION__,
++			_ep ? ep->ep.name : NULL);
++		return -EINVAL;
++	}
++	nuke (ep, -ESHUTDOWN);
++
++#ifdef	USE_DMA
++	if (ep->dma >= 0) {
++		*ep->reg_drcmr = 0;
++		pxa_free_dma (ep->dma);
++		ep->dma = -1;
++	}
++#endif
++
++	/* flush fifo (mostly for IN buffers) */
++	pxa2xx_ep_fifo_flush (_ep);
++
++	ep->desc = 0;
++	ep->stopped = 1;
++
++	DBG(DBG_VERBOSE, "%s disabled\n", _ep->name);
++	return 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* for the pxa2xx, these can just wrap kmalloc/kfree.  gadget drivers
++ * must still pass correctly initialized endpoints, since other controller
++ * drivers may care about how it's currently set up (dma issues etc).
++ */
++
++/*
++ * 	pxa2xx_ep_alloc_request - allocate a request data structure
++ */
++static struct usb_request *
++pxa2xx_ep_alloc_request (struct usb_ep *_ep, int gfp_flags)
++{
++	struct pxa2xx_request *req;
++
++	/* FIXME for bulk out-dma endpoints, preallocate a frame's worth of
++	 * (aligned) dma descriptors at the end of the request
++	 */
++
++	req = kmalloc (sizeof *req, gfp_flags);
++	if (!req)
++		return 0;
++
++	memset (req, 0, sizeof *req);
++	INIT_LIST_HEAD (&req->queue);
++	return &req->req;
++}
++
++
++/*
++ * 	pxa2xx_ep_free_request - deallocate a request data structure
++ */
++static void
++pxa2xx_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct pxa2xx_request	*req;
++
++	req = container_of (_req, struct pxa2xx_request, req);
++	WARN_ON (!list_empty (&req->queue));
++	kfree(req);
++}
++
++
++/* PXA cache needs flushing with DMA I/O (it's dma-incoherent), but there's
++ * no device-affinity and the heap works perfectly well for i/o buffers.
++ */
++static void *
++pxa2xx_ep_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
++	dma_addr_t *dma, int gfp_flags)
++{
++	char			*retval;
++
++	retval = kmalloc (bytes, gfp_flags & ~(__GFP_DMA|__GFP_HIGHMEM));
++	if (retval)
++		*dma = virt_to_bus (retval);
++	return retval;
++}
++
++static void
++pxa2xx_ep_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma,
++		unsigned bytes)
++{
++	kfree (buf);
++}
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ *	done - retire a request; caller blocked irqs
++ */
++static void done(struct pxa2xx_ep *ep, struct pxa2xx_request *req, int status)
++{
++	unsigned		stopped = ep->stopped;
++
++	list_del_init(&req->queue);
++
++	if (likely (req->req.status == -EINPROGRESS))
++		req->req.status = status;
++	else
++		status = req->req.status;
++
++	if (status && status != -ESHUTDOWN)
++		DBG(DBG_VERBOSE, "complete %s req %p stat %d len %u/%u\n",
++			ep->ep.name, &req->req, status,
++			req->req.actual, req->req.length);
++
++	/* don't modify queue heads during completion callback */
++	ep->stopped = 1;
++	req->req.complete(&ep->ep, &req->req);
++	ep->stopped = stopped;
++}
++
++
++static inline void ep0_idle (struct pxa2xx_udc *dev)
++{
++	dev->ep0state = EP0_IDLE;
++	LED_EP0_OFF;
++}
++
++static int
++write_packet(volatile u32 *uddr, struct pxa2xx_request *req, unsigned max)
++{
++	u8		*buf;
++	unsigned	length, count;
++
++	buf = req->req.buf + req->req.actual;
++	prefetch(buf);
++
++	/* how big will this packet be? */
++	length = min(req->req.length - req->req.actual, max);
++	req->req.actual += length;
++
++	count = length;
++	while (likely(count--))
++		*uddr = *buf++;
++
++	return length;
++}
++
++/*
++ * write to an IN endpoint fifo, as many packets as possible.
++ * irqs will use this to write the rest later.
++ * caller guarantees at least one packet buffer is ready (or a zlp).
++ */
++static int
++write_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req)
++{
++	unsigned		max;
++
++	max = le16_to_cpu(ep->desc->wMaxPacketSize);
++	do {
++		unsigned	count;
++		int		is_last, is_short;
++
++		count = write_packet(ep->reg_uddr, req, max);
++
++		/* last packet is usually short (or a zlp) */
++		if (unlikely (count != max))
++			is_last = is_short = 1;
++		else {
++			if (likely(req->req.length != req->req.actual)
++					|| req->req.zero)
++				is_last = 0;
++			else
++				is_last = 1;
++			/* interrupt/iso maxpacket may not fill the fifo */
++			is_short = unlikely (max < ep->fifo_size);
++		}
++
++		DBG(DBG_VERY_NOISY, "wrote %s %d bytes%s%s %d left %p\n",
++			ep->ep.name, count,
++			is_last ? "/L" : "", is_short ? "/S" : "",
++			req->req.length - req->req.actual, req);
++
++		/* let loose that packet. maybe try writing another one,
++		 * double buffering might work.  TSP, TPC, and TFS
++		 * bit values are the same for all normal IN endpoints.
++		 */
++		*ep->reg_udccs = UDCCS_BI_TPC;
++		if (is_short)
++			*ep->reg_udccs = UDCCS_BI_TSP;
++
++		/* requests complete when all IN data is in the FIFO */
++		if (is_last) {
++			done (ep, req, 0);
++			if (list_empty(&ep->queue) || unlikely(ep->dma >= 0))
++				pio_irq_disable (ep->bEndpointAddress);
++#ifdef USE_DMA
++			if (unlikely(ep->dma >= 0) && !list_empty(&ep->queue)) {
++DMSG("%s pio2dma\n", ep->ep.name);
++				req = list_entry(ep->queue.next,
++						struct pxa2xx_request, queue);
++				kick_dma(ep,req);
++				return 0;
++			}
++#endif
++			return 1;
++		}
++
++		// TODO experiment: how robust can fifo mode tweaking be?
++		// the double buffering could speed up I/O a bunch.
++
++	} while (*ep->reg_udccs & UDCCS_BI_TFS);
++	return 0;
++}
++
++/* caller asserts req->pending (ep0 irq status nyet cleared); starts
++ * ep0 data stage.  these chips want very simple state transitions.
++ */
++static inline
++void ep0start(struct pxa2xx_udc *dev, u32 flags, const char *tag)
++{
++	UDCCS0 = flags|UDCCS0_SA|UDCCS0_OPR;
++	USIR0 = USIR0_IR0;
++	dev->req_pending = 0;
++	DBG(DBG_VERY_NOISY, "%s %s, %02x/%02x\n",
++		__FUNCTION__, tag, UDCCS0, flags);
++}
++
++static int
++write_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req)
++{
++	unsigned	count;
++	int		is_short;
++
++	count = write_packet(&UDDR0, req, EP0_FIFO_SIZE);
++	ep->dev->stats.write.bytes += count;
++
++	/* last packet "must be" short (or a zlp) */
++	is_short = (count != EP0_FIFO_SIZE);
++
++	DBG(DBG_VERY_NOISY, "ep0in %d bytes %d left %p\n", count,
++		req->req.length - req->req.actual, req);
++
++	if (unlikely (is_short)) {
++		if (ep->dev->req_pending)
++			ep0start(ep->dev, UDCCS0_IPR, "short IN");
++		else
++			UDCCS0 = UDCCS0_IPR;
++
++		count = req->req.length;
++		done (ep, req, 0);
++		ep0_idle(ep->dev);
++#if 1
++		/* This seems to get rid of lost status irqs in some cases:
++		 * host responds quickly, or next request involves config
++		 * change automagic, or should have been hidden, or ...
++		 *
++		 * FIXME get rid of all udelays possible...
++		 */
++		if (count >= EP0_FIFO_SIZE) {
++			count = 100;
++			do {
++				if ((UDCCS0 & UDCCS0_OPR) != 0) {
++					/* clear OPR, generate ack */
++					UDCCS0 = UDCCS0_OPR;
++					break;
++				}
++				count--;
++				udelay(1);
++			} while (count);
++		}
++#endif
++	} else if (ep->dev->req_pending)
++		ep0start(ep->dev, 0, "IN");
++	return is_short;
++}
++
++
++/*
++ * read_fifo -  unload packet(s) from the fifo we use for usb OUT
++ * transfers and put them into the request.  caller should have made
++ * sure there's at least one packet ready.
++ *
++ * returns true if the request completed because of short packet or the
++ * request buffer having filled (and maybe overran till end-of-packet).
++ */
++static int
++read_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req)
++{
++	for (;;) {
++		u32		udccs;
++		u8		*buf;
++		unsigned	bufferspace, count, is_short;
++
++		/* make sure there's a packet in the FIFO.
++		 * UDCCS_{BO,IO}_RPC are all the same bit value.
++		 * UDCCS_{BO,IO}_RNE are all the same bit value.
++		 */
++		udccs = *ep->reg_udccs;
++		if (unlikely ((udccs & UDCCS_BO_RPC) == 0))
++			break;
++		buf = req->req.buf + req->req.actual;
++		prefetchw(buf);
++		bufferspace = req->req.length - req->req.actual;
++
++		/* read all bytes from this packet */
++		if (likely (udccs & UDCCS_BO_RNE)) {
++			count = 1 + (0x0ff & *ep->reg_ubcr);
++			req->req.actual += min (count, bufferspace);
++		} else /* zlp */
++			count = 0;
++		is_short = (count < ep->ep.maxpacket);
++		DBG(DBG_VERY_NOISY, "read %s %02x, %d bytes%s req %p %d/%d\n",
++			ep->ep.name, udccs, count,
++			is_short ? "/S" : "",
++			req, req->req.actual, req->req.length);
++		while (likely (count-- != 0)) {
++			u8	byte = (u8) *ep->reg_uddr;
++
++			if (unlikely (bufferspace == 0)) {
++				/* this happens when the driver's buffer
++				 * is smaller than what the host sent.
++				 * discard the extra data.
++				 */
++				if (req->req.status != -EOVERFLOW)
++					DMSG("%s overflow %d\n",
++						ep->ep.name, count);
++				req->req.status = -EOVERFLOW;
++			} else {
++				*buf++ = byte;
++				bufferspace--;
++			}
++		}
++		*ep->reg_udccs =  UDCCS_BO_RPC;
++		/* RPC/RSP/RNE could now reflect the other packet buffer */
++
++		/* iso is one request per packet */
++		if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
++			if (udccs & UDCCS_IO_ROF)
++				req->req.status = -EHOSTUNREACH;
++			/* more like "is_done" */
++			is_short = 1;
++		}
++
++		/* completion */
++		if (is_short || req->req.actual == req->req.length) {
++			done (ep, req, 0);
++			if (list_empty(&ep->queue))
++				pio_irq_disable (ep->bEndpointAddress);
++			return 1;
++		}
++
++		/* finished that packet.  the next one may be waiting... */
++	}
++	return 0;
++}
++
++/*
++ * special ep0 version of the above.  no UBCR0 or double buffering; status
++ * handshaking is magic.  most device protocols don't need control-OUT.
++ * CDC vendor commands (and RNDIS), mass storage CB/CBI, and some other
++ * protocols do use them.
++ */
++static int
++read_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req)
++{
++	u8		*buf, byte;
++	unsigned	bufferspace;
++
++	buf = req->req.buf + req->req.actual;
++	bufferspace = req->req.length - req->req.actual;
++
++	while (UDCCS0 & UDCCS0_RNE) {
++		byte = (u8) UDDR0;
++
++		if (unlikely (bufferspace == 0)) {
++			/* this happens when the driver's buffer
++			 * is smaller than what the host sent.
++			 * discard the extra data.
++			 */
++			if (req->req.status != -EOVERFLOW)
++				DMSG("%s overflow\n", ep->ep.name);
++			req->req.status = -EOVERFLOW;
++		} else {
++			*buf++ = byte;
++			req->req.actual++;
++			bufferspace--;
++		}
++	}
++	
++	UDCCS0 = UDCCS0_OPR | UDCCS0_IPR;
++	
++	/* completion */
++	if (req->req.actual >= req->req.length)
++		return 1;
++	
++	/* finished that packet.  the next one may be waiting... */
++	return 0;
++}
++
++#ifdef	USE_DMA
++
++static inline void
++start_dma_nodesc(struct pxa2xx_ep *ep, struct pxa2xx_request *req, int is_in)
++{
++	u32	dcmd = req->req.length;
++	u32	buf = virt_to_bus (req->req.buf);
++	u32	fifo = io_v2p ((u32)ep->reg_uddr);
++
++	/* no-descriptor mode can be simple for bulk-in, iso-in, iso-out */
++	DCSR(ep->dma) = DCSR_NODESC;
++	dcmd |= DCMD_BURST32 | DCMD_ENDIRQEN | DCMD_WIDTH1;
++	if (is_in) {
++		DSADR(ep->dma) = buf;
++		DTADR(ep->dma) = fifo;
++		dcmd |= DCMD_FLOWTRG | DCMD_INCSRCADDR;
++	} else {
++		DSADR(ep->dma) = fifo;
++		DTADR(ep->dma) = buf;
++		dcmd |= DCMD_FLOWSRC | DCMD_INCTRGADDR;
++	}
++	DCMD(ep->dma) = dcmd;
++	DCSR(ep->dma) = DCSR_RUN | DCSR_STOPIRQEN | DCSR_NODESC;
++	/* and later the dma handler gets called */
++}
++
++static void kick_dma(struct pxa2xx_ep *ep, struct pxa2xx_request *req)
++{
++	if (ep->bEndpointAddress & USB_DIR_IN) {
++		/* docs imply we can't preload with pio */
++		if ((((u32)req->req.buf) & 0x0f) != 0) {
++// VERBOSE
++			DMSG("%s bad DMA align %p\n",
++				ep->ep.name, req->req.buf);
++pio_in:
++// FIXME PIO fallback doesn't work right yet (recovery?)
++DMSG("%s dma2pio\n", ep->ep.name);
++			pio_irq_enable(ep->bEndpointAddress);
++			if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0)
++				(void) write_fifo(ep, req);
++			return;
++		}
++		/* dmacount 0 means end-of-transfer */
++		if (unlikely((req->req.length - req->req.actual) == 0)) {
++// VERBOSE
++			DMSG("%s zlp dma write...\n", ep->ep.name);
++			goto pio_in;
++		}
++		start_dma_nodesc(ep, req, USB_DIR_IN);
++	} else {
++		// if ISO, use no-descriptor DMA
++		BUG();
++	}
++}
++
++static void cancel_dma(struct pxa2xx_ep *ep)
++{
++	struct pxa2xx_request	*req;
++	u32			tmp;
++
++	if (DCSR(ep->dma) == 0 || list_empty(&ep->queue))
++		return;
++
++	DCSR(ep->dma) = 0;
++	while ((DCSR(ep->dma) & DCSR_STOPSTATE) == 0)
++		cpu_relax();
++
++	req = list_entry(ep->queue.next, struct pxa2xx_request, queue);
++	tmp = DCMD(ep->dma) & DCMD_LENGTH;
++	req->req.actual = req->req.length - (tmp & DCMD_LENGTH);
++
++	/* the last tx packet may be incomplete, so flush the fifo.
++	 * FIXME correct req.actual if we can
++	 */
++	if (ep->bEndpointAddress & USB_DIR_IN)
++		*ep->reg_udccs = UDCCS_BI_FTF;
++}
++
++static void dma_nodesc_handler(int dmach, void *_ep, struct pt_regs *r)
++{
++	struct pxa2xx_ep	*ep = _ep;
++	struct pxa2xx_request	*req;
++	u32			tmp;
++
++	req = list_entry(ep->queue.next, struct pxa2xx_request, queue);
++
++	ep->dev->stats.irqs++;
++	HEX_DISPLAY(ep->dev->stats.irqs);
++
++	/* ack/clear */
++	tmp = DCSR(ep->dma);
++	DCSR(ep->dma) = tmp;
++	if ((tmp & DCSR_STOPSTATE) == 0
++			|| (DDADR(ep->dma) & DDADR_STOP) != 0) {
++		DBG(DBG_VERBOSE, "%s, dcsr %08x ddadr %08x\n",
++			ep->ep.name, DCSR(ep->dma), DDADR(ep->dma));
++		return;
++	}
++	DCSR(ep->dma) = 0;	/* clear DCSR_STOPSTATE */
++
++	/* wrap up the transfer, and collect status */
++	if (unlikely(tmp & DCSR_BUSERR))
++		req->req.status = -EIO;
++	tmp = DCMD(ep->dma);
++	req->req.actual = req->req.length - (tmp & DCMD_LENGTH);
++	tmp = 1;	/* normally this is the last packet */
++
++	if (ep->bEndpointAddress & USB_DIR_IN) {
++		/* maybe validate final short packet */
++		if ((ep->bmAttributes == USB_ENDPOINT_XFER_BULK
++					&& req->req.actual % BULK_FIFO_SIZE)
++				|| (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
++					&& req->req.actual % ISO_FIFO_SIZE))
++			*ep->reg_udccs = UDCCS_BI_TSP /*|UDCCS_BI_TPC*/;
++
++		/* or force a zlp, with pio ... */
++		else if (ep->bmAttributes == USB_ENDPOINT_XFER_BULK
++				&& req->req.zero) {
++			tmp = 0;
++		}
++		// if iso, maybe report underrun (TUR)
++	} else {
++		BUG();
++	}
++
++	if (likely(tmp != 0))
++		done(ep, req, 0);
++
++	/* maybe re-activate after completion */
++	if (ep->stopped || list_empty(&ep->queue))
++		return;
++	req = list_entry(ep->queue.next, struct pxa2xx_request, queue);
++	kick_dma(ep, req);
++}
++
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++static int
++pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
++{
++	struct pxa2xx_request	*req;
++	struct pxa2xx_ep	*ep;
++	struct pxa2xx_udc	*dev;
++	unsigned long		flags;
++
++	req = container_of(_req, struct pxa2xx_request, req);
++	if (unlikely (!_req || !_req->complete || !_req->buf
++			|| !list_empty(&req->queue))) {
++		DMSG("%s, bad params\n", __FUNCTION__);
++		return -EINVAL;
++	}
++
++	ep = container_of(_ep, struct pxa2xx_ep, ep);
++	if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return -EINVAL;
++	}
++
++	dev = ep->dev;
++	if (unlikely (!dev->driver
++			|| dev->gadget.speed == USB_SPEED_UNKNOWN)) {
++		DMSG("%s, bogus device state\n", __FUNCTION__);
++		return -ESHUTDOWN;
++	}
++
++	/* iso is always one packet per request, that's the only way
++	 * we can report per-packet status.  that also helps with dma.
++	 */
++	if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
++			&& req->req.length > le16_to_cpu
++						(ep->desc->wMaxPacketSize)))
++		return -EMSGSIZE;
++
++#ifdef	USE_DMA
++	if (ep->dma >= 0) {
++		unsigned long	start = (unsigned long) _req->buf;
++
++		clean_dcache_range(start, start + _req->length);
++		/* or for USB_DIR_OUT, invalidate_dcache_range (...) */
++	}
++#endif
++
++	DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n",
++	     _ep->name, _req, _req->length, _req->buf);
++
++	local_irq_save(flags);
++
++	_req->status = -EINPROGRESS;
++	_req->actual = 0;
++
++	/* kickstart this i/o queue? */
++	if (list_empty(&ep->queue) && !ep->stopped) {
++		if (ep->desc == 0 /* ep0 */) {
++			unsigned	length = _req->length;
++
++			switch (dev->ep0state) {
++			case EP0_IN_DATA_PHASE:
++				dev->stats.write.ops++;
++				if (write_ep0_fifo(ep, req))
++					req = 0;
++				break;
++
++			case EP0_OUT_DATA_PHASE:
++				dev->stats.read.ops++;
++				/* messy ... */
++				if (dev->req_config) {
++					DBG(DBG_VERBOSE, "ep0 config ack%s\n",
++						dev->has_cfr ?  "" : " raced");
++					if (dev->has_cfr)
++						UDCCFR = UDCCFR_AREN|UDCCFR_ACM;
++					done(ep, req, 0);
++					dev->ep0state = EP0_END_XFER;
++					local_irq_restore (flags);
++					return 0;
++				}
++				if (dev->req_pending)
++					ep0start(dev, UDCCS0_IPR, "OUT");
++				if (length == 0 || ((UDCCS0 & UDCCS0_RNE) != 0
++						&& read_ep0_fifo(ep, req))) {
++					ep0_idle(dev);
++					done(ep, req, 0);
++					req = 0;
++				}
++				break;
++
++			default:
++				DMSG("ep0 i/o, odd state %d\n", dev->ep0state);
++				local_irq_restore (flags);
++				return -EL2HLT;
++			}
++#ifdef	USE_DMA
++		/* either start dma or prime pio pump */
++		} else if (ep->dma >= 0) {
++			kick_dma(ep, req);
++#endif
++		/* can the FIFO can satisfy the request immediately? */
++		} else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
++				&& (*ep->reg_udccs & UDCCS_BI_TFS) != 0
++				&& write_fifo(ep, req)) {
++			req = 0;
++		} else if ((*ep->reg_udccs & UDCCS_BO_RFS) != 0
++				&& read_fifo(ep, req)) {
++			req = 0;
++		}
++
++		if (likely (req && ep->desc) && ep->dma < 0)
++			pio_irq_enable(ep->bEndpointAddress);
++	}
++
++	/* pio or dma irq handler advances the queue. */
++	if (likely (req != 0))
++		list_add_tail(&req->queue, &ep->queue);
++	local_irq_restore(flags);
++
++	return 0;
++}
++
++
++/*
++ * 	nuke - dequeue ALL requests
++ */
++static void nuke(struct pxa2xx_ep *ep, int status)
++{
++	struct pxa2xx_request *req;
++
++	/* called with irqs blocked */
++#ifdef	USE_DMA
++	if (ep->dma >= 0 && !ep->stopped)
++		cancel_dma(ep);
++#endif
++	while (!list_empty(&ep->queue)) {
++		req = list_entry(ep->queue.next,
++				struct pxa2xx_request,
++				queue);
++		done(ep, req, status);
++	}
++	if (ep->desc)
++		pio_irq_disable (ep->bEndpointAddress);
++}
++
++
++/* dequeue JUST ONE request */
++static int pxa2xx_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct pxa2xx_ep	*ep;
++	struct pxa2xx_request	*req;
++	unsigned long		flags;
++
++	ep = container_of(_ep, struct pxa2xx_ep, ep);
++	if (!_ep || ep->ep.name == ep0name)
++		return -EINVAL;
++
++	local_irq_save(flags);
++
++	/* make sure it's actually queued on this endpoint */
++	list_for_each_entry (req, &ep->queue, queue) {
++		if (&req->req == _req)
++			break;
++	}
++	if (&req->req != _req) {
++		local_irq_restore(flags);
++		return -EINVAL;
++	}
++
++#ifdef	USE_DMA
++	if (ep->dma >= 0 && ep->queue.next == &req->queue && !ep->stopped) {
++		cancel_dma(ep);
++		done(ep, req, -ECONNRESET);
++		/* restart i/o */
++		if (!list_empty(&ep->queue)) {
++			req = list_entry(ep->queue.next,
++					struct pxa2xx_request, queue);
++			kick_dma(ep, req);
++		}
++	} else
++#endif
++		done(ep, req, -ECONNRESET);
++
++	local_irq_restore(flags);
++	return 0;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static int pxa2xx_ep_set_halt(struct usb_ep *_ep, int value)
++{
++	struct pxa2xx_ep	*ep;
++	unsigned long		flags;
++
++	ep = container_of(_ep, struct pxa2xx_ep, ep);
++	if (unlikely (!_ep
++			|| (!ep->desc && ep->ep.name != ep0name))
++			|| ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return -EINVAL;
++	}
++	if (value == 0) {
++		/* this path (reset toggle+halt) is needed to implement
++		 * SET_INTERFACE on normal hardware.  but it can't be
++		 * done from software on the PXA UDC, and the hardware
++		 * forgets to do it as part of SET_INTERFACE automagic.
++		 */
++		DMSG("only host can clear %s halt\n", _ep->name);
++		return -EROFS;
++	}
++
++	local_irq_save(flags);
++
++	if ((ep->bEndpointAddress & USB_DIR_IN) != 0
++			&& ((*ep->reg_udccs & UDCCS_BI_TFS) == 0
++			   || !list_empty(&ep->queue))) {
++		local_irq_restore(flags);
++		return -EAGAIN;
++	}
++
++	/* FST bit is the same for control, bulk in, bulk out, interrupt in */
++	*ep->reg_udccs = UDCCS_BI_FST|UDCCS_BI_FTF;
++
++	/* ep0 needs special care */
++	if (!ep->desc) {
++		start_watchdog(ep->dev);
++		ep->dev->req_pending = 0;
++		ep->dev->ep0state = EP0_STALL;
++		LED_EP0_OFF;
++
++ 	/* and bulk/intr endpoints like dropping stalls too */
++ 	} else {
++ 		unsigned i;
++ 		for (i = 0; i < 1000; i += 20) {
++ 			if (*ep->reg_udccs & UDCCS_BI_SST)
++ 				break;
++ 			udelay(20);
++ 		}
++  	}
++ 	local_irq_restore(flags);
++
++	DBG(DBG_VERBOSE, "%s halt\n", _ep->name);
++	return 0;
++}
++
++static int pxa2xx_ep_fifo_status(struct usb_ep *_ep)
++{
++	struct pxa2xx_ep        *ep;
++
++	ep = container_of(_ep, struct pxa2xx_ep, ep);
++	if (!_ep) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return -ENODEV;
++	}
++	/* pxa can't report unclaimed bytes from IN fifos */
++	if ((ep->bEndpointAddress & USB_DIR_IN) != 0)
++		return -EOPNOTSUPP;
++	if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN
++			|| (*ep->reg_udccs & UDCCS_BO_RFS) == 0)
++		return 0;
++	else
++		return (*ep->reg_ubcr & 0xfff) + 1;
++}
++
++static void pxa2xx_ep_fifo_flush(struct usb_ep *_ep)
++{
++	struct pxa2xx_ep        *ep;
++
++	ep = container_of(_ep, struct pxa2xx_ep, ep);
++	if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return;
++	}
++
++	/* toggle and halt bits stay unchanged */
++
++	/* for OUT, just read and discard the FIFO contents. */
++	if ((ep->bEndpointAddress & USB_DIR_IN) == 0) {
++		while (((*ep->reg_udccs) & UDCCS_BO_RNE) != 0)
++			(void) *ep->reg_uddr;
++		return;
++	}
++
++	/* most IN status is the same, but ISO can't stall */
++	*ep->reg_udccs = UDCCS_BI_TPC|UDCCS_BI_FTF|UDCCS_BI_TUR
++		| (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
++			? 0 : UDCCS_BI_SST;
++}
++
++
++static struct usb_ep_ops pxa2xx_ep_ops = {
++	.enable		= pxa2xx_ep_enable,
++	.disable	= pxa2xx_ep_disable,
++
++	.alloc_request	= pxa2xx_ep_alloc_request,
++	.free_request	= pxa2xx_ep_free_request,
++
++	.alloc_buffer	= pxa2xx_ep_alloc_buffer,
++	.free_buffer	= pxa2xx_ep_free_buffer,
++
++	.queue		= pxa2xx_ep_queue,
++	.dequeue	= pxa2xx_ep_dequeue,
++
++	.set_halt	= pxa2xx_ep_set_halt,
++	.fifo_status	= pxa2xx_ep_fifo_status,
++	.fifo_flush	= pxa2xx_ep_fifo_flush,
++};
++
++
++/* ---------------------------------------------------------------------------
++ * 	device-scoped parts of the api to the usb controller hardware
++ * ---------------------------------------------------------------------------
++ */
++
++static int pxa2xx_udc_get_frame(struct usb_gadget *_gadget)
++{
++	return ((UFNRH & 0x07) << 8) | (UFNRL & 0xff);
++}
++
++static int pxa2xx_udc_wakeup(struct usb_gadget *_gadget)
++{
++	/* host may not have enabled remote wakeup */
++	if ((UDCCS0 & UDCCS0_DRWF) == 0)
++		return -EHOSTUNREACH;
++	udc_set_mask_UDCCR(UDCCR_RSM);
++	return 0;
++}
++
++static const struct usb_gadget_ops pxa2xx_udc_ops = {
++	.get_frame	 = pxa2xx_udc_get_frame,
++	.wakeup		 = pxa2xx_udc_wakeup,
++	// current versions must always be self-powered
++};
++
++
++/*-------------------------------------------------------------------------*/
++
++#ifdef UDC_PROC_FILE
++
++static const char proc_node_name [] = "driver/udc";
++
++static int
++udc_proc_read(char *page, char **start, off_t off, int count,
++		int *eof, void *_dev)
++{
++	char			*buf = page;
++	struct pxa2xx_udc	*dev = _dev;
++	char			*next = buf;
++	unsigned		size = count;
++	unsigned long		flags;
++	int			i, t;
++	u32			tmp;
++
++	if (off != 0)
++		return 0;
++
++	local_irq_save(flags);
++
++	/* basic device status */
++	t = snprintf(next, size, DRIVER_DESC "\n"
++		"%s version: %s\nGadget driver: %s\nHost %s\n\n",
++		driver_name, DRIVER_VERSION SIZE_STR DMASTR,
++		dev->driver ? dev->driver->driver.name : "(none)",
++		is_usb_connected() ? "full speed" : "disconnected");
++	size -= t;
++	next += t;
++
++	/* registers for device and ep0 */
++	t = snprintf(next, size,
++		"uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
++		UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
++	size -= t;
++	next += t;
++
++	tmp = UDCCR;
++	t = snprintf(next, size,
++		"udccr %02X =%s%s%s%s%s%s%s%s\n", tmp,
++		(tmp & UDCCR_REM) ? " rem" : "",
++		(tmp & UDCCR_RSTIR) ? " rstir" : "",
++		(tmp & UDCCR_SRM) ? " srm" : "",
++		(tmp & UDCCR_SUSIR) ? " susir" : "",
++		(tmp & UDCCR_RESIR) ? " resir" : "",
++		(tmp & UDCCR_RSM) ? " rsm" : "",
++		(tmp & UDCCR_UDA) ? " uda" : "",
++		(tmp & UDCCR_UDE) ? " ude" : "");
++	size -= t;
++	next += t;
++
++	tmp = UDCCS0;
++	t = snprintf(next, size,
++		"udccs0 %02X =%s%s%s%s%s%s%s%s\n", tmp,
++		(tmp & UDCCS0_SA) ? " sa" : "",
++		(tmp & UDCCS0_RNE) ? " rne" : "",
++		(tmp & UDCCS0_FST) ? " fst" : "",
++		(tmp & UDCCS0_SST) ? " sst" : "",
++		(tmp & UDCCS0_DRWF) ? " dwrf" : "",
++		(tmp & UDCCS0_FTF) ? " ftf" : "",
++		(tmp & UDCCS0_IPR) ? " ipr" : "",
++		(tmp & UDCCS0_OPR) ? " opr" : "");
++	size -= t;
++	next += t;
++
++	if (dev->has_cfr) {
++		tmp = UDCCFR;
++		t = snprintf(next, size,
++			"udccfr %02X =%s%s\n", tmp,
++			(tmp & UDCCFR_AREN) ? " aren" : "",
++			(tmp & UDCCFR_ACM) ? " acm" : "");
++		size -= t;
++		next += t;
++	}
++
++	if (!is_usb_connected() || !dev->driver)
++		goto done;
++
++	t = snprintf(next, size, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n",
++		dev->stats.write.bytes, dev->stats.write.ops,
++		dev->stats.read.bytes, dev->stats.read.ops,
++		dev->stats.irqs);
++	size -= t;
++	next += t;
++
++	/* dump endpoint queues */
++	for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
++		struct pxa2xx_ep	*ep = &dev->ep [i];
++		struct pxa2xx_request	*req;
++		int			t;
++
++		if (i != 0) {
++			const struct usb_endpoint_descriptor	*d;
++
++			d = ep->desc;
++			if (!d)
++				continue;
++			tmp = *dev->ep [i].reg_udccs;
++			t = snprintf(next, size,
++				"%s max %d %s udccs %02x irqs %lu/%lu\n",
++				ep->ep.name, le16_to_cpu (d->wMaxPacketSize),
++				(ep->dma >= 0) ? "dma" : "pio", tmp,
++				ep->pio_irqs, ep->dma_irqs);
++			/* TODO translate all five groups of udccs bits! */
++
++		} else /* ep0 should only have one transfer queued */
++			t = snprintf(next, size, "ep0 max 16 pio irqs %lu\n",
++				ep->pio_irqs);
++		if (t <= 0 || t > size)
++			goto done;
++		size -= t;
++		next += t;
++
++		if (list_empty(&ep->queue)) {
++			t = snprintf(next, size, "\t(nothing queued)\n");
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++			continue;
++		}
++		list_for_each_entry(req, &ep->queue, queue) {
++#ifdef	USE_DMA
++			if (ep->dma >= 0 && req->queue.prev == &ep->queue)
++				t = snprintf(next, size,
++					"\treq %p len %d/%d "
++					"buf %p (dma%d dcmd %08x)\n",
++					&req->req, req->req.actual,
++					req->req.length, req->req.buf,
++					ep->dma, DCMD(ep->dma)
++					// low 13 bits == bytes-to-go
++					);
++			else
++#endif
++				t = snprintf(next, size,
++					"\treq %p len %d/%d buf %p\n",
++					&req->req, req->req.actual,
++					req->req.length, req->req.buf);
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++		}
++	}
++
++done:
++	local_irq_restore(flags);
++	*eof = 1;
++	return count - size;
++}
++
++#define create_proc_files() \
++	create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
++#define remove_proc_files() \
++	remove_proc_entry(proc_node_name, NULL)
++
++#else	/* !UDC_PROC_FILE */
++#define create_proc_files() do {} while (0)
++#define remove_proc_files() do {} while (0)
++
++#endif	/* UDC_PROC_FILE */
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * 	udc_disable - disable USB device controller
++ */
++static void udc_disable(struct pxa2xx_udc *dev)
++{
++	/* block all irqs */
++	udc_set_mask_UDCCR(UDCCR_SRM|UDCCR_REM);
++	UICR0 = UICR1 = 0xff;
++	UFNRH = UFNRH_SIM;
++
++	/* if hardware supports it, disconnect from usb */
++	make_usb_disappear();
++
++	udc_clear_mask_UDCCR(UDCCR_UDE);
++
++#ifdef	CONFIG_ARCH_PXA
++        /* Disable clock for USB device */
++        CKEN &= ~CKEN11_USB;
++#endif
++
++	ep0_idle (dev);
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++	LED_CONNECTED_OFF;
++}
++
++
++/*
++ * 	udc_reinit - initialize software state
++ */
++static void udc_reinit(struct pxa2xx_udc *dev)
++{
++	u32	i;
++
++	/* device/ep0 records init */
++	INIT_LIST_HEAD (&dev->gadget.ep_list);
++	INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
++	dev->ep0state = EP0_IDLE;
++
++	/* basic endpoint records init */
++	for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
++		struct pxa2xx_ep *ep = &dev->ep[i];
++
++		if (i != 0)
++			list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
++
++		ep->desc = 0;
++		ep->stopped = 0;
++		INIT_LIST_HEAD (&ep->queue);
++		ep->pio_irqs = ep->dma_irqs = 0;
++	}
++
++	/* the rest was statically initialized, and is read-only */
++}
++
++/* until it's enabled, this UDC should be completely invisible
++ * to any USB host.
++ */
++static void udc_enable (struct pxa2xx_udc *dev)
++{
++	udc_clear_mask_UDCCR(UDCCR_UDE);
++
++#ifdef	CONFIG_ARCH_PXA
++        /* Enable clock for USB device */
++        CKEN |= CKEN11_USB;
++#endif
++
++	/* try to clear these bits before we enable the udc */
++	udc_ack_int_UDCCR(UDCCR_SUSIR|/*UDCCR_RSTIR|*/UDCCR_RESIR);
++
++	ep0_idle(dev);
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++	dev->stats.irqs = 0;
++
++	/*
++	 * sequence taken from chapter 12.5.10, PXA250 AppProcDevManual:
++	 * - enable UDC
++	 * - if RESET is already in progress, ack interrupt
++	 * - unmask reset interrupt
++	 */
++	udc_set_mask_UDCCR(UDCCR_UDE);
++	if (!(UDCCR & UDCCR_UDA))
++		udc_ack_int_UDCCR(UDCCR_RSTIR);
++
++	if (dev->has_cfr /* UDC_RES2 is defined */) {
++		/* pxa255 (a0+) can avoid a set_config race that could
++		 * prevent gadget drivers from configuring correctly
++		 */
++		UDCCFR = UDCCFR_ACM;
++	} else {
++		/* "USB test mode" for pxa250 errata 40-42 (stepping a0, a1)
++		 * which could result in missing packets and interrupts.
++		 * supposedly one bit per endpoint, controlling whether it
++		 * double buffers or not; ACM/AREN bits fit into the holes.
++		 * zero bits (like USIR0_IRx) disable double buffering.
++		 */
++		UDC_RES1 = 0x00;
++		UDC_RES2 = 0x00;
++	}
++
++#ifdef	DISABLE_TEST_MODE
++	/* "test mode" seems to have become the default in later chip
++	 * revs, preventing double buffering (and invalidating docs).
++	 * this EXPERIMENT enables it for bulk endpoints by tweaking
++	 * undefined/reserved register bits (that other drivers clear).
++	 * Belcarra code comments noted this usage.
++	 */
++	if (fifo_mode & 1) {	/* IN endpoints */
++		UDC_RES1 |= USIR0_IR1|USIR0_IR6;
++		UDC_RES2 |= USIR1_IR11;
++	}
++	if (fifo_mode & 2) {	/* OUT endpoints */
++		UDC_RES1 |= USIR0_IR2|USIR0_IR7;
++		UDC_RES2 |= USIR1_IR12;
++	}
++#endif
++
++	/* caller must be able to sleep in order to cope
++	 * with startup transients.
++	 */
++	schedule_timeout(HZ/10);
++
++	/* enable suspend/resume and reset irqs */
++	udc_clear_mask_UDCCR(UDCCR_SRM | UDCCR_REM);
++
++	/* enable ep0 irqs */
++	UICR0 &= ~UICR0_IM0;
++
++	/* if hardware supports it, connect to usb and wait for host */
++	let_usb_appear();
++}
++
++
++/* when a driver is successfully registered, it will receive
++ * control requests including set_configuration(), which enables
++ * non-control requests.  then usb traffic follows until a
++ * disconnect is reported.  then a host may connect again, or
++ * the driver might get unbound.
++ */
++int usb_gadget_register_driver(struct usb_gadget_driver *driver)
++{
++	struct pxa2xx_udc	*dev = the_controller;
++	int			retval;
++
++	if (!driver
++			|| driver->speed != USB_SPEED_FULL
++			|| !driver->bind
++			|| !driver->unbind
++			|| !driver->disconnect
++			|| !driver->setup)
++		return -EINVAL;
++	if (!dev)
++		return -ENODEV;
++	if (dev->driver)
++		return -EBUSY;
++
++	/* first hook up the driver ... */
++	dev->driver = driver;
++
++	retval = driver->bind(&dev->gadget);
++	if (retval) {
++		DMSG("bind to driver %s --> error %d\n",
++				driver->driver.name, retval);
++		dev->driver = 0;
++		return retval;
++	}
++
++	/* ... then enable host detection and ep0; and we're ready
++	 * for set_configuration as well as eventual disconnect.
++	 * NOTE:  this shouldn't power up until later.
++	 */
++	DMSG("registered gadget driver '%s'\n", driver->driver.name);
++	udc_enable(dev);
++	dump_state(dev);
++	return 0;
++}
++EXPORT_SYMBOL(usb_gadget_register_driver);
++
++static void
++stop_activity(struct pxa2xx_udc *dev, struct usb_gadget_driver *driver)
++{
++	int i;
++
++	/* don't disconnect drivers more than once */
++	if (dev->gadget.speed == USB_SPEED_UNKNOWN)
++		driver = 0;
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++
++	/* prevent new request submissions, kill any outstanding requests  */
++	for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
++		struct pxa2xx_ep *ep = &dev->ep[i];
++
++		ep->stopped = 1;
++		nuke(ep, -ESHUTDOWN);
++	}
++	del_timer_sync(&dev->timer);
++
++	/* report disconnect; the driver is already quiesced */
++	LED_CONNECTED_OFF;
++	if (driver)
++		driver->disconnect(&dev->gadget);
++
++	/* re-init driver-visible data structures */
++	udc_reinit(dev);
++}
++
++int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
++{
++	struct pxa2xx_udc	*dev = the_controller;
++
++	if (!dev)
++		return -ENODEV;
++	if (!driver || driver != dev->driver)
++		return -EINVAL;
++
++	local_irq_disable();
++	udc_disable(dev);
++	stop_activity(dev, driver);
++	local_irq_enable();
++
++	driver->unbind(&dev->gadget);
++	dev->driver = 0;
++
++	DMSG("unregistered gadget driver '%s'\n", driver->driver.name);
++	dump_state(dev);
++	return 0;
++}
++EXPORT_SYMBOL(usb_gadget_unregister_driver);
++
++
++/*-------------------------------------------------------------------------*/
++
++#ifdef CONFIG_ARCH_LUBBOCK
++#ifdef LUBBOCK_USB_DISC_IRQ
++
++/* Lubbock can report connect or disconnect irqs.  Likely more hardware
++ * could support it as a timer callback.
++ *
++ * FIXME for better power management, keep the hardware powered down
++ * until a host is powering the link.  means scheduling work later
++ * in some task that can udc_enable().
++ */
++
++#define	enable_disconnect_irq() \
++	if (machine_is_lubbock()) { enable_irq(LUBBOCK_USB_DISC_IRQ); }
++#define	disable_disconnect_irq() \
++	if (machine_is_lubbock()) { disable_irq(LUBBOCK_USB_DISC_IRQ); }
++
++static irqreturn_t
++usb_connection_irq(int irq, void *_dev, struct pt_regs *r)
++{
++	struct pxa2xx_udc	*dev = _dev;
++
++	dev->stats.irqs++;
++	HEX_DISPLAY(dev->stats.irqs);
++
++	if (!is_usb_connected()) {
++		LED_CONNECTED_OFF;
++		disable_disconnect_irq();
++		/* report disconnect just once */
++		if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
++			DMSG("disconnect %s\n",
++				dev->driver ? dev->driver->driver.name : 0);
++			stop_activity(dev, dev->driver);
++
++			// udc_disable (dev);
++			// no more udc irqs
++			// maybe "ACTION=disconnect /sbin/hotplug gadget".
++		}
++	} else if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
++		LED_CONNECTED_ON;
++
++		DMSG("?? connect irq ??\n");
++
++		// if there's no driver bound, ignore; else
++		// udc_enable (dev);
++		// UDC irqs drive the rest.
++		// maybe "ACTION=connect /sbin/hotplug gadget".
++	}
++	return IRQ_HANDLED;
++}
++
++#endif
++#endif
++
++#ifndef	enable_disconnect_irq
++#warning USB disconnect() is not yet reported.
++#define	enable_disconnect_irq()		do {} while (0)
++#define	disable_disconnect_irq()	do {} while (0)
++#endif
++
++
++/*-------------------------------------------------------------------------*/
++
++static inline void clear_ep_state (struct pxa2xx_udc *dev)
++{
++	unsigned i;
++
++	/* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
++	 * fifos, and pending transactions mustn't be continued in any case.
++	 */
++	for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++)
++		nuke(&dev->ep[i], -ECONNABORTED);
++}
++
++static void udc_watchdog(unsigned long _dev)
++{
++	struct pxa2xx_udc	*dev = (void *)_dev;
++
++	local_irq_disable();
++	if (dev->ep0state == EP0_STALL
++			&& (UDCCS0 & UDCCS0_FST) == 0
++			&& (UDCCS0 & UDCCS0_SST) == 0) {
++		UDCCS0 = UDCCS0_FST|UDCCS0_FTF;
++		DBG(DBG_VERBOSE, "ep0 re-stall\n");
++		start_watchdog(dev);
++	}
++	local_irq_enable();
++}
++
++static void handle_ep0 (struct pxa2xx_udc *dev)
++{
++	u32			udccs0 = UDCCS0;
++	struct pxa2xx_ep	*ep = &dev->ep [0];
++	struct pxa2xx_request	*req;
++	union {
++		struct usb_ctrlrequest	r;
++		u8			raw [8];
++		u32			word [2];
++	} u;
++
++	if (list_empty(&ep->queue))
++		req = 0;
++	else
++		req = list_entry(ep->queue.next, struct pxa2xx_request, queue);
++
++	/* clear stall status */
++	if (udccs0 & UDCCS0_SST) {
++		nuke(ep, -EPIPE);
++		UDCCS0 = UDCCS0_SST;
++		del_timer(&dev->timer);
++		ep0_idle(dev);
++	}
++
++	/* previous request unfinished?  non-error iff back-to-back ... */
++	if ((udccs0 & UDCCS0_SA) != 0 && dev->ep0state != EP0_IDLE) {
++		nuke(ep, 0);
++		del_timer(&dev->timer);
++		ep0_idle(dev);
++	}
++
++	switch (dev->ep0state) {
++	case EP0_IDLE:
++		/* late-breaking status? */
++		udccs0 = UDCCS0;
++
++		/* start control request? */
++		if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))
++				== (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))) {
++			int i;
++
++			nuke (ep, -EPROTO);
++
++			/* read SETUP packet */
++			for (i = 0; i < 8; i++) {
++				if (unlikely(!(UDCCS0 & UDCCS0_RNE))) {
++bad_setup:
++					DMSG("SETUP %d!\n", i);
++					goto stall;
++				}
++				u.raw [i] = (u8) UDDR0;
++			}
++			if (unlikely((UDCCS0 & UDCCS0_RNE) != 0))
++				goto bad_setup;
++
++got_setup:
++			le16_to_cpus (&u.r.wValue);
++			le16_to_cpus (&u.r.wIndex);
++			le16_to_cpus (&u.r.wLength);
++
++			LED_EP0_ON;
++			DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n",
++				u.r.bRequestType, u.r.bRequest,
++				u.r.wValue, u.r.wIndex, u.r.wLength);
++
++			/* cope with automagic for some standard requests. */
++			dev->req_std = (u.r.bRequestType & USB_TYPE_MASK)
++						== USB_TYPE_STANDARD;
++			dev->req_config = 0;
++			dev->req_pending = 1;
++			switch (u.r.bRequest) {
++			/* hardware restricts gadget drivers here! */
++			case USB_REQ_SET_CONFIGURATION:
++				if (u.r.bRequestType == USB_RECIP_DEVICE) {
++					/* reflect hardware's automagic
++					 * up to the gadget driver.
++					 */
++config_change:
++					dev->req_config = 1;
++					clear_ep_state(dev);
++					/* if !has_cfr, there's no synch
++					 * else use AREN (later) not SA|OPR
++					 * USIR0_IR0 acts edge sensitive
++					 */
++				}
++				break;
++			/* ... and here, even more ... */
++			case USB_REQ_SET_INTERFACE:
++				if (u.r.bRequestType == USB_RECIP_INTERFACE) {
++					/* udc hardware is broken by design:
++					 *  - altsetting may only be zero;
++					 *  - hw resets all interfaces' eps;
++					 *  - ep reset doesn't include halt(?).
++					 */
++					DMSG("broken set_interface (%d/%d)\n",
++						u.r.wIndex, u.r.wValue);
++					goto config_change;
++				}
++				break;
++			/* hardware was supposed to hide this */
++			case USB_REQ_SET_ADDRESS:
++				if (u.r.bRequestType == USB_RECIP_DEVICE) {
++					ep0start(dev, 0, "address");
++					return;
++				}
++				break;
++			}
++
++			if (u.r.bRequestType & USB_DIR_IN)
++				dev->ep0state = EP0_IN_DATA_PHASE;
++			else
++				dev->ep0state = EP0_OUT_DATA_PHASE;
++
++			i = dev->driver->setup(&dev->gadget, &u.r);
++			if (i < 0) {
++				/* hardware automagic preventing STALL... */
++				if (dev->req_config) {
++					/* hardware sometimes neglects to tell
++					 * tell us about config change events,
++					 * so later ones may fail...
++					 */
++					WARN("config change %02x fail %d?\n",
++						u.r.bRequest, i);
++					return;
++					/* TODO experiment:  if has_cfr,
++					 * hardware didn't ACK; maybe we
++					 * could actually STALL!
++					 */
++				}
++				DBG(DBG_VERBOSE, "protocol STALL, "
++					"%02x err %d\n", UDCCS0, i);
++stall:
++				/* the watchdog timer helps deal with cases
++				 * where udc seems to clear FST wrongly, and
++				 * then NAKs instead of STALLing.
++				 */
++				ep0start(dev, UDCCS0_FST|UDCCS0_FTF, "stall");
++				start_watchdog(dev);
++				dev->ep0state = EP0_STALL;
++				LED_EP0_OFF;
++
++			/* deferred i/o == no response yet */
++			} else if (dev->req_pending) {
++				if (likely(dev->ep0state == EP0_IN_DATA_PHASE
++						|| dev->req_std || u.r.wLength))
++					ep0start(dev, 0, "defer");
++				else
++					ep0start(dev, UDCCS0_IPR, "defer/IPR");
++			}
++
++			/* expect at least one data or status stage irq */
++			return;
++
++		} else if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA))
++				== (UDCCS0_OPR|UDCCS0_SA))) {
++			unsigned i;
++
++			/* pxa210/250 erratum 131 for B0/B1 says RNE lies.
++			 * still observed on a pxa255 a0.
++			 */
++			DBG(DBG_VERBOSE, "e131\n");
++			nuke(ep, -EPROTO);
++
++			/* read SETUP data, but don't trust it too much */
++			for (i = 0; i < 8; i++)
++				u.raw [i] = (u8) UDDR0;
++			if ((u.r.bRequestType & USB_RECIP_MASK)
++					> USB_RECIP_OTHER)
++				goto stall;
++			if (u.word [0] == 0 && u.word [1] == 0)
++				goto stall;
++			goto got_setup;
++		} else {
++			/* some random early IRQ:
++			 * - we acked FST
++			 * - IPR cleared
++			 * - OPR got set, without SA (likely status stage)
++			 */
++			UDCCS0 = udccs0 & (UDCCS0_SA|UDCCS0_OPR);
++		}
++		break;
++	case EP0_IN_DATA_PHASE:			/* GET_DESCRIPTOR etc */
++		if (udccs0 & UDCCS0_OPR) {
++			UDCCS0 = UDCCS0_OPR|UDCCS0_FTF;
++			DBG(DBG_VERBOSE, "ep0in premature status\n");
++			if (req)
++				done(ep, req, 0);
++			ep0_idle(dev);
++		} else /* irq was IPR clearing */ {
++			if (req) {
++				/* this IN packet might finish the request */
++				(void) write_ep0_fifo(ep, req);
++			} /* else IN token before response was written */
++		}
++		break;
++	case EP0_OUT_DATA_PHASE:		/* SET_DESCRIPTOR etc */
++		if (udccs0 & UDCCS0_OPR) {
++			if (req) {
++				/* this OUT packet might finish the request */
++				if (read_ep0_fifo(ep, req))
++					done(ep, req, 0);
++				/* else more OUT packets expected */
++			} /* else OUT token before read was issued */
++		} else /* irq was IPR clearing */ {
++			DBG(DBG_VERBOSE, "ep0out premature status\n");
++			if (req)
++				done(ep, req, 0);
++			ep0_idle(dev);
++		}
++		break;
++	case EP0_END_XFER:
++		if (req)
++			done(ep, req, 0);
++		/* ack control-IN status (maybe in-zlp was skipped)
++		 * also appears after some config change events.
++		 */
++		if (udccs0 & UDCCS0_OPR)
++			UDCCS0 = UDCCS0_OPR;
++		ep0_idle(dev);
++		break;
++	case EP0_STALL:
++		UDCCS0 = UDCCS0_FST;
++		break;
++	}
++	USIR0 = USIR0_IR0;
++}
++
++static void handle_ep(struct pxa2xx_ep *ep)
++{
++	struct pxa2xx_request	*req;
++	int			is_in = ep->bEndpointAddress & USB_DIR_IN;
++	int			completed;
++	u32			udccs, tmp;
++
++	do {
++		completed = 0;
++		if (likely (!list_empty(&ep->queue)))
++			req = list_entry(ep->queue.next,
++					struct pxa2xx_request, queue);
++		else
++			req = 0;
++
++		// TODO check FST handling
++
++		udccs = *ep->reg_udccs;
++		if (unlikely(is_in)) {	/* irq from TPC, SST, or (ISO) TUR */
++			tmp = UDCCS_BI_TUR;
++			if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK))
++				tmp |= UDCCS_BI_SST;
++			tmp &= udccs;
++			if (likely (tmp))
++				*ep->reg_udccs = tmp;
++			if (req && likely ((udccs & UDCCS_BI_TFS) != 0))
++				completed = write_fifo(ep, req);
++
++		} else {	/* irq from RPC (or for ISO, ROF) */
++			if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK))
++				tmp = UDCCS_BO_SST | UDCCS_BO_DME;
++			else
++				tmp = UDCCS_IO_ROF | UDCCS_IO_DME;
++			tmp &= udccs;
++			if (likely(tmp))
++				*ep->reg_udccs = tmp;
++
++			/* fifos can hold packets, ready for reading... */
++			if (likely(req != 0)) {
++#ifdef USE_OUT_DMA
++// TODO didn't yet debug out-dma.  this approach assumes
++// the worst about short packets and RPC; it might be better.
++
++				if (likely(ep->dma >= 0)) {
++					if (!(udccs & UDCCS_BO_RSP)) {
++						*ep->reg_udccs = UDCCS_BO_RPC;
++						ep->dma_irqs++;
++						return;
++					}
++				}
++#endif
++				completed = read_fifo(ep, req);
++			} else
++				pio_irq_disable (ep->bEndpointAddress);
++		}
++		ep->pio_irqs++;
++	} while (completed);
++}
++
++/*
++ *	pxa2xx_udc_irq - interrupt handler
++ *
++ * avoid delays in ep0 processing. the control handshaking isn't always
++ * under software control (pxa250c0 and the pxa255 are better), and delays
++ * could cause usb protocol errors.
++ */
++static irqreturn_t
++pxa2xx_udc_irq(int irq, void *_dev, struct pt_regs *r)
++{
++	struct pxa2xx_udc	*dev = _dev;
++	int			handled;
++
++	dev->stats.irqs++;
++	HEX_DISPLAY(dev->stats.irqs);
++	do {
++		u32		udccr = UDCCR;
++
++		handled = 0;
++
++		/* SUSpend Interrupt Request */
++		if (unlikely(udccr & UDCCR_SUSIR)) {
++			udc_ack_int_UDCCR(UDCCR_SUSIR);
++			handled = 1;
++			DBG(DBG_VERBOSE, "USB suspend%s\n", is_usb_connected()
++				? "" : "+disconnect");
++
++			if (!is_usb_connected())
++				stop_activity(dev, dev->driver);
++			else if (dev->gadget.speed != USB_SPEED_UNKNOWN
++					&& dev->driver
++					&& dev->driver->suspend)
++				dev->driver->suspend(&dev->gadget);
++			ep0_idle (dev);
++		}
++
++		/* RESume Interrupt Request */
++		if (unlikely(udccr & UDCCR_RESIR)) {
++			udc_ack_int_UDCCR(UDCCR_RESIR);
++			handled = 1;
++			DBG(DBG_VERBOSE, "USB resume\n");
++
++			if (dev->gadget.speed != USB_SPEED_UNKNOWN
++					&& dev->driver
++					&& dev->driver->resume
++					&& is_usb_connected())
++				dev->driver->resume(&dev->gadget);
++		}
++
++		/* ReSeT Interrupt Request - USB reset */
++		if (unlikely(udccr & UDCCR_RSTIR)) {
++			udc_ack_int_UDCCR(UDCCR_RSTIR);
++			handled = 1;
++
++			if ((UDCCR & UDCCR_UDA) == 0) {
++				DBG(DBG_VERBOSE, "USB reset start\n");
++				if (dev->gadget.speed != USB_SPEED_UNKNOWN)
++					disable_disconnect_irq();
++
++				/* reset driver and endpoints,
++				 * in case that's not yet done
++				 */
++				stop_activity (dev, dev->driver);
++
++			} else {
++				INFO("USB reset\n");
++				dev->gadget.speed = USB_SPEED_FULL;
++				LED_CONNECTED_ON;
++				memset(&dev->stats, 0, sizeof dev->stats);
++				/* driver and endpoints are still reset */
++				enable_disconnect_irq();
++			}
++
++		} else {
++			u32	usir0 = USIR0 & ~UICR0;
++			u32	usir1 = USIR1 & ~UICR1;
++			int	i;
++
++			if (unlikely (!usir0 && !usir1))
++				continue;
++
++			DBG(DBG_VERY_NOISY, "irq %02x.%02x\n", usir1, usir0);
++
++			/* control traffic */
++			if (usir0 & USIR0_IR0) {
++				dev->ep[0].pio_irqs++;
++				handle_ep0(dev);
++				handled = 1;
++			}
++
++			/* endpoint data transfers */
++			for (i = 0; i < 8; i++) {
++				u32	tmp = 1 << i;
++
++				if (i && (usir0 & tmp)) {
++					handle_ep(&dev->ep[i]);
++					USIR0 |= tmp;
++					handled = 1;
++				}
++				if (usir1 & tmp) {
++					handle_ep(&dev->ep[i+8]);
++					USIR1 |= tmp;
++					handled = 1;
++				}
++			}
++		}
++
++		/* we could also ask for 1 msec SOF (SIR) interrupts */
++
++	} while (handled);
++	return IRQ_HANDLED;
++}
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ *	cleanup - free resources allocated during init
++ */
++static void /*__exit and */ __init cleanup(void)
++{
++	struct pxa2xx_udc *dev = the_controller;
++
++	if (!dev)
++		return;
++
++	udc_disable(dev);
++	remove_proc_files();
++	usb_gadget_unregister_driver(dev->driver);
++	if (dev->got_irq) {
++		free_irq(IRQ_USB, dev);
++		dev->got_irq = 0;
++	}
++#ifdef	LUBBOCK_USB_DISC_IRQ
++	if (dev->got_disc) {
++		free_irq(LUBBOCK_USB_DISC_IRQ, dev);
++		dev->got_disc = 0;
++	}
++#endif
++	the_controller = 0;
++	release_mem_region(REGISTER_FIRST, REGISTER_LENGTH);
++}
++module_exit (cleanup);
++
++/* this uses load-time allocation and initialization (instead of
++ * doing it at run-time) to save code, eliminate fault paths, and
++ * be more obviously correct.
++ */
++static struct pxa2xx_udc memory = {
++	.gadget = {
++		.ops		= &pxa2xx_udc_ops,
++		.ep0		= &memory.ep[0].ep,
++		.name		= driver_name,
++		.dev = {
++			.bus_id		= "gadget",
++		},
++	},
++
++	/* control endpoint */
++	.ep[0] = {
++		.ep = {
++			.name		= ep0name,
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= EP0_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.reg_udccs	= &UDCCS0,
++		.reg_uddr	= &UDDR0,
++	},
++
++	/* first group of endpoints */
++	.ep[1] = {
++		.ep = {
++			.name		= "ep1in-bulk",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= BULK_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= BULK_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 1,
++		.bmAttributes	= USB_ENDPOINT_XFER_BULK,
++		.reg_udccs	= &UDCCS1,
++		.reg_uddr	= &UDDR1,
++		drcmr (25)
++	},
++	.ep[2] = {
++		.ep = {
++			.name		= "ep2out-bulk",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= BULK_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= BULK_FIFO_SIZE,
++		.bEndpointAddress = 2,
++		.bmAttributes	= USB_ENDPOINT_XFER_BULK,
++		.reg_udccs	= &UDCCS2,
++		.reg_ubcr	= &UBCR2,
++		.reg_uddr	= &UDDR2,
++		drcmr (26)
++	},
++#ifndef CONFIG_USB_PXA2XX_SMALL
++	.ep[3] = {
++		.ep = {
++			.name		= "ep3in-iso",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= ISO_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= ISO_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 3,
++		.bmAttributes	= USB_ENDPOINT_XFER_ISOC,
++		.reg_udccs	= &UDCCS3,
++		.reg_uddr	= &UDDR3,
++		drcmr (27)
++	},
++	.ep[4] = {
++		.ep = {
++			.name		= "ep4out-iso",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= ISO_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= ISO_FIFO_SIZE,
++		.bEndpointAddress = 4,
++		.bmAttributes	= USB_ENDPOINT_XFER_ISOC,
++		.reg_udccs	= &UDCCS4,
++		.reg_ubcr	= &UBCR4,
++		.reg_uddr	= &UDDR4,
++		drcmr (28)
++	},
++	.ep[5] = {
++		.ep = {
++			.name		= "ep5in-int",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= INT_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= INT_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 5,
++		.bmAttributes	= USB_ENDPOINT_XFER_INT,
++		.reg_udccs	= &UDCCS5,
++		.reg_uddr	= &UDDR5,
++	},
++
++	/* second group of endpoints */
++	.ep[6] = {
++		.ep = {
++			.name		= "ep6in-bulk",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= BULK_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= BULK_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 6,
++		.bmAttributes	= USB_ENDPOINT_XFER_BULK,
++		.reg_udccs	= &UDCCS6,
++		.reg_uddr	= &UDDR6,
++		drcmr (30)
++	},
++	.ep[7] = {
++		.ep = {
++			.name		= "ep7out-bulk",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= BULK_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= BULK_FIFO_SIZE,
++		.bEndpointAddress = 7,
++		.bmAttributes	= USB_ENDPOINT_XFER_BULK,
++		.reg_udccs	= &UDCCS7,
++		.reg_ubcr	= &UBCR7,
++		.reg_uddr	= &UDDR7,
++		drcmr (31)
++	},
++	.ep[8] = {
++		.ep = {
++			.name		= "ep8in-iso",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= ISO_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= ISO_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 8,
++		.bmAttributes	= USB_ENDPOINT_XFER_ISOC,
++		.reg_udccs	= &UDCCS8,
++		.reg_uddr	= &UDDR8,
++		drcmr (32)
++	},
++	.ep[9] = {
++		.ep = {
++			.name		= "ep9out-iso",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= ISO_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= ISO_FIFO_SIZE,
++		.bEndpointAddress = 9,
++		.bmAttributes	= USB_ENDPOINT_XFER_ISOC,
++		.reg_udccs	= &UDCCS9,
++		.reg_ubcr	= &UBCR9,
++		.reg_uddr	= &UDDR9,
++		drcmr (33)
++	},
++	.ep[10] = {
++		.ep = {
++			.name		= "ep10in-int",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= INT_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= INT_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 10,
++		.bmAttributes	= USB_ENDPOINT_XFER_INT,
++		.reg_udccs	= &UDCCS10,
++		.reg_uddr	= &UDDR10,
++	},
++
++	/* third group of endpoints */
++	.ep[11] = {
++		.ep = {
++			.name		= "ep11in-bulk",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= BULK_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= BULK_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 11,
++		.bmAttributes	= USB_ENDPOINT_XFER_BULK,
++		.reg_udccs	= &UDCCS11,
++		.reg_uddr	= &UDDR11,
++		drcmr (35)
++	},
++	.ep[12] = {
++		.ep = {
++			.name		= "ep12out-bulk",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= BULK_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= BULK_FIFO_SIZE,
++		.bEndpointAddress = 12,
++		.bmAttributes	= USB_ENDPOINT_XFER_BULK,
++		.reg_udccs	= &UDCCS12,
++		.reg_ubcr	= &UBCR12,
++		.reg_uddr	= &UDDR12,
++		drcmr (36)
++	},
++	.ep[13] = {
++		.ep = {
++			.name		= "ep13in-iso",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= ISO_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= ISO_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 13,
++		.bmAttributes	= USB_ENDPOINT_XFER_ISOC,
++		.reg_udccs	= &UDCCS13,
++		.reg_uddr	= &UDDR13,
++		drcmr (37)
++	},
++	.ep[14] = {
++		.ep = {
++			.name		= "ep14out-iso",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= ISO_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= ISO_FIFO_SIZE,
++		.bEndpointAddress = 14,
++		.bmAttributes	= USB_ENDPOINT_XFER_ISOC,
++		.reg_udccs	= &UDCCS14,
++		.reg_ubcr	= &UBCR14,
++		.reg_uddr	= &UDDR14,
++		drcmr (38)
++	},
++	.ep[15] = {
++		.ep = {
++			.name		= "ep15in-int",
++			.ops		= &pxa2xx_ep_ops,
++			.maxpacket	= INT_FIFO_SIZE,
++		},
++		.dev		= &memory,
++		.fifo_size	= INT_FIFO_SIZE,
++		.bEndpointAddress = USB_DIR_IN | 15,
++		.bmAttributes	= USB_ENDPOINT_XFER_INT,
++		.reg_udccs	= &UDCCS15,
++		.reg_uddr	= &UDDR15,
++	},
++#endif /* !CONFIG_USB_PXA2XX_SMALL */
++};
++
++#define CP15R0_VENDOR_MASK	0xffffe000
++
++#if	defined(CONFIG_ARCH_PXA)
++#define CP15R0_XSCALE_VALUE	0x69052000	/* intel/arm/xscale */
++
++#elif	defined(CONFIG_ARCH_IXP425)
++#define CP15R0_XSCALE_VALUE	0x69054000	/* intel/arm/ixp425 */
++
++#endif
++
++#define CP15R0_PROD_MASK	0x000003f0
++#define PXA25x			0x00000100	/* and PXA26x */
++#define PXA210			0x00000120
++
++#define CP15R0_REV_MASK		0x0000000f
++
++#define CP15R0_PRODREV_MASK	(CP15R0_PROD_MASK | CP15R0_REV_MASK)
++
++#define PXA255_A0		0x00000106	/* or PXA260_B1 */
++#define PXA250_C0		0x00000105	/* or PXA26x_B0 */
++#define PXA250_B2		0x00000104
++#define PXA250_B1		0x00000103	/* or PXA260_A0 */
++#define PXA250_B0		0x00000102
++#define PXA250_A1		0x00000101
++#define PXA250_A0		0x00000100
++
++#define PXA210_C0		0x00000125
++#define PXA210_B2		0x00000124
++#define PXA210_B1		0x00000123
++#define PXA210_B0		0x00000122
++
++#define IXP425_A0		0x000001c1
++
++/*
++ * 	init - allocate resources
++ */
++static int __init init(void)
++{
++	struct pxa2xx_udc *dev;
++	int retval, out_dma = 1;
++	u32 chiprev;
++
++	printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION);
++
++	/* insist on Intel/ARM/XScale */
++	asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev));
++	if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) {
++		printk(KERN_ERR "%s: not XScale!\n", driver_name);
++		return -ENODEV;
++	}
++
++	/* allocate resources */
++	if (!request_mem_region(REGISTER_FIRST, REGISTER_LENGTH, driver_name))
++		return -EBUSY;
++
++	/* initialize data */
++	dev = &memory;
++
++	init_timer(&dev->timer);
++	dev->timer.function = udc_watchdog;
++	dev->timer.data = (unsigned long) dev;
++
++	/* trigger chiprev-specific logic */
++	switch (chiprev & CP15R0_PRODREV_MASK) {
++#if	defined(CONFIG_ARCH_PXA)
++	case PXA255_A0:
++		dev->has_cfr = 1;
++		break;
++	case PXA250_A0:
++	case PXA250_A1:
++		/* A0/A1 "not released"; ep 13, 15 unusable */
++		/* fall through */
++	case PXA250_B2: case PXA210_B2:
++	case PXA250_B1: case PXA210_B1:
++	case PXA250_B0: case PXA210_B0:
++		out_dma = 0;
++		/* fall through */
++	case PXA250_C0: case PXA210_C0:
++		break;
++#elif	defined(CONFIG_ARCH_IXP425)
++	case IXP425_A0:
++		out_dma = 0;
++		break;
++#endif
++	default:
++		out_dma = 0;
++		printk(KERN_ERR "%s: unrecognized processor: %08x\n",
++			driver_name, chiprev);
++		return -ENODEV;
++	}
++
++	pr_debug("%s: IRQ %d%s%s%s\n", driver_name, IRQ_USB,
++		dev->has_cfr ? "" : " (!cfr)",
++		out_dma ? "" : " (broken dma-out)",
++		SIZE_STR DMASTR
++		);
++
++#ifdef	USE_DMA
++#ifndef	USE_OUT_DMA
++	out_dma = 0;
++#endif
++	/* pxa 250 erratum 130 prevents using OUT dma (fixed C0) */
++	if (!out_dma) {
++		DMSG("disabled OUT dma\n");
++		dev->ep[ 2].reg_drcmr = dev->ep[ 4].reg_drcmr = 0;
++		dev->ep[ 7].reg_drcmr = dev->ep[ 9].reg_drcmr = 0;
++		dev->ep[12].reg_drcmr = dev->ep[14].reg_drcmr = 0;
++	}
++#endif
++
++	the_controller = dev;
++	udc_disable(dev);
++	udc_reinit(dev);
++
++	/* irq setup after old hardware state is cleaned up */
++	retval = request_irq(IRQ_USB, pxa2xx_udc_irq,
++			SA_INTERRUPT, driver_name, dev);
++	if (retval != 0) {
++		printk(KERN_ERR "%s: can't get irq %i, err %d\n",
++			driver_name, IRQ_USB, retval);
++		return -EBUSY;
++	}
++	dev->got_irq = 1;
++
++#ifdef LUBBOCK_USB_DISC_IRQ
++	if (machine_is_lubbock()) {
++		disable_irq(LUBBOCK_USB_DISC_IRQ);
++		retval = request_irq(LUBBOCK_USB_DISC_IRQ,
++				usb_connection_irq,
++				SA_INTERRUPT | SA_SAMPLE_RANDOM,
++				driver_name, dev);
++		if (retval != 0) {
++			enable_irq(LUBBOCK_USB_DISC_IRQ);
++			printk(KERN_ERR "%s: can't get irq %i, err %d\n",
++				driver_name, LUBBOCK_USB_DISC_IRQ, retval);
++			cleanup();
++			return retval;
++		}
++		dev->got_disc = 1;
++	}
++#endif
++
++	create_proc_files();
++	return 0;
++}
++module_init (init);
++
++MODULE_DESCRIPTION(DRIVER_DESC);
++MODULE_AUTHOR("Frank Becker, Robert Schwebel, David Brownell");
++MODULE_LICENSE("GPL");
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/pxa2xx_udc.h kernel/drivers/usb/gadget/pxa2xx_udc.h
+--- /tmp/kernel/drivers/usb/gadget/pxa2xx_udc.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/pxa2xx_udc.h	2005-04-22 17:53:19.496529422 +0200
+@@ -0,0 +1,528 @@
++/*
++ * linux/drivers/usb/gadget/pxa2xx_udc.h
++ * Intel PXA2xx on-chip full speed USB device controller
++ * 
++ * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
++ * Copyright (C) 2003 David Brownell
++ * Copyright (C) 2003 Joshua Wise
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++#ifndef __LINUX_USB_GADGET_PXA2XX_H
++#define __LINUX_USB_GADGET_PXA2XX_H
++
++#include <linux/types.h>
++
++/*-------------------------------------------------------------------------*/
++
++/* pxa2xx has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
++#define UFNRH_SIR	(1 << 7)	/* SOF interrupt request */
++#define UFNRH_SIM	(1 << 6)	/* SOF interrupt mask */
++#define UFNRH_IPE14	(1 << 5)	/* ISO packet error, ep14 */
++#define UFNRH_IPE9	(1 << 4)	/* ISO packet error, ep9 */
++#define UFNRH_IPE4	(1 << 3)	/* ISO packet error, ep4 */
++
++/* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
++#define	UDCCFR		UDC_RES2	/* UDC Control Function Register */
++#define UDCCFR_AREN	(1 << 7)	/* ACK response enable (now) */
++#define UDCCFR_ACM	(1 << 2)	/* ACK control mode (wait for AREN) */
++
++/* for address space reservation */
++#define	REGISTER_FIRST	((unsigned long)(&UDCCR))
++#define	REGISTER_LAST	((unsigned long)(&UDDR14))	/* not UDDR15! */
++#define REGISTER_LENGTH	((REGISTER_LAST - REGISTER_FIRST) + 4)
++
++/*-------------------------------------------------------------------------*/
++
++struct pxa2xx_udc;
++
++struct pxa2xx_ep {
++	struct usb_ep				ep;
++	struct pxa2xx_udc			*dev;
++
++	const struct usb_endpoint_descriptor	*desc;
++	struct list_head			queue;
++	unsigned long				pio_irqs;
++	unsigned long				dma_irqs;
++	short					dma; 
++
++	unsigned short				fifo_size;
++	u8					bEndpointAddress;
++	u8					bmAttributes;
++
++	unsigned				stopped : 1;
++	unsigned				dma_fixup : 1;
++							 
++	/* UDCCS = UDC Control/Status for this EP
++	 * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
++	 * UDDR = UDC Endpoint Data Register (the fifo)
++	 * DRCM = DMA Request Channel Map
++	 */
++	volatile u32				*reg_udccs;
++	volatile u32				*reg_ubcr;
++	volatile u32				*reg_uddr;
++#ifdef USE_DMA
++	volatile u32				*reg_drcmr;
++#define	drcmr(n)  .reg_drcmr = & DRCMR ## n ,
++#else
++#define	drcmr(n)  
++#endif
++};
++
++struct pxa2xx_request {
++	struct usb_request			req;
++	struct list_head			queue;
++};
++
++enum ep0_state { 
++	EP0_IDLE,
++	EP0_IN_DATA_PHASE,
++	EP0_OUT_DATA_PHASE,
++	EP0_END_XFER,
++	EP0_STALL,
++};
++
++#define EP0_FIFO_SIZE	((unsigned)16)
++#define BULK_FIFO_SIZE	((unsigned)64)
++#define ISO_FIFO_SIZE	((unsigned)256)
++#define INT_FIFO_SIZE	((unsigned)8)
++
++struct udc_stats {
++	struct ep0stats {
++		unsigned long		ops;
++		unsigned long		bytes;
++	} read, write;
++	unsigned long			irqs;
++};
++
++#ifdef CONFIG_USB_PXA2XX_SMALL
++/* when memory's tight, SMALL config saves code+data.  */
++#undef	USE_DMA
++#define	PXA_UDC_NUM_ENDPOINTS	3
++#endif
++
++#ifndef	PXA_UDC_NUM_ENDPOINTS
++#define	PXA_UDC_NUM_ENDPOINTS	16
++#endif
++
++struct pxa2xx_udc {
++	struct usb_gadget			gadget;
++	struct usb_gadget_driver		*driver;
++
++	enum ep0_state				ep0state;
++	struct udc_stats			stats;
++	unsigned				got_irq : 1,
++						got_disc : 1,
++						has_cfr : 1,
++						req_pending : 1,
++						req_std : 1,
++						req_config : 1;
++
++#define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
++	struct timer_list			timer;
++
++	struct pxa2xx_ep			ep [PXA_UDC_NUM_ENDPOINTS];
++};
++
++/* 2.5 changes ... */
++
++#ifndef container_of
++#define container_of    list_entry
++#endif
++
++#ifndef WARN_ON
++#define WARN_ON BUG_ON
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++/* please keep machine-specific defines in alphabetical order. */
++
++// CONFIG_ARCH_ADI_COYOTE behaves
++
++#ifdef CONFIG_ARCH_E7XX
++#  include <asm/arch/e7xx-gpio.h>
++#endif
++
++#ifdef CONFIG_ARCH_H1900
++#  include <asm/arch/h1900-gpio.h>
++#endif
++
++#ifdef CONFIG_ARCH_H3900
++#  include <asm/arch/h3900-gpio.h>
++#endif
++
++#ifdef CONFIG_ARCH_H5400
++#  include <asm/arch/h5400-gpio.h>
++#endif
++
++#ifdef CONFIG_ARCH_INNOKOM
++#include <asm/arch/innokom.h>
++#endif
++
++#ifdef CONFIG_ARCH_LUBBOCK
++#include <asm/arch/lubbock.h>
++/* lubbock can also report usb connect/disconnect irqs */
++
++#ifdef DEBUG
++#define HEX_DISPLAY(n)	if (machine_is_lubbock()) { LUB_HEXLED = (n); }
++
++#define LED_CONNECTED_ON	if (machine_is_lubbock()) { \
++	DISCRETE_LED_ON(D26); }
++#define LED_CONNECTED_OFF	if(machine_is_lubbock()) { \
++	DISCRETE_LED_OFF(D26); LUB_HEXLED = 0; }
++#define LED_EP0_ON	if (machine_is_lubbock()) { DISCRETE_LED_ON(D25); }
++#define LED_EP0_OFF	if (machine_is_lubbock()) { DISCRETE_LED_OFF(D25); }
++#endif /* DEBUG */
++
++#endif
++
++#ifdef CONFIG_ARCH_PXA_CORGI
++/* Sharp Zaurus C-700, C-750, C-760, C-860 */
++#define	CORGI_CONNECT_GPIO	45
++/* use the ARM-Linux registered symbol, not a Lineo-private one */
++#define CONFIG_MACH_CORGI
++#endif
++
++#ifdef CONFIG_ARCH_PXA_POODLE
++/* Sharp B-500, SL-5600 */
++#define	POODLE_CONNECT_GPIO	20
++/* use the ARM-Linux registered symbol, not a Lineo-private one */
++#define CONFIG_MACH_POODLE
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++/* LEDs are only for debug */
++#ifndef HEX_DISPLAY
++#define HEX_DISPLAY(n)		do {} while(0)
++#endif
++
++#ifndef LED_CONNECTED_ON
++#define LED_CONNECTED_ON	do {} while(0)
++#define LED_CONNECTED_OFF	do {} while(0)
++#endif
++#ifndef LED_EP0_ON
++#define LED_EP0_ON		do {} while (0)
++#define LED_EP0_OFF		do {} while (0)
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++static struct pxa2xx_udc *the_controller;
++
++/* one GPIO should be used to detect host disconnect */
++static int is_usb_connected(void)
++{
++	static int first = 0;
++	
++	// CONFIG_ARCH_ADI_COYOTE cannot detect or force disconnect
++#ifdef CONFIG_ARCH_E7XX
++	if (machine_is_e7xx())
++		return (GPLR(GPIO_E7XX_USB_DISC)
++				& GPIO_bit(GPIO_E7XX_USB_DISC));
++#endif
++#if 0
++#ifdef CONFIG_ARCH_H1900
++	if (machine_is_h1900())
++		return (!(GPLR(GPIO_NR_H1900_USB_DETECT_N)
++				& GPIO_bit(GPIO_NR_H1900_USB_DETECT_N)));
++#endif
++#ifdef CONFIG_ARCH_H3900
++	if (machine_is_h3900())
++		return 1;
++#endif
++#ifdef CONFIG_ARCH_H5400
++	// h5400 ... ?
++#endif
++#endif
++#ifdef CONFIG_ARCH_INNOKOM
++	if (machine_is_innokom())
++		return (GPLR(GPIO_INNOKOM_USB_DISC)
++				& GPIO_bit(GPIO_INNOKOM_USB_DISC));
++#endif
++#ifdef CONFIG_ARCH_LUBBOCK
++	if (machine_is_lubbock())
++		return ((LUB_MISC_RD & (1 << 9)) == 0);
++#endif
++	// Sharp's sources didn't show a corgi or poodle hook
++
++	if (!first) {
++		pr_info("%s: can't check host connect\n", driver_name);
++		first++;
++	}
++	return 1;
++}
++
++static int disc_first = 0;
++
++/* one GPIO should force the host to see this device (or not) */
++static void make_usb_disappear(void)
++{
++	// CONFIG_ARCH_ADI_COYOTE cannot detect or force disconnect
++#ifdef CONFIG_ARCH_E7XX
++	if (machine_is_e7xx()) {
++		GPSR(GPIO_E7XX_USB_PULLUP) = GPIO_bit(GPIO_E7XX_USB_PULLUP);
++		return;
++	}
++#endif
++	// h1900 ... ?
++#ifdef CONFIG_ARCH_H3900
++	if (machine_is_h3900()) {
++		GPDR0 &= ~GPIO_H3900_USBP_PULLUP;
++		return;
++	}
++#endif
++#ifdef CONFIG_ARCH_H5400
++	if (machine_is_h5400()) {
++		GPDR(GPIO_NR_H5400_USB_PULLUP) &=
++					~GPIO_bit(GPIO_NR_H5400_USB_PULLUP);
++		return;
++	}
++#endif
++#ifdef CONFIG_ARCH_INNOKOM
++	if (machine_is_innokom()) {
++		GPSR(GPIO_INNOKOM_USB_ONOFF) = GPIO_bit(GPIO_INNOKOM_USB_ONOFF);
++		printk("innokom: disappear\n");
++		udelay(5);
++		return;
++	}
++#endif
++#ifdef CONFIG_ARCH_CSB226
++	if (machine_is_csb226()) {
++		GPCR0 |= 0x00000080;
++		printk("csb226: disappear\n");
++		udelay(5);
++		return;
++	}
++#endif
++	// lubbock has no D+ pullup
++#ifdef CONFIG_MACH_CORGI
++	if (machine_is_corgi()) {
++		GPDR(CORGI_CONNECT_GPIO) |= GPIO_bit(CORGI_CONNECT_GPIO);
++		GPCR(CORGI_CONNECT_GPIO) = GPIO_bit(CORGI_CONNECT_GPIO);
++	}
++#endif
++#ifdef CONFIG_MACH_POODLE
++	if (machine_is_poodle()) {
++		GPDR(POODLE_CONNECT_GPIO) |= GPIO_bit(POODLE_CONNECT_GPIO);
++		GPCR(POODLE_CONNECT_GPIO) = GPIO_bit(POODLE_CONNECT_GPIO);
++	}
++#endif
++
++	if (!disc_first) {
++		pr_info("%s: can't force usb disconnect\n", driver_name);
++		disc_first++;
++	}
++}
++
++static void let_usb_appear(void)
++{
++	// CONFIG_ARCH_ADI_COYOTE cannot detect or force disconnect
++#ifdef CONFIG_ARCH_E7XX
++	if (machine_is_e7xx()) {
++		GPCR(GPIO_E7XX_USB_PULLUP) = GPIO_bit(GPIO_E7XX_USB_PULLUP);
++		return;
++	}
++#endif
++	// h1900 ... ?
++#ifdef CONFIG_ARCH_H3900
++	if (machine_is_h3900()) {
++		GPDR0 |= GPIO_H3900_USBP_PULLUP;
++		GPSR0 |= GPIO_H3900_USBP_PULLUP;
++		return;
++	}
++#endif
++#ifdef CONFIG_ARCH_H5400
++	if (machine_is_h5400()) {
++		GPDR(GPIO_NR_H5400_USB_PULLUP) |=
++					GPIO_bit(GPIO_NR_H5400_USB_PULLUP);
++		return;
++	}
++#endif
++#ifdef CONFIG_ARCH_INNOKOM
++	if (machine_is_innokom()) {
++		GPCR(GPIO_INNOKOM_USB_ONOFF) = GPIO_bit(GPIO_INNOKOM_USB_ONOFF);
++		printk("innokom: appear\n");
++		udelay(5);
++		return;
++	}
++#endif
++#ifdef CONFIG_ARCH_CSB226
++	if (machine_is_csb226()) {
++		GPDR0 |= 0x00000080;
++		GPSR0 |= 0x00000080;
++		printk("csb226: appear\n");
++		udelay(5);
++		return;
++	}
++#endif
++	// lubbock has no D+ pullup
++#ifdef CONFIG_MACH_CORGI
++	if (machine_is_corgi()) {
++		GPDR(CORGI_CONNECT_GPIO) |= GPIO_bit(CORGI_CONNECT_GPIO);
++		GPSR(CORGI_CONNECT_GPIO) = GPIO_bit(CORGI_CONNECT_GPIO);
++	}
++#endif
++#ifdef CONFIG_MACH_POODLE
++	if (machine_is_poodle()) {
++		GPDR(POODLE_CONNECT_GPIO) |= GPIO_bit(POODLE_CONNECT_GPIO);
++		GPSR(POODLE_CONNECT_GPIO) = GPIO_bit(POODLE_CONNECT_GPIO);
++	}
++#endif
++
++	if (!disc_first) {
++		pr_info("%s: can't force usb disconnect\n", driver_name);
++		disc_first++;
++	}
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* LEDs are only for debug */
++#ifndef LED_CONNECTED_ON
++#define LED_CONNECTED_ON	do {} while(0)
++#define LED_CONNECTED_OFF	do {} while(0)
++#endif
++#ifndef LED_EP0_ON
++#define LED_EP0_ON		do {} while (0)
++#define LED_EP0_OFF		do {} while (0)
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * Debugging support vanishes in non-debug builds.  DBG_NORMAL should be
++ * mostly silent during normal use/testing, with no timing side-effects.
++ */
++#define DBG_NORMAL	1	/* error paths, device state transitions */
++#define DBG_VERBOSE	2	/* add some success path trace info */
++#define DBG_NOISY	3	/* ... even more: request level */
++#define DBG_VERY_NOISY	4	/* ... even more: packet level */
++
++#ifdef DEBUG
++
++static const char *state_name[] = {
++	"EP0_IDLE",
++	"EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
++	"EP0_END_XFER", "EP0_STALL"
++};
++
++#define DMSG(stuff...) printk(KERN_DEBUG "udc: " stuff)
++
++#ifdef VERBOSE
++#    define UDC_DEBUG DBG_VERBOSE
++#else
++#    define UDC_DEBUG DBG_NORMAL
++#endif
++
++static void __attribute__ ((__unused__))
++dump_udccr(const char *label)
++{
++	u32	udccr = UDCCR;
++	DMSG("%s %02X =%s%s%s%s%s%s%s%s\n",
++		label, udccr,
++		(udccr & UDCCR_REM) ? " rem" : "",
++		(udccr & UDCCR_RSTIR) ? " rstir" : "",
++		(udccr & UDCCR_SRM) ? " srm" : "",
++		(udccr & UDCCR_SUSIR) ? " susir" : "",
++		(udccr & UDCCR_RESIR) ? " resir" : "",
++		(udccr & UDCCR_RSM) ? " rsm" : "",
++		(udccr & UDCCR_UDA) ? " uda" : "",
++		(udccr & UDCCR_UDE) ? " ude" : "");
++}
++
++static void __attribute__ ((__unused__))
++dump_udccs0(const char *label)
++{
++	u32		udccs0 = UDCCS0;
++
++	DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n",
++		label, state_name[the_controller->ep0state], udccs0,
++		(udccs0 & UDCCS0_SA) ? " sa" : "",
++		(udccs0 & UDCCS0_RNE) ? " rne" : "",
++		(udccs0 & UDCCS0_FST) ? " fst" : "",
++		(udccs0 & UDCCS0_SST) ? " sst" : "",
++		(udccs0 & UDCCS0_DRWF) ? " dwrf" : "",
++		(udccs0 & UDCCS0_FTF) ? " ftf" : "",
++		(udccs0 & UDCCS0_IPR) ? " ipr" : "",
++		(udccs0 & UDCCS0_OPR) ? " opr" : "");
++}
++
++static void __attribute__ ((__unused__))
++dump_state(struct pxa2xx_udc *dev)
++{
++	u32		tmp;
++	unsigned	i;
++
++	DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
++		is_usb_connected() ? "host " : "disconnected",
++		state_name[dev->ep0state],
++		UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
++	dump_udccr("udccr");
++	if (dev->has_cfr) {
++		tmp = UDCCFR;
++		DMSG("udccfr %02X =%s%s\n", tmp,
++			(tmp & UDCCFR_AREN) ? " aren" : "",
++			(tmp & UDCCFR_ACM) ? " acm" : "");
++	}
++
++	if (!dev->driver) {
++		DMSG("no gadget driver bound\n");
++		return;
++	} else
++		DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
++	
++	if (!is_usb_connected())
++		return;
++
++	dump_udccs0 ("udccs0");
++	DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
++		dev->stats.write.bytes, dev->stats.write.ops,
++		dev->stats.read.bytes, dev->stats.read.ops);
++
++	for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) {
++		if (dev->ep [i].desc == 0)
++			continue;
++		DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs);
++	}
++}
++
++#else
++
++#define DMSG(stuff...)		do{}while(0)
++
++#define	dump_udccr(x)	do{}while(0)
++#define	dump_udccs0(x)	do{}while(0)
++#define	dump_state(x)	do{}while(0)
++
++#define UDC_DEBUG ((unsigned)0)
++
++#endif
++
++#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
++
++#define WARN(stuff...) printk(KERN_WARNING "udc: " stuff)
++#define INFO(stuff...) printk(KERN_INFO "udc: " stuff)
++
++
++/* 2.4 backport support */
++#define irqreturn_t	void
++#define	IRQ_HANDLED
++
++
++#endif /* __LINUX_USB_GADGET_PXA2XX_H */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/rndis.c kernel/drivers/usb/gadget/rndis.c
+--- /tmp/kernel/drivers/usb/gadget/rndis.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/rndis.c	2005-04-22 17:53:19.501528608 +0200
+@@ -0,0 +1,1425 @@
++/* 
++ * RNDIS MSG parser
++ * 
++ * Version:     $Id: rndis.c,v 1.19 2004/03/25 21:33:46 robert Exp $
++ * 
++ * Authors:	Benedikt Spranger, Pengutronix
++ * 		Robert Schwebel, Pengutronix
++ * 
++ *              This program is free software; you can redistribute it and/or
++ *              modify it under the terms of the GNU General Public License
++ *              version 2, as published by the Free Software Foundation. 
++ * 
++ *		This software was originally developed in conformance with
++ *		Microsoft's Remote NDIS Specification License Agreement.
++ *              
++ * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
++ *		Fixed message length bug in init_response
++ * 
++ * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
++ * 		Fixed rndis_rm_hdr length bug.
++ *
++ * Copyright (C) 2004 by David Brownell
++ *		updates to merge with Linux 2.6, better match RNDIS spec
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/version.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/proc_fs.h>
++#include <linux/netdevice.h>
++
++#include <asm/io.h>
++#include <asm/byteorder.h>
++#include <asm/system.h>
++
++
++#undef	RNDIS_PM
++#undef	VERBOSE
++
++#include "rndis.h"
++
++
++/* The driver for your USB chip needs to support ep0 OUT to work with
++ * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
++ *
++ * Windows hosts need an INF file like Documentation/usb/linux.inf
++ * and will be happier if you provide the host_addr module parameter.
++ */
++
++#if 0
++#define DEBUG(str,args...) do { \
++	if (rndis_debug) \
++		printk(KERN_DEBUG str , ## args ); \
++	} while (0)
++static int rndis_debug = 0;
++
++module_param (rndis_debug, bool, 0);
++MODULE_PARM_DESC (rndis_debug, "enable debugging");
++
++#else
++
++#define rndis_debug		0
++#define DEBUG(str,args...)	do{}while(0)
++#endif
++
++#define RNDIS_MAX_CONFIGS	1
++
++
++static rndis_params rndis_per_dev_params [RNDIS_MAX_CONFIGS];
++
++/* Driver Version */
++static const u32 rndis_driver_version = __constant_cpu_to_le32 (1);
++
++/* Function Prototypes */
++static int rndis_init_response (int configNr, rndis_init_msg_type *buf);
++static int rndis_query_response (int configNr, rndis_query_msg_type *buf);
++static int rndis_set_response (int configNr, rndis_set_msg_type *buf);
++static int rndis_reset_response (int configNr, rndis_reset_msg_type *buf);
++static int rndis_keepalive_response (int configNr, 
++				     rndis_keepalive_msg_type *buf);
++
++static rndis_resp_t *rndis_add_response (int configNr, u32 length);
++
++
++/* NDIS Functions */
++static int gen_ndis_query_resp (int configNr, u32 OID, rndis_resp_t *r)
++{
++	int 			retval = -ENOTSUPP;
++	u32 			length = 0;
++	u32			*tmp;
++	int			i, count;
++	rndis_query_cmplt_type	*resp;
++
++	if (!r) return -ENOMEM;
++	resp = (rndis_query_cmplt_type *) r->buf;
++
++	if (!resp) return -ENOMEM;
++	
++	switch (OID) {
++
++	/* general oids (table 4-1) */
++
++	/* mandatory */
++	case OID_GEN_SUPPORTED_LIST:
++		DEBUG ("%s: OID_GEN_SUPPORTED_LIST\n", __FUNCTION__);
++		length = sizeof (oid_supported_list);
++		count  = length / sizeof (u32);
++		tmp = (u32 *) ((u8 *)resp + 24);
++		for (i = 0; i < count; i++)
++			tmp[i] = cpu_to_le32 (oid_supported_list[i]);
++		retval = 0;
++		break;
++		
++	/* mandatory */
++	case OID_GEN_HARDWARE_STATUS:
++		DEBUG("%s: OID_GEN_HARDWARE_STATUS\n", __FUNCTION__);
++		length = 4;
++		/* Bogus question! 
++		 * Hardware must be ready to receive high level protocols.
++		 * BTW: 
++		 * reddite ergo quae sunt Caesaris Caesari
++		 * et quae sunt Dei Deo!
++		 */
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		retval = 0;
++		break;
++		
++	/* mandatory */
++	case OID_GEN_MEDIA_SUPPORTED:
++		DEBUG("%s: OID_GEN_MEDIA_SUPPORTED\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = cpu_to_le32 (
++					rndis_per_dev_params [configNr].medium);
++		retval = 0;
++		break;
++		
++	/* mandatory */
++	case OID_GEN_MEDIA_IN_USE:
++		DEBUG("%s: OID_GEN_MEDIA_IN_USE\n", __FUNCTION__);
++		length = 4;
++		/* one medium, one transport... (maybe you do it better) */
++		*((u32 *) resp + 6) = cpu_to_le32 (
++					rndis_per_dev_params [configNr].medium);
++		retval = 0;
++		break;
++		
++	/* mandatory */
++	case OID_GEN_MAXIMUM_FRAME_SIZE:
++		DEBUG("%s: OID_GEN_MAXIMUM_FRAME_SIZE\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].dev) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr].dev->mtu);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_GEN_LINK_SPEED:
++		DEBUG("%s: OID_GEN_LINK_SPEED\n", __FUNCTION__);
++		length = 4;
++		if (rndis_per_dev_params [configNr].media_state
++			== NDIS_MEDIA_STATE_DISCONNECTED)
++		    *((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		else
++		    *((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr].speed);
++		retval = 0;
++		break;
++
++	/* mandatory */
++	case OID_GEN_TRANSMIT_BLOCK_SIZE:
++		DEBUG("%s: OID_GEN_TRANSMIT_BLOCK_SIZE\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].dev) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr].dev->mtu);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_GEN_RECEIVE_BLOCK_SIZE:
++		DEBUG("%s: OID_GEN_RECEIVE_BLOCK_SIZE\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].dev) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr].dev->mtu);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_GEN_VENDOR_ID:
++		DEBUG("%s: OID_GEN_VENDOR_ID\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = cpu_to_le32 (
++			rndis_per_dev_params [configNr].vendorID);
++		retval = 0;
++		break;
++		
++	/* mandatory */
++	case OID_GEN_VENDOR_DESCRIPTION:
++		DEBUG("%s: OID_GEN_VENDOR_DESCRIPTION\n", __FUNCTION__);
++		length = strlen (rndis_per_dev_params [configNr].vendorDescr);
++		memcpy ((u8 *) resp + 24, 
++			rndis_per_dev_params [configNr].vendorDescr, length);
++		retval = 0;
++		break;
++
++	case OID_GEN_VENDOR_DRIVER_VERSION:
++		DEBUG("%s: OID_GEN_VENDOR_DRIVER_VERSION\n", __FUNCTION__);
++		length = 4;
++		/* Created as LE */
++		*((u32 *) resp + 6) = rndis_driver_version;
++		retval = 0;
++		break;
++
++	/* mandatory */
++	case OID_GEN_CURRENT_PACKET_FILTER:
++		DEBUG("%s: OID_GEN_CURRENT_PACKET_FILTER\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = cpu_to_le32 (
++					rndis_per_dev_params[configNr].filter);
++		retval = 0;
++		break;
++
++	/* mandatory */
++	case OID_GEN_MAXIMUM_TOTAL_SIZE:
++		DEBUG("%s: OID_GEN_MAXIMUM_TOTAL_SIZE\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = __constant_cpu_to_le32(
++					RNDIS_MAX_TOTAL_SIZE);
++		retval = 0;
++		break;
++
++	/* mandatory */
++	case OID_GEN_MEDIA_CONNECT_STATUS:
++		DEBUG("%s: OID_GEN_MEDIA_CONNECT_STATUS\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = cpu_to_le32 (
++					rndis_per_dev_params [configNr]
++						.media_state);
++		retval = 0;
++		break;
++
++	case OID_GEN_PHYSICAL_MEDIUM:
++		DEBUG("%s: OID_GEN_PHYSICAL_MEDIUM\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		retval = 0;
++		break;
++
++	/* The RNDIS specification is incomplete/wrong.   Some versions
++	 * of MS-Windows expect OIDs that aren't specified there.  Other
++	 * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
++	 */
++	case OID_GEN_MAC_OPTIONS:		/* from WinME */
++		DEBUG("%s: OID_GEN_MAC_OPTIONS\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = __constant_cpu_to_le32(
++			  NDIS_MAC_OPTION_RECEIVE_SERIALIZED
++			| NDIS_MAC_OPTION_FULL_DUPLEX);
++		retval = 0;
++		break;
++
++	/* statistics OIDs (table 4-2) */
++
++	/* mandatory */
++	case OID_GEN_XMIT_OK:
++		DEBUG("%s: OID_GEN_XMIT_OK\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++			    rndis_per_dev_params [configNr].stats->tx_packets - 
++			    rndis_per_dev_params [configNr].stats->tx_errors -
++			    rndis_per_dev_params [configNr].stats->tx_dropped);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++
++	/* mandatory */
++	case OID_GEN_RCV_OK:
++		DEBUG("%s: OID_GEN_RCV_OK\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++			    rndis_per_dev_params [configNr].stats->rx_packets - 
++			    rndis_per_dev_params [configNr].stats->rx_errors -
++			    rndis_per_dev_params [configNr].stats->rx_dropped);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_GEN_XMIT_ERROR:
++		DEBUG("%s: OID_GEN_XMIT_ERROR\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->tx_errors);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_GEN_RCV_ERROR:
++		DEBUG("%s: OID_GEN_RCV_ERROR\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->rx_errors);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_GEN_RCV_NO_BUFFER:
++		DEBUG("%s: OID_GEN_RCV_NO_BUFFER\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->rx_dropped);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++
++#ifdef	RNDIS_OPTIONAL_STATS
++	case OID_GEN_DIRECTED_BYTES_XMIT:
++		DEBUG("%s: OID_GEN_DIRECTED_BYTES_XMIT\n", __FUNCTION__);
++		/* 
++		 * Aunt Tilly's size of shoes
++		 * minus antarctica count of penguins
++		 * divided by weight of Alpha Centauri
++		 */
++		if (rndis_per_dev_params [configNr].stats) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				(rndis_per_dev_params [configNr]
++					.stats->tx_packets - 
++				 rndis_per_dev_params [configNr]
++					 .stats->tx_errors -
++				 rndis_per_dev_params [configNr]
++					 .stats->tx_dropped)
++				* 123);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_DIRECTED_FRAMES_XMIT:
++		DEBUG("%s: OID_GEN_DIRECTED_FRAMES_XMIT\n", __FUNCTION__);
++		/* dito */
++		if (rndis_per_dev_params [configNr].stats) {
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				(rndis_per_dev_params [configNr]
++					.stats->tx_packets - 
++				 rndis_per_dev_params [configNr]
++					 .stats->tx_errors -
++				 rndis_per_dev_params [configNr]
++					 .stats->tx_dropped)
++				/ 123);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_MULTICAST_BYTES_XMIT:
++		DEBUG("%s: OID_GEN_MULTICAST_BYTES_XMIT\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->multicast*1234);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_MULTICAST_FRAMES_XMIT:
++		DEBUG("%s: OID_GEN_MULTICAST_FRAMES_XMIT\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->multicast);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_BROADCAST_BYTES_XMIT:
++		DEBUG("%s: OID_GEN_BROADCAST_BYTES_XMIT\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->tx_packets/42*255);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_BROADCAST_FRAMES_XMIT:
++		DEBUG("%s: OID_GEN_BROADCAST_FRAMES_XMIT\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->tx_packets/42);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_DIRECTED_BYTES_RCV:
++		DEBUG("%s: OID_GEN_DIRECTED_BYTES_RCV\n", __FUNCTION__);
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		retval = 0;
++		break;
++		
++	case OID_GEN_DIRECTED_FRAMES_RCV:
++		DEBUG("%s: OID_GEN_DIRECTED_FRAMES_RCV\n", __FUNCTION__);
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		retval = 0;
++		break;
++		
++	case OID_GEN_MULTICAST_BYTES_RCV:
++		DEBUG("%s: OID_GEN_MULTICAST_BYTES_RCV\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->multicast * 1111);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_MULTICAST_FRAMES_RCV:
++		DEBUG("%s: OID_GEN_MULTICAST_FRAMES_RCV\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->multicast);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_BROADCAST_BYTES_RCV:
++		DEBUG("%s: OID_GEN_BROADCAST_BYTES_RCV\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->rx_packets/42*255);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_BROADCAST_FRAMES_RCV:
++		DEBUG("%s: OID_GEN_BROADCAST_FRAMES_RCV\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->rx_packets/42);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_RCV_CRC_ERROR:
++		DEBUG("%s: OID_GEN_RCV_CRC_ERROR\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats) {
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->rx_crc_errors);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	case OID_GEN_TRANSMIT_QUEUE_LENGTH:
++		DEBUG("%s: OID_GEN_TRANSMIT_QUEUE_LENGTH\n", __FUNCTION__);
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		retval = 0;
++		break;
++#endif	/* RNDIS_OPTIONAL_STATS */
++
++	/* ieee802.3 OIDs (table 4-3) */
++
++	/* mandatory */
++	case OID_802_3_PERMANENT_ADDRESS:
++		DEBUG("%s: OID_802_3_PERMANENT_ADDRESS\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].dev) {
++			length = ETH_ALEN;
++			memcpy ((u8 *) resp + 24,
++				rndis_per_dev_params [configNr].host_mac,
++				length);
++			retval = 0;
++		} else {
++			*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_802_3_CURRENT_ADDRESS:
++		DEBUG("%s: OID_802_3_CURRENT_ADDRESS\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].dev) {
++			length = ETH_ALEN;
++			memcpy ((u8 *) resp + 24,
++				rndis_per_dev_params [configNr].host_mac,
++				length);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_802_3_MULTICAST_LIST:
++		DEBUG("%s: OID_802_3_MULTICAST_LIST\n", __FUNCTION__);
++		length = 4;
++		/* Multicast base address only */
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0xE0000000);
++		retval = 0;
++		break;
++		
++	/* mandatory */
++	case OID_802_3_MAXIMUM_LIST_SIZE:
++		DEBUG("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __FUNCTION__);
++		 length = 4;
++		/* Multicast base address only */
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (1);
++		retval = 0;
++		break;
++		
++	case OID_802_3_MAC_OPTIONS:
++		DEBUG("%s: OID_802_3_MAC_OPTIONS\n", __FUNCTION__);
++		break;
++
++	/* ieee802.3 statistics OIDs (table 4-4) */
++
++	/* mandatory */
++	case OID_802_3_RCV_ERROR_ALIGNMENT:
++		DEBUG("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __FUNCTION__);
++		if (rndis_per_dev_params [configNr].stats)
++		{
++			length = 4;
++			*((u32 *) resp + 6) = cpu_to_le32 (
++				rndis_per_dev_params [configNr]
++					.stats->rx_frame_errors);
++			retval = 0;
++		}
++		break;
++		
++	/* mandatory */
++	case OID_802_3_XMIT_ONE_COLLISION:
++		DEBUG("%s: OID_802_3_XMIT_ONE_COLLISION\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		retval = 0;
++		break;
++		
++	/* mandatory */
++	case OID_802_3_XMIT_MORE_COLLISIONS:
++		DEBUG("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __FUNCTION__);
++		length = 4;
++		*((u32 *) resp + 6) = __constant_cpu_to_le32 (0);
++		retval = 0;
++		break;
++		
++#ifdef	RNDIS_OPTIONAL_STATS
++	case OID_802_3_XMIT_DEFERRED:
++		DEBUG("%s: OID_802_3_XMIT_DEFERRED\n", __FUNCTION__);
++		/* TODO */
++		break;
++		
++	case OID_802_3_XMIT_MAX_COLLISIONS:
++		DEBUG("%s: OID_802_3_XMIT_MAX_COLLISIONS\n", __FUNCTION__);
++		/* TODO */
++		break;
++		
++	case OID_802_3_RCV_OVERRUN:
++		DEBUG("%s: OID_802_3_RCV_OVERRUN\n", __FUNCTION__);
++		/* TODO */
++		break;
++		
++	case OID_802_3_XMIT_UNDERRUN:
++		DEBUG("%s: OID_802_3_XMIT_UNDERRUN\n", __FUNCTION__);
++		/* TODO */
++		break;
++		
++	case OID_802_3_XMIT_HEARTBEAT_FAILURE:
++		DEBUG("%s: OID_802_3_XMIT_HEARTBEAT_FAILURE\n", __FUNCTION__);
++		/* TODO */
++		break;
++		
++	case OID_802_3_XMIT_TIMES_CRS_LOST:
++		DEBUG("%s: OID_802_3_XMIT_TIMES_CRS_LOST\n", __FUNCTION__);
++		/* TODO */
++		break;
++		
++	case OID_802_3_XMIT_LATE_COLLISIONS:
++		DEBUG("%s: OID_802_3_XMIT_LATE_COLLISIONS\n", __FUNCTION__);
++		/* TODO */
++		break;		
++#endif	/* RNDIS_OPTIONAL_STATS */
++
++#ifdef	RNDIS_PM
++	/* power management OIDs (table 4-5) */
++	case OID_PNP_CAPABILITIES:
++		DEBUG("%s: OID_PNP_CAPABILITIES\n", __FUNCTION__);
++
++		/* just PM, and remote wakeup on link status change
++		 * (not magic packet or pattern match)
++		 */
++		length = sizeof (struct NDIS_PNP_CAPABILITIES);
++		memset (resp, 0, length);
++		{
++			struct NDIS_PNP_CAPABILITIES *caps = (void *) resp;
++
++			caps->Flags = NDIS_DEVICE_WAKE_UP_ENABLE;
++			caps->WakeUpCapabilities.MinLinkChangeWakeUp 
++				 = NdisDeviceStateD3;
++
++			/* FIXME then use usb_gadget_wakeup(), and
++			 * set USB_CONFIG_ATT_WAKEUP in config desc
++			 */
++		}
++		retval = 0;
++		break;
++	case OID_PNP_QUERY_POWER:
++		DEBUG("%s: OID_PNP_QUERY_POWER\n", __FUNCTION__);
++		/* sure, handle any power state that maps to USB suspend */
++		retval = 0;
++		break;
++#endif
++
++	default:
++		printk (KERN_WARNING "%s: query unknown OID 0x%08X\n", 
++			 __FUNCTION__, OID);
++	}
++	
++	resp->InformationBufferOffset = __constant_cpu_to_le32 (16);
++	resp->InformationBufferLength = cpu_to_le32 (length);
++	resp->MessageLength = cpu_to_le32 (24 + length);
++	r->length = 24 + length;
++	return retval;
++}
++
++static int gen_ndis_set_resp (u8 configNr, u32 OID, u8 *buf, u32 buf_len, 
++			      rndis_resp_t *r)
++{
++	rndis_set_cmplt_type		*resp;
++	int 				i, retval = -ENOTSUPP;
++	struct rndis_params		*params;
++
++	if (!r)
++		return -ENOMEM;
++	resp = (rndis_set_cmplt_type *) r->buf;
++	if (!resp)
++		return -ENOMEM;
++
++	DEBUG("set OID %08x value, len %d:\n", OID, buf_len);
++	for (i = 0; i < buf_len; i += 16) {
++		DEBUG ("%03d: "
++			" %02x %02x %02x %02x"
++			" %02x %02x %02x %02x"
++			" %02x %02x %02x %02x"
++			" %02x %02x %02x %02x"
++			"\n",
++			i,
++			buf[i], buf [i+1],
++				buf[i+2], buf[i+3],
++			buf[i+4], buf [i+5],
++				buf[i+6], buf[i+7],
++			buf[i+8], buf [i+9],
++				buf[i+10], buf[i+11],
++			buf[i+12], buf [i+13],
++				buf[i+14], buf[i+15]);
++	}
++
++	switch (OID) {
++	case OID_GEN_CURRENT_PACKET_FILTER:
++		params = &rndis_per_dev_params [configNr];
++		retval = 0;
++
++		/* FIXME use these NDIS_PACKET_TYPE_* bitflags to
++		 * filter packets in hard_start_xmit()
++		 * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
++		 *	PROMISCUOUS, DIRECTED,
++		 *	MULTICAST, ALL_MULTICAST, BROADCAST
++		 */
++		params->filter = cpu_to_le32p((u32 *)buf);
++		DEBUG("%s: OID_GEN_CURRENT_PACKET_FILTER %08x\n",
++			__FUNCTION__, params->filter);
++
++		/* this call has a significant side effect:  it's
++		 * what makes the packet flow start and stop, like
++		 * activating the CDC Ethernet altsetting.
++		 */
++		if (params->filter) {
++			params->state = RNDIS_DATA_INITIALIZED;
++			netif_carrier_on(params->dev);
++			if (netif_running(params->dev))
++				netif_wake_queue (params->dev);
++		} else {
++			params->state = RNDIS_INITIALIZED;
++			netif_carrier_off (params->dev);
++			netif_stop_queue (params->dev);
++		}
++		break;
++		
++	case OID_802_3_MULTICAST_LIST:
++		/* I think we can ignore this */		
++		DEBUG("%s: OID_802_3_MULTICAST_LIST\n", __FUNCTION__);
++		retval = 0;
++		break;
++#if 0
++	case OID_GEN_RNDIS_CONFIG_PARAMETER:
++		{
++		struct rndis_config_parameter	*param;
++		param = (struct rndis_config_parameter *) buf;
++		DEBUG("%s: OID_GEN_RNDIS_CONFIG_PARAMETER '%*s'\n",
++			__FUNCTION__,
++			min(cpu_to_le32(param->ParameterNameLength),80),
++			buf + param->ParameterNameOffset);
++		retval = 0;
++		}
++		break;
++#endif
++
++#ifdef	RNDIS_PM
++	case OID_PNP_SET_POWER:
++		DEBUG ("OID_PNP_SET_POWER\n");
++		/* sure, handle any power state that maps to USB suspend */
++		retval = 0;
++		break;
++
++	case OID_PNP_ENABLE_WAKE_UP:
++		/* always-connected ... */
++		DEBUG ("OID_PNP_ENABLE_WAKE_UP\n");
++		retval = 0;
++		break;
++
++	// no PM resume patterns supported (specified where?)
++	// so OID_PNP_{ADD,REMOVE}_WAKE_UP_PATTERN always fails
++#endif
++
++	default:
++		printk (KERN_WARNING "%s: set unknown OID 0x%08X, size %d\n", 
++			 __FUNCTION__, OID, buf_len);
++	}
++	
++	return retval;
++}
++
++/* 
++ * Response Functions 
++ */
++
++static int rndis_init_response (int configNr, rndis_init_msg_type *buf)
++{
++	rndis_init_cmplt_type	*resp; 
++	rndis_resp_t            *r;
++	
++	if (!rndis_per_dev_params [configNr].dev) return -ENOTSUPP;
++	
++	r = rndis_add_response (configNr, sizeof (rndis_init_cmplt_type));
++	
++	if (!r) return -ENOMEM;
++	
++	resp = (rndis_init_cmplt_type *) r->buf;
++	
++	if (!resp) return -ENOMEM;
++	
++	resp->MessageType = __constant_cpu_to_le32 (
++			REMOTE_NDIS_INITIALIZE_CMPLT);
++	resp->MessageLength = __constant_cpu_to_le32 (52);
++	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
++	resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
++	resp->MajorVersion = __constant_cpu_to_le32 (RNDIS_MAJOR_VERSION);
++	resp->MinorVersion = __constant_cpu_to_le32 (RNDIS_MINOR_VERSION);
++	resp->DeviceFlags = __constant_cpu_to_le32 (RNDIS_DF_CONNECTIONLESS);
++	resp->Medium = __constant_cpu_to_le32 (RNDIS_MEDIUM_802_3);
++	resp->MaxPacketsPerTransfer = __constant_cpu_to_le32 (1);
++	resp->MaxTransferSize = cpu_to_le32 (
++		  rndis_per_dev_params [configNr].dev->mtu
++		+ sizeof (struct ethhdr)
++		+ sizeof (struct rndis_packet_msg_type)
++		+ 22);
++	resp->PacketAlignmentFactor = __constant_cpu_to_le32 (0);
++	resp->AFListOffset = __constant_cpu_to_le32 (0);
++	resp->AFListSize = __constant_cpu_to_le32 (0);
++	
++	if (rndis_per_dev_params [configNr].ack)
++	    rndis_per_dev_params [configNr].ack (
++	    		rndis_per_dev_params [configNr].dev);
++	
++	return 0;
++}
++
++static int rndis_query_response (int configNr, rndis_query_msg_type *buf)
++{
++	rndis_query_cmplt_type *resp;
++	rndis_resp_t            *r;
++	
++	// DEBUG("%s: OID = %08X\n", __FUNCTION__, cpu_to_le32(buf->OID));
++	if (!rndis_per_dev_params [configNr].dev) return -ENOTSUPP;
++	
++	/* 
++	 * we need more memory: 
++	 * oid_supported_list is the largest answer 
++	 */
++	r = rndis_add_response (configNr, sizeof (oid_supported_list));
++	
++	if (!r) return -ENOMEM;
++	resp = (rndis_query_cmplt_type *) r->buf;
++	
++	if (!resp) return -ENOMEM;
++	
++	resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_QUERY_CMPLT);
++	resp->MessageLength = __constant_cpu_to_le32 (24);
++	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
++	
++	if (gen_ndis_query_resp (configNr, cpu_to_le32 (buf->OID), r)) {
++		/* OID not supported */
++		resp->Status = __constant_cpu_to_le32 (
++				RNDIS_STATUS_NOT_SUPPORTED);
++		resp->InformationBufferLength = __constant_cpu_to_le32 (0);
++		resp->InformationBufferOffset = __constant_cpu_to_le32 (0);
++	} else
++		resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
++	
++	if (rndis_per_dev_params [configNr].ack)
++	    rndis_per_dev_params [configNr].ack (
++	    		rndis_per_dev_params [configNr].dev);
++	return 0;
++}
++
++static int rndis_set_response (int configNr, rndis_set_msg_type *buf)
++{
++	u32			BufLength, BufOffset;
++	rndis_set_cmplt_type	*resp;
++	rndis_resp_t		*r;
++	
++	r = rndis_add_response (configNr, sizeof (rndis_set_cmplt_type));
++	
++	if (!r) return -ENOMEM;
++	resp = (rndis_set_cmplt_type *) r->buf;
++	if (!resp) return -ENOMEM;
++
++	BufLength = cpu_to_le32 (buf->InformationBufferLength);
++	BufOffset = cpu_to_le32 (buf->InformationBufferOffset);
++
++#ifdef	VERBOSE
++	DEBUG("%s: Length: %d\n", __FUNCTION__, BufLength);
++	DEBUG("%s: Offset: %d\n", __FUNCTION__, BufOffset);
++	DEBUG("%s: InfoBuffer: ", __FUNCTION__);
++	
++	for (i = 0; i < BufLength; i++) {
++		DEBUG ("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
++	}
++	
++	DEBUG ("\n");
++#endif
++	
++	resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_SET_CMPLT);
++	resp->MessageLength = __constant_cpu_to_le32 (16);
++	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
++	if (gen_ndis_set_resp (configNr, cpu_to_le32 (buf->OID), 
++			       ((u8 *) buf) + 8 + BufOffset, BufLength, r))
++	    resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_NOT_SUPPORTED);
++	else resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
++	
++	if (rndis_per_dev_params [configNr].ack)
++	    rndis_per_dev_params [configNr].ack (
++	    		rndis_per_dev_params [configNr].dev);
++	
++	return 0;
++}
++
++static int rndis_reset_response (int configNr, rndis_reset_msg_type *buf)
++{
++	rndis_reset_cmplt_type	*resp;
++	rndis_resp_t		*r;
++	
++	r = rndis_add_response (configNr, sizeof (rndis_reset_cmplt_type));
++	
++	if (!r) return -ENOMEM;
++	resp = (rndis_reset_cmplt_type *) r->buf;
++	if (!resp) return -ENOMEM;
++	
++	resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_RESET_CMPLT);
++	resp->MessageLength = __constant_cpu_to_le32 (16);
++	resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
++	/* resent information */
++	resp->AddressingReset = __constant_cpu_to_le32 (1);
++	
++	if (rndis_per_dev_params [configNr].ack)
++	    rndis_per_dev_params [configNr].ack (
++	    		rndis_per_dev_params [configNr].dev);
++
++	return 0;
++}
++
++static int rndis_keepalive_response (int configNr,
++				     rndis_keepalive_msg_type *buf)
++{
++	rndis_keepalive_cmplt_type	*resp;
++	rndis_resp_t			*r;
++
++	/* host "should" check only in RNDIS_DATA_INITIALIZED state */
++
++	r = rndis_add_response (configNr, sizeof (rndis_keepalive_cmplt_type));
++	resp = (rndis_keepalive_cmplt_type *) r->buf;
++	if (!resp) return -ENOMEM;
++		
++	resp->MessageType = __constant_cpu_to_le32 (
++			REMOTE_NDIS_KEEPALIVE_CMPLT);
++	resp->MessageLength = __constant_cpu_to_le32 (16);
++	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
++	resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
++	
++	if (rndis_per_dev_params [configNr].ack)
++	    rndis_per_dev_params [configNr].ack (
++	    		rndis_per_dev_params [configNr].dev);
++	
++	return 0;
++}
++
++
++/* 
++ * Device to Host Comunication 
++ */
++static int rndis_indicate_status_msg (int configNr, u32 status)
++{
++	rndis_indicate_status_msg_type	*resp;	
++	rndis_resp_t			*r;
++	
++	if (rndis_per_dev_params [configNr].state == RNDIS_UNINITIALIZED)
++	    return -ENOTSUPP;
++	
++	r = rndis_add_response (configNr, 
++				sizeof (rndis_indicate_status_msg_type));
++	if (!r) return -ENOMEM;
++	
++	resp = (rndis_indicate_status_msg_type *) r->buf;
++	if (!resp) return -ENOMEM;
++	
++	resp->MessageType = __constant_cpu_to_le32 (
++			REMOTE_NDIS_INDICATE_STATUS_MSG);
++	resp->MessageLength = __constant_cpu_to_le32 (20);
++	resp->Status = cpu_to_le32 (status);
++	resp->StatusBufferLength = __constant_cpu_to_le32 (0);
++	resp->StatusBufferOffset = __constant_cpu_to_le32 (0);
++	
++	if (rndis_per_dev_params [configNr].ack) 
++	    rndis_per_dev_params [configNr].ack (
++	    		rndis_per_dev_params [configNr].dev);
++	return 0;
++}
++
++int rndis_signal_connect (int configNr)
++{
++	rndis_per_dev_params [configNr].media_state
++			= NDIS_MEDIA_STATE_CONNECTED;
++	return rndis_indicate_status_msg (configNr, 
++					  RNDIS_STATUS_MEDIA_CONNECT);
++}
++
++int rndis_signal_disconnect (int configNr)
++{
++	rndis_per_dev_params [configNr].media_state
++			= NDIS_MEDIA_STATE_DISCONNECTED;
++	return rndis_indicate_status_msg (configNr,
++					  RNDIS_STATUS_MEDIA_DISCONNECT);
++}
++
++void rndis_set_host_mac (int configNr, const u8 *addr)
++{
++	rndis_per_dev_params [configNr].host_mac = addr;
++}
++
++/* 
++ * Message Parser 
++ */
++int rndis_msg_parser (u8 configNr, u8 *buf)
++{
++	u32 MsgType, MsgLength, *tmp;
++	struct rndis_params		*params;
++	
++	if (!buf)
++		return -ENOMEM;
++	
++	tmp = (u32 *) buf; 
++	MsgType   = cpu_to_le32p(tmp++);
++	MsgLength = cpu_to_le32p(tmp++);
++	
++	if (configNr >= RNDIS_MAX_CONFIGS)
++		return -ENOTSUPP;
++	params = &rndis_per_dev_params [configNr];
++	
++	/* For USB: responses may take up to 10 seconds */
++	switch (MsgType)
++	{
++	case REMOTE_NDIS_INITIALIZE_MSG:
++		DEBUG("%s: REMOTE_NDIS_INITIALIZE_MSG\n", 
++			__FUNCTION__ );
++		params->state = RNDIS_INITIALIZED;
++		return  rndis_init_response (configNr,
++					     (rndis_init_msg_type *) buf);
++		
++	case REMOTE_NDIS_HALT_MSG:
++		DEBUG("%s: REMOTE_NDIS_HALT_MSG\n",
++			__FUNCTION__ );
++		params->state = RNDIS_UNINITIALIZED;
++		if (params->dev) {
++			netif_carrier_off (params->dev);
++			netif_stop_queue (params->dev);
++		}
++		return 0;
++		
++	case REMOTE_NDIS_QUERY_MSG:
++		return rndis_query_response (configNr, 
++					     (rndis_query_msg_type *) buf);
++		
++	case REMOTE_NDIS_SET_MSG:
++		return rndis_set_response (configNr, 
++					   (rndis_set_msg_type *) buf);
++		
++	case REMOTE_NDIS_RESET_MSG:
++		DEBUG("%s: REMOTE_NDIS_RESET_MSG\n", 
++			__FUNCTION__ );
++		return rndis_reset_response (configNr,
++					     (rndis_reset_msg_type *) buf);
++
++	case REMOTE_NDIS_KEEPALIVE_MSG:
++		/* For USB: host does this every 5 seconds */
++#ifdef	VERBOSE
++		DEBUG("%s: REMOTE_NDIS_KEEPALIVE_MSG\n", 
++			__FUNCTION__ );
++#endif
++		return rndis_keepalive_response (configNr,
++						 (rndis_keepalive_msg_type *) 
++						 buf);
++		
++	default: 
++		/* At least Windows XP emits some undefined RNDIS messages.
++		 * In one case those messages seemed to relate to the host
++		 * suspending itself.
++		 */
++		printk (KERN_WARNING
++			"%s: unknown RNDIS message 0x%08X len %d\n", 
++			__FUNCTION__ , MsgType, MsgLength);
++		{
++			unsigned i;
++			for (i = 0; i < MsgLength; i += 16) {
++				DEBUG ("%03d: "
++					" %02x %02x %02x %02x"
++					" %02x %02x %02x %02x"
++					" %02x %02x %02x %02x"
++					" %02x %02x %02x %02x"
++					"\n",
++					i,
++					buf[i], buf [i+1],
++						buf[i+2], buf[i+3],
++					buf[i+4], buf [i+5],
++						buf[i+6], buf[i+7],
++					buf[i+8], buf [i+9],
++						buf[i+10], buf[i+11],
++					buf[i+12], buf [i+13],
++						buf[i+14], buf[i+15]);
++			}
++		}
++		break;
++	}
++	
++	return -ENOTSUPP;
++}
++
++int rndis_register (int (* rndis_control_ack) (struct net_device *))
++{
++	u8 i;
++	
++	for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
++		if (!rndis_per_dev_params [i].used) {
++			rndis_per_dev_params [i].used = 1;
++			rndis_per_dev_params [i].ack = rndis_control_ack;
++			DEBUG("%s: configNr = %d\n", __FUNCTION__, i);
++			return i;
++		}
++	}
++	DEBUG("failed\n");
++	
++	return -1;
++}
++
++void rndis_deregister (int configNr)
++{
++	DEBUG("%s: \n", __FUNCTION__ );
++	
++	if (configNr >= RNDIS_MAX_CONFIGS) return;
++	rndis_per_dev_params [configNr].used = 0;
++	
++	return;
++}
++
++int rndis_set_param_dev (u8 configNr, struct net_device *dev, 
++			 struct net_device_stats *stats)
++{
++	DEBUG("%s:\n", __FUNCTION__ );
++	if (!dev || !stats) return -1;
++	if (configNr >= RNDIS_MAX_CONFIGS) return -1;
++	
++	rndis_per_dev_params [configNr].dev = dev;
++	rndis_per_dev_params [configNr].stats = stats;
++	
++	return 0;
++}
++
++int rndis_set_param_vendor (u8 configNr, u32 vendorID, const char *vendorDescr)
++{
++	DEBUG("%s:\n", __FUNCTION__ );
++	if (!vendorDescr) return -1;
++	if (configNr >= RNDIS_MAX_CONFIGS) return -1;
++	
++	rndis_per_dev_params [configNr].vendorID = vendorID;
++	rndis_per_dev_params [configNr].vendorDescr = vendorDescr;
++	
++	return 0;
++}
++
++int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed)
++{
++	DEBUG("%s:\n", __FUNCTION__ );
++	if (configNr >= RNDIS_MAX_CONFIGS) return -1;
++	
++	rndis_per_dev_params [configNr].medium = medium;
++	rndis_per_dev_params [configNr].speed = speed;
++	
++	return 0;
++}
++
++void rndis_add_hdr (struct sk_buff *skb)
++{
++	if (!skb) return;
++	skb_push (skb, sizeof (struct rndis_packet_msg_type));
++	memset (skb->data, 0, sizeof (struct rndis_packet_msg_type));
++	*((u32 *) skb->data) = __constant_cpu_to_le32 (1);
++	*((u32 *) skb->data + 1) = cpu_to_le32(skb->len);
++	*((u32 *) skb->data + 2) = __constant_cpu_to_le32 (36);
++	*((u32 *) skb->data + 3) = cpu_to_le32(skb->len - 44);
++	
++	return;
++}
++
++void rndis_free_response (int configNr, u8 *buf)
++{
++	rndis_resp_t		*r;
++	struct list_head	*act, *tmp;
++	
++	list_for_each_safe (act, tmp, 
++			    &(rndis_per_dev_params [configNr].resp_queue))
++	{
++		r = list_entry (act, rndis_resp_t, list);
++		if (r && r->buf == buf) {
++			list_del (&r->list);
++			kfree (r);
++		}
++	}
++}
++
++u8 *rndis_get_next_response (int configNr, u32 *length)
++{
++	rndis_resp_t		*r;
++	struct list_head 	*act, *tmp;
++	
++	if (!length) return NULL;
++	
++	list_for_each_safe (act, tmp, 
++			    &(rndis_per_dev_params [configNr].resp_queue))
++	{
++		r = list_entry (act, rndis_resp_t, list);
++		if (!r->send) {
++			r->send = 1;
++			*length = r->length;
++			return r->buf;
++		}
++	}
++	
++	return NULL;
++}
++
++static rndis_resp_t *rndis_add_response (int configNr, u32 length)
++{
++	rndis_resp_t	*r;
++	
++	r = kmalloc (sizeof (rndis_resp_t) + length, GFP_ATOMIC);
++	if (!r) return NULL;
++	
++	r->buf = (u8 *) (r + 1);
++	r->length = length;
++	r->send = 0;
++	
++	list_add_tail (&r->list, 
++		       &(rndis_per_dev_params [configNr].resp_queue));
++	return r;
++}
++
++int rndis_rm_hdr (u8 *buf, u32 *length)
++{
++	u32 i, messageLen, dataOffset, *tmp;
++	
++	tmp = (u32 *) buf; 
++
++	if (!buf || !length) return -1;
++	if (cpu_to_le32p(tmp++) != 1) return -1;
++	
++	messageLen = cpu_to_le32p(tmp++);
++	dataOffset = cpu_to_le32p(tmp++) + 8;
++
++	if (messageLen < dataOffset || messageLen > *length) return -1;
++	
++	for (i = dataOffset; i < messageLen; i++)
++		buf [i - dataOffset] = buf [i];
++		
++	*length = messageLen - dataOffset;
++	
++	return 0;
++}
++
++#ifdef	CONFIG_USB_GADGET_DEBUG_FILES
++
++static int rndis_proc_read (char *page, char **start, off_t off, int count, int *eof, 
++		     void *data)
++{
++	char *out = page;
++	int len;
++	rndis_params *param = (rndis_params *) data;
++	
++	out += snprintf (out, count, 
++			 "Config Nr. %d\n"
++			 "used      : %s\n"
++			 "state     : %s\n"
++			 "medium    : 0x%08X\n"
++			 "speed     : %d\n"
++			 "cable     : %s\n"
++			 "vendor ID : 0x%08X\n"
++			 "vendor    : %s\n", 
++			 param->confignr, (param->used) ? "y" : "n", 
++			 ({ char *s = "?";
++			 switch (param->state) {
++			 case RNDIS_UNINITIALIZED:
++				s = "RNDIS_UNINITIALIZED"; break;
++			 case RNDIS_INITIALIZED:
++				s = "RNDIS_INITIALIZED"; break;
++			 case RNDIS_DATA_INITIALIZED:
++				s = "RNDIS_DATA_INITIALIZED"; break;
++			}; s; }),
++			 param->medium, 
++			 (param->media_state) ? 0 : param->speed*100, 
++			 (param->media_state) ? "disconnected" : "connected",
++			 param->vendorID, param->vendorDescr);      
++	
++	len = out - page;
++	len -= off;
++	
++	if (len < count) {
++		*eof = 1;
++		if (len <= 0)
++			return 0;
++	} else
++		len = count;
++	
++	*start = page + off;
++	return len;
++}
++
++static int rndis_proc_write (struct file *file, const char __user *buffer, 
++		      unsigned long count, void *data)
++{
++	rndis_params *p = data;
++	u32 speed = 0;
++	int i, fl_speed = 0;
++	
++	for (i = 0; i < count; i++) {
++		char c;
++		if (get_user(c, buffer))
++			return -EFAULT;
++		switch (c) {
++		case '0':
++		case '1':
++		case '2':
++		case '3':
++		case '4':
++		case '5':
++		case '6':
++		case '7':
++		case '8':
++		case '9':
++			fl_speed = 1;
++			speed = speed*10 + c - '0';
++			break;
++		case 'C':
++		case 'c':
++			rndis_signal_connect (p->confignr);
++			break;
++		case 'D':
++		case 'd':
++			rndis_signal_disconnect(p->confignr);
++			break;
++		default: 
++			if (fl_speed) p->speed = speed;
++			else DEBUG ("%c is not valid\n", c);
++			break;
++		}
++		
++		buffer++;
++	}
++	
++	return count;
++}
++
++#define	NAME_TEMPLATE	"driver/rndis-%03d"
++
++static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
++
++#endif	/* CONFIG_USB_GADGET_DEBUG_FILES */
++
++
++int __init rndis_init (void)
++{
++	u8 i;
++
++	for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
++#ifdef	CONFIG_USB_GADGET_DEBUG_FILES
++		char name [20];
++
++		sprintf (name, NAME_TEMPLATE, i);
++		if (!(rndis_connect_state [i]
++				= create_proc_entry (name, 0660, NULL))) 
++		{
++			DEBUG ("%s :remove entries", __FUNCTION__);
++			while (i) {
++				sprintf (name, NAME_TEMPLATE, --i);
++				remove_proc_entry (name, NULL);
++			}
++			DEBUG ("\n");
++			return -EIO;
++		}
++
++		rndis_connect_state [i]->nlink = 1;
++		rndis_connect_state [i]->write_proc = rndis_proc_write;
++		rndis_connect_state [i]->read_proc = rndis_proc_read;
++		rndis_connect_state [i]->data = (void *)
++				(rndis_per_dev_params + i);
++#endif
++		rndis_per_dev_params [i].confignr = i;
++		rndis_per_dev_params [i].used = 0;
++		rndis_per_dev_params [i].state = RNDIS_UNINITIALIZED;
++		rndis_per_dev_params [i].media_state
++				= NDIS_MEDIA_STATE_DISCONNECTED;
++		INIT_LIST_HEAD (&(rndis_per_dev_params [i].resp_queue));
++	}
++	
++	return 0;
++}
++
++void rndis_exit (void)
++{
++#ifdef	CONFIG_USB_GADGET_DEBUG_FILES
++	u8 i;
++	char name [20];
++	
++	for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
++		sprintf (name, NAME_TEMPLATE, i);
++		remove_proc_entry (name, NULL);
++	}
++#endif
++}
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/rndis.h kernel/drivers/usb/gadget/rndis.h
+--- /tmp/kernel/drivers/usb/gadget/rndis.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/rndis.h	2005-04-22 17:53:19.504528119 +0200
+@@ -0,0 +1,348 @@
++/* 
++ * RNDIS	Definitions for Remote NDIS
++ * 
++ * Version:	$Id: rndis.h,v 1.15 2004/03/25 21:33:46 robert Exp $
++ * 
++ * Authors:	Benedikt Spranger, Pengutronix
++ * 		Robert Schwebel, Pengutronix
++ * 
++ * 		This program is free software; you can redistribute it and/or
++ *		modify it under the terms of the GNU General Public License
++ *		version 2, as published by the Free Software Foundation. 
++ * 
++ *		This software was originally developed in conformance with
++ *		Microsoft's Remote NDIS Specification License Agreement.
++ */
++
++#ifndef _LINUX_RNDIS_H
++#define _LINUX_RNDIS_H
++
++#include "ndis.h"
++
++#define RNDIS_MAXIMUM_FRAME_SIZE	1518
++#define RNDIS_MAX_TOTAL_SIZE		1558
++
++/* Remote NDIS Versions */
++#define RNDIS_MAJOR_VERSION		1
++#define RNDIS_MINOR_VERSION		0
++
++/* Status Values */
++#define RNDIS_STATUS_SUCCESS		0x00000000U	/* Success           */
++#define RNDIS_STATUS_FAILURE		0xC0000001U	/* Unspecified error */
++#define RNDIS_STATUS_INVALID_DATA	0xC0010015U	/* Invalid data      */
++#define RNDIS_STATUS_NOT_SUPPORTED	0xC00000BBU	/* Unsupported request */
++#define RNDIS_STATUS_MEDIA_CONNECT	0x4001000BU	/* Device connected  */
++#define RNDIS_STATUS_MEDIA_DISCONNECT	0x4001000CU	/* Device disconnected */
++/* For all not specified status messages:
++ * RNDIS_STATUS_Xxx -> NDIS_STATUS_Xxx 
++ */
++
++/* Message Set for Connectionless (802.3) Devices */
++#define REMOTE_NDIS_INITIALIZE_MSG	0x00000002U	/* Initialize device */
++#define REMOTE_NDIS_HALT_MSG		0x00000003U
++#define REMOTE_NDIS_QUERY_MSG		0x00000004U
++#define REMOTE_NDIS_SET_MSG		0x00000005U
++#define REMOTE_NDIS_RESET_MSG		0x00000006U
++#define REMOTE_NDIS_INDICATE_STATUS_MSG	0x00000007U
++#define REMOTE_NDIS_KEEPALIVE_MSG	0x00000008U
++
++/* Message completion */
++#define REMOTE_NDIS_INITIALIZE_CMPLT	0x80000002U
++#define REMOTE_NDIS_QUERY_CMPLT		0x80000004U
++#define REMOTE_NDIS_SET_CMPLT		0x80000005U
++#define REMOTE_NDIS_RESET_CMPLT		0x80000006U
++#define REMOTE_NDIS_KEEPALIVE_CMPLT	0x80000008U
++
++/* Device Flags */
++#define RNDIS_DF_CONNECTIONLESS		0x00000001U
++#define RNDIS_DF_CONNECTION_ORIENTED	0x00000002U
++
++#define RNDIS_MEDIUM_802_3		0x00000000U
++
++/* from drivers/net/sk98lin/h/skgepnmi.h */
++#define OID_PNP_CAPABILITIES			0xFD010100
++#define OID_PNP_SET_POWER			0xFD010101
++#define OID_PNP_QUERY_POWER			0xFD010102
++#define OID_PNP_ADD_WAKE_UP_PATTERN		0xFD010103
++#define OID_PNP_REMOVE_WAKE_UP_PATTERN		0xFD010104
++#define OID_PNP_ENABLE_WAKE_UP			0xFD010106
++
++
++/* supported OIDs */
++static const u32 oid_supported_list [] = 
++{
++	/* the general stuff */
++	OID_GEN_SUPPORTED_LIST,
++	OID_GEN_HARDWARE_STATUS,
++	OID_GEN_MEDIA_SUPPORTED,
++	OID_GEN_MEDIA_IN_USE,
++	OID_GEN_MAXIMUM_FRAME_SIZE,
++	OID_GEN_LINK_SPEED,
++	OID_GEN_TRANSMIT_BLOCK_SIZE,
++	OID_GEN_RECEIVE_BLOCK_SIZE,
++	OID_GEN_VENDOR_ID,
++	OID_GEN_VENDOR_DESCRIPTION,
++	OID_GEN_VENDOR_DRIVER_VERSION,
++	OID_GEN_CURRENT_PACKET_FILTER,
++	OID_GEN_MAXIMUM_TOTAL_SIZE,
++	OID_GEN_MEDIA_CONNECT_STATUS,
++	OID_GEN_PHYSICAL_MEDIUM,
++#if 0
++	OID_GEN_RNDIS_CONFIG_PARAMETER,
++#endif
++	
++	/* the statistical stuff */
++	OID_GEN_XMIT_OK,
++	OID_GEN_RCV_OK,
++	OID_GEN_XMIT_ERROR,
++	OID_GEN_RCV_ERROR,
++	OID_GEN_RCV_NO_BUFFER,
++#ifdef	RNDIS_OPTIONAL_STATS
++	OID_GEN_DIRECTED_BYTES_XMIT,
++	OID_GEN_DIRECTED_FRAMES_XMIT,
++	OID_GEN_MULTICAST_BYTES_XMIT,
++	OID_GEN_MULTICAST_FRAMES_XMIT,
++	OID_GEN_BROADCAST_BYTES_XMIT,
++	OID_GEN_BROADCAST_FRAMES_XMIT,
++	OID_GEN_DIRECTED_BYTES_RCV,
++	OID_GEN_DIRECTED_FRAMES_RCV,
++	OID_GEN_MULTICAST_BYTES_RCV,
++	OID_GEN_MULTICAST_FRAMES_RCV,
++	OID_GEN_BROADCAST_BYTES_RCV,
++	OID_GEN_BROADCAST_FRAMES_RCV,
++	OID_GEN_RCV_CRC_ERROR,
++	OID_GEN_TRANSMIT_QUEUE_LENGTH,
++#endif	/* RNDIS_OPTIONAL_STATS */
++
++    	/* mandatory 802.3 */
++	/* the general stuff */
++	OID_802_3_PERMANENT_ADDRESS,
++	OID_802_3_CURRENT_ADDRESS,
++	OID_802_3_MULTICAST_LIST,
++	OID_802_3_MAC_OPTIONS,
++	OID_802_3_MAXIMUM_LIST_SIZE,
++	
++	/* the statistical stuff */
++	OID_802_3_RCV_ERROR_ALIGNMENT,
++	OID_802_3_XMIT_ONE_COLLISION,
++	OID_802_3_XMIT_MORE_COLLISIONS,
++#ifdef	RNDIS_OPTIONAL_STATS
++	OID_802_3_XMIT_DEFERRED,
++	OID_802_3_XMIT_MAX_COLLISIONS,
++	OID_802_3_RCV_OVERRUN,
++	OID_802_3_XMIT_UNDERRUN,
++	OID_802_3_XMIT_HEARTBEAT_FAILURE,
++	OID_802_3_XMIT_TIMES_CRS_LOST,
++	OID_802_3_XMIT_LATE_COLLISIONS,
++#endif	/* RNDIS_OPTIONAL_STATS */
++
++#ifdef	RNDIS_PM
++	/* PM and wakeup are mandatory for USB: */
++
++	/* power management */
++	OID_PNP_CAPABILITIES,
++	OID_PNP_QUERY_POWER,
++	OID_PNP_SET_POWER,
++
++	/* wake up host */
++	OID_PNP_ENABLE_WAKE_UP,
++	OID_PNP_ADD_WAKE_UP_PATTERN,
++	OID_PNP_REMOVE_WAKE_UP_PATTERN,
++#endif
++};
++
++
++typedef struct rndis_init_msg_type 
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++	u32	MajorVersion;
++	u32	MinorVersion;
++	u32	MaxTransferSize;
++} rndis_init_msg_type;
++
++typedef struct rndis_init_cmplt_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++	u32	Status;
++	u32	MajorVersion;
++	u32	MinorVersion;
++	u32	DeviceFlags;
++	u32	Medium;
++	u32	MaxPacketsPerTransfer;
++	u32	MaxTransferSize;
++	u32	PacketAlignmentFactor;
++	u32	AFListOffset;
++	u32	AFListSize;
++} rndis_init_cmplt_type;
++
++typedef struct rndis_halt_msg_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++} rndis_halt_msg_type;
++
++typedef struct rndis_query_msg_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++	u32	OID;
++	u32	InformationBufferLength;
++	u32	InformationBufferOffset;
++	u32	DeviceVcHandle;
++} rndis_query_msg_type;
++
++typedef struct rndis_query_cmplt_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++	u32	Status;
++	u32	InformationBufferLength;
++	u32	InformationBufferOffset;
++} rndis_query_cmplt_type;
++
++typedef struct rndis_set_msg_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++	u32	OID;
++	u32	InformationBufferLength;
++	u32	InformationBufferOffset;
++	u32	DeviceVcHandle;
++} rndis_set_msg_type;
++
++typedef struct rndis_set_cmplt_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++	u32	Status;
++} rndis_set_cmplt_type;
++
++typedef struct rndis_reset_msg_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	Reserved;
++} rndis_reset_msg_type;
++
++typedef struct rndis_reset_cmplt_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	Status;
++	u32	AddressingReset;
++} rndis_reset_cmplt_type;
++
++typedef struct rndis_indicate_status_msg_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	Status;
++	u32	StatusBufferLength;
++	u32	StatusBufferOffset;
++} rndis_indicate_status_msg_type;
++
++typedef struct rndis_keepalive_msg_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++} rndis_keepalive_msg_type;
++
++typedef struct rndis_keepalive_cmplt_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	RequestID;
++	u32	Status;
++} rndis_keepalive_cmplt_type;
++
++struct rndis_packet_msg_type
++{
++	u32	MessageType;
++	u32	MessageLength;
++	u32	DataOffset;
++	u32	DataLength;
++	u32	OOBDataOffset;
++	u32	OOBDataLength;
++	u32	NumOOBDataElements;
++	u32	PerPacketInfoOffset;
++	u32	PerPacketInfoLength;
++	u32	VcHandle;
++	u32	Reserved;
++};
++
++struct rndis_config_parameter
++{
++	u32	ParameterNameOffset;
++	u32	ParameterNameLength;
++	u32	ParameterType;
++	u32	ParameterValueOffset;
++	u32	ParameterValueLength;
++};
++
++/* implementation specific */
++enum rndis_state
++{
++	RNDIS_UNINITIALIZED,
++	RNDIS_INITIALIZED,
++	RNDIS_DATA_INITIALIZED,
++};
++
++typedef struct rndis_resp_t
++{
++	struct list_head	list;
++	u8			*buf;
++	u32			length;
++	int			send;
++} rndis_resp_t;
++
++typedef struct rndis_params
++{
++	u8			confignr;
++	int			used;
++	enum rndis_state	state;
++	u32			filter;
++	u32			medium;
++	u32			speed;
++	u32			media_state;
++	const u8		*host_mac;
++	struct net_device 	*dev;
++	struct net_device_stats *stats;
++	u32			vendorID;
++	const char		*vendorDescr;
++	int 			(*ack) (struct net_device *);
++	struct list_head	resp_queue;
++} rndis_params;
++
++/* RNDIS Message parser and other useless functions */
++int  rndis_msg_parser (u8 configNr, u8 *buf);
++int  rndis_register (int (*rndis_control_ack) (struct net_device *));
++void rndis_deregister (int configNr);
++int  rndis_set_param_dev (u8 configNr, struct net_device *dev,
++			 struct net_device_stats *stats);
++int  rndis_set_param_vendor (u8 configNr, u32 vendorID, 
++			    const char *vendorDescr);
++int  rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
++void rndis_add_hdr (struct sk_buff *skb);
++int  rndis_rm_hdr (u8 *buf, u32 *length);
++u8   *rndis_get_next_response (int configNr, u32 *length);
++void rndis_free_response (int configNr, u8 *buf);
++
++int  rndis_signal_connect (int configNr);
++int  rndis_signal_disconnect (int configNr);
++int  rndis_state (int configNr);
++extern void rndis_set_host_mac (int configNr, const u8 *addr);
++
++int __init rndis_init (void);
++void rndis_exit (void);
++
++#endif  /* _LINUX_RNDIS_H */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/superh_udc.c kernel/drivers/usb/gadget/superh_udc.c
+--- /tmp/kernel/drivers/usb/gadget/superh_udc.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/superh_udc.c	2005-04-22 17:53:19.510527142 +0200
+@@ -0,0 +1,1819 @@
++/*
++ * Renesas SuperH USB 1.1 device controller (found on SH7705, SH7727...)
++ *
++ * Copyright (C) 2003 Renesas Technology Europe Limited
++ * Copyright (C) 2003 Julian Back (jback@mpc-data.co.uk), MPC Data Limited
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++/*
++ * This is a driver for the USB Device Controller found on Renesas SH
++ * processors.  This is a full-speed controller which has four
++ * endpoints in a single fixed configuration.
++ *
++ * Limitations
++ *
++ * Only tested on SH7705.  Mostly tested with Mass Storage gadget
++ * using Bulk-Only Transport.  It has been tested with Linux 2.4,
++ * Linux 2.6, Windows 2000 and Windows XP hosts.
++ * 
++ * DMA is not (yet) implemented.
++ *
++ * Handling of application stalls is tricky.  We set a bit to stall an
++ * endpoint.  When the host tries to access the ep it gets a stall and
++ * another stall bit is latched by the device.  The host clears the
++ * stall with a clear feature but the hardware doesn't inform us, the
++ * latched bit is cleared but not the bit we have set, so the next
++ * time the host accesses the ep it will get another stall and the
++ * latch will be set again unless we have cleared our stall bit.  The
++ * solution adopted in this driver is to use a timer to clear the
++ * application stall bit some time after setting the stall.  This
++ * seems to work most of the time but is not 100% reliable.  Because
++ * of this it is best to avoid USB protocols that require the USB
++ * device to stall the host.  Unfortunately USB mass storage does
++ * require the device to stall when it gets unsupported commands,
++ * Linux hosts don't send any of these unsupported commands but
++ * Windows hosts do.
++ *
++ * Another place where the hardware is too clever is in the handling
++ * of setup packets.  Many setup packets including SET_INTERFACE and
++ * SET_CONFIGURATION are handled by the hardware without informing the
++ * driver software.  But we need to inform the gadget driver of at
++ * least one of these as it uses this to kick of it's data processing.
++ * The solution adopted is that after we have recieved N setup packets
++ * following a bus reset a fake SET_CONFIGURATION is sent to the
++ * gadget.  We also have to arrange things so that the reply to the
++ * fake packet is not sent out.
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/ioport.h>
++#include <linux/types.h>
++#include <linux/version.h>
++#include <linux/errno.h>
++#include <linux/delay.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++#include <linux/proc_fs.h>
++#include <linux/mm.h>
++
++#include <asm/atomic.h>
++#include <asm/byteorder.h>
++#include <asm/dma.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/unaligned.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#undef DEBUG
++#undef VERY_NOISY
++
++#define	DRIVER_DESC		"SuperH USB Peripheral Controller"
++#define	DRIVER_VERSION		"alpha (11 November 2003)"
++
++#ifdef USE_DMA
++#error "DMA not supported"
++#endif
++
++static const char driver_name [] = "superh_udc";
++static const char driver_desc [] = DRIVER_DESC;
++
++static const char ep0name [] = "ep0";
++static const char *ep_name [] = {
++	ep0name,
++	"ep1out-bulk",
++	"ep2in-bulk",
++	"ep3in-bulk",
++};
++
++static struct superh_udc *the_controller;
++
++#include "superh_udc.h"
++
++/* High priority interrupts */
++#define F0_HIGH (EP1_FULL | EP2_TR | EP2_EMPTY )
++#define F1_HIGH (0)
++
++/* Low priority interrupts */
++#define F0_LOW  (BRST | SETUP_TS | EP0o_TS | EP0i_TR | EP0i_TS)
++#define F1_LOW  (EP3_TR | EP3_TS | VBUSF)
++
++/* How long to leave the stall bit set - this value is quite critical
++ * to making stalls work.  Unfortunately it doesn't seem possible to
++ * get a value that will work reliably with both fast and slow
++ * machines.
++ */
++#define STALL_TIME     (HZ/75)
++
++/* Number of endpoints to check in the unstall timer.  It should not
++ * be necessary to unstall bulk endpoints using the timer as long as
++ * the gadget code is aware that this device cannot stall properly
++ * (see the file backed storage gadget for an example).  But if the
++ * UDC driver stalls ep0 due to a bad SETUP then the timer is still
++ * required otherwise the stall will never get cleared.  If it is
++ * necessary to unstall all endpoints using the timer then set this to
++ * 4.
++ */
++#define EP_TO_UNSTALL  1
++
++/* Number of packets to wait for before sending a fake
++ * SET_CONFIGURATION to the gadget driver
++ */
++#define DEFAULT_SETUP_COUNT     7
++#define RESET_SETUP_COUNT       2
++
++/* How long to wait for the number of packets specified above */
++#define SETUP_TIME              (HZ/10 )
++
++static void superh_ep_fifo_flush(struct usb_ep *_ep);
++static void stop_activity(struct superh_udc *dev, struct usb_gadget_driver *driver);
++static int superh_ep_set_halt(struct usb_ep *_ep, int value);
++static void udc_timer(unsigned long _dev);
++static struct superh_request* process_ep_req(struct superh_ep *ep,
++					     struct superh_request *req);
++static void done(struct superh_ep *ep, struct superh_request *req, int status);
++
++/*
++ * IO
++ */
++
++static inline void and_b(u8 mask, unsigned long addr)
++{
++	ctrl_outb(ctrl_inb(addr) & mask, addr);
++}
++
++
++static inline void or_b(u8 mask, unsigned long addr)
++{
++	ctrl_outb(ctrl_inb(addr) | mask, addr);
++}
++
++
++static inline void ep0_idle (struct superh_udc *dev)
++{
++	DBG(DBG_VERY_NOISY, "ep0_idle\n");
++	dev->ep0state = EP0_IDLE;
++}
++
++
++static void init_udc_timer(struct superh_udc *dev)
++{
++	init_timer(&dev->timer);
++	dev->timer.function = udc_timer;
++	dev->timer.data = (unsigned long) dev;
++	dev->timer.expires = jiffies + STALL_TIME;
++	add_timer(&dev->timer);
++}
++
++/* Send a fake SET_CONFIGURATION to the gadget to start it up.
++ * Needed because the hardware doesn't let us know when the real packet
++ * has arrived.
++ */
++static void send_fake_config(struct superh_udc *dev)
++{
++	struct usb_ctrlrequest r;
++	dev->fake_config = 1;
++	dev->setup_countdown = 0;
++	r.bRequestType = USB_DIR_OUT | USB_TYPE_STANDARD
++		| USB_RECIP_DEVICE;
++	r.bRequest = USB_REQ_SET_CONFIGURATION;
++	r.wValue = 1;  /* configuration to select */
++	r.wIndex = 0;
++	r.wLength = 0;
++	if (dev->driver->setup(&dev->gadget, &r) < 0) {
++		DMSG("SET_CONFIGURATION failed.\n");
++	}
++}
++
++/*
++ * Timer function.  Clears stall from any stalled endpoints as we
++ * don't get informed when the host has sent a clear feature.
++ */
++static void udc_timer(unsigned long _dev)
++{
++	struct superh_udc	*dev = (void *)_dev;
++	int                      i;
++	unsigned long		flags;
++
++	local_irq_save(flags);
++
++	if (atomic_read(&dev->in_interrupt) == 0) {
++
++		/* Check if a bus reset has been done and we haven't faked a SET_CONFIGURATION */
++		if (dev->gadget.speed != USB_SPEED_UNKNOWN
++		    && dev->setup_countdown > 0
++		    && jiffies - dev->reset_time > SETUP_TIME
++		    &&list_empty(&dev->ep[0].queue)) {
++			send_fake_config(dev);
++		}
++
++		/* Check if any end points are halted and restart them */
++		for (i = 0; i < EP_TO_UNSTALL; i++) {
++			struct superh_ep *ep = &dev->ep[i];
++			if (ep->halted) {
++				DBG(DBG_VERBOSE, "unstalling ep %d\n", i);
++				superh_ep_set_halt(&ep->ep, 0);
++				if (likely (!list_empty(&ep->queue))) {
++					struct superh_request *req
++						= list_entry(ep->queue.next,
++							     struct superh_request, queue);
++					process_ep_req(ep, req);
++				}
++			}
++		}
++	}
++
++	init_udc_timer(dev);
++
++	local_irq_restore(flags);
++}
++
++/*
++ *	done - retire a request; caller blocked irqs
++ */
++static void done(struct superh_ep *ep, struct superh_request *req, int status)
++{
++	unsigned		stopped = ep->stopped;
++
++	DBG(DBG_NOISY, "done: %s %p %d\n", ep->ep.name, req, status);
++
++	list_del_init(&req->queue);
++
++	if (likely (req->req.status == -EINPROGRESS))
++		req->req.status = status;
++	else
++		status = req->req.status;
++
++	if (status && status != -ESHUTDOWN)
++		DBG(DBG_VERBOSE, "complete %s req %p stat %d len %u/%u\n",
++			ep->ep.name, &req->req, status,
++			req->req.actual, req->req.length);
++
++	/* don't modify queue heads during completion callback */
++	ep->stopped = 1;
++	req->req.complete(&ep->ep, &req->req);
++	ep->stopped = stopped;
++}
++
++/*
++ *	Enable interrupts for the specified endpoint
++ */
++static inline void pio_irq_enable(struct superh_ep *ep)
++{
++	or_b(ep->interrupt_mask, ep->interrupt_reg);
++}
++
++/*
++ *	Disable interrupts for the specified endpoint
++ */
++static inline void pio_irq_disable(struct superh_ep *ep)
++{
++	and_b(~ep->interrupt_mask, ep->interrupt_reg);
++}
++
++/*
++ * 	nuke - dequeue ALL requests
++ */
++static void nuke(struct superh_ep *ep, int status)
++{
++	struct superh_request *req;
++
++	DBG(DBG_NOISY, "nuke %s %d\n", ep->ep.name, status);
++
++	/* called with irqs blocked */
++#ifdef	USE_DMA
++	if (ep->dma >= 0 && !ep->stopped)
++		cancel_dma(ep);
++#endif
++	while (!list_empty(&ep->queue)) {
++		req = list_entry(ep->queue.next,
++				struct superh_request,
++				queue);
++		done(ep, req, status);
++	}
++
++	if (ep->desc)
++		pio_irq_disable (ep);
++}
++
++static inline void clear_ep_state (struct superh_udc *dev)
++{
++	unsigned i;
++
++	/* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
++	 * fifos, and pending transactions mustn't be continued in any case.
++	 */
++	for (i = 1; i < 4; i++)
++		nuke(&dev->ep[i], -ECONNABORTED);
++}
++
++/*
++ * write a packet to an endpoint data register
++ */
++static int
++write_packet(u32 epdr, struct superh_request *req, unsigned max)
++{
++	u8		*buf;
++	unsigned	length, count;
++
++	buf = req->req.buf + req->req.actual;
++	prefetch(buf);
++
++	/* how big will this packet be? */
++	length = min(req->req.length - req->req.actual, max);
++	req->req.actual += length;
++
++	count = length;
++	while (likely(count--))
++		ctrl_outb(*buf++, epdr);
++
++	return length;
++}
++
++static int
++write_ep0_fifo (struct superh_ep *ep, struct superh_request *req)
++{
++	unsigned	count;
++	int		is_short;
++
++	count = write_packet(USBEPDR0I, req, EP0_FIFO_SIZE);
++	ep->dev->stats.write.bytes += count;
++
++	/* last packet "must be" short (or a zlp) */
++	is_short = (count != EP0_FIFO_SIZE);
++
++	DBG(DBG_VERY_NOISY, "ep0in %d bytes %d left %p\n", count,
++	  req->req.length - req->req.actual, req);
++
++	ctrl_outb(EP0i_PKTE, USBTRG);
++
++	if (unlikely (is_short)) {
++		ep->dev->ep0state = EP0_END_XFER;
++
++		count = req->req.length;
++		done (ep, req, 0);
++		/*
++		 * If we have received a specified number of setups
++		 * after a bus reset or connect then fake a
++		 * SET_CONFIGURATION to the driver (as we don't get
++		 * them from the hardware).
++		 */
++		if (ep->dev->setup_countdown >= 0)
++			ep->dev->setup_countdown--;
++		if (ep->dev->setup_countdown == 0) {
++			send_fake_config(ep->dev);
++		}
++	}
++
++	return is_short;
++}
++
++/*
++ * handle_ep0_setup
++ *
++ * Handles a SETUP request on EP0
++ */
++static void handle_ep0_setup(struct superh_udc* dev)
++{
++	int i;
++	union { u8 raw [8]; struct usb_ctrlrequest r; } u;
++
++        for (i = 0; i < 8; i++) {
++		u.raw[i] = ctrl_inb(USBEPDR0S);
++        }
++	
++	/* Send ACK */
++	ctrl_outb(EP0s_RDFN, USBTRG);
++
++	le16_to_cpus (&u.r.wValue);
++	le16_to_cpus (&u.r.wIndex);
++	le16_to_cpus (&u.r.wLength);
++
++	DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n",
++	    u.r.bRequestType, u.r.bRequest,
++	    u.r.wValue, u.r.wIndex, u.r.wLength);
++	
++	if (u.r.bRequestType & USB_DIR_IN) {
++		DBG(DBG_VERY_NOISY, "handle_ep0_setup: EP0_IN_DATA_PHASE\n");
++		dev->ep0state = EP0_IN_DATA_PHASE;
++	}
++	else {
++		DBG(DBG_VERY_NOISY, "handle_ep0_setup: EP0_OUT_DATA_PHASE\n");
++		dev->ep0state = EP0_OUT_DATA_PHASE;
++	}
++	
++	i = dev->driver->setup(&dev->gadget, &u.r);
++	if (i < 0) {
++		DMSG("SETUP %02x.%02x v%04x i%04x l%04x failed\n",
++		    u.r.bRequestType, u.r.bRequest,
++		    u.r.wValue, u.r.wIndex, u.r.wLength);
++		superh_ep_set_halt(&dev->ep[0].ep, 1);
++	}
++}
++
++/*
++ * write to an IN endpoint fifo, as many packets as possible.
++ * irqs will use this to write the rest later.
++ * caller guarantees at least one packet buffer is ready.
++ */
++static int
++write_fifo (struct superh_ep *ep, struct superh_request *req)
++{
++	unsigned		max;
++
++	DBG(DBG_VERY_NOISY, "write_fifo\n");
++
++	if ((ep->bEndpointAddress & USB_DIR_IN) != USB_DIR_IN) {
++		DMSG("write_fifo from invalid EP (%s)\n", ep->ep.name);
++		return -EINVAL;
++	}
++
++	max = ep->desc->wMaxPacketSize;
++	do {
++		unsigned	count;
++		int		is_last, is_short;
++
++		count = write_packet(ep->fifo_reg, req, max);
++
++		/* last packet is usually short (or a zlp) */
++		if (unlikely (count != max))
++			is_last = is_short = 1;
++		else {
++			if (likely(req->req.length != req->req.actual)
++					|| req->req.zero)
++				is_last = 0;
++			else
++				is_last = 1;
++			/* interrupt/iso maxpacket may not fill the fifo */
++			is_short = unlikely (max < ep->ep.maxpacket);
++
++			/* FIXME ep.maxpacket should be the current size,
++			 * modified (for periodic endpoints) when the
++			 * ep is enabled.  do that, re-init as needed,
++			 * and change maxpacket refs accordingly.
++			 */
++		}
++
++		DBG(DBG_VERY_NOISY, "wrote %s %d bytes%s%s %d left %p\n",
++			ep->ep.name, count,
++			is_last ? "/L" : "", is_short ? "/S" : "",
++			req->req.length - req->req.actual, req);
++
++		/* let loose that packet. maybe try writing another one,
++		 * double buffering might work.
++		 */
++		or_b(ep->packet_enable_mask, USBTRG);
++
++		/* requests complete when all IN data is in the FIFO */
++		if (is_last) {
++			done (ep, req, 0);
++			if (list_empty(&ep->queue) || unlikely(ep->dma >= 0)) {
++				pio_irq_disable (ep);
++			}
++#ifdef USE_DMA
++			/* TODO */
++			if (unlikely(ep->dma >= 0) && !list_empty(&ep->queue)) {
++				DMSG("%s pio2dma\n", ep->ep.name);
++				req = list_entry(ep->queue.next,
++						struct superh_request, queue);
++				kick_dma(ep,req);
++				return 0;
++			}
++#endif
++			return 1;
++		}
++		/* Only loop if on EP2 as it is double buffered */
++	} while (ep->bEndpointAddress == (2|USB_DIR_IN)
++		 && ctrl_inb(USBIFR0) & EP2_EMPTY);
++	return 0;
++}
++
++/*
++ * read_ep0_fifo - unload packets from ep0 control-out fifo.  caller
++ * should have made sure there's at least one packet ready.
++ *
++ * returns true if the request completed because of short packet or the
++ * request buffer having filled (and maybe overran till end-of-packet).
++ */
++static int
++read_ep0_fifo(struct superh_ep *ep, struct superh_request *req)
++{
++	u8		*buf;
++	unsigned	bufferspace, count;
++
++	DBG(DBG_VERY_NOISY, "read_ep0_fifo\n");
++
++	if (!ep) {
++		DMSG("read_ep0_fifo invalid ep\n");
++		return -EINVAL;
++	}
++
++	if (!req) {
++		DMSG("read_ep0_fifo invalid req\n");
++		return -EINVAL;
++	}
++
++	if (ep->desc != 0) {
++		DMSG("read_ep0_fifo from invalid EP (%s)\n", ep->ep.name);
++		return -EINVAL;
++	}
++	
++	/* make sure there's a packet in the FIFO.
++	 */
++	if (likely ((ctrl_inb(USBIFR0) & EP0o_TS) == 0)) {
++		buf = req->req.buf + req->req.actual;
++		bufferspace = req->req.length - req->req.actual;
++	
++		/* read all bytes from this packet */
++		count = ctrl_inb(USBEPSZ0O);
++		req->req.actual += min (count, bufferspace);
++		DBG(DBG_VERY_NOISY, "read %s %d bytes req %p %d/%d\n",
++		    ep->ep.name, count,
++		    req, req->req.actual, req->req.length);
++		while (likely (count-- != 0)) {
++			u8	byte = ctrl_inb(USBEPDR0O);
++			
++			if (unlikely (bufferspace == 0)) {
++				/* this happens when the driver's buffer
++				 * is smaller than what the host sent.
++				 * discard the extra data.
++				 */
++				if (req->req.status != -EOVERFLOW)
++					DMSG("%s overflow %d\n",
++					     ep->ep.name, count);
++				req->req.status = -EOVERFLOW;
++			} else {
++				*buf++ = byte;
++				bufferspace--;
++			}
++		}
++		
++		/* Send ACK */
++		or_b(EP0o_RDFN, USBTRG);
++
++		/* completion */
++		if (req->req.actual >= req->req.length) {
++			done (ep, req, 0);
++			ep0_idle(ep->dev);
++			return 1;
++		}
++	}
++
++	return 0;
++}
++
++/*
++ * read_fifo -  unload packet(s) from the fifo we use for usb OUT
++ * transfers and put them into the request.  caller should have made
++ * sure there's at least one packet ready.
++ *
++ * returns true if the request completed because of short packet or the
++ * request buffer having filled (and maybe overran till end-of-packet).
++ */
++static int
++read_fifo (struct superh_ep *ep, struct superh_request *req)
++{
++	DBG(DBG_VERY_NOISY, "read_fifo\n");
++
++	if ((ep->bEndpointAddress & 0x0f) != 1) {
++		DMSG("read_fifo from invalid EP (%s)\n", ep->ep.name);
++		return -EINVAL;
++	}
++
++	for (;;) {
++		u8		*buf;
++		unsigned	bufferspace, count, is_short;
++
++		/* make sure there's a packet in the FIFO.
++		 */
++		if (unlikely ((ctrl_inb(USBIFR0) & EP1_FULL) == 0))
++			break;
++		buf = req->req.buf + req->req.actual;
++		bufferspace = req->req.length - req->req.actual;
++
++		/* read all bytes from this packet */
++		count = ctrl_inb(USBEPSZ1);
++		req->req.actual += min (count, bufferspace);
++		is_short = (count < ep->desc->wMaxPacketSize);
++		DBG(DBG_VERY_NOISY, "read %s %d bytes%s req %p %d/%d\n",
++			ep->ep.name, count,
++			is_short ? "/S" : "",
++			req, req->req.actual, req->req.length);
++		while (likely (count-- != 0)) {
++			u8	byte = ctrl_inb(USBEPDR1);
++
++			if (unlikely (bufferspace == 0)) {
++				/* this happens when the driver's buffer
++				 * is smaller than what the host sent.
++				 * discard the extra data.
++				 */
++				if (req->req.status != -EOVERFLOW)
++					DMSG("%s overflow %d\n",
++						ep->ep.name, count);
++				req->req.status = -EOVERFLOW;
++			} else {
++				*buf++ = byte;
++				bufferspace--;
++			}
++		}
++
++		or_b(EP1_RDFN, USBTRG);
++		/* There could now be another packet because of dual buffer */
++
++		/* completion */
++		if (is_short || req->req.actual == req->req.length) {
++			done (ep, req, 0);
++			if (list_empty(&ep->queue))
++				pio_irq_disable (ep);
++			return 1;
++		}
++
++		/* finished that packet.  the next one may be waiting... */
++	}
++	return 0;
++}
++
++/*--------------------------------------------------------------------------*/ 
++/* Interrupt Handler(s)
++ */
++
++/*
++ * superh_udc_irq_f0 - high priority interrupt handler
++ * this deals with data to & from the bulk pipes
++ */
++static void superh_udc_irq_f0(int irq, void *_dev, struct pt_regs *regs)
++{
++	unsigned char             f0_status;
++	struct superh_udc         *dev = (struct superh_udc*) _dev;
++	struct superh_request     *req;
++	struct superh_ep          *ep;
++
++	DBG(DBG_NOISY, "superh_udc_irq_f0 %p\n", dev);
++
++	atomic_inc(&dev->in_interrupt);
++
++	dev->stats.irqs++;
++	dev->stats.irq0s++;
++	f0_status = ctrl_inb(USBIFR0);
++
++	/* Acknowledge interrupts */
++	ctrl_outb(~(f0_status & F0_HIGH), USBIFR0);
++
++	if (f0_status & EP1_FULL) {
++		DBG(DBG_NOISY, "superh_udc_irq_f0 %p: EP1 FULL\n", dev);
++		ep = &dev->ep[1];
++		
++		if (likely (!list_empty(&ep->queue)))
++			req = list_entry(ep->queue.next,
++					 struct superh_request, queue);
++		else
++			req = 0;
++
++		if (req)
++			read_fifo(ep, req);
++		else
++			pio_irq_disable(ep);
++	}
++	
++	if ( f0_status & (EP2_TR | EP2_EMPTY) ) {
++		DBG(DBG_NOISY, "superh_udc_irq_f0 %p: EP2 TR | EP2_EMPTY\n", dev);
++		ep = &dev->ep[2];
++
++		if (likely (!list_empty(&ep->queue)))
++			req = list_entry(ep->queue.next,
++					struct superh_request, queue);
++		else
++			req = 0;
++
++		if (req) {
++			if ((f0_status & EP2_TR) && (f0_status & EP2_EMPTY))
++				write_fifo(ep, req);
++			else
++				and_b(~EP2_EMPTY, USBIER0);
++				
++		}
++		else {
++			pio_irq_disable(ep);
++		}
++	}
++
++	atomic_dec(&dev->in_interrupt);
++}
++
++/**
++ * superh_udc_irq_f1 - low priority interrupt handler
++ *
++ */
++static void superh_udc_irq_f1(int irq, void *_dev, struct pt_regs *regs)
++{
++	unsigned char       f0_status;
++	unsigned char       f1_status;
++	struct superh_udc   *dev = (struct superh_udc*) _dev;
++
++	atomic_inc(&dev->in_interrupt);;
++
++	dev->stats.irqs++;
++	dev->stats.irq1s++;
++
++	f0_status = ctrl_inb(USBIFR0);
++	f1_status = ctrl_inb(USBIFR1);
++
++	/* Acknowledge interrupts */
++	ctrl_outb(~(f0_status & F0_LOW), USBIFR0);
++	ctrl_outb(~(f1_status & F1_LOW), USBIFR1);
++
++	/* VBUSF indicates the USB being connected/disconnected */
++	if (f1_status & VBUSF) {
++		DBG(DBG_VERY_NOISY, "superh_udc_irq_f1[%lx] VBUSF\n", dev->stats.irqs);
++		if (!is_usb_connected) {
++			/* report disconnect just once */
++			if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
++				DMSG("disconnect %s\n",
++					dev->driver ? dev->driver->driver.name : 0);
++				stop_activity(dev, dev->driver);
++			}
++		}
++		else if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
++			DMSG("connect\n");
++			dev->setup_countdown = DEFAULT_SETUP_COUNT;
++		}
++	}
++
++
++
++	/* Bus Reset */
++	if (f0_status & BRST) {
++		int i;
++		DBG(DBG_VERBOSE, "superh_udc_irq_f1[%lx]: BRST bus reset\n", dev->stats.irqs);
++		/* kill any outstanding requests  */
++		for (i = 0; i < 4; i++) {
++			struct superh_ep *ep = &dev->ep[i];
++			nuke(ep, -ESHUTDOWN);
++			ep->halted = 0;
++			ep->stopped = 0;
++		}
++
++		/* reset fifo's and stall's */
++		ctrl_outb( EP3_CLEAR | EP1_CLEAR | EP2_CLEAR | EP0o_CLEAR | EP0i_CLEAR, USBFCLR );
++		ctrl_outb( 0, USBEPSTL );
++		DMSG("gadget driver '%s', address zero\n", dev->driver->driver.name);
++		if (dev->gadget.speed == USB_SPEED_UNKNOWN)
++			init_udc_timer(dev);
++		dev->gadget.speed = USB_SPEED_FULL;
++		memset(&dev->stats, 0, sizeof dev->stats);
++		if (dev->setup_countdown < 0)
++			dev->setup_countdown = RESET_SETUP_COUNT;
++		dev->reset_time = jiffies;
++		dev->fake_config = 0;
++		ep0_idle(dev);
++	}
++
++        /* EPOi Transmit Complete - data to host on EP0 ACKed
++	 * EP0i Transfer Request - no data in FIFO to send on EP0
++         * either way we send next data if there is any and the FIFO is not busy
++	 * it will interrupt again if we later if we don't send anything.
++	 */
++	if ((f0_status & EP0i_TR || f0_status & EP0i_TS)
++	    && (ctrl_inb(USBDASTS) & EP0i_DE) == 0) {
++		struct superh_ep	*ep = &dev->ep[0];
++		struct superh_request	*req;
++		DBG(DBG_VERY_NOISY, "superh_udc_irq_f1[%lx]: ep0i TR\n", dev->stats.irqs);
++		if (!list_empty(&ep->queue)) {
++			req = list_entry(ep->queue.next, struct superh_request, queue);
++			write_ep0_fifo(ep, req);
++		}
++		or_b(EP0i_PKTE, USBTRG);
++	}
++
++	/* Setup Command Receive Complete */
++	if (f0_status & SETUP_TS) {
++		DBG(DBG_NOISY, "superh_udc_irq_f1[%lx]: SETUP TS\n", dev->stats.irqs);
++		or_b( EP0o_CLEAR | EP0i_CLEAR, USBFCLR);
++		handle_ep0_setup(dev);
++	}
++
++	/* EPOo Receive Complete - EP0 has received data from host */
++	if (f0_status & EP0o_TS) {
++		struct superh_request     *req;
++		struct superh_ep          *ep;
++		DBG(DBG_VERY_NOISY, "superh_int_hndlr_f1[%lx]: ep0o TS\n", dev->stats.irqs);
++		ep = &dev->ep[0];
++
++		if (likely (!list_empty(&ep->queue)))
++			req = list_entry(ep->queue.next,
++					 struct superh_request, queue);
++		else
++			req = 0;
++
++		if (req)
++			read_ep0_fifo(ep, req);
++	}
++
++	/* EP3 Transmit Request & Transmit Complete */
++	if ( f1_status & (EP3_TR | EP3_TS) ) {
++		struct superh_request     *req;
++		struct superh_ep          *ep;
++		DBG(DBG_VERY_NOISY, "superh_udc_irq_f1[%lx]: EP3 TR | EP3_TS (%x)\n", dev->stats.irqs, f1_status);
++		ep = &dev->ep[3];
++
++		if (likely (!list_empty(&ep->queue)))
++			req = list_entry(ep->queue.next,
++					struct superh_request, queue);
++		else
++			req = 0;
++
++		if (req) {
++			if ((f1_status & EP3_TR) && (ctrl_inb(USBDASTS) & EP3_DE) == 0)
++				write_fifo(ep, req);
++			
++		}
++		else {
++			pio_irq_disable(ep);
++		}
++	}
++
++	atomic_dec(&dev->in_interrupt);;
++}
++
++
++/*--------------------------------------------------------------------------*/ 
++
++/*
++ * endpoint enable/disable
++ *
++ * we need to verify the descriptors used to enable endpoints.  since superh
++ * endpoint configurations are fixed, and are pretty much always enabled,
++ * there's not a lot to manage here.
++ *
++ */
++static int superh_ep_enable (struct usb_ep *_ep,
++		const struct usb_endpoint_descriptor *desc)
++{
++	struct superh_ep        *ep;
++	struct superh_udc       *dev;
++
++	DBG(DBG_NOISY, "superh_ep_enable\n");
++
++	ep = container_of (_ep, struct superh_ep, ep);
++	if (!_ep || !desc || ep->desc || _ep->name == ep0name
++			|| desc->bDescriptorType != USB_DT_ENDPOINT
++			|| ep->bEndpointAddress != desc->bEndpointAddress
++			|| ep->ep.maxpacket < desc->wMaxPacketSize) {
++		DMSG("%s, bad ep or descriptor\n", __FUNCTION__);
++		return -EINVAL;
++	}
++
++	/* xfer types must match, except that interrupt ~= bulk */
++	if (ep->bmAttributes != desc->bmAttributes
++			&& ep->bmAttributes != USB_ENDPOINT_XFER_BULK
++			&& desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
++		DMSG("%s, %s type mismatch\n", __FUNCTION__, _ep->name);
++		return -EINVAL;
++	}
++
++#if 0
++	/* hardware _could_ do smaller, but driver doesn't */
++	if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
++				&& desc->wMaxPacketSize != BULK_FIFO_SIZE)
++			|| !desc->wMaxPacketSize) {
++		DMSG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
++		return -ERANGE;
++	}
++#endif
++
++	dev = ep->dev;
++	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
++		DMSG("%s, bogus device state\n", __FUNCTION__);
++		return -ESHUTDOWN;
++	}
++
++	ep->desc = desc;
++	ep->dma = -1;
++	ep->stopped = 0;
++
++	/* flush fifo (mostly for OUT buffers), enable irq */
++	superh_ep_fifo_flush (_ep);
++
++	/* ... reset halt state too, if we could ... */
++
++#ifdef	USE_DMA
++
++#endif
++
++	DBG(DBG_VERBOSE, "enabled %s\n", _ep->name);
++	return 0;
++}
++
++static int superh_ep_disable (struct usb_ep *_ep)
++{
++	struct superh_ep	*ep;
++
++	DBG(DBG_NOISY, "superh_ep_disable\n");
++
++	ep = container_of (_ep, struct superh_ep, ep);
++	if (!_ep || !ep->desc) {
++		DMSG("%s, %s not enabled\n", __FUNCTION__,
++			_ep ? ep->ep.name : NULL);
++		return -EINVAL;
++	}
++	nuke (ep, -ESHUTDOWN);
++
++#ifdef	USE_DMA
++	/* TODO */
++	if (ep->dma >= 0) {
++		*ep->reg_drcmr = 0;
++		pxa_free_dma (ep->dma);
++		ep->dma = -1;
++	}
++#endif
++
++	/* flush fifo (mostly for IN buffers) */
++	superh_ep_fifo_flush (_ep);
++
++	ep->desc = 0;
++	ep->stopped = 1;
++
++	DBG(DBG_VERBOSE, "%s disabled\n", _ep->name);
++	return 0;
++}
++
++/* for the superh, these can just wrap kmalloc/kfree.  gadget drivers
++ * must still pass correctly initialized endpoints, since other controller
++ * drivers may care about how it's currently set up (dma issues etc).
++ */
++
++/*
++ * 	superh_ep_alloc_request - allocate a request data structure
++ */
++static struct usb_request *
++superh_ep_alloc_request (struct usb_ep *_ep, int gfp_flags)
++{
++	struct superh_request *req;
++
++	/* FIXME for bulk out-dma endpoints, preallocate a frame's worth of
++	 * (aligned) dma descriptors at the end of the request
++	 */
++
++	req = kmalloc (sizeof *req, gfp_flags);
++	if (!req)
++		return 0;
++
++	memset (req, 0, sizeof *req);
++	INIT_LIST_HEAD (&req->queue);
++	DBG(DBG_VERY_NOISY, "superh_ep_alloc_request: %p %d\n", req, list_empty(&req->queue));
++
++	return &req->req;
++}
++
++/*
++ * 	superh_ep_free_request - deallocate a request data structure
++ */
++static void
++superh_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct superh_request	*req;
++
++	req = container_of (_req, struct superh_request, req);
++	WARN_ON (!list_empty (&req->queue));
++	kfree(req);
++}
++
++/* SH cache needs flushing with DMA I/O (it's dma-incoherent), but there's
++ * no device-affinity and the heap works perfectly well for i/o buffers.
++ * TODO: check this
++ */
++static void *
++superh_ep_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
++		       dma_addr_t *dma, int gfp_flags)
++{
++	char			*retval;
++
++	retval = kmalloc (bytes, gfp_flags);
++	if (retval)
++		*dma = virt_to_bus (retval);
++	return retval;
++}
++
++static void
++superh_ep_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma,
++		unsigned bytes)
++{
++	kfree (buf);
++}
++
++static struct superh_request*
++process_ep_req(struct superh_ep *ep, struct superh_request *req)
++{
++	struct superh_udc *dev = ep->dev;
++
++	if (ep->desc == 0 /* ep0 */) {
++		switch (dev->ep0state) {
++		case EP0_IN_DATA_PHASE:
++			DBG(DBG_VERY_NOISY, "superh_ep_queue: EP0_IN_DATA_PHASE\n");
++			dev->stats.write.ops++;
++			if (write_ep0_fifo(ep, req))
++				req = 0;
++			break;
++			
++		case EP0_OUT_DATA_PHASE:
++			DBG(DBG_VERY_NOISY, "superh_ep_queue: EP0_OUT_DATA_PHASE\n");
++			dev->stats.read.ops++;
++			if (read_ep0_fifo(ep, req))
++				req = 0;
++			break;
++			
++		default:
++			DMSG("ep0 i/o, odd state %d\n", dev->ep0state);
++			return 0;
++		}
++#ifdef	USE_DMA
++		/* either start dma or prime pio pump */
++	}
++	else if (ep->dma >= 0) {
++		kick_dma(ep, req);
++#endif
++		/* can the FIFO can satisfy the request immediately? */
++	}
++	else if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
++		if ((ep->desc->bEndpointAddress & 0x0f) == 2
++		    && (ctrl_inb(USBIFR0) & EP2_TR) != 0
++		    && write_fifo(ep, req)) {
++			req = 0;
++		}
++		else if ((ep->desc->bEndpointAddress & 0x0f) == 3
++		    && (ctrl_inb(USBIFR1) & EP3_TR) != 0
++		    && write_fifo(ep, req)) {
++			req = 0;
++		}
++	}
++
++	if (likely (((req && ep->desc) && ep->dma < 0) || ep->desc == 0))
++		pio_irq_enable(ep);
++
++	return req;
++} 
++
++
++static int
++superh_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
++{
++	struct superh_request	*req;
++	struct superh_ep	*ep;
++	struct superh_udc	*dev;
++	unsigned long		flags;
++
++	req = container_of(_req, struct superh_request, req);
++	ep = container_of(_ep, struct superh_ep, ep);
++
++	DBG(DBG_VERY_NOISY, "superh_ep_queue\n");
++
++	/* If we have just sent a fake configuration request then
++	 * this is the reply.  We don't want to send it to the host
++	 * so just ignore it.
++	 */
++	if (ep->desc == 0 /* ep0 */ && ep->dev->fake_config) {
++		DBG(DBG_NOISY, "Ignoring bogus SET_CONFIGURATION response\n");
++		done(ep, req, 0);
++		ep->dev->fake_config = 0;
++		return 1;
++	}
++
++	if (unlikely (!_req || !_req->complete || !_req->buf
++		      || !list_empty(&req->queue))) {
++		DMSG("%s, bad params %s, %p, %p, %p, %d\n", __FUNCTION__,
++		     ep->ep.name, _req, _req->complete, _req->buf,
++		     list_empty(&req->queue));
++		return -EINVAL;
++	}
++
++	if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return -EINVAL;
++	}
++
++	dev = ep->dev;
++	if (unlikely (!dev->driver
++			|| dev->gadget.speed == USB_SPEED_UNKNOWN)) {
++		DMSG("%s, bogus device state\n", __FUNCTION__);
++		return -ESHUTDOWN;
++	}
++
++#ifdef	USE_DMA
++	/* TODO */
++	if (ep->dma >= 0) {
++		unsigned long	start = (unsigned long) _req->buf;
++
++		clean_dcache_range(start, start + _req->length);
++		/* or for USB_DIR_OUT, invalidate_dcache_range (...) */
++	}
++#endif
++
++	DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n",
++	     _ep->name, _req, _req->length, _req->buf);
++
++	local_irq_save(flags);
++
++	_req->status = -EINPROGRESS;
++	_req->actual = 0;
++
++	/* kickstart this i/o queue? */
++	if (list_empty(&ep->queue) && !ep->stopped && !ep->halted) {
++		req = process_ep_req(ep, req);
++	}
++	
++	/* pio or dma irq handler advances the queue. */
++	if (likely (req != 0))
++		list_add_tail(&req->queue, &ep->queue);
++
++	local_irq_restore(flags);
++
++	return 0;
++}
++
++static int
++superh_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
++{
++	struct superh_ep	*ep;
++	struct superh_request	*req;
++	unsigned long		flags;
++
++	DBG(DBG_NOISY, "superh_ep_dequeue %s\n", _ep->name);
++
++	ep = container_of(_ep, struct superh_ep, ep);
++	req = container_of(_req, struct superh_request, req);
++	if (!_ep || !_req || ep->ep.name == ep0name)
++		return -EINVAL;
++
++	local_irq_save(flags);
++#ifdef	USE_DMA
++	if (ep->dma >= 0 && ep->queue.next == &req->queue && !ep->stopped) {
++		cancel_dma(ep);
++		done(ep, req, -ECONNRESET);
++		/* restart i/o */
++		if (!list_empty(&ep->queue)) {
++			req = list_entry(ep->queue.next,
++					struct superh_request, queue);
++			kick_dma(ep, req);
++		}
++	} else
++#endif
++	if (!list_empty(&req->queue))
++		done(ep, req, -ECONNRESET);
++	else
++		req = 0;
++	local_irq_restore(flags);
++
++	return req ? 0 : -EOPNOTSUPP;
++}
++
++/* stall/unstall an endpoint, 0 clears the stall, 1 sets it */
++static int
++superh_ep_set_halt(struct usb_ep *_ep, int value)
++{
++	struct superh_ep	*ep;
++	unsigned long		flags;
++
++	ep = container_of(_ep, struct superh_ep, ep);
++	if (unlikely (!_ep
++			|| (!ep->desc && ep->ep.name != ep0name))
++			|| ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return -EINVAL;
++	}
++
++	if (ep->halted == value)
++		return 0;
++
++	local_irq_save(flags);
++
++	if (value == 1 && (ep->bEndpointAddress & USB_DIR_IN) != 0
++	    && ((ctrl_inb(USBDASTS) & ep->data_present_mask) != 0
++		|| !list_empty(&ep->queue))) {
++		local_irq_restore(flags);
++		DBG(DBG_VERBOSE, "Can't %s on %s\n", value ? " halt" : "clear halt", _ep->name);
++		return -EAGAIN;
++	}
++
++	if (value) {
++		or_b(ep->stall_mask, USBEPSTL);
++		if (!ep->desc) {
++			ep->dev->ep0state = EP0_STALL;
++		}
++		/* disable ep interrupts and set a timer to clear the stall */
++		pio_irq_disable(ep);
++		mod_timer(&ep->dev->timer, jiffies + STALL_TIME);
++	}
++	else {
++		and_b(~ep->stall_mask, USBEPSTL);
++	}
++
++	ep->halted = value;
++
++	local_irq_restore(flags);
++
++	DBG(DBG_VERBOSE, "%s %s\n", _ep->name, value ? " halt" : "clear halt");
++
++	return 0;
++}
++
++static int superh_ep_fifo_status(struct usb_ep *_ep)
++{
++	struct superh_ep        *ep;
++
++	DBG(DBG_NOISY, "superh_ep_fifo_status\n");
++
++	ep = container_of(_ep, struct superh_ep, ep);
++	if (!_ep) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return -ENODEV;
++	}
++	if ((ep->bEndpointAddress & USB_DIR_IN) != 0)
++		return -EOPNOTSUPP;
++	if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
++		return 0;
++	else {
++		switch (ep->desc->bEndpointAddress & 0x0f) {
++		case 0:
++			return ctrl_inb(USBEPSZ0O);
++		case 1:
++			return ctrl_inb(USBEPSZ1);
++		}
++	}
++	
++	return 0;
++}
++
++static void superh_ep_fifo_flush(struct usb_ep *_ep)
++{
++	struct superh_ep        *ep;
++
++	DBG(DBG_NOISY, "superh_ep_fifo_flush\n");
++
++	ep = container_of(_ep, struct superh_ep, ep);
++	if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) {
++		DMSG("%s, bad ep\n", __FUNCTION__);
++		return;
++	}
++
++	or_b(ep->clear_mask, USBFCLR);
++}
++
++static struct usb_ep_ops superh_ep_ops = {
++	.enable		= superh_ep_enable,
++	.disable	= superh_ep_disable,
++
++	.alloc_request	= superh_ep_alloc_request,
++	.free_request	= superh_ep_free_request,
++
++	.alloc_buffer	= superh_ep_alloc_buffer,
++	.free_buffer	= superh_ep_free_buffer,
++
++	.queue		= superh_ep_queue,
++	.dequeue	= superh_ep_dequeue,
++
++	.set_halt	= superh_ep_set_halt,
++	.fifo_status	= superh_ep_fifo_status,
++	.fifo_flush	= superh_ep_fifo_flush,
++};
++
++/* ---------------------------------------------------------------------------
++ * 	device-scoped parts of the api to the usb controller hardware
++ * ---------------------------------------------------------------------------
++ */
++
++static int superh_udc_get_frame(struct usb_gadget *_gadget)
++{
++	DBG(DBG_VERY_NOISY, "superh_udc_get_frame\n");
++
++	return -EOPNOTSUPP;
++}
++
++static const struct usb_gadget_ops superh_udc_ops = {
++	.get_frame	 = superh_udc_get_frame,
++	// no remote wakeup
++	// always selfpowered
++};
++
++
++/* if we're trying to save space, don't bother with this proc file */
++
++#if defined(CONFIG_PROC_FS) && !defined(CONFIG_EMBEDDED)
++#  define	UDC_PROC_FILE
++#endif
++
++#ifdef UDC_PROC_FILE
++
++static const char proc_node_name [] = "driver/udc";
++
++static int
++udc_proc_read(char *page, char **start, off_t off, int count,
++		int *eof, void *_dev)
++{
++	char			*buf = page;
++	struct superh_udc	*dev = _dev;
++	char			*next = buf;
++	unsigned		size = count;
++	unsigned long		flags;
++	int			t;
++	int			i;
++
++	local_irq_save(flags);
++
++	/* basic device status */
++	t = snprintf(next, size,
++		"%s\n%s version: %s\nGadget driver: %s\nHost %s\n\n",
++		driver_desc,
++		driver_name, DRIVER_VERSION,
++		dev->driver ? dev->driver->driver.name : "(none)",
++		is_usb_connected ? "full speed" : "disconnected");
++	size -= t;
++	next += t;
++
++	/* device registers */
++	t = snprintf(next, size,
++		     "ifr0 %02X, ifr1 %02X, isr0 %02X, isr1 %02X, ier0 %02X, ier1 %02X\n",
++		     ctrl_inb(USBIFR0), ctrl_inb(USBIFR1),
++		     ctrl_inb(USBISR0), ctrl_inb(USBISR1),
++		     ctrl_inb(USBIER0), ctrl_inb(USBIER1));
++	size -= t;
++	next += t;
++
++	t = snprintf(next, size,
++		     "epsz0o %02X, epsz1 %02X, dasts %02X, dmar %02X\n",
++		     ctrl_inb(USBEPSZ0O), ctrl_inb(USBEPSZ1),
++		     ctrl_inb(USBDASTS), ctrl_inb(USBDMA));
++	size -= t;
++	next += t;
++
++	t = snprintf(next, size,
++		     "epstl %02X, xvercr %02X\n",
++		     ctrl_inb(USBEPSTL), ctrl_inb(USBXVERCR));
++	size -= t;
++	next += t;
++
++	if (!is_usb_connected || !dev->driver)
++		goto done;
++
++	t = snprintf(next, size, "ep0 IN %lu/%lu, OUT %lu/%lu; irq0s %lu; irq1s %lu\n\n",
++		dev->stats.write.bytes, dev->stats.write.ops,
++		dev->stats.read.bytes, dev->stats.read.ops,
++		dev->stats.irq0s, dev->stats.irq1s);
++	size -= t;
++	next += t;
++
++	/* dump endpoint queues */
++	for (i = 0; i < 4; i++) {
++		struct superh_ep	*ep = &dev->ep [i];
++		struct superh_request	*req;
++		int			t;
++
++		if (i != 0) {
++			const struct usb_endpoint_descriptor	*d;
++
++			d = ep->desc;
++			if (!d)
++				continue;
++			t = snprintf(next, size,
++				"%s max %d %s\n",
++				ep->ep.name, le16_to_cpu (d->wMaxPacketSize),
++				(ep->dma >= 0) ? "dma" : "pio");
++
++		} else /* ep0 should only have one transfer queued */
++			t = snprintf(next, size, "ep0 max 8 pio\n");
++		if (t <= 0 || t > size)
++			goto done;
++		size -= t;
++		next += t;
++
++		if (list_empty(&ep->queue)) {
++			t = snprintf(next, size, "\t(nothing queued)\n");
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++			continue;
++		}
++		list_for_each_entry(req, &ep->queue, queue) {
++#ifdef	USE_DMA
++			if (ep->dma >= 0 && req->queue.prev == &ep->queue)
++				t = snprintf(next, size,
++					"\treq %p len %d/%d "
++					"buf %p (dma%d dcmd %08x)\n",
++					&req->req, req->req.actual,
++					req->req.length, req->req.buf,
++					ep->dma, DCMD(ep->dma)
++					// low 13 bits == bytes-to-go
++					);
++			else
++#endif
++				t = snprintf(next, size,
++					"\treq %p len %d/%d buf %p\n",
++					&req->req, req->req.actual,
++					req->req.length, req->req.buf);
++			if (t <= 0 || t > size)
++				goto done;
++			size -= t;
++			next += t;
++		}
++	}
++
++done:
++	local_irq_restore(flags);
++	return count - size;
++}
++
++#endif	/* UDC_PROC_FILE */
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * 	udc_disable - disable USB device controller
++ */
++static void udc_disable(struct superh_udc *dev)
++{
++	/* block all irqs */
++	ctrl_outb( 0, USBIER0);
++	ctrl_outb( 0, USBIER1);
++
++	/* Disable the USB module */
++	or_b(0x80, STBCR3);
++	
++	/* Disable the USB clock */
++	ctrl_outw(0xA500, UCLKCR);
++
++	ep0_idle (dev);
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++}
++
++/*
++ * 	udc_reinit - initialize software state
++ */
++static void udc_reinit(struct superh_udc *dev)
++{
++	u32	i;
++
++	/* device/ep0 records init */
++	INIT_LIST_HEAD (&dev->gadget.ep_list);
++	dev->gadget.ep0 = &dev->ep[0].ep;
++	INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
++	dev->ep0state = EP0_IDLE;
++
++	/* basic endpoint records init */
++	for (i = 0; i < 4; i++) {
++		struct superh_ep *ep = &dev->ep[i];
++
++		ep->ep.name = ep_name[i];
++		ep->ep.ops = &superh_ep_ops;
++		if (i != 0)
++			list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
++
++		ep->dev = dev;
++		ep->desc = 0;
++		ep->stopped = 0;
++		ep->halted = 0;
++		ep->dma = -1;
++		INIT_LIST_HEAD (&ep->queue);
++
++		/* address may need USB_DIR_IN, attributes likely wrong */
++		ep->bEndpointAddress = i;
++		ep->bmAttributes = USB_ENDPOINT_XFER_BULK;
++	}
++
++	/* TODO at least from here on, static initialization
++	 * would work just as well and would need less code space
++	 */
++
++	/* ep0 == control */
++	dev->ep[ 0].ep.maxpacket   = EP0_FIFO_SIZE;
++	dev->ep[ 0].data_present_mask = EP0i_DE;
++	dev->ep[ 0].stall_mask = EP0_STL;
++	dev->ep[ 0].interrupt_mask = EP0o_TS | EP0i_TR | EP0i_TS;
++	dev->ep[ 0].interrupt_reg = USBIER0;
++	dev->ep[ 0].clear_mask = EP0i_CLEAR | EP0o_CLEAR;
++	dev->ep[ 0].fifo_reg = 0;
++	dev->ep[ 0].packet_enable_mask = 0;
++
++	dev->ep[ 1].ep.maxpacket   = BULK_FIFO_SIZE;
++	dev->ep[ 1].bEndpointAddress |= USB_DIR_OUT;
++	dev->ep[ 1].data_present_mask = 0x00;
++	dev->ep[ 1].stall_mask = EP1_STL;
++	dev->ep[ 1].interrupt_mask = EP1_FULL;
++	dev->ep[ 1].interrupt_reg = USBIER0;
++	dev->ep[ 1].clear_mask = EP1_CLEAR;
++	dev->ep[ 1].fifo_reg = 0;
++	dev->ep[ 1].packet_enable_mask = 0;
++
++	dev->ep[ 2].ep.maxpacket   = BULK_FIFO_SIZE;
++	dev->ep[ 2].bEndpointAddress |= USB_DIR_IN;
++	dev->ep[ 2].data_present_mask = EP2_DE;
++	dev->ep[ 2].stall_mask = EP2_STL;
++	dev->ep[ 2].interrupt_mask = EP2_TR | EP2_EMPTY;
++	dev->ep[ 2].interrupt_reg = USBIER0;
++	dev->ep[ 2].clear_mask = EP2_CLEAR;
++	dev->ep[ 2].fifo_reg = USBEPDR2;
++	dev->ep[ 2].packet_enable_mask = EP2_PKTE;
++
++	dev->ep[ 3].ep.maxpacket   = INT_FIFO_SIZE;
++	dev->ep[ 3].bEndpointAddress |= USB_DIR_IN;
++	dev->ep[ 3].data_present_mask = EP3_DE;
++	dev->ep[ 3].stall_mask = EP3_STL;
++	dev->ep[ 3].interrupt_mask = EP3_TR | EP3_TS;
++	dev->ep[ 3].interrupt_reg = USBIER1;
++	dev->ep[ 3].clear_mask = EP3_CLEAR;
++	dev->ep[ 3].fifo_reg = USBEPDR3;
++	dev->ep[ 3].packet_enable_mask = EP3_PKTE;
++}
++
++/* until it's enabled, this UDC should be completely invisible
++ * to any USB host.
++ */
++static void udc_enable (struct superh_udc *dev)
++{
++#if defined(CONFIG_CPU_SUBTYPE_SH7727)
++	// Reset and then Select Function USB1_pwr_en out (USB) c.f. Section 26, Table 26.1 PTE2
++	and_w(PN_PB2_MSK, PECR);
++	or_w(PN_PB2_OF, PECR);
++
++	// Reset and then Select Function UCLK c.f. Section 26, Table 26.1, PTD6
++	and_w(PN_PB6_MSK, PDCR);
++	or_w(PN_PB6_OF, PDCR);
++
++	// Stop USB module prior to setting clocks c.f. Section 9.2.3
++	and_b(~MSTP14, STBCR3);
++	or_b(MSTP14, STBCR3);
++
++	// Select external clock, 1/1 divisor c.f. Section 11.3.1
++	or_b(USBDIV_11|USBCKS_EC, EXCPGCR);
++
++	// Start USB c.f. Section 9.2.3
++	and_b(~MSTP14, STBCR3);
++
++	// Disable pullup c.f. Section 23.5.19
++	or_b(PULLUP_E, USBDMA);
++	//and_b(~PULLUP_E, USBDMA);
++
++	// Set port 1 to function, disabled c.f. Section 22.2.1
++	or_w(USB_TRANS_TRAN | USB_SEL_FUNC, EXPFC);
++
++	// Enable pullup c.f. Section 23.5.19a
++	and_b(~PULLUP_E, USBDMA);
++	//or_b(PULLUP_E, USBDMA);
++#elif defined(CONFIG_CPU_SUBTYPE_SH7705)
++	/* Disable the USB module */
++	or_b(0x80, STBCR3);
++	
++	/* Set the clock to external & enable */
++	ctrl_outw(0xA5E0, UCLKCR);
++
++	/* Enable the USB module */
++	and_b(0x7f, STBCR3);
++
++	/* Enable USB pins. */
++	ctrl_outw(0x01FD, PMCR);	/* VBUS */
++	or_b(PULLUP_E, PMDR);
++#endif
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++	dev->stats.irqs = 0;
++	dev->stats.irq0s = 0;
++	dev->stats.irq1s = 0;
++
++	// reset fifo's and stall's
++	or_b( EP3_CLEAR | EP1_CLEAR | EP2_CLEAR | EP0o_CLEAR | EP0i_CLEAR, USBFCLR);
++	or_b(0, USBEPSTL);
++
++	/* Setup interrupt priority by using the interrupt select registers */
++	ctrl_outb(F0_LOW, USBISR0);
++	ctrl_outb(F1_LOW, USBISR1);
++
++	/* Enable some interrupts */
++	or_b( BRST | SETUP_TS | EP0o_TS | EP0i_TR | EP0i_TS, USBIER0);
++	or_b( VBUSF, USBIER1);
++}
++
++/* when a driver is successfully registered, it will receive
++ * control requests including set_configuration(), which enables
++ * non-control requests.  then usb traffic follows until a
++ * disconnect is reported.  then a host may connect again, or
++ * the driver might get unbound.
++ */
++int usb_gadget_register_driver(struct usb_gadget_driver *driver)
++{
++	struct superh_udc	*dev = the_controller;
++	int			retval;
++
++	if (!driver
++	    /*|| driver->speed != USB_SPEED_FULL
++			|| !driver->bind
++			|| !driver->unbind
++			|| !driver->disconnect
++			|| !driver->setup*/)
++		return -EINVAL;
++	if (!dev)
++		return -ENODEV;
++	if (dev->driver)
++		return -EBUSY;
++
++	/* first hook up the driver ... */
++	dev->driver = driver;
++
++	retval = driver->bind(&dev->gadget);
++	if (retval) {
++		DMSG("bind to driver %s --> error %d\n",
++				driver->driver.name, retval);
++		dev->driver = 0;
++		return retval;
++	}
++
++	/* ... then enable host detection and ep0; and we're ready
++	 * for set_configuration as well as eventual disconnect.
++	 * NOTE:  this shouldn't power up until later.
++	 */
++	udc_enable(dev);
++
++	DMSG("registered gadget driver '%s'\n", driver->driver.name);
++	dump_state(dev);
++	return 0;
++}
++
++EXPORT_SYMBOL(usb_gadget_register_driver);
++
++static void
++stop_activity(struct superh_udc *dev, struct usb_gadget_driver *driver)
++{
++	int i;
++
++	/* don't disconnect drivers more than once */
++	if (dev->gadget.speed == USB_SPEED_UNKNOWN)
++		driver = 0;
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++
++	/* prevent new request submissions, kill any outstanding requests  */
++	for (i = 0; i < 4; i++) {
++		struct superh_ep *ep = &dev->ep[i];
++
++		ep->stopped = 1;
++		nuke(ep, -ESHUTDOWN);
++	}
++
++	del_timer_sync(&dev->timer);
++
++	/* report disconnect; the driver is already quiesced */
++	if (driver)
++		driver->disconnect(&dev->gadget);
++
++	/* re-init driver-visible data structures */
++	udc_reinit(dev);
++}
++
++int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
++{
++	struct superh_udc	*dev = the_controller;
++
++	if (!dev)
++		return -ENODEV;
++	if (!driver || driver != dev->driver)
++		return -EINVAL;
++
++	local_irq_disable();
++	udc_disable(dev);
++	stop_activity(dev, driver);
++	driver->unbind(&dev->gadget);
++	dev->driver = 0;
++	local_irq_enable();
++
++	DMSG("unregistered gadget driver '%s'\n", driver->driver.name);
++	dump_state(dev);
++	return 0;
++}
++
++EXPORT_SYMBOL(usb_gadget_unregister_driver);
++
++
++/*-------------------------------------------------------------------------*/
++
++#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,40)
++MODULE_DESCRIPTION(driver_desc);
++#endif
++MODULE_AUTHOR("Julian Back");
++MODULE_LICENSE("GPL");
++
++/*
++ *	cleanup - free resources allocated during init
++ */
++static void /*__exit and */ __init cleanup(void)
++{
++	struct superh_udc *dev = the_controller;
++
++	if (!dev)
++		return;
++
++	udc_disable(dev);
++#ifdef	UDC_PROC_FILE
++	remove_proc_entry(proc_node_name, NULL);
++#endif
++	usb_gadget_unregister_driver(dev->driver);
++
++	if (dev->got_irq0) {
++		free_irq(USBF0_IRQ, dev);
++		dev->got_irq0 = 0;
++	}
++
++	if (dev->got_irq1) {
++		free_irq(USBF1_IRQ, dev);
++		dev->got_irq1 = 0;
++	}
++
++	the_controller = 0;
++}
++module_exit (cleanup);
++
++/*
++ * 	init - allocate resources
++ */
++static int __init init(void)
++{
++	static struct superh_udc memory;
++
++	struct superh_udc *dev;
++	int retval;
++
++	printk(KERN_DEBUG "%s: version %s\n", driver_name, DRIVER_VERSION);
++
++	/* initialize data */
++	dev = &memory;
++
++	memset(dev, 0, sizeof *dev);
++	dev->gadget.ops = &superh_udc_ops;
++	dev->gadget.name = driver_name;
++	dev->gadget.dev.bus_id = "udc";
++	dev->gadget.speed = USB_SPEED_UNKNOWN;
++
++	dev->vbusmn = 0;
++
++	atomic_set(&dev->in_interrupt, 0);
++
++	the_controller = dev;
++	udc_disable(dev);
++	udc_reinit(dev);
++
++	/* irq setup after old hardware state is cleaned up */
++	retval = request_irq(USBF0_IRQ, superh_udc_irq_f0,
++			     0/*SA_INTERRUPT | SA_SAMPLE_RANDOM*/,
++			     driver_name, dev);
++	if (retval != 0) {
++		printk(KERN_ERR "%s: can't get irq %i, err %d\n",
++		       driver_name, USBF0_IRQ, retval);
++		goto failed;
++	}
++	dev->got_irq0 = 1;
++
++	retval = request_irq(USBF1_IRQ, superh_udc_irq_f1,
++			     0/*SA_INTERRUPT | SA_SAMPLE_RANDOM*/,
++			     driver_name, dev);
++	if (retval != 0) {
++		printk(KERN_ERR "%s: can't get irq %i, err %d\n",
++		       driver_name, USBF1_IRQ, retval);
++		goto failed;
++	}
++	dev->got_irq1 = 1;
++
++	printk(KERN_INFO "%s, IRQs %d %d\n", driver_desc,
++	       USBF0_IRQ, USBF1_IRQ);
++	dump_state(dev);
++
++	dev->setup_countdown = DEFAULT_SETUP_COUNT;
++
++#ifdef	UDC_PROC_FILE
++	create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev);
++#endif
++
++	return 0;
++
++failed:
++	cleanup();
++	return retval;
++}
++module_init (init);
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/superh_udc.h kernel/drivers/usb/gadget/superh_udc.h
+--- /tmp/kernel/drivers/usb/gadget/superh_udc.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/superh_udc.h	2005-04-22 17:53:19.513526654 +0200
+@@ -0,0 +1,363 @@
++/*
++ * Renesas SuperH USB 1.1 device controller (found on SH7705, SH7727...)
++ *
++ * Copyright (C) 2003 Renesas Technology Europe Limited
++ * Copyright (C) 2003 Julian Back (jback@mpc-data.co.uk), MPC Data Limited
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++#ifndef __LINUX_USB_GADGET_SUPERH_UDC_H
++#define __LINUX_USB_GADGET_SUPERH_UDC_H
++
++#include <linux/types.h>
++
++struct superh_udc;
++
++struct superh_ep {
++	struct usb_ep				ep;
++	struct superh_udc			*dev;
++
++	const struct usb_endpoint_descriptor	*desc;
++	struct list_head			queue;
++	int					dma; 
++
++	u8					bEndpointAddress;
++	u8					bmAttributes;
++
++	unsigned				stopped : 1;
++	unsigned                                halted : 1;
++
++	u8                                      data_present_mask;
++	u8                                      stall_mask;
++	u8                                      interrupt_mask;
++	u8                                      clear_mask;
++	u8                                      packet_enable_mask;
++	unsigned                                interrupt_reg;
++	unsigned                                fifo_reg;
++};
++
++struct superh_request {
++	struct usb_request			req;
++	struct list_head			queue;
++};
++
++enum ep0_state { 
++	EP0_IDLE,
++	EP0_IN_DATA_PHASE,
++	EP0_OUT_DATA_PHASE,
++	EP0_END_XFER,
++	EP0_STALL,
++};
++
++#define EP0_FIFO_SIZE	((unsigned)8)
++#define BULK_FIFO_SIZE	((unsigned)64)
++#define ISO_FIFO_SIZE	((unsigned)0)
++#define INT_FIFO_SIZE	((unsigned)8)
++
++struct udc_stats {
++	struct ep0stats {
++		unsigned long		ops;
++		unsigned long		bytes;
++	} read, write;
++	unsigned long			irqs;
++	unsigned long                   irq0s;
++	unsigned long                   irq1s;
++};
++
++struct superh_udc {
++	struct usb_gadget			gadget;
++	struct usb_gadget_driver		*driver;
++	atomic_t		                in_interrupt;
++
++	enum ep0_state				ep0state;
++	struct udc_stats			stats;
++	unsigned int                            vbusmn;
++	unsigned long                           vbusf_time;
++	unsigned				got_irq0 : 1,
++  	                                        got_irq1 : 1,
++						fake_config: 1;
++	int                                     setup_countdown;
++	unsigned long                           reset_time;
++	struct timer_list			timer;
++	struct superh_ep			ep [4];
++};
++
++/* 2.5 changes ... */
++
++#ifndef container_of
++#define container_of    list_entry
++#endif
++
++#ifndef WARN_ON
++#define WARN_ON BUG_ON
++#endif
++
++/* one I/O pin should be used to detect disconnect */
++#define is_usb_connected        ((ctrl_inb(USBIFR1) & VBUSF) != 0)
++
++/* Register addresses - should really be in include/asm-sh */
++
++#ifdef CONFIG_CPU_SUBTYPE_SH7705
++
++#define USBEPDR0I     0xA4480000
++#define USBEPDR0O     0xA4480004
++#define USBEPDR0S     0xA4480008
++#define USBEPDR1      0xA448000C
++#define USBEPDR2      0xA4480010
++#define USBEPDR3      0xA4480014
++#define USBIFR0       0xA4480018
++#define USBIFR1       0xA448001C
++#define USBTRG        0xA4480020
++#define USBFCLR       0xA4480024
++#define USBEPSZ0O     0xA4480028
++#define USBDASTS      0xA448002C
++#define USBEPSTL      0xA4480030
++#define USBIER0       0xA4480034
++#define USBIER1       0xA4480038
++#define USBEPSZ1      0xA448003C
++#define USBDMA        0xA4480040
++#define USBISR0       0xA4480044
++#define USBISR1       0xA4480048
++
++#define USBXVERCR     0xA4480060
++
++#define STBCR3        0xA40A0000
++#define UCLKCR        0xA40A0008
++
++#define PMCR          0xA4000118
++#define PNCR          0xA400011A
++#define PNCR2         0xA405015A
++
++#define PMDR          0xA4000138
++
++#endif
++
++/*
++ * Standby Control Register (STBCR3) c.f. 9.2.3
++ */
++
++#define MSTP14          0x10
++
++/* 
++ * EXCPG Control Register (EXCPGCR) c.f. Section 11.3.1
++ */
++
++#define USBDIVS_EL0	0x00
++#define USBDIVS_EL1	0x01
++#define USBDIVS_EL2	0x02
++
++#define	USBCKS_EL1	0x04
++#define	USBCKS_EL2	0x10
++#define	USBCKS_EL3	0x20
++
++#define USBDIV_11	0x00
++#define USBDIV_12	0x01
++#define USBDIV_13	0x02
++
++#define	USBCKS_PC	0x00
++#define	USBCKS_IC	0x20
++#define	USBCKS_BC	0x24
++#define	USBCKS_EC	0x30
++
++
++/*
++ * Extra Pin Function Controller (EXPFC) c.f. Section 22.2.1
++ */
++
++#define	USB_TRANS_TRAN	0x00
++#define	USB_TRANS_DIG	0x02
++
++#define	USB_SEL_HOST	0x00
++#define	USB_SEL_FUNC	0x01
++
++
++/*
++ * USBDMA Setting Register (USBDMAR) c.f. Section 23.5.19
++ */
++
++#define EP1_DMAE        0x01
++#define EP2_DMAE        0x02
++
++#if defined(CONFIG_CPU_SUBTYPE_SH7727)
++#define PULLUP_E        0x04
++#endif
++
++#if defined(CONFIG_SH_EDOSK7705)
++#define PULLUP_E        0x01
++#endif
++
++/*
++ * USB Interrupt Flag Register 0 (USBIFR0) c.f. Section 23.5.7
++ */
++
++#define BRST            0x80
++#define EP1_FULL        0x40
++#define EP2_TR          0x20
++#define EP2_EMPTY       0x10
++#define SETUP_TS        0x08
++#define EP0o_TS         0x04
++#define EP0i_TR         0x02
++#define EP0i_TS         0x01
++
++
++/*
++ * USB Interrupt Flag Register 1 (USBIFR1) c.f. Section 23.5.8
++ */
++
++#define VBUSMN          0x08
++#define EP3_TR          0x04
++#define EP3_TS          0x02
++#define VBUSF           0x01
++
++/*
++ * USB Trigger Register (USBTRG) c.f. Section 23.5.9
++ */
++
++#define EP0i_PKTE       0x01
++#define EP0o_PKTE       0x02
++#define EP0o_RDFN       0x02
++#define EP0s_PKTE       0x04
++#define EP0s_RDFN       0x04
++
++#define EP2_PKTE        0x10
++#define EP1_PKTE        0x20
++#define EP1_RDFN        0x20
++#define EP3_PKTE        0x40
++
++
++/*
++ * USBFIFO Clear Register (USBFCLR) c.f. Section 23.5.10
++ */
++
++#define EP3_CLEAR       0x40
++#define EP1_CLEAR       0x20
++#define EP2_CLEAR       0x10
++#define EP0o_CLEAR      0x02
++#define EP0i_CLEAR      0x01
++
++
++/*
++ * USBEPSTL Endpoint Stall Register
++ */
++#define EP3_STL      0x08
++#define EP2_STL      0x04
++#define EP1_STL      0x02
++#define EP0_STL      0x01
++
++/*
++ * USBDASTS Data Status Register
++ */
++#define EP3_DE       0x20
++#define EP2_DE       0x10
++#define EP0i_DE      0x01
++
++/*
++ * Port Control Registers (PNCR) c.f. Section 26.2
++ */
++#define PN_PB0_OF       0x0000
++#define PN_PB0_PO       0x0001
++#define PN_PB0_PI_ON    0x0002
++#define PN_PB0_PI_OFF   0x0003
++#define PN_PB0_MSK     ~0x0003
++
++#define PN_PB1_OF       0x0000
++#define PN_PB1_PO       0x0004
++#define PN_PB1_PI_ON    0x0008
++#define PN_PB1_PI_OFF   0x000c
++#define PN_PB1_MSK     ~0x000c
++
++#define PN_PB2_OF       0x0000
++#define PN_PB2_PO       0x0010
++#define PN_PB2_PI_ON    0x0020
++#define PN_PB2_PI_OFF   0x0030
++#define PN_PB2_MSK     ~0x0030
++
++#define PN_PB3_OF       0x0000
++#define PN_PB3_PO       0x0040
++#define PN_PB3_PI_ON    0x0080
++#define PN_PB3_PI_OFF   0x00c0
++#define PN_PB3_MSK     ~0x00c0
++
++#define PN_PB4_OF       0x0000
++#define PN_PB4_PO       0x0100
++#define PN_PB4_PI_ON    0x0200
++#define PN_PB4_PI_OFF   0x0300
++#define PN_PB4_MSK     ~0x0300
++
++#define PN_PB5_OF       0x0000
++#define PN_PB5_PO       0x0400
++#define PN_PB5_PI_ON    0x0800
++#define PN_PB5_PI_OFF   0x0c00
++#define PN_PB5_MSK     ~0x0c00
++
++#define PN_PB6_OF       0x0000
++#define PN_PB6_PO       0x1000
++#define PN_PB6_PI_ON    0x2000
++#define PN_PB6_PI_OFF   0x3000
++#define PN_PB6_MSK     ~0x3000
++
++#define PN_PB7_OF       0x0000
++#define PN_PB7_PO       0x4000
++#define PN_PB7_PI_ON    0x8000
++#define PN_PB7_PI_OFF   0xc000
++#define PN_PB7_MSK     ~0xc000
++
++/*
++ * Debugging support vanishes in non-debug builds.  DBG_NORMAL should be
++ * mostly silent during normal use/testing, with no timing side-effects.
++ */
++#define DBG_NORMAL	1	/* error paths, device state transitions */
++#define DBG_VERBOSE	2	/* add some success path trace info */
++#define DBG_NOISY	3	/* ... even more: request level */
++#define DBG_VERY_NOISY	4	/* ... even more: packet level */
++
++#ifdef DEBUG
++
++#define DMSG(stuff...) printk(KERN_DEBUG "udc: " stuff)
++
++#if defined(VERY_NOISY)
++#    define UDC_DEBUG DBG_VERY_NOISY
++#elif defined(NOISY)
++#    define UDC_DEBUG DBG_NOISY
++#elif defined(VERBOSE)
++#    define UDC_DEBUG DBG_VERBOSE
++#else
++#    define UDC_DEBUG DBG_NORMAL
++#endif
++
++static void __attribute__ ((__unused__))
++dump_state(struct superh_udc *dev)
++{
++	if (!is_usb_connected)
++		return;
++}
++
++
++#else
++
++#define DMSG(stuff...)		do{}while(0)
++
++#define UDC_DEBUG ((unsigned)0)
++
++#define	dump_state(x)	do{}while(0)
++
++#endif
++
++#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
++
++#define WARN(stuff...) printk(KERN_WARNING "udc: " stuff)
++
++#endif /* __LINUX_USB_GADGET_SUPERH_UDC_H */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/usbstring.c kernel/drivers/usb/gadget/usbstring.c
+--- /tmp/kernel/drivers/usb/gadget/usbstring.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/usbstring.c	2005-04-22 17:53:19.516526166 +0200
+@@ -0,0 +1,136 @@
++/*
++ * Copyright (C) 2003 David Brownell
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License as published
++ * by the Free Software Foundation; either version 2.1 of the License, or
++ * (at your option) any later version.
++ */
++
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/list.h>
++#include <linux/string.h>
++#include <linux/init.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include <asm/byteorder.h>
++#include <asm/unaligned.h>
++
++
++static int utf8_to_utf16le(const char *s, u16 *cp, unsigned len)
++{
++	int	count = 0;
++	u8	c;
++	u16	uchar;
++
++	/* this insists on correct encodings, though not minimal ones.
++	 * BUT it currently rejects legit 4-byte UTF-8 code points,
++	 * which need surrogate pairs.  (Unicode 3.1 can use them.)
++	 */
++	while (len != 0 && (c = (u8) *s++) != 0) {
++		if (unlikely(c & 0x80)) {
++			// 2-byte sequence:
++			// 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
++			if ((c & 0xe0) == 0xc0) {
++				uchar = (c & 0x1f) << 6;
++
++				c = (u8) *s++;
++				if ((c & 0xc0) != 0xc0)
++					goto fail;
++				c &= 0x3f;
++				uchar |= c;
++
++			// 3-byte sequence (most CJKV characters):
++			// zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
++			} else if ((c & 0xf0) == 0xe0) {
++				uchar = (c & 0x0f) << 12;
++
++				c = (u8) *s++;
++				if ((c & 0xc0) != 0xc0)
++					goto fail;
++				c &= 0x3f;
++				uchar |= c << 6;
++
++				c = (u8) *s++;
++				if ((c & 0xc0) != 0xc0)
++					goto fail;
++				c &= 0x3f;
++				uchar |= c;
++
++				/* no bogus surrogates */
++				if (0xd800 <= uchar && uchar <= 0xdfff)
++					goto fail;
++
++			// 4-byte sequence (surrogate pairs, currently rare):
++			// 11101110wwwwzzzzyy + 110111yyyyxxxxxx
++			//     = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
++			// (uuuuu = wwww + 1)
++			// FIXME accept the surrogate code points (only)
++
++			} else
++				goto fail;
++		} else
++			uchar = c;
++		put_unaligned (cpu_to_le16 (uchar), cp++);
++		count++;
++		len--;
++	}
++	return count;
++fail:
++	return -1;
++}
++
++
++/**
++ * usb_gadget_get_string - fill out a string descriptor 
++ * @table: of c strings encoded using UTF-8
++ * @id: string id, from low byte of wValue in get string descriptor
++ * @buf: at least 256 bytes
++ *
++ * Finds the UTF-8 string matching the ID, and converts it into a
++ * string descriptor in utf16-le.
++ * Returns length of descriptor (always even) or negative errno
++ *
++ * If your driver needs stings in multiple languages, you'll probably
++ * "switch (wIndex) { ... }"  in your ep0 string descriptor logic,
++ * using this routine after choosing which set of UTF-8 strings to use.
++ * Note that US-ASCII is a strict subset of UTF-8; any string bytes with
++ * the eighth bit set will be multibyte UTF-8 characters, not ISO-8859/1
++ * characters (which are also widely used in C strings).
++ */
++int
++usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf)
++{
++	struct usb_string	*s;
++	int			len;
++
++	/* descriptor 0 has the language id */
++	if (id == 0) {
++		buf [0] = 4;
++		buf [1] = USB_DT_STRING;
++		buf [2] = (u8) table->language;
++		buf [3] = (u8) (table->language >> 8);
++		return 4;
++	}
++	for (s = table->strings; s && s->s; s++)
++		if (s->id == id)
++			break;
++
++	/* unrecognized: stall. */
++	if (!s || !s->s)
++		return -EINVAL;
++
++	/* string descriptors have length, tag, then UTF16-LE text */
++	len = min ((size_t) 126, strlen (s->s));
++	memset (buf + 2, 0, 2 * len);	/* zero all the bytes */
++	len = utf8_to_utf16le(s->s, (u16 *)&buf[2], len);
++	if (len < 0)
++		return -EINVAL;
++	buf [0] = (len + 1) * 2;
++	buf [1] = USB_DT_STRING;
++	return buf [0];
++}
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/drivers/usb/gadget/zero.c kernel/drivers/usb/gadget/zero.c
+--- /tmp/kernel/drivers/usb/gadget/zero.c	1970-01-01 01:00:00.000000000 +0100
++++ kernel/drivers/usb/gadget/zero.c	2005-04-22 17:53:19.521525352 +0200
+@@ -0,0 +1,1363 @@
++/*
++ * zero.c -- Gadget Zero, for USB development
++ *
++ * Copyright (C) 2003-2004 David Brownell
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ *    notice, this list of conditions, and the following disclaimer,
++ *    without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ *    notice, this list of conditions and the following disclaimer in the
++ *    documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ *    to endorse or promote products derived from this software without
++ *    specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") as published by the Free Software
++ * Foundation, either version 2 of that License or (at your option) any
++ * later version.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++
++/*
++ * Gadget Zero only needs two bulk endpoints, and is an example of how you
++ * can write a hardware-agnostic gadget driver running inside a USB device.
++ *
++ * Hardware details are visible (see CONFIG_USB_ZERO_* below) but don't
++ * affect most of the driver.
++ *
++ * Use it with the Linux host/master side "usbtest" driver to get a basic
++ * functional test of your device-side usb stack, or with "usb-skeleton".
++ *
++ * It supports two similar configurations.  One sinks whatever the usb host
++ * writes, and in return sources zeroes.  The other loops whatever the host
++ * writes back, so the host can read it.  Module options include:
++ *
++ *   buflen=N		default N=4096, buffer size used
++ *   qlen=N		default N=32, how many buffers in the loopback queue
++ *   loopdefault	default false, list loopback config first
++ *
++ * Many drivers will only have one configuration, letting them be much
++ * simpler if they also don't support high speed operation (like this
++ * driver does).
++ */
++
++#define DEBUG 1
++// #define VERBOSE
++
++#include <linux/config.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <linux/ioport.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/smp_lock.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/timer.h>
++#include <linux/list.h>
++#include <linux/interrupt.h>
++#include <linux/uts.h>
++#include <linux/version.h>
++
++#include <asm/byteorder.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/system.h>
++#include <asm/unaligned.h>
++
++#include <linux/usb_ch9.h>
++#include <linux/usb_gadget.h>
++
++#include "gadget_chips.h"
++
++
++/*-------------------------------------------------------------------------*/
++
++#define DRIVER_VERSION		"St Patrick's Day 2004"
++
++static const char shortname [] = "zero";
++static const char longname [] = "Gadget Zero";
++
++static const char source_sink [] = "source and sink data";
++static const char loopback [] = "loop input to output";
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * driver assumes self-powered hardware, and
++ * has no way for users to trigger remote wakeup.
++ *
++ * this version autoconfigures as much as possible,
++ * which is reasonable for most "bulk-only" drivers.
++ */
++static const char *EP_IN_NAME;		/* source */
++static const char *EP_OUT_NAME;		/* sink */
++
++/*-------------------------------------------------------------------------*/
++
++/* big enough to hold our biggest descriptor */
++#define USB_BUFSIZ	256
++
++struct zero_dev {
++	spinlock_t		lock;
++	struct usb_gadget	*gadget;
++	struct usb_request	*req;		/* for control responses */
++
++	/* when configured, we have one of two configs:
++	 * - source data (in to host) and sink it (out from host)
++	 * - or loop it back (out from host back in to host)
++	 */
++	u8			config;
++	struct usb_ep		*in_ep, *out_ep;
++
++	/* autoresume timer */
++	struct timer_list	resume;
++};
++
++#define xprintk(d,level,fmt,args...) \
++	printk(level "%s %s: " fmt , shortname , (d)->gadget->dev.bus_id , \
++		## args)
++
++#ifdef DEBUG
++#define DBG(dev,fmt,args...) \
++	xprintk(dev , KERN_DEBUG , fmt , ## args)
++#else
++#define DBG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* DEBUG */
++
++#ifdef VERBOSE
++#define VDBG	DBG
++#else
++#define VDBG(dev,fmt,args...) \
++	do { } while (0)
++#endif /* VERBOSE */
++
++#define ERROR(dev,fmt,args...) \
++	xprintk(dev , KERN_ERR , fmt , ## args)
++#define WARN(dev,fmt,args...) \
++	xprintk(dev , KERN_WARNING , fmt , ## args)
++#define INFO(dev,fmt,args...) \
++	xprintk(dev , KERN_INFO , fmt , ## args)
++
++/*-------------------------------------------------------------------------*/
++
++static unsigned buflen = 4096;
++static unsigned qlen = 32;
++static unsigned pattern = 0;
++
++/*
++ * Normally the "loopback" configuration is second (index 1) so
++ * it's not the default.  Here's where to change that order, to
++ * work better with hosts where config changes are problematic.
++ * Or controllers (like superh) that only support one config.
++ */
++static int loopdefault = 0;
++
++
++MODULE_PARM (buflen, "i");
++MODULE_PARM_DESC (buflen, "size of i/o buffers");
++
++MODULE_PARM (qlen, "i");
++MODULE_PARM_DESC (qlen, "depth of loopback buffering");
++
++MODULE_PARM (pattern, "i");
++MODULE_PARM_DESC (pattern, "0 for default all-zeroes, 1 for mod63");
++
++MODULE_PARM (loopdefault, "b");
++MODULE_PARM_DESC (loopdefault, "true to have default config be loopback");
++
++/*
++ * if it's nonzero, autoresume says how many seconds to wait
++ * before trying to wake up the host after suspend.
++ */
++static unsigned autoresume = 0;
++MODULE_PARM (autoresume, "i");
++
++/*-------------------------------------------------------------------------*/
++
++/* Thanks to NetChip Technologies for donating this product ID.
++ *
++ * DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
++ * Instead:  allocate your own, using normal USB-IF procedures.
++ */
++#ifndef	CONFIG_USB_ZERO_HNPTEST
++#define DRIVER_VENDOR_NUM	0x0525		/* NetChip */
++#define DRIVER_PRODUCT_NUM	0xa4a0		/* Linux-USB "Gadget Zero" */
++#else
++#define DRIVER_VENDOR_NUM	0x1a0a		/* OTG test device IDs */
++#define DRIVER_PRODUCT_NUM	0xbadd
++#endif
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * DESCRIPTORS ... most are static, but strings and (full)
++ * configuration descriptors are built on demand.
++ */
++
++#define STRING_MANUFACTURER		25
++#define STRING_PRODUCT			42
++#define STRING_SERIAL			101
++#define STRING_SOURCE_SINK		250
++#define STRING_LOOPBACK			251
++
++/*
++ * This device advertises two configurations; these numbers work
++ * on a pxa250 as well as more flexible hardware.
++ */
++#define	CONFIG_SOURCE_SINK	3
++#define	CONFIG_LOOPBACK		2
++
++static struct usb_device_descriptor
++device_desc = {
++	.bLength =		sizeof device_desc,
++	.bDescriptorType =	USB_DT_DEVICE,
++
++	.bcdUSB =		__constant_cpu_to_le16 (0x0200),
++	.bDeviceClass =		USB_CLASS_VENDOR_SPEC,
++
++	.idVendor =		__constant_cpu_to_le16 (DRIVER_VENDOR_NUM),
++	.idProduct =		__constant_cpu_to_le16 (DRIVER_PRODUCT_NUM),
++	.iManufacturer =	STRING_MANUFACTURER,
++	.iProduct =		STRING_PRODUCT,
++	.iSerialNumber =	STRING_SERIAL,
++	.bNumConfigurations =	2,
++};
++
++static struct usb_config_descriptor
++source_sink_config = {
++	.bLength =		sizeof source_sink_config,
++	.bDescriptorType =	USB_DT_CONFIG,
++
++	/* compute wTotalLength on the fly */
++	.bNumInterfaces =	1,
++	.bConfigurationValue =	CONFIG_SOURCE_SINK,
++	.iConfiguration =	STRING_SOURCE_SINK,
++	.bmAttributes =		USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
++	.bMaxPower =		1,	/* self-powered */
++};
++
++static struct usb_config_descriptor
++loopback_config = {
++	.bLength =		sizeof loopback_config,
++	.bDescriptorType =	USB_DT_CONFIG,
++
++	/* compute wTotalLength on the fly */
++	.bNumInterfaces =	1,
++	.bConfigurationValue =	CONFIG_LOOPBACK,
++	.iConfiguration =	STRING_LOOPBACK,
++	.bmAttributes =		USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
++	.bMaxPower =		1,	/* self-powered */
++};
++
++static struct usb_otg_descriptor
++otg_descriptor = {
++	.bLength =		sizeof otg_descriptor,
++	.bDescriptorType =	USB_DT_OTG,
++
++	.bmAttributes =		USB_OTG_SRP,
++};
++
++/* one interface in each configuration */
++
++static const struct usb_interface_descriptor
++source_sink_intf = {
++	.bLength =		sizeof source_sink_intf,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bNumEndpoints =	2,
++	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
++	.iInterface =		STRING_SOURCE_SINK,
++};
++
++static const struct usb_interface_descriptor
++loopback_intf = {
++	.bLength =		sizeof loopback_intf,
++	.bDescriptorType =	USB_DT_INTERFACE,
++
++	.bNumEndpoints =	2,
++	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
++	.iInterface =		STRING_LOOPBACK,
++};
++
++/* two full speed bulk endpoints; their use is config-dependent */
++
++static struct usb_endpoint_descriptor
++fs_source_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_IN,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++};
++
++static struct usb_endpoint_descriptor
++fs_sink_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bEndpointAddress =	USB_DIR_OUT,
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++};
++
++static const struct usb_descriptor_header *fs_source_sink_function [] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++	(struct usb_descriptor_header *) &source_sink_intf,
++	(struct usb_descriptor_header *) &fs_sink_desc,
++	(struct usb_descriptor_header *) &fs_source_desc,
++	NULL,
++};
++
++static const struct usb_descriptor_header *fs_loopback_function [] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++	(struct usb_descriptor_header *) &loopback_intf,
++	(struct usb_descriptor_header *) &fs_sink_desc,
++	(struct usb_descriptor_header *) &fs_source_desc,
++	NULL,
++};
++
++#ifdef	CONFIG_USB_GADGET_DUALSPEED
++
++/*
++ * usb 2.0 devices need to expose both high speed and full speed
++ * descriptors, unless they only run at full speed.
++ *
++ * that means alternate endpoint descriptors (bigger packets)
++ * and a "device qualifier" ... plus more construction options
++ * for the config descriptor.
++ */
++
++static struct usb_endpoint_descriptor
++hs_source_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16 (512),
++};
++
++static struct usb_endpoint_descriptor
++hs_sink_desc = {
++	.bLength =		USB_DT_ENDPOINT_SIZE,
++	.bDescriptorType =	USB_DT_ENDPOINT,
++
++	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
++	.wMaxPacketSize =	__constant_cpu_to_le16 (512),
++};
++
++static struct usb_qualifier_descriptor
++dev_qualifier = {
++	.bLength =		sizeof dev_qualifier,
++	.bDescriptorType =	USB_DT_DEVICE_QUALIFIER,
++
++	.bcdUSB =		__constant_cpu_to_le16 (0x0200),
++	.bDeviceClass =		USB_CLASS_VENDOR_SPEC,
++
++	.bNumConfigurations =	2,
++};
++
++static const struct usb_descriptor_header *hs_source_sink_function [] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++	(struct usb_descriptor_header *) &source_sink_intf,
++	(struct usb_descriptor_header *) &hs_source_desc,
++	(struct usb_descriptor_header *) &hs_sink_desc,
++	NULL,
++};
++
++static const struct usb_descriptor_header *hs_loopback_function [] = {
++	(struct usb_descriptor_header *) &otg_descriptor,
++	(struct usb_descriptor_header *) &loopback_intf,
++	(struct usb_descriptor_header *) &hs_source_desc,
++	(struct usb_descriptor_header *) &hs_sink_desc,
++	NULL,
++};
++
++/* maxpacket and other transfer characteristics vary by speed. */
++#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
++
++#else
++
++/* if there's no high speed support, maxpacket doesn't change. */
++#define ep_desc(g,hs,fs) fs
++
++#endif	/* !CONFIG_USB_GADGET_DUALSPEED */
++
++static char				manufacturer [50];
++static char				serial [40];
++
++/* static strings, in UTF-8 */
++static struct usb_string		strings [] = {
++	{ STRING_MANUFACTURER, manufacturer, },
++	{ STRING_PRODUCT, longname, },
++	{ STRING_SERIAL, serial, },
++	{ STRING_LOOPBACK, loopback, },
++	{ STRING_SOURCE_SINK, source_sink, },
++	{  }			/* end of list */
++};
++
++static struct usb_gadget_strings	stringtab = {
++	.language	= 0x0409,	/* en-us */
++	.strings	= strings,
++};
++
++/*
++ * config descriptors are also handcrafted.  these must agree with code
++ * that sets configurations, and with code managing interfaces and their
++ * altsettings.  other complexity may come from:
++ *
++ *  - high speed support, including "other speed config" rules
++ *  - multiple configurations
++ *  - interfaces with alternate settings
++ *  - embedded class or vendor-specific descriptors
++ *
++ * this handles high speed, and has a second config that could as easily
++ * have been an alternate interface setting (on most hardware).
++ *
++ * NOTE:  to demonstrate (and test) more USB capabilities, this driver
++ * should include an altsetting to test interrupt transfers, including
++ * high bandwidth modes at high speed.  (Maybe work like Intel's test
++ * device?)
++ */
++static int
++config_buf (struct usb_gadget *gadget,
++		u8 *buf, u8 type, unsigned index)
++{
++	int				is_source_sink;
++	int				len;
++	const struct usb_descriptor_header **function;
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	int				hs = (gadget->speed == USB_SPEED_HIGH);
++#endif
++
++	/* two configurations will always be index 0 and index 1 */
++	if (index > 1)
++		return -EINVAL;
++	is_source_sink = loopdefault ? (index == 1) : (index == 0);
++
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	if (type == USB_DT_OTHER_SPEED_CONFIG)
++		hs = !hs;
++	if (hs)
++		function = is_source_sink
++			? hs_source_sink_function
++			: hs_loopback_function;
++	else
++#endif
++		function = is_source_sink
++			? fs_source_sink_function
++			: fs_loopback_function;
++
++	/* for now, don't advertise srp-only devices */
++	if (!gadget->is_otg)
++		function++;
++
++	len = usb_gadget_config_buf (is_source_sink
++					? &source_sink_config
++					: &loopback_config,
++			buf, USB_BUFSIZ, function);
++	if (len < 0)
++		return len;
++	((struct usb_config_descriptor *) buf)->bDescriptorType = type;
++	return len;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_request *
++alloc_ep_req (struct usb_ep *ep, unsigned length)
++{
++	struct usb_request	*req;
++
++	req = usb_ep_alloc_request (ep, GFP_ATOMIC);
++	if (req) {
++		req->length = length;
++		req->buf = usb_ep_alloc_buffer (ep, length,
++				&req->dma, GFP_ATOMIC);
++		if (!req->buf) {
++			usb_ep_free_request (ep, req);
++			req = NULL;
++		}
++	}
++	return req;
++}
++
++static void free_ep_req (struct usb_ep *ep, struct usb_request *req)
++{
++	if (req->buf)
++		usb_ep_free_buffer (ep, req->buf, req->dma, req->length);
++	usb_ep_free_request (ep, req);
++}
++
++/*-------------------------------------------------------------------------*/
++
++/* optionally require specific source/sink data patterns  */
++
++static int
++check_read_data (
++	struct zero_dev		*dev,
++	struct usb_ep		*ep,
++	struct usb_request	*req
++)
++{
++	unsigned	i;
++	u8		*buf = req->buf;
++
++	for (i = 0; i < req->actual; i++, buf++) {
++		switch (pattern) {
++		/* all-zeroes has no synchronization issues */
++		case 0:
++			if (*buf == 0)
++				continue;
++			break;
++		/* mod63 stays in sync with short-terminated transfers,
++		 * or otherwise when host and gadget agree on how large
++		 * each usb transfer request should be.  resync is done
++		 * with set_interface or set_config.
++		 */
++		case 1:
++			if (*buf == (u8)(i % 63))
++				continue;
++			break;
++		}
++		ERROR (dev, "bad OUT byte, buf [%d] = %d\n", i, *buf);
++		usb_ep_set_halt (ep);
++		return -EINVAL;
++	}
++	return 0;
++}
++
++static void
++reinit_write_data (
++	struct zero_dev		*dev,
++	struct usb_ep		*ep,
++	struct usb_request	*req
++)
++{
++	unsigned	i;
++	u8		*buf = req->buf;
++
++	switch (pattern) {
++	case 0:
++		memset (req->buf, 0, req->length);
++		break;
++	case 1:
++		for  (i = 0; i < req->length; i++)
++			*buf++ = (u8) (i % 63);
++		break;
++	}
++}
++
++/* if there is only one request in the queue, there'll always be an
++ * irq delay between end of one request and start of the next.
++ * that prevents using hardware dma queues.
++ */
++static void source_sink_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct zero_dev	*dev = ep->driver_data;
++	int		status = req->status;
++
++	switch (status) {
++
++	case 0: 			/* normal completion? */
++		if (ep == dev->out_ep)
++			check_read_data (dev, ep, req);
++		else
++			reinit_write_data (dev, ep, req);
++		break;
++
++	/* this endpoint is normally active while we're configured */
++	case -ECONNABORTED: 		/* hardware forced ep reset */
++	case -ECONNRESET:		/* request dequeued */
++	case -ESHUTDOWN:		/* disconnect from host */
++		VDBG (dev, "%s gone (%d), %d/%d\n", ep->name, status,
++				req->actual, req->length);
++		if (ep == dev->out_ep)
++			check_read_data (dev, ep, req);
++		free_ep_req (ep, req);
++		return;
++
++	case -EOVERFLOW:		/* buffer overrun on read means that
++					 * we didn't provide a big enough
++					 * buffer.
++					 */
++	default:
++#if 1
++		DBG (dev, "%s complete --> %d, %d/%d\n", ep->name,
++				status, req->actual, req->length);
++#endif
++	case -EREMOTEIO:		/* short read */
++		break;
++	}
++
++	status = usb_ep_queue (ep, req, GFP_ATOMIC);
++	if (status) {
++		ERROR (dev, "kill %s:  resubmit %d bytes --> %d\n",
++				ep->name, req->length, status);
++		usb_ep_set_halt (ep);
++		/* FIXME recover later ... somehow */
++	}
++}
++
++static struct usb_request *
++source_sink_start_ep (struct usb_ep *ep, int gfp_flags)
++{
++	struct usb_request	*req;
++	int			status;
++
++	req = alloc_ep_req (ep, buflen);
++	if (!req)
++		return NULL;
++
++	memset (req->buf, 0, req->length);
++	req->complete = source_sink_complete;
++
++	if (strcmp (ep->name, EP_IN_NAME) == 0)
++		reinit_write_data (ep->driver_data, ep, req);
++
++	status = usb_ep_queue (ep, req, gfp_flags);
++	if (status) {
++		struct zero_dev	*dev = ep->driver_data;
++
++		ERROR (dev, "start %s --> %d\n", ep->name, status);
++		free_ep_req (ep, req);
++		req = NULL;
++	}
++
++	return req;
++}
++
++static int
++set_source_sink_config (struct zero_dev *dev, int gfp_flags)
++{
++	int			result = 0;
++	struct usb_ep		*ep;
++	struct usb_gadget	*gadget = dev->gadget;
++
++	gadget_for_each_ep (ep, gadget) {
++		const struct usb_endpoint_descriptor	*d;
++
++		/* one endpoint writes (sources) zeroes in (to the host) */
++		if (strcmp (ep->name, EP_IN_NAME) == 0) {
++			d = ep_desc (gadget, &hs_source_desc, &fs_source_desc);
++			result = usb_ep_enable (ep, d);
++			if (result == 0) {
++				ep->driver_data = dev;
++				if (source_sink_start_ep (ep, gfp_flags) != 0) {
++					dev->in_ep = ep;
++					continue;
++				}
++				usb_ep_disable (ep);
++				result = -EIO;
++			}
++
++		/* one endpoint reads (sinks) anything out (from the host) */
++		} else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
++			d = ep_desc (gadget, &hs_sink_desc, &fs_sink_desc);
++			result = usb_ep_enable (ep, d);
++			if (result == 0) {
++				ep->driver_data = dev;
++				if (source_sink_start_ep (ep, gfp_flags) != 0) {
++					dev->out_ep = ep;
++					continue;
++				}
++				usb_ep_disable (ep);
++				result = -EIO;
++			}
++
++		/* ignore any other endpoints */
++		} else
++			continue;
++
++		/* stop on error */
++		ERROR (dev, "can't start %s, result %d\n", ep->name, result);
++		break;
++	}
++	if (result == 0)
++		DBG (dev, "buflen %d\n", buflen);
++
++	/* caller is responsible for cleanup on error */
++	return result;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void loopback_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	struct zero_dev	*dev = ep->driver_data;
++	int		status = req->status;
++
++	switch (status) {
++
++	case 0: 			/* normal completion? */
++		if (ep == dev->out_ep) {
++			/* loop this OUT packet back IN to the host */
++			req->zero = (req->actual < req->length);
++			req->length = req->actual;
++			status = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
++			if (status == 0)
++				return;
++
++			/* "should never get here" */
++			ERROR (dev, "can't loop %s to %s: %d\n",
++				ep->name, dev->in_ep->name,
++				status);
++		}
++
++		/* queue the buffer for some later OUT packet */
++		req->length = buflen;
++		status = usb_ep_queue (dev->out_ep, req, GFP_ATOMIC);
++		if (status == 0)
++			return;
++
++		/* "should never get here" */
++		/* FALLTHROUGH */
++
++	default:
++		ERROR (dev, "%s loop complete --> %d, %d/%d\n", ep->name,
++				status, req->actual, req->length);
++		/* FALLTHROUGH */
++
++	/* NOTE:  since this driver doesn't maintain an explicit record
++	 * of requests it submitted (just maintains qlen count), we
++	 * rely on the hardware driver to clean up on disconnect or
++	 * endpoint disable.
++	 */
++	case -ECONNABORTED: 		/* hardware forced ep reset */
++	case -ECONNRESET:		/* request dequeued */
++	case -ESHUTDOWN:		/* disconnect from host */
++		free_ep_req (ep, req);
++		return;
++	}
++}
++
++static int
++set_loopback_config (struct zero_dev *dev, int gfp_flags)
++{
++	int			result = 0;
++	struct usb_ep		*ep;
++	struct usb_gadget	*gadget = dev->gadget;
++
++	gadget_for_each_ep (ep, gadget) {
++		const struct usb_endpoint_descriptor	*d;
++
++		/* one endpoint writes data back IN to the host */
++		if (strcmp (ep->name, EP_IN_NAME) == 0) {
++			d = ep_desc (gadget, &hs_source_desc, &fs_source_desc);
++			result = usb_ep_enable (ep, d);
++			if (result == 0) {
++				ep->driver_data = dev;
++				dev->in_ep = ep;
++				continue;
++			}
++
++		/* one endpoint just reads OUT packets */
++		} else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
++			d = ep_desc (gadget, &hs_sink_desc, &fs_sink_desc);
++			result = usb_ep_enable (ep, d);
++			if (result == 0) {
++				ep->driver_data = dev;
++				dev->out_ep = ep;
++				continue;
++			}
++
++		/* ignore any other endpoints */
++		} else
++			continue;
++
++		/* stop on error */
++		ERROR (dev, "can't enable %s, result %d\n", ep->name, result);
++		break;
++	}
++
++	/* allocate a bunch of read buffers and queue them all at once.
++	 * we buffer at most 'qlen' transfers; fewer if any need more
++	 * than 'buflen' bytes each.
++	 */
++	if (result == 0) {
++		struct usb_request	*req;
++		unsigned		i;
++
++		ep = dev->out_ep;
++		for (i = 0; i < qlen && result == 0; i++) {
++			req = alloc_ep_req (ep, buflen);
++			if (req) {
++				req->complete = loopback_complete;
++				result = usb_ep_queue (ep, req, GFP_ATOMIC);
++				if (result)
++					DBG (dev, "%s queue req --> %d\n",
++							ep->name, result);
++			} else
++				result = -ENOMEM;
++		}
++	}
++	if (result == 0)
++		DBG (dev, "qlen %d, buflen %d\n", qlen, buflen);
++
++	/* caller is responsible for cleanup on error */
++	return result;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void zero_reset_config (struct zero_dev *dev)
++{
++	if (dev->config == 0)
++		return;
++
++	DBG (dev, "reset config\n");
++
++	/* just disable endpoints, forcing completion of pending i/o.
++	 * all our completion handlers free their requests in this case.
++	 */
++	if (dev->in_ep) {
++		usb_ep_disable (dev->in_ep);
++		dev->in_ep = NULL;
++	}
++	if (dev->out_ep) {
++		usb_ep_disable (dev->out_ep);
++		dev->out_ep = NULL;
++	}
++	dev->config = 0;
++	del_timer (&dev->resume);
++}
++
++/* change our operational config.  this code must agree with the code
++ * that returns config descriptors, and altsetting code.
++ *
++ * it's also responsible for power management interactions. some
++ * configurations might not work with our current power sources.
++ *
++ * note that some device controller hardware will constrain what this
++ * code can do, perhaps by disallowing more than one configuration or
++ * by limiting configuration choices (like the pxa2xx).
++ */
++static int
++zero_set_config (struct zero_dev *dev, unsigned number, int gfp_flags)
++{
++	int			result = 0;
++	struct usb_gadget	*gadget = dev->gadget;
++
++	if (number == dev->config)
++		return 0;
++
++	if (gadget_is_sa1100 (gadget) && dev->config) {
++		/* tx fifo is full, but we can't clear it...*/
++		INFO (dev, "can't change configurations\n");
++		return -ESPIPE;
++	}
++	zero_reset_config (dev);
++
++	switch (number) {
++	case CONFIG_SOURCE_SINK:
++		result = set_source_sink_config (dev, gfp_flags);
++		break;
++	case CONFIG_LOOPBACK:
++		result = set_loopback_config (dev, gfp_flags);
++		break;
++	default:
++		result = -EINVAL;
++		/* FALL THROUGH */
++	case 0:
++		return result;
++	}
++
++	if (!result && (!dev->in_ep || !dev->out_ep))
++		result = -ENODEV;
++	if (result)
++		zero_reset_config (dev);
++	else {
++		char *speed;
++
++		switch (gadget->speed) {
++		case USB_SPEED_LOW:	speed = "low"; break;
++		case USB_SPEED_FULL:	speed = "full"; break;
++		case USB_SPEED_HIGH:	speed = "high"; break;
++		default: 		speed = "?"; break;
++		}
++
++		dev->config = number;
++		INFO (dev, "%s speed config #%d: %s\n", speed, number,
++				(number == CONFIG_SOURCE_SINK)
++					? source_sink : loopback);
++	}
++	return result;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void zero_setup_complete (struct usb_ep *ep, struct usb_request *req)
++{
++	if (req->status || req->actual != req->length)
++		DBG ((struct zero_dev *) ep->driver_data,
++				"setup complete --> %d, %d/%d\n",
++				req->status, req->actual, req->length);
++}
++
++/*
++ * The setup() callback implements all the ep0 functionality that's
++ * not handled lower down, in hardware or the hardware driver (like
++ * device and endpoint feature flags, and their status).  It's all
++ * housekeeping for the gadget function we're implementing.  Most of
++ * the work is in config-specific setup.
++ */
++static int
++zero_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
++{
++	struct zero_dev		*dev = get_gadget_data (gadget);
++	struct usb_request	*req = dev->req;
++	int			value = -EOPNOTSUPP;
++
++	/* usually this stores reply data in the pre-allocated ep0 buffer,
++	 * but config change events will reconfigure hardware.
++	 */
++	req->zero = 0;
++	switch (ctrl->bRequest) {
++
++	case USB_REQ_GET_DESCRIPTOR:
++		if (ctrl->bRequestType != USB_DIR_IN)
++			goto unknown;
++		switch (ctrl->wValue >> 8) {
++
++		case USB_DT_DEVICE:
++			value = min (ctrl->wLength, (u16) sizeof device_desc);
++			memcpy (req->buf, &device_desc, value);
++			break;
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++		case USB_DT_DEVICE_QUALIFIER:
++			if (!gadget->is_dualspeed)
++				break;
++			value = min (ctrl->wLength, (u16) sizeof dev_qualifier);
++			memcpy (req->buf, &dev_qualifier, value);
++			break;
++
++		case USB_DT_OTHER_SPEED_CONFIG:
++			if (!gadget->is_dualspeed)
++				break;
++			// FALLTHROUGH
++#endif /* CONFIG_USB_GADGET_DUALSPEED */
++		case USB_DT_CONFIG:
++			value = config_buf (gadget, req->buf,
++					ctrl->wValue >> 8,
++					ctrl->wValue & 0xff);
++			if (value >= 0)
++				value = min (ctrl->wLength, (u16) value);
++			break;
++
++		case USB_DT_STRING:
++			/* wIndex == language code.
++			 * this driver only handles one language, you can
++			 * add string tables for other languages, using
++			 * any UTF-8 characters
++			 */
++			value = usb_gadget_get_string (&stringtab,
++					ctrl->wValue & 0xff, req->buf);
++			if (value >= 0)
++				value = min (ctrl->wLength, (u16) value);
++			break;
++		}
++		break;
++
++	/* currently two configs, two speeds */
++	case USB_REQ_SET_CONFIGURATION:
++		if (ctrl->bRequestType != 0)
++			goto unknown;
++		if (gadget->a_hnp_support)
++			DBG (dev, "HNP available\n");
++		else if (gadget->a_alt_hnp_support)
++			DBG (dev, "HNP needs a different root port\n");
++		else
++			VDBG (dev, "HNP inactive\n");
++		spin_lock (&dev->lock);
++		value = zero_set_config (dev, ctrl->wValue, GFP_ATOMIC);
++		spin_unlock (&dev->lock);
++		break;
++	case USB_REQ_GET_CONFIGURATION:
++		if (ctrl->bRequestType != USB_DIR_IN)
++			goto unknown;
++		*(u8 *)req->buf = dev->config;
++		value = min (ctrl->wLength, (u16) 1);
++		break;
++
++	/* until we add altsetting support, or other interfaces,
++	 * only 0/0 are possible.  pxa2xx only supports 0/0 (poorly)
++	 * and already killed pending endpoint I/O.
++	 */
++	case USB_REQ_SET_INTERFACE:
++		if (ctrl->bRequestType != USB_RECIP_INTERFACE)
++			goto unknown;
++		spin_lock (&dev->lock);
++		if (dev->config && ctrl->wIndex == 0 && ctrl->wValue == 0) {
++			u8		config = dev->config;
++
++			/* resets interface configuration, forgets about
++			 * previous transaction state (queued bufs, etc)
++			 * and re-inits endpoint state (toggle etc)
++			 * no response queued, just zero status == success.
++			 * if we had more than one interface we couldn't
++			 * use this "reset the config" shortcut.
++			 */
++			zero_reset_config (dev);
++			zero_set_config (dev, config, GFP_ATOMIC);
++			value = 0;
++		}
++		spin_unlock (&dev->lock);
++		break;
++	case USB_REQ_GET_INTERFACE:
++		if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE))
++			goto unknown;
++		if (!dev->config)
++			break;
++		if (ctrl->wIndex != 0) {
++			value = -EDOM;
++			break;
++		}
++		*(u8 *)req->buf = 0;
++		value = min (ctrl->wLength, (u16) 1);
++		break;
++
++	/*
++	 * These are the same vendor-specific requests supported by
++	 * Intel's USB 2.0 compliance test devices.  We exceed that
++	 * device spec by allowing multiple-packet requests.
++	 */
++	case 0x5b:	/* control WRITE test -- fill the buffer */
++		if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
++			goto unknown;
++		if (ctrl->wValue || ctrl->wIndex)
++			break;
++		/* just read that many bytes into the buffer */
++		if (ctrl->wLength > USB_BUFSIZ)
++			break;
++		value = ctrl->wLength;
++		break;
++	case 0x5c:	/* control READ test -- return the buffer */
++		if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
++			goto unknown;
++		if (ctrl->wValue || ctrl->wIndex)
++			break;
++		/* expect those bytes are still in the buffer; send back */
++		if (ctrl->wLength > USB_BUFSIZ
++				|| ctrl->wLength != req->length)
++			break;
++		value = ctrl->wLength;
++		break;
++
++	default:
++unknown:
++		VDBG (dev,
++			"unknown control req%02x.%02x v%04x i%04x l%d\n",
++			ctrl->bRequestType, ctrl->bRequest,
++			ctrl->wValue, ctrl->wIndex, ctrl->wLength);
++	}
++
++	/* respond with data transfer before status phase? */
++	if (value >= 0) {
++		req->length = value;
++		req->zero = value < ctrl->wLength
++				&& (value % gadget->ep0->maxpacket) == 0;
++		value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
++		if (value < 0) {
++			DBG (dev, "ep_queue --> %d\n", value);
++			req->status = 0;
++			zero_setup_complete (gadget->ep0, req);
++		}
++	}
++
++	/* device either stalls (value < 0) or reports success */
++	return value;
++}
++
++static void
++zero_disconnect (struct usb_gadget *gadget)
++{
++	struct zero_dev		*dev = get_gadget_data (gadget);
++	unsigned long		flags;
++
++	spin_lock_irqsave (&dev->lock, flags);
++	zero_reset_config (dev);
++
++	/* a more significant application might have some non-usb
++	 * activities to quiesce here, saving resources like power
++	 * or pushing the notification up a network stack.
++	 */
++	spin_unlock_irqrestore (&dev->lock, flags);
++
++	/* next we may get setup() calls to enumerate new connections;
++	 * or an unbind() during shutdown (including removing module).
++	 */
++}
++
++static void
++zero_autoresume (unsigned long _dev)
++{
++	struct zero_dev	*dev = (struct zero_dev *) _dev;
++	int		status;
++
++	/* normally the host would be woken up for something
++	 * more significant than just a timer firing...
++	 */
++	if (dev->gadget->speed != USB_SPEED_UNKNOWN) {
++		status = usb_gadget_wakeup (dev->gadget);
++		DBG (dev, "wakeup --> %d\n", status);
++	}
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void
++zero_unbind (struct usb_gadget *gadget)
++{
++	struct zero_dev		*dev = get_gadget_data (gadget);
++
++	DBG (dev, "unbind\n");
++
++	/* we've already been disconnected ... no i/o is active */
++	if (dev->req)
++		free_ep_req (gadget->ep0, dev->req);
++	del_timer_sync (&dev->resume);
++	kfree (dev);
++	set_gadget_data (gadget, NULL);
++}
++
++static int
++zero_bind (struct usb_gadget *gadget)
++{
++	struct zero_dev		*dev;
++	struct usb_ep		*ep;
++
++	/* Bulk-only drivers like this one SHOULD be able to
++	 * autoconfigure on any sane usb controller driver,
++	 * but there may also be important quirks to address.
++	 */
++	usb_ep_autoconfig_reset (gadget);
++	ep = usb_ep_autoconfig (gadget, &fs_source_desc);
++	if (!ep) {
++autoconf_fail:
++		printk (KERN_ERR "%s: can't autoconfigure on %s\n",
++			shortname, gadget->name);
++		return -ENODEV;
++	}
++	EP_IN_NAME = ep->name;
++	ep->driver_data = ep;	/* claim */
++	
++	ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
++	if (!ep)
++		goto autoconf_fail;
++	EP_OUT_NAME = ep->name;
++	ep->driver_data = ep;	/* claim */
++
++
++	/*
++	 * DRIVER POLICY CHOICE:  you may want to do this differently.
++	 * One thing to avoid is reusing a bcdDevice revision code
++	 * with different host-visible configurations or behavior
++	 * restrictions -- using ep1in/ep2out vs ep1out/ep3in, etc
++	 */
++	if (gadget_is_net2280 (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201);
++	} else if (gadget_is_pxa (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203);
++#if 0
++	} else if (gadget_is_sh(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204);
++		/* SH has only one configuration; see "loopdefault" */
++		device_desc.bNumConfigurations = 1;
++		/* FIXME make 1 == default.bConfigurationValue */
++#endif
++	} else if (gadget_is_sa1100 (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205);
++	} else if (gadget_is_goku (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206);
++	} else if (gadget_is_mq11xx (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207);
++	} else if (gadget_is_omap (gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208);
++	} else if (gadget_is_lh7a40x(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0209);
++	} else if (gadget_is_n9604(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
++	} else if (gadget_is_pxa27x(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
++	} else if (gadget_is_s3c2410(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
++	} else if (gadget_is_at91(gadget)) {
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
++	} else {
++		/* gadget zero is so simple (for now, no altsettings) that
++		 * it SHOULD NOT have problems with bulk-capable hardware.
++		 * so warn about unrcognized controllers, don't panic.
++		 *
++		 * things like configuration and altsetting numbering
++		 * can need hardware-specific attention though.
++		 */
++		printk (KERN_WARNING "%s: controller '%s' not recognized\n",
++			shortname, gadget->name);
++		device_desc.bcdDevice = __constant_cpu_to_le16 (0x9999);
++	}
++
++
++	/* ok, we made sense of the hardware ... */
++	dev = kmalloc (sizeof *dev, SLAB_KERNEL);
++	if (!dev)
++		return -ENOMEM;
++	memset (dev, 0, sizeof *dev);
++	spin_lock_init (&dev->lock);
++	dev->gadget = gadget;
++	set_gadget_data (gadget, dev);
++
++	/* preallocate control response and buffer */
++	dev->req = usb_ep_alloc_request (gadget->ep0, GFP_KERNEL);
++	if (!dev->req)
++		goto enomem;
++	dev->req->buf = usb_ep_alloc_buffer (gadget->ep0, USB_BUFSIZ,
++				&dev->req->dma, GFP_KERNEL);
++	if (!dev->req->buf)
++		goto enomem;
++
++	dev->req->complete = zero_setup_complete;
++
++	device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
++
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	/* assume ep0 uses the same value for both speeds ... */
++	dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
++
++	/* and that all endpoints are dual-speed */
++	hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
++	hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
++#endif
++
++	if (gadget->is_otg) {
++		otg_descriptor.bmAttributes |= USB_OTG_HNP,
++		source_sink_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++		loopback_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++	}
++
++	if (gadget->is_otg) {
++		otg_descriptor.bmAttributes |= USB_OTG_HNP,
++		source_sink_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++		loopback_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++	}
++
++	usb_gadget_set_selfpowered (gadget);
++
++	init_timer (&dev->resume);
++	dev->resume.function = zero_autoresume;
++	dev->resume.data = (unsigned long) dev;
++	if (autoresume) {
++		source_sink_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++		loopback_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
++	}
++
++	gadget->ep0->driver_data = dev;
++
++	INFO (dev, "%s, version: " DRIVER_VERSION "\n", longname);
++	INFO (dev, "using %s, OUT %s IN %s\n", gadget->name,
++		EP_OUT_NAME, EP_IN_NAME);
++
++	snprintf (manufacturer, sizeof manufacturer,
++		UTS_SYSNAME " " UTS_RELEASE " with %s",
++		gadget->name);
++
++	return 0;
++
++enomem:
++	zero_unbind (gadget);
++	return -ENOMEM;
++}
++
++/*-------------------------------------------------------------------------*/
++
++static void
++zero_suspend (struct usb_gadget *gadget)
++{
++	struct zero_dev		*dev = get_gadget_data (gadget);
++
++	if (gadget->speed == USB_SPEED_UNKNOWN)
++		return;
++
++	if (autoresume) {
++		mod_timer (&dev->resume, jiffies + (HZ * autoresume));
++		DBG (dev, "suspend, wakeup in %d seconds\n", autoresume);
++	} else
++		DBG (dev, "suspend\n");
++}
++
++static void
++zero_resume (struct usb_gadget *gadget)
++{
++	struct zero_dev		*dev = get_gadget_data (gadget);
++
++	DBG (dev, "resume\n");
++	del_timer (&dev->resume);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static struct usb_gadget_driver zero_driver = {
++#ifdef CONFIG_USB_GADGET_DUALSPEED
++	.speed		= USB_SPEED_HIGH,
++#else
++	.speed		= USB_SPEED_FULL,
++#endif
++	.function	= (char *) longname,
++	.bind		= zero_bind,
++	.unbind		= zero_unbind,
++
++	.setup		= zero_setup,
++	.disconnect	= zero_disconnect,
++
++	.suspend	= zero_suspend,
++	.resume		= zero_resume,
++
++	.driver 	= {
++		.name		= (char *) shortname,
++		// .shutdown = ...
++		// .suspend = ...
++		// .resume = ...
++	},
++};
++
++MODULE_AUTHOR ("David Brownell");
++MODULE_LICENSE ("Dual BSD/GPL");
++
++
++static int __init init (void)
++{
++	/* a real value would likely come through some id prom
++	 * or module option.  this one takes at least two packets.
++	 */
++	strncpy (serial, "0123456789.0123456789.0123456789", sizeof serial);
++	serial [sizeof serial - 1] = 0;
++
++	return usb_gadget_register_driver (&zero_driver);
++}
++module_init (init);
++
++static void __exit cleanup (void)
++{
++	usb_gadget_unregister_driver (&zero_driver);
++}
++module_exit (cleanup);
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/include/linux/moduleparam.h kernel/include/linux/moduleparam.h
+--- /tmp/kernel/include/linux/moduleparam.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/include/linux/moduleparam.h	2005-04-22 17:53:19.357552052 +0200
+@@ -0,0 +1,25 @@
++#ifndef _LINUX_MODULE_PARAMS_H
++#define _LINUX_MODULE_PARAMS_H
++/* Macros for (very simple) module parameter compatibility with 2.6. */
++#include <linux/module.h>
++
++/* type is byte, short, ushort, int, uint, long, ulong, bool. (2.6
++   has more, but they are not supported).  perm is permissions when
++   it appears in sysfs: 0 means doens't appear, 0444 means read-only
++   by everyone, 0644 means changable dynamically by root, etc.  name
++   must be in scope (unlike MODULE_PARM).
++*/
++#define module_param(name, type, perm)					     \
++	static inline void *__check_existence_##name(void) { return &name; } \
++	MODULE_PARM(name, _MODULE_PARM_STRING_ ## type)
++
++#define _MODULE_PARM_STRING_byte "b"
++#define _MODULE_PARM_STRING_short "h"
++#define _MODULE_PARM_STRING_ushort "h"
++#define _MODULE_PARM_STRING_int "i"
++#define _MODULE_PARM_STRING_uint "i"
++#define _MODULE_PARM_STRING_long "l"
++#define _MODULE_PARM_STRING_ulong "l"
++#define _MODULE_PARM_STRING_bool "i"
++
++#endif /* _LINUX_MODULE_PARAM_TYPES_H */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/include/linux/usb_cdc.h kernel/include/linux/usb_cdc.h
+--- /tmp/kernel/include/linux/usb_cdc.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/include/linux/usb_cdc.h	2005-04-22 17:53:19.360551563 +0200
+@@ -0,0 +1,204 @@
++/*
++ * USB Communications Device Class (CDC) definitions
++ *
++ * CDC says how to talk to lots of different types of network adapters,
++ * notably ethernet adapters and various modems.  It's used mostly with
++ * firmware based USB peripherals.
++ *
++ * (C) Copyright 2005 by David Brownell
++ * All Rights Reserved.
++ *
++ * This software is licensed under the GNU GPL version 2.
++ */
++
++#define USB_CDC_SUBCLASS_ACM			0x02
++#define USB_CDC_SUBCLASS_ETHERNET		0x06
++#define USB_CDC_SUBCLASS_WHCM			0x08
++#define USB_CDC_SUBCLASS_DMM			0x09
++#define USB_CDC_SUBCLASS_MDLM			0x0a
++#define USB_CDC_SUBCLASS_OBEX			0x0b
++
++#define USB_CDC_PROTO_NONE			0
++
++#define USB_CDC_ACM_PROTO_AT_V25TER		1
++#define USB_CDC_ACM_PROTO_AT_PCCA101		2
++#define USB_CDC_ACM_PROTO_AT_PCCA101_WAKE	3
++#define USB_CDC_ACM_PROTO_AT_GSM		4
++#define USB_CDC_ACM_PROTO_AT_3G			5
++#define USB_CDC_ACM_PROTO_AT_CDMA		6
++#define USB_CDC_ACM_PROTO_VENDOR		0xff
++
++/*-------------------------------------------------------------------------*/
++
++/* 2.6 "sparse" support for checking beyond what GCC does */
++
++#define	__le16	u16
++#define	__le32	u32
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * Class-Specific descriptors ... there are a couple dozen of them
++ */
++
++#define USB_CDC_HEADER_TYPE		0x00		/* header_desc */
++#define USB_CDC_CALL_MANAGEMENT_TYPE	0x01		/* call_mgmt_descriptor */
++#define USB_CDC_ACM_TYPE		0x02		/* acm_descriptor */
++#define USB_CDC_UNION_TYPE		0x06		/* union_desc */
++#define USB_CDC_COUNTRY_TYPE		0x07
++#define USB_CDC_ETHERNET_TYPE		0x0f		/* ether_desc */
++#define USB_CDC_WHCM_TYPE		0x11
++#define USB_CDC_MDLM_TYPE		0x12		/* mdlm_desc */
++#define USB_CDC_MDLM_DETAIL_TYPE	0x13		/* mdlm_detail_desc */
++#define USB_CDC_DMM_TYPE		0x14
++#define USB_CDC_OBEX_TYPE		0x15
++
++/* "Header Functional Descriptor" from CDC spec  5.2.3.1 */
++struct usb_cdc_header_desc {
++	__u8	bLength;
++	__u8	bDescriptorType;
++	__u8	bDescriptorSubType;
++
++	__le16	bcdCDC;
++} __attribute__ ((packed));
++
++/* "Call Management Descriptor" from CDC spec  5.2.3.2 */
++struct usb_cdc_call_mgmt_descriptor {
++	__u8	bLength;
++	__u8	bDescriptorType;
++	__u8	bDescriptorSubType;
++
++	__u8	bmCapabilities;
++#define USB_CDC_CALL_MGMT_CAP_CALL_MGMT		0x01
++#define USB_CDC_CALL_MGMT_CAP_DATA_INTF		0x02
++
++	__u8	bDataInterface;
++} __attribute__ ((packed));
++
++/* "Abstract Control Management Descriptor" from CDC spec  5.2.3.3 */
++struct usb_cdc_acm_descriptor {
++	__u8	bLength;
++	__u8	bDescriptorType;
++	__u8	bDescriptorSubType;
++
++	__u8	bmCapabilities;
++} __attribute__ ((packed));
++
++/* "Union Functional Descriptor" from CDC spec 5.2.3.8 */
++struct usb_cdc_union_desc {
++	__u8	bLength;
++	__u8	bDescriptorType;
++	__u8	bDescriptorSubType;
++
++	__u8	bMasterInterface0;
++	__u8	bSlaveInterface0;
++	/* ... and there could be other slave interfaces */
++} __attribute__ ((packed));
++
++/* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */
++struct usb_cdc_ether_desc {
++	__u8	bLength;
++	__u8	bDescriptorType;
++	__u8	bDescriptorSubType;
++
++	__u8	iMACAddress;
++	__le32	bmEthernetStatistics;
++	__le16	wMaxSegmentSize;
++	__le16	wNumberMCFilters;
++	__u8	bNumberPowerFilters;
++} __attribute__ ((packed));
++
++/* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */
++struct usb_cdc_mdlm_desc {
++	__u8	bLength;
++	__u8	bDescriptorType;
++	__u8	bDescriptorSubType;
++
++	__le16	bcdVersion;
++	__u8	bGUID[16];
++} __attribute__ ((packed));
++
++/* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */
++struct usb_cdc_mdlm_detail_desc {
++	__u8	bLength;
++	__u8	bDescriptorType;
++	__u8	bDescriptorSubType;
++
++	/* type is associated with mdlm_desc.bGUID */
++	__u8	bGuidDescriptorType;
++	__u8	bDetailData[];
++} __attribute__ ((packed));
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * Class-Specific Control Requests (6.2)
++ *
++ * section 3.6.2.1 table 4 has the ACM profile, for modems.
++ * section 3.8.2 table 10 has the ethernet profile.
++ *
++ * Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant,
++ * heavily dependent on the encapsulated (proprietary) command mechanism.
++ */
++
++#define USB_CDC_SEND_ENCAPSULATED_COMMAND	0x00
++#define USB_CDC_GET_ENCAPSULATED_RESPONSE	0x01
++#define USB_CDC_REQ_SET_LINE_CODING		0x20
++#define USB_CDC_REQ_GET_LINE_CODING		0x21
++#define USB_CDC_REQ_SET_CONTROL_LINE_STATE	0x22
++#define USB_CDC_REQ_SEND_BREAK			0x23
++#define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS	0x40
++#define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER	0x41
++#define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER	0x42
++#define USB_CDC_SET_ETHERNET_PACKET_FILTER	0x43
++#define USB_CDC_GET_ETHERNET_STATISTIC		0x44
++
++/* Line Coding Structure from CDC spec 6.2.13 */
++struct usb_cdc_line_coding {
++	__le32	dwDTERate;
++	__u8	bCharFormat;
++#define USB_CDC_1_STOP_BITS			0
++#define USB_CDC_1_5_STOP_BITS			1
++#define USB_CDC_2_STOP_BITS			2
++
++	__u8	bParityType;
++#define USB_CDC_NO_PARITY			0
++#define USB_CDC_ODD_PARITY			1
++#define USB_CDC_EVEN_PARITY			2
++#define USB_CDC_MARK_PARITY			3
++#define USB_CDC_SPACE_PARITY			4
++
++	__u8	bDataBits;
++} __attribute__ ((packed));
++
++/* table 62; bits in multicast filter */
++#define	USB_CDC_PACKET_TYPE_PROMISCUOUS		(1 << 0)
++#define	USB_CDC_PACKET_TYPE_ALL_MULTICAST	(1 << 1) /* no filter */
++#define	USB_CDC_PACKET_TYPE_DIRECTED		(1 << 2)
++#define	USB_CDC_PACKET_TYPE_BROADCAST		(1 << 3)
++#define	USB_CDC_PACKET_TYPE_MULTICAST		(1 << 4) /* filtered */
++
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * Class-Specific Notifications (6.3) sent by interrupt transfers
++ *
++ * section 3.8.2 table 11 of the CDC spec lists Ethernet notifications
++ * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS
++ * RNDIS also defines its own bit-incompatible notifications
++ */
++
++#define USB_CDC_NOTIFY_NETWORK_CONNECTION	0x00
++#define USB_CDC_NOTIFY_RESPONSE_AVAILABLE	0x01
++#define USB_CDC_NOTIFY_SERIAL_STATE		0x20
++#define USB_CDC_NOTIFY_SPEED_CHANGE		0x2a
++
++struct usb_cdc_notification {
++	__u8	bmRequestType;
++	__u8	bNotificationType;
++	__le16	wValue;
++	__le16	wIndex;
++	__le16	wLength;
++} __attribute__ ((packed));
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/include/linux/usb_ch9.h kernel/include/linux/usb_ch9.h
+--- /tmp/kernel/include/linux/usb_ch9.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/include/linux/usb_ch9.h	2005-04-22 17:53:19.363551075 +0200
+@@ -0,0 +1,384 @@
++/*
++ * This file holds USB constants and structures that are needed for USB
++ * device APIs.  These are used by the USB device model, which is defined
++ * in chapter 9 of the USB 2.0 specification.  Linux has several APIs in C
++ * that need these:
++ *
++ * - the master/host side Linux-USB kernel driver API;
++ * - the "usbfs" user space API; and
++ * - (eventually) a Linux "gadget" slave/device side driver API.
++ *
++ * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
++ * act either as a USB master/host or as a USB slave/device.  That means
++ * the master and slave side APIs will benefit from working well together.
++ */
++
++#ifndef __LINUX_USB_CH9_H
++#define __LINUX_USB_CH9_H
++
++#include <asm/types.h>		/* __u8 etc */
++
++/*-------------------------------------------------------------------------*/
++
++/* CONTROL REQUEST SUPPORT */
++
++/*
++ * USB directions
++ *
++ * This bit flag is used in endpoint descriptors' bEndpointAddress field.
++ * It's also one of three fields in control requests bRequestType.
++ */
++#define USB_DIR_OUT			0		/* to device */
++#define USB_DIR_IN			0x80		/* to host */
++
++/*
++ * USB types, the second of three bRequestType fields
++ */
++#define USB_TYPE_MASK			(0x03 << 5)
++#define USB_TYPE_STANDARD		(0x00 << 5)
++#define USB_TYPE_CLASS			(0x01 << 5)
++#define USB_TYPE_VENDOR			(0x02 << 5)
++#define USB_TYPE_RESERVED		(0x03 << 5)
++
++/*
++ * USB recipients, the third of three bRequestType fields
++ */
++#define USB_RECIP_MASK			0x1f
++#define USB_RECIP_DEVICE		0x00
++#define USB_RECIP_INTERFACE		0x01
++#define USB_RECIP_ENDPOINT		0x02
++#define USB_RECIP_OTHER			0x03
++
++/*
++ * Standard requests, for the bRequest field of a SETUP packet.
++ *
++ * These are qualified by the bRequestType field, so that for example
++ * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
++ * by a GET_STATUS request.
++ */
++#define USB_REQ_GET_STATUS		0x00
++#define USB_REQ_CLEAR_FEATURE		0x01
++#define USB_REQ_SET_FEATURE		0x03
++#define USB_REQ_SET_ADDRESS		0x05
++#define USB_REQ_GET_DESCRIPTOR		0x06
++#define USB_REQ_SET_DESCRIPTOR		0x07
++#define USB_REQ_GET_CONFIGURATION	0x08
++#define USB_REQ_SET_CONFIGURATION	0x09
++#define USB_REQ_GET_INTERFACE		0x0A
++#define USB_REQ_SET_INTERFACE		0x0B
++#define USB_REQ_SYNCH_FRAME		0x0C
++
++/*
++ * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
++ * are read as a bit array returned by USB_REQ_GET_STATUS.  (So there
++ * are at most sixteen features of each type.)
++ */
++#define USB_DEVICE_SELF_POWERED		0	/* (read only) */
++#define USB_DEVICE_REMOTE_WAKEUP	1	/* dev may initiate wakeup */
++#define USB_DEVICE_TEST_MODE		2	/* (high speed only) */
++#define USB_DEVICE_B_HNP_ENABLE		3	/* dev may initiate HNP */
++#define USB_DEVICE_A_HNP_SUPPORT	4	/* RH port supports HNP */
++#define USB_DEVICE_A_ALT_HNP_SUPPORT	5	/* other RH port does */
++#define USB_DEVICE_DEBUG_MODE		6	/* (special devices only) */
++
++#define USB_ENDPOINT_HALT		0	/* IN/OUT will STALL */
++
++
++/**
++ * struct usb_ctrlrequest - SETUP data for a USB device control request
++ * @bRequestType: matches the USB bmRequestType field
++ * @bRequest: matches the USB bRequest field
++ * @wValue: matches the USB wValue field (le16 byte order)
++ * @wIndex: matches the USB wIndex field (le16 byte order)
++ * @wLength: matches the USB wLength field (le16 byte order)
++ *
++ * This structure is used to send control requests to a USB device.  It matches
++ * the different fields of the USB 2.0 Spec section 9.3, table 9-2.  See the
++ * USB spec for a fuller description of the different fields, and what they are
++ * used for.
++ *
++ * Note that the driver for any interface can issue control requests.
++ * For most devices, interfaces don't coordinate with each other, so
++ * such requests may be made at any time.
++ */
++struct usb_ctrlrequest {
++	__u8 bRequestType;
++	__u8 bRequest;
++	__u16 wValue;
++	__u16 wIndex;
++	__u16 wLength;
++} __attribute__ ((packed));
++
++/*-------------------------------------------------------------------------*/
++
++/*
++ * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
++ * (rarely) accepted by SET_DESCRIPTOR.
++ *
++ * Note that all multi-byte values here are encoded in little endian
++ * byte order "on the wire".  But when exposed through Linux-USB APIs,
++ * they've been converted to cpu byte order.
++ */
++
++/*
++ * Descriptor types ... USB 2.0 spec table 9.5
++ */
++#define USB_DT_DEVICE			0x01
++#define USB_DT_CONFIG			0x02
++#define USB_DT_STRING			0x03
++#define USB_DT_INTERFACE		0x04
++#define USB_DT_ENDPOINT			0x05
++#define USB_DT_DEVICE_QUALIFIER		0x06
++#define USB_DT_OTHER_SPEED_CONFIG	0x07
++#define USB_DT_INTERFACE_POWER		0x08
++/* these are from a minor usb 2.0 revision (ECN) */
++#define USB_DT_OTG			0x09
++#define USB_DT_DEBUG			0x0a
++#define USB_DT_INTERFACE_ASSOCIATION	0x0b
++
++/* conventional codes for class-specific descriptors */
++#define USB_DT_CS_DEVICE		0x21
++#define USB_DT_CS_CONFIG		0x22
++#define USB_DT_CS_STRING		0x23
++#define USB_DT_CS_INTERFACE		0x24
++#define USB_DT_CS_ENDPOINT		0x25
++
++/* All standard descriptors have these 2 fields at the beginning */
++struct usb_descriptor_header {
++	__u8  bLength;
++	__u8  bDescriptorType;
++} __attribute__ ((packed));
++
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_DEVICE: Device descriptor */
++struct usb_device_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u16 bcdUSB;
++	__u8  bDeviceClass;
++	__u8  bDeviceSubClass;
++	__u8  bDeviceProtocol;
++	__u8  bMaxPacketSize0;
++	__u16 idVendor;
++	__u16 idProduct;
++	__u16 bcdDevice;
++	__u8  iManufacturer;
++	__u8  iProduct;
++	__u8  iSerialNumber;
++	__u8  bNumConfigurations;
++} __attribute__ ((packed));
++
++#define USB_DT_DEVICE_SIZE		18
++
++
++/*
++ * Device and/or Interface Class codes
++ * as found in bDeviceClass or bInterfaceClass
++ * and defined by www.usb.org documents
++ */
++#define USB_CLASS_PER_INTERFACE		0	/* for DeviceClass */
++#define USB_CLASS_AUDIO			1
++#define USB_CLASS_COMM			2
++#define USB_CLASS_HID			3
++#define USB_CLASS_PHYSICAL		5
++#define USB_CLASS_STILL_IMAGE		6
++#define USB_CLASS_PRINTER		7
++#define USB_CLASS_MASS_STORAGE		8
++#define USB_CLASS_HUB			9
++#define USB_CLASS_CDC_DATA		0x0a
++#define USB_CLASS_CSCID			0x0b	/* chip+ smart card */
++#define USB_CLASS_CONTENT_SEC		0x0d	/* content security */
++#define USB_CLASS_VIDEO			0x0e
++#define USB_CLASS_APP_SPEC		0xfe
++#define USB_CLASS_VENDOR_SPEC		0xff
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_CONFIG: Configuration descriptor information.
++ *
++ * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
++ * descriptor type is different.  Highspeed-capable devices can look
++ * different depending on what speed they're currently running.  Only
++ * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
++ * descriptors.
++ */
++struct usb_config_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u16 wTotalLength;
++	__u8  bNumInterfaces;
++	__u8  bConfigurationValue;
++	__u8  iConfiguration;
++	__u8  bmAttributes;
++	__u8  bMaxPower;
++} __attribute__ ((packed));
++
++#define USB_DT_CONFIG_SIZE		9
++
++/* from config descriptor bmAttributes */
++#define USB_CONFIG_ATT_ONE		(1 << 7)	/* must be set */
++#define USB_CONFIG_ATT_SELFPOWER	(1 << 6)	/* self powered */
++#define USB_CONFIG_ATT_WAKEUP		(1 << 5)	/* can wakeup */
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_STRING: String descriptor */
++struct usb_string_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u16 wData[1];		/* UTF-16LE encoded */
++} __attribute__ ((packed));
++
++/* note that "string" zero is special, it holds language codes that
++ * the device supports, not Unicode characters.
++ */
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_INTERFACE: Interface descriptor */
++struct usb_interface_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u8  bInterfaceNumber;
++	__u8  bAlternateSetting;
++	__u8  bNumEndpoints;
++	__u8  bInterfaceClass;
++	__u8  bInterfaceSubClass;
++	__u8  bInterfaceProtocol;
++	__u8  iInterface;
++} __attribute__ ((packed));
++
++#define USB_DT_INTERFACE_SIZE		9
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_ENDPOINT: Endpoint descriptor */
++struct usb_endpoint_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u8  bEndpointAddress;
++	__u8  bmAttributes;
++	__u16 wMaxPacketSize;
++	__u8  bInterval;
++
++	// NOTE:  these two are _only_ in audio endpoints.
++	// use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof.
++	__u8  bRefresh;
++	__u8  bSynchAddress;
++} __attribute__ ((packed));
++
++#define USB_DT_ENDPOINT_SIZE		7
++#define USB_DT_ENDPOINT_AUDIO_SIZE	9	/* Audio extension */
++
++
++/*
++ * Endpoints
++ */
++#define USB_ENDPOINT_NUMBER_MASK	0x0f	/* in bEndpointAddress */
++#define USB_ENDPOINT_DIR_MASK		0x80
++
++#define USB_ENDPOINT_XFERTYPE_MASK	0x03	/* in bmAttributes */
++#define USB_ENDPOINT_XFER_CONTROL	0
++#define USB_ENDPOINT_XFER_ISOC		1
++#define USB_ENDPOINT_XFER_BULK		2
++#define USB_ENDPOINT_XFER_INT		3
++
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
++struct usb_qualifier_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u16 bcdUSB;
++	__u8  bDeviceClass;
++	__u8  bDeviceSubClass;
++	__u8  bDeviceProtocol;
++	__u8  bMaxPacketSize0;
++	__u8  bNumConfigurations;
++	__u8  bRESERVED;
++} __attribute__ ((packed));
++
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_OTG (from OTG 1.0a supplement) */
++struct usb_otg_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u8  bmAttributes;	/* support for HNP, SRP, etc */
++} __attribute__ ((packed));
++
++/* from usb_otg_descriptor.bmAttributes */
++#define USB_OTG_SRP		(1 << 0)
++#define USB_OTG_HNP		(1 << 1)	/* swap host/device roles */
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_DEBUG:  for special highspeed devices, replacing serial console */
++struct usb_debug_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	/* bulk endpoints with 8 byte maxpacket */
++	__u8  bDebugInEndpoint;
++	__u8  bDebugOutEndpoint;
++};
++
++/*-------------------------------------------------------------------------*/
++
++/* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
++struct usb_interface_assoc_descriptor {
++	__u8  bLength;
++	__u8  bDescriptorType;
++
++	__u8  bFirstInterface;
++	__u8  bInterfaceCount;
++	__u8  bFunctionClass;
++	__u8  bFunctionSubClass;
++	__u8  bFunctionProtocol;
++	__u8  iFunction;
++} __attribute__ ((packed));
++
++
++/*-------------------------------------------------------------------------*/
++
++/* USB 2.0 defines three speeds, here's how Linux identifies them */
++
++enum usb_device_speed {
++	USB_SPEED_UNKNOWN = 0,			/* enumerating */
++	USB_SPEED_LOW, USB_SPEED_FULL,		/* usb 1.1 */
++	USB_SPEED_HIGH				/* usb 2.0 */
++};
++
++enum usb_device_state {
++	/* NOTATTACHED isn't in the USB spec, and this state acts
++	 * the same as ATTACHED ... but it's clearer this way.
++	 */
++	USB_STATE_NOTATTACHED = 0,
++
++	/* the chapter 9 device states */
++	USB_STATE_ATTACHED,
++	USB_STATE_POWERED,
++	USB_STATE_DEFAULT,			/* limited function */
++	USB_STATE_ADDRESS,
++	USB_STATE_CONFIGURED,			/* most functions */
++
++	USB_STATE_SUSPENDED
++
++	/* NOTE:  there are actually four different SUSPENDED
++	 * states, returning to POWERED, DEFAULT, ADDRESS, or
++	 * CONFIGURED respectively when SOF tokens flow again.
++	 */
++};
++
++#endif	/* __LINUX_USB_CH9_H */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/include/linux/usb_gadget.h kernel/include/linux/usb_gadget.h
+--- /tmp/kernel/include/linux/usb_gadget.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/include/linux/usb_gadget.h	2005-04-22 17:53:19.367550424 +0200
+@@ -0,0 +1,896 @@
++/*
++ * <linux/usb_gadget.h>
++ *
++ * We call the USB code inside a Linux-based peripheral device a "gadget"
++ * driver, except for the hardware-specific bus glue.  One USB host can
++ * master many USB gadgets, but the gadgets are only slaved to one host.
++ *
++ *
++ * (C) Copyright 2002-2004 by David Brownell
++ * All Rights Reserved.
++ *
++ * This software is licensed under the GNU GPL version 2.
++ */
++
++#ifndef __LINUX_USB_GADGET_H
++#define __LINUX_USB_GADGET_H
++
++#ifdef __KERNEL__
++
++struct usb_ep;
++
++/**
++ * struct usb_request - describes one i/o request
++ * @buf: Buffer used for data.  Always provide this; some controllers
++ * 	only use PIO, or don't use DMA for some endpoints.
++ * @dma: DMA address corresponding to 'buf'.  If you don't set this
++ * 	field, and the usb controller needs one, it is responsible
++ * 	for mapping and unmapping the buffer.
++ * @length: Length of that data
++ * @no_interrupt: If true, hints that no completion irq is needed.
++ *	Helpful sometimes with deep request queues that are handled
++ *	directly by DMA controllers.
++ * @zero: If true, when writing data, makes the last packet be "short"
++ *     by adding a zero length packet as needed;
++ * @short_not_ok: When reading data, makes short packets be
++ *     treated as errors (queue stops advancing till cleanup).
++ * @complete: Function called when request completes, so this request and
++ *	its buffer may be re-used.
++ *	Reads terminate with a short packet, or when the buffer fills,
++ *	whichever comes first.  When writes terminate, some data bytes
++ *	will usually still be in flight (often in a hardware fifo).
++ *	Errors (for reads or writes) stop the queue from advancing
++ *	until the completion function returns, so that any transfers
++ *	invalidated by the error may first be dequeued.
++ * @context: For use by the completion callback
++ * @list: For use by the gadget driver.
++ * @status: Reports completion code, zero or a negative errno.
++ * 	Normally, faults block the transfer queue from advancing until
++ * 	the completion callback returns.
++ * 	Code "-ESHUTDOWN" indicates completion caused by device disconnect,
++ * 	or when the driver disabled the endpoint.
++ * @actual: Reports bytes transferred to/from the buffer.  For reads (OUT
++ * 	transfers) this may be less than the requested length.  If the
++ * 	short_not_ok flag is set, short reads are treated as errors
++ * 	even when status otherwise indicates successful completion.
++ * 	Note that for writes (IN transfers) some data bytes may still
++ * 	reside in a device-side FIFO when the request is reported as
++ *	complete.
++ *
++ * These are allocated/freed through the endpoint they're used with.  The
++ * hardware's driver can add extra per-request data to the memory it returns,
++ * which often avoids separate memory allocations (potential failures),
++ * later when the request is queued.
++ *
++ * Request flags affect request handling, such as whether a zero length
++ * packet is written (the "zero" flag), whether a short read should be
++ * treated as an error (blocking request queue advance, the "short_not_ok"
++ * flag), or hinting that an interrupt is not required (the "no_interrupt"
++ * flag, for use with deep request queues).
++ *
++ * Bulk endpoints can use any size buffers, and can also be used for interrupt
++ * transfers. interrupt-only endpoints can be much less functional.
++ */
++	// NOTE this is analagous to 'struct urb' on the host side,
++	// except that it's thinner and promotes more pre-allocation.
++
++struct usb_request {
++	void			*buf;
++	unsigned		length;
++	dma_addr_t		dma;
++
++	unsigned		no_interrupt:1;
++	unsigned		zero:1;
++	unsigned		short_not_ok:1;
++
++	void			(*complete)(struct usb_ep *ep,
++					struct usb_request *req);
++	void			*context;
++	struct list_head	list;
++
++	int			status;
++	unsigned		actual;
++};
++
++/*-------------------------------------------------------------------------*/
++
++/* endpoint-specific parts of the api to the usb controller hardware.
++ * unlike the urb model, (de)multiplexing layers are not required.
++ * (so this api could slash overhead if used on the host side...)
++ *
++ * note that device side usb controllers commonly differ in how many
++ * endpoints they support, as well as their capabilities.
++ */
++struct usb_ep_ops {
++	int (*enable) (struct usb_ep *ep,
++		const struct usb_endpoint_descriptor *desc);
++	int (*disable) (struct usb_ep *ep);
++
++	struct usb_request *(*alloc_request) (struct usb_ep *ep,
++		int gfp_flags);
++	void (*free_request) (struct usb_ep *ep, struct usb_request *req);
++
++	void *(*alloc_buffer) (struct usb_ep *ep, unsigned bytes,
++		dma_addr_t *dma, int gfp_flags);
++	void (*free_buffer) (struct usb_ep *ep, void *buf, dma_addr_t dma,
++		unsigned bytes);
++	// NOTE:  on 2.6, drivers may also use dma_map() and
++	// dma_sync_single_*() to directly manage dma overhead. 
++
++	int (*queue) (struct usb_ep *ep, struct usb_request *req,
++		int gfp_flags);
++	int (*dequeue) (struct usb_ep *ep, struct usb_request *req);
++
++	int (*set_halt) (struct usb_ep *ep, int value);
++	int (*fifo_status) (struct usb_ep *ep);
++	void (*fifo_flush) (struct usb_ep *ep);
++};
++
++/**
++ * struct usb_ep - device side representation of USB endpoint
++ * @name:identifier for the endpoint, such as "ep-a" or "ep9in-bulk"
++ * @ops: Function pointers used to access hardware-specific operations.
++ * @ep_list:the gadget's ep_list holds all of its endpoints
++ * @maxpacket:The maximum packet size used on this endpoint.  The initial
++ *	value can sometimes be reduced (hardware allowing), according to
++ *      the endpoint descriptor used to configure the endpoint.
++ * @driver_data:for use by the gadget driver.  all other fields are
++ * 	read-only to gadget drivers.
++ *
++ * the bus controller driver lists all the general purpose endpoints in
++ * gadget->ep_list.  the control endpoint (gadget->ep0) is not in that list,
++ * and is accessed only in response to a driver setup() callback.
++ */
++struct usb_ep {
++	void			*driver_data;
++
++	const char		*name;
++	const struct usb_ep_ops	*ops;
++	struct list_head	ep_list;
++	unsigned		maxpacket:16;
++};
++
++/*-------------------------------------------------------------------------*/
++
++/**
++ * usb_ep_enable - configure endpoint, making it usable
++ * @ep:the endpoint being configured.  may not be the endpoint named "ep0".
++ * 	drivers discover endpoints through the ep_list of a usb_gadget.
++ * @desc:descriptor for desired behavior.  caller guarantees this pointer
++ * 	remains valid until the endpoint is disabled; the data byte order
++ * 	is little-endian (usb-standard).
++ *
++ * when configurations are set, or when interface settings change, the driver
++ * will enable or disable the relevant endpoints.  while it is enabled, an
++ * endpoint may be used for i/o until the driver receives a disconnect() from
++ * the host or until the endpoint is disabled.
++ *
++ * the ep0 implementation (which calls this routine) must ensure that the
++ * hardware capabilities of each endpoint match the descriptor provided
++ * for it.  for example, an endpoint named "ep2in-bulk" would be usable
++ * for interrupt transfers as well as bulk, but it likely couldn't be used
++ * for iso transfers or for endpoint 14.  some endpoints are fully
++ * configurable, with more generic names like "ep-a".  (remember that for
++ * USB, "in" means "towards the USB master".)
++ *
++ * returns zero, or a negative error code.
++ */
++static inline int
++usb_ep_enable (struct usb_ep *ep, const struct usb_endpoint_descriptor *desc)
++{
++	return ep->ops->enable (ep, desc);
++}
++
++/**
++ * usb_ep_disable - endpoint is no longer usable
++ * @ep:the endpoint being unconfigured.  may not be the endpoint named "ep0".
++ *
++ * no other task may be using this endpoint when this is called.
++ * any pending and uncompleted requests will complete with status
++ * indicating disconnect (-ESHUTDOWN) before this call returns.
++ * gadget drivers must call usb_ep_enable() again before queueing
++ * requests to the endpoint.
++ *
++ * returns zero, or a negative error code.
++ */
++static inline int
++usb_ep_disable (struct usb_ep *ep)
++{
++	return ep->ops->disable (ep);
++}
++
++/**
++ * usb_ep_alloc_request - allocate a request object to use with this endpoint
++ * @ep:the endpoint to be used with with the request
++ * @gfp_flags:GFP_* flags to use
++ *
++ * Request objects must be allocated with this call, since they normally
++ * need controller-specific setup and may even need endpoint-specific
++ * resources such as allocation of DMA descriptors.
++ * Requests may be submitted with usb_ep_queue(), and receive a single
++ * completion callback.  Free requests with usb_ep_free_request(), when
++ * they are no longer needed.
++ *
++ * Returns the request, or null if one could not be allocated.
++ */
++static inline struct usb_request *
++usb_ep_alloc_request (struct usb_ep *ep, int gfp_flags)
++{
++	return ep->ops->alloc_request (ep, gfp_flags);
++}
++
++/**
++ * usb_ep_free_request - frees a request object
++ * @ep:the endpoint associated with the request
++ * @req:the request being freed
++ *
++ * Reverses the effect of usb_ep_alloc_request().
++ * Caller guarantees the request is not queued, and that it will
++ * no longer be requeued (or otherwise used).
++ */
++static inline void
++usb_ep_free_request (struct usb_ep *ep, struct usb_request *req)
++{
++	ep->ops->free_request (ep, req);
++}
++
++/**
++ * usb_ep_alloc_buffer - allocate an I/O buffer
++ * @ep:the endpoint associated with the buffer
++ * @len:length of the desired buffer
++ * @dma:pointer to the buffer's DMA address; must be valid
++ * @gfp_flags:GFP_* flags to use
++ *
++ * Returns a new buffer, or null if one could not be allocated.
++ * The buffer is suitably aligned for dma, if that endpoint uses DMA,
++ * and the caller won't have to care about dma-inconsistency
++ * or any hidden "bounce buffer" mechanism.  No additional per-request
++ * DMA mapping will be required for such buffers.
++ * Free it later with usb_ep_free_buffer().
++ *
++ * You don't need to use this call to allocate I/O buffers unless you
++ * want to make sure drivers don't incur costs for such "bounce buffer"
++ * copies or per-request DMA mappings.
++ */
++static inline void *
++usb_ep_alloc_buffer (struct usb_ep *ep, unsigned len, dma_addr_t *dma,
++	int gfp_flags)
++{
++	return ep->ops->alloc_buffer (ep, len, dma, gfp_flags);
++}
++
++/**
++ * usb_ep_free_buffer - frees an i/o buffer
++ * @ep:the endpoint associated with the buffer
++ * @buf:CPU view address of the buffer
++ * @dma:the buffer's DMA address
++ * @len:length of the buffer
++ *
++ * reverses the effect of usb_ep_alloc_buffer().
++ * caller guarantees the buffer will no longer be accessed
++ */
++static inline void
++usb_ep_free_buffer (struct usb_ep *ep, void *buf, dma_addr_t dma, unsigned len)
++{
++	ep->ops->free_buffer (ep, buf, dma, len);
++}
++
++/**
++ * usb_ep_queue - queues (submits) an I/O request to an endpoint.
++ * @ep:the endpoint associated with the request
++ * @req:the request being submitted
++ * @gfp_flags: GFP_* flags to use in case the lower level driver couldn't
++ * 	pre-allocate all necessary memory with the request.
++ *
++ * This tells the device controller to perform the specified request through
++ * that endpoint (reading or writing a buffer).  When the request completes,
++ * including being canceled by usb_ep_dequeue(), the request's completion
++ * routine is called to return the request to the driver.  Any endpoint
++ * (except control endpoints like ep0) may have more than one transfer
++ * request queued; they complete in FIFO order.  Once a gadget driver
++ * submits a request, that request may not be examined or modified until it
++ * is given back to that driver through the completion callback.
++ *
++ * Each request is turned into one or more packets.  The controller driver
++ * never merges adjacent requests into the same packet.  OUT transfers
++ * will sometimes use data that's already buffered in the hardware.
++ * Drivers can rely on the fact that the first byte of the request's buffer
++ * always corresponds to the first byte of some USB packet, for both
++ * IN and OUT transfers.
++ *
++ * Bulk endpoints can queue any amount of data; the transfer is packetized
++ * automatically.  The last packet will be short if the request doesn't fill it
++ * out completely.  Zero length packets (ZLPs) should be avoided in portable
++ * protocols since not all usb hardware can successfully handle zero length
++ * packets.  (ZLPs may be explicitly written, and may be implicitly written if
++ * the request 'zero' flag is set.)  Bulk endpoints may also be used
++ * for interrupt transfers; but the reverse is not true, and some endpoints
++ * won't support every interrupt transfer.  (Such as 768 byte packets.)
++ *
++ * Interrupt-only endpoints are less functional than bulk endpoints, for
++ * example by not supporting queueing or not handling buffers that are
++ * larger than the endpoint's maxpacket size.  They may also treat data
++ * toggle differently.
++ *
++ * Control endpoints ... after getting a setup() callback, the driver queues
++ * one response (even if it would be zero length).  That enables the
++ * status ack, after transfering data as specified in the response.  Setup
++ * functions may return negative error codes to generate protocol stalls.
++ * (Note that some USB device controllers disallow protocol stall responses
++ * in some cases.)  When control responses are deferred (the response is
++ * written after the setup callback returns), then usb_ep_set_halt() may be
++ * used on ep0 to trigger protocol stalls.
++ *
++ * For periodic endpoints, like interrupt or isochronous ones, the usb host
++ * arranges to poll once per interval, and the gadget driver usually will
++ * have queued some data to transfer at that time.
++ *
++ * Returns zero, or a negative error code.  Endpoints that are not enabled
++ * report errors; errors will also be
++ * reported when the usb peripheral is disconnected.
++ */
++static inline int
++usb_ep_queue (struct usb_ep *ep, struct usb_request *req, int gfp_flags)
++{
++	return ep->ops->queue (ep, req, gfp_flags);
++}
++
++/**
++ * usb_ep_dequeue - dequeues (cancels, unlinks) an I/O request from an endpoint
++ * @ep:the endpoint associated with the request
++ * @req:the request being canceled
++ *
++ * if the request is still active on the endpoint, it is dequeued and its
++ * completion routine is called (with status -ECONNRESET); else a negative
++ * error code is returned.
++ *
++ * note that some hardware can't clear out write fifos (to unlink the request
++ * at the head of the queue) except as part of disconnecting from usb.  such
++ * restrictions prevent drivers from supporting configuration changes,
++ * even to configuration zero (a "chapter 9" requirement).
++ */
++static inline int usb_ep_dequeue (struct usb_ep *ep, struct usb_request *req)
++{
++	return ep->ops->dequeue (ep, req);
++}
++
++/**
++ * usb_ep_set_halt - sets the endpoint halt feature.
++ * @ep: the non-isochronous endpoint being stalled
++ *
++ * Use this to stall an endpoint, perhaps as an error report.
++ * Except for control endpoints,
++ * the endpoint stays halted (will not stream any data) until the host
++ * clears this feature; drivers may need to empty the endpoint's request
++ * queue first, to make sure no inappropriate transfers happen.
++ *
++ * Note that while an endpoint CLEAR_FEATURE will be invisible to the
++ * gadget driver, a SET_INTERFACE will not be.  To reset endpoints for the
++ * current altsetting, see usb_ep_clear_halt().  When switching altsettings,
++ * it's simplest to use usb_ep_enable() or usb_ep_disable() for the endpoints.
++ *
++ * Returns zero, or a negative error code.  On success, this call sets
++ * underlying hardware state that blocks data transfers.
++ * Attempts to halt IN endpoints will fail (returning -EAGAIN) if any
++ * transfer requests are still queued, or if the controller hardware
++ * (usually a FIFO) still holds bytes that the host hasn't collected.
++ */
++static inline int
++usb_ep_set_halt (struct usb_ep *ep)
++{
++	return ep->ops->set_halt (ep, 1);
++}
++
++/**
++ * usb_ep_clear_halt - clears endpoint halt, and resets toggle
++ * @ep:the bulk or interrupt endpoint being reset
++ *
++ * Use this when responding to the standard usb "set interface" request,
++ * for endpoints that aren't reconfigured, after clearing any other state
++ * in the endpoint's i/o queue.
++ *
++ * Returns zero, or a negative error code.  On success, this call clears
++ * the underlying hardware state reflecting endpoint halt and data toggle.
++ * Note that some hardware can't support this request (like pxa2xx_udc),
++ * and accordingly can't correctly implement interface altsettings.
++ */
++static inline int
++usb_ep_clear_halt (struct usb_ep *ep)
++{
++	return ep->ops->set_halt (ep, 0);
++}
++
++/**
++ * usb_ep_fifo_status - returns number of bytes in fifo, or error
++ * @ep: the endpoint whose fifo status is being checked.
++ *
++ * FIFO endpoints may have "unclaimed data" in them in certain cases,
++ * such as after aborted transfers.  Hosts may not have collected all
++ * the IN data written by the gadget driver (and reported by a request
++ * completion).  The gadget driver may not have collected all the data
++ * written OUT to it by the host.  Drivers that need precise handling for
++ * fault reporting or recovery may need to use this call.
++ *
++ * This returns the number of such bytes in the fifo, or a negative
++ * errno if the endpoint doesn't use a FIFO or doesn't support such
++ * precise handling.
++ */
++static inline int
++usb_ep_fifo_status (struct usb_ep *ep)
++{
++	if (ep->ops->fifo_status)
++		return ep->ops->fifo_status (ep);
++	else
++		return -EOPNOTSUPP;
++}
++
++/**
++ * usb_ep_fifo_flush - flushes contents of a fifo
++ * @ep: the endpoint whose fifo is being flushed.
++ *
++ * This call may be used to flush the "unclaimed data" that may exist in
++ * an endpoint fifo after abnormal transaction terminations.  The call
++ * must never be used except when endpoint is not being used for any
++ * protocol translation.
++ */
++static inline void
++usb_ep_fifo_flush (struct usb_ep *ep)
++{
++	if (ep->ops->fifo_flush)
++		ep->ops->fifo_flush (ep);
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++struct usb_gadget;
++
++/* the rest of the api to the controller hardware: device operations,
++ * which don't involve endpoints (or i/o).
++ */
++struct usb_gadget_ops {
++	int	(*get_frame)(struct usb_gadget *);
++	int	(*wakeup)(struct usb_gadget *);
++	int	(*set_selfpowered) (struct usb_gadget *, int is_selfpowered);
++	int	(*vbus_session) (struct usb_gadget *, int is_active);
++	int	(*vbus_draw) (struct usb_gadget *, unsigned mA);
++	int	(*pullup) (struct usb_gadget *, int is_on);
++	int	(*ioctl)(struct usb_gadget *,
++				unsigned code, unsigned long param);
++};
++
++/**
++ * struct usb_gadget - represents a usb slave device
++ * @ops: Function pointers used to access hardware-specific operations.
++ * @ep0: Endpoint zero, used when reading or writing responses to
++ * 	driver setup() requests
++ * @ep_list: List of other endpoints supported by the device.
++ * @speed: Speed of current connection to USB host.
++ * @is_dualspeed: True if the controller supports both high and full speed
++ *	operation.  If it does, the gadget driver must also support both.
++ * @is_otg: True if the USB device port uses a Mini-AB jack, so that the
++ *	gadget driver must provide a USB OTG descriptor.
++ * @is_a_peripheral: False unless is_otg, the "A" end of a USB cable
++ *	is in the Mini-AB jack, and HNP has been used to switch roles
++ *	so that the "A" device currently acts as A-Peripheral, not A-Host.
++ * @a_hnp_support: OTG device feature flag, indicating that the A-Host
++ *	supports HNP at this port.
++ * @a_alt_hnp_support: OTG device feature flag, indicating that the A-Host
++ *	only supports HNP on a different root port.
++ * @b_hnp_enable: OTG device feature flag, indicating that the A-Host
++ *	enabled HNP support.
++ * @name: Identifies the controller hardware type.  Used in diagnostics
++ * 	and sometimes configuration.
++ * @dev: Driver model state for this abstract device.
++ *
++ * Gadgets have a mostly-portable "gadget driver" implementing device
++ * functions, handling all usb configurations and interfaces.  Gadget
++ * drivers talk to hardware-specific code indirectly, through ops vectors.
++ * That insulates the gadget driver from hardware details, and packages
++ * the hardware endpoints through generic i/o queues.  The "usb_gadget"
++ * and "usb_ep" interfaces provide that insulation from the hardware.
++ *
++ * Except for the driver data, all fields in this structure are
++ * read-only to the gadget driver.  That driver data is part of the
++ * "driver model" infrastructure in 2.6 (and later) kernels, and for
++ * earlier systems is grouped in a similar structure that's not known
++ * to the rest of the kernel.
++ *
++ * Values of the three OTG device feature flags are updated before the
++ * setup() call corresponding to USB_REQ_SET_CONFIGURATION, and before
++ * driver suspend() calls.  They are valid only when is_otg, and when the
++ * device is acting as a B-Peripheral (so is_a_peripheral is false).
++ */
++struct usb_gadget {
++	/* readonly to gadget driver */
++	const struct usb_gadget_ops	*ops;
++	struct usb_ep			*ep0;
++	struct list_head		ep_list;	/* of usb_ep */
++	enum usb_device_speed		speed;
++	unsigned			is_dualspeed:1;
++	unsigned			is_otg:1;
++	unsigned			is_a_peripheral:1;
++	unsigned			b_hnp_enable:1;
++	unsigned			a_hnp_support:1;
++	unsigned			a_alt_hnp_support:1;
++	const char			*name;
++
++	struct __gadget_device {
++		const char		*bus_id;
++		void			*driver_data;
++	} dev;
++};
++
++static inline void set_gadget_data (struct usb_gadget *gadget, void *data)
++	{ gadget->dev.driver_data = data; }
++static inline void *get_gadget_data (struct usb_gadget *gadget)
++	{ return gadget->dev.driver_data; }
++
++
++/* iterates the non-control endpoints; 'tmp' is a struct usb_ep pointer */
++#define gadget_for_each_ep(tmp,gadget) \
++	list_for_each_entry(tmp, &(gadget)->ep_list, ep_list)
++
++#ifndef list_for_each_entry
++/* not available in 2.4.18 */
++#define list_for_each_entry(pos, head, member)				\
++	for (pos = list_entry((head)->next, typeof(*pos), member),	\
++		     prefetch(pos->member.next);			\
++	     &pos->member != (head); 					\
++	     pos = list_entry(pos->member.next, typeof(*pos), member),	\
++		     prefetch(pos->member.next))
++#endif
++
++
++/**
++ * usb_gadget_frame_number - returns the current frame number
++ * @gadget: controller that reports the frame number
++ *
++ * Returns the usb frame number, normally eleven bits from a SOF packet,
++ * or negative errno if this device doesn't support this capability.
++ */
++static inline int usb_gadget_frame_number (struct usb_gadget *gadget)
++{
++	return gadget->ops->get_frame (gadget);
++}
++
++/**
++ * usb_gadget_wakeup - tries to wake up the host connected to this gadget
++ * @gadget: controller used to wake up the host
++ *
++ * Returns zero on success, else negative error code if the hardware
++ * doesn't support such attempts, or its support has not been enabled
++ * by the usb host.  Drivers must return device descriptors that report
++ * their ability to support this, or hosts won't enable it.
++ *
++ * This may also try to use SRP to wake the host and start enumeration,
++ * even if OTG isn't otherwise in use.  OTG devices may also start
++ * remote wakeup even when hosts don't explicitly enable it.
++ */
++static inline int usb_gadget_wakeup (struct usb_gadget *gadget)
++{
++	if (!gadget->ops->wakeup)
++		return -EOPNOTSUPP;
++	return gadget->ops->wakeup (gadget);
++}
++
++/**
++ * usb_gadget_set_selfpowered - sets the device selfpowered feature.
++ * @gadget:the device being declared as self-powered
++ *
++ * this affects the device status reported by the hardware driver
++ * to reflect that it now has a local power supply.
++ *
++ * returns zero on success, else negative errno.
++ */
++static inline int
++usb_gadget_set_selfpowered (struct usb_gadget *gadget)
++{
++	if (!gadget->ops->set_selfpowered)
++		return -EOPNOTSUPP;
++	return gadget->ops->set_selfpowered (gadget, 1);
++}
++
++/**
++ * usb_gadget_clear_selfpowered - clear the device selfpowered feature.
++ * @gadget:the device being declared as bus-powered
++ *
++ * this affects the device status reported by the hardware driver.
++ * some hardware may not support bus-powered operation, in which
++ * case this feature's value can never change.
++ *
++ * returns zero on success, else negative errno.
++ */
++static inline int
++usb_gadget_clear_selfpowered (struct usb_gadget *gadget)
++{
++	if (!gadget->ops->set_selfpowered)
++		return -EOPNOTSUPP;
++	return gadget->ops->set_selfpowered (gadget, 0);
++}
++
++/**
++ * usb_gadget_vbus_connect - Notify controller that VBUS is powered
++ * @gadget:The device which now has VBUS power.
++ *
++ * This call is used by a driver for an external transceiver (or GPIO)
++ * that detects a VBUS power session starting.  Common responses include
++ * resuming the controller, activating the D+ (or D-) pullup to let the
++ * host detect that a USB device is attached, and starting to draw power
++ * (8mA or possibly more, especially after SET_CONFIGURATION).
++ *
++ * Returns zero on success, else negative errno.
++ */
++static inline int
++usb_gadget_vbus_connect(struct usb_gadget *gadget)
++{
++	if (!gadget->ops->vbus_session)
++		return -EOPNOTSUPP;
++	return gadget->ops->vbus_session (gadget, 1);
++}
++
++/**
++ * usb_gadget_vbus_draw - constrain controller's VBUS power usage
++ * @gadget:The device whose VBUS usage is being described
++ * @mA:How much current to draw, in milliAmperes.  This should be twice
++ *	the value listed in the configuration descriptor bMaxPower field.
++ *
++ * This call is used by gadget drivers during SET_CONFIGURATION calls,
++ * reporting how much power the device may consume.  For example, this
++ * could affect how quickly batteries are recharged.
++ *
++ * Returns zero on success, else negative errno.
++ */
++static inline int
++usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
++{
++	if (!gadget->ops->vbus_draw)
++		return -EOPNOTSUPP;
++	return gadget->ops->vbus_draw (gadget, mA);
++}
++
++/**
++ * usb_gadget_vbus_disconnect - notify controller about VBUS session end
++ * @gadget:the device whose VBUS supply is being described
++ *
++ * This call is used by a driver for an external transceiver (or GPIO)
++ * that detects a VBUS power session ending.  Common responses include
++ * reversing everything done in usb_gadget_vbus_connect().
++ *
++ * Returns zero on success, else negative errno.
++ */
++static inline int
++usb_gadget_vbus_disconnect(struct usb_gadget *gadget)
++{
++	if (!gadget->ops->vbus_session)
++		return -EOPNOTSUPP;
++	return gadget->ops->vbus_session (gadget, 0);
++}
++
++/**
++ * usb_gadget_connect - software-controlled connect to USB host
++ * @gadget:the peripheral being connected
++ *
++ * Enables the D+ (or potentially D-) pullup.  The host will start
++ * enumerating this gadget when the pullup is active and a VBUS session
++ * is active (the link is powered).  This pullup is always enabled unless
++ * usb_gadget_disconnect() has been used to disable it.
++ *
++ * Returns zero on success, else negative errno.
++ */
++static inline int
++usb_gadget_connect (struct usb_gadget *gadget)
++{
++	if (!gadget->ops->pullup)
++		return -EOPNOTSUPP;
++	return gadget->ops->pullup (gadget, 1);
++}
++
++/**
++ * usb_gadget_disconnect - software-controlled disconnect from USB host
++ * @gadget:the peripheral being disconnected
++ *
++ * Disables the D+ (or potentially D-) pullup, which the host may see
++ * as a disconnect (when a VBUS session is active).  Not all systems
++ * support software pullup controls.
++ *
++ * This routine may be used during the gadget driver bind() call to prevent
++ * the peripheral from ever being visible to the USB host, unless later
++ * usb_gadget_connect() is called.  For example, user mode components may
++ * need to be activated before the system can talk to hosts.
++ *
++ * Returns zero on success, else negative errno.
++ */
++static inline int
++usb_gadget_disconnect (struct usb_gadget *gadget)
++{
++	if (!gadget->ops->pullup)
++		return -EOPNOTSUPP;
++	return gadget->ops->pullup (gadget, 0);
++}
++
++
++
++/*-------------------------------------------------------------------------*/
++
++/**
++ * struct usb_gadget_driver - driver for usb 'slave' devices
++ * @function: String describing the gadget's function
++ * @speed: Highest speed the driver handles.
++ * @bind: Invoked when the driver is bound to a gadget, usually
++ * 	after registering the driver.
++ * 	At that point, ep0 is fully initialized, and ep_list holds
++ * 	the currently-available endpoints.
++ * 	Called in a context that permits sleeping.
++ * @setup: Invoked for ep0 control requests that aren't handled by
++ * 	the hardware level driver. Most calls must be handled by
++ * 	the gadget driver, including descriptor and configuration
++ * 	management.  The 16 bit members of the setup data are in
++ * 	cpu order. Called in_interrupt; this may not sleep.  Driver
++ *	queues a response to ep0, or returns negative to stall.
++ * @disconnect: Invoked after all transfers have been stopped,
++ * 	when the host is disconnected.  May be called in_interrupt; this
++ * 	may not sleep.  Some devices can't detect disconnect, so this might
++ *	not be called except as part of controller shutdown.
++ * @unbind: Invoked when the driver is unbound from a gadget,
++ * 	usually from rmmod (after a disconnect is reported).
++ * 	Called in a context that permits sleeping.
++ * @suspend: Invoked on USB suspend.  May be called in_interrupt.
++ * @resume: Invoked on USB resume.  May be called in_interrupt.
++ * @driver: Driver model state for this driver.
++ *
++ * Devices are disabled till a gadget driver successfully bind()s, which
++ * means the driver will handle setup() requests needed to enumerate (and
++ * meet "chapter 9" requirements) then do some useful work.
++ *
++ * If gadget->is_otg is true, the gadget driver must provide an OTG
++ * descriptor during enumeration, or else fail the bind() call.  In such
++ * cases, no USB traffic may flow until both bind() returns without
++ * having called usb_gadget_disconnect(), and the USB host stack has
++ * initialized.
++ *
++ * Drivers use hardware-specific knowledge to configure the usb hardware.
++ * endpoint addressing is only one of several hardware characteristics that
++ * are in descriptors the ep0 implementation returns from setup() calls.
++ *
++ * Except for ep0 implementation, most driver code shouldn't need change to
++ * run on top of different usb controllers.  It'll use endpoints set up by
++ * that ep0 implementation.
++ *
++ * The usb controller driver handles a few standard usb requests.  Those
++ * include set_address, and feature flags for devices, interfaces, and
++ * endpoints (the get_status, set_feature, and clear_feature requests).
++ *
++ * Accordingly, the driver's setup() callback must always implement all
++ * get_descriptor requests, returning at least a device descriptor and
++ * a configuration descriptor.  Drivers must make sure the endpoint
++ * descriptors match any hardware constraints. Some hardware also constrains
++ * other descriptors. (The pxa250 allows only configurations 1, 2, or 3).
++ *
++ * The driver's setup() callback must also implement set_configuration,
++ * and should also implement set_interface, get_configuration, and
++ * get_interface.  Setting a configuration (or interface) is where
++ * endpoints should be activated or (config 0) shut down.
++ *
++ * (Note that only the default control endpoint is supported.  Neither
++ * hosts nor devices generally support control traffic except to ep0.)
++ *
++ * Most devices will ignore USB suspend/resume operations, and so will
++ * not provide those callbacks.  However, some may need to change modes
++ * when the host is not longer directing those activities.  For example,
++ * local controls (buttons, dials, etc) may need to be re-enabled since
++ * the (remote) host can't do that any longer; or an error state might
++ * be cleared, to make the device behave identically whether or not
++ * power is maintained.
++ */
++struct usb_gadget_driver {
++	char			*function;
++	enum usb_device_speed	speed;
++	int			(*bind)(struct usb_gadget *);
++	void			(*unbind)(struct usb_gadget *);
++	int			(*setup)(struct usb_gadget *,
++					const struct usb_ctrlrequest *);
++	void			(*disconnect)(struct usb_gadget *);
++	void			(*suspend)(struct usb_gadget *);
++	void			(*resume)(struct usb_gadget *);
++
++	// FIXME support safe rmmod
++	struct __gadget_driver {
++		const char	*name;
++		void		*driver_data;
++	} driver;
++};
++
++
++
++/*-------------------------------------------------------------------------*/
++
++/* driver modules register and unregister, as usual.
++ * these calls must be made in a context that can sleep.
++ *
++ * these will usually be implemented directly by the hardware-dependent
++ * usb bus interface driver, which will only support a single driver.
++ */
++
++/**
++ * usb_gadget_register_driver - register a gadget driver
++ * @driver:the driver being registered
++ *
++ * Call this in your gadget driver's module initialization function,
++ * to tell the underlying usb controller driver about your driver.
++ * The driver's bind() function will be called to bind it to a
++ * gadget.  This function must be called in a context that can sleep.
++ */
++int usb_gadget_register_driver (struct usb_gadget_driver *driver);
++
++/**
++ * usb_gadget_unregister_driver - unregister a gadget driver
++ * @driver:the driver being unregistered
++ *
++ * Call this in your gadget driver's module cleanup function,
++ * to tell the underlying usb controller that your driver is
++ * going away.  If the controller is connected to a USB host,
++ * it will first disconnect().  The driver is also requested
++ * to unbind() and clean up any device state, before this procedure
++ * finally returns.
++ * This function must be called in a context that can sleep.
++ */
++int usb_gadget_unregister_driver (struct usb_gadget_driver *driver);
++
++/*-------------------------------------------------------------------------*/
++
++/* utility to simplify dealing with string descriptors */
++
++/**
++ * struct usb_string - wraps a C string and its USB id
++ * @id:the (nonzero) ID for this string
++ * @s:the string, in UTF-8 encoding
++ *
++ * If you're using usb_gadget_get_string(), use this to wrap a string
++ * together with its ID.
++ */
++struct usb_string {
++	u8			id;
++	const char		*s;
++};
++
++/**
++ * struct usb_gadget_strings - a set of USB strings in a given language
++ * @language:identifies the strings' language (0x0409 for en-us)
++ * @strings:array of strings with their ids
++ *
++ * If you're using usb_gadget_get_string(), use this to wrap all the
++ * strings for a given language.
++ */
++struct usb_gadget_strings {
++	u16			language;	/* 0x0409 for en-us */
++	struct usb_string	*strings;
++};
++
++/* put descriptor for string with that id into buf (buflen >= 256) */
++int usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf);
++
++/*-------------------------------------------------------------------------*/
++
++/* utility to simplify managing config descriptors */
++
++/* write vector of descriptors into buffer */
++int usb_descriptor_fillbuf(void *, unsigned,
++		const struct usb_descriptor_header **);
++
++/* build config descriptor from single descriptor vector */
++int usb_gadget_config_buf(const struct usb_config_descriptor *config,
++	void *buf, unsigned buflen, const struct usb_descriptor_header **desc);
++
++/*-------------------------------------------------------------------------*/
++
++/* utility wrapping a simple endpoint selection policy */
++
++extern struct usb_ep *usb_ep_autoconfig (struct usb_gadget *,
++			struct usb_endpoint_descriptor *) __init;
++
++extern void usb_ep_autoconfig_reset (struct usb_gadget *) __init;
++
++#endif  /* __KERNEL__ */
++
++#endif	/* __LINUX_USB_GADGET_H */
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/include/linux/usb_gadgetfs.h kernel/include/linux/usb_gadgetfs.h
+--- /tmp/kernel/include/linux/usb_gadgetfs.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/include/linux/usb_gadgetfs.h	2005-04-22 17:53:19.370549935 +0200
+@@ -0,0 +1,75 @@
++
++#include <asm/types.h>
++#include <asm/ioctl.h>
++
++#include <linux/usb_ch9.h>
++
++/*
++ * Filesystem based user-mode API to USB Gadget controller hardware
++ *
++ * Almost everything can be done with only read and write operations,
++ * on endpoint files found in one directory.  They are configured by
++ * writing descriptors, and then may be used for normal stream style
++ * i/o requests.  When ep0 is configured, the device can enumerate;
++ * when it's closed, the device disconnects from usb.
++ *
++ * Configuration and device descriptors get written to /dev/gadget/$CHIP,
++ * which may then be used to read usb_gadgetfs_event structs.  The driver
++ * may activate endpoints as it handles SET_CONFIGURATION setup events,
++ * or earlier; writing endpoint descriptors to /dev/gadget/$ENDPOINT
++ * then performing data transfers by reading or writing.
++ */
++
++/*
++ * Events are delivered on the ep0 file descriptor, if the user mode driver
++ * reads from this file descriptor after writing the descriptors.  Don't
++ * stop polling this descriptor, if you write that kind of driver.
++ */
++
++enum usb_gadgetfs_event_type {
++	GADGETFS_NOP = 0,
++
++	GADGETFS_CONNECT,
++	GADGETFS_DISCONNECT,
++	GADGETFS_SETUP,
++	GADGETFS_SUSPEND,
++	// and likely more !
++};
++
++struct usb_gadgetfs_event {
++	enum usb_gadgetfs_event_type	type;
++	union {
++		// NOP, DISCONNECT, SUSPEND: nothing
++		// ... some hardware can't report disconnection
++
++		// CONNECT: just the speed
++		enum usb_device_speed	speed;
++
++		// SETUP: packet; DATA phase i/o precedes next event
++		// (setup.bmRequestType & USB_DIR_IN) flags direction 
++		// ... includes SET_CONFIGURATION, SET_INTERFACE
++		struct usb_ctrlrequest	setup;
++	} u;
++};
++
++
++/* endpoint ioctls */
++
++/* IN transfers may be reported to the gadget driver as complete
++ * 	when the fifo is loaded, before the host reads the data;
++ * OUT transfers may be reported to the host's "client" driver as
++ * 	complete when they're sitting in the FIFO unread.
++ * THIS returns how many bytes are "unclaimed" in the endpoint fifo
++ * (needed for precise fault handling, when the hardware allows it)
++ */
++#define	GADGETFS_FIFO_STATUS	_IO('g',1)
++
++/* discards any unclaimed data in the fifo. */
++#define	GADGETFS_FIFO_FLUSH	_IO('g',2)
++
++/* resets endpoint halt+toggle; used to implement set_interface.
++ * some hardware (like pxa2xx) can't support this.
++ */
++#define	GADGETFS_CLEAR_HALT	_IO('g',3)
++
++
+diff -x '*~' -x '.*' -r -N -u /tmp/kernel/include/linux/usb_scanner_ioctl.h kernel/include/linux/usb_scanner_ioctl.h
+--- /tmp/kernel/include/linux/usb_scanner_ioctl.h	1970-01-01 01:00:00.000000000 +0100
++++ kernel/include/linux/usb_scanner_ioctl.h	2005-04-22 17:53:19.372549610 +0200
+@@ -0,0 +1,9 @@
++/* USB Scanner IOCTLS */
++
++/* read vendor and product IDs from the scanner */
++#define SCANNER_IOCTL_VENDOR _IOR('U', 0x20, int)
++#define SCANNER_IOCTL_PRODUCT _IOR('U', 0x21, int)
++/* send/recv a control message to the scanner */
++#define SCANNER_IOCTL_CTRLMSG _IOWR('U', 0x22, struct usb_ctrlrequest )
++
++
diff --git a/recipes/linux/files/linux-2.4.18-list_move.patch b/recipes/linux/files/linux-2.4.18-list_move.patch
new file mode 100644
index 0000000000..faec56330b
--- /dev/null
+++ b/recipes/linux/files/linux-2.4.18-list_move.patch
@@ -0,0 +1,32 @@
+--- linux/include/linux/list.h~	2001-12-21 17:42:03.000000000 +0000
++++ linux/include/linux/list.h	2004-06-14 23:41:33.000000000 +0100
+@@ -105,6 +105,29 @@
+ }
+ 
+ /**
++ * list_move - delete from one list and add as another's head
++ * @list: the entry to move
++ * @head: the head that will precede our entry
++ */
++static inline void list_move(struct list_head *list, struct list_head *head)
++{
++        __list_del(list->prev, list->next);
++        list_add(list, head);
++}
++
++/**
++ * list_move_tail - delete from one list and add as another's tail
++ * @list: the entry to move
++ * @head: the head that will follow our entry
++ */
++static inline void list_move_tail(struct list_head *list,
++				  struct list_head *head)
++{
++        __list_del(list->prev, list->next);
++        list_add_tail(list, head);
++}
++
++/**
+  * list_empty - tests whether a list is empty
+  * @head: the list to test.
+  */
diff --git a/recipes/linux/files/mipv6-1.1-v2.4.25.patch b/recipes/linux/files/mipv6-1.1-v2.4.25.patch
new file mode 100644
index 0000000000..b7f9b8fc8a
--- /dev/null
+++ b/recipes/linux/files/mipv6-1.1-v2.4.25.patch
@@ -0,0 +1,19832 @@
+diff -uprN linux-2.4.25.old/Documentation/Configure.help linux-2.4.25/Documentation/Configure.help
+--- linux-2.4.25.old/Documentation/Configure.help	2004-06-26 11:22:00.000000000 +0100
++++ linux-2.4.25/Documentation/Configure.help	2004-06-26 11:29:29.000000000 +0100
+@@ -6204,6 +6204,57 @@ CONFIG_IPV6
+ 
+   It is safe to say N here for now.
+ 
++IPv6: IPv6 over IPv6 Tunneling (EXPERIMENTAL)
++CONFIG_IPV6_TUNNEL
++  Experimental IP6-IP6 tunneling.  You must select this, if you want
++  to use CONFIG_IPV6_MOBILITY.  More information in MIPL Mobile IPv6
++  instructions.
++
++  If you don't want IP6-IP6 tunnels and Mobile IPv6, say N.
++
++IPv6: Mobility Support (EXPERIMENTAL)
++CONFIG_IPV6_MOBILITY
++  This is experimental support for the upcoming specification of
++  Mobile IPv6. Mobile IPv6 allows nodes to seamlessly move between
++  networks without changing their IP addresses, thus allowing them to
++  maintain upper layer connections (e.g. TCP).  Selecting this option
++  allows your computer to act as a Correspondent Node (CN).  A MIPv6
++  Mobile Node will be able to communicate with the CN and use route
++  optimization.
++
++  For more information and configuration details, see
++  http://www.mipl.mediapoli.com/.
++
++  If unsure, say N.
++
++MIPv6: Mobile Node Support
++CONFIG_IPV6_MOBILITY_MN
++  If you want your computer to be a MIPv6 Mobile Node (MN), select
++  this option.  You must configure MN using the userspace tools
++  available at http://www.mipl.mediapoli.com/download/mipv6-tools/.
++
++  If your computer is stationary, or you are unsure if you need this,
++  say N.  Note that you will need a properly configured MIPv6 Home
++  Agent to use any Mobile Nodes.
++
++MIPv6: Home Agent Support
++CONFIG_IPV6_MOBILITY_HA
++  If you want your router to serve as a MIPv6 Home Agent (HA), select
++  this option.  You must configure HA using the userspace tools
++  available at http://www.mipl.mediapoli.com/download/mipv6-tools/.
++
++  If your computer is not a router, or you are unsure if you need
++  this, say N.
++
++MIPv6: Debug messages
++CONFIG_IPV6_MOBILITY_DEBUG
++  MIPL Mobile IPv6 can produce a lot of debugging messages. There are
++  eight debug levels (0 through 7) and the level is controlled via
++  /proc/sys/net/ipv6/mobility/debuglevel. Since MIPL is still
++  experimental, you might want to say Y here.
++
++  Be sure to say Y and record debug messages when submitting a bug
++  report.
+ The SCTP Protocol (EXPERIMENTAL)
+ CONFIG_IP_SCTP
+   Stream Control Transmission Protocol
+diff -uprN linux-2.4.25.old/Documentation/DocBook/Makefile linux-2.4.25/Documentation/DocBook/Makefile
+--- linux-2.4.25.old/Documentation/DocBook/Makefile	2002-11-28 23:53:08.000000000 +0000
++++ linux-2.4.25/Documentation/DocBook/Makefile	2004-06-26 11:29:29.000000000 +0100
+@@ -2,7 +2,7 @@ BOOKS	:= wanbook.sgml z8530book.sgml mca
+ 	   kernel-api.sgml parportbook.sgml kernel-hacking.sgml \
+ 	   kernel-locking.sgml via-audio.sgml mousedrivers.sgml sis900.sgml \
+ 	   deviceiobook.sgml procfs-guide.sgml tulip-user.sgml \
+-	   journal-api.sgml
++	   journal-api.sgml mip6-func.sgml
+ 
+ PS	:=	$(patsubst %.sgml, %.ps, $(BOOKS))
+ PDF	:=	$(patsubst %.sgml, %.pdf, $(BOOKS))
+@@ -86,6 +86,9 @@ videobook.sgml: videobook.tmpl $(TOPDIR)
+ procfs-guide.sgml:  procfs-guide.tmpl procfs_example.sgml
+ 	$(TOPDIR)/scripts/docgen < procfs-guide.tmpl >$@
+ 
++mip6-func.sgml: mip6-func.tmpl
++	$(TOPDIR)/scripts/docgen <$< >$@
++
+ APISOURCES :=	$(TOPDIR)/drivers/media/video/videodev.c \
+ 		$(TOPDIR)/arch/i386/kernel/irq.c \
+ 		$(TOPDIR)/arch/i386/kernel/mca.c \
+diff -uprN linux-2.4.25.old/Documentation/DocBook/mip6-func.tmpl linux-2.4.25/Documentation/DocBook/mip6-func.tmpl
+--- linux-2.4.25.old/Documentation/DocBook/mip6-func.tmpl	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/Documentation/DocBook/mip6-func.tmpl	2004-06-26 11:29:29.000000000 +0100
+@@ -0,0 +1,756 @@
++<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook V3.1//EN"[]>
++<book id="LinuxMobileIPv6">
++ <bookinfo>
++  <title>MIPL Mobile IPv6 Function Reference Guide</title>
++
++  <authorgroup>
++    <author>
++      <othername>MIPL Mobile IPv6 for Linux Team</othername>
++      <affiliation>
++       <orgname>Helsinki University of Technology</orgname>
++       <orgdiv>Telecommunications Software and Multimedia Lab</orgdiv>
++       <address>
++        <pob>PO BOX 9201</pob>
++	<postcode>FIN-02015 HUT</postcode>
++	<country>Finland</country>
++        <email>mipl@list.mipl.mediapoli.com</email>
++       </address>
++      </affiliation>
++     </author>
++  </authorgroup>
++
++  <copyright>
++   <year>2000-2001</year>
++   <holder>Helsinki University of Technology</holder>
++  </copyright>
++ 
++  <legalnotice>
++   <para>
++     Copyright (c) 2001, 2002 MIPL Mobile IPv6 for Linux Team.
++   </para>
++   <para>
++     Permission is granted to copy, distribute and/or modify this
++     document under the terms of the GNU Free Documentation License,
++     Version 1.1 published by the Free Software Foundation; with the
++     Invariant Sections being "Introduction", with the Front-Cover
++     Texts being "MIPL Mobile IPv6 Function Reference Guide", "MIPL
++     Mobile IPv6 for Linux Team" and "Helsinki University of
++     Technology".  A copy of the license is included in <xref
++     linkend="gfdl">.
++   </para>
++      
++  </legalnotice>
++ </bookinfo>
++
++<toc></toc>
++
++  <preface id="intro">
++     <title>Introduction</title>
++
++     <para>
++       MIPL Mobile IPv6 for Linux is an implementation of Mobility
++       Support in IPv6 IETF mobile-ip working groups Internet-Draft
++       (draft-ietf-mobileip-ipv6).  This implementation has been
++       developed in the Telecommunications Software and Multimedia
++       Laboratory at Helsinki University of Technology.
++     </para>
++
++     <para>
++       MIPL is fully open source, licensed under the GNU General
++       Public License.  Latest source for MIPL can be downloaded from
++       the MIPL website at:
++     </para>
++     <programlisting>
++       http://www.mipl.mediapoli.com/.
++     </programlisting>
++     <para>
++       Developers and users interested in MIPL can subscribe to the
++       MIPL mailing list by sending e-mail to
++       <email>majordomo@list.mipl.mediapoli.com</email> with
++     </para>
++     <programlisting>
++       subscribe mipl
++     </programlisting>
++     <para>
++       in the body of the message.
++     </para>
++
++     <para>
++       This document is a reference guide to MIPL functions.  Intended
++       audience is developers wishing to contribute to the project.
++       Hopefully this document will make it easier and quicker to
++       understand and adopt the inner workings of MIPL Mobile IPv6.
++     </para>
++
++     <para>
++       MIPL Mobile IPv6 for Linux Team members (past and present):
++
++       <itemizedlist>
++        <listitem>
++	<address>
++	Sami Kivisaari <email>Sami.Kivisaari@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Niklas Kampe <email>Niklas.Kampe@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Juha Mynttinen <email>Juha.Mynttinen@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Toni Nykanen <email>Toni.Nykanen@iki.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Henrik Petander <email>Henrik.Petander@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Antti Tuominen <email>ajtuomin@tml.hut.fi</email>
++	</address>
++        </listitem>
++       </itemizedlist>
++
++       <itemizedlist>
++        <listitem>
++	<address>
++	Marko Myllynen
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Ville Nuorvala <email>vnuorval@tcs.hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Jaakko Laine <email>Jaakko.Laine@hut.fi</email>
++	</address>
++        </listitem>
++       </itemizedlist>
++     </para>
++
++  </preface>
++
++  <chapter id="common">
++     <title>Common functions for all entities</title>
++
++     <sect1><title>Low-level functions</title>
++     <para>
++       These functions implement memory allocation used by others.
++       Hashlist functions implement a linked list with hash lookup,
++       which is used with Binding Update List, Binding Cache, Home
++       Agents List etc.
++     </para>
++!Inet/ipv6/mobile_ip6/mempool.h
++!Inet/ipv6/mobile_ip6/hashlist.h
++     </sect1>
++
++     <sect1><title>Debug functions</title>
++     <para>
++       Debug and utility functions.  These functions are available if
++       <constant>CONFIG_IPV6_MOBILITY_DEBUG</constant> is set.
++       Otherwise macros expand to no operation.
++     </para>
++!Inet/ipv6/mobile_ip6/debug.h
++!Inet/ipv6/mobile_ip6/mipv6.c
++     </sect1>
++
++     <sect1><title>Extension Header functions</title>
++     <para>
++       These functions create and handle extension headers that are
++       specific to MIPv6.
++     </para>
++!Inet/ipv6/mobile_ip6/exthdrs.c
++     </sect1>
++
++     <sect1><title>Mobility Header functions</title>
++     <para>
++       MIPv6 specifies a new protocol called Mobility Header.
++       Mobility Header has several message types.  Messages may also
++       carry Mobility Options.  These functions are used to create and
++       handle Mobility Headers and Mobility Options.
++     </para>
++!Inet/ipv6/mobile_ip6/sendopts.c
++!Inet/ipv6/mobile_ip6/mh_recv.c
++!Inet/ipv6/mobile_ip6/auth_subopt.c
++     </sect1>
++
++     <sect1><title>Binding Cache</title>
++     <para>
++       All Mobile IPv6 entities have a binding cache.  These functions
++       provide easy manipulation of the binding cache.
++     </para>
++!Inet/ipv6/mobile_ip6/bcache.c
++     </sect1>
++
++     <sect1><title>Security</title>
++
++     <para>
++       These functions are common authentication functions and
++       implement Draft 13 style IPSec AH support for Binding Updates.
++     </para>
++!Inet/ipv6/mobile_ip6/ah_algo.c
++!Inet/ipv6/mobile_ip6/sadb.c
++!Inet/ipv6/mobile_ip6/ah.c
++     </sect1>
++
++     <sect1><title>Utility functions</title>
++
++     <para>
++       These functions are general utility functions commonly used by
++       all entities.
++     </para>
++!Inet/ipv6/mobile_ip6/util.c
++     </sect1>
++
++  </chapter>
++
++  <chapter id="mn">
++     <title>Mobile Node functions</title>
++     <sect1><title>General functions</title>
++     <para>
++     </para>
++!Inet/ipv6/mobile_ip6/mn.c
++     </sect1>
++
++     <sect1><title>Binding Update List</title>
++     <para>
++       Mobile Node keeps track of sent binding updates in Binding
++       Update List.
++     </para>
++!Inet/ipv6/mobile_ip6/bul.c
++     </sect1>
++
++     <sect1><title>Movement detection</title>
++
++     <para>
++       These functions are used by the mobile node for movement
++       detection.
++     </para>
++!Inet/ipv6/mobile_ip6/mdetect.c
++     </sect1>
++  </chapter>
++
++  <chapter id="ha">
++     <title>Home Agent functions</title>
++     <sect1><title>General functions</title>
++     <para>
++     </para>
++!Inet/ipv6/mobile_ip6/ha.c
++     </sect1>
++
++     <sect1><title>Duplicate Address Detection functions</title>
++     <para>
++       Home Agent does Duplicate Address Detection for Mobile Nodes'
++       addresses.  These functions implement MIPv6 specific DAD
++       functionality.
++     </para>
++!Inet/ipv6/mobile_ip6/dad.c
++     </sect1>
++
++  </chapter>
++  <appendix id="gfdl">
++     <title>GNU Free Documentation License</title>
++
++     <para>
++       Version 1.1, March 2000
++     </para>
++
++     <programlisting>
++       Copyright (C) 2000  Free Software Foundation, Inc.
++       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++       Everyone is permitted to copy and distribute verbatim copies
++       of this license document, but changing it is not allowed.
++     </programlisting>
++
++     <sect1><title>0. PREAMBLE</title>
++
++     <para>
++       The purpose of this License is to make a manual, textbook, or
++       other written document "free" in the sense of freedom: to
++       assure everyone the effective freedom to copy and redistribute
++       it, with or without modifying it, either commercially or
++       noncommercially. Secondarily, this License preserves for the
++       author and publisher a way to get credit for their work, while
++       not being considered responsible for modifications made by
++       others.
++     </para>
++
++     <para>
++       This License is a kind of "copyleft", which means that
++       derivative works of the document must themselves be free in the
++       same sense. It complements the GNU General Public License,
++       which is a copyleft license designed for free software.
++     </para>
++
++     <para>
++       We have designed this License in order to use it for manuals
++       for free software, because free software needs free
++       documentation: a free program should come with manuals
++       providing the same freedoms that the software does. But this
++       License is not limited to software manuals; it can be used for
++       any textual work, regardless of subject matter or whether it is
++       published as a printed book. We recommend this License
++       principally for works whose purpose is instruction or
++       reference.
++     </para>
++
++     </sect1>
++     <sect1><title>1. APPLICABILITY AND DEFINITIONS</title>
++
++     <para>
++       This License applies to any manual or other work that contains
++       a notice placed by the copyright holder saying it can be
++       distributed under the terms of this License. The "Document",
++       below, refers to any such manual or work. Any member of the
++       public is a licensee, and is addressed as "you".
++     </para>
++
++     <para>
++       A "Modified Version" of the Document means any work containing
++       the Document or a portion of it, either copied verbatim, or
++       with modifications and/or translated into another language.
++     </para>
++
++     <para>
++       A "Secondary Section" is a named appendix or a front-matter
++       section of the Document that deals exclusively with the
++       relationship of the publishers or authors of the Document to
++       the Document's overall subject (or to related matters) and
++       contains nothing that could fall directly within that overall
++       subject. (For example, if the Document is in part a textbook of
++       mathematics, a Secondary Section may not explain any
++       mathematics.) The relationship could be a matter of historical
++       connection with the subject or with related matters, or of
++       legal, commercial, philosophical, ethical or political position
++       regarding them.
++     </para>
++
++     <para>
++       The "Invariant Sections" are certain Secondary Sections whose
++       titles are designated, as being those of Invariant Sections, in
++       the notice that says that the Document is released under this
++       License.
++     </para>
++
++     <para>
++       The "Cover Texts" are certain short passages of text that are
++       listed, as Front-Cover Texts or Back-Cover Texts, in the notice
++       that says that the Document is released under this License.
++     </para>
++
++     <para>
++       A "Transparent" copy of the Document means a machine-readable
++       copy, represented in a format whose specification is available
++       to the general public, whose contents can be viewed and edited
++       directly and straightforwardly with generic text editors or
++       (for images composed of pixels) generic paint programs or (for
++       drawings) some widely available drawing editor, and that is
++       suitable for input to text formatters or for automatic
++       translation to a variety of formats suitable for input to text
++       formatters. A copy made in an otherwise Transparent file format
++       whose markup has been designed to thwart or discourage
++       subsequent modification by readers is not Transparent. A copy
++       that is not "Transparent" is called "Opaque".
++     </para>
++
++     <para>
++       Examples of suitable formats for Transparent copies include
++       plain ASCII without markup, Texinfo input format, LaTeX input
++       format, SGML or XML using a publicly available DTD, and
++       standard-conforming simple HTML designed for human
++       modification. Opaque formats include PostScript, PDF,
++       proprietary formats that can be read and edited only by
++       proprietary word processors, SGML or XML for which the DTD
++       and/or processing tools are not generally available, and the
++       machine-generated HTML produced by some word processors for
++       output purposes only.
++     </para>
++
++     <para>
++       The "Title Page" means, for a printed book, the title page
++       itself, plus such following pages as are needed to hold,
++       legibly, the material this License requires to appear in the
++       title page. For works in formats which do not have any title
++       page as such, "Title Page" means the text near the most
++       prominent appearance of the work's title, preceding the
++       beginning of the body of the text.
++     </para>
++
++     </sect1>
++     <sect1><title>2. VERBATIM COPYING</title>
++
++     <para>
++       You may copy and distribute the Document in any medium, either
++       commercially or noncommercially, provided that this License,
++       the copyright notices, and the license notice saying this
++       License applies to the Document are reproduced in all copies,
++       and that you add no other conditions whatsoever to those of
++       this License. You may not use technical measures to obstruct or
++       control the reading or further copying of the copies you make
++       or distribute. However, you may accept compensation in exchange
++       for copies. If you distribute a large enough number of copies
++       you must also follow the conditions in section 3.
++     </para>
++
++     <para>
++       You may also lend copies, under the same conditions stated
++       above, and you may publicly display copies.
++     </para>
++
++     </sect1>
++     <sect1><title>3. COPYING IN QUANTITY</title>
++
++     <para>
++       If you publish printed copies of the Document numbering more
++       than 100, and the Document's license notice requires Cover
++       Texts, you must enclose the copies in covers that carry,
++       clearly and legibly, all these Cover Texts: Front-Cover Texts
++       on the front cover, and Back-Cover Texts on the back
++       cover. Both covers must also clearly and legibly identify you
++       as the publisher of these copies. The front cover must present
++       the full title with all words of the title equally prominent
++       and visible. You may add other material on the covers in
++       addition. Copying with changes limited to the covers, as long
++       as they preserve the title of the Document and satisfy these
++       conditions, can be treated as verbatim copying in other
++       respects.
++     </para>
++
++     <para>
++       If the required texts for either cover are too voluminous to
++       fit legibly, you should put the first ones listed (as many as
++       fit reasonably) on the actual cover, and continue the rest onto
++       adjacent pages.
++     </para>
++
++     <para>
++       If you publish or distribute Opaque copies of the Document
++       numbering more than 100, you must either include a
++       machine-readable Transparent copy along with each Opaque copy,
++       or state in or with each Opaque copy a publicly-accessible
++       computer-network location containing a complete Transparent
++       copy of the Document, free of added material, which the general
++       network-using public has access to download anonymously at no
++       charge using public-standard network protocols. If you use the
++       latter option, you must take reasonably prudent steps, when you
++       begin distribution of Opaque copies in quantity, to ensure that
++       this Transparent copy will remain thus accessible at the stated
++       location until at least one year after the last time you
++       distribute an Opaque copy (directly or through your agents or
++       retailers) of that edition to the public.
++     </para>
++
++     <para>
++       It is requested, but not required, that you contact the authors
++       of the Document well before redistributing any large number of
++       copies, to give them a chance to provide you with an updated
++       version of the Document.
++     </para>
++
++     </sect1>
++     <sect1><title>4. MODIFICATIONS</title>
++
++     <para>
++       You may copy and distribute a Modified Version of the Document
++       under the conditions of sections 2 and 3 above, provided that
++       you release the Modified Version under precisely this License,
++       with the Modified Version filling the role of the Document,
++       thus licensing distribution and modification of the Modified
++       Version to whoever possesses a copy of it. In addition, you
++       must do these things in the Modified Version:
++     </para>
++
++     <para>
++      <itemizedlist spacing=compact>
++       <listitem>
++        <para>
++        A. Use in the Title Page (and on the covers, if any) a title
++        distinct from that of the Document, and from those of previous
++        versions (which should, if there were any, be listed in the
++        History section of the Document). You may use the same title
++        as a previous version if the original publisher of that
++        version gives permission.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	B. List on the Title Page, as authors, one or more persons
++	or entities responsible for authorship of the modifications in
++	the Modified Version, together with at least five of the
++	principal authors of the Document (all of its principal
++	authors, if it has less than five).
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	C. State on the Title page the name of the publisher of the
++	Modified Version, as the publisher.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	D. Preserve all the copyright notices of the Document.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	E. Add an appropriate copyright notice for your
++	modifications adjacent to the other copyright notices.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	F. Include, immediately after the copyright notices, a
++	license notice giving the public permission to use the
++	Modified Version under the terms of this License, in the form
++	shown in the Addendum below.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	G. Preserve in that license notice the full lists of
++	Invariant Sections and required Cover Texts given in the
++	Document's license notice.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	H. Include an unaltered copy of this License.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	I. Preserve the section entitled "History", and its title,
++	and add to it an item stating at least the title, year, new
++	authors, and publisher of the Modified Version as given on the
++	Title Page. If there is no section entitled "History" in the
++	Document, create one stating the title, year, authors, and
++	publisher of the Document as given on its Title Page, then add
++	an item describing the Modified Version as stated in the
++	previous sentence.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++        J. Preserve the network location, if any, given in the
++        Document for public access to a Transparent copy of the
++        Document, and likewise the network locations given in the
++        Document for previous versions it was based on. These may be
++        placed in the "History" section. You may omit a network
++        location for a work that was published at least four years
++        before the Document itself, or if the original publisher of
++        the version it refers to gives permission.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++        K. In any section entitled "Acknowledgements" or
++        "Dedications", preserve the section's title, and preserve in
++        the section all the substance and tone of each of the
++        contributor acknowledgements and/or dedications given therein.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	L. Preserve all the Invariant Sections of the Document,
++	unaltered in their text and in their titles. Section numbers
++	or the equivalent are not considered part of the section
++	titles.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	M. Delete any section entitled "Endorsements". Such a
++	section may not be included in the Modified Version.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	N. Do not retitle any existing section as "Endorsements" or
++	to conflict in title with any Invariant Section.
++	</para>
++       </listitem>
++      </itemizedlist>
++     </para>
++
++     <para>
++       If the Modified Version includes new front-matter sections or
++       appendices that qualify as Secondary Sections and contain no
++       material copied from the Document, you may at your option
++       designate some or all of these sections as invariant. To do
++       this, add their titles to the list of Invariant Sections in the
++       Modified Version's license notice. These titles must be
++       distinct from any other section titles.
++     </para>
++
++     <para>
++       You may add a section entitled "Endorsements", provided it
++       contains nothing but endorsements of your Modified Version by
++       various parties--for example, statements of peer review or that
++       the text has been approved by an organization as the
++       authoritative definition of a standard.
++     </para>
++
++     <para>
++       You may add a passage of up to five words as a Front-Cover
++       Text, and a passage of up to 25 words as a Back-Cover Text, to
++       the end of the list of Cover Texts in the Modified
++       Version. Only one passage of Front-Cover Text and one of
++       Back-Cover Text may be added by (or through arrangements made
++       by) any one entity. If the Document already includes a cover
++       text for the same cover, previously added by you or by
++       arrangement made by the same entity you are acting on behalf
++       of, you may not add another; but you may replace the old one,
++       on explicit permission from the previous publisher that added
++       the old one.
++     </para>
++
++     <para>
++       The author(s) and publisher(s) of the Document do not by this
++       License give permission to use their names for publicity for or
++       to assert or imply endorsement of any Modified Version.
++     </para>
++
++     </sect1>
++     <sect1><title>5. COMBINING DOCUMENTS</title>
++
++     <para>
++       You may combine the Document with other documents released
++       under this License, under the terms defined in section 4 above
++       for modified versions, provided that you include in the
++       combination all of the Invariant Sections of all of the
++       original documents, unmodified, and list them all as Invariant
++       Sections of your combined work in its license notice.
++     </para>
++
++     <para>
++       The combined work need only contain one copy of this License,
++       and multiple identical Invariant Sections may be replaced with
++       a single copy. If there are multiple Invariant Sections with
++       the same name but different contents, make the title of each
++       such section unique by adding at the end of it, in parentheses,
++       the name of the original author or publisher of that section if
++       known, or else a unique number. Make the same adjustment to the
++       section titles in the list of Invariant Sections in the license
++       notice of the combined work.
++     </para>
++
++     <para>
++       In the combination, you must combine any sections entitled
++       "History" in the various original documents, forming one
++       section entitled "History"; likewise combine any sections
++       entitled "Acknowledgements", and any sections entitled
++       "Dedications". You must delete all sections entitled
++       "Endorsements."
++     </para>
++
++     </sect1>
++     <sect1><title>6. COLLECTIONS OF DOCUMENTS</title>
++
++     <para>
++       You may make a collection consisting of the Document and other
++       documents released under this License, and replace the
++       individual copies of this License in the various documents with
++       a single copy that is included in the collection, provided that
++       you follow the rules of this License for verbatim copying of
++       each of the documents in all other respects.
++     </para>
++
++     <para>
++       You may extract a single document from such a collection, and
++       distribute it individually under this License, provided you
++       insert a copy of this License into the extracted document, and
++       follow this License in all other respects regarding verbatim
++       copying of that document.
++     </para>
++
++     </sect1>
++     <sect1><title>7. AGGREGATION WITH INDEPENDENT WORKS</title>
++
++     <para>
++       A compilation of the Document or its derivatives with other
++       separate and independent documents or works, in or on a volume
++       of a storage or distribution medium, does not as a whole count
++       as a Modified Version of the Document, provided no compilation
++       copyright is claimed for the compilation. Such a compilation is
++       called an "aggregate", and this License does not apply to the
++       other self-contained works thus compiled with the Document, on
++       account of their being thus compiled, if they are not
++       themselves derivative works of the Document.
++     </para>
++
++     <para>
++       If the Cover Text requirement of section 3 is applicable to
++       these copies of the Document, then if the Document is less than
++       one quarter of the entire aggregate, the Document's Cover Texts
++       may be placed on covers that surround only the Document within
++       the aggregate. Otherwise they must appear on covers around the
++       whole aggregate.
++     </para>
++
++     </sect1>
++     <sect1><title>8. TRANSLATION</title>
++
++     <para>
++       Translation is considered a kind of modification, so you may
++       distribute translations of the Document under the terms of
++       section 4. Replacing Invariant Sections with translations
++       requires special permission from their copyright holders, but
++       you may include translations of some or all Invariant Sections
++       in addition to the original versions of these Invariant
++       Sections. You may include a translation of this License
++       provided that you also include the original English version of
++       this License. In case of a disagreement between the translation
++       and the original English version of this License, the original
++       English version will prevail.
++     </para>
++
++     </sect1>
++     <sect1><title>9. TERMINATION</title>
++
++     <para>
++       You may not copy, modify, sublicense, or distribute the
++       Document except as expressly provided for under this
++       License. Any other attempt to copy, modify, sublicense or
++       distribute the Document is void, and will automatically
++       terminate your rights under this License. However, parties who
++       have received copies, or rights, from you under this License
++       will not have their licenses terminated so long as such parties
++       remain in full compliance.
++     </para>
++
++     </sect1>
++     <sect1><title>10. FUTURE REVISIONS OF THIS LICENSE</title>
++
++     <para>
++       The Free Software Foundation may publish new, revised versions
++       of the GNU Free Documentation License from time to time. Such
++       new versions will be similar in spirit to the present version,
++       but may differ in detail to address new problems or
++       concerns. See http://www.gnu.org/copyleft/.
++     </para>
++
++     <para>
++       Each version of the License is given a distinguishing version
++       number. If the Document specifies that a particular numbered
++       version of this License "or any later version" applies to it,
++       you have the option of following the terms and conditions
++       either of that specified version or of any later version that
++       has been published (not as a draft) by the Free Software
++       Foundation. If the Document does not specify a version number
++       of this License, you may choose any version ever published (not
++       as a draft) by the Free Software Foundation.
++     </para>
++
++     </sect1>
++  </appendix>
++</book>
+diff -uprN linux-2.4.25.old/include/linux/icmpv6.h linux-2.4.25/include/linux/icmpv6.h
+--- linux-2.4.25.old/include/linux/icmpv6.h	2003-08-25 12:44:44.000000000 +0100
++++ linux-2.4.25/include/linux/icmpv6.h	2004-06-26 11:29:29.000000000 +0100
+@@ -40,14 +40,16 @@ struct icmp6hdr {
+                 struct icmpv6_nd_ra {
+ 			__u8		hop_limit;
+ #if defined(__LITTLE_ENDIAN_BITFIELD)
+-			__u8		reserved:6,
++			__u8		reserved:5,
++				        home_agent:1,
+ 					other:1,
+ 					managed:1;
+ 
+ #elif defined(__BIG_ENDIAN_BITFIELD)
+ 			__u8		managed:1,
+ 					other:1,
+-					reserved:6;
++				        home_agent:1,
++					reserved:5;
+ #else
+ #error	"Please fix <asm/byteorder.h>"
+ #endif
+@@ -70,6 +72,7 @@ struct icmp6hdr {
+ #define icmp6_addrconf_managed	icmp6_dataun.u_nd_ra.managed
+ #define icmp6_addrconf_other	icmp6_dataun.u_nd_ra.other
+ #define icmp6_rt_lifetime	icmp6_dataun.u_nd_ra.rt_lifetime
++#define icmp6_home_agent	icmp6_dataun.u_nd_ra.home_agent
+ };
+ 
+ 
+diff -uprN linux-2.4.25.old/include/linux/if_arp.h linux-2.4.25/include/linux/if_arp.h
+--- linux-2.4.25.old/include/linux/if_arp.h	2002-02-25 19:38:13.000000000 +0000
++++ linux-2.4.25/include/linux/if_arp.h	2004-06-26 11:29:29.000000000 +0100
+@@ -59,7 +59,7 @@
+ #define ARPHRD_RAWHDLC	518		/* Raw HDLC			*/
+ 
+ #define ARPHRD_TUNNEL	768		/* IPIP tunnel			*/
+-#define ARPHRD_TUNNEL6	769		/* IPIP6 tunnel			*/
++#define ARPHRD_TUNNEL6	769		/* IP6IP6 tunnel       		*/
+ #define ARPHRD_FRAD	770             /* Frame Relay Access Device    */
+ #define ARPHRD_SKIP	771		/* SKIP vif			*/
+ #define ARPHRD_LOOPBACK	772		/* Loopback device		*/
+diff -uprN linux-2.4.25.old/include/linux/in6.h linux-2.4.25/include/linux/in6.h
+--- linux-2.4.25.old/include/linux/in6.h	2003-06-13 15:51:38.000000000 +0100
++++ linux-2.4.25/include/linux/in6.h	2004-06-26 11:29:29.000000000 +0100
+@@ -142,6 +142,11 @@ struct in6_flowlabel_req
+ #define IPV6_TLV_JUMBO		194
+ 
+ /*
++ *	Mobile IPv6 TLV options.
++ */
++#define MIPV6_TLV_HOMEADDR	201
++
++/*
+  *	IPV6 socket options
+  */
+ 
+diff -uprN linux-2.4.25.old/include/linux/ipv6.h linux-2.4.25/include/linux/ipv6.h
+--- linux-2.4.25.old/include/linux/ipv6.h	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/include/linux/ipv6.h	2004-06-26 11:29:29.000000000 +0100
+@@ -29,6 +29,7 @@ struct in6_ifreq {
+ 
+ #define IPV6_SRCRT_STRICT	0x01	/* this hop must be a neighbor	*/
+ #define IPV6_SRCRT_TYPE_0	0	/* IPv6 type 0 Routing Header	*/
++#define IPV6_SRCRT_TYPE_2	2	/*      type 2 for Mobile IPv6  */
+ 
+ /*
+  *	routing header
+@@ -71,6 +72,19 @@ struct rt0_hdr {
+ 	struct in6_addr		addr[0];
+ 
+ #define rt0_type		rt_hdr.type
++
++};
++
++/*
++ *	routing header type 2
++ */
++
++struct rt2_hdr {
++	struct ipv6_rt_hdr	rt_hdr;
++	__u32			reserved;
++	struct in6_addr		addr;
++
++#define rt2_type		rt_hdr.type;
+ };
+ 
+ /*
+@@ -156,12 +170,16 @@ enum {
+ struct inet6_skb_parm
+ {
+ 	int			iif;
++	__u8			mipv6_flags;
+ 	__u16			ra;
+ 	__u16			hop;
+ 	__u16			auth;
+ 	__u16			dst0;
+ 	__u16			srcrt;
++	__u16			srcrt2;
++	__u16			hao;
+ 	__u16			dst1;
++	struct in6_addr		hoa;
+ };
+ 
+ #endif
+diff -uprN linux-2.4.25.old/include/linux/ipv6_route.h linux-2.4.25/include/linux/ipv6_route.h
+--- linux-2.4.25.old/include/linux/ipv6_route.h	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/include/linux/ipv6_route.h	2004-06-26 11:29:29.000000000 +0100
+@@ -33,6 +33,7 @@ enum
+ #define RTF_CACHE	0x01000000	/* cache entry			*/
+ #define RTF_FLOW	0x02000000	/* flow significant route	*/
+ #define RTF_POLICY	0x04000000	/* policy route			*/
++#define RTF_MOBILENODE  0x10000000      /* for routing to Mobile Node   */
+ 
+ #define RTF_LOCAL	0x80000000
+ 
+diff -uprN linux-2.4.25.old/include/linux/ipv6_tunnel.h linux-2.4.25/include/linux/ipv6_tunnel.h
+--- linux-2.4.25.old/include/linux/ipv6_tunnel.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/include/linux/ipv6_tunnel.h	2004-06-26 11:29:29.000000000 +0100
+@@ -0,0 +1,34 @@
++/*
++ * $Id$
++ */
++
++#ifndef _IPV6_TUNNEL_H
++#define _IPV6_TUNNEL_H
++
++#define IPV6_TLV_TNL_ENCAP_LIMIT 4
++#define IPV6_DEFAULT_TNL_ENCAP_LIMIT 4
++
++/* don't add encapsulation limit if one isn't present in inner packet */
++#define IP6_TNL_F_IGN_ENCAP_LIMIT 0x1
++/* copy the traffic class field from the inner packet */
++#define IP6_TNL_F_USE_ORIG_TCLASS 0x2
++/* copy the flowlabel from the inner packet */
++#define IP6_TNL_F_USE_ORIG_FLOWLABEL 0x4
++/* created and maintained from within the kernel */
++#define IP6_TNL_F_KERNEL_DEV 0x8
++/* being used for Mobile IPv6 */
++#define IP6_TNL_F_MIP6_DEV 0x10
++
++struct ip6_tnl_parm {
++	char name[IFNAMSIZ];	/* name of tunnel device */
++	int link;		/* ifindex of underlying L2 interface */
++	__u8 proto;		/* tunnel protocol */
++	__u8 encap_limit;	/* encapsulation limit for tunnel */
++	__u8 hop_limit;		/* hop limit for tunnel */
++	__u32 flowinfo;		/* traffic class and flowlabel for tunnel */
++	__u32 flags;		/* tunnel flags */
++	struct in6_addr laddr;	/* local tunnel end-point address */
++	struct in6_addr raddr;	/* remote tunnel end-point address */
++};
++
++#endif
+diff -uprN linux-2.4.25.old/include/linux/rtnetlink.h linux-2.4.25/include/linux/rtnetlink.h
+--- linux-2.4.25.old/include/linux/rtnetlink.h	2004-02-18 13:36:32.000000000 +0000
++++ linux-2.4.25/include/linux/rtnetlink.h	2004-06-26 11:29:29.000000000 +0100
+@@ -309,15 +309,17 @@ enum
+ 	IFA_LABEL,
+ 	IFA_BROADCAST,
+ 	IFA_ANYCAST,
+-	IFA_CACHEINFO
++	IFA_CACHEINFO,
++	IFA_HOMEAGENT
+ };
+ 
+-#define IFA_MAX IFA_CACHEINFO
++#define IFA_MAX IFA_HOMEAGENT
+ 
+ /* ifa_flags */
+ 
+ #define IFA_F_SECONDARY		0x01
+ 
++#define IFA_F_HOMEADDR		0x10
+ #define IFA_F_DEPRECATED	0x20
+ #define IFA_F_TENTATIVE		0x40
+ #define IFA_F_PERMANENT		0x80
+diff -uprN linux-2.4.25.old/include/linux/skbuff.h linux-2.4.25/include/linux/skbuff.h
+--- linux-2.4.25.old/include/linux/skbuff.h	2003-08-25 12:44:44.000000000 +0100
++++ linux-2.4.25/include/linux/skbuff.h	2004-06-26 11:29:29.000000000 +0100
+@@ -177,7 +177,7 @@ struct sk_buff {
+ 	 * want to keep them across layers you have to do a skb_clone()
+ 	 * first. This is owned by whoever has the skb queued ATM.
+ 	 */ 
+-	char		cb[48];	 
++	char		cb[64];	 
+ 
+ 	unsigned int 	len;			/* Length of actual data			*/
+  	unsigned int 	data_len;
+diff -uprN linux-2.4.25.old/include/linux/sysctl.h linux-2.4.25/include/linux/sysctl.h
+--- linux-2.4.25.old/include/linux/sysctl.h	2004-02-18 13:36:32.000000000 +0000
++++ linux-2.4.25/include/linux/sysctl.h	2004-06-26 11:29:29.000000000 +0100
+@@ -387,7 +387,24 @@ enum {
+ 	NET_IPV6_NEIGH=17,
+ 	NET_IPV6_ROUTE=18,
+ 	NET_IPV6_ICMP=19,
+-	NET_IPV6_BINDV6ONLY=20
++	NET_IPV6_BINDV6ONLY=20,
++	NET_IPV6_MOBILITY=26
++};
++
++/* /proc/sys/net/ipv6/mobility */
++enum {
++	NET_IPV6_MOBILITY_DEBUG=1,
++	NET_IPV6_MOBILITY_TUNNEL_SITELOCAL=2,
++	NET_IPV6_MOBILITY_ROUTER_SOLICITATION_MAX_SENDTIME=3,
++	NET_IPV6_MOBILITY_ROUTER_REACH=4,
++	NET_IPV6_MOBILITY_MDETECT_MECHANISM=5,
++	NET_IPV6_MOBILITY_RETROUT=6,
++	NET_IPV6_MOBILITY_MAX_TNLS=7,
++	NET_IPV6_MOBILITY_MIN_TNLS=8,
++	NET_IPV6_MOBILITY_BINDING_REFRESH=9,
++	NET_IPV6_MOBILITY_BU_F_LLADDR=10,
++	NET_IPV6_MOBILITY_BU_F_KEYMGM=11,
++	NET_IPV6_MOBILITY_BU_F_CN_ACK=12
+ };
+ 
+ enum {
+diff -uprN linux-2.4.25.old/include/net/addrconf.h linux-2.4.25/include/net/addrconf.h
+--- linux-2.4.25.old/include/net/addrconf.h	2003-08-25 12:44:44.000000000 +0100
++++ linux-2.4.25/include/net/addrconf.h	2004-06-26 11:29:29.000000000 +0100
+@@ -16,9 +16,11 @@ struct prefix_info {
+ #if defined(__BIG_ENDIAN_BITFIELD)
+ 	__u8			onlink : 1,
+ 			 	autoconf : 1,
+-				reserved : 6;
++				router_address : 1,
++				reserved : 5;
+ #elif defined(__LITTLE_ENDIAN_BITFIELD)
+-	__u8			reserved : 6,
++	__u8			reserved : 5,
++				router_address : 1,
+ 				autoconf : 1,
+ 				onlink : 1;
+ #else
+@@ -55,6 +57,7 @@ extern int			ipv6_chk_addr(struct in6_ad
+ 					      struct net_device *dev);
+ extern struct inet6_ifaddr *	ipv6_get_ifaddr(struct in6_addr *addr,
+ 						struct net_device *dev);
++extern void			ipv6_del_addr(struct inet6_ifaddr *ifp);
+ extern int			ipv6_get_saddr(struct dst_entry *dst, 
+ 					       struct in6_addr *daddr,
+ 					       struct in6_addr *saddr);
+@@ -85,7 +88,9 @@ extern void ipv6_mc_up(struct inet6_dev 
+ extern void ipv6_mc_down(struct inet6_dev *idev);
+ extern void ipv6_mc_init_dev(struct inet6_dev *idev);
+ extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
++extern void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
+ extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
++extern void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+ 
+ extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
+ 		struct in6_addr *src_addr);
+@@ -116,6 +121,9 @@ extern int			ipv6_chk_acast_addr(struct 
+ extern int register_inet6addr_notifier(struct notifier_block *nb);
+ extern int unregister_inet6addr_notifier(struct notifier_block *nb);
+ 
++extern int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
++extern int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev);
++
+ static inline struct inet6_dev *
+ __in6_dev_get(struct net_device *dev)
+ {
+diff -uprN linux-2.4.25.old/include/net/ip6_route.h linux-2.4.25/include/net/ip6_route.h
+--- linux-2.4.25.old/include/net/ip6_route.h	2003-06-13 15:51:39.000000000 +0100
++++ linux-2.4.25/include/net/ip6_route.h	2004-06-26 11:29:29.000000000 +0100
+@@ -2,6 +2,7 @@
+ #define _NET_IP6_ROUTE_H
+ 
+ #define IP6_RT_PRIO_FW		16
++#define IP6_RT_PRIO_MIPV6      	64
+ #define IP6_RT_PRIO_USER	1024
+ #define IP6_RT_PRIO_ADDRCONF	256
+ #define IP6_RT_PRIO_KERN	512
+@@ -40,6 +41,9 @@ extern int			ipv6_route_ioctl(unsigned i
+ 
+ extern int			ip6_route_add(struct in6_rtmsg *rtmsg,
+ 					      struct nlmsghdr *);
++
++extern int			ip6_route_del(struct in6_rtmsg *rtmsg,
++					      struct nlmsghdr *);
+ extern int			ip6_del_rt(struct rt6_info *,
+ 					   struct nlmsghdr *);
+ 
+@@ -99,7 +103,8 @@ extern rwlock_t rt6_lock;
+  */
+ 
+ static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
+-				     struct in6_addr *daddr)
++				 struct in6_addr *daddr, 
++				 struct in6_addr *saddr)
+ {
+ 	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
+ 	struct rt6_info *rt = (struct rt6_info *) dst;
+@@ -107,6 +112,9 @@ static inline void ip6_dst_store(struct 
+ 	write_lock(&sk->dst_lock);
+ 	__sk_dst_set(sk, dst);
+ 	np->daddr_cache = daddr;
++#ifdef CONFIG_IPV6_SUBTREES
++	np->saddr_cache = saddr;
++#endif
+ 	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
+ 	write_unlock(&sk->dst_lock);
+ }
+diff -uprN linux-2.4.25.old/include/net/ipv6.h linux-2.4.25/include/net/ipv6.h
+--- linux-2.4.25.old/include/net/ipv6.h	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/include/net/ipv6.h	2004-06-26 11:29:29.000000000 +0100
+@@ -37,6 +37,7 @@
+ #define NEXTHDR_ICMP		58	/* ICMP for IPv6. */
+ #define NEXTHDR_NONE		59	/* No next header */
+ #define NEXTHDR_DEST		60	/* Destination options header. */
++#define NEXTHDR_MH		135	/* Mobility header, RFC 3775 */
+ 
+ #define NEXTHDR_MAX		255
+ 
+@@ -145,9 +146,12 @@ struct ipv6_txoptions
+ 	__u16			opt_flen;	/* after fragment hdr */
+ 	__u16			opt_nflen;	/* before fragment hdr */
+ 
++	__u8			mipv6_flags;	/* flags set by MIPv6 */
++
+ 	struct ipv6_opt_hdr	*hopopt;
+ 	struct ipv6_opt_hdr	*dst0opt;
+-	struct ipv6_rt_hdr	*srcrt;	/* Routing Header */
++	struct ipv6_rt_hdr	*srcrt;	/* Routing Header Type 0 */
++	struct ipv6_rt_hdr	*srcrt2; /* Routing Header Type 2 */
+ 	struct ipv6_opt_hdr	*auth;
+ 	struct ipv6_opt_hdr	*dst1opt;
+ 
+@@ -256,6 +260,38 @@ static inline int ipv6_addr_any(const st
+ 		 a->s6_addr32[2] | a->s6_addr32[3] ) == 0); 
+ }
+ 
++static inline void ipv6_addr_prefix(struct in6_addr *pfx,
++				    const struct in6_addr *addr, int plen)
++{
++	/* caller must guarantee 0 <= plen <= 128 */
++	int o = plen >> 3,
++	    b = plen & 0x7;
++
++	memcpy(pfx->s6_addr, addr, o);
++	if (b != 0) {
++		pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
++		o++;
++	}
++	if (o < 16)
++		memset(pfx->s6_addr + o, 0, 16 - o);
++}
++
++static inline int ipv6_prefix_cmp(const struct in6_addr *p1,
++				  const struct in6_addr *p2, int plen)
++{
++	int b = plen&0x7;
++	int o = plen>>3;
++	int res = 0;
++
++	if (o > 0) 
++		res = memcmp(&p1->s6_addr[0], &p2->s6_addr[0], o);
++	if (res == 0 && b > 0) {
++		__u8 m = (0xff00 >> b) & 0xff;
++		res = (p1->s6_addr[o] & m) - (p2->s6_addr[o] & m);  
++	}
++	return res;
++}
++
+ /*
+  *	Prototypes exported by ipv6
+  */
+diff -uprN linux-2.4.25.old/include/net/ipv6_tunnel.h linux-2.4.25/include/net/ipv6_tunnel.h
+--- linux-2.4.25.old/include/net/ipv6_tunnel.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/include/net/ipv6_tunnel.h	2004-06-26 11:29:29.000000000 +0100
+@@ -0,0 +1,92 @@
++/*
++ * $Id$
++ */
++
++#ifndef _NET_IPV6_TUNNEL_H
++#define _NET_IPV6_TUNNEL_H
++
++#include <linux/ipv6.h>
++#include <linux/netdevice.h>
++#include <linux/ipv6_tunnel.h>
++#include <linux/skbuff.h>
++#include <asm/atomic.h>
++
++/* capable of sending packets */
++#define IP6_TNL_F_CAP_XMIT 0x10000
++/* capable of receiving packets */
++#define IP6_TNL_F_CAP_RCV 0x20000
++
++#define IP6_TNL_MAX 128
++
++/* IPv6 tunnel */
++
++struct ip6_tnl {
++	struct ip6_tnl *next;	/* next tunnel in list */
++	struct net_device *dev;	/* virtual device associated with tunnel */
++	struct net_device_stats stat;	/* statistics for tunnel device */
++	int recursion;		/* depth of hard_start_xmit recursion */
++	struct ip6_tnl_parm parms;	/* tunnel configuration paramters */
++	struct flowi fl;	/* flowi template for xmit */
++	atomic_t refcnt;        /* nr of identical tunnels used by kernel */
++	struct socket *sock;
++};
++
++#define IP6_TNL_PRE_ENCAP 0
++#define IP6_TNL_PRE_DECAP 1
++#define IP6_TNL_MAXHOOKS 2
++
++#define IP6_TNL_DROP 0
++#define IP6_TNL_ACCEPT 1
++
++typedef int ip6_tnl_hookfn(struct ip6_tnl *t, struct sk_buff *skb);
++
++struct ip6_tnl_hook_ops {
++	struct list_head list;
++	unsigned int hooknum;
++	int priority;
++	ip6_tnl_hookfn *hook;
++};
++
++enum ip6_tnl_hook_priorities {
++	IP6_TNL_PRI_FIRST = INT_MIN,
++	IP6_TNL_PRI_LAST = INT_MAX
++};
++
++/* Tunnel encapsulation limit destination sub-option */
++
++struct ipv6_tlv_tnl_enc_lim {
++	__u8 type;		/* type-code for option         */
++	__u8 length;		/* option length                */
++	__u8 encap_limit;	/* tunnel encapsulation limit   */
++} __attribute__ ((packed));
++
++#ifdef __KERNEL__
++extern int ip6ip6_tnl_create(struct ip6_tnl_parm *p, struct ip6_tnl **pt);
++
++extern struct ip6_tnl *ip6ip6_tnl_lookup(struct in6_addr *remote,
++					 struct in6_addr *local);
++
++void ip6ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p);
++
++extern int ip6ip6_kernel_tnl_add(struct ip6_tnl_parm *p);
++
++extern int ip6ip6_kernel_tnl_del(struct ip6_tnl *t);
++
++extern unsigned int ip6ip6_tnl_inc_max_kdev_count(unsigned int n);
++
++extern unsigned int ip6ip6_tnl_dec_max_kdev_count(unsigned int n);
++
++extern unsigned int ip6ip6_tnl_inc_min_kdev_count(unsigned int n);
++
++extern unsigned int ip6ip6_tnl_dec_min_kdev_count(unsigned int n);
++
++extern void ip6ip6_tnl_register_hook(struct ip6_tnl_hook_ops *reg);
++
++extern void ip6ip6_tnl_unregister_hook(struct ip6_tnl_hook_ops *reg);
++
++#ifdef CONFIG_IPV6_TUNNEL
++extern int __init ip6_tunnel_init(void);
++extern void ip6_tunnel_cleanup(void);
++#endif
++#endif
++#endif
+diff -uprN linux-2.4.25.old/include/net/mipglue.h linux-2.4.25/include/net/mipglue.h
+--- linux-2.4.25.old/include/net/mipglue.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/include/net/mipglue.h	2004-06-26 11:29:29.000000000 +0100
+@@ -0,0 +1,266 @@
++/*
++ *	Glue for Mobility support integration to IPv6
++ *
++ *	Authors:
++ *	Antti Tuominen		<ajtuomin@cc.hut.fi>	
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#ifndef _NET_MIPGLUE_H
++#define _NET_MIPGLUE_H
++
++#ifndef USE_IPV6_MOBILITY
++#if defined(CONFIG_IPV6_MOBILITY) || defined(CONFIG_IPV6_MOBILITY_MODULE)
++#define USE_IPV6_MOBILITY
++#endif
++#endif
++
++/* symbols to indicate whether destination options received should take
++ * effect or not (see exthdrs.c, procrcv.c)
++ */
++#define MIPV6_DSTOPTS_ACCEPT 1
++#define MIPV6_DSTOPTS_DISCARD 0
++
++#define MIPV6_IGN_RTR 0
++#define MIPV6_ADD_RTR 1
++#define MIPV6_CHG_RTR 2
++
++/* MIPV6: Approximate maximum for mobile IPv6 options and headers */
++#define MIPV6_HEADERS 48
++
++#ifdef __KERNEL__
++#include <net/mipv6.h>
++#include <linux/slab.h>
++#include <net/ipv6.h>
++
++struct sk_buff;
++struct ndisc_options;
++struct sock;
++struct ipv6_txoptions;
++struct flowi;
++struct dst_entry;
++struct in6_addr;
++struct inet6_ifaddr;
++
++#ifdef USE_IPV6_MOBILITY
++
++/* calls a procedure from mipv6-module */
++#define MIPV6_CALLPROC(X) if(mipv6_functions.X) mipv6_functions.X
++
++/* calls a function from mipv6-module, default-value if function not defined
++ */
++#define MIPV6_CALLFUNC(X,Y) (!mipv6_functions.X)?(Y):mipv6_functions.X
++
++/* sets a handler-function to process a call */
++#define MIPV6_SETCALL(X,Y) if(mipv6_functions.X) printk("mipv6: Warning, function assigned twice!\n"); \
++                           mipv6_functions.X = Y
++#define MIPV6_RESETCALL(X) mipv6_functions.X = NULL
++
++/* pointers to mipv6 callable functions */
++struct mipv6_callable_functions {
++	void (*mipv6_initialize_dstopt_rcv) (struct sk_buff *skb);
++	int (*mipv6_finalize_dstopt_rcv) (int process);
++	int (*mipv6_handle_homeaddr) (struct sk_buff *skb, int optoff);
++	int (*mipv6_ra_rcv) (struct sk_buff *skb,
++			     struct ndisc_options *ndopts);
++	void (*mipv6_icmp_rcv) (struct sk_buff *skb);
++	struct ipv6_txoptions * (*mipv6_modify_txoptions) (
++		struct sock *sk,
++		struct sk_buff *skb, 
++		struct ipv6_txoptions *opt,
++		struct flowi *fl,
++		struct dst_entry **dst);
++	void (*mipv6_set_home) (int ifindex, struct in6_addr *homeaddr,
++				int plen, struct in6_addr *homeagent, 
++				int plen2);
++	void (*mipv6_get_home_address) (struct in6_addr *home_addr);
++	void (*mipv6_get_care_of_address)(struct in6_addr *homeaddr, 
++					  struct in6_addr *coa);
++	int (*mipv6_is_home_addr)(struct in6_addr *addr);
++	void (*mipv6_change_router)(void);
++	void (*mipv6_check_dad)(struct in6_addr *home_addr);      
++	void (*mipv6_icmp_swap_addrs)(struct sk_buff *skb);
++	int (*mipv6_forward)(struct sk_buff *skb);
++	int (*mipv6_mn_ha_probe)(struct inet6_ifaddr *ifp, u8 *lladdr);
++};
++
++extern struct mipv6_callable_functions mipv6_functions;
++
++extern void mipv6_invalidate_calls(void);
++
++extern int mipv6_handle_dstopt(struct sk_buff *skb, int optoff);
++
++static inline int
++ndisc_mip_mn_ha_probe(struct inet6_ifaddr *ifp, u8 *lladdr)
++{
++	return MIPV6_CALLFUNC(mipv6_mn_ha_probe, 0)(ifp, lladdr);
++}
++
++/* Must only be called for HA, no checks here */
++static inline int ip6_mipv6_forward(struct sk_buff *skb)
++{
++	return MIPV6_CALLFUNC(mipv6_forward, 0)(skb);
++}
++
++/* 
++ * Avoid adding new default routers if the old one is still in use 
++ */
++
++static inline int ndisc_mipv6_ra_rcv(struct sk_buff *skb,
++				     struct ndisc_options *ndopts)
++{
++	return MIPV6_CALLFUNC(mipv6_ra_rcv, MIPV6_ADD_RTR)(skb, ndopts);
++}
++
++static inline int ipv6_chk_mip_home_addr(struct in6_addr *addr)
++{
++	return MIPV6_CALLFUNC(mipv6_is_home_addr, 0)(addr);
++}
++
++static inline void ndisc_mipv6_change_router(int change_rtr)
++{
++	if (change_rtr == MIPV6_CHG_RTR)
++		MIPV6_CALLPROC(mipv6_change_router)();
++}
++
++static inline void ndisc_check_mipv6_dad(struct in6_addr *target)
++{
++	MIPV6_CALLPROC(mipv6_check_dad)(target);
++}
++
++static inline void icmpv6_swap_mipv6_addrs(struct sk_buff *skb)
++{
++	MIPV6_CALLPROC(mipv6_icmp_swap_addrs)(skb);
++}
++
++static inline void mipv6_icmp_rcv(struct sk_buff *skb)
++{
++	MIPV6_CALLPROC(mipv6_icmp_rcv)(skb);
++}
++
++static inline int tcp_v6_get_mipv6_header_len(void)
++{
++	return MIPV6_HEADERS;
++}
++
++static inline struct in6_addr *
++mipv6_get_fake_hdr_daddr(struct in6_addr *hdaddr, struct in6_addr *daddr)
++{
++	return daddr;
++}
++
++static inline void 
++addrconf_set_mipv6_mn_home(int ifindex, struct in6_addr *homeaddr, int plen,
++			   struct in6_addr *homeagent, int plen2)
++{
++	MIPV6_CALLPROC(mipv6_set_home)(ifindex, homeaddr, plen, homeagent, plen2);
++}
++
++static inline void addrconf_get_mipv6_home_address(struct in6_addr *saddr)
++{
++	MIPV6_CALLPROC(mipv6_get_home_address)(saddr);
++}
++
++static inline struct ipv6_txoptions *
++ip6_add_mipv6_txoptions(struct sock *sk, struct sk_buff *skb, 
++			struct ipv6_txoptions *opt, struct flowi *fl,
++			struct dst_entry **dst)
++{
++	return MIPV6_CALLFUNC(mipv6_modify_txoptions, opt)(sk, skb, opt, fl, dst); 
++
++}
++
++static inline void
++ip6_mark_mipv6_packet(struct ipv6_txoptions *txopt, struct sk_buff *skb)
++{
++	struct inet6_skb_parm *opt;
++	if (txopt) {
++		opt = (struct inet6_skb_parm *)skb->cb;
++		opt->mipv6_flags = txopt->mipv6_flags;
++	}
++}
++
++static inline void 
++ip6_free_mipv6_txoptions(struct ipv6_txoptions *opt,
++			 struct ipv6_txoptions *orig_opt) 
++{
++	if (opt && opt != orig_opt)
++		kfree(opt);
++}
++
++#else /* USE_IPV6_MOBILITY */
++
++#define mipv6_handle_dstopt ip6_tlvopt_unknown
++
++static inline int
++ndisc_mip_mn_ha_probe(struct inet6_ifaddr *ifp, u8 *lladdr)
++{
++	return 0;
++}
++
++static inline int ip6_mipv6_forward(struct sk_buff *skb)
++{
++	return 0;
++}
++
++static inline int ndisc_mipv6_ra_rcv(struct sk_buff *skb,
++				     struct ndisc_options *ndopts)
++{
++	return MIPV6_ADD_RTR;
++}
++
++static inline int ipv6_chk_mip_home_addr(struct in6_addr *addr)
++{
++	return 0;
++}
++
++static inline void ndisc_mipv6_change_router(int change_rtr) {}
++
++static inline void ndisc_check_mipv6_dad(struct in6_addr *target) {}
++
++static inline void icmpv6_swap_mipv6_addrs(struct sk_buff *skb) {}
++
++static inline void mipv6_icmp_rcv(struct sk_buff *skb) {}
++
++static inline int tcp_v6_get_mipv6_header_len(void)
++{
++	return 0;
++}
++
++static inline struct in6_addr *
++mipv6_get_fake_hdr_daddr(struct in6_addr *hdaddr, struct in6_addr *daddr)
++{
++	return hdaddr;
++}
++
++static inline void 
++addrconf_set_mipv6_mn_home(int ifindex, struct in6_addr *homeaddr, int plen,
++			   struct in6_addr *homeagent, int plen2) {}
++
++static inline void addrconf_get_mipv6_home_address(struct in6_addr *saddr) {}
++
++static inline struct ipv6_txoptions *
++ip6_add_mipv6_txoptions(struct sock *sk, struct sk_buff *skb,
++			struct ipv6_txoptions *opt, struct flowi *fl,
++			struct dst_entry **dst)
++{
++	return opt;
++}
++
++static inline void
++ip6_mark_mipv6_packet(struct ipv6_txoptions *txopt, struct sk_buff *skb) {}
++
++static inline void 
++ip6_free_mipv6_txoptions(struct ipv6_txoptions *opt, 
++			 struct ipv6_txoptions *orig_opt) {}
++
++#endif /* USE_IPV6_MOBILITY */
++#endif /* __KERNEL__ */
++#endif /* _NET_MIPGLUE_H */
+diff -uprN linux-2.4.25.old/include/net/mipv6.h linux-2.4.25/include/net/mipv6.h
+--- linux-2.4.25.old/include/net/mipv6.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/include/net/mipv6.h	2004-06-26 11:29:29.000000000 +0100
+@@ -0,0 +1,258 @@
++/*
++ *	Mobile IPv6 header-file
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#ifndef _NET_MIPV6_H
++#define _NET_MIPV6_H
++
++#include <linux/types.h>
++#include <asm/byteorder.h>
++#include <linux/in6.h>
++
++/*
++ *
++ * Mobile IPv6 Protocol constants
++ *
++ */
++#define DHAAD_RETRIES			4	/* transmissions	*/
++#define INITIAL_BINDACK_TIMEOUT		1	/* seconds 		*/
++#define INITIAL_DHAAD_TIMEOUT		3	/* seconds		*/
++#define INITIAL_SOLICIT_TIMER		3	/* seconds		*/
++#define MAX_BINDACK_TIMEOUT		32 	/* seconds		*/
++#define MAX_NONCE_LIFE			240	/* seconds		*/
++#define MAX_TOKEN_LIFE			210	/* seconds		*/
++#define MAX_RR_BINDING_LIFE		420	/* seconds		*/
++#define MAX_UPDATE_RATE			3	/* 1/s (min delay=1s) 	*/
++#define PREFIX_ADV_RETRIES		3	/* transmissions	*/
++#define PREFIX_ADV_TIMEOUT		3	/* seconds		*/
++
++#define MAX_FAST_UPDATES		5 	/* transmissions	*/
++#define MAX_PFX_ADV_DELAY		1000	/* seconds		*/
++#define SLOW_UPDATE_RATE		10	/* 1/10s (max delay=10s)*/
++#define INITIAL_BINDACK_DAD_TIMEOUT	2	/* seconds		*/
++
++/*
++ *
++ * Mobile IPv6 (RFC 3775) Protocol configuration variable defaults
++ *
++ */
++#define DefHomeRtrAdvInterval		1000	/* seconds		*/
++#define DefMaxMobPfxAdvInterval		86400	/* seconds		*/
++#define DefMinDelayBetweenRAs		3	/* seconds (min 0.03)	*/
++#define DefMinMobPfxAdvInterval		600	/* seconds		*/
++#define DefInitialBindackTimeoutFirstReg	1.5 /* seconds		*/
++
++/* This is not actually specified in the draft, but is needed to avoid
++ * prefix solicitation storm when valid lifetime of a prefix is smaller
++ * than MAX_PFX_ADV_DELAY
++ */
++#define MIN_PFX_SOL_DELAY		5	/* seconds		*/
++
++/* Mobile IPv6 ICMP types		  */
++/*
++ * Official numbers from RFC 3775
++ */
++#define MIPV6_DHAAD_REQUEST		144
++#define MIPV6_DHAAD_REPLY		145
++#define MIPV6_PREFIX_SOLICIT		146
++#define MIPV6_PREFIX_ADV		147
++
++/* Binding update flag codes              */
++#define MIPV6_BU_F_ACK			0x80
++#define MIPV6_BU_F_HOME			0x40
++#define MIPV6_BU_F_LLADDR		0x20
++#define MIPV6_BU_F_KEYMGM		0x10
++
++/* Binding ackknowledgment flag codes */
++#define MIPV6_BA_F_KEYMGM		0x80
++
++/* Binding error status */
++#define MIPV6_BE_HAO_WO_BINDING		1
++#define MIPV6_BE_UNKNOWN_MH_TYPE	2
++
++/* Mobility Header */
++struct mipv6_mh
++{
++	__u8	payload;		/* Payload Protocol 		*/
++	__u8	length;			/* MH Length 			*/
++	__u8	type;			/* MH Type			*/
++	__u8	reserved;		/* Reserved			*/
++	__u16	checksum;		/* Checksum			*/
++	__u8	data[0];		/* Message specific data	*/
++} __attribute__ ((packed));
++
++/* Mobility Header type */
++#define IPPROTO_MOBILITY                135 /* RFC 3775*/                
++/* Mobility Header Message Types */
++
++#define MIPV6_MH_BRR			0
++#define MIPV6_MH_HOTI			1
++#define MIPV6_MH_COTI			2
++#define MIPV6_MH_HOT			3
++#define MIPV6_MH_COT			4
++#define MIPV6_MH_BU			5
++#define MIPV6_MH_BA			6
++#define MIPV6_MH_BE			7
++
++/*
++ * Status codes for Binding Acknowledgements
++ */
++#define SUCCESS				0
++#define REASON_UNSPECIFIED		128
++#define ADMINISTRATIVELY_PROHIBITED	129
++#define INSUFFICIENT_RESOURCES		130
++#define HOME_REGISTRATION_NOT_SUPPORTED	131
++#define NOT_HOME_SUBNET			132
++#define NOT_HA_FOR_MN			133
++#define DUPLICATE_ADDR_DETECT_FAIL	134
++#define SEQUENCE_NUMBER_OUT_OF_WINDOW	135
++#define EXPIRED_HOME_NONCE_INDEX	136
++#define EXPIRED_CAREOF_NONCE_INDEX	137
++#define EXPIRED_NONCES			138
++#define REG_TYPE_CHANGE_FORBIDDEN       139
++/*
++ * Values for mipv6_flags in struct inet6_skb_parm
++ */
++
++#define MIPV6_RCV_TUNNEL		0x1
++#define MIPV6_SND_HAO			0x2
++#define MIPV6_SND_BU                    0x4
++
++/*
++ * Mobility Header Message structures
++ */
++
++struct mipv6_mh_brr
++{
++	__u16		reserved;
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_bu
++{
++	__u16		sequence;	/* sequence number of BU	*/
++	__u8		flags;		/* flags			*/
++	__u8		reserved;	/* reserved bits		*/
++	__u16		lifetime;	/* lifetime of BU		*/
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_ba
++{
++	__u8		status;		/* statuscode			*/
++	__u8		reserved;	/* reserved bits		*/
++	__u16		sequence;	/* sequence number of BA	*/
++	__u16		lifetime;	/* lifetime in CN's bcache	*/
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_be
++{
++	__u8		status;
++	__u8		reserved;
++	struct in6_addr	home_addr;
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_addr_ti
++{
++	__u16		reserved;	/* Reserved			*/
++	u_int8_t	init_cookie[8]; /* HoT/CoT Init Cookie		*/
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_addr_test
++{
++	__u16		nonce_index;    /* Home/Care-of Nonce Index	*/
++	u_int8_t	init_cookie[8]; /* HoT/CoT Init Cookie		*/
++	u_int8_t	kgen_token[8];	/* Home/Care-of key generation token */
++	/* Mobility options */
++} __attribute__ ((packed));
++
++/*
++ * Mobility Options for various MH types.
++ */
++#define MIPV6_OPT_PAD1			0x00
++#define MIPV6_OPT_PADN			0x01
++#define MIPV6_OPT_BIND_REFRESH_ADVICE	0x02
++#define MIPV6_OPT_ALTERNATE_COA		0x03
++#define MIPV6_OPT_NONCE_INDICES		0x04
++#define MIPV6_OPT_AUTH_DATA		0x05
++
++#define MIPV6_SEQ_GT(x,y) \
++        ((short int)(((__u16)(x)) - ((__u16)(y))) > 0)
++
++/*
++ * Mobility Option structures
++ */
++
++struct mipv6_mo
++{
++	__u8		type;
++	__u8		length;
++	__u8		value[0];	/* type specific data */
++} __attribute__ ((packed));
++
++struct mipv6_mo_pad1
++{
++	__u8		type;
++} __attribute__ ((packed));
++
++struct mipv6_mo_padn
++{
++	__u8		type;
++	__u8		length;
++	__u8		data[0];
++} __attribute__ ((packed));
++
++struct mipv6_mo_alt_coa
++{
++	__u8		type;
++	__u8		length;
++	struct in6_addr	addr;		/* alternate care-of-address	*/
++} __attribute__ ((packed));
++
++struct mipv6_mo_nonce_indices
++{
++	__u8		type;
++	__u8		length;
++	__u16		home_nonce_i;	/* Home Nonce Index		*/
++	__u16		careof_nonce_i;	/* Careof Nonce Index		*/
++} __attribute__ ((packed)); 
++
++struct mipv6_mo_bauth_data
++{
++	__u8		type;
++	__u8		length;
++	__u8		data[0];
++} __attribute__ ((packed)); 
++
++struct mipv6_mo_br_advice
++{
++	__u8		type;
++	__u8		length;
++	__u16		refresh_interval; /* Refresh Interval		*/
++} __attribute__ ((packed));
++
++/*
++ * Home Address Destination Option structure
++ */
++struct mipv6_dstopt_homeaddr
++{
++	__u8		type;		/* type-code for option 	*/
++	__u8		length;		/* option length 		*/
++	struct in6_addr	addr;		/* home address 		*/
++} __attribute__ ((packed));
++
++#endif /* _NET_MIPV6_H */
+diff -uprN linux-2.4.25.old/include/net/ndisc.h linux-2.4.25/include/net/ndisc.h
+--- linux-2.4.25.old/include/net/ndisc.h	2002-11-28 23:53:15.000000000 +0000
++++ linux-2.4.25/include/net/ndisc.h	2004-06-26 11:29:29.000000000 +0100
+@@ -21,6 +21,10 @@
+ #define ND_OPT_REDIRECT_HDR		4
+ #define ND_OPT_MTU			5
+ 
++/* Mobile IPv6 specific ndisc options */ 
++#define ND_OPT_RTR_ADV_INTERVAL		7 
++#define ND_OPT_HOME_AGENT_INFO		8  
++
+ #define MAX_RTR_SOLICITATION_DELAY	HZ
+ 
+ #define ND_REACHABLE_TIME		(30*HZ)
+@@ -57,7 +61,7 @@ struct nd_opt_hdr {
+ } __attribute__((__packed__));
+ 
+ struct ndisc_options {
+-	struct nd_opt_hdr *nd_opt_array[7];
++	struct nd_opt_hdr *nd_opt_array[10];
+ 	struct nd_opt_hdr *nd_opt_piend;
+ };
+ 
+@@ -67,6 +71,8 @@ struct ndisc_options {
+ #define nd_opts_pi_end		nd_opt_piend
+ #define nd_opts_rh		nd_opt_array[ND_OPT_REDIRECT_HDR]
+ #define nd_opts_mtu		nd_opt_array[ND_OPT_MTU]
++#define nd_opts_rai		nd_opt_array[ND_OPT_RTR_ADV_INTERVAL]
++#define nd_opts_hai		nd_opt_array[ND_OPT_HOME_AGENT_INFO]
+ 
+ extern struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end);
+ extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts);
+@@ -83,6 +89,15 @@ extern void			ndisc_send_ns(struct net_d
+ 					      struct in6_addr *daddr,
+ 					      struct in6_addr *saddr);
+ 
++extern void			ndisc_send_na(struct net_device *dev,
++					      struct neighbour *neigh,
++					      struct in6_addr *daddr,
++					      struct in6_addr *solicited_addr,
++					      int router,
++					      int solicited,
++					      int override,
++					      int inc_opt);
++
+ extern void			ndisc_send_rs(struct net_device *dev,
+ 					      struct in6_addr *saddr,
+ 					      struct in6_addr *daddr);
+diff -uprN linux-2.4.25.old/include/net/sock.h linux-2.4.25/include/net/sock.h
+--- linux-2.4.25.old/include/net/sock.h	2004-02-18 13:36:32.000000000 +0000
++++ linux-2.4.25/include/net/sock.h	2004-06-26 11:29:30.000000000 +0100
+@@ -149,7 +149,9 @@ struct ipv6_pinfo {
+ 	struct in6_addr 	rcv_saddr;
+ 	struct in6_addr		daddr;
+ 	struct in6_addr		*daddr_cache;
+-
++#if defined(CONFIG_IPV6_SUBTREES)
++	struct in6_addr		*saddr_cache;
++#endif
+ 	__u32			flow_label;
+ 	__u32			frag_size;
+ 	int			hop_limit;
+diff -uprN linux-2.4.25.old/net/Makefile linux-2.4.25/net/Makefile
+--- linux-2.4.25.old/net/Makefile	2004-06-26 11:22:00.000000000 +0100
++++ linux-2.4.25/net/Makefile	2004-06-26 11:29:30.000000000 +0100
+@@ -7,7 +7,7 @@
+ 
+ O_TARGET :=	network.o
+ 
+-mod-subdirs :=	ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp
++mod-subdirs :=	ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp ipv6
+ export-objs :=	netsyms.o
+ 
+ subdir-y :=	core ethernet
+@@ -25,6 +25,7 @@ subdir-$(CONFIG_IP_SCTP)	+= sctp
+ ifneq ($(CONFIG_IPV6),n)
+ ifneq ($(CONFIG_IPV6),)
+ subdir-$(CONFIG_NETFILTER)	+= ipv6/netfilter
++subdir-$(CONFIG_IPV6_MOBILITY)	+= ipv6/mobile_ip6
+ endif
+ endif
+ 
+diff -uprN linux-2.4.25.old/net/core/neighbour.c linux-2.4.25/net/core/neighbour.c
+--- linux-2.4.25.old/net/core/neighbour.c	2004-02-18 13:36:32.000000000 +0000
++++ linux-2.4.25/net/core/neighbour.c	2004-06-26 11:29:30.000000000 +0100
+@@ -386,7 +386,7 @@ struct pneigh_entry * pneigh_lookup(stru
+ 	if (!creat)
+ 		return NULL;
+ 
+-	n = kmalloc(sizeof(*n) + key_len, GFP_KERNEL);
++	n = kmalloc(sizeof(*n) + key_len, GFP_ATOMIC);
+ 	if (n == NULL)
+ 		return NULL;
+ 
+diff -uprN linux-2.4.25.old/net/ipv6/Config.in linux-2.4.25/net/ipv6/Config.in
+--- linux-2.4.25.old/net/ipv6/Config.in	2001-12-21 17:42:05.000000000 +0000
++++ linux-2.4.25/net/ipv6/Config.in	2004-06-26 11:29:30.000000000 +0100
+@@ -1,10 +1,16 @@
+ #
+ # IPv6 configuration
+ # 
+-
++bool '    IPv6: routing by source address (EXPERIMENTAL)' CONFIG_IPV6_SUBTREES
+ #bool '    IPv6: flow policy support' CONFIG_RT6_POLICY
+ #bool '    IPv6: firewall support' CONFIG_IPV6_FIREWALL
+ 
++if [ "$CONFIG_IPV6" != "n" ]; then
++	dep_tristate '    IPv6: IPv6 over IPv6 Tunneling (EXPERIMENTAL)' CONFIG_IPV6_TUNNEL $CONFIG_IPV6
++fi
++
++source net/ipv6/mobile_ip6/Config.in
++
+ if [ "$CONFIG_NETFILTER" != "n" ]; then
+    source net/ipv6/netfilter/Config.in
+ fi
+diff -uprN linux-2.4.25.old/net/ipv6/Makefile linux-2.4.25/net/ipv6/Makefile
+--- linux-2.4.25.old/net/ipv6/Makefile	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/Makefile	2004-06-26 11:29:30.000000000 +0100
+@@ -6,18 +6,28 @@
+ # unless it's something special (ie not a .c file).
+ #
+ 
++export-objs := ipv6_syms.o ipv6_tunnel.o
+ 
+-O_TARGET := ipv6.o
++#list-multi 	:= ipv6.o ipv6_tunnel.o
+ 
+-obj-y :=	af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o sit.o \
+-		route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o raw.o \
+-		protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
+-		exthdrs.o sysctl_net_ipv6.o datagram.o proc.o \
+-		ip6_flowlabel.o ipv6_syms.o
++ipv6-objs	:= af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
++		   sit.o route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o \
++		   raw.o protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
++		   exthdrs.o sysctl_net_ipv6.o datagram.o proc.o \
++		   ip6_flowlabel.o ipv6_syms.o
++
++ifneq ($(CONFIG_IPV6_MOBILITY),n)
++ifneq ($(CONFIG_IPV6_MOBILITY),)
++ipv6-objs += mipglue.o
++endif
++endif
+ 
+-export-objs := ipv6_syms.o
++obj-$(CONFIG_IPV6)  += ipv6.o
++obj-$(CONFIG_IPV6_TUNNEL)  += ipv6_tunnel.o
++
++ipv6.o: $(ipv6-objs)
++	$(LD) -r -o $@ $(ipv6-objs)
+ 
+-obj-m  := $(O_TARGET)
+ 
+ #obj-$(CONFIG_IPV6_FIREWALL) += ip6_fw.o
+ 
+diff -uprN linux-2.4.25.old/net/ipv6/addrconf.c linux-2.4.25/net/ipv6/addrconf.c
+--- linux-2.4.25.old/net/ipv6/addrconf.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/addrconf.c	2004-06-26 11:29:30.000000000 +0100
+@@ -68,6 +68,8 @@
+ 
+ #include <asm/uaccess.h>
+ 
++#include <net/mipglue.h>
++
+ #define IPV6_MAX_ADDRESSES 16
+ 
+ /* Set to 3 to get tracing... */
+@@ -103,9 +105,9 @@ static spinlock_t addrconf_verify_lock =
+ 
+ static int addrconf_ifdown(struct net_device *dev, int how);
+ 
+-static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
++void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
+ static void addrconf_dad_timer(unsigned long data);
+-static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
++void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+ static void addrconf_rs_timer(unsigned long data);
+ static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
+ 
+@@ -330,38 +332,6 @@ static struct inet6_dev * ipv6_find_idev
+ 	return idev;
+ }
+ 
+-void ipv6_addr_prefix(struct in6_addr *prefix,
+-	struct in6_addr *addr, int prefix_len)
+-{
+-	unsigned long mask;
+-	int ncopy, nbits;
+-
+-	memset(prefix, 0, sizeof(*prefix));
+-
+-	if (prefix_len <= 0)
+-		return;
+-	if (prefix_len > 128)
+-		prefix_len = 128;
+-
+-	ncopy = prefix_len / 32;
+-	switch (ncopy) {
+-	case 4:	prefix->s6_addr32[3] = addr->s6_addr32[3];
+-	case 3:	prefix->s6_addr32[2] = addr->s6_addr32[2];
+-	case 2:	prefix->s6_addr32[1] = addr->s6_addr32[1];
+-	case 1:	prefix->s6_addr32[0] = addr->s6_addr32[0];
+-	case 0:	break;
+-	}
+-	nbits = prefix_len % 32;
+-	if (nbits == 0)
+-		return;
+-
+-	mask = ~((1 << (32 - nbits)) - 1);
+-	mask = htonl(mask);
+-
+-	prefix->s6_addr32[ncopy] = addr->s6_addr32[ncopy] & mask;
+-}
+-
+-
+ static void dev_forward_change(struct inet6_dev *idev)
+ {
+ 	struct net_device *dev;
+@@ -513,7 +483,7 @@ ipv6_add_addr(struct inet6_dev *idev, co
+ 
+ /* This function wants to get referenced ifp and releases it before return */
+ 
+-static void ipv6_del_addr(struct inet6_ifaddr *ifp)
++void ipv6_del_addr(struct inet6_ifaddr *ifp)
+ {
+ 	struct inet6_ifaddr *ifa, **ifap;
+ 	struct inet6_dev *idev = ifp->idev;
+@@ -662,6 +632,12 @@ out:
+ 	if (match)
+ 		in6_ifa_put(match);
+ 
++	/* The home address is always used as source address in
++	 * MIPL mobile IPv6
++	 */
++	if (scope != IFA_HOST && scope != IFA_LINK)
++		addrconf_get_mipv6_home_address(saddr);
++
+ 	return err;
+ }
+ 
+@@ -815,7 +791,7 @@ void addrconf_leave_solict(struct net_de
+ }
+ 
+ 
+-static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
++int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
+ {
+ 	switch (dev->type) {
+ 	case ARPHRD_ETHER:
+@@ -840,7 +816,7 @@ static int ipv6_generate_eui64(u8 *eui, 
+ 	return -1;
+ }
+ 
+-static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
++int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
+ {
+ 	int err = -1;
+ 	struct inet6_ifaddr *ifp;
+@@ -1407,6 +1383,24 @@ static void addrconf_sit_config(struct n
+ 		sit_route_add(dev);
+ }
+ 
++/**
++ * addrconf_ipv6_tunnel_config - configure IPv6 tunnel device
++ * @dev: tunnel device
++ **/
++
++static void addrconf_ipv6_tunnel_config(struct net_device *dev)
++{
++	struct inet6_dev *idev;
++
++	ASSERT_RTNL();
++
++	/* Assign inet6_dev structure to tunnel device */
++	if ((idev = ipv6_find_idev(dev)) == NULL) {
++		printk(KERN_DEBUG "init ipv6 tunnel: add_dev failed\n");
++		return;
++	}
++}
++
+ 
+ int addrconf_notify(struct notifier_block *this, unsigned long event, 
+ 		    void * data)
+@@ -1421,6 +1415,10 @@ int addrconf_notify(struct notifier_bloc
+ 			addrconf_sit_config(dev);
+ 			break;
+ 
++		case ARPHRD_TUNNEL6:
++			addrconf_ipv6_tunnel_config(dev);
++			break;
++
+ 		case ARPHRD_LOOPBACK:
+ 			init_loopback(dev);
+ 			break;
+@@ -1602,7 +1600,7 @@ out:
+ /*
+  *	Duplicate Address Detection
+  */
+-static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
++void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
+ {
+ 	struct net_device *dev;
+ 	unsigned long rand_num;
+@@ -1667,7 +1665,7 @@ static void addrconf_dad_timer(unsigned 
+ 	in6_ifa_put(ifp);
+ }
+ 
+-static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
++void addrconf_dad_completed(struct inet6_ifaddr *ifp)
+ {
+ 	struct net_device *	dev = ifp->idev->dev;
+ 
+@@ -1676,7 +1674,7 @@ static void addrconf_dad_completed(struc
+ 	 */
+ 
+ 	ipv6_ifa_notify(RTM_NEWADDR, ifp);
+-
++	notifier_call_chain(&inet6addr_chain,NETDEV_UP,ifp);
+ 	/* If added prefix is link local and forwarding is off,
+ 	   start sending router solicitations.
+ 	 */
+@@ -1877,8 +1875,20 @@ inet6_rtm_newaddr(struct sk_buff *skb, s
+ 	if (rta[IFA_LOCAL-1]) {
+ 		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+ 			return -EINVAL;
++		if (ifm->ifa_flags & IFA_F_HOMEADDR && !rta[IFA_HOMEAGENT-1])
++			return -EINVAL;
+ 		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
+ 	}
++	if (rta[IFA_HOMEAGENT-1]) {
++		struct in6_addr *ha;
++		if (pfx == NULL || !(ifm->ifa_flags & IFA_F_HOMEADDR))
++			return -EINVAL;
++		if (RTA_PAYLOAD(rta[IFA_HOMEAGENT-1]) < sizeof(*ha))
++			return -EINVAL;
++		ha = RTA_DATA(rta[IFA_HOMEAGENT-1]);
++		addrconf_set_mipv6_mn_home(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
++					   ha, ifm->ifa_prefixlen);
++	}
+ 	if (pfx == NULL)
+ 		return -EINVAL;
+ 
+diff -uprN linux-2.4.25.old/net/ipv6/af_inet6.c linux-2.4.25/net/ipv6/af_inet6.c
+--- linux-2.4.25.old/net/ipv6/af_inet6.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/af_inet6.c	2004-06-26 11:29:30.000000000 +0100
+@@ -58,6 +58,9 @@
+ #include <net/transp_v6.h>
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
++#ifdef CONFIG_IPV6_TUNNEL
++#include <net/ipv6_tunnel.h>
++#endif
+ 
+ #include <asm/uaccess.h>
+ #include <asm/system.h>
+@@ -646,6 +649,11 @@ static int __init inet6_init(void)
+ 	err = ndisc_init(&inet6_family_ops);
+ 	if (err)
+ 		goto ndisc_fail;
++#ifdef CONFIG_IPV6_TUNNEL
++	err = ip6_tunnel_init();
++	if (err)
++		goto ip6_tunnel_fail;
++#endif
+ 	err = igmp6_init(&inet6_family_ops);
+ 	if (err)
+ 		goto igmp_fail;
+@@ -698,6 +706,10 @@ proc_raw6_fail:
+ #endif
+ igmp_fail:
+ 	ndisc_cleanup();
++#ifdef CONFIG_IPV6_TUNNEL
++	ip6_tunnel_cleanup();
++ip6_tunnel_fail:
++#endif
+ ndisc_fail:
+ 	icmpv6_cleanup();
+ icmp_fail:
+@@ -730,6 +742,9 @@ static void inet6_exit(void)
+ 	ip6_route_cleanup();
+ 	ipv6_packet_cleanup();
+ 	igmp6_cleanup();
++#ifdef CONFIG_IPV6_TUNNEL
++	ip6_tunnel_cleanup();
++#endif
+ 	ndisc_cleanup();
+ 	icmpv6_cleanup();
+ #ifdef CONFIG_SYSCTL
+diff -uprN linux-2.4.25.old/net/ipv6/exthdrs.c linux-2.4.25/net/ipv6/exthdrs.c
+--- linux-2.4.25.old/net/ipv6/exthdrs.c	2003-08-25 12:44:44.000000000 +0100
++++ linux-2.4.25/net/ipv6/exthdrs.c	2004-06-26 11:29:30.000000000 +0100
+@@ -41,6 +41,9 @@
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
+ 
++#include <net/mipglue.h>
++#include <net/mipv6.h>
++
+ #include <asm/uaccess.h>
+ 
+ /*
+@@ -160,7 +163,8 @@ bad:
+  *****************************/
+ 
+ struct tlvtype_proc tlvprocdestopt_lst[] = {
+-	/* No destination options are defined now */
++	/* Mobility Support destination options */
++	{MIPV6_TLV_HOMEADDR,    mipv6_handle_dstopt},
+ 	{-1,			NULL}
+ };
+ 
+@@ -210,6 +214,7 @@ static int ipv6_routing_header(struct sk
+ 
+ 	struct ipv6_rt_hdr *hdr;
+ 	struct rt0_hdr *rthdr;
++	struct rt2_hdr *rt2hdr;
+ 
+ 	if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
+ 	    !pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
+@@ -225,17 +230,25 @@ static int ipv6_routing_header(struct sk
+ 		kfree_skb(skb);
+ 		return -1;
+ 	}
+-
++	/* Silently discard invalid packets containing RTH type 2 */ 
++	if (hdr->type == IPV6_SRCRT_TYPE_2 && 
++	    (hdr->hdrlen != 2 || hdr->segments_left != 1)) {
++		kfree_skb(skb);
++		return -1;
++	}
+ looped_back:
+ 	if (hdr->segments_left == 0) {
+-		opt->srcrt = skb->h.raw - skb->nh.raw;
++		if (hdr->type == IPV6_SRCRT_TYPE_0)
++			opt->srcrt = skb->h.raw - skb->nh.raw;
++		else if (hdr->type == IPV6_SRCRT_TYPE_2)
++			opt->srcrt2 = skb->h.raw - skb->nh.raw;
+ 		skb->h.raw += (hdr->hdrlen + 1) << 3;
+ 		opt->dst0 = opt->dst1;
+ 		opt->dst1 = 0;
+ 		return (&hdr->nexthdr) - skb->nh.raw;
+ 	}
+ 
+-	if (hdr->type != IPV6_SRCRT_TYPE_0) {
++	if (hdr->type != IPV6_SRCRT_TYPE_0 && hdr->type != IPV6_SRCRT_TYPE_2) {
+ 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) - skb->nh.raw);
+ 		return -1;
+ 	}
+@@ -275,9 +288,20 @@ looped_back:
+ 
+ 	i = n - --hdr->segments_left;
+ 
+-	rthdr = (struct rt0_hdr *) hdr;
+-	addr = rthdr->addr;
+-	addr += i - 1;
++	if (hdr->type == IPV6_SRCRT_TYPE_0) {
++		rthdr = (struct rt0_hdr *) hdr;
++		addr = rthdr->addr;
++		addr += i - 1;
++	} else {
++		/* check that address is this node's home address */
++		rt2hdr = (struct rt2_hdr *) hdr;
++		addr = &rt2hdr->addr;
++		if (!ipv6_chk_addr(addr, NULL) || 
++		    !ipv6_chk_mip_home_addr(addr)) {
++			kfree_skb(skb);
++			return -1;
++		}
++	}
+ 
+ 	addr_type = ipv6_addr_type(addr);
+ 
+@@ -330,6 +354,10 @@ looped_back:
+    temporary (or permanent) backdoor.
+    If listening socket set IPV6_RTHDR to 2, then we invert header.
+                                                    --ANK (980729)
++
++   By the Mobile IPv6 specification Type 2 routing header MUST NOT be
++   inverted.
++                                                   --AJT (20020917)
+  */
+ 
+ struct ipv6_txoptions *
+@@ -352,6 +380,18 @@ ipv6_invert_rthdr(struct sock *sk, struc
+ 	struct ipv6_txoptions *opt;
+ 	int hdrlen = ipv6_optlen(hdr);
+ 
++	if (hdr->type == IPV6_SRCRT_TYPE_2) {
++		opt = sock_kmalloc(sk, sizeof(*opt) + hdrlen, GFP_ATOMIC);
++		if (opt == NULL)
++			return NULL;
++		memset(opt, 0, sizeof(*opt));
++		opt->tot_len = sizeof(*opt) + hdrlen;
++		opt->srcrt = (void*)(opt+1);
++		opt->opt_nflen = hdrlen;
++		memcpy(opt->srcrt, hdr, sizeof(struct rt2_hdr));
++		return opt;
++	}
++
+ 	if (hdr->segments_left ||
+ 	    hdr->type != IPV6_SRCRT_TYPE_0 ||
+ 	    hdr->hdrlen & 0x01)
+@@ -622,8 +662,18 @@ u8 *ipv6_build_nfrag_opts(struct sk_buff
+ 	if (opt) {
+ 		if (opt->dst0opt)
+ 			prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_DEST, opt->dst0opt);
+-		if (opt->srcrt)
+-			prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, daddr);
++		if (opt->srcrt) {
++			if (opt->srcrt2) {
++				struct in6_addr *rt2_hop = &((struct rt2_hdr *)opt->srcrt2)->addr;
++				prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, rt2_hop);
++			} else
++				prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, daddr);
++		}
++		if (opt->srcrt2) {
++			struct inet6_skb_parm *parm = (struct inet6_skb_parm *)skb->cb;
++			ipv6_addr_copy(&parm->hoa, daddr);
++			prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt2, daddr);
++		}
+ 	}
+ 	return prev_hdr;
+ }
+@@ -684,6 +734,11 @@ void ipv6_push_nfrag_opts(struct sk_buff
+ 			  u8 *proto,
+ 			  struct in6_addr **daddr)
+ {
++	if (opt->srcrt2) {
++		struct inet6_skb_parm *parm = (struct inet6_skb_parm *)skb->cb;
++		ipv6_addr_copy(&parm->hoa, *daddr);
++		ipv6_push_rthdr(skb, proto, opt->srcrt2, daddr);
++	}
+ 	if (opt->srcrt)
+ 		ipv6_push_rthdr(skb, proto, opt->srcrt, daddr);
+ 	if (opt->dst0opt)
+@@ -719,6 +774,8 @@ ipv6_dup_options(struct sock *sk, struct
+ 			*((char**)&opt2->auth) += dif;
+ 		if (opt2->srcrt)
+ 			*((char**)&opt2->srcrt) += dif;
++		if (opt2->srcrt2)
++			*((char**)&opt2->srcrt2) += dif;
+ 	}
+ 	return opt2;
+ }
+diff -uprN linux-2.4.25.old/net/ipv6/icmp.c linux-2.4.25/net/ipv6/icmp.c
+--- linux-2.4.25.old/net/ipv6/icmp.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/icmp.c	2004-06-26 11:29:30.000000000 +0100
+@@ -61,6 +61,8 @@
+ #include <net/addrconf.h>
+ #include <net/icmp.h>
+ 
++#include <net/mipglue.h>
++
+ #include <asm/uaccess.h>
+ #include <asm/system.h>
+ 
+@@ -364,6 +366,8 @@ void icmpv6_send(struct sk_buff *skb, in
+ 
+ 	msg.len = len;
+ 
++	icmpv6_swap_mipv6_addrs(skb);
++
+ 	ip6_build_xmit(sk, icmpv6_getfrag, &msg, &fl, len, NULL, -1,
+ 		       MSG_DONTWAIT);
+ 	if (type >= ICMPV6_DEST_UNREACH && type <= ICMPV6_PARAMPROB)
+@@ -562,13 +566,13 @@ int icmpv6_rcv(struct sk_buff *skb)
+ 		rt6_pmtu_discovery(&orig_hdr->daddr, &orig_hdr->saddr, dev,
+ 				   ntohl(hdr->icmp6_mtu));
+ 
+-		/*
+-		 *	Drop through to notify
+-		 */
++		icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
++		break;
+ 
+ 	case ICMPV6_DEST_UNREACH:
+-	case ICMPV6_TIME_EXCEED:
+ 	case ICMPV6_PARAMPROB:
++		mipv6_icmp_rcv(skb);
++	case ICMPV6_TIME_EXCEED:
+ 		icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
+ 		break;
+ 
+@@ -597,6 +601,13 @@ int icmpv6_rcv(struct sk_buff *skb)
+ 	case ICMPV6_MGM_REDUCTION:
+ 		break;
+ 
++	case MIPV6_DHAAD_REQUEST:
++	case MIPV6_DHAAD_REPLY:
++	case MIPV6_PREFIX_SOLICIT:
++	case MIPV6_PREFIX_ADV:
++		mipv6_icmp_rcv(skb);
++		break;
++
+ 	default:
+ 		if (net_ratelimit())
+ 			printk(KERN_DEBUG "icmpv6: msg of unkown type\n");
+diff -uprN linux-2.4.25.old/net/ipv6/ip6_fib.c linux-2.4.25/net/ipv6/ip6_fib.c
+--- linux-2.4.25.old/net/ipv6/ip6_fib.c	2003-08-25 12:44:44.000000000 +0100
++++ linux-2.4.25/net/ipv6/ip6_fib.c	2004-06-26 11:29:30.000000000 +0100
+@@ -18,6 +18,7 @@
+  * 	Yuji SEKIYA @USAGI:	Support default route on router node;
+  * 				remove ip6_null_entry from the top of
+  * 				routing table.
++ * 	Ville Nuorvala:		Fixes to source address based routing
+  */
+ #include <linux/config.h>
+ #include <linux/errno.h>
+@@ -40,7 +41,6 @@
+ #include <net/ip6_route.h>
+ 
+ #define RT6_DEBUG 2
+-#undef CONFIG_IPV6_SUBTREES
+ 
+ #if RT6_DEBUG >= 3
+ #define RT6_TRACE(x...) printk(KERN_DEBUG x)
+@@ -500,6 +500,8 @@ static __inline__ void fib6_start_gc(str
+ 		mod_timer(&ip6_fib_timer, jiffies + ip6_rt_gc_interval);
+ }
+ 
++static struct rt6_info * fib6_find_prefix(struct fib6_node *fn);
++
+ /*
+  *	Add routing information to the routing tree.
+  *	<destination addr>/<source addr>
+@@ -508,17 +510,19 @@ static __inline__ void fib6_start_gc(str
+ 
+ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nlmsghdr *nlh)
+ {
+-	struct fib6_node *fn;
++	struct fib6_node *fn = root;
+ 	int err = -ENOMEM;
+ 
+-	fn = fib6_add_1(root, &rt->rt6i_dst.addr, sizeof(struct in6_addr),
+-			rt->rt6i_dst.plen, (u8*) &rt->rt6i_dst - (u8*) rt);
++#ifdef CONFIG_IPV6_SUBTREES
++	struct fib6_node *pn = NULL;
+ 
++	fn = fib6_add_1(root, &rt->rt6i_src.addr, sizeof(struct in6_addr),
++			rt->rt6i_src.plen, (u8*) &rt->rt6i_src - (u8*) rt);
++	
+ 	if (fn == NULL)
+ 		goto out;
+ 
+-#ifdef CONFIG_IPV6_SUBTREES
+-	if (rt->rt6i_src.plen) {
++	if (rt->rt6i_dst.plen) {
+ 		struct fib6_node *sn;
+ 
+ 		if (fn->subtree == NULL) {
+@@ -546,9 +550,9 @@ int fib6_add(struct fib6_node *root, str
+ 
+ 			/* Now add the first leaf node to new subtree */
+ 
+-			sn = fib6_add_1(sfn, &rt->rt6i_src.addr,
+-					sizeof(struct in6_addr), rt->rt6i_src.plen,
+-					(u8*) &rt->rt6i_src - (u8*) rt);
++			sn = fib6_add_1(sfn, &rt->rt6i_dst.addr,
++					sizeof(struct in6_addr), rt->rt6i_dst.plen,
++					(u8*) &rt->rt6i_dst - (u8*) rt);
+ 
+ 			if (sn == NULL) {
+ 				/* If it is failed, discard just allocated
+@@ -562,21 +566,30 @@ int fib6_add(struct fib6_node *root, str
+ 			/* Now link new subtree to main tree */
+ 			sfn->parent = fn;
+ 			fn->subtree = sfn;
+-			if (fn->leaf == NULL) {
+-				fn->leaf = rt;
+-				atomic_inc(&rt->rt6i_ref);
+-			}
+ 		} else {
+-			sn = fib6_add_1(fn->subtree, &rt->rt6i_src.addr,
+-					sizeof(struct in6_addr), rt->rt6i_src.plen,
+-					(u8*) &rt->rt6i_src - (u8*) rt);
++			sn = fib6_add_1(fn->subtree, &rt->rt6i_dst.addr,
++					sizeof(struct in6_addr), rt->rt6i_dst.plen,
++					(u8*) &rt->rt6i_dst - (u8*) rt);
+ 
+ 			if (sn == NULL)
+ 				goto st_failure;
+ 		}
+ 
++		/* fib6_add_1 might have cleared the old leaf pointer */
++		if (fn->leaf == NULL) {
++			fn->leaf = rt;
++			atomic_inc(&rt->rt6i_ref);
++		}
++
++		pn = fn;
+ 		fn = sn;
+ 	}
++#else 
++	fn = fib6_add_1(root, &rt->rt6i_dst.addr, sizeof(struct in6_addr),
++			rt->rt6i_dst.plen, (u8*) &rt->rt6i_dst - (u8*) rt);
++
++	if (fn == NULL)
++		goto out;
+ #endif
+ 
+ 	err = fib6_add_rt2node(fn, rt, nlh);
+@@ -588,8 +601,30 @@ int fib6_add(struct fib6_node *root, str
+ 	}
+ 
+ out:
+-	if (err)
++	if (err) {
++#ifdef CONFIG_IPV6_SUBTREES
++
++		/* If fib6_add_1 has cleared the old leaf pointer in the 
++		   super-tree leaf node, we have to find a new one for it. 
++		   
++		   This situation will never arise in the sub-tree since 
++		   the node will at least have the route that caused 
++		   fib6_add_rt2node to fail.
++		*/
++
++		if (pn && !(pn->fn_flags & RTN_RTINFO)) {
++			pn->leaf = fib6_find_prefix(pn);
++#if RT6_DEBUG >= 2
++			if (!pn->leaf) {
++				BUG_TRAP(pn->leaf);
++				pn->leaf = &ip6_null_entry;
++			}
++#endif
++			atomic_inc(&pn->leaf->rt6i_ref);
++		}
++#endif
+ 		dst_free(&rt->u.dst);
++	}
+ 	return err;
+ 
+ #ifdef CONFIG_IPV6_SUBTREES
+@@ -597,8 +632,8 @@ out:
+ 	   is orphan. If it is, shoot it.
+ 	 */
+ st_failure:
+-	if (fn && !(fn->fn_flags&RTN_RTINFO|RTN_ROOT))
+-		fib_repair_tree(fn);
++	if (fn && !(fn->fn_flags & (RTN_RTINFO | RTN_ROOT)))
++		fib6_repair_tree(fn);
+ 	dst_free(&rt->u.dst);
+ 	return err;
+ #endif
+@@ -641,22 +676,28 @@ static struct fib6_node * fib6_lookup_1(
+ 		break;
+ 	}
+ 
+-	while ((fn->fn_flags & RTN_ROOT) == 0) {
++	for (;;) {
+ #ifdef CONFIG_IPV6_SUBTREES
+ 		if (fn->subtree) {
+-			struct fib6_node *st;
+-			struct lookup_args *narg;
+-
+-			narg = args + 1;
+-
+-			if (narg->addr) {
+-				st = fib6_lookup_1(fn->subtree, narg);
++			struct rt6key *key;
+ 
+-				if (st && !(st->fn_flags & RTN_ROOT))
+-					return st;
++			key = (struct rt6key *) ((u8 *) fn->leaf +
++						 args->offset);
++			
++			if (addr_match(&key->addr, args->addr, key->plen)) {
++				struct fib6_node *st;
++				struct lookup_args *narg = args + 1;
++				if (!ipv6_addr_any(narg->addr)) {
++					st = fib6_lookup_1(fn->subtree, narg);
++					
++					if (st && !(st->fn_flags & RTN_ROOT))
++						return st;
++				} 
+ 			}
+ 		}
+ #endif
++		if (fn->fn_flags & RTN_ROOT)
++			break;
+ 
+ 		if (fn->fn_flags & RTN_RTINFO) {
+ 			struct rt6key *key;
+@@ -680,13 +721,22 @@ struct fib6_node * fib6_lookup(struct fi
+ 	struct lookup_args args[2];
+ 	struct rt6_info *rt = NULL;
+ 	struct fib6_node *fn;
++#ifdef CONFIG_IPV6_SUBTREES
++	struct in6_addr saddr_buf;
++#endif
+ 
++#ifdef CONFIG_IPV6_SUBTREES
++	if (saddr == NULL) {
++		memset(&saddr_buf, 0, sizeof(struct in6_addr));
++		saddr = &saddr_buf;
++	}
++	args[0].offset = (u8*) &rt->rt6i_src - (u8*) rt;
++	args[0].addr = saddr;
++	args[1].offset = (u8*) &rt->rt6i_dst - (u8*) rt;
++	args[1].addr = daddr;
++#else 
+ 	args[0].offset = (u8*) &rt->rt6i_dst - (u8*) rt;
+ 	args[0].addr = daddr;
+-
+-#ifdef CONFIG_IPV6_SUBTREES
+-	args[1].offset = (u8*) &rt->rt6i_src - (u8*) rt;
+-	args[1].addr = saddr;
+ #endif
+ 
+ 	fn = fib6_lookup_1(root, args);
+@@ -739,19 +789,25 @@ struct fib6_node * fib6_locate(struct fi
+ {
+ 	struct rt6_info *rt = NULL;
+ 	struct fib6_node *fn;
+-
+-	fn = fib6_locate_1(root, daddr, dst_len,
+-			   (u8*) &rt->rt6i_dst - (u8*) rt);
+-
+ #ifdef CONFIG_IPV6_SUBTREES
+-	if (src_len) {
+-		BUG_TRAP(saddr!=NULL);
+-		if (fn == NULL)
+-			fn = fn->subtree;
++	struct in6_addr saddr_buf;
++
++	if (saddr == NULL) {
++		memset(&saddr_buf, 0, sizeof(struct in6_addr));
++		saddr = &saddr_buf;
++	}
++	fn = fib6_locate_1(root, saddr, src_len, 
++			   (u8*) &rt->rt6i_src - (u8*) rt);
++	if (dst_len) {
+ 		if (fn)
+-			fn = fib6_locate_1(fn, saddr, src_len,
+-					   (u8*) &rt->rt6i_src - (u8*) rt);
++			fn = fib6_locate_1(fn->subtree, daddr, dst_len,
++					   (u8*) &rt->rt6i_dst - (u8*) rt);
++		else 
++			return NULL;
+ 	}
++#else
++	fn = fib6_locate_1(root, daddr, dst_len,
++			   (u8*) &rt->rt6i_dst - (u8*) rt);
+ #endif
+ 
+ 	if (fn && fn->fn_flags&RTN_RTINFO)
+@@ -939,7 +995,7 @@ static void fib6_del_route(struct fib6_n
+ 			}
+ 			fn = fn->parent;
+ 		}
+-		/* No more references are possiible at this point. */
++		/* No more references are possible at this point. */
+ 		if (atomic_read(&rt->rt6i_ref) != 1) BUG();
+ 	}
+ 
+diff -uprN linux-2.4.25.old/net/ipv6/ip6_input.c linux-2.4.25/net/ipv6/ip6_input.c
+--- linux-2.4.25.old/net/ipv6/ip6_input.c	2003-08-25 12:44:44.000000000 +0100
++++ linux-2.4.25/net/ipv6/ip6_input.c	2004-06-26 11:29:30.000000000 +0100
+@@ -40,13 +40,42 @@
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
+ 
++static inline int ip6_proxy_chk(struct sk_buff *skb)
++{
++	struct ipv6hdr *hdr = skb->nh.ipv6h;
+ 
+-
++	if (ipv6_addr_type(&hdr->daddr)&IPV6_ADDR_UNICAST &&
++	    pneigh_lookup(&nd_tbl, &hdr->daddr, skb->dev, 0)) {
++		u8 nexthdr = hdr->nexthdr;
++		int offset;
++		struct icmp6hdr msg;
++
++		if (ipv6_ext_hdr(nexthdr)) {
++			offset = ipv6_skip_exthdr(skb, sizeof(*hdr), &nexthdr, 
++						  skb->len - sizeof(*hdr));
++			if (offset < 0)
++				return 0;
++		} else
++			offset = sizeof(*hdr);
++
++		/* capture unicast NUD probes on behalf of the proxied node */
++
++		if (nexthdr == IPPROTO_ICMPV6 &&
++		    !skb_copy_bits(skb, offset, &msg, sizeof(msg)) &&
++		    msg.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) {
++			return 1;
++		}
++	}
++	return 0;
++}
++ 
+ static inline int ip6_rcv_finish( struct sk_buff *skb) 
+ {
+-	if (skb->dst == NULL)
+-		ip6_route_input(skb);
+-
++	if (skb->dst == NULL) {
++		if (ip6_proxy_chk(skb)) 
++			return ip6_input(skb);
++ 		ip6_route_input(skb);
++	}
+ 	return skb->dst->input(skb);
+ }
+ 
+diff -uprN linux-2.4.25.old/net/ipv6/ip6_output.c linux-2.4.25/net/ipv6/ip6_output.c
+--- linux-2.4.25.old/net/ipv6/ip6_output.c	2003-08-25 12:44:44.000000000 +0100
++++ linux-2.4.25/net/ipv6/ip6_output.c	2004-06-26 11:29:30.000000000 +0100
+@@ -50,6 +50,8 @@
+ #include <net/rawv6.h>
+ #include <net/icmp.h>
+ 
++#include <net/mipglue.h>
++
+ static __inline__ void ipv6_select_ident(struct sk_buff *skb, struct frag_hdr *fhdr)
+ {
+ 	static u32 ipv6_fragmentation_id = 1;
+@@ -194,7 +196,14 @@ int ip6_xmit(struct sock *sk, struct sk_
+ 	u8  proto = fl->proto;
+ 	int seg_len = skb->len;
+ 	int hlimit;
++	int retval;
++	struct ipv6_txoptions *orig_opt = opt;
++
++	opt = ip6_add_mipv6_txoptions(sk, skb, orig_opt, fl, &dst);
+ 
++	if(orig_opt && !opt)
++		return -ENOMEM;
++		
+ 	if (opt) {
+ 		int head_room;
+ 
+@@ -209,8 +218,11 @@ int ip6_xmit(struct sock *sk, struct sk_
+ 			struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
+ 			kfree_skb(skb);
+ 			skb = skb2;
+-			if (skb == NULL)
++			if (skb == NULL) {
++				ip6_free_mipv6_txoptions(opt, orig_opt);
++
+ 				return -ENOBUFS;
++			}
+ 			if (sk)
+ 				skb_set_owner_w(skb, sk);
+ 		}
+@@ -242,7 +254,10 @@ int ip6_xmit(struct sock *sk, struct sk_
+ 
+ 	if (skb->len <= dst->pmtu) {
+ 		IP6_INC_STATS(Ip6OutRequests);
+-		return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
++		ip6_mark_mipv6_packet(opt, skb);
++		retval = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
++		ip6_free_mipv6_txoptions(opt, orig_opt);
++		return retval; 
+ 	}
+ 
+ 	if (net_ratelimit())
+@@ -250,6 +265,9 @@ int ip6_xmit(struct sock *sk, struct sk_
+ 	skb->dev = dst->dev;
+ 	icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, dst->pmtu, skb->dev);
+ 	kfree_skb(skb);
++
++	ip6_free_mipv6_txoptions(opt, orig_opt);
++
+ 	return -EMSGSIZE;
+ }
+ 
+@@ -473,6 +491,7 @@ static int ip6_frag_xmit(struct sock *sk
+ 
+ 			IP6_INC_STATS(Ip6FragCreates);
+ 			IP6_INC_STATS(Ip6OutRequests);
++			ip6_mark_mipv6_packet(opt, skb);
+ 			err = NF_HOOK(PF_INET6,NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
+ 			if (err) {
+ 				kfree_skb(last_skb);
+@@ -499,6 +518,7 @@ static int ip6_frag_xmit(struct sock *sk
+ 	IP6_INC_STATS(Ip6FragCreates);
+ 	IP6_INC_STATS(Ip6FragOKs);
+ 	IP6_INC_STATS(Ip6OutRequests);
++	ip6_mark_mipv6_packet(opt, last_skb);
+ 	return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, last_skb, NULL,dst->dev, ip6_maybe_reroute);
+ }
+ 
+@@ -509,26 +529,43 @@ int ip6_build_xmit(struct sock *sk, inet
+ 	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
+ 	struct in6_addr *final_dst = NULL;
+ 	struct dst_entry *dst;
++	struct rt6_info *rt;
+ 	int err = 0;
+ 	unsigned int pktlength, jumbolen, mtu;
+ 	struct in6_addr saddr;
++	struct ipv6_txoptions *orig_opt = opt; 
++#ifdef CONFIG_IPV6_SUBTREES
++	struct dst_entry *org_dst;
++#endif
++
++	opt = ip6_add_mipv6_txoptions(sk, NULL, orig_opt, fl, NULL);
++
++	if(orig_opt && !opt)
++		return -ENOMEM;
+ 
+ 	if (opt && opt->srcrt) {
+ 		struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
+ 		final_dst = fl->fl6_dst;
+ 		fl->fl6_dst = rt0->addr;
+-	}
++	} else if (opt && opt->srcrt2) {
++                struct rt2_hdr *rt2 = (struct rt2_hdr *) opt->srcrt2;
++                final_dst = fl->fl6_dst;
++                fl->fl6_dst = &rt2->addr;
++        }
+ 
+ 	if (!fl->oif && ipv6_addr_is_multicast(fl->nl_u.ip6_u.daddr))
+ 		fl->oif = np->mcast_oif;
+ 
+ 	dst = __sk_dst_check(sk, np->dst_cookie);
++#ifdef CONFIG_IPV6_SUBTREES
++	org_dst = dst;
++#endif
+ 	if (dst) {
+-		struct rt6_info *rt = (struct rt6_info*)dst;
++		rt = (struct rt6_info*)dst;
+ 
+ 			/* Yes, checking route validity in not connected
+ 			   case is not very simple. Take into account,
+-			   that we do not support routing by source, TOS,
++			   that we do not support routing by TOS,
+ 			   and MSG_DONTROUTE 		--ANK (980726)
+ 
+ 			   1. If route was host route, check that
+@@ -548,6 +585,13 @@ int ip6_build_xmit(struct sock *sk, inet
+ 		      ipv6_addr_cmp(fl->fl6_dst, &rt->rt6i_dst.addr))
+ 		     && (np->daddr_cache == NULL ||
+ 			 ipv6_addr_cmp(fl->fl6_dst, np->daddr_cache)))
++#ifdef CONFIG_IPV6_SUBTREES
++		    || (fl->fl6_src != NULL
++			&& (rt->rt6i_src.plen != 128 ||
++			    ipv6_addr_cmp(fl->fl6_src, &rt->rt6i_src.addr))
++			&& (np->saddr_cache == NULL ||
++			    ipv6_addr_cmp(fl->fl6_src, np->saddr_cache)))
++#endif
+ 		    || (fl->oif && fl->oif != dst->dev->ifindex)) {
+ 			dst = NULL;
+ 		} else
+@@ -560,21 +604,42 @@ int ip6_build_xmit(struct sock *sk, inet
+ 	if (dst->error) {
+ 		IP6_INC_STATS(Ip6OutNoRoutes);
+ 		dst_release(dst);
++		ip6_free_mipv6_txoptions(opt, orig_opt);
+ 		return -ENETUNREACH;
+ 	}
+ 
+ 	if (fl->fl6_src == NULL) {
+ 		err = ipv6_get_saddr(dst, fl->fl6_dst, &saddr);
+-
+ 		if (err) {
+ #if IP6_DEBUG >= 2
+ 			printk(KERN_DEBUG "ip6_build_xmit: "
+ 			       "no available source address\n");
+ #endif
++
++#ifdef CONFIG_IPV6_SUBTREES
++			if (dst != org_dst) {
++				dst_release(dst);
++				dst = org_dst;
++			}
++#endif		
+ 			goto out;
+ 		}
+ 		fl->fl6_src = &saddr;
+ 	}
++#ifdef CONFIG_IPV6_SUBTREES
++	rt = (struct rt6_info*)dst;
++	if (dst != org_dst || rt->rt6i_src.plen != 128 ||
++	    ipv6_addr_cmp(fl->fl6_src, &rt->rt6i_src.addr)) {
++		dst_release(dst);
++		dst = ip6_route_output(sk, fl);
++		if (dst->error) {
++			IP6_INC_STATS(Ip6OutNoRoutes);
++			dst_release(dst);
++			ip6_free_mipv6_txoptions(opt, orig_opt);
++			return -ENETUNREACH;
++		}
++	}
++#endif
+ 	pktlength = length;
+ 
+ 	if (hlimit < 0) {
+@@ -667,6 +732,7 @@ int ip6_build_xmit(struct sock *sk, inet
+ 
+ 		if (!err) {
+ 			IP6_INC_STATS(Ip6OutRequests);
++			ip6_mark_mipv6_packet(opt, skb);
+ 			err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
+ 		} else {
+ 			err = -EFAULT;
+@@ -688,9 +754,14 @@ int ip6_build_xmit(struct sock *sk, inet
+ 	 *	cleanup
+ 	 */
+ out:
+-	ip6_dst_store(sk, dst, fl->nl_u.ip6_u.daddr == &np->daddr ? &np->daddr : NULL);
++	ip6_dst_store(sk, dst, 
++		      fl->nl_u.ip6_u.daddr == &np->daddr ? &np->daddr : NULL,
++		      fl->nl_u.ip6_u.saddr == &np->saddr ? &np->saddr : NULL);
+ 	if (err > 0)
+ 		err = np->recverr ? net_xmit_errno(err) : 0;
++
++	ip6_free_mipv6_txoptions(opt, orig_opt);
++
+ 	return err;
+ }
+ 
+@@ -769,6 +840,15 @@ int ip6_forward(struct sk_buff *skb)
+ 		return -ETIMEDOUT;
+ 	}
+ 
++	/* The proxying router can't forward traffic sent to a link-local
++	   address, so signal the sender and discard the packet. This
++	   behavior is required by the MIPv6 specification. */
++
++	if (ipv6_addr_type(&hdr->daddr) & IPV6_ADDR_LINKLOCAL && 
++	    skb->dev && pneigh_lookup(&nd_tbl, &hdr->daddr, skb->dev, 0)) {
++		dst_link_failure(skb);
++		goto drop;
++	}
+ 	/* IPv6 specs say nothing about it, but it is clear that we cannot
+ 	   send redirects to source routed frames.
+ 	 */
+diff -uprN linux-2.4.25.old/net/ipv6/ipv6_syms.c linux-2.4.25/net/ipv6/ipv6_syms.c
+--- linux-2.4.25.old/net/ipv6/ipv6_syms.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/ipv6_syms.c	2004-06-26 11:29:30.000000000 +0100
+@@ -6,6 +6,8 @@
+ #include <net/ipv6.h>
+ #include <net/addrconf.h>
+ #include <net/ip6_route.h>
++#include <net/ndisc.h>
++#include <net/mipglue.h>
+ 
+ EXPORT_SYMBOL(ipv6_addr_type);
+ EXPORT_SYMBOL(icmpv6_send);
+@@ -33,3 +35,48 @@ EXPORT_SYMBOL(inet6_ioctl);
+ EXPORT_SYMBOL(ipv6_get_saddr);
+ EXPORT_SYMBOL(ipv6_chk_addr);
+ EXPORT_SYMBOL(in6_dev_finish_destroy);
++
++#if defined(CONFIG_IPV6_TUNNEL_MODULE) || defined(CONFIG_IPV6_MOBILITY_MODULE)
++EXPORT_SYMBOL(ip6_build_xmit);
++EXPORT_SYMBOL(rt6_lookup);
++EXPORT_SYMBOL(ipv6_ext_hdr);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_MODULE
++EXPORT_SYMBOL(mipv6_functions);
++EXPORT_SYMBOL(mipv6_invalidate_calls);
++#if defined(CONFIG_IPV6_MOBILITY_HA_MODULE) || defined(CONFIG_IPV6_MOBILITY_MN_MODULE)
++EXPORT_SYMBOL(ip6_route_add);
++EXPORT_SYMBOL(ip6_route_del);
++EXPORT_SYMBOL(ipv6_get_lladdr);
++EXPORT_SYMBOL(ipv6_get_ifaddr);
++EXPORT_SYMBOL(nd_tbl);
++EXPORT_SYMBOL(ndisc_send_ns);
++EXPORT_SYMBOL(ndisc_send_na);
++EXPORT_SYMBOL(ndisc_next_option);
++EXPORT_SYMBOL(inet6_ifa_finish_destroy);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_HA_MODULE
++EXPORT_SYMBOL(ipv6_dev_ac_dec);
++EXPORT_SYMBOL(ipv6_dev_ac_inc);
++EXPORT_SYMBOL(ipv6_dev_mc_dec);
++EXPORT_SYMBOL(ipv6_dev_mc_inc);
++EXPORT_SYMBOL(ip6_forward);
++EXPORT_SYMBOL(ip6_input);
++EXPORT_SYMBOL(ipv6_chk_acast_addr);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_MN_MODULE
++#endif
++EXPORT_SYMBOL(addrconf_add_ifaddr);
++EXPORT_SYMBOL(addrconf_del_ifaddr);
++EXPORT_SYMBOL(addrconf_dad_start);
++EXPORT_SYMBOL(ip6_del_rt);
++EXPORT_SYMBOL(ip6_routing_table);
++EXPORT_SYMBOL(rt6_get_dflt_router);
++EXPORT_SYMBOL(rt6_purge_dflt_routers);
++EXPORT_SYMBOL(rt6_lock);
++EXPORT_SYMBOL(ndisc_send_rs);
++EXPORT_SYMBOL(fib6_clean_tree);
++EXPORT_SYMBOL(ipv6_del_addr);
++EXPORT_SYMBOL(ipv6_generate_eui64);
++EXPORT_SYMBOL(ipv6_inherit_eui64);
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/ipv6_tunnel.c linux-2.4.25/net/ipv6/ipv6_tunnel.c
+--- linux-2.4.25.old/net/ipv6/ipv6_tunnel.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/ipv6_tunnel.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,1604 @@
++/*
++ *	IPv6 over IPv6 tunnel device
++ *	Linux INET6 implementation
++ *
++ *	Authors:
++ *	Ville Nuorvala		<vnuorval@tcs.hut.fi>	
++ *
++ *	$Id$
++ *
++ *      Based on:
++ *      linux/net/ipv6/sit.c
++ *
++ *      RFC 2473
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/errno.h>
++#include <linux/types.h>
++#include <linux/socket.h>
++#include <linux/sockios.h>
++#include <linux/if.h>
++#include <linux/in.h>
++#include <linux/ip.h>
++#include <linux/if_tunnel.h>
++#include <linux/net.h>
++#include <linux/in6.h>
++#include <linux/netdevice.h>
++#include <linux/if_arp.h>
++#include <linux/icmpv6.h>
++#include <linux/init.h>
++#include <linux/route.h>
++#include <linux/rtnetlink.h>
++#include <linux/tqueue.h>
++
++#include <asm/uaccess.h>
++#include <asm/atomic.h>
++
++#include <net/sock.h>
++#include <net/ipv6.h>
++#include <net/protocol.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/ipv6_tunnel.h>
++
++MODULE_AUTHOR("Ville Nuorvala");
++MODULE_DESCRIPTION("IPv6-in-IPv6 tunnel");
++MODULE_LICENSE("GPL");
++
++#define IPV6_TLV_TEL_DST_SIZE 8
++
++#ifdef IP6_TNL_DEBUG
++#define IP6_TNL_TRACE(x...) printk(KERN_DEBUG "%s:" x "\n", __FUNCTION__)
++#else
++#define IP6_TNL_TRACE(x...) do {;} while(0)
++#endif
++
++#define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK)
++
++#define HASH_SIZE  32
++
++#define HASH(addr) (((addr)->s6_addr32[0] ^ (addr)->s6_addr32[1] ^ \
++	             (addr)->s6_addr32[2] ^ (addr)->s6_addr32[3]) & \
++                    (HASH_SIZE - 1))
++
++static int ip6ip6_fb_tnl_dev_init(struct net_device *dev);
++static int ip6ip6_tnl_dev_init(struct net_device *dev);
++
++/* the IPv6 IPv6 tunnel fallback device */
++static struct net_device ip6ip6_fb_tnl_dev = {
++	name: "ip6tnl0",
++	init: ip6ip6_fb_tnl_dev_init
++};
++
++/* the IPv6 IPv6 fallback tunnel */
++static struct ip6_tnl ip6ip6_fb_tnl = {
++	dev: &ip6ip6_fb_tnl_dev,
++	parms:{name: "ip6tnl0", proto: IPPROTO_IPV6}
++};
++
++/* lists for storing tunnels in use */
++static struct ip6_tnl *tnls_r_l[HASH_SIZE];
++static struct ip6_tnl *tnls_wc[1];
++static struct ip6_tnl **tnls[2] = { tnls_wc, tnls_r_l };
++
++/* list for unused cached kernel tunnels */
++static struct ip6_tnl *tnls_kernel[1];
++/* maximum number of cached kernel tunnels */
++static unsigned int max_kdev_count = 0;
++/* minimum number of cached kernel tunnels */
++static unsigned int min_kdev_count = 0;
++/* current number of cached kernel tunnels */
++static unsigned int kdev_count = 0;
++
++/* lists for tunnel hook functions */
++static struct list_head hooks[IP6_TNL_MAXHOOKS];
++
++/* locks for the different lists */
++static rwlock_t ip6ip6_lock = RW_LOCK_UNLOCKED;
++static rwlock_t ip6ip6_kernel_lock = RW_LOCK_UNLOCKED;
++static rwlock_t ip6ip6_hook_lock = RW_LOCK_UNLOCKED;
++
++/* flag indicating if the module is being removed */
++static int shutdown = 0;
++
++/**
++ * ip6ip6_tnl_lookup - fetch tunnel matching the end-point addresses
++ *   @remote: the address of the tunnel exit-point 
++ *   @local: the address of the tunnel entry-point 
++ *
++ * Return:  
++ *   tunnel matching given end-points if found,
++ *   else fallback tunnel if its device is up, 
++ *   else %NULL
++ **/
++
++struct ip6_tnl *
++ip6ip6_tnl_lookup(struct in6_addr *remote, struct in6_addr *local)
++{
++	unsigned h0 = HASH(remote);
++	unsigned h1 = HASH(local);
++	struct ip6_tnl *t;
++
++	for (t = tnls_r_l[h0 ^ h1]; t; t = t->next) {
++		if (!ipv6_addr_cmp(local, &t->parms.laddr) &&
++		    !ipv6_addr_cmp(remote, &t->parms.raddr) &&
++		    (t->dev->flags & IFF_UP))
++			return t;
++	}
++	if ((t = tnls_wc[0]) != NULL && (t->dev->flags & IFF_UP))
++		return t;
++
++	return NULL;
++}
++
++/**
++ * ip6ip6_bucket - get head of list matching given tunnel parameters
++ *   @p: parameters containing tunnel end-points 
++ *
++ * Description:
++ *   ip6ip6_bucket() returns the head of the list matching the 
++ *   &struct in6_addr entries laddr and raddr in @p.
++ *
++ * Return: head of IPv6 tunnel list 
++ **/
++
++static struct ip6_tnl **
++ip6ip6_bucket(struct ip6_tnl_parm *p)
++{
++	struct in6_addr *remote = &p->raddr;
++	struct in6_addr *local = &p->laddr;
++	unsigned h = 0;
++	int prio = 0;
++
++	if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) {
++		prio = 1;
++		h = HASH(remote) ^ HASH(local);
++	}
++	return &tnls[prio][h];
++}
++
++/**
++ * ip6ip6_kernel_tnl_link - add new kernel tunnel to cache
++ *   @t: kernel tunnel
++ *
++ * Note:
++ *   %IP6_TNL_F_KERNEL_DEV is assumed to be raised in t->parms.flags. 
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information.
++ **/
++
++static inline void
++ip6ip6_kernel_tnl_link(struct ip6_tnl *t)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	t->next = tnls_kernel[0];
++	tnls_kernel[0] = t;
++	kdev_count++;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++}
++
++/**
++ * ip6ip6_kernel_tnl_unlink - remove first kernel tunnel from cache
++ *
++ * Return: first free kernel tunnel
++ *
++ * Note:
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information.
++ **/
++
++static inline struct ip6_tnl *
++ip6ip6_kernel_tnl_unlink(void)
++{
++	struct ip6_tnl *t;
++
++	write_lock_bh(&ip6ip6_kernel_lock);
++	if ((t = tnls_kernel[0]) != NULL) {
++		tnls_kernel[0] = t->next;
++		kdev_count--;
++	}
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	return t;
++}
++
++/**
++ * ip6ip6_tnl_link - add tunnel to hash table
++ *   @t: tunnel to be added
++ **/
++
++static void
++ip6ip6_tnl_link(struct ip6_tnl *t)
++{
++	struct ip6_tnl **tp = ip6ip6_bucket(&t->parms);
++
++	write_lock_bh(&ip6ip6_lock);
++	t->next = *tp;
++	*tp = t;
++	write_unlock_bh(&ip6ip6_lock);
++}
++
++/**
++ * ip6ip6_tnl_unlink - remove tunnel from hash table
++ *   @t: tunnel to be removed
++ **/
++
++static void
++ip6ip6_tnl_unlink(struct ip6_tnl *t)
++{
++	struct ip6_tnl **tp;
++	
++	write_lock_bh(&ip6ip6_lock);
++	for (tp = ip6ip6_bucket(&t->parms); *tp; tp = &(*tp)->next) {
++		if (t == *tp) {
++			*tp = t->next;
++			break;
++		}
++	}
++	write_unlock_bh(&ip6ip6_lock);
++}
++
++/**
++ * ip6ip6_tnl_create() - create a new tunnel
++ *   @p: tunnel parameters
++ *   @pt: pointer to new tunnel
++ *
++ * Description:
++ *   Create tunnel matching given parameters. New kernel managed devices are 
++ *   not put in the normal hash structure, but are instead cached for later
++ *   use.
++ * 
++ * Return: 
++ *   0 on success
++ **/
++
++
++static int __ip6ip6_tnl_create(struct ip6_tnl_parm *p,
++			       struct ip6_tnl **pt,
++			       int kernel_list)
++{
++	struct net_device *dev;
++	int err = -ENOBUFS;
++	struct ip6_tnl *t;
++
++	MOD_INC_USE_COUNT;
++	dev = kmalloc(sizeof (*dev) + sizeof (*t), GFP_KERNEL);
++	if (!dev) {
++		MOD_DEC_USE_COUNT;
++		return err;
++	}
++	memset(dev, 0, sizeof (*dev) + sizeof (*t));
++	dev->priv = (void *) (dev + 1);
++	t = (struct ip6_tnl *) dev->priv;
++	t->dev = dev;
++	dev->init = ip6ip6_tnl_dev_init;
++	dev->features |= NETIF_F_DYNALLOC;
++	if (kernel_list) {
++		memcpy(t->parms.name, p->name, IFNAMSIZ - 1);
++		t->parms.proto = IPPROTO_IPV6;
++		t->parms.flags = IP6_TNL_F_KERNEL_DEV;
++	} else {
++		memcpy(&t->parms, p, sizeof (*p));
++	}
++	t->parms.name[IFNAMSIZ - 1] = '\0';
++	strcpy(dev->name, t->parms.name);
++	if (!dev->name[0]) {
++		int i;
++		for (i = 0; i < IP6_TNL_MAX; i++) {
++			sprintf(dev->name, "ip6tnl%d", i);
++			if (__dev_get_by_name(dev->name) == NULL)
++				break;
++		}
++
++		if (i == IP6_TNL_MAX) {
++			goto failed;
++		}
++		memcpy(t->parms.name, dev->name, IFNAMSIZ);
++	}
++	if ((err = register_netdevice(dev)) < 0) {
++		goto failed;
++	}
++	dev_hold(dev);
++	if (kernel_list) {
++		ip6ip6_kernel_tnl_link(t);
++	} else {
++		ip6ip6_tnl_link(t);
++	}
++	*pt = t;
++	return 0;
++failed:
++	kfree(dev);
++	MOD_DEC_USE_COUNT;
++	return err;
++}
++
++
++int ip6ip6_tnl_create(struct ip6_tnl_parm *p, struct ip6_tnl **pt)
++{
++	return __ip6ip6_tnl_create(p, pt, 0);
++}
++
++
++static void manage_kernel_tnls(void *foo);
++
++static struct tq_struct manager_task = {
++	routine:manage_kernel_tnls,
++	data:NULL
++};
++
++/**
++ * manage_kernel_tnls() - create and destroy kernel tunnels
++ *
++ * Description:
++ *   manage_kernel_tnls() creates new kernel devices if there
++ *   are less than $min_kdev_count of them and deletes old ones if
++ *   there are less than $max_kdev_count of them in the cache
++ *
++ * Note:
++ *   Schedules itself to be run later in process context if called from 
++ *   interrupt. Therefore only works synchronously when called from process 
++ *   context.
++ **/
++
++static void
++manage_kernel_tnls(void *foo)
++{
++	struct ip6_tnl *t = NULL;
++	struct ip6_tnl_parm parm;
++
++	/* We can't do this processing in interrupt 
++	   context so schedule it for later */
++	if (in_interrupt()) {
++		read_lock(&ip6ip6_kernel_lock);
++		if (!shutdown &&
++		    (kdev_count < min_kdev_count ||
++		     kdev_count > max_kdev_count)) {
++			schedule_task(&manager_task);
++		}
++		read_unlock(&ip6ip6_kernel_lock);
++		return;
++	}
++
++	rtnl_lock();
++	read_lock_bh(&ip6ip6_kernel_lock);
++	memset(&parm, 0, sizeof (parm));
++	parm.flags = IP6_TNL_F_KERNEL_DEV;
++	/* Create tunnels until there are at least min_kdev_count */
++	while (kdev_count < min_kdev_count) {
++		read_unlock_bh(&ip6ip6_kernel_lock);
++		if (!__ip6ip6_tnl_create(&parm, &t, 1)) {
++			dev_open(t->dev);
++		} else {
++			goto err;
++		}
++		read_lock_bh(&ip6ip6_kernel_lock);
++	}
++
++	/* Destroy tunnels until there are at most max_kdev_count */
++	while (kdev_count > max_kdev_count) {
++		read_unlock_bh(&ip6ip6_kernel_lock);
++		if ((t = ip6ip6_kernel_tnl_unlink()) != NULL) {
++			unregister_netdevice(t->dev);
++		} else {
++			goto err;
++		}
++		read_lock_bh(&ip6ip6_kernel_lock);
++	}
++	read_unlock_bh(&ip6ip6_kernel_lock);
++err:
++	rtnl_unlock();
++}
++
++/**
++ * ip6ip6_tnl_inc_max_kdev_count() - increase max kernel dev cache size
++ *   @n: size increase
++ * Description:
++ *   Increase the upper limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_inc_max_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	max_kdev_count += n;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return max_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_dec_max_kdev_count() -  decrease max kernel dev cache size
++ *   @n: size decrement
++ * Description:
++ *   Decrease the upper limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_dec_max_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	max_kdev_count -= min(max_kdev_count, n);
++	if (max_kdev_count < min_kdev_count)
++		min_kdev_count = max_kdev_count;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return max_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_inc_min_kdev_count() - increase min kernel dev cache size
++ *   @n: size increase
++ * Description:
++ *   Increase the lower limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_inc_min_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	min_kdev_count += n;
++	if (min_kdev_count > max_kdev_count)
++		max_kdev_count = min_kdev_count;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return min_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_dec_min_kdev_count() -  decrease min kernel dev cache size
++ *   @n: size decrement
++ * Description:
++ *   Decrease the lower limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_dec_min_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	min_kdev_count -= min(min_kdev_count, n);
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return min_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_locate - find or create tunnel matching given parameters
++ *   @p: tunnel parameters 
++ *   @create: != 0 if allowed to create new tunnel if no match found
++ *
++ * Description:
++ *   ip6ip6_tnl_locate() first tries to locate an existing tunnel
++ *   based on @parms. If this is unsuccessful, but @create is set a new
++ *   tunnel device is created and registered for use.
++ *
++ * Return:
++ *   0 if tunnel located or created,
++ *   -EINVAL if parameters incorrect,
++ *   -ENODEV if no matching tunnel available
++ **/
++
++int ip6ip6_tnl_locate(struct ip6_tnl_parm *p, struct ip6_tnl **pt, int create)
++{
++	struct in6_addr *remote = &p->raddr;
++	struct in6_addr *local = &p->laddr;
++	struct ip6_tnl *t;
++
++	if (p->proto != IPPROTO_IPV6)
++		return -EINVAL;
++
++	for (t = *ip6ip6_bucket(p); t; t = t->next) {
++		if (!ipv6_addr_cmp(local, &t->parms.laddr) &&
++		    !ipv6_addr_cmp(remote, &t->parms.raddr)) {
++			*pt = t;
++			return (create ? -EEXIST : 0);
++		}
++	}
++	return ip6ip6_tnl_create(p, pt);
++}
++
++/**
++ * ip6ip6_tnl_dev_destructor - tunnel device destructor
++ *   @dev: the device to be destroyed
++ **/
++
++static void
++ip6ip6_tnl_dev_destructor(struct net_device *dev)
++{
++	if (dev != &ip6ip6_fb_tnl_dev) {
++		MOD_DEC_USE_COUNT;
++	}
++}
++
++/**
++ * ip6ip6_tnl_dev_uninit - tunnel device uninitializer
++ *   @dev: the device to be destroyed
++ *   
++ * Description:
++ *   ip6ip6_tnl_dev_uninit() removes tunnel from its list
++ **/
++
++static void
++ip6ip6_tnl_dev_uninit(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++
++	if (dev == &ip6ip6_fb_tnl_dev) {
++		write_lock_bh(&ip6ip6_lock);
++		tnls_wc[0] = NULL;
++		write_unlock_bh(&ip6ip6_lock);
++	} else {
++		ip6ip6_tnl_unlink(t);
++	}
++	sock_release(t->sock);
++	dev_put(dev);
++}
++
++/**
++ * parse_tvl_tnl_enc_lim - handle encapsulation limit option
++ *   @skb: received socket buffer
++ *
++ * Return: 
++ *   0 if none was found, 
++ *   else index to encapsulation limit
++ **/
++
++static __u16
++parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw)
++{
++	struct ipv6hdr *ipv6h = (struct ipv6hdr *) raw;
++	__u8 nexthdr = ipv6h->nexthdr;
++	__u16 off = sizeof (*ipv6h);
++
++	while (ipv6_ext_hdr(nexthdr) && nexthdr != NEXTHDR_NONE) {
++		__u16 optlen = 0;
++		struct ipv6_opt_hdr *hdr;
++		if (raw + off + sizeof (*hdr) > skb->data &&
++		    !pskb_may_pull(skb, raw - skb->data + off + sizeof (*hdr)))
++			break;
++
++		hdr = (struct ipv6_opt_hdr *) (raw + off);
++		if (nexthdr == NEXTHDR_FRAGMENT) {
++			struct frag_hdr *frag_hdr = (struct frag_hdr *) hdr;
++			if (frag_hdr->frag_off)
++				break;
++			optlen = 8;
++		} else if (nexthdr == NEXTHDR_AUTH) {
++			optlen = (hdr->hdrlen + 2) << 2;
++		} else {
++			optlen = ipv6_optlen(hdr);
++		}
++		if (nexthdr == NEXTHDR_DEST) {
++			__u16 i = off + 2;
++			while (1) {
++				struct ipv6_tlv_tnl_enc_lim *tel;
++
++				/* No more room for encapsulation limit */
++				if (i + sizeof (*tel) > off + optlen)
++					break;
++
++				tel = (struct ipv6_tlv_tnl_enc_lim *) &raw[i];
++				/* return index of option if found and valid */
++				if (tel->type == IPV6_TLV_TNL_ENCAP_LIMIT &&
++				    tel->length == 1)
++					return i;
++				/* else jump to next option */
++				if (tel->type)
++					i += tel->length + 2;
++				else
++					i++;
++			}
++		}
++		nexthdr = hdr->nexthdr;
++		off += optlen;
++	}
++	return 0;
++}
++
++/**
++ * ip6ip6_err - tunnel error handler
++ *
++ * Description:
++ *   ip6ip6_err() should handle errors in the tunnel according
++ *   to the specifications in RFC 2473.
++ **/
++
++void ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
++		   int type, int code, int offset, __u32 info)
++{
++	struct ipv6hdr *ipv6h = (struct ipv6hdr *) skb->data;
++	struct ip6_tnl *t;
++	int rel_msg = 0;
++	int rel_type = ICMPV6_DEST_UNREACH;
++	int rel_code = ICMPV6_ADDR_UNREACH;
++	__u32 rel_info = 0;
++	__u16 len;
++
++	/* If the packet doesn't contain the original IPv6 header we are 
++	   in trouble since we might need the source address for furter 
++	   processing of the error. */
++
++	read_lock(&ip6ip6_lock);
++	if ((t = ip6ip6_tnl_lookup(&ipv6h->daddr, &ipv6h->saddr)) == NULL)
++		goto out;
++
++	switch (type) {
++		__u32 teli;
++		struct ipv6_tlv_tnl_enc_lim *tel;
++		__u32 mtu;
++	case ICMPV6_DEST_UNREACH:
++		if (net_ratelimit())
++			printk(KERN_WARNING
++			       "%s: Path to destination invalid "
++			       "or inactive!\n", t->parms.name);
++		rel_msg = 1;
++		break;
++	case ICMPV6_TIME_EXCEED:
++		if (code == ICMPV6_EXC_HOPLIMIT) {
++			if (net_ratelimit())
++				printk(KERN_WARNING
++				       "%s: Too small hop limit or "
++				       "routing loop in tunnel!\n", 
++				       t->parms.name);
++			rel_msg = 1;
++		}
++		break;
++	case ICMPV6_PARAMPROB:
++		/* ignore if parameter problem not caused by a tunnel
++		   encapsulation limit sub-option */
++		if (code != ICMPV6_HDR_FIELD) {
++			break;
++		}
++		teli = parse_tlv_tnl_enc_lim(skb, skb->data);
++
++		if (teli && teli == ntohl(info) - 2) {
++			tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli];
++			if (tel->encap_limit == 0) {
++				if (net_ratelimit())
++					printk(KERN_WARNING
++					       "%s: Too small encapsulation "
++					       "limit or routing loop in "
++					       "tunnel!\n", t->parms.name);
++				rel_msg = 1;
++			}
++		}
++		break;
++	case ICMPV6_PKT_TOOBIG:
++		mtu = ntohl(info) - offset;
++		if (mtu < IPV6_MIN_MTU)
++			mtu = IPV6_MIN_MTU;
++		t->dev->mtu = mtu;
++
++		if ((len = sizeof (*ipv6h) + ipv6h->payload_len) > mtu) {
++			rel_type = ICMPV6_PKT_TOOBIG;
++			rel_code = 0;
++			rel_info = mtu;
++			rel_msg = 1;
++		}
++		break;
++	}
++	if (rel_msg && pskb_may_pull(skb, offset + sizeof (*ipv6h))) {
++		struct rt6_info *rt;
++		struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
++		if (!skb2)
++			goto out;
++
++		dst_release(skb2->dst);
++		skb2->dst = NULL;
++		skb_pull(skb2, offset);
++		skb2->nh.raw = skb2->data;
++
++		/* Try to guess incoming interface */
++		rt = rt6_lookup(&skb2->nh.ipv6h->saddr, NULL, 0, 0);
++
++		if (rt && rt->rt6i_dev)
++			skb2->dev = rt->rt6i_dev;
++
++		icmpv6_send(skb2, rel_type, rel_code, rel_info, skb2->dev);
++
++		if (rt)
++			dst_release(&rt->u.dst);
++
++		kfree_skb(skb2);
++	}
++out:
++	read_unlock(&ip6ip6_lock);
++}
++
++/**
++ * call_hooks - call ipv6 tunnel hooks
++ *   @hooknum: hook number, either %IP6_TNL_PRE_ENCAP, or 
++ *   %IP6_TNL_PRE_DECAP
++ *   @t: the current tunnel
++ *   @skb: the tunneled packet
++ *
++ * Description:
++ *   Pass packet to all the hook functions until %IP6_TNL_DROP
++ *
++ * Return:
++ *   %IP6_TNL_ACCEPT or %IP6_TNL_DROP
++ **/
++
++static inline int
++call_hooks(unsigned int hooknum, struct ip6_tnl *t, struct sk_buff *skb)
++{
++	struct ip6_tnl_hook_ops *h;
++	int accept = IP6_TNL_ACCEPT;
++
++	if (hooknum < IP6_TNL_MAXHOOKS) {
++		struct list_head *i;
++		read_lock(&ip6ip6_hook_lock);
++		for (i = hooks[hooknum].next; i != &hooks[hooknum]; i = i->next) {
++			h = (struct ip6_tnl_hook_ops *) i;
++
++			if (h->hook) {
++				accept = h->hook(t, skb);
++
++				if (accept != IP6_TNL_ACCEPT)
++					break;
++			}
++		}
++		read_unlock(&ip6ip6_hook_lock);
++	}
++	return accept;
++}
++
++/**
++ * ip6ip6_rcv - decapsulate IPv6 packet and retransmit it locally
++ *   @skb: received socket buffer
++ *
++ * Return: 0
++ **/
++
++int ip6ip6_rcv(struct sk_buff *skb)
++{
++	struct ipv6hdr *ipv6h;
++	struct ip6_tnl *t;
++
++	if (!pskb_may_pull(skb, sizeof (*ipv6h)))
++		goto discard;
++
++	ipv6h = skb->nh.ipv6h;
++
++	read_lock(&ip6ip6_lock);
++
++	if ((t = ip6ip6_tnl_lookup(&ipv6h->saddr, &ipv6h->daddr)) != NULL) {
++		if (!(t->parms.flags & IP6_TNL_F_CAP_RCV) ||
++		    call_hooks(IP6_TNL_PRE_DECAP, t, skb) != IP6_TNL_ACCEPT) {
++			t->stat.rx_dropped++;
++			read_unlock(&ip6ip6_lock);
++			goto discard;
++		}
++		skb->mac.raw = skb->nh.raw;
++		skb->nh.raw = skb->data;
++		skb->protocol = htons(ETH_P_IPV6);
++		skb->pkt_type = PACKET_HOST;
++		memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
++		skb->dev = t->dev;
++		dst_release(skb->dst);
++		skb->dst = NULL;
++		t->stat.rx_packets++;
++		t->stat.rx_bytes += skb->len;
++		netif_rx(skb);
++		read_unlock(&ip6ip6_lock);
++		return 0;
++	}
++	read_unlock(&ip6ip6_lock);
++	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev);
++discard:
++	kfree_skb(skb);
++	return 0;
++}
++
++static inline struct ipv6_txoptions *create_tel(__u8 encap_limit)
++{
++	struct ipv6_tlv_tnl_enc_lim *tel;
++	struct ipv6_txoptions *opt;
++	__u8 *raw;
++
++	int opt_len = sizeof(*opt) + IPV6_TLV_TEL_DST_SIZE;
++
++	if (!(opt = kmalloc(opt_len, GFP_ATOMIC))) {
++		return NULL;
++	}
++	memset(opt, 0, opt_len);
++	opt->tot_len = opt_len;
++	opt->dst0opt = (struct ipv6_opt_hdr *) (opt + 1);
++	opt->opt_nflen = 8;
++
++	tel = (struct ipv6_tlv_tnl_enc_lim *) (opt->dst0opt + 1);
++	tel->type = IPV6_TLV_TNL_ENCAP_LIMIT;
++	tel->length = 1;
++	tel->encap_limit = encap_limit;
++
++	raw = (__u8 *) opt->dst0opt;
++	raw[5] = IPV6_TLV_PADN;
++	raw[6] = 1;
++
++	return opt;
++}
++
++static int
++ip6ip6_getfrag(const void *data, struct in6_addr *addr,
++		  char *buff, unsigned int offset, unsigned int len)
++{
++	memcpy(buff, data + offset, len);
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_addr_conflict - compare packet addresses to tunnel's own
++ *   @t: the outgoing tunnel device
++ *   @hdr: IPv6 header from the incoming packet 
++ *
++ * Description:
++ *   Avoid trivial tunneling loop by checking that tunnel exit-point 
++ *   doesn't match source of incoming packet.
++ *
++ * Return: 
++ *   1 if conflict,
++ *   0 else
++ **/
++
++static inline int
++ip6ip6_tnl_addr_conflict(struct ip6_tnl *t, struct ipv6hdr *hdr)
++{
++	return !ipv6_addr_cmp(&t->parms.raddr, &hdr->saddr);
++}
++
++/**
++ * ip6ip6_tnl_xmit - encapsulate packet and send 
++ *   @skb: the outgoing socket buffer
++ *   @dev: the outgoing tunnel device 
++ *
++ * Description:
++ *   Build new header and do some sanity checks on the packet before sending
++ *   it to ip6_build_xmit().
++ *
++ * Return: 
++ *   0
++ **/
++
++int ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++	struct net_device_stats *stats = &t->stat;
++	struct ipv6hdr *ipv6h = skb->nh.ipv6h;
++	struct ipv6_txoptions *opt = NULL;
++	int encap_limit = -1;
++	__u16 offset;
++	struct flowi fl;
++	int err = 0;
++	struct dst_entry *dst;
++	struct sock *sk = t->sock->sk;
++	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
++	int mtu;
++
++	if (t->recursion++) {
++		stats->collisions++;
++		goto tx_err;
++	}
++	if (skb->protocol != htons(ETH_P_IPV6) ||
++	    !(t->parms.flags & IP6_TNL_F_CAP_XMIT) ||
++	    ip6ip6_tnl_addr_conflict(t, ipv6h)) {
++		goto tx_err;
++	}
++	if ((offset = parse_tlv_tnl_enc_lim(skb, skb->nh.raw)) > 0) {
++		struct ipv6_tlv_tnl_enc_lim *tel;
++		tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->nh.raw[offset];
++		if (tel->encap_limit == 0) {
++			icmpv6_send(skb, ICMPV6_PARAMPROB,
++				    ICMPV6_HDR_FIELD, offset + 2, skb->dev);
++			goto tx_err;
++		}
++		encap_limit = tel->encap_limit - 1;
++	} else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) {
++		encap_limit = t->parms.encap_limit;
++	}
++	if (call_hooks(IP6_TNL_PRE_ENCAP, t, skb) != IP6_TNL_ACCEPT)
++		goto discard;
++	memcpy(&fl, &t->fl, sizeof (fl));
++
++	if ((t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS))
++		fl.fl6_flowlabel |= (*(__u32 *) ipv6h & IPV6_TCLASS_MASK);
++	if ((t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL))
++		fl.fl6_flowlabel |= (*(__u32 *) ipv6h & IPV6_FLOWLABEL_MASK);
++
++	if (encap_limit >= 0 && (opt = create_tel(encap_limit)) == NULL)
++		goto tx_err;
++
++	dst = __sk_dst_check(sk, np->dst_cookie);
++
++	if (dst) {
++		if (np->daddr_cache == NULL ||
++		    ipv6_addr_cmp(fl.fl6_dst, np->daddr_cache) ||
++#ifdef CONFIG_IPV6_SUBTREES
++		    np->saddr_cache == NULL ||
++		    ipv6_addr_cmp(fl.fl6_src, np->saddr_cache) ||
++#endif
++		    (fl.oif && fl.oif != dst->dev->ifindex)) {
++			dst = NULL;
++		} else {
++			dst_hold(dst);
++		}
++	}
++	if (dst == NULL) {
++		dst = ip6_route_output(sk, &fl);
++		if (dst->error) {
++			stats->tx_carrier_errors++;
++			dst_link_failure(skb);
++			goto tx_err_dst_release;
++		}
++		/* local routing loop */
++		if (dst->dev == dev) {
++			stats->collisions++;
++			if (net_ratelimit())
++				printk(KERN_WARNING 
++				       "%s: Local routing loop detected!\n",
++				       t->parms.name);
++			goto tx_err_dst_release;
++		}
++	}
++	mtu = dst->pmtu - sizeof (*ipv6h);
++	if (opt) {
++		mtu -= (opt->opt_nflen + opt->opt_flen);
++	}
++	if (mtu < IPV6_MIN_MTU)
++		mtu = IPV6_MIN_MTU;
++	if (skb->dst && mtu < skb->dst->pmtu) {
++		struct rt6_info *rt = (struct rt6_info *) skb->dst;
++		rt->rt6i_flags |= RTF_MODIFIED;
++		rt->u.dst.pmtu = mtu;
++	}
++	if (skb->len > mtu) {
++		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev);
++		goto tx_err_dst_release;
++	}
++	ip6_dst_store(sk, dst, &np->daddr, &np->saddr);
++	err = ip6_build_xmit(sk, ip6ip6_getfrag, (void *) skb->nh.raw,
++			     &fl, skb->len, opt, t->parms.hop_limit,
++			     MSG_DONTWAIT);
++
++	if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) {
++		stats->tx_bytes += skb->len;
++		stats->tx_packets++;
++	} else {
++		stats->tx_errors++;
++		stats->tx_aborted_errors++;
++	}
++	if (opt)
++		kfree(opt);
++	kfree_skb(skb);
++	t->recursion--;
++	return 0;
++tx_err_dst_release:
++	dst_release(dst);
++	if (opt)
++		kfree(opt);
++tx_err:
++	stats->tx_errors++;
++discard:
++	stats->tx_dropped++;
++	kfree_skb(skb);
++	t->recursion--;
++	return 0;
++}
++
++static void ip6_tnl_set_cap(struct ip6_tnl *t)
++{
++	struct ip6_tnl_parm *p = &t->parms;
++	struct in6_addr *laddr = &p->laddr;
++	struct in6_addr *raddr = &p->raddr;
++	int ltype = ipv6_addr_type(laddr);
++	int rtype = ipv6_addr_type(raddr);
++
++	p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV);
++
++	if (ltype != IPV6_ADDR_ANY && rtype != IPV6_ADDR_ANY &&
++	    ((ltype|rtype) &
++	     (IPV6_ADDR_UNICAST|
++	      IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL|
++	      IPV6_ADDR_MAPPED|IPV6_ADDR_RESERVED)) == IPV6_ADDR_UNICAST) {
++		struct net_device *ldev = NULL;
++		int l_ok = 1;
++		int r_ok = 1;
++
++		if (p->link)
++			ldev = dev_get_by_index(p->link);
++
++		if ((ltype&IPV6_ADDR_UNICAST) && !ipv6_chk_addr(laddr, ldev))
++			l_ok = 0;
++
++		if ((rtype&IPV6_ADDR_UNICAST) && ipv6_chk_addr(raddr, NULL))
++			r_ok = 0;
++
++		if (l_ok && r_ok) {
++			if (ltype&IPV6_ADDR_UNICAST)
++				p->flags |= IP6_TNL_F_CAP_XMIT;
++			if (rtype&IPV6_ADDR_UNICAST)
++				p->flags |= IP6_TNL_F_CAP_RCV;
++ 		}
++		if (ldev)
++			dev_put(ldev);
++ 	}
++}
++
++static void ip6ip6_tnl_link_config(struct ip6_tnl *t)
++{
++	struct net_device *dev = t->dev;
++	struct ip6_tnl_parm *p = &t->parms;
++	struct flowi *fl = &t->fl;
++
++	/* Set up flowi template */
++	fl->fl6_src = &p->laddr;
++	fl->fl6_dst = &p->raddr;
++	fl->oif = p->link;
++	fl->fl6_flowlabel = 0;
++
++	if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS))
++		fl->fl6_flowlabel |= IPV6_TCLASS_MASK & htonl(p->flowinfo);
++	if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL))
++		fl->fl6_flowlabel |= IPV6_FLOWLABEL_MASK & htonl(p->flowinfo);
++
++	ip6_tnl_set_cap(t);
++
++	if (p->flags&IP6_TNL_F_CAP_XMIT && p->flags&IP6_TNL_F_CAP_RCV)
++		dev->flags |= IFF_POINTOPOINT;
++	else
++		dev->flags &= ~IFF_POINTOPOINT;
++
++	if (p->flags & IP6_TNL_F_CAP_XMIT) {
++		struct rt6_info *rt = rt6_lookup(&p->raddr, &p->laddr,
++						 p->link, 0);
++		
++		if (rt == NULL)
++			return;
++		
++		if (rt->rt6i_dev) {
++			dev->iflink = rt->rt6i_dev->ifindex;
++
++			dev->hard_header_len = rt->rt6i_dev->hard_header_len +
++				sizeof (struct ipv6hdr);
++
++			dev->mtu = rt->rt6i_dev->mtu - sizeof (struct ipv6hdr);
++
++			if (dev->mtu < IPV6_MIN_MTU)
++				dev->mtu = IPV6_MIN_MTU;
++		}
++		dst_release(&rt->u.dst);
++	}
++}
++
++/**
++ * __ip6ip6_tnl_change - update the tunnel parameters
++ *   @t: tunnel to be changed
++ *   @p: tunnel configuration parameters
++ *
++ * Description:
++ *   __ip6ip6_tnl_change() updates the tunnel parameters
++ **/
++
++static void
++__ip6ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p)
++{
++	ipv6_addr_copy(&t->parms.laddr, &p->laddr);
++	ipv6_addr_copy(&t->parms.raddr, &p->raddr);
++	t->parms.flags = p->flags;
++	t->parms.hop_limit = p->hop_limit;
++	t->parms.encap_limit = p->encap_limit;
++	t->parms.flowinfo = p->flowinfo;
++	ip6ip6_tnl_link_config(t);
++}
++
++void ip6ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p)
++{
++	ip6ip6_tnl_unlink(t);
++	__ip6ip6_tnl_change(t, p);
++	ip6ip6_tnl_link(t);
++}
++
++/**
++ * ip6ip6_kernel_tnl_add - configure and add kernel tunnel to hash 
++ *   @p: kernel tunnel configuration parameters
++ *
++ * Description:
++ *   ip6ip6_kernel_tnl_add() fetches an unused kernel tunnel configures
++ *   it according to @p and places it among the active tunnels.
++ * 
++ * Return:
++ *   number of references to tunnel on success,
++ *   %-EEXIST if there is already a device matching description
++ *   %-EINVAL if p->flags doesn't have %IP6_TNL_F_KERNEL_DEV raised,
++ *   %-ENODEV if there are no unused kernel tunnels available 
++ * 
++ * Note:
++ *   The code for creating, opening, closing and destroying network devices
++ *   must be called from process context, while the Mobile IP code, which 
++ *   needs the tunnel devices, unfortunately runs in interrupt context. 
++ *   
++ *   The devices must be created and opened in advance, then placed in a 
++ *   list where the kernel can fetch and ready them for use at a later time.
++ *
++ **/
++
++int
++ip6ip6_kernel_tnl_add(struct ip6_tnl_parm *p)
++{
++	struct ip6_tnl *t;
++
++	if (!(p->flags & IP6_TNL_F_KERNEL_DEV))
++		return -EINVAL;
++	if ((t = ip6ip6_tnl_lookup(&p->raddr, &p->laddr)) != NULL &&
++	    t != &ip6ip6_fb_tnl) {
++		/* Handle duplicate tunnels by incrementing 
++		   reference count */
++		atomic_inc(&t->refcnt);
++		goto out;
++	}
++	if ((t = ip6ip6_kernel_tnl_unlink()) == NULL)
++		return -ENODEV;
++	__ip6ip6_tnl_change(t, p);
++
++	atomic_inc(&t->refcnt);
++
++	ip6ip6_tnl_link(t);
++
++	manage_kernel_tnls(NULL);
++out:
++	return atomic_read(&t->refcnt);
++}
++
++/**
++ * ip6ip6_kernel_tnl_del - delete no longer needed kernel tunnel 
++ *   @t: kernel tunnel to be removed from hash
++ *
++ * Description:
++ *   ip6ip6_kernel_tnl_del() removes and deconfigures the tunnel @t
++ *   and places it among the unused kernel devices.
++ * 
++ * Return:
++ *   number of references on success,
++ *   %-EINVAL if p->flags doesn't have %IP6_TNL_F_KERNEL_DEV raised,
++ * 
++ * Note:
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information.
++ **/
++
++int
++ip6ip6_kernel_tnl_del(struct ip6_tnl *t)
++{
++	if (!t)
++		return -ENODEV;
++
++	if (!(t->parms.flags & IP6_TNL_F_KERNEL_DEV))
++		return -EINVAL;
++
++	if (atomic_dec_and_test(&t->refcnt)) {
++		struct ip6_tnl_parm p;
++		ip6ip6_tnl_unlink(t);
++		memset(&p, 0, sizeof (p));
++		p.flags = IP6_TNL_F_KERNEL_DEV;
++
++		__ip6ip6_tnl_change(t, &p);
++
++		ip6ip6_kernel_tnl_link(t);
++
++		manage_kernel_tnls(NULL);
++	}
++	return atomic_read(&t->refcnt);
++}
++
++/**
++ * ip6ip6_tnl_ioctl - configure ipv6 tunnels from userspace 
++ *   @dev: virtual device associated with tunnel
++ *   @ifr: parameters passed from userspace
++ *   @cmd: command to be performed
++ *
++ * Description:
++ *   ip6ip6_tnl_ioctl() is used for managing IPv6 tunnels 
++ *   from userspace. 
++ *
++ *   The possible commands are the following:
++ *     %SIOCGETTUNNEL: get tunnel parameters for device
++ *     %SIOCADDTUNNEL: add tunnel matching given tunnel parameters
++ *     %SIOCCHGTUNNEL: change tunnel parameters to those given
++ *     %SIOCDELTUNNEL: delete tunnel
++ *
++ *   The fallback device "ip6tnl0", created during module 
++ *   initialization, can be used for creating other tunnel devices.
++ *
++ * Return:
++ *   0 on success,
++ *   %-EFAULT if unable to copy data to or from userspace,
++ *   %-EPERM if current process hasn't %CAP_NET_ADMIN set or attempting
++ *   to configure kernel devices from userspace, 
++ *   %-EINVAL if passed tunnel parameters are invalid,
++ *   %-EEXIST if changing a tunnel's parameters would cause a conflict
++ *   %-ENODEV if attempting to change or delete a nonexisting device
++ *
++ * Note:
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information 
++ *   about kernel tunnels.
++ * **/
++
++static int
++ip6ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
++{
++	int err = 0;
++	int create;
++	struct ip6_tnl_parm p;
++	struct ip6_tnl *t = NULL;
++
++	MOD_INC_USE_COUNT;
++
++	switch (cmd) {
++	case SIOCGETTUNNEL:
++		if (dev == &ip6ip6_fb_tnl_dev) {
++			if (copy_from_user(&p,
++					   ifr->ifr_ifru.ifru_data,
++					   sizeof (p))) {
++				err = -EFAULT;
++				break;
++			}
++			if ((err = ip6ip6_tnl_locate(&p, &t, 0)) == -ENODEV)
++				t = (struct ip6_tnl *) dev->priv;
++			else if (err)
++				break;
++		} else
++			t = (struct ip6_tnl *) dev->priv;
++
++		memcpy(&p, &t->parms, sizeof (p));
++		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
++			err = -EFAULT;
++		}
++		break;
++	case SIOCADDTUNNEL:
++	case SIOCCHGTUNNEL:
++		err = -EPERM;
++		create = (cmd == SIOCADDTUNNEL);
++		if (!capable(CAP_NET_ADMIN))
++			break;
++		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
++			err = -EFAULT;
++			break;
++		}
++		if (p.flags & IP6_TNL_F_KERNEL_DEV) {
++			break;
++		}
++		if (!create && dev != &ip6ip6_fb_tnl_dev) {
++			t = (struct ip6_tnl *) dev->priv;
++		}
++		if (!t && (err = ip6ip6_tnl_locate(&p, &t, create))) {
++			break;
++		}
++		if (cmd == SIOCCHGTUNNEL) {
++			if (t->dev != dev) {
++				err = -EEXIST;
++				break;
++			}
++			if (t->parms.flags & IP6_TNL_F_KERNEL_DEV) {
++				err = -EPERM;
++				break;
++			}
++			ip6ip6_tnl_change(t, &p);
++			netdev_state_change(dev);
++		}
++		if (copy_to_user(ifr->ifr_ifru.ifru_data,
++				 &t->parms, sizeof (p))) {
++			err = -EFAULT;
++		} else {
++			err = 0;
++		}
++		break;
++	case SIOCDELTUNNEL:
++		err = -EPERM;
++		if (!capable(CAP_NET_ADMIN))
++			break;
++
++		if (dev == &ip6ip6_fb_tnl_dev) {
++			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data,
++					   sizeof (p))) {
++				err = -EFAULT;
++				break;
++			}
++			err = ip6ip6_tnl_locate(&p, &t, 0);
++			if (err)
++				break;
++			if (t == &ip6ip6_fb_tnl) {
++				err = -EPERM;
++				break;
++			}
++		} else {
++			t = (struct ip6_tnl *) dev->priv;
++		}
++		if (t->parms.flags & IP6_TNL_F_KERNEL_DEV)
++			err = -EPERM;
++		else
++			err = unregister_netdevice(t->dev);
++		break;
++	default:
++		err = -EINVAL;
++	}
++	MOD_DEC_USE_COUNT;
++	return err;
++}
++
++/**
++ * ip6ip6_tnl_get_stats - return the stats for tunnel device 
++ *   @dev: virtual device associated with tunnel
++ *
++ * Return: stats for device
++ **/
++
++static struct net_device_stats *
++ip6ip6_tnl_get_stats(struct net_device *dev)
++{
++	return &(((struct ip6_tnl *) dev->priv)->stat);
++}
++
++/**
++ * ip6ip6_tnl_change_mtu - change mtu manually for tunnel device
++ *   @dev: virtual device associated with tunnel
++ *   @new_mtu: the new mtu
++ *
++ * Return:
++ *   0 on success,
++ *   %-EINVAL if mtu too small
++ **/
++
++static int
++ip6ip6_tnl_change_mtu(struct net_device *dev, int new_mtu)
++{
++	if (new_mtu < IPV6_MIN_MTU) {
++		return -EINVAL;
++	}
++	dev->mtu = new_mtu;
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_dev_init_gen - general initializer for all tunnel devices
++ *   @dev: virtual device associated with tunnel
++ *
++ * Description:
++ *   Set function pointers and initialize the &struct flowi template used
++ *   by the tunnel.
++ **/
++
++static int
++ip6ip6_tnl_dev_init_gen(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++	struct flowi *fl = &t->fl;
++	int err;
++	struct sock *sk;
++
++	if ((err = sock_create(PF_INET6, SOCK_RAW, IPPROTO_IPV6, &t->sock))) {
++		printk(KERN_ERR
++		       "Failed to create IPv6 tunnel socket (err %d).\n", err);
++		return err;
++	}
++	t->sock->inode->i_uid = 0;
++	t->sock->inode->i_gid = 0;
++
++	sk = t->sock->sk;
++	sk->allocation = GFP_ATOMIC;
++	sk->net_pinfo.af_inet6.hop_limit = 254;
++	sk->net_pinfo.af_inet6.mc_loop = 0;
++	sk->prot->unhash(sk);
++
++	memset(fl, 0, sizeof (*fl));
++	fl->proto = IPPROTO_IPV6;
++
++	dev->destructor = ip6ip6_tnl_dev_destructor;
++	dev->uninit = ip6ip6_tnl_dev_uninit;
++	dev->hard_start_xmit = ip6ip6_tnl_xmit;
++	dev->get_stats = ip6ip6_tnl_get_stats;
++	dev->do_ioctl = ip6ip6_tnl_ioctl;
++	dev->change_mtu = ip6ip6_tnl_change_mtu;
++
++	dev->type = ARPHRD_TUNNEL6;
++	dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr);
++	dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr);
++	dev->flags |= IFF_NOARP;
++	dev->iflink = 0;
++	/* Hmm... MAX_ADDR_LEN is 8, so the ipv6 addresses can't be 
++	   copied to dev->dev_addr and dev->broadcast, like the ipv4
++	   addresses were in ipip.c, ip_gre.c and sit.c. */
++	dev->addr_len = 0;
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_dev_init - initializer for all non fallback tunnel devices
++ *   @dev: virtual device associated with tunnel
++ **/
++
++static int
++ip6ip6_tnl_dev_init(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++	ip6ip6_tnl_dev_init_gen(dev);
++	ip6ip6_tnl_link_config(t);
++	return 0;
++}
++
++#ifdef MODULE
++
++/**
++ * ip6ip6_fb_tnl_open - function called when fallback device opened
++ *   @dev: fallback device
++ *
++ * Return: 0 
++ **/
++
++static int
++ip6ip6_fb_tnl_open(struct net_device *dev)
++{
++	MOD_INC_USE_COUNT;
++	return 0;
++}
++
++/**
++ * ip6ip6_fb_tnl_close - function called when fallback device closed
++ *   @dev: fallback device
++ *
++ * Return: 0 
++ **/
++
++static int
++ip6ip6_fb_tnl_close(struct net_device *dev)
++{
++	MOD_DEC_USE_COUNT;
++	return 0;
++}
++#endif
++
++/**
++ * ip6ip6_fb_tnl_dev_init - initializer for fallback tunnel device
++ *   @dev: fallback device
++ *
++ * Return: 0
++ **/
++
++int __init
++ip6ip6_fb_tnl_dev_init(struct net_device *dev)
++{
++	ip6ip6_tnl_dev_init_gen(dev);
++#ifdef MODULE
++	dev->open = ip6ip6_fb_tnl_open;
++	dev->stop = ip6ip6_fb_tnl_close;
++#endif
++	dev_hold(dev);
++	tnls_wc[0] = &ip6ip6_fb_tnl;
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_register_hook - add hook for processing of tunneled packets
++ *   @reg: hook function and its parameters
++ * 
++ * Description:
++ *   Add a netfilter like hook function for special handling of tunneled 
++ *   packets. The hook functions are called before encapsulation 
++ *   (%IP6_TNL_PRE_ENCAP) and before decapsulation 
++ *   (%IP6_TNL_PRE_DECAP). The possible return values by the hook 
++ *   functions are %IP6_TNL_DROP, %IP6_TNL_ACCEPT and 
++ *   %IP6_TNL_STOLEN (in case the hook function took care of the packet
++ *   and it doesn't have to be processed any further).
++ **/
++
++void
++ip6ip6_tnl_register_hook(struct ip6_tnl_hook_ops *reg)
++{
++	if (reg->hooknum < IP6_TNL_MAXHOOKS) {
++		struct list_head *i;
++
++		write_lock_bh(&ip6ip6_hook_lock);
++		for (i = hooks[reg->hooknum].next;
++		     i != &hooks[reg->hooknum]; i = i->next) {
++			if (reg->priority <
++			    ((struct ip6_tnl_hook_ops *) i)->priority) {
++				break;
++			}
++		}
++		list_add(&reg->list, i->prev);
++		write_unlock_bh(&ip6ip6_hook_lock);
++	}
++}
++
++/**
++ * ip6ip6_tnl_unregister_hook - remove tunnel hook
++ *   @reg: hook function and its parameters
++ **/
++
++void
++ip6ip6_tnl_unregister_hook(struct ip6_tnl_hook_ops *reg)
++{
++	if (reg->hooknum < IP6_TNL_MAXHOOKS) {
++		write_lock_bh(&ip6ip6_hook_lock);
++		list_del(&reg->list);
++		write_unlock_bh(&ip6ip6_hook_lock);
++	}
++}
++
++
++/* the IPv6 over IPv6 protocol structure */
++static struct inet6_protocol ip6ip6_protocol = {
++	ip6ip6_rcv,		/* IPv6 handler         */
++	ip6ip6_err,		/* IPv6 error control   */
++	NULL,			/* next                 */
++	IPPROTO_IPV6,		/* protocol ID          */
++	0,			/* copy                 */
++	NULL,			/* data                 */
++	"IPv6 over IPv6"	/* name                 */
++};
++
++/**
++ * ip6_tunnel_init - register protocol and reserve needed resources
++ *
++ * Return: 0 on success
++ **/
++
++int __init ip6_tunnel_init(void)
++{
++	int i, err;
++
++	ip6ip6_fb_tnl_dev.priv = (void *) &ip6ip6_fb_tnl;
++
++	for (i = 0; i < IP6_TNL_MAXHOOKS; i++) {
++		INIT_LIST_HEAD(&hooks[i]);
++	}
++	if ((err = register_netdev(&ip6ip6_fb_tnl_dev)))
++		return err;
++
++	inet6_add_protocol(&ip6ip6_protocol);
++	return 0;
++}
++
++/**
++ * ip6_tunnel_cleanup - free resources and unregister protocol
++ **/
++
++void ip6_tunnel_cleanup(void)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	shutdown = 1;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	flush_scheduled_tasks();
++	manage_kernel_tnls(NULL);
++	inet6_del_protocol(&ip6ip6_protocol);
++	unregister_netdev(&ip6ip6_fb_tnl_dev);
++}
++
++#ifdef MODULE
++module_init(ip6_tunnel_init);
++module_exit(ip6_tunnel_cleanup);
++#endif
++
++#if defined(CONFIG_IPV6_MOBILITY_HA_MODULE) || defined(CONFIG_IPV6_MOBILITY_MN_MODULE)
++EXPORT_SYMBOL(ip6ip6_tnl_register_hook);
++EXPORT_SYMBOL(ip6ip6_tnl_unregister_hook);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_HA_MODULE
++EXPORT_SYMBOL(ip6ip6_tnl_dec_max_kdev_count);
++EXPORT_SYMBOL(ip6ip6_tnl_inc_max_kdev_count);
++EXPORT_SYMBOL(ip6ip6_tnl_dec_min_kdev_count);
++EXPORT_SYMBOL(ip6ip6_tnl_inc_min_kdev_count);
++EXPORT_SYMBOL(ip6ip6_kernel_tnl_add);
++EXPORT_SYMBOL(ip6ip6_kernel_tnl_del);
++EXPORT_SYMBOL(ip6ip6_tnl_lookup);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_MN_MODULE
++EXPORT_SYMBOL(ip6ip6_tnl_create);
++EXPORT_SYMBOL(ip6ip6_tnl_change);
++#endif
++
+diff -uprN linux-2.4.25.old/net/ipv6/mipglue.c linux-2.4.25/net/ipv6/mipglue.c
+--- linux-2.4.25.old/net/ipv6/mipglue.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mipglue.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,63 @@
++/*
++ *	Glue for Mobility support integration to IPv6
++ *
++ *	Authors:
++ *	Antti Tuominen		<ajtuomin@cc.hut.fi>	
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/sched.h>
++
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/neighbour.h>
++#include <net/mipglue.h>
++
++extern int ip6_tlvopt_unknown(struct sk_buff *skb, int optoff);
++
++/*  Initialize all zero  */
++struct mipv6_callable_functions mipv6_functions = { NULL };
++
++/* Sets mipv6_functions struct to zero to invalidate all successive
++ * calls to mipv6 functions. Used on module unload. */
++
++void mipv6_invalidate_calls(void)
++{
++	memset(&mipv6_functions, 0, sizeof(mipv6_functions));
++}
++
++
++/* Selects correct handler for tlv encoded destination option. Called
++ * by ip6_parse_tlv. Checks if mipv6 calls are valid before calling. */
++
++int mipv6_handle_dstopt(struct sk_buff *skb, int optoff)
++{
++	int ret;
++
++        switch (skb->nh.raw[optoff]) {
++	case MIPV6_TLV_HOMEADDR: 
++		ret = MIPV6_CALLFUNC(mipv6_handle_homeaddr, 0)(skb, optoff);
++		break;
++	default:
++		/* Should never happen */
++		printk(KERN_ERR __FILE__ ": Invalid destination option code (%d)\n",
++		       skb->nh.raw[optoff]);
++		ret = 1;
++		break;
++	}
++
++	/* If mipv6 handlers are not valid, pass the packet to
++         * ip6_tlvopt_unknown() for correct handling. */
++	if (!ret)
++		return ip6_tlvopt_unknown(skb, optoff);
++
++	return ret;
++}
++
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/Config.in linux-2.4.25/net/ipv6/mobile_ip6/Config.in
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/Config.in	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/Config.in	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,12 @@
++#
++# Mobile IPv6 Configuration
++#
++dep_tristate '    IPv6: Mobility Support (Correspondent Node)' CONFIG_IPV6_MOBILITY $CONFIG_IPV6
++if [ "$CONFIG_IPV6_IPV6_TUNNEL" != "n" ]; then
++   dep_tristate '      MIPv6: Mobile Node Support' CONFIG_IPV6_MOBILITY_MN $CONFIG_IPV6_MOBILITY
++
++   dep_tristate '      MIPv6: Home Agent Support' CONFIG_IPV6_MOBILITY_HA $CONFIG_IPV6_MOBILITY
++fi
++if [ "$CONFIG_IPV6_MOBILITY" != "n" ]; then
++   bool '      MIPv6: Debug messages' CONFIG_IPV6_MOBILITY_DEBUG
++fi
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/Makefile linux-2.4.25/net/ipv6/mobile_ip6/Makefile
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/Makefile	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/Makefile	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,35 @@
++#
++# Makefile for the MIPL Mobile IPv6 for Linux.
++#
++# Note! Dependencies are done automagically by 'make dep', which also
++# removes any old dependencies. DON'T put your own dependencies here
++# unless it's something special (ie not a .c file).
++#
++
++
++O_TARGET := mip6_base.o
++
++list-multi := mip6_ha.o mip6_mn.o
++
++obj-y := hashlist.o bcache.o mobhdr_common.o stats.o exthdrs.o \
++	rr_crypto.o hmac.o auth_opt.o mipv6_icmp.o module_cn.o
++
++obj-m := $(O_TARGET)
++
++mip6_ha-objs := halist.o mipv6_icmp_ha.o tunnel_ha.o \
++		ndisc_ha.o ha.o module_ha.o
++
++mip6_mn-objs := mipv6_icmp_mn.o ioctl_mn.o tunnel_mn.o \
++		mdetect.o bul.o multiaccess_ctl.o mobhdr_mn.o mn.o \
++		module_mn.o 
++
++obj-$(CONFIG_IPV6_MOBILITY_HA) += mip6_ha.o
++obj-$(CONFIG_IPV6_MOBILITY_MN) += mip6_mn.o
++
++include $(TOPDIR)/Rules.make
++
++mip6_ha.o: $(mip6_ha-objs)
++	$(LD) -r -o $@ $(mip6_ha-objs)
++
++mip6_mn.o: $(mip6_mn-objs)
++	$(LD) -r -o $@ $(mip6_mn-objs)
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/README linux-2.4.25/net/ipv6/mobile_ip6/README
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/README	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/README	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,15 @@
++MIPL Mobile IPv6 for Linux
++
++More information at http://www.mipl.mediapoli.com/.
++
++To join MIPL Mobile IPv6 for Linux mailing lists go to:
++
++	http://www.mipl.mediapoli.com/cgi-bin/mailman/listinfo
++
++Or send mail with subject "subscribe" for the general list to:
++
++	mipl-request@list.mipl.mediapoli.com
++
++or for the developer list to:
++
++	mipl-devel-request@list.mail.mediapoli.com
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/auth_opt.c linux-2.4.25/net/ipv6/mobile_ip6/auth_opt.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/auth_opt.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/auth_opt.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,121 @@
++/*
++ *	MIPv6 Binding Authentication Data Option functions
++ *	
++ *      Authors: 
++ *      Henrik Petander         <lpetande@tml.hut.fi>
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/autoconf.h>
++#include <linux/icmpv6.h>
++#include <net/mipv6.h>
++
++#include "debug.h"
++#include "hmac.h"
++#include "mobhdr.h"
++
++#define DBG_KEY 5
++
++int mipv6_auth_build(struct in6_addr *cn_addr, struct in6_addr *coa, 
++		     __u8 *mh, __u8 *aud_data, __u8 *k_bu)
++{
++	/* First look up the peer from sadb based on his address */ 
++	struct ah_processing ahp;
++
++	/* Don't add any other options or this system is screwed */
++
++	__u8 buf[MAX_HASH_LENGTH];  
++	
++	
++	if (!k_bu) {
++		DEBUG(DBG_ERROR, "k_bu missing, aborting");
++		return -1;
++	}
++	DEBUG(DBG_KEY, "Key for building authenticator:");
++	debug_print_buffer(DBG_KEY, k_bu, HMAC_SHA1_KEY_SIZE);
++
++	if (ah_hmac_sha1_init(&ahp, k_bu,  HMAC_SHA1_KEY_SIZE) < 0) {
++		DEBUG(DBG_ERROR, "Failed to initialize hmac sha1");
++                return -1; 
++        } 
++
++	DEBUG(DBG_KEY, "coa: ");
++	debug_print_buffer(DBG_KEY, coa, 16);
++	DEBUG(DBG_KEY, "cn_addr: ");
++	debug_print_buffer(DBG_KEY, cn_addr, 16);
++	DEBUG(DBG_KEY, "MH contents: ");
++	debug_print_buffer(DBG_KEY, mh, aud_data - mh);
++
++	/* First the common part */
++	ah_hmac_sha1_loop(&ahp, coa, sizeof(struct in6_addr));
++	ah_hmac_sha1_loop(&ahp, cn_addr, sizeof(struct in6_addr));
++	ah_hmac_sha1_loop(&ahp, mh, aud_data - mh);
++	ah_hmac_sha1_result(&ahp, buf);
++
++	memcpy(aud_data, buf,  MIPV6_RR_MAC_LENGTH);
++
++	return 0;
++}
++
++int mipv6_auth_check(struct in6_addr *cn_addr, struct in6_addr *coa,
++		     __u8 *opt, __u8 optlen, 
++		     struct mipv6_mo_bauth_data *aud, __u8 *k_bu)
++{
++	int ret = -1;
++	struct ah_processing ahp;
++	__u8 htarget[MAX_HASH_LENGTH];
++
++	/* Look up peer by home address */ 
++	if (!k_bu) {
++		DEBUG(DBG_ERROR, "k_bu missing, aborting"); 
++		return -1;
++	}
++
++	DEBUG(DBG_KEY, "Key for checking authenticator:");
++	debug_print_buffer(DBG_KEY, k_bu, HMAC_SHA1_KEY_SIZE);
++
++	if (!aud || !coa) {
++		DEBUG(DBG_INFO, "%s is NULL", aud ? "coa" : "aud");
++		goto out;
++	}
++
++	if (aud->length != MIPV6_RR_MAC_LENGTH) {
++		DEBUG(DBG_ERROR,
++			 ": Incorrect authentication option length %d", aud->length); 
++		goto out; 
++	}
++	
++	if (ah_hmac_sha1_init(&ahp, k_bu, HMAC_SHA1_KEY_SIZE) < 0) { 
++                DEBUG(DBG_ERROR,
++			 "internal error in initialization of authentication algorithm");
++		goto out;
++        } 
++	DEBUG(DBG_KEY, "coa: ");
++	debug_print_buffer(DBG_KEY, coa, 16);
++	DEBUG(DBG_KEY, "cn_addr: ");
++	debug_print_buffer(DBG_KEY, cn_addr, 16);
++	DEBUG(DBG_KEY, "MH contents: ");
++	debug_print_buffer(DBG_KEY, opt, (u8*) aud->data - opt);
++
++	ah_hmac_sha1_loop(&ahp, coa, sizeof(struct in6_addr));
++	ah_hmac_sha1_loop(&ahp, cn_addr, sizeof(struct in6_addr));
++
++	/* 
++	 * Process MH + options till the start of the authenticator in
++	 * Auth. data option
++	 */
++	ah_hmac_sha1_loop(&ahp, opt,  (u8 *)aud->data - opt);
++	ah_hmac_sha1_result(&ahp, htarget);
++	if (memcmp(htarget, aud->data, MIPV6_RR_MAC_LENGTH) == 0)
++		ret = 0;
++
++	DEBUG(DBG_ERROR, "returning %d", ret);
++out:	
++	return ret;
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/bcache.c linux-2.4.25/net/ipv6/mobile_ip6/bcache.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/bcache.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/bcache.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,746 @@
++/*
++ *      Binding Cache
++ *
++ *      Authors:
++ *      Juha Mynttinen            <jmynttin@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++/*
++ *	Changes:
++ *
++ *	Nanno Langstraat	:	Timer code cleaned up, active socket
++ *					test rewritten
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/spinlock.h>
++#include <linux/proc_fs.h>
++#include <linux/ipv6_route.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/tcp.h>
++#include <net/udp.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "bcache.h"
++#include "hashlist.h"
++#include "debug.h"
++#include "mobhdr.h"
++#include "tunnel.h"
++#include "config.h"
++
++#define TIMERDELAY HZ/10
++
++struct mipv6_bcache {
++	struct hashlist *entries;
++	__u32 size;
++	struct timer_list callback_timer;
++};
++
++struct in6_addr_pair {
++	struct in6_addr *a1;
++	struct in6_addr *a2;
++};
++
++static rwlock_t bcache_lock = RW_LOCK_UNLOCKED;
++
++static struct mipv6_bcache bcache;
++
++static int bcache_proc_info(char *buffer, char **start, off_t offset,
++			    int length);
++
++#define MIPV6_BCACHE_HASHSIZE  32
++
++/* Moment of transmission of a BR, in seconds before bcache entry expiry */
++#define BCACHE_BR_SEND_LEAD  3
++
++#define MIPV6_MAX_BRR 3 /* Send 3 BRRs before deleting BC entry */
++#define MIPV6_BRR_RATE HZ /* Send BRRs once per second */
++
++/* 
++ * Internal functions.
++ */
++
++struct cache_entry_iterator_args {
++	struct mipv6_bce **entry;
++};
++
++static int find_first_cache_entry_iterator(void *data, void *args,
++					   unsigned long *lifetime)
++{
++	struct mipv6_bce *entry =
++	    (struct mipv6_bce *) data;
++	struct cache_entry_iterator_args *state =
++	    (struct cache_entry_iterator_args *) args;
++
++	ASSERT(entry != NULL);
++
++	if (entry->type == CACHE_ENTRY) {
++		*(state->entry) = entry;
++		return ITERATOR_STOP;	/* stop iteration */
++	} else {
++		return ITERATOR_CONT;	/* continue iteration */
++	}
++}
++
++
++/* 
++ * Get memory for a new bcache entry.  If bcache is full, a cache
++ * entry may be deleted to get space for a home registration, but not
++ * vice versa.
++ */
++static struct mipv6_bce *mipv6_bce_alloc(__u8 type)
++{
++	struct mipv6_bce *entry;
++	struct cache_entry_iterator_args args;
++
++	DEBUG_FUNC();
++
++	entry = (struct mipv6_bce *)
++		hashlist_alloc(bcache.entries, SLAB_ATOMIC);
++
++	/* Cache replacement policy: always replace the CACHE_ENTRY
++           closest to expiration.  Type HOME_REGISTRATION entry may
++           never be deleted before expiration. */
++	if (entry == NULL) {
++		/* cache full, try to delete a CACHE_ENTRY */
++		args.entry = &entry;
++		hashlist_iterate(bcache.entries, &args,
++				 find_first_cache_entry_iterator);
++		if (entry == NULL)
++			return NULL;
++		hashlist_delete(bcache.entries,
++				(struct hashlist_entry *)entry);
++		entry = (struct mipv6_bce *)
++			hashlist_alloc(bcache.entries, SLAB_ATOMIC);
++	}
++	return entry;
++}
++
++/*
++ * Frees entry's memory allocated with mipv6_bce_alloc
++ */
++static void mipv6_bce_free(struct mipv6_bce *entry)
++{
++	hashlist_free(bcache.entries, (void *) entry);
++}
++
++/*
++ * Removes all expired entries 
++ */
++static void expire(void)
++{
++	struct mipv6_bce *entry;
++	struct br_addrs {
++		struct in6_addr daddr;
++		struct in6_addr saddr;
++		struct br_addrs *next;
++	};
++	struct br_addrs *br_info = NULL;
++
++	DEBUG_FUNC();
++
++	write_lock(&bcache_lock);
++
++	while ((entry = (struct mipv6_bce *)
++		hashlist_get_first(bcache.entries)) != NULL) {
++		struct rt6_info *rt;
++		if (time_after_eq(jiffies, entry->callback_time)) {
++
++			DEBUG(DBG_INFO, "an entry expired");
++
++			if (entry->type & HOME_REGISTRATION) {
++				mip6_fn.proxy_del(&entry->home_addr, entry);
++			}
++			hashlist_delete(bcache.entries, (void *)entry);
++			mipv6_bce_free(entry);
++			entry = NULL;
++		} else if (entry->br_callback_time != 0 &&
++			   time_after_eq(jiffies, entry->br_callback_time) &&
++			   entry->br_count < MIPV6_MAX_BRR &&
++			   (rt = rt6_lookup(&entry->home_addr, &entry->our_addr, 0, 0)) != NULL){
++			/* Do we have a destination cache entry for the home address */
++			if (rt->rt6i_flags & RTF_CACHE) {
++				struct br_addrs *tmp;
++				tmp = br_info;
++				DEBUG(DBG_INFO,
++				      "bcache entry recently used. Sending BR.");
++				/* queue for sending */
++				br_info = kmalloc(sizeof(struct br_addrs),
++						  GFP_ATOMIC);
++				if (br_info) {
++					ipv6_addr_copy(&br_info->saddr,
++						       &entry->our_addr);
++					ipv6_addr_copy(&br_info->daddr,
++						       &entry->home_addr);
++					br_info->next = tmp;
++					entry->last_br = jiffies;
++					entry->br_callback_time = jiffies + MIPV6_BRR_RATE;
++					entry->br_count++;
++				} else {
++					br_info = tmp;
++					DEBUG(DBG_ERROR, "Out of memory");
++				}
++				
++			} else
++				entry->br_callback_time = 0;	
++			dst_release(&rt->u.dst);
++		} else {
++			entry->br_callback_time = 0;
++			break;
++		}
++	}
++	write_unlock(&bcache_lock);
++
++	while (br_info) {
++		struct br_addrs *tmp = br_info->next;
++		if (mipv6_send_brr(&br_info->saddr, &br_info->daddr, NULL) < 0)
++			DEBUG(DBG_WARNING,
++			      "BR send for %x:%x:%x:%x:%x:%x:%x:%x failed",
++			      NIPV6ADDR(&br_info->daddr));
++		kfree(br_info);
++		br_info = tmp;
++	}
++}
++
++static void set_timer(void)
++{
++	struct mipv6_bce *entry;
++	unsigned long callback_time;
++
++	DEBUG_FUNC();
++
++	entry = (struct mipv6_bce *)
++		hashlist_get_first(bcache.entries);
++	if (entry != NULL) {
++		if (entry->br_callback_time > 0 && 
++		    time_after(entry->br_callback_time, jiffies))
++			callback_time = entry->br_callback_time;
++		else if (time_after(entry->callback_time, jiffies))
++			callback_time = entry->callback_time;
++		else {
++			DEBUG(DBG_WARNING, 
++			      "bcache timer attempted to schedule"
++			      " for a historical jiffies count!");
++			callback_time = jiffies + TIMERDELAY;
++		}
++		
++		DEBUG(DBG_INFO, "setting timer to now");
++		mod_timer(&bcache.callback_timer, callback_time);
++	} else {
++		del_timer(&bcache.callback_timer);
++		DEBUG(DBG_INFO, "BC empty, not setting a new timer");
++	}
++}
++
++/* 
++ * The function that is scheduled to do the callback functions. May be
++ * modified e.g to allow Binding Requests, now only calls expire() and
++ * schedules a new timer.
++ */
++static void timer_handler(unsigned long dummy)
++{
++	expire();
++	write_lock(&bcache_lock);
++	set_timer();
++	write_unlock(&bcache_lock);
++}
++
++/*
++ * Interface functions visible to other modules
++ */
++
++/**
++ * mipv6_bcache_add - add Binding Cache entry
++ * @ifindex: interface index
++ * @our_addr: own address
++ * @home_addr_org: MN's home address
++ * @coa: MN's care-of address
++ * @lifetime: lifetime for this binding
++ * @prefix: prefix length
++ * @seq: sequence number
++ * @flags: flags received in BU
++ * @type: type of entry
++ *
++ * Adds an entry for this @home_addr_org in the Binding Cache.  If entry
++ * already exists, old entry is updated.  @type may be %CACHE_ENTRY or
++ * %HOME_REGISTRATION.
++ **/
++int mipv6_bcache_add(int ifindex,
++		     struct in6_addr *our_addr,
++		     struct in6_addr *home_addr,
++		     struct in6_addr *coa,
++		     __u32 lifetime, __u16 seq, __u8 flags, __u8 type)
++{
++	struct mipv6_bce *entry;
++	int update = 0;
++	int create_tunnel = 0;
++	unsigned long now = jiffies;
++	struct in6_addr_pair hashkey;
++	int ret = -1;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	write_lock(&bcache_lock);
++
++	if (type == HOME_REGISTRATION && !(mip6node_cnf.capabilities&CAP_HA))
++		return 0;
++
++	if (unlikely(bcache.entries == NULL)) {
++		ret = -ENOMEM;
++		goto err;
++	}
++
++	if ((entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) != NULL) {
++		/* if an entry for this home_addr exists (with smaller
++		 * seq than the new seq), update it by removing it
++		 * first
++		 */
++		if (!MIPV6_SEQ_GT(seq, entry->seq)) {
++			DEBUG(DBG_INFO, "smaller seq than existing, not updating");
++			goto out;
++		}
++		DEBUG(DBG_INFO, "updating an existing entry");
++		update = 1;
++
++		/* H-flag is already checked in BU handler. */
++		/* XXX: Should we care about the other flags?*/
++		if (flags != entry->flags) {
++			DEBUG(DBG_INFO, "entry/BU flag mismatch");
++		}
++
++		if (type == HOME_REGISTRATION) {
++			create_tunnel = (ipv6_addr_cmp(&entry->coa, coa) ||
++					 entry->ifindex != ifindex);
++		}
++	} else {
++		/* no entry for this home_addr, try to create a new entry */
++		DEBUG(DBG_INFO, "creating a new entry");
++		update = 0;
++
++		entry = mipv6_bce_alloc(type);
++		if (entry == NULL) {
++			DEBUG(DBG_INFO, "cache full, entry not added");
++			goto err;
++		}
++
++		create_tunnel = (type == HOME_REGISTRATION);
++	}
++
++	if (create_tunnel) {
++		if (update)
++			mip6_fn.proxy_del(&entry->home_addr, entry);
++		if (mip6_fn.proxy_create(flags, ifindex, coa, our_addr, home_addr) < 0) {
++			goto err_proxy;
++		}
++	}
++
++	ipv6_addr_copy(&(entry->our_addr), our_addr);
++	ipv6_addr_copy(&(entry->home_addr), home_addr);
++	ipv6_addr_copy(&(entry->coa), coa);
++	entry->ifindex = ifindex;
++	entry->seq = seq;
++	entry->type = type;
++	entry->flags = flags;
++	
++	entry->last_br = 0;
++	entry->destunr_count = 0;
++	entry->callback_time = now + lifetime * HZ;
++	if (entry->type & HOME_REGISTRATION)
++		entry->br_callback_time = 0;
++	else
++		entry->br_callback_time = now +
++			(lifetime - BCACHE_BR_SEND_LEAD) * HZ;
++	
++	if (update) {
++		DEBUG(DBG_INFO, "updating entry : %x", entry);
++		hashlist_reposition(bcache.entries, (void *)entry, 
++				    entry->callback_time);
++	} else {
++		DEBUG(DBG_INFO, "adding entry: %x", entry);
++		if ((hashlist_add(bcache.entries,
++				  &hashkey,
++				  entry->callback_time, entry)) < 0) {
++			
++			DEBUG(DBG_ERROR, "Hash add failed");
++			goto err_hashlist;
++		}
++	}
++	
++	set_timer();
++	
++out:
++	write_unlock(&bcache_lock);
++	return 0;
++
++err_hashlist:
++	if (create_tunnel) {
++		mip6_fn.proxy_del(home_addr, entry);
++	}
++err_proxy:
++	if (update) {
++		hashlist_delete(bcache.entries, (void *)entry);
++	}
++	mipv6_bce_free(entry);
++err:
++	write_unlock(&bcache_lock);
++	return ret;
++}
++
++int mipv6_bcache_icmp_err(struct in6_addr *home_addr,
++			  struct in6_addr *our_addr, 
++			  int destunr_count)
++{
++	struct mipv6_bce *entry;
++	struct in6_addr_pair hashkey;
++
++	int ret = -ENOENT;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	write_lock(&bcache_lock);
++	if (unlikely(bcache.entries == NULL)) {
++		ret = -ENOMEM;
++		goto err;
++	}
++
++	if ((entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) != NULL) {
++		entry->last_destunr = jiffies;
++		entry->destunr_count = destunr_count;
++		ret = 0;
++	}
++err:
++	write_unlock(&bcache_lock);
++	return ret;
++}
++
++
++/**
++ * mipv6_bcache_delete - delete Binding Cache entry
++ * @home_addr: MN's home address
++ * @our_addr: our address
++ * @type: type of entry
++ *
++ * Deletes an entry associated with @home_addr from Binding Cache.
++ * Valid values for @type are %CACHE_ENTRY, %HOME_REGISTRATION and
++ * %ANY_ENTRY.  %ANY_ENTRY deletes any type of entry.
++ **/
++int mipv6_bcache_delete(struct in6_addr *home_addr,
++			struct in6_addr *our_addr, __u8 type)
++{
++	struct mipv6_bce *entry;
++	struct in6_addr_pair hashkey;
++	int err = 0;
++
++	DEBUG_FUNC();
++
++	if (home_addr == NULL || our_addr == NULL) {
++		DEBUG(DBG_INFO, "error in arguments");
++		return -EINVAL;
++	}
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	write_lock(&bcache_lock);
++
++	if (unlikely(bcache.entries == NULL) ||
++	    (entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) == NULL ||
++	    !(entry->type & type)) {
++		DEBUG(DBG_INFO, "No matching entry found");
++		err = -ENOENT;
++		goto out;
++	}
++
++	hashlist_delete(bcache.entries, (void *) entry);
++	mipv6_bce_free(entry);
++
++	set_timer();
++out:
++	write_unlock(&bcache_lock);
++	return err;
++}
++
++/**
++ * mipv6_bcache_exists - check if entry exists
++ * @home_addr: home address to check
++ * @our_addr: our address
++ *
++ * Determines if a binding exists for @home_addr.  Returns type of the
++ * entry or negative if entry does not exist.
++ **/
++int mipv6_bcache_exists(struct in6_addr *home_addr,
++			struct in6_addr *our_addr)
++{
++	struct mipv6_bce *entry;
++	struct in6_addr_pair hashkey;
++	int type = -ENOENT;
++
++	DEBUG_FUNC();
++
++	if (home_addr == NULL || our_addr == NULL)
++		return -EINVAL;
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	read_lock(&bcache_lock);
++	if (likely(bcache.entries != NULL) &&
++	    (entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) != NULL) {
++		type = entry->type;
++	}
++	read_unlock(&bcache_lock);
++
++	return type;
++}
++
++/**
++ * mipv6_bcache_get - get entry from Binding Cache
++ * @home_addr: home address to search
++ * @our_addr: our address
++ * @entry: pointer to buffer
++ *
++ * Gets a copy of Binding Cache entry for @home_addr. If entry 
++ * exists entry is copied to @entry and zero is returned.  
++ * Otherwise returns negative.
++ **/
++int mipv6_bcache_get(struct in6_addr *home_addr,
++		     struct in6_addr *our_addr,
++		     struct mipv6_bce *entry)
++{
++	struct mipv6_bce *entry2;
++	struct in6_addr_pair hashkey;
++	int ret = -ENOENT;
++
++	DEBUG_FUNC();
++
++	if (home_addr == NULL || our_addr == NULL || entry == NULL)
++		return -EINVAL;
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	read_lock_bh(&bcache_lock);
++
++	entry2 = (struct mipv6_bce *)
++		hashlist_get(bcache.entries, &hashkey);
++	if (entry2 != NULL) {
++		memcpy(entry, entry2, sizeof(struct mipv6_bce));
++		ret = 0;
++	}
++	read_unlock_bh(&bcache_lock);
++	return ret;
++}
++
++int mipv6_bcache_iterate(hashlist_iterator_t func, void *args)
++{
++	int ret;
++
++	read_lock_bh(&bcache_lock);
++	ret = hashlist_iterate(bcache.entries, args, func);
++	read_unlock_bh(&bcache_lock);
++
++	return ret;
++}
++
++/*
++ * Proc-filesystem functions
++ */
++
++#define BC_INFO_LEN 80
++
++struct procinfo_iterator_args {
++	char *buffer;
++	int offset;
++	int length;
++	int skip;
++	int len;
++};
++
++static int procinfo_iterator(void *data, void *args, unsigned long *pref)
++{
++	struct procinfo_iterator_args *arg =
++	    (struct procinfo_iterator_args *) args;
++	struct mipv6_bce *entry =
++	    (struct mipv6_bce *) data;
++
++	ASSERT(entry != NULL);
++
++	if (arg->skip < arg->offset / BC_INFO_LEN) {
++		arg->skip++;
++		return ITERATOR_CONT;
++	}
++
++	if (arg->len >= arg->length)
++		return ITERATOR_CONT;
++
++	/* HoA CoA CallbackInSecs Type */
++	arg->len += sprintf(arg->buffer + arg->len,
++			    "%08x%08x%08x%08x %08x%08x%08x%08x %010lu %02d\n",
++			    ntohl(entry->home_addr.s6_addr32[0]),
++			    ntohl(entry->home_addr.s6_addr32[1]),
++			    ntohl(entry->home_addr.s6_addr32[2]),
++			    ntohl(entry->home_addr.s6_addr32[3]),
++			    ntohl(entry->coa.s6_addr32[0]),
++			    ntohl(entry->coa.s6_addr32[1]),
++			    ntohl(entry->coa.s6_addr32[2]),
++			    ntohl(entry->coa.s6_addr32[3]),
++			    ((entry->callback_time) - jiffies) / HZ,
++			    (int) entry->type);
++
++	return ITERATOR_CONT;
++}
++
++ /*
++  * Callback function for proc filesystem.
++  */
++static int bcache_proc_info(char *buffer, char **start, off_t offset,
++			    int length)
++{
++	struct procinfo_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.buffer = buffer;
++	args.offset = offset;
++	args.length = length;
++	args.skip = 0;
++	args.len = 0;
++
++	read_lock_bh(&bcache_lock);
++	hashlist_iterate(bcache.entries, &args, procinfo_iterator);
++	read_unlock_bh(&bcache_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % BC_INFO_LEN;
++
++	args.len -= offset % BC_INFO_LEN;
++
++	if (args.len > length)
++		args.len = length;
++	if (args.len < 0)
++		args.len = 0;
++
++	return args.len;
++}
++
++static int bcache_compare(void *data, void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *) hashkey;
++	struct mipv6_bce *e = (struct mipv6_bce *) data;
++
++	if (ipv6_addr_cmp(&e->home_addr, p->a1) == 0
++	    && ipv6_addr_cmp(&e->our_addr, p->a2) == 0)
++		return 0;
++	else
++		return -1;
++}
++
++static __u32 bcache_hash(void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *) hashkey;
++
++	return p->a1->s6_addr32[0] ^ p->a1->s6_addr32[1] ^
++		p->a2->s6_addr32[2] ^ p->a2->s6_addr32[3];
++}
++
++/* 
++ * Initialization and shutdown functions
++ */
++
++int __init mipv6_bcache_init(__u32 size)
++{
++	if (size < 1) {
++		DEBUG(DBG_ERROR, "Binding cache size must be at least 1");
++		return -EINVAL;
++	}
++	bcache.entries = hashlist_create(MIPV6_BCACHE_HASHSIZE, size,
++					 sizeof(struct mipv6_bce),
++					 "mip6_bcache", NULL, NULL,
++					 bcache_compare, bcache_hash);
++
++	if (bcache.entries == NULL) {
++		DEBUG(DBG_ERROR, "Failed to initialize hashlist");
++		return -ENOMEM;
++	}
++
++	init_timer(&bcache.callback_timer);
++	bcache.callback_timer.data = 0;
++	bcache.callback_timer.function = timer_handler;
++	bcache.size = size;
++
++	proc_net_create("mip6_bcache", 0, bcache_proc_info);
++
++	DEBUG(DBG_INFO, "Binding cache initialized");
++	return 0;
++}
++
++static int 
++bce_cleanup_iterator(void *rawentry, void *args, unsigned long *sortkey)
++{
++	int type = (int) args;
++	struct mipv6_bce *entry = (struct mipv6_bce *) rawentry;
++	if (entry->type == type) {
++		if (entry->type & HOME_REGISTRATION) {
++			if (unlikely(mip6_fn.proxy_del == NULL))
++				DEBUG(DBG_ERROR, "proxy_del unitialized");
++			else
++				mip6_fn.proxy_del(&entry->home_addr, entry);
++		}
++		return ITERATOR_DELETE_ENTRY;
++	}
++	return ITERATOR_CONT;
++
++}
++
++void mipv6_bcache_cleanup(int type)
++{
++	write_lock_bh(&bcache_lock);
++	hashlist_iterate(bcache.entries,(void *) type, bce_cleanup_iterator);
++	write_unlock_bh(&bcache_lock);
++}
++
++int __exit mipv6_bcache_exit(void)
++{
++	struct hashlist *entries;
++
++	DEBUG_FUNC();
++
++	proc_net_remove("mip6_bcache");
++
++	write_lock_bh(&bcache_lock);
++	DEBUG(DBG_INFO, "Stopping the bcache timer");
++	del_timer(&bcache.callback_timer);
++	hashlist_iterate(bcache.entries,(void *)CACHE_ENTRY, 
++			 bce_cleanup_iterator);
++
++	entries = bcache.entries;
++	bcache.entries = NULL;
++	write_unlock_bh(&bcache_lock);
++
++	hashlist_destroy(entries);
++	return 0;
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/bcache.h linux-2.4.25/net/ipv6/mobile_ip6/bcache.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/bcache.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/bcache.h	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,72 @@
++/*
++ *      MIPL Mobile IPv6 Binding Cache header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _BCACHE_H
++#define _BCACHE_H
++
++#include <linux/in6.h>
++#include <linux/timer.h>
++#include "hashlist.h"
++
++#define CACHE_ENTRY 1 /* this and HOME_REGISTRATION are the entry types */
++#define HOME_REGISTRATION 2
++#define ANY_ENTRY 3
++
++#define MIPV6_MAX_DESTUNREACH 5 /* Delete CN BCEs after 5 destination unreachables */
++#define MIPV6_DEST_UNR_IVAL  10 /* What is the max interval of destination  
++				   unreacahable error messages for them to be persistent*/
++
++struct mipv6_bce {
++	struct hashlist_entry e;
++	int ifindex;				/* Interface identifier */
++	struct in6_addr our_addr;		/* our address (as seen by the MN) */
++	struct in6_addr home_addr;		/* MN home address */
++	struct in6_addr coa;			/* MN care-of address */
++	unsigned long callback_time;		/* time of expiration     (in jiffies) */
++	unsigned long br_callback_time;		/* time for sending a BR  (in jiffies) */
++	int (*callback_function)(struct mipv6_bce *entry);
++	__u8 type;				/* home registration */
++	__u8 router;				/* mn is router */
++	__u8 flags;				/* flags received in BU */
++	__u16 seq;				/* sequence number */
++	unsigned long last_br;			/* time when last BR sent */
++	unsigned long last_destunr;             /* time when last ICMP destination unreachable received */
++	int br_count;				/* How many BRRs have sent */
++	int destunr_count;                      /* Number of destination unreachables received */   
++};
++
++int mipv6_bcache_add(int ifindex, struct in6_addr *our_addr, 
++		     struct in6_addr *home_addr, struct in6_addr *coa,
++		     __u32 lifetime, __u16 seq, __u8 flags, __u8 type);
++
++int mipv6_bcache_icmp_err(struct in6_addr *home_addr,
++			  struct in6_addr *our_addr, 
++			  int destunr_count);
++
++int mipv6_bcache_delete(struct in6_addr *home_addr, struct in6_addr *our_addr,
++			__u8 type);
++
++int mipv6_bcache_exists(struct in6_addr *home_addr,
++			struct in6_addr *our_addr);
++
++int mipv6_bcache_get(struct in6_addr *home_addr,
++		     struct in6_addr *our_addr,
++		     struct mipv6_bce *entry);
++
++int mipv6_bcache_iterate(int (*func)(void *, void *, unsigned long *), void *args);
++
++void mipv6_bcache_cleanup(int type);
++
++int mipv6_bcache_init(__u32 size);
++
++int mipv6_bcache_exit(void);
++
++#endif /* _BCACHE_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/bul.c linux-2.4.25/net/ipv6/mobile_ip6/bul.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/bul.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/bul.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,634 @@
++/*
++ *      Binding update list
++ *
++ *      Authors:
++ *      Juha Mynttinen            <jmynttin@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++/*
++ *	Changes:
++ *
++ *	Nanno Langstraat	:	Timer code cleaned up
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/spinlock.h>
++#include <net/ipv6.h>
++#include <net/mipv6.h>
++#include <linux/proc_fs.h>
++
++#include "bul.h"
++#include "debug.h"
++#include "hashlist.h"
++#include "tunnel_mn.h"
++#include "mobhdr.h"
++
++#define MIPV6_BUL_HASHSIZE 32
++
++rwlock_t bul_lock = RW_LOCK_UNLOCKED;
++
++struct mipv6_bul {
++	struct hashlist *entries;
++	struct timer_list callback_timer;
++};
++
++static struct mipv6_bul bul;
++
++struct in6_addr_pair {
++	struct in6_addr *a1;
++	struct in6_addr *a2;
++};
++
++/**********************************************************************
++ *
++ * Private functions
++ *
++ **********************************************************************/
++
++static int bul_compare(void *data, void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *)hashkey;
++	struct mipv6_bul_entry *e = (struct mipv6_bul_entry *)data;
++
++	if (ipv6_addr_cmp(&e->cn_addr, p->a1) == 0
++	    && ipv6_addr_cmp(&e->home_addr, p->a2) == 0)
++		return 0;
++	else
++		return -1;
++}
++
++struct test_keys {
++	struct in6_addr *addr;
++	u8 *cookie;
++};
++
++static int bul_compare_cookie(void *data, void *keys)
++{
++	struct test_keys *p = (struct test_keys *)keys;
++	struct mipv6_bul_entry *e = (struct mipv6_bul_entry *)data;
++
++	if (ipv6_addr_cmp(&e->cn_addr, p->addr) == 0 && e->rr
++	    && memcmp(&e->rr->cot_cookie, p->cookie, 8) == 0)
++		return 0;
++	else
++		return -1;
++}
++
++static u32 bul_hash(void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *)hashkey;
++	
++	return p->a1->s6_addr32[0] ^
++		p->a1->s6_addr32[1] ^
++		p->a1->s6_addr32[2] ^
++		p->a1->s6_addr32[3];
++}
++
++static int bul_proc_info(char *buffer, char **start, off_t offset,
++			    int length);
++
++static struct mipv6_bul_entry *mipv6_bul_get_entry(void)
++{
++	DEBUG_FUNC();
++	return ((struct mipv6_bul_entry *) 
++		hashlist_alloc(bul.entries, SLAB_ATOMIC));
++}
++
++static void mipv6_bul_entry_free(struct mipv6_bul_entry *entry)
++{
++	DEBUG_FUNC();		
++
++	if (entry->rr) {
++		if (entry->rr->kbu)
++			kfree(entry->rr->kbu);
++		kfree(entry->rr);
++	}
++	if (entry->ops)
++		kfree(entry->ops);
++	hashlist_free(bul.entries, (void *)entry);
++}
++
++static __inline__ int del_bul_entry_tnl(struct mipv6_bul_entry *entry) 
++{
++	if (entry->flags & MIPV6_BU_F_HOME) {
++		return mipv6_mv_tnl_to_ha(&entry->cn_addr, 
++                                          &entry->coa,
++                                          &entry->home_addr);
++	}
++	return 0;
++}
++
++static void timer_update(void)
++{
++	struct mipv6_bul_entry *entry;
++
++	DEBUG_FUNC();
++
++	entry = hashlist_get_first(bul.entries);
++
++	while (entry && time_after_eq(jiffies, entry->callback_time)) {
++		if (time_after_eq(jiffies, entry->expire) ||
++		    entry->callback(entry) != 0) {
++			/*
++			 * Either the entry has expired, or the callback
++			 * indicated that it should be deleted.
++			 */
++			hashlist_delete(bul.entries, (void *)entry);
++			
++			del_bul_entry_tnl(entry);
++			mipv6_bul_entry_free(entry);
++			DEBUG(DBG_INFO, "Entry deleted (was expired) from "
++			      "binding update list");
++		} else {
++			/* move entry to its right place in the hashlist */
++			DEBUG(DBG_INFO, "Rescheduling");
++			hashlist_reposition(bul.entries, (void *)entry,
++					    entry->callback_time);
++		}
++		entry = (struct mipv6_bul_entry *)
++			hashlist_get_first(bul.entries);
++	}
++
++	if (entry == NULL) {
++		DEBUG(DBG_INFO, "bul empty, not setting a new timer");
++		del_timer(&bul.callback_timer);
++	} else {
++		mod_timer(&bul.callback_timer, entry->callback_time);
++	}
++}
++
++static void timer_handler(unsigned long dummy)
++{
++	DEBUG_FUNC();
++
++	write_lock(&bul_lock);
++	timer_update();
++	write_unlock(&bul_lock);
++}
++
++/**********************************************************************
++ *
++ * Public interface functions
++ *
++ **********************************************************************/
++
++/**
++ * mipv6_bul_iterate - apply interator function to all entries
++ * @func: function to apply
++ * @args: extra arguments for iterator
++ *
++ * Applies @func for each entry in Binding Update List.  Extra
++ * arguments given in @args are also passed to the iterator function.
++ * Caller must hold @bul_lock.
++ **/
++int mipv6_bul_iterate(hashlist_iterator_t func, void *args)
++{
++	DEBUG_FUNC();
++
++	return hashlist_iterate(bul.entries, args, func);
++}
++
++/**
++ * mipv6_bul_exists - check if Binding Update List entry exists
++ * @cn: address to check
++ *
++ * Checks if Binding Update List has an entry for @cn.  Returns true
++ * if entry exists, false otherwise. Caller may not hold @bul_lock.
++ **/
++int mipv6_bul_exists(struct in6_addr *cn, struct in6_addr *haddr)
++{
++	int exists;
++	struct in6_addr_pair hashkey;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = cn;
++	hashkey.a2 = haddr;
++	
++	read_lock_bh(&bul_lock);
++
++	if (unlikely(bul.entries == NULL))
++		exists = 0;
++	else
++		exists = (hashlist_get(bul.entries, &hashkey) != NULL);
++
++	read_unlock_bh(&bul_lock);
++	return exists;
++}
++
++/**
++ * mipv6_bul_get - get Binding Update List entry
++ * @cn_addr: CN address to search
++ * @home_addr: home address to search
++ *
++ * Returns Binding Update List entry for @cn_addr if it exists.
++ * Otherwise returns %NULL.  Caller must hold @bul_lock.
++ **/
++struct mipv6_bul_entry *mipv6_bul_get(struct in6_addr *cn_addr, 
++				      struct in6_addr *home_addr)
++{
++	struct mipv6_bul_entry *entry;
++	struct in6_addr_pair hashkey;
++	
++	DEBUG_FUNC();
++
++	if (unlikely(bul.entries == NULL)) {
++		return NULL;
++	}
++	hashkey.a1 = cn_addr;
++	hashkey.a2 = home_addr;
++
++	entry = (struct mipv6_bul_entry *) 
++		hashlist_get(bul.entries, &hashkey);
++		
++	return entry;
++}
++
++struct mipv6_bul_entry *mipv6_bul_get_by_ccookie(
++	struct in6_addr *cn_addr, u8 *cookie)
++{
++	struct test_keys key;
++
++	DEBUG_FUNC();
++
++	if (unlikely(bul.entries == NULL))
++		return NULL;
++	key.addr = cn_addr;
++	key.cookie = cookie;
++
++	return (struct mipv6_bul_entry *) 
++		hashlist_get_ex(bul.entries, &key,
++				bul_compare_cookie);
++}
++
++/**
++ * mipv6_bul_reschedule - reschedule Binding Update List entry
++ * @entry: entry to reschedule
++ *
++ * Reschedules a Binding Update List entry.  Must be called after
++ * modifying entry lifetime.  Caller must hold @bul_lock (write).
++ **/
++void mipv6_bul_reschedule(struct mipv6_bul_entry *entry)
++{
++	DEBUG_FUNC();
++
++	hashlist_reposition(bul.entries,
++			    (void *)entry,
++			    entry->callback_time);
++	timer_update();
++}
++
++/**
++ * mipv6_bul_add - add binding update to Binding Update List
++ * @cn_addr: IPv6 address where BU was sent
++ * @home_addr: Home address for this binding
++ * @coa: Care-of address for this binding
++ * @lifetime: expiration time of the binding in seconds
++ * @seq: sequence number of the BU
++ * @flags: %MIPV6_BU_F_* flags
++ * @callback: callback function called on expiration
++ * @callback_time: expiration time for callback
++ * @state: binding send state
++ * @delay: retransmission delay
++ * @maxdelay: retransmission maximum delay
++ * @ops: Mobility header options for BU
++ * @rr: Return routability information
++ *
++ * Adds a binding update sent to @cn_addr for @home_addr to the
++ * Binding Update List.  If entry already exists, it is updated.
++ * Entry is set to expire in @lifetime seconds.  Entry has a callback
++ * function @callback that is called at @callback_time.  Entry @state
++ * controls resending of this binding update and it can be set to
++ * %ACK_OK, %RESEND_EXP or %ACK_ERROR.  Returns a pointer to the newly
++ * created or updated entry.  Caller must hold @bul_lock (write).
++ **/
++struct mipv6_bul_entry *mipv6_bul_add(
++	struct in6_addr *cn_addr, struct in6_addr *home_addr,
++	struct in6_addr *coa, 
++	__u32 lifetime,	__u16 seq, __u8 flags,
++	int (*callback)(struct mipv6_bul_entry *entry),
++	__u32 callback_time, 
++	__u8 state, __u32 delay, __u32 maxdelay,
++	struct mipv6_mh_opt *ops, 
++	struct mipv6_rr_info *rr)
++{
++	struct mipv6_bul_entry *entry;
++	int update = 0;
++	struct in6_addr_pair hashkey;
++
++	DEBUG_FUNC();
++
++	if (unlikely(bul.entries == NULL))
++		return NULL;
++
++	if (cn_addr == NULL || home_addr == NULL || coa == NULL || 
++	    lifetime < 0 || callback == NULL || callback_time < 0 || 
++	    (state != ACK_OK && state != RESEND_EXP && state != ACK_ERROR) ||
++	    delay < 0 || maxdelay < 0) {
++		DEBUG(DBG_ERROR, "invalid arguments");
++		return NULL;
++	}
++	DEBUG(DBG_INFO, "cn_addr: %x:%x:%x:%x:%x:%x:%x:%x, "
++	      "home_addr: %x:%x:%x:%x:%x:%x:%x:%x"
++	      "coaddr: %x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(cn_addr), 
++	       NIPV6ADDR(home_addr), NIPV6ADDR(coa));
++	hashkey.a1 = cn_addr;
++	hashkey.a2 = home_addr;
++	
++	/* 
++	 * decide whether to add a new entry or update existing, also
++	 * check if there's room for a new entry when adding a new
++	 * entry (latter is handled by mipv6_bul_get_entry() 
++	 */
++	if ((entry = (struct mipv6_bul_entry *)
++	     hashlist_get(bul.entries, &hashkey)) != NULL) {
++		/* if an entry for this cn_addr exists (with smaller
++		 * seq than the new entry's seq), update it */
++		
++		if (MIPV6_SEQ_GT(seq, entry->seq)) {
++			DEBUG(DBG_INFO, "updating an existing entry");
++			update = 1;
++		} else {
++			DEBUG(DBG_INFO, "smaller seq than existing, not updating");
++			return NULL;
++		}
++	} else {
++		entry = mipv6_bul_get_entry();
++		if (entry == NULL) {
++			DEBUG(DBG_WARNING, "binding update list full, can't add!!!");
++			return NULL;
++		}
++		memset(entry, 0, sizeof(*entry));
++		/* First BU send happens here, save count in the entry */
++		entry->consecutive_sends = 1;
++	}
++
++	if (!update) {
++		ipv6_addr_copy(&(entry->cn_addr), cn_addr);
++		ipv6_addr_copy(&(entry->home_addr), home_addr);
++		entry->ops = ops;
++	}
++	/* Add Return Routability info to bul entry */
++	if (rr) {
++		if(entry->rr)
++			kfree(entry->rr); 
++		entry->rr = rr;
++	}
++
++	ipv6_addr_copy(&(entry->coa), coa);
++	entry->lifetime = lifetime;
++	if (lifetime)
++		entry->expire = jiffies + lifetime * HZ;
++	else if (flags & MIPV6_BU_F_ACK)
++		entry->expire = jiffies + HOME_RESEND_EXPIRE * HZ;
++	entry->seq = seq;
++	entry->flags = flags;
++	entry->lastsend = jiffies; /* current time = last use of the entry */
++	entry->state = state;
++	entry->delay = delay;
++	entry->maxdelay = maxdelay;
++	entry->callback_time = jiffies + callback_time * HZ;
++	entry->callback = callback;
++
++	if (flags & MIPV6_BU_F_HOME && 
++	    mipv6_mv_tnl_to_ha(cn_addr, coa, home_addr)) {
++		DEBUG(DBG_ERROR, "reconfiguration of the tunnel failed");
++	}
++	if (update) {
++		DEBUG(DBG_INFO, "updating entry: %x", entry);
++		hashlist_reposition(bul.entries, (void *)entry,
++				    entry->callback_time);
++	} else {
++		DEBUG(DBG_INFO, "adding entry: %x", entry);
++
++		hashkey.a1 = &entry->cn_addr;
++		hashkey.a2 = &entry->home_addr;
++
++		if ((hashlist_add(bul.entries, &hashkey,
++				  entry->callback_time,
++				  entry)) < 0) {
++			DEBUG(DBG_ERROR, "Hash add failed");
++			mipv6_bul_entry_free(entry);			
++			return NULL;
++		}
++	}
++	timer_update();	
++
++	return entry;
++}
++
++/**
++ * mipv6_bul_delete - delete Binding Update List entry
++ * @cn_addr: address for entry to delete
++ *
++ * Deletes the entry for @cn_addr from the Binding Update List.
++ * Returns zero if entry was deleted succesfully, otherwise returns
++ * negative.  Caller may not hold @bul_lock.
++ **/
++int mipv6_bul_delete(struct in6_addr *cn_addr, struct in6_addr *home_addr)
++{
++	struct mipv6_bul_entry *entry;
++	struct in6_addr_pair hashkey;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = cn_addr;
++	hashkey.a2 = home_addr;
++
++	write_lock(&bul_lock);
++
++	if (unlikely(bul.entries == NULL) ||  
++	    (entry = (struct mipv6_bul_entry *)
++	     hashlist_get(bul.entries, &hashkey)) == NULL) {
++		write_unlock(&bul_lock);
++		DEBUG(DBG_INFO, "No such entry");
++		return -ENOENT;
++	}
++
++	hashlist_delete(bul.entries, (void *)entry);
++
++	del_bul_entry_tnl(entry);
++
++	mipv6_bul_entry_free(entry);
++	timer_update();
++	write_unlock(&bul_lock);
++
++	DEBUG(DBG_INFO, "Binding update list entry deleted");
++
++	return 0;
++}
++
++/**********************************************************************
++ *
++ * Proc interface functions
++ *
++ **********************************************************************/
++
++#define BUL_INFO_LEN 152
++
++struct procinfo_iterator_args {
++	char *buffer;
++	int offset;
++	int length;
++	int skip;
++	int len;
++};
++
++static int procinfo_iterator(void *data, void *args,
++			     unsigned long *sortkey)
++{
++	struct procinfo_iterator_args *arg =
++		(struct procinfo_iterator_args *)args;
++	struct mipv6_bul_entry *entry =
++		(struct mipv6_bul_entry *)data;
++	unsigned long callback_seconds;
++
++	DEBUG_FUNC();
++
++	if (entry == NULL) return ITERATOR_ERR;
++
++	if (time_after(jiffies, entry->callback_time))
++		callback_seconds = 0;
++	else
++		callback_seconds = (entry->callback_time - jiffies) / HZ;
++
++	if (arg->skip < arg->offset / BUL_INFO_LEN) {
++		arg->skip++;
++		return ITERATOR_CONT;
++	}
++
++	if (arg->len >= arg->length)
++		return ITERATOR_CONT;
++
++	/* CN HoA CoA ExpInSecs SeqNum State Delay MaxDelay CallbackInSecs */
++	arg->len += sprintf(arg->buffer + arg->len,
++			    "%08x%08x%08x%08x %08x%08x%08x%08x %08x%08x%08x%08x\n"
++			    "%010lu %05d %02d %010d %010d %010lu\n",
++			    ntohl(entry->cn_addr.s6_addr32[0]),
++			    ntohl(entry->cn_addr.s6_addr32[1]),
++			    ntohl(entry->cn_addr.s6_addr32[2]),
++			    ntohl(entry->cn_addr.s6_addr32[3]),
++			    ntohl(entry->home_addr.s6_addr32[0]),
++			    ntohl(entry->home_addr.s6_addr32[1]),
++			    ntohl(entry->home_addr.s6_addr32[2]),
++			    ntohl(entry->home_addr.s6_addr32[3]),
++			    ntohl(entry->coa.s6_addr32[0]),
++			    ntohl(entry->coa.s6_addr32[1]),
++			    ntohl(entry->coa.s6_addr32[2]),
++			    ntohl(entry->coa.s6_addr32[3]),
++			    (entry->expire - jiffies) / HZ,
++			    entry->seq, entry->state, entry->delay, 
++			    entry->maxdelay, callback_seconds);
++
++	return ITERATOR_CONT;
++}
++
++
++/*
++ * Callback function for proc filesystem.
++ */
++static int bul_proc_info(char *buffer, char **start, off_t offset,
++                            int length)
++{
++	struct procinfo_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.buffer = buffer;
++	args.offset = offset;
++	args.length = length;
++	args.skip = 0;
++	args.len = 0;
++
++	read_lock_bh(&bul_lock);
++	hashlist_iterate(bul.entries, &args, procinfo_iterator);
++	read_unlock_bh(&bul_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % BUL_INFO_LEN;
++
++	args.len -= offset % BUL_INFO_LEN;
++
++	if (args.len > length)
++		args.len = length;
++	if (args.len < 0)
++		args.len = 0;
++	
++	return args.len;
++}
++
++/**********************************************************************
++ *
++ * Code module init/fini functions
++ *
++ **********************************************************************/
++
++int __init mipv6_bul_init(__u32 size)
++{
++	DEBUG_FUNC();
++
++	if (size < 1) {
++		DEBUG(DBG_CRITICAL, 
++		      "Binding update list size must be at least 1");
++		return -EINVAL;
++	}
++	bul.entries = hashlist_create(MIPV6_BUL_HASHSIZE, size, 
++				       sizeof(struct mipv6_bul_entry),
++				       "mip6_bul", NULL, NULL,
++				       bul_compare, bul_hash);
++
++	if (bul.entries == NULL) {
++		DEBUG(DBG_CRITICAL, "Couldn't allocate memory for "
++		      "hashlist when creating a binding update list");
++		return -ENOMEM;
++	}
++	init_timer(&bul.callback_timer);
++	bul.callback_timer.data = 0;
++	bul.callback_timer.function = timer_handler;
++	proc_net_create("mip6_bul", 0, bul_proc_info);
++	DEBUG(DBG_INFO, "Binding update list initialized");
++	return 0;
++}
++
++void __exit mipv6_bul_exit()
++{
++	struct mipv6_bul_entry *entry;
++	struct hashlist *entries;
++
++	DEBUG_FUNC();
++
++	proc_net_remove("mip6_bul");
++
++	write_lock_bh(&bul_lock);
++
++	DEBUG(DBG_INFO, "Stopping the bul timer");
++	del_timer(&bul.callback_timer);
++
++	while ((entry = (struct mipv6_bul_entry *) 
++		hashlist_get_first(bul.entries)) != NULL) {
++		hashlist_delete(bul.entries, (void *)entry);
++		
++		del_bul_entry_tnl(entry);
++		
++		mipv6_bul_entry_free(entry);
++	}
++	entries = bul.entries;
++	bul.entries = NULL;
++	write_unlock_bh(&bul_lock); 
++
++	hashlist_destroy(entries);
++
++	DEBUG(DBG_INFO, "binding update list destroyed");
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/bul.h linux-2.4.25/net/ipv6/mobile_ip6/bul.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/bul.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/bul.h	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,91 @@
++/*
++ *      MIPL Mobile IPv6 Binding Update List header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _BUL_H
++#define _BUL_H
++
++#include "hashlist.h"
++
++#define ACK_OK          0x01
++#define RESEND_EXP      0x02
++#define ACK_ERROR       0x04
++
++#define HOME_RESEND_EXPIRE 3600
++#define MIPV6_COOKIE_LEN 8
++struct mipv6_rr_info {
++	/* RR information */
++	u16 rr_state;                /* State of the RR */
++	u16 rr_flags;                /* Flags for the RR */
++	u8 hot_cookie[MIPV6_COOKIE_LEN];    /* HoT Cookie */
++	u8 cot_cookie[MIPV6_COOKIE_LEN];    /* CoT Cookie */
++	u8 home_cookie[MIPV6_COOKIE_LEN];   /* Home Cookie */
++	u8 careof_cookie[MIPV6_COOKIE_LEN]; /* Careof Cookie */
++	u32 lastsend_hoti;	      /* When HoTI was last sent (jiffies) */
++	u32 lastsend_coti;            /* When CoTI was last sent (jiffies) */
++	u32 home_time;	              /* when Care-of cookie was received */
++	u32 careof_time;	      /* when Home cookie was received */
++	int home_nonce_index;         /* Home cookie nonce index */
++	int careof_nonce_index;       /* Care-of cookie nonce index */
++	u8 *kbu;                      /* Binding authentication key */
++};
++struct mipv6_bul_entry {
++	struct hashlist_entry e;
++	struct in6_addr cn_addr;	/* CN to which BU was sent */
++	struct in6_addr home_addr;	/* home address of this binding */
++	struct in6_addr coa;		/* care-of address of the sent BU */
++
++	unsigned long expire;		/* entry's expiration time (jiffies) */ 
++	__u32 lifetime;			/* lifetime sent in this BU */
++	__u32 lastsend;			/* last time when BU sent (jiffies) */
++	__u32 consecutive_sends;	/* Number of consecutive BU's sent */
++	__u16 seq;			/* sequence number of the latest BU */
++	__u8 flags;			/* BU send flags */
++	__u8 state;			/* resend state */
++	__u32 initdelay;		/* initial ack wait */
++	__u32 delay;			/* current ack wait */
++	__u32 maxdelay;			/* maximum ack wait */
++
++	struct mipv6_rr_info *rr;
++	struct mipv6_mh_opt *ops;	/* saved option values */
++
++	unsigned long callback_time;
++	int (*callback)(struct mipv6_bul_entry *entry);
++};
++
++extern rwlock_t bul_lock;
++
++int mipv6_bul_init(__u32 size);
++
++void mipv6_bul_exit(void);
++
++struct mipv6_bul_entry *mipv6_bul_add(
++	struct in6_addr *cn_addr, struct in6_addr *home_addr,
++	struct in6_addr *coa, __u32 lifetime, __u16 seq, __u8 flags,
++	int (*callback)(struct mipv6_bul_entry *entry), __u32 callback_time,
++	__u8 state, __u32 delay, __u32 maxdelay, struct mipv6_mh_opt *ops,
++	struct mipv6_rr_info *rr);
++
++int mipv6_bul_delete(struct in6_addr *cn_addr, struct in6_addr *home_addr);
++
++int mipv6_bul_exists(struct in6_addr *cnaddr, struct in6_addr *home_addr);
++
++struct mipv6_bul_entry *mipv6_bul_get(struct in6_addr *cnaddr,
++				      struct in6_addr *home_addr);
++struct mipv6_bul_entry *mipv6_bul_get_by_ccookie(struct in6_addr *cn_addr,
++						 u8 *cookie);
++
++int bul_entry_expired(struct mipv6_bul_entry *bulentry);
++
++void mipv6_bul_reschedule(struct mipv6_bul_entry *entry);
++
++int mipv6_bul_iterate(int (*func)(void *, void *, unsigned long *), void *args);
++
++#endif /* BUL_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/config.h linux-2.4.25/net/ipv6/mobile_ip6/config.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/config.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/config.h	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,72 @@
++/*
++ * Configuration parameters
++ *
++ * $Id$
++ */
++
++#define MIPV6VERSION "D24"
++#define MIPLVERSION "v1.0"
++
++#define CAP_CN	0x01
++#define CAP_HA	0x02
++#define CAP_MN	0x04
++
++struct mip6_conf {
++	int capabilities;
++	int debug_level;
++	int accept_ret_rout;
++	int max_rtr_reachable_time;
++	int eager_cell_switching;
++	int max_num_tunnels;
++	int min_num_tunnels;
++	int binding_refresh_advice;
++	int bu_lladdr;
++	int bu_keymgm;
++	int bu_cn_ack;
++};
++
++extern struct mip6_conf mip6node_cnf;
++
++struct mipv6_bce;
++
++struct mip6_func {
++	void (*bce_home_add) (int ifindex, struct in6_addr *daddr, 
++			      struct in6_addr *haddr, struct in6_addr *coa,
++			      struct in6_addr *rep_coa, __u32 lifetime, 
++			      __u16 sequence, __u8 flags, __u8 *k_bu);
++	void (*bce_cache_add) (int ifindex, struct in6_addr *daddr,
++			       struct in6_addr *haddr, struct in6_addr *coa,
++			       struct in6_addr *rep_coa, __u32 lifetime,
++			       __u16 sequence, __u8 flags, __u8 *k_bu);
++	void (*bce_home_del) (struct in6_addr *daddr, struct in6_addr *haddr, 
++			      struct in6_addr *coa, struct in6_addr *rep_coa,
++			      __u16 sequence, __u8 flags,
++			      __u8 *k_bu);
++	void (*bce_cache_del) (struct in6_addr *daddr, struct in6_addr *haddr, 
++			       struct in6_addr *coa, struct in6_addr *rep_coa,
++			       __u16 sequence, __u8 flags,
++			       __u8 *k_bu);
++	
++	int (*bce_tnl_rt_add) (struct in6_addr *coa, 
++			       struct in6_addr *ha_addr, 
++			       struct in6_addr *home_addr);
++
++	void (*bce_tnl_rt_del) (struct in6_addr *coa, 
++				struct in6_addr *ha_addr, 
++				struct in6_addr *home_addr);
++
++	void (*proxy_del) (struct in6_addr *home_addr, struct mipv6_bce *entry);
++	int (*proxy_create) (int flags, int ifindex, struct in6_addr *coa,
++			     struct in6_addr *our_addr, struct in6_addr *home_addr);
++
++	int (*icmpv6_dhaad_rep_rcv) (struct sk_buff *skb);
++	int (*icmpv6_dhaad_req_rcv) (struct sk_buff *skb);
++	int (*icmpv6_pfxadv_rcv) (struct sk_buff *skb);
++	int (*icmpv6_pfxsol_rcv) (struct sk_buff *skb);
++	int (*icmpv6_paramprob_rcv) (struct sk_buff *skb);
++
++	int (*mn_use_hao) (struct in6_addr *daddr, struct in6_addr *saddr);
++	void (*mn_check_tunneled_packet) (struct sk_buff *skb);
++};
++
++extern struct mip6_func mip6_fn;
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/debug.h linux-2.4.25/net/ipv6/mobile_ip6/debug.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/debug.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/debug.h	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,112 @@
++/*
++ *      MIPL Mobile IPv6 Debugging macros and functions
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _DEBUG_H
++#define _DEBUG_H
++
++#include <linux/autoconf.h>
++
++/* priorities for different debug conditions */
++
++#define DBG_CRITICAL   0 /* unrecoverable error                     */
++#define DBG_ERROR      1 /* error (recoverable)                     */
++#define DBG_WARNING    2 /* unusual situation but not a real error  */
++#define DBG_INFO       3 /* generally useful information            */
++#define DBG_EXTRA      4 /* extra information                       */
++#define DBG_FUNC_ENTRY 6 /* use to indicate function entry and exit */
++#define DBG_DATADUMP   7 /* packet dumps, etc. lots of flood        */
++
++/**
++ * NIPV6ADDR - macro for IPv6 addresses
++ * @addr: Network byte order IPv6 address
++ *
++ * Macro for printing IPv6 addresses.  Used in conjunction with
++ * printk() or derivatives (such as DEBUG macro).
++ **/
++#define NIPV6ADDR(addr) \
++        ntohs(((u16 *)addr)[0]), \
++        ntohs(((u16 *)addr)[1]), \
++        ntohs(((u16 *)addr)[2]), \
++        ntohs(((u16 *)addr)[3]), \
++        ntohs(((u16 *)addr)[4]), \
++        ntohs(((u16 *)addr)[5]), \
++        ntohs(((u16 *)addr)[6]), \
++        ntohs(((u16 *)addr)[7])
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++extern int mipv6_debug;
++
++/**
++ * debug_print - print debug message
++ * @debug_level: message priority
++ * @fname: calling function's name
++ * @fmt: printf-style formatting string
++ *
++ * Prints a debug message to system log if @debug_level is less or
++ * equal to @mipv6_debug.  Should always be called using DEBUG()
++ * macro, not directly.
++ **/
++static void debug_print(int debug_level, const char *fname, const char* fmt, ...)
++{
++	char s[1024];
++	va_list args;
++ 
++	if (mipv6_debug < debug_level)
++		return;
++ 
++	va_start(args, fmt);
++	vsprintf(s, fmt, args);
++	printk("mip6[%s]: %s\n", fname, s);
++	va_end(args);
++}
++
++/**
++ * debug_print_buffer - print arbitrary buffer to system log
++ * @debug_level: message priority
++ * @data: pointer to buffer
++ * @len: number of bytes to print
++ *
++ * Prints @len bytes from buffer @data to system log.  @debug_level
++ * tells on which debug level message gets printed.  For
++ * debug_print_buffer() priority %DBG_DATADUMP should be used.
++ **/
++#define debug_print_buffer(debug_level,data,len) { \
++	if (mipv6_debug >= debug_level) { \
++	int i; \
++	for (i=0; i<len; i++) { \
++		if (i%16 == 0) printk("\n%04x: ", i); \
++		printk("%02x ", ((unsigned char *)data)[i]); \
++	} \
++	printk("\n\n"); \
++	} \
++}
++
++#define DEBUG(x,y,z...) debug_print(x,__FUNCTION__,y,##z)
++#define DEBUG_FUNC() \
++DEBUG(DBG_FUNC_ENTRY, "%s(%d)/%s: ", __FILE__,__LINE__,__FUNCTION__)
++
++#else
++#define DEBUG(x,y,z...)
++#define DEBUG_FUNC()
++#define debug_print_buffer(x,y,z)
++#endif
++
++#undef ASSERT
++#define ASSERT(expression) { \
++        if (!(expression)) { \
++                (void)printk(KERN_ERR \
++                 "Assertion \"%s\" failed: file \"%s\", function \"%s\", line %d\n", \
++                 #expression, __FILE__, __FUNCTION__, __LINE__); \
++		BUG(); \
++        } \
++}
++
++#endif /* _DEBUG_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/exthdrs.c linux-2.4.25/net/ipv6/mobile_ip6/exthdrs.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/exthdrs.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/exthdrs.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,394 @@
++/*
++ *	Extension Header handling and adding code
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>	
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/types.h>
++#include <linux/slab.h>
++
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "debug.h"
++#include "stats.h"
++#include "mobhdr.h"
++#include "bcache.h"
++#include "config.h"
++
++/**
++ * mipv6_append_home_addr - Add Home Address Option
++ * @opt: buffer for Home Address Option
++ * @offset: offset from beginning of @opt
++ * @addr: address for HAO
++ *
++ * Adds a Home Address Option to a packet.  Option is stored in
++ * @offset from beginning of @opt.  The option is created but the
++ * original source address in IPv6 header is left intact.  The source
++ * address will be changed from home address to CoA after the checksum
++ * has been calculated in getfrag.  Padding is done automatically, and
++ * @opt must have allocated space for both actual option and pad.
++ * Returns offset from @opt to end of options.
++ **/
++int mipv6_append_home_addr(__u8 *opt, int offset, struct in6_addr *addr)
++{
++	int pad;
++	struct mipv6_dstopt_homeaddr *ho;
++
++	DEBUG(DBG_DATADUMP, "HAO: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(addr));
++
++	pad = (6 - offset) & 7;
++	mipv6_add_pad(opt + offset, pad);
++
++	ho = (struct mipv6_dstopt_homeaddr *)(opt + offset + pad);
++	ho->type = MIPV6_TLV_HOMEADDR;
++	ho->length = sizeof(*ho) - 2;
++	ipv6_addr_copy(&ho->addr, addr); 
++
++	return offset + pad + sizeof(*ho);
++}
++static inline int check_hao_validity(struct mipv6_dstopt_homeaddr *haopt, 
++				     u8 *dst1, 
++				     struct in6_addr *saddr, 
++				     struct in6_addr *daddr)
++{
++	int addr_type = ipv6_addr_type(&haopt->addr);
++	struct mipv6_bce bc_entry;
++	
++	if (addr_type & IPV6_ADDR_LINKLOCAL || 
++	    !(addr_type & IPV6_ADDR_UNICAST)) {
++		DEBUG(DBG_INFO, "HAO with link local or non-unicast HoA, "
++		      "not sending BE to "
++		      "home address " 
++		      "%x:%x:%x:%x:%x:%x:%x:%x ",
++		      "care-of  address %x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&haopt->addr),
++		      NIPV6ADDR(saddr));
++		return -EINVAL;
++	} else if (dst1[0] != IPPROTO_MOBILITY && 
++	    (mipv6_bcache_get(&haopt->addr, 
++			      daddr, &bc_entry) != 0 ||
++	     ipv6_addr_cmp(saddr, &bc_entry.coa))) {
++		DEBUG(DBG_INFO, "HAO without binding or incorrect CoA, "
++		      "sending BE code 1: "
++		      "home address %x:%x:%x:%x:%x:%x:%x:%x",
++		      "to care-of address %x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&haopt->addr),
++		      NIPV6ADDR(saddr));
++		return -ENOENT;
++	}
++	return 0;
++}
++/**
++ * mipv6_handle_homeaddr - Home Address Destination Option handler
++ * @skb: packet buffer
++ * @optoff: offset to where option begins
++ *
++ * Handles Home Address Option in IPv6 Destination Option header.
++ * Packet and offset to option are passed.  If HAO is used without
++ * binding, sends a Binding Error code 1.  When sending BE, notify bit
++ * is cleared to prevent IPv6 error handling from sending ICMP
++ * Parameter Problem.  Returns 1 on success, otherwise zero.
++ **/
++int mipv6_handle_homeaddr(struct sk_buff *skb, int optoff)
++{
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr coaddr;
++	struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb;
++	struct mipv6_dstopt_homeaddr *haopt =
++	    (struct mipv6_dstopt_homeaddr *) &skb->nh.raw[optoff];
++	u8 *dst1;
++	int err;
++
++	DEBUG_FUNC();
++	
++	if (haopt->length != sizeof(*haopt) - 2) {
++		DEBUG(DBG_WARNING, "HAO has invalid length");
++		MIPV6_INC_STATS(n_ha_drop.invalid);
++		return 0;
++	}
++	dst1 = (u8 *)skb->h.raw;
++	err = check_hao_validity(haopt, dst1, saddr, &skb->nh.ipv6h->daddr);
++
++	if (err) {
++		haopt->type &= ~(0x80); /* clear notify bit */
++		if (err == -ENOENT)
++			mipv6_send_be(&skb->nh.ipv6h->daddr, saddr,
++				      &haopt->addr, MIPV6_BE_HAO_WO_BINDING);
++		MIPV6_INC_STATS(n_ha_drop.misc);
++		return 0;
++	}
++	ipv6_addr_copy(&coaddr, saddr);
++	ipv6_addr_copy(saddr, &haopt->addr);
++	ipv6_addr_copy(&haopt->addr, &coaddr);
++	opt->hao = optoff;
++	if (mip6_fn.mn_check_tunneled_packet != NULL)
++		mip6_fn.mn_check_tunneled_packet(skb);
++
++	MIPV6_INC_STATS(n_ha_rcvd);
++	return 1;
++}
++
++/**
++ * mipv6_icmp_swap_addrs - Switch HAO and src and RT2 and dest for ICMP errors
++ * @skb: packet buffer
++ *
++ * Reset the source address and the Home Address option in skb before
++ * appending it to an ICMP error message, so original packet appears
++ * in the error message rather than mangled.
++ **/
++void mipv6_icmp_swap_addrs(struct sk_buff *skb)
++{
++	struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
++	struct in6_addr tmp;
++	struct in6_addr *hoa;
++	DEBUG_FUNC();
++	if (opt->srcrt2) {
++		struct rt2_hdr *rt2;
++		rt2 = (struct rt2_hdr *)(skb->nh.raw + opt->srcrt2);
++		hoa = &rt2->addr;
++
++		ipv6_addr_copy(&tmp, hoa);
++		ipv6_addr_copy(hoa, &skb->nh.ipv6h->daddr);
++		ipv6_addr_copy(&skb->nh.ipv6h->daddr, &tmp);
++		rt2->rt_hdr.segments_left++;
++		skb->nh.ipv6h->hop_limit++;
++	}
++	if (opt->hao) {
++		struct mipv6_dstopt_homeaddr *hao;
++		hao = (struct mipv6_dstopt_homeaddr *)(skb->nh.raw + opt->hao);
++		hoa = &hao->addr;
++
++		ipv6_addr_copy(&tmp, hoa);
++		ipv6_addr_copy(hoa, &skb->nh.ipv6h->saddr);
++		ipv6_addr_copy(&skb->nh.ipv6h->saddr, &tmp);
++	}
++}
++
++/**
++ * mipv6_append_rt2hdr - Add Type 2 Routing Header
++ * @rt: buffer for new routing header
++ * @addr: intermediate hop address
++ *
++ * Adds a Routing Header Type 2 in a packet.  Stores newly created
++ * routing header in buffer @rt.  Type 2 RT only carries one address,
++ * so there is no need to process old routing header.  @rt must have
++ * allocated space for 24 bytes.
++ **/
++void mipv6_append_rt2hdr(struct ipv6_rt_hdr *rt, struct in6_addr *addr)
++{
++	struct rt2_hdr *rt2 = (struct rt2_hdr *)rt;
++
++        DEBUG(DBG_DATADUMP, "RT2: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(addr));
++
++	if (ipv6_addr_type(addr) == IPV6_ADDR_MULTICAST) {
++		DEBUG(DBG_ERROR, "destination address not unicast");
++		return;
++	}
++
++	memset(rt2, 0, sizeof(*rt2));
++	rt2->rt_hdr.type = 2;
++	rt2->rt_hdr.hdrlen = 2;
++	rt2->rt_hdr.segments_left = 1;
++	ipv6_addr_copy(&rt2->addr, addr);
++}
++
++/**
++ * mipv6_append_dst1opts - Add Destination Option (1) Headers
++ * @dst1opt: buffer for new destination options
++ * @saddr: address for Home Address Option
++ * @old_dst1opt: old destination options
++ * @len: length of options
++ *
++ * Adds Destination Option (1) Header to a packet.  New options are
++ * stored in @dst1opt.  If old destination options exist, they are
++ * copied from @old_dst1opt.  Only Home Address Option is destination
++ * option.  @dstopt must have allocated space for @len bytes.  @len
++ * includes Destination Option Header (2 bytes), Home Address Option
++ * (18 bytes) and possible HAO pad (8n+6).
++ **/
++/*
++ * ISSUE: Home Address Destination Option should really be added to a
++ * new destination option header specified in Mobile IPv6 spec which
++ * should be placed after routing header(s), but before fragmentation
++ * header.  Putting HAO in DO1 works for now, but support for the new
++ * placement should be added to the IPv6 stack.
++ */
++void 
++mipv6_append_dst1opts(struct ipv6_opt_hdr *dst1opt, struct in6_addr *saddr,
++		      struct ipv6_opt_hdr *old_dst1opt, int len)
++{
++	int offset;
++
++	if (old_dst1opt) {
++		memcpy(dst1opt, old_dst1opt, ipv6_optlen(old_dst1opt));
++		offset = ipv6_optlen(old_dst1opt);
++	} else {
++		offset = sizeof (*dst1opt);
++	}
++	dst1opt->hdrlen = (len >> 3) - 1;
++	mipv6_append_home_addr((__u8 *) dst1opt, offset, saddr);
++}
++
++/**
++ * mipv6_modify_txoptions - Modify outgoing packets
++ * @sk: socket
++ * @skb: packet buffer for outgoing packet
++ * @old_opt: transmit options
++ * @fl: packet flow structure
++ * @dst: pointer to destination cache entry
++ *
++ * Adds Home Address Option (for MN packets, when not at home) and
++ * Routing Header Type 2 (for CN packets when sending to an MN) to
++ * data packets.  Old extension headers are copied from @old_opt (if
++ * any).  Extension headers are _explicitly_ added for packets with
++ * Mobility Header.  Returns the new header structure, or old if no
++ * changes.
++ **/
++struct ipv6_txoptions *
++mipv6_modify_txoptions(struct sock *sk, struct sk_buff *skb, 
++		       struct ipv6_txoptions *old_opt, struct flowi *fl, 
++		       struct dst_entry **dst)
++{	
++	struct ipv6_opt_hdr *old_hopopt = NULL;
++	struct ipv6_opt_hdr *old_dst1opt = NULL;
++	struct ipv6_rt_hdr *old_srcrt = NULL;
++
++	int srcrtlen = 0, dst1len = 0;
++	int tot_len, use_hao = 0;
++	struct ipv6_txoptions *opt;
++	struct mipv6_bce bc_entry;
++	struct in6_addr tmpaddr, *saddr, *daddr, coaddr;
++	__u8 *opt_ptr;
++
++	DEBUG_FUNC();
++
++	if (fl->proto == IPPROTO_MOBILITY) return old_opt;
++	/*
++	 * we have to be prepared to the fact that saddr might not be present,
++	 * if that is the case, we acquire saddr just as kernel does.
++	 */
++	saddr = fl ? fl->fl6_src : NULL;
++	daddr = fl ? fl->fl6_dst : NULL;
++
++	if (daddr == NULL)
++		return old_opt;
++	if (saddr == NULL) {
++		int err = ipv6_get_saddr(NULL, daddr, &tmpaddr);
++		if (err)
++			return old_opt;
++		else
++			saddr = &tmpaddr;
++	}
++
++	DEBUG(DBG_DATADUMP,
++	      "dest. address of packet: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(daddr));
++ 	DEBUG(DBG_DATADUMP, " and src. address: %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(saddr));
++
++	if (old_opt) {
++		old_hopopt = old_opt->hopopt;
++		old_dst1opt = old_opt->dst1opt;
++		old_srcrt = old_opt->srcrt;
++	} 
++
++	if (mip6_fn.mn_use_hao != NULL)
++		use_hao = mip6_fn.mn_use_hao(daddr, saddr);
++
++	if (use_hao) {
++		if (old_dst1opt)
++			dst1len = ipv6_optlen(old_dst1opt);
++		dst1len += sizeof(struct mipv6_dstopt_homeaddr) +
++			((6 - dst1len) & 7); /* padding */
++	}
++
++	if (mipv6_bcache_get(daddr, saddr, &bc_entry) == 0)
++		srcrtlen = sizeof(struct rt2_hdr);
++
++	if ((tot_len = srcrtlen + dst1len) == 0) { 
++		return old_opt;
++	}
++
++	tot_len += sizeof(*opt);
++
++	if (!(opt = kmalloc(tot_len, GFP_ATOMIC))) {
++		return NULL;
++	}
++	memset(opt, 0, tot_len);
++	opt->tot_len = tot_len;
++	opt_ptr = (__u8 *) (opt + 1);
++	
++	if (old_srcrt) {
++		opt->srcrt = old_srcrt;
++		opt->opt_nflen += ipv6_optlen(old_srcrt);
++	}
++
++	if (srcrtlen) {
++		DEBUG(DBG_DATADUMP, "Binding exists. Adding routing header");
++
++		opt->srcrt2 = (struct ipv6_rt_hdr *) opt_ptr;
++		opt->opt_nflen += srcrtlen;
++		opt_ptr += srcrtlen;
++		
++		/*
++		 * Append care-of-address to routing header (original
++		 * destination address is home address, the first
++		 * source route segment gets put to the destination
++		 * address and the home address gets to the last
++		 * segment of source route (just as it should)) 
++		 */
++
++		ipv6_addr_copy(&coaddr, &bc_entry.coa);
++
++		mipv6_append_rt2hdr(opt->srcrt2, &coaddr);
++
++		/*
++		 * reroute output (we have to do this in case of TCP
++                 * segment) unless a routing header of type 0 is also added
++		 */
++		if (dst && !opt->srcrt) {
++			struct in6_addr *tmp = fl->fl6_dst;
++			fl->fl6_dst = &coaddr;
++
++			dst_release(*dst);
++			*dst = ip6_route_output(sk, fl);
++			if (skb)
++				skb->dst = *dst;
++			fl->fl6_dst = tmp;
++
++			DEBUG(DBG_DATADUMP, "Rerouted outgoing packet");
++		}
++	}
++
++	/* Only home address option is inserted to first dst opt header */
++	if (dst1len) {
++		opt->dst1opt = (struct ipv6_opt_hdr *) opt_ptr;
++		opt->opt_flen += dst1len;
++		opt_ptr += dst1len;
++		mipv6_append_dst1opts(opt->dst1opt, saddr, 
++				      old_dst1opt, dst1len);
++		opt->mipv6_flags = MIPV6_SND_HAO;
++	} else if (old_dst1opt) {
++		opt->dst1opt = old_dst1opt;
++		opt->opt_flen += ipv6_optlen(old_dst1opt);
++	}
++	if (old_hopopt) {
++		opt->hopopt = old_hopopt;
++		opt->opt_nflen += ipv6_optlen(old_hopopt);
++	}	
++	
++	return opt;
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/exthdrs.h linux-2.4.25/net/ipv6/mobile_ip6/exthdrs.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/exthdrs.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/exthdrs.h	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,47 @@
++/*
++ *	MIPL Mobile IPv6 Extension Headers header file
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MIPV6_EXTHDRS_H
++#define _MIPV6_EXTHDRS_H
++
++struct in6_addr;
++struct sk_buff;
++struct ipv6_rt_hdr;
++struct ipv6_opt_hdr;
++struct ipv6_txoptions;
++struct flowi;
++struct dst_entry;
++/*
++ * Home Address Destination Option function prototypes
++ */
++int mipv6_append_home_addr(__u8 *opt, int offset, struct in6_addr *addr);
++
++int mipv6_handle_homeaddr(struct sk_buff *skb, int optoff);
++
++void mipv6_icmp_swap_addrs(struct sk_buff *skb);
++
++/*
++ * Creates a routing header of type 2.
++ */
++void mipv6_append_rt2hdr(struct ipv6_rt_hdr *srcrt, struct in6_addr *addr);
++
++/* Function to add the first destination option header, which may
++ * include a home address option.  
++ */
++void mipv6_append_dst1opts(struct ipv6_opt_hdr *dst1opt, struct in6_addr *saddr,
++			   struct ipv6_opt_hdr *old_dst1opt, int len);
++
++struct ipv6_txoptions *mipv6_modify_txoptions(
++	struct sock *sk, struct sk_buff *skb,
++	struct ipv6_txoptions *old_opt, struct flowi *fl,
++	struct dst_entry **dst);
++
++#endif /* _MIPV6_EXTHDRS_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/ha.c linux-2.4.25/net/ipv6/mobile_ip6/ha.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/ha.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/ha.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,553 @@
++/*
++ *      Home-agent functionality
++ *
++ *      Authors:
++ *      Sami Kivisaari           <skivisaa@cc.hut.fi>
++ *      Henrik Petander          <lpetande@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *   
++ *      Changes: Venkata Jagana,
++ *               Krishna Kumar     : Statistics fix
++ *               Masahide Nakamura : Use of mipv6_forward  
++ *     
++ */
++
++#include <linux/autoconf.h>
++#include <linux/net.h>
++#include <linux/skbuff.h>
++#include <linux/if_ether.h>
++#include <linux/netdevice.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/netfilter.h>
++#include <linux/netfilter_ipv6.h>
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif
++
++#include <net/neighbour.h>
++#include <net/ipv6.h>
++#include <net/ip6_fib.h>
++#include <net/ip6_route.h>
++#include <net/ndisc.h>
++#include <net/addrconf.h>
++#include <net/neighbour.h>
++
++#include "tunnel_ha.h"
++#include "bcache.h"
++#include "stats.h"
++#include "debug.h"
++#include "util.h"
++#include "ha.h"
++#include "config.h"
++#include "mobhdr.h"
++
++static int mipv6_ha_tunnel_sitelocal = 0;
++
++#ifdef CONFIG_SYSCTL
++
++static struct ctl_table_header *mipv6_ha_sysctl_header;
++
++static struct mipv6_ha_sysctl_table
++{
++	struct ctl_table_header *sysctl_header;
++	ctl_table mipv6_vars[3];
++	ctl_table mipv6_mobility_table[2];
++	ctl_table mipv6_proto_table[2];
++	ctl_table mipv6_root_table[2];
++} mipv6_ha_sysctl = {
++	NULL,
++
++        {{NET_IPV6_MOBILITY_TUNNEL_SITELOCAL, "tunnel_sitelocal",
++	  &mipv6_ha_tunnel_sitelocal, sizeof(int), 0644, NULL, 
++	  &proc_dointvec},
++	 {0}},
++
++	{{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, 
++	  mipv6_ha_sysctl.mipv6_vars}, {0}},
++	{{NET_IPV6, "ipv6", NULL, 0, 0555, 
++	  mipv6_ha_sysctl.mipv6_mobility_table}, {0}},
++	{{CTL_NET, "net", NULL, 0, 0555, 
++	  mipv6_ha_sysctl.mipv6_proto_table}, {0}}
++};
++
++#endif /* CONFIG_SYSCTL */
++
++
++/*  this is defined in kernel IPv6 module (sockglue.c)  */
++extern struct packet_type ipv6_packet_type;
++
++/* mipv6_forward: Intercept NS packets destined to home address of MN */
++int mipv6_forward(struct sk_buff *skb)
++{
++	struct ipv6hdr *ipv6h;
++	struct in6_addr *daddr, *saddr;
++	__u8 nexthdr;
++	int nhoff;
++	
++	if (skb == NULL) return  0;
++	
++	ipv6h = skb->nh.ipv6h;
++	daddr = &ipv6h->daddr;
++	saddr = &ipv6h->saddr;
++
++	nexthdr = ipv6h->nexthdr;
++	nhoff = sizeof(*ipv6h);
++   
++	if (ipv6_ext_hdr(nexthdr))
++		nhoff = ipv6_skip_exthdr(skb, nhoff, &nexthdr,
++					 skb->len - sizeof(*ipv6h));
++	
++	/* Do not to forward Neighbor Solicitation to Home Address of MN */
++	if (nexthdr == IPPROTO_ICMPV6) {
++		struct icmp6hdr *icmp6h;
++		int dest_type;
++		
++		if (nhoff < 0 || !pskb_may_pull(skb, nhoff + 
++						sizeof(struct icmp6hdr))) {
++			kfree_skb(skb);
++			return 0;
++                   }
++		
++		dest_type = ipv6_addr_type(daddr);
++		icmp6h = (struct icmp6hdr *)&skb->nh.raw[nhoff];
++		
++		/* Intercepts NS to HoA of MN */
++
++		if ((icmp6h->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) ||
++		    ((dest_type & IPV6_ADDR_MULTICAST) &&
++		     (icmp6h->icmp6_type == NDISC_ROUTER_ADVERTISEMENT))) {
++			ip6_input(skb);
++		} else {
++			ip6_forward(skb);
++		}
++	} else {
++		ip6_forward(skb);
++	}
++	return 0;
++}
++
++
++/**
++ * mipv6_proxy_nd_rem - stop acting as a proxy for @home_address
++ * @home_addr: address to remove
++ * @ha_addr: home agent's address on home link
++ * @linklocal: link-local compatibility bit
++ *
++ * When Home Agent acts as a proxy for an address it must leave the
++ * solicited node multicast group for that address and stop responding 
++ * to neighbour solicitations.  
++ **/
++static int mipv6_proxy_nd_rem(struct in6_addr *home_addr,
++			      int ifindex, int linklocal)
++{
++        /* When MN returns home HA leaves the solicited mcast groups
++         * for MNs home addresses 
++	 */
++	int err;
++	struct net_device *dev;
++	
++	DEBUG_FUNC();
++	
++        if ((dev = dev_get_by_index(ifindex)) == NULL) {
++		DEBUG(DBG_ERROR, "couldn't get dev");
++		return -ENODEV;
++	}
++#if 1	/* TEST */
++	/* Remove link-local entry */
++	if (linklocal) {
++		struct in6_addr ll_addr;
++		mipv6_generate_ll_addr(&ll_addr, home_addr);
++		if ((err = pneigh_delete(&nd_tbl, &ll_addr, dev)) < 0) {
++			DEBUG(DBG_INFO,
++			      "peigh_delete failed for "
++			      "%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(&ll_addr));	
++		}
++	}
++#endif
++	/* Remove global (or site-local) entry */
++	if ((err = pneigh_delete(&nd_tbl, home_addr, dev)) < 0) {
++		DEBUG(DBG_INFO,
++		      "peigh_delete failed for " 
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(home_addr));
++	}
++	dev_put(dev);
++	return err;
++}
++
++/**
++ * mipv6_proxy_nd - join multicast group for this address
++ * @home_addr: address to defend
++ * @ha_addr: home agent's address on home link
++ * @linklocal: link-local compatibility bit
++ *
++ * While Mobile Node is away from home, Home Agent acts as a proxy for
++ * @home_address. HA responds to neighbour solicitations for  @home_address 
++ * thus getting all packets destined to home address of MN. 
++ **/
++static int mipv6_proxy_nd(struct in6_addr *home_addr, 
++			  int ifindex, int linklocal)
++{  
++	/* The HA sends a proxy ndisc_na message to all hosts on MN's
++	 * home subnet by sending a neighbor advertisement with the
++	 * home address or all addresses of the mobile node if the
++	 * prefix is not 0. The addresses are formed by combining the
++	 * suffix or the host part of the address with each subnet
++	 * prefix that exists in the home subnet 
++	 */
++	
++        /* Since no previous entry for MN exists a proxy_nd advertisement
++	 * is sent to all nodes link local multicast address
++	 */	
++	int err = -1;
++
++	struct net_device *dev;
++	struct in6_addr na_saddr;
++	struct in6_addr ll_addr;
++	struct pneigh_entry *ll_pneigh;
++	struct in6_addr mcdest;
++	int send_ll_na = 0;
++	int inc_opt = 1;
++	int solicited = 0;
++	int override = 1;
++	
++	DEBUG_FUNC();
++	
++	if ((dev = dev_get_by_index(ifindex)) == NULL) {
++		DEBUG(DBG_ERROR, "couldn't get dev");
++		return -ENODEV;
++	}
++	
++	if (!pneigh_lookup(&nd_tbl, home_addr, dev, 1)) {
++		DEBUG(DBG_INFO,
++		      "peigh_lookup failed for "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(home_addr));
++		goto free_dev;
++	}
++#if 1 /* TEST */
++	if (linklocal) {
++		mipv6_generate_ll_addr(&ll_addr, home_addr);
++		
++		if ((ll_pneigh = pneigh_lookup(&nd_tbl, &ll_addr, 
++					       dev, 1)) == NULL) {
++			DEBUG(DBG_INFO,
++			      "peigh_lookup failed for "
++			      "%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(&ll_addr));
++			pneigh_delete(&nd_tbl, home_addr, dev);
++			goto free_dev;
++		} else {
++			send_ll_na = 1;
++		}
++	} else {
++		ll_pneigh = NULL;
++	}
++#endif	
++	/* Proxy neighbor advertisement of MN's home address 
++	 * to all nodes solicited multicast address 
++	 */
++	if (!ipv6_get_lladdr(dev, &na_saddr)) {	
++		ipv6_addr_all_nodes(&mcdest); 
++		ndisc_send_na(dev, NULL, &mcdest, home_addr, 0, 
++			      solicited, override, inc_opt);
++#if 1 /* TEST */
++		if (send_ll_na) {
++			ndisc_send_na(dev, NULL, &mcdest, &ll_addr, 
++				      0, solicited, override, inc_opt);
++		}
++#endif
++		err = 0;
++	} else {
++		DEBUG(DBG_ERROR, "failed to get link local address for sending proxy NA");
++	}
++free_dev:
++	dev_put(dev);
++	return err;
++	
++}
++
++struct inet6_ifaddr *is_on_link_ipv6_address(struct in6_addr *mn_haddr,
++					     struct in6_addr *ha_addr)
++{
++	struct inet6_ifaddr *ifp;
++	struct inet6_dev *in6_dev;
++	struct inet6_ifaddr *oifp = NULL;
++
++	if ((ifp = ipv6_get_ifaddr(ha_addr, 0)) == NULL)
++		return NULL;
++
++	if ((in6_dev = ifp->idev) != NULL) {
++		in6_dev_hold(in6_dev);
++		oifp = in6_dev->addr_list;
++		while (oifp != NULL) {
++			spin_lock(&oifp->lock);
++			if (mipv6_prefix_compare(&oifp->addr, mn_haddr,
++						 oifp->prefix_len) &&
++			    !(oifp->flags & IFA_F_TENTATIVE)) {
++				spin_unlock(&oifp->lock);
++				DEBUG(DBG_INFO, "Home Addr Opt: on-link");
++				in6_ifa_hold(oifp);
++				break;
++			}
++			spin_unlock(&oifp->lock);
++			oifp = oifp->if_next;
++		}
++		in6_dev_put(in6_dev);
++	}
++	in6_ifa_put(ifp);
++/*      DEBUG(DBG_WARNING, "Home Addr Opt NOT on-link"); */
++	return oifp;
++
++}
++
++/*
++ * Lifetime checks. ifp->valid_lft >= ifp->prefered_lft always (see addrconf.c)
++ * Returned value is in seconds.
++ */
++
++static __u32 get_min_lifetime(struct inet6_ifaddr *ifp, __u32 lifetime)
++{
++	__u32 rem_lifetime = 0;
++	unsigned long now = jiffies;
++
++	if (ifp->valid_lft == 0) {
++		rem_lifetime = lifetime;
++	} else {
++		__u32 valid_lft_left =
++		    ifp->valid_lft - ((now - ifp->tstamp) / HZ);
++		rem_lifetime =
++		    min_t(unsigned long, valid_lft_left, lifetime);
++	}
++
++	return rem_lifetime;
++}
++
++#define MAX_LIFETIME 1000
++
++/**
++ * mipv6_lifetime_check - check maximum lifetime is not exceeded
++ * @lifetime: lifetime to check
++ *
++ * Checks @lifetime does not exceed %MAX_LIFETIME.  Returns @lifetime
++ * if not exceeded, otherwise returns %MAX_LIFETIME.
++ **/
++static int mipv6_lifetime_check(int lifetime)
++{
++	return (lifetime > MAX_LIFETIME) ? MAX_LIFETIME : lifetime;
++}
++
++/* Generic routine handling finish of BU processing */
++void mipv6_bu_finish(struct inet6_ifaddr *ifp, int ifindex, __u8 ba_status,
++		     struct in6_addr *daddr, struct in6_addr *haddr,
++		     struct in6_addr *coa, struct in6_addr *rep_coa,
++		     __u32 ba_lifetime, __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	int err;
++
++	if (ba_status >= REASON_UNSPECIFIED) {
++		/* DAD failed */
++		goto out;
++	}
++	
++	ba_lifetime = get_min_lifetime(ifp, ba_lifetime);
++	ba_lifetime = mipv6_lifetime_check(ba_lifetime);
++
++	if ((err = mipv6_bcache_add(ifindex, daddr, haddr, coa, 
++				    ba_lifetime, sequence, flags,
++				    HOME_REGISTRATION)) != 0 ) {
++		DEBUG(DBG_WARNING, "home reg failed.");
++
++		if (err == -ENOMEDIUM)
++			return;
++
++		ba_status = INSUFFICIENT_RESOURCES;
++	} else {
++		DEBUG(DBG_INFO, "home reg succeeded.");
++	}
++
++	DEBUG(DBG_DATADUMP, "home_addr: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(haddr));
++	DEBUG(DBG_DATADUMP, "coa: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(coa));
++	DEBUG(DBG_DATADUMP, "lifet:%d, seq:%d", ba_lifetime, sequence);
++out:
++	mipv6_send_ba(daddr, haddr, coa, rep_coa, ba_status, sequence,
++		      ba_lifetime, k_bu);
++}
++
++static int ha_proxy_create(int flags, int ifindex, struct in6_addr *coa,
++			   struct in6_addr *our_addr, struct in6_addr *home_addr)
++{
++	int ret;
++
++	if ((ret = mipv6_add_tnl_to_mn(coa, our_addr, home_addr)) <= 0) {
++		if (ret != -ENOMEDIUM) {
++			DEBUG(DBG_ERROR, "unable to configure tunnel to MN!");
++		}
++		return -1;
++	}
++	if (mipv6_proxy_nd(home_addr, ifindex, 
++			   flags & MIPV6_BU_F_LLADDR) != 0) {
++		DEBUG(DBG_ERROR, "mipv6_proxy_nd failed!");
++		mipv6_del_tnl_to_mn(coa, our_addr, home_addr);
++		return -2;
++	}
++	return 0;
++}
++
++static void ha_proxy_del(struct in6_addr *home_addr, struct mipv6_bce *entry)
++{
++	if (mipv6_proxy_nd_rem(&entry->home_addr, entry->ifindex,
++			       entry->flags & MIPV6_BU_F_LLADDR) == 0) {
++		DEBUG(DBG_INFO, "proxy_nd succ");
++	} else {
++		DEBUG(DBG_INFO, "proxy_nd fail");
++	}
++	mipv6_del_tnl_to_mn(&entry->coa, &entry->our_addr, home_addr);
++}
++
++static void bc_home_add(int ifindex, 
++			struct in6_addr *daddr, struct in6_addr *haddr, 
++			struct in6_addr *coa, struct in6_addr *rep_coa,
++			__u32 lifetime, __u16 sequence, __u8 flags, 
++			__u8 *k_bu)
++{
++	struct inet6_ifaddr *ifp = NULL;
++	__u8 ba_status = SUCCESS;
++
++	DEBUG_FUNC();
++
++	ifp = is_on_link_ipv6_address(haddr, daddr);
++
++	if (ifp == NULL) {
++		ba_status = NOT_HOME_SUBNET;
++	} else if (((ipv6_addr_type(haddr) & IPV6_ADDR_SITELOCAL) ||
++		    (ipv6_addr_type(coa) & IPV6_ADDR_SITELOCAL))
++		   && !mipv6_ha_tunnel_sitelocal) {
++		/* Site-local home or care-of addresses are not 
++		   accepted by default */
++		ba_status = ADMINISTRATIVELY_PROHIBITED;
++	} else {
++		int ret;
++
++		ifindex = ifp->idev->dev->ifindex;
++
++		if ((ret = mipv6_dad_start(ifp, ifindex, daddr, 
++					   haddr, coa, rep_coa, lifetime,
++					   sequence, flags)) < 0) {
++			/* An error occurred */
++			ba_status = -ret;
++		} else if (ret) {
++			/* DAD is needed to be performed. */
++			in6_ifa_put(ifp);
++			return;
++		}
++	}
++
++	mipv6_bu_finish(ifp, ifindex, ba_status, daddr, haddr, coa, 
++			rep_coa, lifetime, sequence, flags, k_bu);
++	if (ifp)
++		in6_ifa_put(ifp);
++}
++
++static void bc_home_delete(struct in6_addr *daddr, struct in6_addr *haddr, 
++			   struct in6_addr *coa, struct in6_addr *rep_coa, 
++			   __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	__u8 status = SUCCESS;
++	struct mipv6_bce bce;
++
++	/* Primary Care-of Address Deregistration */
++	if (mipv6_bcache_get(haddr, daddr, &bce) < 0) {
++		DEBUG(DBG_INFO, "entry is not in cache");
++		status = NOT_HA_FOR_MN;
++	} else {
++		ha_proxy_del(&bce.home_addr, &bce);
++		mipv6_bcache_delete(haddr, daddr, HOME_REGISTRATION);
++	}
++	mipv6_send_ba(daddr, haddr, coa, rep_coa, status, sequence, 0, k_bu);
++}
++
++extern int mipv6_ra_rcv_ptr(struct sk_buff *skb, struct icmp6hdr *msg);
++
++
++static int
++mipv6_ha_tnl_xmit_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_encapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_ha_tnl_xmit_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_ENCAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_ha_tnl_xmit_stats_hook
++};
++
++static int
++mipv6_ha_tnl_rcv_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_decapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_ha_tnl_rcv_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_DECAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_ha_tnl_rcv_stats_hook
++};
++
++static struct mip6_func old;
++
++int __init mipv6_ha_init(void)
++{
++	DEBUG_FUNC();
++	
++#ifdef CONFIG_SYSCTL
++	if (!(mipv6_ha_sysctl_header = 
++	      register_sysctl_table(mipv6_ha_sysctl.mipv6_root_table, 0)))
++		printk(KERN_ERR "Failed to register sysctl handlers!");
++#endif
++	memcpy(&old, &mip6_fn, sizeof(struct mip6_func));
++	mip6_fn.bce_home_add = bc_home_add;
++	mip6_fn.bce_home_del = bc_home_delete;
++	mip6_fn.proxy_del = ha_proxy_del;
++	mip6_fn.proxy_create = ha_proxy_create;
++	/*  register packet interception hooks  */
++	ip6ip6_tnl_register_hook(&mipv6_ha_tnl_xmit_stats_ops);
++	ip6ip6_tnl_register_hook(&mipv6_ha_tnl_rcv_stats_ops);
++	return 0;
++}
++
++void __exit mipv6_ha_exit(void)
++{
++	DEBUG_FUNC();
++
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_ha_sysctl_header);
++#endif
++
++	/*  remove packet interception hooks  */
++	ip6ip6_tnl_unregister_hook(&mipv6_ha_tnl_rcv_stats_ops);
++	ip6ip6_tnl_unregister_hook(&mipv6_ha_tnl_xmit_stats_ops);
++
++	mip6_fn.bce_home_add = old.bce_home_add;
++	mip6_fn.bce_home_del = old.bce_home_del;
++	mip6_fn.proxy_del = old.proxy_del;
++	mip6_fn.proxy_create = old.proxy_create;
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/ha.h linux-2.4.25/net/ipv6/mobile_ip6/ha.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/ha.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/ha.h	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,39 @@
++/*
++ *      MIPL Mobile IPv6 Home Agent header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HA_H
++#define _HA_H
++
++int mipv6_ha_init(void);
++void mipv6_ha_exit(void);
++
++int mipv6_dad_start(struct inet6_ifaddr *ifp, int ifindex,
++		    struct in6_addr *daddr, struct in6_addr *haddr,
++		    struct in6_addr *coa, struct in6_addr *rep_coa,
++		    __u32 ba_lifetime, __u16 sequence, __u8 flags);
++
++void mipv6_bu_finish(struct inet6_ifaddr *ifp, int ifindex, 
++		     __u8 ba_status, struct in6_addr *daddr,
++		     struct in6_addr *haddr, struct in6_addr *coa, 
++		     struct in6_addr *rep_coa, __u32 ba_lifetime,
++		     __u16 sequence, __u8 flags, __u8 *k_bu);
++
++
++static __inline__ void mipv6_generate_ll_addr(struct in6_addr *ll_addr,
++					      struct in6_addr *addr)
++{
++	ll_addr->s6_addr32[0] = htonl(0xfe800000);
++	ll_addr->s6_addr32[1] = 0;
++	ll_addr->s6_addr32[2] = addr->s6_addr32[2];
++	ll_addr->s6_addr32[3] = addr->s6_addr32[3];
++}
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/halist.c linux-2.4.25/net/ipv6/mobile_ip6/halist.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/halist.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/halist.c	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,507 @@
++/*
++ *      Home Agents List
++ *
++ *      Authors:
++ *      Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#define PREF_BASE 0xffff /* MAX value for u16 field in RA */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/proc_fs.h>
++#include <linux/init.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++
++#include "hashlist.h"
++#include "util.h"
++#include "debug.h"
++
++struct mipv6_halist {
++	struct hashlist *entries;
++	struct timer_list expire_timer;
++};
++
++static rwlock_t home_agents_lock = RW_LOCK_UNLOCKED;
++
++static struct mipv6_halist home_agents;
++
++struct mipv6_halist_entry {
++	struct hashlist_entry e;
++	int ifindex;			 /* Link identifier		*/
++	struct in6_addr link_local_addr; /* HA's link-local address	*/
++	struct in6_addr global_addr;	 /* HA's Global address 	*/
++	int plen;
++	long preference;		 /* The preference for this HA	*/
++	unsigned long expire;		 /* expiration time (jiffies)	*/
++};
++
++static inline void mipv6_ha_ac_add(struct in6_addr *ll_addr, int ifindex,
++				   struct in6_addr *glob_addr, int plen)
++{
++	struct net_device *dev;
++
++	if ((dev = __dev_get_by_index(ifindex)) && ipv6_chk_addr(ll_addr, dev)) {
++		struct in6_addr addr;
++		mipv6_ha_anycast(&addr, glob_addr, plen);
++		ipv6_dev_ac_inc(dev, &addr);
++	}
++}
++
++static inline void mipv6_ha_ac_del(struct in6_addr *ll_addr, int ifindex,
++				   struct in6_addr *glob_addr, int plen)
++{
++	struct net_device *dev;
++
++	if ((dev = __dev_get_by_index(ifindex)) && ipv6_chk_addr(ll_addr, dev)) {
++		struct in6_addr addr;
++		mipv6_ha_anycast(&addr, glob_addr, plen);
++		ipv6_dev_ac_dec(dev, &addr);
++	}
++}
++
++struct preflist_iterator_args {
++	int count;
++	int requested;
++	int ifindex;
++	struct in6_addr *list;
++};
++
++static int preflist_iterator(void *data, void *args,
++			     unsigned long *pref)
++{
++	struct preflist_iterator_args *state =
++		(struct preflist_iterator_args *)args;
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++	struct in6_addr *newaddr =
++		(struct in6_addr *)state->list + state->count;
++
++	if (state->count >= state->requested)
++		return ITERATOR_STOP;
++
++	if (time_after(jiffies, entry->expire)) {
++		if (!ipv6_addr_any(&entry->link_local_addr)) {
++			mipv6_ha_ac_del(&entry->link_local_addr, 
++					entry->ifindex, 
++					&entry->global_addr, entry->plen);
++		}
++		DEBUG(DBG_INFO, "preflist_iterator: Deleting entry with address %x:%x:%x:%x:%x:%x:%x:%x to list", NIPV6ADDR(&entry->global_addr));
++		return ITERATOR_DELETE_ENTRY;
++	}
++	if (state->ifindex != entry->ifindex)
++		return ITERATOR_CONT;
++
++	ipv6_addr_copy(newaddr, &entry->global_addr);
++	DEBUG(DBG_INFO, "preflist_iterator: adding new entry with address %x:%x:%x:%x:%x:%x:%x:%x to list", NIPV6ADDR(&entry->global_addr));
++	state->count++;
++
++	return ITERATOR_CONT;
++}
++
++static int gc_iterator(void *data, void *args,
++		       unsigned long *pref)
++{
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++
++	int *type = (int *)args;
++
++	if (*type == 1 || time_after(jiffies, entry->expire)) {
++		if (!ipv6_addr_any(&entry->link_local_addr)) {
++			mipv6_ha_ac_del(&entry->link_local_addr, 
++					entry->ifindex, 
++					&entry->global_addr, entry->plen);
++		}
++		return ITERATOR_DELETE_ENTRY;
++	}
++
++	return ITERATOR_CONT;
++}
++
++static int mipv6_halist_gc(int type)
++{
++	DEBUG_FUNC();
++	hashlist_iterate(home_agents.entries, &type, gc_iterator);
++	return 0;
++}
++
++static void mipv6_halist_expire(unsigned long dummy)
++{
++	DEBUG_FUNC();
++
++	write_lock(&home_agents_lock);
++	mipv6_halist_gc(0);
++	write_unlock(&home_agents_lock);
++}
++
++
++static struct mipv6_halist_entry *mipv6_halist_new_entry(void)
++{
++	struct mipv6_halist_entry *entry;
++
++	DEBUG_FUNC();
++
++	entry = hashlist_alloc(home_agents.entries, SLAB_ATOMIC);
++
++	return entry;
++}
++
++
++
++/**
++ * mipv6_halist_add - Add new home agent to the Home Agents List
++ * @ifindex: interface identifier
++ * @glob_addr: home agent's global address
++ * @ll_addr: home agent's link-local address
++ * @pref: relative preference for this home agent
++ * @lifetime: lifetime for the entry
++ *
++ * Adds new home agent to the Home Agents List.  The list is interface
++ * specific and @ifindex tells through which interface the home agent
++ * was heard.  Returns zero on success and negative on failure.
++ **/
++
++int mipv6_halist_add(int ifindex, struct in6_addr *glob_addr, int plen,
++		     struct in6_addr *ll_addr, unsigned int pref, __u32 lifetime)
++{
++	int update = 0, ret = 0;
++	unsigned int mpref;
++	struct mipv6_halist_entry *entry = NULL;
++
++	DEBUG_FUNC();
++
++	write_lock(&home_agents_lock);
++
++	if (glob_addr == NULL || lifetime <= 0) {
++		DEBUG(DBG_WARNING, "invalid arguments");
++		ret = -EINVAL;
++		goto out;
++	}
++	mpref = PREF_BASE - pref;
++	if ((entry = (struct mipv6_halist_entry *)
++	     hashlist_get(home_agents.entries, glob_addr)) != NULL) {
++		if (entry->ifindex == ifindex) {
++			DEBUG(DBG_DATADUMP, "updating old entry with address %x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(glob_addr));
++			update = 1;
++		} else {
++			DEBUG(DBG_INFO, "halist_add : adding new entry with address %x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(glob_addr));
++			update = 0;
++		}
++	}
++	if (update) {
++		entry->expire = jiffies + lifetime * HZ;
++		if (entry->preference != mpref) {
++			entry->preference = mpref;
++			ret = hashlist_reposition(home_agents.entries, 
++						  (void *)entry, mpref);
++		}
++	} else {
++		entry = mipv6_halist_new_entry();
++		if (entry == NULL) {
++			DEBUG(DBG_INFO, "list full");
++			ret = -ENOMEM;
++			goto out;
++		}
++		entry->ifindex = ifindex;
++		if (ll_addr) {
++			ipv6_addr_copy(&entry->link_local_addr, ll_addr);
++			mipv6_ha_ac_add(ll_addr, ifindex, glob_addr, plen);
++		} else
++			ipv6_addr_set(&entry->link_local_addr, 0, 0, 0, 0);
++
++		ipv6_addr_copy(&entry->global_addr, glob_addr);
++		entry->plen = plen;
++		entry->preference = mpref;
++		entry->expire = jiffies + lifetime * HZ;
++		ret = hashlist_add(home_agents.entries, glob_addr, mpref, 
++				   entry);
++	}
++out:
++	write_unlock(&home_agents_lock);
++	return ret;
++}
++
++/**
++ * mipv6_halist_delete - delete home agent from Home Agents List
++ * @glob_addr: home agent's global address
++ *
++ * Deletes entry for home agent @glob_addr from the Home Agent List.
++ **/
++int mipv6_halist_delete(struct in6_addr *glob_addr)
++{
++	struct hashlist_entry *e;
++	struct mipv6_halist_entry *entry;
++	DEBUG_FUNC();
++
++	if (glob_addr == NULL) {
++		DEBUG(DBG_WARNING, "invalid glob addr");
++		return -EINVAL;
++	}
++	write_lock(&home_agents_lock);
++	if ((e = hashlist_get(home_agents.entries, glob_addr)) == NULL) {
++		write_unlock(&home_agents_lock);
++		return -ENOENT;
++	}
++	hashlist_delete(home_agents.entries, e);
++	entry = (struct mipv6_halist_entry *)e;
++	if (!ipv6_addr_any(&entry->link_local_addr)) {
++		mipv6_ha_ac_del(&entry->link_local_addr, entry->ifindex, 
++				&entry->global_addr, entry->plen);
++	}
++	hashlist_free(home_agents.entries, e);
++	write_unlock(&home_agents_lock);
++	return 0;
++}
++
++/**
++ * mipv6_ha_get_pref_list - Get list of preferred home agents
++ * @ifindex: interface identifier
++ * @addrs: pointer to a buffer to store the list
++ * @max: maximum number of home agents to return
++ *
++ * Creates a list of @max preferred (or all known if less than @max)
++ * home agents.  Home Agents List is interface specific so you must
++ * supply @ifindex.  Stores list in addrs and returns number of home
++ * agents stored.  On failure, returns a negative value.
++ **/
++int mipv6_ha_get_pref_list(int ifindex, struct in6_addr **addrs, int max)
++{
++	struct preflist_iterator_args args;
++
++	DEBUG_FUNC();
++	if (max <= 0) {
++		*addrs = NULL;
++		return 0;
++	}
++
++	args.count = 0;
++	args.requested = max;
++	args.ifindex = ifindex;
++	args.list = kmalloc(max * sizeof(struct in6_addr), GFP_ATOMIC);
++
++	if (args.list == NULL) return -ENOMEM;
++
++	read_lock(&home_agents_lock);
++	hashlist_iterate(home_agents.entries, &args, preflist_iterator);
++	read_unlock(&home_agents_lock);
++
++	if (args.count >= 0) {
++		*addrs = args.list;
++	} else {
++		kfree(args.list);
++		*addrs = NULL;
++	}
++
++	return args.count;
++}
++
++struct getaddr_iterator_args {
++	struct net_device *dev;
++	struct in6_addr *addr;
++};
++
++static int getaddr_iterator(void *data, void *args,
++	     unsigned long *pref)
++{
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++	struct getaddr_iterator_args *state =
++		(struct getaddr_iterator_args *)args;
++
++	if (entry->ifindex != state->dev->ifindex)
++		return ITERATOR_CONT;
++
++	if (ipv6_chk_addr(&entry->global_addr, state->dev)) {
++		ipv6_addr_copy(state->addr, &entry->global_addr);
++		return ITERATOR_STOP;
++	}
++	return ITERATOR_CONT;
++}
++
++/*
++ * Get Home Agent Address for given interface.  If node is not serving
++ * as a HA for this interface returns negative error value.
++ */
++int mipv6_ha_get_addr(int ifindex, struct in6_addr *addr)
++{
++	struct getaddr_iterator_args args;
++	struct net_device *dev;
++
++	if (ifindex <= 0)
++		return -EINVAL;
++
++	if ((dev = dev_get_by_index(ifindex)) == NULL)
++		return -ENODEV;
++
++	memset(addr, 0, sizeof(struct in6_addr));
++	args.dev = dev;
++	args.addr = addr;
++	read_lock(&home_agents_lock);
++	hashlist_iterate(home_agents.entries, &args, getaddr_iterator);
++	read_unlock(&home_agents_lock);
++	dev_put(dev);
++
++	if (ipv6_addr_any(addr))
++		return -ENOENT;
++	
++	return 0;
++}
++
++#define HALIST_INFO_LEN 81
++
++struct procinfo_iterator_args {
++	char *buffer;
++	int offset;
++	int length;
++	int skip;
++	int len;
++};
++
++static int procinfo_iterator(void *data, void *args,
++			     unsigned long *pref)
++{
++	struct procinfo_iterator_args *arg =
++		(struct procinfo_iterator_args *)args;
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++	unsigned long int expire;
++
++	DEBUG_FUNC();
++
++	if (entry == NULL) return ITERATOR_ERR;
++
++	if (time_after(jiffies, entry->expire)) {
++		if (!ipv6_addr_any(&entry->link_local_addr)) {
++			mipv6_ha_ac_del(&entry->link_local_addr, 
++					entry->ifindex, 
++					&entry->global_addr, entry->plen);
++		}
++		return ITERATOR_DELETE_ENTRY;
++	}
++	if (arg->skip < arg->offset / HALIST_INFO_LEN) {
++		arg->skip++;
++		return ITERATOR_CONT;
++	}
++
++	if (arg->len >= arg->length)
++		return ITERATOR_CONT;
++
++	expire = (entry->expire - jiffies) / HZ;
++
++	arg->len += sprintf(arg->buffer + arg->len, 
++			    "%02d %08x%08x%08x%08x %08x%08x%08x%08x %05ld %05ld\n",
++			    entry->ifindex,
++			    ntohl(entry->global_addr.s6_addr32[0]),
++			    ntohl(entry->global_addr.s6_addr32[1]),
++			    ntohl(entry->global_addr.s6_addr32[2]),
++			    ntohl(entry->global_addr.s6_addr32[3]),
++			    ntohl(entry->link_local_addr.s6_addr32[0]),
++			    ntohl(entry->link_local_addr.s6_addr32[1]),
++			    ntohl(entry->link_local_addr.s6_addr32[2]),
++			    ntohl(entry->link_local_addr.s6_addr32[3]),
++			    -(entry->preference - PREF_BASE), expire);
++
++	return ITERATOR_CONT;
++}
++
++static int halist_proc_info(char *buffer, char **start, off_t offset,
++                            int length)
++{
++	struct procinfo_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.buffer = buffer;
++	args.offset = offset;
++	args.length = length;
++	args.skip = 0;
++	args.len = 0;
++
++	read_lock_bh(&home_agents_lock);
++	hashlist_iterate(home_agents.entries, &args, procinfo_iterator);
++	read_unlock_bh(&home_agents_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % HALIST_INFO_LEN;
++
++	args.len -= offset % HALIST_INFO_LEN;
++
++	if (args.len > length)
++		args.len = length;
++	if (args.len < 0)
++		args.len = 0;
++	
++	return args.len;
++}
++
++static int halist_compare(void *data, void *hashkey)
++{
++	struct mipv6_halist_entry *e = (struct mipv6_halist_entry *)data;
++	struct in6_addr *key = (struct in6_addr *)hashkey;
++
++	return ipv6_addr_cmp(&e->global_addr, key);
++}
++
++static __u32 halist_hash(void *hashkey)
++{
++	struct in6_addr *key = (struct in6_addr *)hashkey;
++	__u32 hash;
++
++	hash = key->s6_addr32[0] ^
++                key->s6_addr32[1] ^
++                key->s6_addr32[2] ^
++                key->s6_addr32[3];
++
++	return hash;
++}
++
++int __init mipv6_halist_init(__u32 size)
++{
++	DEBUG_FUNC();
++
++	if (size <= 0) {
++		DEBUG(DBG_ERROR, "size must be at least 1");
++		return -EINVAL;
++	}
++	init_timer(&home_agents.expire_timer);
++	home_agents.expire_timer.data = 0;
++	home_agents.expire_timer.function = mipv6_halist_expire;
++	home_agents_lock = RW_LOCK_UNLOCKED;
++
++	home_agents.entries = hashlist_create(16, size, sizeof(struct mipv6_halist_entry),
++					       "mip6_halist", NULL, NULL,
++					       halist_compare, halist_hash);
++
++	if (home_agents.entries == NULL) {
++		DEBUG(DBG_ERROR, "Failed to initialize hashlist");
++		return -ENOMEM;
++	}
++
++	proc_net_create("mip6_home_agents", 0, halist_proc_info);
++	DEBUG(DBG_INFO, "Home Agents List initialized");
++	return 0;
++}
++
++void __exit mipv6_halist_exit(void)
++{
++	DEBUG_FUNC();
++	proc_net_remove("mip6_home_agents");
++	write_lock_bh(&home_agents_lock);
++	DEBUG(DBG_INFO, "Stopping the halist timer");
++	del_timer(&home_agents.expire_timer);
++	mipv6_halist_gc(1);
++	write_unlock_bh(&home_agents_lock);
++	hashlist_destroy(home_agents.entries);
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/halist.h linux-2.4.25/net/ipv6/mobile_ip6/halist.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/halist.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/halist.h	2004-06-26 11:29:30.000000000 +0100
+@@ -0,0 +1,28 @@
++/*
++ *      MIPL Mobile IPv6 Home Agents List header file      
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HALIST_H
++#define _HALIST_H
++
++int mipv6_halist_init(__u32 size);
++
++void mipv6_halist_exit(void);
++
++int mipv6_halist_add(int ifindex, struct in6_addr *glob_addr, int plen,
++		     struct in6_addr *ll_addr, unsigned int pref, __u32 lifetime);
++
++int mipv6_halist_delete(struct in6_addr *glob_addr);
++
++int mipv6_ha_get_pref_list(int ifindex, struct in6_addr **addrs, int max);
++
++int mipv6_ha_get_addr(int ifindex, struct in6_addr *addr);
++
++#endif /* _HALIST_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/hashlist.c linux-2.4.25/net/ipv6/mobile_ip6/hashlist.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/hashlist.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/hashlist.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,351 @@
++/*
++ *	Generic hashtable with chaining.  Supports secodary sort order
++ *	with doubly linked-list.
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *	Antti Tuominen		<ajtuomin@tml.hut.fi>
++ *
++ *	$Id: s.hashlist.c 1.21 02/10/07 19:31:52+03:00 antti@traci.mipl.mediapoli.com $
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License as
++ *	published by the Free Software Foundation; either version 2 of
++ *	the License, or (at your option) any later version.
++ */
++
++#include <linux/slab.h>
++#include "hashlist.h"
++#include "debug.h"
++
++struct hashlist {
++	int count;		/* entry count	*/
++	int maxcount;		/* max entries	*/
++	__u32 bucketnum;	/* hash buckets	*/
++
++	kmem_cache_t *kmem;
++
++	struct list_head *hashtable;
++	struct list_head sortedlist;
++
++	int (*compare)(void *data, void *hashkey);
++	__u32 (*hash_function)(void *hashkey);
++};
++
++/**
++ * hashlist_create - Create new hashlist
++ * @bucketnum: number of hash buckets
++ * @maxentries: maximum number of entries (0 = no limit)
++ * @size: entry size in bytes
++ * @name: name for kmem_cache_t
++ * @ctor: kmem_cache_t constructor
++ * @dtor: kmem_cache_t destructor
++ * @compare: compare function for key
++ * @hash_function: hash function
++ *
++ * Creates a hashlist structure with @max_entries entries of @size
++ * bytes.  User must supply @hash_function and @compare function for
++ * the hashlist.  User can also supply @ctor and @dtor for kmem_cache.
++ **/
++struct hashlist *hashlist_create(int bucketnum, int max_entries, size_t size,
++				 char *name,
++				 void (*ctor)(void *, kmem_cache_t *, unsigned long),
++				 void (*dtor)(void *, kmem_cache_t *, unsigned long),
++				 int (*compare)(void *data, void *hashkey),
++				 __u32 (*hash_function)(void *hashkey))
++{
++	int i;
++	struct hashlist *hl;
++
++	if (!compare || !hash_function)
++		goto hlfailed;
++
++	hl = kmalloc(sizeof(struct hashlist), GFP_ATOMIC);
++	if (!hl) goto hlfailed;
++
++	hl->kmem = kmem_cache_create(name, size, 0, 0, ctor, dtor);
++	if (!hl->kmem) goto poolfailed;
++
++	hl->hashtable = kmalloc(
++		sizeof(struct list_head) * bucketnum, GFP_ATOMIC);
++	if (!hl->hashtable) goto hashfailed;
++
++	for (i = 0; i < bucketnum; i++)
++		INIT_LIST_HEAD(&hl->hashtable[i]);
++
++	INIT_LIST_HEAD(&hl->sortedlist);
++
++	hl->maxcount = max_entries;
++	hl->count = 0;
++	hl->bucketnum = bucketnum;
++	hl->compare = compare;
++	hl->hash_function = hash_function;
++
++	return hl;
++
++hashfailed:
++	kmem_cache_destroy(hl->kmem);
++	hl->kmem = NULL;
++
++poolfailed:
++	kfree(hl);
++
++hlfailed:
++	DEBUG(DBG_ERROR, "could not create hashlist");
++
++	return NULL;	
++}
++
++/**
++ * hashlist_destroy - Destroy hashlist
++ * @hashlist: hashlist to destroy
++ *
++ * Frees all memory allocated for a hashlist.
++ **/
++void hashlist_destroy(struct hashlist *hashlist)
++{
++	DEBUG_FUNC();
++
++	if (hashlist == NULL) return;
++
++	if (hashlist->hashtable) {
++		kfree(hashlist->hashtable);
++		hashlist->hashtable = NULL;
++	}
++
++	if (hashlist->kmem) {
++		kmem_cache_destroy(hashlist->kmem);
++		hashlist->kmem = NULL;
++	}
++
++	kfree(hashlist);
++
++	return;
++}
++
++/*
++ * Insert a chain of entries to hashlist into correct order.  The
++ * entries are assumed to have valid hashkeys.  We use time_after_eq
++ * for comparing, since it handles wrap-around correctly, and the
++ * sortkey is usually jiffies.
++ */
++static void sorted_insert(struct list_head *lh, struct hashlist_entry *he)
++{
++	struct list_head *p;
++	struct hashlist_entry *hlp = NULL;
++	unsigned long sortkey = he->sortkey;
++
++	if (list_empty(lh)) {
++		list_add(&he->sorted, lh);
++		return;
++	}
++	
++	list_for_each(p, lh) {
++		hlp = list_entry(p, typeof(*hlp), sorted);
++		if (time_after_eq(hlp->sortkey, sortkey)) {
++			list_add(&he->sorted, hlp->sorted.prev);
++			return;
++		}
++	}
++	list_add(&he->sorted, &hlp->sorted);
++}
++
++/**
++ * hashlist_iterate - Apply function for all elements in a hash list
++ * @hashlist: pointer to hashlist
++ * @args: data to pass to the function
++ * @func: pointer to a function
++ *
++ * Apply arbitrary function @func to all elements in a hash list.
++ * @func must be a pointer to a function with the following prototype:
++ * int func(void *entry, void *arg, struct in6_addr *hashkey, unsigned
++ * long *sortkey).  Function must return %ITERATOR_STOP,
++ * %ITERATOR_CONT or %ITERATOR_DELETE_ENTRY.  %ITERATOR_STOP stops
++ * iterator and returns last return value from the function.
++ * %ITERATOR_CONT continues with iteration.  %ITERATOR_DELETE_ENTRY
++ * deletes current entry from the hashlist.  If function changes
++ * hashlist element's sortkey, iterator automatically schedules
++ * element to be reinserted after all elements have been processed.
++ */
++int hashlist_iterate(
++	struct hashlist *hashlist, void *args,
++	hashlist_iterator_t func)
++{
++	int res = ITERATOR_CONT;
++	unsigned long skey;
++	struct list_head *p, *n, repos;
++	struct hashlist_entry *he;
++
++	DEBUG_FUNC();
++	INIT_LIST_HEAD(&repos);
++
++	list_for_each_safe(p, n, &hashlist->sortedlist) {
++		he = list_entry(p, typeof(*he), sorted);
++		if (res == ITERATOR_STOP)
++			break;
++		skey = he->sortkey;
++		res = func(he, args, &he->sortkey);
++		if (res == ITERATOR_DELETE_ENTRY) {
++			hashlist_delete(hashlist, he);
++			hashlist_free(hashlist, he);
++		} else if (skey != he->sortkey) {
++			/* iterator changed the sortkey, schedule for
++			 * repositioning */
++			list_move(&he->sorted, &repos);
++		}
++	}
++	list_for_each_safe(p, n, &repos) {	
++		he = list_entry(p, typeof(*he), sorted);
++		sorted_insert(&hashlist->sortedlist, he);
++	}
++	return res;
++}
++
++/**
++ * hashlist_alloc - Allocate memory for a hashlist entry
++ * @hashlist: hashlist for allocated entry
++ * @size: size of entry in bytes
++ *
++ * Allocates @size bytes memory from @hashlist->kmem.
++ **/
++void *hashlist_alloc(struct hashlist *hashlist, int type)
++{
++	if (hashlist == NULL) return NULL;
++	return kmem_cache_alloc(hashlist->kmem, type);
++}
++
++/**
++ * hashlist_free - Free hashlist entry
++ * @hashlist: hashlist where @he is
++ * @he: entry to free
++ *
++ * Frees an allocated hashlist entry.
++ **/
++void hashlist_free(struct hashlist *hashlist, struct hashlist_entry *he)
++{
++	kmem_cache_free(hashlist->kmem, he);
++}
++
++/**
++ * hashlist_add - Add element to hashlist
++ * @hashlist: pointer to hashlist
++ * @hashkey: hashkey for the element
++ * @sortkey: key for sorting
++ * @data: element data
++ *
++ * Add element to hashlist.  Hashlist is also sorted in a linked list
++ * by @sortkey.
++ */
++int hashlist_add(struct hashlist *hashlist, void *hashkey,
++		 unsigned long sortkey, void *entry)
++{
++	struct hashlist_entry *he = (struct hashlist_entry *)entry;
++	unsigned int hash;
++
++	if (hashlist->count >= hashlist->maxcount)
++		return -1;
++
++	hashlist->count++;
++
++	/*  link the entry to sorted order  */ 
++	he->sortkey = sortkey;
++	sorted_insert(&hashlist->sortedlist, he);
++
++	/*  hash the entry  */
++	hash = hashlist->hash_function(hashkey) % hashlist->bucketnum;
++	list_add(&he->hashlist, &hashlist->hashtable[hash]);
++
++	return 0;
++}
++
++/**
++ * hashlist_get_ex - Get element from hashlist
++ * @hashlist: hashlist
++ * @hashkey: hashkey of the desired entry
++ *
++ * Lookup entry with @hashkey from the hash table using @compare
++ * function for entry comparison.  Returns entry on success, otherwise
++ * %NULL.
++ **/
++struct hashlist_entry *hashlist_get_ex(
++	struct hashlist *hashlist, void *hashkey,
++	int (*compare)(void *data, void *hashkey))
++{
++	struct list_head *p, *bkt;
++	__u32 hash;
++
++	hash = hashlist->hash_function(hashkey) % hashlist->bucketnum;
++	bkt = &hashlist->hashtable[hash];
++
++	/*  scan the entries within the same hashbucket  */
++	list_for_each(p, bkt) {
++		struct hashlist_entry *he = list_entry(p, typeof(*he), 
++						       hashlist);
++		if (compare(he, hashkey) == 0)
++			return he;
++	}
++
++	return NULL;
++}
++
++/**
++ * hashlist_get - Get element from hashlist
++ * @hashlist: hashlist
++ * @hashkey: hashkey of the desired entry
++ *
++ * Lookup entry with @hashkey from the hash table.  Returns entry on
++ * success, otherwise %NULL.
++ **/
++struct hashlist_entry *hashlist_get(struct hashlist *hashlist, void *hashkey)
++{
++	return hashlist_get_ex(hashlist, hashkey, hashlist->compare);
++}
++
++/**
++ * hashlist_reposition - set entry to new position in the list
++ * @hashlist: hashlist
++ * @he: entry to reposition
++ * @sortkey: new sortkey of the entry
++ *
++ * If secondary order sortkey changes, entry must be repositioned in
++ * the sorted list.
++ **/
++int hashlist_reposition(struct hashlist *hashlist, struct hashlist_entry *he,
++			unsigned long sortkey)
++{
++	list_del(&he->sorted);
++	he->sortkey = sortkey;
++	sorted_insert(&hashlist->sortedlist, he);
++
++	return 0;
++}
++
++/**
++ * hashlist_delete - Delete entry from hashlist
++ * @hashlist: hashlist where entry is
++ * @he: entry to delete
++ *
++ * Deletes an entry from the hashlist and sorted list.
++ **/
++void hashlist_delete(struct hashlist *hashlist,
++		     struct hashlist_entry *he)
++{
++	list_del_init(&he->hashlist);
++	list_del_init(&he->sorted);
++
++	hashlist->count--;
++}
++
++/**
++ * hashlist_get_first - Get first item from sorted list
++ * @hashlist: pointer to hashlist
++ *
++ * Returns first item in the secondary sort order.
++ **/
++void * hashlist_get_first(struct hashlist *hashlist)
++{
++	if (list_empty(&hashlist->sortedlist))
++		return NULL;
++	
++	return list_entry(hashlist->sortedlist.next, struct hashlist_entry, sorted);
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/hashlist.h linux-2.4.25/net/ipv6/mobile_ip6/hashlist.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/hashlist.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/hashlist.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,63 @@
++/*
++ *	MIPL Mobile IPv6 Hashlist header file
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HASHLIST_H
++#define _HASHLIST_H
++
++#define ITERATOR_ERR -1
++#define ITERATOR_CONT 0
++#define ITERATOR_STOP 1
++#define ITERATOR_DELETE_ENTRY 2
++
++struct kmem_cache_t;
++
++struct hashlist_entry {
++	unsigned long sortkey;
++	struct list_head sorted;
++	struct list_head hashlist;
++};
++
++struct hashlist * hashlist_create(
++	int bucketnum, int max_entries, size_t size, char *name,
++	void (*ctor)(void *, kmem_cache_t *, unsigned long),
++	void (*dtor)(void *, kmem_cache_t *, unsigned long),
++	int (*compare)(void *data, void *hashkey),
++	__u32 (*hash_function)(void *hashkey));
++
++void hashlist_destroy(struct hashlist *hashlist);
++
++void *hashlist_alloc(struct hashlist *hashlist, int type);
++
++void hashlist_free(struct hashlist *hashlist, struct hashlist_entry *he);
++
++struct hashlist_entry *hashlist_get(struct hashlist *hashlist, void *hashkey);
++
++struct hashlist_entry *hashlist_get_ex(
++	struct hashlist *hashlist, void *hashkey,
++	int (*compare)(void *data, void *hashkey));
++
++int hashlist_add(struct hashlist *hashlist, void *hashkey,
++		 unsigned long sortkey, void *data);
++
++void hashlist_delete(struct hashlist *hashlist, struct hashlist_entry *he);
++
++/* iterator function */
++typedef int (*hashlist_iterator_t)(void *, void *, unsigned long *);
++
++int hashlist_iterate(struct hashlist *hashlist, void *args,
++		     hashlist_iterator_t func);
++
++void * hashlist_get_first(struct hashlist *hashlist);
++
++int hashlist_reposition(struct hashlist *hashlist, struct hashlist_entry *he,
++			unsigned long sortkey);
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/hmac.c linux-2.4.25/net/ipv6/mobile_ip6/hmac.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/hmac.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/hmac.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,658 @@
++/*     Authentication algorithms       
++ *	
++ *      Authors: 
++ *       Alexis Olivereau              <Alexis.Olivereau@crm.mot.com>
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ *      Changes: 
++ *      Henrik Petander     :     Cleaned up unused parts
++ *
++ */
++
++#include <linux/sched.h>
++#include <linux/tty.h>
++#include <linux/types.h>
++#include <linux/slab.h>
++#include <linux/in6.h>
++
++#include "hmac.h"
++#define LROLL(x, s) (((x) << (s)) | ((x) >> (32 - (s))))
++
++/* MD5 */
++#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
++#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
++#define H(x, y, z) ((x) ^ (y) ^ (z))
++#define I(x, y, z) ((y) ^ ((x) | ~(z)))
++
++#define FF(a, b, c, d, m, s, t) { \
++ (a) += F ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++#define GG(a, b, c, d, m, s, t) { \
++ (a) += G ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++#define HH(a, b, c, d, m, s, t) { \
++ (a) += H ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++#define II(a, b, c, d, m, s, t) { \
++ (a) += I ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++
++#define s11  7
++#define s12 12
++#define s13 17
++#define s14 22
++#define s21  5
++#define s22  9
++#define s23 14
++#define s24 20
++#define s31  4
++#define s32 11
++#define s33 16
++#define s34 23
++#define s41  6
++#define s42 10
++#define s43 15
++#define s44 21
++
++/* SHA-1 */
++#define f(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
++#define g(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
++#define h(x, y, z) ((x) ^ (y) ^ (z))
++
++#define K1 0x5a827999
++#define K2 0x6ed9eba1
++#define K3 0x8f1bbcdc
++#define K4 0xca62c1d6
++
++int ah_hmac_md5_init(struct ah_processing *ahp, u_int8_t *key, u_int32_t key_len)
++{
++	int i;
++	int key_up4;
++	uint32_t ipad = 0x36363636;
++	uint8_t extkey[64];
++
++	ahp->key_auth = key;
++	ahp->key_auth_len = key_len;
++	ahp->context = (void *) kmalloc(sizeof(MD5_CTX), GFP_ATOMIC);
++	if (ahp->context == NULL)
++		return -1;
++	md5_init((MD5_CTX *) ahp->context);
++	if ((64 * sizeof(uint8_t)) < ahp->key_auth_len) {
++		printk("buffer overflow!");
++		return -1;
++	}
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ ipad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = ipad;
++
++	md5_compute((MD5_CTX *) ahp->context, extkey, 64);
++	return 0;
++}
++
++void ah_hmac_md5_loop(struct ah_processing *ahp, void *str, uint32_t len)
++{
++	md5_compute((MD5_CTX *) ahp->context, str, len);
++}
++
++void ah_hmac_md5_result(struct ah_processing *ahp, char *digest)
++{
++	uint8_t inner[HMAC_MD5_HASH_LEN];
++	int i;
++	int key_up4;
++	uint32_t opad = 0x5c5c5c5c;
++	uint8_t extkey[64];
++
++	md5_final((MD5_CTX *) ahp->context, inner);
++	md5_init((MD5_CTX *) ahp->context);
++
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ opad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = opad;
++
++	md5_compute((MD5_CTX *) ahp->context, extkey, 64);
++	md5_compute((MD5_CTX *) ahp->context, inner, HMAC_MD5_HASH_LEN);
++
++	md5_final((MD5_CTX *) ahp->context, digest);
++
++	kfree(ahp->context);
++}
++
++int ah_hmac_sha1_init(struct ah_processing *ahp, u_int8_t *key, u_int32_t key_len)
++{
++	int i;
++	int key_up4;
++	uint32_t ipad = 0x36363636;
++	uint8_t extkey[64];
++
++	ahp->key_auth = key;
++	ahp->key_auth_len = key_len;
++
++	ahp->context = (void *) kmalloc(sizeof(SHA1_CTX), GFP_ATOMIC);
++	//if (ahp->context == NULL)
++	//	return -1;
++
++	sha1_init((SHA1_CTX *) ahp->context);
++
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ ipad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = ipad;
++
++	sha1_compute((SHA1_CTX *) ahp->context, extkey, 64);
++	return 0;
++}
++
++void ah_hmac_sha1_loop(struct ah_processing *ahp, void *str, uint32_t len)
++{
++	if (!ahp)
++		return;
++	sha1_compute((SHA1_CTX *) ahp->context, str, len);
++}
++
++void ah_hmac_sha1_result(struct ah_processing *ahp, char *digest)
++{
++	uint8_t inner[HMAC_SHA1_HASH_LEN];
++	int i;
++	int key_up4;
++	uint32_t opad = 0x5c5c5c5c;
++	uint8_t extkey[64];
++
++	if (!ahp)
++		return;
++	sha1_final((SHA1_CTX *) ahp->context, inner);
++	sha1_init((SHA1_CTX *) ahp->context);
++
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ opad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = opad;
++
++	sha1_compute((SHA1_CTX *) ahp->context, extkey, 64);
++	sha1_compute((SHA1_CTX *) ahp->context, inner,
++		     HMAC_SHA1_HASH_LEN);
++
++	sha1_final((SHA1_CTX *) ahp->context, digest);
++
++	kfree(ahp->context);
++}
++
++void md5_init(MD5_CTX * ctx)
++{
++	ctx->A = 0x67452301;
++	ctx->B = 0xefcdab89;
++	ctx->C = 0x98badcfe;
++	ctx->D = 0x10325476;
++	ctx->buf_cur = ctx->buf;
++	ctx->bitlen[0] = ctx->bitlen[1] = 0;
++	memset(ctx->buf, 0, 64);
++}
++
++void md5_over_block(MD5_CTX * ctx, uint8_t * data)
++{
++	uint32_t M[16];
++	uint32_t a = ctx->A;
++	uint32_t b = ctx->B;
++	uint32_t c = ctx->C;
++	uint32_t d = ctx->D;
++
++	create_M_blocks(M, data);
++
++	/* Round 1 */
++	FF(a, b, c, d, M[0], s11, 0xd76aa478);	/*  1 */
++	FF(d, a, b, c, M[1], s12, 0xe8c7b756);	/*  2 */
++	FF(c, d, a, b, M[2], s13, 0x242070db);	/*  3 */
++	FF(b, c, d, a, M[3], s14, 0xc1bdceee);	/*  4 */
++	FF(a, b, c, d, M[4], s11, 0xf57c0faf);	/*  5 */
++	FF(d, a, b, c, M[5], s12, 0x4787c62a);	/*  6 */
++	FF(c, d, a, b, M[6], s13, 0xa8304613);	/*  7 */
++	FF(b, c, d, a, M[7], s14, 0xfd469501);	/*  8 */
++	FF(a, b, c, d, M[8], s11, 0x698098d8);	/*  9 */
++	FF(d, a, b, c, M[9], s12, 0x8b44f7af);	/* 10 */
++	FF(c, d, a, b, M[10], s13, 0xffff5bb1);	/* 11 */
++	FF(b, c, d, a, M[11], s14, 0x895cd7be);	/* 12 */
++	FF(a, b, c, d, M[12], s11, 0x6b901122);	/* 13 */
++	FF(d, a, b, c, M[13], s12, 0xfd987193);	/* 14 */
++	FF(c, d, a, b, M[14], s13, 0xa679438e);	/* 15 */
++	FF(b, c, d, a, M[15], s14, 0x49b40821);	/* 16 */
++
++	/* Round 2 */
++	GG(a, b, c, d, M[1], s21, 0xf61e2562);	/* 17 */
++	GG(d, a, b, c, M[6], s22, 0xc040b340);	/* 18 */
++	GG(c, d, a, b, M[11], s23, 0x265e5a51);	/* 19 */
++	GG(b, c, d, a, M[0], s24, 0xe9b6c7aa);	/* 20 */
++	GG(a, b, c, d, M[5], s21, 0xd62f105d);	/* 21 */
++	GG(d, a, b, c, M[10], s22, 0x02441453);	/* 22 */
++	GG(c, d, a, b, M[15], s23, 0xd8a1e681);	/* 23 */
++	GG(b, c, d, a, M[4], s24, 0xe7d3fbc8);	/* 24 */
++	GG(a, b, c, d, M[9], s21, 0x21e1cde6);	/* 25 */
++	GG(d, a, b, c, M[14], s22, 0xc33707d6);	/* 26 */
++	GG(c, d, a, b, M[3], s23, 0xf4d50d87);	/* 27 */
++	GG(b, c, d, a, M[8], s24, 0x455a14ed);	/* 28 */
++	GG(a, b, c, d, M[13], s21, 0xa9e3e905);	/* 29 */
++	GG(d, a, b, c, M[2], s22, 0xfcefa3f8);	/* 30 */
++	GG(c, d, a, b, M[7], s23, 0x676f02d9);	/* 31 */
++	GG(b, c, d, a, M[12], s24, 0x8d2a4c8a);	/* 32 */
++
++	/* Round 3 */
++	HH(a, b, c, d, M[5], s31, 0xfffa3942);	/* 33 */
++	HH(d, a, b, c, M[8], s32, 0x8771f681);	/* 34 */
++	HH(c, d, a, b, M[11], s33, 0x6d9d6122);	/* 35 */
++	HH(b, c, d, a, M[14], s34, 0xfde5380c);	/* 36 */
++	HH(a, b, c, d, M[1], s31, 0xa4beea44);	/* 37 */
++	HH(d, a, b, c, M[4], s32, 0x4bdecfa9);	/* 38 */
++	HH(c, d, a, b, M[7], s33, 0xf6bb4b60);	/* 39 */
++	HH(b, c, d, a, M[10], s34, 0xbebfbc70);	/* 40 */
++	HH(a, b, c, d, M[13], s31, 0x289b7ec6);	/* 41 */
++	HH(d, a, b, c, M[0], s32, 0xeaa127fa);	/* 42 */
++	HH(c, d, a, b, M[3], s33, 0xd4ef3085);	/* 43 */
++	HH(b, c, d, a, M[6], s34, 0x4881d05);	/* 44 */
++	HH(a, b, c, d, M[9], s31, 0xd9d4d039);	/* 45 */
++	HH(d, a, b, c, M[12], s32, 0xe6db99e5);	/* 46 */
++	HH(c, d, a, b, M[15], s33, 0x1fa27cf8);	/* 47 */
++	HH(b, c, d, a, M[2], s34, 0xc4ac5665);	/* 48 */
++
++	/* Round 4 */
++	II(a, b, c, d, M[0], s41, 0xf4292244);	/* 49 */
++	II(d, a, b, c, M[7], s42, 0x432aff97);	/* 50 */
++	II(c, d, a, b, M[14], s43, 0xab9423a7);	/* 51 */
++	II(b, c, d, a, M[5], s44, 0xfc93a039);	/* 52 */
++	II(a, b, c, d, M[12], s41, 0x655b59c3);	/* 53 */
++	II(d, a, b, c, M[3], s42, 0x8f0ccc92);	/* 54 */
++	II(c, d, a, b, M[10], s43, 0xffeff47d);	/* 55 */
++	II(b, c, d, a, M[1], s44, 0x85845dd1);	/* 56 */
++	II(a, b, c, d, M[8], s41, 0x6fa87e4f);	/* 57 */
++	II(d, a, b, c, M[15], s42, 0xfe2ce6e0);	/* 58 */
++	II(c, d, a, b, M[6], s43, 0xa3014314);	/* 59 */
++	II(b, c, d, a, M[13], s44, 0x4e0811a1);	/* 60 */
++	II(a, b, c, d, M[4], s41, 0xf7537e82);	/* 61 */
++	II(d, a, b, c, M[11], s42, 0xbd3af235);	/* 62 */
++	II(c, d, a, b, M[2], s43, 0x2ad7d2bb);	/* 63 */
++	II(b, c, d, a, M[9], s44, 0xeb86d391);	/* 64 */
++
++	ctx->A += a;
++	ctx->B += b;
++	ctx->C += c;
++	ctx->D += d;
++}
++
++void create_M_blocks(uint32_t * M, uint8_t * data)
++{
++#ifdef HAVE_LITTLE_ENDIAN
++	memcpy((uint8_t *) M, data, 64);
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++#ifdef HAVE_BIG_ENDIAN
++	int i;
++	for (i = 0; i < 16; i++, data += 4) {
++		((uint8_t *) (&M[i]))[0] = data[3];
++		((uint8_t *) (&M[i]))[1] = data[2];
++		((uint8_t *) (&M[i]))[2] = data[1];
++		((uint8_t *) (&M[i]))[3] = data[0];
++	}
++#endif				/* HAVE_BIG_ENDIAN */
++}
++
++void md5_compute(MD5_CTX * ctx, uint8_t * data, uint32_t len)
++{
++	uint8_t pos = ((ctx->bitlen[0] >> 3) & 0x3f);
++
++	/* First we update the bit length */
++	if ((ctx->bitlen[0] += (len << 3)) < (len << 3))
++		ctx->bitlen[1]++;
++	ctx->bitlen[1] += (len >> 29);	/* len is expressed in bytes */
++
++	if (pos) {
++		/* Buffer is not empty */
++		if (64 - pos >= len) {
++			memcpy(ctx->buf_cur, data, len);
++			ctx->buf_cur += len;
++			pos += len;
++			if (pos == 64) {
++				/* The current block is over */
++				md5_over_block(ctx, ctx->buf);
++				ctx->buf_cur = ctx->buf;
++			}
++			return;
++		} else {
++			memcpy(ctx->buf_cur, data, 64 - pos);
++			md5_over_block(ctx, ctx->buf);
++			len -= (64 - pos);
++			data += (64 - pos);
++			ctx->buf_cur = ctx->buf;
++		}
++	}
++	while (len >= 64) {
++		md5_over_block(ctx, data);
++		len -= 64;
++		data += 64;
++	}
++	if (len) {
++		memcpy(ctx->buf_cur, data, len);
++		ctx->buf_cur += len;
++	}
++}
++
++void md5_final(MD5_CTX * ctx, uint8_t * digest)
++{
++	uint32_t rem_size;
++	uint8_t *buf_cur = ctx->buf_cur;
++	int i;
++
++	rem_size = 64 - ((ctx->bitlen[0] >> 3) & 0x3f);
++	*(buf_cur++) = 0x80;
++
++	if (rem_size > 8 + 1) {
++		/* We have enough room in the current block */
++		for (i = 0; i < rem_size - 8 - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++	} else {
++		/* We do not have enough room and need therefore to add a new
++		   64-byte block */
++		for (i = 0; i < rem_size - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++		md5_over_block(ctx, ctx->buf);
++
++		buf_cur = ctx->buf;
++		for (i = 0; i < 64 - 8; i++) {
++			*(buf_cur++) = 0;
++		}
++	}
++#ifdef HAVE_LITTLE_ENDIAN
++	memcpy(buf_cur, (uint8_t *) ctx->bitlen, 8);
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++#ifdef HAVE_BIG_ENDIAN
++	*(buf_cur++) = (ctx->bitlen[0] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 0) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 0) & 0xff;
++#endif				/* HAVE_BIG_ENDIAN */
++
++	md5_over_block(ctx, ctx->buf);
++
++#ifdef HAVE_LITTLE_ENDIAN
++	memcpy(digest + 0, (uint8_t *) (&(ctx->A)), sizeof(uint32_t));
++	memcpy(digest + 4, (uint8_t *) (&(ctx->B)), sizeof(uint32_t));
++	memcpy(digest + 8, (uint8_t *) (&(ctx->C)), sizeof(uint32_t));
++	memcpy(digest + 12, (uint8_t *) (&(ctx->D)), sizeof(uint32_t));
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++#ifdef HAVE_BIG_ENDIAN
++	digest[0] = ((ctx->A) >> 24) & 0xff;
++	digest[1] = ((ctx->A) >> 16) & 0xff;
++	digest[2] = ((ctx->A) >> 8) & 0xff;
++	digest[3] = ((ctx->A) >> 0) & 0xff;
++	digest[4] = ((ctx->B) >> 24) & 0xff;
++	digest[5] = ((ctx->B) >> 16) & 0xff;
++	digest[6] = ((ctx->B) >> 8) & 0xff;
++	digest[7] = ((ctx->B) >> 0) & 0xff;
++	digest[8] = ((ctx->C) >> 24) & 0xff;
++	digest[9] = ((ctx->C) >> 16) & 0xff;
++	digest[10] = ((ctx->C) >> 8) & 0xff;
++	digest[11] = ((ctx->C) >> 0) & 0xff;
++	digest[12] = ((ctx->D) >> 24) & 0xff;
++	digest[13] = ((ctx->D) >> 16) & 0xff;
++	digest[14] = ((ctx->D) >> 8) & 0xff;
++	digest[15] = ((ctx->D) >> 0) & 0xff;
++#endif				/* HAVE_BIG_ENDIAN */
++}
++
++void sha1_init(SHA1_CTX * ctx)
++{
++	ctx->A = 0x67452301;
++	ctx->B = 0xefcdab89;
++	ctx->C = 0x98badcfe;
++	ctx->D = 0x10325476;
++	ctx->E = 0xc3d2e1f0;
++	ctx->buf_cur = ctx->buf;
++	ctx->bitlen[0] = ctx->bitlen[1] = 0;
++	memset(ctx->buf, 0, 64);
++}
++
++void sha1_over_block(SHA1_CTX * ctx, uint8_t * data)
++{
++	int i;
++	uint32_t W[80];
++	uint32_t a = ctx->A;
++	uint32_t b = ctx->B;
++	uint32_t c = ctx->C;
++	uint32_t d = ctx->D;
++	uint32_t e = ctx->E;
++	uint32_t temp;
++
++	create_W_blocks(W, data);
++
++	/* Round 1 */
++	for (i = 0; i < 20; i++) {
++		temp = LROLL(a, 5) + f(b, c, d) + e + W[i] + K1;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	/* Round 2 */
++	for (i = 20; i < 40; i++) {
++		temp = LROLL(a, 5) + h(b, c, d) + e + W[i] + K2;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	/* Round 3 */
++	for (i = 40; i < 60; i++) {
++		temp = LROLL(a, 5) + g(b, c, d) + e + W[i] + K3;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	/* Round 4 */
++	for (i = 60; i < 80; i++) {
++		temp = LROLL(a, 5) + h(b, c, d) + e + W[i] + K4;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	ctx->A += a;
++	ctx->B += b;
++	ctx->C += c;
++	ctx->D += d;
++	ctx->E += e;
++}
++
++void create_W_blocks(uint32_t * W, uint8_t * data)
++{
++	int i;
++
++#ifdef HAVE_BIG_ENDIAN
++	memcpy((uint8_t *) W, data, 64);
++#endif				/* HAVE_BIG_ENDIAN */
++
++#ifdef HAVE_LITTLE_ENDIAN
++	for (i = 0; i < 16; i++, data += 4) {
++		((uint8_t *) (&W[i]))[0] = data[3];
++		((uint8_t *) (&W[i]))[1] = data[2];
++		((uint8_t *) (&W[i]))[2] = data[1];
++		((uint8_t *) (&W[i]))[3] = data[0];
++	}
++#endif				/* HAVE_LITTLE_ENDIAN */
++	for (i = 16; i < 80; i++) {
++		W[i] = W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16];
++		W[i] = LROLL(W[i], 1);
++	}
++}
++
++void sha1_compute(SHA1_CTX * ctx, uint8_t * data, uint32_t len)
++{
++	uint8_t pos = ((ctx->bitlen[0] >> 3) & 0x3f);
++
++	/* First we update the bit length */
++	if ((ctx->bitlen[0] += (len << 3)) < (len << 3))
++		ctx->bitlen[1]++;
++	ctx->bitlen[1] += (len >> 29);	/* len is expressed in bytes */
++
++	if (pos) {
++		/* Buffer is not empty */
++		if (64 - pos >= len) {
++			memcpy(ctx->buf_cur, data, len);
++			ctx->buf_cur += len;
++			pos += len;
++			if (pos == 64) {
++				/* The current block is over */
++				sha1_over_block(ctx, ctx->buf);
++				ctx->buf_cur = ctx->buf;
++			}
++			return;
++		} else {
++			memcpy(ctx->buf_cur, data, 64 - pos);
++			sha1_over_block(ctx, ctx->buf);
++			len -= (64 - pos);
++			data += (64 - pos);
++			ctx->buf_cur = ctx->buf;
++		}
++	}
++	while (len >= 64) {
++		sha1_over_block(ctx, data);
++		len -= 64;
++		data += 64;
++	}
++	if (len) {
++		memcpy(ctx->buf_cur, data, len);
++		ctx->buf_cur += len;
++	}
++}
++
++void sha1_final(SHA1_CTX * ctx, uint8_t * digest)
++{
++	uint32_t rem_size;
++	uint8_t *buf_cur = ctx->buf_cur;
++	int i;
++
++	rem_size = 64 - ((ctx->bitlen[0] >> 3) & 0x3f);
++	*(buf_cur++) = 0x80;
++
++	if (rem_size > 8 + 1) {
++		/* We have enough room in the current block */
++		for (i = 0; i < rem_size - 8 - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++	} else {
++		/* We do not have enough room and need therefore to add a new
++		   64-byte block */
++		for (i = 0; i < rem_size - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++		sha1_over_block(ctx, ctx->buf);
++
++		buf_cur = ctx->buf;
++		for (i = 0; i < 64 - 8; i++) {
++			*(buf_cur++) = 0;
++		}
++	}
++#ifdef HAVE_BIG_ENDIAN
++	memcpy(buf_cur, (uint8_t *) ctx->bitlen, 8);
++#endif				/* HAVE_BIG_ENDIAN */
++
++#ifdef HAVE_LITTLE_ENDIAN
++	*(buf_cur++) = (ctx->bitlen[1] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 0) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 0) & 0xff;
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++	sha1_over_block(ctx, ctx->buf);
++
++#ifdef HAVE_BIG_ENDIAN
++	memcpy(digest + 0, (uint8_t *) (&(ctx->A)), sizeof(uint32_t));
++	memcpy(digest + 4, (uint8_t *) (&(ctx->B)), sizeof(uint32_t));
++	memcpy(digest + 8, (uint8_t *) (&(ctx->C)), sizeof(uint32_t));
++	memcpy(digest + 12, (uint8_t *) (&(ctx->D)), sizeof(uint32_t));
++	memcpy(digest + 16, (uint8_t *) (&(ctx->E)), sizeof(uint32_t));
++#endif				/* HAVE_BIG_ENDIAN */
++
++#ifdef HAVE_LITTLE_ENDIAN
++	digest[0] = ((ctx->A) >> 24) & 0xff;
++	digest[1] = ((ctx->A) >> 16) & 0xff;
++	digest[2] = ((ctx->A) >> 8) & 0xff;
++	digest[3] = ((ctx->A) >> 0) & 0xff;
++	digest[4] = ((ctx->B) >> 24) & 0xff;
++	digest[5] = ((ctx->B) >> 16) & 0xff;
++	digest[6] = ((ctx->B) >> 8) & 0xff;
++	digest[7] = ((ctx->B) >> 0) & 0xff;
++	digest[8] = ((ctx->C) >> 24) & 0xff;
++	digest[9] = ((ctx->C) >> 16) & 0xff;
++	digest[10] = ((ctx->C) >> 8) & 0xff;
++	digest[11] = ((ctx->C) >> 0) & 0xff;
++	digest[12] = ((ctx->D) >> 24) & 0xff;
++	digest[13] = ((ctx->D) >> 16) & 0xff;
++	digest[14] = ((ctx->D) >> 8) & 0xff;
++	digest[15] = ((ctx->D) >> 0) & 0xff;
++	digest[16] = ((ctx->E) >> 24) & 0xff;
++	digest[17] = ((ctx->E) >> 16) & 0xff;
++	digest[18] = ((ctx->E) >> 8) & 0xff;
++	digest[19] = ((ctx->E) >> 0) & 0xff;
++#endif				/* HAVE_LITTLE_ENDIAN */
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/hmac.h linux-2.4.25/net/ipv6/mobile_ip6/hmac.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/hmac.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/hmac.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,94 @@
++/*
++ *      MIPL Mobile IPv6 Message authentication algorithms        
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HMAC_H
++#define _HMAC_H
++
++#include <linux/types.h>
++#include <linux/in6.h>
++
++#define HAVE_LITTLE_ENDIAN
++
++#define NO_EXPIRY 1  /* For sec_as */
++
++#define ALG_AUTH_NONE           0
++#define ALG_AUTH_HMAC_MD5       1
++#define ALG_AUTH_HMAC_SHA1      2
++
++struct sec_as;
++struct ah_processing {
++	void *context;
++	struct sec_as *sas;
++	u_int8_t *key_auth;
++	u_int32_t key_auth_len;
++};
++
++struct antireplay {
++	u_int32_t count;
++	u_int32_t bitmap; 
++};
++
++typedef struct {
++  u_int32_t A, B, C, D;
++  u_int32_t bitlen[2];
++  u_int8_t* buf_cur;
++  u_int8_t buf[64];
++} MD5_CTX;
++
++typedef struct {
++  u_int32_t A, B, C, D, E;
++  u_int32_t bitlen[2];
++  u_int8_t* buf_cur;
++  u_int8_t buf[64];
++} SHA1_CTX;
++
++
++
++int ah_hmac_md5_init (struct ah_processing *ahp, u_int8_t *key, u_int32_t key_len);
++void ah_hmac_md5_loop(struct ah_processing*, void*, u_int32_t);
++void ah_hmac_md5_result(struct ah_processing*, char*);
++int ah_hmac_sha1_init(struct ah_processing*, u_int8_t *key, u_int32_t key_len);
++void ah_hmac_sha1_loop(struct ah_processing*, void*, u_int32_t);
++void ah_hmac_sha1_result(struct ah_processing*, char*);
++
++
++#define AH_HDR_LEN 12   /* # of bytes for Next Header, Payload Length,
++                           RESERVED, Security Parameters Index and
++
++                           Sequence Number Field */
++
++void md5_init(MD5_CTX *ctx);
++void md5_over_block(MD5_CTX *ctx, u_int8_t* data);
++void create_M_blocks(u_int32_t* M, u_int8_t* data);
++void md5_compute(MD5_CTX *ctx, u_int8_t* data, u_int32_t len);
++void md5_final(MD5_CTX *ctx, u_int8_t* digest);
++
++void sha1_init(SHA1_CTX *ctx);
++void sha1_over_block(SHA1_CTX *ctx, u_int8_t* data);
++void create_W_blocks(u_int32_t* W, u_int8_t* data);
++void sha1_compute(SHA1_CTX *ctx, u_int8_t* data, u_int32_t len);
++void sha1_final(SHA1_CTX *ctx, u_int8_t* digest);
++
++struct mipv6_acq {
++	struct in6_addr coa;
++	struct in6_addr haddr;
++	struct in6_addr peer;
++	u_int32_t spi;
++};
++#define MIPV6_MAX_AUTH_DATA 20
++
++#define HMAC_MD5_HASH_LEN   16
++#define HMAC_SHA1_HASH_LEN  20
++#define HMAC_SHA1_KEY_SIZE  20
++#define HMAC_MD5_ICV_LEN   12 /* RFC 2403 */
++#define HMAC_SHA1_ICV_LEN  12 /* RFC 2404 */
++
++#endif /* _HMAC_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/ioctl_mn.c linux-2.4.25/net/ipv6/mobile_ip6/ioctl_mn.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/ioctl_mn.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/ioctl_mn.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,142 @@
++/*
++ *	Mobile Node IOCTL Control device
++ *
++ *	Authors:
++ *	Henrik Petander		<lpetande@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/fs.h>
++#include <linux/poll.h>
++#include <linux/ioctl.h> 
++#include <net/ipv6.h>
++#include <asm/uaccess.h>
++
++#include "debug.h"
++#include "mdetect.h"
++#include "multiaccess_ctl.h"
++
++/* Reserved for local / experimental use */
++#define MAJOR_NUM 0xf9
++
++/* Get Care-of address information for Mobile Node */
++#define IOCTL_GET_CAREOFADDR _IOWR(MAJOR_NUM, 9, void *)
++
++#define MA_IOCTL_SET_IFACE_PREFERENCE _IOR (MAJOR_NUM, 13, void *)
++
++/* The name of the device file */
++#define CTLFILE "mipv6_dev"
++
++static int inuse = 0;
++
++static int mipv6_open(struct inode *inode, struct file *file)
++{
++	DEBUG(DBG_INFO, "(%p)\n", file);
++
++	if (inuse)
++		return -EBUSY;
++
++	inuse++;
++
++	MOD_INC_USE_COUNT;
++
++	return 0;
++}
++
++static int mipv6_close(struct inode *inode, struct file *file)
++{
++	DEBUG(DBG_INFO, "(%p,%p)\n", inode, file);
++	inuse--;
++
++	MOD_DEC_USE_COUNT;
++
++	return 0;
++}
++
++int mipv6_ioctl(struct inode *inode, struct file *file, 
++		unsigned int ioctl_num,	/* The number of the ioctl */
++		unsigned long arg)	/* The parameter to it */
++{
++	struct in6_addr careofaddr;
++
++	/* Switch according to the ioctl called */
++	switch (ioctl_num) {
++	case IOCTL_GET_CAREOFADDR:
++		DEBUG(DBG_DATADUMP, "IOCTL_GET_CAREOFADDR");
++		/* First get home address from user and then look up 
++		 * the care-of address and return it
++		 */
++		if (copy_from_user(&careofaddr, (struct in6_addr *)arg, 
++				   sizeof(struct in6_addr)) < 0) {
++			DEBUG(DBG_WARNING, "Copy from user failed");
++			return -EFAULT;
++		}
++		mipv6_get_care_of_address(&careofaddr, &careofaddr);
++		if (copy_to_user((struct in6_addr *)arg, &careofaddr,
++				 sizeof(struct in6_addr)) < 0) {
++			DEBUG(DBG_WARNING, "copy_to_user failed");
++			return -EFAULT;
++		}
++		break;
++	case MA_IOCTL_SET_IFACE_PREFERENCE:
++		DEBUG(DBG_INFO, "MA_IOCTL_SET_IFACE_PREFERENCE");
++		ma_ctl_set_preference(arg);
++		break;
++
++	default:
++		DEBUG(DBG_WARNING, "Unknown ioctl cmd (%d)", ioctl_num);
++		return -ENOENT;
++	}
++	return 0;
++}
++
++struct file_operations Fops = {
++	owner: THIS_MODULE,
++	read: NULL,
++	write: NULL,
++	poll: NULL,
++	ioctl: mipv6_ioctl,
++	open: mipv6_open,
++	release: mipv6_close
++};
++
++
++/* Initialize the module - Register the character device */
++int mipv6_ioctl_mn_init(void)
++{
++	int ret_val;
++
++	/* Register the character device (atleast try) */
++	ret_val = register_chrdev(MAJOR_NUM, CTLFILE, &Fops);
++
++	/* Negative values signify an error */
++	if (ret_val < 0) {
++		DEBUG(DBG_ERROR, "failed registering char device (err=%d)",
++		      ret_val);
++		return ret_val;
++	}
++
++	DEBUG(DBG_INFO, "Device number %x, success", MAJOR_NUM);
++	return 0;
++}
++
++
++/* Cleanup - unregister the appropriate file from /proc */
++void mipv6_ioctl_mn_exit(void)
++{
++	int ret;
++	/* Unregister the device */
++	ret = unregister_chrdev(MAJOR_NUM, CTLFILE);
++
++	/* If there's an error, report it */
++	if (ret < 0)
++		DEBUG(DBG_ERROR, "errorcode: %d\n", ret);
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mdetect.c linux-2.4.25/net/ipv6/mobile_ip6/mdetect.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mdetect.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mdetect.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,1153 @@
++/*
++ *      Movement Detection Module
++ *
++ *      Authors:
++ *      Henrik Petander                <lpetande@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ *      Handles the L3 movement detection of mobile node and also
++ *      changing of its routes.
++ *  
++ */
++
++/*
++ *	Changes:
++ *
++ *	Nanno Langstraat	:	Locking fixes
++ *      Venkata Jagana          :       Locking fix
++ */
++
++#include <linux/autoconf.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/if_arp.h>
++#include <linux/route.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipglue.h>
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include "util.h"
++#include "mdetect.h"
++#include "mn.h"
++#include "debug.h"
++#include "multiaccess_ctl.h"
++
++#define START 0
++#define CONTINUE 1
++#define OK 2
++#define DEBUG_MDETECT 7
++
++#define DEF_RTR_POLL_IVAL 5 /* In seconds */
++
++#define NO_RTR 0
++#define RTR_SUSPECT 1
++#define CURR_RTR_OK 2
++
++#define RA_RCVD 0
++#define NA_RCVD 1
++#define TIMEOUT 2
++
++#define MIPV6_MDF_NONE 0x0
++#define MIPV6_MDF_HAS_RTR_PREV 0x1
++
++#define ROUTER_REACHABLE 1
++#define RADV_MISSED 2
++#define NOT_REACHABLE 3
++
++/* R_TIME_OUT paramater is used to make the decision when to change the 
++ * default  router, if the current one is unreachable. 2s is pretty aggressive 
++ * and may result in hopping between two routers. OTOH a small value enhances 
++ * the  performance
++ */
++#define R_TIME_OUT 30*HZ
++
++/* maximum RA interval for router unreachability detection */
++#define MAX_RADV_INTERVAL 6*HZ  /* 6000 ms... */
++
++/* Threshold for exponential resending of router solicitations */
++#define RS_RESEND_LINEAR 10*HZ
++
++#define EAGER_CELL_SWITCHING 1
++#define LAZY_CELL_SWITCHING 0
++#define RESPECT_DAD 1
++
++#define ROUTER_ADDRESS 0x20
++
++/* RA flags */
++#define ND_RA_FLAG_MANAGED  0x80
++#define ND_RA_FLAG_OTHER    0x40
++#define ND_RA_FLAG_HA       0x20
++
++/* DAD flags for global and link local addresses */
++
++#define COA_TENTATIVE       0x10
++#define LLADDR_TENTATIVE    0x01
++
++struct router {
++	struct list_head list;
++	struct in6_addr ll_addr;
++	struct in6_addr raddr; /* Also contains prefix */
++	__u8 link_addr[MAX_ADDR_LEN]; /* link layer address */
++	__u8 link_addr_len;
++	__u8 state;
++	__u8 is_current;
++	__u8 reachable;
++	int ifindex;
++	int pfix_len; /* Length of the network prefix */
++	unsigned long lifetime; /* from ra */
++	__u32 last_ns_sent; 
++	__u32 last_ra_rcvd;
++	__u32 interval; /* ra interval in milliseconds, 0 if not set */ 
++	int glob_addr; /*Whether raddr contains also routers global address*/
++	__u8 flags; /* RA flags, for example ha */
++        struct in6_addr CoA;     /* care-off address used with this router */
++	int extra_addr_route;
++};
++
++/* dad could also be RESPECT_DAD for duplicate address detection of
++   new care-of addresses */
++static int dad = 0;
++
++/* Only one choice, nothing else implemented */
++int max_rtr_reach_time = DEF_RTR_POLL_IVAL;
++
++
++int eager_cell_switching = EAGER_CELL_SWITCHING; /* Can be set to 0 via proc */  
++static spinlock_t router_lock; 
++static spinlock_t ho_lock;
++
++static void coa_timer_handler(unsigned long arg);
++static void timer_handler(unsigned long foo);
++static struct router *curr_router = NULL, *next_router = NULL;
++static struct timer_list r_timer = { function: timer_handler };
++static struct timer_list coa_timer = { function: coa_timer_handler };
++#define MAX_ROUTERS 1000
++static LIST_HEAD(rtr_list);
++static int num_routers = 0;
++static struct handoff *_ho = NULL;
++/*
++ * Functions for handling the default router list, which movement
++ * detection uses for avoiding loops etc.
++ */
++
++/* TODO: Send NS to router after MAX interval has passed from last RA */
++static int mipv6_router_state(struct router *rtr) {
++	if (rtr->interval) {
++		if (time_before(jiffies, (rtr->last_ra_rcvd + (rtr->interval * HZ) / 1000)))
++			return ROUTER_REACHABLE;
++		else
++			return NOT_REACHABLE;
++	}
++	else
++		if (time_after(jiffies, rtr->last_ra_rcvd + (rtr->lifetime * HZ)))
++			return NOT_REACHABLE;
++	return ROUTER_REACHABLE;
++}
++
++/* searches for a specific router or any router that is reachable, 
++ * if address is NULL. Also deletes obsolete routers.
++ */
++static void mipv6_router_gc(void)
++{
++	struct router *curr = NULL;
++	struct list_head *lh, *lh_tmp;
++
++	DEBUG_FUNC();
++
++	list_for_each_safe(lh, lh_tmp, &rtr_list) {
++		curr =  list_entry(lh, struct router, list);
++		if (mipv6_router_state(curr) == NOT_REACHABLE && !curr->is_current) {
++			num_routers--;
++			list_del_init(&curr->list);
++			DEBUG(DBG_DATADUMP, "Deleting unreachable router  %x:%x:%x:%x:%x:%x:%x:%x", 
++			      NIPV6ADDR(&curr->raddr));
++			kfree(curr);
++		}
++		else {
++			DEBUG(DBG_DATADUMP, "NOT Deleting router  %x:%x:%x:%x:%x:%x:%x:%x", 
++			      NIPV6ADDR(&curr->raddr));
++		}
++	}
++}
++
++static struct router *mipv6_rtr_get(struct in6_addr *search_addr)
++{
++	struct router *rtr = NULL;
++	struct list_head *lh;
++
++	DEBUG_FUNC();
++
++	if (search_addr == NULL)
++		return NULL;
++	list_for_each(lh, &rtr_list) {
++		rtr = list_entry(lh, struct router, list);
++		if(!ipv6_addr_cmp(search_addr, &rtr->raddr)) {
++			return rtr;
++		}
++	}
++	return NULL;
++}
++
++/*
++ * Adds router to list
++ */
++static struct router *mipv6_rtr_add(struct router *nrt)
++{
++
++	struct router *rptr;
++
++	DEBUG_FUNC();
++
++	/* check if someone is trying DoS attack, or we just have some
++           memory leaks... */
++	if (num_routers > MAX_ROUTERS) {
++		DEBUG(DBG_CRITICAL, 
++		      "failed to add new router, MAX_ROUTERS exceeded");
++		return NULL;
++	}
++	
++	rptr = kmalloc(sizeof(struct router), GFP_ATOMIC);
++	if (rptr) {
++		memcpy(rptr, nrt, sizeof(struct router));
++		list_add(&rptr->list, &rtr_list);
++		num_routers++;
++	}
++	DEBUG(DBG_INFO, "Adding router: %x:%x:%x:%x:%x:%x:%x:%x, "
++	      "lifetime : %d sec, adv.interval: %d millisec", 
++	      NIPV6ADDR(&rptr->raddr), rptr->lifetime, rptr->interval);
++
++	DEBUG(DBG_INFO, "num_routers after addition: %d", num_routers);
++	return rptr;
++}
++
++/* Cleans up the list */
++static void list_free(struct router **curr_router_p)
++{
++	struct router *tmp;
++	struct list_head *lh, *lh_tmp;
++
++	DEBUG_FUNC();
++
++	DEBUG(DBG_INFO, "Freeing the router list");
++	/* set curr_router->prev_router and curr_router NULL */
++	*curr_router_p = NULL;
++	list_for_each_safe(lh, lh_tmp, &rtr_list) {
++		tmp = list_entry(lh, struct router, list);
++		DEBUG(DBG_INFO, "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&tmp->ll_addr));
++		list_del(&tmp->list);
++		kfree(tmp);
++		num_routers--;
++	}
++}
++
++int rs_state = START;
++
++/* Sends router solicitations to all valid devices 
++ * source  = link local address (of sending interface)
++ * dstaddr = all routers multicast address
++ * Solicitations are sent at an exponentially decreasing rate
++ *
++ * TODO: send solicitation first at a normal rate (from ipv6) and
++ *       after that use the exponentially increasing intervals 
++ */
++static int rs_send(void)
++{
++	struct net_device *dev;
++	struct in6_addr raddr, lladdr;
++	struct inet6_dev *in6_dev = NULL;
++	static int num_rs;
++
++	if (rs_state == START) {
++		num_rs = 0;
++		rs_state = CONTINUE;
++	} else if (num_rs++ > MAX_RTR_SOLICITATIONS)
++		return HZ;
++
++	ipv6_addr_all_routers(&raddr);
++	read_lock(&dev_base_lock); 
++
++	/*  Send router solicitations to all interfaces  */
++	for (dev = dev_base; dev; dev = dev->next) {
++		if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ETHER) {
++			DEBUG(DBG_DATADUMP, "Sending RS to device %s", 
++			      dev->name);
++			if (!ipv6_get_lladdr(dev, &lladdr)) {
++				ndisc_send_rs(dev, &lladdr, &raddr);
++				in6_dev = in6_dev_get(dev);
++				in6_dev->if_flags |= IF_RS_SENT;
++				in6_dev_put(in6_dev);
++			} else {
++				DEBUG(DBG_DATADUMP, "%s: device doesn't have link-local address!\n", dev->name);
++				continue;
++			}
++		}
++		
++	}
++	read_unlock(&dev_base_lock);
++	return RTR_SOLICITATION_INTERVAL;
++}
++
++/* Create a new CoA for MN and also add a route to it if it is still tentative 
++   to allow MN to get packets to the address immediately
++ */
++static int form_coa(struct in6_addr *coa, struct in6_addr *pfix, 
++		    int plen, int ifindex)
++{
++	struct net_device *dev;
++	struct inet6_dev *in6_dev;
++	int ret = 0;
++
++	if ((dev = dev_get_by_index(ifindex)) == NULL) {
++		DEBUG(DBG_WARNING, "Device is not present");
++		return -1;
++	}
++	if ((in6_dev = in6_dev_get(dev)) == NULL) {
++		DEBUG(DBG_WARNING, "inet6_dev is not present");
++		dev_put(dev);
++		return -1;
++	}
++	coa->s6_addr32[0] = pfix->s6_addr32[0];
++	coa->s6_addr32[1] = pfix->s6_addr32[1];
++
++	if (ipv6_generate_eui64(coa->s6_addr + 8, dev) &&
++	    ipv6_inherit_eui64(coa->s6_addr + 8, in6_dev)) {
++		in6_dev_put(in6_dev);
++		dev_put(dev);
++		return -1;
++	}
++	if (ipv6_chk_addr(coa, dev) == 0) { 
++		DEBUG(DBG_WARNING, "care-of address still tentative");
++		ret = 1;
++	}
++	DEBUG(DBG_INFO, "Formed new CoA:  %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(coa));
++	
++	in6_dev_put(in6_dev);
++	dev_put(dev);
++	return ret;
++}
++
++static inline int rtr_is_gw(struct router *rtr, struct rt6_info *rt) 
++{
++	return ((rt->rt6i_flags & RTF_GATEWAY) && 
++		!ipv6_addr_cmp(&rt->rt6i_gateway, &rtr->ll_addr));
++}
++
++static inline int is_prefix_route(struct router *rtr, struct rt6_info *rt) 
++{
++	return (!(rt->rt6i_flags & RTF_GATEWAY) &&
++		mipv6_prefix_compare(&rt->rt6i_dst.addr, &rtr->raddr, 
++				     rtr->pfix_len));
++}
++
++/*
++ * Function that determines whether given rt6_info should be destroyed
++ * (negative => destroy rt6_info, zero or positive => do nothing) 
++ */
++static int mn_route_cleaner(struct rt6_info *rt, void *arg)
++{
++	int type;
++
++	struct router *rtr = (struct router *)arg;
++
++	int ret = -1;
++
++	DEBUG_FUNC();
++	
++	if (!rt || !rtr) {
++		DEBUG(DBG_ERROR, "mn_route_cleaner: rt or rtr NULL");
++		return 0;
++	}
++
++	/* Do not delete routes to local addresses or to multicast
++	 * addresses, since we need them to get router advertisements
++	 * etc. Multicast addresses are more tricky, but we don't
++	 * delete them in any case. The routing mechanism is not optimal for 
++	 * multihoming.   
++	 *
++	 * Also keep all new prefix routes, gateway routes through rtr and
++	 * all remaining default routes (including those used for reverse
++	 * tunneling)
++	 */
++	type = ipv6_addr_type(&rt->rt6i_dst.addr);
++	
++	if ((type & (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL)) ||
++	    rt->rt6i_dev == &loopback_dev || rtr_is_gw(rtr, rt) ||
++	    is_prefix_route(rtr, rt) || (rt->rt6i_flags & RTF_DEFAULT))  
++		ret = 0;
++	
++	/*   delete all others */
++
++	if (rt->rt6i_dev != &loopback_dev) {
++		DEBUG(DEBUG_MDETECT, 
++		      "%s route:\n"
++		      "dev: %s,\n"
++		      "gw: %x:%x:%x:%x:%x:%x:%x:%x,\n"
++		      "flags: %x,\n"
++		      "metric: %d,\n"
++		      "src: %x:%x:%x:%x:%x:%x:%x:%x,\n"
++		      "dst: %x:%x:%x:%x:%x:%x:%x:%x,\n"
++		      "plen: %d\n",
++		      (ret ? "Deleting" : "Keeping"),
++		      rt->rt6i_dev->name,	       
++		      NIPV6ADDR(&rt->rt6i_gateway),	       
++		      rt->rt6i_flags,
++		      rt->rt6i_metric,
++		      NIPV6ADDR(&rt->rt6i_src.addr),
++		      NIPV6ADDR(&rt->rt6i_dst.addr),
++		      rt->rt6i_dst.plen);
++	}
++	return ret;
++}
++
++/* 
++ * Deletes old routes 
++ */
++static __inline__ void delete_routes(struct router *rtr)
++{
++	DEBUG_FUNC();
++
++	/* Routing table is locked to ensure that nobody uses its */  
++	write_lock_bh(&rt6_lock);
++	DEBUG(DBG_INFO, "mipv6: Purging routes");
++	/*  TODO: Does not prune, should it?  */
++	fib6_clean_tree(&ip6_routing_table, 
++			mn_route_cleaner, 0, rtr);
++	write_unlock_bh(&rt6_lock);
++
++}
++
++
++static __inline__ void delete_coas(struct router *rtr)
++{
++	struct net_device *dev;
++	struct inet6_dev *idev;
++	struct inet6_ifaddr *ifa;
++
++	dev = dev_get_by_index(rtr->ifindex);
++	if (!dev)
++		return;
++
++	idev = in6_dev_get(dev);
++	
++	if (idev) {
++		read_lock_bh(&idev->lock);
++		ifa = idev->addr_list;
++		while (ifa) {
++			int keep; 
++			spin_lock(&ifa->lock);
++			
++			keep = (ifa->flags&(IFA_F_PERMANENT|IFA_F_HOMEADDR) ||
++				!ipv6_addr_cmp(&ifa->addr, &rtr->CoA));
++			
++			spin_unlock(&ifa->lock);
++			
++			if (keep)
++				ifa = ifa->if_next;
++			else {
++				in6_ifa_hold(ifa);
++				read_unlock_bh(&idev->lock);
++				
++				ipv6_del_addr(ifa);
++				
++				read_lock_bh(&idev->lock);
++				ifa = idev->addr_list;
++			}
++		}
++		read_unlock_bh(&idev->lock);
++		in6_dev_put(idev);
++	}
++	dev_put(dev);
++}
++
++int next_mdet_state[3][3] = {{CURR_RTR_OK, NO_RTR, NO_RTR},
++			     {CURR_RTR_OK, CURR_RTR_OK, NO_RTR},
++			     {CURR_RTR_OK, CURR_RTR_OK, RTR_SUSPECT}};
++ 
++char *states[3] = {"NO_RTR", "RTR_SUSPECT", "CURR_RTR_OK"};
++char *events[3] = {"RA_RCVD", "NA_RCVD", "TIMEOUT"};
++
++/* State transitions
++ * NO_RTR, RA_RCVD -> CURR_RTR_OK
++ * NO_RTR, NA_RCVD -> NO_RTR
++ * NO_RTR, TIMEOUT -> NO_RTR
++
++ * RTR_SUSPECT, RA_RCVD -> CURR_RTR_OK
++ * RTR_SUSPECT, NA_RCVD -> CURR_RTR_OK
++ * RTR_SUSPECT, TIMEOUT -> NO_RTR
++
++ * CURR_RTR_OK, RA_RCVD -> CURR_RTR_OK
++ * CURR_RTR_OK, NA_RCVD -> CURR_RTR_OK
++ * CURR_RTR_OK, TIMEOUT -> RTR_SUSPECT
++ */
++static int _curr_state = NO_RTR;
++
++#if 0
++static int get_mdet_state(void){
++	int state;
++	spin_lock_bh(&router_lock); 
++	state = _curr_state;
++	spin_unlock_bh(&router_lock);
++	return state;
++}
++#endif
++
++/* Needs to be called with router_lock locked */
++static int mdet_statemachine(int event)
++{
++	
++	if (event > 2 || _curr_state > 2) {
++	       DEBUG(DBG_ERROR, "Got illegal event or curr_state");
++	       return -1;
++	}
++
++	DEBUG(DBG_DATADUMP, "Got event %s and curr_state is %s", 
++	      events[event], states[_curr_state]); 
++	
++	_curr_state = next_mdet_state[_curr_state][event];
++	DEBUG(DBG_DATADUMP, "Next state is %s", states[_curr_state]);
++	return _curr_state;
++}
++
++static void mipv6_do_ll_dad(int ifindex)
++{
++	struct net_device *dev = dev_get_by_index(ifindex);
++	if (dev) {
++		struct in6_addr lladdr;
++		struct inet6_ifaddr *ifa;
++		if (!ipv6_get_lladdr(dev, &lladdr) &&
++		    (ifa = ipv6_get_ifaddr(&lladdr, dev)) != NULL) {
++			spin_lock_bh(&ifa->lock);
++			if (!(ifa->flags & IFA_F_TENTATIVE)) {
++				ifa->flags |= IFA_F_TENTATIVE;
++				spin_unlock_bh(&ifa->lock);
++				addrconf_dad_start(ifa, 0);
++			} else
++				spin_unlock_bh(&ifa->lock);
++
++		}
++		dev_put(dev);
++	}
++}
++/* 
++ * Changes the router, called from ndisc.c if mipv6_router_event 
++ * returns true.
++ */
++
++static void mipv6_change_router(void)
++{
++	struct in6_addr coa;
++	int ret, ifindex;
++	
++	DEBUG_FUNC(); 
++
++	
++	if (next_router == NULL) 
++		return;
++	
++	spin_lock(&router_lock);
++
++
++	if (curr_router != NULL && 
++	    !ipv6_addr_cmp(&curr_router->ll_addr, &next_router->ll_addr)) {
++		DEBUG(DBG_INFO,"Trying to handoff from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&curr_router->ll_addr));
++		DEBUG(DBG_INFO,"Trying to handoff to: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&next_router->ll_addr));
++		next_router = NULL; /* Let's not leave dangling pointers */
++		spin_unlock(&router_lock);
++		return;
++        }
++	ret = form_coa(&next_router->CoA, &next_router->raddr, 
++		       next_router->pfix_len, next_router->ifindex);
++	if (ret < 0) {
++		DEBUG(DBG_ERROR, "handoff: Creation of coa failed");
++		spin_unlock(&router_lock);
++		return;
++	} else if (ret > 0)
++		next_router->flags |= COA_TENTATIVE;
++
++	mdet_statemachine(RA_RCVD); /* TODO: What if DAD fails... */
++	if (next_router->interval)
++		mod_timer(&r_timer, jiffies + 
++			  (next_router->interval * HZ)/1000);
++	else
++		mod_timer(&r_timer, jiffies + max_rtr_reach_time * HZ);
++	
++
++	if (ret == 0) {
++		ipv6_addr_copy(&coa, &next_router->CoA);
++		ifindex = next_router->ifindex;
++		spin_unlock(&router_lock);
++		mipv6_mdet_finalize_ho(&coa, ifindex);
++		return;
++	}
++	spin_unlock(&router_lock);
++
++}
++static unsigned long ns_send(void)
++{
++	struct neighbour *neigh;
++	struct net_device *dev;
++	struct in6_addr *raddr;
++
++	DEBUG(DBG_DATADUMP, "Sending Neighbour solicitation to default router to verify its reachability");
++	if (!curr_router) 
++		return HZ;
++	if ((dev = dev_get_by_index(curr_router->ifindex)) == NULL)
++		return HZ;
++	if ((neigh = ndisc_get_neigh(dev, &curr_router->ll_addr)) == NULL) {
++		dev_put(dev);
++		return HZ;
++	}
++	if (curr_router->glob_addr)
++		raddr = &curr_router->raddr;
++	else 
++		raddr = &curr_router->ll_addr;
++
++	curr_router->last_ns_sent = jiffies;
++	ndisc_send_ns(dev, neigh, raddr, raddr, NULL);	
++
++	neigh_release(neigh);
++	dev_put(dev);
++	return HZ/5; /* Wait 200ms for a reply */
++}
++
++static int na_rcvd(void)
++{	
++	int neigh_ok = 0;
++	struct neighbour *neigh;
++	struct net_device *dev;
++
++	if (!curr_router) 
++		return 0;
++	if ((dev = dev_get_by_index(curr_router->ifindex)) == NULL)
++		return 0;
++	if ((neigh = ndisc_get_neigh(dev, &curr_router->ll_addr)) == NULL) {
++		dev_put(dev);
++		return 0;
++	}
++	if (neigh->flags & NTF_ROUTER && 
++	    (time_after(neigh->confirmed, curr_router->last_ns_sent) || 
++	     neigh->confirmed == curr_router->last_ns_sent)) {
++		neigh_ok = 1;
++		DEBUG(DBG_DATADUMP, "Mdetect event: NA rcvd from curr rtr");
++	} else
++		DEBUG(DBG_DATADUMP, "Mdetect event: NA NOT rcvd from curr rtr within time limit");
++	neigh_release(neigh);
++	dev_put(dev);
++	return neigh_ok;
++}
++
++static void coa_timer_handler(unsigned long dummy)
++{
++
++	spin_lock_bh(&ho_lock);
++	if (_ho) {
++		DEBUG(DBG_INFO, "Starting handoff after DAD");
++		mipv6_mobile_node_moved(_ho);
++		kfree(_ho);
++		_ho = NULL;
++	}
++	spin_unlock_bh(&ho_lock);
++}
++static void timer_handler(unsigned long foo)
++{
++	unsigned long timeout;
++	int state;
++	spin_lock_bh(&router_lock);
++	
++	if (_curr_state != NO_RTR)
++		rs_state = START;
++
++	if (_curr_state == RTR_SUSPECT && na_rcvd()) {
++		state = mdet_statemachine(NA_RCVD);
++		timeout = curr_router->interval ? curr_router->interval : max_rtr_reach_time * HZ;
++	} else { 
++		state =  mdet_statemachine(TIMEOUT);
++		if (state == NO_RTR)
++			timeout = rs_send();
++		else  /* RTR_SUSPECT */
++			timeout = ns_send();
++	}
++	if (!timeout)
++		timeout = HZ;
++
++	mipv6_router_gc();
++	mod_timer(&r_timer, jiffies + timeout);
++	spin_unlock_bh(&router_lock);
++}
++
++/**
++ * mipv6_get_care_of_address - get node's care-of primary address
++ * @homeaddr: one of node's home addresses
++ * @coaddr: buffer to store care-of address
++ *
++ * Stores the current care-of address in the @coaddr, assumes
++ * addresses in EUI-64 format.  Since node might have several home
++ * addresses caller MUST supply @homeaddr.  If node is at home
++ * @homeaddr is stored in @coaddr.  Returns 0 on success, otherwise a
++ * negative value.
++ **/
++int mipv6_get_care_of_address(
++	struct in6_addr *homeaddr, struct in6_addr *coaddr)
++{
++	
++	DEBUG_FUNC();
++
++	if (homeaddr == NULL)
++		return -1;
++	spin_lock_bh(&router_lock);
++	if (curr_router == NULL || mipv6_mn_is_at_home(homeaddr) || 
++	    mipv6_prefix_compare(homeaddr, &curr_router->raddr, 64) || 
++	    curr_router->flags&COA_TENTATIVE) {
++		DEBUG(DBG_INFO,
++		      "mipv6_get_care_of_address: returning home address");
++		ipv6_addr_copy(coaddr, homeaddr);
++		spin_unlock_bh(&router_lock);
++		return 0;
++
++	}
++
++	/* At home or address check failure probably due to dad wait */
++	if (mipv6_prefix_compare(&curr_router->raddr, homeaddr, 
++				 curr_router->pfix_len) 
++				 || (dad == RESPECT_DAD && 
++				     (ipv6_chk_addr(coaddr, NULL) == 0))) { 
++		ipv6_addr_copy(coaddr, homeaddr);
++	} else { 
++		ipv6_addr_copy(coaddr, &curr_router->CoA);
++	}
++
++	spin_unlock_bh(&router_lock);
++	return 0;
++}
++
++int mipv6_mdet_del_if(int ifindex)
++{
++	struct router *curr = NULL;
++	struct list_head *lh, *lh_tmp;
++
++	spin_lock_bh(&router_lock);
++	list_for_each_safe(lh, lh_tmp, &rtr_list) {
++		curr =  list_entry(lh, struct router, list);
++		if (curr->ifindex == ifindex) {
++			num_routers--;
++			list_del_init(&curr->list);
++			DEBUG(DBG_DATADUMP, "Deleting router  %x:%x:%x:%x:%x:%x:%x:%x on interface %d", 
++			      NIPV6ADDR(&curr->raddr), ifindex);
++			if (curr_router == curr)
++				curr_router = NULL;
++			kfree(curr);
++		}
++	}
++	spin_unlock_bh(&router_lock);
++	return 0;
++}
++
++void mipv6_mdet_retrigger_ho(void)
++{
++	struct handoff ho;
++
++	spin_lock_bh(&router_lock);
++	if (curr_router != NULL) {
++		ho.coa = &curr_router->CoA;
++		ho.plen = curr_router->pfix_len;
++		ho.ifindex = curr_router->ifindex;
++		ipv6_addr_copy(&ho.rtr_addr, &curr_router->raddr);
++		ho.home_address = (curr_router->glob_addr && 
++				   curr_router->flags&ND_RA_FLAG_HA);
++	}
++	spin_unlock_bh(&router_lock);
++	mipv6_mobile_node_moved(&ho);
++}
++
++void mipv6_mdet_set_curr_rtr_reachable(int reachable)
++{
++	spin_lock_bh(&router_lock);
++	if (curr_router != NULL) {
++		curr_router->reachable = reachable;
++	}
++	spin_unlock_bh(&router_lock);
++
++}
++
++int mipv6_mdet_finalize_ho(const struct in6_addr *coa, const int ifindex)
++{
++	int dummy;
++	struct handoff ho;
++	struct router *tmp;
++	struct net_device *dev; 
++	struct in6_addr ll_addr;
++
++	spin_lock_bh(&router_lock);
++
++	if (!next_router) {
++		spin_unlock_bh(&router_lock);
++		return 0;
++	}
++
++	dev = dev_get_by_index(next_router->ifindex);
++
++	if (ipv6_get_lladdr(dev, &ll_addr) == 0) {
++		if (ipv6_addr_cmp(&ll_addr, coa) == 0)
++			DEBUG(DBG_INFO, "DAD for link local address completed");
++		next_router->flags &= ~LLADDR_TENTATIVE;
++	}
++
++	dev_put(dev);
++
++	if (mipv6_prefix_compare(coa, &next_router->CoA, 
++				 next_router->pfix_len)) {
++		DEBUG(DBG_INFO, "DAD for Care-of address completed");
++		next_router->flags &= ~COA_TENTATIVE;
++	}
++	if (!(next_router->flags&LLADDR_TENTATIVE) && !(next_router->flags&COA_TENTATIVE)) {
++		DEBUG(DBG_INFO, "%s: Proceeding with handoff after DAD\n", __FUNCTION__);
++		tmp = curr_router;
++		curr_router = next_router;
++		curr_router->is_current = 1;
++		next_router = NULL; 
++		curr_router->flags &= ~COA_TENTATIVE; 
++		delete_routes(curr_router);
++		delete_coas(curr_router);
++		if (tmp) {
++			struct net_device *dev_old = dev_get_by_index(tmp->ifindex);
++			struct rt6_info *rt = NULL;
++			if (dev_old) {
++				rt = rt6_get_dflt_router(&tmp->ll_addr, dev_old);
++				dev_put(dev_old);
++			}
++			if (rt)
++				ip6_del_rt(rt, NULL);
++			tmp->is_current = 0;
++		}
++
++		ma_ctl_upd_iface(curr_router->ifindex, MA_IFACE_CURRENT, &dummy);
++		ma_ctl_upd_iface(curr_router->ifindex, MA_IFACE_CURRENT, &dummy);
++
++
++		ho.coa = &curr_router->CoA;
++		ho.plen = curr_router->pfix_len;
++		ho.ifindex = curr_router->ifindex;
++		ipv6_addr_copy(&ho.rtr_addr, &curr_router->raddr);
++		ho.home_address = (curr_router->glob_addr && 
++				    curr_router->flags&ND_RA_FLAG_HA);
++		
++		spin_unlock_bh(&router_lock);
++		mipv6_mobile_node_moved(&ho);
++	} else 
++		spin_unlock_bh(&router_lock);
++	return 0;
++}
++/* Decides whether router candidate is the same router as current rtr
++ * based on prefix / global addresses of the routers and their link local 
++ * addresses 
++ */
++static int is_current_rtr(struct router *nrt, struct router *crt)
++{
++	DEBUG_FUNC();
++	
++	DEBUG(DEBUG_MDETECT, "Current router: "
++	      "%x:%x:%x:%x:%x:%x:%x:%x and", NIPV6ADDR(&crt->raddr));
++	DEBUG(DEBUG_MDETECT, "Candidate router: "
++	      "%x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(&nrt->raddr));
++
++	return (!ipv6_addr_cmp(&nrt->raddr,&crt->raddr) && 
++		!ipv6_addr_cmp(&nrt->ll_addr, &crt->ll_addr));
++}
++
++/* 
++ * Change next router to nrtr
++ * Returns 1, if router has been changed.
++ */ 
++
++static int change_next_rtr(struct router *nrtr, struct router *ortr)
++{
++	int changed = 0;
++	DEBUG_FUNC();
++
++	if (!next_router || ipv6_addr_cmp(&nrtr->raddr, &next_router->raddr)) {
++		changed = 1;
++	}
++	next_router = nrtr;
++	return changed;
++}
++static int clean_ncache(struct router *nrt, struct router *ort, int same_if)
++{
++	struct net_device *ortdev;
++	DEBUG_FUNC();
++
++	/* Always call ifdown after a handoff to ensure proper routing */
++	
++	if (!ort) 
++		return 0;
++	if ((ortdev = dev_get_by_index(ort->ifindex)) == NULL) {
++		DEBUG(DBG_WARNING, "Device is not present");
++		return -1;
++	}
++	neigh_ifdown(&nd_tbl, ortdev);
++	dev_put(ortdev);	
++	return 0;
++}
++
++static int mdet_get_if_preference(int ifi)
++{
++	int pref = 0;
++
++	DEBUG_FUNC();
++
++	pref = ma_ctl_get_preference(ifi);
++
++	DEBUG(DEBUG_MDETECT, "ifi: %d preference %d", ifi, pref);
++
++	return pref;
++}
++
++/*
++ * Called from mipv6_mn_ra_rcv to determine whether to do a handoff. 
++ */
++static int mipv6_router_event(struct router *rptr)
++{
++	struct router *nrt = NULL;
++	int new_router = 0, same_if = 1;
++	int oldstate = _curr_state;
++	int addrtype = ipv6_addr_type(&rptr->raddr);
++
++	DEBUG_FUNC();
++
++	if (rptr->lifetime == 0)
++		return MIPV6_IGN_RTR;
++	DEBUG(DEBUG_MDETECT, "Received a RA from router: "
++	      "%x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(&rptr->raddr));
++	spin_lock(&router_lock);
++	
++	/* Add or update router entry */
++	if ((nrt = mipv6_rtr_get(&rptr->raddr)) == NULL) {
++		if (addrtype == IPV6_ADDR_ANY || (nrt = mipv6_rtr_add(rptr)) == NULL) {
++				spin_unlock(&router_lock);
++				return MIPV6_IGN_RTR;
++		}
++		DEBUG(DBG_INFO, "Router not on list,adding it to the list"); 
++		new_router = 1;
++	}
++	nrt->last_ra_rcvd = jiffies;
++	nrt->state = ROUTER_REACHABLE;
++	nrt->interval = rptr->interval;
++	nrt->lifetime = rptr->lifetime;
++	nrt->ifindex = rptr->ifindex;
++	nrt->flags = rptr->flags;
++	nrt->glob_addr = rptr->glob_addr;
++
++	/* Whether from current router */
++	if (curr_router && curr_router->reachable && 
++	    is_current_rtr(nrt, curr_router)) {
++		if (nrt->interval)
++			mod_timer(&r_timer, jiffies + (nrt->interval * HZ)/1000);
++		else
++			mod_timer(&r_timer, jiffies + max_rtr_reach_time * HZ);
++		mdet_statemachine(RA_RCVD);
++		spin_unlock(&router_lock);
++		return MIPV6_ADD_RTR;
++	} else if (oldstate == NO_RTR) {
++		rt6_purge_dflt_routers(0); /* For multiple interface case */
++		DEBUG(DBG_INFO, "No router or router not reachable, switching to new one");   
++		goto handoff;
++	}
++	if (!curr_router) { 
++	        /* Startup */
++	        goto handoff;
++	}
++	/* Router behind same interface as current one ?*/
++	same_if = (nrt->ifindex == curr_router->ifindex);
++	/* Switch to new router behind same interface if eager cell 
++	 *  switching is used or if the interface is preferred
++	 */
++	if ((new_router && eager_cell_switching && same_if) ||
++	    (mdet_get_if_preference(nrt->ifindex) > 
++	     mdet_get_if_preference(curr_router->ifindex))) {
++		DEBUG(DBG_INFO, "Switching to new router.");
++		goto handoff;
++	}
++	
++	/* No handoff, don't add default route */
++	DEBUG(DEBUG_MDETECT, "Ignoring RA");
++	spin_unlock(&router_lock);
++	return MIPV6_IGN_RTR;
++handoff:
++	clean_ncache(nrt, curr_router, same_if);
++	nrt->reachable = 1;
++	if (same_if && change_next_rtr(nrt, curr_router)) {
++		mipv6_do_ll_dad(nrt->ifindex);
++		nrt->flags |= LLADDR_TENTATIVE;
++	}
++	spin_unlock(&router_lock);
++
++	return MIPV6_CHG_RTR;
++}	
++
++/* 
++ * Called from ndisc.c's router_discovery.
++ */
++
++static inline int ret_to_ha(struct in6_addr *addr)
++{
++	int res = 0;
++	struct mn_info *minfo;
++	read_lock(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_ha(addr);
++	if (minfo != NULL) {
++		spin_lock(&minfo->lock);
++		if (minfo->has_home_reg) {
++			res = 1;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock(&mn_info_lock);
++	return res;
++}
++
++static int mipv6_mn_ra_rcv(struct sk_buff *skb, struct ndisc_options *ndopts)
++{
++	int ifi = ((struct inet6_skb_parm *)skb->cb)->iif;
++	struct ra_msg *ra = (struct ra_msg *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct router nrt;
++	struct in6_addr *ha = NULL;
++	u8 *lladdr = NULL;
++	int res;
++	DEBUG_FUNC();
++
++	memset(&nrt, 0, sizeof(struct router));
++
++	if (ra->icmph.icmp6_home_agent) {
++		nrt.flags |= ND_RA_FLAG_HA;
++		DEBUG(DBG_DATADUMP, "RA has ND_RA_FLAG_HA up");
++	}
++
++	if (ra->icmph.icmp6_addrconf_managed) {
++		nrt.flags |= ND_RA_FLAG_MANAGED;
++		DEBUG(DBG_DATADUMP, "RA has ND_RA_FLAG_MANAGED up");
++	}
++
++	if (ra->icmph.icmp6_addrconf_other) {
++		nrt.flags |= ND_RA_FLAG_OTHER;
++		DEBUG(DBG_DATADUMP, "RA has ND_RA_FLAG_OTHER up");
++	}
++
++	ipv6_addr_copy(&nrt.ll_addr, saddr);
++	nrt.ifindex = ifi;
++	nrt.lifetime = ntohs(ra->icmph.icmp6_rt_lifetime);
++
++	if (ndopts->nd_opts_src_lladdr) {
++		lladdr = (u8 *) ndopts->nd_opts_src_lladdr+2;
++		nrt.link_addr_len = skb->dev->addr_len;
++		memcpy(nrt.link_addr, lladdr, nrt.link_addr_len);
++	}
++	if (ndopts->nd_opts_pi) {
++		struct nd_opt_hdr *p;
++		for (p = ndopts->nd_opts_pi;
++		     p;
++		     p = ndisc_next_option(p, ndopts->nd_opts_pi_end)) {
++			struct prefix_info *pinfo;
++			int update = 0;
++
++			pinfo = (struct prefix_info *) p;
++
++			if (!pinfo->autoconf)
++				continue;
++
++			if ((pinfo->router_address && 
++			     (update = ret_to_ha(&pinfo->prefix))) ||
++			    ipv6_addr_type(&nrt.raddr) != IPV6_ADDR_UNICAST) {
++				ipv6_addr_copy(&nrt.raddr, &pinfo->prefix);
++				nrt.pfix_len = pinfo->prefix_len;
++				if (pinfo->router_address)
++					nrt.glob_addr = 1;
++				else
++					nrt.glob_addr = 0;
++				if (update)
++					ha = &pinfo->prefix;
++				DEBUG(DBG_DATADUMP, "Address of the received "
++				      "prefix info option: %x:%x:%x:%x:%x:%x:%x:%x", 
++				      NIPV6ADDR(&nrt.raddr));
++				DEBUG(DBG_DATADUMP, "the length of the prefix is %d", 
++				      nrt.pfix_len);
++			}
++		}
++	}
++	if (ndopts->nd_opts_rai) {			
++		nrt.interval = ntohl(*(__u32 *)(ndopts->nd_opts_rai+4));
++		DEBUG(DBG_DATADUMP, 
++		      "received router interval option with interval : %d ",
++		      nrt.interval / HZ);
++
++		if (nrt.interval > MAX_RADV_INTERVAL) {
++			nrt.interval = 0;
++			DEBUG(DBG_DATADUMP, "but we are using: %d, "
++			      "because interval>MAX_RADV_INTERVAL",
++			      nrt.interval / HZ);
++		}
++	}
++
++	res = mipv6_router_event(&nrt);
++	
++	if (ha && lladdr) {
++		mipv6_mn_ha_nd_update(__dev_get_by_index(ifi), ha, lladdr);
++	}
++	return res;
++}
++
++int __init mipv6_initialize_mdetect(void)
++{
++
++	DEBUG_FUNC();
++
++	spin_lock_init(&router_lock);
++	spin_lock_init(&ho_lock);
++	init_timer(&coa_timer);
++	init_timer(&r_timer);
++	r_timer.expires = jiffies + HZ;
++	add_timer(&r_timer);
++
++	/* Actual HO, also deletes old routes after the addition of new ones 
++	   in ndisc */
++	MIPV6_SETCALL(mipv6_change_router, mipv6_change_router);
++
++	MIPV6_SETCALL(mipv6_ra_rcv, mipv6_mn_ra_rcv);
++
++	return 0;
++}
++
++int __exit mipv6_shutdown_mdetect()
++{
++
++	DEBUG_FUNC();
++
++	MIPV6_RESETCALL(mipv6_ra_rcv);
++	MIPV6_RESETCALL(mipv6_change_router);
++	spin_lock_bh(&router_lock);
++	spin_lock(&ho_lock);
++	del_timer(&coa_timer);
++	del_timer(&r_timer);
++	/* Free the memory allocated by router list */
++	list_free(&curr_router);
++	if (_ho)
++		kfree(_ho);
++	spin_unlock(&ho_lock);
++	spin_unlock_bh(&router_lock);
++	return 0;
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mdetect.h linux-2.4.25/net/ipv6/mobile_ip6/mdetect.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mdetect.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mdetect.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,37 @@
++/*
++ *      MIPL Mobile IPv6 Movement detection module header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MDETECT_H
++#define _MDETECT_H
++
++struct handoff {
++	int home_address; /* Is the coa a home address */
++	int ifindex;
++	int plen;
++	struct in6_addr *coa;
++	struct in6_addr rtr_addr; /* Prefix or rtr address if coa is home address */
++};
++
++int mipv6_initialize_mdetect(void);
++
++int mipv6_shutdown_mdetect(void);
++
++int mipv6_get_care_of_address(struct in6_addr *homeaddr, struct in6_addr *coa);
++
++int mipv6_mdet_del_if(int ifindex);
++
++int mipv6_mdet_finalize_ho(const struct in6_addr *coa, const int ifindex);
++
++void mipv6_mdet_retrigger_ho(void);
++
++void mipv6_mdet_set_curr_rtr_reachable(int reachable);
++
++#endif /* _MDETECT_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp.c linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,342 @@
++/**
++ * Generic icmp routines
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>,
++ * Ville Nuorvala <vnuorval@tcs.hut.fi> 
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/icmpv6.h>
++#include <net/checksum.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++#include <net/mipglue.h>
++
++#include "debug.h"
++#include "bcache.h"
++#include "mipv6_icmp.h"
++#include "config.h"
++
++struct mipv6_icmpv6_msg {
++	struct icmp6hdr icmph;
++	__u8 *data;
++	struct in6_addr *daddr;
++	int len;
++	__u32 csum;
++};
++
++#define MIPV6_ICMP_HOP_LIMIT 64
++
++static struct socket *mipv6_icmpv6_socket = NULL;
++static __u16 identifier = 0;
++
++int mipv6_icmpv6_no_rcv(struct sk_buff *skb)
++{
++	return 0;
++}
++
++static int mipv6_icmpv6_xmit_holder = -1;
++
++static int mipv6_icmpv6_xmit_lock_bh(void)
++{
++	if (!spin_trylock(&mipv6_icmpv6_socket->sk->lock.slock)) {
++		if (mipv6_icmpv6_xmit_holder == smp_processor_id())
++			return -EAGAIN;
++		spin_lock(&mipv6_icmpv6_socket->sk->lock.slock);
++	}
++	mipv6_icmpv6_xmit_holder = smp_processor_id();
++	return 0;
++}
++
++static __inline__ int mipv6_icmpv6_xmit_lock(void)
++{
++	int ret;
++	local_bh_disable();
++	ret = mipv6_icmpv6_xmit_lock_bh();
++	if (ret)
++		local_bh_enable();
++	return ret;
++}
++
++static void mipv6_icmpv6_xmit_unlock_bh(void)
++{
++	mipv6_icmpv6_xmit_holder = -1;
++	spin_unlock(&mipv6_icmpv6_socket->sk->lock.slock);
++}
++
++static __inline__ void mipv6_icmpv6_xmit_unlock(void)
++{
++	mipv6_icmpv6_xmit_unlock_bh();
++	local_bh_enable();
++}
++
++
++/**
++ * mipv6_icmpv6_dest_unreach - Destination Unreachable ICMP error message handler
++ * @skb: buffer containing ICMP error message
++ *
++ * Special Mobile IPv6 ICMP handling.  If Correspondent Node receives
++ * persistent ICMP Destination Unreachable messages for a destination
++ * in its Binding Cache, the binding should be deleted.  See draft
++ * section 8.8.
++ **/
++static int mipv6_icmpv6_rcv_dest_unreach(struct sk_buff *skb)
++{
++	struct icmp6hdr *icmph = (struct icmp6hdr *) skb->h.raw;
++	struct ipv6hdr *ipv6h = (struct ipv6hdr *) (icmph + 1);
++	int left = (skb->tail - skb->h.raw) - sizeof(*icmph)- sizeof(ipv6h);
++	struct ipv6_opt_hdr *eh;
++	struct rt2_hdr *rt2h = NULL;
++	struct in6_addr *daddr = &ipv6h->daddr;
++	struct in6_addr *saddr = &ipv6h->saddr;
++	int hdrlen, nexthdr = ipv6h->nexthdr;
++	struct mipv6_bce bce;
++	DEBUG_FUNC();
++
++	eh = (struct ipv6_opt_hdr *) (ipv6h + 1);
++
++	while (left > 0) {
++		if (nexthdr != NEXTHDR_HOP && nexthdr != NEXTHDR_DEST && 
++		    nexthdr != NEXTHDR_ROUTING)
++			return 0;
++
++		hdrlen = ipv6_optlen(eh);
++		if (hdrlen > left)
++			return 0;
++
++		if (nexthdr == NEXTHDR_ROUTING) {
++			struct ipv6_rt_hdr *rth = (struct ipv6_rt_hdr *) eh;
++
++			if (rth->type == IPV6_SRCRT_TYPE_2) {
++				if (hdrlen != sizeof(struct rt2_hdr))
++					return 0;
++
++				rt2h = (struct rt2_hdr *) rth;
++
++				if (rt2h->rt_hdr.segments_left > 0)
++					daddr = &rt2h->addr;
++				break;
++			}
++		}
++		/* check for home address option in case this node is a MN */
++		if (nexthdr == NEXTHDR_DEST) {
++			__u8 *raw = (__u8 *) eh;
++			__u16 i = 2;
++			while (1) {
++				struct mipv6_dstopt_homeaddr *hao;
++				
++				if (i + sizeof (*hao) > hdrlen)
++					break;
++				
++				hao = (struct mipv6_dstopt_homeaddr *) &raw[i];
++				
++				if (hao->type == MIPV6_TLV_HOMEADDR &&
++				    hao->length == sizeof(struct in6_addr)) {
++					saddr = &hao->addr;
++					break;
++				}
++				if (hao->type)
++					i += hao->length + 2;
++				else
++					i++;
++			}
++			
++		}
++		nexthdr = eh->nexthdr;
++		eh = (struct ipv6_opt_hdr *) ((u8 *) eh + hdrlen);
++		left -= hdrlen;
++	}
++	if (rt2h == NULL) return 0;
++
++	if (mipv6_bcache_get(daddr, saddr, &bce) == 0 && !(bce.flags&HOME_REGISTRATION)) {
++		/* A primitive algorithm for detecting persistent ICMP destination unreachable messages */
++		if (bce.destunr_count &&
++		    time_after(jiffies, 
++			       bce.last_destunr + MIPV6_DEST_UNR_IVAL*HZ)) 
++			bce.destunr_count = 0;
++
++		bce.destunr_count++;
++
++		mipv6_bcache_icmp_err(daddr, saddr, bce.destunr_count);
++
++		if (bce.destunr_count > MIPV6_MAX_DESTUNREACH && mipv6_bcache_delete(daddr, saddr, CACHE_ENTRY) == 0) {
++			DEBUG(DBG_INFO, "Deleted bcache entry "
++			      "%x:%x:%x:%x:%x:%x:%x:%x "
++			      "%x:%x:%x:%x:%x:%x:%x:%x (reason: "
++			      "%d dest unreachables) ",
++			      NIPV6ADDR(daddr), NIPV6ADDR(saddr), bce.destunr_count);
++		}
++	}
++	return 0;
++}
++
++static int mipv6_icmpv6_getfrag(const void *data, struct in6_addr *saddr, 
++				char *buff, unsigned int offset, 
++				unsigned int len)
++{
++	struct mipv6_icmpv6_msg *msg = (struct mipv6_icmpv6_msg *) data;
++	struct icmp6hdr *icmph;
++	__u32 csum;
++
++	if (offset) {
++		msg->csum = csum_partial_copy_nocheck(msg->data + offset -
++						      sizeof(*icmph), buff,
++						      len, msg->csum);
++		return 0;
++	}
++	
++	csum = csum_partial_copy_nocheck((__u8 *) &msg->icmph, buff,
++					 sizeof(*icmph), msg->csum);
++	
++	csum = csum_partial_copy_nocheck(msg->data, buff + sizeof(*icmph),
++					 len - sizeof(*icmph), csum);
++	
++	icmph = (struct icmp6hdr *) buff;
++	
++	icmph->icmp6_cksum = csum_ipv6_magic(saddr, msg->daddr, msg->len,
++					     IPPROTO_ICMPV6, csum);
++	return 0; 
++}
++
++/**
++ * mipv6_icmpv6_send - generic icmpv6 message send
++ * @daddr: destination address
++ * @saddr: source address
++ * @type: icmp type
++ * @code: icmp code
++ * @id: packet identifier. If null, uses internal counter to get new id
++ * @data: packet data
++ * @datalen: length of data in bytes
++ */
++void mipv6_icmpv6_send(struct in6_addr *daddr, struct in6_addr *saddr, int type,
++		       int code, __u16 *id, __u16 flags, void *data, int datalen)
++{
++	struct sock *sk = mipv6_icmpv6_socket->sk;
++	struct flowi fl;
++	struct mipv6_icmpv6_msg msg;
++
++	DEBUG_FUNC();
++
++	fl.proto = IPPROTO_ICMPV6;
++	fl.fl6_dst = daddr;
++	fl.fl6_src = saddr;
++	fl.fl6_flowlabel = 0;
++	fl.uli_u.icmpt.type = type;
++	fl.uli_u.icmpt.code = code;
++
++	msg.icmph.icmp6_type = type;
++	msg.icmph.icmp6_code = code;
++	msg.icmph.icmp6_cksum = 0;
++
++	if (id)
++		msg.icmph.icmp6_identifier = htons(*id);
++	else
++		msg.icmph.icmp6_identifier = htons(identifier++);
++
++	msg.icmph.icmp6_sequence = htons(flags);
++	msg.data = data;
++	msg.csum = 0;
++	msg.len = datalen + sizeof(struct icmp6hdr);
++	msg.daddr = daddr;
++
++	if (mipv6_icmpv6_xmit_lock())
++		return;
++
++	ip6_build_xmit(sk, mipv6_icmpv6_getfrag, &msg, &fl, msg.len, NULL, -1,
++		       MSG_DONTWAIT);
++
++	ICMP6_INC_STATS_BH(Icmp6OutMsgs);
++	mipv6_icmpv6_xmit_unlock();
++}
++
++/**
++ * icmp6_rcv - ICMPv6 receive and multiplex
++ * @skb: buffer containing ICMP message
++ *
++ * Generic ICMPv6 receive function to multiplex messages to approriate
++ * handlers.  Only used for ICMP messages with special handling in
++ * Mobile IPv6.
++ **/
++static void icmp6_rcv(struct sk_buff *skb)
++{
++	struct icmp6hdr *hdr;
++
++	if (skb_is_nonlinear(skb) &&
++	    skb_linearize(skb, GFP_ATOMIC) != 0) {
++		kfree_skb(skb);
++		return;
++	}
++	__skb_push(skb, skb->data-skb->h.raw);
++
++	hdr = (struct icmp6hdr *) skb->h.raw;
++
++	switch (hdr->icmp6_type) {
++	case ICMPV6_DEST_UNREACH:
++		mipv6_icmpv6_rcv_dest_unreach(skb);
++		break;
++
++	case ICMPV6_PARAMPROB:
++		mip6_fn.icmpv6_paramprob_rcv(skb);
++		break;
++
++	case MIPV6_DHAAD_REPLY:
++		mip6_fn.icmpv6_dhaad_rep_rcv(skb);
++		break;
++
++	case MIPV6_PREFIX_ADV:
++		mip6_fn.icmpv6_pfxadv_rcv(skb);
++		break;
++
++	case MIPV6_DHAAD_REQUEST:
++		mip6_fn.icmpv6_dhaad_req_rcv(skb);
++		break;
++
++	case MIPV6_PREFIX_SOLICIT:
++		mip6_fn.icmpv6_pfxsol_rcv(skb);
++		break;
++	}
++}
++
++int mipv6_icmpv6_init(void)
++{
++	struct sock *sk;
++	int err;
++
++	if ((mipv6_icmpv6_socket = sock_alloc()) == NULL) {
++		DEBUG(DBG_ERROR, "Cannot allocate mipv6_icmpv6_socket");
++		return -1;
++	}
++	mipv6_icmpv6_socket->type = SOCK_RAW;
++
++	if ((err = sock_create(PF_INET6, SOCK_RAW, IPPROTO_ICMP, 
++			       &mipv6_icmpv6_socket)) < 0) {
++		DEBUG(DBG_ERROR, "Cannot initialize mipv6_icmpv6_socket");
++		sock_release(mipv6_icmpv6_socket);
++		mipv6_icmpv6_socket = NULL; /* For safety */
++		return err;
++	}
++	sk = mipv6_icmpv6_socket->sk;
++	sk->allocation = GFP_ATOMIC;
++	sk->prot->unhash(sk);
++
++	/* Register our ICMP handler */
++	MIPV6_SETCALL(mipv6_icmp_rcv, icmp6_rcv);
++	return 0;
++}
++
++void mipv6_icmpv6_exit(void)
++{
++	MIPV6_RESETCALL(mipv6_icmp_rcv);
++	if (mipv6_icmpv6_socket)
++		sock_release(mipv6_icmpv6_socket);
++	mipv6_icmpv6_socket = NULL; /* For safety */
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp.h linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,43 @@
++/*
++ *      MIPL Mobile IPv6 ICMP send and receive prototypes
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MIPV6_ICMP
++#define _MIPV6_ICMP
++
++#include <linux/config.h>
++#include <linux/in6.h>
++
++void mipv6_icmpv6_send(struct in6_addr *daddr, struct in6_addr *saddr,
++		       int type, int code, __u16 *id, __u16 flags,
++		       void *data, int datalen);
++
++void mipv6_icmpv6_send_dhaad_req(struct in6_addr *home_addr, int plen, __u16 dhaad_id);
++
++void mipv6_icmpv6_send_dhaad_rep(int ifindex, __u16 id, struct in6_addr *daddr);
++/* No handling */
++int mipv6_icmpv6_no_rcv(struct sk_buff *skb);
++
++/* Receive DHAAD Reply message */
++int mipv6_icmpv6_rcv_dhaad_rep(struct sk_buff *skb);
++/* Receive Parameter Problem message */
++int mipv6_icmpv6_rcv_paramprob(struct sk_buff *skb);
++/* Receive prefix advertisements */
++int mipv6_icmpv6_rcv_pfx_adv(struct sk_buff *skb);
++
++/* Receive DHAAD Request message */
++int mipv6_icmpv6_rcv_dhaad_req(struct sk_buff *skb);
++/* Receive prefix solicitations */
++int mipv6_icmpv6_rcv_pfx_sol(struct sk_buff *skb);
++
++int mipv6_icmpv6_init(void);
++void mipv6_icmpv6_exit(void);
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp_ha.c linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp_ha.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp_ha.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp_ha.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,158 @@
++/*
++ *	Home Agent specific ICMP routines
++ *
++ *	Authors:
++ *	Antti Tuominen	<ajtuomin@tml.hut.fi>
++ *	Jaakko Laine	<medved@iki.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "halist.h"
++#include "debug.h"
++#include "mipv6_icmp.h"
++//#include "prefix.h"
++
++/* Is this the easiest way of checking on 
++ *  which interface an anycast address is ?
++ */
++static int find_ac_dev(struct in6_addr *addr)
++{
++	int ifindex = 0;
++	struct net_device *dev;
++	read_lock(&dev_base_lock);
++	for (dev=dev_base; dev; dev=dev->next) {
++		if (ipv6_chk_acast_addr(dev, addr)) {
++			ifindex = dev->ifindex;
++			break;
++		}
++	}
++	read_unlock(&dev_base_lock);
++	return ifindex;
++}
++
++/**
++ * mipv6_icmpv6_send_dhaad_rep - Reply to DHAAD Request
++ * @ifindex: index of interface request was received from
++ * @id: request's identification number
++ * @daddr: requester's IPv6 address
++ *
++ * When Home Agent receives Dynamic Home Agent Address Discovery
++ * request, it replies with a list of home agents available on the
++ * home link.
++ */
++void mipv6_icmpv6_send_dhaad_rep(int ifindex, __u16 id, struct in6_addr *daddr)
++{
++	__u8 *data = NULL;
++	struct in6_addr home, *ha_addrs = NULL;
++	int addr_count, max_addrs, size = 0;
++
++	if (daddr == NULL)
++		return;
++
++	if (mipv6_ha_get_addr(ifindex, &home) < 0) {
++		DEBUG(DBG_INFO, "Not Home Agent in this interface");
++		return;
++	}
++
++	/* We send all available HA addresses, not exceeding a maximum
++	 * number we can fit in a packet with minimum IPv6 MTU (to
++	 * avoid fragmentation).
++	 */
++	max_addrs = 76;
++	addr_count = mipv6_ha_get_pref_list(ifindex, &ha_addrs, max_addrs);
++
++	if (addr_count < 0) return;
++
++	if (addr_count != 0 && ha_addrs == NULL) {
++		DEBUG(DBG_ERROR, "addr_count = %d but return no addresses", 
++		      addr_count);
++		return;
++	}
++	data = (u8 *)ha_addrs;
++
++	size = addr_count * sizeof(struct in6_addr);
++
++	mipv6_icmpv6_send(daddr, &home, MIPV6_DHAAD_REPLY, 
++			  0, &id, 0, data, size);
++	if (ha_addrs) {
++		data = NULL;
++		kfree(ha_addrs);
++	}
++}
++
++/** 
++ * mipv6_icmpv6_dhaad_req - Home Agent Address Discovery Request ICMP handler
++ * @skb: buffer containing ICMP information message
++ *
++ * Special Mobile IPv6 ICMP message.  Handles Dynamic Home Agent
++ * Address Discovery Request messages.
++ **/
++int mipv6_icmpv6_rcv_dhaad_req(struct sk_buff *skb)
++{
++	struct icmp6hdr *phdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
++	__u16 identifier;
++	int ifindex = 0;
++
++	DEBUG_FUNC();
++
++	/* Invalid packet checks. */
++	if (phdr->icmp6_code != 0)
++		return 0;
++
++	identifier = ntohs(phdr->icmp6_identifier);
++
++	/* 
++	 * Make sure we have the right ifindex (if the
++	 * req came through another interface. 
++	 */
++	ifindex = find_ac_dev(daddr);
++	if (ifindex == 0) { 
++		DEBUG(DBG_WARNING, "received dhaad request to anycast address %x:%x:%x:%x:%x:%x:%x:%x"
++		      " on which prefix we are not HA",
++		      NIPV6ADDR(daddr));
++		return 0;
++	}
++
++	/*
++	 * send reply with list
++	 */
++	mipv6_icmpv6_send_dhaad_rep(ifindex, identifier, saddr);
++	return 1;
++}
++#if 0
++/**
++ * mipv6_icmpv6_handle_pfx_sol - handle prefix solicitations
++ * @skb: sk_buff including the icmp6 message
++ */
++int mipv6_icmpv6_rcv_pfx_sol(struct sk_buff *skb)
++{
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
++	struct inet6_ifaddr *ifp;
++
++	DEBUG_FUNC();
++
++	if (!(ifp = ipv6_get_ifaddr(daddr, NULL)))
++		return -1;
++
++	in6_ifa_put(ifp);
++	mipv6_pfx_cancel_send(saddr, -1);
++
++	return 0;
++}
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp_mn.c linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp_mn.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mipv6_icmp_mn.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mipv6_icmp_mn.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,273 @@
++/*
++ *	Mobile Node specific ICMP routines
++ *
++ *	Authors:
++ *	Antti Tuominen	<ajtuomin@tml.hut.fi>
++ *	Jaakko Laine	<medved@iki.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/sched.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "mn.h"
++#include "bul.h"
++#include "mdetect.h"
++#include "debug.h"
++#include "mipv6_icmp.h"
++#include "util.h"
++//#include "prefix.h"
++
++#define INFINITY 0xffffffff
++
++/**
++ * mipv6_icmpv6_paramprob - Parameter Problem ICMP error message handler
++ * @skb: buffer containing ICMP error message
++ *
++ * Special Mobile IPv6 ICMP handling.  If Mobile Node receives ICMP
++ * Parameter Problem message when using a Home Address Option,
++ * offending node should be logged and error message dropped.  If
++ * error is received because of a Binding Update, offending node
++ * should be recorded in Binding Update List and no more Binding
++ * Updates should be sent to this destination.  See RFC 3775 section
++ * 10.15.
++ **/
++int mipv6_icmpv6_rcv_paramprob(struct sk_buff *skb)
++{
++	struct icmp6hdr *phdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *saddr = skb ? &skb->nh.ipv6h->saddr : NULL;
++	struct in6_addr *daddr = skb ? &skb->nh.ipv6h->daddr : NULL;
++	struct ipv6hdr *hdr = (struct ipv6hdr *) (phdr + 1);
++	int ulen = (skb->tail - (unsigned char *) (phdr + 1));
++
++	int errptr;
++	__u8 *off_octet;
++
++	DEBUG_FUNC();
++
++	/* We only handle code 1 & 2 messages. */
++	if (phdr->icmp6_code != ICMPV6_UNK_NEXTHDR &&
++	    phdr->icmp6_code != ICMPV6_UNK_OPTION)
++		return 0;
++
++	/* Find offending octet in the original packet. */
++	errptr = ntohl(phdr->icmp6_pointer);
++
++	/* There is not enough of the original packet left to figure
++	 * out what went wrong. Bail out. */
++	if (ulen <= errptr)
++		return 0;
++
++	off_octet = ((__u8 *) hdr + errptr);
++	DEBUG(DBG_INFO, "Parameter problem: offending octet %d [0x%2x]",
++	      errptr, *off_octet);
++
++	/* If CN did not understand Mobility Header, set BUL entry to
++	 * ACK_ERROR so no further BUs are sumbitted to this CN. */
++	if (phdr->icmp6_code == ICMPV6_UNK_NEXTHDR &&
++	    *off_octet == IPPROTO_MOBILITY) {
++		struct bul_inval_args args;
++		args.all_rr_states = 1;
++		args.cn = saddr;
++		args.mn = daddr;
++		write_lock(&bul_lock);
++		mipv6_bul_iterate(mn_bul_invalidate, &args);
++		write_unlock(&bul_lock);
++	}
++
++	/* If CN did not understand Home Address Option, we log an
++	 * error and discard the error message. */
++	if (phdr->icmp6_code == ICMPV6_UNK_OPTION &&
++	    *off_octet == MIPV6_TLV_HOMEADDR) {
++		DEBUG(DBG_WARNING, "Correspondent node does not "
++		      "implement Home Address Option receipt.");
++		return 1;
++	}
++	return 0;
++}
++
++/**
++ * mipv6_mn_dhaad_send_req - Send DHAAD Request to home network
++ * @home_addr: address to do DHAAD for
++ * @plen: prefix length for @home_addr
++ *
++ * Send Dynamic Home Agent Address Discovery Request to the Home
++ * Agents anycast address in the nodes home network.
++ **/
++void 
++mipv6_icmpv6_send_dhaad_req(struct in6_addr *home_addr, int plen, __u16 dhaad_id)
++{
++	struct in6_addr ha_anycast;
++	struct in6_addr careofaddr;
++	
++	if (mipv6_get_care_of_address(home_addr, &careofaddr) < 0) {
++		DEBUG(DBG_WARNING, "Could not get node's Care-of Address");
++		return;
++	}
++
++	if (mipv6_ha_anycast(&ha_anycast, home_addr, plen) < 0) {
++		DEBUG(DBG_WARNING, 
++		      "Could not get Home Agent Anycast address for home address %x:%x.%x:%x:%x:%x:%x:%x/%d",
++		      NIPV6ADDR(home_addr), plen);
++		return;
++	}
++
++	mipv6_icmpv6_send(&ha_anycast, &careofaddr, MIPV6_DHAAD_REQUEST, 0, 
++			  &dhaad_id, 0, NULL, 0);
++
++}
++
++/** 
++ * mipv6_icmpv6_dhaad_rep - Home Agent Address Discovery Reply ICMP handler
++ * @skb: buffer containing ICMP information message
++ *
++ * Special Mobile IPv6 ICMP message.  Handles Dynamic Home Agent
++ * Address Discovery Reply messages.
++ **/
++int mipv6_icmpv6_rcv_dhaad_rep(struct sk_buff *skb)
++{
++	struct icmp6hdr *phdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *address;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	__u16 identifier;
++	int ulen = (skb->tail - (unsigned char *) ((__u32 *) phdr + 2));
++	int i;
++	struct in6_addr home_addr, coa;
++	struct in6_addr *first_ha = NULL;
++	struct mn_info *minfo;
++	int n_addr = ulen / sizeof(struct in6_addr);
++
++	DEBUG_FUNC();
++
++	/* Invalid packet checks. */
++	if (ulen % sizeof(struct in6_addr) != 0)
++		return 0;
++
++	if (phdr->icmp6_code != 0)
++		return 0;
++
++	identifier = ntohs(phdr->icmp6_identifier);
++	if (ulen > 0) {
++		address = (struct in6_addr *) ((__u32 *) phdr + 2);
++	} else {
++		address = saddr;
++		n_addr = 1;
++	}
++
++	/* receive list of home agent addresses
++	 * add to home agents list
++	 */
++	DEBUG(DBG_INFO, "DHAAD: got %d home agents", n_addr);
++
++	first_ha = address;
++
++	/* lookup H@ with identifier */
++	read_lock(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_id(identifier);
++	if (!minfo) {
++		read_unlock(&mn_info_lock);
++		DEBUG(DBG_INFO, "no mninfo with id %d", 
++		      identifier);
++		return 0;
++	}
++	spin_lock(&minfo->lock);
++
++	/* Logic:
++	 * 1. if old HA on list, prefer it
++	 * 2. otherwise first HA on list prefered
++	 */
++	for (i = 0; i < n_addr; i++) {
++		DEBUG(DBG_INFO, "HA[%d] %x:%x:%x:%x:%x:%x:%x:%x",
++		      i, NIPV6ADDR(address));
++		if (ipv6_addr_cmp(&minfo->ha, address) == 0) {
++			spin_unlock(&minfo->lock);
++			read_unlock(&mn_info_lock);
++			return 0;
++		}
++		address++;
++	}
++	ipv6_addr_copy(&minfo->ha, first_ha);
++	spin_unlock(&minfo->lock);
++	ipv6_addr_copy(&home_addr, &minfo->home_addr);
++	read_unlock(&mn_info_lock);
++
++	mipv6_get_care_of_address(&home_addr, &coa);
++	init_home_registration(&home_addr, &coa);
++
++	return 1;
++}
++#if 0
++/**
++ * mipv6_icmpv6_handle_pfx_adv - handle prefix advertisements
++ * @skb: sk_buff including the icmp6 message
++ */
++int mipv6_icmpv6_rcv_pfx_adv(struct sk_buff *skb)
++{
++	struct icmp6hdr *hdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
++	__u8 *opt = (__u8 *) (hdr + 1);
++	int optlen = (skb->tail - opt);
++	unsigned long min_expire = INFINITY;
++	struct inet6_skb_parm *parm = (struct inet6_skb_parm *) skb->cb;
++
++	DEBUG_FUNC();
++
++	while (optlen > 0) {
++		int len = opt[1] << 3;
++		if (len == 0)
++			goto set_timer;
++
++		if (opt[0] == ND_OPT_PREFIX_INFO) {
++			int ifindex;
++			unsigned long expire;
++			struct prefix_info *pinfo =
++				(struct prefix_info *) opt;
++			struct net_device *dev;
++			struct mn_info *mninfo;
++
++			read_lock(&mn_info_lock);
++			mninfo = mipv6_mninfo_get_by_ha(saddr);
++			if (mninfo == NULL) {
++				ifindex = 0;
++			} else {
++				spin_lock(&mninfo->lock);
++				ifindex = mninfo->ifindex;
++				spin_unlock(&mninfo->lock);
++				mninfo = NULL;
++			}
++			read_unlock(&mn_info_lock);
++
++			if (!(dev = dev_get_by_index(ifindex))) {
++				DEBUG(DBG_WARNING, "Cannot find device by index %d", parm->iif);
++				goto nextopt;
++			}
++
++			expire = ntohl(pinfo->valid);
++			expire = expire == 0 ? INFINITY : expire;
++
++			min_expire = expire < min_expire ? expire : min_expire;
++
++			dev_put(dev);
++		}
++
++nextopt:
++		optlen -= len;
++		opt += len;
++	}
++
++set_timer:
++
++	mipv6_pfx_add_home(parm->iif, saddr, daddr, min_expire);
++	return 0;
++}
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mn.c linux-2.4.25/net/ipv6/mobile_ip6/mn.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mn.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mn.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,1521 @@
++/*
++ *      Mobile-node functionality
++ *
++ *      Authors:
++ *      Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/ipv6.h>
++#include <linux/net.h>
++#include <linux/init.h>
++#include <linux/skbuff.h>
++#include <linux/rtnetlink.h>
++#include <linux/if_arp.h>
++#include <linux/ipsec.h>
++#include <linux/notifier.h>
++#include <linux/list.h>
++#include <linux/route.h>
++#include <linux/netfilter.h>
++#include <linux/netfilter_ipv6.h>
++#include <linux/tqueue.h>
++#include <linux/proc_fs.h>
++
++#include <asm/uaccess.h>
++
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/neighbour.h>
++#include <net/ndisc.h>
++#include <net/ip6_route.h>
++#include <net/mipglue.h>
++
++#include "util.h"
++#include "mdetect.h"
++#include "bul.h"
++#include "mobhdr.h"
++#include "debug.h"
++#include "mn.h"
++#include "mipv6_icmp.h"
++#include "multiaccess_ctl.h"
++//#include "prefix.h"
++#include "tunnel_mn.h"
++#include "stats.h"
++#include "config.h"
++
++#define MIPV6_BUL_SIZE 128
++
++static LIST_HEAD(mn_info_list);
++
++/* Lock for list of MN infos */
++rwlock_t mn_info_lock = RW_LOCK_UNLOCKED;
++
++static spinlock_t ifrh_lock = SPIN_LOCK_UNLOCKED;
++
++struct ifr_holder {
++	struct list_head list;
++	struct in6_ifreq ifr;
++	int old_ifi;
++	struct handoff *ho;
++};
++
++LIST_HEAD(ifrh_list);
++
++static struct tq_struct mv_home_addr_task;
++
++/* Determines whether manually configured home addresses are preferred as 
++ * source addresses over dynamically configured ones
++ */
++int mipv6_use_preconfigured_hoaddr = 1; 
++
++/* Determines whether home addresses, which are at home are preferred as 
++ * source addresses over other home addresses
++ */
++int mipv6_use_topol_corr_hoaddr = 0;
++
++static spinlock_t icmpv6_id_lock = SPIN_LOCK_UNLOCKED;
++static __u16 icmpv6_id = 0;
++
++static inline __u16 mipv6_get_dhaad_id(void)
++{
++	__u16 ret;
++	spin_lock_bh(&icmpv6_id_lock);
++	ret = ++icmpv6_id;
++	spin_unlock_bh(&icmpv6_id_lock);
++	return ret;
++}
++
++/** 
++ * mipv6_mninfo_get_by_home - Returns mn_info for a home address
++ * @haddr: home address of MN
++ *
++ * Returns mn_info on success %NULL otherwise.  Caller MUST hold
++ * @mn_info_lock (read or write).
++ **/
++struct mn_info *mipv6_mninfo_get_by_home(struct in6_addr *haddr)
++{
++	struct list_head *lh;
++	struct mn_info *minfo;
++
++	DEBUG_FUNC();
++
++	if (!haddr)
++		return NULL;
++
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		if (!ipv6_addr_cmp(&minfo->home_addr, haddr)) {
++			spin_unlock(&minfo->lock);
++			return minfo;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	return NULL;
++}
++
++/**
++ * mipv6_mninfo_get_by_ha - Lookup mn_info with Home Agent address
++ * @home_agent: Home Agent address
++ *
++ * Searches for a mn_info entry with @ha set to @home_agent.  You MUST
++ * hold @mn_info_lock when calling this function.  Returns pointer to
++ * mn_info entry or %NULL on failure.
++ **/
++struct mn_info *mipv6_mninfo_get_by_ha(struct in6_addr *home_agent)
++{
++	struct list_head *lh;
++	struct mn_info *minfo;
++
++	if (!home_agent)
++		return NULL;
++
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		if (!ipv6_addr_cmp(&minfo->ha, home_agent)) {
++			spin_unlock(&minfo->lock);
++			return minfo;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	return NULL;
++}
++
++/**
++ * mipv6_mninfo_get_by_id - Lookup mn_info with id
++ * @id: DHAAD identifier
++ *
++ * Searches for a mn_info entry with @dhaad_id set to @id.  You MUST
++ * hold @mn_info_lock when calling this function.  Returns pointer to
++ * mn_info entry or %NULL on failure.
++ **/
++struct mn_info *mipv6_mninfo_get_by_id(unsigned short id)
++{
++	struct list_head *lh;
++	struct mn_info *minfo = 0;
++
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		if (minfo->dhaad_id == id) {
++			spin_unlock(&minfo->lock);
++			return minfo;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	return NULL;
++}
++
++/** 
++ * mipv6_mninfo_add - Adds a new home info for MN
++ * @ifindex: Interface for home address
++ * @home_addr:  Home address of MN, must be set
++ * @plen: prefix length of the home address, must be set
++ * @isathome : home address at home
++ * @lifetime: lifetime of the home address, 0 is infinite
++ * @ha: home agent for the home address
++ * @ha_plen: prefix length of home agent's address, can be zero 
++ * @ha_lifetime: Lifetime of the home address, 0 is infinite
++ *
++ * The function adds a new home info entry for MN, allowing it to
++ * register the home address with the home agent.  Starts home
++ * registration process.  If @ha is %ADDRANY, DHAAD is performed to
++ * find a home agent.  Returns 0 on success, a negative value
++ * otherwise.  Caller MUST NOT hold @mn_info_lock or
++ * @addrconf_hash_lock.
++ **/
++void mipv6_mninfo_add(int ifindex, struct in6_addr *home_addr, int plen, 
++		      int isathome, unsigned long lifetime, struct in6_addr *ha, 
++		      int ha_plen, unsigned long ha_lifetime, int man_conf)
++{
++	struct mn_info *minfo;
++	struct in6_addr coa;
++
++	DEBUG_FUNC();
++
++	write_lock_bh(&mn_info_lock);
++	if ((minfo = mipv6_mninfo_get_by_home(home_addr)) != NULL){ 
++	      DEBUG(1, "MN info already exists");
++	      write_unlock_bh(&mn_info_lock);
++	      return;
++	}
++	minfo = kmalloc(sizeof(struct mn_info), GFP_ATOMIC);
++	if (!minfo) {
++	       write_unlock_bh(&mn_info_lock);
++	       return;
++	}
++	memset(minfo, 0, sizeof(struct mn_info));
++	spin_lock_init(&minfo->lock);
++
++	
++	ipv6_addr_copy(&minfo->home_addr, home_addr);
++
++	if (ha)
++		ipv6_addr_copy(&minfo->ha, ha);
++	if (ha_plen < 128 && ha_plen > 0)
++		minfo->home_plen = ha_plen; 
++	else minfo->home_plen = 64;
++
++	minfo->ifindex_user = ifindex; /* Ifindex for tunnel interface */
++	minfo->ifindex = ifindex; /* Interface on which home address is currently conf'd */
++	/* TODO: we should get home address lifetime from somewhere */
++	/* minfo->home_addr_expires = jiffies + lifetime * HZ; */
++
++	/* manual configuration flag cannot be unset by dynamic updates 
++	 *  from prefix advertisements
++	 */
++	if (!minfo->man_conf) minfo->man_conf = man_conf; 
++	minfo->is_at_home = isathome;
++
++	list_add(&minfo->list, &mn_info_list);
++	write_unlock_bh(&mn_info_lock);
++
++	if (mipv6_get_care_of_address(home_addr, &coa) == 0) 
++		init_home_registration(home_addr, &coa);
++}
++
++/**
++ * mipv6_mninfo_del - Delete home info for MN 
++ * @home_addr : Home address or prefix 
++ * @del_dyn_only : Delete only dynamically created home entries 
++ *
++ * Deletes every mn_info entry that matches the first plen bits of
++ * @home_addr.  Returns number of deleted entries on success and a
++ * negative value otherwise.  Caller MUST NOT hold @mn_info_lock.
++ **/
++int mipv6_mninfo_del(struct in6_addr *home_addr, int del_dyn_only)
++{
++	struct list_head *lh, *next;
++	struct mn_info *minfo;
++	int ret = -1;
++	if (!home_addr)
++		return -1;
++
++	write_lock(&mn_info_lock);
++
++	list_for_each_safe(lh, next, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		if (ipv6_addr_cmp(&minfo->home_addr, home_addr) == 0
++		    && ((!minfo->man_conf && del_dyn_only) || !del_dyn_only)){
++			list_del(&minfo->list);
++			kfree(minfo);
++			ret++;
++		}
++	}
++	write_unlock(&mn_info_lock);
++	return ret;
++}
++
++void mipv6_mn_set_home(int ifindex, struct in6_addr *homeaddr, int plen,
++		       struct in6_addr *homeagent, int ha_plen)
++{
++	mipv6_mninfo_add(ifindex, homeaddr, plen, 0, 0, 
++			 homeagent, ha_plen, 0, 1);
++}
++
++static int skip_dad(struct in6_addr *addr)
++{
++	struct mn_info *minfo;
++	int ret = 0;
++
++	if (addr == NULL) {
++		DEBUG(DBG_CRITICAL, "Null argument");
++		return 0;
++	}
++	read_lock_bh(&mn_info_lock);
++	if ((minfo = mipv6_mninfo_get_by_home(addr)) != NULL) {
++		if ((minfo->is_at_home != MN_NOT_AT_HOME) && (minfo->has_home_reg))
++			ret = 1;
++		DEBUG(DBG_INFO, "minfo->is_at_home = %d, minfo->has_home_reg = %d",
++		      minfo->is_at_home, minfo->has_home_reg);
++	}
++	read_unlock_bh(&mn_info_lock);
++	
++	return ret;
++}
++/**
++ * mipv6_mn_is_home_addr - Determines if addr is node's home address
++ * @addr: IPv6 address
++ *
++ * Returns 1 if addr is node's home address.  Otherwise returns zero.
++ **/
++int mipv6_mn_is_home_addr(struct in6_addr *addr)
++{
++	int ret = 0;
++
++	if (addr == NULL) {
++		DEBUG(DBG_CRITICAL, "Null argument");
++		return -1;
++	}
++	read_lock_bh(&mn_info_lock);
++	if (mipv6_mninfo_get_by_home(addr))
++		ret = 1;
++	read_unlock_bh(&mn_info_lock);
++
++	return (ret);
++}
++
++/** 
++ * mipv6_mn_is_at_home - determine if node is home for a home address
++ * @home_addr : home address of MN
++ *
++ * Returns 1 if home address in question is in the home network, 0
++ * otherwise.  Caller MUST NOT not hold @mn_info_lock.
++ **/ 
++int mipv6_mn_is_at_home(struct in6_addr *home_addr)
++{
++	struct mn_info *minfo;
++	int ret = 0;
++	read_lock_bh(&mn_info_lock);
++	if ((minfo = mipv6_mninfo_get_by_home(home_addr)) != NULL) {
++		spin_lock(&minfo->lock);
++		ret = (minfo->is_at_home == MN_AT_HOME);
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++	return ret;
++}	
++void mipv6_mn_set_home_reg(struct in6_addr *home_addr, int has_home_reg)
++{
++	struct mn_info *minfo;
++	read_lock_bh(&mn_info_lock);
++
++	if ((minfo = mipv6_mninfo_get_by_home(home_addr)) != NULL) {
++		spin_lock(&minfo->lock);
++		minfo->has_home_reg = has_home_reg;
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++}	
++
++static int mn_inet6addr_event(
++	struct notifier_block *nb, unsigned long event, void *ptr)
++{
++	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)ptr;
++
++	switch (event) {
++	case NETDEV_UP:
++		/* Is address a valid coa ?*/
++		if (!(ifp->flags & IFA_F_TENTATIVE))
++			mipv6_mdet_finalize_ho(&ifp->addr, 
++					       ifp->idev->dev->ifindex);
++		else if(skip_dad(&ifp->addr))
++			ifp->flags &= ~IFA_F_TENTATIVE;
++		break;
++	case NETDEV_DOWN:	
++#if 0
++		/* This is useless with manually configured home 
++		   addresses, which will not expire
++		*/
++		mipv6_mninfo_del(&ifp->addr, 0);
++#endif
++	  break;
++
++	}
++
++	return NOTIFY_DONE;
++}
++
++struct notifier_block mipv6_mn_inet6addr_notifier = {
++	mn_inet6addr_event,
++	NULL,
++	0 /* check if using zero is ok */
++};
++
++static void mipv6_get_saddr_hook(struct in6_addr *homeaddr)
++{
++	int found = 0, reiter = 0;
++	struct list_head *lh;
++	struct mn_info *minfo = NULL;
++	struct in6_addr coa;
++
++	read_lock_bh(&mn_info_lock);
++restart:
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		if ((ipv6_addr_scope(homeaddr) != ipv6_addr_scope(&minfo->home_addr)) 
++		    || ipv6_chk_addr(&minfo->home_addr, NULL) == 0)
++			continue; 
++
++		spin_lock(&minfo->lock);
++		if (minfo->is_at_home == MN_AT_HOME || minfo->has_home_reg) {
++			if ((mipv6_use_topol_corr_hoaddr && 
++			     minfo->is_at_home == MN_AT_HOME) || 
++			    (mipv6_use_preconfigured_hoaddr && 
++			     minfo->man_conf) ||
++			    (!(mipv6_use_preconfigured_hoaddr || 
++			       mipv6_use_topol_corr_hoaddr) || reiter)) {
++				spin_unlock(&minfo->lock);
++				ipv6_addr_copy(homeaddr, &minfo->home_addr);
++				found = 1;
++				break;
++			}
++		}
++		spin_unlock(&minfo->lock);
++	}
++	if (!found && !reiter) {
++		reiter = 1;
++		goto restart;
++	}
++
++	if (!found && minfo && 
++	    !mipv6_get_care_of_address(&minfo->home_addr, &coa)) {
++		ipv6_addr_copy(homeaddr, &coa); 
++	}
++	read_unlock_bh(&mn_info_lock);
++
++	DEBUG(DBG_DATADUMP, "Source address selection:  %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(homeaddr));
++	return;
++}
++
++static void mv_home_addr(void *arg)
++{
++	mm_segment_t oldfs;
++	int err = 0, new_if = 0;
++	struct list_head *lh, *next;
++	struct ifr_holder *ifrh;
++	LIST_HEAD(list);
++	
++	DEBUG(DBG_INFO, "mipv6 move home address task");
++
++	spin_lock_bh(&ifrh_lock);
++	list_splice_init(&ifrh_list, &list);
++	spin_unlock_bh(&ifrh_lock);
++	
++	oldfs = get_fs(); set_fs(KERNEL_DS);
++	list_for_each_safe(lh, next, &list) {
++		ifrh = list_entry(lh, struct ifr_holder, list);
++		if (ifrh->old_ifi) {
++			new_if = ifrh->ifr.ifr6_ifindex;
++			ifrh->ifr.ifr6_ifindex = ifrh->old_ifi;
++			err = addrconf_del_ifaddr(&ifrh->ifr); 
++			ifrh->ifr.ifr6_ifindex = new_if;
++			if (err < 0)
++				DEBUG(DBG_WARNING, "removal of home address %x:%x:%x:%x:%x:%x:%x:%x from" 
++				      " old interface %d failed with status %d", 
++				      NIPV6ADDR(&ifrh->ifr.ifr6_addr), ifrh->old_ifi, err);		
++		}
++		if(!err) {
++			err = addrconf_add_ifaddr(&ifrh->ifr);
++		}
++		if (ifrh->ho) {
++			DEBUG(DBG_INFO, "Calling mobile_node moved after moving home address to new if");
++			mipv6_mobile_node_moved(ifrh->ho);
++		}
++		list_del(&ifrh->list);
++		kfree(ifrh);
++	}
++	set_fs(oldfs);
++
++	if (err < 0)
++		DEBUG(DBG_WARNING, "adding of home address to a new interface %d failed %d", new_if, err);
++	else {
++		DEBUG(DBG_WARNING, "adding of home address to a new interface OK");
++	}
++}
++
++struct dhaad_halist {
++	struct list_head list;
++	struct in6_addr addr;
++	int retry;
++};
++
++/* clear all has from candidate list.  do this when a new dhaad reply
++ * is received. */
++int mipv6_mn_flush_ha_candidate(struct list_head *ha)
++{
++	struct list_head *p, *tmp;
++	struct dhaad_halist *e;
++
++	list_for_each_safe(p, tmp, ha) {
++		e = list_entry(p, struct dhaad_halist, list);
++		list_del(p);
++		kfree(e);
++		e = NULL;
++	}
++	return 0;
++}
++
++/* add new ha to candidates. only done when dhaad reply is received. */
++int mipv6_mn_add_ha_candidate(struct list_head *ha, struct in6_addr *addr)
++{
++	struct dhaad_halist *e;
++
++	e = kmalloc(sizeof(*e), GFP_ATOMIC);
++	memset(e, 0, sizeof(*e));
++	ipv6_addr_copy(&e->addr, addr);
++
++	list_add_tail(&e->list, ha);
++	return 0;
++}
++
++#define MAX_RETRIES_PER_HA 3
++
++/* get next ha candidate.  this is done when dhaad reply has been
++ * received and we want to register with the best available ha. */
++int mipv6_mn_get_ha_candidate(struct list_head *ha, struct in6_addr *addr)
++{
++	struct list_head *p;
++
++	list_for_each(p, ha) {
++		struct dhaad_halist *e;
++		e = list_entry(p, typeof(*e), list);
++		if (e->retry >= 0 && e->retry < MAX_RETRIES_PER_HA) {
++			ipv6_addr_copy(addr, &e->addr);
++			return 0;
++		}
++	}
++	return -1;
++}
++
++/* change candidate status.  if registration with ha fails, we
++ * increase retry for ha candidate.  if retry is >= 3 we set it to -1
++ * (failed), do get_ha_candidate() again */
++int mipv6_mn_try_ha_candidate(struct list_head *ha, struct in6_addr *addr)
++{
++	struct list_head *p;
++
++	list_for_each(p, ha) {
++		struct dhaad_halist *e;
++		e = list_entry(p, typeof(*e), list);
++		if (ipv6_addr_cmp(addr, &e->addr) == 0) {
++			if (e->retry >= MAX_RETRIES_PER_HA) e->retry = -1;
++			else if (e->retry >= 0) e->retry++;
++			return 0;
++		}
++	}
++	return -1;
++}
++
++/**
++ * mipv6_mn_get_bulifetime - Get lifetime for a binding update
++ * @home_addr: home address for BU 
++ * @coa: care-of address for BU
++ * @flags: flags used for BU 
++ *
++ * Returns maximum lifetime for BUs determined by the lifetime of
++ * care-of address and the lifetime of home address.
++ **/
++__u32 mipv6_mn_get_bulifetime(struct in6_addr *home_addr, struct in6_addr *coa,
++			      __u8 flags)
++{
++	struct inet6_ifaddr *ifp_hoa, *ifp_coa;
++	__u32 lifetime = (flags & MIPV6_BU_F_HOME ? 
++			  HA_BU_DEF_LIFETIME : CN_BU_DEF_LIFETIME); 
++
++	ifp_hoa = ipv6_get_ifaddr(home_addr, NULL);
++	if(!ifp_hoa) {
++		DEBUG(DBG_INFO, "home address missing");
++		return 0;
++	}
++	if (!(ifp_hoa->flags & IFA_F_PERMANENT)){
++		if (ifp_hoa->valid_lft)
++			lifetime = min_t(__u32, lifetime, ifp_hoa->valid_lft);
++		else
++			DEBUG(DBG_ERROR, "Zero lifetime for home address");
++	}
++	in6_ifa_put(ifp_hoa);
++
++	ifp_coa = ipv6_get_ifaddr(coa, NULL);
++	if (!ifp_coa) { 
++		DEBUG(DBG_INFO, "care-of address missing");
++		return 0;
++	}
++	if (!(ifp_coa->flags & IFA_F_PERMANENT)) {
++		if(ifp_coa->valid_lft)
++			lifetime = min_t(__u32, lifetime, ifp_coa->valid_lft);
++		else
++			DEBUG(DBG_ERROR, 
++			      "Zero lifetime for care-of address");
++	}
++	in6_ifa_put(ifp_coa);
++
++	DEBUG(DBG_INFO, "Lifetime for binding is %ld", lifetime);
++	return lifetime;
++}
++
++static int 
++mipv6_mn_tnl_rcv_send_bu_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	struct ipv6hdr *inner;
++	struct ipv6hdr *outer = skb->nh.ipv6h; 
++	struct mn_info *minfo = NULL;
++	__u32 lifetime;
++	__u8 user_flags = 0;
++
++	DEBUG_FUNC();
++
++	if (!is_mip6_tnl(t))
++		return IP6_TNL_ACCEPT;
++
++	if (!mip6node_cnf.accept_ret_rout) {
++		DEBUG(DBG_INFO, "Return routability administratively disabled" 
++		      " not doing route optimization");
++		return IP6_TNL_ACCEPT;
++	}
++	if (!pskb_may_pull(skb, skb->h.raw-skb->data+sizeof(*inner)))
++		return IP6_TNL_DROP;
++
++	inner = (struct ipv6hdr *)skb->h.raw;
++	
++	read_lock(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_home(&inner->daddr);
++
++	if (!minfo) {
++		DEBUG(DBG_WARNING, "MN info missing");
++		read_unlock(&mn_info_lock);
++		return IP6_TNL_ACCEPT;
++	}
++	DEBUG(DBG_DATADUMP, "MIPV6 MN: Received a tunneled IPv6 packet"
++	      " to %x:%x:%x:%x:%x:%x:%x:%x,"
++	      " from %x:%x:%x:%x:%x:%x:%x:%x with\n tunnel header"
++	      "daddr: %x:%x:%x:%x:%x:%x:%x:%x,"
++	      "saddr: %x:%x:%x:%x:%x:%x:%x:%x", 
++	       NIPV6ADDR(&inner->daddr), NIPV6ADDR(&inner->saddr),
++	       NIPV6ADDR(&outer->daddr), NIPV6ADDR(&outer->saddr));
++	
++	spin_lock(&minfo->lock);
++
++	/* We don't send bus in response to all tunneled packets */
++
++        if (!ipv6_addr_cmp(&minfo->ha, &inner->saddr)) {
++		spin_unlock(&minfo->lock);
++		read_unlock(&mn_info_lock);
++                DEBUG(DBG_ERROR, "HA BUG: Received a tunneled packet "
++		      "originally sent by home agent, not sending BU");
++		return IP6_TNL_ACCEPT;
++        }
++	spin_unlock(&minfo->lock);
++	read_unlock(&mn_info_lock);
++
++	DEBUG(DBG_DATADUMP, "Sending BU to correspondent node");
++
++	user_flags |= mip6node_cnf.bu_cn_ack ? MIPV6_BU_F_ACK : 0;
++
++	if (inner->nexthdr != IPPROTO_DSTOPTS && 
++	    inner->nexthdr != IPPROTO_MOBILITY) {
++		struct in6_addr coa;
++		/* Don't start RR when receiving ICMP error messages */
++		if (inner->nexthdr == IPPROTO_ICMPV6) {
++			int ptr = (u8*)(inner+1) - skb->data;
++			u8 type;
++
++			if (skb_copy_bits(skb,
++					  ptr+offsetof(struct icmp6hdr,
++						       icmp6_type),
++					  &type, 1)
++			    || !(type & ICMPV6_INFOMSG_MASK)) {
++				return IP6_TNL_ACCEPT;
++			}
++		}
++		lifetime = mipv6_mn_get_bulifetime(&inner->daddr,
++						   &outer->daddr, 0); 
++		if (lifetime && 
++		    !mipv6_get_care_of_address(&inner->daddr, &coa)) {
++			write_lock(&bul_lock);
++			mipv6_send_bu(&inner->daddr, &inner->saddr, &coa,
++				      INITIAL_BINDACK_TIMEOUT,
++				      MAX_BINDACK_TIMEOUT, 1, 
++				      user_flags,
++				      lifetime, NULL);
++			write_unlock(&bul_lock);
++		}
++	}
++	DEBUG(DBG_DATADUMP, "setting rcv_tunnel flag in skb");
++	skb->security |= MIPV6_RCV_TUNNEL;
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_mn_tnl_rcv_send_bu_ops = {
++	{NULL, NULL}, 
++	IP6_TNL_PRE_DECAP,
++	IP6_TNL_PRI_FIRST,
++	mipv6_mn_tnl_rcv_send_bu_hook
++};
++
++static int
++mipv6_mn_tnl_xmit_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_encapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_mn_tnl_xmit_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_ENCAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_mn_tnl_xmit_stats_hook
++};
++
++static int
++mipv6_mn_tnl_rcv_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();	
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_decapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_mn_tnl_rcv_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_DECAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_mn_tnl_rcv_stats_hook
++};
++
++static void mn_check_tunneled_packet(struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	/* If tunnel flag was set */
++	if (skb->security & MIPV6_RCV_TUNNEL) {
++		struct in6_addr coa; 
++		__u32 lifetime;
++		__u8 user_flags = 0;
++		int ptr = (u8*)(skb->nh.ipv6h+1) - skb->data;
++		int len = skb->len - ptr;
++		__u8 nexthdr = skb->nh.ipv6h->nexthdr;
++
++		if (len < 0)
++			return;
++
++		ptr = ipv6_skip_exthdr(skb, ptr, &nexthdr, len);
++		if (ptr < 0)
++			return;
++
++		if (!mip6node_cnf.accept_ret_rout) {
++			DEBUG(DBG_INFO, "Return routability administratively disabled");
++			return;
++		}
++		if (nexthdr == IPPROTO_MOBILITY)
++			return;
++	      
++		/* Don't start RR when receiving ICMP error messages */
++		if (nexthdr == IPPROTO_ICMPV6) {
++			u8 type;
++
++			if (skb_copy_bits(skb,
++					  ptr+offsetof(struct icmp6hdr,
++						       icmp6_type),
++					  &type, 1)
++			    || !(type & ICMPV6_INFOMSG_MASK)) {
++				return;
++			}
++		}
++		user_flags |= mip6node_cnf.bu_cn_ack ? MIPV6_BU_F_ACK : 0;
++		mipv6_get_care_of_address(&skb->nh.ipv6h->daddr, &coa);
++		lifetime = mipv6_mn_get_bulifetime(&skb->nh.ipv6h->daddr,
++ 							 &coa, 0); 
++
++		DEBUG(DBG_WARNING, "packet to address %x:%x:%x:%x:%x:%x:%x:%x"
++		      "was tunneled. Sending BU to CN" 
++		      "%x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(&skb->nh.ipv6h->daddr),
++		      NIPV6ADDR(&skb->nh.ipv6h->saddr)); 
++		/* This should work also with home address option */
++		
++		write_lock(&bul_lock);
++		mipv6_send_bu(&skb->nh.ipv6h->daddr, &skb->nh.ipv6h->saddr, 
++			      &coa, INITIAL_BINDACK_TIMEOUT,
++			      MAX_BINDACK_TIMEOUT, 1, user_flags,
++			      lifetime, NULL);
++		write_unlock(&bul_lock);
++	}
++}
++
++static int sched_mv_home_addr_task(struct in6_addr *haddr, int plen_new, 
++				   int newif, int oldif, struct handoff *ho)
++{
++	int alloc_size;
++	struct ifr_holder *ifrh;
++
++	alloc_size = sizeof(*ifrh) + (ho ? sizeof(*ho): 0);
++	if ((ifrh = kmalloc(alloc_size, GFP_ATOMIC)) == NULL) {
++		DEBUG(DBG_ERROR, "Out of memory");
++		return -1;
++	} 
++	if (ho) {
++		ifrh->ho = (struct handoff *)((struct ifr_holder *)(ifrh + 1));
++		memcpy(ifrh->ho, ho, sizeof(*ho));
++	} else 
++		ifrh->ho = NULL;
++
++	/* must queue task to avoid deadlock with rtnl */
++	ifrh->ifr.ifr6_ifindex = newif;
++	ifrh->ifr.ifr6_prefixlen = plen_new;
++	ipv6_addr_copy(&ifrh->ifr.ifr6_addr, haddr);
++	ifrh->old_ifi = oldif;
++	
++	spin_lock_bh(&ifrh_lock);
++	list_add_tail(&ifrh->list, &ifrh_list);
++	spin_unlock_bh(&ifrh_lock);
++
++	schedule_task(&mv_home_addr_task);
++
++	return 0;
++}
++
++static void send_ret_home_ns(struct in6_addr *ha_addr, 
++			     struct in6_addr *home_addr,
++			     int ifindex)
++{
++	struct in6_addr nil;
++	struct in6_addr mcaddr;
++	struct net_device *dev = dev_get_by_index(ifindex);
++	if (!dev)
++		return;
++	memset(&nil, 0, sizeof(nil));
++	addrconf_addr_solict_mult(home_addr, &mcaddr);
++	ndisc_send_ns(dev, NULL, home_addr, &mcaddr, &nil); 
++	dev_put(dev);
++}
++
++static inline int ha_is_reachable(int ifindex, struct in6_addr *ha)
++{
++	struct net_device *dev;
++	int reachable = 0;
++
++	dev = dev_get_by_index(ifindex);
++	if (dev) {
++		struct neighbour *neigh;
++		if ((neigh = ndisc_get_neigh(dev, ha)) != NULL) {
++			read_lock_bh(&neigh->lock);
++			if (neigh->nud_state&NUD_VALID)
++				reachable = 1;
++			read_unlock_bh(&neigh->lock);
++			neigh_release(neigh);
++		}
++		dev_put(dev);
++	}
++	return reachable;
++}
++
++static int mn_ha_handoff(struct handoff *ho)
++{
++	struct list_head *lh;
++	struct mn_info *minfo;
++	struct in6_addr *coa= ho->coa;
++	int wait_mv_home = 0; 
++
++	read_lock_bh(&mn_info_lock);
++	list_for_each(lh, &mn_info_list) {
++		__u8 has_home_reg;
++		int ifindex;
++		struct in6_addr ha;
++		__u8 athome;
++		__u32 lifetime;
++		struct mipv6_bul_entry *entry = NULL;
++		
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		has_home_reg = minfo->has_home_reg;
++		ifindex = minfo->ifindex;
++		ipv6_addr_copy(&ha, &minfo->ha);
++		
++		if (mipv6_prefix_compare(&ho->rtr_addr, &minfo->home_addr,
++					 ho->plen)) {
++			if (minfo->has_home_reg)
++				athome = minfo->is_at_home = MN_RETURNING_HOME;
++			else
++				athome = minfo->is_at_home = MN_AT_HOME;
++			coa = &minfo->home_addr;
++
++			spin_unlock(&minfo->lock);
++#if 0			
++			/* Cancel prefix solicitation, rtr is our HA */
++			mipv6_pfx_cancel_send(&ho->rtr_addr, ifindex);
++#endif			
++			minfo->ifindex = ho->ifindex;
++
++			if (minfo->has_home_reg && 
++			    !ha_is_reachable(ho->ifindex, &minfo->ha)) {
++				send_ret_home_ns(&minfo->ha,
++						 &minfo->home_addr, 
++						 ho->ifindex);
++				mipv6_mdet_set_curr_rtr_reachable(0);
++				wait_mv_home++;
++			}
++			if (ifindex != ho->ifindex){
++				wait_mv_home++;
++				DEBUG(DBG_INFO, 
++				      "Moving home address back to "
++				      "the home interface");
++				sched_mv_home_addr_task(&minfo->home_addr, 
++							128,
++							ho->ifindex, 
++							ifindex, ho);
++			}
++			if (!has_home_reg || wait_mv_home)
++				continue;
++			
++			lifetime = 0;
++
++		} else {
++			athome = minfo->is_at_home = MN_NOT_AT_HOME;
++			if (minfo->ifindex_user != minfo->ifindex) {
++				DEBUG(DBG_INFO, "Scheduling home address move to virtual interface");
++				sched_mv_home_addr_task(&minfo->home_addr, 
++							128,
++							minfo->ifindex_user, 
++							minfo->ifindex, ho); /* Is minfo->ifindex correct */
++				
++				wait_mv_home++;
++			}
++			minfo->ifindex = minfo->ifindex_user;
++			spin_unlock(&minfo->lock);
++			if (wait_mv_home)
++				continue;
++			if (!has_home_reg &&
++			    init_home_registration(&minfo->home_addr, 
++						   ho->coa)) {
++				continue;
++			}
++			lifetime = mipv6_mn_get_bulifetime(&minfo->home_addr, 
++							   ho->coa,
++							   MIPV6_BU_F_HOME);
++			
++		}
++		write_lock(&bul_lock);
++		if (!(entry = mipv6_bul_get(&ha, &minfo->home_addr)) ||
++		    !(entry->flags & MIPV6_BU_F_HOME)) {
++			DEBUG(DBG_ERROR, 
++			      "Unable to find home registration for "
++			      "home address: %x:%x:%x:%x:%x:%x:%x:%x!\n",
++			      NIPV6ADDR(&minfo->home_addr));
++			write_unlock(&bul_lock);
++			continue;
++		}
++		DEBUG(DBG_INFO, "Sending home de ? %d registration for "
++		      "home address: %x:%x:%x:%x:%x:%x:%x:%x\n" 
++		      "to home agent %x:%x:%x:%x:%x:%x:%x:%x, "
++		      "with lifetime %ld", 
++		      (athome != MN_NOT_AT_HOME),  
++		      NIPV6ADDR(&entry->home_addr), 
++		      NIPV6ADDR(&entry->cn_addr), lifetime);
++		mipv6_send_bu(&entry->home_addr, &entry->cn_addr, 
++			      coa, INITIAL_BINDACK_TIMEOUT, 
++			      MAX_BINDACK_TIMEOUT, 1, entry->flags, 
++			      lifetime, NULL);
++		write_unlock(&bul_lock);
++
++	}
++	read_unlock_bh(&mn_info_lock);
++	return wait_mv_home;
++}
++/**
++ * mn_cn_handoff - called for every bul entry to send BU to CN
++ * @rawentry: bul entry
++ * @args: handoff event
++ * @sortkey:
++ *
++ * Since MN can have many home addresses and home networks, every BUL
++ * entry needs to be checked
++ **/
++int mn_cn_handoff(void *rawentry, void *args, unsigned long *sortkey)
++{
++	struct mipv6_bul_entry *entry = (struct mipv6_bul_entry *)rawentry;
++	struct in6_addr *coa = (struct in6_addr *)args;
++
++	DEBUG_FUNC();
++
++	/* Home registrations already handled by mn_ha_handoff */
++	if (entry->flags & MIPV6_BU_F_HOME)
++		return ITERATOR_CONT;
++
++	/* BUL is locked by mipv6_mobile_node_moved which calls us 
++	   through mipv6_bul_iterate */
++
++	if (mipv6_prefix_compare(coa, 
++				 &entry->home_addr,
++				 64)) {
++		mipv6_send_bu(&entry->home_addr, &entry->cn_addr, 
++			      &entry->home_addr, INITIAL_BINDACK_TIMEOUT, 
++			      MAX_BINDACK_TIMEOUT, 1, entry->flags, 0, 
++			      NULL);
++	} else {
++		u32 lifetime = mipv6_mn_get_bulifetime(&entry->home_addr, 
++						       coa,
++						       entry->flags);
++		mipv6_send_bu(&entry->home_addr, &entry->cn_addr,
++                              coa, INITIAL_BINDACK_TIMEOUT,
++			      MAX_BINDACK_TIMEOUT, 1, entry->flags,
++			      lifetime, NULL);
++	}
++	return ITERATOR_CONT;
++}
++
++
++int mn_bul_invalidate(void *rawentry, void *args, unsigned long *sortkey)
++{
++	struct mipv6_bul_entry *bul = (struct mipv6_bul_entry *)rawentry;
++	struct bul_inval_args *arg = (struct bul_inval_args *)args;
++
++	DEBUG_FUNC();
++
++	if (!ipv6_addr_cmp(arg->cn, &bul->cn_addr) &&
++	    (!ipv6_addr_cmp(arg->mn, &bul->home_addr) ||
++	     !ipv6_addr_cmp(arg->mn, &bul->coa))) {
++		if (arg->all_rr_states || !bul->rr ||
++		    (bul->rr->rr_state != RR_INIT && 
++		     bul->rr->rr_state != RR_DONE)) {
++			bul->state = ACK_ERROR;
++			bul->callback = bul_entry_expired;
++			bul->callback_time = jiffies +
++				DUMB_CN_BU_LIFETIME * HZ;
++			bul->expire = bul->callback_time;
++			DEBUG(DBG_INFO, "BUL entry set to ACK_ERROR");
++			mipv6_bul_reschedule(bul);
++		}
++	}
++	return ITERATOR_CONT;
++}
++/**
++ * init_home_registration - start Home Registration process
++ * @home_addr: home address
++ * @coa: care-of address
++ *
++ * Checks whether we have a Home Agent address for this home address.
++ * If not starts Dynamic Home Agent Address Discovery.  Otherwise
++ * tries to register with home agent if not already registered.
++ * Returns 1, if home registration process is started and 0 otherwise
++ **/
++int init_home_registration(struct in6_addr *home_addr, struct in6_addr *coa)
++{
++	struct mn_info *hinfo;
++	struct in6_addr ha;
++	__u8 man_conf;
++	int ifindex;
++	__u32 lifetime;
++	__u8 user_flags = 0, flags;
++
++	DEBUG_FUNC();
++
++	read_lock_bh(&mn_info_lock);
++        if ((hinfo = mipv6_mninfo_get_by_home(home_addr)) == NULL) {
++                DEBUG(DBG_ERROR, "No mn_info found for address: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(home_addr));
++		read_unlock_bh(&mn_info_lock);
++                return -ENOENT;
++        }
++	spin_lock(&hinfo->lock);
++	if (mipv6_prefix_compare(&hinfo->home_addr, coa, hinfo->home_plen)) { 
++		spin_unlock(&hinfo->lock);
++		read_unlock_bh(&mn_info_lock);
++		DEBUG(DBG_INFO, "Adding home address, MN at home");
++		return 1;
++	}
++        if (ipv6_addr_any(&hinfo->ha)) {
++                int dhaad_id = mipv6_get_dhaad_id();
++                hinfo->dhaad_id = dhaad_id;
++		spin_unlock(&hinfo->lock);
++                mipv6_icmpv6_send_dhaad_req(home_addr, hinfo->home_plen, dhaad_id);
++		read_unlock_bh(&mn_info_lock);
++                DEBUG(DBG_INFO,
++		      "Home Agent address not set, initiating DHAAD");
++                return 1;
++        }
++        ipv6_addr_copy(&ha, &hinfo->ha);
++        man_conf = hinfo->man_conf;
++        ifindex = hinfo->ifindex;
++	spin_unlock(&hinfo->lock);
++	read_unlock_bh(&mn_info_lock);
++#if 0	
++	if (man_conf)
++		mipv6_pfx_add_ha(&ha, coa, ifindex);
++#endif	
++	if (mipv6_bul_exists(&ha, home_addr)) {
++		DEBUG(DBG_INFO, "BU already sent to HA");
++		return 0;
++	}
++	/* user flags received through sysctl */
++	user_flags |= mip6node_cnf.bu_lladdr ? MIPV6_BU_F_LLADDR : 0;
++	user_flags |= mip6node_cnf.bu_keymgm ? MIPV6_BU_F_KEYMGM : 0;
++
++	flags = MIPV6_BU_F_HOME | MIPV6_BU_F_ACK | user_flags;
++
++	lifetime = mipv6_mn_get_bulifetime(home_addr, coa, flags);
++
++	DEBUG(DBG_INFO, "Sending initial home registration for "
++	      "home address: %x:%x:%x:%x:%x:%x:%x:%x\n" 
++	      "to home agent %x:%x:%x:%x:%x:%x:%x:%x, "
++	      "with lifetime %ld, prefixlength %d",   
++	      NIPV6ADDR(home_addr), NIPV6ADDR(&ha), lifetime, 0);
++
++	write_lock_bh(&bul_lock);
++	mipv6_send_bu(home_addr, &ha, coa, INITIAL_BINDACK_DAD_TIMEOUT,
++		      MAX_BINDACK_TIMEOUT, 1, flags, lifetime, NULL);
++	write_unlock_bh(&bul_lock);
++
++	return 1;
++}
++
++/**
++ * mipv6_mobile_node_moved - Send BUs to all HAs and CNs
++ * @ho: handoff structure contains the new and previous routers
++ *
++ * Event for handoff.  Sends BUs everyone on Binding Update List.
++ **/
++int mipv6_mobile_node_moved(struct handoff *ho)
++{
++#if 0
++	int bu_to_prev_router = 1;
++#endif
++	int dummy;
++
++	DEBUG_FUNC();
++
++	ma_ctl_upd_iface(ho->ifindex, 
++			 MA_IFACE_CURRENT | MA_IFACE_HAS_ROUTER, &dummy);
++
++	/* First send BU to HA, then to all other nodes that are on BU list */
++	if (mn_ha_handoff(ho) != 0)
++		return 0; /* Wait for move home address task */
++#if 0	 
++	/* Add current care-of address to mn_info list, if current router acts 
++	   as a HA.*/ 
++
++	if (ho->home_address && bu_to_prev_router) 
++		mipv6_mninfo_add(ho->coa, ho->plen, 
++				 MN_AT_HOME, 0, &ho->rtr_addr, 
++				 ho->plen, ROUTER_BU_DEF_LIFETIME,
++				 0);
++				  
++#endif
++	return 0;		
++}
++
++/**
++ * mipv6_mn_send_home_na - send NA when returning home
++ * @haddr: home address to advertise
++ *
++ * After returning home, MN must advertise all its valid addresses in
++ * home link to all nodes.
++ **/
++void mipv6_mn_send_home_na(struct in6_addr *haddr)
++{
++	struct net_device *dev = NULL;
++	struct in6_addr mc_allnodes;
++	struct mn_info *hinfo = NULL;
++ 
++	read_lock(&mn_info_lock);
++	hinfo = mipv6_mninfo_get_by_home(haddr);
++	if (!hinfo) {
++		read_unlock(&mn_info_lock);
++		return;
++	}
++	spin_lock(&hinfo->lock);
++	hinfo->is_at_home = MN_AT_HOME;
++	dev = dev_get_by_index(hinfo->ifindex);
++	spin_unlock(&hinfo->lock);
++	read_unlock(&mn_info_lock);
++	if (dev == NULL) {
++		DEBUG(DBG_ERROR, "Send home_na: device not found.");
++		return;
++	}
++	
++	ipv6_addr_all_nodes(&mc_allnodes);
++	ndisc_send_na(dev, NULL, &mc_allnodes, haddr, 0, 0, 1, 1);
++	dev_put(dev);
++}
++
++static int mn_use_hao(struct in6_addr *daddr, struct in6_addr *saddr)
++{
++	struct mipv6_bul_entry *entry;
++	struct mn_info *minfo = NULL;
++	int add_ha = 0;
++
++	read_lock_bh(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_home(saddr);
++	if (minfo && minfo->is_at_home != MN_AT_HOME) {
++		read_lock_bh(&bul_lock);
++		if ((entry = mipv6_bul_get(daddr, saddr)) == NULL) {
++			read_unlock_bh(&bul_lock);
++			read_unlock_bh(&mn_info_lock);
++			return add_ha;
++		}
++		add_ha = (entry->state != ACK_ERROR &&
++			  (!entry->rr || entry->rr->rr_state == RR_DONE || 
++			   entry->flags & MIPV6_BU_F_HOME));
++		read_unlock_bh(&bul_lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++	return add_ha;
++}
++
++static int 
++mn_dev_event(struct notifier_block *nb, unsigned long event, void *ptr)
++{
++	struct net_device *dev = ptr;
++	struct list_head *lh;
++	struct mn_info *minfo;
++	int newif = 0;
++
++	/* here are probably the events we need to worry about */
++	switch (event) {
++	case NETDEV_UP:
++		DEBUG(DBG_DATADUMP, "New netdevice %s registered.", dev->name);
++		if (dev->type != ARPHRD_LOOPBACK && !dev_is_mip6_tnl(dev)) 
++			ma_ctl_add_iface(dev->ifindex);
++			
++		break;
++	case NETDEV_GOING_DOWN:
++		DEBUG(DBG_DATADUMP, "Netdevice %s disappeared.", dev->name);
++		/* 
++		 * Go through mn_info list and move all home addresses on the
++		 * netdev going down to a new device. This will make it 
++                 * practically impossible for the home address to return home,
++		 * but allow MN to retain its connections using the address.
++		 */
++
++		read_lock_bh(&mn_info_lock);
++		list_for_each(lh, &mn_info_list) {
++			minfo = list_entry(lh, struct mn_info, list);
++			spin_lock(&minfo->lock);
++			if (minfo->ifindex == dev->ifindex) {
++				if (sched_mv_home_addr_task(&minfo->home_addr, 128, 
++							    minfo->ifindex_user, 
++							    0, NULL) < 0) {
++					minfo->ifindex = 0;
++					spin_unlock(&minfo->lock);
++					read_unlock_bh(&mn_info_lock);
++					return NOTIFY_DONE;
++				} else { 
++					minfo->ifindex = minfo->ifindex_user;
++					if (minfo->is_at_home) {
++						minfo->is_at_home = 0;
++
++					}
++					newif = minfo->ifindex_user;
++				}
++			}
++			spin_unlock(&minfo->lock);				
++		}
++		
++		read_unlock_bh(&mn_info_lock);
++	}
++	ma_ctl_upd_iface(dev->ifindex, MA_IFACE_NOT_PRESENT, &newif);
++	mipv6_mdet_del_if(dev->ifindex);
++
++	return NOTIFY_DONE;
++}
++
++struct notifier_block mipv6_mn_dev_notifier = {
++	mn_dev_event,
++	NULL,
++	0 /* check if using zero is ok */
++};
++
++static void deprecate_addr(struct mn_info *minfo)
++{
++	/*
++	 * Lookup address from IPv6 address list and set deprecated flag
++	 */
++	
++}
++
++/*
++ * Required because we can only modify addresses after the packet is
++ * constructed.  We otherwise mess with higher level protocol
++ * pseudoheaders. With strict protocol layering life would be SO much
++ * easier!  
++ */
++static unsigned int modify_xmit_addrs(unsigned int hooknum,
++				      struct sk_buff **pskb,
++				      const struct net_device *in,
++				      const struct net_device *out,
++				      int (*okfn) (struct sk_buff *))
++{
++	struct sk_buff *skb = *pskb;
++
++	DEBUG_FUNC();
++	
++	if (skb) {
++		struct ipv6hdr *hdr = skb->nh.ipv6h;
++		struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
++		struct mipv6_bul_entry *bule;
++		struct in6_addr *daddr;
++
++		if (!ipv6_addr_any(&opt->hoa))
++			daddr = &opt->hoa;
++		else
++			daddr = &hdr->daddr;
++
++		/* We don't consult bul when sending a BU to avoid deadlock, since
++		 * BUL is already locked. 
++		 */
++		
++
++		if (opt->mipv6_flags & MIPV6_SND_HAO && 
++		    !(opt->mipv6_flags & MIPV6_SND_BU)) {
++			write_lock(&bul_lock);
++			bule = mipv6_bul_get(daddr, &hdr->saddr);
++			if (!bule) {
++				write_unlock(&bul_lock);
++				return NF_ACCEPT;
++			}
++			if (!bule->rr || bule->rr->rr_state == RR_DONE || 
++			    bule->flags & MIPV6_BU_F_HOME) {
++				DEBUG(DBG_DATADUMP, 
++				      "Replace source address with CoA and reroute");
++				ipv6_addr_copy(&hdr->saddr, &bule->coa);
++				skb->nfcache |= NFC_ALTERED;
++			}
++			write_unlock(&bul_lock);
++		} else if (opt->mipv6_flags & MIPV6_SND_HAO) {
++			mipv6_get_care_of_address(&hdr->saddr, &hdr->saddr);
++			skb->nfcache |= NFC_ALTERED;
++		}
++	}
++	return NF_ACCEPT;
++}
++
++/* We set a netfilter hook so that we can modify outgoing packet's
++ * source addresses 
++ */
++struct nf_hook_ops addr_modify_hook_ops = {
++	{NULL, NULL},		/* List head, no predecessor, no successor */
++	modify_xmit_addrs,
++	PF_INET6,
++	NF_IP6_LOCAL_OUT,
++	NF_IP6_PRI_FIRST       	/* Should be of EXTREMELY high priority since we
++				 * do not want to mess with IPSec (possibly
++				 * implemented as packet filter)
++				 */
++};
++
++#define MN_INFO_LEN 77
++
++static int mn_proc_info(char *buffer, char **start, off_t offset,
++			int length)
++{
++	struct list_head *p;
++	struct mn_info *minfo;
++	int len = 0, skip = 0;
++
++	DEBUG_FUNC();
++
++	read_lock_bh(&mn_info_lock);
++	list_for_each(p, &mn_info_list) {
++		if (len < offset / MN_INFO_LEN) {
++			skip++;
++			continue;
++		}
++		if (len >= length)
++			break;
++		minfo = list_entry(p, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		len += sprintf(buffer + len, "%02d %08x%08x%08x%08x %02x "
++			       "%08x%08x%08x%08x %d %d\n",
++			       minfo->ifindex,
++			       ntohl(minfo->home_addr.s6_addr32[0]),
++			       ntohl(minfo->home_addr.s6_addr32[1]),
++			       ntohl(minfo->home_addr.s6_addr32[2]),
++			       ntohl(minfo->home_addr.s6_addr32[3]),
++			       minfo->home_plen,
++			       ntohl(minfo->ha.s6_addr32[0]),
++			       ntohl(minfo->ha.s6_addr32[1]),
++			       ntohl(minfo->ha.s6_addr32[2]),
++			       ntohl(minfo->ha.s6_addr32[3]),
++			       minfo->is_at_home, minfo->has_home_reg);
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % MN_INFO_LEN;
++
++	len -= offset % MN_INFO_LEN;
++
++	if (len > length)
++		len = length;
++	if (len < 0)
++		len = 0;
++	
++	return len;
++}
++
++int mipv6_mn_ha_nd_update(struct net_device *dev,
++			  struct in6_addr *ha, u8 *lladdr)
++{
++	int valid = 0;
++	struct neighbour *neigh;
++	if ((neigh = ndisc_get_neigh(dev, ha))) {
++		read_lock(&neigh->lock);
++		valid = neigh->nud_state & NUD_VALID;
++		read_unlock(&neigh->lock);
++		if (!valid && lladdr)
++			neigh_update(neigh, lladdr, NUD_REACHABLE, 0, 1);
++		neigh_release(neigh);
++	}
++	return valid;
++}
++
++int mipv6_mn_ha_probe(struct inet6_ifaddr *ifp, u8 *lladdr)
++{
++	struct mn_info *minfo;
++
++	if (!(minfo = mipv6_mninfo_get_by_home(&ifp->addr)) ||
++	    ipv6_addr_any(&minfo->ha))
++		return 0;
++
++	if (mipv6_mn_ha_nd_update(ifp->idev->dev, &minfo->ha, lladdr))
++		mipv6_mdet_retrigger_ho();
++	return 1;
++}
++
++int __init mipv6_mn_init(void)
++{
++	struct net_device *dev;
++
++	DEBUG_FUNC();
++
++	if (mipv6_add_tnl_to_ha())
++		return -ENODEV;
++
++	mipv6_bul_init(MIPV6_BUL_SIZE);
++	mip6_fn.mn_use_hao = mn_use_hao;
++	mip6_fn.mn_check_tunneled_packet = mn_check_tunneled_packet;
++	INIT_TQUEUE(&mv_home_addr_task, mv_home_addr, NULL);
++
++	ma_ctl_init();
++	for (dev = dev_base; dev; dev = dev->next) {
++		if (dev->flags & IFF_UP && 
++		    dev->type != ARPHRD_LOOPBACK && !dev_is_mip6_tnl(dev)) {
++			ma_ctl_add_iface(dev->ifindex);
++		}
++	} 
++	DEBUG(DBG_INFO, "Multiaccess support initialized");
++
++	register_netdevice_notifier(&mipv6_mn_dev_notifier);
++	register_inet6addr_notifier(&mipv6_mn_inet6addr_notifier);
++
++	ip6ip6_tnl_register_hook(&mipv6_mn_tnl_rcv_send_bu_ops);
++	ip6ip6_tnl_register_hook(&mipv6_mn_tnl_xmit_stats_ops);
++	ip6ip6_tnl_register_hook(&mipv6_mn_tnl_rcv_stats_ops);
++
++	MIPV6_SETCALL(mipv6_set_home, mipv6_mn_set_home);
++
++	mipv6_initialize_mdetect();
++
++	/* COA to home transformation hook */
++	MIPV6_SETCALL(mipv6_get_home_address, mipv6_get_saddr_hook);
++	MIPV6_SETCALL(mipv6_mn_ha_probe, mipv6_mn_ha_probe);
++	MIPV6_SETCALL(mipv6_is_home_addr, mipv6_mn_is_home_addr);
++	proc_net_create("mip6_mninfo", 0, mn_proc_info);
++	/* Set packet modification hook (source addresses) */
++	nf_register_hook(&addr_modify_hook_ops);
++
++	return 0;
++}
++
++void __exit mipv6_mn_exit(void)
++{
++	struct list_head *lh, *tmp;
++	struct mn_info *minfo;
++	DEBUG_FUNC();
++	
++	mip6_fn.mn_use_hao = NULL;
++	mip6_fn.mn_check_tunneled_packet = NULL;
++	
++	MIPV6_RESETCALL(mipv6_set_home);
++	MIPV6_RESETCALL(mipv6_get_home_address);
++	MIPV6_RESETCALL(mipv6_mn_ha_probe);
++	MIPV6_RESETCALL(mipv6_is_home_addr);
++	nf_unregister_hook(&addr_modify_hook_ops);
++	proc_net_remove("mip6_mninfo");
++	mipv6_shutdown_mdetect();
++	ip6ip6_tnl_unregister_hook(&mipv6_mn_tnl_rcv_stats_ops);
++	ip6ip6_tnl_unregister_hook(&mipv6_mn_tnl_xmit_stats_ops);
++	ip6ip6_tnl_unregister_hook(&mipv6_mn_tnl_rcv_send_bu_ops);
++	ma_ctl_clean();
++
++	unregister_inet6addr_notifier(&mipv6_mn_inet6addr_notifier);
++	unregister_netdevice_notifier(&mipv6_mn_dev_notifier);
++	write_lock_bh(&mn_info_lock);
++
++	list_for_each_safe(lh, tmp, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		if (minfo->is_at_home == MN_NOT_AT_HOME) 
++			deprecate_addr(minfo);
++		list_del(&minfo->list);
++		kfree(minfo);
++	}
++	write_unlock_bh(&mn_info_lock);
++	mipv6_bul_exit();
++	flush_scheduled_tasks();
++	mipv6_del_tnl_to_ha();
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mn.h linux-2.4.25/net/ipv6/mobile_ip6/mn.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mn.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mn.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,96 @@
++/*
++ *      MIPL Mobile IPv6 Mobile Node header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MN_H
++#define _MN_H
++
++#include <linux/in6.h>
++
++/* constants for sending of BUs*/
++#define HA_BU_DEF_LIFETIME 10000
++#define CN_BU_DEF_LIFETIME 420 /* Max lifetime for RR bindings from RFC 3775 */
++#define DUMB_CN_BU_LIFETIME 600 /* BUL entry lifetime in case of dumb CN */
++#define ROUTER_BU_DEF_LIFETIME 30 /* For packet forwarding from previous coa */
++#define ERROR_DEF_LIFETIME DUMB_CN_BU_LIFETIME
++
++extern rwlock_t mn_info_lock;
++
++#define MN_NOT_AT_HOME 0
++#define MN_RETURNING_HOME 1
++#define MN_AT_HOME 2
++
++/*
++ * Mobile Node information record
++ */
++struct mn_info {
++	struct in6_addr home_addr;
++	struct in6_addr ha;
++	__u8 home_plen;
++	__u8 is_at_home;
++	__u8 has_home_reg;
++	__u8 man_conf;
++	int ifindex;
++	int ifindex_user; 
++	unsigned long home_addr_expires;
++	unsigned short dhaad_id;
++	struct list_head list;
++	spinlock_t lock;
++};
++
++/* prototypes for interface functions */
++int mipv6_mn_init(void);
++void mipv6_mn_exit(void);
++
++struct handoff;
++
++/* Interface to movement detection */
++int mipv6_mobile_node_moved(struct handoff *ho);
++
++void mipv6_mn_send_home_na(struct in6_addr *haddr);
++/* Init home reg. with coa */
++int init_home_registration(struct in6_addr *home_addr, struct in6_addr *coa);
++
++/* mn_info functions that require locking by caller */
++struct mn_info *mipv6_mninfo_get_by_home(struct in6_addr *haddr);
++
++struct mn_info *mipv6_mninfo_get_by_ha(struct in6_addr *home_agent);
++
++struct mn_info *mipv6_mninfo_get_by_id(unsigned short id);
++
++/* "safe" mn_info functions */
++void mipv6_mninfo_add(int ifindex, struct in6_addr *home_addr, int plen, 
++		      int isathome, unsigned long lifetime, struct in6_addr *ha, 
++		      int ha_plen, unsigned long ha_lifetime, int man_conf);
++
++int mipv6_mninfo_del(struct in6_addr *home_addr, int del_dyn_only);
++
++void mipv6_mn_set_home_reg(struct in6_addr *home_addr, int has_home_reg);
++
++int mipv6_mn_is_at_home(struct in6_addr *addr);
++
++int mipv6_mn_is_home_addr(struct in6_addr *addr);
++
++__u32 mipv6_mn_get_bulifetime(struct in6_addr *home_addr, 
++			      struct in6_addr *coa, __u8 flags);
++int mn_cn_handoff(void *rawentry, void *args, unsigned long *sortkey);
++
++int mipv6_mn_ha_nd_update(struct net_device *dev,
++			  struct in6_addr *ha, u8 *lladdr);
++
++struct bul_inval_args {
++	int all_rr_states;
++	struct in6_addr *cn;
++	struct in6_addr *mn;
++};
++
++int mn_bul_invalidate(void *rawentry, void *args, unsigned long *sortkey);
++
++#endif /* _MN_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mobhdr.h linux-2.4.25/net/ipv6/mobile_ip6/mobhdr.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mobhdr.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mobhdr.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,101 @@
++/*
++ *      MIPL Mobile IPv6 Mobility Header send and receive
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MOBHDR_H
++#define _MOBHDR_H
++
++#include <net/mipv6.h>
++
++/* RR states for mipv6_send_bu() */
++#define RR_INIT			0x00
++#define RR_WAITH		0x01
++#define RR_WAITC		0x02
++#define RR_WAITHC		0x13
++#define RR_DONE			0x10
++
++#define MH_UNKNOWN_CN 1
++#define MH_AUTH_FAILED 2
++#define MH_SEQUENCE_MISMATCH 3
++
++struct mipv6_bul_entry;
++struct sk_buff;
++
++int mipv6_mh_common_init(void);
++void mipv6_mh_common_exit(void);
++int mipv6_mh_mn_init(void);
++void mipv6_mh_mn_exit(void);
++
++struct mipv6_mh_opt {
++	struct mipv6_mo_alt_coa		*alt_coa;
++	struct mipv6_mo_nonce_indices	*nonce_indices;
++	struct mipv6_mo_bauth_data	*auth_data;
++	struct mipv6_mo_br_advice	*br_advice;
++	int freelen;
++	int totlen;
++	u8 *next_free;
++	u8 data[0];
++};
++
++struct mobopt {
++	struct mipv6_mo_alt_coa		*alt_coa;
++	struct mipv6_mo_nonce_indices	*nonce_indices;
++	struct mipv6_mo_bauth_data	*auth_data;
++	struct mipv6_mo_br_advice	*br_advice;
++};
++
++struct mipv6_mh_opt *alloc_mh_opts(int totlen);
++int append_mh_opt(struct mipv6_mh_opt *ops, u8 type, u8 len, void *data);
++int parse_mo_tlv(void *mos, int len, struct mobopt *opts);
++int mipv6_add_pad(u8 *data, int n);
++
++struct mipv6_auth_parm {
++	struct in6_addr *coa;
++	struct in6_addr *cn_addr;
++	__u8 *k_bu;
++};
++
++int send_mh(struct in6_addr *daddr, struct in6_addr *saddr, 
++	    u8 msg_type, u8 msg_len, u8 *msg,
++	    struct in6_addr *hao_addr, struct in6_addr *rth_addr,
++	    struct mipv6_mh_opt *ops, struct mipv6_auth_parm *parm);
++
++int mipv6_mh_register(int type, int (*func)(struct sk_buff *,
++	struct in6_addr *, struct in6_addr *, 
++	struct in6_addr *, struct in6_addr *, struct mipv6_mh *));
++
++void mipv6_mh_unregister(int type);
++
++int mipv6_send_brr(struct in6_addr *saddr, struct in6_addr *daddr,
++		   struct mipv6_mh_opt *ops);
++
++int mipv6_send_bu(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *coa, __u32 initdelay, 
++		  __u32 maxackdelay, __u8 exp, __u8 flags,
++		  __u32 lifetime, struct mipv6_mh_opt *ops);
++
++int mipv6_send_be(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *home, __u8 status);
++
++int mipv6_send_ba(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *auth_coa, struct in6_addr *rep_coa,
++		  u8 status, u16 sequence, u32 lifetime, u8 *k_bu);
++
++/* Binding Authentication Data Option routines */
++#define MAX_HASH_LENGTH 20
++#define MIPV6_RR_MAC_LENGTH 12
++
++int mipv6_auth_build(struct in6_addr *cn_addr, struct in6_addr *coa, 
++		     __u8 *opt, __u8 *aud_data, __u8 *k_bu);
++
++int mipv6_auth_check(struct in6_addr *cn_addr, struct in6_addr *coa, 
++		     __u8 *opt, __u8 optlen, struct mipv6_mo_bauth_data *aud, 
++		     __u8 *k_bu);
++#endif /* _MOBHDR_H */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mobhdr_common.c linux-2.4.25/net/ipv6/mobile_ip6/mobhdr_common.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mobhdr_common.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mobhdr_common.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,1210 @@
++/*
++ *	Mobile IPv6 Mobility Header Common Functions
++ *
++ *	Authors:
++ *	Antti Tuominen <ajtuomin@tml.hut.fi>
++ *
++ *      $Id: s.mh_recv.c 1.159 02/10/16 15:01:29+03:00 antti@traci.mipl.mediapoli.com $
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/autoconf.h>
++#include <linux/types.h>
++#include <linux/in6.h>
++#include <linux/skbuff.h>
++#include <linux/ipsec.h>
++#include <linux/init.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++#include <net/checksum.h>
++#include <net/protocol.h>
++
++#include "stats.h"
++#include "debug.h"
++#include "mobhdr.h"
++#include "bcache.h"
++
++#include "rr_crypto.h"
++#include "exthdrs.h"
++#include "config.h"
++
++#define MIPV6_MH_MAX MIPV6_MH_BE
++struct mh_proto {
++	int	(*func) (struct sk_buff *,
++			 struct in6_addr *, struct in6_addr *, 
++			 struct in6_addr *, struct in6_addr *, 
++			 struct mipv6_mh *);
++};
++
++static struct mh_proto mh_rcv[MIPV6_MH_MAX];
++
++int mipv6_mh_register(int type, int (*func)(struct sk_buff *,
++	struct in6_addr *, struct in6_addr *, 
++	struct in6_addr *, struct in6_addr *, struct mipv6_mh *))
++{
++	if (mh_rcv[type].func != NULL)
++		return -1;
++
++	mh_rcv[type].func = func;
++
++	return 0;
++}
++
++void mipv6_mh_unregister(int type)
++{
++	if (type < 0 || type > MIPV6_MH_MAX)
++		return;
++
++	mh_rcv[type].func = NULL;
++}
++
++struct socket *mipv6_mh_socket = NULL;
++
++/* TODO: Fix fragmentation */
++static int dstopts_getfrag(
++	const void *data, struct in6_addr *addr,
++	char *buff, unsigned int offset, unsigned int len)
++{
++	memcpy(buff, data + offset, len);
++	return 0;
++}
++
++struct mipv6_mh_opt *alloc_mh_opts(int totlen)
++{
++	struct mipv6_mh_opt *ops;
++
++	ops = kmalloc(sizeof(*ops) + totlen, GFP_ATOMIC);
++	if (ops == NULL)
++		return NULL;
++
++	memset(ops, 0, sizeof(*ops));
++	ops->next_free = ops->data;
++	ops->freelen = totlen;
++
++	return ops;
++}
++
++int append_mh_opt(struct mipv6_mh_opt *ops, u8 type, u8 len, void *data)
++{
++	struct mipv6_mo *mo;
++
++	if (ops->next_free == NULL) {
++		DEBUG(DBG_ERROR, "No free room for option");
++		return -ENOMEM;
++	}
++	if (ops->freelen < len + 2) {
++		DEBUG(DBG_ERROR, "No free room for option");
++		return -ENOMEM;
++	}
++	else {
++		ops->freelen -= (len + 2);
++		ops->totlen += (len + 2);
++	}
++
++	mo = (struct mipv6_mo *)ops->next_free;
++	mo->type = type;
++	mo->length = len;
++
++	switch (type) {
++	case MIPV6_OPT_ALTERNATE_COA:
++		ops->alt_coa = (struct mipv6_mo_alt_coa *)mo;
++		ipv6_addr_copy(&ops->alt_coa->addr, (struct in6_addr *)data);
++		break;
++	case MIPV6_OPT_NONCE_INDICES:
++		DEBUG(DBG_INFO, "Added nonce indices pointer");
++		ops->nonce_indices = (struct mipv6_mo_nonce_indices *)mo;
++		ops->nonce_indices->home_nonce_i = *(__u16 *)data;
++		ops->nonce_indices->careof_nonce_i = *((__u16 *)data + 1);
++		break;
++	case MIPV6_OPT_AUTH_DATA:
++		DEBUG(DBG_INFO, "Added opt auth_data pointer");
++		ops->auth_data = (struct mipv6_mo_bauth_data *)mo;
++		break;
++	case MIPV6_OPT_BIND_REFRESH_ADVICE:
++		ops->br_advice = (struct mipv6_mo_br_advice *)mo;
++		ops->br_advice->refresh_interval = htons(*(u16 *)data);
++		break;
++	default:
++		DEBUG(DBG_ERROR, "Unknow option type");
++		break;
++	}
++
++	if (ops->freelen == 0)
++		ops->next_free = NULL;
++	else
++		ops->next_free += (len + 2);
++
++	return 0;
++}
++
++/*
++ * Calculates required padding with xn + y requirement with offset
++ */
++static inline int optpad(int xn, int y, int offset)
++{
++	return ((y - offset) & (xn - 1));
++}
++
++static int option_pad(int type, int offset)
++{
++	if (type == MIPV6_OPT_ALTERNATE_COA)
++		return optpad(8, 6, offset); /* 8n + 6 */
++	if (type == MIPV6_OPT_BIND_REFRESH_ADVICE ||
++	    type == MIPV6_OPT_NONCE_INDICES)
++		return optpad(2, 0, offset); /* 2n */
++	return 0;
++}
++
++/*
++ * Add Pad1 or PadN option to data
++ */
++int mipv6_add_pad(u8 *data, int n)
++{
++	struct mipv6_mo_padn *padn;
++
++	if (n <= 0) return 0;
++	if (n == 1) {
++		*data = MIPV6_OPT_PAD1;
++		return 1;
++	}
++	padn = (struct mipv6_mo_padn *)data;
++	padn->type = MIPV6_OPT_PADN;
++	padn->length = n - 2;
++	memset(padn->data, 0, n - 2);
++	return n;
++}
++
++/*
++ * Write options to mobility header buffer
++ */
++static int prepare_mh_opts(u8 *optdata, int off, struct mipv6_mh_opt *ops)
++{
++	u8 *nextopt = optdata;
++	int offset = off, pad = 0;
++
++	if (ops == NULL) {
++		nextopt = NULL;
++		return -1;
++	}
++
++	if (ops->alt_coa) {
++		pad = option_pad(MIPV6_OPT_ALTERNATE_COA, offset);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->alt_coa, sizeof(struct mipv6_mo_alt_coa));
++		nextopt += sizeof(struct mipv6_mo_alt_coa);
++		offset += pad + sizeof(struct mipv6_mo_alt_coa);
++	}
++
++	if (ops->br_advice) {
++		pad = option_pad(MIPV6_OPT_BIND_REFRESH_ADVICE, offset);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->br_advice, sizeof(struct mipv6_mo_br_advice));
++		nextopt += sizeof(struct mipv6_mo_br_advice);
++		offset += pad + sizeof(struct mipv6_mo_br_advice);
++	}
++
++	if (ops->nonce_indices) {
++		pad = option_pad(MIPV6_OPT_NONCE_INDICES, offset);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->nonce_indices, sizeof(struct mipv6_mo_nonce_indices));
++		nextopt += sizeof(struct mipv6_mo_nonce_indices);
++		offset += pad + sizeof(struct mipv6_mo_nonce_indices);
++	}
++
++	if (ops->auth_data) {
++		/* This option should always be the last.  Header
++		 * length must be a multiple of 8 octects, so we pad
++		 * if necessary. */
++		pad = optpad(8, 0, offset + ops->auth_data->length + 2);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->auth_data, ops->auth_data->length + 2);
++		nextopt += ops->auth_data->length + 2;
++	}
++	nextopt = NULL;
++
++	return 0;
++}
++
++static int calculate_mh_opts(struct mipv6_mh_opt *ops, int mh_len)
++{
++	int offset = mh_len;
++
++	if (ops == NULL)
++		return 0;
++
++	if (ops->alt_coa)
++		offset += sizeof(struct mipv6_mo_alt_coa)
++			+ option_pad(MIPV6_OPT_ALTERNATE_COA, offset);
++
++	if (ops->br_advice)
++		offset += sizeof(struct mipv6_mo_br_advice)
++			+ option_pad(MIPV6_OPT_BIND_REFRESH_ADVICE, offset);
++
++	if (ops->nonce_indices)
++		offset += sizeof(struct mipv6_mo_nonce_indices)
++			+ option_pad(MIPV6_OPT_NONCE_INDICES, offset);
++
++	if (ops->auth_data) /* no alignment */
++		offset += ops->auth_data->length + 2;
++
++	return offset - mh_len;
++}
++
++/*
++ *
++ * Mobility Header Message send functions
++ *
++ */
++
++/**
++ * send_mh - builds and sends a MH msg
++ *
++ * @daddr: destination address for packet
++ * @saddr: source address for packet
++ * @msg_type: type of MH
++ * @msg_len: message length
++ * @msg: MH type specific data
++ * @hao_addr: home address for home address option
++ * @rth_addr: routing header address
++ * @ops: mobility options
++ * @parm: auth data
++ *
++ * Builds MH, appends the type specific msg data to the header and
++ * sends the packet with a home address option, if a home address was
++ * given. Returns 0, if everything succeeded and a negative error code
++ * otherwise.
++ **/
++int send_mh(struct in6_addr *daddr, 
++	    struct in6_addr *saddr, 
++	    u8 msg_type, u8 msg_len, u8 *msg,
++	    struct in6_addr *hao_addr,
++	    struct in6_addr *rth_addr,
++	    struct mipv6_mh_opt *ops,
++	    struct mipv6_auth_parm *parm)
++{
++	struct flowi fl;
++	struct mipv6_mh *mh; 
++	struct sock *sk = mipv6_mh_socket->sk;
++	struct ipv6_txoptions *txopt = NULL;
++	int tot_len = sizeof(struct mipv6_mh) + msg_len;
++	int padded_len = 0, txopt_len = 0;
++
++	DEBUG_FUNC();
++	/* Add length of options */
++	tot_len += calculate_mh_opts(ops, tot_len);
++	/* Needs to be a multiple of 8 octets */
++	padded_len = tot_len + optpad(8, 0, tot_len);
++
++	mh = sock_kmalloc(sk, padded_len, GFP_ATOMIC);
++	if (!mh) {
++		DEBUG(DBG_ERROR, "memory allocation failed");
++		return -ENOMEM;
++	}
++
++	memset(&fl, 0, sizeof(fl)); 
++	fl.proto = IPPROTO_MOBILITY;
++	fl.fl6_dst = daddr;
++	fl.fl6_src = saddr;
++	fl.fl6_flowlabel = 0;
++	fl.oif = sk->bound_dev_if;
++
++	if (hao_addr || rth_addr) {
++		__u8 *opt_ptr;
++
++		if (hao_addr)
++			txopt_len += sizeof(struct mipv6_dstopt_homeaddr) + 6;
++		if (rth_addr)
++			txopt_len += sizeof(struct rt2_hdr);
++
++		txopt_len += sizeof(*txopt);
++		txopt = sock_kmalloc(sk, txopt_len, GFP_ATOMIC);
++		if (txopt == NULL) {
++			DEBUG(DBG_ERROR, "No socket space left");
++			sock_kfree_s(sk, mh, padded_len);
++			return -ENOMEM;
++		}
++		memset(txopt, 0, txopt_len);
++		txopt->tot_len = txopt_len;
++		opt_ptr = (__u8 *) (txopt + 1);
++		if (hao_addr) {
++			int holen = sizeof(struct mipv6_dstopt_homeaddr) + 6;
++			txopt->dst1opt = (struct ipv6_opt_hdr *) opt_ptr;
++			txopt->opt_flen += holen;
++			opt_ptr += holen;
++			mipv6_append_dst1opts(txopt->dst1opt, saddr, 
++					      NULL, holen);
++			txopt->mipv6_flags = MIPV6_SND_HAO | MIPV6_SND_BU;
++		}
++		if (rth_addr) {
++			int rtlen = sizeof(struct rt2_hdr);
++			txopt->srcrt2 = (struct ipv6_rt_hdr *) opt_ptr;
++			txopt->opt_nflen += rtlen;
++			opt_ptr += rtlen;
++			mipv6_append_rt2hdr(txopt->srcrt2, rth_addr);
++		}
++	}
++
++	/* Fill in the fields of MH */
++	mh->payload = NEXTHDR_NONE;
++	mh->length = (padded_len >> 3) - 1;	/* Units of 8 octets - 1 */
++	mh->type = msg_type;
++	mh->reserved = 0;
++	mh->checksum = 0;
++
++	memcpy(mh->data, msg, msg_len);
++	prepare_mh_opts(mh->data + msg_len, msg_len + sizeof(*mh), ops);
++	/* If BAD is present, this is already done. */
++	mipv6_add_pad((u8 *)mh + tot_len, padded_len - tot_len);
++	
++	if (parm && parm->k_bu && ops && ops->auth_data) {
++		/* Calculate the position of the authorization data before adding checksum*/
++		mipv6_auth_build(parm->cn_addr, parm->coa, (__u8 *)mh, 
++				 (__u8 *)mh + padded_len - MIPV6_RR_MAC_LENGTH, parm->k_bu);
++	}
++	/* Calculate the MH checksum */
++	mh->checksum = csum_ipv6_magic(fl.fl6_src, fl.fl6_dst, 
++				       padded_len, IPPROTO_MOBILITY,
++				       csum_partial((char *)mh, padded_len, 0));
++	ip6_build_xmit(sk, dstopts_getfrag, mh, &fl, padded_len, txopt, 255,
++		       MSG_DONTWAIT);
++	/* dst cache must be cleared so RR messages can be routed through 
++	   different interfaces */
++	sk_dst_reset(sk);
++
++	if (txopt_len)
++		sock_kfree_s(sk, txopt, txopt_len);
++	sock_kfree_s(sk, mh, padded_len);
++	return 0;
++}
++
++/**
++ * mipv6_send_brr - send a Binding Refresh Request 
++ * @saddr: source address for BRR
++ * @daddr: destination address for BRR
++ * @ops: mobility options
++ *
++ * Sends a binding request.  On a mobile node, use the mobile node's
++ * home address for @saddr.  Returns 0 on success, negative on
++ * failure.
++ **/
++int mipv6_send_brr(struct in6_addr *saddr, struct in6_addr *daddr,
++		   struct mipv6_mh_opt *ops)
++{
++	struct mipv6_mh_brr br;
++
++	memset(&br, 0, sizeof(br));
++	/* We don't need to explicitly add a RH to brr, since it will be 
++	 * included automatically, if a BCE exists 
++	 */
++	MIPV6_INC_STATS(n_brr_sent);
++	return send_mh(daddr, saddr, MIPV6_MH_BRR, sizeof(br), (u8 *)&br,
++		       NULL, NULL, ops, NULL);
++}
++
++/**
++ * mipv6_send_ba - send a Binding Acknowledgement 
++ * @saddr: source address for BA
++ * @daddr: destination address for BA 
++ * @reply_coa: destination care-of address of MN
++ * @auth_coa: care-of address of MN used for authentication
++ * @status: status field value
++ * @sequence: sequence number from BU
++ * @lifetime: granted lifetime for binding in seconds
++ * @ops: mobility options
++ *
++ * Send a binding acknowledgement.  On a mobile node, use the mobile
++ * node's home address for saddr.  Returns 0 on success, non-zero on
++ * failure.
++ **/
++int mipv6_send_ba(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *auth_coa, struct in6_addr *rep_coa,
++		  u8 status, u16 sequence, u32 lifetime, u8 *k_bu)
++{
++	struct mipv6_mh_ba ba;
++	struct mipv6_auth_parm parm;
++	struct mipv6_mh_opt *ops = NULL; 
++	int ops_len = 0, ret = 0;
++	struct mipv6_bce bc_entry;
++	int coming_home = 0;
++	int bypass_tnl = 0;
++
++	memset(&ba, 0, sizeof(ba));
++	
++	ba.status = status;
++	ba.sequence = htons(sequence);
++	ba.lifetime = htons(lifetime >> 2);
++	
++	DEBUG(DBG_INFO, "sending a status %d BA %s authenticator to MN \n"
++	      "%x:%x:%x:%x:%x:%x:%x:%x  at care of address \n" 
++	      "%x:%x:%x:%x:%x:%x:%x:%x : with lifetime %d and \n" 
++	      " sequence number %d",
++	      status, k_bu ? "with" : "without", 
++	      NIPV6ADDR(daddr), NIPV6ADDR(auth_coa), lifetime, sequence);
++
++	memset(&parm, 0, sizeof(parm));
++	parm.coa = auth_coa;
++	parm.cn_addr = saddr;
++
++	if (k_bu) {
++		ops_len += sizeof(struct mipv6_mo_bauth_data) + 
++			MIPV6_RR_MAC_LENGTH;
++		parm.k_bu = k_bu;
++	}
++
++	if (mip6node_cnf.binding_refresh_advice) {
++		ops_len += sizeof(struct mipv6_mo_br_advice);
++	}
++	if (ops_len) {
++		ops = alloc_mh_opts(ops_len);
++		if (ops == NULL) {
++			DEBUG(DBG_WARNING, "Out of memory");
++			return -ENOMEM;
++		}
++		if (mip6node_cnf.binding_refresh_advice > 0) {
++			if (append_mh_opt(ops, MIPV6_OPT_BIND_REFRESH_ADVICE, 2,
++					  &mip6node_cnf.binding_refresh_advice) < 0) {
++				DEBUG(DBG_WARNING, "Adding BRA failed");
++				if (ops)
++					kfree(ops);
++				return -ENOMEM;
++			}
++		}
++		if (k_bu) {
++			if (append_mh_opt(ops, MIPV6_OPT_AUTH_DATA,
++					  MIPV6_RR_MAC_LENGTH, NULL) < 0) {
++				DEBUG(DBG_WARNING, "Adding BAD failed");
++				if (ops)
++					kfree(ops);
++				return -ENOMEM;
++			}
++		}
++	}
++	coming_home = !ipv6_addr_cmp(rep_coa, daddr);
++
++	bypass_tnl = (coming_home &&
++		      !mipv6_bcache_get(daddr, saddr, &bc_entry) &&
++		      bc_entry.flags&MIPV6_BU_F_HOME && 
++		      status >= 128);
++
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_del)
++		mip6_fn.bce_tnl_rt_del(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++
++	if (coming_home)
++		ret = send_mh(daddr, saddr, MIPV6_MH_BA, sizeof(ba), (u8 *)&ba,
++			      NULL, NULL, ops, &parm);
++	else
++		ret = send_mh(daddr, saddr, MIPV6_MH_BA, sizeof(ba), (u8 *)&ba,
++			      NULL, rep_coa, ops, &parm);
++
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_add)
++		mip6_fn.bce_tnl_rt_add(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++	
++	if (ret == 0) {
++		if (status < 128) {
++			MIPV6_INC_STATS(n_ba_sent);
++		} else {
++			MIPV6_INC_STATS(n_ban_sent);
++		}
++	}
++
++	if (ops)
++		kfree(ops);
++
++	return 0;
++}
++
++/**
++ * mipv6_send_be - send a Binding Error message
++ * @saddr: source address for BE
++ * @daddr: destination address for BE
++ * @home: Home Address in offending packet (if any)
++ *
++ * Sends a binding error.  On a mobile node, use the mobile node's
++ * home address for @saddr.  Returns 0 on success, negative on
++ * failure.
++ **/
++int mipv6_send_be(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *home, __u8 status)
++{
++	struct mipv6_mh_be be;
++	int ret = 0;
++	struct mipv6_bce bc_entry;
++	int bypass_tnl = 0;
++
++	if (ipv6_addr_is_multicast(daddr))
++		return -EINVAL;
++
++	memset(&be, 0, sizeof(be));
++	be.status = status;
++	if (home)
++		ipv6_addr_copy(&be.home_addr, home);
++
++	if (mipv6_bcache_get(daddr, saddr, &bc_entry) == 0 &&
++	    bc_entry.flags&MIPV6_BU_F_HOME)
++		bypass_tnl = 1;
++
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_del)
++		mip6_fn.bce_tnl_rt_del(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++
++	ret = send_mh(daddr, saddr, MIPV6_MH_BE, sizeof(be), (u8 *)&be,
++		      NULL, NULL, NULL, NULL);
++	
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_add)
++		mip6_fn.bce_tnl_rt_add(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++
++	if (ret == 0)
++		MIPV6_INC_STATS(n_be_sent);
++
++	return ret;
++}
++
++/**
++ * mipv6_send_addr_test - send a HoT or CoT message
++ * @saddr: source address
++ * @daddr: destination address
++ * @msg_type: HoT or CoT message
++ * @init: HoTI or CoTI message
++ *
++ * Send a reply to HoTI or CoTI message. 
++ **/
++static int mipv6_send_addr_test(struct in6_addr *saddr,
++				struct in6_addr *daddr,
++				int msg_type,
++				struct mipv6_mh_addr_ti *init)
++{
++	u_int8_t			*kgen_token = NULL;
++	struct mipv6_mh_addr_test       addr_test;      
++	struct mipv6_rr_nonce		*nonce;
++	struct mipv6_mh_opt *ops = NULL;
++	int ret = 0;
++
++	DEBUG_FUNC();
++
++	if ((nonce = mipv6_rr_get_new_nonce())== NULL) {
++		DEBUG(DBG_WARNING, "Nonce creation failed");
++		return 0;
++	} 
++	if (mipv6_rr_cookie_create(daddr, &kgen_token, nonce->index)) {
++		DEBUG(DBG_WARNING, "No cookie");
++		return 0;
++	}
++
++	addr_test.nonce_index = nonce->index;
++	memcpy(addr_test.init_cookie, init->init_cookie,
++			MIPV6_RR_COOKIE_LENGTH);
++	memcpy(addr_test.kgen_token, kgen_token,
++			MIPV6_RR_COOKIE_LENGTH);
++
++	/* No options defined */
++	ret = send_mh(daddr, saddr, msg_type, sizeof(addr_test),
++		      (u8 *)&addr_test, NULL, NULL, ops, NULL);
++
++	if (ret == 0) {
++		if (msg_type == MIPV6_MH_HOT) {
++			MIPV6_INC_STATS(n_hot_sent);
++		} else {
++			MIPV6_INC_STATS(n_cot_sent);
++		}
++	}
++
++	return 0;
++}
++
++static void bc_cache_add(int ifindex, struct in6_addr *daddr,
++			 struct in6_addr *haddr, struct in6_addr *coa,
++			 struct in6_addr *rep_coa, __u32 lifetime,
++			 __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	__u8 ba_status = SUCCESS;
++
++	if (lifetime >  MAX_RR_BINDING_LIFE)
++		lifetime = MAX_RR_BINDING_LIFE;
++
++	if (mipv6_bcache_add(ifindex, daddr, haddr, coa, lifetime,
++			     sequence, flags, CACHE_ENTRY) != 0) {
++		DEBUG(DBG_ERROR, "binding failed.");
++		ba_status = INSUFFICIENT_RESOURCES;
++	} 
++
++	if (flags & MIPV6_BU_F_ACK) {
++		DEBUG(DBG_INFO, "sending ack (code=%d)", ba_status);
++		mipv6_send_ba(daddr, haddr, coa, rep_coa, ba_status, sequence,
++			      lifetime, k_bu);
++	}
++}
++
++static void bc_cn_home_add(int ifindex, struct in6_addr *daddr, 
++			   struct in6_addr *haddr, struct in6_addr *coa,
++			   struct in6_addr *rep_coa, __u32 lifetime,
++			   __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	mipv6_send_ba(daddr, haddr, coa, rep_coa,
++		      HOME_REGISTRATION_NOT_SUPPORTED,
++		      sequence, lifetime, k_bu);
++}
++
++static void bc_cache_delete(struct in6_addr *daddr, struct in6_addr *haddr, 
++			    struct in6_addr *coa, struct in6_addr *rep_coa,
++			    __u16 sequence, __u8 flags,
++			    __u8 *k_bu)
++{
++	__u8 status = SUCCESS;
++
++	/* Cached Care-of Address Deregistration */
++	if (mipv6_bcache_exists(haddr, daddr) == CACHE_ENTRY) {
++		mipv6_bcache_delete(haddr, daddr, CACHE_ENTRY);
++	} else {
++		DEBUG(DBG_INFO, "entry is not in cache");
++		status = REASON_UNSPECIFIED;
++	}
++	if (flags & MIPV6_BU_F_ACK) {
++		mipv6_send_ba(daddr, haddr, coa, rep_coa, status, sequence, 
++			      0, k_bu);
++	}
++}
++
++static void bc_cn_home_delete(struct in6_addr *daddr, struct in6_addr *haddr, 
++			      struct in6_addr *coa, struct in6_addr *rep_coa,
++			      __u16 sequence, __u8 flags,
++			      __u8 *k_bu)
++{
++}
++
++/**
++ * parse_mo_tlv - Parse TLV-encoded Mobility Options
++ * @mos: pointer to Mobility Options
++ * @len: total length of options
++ * @opts: structure to store option pointers
++ *
++ * Parses Mobility Options passed in @mos.  Stores pointers in @opts
++ * to all valid mobility options found in @mos.  Unknown options and
++ * padding (%MIPV6_OPT_PAD1 and %MIPV6_OPT_PADN) is ignored and
++ * skipped.
++ **/
++int parse_mo_tlv(void *mos, int len, struct mobopt *opts)
++{
++	struct mipv6_mo *curr = (struct mipv6_mo *)mos;
++	int left = len;
++
++	while (left > 0) {
++		int optlen = 0;
++		if (curr->type == MIPV6_OPT_PAD1)
++			optlen = 1;
++		else
++			optlen = 2 + curr->length;
++
++		if (optlen > left)
++			goto bad;
++
++		switch (curr->type) {
++		case MIPV6_OPT_PAD1:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_PAD1 at %x", curr);
++			break;
++		case MIPV6_OPT_PADN:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_PADN at %x", curr);
++			break;
++		case MIPV6_OPT_ALTERNATE_COA:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_ACOA at %x", curr);
++			opts->alt_coa = (struct mipv6_mo_alt_coa *)curr;
++			break;
++		case MIPV6_OPT_NONCE_INDICES:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_NONCE_INDICES at %x", curr);
++			opts->nonce_indices = 
++				(struct mipv6_mo_nonce_indices *)curr;
++			break;
++		case MIPV6_OPT_AUTH_DATA:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_AUTH_DATA at %x", curr);
++			opts->auth_data = (struct mipv6_mo_bauth_data *)curr;
++			break;
++		case MIPV6_OPT_BIND_REFRESH_ADVICE:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_BIND_REFRESH_ADVICE at %x", curr);
++			opts->br_advice = (struct mipv6_mo_br_advice *)curr;
++			break;
++		default:
++			DEBUG(DBG_INFO, "MO Unknown option type %d at %x, ignoring.",
++			       curr->type, curr);
++			/* unknown mobility option, ignore and skip */
++		}
++
++		(u8 *)curr += optlen;
++		left -= optlen;
++	}
++
++	if (left == 0)
++		return 0;
++ bad:
++	return -1;
++}
++
++/*
++ *
++ * Mobility Header Message handlers
++ *
++ */
++
++static int mipv6_handle_mh_testinit(struct sk_buff *skb,
++				    struct in6_addr *cn,
++				    struct in6_addr *lcoa,
++				    struct in6_addr *saddr,
++				    struct in6_addr *fcoa,
++				    struct mipv6_mh *mh)
++{
++	struct mipv6_mh_addr_ti *ti = (struct mipv6_mh_addr_ti *)mh->data;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++	DEBUG_FUNC();
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*ti);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "Mobility Header length less than H/C TestInit");
++		return -1;
++	}
++	if (!mip6node_cnf.accept_ret_rout) {
++		DEBUG(DBG_INFO, "Return routability administratively disabled");
++		return -1;
++	}
++	if (lcoa || fcoa) {
++		DEBUG(DBG_INFO, "H/C TestInit has HAO or RTH2, dropped.");
++		return -1;
++	}
++
++	if (mh->type == MIPV6_MH_HOTI) {
++		MIPV6_INC_STATS(n_hoti_rcvd);
++		return mipv6_send_addr_test(cn, saddr, MIPV6_MH_HOT, ti);
++	} else if (mh->type == MIPV6_MH_COTI) {
++		MIPV6_INC_STATS(n_coti_rcvd);
++		return mipv6_send_addr_test(cn, saddr, MIPV6_MH_COT, ti);
++	} else 
++		return -1; /* Impossible to get here */
++}
++
++/**
++ * mipv6_handle_mh_bu - Binding Update handler
++ * @src: care-of address of sender
++ * @dst: our address
++ * @haddr: home address of sender
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ * Handles Binding Update. Packet and offset to option are passed.
++ * Returns 0 on success, otherwise negative.
++ **/
++static int mipv6_handle_mh_bu(struct sk_buff *skb,
++			      struct in6_addr *dst,
++			      struct in6_addr *unused,
++			      struct in6_addr *haddr, 
++			      struct in6_addr *coaddr,
++			      struct mipv6_mh *mh)
++{
++	struct mipv6_mh_bu *bu = (struct mipv6_mh_bu *)mh->data;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++	int auth = 0;
++	int dereg; /* Is this deregistration? */ 
++	int addr_type;
++
++	struct mipv6_bce bc_entry;
++	struct in6_addr *coa, *reply_coa;
++	__u8 *key_bu = NULL; /* RR BU authentication key */
++	__u8 flags = bu->flags;
++	__u16 sequence;
++	__u32 lifetime;
++	__u16 nonce_ind = (__u16) -1; 
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*bu);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "Mobility Header length less than BU");
++		MIPV6_INC_STATS(n_bu_drop.invalid);
++		return -1;
++	}
++
++	addr_type = ipv6_addr_type(haddr);
++	if (addr_type&IPV6_ADDR_LINKLOCAL || !(addr_type&IPV6_ADDR_UNICAST))
++		return -EINVAL;
++
++	/* If HAO not present, CoA == HAddr */
++	if (coaddr == NULL) 
++		coa = haddr;
++	else {
++		coa = coaddr;
++		addr_type = ipv6_addr_type(coa);
++		if (addr_type&IPV6_ADDR_LINKLOCAL ||
++		    !(addr_type&IPV6_ADDR_UNICAST))
++			return -EINVAL;
++	}
++	reply_coa = coa;
++
++	sequence = ntohs(bu->sequence);
++	if (bu->lifetime == 0xffff)
++		lifetime = 0xffffffff;
++	else
++		lifetime = ntohs(bu->lifetime) << 2;
++
++	dereg = (ipv6_addr_cmp(haddr, coa) == 0 || lifetime == 0);
++
++	if (opt_len > 0) {
++		struct mobopt opts;
++		memset(&opts, 0, sizeof(opts));
++		if (parse_mo_tlv(bu + 1, opt_len, &opts) < 0) {
++			MIPV6_INC_STATS(n_bu_drop.invalid);
++			return -1;
++		}
++		/*
++		 * MIPV6_OPT_AUTH_DATA, MIPV6_OPT_NONCE_INDICES, 
++		 * MIPV6_OPT_ALT_COA
++		 */
++		if (opts.alt_coa) {
++			coa = &opts.alt_coa->addr;
++			dereg = (ipv6_addr_cmp(haddr, coa) == 0 || lifetime == 0);
++		}
++		addr_type = ipv6_addr_type(coa);
++		if (addr_type&IPV6_ADDR_LINKLOCAL || 
++		    !(addr_type&IPV6_ADDR_UNICAST))
++			return -EINVAL;
++
++		if (flags & MIPV6_BU_F_HOME) {
++			if (opts.nonce_indices)
++				return -1;
++		} else {
++			u8 ba_status = 0;
++			u8 *h_ckie  = NULL, *c_ckie = NULL; /* Home and care-of cookies */
++
++			/* BUs to CN MUST include authorization data and nonce indices options */
++			if (!opts.auth_data || !opts.nonce_indices) {
++				DEBUG(DBG_WARNING,
++				      "Route optimization BU without authorization material, aborting processing");
++				return MH_AUTH_FAILED;
++			}
++			if (mipv6_rr_cookie_create(
++				    haddr, &h_ckie, opts.nonce_indices->home_nonce_i) < 0) {
++				DEBUG(DBG_WARNING,
++				      "mipv6_rr_cookie_create failed for home cookie");
++				ba_status = EXPIRED_HOME_NONCE_INDEX;
++			}
++			nonce_ind = opts.nonce_indices->home_nonce_i;
++			/* Don't create the care-of cookie, if MN deregisters */
++			if (!dereg && mipv6_rr_cookie_create(
++				    coa, &c_ckie,
++				    opts.nonce_indices->careof_nonce_i) < 0) {
++				DEBUG(DBG_WARNING,
++				      "mipv6_rr_cookie_create failed for coa cookie");
++				if (ba_status == 0)
++					ba_status = EXPIRED_CAREOF_NONCE_INDEX;
++				else
++					ba_status = EXPIRED_NONCES;
++			}
++			if (ba_status == 0) {
++				if (dereg)
++					key_bu = mipv6_rr_key_calc(h_ckie, NULL);
++				else
++					key_bu = mipv6_rr_key_calc(h_ckie, c_ckie);	       
++				mh->checksum = 0;/* TODO: Don't mangle the packet */
++				if (key_bu && mipv6_auth_check(
++					dst, coa, (__u8 *)mh,  msg_len + sizeof(*mh), opts.auth_data, key_bu) == 0) {
++					DEBUG(DBG_INFO, "mipv6_auth_check OK for BU");
++					auth = 1;
++				} else {
++					DEBUG(DBG_WARNING, 
++					      "BU Authentication failed");
++				}
++			}
++			if (h_ckie)
++				kfree(h_ckie);
++			if (c_ckie)
++				kfree(c_ckie);
++			if (ba_status != 0) {
++				MIPV6_INC_STATS(n_bu_drop.auth);
++				mipv6_send_ba(dst, haddr, coa,
++					      reply_coa, ba_status,
++					      sequence, 0, NULL);
++				goto out;
++			}
++		}
++
++	}
++	/* Require authorization option for RO, home reg is protected by IPsec */
++	if (!(flags & MIPV6_BU_F_HOME) && !auth) {
++		MIPV6_INC_STATS(n_bu_drop.auth);
++		if (key_bu)
++			kfree(key_bu);
++		return MH_AUTH_FAILED;
++	}
++
++	if (mipv6_bcache_get(haddr, dst, &bc_entry) == 0) {
++		if ((bc_entry.flags&MIPV6_BU_F_HOME) != 
++		    (flags&MIPV6_BU_F_HOME)) {
++			DEBUG(DBG_INFO,
++			      "Registration type change. Sending BA REG_TYPE_CHANGE_FORBIDDEN");
++			mipv6_send_ba(dst, haddr, coa, reply_coa,
++				      REG_TYPE_CHANGE_FORBIDDEN,
++				      sequence, lifetime, key_bu);
++			goto out;
++		}
++		if (!MIPV6_SEQ_GT(sequence, bc_entry.seq)) {
++			DEBUG(DBG_INFO,
++			      "Sequence number mismatch. Sending BA SEQUENCE_NUMBER_OUT_OF_WINDOW");
++			mipv6_send_ba(dst, haddr, coa, reply_coa,
++				      SEQUENCE_NUMBER_OUT_OF_WINDOW,
++				      bc_entry.seq, lifetime, key_bu);
++			goto out;
++		}
++	}
++
++	if (!dereg) {
++		int ifindex;
++		struct rt6_info *rt;
++
++		/* Avoid looping binding cache entries */
++		if (mipv6_bcache_get(coa, dst, &bc_entry) == 0) {
++			DEBUG(DBG_WARNING, "Looped BU, dropping the packet");
++			goto out;
++		}
++		DEBUG(DBG_INFO, "calling bu_add.");
++		if ((rt = rt6_lookup(haddr, dst, 0, 0)) != NULL) {
++			ifindex = rt->rt6i_dev->ifindex;
++			dst_release(&rt->u.dst);
++		} else {
++			/*
++			 * Can't process the BU since the right interface is 
++			 * not found.
++			 */
++			DEBUG(DBG_WARNING, "No route entry found for handling "
++			      "a BU request, (using 0 as index)");
++			ifindex = 0;
++		}
++		if (flags & MIPV6_BU_F_HOME)
++			mip6_fn.bce_home_add(ifindex, dst, haddr, coa, 
++					     reply_coa, lifetime, sequence,
++					     flags, key_bu);
++		else
++			mip6_fn.bce_cache_add(ifindex, dst, haddr, coa, 
++					      reply_coa, lifetime, sequence,
++					      flags, key_bu);
++	} else {
++		DEBUG(DBG_INFO, "calling BCE delete.");
++
++		if (flags & MIPV6_BU_F_HOME)
++			mip6_fn.bce_home_del(dst, haddr, coa, reply_coa,
++					     sequence, flags, key_bu);
++		else {
++			mipv6_rr_invalidate_nonce(nonce_ind);
++			mip6_fn.bce_cache_del(dst, haddr, coa, reply_coa, 
++					      sequence, flags, key_bu);
++		}
++	}
++ out:
++	MIPV6_INC_STATS(n_bu_rcvd);
++	if (key_bu)
++		kfree(key_bu);
++	return 0;
++}
++
++static int mipv6_mh_rcv(struct sk_buff *skb)
++{
++	struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
++	struct mipv6_mh *mh;
++	struct in6_addr *lhome, *fhome, *lcoa = NULL, *fcoa = NULL;
++	int ret = 0;
++
++	fhome = &skb->nh.ipv6h->saddr;
++	lhome = &skb->nh.ipv6h->daddr;
++
++	if (opt->hao != 0) {
++		struct mipv6_dstopt_homeaddr *hao;
++		hao = (struct mipv6_dstopt_homeaddr *)(skb->nh.raw + opt->hao);
++		fcoa = &hao->addr;
++	}
++
++	if (opt->srcrt2 != 0) {
++		struct rt2_hdr *rt2;
++		rt2 = (struct rt2_hdr *)((u8 *)skb->nh.raw + opt->srcrt2);
++		lcoa = &rt2->addr;
++	}
++
++	/* Verify checksum is correct */
++	if (skb->ip_summed == CHECKSUM_HW) {
++		skb->ip_summed = CHECKSUM_UNNECESSARY;
++		if (csum_ipv6_magic(fhome, lhome, skb->len, IPPROTO_MOBILITY,
++				    skb->csum)) {
++			if (net_ratelimit())
++				printk(KERN_WARNING "MIPv6 MH hw checksum failed\n");
++			skb->ip_summed = CHECKSUM_NONE;
++		}
++	}
++	if (skb->ip_summed == CHECKSUM_NONE) {
++		if (csum_ipv6_magic(fhome, lhome, skb->len, IPPROTO_MOBILITY,
++				    skb_checksum(skb, 0, skb->len, 0))) {
++			if (net_ratelimit())
++				printk(KERN_WARNING "MIPv6 MH checksum failed\n");
++			goto bad;
++		}
++	}
++
++	if (!pskb_may_pull(skb, skb->h.raw-skb->data+sizeof(*mh)) ||
++	    !pskb_may_pull(skb, 
++			   skb->h.raw-skb->data+((skb->h.raw[1]+1)<<3))) {
++		DEBUG(DBG_INFO, "MIPv6 MH invalid length");
++		kfree_skb(skb);
++		return 0;
++	}
++
++	mh = (struct mipv6_mh *) skb->h.raw;
++
++	/* Verify there are no more headers after the MH */
++	if (mh->payload != NEXTHDR_NONE) {
++		__u32 pos = (__u32)&mh->payload - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "MIPv6 MH error");
++		goto bad;
++	}
++
++	if (mh->type > MIPV6_MH_MAX) {
++		/* send binding error */
++		printk("Invalid mobility header type (%d)\n", mh->type);
++		mipv6_send_be(lhome, fcoa ? fcoa : fhome,
++			      fcoa ? fhome : NULL, 
++			      MIPV6_BE_UNKNOWN_MH_TYPE);
++		goto bad;
++	}
++	if (mh_rcv[mh->type].func != NULL) {
++		ret = mh_rcv[mh->type].func(skb, lhome, lcoa, fhome, fcoa, mh);
++	} else {
++		DEBUG(DBG_INFO, "No handler for MH Type %d", mh->type);
++		goto bad;
++	}
++
++	kfree_skb(skb);
++	return 0;
++
++bad:
++	MIPV6_INC_STATS(n_mh_in_error);
++	kfree_skb(skb);
++	return 0;
++
++}
++
++#if LINUX_VERSION_CODE >= 0x2052a
++struct inet6_protocol mipv6_mh_protocol =
++{
++	mipv6_mh_rcv,		/* handler		*/
++	NULL			/* error control	*/
++};
++#else
++struct inet6_protocol mipv6_mh_protocol = 
++{
++	mipv6_mh_rcv,		/* handler		*/
++	NULL,			/* error control	*/
++	NULL,			/* next			*/
++	IPPROTO_MOBILITY,	/* protocol ID		*/
++	0,			/* copy			*/
++	NULL,			/* data			*/
++	"MIPv6 MH"	       	/* name			*/
++};
++#endif
++
++/*
++ *
++ * Code module init/exit functions
++ *
++ */
++
++int __init mipv6_mh_common_init(void)
++{
++	struct sock *sk;
++	int err;
++
++	mip6_fn.bce_home_add = bc_cn_home_add;
++	mip6_fn.bce_cache_add = bc_cache_add;
++	mip6_fn.bce_home_del = bc_cn_home_delete;
++	mip6_fn.bce_cache_del = bc_cache_delete;
++
++	mipv6_mh_socket = sock_alloc();
++	if (mipv6_mh_socket == NULL) {
++		printk(KERN_ERR
++		       "Failed to create the MIP6 MH control socket.\n");
++		return -1;
++	}
++	mipv6_mh_socket->type = SOCK_RAW;
++
++	if ((err = sock_create(PF_INET6, SOCK_RAW, IPPROTO_MOBILITY, 
++			       &mipv6_mh_socket)) < 0) {
++		printk(KERN_ERR
++		       "Failed to initialize the MIP6 MH control socket (err %d).\n",
++		       err);
++		sock_release(mipv6_mh_socket);
++		mipv6_mh_socket = NULL; /* for safety */
++		return err;
++	}
++
++	sk = mipv6_mh_socket->sk;
++	sk->allocation = GFP_ATOMIC;
++	sk->sndbuf = 64 * 1024 + sizeof(struct sk_buff);
++	sk->prot->unhash(sk);
++
++	memset(&mh_rcv, 0, sizeof(mh_rcv));
++	mh_rcv[MIPV6_MH_HOTI].func = mipv6_handle_mh_testinit;
++	mh_rcv[MIPV6_MH_COTI].func = mipv6_handle_mh_testinit;
++	mh_rcv[MIPV6_MH_BU].func =  mipv6_handle_mh_bu;
++
++#if LINUX_VERSION_CODE >= 0x2052a
++	if (inet6_add_protocol(&mipv6_mh_protocol, IPPROTO_MOBILITY) < 0) {
++		printk(KERN_ERR "Failed to register MOBILITY protocol\n");
++		sock_release(mipv6_mh_socket);
++		mipv6_mh_socket = NULL;
++		return -EAGAIN;
++	}
++#else
++	inet6_add_protocol(&mipv6_mh_protocol);
++#endif
++	/* To disable the use of dst_cache, 
++	 *  which slows down the sending of BUs ??
++	 */
++	sk->dst_cache=NULL; 
++
++	return 0;
++}
++
++void __exit mipv6_mh_common_exit(void)
++{
++	if (mipv6_mh_socket) sock_release(mipv6_mh_socket);
++	mipv6_mh_socket = NULL; /* For safety. */
++
++#if LINUX_VERSION_CODE >= 0x2052a
++	inet6_del_protocol(&mipv6_mh_protocol, IPPROTO_MOBILITY);
++#else
++	inet6_del_protocol(&mipv6_mh_protocol);
++#endif
++	memset(&mh_rcv, 0, sizeof(mh_rcv));
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/mobhdr_mn.c linux-2.4.25/net/ipv6/mobile_ip6/mobhdr_mn.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/mobhdr_mn.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/mobhdr_mn.c	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,1155 @@
++/*
++ *	Mobile IPv6 Mobility Header Functions for Mobile Node
++ *
++ *	Authors:
++ *	Antti Tuominen	<ajtuomin@tml.hut.fi>
++ *	Niklas K�mpe	<nhkampe@cc.hut.fi>
++ *	Henrik Petander	<henrik.petander@hut.fi>
++ *
++ *	$Id:$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License as
++ *	published by the Free Software Foundation; either version 2 of
++ *	the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/types.h>
++#include <linux/sched.h>
++#include <linux/init.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "mobhdr.h"
++#include "mn.h"
++#include "bul.h"
++#include "rr_crypto.h"
++#include "debug.h"
++#include "util.h"
++#include "stats.h"
++
++int rr_configured = 1;
++
++/* Return value of mipv6_rr_state() */
++#define NO_RR			0
++#define DO_RR			1
++#define RR_FOR_COA		2
++#define INPROGRESS_RR		3
++
++/** 
++ * send_bu_msg - sends a Binding Update 
++ * @bulentry : BUL entry with the information for building a BU
++ *
++ * Function builds a BU msg based on the contents of a bul entry.
++ * Does not change the bul entry.
++ **/
++static int send_bu_msg(struct mipv6_bul_entry *binding)
++{ 
++	int auth = 0; /* Use auth */
++	int ret = 0;
++	struct mipv6_auth_parm parm;
++	struct mipv6_mh_bu bu;
++
++	if (!binding) {
++		DEBUG(DBG_ERROR, "called with a null bul entry");
++		return -1;
++	}
++	
++	memset(&parm, 0, sizeof(parm));
++	if (mipv6_prefix_compare(&binding->coa, &binding->home_addr, 64))
++		parm.coa = &binding->home_addr;
++	else
++		parm.coa = &binding->coa;
++	parm.cn_addr = &binding->cn_addr;
++
++	if (binding->rr && binding->rr->kbu) {
++		DEBUG(DBG_INFO, "Binding with key");
++		auth = 1;
++		parm.k_bu = binding->rr->kbu;
++	}
++	memset(&bu, 0, sizeof(bu));
++	bu.flags = binding->flags;
++	bu.sequence = htons(binding->seq);
++	bu.lifetime = htons(binding->lifetime >> 2);
++	bu.reserved = 0;
++
++	ret = send_mh(&binding->cn_addr, &binding->home_addr,
++		      MIPV6_MH_BU, sizeof(bu), (u8 *)&bu, 
++		      &binding->home_addr, NULL, 
++		      binding->ops, &parm);
++
++	if (ret == 0)
++		MIPV6_INC_STATS(n_bu_sent);
++
++	return ret;
++}
++
++/**
++ * mipv6_send_addr_test_init - send a HoTI or CoTI message
++ * @saddr: source address for H/CoTI
++ * @daddr: destination address for H/CoTI
++ * @msg_type: Identifies whether HoTI or CoTI
++ * @init_cookie: the HoTi or CoTi init cookie
++ *
++ * The message will be retransmitted till we get a HoT or CoT message, since 
++ * our caller (mipv6_RR_start) has entered this message in the BUL with
++ * exponential backoff retramission set.
++ */
++static int mipv6_send_addr_test_init(struct in6_addr *saddr,
++				     struct in6_addr *daddr,
++				     u8 msg_type,
++				     u8 *init_cookie)
++{
++	struct mipv6_mh_addr_ti ti;
++	struct mipv6_mh_opt *ops = NULL;
++	int ret = 0;
++
++	/* Set reserved and copy the cookie from address test init msg */
++	ti.reserved = 0;
++	mipv6_rr_mn_cookie_create(init_cookie);
++	memcpy(ti.init_cookie, init_cookie, MIPV6_RR_COOKIE_LENGTH);
++
++	ret = send_mh(daddr, saddr, msg_type, sizeof(ti), (u8 *)&ti,
++		      NULL, NULL, ops, NULL);
++	if (ret == 0) {
++		if (msg_type == MIPV6_MH_HOTI) {
++			MIPV6_INC_STATS(n_hoti_sent);
++		} else {
++			MIPV6_INC_STATS(n_coti_sent);
++		}
++	}
++
++	return ret;
++}
++
++/*
++ *
++ * Callback handlers for binding update list
++ *
++ */
++
++/* Return value 0 means keep entry, non-zero means discard entry. */
++
++/* Callback for BUs not requiring acknowledgement
++ */
++int bul_entry_expired(struct mipv6_bul_entry *bulentry)
++{
++	/* Lifetime expired, delete entry. */
++	DEBUG(DBG_INFO, "bul entry 0x%p lifetime expired, deleting entry", 
++	      bulentry);
++	return 1;
++}
++
++/* Callback for BUs requiring acknowledgement with exponential resending
++ * scheme */
++static int bul_resend_exp(struct mipv6_bul_entry *bulentry)
++{
++	unsigned long now = jiffies;
++	
++	DEBUG(DBG_INFO, "(0x%x) resending bu", (int) bulentry);
++
++	
++	/* If sending a de-registration, do not care about the
++	 * lifetime value, as de-registrations are normally sent with
++	 * a zero lifetime value. If the entry is a home entry get the 
++	 * current lifetime. 
++	 */
++
++	if (bulentry->lifetime != 0) {
++		bulentry->lifetime = mipv6_mn_get_bulifetime(
++			&bulentry->home_addr, &bulentry->coa, bulentry->flags);
++
++		bulentry->expire = now + bulentry->lifetime * HZ;
++	} else {
++		bulentry->expire = now + HOME_RESEND_EXPIRE * HZ; 
++	}
++	if (bulentry->rr) {
++		/* Redo RR, if cookies have expired */
++		if (time_after(jiffies, bulentry->rr->home_time + MAX_TOKEN_LIFE * HZ)) 
++			bulentry->rr->rr_state |= RR_WAITH;
++		if (time_after(jiffies, bulentry->rr->careof_time + MAX_NONCE_LIFE * HZ)) 
++			bulentry->rr->rr_state |= RR_WAITC;
++
++		if (bulentry->rr->rr_state & RR_WAITH) {
++			/* Resend HoTI directly */
++			mipv6_send_addr_test_init(&bulentry->home_addr, 
++						  &bulentry->cn_addr, MIPV6_MH_HOTI,
++						  bulentry->rr->hot_cookie);
++		}
++		if (bulentry->rr->rr_state & RR_WAITC) {
++				/* Resend CoTI directly */
++				mipv6_send_addr_test_init(&bulentry->coa, 
++							  &bulentry->cn_addr, MIPV6_MH_COTI,
++							  bulentry->rr->cot_cookie);
++			}
++		goto out;
++	}
++	
++	bulentry->seq++;
++
++	if (send_bu_msg(bulentry) < 0)
++		DEBUG(DBG_ERROR, "Resending of BU failed");
++
++out:
++	/* Schedule next retransmission */
++	if (bulentry->delay < bulentry->maxdelay) {
++		bulentry->delay = 2 * bulentry->delay;
++		if (bulentry->delay > bulentry->maxdelay) {
++			/* can happen if maxdelay is not power(mindelay, 2) */
++			bulentry->delay = bulentry->maxdelay;
++		}
++	} else if (bulentry->flags & MIPV6_BU_F_HOME) {
++		/* Home registration - continue sending BU at maxdelay rate */
++		DEBUG(DBG_INFO, "Sending BU to HA after max ack wait time "
++		      "reached(0x%x)", (int) bulentry);
++		bulentry->delay = bulentry->maxdelay;
++	} else if (!(bulentry->flags & MIPV6_BU_F_HOME)) {
++		/* Failed to get BA from a CN */
++		bulentry->callback_time = now;
++		return -1;
++	}
++	
++	bulentry->callback_time = now + bulentry->delay * HZ;
++	return 0;
++}
++
++
++
++/* Callback for sending a registration refresh BU
++ */
++static int bul_refresh(struct mipv6_bul_entry *bulentry)
++{
++	unsigned long now = jiffies;
++	
++	/* Refresh interval passed, send new BU */
++	DEBUG(DBG_INFO, "bul entry 0x%x refresh interval passed, sending new BU", (int) bulentry);
++	if (bulentry->lifetime == 0)
++		return 0;
++
++	/* Set new maximum lifetime and expiration time */
++	bulentry->lifetime = mipv6_mn_get_bulifetime(&bulentry->home_addr, 
++						     &bulentry->coa, 
++						     bulentry->flags);
++	bulentry->expire = now + bulentry->lifetime * HZ;
++	bulentry->seq++;
++	/* Send update */
++	if (send_bu_msg(bulentry) < 0)
++		DEBUG(DBG_ERROR, "Resending of BU failed");
++	
++	if (time_after_eq(now, bulentry->expire)) {
++		/* Sanity check */
++		DEBUG(DBG_ERROR, "bul entry expire time in history - setting expire to %u secs", ERROR_DEF_LIFETIME);
++		bulentry->lifetime = ERROR_DEF_LIFETIME;
++		bulentry->expire = now + ERROR_DEF_LIFETIME*HZ;
++	}
++
++	/* Set up retransmission */
++	bulentry->state = RESEND_EXP;
++	bulentry->callback = bul_resend_exp;
++	bulentry->callback_time = now + INITIAL_BINDACK_TIMEOUT*HZ;
++	bulentry->delay = INITIAL_BINDACK_TIMEOUT;
++	bulentry->maxdelay = MAX_BINDACK_TIMEOUT;
++
++	return 0;
++}
++
++static int mipv6_send_RR_bu(struct mipv6_bul_entry *bulentry)
++{
++	int ret;
++	int ops_len = 0;
++	u16 nonces[2];
++
++	DEBUG(DBG_INFO, "Sending BU to CN  %x:%x:%x:%x:%x:%x:%x:%x "
++	      "for home address %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(&bulentry->cn_addr), NIPV6ADDR(&bulentry->home_addr));
++	nonces[0] = bulentry->rr->home_nonce_index;
++	nonces[1] = bulentry->rr->careof_nonce_index;
++	ops_len = sizeof(struct mipv6_mo_bauth_data) + MIPV6_RR_MAC_LENGTH + 
++			sizeof(struct mipv6_mo_nonce_indices);
++	if (bulentry->ops) {
++		DEBUG(DBG_WARNING, "Bul entry had existing mobility options, freeing them");
++		kfree(bulentry->ops);
++	}
++	bulentry->ops = alloc_mh_opts(ops_len);
++
++	if (!bulentry->ops)
++		return -ENOMEM;
++	if (append_mh_opt(bulentry->ops, MIPV6_OPT_NONCE_INDICES, 
++			  sizeof(struct mipv6_mo_nonce_indices) - 2, nonces) < 0)
++		return -ENOMEM;
++
++	if (append_mh_opt(bulentry->ops, MIPV6_OPT_AUTH_DATA,
++			  MIPV6_RR_MAC_LENGTH, NULL) < 0)
++		return -ENOMEM;
++	/* RR procedure is over, send a BU */
++	if (!(bulentry->flags & MIPV6_BU_F_ACK)) {
++		DEBUG(DBG_INFO, "Setting bul callback to bul_entry_expired");
++		bulentry->state = ACK_OK;
++		bulentry->callback = bul_entry_expired;
++		bulentry->callback_time = jiffies + HZ * bulentry->lifetime;
++		bulentry->expire = jiffies + HZ *  bulentry->lifetime;
++	}
++	else {
++		bulentry->callback_time = jiffies + HZ;
++		bulentry->expire = jiffies + HZ *  bulentry->lifetime;
++	}
++
++	ret  = send_bu_msg(bulentry);
++	mipv6_bul_reschedule(bulentry);
++	return ret;
++}
++
++static int mipv6_rr_state(struct mipv6_bul_entry *bul, struct in6_addr *saddr,
++			  struct in6_addr *coa, __u8 flags)
++{
++	if (!rr_configured)
++		return NO_RR;
++       	if (flags & MIPV6_BU_F_HOME) {
++		/* We don't need RR, this is a Home Registration */
++		return NO_RR;
++	}
++	if (!bul || !bul->rr) {
++		/* First time BU to CN, need RR */
++		return DO_RR;
++	}
++
++	switch (bul->rr->rr_state) {
++	case RR_INIT:
++		/* Need RR if first BU to CN */
++		return DO_RR;
++	case RR_DONE:
++		/* If MN moves to a new coa, do RR for it */
++		if (!ipv6_addr_cmp(&bul->coa, coa))  
++			return NO_RR; 
++		else
++			return DO_RR;
++	default:
++		/*
++		 * We are in the middle of RR, the HoTI and CoTI have been
++		 * sent. But we haven't got HoT and CoT from the CN, so
++		 * don't do anything more at this time.
++		 */
++		return INPROGRESS_RR;
++	}
++}
++
++/**
++ * mipv6_RR_start - Start Return Routability procedure
++ * @home_addr: home address
++ * @cn_addr: correspondent address
++ * @coa: care-of address
++ * @entry: binding update list entry (if any)
++ * @initdelay: initial ack timeout
++ * @maxackdelay: maximum ack timeout
++ * @flags: flags
++ * @lifetime: lifetime of binding
++ * @ops: mobility options
++ *
++ * Caller must hold @bul_lock (write).
++ **/
++static int mipv6_RR_start(struct in6_addr *home_addr, struct in6_addr *cn_addr,
++			  struct in6_addr *coa, struct mipv6_bul_entry *entry,
++			  __u32 initdelay, __u32 maxackdelay, __u8 flags, 
++			  __u32 lifetime, struct mipv6_mh_opt *ops)
++{
++	int ret = -1;
++	struct mipv6_bul_entry *bulentry = entry;
++	struct mipv6_rr_info *rr = NULL;
++	int seq = 0;
++	DEBUG_FUNC();
++	
++	/* Do RR procedure only for care-of address after handoff, 
++	   if home cookie is still valid */
++	if (bulentry && bulentry->rr) {
++		if (time_before(jiffies, bulentry->rr->home_time + MAX_NONCE_LIFE * HZ) &&
++		    lifetime && !(ipv6_addr_cmp(home_addr, coa) == 0)) { 
++			mipv6_rr_mn_cookie_create(bulentry->rr->cot_cookie); 
++			DEBUG(DBG_INFO, "Bul entry and rr info exist, only doing RR for CoA");
++			ipv6_addr_copy(&bulentry->coa, coa);
++			bulentry->rr->rr_state |= RR_WAITC;
++		} else if (!lifetime) { /* Send only HoTi when returning home */
++			mipv6_rr_mn_cookie_create(bulentry->rr->hot_cookie); 
++			DEBUG(DBG_INFO, "Bul entry and rr info exist, only doing RR for HoA");
++			ipv6_addr_copy(&bulentry->coa, coa); /* Home address as CoA */
++			bulentry->rr->rr_state |= RR_WAITH;
++		}
++	} else {
++		DEBUG(DBG_INFO, "Doing RR for both HoA and CoA");
++		rr = kmalloc(sizeof(*rr), GFP_ATOMIC);
++		memset(rr, 0, sizeof(*rr));
++		rr->rr_state = RR_WAITHC;
++	} 
++	if (bulentry) {
++		if (bulentry->state == ACK_ERROR)
++			goto out;
++		seq = bulentry->seq + 1;
++	} else
++		seq = 0;
++	/* Save the info in the BUL to retransmit the BU after RR is done */
++	/* Caller must hold bul_lock (write) since we don't */
++       
++	if ((bulentry = mipv6_bul_add(cn_addr, home_addr, coa, 
++				      min_t(__u32, lifetime, MAX_RR_BINDING_LIFE),
++				      seq, flags, bul_resend_exp, initdelay, 
++				      RESEND_EXP, initdelay, 
++				      maxackdelay, ops, 
++				      rr)) == NULL) {
++		DEBUG(DBG_INFO, "couldn't update BUL for HoTi");
++		goto out;
++	}
++
++	rr = bulentry->rr; 
++	if (rr->rr_state&RR_WAITH)
++		mipv6_send_addr_test_init(home_addr, cn_addr, MIPV6_MH_HOTI, 
++					  rr->hot_cookie);
++	if (ipv6_addr_cmp(home_addr, coa) && lifetime) 
++		mipv6_send_addr_test_init(coa, cn_addr, MIPV6_MH_COTI, rr->cot_cookie);
++	else {
++		bulentry->rr->rr_state &= ~RR_WAITC;
++	}
++	ret = 0;
++out:
++	return ret;
++}
++
++/*
++ * Status codes for mipv6_ba_rcvd()
++ */
++#define STATUS_UPDATE 0
++#define STATUS_REMOVE 1
++
++/**
++ * mipv6_ba_rcvd - Update BUL for this Binding Acknowledgement
++ * @ifindex: interface BA came from
++ * @cnaddr: sender IPv6 address
++ * @home_addr: home address
++ * @sequence: sequence number
++ * @lifetime: lifetime granted by Home Agent in seconds
++ * @refresh: recommended resend interval
++ * @status: %STATUS_UPDATE (ack) or %STATUS_REMOVE (nack)
++ *
++ * This function must be called to notify the module of the receipt of
++ * a binding acknowledgement so that it can cease retransmitting the
++ * option. The caller must have validated the acknowledgement before calling
++ * this function. 'status' can be either STATUS_UPDATE in which case the
++ * binding acknowledgement is assumed to be valid and the corresponding
++ * binding update list entry is updated, or STATUS_REMOVE in which case
++ * the corresponding binding update list entry is removed (this can be
++ * used upon receiving a negative acknowledgement).
++ * Returns 0 if a matching binding update has been sent or non-zero if
++ * not.
++ */
++static int mipv6_ba_rcvd(int ifindex, struct in6_addr *cnaddr, 
++			 struct in6_addr *home_addr, 
++			 u16 sequence, u32 lifetime, 
++			 u32 refresh, int status)
++{
++	struct mipv6_bul_entry *bulentry;
++	unsigned long now = jiffies;
++	struct in6_addr coa;
++
++	DEBUG(DBG_INFO, "BA received with sequence number 0x%x, status: %d",
++	      (int) sequence, status);
++
++	/* Find corresponding entry in binding update list. */
++	write_lock(&bul_lock);
++	if ((bulentry = mipv6_bul_get(cnaddr, home_addr)) == NULL) {
++		DEBUG(DBG_INFO, "- discarded, no entry in bul matches BA source address");
++		write_unlock(&bul_lock);
++		return -1;
++	}
++	
++	ipv6_addr_copy(&coa, &bulentry->coa); 
++	if (status == SEQUENCE_NUMBER_OUT_OF_WINDOW) {
++		__u32 lifetime = mipv6_mn_get_bulifetime(&bulentry->home_addr, 
++							 &bulentry->coa, 
++							 bulentry->flags);
++		bulentry->seq = sequence;
++
++		mipv6_send_bu(&bulentry->home_addr, &bulentry->cn_addr, 
++			      &bulentry->coa, INITIAL_BINDACK_TIMEOUT,
++			      MAX_BINDACK_TIMEOUT, 1, bulentry->flags,
++			      lifetime, NULL);
++		write_unlock(&bul_lock);
++		return 0;
++	} else if (status >= REASON_UNSPECIFIED) {
++		int err;
++		int at_home = MN_NOT_AT_HOME;
++		DEBUG(DBG_WARNING, "- NACK - BA status:  %d, deleting bul entry", status);
++		if (bulentry->flags & MIPV6_BU_F_HOME) {
++			struct mn_info *minfo;
++			read_lock(&mn_info_lock);
++			minfo = mipv6_mninfo_get_by_home(home_addr);
++			if (minfo) {
++				spin_lock(&minfo->lock);
++				if (minfo->is_at_home != MN_NOT_AT_HOME)
++					minfo->is_at_home = MN_AT_HOME;
++				at_home = minfo->is_at_home;
++				minfo->has_home_reg = 0;
++				spin_unlock(&minfo->lock);
++			}
++			read_unlock(&mn_info_lock);
++			DEBUG(DBG_ERROR, "Home registration failed: BA status:  %d, deleting bul entry", status);
++		}
++		write_unlock(&bul_lock);
++		err = mipv6_bul_delete(cnaddr, home_addr);
++		if (at_home == MN_AT_HOME) {
++			mipv6_mn_send_home_na(home_addr);
++			write_lock_bh(&bul_lock);
++			mipv6_bul_iterate(mn_cn_handoff, &coa);
++			write_unlock_bh(&bul_lock);
++		}
++		return err;
++	}
++	bulentry->state = ACK_OK;
++
++	if (bulentry->flags & MIPV6_BU_F_HOME && lifetime > 0) {
++		/* For home registrations: schedule a refresh binding update.
++		 * Use the refresh interval given by home agent or 80%
++		 * of lifetime, whichever is less.
++		 *
++		 * Adjust binding lifetime if 'granted' lifetime
++		 * (lifetime value in received binding acknowledgement)
++		 * is shorter than 'requested' lifetime (lifetime
++		 * value sent in corresponding binding update).
++		 * max((L_remain - (L_update - L_ack)), 0)
++		 */
++		if (lifetime * HZ < (bulentry->expire - bulentry->lastsend)) {
++			bulentry->expire = 
++				max_t(__u32, bulentry->expire - 
++				      ((bulentry->expire - bulentry->lastsend) - 
++				       lifetime * HZ), jiffies + 
++				      ERROR_DEF_LIFETIME * HZ);
++		}
++		if (refresh > lifetime || refresh == 0)
++			refresh = 4 * lifetime / 5;
++			DEBUG(DBG_INFO, "setting callback for expiration of"
++			      " a Home Registration: lifetime:%d, refresh:%d",
++			      lifetime, refresh);
++		bulentry->callback = bul_refresh;
++		bulentry->callback_time = now + refresh * HZ;
++		bulentry->expire = now + lifetime * HZ;
++		bulentry->lifetime = lifetime;
++		if (time_after_eq(jiffies, bulentry->expire)) {
++			/* Sanity check */
++			DEBUG(DBG_ERROR, "bul entry expire time in history - setting expire to %u secs",
++			      ERROR_DEF_LIFETIME);
++			bulentry->expire = jiffies + ERROR_DEF_LIFETIME * HZ;
++		}
++		mipv6_mn_set_home_reg(home_addr, 1);
++		mipv6_bul_iterate(mn_cn_handoff, &coa);
++	} else if ((bulentry->flags & MIPV6_BU_F_HOME) && bulentry->lifetime == 0) {
++		write_unlock(&bul_lock);
++		DEBUG(DBG_INFO, "Got BA for deregistration BU");
++		mipv6_mn_set_home_reg(home_addr, 0);
++		mipv6_bul_delete(cnaddr, home_addr);
++		mipv6_mn_send_home_na(home_addr);
++
++		write_lock_bh(&bul_lock);
++		mipv6_bul_iterate(mn_cn_handoff, &coa);
++		write_unlock_bh(&bul_lock);
++ 		return 0;
++	}
++
++	mipv6_bul_reschedule(bulentry);
++	write_unlock(&bul_lock);
++
++	return 0;
++}
++
++static int mipv6_handle_mh_HC_test(struct sk_buff *skb,
++				   struct in6_addr *saddr,
++				   struct in6_addr *fcoa,
++				   struct in6_addr *cn,
++				   struct in6_addr *lcoa,
++				   struct mipv6_mh *mh)
++{
++	int ret = 0;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++
++	struct mipv6_mh_addr_test *tm = (struct mipv6_mh_addr_test *)mh->data;
++	struct mipv6_bul_entry *bulentry;
++
++	DEBUG_FUNC();
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*tm);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "Mobility Header length less than H/C Test");
++		return -1;
++	}
++	if (fcoa || lcoa) {
++		DEBUG(DBG_INFO, "H/C Test has HAO or RTH2, dropped.");
++		return -1;
++	}
++	write_lock(&bul_lock);
++
++	/* We need to get the home address, since CoT only has the CoA*/
++	if (mh->type == MIPV6_MH_COT) {
++		if ((bulentry = mipv6_bul_get_by_ccookie(cn, tm->init_cookie)) == NULL) {
++			DEBUG(DBG_ERROR, "has no BUL or RR state for "
++			      "source:%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(cn));
++			write_unlock(&bul_lock);
++			return -1;
++		}
++	} else { /* HoT has the home address */
++		if (((bulentry = mipv6_bul_get(cn, saddr)) == NULL) || !bulentry->rr) {
++			DEBUG(DBG_ERROR, "has no BUL or RR state for "
++			      "source:%x:%x:%x:%x:%x:%x:%x:%x "
++			      "dest:%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(cn), NIPV6ADDR(saddr));
++			write_unlock(&bul_lock);
++			return -1;
++		}
++	}
++
++	switch (mh->type) {
++	case MIPV6_MH_HOT:
++		if ((bulentry->rr->rr_state & RR_WAITH) == 0) {
++			DEBUG(DBG_ERROR, "Not waiting for a Home Test message");
++			goto out;
++		}
++		/*
++		 * Make sure no home cookies have been received yet.
++		 * TODO: Check not being put in at this time since subsequent
++		 * BU's after this time will have home cookie stored.
++		 */
++	
++		/* Check if the cookie received is the right one */
++		if (!mipv6_equal_cookies(tm->init_cookie,
++					 bulentry->rr->hot_cookie)) {
++			/* Invalid cookie, might be an old cookie */
++			DEBUG(DBG_WARNING, "Received HoT cookie does not match stored cookie");
++			goto out;
++		}
++		DEBUG(DBG_INFO, "Got Care-of Test message");
++		bulentry->rr->rr_state &= ~RR_WAITH;
++		memcpy(bulentry->rr->home_cookie, tm->kgen_token, MIPV6_COOKIE_LEN);
++		bulentry->rr->home_nonce_index = tm->nonce_index;
++		bulentry->rr->home_time = jiffies;
++		ret = 1;
++		break;
++
++	case MIPV6_MH_COT:
++		if ((bulentry->rr->rr_state & RR_WAITC) == 0) {
++			DEBUG(DBG_ERROR, "Not waiting for a Home Test message");
++			goto out;
++		}
++		/*
++		 * Make sure no home cookies have been received yet.
++		 * TODO: Check not being put in at this time since subsequent
++		 * BU's at this time will have careof cookie stored.
++		 */
++	
++		/* Check if the cookie received is the right one */
++		if (!mipv6_equal_cookies(tm->init_cookie,
++					 bulentry->rr->cot_cookie)) {
++			DEBUG(DBG_INFO, "Received CoT cookie does not match stored cookie");
++			goto out;
++		}
++		bulentry->rr->rr_state &= ~RR_WAITC;
++		memcpy(bulentry->rr->careof_cookie, tm->kgen_token, MIPV6_COOKIE_LEN);
++		bulentry->rr->careof_nonce_index = tm->nonce_index;
++		bulentry->rr->careof_time = jiffies;
++		ret = 1;
++		break;
++	default:
++		/* Impossible to get here */
++		break;
++	}
++out:
++	if (bulentry->rr->rr_state == RR_DONE) {
++		if (bulentry->rr->kbu) /* First free any old keys */
++			kfree(bulentry->rr->kbu);
++		/* Store the session key to be used in BU's */
++		if (ipv6_addr_cmp(&bulentry->coa, &bulentry->home_addr) && bulentry->lifetime)
++			bulentry->rr->kbu = mipv6_rr_key_calc(bulentry->rr->home_cookie,
++							      bulentry->rr->careof_cookie);
++		else 
++			bulentry->rr->kbu = mipv6_rr_key_calc(bulentry->rr->home_cookie,
++							      NULL);
++		/* RR procedure is over, send a BU */
++		mipv6_send_RR_bu(bulentry);
++	}
++	write_unlock(&bul_lock);
++	return ret;
++}
++
++/**
++ * mipv6_handle_mh_brr - Binding Refresh Request handler
++ * @home: home address
++ * @coa: care-of address
++ * @cn: source of this packet
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ * Handles Binding Refresh Request.  Packet and offset to option are
++ * passed.  Returns 0 on success, otherwise negative.
++ **/
++static int mipv6_handle_mh_brr(struct sk_buff *skb,
++			       struct in6_addr *home,
++			       struct in6_addr *unused1,
++			       struct in6_addr *cn,
++			       struct in6_addr *unused2,
++			       struct mipv6_mh *mh)
++{
++	struct mipv6_mh_brr *brr = (struct mipv6_mh_brr *)mh->data;
++	struct mipv6_bul_entry *binding;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*brr);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_WARNING, "Mobility Header length less than BRR");
++		MIPV6_INC_STATS(n_brr_drop.invalid);
++		return -1;
++	}
++
++	/* check we know src, else drop */
++	write_lock(&bul_lock);
++	if ((binding = mipv6_bul_get(cn, home)) == NULL) {
++		MIPV6_INC_STATS(n_brr_drop.misc);
++		write_unlock(&bul_lock);
++		return MH_UNKNOWN_CN;
++	}
++
++	MIPV6_INC_STATS(n_brr_rcvd);
++
++	if (opt_len > 0) {
++		struct mobopt opts;
++		memset(&opts, 0, sizeof(opts));
++		if (parse_mo_tlv(brr + 1, opt_len, &opts) < 0) {
++			write_unlock(&bul_lock);
++			return -1;
++		}
++		/*
++		 * MIPV6_OPT_AUTH_DATA
++		 */
++	}
++
++	/* must hold bul_lock (write) */
++	mipv6_RR_start(home, cn, &binding->coa, binding, binding->delay, 
++		       binding->maxdelay, binding->flags,
++		       binding->lifetime, binding->ops);
++
++	write_unlock(&bul_lock);
++	/* MAY also decide to delete binding and send zero lifetime BU
++           with alt-coa set to home address */
++
++	return 0;
++}
++
++/**
++ * mipv6_handle_mh_ba - Binding Acknowledgement handler
++ * @src: source of this packet
++ * @coa: care-of address
++ * @home: home address
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ **/
++static int mipv6_handle_mh_ba(struct sk_buff *skb,
++			      struct in6_addr *home,
++			      struct in6_addr *coa,
++			      struct in6_addr *src,
++			      struct in6_addr *unused,
++			      struct mipv6_mh *mh)
++{
++	struct mipv6_mh_ba *ba = (struct mipv6_mh_ba *)mh->data;
++	struct mipv6_bul_entry *binding = NULL;
++	struct mobopt opts;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++
++	int auth = 1, req_auth = 1, refresh = -1, ifindex = 0;
++	u32 lifetime, sequence;
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*ba);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_WARNING, "Mobility Header length less than BA");
++		MIPV6_INC_STATS(n_ba_drop.invalid);
++		return -1;
++	}
++
++	lifetime = ntohs(ba->lifetime) << 2;
++	sequence = ntohs(ba->sequence);
++
++	if (opt_len > 0) {
++		memset(&opts, 0, sizeof(opts));
++		if (parse_mo_tlv(ba + 1, opt_len, &opts) < 0)
++			return -1;
++		/*
++		 * MIPV6_OPT_AUTH_DATA, MIPV6_OPT_BR_ADVICE
++		 */
++		if (opts.br_advice)
++			refresh = ntohs(opts.br_advice->refresh_interval);
++	}
++
++	if (ba->status >= EXPIRED_HOME_NONCE_INDEX && 
++	    ba->status <= EXPIRED_NONCES) 
++		req_auth = 0;
++	
++	write_lock(&bul_lock);
++	binding = mipv6_bul_get(src, home);
++	if (!binding) {
++		DEBUG(DBG_INFO, "No binding, BA dropped.");
++		write_unlock(&bul_lock);
++		return -1;
++	}
++
++	if (opts.auth_data && binding->rr && 
++	    (mipv6_auth_check(src, coa, (__u8 *)mh, msg_len, 
++			      opts.auth_data, binding->rr->kbu) == 0))
++		auth = 1;
++
++	if (req_auth && binding->rr && !auth) {
++		DEBUG(DBG_INFO, "BA Authentication failed.");
++		MIPV6_INC_STATS(n_ba_drop.auth);
++		write_unlock(&bul_lock);
++		return MH_AUTH_FAILED;
++	}
++
++	if (ba->status == SEQUENCE_NUMBER_OUT_OF_WINDOW) {
++		DEBUG(DBG_INFO,
++		      "Sequence number out of window, setting seq to %d",
++		      sequence);
++	} else if (binding->seq != sequence) {
++		DEBUG(DBG_INFO, "BU/BA Sequence Number mismatch %d != %d",
++		      binding->seq, sequence);
++		MIPV6_INC_STATS(n_ba_drop.invalid);
++		write_unlock(&bul_lock);
++		return MH_SEQUENCE_MISMATCH;
++	}
++	if (ba->status == EXPIRED_HOME_NONCE_INDEX || ba->status == EXPIRED_NONCES) {
++		if (binding->rr) {
++			/* Need to resend home test init to CN */
++			binding->rr->rr_state |= RR_WAITH;
++			mipv6_send_addr_test_init(&binding->home_addr, 
++						  &binding->cn_addr, 
++						  MIPV6_MH_HOTI,
++						  binding->rr->hot_cookie);
++			MIPV6_INC_STATS(n_ban_rcvd);
++		} else {
++			DEBUG(DBG_WARNING, "Got BA with status EXPIRED_HOME_NONCE_INDEX"
++			      "for non-RR BU");
++			MIPV6_INC_STATS(n_ba_drop.invalid);
++		}
++		write_unlock(&bul_lock);
++		return 0;
++	} 
++	if (ba->status == EXPIRED_CAREOF_NONCE_INDEX || ba->status == EXPIRED_NONCES) {
++		if (binding->rr) { 
++			/* Need to resend care-of test init to CN */
++			binding->rr->rr_state |= RR_WAITC;
++			mipv6_send_addr_test_init(&binding->coa, 
++						  &binding->cn_addr, 
++						  MIPV6_MH_COTI,
++						  binding->rr->cot_cookie);
++			MIPV6_INC_STATS(n_ban_rcvd);
++		} else  {
++			DEBUG(DBG_WARNING, "Got BA with status EXPIRED_HOME_CAREOF_INDEX"
++			      "for non-RR BU");
++			MIPV6_INC_STATS(n_ba_drop.invalid);
++		}
++		write_unlock(&bul_lock);
++		return 0;
++	}
++	write_unlock(&bul_lock);
++	
++	if (ba->status >= REASON_UNSPECIFIED) {
++		DEBUG(DBG_INFO, "Binding Ack status : %d indicates error", ba->status);
++		mipv6_ba_rcvd(ifindex, src, home, sequence, lifetime,
++			      refresh, ba->status);
++		MIPV6_INC_STATS(n_ban_rcvd);
++		return 0;
++	}
++	MIPV6_INC_STATS(n_ba_rcvd);
++	if (mipv6_ba_rcvd(ifindex, src, home, ntohs(ba->sequence), lifetime,
++			  refresh, ba->status)) {
++		DEBUG(DBG_WARNING, "mipv6_ba_rcvd failed");
++	}
++	
++	return 0;
++}
++
++/**
++ * mipv6_handle_mh_be - Binding Error handler
++ * @cn: source of this packet
++ * @coa: care-of address
++ * @home: home address
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ **/
++
++static int mipv6_handle_mh_be(struct sk_buff *skb,
++			      struct in6_addr *home,
++			      struct in6_addr *coa,
++			      struct in6_addr *cn,
++			      struct in6_addr *unused,
++			      struct mipv6_mh *mh)
++{
++	struct mipv6_mh_be *be = (struct mipv6_mh_be *)mh->data;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++	struct in6_addr *hoa;
++	struct bul_inval_args args;
++
++	DEBUG_FUNC();
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*be);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_WARNING, "Mobility Header length less than BE");
++		MIPV6_INC_STATS(n_be_drop.invalid);
++		return -1;
++	}
++
++	
++	if (!ipv6_addr_any(&be->home_addr))
++		hoa = &be->home_addr;
++	else
++		hoa = home;
++
++	MIPV6_INC_STATS(n_be_rcvd);
++
++	args.all_rr_states = 0;
++	args.cn = cn;
++	args.mn = hoa;
++
++	switch (be->status) {
++	case 1: /* Home Address Option used without a binding */
++		/* Get ULP information about CN-MN communication.  If
++                   nothing in progress, MUST delete.  Otherwise MAY
++                   ignore. */
++		args.all_rr_states = 1;
++	case 2: /* Received unknown MH type */
++		/* If not expecting ack, SHOULD ignore.  If MH
++                   extension in use, stop it.  If not, stop RO for
++                   this CN. */
++		write_lock(&bul_lock);
++		mipv6_bul_iterate(mn_bul_invalidate, &args);
++		write_unlock(&bul_lock);
++		break;
++	}
++
++	return 0;
++}
++
++/*
++ * mipv6_bu_rate_limit() : Takes a bulentry, a COA and 'flags' to check
++ * whether BU being sent is for Home Registration or not.
++ *
++ * If the number of BU's sent is fewer than MAX_FAST_UPDATES, this BU
++ * is allowed to be sent at the MAX_UPDATE_RATE.
++ * If the number of BU's sent is greater than or equal to MAX_FAST_UPDATES,
++ * this BU is allowed to be sent at the SLOW_UPDATE_RATE.
++ *
++ * Assumption : This function is not re-entrant. and the caller holds the
++ * bulentry lock (by calling mipv6_bul_get()) to stop races with other
++ * CPU's executing this same function.
++ *
++ * Side-Effects. Either of the following could  on success :
++ *	1. Sets consecutive_sends to 1 if the entry is a Home agent
++ *	   registration or the COA has changed.
++ *	2. Increments consecutive_sends if the number of BU's sent so
++ *	   far is less than MAX_FAST_UPDATES, and this BU is being sent
++ *	   atleast MAX_UPDATE_RATE after previous one.
++ * 
++ * Return Value : 0 on Success, -1 on Failure
++ */
++static int mipv6_bu_rate_limit(struct mipv6_bul_entry *bulentry, 
++			       struct in6_addr *coa, __u8 flags)
++{
++	if ((flags & MIPV6_BU_F_HOME) || ipv6_addr_cmp(&bulentry->coa, coa)) {
++		/* Home Agent Registration or different COA - restart from 1 */
++		bulentry->consecutive_sends = 1;
++		return 0;
++	}
++
++	if (bulentry->consecutive_sends < MAX_FAST_UPDATES) {
++		/* First MAX_FAST_UPDATES can be sent at MAX_UPDATE_RATE */
++		if (jiffies - bulentry->lastsend < MAX_UPDATE_RATE * HZ) {
++			return -1;
++		}
++		bulentry->consecutive_sends ++;
++	} else {
++		/* Remaining updates SHOULD be sent at SLOW_UPDATE_RATE */
++		if (jiffies - bulentry->lastsend < SLOW_UPDATE_RATE * HZ) {
++			return -1;
++		}
++		/* Don't inc 'consecutive_sends' to avoid overflow to zero */
++	}
++	/* OK to send a BU */
++	return 0;
++}
++
++/**
++ * mipv6_send_bu - send a Binding Update 
++ * @saddr: source address for BU
++ * @daddr: destination address for BU
++ * @coa: care-of address for MN
++ * @initdelay: initial BA wait timeout
++ * @maxackdelay: maximum BA wait timeout
++ * @exp: exponention back off
++ * @flags: flags for BU
++ * @lifetime: granted lifetime for binding
++ * @ops: mobility options
++ *
++ * Send a binding update.  'flags' may contain any of %MIPV6_BU_F_ACK,
++ * %MIPV6_BU_F_HOME, %MIPV6_BU_F_ROUTER bitwise ORed.  If
++ * %MIPV6_BU_F_ACK is included retransmission will be attempted until
++ * the update has been acknowledged.  Retransmission is done if no
++ * acknowledgement is received within @initdelay seconds.  @exp
++ * specifies whether to use exponential backoff (@exp != 0) or linear
++ * backoff (@exp == 0).  For exponential backoff the time to wait for
++ * an acknowledgement is doubled on each retransmission until a delay
++ * of @maxackdelay, after which retransmission is no longer attempted.
++ * For linear backoff the delay is kept constant and @maxackdelay
++ * specifies the maximum number of retransmissions instead.  If
++ * sub-options are present ops must contain all sub-options to be
++ * added.  On a mobile node, use the mobile node's home address for
++ * @saddr.  Returns 0 on success, non-zero on failure.
++ *
++ * Caller may not hold @bul_lock.
++ **/
++int mipv6_send_bu(struct in6_addr *saddr, struct in6_addr *daddr,
++		  struct in6_addr *coa, u32 initdelay, 
++		  u32 maxackdelay, u8 exp, u8 flags, u32 lifetime,
++		  struct mipv6_mh_opt *ops)
++{
++	int ret;
++	__u8 state;
++	 __u16 seq = 0;
++	int (*callback)(struct mipv6_bul_entry *);
++	__u32 callback_time;
++	struct mipv6_bul_entry *bulentry;
++	
++	/* First a sanity check: don't send BU to local addresses */
++	if(ipv6_chk_addr(daddr, NULL)) {
++		DEBUG(DBG_ERROR, "BUG: Trying to send BU to local address");
++		return -1;
++	}
++	DEBUG(DBG_INFO, "Sending BU to CN  %x:%x:%x:%x:%x:%x:%x:%x "
++	      "for home address %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(daddr), NIPV6ADDR(saddr));
++
++	if ((bulentry = mipv6_bul_get(daddr, saddr)) != NULL) {
++		if (bulentry->state == ACK_ERROR) {
++			/*
++			 * Don't send any more BU's to nodes which don't
++			 * understanding one. 
++			 */
++			DEBUG(DBG_INFO, "Not sending BU to node which doesn't"
++			      " understand one");
++			return -1;
++		}
++		if (mipv6_bu_rate_limit(bulentry, coa, flags) < 0) {
++			DEBUG(DBG_DATADUMP, "Limiting BU sent.");
++			return 0;
++		}
++	}
++
++	switch (mipv6_rr_state(bulentry, saddr, coa, flags)) {
++	case INPROGRESS_RR:
++		/* We are already doing RR, don't do BU at this time, it is
++		 * done automatically later */
++		DEBUG(DBG_INFO, "RR in progress not sending BU");
++		return 0;
++
++	case DO_RR:
++		/* Just do RR and return, BU is done automatically later */
++		DEBUG(DBG_INFO, "starting RR" );
++		mipv6_RR_start(saddr, daddr, coa, bulentry, initdelay,
++			       maxackdelay, flags, lifetime, ops);
++		return 0;
++		
++	case NO_RR:
++		DEBUG(DBG_DATADUMP, "No RR necessary" );
++	default:
++		break;
++	}
++
++	if (bulentry)
++		seq = bulentry->seq + 1;
++	
++	/* Add to binding update list */
++	
++	if (flags & MIPV6_BU_F_ACK) {
++		DEBUG(DBG_INFO, "Setting bul callback to bul_resend_exp");
++		/* Send using exponential backoff */
++		state = RESEND_EXP;
++		callback = bul_resend_exp;
++		callback_time = initdelay;
++	} else {
++		DEBUG(DBG_INFO, "Setting bul callback to bul_entry_expired");
++		/* No acknowledgement/resending required */
++		state = ACK_OK;	/* pretend we got an ack */
++		callback = bul_entry_expired;
++		callback_time = lifetime;
++	}
++
++	/* BU only for the home address */
++	/* We must hold bul_lock (write) while calling add */
++	if ((bulentry = mipv6_bul_add(daddr, saddr, coa, lifetime, seq,
++				      flags, callback, callback_time, 
++				      state, initdelay, maxackdelay, ops, 
++				      NULL)) == NULL) {
++		DEBUG(DBG_INFO, "couldn't update BUL");
++		return 0;
++	}
++	ret = send_bu_msg(bulentry);
++
++	return ret;
++}
++
++int __init mipv6_mh_mn_init(void)
++{
++	mipv6_mh_register(MIPV6_MH_HOT, mipv6_handle_mh_HC_test);
++	mipv6_mh_register(MIPV6_MH_COT, mipv6_handle_mh_HC_test);
++	mipv6_mh_register(MIPV6_MH_BA, mipv6_handle_mh_ba);
++	mipv6_mh_register(MIPV6_MH_BRR, mipv6_handle_mh_brr);
++	mipv6_mh_register(MIPV6_MH_BE, mipv6_handle_mh_be);
++
++	return 0;
++}
++
++void __exit mipv6_mh_mn_exit(void)
++{
++	mipv6_mh_unregister(MIPV6_MH_HOT);
++	mipv6_mh_unregister(MIPV6_MH_COT);
++	mipv6_mh_unregister(MIPV6_MH_BA);
++	mipv6_mh_unregister(MIPV6_MH_BRR);
++	mipv6_mh_unregister(MIPV6_MH_BE);
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/module_cn.c linux-2.4.25/net/ipv6/mobile_ip6/module_cn.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/module_cn.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/module_cn.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,167 @@
++/*
++ *	Mobile IPv6 Common Module
++ *
++ *	Authors:
++ *	Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *	Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License
++ *	as published by the Free Software Foundation; either version
++ *	2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/init.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/mipglue.h>
++
++#include "bcache.h"
++#include "mipv6_icmp.h"
++#include "stats.h"
++#include "mobhdr.h"
++#include "exthdrs.h"
++
++int mipv6_debug = 1;
++
++#if defined(MODULE) && LINUX_VERSION_CODE > 0x20115
++MODULE_AUTHOR("MIPL Team");
++MODULE_DESCRIPTION("Mobile IPv6");
++MODULE_LICENSE("GPL");
++MODULE_PARM(mipv6_debug, "i");
++#endif
++
++#include "config.h"
++
++struct mip6_func mip6_fn;
++struct mip6_conf mip6node_cnf = {
++	capabilities:		CAP_CN,
++	accept_ret_rout:	1,
++	max_rtr_reachable_time:	0,
++	eager_cell_switching:	0,
++	max_num_tunnels:	0,
++	min_num_tunnels:	0,
++	binding_refresh_advice:	0,
++	bu_lladdr:		0,
++	bu_keymgm:		0,
++	bu_cn_ack:		0
++};
++
++#define MIPV6_BCACHE_SIZE 128
++
++/**********************************************************************
++ *
++ * MIPv6 CN Module Init / Cleanup
++ *
++ **********************************************************************/
++
++#ifdef CONFIG_SYSCTL
++/* Sysctl table */
++ctl_table mipv6_mobility_table[] = {
++	{NET_IPV6_MOBILITY_DEBUG, "debuglevel",
++	 &mipv6_debug, sizeof(int), 0644, NULL,
++	 &proc_dointvec},
++	{NET_IPV6_MOBILITY_RETROUT, "accept_return_routability",
++	 &mip6node_cnf.accept_ret_rout, sizeof(int), 0644, NULL,
++	 &proc_dointvec},
++	{0}
++};
++ctl_table mipv6_table[] = {
++	{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, mipv6_mobility_table},
++	{0}
++};
++
++static struct ctl_table_header *mipv6_sysctl_header;
++static struct ctl_table mipv6_net_table[];
++static struct ctl_table mipv6_root_table[];
++
++ctl_table mipv6_net_table[] = {
++	{NET_IPV6, "ipv6", NULL, 0, 0555, mipv6_table},
++	{0}
++};
++
++ctl_table mipv6_root_table[] = {
++	{CTL_NET, "net", NULL, 0, 0555, mipv6_net_table},
++	{0}
++};
++#endif /* CONFIG_SYSCTL */
++
++extern void mipv6_rr_init(void);
++
++/*  Initialize the module  */
++static int __init mip6_init(void)
++{
++	int err = 0;
++
++	printk(KERN_INFO "MIPL Mobile IPv6 for Linux Correspondent Node %s (%s)\n",
++	       MIPLVERSION, MIPV6VERSION);
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++	printk(KERN_INFO "Debug-level: %d\n", mipv6_debug);
++#endif
++
++	if ((err = mipv6_bcache_init(MIPV6_BCACHE_SIZE)) < 0)
++		goto bcache_fail;
++
++	if ((err = mipv6_icmpv6_init()) < 0)
++		goto icmp_fail;
++
++	if ((err = mipv6_stats_init()) < 0)
++		goto stats_fail;
++	mipv6_rr_init();
++
++#ifdef CONFIG_SYSCTL
++	mipv6_sysctl_header = register_sysctl_table(mipv6_root_table, 0);
++#endif
++
++	if ((err = mipv6_mh_common_init()) < 0)
++		goto mh_fail;
++
++	MIPV6_SETCALL(mipv6_modify_txoptions, mipv6_modify_txoptions);
++		
++	MIPV6_SETCALL(mipv6_handle_homeaddr, mipv6_handle_homeaddr);
++	MIPV6_SETCALL(mipv6_icmp_swap_addrs, mipv6_icmp_swap_addrs);
++
++	return 0;
++
++mh_fail:
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++	mipv6_stats_exit();
++stats_fail:
++	mipv6_icmpv6_exit();
++icmp_fail:
++	mipv6_bcache_exit();
++bcache_fail:
++	return err;
++}
++module_init(mip6_init);
++
++#ifdef MODULE
++/*  Cleanup module  */
++static void __exit mip6_exit(void)
++{
++	printk(KERN_INFO "mip6_base.o exiting.\n");
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++
++	/* Invalidate all custom kernel hooks.  No need to do this
++           separately for all hooks. */
++	mipv6_invalidate_calls();
++
++	mipv6_mh_common_exit();
++	mipv6_stats_exit();
++	mipv6_icmpv6_exit();
++	mipv6_bcache_exit();
++}
++module_exit(mip6_exit);
++#endif /* MODULE */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/module_ha.c linux-2.4.25/net/ipv6/mobile_ip6/module_ha.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/module_ha.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/module_ha.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,264 @@
++/*
++ *	Mobile IPv6 Home Agent Module
++ *
++ *	Authors:
++ *	Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *	Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License
++ *	as published by the Free Software Foundation; either version
++ *	2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/init.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/mipglue.h>
++#include <net/addrconf.h>
++
++#include "mobhdr.h"
++#include "tunnel_ha.h"
++#include "ha.h"
++#include "halist.h"
++#include "mipv6_icmp.h"
++//#include "prefix.h"
++#include "bcache.h"
++#include "debug.h"
++
++int mipv6_use_auth = 0;
++
++#if defined(MODULE) && LINUX_VERSION_CODE > 0x20115
++MODULE_AUTHOR("MIPL Team");
++MODULE_DESCRIPTION("Mobile IPv6 Home Agent");
++MODULE_LICENSE("GPL");
++#endif
++
++#include "config.h"
++
++#define MIPV6_HALIST_SIZE 128
++struct ha_info_opt {
++	u8 type;
++	u8 len;
++	u16 res;
++	u16 pref;
++	u16 ltime;
++};
++/*
++ * Called from ndisc.c's router_discovery.
++ */
++static int mipv6_ha_ra_rcv(struct sk_buff *skb, struct ndisc_options *ndopts)
++{
++	unsigned int ha_info_pref = 0, ha_info_lifetime;
++	int ifi = ((struct inet6_skb_parm *)skb->cb)->iif;
++	struct ra_msg *ra = (struct ra_msg *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr ll_addr;
++	struct hal {
++		struct in6_addr prefix;
++		int plen;
++		struct hal *next;
++	};
++	
++	DEBUG_FUNC();
++
++	ha_info_lifetime = ntohs(ra->icmph.icmp6_rt_lifetime);
++	ipv6_addr_copy(&ll_addr, saddr);
++	
++	if (ndopts->nd_opts_hai) {
++		struct ha_info_opt *hai = (struct ha_info_opt *)ndopts->nd_opts_hai;
++		ha_info_pref = ntohs(hai->pref);
++		ha_info_lifetime = ntohs(hai->ltime);
++		DEBUG(DBG_DATADUMP,
++		      "received home agent info with preference : %d and lifetime : %d",
++		      ha_info_pref, ha_info_lifetime);
++	}
++	if (ndopts->nd_opts_pi) {
++		struct nd_opt_hdr *p;
++		for (p = ndopts->nd_opts_pi;
++		     p;
++		     p = ndisc_next_option(p, ndopts->nd_opts_pi_end)) {
++			struct prefix_info *pinfo;
++			
++			pinfo = (struct prefix_info *) p;
++			
++			if (pinfo->router_address) {
++				DEBUG(DBG_DATADUMP, "Adding router address to "
++				      "ha queue \n");
++				/* If RA has H bit set and Prefix Info
++				 * Option R bit set, queue this
++				 * address to be added to Home Agents
++				 * List.  
++				 */
++				if (ipv6_addr_type(&pinfo->prefix) &
++				    IPV6_ADDR_LINKLOCAL)
++					continue;
++				if (!ra->icmph.icmp6_home_agent || !ha_info_lifetime) {
++					mipv6_halist_delete(&pinfo->prefix); 
++					continue;
++				} else {
++					
++					mipv6_halist_add(ifi, &pinfo->prefix, 
++							 pinfo->prefix_len, &ll_addr, 
++							 ha_info_pref, ha_info_lifetime);
++				} 
++				
++			}
++			
++		}
++	}
++	return MIPV6_ADD_RTR;
++}
++
++/**********************************************************************
++ *
++ * MIPv6 Module Init / Cleanup
++ *
++ **********************************************************************/
++
++#ifdef CONFIG_SYSCTL
++/* Sysctl table */
++extern int 
++mipv6_max_tnls_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++extern int 
++mipv6_min_tnls_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++int max_adv = ~(u16)0;
++int min_zero = 0;
++ctl_table mipv6_mobility_table[] = {
++	{NET_IPV6_MOBILITY_BINDING_REFRESH, "binding_refresh_advice",
++	 &mip6node_cnf.binding_refresh_advice, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_adv},
++
++	{NET_IPV6_MOBILITY_MAX_TNLS, "max_tnls", &mipv6_max_tnls, sizeof(int),
++	 0644, NULL, &mipv6_max_tnls_sysctl},
++	{NET_IPV6_MOBILITY_MIN_TNLS, "min_tnls", &mipv6_min_tnls, sizeof(int),
++	 0644, NULL, &mipv6_min_tnls_sysctl},
++	{0}
++};
++ctl_table mipv6_table[] = {
++	{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, mipv6_mobility_table},
++	{0}
++};
++
++static struct ctl_table_header *mipv6_sysctl_header;
++static struct ctl_table mipv6_net_table[];
++static struct ctl_table mipv6_root_table[];
++
++ctl_table mipv6_net_table[] = {
++	{NET_IPV6, "ipv6", NULL, 0, 0555, mipv6_table},
++	{0}
++};
++
++ctl_table mipv6_root_table[] = {
++	{CTL_NET, "net", NULL, 0, 0555, mipv6_net_table},
++	{0}
++};
++#endif /* CONFIG_SYSCTL */
++
++extern void mipv6_check_dad(struct in6_addr *haddr);
++extern void mipv6_dad_init(void);
++extern void mipv6_dad_exit(void);
++extern int mipv6_forward(struct sk_buff *);
++
++/*  Initialize the module  */
++static int __init mip6_ha_init(void)
++{
++	int err = 0;
++
++	printk(KERN_INFO "MIPL Mobile IPv6 for Linux Home Agent %s (%s)\n",
++	       MIPLVERSION, MIPV6VERSION);
++	mip6node_cnf.capabilities = CAP_CN | CAP_HA;
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_dhaad_req_rcv = mipv6_icmpv6_rcv_dhaad_req;
++	mip6_fn.icmpv6_pfxadv_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_pfxsol_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_paramprob_rcv = mipv6_icmpv6_no_rcv;
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++	printk(KERN_INFO "Debug-level: %d\n", mipv6_debug);
++#endif
++
++#ifdef CONFIG_SYSCTL
++	mipv6_sysctl_header = register_sysctl_table(mipv6_root_table, 0);
++#endif
++	mipv6_initialize_tunnel();
++
++	if ((err = mipv6_ha_init()) < 0)
++		goto ha_fail;
++
++	MIPV6_SETCALL(mipv6_ra_rcv, mipv6_ha_ra_rcv);
++	MIPV6_SETCALL(mipv6_forward, mipv6_forward);
++	mipv6_dad_init();
++	MIPV6_SETCALL(mipv6_check_dad, mipv6_check_dad);
++
++	if ((err = mipv6_halist_init(MIPV6_HALIST_SIZE)) < 0)
++		goto halist_fail;
++
++//	mipv6_initialize_pfx_icmpv6();
++
++	return 0;
++
++halist_fail:
++	mipv6_dad_exit();
++	mipv6_ha_exit();
++ha_fail:
++	mipv6_shutdown_tunnel();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	MIPV6_RESETCALL(mipv6_ra_rcv);
++	MIPV6_RESETCALL(mipv6_forward);
++	MIPV6_RESETCALL(mipv6_check_dad);
++
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++	return err;
++}
++module_init(mip6_ha_init);
++
++#ifdef MODULE
++/*  Cleanup module  */
++static void __exit mip6_ha_exit(void)
++{
++	printk(KERN_INFO "mip6_ha.o exiting.\n");
++	mip6node_cnf.capabilities &= ~(int)CAP_HA;
++
++	mipv6_bcache_cleanup(HOME_REGISTRATION);
++
++	MIPV6_RESETCALL(mipv6_ra_rcv);
++	MIPV6_RESETCALL(mipv6_forward);
++	MIPV6_RESETCALL(mipv6_check_dad);
++
++	mipv6_halist_exit();
++//	mipv6_shutdown_pfx_icmpv6();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	mipv6_dad_exit();
++	mipv6_ha_exit();
++	mipv6_shutdown_tunnel();
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++}
++module_exit(mip6_ha_exit);
++#endif /* MODULE */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/module_mn.c linux-2.4.25/net/ipv6/mobile_ip6/module_mn.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/module_mn.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/module_mn.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,188 @@
++/*
++ *	Mobile IPv6 Mobile Node Module
++ *
++ *	Authors:
++ *	Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *	Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License
++ *	as published by the Free Software Foundation; either version
++ *	2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/init.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/mipglue.h>
++
++extern int mipv6_debug;
++int mipv6_use_auth = 0;
++
++#if defined(MODULE) && LINUX_VERSION_CODE > 0x20115
++MODULE_AUTHOR("MIPL Team");
++MODULE_DESCRIPTION("Mobile IPv6 Mobile Node");
++MODULE_LICENSE("GPL");
++MODULE_PARM(mipv6_debug, "i");
++#endif
++
++#include "config.h"
++
++#include "mobhdr.h"
++#include "mn.h"
++#include "mipv6_icmp.h"
++//#include "prefix.h"
++
++/* TODO: These will go as soon as we get rid of the last two ioctls */
++extern int mipv6_ioctl_mn_init(void);
++extern void mipv6_ioctl_mn_exit(void);
++
++/**********************************************************************
++ *
++ * MIPv6 Module Init / Cleanup
++ *
++ **********************************************************************/
++
++#ifdef CONFIG_SYSCTL
++/* Sysctl table */
++
++extern int max_rtr_reach_time;
++extern int eager_cell_switching;
++
++static int max_reach = 1000;
++static int min_reach = 1;
++static int max_one = 1;
++static int min_zero = 0;
++
++extern int 
++mipv6_mdetect_mech_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++extern int 
++mipv6_router_reach_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++ctl_table mipv6_mobility_table[] = {
++	{NET_IPV6_MOBILITY_BU_F_LLADDR, "bu_flag_lladdr",
++	 &mip6node_cnf.bu_lladdr, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++	{NET_IPV6_MOBILITY_BU_F_KEYMGM, "bu_flag_keymgm",
++	 &mip6node_cnf.bu_keymgm, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++	{NET_IPV6_MOBILITY_BU_F_CN_ACK, "bu_flag_cn_ack",
++	 &mip6node_cnf.bu_cn_ack, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++
++	{NET_IPV6_MOBILITY_ROUTER_REACH, "max_router_reachable_time",
++	 &max_rtr_reach_time, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_reach, &max_reach},
++
++	{NET_IPV6_MOBILITY_MDETECT_MECHANISM, "eager_cell_switching",
++	 &eager_cell_switching, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++
++	{0}
++};
++ctl_table mipv6_table[] = {
++	{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, mipv6_mobility_table},
++	{0}
++};
++
++static struct ctl_table_header *mipv6_sysctl_header;
++static struct ctl_table mipv6_net_table[];
++static struct ctl_table mipv6_root_table[];
++
++ctl_table mipv6_net_table[] = {
++	{NET_IPV6, "ipv6", NULL, 0, 0555, mipv6_table},
++	{0}
++};
++
++ctl_table mipv6_root_table[] = {
++	{CTL_NET, "net", NULL, 0, 0555, mipv6_net_table},
++	{0}
++};
++#endif /* CONFIG_SYSCTL */
++
++/*  Initialize the module  */
++static int __init mip6_mn_init(void)
++{
++	int err = 0;
++
++	printk(KERN_INFO "MIPL Mobile IPv6 for Linux Mobile Node %s (%s)\n",
++	       MIPLVERSION, MIPV6VERSION);
++	mip6node_cnf.capabilities = CAP_CN | CAP_MN;
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++	printk(KERN_INFO "Debug-level: %d\n", mipv6_debug);
++#endif
++
++#ifdef CONFIG_SYSCTL
++	mipv6_sysctl_header = register_sysctl_table(mipv6_root_table, 0);
++#endif
++	if ((err = mipv6_mn_init()) < 0)
++		goto mn_fail;
++
++	mipv6_mh_mn_init();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = mipv6_icmpv6_rcv_dhaad_rep;
++	mip6_fn.icmpv6_dhaad_req_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_pfxadv_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_pfxsol_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_paramprob_rcv = mipv6_icmpv6_rcv_paramprob;
++
++//	mipv6_initialize_pfx_icmpv6();
++
++	if ((err = mipv6_ioctl_mn_init()) < 0)
++		goto ioctl_fail;
++
++	return 0;
++
++ioctl_fail:
++//	mipv6_shutdown_pfx_icmpv6();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	mipv6_mh_mn_exit();
++	mipv6_mn_exit();
++mn_fail:
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++	return err;
++}
++module_init(mip6_mn_init);
++
++#ifdef MODULE
++/*  Cleanup module  */
++static void __exit mip6_mn_exit(void)
++{
++	printk(KERN_INFO "mip6_mn.o exiting.\n");
++	mip6node_cnf.capabilities &= ~(int)CAP_MN;
++
++	mipv6_ioctl_mn_exit();
++//	mipv6_shutdown_pfx_icmpv6();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	mipv6_mn_exit();
++
++/* common cleanup */
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++}
++module_exit(mip6_mn_exit);
++#endif /* MODULE */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/multiaccess_ctl.c linux-2.4.25/net/ipv6/mobile_ip6/multiaccess_ctl.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/multiaccess_ctl.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/multiaccess_ctl.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,287 @@
++/*  
++ * 2001 (c) Oy L M Ericsson Ab
++ *
++ * Author: NomadicLab / Ericsson Research <ipv6@nomadiclab.com>
++ *
++ * $Id$
++ *
++ */
++
++/*
++ * Vertical hand-off information manager
++ */
++
++#include <linux/netdevice.h>
++#include <linux/in6.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/proc_fs.h>
++#include <linux/string.h>
++#include <linux/kernel.h>
++#include <asm/io.h>
++#include <asm/uaccess.h>
++#include <linux/list.h>
++#include "multiaccess_ctl.h"
++#include "debug.h"
++
++/*
++ * Local variables
++ */
++static LIST_HEAD(if_list);
++
++/* Internal interface information list */
++struct ma_if_info {
++	struct list_head list;
++	int        interface_id;
++	int        preference;
++	__u8       status;
++};
++
++/**
++ * ma_ctl_get_preference - get preference value for interface
++ * @ifi: interface index
++ * 
++ * Returns integer value preference for given interface.
++ **/
++int ma_ctl_get_preference(int ifi)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++	int pref = 0;
++
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == ifi) {
++			pref = info->preference;
++			return pref;
++		}
++	}
++	return -1;
++}
++/**
++ * ma_ctl_get_preference - get preference value for interface
++ * @ifi: interface index
++ * 
++ * Returns integer value interface index for interface with highest preference.
++ **/
++int ma_ctl_get_preferred_if(void)
++{
++	struct list_head *lh;
++	struct ma_if_info *info, *pref_if = NULL;
++	
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (!pref_if || (info->preference > pref_if->preference)) {
++			pref_if = info;
++		}
++	}
++	if (pref_if) return pref_if->interface_id;
++	return 0;
++}
++/**
++ * ma_ctl_set_preference - set preference for interface
++ * @arg: ioctl args
++ *
++ * Sets preference of an existing interface (called by ioctl).
++ **/
++void ma_ctl_set_preference(unsigned long arg)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++	struct ma_if_uinfo uinfo;
++	
++	memset(&uinfo, 0, sizeof(struct ma_if_uinfo));
++	if (copy_from_user(&uinfo, (struct ma_if_uinfo *)arg, 
++			   sizeof(struct ma_if_uinfo)) < 0) {
++		DEBUG(DBG_WARNING, "copy_from_user failed");
++		return;
++	}
++
++	/* check if the interface exists */
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == uinfo.interface_id) {
++			info->preference = uinfo.preference;
++			return;
++		}
++	}
++}
++
++/**
++ * ma_ctl_add_iface - add new interface to list
++ * @if_index: interface index
++ *
++ * Adds new interface entry to preference list.  Preference is set to
++ * the same value as @if_index.  Entry @status is set to
++ * %MA_IFACE_NOT_USED.
++ **/
++void ma_ctl_add_iface(int if_index)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++
++	DEBUG_FUNC();
++	
++	/* check if the interface already exists */
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == if_index) {
++			info->status = MA_IFACE_NOT_USED;
++			info->preference = if_index;
++			return;
++		}
++	}
++
++	info = kmalloc(sizeof(struct ma_if_info), GFP_ATOMIC);
++	if (info == NULL) {
++		DEBUG(DBG_ERROR, "Out of memory");
++		return;
++	}
++	memset(info, 0, sizeof(struct ma_if_info));
++	info->interface_id = if_index;
++	info->preference = if_index;
++	info->status = MA_IFACE_NOT_USED;
++	list_add(&info->list, &if_list);
++}
++
++/**
++ * ma_ctl_del_iface - remove entry from the list
++ * @if_index: interface index
++ *
++ * Removes entry for interface @if_index from preference list.
++ **/
++int ma_ctl_del_iface(int if_index)
++{
++	struct list_head *lh, *next;
++	struct ma_if_info *info;
++
++	DEBUG_FUNC();
++
++	/* if the iface exists, change availability to 0 */
++	list_for_each_safe(lh, next, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == if_index) {
++			list_del(&info->list);
++			kfree(info);
++			return 0;
++		}
++	}
++
++	return -1;
++}
++
++/**
++ * ma_ctl_upd_iface - update entry (and list)
++ * @if_index: interface to update
++ * @status: new status for interface
++ * @change_if_index: new interface
++ *
++ * Updates @if_index entry on preference list.  Entry status is set to
++ * @status.  If new @status is %MA_IFACE_CURRENT, updates list to have
++ * only one current device.  If @status is %MA_IFACE_NOT_PRESENT,
++ * entry is deleted and further if entry had %MA_IFACE_CURRENT set,
++ * new current device is looked up and returned in @change_if_index.
++ * New preferred interface is also returned if current device changes
++ * to %MA_IFACE_NOT_USED.  Returns 0 on success, otherwise negative.
++ **/
++int ma_ctl_upd_iface(int if_index, int status, int *change_if_index)
++{
++	struct list_head *lh, *tmp;
++	struct ma_if_info *info, *pref = NULL;
++	int found = 0;
++
++	DEBUG_FUNC();
++
++	*change_if_index = 0;
++
++	/* check if the interface exists */
++	list_for_each_safe(lh, tmp, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (status == MA_IFACE_NOT_PRESENT) {
++			if (info->interface_id == if_index) {
++				list_del_init(&info->list);
++				kfree(info);
++				found = 1;
++				break;
++			}
++		} else if (status == MA_IFACE_CURRENT) {
++			if (info->interface_id == if_index) {
++				info->status |= MA_IFACE_CURRENT;
++				found = 1;
++			} else {
++				info->status |= MA_IFACE_NOT_USED;
++			}
++		} else if (status == MA_IFACE_NOT_USED) {
++			if (info->interface_id == if_index) {
++				if (info->status | MA_IFACE_CURRENT) {
++					found = 1;
++				}
++				info->status &= !MA_IFACE_CURRENT;
++				info->status |= MA_IFACE_NOT_USED;
++				info->status &= !MA_IFACE_HAS_ROUTER;
++			}
++			break;
++		} else if (status == MA_IFACE_HAS_ROUTER) {
++			if (info->interface_id == if_index) {
++				info->status |= MA_IFACE_HAS_ROUTER;
++			}
++			return 0;
++		}
++	}
++
++	if (status & (MA_IFACE_NOT_USED|MA_IFACE_NOT_PRESENT) && found) {
++		/* select new interface */
++		list_for_each(lh, &if_list) {
++			info = list_entry(lh, struct ma_if_info, list);
++			if (pref == NULL || ((info->preference > pref->preference) && 
++					     info->status & MA_IFACE_HAS_ROUTER))
++				pref = info;
++		}
++		if (pref) {
++			*change_if_index = pref->interface_id;
++			pref->status |= MA_IFACE_CURRENT;
++		} else {
++			*change_if_index = -1;
++		}
++		return 0;
++	}
++
++	if (found) return 0;
++
++	return -1;
++}
++
++static int if_proc_info(char *buffer, char **start, off_t offset,
++			int length)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++	int len = 0;
++
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		len += sprintf(buffer + len, "%02d %010d %1d %1d\n",
++			       info->interface_id, info->preference,
++			       !!(info->status & MA_IFACE_HAS_ROUTER),
++			       !!(info->status & MA_IFACE_CURRENT));
++	}
++
++	*start = buffer + offset;
++
++	len -= offset;
++
++	if (len > length) len = length;
++
++	return len;
++
++}
++
++void ma_ctl_init(void)
++{
++	proc_net_create("mip6_iface", 0, if_proc_info);
++}
++
++void ma_ctl_clean(void)
++{
++	proc_net_remove("mip6_iface");
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/multiaccess_ctl.h linux-2.4.25/net/ipv6/mobile_ip6/multiaccess_ctl.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/multiaccess_ctl.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/multiaccess_ctl.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,77 @@
++/*  
++ * 2001 (c) Oy L M Ericsson Ab
++ *
++ * Author: NomadicLab / Ericsson Research <ipv6@nomadiclab.com>
++ *
++ * $Id$
++ *
++ */
++
++#ifndef _MULTIACCESS_CTL_H
++#define _MULTIACCESS_CTL_H
++
++/* status */
++#define MA_IFACE_NOT_PRESENT 0x01
++#define MA_IFACE_NOT_USED    0x02
++#define MA_IFACE_HAS_ROUTER  0x04
++#define MA_IFACE_CURRENT     0x10
++
++struct ma_if_uinfo {
++	int        interface_id;
++	int        preference;
++	__u8       status;
++};
++/*
++ *  @ma_ctl_get_preferred_id: returns most preferred interface id
++ */
++int ma_ctl_get_preferred_if(void);
++
++/* @ma_ctl_get_preference: returns preference for an interface
++ * @name: name of the interface (dev->name)
++ */
++int ma_ctl_get_preference(int ifi);
++
++/*
++ * Public function: ma_ctl_set_preference
++ * Description: Set preference of an existing interface (called by ioctl)
++ * Returns:
++ */
++void ma_ctl_set_preference(unsigned long);
++
++/*
++ * Public function: ma_ctl_add_iface
++ * Description: Inform control module to insert a new interface
++ * Returns: 0 if success, any other number means an error
++ */
++void ma_ctl_add_iface(int);
++
++/*
++ * Public function: ma_ctl_del_iface
++ * Description: Inform control module to remove an obsolete interface
++ * Returns: 0 if success, any other number means an error
++ */
++int ma_ctl_del_iface(int);
++
++/*
++ * Public function: ma_ctl_upd_iface
++ * Description: Inform control module of status change.
++ * Returns: 0 if success, any other number means an error
++ */
++int ma_ctl_upd_iface(int, int, int *);
++
++/*
++ * Public function: ma_ctl_init
++ * Description: XXX
++ * Returns: XXX
++ */
++void ma_ctl_init(void);
++
++/*
++ * Public function: ma_ctl_clean
++ * Description: XXX
++ * Returns: -
++ */
++void ma_ctl_clean(void);
++
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/ndisc_ha.c linux-2.4.25/net/ipv6/mobile_ip6/ndisc_ha.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/ndisc_ha.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/ndisc_ha.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,596 @@
++/*
++ *	Mobile IPv6 Duplicate Address Detection Functions
++ *
++ *	Authors:
++ *	Krishna Kumar <krkumar@us.ibm.com>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/autoconf.h>
++#include <linux/types.h>
++#include <linux/init.h>
++#include <linux/skbuff.h>
++#include <linux/in6.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "debug.h"
++#include "bcache.h"
++#include "ha.h" /* mipv6_generate_ll_addr */
++
++/*
++ * Binding Updates from MN are cached in this structure till DAD is performed.
++ * This structure is used to retrieve a pending Binding Update for the HA to
++ * reply to after performing DAD. The first cell is different from the rest as
++ * follows :
++ * 	1. The first cell is used to chain the remaining cells. 
++ *	2. The timeout of the first cell is used to delete expired entries
++ *	   in the list of cells, while the timeout of the other cells are
++ *	   used for timing out a NS request so as to reply to a BU.
++ *	3. The only elements of the first cell that are used are :
++ *	   next, prev, and callback_timer.
++ *
++ * TODO : Don't we need to do pneigh_lookup on the Link Local address ?
++ */
++struct mipv6_dad_cell {
++	/* Information needed for DAD management */
++	struct mipv6_dad_cell	*next;	/* Next element on the DAD list */
++	struct mipv6_dad_cell	*prev;	/* Prev element on the DAD list */
++	__u16			probes;	/* Number of times to probe for addr */
++	__u16			flags;	/* Entry flags - see below */
++	struct timer_list	callback_timer; /* timeout for entry */
++
++	/* Information needed for performing DAD */
++	struct inet6_ifaddr	*ifp;
++	int			ifindex;
++	struct in6_addr		daddr;
++	struct in6_addr		haddr;		/* home address */
++	struct in6_addr		ll_haddr;	/* Link Local value of haddr */
++	struct in6_addr		coa;
++	struct in6_addr         rep_coa;
++	__u32			ba_lifetime;
++	__u16			sequence;
++	__u8			bu_flags;
++};
++
++/* Values for the 'flags' field in the mipv6_dad_cell */
++#define	DAD_INIT_ENTRY		0
++#define	DAD_DUPLICATE_ADDRESS	1
++#define	DAD_UNIQUE_ADDRESS	2
++
++/* Head of the pending DAD list */
++static struct mipv6_dad_cell dad_cell_head;
++
++/* Lock to access the pending DAD list */
++static rwlock_t dad_lock = RW_LOCK_UNLOCKED;
++
++/* Timer routine which deletes 'expired' entries in the DAD list */
++static void mipv6_dad_delete_old_entries(unsigned long unused)
++{
++	struct mipv6_dad_cell *curr, *next;
++	unsigned long next_time = 0;
++
++	write_lock(&dad_lock);
++	curr = dad_cell_head.next;
++	while (curr != &dad_cell_head) {
++		next = curr->next;
++		if (curr->flags != DAD_INIT_ENTRY) {
++			if (curr->callback_timer.expires <= jiffies) {
++				/* Entry has expired, free it up. */
++				curr->next->prev = curr->prev;
++				curr->prev->next = curr->next;
++				in6_ifa_put(curr->ifp);
++				kfree(curr);
++			} else if (next_time <
++				   curr->callback_timer.expires) {
++				next_time = curr->callback_timer.expires;
++			}
++		}
++		curr = next;
++	}
++	write_unlock(&dad_lock);
++	if (next_time) {
++		/*
++		 * Start another timer if more cells need to be removed at
++		 * a later stage.
++		 */
++		dad_cell_head.callback_timer.expires = next_time;
++		add_timer(&dad_cell_head.callback_timer);
++	}
++}
++
++/* 
++ * Queue a timeout routine to clean up 'expired' DAD entries.
++ */
++static void mipv6_start_dad_head_timer(struct mipv6_dad_cell *cell)
++{
++	unsigned long expire = jiffies +
++	    cell->ifp->idev->nd_parms->retrans_time * 10;
++
++	if (!timer_pending(&dad_cell_head.callback_timer) ||
++	    expire < dad_cell_head.callback_timer.expires) {
++		/*
++		 * Add timer if none pending, or mod the timer if new 
++		 * cell needs to be expired before existing timer runs.
++		 *
++		 * We let the cell remain as long as possible, so that
++		 * new BU's as part of retransmissions don't have to go
++		 * through DAD before replying.
++		 */
++		dad_cell_head.callback_timer.expires = expire;
++
++		/*
++		 * Keep the cell around for atleast some time to handle
++		 * retransmissions or BU's due to fast MN movement. This
++		 * is needed otherwise a previous timeout can delete all
++		 * expired entries including this new one.
++		 */
++		cell->callback_timer.expires = jiffies +
++		    cell->ifp->idev->nd_parms->retrans_time * 5;
++		if (!timer_pending(&dad_cell_head.callback_timer)) {
++			add_timer(&dad_cell_head.callback_timer);
++		} else {
++			mod_timer(&dad_cell_head.callback_timer, expire);
++		}
++	}
++}
++
++
++/* Join solicited node MC address */
++static inline void mipv6_join_sol_mc_addr(struct in6_addr *addr,
++					  struct net_device *dev)
++{
++	struct in6_addr maddr;
++
++	/* Join solicited node MC address */
++	addrconf_addr_solict_mult(addr, &maddr);
++	ipv6_dev_mc_inc(dev, &maddr);
++}
++
++/* Leave solicited node MC address */
++static inline void mipv6_leave_sol_mc_addr(struct in6_addr *addr,
++					   struct net_device *dev)
++{
++	struct in6_addr maddr;
++
++	addrconf_addr_solict_mult(addr, &maddr);
++	ipv6_dev_mc_dec(dev, &maddr);
++}
++
++/* Send a NS */
++static inline void mipv6_dad_send_ns(struct inet6_ifaddr *ifp,
++				     struct in6_addr *haddr)
++{
++	struct in6_addr unspec;
++	struct in6_addr mcaddr;
++
++	ipv6_addr_set(&unspec, 0, 0, 0, 0);
++	addrconf_addr_solict_mult(haddr, &mcaddr);
++
++	/* addr is 'unspec' since we treat this address as transient */
++	ndisc_send_ns(ifp->idev->dev, NULL, haddr, &mcaddr, &unspec);
++}
++
++/*
++ * Search for a home address in the list of pending DAD's. Called from
++ * Neighbor Advertisement
++ * Return values :
++ * 	-1 : No DAD entry found for this advertisement, or entry already
++ *	     finished processing.
++ *	0  : Entry found waiting for DAD to finish.
++ */
++static int dad_search_haddr(struct in6_addr *ll_haddr,
++			    struct in6_addr *daddr, struct in6_addr *haddr,
++			    struct in6_addr *coa, struct in6_addr *rep_coa,
++			    __u16 * seq, struct inet6_ifaddr **ifp)
++{
++	struct mipv6_dad_cell *cell;
++
++	read_lock(&dad_lock);
++	cell = dad_cell_head.next;
++	while (cell != &dad_cell_head &&
++	       ipv6_addr_cmp(&cell->ll_haddr, ll_haddr) && 
++	       ipv6_addr_cmp(&cell->haddr, ll_haddr)) {
++		cell = cell->next;
++	}
++	if (cell == &dad_cell_head || cell->flags != DAD_INIT_ENTRY) {
++		/* Not found element, or element already finished processing */
++		if (cell != &dad_cell_head) {
++			/*
++			 * Set the state to DUPLICATE, even if it was UNIQUE
++			 * earlier. It is not needed to setup timer via 
++			 * mipv6_start_dad_head_timer since this must have
++			 * already been done.
++			 */
++			cell->flags = DAD_DUPLICATE_ADDRESS;
++		}
++		read_unlock(&dad_lock);
++		return -1;
++	}
++
++	/*
++	 * The NA found an unprocessed entry in the DAD list. Expire this
++	 * entry since another node advertised this address. Caller should
++	 * reject BU (DAD failed).
++	 */
++	ipv6_addr_copy(daddr, &cell->daddr);
++	ipv6_addr_copy(haddr, &cell->haddr);
++	ipv6_addr_copy(coa, &cell->coa);
++	ipv6_addr_copy(rep_coa, &cell->rep_coa);
++	*seq = cell->sequence;
++	*ifp = cell->ifp;
++
++	if (del_timer(&cell->callback_timer) == 0) {
++		/* Timer already deleted, race with Timeout Handler */
++		/* No action needed */
++	}
++
++	cell->flags = DAD_DUPLICATE_ADDRESS;
++
++	/* Now leave this address to avoid future processing of NA's */
++	mipv6_leave_sol_mc_addr(&cell->ll_haddr, cell->ifp->idev->dev);
++	/* Leave also global address, if link local address was in use */
++	if (ipv6_addr_cmp(&cell->ll_haddr, &cell->haddr))
++	    	mipv6_leave_sol_mc_addr(&cell->haddr, cell->ifp->idev->dev);
++	/* Start dad_head timer to remove this entry */
++	mipv6_start_dad_head_timer(cell);
++
++	read_unlock(&dad_lock);
++
++	return 0;
++}
++
++/* ENTRY routine called via Neighbor Advertisement */
++void mipv6_check_dad(struct in6_addr *ll_haddr)
++{
++	struct in6_addr daddr, haddr, coa, rep_coa;
++	struct inet6_ifaddr *ifp;
++	__u16 seq;
++
++	if (dad_search_haddr(ll_haddr, &daddr, &haddr, &coa, &rep_coa, &seq,
++			     &ifp) < 0) {
++		/* 
++		 * Didn't find entry, or no action needed (the action has
++		 * already been performed).
++		 */
++		return;
++	}
++
++	/*
++	 * A DAD cell was present, meaning that there is a pending BU
++	 * request for 'haddr' - reject the BU.
++	 */
++	mipv6_bu_finish(ifp, 0, DUPLICATE_ADDR_DETECT_FAIL,
++			&daddr, &haddr, &coa, &rep_coa, 0, seq, 0, NULL);
++	return;
++}
++
++/*
++ * Check if the passed 'cell' is in the list of pending DAD's. Called from
++ * the Timeout Handler.
++ *
++ * Assumes that the caller is holding the dad_lock in reader mode.
++ */
++static int dad_search_cell(struct mipv6_dad_cell *cell)
++{
++	struct mipv6_dad_cell *tmp;
++
++	tmp = dad_cell_head.next;
++	while (tmp != &dad_cell_head && tmp != cell) {
++		tmp = tmp->next;
++	}
++	if (tmp == cell) {
++		if (cell->flags == DAD_INIT_ENTRY) {
++			/* Found valid entry */
++			if (--cell->probes == 0) {
++				/*
++				 * Retransmission's are over - return success.
++				 */
++				cell->flags = DAD_UNIQUE_ADDRESS;
++
++				/* 
++				 * Leave this address to avoid future 
++				 * processing of NA's.
++				 */
++				mipv6_leave_sol_mc_addr(&cell->ll_haddr,
++							cell->ifp->idev->
++							dev);
++				if (ipv6_addr_cmp(&cell->ll_haddr, &cell->haddr))
++					mipv6_leave_sol_mc_addr(&cell->haddr, 
++								cell->ifp->idev->dev);
++				/* start timeout to delete this cell. */
++				mipv6_start_dad_head_timer(cell);
++				return 0;
++			}
++			/*
++			 * Retransmission not finished, send another NS and
++			 * return failure.
++			 */
++			mipv6_dad_send_ns(cell->ifp, &cell->ll_haddr);
++			if (ipv6_addr_cmp(&cell->ll_haddr, &cell->haddr))
++				mipv6_leave_sol_mc_addr(&cell->haddr, 
++							cell->ifp->idev->dev);
++			cell->callback_timer.expires = jiffies +
++			    cell->ifp->idev->nd_parms->retrans_time;
++			add_timer(&cell->callback_timer);
++		} else {
++			/*
++			 * This means that an NA was received before the
++			 * timeout and when the state changed from
++			 * DAD_INIT_ENTRY, the BU got failed as a result.
++			 * There is nothing to be done.
++			 */
++		}
++	}
++	return -1;
++}
++
++/* ENTRY routine called via Timeout */
++static void mipv6_dad_timeout(unsigned long arg)
++{
++	__u8 ba_status = SUCCESS;
++	struct in6_addr daddr;
++	struct in6_addr haddr;
++	struct in6_addr coa;
++	struct in6_addr rep_coa;
++	struct inet6_ifaddr *ifp;
++	int ifindex;
++	__u32 ba_lifetime;
++	__u16 sequence;
++	__u8 flags;
++	struct mipv6_dad_cell *cell = (struct mipv6_dad_cell *) arg;
++
++	/*
++	 * If entry is not in the list, we have already sent BU Failure
++	 * after getting a NA.
++	 */
++	read_lock(&dad_lock);
++	if (dad_search_cell(cell) < 0) {
++		/*
++		 * 'cell' is no longer valid (may not be in the list or
++		 * is already processed, due to NA processing), or NS
++		 * retransmissions are not yet over.
++		 */
++		read_unlock(&dad_lock);
++		return;
++	}
++
++	/* This is the final Timeout. Send Bind Ack Success */
++
++	ifp = cell->ifp;
++	ifindex = cell->ifindex;
++	ba_lifetime = cell->ba_lifetime;
++	sequence = cell->sequence;
++	flags = cell->bu_flags;
++
++	ipv6_addr_copy(&daddr, &cell->daddr);
++	ipv6_addr_copy(&haddr, &cell->haddr);
++	ipv6_addr_copy(&coa, &cell->coa);
++	ipv6_addr_copy(&rep_coa, &cell->rep_coa);
++	read_unlock(&dad_lock);
++
++	/* Send BU Acknowledgement Success */
++	mipv6_bu_finish(ifp, ifindex, ba_status, 
++			&daddr, &haddr, &coa, &rep_coa,
++			ba_lifetime, sequence, flags, NULL);
++	return;
++}
++
++/*
++ * Check if original home address exists in our DAD pending list, if so return
++ * the cell.
++ *
++ * Assumes that the caller is holding the dad_lock in writer mode.
++ */
++static struct mipv6_dad_cell *mipv6_dad_get_cell(struct in6_addr *haddr)
++{
++	struct mipv6_dad_cell *cell;
++
++	cell = dad_cell_head.next;
++	while (cell != &dad_cell_head
++	       && ipv6_addr_cmp(&cell->haddr, haddr)) {
++		cell = cell->next;
++	}
++	if (cell == &dad_cell_head) {
++		/* Not found element */
++		return NULL;
++	}
++	return cell;
++}
++
++/*
++ * Save all parameters needed for doing a Bind Ack in the mipv6_dad_cell 
++ * structure.
++ */
++static void mipv6_dad_save_cell(struct mipv6_dad_cell *cell,
++				struct inet6_ifaddr *ifp, int ifindex,
++				struct in6_addr *daddr,
++				struct in6_addr *haddr,
++				struct in6_addr *coa, 
++				struct in6_addr *rep_coa,
++				__u32 ba_lifetime,
++				__u16 sequence, __u8 flags)
++{
++	in6_ifa_hold(ifp);
++	cell->ifp = ifp;
++	cell->ifindex = ifindex;
++
++	ipv6_addr_copy(&cell->daddr, daddr);
++	ipv6_addr_copy(&cell->haddr, haddr);
++	ipv6_addr_copy(&cell->coa, coa);
++	ipv6_addr_copy(&cell->rep_coa, rep_coa);
++
++	/* Convert cell->ll_haddr to Link Local address */
++	if (flags & MIPV6_BU_F_LLADDR) 
++		mipv6_generate_ll_addr(&cell->ll_haddr, haddr);
++	else 
++		ipv6_addr_copy(&cell->ll_haddr, haddr);
++
++	cell->ba_lifetime = ba_lifetime;
++	cell->sequence = sequence;
++	cell->bu_flags = flags;
++}
++
++/*
++ * Top level DAD routine for performing DAD.
++ *
++ * Return values
++ *	0     : Don't need to do DAD.
++ *	1     : Need to do DAD.
++ *	-n    : Error, where 'n' is the reason for the error.
++ *
++ * Assumption : DAD process has been optimized by using cached values upto
++ * some time. However sometimes this can cause problems. Eg. when the first
++ * BU was received, DAD might have failed. Before the second BU arrived,
++ * the node using MN's home address might have stopped using it, but still
++ * we will return DAD_DUPLICATE_ADDRESS based on the first DAD's result. Or 
++ * this can go the other way around. However, it is a very small possibility
++ * and thus optimization is turned on by default. It is possible to change
++ * this feature (needs a little code-rewriting in this routine), but 
++ * currently DAD result is being cached for performance reasons.
++ */
++int mipv6_dad_start(struct inet6_ifaddr *ifp, int ifindex,
++		    struct in6_addr *daddr, struct in6_addr *haddr,
++		    struct in6_addr *coa, struct in6_addr *rep_coa,
++		    __u32 ba_lifetime, __u16 sequence, __u8 flags)
++{
++	int found;
++	struct mipv6_dad_cell *cell;
++	struct mipv6_bce bc_entry;
++
++	if (ifp->idev->cnf.dad_transmits == 0) {
++		/* DAD is not configured on the HA, return SUCCESS */
++		return 0;
++	}
++
++	if (mipv6_bcache_get(haddr, daddr, &bc_entry) == 0) {
++		/*
++		 * We already have an entry in our cache - don't need to 
++		 * do DAD as we are already defending this home address.
++		 */
++		return 0;
++	}
++
++	write_lock(&dad_lock);
++	if ((cell = mipv6_dad_get_cell(haddr)) != NULL) {
++		/*
++		 * An existing entry for BU was found in our cache due
++		 * to retransmission of the BU or a new COA registration.
++		 */
++		switch (cell->flags) {
++		case DAD_INIT_ENTRY:
++			/* Old entry is waiting for DAD to complete */
++			break;
++		case DAD_UNIQUE_ADDRESS:
++			/* DAD is finished successfully - return success. */
++			write_unlock(&dad_lock);
++			return 0;
++		case DAD_DUPLICATE_ADDRESS:
++			/*
++			 * DAD is finished and we got a NA while doing BU -
++			 * return failure.
++			 */
++			write_unlock(&dad_lock);
++			return -DUPLICATE_ADDR_DETECT_FAIL;
++		default:
++			/* Unknown state - should never happen */
++			DEBUG(DBG_WARNING,
++			      "cell entry in unknown state : %d",
++			      cell->flags);
++			write_unlock(&dad_lock);
++			return -REASON_UNSPECIFIED;
++		}
++		found = 1;
++	} else {
++		if ((cell = (struct mipv6_dad_cell *)
++		     kmalloc(sizeof(struct mipv6_dad_cell), GFP_ATOMIC))
++		    == NULL) {
++			return -INSUFFICIENT_RESOURCES;
++		}
++		found = 0;
++	}
++
++	mipv6_dad_save_cell(cell, ifp, ifindex, daddr, haddr, coa, rep_coa,
++			    ba_lifetime, sequence, flags);
++
++	if (!found) {
++		cell->flags = DAD_INIT_ENTRY;
++		cell->probes = ifp->idev->cnf.dad_transmits;
++
++		/* Insert element on dad_cell_head list */
++		dad_cell_head.prev->next = cell;
++		cell->next = &dad_cell_head;
++		cell->prev = dad_cell_head.prev;
++		dad_cell_head.prev = cell;
++		write_unlock(&dad_lock);
++		if (flags & MIPV6_BU_F_LLADDR) {
++			/* join the solicited node MC of the global homeaddr.*/
++			mipv6_join_sol_mc_addr(&cell->haddr, ifp->idev->dev);
++			/* Send a NS */
++			mipv6_dad_send_ns(ifp, &cell->haddr);
++		}
++		/* join the solicited node MC of the homeaddr. */
++		mipv6_join_sol_mc_addr(&cell->ll_haddr, ifp->idev->dev);
++		
++		/* Send a NS */
++		mipv6_dad_send_ns(ifp, &cell->ll_haddr);
++		
++		/* Initialize timer for this cell to timeout the NS. */
++		init_timer(&cell->callback_timer);
++		cell->callback_timer.data = (unsigned long) cell;
++		cell->callback_timer.function = mipv6_dad_timeout;
++		cell->callback_timer.expires = jiffies +
++		    ifp->idev->nd_parms->retrans_time;
++		add_timer(&cell->callback_timer);
++	} else {
++		write_unlock(&dad_lock);
++	}
++	return 1;
++}
++
++void __init mipv6_dad_init(void)
++{
++	dad_cell_head.next = dad_cell_head.prev = &dad_cell_head;
++	init_timer(&dad_cell_head.callback_timer);
++	dad_cell_head.callback_timer.data = 0;
++	dad_cell_head.callback_timer.function =
++		mipv6_dad_delete_old_entries;
++}
++
++void __exit mipv6_dad_exit(void)
++{
++	struct mipv6_dad_cell *curr, *next;
++
++	write_lock_bh(&dad_lock);
++	del_timer(&dad_cell_head.callback_timer);
++
++	curr = dad_cell_head.next;
++	while (curr != &dad_cell_head) {
++		next = curr->next;
++		del_timer(&curr->callback_timer);
++		if (curr->flags == DAD_INIT_ENTRY) {
++			/*
++			 * We were in DAD_INIT state and listening to the
++			 * solicited node MC address - need to stop that.
++			 */
++			mipv6_leave_sol_mc_addr(&curr->ll_haddr,
++						curr->ifp->idev->dev);
++			if (ipv6_addr_cmp(&curr->ll_haddr, &curr->haddr))
++				mipv6_leave_sol_mc_addr(&curr->haddr, 
++							curr->ifp->idev->dev);
++		}
++		in6_ifa_put(curr->ifp);
++		kfree(curr);
++		curr = next;
++	}
++	dad_cell_head.next = dad_cell_head.prev = &dad_cell_head;
++	write_unlock_bh(&dad_lock);
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/prefix.c linux-2.4.25/net/ipv6/mobile_ip6/prefix.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/prefix.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/prefix.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,217 @@
++/**
++ * Prefix solicitation and advertisement
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/icmpv6.h>
++#include <linux/net.h>
++#include <linux/spinlock.h>
++#include <linux/timer.h>
++#include <linux/netdevice.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "mipv6_icmp.h"
++#include "debug.h"
++#include "sortedlist.h"
++#include "prefix.h"
++#include "config.h"
++
++#define INFINITY 0xffffffff
++
++struct timer_list pfx_timer;
++
++struct list_head pfx_list;
++rwlock_t pfx_list_lock = RW_LOCK_UNLOCKED;
++
++int compare_pfx_list_entry(const void *data1, const void *data2,
++			   int datalen)
++{
++	struct pfx_list_entry *e1 = (struct pfx_list_entry *) data1;
++	struct pfx_list_entry *e2 = (struct pfx_list_entry *) data2;
++
++	return ((ipv6_addr_cmp(&e1->daddr, &e2->daddr) == 0)
++		&& (e2->ifindex == -1 || e1->ifindex == e2->ifindex));
++}
++
++/**
++ * mipv6_pfx_cancel_send - cancel pending items to daddr from saddr
++ * @daddr: Destination address
++ * @ifindex: pending items on this interface will be canceled
++ *
++ * if ifindex == -1, all items to daddr will be removed
++ */
++void mipv6_pfx_cancel_send(struct in6_addr *daddr, int ifindex)
++{
++	unsigned long tmp;
++	struct pfx_list_entry entry;
++
++	DEBUG_FUNC();
++
++	/* We'll just be comparing these parts... */
++	memcpy(&entry.daddr, daddr, sizeof(struct in6_addr));
++	entry.ifindex = ifindex;
++
++	write_lock_bh(&pfx_list_lock);
++
++	while (mipv6_slist_del_item(&pfx_list, &entry,
++				    compare_pfx_list_entry) == 0)
++		;
++
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++
++	write_unlock_bh(&pfx_list_lock);
++}
++
++/**
++ * mipv6_pfx_add_ha - add a new HA to send prefix solicitations to
++ * @daddr: address of HA
++ * @saddr: our address to use as source address
++ * @ifindex: interface index
++ */
++void mipv6_pfx_add_ha(struct in6_addr *daddr, struct in6_addr *saddr,
++		      int ifindex)
++{
++	unsigned long tmp;
++	struct pfx_list_entry entry;
++
++	DEBUG_FUNC();
++
++	memcpy(&entry.daddr, daddr, sizeof(struct in6_addr));
++	memcpy(&entry.saddr, saddr, sizeof(struct in6_addr));
++	entry.retries = 0;
++	entry.ifindex = ifindex;
++
++	write_lock_bh(&pfx_list_lock);
++	if (mipv6_slist_modify(&pfx_list, &entry, sizeof(struct pfx_list_entry),
++			       jiffies + INITIAL_SOLICIT_TIMER * HZ,
++			       compare_pfx_list_entry))
++		DEBUG(DBG_WARNING, "Cannot add new HA to pfx list");
++
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++	write_unlock_bh(&pfx_list_lock);
++}
++
++int mipv6_pfx_add_home(int ifindex, struct in6_addr *saddr, 
++		       struct in6_addr *daddr, unsigned long min_expire)
++{
++	unsigned long tmp;
++
++	write_lock(&pfx_list_lock);
++
++	if (min_expire != INFINITY) {
++		unsigned long expire;
++		struct pfx_list_entry entry;
++		
++		memcpy(&entry.daddr, saddr, sizeof(struct in6_addr));
++		memcpy(&entry.saddr, daddr, sizeof(struct in6_addr));
++		entry.retries = 0;
++		entry.ifindex = ifindex;
++
++		/* This is against the RFC 3775, but we need to set
++		 * a minimum interval for a prefix solicitation.
++		 * Otherwise a prefix solicitation storm will
++		 * result if valid lifetime of the prefix is
++		 * smaller than MAX_PFX_ADV_DELAY
++		 */
++		min_expire -= MAX_PFX_ADV_DELAY;
++		min_expire = min_expire < MIN_PFX_SOL_DELAY ? MIN_PFX_SOL_DELAY : min_expire;
++
++		expire = jiffies + min_expire * HZ;
++
++		if (mipv6_slist_modify(&pfx_list, &entry,
++				       sizeof(struct pfx_list_entry),
++				       expire,
++				       compare_pfx_list_entry) != 0)
++			DEBUG(DBG_WARNING, "Cannot add new entry to pfx_list");
++	}
++
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++
++	write_unlock(&pfx_list_lock);
++
++	return 0;
++}
++
++/**
++ * set_ha_pfx_list - manipulate pfx_list for HA when timer goes off
++ * @entry: pfx_list_entry that is due
++ */
++static void set_ha_pfx_list(struct pfx_list_entry *entry)
++{
++}
++
++/**
++ * set_mn_pfx_list - manipulate pfx_list for MN when timer goes off
++ * @entry: pfx_list_entry that is due
++ */
++static void set_mn_pfx_list(struct pfx_list_entry *entry)
++{
++}
++
++/**
++ * pfx_timer_handler - general timer handler
++ * @dummy: dummy
++ *
++ * calls set_ha_pfx_list and set_mn_pfx_list to do the thing when
++ * a timer goes off
++ */
++static void pfx_timer_handler(unsigned long dummy)
++{
++	unsigned long tmp;
++	struct pfx_list_entry *entry;
++
++	DEBUG_FUNC();
++
++	write_lock(&pfx_list_lock);
++	if (!(entry = mipv6_slist_get_first(&pfx_list)))
++		goto out;
++
++	if (mip6node_cnf.capabilities & CAP_HA)
++		set_ha_pfx_list(entry);
++	if (mip6node_cnf.capabilities & CAP_MN)
++		set_mn_pfx_list(entry);
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++
++ out:
++	write_unlock(&pfx_list_lock);
++}
++
++int mipv6_initialize_pfx_icmpv6(void)
++{
++	INIT_LIST_HEAD(&pfx_list);
++
++	init_timer(&pfx_timer);
++	pfx_timer.function = pfx_timer_handler;
++
++	return 0;
++}
++
++void mipv6_shutdown_pfx_icmpv6(void)
++{
++	struct prefix_info *tmp;
++
++	if (timer_pending(&pfx_timer))
++		del_timer(&pfx_timer);
++
++	write_lock_bh(&pfx_list_lock);
++	while ((tmp = mipv6_slist_del_first(&pfx_list)))
++		kfree(tmp);
++	write_unlock_bh(&pfx_list_lock);
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/prefix.h linux-2.4.25/net/ipv6/mobile_ip6/prefix.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/prefix.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/prefix.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,57 @@
++/*
++ *      MIPL Mobile IPv6 Prefix solicitation and advertisement
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _PREFIX_H
++#define _PREFIX_H
++
++#include <net/addrconf.h>
++
++struct pfx_list_entry {
++	struct in6_addr daddr;
++	struct in6_addr saddr;
++	int retries;
++	int ifindex;
++};
++
++extern struct list_head pfx_list;
++extern rwlock_t pfx_list_lock;
++extern struct timer_list pfx_timer;
++
++int compare_pfx_list_entry(const void *data1, const void *data2,
++			   int datalen);
++
++/**
++ * mipv6_pfx_cancel_send - cancel pending pfx_advs/sols to daddr
++ * @daddr: destination address
++ * @ifindex: pending items on this interface will be canceled
++ *
++ * if ifindex == -1, all items to daddr will be removed
++ */
++void mipv6_pfx_cancel_send(struct in6_addr *daddr, int ifindex);
++
++/**
++ * mipv6_pfx_add_ha - add a new HA to send prefix solicitations to
++ * @daddr: address of HA
++ * @saddr: our address to use as source address
++ * @ifindex: interface index
++ */
++void mipv6_pfx_add_ha(struct in6_addr *daddr, struct in6_addr *saddr,
++		      int ifindex);
++
++void mipv6_pfxs_modified(struct prefix_info *pinfo, int ifindex);
++
++int mipv6_pfx_add_home(int ifindex, struct in6_addr *daddr,
++		       struct in6_addr *saddr, unsigned long min_expire);
++
++int mipv6_initialize_pfx_icmpv6(void);
++void mipv6_shutdown_pfx_icmpv6(void);
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/prefix_ha.c linux-2.4.25/net/ipv6/mobile_ip6/prefix_ha.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/prefix_ha.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/prefix_ha.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,122 @@
++/**
++ * Prefix advertisement for Home Agent
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/icmpv6.h>
++#include <linux/net.h>
++#include <linux/spinlock.h>
++#include <linux/timer.h>
++#include <linux/netdevice.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "mipv6_icmp.h"
++#include "debug.h"
++#include "sortedlist.h"
++#include "util.h"
++#include "bcache.h"
++#include "config.h"
++#include "prefix.h"
++
++/**
++ * pfx_adv_iterator - modify pfx_list entries according to new prefix info
++ * @data: MN's home registration bcache_entry
++ * @args: new prefix info
++ * @sortkey: ignored
++ */
++static int pfx_adv_iterator(void *data, void *args, unsigned long sortkey)
++{
++	struct mipv6_bce *bc_entry = (struct mipv6_bce *) data;
++	struct prefix_info *pinfo = (struct prefix_info *) args;
++
++	if (mipv6_prefix_compare(&bc_entry->coa, &pinfo->prefix,
++				 pinfo->prefix_len) == 0) {
++		struct pfx_list_entry pfx_entry;
++
++		memcpy(&pfx_entry.daddr, &bc_entry->coa,
++		       sizeof(struct in6_addr));
++		memcpy(&pfx_entry.daddr, &bc_entry->our_addr,
++		       sizeof(struct in6_addr));
++		pfx_entry.retries = 0;
++		pfx_entry.ifindex = bc_entry->ifindex;
++
++		mipv6_slist_modify(&pfx_list, &pfx_entry,
++				   sizeof(struct pfx_list_entry),
++				   jiffies +
++				   net_random() % (MAX_PFX_ADV_DELAY * HZ),
++				   compare_pfx_list_entry);
++	}
++
++	return 0;
++}
++
++struct homereg_iterator_args {
++	struct list_head *head;
++	int count;
++};
++
++static int homereg_iterator(void *data, void *args, unsigned long *sortkey)
++{
++	struct mipv6_bce *entry = (struct mipv6_bce *) data;
++	struct homereg_iterator_args *state =
++		(struct homereg_iterator_args *) args;
++
++	if (entry->type == HOME_REGISTRATION) {
++		mipv6_slist_add(state->head, entry,
++				sizeof(struct mipv6_bce),
++				state->count);
++		state->count++;
++	}
++	return 0;
++}
++
++static int mipv6_bcache_get_homeregs(struct list_head *head)
++{
++	struct homereg_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.count = 0;
++	args.head = head;
++
++	mipv6_bcache_iterate(homereg_iterator, &args);
++	return args.count;
++}
++
++/**
++ * mipv6_prefix_added - prefix was added to interface, act accordingly
++ * @pinfo: prefix_info that was added
++ * @ifindex: interface index
++ */
++void mipv6_pfxs_modified(struct prefix_info *pinfo, int ifindex)
++{
++	int count;
++	unsigned long tmp;
++	struct list_head home_regs;
++
++	DEBUG_FUNC();
++
++	INIT_LIST_HEAD(&home_regs);
++
++	if (!(count = mipv6_bcache_get_homeregs(&home_regs)))
++		return;
++
++	write_lock_bh(&pfx_list_lock);
++	mipv6_slist_for_each(&home_regs, pinfo, pfx_adv_iterator);
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++	write_unlock_bh(&pfx_list_lock);
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/rr_crypto.c linux-2.4.25/net/ipv6/mobile_ip6/rr_crypto.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/rr_crypto.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/rr_crypto.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,255 @@
++/*
++ *      rr_cookie.c - Mobile IPv6 return routability crypto  
++ *      Author :  Henrik Petander <henrik.petander@hut.fi>
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ *
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/spinlock.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/random.h>
++
++#include <net/ipv6.h>
++
++#include "debug.h"
++#include "hmac.h"
++#include "rr_crypto.h"
++
++#define DBG_RR 5
++
++u8 k_CN[HMAC_SHA1_KEY_SIZE]; // secret key of CN 
++
++u16 curr_index = 0;
++
++struct nonce_timestamp nonce_table[MAX_NONCES];
++spinlock_t nonce_lock = SPIN_LOCK_UNLOCKED;
++void update_nonces(void);
++
++/** nonce_is_fresh - whether the nonce was generated recently
++ *  
++ * @non_ts : table entry containing the nonce and a timestamp
++ * @interval : if nonce was generated within interval seconds it is fresh
++ *
++ * Returns 1 if the nonce is fresh, 0 otherwise.
++ */
++static int nonce_is_fresh(struct nonce_timestamp *non_ts, unsigned long interval)
++{
++	if (time_before(jiffies, non_ts->timestamp + interval * HZ) && !non_ts->invalid)
++		return 1;
++	return 0;
++}
++void mipv6_rr_invalidate_nonce(u16 nonce_ind)
++{
++	spin_lock_bh(&nonce_lock);
++	if (nonce_ind > MAX_NONCES) {
++		spin_unlock_bh(&nonce_lock);
++		return;
++	}
++	nonce_table[nonce_ind].invalid = 1;
++	spin_unlock_bh(&nonce_lock);
++}
++/* Returns a pointer to a new nonce  */
++struct mipv6_rr_nonce * mipv6_rr_get_new_nonce(void)
++{
++	struct mipv6_rr_nonce *nce = kmalloc(sizeof(*nce), GFP_ATOMIC);
++
++	if (!nce)
++		return NULL;
++	// Lock nonces here
++	spin_lock_bh(&nonce_lock);
++	// If nonce is not fresh create new one 
++	if (!nonce_is_fresh(&nonce_table[curr_index], MIPV6_RR_NONCE_LIFETIME)) {
++		// increment the last nonce pointer and create new nonce
++		curr_index++;
++		// Wrap around
++		if (curr_index == MAX_NONCES)
++			curr_index = 0;
++		// Get random data to fill the nonce data
++		get_random_bytes(nonce_table[curr_index].nonce.data, MIPV6_RR_NONCE_DATA_LENGTH);
++		// Fill the index field
++		nonce_table[curr_index].nonce.index = curr_index;
++		nonce_table[curr_index].invalid = 0;
++		nonce_table[curr_index].timestamp = jiffies;
++	}
++	spin_unlock_bh(&nonce_lock);
++	memcpy(nce, &nonce_table[curr_index].nonce, sizeof(*nce));
++	// Unlock nonces
++	return nce;
++}
++/** mipv6_rr_nonce_get_by_index - returns a nonce for index 
++ * @nonce_ind : index of the nonce
++ *
++ * Returns a nonce or NULL if the nonce index was invalid or the nonce 
++ * for the index was not fresh.
++ */
++struct mipv6_rr_nonce * mipv6_rr_nonce_get_by_index(u16 nonce_ind)
++{
++	struct mipv6_rr_nonce *nce = NULL;
++	
++	spin_lock_bh(&nonce_lock);
++	if (nonce_ind >= MAX_NONCES) {
++		DEBUG(DBG_WARNING, "Nonce index field from BU invalid");
++
++		/* Here a double of the nonce_lifetime is used for freshness 
++		 * verification, since the nonces 
++		 * are not created in response to every initiator packet
++		 */
++	} else if (nonce_is_fresh(&nonce_table[nonce_ind], 2 * MIPV6_RR_NONCE_LIFETIME)) {
++		nce = kmalloc(sizeof(*nce), GFP_ATOMIC);
++		memcpy(nce, &nonce_table[nonce_ind].nonce, sizeof(*nce));
++	}
++	spin_unlock_bh(&nonce_lock);
++
++	return nce;
++}
++
++/* Fills rr test init cookies with random bytes */  
++void mipv6_rr_mn_cookie_create(u8 *cookie)
++{
++	get_random_bytes(cookie, MIPV6_RR_COOKIE_LENGTH);
++}
++
++/** mipv6_rr_cookie_create - builds a home or care-of cookie
++ * 
++ * @addr : the home or care-of address from HoTI or CoTI
++ * @ckie : memory where the cookie is copied to
++ * @nce : pointer to a nonce used for the calculation, nce is freed during the function
++ *
++ */
++int mipv6_rr_cookie_create(struct in6_addr *addr, u8 **ckie,
++	       	u16 nonce_index)
++{
++	struct ah_processing ah_proc;
++	u8 digest[HMAC_SHA1_HASH_LEN];
++	struct mipv6_rr_nonce *nce;
++
++	if ((nce = mipv6_rr_nonce_get_by_index(nonce_index))== NULL)
++		return -1;
++
++	if (*ckie == NULL && (*ckie = kmalloc(MIPV6_RR_COOKIE_LENGTH,
++				       	GFP_ATOMIC)) == NULL) {
++		kfree(nce);
++		return -1;
++	}
++	/* Calculate the full hmac-sha1 digest from address and nonce using the secret key of cn */
++	
++	if (ah_hmac_sha1_init(&ah_proc, k_CN, HMAC_SHA1_KEY_SIZE) < 0) {
++		DEBUG(DBG_ERROR, "Hmac sha1 initialization failed");
++		kfree(nce);
++		return -1;
++	}
++
++	ah_hmac_sha1_loop(&ah_proc, addr, sizeof(*addr));
++	ah_hmac_sha1_loop(&ah_proc, nce->data,  MIPV6_RR_NONCE_DATA_LENGTH);
++	ah_hmac_sha1_result(&ah_proc, digest);
++
++	
++	/* clean up nonce */
++	kfree(nce);
++
++	/* Copy first 64 bits of hash target to the cookie */ 
++	memcpy(*ckie, digest, MIPV6_RR_COOKIE_LENGTH);
++	return 0;
++}
++
++/** mipv6_rr_key_calc - creates BU authentication key
++ * 
++ * @hoc : Home Cookie 
++ * @coc : Care-of Cookie 
++ * 
++ * Returns BU authentication key of length HMAC_SHA1_KEY_SIZE  or NULL in error cases, 
++ * caller needs to free the key.
++ */
++u8 *mipv6_rr_key_calc(u8 *hoc, u8 *coc)
++{
++	
++	u8 *key_bu = kmalloc(HMAC_SHA1_KEY_SIZE, GFP_ATOMIC);
++	SHA1_CTX c;
++
++	if (!key_bu) {
++		DEBUG(DBG_CRITICAL, "Memory allocation failed, could nort create BU authentication key");
++		return NULL;
++	}
++
++	/* Calculate the key from home and care-of cookies 
++	 * Kbu = sha1(home_cookie | care-of cookie) 
++	 * or KBu = sha1(home_cookie), if MN deregisters
++	 */
++	sha1_init(&c);
++	sha1_compute(&c, hoc, MIPV6_RR_COOKIE_LENGTH);
++	if (coc)
++		sha1_compute(&c, coc, MIPV6_RR_COOKIE_LENGTH);
++	sha1_final(&c, key_bu);
++	DEBUG(DBG_RR, "Home and Care-of cookies used for calculating key ");
++	debug_print_buffer(DBG_RR, hoc,  MIPV6_RR_COOKIE_LENGTH);
++	if (coc)	
++		debug_print_buffer(DBG_RR, coc,  MIPV6_RR_COOKIE_LENGTH);
++
++	return key_bu;
++}
++
++void mipv6_rr_init(void)
++{
++	get_random_bytes(k_CN, HMAC_SHA1_KEY_SIZE);
++	memset(nonce_table, 0, MAX_NONCES * sizeof(struct nonce_timestamp));
++}
++
++#ifdef TEST_MIPV6_RR_CRYPTO
++void mipv6_test_rr(void)
++{
++	struct mipv6_rr_nonce *nonce;
++	struct in6_addr a1, a2;
++	int ind1, ind2;
++	u8 *ckie1 = NULL, *ckie2 = NULL;
++	u8 *key_mn = NULL, *key_cn = NULL;
++	mipv6_init_rr();
++
++	nonce = mipv6_rr_get_new_nonce();
++	if (!nonce) {
++		printk("mipv6_rr_get_new_nonce() failed, at 1! \n");
++		return;
++	}
++	mipv6_rr_cookie_create(&a1, &ckie1, nonce->index);
++	ind1 = nonce->index;
++	kfree(nonce);
++
++	nonce = mipv6_rr_get_new_nonce();
++	if (!nonce) {
++		printk("mipv6_rr_get_new_nonce() failed, at 2! \n");
++		return;
++	}
++
++	mipv6_rr_cookie_create(&a2, &ckie2, nonce->index); 
++	ind2 = nonce->index;
++	key_mn =  mipv6_rr_key_calc(ckie1, ckie2);
++
++	/* Create home and coa cookies based on indices */
++	mipv6_rr_cookie_create(&a1, &ckie1, ind1);
++	mipv6_rr_cookie_create(&a2, &ckie2, ind2);
++	key_cn =  mipv6_rr_key_calc(ckie1, ckie2);	       
++	if (!key_cn || !key_mn) {
++		printk("creation of secret key failed!\n");
++		return;
++	}
++	if(memcmp(key_cn, key_mn, HMAC_SHA1_KEY_SIZE))
++		printk("mipv6_rr_key_calc produced different keys for MN and CN \n");
++	else
++		printk("mipv6_rr_crypto test OK\n");
++	kfree(nonce);
++	kfree(key_cn);
++	kfree(key_mn);
++}
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/rr_crypto.h linux-2.4.25/net/ipv6/mobile_ip6/rr_crypto.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/rr_crypto.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/rr_crypto.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,72 @@
++/*
++ *      MIPL Mobile IPv6 Return routability crypto prototypes
++ *
++ *      $Id:$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _RR_CRYPTO
++#define _RR_CRYPTO
++
++#include <linux/in6.h>
++
++/* Macros and data structures */
++
++#define MIPV6_RR_NONCE_LIFETIME 60 
++#define MIPV6_RR_NONCE_DATA_LENGTH 8
++#define MIPV6_RR_COOKIE_LENGTH 8
++#define COOKIE_SIZE 8
++#define MAX_NONCES 4
++#define HMAC_SHA1_KEY_SIZE 20
++ 
++struct mipv6_rr_nonce {
++	u_int16_t index;
++	u_int8_t data[MIPV6_RR_NONCE_DATA_LENGTH];
++};
++
++struct nonce_timestamp {
++	struct  mipv6_rr_nonce nonce;
++	unsigned long timestamp;
++	u_int8_t invalid; 
++};
++
++/* Function definitions */
++
++/* Return 1 if equal, 0 if not */
++static __inline__ int mipv6_equal_cookies(u8 *c1, u8 *c2)
++{
++	return (memcmp(c1, c2, MIPV6_RR_COOKIE_LENGTH) == 0);
++}
++
++/* Function declarations */
++
++/* Create cookie for HoTi and CoTi */
++extern void mipv6_rr_mn_cookie_create(u8 *cookie);
++
++/* Create cookie for HoT and CoT */
++extern int mipv6_rr_cookie_create(struct in6_addr *addr, u8 **ckie, u16 nonce_index);
++
++/* Calculate return routability key from home and care-of cookies, key length is 
++ *  HMAC_SHA1_KEY_SIZE  
++ */
++extern u_int8_t *mipv6_rr_key_calc(u8 *hoc, u8 *coc);
++
++extern struct mipv6_rr_nonce *mipv6_rr_get_new_nonce(void);
++
++/* For avoiding replay attacks when MN deregisters */
++extern void mipv6_rr_invalidate_nonce(u16 nonce_index);
++/*
++ * initializes the return routability crypto
++ */
++
++void mipv6_rr_init(void);
++
++#ifdef TEST_MIPV6_RR_CRYPTO
++void mipv6_test_rr(void);
++#endif /* TEST_MIPV6_RR_CRYPTO */
++
++#endif /* RR_CRYPTO */
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/sortedlist.c linux-2.4.25/net/ipv6/mobile_ip6/sortedlist.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/sortedlist.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/sortedlist.c	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,349 @@
++/**
++ * Sorted list - linked list with sortkey.
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++#include <linux/string.h>
++
++struct mipv6_sorted_list_entry {
++	struct list_head list;
++	void *data;
++	int datalen;
++	unsigned long sortkey;
++};
++
++/**
++ * compare - compares two arbitrary data items
++ * @data1: first data item
++ * @data2: second data item
++ * @datalen: length of data items in bits
++ *
++ * datalen is in bits!
++ */
++int mipv6_bitwise_compare(const void *data1, const void *data2, int datalen)
++{
++	int n = datalen;
++	__u8 * ptr1 = (__u8 *)data1;
++	__u8 * ptr2 = (__u8 *)data2;
++	
++	for (; n>=0; n-=8, ptr1++, ptr2++) {
++		if (n >= 8) {
++			if (*ptr1 != *ptr2)
++				return 0;
++		} else {
++			if ((*ptr1 ^ *ptr2) & ((~0) << (8 - n)))
++				return 0;
++		}
++	}
++
++	return 1;
++}
++
++/**
++ * mipv6_slist_add - add an entry to sorted list
++ * @head: list_head of the sorted list
++ * @data: item to store
++ * @datalen: length of data (in bytes)
++ * @key: sortkey of item
++ *
++ * Allocates memory for entry and data
++ */
++int mipv6_slist_add(struct list_head *head, void *data, int datalen,
++		    unsigned long sortkey)
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry, *tmp, *next;
++
++	entry = kmalloc(sizeof(struct mipv6_sorted_list_entry), GFP_ATOMIC);
++
++	if (!entry)
++		return -1;
++
++	entry->data = kmalloc(datalen, GFP_ATOMIC);
++
++	if (!entry->data) {
++		kfree(entry);
++		return -1;
++	}
++
++	memcpy(entry->data, data, datalen);
++	entry->datalen = datalen;
++	entry->sortkey = sortkey;
++
++	if ((pos = head->next) == head) {
++		list_add(&entry->list, head);
++		return 0;
++	}
++
++	tmp = list_entry(pos, struct mipv6_sorted_list_entry, list);
++	if (entry->sortkey < tmp->sortkey) {
++		list_add(&entry->list, head);
++		return 0;
++	}
++
++	for (; pos != head; pos = pos->next) {
++		tmp = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (pos->next == head) {
++			list_add(&entry->list, &tmp->list);
++			return 0;
++		}
++		next = list_entry(pos->next, struct mipv6_sorted_list_entry, list);
++		if (entry->sortkey >= tmp->sortkey && entry->sortkey < next->sortkey) {
++			list_add(&entry->list, &tmp->list);
++			return 0;
++		}
++	}
++
++	/* never reached */
++	return -1;
++}
++
++/**
++ * mipv6_slist_get_first - get the first data item in the list
++ * @head: list_head of the sorted list
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_first(struct list_head *head)
++{
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return NULL;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	return entry->data;
++}
++
++/**
++ * mipv6_slist_del_first - delete (and get) the first item in list
++ * @head: list_head of the sorted list
++ *
++ * Remember to kfree the item
++ */
++void *mipv6_slist_del_first(struct list_head *head)
++{
++	void *tmp;
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return NULL;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	tmp = entry->data;
++
++	list_del(head->next);
++	kfree(entry);
++
++	return tmp;
++}
++
++/**
++ * mipv6_slist_del_item - delete entry
++ * @head: list_head of the sorted list
++ * @data: item to delete
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen)
++ */
++int mipv6_slist_del_item(struct list_head *head, void *data,
++			 int (*compare)(const void *data1, const void *data2,
++					int datalen))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	for(pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (compare(data, entry->data, entry->datalen)) {
++			list_del(pos);
++			kfree(entry->data);
++			kfree(entry);
++			return 0;
++		}
++	}
++
++	return -1;
++}
++
++/**
++ * mipv6_slist_get_first_key - get sortkey of the first item
++ * @head: list_head of the sorted list
++ */
++unsigned long mipv6_slist_get_first_key(struct list_head *head)
++{
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return 0;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	return entry->sortkey;
++}
++
++/**
++ * mipv6_slist_get_key - get sortkey of the data item
++ * @head: list_head of the sorted list
++ * @data: the item to search for
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen)
++ */
++unsigned long mipv6_slist_get_key(struct list_head *head, void *data,
++				  int (*compare)(const void *data1,
++						 const void *data2,
++						 int datalen))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++	
++	for(pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (compare(data, entry->data, entry->datalen))
++			return entry->sortkey;
++	}
++	
++	return 0;
++}
++
++/**
++ * mipv6_slist_get_data - get the data item identified by sortkey
++ * @head: list_head of the sorted list
++ * @key: sortkey of the item
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_data(struct list_head *head, unsigned long sortkey)
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	list_for_each(pos, head) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (entry->sortkey == sortkey) 
++			return entry->data;
++	}
++
++	return NULL;
++}
++
++/**
++ * reorder_entry - move an entry to a new position according to sortkey
++ * @head: list_head of the sorted list
++ * @entry_pos: current place of the entry
++ * @key: new sortkey
++ */
++static void reorder_entry(struct list_head *head, struct list_head *entry_pos,
++			  unsigned long sortkey)
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	list_del(entry_pos);
++
++	for (pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (sortkey >= entry->sortkey) {
++			list_add(entry_pos, &entry->list);
++			return;
++		}
++	}
++
++	list_add(entry_pos, head);
++}
++
++/**
++ * mipv6_slist_modify - modify data item
++ * @head: list_head of the sorted list
++ * @data: item, whose sortkey is to be modified
++ * @datalen: datalen in bytes
++ * @new_key: new sortkey
++ * @compare: function used for comparing the data items
++ *
++ * Compies the new data on top of the old one, if compare function returns
++ * true. If there's no matching entry, new one will be created.
++ * Compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen)
++ */
++int mipv6_slist_modify(struct list_head *head, void *data, int datalen,
++		       unsigned long new_key,
++		       int (*compare)(const void *data1, const void *data2,
++				      int datalen))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	for (pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (compare(data, entry->data, datalen)) {
++			memcpy(entry->data, data, datalen);
++			entry->sortkey = new_key;
++			reorder_entry(head, &entry->list, new_key);
++			return 0;
++		}
++	}
++
++	return mipv6_slist_add(head, data, datalen, new_key);
++}
++
++/**
++ * mipv6_slist_push_first - move the first entry to place indicated by new_key
++ * @head: list_head of the sorted list
++ * @new_key: new sortkey
++ */
++int mipv6_slist_push_first(struct list_head *head, unsigned long new_key)
++{
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return -1;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	entry->sortkey = new_key;
++
++	reorder_entry(head, head->next, new_key);
++	return 0;
++}
++
++/**
++ * mipv6_slist_for_each - apply func to every item in list
++ * @head: list_head of the sorted list
++ * @args: args to pass to func
++ * @func: function to use
++ *
++ * function must be of type
++ * int (*func)(void *data, void *args, unsigned long sortkey)
++ * List iteration will stop once func has been applied to every item
++ * or when func returns true
++ */
++int mipv6_slist_for_each(struct list_head *head, void *args,
++			 int (*func)(void *data, void *args,
++				     unsigned long sortkey))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	list_for_each(pos, head) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (func(entry->data, args, entry->sortkey))
++			break;
++	}
++
++	return 0;
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/sortedlist.h linux-2.4.25/net/ipv6/mobile_ip6/sortedlist.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/sortedlist.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/sortedlist.h	2004-06-26 11:29:31.000000000 +0100
+@@ -0,0 +1,133 @@
++/*
++ *      Sorted list - linked list with sortkey
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++/**
++ * compare - compares two arbitrary data items
++ * @data1: first data item
++ * @data2: second data item
++ * @datalen: length of data items in bits
++ *
++ * datalen is in bits!
++ */
++int mipv6_bitwise_compare(const void *data1, const void *data2, int datalen);
++
++/**
++ * mipv6_slist_add - add an entry to sorted list
++ * @head: list_head of the sorted list
++ * @data: item to store
++ * @datalen: length of data (in bytes)
++ * @key: sortkey of item
++ *
++ * Allocates memory for entry and data
++ */
++int mipv6_slist_add(struct list_head *head, void *data, int datalen,
++		    unsigned long sortkey);
++
++/**
++ * mipv6_slist_get_first - get the first data item in the list
++ * @head: list_head of the sorted list
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_first(struct list_head *head);
++
++/**
++ * mipv6_slist_del_first - delete (and get) the first item in list
++ * @head: list_head of the sorted list
++ *
++ * Remember to kfree the item
++ */
++void *mipv6_slist_del_first(struct list_head *head);
++
++/**
++ * mipv6_slist_del_item - delete entry
++ * @head: list_head of the sorted list
++ * @data: item to delete
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen) where
++ * datalen is in bits
++ */
++int mipv6_slist_del_item(struct list_head *head, void *data,
++			 int (*compare)(const void *data1, const void *data2,
++					int datalen));
++
++/**
++ * mipv6_slist_get_first_key - get sortkey of the first item
++ * @head: list_head of the sorted list
++ */
++unsigned long mipv6_slist_get_first_key(struct list_head *head);
++
++/**
++ * mipv6_slist_get_key - get sortkey of the data item
++ * @head: list_head of the sorted list
++ * @data: the item to search for
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen) where
++ * datalen is in bits
++ */
++unsigned long mipv6_slist_get_key(struct list_head *head, void *data,
++				  int (*compare)(const void *data1,
++						 const void *data2,
++						 int datalen));
++
++/**
++ * mipv6_slist_get_data - get the data item identified by sortkey
++ * @head: list_head of the sorted list
++ * @key: sortkey of the item
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_data(struct list_head *head, unsigned long sortkey);
++
++/**
++ * mipv6_slist_modify - modify data item
++ * @head: list_head of the sorted list
++ * @data: item, whose sortkey is to be modified
++ * @datalen: datalen in bytes
++ * @new_key: new sortkey
++ * @compare: function used for comparing the data items
++ *
++ * Compies the new data on top of the old one, if compare function returns
++ * non-negative. If there's no matching entry, new one will be created.
++ * Compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen) where
++ * datalen is in bits.
++ */
++int mipv6_slist_modify(struct list_head *head, void *data, int datalen,
++		       unsigned long new_key,
++		       int (*compare)(const void *data1, const void *data2,
++				      int datalen));
++
++/**
++ * mipv6_slist_push_first - move the first entry to place indicated by new_key
++ * @head: list_head of the sorted list
++ * @new_key: new sortkey
++ */
++int mipv6_slist_push_first(struct list_head *head, unsigned long new_key);
++
++/**
++ * mipv6_slist_for_each - apply func to every item in list
++ * @head: list_head of the sorted list
++ * @args: args to pass to func
++ * @func: function to use
++ *
++ * function must be of type
++ * int (*func)(void *data, void *args, unsigned long sortkey)
++ * List iteration will stop once func has been applied to every item
++ * or when func returns true
++ */
++int mipv6_slist_for_each(struct list_head *head, void *args,
++			 int (*func)(void *data, void *args,
++				     unsigned long sortkey));
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/stats.c linux-2.4.25/net/ipv6/mobile_ip6/stats.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/stats.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/stats.c	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,90 @@
++/*
++ *      Statistics module
++ *
++ *      Authors:
++ *      Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *     
++ *      Changes:
++ *      Krishna Kumar, 
++ *      Venkata Jagana   :  SMP locking fix  
++ */
++
++#include <linux/config.h>
++#include <linux/proc_fs.h>
++#include "stats.h"
++
++struct mipv6_statistics mipv6_stats;
++
++static int proc_info_dump(
++	char *buffer, char **start,
++	off_t offset, int length)
++{
++	struct inf {
++		char *name;
++		int *value;
++	} int_stats[] = {
++		{"NEncapsulations", &mipv6_stats.n_encapsulations},
++		{"NDecapsulations", &mipv6_stats.n_decapsulations},
++		{"NBindRefreshRqsRcvd", &mipv6_stats.n_brr_rcvd},
++		{"NHomeTestInitsRcvd", &mipv6_stats.n_hoti_rcvd},
++		{"NCareofTestInitsRcvd", &mipv6_stats.n_coti_rcvd},
++		{"NHomeTestRcvd", &mipv6_stats.n_hot_rcvd},
++		{"NCareofTestRcvd", &mipv6_stats.n_cot_rcvd},
++		{"NBindUpdatesRcvd", &mipv6_stats.n_bu_rcvd},
++		{"NBindAcksRcvd", &mipv6_stats.n_ba_rcvd},
++		{"NBindNAcksRcvd", &mipv6_stats.n_ban_rcvd},
++		{"NBindErrorsRcvd", &mipv6_stats.n_be_rcvd},
++		{"NBindRefreshRqsSent", &mipv6_stats.n_brr_sent},
++		{"NHomeTestInitsSent", &mipv6_stats.n_hoti_sent},
++		{"NCareofTestInitsSent", &mipv6_stats.n_coti_sent},
++		{"NHomeTestSent", &mipv6_stats.n_hot_sent},
++		{"NCareofTestSent", &mipv6_stats.n_cot_sent},
++		{"NBindUpdatesSent", &mipv6_stats.n_bu_sent},
++		{"NBindAcksSent", &mipv6_stats.n_ba_sent},
++		{"NBindNAcksSent", &mipv6_stats.n_ban_sent},
++		{"NBindErrorsSent", &mipv6_stats.n_be_sent},
++		{"NBindUpdatesDropAuth", &mipv6_stats.n_bu_drop.auth},
++		{"NBindUpdatesDropInvalid", &mipv6_stats.n_bu_drop.invalid},
++		{"NBindUpdatesDropMisc", &mipv6_stats.n_bu_drop.misc},
++		{"NBindAcksDropAuth", &mipv6_stats.n_bu_drop.auth},
++		{"NBindAcksDropInvalid", &mipv6_stats.n_bu_drop.invalid},
++		{"NBindAcksDropMisc", &mipv6_stats.n_bu_drop.misc},
++		{"NBindRqsDropAuth", &mipv6_stats.n_bu_drop.auth},
++		{"NBindRqsDropInvalid", &mipv6_stats.n_bu_drop.invalid},
++		{"NBindRqsDropMisc", &mipv6_stats.n_bu_drop.misc}
++	};
++
++	int i;
++	int len = 0;
++	for(i=0; i<sizeof(int_stats) / sizeof(struct inf); i++) {
++		len += sprintf(buffer + len, "%s = %d\n",
++			       int_stats[i].name, *int_stats[i].value);
++	}
++
++	*start = buffer + offset;
++
++	len -= offset;
++
++	if(len > length) len = length;
++
++	return len;
++}
++
++int mipv6_stats_init(void)
++{
++	memset(&mipv6_stats, 0, sizeof(struct mipv6_statistics));
++	proc_net_create("mip6_stat", 0, proc_info_dump);
++	return 0;
++}
++
++void mipv6_stats_exit(void)
++{
++	proc_net_remove("mip6_stat");
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/stats.h linux-2.4.25/net/ipv6/mobile_ip6/stats.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/stats.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/stats.h	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,71 @@
++/*
++ *      MIPL Mobile IPv6 Statistics header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _STATS_H
++#define _STATS_H
++
++struct mipv6_drop {
++	__u32 auth;
++	__u32 invalid;
++	__u32 misc;
++};
++
++struct mipv6_statistics {
++	int n_encapsulations;
++	int n_decapsulations;
++	int n_mh_in_msg;
++	int n_mh_in_error;
++	int n_mh_out_msg;
++	int n_mh_out_error;
++
++	int n_brr_rcvd;
++	int n_hoti_rcvd;
++	int n_coti_rcvd;
++	int n_hot_rcvd;
++	int n_cot_rcvd;
++	int n_bu_rcvd;
++	int n_ba_rcvd;
++	int n_ban_rcvd;
++	int n_be_rcvd;
++
++	int n_brr_sent;
++	int n_hoti_sent;
++	int n_coti_sent;
++	int n_hot_sent;
++	int n_cot_sent;
++	int n_bu_sent;
++	int n_ba_sent;
++	int n_ban_sent;
++	int n_be_sent;
++
++	int n_ha_rcvd;
++	int n_ha_sent;
++
++	struct mipv6_drop n_bu_drop;
++	struct mipv6_drop n_ba_drop;
++	struct mipv6_drop n_brr_drop;
++	struct mipv6_drop n_be_drop;
++	struct mipv6_drop n_ha_drop;
++};
++
++extern struct mipv6_statistics mipv6_stats;
++
++#ifdef CONFIG_SMP
++/* atomic_t is max 24 bits long */
++#define MIPV6_INC_STATS(X) atomic_inc((atomic_t *)&mipv6_stats.X);
++#else
++#define MIPV6_INC_STATS(X) mipv6_stats.X++;
++#endif
++
++int mipv6_stats_init(void);
++void mipv6_stats_exit(void);
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel.h linux-2.4.25/net/ipv6/mobile_ip6/tunnel.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/tunnel.h	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,35 @@
++/*
++ *      MIPL Mobile IPv6 IP6-IP6 tunneling header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _TUNNEL_H
++#define _TUNNEL_H
++
++#include <linux/in6.h>
++#include <linux/if_arp.h>
++#include <net/ipv6_tunnel.h>
++
++static __inline__ int is_mip6_tnl(struct ip6_tnl *t)
++{
++	return (t != NULL && 
++		t->parms.flags & IP6_TNL_F_KERNEL_DEV &&
++		t->parms.flags & IP6_TNL_F_MIP6_DEV);
++			
++}
++
++static __inline__ int dev_is_mip6_tnl(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *)dev->priv;
++	return (dev->type == ARPHRD_TUNNEL6 && is_mip6_tnl(t));
++}
++
++
++#endif
++
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_ha.c linux-2.4.25/net/ipv6/mobile_ip6/tunnel_ha.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_ha.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/tunnel_ha.c	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,264 @@
++/*
++ *	IPv6-IPv6 tunneling module
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *	Ville Nuorvala          <vnuorval@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/net.h>
++#include <linux/skbuff.h>
++#include <linux/ipv6.h>
++#include <linux/net.h>
++#include <linux/netdevice.h>
++#include <linux/init.h>
++#include <linux/route.h>
++#include <linux/ipv6_route.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/protocol.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/dst.h>
++#include <net/addrconf.h>
++
++#include "tunnel.h"
++#include "debug.h"
++#include "stats.h"
++#include "config.h"
++
++#define MIPV6_TNL_MAX IP6_TNL_MAX
++#define MIPV6_TNL_MIN 1
++
++int mipv6_max_tnls = 3;
++int mipv6_min_tnls = 1;
++
++DECLARE_MUTEX(tnl_sem);
++
++int mipv6_max_tnls_sysctl(ctl_table *ctl, int write, struct file *filp,
++			  void *buffer, size_t *lenp)
++{
++	int err;
++	
++	DEBUG_FUNC();
++
++	down(&tnl_sem);
++	if (write) {
++		int diff;
++		int old_max_tnls = mipv6_max_tnls;
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++		if (err < 0) 
++			goto out;
++		if (mipv6_max_tnls < mipv6_min_tnls || 
++		    mipv6_max_tnls > MIPV6_TNL_MAX) {
++			mipv6_max_tnls = old_max_tnls;
++			goto out;
++		}
++		if (mipv6_max_tnls < old_max_tnls) {
++			diff = old_max_tnls - mipv6_max_tnls;
++			ip6ip6_tnl_dec_max_kdev_count(diff);
++		} else if (mipv6_max_tnls > old_max_tnls) {
++			diff = mipv6_max_tnls - old_max_tnls;
++			ip6ip6_tnl_inc_max_kdev_count(diff);
++		}
++	} else {
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++	}
++out:
++	up(&tnl_sem);
++	return err;
++}
++
++int mipv6_min_tnls_sysctl(ctl_table *ctl, int write, struct file *filp,
++			  void *buffer, size_t *lenp)
++{
++	int err;
++
++	DEBUG_FUNC();
++
++	down(&tnl_sem);
++	if (write) {
++		int diff;
++		int old_min_tnls = mipv6_min_tnls;
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++		if (err < 0) 
++			goto out;
++		if (mipv6_min_tnls > mipv6_max_tnls || 
++		    mipv6_min_tnls < MIPV6_TNL_MIN) {
++			mipv6_min_tnls = old_min_tnls;
++			goto out;
++		}
++		if (mipv6_min_tnls < old_min_tnls) {
++			diff = old_min_tnls - mipv6_min_tnls;
++			ip6ip6_tnl_dec_min_kdev_count(diff);
++		} else if (mipv6_min_tnls > old_min_tnls) {
++			diff = mipv6_min_tnls - old_min_tnls;
++			ip6ip6_tnl_inc_min_kdev_count(diff);
++		}
++	} else {
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++	}
++out:
++	up(&tnl_sem);
++	return err;
++}
++
++static __inline__ int mipv6_tnl_add(struct in6_addr *remote, 
++				    struct in6_addr *local) 
++{
++	struct ip6_tnl_parm p;
++	int ret;
++
++	DEBUG_FUNC();
++
++ 	memset(&p, 0, sizeof(p));
++	p.proto = IPPROTO_IPV6;
++	ipv6_addr_copy(&p.laddr, local);
++	ipv6_addr_copy(&p.raddr, remote);
++	p.hop_limit = 255;
++	p.flags = (IP6_TNL_F_KERNEL_DEV | IP6_TNL_F_MIP6_DEV |
++		   IP6_TNL_F_IGN_ENCAP_LIMIT);
++
++	ret = ip6ip6_kernel_tnl_add(&p);
++	if (ret > 0) {
++		DEBUG(DBG_INFO, "added tunnel from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x to: %x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(local), NIPV6ADDR(remote));
++	} else {
++		DEBUG(DBG_WARNING, "unable to add tunnel from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x to: %x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(local), NIPV6ADDR(remote));		
++	}
++	return ret;
++}
++
++static __inline__ int mipv6_tnl_del(struct in6_addr *remote, 
++				    struct in6_addr *local) 
++{
++	struct ip6_tnl *t = ip6ip6_tnl_lookup(remote, local);
++	
++	DEBUG_FUNC();
++	
++	if (t != NULL && (t->parms.flags & IP6_TNL_F_MIP6_DEV)) {
++		DEBUG(DBG_INFO, "deleting tunnel from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x to: %x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(local), NIPV6ADDR(remote));
++
++		return ip6ip6_kernel_tnl_del(t);
++	}
++	return 0;
++}
++
++static int add_route_to_mn(struct in6_addr *coa, struct in6_addr *ha_addr, 
++			   struct in6_addr *home_addr) 
++{
++	struct in6_rtmsg rtmsg;
++	int err;
++	struct ip6_tnl *t = ip6ip6_tnl_lookup(coa, ha_addr);
++	
++	if (!is_mip6_tnl(t)) {
++		DEBUG(DBG_CRITICAL,"Tunnel missing");
++		return -ENODEV;
++	}
++	
++	DEBUG(DBG_INFO, "adding route to: %x:%x:%x:%x:%x:%x:%x:%x via "
++	      "tunnel device", NIPV6ADDR(home_addr));
++
++	memset(&rtmsg, 0, sizeof(rtmsg));
++	ipv6_addr_copy(&rtmsg.rtmsg_dst, home_addr);
++	rtmsg.rtmsg_dst_len = 128;
++	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
++	rtmsg.rtmsg_flags = RTF_UP | RTF_NONEXTHOP | RTF_HOST | RTF_MOBILENODE;
++	rtmsg.rtmsg_ifindex = t->dev->ifindex;
++	rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++	if ((err = ip6_route_add(&rtmsg, NULL)) == -EEXIST) {
++		err = 0;
++	}
++	return err;
++}
++
++static void del_route_to_mn(struct in6_addr *coa, struct in6_addr *ha_addr, 
++			    struct in6_addr *home_addr) 
++{
++	struct ip6_tnl *t = ip6ip6_tnl_lookup(coa, ha_addr);
++
++	DEBUG_FUNC();
++
++	if (is_mip6_tnl(t)) {
++		struct in6_rtmsg rtmsg;
++
++		DEBUG(DBG_INFO, "deleting route to: %x:%x:%x:%x:%x:%x:%x:%x "
++		      " via tunnel device", NIPV6ADDR(home_addr));
++
++		memset(&rtmsg, 0, sizeof(rtmsg));
++		ipv6_addr_copy(&rtmsg.rtmsg_dst, home_addr);
++		rtmsg.rtmsg_dst_len = 128;
++		rtmsg.rtmsg_ifindex = t->dev->ifindex;
++		rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++		ip6_route_del(&rtmsg, NULL);
++	}
++}
++
++
++int mipv6_add_tnl_to_mn(struct in6_addr *coa, 
++			struct in6_addr *ha_addr,
++			struct in6_addr *home_addr)
++{
++	int ret;
++
++	DEBUG_FUNC();
++
++	ret = mipv6_tnl_add(coa, ha_addr);
++
++	if (ret > 0) {
++		int err = add_route_to_mn(coa, ha_addr, home_addr);
++		if (err) {
++			if (err != -ENODEV) {
++				mipv6_tnl_del(coa, ha_addr);
++			}
++			return err;
++		}
++	}
++	return ret;
++} 
++
++int mipv6_del_tnl_to_mn(struct in6_addr *coa, 
++			struct in6_addr *ha_addr,
++			struct in6_addr *home_addr)
++{
++	DEBUG_FUNC();
++	del_route_to_mn(coa, ha_addr, home_addr);
++	return mipv6_tnl_del(coa, ha_addr);
++} 
++
++__init void mipv6_initialize_tunnel(void)
++{
++	down(&tnl_sem);
++	ip6ip6_tnl_inc_max_kdev_count(mipv6_max_tnls);
++	ip6ip6_tnl_inc_min_kdev_count(mipv6_min_tnls);
++	up(&tnl_sem);
++	mip6_fn.bce_tnl_rt_add = add_route_to_mn;
++	mip6_fn.bce_tnl_rt_del = del_route_to_mn;
++}
++
++__exit void mipv6_shutdown_tunnel(void)
++{
++	mip6_fn.bce_tnl_rt_del = NULL;
++	mip6_fn.bce_tnl_rt_add = NULL;
++	down(&tnl_sem);
++	ip6ip6_tnl_dec_min_kdev_count(mipv6_min_tnls);
++	ip6ip6_tnl_dec_max_kdev_count(mipv6_max_tnls);
++	up(&tnl_sem);
++}
++
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_ha.h linux-2.4.25/net/ipv6/mobile_ip6/tunnel_ha.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_ha.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/tunnel_ha.h	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,20 @@
++#ifndef _TUNNEL_HA_H
++#define _TUNNEL_HA_H
++
++#include "tunnel.h"
++
++extern int mipv6_max_tnls;
++extern int mipv6_min_tnls;
++
++extern void mipv6_initialize_tunnel(void);
++extern void mipv6_shutdown_tunnel(void);
++
++extern int mipv6_add_tnl_to_mn(struct in6_addr *coa, 
++			       struct in6_addr *ha_addr,
++			       struct in6_addr *home_addr);
++
++extern int mipv6_del_tnl_to_mn(struct in6_addr *coa, 
++			       struct in6_addr *ha_addr,
++			       struct in6_addr *home_addr);
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_mn.c linux-2.4.25/net/ipv6/mobile_ip6/tunnel_mn.c
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_mn.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/tunnel_mn.c	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,160 @@
++/*
++ *	IPv6-IPv6 tunneling module
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *	Ville Nuorvala          <vnuorval@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/net.h>
++#include <linux/skbuff.h>
++#include <linux/ipv6.h>
++#include <linux/net.h>
++#include <linux/netdevice.h>
++#include <linux/init.h>
++#include <linux/route.h>
++#include <linux/ipv6_route.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/protocol.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/dst.h>
++#include <net/addrconf.h>
++
++#include "tunnel.h"
++#include "debug.h"
++#include "stats.h"
++
++static struct net_device *mn_ha_tdev;
++
++static spinlock_t mn_ha_lock = SPIN_LOCK_UNLOCKED;
++
++static __inline__ int add_reverse_route(struct in6_addr *ha_addr,
++					struct in6_addr *home_addr, 
++					struct net_device *tdev) 
++{
++	struct in6_rtmsg rtmsg;
++	int err;
++
++	DEBUG_FUNC();
++
++	memset(&rtmsg, 0, sizeof(rtmsg));
++	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
++	ipv6_addr_copy(&rtmsg.rtmsg_src, home_addr);
++	rtmsg.rtmsg_src_len = 128;
++	rtmsg.rtmsg_flags = RTF_UP | RTF_DEFAULT;
++	rtmsg.rtmsg_ifindex = tdev->ifindex;
++	rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++	if ((err = ip6_route_add(&rtmsg, NULL)) == -EEXIST) {
++		return 0;
++	}
++	return err;	
++}
++
++static __inline__ void del_reverse_route(struct in6_addr *ha_addr, 
++					 struct in6_addr *home_addr,
++					 struct net_device *tdev) 
++{
++	struct in6_rtmsg rtmsg;
++
++	DEBUG(DBG_INFO, "removing reverse route via tunnel device");
++
++	memset(&rtmsg, 0, sizeof(rtmsg));
++	ipv6_addr_copy(&rtmsg.rtmsg_src, home_addr);
++	rtmsg.rtmsg_src_len = 128;
++	rtmsg.rtmsg_ifindex = tdev->ifindex;
++	rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++	ip6_route_del(&rtmsg, NULL);
++}
++
++int mipv6_add_tnl_to_ha(void)
++{
++	struct ip6_tnl_parm p;
++	struct ip6_tnl *t;
++	int err;
++
++	DEBUG_FUNC();
++
++ 	memset(&p, 0, sizeof(p));
++	p.proto = IPPROTO_IPV6;
++	p.hop_limit = 255;
++	p.flags = (IP6_TNL_F_KERNEL_DEV | IP6_TNL_F_MIP6_DEV |
++		   IP6_TNL_F_IGN_ENCAP_LIMIT);
++	strcpy(p.name, "mip6mnha1");
++
++	rtnl_lock();
++	if ((err = ip6ip6_tnl_create(&p, &t))) {
++		rtnl_unlock();
++		return err;
++	}
++	spin_lock_bh(&mn_ha_lock);
++
++	if (!mn_ha_tdev) {
++		mn_ha_tdev = t->dev;
++		dev_hold(mn_ha_tdev);
++	}
++	spin_unlock_bh(&mn_ha_lock);
++	dev_open(t->dev);
++	rtnl_unlock();
++	return 0;
++} 
++
++int mipv6_mv_tnl_to_ha(struct in6_addr *ha_addr,
++		       struct in6_addr *coa,
++		       struct in6_addr *home_addr)
++{
++	int err = -ENODEV;
++
++	DEBUG_FUNC();
++
++	spin_lock_bh(&mn_ha_lock);
++	if (mn_ha_tdev) {
++		struct ip6_tnl_parm p;
++		memset(&p, 0, sizeof(p));
++		p.proto = IPPROTO_IPV6;
++		ipv6_addr_copy(&p.laddr, coa);
++		ipv6_addr_copy(&p.raddr, ha_addr);
++		p.hop_limit = 255;
++		p.flags = (IP6_TNL_F_KERNEL_DEV | IP6_TNL_F_MIP6_DEV |
++			   IP6_TNL_F_IGN_ENCAP_LIMIT);
++
++		ip6ip6_tnl_change((struct ip6_tnl *) mn_ha_tdev->priv, &p);
++		if (ipv6_addr_cmp(coa, home_addr)) {
++			err = add_reverse_route(ha_addr, home_addr, 
++						mn_ha_tdev);
++		} else {
++			del_reverse_route(ha_addr, home_addr, mn_ha_tdev);
++			err = 0;
++		}
++	}
++	spin_unlock_bh(&mn_ha_lock);
++	return err;
++}
++
++void mipv6_del_tnl_to_ha(void)
++{
++	struct net_device *dev;
++
++	DEBUG_FUNC();
++
++	rtnl_lock();
++	spin_lock_bh(&mn_ha_lock);
++	dev = mn_ha_tdev;
++	mn_ha_tdev = NULL;
++	spin_unlock_bh(&mn_ha_lock);
++	dev_put(dev);
++	unregister_netdevice(dev);
++	rtnl_unlock();
++}
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_mn.h linux-2.4.25/net/ipv6/mobile_ip6/tunnel_mn.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/tunnel_mn.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/tunnel_mn.h	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,14 @@
++#ifndef _TUNNEL_MN_H
++#define _TUNNEL_MN_H
++
++#include "tunnel.h"
++
++extern int mipv6_add_tnl_to_ha(void);
++
++extern int mipv6_mv_tnl_to_ha(struct in6_addr *ha_addr, 
++			      struct in6_addr *coa,
++			      struct in6_addr *home_addr);
++
++extern int mipv6_del_tnl_to_ha(void);
++
++#endif
+diff -uprN linux-2.4.25.old/net/ipv6/mobile_ip6/util.h linux-2.4.25/net/ipv6/mobile_ip6/util.h
+--- linux-2.4.25.old/net/ipv6/mobile_ip6/util.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.25/net/ipv6/mobile_ip6/util.h	2004-06-26 11:29:32.000000000 +0100
+@@ -0,0 +1,91 @@
++/*
++ *      MIPL Mobile IPv6 Utility functions
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _UTIL_H
++#define _UTIL_H
++
++#include <linux/in6.h>
++#include <asm/byteorder.h>
++
++/**
++ * mipv6_prefix_compare - Compare two IPv6 prefixes
++ * @addr: IPv6 address
++ * @prefix: IPv6 address
++ * @nprefix: number of bits to compare
++ *
++ * Perform prefix comparison bitwise for the @nprefix first bits
++ * Returns 1, if the prefixes are the same, 0 otherwise 
++ **/
++static inline int mipv6_prefix_compare(const struct in6_addr *addr,
++				       const struct in6_addr *prefix, 
++				       const unsigned int pfix_len)
++{
++	int i;
++	unsigned int nprefix = pfix_len;
++
++	if (nprefix > 128)
++		return 0;
++
++	for (i = 0; nprefix > 0; nprefix -= 32, i++) {
++		if (nprefix >= 32) {
++			if (addr->s6_addr32[i] != prefix->s6_addr32[i])
++				return 0;
++		} else {
++			if (((addr->s6_addr32[i] ^ prefix->s6_addr32[i]) &
++			     ((~0) << (32 - nprefix))) != 0)
++				return 0;
++			return 1;
++		}
++	}
++
++	return 1;
++}
++
++/**
++ * homeagent_anycast - Compute Home Agent anycast address
++ * @ac_addr: append home agent anycast suffix to passed prefix
++ * @prefix: prefix ha anycast address is generated from
++ * @plen: length of prefix in bits
++ *
++ * Calculate corresponding Home Agent Anycast Address (RFC2526) in a
++ * given subnet.
++ */
++static inline int 
++mipv6_ha_anycast(struct in6_addr *ac_addr, struct in6_addr *prefix, int plen)
++{
++	if (plen <= 0 || plen > 120)  {
++		/* error, interface id should be minimum 8 bits */
++		return -1;
++	}
++	ipv6_addr_copy(ac_addr, prefix);
++
++	if (plen < 32)
++		ac_addr->s6_addr32[0] |= htonl((u32)(~0) >> plen);
++	if (plen < 64)
++		ac_addr->s6_addr32[1] |= htonl((u32)(~0) >> (plen > 32 ? plen % 32 : 0));
++	if (plen < 92)
++		ac_addr->s6_addr32[2] |= htonl((u32)(~0) >> (plen > 64 ? plen % 32 : 0));
++	if (plen <= 120)
++		ac_addr->s6_addr32[3] |= htonl((u32)(~0) >> (plen > 92 ? plen % 32 : 0));
++
++	/* RFC2526: for interface identifiers in EUI-64
++	 * format, the universal/local bit in the interface
++	 * identifier MUST be set to 0. */
++	if (plen == 64) {
++		ac_addr->s6_addr32[2] &= (int)htonl(0xfdffffff);
++	}
++	/* Mobile IPv6 Home-Agents anycast id (0x7e) */
++	ac_addr->s6_addr32[3] &= (int)htonl(0xfffffffe);
++
++	return 0;
++}
++
++#endif /* _UTIL_H */
+diff -uprN linux-2.4.25.old/net/ipv6/ndisc.c linux-2.4.25/net/ipv6/ndisc.c
+--- linux-2.4.25.old/net/ipv6/ndisc.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/ndisc.c	2004-06-26 11:29:32.000000000 +0100
+@@ -23,6 +23,7 @@
+  *						and moved to net/core.
+  *	Pekka Savola			:	RFC2461 validation
+  *	YOSHIFUJI Hideaki @USAGI	:	Verify ND options properly
++ *	Ville Nuorvala			:	RFC2461 fixes to proxy ND
+  */
+ 
+ /* Set to 3 to get tracing... */
+@@ -70,6 +71,7 @@
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
+ #include <net/icmp.h>
++#include <net/mipglue.h>
+ 
+ #include <net/checksum.h>
+ #include <linux/proc_fs.h>
+@@ -187,6 +189,8 @@ struct ndisc_options *ndisc_parse_option
+ 		case ND_OPT_TARGET_LL_ADDR:
+ 		case ND_OPT_MTU:
+ 		case ND_OPT_REDIRECT_HDR:
++		case ND_OPT_RTR_ADV_INTERVAL:
++		case ND_OPT_HOME_AGENT_INFO:
+ 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
+ 				ND_PRINTK2((KERN_WARNING
+ 					    "ndisc_parse_options(): duplicated ND6 option found: type=%d\n",
+@@ -372,8 +376,8 @@ ndisc_build_ll_hdr(struct sk_buff *skb, 
+  */
+ 
+ void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
+-		   struct in6_addr *daddr, struct in6_addr *solicited_addr,
+-		   int router, int solicited, int override, int inc_opt) 
++		struct in6_addr *daddr, struct in6_addr *solicited_addr, 
++		int router, int solicited, int override, int inc_opt) 
+ {
+ 	static struct in6_addr tmpaddr;
+ 	struct inet6_ifaddr *ifp;
+@@ -766,7 +770,8 @@ void ndisc_recv_ns(struct sk_buff *skb)
+ 		int addr_type = ipv6_addr_type(saddr);
+ 
+ 		if (in6_dev && in6_dev->cnf.forwarding &&
+-		    (addr_type & IPV6_ADDR_UNICAST) &&
++		    (addr_type & IPV6_ADDR_UNICAST || 
++		     addr_type == IPV6_ADDR_ANY) &&
+ 		    pneigh_lookup(&nd_tbl, &msg->target, dev, 0)) {
+ 			int inc = ipv6_addr_type(daddr)&IPV6_ADDR_MULTICAST;
+ 
+@@ -778,13 +783,21 @@ void ndisc_recv_ns(struct sk_buff *skb)
+ 					nd_tbl.stats.rcv_probes_mcast++;
+ 				else
+ 					nd_tbl.stats.rcv_probes_ucast++;
+-					
+-				neigh = neigh_event_ns(&nd_tbl, lladdr, saddr, dev);
+ 
+-				if (neigh) {
+-					ndisc_send_na(dev, neigh, saddr, &msg->target,
+-						      0, 1, 0, 1);
+-					neigh_release(neigh);
++				if (addr_type & IPV6_ADDR_UNICAST) {		
++					neigh = neigh_event_ns(&nd_tbl, lladdr, saddr, dev);
++
++					if (neigh) {
++						ndisc_send_na(dev, neigh, saddr, &msg->target,
++						      	      0, 1, 0, 1);
++						neigh_release(neigh);
++					}
++				} else {
++					/* the proxy should also protect against DAD */
++					struct in6_addr maddr;
++					ipv6_addr_all_nodes(&maddr);
++					ndisc_send_na(dev, NULL, &maddr, &msg->target,
++						      0, 0, 0, 1);
+ 				}
+ 			} else {
+ 				struct sk_buff *n = skb_clone(skb, GFP_ATOMIC);
+@@ -849,6 +862,9 @@ void ndisc_recv_na(struct sk_buff *skb)
+ 		if (ifp->flags & IFA_F_TENTATIVE) {
+ 			addrconf_dad_failure(ifp);
+ 			return;
++		} else if (ndisc_mip_mn_ha_probe(ifp, lladdr)) {
++			in6_ifa_put(ifp);
++			return;
+ 		}
+ 		/* What should we make now? The advertisement
+ 		   is invalid, but ndisc specs say nothing
+@@ -887,6 +903,7 @@ void ndisc_recv_na(struct sk_buff *skb)
+ 			     msg->icmph.icmp6_override, 1);
+ 		neigh_release(neigh);
+ 	}
++	ndisc_check_mipv6_dad(&msg->target);
+ }
+ 
+ static void ndisc_router_discovery(struct sk_buff *skb)
+@@ -894,6 +911,7 @@ static void ndisc_router_discovery(struc
+         struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
+ 	struct neighbour *neigh;
+ 	struct inet6_dev *in6_dev;
++	int change_rtr;
+ 	struct rt6_info *rt;
+ 	int lifetime;
+ 	struct ndisc_options ndopts;
+@@ -923,10 +941,6 @@ static void ndisc_router_discovery(struc
+ 		ND_PRINTK1("RA: can't find in6 device\n");
+ 		return;
+ 	}
+-	if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_ra) {
+-		in6_dev_put(in6_dev);
+-		return;
+-	}
+ 
+ 	if (!ndisc_parse_options(opt, optlen, &ndopts)) {
+ 		in6_dev_put(in6_dev);
+@@ -935,7 +949,12 @@ static void ndisc_router_discovery(struc
+ 				   "ICMP6 RA: invalid ND option, ignored.\n");
+ 		return;
+ 	}
++	change_rtr = ndisc_mipv6_ra_rcv(skb, &ndopts);
+ 
++	if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_ra) {
++		in6_dev_put(in6_dev);
++		return;
++	}
+ 	if (in6_dev->if_flags & IF_RS_SENT) {
+ 		/*
+ 		 *	flag that an RA was received after an RS was sent
+@@ -963,8 +982,7 @@ static void ndisc_router_discovery(struc
+ 		ip6_del_rt(rt, NULL);
+ 		rt = NULL;
+ 	}
+-
+-	if (rt == NULL && lifetime) {
++	if (rt == NULL && lifetime && change_rtr) {
+ 		ND_PRINTK2("ndisc_rdisc: adding default router\n");
+ 
+ 		rt = rt6_add_dflt_router(&skb->nh.ipv6h->saddr, skb->dev);
+@@ -1087,6 +1105,8 @@ out:
+ 	if (rt)
+ 		dst_release(&rt->u.dst);
+ 	in6_dev_put(in6_dev);
++
++	ndisc_mipv6_change_router(change_rtr);
+ }
+ 
+ static void ndisc_redirect_rcv(struct sk_buff *skb)
+diff -uprN linux-2.4.25.old/net/ipv6/raw.c linux-2.4.25/net/ipv6/raw.c
+--- linux-2.4.25.old/net/ipv6/raw.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/raw.c	2004-06-26 11:29:32.000000000 +0100
+@@ -43,6 +43,7 @@
+ #include <net/transp_v6.h>
+ #include <net/udp.h>
+ #include <net/inet_common.h>
++#include <net/mipglue.h>
+ 
+ #include <net/rawv6.h>
+ 
+@@ -636,6 +637,7 @@ static int rawv6_sendmsg(struct sock *sk
+ 			hdr.daddr = daddr;
+ 		else
+ 			hdr.daddr = NULL;
++		hdr.daddr = mipv6_get_fake_hdr_daddr(hdr.daddr, daddr);
+ 
+ 		err = ip6_build_xmit(sk, rawv6_frag_cksum, &hdr, &fl, len,
+ 				     opt, hlimit, msg->msg_flags);
+diff -uprN linux-2.4.25.old/net/ipv6/route.c linux-2.4.25/net/ipv6/route.c
+--- linux-2.4.25.old/net/ipv6/route.c	2004-02-18 13:36:32.000000000 +0000
++++ linux-2.4.25/net/ipv6/route.c	2004-06-26 11:29:32.000000000 +0100
+@@ -49,6 +49,7 @@
+ #include <net/addrconf.h>
+ #include <net/tcp.h>
+ #include <linux/rtnetlink.h>
++#include <net/mipglue.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -363,12 +364,8 @@ static struct rt6_info *rt6_cow(struct r
+ 		rt->u.dst.flags |= DST_HOST;
+ 
+ #ifdef CONFIG_IPV6_SUBTREES
+-		if (rt->rt6i_src.plen && saddr) {
+-			ipv6_addr_copy(&rt->rt6i_src.addr, saddr);
+-			rt->rt6i_src.plen = 128;
+-		}
++		rt->rt6i_src.plen = ort->rt6i_src.plen;
+ #endif
+-
+ 		rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+ 
+ 		dst_hold(&rt->u.dst);
+@@ -511,14 +508,19 @@ struct dst_entry * ip6_route_output(stru
+ 	struct rt6_info *rt;
+ 	int strict;
+ 	int attempts = 3;
++	struct in6_addr *saddr;
+ 
++	if (ipv6_chk_addr(fl->nl_u.ip6_u.daddr, NULL))
++		saddr = NULL;
++	else
++		saddr = fl->nl_u.ip6_u.saddr;
++		
+ 	strict = ipv6_addr_type(fl->nl_u.ip6_u.daddr) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL);
+ 
+ relookup:
+ 	read_lock_bh(&rt6_lock);
+ 
+-	fn = fib6_lookup(&ip6_routing_table, fl->nl_u.ip6_u.daddr,
+-			 fl->nl_u.ip6_u.saddr);
++	fn = fib6_lookup(&ip6_routing_table, fl->nl_u.ip6_u.daddr, saddr);
+ 
+ restart:
+ 	rt = fn->leaf;
+@@ -663,25 +665,6 @@ out:
+ 	return (atomic_read(&ip6_dst_ops.entries) > ip6_rt_max_size);
+ }
+ 
+-/* Clean host part of a prefix. Not necessary in radix tree,
+-   but results in cleaner routing tables.
+-
+-   Remove it only when all the things will work!
+- */
+-
+-static void ipv6_addr_prefix(struct in6_addr *pfx,
+-			     const struct in6_addr *addr, int plen)
+-{
+-	int b = plen&0x7;
+-	int o = plen>>3;
+-
+-	memcpy(pfx->s6_addr, addr, o);
+-	if (o < 16)
+-		memset(pfx->s6_addr + o, 0, 16 - o);
+-	if (b != 0)
+-		pfx->s6_addr[o] = addr->s6_addr[o]&(0xff00 >> b);
+-}
+-
+ static int ipv6_get_mtu(struct net_device *dev)
+ {
+ 	int mtu = IPV6_MIN_MTU;
+@@ -810,7 +793,7 @@ int ip6_route_add(struct in6_rtmsg *rtms
+ 			if (!(gwa_type&IPV6_ADDR_UNICAST))
+ 				goto out;
+ 
+-			grt = rt6_lookup(gw_addr, NULL, rtmsg->rtmsg_ifindex, 1);
++			grt = rt6_lookup(gw_addr, &rtmsg->rtmsg_src, rtmsg->rtmsg_ifindex, 1);
+ 
+ 			err = -EHOSTUNREACH;
+ 			if (grt == NULL)
+@@ -848,7 +831,15 @@ int ip6_route_add(struct in6_rtmsg *rtms
+ 			goto out;
+ 		}
+ 	}
+-
++#ifdef USE_IPV6_MOBILITY
++        /* If destination is mobile node, add special skb->dst->input
++         * function for proxy ND.
++         */
++        if (rtmsg->rtmsg_flags & RTF_MOBILENODE) {
++                rt->u.dst.input = ip6_mipv6_forward;
++        }
++#endif /* CONFIG_IPV6_MOBILITY */
++	  
+ 	if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr))
+ 		rt->rt6i_hoplimit = IPV6_DEFAULT_MCASTHOPS;
+ 	else
+@@ -936,7 +927,7 @@ void rt6_redirect(struct in6_addr *dest,
+ 	struct rt6_info *rt, *nrt;
+ 
+ 	/* Locate old route to this destination. */
+-	rt = rt6_lookup(dest, NULL, neigh->dev->ifindex, 1);
++	rt = rt6_lookup(dest, saddr, neigh->dev->ifindex, 1);
+ 
+ 	if (rt == NULL)
+ 		return;
+@@ -1003,6 +994,9 @@ source_ok:
+ 	nrt = ip6_rt_copy(rt);
+ 	if (nrt == NULL)
+ 		goto out;
++#ifdef CONFIG_IPV6_SUBTREES
++	nrt->rt6i_src.plen = rt->rt6i_src.plen;
++#endif
+ 
+ 	nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE;
+ 	if (on_link)
+@@ -1104,6 +1098,9 @@ void rt6_pmtu_discovery(struct in6_addr 
+ 		nrt = ip6_rt_copy(rt);
+ 		if (nrt == NULL)
+ 			goto out;
++#ifdef CONFIG_IPV6_SUBTREES
++		nrt->rt6i_src.plen = rt->rt6i_src.plen;
++#endif
+ 		ipv6_addr_copy(&nrt->rt6i_dst.addr, daddr);
+ 		nrt->rt6i_dst.plen = 128;
+ 		nrt->u.dst.flags |= DST_HOST;
+diff -uprN linux-2.4.25.old/net/ipv6/tcp_ipv6.c linux-2.4.25/net/ipv6/tcp_ipv6.c
+--- linux-2.4.25.old/net/ipv6/tcp_ipv6.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/ipv6/tcp_ipv6.c	2004-06-26 11:29:32.000000000 +0100
+@@ -50,6 +50,7 @@
+ #include <net/addrconf.h>
+ #include <net/ip6_route.h>
+ #include <net/inet_ecn.h>
++#include <net/mipglue.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -557,6 +558,7 @@ static int tcp_v6_connect(struct sock *s
+ 	struct flowi fl;
+ 	struct dst_entry *dst;
+ 	int addr_type;
++	int reroute = 0;
+ 	int err;
+ 
+ 	if (addr_len < SIN6_LEN_RFC2133) 
+@@ -660,7 +662,7 @@ static int tcp_v6_connect(struct sock *s
+ 
+ 	fl.proto = IPPROTO_TCP;
+ 	fl.fl6_dst = &np->daddr;
+-	fl.fl6_src = saddr;
++	fl.fl6_src = saddr; 
+ 	fl.oif = sk->bound_dev_if;
+ 	fl.uli_u.ports.dport = usin->sin6_port;
+ 	fl.uli_u.ports.sport = sk->sport;
+@@ -669,31 +671,46 @@ static int tcp_v6_connect(struct sock *s
+ 		struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
+ 		fl.nl_u.ip6_u.daddr = rt0->addr;
+ 	}
+-
+ 	dst = ip6_route_output(sk, &fl);
+-
++#ifdef CONFIG_IPV6_SUBTREES
++	reroute = (saddr == NULL);
++#endif
+ 	if ((err = dst->error) != 0) {
+ 		dst_release(dst);
+ 		goto failure;
+ 	}
+-
+-	ip6_dst_store(sk, dst, NULL);
+-	sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
+-
++	if (!reroute) {
++		ip6_dst_store(sk, dst, NULL, NULL);
++		sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
++	}
+ 	if (saddr == NULL) {
+ 		err = ipv6_get_saddr(dst, &np->daddr, &saddr_buf);
++
++		if (reroute)
++			dst_release(dst);
+ 		if (err)
+ 			goto failure;
+ 
+ 		saddr = &saddr_buf;
++		ipv6_addr_copy(&np->rcv_saddr, saddr);
++#ifdef CONFIG_IPV6_SUBTREES
++		fl.fl6_src = saddr; 
++		dst = ip6_route_output(sk, &fl);
++
++		if ((err = dst->error) != 0) {
++			dst_release(dst);
++			goto failure;
++		}
++		ip6_dst_store(sk, dst, NULL, NULL);
++		sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
++#endif
+ 	}
+ 
+ 	/* set the source address */
+-	ipv6_addr_copy(&np->rcv_saddr, saddr);
+ 	ipv6_addr_copy(&np->saddr, saddr);
+ 	sk->rcv_saddr= LOOPBACK4_IPV6;
+ 
+-	tp->ext_header_len = 0;
++	tp->ext_header_len = tcp_v6_get_mipv6_header_len();
+ 	if (np->opt)
+ 		tp->ext_header_len = np->opt->opt_flen+np->opt->opt_nflen;
+ 	tp->mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr);
+@@ -1338,7 +1355,7 @@ static struct sock * tcp_v6_syn_recv_soc
+ #endif
+ 	MOD_INC_USE_COUNT;
+ 
+-	ip6_dst_store(newsk, dst, NULL);
++	ip6_dst_store(newsk, dst, NULL, NULL);
+ 	sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
+ 
+ 	newtp = &(newsk->tp_pinfo.af_tcp);
+@@ -1383,7 +1400,7 @@ static struct sock * tcp_v6_syn_recv_soc
+ 			sock_kfree_s(sk, opt, opt->tot_len);
+ 	}
+ 
+-	newtp->ext_header_len = 0;
++	newtp->ext_header_len = tcp_v6_get_mipv6_header_len();
+ 	if (np->opt)
+ 		newtp->ext_header_len = np->opt->opt_nflen + np->opt->opt_flen;
+ 
+@@ -1710,7 +1727,7 @@ static int tcp_v6_rebuild_header(struct 
+ 			return err;
+ 		}
+ 
+-		ip6_dst_store(sk, dst, NULL);
++		ip6_dst_store(sk, dst, NULL, NULL);
+ 		sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
+ 	}
+ 
+@@ -1749,7 +1766,7 @@ static int tcp_v6_xmit(struct sk_buff *s
+ 			return -sk->err_soft;
+ 		}
+ 
+-		ip6_dst_store(sk, dst, NULL);
++		ip6_dst_store(sk, dst, NULL, NULL);
+ 	}
+ 
+ 	skb->dst = dst_clone(dst);
+diff -uprN linux-2.4.25.old/net/ipv6/udp.c linux-2.4.25/net/ipv6/udp.c
+--- linux-2.4.25.old/net/ipv6/udp.c	2004-02-18 13:36:32.000000000 +0000
++++ linux-2.4.25/net/ipv6/udp.c	2004-06-26 11:29:32.000000000 +0100
+@@ -48,6 +48,7 @@
+ #include <net/ip.h>
+ #include <net/udp.h>
+ #include <net/inet_common.h>
++#include <net/mipglue.h>
+ 
+ #include <net/checksum.h>
+ 
+@@ -232,6 +233,7 @@ int udpv6_connect(struct sock *sk, struc
+ 	struct ip6_flowlabel	*flowlabel = NULL;
+ 	int			addr_type;
+ 	int			err;
++	int			reroute = 0;
+ 
+ 	if (usin->sin6_family == AF_INET) {
+ 		if (__ipv6_only_sock(sk))
+@@ -331,7 +333,7 @@ ipv4_connected:
+ 
+ 	fl.proto = IPPROTO_UDP;
+ 	fl.fl6_dst = &np->daddr;
+-	fl.fl6_src = &saddr;
++	fl.fl6_src = NULL;
+ 	fl.oif = sk->bound_dev_if;
+ 	fl.uli_u.ports.dport = sk->dport;
+ 	fl.uli_u.ports.sport = sk->sport;
+@@ -348,29 +350,44 @@ ipv4_connected:
+ 		struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
+ 		fl.fl6_dst = rt0->addr;
+ 	}
+-
+ 	dst = ip6_route_output(sk, &fl);
+-
+ 	if ((err = dst->error) != 0) {
+ 		dst_release(dst);
+ 		fl6_sock_release(flowlabel);
+-		return err;
+-	}
+-
+-	ip6_dst_store(sk, dst, fl.fl6_dst);
+-
++		return err; 
++	} 
++#ifdef CONFIG_IPV6_SUBTREES
++	reroute = (fl.fl6_src == NULL);
++#endif
+ 	/* get the source adddress used in the apropriate device */
+ 
+ 	err = ipv6_get_saddr(dst, daddr, &saddr);
+ 
++	if (reroute)
++		dst_release(dst);
++
+ 	if (err == 0) {
+-		if(ipv6_addr_any(&np->saddr))
++#ifdef CONFIG_IPV6_SUBTREES
++		if (reroute) {
++			fl.fl6_src = &saddr;
++			dst = ip6_route_output(sk, &fl);
++			if ((err = dst->error) != 0) {
++				dst_release(dst);
++				fl6_sock_release(flowlabel);
++				return err; 
++			} 
++		}
++#endif
++		if(ipv6_addr_any(&np->saddr)) {
+ 			ipv6_addr_copy(&np->saddr, &saddr);
+-
++			fl.fl6_src = &np->saddr;
++		}
+ 		if(ipv6_addr_any(&np->rcv_saddr)) {
+ 			ipv6_addr_copy(&np->rcv_saddr, &saddr);
+ 			sk->rcv_saddr = LOOPBACK4_IPV6;
+ 		}
++		ip6_dst_store(sk, dst, fl.fl6_dst, 
++			      fl.fl6_src == &np->saddr ? fl.fl6_src : NULL);
+ 		sk->state = TCP_ESTABLISHED;
+ 	}
+ 	fl6_sock_release(flowlabel);
+@@ -894,6 +911,7 @@ static int udpv6_sendmsg(struct sock *sk
+ 		opt = fl6_merge_options(&opt_space, flowlabel, opt);
+ 	if (opt && opt->srcrt)
+ 		udh.daddr = daddr;
++	udh.daddr = mipv6_get_fake_hdr_daddr(udh.daddr, daddr);
+ 
+ 	udh.uh.source = sk->sport;
+ 	udh.uh.len = len < 0x10000 ? htons(len) : 0;
+diff -uprN linux-2.4.25.old/net/netsyms.c linux-2.4.25/net/netsyms.c
+--- linux-2.4.25.old/net/netsyms.c	2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.25/net/netsyms.c	2004-06-26 11:29:32.000000000 +0100
+@@ -190,6 +190,7 @@ EXPORT_SYMBOL(neigh_sysctl_register);
+ #endif
+ EXPORT_SYMBOL(pneigh_lookup);
+ EXPORT_SYMBOL(pneigh_enqueue);
++EXPORT_SYMBOL(pneigh_delete);
+ EXPORT_SYMBOL(neigh_destroy);
+ EXPORT_SYMBOL(neigh_parms_alloc);
+ EXPORT_SYMBOL(neigh_parms_release);
diff --git a/recipes/linux/files/mipv6-1.1-v2.4.27.patch b/recipes/linux/files/mipv6-1.1-v2.4.27.patch
new file mode 100644
index 0000000000..b8fb071d28
--- /dev/null
+++ b/recipes/linux/files/mipv6-1.1-v2.4.27.patch
@@ -0,0 +1,19736 @@
+
+#
+# Patch managed by http://www.holgerschurig.de/patcher.html
+#
+
+--- linux-2.4.27/Documentation/Configure.help~mipv6-1.1-v2.4.26
++++ linux-2.4.27/Documentation/Configure.help
+@@ -6308,6 +6308,57 @@
+ 
+   It is safe to say N here for now.
+ 
++IPv6: IPv6 over IPv6 Tunneling (EXPERIMENTAL)
++CONFIG_IPV6_TUNNEL
++  Experimental IP6-IP6 tunneling.  You must select this, if you want
++  to use CONFIG_IPV6_MOBILITY.  More information in MIPL Mobile IPv6
++  instructions.
++
++  If you don't want IP6-IP6 tunnels and Mobile IPv6, say N.
++
++IPv6: Mobility Support (EXPERIMENTAL)
++CONFIG_IPV6_MOBILITY
++  This is experimental support for the upcoming specification of
++  Mobile IPv6. Mobile IPv6 allows nodes to seamlessly move between
++  networks without changing their IP addresses, thus allowing them to
++  maintain upper layer connections (e.g. TCP).  Selecting this option
++  allows your computer to act as a Correspondent Node (CN).  A MIPv6
++  Mobile Node will be able to communicate with the CN and use route
++  optimization.
++
++  For more information and configuration details, see
++  http://www.mipl.mediapoli.com/.
++
++  If unsure, say N.
++
++MIPv6: Mobile Node Support
++CONFIG_IPV6_MOBILITY_MN
++  If you want your computer to be a MIPv6 Mobile Node (MN), select
++  this option.  You must configure MN using the userspace tools
++  available at http://www.mipl.mediapoli.com/download/mipv6-tools/.
++
++  If your computer is stationary, or you are unsure if you need this,
++  say N.  Note that you will need a properly configured MIPv6 Home
++  Agent to use any Mobile Nodes.
++
++MIPv6: Home Agent Support
++CONFIG_IPV6_MOBILITY_HA
++  If you want your router to serve as a MIPv6 Home Agent (HA), select
++  this option.  You must configure HA using the userspace tools
++  available at http://www.mipl.mediapoli.com/download/mipv6-tools/.
++
++  If your computer is not a router, or you are unsure if you need
++  this, say N.
++
++MIPv6: Debug messages
++CONFIG_IPV6_MOBILITY_DEBUG
++  MIPL Mobile IPv6 can produce a lot of debugging messages. There are
++  eight debug levels (0 through 7) and the level is controlled via
++  /proc/sys/net/ipv6/mobility/debuglevel. Since MIPL is still
++  experimental, you might want to say Y here.
++
++  Be sure to say Y and record debug messages when submitting a bug
++  report.
+ The SCTP Protocol (EXPERIMENTAL)
+ CONFIG_IP_SCTP
+   Stream Control Transmission Protocol
+--- linux-2.4.27/Documentation/DocBook/Makefile~mipv6-1.1-v2.4.26
++++ linux-2.4.27/Documentation/DocBook/Makefile
+@@ -2,7 +2,7 @@
+ 	   kernel-api.sgml parportbook.sgml kernel-hacking.sgml \
+ 	   kernel-locking.sgml via-audio.sgml mousedrivers.sgml sis900.sgml \
+ 	   deviceiobook.sgml procfs-guide.sgml tulip-user.sgml \
+-	   journal-api.sgml libata.sgml
++	   journal-api.sgml libata.sgml mip6-func.sgml
+ 
+ PS	:=	$(patsubst %.sgml, %.ps, $(BOOKS))
+ PDF	:=	$(patsubst %.sgml, %.pdf, $(BOOKS))
+@@ -96,6 +96,9 @@
+ procfs-guide.sgml:  procfs-guide.tmpl procfs_example.sgml
+ 	$(TOPDIR)/scripts/docgen < procfs-guide.tmpl >$@
+ 
++mip6-func.sgml: mip6-func.tmpl
++	$(TOPDIR)/scripts/docgen <$< >$@
++
+ APISOURCES :=	$(TOPDIR)/drivers/media/video/videodev.c \
+ 		$(TOPDIR)/arch/i386/kernel/irq.c \
+ 		$(TOPDIR)/arch/i386/kernel/mca.c \
+--- /dev/null
++++ linux-2.4.27/Documentation/DocBook/mip6-func.tmpl
+@@ -0,0 +1,756 @@
++<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook V3.1//EN"[]>
++<book id="LinuxMobileIPv6">
++ <bookinfo>
++  <title>MIPL Mobile IPv6 Function Reference Guide</title>
++
++  <authorgroup>
++    <author>
++      <othername>MIPL Mobile IPv6 for Linux Team</othername>
++      <affiliation>
++       <orgname>Helsinki University of Technology</orgname>
++       <orgdiv>Telecommunications Software and Multimedia Lab</orgdiv>
++       <address>
++        <pob>PO BOX 9201</pob>
++	<postcode>FIN-02015 HUT</postcode>
++	<country>Finland</country>
++        <email>mipl@list.mipl.mediapoli.com</email>
++       </address>
++      </affiliation>
++     </author>
++  </authorgroup>
++
++  <copyright>
++   <year>2000-2001</year>
++   <holder>Helsinki University of Technology</holder>
++  </copyright>
++ 
++  <legalnotice>
++   <para>
++     Copyright (c) 2001, 2002 MIPL Mobile IPv6 for Linux Team.
++   </para>
++   <para>
++     Permission is granted to copy, distribute and/or modify this
++     document under the terms of the GNU Free Documentation License,
++     Version 1.1 published by the Free Software Foundation; with the
++     Invariant Sections being "Introduction", with the Front-Cover
++     Texts being "MIPL Mobile IPv6 Function Reference Guide", "MIPL
++     Mobile IPv6 for Linux Team" and "Helsinki University of
++     Technology".  A copy of the license is included in <xref
++     linkend="gfdl">.
++   </para>
++      
++  </legalnotice>
++ </bookinfo>
++
++<toc></toc>
++
++  <preface id="intro">
++     <title>Introduction</title>
++
++     <para>
++       MIPL Mobile IPv6 for Linux is an implementation of Mobility
++       Support in IPv6 IETF mobile-ip working groups Internet-Draft
++       (draft-ietf-mobileip-ipv6).  This implementation has been
++       developed in the Telecommunications Software and Multimedia
++       Laboratory at Helsinki University of Technology.
++     </para>
++
++     <para>
++       MIPL is fully open source, licensed under the GNU General
++       Public License.  Latest source for MIPL can be downloaded from
++       the MIPL website at:
++     </para>
++     <programlisting>
++       http://www.mipl.mediapoli.com/.
++     </programlisting>
++     <para>
++       Developers and users interested in MIPL can subscribe to the
++       MIPL mailing list by sending e-mail to
++       <email>majordomo@list.mipl.mediapoli.com</email> with
++     </para>
++     <programlisting>
++       subscribe mipl
++     </programlisting>
++     <para>
++       in the body of the message.
++     </para>
++
++     <para>
++       This document is a reference guide to MIPL functions.  Intended
++       audience is developers wishing to contribute to the project.
++       Hopefully this document will make it easier and quicker to
++       understand and adopt the inner workings of MIPL Mobile IPv6.
++     </para>
++
++     <para>
++       MIPL Mobile IPv6 for Linux Team members (past and present):
++
++       <itemizedlist>
++        <listitem>
++	<address>
++	Sami Kivisaari <email>Sami.Kivisaari@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Niklas Kampe <email>Niklas.Kampe@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Juha Mynttinen <email>Juha.Mynttinen@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Toni Nykanen <email>Toni.Nykanen@iki.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Henrik Petander <email>Henrik.Petander@hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Antti Tuominen <email>ajtuomin@tml.hut.fi</email>
++	</address>
++        </listitem>
++       </itemizedlist>
++
++       <itemizedlist>
++        <listitem>
++	<address>
++	Marko Myllynen
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Ville Nuorvala <email>vnuorval@tcs.hut.fi</email>
++	</address>
++        </listitem>
++        <listitem>
++	<address>
++	Jaakko Laine <email>Jaakko.Laine@hut.fi</email>
++	</address>
++        </listitem>
++       </itemizedlist>
++     </para>
++
++  </preface>
++
++  <chapter id="common">
++     <title>Common functions for all entities</title>
++
++     <sect1><title>Low-level functions</title>
++     <para>
++       These functions implement memory allocation used by others.
++       Hashlist functions implement a linked list with hash lookup,
++       which is used with Binding Update List, Binding Cache, Home
++       Agents List etc.
++     </para>
++!Inet/ipv6/mobile_ip6/mempool.h
++!Inet/ipv6/mobile_ip6/hashlist.h
++     </sect1>
++
++     <sect1><title>Debug functions</title>
++     <para>
++       Debug and utility functions.  These functions are available if
++       <constant>CONFIG_IPV6_MOBILITY_DEBUG</constant> is set.
++       Otherwise macros expand to no operation.
++     </para>
++!Inet/ipv6/mobile_ip6/debug.h
++!Inet/ipv6/mobile_ip6/mipv6.c
++     </sect1>
++
++     <sect1><title>Extension Header functions</title>
++     <para>
++       These functions create and handle extension headers that are
++       specific to MIPv6.
++     </para>
++!Inet/ipv6/mobile_ip6/exthdrs.c
++     </sect1>
++
++     <sect1><title>Mobility Header functions</title>
++     <para>
++       MIPv6 specifies a new protocol called Mobility Header.
++       Mobility Header has several message types.  Messages may also
++       carry Mobility Options.  These functions are used to create and
++       handle Mobility Headers and Mobility Options.
++     </para>
++!Inet/ipv6/mobile_ip6/sendopts.c
++!Inet/ipv6/mobile_ip6/mh_recv.c
++!Inet/ipv6/mobile_ip6/auth_subopt.c
++     </sect1>
++
++     <sect1><title>Binding Cache</title>
++     <para>
++       All Mobile IPv6 entities have a binding cache.  These functions
++       provide easy manipulation of the binding cache.
++     </para>
++!Inet/ipv6/mobile_ip6/bcache.c
++     </sect1>
++
++     <sect1><title>Security</title>
++
++     <para>
++       These functions are common authentication functions and
++       implement Draft 13 style IPSec AH support for Binding Updates.
++     </para>
++!Inet/ipv6/mobile_ip6/ah_algo.c
++!Inet/ipv6/mobile_ip6/sadb.c
++!Inet/ipv6/mobile_ip6/ah.c
++     </sect1>
++
++     <sect1><title>Utility functions</title>
++
++     <para>
++       These functions are general utility functions commonly used by
++       all entities.
++     </para>
++!Inet/ipv6/mobile_ip6/util.c
++     </sect1>
++
++  </chapter>
++
++  <chapter id="mn">
++     <title>Mobile Node functions</title>
++     <sect1><title>General functions</title>
++     <para>
++     </para>
++!Inet/ipv6/mobile_ip6/mn.c
++     </sect1>
++
++     <sect1><title>Binding Update List</title>
++     <para>
++       Mobile Node keeps track of sent binding updates in Binding
++       Update List.
++     </para>
++!Inet/ipv6/mobile_ip6/bul.c
++     </sect1>
++
++     <sect1><title>Movement detection</title>
++
++     <para>
++       These functions are used by the mobile node for movement
++       detection.
++     </para>
++!Inet/ipv6/mobile_ip6/mdetect.c
++     </sect1>
++  </chapter>
++
++  <chapter id="ha">
++     <title>Home Agent functions</title>
++     <sect1><title>General functions</title>
++     <para>
++     </para>
++!Inet/ipv6/mobile_ip6/ha.c
++     </sect1>
++
++     <sect1><title>Duplicate Address Detection functions</title>
++     <para>
++       Home Agent does Duplicate Address Detection for Mobile Nodes'
++       addresses.  These functions implement MIPv6 specific DAD
++       functionality.
++     </para>
++!Inet/ipv6/mobile_ip6/dad.c
++     </sect1>
++
++  </chapter>
++  <appendix id="gfdl">
++     <title>GNU Free Documentation License</title>
++
++     <para>
++       Version 1.1, March 2000
++     </para>
++
++     <programlisting>
++       Copyright (C) 2000  Free Software Foundation, Inc.
++       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++       Everyone is permitted to copy and distribute verbatim copies
++       of this license document, but changing it is not allowed.
++     </programlisting>
++
++     <sect1><title>0. PREAMBLE</title>
++
++     <para>
++       The purpose of this License is to make a manual, textbook, or
++       other written document "free" in the sense of freedom: to
++       assure everyone the effective freedom to copy and redistribute
++       it, with or without modifying it, either commercially or
++       noncommercially. Secondarily, this License preserves for the
++       author and publisher a way to get credit for their work, while
++       not being considered responsible for modifications made by
++       others.
++     </para>
++
++     <para>
++       This License is a kind of "copyleft", which means that
++       derivative works of the document must themselves be free in the
++       same sense. It complements the GNU General Public License,
++       which is a copyleft license designed for free software.
++     </para>
++
++     <para>
++       We have designed this License in order to use it for manuals
++       for free software, because free software needs free
++       documentation: a free program should come with manuals
++       providing the same freedoms that the software does. But this
++       License is not limited to software manuals; it can be used for
++       any textual work, regardless of subject matter or whether it is
++       published as a printed book. We recommend this License
++       principally for works whose purpose is instruction or
++       reference.
++     </para>
++
++     </sect1>
++     <sect1><title>1. APPLICABILITY AND DEFINITIONS</title>
++
++     <para>
++       This License applies to any manual or other work that contains
++       a notice placed by the copyright holder saying it can be
++       distributed under the terms of this License. The "Document",
++       below, refers to any such manual or work. Any member of the
++       public is a licensee, and is addressed as "you".
++     </para>
++
++     <para>
++       A "Modified Version" of the Document means any work containing
++       the Document or a portion of it, either copied verbatim, or
++       with modifications and/or translated into another language.
++     </para>
++
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++       A "Secondary Section" is a named appendix or a front-matter
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++     </para>
++
++     <para>
++       The "Invariant Sections" are certain Secondary Sections whose
++       titles are designated, as being those of Invariant Sections, in
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++     <para>
++       The "Cover Texts" are certain short passages of text that are
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++       A "Transparent" copy of the Document means a machine-readable
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++     <para>
++       Examples of suitable formats for Transparent copies include
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++       format, SGML or XML using a publicly available DTD, and
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++     </para>
++
++     <para>
++       The "Title Page" means, for a printed book, the title page
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++       beginning of the body of the text.
++     </para>
++
++     </sect1>
++     <sect1><title>2. VERBATIM COPYING</title>
++
++     <para>
++       You may copy and distribute the Document in any medium, either
++       commercially or noncommercially, provided that this License,
++       the copyright notices, and the license notice saying this
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++       and that you add no other conditions whatsoever to those of
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++       control the reading or further copying of the copies you make
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++       for copies. If you distribute a large enough number of copies
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++     </para>
++
++     <para>
++       You may also lend copies, under the same conditions stated
++       above, and you may publicly display copies.
++     </para>
++
++     </sect1>
++     <sect1><title>3. COPYING IN QUANTITY</title>
++
++     <para>
++       If you publish printed copies of the Document numbering more
++       than 100, and the Document's license notice requires Cover
++       Texts, you must enclose the copies in covers that carry,
++       clearly and legibly, all these Cover Texts: Front-Cover Texts
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++       as they preserve the title of the Document and satisfy these
++       conditions, can be treated as verbatim copying in other
++       respects.
++     </para>
++
++     <para>
++       If the required texts for either cover are too voluminous to
++       fit legibly, you should put the first ones listed (as many as
++       fit reasonably) on the actual cover, and continue the rest onto
++       adjacent pages.
++     </para>
++
++     <para>
++       If you publish or distribute Opaque copies of the Document
++       numbering more than 100, you must either include a
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++     </para>
++
++     <para>
++       It is requested, but not required, that you contact the authors
++       of the Document well before redistributing any large number of
++       copies, to give them a chance to provide you with an updated
++       version of the Document.
++     </para>
++
++     </sect1>
++     <sect1><title>4. MODIFICATIONS</title>
++
++     <para>
++       You may copy and distribute a Modified Version of the Document
++       under the conditions of sections 2 and 3 above, provided that
++       you release the Modified Version under precisely this License,
++       with the Modified Version filling the role of the Document,
++       thus licensing distribution and modification of the Modified
++       Version to whoever possesses a copy of it. In addition, you
++       must do these things in the Modified Version:
++     </para>
++
++     <para>
++      <itemizedlist spacing=compact>
++       <listitem>
++        <para>
++        A. Use in the Title Page (and on the covers, if any) a title
++        distinct from that of the Document, and from those of previous
++        versions (which should, if there were any, be listed in the
++        History section of the Document). You may use the same title
++        as a previous version if the original publisher of that
++        version gives permission.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	B. List on the Title Page, as authors, one or more persons
++	or entities responsible for authorship of the modifications in
++	the Modified Version, together with at least five of the
++	principal authors of the Document (all of its principal
++	authors, if it has less than five).
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	C. State on the Title page the name of the publisher of the
++	Modified Version, as the publisher.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	D. Preserve all the copyright notices of the Document.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	E. Add an appropriate copyright notice for your
++	modifications adjacent to the other copyright notices.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	F. Include, immediately after the copyright notices, a
++	license notice giving the public permission to use the
++	Modified Version under the terms of this License, in the form
++	shown in the Addendum below.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	G. Preserve in that license notice the full lists of
++	Invariant Sections and required Cover Texts given in the
++	Document's license notice.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	H. Include an unaltered copy of this License.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	I. Preserve the section entitled "History", and its title,
++	and add to it an item stating at least the title, year, new
++	authors, and publisher of the Modified Version as given on the
++	Title Page. If there is no section entitled "History" in the
++	Document, create one stating the title, year, authors, and
++	publisher of the Document as given on its Title Page, then add
++	an item describing the Modified Version as stated in the
++	previous sentence.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++        J. Preserve the network location, if any, given in the
++        Document for public access to a Transparent copy of the
++        Document, and likewise the network locations given in the
++        Document for previous versions it was based on. These may be
++        placed in the "History" section. You may omit a network
++        location for a work that was published at least four years
++        before the Document itself, or if the original publisher of
++        the version it refers to gives permission.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++        K. In any section entitled "Acknowledgements" or
++        "Dedications", preserve the section's title, and preserve in
++        the section all the substance and tone of each of the
++        contributor acknowledgements and/or dedications given therein.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	L. Preserve all the Invariant Sections of the Document,
++	unaltered in their text and in their titles. Section numbers
++	or the equivalent are not considered part of the section
++	titles.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	M. Delete any section entitled "Endorsements". Such a
++	section may not be included in the Modified Version.
++	</para>
++       </listitem>
++       <listitem>
++        <para>
++	N. Do not retitle any existing section as "Endorsements" or
++	to conflict in title with any Invariant Section.
++	</para>
++       </listitem>
++      </itemizedlist>
++     </para>
++
++     <para>
++       If the Modified Version includes new front-matter sections or
++       appendices that qualify as Secondary Sections and contain no
++       material copied from the Document, you may at your option
++       designate some or all of these sections as invariant. To do
++       this, add their titles to the list of Invariant Sections in the
++       Modified Version's license notice. These titles must be
++       distinct from any other section titles.
++     </para>
++
++     <para>
++       You may add a section entitled "Endorsements", provided it
++       contains nothing but endorsements of your Modified Version by
++       various parties--for example, statements of peer review or that
++       the text has been approved by an organization as the
++       authoritative definition of a standard.
++     </para>
++
++     <para>
++       You may add a passage of up to five words as a Front-Cover
++       Text, and a passage of up to 25 words as a Back-Cover Text, to
++       the end of the list of Cover Texts in the Modified
++       Version. Only one passage of Front-Cover Text and one of
++       Back-Cover Text may be added by (or through arrangements made
++       by) any one entity. If the Document already includes a cover
++       text for the same cover, previously added by you or by
++       arrangement made by the same entity you are acting on behalf
++       of, you may not add another; but you may replace the old one,
++       on explicit permission from the previous publisher that added
++       the old one.
++     </para>
++
++     <para>
++       The author(s) and publisher(s) of the Document do not by this
++       License give permission to use their names for publicity for or
++       to assert or imply endorsement of any Modified Version.
++     </para>
++
++     </sect1>
++     <sect1><title>5. COMBINING DOCUMENTS</title>
++
++     <para>
++       You may combine the Document with other documents released
++       under this License, under the terms defined in section 4 above
++       for modified versions, provided that you include in the
++       combination all of the Invariant Sections of all of the
++       original documents, unmodified, and list them all as Invariant
++       Sections of your combined work in its license notice.
++     </para>
++
++     <para>
++       The combined work need only contain one copy of this License,
++       and multiple identical Invariant Sections may be replaced with
++       a single copy. If there are multiple Invariant Sections with
++       the same name but different contents, make the title of each
++       such section unique by adding at the end of it, in parentheses,
++       the name of the original author or publisher of that section if
++       known, or else a unique number. Make the same adjustment to the
++       section titles in the list of Invariant Sections in the license
++       notice of the combined work.
++     </para>
++
++     <para>
++       In the combination, you must combine any sections entitled
++       "History" in the various original documents, forming one
++       section entitled "History"; likewise combine any sections
++       entitled "Acknowledgements", and any sections entitled
++       "Dedications". You must delete all sections entitled
++       "Endorsements."
++     </para>
++
++     </sect1>
++     <sect1><title>6. COLLECTIONS OF DOCUMENTS</title>
++
++     <para>
++       You may make a collection consisting of the Document and other
++       documents released under this License, and replace the
++       individual copies of this License in the various documents with
++       a single copy that is included in the collection, provided that
++       you follow the rules of this License for verbatim copying of
++       each of the documents in all other respects.
++     </para>
++
++     <para>
++       You may extract a single document from such a collection, and
++       distribute it individually under this License, provided you
++       insert a copy of this License into the extracted document, and
++       follow this License in all other respects regarding verbatim
++       copying of that document.
++     </para>
++
++     </sect1>
++     <sect1><title>7. AGGREGATION WITH INDEPENDENT WORKS</title>
++
++     <para>
++       A compilation of the Document or its derivatives with other
++       separate and independent documents or works, in or on a volume
++       of a storage or distribution medium, does not as a whole count
++       as a Modified Version of the Document, provided no compilation
++       copyright is claimed for the compilation. Such a compilation is
++       called an "aggregate", and this License does not apply to the
++       other self-contained works thus compiled with the Document, on
++       account of their being thus compiled, if they are not
++       themselves derivative works of the Document.
++     </para>
++
++     <para>
++       If the Cover Text requirement of section 3 is applicable to
++       these copies of the Document, then if the Document is less than
++       one quarter of the entire aggregate, the Document's Cover Texts
++       may be placed on covers that surround only the Document within
++       the aggregate. Otherwise they must appear on covers around the
++       whole aggregate.
++     </para>
++
++     </sect1>
++     <sect1><title>8. TRANSLATION</title>
++
++     <para>
++       Translation is considered a kind of modification, so you may
++       distribute translations of the Document under the terms of
++       section 4. Replacing Invariant Sections with translations
++       requires special permission from their copyright holders, but
++       you may include translations of some or all Invariant Sections
++       in addition to the original versions of these Invariant
++       Sections. You may include a translation of this License
++       provided that you also include the original English version of
++       this License. In case of a disagreement between the translation
++       and the original English version of this License, the original
++       English version will prevail.
++     </para>
++
++     </sect1>
++     <sect1><title>9. TERMINATION</title>
++
++     <para>
++       You may not copy, modify, sublicense, or distribute the
++       Document except as expressly provided for under this
++       License. Any other attempt to copy, modify, sublicense or
++       distribute the Document is void, and will automatically
++       terminate your rights under this License. However, parties who
++       have received copies, or rights, from you under this License
++       will not have their licenses terminated so long as such parties
++       remain in full compliance.
++     </para>
++
++     </sect1>
++     <sect1><title>10. FUTURE REVISIONS OF THIS LICENSE</title>
++
++     <para>
++       The Free Software Foundation may publish new, revised versions
++       of the GNU Free Documentation License from time to time. Such
++       new versions will be similar in spirit to the present version,
++       but may differ in detail to address new problems or
++       concerns. See http://www.gnu.org/copyleft/.
++     </para>
++
++     <para>
++       Each version of the License is given a distinguishing version
++       number. If the Document specifies that a particular numbered
++       version of this License "or any later version" applies to it,
++       you have the option of following the terms and conditions
++       either of that specified version or of any later version that
++       has been published (not as a draft) by the Free Software
++       Foundation. If the Document does not specify a version number
++       of this License, you may choose any version ever published (not
++       as a draft) by the Free Software Foundation.
++     </para>
++
++     </sect1>
++  </appendix>
++</book>
+--- linux-2.4.27/include/linux/icmpv6.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/icmpv6.h
+@@ -40,14 +40,16 @@
+                 struct icmpv6_nd_ra {
+ 			__u8		hop_limit;
+ #if defined(__LITTLE_ENDIAN_BITFIELD)
+-			__u8		reserved:6,
++			__u8		reserved:5,
++				        home_agent:1,
+ 					other:1,
+ 					managed:1;
+ 
+ #elif defined(__BIG_ENDIAN_BITFIELD)
+ 			__u8		managed:1,
+ 					other:1,
+-					reserved:6;
++				        home_agent:1,
++					reserved:5;
+ #else
+ #error	"Please fix <asm/byteorder.h>"
+ #endif
+@@ -70,6 +72,7 @@
+ #define icmp6_addrconf_managed	icmp6_dataun.u_nd_ra.managed
+ #define icmp6_addrconf_other	icmp6_dataun.u_nd_ra.other
+ #define icmp6_rt_lifetime	icmp6_dataun.u_nd_ra.rt_lifetime
++#define icmp6_home_agent	icmp6_dataun.u_nd_ra.home_agent
+ };
+ 
+ 
+--- linux-2.4.27/include/linux/if_arp.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/if_arp.h
+@@ -59,7 +59,7 @@
+ #define ARPHRD_RAWHDLC	518		/* Raw HDLC			*/
+ 
+ #define ARPHRD_TUNNEL	768		/* IPIP tunnel			*/
+-#define ARPHRD_TUNNEL6	769		/* IPIP6 tunnel			*/
++#define ARPHRD_TUNNEL6	769		/* IP6IP6 tunnel       		*/
+ #define ARPHRD_FRAD	770             /* Frame Relay Access Device    */
+ #define ARPHRD_SKIP	771		/* SKIP vif			*/
+ #define ARPHRD_LOOPBACK	772		/* Loopback device		*/
+--- linux-2.4.27/include/linux/in6.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/in6.h
+@@ -142,6 +142,11 @@
+ #define IPV6_TLV_JUMBO		194
+ 
+ /*
++ *	Mobile IPv6 TLV options.
++ */
++#define MIPV6_TLV_HOMEADDR	201
++
++/*
+  *	IPV6 socket options
+  */
+ 
+--- linux-2.4.27/include/linux/ipv6.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/ipv6.h
+@@ -29,6 +29,7 @@
+ 
+ #define IPV6_SRCRT_STRICT	0x01	/* this hop must be a neighbor	*/
+ #define IPV6_SRCRT_TYPE_0	0	/* IPv6 type 0 Routing Header	*/
++#define IPV6_SRCRT_TYPE_2	2	/*      type 2 for Mobile IPv6  */
+ 
+ /*
+  *	routing header
+@@ -71,6 +72,19 @@
+ 	struct in6_addr		addr[0];
+ 
+ #define rt0_type		rt_hdr.type
++
++};
++
++/*
++ *	routing header type 2
++ */
++
++struct rt2_hdr {
++	struct ipv6_rt_hdr	rt_hdr;
++	__u32			reserved;
++	struct in6_addr		addr;
++
++#define rt2_type		rt_hdr.type;
+ };
+ 
+ /*
+@@ -156,12 +170,16 @@
+ struct inet6_skb_parm
+ {
+ 	int			iif;
++	__u8			mipv6_flags;
+ 	__u16			ra;
+ 	__u16			hop;
+ 	__u16			auth;
+ 	__u16			dst0;
+ 	__u16			srcrt;
++	__u16			srcrt2;
++	__u16			hao;
+ 	__u16			dst1;
++	struct in6_addr		hoa;
+ };
+ 
+ #endif
+--- linux-2.4.27/include/linux/ipv6_route.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/ipv6_route.h
+@@ -33,6 +33,7 @@
+ #define RTF_CACHE	0x01000000	/* cache entry			*/
+ #define RTF_FLOW	0x02000000	/* flow significant route	*/
+ #define RTF_POLICY	0x04000000	/* policy route			*/
++#define RTF_MOBILENODE  0x10000000      /* for routing to Mobile Node   */
+ 
+ #define RTF_LOCAL	0x80000000
+ 
+--- /dev/null
++++ linux-2.4.27/include/linux/ipv6_tunnel.h
+@@ -0,0 +1,34 @@
++/*
++ * $Id$
++ */
++
++#ifndef _IPV6_TUNNEL_H
++#define _IPV6_TUNNEL_H
++
++#define IPV6_TLV_TNL_ENCAP_LIMIT 4
++#define IPV6_DEFAULT_TNL_ENCAP_LIMIT 4
++
++/* don't add encapsulation limit if one isn't present in inner packet */
++#define IP6_TNL_F_IGN_ENCAP_LIMIT 0x1
++/* copy the traffic class field from the inner packet */
++#define IP6_TNL_F_USE_ORIG_TCLASS 0x2
++/* copy the flowlabel from the inner packet */
++#define IP6_TNL_F_USE_ORIG_FLOWLABEL 0x4
++/* created and maintained from within the kernel */
++#define IP6_TNL_F_KERNEL_DEV 0x8
++/* being used for Mobile IPv6 */
++#define IP6_TNL_F_MIP6_DEV 0x10
++
++struct ip6_tnl_parm {
++	char name[IFNAMSIZ];	/* name of tunnel device */
++	int link;		/* ifindex of underlying L2 interface */
++	__u8 proto;		/* tunnel protocol */
++	__u8 encap_limit;	/* encapsulation limit for tunnel */
++	__u8 hop_limit;		/* hop limit for tunnel */
++	__u32 flowinfo;		/* traffic class and flowlabel for tunnel */
++	__u32 flags;		/* tunnel flags */
++	struct in6_addr laddr;	/* local tunnel end-point address */
++	struct in6_addr raddr;	/* remote tunnel end-point address */
++};
++
++#endif
+--- linux-2.4.27/include/linux/rtnetlink.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/rtnetlink.h
+@@ -315,6 +315,7 @@
+ 	IFA_BROADCAST,
+ 	IFA_ANYCAST,
+ 	IFA_CACHEINFO,
++	IFA_HOMEAGENT,
+ 	__IFA_MAX
+ };
+ 
+@@ -324,6 +325,7 @@
+ 
+ #define IFA_F_SECONDARY		0x01
+ 
++#define IFA_F_HOMEADDR		0x10
+ #define IFA_F_DEPRECATED	0x20
+ #define IFA_F_TENTATIVE		0x40
+ #define IFA_F_PERMANENT		0x80
+--- linux-2.4.27/include/linux/skbuff.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/skbuff.h
+@@ -177,7 +177,7 @@
+ 	 * want to keep them across layers you have to do a skb_clone()
+ 	 * first. This is owned by whoever has the skb queued ATM.
+ 	 */ 
+-	char		cb[48];	 
++	char		cb[64];	 
+ 
+ 	unsigned int 	len;			/* Length of actual data			*/
+  	unsigned int 	data_len;
+--- linux-2.4.27/include/linux/sysctl.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/linux/sysctl.h
+@@ -404,6 +404,23 @@
+ 	NET_IPV6_ICMP=19,
+ 	NET_IPV6_BINDV6ONLY=20,
+ 	NET_IPV6_MLD_MAX_MSF=25,
++	NET_IPV6_MOBILITY=26
++};
++
++/* /proc/sys/net/ipv6/mobility */
++enum {
++	NET_IPV6_MOBILITY_DEBUG=1,
++	NET_IPV6_MOBILITY_TUNNEL_SITELOCAL=2,
++	NET_IPV6_MOBILITY_ROUTER_SOLICITATION_MAX_SENDTIME=3,
++	NET_IPV6_MOBILITY_ROUTER_REACH=4,
++	NET_IPV6_MOBILITY_MDETECT_MECHANISM=5,
++	NET_IPV6_MOBILITY_RETROUT=6,
++	NET_IPV6_MOBILITY_MAX_TNLS=7,
++	NET_IPV6_MOBILITY_MIN_TNLS=8,
++	NET_IPV6_MOBILITY_BINDING_REFRESH=9,
++	NET_IPV6_MOBILITY_BU_F_LLADDR=10,
++	NET_IPV6_MOBILITY_BU_F_KEYMGM=11,
++	NET_IPV6_MOBILITY_BU_F_CN_ACK=12
+ };
+ 
+ enum {
+--- linux-2.4.27/include/net/addrconf.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/net/addrconf.h
+@@ -16,9 +16,11 @@
+ #if defined(__BIG_ENDIAN_BITFIELD)
+ 	__u8			onlink : 1,
+ 			 	autoconf : 1,
+-				reserved : 6;
++				router_address : 1,
++				reserved : 5;
+ #elif defined(__LITTLE_ENDIAN_BITFIELD)
+-	__u8			reserved : 6,
++	__u8			reserved : 5,
++				router_address : 1,
+ 				autoconf : 1,
+ 				onlink : 1;
+ #else
+@@ -55,6 +57,7 @@
+ 					      struct net_device *dev);
+ extern struct inet6_ifaddr *	ipv6_get_ifaddr(struct in6_addr *addr,
+ 						struct net_device *dev);
++extern void			ipv6_del_addr(struct inet6_ifaddr *ifp);
+ extern int			ipv6_get_saddr(struct dst_entry *dst, 
+ 					       struct in6_addr *daddr,
+ 					       struct in6_addr *saddr);
+@@ -85,7 +88,9 @@
+ extern void ipv6_mc_down(struct inet6_dev *idev);
+ extern void ipv6_mc_init_dev(struct inet6_dev *idev);
+ extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
++extern void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
+ extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
++extern void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+ 
+ extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
+ 		struct in6_addr *src_addr);
+@@ -116,6 +121,9 @@
+ extern int register_inet6addr_notifier(struct notifier_block *nb);
+ extern int unregister_inet6addr_notifier(struct notifier_block *nb);
+ 
++extern int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
++extern int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev);
++
+ static inline struct inet6_dev *
+ __in6_dev_get(struct net_device *dev)
+ {
+--- linux-2.4.27/include/net/ip6_route.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/net/ip6_route.h
+@@ -2,6 +2,7 @@
+ #define _NET_IP6_ROUTE_H
+ 
+ #define IP6_RT_PRIO_FW		16
++#define IP6_RT_PRIO_MIPV6      	64
+ #define IP6_RT_PRIO_USER	1024
+ #define IP6_RT_PRIO_ADDRCONF	256
+ #define IP6_RT_PRIO_KERN	512
+@@ -40,6 +41,9 @@
+ 
+ extern int			ip6_route_add(struct in6_rtmsg *rtmsg,
+ 					      struct nlmsghdr *);
++
++extern int			ip6_route_del(struct in6_rtmsg *rtmsg,
++					      struct nlmsghdr *);
+ extern int			ip6_del_rt(struct rt6_info *,
+ 					   struct nlmsghdr *);
+ 
+@@ -99,7 +103,8 @@
+  */
+ 
+ static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
+-				     struct in6_addr *daddr)
++				 struct in6_addr *daddr, 
++				 struct in6_addr *saddr)
+ {
+ 	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
+ 	struct rt6_info *rt = (struct rt6_info *) dst;
+@@ -107,6 +112,9 @@
+ 	write_lock(&sk->dst_lock);
+ 	__sk_dst_set(sk, dst);
+ 	np->daddr_cache = daddr;
++#ifdef CONFIG_IPV6_SUBTREES
++	np->saddr_cache = saddr;
++#endif
+ 	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
+ 	write_unlock(&sk->dst_lock);
+ }
+--- linux-2.4.27/include/net/ipv6.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/net/ipv6.h
+@@ -37,6 +37,7 @@
+ #define NEXTHDR_ICMP		58	/* ICMP for IPv6. */
+ #define NEXTHDR_NONE		59	/* No next header */
+ #define NEXTHDR_DEST		60	/* Destination options header. */
++#define NEXTHDR_MH		135	/* Mobility header, RFC 3775 */
+ 
+ #define NEXTHDR_MAX		255
+ 
+@@ -146,9 +147,12 @@
+ 	__u16			opt_flen;	/* after fragment hdr */
+ 	__u16			opt_nflen;	/* before fragment hdr */
+ 
++	__u8			mipv6_flags;	/* flags set by MIPv6 */
++
+ 	struct ipv6_opt_hdr	*hopopt;
+ 	struct ipv6_opt_hdr	*dst0opt;
+-	struct ipv6_rt_hdr	*srcrt;	/* Routing Header */
++	struct ipv6_rt_hdr	*srcrt;	/* Routing Header Type 0 */
++	struct ipv6_rt_hdr	*srcrt2; /* Routing Header Type 2 */
+ 	struct ipv6_opt_hdr	*auth;
+ 	struct ipv6_opt_hdr	*dst1opt;
+ 
+@@ -257,6 +261,38 @@
+ 		 a->s6_addr32[2] | a->s6_addr32[3] ) == 0); 
+ }
+ 
++static inline void ipv6_addr_prefix(struct in6_addr *pfx,
++				    const struct in6_addr *addr, int plen)
++{
++	/* caller must guarantee 0 <= plen <= 128 */
++	int o = plen >> 3,
++	    b = plen & 0x7;
++
++	memcpy(pfx->s6_addr, addr, o);
++	if (b != 0) {
++		pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
++		o++;
++	}
++	if (o < 16)
++		memset(pfx->s6_addr + o, 0, 16 - o);
++}
++
++static inline int ipv6_prefix_cmp(const struct in6_addr *p1,
++				  const struct in6_addr *p2, int plen)
++{
++	int b = plen&0x7;
++	int o = plen>>3;
++	int res = 0;
++
++	if (o > 0) 
++		res = memcmp(&p1->s6_addr[0], &p2->s6_addr[0], o);
++	if (res == 0 && b > 0) {
++		__u8 m = (0xff00 >> b) & 0xff;
++		res = (p1->s6_addr[o] & m) - (p2->s6_addr[o] & m);  
++	}
++	return res;
++}
++
+ /*
+  *	Prototypes exported by ipv6
+  */
+--- /dev/null
++++ linux-2.4.27/include/net/ipv6_tunnel.h
+@@ -0,0 +1,92 @@
++/*
++ * $Id$
++ */
++
++#ifndef _NET_IPV6_TUNNEL_H
++#define _NET_IPV6_TUNNEL_H
++
++#include <linux/ipv6.h>
++#include <linux/netdevice.h>
++#include <linux/ipv6_tunnel.h>
++#include <linux/skbuff.h>
++#include <asm/atomic.h>
++
++/* capable of sending packets */
++#define IP6_TNL_F_CAP_XMIT 0x10000
++/* capable of receiving packets */
++#define IP6_TNL_F_CAP_RCV 0x20000
++
++#define IP6_TNL_MAX 128
++
++/* IPv6 tunnel */
++
++struct ip6_tnl {
++	struct ip6_tnl *next;	/* next tunnel in list */
++	struct net_device *dev;	/* virtual device associated with tunnel */
++	struct net_device_stats stat;	/* statistics for tunnel device */
++	int recursion;		/* depth of hard_start_xmit recursion */
++	struct ip6_tnl_parm parms;	/* tunnel configuration paramters */
++	struct flowi fl;	/* flowi template for xmit */
++	atomic_t refcnt;        /* nr of identical tunnels used by kernel */
++	struct socket *sock;
++};
++
++#define IP6_TNL_PRE_ENCAP 0
++#define IP6_TNL_PRE_DECAP 1
++#define IP6_TNL_MAXHOOKS 2
++
++#define IP6_TNL_DROP 0
++#define IP6_TNL_ACCEPT 1
++
++typedef int ip6_tnl_hookfn(struct ip6_tnl *t, struct sk_buff *skb);
++
++struct ip6_tnl_hook_ops {
++	struct list_head list;
++	unsigned int hooknum;
++	int priority;
++	ip6_tnl_hookfn *hook;
++};
++
++enum ip6_tnl_hook_priorities {
++	IP6_TNL_PRI_FIRST = INT_MIN,
++	IP6_TNL_PRI_LAST = INT_MAX
++};
++
++/* Tunnel encapsulation limit destination sub-option */
++
++struct ipv6_tlv_tnl_enc_lim {
++	__u8 type;		/* type-code for option         */
++	__u8 length;		/* option length                */
++	__u8 encap_limit;	/* tunnel encapsulation limit   */
++} __attribute__ ((packed));
++
++#ifdef __KERNEL__
++extern int ip6ip6_tnl_create(struct ip6_tnl_parm *p, struct ip6_tnl **pt);
++
++extern struct ip6_tnl *ip6ip6_tnl_lookup(struct in6_addr *remote,
++					 struct in6_addr *local);
++
++void ip6ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p);
++
++extern int ip6ip6_kernel_tnl_add(struct ip6_tnl_parm *p);
++
++extern int ip6ip6_kernel_tnl_del(struct ip6_tnl *t);
++
++extern unsigned int ip6ip6_tnl_inc_max_kdev_count(unsigned int n);
++
++extern unsigned int ip6ip6_tnl_dec_max_kdev_count(unsigned int n);
++
++extern unsigned int ip6ip6_tnl_inc_min_kdev_count(unsigned int n);
++
++extern unsigned int ip6ip6_tnl_dec_min_kdev_count(unsigned int n);
++
++extern void ip6ip6_tnl_register_hook(struct ip6_tnl_hook_ops *reg);
++
++extern void ip6ip6_tnl_unregister_hook(struct ip6_tnl_hook_ops *reg);
++
++#ifdef CONFIG_IPV6_TUNNEL
++extern int __init ip6_tunnel_init(void);
++extern void ip6_tunnel_cleanup(void);
++#endif
++#endif
++#endif
+--- /dev/null
++++ linux-2.4.27/include/net/mipglue.h
+@@ -0,0 +1,266 @@
++/*
++ *	Glue for Mobility support integration to IPv6
++ *
++ *	Authors:
++ *	Antti Tuominen		<ajtuomin@cc.hut.fi>	
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#ifndef _NET_MIPGLUE_H
++#define _NET_MIPGLUE_H
++
++#ifndef USE_IPV6_MOBILITY
++#if defined(CONFIG_IPV6_MOBILITY) || defined(CONFIG_IPV6_MOBILITY_MODULE)
++#define USE_IPV6_MOBILITY
++#endif
++#endif
++
++/* symbols to indicate whether destination options received should take
++ * effect or not (see exthdrs.c, procrcv.c)
++ */
++#define MIPV6_DSTOPTS_ACCEPT 1
++#define MIPV6_DSTOPTS_DISCARD 0
++
++#define MIPV6_IGN_RTR 0
++#define MIPV6_ADD_RTR 1
++#define MIPV6_CHG_RTR 2
++
++/* MIPV6: Approximate maximum for mobile IPv6 options and headers */
++#define MIPV6_HEADERS 48
++
++#ifdef __KERNEL__
++#include <net/mipv6.h>
++#include <linux/slab.h>
++#include <net/ipv6.h>
++
++struct sk_buff;
++struct ndisc_options;
++struct sock;
++struct ipv6_txoptions;
++struct flowi;
++struct dst_entry;
++struct in6_addr;
++struct inet6_ifaddr;
++
++#ifdef USE_IPV6_MOBILITY
++
++/* calls a procedure from mipv6-module */
++#define MIPV6_CALLPROC(X) if(mipv6_functions.X) mipv6_functions.X
++
++/* calls a function from mipv6-module, default-value if function not defined
++ */
++#define MIPV6_CALLFUNC(X,Y) (!mipv6_functions.X)?(Y):mipv6_functions.X
++
++/* sets a handler-function to process a call */
++#define MIPV6_SETCALL(X,Y) if(mipv6_functions.X) printk("mipv6: Warning, function assigned twice!\n"); \
++                           mipv6_functions.X = Y
++#define MIPV6_RESETCALL(X) mipv6_functions.X = NULL
++
++/* pointers to mipv6 callable functions */
++struct mipv6_callable_functions {
++	void (*mipv6_initialize_dstopt_rcv) (struct sk_buff *skb);
++	int (*mipv6_finalize_dstopt_rcv) (int process);
++	int (*mipv6_handle_homeaddr) (struct sk_buff *skb, int optoff);
++	int (*mipv6_ra_rcv) (struct sk_buff *skb,
++			     struct ndisc_options *ndopts);
++	void (*mipv6_icmp_rcv) (struct sk_buff *skb);
++	struct ipv6_txoptions * (*mipv6_modify_txoptions) (
++		struct sock *sk,
++		struct sk_buff *skb, 
++		struct ipv6_txoptions *opt,
++		struct flowi *fl,
++		struct dst_entry **dst);
++	void (*mipv6_set_home) (int ifindex, struct in6_addr *homeaddr,
++				int plen, struct in6_addr *homeagent, 
++				int plen2);
++	void (*mipv6_get_home_address) (struct in6_addr *home_addr);
++	void (*mipv6_get_care_of_address)(struct in6_addr *homeaddr, 
++					  struct in6_addr *coa);
++	int (*mipv6_is_home_addr)(struct in6_addr *addr);
++	void (*mipv6_change_router)(void);
++	void (*mipv6_check_dad)(struct in6_addr *home_addr);      
++	void (*mipv6_icmp_swap_addrs)(struct sk_buff *skb);
++	int (*mipv6_forward)(struct sk_buff *skb);
++	int (*mipv6_mn_ha_probe)(struct inet6_ifaddr *ifp, u8 *lladdr);
++};
++
++extern struct mipv6_callable_functions mipv6_functions;
++
++extern void mipv6_invalidate_calls(void);
++
++extern int mipv6_handle_dstopt(struct sk_buff *skb, int optoff);
++
++static inline int
++ndisc_mip_mn_ha_probe(struct inet6_ifaddr *ifp, u8 *lladdr)
++{
++	return MIPV6_CALLFUNC(mipv6_mn_ha_probe, 0)(ifp, lladdr);
++}
++
++/* Must only be called for HA, no checks here */
++static inline int ip6_mipv6_forward(struct sk_buff *skb)
++{
++	return MIPV6_CALLFUNC(mipv6_forward, 0)(skb);
++}
++
++/* 
++ * Avoid adding new default routers if the old one is still in use 
++ */
++
++static inline int ndisc_mipv6_ra_rcv(struct sk_buff *skb,
++				     struct ndisc_options *ndopts)
++{
++	return MIPV6_CALLFUNC(mipv6_ra_rcv, MIPV6_ADD_RTR)(skb, ndopts);
++}
++
++static inline int ipv6_chk_mip_home_addr(struct in6_addr *addr)
++{
++	return MIPV6_CALLFUNC(mipv6_is_home_addr, 0)(addr);
++}
++
++static inline void ndisc_mipv6_change_router(int change_rtr)
++{
++	if (change_rtr == MIPV6_CHG_RTR)
++		MIPV6_CALLPROC(mipv6_change_router)();
++}
++
++static inline void ndisc_check_mipv6_dad(struct in6_addr *target)
++{
++	MIPV6_CALLPROC(mipv6_check_dad)(target);
++}
++
++static inline void icmpv6_swap_mipv6_addrs(struct sk_buff *skb)
++{
++	MIPV6_CALLPROC(mipv6_icmp_swap_addrs)(skb);
++}
++
++static inline void mipv6_icmp_rcv(struct sk_buff *skb)
++{
++	MIPV6_CALLPROC(mipv6_icmp_rcv)(skb);
++}
++
++static inline int tcp_v6_get_mipv6_header_len(void)
++{
++	return MIPV6_HEADERS;
++}
++
++static inline struct in6_addr *
++mipv6_get_fake_hdr_daddr(struct in6_addr *hdaddr, struct in6_addr *daddr)
++{
++	return daddr;
++}
++
++static inline void 
++addrconf_set_mipv6_mn_home(int ifindex, struct in6_addr *homeaddr, int plen,
++			   struct in6_addr *homeagent, int plen2)
++{
++	MIPV6_CALLPROC(mipv6_set_home)(ifindex, homeaddr, plen, homeagent, plen2);
++}
++
++static inline void addrconf_get_mipv6_home_address(struct in6_addr *saddr)
++{
++	MIPV6_CALLPROC(mipv6_get_home_address)(saddr);
++}
++
++static inline struct ipv6_txoptions *
++ip6_add_mipv6_txoptions(struct sock *sk, struct sk_buff *skb, 
++			struct ipv6_txoptions *opt, struct flowi *fl,
++			struct dst_entry **dst)
++{
++	return MIPV6_CALLFUNC(mipv6_modify_txoptions, opt)(sk, skb, opt, fl, dst); 
++
++}
++
++static inline void
++ip6_mark_mipv6_packet(struct ipv6_txoptions *txopt, struct sk_buff *skb)
++{
++	struct inet6_skb_parm *opt;
++	if (txopt) {
++		opt = (struct inet6_skb_parm *)skb->cb;
++		opt->mipv6_flags = txopt->mipv6_flags;
++	}
++}
++
++static inline void 
++ip6_free_mipv6_txoptions(struct ipv6_txoptions *opt,
++			 struct ipv6_txoptions *orig_opt) 
++{
++	if (opt && opt != orig_opt)
++		kfree(opt);
++}
++
++#else /* USE_IPV6_MOBILITY */
++
++#define mipv6_handle_dstopt ip6_tlvopt_unknown
++
++static inline int
++ndisc_mip_mn_ha_probe(struct inet6_ifaddr *ifp, u8 *lladdr)
++{
++	return 0;
++}
++
++static inline int ip6_mipv6_forward(struct sk_buff *skb)
++{
++	return 0;
++}
++
++static inline int ndisc_mipv6_ra_rcv(struct sk_buff *skb,
++				     struct ndisc_options *ndopts)
++{
++	return MIPV6_ADD_RTR;
++}
++
++static inline int ipv6_chk_mip_home_addr(struct in6_addr *addr)
++{
++	return 0;
++}
++
++static inline void ndisc_mipv6_change_router(int change_rtr) {}
++
++static inline void ndisc_check_mipv6_dad(struct in6_addr *target) {}
++
++static inline void icmpv6_swap_mipv6_addrs(struct sk_buff *skb) {}
++
++static inline void mipv6_icmp_rcv(struct sk_buff *skb) {}
++
++static inline int tcp_v6_get_mipv6_header_len(void)
++{
++	return 0;
++}
++
++static inline struct in6_addr *
++mipv6_get_fake_hdr_daddr(struct in6_addr *hdaddr, struct in6_addr *daddr)
++{
++	return hdaddr;
++}
++
++static inline void 
++addrconf_set_mipv6_mn_home(int ifindex, struct in6_addr *homeaddr, int plen,
++			   struct in6_addr *homeagent, int plen2) {}
++
++static inline void addrconf_get_mipv6_home_address(struct in6_addr *saddr) {}
++
++static inline struct ipv6_txoptions *
++ip6_add_mipv6_txoptions(struct sock *sk, struct sk_buff *skb,
++			struct ipv6_txoptions *opt, struct flowi *fl,
++			struct dst_entry **dst)
++{
++	return opt;
++}
++
++static inline void
++ip6_mark_mipv6_packet(struct ipv6_txoptions *txopt, struct sk_buff *skb) {}
++
++static inline void 
++ip6_free_mipv6_txoptions(struct ipv6_txoptions *opt, 
++			 struct ipv6_txoptions *orig_opt) {}
++
++#endif /* USE_IPV6_MOBILITY */
++#endif /* __KERNEL__ */
++#endif /* _NET_MIPGLUE_H */
+--- /dev/null
++++ linux-2.4.27/include/net/mipv6.h
+@@ -0,0 +1,258 @@
++/*
++ *	Mobile IPv6 header-file
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#ifndef _NET_MIPV6_H
++#define _NET_MIPV6_H
++
++#include <linux/types.h>
++#include <asm/byteorder.h>
++#include <linux/in6.h>
++
++/*
++ *
++ * Mobile IPv6 Protocol constants
++ *
++ */
++#define DHAAD_RETRIES			4	/* transmissions	*/
++#define INITIAL_BINDACK_TIMEOUT		1	/* seconds 		*/
++#define INITIAL_DHAAD_TIMEOUT		3	/* seconds		*/
++#define INITIAL_SOLICIT_TIMER		3	/* seconds		*/
++#define MAX_BINDACK_TIMEOUT		32 	/* seconds		*/
++#define MAX_NONCE_LIFE			240	/* seconds		*/
++#define MAX_TOKEN_LIFE			210	/* seconds		*/
++#define MAX_RR_BINDING_LIFE		420	/* seconds		*/
++#define MAX_UPDATE_RATE			3	/* 1/s (min delay=1s) 	*/
++#define PREFIX_ADV_RETRIES		3	/* transmissions	*/
++#define PREFIX_ADV_TIMEOUT		3	/* seconds		*/
++
++#define MAX_FAST_UPDATES		5 	/* transmissions	*/
++#define MAX_PFX_ADV_DELAY		1000	/* seconds		*/
++#define SLOW_UPDATE_RATE		10	/* 1/10s (max delay=10s)*/
++#define INITIAL_BINDACK_DAD_TIMEOUT	2	/* seconds		*/
++
++/*
++ *
++ * Mobile IPv6 (RFC 3775) Protocol configuration variable defaults
++ *
++ */
++#define DefHomeRtrAdvInterval		1000	/* seconds		*/
++#define DefMaxMobPfxAdvInterval		86400	/* seconds		*/
++#define DefMinDelayBetweenRAs		3	/* seconds (min 0.03)	*/
++#define DefMinMobPfxAdvInterval		600	/* seconds		*/
++#define DefInitialBindackTimeoutFirstReg	1.5 /* seconds		*/
++
++/* This is not actually specified in the draft, but is needed to avoid
++ * prefix solicitation storm when valid lifetime of a prefix is smaller
++ * than MAX_PFX_ADV_DELAY
++ */
++#define MIN_PFX_SOL_DELAY		5	/* seconds		*/
++
++/* Mobile IPv6 ICMP types		  */
++/*
++ * Official numbers from RFC 3775
++ */
++#define MIPV6_DHAAD_REQUEST		144
++#define MIPV6_DHAAD_REPLY		145
++#define MIPV6_PREFIX_SOLICIT		146
++#define MIPV6_PREFIX_ADV		147
++
++/* Binding update flag codes              */
++#define MIPV6_BU_F_ACK			0x80
++#define MIPV6_BU_F_HOME			0x40
++#define MIPV6_BU_F_LLADDR		0x20
++#define MIPV6_BU_F_KEYMGM		0x10
++
++/* Binding ackknowledgment flag codes */
++#define MIPV6_BA_F_KEYMGM		0x80
++
++/* Binding error status */
++#define MIPV6_BE_HAO_WO_BINDING		1
++#define MIPV6_BE_UNKNOWN_MH_TYPE	2
++
++/* Mobility Header */
++struct mipv6_mh
++{
++	__u8	payload;		/* Payload Protocol 		*/
++	__u8	length;			/* MH Length 			*/
++	__u8	type;			/* MH Type			*/
++	__u8	reserved;		/* Reserved			*/
++	__u16	checksum;		/* Checksum			*/
++	__u8	data[0];		/* Message specific data	*/
++} __attribute__ ((packed));
++
++/* Mobility Header type */
++#define IPPROTO_MOBILITY                135 /* RFC 3775*/                
++/* Mobility Header Message Types */
++
++#define MIPV6_MH_BRR			0
++#define MIPV6_MH_HOTI			1
++#define MIPV6_MH_COTI			2
++#define MIPV6_MH_HOT			3
++#define MIPV6_MH_COT			4
++#define MIPV6_MH_BU			5
++#define MIPV6_MH_BA			6
++#define MIPV6_MH_BE			7
++
++/*
++ * Status codes for Binding Acknowledgements
++ */
++#define SUCCESS				0
++#define REASON_UNSPECIFIED		128
++#define ADMINISTRATIVELY_PROHIBITED	129
++#define INSUFFICIENT_RESOURCES		130
++#define HOME_REGISTRATION_NOT_SUPPORTED	131
++#define NOT_HOME_SUBNET			132
++#define NOT_HA_FOR_MN			133
++#define DUPLICATE_ADDR_DETECT_FAIL	134
++#define SEQUENCE_NUMBER_OUT_OF_WINDOW	135
++#define EXPIRED_HOME_NONCE_INDEX	136
++#define EXPIRED_CAREOF_NONCE_INDEX	137
++#define EXPIRED_NONCES			138
++#define REG_TYPE_CHANGE_FORBIDDEN       139
++/*
++ * Values for mipv6_flags in struct inet6_skb_parm
++ */
++
++#define MIPV6_RCV_TUNNEL		0x1
++#define MIPV6_SND_HAO			0x2
++#define MIPV6_SND_BU                    0x4
++
++/*
++ * Mobility Header Message structures
++ */
++
++struct mipv6_mh_brr
++{
++	__u16		reserved;
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_bu
++{
++	__u16		sequence;	/* sequence number of BU	*/
++	__u8		flags;		/* flags			*/
++	__u8		reserved;	/* reserved bits		*/
++	__u16		lifetime;	/* lifetime of BU		*/
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_ba
++{
++	__u8		status;		/* statuscode			*/
++	__u8		reserved;	/* reserved bits		*/
++	__u16		sequence;	/* sequence number of BA	*/
++	__u16		lifetime;	/* lifetime in CN's bcache	*/
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_be
++{
++	__u8		status;
++	__u8		reserved;
++	struct in6_addr	home_addr;
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_addr_ti
++{
++	__u16		reserved;	/* Reserved			*/
++	u_int8_t	init_cookie[8]; /* HoT/CoT Init Cookie		*/
++	/* Mobility options */
++} __attribute__ ((packed));
++
++struct mipv6_mh_addr_test
++{
++	__u16		nonce_index;    /* Home/Care-of Nonce Index	*/
++	u_int8_t	init_cookie[8]; /* HoT/CoT Init Cookie		*/
++	u_int8_t	kgen_token[8];	/* Home/Care-of key generation token */
++	/* Mobility options */
++} __attribute__ ((packed));
++
++/*
++ * Mobility Options for various MH types.
++ */
++#define MIPV6_OPT_PAD1			0x00
++#define MIPV6_OPT_PADN			0x01
++#define MIPV6_OPT_BIND_REFRESH_ADVICE	0x02
++#define MIPV6_OPT_ALTERNATE_COA		0x03
++#define MIPV6_OPT_NONCE_INDICES		0x04
++#define MIPV6_OPT_AUTH_DATA		0x05
++
++#define MIPV6_SEQ_GT(x,y) \
++        ((short int)(((__u16)(x)) - ((__u16)(y))) > 0)
++
++/*
++ * Mobility Option structures
++ */
++
++struct mipv6_mo
++{
++	__u8		type;
++	__u8		length;
++	__u8		value[0];	/* type specific data */
++} __attribute__ ((packed));
++
++struct mipv6_mo_pad1
++{
++	__u8		type;
++} __attribute__ ((packed));
++
++struct mipv6_mo_padn
++{
++	__u8		type;
++	__u8		length;
++	__u8		data[0];
++} __attribute__ ((packed));
++
++struct mipv6_mo_alt_coa
++{
++	__u8		type;
++	__u8		length;
++	struct in6_addr	addr;		/* alternate care-of-address	*/
++} __attribute__ ((packed));
++
++struct mipv6_mo_nonce_indices
++{
++	__u8		type;
++	__u8		length;
++	__u16		home_nonce_i;	/* Home Nonce Index		*/
++	__u16		careof_nonce_i;	/* Careof Nonce Index		*/
++} __attribute__ ((packed)); 
++
++struct mipv6_mo_bauth_data
++{
++	__u8		type;
++	__u8		length;
++	__u8		data[0];
++} __attribute__ ((packed)); 
++
++struct mipv6_mo_br_advice
++{
++	__u8		type;
++	__u8		length;
++	__u16		refresh_interval; /* Refresh Interval		*/
++} __attribute__ ((packed));
++
++/*
++ * Home Address Destination Option structure
++ */
++struct mipv6_dstopt_homeaddr
++{
++	__u8		type;		/* type-code for option 	*/
++	__u8		length;		/* option length 		*/
++	struct in6_addr	addr;		/* home address 		*/
++} __attribute__ ((packed));
++
++#endif /* _NET_MIPV6_H */
+--- linux-2.4.27/include/net/ndisc.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/net/ndisc.h
+@@ -21,6 +21,10 @@
+ #define ND_OPT_REDIRECT_HDR		4
+ #define ND_OPT_MTU			5
+ 
++/* Mobile IPv6 specific ndisc options */ 
++#define ND_OPT_RTR_ADV_INTERVAL		7 
++#define ND_OPT_HOME_AGENT_INFO		8  
++
+ #define MAX_RTR_SOLICITATION_DELAY	HZ
+ 
+ #define ND_REACHABLE_TIME		(30*HZ)
+@@ -57,7 +61,7 @@
+ } __attribute__((__packed__));
+ 
+ struct ndisc_options {
+-	struct nd_opt_hdr *nd_opt_array[7];
++	struct nd_opt_hdr *nd_opt_array[10];
+ 	struct nd_opt_hdr *nd_opt_piend;
+ };
+ 
+@@ -67,6 +71,8 @@
+ #define nd_opts_pi_end		nd_opt_piend
+ #define nd_opts_rh		nd_opt_array[ND_OPT_REDIRECT_HDR]
+ #define nd_opts_mtu		nd_opt_array[ND_OPT_MTU]
++#define nd_opts_rai		nd_opt_array[ND_OPT_RTR_ADV_INTERVAL]
++#define nd_opts_hai		nd_opt_array[ND_OPT_HOME_AGENT_INFO]
+ 
+ extern struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end);
+ extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts);
+@@ -83,6 +89,15 @@
+ 					      struct in6_addr *daddr,
+ 					      struct in6_addr *saddr);
+ 
++extern void			ndisc_send_na(struct net_device *dev,
++					      struct neighbour *neigh,
++					      struct in6_addr *daddr,
++					      struct in6_addr *solicited_addr,
++					      int router,
++					      int solicited,
++					      int override,
++					      int inc_opt);
++
+ extern void			ndisc_send_rs(struct net_device *dev,
+ 					      struct in6_addr *saddr,
+ 					      struct in6_addr *daddr);
+--- linux-2.4.27/include/net/sock.h~mipv6-1.1-v2.4.26
++++ linux-2.4.27/include/net/sock.h
+@@ -149,7 +149,9 @@
+ 	struct in6_addr 	rcv_saddr;
+ 	struct in6_addr		daddr;
+ 	struct in6_addr		*daddr_cache;
+-
++#if defined(CONFIG_IPV6_SUBTREES)
++	struct in6_addr		*saddr_cache;
++#endif
+ 	__u32			flow_label;
+ 	__u32			frag_size;
+ 	int			hop_limit;
+--- linux-2.4.27/net/Makefile~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/Makefile
+@@ -7,7 +7,7 @@
+ 
+ O_TARGET :=	network.o
+ 
+-mod-subdirs :=	ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp 802
++mod-subdirs :=	ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp 802 ipv6
+ export-objs :=	netsyms.o
+ 
+ subdir-y :=	core ethernet
+@@ -25,6 +25,7 @@
+ ifneq ($(CONFIG_IPV6),n)
+ ifneq ($(CONFIG_IPV6),)
+ subdir-$(CONFIG_NETFILTER)	+= ipv6/netfilter
++subdir-$(CONFIG_IPV6_MOBILITY)	+= ipv6/mobile_ip6
+ endif
+ endif
+ 
+--- linux-2.4.27/net/core/neighbour.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/core/neighbour.c
+@@ -386,7 +386,7 @@
+ 	if (!creat)
+ 		return NULL;
+ 
+-	n = kmalloc(sizeof(*n) + key_len, GFP_KERNEL);
++	n = kmalloc(sizeof(*n) + key_len, GFP_ATOMIC);
+ 	if (n == NULL)
+ 		return NULL;
+ 
+--- linux-2.4.27/net/ipv6/Config.in~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/Config.in
+@@ -1,10 +1,16 @@
+ #
+ # IPv6 configuration
+ # 
+-
++bool '    IPv6: routing by source address (EXPERIMENTAL)' CONFIG_IPV6_SUBTREES
+ #bool '    IPv6: flow policy support' CONFIG_RT6_POLICY
+ #bool '    IPv6: firewall support' CONFIG_IPV6_FIREWALL
+ 
++if [ "$CONFIG_IPV6" != "n" ]; then
++	dep_tristate '    IPv6: IPv6 over IPv6 Tunneling (EXPERIMENTAL)' CONFIG_IPV6_TUNNEL $CONFIG_IPV6
++fi
++
++source net/ipv6/mobile_ip6/Config.in
++
+ if [ "$CONFIG_NETFILTER" != "n" ]; then
+    source net/ipv6/netfilter/Config.in
+ fi
+--- linux-2.4.27/net/ipv6/Makefile~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/Makefile
+@@ -6,18 +6,28 @@
+ # unless it's something special (ie not a .c file).
+ #
+ 
++export-objs := ipv6_syms.o ipv6_tunnel.o
+ 
+-O_TARGET := ipv6.o
++#list-multi 	:= ipv6.o ipv6_tunnel.o
+ 
+-obj-y :=	af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o sit.o \
+-		route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o raw.o \
+-		protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
+-		exthdrs.o sysctl_net_ipv6.o datagram.o proc.o \
+-		ip6_flowlabel.o ipv6_syms.o
++ipv6-objs	:= af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
++		   sit.o route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o \
++		   raw.o protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
++		   exthdrs.o sysctl_net_ipv6.o datagram.o proc.o \
++		   ip6_flowlabel.o ipv6_syms.o
+ 
+-export-objs := ipv6_syms.o
++ifneq ($(CONFIG_IPV6_MOBILITY),n)
++ifneq ($(CONFIG_IPV6_MOBILITY),)
++ipv6-objs += mipglue.o
++endif
++endif
++
++obj-$(CONFIG_IPV6)  += ipv6.o
++obj-$(CONFIG_IPV6_TUNNEL)  += ipv6_tunnel.o
++
++ipv6.o: $(ipv6-objs)
++	$(LD) -r -o $@ $(ipv6-objs)
+ 
+-obj-m  := $(O_TARGET)
+ 
+ #obj-$(CONFIG_IPV6_FIREWALL) += ip6_fw.o
+ 
+--- linux-2.4.27/net/ipv6/addrconf.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/addrconf.c
+@@ -68,6 +68,8 @@
+ 
+ #include <asm/uaccess.h>
+ 
++#include <net/mipglue.h>
++
+ #define IPV6_MAX_ADDRESSES 16
+ 
+ /* Set to 3 to get tracing... */
+@@ -103,9 +105,9 @@
+ 
+ static int addrconf_ifdown(struct net_device *dev, int how);
+ 
+-static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
++void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
+ static void addrconf_dad_timer(unsigned long data);
+-static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
++void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+ static void addrconf_rs_timer(unsigned long data);
+ static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
+ 
+@@ -330,38 +332,6 @@
+ 	return idev;
+ }
+ 
+-void ipv6_addr_prefix(struct in6_addr *prefix,
+-	struct in6_addr *addr, int prefix_len)
+-{
+-	unsigned long mask;
+-	int ncopy, nbits;
+-
+-	memset(prefix, 0, sizeof(*prefix));
+-
+-	if (prefix_len <= 0)
+-		return;
+-	if (prefix_len > 128)
+-		prefix_len = 128;
+-
+-	ncopy = prefix_len / 32;
+-	switch (ncopy) {
+-	case 4:	prefix->s6_addr32[3] = addr->s6_addr32[3];
+-	case 3:	prefix->s6_addr32[2] = addr->s6_addr32[2];
+-	case 2:	prefix->s6_addr32[1] = addr->s6_addr32[1];
+-	case 1:	prefix->s6_addr32[0] = addr->s6_addr32[0];
+-	case 0:	break;
+-	}
+-	nbits = prefix_len % 32;
+-	if (nbits == 0)
+-		return;
+-
+-	mask = ~((1 << (32 - nbits)) - 1);
+-	mask = htonl(mask);
+-
+-	prefix->s6_addr32[ncopy] = addr->s6_addr32[ncopy] & mask;
+-}
+-
+-
+ static void dev_forward_change(struct inet6_dev *idev)
+ {
+ 	struct net_device *dev;
+@@ -513,7 +483,7 @@
+ 
+ /* This function wants to get referenced ifp and releases it before return */
+ 
+-static void ipv6_del_addr(struct inet6_ifaddr *ifp)
++void ipv6_del_addr(struct inet6_ifaddr *ifp)
+ {
+ 	struct inet6_ifaddr *ifa, **ifap;
+ 	struct inet6_dev *idev = ifp->idev;
+@@ -662,6 +632,12 @@
+ 	if (match)
+ 		in6_ifa_put(match);
+ 
++	/* The home address is always used as source address in
++	 * MIPL mobile IPv6
++	 */
++	if (scope != IFA_HOST && scope != IFA_LINK)
++		addrconf_get_mipv6_home_address(saddr);
++
+ 	return err;
+ }
+ 
+@@ -815,7 +791,7 @@
+ }
+ 
+ 
+-static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
++int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
+ {
+ 	switch (dev->type) {
+ 	case ARPHRD_ETHER:
+@@ -840,7 +816,7 @@
+ 	return -1;
+ }
+ 
+-static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
++int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
+ {
+ 	int err = -1;
+ 	struct inet6_ifaddr *ifp;
+@@ -1407,6 +1383,24 @@
+ 		sit_route_add(dev);
+ }
+ 
++/**
++ * addrconf_ipv6_tunnel_config - configure IPv6 tunnel device
++ * @dev: tunnel device
++ **/
++
++static void addrconf_ipv6_tunnel_config(struct net_device *dev)
++{
++	struct inet6_dev *idev;
++
++	ASSERT_RTNL();
++
++	/* Assign inet6_dev structure to tunnel device */
++	if ((idev = ipv6_find_idev(dev)) == NULL) {
++		printk(KERN_DEBUG "init ipv6 tunnel: add_dev failed\n");
++		return;
++	}
++}
++
+ 
+ int addrconf_notify(struct notifier_block *this, unsigned long event, 
+ 		    void * data)
+@@ -1421,6 +1415,10 @@
+ 			addrconf_sit_config(dev);
+ 			break;
+ 
++		case ARPHRD_TUNNEL6:
++			addrconf_ipv6_tunnel_config(dev);
++			break;
++
+ 		case ARPHRD_LOOPBACK:
+ 			init_loopback(dev);
+ 			break;
+@@ -1602,7 +1600,7 @@
+ /*
+  *	Duplicate Address Detection
+  */
+-static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
++void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
+ {
+ 	struct net_device *dev;
+ 	unsigned long rand_num;
+@@ -1667,7 +1665,7 @@
+ 	in6_ifa_put(ifp);
+ }
+ 
+-static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
++void addrconf_dad_completed(struct inet6_ifaddr *ifp)
+ {
+ 	struct net_device *	dev = ifp->idev->dev;
+ 
+@@ -1676,7 +1674,7 @@
+ 	 */
+ 
+ 	ipv6_ifa_notify(RTM_NEWADDR, ifp);
+-
++	notifier_call_chain(&inet6addr_chain,NETDEV_UP,ifp);
+ 	/* If added prefix is link local and forwarding is off,
+ 	   start sending router solicitations.
+ 	 */
+@@ -1877,8 +1875,20 @@
+ 	if (rta[IFA_LOCAL-1]) {
+ 		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+ 			return -EINVAL;
++		if (ifm->ifa_flags & IFA_F_HOMEADDR && !rta[IFA_HOMEAGENT-1])
++			return -EINVAL;
+ 		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
+ 	}
++	if (rta[IFA_HOMEAGENT-1]) {
++		struct in6_addr *ha;
++		if (pfx == NULL || !(ifm->ifa_flags & IFA_F_HOMEADDR))
++			return -EINVAL;
++		if (RTA_PAYLOAD(rta[IFA_HOMEAGENT-1]) < sizeof(*ha))
++			return -EINVAL;
++		ha = RTA_DATA(rta[IFA_HOMEAGENT-1]);
++		addrconf_set_mipv6_mn_home(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
++					   ha, ifm->ifa_prefixlen);
++	}
+ 	if (pfx == NULL)
+ 		return -EINVAL;
+ 
+--- linux-2.4.27/net/ipv6/af_inet6.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/af_inet6.c
+@@ -58,6 +58,9 @@
+ #include <net/transp_v6.h>
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
++#ifdef CONFIG_IPV6_TUNNEL
++#include <net/ipv6_tunnel.h>
++#endif
+ 
+ #include <asm/uaccess.h>
+ #include <asm/system.h>
+@@ -646,6 +649,11 @@
+ 	err = ndisc_init(&inet6_family_ops);
+ 	if (err)
+ 		goto ndisc_fail;
++#ifdef CONFIG_IPV6_TUNNEL
++	err = ip6_tunnel_init();
++	if (err)
++		goto ip6_tunnel_fail;
++#endif
+ 	err = igmp6_init(&inet6_family_ops);
+ 	if (err)
+ 		goto igmp_fail;
+@@ -698,6 +706,10 @@
+ #endif
+ igmp_fail:
+ 	ndisc_cleanup();
++#ifdef CONFIG_IPV6_TUNNEL
++	ip6_tunnel_cleanup();
++ip6_tunnel_fail:
++#endif
+ ndisc_fail:
+ 	icmpv6_cleanup();
+ icmp_fail:
+@@ -730,6 +742,9 @@
+ 	ip6_route_cleanup();
+ 	ipv6_packet_cleanup();
+ 	igmp6_cleanup();
++#ifdef CONFIG_IPV6_TUNNEL
++	ip6_tunnel_cleanup();
++#endif
+ 	ndisc_cleanup();
+ 	icmpv6_cleanup();
+ #ifdef CONFIG_SYSCTL
+--- linux-2.4.27/net/ipv6/exthdrs.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/exthdrs.c
+@@ -41,6 +41,9 @@
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
+ 
++#include <net/mipglue.h>
++#include <net/mipv6.h>
++
+ #include <asm/uaccess.h>
+ 
+ /*
+@@ -160,7 +163,8 @@
+  *****************************/
+ 
+ struct tlvtype_proc tlvprocdestopt_lst[] = {
+-	/* No destination options are defined now */
++	/* Mobility Support destination options */
++	{MIPV6_TLV_HOMEADDR,    mipv6_handle_dstopt},
+ 	{-1,			NULL}
+ };
+ 
+@@ -210,6 +214,7 @@
+ 
+ 	struct ipv6_rt_hdr *hdr;
+ 	struct rt0_hdr *rthdr;
++	struct rt2_hdr *rt2hdr;
+ 
+ 	if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
+ 	    !pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
+@@ -225,17 +230,25 @@
+ 		kfree_skb(skb);
+ 		return -1;
+ 	}
+-
++	/* Silently discard invalid packets containing RTH type 2 */ 
++	if (hdr->type == IPV6_SRCRT_TYPE_2 && 
++	    (hdr->hdrlen != 2 || hdr->segments_left != 1)) {
++		kfree_skb(skb);
++		return -1;
++	}
+ looped_back:
+ 	if (hdr->segments_left == 0) {
+-		opt->srcrt = skb->h.raw - skb->nh.raw;
++		if (hdr->type == IPV6_SRCRT_TYPE_0)
++			opt->srcrt = skb->h.raw - skb->nh.raw;
++		else if (hdr->type == IPV6_SRCRT_TYPE_2)
++			opt->srcrt2 = skb->h.raw - skb->nh.raw;
+ 		skb->h.raw += (hdr->hdrlen + 1) << 3;
+ 		opt->dst0 = opt->dst1;
+ 		opt->dst1 = 0;
+ 		return (&hdr->nexthdr) - skb->nh.raw;
+ 	}
+ 
+-	if (hdr->type != IPV6_SRCRT_TYPE_0) {
++	if (hdr->type != IPV6_SRCRT_TYPE_0 && hdr->type != IPV6_SRCRT_TYPE_2) {
+ 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) - skb->nh.raw);
+ 		return -1;
+ 	}
+@@ -275,9 +288,20 @@
+ 
+ 	i = n - --hdr->segments_left;
+ 
+-	rthdr = (struct rt0_hdr *) hdr;
+-	addr = rthdr->addr;
+-	addr += i - 1;
++	if (hdr->type == IPV6_SRCRT_TYPE_0) {
++		rthdr = (struct rt0_hdr *) hdr;
++		addr = rthdr->addr;
++		addr += i - 1;
++	} else {
++		/* check that address is this node's home address */
++		rt2hdr = (struct rt2_hdr *) hdr;
++		addr = &rt2hdr->addr;
++		if (!ipv6_chk_addr(addr, NULL) || 
++		    !ipv6_chk_mip_home_addr(addr)) {
++			kfree_skb(skb);
++			return -1;
++		}
++	}
+ 
+ 	addr_type = ipv6_addr_type(addr);
+ 
+@@ -330,6 +354,10 @@
+    temporary (or permanent) backdoor.
+    If listening socket set IPV6_RTHDR to 2, then we invert header.
+                                                    --ANK (980729)
++
++   By the Mobile IPv6 specification Type 2 routing header MUST NOT be
++   inverted.
++                                                   --AJT (20020917)
+  */
+ 
+ struct ipv6_txoptions *
+@@ -352,6 +380,18 @@
+ 	struct ipv6_txoptions *opt;
+ 	int hdrlen = ipv6_optlen(hdr);
+ 
++	if (hdr->type == IPV6_SRCRT_TYPE_2) {
++		opt = sock_kmalloc(sk, sizeof(*opt) + hdrlen, GFP_ATOMIC);
++		if (opt == NULL)
++			return NULL;
++		memset(opt, 0, sizeof(*opt));
++		opt->tot_len = sizeof(*opt) + hdrlen;
++		opt->srcrt = (void*)(opt+1);
++		opt->opt_nflen = hdrlen;
++		memcpy(opt->srcrt, hdr, sizeof(struct rt2_hdr));
++		return opt;
++	}
++
+ 	if (hdr->segments_left ||
+ 	    hdr->type != IPV6_SRCRT_TYPE_0 ||
+ 	    hdr->hdrlen & 0x01)
+@@ -622,8 +662,18 @@
+ 	if (opt) {
+ 		if (opt->dst0opt)
+ 			prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_DEST, opt->dst0opt);
+-		if (opt->srcrt)
+-			prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, daddr);
++		if (opt->srcrt) {
++			if (opt->srcrt2) {
++				struct in6_addr *rt2_hop = &((struct rt2_hdr *)opt->srcrt2)->addr;
++				prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, rt2_hop);
++			} else
++				prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, daddr);
++		}
++		if (opt->srcrt2) {
++			struct inet6_skb_parm *parm = (struct inet6_skb_parm *)skb->cb;
++			ipv6_addr_copy(&parm->hoa, daddr);
++			prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt2, daddr);
++		}
+ 	}
+ 	return prev_hdr;
+ }
+@@ -684,6 +734,11 @@
+ 			  u8 *proto,
+ 			  struct in6_addr **daddr)
+ {
++	if (opt->srcrt2) {
++		struct inet6_skb_parm *parm = (struct inet6_skb_parm *)skb->cb;
++		ipv6_addr_copy(&parm->hoa, *daddr);
++		ipv6_push_rthdr(skb, proto, opt->srcrt2, daddr);
++	}
+ 	if (opt->srcrt)
+ 		ipv6_push_rthdr(skb, proto, opt->srcrt, daddr);
+ 	if (opt->dst0opt)
+@@ -719,6 +774,8 @@
+ 			*((char**)&opt2->auth) += dif;
+ 		if (opt2->srcrt)
+ 			*((char**)&opt2->srcrt) += dif;
++		if (opt2->srcrt2)
++			*((char**)&opt2->srcrt2) += dif;
+ 	}
+ 	return opt2;
+ }
+--- linux-2.4.27/net/ipv6/icmp.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/icmp.c
+@@ -61,6 +61,8 @@
+ #include <net/addrconf.h>
+ #include <net/icmp.h>
+ 
++#include <net/mipglue.h>
++
+ #include <asm/uaccess.h>
+ #include <asm/system.h>
+ 
+@@ -364,6 +366,8 @@
+ 
+ 	msg.len = len;
+ 
++	icmpv6_swap_mipv6_addrs(skb);
++
+ 	ip6_build_xmit(sk, icmpv6_getfrag, &msg, &fl, len, NULL, -1,
+ 		       MSG_DONTWAIT);
+ 	if (type >= ICMPV6_DEST_UNREACH && type <= ICMPV6_PARAMPROB)
+@@ -562,13 +566,13 @@
+ 		rt6_pmtu_discovery(&orig_hdr->daddr, &orig_hdr->saddr, dev,
+ 				   ntohl(hdr->icmp6_mtu));
+ 
+-		/*
+-		 *	Drop through to notify
+-		 */
++		icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
++		break;
+ 
+ 	case ICMPV6_DEST_UNREACH:
+-	case ICMPV6_TIME_EXCEED:
+ 	case ICMPV6_PARAMPROB:
++		mipv6_icmp_rcv(skb);
++	case ICMPV6_TIME_EXCEED:
+ 		icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
+ 		break;
+ 
+@@ -598,6 +602,13 @@
+ 	case ICMPV6_MLD2_REPORT:
+ 		break;
+ 
++	case MIPV6_DHAAD_REQUEST:
++	case MIPV6_DHAAD_REPLY:
++	case MIPV6_PREFIX_SOLICIT:
++	case MIPV6_PREFIX_ADV:
++		mipv6_icmp_rcv(skb);
++		break;
++
+ 	default:
+ 		if (net_ratelimit())
+ 			printk(KERN_DEBUG "icmpv6: msg of unkown type\n");
+--- linux-2.4.27/net/ipv6/ip6_fib.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/ip6_fib.c
+@@ -18,6 +18,7 @@
+  * 	Yuji SEKIYA @USAGI:	Support default route on router node;
+  * 				remove ip6_null_entry from the top of
+  * 				routing table.
++ * 	Ville Nuorvala:		Fixes to source address based routing
+  */
+ #include <linux/config.h>
+ #include <linux/errno.h>
+@@ -40,7 +41,6 @@
+ #include <net/ip6_route.h>
+ 
+ #define RT6_DEBUG 2
+-#undef CONFIG_IPV6_SUBTREES
+ 
+ #if RT6_DEBUG >= 3
+ #define RT6_TRACE(x...) printk(KERN_DEBUG x)
+@@ -500,6 +500,8 @@
+ 		mod_timer(&ip6_fib_timer, jiffies + ip6_rt_gc_interval);
+ }
+ 
++static struct rt6_info * fib6_find_prefix(struct fib6_node *fn);
++
+ /*
+  *	Add routing information to the routing tree.
+  *	<destination addr>/<source addr>
+@@ -508,17 +510,19 @@
+ 
+ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nlmsghdr *nlh)
+ {
+-	struct fib6_node *fn;
++	struct fib6_node *fn = root;
+ 	int err = -ENOMEM;
+ 
+-	fn = fib6_add_1(root, &rt->rt6i_dst.addr, sizeof(struct in6_addr),
+-			rt->rt6i_dst.plen, (u8*) &rt->rt6i_dst - (u8*) rt);
++#ifdef CONFIG_IPV6_SUBTREES
++	struct fib6_node *pn = NULL;
+ 
++	fn = fib6_add_1(root, &rt->rt6i_src.addr, sizeof(struct in6_addr),
++			rt->rt6i_src.plen, (u8*) &rt->rt6i_src - (u8*) rt);
++	
+ 	if (fn == NULL)
+ 		goto out;
+ 
+-#ifdef CONFIG_IPV6_SUBTREES
+-	if (rt->rt6i_src.plen) {
++	if (rt->rt6i_dst.plen) {
+ 		struct fib6_node *sn;
+ 
+ 		if (fn->subtree == NULL) {
+@@ -546,9 +550,9 @@
+ 
+ 			/* Now add the first leaf node to new subtree */
+ 
+-			sn = fib6_add_1(sfn, &rt->rt6i_src.addr,
+-					sizeof(struct in6_addr), rt->rt6i_src.plen,
+-					(u8*) &rt->rt6i_src - (u8*) rt);
++			sn = fib6_add_1(sfn, &rt->rt6i_dst.addr,
++					sizeof(struct in6_addr), rt->rt6i_dst.plen,
++					(u8*) &rt->rt6i_dst - (u8*) rt);
+ 
+ 			if (sn == NULL) {
+ 				/* If it is failed, discard just allocated
+@@ -562,21 +566,30 @@
+ 			/* Now link new subtree to main tree */
+ 			sfn->parent = fn;
+ 			fn->subtree = sfn;
+-			if (fn->leaf == NULL) {
+-				fn->leaf = rt;
+-				atomic_inc(&rt->rt6i_ref);
+-			}
+ 		} else {
+-			sn = fib6_add_1(fn->subtree, &rt->rt6i_src.addr,
+-					sizeof(struct in6_addr), rt->rt6i_src.plen,
+-					(u8*) &rt->rt6i_src - (u8*) rt);
++			sn = fib6_add_1(fn->subtree, &rt->rt6i_dst.addr,
++					sizeof(struct in6_addr), rt->rt6i_dst.plen,
++					(u8*) &rt->rt6i_dst - (u8*) rt);
+ 
+ 			if (sn == NULL)
+ 				goto st_failure;
+ 		}
+ 
++		/* fib6_add_1 might have cleared the old leaf pointer */
++		if (fn->leaf == NULL) {
++			fn->leaf = rt;
++			atomic_inc(&rt->rt6i_ref);
++		}
++
++		pn = fn;
+ 		fn = sn;
+ 	}
++#else 
++	fn = fib6_add_1(root, &rt->rt6i_dst.addr, sizeof(struct in6_addr),
++			rt->rt6i_dst.plen, (u8*) &rt->rt6i_dst - (u8*) rt);
++
++	if (fn == NULL)
++		goto out;
+ #endif
+ 
+ 	err = fib6_add_rt2node(fn, rt, nlh);
+@@ -588,8 +601,30 @@
+ 	}
+ 
+ out:
+-	if (err)
++	if (err) {
++#ifdef CONFIG_IPV6_SUBTREES
++
++		/* If fib6_add_1 has cleared the old leaf pointer in the 
++		   super-tree leaf node, we have to find a new one for it. 
++		   
++		   This situation will never arise in the sub-tree since 
++		   the node will at least have the route that caused 
++		   fib6_add_rt2node to fail.
++		*/
++
++		if (pn && !(pn->fn_flags & RTN_RTINFO)) {
++			pn->leaf = fib6_find_prefix(pn);
++#if RT6_DEBUG >= 2
++			if (!pn->leaf) {
++				BUG_TRAP(pn->leaf);
++				pn->leaf = &ip6_null_entry;
++			}
++#endif
++			atomic_inc(&pn->leaf->rt6i_ref);
++		}
++#endif
+ 		dst_free(&rt->u.dst);
++	}
+ 	return err;
+ 
+ #ifdef CONFIG_IPV6_SUBTREES
+@@ -597,8 +632,8 @@
+ 	   is orphan. If it is, shoot it.
+ 	 */
+ st_failure:
+-	if (fn && !(fn->fn_flags&RTN_RTINFO|RTN_ROOT))
+-		fib_repair_tree(fn);
++	if (fn && !(fn->fn_flags & (RTN_RTINFO | RTN_ROOT)))
++		fib6_repair_tree(fn);
+ 	dst_free(&rt->u.dst);
+ 	return err;
+ #endif
+@@ -641,22 +676,28 @@
+ 		break;
+ 	}
+ 
+-	while ((fn->fn_flags & RTN_ROOT) == 0) {
++	for (;;) {
+ #ifdef CONFIG_IPV6_SUBTREES
+ 		if (fn->subtree) {
+-			struct fib6_node *st;
+-			struct lookup_args *narg;
+-
+-			narg = args + 1;
+-
+-			if (narg->addr) {
+-				st = fib6_lookup_1(fn->subtree, narg);
++			struct rt6key *key;
+ 
+-				if (st && !(st->fn_flags & RTN_ROOT))
+-					return st;
++			key = (struct rt6key *) ((u8 *) fn->leaf +
++						 args->offset);
++			
++			if (addr_match(&key->addr, args->addr, key->plen)) {
++				struct fib6_node *st;
++				struct lookup_args *narg = args + 1;
++				if (!ipv6_addr_any(narg->addr)) {
++					st = fib6_lookup_1(fn->subtree, narg);
++					
++					if (st && !(st->fn_flags & RTN_ROOT))
++						return st;
++				} 
+ 			}
+ 		}
+ #endif
++		if (fn->fn_flags & RTN_ROOT)
++			break;
+ 
+ 		if (fn->fn_flags & RTN_RTINFO) {
+ 			struct rt6key *key;
+@@ -680,13 +721,22 @@
+ 	struct lookup_args args[2];
+ 	struct rt6_info *rt = NULL;
+ 	struct fib6_node *fn;
++#ifdef CONFIG_IPV6_SUBTREES
++	struct in6_addr saddr_buf;
++#endif
+ 
++#ifdef CONFIG_IPV6_SUBTREES
++	if (saddr == NULL) {
++		memset(&saddr_buf, 0, sizeof(struct in6_addr));
++		saddr = &saddr_buf;
++	}
++	args[0].offset = (u8*) &rt->rt6i_src - (u8*) rt;
++	args[0].addr = saddr;
++	args[1].offset = (u8*) &rt->rt6i_dst - (u8*) rt;
++	args[1].addr = daddr;
++#else 
+ 	args[0].offset = (u8*) &rt->rt6i_dst - (u8*) rt;
+ 	args[0].addr = daddr;
+-
+-#ifdef CONFIG_IPV6_SUBTREES
+-	args[1].offset = (u8*) &rt->rt6i_src - (u8*) rt;
+-	args[1].addr = saddr;
+ #endif
+ 
+ 	fn = fib6_lookup_1(root, args);
+@@ -739,19 +789,25 @@
+ {
+ 	struct rt6_info *rt = NULL;
+ 	struct fib6_node *fn;
+-
+-	fn = fib6_locate_1(root, daddr, dst_len,
+-			   (u8*) &rt->rt6i_dst - (u8*) rt);
+-
+ #ifdef CONFIG_IPV6_SUBTREES
+-	if (src_len) {
+-		BUG_TRAP(saddr!=NULL);
+-		if (fn == NULL)
+-			fn = fn->subtree;
++	struct in6_addr saddr_buf;
++
++	if (saddr == NULL) {
++		memset(&saddr_buf, 0, sizeof(struct in6_addr));
++		saddr = &saddr_buf;
++	}
++	fn = fib6_locate_1(root, saddr, src_len, 
++			   (u8*) &rt->rt6i_src - (u8*) rt);
++	if (dst_len) {
+ 		if (fn)
+-			fn = fib6_locate_1(fn, saddr, src_len,
+-					   (u8*) &rt->rt6i_src - (u8*) rt);
++			fn = fib6_locate_1(fn->subtree, daddr, dst_len,
++					   (u8*) &rt->rt6i_dst - (u8*) rt);
++		else 
++			return NULL;
+ 	}
++#else
++	fn = fib6_locate_1(root, daddr, dst_len,
++			   (u8*) &rt->rt6i_dst - (u8*) rt);
+ #endif
+ 
+ 	if (fn && fn->fn_flags&RTN_RTINFO)
+@@ -939,7 +995,7 @@
+ 			}
+ 			fn = fn->parent;
+ 		}
+-		/* No more references are possiible at this point. */
++		/* No more references are possible at this point. */
+ 		if (atomic_read(&rt->rt6i_ref) != 1) BUG();
+ 	}
+ 
+--- linux-2.4.27/net/ipv6/ip6_input.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/ip6_input.c
+@@ -40,13 +40,42 @@
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
+ 
++static inline int ip6_proxy_chk(struct sk_buff *skb)
++{
++	struct ipv6hdr *hdr = skb->nh.ipv6h;
++
++	if (ipv6_addr_type(&hdr->daddr)&IPV6_ADDR_UNICAST &&
++	    pneigh_lookup(&nd_tbl, &hdr->daddr, skb->dev, 0)) {
++		u8 nexthdr = hdr->nexthdr;
++		int offset;
++		struct icmp6hdr msg;
+ 
++		if (ipv6_ext_hdr(nexthdr)) {
++			offset = ipv6_skip_exthdr(skb, sizeof(*hdr), &nexthdr, 
++						  skb->len - sizeof(*hdr));
++			if (offset < 0)
++				return 0;
++		} else
++			offset = sizeof(*hdr);
++
++		/* capture unicast NUD probes on behalf of the proxied node */
+ 
++		if (nexthdr == IPPROTO_ICMPV6 &&
++		    !skb_copy_bits(skb, offset, &msg, sizeof(msg)) &&
++		    msg.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) {
++			return 1;
++		}
++	}
++	return 0;
++}
++ 
+ static inline int ip6_rcv_finish( struct sk_buff *skb) 
+ {
+-	if (skb->dst == NULL)
+-		ip6_route_input(skb);
+-
++	if (skb->dst == NULL) {
++		if (ip6_proxy_chk(skb)) 
++			return ip6_input(skb);
++ 		ip6_route_input(skb);
++	}
+ 	return skb->dst->input(skb);
+ }
+ 
+--- linux-2.4.27/net/ipv6/ip6_output.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/ip6_output.c
+@@ -50,6 +50,8 @@
+ #include <net/rawv6.h>
+ #include <net/icmp.h>
+ 
++#include <net/mipglue.h>
++
+ static __inline__ void ipv6_select_ident(struct sk_buff *skb, struct frag_hdr *fhdr)
+ {
+ 	static u32 ipv6_fragmentation_id = 1;
+@@ -194,7 +196,14 @@
+ 	u8  proto = fl->proto;
+ 	int seg_len = skb->len;
+ 	int hlimit;
++	int retval;
++	struct ipv6_txoptions *orig_opt = opt;
++
++	opt = ip6_add_mipv6_txoptions(sk, skb, orig_opt, fl, &dst);
+ 
++	if(orig_opt && !opt)
++		return -ENOMEM;
++		
+ 	if (opt) {
+ 		int head_room;
+ 
+@@ -209,8 +218,11 @@
+ 			struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
+ 			kfree_skb(skb);
+ 			skb = skb2;
+-			if (skb == NULL)
++			if (skb == NULL) {
++				ip6_free_mipv6_txoptions(opt, orig_opt);
++
+ 				return -ENOBUFS;
++			}
+ 			if (sk)
+ 				skb_set_owner_w(skb, sk);
+ 		}
+@@ -242,7 +254,10 @@
+ 
+ 	if (skb->len <= dst->pmtu) {
+ 		IP6_INC_STATS(Ip6OutRequests);
+-		return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
++		ip6_mark_mipv6_packet(opt, skb);
++		retval = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
++		ip6_free_mipv6_txoptions(opt, orig_opt);
++		return retval; 
+ 	}
+ 
+ 	if (net_ratelimit())
+@@ -250,6 +265,9 @@
+ 	skb->dev = dst->dev;
+ 	icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, dst->pmtu, skb->dev);
+ 	kfree_skb(skb);
++
++	ip6_free_mipv6_txoptions(opt, orig_opt);
++
+ 	return -EMSGSIZE;
+ }
+ 
+@@ -473,6 +491,7 @@
+ 
+ 			IP6_INC_STATS(Ip6FragCreates);
+ 			IP6_INC_STATS(Ip6OutRequests);
++			ip6_mark_mipv6_packet(opt, skb);
+ 			err = NF_HOOK(PF_INET6,NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
+ 			if (err) {
+ 				kfree_skb(last_skb);
+@@ -499,6 +518,7 @@
+ 	IP6_INC_STATS(Ip6FragCreates);
+ 	IP6_INC_STATS(Ip6FragOKs);
+ 	IP6_INC_STATS(Ip6OutRequests);
++	ip6_mark_mipv6_packet(opt, last_skb);
+ 	return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, last_skb, NULL,dst->dev, ip6_maybe_reroute);
+ }
+ 
+@@ -509,26 +529,43 @@
+ 	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
+ 	struct in6_addr *final_dst = NULL;
+ 	struct dst_entry *dst;
++	struct rt6_info *rt;
+ 	int err = 0;
+ 	unsigned int pktlength, jumbolen, mtu;
+ 	struct in6_addr saddr;
++	struct ipv6_txoptions *orig_opt = opt; 
++#ifdef CONFIG_IPV6_SUBTREES
++	struct dst_entry *org_dst;
++#endif
++
++	opt = ip6_add_mipv6_txoptions(sk, NULL, orig_opt, fl, NULL);
++
++	if(orig_opt && !opt)
++		return -ENOMEM;
+ 
+ 	if (opt && opt->srcrt) {
+ 		struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
+ 		final_dst = fl->fl6_dst;
+ 		fl->fl6_dst = rt0->addr;
+-	}
++	} else if (opt && opt->srcrt2) {
++                struct rt2_hdr *rt2 = (struct rt2_hdr *) opt->srcrt2;
++                final_dst = fl->fl6_dst;
++                fl->fl6_dst = &rt2->addr;
++        }
+ 
+ 	if (!fl->oif && ipv6_addr_is_multicast(fl->nl_u.ip6_u.daddr))
+ 		fl->oif = np->mcast_oif;
+ 
+ 	dst = __sk_dst_check(sk, np->dst_cookie);
++#ifdef CONFIG_IPV6_SUBTREES
++	org_dst = dst;
++#endif
+ 	if (dst) {
+-		struct rt6_info *rt = (struct rt6_info*)dst;
++		rt = (struct rt6_info*)dst;
+ 
+ 			/* Yes, checking route validity in not connected
+ 			   case is not very simple. Take into account,
+-			   that we do not support routing by source, TOS,
++			   that we do not support routing by TOS,
+ 			   and MSG_DONTROUTE 		--ANK (980726)
+ 
+ 			   1. If route was host route, check that
+@@ -548,6 +585,13 @@
+ 		      ipv6_addr_cmp(fl->fl6_dst, &rt->rt6i_dst.addr))
+ 		     && (np->daddr_cache == NULL ||
+ 			 ipv6_addr_cmp(fl->fl6_dst, np->daddr_cache)))
++#ifdef CONFIG_IPV6_SUBTREES
++		    || (fl->fl6_src != NULL
++			&& (rt->rt6i_src.plen != 128 ||
++			    ipv6_addr_cmp(fl->fl6_src, &rt->rt6i_src.addr))
++			&& (np->saddr_cache == NULL ||
++			    ipv6_addr_cmp(fl->fl6_src, np->saddr_cache)))
++#endif
+ 		    || (fl->oif && fl->oif != dst->dev->ifindex)) {
+ 			dst = NULL;
+ 		} else
+@@ -560,21 +604,42 @@
+ 	if (dst->error) {
+ 		IP6_INC_STATS(Ip6OutNoRoutes);
+ 		dst_release(dst);
++		ip6_free_mipv6_txoptions(opt, orig_opt);
+ 		return -ENETUNREACH;
+ 	}
+ 
+ 	if (fl->fl6_src == NULL) {
+ 		err = ipv6_get_saddr(dst, fl->fl6_dst, &saddr);
+-
+ 		if (err) {
+ #if IP6_DEBUG >= 2
+ 			printk(KERN_DEBUG "ip6_build_xmit: "
+ 			       "no available source address\n");
+ #endif
++
++#ifdef CONFIG_IPV6_SUBTREES
++			if (dst != org_dst) {
++				dst_release(dst);
++				dst = org_dst;
++			}
++#endif		
+ 			goto out;
+ 		}
+ 		fl->fl6_src = &saddr;
+ 	}
++#ifdef CONFIG_IPV6_SUBTREES
++	rt = (struct rt6_info*)dst;
++	if (dst != org_dst || rt->rt6i_src.plen != 128 ||
++	    ipv6_addr_cmp(fl->fl6_src, &rt->rt6i_src.addr)) {
++		dst_release(dst);
++		dst = ip6_route_output(sk, fl);
++		if (dst->error) {
++			IP6_INC_STATS(Ip6OutNoRoutes);
++			dst_release(dst);
++			ip6_free_mipv6_txoptions(opt, orig_opt);
++			return -ENETUNREACH;
++		}
++	}
++#endif
+ 	pktlength = length;
+ 
+ 	if (hlimit < 0) {
+@@ -667,6 +732,7 @@
+ 
+ 		if (!err) {
+ 			IP6_INC_STATS(Ip6OutRequests);
++			ip6_mark_mipv6_packet(opt, skb);
+ 			err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
+ 		} else {
+ 			err = -EFAULT;
+@@ -688,9 +754,14 @@
+ 	 *	cleanup
+ 	 */
+ out:
+-	ip6_dst_store(sk, dst, fl->nl_u.ip6_u.daddr == &np->daddr ? &np->daddr : NULL);
++	ip6_dst_store(sk, dst, 
++		      fl->nl_u.ip6_u.daddr == &np->daddr ? &np->daddr : NULL,
++		      fl->nl_u.ip6_u.saddr == &np->saddr ? &np->saddr : NULL);
+ 	if (err > 0)
+ 		err = np->recverr ? net_xmit_errno(err) : 0;
++
++	ip6_free_mipv6_txoptions(opt, orig_opt);
++
+ 	return err;
+ }
+ 
+@@ -769,6 +840,15 @@
+ 		return -ETIMEDOUT;
+ 	}
+ 
++	/* The proxying router can't forward traffic sent to a link-local
++	   address, so signal the sender and discard the packet. This
++	   behavior is required by the MIPv6 specification. */
++
++	if (ipv6_addr_type(&hdr->daddr) & IPV6_ADDR_LINKLOCAL && 
++	    skb->dev && pneigh_lookup(&nd_tbl, &hdr->daddr, skb->dev, 0)) {
++		dst_link_failure(skb);
++		goto drop;
++	}
+ 	/* IPv6 specs say nothing about it, but it is clear that we cannot
+ 	   send redirects to source routed frames.
+ 	 */
+--- linux-2.4.27/net/ipv6/ipv6_syms.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/ipv6_syms.c
+@@ -6,6 +6,8 @@
+ #include <net/ipv6.h>
+ #include <net/addrconf.h>
+ #include <net/ip6_route.h>
++#include <net/ndisc.h>
++#include <net/mipglue.h>
+ 
+ EXPORT_SYMBOL(ipv6_addr_type);
+ EXPORT_SYMBOL(icmpv6_send);
+@@ -35,3 +37,47 @@
+ EXPORT_SYMBOL(in6_dev_finish_destroy);
+ EXPORT_SYMBOL(ipv6_skip_exthdr);
+ 
++#if defined(CONFIG_IPV6_TUNNEL_MODULE) || defined(CONFIG_IPV6_MOBILITY_MODULE)
++EXPORT_SYMBOL(ip6_build_xmit);
++EXPORT_SYMBOL(rt6_lookup);
++EXPORT_SYMBOL(ipv6_ext_hdr);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_MODULE
++EXPORT_SYMBOL(mipv6_functions);
++EXPORT_SYMBOL(mipv6_invalidate_calls);
++#if defined(CONFIG_IPV6_MOBILITY_HA_MODULE) || defined(CONFIG_IPV6_MOBILITY_MN_MODULE)
++EXPORT_SYMBOL(ip6_route_add);
++EXPORT_SYMBOL(ip6_route_del);
++EXPORT_SYMBOL(ipv6_get_lladdr);
++EXPORT_SYMBOL(ipv6_get_ifaddr);
++EXPORT_SYMBOL(nd_tbl);
++EXPORT_SYMBOL(ndisc_send_ns);
++EXPORT_SYMBOL(ndisc_send_na);
++EXPORT_SYMBOL(ndisc_next_option);
++EXPORT_SYMBOL(inet6_ifa_finish_destroy);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_HA_MODULE
++EXPORT_SYMBOL(ipv6_dev_ac_dec);
++EXPORT_SYMBOL(ipv6_dev_ac_inc);
++EXPORT_SYMBOL(ipv6_dev_mc_dec);
++EXPORT_SYMBOL(ipv6_dev_mc_inc);
++EXPORT_SYMBOL(ip6_forward);
++EXPORT_SYMBOL(ip6_input);
++EXPORT_SYMBOL(ipv6_chk_acast_addr);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_MN_MODULE
++#endif
++EXPORT_SYMBOL(addrconf_add_ifaddr);
++EXPORT_SYMBOL(addrconf_del_ifaddr);
++EXPORT_SYMBOL(addrconf_dad_start);
++EXPORT_SYMBOL(ip6_del_rt);
++EXPORT_SYMBOL(ip6_routing_table);
++EXPORT_SYMBOL(rt6_get_dflt_router);
++EXPORT_SYMBOL(rt6_purge_dflt_routers);
++EXPORT_SYMBOL(rt6_lock);
++EXPORT_SYMBOL(ndisc_send_rs);
++EXPORT_SYMBOL(fib6_clean_tree);
++EXPORT_SYMBOL(ipv6_del_addr);
++EXPORT_SYMBOL(ipv6_generate_eui64);
++EXPORT_SYMBOL(ipv6_inherit_eui64);
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/ipv6_tunnel.c
+@@ -0,0 +1,1604 @@
++/*
++ *	IPv6 over IPv6 tunnel device
++ *	Linux INET6 implementation
++ *
++ *	Authors:
++ *	Ville Nuorvala		<vnuorval@tcs.hut.fi>	
++ *
++ *	$Id$
++ *
++ *      Based on:
++ *      linux/net/ipv6/sit.c
++ *
++ *      RFC 2473
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/errno.h>
++#include <linux/types.h>
++#include <linux/socket.h>
++#include <linux/sockios.h>
++#include <linux/if.h>
++#include <linux/in.h>
++#include <linux/ip.h>
++#include <linux/if_tunnel.h>
++#include <linux/net.h>
++#include <linux/in6.h>
++#include <linux/netdevice.h>
++#include <linux/if_arp.h>
++#include <linux/icmpv6.h>
++#include <linux/init.h>
++#include <linux/route.h>
++#include <linux/rtnetlink.h>
++#include <linux/tqueue.h>
++
++#include <asm/uaccess.h>
++#include <asm/atomic.h>
++
++#include <net/sock.h>
++#include <net/ipv6.h>
++#include <net/protocol.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/ipv6_tunnel.h>
++
++MODULE_AUTHOR("Ville Nuorvala");
++MODULE_DESCRIPTION("IPv6-in-IPv6 tunnel");
++MODULE_LICENSE("GPL");
++
++#define IPV6_TLV_TEL_DST_SIZE 8
++
++#ifdef IP6_TNL_DEBUG
++#define IP6_TNL_TRACE(x...) printk(KERN_DEBUG "%s:" x "\n", __FUNCTION__)
++#else
++#define IP6_TNL_TRACE(x...) do {;} while(0)
++#endif
++
++#define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK)
++
++#define HASH_SIZE  32
++
++#define HASH(addr) (((addr)->s6_addr32[0] ^ (addr)->s6_addr32[1] ^ \
++	             (addr)->s6_addr32[2] ^ (addr)->s6_addr32[3]) & \
++                    (HASH_SIZE - 1))
++
++static int ip6ip6_fb_tnl_dev_init(struct net_device *dev);
++static int ip6ip6_tnl_dev_init(struct net_device *dev);
++
++/* the IPv6 IPv6 tunnel fallback device */
++static struct net_device ip6ip6_fb_tnl_dev = {
++	name: "ip6tnl0",
++	init: ip6ip6_fb_tnl_dev_init
++};
++
++/* the IPv6 IPv6 fallback tunnel */
++static struct ip6_tnl ip6ip6_fb_tnl = {
++	dev: &ip6ip6_fb_tnl_dev,
++	parms:{name: "ip6tnl0", proto: IPPROTO_IPV6}
++};
++
++/* lists for storing tunnels in use */
++static struct ip6_tnl *tnls_r_l[HASH_SIZE];
++static struct ip6_tnl *tnls_wc[1];
++static struct ip6_tnl **tnls[2] = { tnls_wc, tnls_r_l };
++
++/* list for unused cached kernel tunnels */
++static struct ip6_tnl *tnls_kernel[1];
++/* maximum number of cached kernel tunnels */
++static unsigned int max_kdev_count = 0;
++/* minimum number of cached kernel tunnels */
++static unsigned int min_kdev_count = 0;
++/* current number of cached kernel tunnels */
++static unsigned int kdev_count = 0;
++
++/* lists for tunnel hook functions */
++static struct list_head hooks[IP6_TNL_MAXHOOKS];
++
++/* locks for the different lists */
++static rwlock_t ip6ip6_lock = RW_LOCK_UNLOCKED;
++static rwlock_t ip6ip6_kernel_lock = RW_LOCK_UNLOCKED;
++static rwlock_t ip6ip6_hook_lock = RW_LOCK_UNLOCKED;
++
++/* flag indicating if the module is being removed */
++static int shutdown = 0;
++
++/**
++ * ip6ip6_tnl_lookup - fetch tunnel matching the end-point addresses
++ *   @remote: the address of the tunnel exit-point 
++ *   @local: the address of the tunnel entry-point 
++ *
++ * Return:  
++ *   tunnel matching given end-points if found,
++ *   else fallback tunnel if its device is up, 
++ *   else %NULL
++ **/
++
++struct ip6_tnl *
++ip6ip6_tnl_lookup(struct in6_addr *remote, struct in6_addr *local)
++{
++	unsigned h0 = HASH(remote);
++	unsigned h1 = HASH(local);
++	struct ip6_tnl *t;
++
++	for (t = tnls_r_l[h0 ^ h1]; t; t = t->next) {
++		if (!ipv6_addr_cmp(local, &t->parms.laddr) &&
++		    !ipv6_addr_cmp(remote, &t->parms.raddr) &&
++		    (t->dev->flags & IFF_UP))
++			return t;
++	}
++	if ((t = tnls_wc[0]) != NULL && (t->dev->flags & IFF_UP))
++		return t;
++
++	return NULL;
++}
++
++/**
++ * ip6ip6_bucket - get head of list matching given tunnel parameters
++ *   @p: parameters containing tunnel end-points 
++ *
++ * Description:
++ *   ip6ip6_bucket() returns the head of the list matching the 
++ *   &struct in6_addr entries laddr and raddr in @p.
++ *
++ * Return: head of IPv6 tunnel list 
++ **/
++
++static struct ip6_tnl **
++ip6ip6_bucket(struct ip6_tnl_parm *p)
++{
++	struct in6_addr *remote = &p->raddr;
++	struct in6_addr *local = &p->laddr;
++	unsigned h = 0;
++	int prio = 0;
++
++	if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) {
++		prio = 1;
++		h = HASH(remote) ^ HASH(local);
++	}
++	return &tnls[prio][h];
++}
++
++/**
++ * ip6ip6_kernel_tnl_link - add new kernel tunnel to cache
++ *   @t: kernel tunnel
++ *
++ * Note:
++ *   %IP6_TNL_F_KERNEL_DEV is assumed to be raised in t->parms.flags. 
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information.
++ **/
++
++static inline void
++ip6ip6_kernel_tnl_link(struct ip6_tnl *t)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	t->next = tnls_kernel[0];
++	tnls_kernel[0] = t;
++	kdev_count++;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++}
++
++/**
++ * ip6ip6_kernel_tnl_unlink - remove first kernel tunnel from cache
++ *
++ * Return: first free kernel tunnel
++ *
++ * Note:
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information.
++ **/
++
++static inline struct ip6_tnl *
++ip6ip6_kernel_tnl_unlink(void)
++{
++	struct ip6_tnl *t;
++
++	write_lock_bh(&ip6ip6_kernel_lock);
++	if ((t = tnls_kernel[0]) != NULL) {
++		tnls_kernel[0] = t->next;
++		kdev_count--;
++	}
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	return t;
++}
++
++/**
++ * ip6ip6_tnl_link - add tunnel to hash table
++ *   @t: tunnel to be added
++ **/
++
++static void
++ip6ip6_tnl_link(struct ip6_tnl *t)
++{
++	struct ip6_tnl **tp = ip6ip6_bucket(&t->parms);
++
++	write_lock_bh(&ip6ip6_lock);
++	t->next = *tp;
++	*tp = t;
++	write_unlock_bh(&ip6ip6_lock);
++}
++
++/**
++ * ip6ip6_tnl_unlink - remove tunnel from hash table
++ *   @t: tunnel to be removed
++ **/
++
++static void
++ip6ip6_tnl_unlink(struct ip6_tnl *t)
++{
++	struct ip6_tnl **tp;
++	
++	write_lock_bh(&ip6ip6_lock);
++	for (tp = ip6ip6_bucket(&t->parms); *tp; tp = &(*tp)->next) {
++		if (t == *tp) {
++			*tp = t->next;
++			break;
++		}
++	}
++	write_unlock_bh(&ip6ip6_lock);
++}
++
++/**
++ * ip6ip6_tnl_create() - create a new tunnel
++ *   @p: tunnel parameters
++ *   @pt: pointer to new tunnel
++ *
++ * Description:
++ *   Create tunnel matching given parameters. New kernel managed devices are 
++ *   not put in the normal hash structure, but are instead cached for later
++ *   use.
++ * 
++ * Return: 
++ *   0 on success
++ **/
++
++
++static int __ip6ip6_tnl_create(struct ip6_tnl_parm *p,
++			       struct ip6_tnl **pt,
++			       int kernel_list)
++{
++	struct net_device *dev;
++	int err = -ENOBUFS;
++	struct ip6_tnl *t;
++
++	MOD_INC_USE_COUNT;
++	dev = kmalloc(sizeof (*dev) + sizeof (*t), GFP_KERNEL);
++	if (!dev) {
++		MOD_DEC_USE_COUNT;
++		return err;
++	}
++	memset(dev, 0, sizeof (*dev) + sizeof (*t));
++	dev->priv = (void *) (dev + 1);
++	t = (struct ip6_tnl *) dev->priv;
++	t->dev = dev;
++	dev->init = ip6ip6_tnl_dev_init;
++	dev->features |= NETIF_F_DYNALLOC;
++	if (kernel_list) {
++		memcpy(t->parms.name, p->name, IFNAMSIZ - 1);
++		t->parms.proto = IPPROTO_IPV6;
++		t->parms.flags = IP6_TNL_F_KERNEL_DEV;
++	} else {
++		memcpy(&t->parms, p, sizeof (*p));
++	}
++	t->parms.name[IFNAMSIZ - 1] = '\0';
++	strcpy(dev->name, t->parms.name);
++	if (!dev->name[0]) {
++		int i;
++		for (i = 0; i < IP6_TNL_MAX; i++) {
++			sprintf(dev->name, "ip6tnl%d", i);
++			if (__dev_get_by_name(dev->name) == NULL)
++				break;
++		}
++
++		if (i == IP6_TNL_MAX) {
++			goto failed;
++		}
++		memcpy(t->parms.name, dev->name, IFNAMSIZ);
++	}
++	if ((err = register_netdevice(dev)) < 0) {
++		goto failed;
++	}
++	dev_hold(dev);
++	if (kernel_list) {
++		ip6ip6_kernel_tnl_link(t);
++	} else {
++		ip6ip6_tnl_link(t);
++	}
++	*pt = t;
++	return 0;
++failed:
++	kfree(dev);
++	MOD_DEC_USE_COUNT;
++	return err;
++}
++
++
++int ip6ip6_tnl_create(struct ip6_tnl_parm *p, struct ip6_tnl **pt)
++{
++	return __ip6ip6_tnl_create(p, pt, 0);
++}
++
++
++static void manage_kernel_tnls(void *foo);
++
++static struct tq_struct manager_task = {
++	routine:manage_kernel_tnls,
++	data:NULL
++};
++
++/**
++ * manage_kernel_tnls() - create and destroy kernel tunnels
++ *
++ * Description:
++ *   manage_kernel_tnls() creates new kernel devices if there
++ *   are less than $min_kdev_count of them and deletes old ones if
++ *   there are less than $max_kdev_count of them in the cache
++ *
++ * Note:
++ *   Schedules itself to be run later in process context if called from 
++ *   interrupt. Therefore only works synchronously when called from process 
++ *   context.
++ **/
++
++static void
++manage_kernel_tnls(void *foo)
++{
++	struct ip6_tnl *t = NULL;
++	struct ip6_tnl_parm parm;
++
++	/* We can't do this processing in interrupt 
++	   context so schedule it for later */
++	if (in_interrupt()) {
++		read_lock(&ip6ip6_kernel_lock);
++		if (!shutdown &&
++		    (kdev_count < min_kdev_count ||
++		     kdev_count > max_kdev_count)) {
++			schedule_task(&manager_task);
++		}
++		read_unlock(&ip6ip6_kernel_lock);
++		return;
++	}
++
++	rtnl_lock();
++	read_lock_bh(&ip6ip6_kernel_lock);
++	memset(&parm, 0, sizeof (parm));
++	parm.flags = IP6_TNL_F_KERNEL_DEV;
++	/* Create tunnels until there are at least min_kdev_count */
++	while (kdev_count < min_kdev_count) {
++		read_unlock_bh(&ip6ip6_kernel_lock);
++		if (!__ip6ip6_tnl_create(&parm, &t, 1)) {
++			dev_open(t->dev);
++		} else {
++			goto err;
++		}
++		read_lock_bh(&ip6ip6_kernel_lock);
++	}
++
++	/* Destroy tunnels until there are at most max_kdev_count */
++	while (kdev_count > max_kdev_count) {
++		read_unlock_bh(&ip6ip6_kernel_lock);
++		if ((t = ip6ip6_kernel_tnl_unlink()) != NULL) {
++			unregister_netdevice(t->dev);
++		} else {
++			goto err;
++		}
++		read_lock_bh(&ip6ip6_kernel_lock);
++	}
++	read_unlock_bh(&ip6ip6_kernel_lock);
++err:
++	rtnl_unlock();
++}
++
++/**
++ * ip6ip6_tnl_inc_max_kdev_count() - increase max kernel dev cache size
++ *   @n: size increase
++ * Description:
++ *   Increase the upper limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_inc_max_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	max_kdev_count += n;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return max_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_dec_max_kdev_count() -  decrease max kernel dev cache size
++ *   @n: size decrement
++ * Description:
++ *   Decrease the upper limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_dec_max_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	max_kdev_count -= min(max_kdev_count, n);
++	if (max_kdev_count < min_kdev_count)
++		min_kdev_count = max_kdev_count;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return max_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_inc_min_kdev_count() - increase min kernel dev cache size
++ *   @n: size increase
++ * Description:
++ *   Increase the lower limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_inc_min_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	min_kdev_count += n;
++	if (min_kdev_count > max_kdev_count)
++		max_kdev_count = min_kdev_count;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return min_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_dec_min_kdev_count() -  decrease min kernel dev cache size
++ *   @n: size decrement
++ * Description:
++ *   Decrease the lower limit for the number of kernel devices allowed in the 
++ *   cache at any on time.
++ **/
++
++unsigned int
++ip6ip6_tnl_dec_min_kdev_count(unsigned int n)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	min_kdev_count -= min(min_kdev_count, n);
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	manage_kernel_tnls(NULL);
++	return min_kdev_count;
++}
++
++/**
++ * ip6ip6_tnl_locate - find or create tunnel matching given parameters
++ *   @p: tunnel parameters 
++ *   @create: != 0 if allowed to create new tunnel if no match found
++ *
++ * Description:
++ *   ip6ip6_tnl_locate() first tries to locate an existing tunnel
++ *   based on @parms. If this is unsuccessful, but @create is set a new
++ *   tunnel device is created and registered for use.
++ *
++ * Return:
++ *   0 if tunnel located or created,
++ *   -EINVAL if parameters incorrect,
++ *   -ENODEV if no matching tunnel available
++ **/
++
++int ip6ip6_tnl_locate(struct ip6_tnl_parm *p, struct ip6_tnl **pt, int create)
++{
++	struct in6_addr *remote = &p->raddr;
++	struct in6_addr *local = &p->laddr;
++	struct ip6_tnl *t;
++
++	if (p->proto != IPPROTO_IPV6)
++		return -EINVAL;
++
++	for (t = *ip6ip6_bucket(p); t; t = t->next) {
++		if (!ipv6_addr_cmp(local, &t->parms.laddr) &&
++		    !ipv6_addr_cmp(remote, &t->parms.raddr)) {
++			*pt = t;
++			return (create ? -EEXIST : 0);
++		}
++	}
++	return ip6ip6_tnl_create(p, pt);
++}
++
++/**
++ * ip6ip6_tnl_dev_destructor - tunnel device destructor
++ *   @dev: the device to be destroyed
++ **/
++
++static void
++ip6ip6_tnl_dev_destructor(struct net_device *dev)
++{
++	if (dev != &ip6ip6_fb_tnl_dev) {
++		MOD_DEC_USE_COUNT;
++	}
++}
++
++/**
++ * ip6ip6_tnl_dev_uninit - tunnel device uninitializer
++ *   @dev: the device to be destroyed
++ *   
++ * Description:
++ *   ip6ip6_tnl_dev_uninit() removes tunnel from its list
++ **/
++
++static void
++ip6ip6_tnl_dev_uninit(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++
++	if (dev == &ip6ip6_fb_tnl_dev) {
++		write_lock_bh(&ip6ip6_lock);
++		tnls_wc[0] = NULL;
++		write_unlock_bh(&ip6ip6_lock);
++	} else {
++		ip6ip6_tnl_unlink(t);
++	}
++	sock_release(t->sock);
++	dev_put(dev);
++}
++
++/**
++ * parse_tvl_tnl_enc_lim - handle encapsulation limit option
++ *   @skb: received socket buffer
++ *
++ * Return: 
++ *   0 if none was found, 
++ *   else index to encapsulation limit
++ **/
++
++static __u16
++parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw)
++{
++	struct ipv6hdr *ipv6h = (struct ipv6hdr *) raw;
++	__u8 nexthdr = ipv6h->nexthdr;
++	__u16 off = sizeof (*ipv6h);
++
++	while (ipv6_ext_hdr(nexthdr) && nexthdr != NEXTHDR_NONE) {
++		__u16 optlen = 0;
++		struct ipv6_opt_hdr *hdr;
++		if (raw + off + sizeof (*hdr) > skb->data &&
++		    !pskb_may_pull(skb, raw - skb->data + off + sizeof (*hdr)))
++			break;
++
++		hdr = (struct ipv6_opt_hdr *) (raw + off);
++		if (nexthdr == NEXTHDR_FRAGMENT) {
++			struct frag_hdr *frag_hdr = (struct frag_hdr *) hdr;
++			if (frag_hdr->frag_off)
++				break;
++			optlen = 8;
++		} else if (nexthdr == NEXTHDR_AUTH) {
++			optlen = (hdr->hdrlen + 2) << 2;
++		} else {
++			optlen = ipv6_optlen(hdr);
++		}
++		if (nexthdr == NEXTHDR_DEST) {
++			__u16 i = off + 2;
++			while (1) {
++				struct ipv6_tlv_tnl_enc_lim *tel;
++
++				/* No more room for encapsulation limit */
++				if (i + sizeof (*tel) > off + optlen)
++					break;
++
++				tel = (struct ipv6_tlv_tnl_enc_lim *) &raw[i];
++				/* return index of option if found and valid */
++				if (tel->type == IPV6_TLV_TNL_ENCAP_LIMIT &&
++				    tel->length == 1)
++					return i;
++				/* else jump to next option */
++				if (tel->type)
++					i += tel->length + 2;
++				else
++					i++;
++			}
++		}
++		nexthdr = hdr->nexthdr;
++		off += optlen;
++	}
++	return 0;
++}
++
++/**
++ * ip6ip6_err - tunnel error handler
++ *
++ * Description:
++ *   ip6ip6_err() should handle errors in the tunnel according
++ *   to the specifications in RFC 2473.
++ **/
++
++void ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
++		   int type, int code, int offset, __u32 info)
++{
++	struct ipv6hdr *ipv6h = (struct ipv6hdr *) skb->data;
++	struct ip6_tnl *t;
++	int rel_msg = 0;
++	int rel_type = ICMPV6_DEST_UNREACH;
++	int rel_code = ICMPV6_ADDR_UNREACH;
++	__u32 rel_info = 0;
++	__u16 len;
++
++	/* If the packet doesn't contain the original IPv6 header we are 
++	   in trouble since we might need the source address for furter 
++	   processing of the error. */
++
++	read_lock(&ip6ip6_lock);
++	if ((t = ip6ip6_tnl_lookup(&ipv6h->daddr, &ipv6h->saddr)) == NULL)
++		goto out;
++
++	switch (type) {
++		__u32 teli;
++		struct ipv6_tlv_tnl_enc_lim *tel;
++		__u32 mtu;
++	case ICMPV6_DEST_UNREACH:
++		if (net_ratelimit())
++			printk(KERN_WARNING
++			       "%s: Path to destination invalid "
++			       "or inactive!\n", t->parms.name);
++		rel_msg = 1;
++		break;
++	case ICMPV6_TIME_EXCEED:
++		if (code == ICMPV6_EXC_HOPLIMIT) {
++			if (net_ratelimit())
++				printk(KERN_WARNING
++				       "%s: Too small hop limit or "
++				       "routing loop in tunnel!\n", 
++				       t->parms.name);
++			rel_msg = 1;
++		}
++		break;
++	case ICMPV6_PARAMPROB:
++		/* ignore if parameter problem not caused by a tunnel
++		   encapsulation limit sub-option */
++		if (code != ICMPV6_HDR_FIELD) {
++			break;
++		}
++		teli = parse_tlv_tnl_enc_lim(skb, skb->data);
++
++		if (teli && teli == ntohl(info) - 2) {
++			tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli];
++			if (tel->encap_limit == 0) {
++				if (net_ratelimit())
++					printk(KERN_WARNING
++					       "%s: Too small encapsulation "
++					       "limit or routing loop in "
++					       "tunnel!\n", t->parms.name);
++				rel_msg = 1;
++			}
++		}
++		break;
++	case ICMPV6_PKT_TOOBIG:
++		mtu = ntohl(info) - offset;
++		if (mtu < IPV6_MIN_MTU)
++			mtu = IPV6_MIN_MTU;
++		t->dev->mtu = mtu;
++
++		if ((len = sizeof (*ipv6h) + ipv6h->payload_len) > mtu) {
++			rel_type = ICMPV6_PKT_TOOBIG;
++			rel_code = 0;
++			rel_info = mtu;
++			rel_msg = 1;
++		}
++		break;
++	}
++	if (rel_msg && pskb_may_pull(skb, offset + sizeof (*ipv6h))) {
++		struct rt6_info *rt;
++		struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
++		if (!skb2)
++			goto out;
++
++		dst_release(skb2->dst);
++		skb2->dst = NULL;
++		skb_pull(skb2, offset);
++		skb2->nh.raw = skb2->data;
++
++		/* Try to guess incoming interface */
++		rt = rt6_lookup(&skb2->nh.ipv6h->saddr, NULL, 0, 0);
++
++		if (rt && rt->rt6i_dev)
++			skb2->dev = rt->rt6i_dev;
++
++		icmpv6_send(skb2, rel_type, rel_code, rel_info, skb2->dev);
++
++		if (rt)
++			dst_release(&rt->u.dst);
++
++		kfree_skb(skb2);
++	}
++out:
++	read_unlock(&ip6ip6_lock);
++}
++
++/**
++ * call_hooks - call ipv6 tunnel hooks
++ *   @hooknum: hook number, either %IP6_TNL_PRE_ENCAP, or 
++ *   %IP6_TNL_PRE_DECAP
++ *   @t: the current tunnel
++ *   @skb: the tunneled packet
++ *
++ * Description:
++ *   Pass packet to all the hook functions until %IP6_TNL_DROP
++ *
++ * Return:
++ *   %IP6_TNL_ACCEPT or %IP6_TNL_DROP
++ **/
++
++static inline int
++call_hooks(unsigned int hooknum, struct ip6_tnl *t, struct sk_buff *skb)
++{
++	struct ip6_tnl_hook_ops *h;
++	int accept = IP6_TNL_ACCEPT;
++
++	if (hooknum < IP6_TNL_MAXHOOKS) {
++		struct list_head *i;
++		read_lock(&ip6ip6_hook_lock);
++		for (i = hooks[hooknum].next; i != &hooks[hooknum]; i = i->next) {
++			h = (struct ip6_tnl_hook_ops *) i;
++
++			if (h->hook) {
++				accept = h->hook(t, skb);
++
++				if (accept != IP6_TNL_ACCEPT)
++					break;
++			}
++		}
++		read_unlock(&ip6ip6_hook_lock);
++	}
++	return accept;
++}
++
++/**
++ * ip6ip6_rcv - decapsulate IPv6 packet and retransmit it locally
++ *   @skb: received socket buffer
++ *
++ * Return: 0
++ **/
++
++int ip6ip6_rcv(struct sk_buff *skb)
++{
++	struct ipv6hdr *ipv6h;
++	struct ip6_tnl *t;
++
++	if (!pskb_may_pull(skb, sizeof (*ipv6h)))
++		goto discard;
++
++	ipv6h = skb->nh.ipv6h;
++
++	read_lock(&ip6ip6_lock);
++
++	if ((t = ip6ip6_tnl_lookup(&ipv6h->saddr, &ipv6h->daddr)) != NULL) {
++		if (!(t->parms.flags & IP6_TNL_F_CAP_RCV) ||
++		    call_hooks(IP6_TNL_PRE_DECAP, t, skb) != IP6_TNL_ACCEPT) {
++			t->stat.rx_dropped++;
++			read_unlock(&ip6ip6_lock);
++			goto discard;
++		}
++		skb->mac.raw = skb->nh.raw;
++		skb->nh.raw = skb->data;
++		skb->protocol = htons(ETH_P_IPV6);
++		skb->pkt_type = PACKET_HOST;
++		memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
++		skb->dev = t->dev;
++		dst_release(skb->dst);
++		skb->dst = NULL;
++		t->stat.rx_packets++;
++		t->stat.rx_bytes += skb->len;
++		netif_rx(skb);
++		read_unlock(&ip6ip6_lock);
++		return 0;
++	}
++	read_unlock(&ip6ip6_lock);
++	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev);
++discard:
++	kfree_skb(skb);
++	return 0;
++}
++
++static inline struct ipv6_txoptions *create_tel(__u8 encap_limit)
++{
++	struct ipv6_tlv_tnl_enc_lim *tel;
++	struct ipv6_txoptions *opt;
++	__u8 *raw;
++
++	int opt_len = sizeof(*opt) + IPV6_TLV_TEL_DST_SIZE;
++
++	if (!(opt = kmalloc(opt_len, GFP_ATOMIC))) {
++		return NULL;
++	}
++	memset(opt, 0, opt_len);
++	opt->tot_len = opt_len;
++	opt->dst0opt = (struct ipv6_opt_hdr *) (opt + 1);
++	opt->opt_nflen = 8;
++
++	tel = (struct ipv6_tlv_tnl_enc_lim *) (opt->dst0opt + 1);
++	tel->type = IPV6_TLV_TNL_ENCAP_LIMIT;
++	tel->length = 1;
++	tel->encap_limit = encap_limit;
++
++	raw = (__u8 *) opt->dst0opt;
++	raw[5] = IPV6_TLV_PADN;
++	raw[6] = 1;
++
++	return opt;
++}
++
++static int
++ip6ip6_getfrag(const void *data, struct in6_addr *addr,
++		  char *buff, unsigned int offset, unsigned int len)
++{
++	memcpy(buff, data + offset, len);
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_addr_conflict - compare packet addresses to tunnel's own
++ *   @t: the outgoing tunnel device
++ *   @hdr: IPv6 header from the incoming packet 
++ *
++ * Description:
++ *   Avoid trivial tunneling loop by checking that tunnel exit-point 
++ *   doesn't match source of incoming packet.
++ *
++ * Return: 
++ *   1 if conflict,
++ *   0 else
++ **/
++
++static inline int
++ip6ip6_tnl_addr_conflict(struct ip6_tnl *t, struct ipv6hdr *hdr)
++{
++	return !ipv6_addr_cmp(&t->parms.raddr, &hdr->saddr);
++}
++
++/**
++ * ip6ip6_tnl_xmit - encapsulate packet and send 
++ *   @skb: the outgoing socket buffer
++ *   @dev: the outgoing tunnel device 
++ *
++ * Description:
++ *   Build new header and do some sanity checks on the packet before sending
++ *   it to ip6_build_xmit().
++ *
++ * Return: 
++ *   0
++ **/
++
++int ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++	struct net_device_stats *stats = &t->stat;
++	struct ipv6hdr *ipv6h = skb->nh.ipv6h;
++	struct ipv6_txoptions *opt = NULL;
++	int encap_limit = -1;
++	__u16 offset;
++	struct flowi fl;
++	int err = 0;
++	struct dst_entry *dst;
++	struct sock *sk = t->sock->sk;
++	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
++	int mtu;
++
++	if (t->recursion++) {
++		stats->collisions++;
++		goto tx_err;
++	}
++	if (skb->protocol != htons(ETH_P_IPV6) ||
++	    !(t->parms.flags & IP6_TNL_F_CAP_XMIT) ||
++	    ip6ip6_tnl_addr_conflict(t, ipv6h)) {
++		goto tx_err;
++	}
++	if ((offset = parse_tlv_tnl_enc_lim(skb, skb->nh.raw)) > 0) {
++		struct ipv6_tlv_tnl_enc_lim *tel;
++		tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->nh.raw[offset];
++		if (tel->encap_limit == 0) {
++			icmpv6_send(skb, ICMPV6_PARAMPROB,
++				    ICMPV6_HDR_FIELD, offset + 2, skb->dev);
++			goto tx_err;
++		}
++		encap_limit = tel->encap_limit - 1;
++	} else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) {
++		encap_limit = t->parms.encap_limit;
++	}
++	if (call_hooks(IP6_TNL_PRE_ENCAP, t, skb) != IP6_TNL_ACCEPT)
++		goto discard;
++	memcpy(&fl, &t->fl, sizeof (fl));
++
++	if ((t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS))
++		fl.fl6_flowlabel |= (*(__u32 *) ipv6h & IPV6_TCLASS_MASK);
++	if ((t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL))
++		fl.fl6_flowlabel |= (*(__u32 *) ipv6h & IPV6_FLOWLABEL_MASK);
++
++	if (encap_limit >= 0 && (opt = create_tel(encap_limit)) == NULL)
++		goto tx_err;
++
++	dst = __sk_dst_check(sk, np->dst_cookie);
++
++	if (dst) {
++		if (np->daddr_cache == NULL ||
++		    ipv6_addr_cmp(fl.fl6_dst, np->daddr_cache) ||
++#ifdef CONFIG_IPV6_SUBTREES
++		    np->saddr_cache == NULL ||
++		    ipv6_addr_cmp(fl.fl6_src, np->saddr_cache) ||
++#endif
++		    (fl.oif && fl.oif != dst->dev->ifindex)) {
++			dst = NULL;
++		} else {
++			dst_hold(dst);
++		}
++	}
++	if (dst == NULL) {
++		dst = ip6_route_output(sk, &fl);
++		if (dst->error) {
++			stats->tx_carrier_errors++;
++			dst_link_failure(skb);
++			goto tx_err_dst_release;
++		}
++		/* local routing loop */
++		if (dst->dev == dev) {
++			stats->collisions++;
++			if (net_ratelimit())
++				printk(KERN_WARNING 
++				       "%s: Local routing loop detected!\n",
++				       t->parms.name);
++			goto tx_err_dst_release;
++		}
++	}
++	mtu = dst->pmtu - sizeof (*ipv6h);
++	if (opt) {
++		mtu -= (opt->opt_nflen + opt->opt_flen);
++	}
++	if (mtu < IPV6_MIN_MTU)
++		mtu = IPV6_MIN_MTU;
++	if (skb->dst && mtu < skb->dst->pmtu) {
++		struct rt6_info *rt = (struct rt6_info *) skb->dst;
++		rt->rt6i_flags |= RTF_MODIFIED;
++		rt->u.dst.pmtu = mtu;
++	}
++	if (skb->len > mtu) {
++		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev);
++		goto tx_err_dst_release;
++	}
++	ip6_dst_store(sk, dst, &np->daddr, &np->saddr);
++	err = ip6_build_xmit(sk, ip6ip6_getfrag, (void *) skb->nh.raw,
++			     &fl, skb->len, opt, t->parms.hop_limit,
++			     MSG_DONTWAIT);
++
++	if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) {
++		stats->tx_bytes += skb->len;
++		stats->tx_packets++;
++	} else {
++		stats->tx_errors++;
++		stats->tx_aborted_errors++;
++	}
++	if (opt)
++		kfree(opt);
++	kfree_skb(skb);
++	t->recursion--;
++	return 0;
++tx_err_dst_release:
++	dst_release(dst);
++	if (opt)
++		kfree(opt);
++tx_err:
++	stats->tx_errors++;
++discard:
++	stats->tx_dropped++;
++	kfree_skb(skb);
++	t->recursion--;
++	return 0;
++}
++
++static void ip6_tnl_set_cap(struct ip6_tnl *t)
++{
++	struct ip6_tnl_parm *p = &t->parms;
++	struct in6_addr *laddr = &p->laddr;
++	struct in6_addr *raddr = &p->raddr;
++	int ltype = ipv6_addr_type(laddr);
++	int rtype = ipv6_addr_type(raddr);
++
++	p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV);
++
++	if (ltype != IPV6_ADDR_ANY && rtype != IPV6_ADDR_ANY &&
++	    ((ltype|rtype) &
++	     (IPV6_ADDR_UNICAST|
++	      IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL|
++	      IPV6_ADDR_MAPPED|IPV6_ADDR_RESERVED)) == IPV6_ADDR_UNICAST) {
++		struct net_device *ldev = NULL;
++		int l_ok = 1;
++		int r_ok = 1;
++
++		if (p->link)
++			ldev = dev_get_by_index(p->link);
++
++		if ((ltype&IPV6_ADDR_UNICAST) && !ipv6_chk_addr(laddr, ldev))
++			l_ok = 0;
++
++		if ((rtype&IPV6_ADDR_UNICAST) && ipv6_chk_addr(raddr, NULL))
++			r_ok = 0;
++
++		if (l_ok && r_ok) {
++			if (ltype&IPV6_ADDR_UNICAST)
++				p->flags |= IP6_TNL_F_CAP_XMIT;
++			if (rtype&IPV6_ADDR_UNICAST)
++				p->flags |= IP6_TNL_F_CAP_RCV;
++ 		}
++		if (ldev)
++			dev_put(ldev);
++ 	}
++}
++
++static void ip6ip6_tnl_link_config(struct ip6_tnl *t)
++{
++	struct net_device *dev = t->dev;
++	struct ip6_tnl_parm *p = &t->parms;
++	struct flowi *fl = &t->fl;
++
++	/* Set up flowi template */
++	fl->fl6_src = &p->laddr;
++	fl->fl6_dst = &p->raddr;
++	fl->oif = p->link;
++	fl->fl6_flowlabel = 0;
++
++	if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS))
++		fl->fl6_flowlabel |= IPV6_TCLASS_MASK & htonl(p->flowinfo);
++	if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL))
++		fl->fl6_flowlabel |= IPV6_FLOWLABEL_MASK & htonl(p->flowinfo);
++
++	ip6_tnl_set_cap(t);
++
++	if (p->flags&IP6_TNL_F_CAP_XMIT && p->flags&IP6_TNL_F_CAP_RCV)
++		dev->flags |= IFF_POINTOPOINT;
++	else
++		dev->flags &= ~IFF_POINTOPOINT;
++
++	if (p->flags & IP6_TNL_F_CAP_XMIT) {
++		struct rt6_info *rt = rt6_lookup(&p->raddr, &p->laddr,
++						 p->link, 0);
++		
++		if (rt == NULL)
++			return;
++		
++		if (rt->rt6i_dev) {
++			dev->iflink = rt->rt6i_dev->ifindex;
++
++			dev->hard_header_len = rt->rt6i_dev->hard_header_len +
++				sizeof (struct ipv6hdr);
++
++			dev->mtu = rt->rt6i_dev->mtu - sizeof (struct ipv6hdr);
++
++			if (dev->mtu < IPV6_MIN_MTU)
++				dev->mtu = IPV6_MIN_MTU;
++		}
++		dst_release(&rt->u.dst);
++	}
++}
++
++/**
++ * __ip6ip6_tnl_change - update the tunnel parameters
++ *   @t: tunnel to be changed
++ *   @p: tunnel configuration parameters
++ *
++ * Description:
++ *   __ip6ip6_tnl_change() updates the tunnel parameters
++ **/
++
++static void
++__ip6ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p)
++{
++	ipv6_addr_copy(&t->parms.laddr, &p->laddr);
++	ipv6_addr_copy(&t->parms.raddr, &p->raddr);
++	t->parms.flags = p->flags;
++	t->parms.hop_limit = p->hop_limit;
++	t->parms.encap_limit = p->encap_limit;
++	t->parms.flowinfo = p->flowinfo;
++	ip6ip6_tnl_link_config(t);
++}
++
++void ip6ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p)
++{
++	ip6ip6_tnl_unlink(t);
++	__ip6ip6_tnl_change(t, p);
++	ip6ip6_tnl_link(t);
++}
++
++/**
++ * ip6ip6_kernel_tnl_add - configure and add kernel tunnel to hash 
++ *   @p: kernel tunnel configuration parameters
++ *
++ * Description:
++ *   ip6ip6_kernel_tnl_add() fetches an unused kernel tunnel configures
++ *   it according to @p and places it among the active tunnels.
++ * 
++ * Return:
++ *   number of references to tunnel on success,
++ *   %-EEXIST if there is already a device matching description
++ *   %-EINVAL if p->flags doesn't have %IP6_TNL_F_KERNEL_DEV raised,
++ *   %-ENODEV if there are no unused kernel tunnels available 
++ * 
++ * Note:
++ *   The code for creating, opening, closing and destroying network devices
++ *   must be called from process context, while the Mobile IP code, which 
++ *   needs the tunnel devices, unfortunately runs in interrupt context. 
++ *   
++ *   The devices must be created and opened in advance, then placed in a 
++ *   list where the kernel can fetch and ready them for use at a later time.
++ *
++ **/
++
++int
++ip6ip6_kernel_tnl_add(struct ip6_tnl_parm *p)
++{
++	struct ip6_tnl *t;
++
++	if (!(p->flags & IP6_TNL_F_KERNEL_DEV))
++		return -EINVAL;
++	if ((t = ip6ip6_tnl_lookup(&p->raddr, &p->laddr)) != NULL &&
++	    t != &ip6ip6_fb_tnl) {
++		/* Handle duplicate tunnels by incrementing 
++		   reference count */
++		atomic_inc(&t->refcnt);
++		goto out;
++	}
++	if ((t = ip6ip6_kernel_tnl_unlink()) == NULL)
++		return -ENODEV;
++	__ip6ip6_tnl_change(t, p);
++
++	atomic_inc(&t->refcnt);
++
++	ip6ip6_tnl_link(t);
++
++	manage_kernel_tnls(NULL);
++out:
++	return atomic_read(&t->refcnt);
++}
++
++/**
++ * ip6ip6_kernel_tnl_del - delete no longer needed kernel tunnel 
++ *   @t: kernel tunnel to be removed from hash
++ *
++ * Description:
++ *   ip6ip6_kernel_tnl_del() removes and deconfigures the tunnel @t
++ *   and places it among the unused kernel devices.
++ * 
++ * Return:
++ *   number of references on success,
++ *   %-EINVAL if p->flags doesn't have %IP6_TNL_F_KERNEL_DEV raised,
++ * 
++ * Note:
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information.
++ **/
++
++int
++ip6ip6_kernel_tnl_del(struct ip6_tnl *t)
++{
++	if (!t)
++		return -ENODEV;
++
++	if (!(t->parms.flags & IP6_TNL_F_KERNEL_DEV))
++		return -EINVAL;
++
++	if (atomic_dec_and_test(&t->refcnt)) {
++		struct ip6_tnl_parm p;
++		ip6ip6_tnl_unlink(t);
++		memset(&p, 0, sizeof (p));
++		p.flags = IP6_TNL_F_KERNEL_DEV;
++
++		__ip6ip6_tnl_change(t, &p);
++
++		ip6ip6_kernel_tnl_link(t);
++
++		manage_kernel_tnls(NULL);
++	}
++	return atomic_read(&t->refcnt);
++}
++
++/**
++ * ip6ip6_tnl_ioctl - configure ipv6 tunnels from userspace 
++ *   @dev: virtual device associated with tunnel
++ *   @ifr: parameters passed from userspace
++ *   @cmd: command to be performed
++ *
++ * Description:
++ *   ip6ip6_tnl_ioctl() is used for managing IPv6 tunnels 
++ *   from userspace. 
++ *
++ *   The possible commands are the following:
++ *     %SIOCGETTUNNEL: get tunnel parameters for device
++ *     %SIOCADDTUNNEL: add tunnel matching given tunnel parameters
++ *     %SIOCCHGTUNNEL: change tunnel parameters to those given
++ *     %SIOCDELTUNNEL: delete tunnel
++ *
++ *   The fallback device "ip6tnl0", created during module 
++ *   initialization, can be used for creating other tunnel devices.
++ *
++ * Return:
++ *   0 on success,
++ *   %-EFAULT if unable to copy data to or from userspace,
++ *   %-EPERM if current process hasn't %CAP_NET_ADMIN set or attempting
++ *   to configure kernel devices from userspace, 
++ *   %-EINVAL if passed tunnel parameters are invalid,
++ *   %-EEXIST if changing a tunnel's parameters would cause a conflict
++ *   %-ENODEV if attempting to change or delete a nonexisting device
++ *
++ * Note:
++ *   See the comments on ip6ip6_kernel_tnl_add() for more information 
++ *   about kernel tunnels.
++ * **/
++
++static int
++ip6ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
++{
++	int err = 0;
++	int create;
++	struct ip6_tnl_parm p;
++	struct ip6_tnl *t = NULL;
++
++	MOD_INC_USE_COUNT;
++
++	switch (cmd) {
++	case SIOCGETTUNNEL:
++		if (dev == &ip6ip6_fb_tnl_dev) {
++			if (copy_from_user(&p,
++					   ifr->ifr_ifru.ifru_data,
++					   sizeof (p))) {
++				err = -EFAULT;
++				break;
++			}
++			if ((err = ip6ip6_tnl_locate(&p, &t, 0)) == -ENODEV)
++				t = (struct ip6_tnl *) dev->priv;
++			else if (err)
++				break;
++		} else
++			t = (struct ip6_tnl *) dev->priv;
++
++		memcpy(&p, &t->parms, sizeof (p));
++		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
++			err = -EFAULT;
++		}
++		break;
++	case SIOCADDTUNNEL:
++	case SIOCCHGTUNNEL:
++		err = -EPERM;
++		create = (cmd == SIOCADDTUNNEL);
++		if (!capable(CAP_NET_ADMIN))
++			break;
++		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
++			err = -EFAULT;
++			break;
++		}
++		if (p.flags & IP6_TNL_F_KERNEL_DEV) {
++			break;
++		}
++		if (!create && dev != &ip6ip6_fb_tnl_dev) {
++			t = (struct ip6_tnl *) dev->priv;
++		}
++		if (!t && (err = ip6ip6_tnl_locate(&p, &t, create))) {
++			break;
++		}
++		if (cmd == SIOCCHGTUNNEL) {
++			if (t->dev != dev) {
++				err = -EEXIST;
++				break;
++			}
++			if (t->parms.flags & IP6_TNL_F_KERNEL_DEV) {
++				err = -EPERM;
++				break;
++			}
++			ip6ip6_tnl_change(t, &p);
++			netdev_state_change(dev);
++		}
++		if (copy_to_user(ifr->ifr_ifru.ifru_data,
++				 &t->parms, sizeof (p))) {
++			err = -EFAULT;
++		} else {
++			err = 0;
++		}
++		break;
++	case SIOCDELTUNNEL:
++		err = -EPERM;
++		if (!capable(CAP_NET_ADMIN))
++			break;
++
++		if (dev == &ip6ip6_fb_tnl_dev) {
++			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data,
++					   sizeof (p))) {
++				err = -EFAULT;
++				break;
++			}
++			err = ip6ip6_tnl_locate(&p, &t, 0);
++			if (err)
++				break;
++			if (t == &ip6ip6_fb_tnl) {
++				err = -EPERM;
++				break;
++			}
++		} else {
++			t = (struct ip6_tnl *) dev->priv;
++		}
++		if (t->parms.flags & IP6_TNL_F_KERNEL_DEV)
++			err = -EPERM;
++		else
++			err = unregister_netdevice(t->dev);
++		break;
++	default:
++		err = -EINVAL;
++	}
++	MOD_DEC_USE_COUNT;
++	return err;
++}
++
++/**
++ * ip6ip6_tnl_get_stats - return the stats for tunnel device 
++ *   @dev: virtual device associated with tunnel
++ *
++ * Return: stats for device
++ **/
++
++static struct net_device_stats *
++ip6ip6_tnl_get_stats(struct net_device *dev)
++{
++	return &(((struct ip6_tnl *) dev->priv)->stat);
++}
++
++/**
++ * ip6ip6_tnl_change_mtu - change mtu manually for tunnel device
++ *   @dev: virtual device associated with tunnel
++ *   @new_mtu: the new mtu
++ *
++ * Return:
++ *   0 on success,
++ *   %-EINVAL if mtu too small
++ **/
++
++static int
++ip6ip6_tnl_change_mtu(struct net_device *dev, int new_mtu)
++{
++	if (new_mtu < IPV6_MIN_MTU) {
++		return -EINVAL;
++	}
++	dev->mtu = new_mtu;
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_dev_init_gen - general initializer for all tunnel devices
++ *   @dev: virtual device associated with tunnel
++ *
++ * Description:
++ *   Set function pointers and initialize the &struct flowi template used
++ *   by the tunnel.
++ **/
++
++static int
++ip6ip6_tnl_dev_init_gen(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++	struct flowi *fl = &t->fl;
++	int err;
++	struct sock *sk;
++
++	if ((err = sock_create(PF_INET6, SOCK_RAW, IPPROTO_IPV6, &t->sock))) {
++		printk(KERN_ERR
++		       "Failed to create IPv6 tunnel socket (err %d).\n", err);
++		return err;
++	}
++	t->sock->inode->i_uid = 0;
++	t->sock->inode->i_gid = 0;
++
++	sk = t->sock->sk;
++	sk->allocation = GFP_ATOMIC;
++	sk->net_pinfo.af_inet6.hop_limit = 254;
++	sk->net_pinfo.af_inet6.mc_loop = 0;
++	sk->prot->unhash(sk);
++
++	memset(fl, 0, sizeof (*fl));
++	fl->proto = IPPROTO_IPV6;
++
++	dev->destructor = ip6ip6_tnl_dev_destructor;
++	dev->uninit = ip6ip6_tnl_dev_uninit;
++	dev->hard_start_xmit = ip6ip6_tnl_xmit;
++	dev->get_stats = ip6ip6_tnl_get_stats;
++	dev->do_ioctl = ip6ip6_tnl_ioctl;
++	dev->change_mtu = ip6ip6_tnl_change_mtu;
++
++	dev->type = ARPHRD_TUNNEL6;
++	dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr);
++	dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr);
++	dev->flags |= IFF_NOARP;
++	dev->iflink = 0;
++	/* Hmm... MAX_ADDR_LEN is 8, so the ipv6 addresses can't be 
++	   copied to dev->dev_addr and dev->broadcast, like the ipv4
++	   addresses were in ipip.c, ip_gre.c and sit.c. */
++	dev->addr_len = 0;
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_dev_init - initializer for all non fallback tunnel devices
++ *   @dev: virtual device associated with tunnel
++ **/
++
++static int
++ip6ip6_tnl_dev_init(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
++	ip6ip6_tnl_dev_init_gen(dev);
++	ip6ip6_tnl_link_config(t);
++	return 0;
++}
++
++#ifdef MODULE
++
++/**
++ * ip6ip6_fb_tnl_open - function called when fallback device opened
++ *   @dev: fallback device
++ *
++ * Return: 0 
++ **/
++
++static int
++ip6ip6_fb_tnl_open(struct net_device *dev)
++{
++	MOD_INC_USE_COUNT;
++	return 0;
++}
++
++/**
++ * ip6ip6_fb_tnl_close - function called when fallback device closed
++ *   @dev: fallback device
++ *
++ * Return: 0 
++ **/
++
++static int
++ip6ip6_fb_tnl_close(struct net_device *dev)
++{
++	MOD_DEC_USE_COUNT;
++	return 0;
++}
++#endif
++
++/**
++ * ip6ip6_fb_tnl_dev_init - initializer for fallback tunnel device
++ *   @dev: fallback device
++ *
++ * Return: 0
++ **/
++
++int __init
++ip6ip6_fb_tnl_dev_init(struct net_device *dev)
++{
++	ip6ip6_tnl_dev_init_gen(dev);
++#ifdef MODULE
++	dev->open = ip6ip6_fb_tnl_open;
++	dev->stop = ip6ip6_fb_tnl_close;
++#endif
++	dev_hold(dev);
++	tnls_wc[0] = &ip6ip6_fb_tnl;
++	return 0;
++}
++
++/**
++ * ip6ip6_tnl_register_hook - add hook for processing of tunneled packets
++ *   @reg: hook function and its parameters
++ * 
++ * Description:
++ *   Add a netfilter like hook function for special handling of tunneled 
++ *   packets. The hook functions are called before encapsulation 
++ *   (%IP6_TNL_PRE_ENCAP) and before decapsulation 
++ *   (%IP6_TNL_PRE_DECAP). The possible return values by the hook 
++ *   functions are %IP6_TNL_DROP, %IP6_TNL_ACCEPT and 
++ *   %IP6_TNL_STOLEN (in case the hook function took care of the packet
++ *   and it doesn't have to be processed any further).
++ **/
++
++void
++ip6ip6_tnl_register_hook(struct ip6_tnl_hook_ops *reg)
++{
++	if (reg->hooknum < IP6_TNL_MAXHOOKS) {
++		struct list_head *i;
++
++		write_lock_bh(&ip6ip6_hook_lock);
++		for (i = hooks[reg->hooknum].next;
++		     i != &hooks[reg->hooknum]; i = i->next) {
++			if (reg->priority <
++			    ((struct ip6_tnl_hook_ops *) i)->priority) {
++				break;
++			}
++		}
++		list_add(&reg->list, i->prev);
++		write_unlock_bh(&ip6ip6_hook_lock);
++	}
++}
++
++/**
++ * ip6ip6_tnl_unregister_hook - remove tunnel hook
++ *   @reg: hook function and its parameters
++ **/
++
++void
++ip6ip6_tnl_unregister_hook(struct ip6_tnl_hook_ops *reg)
++{
++	if (reg->hooknum < IP6_TNL_MAXHOOKS) {
++		write_lock_bh(&ip6ip6_hook_lock);
++		list_del(&reg->list);
++		write_unlock_bh(&ip6ip6_hook_lock);
++	}
++}
++
++
++/* the IPv6 over IPv6 protocol structure */
++static struct inet6_protocol ip6ip6_protocol = {
++	ip6ip6_rcv,		/* IPv6 handler         */
++	ip6ip6_err,		/* IPv6 error control   */
++	NULL,			/* next                 */
++	IPPROTO_IPV6,		/* protocol ID          */
++	0,			/* copy                 */
++	NULL,			/* data                 */
++	"IPv6 over IPv6"	/* name                 */
++};
++
++/**
++ * ip6_tunnel_init - register protocol and reserve needed resources
++ *
++ * Return: 0 on success
++ **/
++
++int __init ip6_tunnel_init(void)
++{
++	int i, err;
++
++	ip6ip6_fb_tnl_dev.priv = (void *) &ip6ip6_fb_tnl;
++
++	for (i = 0; i < IP6_TNL_MAXHOOKS; i++) {
++		INIT_LIST_HEAD(&hooks[i]);
++	}
++	if ((err = register_netdev(&ip6ip6_fb_tnl_dev)))
++		return err;
++
++	inet6_add_protocol(&ip6ip6_protocol);
++	return 0;
++}
++
++/**
++ * ip6_tunnel_cleanup - free resources and unregister protocol
++ **/
++
++void ip6_tunnel_cleanup(void)
++{
++	write_lock_bh(&ip6ip6_kernel_lock);
++	shutdown = 1;
++	write_unlock_bh(&ip6ip6_kernel_lock);
++	flush_scheduled_tasks();
++	manage_kernel_tnls(NULL);
++	inet6_del_protocol(&ip6ip6_protocol);
++	unregister_netdev(&ip6ip6_fb_tnl_dev);
++}
++
++#ifdef MODULE
++module_init(ip6_tunnel_init);
++module_exit(ip6_tunnel_cleanup);
++#endif
++
++#if defined(CONFIG_IPV6_MOBILITY_HA_MODULE) || defined(CONFIG_IPV6_MOBILITY_MN_MODULE)
++EXPORT_SYMBOL(ip6ip6_tnl_register_hook);
++EXPORT_SYMBOL(ip6ip6_tnl_unregister_hook);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_HA_MODULE
++EXPORT_SYMBOL(ip6ip6_tnl_dec_max_kdev_count);
++EXPORT_SYMBOL(ip6ip6_tnl_inc_max_kdev_count);
++EXPORT_SYMBOL(ip6ip6_tnl_dec_min_kdev_count);
++EXPORT_SYMBOL(ip6ip6_tnl_inc_min_kdev_count);
++EXPORT_SYMBOL(ip6ip6_kernel_tnl_add);
++EXPORT_SYMBOL(ip6ip6_kernel_tnl_del);
++EXPORT_SYMBOL(ip6ip6_tnl_lookup);
++#endif
++#ifdef CONFIG_IPV6_MOBILITY_MN_MODULE
++EXPORT_SYMBOL(ip6ip6_tnl_create);
++EXPORT_SYMBOL(ip6ip6_tnl_change);
++#endif
++
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mipglue.c
+@@ -0,0 +1,63 @@
++/*
++ *	Glue for Mobility support integration to IPv6
++ *
++ *	Authors:
++ *	Antti Tuominen		<ajtuomin@cc.hut.fi>	
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/sched.h>
++
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/neighbour.h>
++#include <net/mipglue.h>
++
++extern int ip6_tlvopt_unknown(struct sk_buff *skb, int optoff);
++
++/*  Initialize all zero  */
++struct mipv6_callable_functions mipv6_functions = { NULL };
++
++/* Sets mipv6_functions struct to zero to invalidate all successive
++ * calls to mipv6 functions. Used on module unload. */
++
++void mipv6_invalidate_calls(void)
++{
++	memset(&mipv6_functions, 0, sizeof(mipv6_functions));
++}
++
++
++/* Selects correct handler for tlv encoded destination option. Called
++ * by ip6_parse_tlv. Checks if mipv6 calls are valid before calling. */
++
++int mipv6_handle_dstopt(struct sk_buff *skb, int optoff)
++{
++	int ret;
++
++        switch (skb->nh.raw[optoff]) {
++	case MIPV6_TLV_HOMEADDR: 
++		ret = MIPV6_CALLFUNC(mipv6_handle_homeaddr, 0)(skb, optoff);
++		break;
++	default:
++		/* Should never happen */
++		printk(KERN_ERR __FILE__ ": Invalid destination option code (%d)\n",
++		       skb->nh.raw[optoff]);
++		ret = 1;
++		break;
++	}
++
++	/* If mipv6 handlers are not valid, pass the packet to
++         * ip6_tlvopt_unknown() for correct handling. */
++	if (!ret)
++		return ip6_tlvopt_unknown(skb, optoff);
++
++	return ret;
++}
++
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/Config.in
+@@ -0,0 +1,12 @@
++#
++# Mobile IPv6 Configuration
++#
++dep_tristate '    IPv6: Mobility Support (Correspondent Node)' CONFIG_IPV6_MOBILITY $CONFIG_IPV6
++if [ "$CONFIG_IPV6_IPV6_TUNNEL" != "n" ]; then
++   dep_tristate '      MIPv6: Mobile Node Support' CONFIG_IPV6_MOBILITY_MN $CONFIG_IPV6_MOBILITY
++
++   dep_tristate '      MIPv6: Home Agent Support' CONFIG_IPV6_MOBILITY_HA $CONFIG_IPV6_MOBILITY
++fi
++if [ "$CONFIG_IPV6_MOBILITY" != "n" ]; then
++   bool '      MIPv6: Debug messages' CONFIG_IPV6_MOBILITY_DEBUG
++fi
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/Makefile
+@@ -0,0 +1,35 @@
++#
++# Makefile for the MIPL Mobile IPv6 for Linux.
++#
++# Note! Dependencies are done automagically by 'make dep', which also
++# removes any old dependencies. DON'T put your own dependencies here
++# unless it's something special (ie not a .c file).
++#
++
++
++O_TARGET := mip6_base.o
++
++list-multi := mip6_ha.o mip6_mn.o
++
++obj-y := hashlist.o bcache.o mobhdr_common.o stats.o exthdrs.o \
++	rr_crypto.o hmac.o auth_opt.o mipv6_icmp.o module_cn.o
++
++obj-m := $(O_TARGET)
++
++mip6_ha-objs := halist.o mipv6_icmp_ha.o tunnel_ha.o \
++		ndisc_ha.o ha.o module_ha.o
++
++mip6_mn-objs := mipv6_icmp_mn.o ioctl_mn.o tunnel_mn.o \
++		mdetect.o bul.o multiaccess_ctl.o mobhdr_mn.o mn.o \
++		module_mn.o 
++
++obj-$(CONFIG_IPV6_MOBILITY_HA) += mip6_ha.o
++obj-$(CONFIG_IPV6_MOBILITY_MN) += mip6_mn.o
++
++include $(TOPDIR)/Rules.make
++
++mip6_ha.o: $(mip6_ha-objs)
++	$(LD) -r -o $@ $(mip6_ha-objs)
++
++mip6_mn.o: $(mip6_mn-objs)
++	$(LD) -r -o $@ $(mip6_mn-objs)
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/README
+@@ -0,0 +1,15 @@
++MIPL Mobile IPv6 for Linux
++
++More information at http://www.mipl.mediapoli.com/.
++
++To join MIPL Mobile IPv6 for Linux mailing lists go to:
++
++	http://www.mipl.mediapoli.com/cgi-bin/mailman/listinfo
++
++Or send mail with subject "subscribe" for the general list to:
++
++	mipl-request@list.mipl.mediapoli.com
++
++or for the developer list to:
++
++	mipl-devel-request@list.mail.mediapoli.com
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/auth_opt.c
+@@ -0,0 +1,121 @@
++/*
++ *	MIPv6 Binding Authentication Data Option functions
++ *	
++ *      Authors: 
++ *      Henrik Petander         <lpetande@tml.hut.fi>
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/autoconf.h>
++#include <linux/icmpv6.h>
++#include <net/mipv6.h>
++
++#include "debug.h"
++#include "hmac.h"
++#include "mobhdr.h"
++
++#define DBG_KEY 5
++
++int mipv6_auth_build(struct in6_addr *cn_addr, struct in6_addr *coa, 
++		     __u8 *mh, __u8 *aud_data, __u8 *k_bu)
++{
++	/* First look up the peer from sadb based on his address */ 
++	struct ah_processing ahp;
++
++	/* Don't add any other options or this system is screwed */
++
++	__u8 buf[MAX_HASH_LENGTH];  
++	
++	
++	if (!k_bu) {
++		DEBUG(DBG_ERROR, "k_bu missing, aborting");
++		return -1;
++	}
++	DEBUG(DBG_KEY, "Key for building authenticator:");
++	debug_print_buffer(DBG_KEY, k_bu, HMAC_SHA1_KEY_SIZE);
++
++	if (ah_hmac_sha1_init(&ahp, k_bu,  HMAC_SHA1_KEY_SIZE) < 0) {
++		DEBUG(DBG_ERROR, "Failed to initialize hmac sha1");
++                return -1; 
++        } 
++
++	DEBUG(DBG_KEY, "coa: ");
++	debug_print_buffer(DBG_KEY, coa, 16);
++	DEBUG(DBG_KEY, "cn_addr: ");
++	debug_print_buffer(DBG_KEY, cn_addr, 16);
++	DEBUG(DBG_KEY, "MH contents: ");
++	debug_print_buffer(DBG_KEY, mh, aud_data - mh);
++
++	/* First the common part */
++	ah_hmac_sha1_loop(&ahp, coa, sizeof(struct in6_addr));
++	ah_hmac_sha1_loop(&ahp, cn_addr, sizeof(struct in6_addr));
++	ah_hmac_sha1_loop(&ahp, mh, aud_data - mh);
++	ah_hmac_sha1_result(&ahp, buf);
++
++	memcpy(aud_data, buf,  MIPV6_RR_MAC_LENGTH);
++
++	return 0;
++}
++
++int mipv6_auth_check(struct in6_addr *cn_addr, struct in6_addr *coa,
++		     __u8 *opt, __u8 optlen, 
++		     struct mipv6_mo_bauth_data *aud, __u8 *k_bu)
++{
++	int ret = -1;
++	struct ah_processing ahp;
++	__u8 htarget[MAX_HASH_LENGTH];
++
++	/* Look up peer by home address */ 
++	if (!k_bu) {
++		DEBUG(DBG_ERROR, "k_bu missing, aborting"); 
++		return -1;
++	}
++
++	DEBUG(DBG_KEY, "Key for checking authenticator:");
++	debug_print_buffer(DBG_KEY, k_bu, HMAC_SHA1_KEY_SIZE);
++
++	if (!aud || !coa) {
++		DEBUG(DBG_INFO, "%s is NULL", aud ? "coa" : "aud");
++		goto out;
++	}
++
++	if (aud->length != MIPV6_RR_MAC_LENGTH) {
++		DEBUG(DBG_ERROR,
++			 ": Incorrect authentication option length %d", aud->length); 
++		goto out; 
++	}
++	
++	if (ah_hmac_sha1_init(&ahp, k_bu, HMAC_SHA1_KEY_SIZE) < 0) { 
++                DEBUG(DBG_ERROR,
++			 "internal error in initialization of authentication algorithm");
++		goto out;
++        } 
++	DEBUG(DBG_KEY, "coa: ");
++	debug_print_buffer(DBG_KEY, coa, 16);
++	DEBUG(DBG_KEY, "cn_addr: ");
++	debug_print_buffer(DBG_KEY, cn_addr, 16);
++	DEBUG(DBG_KEY, "MH contents: ");
++	debug_print_buffer(DBG_KEY, opt, (u8*) aud->data - opt);
++
++	ah_hmac_sha1_loop(&ahp, coa, sizeof(struct in6_addr));
++	ah_hmac_sha1_loop(&ahp, cn_addr, sizeof(struct in6_addr));
++
++	/* 
++	 * Process MH + options till the start of the authenticator in
++	 * Auth. data option
++	 */
++	ah_hmac_sha1_loop(&ahp, opt,  (u8 *)aud->data - opt);
++	ah_hmac_sha1_result(&ahp, htarget);
++	if (memcmp(htarget, aud->data, MIPV6_RR_MAC_LENGTH) == 0)
++		ret = 0;
++
++	DEBUG(DBG_ERROR, "returning %d", ret);
++out:	
++	return ret;
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/bcache.c
+@@ -0,0 +1,746 @@
++/*
++ *      Binding Cache
++ *
++ *      Authors:
++ *      Juha Mynttinen            <jmynttin@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++/*
++ *	Changes:
++ *
++ *	Nanno Langstraat	:	Timer code cleaned up, active socket
++ *					test rewritten
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/spinlock.h>
++#include <linux/proc_fs.h>
++#include <linux/ipv6_route.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/tcp.h>
++#include <net/udp.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "bcache.h"
++#include "hashlist.h"
++#include "debug.h"
++#include "mobhdr.h"
++#include "tunnel.h"
++#include "config.h"
++
++#define TIMERDELAY HZ/10
++
++struct mipv6_bcache {
++	struct hashlist *entries;
++	__u32 size;
++	struct timer_list callback_timer;
++};
++
++struct in6_addr_pair {
++	struct in6_addr *a1;
++	struct in6_addr *a2;
++};
++
++static rwlock_t bcache_lock = RW_LOCK_UNLOCKED;
++
++static struct mipv6_bcache bcache;
++
++static int bcache_proc_info(char *buffer, char **start, off_t offset,
++			    int length);
++
++#define MIPV6_BCACHE_HASHSIZE  32
++
++/* Moment of transmission of a BR, in seconds before bcache entry expiry */
++#define BCACHE_BR_SEND_LEAD  3
++
++#define MIPV6_MAX_BRR 3 /* Send 3 BRRs before deleting BC entry */
++#define MIPV6_BRR_RATE HZ /* Send BRRs once per second */
++
++/* 
++ * Internal functions.
++ */
++
++struct cache_entry_iterator_args {
++	struct mipv6_bce **entry;
++};
++
++static int find_first_cache_entry_iterator(void *data, void *args,
++					   unsigned long *lifetime)
++{
++	struct mipv6_bce *entry =
++	    (struct mipv6_bce *) data;
++	struct cache_entry_iterator_args *state =
++	    (struct cache_entry_iterator_args *) args;
++
++	ASSERT(entry != NULL);
++
++	if (entry->type == CACHE_ENTRY) {
++		*(state->entry) = entry;
++		return ITERATOR_STOP;	/* stop iteration */
++	} else {
++		return ITERATOR_CONT;	/* continue iteration */
++	}
++}
++
++
++/* 
++ * Get memory for a new bcache entry.  If bcache is full, a cache
++ * entry may be deleted to get space for a home registration, but not
++ * vice versa.
++ */
++static struct mipv6_bce *mipv6_bce_alloc(__u8 type)
++{
++	struct mipv6_bce *entry;
++	struct cache_entry_iterator_args args;
++
++	DEBUG_FUNC();
++
++	entry = (struct mipv6_bce *)
++		hashlist_alloc(bcache.entries, SLAB_ATOMIC);
++
++	/* Cache replacement policy: always replace the CACHE_ENTRY
++           closest to expiration.  Type HOME_REGISTRATION entry may
++           never be deleted before expiration. */
++	if (entry == NULL) {
++		/* cache full, try to delete a CACHE_ENTRY */
++		args.entry = &entry;
++		hashlist_iterate(bcache.entries, &args,
++				 find_first_cache_entry_iterator);
++		if (entry == NULL)
++			return NULL;
++		hashlist_delete(bcache.entries,
++				(struct hashlist_entry *)entry);
++		entry = (struct mipv6_bce *)
++			hashlist_alloc(bcache.entries, SLAB_ATOMIC);
++	}
++	return entry;
++}
++
++/*
++ * Frees entry's memory allocated with mipv6_bce_alloc
++ */
++static void mipv6_bce_free(struct mipv6_bce *entry)
++{
++	hashlist_free(bcache.entries, (void *) entry);
++}
++
++/*
++ * Removes all expired entries 
++ */
++static void expire(void)
++{
++	struct mipv6_bce *entry;
++	struct br_addrs {
++		struct in6_addr daddr;
++		struct in6_addr saddr;
++		struct br_addrs *next;
++	};
++	struct br_addrs *br_info = NULL;
++
++	DEBUG_FUNC();
++
++	write_lock(&bcache_lock);
++
++	while ((entry = (struct mipv6_bce *)
++		hashlist_get_first(bcache.entries)) != NULL) {
++		struct rt6_info *rt;
++		if (time_after_eq(jiffies, entry->callback_time)) {
++
++			DEBUG(DBG_INFO, "an entry expired");
++
++			if (entry->type & HOME_REGISTRATION) {
++				mip6_fn.proxy_del(&entry->home_addr, entry);
++			}
++			hashlist_delete(bcache.entries, (void *)entry);
++			mipv6_bce_free(entry);
++			entry = NULL;
++		} else if (entry->br_callback_time != 0 &&
++			   time_after_eq(jiffies, entry->br_callback_time) &&
++			   entry->br_count < MIPV6_MAX_BRR &&
++			   (rt = rt6_lookup(&entry->home_addr, &entry->our_addr, 0, 0)) != NULL){
++			/* Do we have a destination cache entry for the home address */
++			if (rt->rt6i_flags & RTF_CACHE) {
++				struct br_addrs *tmp;
++				tmp = br_info;
++				DEBUG(DBG_INFO,
++				      "bcache entry recently used. Sending BR.");
++				/* queue for sending */
++				br_info = kmalloc(sizeof(struct br_addrs),
++						  GFP_ATOMIC);
++				if (br_info) {
++					ipv6_addr_copy(&br_info->saddr,
++						       &entry->our_addr);
++					ipv6_addr_copy(&br_info->daddr,
++						       &entry->home_addr);
++					br_info->next = tmp;
++					entry->last_br = jiffies;
++					entry->br_callback_time = jiffies + MIPV6_BRR_RATE;
++					entry->br_count++;
++				} else {
++					br_info = tmp;
++					DEBUG(DBG_ERROR, "Out of memory");
++				}
++				
++			} else
++				entry->br_callback_time = 0;	
++			dst_release(&rt->u.dst);
++		} else {
++			entry->br_callback_time = 0;
++			break;
++		}
++	}
++	write_unlock(&bcache_lock);
++
++	while (br_info) {
++		struct br_addrs *tmp = br_info->next;
++		if (mipv6_send_brr(&br_info->saddr, &br_info->daddr, NULL) < 0)
++			DEBUG(DBG_WARNING,
++			      "BR send for %x:%x:%x:%x:%x:%x:%x:%x failed",
++			      NIPV6ADDR(&br_info->daddr));
++		kfree(br_info);
++		br_info = tmp;
++	}
++}
++
++static void set_timer(void)
++{
++	struct mipv6_bce *entry;
++	unsigned long callback_time;
++
++	DEBUG_FUNC();
++
++	entry = (struct mipv6_bce *)
++		hashlist_get_first(bcache.entries);
++	if (entry != NULL) {
++		if (entry->br_callback_time > 0 && 
++		    time_after(entry->br_callback_time, jiffies))
++			callback_time = entry->br_callback_time;
++		else if (time_after(entry->callback_time, jiffies))
++			callback_time = entry->callback_time;
++		else {
++			DEBUG(DBG_WARNING, 
++			      "bcache timer attempted to schedule"
++			      " for a historical jiffies count!");
++			callback_time = jiffies + TIMERDELAY;
++		}
++		
++		DEBUG(DBG_INFO, "setting timer to now");
++		mod_timer(&bcache.callback_timer, callback_time);
++	} else {
++		del_timer(&bcache.callback_timer);
++		DEBUG(DBG_INFO, "BC empty, not setting a new timer");
++	}
++}
++
++/* 
++ * The function that is scheduled to do the callback functions. May be
++ * modified e.g to allow Binding Requests, now only calls expire() and
++ * schedules a new timer.
++ */
++static void timer_handler(unsigned long dummy)
++{
++	expire();
++	write_lock(&bcache_lock);
++	set_timer();
++	write_unlock(&bcache_lock);
++}
++
++/*
++ * Interface functions visible to other modules
++ */
++
++/**
++ * mipv6_bcache_add - add Binding Cache entry
++ * @ifindex: interface index
++ * @our_addr: own address
++ * @home_addr_org: MN's home address
++ * @coa: MN's care-of address
++ * @lifetime: lifetime for this binding
++ * @prefix: prefix length
++ * @seq: sequence number
++ * @flags: flags received in BU
++ * @type: type of entry
++ *
++ * Adds an entry for this @home_addr_org in the Binding Cache.  If entry
++ * already exists, old entry is updated.  @type may be %CACHE_ENTRY or
++ * %HOME_REGISTRATION.
++ **/
++int mipv6_bcache_add(int ifindex,
++		     struct in6_addr *our_addr,
++		     struct in6_addr *home_addr,
++		     struct in6_addr *coa,
++		     __u32 lifetime, __u16 seq, __u8 flags, __u8 type)
++{
++	struct mipv6_bce *entry;
++	int update = 0;
++	int create_tunnel = 0;
++	unsigned long now = jiffies;
++	struct in6_addr_pair hashkey;
++	int ret = -1;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	write_lock(&bcache_lock);
++
++	if (type == HOME_REGISTRATION && !(mip6node_cnf.capabilities&CAP_HA))
++		return 0;
++
++	if (unlikely(bcache.entries == NULL)) {
++		ret = -ENOMEM;
++		goto err;
++	}
++
++	if ((entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) != NULL) {
++		/* if an entry for this home_addr exists (with smaller
++		 * seq than the new seq), update it by removing it
++		 * first
++		 */
++		if (!MIPV6_SEQ_GT(seq, entry->seq)) {
++			DEBUG(DBG_INFO, "smaller seq than existing, not updating");
++			goto out;
++		}
++		DEBUG(DBG_INFO, "updating an existing entry");
++		update = 1;
++
++		/* H-flag is already checked in BU handler. */
++		/* XXX: Should we care about the other flags?*/
++		if (flags != entry->flags) {
++			DEBUG(DBG_INFO, "entry/BU flag mismatch");
++		}
++
++		if (type == HOME_REGISTRATION) {
++			create_tunnel = (ipv6_addr_cmp(&entry->coa, coa) ||
++					 entry->ifindex != ifindex);
++		}
++	} else {
++		/* no entry for this home_addr, try to create a new entry */
++		DEBUG(DBG_INFO, "creating a new entry");
++		update = 0;
++
++		entry = mipv6_bce_alloc(type);
++		if (entry == NULL) {
++			DEBUG(DBG_INFO, "cache full, entry not added");
++			goto err;
++		}
++
++		create_tunnel = (type == HOME_REGISTRATION);
++	}
++
++	if (create_tunnel) {
++		if (update)
++			mip6_fn.proxy_del(&entry->home_addr, entry);
++		if (mip6_fn.proxy_create(flags, ifindex, coa, our_addr, home_addr) < 0) {
++			goto err_proxy;
++		}
++	}
++
++	ipv6_addr_copy(&(entry->our_addr), our_addr);
++	ipv6_addr_copy(&(entry->home_addr), home_addr);
++	ipv6_addr_copy(&(entry->coa), coa);
++	entry->ifindex = ifindex;
++	entry->seq = seq;
++	entry->type = type;
++	entry->flags = flags;
++	
++	entry->last_br = 0;
++	entry->destunr_count = 0;
++	entry->callback_time = now + lifetime * HZ;
++	if (entry->type & HOME_REGISTRATION)
++		entry->br_callback_time = 0;
++	else
++		entry->br_callback_time = now +
++			(lifetime - BCACHE_BR_SEND_LEAD) * HZ;
++	
++	if (update) {
++		DEBUG(DBG_INFO, "updating entry : %x", entry);
++		hashlist_reposition(bcache.entries, (void *)entry, 
++				    entry->callback_time);
++	} else {
++		DEBUG(DBG_INFO, "adding entry: %x", entry);
++		if ((hashlist_add(bcache.entries,
++				  &hashkey,
++				  entry->callback_time, entry)) < 0) {
++			
++			DEBUG(DBG_ERROR, "Hash add failed");
++			goto err_hashlist;
++		}
++	}
++	
++	set_timer();
++	
++out:
++	write_unlock(&bcache_lock);
++	return 0;
++
++err_hashlist:
++	if (create_tunnel) {
++		mip6_fn.proxy_del(home_addr, entry);
++	}
++err_proxy:
++	if (update) {
++		hashlist_delete(bcache.entries, (void *)entry);
++	}
++	mipv6_bce_free(entry);
++err:
++	write_unlock(&bcache_lock);
++	return ret;
++}
++
++int mipv6_bcache_icmp_err(struct in6_addr *home_addr,
++			  struct in6_addr *our_addr, 
++			  int destunr_count)
++{
++	struct mipv6_bce *entry;
++	struct in6_addr_pair hashkey;
++
++	int ret = -ENOENT;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	write_lock(&bcache_lock);
++	if (unlikely(bcache.entries == NULL)) {
++		ret = -ENOMEM;
++		goto err;
++	}
++
++	if ((entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) != NULL) {
++		entry->last_destunr = jiffies;
++		entry->destunr_count = destunr_count;
++		ret = 0;
++	}
++err:
++	write_unlock(&bcache_lock);
++	return ret;
++}
++
++
++/**
++ * mipv6_bcache_delete - delete Binding Cache entry
++ * @home_addr: MN's home address
++ * @our_addr: our address
++ * @type: type of entry
++ *
++ * Deletes an entry associated with @home_addr from Binding Cache.
++ * Valid values for @type are %CACHE_ENTRY, %HOME_REGISTRATION and
++ * %ANY_ENTRY.  %ANY_ENTRY deletes any type of entry.
++ **/
++int mipv6_bcache_delete(struct in6_addr *home_addr,
++			struct in6_addr *our_addr, __u8 type)
++{
++	struct mipv6_bce *entry;
++	struct in6_addr_pair hashkey;
++	int err = 0;
++
++	DEBUG_FUNC();
++
++	if (home_addr == NULL || our_addr == NULL) {
++		DEBUG(DBG_INFO, "error in arguments");
++		return -EINVAL;
++	}
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	write_lock(&bcache_lock);
++
++	if (unlikely(bcache.entries == NULL) ||
++	    (entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) == NULL ||
++	    !(entry->type & type)) {
++		DEBUG(DBG_INFO, "No matching entry found");
++		err = -ENOENT;
++		goto out;
++	}
++
++	hashlist_delete(bcache.entries, (void *) entry);
++	mipv6_bce_free(entry);
++
++	set_timer();
++out:
++	write_unlock(&bcache_lock);
++	return err;
++}
++
++/**
++ * mipv6_bcache_exists - check if entry exists
++ * @home_addr: home address to check
++ * @our_addr: our address
++ *
++ * Determines if a binding exists for @home_addr.  Returns type of the
++ * entry or negative if entry does not exist.
++ **/
++int mipv6_bcache_exists(struct in6_addr *home_addr,
++			struct in6_addr *our_addr)
++{
++	struct mipv6_bce *entry;
++	struct in6_addr_pair hashkey;
++	int type = -ENOENT;
++
++	DEBUG_FUNC();
++
++	if (home_addr == NULL || our_addr == NULL)
++		return -EINVAL;
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	read_lock(&bcache_lock);
++	if (likely(bcache.entries != NULL) &&
++	    (entry = (struct mipv6_bce *)
++	     hashlist_get(bcache.entries, &hashkey)) != NULL) {
++		type = entry->type;
++	}
++	read_unlock(&bcache_lock);
++
++	return type;
++}
++
++/**
++ * mipv6_bcache_get - get entry from Binding Cache
++ * @home_addr: home address to search
++ * @our_addr: our address
++ * @entry: pointer to buffer
++ *
++ * Gets a copy of Binding Cache entry for @home_addr. If entry 
++ * exists entry is copied to @entry and zero is returned.  
++ * Otherwise returns negative.
++ **/
++int mipv6_bcache_get(struct in6_addr *home_addr,
++		     struct in6_addr *our_addr,
++		     struct mipv6_bce *entry)
++{
++	struct mipv6_bce *entry2;
++	struct in6_addr_pair hashkey;
++	int ret = -ENOENT;
++
++	DEBUG_FUNC();
++
++	if (home_addr == NULL || our_addr == NULL || entry == NULL)
++		return -EINVAL;
++
++	hashkey.a1 = home_addr;
++	hashkey.a2 = our_addr;
++
++	read_lock_bh(&bcache_lock);
++
++	entry2 = (struct mipv6_bce *)
++		hashlist_get(bcache.entries, &hashkey);
++	if (entry2 != NULL) {
++		memcpy(entry, entry2, sizeof(struct mipv6_bce));
++		ret = 0;
++	}
++	read_unlock_bh(&bcache_lock);
++	return ret;
++}
++
++int mipv6_bcache_iterate(hashlist_iterator_t func, void *args)
++{
++	int ret;
++
++	read_lock_bh(&bcache_lock);
++	ret = hashlist_iterate(bcache.entries, args, func);
++	read_unlock_bh(&bcache_lock);
++
++	return ret;
++}
++
++/*
++ * Proc-filesystem functions
++ */
++
++#define BC_INFO_LEN 80
++
++struct procinfo_iterator_args {
++	char *buffer;
++	int offset;
++	int length;
++	int skip;
++	int len;
++};
++
++static int procinfo_iterator(void *data, void *args, unsigned long *pref)
++{
++	struct procinfo_iterator_args *arg =
++	    (struct procinfo_iterator_args *) args;
++	struct mipv6_bce *entry =
++	    (struct mipv6_bce *) data;
++
++	ASSERT(entry != NULL);
++
++	if (arg->skip < arg->offset / BC_INFO_LEN) {
++		arg->skip++;
++		return ITERATOR_CONT;
++	}
++
++	if (arg->len >= arg->length)
++		return ITERATOR_CONT;
++
++	/* HoA CoA CallbackInSecs Type */
++	arg->len += sprintf(arg->buffer + arg->len,
++			    "%08x%08x%08x%08x %08x%08x%08x%08x %010lu %02d\n",
++			    ntohl(entry->home_addr.s6_addr32[0]),
++			    ntohl(entry->home_addr.s6_addr32[1]),
++			    ntohl(entry->home_addr.s6_addr32[2]),
++			    ntohl(entry->home_addr.s6_addr32[3]),
++			    ntohl(entry->coa.s6_addr32[0]),
++			    ntohl(entry->coa.s6_addr32[1]),
++			    ntohl(entry->coa.s6_addr32[2]),
++			    ntohl(entry->coa.s6_addr32[3]),
++			    ((entry->callback_time) - jiffies) / HZ,
++			    (int) entry->type);
++
++	return ITERATOR_CONT;
++}
++
++ /*
++  * Callback function for proc filesystem.
++  */
++static int bcache_proc_info(char *buffer, char **start, off_t offset,
++			    int length)
++{
++	struct procinfo_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.buffer = buffer;
++	args.offset = offset;
++	args.length = length;
++	args.skip = 0;
++	args.len = 0;
++
++	read_lock_bh(&bcache_lock);
++	hashlist_iterate(bcache.entries, &args, procinfo_iterator);
++	read_unlock_bh(&bcache_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % BC_INFO_LEN;
++
++	args.len -= offset % BC_INFO_LEN;
++
++	if (args.len > length)
++		args.len = length;
++	if (args.len < 0)
++		args.len = 0;
++
++	return args.len;
++}
++
++static int bcache_compare(void *data, void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *) hashkey;
++	struct mipv6_bce *e = (struct mipv6_bce *) data;
++
++	if (ipv6_addr_cmp(&e->home_addr, p->a1) == 0
++	    && ipv6_addr_cmp(&e->our_addr, p->a2) == 0)
++		return 0;
++	else
++		return -1;
++}
++
++static __u32 bcache_hash(void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *) hashkey;
++
++	return p->a1->s6_addr32[0] ^ p->a1->s6_addr32[1] ^
++		p->a2->s6_addr32[2] ^ p->a2->s6_addr32[3];
++}
++
++/* 
++ * Initialization and shutdown functions
++ */
++
++int __init mipv6_bcache_init(__u32 size)
++{
++	if (size < 1) {
++		DEBUG(DBG_ERROR, "Binding cache size must be at least 1");
++		return -EINVAL;
++	}
++	bcache.entries = hashlist_create(MIPV6_BCACHE_HASHSIZE, size,
++					 sizeof(struct mipv6_bce),
++					 "mip6_bcache", NULL, NULL,
++					 bcache_compare, bcache_hash);
++
++	if (bcache.entries == NULL) {
++		DEBUG(DBG_ERROR, "Failed to initialize hashlist");
++		return -ENOMEM;
++	}
++
++	init_timer(&bcache.callback_timer);
++	bcache.callback_timer.data = 0;
++	bcache.callback_timer.function = timer_handler;
++	bcache.size = size;
++
++	proc_net_create("mip6_bcache", 0, bcache_proc_info);
++
++	DEBUG(DBG_INFO, "Binding cache initialized");
++	return 0;
++}
++
++static int 
++bce_cleanup_iterator(void *rawentry, void *args, unsigned long *sortkey)
++{
++	int type = (int) args;
++	struct mipv6_bce *entry = (struct mipv6_bce *) rawentry;
++	if (entry->type == type) {
++		if (entry->type & HOME_REGISTRATION) {
++			if (unlikely(mip6_fn.proxy_del == NULL))
++				DEBUG(DBG_ERROR, "proxy_del unitialized");
++			else
++				mip6_fn.proxy_del(&entry->home_addr, entry);
++		}
++		return ITERATOR_DELETE_ENTRY;
++	}
++	return ITERATOR_CONT;
++
++}
++
++void mipv6_bcache_cleanup(int type)
++{
++	write_lock_bh(&bcache_lock);
++	hashlist_iterate(bcache.entries,(void *) type, bce_cleanup_iterator);
++	write_unlock_bh(&bcache_lock);
++}
++
++int __exit mipv6_bcache_exit(void)
++{
++	struct hashlist *entries;
++
++	DEBUG_FUNC();
++
++	proc_net_remove("mip6_bcache");
++
++	write_lock_bh(&bcache_lock);
++	DEBUG(DBG_INFO, "Stopping the bcache timer");
++	del_timer(&bcache.callback_timer);
++	hashlist_iterate(bcache.entries,(void *)CACHE_ENTRY, 
++			 bce_cleanup_iterator);
++
++	entries = bcache.entries;
++	bcache.entries = NULL;
++	write_unlock_bh(&bcache_lock);
++
++	hashlist_destroy(entries);
++	return 0;
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/bcache.h
+@@ -0,0 +1,72 @@
++/*
++ *      MIPL Mobile IPv6 Binding Cache header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _BCACHE_H
++#define _BCACHE_H
++
++#include <linux/in6.h>
++#include <linux/timer.h>
++#include "hashlist.h"
++
++#define CACHE_ENTRY 1 /* this and HOME_REGISTRATION are the entry types */
++#define HOME_REGISTRATION 2
++#define ANY_ENTRY 3
++
++#define MIPV6_MAX_DESTUNREACH 5 /* Delete CN BCEs after 5 destination unreachables */
++#define MIPV6_DEST_UNR_IVAL  10 /* What is the max interval of destination  
++				   unreacahable error messages for them to be persistent*/
++
++struct mipv6_bce {
++	struct hashlist_entry e;
++	int ifindex;				/* Interface identifier */
++	struct in6_addr our_addr;		/* our address (as seen by the MN) */
++	struct in6_addr home_addr;		/* MN home address */
++	struct in6_addr coa;			/* MN care-of address */
++	unsigned long callback_time;		/* time of expiration     (in jiffies) */
++	unsigned long br_callback_time;		/* time for sending a BR  (in jiffies) */
++	int (*callback_function)(struct mipv6_bce *entry);
++	__u8 type;				/* home registration */
++	__u8 router;				/* mn is router */
++	__u8 flags;				/* flags received in BU */
++	__u16 seq;				/* sequence number */
++	unsigned long last_br;			/* time when last BR sent */
++	unsigned long last_destunr;             /* time when last ICMP destination unreachable received */
++	int br_count;				/* How many BRRs have sent */
++	int destunr_count;                      /* Number of destination unreachables received */   
++};
++
++int mipv6_bcache_add(int ifindex, struct in6_addr *our_addr, 
++		     struct in6_addr *home_addr, struct in6_addr *coa,
++		     __u32 lifetime, __u16 seq, __u8 flags, __u8 type);
++
++int mipv6_bcache_icmp_err(struct in6_addr *home_addr,
++			  struct in6_addr *our_addr, 
++			  int destunr_count);
++
++int mipv6_bcache_delete(struct in6_addr *home_addr, struct in6_addr *our_addr,
++			__u8 type);
++
++int mipv6_bcache_exists(struct in6_addr *home_addr,
++			struct in6_addr *our_addr);
++
++int mipv6_bcache_get(struct in6_addr *home_addr,
++		     struct in6_addr *our_addr,
++		     struct mipv6_bce *entry);
++
++int mipv6_bcache_iterate(int (*func)(void *, void *, unsigned long *), void *args);
++
++void mipv6_bcache_cleanup(int type);
++
++int mipv6_bcache_init(__u32 size);
++
++int mipv6_bcache_exit(void);
++
++#endif /* _BCACHE_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/bul.c
+@@ -0,0 +1,634 @@
++/*
++ *      Binding update list
++ *
++ *      Authors:
++ *      Juha Mynttinen            <jmynttin@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++/*
++ *	Changes:
++ *
++ *	Nanno Langstraat	:	Timer code cleaned up
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/spinlock.h>
++#include <net/ipv6.h>
++#include <net/mipv6.h>
++#include <linux/proc_fs.h>
++
++#include "bul.h"
++#include "debug.h"
++#include "hashlist.h"
++#include "tunnel_mn.h"
++#include "mobhdr.h"
++
++#define MIPV6_BUL_HASHSIZE 32
++
++rwlock_t bul_lock = RW_LOCK_UNLOCKED;
++
++struct mipv6_bul {
++	struct hashlist *entries;
++	struct timer_list callback_timer;
++};
++
++static struct mipv6_bul bul;
++
++struct in6_addr_pair {
++	struct in6_addr *a1;
++	struct in6_addr *a2;
++};
++
++/**********************************************************************
++ *
++ * Private functions
++ *
++ **********************************************************************/
++
++static int bul_compare(void *data, void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *)hashkey;
++	struct mipv6_bul_entry *e = (struct mipv6_bul_entry *)data;
++
++	if (ipv6_addr_cmp(&e->cn_addr, p->a1) == 0
++	    && ipv6_addr_cmp(&e->home_addr, p->a2) == 0)
++		return 0;
++	else
++		return -1;
++}
++
++struct test_keys {
++	struct in6_addr *addr;
++	u8 *cookie;
++};
++
++static int bul_compare_cookie(void *data, void *keys)
++{
++	struct test_keys *p = (struct test_keys *)keys;
++	struct mipv6_bul_entry *e = (struct mipv6_bul_entry *)data;
++
++	if (ipv6_addr_cmp(&e->cn_addr, p->addr) == 0 && e->rr
++	    && memcmp(&e->rr->cot_cookie, p->cookie, 8) == 0)
++		return 0;
++	else
++		return -1;
++}
++
++static u32 bul_hash(void *hashkey)
++{
++	struct in6_addr_pair *p = (struct in6_addr_pair *)hashkey;
++	
++	return p->a1->s6_addr32[0] ^
++		p->a1->s6_addr32[1] ^
++		p->a1->s6_addr32[2] ^
++		p->a1->s6_addr32[3];
++}
++
++static int bul_proc_info(char *buffer, char **start, off_t offset,
++			    int length);
++
++static struct mipv6_bul_entry *mipv6_bul_get_entry(void)
++{
++	DEBUG_FUNC();
++	return ((struct mipv6_bul_entry *) 
++		hashlist_alloc(bul.entries, SLAB_ATOMIC));
++}
++
++static void mipv6_bul_entry_free(struct mipv6_bul_entry *entry)
++{
++	DEBUG_FUNC();		
++
++	if (entry->rr) {
++		if (entry->rr->kbu)
++			kfree(entry->rr->kbu);
++		kfree(entry->rr);
++	}
++	if (entry->ops)
++		kfree(entry->ops);
++	hashlist_free(bul.entries, (void *)entry);
++}
++
++static __inline__ int del_bul_entry_tnl(struct mipv6_bul_entry *entry) 
++{
++	if (entry->flags & MIPV6_BU_F_HOME) {
++		return mipv6_mv_tnl_to_ha(&entry->cn_addr, 
++                                          &entry->coa,
++                                          &entry->home_addr);
++	}
++	return 0;
++}
++
++static void timer_update(void)
++{
++	struct mipv6_bul_entry *entry;
++
++	DEBUG_FUNC();
++
++	entry = hashlist_get_first(bul.entries);
++
++	while (entry && time_after_eq(jiffies, entry->callback_time)) {
++		if (time_after_eq(jiffies, entry->expire) ||
++		    entry->callback(entry) != 0) {
++			/*
++			 * Either the entry has expired, or the callback
++			 * indicated that it should be deleted.
++			 */
++			hashlist_delete(bul.entries, (void *)entry);
++			
++			del_bul_entry_tnl(entry);
++			mipv6_bul_entry_free(entry);
++			DEBUG(DBG_INFO, "Entry deleted (was expired) from "
++			      "binding update list");
++		} else {
++			/* move entry to its right place in the hashlist */
++			DEBUG(DBG_INFO, "Rescheduling");
++			hashlist_reposition(bul.entries, (void *)entry,
++					    entry->callback_time);
++		}
++		entry = (struct mipv6_bul_entry *)
++			hashlist_get_first(bul.entries);
++	}
++
++	if (entry == NULL) {
++		DEBUG(DBG_INFO, "bul empty, not setting a new timer");
++		del_timer(&bul.callback_timer);
++	} else {
++		mod_timer(&bul.callback_timer, entry->callback_time);
++	}
++}
++
++static void timer_handler(unsigned long dummy)
++{
++	DEBUG_FUNC();
++
++	write_lock(&bul_lock);
++	timer_update();
++	write_unlock(&bul_lock);
++}
++
++/**********************************************************************
++ *
++ * Public interface functions
++ *
++ **********************************************************************/
++
++/**
++ * mipv6_bul_iterate - apply interator function to all entries
++ * @func: function to apply
++ * @args: extra arguments for iterator
++ *
++ * Applies @func for each entry in Binding Update List.  Extra
++ * arguments given in @args are also passed to the iterator function.
++ * Caller must hold @bul_lock.
++ **/
++int mipv6_bul_iterate(hashlist_iterator_t func, void *args)
++{
++	DEBUG_FUNC();
++
++	return hashlist_iterate(bul.entries, args, func);
++}
++
++/**
++ * mipv6_bul_exists - check if Binding Update List entry exists
++ * @cn: address to check
++ *
++ * Checks if Binding Update List has an entry for @cn.  Returns true
++ * if entry exists, false otherwise. Caller may not hold @bul_lock.
++ **/
++int mipv6_bul_exists(struct in6_addr *cn, struct in6_addr *haddr)
++{
++	int exists;
++	struct in6_addr_pair hashkey;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = cn;
++	hashkey.a2 = haddr;
++	
++	read_lock_bh(&bul_lock);
++
++	if (unlikely(bul.entries == NULL))
++		exists = 0;
++	else
++		exists = (hashlist_get(bul.entries, &hashkey) != NULL);
++
++	read_unlock_bh(&bul_lock);
++	return exists;
++}
++
++/**
++ * mipv6_bul_get - get Binding Update List entry
++ * @cn_addr: CN address to search
++ * @home_addr: home address to search
++ *
++ * Returns Binding Update List entry for @cn_addr if it exists.
++ * Otherwise returns %NULL.  Caller must hold @bul_lock.
++ **/
++struct mipv6_bul_entry *mipv6_bul_get(struct in6_addr *cn_addr, 
++				      struct in6_addr *home_addr)
++{
++	struct mipv6_bul_entry *entry;
++	struct in6_addr_pair hashkey;
++	
++	DEBUG_FUNC();
++
++	if (unlikely(bul.entries == NULL)) {
++		return NULL;
++	}
++	hashkey.a1 = cn_addr;
++	hashkey.a2 = home_addr;
++
++	entry = (struct mipv6_bul_entry *) 
++		hashlist_get(bul.entries, &hashkey);
++		
++	return entry;
++}
++
++struct mipv6_bul_entry *mipv6_bul_get_by_ccookie(
++	struct in6_addr *cn_addr, u8 *cookie)
++{
++	struct test_keys key;
++
++	DEBUG_FUNC();
++
++	if (unlikely(bul.entries == NULL))
++		return NULL;
++	key.addr = cn_addr;
++	key.cookie = cookie;
++
++	return (struct mipv6_bul_entry *) 
++		hashlist_get_ex(bul.entries, &key,
++				bul_compare_cookie);
++}
++
++/**
++ * mipv6_bul_reschedule - reschedule Binding Update List entry
++ * @entry: entry to reschedule
++ *
++ * Reschedules a Binding Update List entry.  Must be called after
++ * modifying entry lifetime.  Caller must hold @bul_lock (write).
++ **/
++void mipv6_bul_reschedule(struct mipv6_bul_entry *entry)
++{
++	DEBUG_FUNC();
++
++	hashlist_reposition(bul.entries,
++			    (void *)entry,
++			    entry->callback_time);
++	timer_update();
++}
++
++/**
++ * mipv6_bul_add - add binding update to Binding Update List
++ * @cn_addr: IPv6 address where BU was sent
++ * @home_addr: Home address for this binding
++ * @coa: Care-of address for this binding
++ * @lifetime: expiration time of the binding in seconds
++ * @seq: sequence number of the BU
++ * @flags: %MIPV6_BU_F_* flags
++ * @callback: callback function called on expiration
++ * @callback_time: expiration time for callback
++ * @state: binding send state
++ * @delay: retransmission delay
++ * @maxdelay: retransmission maximum delay
++ * @ops: Mobility header options for BU
++ * @rr: Return routability information
++ *
++ * Adds a binding update sent to @cn_addr for @home_addr to the
++ * Binding Update List.  If entry already exists, it is updated.
++ * Entry is set to expire in @lifetime seconds.  Entry has a callback
++ * function @callback that is called at @callback_time.  Entry @state
++ * controls resending of this binding update and it can be set to
++ * %ACK_OK, %RESEND_EXP or %ACK_ERROR.  Returns a pointer to the newly
++ * created or updated entry.  Caller must hold @bul_lock (write).
++ **/
++struct mipv6_bul_entry *mipv6_bul_add(
++	struct in6_addr *cn_addr, struct in6_addr *home_addr,
++	struct in6_addr *coa, 
++	__u32 lifetime,	__u16 seq, __u8 flags,
++	int (*callback)(struct mipv6_bul_entry *entry),
++	__u32 callback_time, 
++	__u8 state, __u32 delay, __u32 maxdelay,
++	struct mipv6_mh_opt *ops, 
++	struct mipv6_rr_info *rr)
++{
++	struct mipv6_bul_entry *entry;
++	int update = 0;
++	struct in6_addr_pair hashkey;
++
++	DEBUG_FUNC();
++
++	if (unlikely(bul.entries == NULL))
++		return NULL;
++
++	if (cn_addr == NULL || home_addr == NULL || coa == NULL || 
++	    lifetime < 0 || callback == NULL || callback_time < 0 || 
++	    (state != ACK_OK && state != RESEND_EXP && state != ACK_ERROR) ||
++	    delay < 0 || maxdelay < 0) {
++		DEBUG(DBG_ERROR, "invalid arguments");
++		return NULL;
++	}
++	DEBUG(DBG_INFO, "cn_addr: %x:%x:%x:%x:%x:%x:%x:%x, "
++	      "home_addr: %x:%x:%x:%x:%x:%x:%x:%x"
++	      "coaddr: %x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(cn_addr), 
++	       NIPV6ADDR(home_addr), NIPV6ADDR(coa));
++	hashkey.a1 = cn_addr;
++	hashkey.a2 = home_addr;
++	
++	/* 
++	 * decide whether to add a new entry or update existing, also
++	 * check if there's room for a new entry when adding a new
++	 * entry (latter is handled by mipv6_bul_get_entry() 
++	 */
++	if ((entry = (struct mipv6_bul_entry *)
++	     hashlist_get(bul.entries, &hashkey)) != NULL) {
++		/* if an entry for this cn_addr exists (with smaller
++		 * seq than the new entry's seq), update it */
++		
++		if (MIPV6_SEQ_GT(seq, entry->seq)) {
++			DEBUG(DBG_INFO, "updating an existing entry");
++			update = 1;
++		} else {
++			DEBUG(DBG_INFO, "smaller seq than existing, not updating");
++			return NULL;
++		}
++	} else {
++		entry = mipv6_bul_get_entry();
++		if (entry == NULL) {
++			DEBUG(DBG_WARNING, "binding update list full, can't add!!!");
++			return NULL;
++		}
++		memset(entry, 0, sizeof(*entry));
++		/* First BU send happens here, save count in the entry */
++		entry->consecutive_sends = 1;
++	}
++
++	if (!update) {
++		ipv6_addr_copy(&(entry->cn_addr), cn_addr);
++		ipv6_addr_copy(&(entry->home_addr), home_addr);
++		entry->ops = ops;
++	}
++	/* Add Return Routability info to bul entry */
++	if (rr) {
++		if(entry->rr)
++			kfree(entry->rr); 
++		entry->rr = rr;
++	}
++
++	ipv6_addr_copy(&(entry->coa), coa);
++	entry->lifetime = lifetime;
++	if (lifetime)
++		entry->expire = jiffies + lifetime * HZ;
++	else if (flags & MIPV6_BU_F_ACK)
++		entry->expire = jiffies + HOME_RESEND_EXPIRE * HZ;
++	entry->seq = seq;
++	entry->flags = flags;
++	entry->lastsend = jiffies; /* current time = last use of the entry */
++	entry->state = state;
++	entry->delay = delay;
++	entry->maxdelay = maxdelay;
++	entry->callback_time = jiffies + callback_time * HZ;
++	entry->callback = callback;
++
++	if (flags & MIPV6_BU_F_HOME && 
++	    mipv6_mv_tnl_to_ha(cn_addr, coa, home_addr)) {
++		DEBUG(DBG_ERROR, "reconfiguration of the tunnel failed");
++	}
++	if (update) {
++		DEBUG(DBG_INFO, "updating entry: %x", entry);
++		hashlist_reposition(bul.entries, (void *)entry,
++				    entry->callback_time);
++	} else {
++		DEBUG(DBG_INFO, "adding entry: %x", entry);
++
++		hashkey.a1 = &entry->cn_addr;
++		hashkey.a2 = &entry->home_addr;
++
++		if ((hashlist_add(bul.entries, &hashkey,
++				  entry->callback_time,
++				  entry)) < 0) {
++			DEBUG(DBG_ERROR, "Hash add failed");
++			mipv6_bul_entry_free(entry);			
++			return NULL;
++		}
++	}
++	timer_update();	
++
++	return entry;
++}
++
++/**
++ * mipv6_bul_delete - delete Binding Update List entry
++ * @cn_addr: address for entry to delete
++ *
++ * Deletes the entry for @cn_addr from the Binding Update List.
++ * Returns zero if entry was deleted succesfully, otherwise returns
++ * negative.  Caller may not hold @bul_lock.
++ **/
++int mipv6_bul_delete(struct in6_addr *cn_addr, struct in6_addr *home_addr)
++{
++	struct mipv6_bul_entry *entry;
++	struct in6_addr_pair hashkey;
++
++	DEBUG_FUNC();
++
++	hashkey.a1 = cn_addr;
++	hashkey.a2 = home_addr;
++
++	write_lock(&bul_lock);
++
++	if (unlikely(bul.entries == NULL) ||  
++	    (entry = (struct mipv6_bul_entry *)
++	     hashlist_get(bul.entries, &hashkey)) == NULL) {
++		write_unlock(&bul_lock);
++		DEBUG(DBG_INFO, "No such entry");
++		return -ENOENT;
++	}
++
++	hashlist_delete(bul.entries, (void *)entry);
++
++	del_bul_entry_tnl(entry);
++
++	mipv6_bul_entry_free(entry);
++	timer_update();
++	write_unlock(&bul_lock);
++
++	DEBUG(DBG_INFO, "Binding update list entry deleted");
++
++	return 0;
++}
++
++/**********************************************************************
++ *
++ * Proc interface functions
++ *
++ **********************************************************************/
++
++#define BUL_INFO_LEN 152
++
++struct procinfo_iterator_args {
++	char *buffer;
++	int offset;
++	int length;
++	int skip;
++	int len;
++};
++
++static int procinfo_iterator(void *data, void *args,
++			     unsigned long *sortkey)
++{
++	struct procinfo_iterator_args *arg =
++		(struct procinfo_iterator_args *)args;
++	struct mipv6_bul_entry *entry =
++		(struct mipv6_bul_entry *)data;
++	unsigned long callback_seconds;
++
++	DEBUG_FUNC();
++
++	if (entry == NULL) return ITERATOR_ERR;
++
++	if (time_after(jiffies, entry->callback_time))
++		callback_seconds = 0;
++	else
++		callback_seconds = (entry->callback_time - jiffies) / HZ;
++
++	if (arg->skip < arg->offset / BUL_INFO_LEN) {
++		arg->skip++;
++		return ITERATOR_CONT;
++	}
++
++	if (arg->len >= arg->length)
++		return ITERATOR_CONT;
++
++	/* CN HoA CoA ExpInSecs SeqNum State Delay MaxDelay CallbackInSecs */
++	arg->len += sprintf(arg->buffer + arg->len,
++			    "%08x%08x%08x%08x %08x%08x%08x%08x %08x%08x%08x%08x\n"
++			    "%010lu %05d %02d %010d %010d %010lu\n",
++			    ntohl(entry->cn_addr.s6_addr32[0]),
++			    ntohl(entry->cn_addr.s6_addr32[1]),
++			    ntohl(entry->cn_addr.s6_addr32[2]),
++			    ntohl(entry->cn_addr.s6_addr32[3]),
++			    ntohl(entry->home_addr.s6_addr32[0]),
++			    ntohl(entry->home_addr.s6_addr32[1]),
++			    ntohl(entry->home_addr.s6_addr32[2]),
++			    ntohl(entry->home_addr.s6_addr32[3]),
++			    ntohl(entry->coa.s6_addr32[0]),
++			    ntohl(entry->coa.s6_addr32[1]),
++			    ntohl(entry->coa.s6_addr32[2]),
++			    ntohl(entry->coa.s6_addr32[3]),
++			    (entry->expire - jiffies) / HZ,
++			    entry->seq, entry->state, entry->delay, 
++			    entry->maxdelay, callback_seconds);
++
++	return ITERATOR_CONT;
++}
++
++
++/*
++ * Callback function for proc filesystem.
++ */
++static int bul_proc_info(char *buffer, char **start, off_t offset,
++                            int length)
++{
++	struct procinfo_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.buffer = buffer;
++	args.offset = offset;
++	args.length = length;
++	args.skip = 0;
++	args.len = 0;
++
++	read_lock_bh(&bul_lock);
++	hashlist_iterate(bul.entries, &args, procinfo_iterator);
++	read_unlock_bh(&bul_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % BUL_INFO_LEN;
++
++	args.len -= offset % BUL_INFO_LEN;
++
++	if (args.len > length)
++		args.len = length;
++	if (args.len < 0)
++		args.len = 0;
++	
++	return args.len;
++}
++
++/**********************************************************************
++ *
++ * Code module init/fini functions
++ *
++ **********************************************************************/
++
++int __init mipv6_bul_init(__u32 size)
++{
++	DEBUG_FUNC();
++
++	if (size < 1) {
++		DEBUG(DBG_CRITICAL, 
++		      "Binding update list size must be at least 1");
++		return -EINVAL;
++	}
++	bul.entries = hashlist_create(MIPV6_BUL_HASHSIZE, size, 
++				       sizeof(struct mipv6_bul_entry),
++				       "mip6_bul", NULL, NULL,
++				       bul_compare, bul_hash);
++
++	if (bul.entries == NULL) {
++		DEBUG(DBG_CRITICAL, "Couldn't allocate memory for "
++		      "hashlist when creating a binding update list");
++		return -ENOMEM;
++	}
++	init_timer(&bul.callback_timer);
++	bul.callback_timer.data = 0;
++	bul.callback_timer.function = timer_handler;
++	proc_net_create("mip6_bul", 0, bul_proc_info);
++	DEBUG(DBG_INFO, "Binding update list initialized");
++	return 0;
++}
++
++void __exit mipv6_bul_exit()
++{
++	struct mipv6_bul_entry *entry;
++	struct hashlist *entries;
++
++	DEBUG_FUNC();
++
++	proc_net_remove("mip6_bul");
++
++	write_lock_bh(&bul_lock);
++
++	DEBUG(DBG_INFO, "Stopping the bul timer");
++	del_timer(&bul.callback_timer);
++
++	while ((entry = (struct mipv6_bul_entry *) 
++		hashlist_get_first(bul.entries)) != NULL) {
++		hashlist_delete(bul.entries, (void *)entry);
++		
++		del_bul_entry_tnl(entry);
++		
++		mipv6_bul_entry_free(entry);
++	}
++	entries = bul.entries;
++	bul.entries = NULL;
++	write_unlock_bh(&bul_lock); 
++
++	hashlist_destroy(entries);
++
++	DEBUG(DBG_INFO, "binding update list destroyed");
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/bul.h
+@@ -0,0 +1,91 @@
++/*
++ *      MIPL Mobile IPv6 Binding Update List header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _BUL_H
++#define _BUL_H
++
++#include "hashlist.h"
++
++#define ACK_OK          0x01
++#define RESEND_EXP      0x02
++#define ACK_ERROR       0x04
++
++#define HOME_RESEND_EXPIRE 3600
++#define MIPV6_COOKIE_LEN 8
++struct mipv6_rr_info {
++	/* RR information */
++	u16 rr_state;                /* State of the RR */
++	u16 rr_flags;                /* Flags for the RR */
++	u8 hot_cookie[MIPV6_COOKIE_LEN];    /* HoT Cookie */
++	u8 cot_cookie[MIPV6_COOKIE_LEN];    /* CoT Cookie */
++	u8 home_cookie[MIPV6_COOKIE_LEN];   /* Home Cookie */
++	u8 careof_cookie[MIPV6_COOKIE_LEN]; /* Careof Cookie */
++	u32 lastsend_hoti;	      /* When HoTI was last sent (jiffies) */
++	u32 lastsend_coti;            /* When CoTI was last sent (jiffies) */
++	u32 home_time;	              /* when Care-of cookie was received */
++	u32 careof_time;	      /* when Home cookie was received */
++	int home_nonce_index;         /* Home cookie nonce index */
++	int careof_nonce_index;       /* Care-of cookie nonce index */
++	u8 *kbu;                      /* Binding authentication key */
++};
++struct mipv6_bul_entry {
++	struct hashlist_entry e;
++	struct in6_addr cn_addr;	/* CN to which BU was sent */
++	struct in6_addr home_addr;	/* home address of this binding */
++	struct in6_addr coa;		/* care-of address of the sent BU */
++
++	unsigned long expire;		/* entry's expiration time (jiffies) */ 
++	__u32 lifetime;			/* lifetime sent in this BU */
++	__u32 lastsend;			/* last time when BU sent (jiffies) */
++	__u32 consecutive_sends;	/* Number of consecutive BU's sent */
++	__u16 seq;			/* sequence number of the latest BU */
++	__u8 flags;			/* BU send flags */
++	__u8 state;			/* resend state */
++	__u32 initdelay;		/* initial ack wait */
++	__u32 delay;			/* current ack wait */
++	__u32 maxdelay;			/* maximum ack wait */
++
++	struct mipv6_rr_info *rr;
++	struct mipv6_mh_opt *ops;	/* saved option values */
++
++	unsigned long callback_time;
++	int (*callback)(struct mipv6_bul_entry *entry);
++};
++
++extern rwlock_t bul_lock;
++
++int mipv6_bul_init(__u32 size);
++
++void mipv6_bul_exit(void);
++
++struct mipv6_bul_entry *mipv6_bul_add(
++	struct in6_addr *cn_addr, struct in6_addr *home_addr,
++	struct in6_addr *coa, __u32 lifetime, __u16 seq, __u8 flags,
++	int (*callback)(struct mipv6_bul_entry *entry), __u32 callback_time,
++	__u8 state, __u32 delay, __u32 maxdelay, struct mipv6_mh_opt *ops,
++	struct mipv6_rr_info *rr);
++
++int mipv6_bul_delete(struct in6_addr *cn_addr, struct in6_addr *home_addr);
++
++int mipv6_bul_exists(struct in6_addr *cnaddr, struct in6_addr *home_addr);
++
++struct mipv6_bul_entry *mipv6_bul_get(struct in6_addr *cnaddr,
++				      struct in6_addr *home_addr);
++struct mipv6_bul_entry *mipv6_bul_get_by_ccookie(struct in6_addr *cn_addr,
++						 u8 *cookie);
++
++int bul_entry_expired(struct mipv6_bul_entry *bulentry);
++
++void mipv6_bul_reschedule(struct mipv6_bul_entry *entry);
++
++int mipv6_bul_iterate(int (*func)(void *, void *, unsigned long *), void *args);
++
++#endif /* BUL_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/config.h
+@@ -0,0 +1,72 @@
++/*
++ * Configuration parameters
++ *
++ * $Id$
++ */
++
++#define MIPV6VERSION "D24"
++#define MIPLVERSION "v1.0"
++
++#define CAP_CN	0x01
++#define CAP_HA	0x02
++#define CAP_MN	0x04
++
++struct mip6_conf {
++	int capabilities;
++	int debug_level;
++	int accept_ret_rout;
++	int max_rtr_reachable_time;
++	int eager_cell_switching;
++	int max_num_tunnels;
++	int min_num_tunnels;
++	int binding_refresh_advice;
++	int bu_lladdr;
++	int bu_keymgm;
++	int bu_cn_ack;
++};
++
++extern struct mip6_conf mip6node_cnf;
++
++struct mipv6_bce;
++
++struct mip6_func {
++	void (*bce_home_add) (int ifindex, struct in6_addr *daddr, 
++			      struct in6_addr *haddr, struct in6_addr *coa,
++			      struct in6_addr *rep_coa, __u32 lifetime, 
++			      __u16 sequence, __u8 flags, __u8 *k_bu);
++	void (*bce_cache_add) (int ifindex, struct in6_addr *daddr,
++			       struct in6_addr *haddr, struct in6_addr *coa,
++			       struct in6_addr *rep_coa, __u32 lifetime,
++			       __u16 sequence, __u8 flags, __u8 *k_bu);
++	void (*bce_home_del) (struct in6_addr *daddr, struct in6_addr *haddr, 
++			      struct in6_addr *coa, struct in6_addr *rep_coa,
++			      __u16 sequence, __u8 flags,
++			      __u8 *k_bu);
++	void (*bce_cache_del) (struct in6_addr *daddr, struct in6_addr *haddr, 
++			       struct in6_addr *coa, struct in6_addr *rep_coa,
++			       __u16 sequence, __u8 flags,
++			       __u8 *k_bu);
++	
++	int (*bce_tnl_rt_add) (struct in6_addr *coa, 
++			       struct in6_addr *ha_addr, 
++			       struct in6_addr *home_addr);
++
++	void (*bce_tnl_rt_del) (struct in6_addr *coa, 
++				struct in6_addr *ha_addr, 
++				struct in6_addr *home_addr);
++
++	void (*proxy_del) (struct in6_addr *home_addr, struct mipv6_bce *entry);
++	int (*proxy_create) (int flags, int ifindex, struct in6_addr *coa,
++			     struct in6_addr *our_addr, struct in6_addr *home_addr);
++
++	int (*icmpv6_dhaad_rep_rcv) (struct sk_buff *skb);
++	int (*icmpv6_dhaad_req_rcv) (struct sk_buff *skb);
++	int (*icmpv6_pfxadv_rcv) (struct sk_buff *skb);
++	int (*icmpv6_pfxsol_rcv) (struct sk_buff *skb);
++	int (*icmpv6_paramprob_rcv) (struct sk_buff *skb);
++
++	int (*mn_use_hao) (struct in6_addr *daddr, struct in6_addr *saddr);
++	void (*mn_check_tunneled_packet) (struct sk_buff *skb);
++};
++
++extern struct mip6_func mip6_fn;
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/debug.h
+@@ -0,0 +1,112 @@
++/*
++ *      MIPL Mobile IPv6 Debugging macros and functions
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _DEBUG_H
++#define _DEBUG_H
++
++#include <linux/autoconf.h>
++
++/* priorities for different debug conditions */
++
++#define DBG_CRITICAL   0 /* unrecoverable error                     */
++#define DBG_ERROR      1 /* error (recoverable)                     */
++#define DBG_WARNING    2 /* unusual situation but not a real error  */
++#define DBG_INFO       3 /* generally useful information            */
++#define DBG_EXTRA      4 /* extra information                       */
++#define DBG_FUNC_ENTRY 6 /* use to indicate function entry and exit */
++#define DBG_DATADUMP   7 /* packet dumps, etc. lots of flood        */
++
++/**
++ * NIPV6ADDR - macro for IPv6 addresses
++ * @addr: Network byte order IPv6 address
++ *
++ * Macro for printing IPv6 addresses.  Used in conjunction with
++ * printk() or derivatives (such as DEBUG macro).
++ **/
++#define NIPV6ADDR(addr) \
++        ntohs(((u16 *)addr)[0]), \
++        ntohs(((u16 *)addr)[1]), \
++        ntohs(((u16 *)addr)[2]), \
++        ntohs(((u16 *)addr)[3]), \
++        ntohs(((u16 *)addr)[4]), \
++        ntohs(((u16 *)addr)[5]), \
++        ntohs(((u16 *)addr)[6]), \
++        ntohs(((u16 *)addr)[7])
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++extern int mipv6_debug;
++
++/**
++ * debug_print - print debug message
++ * @debug_level: message priority
++ * @fname: calling function's name
++ * @fmt: printf-style formatting string
++ *
++ * Prints a debug message to system log if @debug_level is less or
++ * equal to @mipv6_debug.  Should always be called using DEBUG()
++ * macro, not directly.
++ **/
++static void debug_print(int debug_level, const char *fname, const char* fmt, ...)
++{
++	char s[1024];
++	va_list args;
++ 
++	if (mipv6_debug < debug_level)
++		return;
++ 
++	va_start(args, fmt);
++	vsprintf(s, fmt, args);
++	printk("mip6[%s]: %s\n", fname, s);
++	va_end(args);
++}
++
++/**
++ * debug_print_buffer - print arbitrary buffer to system log
++ * @debug_level: message priority
++ * @data: pointer to buffer
++ * @len: number of bytes to print
++ *
++ * Prints @len bytes from buffer @data to system log.  @debug_level
++ * tells on which debug level message gets printed.  For
++ * debug_print_buffer() priority %DBG_DATADUMP should be used.
++ **/
++#define debug_print_buffer(debug_level,data,len) { \
++	if (mipv6_debug >= debug_level) { \
++	int i; \
++	for (i=0; i<len; i++) { \
++		if (i%16 == 0) printk("\n%04x: ", i); \
++		printk("%02x ", ((unsigned char *)data)[i]); \
++	} \
++	printk("\n\n"); \
++	} \
++}
++
++#define DEBUG(x,y,z...) debug_print(x,__FUNCTION__,y,##z)
++#define DEBUG_FUNC() \
++DEBUG(DBG_FUNC_ENTRY, "%s(%d)/%s: ", __FILE__,__LINE__,__FUNCTION__)
++
++#else
++#define DEBUG(x,y,z...)
++#define DEBUG_FUNC()
++#define debug_print_buffer(x,y,z)
++#endif
++
++#undef ASSERT
++#define ASSERT(expression) { \
++        if (!(expression)) { \
++                (void)printk(KERN_ERR \
++                 "Assertion \"%s\" failed: file \"%s\", function \"%s\", line %d\n", \
++                 #expression, __FILE__, __FUNCTION__, __LINE__); \
++		BUG(); \
++        } \
++}
++
++#endif /* _DEBUG_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/exthdrs.c
+@@ -0,0 +1,394 @@
++/*
++ *	Extension Header handling and adding code
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>	
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/types.h>
++#include <linux/slab.h>
++
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "debug.h"
++#include "stats.h"
++#include "mobhdr.h"
++#include "bcache.h"
++#include "config.h"
++
++/**
++ * mipv6_append_home_addr - Add Home Address Option
++ * @opt: buffer for Home Address Option
++ * @offset: offset from beginning of @opt
++ * @addr: address for HAO
++ *
++ * Adds a Home Address Option to a packet.  Option is stored in
++ * @offset from beginning of @opt.  The option is created but the
++ * original source address in IPv6 header is left intact.  The source
++ * address will be changed from home address to CoA after the checksum
++ * has been calculated in getfrag.  Padding is done automatically, and
++ * @opt must have allocated space for both actual option and pad.
++ * Returns offset from @opt to end of options.
++ **/
++int mipv6_append_home_addr(__u8 *opt, int offset, struct in6_addr *addr)
++{
++	int pad;
++	struct mipv6_dstopt_homeaddr *ho;
++
++	DEBUG(DBG_DATADUMP, "HAO: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(addr));
++
++	pad = (6 - offset) & 7;
++	mipv6_add_pad(opt + offset, pad);
++
++	ho = (struct mipv6_dstopt_homeaddr *)(opt + offset + pad);
++	ho->type = MIPV6_TLV_HOMEADDR;
++	ho->length = sizeof(*ho) - 2;
++	ipv6_addr_copy(&ho->addr, addr); 
++
++	return offset + pad + sizeof(*ho);
++}
++static inline int check_hao_validity(struct mipv6_dstopt_homeaddr *haopt, 
++				     u8 *dst1, 
++				     struct in6_addr *saddr, 
++				     struct in6_addr *daddr)
++{
++	int addr_type = ipv6_addr_type(&haopt->addr);
++	struct mipv6_bce bc_entry;
++	
++	if (addr_type & IPV6_ADDR_LINKLOCAL || 
++	    !(addr_type & IPV6_ADDR_UNICAST)) {
++		DEBUG(DBG_INFO, "HAO with link local or non-unicast HoA, "
++		      "not sending BE to "
++		      "home address " 
++		      "%x:%x:%x:%x:%x:%x:%x:%x ",
++		      "care-of  address %x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&haopt->addr),
++		      NIPV6ADDR(saddr));
++		return -EINVAL;
++	} else if (dst1[0] != IPPROTO_MOBILITY && 
++	    (mipv6_bcache_get(&haopt->addr, 
++			      daddr, &bc_entry) != 0 ||
++	     ipv6_addr_cmp(saddr, &bc_entry.coa))) {
++		DEBUG(DBG_INFO, "HAO without binding or incorrect CoA, "
++		      "sending BE code 1: "
++		      "home address %x:%x:%x:%x:%x:%x:%x:%x",
++		      "to care-of address %x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&haopt->addr),
++		      NIPV6ADDR(saddr));
++		return -ENOENT;
++	}
++	return 0;
++}
++/**
++ * mipv6_handle_homeaddr - Home Address Destination Option handler
++ * @skb: packet buffer
++ * @optoff: offset to where option begins
++ *
++ * Handles Home Address Option in IPv6 Destination Option header.
++ * Packet and offset to option are passed.  If HAO is used without
++ * binding, sends a Binding Error code 1.  When sending BE, notify bit
++ * is cleared to prevent IPv6 error handling from sending ICMP
++ * Parameter Problem.  Returns 1 on success, otherwise zero.
++ **/
++int mipv6_handle_homeaddr(struct sk_buff *skb, int optoff)
++{
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr coaddr;
++	struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb;
++	struct mipv6_dstopt_homeaddr *haopt =
++	    (struct mipv6_dstopt_homeaddr *) &skb->nh.raw[optoff];
++	u8 *dst1;
++	int err;
++
++	DEBUG_FUNC();
++	
++	if (haopt->length != sizeof(*haopt) - 2) {
++		DEBUG(DBG_WARNING, "HAO has invalid length");
++		MIPV6_INC_STATS(n_ha_drop.invalid);
++		return 0;
++	}
++	dst1 = (u8 *)skb->h.raw;
++	err = check_hao_validity(haopt, dst1, saddr, &skb->nh.ipv6h->daddr);
++
++	if (err) {
++		haopt->type &= ~(0x80); /* clear notify bit */
++		if (err == -ENOENT)
++			mipv6_send_be(&skb->nh.ipv6h->daddr, saddr,
++				      &haopt->addr, MIPV6_BE_HAO_WO_BINDING);
++		MIPV6_INC_STATS(n_ha_drop.misc);
++		return 0;
++	}
++	ipv6_addr_copy(&coaddr, saddr);
++	ipv6_addr_copy(saddr, &haopt->addr);
++	ipv6_addr_copy(&haopt->addr, &coaddr);
++	opt->hao = optoff;
++	if (mip6_fn.mn_check_tunneled_packet != NULL)
++		mip6_fn.mn_check_tunneled_packet(skb);
++
++	MIPV6_INC_STATS(n_ha_rcvd);
++	return 1;
++}
++
++/**
++ * mipv6_icmp_swap_addrs - Switch HAO and src and RT2 and dest for ICMP errors
++ * @skb: packet buffer
++ *
++ * Reset the source address and the Home Address option in skb before
++ * appending it to an ICMP error message, so original packet appears
++ * in the error message rather than mangled.
++ **/
++void mipv6_icmp_swap_addrs(struct sk_buff *skb)
++{
++	struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
++	struct in6_addr tmp;
++	struct in6_addr *hoa;
++	DEBUG_FUNC();
++	if (opt->srcrt2) {
++		struct rt2_hdr *rt2;
++		rt2 = (struct rt2_hdr *)(skb->nh.raw + opt->srcrt2);
++		hoa = &rt2->addr;
++
++		ipv6_addr_copy(&tmp, hoa);
++		ipv6_addr_copy(hoa, &skb->nh.ipv6h->daddr);
++		ipv6_addr_copy(&skb->nh.ipv6h->daddr, &tmp);
++		rt2->rt_hdr.segments_left++;
++		skb->nh.ipv6h->hop_limit++;
++	}
++	if (opt->hao) {
++		struct mipv6_dstopt_homeaddr *hao;
++		hao = (struct mipv6_dstopt_homeaddr *)(skb->nh.raw + opt->hao);
++		hoa = &hao->addr;
++
++		ipv6_addr_copy(&tmp, hoa);
++		ipv6_addr_copy(hoa, &skb->nh.ipv6h->saddr);
++		ipv6_addr_copy(&skb->nh.ipv6h->saddr, &tmp);
++	}
++}
++
++/**
++ * mipv6_append_rt2hdr - Add Type 2 Routing Header
++ * @rt: buffer for new routing header
++ * @addr: intermediate hop address
++ *
++ * Adds a Routing Header Type 2 in a packet.  Stores newly created
++ * routing header in buffer @rt.  Type 2 RT only carries one address,
++ * so there is no need to process old routing header.  @rt must have
++ * allocated space for 24 bytes.
++ **/
++void mipv6_append_rt2hdr(struct ipv6_rt_hdr *rt, struct in6_addr *addr)
++{
++	struct rt2_hdr *rt2 = (struct rt2_hdr *)rt;
++
++        DEBUG(DBG_DATADUMP, "RT2: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(addr));
++
++	if (ipv6_addr_type(addr) == IPV6_ADDR_MULTICAST) {
++		DEBUG(DBG_ERROR, "destination address not unicast");
++		return;
++	}
++
++	memset(rt2, 0, sizeof(*rt2));
++	rt2->rt_hdr.type = 2;
++	rt2->rt_hdr.hdrlen = 2;
++	rt2->rt_hdr.segments_left = 1;
++	ipv6_addr_copy(&rt2->addr, addr);
++}
++
++/**
++ * mipv6_append_dst1opts - Add Destination Option (1) Headers
++ * @dst1opt: buffer for new destination options
++ * @saddr: address for Home Address Option
++ * @old_dst1opt: old destination options
++ * @len: length of options
++ *
++ * Adds Destination Option (1) Header to a packet.  New options are
++ * stored in @dst1opt.  If old destination options exist, they are
++ * copied from @old_dst1opt.  Only Home Address Option is destination
++ * option.  @dstopt must have allocated space for @len bytes.  @len
++ * includes Destination Option Header (2 bytes), Home Address Option
++ * (18 bytes) and possible HAO pad (8n+6).
++ **/
++/*
++ * ISSUE: Home Address Destination Option should really be added to a
++ * new destination option header specified in Mobile IPv6 spec which
++ * should be placed after routing header(s), but before fragmentation
++ * header.  Putting HAO in DO1 works for now, but support for the new
++ * placement should be added to the IPv6 stack.
++ */
++void 
++mipv6_append_dst1opts(struct ipv6_opt_hdr *dst1opt, struct in6_addr *saddr,
++		      struct ipv6_opt_hdr *old_dst1opt, int len)
++{
++	int offset;
++
++	if (old_dst1opt) {
++		memcpy(dst1opt, old_dst1opt, ipv6_optlen(old_dst1opt));
++		offset = ipv6_optlen(old_dst1opt);
++	} else {
++		offset = sizeof (*dst1opt);
++	}
++	dst1opt->hdrlen = (len >> 3) - 1;
++	mipv6_append_home_addr((__u8 *) dst1opt, offset, saddr);
++}
++
++/**
++ * mipv6_modify_txoptions - Modify outgoing packets
++ * @sk: socket
++ * @skb: packet buffer for outgoing packet
++ * @old_opt: transmit options
++ * @fl: packet flow structure
++ * @dst: pointer to destination cache entry
++ *
++ * Adds Home Address Option (for MN packets, when not at home) and
++ * Routing Header Type 2 (for CN packets when sending to an MN) to
++ * data packets.  Old extension headers are copied from @old_opt (if
++ * any).  Extension headers are _explicitly_ added for packets with
++ * Mobility Header.  Returns the new header structure, or old if no
++ * changes.
++ **/
++struct ipv6_txoptions *
++mipv6_modify_txoptions(struct sock *sk, struct sk_buff *skb, 
++		       struct ipv6_txoptions *old_opt, struct flowi *fl, 
++		       struct dst_entry **dst)
++{	
++	struct ipv6_opt_hdr *old_hopopt = NULL;
++	struct ipv6_opt_hdr *old_dst1opt = NULL;
++	struct ipv6_rt_hdr *old_srcrt = NULL;
++
++	int srcrtlen = 0, dst1len = 0;
++	int tot_len, use_hao = 0;
++	struct ipv6_txoptions *opt;
++	struct mipv6_bce bc_entry;
++	struct in6_addr tmpaddr, *saddr, *daddr, coaddr;
++	__u8 *opt_ptr;
++
++	DEBUG_FUNC();
++
++	if (fl->proto == IPPROTO_MOBILITY) return old_opt;
++	/*
++	 * we have to be prepared to the fact that saddr might not be present,
++	 * if that is the case, we acquire saddr just as kernel does.
++	 */
++	saddr = fl ? fl->fl6_src : NULL;
++	daddr = fl ? fl->fl6_dst : NULL;
++
++	if (daddr == NULL)
++		return old_opt;
++	if (saddr == NULL) {
++		int err = ipv6_get_saddr(NULL, daddr, &tmpaddr);
++		if (err)
++			return old_opt;
++		else
++			saddr = &tmpaddr;
++	}
++
++	DEBUG(DBG_DATADUMP,
++	      "dest. address of packet: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(daddr));
++ 	DEBUG(DBG_DATADUMP, " and src. address: %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(saddr));
++
++	if (old_opt) {
++		old_hopopt = old_opt->hopopt;
++		old_dst1opt = old_opt->dst1opt;
++		old_srcrt = old_opt->srcrt;
++	} 
++
++	if (mip6_fn.mn_use_hao != NULL)
++		use_hao = mip6_fn.mn_use_hao(daddr, saddr);
++
++	if (use_hao) {
++		if (old_dst1opt)
++			dst1len = ipv6_optlen(old_dst1opt);
++		dst1len += sizeof(struct mipv6_dstopt_homeaddr) +
++			((6 - dst1len) & 7); /* padding */
++	}
++
++	if (mipv6_bcache_get(daddr, saddr, &bc_entry) == 0)
++		srcrtlen = sizeof(struct rt2_hdr);
++
++	if ((tot_len = srcrtlen + dst1len) == 0) { 
++		return old_opt;
++	}
++
++	tot_len += sizeof(*opt);
++
++	if (!(opt = kmalloc(tot_len, GFP_ATOMIC))) {
++		return NULL;
++	}
++	memset(opt, 0, tot_len);
++	opt->tot_len = tot_len;
++	opt_ptr = (__u8 *) (opt + 1);
++	
++	if (old_srcrt) {
++		opt->srcrt = old_srcrt;
++		opt->opt_nflen += ipv6_optlen(old_srcrt);
++	}
++
++	if (srcrtlen) {
++		DEBUG(DBG_DATADUMP, "Binding exists. Adding routing header");
++
++		opt->srcrt2 = (struct ipv6_rt_hdr *) opt_ptr;
++		opt->opt_nflen += srcrtlen;
++		opt_ptr += srcrtlen;
++		
++		/*
++		 * Append care-of-address to routing header (original
++		 * destination address is home address, the first
++		 * source route segment gets put to the destination
++		 * address and the home address gets to the last
++		 * segment of source route (just as it should)) 
++		 */
++
++		ipv6_addr_copy(&coaddr, &bc_entry.coa);
++
++		mipv6_append_rt2hdr(opt->srcrt2, &coaddr);
++
++		/*
++		 * reroute output (we have to do this in case of TCP
++                 * segment) unless a routing header of type 0 is also added
++		 */
++		if (dst && !opt->srcrt) {
++			struct in6_addr *tmp = fl->fl6_dst;
++			fl->fl6_dst = &coaddr;
++
++			dst_release(*dst);
++			*dst = ip6_route_output(sk, fl);
++			if (skb)
++				skb->dst = *dst;
++			fl->fl6_dst = tmp;
++
++			DEBUG(DBG_DATADUMP, "Rerouted outgoing packet");
++		}
++	}
++
++	/* Only home address option is inserted to first dst opt header */
++	if (dst1len) {
++		opt->dst1opt = (struct ipv6_opt_hdr *) opt_ptr;
++		opt->opt_flen += dst1len;
++		opt_ptr += dst1len;
++		mipv6_append_dst1opts(opt->dst1opt, saddr, 
++				      old_dst1opt, dst1len);
++		opt->mipv6_flags = MIPV6_SND_HAO;
++	} else if (old_dst1opt) {
++		opt->dst1opt = old_dst1opt;
++		opt->opt_flen += ipv6_optlen(old_dst1opt);
++	}
++	if (old_hopopt) {
++		opt->hopopt = old_hopopt;
++		opt->opt_nflen += ipv6_optlen(old_hopopt);
++	}	
++	
++	return opt;
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/exthdrs.h
+@@ -0,0 +1,47 @@
++/*
++ *	MIPL Mobile IPv6 Extension Headers header file
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MIPV6_EXTHDRS_H
++#define _MIPV6_EXTHDRS_H
++
++struct in6_addr;
++struct sk_buff;
++struct ipv6_rt_hdr;
++struct ipv6_opt_hdr;
++struct ipv6_txoptions;
++struct flowi;
++struct dst_entry;
++/*
++ * Home Address Destination Option function prototypes
++ */
++int mipv6_append_home_addr(__u8 *opt, int offset, struct in6_addr *addr);
++
++int mipv6_handle_homeaddr(struct sk_buff *skb, int optoff);
++
++void mipv6_icmp_swap_addrs(struct sk_buff *skb);
++
++/*
++ * Creates a routing header of type 2.
++ */
++void mipv6_append_rt2hdr(struct ipv6_rt_hdr *srcrt, struct in6_addr *addr);
++
++/* Function to add the first destination option header, which may
++ * include a home address option.  
++ */
++void mipv6_append_dst1opts(struct ipv6_opt_hdr *dst1opt, struct in6_addr *saddr,
++			   struct ipv6_opt_hdr *old_dst1opt, int len);
++
++struct ipv6_txoptions *mipv6_modify_txoptions(
++	struct sock *sk, struct sk_buff *skb,
++	struct ipv6_txoptions *old_opt, struct flowi *fl,
++	struct dst_entry **dst);
++
++#endif /* _MIPV6_EXTHDRS_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/ha.c
+@@ -0,0 +1,553 @@
++/*
++ *      Home-agent functionality
++ *
++ *      Authors:
++ *      Sami Kivisaari           <skivisaa@cc.hut.fi>
++ *      Henrik Petander          <lpetande@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *   
++ *      Changes: Venkata Jagana,
++ *               Krishna Kumar     : Statistics fix
++ *               Masahide Nakamura : Use of mipv6_forward  
++ *     
++ */
++
++#include <linux/autoconf.h>
++#include <linux/net.h>
++#include <linux/skbuff.h>
++#include <linux/if_ether.h>
++#include <linux/netdevice.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/netfilter.h>
++#include <linux/netfilter_ipv6.h>
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif
++
++#include <net/neighbour.h>
++#include <net/ipv6.h>
++#include <net/ip6_fib.h>
++#include <net/ip6_route.h>
++#include <net/ndisc.h>
++#include <net/addrconf.h>
++#include <net/neighbour.h>
++
++#include "tunnel_ha.h"
++#include "bcache.h"
++#include "stats.h"
++#include "debug.h"
++#include "util.h"
++#include "ha.h"
++#include "config.h"
++#include "mobhdr.h"
++
++static int mipv6_ha_tunnel_sitelocal = 0;
++
++#ifdef CONFIG_SYSCTL
++
++static struct ctl_table_header *mipv6_ha_sysctl_header;
++
++static struct mipv6_ha_sysctl_table
++{
++	struct ctl_table_header *sysctl_header;
++	ctl_table mipv6_vars[3];
++	ctl_table mipv6_mobility_table[2];
++	ctl_table mipv6_proto_table[2];
++	ctl_table mipv6_root_table[2];
++} mipv6_ha_sysctl = {
++	NULL,
++
++        {{NET_IPV6_MOBILITY_TUNNEL_SITELOCAL, "tunnel_sitelocal",
++	  &mipv6_ha_tunnel_sitelocal, sizeof(int), 0644, NULL, 
++	  &proc_dointvec},
++	 {0}},
++
++	{{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, 
++	  mipv6_ha_sysctl.mipv6_vars}, {0}},
++	{{NET_IPV6, "ipv6", NULL, 0, 0555, 
++	  mipv6_ha_sysctl.mipv6_mobility_table}, {0}},
++	{{CTL_NET, "net", NULL, 0, 0555, 
++	  mipv6_ha_sysctl.mipv6_proto_table}, {0}}
++};
++
++#endif /* CONFIG_SYSCTL */
++
++
++/*  this is defined in kernel IPv6 module (sockglue.c)  */
++extern struct packet_type ipv6_packet_type;
++
++/* mipv6_forward: Intercept NS packets destined to home address of MN */
++int mipv6_forward(struct sk_buff *skb)
++{
++	struct ipv6hdr *ipv6h;
++	struct in6_addr *daddr, *saddr;
++	__u8 nexthdr;
++	int nhoff;
++	
++	if (skb == NULL) return  0;
++	
++	ipv6h = skb->nh.ipv6h;
++	daddr = &ipv6h->daddr;
++	saddr = &ipv6h->saddr;
++
++	nexthdr = ipv6h->nexthdr;
++	nhoff = sizeof(*ipv6h);
++   
++	if (ipv6_ext_hdr(nexthdr))
++		nhoff = ipv6_skip_exthdr(skb, nhoff, &nexthdr,
++					 skb->len - sizeof(*ipv6h));
++	
++	/* Do not to forward Neighbor Solicitation to Home Address of MN */
++	if (nexthdr == IPPROTO_ICMPV6) {
++		struct icmp6hdr *icmp6h;
++		int dest_type;
++		
++		if (nhoff < 0 || !pskb_may_pull(skb, nhoff + 
++						sizeof(struct icmp6hdr))) {
++			kfree_skb(skb);
++			return 0;
++                   }
++		
++		dest_type = ipv6_addr_type(daddr);
++		icmp6h = (struct icmp6hdr *)&skb->nh.raw[nhoff];
++		
++		/* Intercepts NS to HoA of MN */
++
++		if ((icmp6h->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) ||
++		    ((dest_type & IPV6_ADDR_MULTICAST) &&
++		     (icmp6h->icmp6_type == NDISC_ROUTER_ADVERTISEMENT))) {
++			ip6_input(skb);
++		} else {
++			ip6_forward(skb);
++		}
++	} else {
++		ip6_forward(skb);
++	}
++	return 0;
++}
++
++
++/**
++ * mipv6_proxy_nd_rem - stop acting as a proxy for @home_address
++ * @home_addr: address to remove
++ * @ha_addr: home agent's address on home link
++ * @linklocal: link-local compatibility bit
++ *
++ * When Home Agent acts as a proxy for an address it must leave the
++ * solicited node multicast group for that address and stop responding 
++ * to neighbour solicitations.  
++ **/
++static int mipv6_proxy_nd_rem(struct in6_addr *home_addr,
++			      int ifindex, int linklocal)
++{
++        /* When MN returns home HA leaves the solicited mcast groups
++         * for MNs home addresses 
++	 */
++	int err;
++	struct net_device *dev;
++	
++	DEBUG_FUNC();
++	
++        if ((dev = dev_get_by_index(ifindex)) == NULL) {
++		DEBUG(DBG_ERROR, "couldn't get dev");
++		return -ENODEV;
++	}
++#if 1	/* TEST */
++	/* Remove link-local entry */
++	if (linklocal) {
++		struct in6_addr ll_addr;
++		mipv6_generate_ll_addr(&ll_addr, home_addr);
++		if ((err = pneigh_delete(&nd_tbl, &ll_addr, dev)) < 0) {
++			DEBUG(DBG_INFO,
++			      "peigh_delete failed for "
++			      "%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(&ll_addr));	
++		}
++	}
++#endif
++	/* Remove global (or site-local) entry */
++	if ((err = pneigh_delete(&nd_tbl, home_addr, dev)) < 0) {
++		DEBUG(DBG_INFO,
++		      "peigh_delete failed for " 
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(home_addr));
++	}
++	dev_put(dev);
++	return err;
++}
++
++/**
++ * mipv6_proxy_nd - join multicast group for this address
++ * @home_addr: address to defend
++ * @ha_addr: home agent's address on home link
++ * @linklocal: link-local compatibility bit
++ *
++ * While Mobile Node is away from home, Home Agent acts as a proxy for
++ * @home_address. HA responds to neighbour solicitations for  @home_address 
++ * thus getting all packets destined to home address of MN. 
++ **/
++static int mipv6_proxy_nd(struct in6_addr *home_addr, 
++			  int ifindex, int linklocal)
++{  
++	/* The HA sends a proxy ndisc_na message to all hosts on MN's
++	 * home subnet by sending a neighbor advertisement with the
++	 * home address or all addresses of the mobile node if the
++	 * prefix is not 0. The addresses are formed by combining the
++	 * suffix or the host part of the address with each subnet
++	 * prefix that exists in the home subnet 
++	 */
++	
++        /* Since no previous entry for MN exists a proxy_nd advertisement
++	 * is sent to all nodes link local multicast address
++	 */	
++	int err = -1;
++
++	struct net_device *dev;
++	struct in6_addr na_saddr;
++	struct in6_addr ll_addr;
++	struct pneigh_entry *ll_pneigh;
++	struct in6_addr mcdest;
++	int send_ll_na = 0;
++	int inc_opt = 1;
++	int solicited = 0;
++	int override = 1;
++	
++	DEBUG_FUNC();
++	
++	if ((dev = dev_get_by_index(ifindex)) == NULL) {
++		DEBUG(DBG_ERROR, "couldn't get dev");
++		return -ENODEV;
++	}
++	
++	if (!pneigh_lookup(&nd_tbl, home_addr, dev, 1)) {
++		DEBUG(DBG_INFO,
++		      "peigh_lookup failed for "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(home_addr));
++		goto free_dev;
++	}
++#if 1 /* TEST */
++	if (linklocal) {
++		mipv6_generate_ll_addr(&ll_addr, home_addr);
++		
++		if ((ll_pneigh = pneigh_lookup(&nd_tbl, &ll_addr, 
++					       dev, 1)) == NULL) {
++			DEBUG(DBG_INFO,
++			      "peigh_lookup failed for "
++			      "%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(&ll_addr));
++			pneigh_delete(&nd_tbl, home_addr, dev);
++			goto free_dev;
++		} else {
++			send_ll_na = 1;
++		}
++	} else {
++		ll_pneigh = NULL;
++	}
++#endif	
++	/* Proxy neighbor advertisement of MN's home address 
++	 * to all nodes solicited multicast address 
++	 */
++	if (!ipv6_get_lladdr(dev, &na_saddr)) {	
++		ipv6_addr_all_nodes(&mcdest); 
++		ndisc_send_na(dev, NULL, &mcdest, home_addr, 0, 
++			      solicited, override, inc_opt);
++#if 1 /* TEST */
++		if (send_ll_na) {
++			ndisc_send_na(dev, NULL, &mcdest, &ll_addr, 
++				      0, solicited, override, inc_opt);
++		}
++#endif
++		err = 0;
++	} else {
++		DEBUG(DBG_ERROR, "failed to get link local address for sending proxy NA");
++	}
++free_dev:
++	dev_put(dev);
++	return err;
++	
++}
++
++struct inet6_ifaddr *is_on_link_ipv6_address(struct in6_addr *mn_haddr,
++					     struct in6_addr *ha_addr)
++{
++	struct inet6_ifaddr *ifp;
++	struct inet6_dev *in6_dev;
++	struct inet6_ifaddr *oifp = NULL;
++
++	if ((ifp = ipv6_get_ifaddr(ha_addr, 0)) == NULL)
++		return NULL;
++
++	if ((in6_dev = ifp->idev) != NULL) {
++		in6_dev_hold(in6_dev);
++		oifp = in6_dev->addr_list;
++		while (oifp != NULL) {
++			spin_lock(&oifp->lock);
++			if (mipv6_prefix_compare(&oifp->addr, mn_haddr,
++						 oifp->prefix_len) &&
++			    !(oifp->flags & IFA_F_TENTATIVE)) {
++				spin_unlock(&oifp->lock);
++				DEBUG(DBG_INFO, "Home Addr Opt: on-link");
++				in6_ifa_hold(oifp);
++				break;
++			}
++			spin_unlock(&oifp->lock);
++			oifp = oifp->if_next;
++		}
++		in6_dev_put(in6_dev);
++	}
++	in6_ifa_put(ifp);
++/*      DEBUG(DBG_WARNING, "Home Addr Opt NOT on-link"); */
++	return oifp;
++
++}
++
++/*
++ * Lifetime checks. ifp->valid_lft >= ifp->prefered_lft always (see addrconf.c)
++ * Returned value is in seconds.
++ */
++
++static __u32 get_min_lifetime(struct inet6_ifaddr *ifp, __u32 lifetime)
++{
++	__u32 rem_lifetime = 0;
++	unsigned long now = jiffies;
++
++	if (ifp->valid_lft == 0) {
++		rem_lifetime = lifetime;
++	} else {
++		__u32 valid_lft_left =
++		    ifp->valid_lft - ((now - ifp->tstamp) / HZ);
++		rem_lifetime =
++		    min_t(unsigned long, valid_lft_left, lifetime);
++	}
++
++	return rem_lifetime;
++}
++
++#define MAX_LIFETIME 1000
++
++/**
++ * mipv6_lifetime_check - check maximum lifetime is not exceeded
++ * @lifetime: lifetime to check
++ *
++ * Checks @lifetime does not exceed %MAX_LIFETIME.  Returns @lifetime
++ * if not exceeded, otherwise returns %MAX_LIFETIME.
++ **/
++static int mipv6_lifetime_check(int lifetime)
++{
++	return (lifetime > MAX_LIFETIME) ? MAX_LIFETIME : lifetime;
++}
++
++/* Generic routine handling finish of BU processing */
++void mipv6_bu_finish(struct inet6_ifaddr *ifp, int ifindex, __u8 ba_status,
++		     struct in6_addr *daddr, struct in6_addr *haddr,
++		     struct in6_addr *coa, struct in6_addr *rep_coa,
++		     __u32 ba_lifetime, __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	int err;
++
++	if (ba_status >= REASON_UNSPECIFIED) {
++		/* DAD failed */
++		goto out;
++	}
++	
++	ba_lifetime = get_min_lifetime(ifp, ba_lifetime);
++	ba_lifetime = mipv6_lifetime_check(ba_lifetime);
++
++	if ((err = mipv6_bcache_add(ifindex, daddr, haddr, coa, 
++				    ba_lifetime, sequence, flags,
++				    HOME_REGISTRATION)) != 0 ) {
++		DEBUG(DBG_WARNING, "home reg failed.");
++
++		if (err == -ENOMEDIUM)
++			return;
++
++		ba_status = INSUFFICIENT_RESOURCES;
++	} else {
++		DEBUG(DBG_INFO, "home reg succeeded.");
++	}
++
++	DEBUG(DBG_DATADUMP, "home_addr: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(haddr));
++	DEBUG(DBG_DATADUMP, "coa: %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(coa));
++	DEBUG(DBG_DATADUMP, "lifet:%d, seq:%d", ba_lifetime, sequence);
++out:
++	mipv6_send_ba(daddr, haddr, coa, rep_coa, ba_status, sequence,
++		      ba_lifetime, k_bu);
++}
++
++static int ha_proxy_create(int flags, int ifindex, struct in6_addr *coa,
++			   struct in6_addr *our_addr, struct in6_addr *home_addr)
++{
++	int ret;
++
++	if ((ret = mipv6_add_tnl_to_mn(coa, our_addr, home_addr)) <= 0) {
++		if (ret != -ENOMEDIUM) {
++			DEBUG(DBG_ERROR, "unable to configure tunnel to MN!");
++		}
++		return -1;
++	}
++	if (mipv6_proxy_nd(home_addr, ifindex, 
++			   flags & MIPV6_BU_F_LLADDR) != 0) {
++		DEBUG(DBG_ERROR, "mipv6_proxy_nd failed!");
++		mipv6_del_tnl_to_mn(coa, our_addr, home_addr);
++		return -2;
++	}
++	return 0;
++}
++
++static void ha_proxy_del(struct in6_addr *home_addr, struct mipv6_bce *entry)
++{
++	if (mipv6_proxy_nd_rem(&entry->home_addr, entry->ifindex,
++			       entry->flags & MIPV6_BU_F_LLADDR) == 0) {
++		DEBUG(DBG_INFO, "proxy_nd succ");
++	} else {
++		DEBUG(DBG_INFO, "proxy_nd fail");
++	}
++	mipv6_del_tnl_to_mn(&entry->coa, &entry->our_addr, home_addr);
++}
++
++static void bc_home_add(int ifindex, 
++			struct in6_addr *daddr, struct in6_addr *haddr, 
++			struct in6_addr *coa, struct in6_addr *rep_coa,
++			__u32 lifetime, __u16 sequence, __u8 flags, 
++			__u8 *k_bu)
++{
++	struct inet6_ifaddr *ifp = NULL;
++	__u8 ba_status = SUCCESS;
++
++	DEBUG_FUNC();
++
++	ifp = is_on_link_ipv6_address(haddr, daddr);
++
++	if (ifp == NULL) {
++		ba_status = NOT_HOME_SUBNET;
++	} else if (((ipv6_addr_type(haddr) & IPV6_ADDR_SITELOCAL) ||
++		    (ipv6_addr_type(coa) & IPV6_ADDR_SITELOCAL))
++		   && !mipv6_ha_tunnel_sitelocal) {
++		/* Site-local home or care-of addresses are not 
++		   accepted by default */
++		ba_status = ADMINISTRATIVELY_PROHIBITED;
++	} else {
++		int ret;
++
++		ifindex = ifp->idev->dev->ifindex;
++
++		if ((ret = mipv6_dad_start(ifp, ifindex, daddr, 
++					   haddr, coa, rep_coa, lifetime,
++					   sequence, flags)) < 0) {
++			/* An error occurred */
++			ba_status = -ret;
++		} else if (ret) {
++			/* DAD is needed to be performed. */
++			in6_ifa_put(ifp);
++			return;
++		}
++	}
++
++	mipv6_bu_finish(ifp, ifindex, ba_status, daddr, haddr, coa, 
++			rep_coa, lifetime, sequence, flags, k_bu);
++	if (ifp)
++		in6_ifa_put(ifp);
++}
++
++static void bc_home_delete(struct in6_addr *daddr, struct in6_addr *haddr, 
++			   struct in6_addr *coa, struct in6_addr *rep_coa, 
++			   __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	__u8 status = SUCCESS;
++	struct mipv6_bce bce;
++
++	/* Primary Care-of Address Deregistration */
++	if (mipv6_bcache_get(haddr, daddr, &bce) < 0) {
++		DEBUG(DBG_INFO, "entry is not in cache");
++		status = NOT_HA_FOR_MN;
++	} else {
++		ha_proxy_del(&bce.home_addr, &bce);
++		mipv6_bcache_delete(haddr, daddr, HOME_REGISTRATION);
++	}
++	mipv6_send_ba(daddr, haddr, coa, rep_coa, status, sequence, 0, k_bu);
++}
++
++extern int mipv6_ra_rcv_ptr(struct sk_buff *skb, struct icmp6hdr *msg);
++
++
++static int
++mipv6_ha_tnl_xmit_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_encapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_ha_tnl_xmit_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_ENCAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_ha_tnl_xmit_stats_hook
++};
++
++static int
++mipv6_ha_tnl_rcv_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_decapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_ha_tnl_rcv_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_DECAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_ha_tnl_rcv_stats_hook
++};
++
++static struct mip6_func old;
++
++int __init mipv6_ha_init(void)
++{
++	DEBUG_FUNC();
++	
++#ifdef CONFIG_SYSCTL
++	if (!(mipv6_ha_sysctl_header = 
++	      register_sysctl_table(mipv6_ha_sysctl.mipv6_root_table, 0)))
++		printk(KERN_ERR "Failed to register sysctl handlers!");
++#endif
++	memcpy(&old, &mip6_fn, sizeof(struct mip6_func));
++	mip6_fn.bce_home_add = bc_home_add;
++	mip6_fn.bce_home_del = bc_home_delete;
++	mip6_fn.proxy_del = ha_proxy_del;
++	mip6_fn.proxy_create = ha_proxy_create;
++	/*  register packet interception hooks  */
++	ip6ip6_tnl_register_hook(&mipv6_ha_tnl_xmit_stats_ops);
++	ip6ip6_tnl_register_hook(&mipv6_ha_tnl_rcv_stats_ops);
++	return 0;
++}
++
++void __exit mipv6_ha_exit(void)
++{
++	DEBUG_FUNC();
++
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_ha_sysctl_header);
++#endif
++
++	/*  remove packet interception hooks  */
++	ip6ip6_tnl_unregister_hook(&mipv6_ha_tnl_rcv_stats_ops);
++	ip6ip6_tnl_unregister_hook(&mipv6_ha_tnl_xmit_stats_ops);
++
++	mip6_fn.bce_home_add = old.bce_home_add;
++	mip6_fn.bce_home_del = old.bce_home_del;
++	mip6_fn.proxy_del = old.proxy_del;
++	mip6_fn.proxy_create = old.proxy_create;
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/ha.h
+@@ -0,0 +1,39 @@
++/*
++ *      MIPL Mobile IPv6 Home Agent header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HA_H
++#define _HA_H
++
++int mipv6_ha_init(void);
++void mipv6_ha_exit(void);
++
++int mipv6_dad_start(struct inet6_ifaddr *ifp, int ifindex,
++		    struct in6_addr *daddr, struct in6_addr *haddr,
++		    struct in6_addr *coa, struct in6_addr *rep_coa,
++		    __u32 ba_lifetime, __u16 sequence, __u8 flags);
++
++void mipv6_bu_finish(struct inet6_ifaddr *ifp, int ifindex, 
++		     __u8 ba_status, struct in6_addr *daddr,
++		     struct in6_addr *haddr, struct in6_addr *coa, 
++		     struct in6_addr *rep_coa, __u32 ba_lifetime,
++		     __u16 sequence, __u8 flags, __u8 *k_bu);
++
++
++static __inline__ void mipv6_generate_ll_addr(struct in6_addr *ll_addr,
++					      struct in6_addr *addr)
++{
++	ll_addr->s6_addr32[0] = htonl(0xfe800000);
++	ll_addr->s6_addr32[1] = 0;
++	ll_addr->s6_addr32[2] = addr->s6_addr32[2];
++	ll_addr->s6_addr32[3] = addr->s6_addr32[3];
++}
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/halist.c
+@@ -0,0 +1,507 @@
++/*
++ *      Home Agents List
++ *
++ *      Authors:
++ *      Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#define PREF_BASE 0xffff /* MAX value for u16 field in RA */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/proc_fs.h>
++#include <linux/init.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++
++#include "hashlist.h"
++#include "util.h"
++#include "debug.h"
++
++struct mipv6_halist {
++	struct hashlist *entries;
++	struct timer_list expire_timer;
++};
++
++static rwlock_t home_agents_lock = RW_LOCK_UNLOCKED;
++
++static struct mipv6_halist home_agents;
++
++struct mipv6_halist_entry {
++	struct hashlist_entry e;
++	int ifindex;			 /* Link identifier		*/
++	struct in6_addr link_local_addr; /* HA's link-local address	*/
++	struct in6_addr global_addr;	 /* HA's Global address 	*/
++	int plen;
++	long preference;		 /* The preference for this HA	*/
++	unsigned long expire;		 /* expiration time (jiffies)	*/
++};
++
++static inline void mipv6_ha_ac_add(struct in6_addr *ll_addr, int ifindex,
++				   struct in6_addr *glob_addr, int plen)
++{
++	struct net_device *dev;
++
++	if ((dev = __dev_get_by_index(ifindex)) && ipv6_chk_addr(ll_addr, dev)) {
++		struct in6_addr addr;
++		mipv6_ha_anycast(&addr, glob_addr, plen);
++		ipv6_dev_ac_inc(dev, &addr);
++	}
++}
++
++static inline void mipv6_ha_ac_del(struct in6_addr *ll_addr, int ifindex,
++				   struct in6_addr *glob_addr, int plen)
++{
++	struct net_device *dev;
++
++	if ((dev = __dev_get_by_index(ifindex)) && ipv6_chk_addr(ll_addr, dev)) {
++		struct in6_addr addr;
++		mipv6_ha_anycast(&addr, glob_addr, plen);
++		ipv6_dev_ac_dec(dev, &addr);
++	}
++}
++
++struct preflist_iterator_args {
++	int count;
++	int requested;
++	int ifindex;
++	struct in6_addr *list;
++};
++
++static int preflist_iterator(void *data, void *args,
++			     unsigned long *pref)
++{
++	struct preflist_iterator_args *state =
++		(struct preflist_iterator_args *)args;
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++	struct in6_addr *newaddr =
++		(struct in6_addr *)state->list + state->count;
++
++	if (state->count >= state->requested)
++		return ITERATOR_STOP;
++
++	if (time_after(jiffies, entry->expire)) {
++		if (!ipv6_addr_any(&entry->link_local_addr)) {
++			mipv6_ha_ac_del(&entry->link_local_addr, 
++					entry->ifindex, 
++					&entry->global_addr, entry->plen);
++		}
++		DEBUG(DBG_INFO, "preflist_iterator: Deleting entry with address %x:%x:%x:%x:%x:%x:%x:%x to list", NIPV6ADDR(&entry->global_addr));
++		return ITERATOR_DELETE_ENTRY;
++	}
++	if (state->ifindex != entry->ifindex)
++		return ITERATOR_CONT;
++
++	ipv6_addr_copy(newaddr, &entry->global_addr);
++	DEBUG(DBG_INFO, "preflist_iterator: adding new entry with address %x:%x:%x:%x:%x:%x:%x:%x to list", NIPV6ADDR(&entry->global_addr));
++	state->count++;
++
++	return ITERATOR_CONT;
++}
++
++static int gc_iterator(void *data, void *args,
++		       unsigned long *pref)
++{
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++
++	int *type = (int *)args;
++
++	if (*type == 1 || time_after(jiffies, entry->expire)) {
++		if (!ipv6_addr_any(&entry->link_local_addr)) {
++			mipv6_ha_ac_del(&entry->link_local_addr, 
++					entry->ifindex, 
++					&entry->global_addr, entry->plen);
++		}
++		return ITERATOR_DELETE_ENTRY;
++	}
++
++	return ITERATOR_CONT;
++}
++
++static int mipv6_halist_gc(int type)
++{
++	DEBUG_FUNC();
++	hashlist_iterate(home_agents.entries, &type, gc_iterator);
++	return 0;
++}
++
++static void mipv6_halist_expire(unsigned long dummy)
++{
++	DEBUG_FUNC();
++
++	write_lock(&home_agents_lock);
++	mipv6_halist_gc(0);
++	write_unlock(&home_agents_lock);
++}
++
++
++static struct mipv6_halist_entry *mipv6_halist_new_entry(void)
++{
++	struct mipv6_halist_entry *entry;
++
++	DEBUG_FUNC();
++
++	entry = hashlist_alloc(home_agents.entries, SLAB_ATOMIC);
++
++	return entry;
++}
++
++
++
++/**
++ * mipv6_halist_add - Add new home agent to the Home Agents List
++ * @ifindex: interface identifier
++ * @glob_addr: home agent's global address
++ * @ll_addr: home agent's link-local address
++ * @pref: relative preference for this home agent
++ * @lifetime: lifetime for the entry
++ *
++ * Adds new home agent to the Home Agents List.  The list is interface
++ * specific and @ifindex tells through which interface the home agent
++ * was heard.  Returns zero on success and negative on failure.
++ **/
++
++int mipv6_halist_add(int ifindex, struct in6_addr *glob_addr, int plen,
++		     struct in6_addr *ll_addr, unsigned int pref, __u32 lifetime)
++{
++	int update = 0, ret = 0;
++	unsigned int mpref;
++	struct mipv6_halist_entry *entry = NULL;
++
++	DEBUG_FUNC();
++
++	write_lock(&home_agents_lock);
++
++	if (glob_addr == NULL || lifetime <= 0) {
++		DEBUG(DBG_WARNING, "invalid arguments");
++		ret = -EINVAL;
++		goto out;
++	}
++	mpref = PREF_BASE - pref;
++	if ((entry = (struct mipv6_halist_entry *)
++	     hashlist_get(home_agents.entries, glob_addr)) != NULL) {
++		if (entry->ifindex == ifindex) {
++			DEBUG(DBG_DATADUMP, "updating old entry with address %x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(glob_addr));
++			update = 1;
++		} else {
++			DEBUG(DBG_INFO, "halist_add : adding new entry with address %x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(glob_addr));
++			update = 0;
++		}
++	}
++	if (update) {
++		entry->expire = jiffies + lifetime * HZ;
++		if (entry->preference != mpref) {
++			entry->preference = mpref;
++			ret = hashlist_reposition(home_agents.entries, 
++						  (void *)entry, mpref);
++		}
++	} else {
++		entry = mipv6_halist_new_entry();
++		if (entry == NULL) {
++			DEBUG(DBG_INFO, "list full");
++			ret = -ENOMEM;
++			goto out;
++		}
++		entry->ifindex = ifindex;
++		if (ll_addr) {
++			ipv6_addr_copy(&entry->link_local_addr, ll_addr);
++			mipv6_ha_ac_add(ll_addr, ifindex, glob_addr, plen);
++		} else
++			ipv6_addr_set(&entry->link_local_addr, 0, 0, 0, 0);
++
++		ipv6_addr_copy(&entry->global_addr, glob_addr);
++		entry->plen = plen;
++		entry->preference = mpref;
++		entry->expire = jiffies + lifetime * HZ;
++		ret = hashlist_add(home_agents.entries, glob_addr, mpref, 
++				   entry);
++	}
++out:
++	write_unlock(&home_agents_lock);
++	return ret;
++}
++
++/**
++ * mipv6_halist_delete - delete home agent from Home Agents List
++ * @glob_addr: home agent's global address
++ *
++ * Deletes entry for home agent @glob_addr from the Home Agent List.
++ **/
++int mipv6_halist_delete(struct in6_addr *glob_addr)
++{
++	struct hashlist_entry *e;
++	struct mipv6_halist_entry *entry;
++	DEBUG_FUNC();
++
++	if (glob_addr == NULL) {
++		DEBUG(DBG_WARNING, "invalid glob addr");
++		return -EINVAL;
++	}
++	write_lock(&home_agents_lock);
++	if ((e = hashlist_get(home_agents.entries, glob_addr)) == NULL) {
++		write_unlock(&home_agents_lock);
++		return -ENOENT;
++	}
++	hashlist_delete(home_agents.entries, e);
++	entry = (struct mipv6_halist_entry *)e;
++	if (!ipv6_addr_any(&entry->link_local_addr)) {
++		mipv6_ha_ac_del(&entry->link_local_addr, entry->ifindex, 
++				&entry->global_addr, entry->plen);
++	}
++	hashlist_free(home_agents.entries, e);
++	write_unlock(&home_agents_lock);
++	return 0;
++}
++
++/**
++ * mipv6_ha_get_pref_list - Get list of preferred home agents
++ * @ifindex: interface identifier
++ * @addrs: pointer to a buffer to store the list
++ * @max: maximum number of home agents to return
++ *
++ * Creates a list of @max preferred (or all known if less than @max)
++ * home agents.  Home Agents List is interface specific so you must
++ * supply @ifindex.  Stores list in addrs and returns number of home
++ * agents stored.  On failure, returns a negative value.
++ **/
++int mipv6_ha_get_pref_list(int ifindex, struct in6_addr **addrs, int max)
++{
++	struct preflist_iterator_args args;
++
++	DEBUG_FUNC();
++	if (max <= 0) {
++		*addrs = NULL;
++		return 0;
++	}
++
++	args.count = 0;
++	args.requested = max;
++	args.ifindex = ifindex;
++	args.list = kmalloc(max * sizeof(struct in6_addr), GFP_ATOMIC);
++
++	if (args.list == NULL) return -ENOMEM;
++
++	read_lock(&home_agents_lock);
++	hashlist_iterate(home_agents.entries, &args, preflist_iterator);
++	read_unlock(&home_agents_lock);
++
++	if (args.count >= 0) {
++		*addrs = args.list;
++	} else {
++		kfree(args.list);
++		*addrs = NULL;
++	}
++
++	return args.count;
++}
++
++struct getaddr_iterator_args {
++	struct net_device *dev;
++	struct in6_addr *addr;
++};
++
++static int getaddr_iterator(void *data, void *args,
++	     unsigned long *pref)
++{
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++	struct getaddr_iterator_args *state =
++		(struct getaddr_iterator_args *)args;
++
++	if (entry->ifindex != state->dev->ifindex)
++		return ITERATOR_CONT;
++
++	if (ipv6_chk_addr(&entry->global_addr, state->dev)) {
++		ipv6_addr_copy(state->addr, &entry->global_addr);
++		return ITERATOR_STOP;
++	}
++	return ITERATOR_CONT;
++}
++
++/*
++ * Get Home Agent Address for given interface.  If node is not serving
++ * as a HA for this interface returns negative error value.
++ */
++int mipv6_ha_get_addr(int ifindex, struct in6_addr *addr)
++{
++	struct getaddr_iterator_args args;
++	struct net_device *dev;
++
++	if (ifindex <= 0)
++		return -EINVAL;
++
++	if ((dev = dev_get_by_index(ifindex)) == NULL)
++		return -ENODEV;
++
++	memset(addr, 0, sizeof(struct in6_addr));
++	args.dev = dev;
++	args.addr = addr;
++	read_lock(&home_agents_lock);
++	hashlist_iterate(home_agents.entries, &args, getaddr_iterator);
++	read_unlock(&home_agents_lock);
++	dev_put(dev);
++
++	if (ipv6_addr_any(addr))
++		return -ENOENT;
++	
++	return 0;
++}
++
++#define HALIST_INFO_LEN 81
++
++struct procinfo_iterator_args {
++	char *buffer;
++	int offset;
++	int length;
++	int skip;
++	int len;
++};
++
++static int procinfo_iterator(void *data, void *args,
++			     unsigned long *pref)
++{
++	struct procinfo_iterator_args *arg =
++		(struct procinfo_iterator_args *)args;
++	struct mipv6_halist_entry *entry =
++		(struct mipv6_halist_entry *)data;
++	unsigned long int expire;
++
++	DEBUG_FUNC();
++
++	if (entry == NULL) return ITERATOR_ERR;
++
++	if (time_after(jiffies, entry->expire)) {
++		if (!ipv6_addr_any(&entry->link_local_addr)) {
++			mipv6_ha_ac_del(&entry->link_local_addr, 
++					entry->ifindex, 
++					&entry->global_addr, entry->plen);
++		}
++		return ITERATOR_DELETE_ENTRY;
++	}
++	if (arg->skip < arg->offset / HALIST_INFO_LEN) {
++		arg->skip++;
++		return ITERATOR_CONT;
++	}
++
++	if (arg->len >= arg->length)
++		return ITERATOR_CONT;
++
++	expire = (entry->expire - jiffies) / HZ;
++
++	arg->len += sprintf(arg->buffer + arg->len, 
++			    "%02d %08x%08x%08x%08x %08x%08x%08x%08x %05ld %05ld\n",
++			    entry->ifindex,
++			    ntohl(entry->global_addr.s6_addr32[0]),
++			    ntohl(entry->global_addr.s6_addr32[1]),
++			    ntohl(entry->global_addr.s6_addr32[2]),
++			    ntohl(entry->global_addr.s6_addr32[3]),
++			    ntohl(entry->link_local_addr.s6_addr32[0]),
++			    ntohl(entry->link_local_addr.s6_addr32[1]),
++			    ntohl(entry->link_local_addr.s6_addr32[2]),
++			    ntohl(entry->link_local_addr.s6_addr32[3]),
++			    -(entry->preference - PREF_BASE), expire);
++
++	return ITERATOR_CONT;
++}
++
++static int halist_proc_info(char *buffer, char **start, off_t offset,
++                            int length)
++{
++	struct procinfo_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.buffer = buffer;
++	args.offset = offset;
++	args.length = length;
++	args.skip = 0;
++	args.len = 0;
++
++	read_lock_bh(&home_agents_lock);
++	hashlist_iterate(home_agents.entries, &args, procinfo_iterator);
++	read_unlock_bh(&home_agents_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % HALIST_INFO_LEN;
++
++	args.len -= offset % HALIST_INFO_LEN;
++
++	if (args.len > length)
++		args.len = length;
++	if (args.len < 0)
++		args.len = 0;
++	
++	return args.len;
++}
++
++static int halist_compare(void *data, void *hashkey)
++{
++	struct mipv6_halist_entry *e = (struct mipv6_halist_entry *)data;
++	struct in6_addr *key = (struct in6_addr *)hashkey;
++
++	return ipv6_addr_cmp(&e->global_addr, key);
++}
++
++static __u32 halist_hash(void *hashkey)
++{
++	struct in6_addr *key = (struct in6_addr *)hashkey;
++	__u32 hash;
++
++	hash = key->s6_addr32[0] ^
++                key->s6_addr32[1] ^
++                key->s6_addr32[2] ^
++                key->s6_addr32[3];
++
++	return hash;
++}
++
++int __init mipv6_halist_init(__u32 size)
++{
++	DEBUG_FUNC();
++
++	if (size <= 0) {
++		DEBUG(DBG_ERROR, "size must be at least 1");
++		return -EINVAL;
++	}
++	init_timer(&home_agents.expire_timer);
++	home_agents.expire_timer.data = 0;
++	home_agents.expire_timer.function = mipv6_halist_expire;
++	home_agents_lock = RW_LOCK_UNLOCKED;
++
++	home_agents.entries = hashlist_create(16, size, sizeof(struct mipv6_halist_entry),
++					       "mip6_halist", NULL, NULL,
++					       halist_compare, halist_hash);
++
++	if (home_agents.entries == NULL) {
++		DEBUG(DBG_ERROR, "Failed to initialize hashlist");
++		return -ENOMEM;
++	}
++
++	proc_net_create("mip6_home_agents", 0, halist_proc_info);
++	DEBUG(DBG_INFO, "Home Agents List initialized");
++	return 0;
++}
++
++void __exit mipv6_halist_exit(void)
++{
++	DEBUG_FUNC();
++	proc_net_remove("mip6_home_agents");
++	write_lock_bh(&home_agents_lock);
++	DEBUG(DBG_INFO, "Stopping the halist timer");
++	del_timer(&home_agents.expire_timer);
++	mipv6_halist_gc(1);
++	write_unlock_bh(&home_agents_lock);
++	hashlist_destroy(home_agents.entries);
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/halist.h
+@@ -0,0 +1,28 @@
++/*
++ *      MIPL Mobile IPv6 Home Agents List header file      
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HALIST_H
++#define _HALIST_H
++
++int mipv6_halist_init(__u32 size);
++
++void mipv6_halist_exit(void);
++
++int mipv6_halist_add(int ifindex, struct in6_addr *glob_addr, int plen,
++		     struct in6_addr *ll_addr, unsigned int pref, __u32 lifetime);
++
++int mipv6_halist_delete(struct in6_addr *glob_addr);
++
++int mipv6_ha_get_pref_list(int ifindex, struct in6_addr **addrs, int max);
++
++int mipv6_ha_get_addr(int ifindex, struct in6_addr *addr);
++
++#endif /* _HALIST_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/hashlist.c
+@@ -0,0 +1,351 @@
++/*
++ *	Generic hashtable with chaining.  Supports secodary sort order
++ *	with doubly linked-list.
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *	Antti Tuominen		<ajtuomin@tml.hut.fi>
++ *
++ *	$Id: s.hashlist.c 1.21 02/10/07 19:31:52+03:00 antti@traci.mipl.mediapoli.com $
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License as
++ *	published by the Free Software Foundation; either version 2 of
++ *	the License, or (at your option) any later version.
++ */
++
++#include <linux/slab.h>
++#include "hashlist.h"
++#include "debug.h"
++
++struct hashlist {
++	int count;		/* entry count	*/
++	int maxcount;		/* max entries	*/
++	__u32 bucketnum;	/* hash buckets	*/
++
++	kmem_cache_t *kmem;
++
++	struct list_head *hashtable;
++	struct list_head sortedlist;
++
++	int (*compare)(void *data, void *hashkey);
++	__u32 (*hash_function)(void *hashkey);
++};
++
++/**
++ * hashlist_create - Create new hashlist
++ * @bucketnum: number of hash buckets
++ * @maxentries: maximum number of entries (0 = no limit)
++ * @size: entry size in bytes
++ * @name: name for kmem_cache_t
++ * @ctor: kmem_cache_t constructor
++ * @dtor: kmem_cache_t destructor
++ * @compare: compare function for key
++ * @hash_function: hash function
++ *
++ * Creates a hashlist structure with @max_entries entries of @size
++ * bytes.  User must supply @hash_function and @compare function for
++ * the hashlist.  User can also supply @ctor and @dtor for kmem_cache.
++ **/
++struct hashlist *hashlist_create(int bucketnum, int max_entries, size_t size,
++				 char *name,
++				 void (*ctor)(void *, kmem_cache_t *, unsigned long),
++				 void (*dtor)(void *, kmem_cache_t *, unsigned long),
++				 int (*compare)(void *data, void *hashkey),
++				 __u32 (*hash_function)(void *hashkey))
++{
++	int i;
++	struct hashlist *hl;
++
++	if (!compare || !hash_function)
++		goto hlfailed;
++
++	hl = kmalloc(sizeof(struct hashlist), GFP_ATOMIC);
++	if (!hl) goto hlfailed;
++
++	hl->kmem = kmem_cache_create(name, size, 0, 0, ctor, dtor);
++	if (!hl->kmem) goto poolfailed;
++
++	hl->hashtable = kmalloc(
++		sizeof(struct list_head) * bucketnum, GFP_ATOMIC);
++	if (!hl->hashtable) goto hashfailed;
++
++	for (i = 0; i < bucketnum; i++)
++		INIT_LIST_HEAD(&hl->hashtable[i]);
++
++	INIT_LIST_HEAD(&hl->sortedlist);
++
++	hl->maxcount = max_entries;
++	hl->count = 0;
++	hl->bucketnum = bucketnum;
++	hl->compare = compare;
++	hl->hash_function = hash_function;
++
++	return hl;
++
++hashfailed:
++	kmem_cache_destroy(hl->kmem);
++	hl->kmem = NULL;
++
++poolfailed:
++	kfree(hl);
++
++hlfailed:
++	DEBUG(DBG_ERROR, "could not create hashlist");
++
++	return NULL;	
++}
++
++/**
++ * hashlist_destroy - Destroy hashlist
++ * @hashlist: hashlist to destroy
++ *
++ * Frees all memory allocated for a hashlist.
++ **/
++void hashlist_destroy(struct hashlist *hashlist)
++{
++	DEBUG_FUNC();
++
++	if (hashlist == NULL) return;
++
++	if (hashlist->hashtable) {
++		kfree(hashlist->hashtable);
++		hashlist->hashtable = NULL;
++	}
++
++	if (hashlist->kmem) {
++		kmem_cache_destroy(hashlist->kmem);
++		hashlist->kmem = NULL;
++	}
++
++	kfree(hashlist);
++
++	return;
++}
++
++/*
++ * Insert a chain of entries to hashlist into correct order.  The
++ * entries are assumed to have valid hashkeys.  We use time_after_eq
++ * for comparing, since it handles wrap-around correctly, and the
++ * sortkey is usually jiffies.
++ */
++static void sorted_insert(struct list_head *lh, struct hashlist_entry *he)
++{
++	struct list_head *p;
++	struct hashlist_entry *hlp = NULL;
++	unsigned long sortkey = he->sortkey;
++
++	if (list_empty(lh)) {
++		list_add(&he->sorted, lh);
++		return;
++	}
++	
++	list_for_each(p, lh) {
++		hlp = list_entry(p, typeof(*hlp), sorted);
++		if (time_after_eq(hlp->sortkey, sortkey)) {
++			list_add(&he->sorted, hlp->sorted.prev);
++			return;
++		}
++	}
++	list_add(&he->sorted, &hlp->sorted);
++}
++
++/**
++ * hashlist_iterate - Apply function for all elements in a hash list
++ * @hashlist: pointer to hashlist
++ * @args: data to pass to the function
++ * @func: pointer to a function
++ *
++ * Apply arbitrary function @func to all elements in a hash list.
++ * @func must be a pointer to a function with the following prototype:
++ * int func(void *entry, void *arg, struct in6_addr *hashkey, unsigned
++ * long *sortkey).  Function must return %ITERATOR_STOP,
++ * %ITERATOR_CONT or %ITERATOR_DELETE_ENTRY.  %ITERATOR_STOP stops
++ * iterator and returns last return value from the function.
++ * %ITERATOR_CONT continues with iteration.  %ITERATOR_DELETE_ENTRY
++ * deletes current entry from the hashlist.  If function changes
++ * hashlist element's sortkey, iterator automatically schedules
++ * element to be reinserted after all elements have been processed.
++ */
++int hashlist_iterate(
++	struct hashlist *hashlist, void *args,
++	hashlist_iterator_t func)
++{
++	int res = ITERATOR_CONT;
++	unsigned long skey;
++	struct list_head *p, *n, repos;
++	struct hashlist_entry *he;
++
++	DEBUG_FUNC();
++	INIT_LIST_HEAD(&repos);
++
++	list_for_each_safe(p, n, &hashlist->sortedlist) {
++		he = list_entry(p, typeof(*he), sorted);
++		if (res == ITERATOR_STOP)
++			break;
++		skey = he->sortkey;
++		res = func(he, args, &he->sortkey);
++		if (res == ITERATOR_DELETE_ENTRY) {
++			hashlist_delete(hashlist, he);
++			hashlist_free(hashlist, he);
++		} else if (skey != he->sortkey) {
++			/* iterator changed the sortkey, schedule for
++			 * repositioning */
++			list_move(&he->sorted, &repos);
++		}
++	}
++	list_for_each_safe(p, n, &repos) {	
++		he = list_entry(p, typeof(*he), sorted);
++		sorted_insert(&hashlist->sortedlist, he);
++	}
++	return res;
++}
++
++/**
++ * hashlist_alloc - Allocate memory for a hashlist entry
++ * @hashlist: hashlist for allocated entry
++ * @size: size of entry in bytes
++ *
++ * Allocates @size bytes memory from @hashlist->kmem.
++ **/
++void *hashlist_alloc(struct hashlist *hashlist, int type)
++{
++	if (hashlist == NULL) return NULL;
++	return kmem_cache_alloc(hashlist->kmem, type);
++}
++
++/**
++ * hashlist_free - Free hashlist entry
++ * @hashlist: hashlist where @he is
++ * @he: entry to free
++ *
++ * Frees an allocated hashlist entry.
++ **/
++void hashlist_free(struct hashlist *hashlist, struct hashlist_entry *he)
++{
++	kmem_cache_free(hashlist->kmem, he);
++}
++
++/**
++ * hashlist_add - Add element to hashlist
++ * @hashlist: pointer to hashlist
++ * @hashkey: hashkey for the element
++ * @sortkey: key for sorting
++ * @data: element data
++ *
++ * Add element to hashlist.  Hashlist is also sorted in a linked list
++ * by @sortkey.
++ */
++int hashlist_add(struct hashlist *hashlist, void *hashkey,
++		 unsigned long sortkey, void *entry)
++{
++	struct hashlist_entry *he = (struct hashlist_entry *)entry;
++	unsigned int hash;
++
++	if (hashlist->count >= hashlist->maxcount)
++		return -1;
++
++	hashlist->count++;
++
++	/*  link the entry to sorted order  */ 
++	he->sortkey = sortkey;
++	sorted_insert(&hashlist->sortedlist, he);
++
++	/*  hash the entry  */
++	hash = hashlist->hash_function(hashkey) % hashlist->bucketnum;
++	list_add(&he->hashlist, &hashlist->hashtable[hash]);
++
++	return 0;
++}
++
++/**
++ * hashlist_get_ex - Get element from hashlist
++ * @hashlist: hashlist
++ * @hashkey: hashkey of the desired entry
++ *
++ * Lookup entry with @hashkey from the hash table using @compare
++ * function for entry comparison.  Returns entry on success, otherwise
++ * %NULL.
++ **/
++struct hashlist_entry *hashlist_get_ex(
++	struct hashlist *hashlist, void *hashkey,
++	int (*compare)(void *data, void *hashkey))
++{
++	struct list_head *p, *bkt;
++	__u32 hash;
++
++	hash = hashlist->hash_function(hashkey) % hashlist->bucketnum;
++	bkt = &hashlist->hashtable[hash];
++
++	/*  scan the entries within the same hashbucket  */
++	list_for_each(p, bkt) {
++		struct hashlist_entry *he = list_entry(p, typeof(*he), 
++						       hashlist);
++		if (compare(he, hashkey) == 0)
++			return he;
++	}
++
++	return NULL;
++}
++
++/**
++ * hashlist_get - Get element from hashlist
++ * @hashlist: hashlist
++ * @hashkey: hashkey of the desired entry
++ *
++ * Lookup entry with @hashkey from the hash table.  Returns entry on
++ * success, otherwise %NULL.
++ **/
++struct hashlist_entry *hashlist_get(struct hashlist *hashlist, void *hashkey)
++{
++	return hashlist_get_ex(hashlist, hashkey, hashlist->compare);
++}
++
++/**
++ * hashlist_reposition - set entry to new position in the list
++ * @hashlist: hashlist
++ * @he: entry to reposition
++ * @sortkey: new sortkey of the entry
++ *
++ * If secondary order sortkey changes, entry must be repositioned in
++ * the sorted list.
++ **/
++int hashlist_reposition(struct hashlist *hashlist, struct hashlist_entry *he,
++			unsigned long sortkey)
++{
++	list_del(&he->sorted);
++	he->sortkey = sortkey;
++	sorted_insert(&hashlist->sortedlist, he);
++
++	return 0;
++}
++
++/**
++ * hashlist_delete - Delete entry from hashlist
++ * @hashlist: hashlist where entry is
++ * @he: entry to delete
++ *
++ * Deletes an entry from the hashlist and sorted list.
++ **/
++void hashlist_delete(struct hashlist *hashlist,
++		     struct hashlist_entry *he)
++{
++	list_del_init(&he->hashlist);
++	list_del_init(&he->sorted);
++
++	hashlist->count--;
++}
++
++/**
++ * hashlist_get_first - Get first item from sorted list
++ * @hashlist: pointer to hashlist
++ *
++ * Returns first item in the secondary sort order.
++ **/
++void * hashlist_get_first(struct hashlist *hashlist)
++{
++	if (list_empty(&hashlist->sortedlist))
++		return NULL;
++	
++	return list_entry(hashlist->sortedlist.next, struct hashlist_entry, sorted);
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/hashlist.h
+@@ -0,0 +1,63 @@
++/*
++ *	MIPL Mobile IPv6 Hashlist header file
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HASHLIST_H
++#define _HASHLIST_H
++
++#define ITERATOR_ERR -1
++#define ITERATOR_CONT 0
++#define ITERATOR_STOP 1
++#define ITERATOR_DELETE_ENTRY 2
++
++struct kmem_cache_t;
++
++struct hashlist_entry {
++	unsigned long sortkey;
++	struct list_head sorted;
++	struct list_head hashlist;
++};
++
++struct hashlist * hashlist_create(
++	int bucketnum, int max_entries, size_t size, char *name,
++	void (*ctor)(void *, kmem_cache_t *, unsigned long),
++	void (*dtor)(void *, kmem_cache_t *, unsigned long),
++	int (*compare)(void *data, void *hashkey),
++	__u32 (*hash_function)(void *hashkey));
++
++void hashlist_destroy(struct hashlist *hashlist);
++
++void *hashlist_alloc(struct hashlist *hashlist, int type);
++
++void hashlist_free(struct hashlist *hashlist, struct hashlist_entry *he);
++
++struct hashlist_entry *hashlist_get(struct hashlist *hashlist, void *hashkey);
++
++struct hashlist_entry *hashlist_get_ex(
++	struct hashlist *hashlist, void *hashkey,
++	int (*compare)(void *data, void *hashkey));
++
++int hashlist_add(struct hashlist *hashlist, void *hashkey,
++		 unsigned long sortkey, void *data);
++
++void hashlist_delete(struct hashlist *hashlist, struct hashlist_entry *he);
++
++/* iterator function */
++typedef int (*hashlist_iterator_t)(void *, void *, unsigned long *);
++
++int hashlist_iterate(struct hashlist *hashlist, void *args,
++		     hashlist_iterator_t func);
++
++void * hashlist_get_first(struct hashlist *hashlist);
++
++int hashlist_reposition(struct hashlist *hashlist, struct hashlist_entry *he,
++			unsigned long sortkey);
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/hmac.c
+@@ -0,0 +1,658 @@
++/*     Authentication algorithms       
++ *	
++ *      Authors: 
++ *       Alexis Olivereau              <Alexis.Olivereau@crm.mot.com>
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ *      Changes: 
++ *      Henrik Petander     :     Cleaned up unused parts
++ *
++ */
++
++#include <linux/sched.h>
++#include <linux/tty.h>
++#include <linux/types.h>
++#include <linux/slab.h>
++#include <linux/in6.h>
++
++#include "hmac.h"
++#define LROLL(x, s) (((x) << (s)) | ((x) >> (32 - (s))))
++
++/* MD5 */
++#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
++#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
++#define H(x, y, z) ((x) ^ (y) ^ (z))
++#define I(x, y, z) ((y) ^ ((x) | ~(z)))
++
++#define FF(a, b, c, d, m, s, t) { \
++ (a) += F ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++#define GG(a, b, c, d, m, s, t) { \
++ (a) += G ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++#define HH(a, b, c, d, m, s, t) { \
++ (a) += H ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++#define II(a, b, c, d, m, s, t) { \
++ (a) += I ((b), (c), (d)) + (m) + (t); \
++ (a) = LROLL((a), (s)); \
++ (a) += (b); \
++ }
++
++#define s11  7
++#define s12 12
++#define s13 17
++#define s14 22
++#define s21  5
++#define s22  9
++#define s23 14
++#define s24 20
++#define s31  4
++#define s32 11
++#define s33 16
++#define s34 23
++#define s41  6
++#define s42 10
++#define s43 15
++#define s44 21
++
++/* SHA-1 */
++#define f(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
++#define g(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
++#define h(x, y, z) ((x) ^ (y) ^ (z))
++
++#define K1 0x5a827999
++#define K2 0x6ed9eba1
++#define K3 0x8f1bbcdc
++#define K4 0xca62c1d6
++
++int ah_hmac_md5_init(struct ah_processing *ahp, u_int8_t *key, u_int32_t key_len)
++{
++	int i;
++	int key_up4;
++	uint32_t ipad = 0x36363636;
++	uint8_t extkey[64];
++
++	ahp->key_auth = key;
++	ahp->key_auth_len = key_len;
++	ahp->context = (void *) kmalloc(sizeof(MD5_CTX), GFP_ATOMIC);
++	if (ahp->context == NULL)
++		return -1;
++	md5_init((MD5_CTX *) ahp->context);
++	if ((64 * sizeof(uint8_t)) < ahp->key_auth_len) {
++		printk("buffer overflow!");
++		return -1;
++	}
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ ipad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = ipad;
++
++	md5_compute((MD5_CTX *) ahp->context, extkey, 64);
++	return 0;
++}
++
++void ah_hmac_md5_loop(struct ah_processing *ahp, void *str, uint32_t len)
++{
++	md5_compute((MD5_CTX *) ahp->context, str, len);
++}
++
++void ah_hmac_md5_result(struct ah_processing *ahp, char *digest)
++{
++	uint8_t inner[HMAC_MD5_HASH_LEN];
++	int i;
++	int key_up4;
++	uint32_t opad = 0x5c5c5c5c;
++	uint8_t extkey[64];
++
++	md5_final((MD5_CTX *) ahp->context, inner);
++	md5_init((MD5_CTX *) ahp->context);
++
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ opad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = opad;
++
++	md5_compute((MD5_CTX *) ahp->context, extkey, 64);
++	md5_compute((MD5_CTX *) ahp->context, inner, HMAC_MD5_HASH_LEN);
++
++	md5_final((MD5_CTX *) ahp->context, digest);
++
++	kfree(ahp->context);
++}
++
++int ah_hmac_sha1_init(struct ah_processing *ahp, u_int8_t *key, u_int32_t key_len)
++{
++	int i;
++	int key_up4;
++	uint32_t ipad = 0x36363636;
++	uint8_t extkey[64];
++
++	ahp->key_auth = key;
++	ahp->key_auth_len = key_len;
++
++	ahp->context = (void *) kmalloc(sizeof(SHA1_CTX), GFP_ATOMIC);
++	//if (ahp->context == NULL)
++	//	return -1;
++
++	sha1_init((SHA1_CTX *) ahp->context);
++
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ ipad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = ipad;
++
++	sha1_compute((SHA1_CTX *) ahp->context, extkey, 64);
++	return 0;
++}
++
++void ah_hmac_sha1_loop(struct ah_processing *ahp, void *str, uint32_t len)
++{
++	if (!ahp)
++		return;
++	sha1_compute((SHA1_CTX *) ahp->context, str, len);
++}
++
++void ah_hmac_sha1_result(struct ah_processing *ahp, char *digest)
++{
++	uint8_t inner[HMAC_SHA1_HASH_LEN];
++	int i;
++	int key_up4;
++	uint32_t opad = 0x5c5c5c5c;
++	uint8_t extkey[64];
++
++	if (!ahp)
++		return;
++	sha1_final((SHA1_CTX *) ahp->context, inner);
++	sha1_init((SHA1_CTX *) ahp->context);
++
++	memcpy(extkey, ahp->key_auth, ahp->key_auth_len);
++	if (ahp->key_auth_len % 4) {
++		memset(extkey + ahp->key_auth_len, 0,
++		       4 - (ahp->key_auth_len % 4));
++	}
++	key_up4 = ((ahp->key_auth_len + 0x3) & 0xFFFFFFFC) / 4;
++
++	for (i = 0; i < key_up4; i++)
++		((uint32_t *) extkey)[i] = ((uint32_t *) extkey)[i] ^ opad;
++	for (i = key_up4; i < 16; i++)
++		((uint32_t *) extkey)[i] = opad;
++
++	sha1_compute((SHA1_CTX *) ahp->context, extkey, 64);
++	sha1_compute((SHA1_CTX *) ahp->context, inner,
++		     HMAC_SHA1_HASH_LEN);
++
++	sha1_final((SHA1_CTX *) ahp->context, digest);
++
++	kfree(ahp->context);
++}
++
++void md5_init(MD5_CTX * ctx)
++{
++	ctx->A = 0x67452301;
++	ctx->B = 0xefcdab89;
++	ctx->C = 0x98badcfe;
++	ctx->D = 0x10325476;
++	ctx->buf_cur = ctx->buf;
++	ctx->bitlen[0] = ctx->bitlen[1] = 0;
++	memset(ctx->buf, 0, 64);
++}
++
++void md5_over_block(MD5_CTX * ctx, uint8_t * data)
++{
++	uint32_t M[16];
++	uint32_t a = ctx->A;
++	uint32_t b = ctx->B;
++	uint32_t c = ctx->C;
++	uint32_t d = ctx->D;
++
++	create_M_blocks(M, data);
++
++	/* Round 1 */
++	FF(a, b, c, d, M[0], s11, 0xd76aa478);	/*  1 */
++	FF(d, a, b, c, M[1], s12, 0xe8c7b756);	/*  2 */
++	FF(c, d, a, b, M[2], s13, 0x242070db);	/*  3 */
++	FF(b, c, d, a, M[3], s14, 0xc1bdceee);	/*  4 */
++	FF(a, b, c, d, M[4], s11, 0xf57c0faf);	/*  5 */
++	FF(d, a, b, c, M[5], s12, 0x4787c62a);	/*  6 */
++	FF(c, d, a, b, M[6], s13, 0xa8304613);	/*  7 */
++	FF(b, c, d, a, M[7], s14, 0xfd469501);	/*  8 */
++	FF(a, b, c, d, M[8], s11, 0x698098d8);	/*  9 */
++	FF(d, a, b, c, M[9], s12, 0x8b44f7af);	/* 10 */
++	FF(c, d, a, b, M[10], s13, 0xffff5bb1);	/* 11 */
++	FF(b, c, d, a, M[11], s14, 0x895cd7be);	/* 12 */
++	FF(a, b, c, d, M[12], s11, 0x6b901122);	/* 13 */
++	FF(d, a, b, c, M[13], s12, 0xfd987193);	/* 14 */
++	FF(c, d, a, b, M[14], s13, 0xa679438e);	/* 15 */
++	FF(b, c, d, a, M[15], s14, 0x49b40821);	/* 16 */
++
++	/* Round 2 */
++	GG(a, b, c, d, M[1], s21, 0xf61e2562);	/* 17 */
++	GG(d, a, b, c, M[6], s22, 0xc040b340);	/* 18 */
++	GG(c, d, a, b, M[11], s23, 0x265e5a51);	/* 19 */
++	GG(b, c, d, a, M[0], s24, 0xe9b6c7aa);	/* 20 */
++	GG(a, b, c, d, M[5], s21, 0xd62f105d);	/* 21 */
++	GG(d, a, b, c, M[10], s22, 0x02441453);	/* 22 */
++	GG(c, d, a, b, M[15], s23, 0xd8a1e681);	/* 23 */
++	GG(b, c, d, a, M[4], s24, 0xe7d3fbc8);	/* 24 */
++	GG(a, b, c, d, M[9], s21, 0x21e1cde6);	/* 25 */
++	GG(d, a, b, c, M[14], s22, 0xc33707d6);	/* 26 */
++	GG(c, d, a, b, M[3], s23, 0xf4d50d87);	/* 27 */
++	GG(b, c, d, a, M[8], s24, 0x455a14ed);	/* 28 */
++	GG(a, b, c, d, M[13], s21, 0xa9e3e905);	/* 29 */
++	GG(d, a, b, c, M[2], s22, 0xfcefa3f8);	/* 30 */
++	GG(c, d, a, b, M[7], s23, 0x676f02d9);	/* 31 */
++	GG(b, c, d, a, M[12], s24, 0x8d2a4c8a);	/* 32 */
++
++	/* Round 3 */
++	HH(a, b, c, d, M[5], s31, 0xfffa3942);	/* 33 */
++	HH(d, a, b, c, M[8], s32, 0x8771f681);	/* 34 */
++	HH(c, d, a, b, M[11], s33, 0x6d9d6122);	/* 35 */
++	HH(b, c, d, a, M[14], s34, 0xfde5380c);	/* 36 */
++	HH(a, b, c, d, M[1], s31, 0xa4beea44);	/* 37 */
++	HH(d, a, b, c, M[4], s32, 0x4bdecfa9);	/* 38 */
++	HH(c, d, a, b, M[7], s33, 0xf6bb4b60);	/* 39 */
++	HH(b, c, d, a, M[10], s34, 0xbebfbc70);	/* 40 */
++	HH(a, b, c, d, M[13], s31, 0x289b7ec6);	/* 41 */
++	HH(d, a, b, c, M[0], s32, 0xeaa127fa);	/* 42 */
++	HH(c, d, a, b, M[3], s33, 0xd4ef3085);	/* 43 */
++	HH(b, c, d, a, M[6], s34, 0x4881d05);	/* 44 */
++	HH(a, b, c, d, M[9], s31, 0xd9d4d039);	/* 45 */
++	HH(d, a, b, c, M[12], s32, 0xe6db99e5);	/* 46 */
++	HH(c, d, a, b, M[15], s33, 0x1fa27cf8);	/* 47 */
++	HH(b, c, d, a, M[2], s34, 0xc4ac5665);	/* 48 */
++
++	/* Round 4 */
++	II(a, b, c, d, M[0], s41, 0xf4292244);	/* 49 */
++	II(d, a, b, c, M[7], s42, 0x432aff97);	/* 50 */
++	II(c, d, a, b, M[14], s43, 0xab9423a7);	/* 51 */
++	II(b, c, d, a, M[5], s44, 0xfc93a039);	/* 52 */
++	II(a, b, c, d, M[12], s41, 0x655b59c3);	/* 53 */
++	II(d, a, b, c, M[3], s42, 0x8f0ccc92);	/* 54 */
++	II(c, d, a, b, M[10], s43, 0xffeff47d);	/* 55 */
++	II(b, c, d, a, M[1], s44, 0x85845dd1);	/* 56 */
++	II(a, b, c, d, M[8], s41, 0x6fa87e4f);	/* 57 */
++	II(d, a, b, c, M[15], s42, 0xfe2ce6e0);	/* 58 */
++	II(c, d, a, b, M[6], s43, 0xa3014314);	/* 59 */
++	II(b, c, d, a, M[13], s44, 0x4e0811a1);	/* 60 */
++	II(a, b, c, d, M[4], s41, 0xf7537e82);	/* 61 */
++	II(d, a, b, c, M[11], s42, 0xbd3af235);	/* 62 */
++	II(c, d, a, b, M[2], s43, 0x2ad7d2bb);	/* 63 */
++	II(b, c, d, a, M[9], s44, 0xeb86d391);	/* 64 */
++
++	ctx->A += a;
++	ctx->B += b;
++	ctx->C += c;
++	ctx->D += d;
++}
++
++void create_M_blocks(uint32_t * M, uint8_t * data)
++{
++#ifdef HAVE_LITTLE_ENDIAN
++	memcpy((uint8_t *) M, data, 64);
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++#ifdef HAVE_BIG_ENDIAN
++	int i;
++	for (i = 0; i < 16; i++, data += 4) {
++		((uint8_t *) (&M[i]))[0] = data[3];
++		((uint8_t *) (&M[i]))[1] = data[2];
++		((uint8_t *) (&M[i]))[2] = data[1];
++		((uint8_t *) (&M[i]))[3] = data[0];
++	}
++#endif				/* HAVE_BIG_ENDIAN */
++}
++
++void md5_compute(MD5_CTX * ctx, uint8_t * data, uint32_t len)
++{
++	uint8_t pos = ((ctx->bitlen[0] >> 3) & 0x3f);
++
++	/* First we update the bit length */
++	if ((ctx->bitlen[0] += (len << 3)) < (len << 3))
++		ctx->bitlen[1]++;
++	ctx->bitlen[1] += (len >> 29);	/* len is expressed in bytes */
++
++	if (pos) {
++		/* Buffer is not empty */
++		if (64 - pos >= len) {
++			memcpy(ctx->buf_cur, data, len);
++			ctx->buf_cur += len;
++			pos += len;
++			if (pos == 64) {
++				/* The current block is over */
++				md5_over_block(ctx, ctx->buf);
++				ctx->buf_cur = ctx->buf;
++			}
++			return;
++		} else {
++			memcpy(ctx->buf_cur, data, 64 - pos);
++			md5_over_block(ctx, ctx->buf);
++			len -= (64 - pos);
++			data += (64 - pos);
++			ctx->buf_cur = ctx->buf;
++		}
++	}
++	while (len >= 64) {
++		md5_over_block(ctx, data);
++		len -= 64;
++		data += 64;
++	}
++	if (len) {
++		memcpy(ctx->buf_cur, data, len);
++		ctx->buf_cur += len;
++	}
++}
++
++void md5_final(MD5_CTX * ctx, uint8_t * digest)
++{
++	uint32_t rem_size;
++	uint8_t *buf_cur = ctx->buf_cur;
++	int i;
++
++	rem_size = 64 - ((ctx->bitlen[0] >> 3) & 0x3f);
++	*(buf_cur++) = 0x80;
++
++	if (rem_size > 8 + 1) {
++		/* We have enough room in the current block */
++		for (i = 0; i < rem_size - 8 - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++	} else {
++		/* We do not have enough room and need therefore to add a new
++		   64-byte block */
++		for (i = 0; i < rem_size - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++		md5_over_block(ctx, ctx->buf);
++
++		buf_cur = ctx->buf;
++		for (i = 0; i < 64 - 8; i++) {
++			*(buf_cur++) = 0;
++		}
++	}
++#ifdef HAVE_LITTLE_ENDIAN
++	memcpy(buf_cur, (uint8_t *) ctx->bitlen, 8);
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++#ifdef HAVE_BIG_ENDIAN
++	*(buf_cur++) = (ctx->bitlen[0] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 0) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 0) & 0xff;
++#endif				/* HAVE_BIG_ENDIAN */
++
++	md5_over_block(ctx, ctx->buf);
++
++#ifdef HAVE_LITTLE_ENDIAN
++	memcpy(digest + 0, (uint8_t *) (&(ctx->A)), sizeof(uint32_t));
++	memcpy(digest + 4, (uint8_t *) (&(ctx->B)), sizeof(uint32_t));
++	memcpy(digest + 8, (uint8_t *) (&(ctx->C)), sizeof(uint32_t));
++	memcpy(digest + 12, (uint8_t *) (&(ctx->D)), sizeof(uint32_t));
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++#ifdef HAVE_BIG_ENDIAN
++	digest[0] = ((ctx->A) >> 24) & 0xff;
++	digest[1] = ((ctx->A) >> 16) & 0xff;
++	digest[2] = ((ctx->A) >> 8) & 0xff;
++	digest[3] = ((ctx->A) >> 0) & 0xff;
++	digest[4] = ((ctx->B) >> 24) & 0xff;
++	digest[5] = ((ctx->B) >> 16) & 0xff;
++	digest[6] = ((ctx->B) >> 8) & 0xff;
++	digest[7] = ((ctx->B) >> 0) & 0xff;
++	digest[8] = ((ctx->C) >> 24) & 0xff;
++	digest[9] = ((ctx->C) >> 16) & 0xff;
++	digest[10] = ((ctx->C) >> 8) & 0xff;
++	digest[11] = ((ctx->C) >> 0) & 0xff;
++	digest[12] = ((ctx->D) >> 24) & 0xff;
++	digest[13] = ((ctx->D) >> 16) & 0xff;
++	digest[14] = ((ctx->D) >> 8) & 0xff;
++	digest[15] = ((ctx->D) >> 0) & 0xff;
++#endif				/* HAVE_BIG_ENDIAN */
++}
++
++void sha1_init(SHA1_CTX * ctx)
++{
++	ctx->A = 0x67452301;
++	ctx->B = 0xefcdab89;
++	ctx->C = 0x98badcfe;
++	ctx->D = 0x10325476;
++	ctx->E = 0xc3d2e1f0;
++	ctx->buf_cur = ctx->buf;
++	ctx->bitlen[0] = ctx->bitlen[1] = 0;
++	memset(ctx->buf, 0, 64);
++}
++
++void sha1_over_block(SHA1_CTX * ctx, uint8_t * data)
++{
++	int i;
++	uint32_t W[80];
++	uint32_t a = ctx->A;
++	uint32_t b = ctx->B;
++	uint32_t c = ctx->C;
++	uint32_t d = ctx->D;
++	uint32_t e = ctx->E;
++	uint32_t temp;
++
++	create_W_blocks(W, data);
++
++	/* Round 1 */
++	for (i = 0; i < 20; i++) {
++		temp = LROLL(a, 5) + f(b, c, d) + e + W[i] + K1;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	/* Round 2 */
++	for (i = 20; i < 40; i++) {
++		temp = LROLL(a, 5) + h(b, c, d) + e + W[i] + K2;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	/* Round 3 */
++	for (i = 40; i < 60; i++) {
++		temp = LROLL(a, 5) + g(b, c, d) + e + W[i] + K3;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	/* Round 4 */
++	for (i = 60; i < 80; i++) {
++		temp = LROLL(a, 5) + h(b, c, d) + e + W[i] + K4;
++		e = d;
++		d = c;
++		c = LROLL(b, 30);
++		b = a;
++		a = temp;
++	}
++
++	ctx->A += a;
++	ctx->B += b;
++	ctx->C += c;
++	ctx->D += d;
++	ctx->E += e;
++}
++
++void create_W_blocks(uint32_t * W, uint8_t * data)
++{
++	int i;
++
++#ifdef HAVE_BIG_ENDIAN
++	memcpy((uint8_t *) W, data, 64);
++#endif				/* HAVE_BIG_ENDIAN */
++
++#ifdef HAVE_LITTLE_ENDIAN
++	for (i = 0; i < 16; i++, data += 4) {
++		((uint8_t *) (&W[i]))[0] = data[3];
++		((uint8_t *) (&W[i]))[1] = data[2];
++		((uint8_t *) (&W[i]))[2] = data[1];
++		((uint8_t *) (&W[i]))[3] = data[0];
++	}
++#endif				/* HAVE_LITTLE_ENDIAN */
++	for (i = 16; i < 80; i++) {
++		W[i] = W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16];
++		W[i] = LROLL(W[i], 1);
++	}
++}
++
++void sha1_compute(SHA1_CTX * ctx, uint8_t * data, uint32_t len)
++{
++	uint8_t pos = ((ctx->bitlen[0] >> 3) & 0x3f);
++
++	/* First we update the bit length */
++	if ((ctx->bitlen[0] += (len << 3)) < (len << 3))
++		ctx->bitlen[1]++;
++	ctx->bitlen[1] += (len >> 29);	/* len is expressed in bytes */
++
++	if (pos) {
++		/* Buffer is not empty */
++		if (64 - pos >= len) {
++			memcpy(ctx->buf_cur, data, len);
++			ctx->buf_cur += len;
++			pos += len;
++			if (pos == 64) {
++				/* The current block is over */
++				sha1_over_block(ctx, ctx->buf);
++				ctx->buf_cur = ctx->buf;
++			}
++			return;
++		} else {
++			memcpy(ctx->buf_cur, data, 64 - pos);
++			sha1_over_block(ctx, ctx->buf);
++			len -= (64 - pos);
++			data += (64 - pos);
++			ctx->buf_cur = ctx->buf;
++		}
++	}
++	while (len >= 64) {
++		sha1_over_block(ctx, data);
++		len -= 64;
++		data += 64;
++	}
++	if (len) {
++		memcpy(ctx->buf_cur, data, len);
++		ctx->buf_cur += len;
++	}
++}
++
++void sha1_final(SHA1_CTX * ctx, uint8_t * digest)
++{
++	uint32_t rem_size;
++	uint8_t *buf_cur = ctx->buf_cur;
++	int i;
++
++	rem_size = 64 - ((ctx->bitlen[0] >> 3) & 0x3f);
++	*(buf_cur++) = 0x80;
++
++	if (rem_size > 8 + 1) {
++		/* We have enough room in the current block */
++		for (i = 0; i < rem_size - 8 - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++	} else {
++		/* We do not have enough room and need therefore to add a new
++		   64-byte block */
++		for (i = 0; i < rem_size - 1; i++) {
++			*(buf_cur++) = 0;
++		}
++		sha1_over_block(ctx, ctx->buf);
++
++		buf_cur = ctx->buf;
++		for (i = 0; i < 64 - 8; i++) {
++			*(buf_cur++) = 0;
++		}
++	}
++#ifdef HAVE_BIG_ENDIAN
++	memcpy(buf_cur, (uint8_t *) ctx->bitlen, 8);
++#endif				/* HAVE_BIG_ENDIAN */
++
++#ifdef HAVE_LITTLE_ENDIAN
++	*(buf_cur++) = (ctx->bitlen[1] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[1] >> 0) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 24) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 16) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 8) & 0xff;
++	*(buf_cur++) = (ctx->bitlen[0] >> 0) & 0xff;
++#endif				/* HAVE_LITTLE_ENDIAN */
++
++	sha1_over_block(ctx, ctx->buf);
++
++#ifdef HAVE_BIG_ENDIAN
++	memcpy(digest + 0, (uint8_t *) (&(ctx->A)), sizeof(uint32_t));
++	memcpy(digest + 4, (uint8_t *) (&(ctx->B)), sizeof(uint32_t));
++	memcpy(digest + 8, (uint8_t *) (&(ctx->C)), sizeof(uint32_t));
++	memcpy(digest + 12, (uint8_t *) (&(ctx->D)), sizeof(uint32_t));
++	memcpy(digest + 16, (uint8_t *) (&(ctx->E)), sizeof(uint32_t));
++#endif				/* HAVE_BIG_ENDIAN */
++
++#ifdef HAVE_LITTLE_ENDIAN
++	digest[0] = ((ctx->A) >> 24) & 0xff;
++	digest[1] = ((ctx->A) >> 16) & 0xff;
++	digest[2] = ((ctx->A) >> 8) & 0xff;
++	digest[3] = ((ctx->A) >> 0) & 0xff;
++	digest[4] = ((ctx->B) >> 24) & 0xff;
++	digest[5] = ((ctx->B) >> 16) & 0xff;
++	digest[6] = ((ctx->B) >> 8) & 0xff;
++	digest[7] = ((ctx->B) >> 0) & 0xff;
++	digest[8] = ((ctx->C) >> 24) & 0xff;
++	digest[9] = ((ctx->C) >> 16) & 0xff;
++	digest[10] = ((ctx->C) >> 8) & 0xff;
++	digest[11] = ((ctx->C) >> 0) & 0xff;
++	digest[12] = ((ctx->D) >> 24) & 0xff;
++	digest[13] = ((ctx->D) >> 16) & 0xff;
++	digest[14] = ((ctx->D) >> 8) & 0xff;
++	digest[15] = ((ctx->D) >> 0) & 0xff;
++	digest[16] = ((ctx->E) >> 24) & 0xff;
++	digest[17] = ((ctx->E) >> 16) & 0xff;
++	digest[18] = ((ctx->E) >> 8) & 0xff;
++	digest[19] = ((ctx->E) >> 0) & 0xff;
++#endif				/* HAVE_LITTLE_ENDIAN */
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/hmac.h
+@@ -0,0 +1,94 @@
++/*
++ *      MIPL Mobile IPv6 Message authentication algorithms        
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _HMAC_H
++#define _HMAC_H
++
++#include <linux/types.h>
++#include <linux/in6.h>
++
++#define HAVE_LITTLE_ENDIAN
++
++#define NO_EXPIRY 1  /* For sec_as */
++
++#define ALG_AUTH_NONE           0
++#define ALG_AUTH_HMAC_MD5       1
++#define ALG_AUTH_HMAC_SHA1      2
++
++struct sec_as;
++struct ah_processing {
++	void *context;
++	struct sec_as *sas;
++	u_int8_t *key_auth;
++	u_int32_t key_auth_len;
++};
++
++struct antireplay {
++	u_int32_t count;
++	u_int32_t bitmap; 
++};
++
++typedef struct {
++  u_int32_t A, B, C, D;
++  u_int32_t bitlen[2];
++  u_int8_t* buf_cur;
++  u_int8_t buf[64];
++} MD5_CTX;
++
++typedef struct {
++  u_int32_t A, B, C, D, E;
++  u_int32_t bitlen[2];
++  u_int8_t* buf_cur;
++  u_int8_t buf[64];
++} SHA1_CTX;
++
++
++
++int ah_hmac_md5_init (struct ah_processing *ahp, u_int8_t *key, u_int32_t key_len);
++void ah_hmac_md5_loop(struct ah_processing*, void*, u_int32_t);
++void ah_hmac_md5_result(struct ah_processing*, char*);
++int ah_hmac_sha1_init(struct ah_processing*, u_int8_t *key, u_int32_t key_len);
++void ah_hmac_sha1_loop(struct ah_processing*, void*, u_int32_t);
++void ah_hmac_sha1_result(struct ah_processing*, char*);
++
++
++#define AH_HDR_LEN 12   /* # of bytes for Next Header, Payload Length,
++                           RESERVED, Security Parameters Index and
++
++                           Sequence Number Field */
++
++void md5_init(MD5_CTX *ctx);
++void md5_over_block(MD5_CTX *ctx, u_int8_t* data);
++void create_M_blocks(u_int32_t* M, u_int8_t* data);
++void md5_compute(MD5_CTX *ctx, u_int8_t* data, u_int32_t len);
++void md5_final(MD5_CTX *ctx, u_int8_t* digest);
++
++void sha1_init(SHA1_CTX *ctx);
++void sha1_over_block(SHA1_CTX *ctx, u_int8_t* data);
++void create_W_blocks(u_int32_t* W, u_int8_t* data);
++void sha1_compute(SHA1_CTX *ctx, u_int8_t* data, u_int32_t len);
++void sha1_final(SHA1_CTX *ctx, u_int8_t* digest);
++
++struct mipv6_acq {
++	struct in6_addr coa;
++	struct in6_addr haddr;
++	struct in6_addr peer;
++	u_int32_t spi;
++};
++#define MIPV6_MAX_AUTH_DATA 20
++
++#define HMAC_MD5_HASH_LEN   16
++#define HMAC_SHA1_HASH_LEN  20
++#define HMAC_SHA1_KEY_SIZE  20
++#define HMAC_MD5_ICV_LEN   12 /* RFC 2403 */
++#define HMAC_SHA1_ICV_LEN  12 /* RFC 2404 */
++
++#endif /* _HMAC_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/ioctl_mn.c
+@@ -0,0 +1,142 @@
++/*
++ *	Mobile Node IOCTL Control device
++ *
++ *	Authors:
++ *	Henrik Petander		<lpetande@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/fs.h>
++#include <linux/poll.h>
++#include <linux/ioctl.h> 
++#include <net/ipv6.h>
++#include <asm/uaccess.h>
++
++#include "debug.h"
++#include "mdetect.h"
++#include "multiaccess_ctl.h"
++
++/* Reserved for local / experimental use */
++#define MAJOR_NUM 0xf9
++
++/* Get Care-of address information for Mobile Node */
++#define IOCTL_GET_CAREOFADDR _IOWR(MAJOR_NUM, 9, void *)
++
++#define MA_IOCTL_SET_IFACE_PREFERENCE _IOR (MAJOR_NUM, 13, void *)
++
++/* The name of the device file */
++#define CTLFILE "mipv6_dev"
++
++static int inuse = 0;
++
++static int mipv6_open(struct inode *inode, struct file *file)
++{
++	DEBUG(DBG_INFO, "(%p)\n", file);
++
++	if (inuse)
++		return -EBUSY;
++
++	inuse++;
++
++	MOD_INC_USE_COUNT;
++
++	return 0;
++}
++
++static int mipv6_close(struct inode *inode, struct file *file)
++{
++	DEBUG(DBG_INFO, "(%p,%p)\n", inode, file);
++	inuse--;
++
++	MOD_DEC_USE_COUNT;
++
++	return 0;
++}
++
++int mipv6_ioctl(struct inode *inode, struct file *file, 
++		unsigned int ioctl_num,	/* The number of the ioctl */
++		unsigned long arg)	/* The parameter to it */
++{
++	struct in6_addr careofaddr;
++
++	/* Switch according to the ioctl called */
++	switch (ioctl_num) {
++	case IOCTL_GET_CAREOFADDR:
++		DEBUG(DBG_DATADUMP, "IOCTL_GET_CAREOFADDR");
++		/* First get home address from user and then look up 
++		 * the care-of address and return it
++		 */
++		if (copy_from_user(&careofaddr, (struct in6_addr *)arg, 
++				   sizeof(struct in6_addr)) < 0) {
++			DEBUG(DBG_WARNING, "Copy from user failed");
++			return -EFAULT;
++		}
++		mipv6_get_care_of_address(&careofaddr, &careofaddr);
++		if (copy_to_user((struct in6_addr *)arg, &careofaddr,
++				 sizeof(struct in6_addr)) < 0) {
++			DEBUG(DBG_WARNING, "copy_to_user failed");
++			return -EFAULT;
++		}
++		break;
++	case MA_IOCTL_SET_IFACE_PREFERENCE:
++		DEBUG(DBG_INFO, "MA_IOCTL_SET_IFACE_PREFERENCE");
++		ma_ctl_set_preference(arg);
++		break;
++
++	default:
++		DEBUG(DBG_WARNING, "Unknown ioctl cmd (%d)", ioctl_num);
++		return -ENOENT;
++	}
++	return 0;
++}
++
++struct file_operations Fops = {
++	owner: THIS_MODULE,
++	read: NULL,
++	write: NULL,
++	poll: NULL,
++	ioctl: mipv6_ioctl,
++	open: mipv6_open,
++	release: mipv6_close
++};
++
++
++/* Initialize the module - Register the character device */
++int mipv6_ioctl_mn_init(void)
++{
++	int ret_val;
++
++	/* Register the character device (atleast try) */
++	ret_val = register_chrdev(MAJOR_NUM, CTLFILE, &Fops);
++
++	/* Negative values signify an error */
++	if (ret_val < 0) {
++		DEBUG(DBG_ERROR, "failed registering char device (err=%d)",
++		      ret_val);
++		return ret_val;
++	}
++
++	DEBUG(DBG_INFO, "Device number %x, success", MAJOR_NUM);
++	return 0;
++}
++
++
++/* Cleanup - unregister the appropriate file from /proc */
++void mipv6_ioctl_mn_exit(void)
++{
++	int ret;
++	/* Unregister the device */
++	ret = unregister_chrdev(MAJOR_NUM, CTLFILE);
++
++	/* If there's an error, report it */
++	if (ret < 0)
++		DEBUG(DBG_ERROR, "errorcode: %d\n", ret);
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mdetect.c
+@@ -0,0 +1,1153 @@
++/*
++ *      Movement Detection Module
++ *
++ *      Authors:
++ *      Henrik Petander                <lpetande@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ *      Handles the L3 movement detection of mobile node and also
++ *      changing of its routes.
++ *  
++ */
++
++/*
++ *	Changes:
++ *
++ *	Nanno Langstraat	:	Locking fixes
++ *      Venkata Jagana          :       Locking fix
++ */
++
++#include <linux/autoconf.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/if_arp.h>
++#include <linux/route.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipglue.h>
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include "util.h"
++#include "mdetect.h"
++#include "mn.h"
++#include "debug.h"
++#include "multiaccess_ctl.h"
++
++#define START 0
++#define CONTINUE 1
++#define OK 2
++#define DEBUG_MDETECT 7
++
++#define DEF_RTR_POLL_IVAL 5 /* In seconds */
++
++#define NO_RTR 0
++#define RTR_SUSPECT 1
++#define CURR_RTR_OK 2
++
++#define RA_RCVD 0
++#define NA_RCVD 1
++#define TIMEOUT 2
++
++#define MIPV6_MDF_NONE 0x0
++#define MIPV6_MDF_HAS_RTR_PREV 0x1
++
++#define ROUTER_REACHABLE 1
++#define RADV_MISSED 2
++#define NOT_REACHABLE 3
++
++/* R_TIME_OUT paramater is used to make the decision when to change the 
++ * default  router, if the current one is unreachable. 2s is pretty aggressive 
++ * and may result in hopping between two routers. OTOH a small value enhances 
++ * the  performance
++ */
++#define R_TIME_OUT 30*HZ
++
++/* maximum RA interval for router unreachability detection */
++#define MAX_RADV_INTERVAL 6*HZ  /* 6000 ms... */
++
++/* Threshold for exponential resending of router solicitations */
++#define RS_RESEND_LINEAR 10*HZ
++
++#define EAGER_CELL_SWITCHING 1
++#define LAZY_CELL_SWITCHING 0
++#define RESPECT_DAD 1
++
++#define ROUTER_ADDRESS 0x20
++
++/* RA flags */
++#define ND_RA_FLAG_MANAGED  0x80
++#define ND_RA_FLAG_OTHER    0x40
++#define ND_RA_FLAG_HA       0x20
++
++/* DAD flags for global and link local addresses */
++
++#define COA_TENTATIVE       0x10
++#define LLADDR_TENTATIVE    0x01
++
++struct router {
++	struct list_head list;
++	struct in6_addr ll_addr;
++	struct in6_addr raddr; /* Also contains prefix */
++	__u8 link_addr[MAX_ADDR_LEN]; /* link layer address */
++	__u8 link_addr_len;
++	__u8 state;
++	__u8 is_current;
++	__u8 reachable;
++	int ifindex;
++	int pfix_len; /* Length of the network prefix */
++	unsigned long lifetime; /* from ra */
++	__u32 last_ns_sent; 
++	__u32 last_ra_rcvd;
++	__u32 interval; /* ra interval in milliseconds, 0 if not set */ 
++	int glob_addr; /*Whether raddr contains also routers global address*/
++	__u8 flags; /* RA flags, for example ha */
++        struct in6_addr CoA;     /* care-off address used with this router */
++	int extra_addr_route;
++};
++
++/* dad could also be RESPECT_DAD for duplicate address detection of
++   new care-of addresses */
++static int dad = 0;
++
++/* Only one choice, nothing else implemented */
++int max_rtr_reach_time = DEF_RTR_POLL_IVAL;
++
++
++int eager_cell_switching = EAGER_CELL_SWITCHING; /* Can be set to 0 via proc */  
++static spinlock_t router_lock; 
++static spinlock_t ho_lock;
++
++static void coa_timer_handler(unsigned long arg);
++static void timer_handler(unsigned long foo);
++static struct router *curr_router = NULL, *next_router = NULL;
++static struct timer_list r_timer = { function: timer_handler };
++static struct timer_list coa_timer = { function: coa_timer_handler };
++#define MAX_ROUTERS 1000
++static LIST_HEAD(rtr_list);
++static int num_routers = 0;
++static struct handoff *_ho = NULL;
++/*
++ * Functions for handling the default router list, which movement
++ * detection uses for avoiding loops etc.
++ */
++
++/* TODO: Send NS to router after MAX interval has passed from last RA */
++static int mipv6_router_state(struct router *rtr) {
++	if (rtr->interval) {
++		if (time_before(jiffies, (rtr->last_ra_rcvd + (rtr->interval * HZ) / 1000)))
++			return ROUTER_REACHABLE;
++		else
++			return NOT_REACHABLE;
++	}
++	else
++		if (time_after(jiffies, rtr->last_ra_rcvd + (rtr->lifetime * HZ)))
++			return NOT_REACHABLE;
++	return ROUTER_REACHABLE;
++}
++
++/* searches for a specific router or any router that is reachable, 
++ * if address is NULL. Also deletes obsolete routers.
++ */
++static void mipv6_router_gc(void)
++{
++	struct router *curr = NULL;
++	struct list_head *lh, *lh_tmp;
++
++	DEBUG_FUNC();
++
++	list_for_each_safe(lh, lh_tmp, &rtr_list) {
++		curr =  list_entry(lh, struct router, list);
++		if (mipv6_router_state(curr) == NOT_REACHABLE && !curr->is_current) {
++			num_routers--;
++			list_del_init(&curr->list);
++			DEBUG(DBG_DATADUMP, "Deleting unreachable router  %x:%x:%x:%x:%x:%x:%x:%x", 
++			      NIPV6ADDR(&curr->raddr));
++			kfree(curr);
++		}
++		else {
++			DEBUG(DBG_DATADUMP, "NOT Deleting router  %x:%x:%x:%x:%x:%x:%x:%x", 
++			      NIPV6ADDR(&curr->raddr));
++		}
++	}
++}
++
++static struct router *mipv6_rtr_get(struct in6_addr *search_addr)
++{
++	struct router *rtr = NULL;
++	struct list_head *lh;
++
++	DEBUG_FUNC();
++
++	if (search_addr == NULL)
++		return NULL;
++	list_for_each(lh, &rtr_list) {
++		rtr = list_entry(lh, struct router, list);
++		if(!ipv6_addr_cmp(search_addr, &rtr->raddr)) {
++			return rtr;
++		}
++	}
++	return NULL;
++}
++
++/*
++ * Adds router to list
++ */
++static struct router *mipv6_rtr_add(struct router *nrt)
++{
++
++	struct router *rptr;
++
++	DEBUG_FUNC();
++
++	/* check if someone is trying DoS attack, or we just have some
++           memory leaks... */
++	if (num_routers > MAX_ROUTERS) {
++		DEBUG(DBG_CRITICAL, 
++		      "failed to add new router, MAX_ROUTERS exceeded");
++		return NULL;
++	}
++	
++	rptr = kmalloc(sizeof(struct router), GFP_ATOMIC);
++	if (rptr) {
++		memcpy(rptr, nrt, sizeof(struct router));
++		list_add(&rptr->list, &rtr_list);
++		num_routers++;
++	}
++	DEBUG(DBG_INFO, "Adding router: %x:%x:%x:%x:%x:%x:%x:%x, "
++	      "lifetime : %d sec, adv.interval: %d millisec", 
++	      NIPV6ADDR(&rptr->raddr), rptr->lifetime, rptr->interval);
++
++	DEBUG(DBG_INFO, "num_routers after addition: %d", num_routers);
++	return rptr;
++}
++
++/* Cleans up the list */
++static void list_free(struct router **curr_router_p)
++{
++	struct router *tmp;
++	struct list_head *lh, *lh_tmp;
++
++	DEBUG_FUNC();
++
++	DEBUG(DBG_INFO, "Freeing the router list");
++	/* set curr_router->prev_router and curr_router NULL */
++	*curr_router_p = NULL;
++	list_for_each_safe(lh, lh_tmp, &rtr_list) {
++		tmp = list_entry(lh, struct router, list);
++		DEBUG(DBG_INFO, "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&tmp->ll_addr));
++		list_del(&tmp->list);
++		kfree(tmp);
++		num_routers--;
++	}
++}
++
++int rs_state = START;
++
++/* Sends router solicitations to all valid devices 
++ * source  = link local address (of sending interface)
++ * dstaddr = all routers multicast address
++ * Solicitations are sent at an exponentially decreasing rate
++ *
++ * TODO: send solicitation first at a normal rate (from ipv6) and
++ *       after that use the exponentially increasing intervals 
++ */
++static int rs_send(void)
++{
++	struct net_device *dev;
++	struct in6_addr raddr, lladdr;
++	struct inet6_dev *in6_dev = NULL;
++	static int num_rs;
++
++	if (rs_state == START) {
++		num_rs = 0;
++		rs_state = CONTINUE;
++	} else if (num_rs++ > MAX_RTR_SOLICITATIONS)
++		return HZ;
++
++	ipv6_addr_all_routers(&raddr);
++	read_lock(&dev_base_lock); 
++
++	/*  Send router solicitations to all interfaces  */
++	for (dev = dev_base; dev; dev = dev->next) {
++		if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ETHER) {
++			DEBUG(DBG_DATADUMP, "Sending RS to device %s", 
++			      dev->name);
++			if (!ipv6_get_lladdr(dev, &lladdr)) {
++				ndisc_send_rs(dev, &lladdr, &raddr);
++				in6_dev = in6_dev_get(dev);
++				in6_dev->if_flags |= IF_RS_SENT;
++				in6_dev_put(in6_dev);
++			} else {
++				DEBUG(DBG_DATADUMP, "%s: device doesn't have link-local address!\n", dev->name);
++				continue;
++			}
++		}
++		
++	}
++	read_unlock(&dev_base_lock);
++	return RTR_SOLICITATION_INTERVAL;
++}
++
++/* Create a new CoA for MN and also add a route to it if it is still tentative 
++   to allow MN to get packets to the address immediately
++ */
++static int form_coa(struct in6_addr *coa, struct in6_addr *pfix, 
++		    int plen, int ifindex)
++{
++	struct net_device *dev;
++	struct inet6_dev *in6_dev;
++	int ret = 0;
++
++	if ((dev = dev_get_by_index(ifindex)) == NULL) {
++		DEBUG(DBG_WARNING, "Device is not present");
++		return -1;
++	}
++	if ((in6_dev = in6_dev_get(dev)) == NULL) {
++		DEBUG(DBG_WARNING, "inet6_dev is not present");
++		dev_put(dev);
++		return -1;
++	}
++	coa->s6_addr32[0] = pfix->s6_addr32[0];
++	coa->s6_addr32[1] = pfix->s6_addr32[1];
++
++	if (ipv6_generate_eui64(coa->s6_addr + 8, dev) &&
++	    ipv6_inherit_eui64(coa->s6_addr + 8, in6_dev)) {
++		in6_dev_put(in6_dev);
++		dev_put(dev);
++		return -1;
++	}
++	if (ipv6_chk_addr(coa, dev) == 0) { 
++		DEBUG(DBG_WARNING, "care-of address still tentative");
++		ret = 1;
++	}
++	DEBUG(DBG_INFO, "Formed new CoA:  %x:%x:%x:%x:%x:%x:%x:%x",
++	      NIPV6ADDR(coa));
++	
++	in6_dev_put(in6_dev);
++	dev_put(dev);
++	return ret;
++}
++
++static inline int rtr_is_gw(struct router *rtr, struct rt6_info *rt) 
++{
++	return ((rt->rt6i_flags & RTF_GATEWAY) && 
++		!ipv6_addr_cmp(&rt->rt6i_gateway, &rtr->ll_addr));
++}
++
++static inline int is_prefix_route(struct router *rtr, struct rt6_info *rt) 
++{
++	return (!(rt->rt6i_flags & RTF_GATEWAY) &&
++		mipv6_prefix_compare(&rt->rt6i_dst.addr, &rtr->raddr, 
++				     rtr->pfix_len));
++}
++
++/*
++ * Function that determines whether given rt6_info should be destroyed
++ * (negative => destroy rt6_info, zero or positive => do nothing) 
++ */
++static int mn_route_cleaner(struct rt6_info *rt, void *arg)
++{
++	int type;
++
++	struct router *rtr = (struct router *)arg;
++
++	int ret = -1;
++
++	DEBUG_FUNC();
++	
++	if (!rt || !rtr) {
++		DEBUG(DBG_ERROR, "mn_route_cleaner: rt or rtr NULL");
++		return 0;
++	}
++
++	/* Do not delete routes to local addresses or to multicast
++	 * addresses, since we need them to get router advertisements
++	 * etc. Multicast addresses are more tricky, but we don't
++	 * delete them in any case. The routing mechanism is not optimal for 
++	 * multihoming.   
++	 *
++	 * Also keep all new prefix routes, gateway routes through rtr and
++	 * all remaining default routes (including those used for reverse
++	 * tunneling)
++	 */
++	type = ipv6_addr_type(&rt->rt6i_dst.addr);
++	
++	if ((type & (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL)) ||
++	    rt->rt6i_dev == &loopback_dev || rtr_is_gw(rtr, rt) ||
++	    is_prefix_route(rtr, rt) || (rt->rt6i_flags & RTF_DEFAULT))  
++		ret = 0;
++	
++	/*   delete all others */
++
++	if (rt->rt6i_dev != &loopback_dev) {
++		DEBUG(DEBUG_MDETECT, 
++		      "%s route:\n"
++		      "dev: %s,\n"
++		      "gw: %x:%x:%x:%x:%x:%x:%x:%x,\n"
++		      "flags: %x,\n"
++		      "metric: %d,\n"
++		      "src: %x:%x:%x:%x:%x:%x:%x:%x,\n"
++		      "dst: %x:%x:%x:%x:%x:%x:%x:%x,\n"
++		      "plen: %d\n",
++		      (ret ? "Deleting" : "Keeping"),
++		      rt->rt6i_dev->name,	       
++		      NIPV6ADDR(&rt->rt6i_gateway),	       
++		      rt->rt6i_flags,
++		      rt->rt6i_metric,
++		      NIPV6ADDR(&rt->rt6i_src.addr),
++		      NIPV6ADDR(&rt->rt6i_dst.addr),
++		      rt->rt6i_dst.plen);
++	}
++	return ret;
++}
++
++/* 
++ * Deletes old routes 
++ */
++static __inline__ void delete_routes(struct router *rtr)
++{
++	DEBUG_FUNC();
++
++	/* Routing table is locked to ensure that nobody uses its */  
++	write_lock_bh(&rt6_lock);
++	DEBUG(DBG_INFO, "mipv6: Purging routes");
++	/*  TODO: Does not prune, should it?  */
++	fib6_clean_tree(&ip6_routing_table, 
++			mn_route_cleaner, 0, rtr);
++	write_unlock_bh(&rt6_lock);
++
++}
++
++
++static __inline__ void delete_coas(struct router *rtr)
++{
++	struct net_device *dev;
++	struct inet6_dev *idev;
++	struct inet6_ifaddr *ifa;
++
++	dev = dev_get_by_index(rtr->ifindex);
++	if (!dev)
++		return;
++
++	idev = in6_dev_get(dev);
++	
++	if (idev) {
++		read_lock_bh(&idev->lock);
++		ifa = idev->addr_list;
++		while (ifa) {
++			int keep; 
++			spin_lock(&ifa->lock);
++			
++			keep = (ifa->flags&(IFA_F_PERMANENT|IFA_F_HOMEADDR) ||
++				!ipv6_addr_cmp(&ifa->addr, &rtr->CoA));
++			
++			spin_unlock(&ifa->lock);
++			
++			if (keep)
++				ifa = ifa->if_next;
++			else {
++				in6_ifa_hold(ifa);
++				read_unlock_bh(&idev->lock);
++				
++				ipv6_del_addr(ifa);
++				
++				read_lock_bh(&idev->lock);
++				ifa = idev->addr_list;
++			}
++		}
++		read_unlock_bh(&idev->lock);
++		in6_dev_put(idev);
++	}
++	dev_put(dev);
++}
++
++int next_mdet_state[3][3] = {{CURR_RTR_OK, NO_RTR, NO_RTR},
++			     {CURR_RTR_OK, CURR_RTR_OK, NO_RTR},
++			     {CURR_RTR_OK, CURR_RTR_OK, RTR_SUSPECT}};
++ 
++char *states[3] = {"NO_RTR", "RTR_SUSPECT", "CURR_RTR_OK"};
++char *events[3] = {"RA_RCVD", "NA_RCVD", "TIMEOUT"};
++
++/* State transitions
++ * NO_RTR, RA_RCVD -> CURR_RTR_OK
++ * NO_RTR, NA_RCVD -> NO_RTR
++ * NO_RTR, TIMEOUT -> NO_RTR
++
++ * RTR_SUSPECT, RA_RCVD -> CURR_RTR_OK
++ * RTR_SUSPECT, NA_RCVD -> CURR_RTR_OK
++ * RTR_SUSPECT, TIMEOUT -> NO_RTR
++
++ * CURR_RTR_OK, RA_RCVD -> CURR_RTR_OK
++ * CURR_RTR_OK, NA_RCVD -> CURR_RTR_OK
++ * CURR_RTR_OK, TIMEOUT -> RTR_SUSPECT
++ */
++static int _curr_state = NO_RTR;
++
++#if 0
++static int get_mdet_state(void){
++	int state;
++	spin_lock_bh(&router_lock); 
++	state = _curr_state;
++	spin_unlock_bh(&router_lock);
++	return state;
++}
++#endif
++
++/* Needs to be called with router_lock locked */
++static int mdet_statemachine(int event)
++{
++	
++	if (event > 2 || _curr_state > 2) {
++	       DEBUG(DBG_ERROR, "Got illegal event or curr_state");
++	       return -1;
++	}
++
++	DEBUG(DBG_DATADUMP, "Got event %s and curr_state is %s", 
++	      events[event], states[_curr_state]); 
++	
++	_curr_state = next_mdet_state[_curr_state][event];
++	DEBUG(DBG_DATADUMP, "Next state is %s", states[_curr_state]);
++	return _curr_state;
++}
++
++static void mipv6_do_ll_dad(int ifindex)
++{
++	struct net_device *dev = dev_get_by_index(ifindex);
++	if (dev) {
++		struct in6_addr lladdr;
++		struct inet6_ifaddr *ifa;
++		if (!ipv6_get_lladdr(dev, &lladdr) &&
++		    (ifa = ipv6_get_ifaddr(&lladdr, dev)) != NULL) {
++			spin_lock_bh(&ifa->lock);
++			if (!(ifa->flags & IFA_F_TENTATIVE)) {
++				ifa->flags |= IFA_F_TENTATIVE;
++				spin_unlock_bh(&ifa->lock);
++				addrconf_dad_start(ifa, 0);
++			} else
++				spin_unlock_bh(&ifa->lock);
++
++		}
++		dev_put(dev);
++	}
++}
++/* 
++ * Changes the router, called from ndisc.c if mipv6_router_event 
++ * returns true.
++ */
++
++static void mipv6_change_router(void)
++{
++	struct in6_addr coa;
++	int ret, ifindex;
++	
++	DEBUG_FUNC(); 
++
++	
++	if (next_router == NULL) 
++		return;
++	
++	spin_lock(&router_lock);
++
++
++	if (curr_router != NULL && 
++	    !ipv6_addr_cmp(&curr_router->ll_addr, &next_router->ll_addr)) {
++		DEBUG(DBG_INFO,"Trying to handoff from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&curr_router->ll_addr));
++		DEBUG(DBG_INFO,"Trying to handoff to: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(&next_router->ll_addr));
++		next_router = NULL; /* Let's not leave dangling pointers */
++		spin_unlock(&router_lock);
++		return;
++        }
++	ret = form_coa(&next_router->CoA, &next_router->raddr, 
++		       next_router->pfix_len, next_router->ifindex);
++	if (ret < 0) {
++		DEBUG(DBG_ERROR, "handoff: Creation of coa failed");
++		spin_unlock(&router_lock);
++		return;
++	} else if (ret > 0)
++		next_router->flags |= COA_TENTATIVE;
++
++	mdet_statemachine(RA_RCVD); /* TODO: What if DAD fails... */
++	if (next_router->interval)
++		mod_timer(&r_timer, jiffies + 
++			  (next_router->interval * HZ)/1000);
++	else
++		mod_timer(&r_timer, jiffies + max_rtr_reach_time * HZ);
++	
++
++	if (ret == 0) {
++		ipv6_addr_copy(&coa, &next_router->CoA);
++		ifindex = next_router->ifindex;
++		spin_unlock(&router_lock);
++		mipv6_mdet_finalize_ho(&coa, ifindex);
++		return;
++	}
++	spin_unlock(&router_lock);
++
++}
++static unsigned long ns_send(void)
++{
++	struct neighbour *neigh;
++	struct net_device *dev;
++	struct in6_addr *raddr;
++
++	DEBUG(DBG_DATADUMP, "Sending Neighbour solicitation to default router to verify its reachability");
++	if (!curr_router) 
++		return HZ;
++	if ((dev = dev_get_by_index(curr_router->ifindex)) == NULL)
++		return HZ;
++	if ((neigh = ndisc_get_neigh(dev, &curr_router->ll_addr)) == NULL) {
++		dev_put(dev);
++		return HZ;
++	}
++	if (curr_router->glob_addr)
++		raddr = &curr_router->raddr;
++	else 
++		raddr = &curr_router->ll_addr;
++
++	curr_router->last_ns_sent = jiffies;
++	ndisc_send_ns(dev, neigh, raddr, raddr, NULL);	
++
++	neigh_release(neigh);
++	dev_put(dev);
++	return HZ/5; /* Wait 200ms for a reply */
++}
++
++static int na_rcvd(void)
++{	
++	int neigh_ok = 0;
++	struct neighbour *neigh;
++	struct net_device *dev;
++
++	if (!curr_router) 
++		return 0;
++	if ((dev = dev_get_by_index(curr_router->ifindex)) == NULL)
++		return 0;
++	if ((neigh = ndisc_get_neigh(dev, &curr_router->ll_addr)) == NULL) {
++		dev_put(dev);
++		return 0;
++	}
++	if (neigh->flags & NTF_ROUTER && 
++	    (time_after(neigh->confirmed, curr_router->last_ns_sent) || 
++	     neigh->confirmed == curr_router->last_ns_sent)) {
++		neigh_ok = 1;
++		DEBUG(DBG_DATADUMP, "Mdetect event: NA rcvd from curr rtr");
++	} else
++		DEBUG(DBG_DATADUMP, "Mdetect event: NA NOT rcvd from curr rtr within time limit");
++	neigh_release(neigh);
++	dev_put(dev);
++	return neigh_ok;
++}
++
++static void coa_timer_handler(unsigned long dummy)
++{
++
++	spin_lock_bh(&ho_lock);
++	if (_ho) {
++		DEBUG(DBG_INFO, "Starting handoff after DAD");
++		mipv6_mobile_node_moved(_ho);
++		kfree(_ho);
++		_ho = NULL;
++	}
++	spin_unlock_bh(&ho_lock);
++}
++static void timer_handler(unsigned long foo)
++{
++	unsigned long timeout;
++	int state;
++	spin_lock_bh(&router_lock);
++	
++	if (_curr_state != NO_RTR)
++		rs_state = START;
++
++	if (_curr_state == RTR_SUSPECT && na_rcvd()) {
++		state = mdet_statemachine(NA_RCVD);
++		timeout = curr_router->interval ? curr_router->interval : max_rtr_reach_time * HZ;
++	} else { 
++		state =  mdet_statemachine(TIMEOUT);
++		if (state == NO_RTR)
++			timeout = rs_send();
++		else  /* RTR_SUSPECT */
++			timeout = ns_send();
++	}
++	if (!timeout)
++		timeout = HZ;
++
++	mipv6_router_gc();
++	mod_timer(&r_timer, jiffies + timeout);
++	spin_unlock_bh(&router_lock);
++}
++
++/**
++ * mipv6_get_care_of_address - get node's care-of primary address
++ * @homeaddr: one of node's home addresses
++ * @coaddr: buffer to store care-of address
++ *
++ * Stores the current care-of address in the @coaddr, assumes
++ * addresses in EUI-64 format.  Since node might have several home
++ * addresses caller MUST supply @homeaddr.  If node is at home
++ * @homeaddr is stored in @coaddr.  Returns 0 on success, otherwise a
++ * negative value.
++ **/
++int mipv6_get_care_of_address(
++	struct in6_addr *homeaddr, struct in6_addr *coaddr)
++{
++	
++	DEBUG_FUNC();
++
++	if (homeaddr == NULL)
++		return -1;
++	spin_lock_bh(&router_lock);
++	if (curr_router == NULL || mipv6_mn_is_at_home(homeaddr) || 
++	    mipv6_prefix_compare(homeaddr, &curr_router->raddr, 64) || 
++	    curr_router->flags&COA_TENTATIVE) {
++		DEBUG(DBG_INFO,
++		      "mipv6_get_care_of_address: returning home address");
++		ipv6_addr_copy(coaddr, homeaddr);
++		spin_unlock_bh(&router_lock);
++		return 0;
++
++	}
++
++	/* At home or address check failure probably due to dad wait */
++	if (mipv6_prefix_compare(&curr_router->raddr, homeaddr, 
++				 curr_router->pfix_len) 
++				 || (dad == RESPECT_DAD && 
++				     (ipv6_chk_addr(coaddr, NULL) == 0))) { 
++		ipv6_addr_copy(coaddr, homeaddr);
++	} else { 
++		ipv6_addr_copy(coaddr, &curr_router->CoA);
++	}
++
++	spin_unlock_bh(&router_lock);
++	return 0;
++}
++
++int mipv6_mdet_del_if(int ifindex)
++{
++	struct router *curr = NULL;
++	struct list_head *lh, *lh_tmp;
++
++	spin_lock_bh(&router_lock);
++	list_for_each_safe(lh, lh_tmp, &rtr_list) {
++		curr =  list_entry(lh, struct router, list);
++		if (curr->ifindex == ifindex) {
++			num_routers--;
++			list_del_init(&curr->list);
++			DEBUG(DBG_DATADUMP, "Deleting router  %x:%x:%x:%x:%x:%x:%x:%x on interface %d", 
++			      NIPV6ADDR(&curr->raddr), ifindex);
++			if (curr_router == curr)
++				curr_router = NULL;
++			kfree(curr);
++		}
++	}
++	spin_unlock_bh(&router_lock);
++	return 0;
++}
++
++void mipv6_mdet_retrigger_ho(void)
++{
++	struct handoff ho;
++
++	spin_lock_bh(&router_lock);
++	if (curr_router != NULL) {
++		ho.coa = &curr_router->CoA;
++		ho.plen = curr_router->pfix_len;
++		ho.ifindex = curr_router->ifindex;
++		ipv6_addr_copy(&ho.rtr_addr, &curr_router->raddr);
++		ho.home_address = (curr_router->glob_addr && 
++				   curr_router->flags&ND_RA_FLAG_HA);
++	}
++	spin_unlock_bh(&router_lock);
++	mipv6_mobile_node_moved(&ho);
++}
++
++void mipv6_mdet_set_curr_rtr_reachable(int reachable)
++{
++	spin_lock_bh(&router_lock);
++	if (curr_router != NULL) {
++		curr_router->reachable = reachable;
++	}
++	spin_unlock_bh(&router_lock);
++
++}
++
++int mipv6_mdet_finalize_ho(const struct in6_addr *coa, const int ifindex)
++{
++	int dummy;
++	struct handoff ho;
++	struct router *tmp;
++	struct net_device *dev; 
++	struct in6_addr ll_addr;
++
++	spin_lock_bh(&router_lock);
++
++	if (!next_router) {
++		spin_unlock_bh(&router_lock);
++		return 0;
++	}
++
++	dev = dev_get_by_index(next_router->ifindex);
++
++	if (ipv6_get_lladdr(dev, &ll_addr) == 0) {
++		if (ipv6_addr_cmp(&ll_addr, coa) == 0)
++			DEBUG(DBG_INFO, "DAD for link local address completed");
++		next_router->flags &= ~LLADDR_TENTATIVE;
++	}
++
++	dev_put(dev);
++
++	if (mipv6_prefix_compare(coa, &next_router->CoA, 
++				 next_router->pfix_len)) {
++		DEBUG(DBG_INFO, "DAD for Care-of address completed");
++		next_router->flags &= ~COA_TENTATIVE;
++	}
++	if (!(next_router->flags&LLADDR_TENTATIVE) && !(next_router->flags&COA_TENTATIVE)) {
++		DEBUG(DBG_INFO, "%s: Proceeding with handoff after DAD\n", __FUNCTION__);
++		tmp = curr_router;
++		curr_router = next_router;
++		curr_router->is_current = 1;
++		next_router = NULL; 
++		curr_router->flags &= ~COA_TENTATIVE; 
++		delete_routes(curr_router);
++		delete_coas(curr_router);
++		if (tmp) {
++			struct net_device *dev_old = dev_get_by_index(tmp->ifindex);
++			struct rt6_info *rt = NULL;
++			if (dev_old) {
++				rt = rt6_get_dflt_router(&tmp->ll_addr, dev_old);
++				dev_put(dev_old);
++			}
++			if (rt)
++				ip6_del_rt(rt, NULL);
++			tmp->is_current = 0;
++		}
++
++		ma_ctl_upd_iface(curr_router->ifindex, MA_IFACE_CURRENT, &dummy);
++		ma_ctl_upd_iface(curr_router->ifindex, MA_IFACE_CURRENT, &dummy);
++
++
++		ho.coa = &curr_router->CoA;
++		ho.plen = curr_router->pfix_len;
++		ho.ifindex = curr_router->ifindex;
++		ipv6_addr_copy(&ho.rtr_addr, &curr_router->raddr);
++		ho.home_address = (curr_router->glob_addr && 
++				    curr_router->flags&ND_RA_FLAG_HA);
++		
++		spin_unlock_bh(&router_lock);
++		mipv6_mobile_node_moved(&ho);
++	} else 
++		spin_unlock_bh(&router_lock);
++	return 0;
++}
++/* Decides whether router candidate is the same router as current rtr
++ * based on prefix / global addresses of the routers and their link local 
++ * addresses 
++ */
++static int is_current_rtr(struct router *nrt, struct router *crt)
++{
++	DEBUG_FUNC();
++	
++	DEBUG(DEBUG_MDETECT, "Current router: "
++	      "%x:%x:%x:%x:%x:%x:%x:%x and", NIPV6ADDR(&crt->raddr));
++	DEBUG(DEBUG_MDETECT, "Candidate router: "
++	      "%x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(&nrt->raddr));
++
++	return (!ipv6_addr_cmp(&nrt->raddr,&crt->raddr) && 
++		!ipv6_addr_cmp(&nrt->ll_addr, &crt->ll_addr));
++}
++
++/* 
++ * Change next router to nrtr
++ * Returns 1, if router has been changed.
++ */ 
++
++static int change_next_rtr(struct router *nrtr, struct router *ortr)
++{
++	int changed = 0;
++	DEBUG_FUNC();
++
++	if (!next_router || ipv6_addr_cmp(&nrtr->raddr, &next_router->raddr)) {
++		changed = 1;
++	}
++	next_router = nrtr;
++	return changed;
++}
++static int clean_ncache(struct router *nrt, struct router *ort, int same_if)
++{
++	struct net_device *ortdev;
++	DEBUG_FUNC();
++
++	/* Always call ifdown after a handoff to ensure proper routing */
++	
++	if (!ort) 
++		return 0;
++	if ((ortdev = dev_get_by_index(ort->ifindex)) == NULL) {
++		DEBUG(DBG_WARNING, "Device is not present");
++		return -1;
++	}
++	neigh_ifdown(&nd_tbl, ortdev);
++	dev_put(ortdev);	
++	return 0;
++}
++
++static int mdet_get_if_preference(int ifi)
++{
++	int pref = 0;
++
++	DEBUG_FUNC();
++
++	pref = ma_ctl_get_preference(ifi);
++
++	DEBUG(DEBUG_MDETECT, "ifi: %d preference %d", ifi, pref);
++
++	return pref;
++}
++
++/*
++ * Called from mipv6_mn_ra_rcv to determine whether to do a handoff. 
++ */
++static int mipv6_router_event(struct router *rptr)
++{
++	struct router *nrt = NULL;
++	int new_router = 0, same_if = 1;
++	int oldstate = _curr_state;
++	int addrtype = ipv6_addr_type(&rptr->raddr);
++
++	DEBUG_FUNC();
++
++	if (rptr->lifetime == 0)
++		return MIPV6_IGN_RTR;
++	DEBUG(DEBUG_MDETECT, "Received a RA from router: "
++	      "%x:%x:%x:%x:%x:%x:%x:%x", NIPV6ADDR(&rptr->raddr));
++	spin_lock(&router_lock);
++	
++	/* Add or update router entry */
++	if ((nrt = mipv6_rtr_get(&rptr->raddr)) == NULL) {
++		if (addrtype == IPV6_ADDR_ANY || (nrt = mipv6_rtr_add(rptr)) == NULL) {
++				spin_unlock(&router_lock);
++				return MIPV6_IGN_RTR;
++		}
++		DEBUG(DBG_INFO, "Router not on list,adding it to the list"); 
++		new_router = 1;
++	}
++	nrt->last_ra_rcvd = jiffies;
++	nrt->state = ROUTER_REACHABLE;
++	nrt->interval = rptr->interval;
++	nrt->lifetime = rptr->lifetime;
++	nrt->ifindex = rptr->ifindex;
++	nrt->flags = rptr->flags;
++	nrt->glob_addr = rptr->glob_addr;
++
++	/* Whether from current router */
++	if (curr_router && curr_router->reachable && 
++	    is_current_rtr(nrt, curr_router)) {
++		if (nrt->interval)
++			mod_timer(&r_timer, jiffies + (nrt->interval * HZ)/1000);
++		else
++			mod_timer(&r_timer, jiffies + max_rtr_reach_time * HZ);
++		mdet_statemachine(RA_RCVD);
++		spin_unlock(&router_lock);
++		return MIPV6_ADD_RTR;
++	} else if (oldstate == NO_RTR) {
++		rt6_purge_dflt_routers(0); /* For multiple interface case */
++		DEBUG(DBG_INFO, "No router or router not reachable, switching to new one");   
++		goto handoff;
++	}
++	if (!curr_router) { 
++	        /* Startup */
++	        goto handoff;
++	}
++	/* Router behind same interface as current one ?*/
++	same_if = (nrt->ifindex == curr_router->ifindex);
++	/* Switch to new router behind same interface if eager cell 
++	 *  switching is used or if the interface is preferred
++	 */
++	if ((new_router && eager_cell_switching && same_if) ||
++	    (mdet_get_if_preference(nrt->ifindex) > 
++	     mdet_get_if_preference(curr_router->ifindex))) {
++		DEBUG(DBG_INFO, "Switching to new router.");
++		goto handoff;
++	}
++	
++	/* No handoff, don't add default route */
++	DEBUG(DEBUG_MDETECT, "Ignoring RA");
++	spin_unlock(&router_lock);
++	return MIPV6_IGN_RTR;
++handoff:
++	clean_ncache(nrt, curr_router, same_if);
++	nrt->reachable = 1;
++	if (same_if && change_next_rtr(nrt, curr_router)) {
++		mipv6_do_ll_dad(nrt->ifindex);
++		nrt->flags |= LLADDR_TENTATIVE;
++	}
++	spin_unlock(&router_lock);
++
++	return MIPV6_CHG_RTR;
++}	
++
++/* 
++ * Called from ndisc.c's router_discovery.
++ */
++
++static inline int ret_to_ha(struct in6_addr *addr)
++{
++	int res = 0;
++	struct mn_info *minfo;
++	read_lock(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_ha(addr);
++	if (minfo != NULL) {
++		spin_lock(&minfo->lock);
++		if (minfo->has_home_reg) {
++			res = 1;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock(&mn_info_lock);
++	return res;
++}
++
++static int mipv6_mn_ra_rcv(struct sk_buff *skb, struct ndisc_options *ndopts)
++{
++	int ifi = ((struct inet6_skb_parm *)skb->cb)->iif;
++	struct ra_msg *ra = (struct ra_msg *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct router nrt;
++	struct in6_addr *ha = NULL;
++	u8 *lladdr = NULL;
++	int res;
++	DEBUG_FUNC();
++
++	memset(&nrt, 0, sizeof(struct router));
++
++	if (ra->icmph.icmp6_home_agent) {
++		nrt.flags |= ND_RA_FLAG_HA;
++		DEBUG(DBG_DATADUMP, "RA has ND_RA_FLAG_HA up");
++	}
++
++	if (ra->icmph.icmp6_addrconf_managed) {
++		nrt.flags |= ND_RA_FLAG_MANAGED;
++		DEBUG(DBG_DATADUMP, "RA has ND_RA_FLAG_MANAGED up");
++	}
++
++	if (ra->icmph.icmp6_addrconf_other) {
++		nrt.flags |= ND_RA_FLAG_OTHER;
++		DEBUG(DBG_DATADUMP, "RA has ND_RA_FLAG_OTHER up");
++	}
++
++	ipv6_addr_copy(&nrt.ll_addr, saddr);
++	nrt.ifindex = ifi;
++	nrt.lifetime = ntohs(ra->icmph.icmp6_rt_lifetime);
++
++	if (ndopts->nd_opts_src_lladdr) {
++		lladdr = (u8 *) ndopts->nd_opts_src_lladdr+2;
++		nrt.link_addr_len = skb->dev->addr_len;
++		memcpy(nrt.link_addr, lladdr, nrt.link_addr_len);
++	}
++	if (ndopts->nd_opts_pi) {
++		struct nd_opt_hdr *p;
++		for (p = ndopts->nd_opts_pi;
++		     p;
++		     p = ndisc_next_option(p, ndopts->nd_opts_pi_end)) {
++			struct prefix_info *pinfo;
++			int update = 0;
++
++			pinfo = (struct prefix_info *) p;
++
++			if (!pinfo->autoconf)
++				continue;
++
++			if ((pinfo->router_address && 
++			     (update = ret_to_ha(&pinfo->prefix))) ||
++			    ipv6_addr_type(&nrt.raddr) != IPV6_ADDR_UNICAST) {
++				ipv6_addr_copy(&nrt.raddr, &pinfo->prefix);
++				nrt.pfix_len = pinfo->prefix_len;
++				if (pinfo->router_address)
++					nrt.glob_addr = 1;
++				else
++					nrt.glob_addr = 0;
++				if (update)
++					ha = &pinfo->prefix;
++				DEBUG(DBG_DATADUMP, "Address of the received "
++				      "prefix info option: %x:%x:%x:%x:%x:%x:%x:%x", 
++				      NIPV6ADDR(&nrt.raddr));
++				DEBUG(DBG_DATADUMP, "the length of the prefix is %d", 
++				      nrt.pfix_len);
++			}
++		}
++	}
++	if (ndopts->nd_opts_rai) {			
++		nrt.interval = ntohl(*(__u32 *)(ndopts->nd_opts_rai+4));
++		DEBUG(DBG_DATADUMP, 
++		      "received router interval option with interval : %d ",
++		      nrt.interval / HZ);
++
++		if (nrt.interval > MAX_RADV_INTERVAL) {
++			nrt.interval = 0;
++			DEBUG(DBG_DATADUMP, "but we are using: %d, "
++			      "because interval>MAX_RADV_INTERVAL",
++			      nrt.interval / HZ);
++		}
++	}
++
++	res = mipv6_router_event(&nrt);
++	
++	if (ha && lladdr) {
++		mipv6_mn_ha_nd_update(__dev_get_by_index(ifi), ha, lladdr);
++	}
++	return res;
++}
++
++int __init mipv6_initialize_mdetect(void)
++{
++
++	DEBUG_FUNC();
++
++	spin_lock_init(&router_lock);
++	spin_lock_init(&ho_lock);
++	init_timer(&coa_timer);
++	init_timer(&r_timer);
++	r_timer.expires = jiffies + HZ;
++	add_timer(&r_timer);
++
++	/* Actual HO, also deletes old routes after the addition of new ones 
++	   in ndisc */
++	MIPV6_SETCALL(mipv6_change_router, mipv6_change_router);
++
++	MIPV6_SETCALL(mipv6_ra_rcv, mipv6_mn_ra_rcv);
++
++	return 0;
++}
++
++int __exit mipv6_shutdown_mdetect()
++{
++
++	DEBUG_FUNC();
++
++	MIPV6_RESETCALL(mipv6_ra_rcv);
++	MIPV6_RESETCALL(mipv6_change_router);
++	spin_lock_bh(&router_lock);
++	spin_lock(&ho_lock);
++	del_timer(&coa_timer);
++	del_timer(&r_timer);
++	/* Free the memory allocated by router list */
++	list_free(&curr_router);
++	if (_ho)
++		kfree(_ho);
++	spin_unlock(&ho_lock);
++	spin_unlock_bh(&router_lock);
++	return 0;
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mdetect.h
+@@ -0,0 +1,37 @@
++/*
++ *      MIPL Mobile IPv6 Movement detection module header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MDETECT_H
++#define _MDETECT_H
++
++struct handoff {
++	int home_address; /* Is the coa a home address */
++	int ifindex;
++	int plen;
++	struct in6_addr *coa;
++	struct in6_addr rtr_addr; /* Prefix or rtr address if coa is home address */
++};
++
++int mipv6_initialize_mdetect(void);
++
++int mipv6_shutdown_mdetect(void);
++
++int mipv6_get_care_of_address(struct in6_addr *homeaddr, struct in6_addr *coa);
++
++int mipv6_mdet_del_if(int ifindex);
++
++int mipv6_mdet_finalize_ho(const struct in6_addr *coa, const int ifindex);
++
++void mipv6_mdet_retrigger_ho(void);
++
++void mipv6_mdet_set_curr_rtr_reachable(int reachable);
++
++#endif /* _MDETECT_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mipv6_icmp.c
+@@ -0,0 +1,342 @@
++/**
++ * Generic icmp routines
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>,
++ * Ville Nuorvala <vnuorval@tcs.hut.fi> 
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/icmpv6.h>
++#include <net/checksum.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++#include <net/mipglue.h>
++
++#include "debug.h"
++#include "bcache.h"
++#include "mipv6_icmp.h"
++#include "config.h"
++
++struct mipv6_icmpv6_msg {
++	struct icmp6hdr icmph;
++	__u8 *data;
++	struct in6_addr *daddr;
++	int len;
++	__u32 csum;
++};
++
++#define MIPV6_ICMP_HOP_LIMIT 64
++
++static struct socket *mipv6_icmpv6_socket = NULL;
++static __u16 identifier = 0;
++
++int mipv6_icmpv6_no_rcv(struct sk_buff *skb)
++{
++	return 0;
++}
++
++static int mipv6_icmpv6_xmit_holder = -1;
++
++static int mipv6_icmpv6_xmit_lock_bh(void)
++{
++	if (!spin_trylock(&mipv6_icmpv6_socket->sk->lock.slock)) {
++		if (mipv6_icmpv6_xmit_holder == smp_processor_id())
++			return -EAGAIN;
++		spin_lock(&mipv6_icmpv6_socket->sk->lock.slock);
++	}
++	mipv6_icmpv6_xmit_holder = smp_processor_id();
++	return 0;
++}
++
++static __inline__ int mipv6_icmpv6_xmit_lock(void)
++{
++	int ret;
++	local_bh_disable();
++	ret = mipv6_icmpv6_xmit_lock_bh();
++	if (ret)
++		local_bh_enable();
++	return ret;
++}
++
++static void mipv6_icmpv6_xmit_unlock_bh(void)
++{
++	mipv6_icmpv6_xmit_holder = -1;
++	spin_unlock(&mipv6_icmpv6_socket->sk->lock.slock);
++}
++
++static __inline__ void mipv6_icmpv6_xmit_unlock(void)
++{
++	mipv6_icmpv6_xmit_unlock_bh();
++	local_bh_enable();
++}
++
++
++/**
++ * mipv6_icmpv6_dest_unreach - Destination Unreachable ICMP error message handler
++ * @skb: buffer containing ICMP error message
++ *
++ * Special Mobile IPv6 ICMP handling.  If Correspondent Node receives
++ * persistent ICMP Destination Unreachable messages for a destination
++ * in its Binding Cache, the binding should be deleted.  See draft
++ * section 8.8.
++ **/
++static int mipv6_icmpv6_rcv_dest_unreach(struct sk_buff *skb)
++{
++	struct icmp6hdr *icmph = (struct icmp6hdr *) skb->h.raw;
++	struct ipv6hdr *ipv6h = (struct ipv6hdr *) (icmph + 1);
++	int left = (skb->tail - skb->h.raw) - sizeof(*icmph)- sizeof(ipv6h);
++	struct ipv6_opt_hdr *eh;
++	struct rt2_hdr *rt2h = NULL;
++	struct in6_addr *daddr = &ipv6h->daddr;
++	struct in6_addr *saddr = &ipv6h->saddr;
++	int hdrlen, nexthdr = ipv6h->nexthdr;
++	struct mipv6_bce bce;
++	DEBUG_FUNC();
++
++	eh = (struct ipv6_opt_hdr *) (ipv6h + 1);
++
++	while (left > 0) {
++		if (nexthdr != NEXTHDR_HOP && nexthdr != NEXTHDR_DEST && 
++		    nexthdr != NEXTHDR_ROUTING)
++			return 0;
++
++		hdrlen = ipv6_optlen(eh);
++		if (hdrlen > left)
++			return 0;
++
++		if (nexthdr == NEXTHDR_ROUTING) {
++			struct ipv6_rt_hdr *rth = (struct ipv6_rt_hdr *) eh;
++
++			if (rth->type == IPV6_SRCRT_TYPE_2) {
++				if (hdrlen != sizeof(struct rt2_hdr))
++					return 0;
++
++				rt2h = (struct rt2_hdr *) rth;
++
++				if (rt2h->rt_hdr.segments_left > 0)
++					daddr = &rt2h->addr;
++				break;
++			}
++		}
++		/* check for home address option in case this node is a MN */
++		if (nexthdr == NEXTHDR_DEST) {
++			__u8 *raw = (__u8 *) eh;
++			__u16 i = 2;
++			while (1) {
++				struct mipv6_dstopt_homeaddr *hao;
++				
++				if (i + sizeof (*hao) > hdrlen)
++					break;
++				
++				hao = (struct mipv6_dstopt_homeaddr *) &raw[i];
++				
++				if (hao->type == MIPV6_TLV_HOMEADDR &&
++				    hao->length == sizeof(struct in6_addr)) {
++					saddr = &hao->addr;
++					break;
++				}
++				if (hao->type)
++					i += hao->length + 2;
++				else
++					i++;
++			}
++			
++		}
++		nexthdr = eh->nexthdr;
++		eh = (struct ipv6_opt_hdr *) ((u8 *) eh + hdrlen);
++		left -= hdrlen;
++	}
++	if (rt2h == NULL) return 0;
++
++	if (mipv6_bcache_get(daddr, saddr, &bce) == 0 && !(bce.flags&HOME_REGISTRATION)) {
++		/* A primitive algorithm for detecting persistent ICMP destination unreachable messages */
++		if (bce.destunr_count &&
++		    time_after(jiffies, 
++			       bce.last_destunr + MIPV6_DEST_UNR_IVAL*HZ)) 
++			bce.destunr_count = 0;
++
++		bce.destunr_count++;
++
++		mipv6_bcache_icmp_err(daddr, saddr, bce.destunr_count);
++
++		if (bce.destunr_count > MIPV6_MAX_DESTUNREACH && mipv6_bcache_delete(daddr, saddr, CACHE_ENTRY) == 0) {
++			DEBUG(DBG_INFO, "Deleted bcache entry "
++			      "%x:%x:%x:%x:%x:%x:%x:%x "
++			      "%x:%x:%x:%x:%x:%x:%x:%x (reason: "
++			      "%d dest unreachables) ",
++			      NIPV6ADDR(daddr), NIPV6ADDR(saddr), bce.destunr_count);
++		}
++	}
++	return 0;
++}
++
++static int mipv6_icmpv6_getfrag(const void *data, struct in6_addr *saddr, 
++				char *buff, unsigned int offset, 
++				unsigned int len)
++{
++	struct mipv6_icmpv6_msg *msg = (struct mipv6_icmpv6_msg *) data;
++	struct icmp6hdr *icmph;
++	__u32 csum;
++
++	if (offset) {
++		msg->csum = csum_partial_copy_nocheck(msg->data + offset -
++						      sizeof(*icmph), buff,
++						      len, msg->csum);
++		return 0;
++	}
++	
++	csum = csum_partial_copy_nocheck((__u8 *) &msg->icmph, buff,
++					 sizeof(*icmph), msg->csum);
++	
++	csum = csum_partial_copy_nocheck(msg->data, buff + sizeof(*icmph),
++					 len - sizeof(*icmph), csum);
++	
++	icmph = (struct icmp6hdr *) buff;
++	
++	icmph->icmp6_cksum = csum_ipv6_magic(saddr, msg->daddr, msg->len,
++					     IPPROTO_ICMPV6, csum);
++	return 0; 
++}
++
++/**
++ * mipv6_icmpv6_send - generic icmpv6 message send
++ * @daddr: destination address
++ * @saddr: source address
++ * @type: icmp type
++ * @code: icmp code
++ * @id: packet identifier. If null, uses internal counter to get new id
++ * @data: packet data
++ * @datalen: length of data in bytes
++ */
++void mipv6_icmpv6_send(struct in6_addr *daddr, struct in6_addr *saddr, int type,
++		       int code, __u16 *id, __u16 flags, void *data, int datalen)
++{
++	struct sock *sk = mipv6_icmpv6_socket->sk;
++	struct flowi fl;
++	struct mipv6_icmpv6_msg msg;
++
++	DEBUG_FUNC();
++
++	fl.proto = IPPROTO_ICMPV6;
++	fl.fl6_dst = daddr;
++	fl.fl6_src = saddr;
++	fl.fl6_flowlabel = 0;
++	fl.uli_u.icmpt.type = type;
++	fl.uli_u.icmpt.code = code;
++
++	msg.icmph.icmp6_type = type;
++	msg.icmph.icmp6_code = code;
++	msg.icmph.icmp6_cksum = 0;
++
++	if (id)
++		msg.icmph.icmp6_identifier = htons(*id);
++	else
++		msg.icmph.icmp6_identifier = htons(identifier++);
++
++	msg.icmph.icmp6_sequence = htons(flags);
++	msg.data = data;
++	msg.csum = 0;
++	msg.len = datalen + sizeof(struct icmp6hdr);
++	msg.daddr = daddr;
++
++	if (mipv6_icmpv6_xmit_lock())
++		return;
++
++	ip6_build_xmit(sk, mipv6_icmpv6_getfrag, &msg, &fl, msg.len, NULL, -1,
++		       MSG_DONTWAIT);
++
++	ICMP6_INC_STATS_BH(Icmp6OutMsgs);
++	mipv6_icmpv6_xmit_unlock();
++}
++
++/**
++ * icmp6_rcv - ICMPv6 receive and multiplex
++ * @skb: buffer containing ICMP message
++ *
++ * Generic ICMPv6 receive function to multiplex messages to approriate
++ * handlers.  Only used for ICMP messages with special handling in
++ * Mobile IPv6.
++ **/
++static void icmp6_rcv(struct sk_buff *skb)
++{
++	struct icmp6hdr *hdr;
++
++	if (skb_is_nonlinear(skb) &&
++	    skb_linearize(skb, GFP_ATOMIC) != 0) {
++		kfree_skb(skb);
++		return;
++	}
++	__skb_push(skb, skb->data-skb->h.raw);
++
++	hdr = (struct icmp6hdr *) skb->h.raw;
++
++	switch (hdr->icmp6_type) {
++	case ICMPV6_DEST_UNREACH:
++		mipv6_icmpv6_rcv_dest_unreach(skb);
++		break;
++
++	case ICMPV6_PARAMPROB:
++		mip6_fn.icmpv6_paramprob_rcv(skb);
++		break;
++
++	case MIPV6_DHAAD_REPLY:
++		mip6_fn.icmpv6_dhaad_rep_rcv(skb);
++		break;
++
++	case MIPV6_PREFIX_ADV:
++		mip6_fn.icmpv6_pfxadv_rcv(skb);
++		break;
++
++	case MIPV6_DHAAD_REQUEST:
++		mip6_fn.icmpv6_dhaad_req_rcv(skb);
++		break;
++
++	case MIPV6_PREFIX_SOLICIT:
++		mip6_fn.icmpv6_pfxsol_rcv(skb);
++		break;
++	}
++}
++
++int mipv6_icmpv6_init(void)
++{
++	struct sock *sk;
++	int err;
++
++	if ((mipv6_icmpv6_socket = sock_alloc()) == NULL) {
++		DEBUG(DBG_ERROR, "Cannot allocate mipv6_icmpv6_socket");
++		return -1;
++	}
++	mipv6_icmpv6_socket->type = SOCK_RAW;
++
++	if ((err = sock_create(PF_INET6, SOCK_RAW, IPPROTO_ICMP, 
++			       &mipv6_icmpv6_socket)) < 0) {
++		DEBUG(DBG_ERROR, "Cannot initialize mipv6_icmpv6_socket");
++		sock_release(mipv6_icmpv6_socket);
++		mipv6_icmpv6_socket = NULL; /* For safety */
++		return err;
++	}
++	sk = mipv6_icmpv6_socket->sk;
++	sk->allocation = GFP_ATOMIC;
++	sk->prot->unhash(sk);
++
++	/* Register our ICMP handler */
++	MIPV6_SETCALL(mipv6_icmp_rcv, icmp6_rcv);
++	return 0;
++}
++
++void mipv6_icmpv6_exit(void)
++{
++	MIPV6_RESETCALL(mipv6_icmp_rcv);
++	if (mipv6_icmpv6_socket)
++		sock_release(mipv6_icmpv6_socket);
++	mipv6_icmpv6_socket = NULL; /* For safety */
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mipv6_icmp.h
+@@ -0,0 +1,43 @@
++/*
++ *      MIPL Mobile IPv6 ICMP send and receive prototypes
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MIPV6_ICMP
++#define _MIPV6_ICMP
++
++#include <linux/config.h>
++#include <linux/in6.h>
++
++void mipv6_icmpv6_send(struct in6_addr *daddr, struct in6_addr *saddr,
++		       int type, int code, __u16 *id, __u16 flags,
++		       void *data, int datalen);
++
++void mipv6_icmpv6_send_dhaad_req(struct in6_addr *home_addr, int plen, __u16 dhaad_id);
++
++void mipv6_icmpv6_send_dhaad_rep(int ifindex, __u16 id, struct in6_addr *daddr);
++/* No handling */
++int mipv6_icmpv6_no_rcv(struct sk_buff *skb);
++
++/* Receive DHAAD Reply message */
++int mipv6_icmpv6_rcv_dhaad_rep(struct sk_buff *skb);
++/* Receive Parameter Problem message */
++int mipv6_icmpv6_rcv_paramprob(struct sk_buff *skb);
++/* Receive prefix advertisements */
++int mipv6_icmpv6_rcv_pfx_adv(struct sk_buff *skb);
++
++/* Receive DHAAD Request message */
++int mipv6_icmpv6_rcv_dhaad_req(struct sk_buff *skb);
++/* Receive prefix solicitations */
++int mipv6_icmpv6_rcv_pfx_sol(struct sk_buff *skb);
++
++int mipv6_icmpv6_init(void);
++void mipv6_icmpv6_exit(void);
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mipv6_icmp_ha.c
+@@ -0,0 +1,158 @@
++/*
++ *	Home Agent specific ICMP routines
++ *
++ *	Authors:
++ *	Antti Tuominen	<ajtuomin@tml.hut.fi>
++ *	Jaakko Laine	<medved@iki.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "halist.h"
++#include "debug.h"
++#include "mipv6_icmp.h"
++//#include "prefix.h"
++
++/* Is this the easiest way of checking on 
++ *  which interface an anycast address is ?
++ */
++static int find_ac_dev(struct in6_addr *addr)
++{
++	int ifindex = 0;
++	struct net_device *dev;
++	read_lock(&dev_base_lock);
++	for (dev=dev_base; dev; dev=dev->next) {
++		if (ipv6_chk_acast_addr(dev, addr)) {
++			ifindex = dev->ifindex;
++			break;
++		}
++	}
++	read_unlock(&dev_base_lock);
++	return ifindex;
++}
++
++/**
++ * mipv6_icmpv6_send_dhaad_rep - Reply to DHAAD Request
++ * @ifindex: index of interface request was received from
++ * @id: request's identification number
++ * @daddr: requester's IPv6 address
++ *
++ * When Home Agent receives Dynamic Home Agent Address Discovery
++ * request, it replies with a list of home agents available on the
++ * home link.
++ */
++void mipv6_icmpv6_send_dhaad_rep(int ifindex, __u16 id, struct in6_addr *daddr)
++{
++	__u8 *data = NULL;
++	struct in6_addr home, *ha_addrs = NULL;
++	int addr_count, max_addrs, size = 0;
++
++	if (daddr == NULL)
++		return;
++
++	if (mipv6_ha_get_addr(ifindex, &home) < 0) {
++		DEBUG(DBG_INFO, "Not Home Agent in this interface");
++		return;
++	}
++
++	/* We send all available HA addresses, not exceeding a maximum
++	 * number we can fit in a packet with minimum IPv6 MTU (to
++	 * avoid fragmentation).
++	 */
++	max_addrs = 76;
++	addr_count = mipv6_ha_get_pref_list(ifindex, &ha_addrs, max_addrs);
++
++	if (addr_count < 0) return;
++
++	if (addr_count != 0 && ha_addrs == NULL) {
++		DEBUG(DBG_ERROR, "addr_count = %d but return no addresses", 
++		      addr_count);
++		return;
++	}
++	data = (u8 *)ha_addrs;
++
++	size = addr_count * sizeof(struct in6_addr);
++
++	mipv6_icmpv6_send(daddr, &home, MIPV6_DHAAD_REPLY, 
++			  0, &id, 0, data, size);
++	if (ha_addrs) {
++		data = NULL;
++		kfree(ha_addrs);
++	}
++}
++
++/** 
++ * mipv6_icmpv6_dhaad_req - Home Agent Address Discovery Request ICMP handler
++ * @skb: buffer containing ICMP information message
++ *
++ * Special Mobile IPv6 ICMP message.  Handles Dynamic Home Agent
++ * Address Discovery Request messages.
++ **/
++int mipv6_icmpv6_rcv_dhaad_req(struct sk_buff *skb)
++{
++	struct icmp6hdr *phdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
++	__u16 identifier;
++	int ifindex = 0;
++
++	DEBUG_FUNC();
++
++	/* Invalid packet checks. */
++	if (phdr->icmp6_code != 0)
++		return 0;
++
++	identifier = ntohs(phdr->icmp6_identifier);
++
++	/* 
++	 * Make sure we have the right ifindex (if the
++	 * req came through another interface. 
++	 */
++	ifindex = find_ac_dev(daddr);
++	if (ifindex == 0) { 
++		DEBUG(DBG_WARNING, "received dhaad request to anycast address %x:%x:%x:%x:%x:%x:%x:%x"
++		      " on which prefix we are not HA",
++		      NIPV6ADDR(daddr));
++		return 0;
++	}
++
++	/*
++	 * send reply with list
++	 */
++	mipv6_icmpv6_send_dhaad_rep(ifindex, identifier, saddr);
++	return 1;
++}
++#if 0
++/**
++ * mipv6_icmpv6_handle_pfx_sol - handle prefix solicitations
++ * @skb: sk_buff including the icmp6 message
++ */
++int mipv6_icmpv6_rcv_pfx_sol(struct sk_buff *skb)
++{
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
++	struct inet6_ifaddr *ifp;
++
++	DEBUG_FUNC();
++
++	if (!(ifp = ipv6_get_ifaddr(daddr, NULL)))
++		return -1;
++
++	in6_ifa_put(ifp);
++	mipv6_pfx_cancel_send(saddr, -1);
++
++	return 0;
++}
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mipv6_icmp_mn.c
+@@ -0,0 +1,273 @@
++/*
++ *	Mobile Node specific ICMP routines
++ *
++ *	Authors:
++ *	Antti Tuominen	<ajtuomin@tml.hut.fi>
++ *	Jaakko Laine	<medved@iki.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/sched.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "mn.h"
++#include "bul.h"
++#include "mdetect.h"
++#include "debug.h"
++#include "mipv6_icmp.h"
++#include "util.h"
++//#include "prefix.h"
++
++#define INFINITY 0xffffffff
++
++/**
++ * mipv6_icmpv6_paramprob - Parameter Problem ICMP error message handler
++ * @skb: buffer containing ICMP error message
++ *
++ * Special Mobile IPv6 ICMP handling.  If Mobile Node receives ICMP
++ * Parameter Problem message when using a Home Address Option,
++ * offending node should be logged and error message dropped.  If
++ * error is received because of a Binding Update, offending node
++ * should be recorded in Binding Update List and no more Binding
++ * Updates should be sent to this destination.  See RFC 3775 section
++ * 10.15.
++ **/
++int mipv6_icmpv6_rcv_paramprob(struct sk_buff *skb)
++{
++	struct icmp6hdr *phdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *saddr = skb ? &skb->nh.ipv6h->saddr : NULL;
++	struct in6_addr *daddr = skb ? &skb->nh.ipv6h->daddr : NULL;
++	struct ipv6hdr *hdr = (struct ipv6hdr *) (phdr + 1);
++	int ulen = (skb->tail - (unsigned char *) (phdr + 1));
++
++	int errptr;
++	__u8 *off_octet;
++
++	DEBUG_FUNC();
++
++	/* We only handle code 1 & 2 messages. */
++	if (phdr->icmp6_code != ICMPV6_UNK_NEXTHDR &&
++	    phdr->icmp6_code != ICMPV6_UNK_OPTION)
++		return 0;
++
++	/* Find offending octet in the original packet. */
++	errptr = ntohl(phdr->icmp6_pointer);
++
++	/* There is not enough of the original packet left to figure
++	 * out what went wrong. Bail out. */
++	if (ulen <= errptr)
++		return 0;
++
++	off_octet = ((__u8 *) hdr + errptr);
++	DEBUG(DBG_INFO, "Parameter problem: offending octet %d [0x%2x]",
++	      errptr, *off_octet);
++
++	/* If CN did not understand Mobility Header, set BUL entry to
++	 * ACK_ERROR so no further BUs are sumbitted to this CN. */
++	if (phdr->icmp6_code == ICMPV6_UNK_NEXTHDR &&
++	    *off_octet == IPPROTO_MOBILITY) {
++		struct bul_inval_args args;
++		args.all_rr_states = 1;
++		args.cn = saddr;
++		args.mn = daddr;
++		write_lock(&bul_lock);
++		mipv6_bul_iterate(mn_bul_invalidate, &args);
++		write_unlock(&bul_lock);
++	}
++
++	/* If CN did not understand Home Address Option, we log an
++	 * error and discard the error message. */
++	if (phdr->icmp6_code == ICMPV6_UNK_OPTION &&
++	    *off_octet == MIPV6_TLV_HOMEADDR) {
++		DEBUG(DBG_WARNING, "Correspondent node does not "
++		      "implement Home Address Option receipt.");
++		return 1;
++	}
++	return 0;
++}
++
++/**
++ * mipv6_mn_dhaad_send_req - Send DHAAD Request to home network
++ * @home_addr: address to do DHAAD for
++ * @plen: prefix length for @home_addr
++ *
++ * Send Dynamic Home Agent Address Discovery Request to the Home
++ * Agents anycast address in the nodes home network.
++ **/
++void 
++mipv6_icmpv6_send_dhaad_req(struct in6_addr *home_addr, int plen, __u16 dhaad_id)
++{
++	struct in6_addr ha_anycast;
++	struct in6_addr careofaddr;
++	
++	if (mipv6_get_care_of_address(home_addr, &careofaddr) < 0) {
++		DEBUG(DBG_WARNING, "Could not get node's Care-of Address");
++		return;
++	}
++
++	if (mipv6_ha_anycast(&ha_anycast, home_addr, plen) < 0) {
++		DEBUG(DBG_WARNING, 
++		      "Could not get Home Agent Anycast address for home address %x:%x.%x:%x:%x:%x:%x:%x/%d",
++		      NIPV6ADDR(home_addr), plen);
++		return;
++	}
++
++	mipv6_icmpv6_send(&ha_anycast, &careofaddr, MIPV6_DHAAD_REQUEST, 0, 
++			  &dhaad_id, 0, NULL, 0);
++
++}
++
++/** 
++ * mipv6_icmpv6_dhaad_rep - Home Agent Address Discovery Reply ICMP handler
++ * @skb: buffer containing ICMP information message
++ *
++ * Special Mobile IPv6 ICMP message.  Handles Dynamic Home Agent
++ * Address Discovery Reply messages.
++ **/
++int mipv6_icmpv6_rcv_dhaad_rep(struct sk_buff *skb)
++{
++	struct icmp6hdr *phdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *address;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	__u16 identifier;
++	int ulen = (skb->tail - (unsigned char *) ((__u32 *) phdr + 2));
++	int i;
++	struct in6_addr home_addr, coa;
++	struct in6_addr *first_ha = NULL;
++	struct mn_info *minfo;
++	int n_addr = ulen / sizeof(struct in6_addr);
++
++	DEBUG_FUNC();
++
++	/* Invalid packet checks. */
++	if (ulen % sizeof(struct in6_addr) != 0)
++		return 0;
++
++	if (phdr->icmp6_code != 0)
++		return 0;
++
++	identifier = ntohs(phdr->icmp6_identifier);
++	if (ulen > 0) {
++		address = (struct in6_addr *) ((__u32 *) phdr + 2);
++	} else {
++		address = saddr;
++		n_addr = 1;
++	}
++
++	/* receive list of home agent addresses
++	 * add to home agents list
++	 */
++	DEBUG(DBG_INFO, "DHAAD: got %d home agents", n_addr);
++
++	first_ha = address;
++
++	/* lookup H@ with identifier */
++	read_lock(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_id(identifier);
++	if (!minfo) {
++		read_unlock(&mn_info_lock);
++		DEBUG(DBG_INFO, "no mninfo with id %d", 
++		      identifier);
++		return 0;
++	}
++	spin_lock(&minfo->lock);
++
++	/* Logic:
++	 * 1. if old HA on list, prefer it
++	 * 2. otherwise first HA on list prefered
++	 */
++	for (i = 0; i < n_addr; i++) {
++		DEBUG(DBG_INFO, "HA[%d] %x:%x:%x:%x:%x:%x:%x:%x",
++		      i, NIPV6ADDR(address));
++		if (ipv6_addr_cmp(&minfo->ha, address) == 0) {
++			spin_unlock(&minfo->lock);
++			read_unlock(&mn_info_lock);
++			return 0;
++		}
++		address++;
++	}
++	ipv6_addr_copy(&minfo->ha, first_ha);
++	spin_unlock(&minfo->lock);
++	ipv6_addr_copy(&home_addr, &minfo->home_addr);
++	read_unlock(&mn_info_lock);
++
++	mipv6_get_care_of_address(&home_addr, &coa);
++	init_home_registration(&home_addr, &coa);
++
++	return 1;
++}
++#if 0
++/**
++ * mipv6_icmpv6_handle_pfx_adv - handle prefix advertisements
++ * @skb: sk_buff including the icmp6 message
++ */
++int mipv6_icmpv6_rcv_pfx_adv(struct sk_buff *skb)
++{
++	struct icmp6hdr *hdr = (struct icmp6hdr *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
++	__u8 *opt = (__u8 *) (hdr + 1);
++	int optlen = (skb->tail - opt);
++	unsigned long min_expire = INFINITY;
++	struct inet6_skb_parm *parm = (struct inet6_skb_parm *) skb->cb;
++
++	DEBUG_FUNC();
++
++	while (optlen > 0) {
++		int len = opt[1] << 3;
++		if (len == 0)
++			goto set_timer;
++
++		if (opt[0] == ND_OPT_PREFIX_INFO) {
++			int ifindex;
++			unsigned long expire;
++			struct prefix_info *pinfo =
++				(struct prefix_info *) opt;
++			struct net_device *dev;
++			struct mn_info *mninfo;
++
++			read_lock(&mn_info_lock);
++			mninfo = mipv6_mninfo_get_by_ha(saddr);
++			if (mninfo == NULL) {
++				ifindex = 0;
++			} else {
++				spin_lock(&mninfo->lock);
++				ifindex = mninfo->ifindex;
++				spin_unlock(&mninfo->lock);
++				mninfo = NULL;
++			}
++			read_unlock(&mn_info_lock);
++
++			if (!(dev = dev_get_by_index(ifindex))) {
++				DEBUG(DBG_WARNING, "Cannot find device by index %d", parm->iif);
++				goto nextopt;
++			}
++
++			expire = ntohl(pinfo->valid);
++			expire = expire == 0 ? INFINITY : expire;
++
++			min_expire = expire < min_expire ? expire : min_expire;
++
++			dev_put(dev);
++		}
++
++nextopt:
++		optlen -= len;
++		opt += len;
++	}
++
++set_timer:
++
++	mipv6_pfx_add_home(parm->iif, saddr, daddr, min_expire);
++	return 0;
++}
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mn.c
+@@ -0,0 +1,1521 @@
++/*
++ *      Mobile-node functionality
++ *
++ *      Authors:
++ *      Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/autoconf.h>
++#include <linux/sched.h>
++#include <linux/ipv6.h>
++#include <linux/net.h>
++#include <linux/init.h>
++#include <linux/skbuff.h>
++#include <linux/rtnetlink.h>
++#include <linux/if_arp.h>
++#include <linux/ipsec.h>
++#include <linux/notifier.h>
++#include <linux/list.h>
++#include <linux/route.h>
++#include <linux/netfilter.h>
++#include <linux/netfilter_ipv6.h>
++#include <linux/tqueue.h>
++#include <linux/proc_fs.h>
++
++#include <asm/uaccess.h>
++
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/neighbour.h>
++#include <net/ndisc.h>
++#include <net/ip6_route.h>
++#include <net/mipglue.h>
++
++#include "util.h"
++#include "mdetect.h"
++#include "bul.h"
++#include "mobhdr.h"
++#include "debug.h"
++#include "mn.h"
++#include "mipv6_icmp.h"
++#include "multiaccess_ctl.h"
++//#include "prefix.h"
++#include "tunnel_mn.h"
++#include "stats.h"
++#include "config.h"
++
++#define MIPV6_BUL_SIZE 128
++
++static LIST_HEAD(mn_info_list);
++
++/* Lock for list of MN infos */
++rwlock_t mn_info_lock = RW_LOCK_UNLOCKED;
++
++static spinlock_t ifrh_lock = SPIN_LOCK_UNLOCKED;
++
++struct ifr_holder {
++	struct list_head list;
++	struct in6_ifreq ifr;
++	int old_ifi;
++	struct handoff *ho;
++};
++
++LIST_HEAD(ifrh_list);
++
++static struct tq_struct mv_home_addr_task;
++
++/* Determines whether manually configured home addresses are preferred as 
++ * source addresses over dynamically configured ones
++ */
++int mipv6_use_preconfigured_hoaddr = 1; 
++
++/* Determines whether home addresses, which are at home are preferred as 
++ * source addresses over other home addresses
++ */
++int mipv6_use_topol_corr_hoaddr = 0;
++
++static spinlock_t icmpv6_id_lock = SPIN_LOCK_UNLOCKED;
++static __u16 icmpv6_id = 0;
++
++static inline __u16 mipv6_get_dhaad_id(void)
++{
++	__u16 ret;
++	spin_lock_bh(&icmpv6_id_lock);
++	ret = ++icmpv6_id;
++	spin_unlock_bh(&icmpv6_id_lock);
++	return ret;
++}
++
++/** 
++ * mipv6_mninfo_get_by_home - Returns mn_info for a home address
++ * @haddr: home address of MN
++ *
++ * Returns mn_info on success %NULL otherwise.  Caller MUST hold
++ * @mn_info_lock (read or write).
++ **/
++struct mn_info *mipv6_mninfo_get_by_home(struct in6_addr *haddr)
++{
++	struct list_head *lh;
++	struct mn_info *minfo;
++
++	DEBUG_FUNC();
++
++	if (!haddr)
++		return NULL;
++
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		if (!ipv6_addr_cmp(&minfo->home_addr, haddr)) {
++			spin_unlock(&minfo->lock);
++			return minfo;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	return NULL;
++}
++
++/**
++ * mipv6_mninfo_get_by_ha - Lookup mn_info with Home Agent address
++ * @home_agent: Home Agent address
++ *
++ * Searches for a mn_info entry with @ha set to @home_agent.  You MUST
++ * hold @mn_info_lock when calling this function.  Returns pointer to
++ * mn_info entry or %NULL on failure.
++ **/
++struct mn_info *mipv6_mninfo_get_by_ha(struct in6_addr *home_agent)
++{
++	struct list_head *lh;
++	struct mn_info *minfo;
++
++	if (!home_agent)
++		return NULL;
++
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		if (!ipv6_addr_cmp(&minfo->ha, home_agent)) {
++			spin_unlock(&minfo->lock);
++			return minfo;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	return NULL;
++}
++
++/**
++ * mipv6_mninfo_get_by_id - Lookup mn_info with id
++ * @id: DHAAD identifier
++ *
++ * Searches for a mn_info entry with @dhaad_id set to @id.  You MUST
++ * hold @mn_info_lock when calling this function.  Returns pointer to
++ * mn_info entry or %NULL on failure.
++ **/
++struct mn_info *mipv6_mninfo_get_by_id(unsigned short id)
++{
++	struct list_head *lh;
++	struct mn_info *minfo = 0;
++
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		if (minfo->dhaad_id == id) {
++			spin_unlock(&minfo->lock);
++			return minfo;
++		}
++		spin_unlock(&minfo->lock);
++	}
++	return NULL;
++}
++
++/** 
++ * mipv6_mninfo_add - Adds a new home info for MN
++ * @ifindex: Interface for home address
++ * @home_addr:  Home address of MN, must be set
++ * @plen: prefix length of the home address, must be set
++ * @isathome : home address at home
++ * @lifetime: lifetime of the home address, 0 is infinite
++ * @ha: home agent for the home address
++ * @ha_plen: prefix length of home agent's address, can be zero 
++ * @ha_lifetime: Lifetime of the home address, 0 is infinite
++ *
++ * The function adds a new home info entry for MN, allowing it to
++ * register the home address with the home agent.  Starts home
++ * registration process.  If @ha is %ADDRANY, DHAAD is performed to
++ * find a home agent.  Returns 0 on success, a negative value
++ * otherwise.  Caller MUST NOT hold @mn_info_lock or
++ * @addrconf_hash_lock.
++ **/
++void mipv6_mninfo_add(int ifindex, struct in6_addr *home_addr, int plen, 
++		      int isathome, unsigned long lifetime, struct in6_addr *ha, 
++		      int ha_plen, unsigned long ha_lifetime, int man_conf)
++{
++	struct mn_info *minfo;
++	struct in6_addr coa;
++
++	DEBUG_FUNC();
++
++	write_lock_bh(&mn_info_lock);
++	if ((minfo = mipv6_mninfo_get_by_home(home_addr)) != NULL){ 
++	      DEBUG(1, "MN info already exists");
++	      write_unlock_bh(&mn_info_lock);
++	      return;
++	}
++	minfo = kmalloc(sizeof(struct mn_info), GFP_ATOMIC);
++	if (!minfo) {
++	       write_unlock_bh(&mn_info_lock);
++	       return;
++	}
++	memset(minfo, 0, sizeof(struct mn_info));
++	spin_lock_init(&minfo->lock);
++
++	
++	ipv6_addr_copy(&minfo->home_addr, home_addr);
++
++	if (ha)
++		ipv6_addr_copy(&minfo->ha, ha);
++	if (ha_plen < 128 && ha_plen > 0)
++		minfo->home_plen = ha_plen; 
++	else minfo->home_plen = 64;
++
++	minfo->ifindex_user = ifindex; /* Ifindex for tunnel interface */
++	minfo->ifindex = ifindex; /* Interface on which home address is currently conf'd */
++	/* TODO: we should get home address lifetime from somewhere */
++	/* minfo->home_addr_expires = jiffies + lifetime * HZ; */
++
++	/* manual configuration flag cannot be unset by dynamic updates 
++	 *  from prefix advertisements
++	 */
++	if (!minfo->man_conf) minfo->man_conf = man_conf; 
++	minfo->is_at_home = isathome;
++
++	list_add(&minfo->list, &mn_info_list);
++	write_unlock_bh(&mn_info_lock);
++
++	if (mipv6_get_care_of_address(home_addr, &coa) == 0) 
++		init_home_registration(home_addr, &coa);
++}
++
++/**
++ * mipv6_mninfo_del - Delete home info for MN 
++ * @home_addr : Home address or prefix 
++ * @del_dyn_only : Delete only dynamically created home entries 
++ *
++ * Deletes every mn_info entry that matches the first plen bits of
++ * @home_addr.  Returns number of deleted entries on success and a
++ * negative value otherwise.  Caller MUST NOT hold @mn_info_lock.
++ **/
++int mipv6_mninfo_del(struct in6_addr *home_addr, int del_dyn_only)
++{
++	struct list_head *lh, *next;
++	struct mn_info *minfo;
++	int ret = -1;
++	if (!home_addr)
++		return -1;
++
++	write_lock(&mn_info_lock);
++
++	list_for_each_safe(lh, next, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		if (ipv6_addr_cmp(&minfo->home_addr, home_addr) == 0
++		    && ((!minfo->man_conf && del_dyn_only) || !del_dyn_only)){
++			list_del(&minfo->list);
++			kfree(minfo);
++			ret++;
++		}
++	}
++	write_unlock(&mn_info_lock);
++	return ret;
++}
++
++void mipv6_mn_set_home(int ifindex, struct in6_addr *homeaddr, int plen,
++		       struct in6_addr *homeagent, int ha_plen)
++{
++	mipv6_mninfo_add(ifindex, homeaddr, plen, 0, 0, 
++			 homeagent, ha_plen, 0, 1);
++}
++
++static int skip_dad(struct in6_addr *addr)
++{
++	struct mn_info *minfo;
++	int ret = 0;
++
++	if (addr == NULL) {
++		DEBUG(DBG_CRITICAL, "Null argument");
++		return 0;
++	}
++	read_lock_bh(&mn_info_lock);
++	if ((minfo = mipv6_mninfo_get_by_home(addr)) != NULL) {
++		if ((minfo->is_at_home != MN_NOT_AT_HOME) && (minfo->has_home_reg))
++			ret = 1;
++		DEBUG(DBG_INFO, "minfo->is_at_home = %d, minfo->has_home_reg = %d",
++		      minfo->is_at_home, minfo->has_home_reg);
++	}
++	read_unlock_bh(&mn_info_lock);
++	
++	return ret;
++}
++/**
++ * mipv6_mn_is_home_addr - Determines if addr is node's home address
++ * @addr: IPv6 address
++ *
++ * Returns 1 if addr is node's home address.  Otherwise returns zero.
++ **/
++int mipv6_mn_is_home_addr(struct in6_addr *addr)
++{
++	int ret = 0;
++
++	if (addr == NULL) {
++		DEBUG(DBG_CRITICAL, "Null argument");
++		return -1;
++	}
++	read_lock_bh(&mn_info_lock);
++	if (mipv6_mninfo_get_by_home(addr))
++		ret = 1;
++	read_unlock_bh(&mn_info_lock);
++
++	return (ret);
++}
++
++/** 
++ * mipv6_mn_is_at_home - determine if node is home for a home address
++ * @home_addr : home address of MN
++ *
++ * Returns 1 if home address in question is in the home network, 0
++ * otherwise.  Caller MUST NOT not hold @mn_info_lock.
++ **/ 
++int mipv6_mn_is_at_home(struct in6_addr *home_addr)
++{
++	struct mn_info *minfo;
++	int ret = 0;
++	read_lock_bh(&mn_info_lock);
++	if ((minfo = mipv6_mninfo_get_by_home(home_addr)) != NULL) {
++		spin_lock(&minfo->lock);
++		ret = (minfo->is_at_home == MN_AT_HOME);
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++	return ret;
++}	
++void mipv6_mn_set_home_reg(struct in6_addr *home_addr, int has_home_reg)
++{
++	struct mn_info *minfo;
++	read_lock_bh(&mn_info_lock);
++
++	if ((minfo = mipv6_mninfo_get_by_home(home_addr)) != NULL) {
++		spin_lock(&minfo->lock);
++		minfo->has_home_reg = has_home_reg;
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++}	
++
++static int mn_inet6addr_event(
++	struct notifier_block *nb, unsigned long event, void *ptr)
++{
++	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)ptr;
++
++	switch (event) {
++	case NETDEV_UP:
++		/* Is address a valid coa ?*/
++		if (!(ifp->flags & IFA_F_TENTATIVE))
++			mipv6_mdet_finalize_ho(&ifp->addr, 
++					       ifp->idev->dev->ifindex);
++		else if(skip_dad(&ifp->addr))
++			ifp->flags &= ~IFA_F_TENTATIVE;
++		break;
++	case NETDEV_DOWN:	
++#if 0
++		/* This is useless with manually configured home 
++		   addresses, which will not expire
++		*/
++		mipv6_mninfo_del(&ifp->addr, 0);
++#endif
++	  break;
++
++	}
++
++	return NOTIFY_DONE;
++}
++
++struct notifier_block mipv6_mn_inet6addr_notifier = {
++	mn_inet6addr_event,
++	NULL,
++	0 /* check if using zero is ok */
++};
++
++static void mipv6_get_saddr_hook(struct in6_addr *homeaddr)
++{
++	int found = 0, reiter = 0;
++	struct list_head *lh;
++	struct mn_info *minfo = NULL;
++	struct in6_addr coa;
++
++	read_lock_bh(&mn_info_lock);
++restart:
++	list_for_each(lh, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		if ((ipv6_addr_scope(homeaddr) != ipv6_addr_scope(&minfo->home_addr)) 
++		    || ipv6_chk_addr(&minfo->home_addr, NULL) == 0)
++			continue; 
++
++		spin_lock(&minfo->lock);
++		if (minfo->is_at_home == MN_AT_HOME || minfo->has_home_reg) {
++			if ((mipv6_use_topol_corr_hoaddr && 
++			     minfo->is_at_home == MN_AT_HOME) || 
++			    (mipv6_use_preconfigured_hoaddr && 
++			     minfo->man_conf) ||
++			    (!(mipv6_use_preconfigured_hoaddr || 
++			       mipv6_use_topol_corr_hoaddr) || reiter)) {
++				spin_unlock(&minfo->lock);
++				ipv6_addr_copy(homeaddr, &minfo->home_addr);
++				found = 1;
++				break;
++			}
++		}
++		spin_unlock(&minfo->lock);
++	}
++	if (!found && !reiter) {
++		reiter = 1;
++		goto restart;
++	}
++
++	if (!found && minfo && 
++	    !mipv6_get_care_of_address(&minfo->home_addr, &coa)) {
++		ipv6_addr_copy(homeaddr, &coa); 
++	}
++	read_unlock_bh(&mn_info_lock);
++
++	DEBUG(DBG_DATADUMP, "Source address selection:  %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(homeaddr));
++	return;
++}
++
++static void mv_home_addr(void *arg)
++{
++	mm_segment_t oldfs;
++	int err = 0, new_if = 0;
++	struct list_head *lh, *next;
++	struct ifr_holder *ifrh;
++	LIST_HEAD(list);
++	
++	DEBUG(DBG_INFO, "mipv6 move home address task");
++
++	spin_lock_bh(&ifrh_lock);
++	list_splice_init(&ifrh_list, &list);
++	spin_unlock_bh(&ifrh_lock);
++	
++	oldfs = get_fs(); set_fs(KERNEL_DS);
++	list_for_each_safe(lh, next, &list) {
++		ifrh = list_entry(lh, struct ifr_holder, list);
++		if (ifrh->old_ifi) {
++			new_if = ifrh->ifr.ifr6_ifindex;
++			ifrh->ifr.ifr6_ifindex = ifrh->old_ifi;
++			err = addrconf_del_ifaddr(&ifrh->ifr); 
++			ifrh->ifr.ifr6_ifindex = new_if;
++			if (err < 0)
++				DEBUG(DBG_WARNING, "removal of home address %x:%x:%x:%x:%x:%x:%x:%x from" 
++				      " old interface %d failed with status %d", 
++				      NIPV6ADDR(&ifrh->ifr.ifr6_addr), ifrh->old_ifi, err);		
++		}
++		if(!err) {
++			err = addrconf_add_ifaddr(&ifrh->ifr);
++		}
++		if (ifrh->ho) {
++			DEBUG(DBG_INFO, "Calling mobile_node moved after moving home address to new if");
++			mipv6_mobile_node_moved(ifrh->ho);
++		}
++		list_del(&ifrh->list);
++		kfree(ifrh);
++	}
++	set_fs(oldfs);
++
++	if (err < 0)
++		DEBUG(DBG_WARNING, "adding of home address to a new interface %d failed %d", new_if, err);
++	else {
++		DEBUG(DBG_WARNING, "adding of home address to a new interface OK");
++	}
++}
++
++struct dhaad_halist {
++	struct list_head list;
++	struct in6_addr addr;
++	int retry;
++};
++
++/* clear all has from candidate list.  do this when a new dhaad reply
++ * is received. */
++int mipv6_mn_flush_ha_candidate(struct list_head *ha)
++{
++	struct list_head *p, *tmp;
++	struct dhaad_halist *e;
++
++	list_for_each_safe(p, tmp, ha) {
++		e = list_entry(p, struct dhaad_halist, list);
++		list_del(p);
++		kfree(e);
++		e = NULL;
++	}
++	return 0;
++}
++
++/* add new ha to candidates. only done when dhaad reply is received. */
++int mipv6_mn_add_ha_candidate(struct list_head *ha, struct in6_addr *addr)
++{
++	struct dhaad_halist *e;
++
++	e = kmalloc(sizeof(*e), GFP_ATOMIC);
++	memset(e, 0, sizeof(*e));
++	ipv6_addr_copy(&e->addr, addr);
++
++	list_add_tail(&e->list, ha);
++	return 0;
++}
++
++#define MAX_RETRIES_PER_HA 3
++
++/* get next ha candidate.  this is done when dhaad reply has been
++ * received and we want to register with the best available ha. */
++int mipv6_mn_get_ha_candidate(struct list_head *ha, struct in6_addr *addr)
++{
++	struct list_head *p;
++
++	list_for_each(p, ha) {
++		struct dhaad_halist *e;
++		e = list_entry(p, typeof(*e), list);
++		if (e->retry >= 0 && e->retry < MAX_RETRIES_PER_HA) {
++			ipv6_addr_copy(addr, &e->addr);
++			return 0;
++		}
++	}
++	return -1;
++}
++
++/* change candidate status.  if registration with ha fails, we
++ * increase retry for ha candidate.  if retry is >= 3 we set it to -1
++ * (failed), do get_ha_candidate() again */
++int mipv6_mn_try_ha_candidate(struct list_head *ha, struct in6_addr *addr)
++{
++	struct list_head *p;
++
++	list_for_each(p, ha) {
++		struct dhaad_halist *e;
++		e = list_entry(p, typeof(*e), list);
++		if (ipv6_addr_cmp(addr, &e->addr) == 0) {
++			if (e->retry >= MAX_RETRIES_PER_HA) e->retry = -1;
++			else if (e->retry >= 0) e->retry++;
++			return 0;
++		}
++	}
++	return -1;
++}
++
++/**
++ * mipv6_mn_get_bulifetime - Get lifetime for a binding update
++ * @home_addr: home address for BU 
++ * @coa: care-of address for BU
++ * @flags: flags used for BU 
++ *
++ * Returns maximum lifetime for BUs determined by the lifetime of
++ * care-of address and the lifetime of home address.
++ **/
++__u32 mipv6_mn_get_bulifetime(struct in6_addr *home_addr, struct in6_addr *coa,
++			      __u8 flags)
++{
++	struct inet6_ifaddr *ifp_hoa, *ifp_coa;
++	__u32 lifetime = (flags & MIPV6_BU_F_HOME ? 
++			  HA_BU_DEF_LIFETIME : CN_BU_DEF_LIFETIME); 
++
++	ifp_hoa = ipv6_get_ifaddr(home_addr, NULL);
++	if(!ifp_hoa) {
++		DEBUG(DBG_INFO, "home address missing");
++		return 0;
++	}
++	if (!(ifp_hoa->flags & IFA_F_PERMANENT)){
++		if (ifp_hoa->valid_lft)
++			lifetime = min_t(__u32, lifetime, ifp_hoa->valid_lft);
++		else
++			DEBUG(DBG_ERROR, "Zero lifetime for home address");
++	}
++	in6_ifa_put(ifp_hoa);
++
++	ifp_coa = ipv6_get_ifaddr(coa, NULL);
++	if (!ifp_coa) { 
++		DEBUG(DBG_INFO, "care-of address missing");
++		return 0;
++	}
++	if (!(ifp_coa->flags & IFA_F_PERMANENT)) {
++		if(ifp_coa->valid_lft)
++			lifetime = min_t(__u32, lifetime, ifp_coa->valid_lft);
++		else
++			DEBUG(DBG_ERROR, 
++			      "Zero lifetime for care-of address");
++	}
++	in6_ifa_put(ifp_coa);
++
++	DEBUG(DBG_INFO, "Lifetime for binding is %ld", lifetime);
++	return lifetime;
++}
++
++static int 
++mipv6_mn_tnl_rcv_send_bu_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	struct ipv6hdr *inner;
++	struct ipv6hdr *outer = skb->nh.ipv6h; 
++	struct mn_info *minfo = NULL;
++	__u32 lifetime;
++	__u8 user_flags = 0;
++
++	DEBUG_FUNC();
++
++	if (!is_mip6_tnl(t))
++		return IP6_TNL_ACCEPT;
++
++	if (!mip6node_cnf.accept_ret_rout) {
++		DEBUG(DBG_INFO, "Return routability administratively disabled" 
++		      " not doing route optimization");
++		return IP6_TNL_ACCEPT;
++	}
++	if (!pskb_may_pull(skb, skb->h.raw-skb->data+sizeof(*inner)))
++		return IP6_TNL_DROP;
++
++	inner = (struct ipv6hdr *)skb->h.raw;
++	
++	read_lock(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_home(&inner->daddr);
++
++	if (!minfo) {
++		DEBUG(DBG_WARNING, "MN info missing");
++		read_unlock(&mn_info_lock);
++		return IP6_TNL_ACCEPT;
++	}
++	DEBUG(DBG_DATADUMP, "MIPV6 MN: Received a tunneled IPv6 packet"
++	      " to %x:%x:%x:%x:%x:%x:%x:%x,"
++	      " from %x:%x:%x:%x:%x:%x:%x:%x with\n tunnel header"
++	      "daddr: %x:%x:%x:%x:%x:%x:%x:%x,"
++	      "saddr: %x:%x:%x:%x:%x:%x:%x:%x", 
++	       NIPV6ADDR(&inner->daddr), NIPV6ADDR(&inner->saddr),
++	       NIPV6ADDR(&outer->daddr), NIPV6ADDR(&outer->saddr));
++	
++	spin_lock(&minfo->lock);
++
++	/* We don't send bus in response to all tunneled packets */
++
++        if (!ipv6_addr_cmp(&minfo->ha, &inner->saddr)) {
++		spin_unlock(&minfo->lock);
++		read_unlock(&mn_info_lock);
++                DEBUG(DBG_ERROR, "HA BUG: Received a tunneled packet "
++		      "originally sent by home agent, not sending BU");
++		return IP6_TNL_ACCEPT;
++        }
++	spin_unlock(&minfo->lock);
++	read_unlock(&mn_info_lock);
++
++	DEBUG(DBG_DATADUMP, "Sending BU to correspondent node");
++
++	user_flags |= mip6node_cnf.bu_cn_ack ? MIPV6_BU_F_ACK : 0;
++
++	if (inner->nexthdr != IPPROTO_DSTOPTS && 
++	    inner->nexthdr != IPPROTO_MOBILITY) {
++		struct in6_addr coa;
++		/* Don't start RR when receiving ICMP error messages */
++		if (inner->nexthdr == IPPROTO_ICMPV6) {
++			int ptr = (u8*)(inner+1) - skb->data;
++			u8 type;
++
++			if (skb_copy_bits(skb,
++					  ptr+offsetof(struct icmp6hdr,
++						       icmp6_type),
++					  &type, 1)
++			    || !(type & ICMPV6_INFOMSG_MASK)) {
++				return IP6_TNL_ACCEPT;
++			}
++		}
++		lifetime = mipv6_mn_get_bulifetime(&inner->daddr,
++						   &outer->daddr, 0); 
++		if (lifetime && 
++		    !mipv6_get_care_of_address(&inner->daddr, &coa)) {
++			write_lock(&bul_lock);
++			mipv6_send_bu(&inner->daddr, &inner->saddr, &coa,
++				      INITIAL_BINDACK_TIMEOUT,
++				      MAX_BINDACK_TIMEOUT, 1, 
++				      user_flags,
++				      lifetime, NULL);
++			write_unlock(&bul_lock);
++		}
++	}
++	DEBUG(DBG_DATADUMP, "setting rcv_tunnel flag in skb");
++	skb->security |= MIPV6_RCV_TUNNEL;
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_mn_tnl_rcv_send_bu_ops = {
++	{NULL, NULL}, 
++	IP6_TNL_PRE_DECAP,
++	IP6_TNL_PRI_FIRST,
++	mipv6_mn_tnl_rcv_send_bu_hook
++};
++
++static int
++mipv6_mn_tnl_xmit_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_encapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_mn_tnl_xmit_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_ENCAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_mn_tnl_xmit_stats_hook
++};
++
++static int
++mipv6_mn_tnl_rcv_stats_hook(struct ip6_tnl *t, struct sk_buff *skb)
++{
++	DEBUG_FUNC();	
++	if (is_mip6_tnl(t))
++		MIPV6_INC_STATS(n_decapsulations);
++	return IP6_TNL_ACCEPT;
++}
++
++static struct ip6_tnl_hook_ops mipv6_mn_tnl_rcv_stats_ops = {
++	{NULL, NULL},
++	IP6_TNL_PRE_DECAP,
++	IP6_TNL_PRI_LAST,
++	mipv6_mn_tnl_rcv_stats_hook
++};
++
++static void mn_check_tunneled_packet(struct sk_buff *skb)
++{
++	DEBUG_FUNC();
++	/* If tunnel flag was set */
++	if (skb->security & MIPV6_RCV_TUNNEL) {
++		struct in6_addr coa; 
++		__u32 lifetime;
++		__u8 user_flags = 0;
++		int ptr = (u8*)(skb->nh.ipv6h+1) - skb->data;
++		int len = skb->len - ptr;
++		__u8 nexthdr = skb->nh.ipv6h->nexthdr;
++
++		if (len < 0)
++			return;
++
++		ptr = ipv6_skip_exthdr(skb, ptr, &nexthdr, len);
++		if (ptr < 0)
++			return;
++
++		if (!mip6node_cnf.accept_ret_rout) {
++			DEBUG(DBG_INFO, "Return routability administratively disabled");
++			return;
++		}
++		if (nexthdr == IPPROTO_MOBILITY)
++			return;
++	      
++		/* Don't start RR when receiving ICMP error messages */
++		if (nexthdr == IPPROTO_ICMPV6) {
++			u8 type;
++
++			if (skb_copy_bits(skb,
++					  ptr+offsetof(struct icmp6hdr,
++						       icmp6_type),
++					  &type, 1)
++			    || !(type & ICMPV6_INFOMSG_MASK)) {
++				return;
++			}
++		}
++		user_flags |= mip6node_cnf.bu_cn_ack ? MIPV6_BU_F_ACK : 0;
++		mipv6_get_care_of_address(&skb->nh.ipv6h->daddr, &coa);
++		lifetime = mipv6_mn_get_bulifetime(&skb->nh.ipv6h->daddr,
++ 							 &coa, 0); 
++
++		DEBUG(DBG_WARNING, "packet to address %x:%x:%x:%x:%x:%x:%x:%x"
++		      "was tunneled. Sending BU to CN" 
++		      "%x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(&skb->nh.ipv6h->daddr),
++		      NIPV6ADDR(&skb->nh.ipv6h->saddr)); 
++		/* This should work also with home address option */
++		
++		write_lock(&bul_lock);
++		mipv6_send_bu(&skb->nh.ipv6h->daddr, &skb->nh.ipv6h->saddr, 
++			      &coa, INITIAL_BINDACK_TIMEOUT,
++			      MAX_BINDACK_TIMEOUT, 1, user_flags,
++			      lifetime, NULL);
++		write_unlock(&bul_lock);
++	}
++}
++
++static int sched_mv_home_addr_task(struct in6_addr *haddr, int plen_new, 
++				   int newif, int oldif, struct handoff *ho)
++{
++	int alloc_size;
++	struct ifr_holder *ifrh;
++
++	alloc_size = sizeof(*ifrh) + (ho ? sizeof(*ho): 0);
++	if ((ifrh = kmalloc(alloc_size, GFP_ATOMIC)) == NULL) {
++		DEBUG(DBG_ERROR, "Out of memory");
++		return -1;
++	} 
++	if (ho) {
++		ifrh->ho = (struct handoff *)((struct ifr_holder *)(ifrh + 1));
++		memcpy(ifrh->ho, ho, sizeof(*ho));
++	} else 
++		ifrh->ho = NULL;
++
++	/* must queue task to avoid deadlock with rtnl */
++	ifrh->ifr.ifr6_ifindex = newif;
++	ifrh->ifr.ifr6_prefixlen = plen_new;
++	ipv6_addr_copy(&ifrh->ifr.ifr6_addr, haddr);
++	ifrh->old_ifi = oldif;
++	
++	spin_lock_bh(&ifrh_lock);
++	list_add_tail(&ifrh->list, &ifrh_list);
++	spin_unlock_bh(&ifrh_lock);
++
++	schedule_task(&mv_home_addr_task);
++
++	return 0;
++}
++
++static void send_ret_home_ns(struct in6_addr *ha_addr, 
++			     struct in6_addr *home_addr,
++			     int ifindex)
++{
++	struct in6_addr nil;
++	struct in6_addr mcaddr;
++	struct net_device *dev = dev_get_by_index(ifindex);
++	if (!dev)
++		return;
++	memset(&nil, 0, sizeof(nil));
++	addrconf_addr_solict_mult(home_addr, &mcaddr);
++	ndisc_send_ns(dev, NULL, home_addr, &mcaddr, &nil); 
++	dev_put(dev);
++}
++
++static inline int ha_is_reachable(int ifindex, struct in6_addr *ha)
++{
++	struct net_device *dev;
++	int reachable = 0;
++
++	dev = dev_get_by_index(ifindex);
++	if (dev) {
++		struct neighbour *neigh;
++		if ((neigh = ndisc_get_neigh(dev, ha)) != NULL) {
++			read_lock_bh(&neigh->lock);
++			if (neigh->nud_state&NUD_VALID)
++				reachable = 1;
++			read_unlock_bh(&neigh->lock);
++			neigh_release(neigh);
++		}
++		dev_put(dev);
++	}
++	return reachable;
++}
++
++static int mn_ha_handoff(struct handoff *ho)
++{
++	struct list_head *lh;
++	struct mn_info *minfo;
++	struct in6_addr *coa= ho->coa;
++	int wait_mv_home = 0; 
++
++	read_lock_bh(&mn_info_lock);
++	list_for_each(lh, &mn_info_list) {
++		__u8 has_home_reg;
++		int ifindex;
++		struct in6_addr ha;
++		__u8 athome;
++		__u32 lifetime;
++		struct mipv6_bul_entry *entry = NULL;
++		
++		minfo = list_entry(lh, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		has_home_reg = minfo->has_home_reg;
++		ifindex = minfo->ifindex;
++		ipv6_addr_copy(&ha, &minfo->ha);
++		
++		if (mipv6_prefix_compare(&ho->rtr_addr, &minfo->home_addr,
++					 ho->plen)) {
++			if (minfo->has_home_reg)
++				athome = minfo->is_at_home = MN_RETURNING_HOME;
++			else
++				athome = minfo->is_at_home = MN_AT_HOME;
++			coa = &minfo->home_addr;
++
++			spin_unlock(&minfo->lock);
++#if 0			
++			/* Cancel prefix solicitation, rtr is our HA */
++			mipv6_pfx_cancel_send(&ho->rtr_addr, ifindex);
++#endif			
++			minfo->ifindex = ho->ifindex;
++
++			if (minfo->has_home_reg && 
++			    !ha_is_reachable(ho->ifindex, &minfo->ha)) {
++				send_ret_home_ns(&minfo->ha,
++						 &minfo->home_addr, 
++						 ho->ifindex);
++				mipv6_mdet_set_curr_rtr_reachable(0);
++				wait_mv_home++;
++			}
++			if (ifindex != ho->ifindex){
++				wait_mv_home++;
++				DEBUG(DBG_INFO, 
++				      "Moving home address back to "
++				      "the home interface");
++				sched_mv_home_addr_task(&minfo->home_addr, 
++							128,
++							ho->ifindex, 
++							ifindex, ho);
++			}
++			if (!has_home_reg || wait_mv_home)
++				continue;
++			
++			lifetime = 0;
++
++		} else {
++			athome = minfo->is_at_home = MN_NOT_AT_HOME;
++			if (minfo->ifindex_user != minfo->ifindex) {
++				DEBUG(DBG_INFO, "Scheduling home address move to virtual interface");
++				sched_mv_home_addr_task(&minfo->home_addr, 
++							128,
++							minfo->ifindex_user, 
++							minfo->ifindex, ho); /* Is minfo->ifindex correct */
++				
++				wait_mv_home++;
++			}
++			minfo->ifindex = minfo->ifindex_user;
++			spin_unlock(&minfo->lock);
++			if (wait_mv_home)
++				continue;
++			if (!has_home_reg &&
++			    init_home_registration(&minfo->home_addr, 
++						   ho->coa)) {
++				continue;
++			}
++			lifetime = mipv6_mn_get_bulifetime(&minfo->home_addr, 
++							   ho->coa,
++							   MIPV6_BU_F_HOME);
++			
++		}
++		write_lock(&bul_lock);
++		if (!(entry = mipv6_bul_get(&ha, &minfo->home_addr)) ||
++		    !(entry->flags & MIPV6_BU_F_HOME)) {
++			DEBUG(DBG_ERROR, 
++			      "Unable to find home registration for "
++			      "home address: %x:%x:%x:%x:%x:%x:%x:%x!\n",
++			      NIPV6ADDR(&minfo->home_addr));
++			write_unlock(&bul_lock);
++			continue;
++		}
++		DEBUG(DBG_INFO, "Sending home de ? %d registration for "
++		      "home address: %x:%x:%x:%x:%x:%x:%x:%x\n" 
++		      "to home agent %x:%x:%x:%x:%x:%x:%x:%x, "
++		      "with lifetime %ld", 
++		      (athome != MN_NOT_AT_HOME),  
++		      NIPV6ADDR(&entry->home_addr), 
++		      NIPV6ADDR(&entry->cn_addr), lifetime);
++		mipv6_send_bu(&entry->home_addr, &entry->cn_addr, 
++			      coa, INITIAL_BINDACK_TIMEOUT, 
++			      MAX_BINDACK_TIMEOUT, 1, entry->flags, 
++			      lifetime, NULL);
++		write_unlock(&bul_lock);
++
++	}
++	read_unlock_bh(&mn_info_lock);
++	return wait_mv_home;
++}
++/**
++ * mn_cn_handoff - called for every bul entry to send BU to CN
++ * @rawentry: bul entry
++ * @args: handoff event
++ * @sortkey:
++ *
++ * Since MN can have many home addresses and home networks, every BUL
++ * entry needs to be checked
++ **/
++int mn_cn_handoff(void *rawentry, void *args, unsigned long *sortkey)
++{
++	struct mipv6_bul_entry *entry = (struct mipv6_bul_entry *)rawentry;
++	struct in6_addr *coa = (struct in6_addr *)args;
++
++	DEBUG_FUNC();
++
++	/* Home registrations already handled by mn_ha_handoff */
++	if (entry->flags & MIPV6_BU_F_HOME)
++		return ITERATOR_CONT;
++
++	/* BUL is locked by mipv6_mobile_node_moved which calls us 
++	   through mipv6_bul_iterate */
++
++	if (mipv6_prefix_compare(coa, 
++				 &entry->home_addr,
++				 64)) {
++		mipv6_send_bu(&entry->home_addr, &entry->cn_addr, 
++			      &entry->home_addr, INITIAL_BINDACK_TIMEOUT, 
++			      MAX_BINDACK_TIMEOUT, 1, entry->flags, 0, 
++			      NULL);
++	} else {
++		u32 lifetime = mipv6_mn_get_bulifetime(&entry->home_addr, 
++						       coa,
++						       entry->flags);
++		mipv6_send_bu(&entry->home_addr, &entry->cn_addr,
++                              coa, INITIAL_BINDACK_TIMEOUT,
++			      MAX_BINDACK_TIMEOUT, 1, entry->flags,
++			      lifetime, NULL);
++	}
++	return ITERATOR_CONT;
++}
++
++
++int mn_bul_invalidate(void *rawentry, void *args, unsigned long *sortkey)
++{
++	struct mipv6_bul_entry *bul = (struct mipv6_bul_entry *)rawentry;
++	struct bul_inval_args *arg = (struct bul_inval_args *)args;
++
++	DEBUG_FUNC();
++
++	if (!ipv6_addr_cmp(arg->cn, &bul->cn_addr) &&
++	    (!ipv6_addr_cmp(arg->mn, &bul->home_addr) ||
++	     !ipv6_addr_cmp(arg->mn, &bul->coa))) {
++		if (arg->all_rr_states || !bul->rr ||
++		    (bul->rr->rr_state != RR_INIT && 
++		     bul->rr->rr_state != RR_DONE)) {
++			bul->state = ACK_ERROR;
++			bul->callback = bul_entry_expired;
++			bul->callback_time = jiffies +
++				DUMB_CN_BU_LIFETIME * HZ;
++			bul->expire = bul->callback_time;
++			DEBUG(DBG_INFO, "BUL entry set to ACK_ERROR");
++			mipv6_bul_reschedule(bul);
++		}
++	}
++	return ITERATOR_CONT;
++}
++/**
++ * init_home_registration - start Home Registration process
++ * @home_addr: home address
++ * @coa: care-of address
++ *
++ * Checks whether we have a Home Agent address for this home address.
++ * If not starts Dynamic Home Agent Address Discovery.  Otherwise
++ * tries to register with home agent if not already registered.
++ * Returns 1, if home registration process is started and 0 otherwise
++ **/
++int init_home_registration(struct in6_addr *home_addr, struct in6_addr *coa)
++{
++	struct mn_info *hinfo;
++	struct in6_addr ha;
++	__u8 man_conf;
++	int ifindex;
++	__u32 lifetime;
++	__u8 user_flags = 0, flags;
++
++	DEBUG_FUNC();
++
++	read_lock_bh(&mn_info_lock);
++        if ((hinfo = mipv6_mninfo_get_by_home(home_addr)) == NULL) {
++                DEBUG(DBG_ERROR, "No mn_info found for address: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x",
++		      NIPV6ADDR(home_addr));
++		read_unlock_bh(&mn_info_lock);
++                return -ENOENT;
++        }
++	spin_lock(&hinfo->lock);
++	if (mipv6_prefix_compare(&hinfo->home_addr, coa, hinfo->home_plen)) { 
++		spin_unlock(&hinfo->lock);
++		read_unlock_bh(&mn_info_lock);
++		DEBUG(DBG_INFO, "Adding home address, MN at home");
++		return 1;
++	}
++        if (ipv6_addr_any(&hinfo->ha)) {
++                int dhaad_id = mipv6_get_dhaad_id();
++                hinfo->dhaad_id = dhaad_id;
++		spin_unlock(&hinfo->lock);
++                mipv6_icmpv6_send_dhaad_req(home_addr, hinfo->home_plen, dhaad_id);
++		read_unlock_bh(&mn_info_lock);
++                DEBUG(DBG_INFO,
++		      "Home Agent address not set, initiating DHAAD");
++                return 1;
++        }
++        ipv6_addr_copy(&ha, &hinfo->ha);
++        man_conf = hinfo->man_conf;
++        ifindex = hinfo->ifindex;
++	spin_unlock(&hinfo->lock);
++	read_unlock_bh(&mn_info_lock);
++#if 0	
++	if (man_conf)
++		mipv6_pfx_add_ha(&ha, coa, ifindex);
++#endif	
++	if (mipv6_bul_exists(&ha, home_addr)) {
++		DEBUG(DBG_INFO, "BU already sent to HA");
++		return 0;
++	}
++	/* user flags received through sysctl */
++	user_flags |= mip6node_cnf.bu_lladdr ? MIPV6_BU_F_LLADDR : 0;
++	user_flags |= mip6node_cnf.bu_keymgm ? MIPV6_BU_F_KEYMGM : 0;
++
++	flags = MIPV6_BU_F_HOME | MIPV6_BU_F_ACK | user_flags;
++
++	lifetime = mipv6_mn_get_bulifetime(home_addr, coa, flags);
++
++	DEBUG(DBG_INFO, "Sending initial home registration for "
++	      "home address: %x:%x:%x:%x:%x:%x:%x:%x\n" 
++	      "to home agent %x:%x:%x:%x:%x:%x:%x:%x, "
++	      "with lifetime %ld, prefixlength %d",   
++	      NIPV6ADDR(home_addr), NIPV6ADDR(&ha), lifetime, 0);
++
++	write_lock_bh(&bul_lock);
++	mipv6_send_bu(home_addr, &ha, coa, INITIAL_BINDACK_DAD_TIMEOUT,
++		      MAX_BINDACK_TIMEOUT, 1, flags, lifetime, NULL);
++	write_unlock_bh(&bul_lock);
++
++	return 1;
++}
++
++/**
++ * mipv6_mobile_node_moved - Send BUs to all HAs and CNs
++ * @ho: handoff structure contains the new and previous routers
++ *
++ * Event for handoff.  Sends BUs everyone on Binding Update List.
++ **/
++int mipv6_mobile_node_moved(struct handoff *ho)
++{
++#if 0
++	int bu_to_prev_router = 1;
++#endif
++	int dummy;
++
++	DEBUG_FUNC();
++
++	ma_ctl_upd_iface(ho->ifindex, 
++			 MA_IFACE_CURRENT | MA_IFACE_HAS_ROUTER, &dummy);
++
++	/* First send BU to HA, then to all other nodes that are on BU list */
++	if (mn_ha_handoff(ho) != 0)
++		return 0; /* Wait for move home address task */
++#if 0	 
++	/* Add current care-of address to mn_info list, if current router acts 
++	   as a HA.*/ 
++
++	if (ho->home_address && bu_to_prev_router) 
++		mipv6_mninfo_add(ho->coa, ho->plen, 
++				 MN_AT_HOME, 0, &ho->rtr_addr, 
++				 ho->plen, ROUTER_BU_DEF_LIFETIME,
++				 0);
++				  
++#endif
++	return 0;		
++}
++
++/**
++ * mipv6_mn_send_home_na - send NA when returning home
++ * @haddr: home address to advertise
++ *
++ * After returning home, MN must advertise all its valid addresses in
++ * home link to all nodes.
++ **/
++void mipv6_mn_send_home_na(struct in6_addr *haddr)
++{
++	struct net_device *dev = NULL;
++	struct in6_addr mc_allnodes;
++	struct mn_info *hinfo = NULL;
++ 
++	read_lock(&mn_info_lock);
++	hinfo = mipv6_mninfo_get_by_home(haddr);
++	if (!hinfo) {
++		read_unlock(&mn_info_lock);
++		return;
++	}
++	spin_lock(&hinfo->lock);
++	hinfo->is_at_home = MN_AT_HOME;
++	dev = dev_get_by_index(hinfo->ifindex);
++	spin_unlock(&hinfo->lock);
++	read_unlock(&mn_info_lock);
++	if (dev == NULL) {
++		DEBUG(DBG_ERROR, "Send home_na: device not found.");
++		return;
++	}
++	
++	ipv6_addr_all_nodes(&mc_allnodes);
++	ndisc_send_na(dev, NULL, &mc_allnodes, haddr, 0, 0, 1, 1);
++	dev_put(dev);
++}
++
++static int mn_use_hao(struct in6_addr *daddr, struct in6_addr *saddr)
++{
++	struct mipv6_bul_entry *entry;
++	struct mn_info *minfo = NULL;
++	int add_ha = 0;
++
++	read_lock_bh(&mn_info_lock);
++	minfo = mipv6_mninfo_get_by_home(saddr);
++	if (minfo && minfo->is_at_home != MN_AT_HOME) {
++		read_lock_bh(&bul_lock);
++		if ((entry = mipv6_bul_get(daddr, saddr)) == NULL) {
++			read_unlock_bh(&bul_lock);
++			read_unlock_bh(&mn_info_lock);
++			return add_ha;
++		}
++		add_ha = (entry->state != ACK_ERROR &&
++			  (!entry->rr || entry->rr->rr_state == RR_DONE || 
++			   entry->flags & MIPV6_BU_F_HOME));
++		read_unlock_bh(&bul_lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++	return add_ha;
++}
++
++static int 
++mn_dev_event(struct notifier_block *nb, unsigned long event, void *ptr)
++{
++	struct net_device *dev = ptr;
++	struct list_head *lh;
++	struct mn_info *minfo;
++	int newif = 0;
++
++	/* here are probably the events we need to worry about */
++	switch (event) {
++	case NETDEV_UP:
++		DEBUG(DBG_DATADUMP, "New netdevice %s registered.", dev->name);
++		if (dev->type != ARPHRD_LOOPBACK && !dev_is_mip6_tnl(dev)) 
++			ma_ctl_add_iface(dev->ifindex);
++			
++		break;
++	case NETDEV_GOING_DOWN:
++		DEBUG(DBG_DATADUMP, "Netdevice %s disappeared.", dev->name);
++		/* 
++		 * Go through mn_info list and move all home addresses on the
++		 * netdev going down to a new device. This will make it 
++                 * practically impossible for the home address to return home,
++		 * but allow MN to retain its connections using the address.
++		 */
++
++		read_lock_bh(&mn_info_lock);
++		list_for_each(lh, &mn_info_list) {
++			minfo = list_entry(lh, struct mn_info, list);
++			spin_lock(&minfo->lock);
++			if (minfo->ifindex == dev->ifindex) {
++				if (sched_mv_home_addr_task(&minfo->home_addr, 128, 
++							    minfo->ifindex_user, 
++							    0, NULL) < 0) {
++					minfo->ifindex = 0;
++					spin_unlock(&minfo->lock);
++					read_unlock_bh(&mn_info_lock);
++					return NOTIFY_DONE;
++				} else { 
++					minfo->ifindex = minfo->ifindex_user;
++					if (minfo->is_at_home) {
++						minfo->is_at_home = 0;
++
++					}
++					newif = minfo->ifindex_user;
++				}
++			}
++			spin_unlock(&minfo->lock);				
++		}
++		
++		read_unlock_bh(&mn_info_lock);
++	}
++	ma_ctl_upd_iface(dev->ifindex, MA_IFACE_NOT_PRESENT, &newif);
++	mipv6_mdet_del_if(dev->ifindex);
++
++	return NOTIFY_DONE;
++}
++
++struct notifier_block mipv6_mn_dev_notifier = {
++	mn_dev_event,
++	NULL,
++	0 /* check if using zero is ok */
++};
++
++static void deprecate_addr(struct mn_info *minfo)
++{
++	/*
++	 * Lookup address from IPv6 address list and set deprecated flag
++	 */
++	
++}
++
++/*
++ * Required because we can only modify addresses after the packet is
++ * constructed.  We otherwise mess with higher level protocol
++ * pseudoheaders. With strict protocol layering life would be SO much
++ * easier!  
++ */
++static unsigned int modify_xmit_addrs(unsigned int hooknum,
++				      struct sk_buff **pskb,
++				      const struct net_device *in,
++				      const struct net_device *out,
++				      int (*okfn) (struct sk_buff *))
++{
++	struct sk_buff *skb = *pskb;
++
++	DEBUG_FUNC();
++	
++	if (skb) {
++		struct ipv6hdr *hdr = skb->nh.ipv6h;
++		struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
++		struct mipv6_bul_entry *bule;
++		struct in6_addr *daddr;
++
++		if (!ipv6_addr_any(&opt->hoa))
++			daddr = &opt->hoa;
++		else
++			daddr = &hdr->daddr;
++
++		/* We don't consult bul when sending a BU to avoid deadlock, since
++		 * BUL is already locked. 
++		 */
++		
++
++		if (opt->mipv6_flags & MIPV6_SND_HAO && 
++		    !(opt->mipv6_flags & MIPV6_SND_BU)) {
++			write_lock(&bul_lock);
++			bule = mipv6_bul_get(daddr, &hdr->saddr);
++			if (!bule) {
++				write_unlock(&bul_lock);
++				return NF_ACCEPT;
++			}
++			if (!bule->rr || bule->rr->rr_state == RR_DONE || 
++			    bule->flags & MIPV6_BU_F_HOME) {
++				DEBUG(DBG_DATADUMP, 
++				      "Replace source address with CoA and reroute");
++				ipv6_addr_copy(&hdr->saddr, &bule->coa);
++				skb->nfcache |= NFC_ALTERED;
++			}
++			write_unlock(&bul_lock);
++		} else if (opt->mipv6_flags & MIPV6_SND_HAO) {
++			mipv6_get_care_of_address(&hdr->saddr, &hdr->saddr);
++			skb->nfcache |= NFC_ALTERED;
++		}
++	}
++	return NF_ACCEPT;
++}
++
++/* We set a netfilter hook so that we can modify outgoing packet's
++ * source addresses 
++ */
++struct nf_hook_ops addr_modify_hook_ops = {
++	{NULL, NULL},		/* List head, no predecessor, no successor */
++	modify_xmit_addrs,
++	PF_INET6,
++	NF_IP6_LOCAL_OUT,
++	NF_IP6_PRI_FIRST       	/* Should be of EXTREMELY high priority since we
++				 * do not want to mess with IPSec (possibly
++				 * implemented as packet filter)
++				 */
++};
++
++#define MN_INFO_LEN 77
++
++static int mn_proc_info(char *buffer, char **start, off_t offset,
++			int length)
++{
++	struct list_head *p;
++	struct mn_info *minfo;
++	int len = 0, skip = 0;
++
++	DEBUG_FUNC();
++
++	read_lock_bh(&mn_info_lock);
++	list_for_each(p, &mn_info_list) {
++		if (len < offset / MN_INFO_LEN) {
++			skip++;
++			continue;
++		}
++		if (len >= length)
++			break;
++		minfo = list_entry(p, struct mn_info, list);
++		spin_lock(&minfo->lock);
++		len += sprintf(buffer + len, "%02d %08x%08x%08x%08x %02x "
++			       "%08x%08x%08x%08x %d %d\n",
++			       minfo->ifindex,
++			       ntohl(minfo->home_addr.s6_addr32[0]),
++			       ntohl(minfo->home_addr.s6_addr32[1]),
++			       ntohl(minfo->home_addr.s6_addr32[2]),
++			       ntohl(minfo->home_addr.s6_addr32[3]),
++			       minfo->home_plen,
++			       ntohl(minfo->ha.s6_addr32[0]),
++			       ntohl(minfo->ha.s6_addr32[1]),
++			       ntohl(minfo->ha.s6_addr32[2]),
++			       ntohl(minfo->ha.s6_addr32[3]),
++			       minfo->is_at_home, minfo->has_home_reg);
++		spin_unlock(&minfo->lock);
++	}
++	read_unlock_bh(&mn_info_lock);
++
++	*start = buffer;
++	if (offset)
++		*start += offset % MN_INFO_LEN;
++
++	len -= offset % MN_INFO_LEN;
++
++	if (len > length)
++		len = length;
++	if (len < 0)
++		len = 0;
++	
++	return len;
++}
++
++int mipv6_mn_ha_nd_update(struct net_device *dev,
++			  struct in6_addr *ha, u8 *lladdr)
++{
++	int valid = 0;
++	struct neighbour *neigh;
++	if ((neigh = ndisc_get_neigh(dev, ha))) {
++		read_lock(&neigh->lock);
++		valid = neigh->nud_state & NUD_VALID;
++		read_unlock(&neigh->lock);
++		if (!valid && lladdr)
++			neigh_update(neigh, lladdr, NUD_REACHABLE, 0, 1);
++		neigh_release(neigh);
++	}
++	return valid;
++}
++
++int mipv6_mn_ha_probe(struct inet6_ifaddr *ifp, u8 *lladdr)
++{
++	struct mn_info *minfo;
++
++	if (!(minfo = mipv6_mninfo_get_by_home(&ifp->addr)) ||
++	    ipv6_addr_any(&minfo->ha))
++		return 0;
++
++	if (mipv6_mn_ha_nd_update(ifp->idev->dev, &minfo->ha, lladdr))
++		mipv6_mdet_retrigger_ho();
++	return 1;
++}
++
++int __init mipv6_mn_init(void)
++{
++	struct net_device *dev;
++
++	DEBUG_FUNC();
++
++	if (mipv6_add_tnl_to_ha())
++		return -ENODEV;
++
++	mipv6_bul_init(MIPV6_BUL_SIZE);
++	mip6_fn.mn_use_hao = mn_use_hao;
++	mip6_fn.mn_check_tunneled_packet = mn_check_tunneled_packet;
++	INIT_TQUEUE(&mv_home_addr_task, mv_home_addr, NULL);
++
++	ma_ctl_init();
++	for (dev = dev_base; dev; dev = dev->next) {
++		if (dev->flags & IFF_UP && 
++		    dev->type != ARPHRD_LOOPBACK && !dev_is_mip6_tnl(dev)) {
++			ma_ctl_add_iface(dev->ifindex);
++		}
++	} 
++	DEBUG(DBG_INFO, "Multiaccess support initialized");
++
++	register_netdevice_notifier(&mipv6_mn_dev_notifier);
++	register_inet6addr_notifier(&mipv6_mn_inet6addr_notifier);
++
++	ip6ip6_tnl_register_hook(&mipv6_mn_tnl_rcv_send_bu_ops);
++	ip6ip6_tnl_register_hook(&mipv6_mn_tnl_xmit_stats_ops);
++	ip6ip6_tnl_register_hook(&mipv6_mn_tnl_rcv_stats_ops);
++
++	MIPV6_SETCALL(mipv6_set_home, mipv6_mn_set_home);
++
++	mipv6_initialize_mdetect();
++
++	/* COA to home transformation hook */
++	MIPV6_SETCALL(mipv6_get_home_address, mipv6_get_saddr_hook);
++	MIPV6_SETCALL(mipv6_mn_ha_probe, mipv6_mn_ha_probe);
++	MIPV6_SETCALL(mipv6_is_home_addr, mipv6_mn_is_home_addr);
++	proc_net_create("mip6_mninfo", 0, mn_proc_info);
++	/* Set packet modification hook (source addresses) */
++	nf_register_hook(&addr_modify_hook_ops);
++
++	return 0;
++}
++
++void __exit mipv6_mn_exit(void)
++{
++	struct list_head *lh, *tmp;
++	struct mn_info *minfo;
++	DEBUG_FUNC();
++	
++	mip6_fn.mn_use_hao = NULL;
++	mip6_fn.mn_check_tunneled_packet = NULL;
++	
++	MIPV6_RESETCALL(mipv6_set_home);
++	MIPV6_RESETCALL(mipv6_get_home_address);
++	MIPV6_RESETCALL(mipv6_mn_ha_probe);
++	MIPV6_RESETCALL(mipv6_is_home_addr);
++	nf_unregister_hook(&addr_modify_hook_ops);
++	proc_net_remove("mip6_mninfo");
++	mipv6_shutdown_mdetect();
++	ip6ip6_tnl_unregister_hook(&mipv6_mn_tnl_rcv_stats_ops);
++	ip6ip6_tnl_unregister_hook(&mipv6_mn_tnl_xmit_stats_ops);
++	ip6ip6_tnl_unregister_hook(&mipv6_mn_tnl_rcv_send_bu_ops);
++	ma_ctl_clean();
++
++	unregister_inet6addr_notifier(&mipv6_mn_inet6addr_notifier);
++	unregister_netdevice_notifier(&mipv6_mn_dev_notifier);
++	write_lock_bh(&mn_info_lock);
++
++	list_for_each_safe(lh, tmp, &mn_info_list) {
++		minfo = list_entry(lh, struct mn_info, list);
++		if (minfo->is_at_home == MN_NOT_AT_HOME) 
++			deprecate_addr(minfo);
++		list_del(&minfo->list);
++		kfree(minfo);
++	}
++	write_unlock_bh(&mn_info_lock);
++	mipv6_bul_exit();
++	flush_scheduled_tasks();
++	mipv6_del_tnl_to_ha();
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mn.h
+@@ -0,0 +1,96 @@
++/*
++ *      MIPL Mobile IPv6 Mobile Node header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MN_H
++#define _MN_H
++
++#include <linux/in6.h>
++
++/* constants for sending of BUs*/
++#define HA_BU_DEF_LIFETIME 10000
++#define CN_BU_DEF_LIFETIME 420 /* Max lifetime for RR bindings from RFC 3775 */
++#define DUMB_CN_BU_LIFETIME 600 /* BUL entry lifetime in case of dumb CN */
++#define ROUTER_BU_DEF_LIFETIME 30 /* For packet forwarding from previous coa */
++#define ERROR_DEF_LIFETIME DUMB_CN_BU_LIFETIME
++
++extern rwlock_t mn_info_lock;
++
++#define MN_NOT_AT_HOME 0
++#define MN_RETURNING_HOME 1
++#define MN_AT_HOME 2
++
++/*
++ * Mobile Node information record
++ */
++struct mn_info {
++	struct in6_addr home_addr;
++	struct in6_addr ha;
++	__u8 home_plen;
++	__u8 is_at_home;
++	__u8 has_home_reg;
++	__u8 man_conf;
++	int ifindex;
++	int ifindex_user; 
++	unsigned long home_addr_expires;
++	unsigned short dhaad_id;
++	struct list_head list;
++	spinlock_t lock;
++};
++
++/* prototypes for interface functions */
++int mipv6_mn_init(void);
++void mipv6_mn_exit(void);
++
++struct handoff;
++
++/* Interface to movement detection */
++int mipv6_mobile_node_moved(struct handoff *ho);
++
++void mipv6_mn_send_home_na(struct in6_addr *haddr);
++/* Init home reg. with coa */
++int init_home_registration(struct in6_addr *home_addr, struct in6_addr *coa);
++
++/* mn_info functions that require locking by caller */
++struct mn_info *mipv6_mninfo_get_by_home(struct in6_addr *haddr);
++
++struct mn_info *mipv6_mninfo_get_by_ha(struct in6_addr *home_agent);
++
++struct mn_info *mipv6_mninfo_get_by_id(unsigned short id);
++
++/* "safe" mn_info functions */
++void mipv6_mninfo_add(int ifindex, struct in6_addr *home_addr, int plen, 
++		      int isathome, unsigned long lifetime, struct in6_addr *ha, 
++		      int ha_plen, unsigned long ha_lifetime, int man_conf);
++
++int mipv6_mninfo_del(struct in6_addr *home_addr, int del_dyn_only);
++
++void mipv6_mn_set_home_reg(struct in6_addr *home_addr, int has_home_reg);
++
++int mipv6_mn_is_at_home(struct in6_addr *addr);
++
++int mipv6_mn_is_home_addr(struct in6_addr *addr);
++
++__u32 mipv6_mn_get_bulifetime(struct in6_addr *home_addr, 
++			      struct in6_addr *coa, __u8 flags);
++int mn_cn_handoff(void *rawentry, void *args, unsigned long *sortkey);
++
++int mipv6_mn_ha_nd_update(struct net_device *dev,
++			  struct in6_addr *ha, u8 *lladdr);
++
++struct bul_inval_args {
++	int all_rr_states;
++	struct in6_addr *cn;
++	struct in6_addr *mn;
++};
++
++int mn_bul_invalidate(void *rawentry, void *args, unsigned long *sortkey);
++
++#endif /* _MN_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mobhdr.h
+@@ -0,0 +1,101 @@
++/*
++ *      MIPL Mobile IPv6 Mobility Header send and receive
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _MOBHDR_H
++#define _MOBHDR_H
++
++#include <net/mipv6.h>
++
++/* RR states for mipv6_send_bu() */
++#define RR_INIT			0x00
++#define RR_WAITH		0x01
++#define RR_WAITC		0x02
++#define RR_WAITHC		0x13
++#define RR_DONE			0x10
++
++#define MH_UNKNOWN_CN 1
++#define MH_AUTH_FAILED 2
++#define MH_SEQUENCE_MISMATCH 3
++
++struct mipv6_bul_entry;
++struct sk_buff;
++
++int mipv6_mh_common_init(void);
++void mipv6_mh_common_exit(void);
++int mipv6_mh_mn_init(void);
++void mipv6_mh_mn_exit(void);
++
++struct mipv6_mh_opt {
++	struct mipv6_mo_alt_coa		*alt_coa;
++	struct mipv6_mo_nonce_indices	*nonce_indices;
++	struct mipv6_mo_bauth_data	*auth_data;
++	struct mipv6_mo_br_advice	*br_advice;
++	int freelen;
++	int totlen;
++	u8 *next_free;
++	u8 data[0];
++};
++
++struct mobopt {
++	struct mipv6_mo_alt_coa		*alt_coa;
++	struct mipv6_mo_nonce_indices	*nonce_indices;
++	struct mipv6_mo_bauth_data	*auth_data;
++	struct mipv6_mo_br_advice	*br_advice;
++};
++
++struct mipv6_mh_opt *alloc_mh_opts(int totlen);
++int append_mh_opt(struct mipv6_mh_opt *ops, u8 type, u8 len, void *data);
++int parse_mo_tlv(void *mos, int len, struct mobopt *opts);
++int mipv6_add_pad(u8 *data, int n);
++
++struct mipv6_auth_parm {
++	struct in6_addr *coa;
++	struct in6_addr *cn_addr;
++	__u8 *k_bu;
++};
++
++int send_mh(struct in6_addr *daddr, struct in6_addr *saddr, 
++	    u8 msg_type, u8 msg_len, u8 *msg,
++	    struct in6_addr *hao_addr, struct in6_addr *rth_addr,
++	    struct mipv6_mh_opt *ops, struct mipv6_auth_parm *parm);
++
++int mipv6_mh_register(int type, int (*func)(struct sk_buff *,
++	struct in6_addr *, struct in6_addr *, 
++	struct in6_addr *, struct in6_addr *, struct mipv6_mh *));
++
++void mipv6_mh_unregister(int type);
++
++int mipv6_send_brr(struct in6_addr *saddr, struct in6_addr *daddr,
++		   struct mipv6_mh_opt *ops);
++
++int mipv6_send_bu(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *coa, __u32 initdelay, 
++		  __u32 maxackdelay, __u8 exp, __u8 flags,
++		  __u32 lifetime, struct mipv6_mh_opt *ops);
++
++int mipv6_send_be(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *home, __u8 status);
++
++int mipv6_send_ba(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *auth_coa, struct in6_addr *rep_coa,
++		  u8 status, u16 sequence, u32 lifetime, u8 *k_bu);
++
++/* Binding Authentication Data Option routines */
++#define MAX_HASH_LENGTH 20
++#define MIPV6_RR_MAC_LENGTH 12
++
++int mipv6_auth_build(struct in6_addr *cn_addr, struct in6_addr *coa, 
++		     __u8 *opt, __u8 *aud_data, __u8 *k_bu);
++
++int mipv6_auth_check(struct in6_addr *cn_addr, struct in6_addr *coa, 
++		     __u8 *opt, __u8 optlen, struct mipv6_mo_bauth_data *aud, 
++		     __u8 *k_bu);
++#endif /* _MOBHDR_H */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mobhdr_common.c
+@@ -0,0 +1,1210 @@
++/*
++ *	Mobile IPv6 Mobility Header Common Functions
++ *
++ *	Authors:
++ *	Antti Tuominen <ajtuomin@tml.hut.fi>
++ *
++ *      $Id: s.mh_recv.c 1.159 02/10/16 15:01:29+03:00 antti@traci.mipl.mediapoli.com $
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/autoconf.h>
++#include <linux/types.h>
++#include <linux/in6.h>
++#include <linux/skbuff.h>
++#include <linux/ipsec.h>
++#include <linux/init.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++#include <net/checksum.h>
++#include <net/protocol.h>
++
++#include "stats.h"
++#include "debug.h"
++#include "mobhdr.h"
++#include "bcache.h"
++
++#include "rr_crypto.h"
++#include "exthdrs.h"
++#include "config.h"
++
++#define MIPV6_MH_MAX MIPV6_MH_BE
++struct mh_proto {
++	int	(*func) (struct sk_buff *,
++			 struct in6_addr *, struct in6_addr *, 
++			 struct in6_addr *, struct in6_addr *, 
++			 struct mipv6_mh *);
++};
++
++static struct mh_proto mh_rcv[MIPV6_MH_MAX];
++
++int mipv6_mh_register(int type, int (*func)(struct sk_buff *,
++	struct in6_addr *, struct in6_addr *, 
++	struct in6_addr *, struct in6_addr *, struct mipv6_mh *))
++{
++	if (mh_rcv[type].func != NULL)
++		return -1;
++
++	mh_rcv[type].func = func;
++
++	return 0;
++}
++
++void mipv6_mh_unregister(int type)
++{
++	if (type < 0 || type > MIPV6_MH_MAX)
++		return;
++
++	mh_rcv[type].func = NULL;
++}
++
++struct socket *mipv6_mh_socket = NULL;
++
++/* TODO: Fix fragmentation */
++static int dstopts_getfrag(
++	const void *data, struct in6_addr *addr,
++	char *buff, unsigned int offset, unsigned int len)
++{
++	memcpy(buff, data + offset, len);
++	return 0;
++}
++
++struct mipv6_mh_opt *alloc_mh_opts(int totlen)
++{
++	struct mipv6_mh_opt *ops;
++
++	ops = kmalloc(sizeof(*ops) + totlen, GFP_ATOMIC);
++	if (ops == NULL)
++		return NULL;
++
++	memset(ops, 0, sizeof(*ops));
++	ops->next_free = ops->data;
++	ops->freelen = totlen;
++
++	return ops;
++}
++
++int append_mh_opt(struct mipv6_mh_opt *ops, u8 type, u8 len, void *data)
++{
++	struct mipv6_mo *mo;
++
++	if (ops->next_free == NULL) {
++		DEBUG(DBG_ERROR, "No free room for option");
++		return -ENOMEM;
++	}
++	if (ops->freelen < len + 2) {
++		DEBUG(DBG_ERROR, "No free room for option");
++		return -ENOMEM;
++	}
++	else {
++		ops->freelen -= (len + 2);
++		ops->totlen += (len + 2);
++	}
++
++	mo = (struct mipv6_mo *)ops->next_free;
++	mo->type = type;
++	mo->length = len;
++
++	switch (type) {
++	case MIPV6_OPT_ALTERNATE_COA:
++		ops->alt_coa = (struct mipv6_mo_alt_coa *)mo;
++		ipv6_addr_copy(&ops->alt_coa->addr, (struct in6_addr *)data);
++		break;
++	case MIPV6_OPT_NONCE_INDICES:
++		DEBUG(DBG_INFO, "Added nonce indices pointer");
++		ops->nonce_indices = (struct mipv6_mo_nonce_indices *)mo;
++		ops->nonce_indices->home_nonce_i = *(__u16 *)data;
++		ops->nonce_indices->careof_nonce_i = *((__u16 *)data + 1);
++		break;
++	case MIPV6_OPT_AUTH_DATA:
++		DEBUG(DBG_INFO, "Added opt auth_data pointer");
++		ops->auth_data = (struct mipv6_mo_bauth_data *)mo;
++		break;
++	case MIPV6_OPT_BIND_REFRESH_ADVICE:
++		ops->br_advice = (struct mipv6_mo_br_advice *)mo;
++		ops->br_advice->refresh_interval = htons(*(u16 *)data);
++		break;
++	default:
++		DEBUG(DBG_ERROR, "Unknow option type");
++		break;
++	}
++
++	if (ops->freelen == 0)
++		ops->next_free = NULL;
++	else
++		ops->next_free += (len + 2);
++
++	return 0;
++}
++
++/*
++ * Calculates required padding with xn + y requirement with offset
++ */
++static inline int optpad(int xn, int y, int offset)
++{
++	return ((y - offset) & (xn - 1));
++}
++
++static int option_pad(int type, int offset)
++{
++	if (type == MIPV6_OPT_ALTERNATE_COA)
++		return optpad(8, 6, offset); /* 8n + 6 */
++	if (type == MIPV6_OPT_BIND_REFRESH_ADVICE ||
++	    type == MIPV6_OPT_NONCE_INDICES)
++		return optpad(2, 0, offset); /* 2n */
++	return 0;
++}
++
++/*
++ * Add Pad1 or PadN option to data
++ */
++int mipv6_add_pad(u8 *data, int n)
++{
++	struct mipv6_mo_padn *padn;
++
++	if (n <= 0) return 0;
++	if (n == 1) {
++		*data = MIPV6_OPT_PAD1;
++		return 1;
++	}
++	padn = (struct mipv6_mo_padn *)data;
++	padn->type = MIPV6_OPT_PADN;
++	padn->length = n - 2;
++	memset(padn->data, 0, n - 2);
++	return n;
++}
++
++/*
++ * Write options to mobility header buffer
++ */
++static int prepare_mh_opts(u8 *optdata, int off, struct mipv6_mh_opt *ops)
++{
++	u8 *nextopt = optdata;
++	int offset = off, pad = 0;
++
++	if (ops == NULL) {
++		nextopt = NULL;
++		return -1;
++	}
++
++	if (ops->alt_coa) {
++		pad = option_pad(MIPV6_OPT_ALTERNATE_COA, offset);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->alt_coa, sizeof(struct mipv6_mo_alt_coa));
++		nextopt += sizeof(struct mipv6_mo_alt_coa);
++		offset += pad + sizeof(struct mipv6_mo_alt_coa);
++	}
++
++	if (ops->br_advice) {
++		pad = option_pad(MIPV6_OPT_BIND_REFRESH_ADVICE, offset);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->br_advice, sizeof(struct mipv6_mo_br_advice));
++		nextopt += sizeof(struct mipv6_mo_br_advice);
++		offset += pad + sizeof(struct mipv6_mo_br_advice);
++	}
++
++	if (ops->nonce_indices) {
++		pad = option_pad(MIPV6_OPT_NONCE_INDICES, offset);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->nonce_indices, sizeof(struct mipv6_mo_nonce_indices));
++		nextopt += sizeof(struct mipv6_mo_nonce_indices);
++		offset += pad + sizeof(struct mipv6_mo_nonce_indices);
++	}
++
++	if (ops->auth_data) {
++		/* This option should always be the last.  Header
++		 * length must be a multiple of 8 octects, so we pad
++		 * if necessary. */
++		pad = optpad(8, 0, offset + ops->auth_data->length + 2);
++		nextopt += mipv6_add_pad(nextopt, pad);
++		memcpy(nextopt, ops->auth_data, ops->auth_data->length + 2);
++		nextopt += ops->auth_data->length + 2;
++	}
++	nextopt = NULL;
++
++	return 0;
++}
++
++static int calculate_mh_opts(struct mipv6_mh_opt *ops, int mh_len)
++{
++	int offset = mh_len;
++
++	if (ops == NULL)
++		return 0;
++
++	if (ops->alt_coa)
++		offset += sizeof(struct mipv6_mo_alt_coa)
++			+ option_pad(MIPV6_OPT_ALTERNATE_COA, offset);
++
++	if (ops->br_advice)
++		offset += sizeof(struct mipv6_mo_br_advice)
++			+ option_pad(MIPV6_OPT_BIND_REFRESH_ADVICE, offset);
++
++	if (ops->nonce_indices)
++		offset += sizeof(struct mipv6_mo_nonce_indices)
++			+ option_pad(MIPV6_OPT_NONCE_INDICES, offset);
++
++	if (ops->auth_data) /* no alignment */
++		offset += ops->auth_data->length + 2;
++
++	return offset - mh_len;
++}
++
++/*
++ *
++ * Mobility Header Message send functions
++ *
++ */
++
++/**
++ * send_mh - builds and sends a MH msg
++ *
++ * @daddr: destination address for packet
++ * @saddr: source address for packet
++ * @msg_type: type of MH
++ * @msg_len: message length
++ * @msg: MH type specific data
++ * @hao_addr: home address for home address option
++ * @rth_addr: routing header address
++ * @ops: mobility options
++ * @parm: auth data
++ *
++ * Builds MH, appends the type specific msg data to the header and
++ * sends the packet with a home address option, if a home address was
++ * given. Returns 0, if everything succeeded and a negative error code
++ * otherwise.
++ **/
++int send_mh(struct in6_addr *daddr, 
++	    struct in6_addr *saddr, 
++	    u8 msg_type, u8 msg_len, u8 *msg,
++	    struct in6_addr *hao_addr,
++	    struct in6_addr *rth_addr,
++	    struct mipv6_mh_opt *ops,
++	    struct mipv6_auth_parm *parm)
++{
++	struct flowi fl;
++	struct mipv6_mh *mh; 
++	struct sock *sk = mipv6_mh_socket->sk;
++	struct ipv6_txoptions *txopt = NULL;
++	int tot_len = sizeof(struct mipv6_mh) + msg_len;
++	int padded_len = 0, txopt_len = 0;
++
++	DEBUG_FUNC();
++	/* Add length of options */
++	tot_len += calculate_mh_opts(ops, tot_len);
++	/* Needs to be a multiple of 8 octets */
++	padded_len = tot_len + optpad(8, 0, tot_len);
++
++	mh = sock_kmalloc(sk, padded_len, GFP_ATOMIC);
++	if (!mh) {
++		DEBUG(DBG_ERROR, "memory allocation failed");
++		return -ENOMEM;
++	}
++
++	memset(&fl, 0, sizeof(fl)); 
++	fl.proto = IPPROTO_MOBILITY;
++	fl.fl6_dst = daddr;
++	fl.fl6_src = saddr;
++	fl.fl6_flowlabel = 0;
++	fl.oif = sk->bound_dev_if;
++
++	if (hao_addr || rth_addr) {
++		__u8 *opt_ptr;
++
++		if (hao_addr)
++			txopt_len += sizeof(struct mipv6_dstopt_homeaddr) + 6;
++		if (rth_addr)
++			txopt_len += sizeof(struct rt2_hdr);
++
++		txopt_len += sizeof(*txopt);
++		txopt = sock_kmalloc(sk, txopt_len, GFP_ATOMIC);
++		if (txopt == NULL) {
++			DEBUG(DBG_ERROR, "No socket space left");
++			sock_kfree_s(sk, mh, padded_len);
++			return -ENOMEM;
++		}
++		memset(txopt, 0, txopt_len);
++		txopt->tot_len = txopt_len;
++		opt_ptr = (__u8 *) (txopt + 1);
++		if (hao_addr) {
++			int holen = sizeof(struct mipv6_dstopt_homeaddr) + 6;
++			txopt->dst1opt = (struct ipv6_opt_hdr *) opt_ptr;
++			txopt->opt_flen += holen;
++			opt_ptr += holen;
++			mipv6_append_dst1opts(txopt->dst1opt, saddr, 
++					      NULL, holen);
++			txopt->mipv6_flags = MIPV6_SND_HAO | MIPV6_SND_BU;
++		}
++		if (rth_addr) {
++			int rtlen = sizeof(struct rt2_hdr);
++			txopt->srcrt2 = (struct ipv6_rt_hdr *) opt_ptr;
++			txopt->opt_nflen += rtlen;
++			opt_ptr += rtlen;
++			mipv6_append_rt2hdr(txopt->srcrt2, rth_addr);
++		}
++	}
++
++	/* Fill in the fields of MH */
++	mh->payload = NEXTHDR_NONE;
++	mh->length = (padded_len >> 3) - 1;	/* Units of 8 octets - 1 */
++	mh->type = msg_type;
++	mh->reserved = 0;
++	mh->checksum = 0;
++
++	memcpy(mh->data, msg, msg_len);
++	prepare_mh_opts(mh->data + msg_len, msg_len + sizeof(*mh), ops);
++	/* If BAD is present, this is already done. */
++	mipv6_add_pad((u8 *)mh + tot_len, padded_len - tot_len);
++	
++	if (parm && parm->k_bu && ops && ops->auth_data) {
++		/* Calculate the position of the authorization data before adding checksum*/
++		mipv6_auth_build(parm->cn_addr, parm->coa, (__u8 *)mh, 
++				 (__u8 *)mh + padded_len - MIPV6_RR_MAC_LENGTH, parm->k_bu);
++	}
++	/* Calculate the MH checksum */
++	mh->checksum = csum_ipv6_magic(fl.fl6_src, fl.fl6_dst, 
++				       padded_len, IPPROTO_MOBILITY,
++				       csum_partial((char *)mh, padded_len, 0));
++	ip6_build_xmit(sk, dstopts_getfrag, mh, &fl, padded_len, txopt, 255,
++		       MSG_DONTWAIT);
++	/* dst cache must be cleared so RR messages can be routed through 
++	   different interfaces */
++	sk_dst_reset(sk);
++
++	if (txopt_len)
++		sock_kfree_s(sk, txopt, txopt_len);
++	sock_kfree_s(sk, mh, padded_len);
++	return 0;
++}
++
++/**
++ * mipv6_send_brr - send a Binding Refresh Request 
++ * @saddr: source address for BRR
++ * @daddr: destination address for BRR
++ * @ops: mobility options
++ *
++ * Sends a binding request.  On a mobile node, use the mobile node's
++ * home address for @saddr.  Returns 0 on success, negative on
++ * failure.
++ **/
++int mipv6_send_brr(struct in6_addr *saddr, struct in6_addr *daddr,
++		   struct mipv6_mh_opt *ops)
++{
++	struct mipv6_mh_brr br;
++
++	memset(&br, 0, sizeof(br));
++	/* We don't need to explicitly add a RH to brr, since it will be 
++	 * included automatically, if a BCE exists 
++	 */
++	MIPV6_INC_STATS(n_brr_sent);
++	return send_mh(daddr, saddr, MIPV6_MH_BRR, sizeof(br), (u8 *)&br,
++		       NULL, NULL, ops, NULL);
++}
++
++/**
++ * mipv6_send_ba - send a Binding Acknowledgement 
++ * @saddr: source address for BA
++ * @daddr: destination address for BA 
++ * @reply_coa: destination care-of address of MN
++ * @auth_coa: care-of address of MN used for authentication
++ * @status: status field value
++ * @sequence: sequence number from BU
++ * @lifetime: granted lifetime for binding in seconds
++ * @ops: mobility options
++ *
++ * Send a binding acknowledgement.  On a mobile node, use the mobile
++ * node's home address for saddr.  Returns 0 on success, non-zero on
++ * failure.
++ **/
++int mipv6_send_ba(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *auth_coa, struct in6_addr *rep_coa,
++		  u8 status, u16 sequence, u32 lifetime, u8 *k_bu)
++{
++	struct mipv6_mh_ba ba;
++	struct mipv6_auth_parm parm;
++	struct mipv6_mh_opt *ops = NULL; 
++	int ops_len = 0, ret = 0;
++	struct mipv6_bce bc_entry;
++	int coming_home = 0;
++	int bypass_tnl = 0;
++
++	memset(&ba, 0, sizeof(ba));
++	
++	ba.status = status;
++	ba.sequence = htons(sequence);
++	ba.lifetime = htons(lifetime >> 2);
++	
++	DEBUG(DBG_INFO, "sending a status %d BA %s authenticator to MN \n"
++	      "%x:%x:%x:%x:%x:%x:%x:%x  at care of address \n" 
++	      "%x:%x:%x:%x:%x:%x:%x:%x : with lifetime %d and \n" 
++	      " sequence number %d",
++	      status, k_bu ? "with" : "without", 
++	      NIPV6ADDR(daddr), NIPV6ADDR(auth_coa), lifetime, sequence);
++
++	memset(&parm, 0, sizeof(parm));
++	parm.coa = auth_coa;
++	parm.cn_addr = saddr;
++
++	if (k_bu) {
++		ops_len += sizeof(struct mipv6_mo_bauth_data) + 
++			MIPV6_RR_MAC_LENGTH;
++		parm.k_bu = k_bu;
++	}
++
++	if (mip6node_cnf.binding_refresh_advice) {
++		ops_len += sizeof(struct mipv6_mo_br_advice);
++	}
++	if (ops_len) {
++		ops = alloc_mh_opts(ops_len);
++		if (ops == NULL) {
++			DEBUG(DBG_WARNING, "Out of memory");
++			return -ENOMEM;
++		}
++		if (mip6node_cnf.binding_refresh_advice > 0) {
++			if (append_mh_opt(ops, MIPV6_OPT_BIND_REFRESH_ADVICE, 2,
++					  &mip6node_cnf.binding_refresh_advice) < 0) {
++				DEBUG(DBG_WARNING, "Adding BRA failed");
++				if (ops)
++					kfree(ops);
++				return -ENOMEM;
++			}
++		}
++		if (k_bu) {
++			if (append_mh_opt(ops, MIPV6_OPT_AUTH_DATA,
++					  MIPV6_RR_MAC_LENGTH, NULL) < 0) {
++				DEBUG(DBG_WARNING, "Adding BAD failed");
++				if (ops)
++					kfree(ops);
++				return -ENOMEM;
++			}
++		}
++	}
++	coming_home = !ipv6_addr_cmp(rep_coa, daddr);
++
++	bypass_tnl = (coming_home &&
++		      !mipv6_bcache_get(daddr, saddr, &bc_entry) &&
++		      bc_entry.flags&MIPV6_BU_F_HOME && 
++		      status >= 128);
++
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_del)
++		mip6_fn.bce_tnl_rt_del(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++
++	if (coming_home)
++		ret = send_mh(daddr, saddr, MIPV6_MH_BA, sizeof(ba), (u8 *)&ba,
++			      NULL, NULL, ops, &parm);
++	else
++		ret = send_mh(daddr, saddr, MIPV6_MH_BA, sizeof(ba), (u8 *)&ba,
++			      NULL, rep_coa, ops, &parm);
++
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_add)
++		mip6_fn.bce_tnl_rt_add(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++	
++	if (ret == 0) {
++		if (status < 128) {
++			MIPV6_INC_STATS(n_ba_sent);
++		} else {
++			MIPV6_INC_STATS(n_ban_sent);
++		}
++	}
++
++	if (ops)
++		kfree(ops);
++
++	return 0;
++}
++
++/**
++ * mipv6_send_be - send a Binding Error message
++ * @saddr: source address for BE
++ * @daddr: destination address for BE
++ * @home: Home Address in offending packet (if any)
++ *
++ * Sends a binding error.  On a mobile node, use the mobile node's
++ * home address for @saddr.  Returns 0 on success, negative on
++ * failure.
++ **/
++int mipv6_send_be(struct in6_addr *saddr, struct in6_addr *daddr, 
++		  struct in6_addr *home, __u8 status)
++{
++	struct mipv6_mh_be be;
++	int ret = 0;
++	struct mipv6_bce bc_entry;
++	int bypass_tnl = 0;
++
++	if (ipv6_addr_is_multicast(daddr))
++		return -EINVAL;
++
++	memset(&be, 0, sizeof(be));
++	be.status = status;
++	if (home)
++		ipv6_addr_copy(&be.home_addr, home);
++
++	if (mipv6_bcache_get(daddr, saddr, &bc_entry) == 0 &&
++	    bc_entry.flags&MIPV6_BU_F_HOME)
++		bypass_tnl = 1;
++
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_del)
++		mip6_fn.bce_tnl_rt_del(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++
++	ret = send_mh(daddr, saddr, MIPV6_MH_BE, sizeof(be), (u8 *)&be,
++		      NULL, NULL, NULL, NULL);
++	
++	if (bypass_tnl && mip6_fn.bce_tnl_rt_add)
++		mip6_fn.bce_tnl_rt_add(&bc_entry.coa,
++				       &bc_entry.our_addr,
++				       &bc_entry.home_addr);
++
++	if (ret == 0)
++		MIPV6_INC_STATS(n_be_sent);
++
++	return ret;
++}
++
++/**
++ * mipv6_send_addr_test - send a HoT or CoT message
++ * @saddr: source address
++ * @daddr: destination address
++ * @msg_type: HoT or CoT message
++ * @init: HoTI or CoTI message
++ *
++ * Send a reply to HoTI or CoTI message. 
++ **/
++static int mipv6_send_addr_test(struct in6_addr *saddr,
++				struct in6_addr *daddr,
++				int msg_type,
++				struct mipv6_mh_addr_ti *init)
++{
++	u_int8_t			*kgen_token = NULL;
++	struct mipv6_mh_addr_test       addr_test;      
++	struct mipv6_rr_nonce		*nonce;
++	struct mipv6_mh_opt *ops = NULL;
++	int ret = 0;
++
++	DEBUG_FUNC();
++
++	if ((nonce = mipv6_rr_get_new_nonce())== NULL) {
++		DEBUG(DBG_WARNING, "Nonce creation failed");
++		return 0;
++	} 
++	if (mipv6_rr_cookie_create(daddr, &kgen_token, nonce->index)) {
++		DEBUG(DBG_WARNING, "No cookie");
++		return 0;
++	}
++
++	addr_test.nonce_index = nonce->index;
++	memcpy(addr_test.init_cookie, init->init_cookie,
++			MIPV6_RR_COOKIE_LENGTH);
++	memcpy(addr_test.kgen_token, kgen_token,
++			MIPV6_RR_COOKIE_LENGTH);
++
++	/* No options defined */
++	ret = send_mh(daddr, saddr, msg_type, sizeof(addr_test),
++		      (u8 *)&addr_test, NULL, NULL, ops, NULL);
++
++	if (ret == 0) {
++		if (msg_type == MIPV6_MH_HOT) {
++			MIPV6_INC_STATS(n_hot_sent);
++		} else {
++			MIPV6_INC_STATS(n_cot_sent);
++		}
++	}
++
++	return 0;
++}
++
++static void bc_cache_add(int ifindex, struct in6_addr *daddr,
++			 struct in6_addr *haddr, struct in6_addr *coa,
++			 struct in6_addr *rep_coa, __u32 lifetime,
++			 __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	__u8 ba_status = SUCCESS;
++
++	if (lifetime >  MAX_RR_BINDING_LIFE)
++		lifetime = MAX_RR_BINDING_LIFE;
++
++	if (mipv6_bcache_add(ifindex, daddr, haddr, coa, lifetime,
++			     sequence, flags, CACHE_ENTRY) != 0) {
++		DEBUG(DBG_ERROR, "binding failed.");
++		ba_status = INSUFFICIENT_RESOURCES;
++	} 
++
++	if (flags & MIPV6_BU_F_ACK) {
++		DEBUG(DBG_INFO, "sending ack (code=%d)", ba_status);
++		mipv6_send_ba(daddr, haddr, coa, rep_coa, ba_status, sequence,
++			      lifetime, k_bu);
++	}
++}
++
++static void bc_cn_home_add(int ifindex, struct in6_addr *daddr, 
++			   struct in6_addr *haddr, struct in6_addr *coa,
++			   struct in6_addr *rep_coa, __u32 lifetime,
++			   __u16 sequence, __u8 flags, __u8 *k_bu)
++{
++	mipv6_send_ba(daddr, haddr, coa, rep_coa,
++		      HOME_REGISTRATION_NOT_SUPPORTED,
++		      sequence, lifetime, k_bu);
++}
++
++static void bc_cache_delete(struct in6_addr *daddr, struct in6_addr *haddr, 
++			    struct in6_addr *coa, struct in6_addr *rep_coa,
++			    __u16 sequence, __u8 flags,
++			    __u8 *k_bu)
++{
++	__u8 status = SUCCESS;
++
++	/* Cached Care-of Address Deregistration */
++	if (mipv6_bcache_exists(haddr, daddr) == CACHE_ENTRY) {
++		mipv6_bcache_delete(haddr, daddr, CACHE_ENTRY);
++	} else {
++		DEBUG(DBG_INFO, "entry is not in cache");
++		status = REASON_UNSPECIFIED;
++	}
++	if (flags & MIPV6_BU_F_ACK) {
++		mipv6_send_ba(daddr, haddr, coa, rep_coa, status, sequence, 
++			      0, k_bu);
++	}
++}
++
++static void bc_cn_home_delete(struct in6_addr *daddr, struct in6_addr *haddr, 
++			      struct in6_addr *coa, struct in6_addr *rep_coa,
++			      __u16 sequence, __u8 flags,
++			      __u8 *k_bu)
++{
++}
++
++/**
++ * parse_mo_tlv - Parse TLV-encoded Mobility Options
++ * @mos: pointer to Mobility Options
++ * @len: total length of options
++ * @opts: structure to store option pointers
++ *
++ * Parses Mobility Options passed in @mos.  Stores pointers in @opts
++ * to all valid mobility options found in @mos.  Unknown options and
++ * padding (%MIPV6_OPT_PAD1 and %MIPV6_OPT_PADN) is ignored and
++ * skipped.
++ **/
++int parse_mo_tlv(void *mos, int len, struct mobopt *opts)
++{
++	struct mipv6_mo *curr = (struct mipv6_mo *)mos;
++	int left = len;
++
++	while (left > 0) {
++		int optlen = 0;
++		if (curr->type == MIPV6_OPT_PAD1)
++			optlen = 1;
++		else
++			optlen = 2 + curr->length;
++
++		if (optlen > left)
++			goto bad;
++
++		switch (curr->type) {
++		case MIPV6_OPT_PAD1:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_PAD1 at %x", curr);
++			break;
++		case MIPV6_OPT_PADN:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_PADN at %x", curr);
++			break;
++		case MIPV6_OPT_ALTERNATE_COA:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_ACOA at %x", curr);
++			opts->alt_coa = (struct mipv6_mo_alt_coa *)curr;
++			break;
++		case MIPV6_OPT_NONCE_INDICES:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_NONCE_INDICES at %x", curr);
++			opts->nonce_indices = 
++				(struct mipv6_mo_nonce_indices *)curr;
++			break;
++		case MIPV6_OPT_AUTH_DATA:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_AUTH_DATA at %x", curr);
++			opts->auth_data = (struct mipv6_mo_bauth_data *)curr;
++			break;
++		case MIPV6_OPT_BIND_REFRESH_ADVICE:
++			DEBUG(DBG_DATADUMP, "MIPV6_OPT_BIND_REFRESH_ADVICE at %x", curr);
++			opts->br_advice = (struct mipv6_mo_br_advice *)curr;
++			break;
++		default:
++			DEBUG(DBG_INFO, "MO Unknown option type %d at %x, ignoring.",
++			       curr->type, curr);
++			/* unknown mobility option, ignore and skip */
++		}
++
++		(u8 *)curr += optlen;
++		left -= optlen;
++	}
++
++	if (left == 0)
++		return 0;
++ bad:
++	return -1;
++}
++
++/*
++ *
++ * Mobility Header Message handlers
++ *
++ */
++
++static int mipv6_handle_mh_testinit(struct sk_buff *skb,
++				    struct in6_addr *cn,
++				    struct in6_addr *lcoa,
++				    struct in6_addr *saddr,
++				    struct in6_addr *fcoa,
++				    struct mipv6_mh *mh)
++{
++	struct mipv6_mh_addr_ti *ti = (struct mipv6_mh_addr_ti *)mh->data;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++	DEBUG_FUNC();
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*ti);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "Mobility Header length less than H/C TestInit");
++		return -1;
++	}
++	if (!mip6node_cnf.accept_ret_rout) {
++		DEBUG(DBG_INFO, "Return routability administratively disabled");
++		return -1;
++	}
++	if (lcoa || fcoa) {
++		DEBUG(DBG_INFO, "H/C TestInit has HAO or RTH2, dropped.");
++		return -1;
++	}
++
++	if (mh->type == MIPV6_MH_HOTI) {
++		MIPV6_INC_STATS(n_hoti_rcvd);
++		return mipv6_send_addr_test(cn, saddr, MIPV6_MH_HOT, ti);
++	} else if (mh->type == MIPV6_MH_COTI) {
++		MIPV6_INC_STATS(n_coti_rcvd);
++		return mipv6_send_addr_test(cn, saddr, MIPV6_MH_COT, ti);
++	} else 
++		return -1; /* Impossible to get here */
++}
++
++/**
++ * mipv6_handle_mh_bu - Binding Update handler
++ * @src: care-of address of sender
++ * @dst: our address
++ * @haddr: home address of sender
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ * Handles Binding Update. Packet and offset to option are passed.
++ * Returns 0 on success, otherwise negative.
++ **/
++static int mipv6_handle_mh_bu(struct sk_buff *skb,
++			      struct in6_addr *dst,
++			      struct in6_addr *unused,
++			      struct in6_addr *haddr, 
++			      struct in6_addr *coaddr,
++			      struct mipv6_mh *mh)
++{
++	struct mipv6_mh_bu *bu = (struct mipv6_mh_bu *)mh->data;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++	int auth = 0;
++	int dereg; /* Is this deregistration? */ 
++	int addr_type;
++
++	struct mipv6_bce bc_entry;
++	struct in6_addr *coa, *reply_coa;
++	__u8 *key_bu = NULL; /* RR BU authentication key */
++	__u8 flags = bu->flags;
++	__u16 sequence;
++	__u32 lifetime;
++	__u16 nonce_ind = (__u16) -1; 
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*bu);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "Mobility Header length less than BU");
++		MIPV6_INC_STATS(n_bu_drop.invalid);
++		return -1;
++	}
++
++	addr_type = ipv6_addr_type(haddr);
++	if (addr_type&IPV6_ADDR_LINKLOCAL || !(addr_type&IPV6_ADDR_UNICAST))
++		return -EINVAL;
++
++	/* If HAO not present, CoA == HAddr */
++	if (coaddr == NULL) 
++		coa = haddr;
++	else {
++		coa = coaddr;
++		addr_type = ipv6_addr_type(coa);
++		if (addr_type&IPV6_ADDR_LINKLOCAL ||
++		    !(addr_type&IPV6_ADDR_UNICAST))
++			return -EINVAL;
++	}
++	reply_coa = coa;
++
++	sequence = ntohs(bu->sequence);
++	if (bu->lifetime == 0xffff)
++		lifetime = 0xffffffff;
++	else
++		lifetime = ntohs(bu->lifetime) << 2;
++
++	dereg = (ipv6_addr_cmp(haddr, coa) == 0 || lifetime == 0);
++
++	if (opt_len > 0) {
++		struct mobopt opts;
++		memset(&opts, 0, sizeof(opts));
++		if (parse_mo_tlv(bu + 1, opt_len, &opts) < 0) {
++			MIPV6_INC_STATS(n_bu_drop.invalid);
++			return -1;
++		}
++		/*
++		 * MIPV6_OPT_AUTH_DATA, MIPV6_OPT_NONCE_INDICES, 
++		 * MIPV6_OPT_ALT_COA
++		 */
++		if (opts.alt_coa) {
++			coa = &opts.alt_coa->addr;
++			dereg = (ipv6_addr_cmp(haddr, coa) == 0 || lifetime == 0);
++		}
++		addr_type = ipv6_addr_type(coa);
++		if (addr_type&IPV6_ADDR_LINKLOCAL || 
++		    !(addr_type&IPV6_ADDR_UNICAST))
++			return -EINVAL;
++
++		if (flags & MIPV6_BU_F_HOME) {
++			if (opts.nonce_indices)
++				return -1;
++		} else {
++			u8 ba_status = 0;
++			u8 *h_ckie  = NULL, *c_ckie = NULL; /* Home and care-of cookies */
++
++			/* BUs to CN MUST include authorization data and nonce indices options */
++			if (!opts.auth_data || !opts.nonce_indices) {
++				DEBUG(DBG_WARNING,
++				      "Route optimization BU without authorization material, aborting processing");
++				return MH_AUTH_FAILED;
++			}
++			if (mipv6_rr_cookie_create(
++				    haddr, &h_ckie, opts.nonce_indices->home_nonce_i) < 0) {
++				DEBUG(DBG_WARNING,
++				      "mipv6_rr_cookie_create failed for home cookie");
++				ba_status = EXPIRED_HOME_NONCE_INDEX;
++			}
++			nonce_ind = opts.nonce_indices->home_nonce_i;
++			/* Don't create the care-of cookie, if MN deregisters */
++			if (!dereg && mipv6_rr_cookie_create(
++				    coa, &c_ckie,
++				    opts.nonce_indices->careof_nonce_i) < 0) {
++				DEBUG(DBG_WARNING,
++				      "mipv6_rr_cookie_create failed for coa cookie");
++				if (ba_status == 0)
++					ba_status = EXPIRED_CAREOF_NONCE_INDEX;
++				else
++					ba_status = EXPIRED_NONCES;
++			}
++			if (ba_status == 0) {
++				if (dereg)
++					key_bu = mipv6_rr_key_calc(h_ckie, NULL);
++				else
++					key_bu = mipv6_rr_key_calc(h_ckie, c_ckie);	       
++				mh->checksum = 0;/* TODO: Don't mangle the packet */
++				if (key_bu && mipv6_auth_check(
++					dst, coa, (__u8 *)mh,  msg_len + sizeof(*mh), opts.auth_data, key_bu) == 0) {
++					DEBUG(DBG_INFO, "mipv6_auth_check OK for BU");
++					auth = 1;
++				} else {
++					DEBUG(DBG_WARNING, 
++					      "BU Authentication failed");
++				}
++			}
++			if (h_ckie)
++				kfree(h_ckie);
++			if (c_ckie)
++				kfree(c_ckie);
++			if (ba_status != 0) {
++				MIPV6_INC_STATS(n_bu_drop.auth);
++				mipv6_send_ba(dst, haddr, coa,
++					      reply_coa, ba_status,
++					      sequence, 0, NULL);
++				goto out;
++			}
++		}
++
++	}
++	/* Require authorization option for RO, home reg is protected by IPsec */
++	if (!(flags & MIPV6_BU_F_HOME) && !auth) {
++		MIPV6_INC_STATS(n_bu_drop.auth);
++		if (key_bu)
++			kfree(key_bu);
++		return MH_AUTH_FAILED;
++	}
++
++	if (mipv6_bcache_get(haddr, dst, &bc_entry) == 0) {
++		if ((bc_entry.flags&MIPV6_BU_F_HOME) != 
++		    (flags&MIPV6_BU_F_HOME)) {
++			DEBUG(DBG_INFO,
++			      "Registration type change. Sending BA REG_TYPE_CHANGE_FORBIDDEN");
++			mipv6_send_ba(dst, haddr, coa, reply_coa,
++				      REG_TYPE_CHANGE_FORBIDDEN,
++				      sequence, lifetime, key_bu);
++			goto out;
++		}
++		if (!MIPV6_SEQ_GT(sequence, bc_entry.seq)) {
++			DEBUG(DBG_INFO,
++			      "Sequence number mismatch. Sending BA SEQUENCE_NUMBER_OUT_OF_WINDOW");
++			mipv6_send_ba(dst, haddr, coa, reply_coa,
++				      SEQUENCE_NUMBER_OUT_OF_WINDOW,
++				      bc_entry.seq, lifetime, key_bu);
++			goto out;
++		}
++	}
++
++	if (!dereg) {
++		int ifindex;
++		struct rt6_info *rt;
++
++		/* Avoid looping binding cache entries */
++		if (mipv6_bcache_get(coa, dst, &bc_entry) == 0) {
++			DEBUG(DBG_WARNING, "Looped BU, dropping the packet");
++			goto out;
++		}
++		DEBUG(DBG_INFO, "calling bu_add.");
++		if ((rt = rt6_lookup(haddr, dst, 0, 0)) != NULL) {
++			ifindex = rt->rt6i_dev->ifindex;
++			dst_release(&rt->u.dst);
++		} else {
++			/*
++			 * Can't process the BU since the right interface is 
++			 * not found.
++			 */
++			DEBUG(DBG_WARNING, "No route entry found for handling "
++			      "a BU request, (using 0 as index)");
++			ifindex = 0;
++		}
++		if (flags & MIPV6_BU_F_HOME)
++			mip6_fn.bce_home_add(ifindex, dst, haddr, coa, 
++					     reply_coa, lifetime, sequence,
++					     flags, key_bu);
++		else
++			mip6_fn.bce_cache_add(ifindex, dst, haddr, coa, 
++					      reply_coa, lifetime, sequence,
++					      flags, key_bu);
++	} else {
++		DEBUG(DBG_INFO, "calling BCE delete.");
++
++		if (flags & MIPV6_BU_F_HOME)
++			mip6_fn.bce_home_del(dst, haddr, coa, reply_coa,
++					     sequence, flags, key_bu);
++		else {
++			mipv6_rr_invalidate_nonce(nonce_ind);
++			mip6_fn.bce_cache_del(dst, haddr, coa, reply_coa, 
++					      sequence, flags, key_bu);
++		}
++	}
++ out:
++	MIPV6_INC_STATS(n_bu_rcvd);
++	if (key_bu)
++		kfree(key_bu);
++	return 0;
++}
++
++static int mipv6_mh_rcv(struct sk_buff *skb)
++{
++	struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
++	struct mipv6_mh *mh;
++	struct in6_addr *lhome, *fhome, *lcoa = NULL, *fcoa = NULL;
++	int ret = 0;
++
++	fhome = &skb->nh.ipv6h->saddr;
++	lhome = &skb->nh.ipv6h->daddr;
++
++	if (opt->hao != 0) {
++		struct mipv6_dstopt_homeaddr *hao;
++		hao = (struct mipv6_dstopt_homeaddr *)(skb->nh.raw + opt->hao);
++		fcoa = &hao->addr;
++	}
++
++	if (opt->srcrt2 != 0) {
++		struct rt2_hdr *rt2;
++		rt2 = (struct rt2_hdr *)((u8 *)skb->nh.raw + opt->srcrt2);
++		lcoa = &rt2->addr;
++	}
++
++	/* Verify checksum is correct */
++	if (skb->ip_summed == CHECKSUM_HW) {
++		skb->ip_summed = CHECKSUM_UNNECESSARY;
++		if (csum_ipv6_magic(fhome, lhome, skb->len, IPPROTO_MOBILITY,
++				    skb->csum)) {
++			if (net_ratelimit())
++				printk(KERN_WARNING "MIPv6 MH hw checksum failed\n");
++			skb->ip_summed = CHECKSUM_NONE;
++		}
++	}
++	if (skb->ip_summed == CHECKSUM_NONE) {
++		if (csum_ipv6_magic(fhome, lhome, skb->len, IPPROTO_MOBILITY,
++				    skb_checksum(skb, 0, skb->len, 0))) {
++			if (net_ratelimit())
++				printk(KERN_WARNING "MIPv6 MH checksum failed\n");
++			goto bad;
++		}
++	}
++
++	if (!pskb_may_pull(skb, skb->h.raw-skb->data+sizeof(*mh)) ||
++	    !pskb_may_pull(skb, 
++			   skb->h.raw-skb->data+((skb->h.raw[1]+1)<<3))) {
++		DEBUG(DBG_INFO, "MIPv6 MH invalid length");
++		kfree_skb(skb);
++		return 0;
++	}
++
++	mh = (struct mipv6_mh *) skb->h.raw;
++
++	/* Verify there are no more headers after the MH */
++	if (mh->payload != NEXTHDR_NONE) {
++		__u32 pos = (__u32)&mh->payload - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "MIPv6 MH error");
++		goto bad;
++	}
++
++	if (mh->type > MIPV6_MH_MAX) {
++		/* send binding error */
++		printk("Invalid mobility header type (%d)\n", mh->type);
++		mipv6_send_be(lhome, fcoa ? fcoa : fhome,
++			      fcoa ? fhome : NULL, 
++			      MIPV6_BE_UNKNOWN_MH_TYPE);
++		goto bad;
++	}
++	if (mh_rcv[mh->type].func != NULL) {
++		ret = mh_rcv[mh->type].func(skb, lhome, lcoa, fhome, fcoa, mh);
++	} else {
++		DEBUG(DBG_INFO, "No handler for MH Type %d", mh->type);
++		goto bad;
++	}
++
++	kfree_skb(skb);
++	return 0;
++
++bad:
++	MIPV6_INC_STATS(n_mh_in_error);
++	kfree_skb(skb);
++	return 0;
++
++}
++
++#if LINUX_VERSION_CODE >= 0x2052a
++struct inet6_protocol mipv6_mh_protocol =
++{
++	mipv6_mh_rcv,		/* handler		*/
++	NULL			/* error control	*/
++};
++#else
++struct inet6_protocol mipv6_mh_protocol = 
++{
++	mipv6_mh_rcv,		/* handler		*/
++	NULL,			/* error control	*/
++	NULL,			/* next			*/
++	IPPROTO_MOBILITY,	/* protocol ID		*/
++	0,			/* copy			*/
++	NULL,			/* data			*/
++	"MIPv6 MH"	       	/* name			*/
++};
++#endif
++
++/*
++ *
++ * Code module init/exit functions
++ *
++ */
++
++int __init mipv6_mh_common_init(void)
++{
++	struct sock *sk;
++	int err;
++
++	mip6_fn.bce_home_add = bc_cn_home_add;
++	mip6_fn.bce_cache_add = bc_cache_add;
++	mip6_fn.bce_home_del = bc_cn_home_delete;
++	mip6_fn.bce_cache_del = bc_cache_delete;
++
++	mipv6_mh_socket = sock_alloc();
++	if (mipv6_mh_socket == NULL) {
++		printk(KERN_ERR
++		       "Failed to create the MIP6 MH control socket.\n");
++		return -1;
++	}
++	mipv6_mh_socket->type = SOCK_RAW;
++
++	if ((err = sock_create(PF_INET6, SOCK_RAW, IPPROTO_MOBILITY, 
++			       &mipv6_mh_socket)) < 0) {
++		printk(KERN_ERR
++		       "Failed to initialize the MIP6 MH control socket (err %d).\n",
++		       err);
++		sock_release(mipv6_mh_socket);
++		mipv6_mh_socket = NULL; /* for safety */
++		return err;
++	}
++
++	sk = mipv6_mh_socket->sk;
++	sk->allocation = GFP_ATOMIC;
++	sk->sndbuf = 64 * 1024 + sizeof(struct sk_buff);
++	sk->prot->unhash(sk);
++
++	memset(&mh_rcv, 0, sizeof(mh_rcv));
++	mh_rcv[MIPV6_MH_HOTI].func = mipv6_handle_mh_testinit;
++	mh_rcv[MIPV6_MH_COTI].func = mipv6_handle_mh_testinit;
++	mh_rcv[MIPV6_MH_BU].func =  mipv6_handle_mh_bu;
++
++#if LINUX_VERSION_CODE >= 0x2052a
++	if (inet6_add_protocol(&mipv6_mh_protocol, IPPROTO_MOBILITY) < 0) {
++		printk(KERN_ERR "Failed to register MOBILITY protocol\n");
++		sock_release(mipv6_mh_socket);
++		mipv6_mh_socket = NULL;
++		return -EAGAIN;
++	}
++#else
++	inet6_add_protocol(&mipv6_mh_protocol);
++#endif
++	/* To disable the use of dst_cache, 
++	 *  which slows down the sending of BUs ??
++	 */
++	sk->dst_cache=NULL; 
++
++	return 0;
++}
++
++void __exit mipv6_mh_common_exit(void)
++{
++	if (mipv6_mh_socket) sock_release(mipv6_mh_socket);
++	mipv6_mh_socket = NULL; /* For safety. */
++
++#if LINUX_VERSION_CODE >= 0x2052a
++	inet6_del_protocol(&mipv6_mh_protocol, IPPROTO_MOBILITY);
++#else
++	inet6_del_protocol(&mipv6_mh_protocol);
++#endif
++	memset(&mh_rcv, 0, sizeof(mh_rcv));
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/mobhdr_mn.c
+@@ -0,0 +1,1155 @@
++/*
++ *	Mobile IPv6 Mobility Header Functions for Mobile Node
++ *
++ *	Authors:
++ *	Antti Tuominen	<ajtuomin@tml.hut.fi>
++ *	Niklas K�mpe	<nhkampe@cc.hut.fi>
++ *	Henrik Petander	<henrik.petander@hut.fi>
++ *
++ *	$Id:$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License as
++ *	published by the Free Software Foundation; either version 2 of
++ *	the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/types.h>
++#include <linux/sched.h>
++#include <linux/init.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "mobhdr.h"
++#include "mn.h"
++#include "bul.h"
++#include "rr_crypto.h"
++#include "debug.h"
++#include "util.h"
++#include "stats.h"
++
++int rr_configured = 1;
++
++/* Return value of mipv6_rr_state() */
++#define NO_RR			0
++#define DO_RR			1
++#define RR_FOR_COA		2
++#define INPROGRESS_RR		3
++
++/** 
++ * send_bu_msg - sends a Binding Update 
++ * @bulentry : BUL entry with the information for building a BU
++ *
++ * Function builds a BU msg based on the contents of a bul entry.
++ * Does not change the bul entry.
++ **/
++static int send_bu_msg(struct mipv6_bul_entry *binding)
++{ 
++	int auth = 0; /* Use auth */
++	int ret = 0;
++	struct mipv6_auth_parm parm;
++	struct mipv6_mh_bu bu;
++
++	if (!binding) {
++		DEBUG(DBG_ERROR, "called with a null bul entry");
++		return -1;
++	}
++	
++	memset(&parm, 0, sizeof(parm));
++	if (mipv6_prefix_compare(&binding->coa, &binding->home_addr, 64))
++		parm.coa = &binding->home_addr;
++	else
++		parm.coa = &binding->coa;
++	parm.cn_addr = &binding->cn_addr;
++
++	if (binding->rr && binding->rr->kbu) {
++		DEBUG(DBG_INFO, "Binding with key");
++		auth = 1;
++		parm.k_bu = binding->rr->kbu;
++	}
++	memset(&bu, 0, sizeof(bu));
++	bu.flags = binding->flags;
++	bu.sequence = htons(binding->seq);
++	bu.lifetime = htons(binding->lifetime >> 2);
++	bu.reserved = 0;
++
++	ret = send_mh(&binding->cn_addr, &binding->home_addr,
++		      MIPV6_MH_BU, sizeof(bu), (u8 *)&bu, 
++		      &binding->home_addr, NULL, 
++		      binding->ops, &parm);
++
++	if (ret == 0)
++		MIPV6_INC_STATS(n_bu_sent);
++
++	return ret;
++}
++
++/**
++ * mipv6_send_addr_test_init - send a HoTI or CoTI message
++ * @saddr: source address for H/CoTI
++ * @daddr: destination address for H/CoTI
++ * @msg_type: Identifies whether HoTI or CoTI
++ * @init_cookie: the HoTi or CoTi init cookie
++ *
++ * The message will be retransmitted till we get a HoT or CoT message, since 
++ * our caller (mipv6_RR_start) has entered this message in the BUL with
++ * exponential backoff retramission set.
++ */
++static int mipv6_send_addr_test_init(struct in6_addr *saddr,
++				     struct in6_addr *daddr,
++				     u8 msg_type,
++				     u8 *init_cookie)
++{
++	struct mipv6_mh_addr_ti ti;
++	struct mipv6_mh_opt *ops = NULL;
++	int ret = 0;
++
++	/* Set reserved and copy the cookie from address test init msg */
++	ti.reserved = 0;
++	mipv6_rr_mn_cookie_create(init_cookie);
++	memcpy(ti.init_cookie, init_cookie, MIPV6_RR_COOKIE_LENGTH);
++
++	ret = send_mh(daddr, saddr, msg_type, sizeof(ti), (u8 *)&ti,
++		      NULL, NULL, ops, NULL);
++	if (ret == 0) {
++		if (msg_type == MIPV6_MH_HOTI) {
++			MIPV6_INC_STATS(n_hoti_sent);
++		} else {
++			MIPV6_INC_STATS(n_coti_sent);
++		}
++	}
++
++	return ret;
++}
++
++/*
++ *
++ * Callback handlers for binding update list
++ *
++ */
++
++/* Return value 0 means keep entry, non-zero means discard entry. */
++
++/* Callback for BUs not requiring acknowledgement
++ */
++int bul_entry_expired(struct mipv6_bul_entry *bulentry)
++{
++	/* Lifetime expired, delete entry. */
++	DEBUG(DBG_INFO, "bul entry 0x%p lifetime expired, deleting entry", 
++	      bulentry);
++	return 1;
++}
++
++/* Callback for BUs requiring acknowledgement with exponential resending
++ * scheme */
++static int bul_resend_exp(struct mipv6_bul_entry *bulentry)
++{
++	unsigned long now = jiffies;
++	
++	DEBUG(DBG_INFO, "(0x%x) resending bu", (int) bulentry);
++
++	
++	/* If sending a de-registration, do not care about the
++	 * lifetime value, as de-registrations are normally sent with
++	 * a zero lifetime value. If the entry is a home entry get the 
++	 * current lifetime. 
++	 */
++
++	if (bulentry->lifetime != 0) {
++		bulentry->lifetime = mipv6_mn_get_bulifetime(
++			&bulentry->home_addr, &bulentry->coa, bulentry->flags);
++
++		bulentry->expire = now + bulentry->lifetime * HZ;
++	} else {
++		bulentry->expire = now + HOME_RESEND_EXPIRE * HZ; 
++	}
++	if (bulentry->rr) {
++		/* Redo RR, if cookies have expired */
++		if (time_after(jiffies, bulentry->rr->home_time + MAX_TOKEN_LIFE * HZ)) 
++			bulentry->rr->rr_state |= RR_WAITH;
++		if (time_after(jiffies, bulentry->rr->careof_time + MAX_NONCE_LIFE * HZ)) 
++			bulentry->rr->rr_state |= RR_WAITC;
++
++		if (bulentry->rr->rr_state & RR_WAITH) {
++			/* Resend HoTI directly */
++			mipv6_send_addr_test_init(&bulentry->home_addr, 
++						  &bulentry->cn_addr, MIPV6_MH_HOTI,
++						  bulentry->rr->hot_cookie);
++		}
++		if (bulentry->rr->rr_state & RR_WAITC) {
++				/* Resend CoTI directly */
++				mipv6_send_addr_test_init(&bulentry->coa, 
++							  &bulentry->cn_addr, MIPV6_MH_COTI,
++							  bulentry->rr->cot_cookie);
++			}
++		goto out;
++	}
++	
++	bulentry->seq++;
++
++	if (send_bu_msg(bulentry) < 0)
++		DEBUG(DBG_ERROR, "Resending of BU failed");
++
++out:
++	/* Schedule next retransmission */
++	if (bulentry->delay < bulentry->maxdelay) {
++		bulentry->delay = 2 * bulentry->delay;
++		if (bulentry->delay > bulentry->maxdelay) {
++			/* can happen if maxdelay is not power(mindelay, 2) */
++			bulentry->delay = bulentry->maxdelay;
++		}
++	} else if (bulentry->flags & MIPV6_BU_F_HOME) {
++		/* Home registration - continue sending BU at maxdelay rate */
++		DEBUG(DBG_INFO, "Sending BU to HA after max ack wait time "
++		      "reached(0x%x)", (int) bulentry);
++		bulentry->delay = bulentry->maxdelay;
++	} else if (!(bulentry->flags & MIPV6_BU_F_HOME)) {
++		/* Failed to get BA from a CN */
++		bulentry->callback_time = now;
++		return -1;
++	}
++	
++	bulentry->callback_time = now + bulentry->delay * HZ;
++	return 0;
++}
++
++
++
++/* Callback for sending a registration refresh BU
++ */
++static int bul_refresh(struct mipv6_bul_entry *bulentry)
++{
++	unsigned long now = jiffies;
++	
++	/* Refresh interval passed, send new BU */
++	DEBUG(DBG_INFO, "bul entry 0x%x refresh interval passed, sending new BU", (int) bulentry);
++	if (bulentry->lifetime == 0)
++		return 0;
++
++	/* Set new maximum lifetime and expiration time */
++	bulentry->lifetime = mipv6_mn_get_bulifetime(&bulentry->home_addr, 
++						     &bulentry->coa, 
++						     bulentry->flags);
++	bulentry->expire = now + bulentry->lifetime * HZ;
++	bulentry->seq++;
++	/* Send update */
++	if (send_bu_msg(bulentry) < 0)
++		DEBUG(DBG_ERROR, "Resending of BU failed");
++	
++	if (time_after_eq(now, bulentry->expire)) {
++		/* Sanity check */
++		DEBUG(DBG_ERROR, "bul entry expire time in history - setting expire to %u secs", ERROR_DEF_LIFETIME);
++		bulentry->lifetime = ERROR_DEF_LIFETIME;
++		bulentry->expire = now + ERROR_DEF_LIFETIME*HZ;
++	}
++
++	/* Set up retransmission */
++	bulentry->state = RESEND_EXP;
++	bulentry->callback = bul_resend_exp;
++	bulentry->callback_time = now + INITIAL_BINDACK_TIMEOUT*HZ;
++	bulentry->delay = INITIAL_BINDACK_TIMEOUT;
++	bulentry->maxdelay = MAX_BINDACK_TIMEOUT;
++
++	return 0;
++}
++
++static int mipv6_send_RR_bu(struct mipv6_bul_entry *bulentry)
++{
++	int ret;
++	int ops_len = 0;
++	u16 nonces[2];
++
++	DEBUG(DBG_INFO, "Sending BU to CN  %x:%x:%x:%x:%x:%x:%x:%x "
++	      "for home address %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(&bulentry->cn_addr), NIPV6ADDR(&bulentry->home_addr));
++	nonces[0] = bulentry->rr->home_nonce_index;
++	nonces[1] = bulentry->rr->careof_nonce_index;
++	ops_len = sizeof(struct mipv6_mo_bauth_data) + MIPV6_RR_MAC_LENGTH + 
++			sizeof(struct mipv6_mo_nonce_indices);
++	if (bulentry->ops) {
++		DEBUG(DBG_WARNING, "Bul entry had existing mobility options, freeing them");
++		kfree(bulentry->ops);
++	}
++	bulentry->ops = alloc_mh_opts(ops_len);
++
++	if (!bulentry->ops)
++		return -ENOMEM;
++	if (append_mh_opt(bulentry->ops, MIPV6_OPT_NONCE_INDICES, 
++			  sizeof(struct mipv6_mo_nonce_indices) - 2, nonces) < 0)
++		return -ENOMEM;
++
++	if (append_mh_opt(bulentry->ops, MIPV6_OPT_AUTH_DATA,
++			  MIPV6_RR_MAC_LENGTH, NULL) < 0)
++		return -ENOMEM;
++	/* RR procedure is over, send a BU */
++	if (!(bulentry->flags & MIPV6_BU_F_ACK)) {
++		DEBUG(DBG_INFO, "Setting bul callback to bul_entry_expired");
++		bulentry->state = ACK_OK;
++		bulentry->callback = bul_entry_expired;
++		bulentry->callback_time = jiffies + HZ * bulentry->lifetime;
++		bulentry->expire = jiffies + HZ *  bulentry->lifetime;
++	}
++	else {
++		bulentry->callback_time = jiffies + HZ;
++		bulentry->expire = jiffies + HZ *  bulentry->lifetime;
++	}
++
++	ret  = send_bu_msg(bulentry);
++	mipv6_bul_reschedule(bulentry);
++	return ret;
++}
++
++static int mipv6_rr_state(struct mipv6_bul_entry *bul, struct in6_addr *saddr,
++			  struct in6_addr *coa, __u8 flags)
++{
++	if (!rr_configured)
++		return NO_RR;
++       	if (flags & MIPV6_BU_F_HOME) {
++		/* We don't need RR, this is a Home Registration */
++		return NO_RR;
++	}
++	if (!bul || !bul->rr) {
++		/* First time BU to CN, need RR */
++		return DO_RR;
++	}
++
++	switch (bul->rr->rr_state) {
++	case RR_INIT:
++		/* Need RR if first BU to CN */
++		return DO_RR;
++	case RR_DONE:
++		/* If MN moves to a new coa, do RR for it */
++		if (!ipv6_addr_cmp(&bul->coa, coa))  
++			return NO_RR; 
++		else
++			return DO_RR;
++	default:
++		/*
++		 * We are in the middle of RR, the HoTI and CoTI have been
++		 * sent. But we haven't got HoT and CoT from the CN, so
++		 * don't do anything more at this time.
++		 */
++		return INPROGRESS_RR;
++	}
++}
++
++/**
++ * mipv6_RR_start - Start Return Routability procedure
++ * @home_addr: home address
++ * @cn_addr: correspondent address
++ * @coa: care-of address
++ * @entry: binding update list entry (if any)
++ * @initdelay: initial ack timeout
++ * @maxackdelay: maximum ack timeout
++ * @flags: flags
++ * @lifetime: lifetime of binding
++ * @ops: mobility options
++ *
++ * Caller must hold @bul_lock (write).
++ **/
++static int mipv6_RR_start(struct in6_addr *home_addr, struct in6_addr *cn_addr,
++			  struct in6_addr *coa, struct mipv6_bul_entry *entry,
++			  __u32 initdelay, __u32 maxackdelay, __u8 flags, 
++			  __u32 lifetime, struct mipv6_mh_opt *ops)
++{
++	int ret = -1;
++	struct mipv6_bul_entry *bulentry = entry;
++	struct mipv6_rr_info *rr = NULL;
++	int seq = 0;
++	DEBUG_FUNC();
++	
++	/* Do RR procedure only for care-of address after handoff, 
++	   if home cookie is still valid */
++	if (bulentry && bulentry->rr) {
++		if (time_before(jiffies, bulentry->rr->home_time + MAX_NONCE_LIFE * HZ) &&
++		    lifetime && !(ipv6_addr_cmp(home_addr, coa) == 0)) { 
++			mipv6_rr_mn_cookie_create(bulentry->rr->cot_cookie); 
++			DEBUG(DBG_INFO, "Bul entry and rr info exist, only doing RR for CoA");
++			ipv6_addr_copy(&bulentry->coa, coa);
++			bulentry->rr->rr_state |= RR_WAITC;
++		} else if (!lifetime) { /* Send only HoTi when returning home */
++			mipv6_rr_mn_cookie_create(bulentry->rr->hot_cookie); 
++			DEBUG(DBG_INFO, "Bul entry and rr info exist, only doing RR for HoA");
++			ipv6_addr_copy(&bulentry->coa, coa); /* Home address as CoA */
++			bulentry->rr->rr_state |= RR_WAITH;
++		}
++	} else {
++		DEBUG(DBG_INFO, "Doing RR for both HoA and CoA");
++		rr = kmalloc(sizeof(*rr), GFP_ATOMIC);
++		memset(rr, 0, sizeof(*rr));
++		rr->rr_state = RR_WAITHC;
++	} 
++	if (bulentry) {
++		if (bulentry->state == ACK_ERROR)
++			goto out;
++		seq = bulentry->seq + 1;
++	} else
++		seq = 0;
++	/* Save the info in the BUL to retransmit the BU after RR is done */
++	/* Caller must hold bul_lock (write) since we don't */
++       
++	if ((bulentry = mipv6_bul_add(cn_addr, home_addr, coa, 
++				      min_t(__u32, lifetime, MAX_RR_BINDING_LIFE),
++				      seq, flags, bul_resend_exp, initdelay, 
++				      RESEND_EXP, initdelay, 
++				      maxackdelay, ops, 
++				      rr)) == NULL) {
++		DEBUG(DBG_INFO, "couldn't update BUL for HoTi");
++		goto out;
++	}
++
++	rr = bulentry->rr; 
++	if (rr->rr_state&RR_WAITH)
++		mipv6_send_addr_test_init(home_addr, cn_addr, MIPV6_MH_HOTI, 
++					  rr->hot_cookie);
++	if (ipv6_addr_cmp(home_addr, coa) && lifetime) 
++		mipv6_send_addr_test_init(coa, cn_addr, MIPV6_MH_COTI, rr->cot_cookie);
++	else {
++		bulentry->rr->rr_state &= ~RR_WAITC;
++	}
++	ret = 0;
++out:
++	return ret;
++}
++
++/*
++ * Status codes for mipv6_ba_rcvd()
++ */
++#define STATUS_UPDATE 0
++#define STATUS_REMOVE 1
++
++/**
++ * mipv6_ba_rcvd - Update BUL for this Binding Acknowledgement
++ * @ifindex: interface BA came from
++ * @cnaddr: sender IPv6 address
++ * @home_addr: home address
++ * @sequence: sequence number
++ * @lifetime: lifetime granted by Home Agent in seconds
++ * @refresh: recommended resend interval
++ * @status: %STATUS_UPDATE (ack) or %STATUS_REMOVE (nack)
++ *
++ * This function must be called to notify the module of the receipt of
++ * a binding acknowledgement so that it can cease retransmitting the
++ * option. The caller must have validated the acknowledgement before calling
++ * this function. 'status' can be either STATUS_UPDATE in which case the
++ * binding acknowledgement is assumed to be valid and the corresponding
++ * binding update list entry is updated, or STATUS_REMOVE in which case
++ * the corresponding binding update list entry is removed (this can be
++ * used upon receiving a negative acknowledgement).
++ * Returns 0 if a matching binding update has been sent or non-zero if
++ * not.
++ */
++static int mipv6_ba_rcvd(int ifindex, struct in6_addr *cnaddr, 
++			 struct in6_addr *home_addr, 
++			 u16 sequence, u32 lifetime, 
++			 u32 refresh, int status)
++{
++	struct mipv6_bul_entry *bulentry;
++	unsigned long now = jiffies;
++	struct in6_addr coa;
++
++	DEBUG(DBG_INFO, "BA received with sequence number 0x%x, status: %d",
++	      (int) sequence, status);
++
++	/* Find corresponding entry in binding update list. */
++	write_lock(&bul_lock);
++	if ((bulentry = mipv6_bul_get(cnaddr, home_addr)) == NULL) {
++		DEBUG(DBG_INFO, "- discarded, no entry in bul matches BA source address");
++		write_unlock(&bul_lock);
++		return -1;
++	}
++	
++	ipv6_addr_copy(&coa, &bulentry->coa); 
++	if (status == SEQUENCE_NUMBER_OUT_OF_WINDOW) {
++		__u32 lifetime = mipv6_mn_get_bulifetime(&bulentry->home_addr, 
++							 &bulentry->coa, 
++							 bulentry->flags);
++		bulentry->seq = sequence;
++
++		mipv6_send_bu(&bulentry->home_addr, &bulentry->cn_addr, 
++			      &bulentry->coa, INITIAL_BINDACK_TIMEOUT,
++			      MAX_BINDACK_TIMEOUT, 1, bulentry->flags,
++			      lifetime, NULL);
++		write_unlock(&bul_lock);
++		return 0;
++	} else if (status >= REASON_UNSPECIFIED) {
++		int err;
++		int at_home = MN_NOT_AT_HOME;
++		DEBUG(DBG_WARNING, "- NACK - BA status:  %d, deleting bul entry", status);
++		if (bulentry->flags & MIPV6_BU_F_HOME) {
++			struct mn_info *minfo;
++			read_lock(&mn_info_lock);
++			minfo = mipv6_mninfo_get_by_home(home_addr);
++			if (minfo) {
++				spin_lock(&minfo->lock);
++				if (minfo->is_at_home != MN_NOT_AT_HOME)
++					minfo->is_at_home = MN_AT_HOME;
++				at_home = minfo->is_at_home;
++				minfo->has_home_reg = 0;
++				spin_unlock(&minfo->lock);
++			}
++			read_unlock(&mn_info_lock);
++			DEBUG(DBG_ERROR, "Home registration failed: BA status:  %d, deleting bul entry", status);
++		}
++		write_unlock(&bul_lock);
++		err = mipv6_bul_delete(cnaddr, home_addr);
++		if (at_home == MN_AT_HOME) {
++			mipv6_mn_send_home_na(home_addr);
++			write_lock_bh(&bul_lock);
++			mipv6_bul_iterate(mn_cn_handoff, &coa);
++			write_unlock_bh(&bul_lock);
++		}
++		return err;
++	}
++	bulentry->state = ACK_OK;
++
++	if (bulentry->flags & MIPV6_BU_F_HOME && lifetime > 0) {
++		/* For home registrations: schedule a refresh binding update.
++		 * Use the refresh interval given by home agent or 80%
++		 * of lifetime, whichever is less.
++		 *
++		 * Adjust binding lifetime if 'granted' lifetime
++		 * (lifetime value in received binding acknowledgement)
++		 * is shorter than 'requested' lifetime (lifetime
++		 * value sent in corresponding binding update).
++		 * max((L_remain - (L_update - L_ack)), 0)
++		 */
++		if (lifetime * HZ < (bulentry->expire - bulentry->lastsend)) {
++			bulentry->expire = 
++				max_t(__u32, bulentry->expire - 
++				      ((bulentry->expire - bulentry->lastsend) - 
++				       lifetime * HZ), jiffies + 
++				      ERROR_DEF_LIFETIME * HZ);
++		}
++		if (refresh > lifetime || refresh == 0)
++			refresh = 4 * lifetime / 5;
++			DEBUG(DBG_INFO, "setting callback for expiration of"
++			      " a Home Registration: lifetime:%d, refresh:%d",
++			      lifetime, refresh);
++		bulentry->callback = bul_refresh;
++		bulentry->callback_time = now + refresh * HZ;
++		bulentry->expire = now + lifetime * HZ;
++		bulentry->lifetime = lifetime;
++		if (time_after_eq(jiffies, bulentry->expire)) {
++			/* Sanity check */
++			DEBUG(DBG_ERROR, "bul entry expire time in history - setting expire to %u secs",
++			      ERROR_DEF_LIFETIME);
++			bulentry->expire = jiffies + ERROR_DEF_LIFETIME * HZ;
++		}
++		mipv6_mn_set_home_reg(home_addr, 1);
++		mipv6_bul_iterate(mn_cn_handoff, &coa);
++	} else if ((bulentry->flags & MIPV6_BU_F_HOME) && bulentry->lifetime == 0) {
++		write_unlock(&bul_lock);
++		DEBUG(DBG_INFO, "Got BA for deregistration BU");
++		mipv6_mn_set_home_reg(home_addr, 0);
++		mipv6_bul_delete(cnaddr, home_addr);
++		mipv6_mn_send_home_na(home_addr);
++
++		write_lock_bh(&bul_lock);
++		mipv6_bul_iterate(mn_cn_handoff, &coa);
++		write_unlock_bh(&bul_lock);
++ 		return 0;
++	}
++
++	mipv6_bul_reschedule(bulentry);
++	write_unlock(&bul_lock);
++
++	return 0;
++}
++
++static int mipv6_handle_mh_HC_test(struct sk_buff *skb,
++				   struct in6_addr *saddr,
++				   struct in6_addr *fcoa,
++				   struct in6_addr *cn,
++				   struct in6_addr *lcoa,
++				   struct mipv6_mh *mh)
++{
++	int ret = 0;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++
++	struct mipv6_mh_addr_test *tm = (struct mipv6_mh_addr_test *)mh->data;
++	struct mipv6_bul_entry *bulentry;
++
++	DEBUG_FUNC();
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*tm);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_INFO, "Mobility Header length less than H/C Test");
++		return -1;
++	}
++	if (fcoa || lcoa) {
++		DEBUG(DBG_INFO, "H/C Test has HAO or RTH2, dropped.");
++		return -1;
++	}
++	write_lock(&bul_lock);
++
++	/* We need to get the home address, since CoT only has the CoA*/
++	if (mh->type == MIPV6_MH_COT) {
++		if ((bulentry = mipv6_bul_get_by_ccookie(cn, tm->init_cookie)) == NULL) {
++			DEBUG(DBG_ERROR, "has no BUL or RR state for "
++			      "source:%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(cn));
++			write_unlock(&bul_lock);
++			return -1;
++		}
++	} else { /* HoT has the home address */
++		if (((bulentry = mipv6_bul_get(cn, saddr)) == NULL) || !bulentry->rr) {
++			DEBUG(DBG_ERROR, "has no BUL or RR state for "
++			      "source:%x:%x:%x:%x:%x:%x:%x:%x "
++			      "dest:%x:%x:%x:%x:%x:%x:%x:%x",
++			      NIPV6ADDR(cn), NIPV6ADDR(saddr));
++			write_unlock(&bul_lock);
++			return -1;
++		}
++	}
++
++	switch (mh->type) {
++	case MIPV6_MH_HOT:
++		if ((bulentry->rr->rr_state & RR_WAITH) == 0) {
++			DEBUG(DBG_ERROR, "Not waiting for a Home Test message");
++			goto out;
++		}
++		/*
++		 * Make sure no home cookies have been received yet.
++		 * TODO: Check not being put in at this time since subsequent
++		 * BU's after this time will have home cookie stored.
++		 */
++	
++		/* Check if the cookie received is the right one */
++		if (!mipv6_equal_cookies(tm->init_cookie,
++					 bulentry->rr->hot_cookie)) {
++			/* Invalid cookie, might be an old cookie */
++			DEBUG(DBG_WARNING, "Received HoT cookie does not match stored cookie");
++			goto out;
++		}
++		DEBUG(DBG_INFO, "Got Care-of Test message");
++		bulentry->rr->rr_state &= ~RR_WAITH;
++		memcpy(bulentry->rr->home_cookie, tm->kgen_token, MIPV6_COOKIE_LEN);
++		bulentry->rr->home_nonce_index = tm->nonce_index;
++		bulentry->rr->home_time = jiffies;
++		ret = 1;
++		break;
++
++	case MIPV6_MH_COT:
++		if ((bulentry->rr->rr_state & RR_WAITC) == 0) {
++			DEBUG(DBG_ERROR, "Not waiting for a Home Test message");
++			goto out;
++		}
++		/*
++		 * Make sure no home cookies have been received yet.
++		 * TODO: Check not being put in at this time since subsequent
++		 * BU's at this time will have careof cookie stored.
++		 */
++	
++		/* Check if the cookie received is the right one */
++		if (!mipv6_equal_cookies(tm->init_cookie,
++					 bulentry->rr->cot_cookie)) {
++			DEBUG(DBG_INFO, "Received CoT cookie does not match stored cookie");
++			goto out;
++		}
++		bulentry->rr->rr_state &= ~RR_WAITC;
++		memcpy(bulentry->rr->careof_cookie, tm->kgen_token, MIPV6_COOKIE_LEN);
++		bulentry->rr->careof_nonce_index = tm->nonce_index;
++		bulentry->rr->careof_time = jiffies;
++		ret = 1;
++		break;
++	default:
++		/* Impossible to get here */
++		break;
++	}
++out:
++	if (bulentry->rr->rr_state == RR_DONE) {
++		if (bulentry->rr->kbu) /* First free any old keys */
++			kfree(bulentry->rr->kbu);
++		/* Store the session key to be used in BU's */
++		if (ipv6_addr_cmp(&bulentry->coa, &bulentry->home_addr) && bulentry->lifetime)
++			bulentry->rr->kbu = mipv6_rr_key_calc(bulentry->rr->home_cookie,
++							      bulentry->rr->careof_cookie);
++		else 
++			bulentry->rr->kbu = mipv6_rr_key_calc(bulentry->rr->home_cookie,
++							      NULL);
++		/* RR procedure is over, send a BU */
++		mipv6_send_RR_bu(bulentry);
++	}
++	write_unlock(&bul_lock);
++	return ret;
++}
++
++/**
++ * mipv6_handle_mh_brr - Binding Refresh Request handler
++ * @home: home address
++ * @coa: care-of address
++ * @cn: source of this packet
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ * Handles Binding Refresh Request.  Packet and offset to option are
++ * passed.  Returns 0 on success, otherwise negative.
++ **/
++static int mipv6_handle_mh_brr(struct sk_buff *skb,
++			       struct in6_addr *home,
++			       struct in6_addr *unused1,
++			       struct in6_addr *cn,
++			       struct in6_addr *unused2,
++			       struct mipv6_mh *mh)
++{
++	struct mipv6_mh_brr *brr = (struct mipv6_mh_brr *)mh->data;
++	struct mipv6_bul_entry *binding;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*brr);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_WARNING, "Mobility Header length less than BRR");
++		MIPV6_INC_STATS(n_brr_drop.invalid);
++		return -1;
++	}
++
++	/* check we know src, else drop */
++	write_lock(&bul_lock);
++	if ((binding = mipv6_bul_get(cn, home)) == NULL) {
++		MIPV6_INC_STATS(n_brr_drop.misc);
++		write_unlock(&bul_lock);
++		return MH_UNKNOWN_CN;
++	}
++
++	MIPV6_INC_STATS(n_brr_rcvd);
++
++	if (opt_len > 0) {
++		struct mobopt opts;
++		memset(&opts, 0, sizeof(opts));
++		if (parse_mo_tlv(brr + 1, opt_len, &opts) < 0) {
++			write_unlock(&bul_lock);
++			return -1;
++		}
++		/*
++		 * MIPV6_OPT_AUTH_DATA
++		 */
++	}
++
++	/* must hold bul_lock (write) */
++	mipv6_RR_start(home, cn, &binding->coa, binding, binding->delay, 
++		       binding->maxdelay, binding->flags,
++		       binding->lifetime, binding->ops);
++
++	write_unlock(&bul_lock);
++	/* MAY also decide to delete binding and send zero lifetime BU
++           with alt-coa set to home address */
++
++	return 0;
++}
++
++/**
++ * mipv6_handle_mh_ba - Binding Acknowledgement handler
++ * @src: source of this packet
++ * @coa: care-of address
++ * @home: home address
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ **/
++static int mipv6_handle_mh_ba(struct sk_buff *skb,
++			      struct in6_addr *home,
++			      struct in6_addr *coa,
++			      struct in6_addr *src,
++			      struct in6_addr *unused,
++			      struct mipv6_mh *mh)
++{
++	struct mipv6_mh_ba *ba = (struct mipv6_mh_ba *)mh->data;
++	struct mipv6_bul_entry *binding = NULL;
++	struct mobopt opts;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++
++	int auth = 1, req_auth = 1, refresh = -1, ifindex = 0;
++	u32 lifetime, sequence;
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*ba);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_WARNING, "Mobility Header length less than BA");
++		MIPV6_INC_STATS(n_ba_drop.invalid);
++		return -1;
++	}
++
++	lifetime = ntohs(ba->lifetime) << 2;
++	sequence = ntohs(ba->sequence);
++
++	if (opt_len > 0) {
++		memset(&opts, 0, sizeof(opts));
++		if (parse_mo_tlv(ba + 1, opt_len, &opts) < 0)
++			return -1;
++		/*
++		 * MIPV6_OPT_AUTH_DATA, MIPV6_OPT_BR_ADVICE
++		 */
++		if (opts.br_advice)
++			refresh = ntohs(opts.br_advice->refresh_interval);
++	}
++
++	if (ba->status >= EXPIRED_HOME_NONCE_INDEX && 
++	    ba->status <= EXPIRED_NONCES) 
++		req_auth = 0;
++	
++	write_lock(&bul_lock);
++	binding = mipv6_bul_get(src, home);
++	if (!binding) {
++		DEBUG(DBG_INFO, "No binding, BA dropped.");
++		write_unlock(&bul_lock);
++		return -1;
++	}
++
++	if (opts.auth_data && binding->rr && 
++	    (mipv6_auth_check(src, coa, (__u8 *)mh, msg_len, 
++			      opts.auth_data, binding->rr->kbu) == 0))
++		auth = 1;
++
++	if (req_auth && binding->rr && !auth) {
++		DEBUG(DBG_INFO, "BA Authentication failed.");
++		MIPV6_INC_STATS(n_ba_drop.auth);
++		write_unlock(&bul_lock);
++		return MH_AUTH_FAILED;
++	}
++
++	if (ba->status == SEQUENCE_NUMBER_OUT_OF_WINDOW) {
++		DEBUG(DBG_INFO,
++		      "Sequence number out of window, setting seq to %d",
++		      sequence);
++	} else if (binding->seq != sequence) {
++		DEBUG(DBG_INFO, "BU/BA Sequence Number mismatch %d != %d",
++		      binding->seq, sequence);
++		MIPV6_INC_STATS(n_ba_drop.invalid);
++		write_unlock(&bul_lock);
++		return MH_SEQUENCE_MISMATCH;
++	}
++	if (ba->status == EXPIRED_HOME_NONCE_INDEX || ba->status == EXPIRED_NONCES) {
++		if (binding->rr) {
++			/* Need to resend home test init to CN */
++			binding->rr->rr_state |= RR_WAITH;
++			mipv6_send_addr_test_init(&binding->home_addr, 
++						  &binding->cn_addr, 
++						  MIPV6_MH_HOTI,
++						  binding->rr->hot_cookie);
++			MIPV6_INC_STATS(n_ban_rcvd);
++		} else {
++			DEBUG(DBG_WARNING, "Got BA with status EXPIRED_HOME_NONCE_INDEX"
++			      "for non-RR BU");
++			MIPV6_INC_STATS(n_ba_drop.invalid);
++		}
++		write_unlock(&bul_lock);
++		return 0;
++	} 
++	if (ba->status == EXPIRED_CAREOF_NONCE_INDEX || ba->status == EXPIRED_NONCES) {
++		if (binding->rr) { 
++			/* Need to resend care-of test init to CN */
++			binding->rr->rr_state |= RR_WAITC;
++			mipv6_send_addr_test_init(&binding->coa, 
++						  &binding->cn_addr, 
++						  MIPV6_MH_COTI,
++						  binding->rr->cot_cookie);
++			MIPV6_INC_STATS(n_ban_rcvd);
++		} else  {
++			DEBUG(DBG_WARNING, "Got BA with status EXPIRED_HOME_CAREOF_INDEX"
++			      "for non-RR BU");
++			MIPV6_INC_STATS(n_ba_drop.invalid);
++		}
++		write_unlock(&bul_lock);
++		return 0;
++	}
++	write_unlock(&bul_lock);
++	
++	if (ba->status >= REASON_UNSPECIFIED) {
++		DEBUG(DBG_INFO, "Binding Ack status : %d indicates error", ba->status);
++		mipv6_ba_rcvd(ifindex, src, home, sequence, lifetime,
++			      refresh, ba->status);
++		MIPV6_INC_STATS(n_ban_rcvd);
++		return 0;
++	}
++	MIPV6_INC_STATS(n_ba_rcvd);
++	if (mipv6_ba_rcvd(ifindex, src, home, ntohs(ba->sequence), lifetime,
++			  refresh, ba->status)) {
++		DEBUG(DBG_WARNING, "mipv6_ba_rcvd failed");
++	}
++	
++	return 0;
++}
++
++/**
++ * mipv6_handle_mh_be - Binding Error handler
++ * @cn: source of this packet
++ * @coa: care-of address
++ * @home: home address
++ * @mh: pointer to the beginning of the Mobility Header
++ *
++ **/
++
++static int mipv6_handle_mh_be(struct sk_buff *skb,
++			      struct in6_addr *home,
++			      struct in6_addr *coa,
++			      struct in6_addr *cn,
++			      struct in6_addr *unused,
++			      struct mipv6_mh *mh)
++{
++	struct mipv6_mh_be *be = (struct mipv6_mh_be *)mh->data;
++	int msg_len = (mh->length+1) << 3;
++	int opt_len;
++	struct in6_addr *hoa;
++	struct bul_inval_args args;
++
++	DEBUG_FUNC();
++
++	if (msg_len > skb->len)
++		return -1;
++
++	opt_len = msg_len - sizeof(*mh) - sizeof(*be);
++
++	if (opt_len < 0) {
++		__u32 pos = (__u32)&mh->length - (__u32)skb->nh.raw;
++		icmpv6_send(skb, ICMPV6_PARAMPROB,
++			    ICMPV6_HDR_FIELD, pos, skb->dev);
++
++		DEBUG(DBG_WARNING, "Mobility Header length less than BE");
++		MIPV6_INC_STATS(n_be_drop.invalid);
++		return -1;
++	}
++
++	
++	if (!ipv6_addr_any(&be->home_addr))
++		hoa = &be->home_addr;
++	else
++		hoa = home;
++
++	MIPV6_INC_STATS(n_be_rcvd);
++
++	args.all_rr_states = 0;
++	args.cn = cn;
++	args.mn = hoa;
++
++	switch (be->status) {
++	case 1: /* Home Address Option used without a binding */
++		/* Get ULP information about CN-MN communication.  If
++                   nothing in progress, MUST delete.  Otherwise MAY
++                   ignore. */
++		args.all_rr_states = 1;
++	case 2: /* Received unknown MH type */
++		/* If not expecting ack, SHOULD ignore.  If MH
++                   extension in use, stop it.  If not, stop RO for
++                   this CN. */
++		write_lock(&bul_lock);
++		mipv6_bul_iterate(mn_bul_invalidate, &args);
++		write_unlock(&bul_lock);
++		break;
++	}
++
++	return 0;
++}
++
++/*
++ * mipv6_bu_rate_limit() : Takes a bulentry, a COA and 'flags' to check
++ * whether BU being sent is for Home Registration or not.
++ *
++ * If the number of BU's sent is fewer than MAX_FAST_UPDATES, this BU
++ * is allowed to be sent at the MAX_UPDATE_RATE.
++ * If the number of BU's sent is greater than or equal to MAX_FAST_UPDATES,
++ * this BU is allowed to be sent at the SLOW_UPDATE_RATE.
++ *
++ * Assumption : This function is not re-entrant. and the caller holds the
++ * bulentry lock (by calling mipv6_bul_get()) to stop races with other
++ * CPU's executing this same function.
++ *
++ * Side-Effects. Either of the following could  on success :
++ *	1. Sets consecutive_sends to 1 if the entry is a Home agent
++ *	   registration or the COA has changed.
++ *	2. Increments consecutive_sends if the number of BU's sent so
++ *	   far is less than MAX_FAST_UPDATES, and this BU is being sent
++ *	   atleast MAX_UPDATE_RATE after previous one.
++ * 
++ * Return Value : 0 on Success, -1 on Failure
++ */
++static int mipv6_bu_rate_limit(struct mipv6_bul_entry *bulentry, 
++			       struct in6_addr *coa, __u8 flags)
++{
++	if ((flags & MIPV6_BU_F_HOME) || ipv6_addr_cmp(&bulentry->coa, coa)) {
++		/* Home Agent Registration or different COA - restart from 1 */
++		bulentry->consecutive_sends = 1;
++		return 0;
++	}
++
++	if (bulentry->consecutive_sends < MAX_FAST_UPDATES) {
++		/* First MAX_FAST_UPDATES can be sent at MAX_UPDATE_RATE */
++		if (jiffies - bulentry->lastsend < MAX_UPDATE_RATE * HZ) {
++			return -1;
++		}
++		bulentry->consecutive_sends ++;
++	} else {
++		/* Remaining updates SHOULD be sent at SLOW_UPDATE_RATE */
++		if (jiffies - bulentry->lastsend < SLOW_UPDATE_RATE * HZ) {
++			return -1;
++		}
++		/* Don't inc 'consecutive_sends' to avoid overflow to zero */
++	}
++	/* OK to send a BU */
++	return 0;
++}
++
++/**
++ * mipv6_send_bu - send a Binding Update 
++ * @saddr: source address for BU
++ * @daddr: destination address for BU
++ * @coa: care-of address for MN
++ * @initdelay: initial BA wait timeout
++ * @maxackdelay: maximum BA wait timeout
++ * @exp: exponention back off
++ * @flags: flags for BU
++ * @lifetime: granted lifetime for binding
++ * @ops: mobility options
++ *
++ * Send a binding update.  'flags' may contain any of %MIPV6_BU_F_ACK,
++ * %MIPV6_BU_F_HOME, %MIPV6_BU_F_ROUTER bitwise ORed.  If
++ * %MIPV6_BU_F_ACK is included retransmission will be attempted until
++ * the update has been acknowledged.  Retransmission is done if no
++ * acknowledgement is received within @initdelay seconds.  @exp
++ * specifies whether to use exponential backoff (@exp != 0) or linear
++ * backoff (@exp == 0).  For exponential backoff the time to wait for
++ * an acknowledgement is doubled on each retransmission until a delay
++ * of @maxackdelay, after which retransmission is no longer attempted.
++ * For linear backoff the delay is kept constant and @maxackdelay
++ * specifies the maximum number of retransmissions instead.  If
++ * sub-options are present ops must contain all sub-options to be
++ * added.  On a mobile node, use the mobile node's home address for
++ * @saddr.  Returns 0 on success, non-zero on failure.
++ *
++ * Caller may not hold @bul_lock.
++ **/
++int mipv6_send_bu(struct in6_addr *saddr, struct in6_addr *daddr,
++		  struct in6_addr *coa, u32 initdelay, 
++		  u32 maxackdelay, u8 exp, u8 flags, u32 lifetime,
++		  struct mipv6_mh_opt *ops)
++{
++	int ret;
++	__u8 state;
++	 __u16 seq = 0;
++	int (*callback)(struct mipv6_bul_entry *);
++	__u32 callback_time;
++	struct mipv6_bul_entry *bulentry;
++	
++	/* First a sanity check: don't send BU to local addresses */
++	if(ipv6_chk_addr(daddr, NULL)) {
++		DEBUG(DBG_ERROR, "BUG: Trying to send BU to local address");
++		return -1;
++	}
++	DEBUG(DBG_INFO, "Sending BU to CN  %x:%x:%x:%x:%x:%x:%x:%x "
++	      "for home address %x:%x:%x:%x:%x:%x:%x:%x", 
++	      NIPV6ADDR(daddr), NIPV6ADDR(saddr));
++
++	if ((bulentry = mipv6_bul_get(daddr, saddr)) != NULL) {
++		if (bulentry->state == ACK_ERROR) {
++			/*
++			 * Don't send any more BU's to nodes which don't
++			 * understanding one. 
++			 */
++			DEBUG(DBG_INFO, "Not sending BU to node which doesn't"
++			      " understand one");
++			return -1;
++		}
++		if (mipv6_bu_rate_limit(bulentry, coa, flags) < 0) {
++			DEBUG(DBG_DATADUMP, "Limiting BU sent.");
++			return 0;
++		}
++	}
++
++	switch (mipv6_rr_state(bulentry, saddr, coa, flags)) {
++	case INPROGRESS_RR:
++		/* We are already doing RR, don't do BU at this time, it is
++		 * done automatically later */
++		DEBUG(DBG_INFO, "RR in progress not sending BU");
++		return 0;
++
++	case DO_RR:
++		/* Just do RR and return, BU is done automatically later */
++		DEBUG(DBG_INFO, "starting RR" );
++		mipv6_RR_start(saddr, daddr, coa, bulentry, initdelay,
++			       maxackdelay, flags, lifetime, ops);
++		return 0;
++		
++	case NO_RR:
++		DEBUG(DBG_DATADUMP, "No RR necessary" );
++	default:
++		break;
++	}
++
++	if (bulentry)
++		seq = bulentry->seq + 1;
++	
++	/* Add to binding update list */
++	
++	if (flags & MIPV6_BU_F_ACK) {
++		DEBUG(DBG_INFO, "Setting bul callback to bul_resend_exp");
++		/* Send using exponential backoff */
++		state = RESEND_EXP;
++		callback = bul_resend_exp;
++		callback_time = initdelay;
++	} else {
++		DEBUG(DBG_INFO, "Setting bul callback to bul_entry_expired");
++		/* No acknowledgement/resending required */
++		state = ACK_OK;	/* pretend we got an ack */
++		callback = bul_entry_expired;
++		callback_time = lifetime;
++	}
++
++	/* BU only for the home address */
++	/* We must hold bul_lock (write) while calling add */
++	if ((bulentry = mipv6_bul_add(daddr, saddr, coa, lifetime, seq,
++				      flags, callback, callback_time, 
++				      state, initdelay, maxackdelay, ops, 
++				      NULL)) == NULL) {
++		DEBUG(DBG_INFO, "couldn't update BUL");
++		return 0;
++	}
++	ret = send_bu_msg(bulentry);
++
++	return ret;
++}
++
++int __init mipv6_mh_mn_init(void)
++{
++	mipv6_mh_register(MIPV6_MH_HOT, mipv6_handle_mh_HC_test);
++	mipv6_mh_register(MIPV6_MH_COT, mipv6_handle_mh_HC_test);
++	mipv6_mh_register(MIPV6_MH_BA, mipv6_handle_mh_ba);
++	mipv6_mh_register(MIPV6_MH_BRR, mipv6_handle_mh_brr);
++	mipv6_mh_register(MIPV6_MH_BE, mipv6_handle_mh_be);
++
++	return 0;
++}
++
++void __exit mipv6_mh_mn_exit(void)
++{
++	mipv6_mh_unregister(MIPV6_MH_HOT);
++	mipv6_mh_unregister(MIPV6_MH_COT);
++	mipv6_mh_unregister(MIPV6_MH_BA);
++	mipv6_mh_unregister(MIPV6_MH_BRR);
++	mipv6_mh_unregister(MIPV6_MH_BE);
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/module_cn.c
+@@ -0,0 +1,167 @@
++/*
++ *	Mobile IPv6 Common Module
++ *
++ *	Authors:
++ *	Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *	Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License
++ *	as published by the Free Software Foundation; either version
++ *	2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/init.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/mipglue.h>
++
++#include "bcache.h"
++#include "mipv6_icmp.h"
++#include "stats.h"
++#include "mobhdr.h"
++#include "exthdrs.h"
++
++int mipv6_debug = 1;
++
++#if defined(MODULE) && LINUX_VERSION_CODE > 0x20115
++MODULE_AUTHOR("MIPL Team");
++MODULE_DESCRIPTION("Mobile IPv6");
++MODULE_LICENSE("GPL");
++MODULE_PARM(mipv6_debug, "i");
++#endif
++
++#include "config.h"
++
++struct mip6_func mip6_fn;
++struct mip6_conf mip6node_cnf = {
++	capabilities:		CAP_CN,
++	accept_ret_rout:	1,
++	max_rtr_reachable_time:	0,
++	eager_cell_switching:	0,
++	max_num_tunnels:	0,
++	min_num_tunnels:	0,
++	binding_refresh_advice:	0,
++	bu_lladdr:		0,
++	bu_keymgm:		0,
++	bu_cn_ack:		0
++};
++
++#define MIPV6_BCACHE_SIZE 128
++
++/**********************************************************************
++ *
++ * MIPv6 CN Module Init / Cleanup
++ *
++ **********************************************************************/
++
++#ifdef CONFIG_SYSCTL
++/* Sysctl table */
++ctl_table mipv6_mobility_table[] = {
++	{NET_IPV6_MOBILITY_DEBUG, "debuglevel",
++	 &mipv6_debug, sizeof(int), 0644, NULL,
++	 &proc_dointvec},
++	{NET_IPV6_MOBILITY_RETROUT, "accept_return_routability",
++	 &mip6node_cnf.accept_ret_rout, sizeof(int), 0644, NULL,
++	 &proc_dointvec},
++	{0}
++};
++ctl_table mipv6_table[] = {
++	{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, mipv6_mobility_table},
++	{0}
++};
++
++static struct ctl_table_header *mipv6_sysctl_header;
++static struct ctl_table mipv6_net_table[];
++static struct ctl_table mipv6_root_table[];
++
++ctl_table mipv6_net_table[] = {
++	{NET_IPV6, "ipv6", NULL, 0, 0555, mipv6_table},
++	{0}
++};
++
++ctl_table mipv6_root_table[] = {
++	{CTL_NET, "net", NULL, 0, 0555, mipv6_net_table},
++	{0}
++};
++#endif /* CONFIG_SYSCTL */
++
++extern void mipv6_rr_init(void);
++
++/*  Initialize the module  */
++static int __init mip6_init(void)
++{
++	int err = 0;
++
++	printk(KERN_INFO "MIPL Mobile IPv6 for Linux Correspondent Node %s (%s)\n",
++	       MIPLVERSION, MIPV6VERSION);
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++	printk(KERN_INFO "Debug-level: %d\n", mipv6_debug);
++#endif
++
++	if ((err = mipv6_bcache_init(MIPV6_BCACHE_SIZE)) < 0)
++		goto bcache_fail;
++
++	if ((err = mipv6_icmpv6_init()) < 0)
++		goto icmp_fail;
++
++	if ((err = mipv6_stats_init()) < 0)
++		goto stats_fail;
++	mipv6_rr_init();
++
++#ifdef CONFIG_SYSCTL
++	mipv6_sysctl_header = register_sysctl_table(mipv6_root_table, 0);
++#endif
++
++	if ((err = mipv6_mh_common_init()) < 0)
++		goto mh_fail;
++
++	MIPV6_SETCALL(mipv6_modify_txoptions, mipv6_modify_txoptions);
++		
++	MIPV6_SETCALL(mipv6_handle_homeaddr, mipv6_handle_homeaddr);
++	MIPV6_SETCALL(mipv6_icmp_swap_addrs, mipv6_icmp_swap_addrs);
++
++	return 0;
++
++mh_fail:
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++	mipv6_stats_exit();
++stats_fail:
++	mipv6_icmpv6_exit();
++icmp_fail:
++	mipv6_bcache_exit();
++bcache_fail:
++	return err;
++}
++module_init(mip6_init);
++
++#ifdef MODULE
++/*  Cleanup module  */
++static void __exit mip6_exit(void)
++{
++	printk(KERN_INFO "mip6_base.o exiting.\n");
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++
++	/* Invalidate all custom kernel hooks.  No need to do this
++           separately for all hooks. */
++	mipv6_invalidate_calls();
++
++	mipv6_mh_common_exit();
++	mipv6_stats_exit();
++	mipv6_icmpv6_exit();
++	mipv6_bcache_exit();
++}
++module_exit(mip6_exit);
++#endif /* MODULE */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/module_ha.c
+@@ -0,0 +1,264 @@
++/*
++ *	Mobile IPv6 Home Agent Module
++ *
++ *	Authors:
++ *	Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *	Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License
++ *	as published by the Free Software Foundation; either version
++ *	2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/init.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/mipglue.h>
++#include <net/addrconf.h>
++
++#include "mobhdr.h"
++#include "tunnel_ha.h"
++#include "ha.h"
++#include "halist.h"
++#include "mipv6_icmp.h"
++//#include "prefix.h"
++#include "bcache.h"
++#include "debug.h"
++
++int mipv6_use_auth = 0;
++
++#if defined(MODULE) && LINUX_VERSION_CODE > 0x20115
++MODULE_AUTHOR("MIPL Team");
++MODULE_DESCRIPTION("Mobile IPv6 Home Agent");
++MODULE_LICENSE("GPL");
++#endif
++
++#include "config.h"
++
++#define MIPV6_HALIST_SIZE 128
++struct ha_info_opt {
++	u8 type;
++	u8 len;
++	u16 res;
++	u16 pref;
++	u16 ltime;
++};
++/*
++ * Called from ndisc.c's router_discovery.
++ */
++static int mipv6_ha_ra_rcv(struct sk_buff *skb, struct ndisc_options *ndopts)
++{
++	unsigned int ha_info_pref = 0, ha_info_lifetime;
++	int ifi = ((struct inet6_skb_parm *)skb->cb)->iif;
++	struct ra_msg *ra = (struct ra_msg *) skb->h.raw;
++	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
++	struct in6_addr ll_addr;
++	struct hal {
++		struct in6_addr prefix;
++		int plen;
++		struct hal *next;
++	};
++	
++	DEBUG_FUNC();
++
++	ha_info_lifetime = ntohs(ra->icmph.icmp6_rt_lifetime);
++	ipv6_addr_copy(&ll_addr, saddr);
++	
++	if (ndopts->nd_opts_hai) {
++		struct ha_info_opt *hai = (struct ha_info_opt *)ndopts->nd_opts_hai;
++		ha_info_pref = ntohs(hai->pref);
++		ha_info_lifetime = ntohs(hai->ltime);
++		DEBUG(DBG_DATADUMP,
++		      "received home agent info with preference : %d and lifetime : %d",
++		      ha_info_pref, ha_info_lifetime);
++	}
++	if (ndopts->nd_opts_pi) {
++		struct nd_opt_hdr *p;
++		for (p = ndopts->nd_opts_pi;
++		     p;
++		     p = ndisc_next_option(p, ndopts->nd_opts_pi_end)) {
++			struct prefix_info *pinfo;
++			
++			pinfo = (struct prefix_info *) p;
++			
++			if (pinfo->router_address) {
++				DEBUG(DBG_DATADUMP, "Adding router address to "
++				      "ha queue \n");
++				/* If RA has H bit set and Prefix Info
++				 * Option R bit set, queue this
++				 * address to be added to Home Agents
++				 * List.  
++				 */
++				if (ipv6_addr_type(&pinfo->prefix) &
++				    IPV6_ADDR_LINKLOCAL)
++					continue;
++				if (!ra->icmph.icmp6_home_agent || !ha_info_lifetime) {
++					mipv6_halist_delete(&pinfo->prefix); 
++					continue;
++				} else {
++					
++					mipv6_halist_add(ifi, &pinfo->prefix, 
++							 pinfo->prefix_len, &ll_addr, 
++							 ha_info_pref, ha_info_lifetime);
++				} 
++				
++			}
++			
++		}
++	}
++	return MIPV6_ADD_RTR;
++}
++
++/**********************************************************************
++ *
++ * MIPv6 Module Init / Cleanup
++ *
++ **********************************************************************/
++
++#ifdef CONFIG_SYSCTL
++/* Sysctl table */
++extern int 
++mipv6_max_tnls_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++extern int 
++mipv6_min_tnls_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++int max_adv = ~(u16)0;
++int min_zero = 0;
++ctl_table mipv6_mobility_table[] = {
++	{NET_IPV6_MOBILITY_BINDING_REFRESH, "binding_refresh_advice",
++	 &mip6node_cnf.binding_refresh_advice, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_adv},
++
++	{NET_IPV6_MOBILITY_MAX_TNLS, "max_tnls", &mipv6_max_tnls, sizeof(int),
++	 0644, NULL, &mipv6_max_tnls_sysctl},
++	{NET_IPV6_MOBILITY_MIN_TNLS, "min_tnls", &mipv6_min_tnls, sizeof(int),
++	 0644, NULL, &mipv6_min_tnls_sysctl},
++	{0}
++};
++ctl_table mipv6_table[] = {
++	{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, mipv6_mobility_table},
++	{0}
++};
++
++static struct ctl_table_header *mipv6_sysctl_header;
++static struct ctl_table mipv6_net_table[];
++static struct ctl_table mipv6_root_table[];
++
++ctl_table mipv6_net_table[] = {
++	{NET_IPV6, "ipv6", NULL, 0, 0555, mipv6_table},
++	{0}
++};
++
++ctl_table mipv6_root_table[] = {
++	{CTL_NET, "net", NULL, 0, 0555, mipv6_net_table},
++	{0}
++};
++#endif /* CONFIG_SYSCTL */
++
++extern void mipv6_check_dad(struct in6_addr *haddr);
++extern void mipv6_dad_init(void);
++extern void mipv6_dad_exit(void);
++extern int mipv6_forward(struct sk_buff *);
++
++/*  Initialize the module  */
++static int __init mip6_ha_init(void)
++{
++	int err = 0;
++
++	printk(KERN_INFO "MIPL Mobile IPv6 for Linux Home Agent %s (%s)\n",
++	       MIPLVERSION, MIPV6VERSION);
++	mip6node_cnf.capabilities = CAP_CN | CAP_HA;
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_dhaad_req_rcv = mipv6_icmpv6_rcv_dhaad_req;
++	mip6_fn.icmpv6_pfxadv_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_pfxsol_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_paramprob_rcv = mipv6_icmpv6_no_rcv;
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++	printk(KERN_INFO "Debug-level: %d\n", mipv6_debug);
++#endif
++
++#ifdef CONFIG_SYSCTL
++	mipv6_sysctl_header = register_sysctl_table(mipv6_root_table, 0);
++#endif
++	mipv6_initialize_tunnel();
++
++	if ((err = mipv6_ha_init()) < 0)
++		goto ha_fail;
++
++	MIPV6_SETCALL(mipv6_ra_rcv, mipv6_ha_ra_rcv);
++	MIPV6_SETCALL(mipv6_forward, mipv6_forward);
++	mipv6_dad_init();
++	MIPV6_SETCALL(mipv6_check_dad, mipv6_check_dad);
++
++	if ((err = mipv6_halist_init(MIPV6_HALIST_SIZE)) < 0)
++		goto halist_fail;
++
++//	mipv6_initialize_pfx_icmpv6();
++
++	return 0;
++
++halist_fail:
++	mipv6_dad_exit();
++	mipv6_ha_exit();
++ha_fail:
++	mipv6_shutdown_tunnel();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	MIPV6_RESETCALL(mipv6_ra_rcv);
++	MIPV6_RESETCALL(mipv6_forward);
++	MIPV6_RESETCALL(mipv6_check_dad);
++
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++	return err;
++}
++module_init(mip6_ha_init);
++
++#ifdef MODULE
++/*  Cleanup module  */
++static void __exit mip6_ha_exit(void)
++{
++	printk(KERN_INFO "mip6_ha.o exiting.\n");
++	mip6node_cnf.capabilities &= ~(int)CAP_HA;
++
++	mipv6_bcache_cleanup(HOME_REGISTRATION);
++
++	MIPV6_RESETCALL(mipv6_ra_rcv);
++	MIPV6_RESETCALL(mipv6_forward);
++	MIPV6_RESETCALL(mipv6_check_dad);
++
++	mipv6_halist_exit();
++//	mipv6_shutdown_pfx_icmpv6();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	mipv6_dad_exit();
++	mipv6_ha_exit();
++	mipv6_shutdown_tunnel();
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++}
++module_exit(mip6_ha_exit);
++#endif /* MODULE */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/module_mn.c
+@@ -0,0 +1,188 @@
++/*
++ *	Mobile IPv6 Mobile Node Module
++ *
++ *	Authors:
++ *	Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *	Antti Tuominen          <ajtuomin@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License
++ *	as published by the Free Software Foundation; either version
++ *	2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/init.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/mipglue.h>
++
++extern int mipv6_debug;
++int mipv6_use_auth = 0;
++
++#if defined(MODULE) && LINUX_VERSION_CODE > 0x20115
++MODULE_AUTHOR("MIPL Team");
++MODULE_DESCRIPTION("Mobile IPv6 Mobile Node");
++MODULE_LICENSE("GPL");
++MODULE_PARM(mipv6_debug, "i");
++#endif
++
++#include "config.h"
++
++#include "mobhdr.h"
++#include "mn.h"
++#include "mipv6_icmp.h"
++//#include "prefix.h"
++
++/* TODO: These will go as soon as we get rid of the last two ioctls */
++extern int mipv6_ioctl_mn_init(void);
++extern void mipv6_ioctl_mn_exit(void);
++
++/**********************************************************************
++ *
++ * MIPv6 Module Init / Cleanup
++ *
++ **********************************************************************/
++
++#ifdef CONFIG_SYSCTL
++/* Sysctl table */
++
++extern int max_rtr_reach_time;
++extern int eager_cell_switching;
++
++static int max_reach = 1000;
++static int min_reach = 1;
++static int max_one = 1;
++static int min_zero = 0;
++
++extern int 
++mipv6_mdetect_mech_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++extern int 
++mipv6_router_reach_sysctl(ctl_table *, int, struct file *, void *, size_t *);
++
++ctl_table mipv6_mobility_table[] = {
++	{NET_IPV6_MOBILITY_BU_F_LLADDR, "bu_flag_lladdr",
++	 &mip6node_cnf.bu_lladdr, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++	{NET_IPV6_MOBILITY_BU_F_KEYMGM, "bu_flag_keymgm",
++	 &mip6node_cnf.bu_keymgm, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++	{NET_IPV6_MOBILITY_BU_F_CN_ACK, "bu_flag_cn_ack",
++	 &mip6node_cnf.bu_cn_ack, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++
++	{NET_IPV6_MOBILITY_ROUTER_REACH, "max_router_reachable_time",
++	 &max_rtr_reach_time, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_reach, &max_reach},
++
++	{NET_IPV6_MOBILITY_MDETECT_MECHANISM, "eager_cell_switching",
++	 &eager_cell_switching, sizeof(int), 0644, NULL,
++	 &proc_dointvec_minmax, &sysctl_intvec, 0, &min_zero, &max_one},
++
++	{0}
++};
++ctl_table mipv6_table[] = {
++	{NET_IPV6_MOBILITY, "mobility", NULL, 0, 0555, mipv6_mobility_table},
++	{0}
++};
++
++static struct ctl_table_header *mipv6_sysctl_header;
++static struct ctl_table mipv6_net_table[];
++static struct ctl_table mipv6_root_table[];
++
++ctl_table mipv6_net_table[] = {
++	{NET_IPV6, "ipv6", NULL, 0, 0555, mipv6_table},
++	{0}
++};
++
++ctl_table mipv6_root_table[] = {
++	{CTL_NET, "net", NULL, 0, 0555, mipv6_net_table},
++	{0}
++};
++#endif /* CONFIG_SYSCTL */
++
++/*  Initialize the module  */
++static int __init mip6_mn_init(void)
++{
++	int err = 0;
++
++	printk(KERN_INFO "MIPL Mobile IPv6 for Linux Mobile Node %s (%s)\n",
++	       MIPLVERSION, MIPV6VERSION);
++	mip6node_cnf.capabilities = CAP_CN | CAP_MN;
++
++#ifdef CONFIG_IPV6_MOBILITY_DEBUG
++	printk(KERN_INFO "Debug-level: %d\n", mipv6_debug);
++#endif
++
++#ifdef CONFIG_SYSCTL
++	mipv6_sysctl_header = register_sysctl_table(mipv6_root_table, 0);
++#endif
++	if ((err = mipv6_mn_init()) < 0)
++		goto mn_fail;
++
++	mipv6_mh_mn_init();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = mipv6_icmpv6_rcv_dhaad_rep;
++	mip6_fn.icmpv6_dhaad_req_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_pfxadv_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_pfxsol_rcv = mipv6_icmpv6_no_rcv;
++	mip6_fn.icmpv6_paramprob_rcv = mipv6_icmpv6_rcv_paramprob;
++
++//	mipv6_initialize_pfx_icmpv6();
++
++	if ((err = mipv6_ioctl_mn_init()) < 0)
++		goto ioctl_fail;
++
++	return 0;
++
++ioctl_fail:
++//	mipv6_shutdown_pfx_icmpv6();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	mipv6_mh_mn_exit();
++	mipv6_mn_exit();
++mn_fail:
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++	return err;
++}
++module_init(mip6_mn_init);
++
++#ifdef MODULE
++/*  Cleanup module  */
++static void __exit mip6_mn_exit(void)
++{
++	printk(KERN_INFO "mip6_mn.o exiting.\n");
++	mip6node_cnf.capabilities &= ~(int)CAP_MN;
++
++	mipv6_ioctl_mn_exit();
++//	mipv6_shutdown_pfx_icmpv6();
++
++	mip6_fn.icmpv6_dhaad_rep_rcv = NULL;
++	mip6_fn.icmpv6_dhaad_req_rcv = NULL;
++	mip6_fn.icmpv6_pfxadv_rcv = NULL;
++	mip6_fn.icmpv6_pfxsol_rcv = NULL;
++	mip6_fn.icmpv6_paramprob_rcv = NULL;
++
++	mipv6_mn_exit();
++
++/* common cleanup */
++#ifdef CONFIG_SYSCTL
++	unregister_sysctl_table(mipv6_sysctl_header);
++#endif
++}
++module_exit(mip6_mn_exit);
++#endif /* MODULE */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/multiaccess_ctl.c
+@@ -0,0 +1,287 @@
++/*  
++ * 2001 (c) Oy L M Ericsson Ab
++ *
++ * Author: NomadicLab / Ericsson Research <ipv6@nomadiclab.com>
++ *
++ * $Id$
++ *
++ */
++
++/*
++ * Vertical hand-off information manager
++ */
++
++#include <linux/netdevice.h>
++#include <linux/in6.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/proc_fs.h>
++#include <linux/string.h>
++#include <linux/kernel.h>
++#include <asm/io.h>
++#include <asm/uaccess.h>
++#include <linux/list.h>
++#include "multiaccess_ctl.h"
++#include "debug.h"
++
++/*
++ * Local variables
++ */
++static LIST_HEAD(if_list);
++
++/* Internal interface information list */
++struct ma_if_info {
++	struct list_head list;
++	int        interface_id;
++	int        preference;
++	__u8       status;
++};
++
++/**
++ * ma_ctl_get_preference - get preference value for interface
++ * @ifi: interface index
++ * 
++ * Returns integer value preference for given interface.
++ **/
++int ma_ctl_get_preference(int ifi)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++	int pref = 0;
++
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == ifi) {
++			pref = info->preference;
++			return pref;
++		}
++	}
++	return -1;
++}
++/**
++ * ma_ctl_get_preference - get preference value for interface
++ * @ifi: interface index
++ * 
++ * Returns integer value interface index for interface with highest preference.
++ **/
++int ma_ctl_get_preferred_if(void)
++{
++	struct list_head *lh;
++	struct ma_if_info *info, *pref_if = NULL;
++	
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (!pref_if || (info->preference > pref_if->preference)) {
++			pref_if = info;
++		}
++	}
++	if (pref_if) return pref_if->interface_id;
++	return 0;
++}
++/**
++ * ma_ctl_set_preference - set preference for interface
++ * @arg: ioctl args
++ *
++ * Sets preference of an existing interface (called by ioctl).
++ **/
++void ma_ctl_set_preference(unsigned long arg)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++	struct ma_if_uinfo uinfo;
++	
++	memset(&uinfo, 0, sizeof(struct ma_if_uinfo));
++	if (copy_from_user(&uinfo, (struct ma_if_uinfo *)arg, 
++			   sizeof(struct ma_if_uinfo)) < 0) {
++		DEBUG(DBG_WARNING, "copy_from_user failed");
++		return;
++	}
++
++	/* check if the interface exists */
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == uinfo.interface_id) {
++			info->preference = uinfo.preference;
++			return;
++		}
++	}
++}
++
++/**
++ * ma_ctl_add_iface - add new interface to list
++ * @if_index: interface index
++ *
++ * Adds new interface entry to preference list.  Preference is set to
++ * the same value as @if_index.  Entry @status is set to
++ * %MA_IFACE_NOT_USED.
++ **/
++void ma_ctl_add_iface(int if_index)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++
++	DEBUG_FUNC();
++	
++	/* check if the interface already exists */
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == if_index) {
++			info->status = MA_IFACE_NOT_USED;
++			info->preference = if_index;
++			return;
++		}
++	}
++
++	info = kmalloc(sizeof(struct ma_if_info), GFP_ATOMIC);
++	if (info == NULL) {
++		DEBUG(DBG_ERROR, "Out of memory");
++		return;
++	}
++	memset(info, 0, sizeof(struct ma_if_info));
++	info->interface_id = if_index;
++	info->preference = if_index;
++	info->status = MA_IFACE_NOT_USED;
++	list_add(&info->list, &if_list);
++}
++
++/**
++ * ma_ctl_del_iface - remove entry from the list
++ * @if_index: interface index
++ *
++ * Removes entry for interface @if_index from preference list.
++ **/
++int ma_ctl_del_iface(int if_index)
++{
++	struct list_head *lh, *next;
++	struct ma_if_info *info;
++
++	DEBUG_FUNC();
++
++	/* if the iface exists, change availability to 0 */
++	list_for_each_safe(lh, next, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (info->interface_id == if_index) {
++			list_del(&info->list);
++			kfree(info);
++			return 0;
++		}
++	}
++
++	return -1;
++}
++
++/**
++ * ma_ctl_upd_iface - update entry (and list)
++ * @if_index: interface to update
++ * @status: new status for interface
++ * @change_if_index: new interface
++ *
++ * Updates @if_index entry on preference list.  Entry status is set to
++ * @status.  If new @status is %MA_IFACE_CURRENT, updates list to have
++ * only one current device.  If @status is %MA_IFACE_NOT_PRESENT,
++ * entry is deleted and further if entry had %MA_IFACE_CURRENT set,
++ * new current device is looked up and returned in @change_if_index.
++ * New preferred interface is also returned if current device changes
++ * to %MA_IFACE_NOT_USED.  Returns 0 on success, otherwise negative.
++ **/
++int ma_ctl_upd_iface(int if_index, int status, int *change_if_index)
++{
++	struct list_head *lh, *tmp;
++	struct ma_if_info *info, *pref = NULL;
++	int found = 0;
++
++	DEBUG_FUNC();
++
++	*change_if_index = 0;
++
++	/* check if the interface exists */
++	list_for_each_safe(lh, tmp, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		if (status == MA_IFACE_NOT_PRESENT) {
++			if (info->interface_id == if_index) {
++				list_del_init(&info->list);
++				kfree(info);
++				found = 1;
++				break;
++			}
++		} else if (status == MA_IFACE_CURRENT) {
++			if (info->interface_id == if_index) {
++				info->status |= MA_IFACE_CURRENT;
++				found = 1;
++			} else {
++				info->status |= MA_IFACE_NOT_USED;
++			}
++		} else if (status == MA_IFACE_NOT_USED) {
++			if (info->interface_id == if_index) {
++				if (info->status | MA_IFACE_CURRENT) {
++					found = 1;
++				}
++				info->status &= !MA_IFACE_CURRENT;
++				info->status |= MA_IFACE_NOT_USED;
++				info->status &= !MA_IFACE_HAS_ROUTER;
++			}
++			break;
++		} else if (status == MA_IFACE_HAS_ROUTER) {
++			if (info->interface_id == if_index) {
++				info->status |= MA_IFACE_HAS_ROUTER;
++			}
++			return 0;
++		}
++	}
++
++	if (status & (MA_IFACE_NOT_USED|MA_IFACE_NOT_PRESENT) && found) {
++		/* select new interface */
++		list_for_each(lh, &if_list) {
++			info = list_entry(lh, struct ma_if_info, list);
++			if (pref == NULL || ((info->preference > pref->preference) && 
++					     info->status & MA_IFACE_HAS_ROUTER))
++				pref = info;
++		}
++		if (pref) {
++			*change_if_index = pref->interface_id;
++			pref->status |= MA_IFACE_CURRENT;
++		} else {
++			*change_if_index = -1;
++		}
++		return 0;
++	}
++
++	if (found) return 0;
++
++	return -1;
++}
++
++static int if_proc_info(char *buffer, char **start, off_t offset,
++			int length)
++{
++	struct list_head *lh;
++	struct ma_if_info *info;
++	int len = 0;
++
++	list_for_each(lh, &if_list) {
++		info = list_entry(lh, struct ma_if_info, list);
++		len += sprintf(buffer + len, "%02d %010d %1d %1d\n",
++			       info->interface_id, info->preference,
++			       !!(info->status & MA_IFACE_HAS_ROUTER),
++			       !!(info->status & MA_IFACE_CURRENT));
++	}
++
++	*start = buffer + offset;
++
++	len -= offset;
++
++	if (len > length) len = length;
++
++	return len;
++
++}
++
++void ma_ctl_init(void)
++{
++	proc_net_create("mip6_iface", 0, if_proc_info);
++}
++
++void ma_ctl_clean(void)
++{
++	proc_net_remove("mip6_iface");
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/multiaccess_ctl.h
+@@ -0,0 +1,77 @@
++/*  
++ * 2001 (c) Oy L M Ericsson Ab
++ *
++ * Author: NomadicLab / Ericsson Research <ipv6@nomadiclab.com>
++ *
++ * $Id$
++ *
++ */
++
++#ifndef _MULTIACCESS_CTL_H
++#define _MULTIACCESS_CTL_H
++
++/* status */
++#define MA_IFACE_NOT_PRESENT 0x01
++#define MA_IFACE_NOT_USED    0x02
++#define MA_IFACE_HAS_ROUTER  0x04
++#define MA_IFACE_CURRENT     0x10
++
++struct ma_if_uinfo {
++	int        interface_id;
++	int        preference;
++	__u8       status;
++};
++/*
++ *  @ma_ctl_get_preferred_id: returns most preferred interface id
++ */
++int ma_ctl_get_preferred_if(void);
++
++/* @ma_ctl_get_preference: returns preference for an interface
++ * @name: name of the interface (dev->name)
++ */
++int ma_ctl_get_preference(int ifi);
++
++/*
++ * Public function: ma_ctl_set_preference
++ * Description: Set preference of an existing interface (called by ioctl)
++ * Returns:
++ */
++void ma_ctl_set_preference(unsigned long);
++
++/*
++ * Public function: ma_ctl_add_iface
++ * Description: Inform control module to insert a new interface
++ * Returns: 0 if success, any other number means an error
++ */
++void ma_ctl_add_iface(int);
++
++/*
++ * Public function: ma_ctl_del_iface
++ * Description: Inform control module to remove an obsolete interface
++ * Returns: 0 if success, any other number means an error
++ */
++int ma_ctl_del_iface(int);
++
++/*
++ * Public function: ma_ctl_upd_iface
++ * Description: Inform control module of status change.
++ * Returns: 0 if success, any other number means an error
++ */
++int ma_ctl_upd_iface(int, int, int *);
++
++/*
++ * Public function: ma_ctl_init
++ * Description: XXX
++ * Returns: XXX
++ */
++void ma_ctl_init(void);
++
++/*
++ * Public function: ma_ctl_clean
++ * Description: XXX
++ * Returns: -
++ */
++void ma_ctl_clean(void);
++
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/ndisc_ha.c
+@@ -0,0 +1,596 @@
++/*
++ *	Mobile IPv6 Duplicate Address Detection Functions
++ *
++ *	Authors:
++ *	Krishna Kumar <krkumar@us.ibm.com>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/autoconf.h>
++#include <linux/types.h>
++#include <linux/init.h>
++#include <linux/skbuff.h>
++#include <linux/in6.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/mipv6.h>
++
++#include "debug.h"
++#include "bcache.h"
++#include "ha.h" /* mipv6_generate_ll_addr */
++
++/*
++ * Binding Updates from MN are cached in this structure till DAD is performed.
++ * This structure is used to retrieve a pending Binding Update for the HA to
++ * reply to after performing DAD. The first cell is different from the rest as
++ * follows :
++ * 	1. The first cell is used to chain the remaining cells. 
++ *	2. The timeout of the first cell is used to delete expired entries
++ *	   in the list of cells, while the timeout of the other cells are
++ *	   used for timing out a NS request so as to reply to a BU.
++ *	3. The only elements of the first cell that are used are :
++ *	   next, prev, and callback_timer.
++ *
++ * TODO : Don't we need to do pneigh_lookup on the Link Local address ?
++ */
++struct mipv6_dad_cell {
++	/* Information needed for DAD management */
++	struct mipv6_dad_cell	*next;	/* Next element on the DAD list */
++	struct mipv6_dad_cell	*prev;	/* Prev element on the DAD list */
++	__u16			probes;	/* Number of times to probe for addr */
++	__u16			flags;	/* Entry flags - see below */
++	struct timer_list	callback_timer; /* timeout for entry */
++
++	/* Information needed for performing DAD */
++	struct inet6_ifaddr	*ifp;
++	int			ifindex;
++	struct in6_addr		daddr;
++	struct in6_addr		haddr;		/* home address */
++	struct in6_addr		ll_haddr;	/* Link Local value of haddr */
++	struct in6_addr		coa;
++	struct in6_addr         rep_coa;
++	__u32			ba_lifetime;
++	__u16			sequence;
++	__u8			bu_flags;
++};
++
++/* Values for the 'flags' field in the mipv6_dad_cell */
++#define	DAD_INIT_ENTRY		0
++#define	DAD_DUPLICATE_ADDRESS	1
++#define	DAD_UNIQUE_ADDRESS	2
++
++/* Head of the pending DAD list */
++static struct mipv6_dad_cell dad_cell_head;
++
++/* Lock to access the pending DAD list */
++static rwlock_t dad_lock = RW_LOCK_UNLOCKED;
++
++/* Timer routine which deletes 'expired' entries in the DAD list */
++static void mipv6_dad_delete_old_entries(unsigned long unused)
++{
++	struct mipv6_dad_cell *curr, *next;
++	unsigned long next_time = 0;
++
++	write_lock(&dad_lock);
++	curr = dad_cell_head.next;
++	while (curr != &dad_cell_head) {
++		next = curr->next;
++		if (curr->flags != DAD_INIT_ENTRY) {
++			if (curr->callback_timer.expires <= jiffies) {
++				/* Entry has expired, free it up. */
++				curr->next->prev = curr->prev;
++				curr->prev->next = curr->next;
++				in6_ifa_put(curr->ifp);
++				kfree(curr);
++			} else if (next_time <
++				   curr->callback_timer.expires) {
++				next_time = curr->callback_timer.expires;
++			}
++		}
++		curr = next;
++	}
++	write_unlock(&dad_lock);
++	if (next_time) {
++		/*
++		 * Start another timer if more cells need to be removed at
++		 * a later stage.
++		 */
++		dad_cell_head.callback_timer.expires = next_time;
++		add_timer(&dad_cell_head.callback_timer);
++	}
++}
++
++/* 
++ * Queue a timeout routine to clean up 'expired' DAD entries.
++ */
++static void mipv6_start_dad_head_timer(struct mipv6_dad_cell *cell)
++{
++	unsigned long expire = jiffies +
++	    cell->ifp->idev->nd_parms->retrans_time * 10;
++
++	if (!timer_pending(&dad_cell_head.callback_timer) ||
++	    expire < dad_cell_head.callback_timer.expires) {
++		/*
++		 * Add timer if none pending, or mod the timer if new 
++		 * cell needs to be expired before existing timer runs.
++		 *
++		 * We let the cell remain as long as possible, so that
++		 * new BU's as part of retransmissions don't have to go
++		 * through DAD before replying.
++		 */
++		dad_cell_head.callback_timer.expires = expire;
++
++		/*
++		 * Keep the cell around for atleast some time to handle
++		 * retransmissions or BU's due to fast MN movement. This
++		 * is needed otherwise a previous timeout can delete all
++		 * expired entries including this new one.
++		 */
++		cell->callback_timer.expires = jiffies +
++		    cell->ifp->idev->nd_parms->retrans_time * 5;
++		if (!timer_pending(&dad_cell_head.callback_timer)) {
++			add_timer(&dad_cell_head.callback_timer);
++		} else {
++			mod_timer(&dad_cell_head.callback_timer, expire);
++		}
++	}
++}
++
++
++/* Join solicited node MC address */
++static inline void mipv6_join_sol_mc_addr(struct in6_addr *addr,
++					  struct net_device *dev)
++{
++	struct in6_addr maddr;
++
++	/* Join solicited node MC address */
++	addrconf_addr_solict_mult(addr, &maddr);
++	ipv6_dev_mc_inc(dev, &maddr);
++}
++
++/* Leave solicited node MC address */
++static inline void mipv6_leave_sol_mc_addr(struct in6_addr *addr,
++					   struct net_device *dev)
++{
++	struct in6_addr maddr;
++
++	addrconf_addr_solict_mult(addr, &maddr);
++	ipv6_dev_mc_dec(dev, &maddr);
++}
++
++/* Send a NS */
++static inline void mipv6_dad_send_ns(struct inet6_ifaddr *ifp,
++				     struct in6_addr *haddr)
++{
++	struct in6_addr unspec;
++	struct in6_addr mcaddr;
++
++	ipv6_addr_set(&unspec, 0, 0, 0, 0);
++	addrconf_addr_solict_mult(haddr, &mcaddr);
++
++	/* addr is 'unspec' since we treat this address as transient */
++	ndisc_send_ns(ifp->idev->dev, NULL, haddr, &mcaddr, &unspec);
++}
++
++/*
++ * Search for a home address in the list of pending DAD's. Called from
++ * Neighbor Advertisement
++ * Return values :
++ * 	-1 : No DAD entry found for this advertisement, or entry already
++ *	     finished processing.
++ *	0  : Entry found waiting for DAD to finish.
++ */
++static int dad_search_haddr(struct in6_addr *ll_haddr,
++			    struct in6_addr *daddr, struct in6_addr *haddr,
++			    struct in6_addr *coa, struct in6_addr *rep_coa,
++			    __u16 * seq, struct inet6_ifaddr **ifp)
++{
++	struct mipv6_dad_cell *cell;
++
++	read_lock(&dad_lock);
++	cell = dad_cell_head.next;
++	while (cell != &dad_cell_head &&
++	       ipv6_addr_cmp(&cell->ll_haddr, ll_haddr) && 
++	       ipv6_addr_cmp(&cell->haddr, ll_haddr)) {
++		cell = cell->next;
++	}
++	if (cell == &dad_cell_head || cell->flags != DAD_INIT_ENTRY) {
++		/* Not found element, or element already finished processing */
++		if (cell != &dad_cell_head) {
++			/*
++			 * Set the state to DUPLICATE, even if it was UNIQUE
++			 * earlier. It is not needed to setup timer via 
++			 * mipv6_start_dad_head_timer since this must have
++			 * already been done.
++			 */
++			cell->flags = DAD_DUPLICATE_ADDRESS;
++		}
++		read_unlock(&dad_lock);
++		return -1;
++	}
++
++	/*
++	 * The NA found an unprocessed entry in the DAD list. Expire this
++	 * entry since another node advertised this address. Caller should
++	 * reject BU (DAD failed).
++	 */
++	ipv6_addr_copy(daddr, &cell->daddr);
++	ipv6_addr_copy(haddr, &cell->haddr);
++	ipv6_addr_copy(coa, &cell->coa);
++	ipv6_addr_copy(rep_coa, &cell->rep_coa);
++	*seq = cell->sequence;
++	*ifp = cell->ifp;
++
++	if (del_timer(&cell->callback_timer) == 0) {
++		/* Timer already deleted, race with Timeout Handler */
++		/* No action needed */
++	}
++
++	cell->flags = DAD_DUPLICATE_ADDRESS;
++
++	/* Now leave this address to avoid future processing of NA's */
++	mipv6_leave_sol_mc_addr(&cell->ll_haddr, cell->ifp->idev->dev);
++	/* Leave also global address, if link local address was in use */
++	if (ipv6_addr_cmp(&cell->ll_haddr, &cell->haddr))
++	    	mipv6_leave_sol_mc_addr(&cell->haddr, cell->ifp->idev->dev);
++	/* Start dad_head timer to remove this entry */
++	mipv6_start_dad_head_timer(cell);
++
++	read_unlock(&dad_lock);
++
++	return 0;
++}
++
++/* ENTRY routine called via Neighbor Advertisement */
++void mipv6_check_dad(struct in6_addr *ll_haddr)
++{
++	struct in6_addr daddr, haddr, coa, rep_coa;
++	struct inet6_ifaddr *ifp;
++	__u16 seq;
++
++	if (dad_search_haddr(ll_haddr, &daddr, &haddr, &coa, &rep_coa, &seq,
++			     &ifp) < 0) {
++		/* 
++		 * Didn't find entry, or no action needed (the action has
++		 * already been performed).
++		 */
++		return;
++	}
++
++	/*
++	 * A DAD cell was present, meaning that there is a pending BU
++	 * request for 'haddr' - reject the BU.
++	 */
++	mipv6_bu_finish(ifp, 0, DUPLICATE_ADDR_DETECT_FAIL,
++			&daddr, &haddr, &coa, &rep_coa, 0, seq, 0, NULL);
++	return;
++}
++
++/*
++ * Check if the passed 'cell' is in the list of pending DAD's. Called from
++ * the Timeout Handler.
++ *
++ * Assumes that the caller is holding the dad_lock in reader mode.
++ */
++static int dad_search_cell(struct mipv6_dad_cell *cell)
++{
++	struct mipv6_dad_cell *tmp;
++
++	tmp = dad_cell_head.next;
++	while (tmp != &dad_cell_head && tmp != cell) {
++		tmp = tmp->next;
++	}
++	if (tmp == cell) {
++		if (cell->flags == DAD_INIT_ENTRY) {
++			/* Found valid entry */
++			if (--cell->probes == 0) {
++				/*
++				 * Retransmission's are over - return success.
++				 */
++				cell->flags = DAD_UNIQUE_ADDRESS;
++
++				/* 
++				 * Leave this address to avoid future 
++				 * processing of NA's.
++				 */
++				mipv6_leave_sol_mc_addr(&cell->ll_haddr,
++							cell->ifp->idev->
++							dev);
++				if (ipv6_addr_cmp(&cell->ll_haddr, &cell->haddr))
++					mipv6_leave_sol_mc_addr(&cell->haddr, 
++								cell->ifp->idev->dev);
++				/* start timeout to delete this cell. */
++				mipv6_start_dad_head_timer(cell);
++				return 0;
++			}
++			/*
++			 * Retransmission not finished, send another NS and
++			 * return failure.
++			 */
++			mipv6_dad_send_ns(cell->ifp, &cell->ll_haddr);
++			if (ipv6_addr_cmp(&cell->ll_haddr, &cell->haddr))
++				mipv6_leave_sol_mc_addr(&cell->haddr, 
++							cell->ifp->idev->dev);
++			cell->callback_timer.expires = jiffies +
++			    cell->ifp->idev->nd_parms->retrans_time;
++			add_timer(&cell->callback_timer);
++		} else {
++			/*
++			 * This means that an NA was received before the
++			 * timeout and when the state changed from
++			 * DAD_INIT_ENTRY, the BU got failed as a result.
++			 * There is nothing to be done.
++			 */
++		}
++	}
++	return -1;
++}
++
++/* ENTRY routine called via Timeout */
++static void mipv6_dad_timeout(unsigned long arg)
++{
++	__u8 ba_status = SUCCESS;
++	struct in6_addr daddr;
++	struct in6_addr haddr;
++	struct in6_addr coa;
++	struct in6_addr rep_coa;
++	struct inet6_ifaddr *ifp;
++	int ifindex;
++	__u32 ba_lifetime;
++	__u16 sequence;
++	__u8 flags;
++	struct mipv6_dad_cell *cell = (struct mipv6_dad_cell *) arg;
++
++	/*
++	 * If entry is not in the list, we have already sent BU Failure
++	 * after getting a NA.
++	 */
++	read_lock(&dad_lock);
++	if (dad_search_cell(cell) < 0) {
++		/*
++		 * 'cell' is no longer valid (may not be in the list or
++		 * is already processed, due to NA processing), or NS
++		 * retransmissions are not yet over.
++		 */
++		read_unlock(&dad_lock);
++		return;
++	}
++
++	/* This is the final Timeout. Send Bind Ack Success */
++
++	ifp = cell->ifp;
++	ifindex = cell->ifindex;
++	ba_lifetime = cell->ba_lifetime;
++	sequence = cell->sequence;
++	flags = cell->bu_flags;
++
++	ipv6_addr_copy(&daddr, &cell->daddr);
++	ipv6_addr_copy(&haddr, &cell->haddr);
++	ipv6_addr_copy(&coa, &cell->coa);
++	ipv6_addr_copy(&rep_coa, &cell->rep_coa);
++	read_unlock(&dad_lock);
++
++	/* Send BU Acknowledgement Success */
++	mipv6_bu_finish(ifp, ifindex, ba_status, 
++			&daddr, &haddr, &coa, &rep_coa,
++			ba_lifetime, sequence, flags, NULL);
++	return;
++}
++
++/*
++ * Check if original home address exists in our DAD pending list, if so return
++ * the cell.
++ *
++ * Assumes that the caller is holding the dad_lock in writer mode.
++ */
++static struct mipv6_dad_cell *mipv6_dad_get_cell(struct in6_addr *haddr)
++{
++	struct mipv6_dad_cell *cell;
++
++	cell = dad_cell_head.next;
++	while (cell != &dad_cell_head
++	       && ipv6_addr_cmp(&cell->haddr, haddr)) {
++		cell = cell->next;
++	}
++	if (cell == &dad_cell_head) {
++		/* Not found element */
++		return NULL;
++	}
++	return cell;
++}
++
++/*
++ * Save all parameters needed for doing a Bind Ack in the mipv6_dad_cell 
++ * structure.
++ */
++static void mipv6_dad_save_cell(struct mipv6_dad_cell *cell,
++				struct inet6_ifaddr *ifp, int ifindex,
++				struct in6_addr *daddr,
++				struct in6_addr *haddr,
++				struct in6_addr *coa, 
++				struct in6_addr *rep_coa,
++				__u32 ba_lifetime,
++				__u16 sequence, __u8 flags)
++{
++	in6_ifa_hold(ifp);
++	cell->ifp = ifp;
++	cell->ifindex = ifindex;
++
++	ipv6_addr_copy(&cell->daddr, daddr);
++	ipv6_addr_copy(&cell->haddr, haddr);
++	ipv6_addr_copy(&cell->coa, coa);
++	ipv6_addr_copy(&cell->rep_coa, rep_coa);
++
++	/* Convert cell->ll_haddr to Link Local address */
++	if (flags & MIPV6_BU_F_LLADDR) 
++		mipv6_generate_ll_addr(&cell->ll_haddr, haddr);
++	else 
++		ipv6_addr_copy(&cell->ll_haddr, haddr);
++
++	cell->ba_lifetime = ba_lifetime;
++	cell->sequence = sequence;
++	cell->bu_flags = flags;
++}
++
++/*
++ * Top level DAD routine for performing DAD.
++ *
++ * Return values
++ *	0     : Don't need to do DAD.
++ *	1     : Need to do DAD.
++ *	-n    : Error, where 'n' is the reason for the error.
++ *
++ * Assumption : DAD process has been optimized by using cached values upto
++ * some time. However sometimes this can cause problems. Eg. when the first
++ * BU was received, DAD might have failed. Before the second BU arrived,
++ * the node using MN's home address might have stopped using it, but still
++ * we will return DAD_DUPLICATE_ADDRESS based on the first DAD's result. Or 
++ * this can go the other way around. However, it is a very small possibility
++ * and thus optimization is turned on by default. It is possible to change
++ * this feature (needs a little code-rewriting in this routine), but 
++ * currently DAD result is being cached for performance reasons.
++ */
++int mipv6_dad_start(struct inet6_ifaddr *ifp, int ifindex,
++		    struct in6_addr *daddr, struct in6_addr *haddr,
++		    struct in6_addr *coa, struct in6_addr *rep_coa,
++		    __u32 ba_lifetime, __u16 sequence, __u8 flags)
++{
++	int found;
++	struct mipv6_dad_cell *cell;
++	struct mipv6_bce bc_entry;
++
++	if (ifp->idev->cnf.dad_transmits == 0) {
++		/* DAD is not configured on the HA, return SUCCESS */
++		return 0;
++	}
++
++	if (mipv6_bcache_get(haddr, daddr, &bc_entry) == 0) {
++		/*
++		 * We already have an entry in our cache - don't need to 
++		 * do DAD as we are already defending this home address.
++		 */
++		return 0;
++	}
++
++	write_lock(&dad_lock);
++	if ((cell = mipv6_dad_get_cell(haddr)) != NULL) {
++		/*
++		 * An existing entry for BU was found in our cache due
++		 * to retransmission of the BU or a new COA registration.
++		 */
++		switch (cell->flags) {
++		case DAD_INIT_ENTRY:
++			/* Old entry is waiting for DAD to complete */
++			break;
++		case DAD_UNIQUE_ADDRESS:
++			/* DAD is finished successfully - return success. */
++			write_unlock(&dad_lock);
++			return 0;
++		case DAD_DUPLICATE_ADDRESS:
++			/*
++			 * DAD is finished and we got a NA while doing BU -
++			 * return failure.
++			 */
++			write_unlock(&dad_lock);
++			return -DUPLICATE_ADDR_DETECT_FAIL;
++		default:
++			/* Unknown state - should never happen */
++			DEBUG(DBG_WARNING,
++			      "cell entry in unknown state : %d",
++			      cell->flags);
++			write_unlock(&dad_lock);
++			return -REASON_UNSPECIFIED;
++		}
++		found = 1;
++	} else {
++		if ((cell = (struct mipv6_dad_cell *)
++		     kmalloc(sizeof(struct mipv6_dad_cell), GFP_ATOMIC))
++		    == NULL) {
++			return -INSUFFICIENT_RESOURCES;
++		}
++		found = 0;
++	}
++
++	mipv6_dad_save_cell(cell, ifp, ifindex, daddr, haddr, coa, rep_coa,
++			    ba_lifetime, sequence, flags);
++
++	if (!found) {
++		cell->flags = DAD_INIT_ENTRY;
++		cell->probes = ifp->idev->cnf.dad_transmits;
++
++		/* Insert element on dad_cell_head list */
++		dad_cell_head.prev->next = cell;
++		cell->next = &dad_cell_head;
++		cell->prev = dad_cell_head.prev;
++		dad_cell_head.prev = cell;
++		write_unlock(&dad_lock);
++		if (flags & MIPV6_BU_F_LLADDR) {
++			/* join the solicited node MC of the global homeaddr.*/
++			mipv6_join_sol_mc_addr(&cell->haddr, ifp->idev->dev);
++			/* Send a NS */
++			mipv6_dad_send_ns(ifp, &cell->haddr);
++		}
++		/* join the solicited node MC of the homeaddr. */
++		mipv6_join_sol_mc_addr(&cell->ll_haddr, ifp->idev->dev);
++		
++		/* Send a NS */
++		mipv6_dad_send_ns(ifp, &cell->ll_haddr);
++		
++		/* Initialize timer for this cell to timeout the NS. */
++		init_timer(&cell->callback_timer);
++		cell->callback_timer.data = (unsigned long) cell;
++		cell->callback_timer.function = mipv6_dad_timeout;
++		cell->callback_timer.expires = jiffies +
++		    ifp->idev->nd_parms->retrans_time;
++		add_timer(&cell->callback_timer);
++	} else {
++		write_unlock(&dad_lock);
++	}
++	return 1;
++}
++
++void __init mipv6_dad_init(void)
++{
++	dad_cell_head.next = dad_cell_head.prev = &dad_cell_head;
++	init_timer(&dad_cell_head.callback_timer);
++	dad_cell_head.callback_timer.data = 0;
++	dad_cell_head.callback_timer.function =
++		mipv6_dad_delete_old_entries;
++}
++
++void __exit mipv6_dad_exit(void)
++{
++	struct mipv6_dad_cell *curr, *next;
++
++	write_lock_bh(&dad_lock);
++	del_timer(&dad_cell_head.callback_timer);
++
++	curr = dad_cell_head.next;
++	while (curr != &dad_cell_head) {
++		next = curr->next;
++		del_timer(&curr->callback_timer);
++		if (curr->flags == DAD_INIT_ENTRY) {
++			/*
++			 * We were in DAD_INIT state and listening to the
++			 * solicited node MC address - need to stop that.
++			 */
++			mipv6_leave_sol_mc_addr(&curr->ll_haddr,
++						curr->ifp->idev->dev);
++			if (ipv6_addr_cmp(&curr->ll_haddr, &curr->haddr))
++				mipv6_leave_sol_mc_addr(&curr->haddr, 
++							curr->ifp->idev->dev);
++		}
++		in6_ifa_put(curr->ifp);
++		kfree(curr);
++		curr = next;
++	}
++	dad_cell_head.next = dad_cell_head.prev = &dad_cell_head;
++	write_unlock_bh(&dad_lock);
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/prefix.c
+@@ -0,0 +1,217 @@
++/**
++ * Prefix solicitation and advertisement
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/icmpv6.h>
++#include <linux/net.h>
++#include <linux/spinlock.h>
++#include <linux/timer.h>
++#include <linux/netdevice.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "mipv6_icmp.h"
++#include "debug.h"
++#include "sortedlist.h"
++#include "prefix.h"
++#include "config.h"
++
++#define INFINITY 0xffffffff
++
++struct timer_list pfx_timer;
++
++struct list_head pfx_list;
++rwlock_t pfx_list_lock = RW_LOCK_UNLOCKED;
++
++int compare_pfx_list_entry(const void *data1, const void *data2,
++			   int datalen)
++{
++	struct pfx_list_entry *e1 = (struct pfx_list_entry *) data1;
++	struct pfx_list_entry *e2 = (struct pfx_list_entry *) data2;
++
++	return ((ipv6_addr_cmp(&e1->daddr, &e2->daddr) == 0)
++		&& (e2->ifindex == -1 || e1->ifindex == e2->ifindex));
++}
++
++/**
++ * mipv6_pfx_cancel_send - cancel pending items to daddr from saddr
++ * @daddr: Destination address
++ * @ifindex: pending items on this interface will be canceled
++ *
++ * if ifindex == -1, all items to daddr will be removed
++ */
++void mipv6_pfx_cancel_send(struct in6_addr *daddr, int ifindex)
++{
++	unsigned long tmp;
++	struct pfx_list_entry entry;
++
++	DEBUG_FUNC();
++
++	/* We'll just be comparing these parts... */
++	memcpy(&entry.daddr, daddr, sizeof(struct in6_addr));
++	entry.ifindex = ifindex;
++
++	write_lock_bh(&pfx_list_lock);
++
++	while (mipv6_slist_del_item(&pfx_list, &entry,
++				    compare_pfx_list_entry) == 0)
++		;
++
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++
++	write_unlock_bh(&pfx_list_lock);
++}
++
++/**
++ * mipv6_pfx_add_ha - add a new HA to send prefix solicitations to
++ * @daddr: address of HA
++ * @saddr: our address to use as source address
++ * @ifindex: interface index
++ */
++void mipv6_pfx_add_ha(struct in6_addr *daddr, struct in6_addr *saddr,
++		      int ifindex)
++{
++	unsigned long tmp;
++	struct pfx_list_entry entry;
++
++	DEBUG_FUNC();
++
++	memcpy(&entry.daddr, daddr, sizeof(struct in6_addr));
++	memcpy(&entry.saddr, saddr, sizeof(struct in6_addr));
++	entry.retries = 0;
++	entry.ifindex = ifindex;
++
++	write_lock_bh(&pfx_list_lock);
++	if (mipv6_slist_modify(&pfx_list, &entry, sizeof(struct pfx_list_entry),
++			       jiffies + INITIAL_SOLICIT_TIMER * HZ,
++			       compare_pfx_list_entry))
++		DEBUG(DBG_WARNING, "Cannot add new HA to pfx list");
++
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++	write_unlock_bh(&pfx_list_lock);
++}
++
++int mipv6_pfx_add_home(int ifindex, struct in6_addr *saddr, 
++		       struct in6_addr *daddr, unsigned long min_expire)
++{
++	unsigned long tmp;
++
++	write_lock(&pfx_list_lock);
++
++	if (min_expire != INFINITY) {
++		unsigned long expire;
++		struct pfx_list_entry entry;
++		
++		memcpy(&entry.daddr, saddr, sizeof(struct in6_addr));
++		memcpy(&entry.saddr, daddr, sizeof(struct in6_addr));
++		entry.retries = 0;
++		entry.ifindex = ifindex;
++
++		/* This is against the RFC 3775, but we need to set
++		 * a minimum interval for a prefix solicitation.
++		 * Otherwise a prefix solicitation storm will
++		 * result if valid lifetime of the prefix is
++		 * smaller than MAX_PFX_ADV_DELAY
++		 */
++		min_expire -= MAX_PFX_ADV_DELAY;
++		min_expire = min_expire < MIN_PFX_SOL_DELAY ? MIN_PFX_SOL_DELAY : min_expire;
++
++		expire = jiffies + min_expire * HZ;
++
++		if (mipv6_slist_modify(&pfx_list, &entry,
++				       sizeof(struct pfx_list_entry),
++				       expire,
++				       compare_pfx_list_entry) != 0)
++			DEBUG(DBG_WARNING, "Cannot add new entry to pfx_list");
++	}
++
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++
++	write_unlock(&pfx_list_lock);
++
++	return 0;
++}
++
++/**
++ * set_ha_pfx_list - manipulate pfx_list for HA when timer goes off
++ * @entry: pfx_list_entry that is due
++ */
++static void set_ha_pfx_list(struct pfx_list_entry *entry)
++{
++}
++
++/**
++ * set_mn_pfx_list - manipulate pfx_list for MN when timer goes off
++ * @entry: pfx_list_entry that is due
++ */
++static void set_mn_pfx_list(struct pfx_list_entry *entry)
++{
++}
++
++/**
++ * pfx_timer_handler - general timer handler
++ * @dummy: dummy
++ *
++ * calls set_ha_pfx_list and set_mn_pfx_list to do the thing when
++ * a timer goes off
++ */
++static void pfx_timer_handler(unsigned long dummy)
++{
++	unsigned long tmp;
++	struct pfx_list_entry *entry;
++
++	DEBUG_FUNC();
++
++	write_lock(&pfx_list_lock);
++	if (!(entry = mipv6_slist_get_first(&pfx_list)))
++		goto out;
++
++	if (mip6node_cnf.capabilities & CAP_HA)
++		set_ha_pfx_list(entry);
++	if (mip6node_cnf.capabilities & CAP_MN)
++		set_mn_pfx_list(entry);
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++
++ out:
++	write_unlock(&pfx_list_lock);
++}
++
++int mipv6_initialize_pfx_icmpv6(void)
++{
++	INIT_LIST_HEAD(&pfx_list);
++
++	init_timer(&pfx_timer);
++	pfx_timer.function = pfx_timer_handler;
++
++	return 0;
++}
++
++void mipv6_shutdown_pfx_icmpv6(void)
++{
++	struct prefix_info *tmp;
++
++	if (timer_pending(&pfx_timer))
++		del_timer(&pfx_timer);
++
++	write_lock_bh(&pfx_list_lock);
++	while ((tmp = mipv6_slist_del_first(&pfx_list)))
++		kfree(tmp);
++	write_unlock_bh(&pfx_list_lock);
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/prefix.h
+@@ -0,0 +1,57 @@
++/*
++ *      MIPL Mobile IPv6 Prefix solicitation and advertisement
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _PREFIX_H
++#define _PREFIX_H
++
++#include <net/addrconf.h>
++
++struct pfx_list_entry {
++	struct in6_addr daddr;
++	struct in6_addr saddr;
++	int retries;
++	int ifindex;
++};
++
++extern struct list_head pfx_list;
++extern rwlock_t pfx_list_lock;
++extern struct timer_list pfx_timer;
++
++int compare_pfx_list_entry(const void *data1, const void *data2,
++			   int datalen);
++
++/**
++ * mipv6_pfx_cancel_send - cancel pending pfx_advs/sols to daddr
++ * @daddr: destination address
++ * @ifindex: pending items on this interface will be canceled
++ *
++ * if ifindex == -1, all items to daddr will be removed
++ */
++void mipv6_pfx_cancel_send(struct in6_addr *daddr, int ifindex);
++
++/**
++ * mipv6_pfx_add_ha - add a new HA to send prefix solicitations to
++ * @daddr: address of HA
++ * @saddr: our address to use as source address
++ * @ifindex: interface index
++ */
++void mipv6_pfx_add_ha(struct in6_addr *daddr, struct in6_addr *saddr,
++		      int ifindex);
++
++void mipv6_pfxs_modified(struct prefix_info *pinfo, int ifindex);
++
++int mipv6_pfx_add_home(int ifindex, struct in6_addr *daddr,
++		       struct in6_addr *saddr, unsigned long min_expire);
++
++int mipv6_initialize_pfx_icmpv6(void);
++void mipv6_shutdown_pfx_icmpv6(void);
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/prefix_ha.c
+@@ -0,0 +1,122 @@
++/**
++ * Prefix advertisement for Home Agent
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/config.h>
++#include <linux/icmpv6.h>
++#include <linux/net.h>
++#include <linux/spinlock.h>
++#include <linux/timer.h>
++#include <linux/netdevice.h>
++#include <net/ipv6.h>
++#include <net/addrconf.h>
++#include <net/ip6_route.h>
++#include <net/mipv6.h>
++
++#include "mipv6_icmp.h"
++#include "debug.h"
++#include "sortedlist.h"
++#include "util.h"
++#include "bcache.h"
++#include "config.h"
++#include "prefix.h"
++
++/**
++ * pfx_adv_iterator - modify pfx_list entries according to new prefix info
++ * @data: MN's home registration bcache_entry
++ * @args: new prefix info
++ * @sortkey: ignored
++ */
++static int pfx_adv_iterator(void *data, void *args, unsigned long sortkey)
++{
++	struct mipv6_bce *bc_entry = (struct mipv6_bce *) data;
++	struct prefix_info *pinfo = (struct prefix_info *) args;
++
++	if (mipv6_prefix_compare(&bc_entry->coa, &pinfo->prefix,
++				 pinfo->prefix_len) == 0) {
++		struct pfx_list_entry pfx_entry;
++
++		memcpy(&pfx_entry.daddr, &bc_entry->coa,
++		       sizeof(struct in6_addr));
++		memcpy(&pfx_entry.daddr, &bc_entry->our_addr,
++		       sizeof(struct in6_addr));
++		pfx_entry.retries = 0;
++		pfx_entry.ifindex = bc_entry->ifindex;
++
++		mipv6_slist_modify(&pfx_list, &pfx_entry,
++				   sizeof(struct pfx_list_entry),
++				   jiffies +
++				   net_random() % (MAX_PFX_ADV_DELAY * HZ),
++				   compare_pfx_list_entry);
++	}
++
++	return 0;
++}
++
++struct homereg_iterator_args {
++	struct list_head *head;
++	int count;
++};
++
++static int homereg_iterator(void *data, void *args, unsigned long *sortkey)
++{
++	struct mipv6_bce *entry = (struct mipv6_bce *) data;
++	struct homereg_iterator_args *state =
++		(struct homereg_iterator_args *) args;
++
++	if (entry->type == HOME_REGISTRATION) {
++		mipv6_slist_add(state->head, entry,
++				sizeof(struct mipv6_bce),
++				state->count);
++		state->count++;
++	}
++	return 0;
++}
++
++static int mipv6_bcache_get_homeregs(struct list_head *head)
++{
++	struct homereg_iterator_args args;
++
++	DEBUG_FUNC();
++
++	args.count = 0;
++	args.head = head;
++
++	mipv6_bcache_iterate(homereg_iterator, &args);
++	return args.count;
++}
++
++/**
++ * mipv6_prefix_added - prefix was added to interface, act accordingly
++ * @pinfo: prefix_info that was added
++ * @ifindex: interface index
++ */
++void mipv6_pfxs_modified(struct prefix_info *pinfo, int ifindex)
++{
++	int count;
++	unsigned long tmp;
++	struct list_head home_regs;
++
++	DEBUG_FUNC();
++
++	INIT_LIST_HEAD(&home_regs);
++
++	if (!(count = mipv6_bcache_get_homeregs(&home_regs)))
++		return;
++
++	write_lock_bh(&pfx_list_lock);
++	mipv6_slist_for_each(&home_regs, pinfo, pfx_adv_iterator);
++	if ((tmp = mipv6_slist_get_first_key(&pfx_list)))
++		mod_timer(&pfx_timer, tmp);
++	write_unlock_bh(&pfx_list_lock);
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/rr_crypto.c
+@@ -0,0 +1,255 @@
++/*
++ *      rr_cookie.c - Mobile IPv6 return routability crypto  
++ *      Author :  Henrik Petander <henrik.petander@hut.fi>
++ * 
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ *
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/spinlock.h>
++#include <linux/sched.h>
++#include <linux/timer.h>
++#include <linux/in6.h>
++#include <linux/init.h>
++#include <linux/random.h>
++
++#include <net/ipv6.h>
++
++#include "debug.h"
++#include "hmac.h"
++#include "rr_crypto.h"
++
++#define DBG_RR 5
++
++u8 k_CN[HMAC_SHA1_KEY_SIZE]; // secret key of CN 
++
++u16 curr_index = 0;
++
++struct nonce_timestamp nonce_table[MAX_NONCES];
++spinlock_t nonce_lock = SPIN_LOCK_UNLOCKED;
++void update_nonces(void);
++
++/** nonce_is_fresh - whether the nonce was generated recently
++ *  
++ * @non_ts : table entry containing the nonce and a timestamp
++ * @interval : if nonce was generated within interval seconds it is fresh
++ *
++ * Returns 1 if the nonce is fresh, 0 otherwise.
++ */
++static int nonce_is_fresh(struct nonce_timestamp *non_ts, unsigned long interval)
++{
++	if (time_before(jiffies, non_ts->timestamp + interval * HZ) && !non_ts->invalid)
++		return 1;
++	return 0;
++}
++void mipv6_rr_invalidate_nonce(u16 nonce_ind)
++{
++	spin_lock_bh(&nonce_lock);
++	if (nonce_ind > MAX_NONCES) {
++		spin_unlock_bh(&nonce_lock);
++		return;
++	}
++	nonce_table[nonce_ind].invalid = 1;
++	spin_unlock_bh(&nonce_lock);
++}
++/* Returns a pointer to a new nonce  */
++struct mipv6_rr_nonce * mipv6_rr_get_new_nonce(void)
++{
++	struct mipv6_rr_nonce *nce = kmalloc(sizeof(*nce), GFP_ATOMIC);
++
++	if (!nce)
++		return NULL;
++	// Lock nonces here
++	spin_lock_bh(&nonce_lock);
++	// If nonce is not fresh create new one 
++	if (!nonce_is_fresh(&nonce_table[curr_index], MIPV6_RR_NONCE_LIFETIME)) {
++		// increment the last nonce pointer and create new nonce
++		curr_index++;
++		// Wrap around
++		if (curr_index == MAX_NONCES)
++			curr_index = 0;
++		// Get random data to fill the nonce data
++		get_random_bytes(nonce_table[curr_index].nonce.data, MIPV6_RR_NONCE_DATA_LENGTH);
++		// Fill the index field
++		nonce_table[curr_index].nonce.index = curr_index;
++		nonce_table[curr_index].invalid = 0;
++		nonce_table[curr_index].timestamp = jiffies;
++	}
++	spin_unlock_bh(&nonce_lock);
++	memcpy(nce, &nonce_table[curr_index].nonce, sizeof(*nce));
++	// Unlock nonces
++	return nce;
++}
++/** mipv6_rr_nonce_get_by_index - returns a nonce for index 
++ * @nonce_ind : index of the nonce
++ *
++ * Returns a nonce or NULL if the nonce index was invalid or the nonce 
++ * for the index was not fresh.
++ */
++struct mipv6_rr_nonce * mipv6_rr_nonce_get_by_index(u16 nonce_ind)
++{
++	struct mipv6_rr_nonce *nce = NULL;
++	
++	spin_lock_bh(&nonce_lock);
++	if (nonce_ind >= MAX_NONCES) {
++		DEBUG(DBG_WARNING, "Nonce index field from BU invalid");
++
++		/* Here a double of the nonce_lifetime is used for freshness 
++		 * verification, since the nonces 
++		 * are not created in response to every initiator packet
++		 */
++	} else if (nonce_is_fresh(&nonce_table[nonce_ind], 2 * MIPV6_RR_NONCE_LIFETIME)) {
++		nce = kmalloc(sizeof(*nce), GFP_ATOMIC);
++		memcpy(nce, &nonce_table[nonce_ind].nonce, sizeof(*nce));
++	}
++	spin_unlock_bh(&nonce_lock);
++
++	return nce;
++}
++
++/* Fills rr test init cookies with random bytes */  
++void mipv6_rr_mn_cookie_create(u8 *cookie)
++{
++	get_random_bytes(cookie, MIPV6_RR_COOKIE_LENGTH);
++}
++
++/** mipv6_rr_cookie_create - builds a home or care-of cookie
++ * 
++ * @addr : the home or care-of address from HoTI or CoTI
++ * @ckie : memory where the cookie is copied to
++ * @nce : pointer to a nonce used for the calculation, nce is freed during the function
++ *
++ */
++int mipv6_rr_cookie_create(struct in6_addr *addr, u8 **ckie,
++	       	u16 nonce_index)
++{
++	struct ah_processing ah_proc;
++	u8 digest[HMAC_SHA1_HASH_LEN];
++	struct mipv6_rr_nonce *nce;
++
++	if ((nce = mipv6_rr_nonce_get_by_index(nonce_index))== NULL)
++		return -1;
++
++	if (*ckie == NULL && (*ckie = kmalloc(MIPV6_RR_COOKIE_LENGTH,
++				       	GFP_ATOMIC)) == NULL) {
++		kfree(nce);
++		return -1;
++	}
++	/* Calculate the full hmac-sha1 digest from address and nonce using the secret key of cn */
++	
++	if (ah_hmac_sha1_init(&ah_proc, k_CN, HMAC_SHA1_KEY_SIZE) < 0) {
++		DEBUG(DBG_ERROR, "Hmac sha1 initialization failed");
++		kfree(nce);
++		return -1;
++	}
++
++	ah_hmac_sha1_loop(&ah_proc, addr, sizeof(*addr));
++	ah_hmac_sha1_loop(&ah_proc, nce->data,  MIPV6_RR_NONCE_DATA_LENGTH);
++	ah_hmac_sha1_result(&ah_proc, digest);
++
++	
++	/* clean up nonce */
++	kfree(nce);
++
++	/* Copy first 64 bits of hash target to the cookie */ 
++	memcpy(*ckie, digest, MIPV6_RR_COOKIE_LENGTH);
++	return 0;
++}
++
++/** mipv6_rr_key_calc - creates BU authentication key
++ * 
++ * @hoc : Home Cookie 
++ * @coc : Care-of Cookie 
++ * 
++ * Returns BU authentication key of length HMAC_SHA1_KEY_SIZE  or NULL in error cases, 
++ * caller needs to free the key.
++ */
++u8 *mipv6_rr_key_calc(u8 *hoc, u8 *coc)
++{
++	
++	u8 *key_bu = kmalloc(HMAC_SHA1_KEY_SIZE, GFP_ATOMIC);
++	SHA1_CTX c;
++
++	if (!key_bu) {
++		DEBUG(DBG_CRITICAL, "Memory allocation failed, could nort create BU authentication key");
++		return NULL;
++	}
++
++	/* Calculate the key from home and care-of cookies 
++	 * Kbu = sha1(home_cookie | care-of cookie) 
++	 * or KBu = sha1(home_cookie), if MN deregisters
++	 */
++	sha1_init(&c);
++	sha1_compute(&c, hoc, MIPV6_RR_COOKIE_LENGTH);
++	if (coc)
++		sha1_compute(&c, coc, MIPV6_RR_COOKIE_LENGTH);
++	sha1_final(&c, key_bu);
++	DEBUG(DBG_RR, "Home and Care-of cookies used for calculating key ");
++	debug_print_buffer(DBG_RR, hoc,  MIPV6_RR_COOKIE_LENGTH);
++	if (coc)	
++		debug_print_buffer(DBG_RR, coc,  MIPV6_RR_COOKIE_LENGTH);
++
++	return key_bu;
++}
++
++void mipv6_rr_init(void)
++{
++	get_random_bytes(k_CN, HMAC_SHA1_KEY_SIZE);
++	memset(nonce_table, 0, MAX_NONCES * sizeof(struct nonce_timestamp));
++}
++
++#ifdef TEST_MIPV6_RR_CRYPTO
++void mipv6_test_rr(void)
++{
++	struct mipv6_rr_nonce *nonce;
++	struct in6_addr a1, a2;
++	int ind1, ind2;
++	u8 *ckie1 = NULL, *ckie2 = NULL;
++	u8 *key_mn = NULL, *key_cn = NULL;
++	mipv6_init_rr();
++
++	nonce = mipv6_rr_get_new_nonce();
++	if (!nonce) {
++		printk("mipv6_rr_get_new_nonce() failed, at 1! \n");
++		return;
++	}
++	mipv6_rr_cookie_create(&a1, &ckie1, nonce->index);
++	ind1 = nonce->index;
++	kfree(nonce);
++
++	nonce = mipv6_rr_get_new_nonce();
++	if (!nonce) {
++		printk("mipv6_rr_get_new_nonce() failed, at 2! \n");
++		return;
++	}
++
++	mipv6_rr_cookie_create(&a2, &ckie2, nonce->index); 
++	ind2 = nonce->index;
++	key_mn =  mipv6_rr_key_calc(ckie1, ckie2);
++
++	/* Create home and coa cookies based on indices */
++	mipv6_rr_cookie_create(&a1, &ckie1, ind1);
++	mipv6_rr_cookie_create(&a2, &ckie2, ind2);
++	key_cn =  mipv6_rr_key_calc(ckie1, ckie2);	       
++	if (!key_cn || !key_mn) {
++		printk("creation of secret key failed!\n");
++		return;
++	}
++	if(memcmp(key_cn, key_mn, HMAC_SHA1_KEY_SIZE))
++		printk("mipv6_rr_key_calc produced different keys for MN and CN \n");
++	else
++		printk("mipv6_rr_crypto test OK\n");
++	kfree(nonce);
++	kfree(key_cn);
++	kfree(key_mn);
++}
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/rr_crypto.h
+@@ -0,0 +1,72 @@
++/*
++ *      MIPL Mobile IPv6 Return routability crypto prototypes
++ *
++ *      $Id:$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _RR_CRYPTO
++#define _RR_CRYPTO
++
++#include <linux/in6.h>
++
++/* Macros and data structures */
++
++#define MIPV6_RR_NONCE_LIFETIME 60 
++#define MIPV6_RR_NONCE_DATA_LENGTH 8
++#define MIPV6_RR_COOKIE_LENGTH 8
++#define COOKIE_SIZE 8
++#define MAX_NONCES 4
++#define HMAC_SHA1_KEY_SIZE 20
++ 
++struct mipv6_rr_nonce {
++	u_int16_t index;
++	u_int8_t data[MIPV6_RR_NONCE_DATA_LENGTH];
++};
++
++struct nonce_timestamp {
++	struct  mipv6_rr_nonce nonce;
++	unsigned long timestamp;
++	u_int8_t invalid; 
++};
++
++/* Function definitions */
++
++/* Return 1 if equal, 0 if not */
++static __inline__ int mipv6_equal_cookies(u8 *c1, u8 *c2)
++{
++	return (memcmp(c1, c2, MIPV6_RR_COOKIE_LENGTH) == 0);
++}
++
++/* Function declarations */
++
++/* Create cookie for HoTi and CoTi */
++extern void mipv6_rr_mn_cookie_create(u8 *cookie);
++
++/* Create cookie for HoT and CoT */
++extern int mipv6_rr_cookie_create(struct in6_addr *addr, u8 **ckie, u16 nonce_index);
++
++/* Calculate return routability key from home and care-of cookies, key length is 
++ *  HMAC_SHA1_KEY_SIZE  
++ */
++extern u_int8_t *mipv6_rr_key_calc(u8 *hoc, u8 *coc);
++
++extern struct mipv6_rr_nonce *mipv6_rr_get_new_nonce(void);
++
++/* For avoiding replay attacks when MN deregisters */
++extern void mipv6_rr_invalidate_nonce(u16 nonce_index);
++/*
++ * initializes the return routability crypto
++ */
++
++void mipv6_rr_init(void);
++
++#ifdef TEST_MIPV6_RR_CRYPTO
++void mipv6_test_rr(void);
++#endif /* TEST_MIPV6_RR_CRYPTO */
++
++#endif /* RR_CRYPTO */
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/sortedlist.c
+@@ -0,0 +1,349 @@
++/**
++ * Sorted list - linked list with sortkey.
++ *
++ * Authors:
++ * Jaakko Laine <medved@iki.fi>
++ *
++ * $Id$
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++#include <linux/string.h>
++
++struct mipv6_sorted_list_entry {
++	struct list_head list;
++	void *data;
++	int datalen;
++	unsigned long sortkey;
++};
++
++/**
++ * compare - compares two arbitrary data items
++ * @data1: first data item
++ * @data2: second data item
++ * @datalen: length of data items in bits
++ *
++ * datalen is in bits!
++ */
++int mipv6_bitwise_compare(const void *data1, const void *data2, int datalen)
++{
++	int n = datalen;
++	__u8 * ptr1 = (__u8 *)data1;
++	__u8 * ptr2 = (__u8 *)data2;
++	
++	for (; n>=0; n-=8, ptr1++, ptr2++) {
++		if (n >= 8) {
++			if (*ptr1 != *ptr2)
++				return 0;
++		} else {
++			if ((*ptr1 ^ *ptr2) & ((~0) << (8 - n)))
++				return 0;
++		}
++	}
++
++	return 1;
++}
++
++/**
++ * mipv6_slist_add - add an entry to sorted list
++ * @head: list_head of the sorted list
++ * @data: item to store
++ * @datalen: length of data (in bytes)
++ * @key: sortkey of item
++ *
++ * Allocates memory for entry and data
++ */
++int mipv6_slist_add(struct list_head *head, void *data, int datalen,
++		    unsigned long sortkey)
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry, *tmp, *next;
++
++	entry = kmalloc(sizeof(struct mipv6_sorted_list_entry), GFP_ATOMIC);
++
++	if (!entry)
++		return -1;
++
++	entry->data = kmalloc(datalen, GFP_ATOMIC);
++
++	if (!entry->data) {
++		kfree(entry);
++		return -1;
++	}
++
++	memcpy(entry->data, data, datalen);
++	entry->datalen = datalen;
++	entry->sortkey = sortkey;
++
++	if ((pos = head->next) == head) {
++		list_add(&entry->list, head);
++		return 0;
++	}
++
++	tmp = list_entry(pos, struct mipv6_sorted_list_entry, list);
++	if (entry->sortkey < tmp->sortkey) {
++		list_add(&entry->list, head);
++		return 0;
++	}
++
++	for (; pos != head; pos = pos->next) {
++		tmp = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (pos->next == head) {
++			list_add(&entry->list, &tmp->list);
++			return 0;
++		}
++		next = list_entry(pos->next, struct mipv6_sorted_list_entry, list);
++		if (entry->sortkey >= tmp->sortkey && entry->sortkey < next->sortkey) {
++			list_add(&entry->list, &tmp->list);
++			return 0;
++		}
++	}
++
++	/* never reached */
++	return -1;
++}
++
++/**
++ * mipv6_slist_get_first - get the first data item in the list
++ * @head: list_head of the sorted list
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_first(struct list_head *head)
++{
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return NULL;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	return entry->data;
++}
++
++/**
++ * mipv6_slist_del_first - delete (and get) the first item in list
++ * @head: list_head of the sorted list
++ *
++ * Remember to kfree the item
++ */
++void *mipv6_slist_del_first(struct list_head *head)
++{
++	void *tmp;
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return NULL;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	tmp = entry->data;
++
++	list_del(head->next);
++	kfree(entry);
++
++	return tmp;
++}
++
++/**
++ * mipv6_slist_del_item - delete entry
++ * @head: list_head of the sorted list
++ * @data: item to delete
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen)
++ */
++int mipv6_slist_del_item(struct list_head *head, void *data,
++			 int (*compare)(const void *data1, const void *data2,
++					int datalen))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	for(pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (compare(data, entry->data, entry->datalen)) {
++			list_del(pos);
++			kfree(entry->data);
++			kfree(entry);
++			return 0;
++		}
++	}
++
++	return -1;
++}
++
++/**
++ * mipv6_slist_get_first_key - get sortkey of the first item
++ * @head: list_head of the sorted list
++ */
++unsigned long mipv6_slist_get_first_key(struct list_head *head)
++{
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return 0;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	return entry->sortkey;
++}
++
++/**
++ * mipv6_slist_get_key - get sortkey of the data item
++ * @head: list_head of the sorted list
++ * @data: the item to search for
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen)
++ */
++unsigned long mipv6_slist_get_key(struct list_head *head, void *data,
++				  int (*compare)(const void *data1,
++						 const void *data2,
++						 int datalen))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++	
++	for(pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (compare(data, entry->data, entry->datalen))
++			return entry->sortkey;
++	}
++	
++	return 0;
++}
++
++/**
++ * mipv6_slist_get_data - get the data item identified by sortkey
++ * @head: list_head of the sorted list
++ * @key: sortkey of the item
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_data(struct list_head *head, unsigned long sortkey)
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	list_for_each(pos, head) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (entry->sortkey == sortkey) 
++			return entry->data;
++	}
++
++	return NULL;
++}
++
++/**
++ * reorder_entry - move an entry to a new position according to sortkey
++ * @head: list_head of the sorted list
++ * @entry_pos: current place of the entry
++ * @key: new sortkey
++ */
++static void reorder_entry(struct list_head *head, struct list_head *entry_pos,
++			  unsigned long sortkey)
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	list_del(entry_pos);
++
++	for (pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (sortkey >= entry->sortkey) {
++			list_add(entry_pos, &entry->list);
++			return;
++		}
++	}
++
++	list_add(entry_pos, head);
++}
++
++/**
++ * mipv6_slist_modify - modify data item
++ * @head: list_head of the sorted list
++ * @data: item, whose sortkey is to be modified
++ * @datalen: datalen in bytes
++ * @new_key: new sortkey
++ * @compare: function used for comparing the data items
++ *
++ * Compies the new data on top of the old one, if compare function returns
++ * true. If there's no matching entry, new one will be created.
++ * Compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen)
++ */
++int mipv6_slist_modify(struct list_head *head, void *data, int datalen,
++		       unsigned long new_key,
++		       int (*compare)(const void *data1, const void *data2,
++				      int datalen))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	for (pos = head->next; pos != head; pos = pos->next) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (compare(data, entry->data, datalen)) {
++			memcpy(entry->data, data, datalen);
++			entry->sortkey = new_key;
++			reorder_entry(head, &entry->list, new_key);
++			return 0;
++		}
++	}
++
++	return mipv6_slist_add(head, data, datalen, new_key);
++}
++
++/**
++ * mipv6_slist_push_first - move the first entry to place indicated by new_key
++ * @head: list_head of the sorted list
++ * @new_key: new sortkey
++ */
++int mipv6_slist_push_first(struct list_head *head, unsigned long new_key)
++{
++	struct mipv6_sorted_list_entry *entry;
++
++	if (list_empty(head))
++		return -1;
++
++	entry = list_entry(head->next, struct mipv6_sorted_list_entry, list);
++	entry->sortkey = new_key;
++
++	reorder_entry(head, head->next, new_key);
++	return 0;
++}
++
++/**
++ * mipv6_slist_for_each - apply func to every item in list
++ * @head: list_head of the sorted list
++ * @args: args to pass to func
++ * @func: function to use
++ *
++ * function must be of type
++ * int (*func)(void *data, void *args, unsigned long sortkey)
++ * List iteration will stop once func has been applied to every item
++ * or when func returns true
++ */
++int mipv6_slist_for_each(struct list_head *head, void *args,
++			 int (*func)(void *data, void *args,
++				     unsigned long sortkey))
++{
++	struct list_head *pos;
++	struct mipv6_sorted_list_entry *entry;
++
++	list_for_each(pos, head) {
++		entry = list_entry(pos, struct mipv6_sorted_list_entry, list);
++		if (func(entry->data, args, entry->sortkey))
++			break;
++	}
++
++	return 0;
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/sortedlist.h
+@@ -0,0 +1,133 @@
++/*
++ *      Sorted list - linked list with sortkey
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++/**
++ * compare - compares two arbitrary data items
++ * @data1: first data item
++ * @data2: second data item
++ * @datalen: length of data items in bits
++ *
++ * datalen is in bits!
++ */
++int mipv6_bitwise_compare(const void *data1, const void *data2, int datalen);
++
++/**
++ * mipv6_slist_add - add an entry to sorted list
++ * @head: list_head of the sorted list
++ * @data: item to store
++ * @datalen: length of data (in bytes)
++ * @key: sortkey of item
++ *
++ * Allocates memory for entry and data
++ */
++int mipv6_slist_add(struct list_head *head, void *data, int datalen,
++		    unsigned long sortkey);
++
++/**
++ * mipv6_slist_get_first - get the first data item in the list
++ * @head: list_head of the sorted list
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_first(struct list_head *head);
++
++/**
++ * mipv6_slist_del_first - delete (and get) the first item in list
++ * @head: list_head of the sorted list
++ *
++ * Remember to kfree the item
++ */
++void *mipv6_slist_del_first(struct list_head *head);
++
++/**
++ * mipv6_slist_del_item - delete entry
++ * @head: list_head of the sorted list
++ * @data: item to delete
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen) where
++ * datalen is in bits
++ */
++int mipv6_slist_del_item(struct list_head *head, void *data,
++			 int (*compare)(const void *data1, const void *data2,
++					int datalen));
++
++/**
++ * mipv6_slist_get_first_key - get sortkey of the first item
++ * @head: list_head of the sorted list
++ */
++unsigned long mipv6_slist_get_first_key(struct list_head *head);
++
++/**
++ * mipv6_slist_get_key - get sortkey of the data item
++ * @head: list_head of the sorted list
++ * @data: the item to search for
++ * @compare: function used for comparing the data items
++ *
++ * compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen) where
++ * datalen is in bits
++ */
++unsigned long mipv6_slist_get_key(struct list_head *head, void *data,
++				  int (*compare)(const void *data1,
++						 const void *data2,
++						 int datalen));
++
++/**
++ * mipv6_slist_get_data - get the data item identified by sortkey
++ * @head: list_head of the sorted list
++ * @key: sortkey of the item
++ *
++ * Returns the actual data item, not copy, so don't kfree it
++ */
++void *mipv6_slist_get_data(struct list_head *head, unsigned long sortkey);
++
++/**
++ * mipv6_slist_modify - modify data item
++ * @head: list_head of the sorted list
++ * @data: item, whose sortkey is to be modified
++ * @datalen: datalen in bytes
++ * @new_key: new sortkey
++ * @compare: function used for comparing the data items
++ *
++ * Compies the new data on top of the old one, if compare function returns
++ * non-negative. If there's no matching entry, new one will be created.
++ * Compare function needs to have prototype
++ * int (*compare)(const void *data1, const void *data2, int datalen) where
++ * datalen is in bits.
++ */
++int mipv6_slist_modify(struct list_head *head, void *data, int datalen,
++		       unsigned long new_key,
++		       int (*compare)(const void *data1, const void *data2,
++				      int datalen));
++
++/**
++ * mipv6_slist_push_first - move the first entry to place indicated by new_key
++ * @head: list_head of the sorted list
++ * @new_key: new sortkey
++ */
++int mipv6_slist_push_first(struct list_head *head, unsigned long new_key);
++
++/**
++ * mipv6_slist_for_each - apply func to every item in list
++ * @head: list_head of the sorted list
++ * @args: args to pass to func
++ * @func: function to use
++ *
++ * function must be of type
++ * int (*func)(void *data, void *args, unsigned long sortkey)
++ * List iteration will stop once func has been applied to every item
++ * or when func returns true
++ */
++int mipv6_slist_for_each(struct list_head *head, void *args,
++			 int (*func)(void *data, void *args,
++				     unsigned long sortkey));
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/stats.c
+@@ -0,0 +1,90 @@
++/*
++ *      Statistics module
++ *
++ *      Authors:
++ *      Sami Kivisaari          <skivisaa@cc.hut.fi>
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *     
++ *      Changes:
++ *      Krishna Kumar, 
++ *      Venkata Jagana   :  SMP locking fix  
++ */
++
++#include <linux/config.h>
++#include <linux/proc_fs.h>
++#include "stats.h"
++
++struct mipv6_statistics mipv6_stats;
++
++static int proc_info_dump(
++	char *buffer, char **start,
++	off_t offset, int length)
++{
++	struct inf {
++		char *name;
++		int *value;
++	} int_stats[] = {
++		{"NEncapsulations", &mipv6_stats.n_encapsulations},
++		{"NDecapsulations", &mipv6_stats.n_decapsulations},
++		{"NBindRefreshRqsRcvd", &mipv6_stats.n_brr_rcvd},
++		{"NHomeTestInitsRcvd", &mipv6_stats.n_hoti_rcvd},
++		{"NCareofTestInitsRcvd", &mipv6_stats.n_coti_rcvd},
++		{"NHomeTestRcvd", &mipv6_stats.n_hot_rcvd},
++		{"NCareofTestRcvd", &mipv6_stats.n_cot_rcvd},
++		{"NBindUpdatesRcvd", &mipv6_stats.n_bu_rcvd},
++		{"NBindAcksRcvd", &mipv6_stats.n_ba_rcvd},
++		{"NBindNAcksRcvd", &mipv6_stats.n_ban_rcvd},
++		{"NBindErrorsRcvd", &mipv6_stats.n_be_rcvd},
++		{"NBindRefreshRqsSent", &mipv6_stats.n_brr_sent},
++		{"NHomeTestInitsSent", &mipv6_stats.n_hoti_sent},
++		{"NCareofTestInitsSent", &mipv6_stats.n_coti_sent},
++		{"NHomeTestSent", &mipv6_stats.n_hot_sent},
++		{"NCareofTestSent", &mipv6_stats.n_cot_sent},
++		{"NBindUpdatesSent", &mipv6_stats.n_bu_sent},
++		{"NBindAcksSent", &mipv6_stats.n_ba_sent},
++		{"NBindNAcksSent", &mipv6_stats.n_ban_sent},
++		{"NBindErrorsSent", &mipv6_stats.n_be_sent},
++		{"NBindUpdatesDropAuth", &mipv6_stats.n_bu_drop.auth},
++		{"NBindUpdatesDropInvalid", &mipv6_stats.n_bu_drop.invalid},
++		{"NBindUpdatesDropMisc", &mipv6_stats.n_bu_drop.misc},
++		{"NBindAcksDropAuth", &mipv6_stats.n_bu_drop.auth},
++		{"NBindAcksDropInvalid", &mipv6_stats.n_bu_drop.invalid},
++		{"NBindAcksDropMisc", &mipv6_stats.n_bu_drop.misc},
++		{"NBindRqsDropAuth", &mipv6_stats.n_bu_drop.auth},
++		{"NBindRqsDropInvalid", &mipv6_stats.n_bu_drop.invalid},
++		{"NBindRqsDropMisc", &mipv6_stats.n_bu_drop.misc}
++	};
++
++	int i;
++	int len = 0;
++	for(i=0; i<sizeof(int_stats) / sizeof(struct inf); i++) {
++		len += sprintf(buffer + len, "%s = %d\n",
++			       int_stats[i].name, *int_stats[i].value);
++	}
++
++	*start = buffer + offset;
++
++	len -= offset;
++
++	if(len > length) len = length;
++
++	return len;
++}
++
++int mipv6_stats_init(void)
++{
++	memset(&mipv6_stats, 0, sizeof(struct mipv6_statistics));
++	proc_net_create("mip6_stat", 0, proc_info_dump);
++	return 0;
++}
++
++void mipv6_stats_exit(void)
++{
++	proc_net_remove("mip6_stat");
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/stats.h
+@@ -0,0 +1,71 @@
++/*
++ *      MIPL Mobile IPv6 Statistics header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _STATS_H
++#define _STATS_H
++
++struct mipv6_drop {
++	__u32 auth;
++	__u32 invalid;
++	__u32 misc;
++};
++
++struct mipv6_statistics {
++	int n_encapsulations;
++	int n_decapsulations;
++	int n_mh_in_msg;
++	int n_mh_in_error;
++	int n_mh_out_msg;
++	int n_mh_out_error;
++
++	int n_brr_rcvd;
++	int n_hoti_rcvd;
++	int n_coti_rcvd;
++	int n_hot_rcvd;
++	int n_cot_rcvd;
++	int n_bu_rcvd;
++	int n_ba_rcvd;
++	int n_ban_rcvd;
++	int n_be_rcvd;
++
++	int n_brr_sent;
++	int n_hoti_sent;
++	int n_coti_sent;
++	int n_hot_sent;
++	int n_cot_sent;
++	int n_bu_sent;
++	int n_ba_sent;
++	int n_ban_sent;
++	int n_be_sent;
++
++	int n_ha_rcvd;
++	int n_ha_sent;
++
++	struct mipv6_drop n_bu_drop;
++	struct mipv6_drop n_ba_drop;
++	struct mipv6_drop n_brr_drop;
++	struct mipv6_drop n_be_drop;
++	struct mipv6_drop n_ha_drop;
++};
++
++extern struct mipv6_statistics mipv6_stats;
++
++#ifdef CONFIG_SMP
++/* atomic_t is max 24 bits long */
++#define MIPV6_INC_STATS(X) atomic_inc((atomic_t *)&mipv6_stats.X);
++#else
++#define MIPV6_INC_STATS(X) mipv6_stats.X++;
++#endif
++
++int mipv6_stats_init(void);
++void mipv6_stats_exit(void);
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/tunnel.h
+@@ -0,0 +1,35 @@
++/*
++ *      MIPL Mobile IPv6 IP6-IP6 tunneling header file
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _TUNNEL_H
++#define _TUNNEL_H
++
++#include <linux/in6.h>
++#include <linux/if_arp.h>
++#include <net/ipv6_tunnel.h>
++
++static __inline__ int is_mip6_tnl(struct ip6_tnl *t)
++{
++	return (t != NULL && 
++		t->parms.flags & IP6_TNL_F_KERNEL_DEV &&
++		t->parms.flags & IP6_TNL_F_MIP6_DEV);
++			
++}
++
++static __inline__ int dev_is_mip6_tnl(struct net_device *dev)
++{
++	struct ip6_tnl *t = (struct ip6_tnl *)dev->priv;
++	return (dev->type == ARPHRD_TUNNEL6 && is_mip6_tnl(t));
++}
++
++
++#endif
++
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/tunnel_ha.c
+@@ -0,0 +1,264 @@
++/*
++ *	IPv6-IPv6 tunneling module
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *	Ville Nuorvala          <vnuorval@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/net.h>
++#include <linux/skbuff.h>
++#include <linux/ipv6.h>
++#include <linux/net.h>
++#include <linux/netdevice.h>
++#include <linux/init.h>
++#include <linux/route.h>
++#include <linux/ipv6_route.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/protocol.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/dst.h>
++#include <net/addrconf.h>
++
++#include "tunnel.h"
++#include "debug.h"
++#include "stats.h"
++#include "config.h"
++
++#define MIPV6_TNL_MAX IP6_TNL_MAX
++#define MIPV6_TNL_MIN 1
++
++int mipv6_max_tnls = 3;
++int mipv6_min_tnls = 1;
++
++DECLARE_MUTEX(tnl_sem);
++
++int mipv6_max_tnls_sysctl(ctl_table *ctl, int write, struct file *filp,
++			  void *buffer, size_t *lenp)
++{
++	int err;
++	
++	DEBUG_FUNC();
++
++	down(&tnl_sem);
++	if (write) {
++		int diff;
++		int old_max_tnls = mipv6_max_tnls;
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++		if (err < 0) 
++			goto out;
++		if (mipv6_max_tnls < mipv6_min_tnls || 
++		    mipv6_max_tnls > MIPV6_TNL_MAX) {
++			mipv6_max_tnls = old_max_tnls;
++			goto out;
++		}
++		if (mipv6_max_tnls < old_max_tnls) {
++			diff = old_max_tnls - mipv6_max_tnls;
++			ip6ip6_tnl_dec_max_kdev_count(diff);
++		} else if (mipv6_max_tnls > old_max_tnls) {
++			diff = mipv6_max_tnls - old_max_tnls;
++			ip6ip6_tnl_inc_max_kdev_count(diff);
++		}
++	} else {
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++	}
++out:
++	up(&tnl_sem);
++	return err;
++}
++
++int mipv6_min_tnls_sysctl(ctl_table *ctl, int write, struct file *filp,
++			  void *buffer, size_t *lenp)
++{
++	int err;
++
++	DEBUG_FUNC();
++
++	down(&tnl_sem);
++	if (write) {
++		int diff;
++		int old_min_tnls = mipv6_min_tnls;
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++		if (err < 0) 
++			goto out;
++		if (mipv6_min_tnls > mipv6_max_tnls || 
++		    mipv6_min_tnls < MIPV6_TNL_MIN) {
++			mipv6_min_tnls = old_min_tnls;
++			goto out;
++		}
++		if (mipv6_min_tnls < old_min_tnls) {
++			diff = old_min_tnls - mipv6_min_tnls;
++			ip6ip6_tnl_dec_min_kdev_count(diff);
++		} else if (mipv6_min_tnls > old_min_tnls) {
++			diff = mipv6_min_tnls - old_min_tnls;
++			ip6ip6_tnl_inc_min_kdev_count(diff);
++		}
++	} else {
++		err = proc_dointvec(ctl, write, filp, buffer, lenp);
++	}
++out:
++	up(&tnl_sem);
++	return err;
++}
++
++static __inline__ int mipv6_tnl_add(struct in6_addr *remote, 
++				    struct in6_addr *local) 
++{
++	struct ip6_tnl_parm p;
++	int ret;
++
++	DEBUG_FUNC();
++
++ 	memset(&p, 0, sizeof(p));
++	p.proto = IPPROTO_IPV6;
++	ipv6_addr_copy(&p.laddr, local);
++	ipv6_addr_copy(&p.raddr, remote);
++	p.hop_limit = 255;
++	p.flags = (IP6_TNL_F_KERNEL_DEV | IP6_TNL_F_MIP6_DEV |
++		   IP6_TNL_F_IGN_ENCAP_LIMIT);
++
++	ret = ip6ip6_kernel_tnl_add(&p);
++	if (ret > 0) {
++		DEBUG(DBG_INFO, "added tunnel from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x to: %x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(local), NIPV6ADDR(remote));
++	} else {
++		DEBUG(DBG_WARNING, "unable to add tunnel from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x to: %x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(local), NIPV6ADDR(remote));		
++	}
++	return ret;
++}
++
++static __inline__ int mipv6_tnl_del(struct in6_addr *remote, 
++				    struct in6_addr *local) 
++{
++	struct ip6_tnl *t = ip6ip6_tnl_lookup(remote, local);
++	
++	DEBUG_FUNC();
++	
++	if (t != NULL && (t->parms.flags & IP6_TNL_F_MIP6_DEV)) {
++		DEBUG(DBG_INFO, "deleting tunnel from: "
++		      "%x:%x:%x:%x:%x:%x:%x:%x to: %x:%x:%x:%x:%x:%x:%x:%x", 
++		      NIPV6ADDR(local), NIPV6ADDR(remote));
++
++		return ip6ip6_kernel_tnl_del(t);
++	}
++	return 0;
++}
++
++static int add_route_to_mn(struct in6_addr *coa, struct in6_addr *ha_addr, 
++			   struct in6_addr *home_addr) 
++{
++	struct in6_rtmsg rtmsg;
++	int err;
++	struct ip6_tnl *t = ip6ip6_tnl_lookup(coa, ha_addr);
++	
++	if (!is_mip6_tnl(t)) {
++		DEBUG(DBG_CRITICAL,"Tunnel missing");
++		return -ENODEV;
++	}
++	
++	DEBUG(DBG_INFO, "adding route to: %x:%x:%x:%x:%x:%x:%x:%x via "
++	      "tunnel device", NIPV6ADDR(home_addr));
++
++	memset(&rtmsg, 0, sizeof(rtmsg));
++	ipv6_addr_copy(&rtmsg.rtmsg_dst, home_addr);
++	rtmsg.rtmsg_dst_len = 128;
++	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
++	rtmsg.rtmsg_flags = RTF_UP | RTF_NONEXTHOP | RTF_HOST | RTF_MOBILENODE;
++	rtmsg.rtmsg_ifindex = t->dev->ifindex;
++	rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++	if ((err = ip6_route_add(&rtmsg, NULL)) == -EEXIST) {
++		err = 0;
++	}
++	return err;
++}
++
++static void del_route_to_mn(struct in6_addr *coa, struct in6_addr *ha_addr, 
++			    struct in6_addr *home_addr) 
++{
++	struct ip6_tnl *t = ip6ip6_tnl_lookup(coa, ha_addr);
++
++	DEBUG_FUNC();
++
++	if (is_mip6_tnl(t)) {
++		struct in6_rtmsg rtmsg;
++
++		DEBUG(DBG_INFO, "deleting route to: %x:%x:%x:%x:%x:%x:%x:%x "
++		      " via tunnel device", NIPV6ADDR(home_addr));
++
++		memset(&rtmsg, 0, sizeof(rtmsg));
++		ipv6_addr_copy(&rtmsg.rtmsg_dst, home_addr);
++		rtmsg.rtmsg_dst_len = 128;
++		rtmsg.rtmsg_ifindex = t->dev->ifindex;
++		rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++		ip6_route_del(&rtmsg, NULL);
++	}
++}
++
++
++int mipv6_add_tnl_to_mn(struct in6_addr *coa, 
++			struct in6_addr *ha_addr,
++			struct in6_addr *home_addr)
++{
++	int ret;
++
++	DEBUG_FUNC();
++
++	ret = mipv6_tnl_add(coa, ha_addr);
++
++	if (ret > 0) {
++		int err = add_route_to_mn(coa, ha_addr, home_addr);
++		if (err) {
++			if (err != -ENODEV) {
++				mipv6_tnl_del(coa, ha_addr);
++			}
++			return err;
++		}
++	}
++	return ret;
++} 
++
++int mipv6_del_tnl_to_mn(struct in6_addr *coa, 
++			struct in6_addr *ha_addr,
++			struct in6_addr *home_addr)
++{
++	DEBUG_FUNC();
++	del_route_to_mn(coa, ha_addr, home_addr);
++	return mipv6_tnl_del(coa, ha_addr);
++} 
++
++__init void mipv6_initialize_tunnel(void)
++{
++	down(&tnl_sem);
++	ip6ip6_tnl_inc_max_kdev_count(mipv6_max_tnls);
++	ip6ip6_tnl_inc_min_kdev_count(mipv6_min_tnls);
++	up(&tnl_sem);
++	mip6_fn.bce_tnl_rt_add = add_route_to_mn;
++	mip6_fn.bce_tnl_rt_del = del_route_to_mn;
++}
++
++__exit void mipv6_shutdown_tunnel(void)
++{
++	mip6_fn.bce_tnl_rt_del = NULL;
++	mip6_fn.bce_tnl_rt_add = NULL;
++	down(&tnl_sem);
++	ip6ip6_tnl_dec_min_kdev_count(mipv6_min_tnls);
++	ip6ip6_tnl_dec_max_kdev_count(mipv6_max_tnls);
++	up(&tnl_sem);
++}
++
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/tunnel_ha.h
+@@ -0,0 +1,20 @@
++#ifndef _TUNNEL_HA_H
++#define _TUNNEL_HA_H
++
++#include "tunnel.h"
++
++extern int mipv6_max_tnls;
++extern int mipv6_min_tnls;
++
++extern void mipv6_initialize_tunnel(void);
++extern void mipv6_shutdown_tunnel(void);
++
++extern int mipv6_add_tnl_to_mn(struct in6_addr *coa, 
++			       struct in6_addr *ha_addr,
++			       struct in6_addr *home_addr);
++
++extern int mipv6_del_tnl_to_mn(struct in6_addr *coa, 
++			       struct in6_addr *ha_addr,
++			       struct in6_addr *home_addr);
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/tunnel_mn.c
+@@ -0,0 +1,160 @@
++/*
++ *	IPv6-IPv6 tunneling module
++ *
++ *	Authors:
++ *	Sami Kivisaari		<skivisaa@cc.hut.fi>
++ *	Ville Nuorvala          <vnuorval@tml.hut.fi>
++ *
++ *	$Id$
++ *
++ *	This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ *
++ */
++
++#include <linux/net.h>
++#include <linux/skbuff.h>
++#include <linux/ipv6.h>
++#include <linux/net.h>
++#include <linux/netdevice.h>
++#include <linux/init.h>
++#include <linux/route.h>
++#include <linux/ipv6_route.h>
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++#endif /* CONFIG_SYSCTL */
++
++#include <net/protocol.h>
++#include <net/ipv6.h>
++#include <net/ip6_route.h>
++#include <net/dst.h>
++#include <net/addrconf.h>
++
++#include "tunnel.h"
++#include "debug.h"
++#include "stats.h"
++
++static struct net_device *mn_ha_tdev;
++
++static spinlock_t mn_ha_lock = SPIN_LOCK_UNLOCKED;
++
++static __inline__ int add_reverse_route(struct in6_addr *ha_addr,
++					struct in6_addr *home_addr, 
++					struct net_device *tdev) 
++{
++	struct in6_rtmsg rtmsg;
++	int err;
++
++	DEBUG_FUNC();
++
++	memset(&rtmsg, 0, sizeof(rtmsg));
++	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
++	ipv6_addr_copy(&rtmsg.rtmsg_src, home_addr);
++	rtmsg.rtmsg_src_len = 128;
++	rtmsg.rtmsg_flags = RTF_UP | RTF_DEFAULT;
++	rtmsg.rtmsg_ifindex = tdev->ifindex;
++	rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++	if ((err = ip6_route_add(&rtmsg, NULL)) == -EEXIST) {
++		return 0;
++	}
++	return err;	
++}
++
++static __inline__ void del_reverse_route(struct in6_addr *ha_addr, 
++					 struct in6_addr *home_addr,
++					 struct net_device *tdev) 
++{
++	struct in6_rtmsg rtmsg;
++
++	DEBUG(DBG_INFO, "removing reverse route via tunnel device");
++
++	memset(&rtmsg, 0, sizeof(rtmsg));
++	ipv6_addr_copy(&rtmsg.rtmsg_src, home_addr);
++	rtmsg.rtmsg_src_len = 128;
++	rtmsg.rtmsg_ifindex = tdev->ifindex;
++	rtmsg.rtmsg_metric = IP6_RT_PRIO_MIPV6;
++	ip6_route_del(&rtmsg, NULL);
++}
++
++int mipv6_add_tnl_to_ha(void)
++{
++	struct ip6_tnl_parm p;
++	struct ip6_tnl *t;
++	int err;
++
++	DEBUG_FUNC();
++
++ 	memset(&p, 0, sizeof(p));
++	p.proto = IPPROTO_IPV6;
++	p.hop_limit = 255;
++	p.flags = (IP6_TNL_F_KERNEL_DEV | IP6_TNL_F_MIP6_DEV |
++		   IP6_TNL_F_IGN_ENCAP_LIMIT);
++	strcpy(p.name, "mip6mnha1");
++
++	rtnl_lock();
++	if ((err = ip6ip6_tnl_create(&p, &t))) {
++		rtnl_unlock();
++		return err;
++	}
++	spin_lock_bh(&mn_ha_lock);
++
++	if (!mn_ha_tdev) {
++		mn_ha_tdev = t->dev;
++		dev_hold(mn_ha_tdev);
++	}
++	spin_unlock_bh(&mn_ha_lock);
++	dev_open(t->dev);
++	rtnl_unlock();
++	return 0;
++} 
++
++int mipv6_mv_tnl_to_ha(struct in6_addr *ha_addr,
++		       struct in6_addr *coa,
++		       struct in6_addr *home_addr)
++{
++	int err = -ENODEV;
++
++	DEBUG_FUNC();
++
++	spin_lock_bh(&mn_ha_lock);
++	if (mn_ha_tdev) {
++		struct ip6_tnl_parm p;
++		memset(&p, 0, sizeof(p));
++		p.proto = IPPROTO_IPV6;
++		ipv6_addr_copy(&p.laddr, coa);
++		ipv6_addr_copy(&p.raddr, ha_addr);
++		p.hop_limit = 255;
++		p.flags = (IP6_TNL_F_KERNEL_DEV | IP6_TNL_F_MIP6_DEV |
++			   IP6_TNL_F_IGN_ENCAP_LIMIT);
++
++		ip6ip6_tnl_change((struct ip6_tnl *) mn_ha_tdev->priv, &p);
++		if (ipv6_addr_cmp(coa, home_addr)) {
++			err = add_reverse_route(ha_addr, home_addr, 
++						mn_ha_tdev);
++		} else {
++			del_reverse_route(ha_addr, home_addr, mn_ha_tdev);
++			err = 0;
++		}
++	}
++	spin_unlock_bh(&mn_ha_lock);
++	return err;
++}
++
++void mipv6_del_tnl_to_ha(void)
++{
++	struct net_device *dev;
++
++	DEBUG_FUNC();
++
++	rtnl_lock();
++	spin_lock_bh(&mn_ha_lock);
++	dev = mn_ha_tdev;
++	mn_ha_tdev = NULL;
++	spin_unlock_bh(&mn_ha_lock);
++	dev_put(dev);
++	unregister_netdevice(dev);
++	rtnl_unlock();
++}
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/tunnel_mn.h
+@@ -0,0 +1,14 @@
++#ifndef _TUNNEL_MN_H
++#define _TUNNEL_MN_H
++
++#include "tunnel.h"
++
++extern int mipv6_add_tnl_to_ha(void);
++
++extern int mipv6_mv_tnl_to_ha(struct in6_addr *ha_addr, 
++			      struct in6_addr *coa,
++			      struct in6_addr *home_addr);
++
++extern int mipv6_del_tnl_to_ha(void);
++
++#endif
+--- /dev/null
++++ linux-2.4.27/net/ipv6/mobile_ip6/util.h
+@@ -0,0 +1,91 @@
++/*
++ *      MIPL Mobile IPv6 Utility functions
++ *
++ *      $Id$
++ *
++ *      This program is free software; you can redistribute it and/or
++ *      modify it under the terms of the GNU General Public License
++ *      as published by the Free Software Foundation; either version
++ *      2 of the License, or (at your option) any later version.
++ */
++
++#ifndef _UTIL_H
++#define _UTIL_H
++
++#include <linux/in6.h>
++#include <asm/byteorder.h>
++
++/**
++ * mipv6_prefix_compare - Compare two IPv6 prefixes
++ * @addr: IPv6 address
++ * @prefix: IPv6 address
++ * @nprefix: number of bits to compare
++ *
++ * Perform prefix comparison bitwise for the @nprefix first bits
++ * Returns 1, if the prefixes are the same, 0 otherwise 
++ **/
++static inline int mipv6_prefix_compare(const struct in6_addr *addr,
++				       const struct in6_addr *prefix, 
++				       const unsigned int pfix_len)
++{
++	int i;
++	unsigned int nprefix = pfix_len;
++
++	if (nprefix > 128)
++		return 0;
++
++	for (i = 0; nprefix > 0; nprefix -= 32, i++) {
++		if (nprefix >= 32) {
++			if (addr->s6_addr32[i] != prefix->s6_addr32[i])
++				return 0;
++		} else {
++			if (((addr->s6_addr32[i] ^ prefix->s6_addr32[i]) &
++			     ((~0) << (32 - nprefix))) != 0)
++				return 0;
++			return 1;
++		}
++	}
++
++	return 1;
++}
++
++/**
++ * homeagent_anycast - Compute Home Agent anycast address
++ * @ac_addr: append home agent anycast suffix to passed prefix
++ * @prefix: prefix ha anycast address is generated from
++ * @plen: length of prefix in bits
++ *
++ * Calculate corresponding Home Agent Anycast Address (RFC2526) in a
++ * given subnet.
++ */
++static inline int 
++mipv6_ha_anycast(struct in6_addr *ac_addr, struct in6_addr *prefix, int plen)
++{
++	if (plen <= 0 || plen > 120)  {
++		/* error, interface id should be minimum 8 bits */
++		return -1;
++	}
++	ipv6_addr_copy(ac_addr, prefix);
++
++	if (plen < 32)
++		ac_addr->s6_addr32[0] |= htonl((u32)(~0) >> plen);
++	if (plen < 64)
++		ac_addr->s6_addr32[1] |= htonl((u32)(~0) >> (plen > 32 ? plen % 32 : 0));
++	if (plen < 92)
++		ac_addr->s6_addr32[2] |= htonl((u32)(~0) >> (plen > 64 ? plen % 32 : 0));
++	if (plen <= 120)
++		ac_addr->s6_addr32[3] |= htonl((u32)(~0) >> (plen > 92 ? plen % 32 : 0));
++
++	/* RFC2526: for interface identifiers in EUI-64
++	 * format, the universal/local bit in the interface
++	 * identifier MUST be set to 0. */
++	if (plen == 64) {
++		ac_addr->s6_addr32[2] &= (int)htonl(0xfdffffff);
++	}
++	/* Mobile IPv6 Home-Agents anycast id (0x7e) */
++	ac_addr->s6_addr32[3] &= (int)htonl(0xfffffffe);
++
++	return 0;
++}
++
++#endif /* _UTIL_H */
+--- linux-2.4.27/net/ipv6/ndisc.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/ndisc.c
+@@ -23,6 +23,7 @@
+  *						and moved to net/core.
+  *	Pekka Savola			:	RFC2461 validation
+  *	YOSHIFUJI Hideaki @USAGI	:	Verify ND options properly
++ *	Ville Nuorvala			:	RFC2461 fixes to proxy ND
+  */
+ 
+ /* Set to 3 to get tracing... */
+@@ -70,6 +71,7 @@
+ #include <net/ip6_route.h>
+ #include <net/addrconf.h>
+ #include <net/icmp.h>
++#include <net/mipglue.h>
+ 
+ #include <net/checksum.h>
+ #include <linux/proc_fs.h>
+@@ -187,6 +189,8 @@
+ 		case ND_OPT_TARGET_LL_ADDR:
+ 		case ND_OPT_MTU:
+ 		case ND_OPT_REDIRECT_HDR:
++		case ND_OPT_RTR_ADV_INTERVAL:
++		case ND_OPT_HOME_AGENT_INFO:
+ 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
+ 				ND_PRINTK2((KERN_WARNING
+ 					    "ndisc_parse_options(): duplicated ND6 option found: type=%d\n",
+@@ -372,8 +376,8 @@
+  */
+ 
+ void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
+-		   struct in6_addr *daddr, struct in6_addr *solicited_addr,
+-		   int router, int solicited, int override, int inc_opt) 
++		struct in6_addr *daddr, struct in6_addr *solicited_addr, 
++		int router, int solicited, int override, int inc_opt) 
+ {
+ 	static struct in6_addr tmpaddr;
+ 	struct inet6_ifaddr *ifp;
+@@ -766,7 +770,8 @@
+ 		int addr_type = ipv6_addr_type(saddr);
+ 
+ 		if (in6_dev && in6_dev->cnf.forwarding &&
+-		    (addr_type & IPV6_ADDR_UNICAST) &&
++		    (addr_type & IPV6_ADDR_UNICAST || 
++		     addr_type == IPV6_ADDR_ANY) &&
+ 		    pneigh_lookup(&nd_tbl, &msg->target, dev, 0)) {
+ 			int inc = ipv6_addr_type(daddr)&IPV6_ADDR_MULTICAST;
+ 
+@@ -778,13 +783,21 @@
+ 					nd_tbl.stats.rcv_probes_mcast++;
+ 				else
+ 					nd_tbl.stats.rcv_probes_ucast++;
+-					
+-				neigh = neigh_event_ns(&nd_tbl, lladdr, saddr, dev);
+ 
+-				if (neigh) {
+-					ndisc_send_na(dev, neigh, saddr, &msg->target,
+-						      0, 1, 0, 1);
+-					neigh_release(neigh);
++				if (addr_type & IPV6_ADDR_UNICAST) {		
++					neigh = neigh_event_ns(&nd_tbl, lladdr, saddr, dev);
++
++					if (neigh) {
++						ndisc_send_na(dev, neigh, saddr, &msg->target,
++						      	      0, 1, 0, 1);
++						neigh_release(neigh);
++					}
++				} else {
++					/* the proxy should also protect against DAD */
++					struct in6_addr maddr;
++					ipv6_addr_all_nodes(&maddr);
++					ndisc_send_na(dev, NULL, &maddr, &msg->target,
++						      0, 0, 0, 1);
+ 				}
+ 			} else {
+ 				struct sk_buff *n = skb_clone(skb, GFP_ATOMIC);
+@@ -849,6 +862,9 @@
+ 		if (ifp->flags & IFA_F_TENTATIVE) {
+ 			addrconf_dad_failure(ifp);
+ 			return;
++		} else if (ndisc_mip_mn_ha_probe(ifp, lladdr)) {
++			in6_ifa_put(ifp);
++			return;
+ 		}
+ 		/* What should we make now? The advertisement
+ 		   is invalid, but ndisc specs say nothing
+@@ -887,6 +903,7 @@
+ 			     msg->icmph.icmp6_override, 1);
+ 		neigh_release(neigh);
+ 	}
++	ndisc_check_mipv6_dad(&msg->target);
+ }
+ 
+ static void ndisc_router_discovery(struct sk_buff *skb)
+@@ -894,6 +911,7 @@
+         struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
+ 	struct neighbour *neigh;
+ 	struct inet6_dev *in6_dev;
++	int change_rtr;
+ 	struct rt6_info *rt;
+ 	int lifetime;
+ 	struct ndisc_options ndopts;
+@@ -923,10 +941,6 @@
+ 		ND_PRINTK1("RA: can't find in6 device\n");
+ 		return;
+ 	}
+-	if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_ra) {
+-		in6_dev_put(in6_dev);
+-		return;
+-	}
+ 
+ 	if (!ndisc_parse_options(opt, optlen, &ndopts)) {
+ 		in6_dev_put(in6_dev);
+@@ -935,7 +949,12 @@
+ 				   "ICMP6 RA: invalid ND option, ignored.\n");
+ 		return;
+ 	}
++	change_rtr = ndisc_mipv6_ra_rcv(skb, &ndopts);
+ 
++	if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_ra) {
++		in6_dev_put(in6_dev);
++		return;
++	}
+ 	if (in6_dev->if_flags & IF_RS_SENT) {
+ 		/*
+ 		 *	flag that an RA was received after an RS was sent
+@@ -963,8 +982,7 @@
+ 		ip6_del_rt(rt, NULL);
+ 		rt = NULL;
+ 	}
+-
+-	if (rt == NULL && lifetime) {
++	if (rt == NULL && lifetime && change_rtr) {
+ 		ND_PRINTK2("ndisc_rdisc: adding default router\n");
+ 
+ 		rt = rt6_add_dflt_router(&skb->nh.ipv6h->saddr, skb->dev);
+@@ -1087,6 +1105,8 @@
+ 	if (rt)
+ 		dst_release(&rt->u.dst);
+ 	in6_dev_put(in6_dev);
++
++	ndisc_mipv6_change_router(change_rtr);
+ }
+ 
+ static void ndisc_redirect_rcv(struct sk_buff *skb)
+--- linux-2.4.27/net/ipv6/raw.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/raw.c
+@@ -43,6 +43,7 @@
+ #include <net/transp_v6.h>
+ #include <net/udp.h>
+ #include <net/inet_common.h>
++#include <net/mipglue.h>
+ 
+ #include <net/rawv6.h>
+ 
+@@ -641,6 +642,7 @@
+ 			hdr.daddr = daddr;
+ 		else
+ 			hdr.daddr = NULL;
++		hdr.daddr = mipv6_get_fake_hdr_daddr(hdr.daddr, daddr);
+ 
+ 		err = ip6_build_xmit(sk, rawv6_frag_cksum, &hdr, &fl, len,
+ 				     opt, hlimit, msg->msg_flags);
+--- linux-2.4.27/net/ipv6/route.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/route.c
+@@ -49,6 +49,7 @@
+ #include <net/addrconf.h>
+ #include <net/tcp.h>
+ #include <linux/rtnetlink.h>
++#include <net/mipglue.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -363,12 +364,8 @@
+ 		rt->u.dst.flags |= DST_HOST;
+ 
+ #ifdef CONFIG_IPV6_SUBTREES
+-		if (rt->rt6i_src.plen && saddr) {
+-			ipv6_addr_copy(&rt->rt6i_src.addr, saddr);
+-			rt->rt6i_src.plen = 128;
+-		}
++		rt->rt6i_src.plen = ort->rt6i_src.plen;
+ #endif
+-
+ 		rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+ 
+ 		dst_hold(&rt->u.dst);
+@@ -511,14 +508,19 @@
+ 	struct rt6_info *rt;
+ 	int strict;
+ 	int attempts = 3;
++	struct in6_addr *saddr;
+ 
++	if (ipv6_chk_addr(fl->nl_u.ip6_u.daddr, NULL))
++		saddr = NULL;
++	else
++		saddr = fl->nl_u.ip6_u.saddr;
++		
+ 	strict = ipv6_addr_type(fl->nl_u.ip6_u.daddr) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL);
+ 
+ relookup:
+ 	read_lock_bh(&rt6_lock);
+ 
+-	fn = fib6_lookup(&ip6_routing_table, fl->nl_u.ip6_u.daddr,
+-			 fl->nl_u.ip6_u.saddr);
++	fn = fib6_lookup(&ip6_routing_table, fl->nl_u.ip6_u.daddr, saddr);
+ 
+ restart:
+ 	rt = fn->leaf;
+@@ -663,25 +665,6 @@
+ 	return (atomic_read(&ip6_dst_ops.entries) > ip6_rt_max_size);
+ }
+ 
+-/* Clean host part of a prefix. Not necessary in radix tree,
+-   but results in cleaner routing tables.
+-
+-   Remove it only when all the things will work!
+- */
+-
+-static void ipv6_addr_prefix(struct in6_addr *pfx,
+-			     const struct in6_addr *addr, int plen)
+-{
+-	int b = plen&0x7;
+-	int o = plen>>3;
+-
+-	memcpy(pfx->s6_addr, addr, o);
+-	if (o < 16)
+-		memset(pfx->s6_addr + o, 0, 16 - o);
+-	if (b != 0)
+-		pfx->s6_addr[o] = addr->s6_addr[o]&(0xff00 >> b);
+-}
+-
+ static int ipv6_get_mtu(struct net_device *dev)
+ {
+ 	int mtu = IPV6_MIN_MTU;
+@@ -810,7 +793,7 @@
+ 			if (!(gwa_type&IPV6_ADDR_UNICAST))
+ 				goto out;
+ 
+-			grt = rt6_lookup(gw_addr, NULL, rtmsg->rtmsg_ifindex, 1);
++			grt = rt6_lookup(gw_addr, &rtmsg->rtmsg_src, rtmsg->rtmsg_ifindex, 1);
+ 
+ 			err = -EHOSTUNREACH;
+ 			if (grt == NULL)
+@@ -848,7 +831,15 @@
+ 			goto out;
+ 		}
+ 	}
+-
++#ifdef USE_IPV6_MOBILITY
++        /* If destination is mobile node, add special skb->dst->input
++         * function for proxy ND.
++         */
++        if (rtmsg->rtmsg_flags & RTF_MOBILENODE) {
++                rt->u.dst.input = ip6_mipv6_forward;
++        }
++#endif /* CONFIG_IPV6_MOBILITY */
++	  
+ 	if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr))
+ 		rt->rt6i_hoplimit = IPV6_DEFAULT_MCASTHOPS;
+ 	else
+@@ -936,7 +927,7 @@
+ 	struct rt6_info *rt, *nrt;
+ 
+ 	/* Locate old route to this destination. */
+-	rt = rt6_lookup(dest, NULL, neigh->dev->ifindex, 1);
++	rt = rt6_lookup(dest, saddr, neigh->dev->ifindex, 1);
+ 
+ 	if (rt == NULL)
+ 		return;
+@@ -1003,6 +994,9 @@
+ 	nrt = ip6_rt_copy(rt);
+ 	if (nrt == NULL)
+ 		goto out;
++#ifdef CONFIG_IPV6_SUBTREES
++	nrt->rt6i_src.plen = rt->rt6i_src.plen;
++#endif
+ 
+ 	nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE;
+ 	if (on_link)
+@@ -1104,6 +1098,9 @@
+ 		nrt = ip6_rt_copy(rt);
+ 		if (nrt == NULL)
+ 			goto out;
++#ifdef CONFIG_IPV6_SUBTREES
++		nrt->rt6i_src.plen = rt->rt6i_src.plen;
++#endif
+ 		ipv6_addr_copy(&nrt->rt6i_dst.addr, daddr);
+ 		nrt->rt6i_dst.plen = 128;
+ 		nrt->u.dst.flags |= DST_HOST;
+--- linux-2.4.27/net/ipv6/tcp_ipv6.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/tcp_ipv6.c
+@@ -50,6 +50,7 @@
+ #include <net/addrconf.h>
+ #include <net/ip6_route.h>
+ #include <net/inet_ecn.h>
++#include <net/mipglue.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -557,6 +558,7 @@
+ 	struct flowi fl;
+ 	struct dst_entry *dst;
+ 	int addr_type;
++	int reroute = 0;
+ 	int err;
+ 
+ 	if (addr_len < SIN6_LEN_RFC2133) 
+@@ -660,7 +662,7 @@
+ 
+ 	fl.proto = IPPROTO_TCP;
+ 	fl.fl6_dst = &np->daddr;
+-	fl.fl6_src = saddr;
++	fl.fl6_src = saddr; 
+ 	fl.oif = sk->bound_dev_if;
+ 	fl.uli_u.ports.dport = usin->sin6_port;
+ 	fl.uli_u.ports.sport = sk->sport;
+@@ -669,31 +671,46 @@
+ 		struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
+ 		fl.nl_u.ip6_u.daddr = rt0->addr;
+ 	}
+-
+ 	dst = ip6_route_output(sk, &fl);
+-
++#ifdef CONFIG_IPV6_SUBTREES
++	reroute = (saddr == NULL);
++#endif
+ 	if ((err = dst->error) != 0) {
+ 		dst_release(dst);
+ 		goto failure;
+ 	}
+-
+-	ip6_dst_store(sk, dst, NULL);
+-	sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
+-
++	if (!reroute) {
++		ip6_dst_store(sk, dst, NULL, NULL);
++		sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
++	}
+ 	if (saddr == NULL) {
+ 		err = ipv6_get_saddr(dst, &np->daddr, &saddr_buf);
++
++		if (reroute)
++			dst_release(dst);
+ 		if (err)
+ 			goto failure;
+ 
+ 		saddr = &saddr_buf;
++		ipv6_addr_copy(&np->rcv_saddr, saddr);
++#ifdef CONFIG_IPV6_SUBTREES
++		fl.fl6_src = saddr; 
++		dst = ip6_route_output(sk, &fl);
++
++		if ((err = dst->error) != 0) {
++			dst_release(dst);
++			goto failure;
++		}
++		ip6_dst_store(sk, dst, NULL, NULL);
++		sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
++#endif
+ 	}
+ 
+ 	/* set the source address */
+-	ipv6_addr_copy(&np->rcv_saddr, saddr);
+ 	ipv6_addr_copy(&np->saddr, saddr);
+ 	sk->rcv_saddr= LOOPBACK4_IPV6;
+ 
+-	tp->ext_header_len = 0;
++	tp->ext_header_len = tcp_v6_get_mipv6_header_len();
+ 	if (np->opt)
+ 		tp->ext_header_len = np->opt->opt_flen+np->opt->opt_nflen;
+ 	tp->mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr);
+@@ -1338,7 +1355,7 @@
+ #endif
+ 	MOD_INC_USE_COUNT;
+ 
+-	ip6_dst_store(newsk, dst, NULL);
++	ip6_dst_store(newsk, dst, NULL, NULL);
+ 	sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
+ 
+ 	newtp = &(newsk->tp_pinfo.af_tcp);
+@@ -1383,7 +1400,7 @@
+ 			sock_kfree_s(sk, opt, opt->tot_len);
+ 	}
+ 
+-	newtp->ext_header_len = 0;
++	newtp->ext_header_len = tcp_v6_get_mipv6_header_len();
+ 	if (np->opt)
+ 		newtp->ext_header_len = np->opt->opt_nflen + np->opt->opt_flen;
+ 
+@@ -1710,7 +1727,7 @@
+ 			return err;
+ 		}
+ 
+-		ip6_dst_store(sk, dst, NULL);
++		ip6_dst_store(sk, dst, NULL, NULL);
+ 		sk->route_caps = dst->dev->features&~NETIF_F_IP_CSUM;
+ 	}
+ 
+@@ -1749,7 +1766,7 @@
+ 			return -sk->err_soft;
+ 		}
+ 
+-		ip6_dst_store(sk, dst, NULL);
++		ip6_dst_store(sk, dst, NULL, NULL);
+ 	}
+ 
+ 	skb->dst = dst_clone(dst);
+--- linux-2.4.27/net/ipv6/udp.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/ipv6/udp.c
+@@ -48,6 +48,7 @@
+ #include <net/ip.h>
+ #include <net/udp.h>
+ #include <net/inet_common.h>
++#include <net/mipglue.h>
+ 
+ #include <net/checksum.h>
+ 
+@@ -232,6 +233,7 @@
+ 	struct ip6_flowlabel	*flowlabel = NULL;
+ 	int			addr_type;
+ 	int			err;
++	int			reroute = 0;
+ 
+ 	if (usin->sin6_family == AF_INET) {
+ 		if (__ipv6_only_sock(sk))
+@@ -331,7 +333,7 @@
+ 
+ 	fl.proto = IPPROTO_UDP;
+ 	fl.fl6_dst = &np->daddr;
+-	fl.fl6_src = &saddr;
++	fl.fl6_src = NULL;
+ 	fl.oif = sk->bound_dev_if;
+ 	fl.uli_u.ports.dport = sk->dport;
+ 	fl.uli_u.ports.sport = sk->sport;
+@@ -348,29 +350,44 @@
+ 		struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
+ 		fl.fl6_dst = rt0->addr;
+ 	}
+-
+ 	dst = ip6_route_output(sk, &fl);
+-
+ 	if ((err = dst->error) != 0) {
+ 		dst_release(dst);
+ 		fl6_sock_release(flowlabel);
+-		return err;
+-	}
+-
+-	ip6_dst_store(sk, dst, fl.fl6_dst);
+-
++		return err; 
++	} 
++#ifdef CONFIG_IPV6_SUBTREES
++	reroute = (fl.fl6_src == NULL);
++#endif
+ 	/* get the source adddress used in the apropriate device */
+ 
+ 	err = ipv6_get_saddr(dst, daddr, &saddr);
+ 
++	if (reroute)
++		dst_release(dst);
++
+ 	if (err == 0) {
+-		if(ipv6_addr_any(&np->saddr))
++#ifdef CONFIG_IPV6_SUBTREES
++		if (reroute) {
++			fl.fl6_src = &saddr;
++			dst = ip6_route_output(sk, &fl);
++			if ((err = dst->error) != 0) {
++				dst_release(dst);
++				fl6_sock_release(flowlabel);
++				return err; 
++			} 
++		}
++#endif
++		if(ipv6_addr_any(&np->saddr)) {
+ 			ipv6_addr_copy(&np->saddr, &saddr);
+-
++			fl.fl6_src = &np->saddr;
++		}
+ 		if(ipv6_addr_any(&np->rcv_saddr)) {
+ 			ipv6_addr_copy(&np->rcv_saddr, &saddr);
+ 			sk->rcv_saddr = LOOPBACK4_IPV6;
+ 		}
++		ip6_dst_store(sk, dst, fl.fl6_dst, 
++			      fl.fl6_src == &np->saddr ? fl.fl6_src : NULL);
+ 		sk->state = TCP_ESTABLISHED;
+ 	}
+ 	fl6_sock_release(flowlabel);
+@@ -889,6 +906,7 @@
+ 		opt = fl6_merge_options(&opt_space, flowlabel, opt);
+ 	if (opt && opt->srcrt)
+ 		udh.daddr = daddr;
++	udh.daddr = mipv6_get_fake_hdr_daddr(udh.daddr, daddr);
+ 
+ 	udh.uh.source = sk->sport;
+ 	udh.uh.len = len < 0x10000 ? htons(len) : 0;
+--- linux-2.4.27/net/netsyms.c~mipv6-1.1-v2.4.26
++++ linux-2.4.27/net/netsyms.c
+@@ -190,6 +190,7 @@
+ #endif
+ EXPORT_SYMBOL(pneigh_lookup);
+ EXPORT_SYMBOL(pneigh_enqueue);
++EXPORT_SYMBOL(pneigh_delete);
+ EXPORT_SYMBOL(neigh_destroy);
+ EXPORT_SYMBOL(neigh_parms_alloc);
+ EXPORT_SYMBOL(neigh_parms_release);
diff --git a/recipes/linux/files/usb-gadget-ether-compat.patch b/recipes/linux/files/usb-gadget-ether-compat.patch
new file mode 100644
index 0000000000..9e336cfa3c
--- /dev/null
+++ b/recipes/linux/files/usb-gadget-ether-compat.patch
@@ -0,0 +1,30 @@
+--- kernel/drivers/usb/gadget/ether.c	2005-04-24 12:40:08.867411535 +0200
++++ /tmp/ether.c	2005-04-24 12:39:02.119093498 +0200
+@@ -231,6 +231,16 @@
+ MODULE_PARM(host_addr, "s");
+ MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
+ 
++#ifdef CONFIG_USB_ETH_RNDIS
++/* setting it to 1 disables the RNDIS extension,
++ *	needed to make g_ether compatible with usbnet from kernel < 2.6.10:
++ * - simple vendor/product
++ *	- just the CDC interface
++ */
++static u8 __initdata compat_mode;
++MODULE_PARM(compat_mode, "b");
++MODULE_PARM_DESC(compat_mode, "non-zero value reverts to traditional usbnet compatibility (RNDIS disabled)");
++#endif
+ 
+ /*-------------------------------------------------------------------------*/
+ 
+@@ -2336,6 +2346,10 @@
+ #endif
+ #ifndef	CONFIG_USB_ETH_RNDIS
+ 	rndis = 0;
++#else
++	if (compat_mode) {
++		rndis = 0;
++	}
+ #endif
+ 
+ 	/* Because most host side USB stacks handle CDC Ethernet, that
author	Denys Dmytriyenko <denis@denix.org>	2009-03-17 14:32:59 -0400
committer	Denys Dmytriyenko <denis@denix.org>	2009-03-17 14:32:59 -0400
commit	709c4d66e0b107ca606941b988bad717c0b45d9b (patch)
tree	37ee08b1eb308f3b2b6426d5793545c38396b838 /recipes/linux/files
parent	fa6cd5a3b993f16c27de4ff82b42684516d433ba (diff)