merge of '76e1e69496801009ea0aa69c84f76e858978ab99'

     and 'db976a98427dd6a195e2cf167e225de2d0206aea'

1 files changed, 2051 insertions, 0 deletions

diff --git a/packages/linux/linux-magicbox-2.6.18.6/kernel-2.6.18-layer7-2.6.patch b/packages/linux/linux-magicbox-2.6.18.6/kernel-2.6.18-layer7-2.6.patch
new file mode 100644
index 0000000000..63e36d7a5c
--- /dev/null
+++ b/packages/linux/linux-magicbox-2.6.18.6/kernel-2.6.18-layer7-2.6.patch
@@ -0,0 +1,2051 @@
+--- linux-2.6.18/include/linux/netfilter_ipv4/ip_conntrack.h	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/include/linux/netfilter_ipv4/ip_conntrack.h	2006-09-24 10:17:45.000000000 -0500
+@@ -127,6 +127,15 @@ struct ip_conntrack
+ 	/* Traversed often, so hopefully in different cacheline to top */
+ 	/* These are my tuples; original and reply */
+ 	struct ip_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];
++
++#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++        struct {
++                char * app_proto; /* e.g. "http". NULL before decision. "unknown" after decision if no match */
++                char * app_data;  /* application layer data so far.  NULL after match decision */
++                unsigned int app_data_len;
++        } layer7;
++#endif
++
+ };
+ 
+ struct ip_conntrack_expect
+--- linux-2.6.18/include/linux/netfilter_ipv4/ipt_layer7.h	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.6.18-layer7/include/linux/netfilter_ipv4/ipt_layer7.h	2006-09-24 10:17:45.000000000 -0500
+@@ -0,0 +1,26 @@
++/*
++  By Matthew Strait <quadong@users.sf.net>, Dec 2003.
++  http://l7-filter.sf.net
++
++  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.
++  http://www.gnu.org/licenses/gpl.txt
++*/
++
++#ifndef _IPT_LAYER7_H
++#define _IPT_LAYER7_H
++
++#define MAX_PATTERN_LEN 8192
++#define MAX_PROTOCOL_LEN 256
++
++typedef char *(*proc_ipt_search) (char *, char, char *);
++
++struct ipt_layer7_info {
++    char protocol[MAX_PROTOCOL_LEN];
++    char invert:1;
++    char pattern[MAX_PATTERN_LEN];
++};
++
++#endif /* _IPT_LAYER7_H */
+--- linux-2.6.18/net/ipv4/netfilter/Kconfig	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/Kconfig	2006-09-24 10:17:45.000000000 -0500
+@@ -248,6 +248,24 @@ config IP_NF_MATCH_IPRANGE
+ 
+ 	  To compile it as a module, choose M here.  If unsure, say N.
+ 
++config IP_NF_MATCH_LAYER7
++	tristate "Layer 7 match support (EXPERIMENTAL)"
++	depends on IP_NF_IPTABLES && IP_NF_CT_ACCT && IP_NF_CONNTRACK && EXPERIMENTAL
++	help
++	  Say Y if you want to be able to classify connections (and their
++	  packets) based on regular expression matching of their application
++	  layer data.   This is one way to classify applications such as
++	  peer-to-peer filesharing systems that do not always use the same
++	  port.
++
++	  To compile it as a module, choose M here.  If unsure, say N.
++
++config IP_NF_MATCH_LAYER7_DEBUG
++	bool "Layer 7 debugging output"
++	depends on IP_NF_MATCH_LAYER7
++	help
++	  Say Y to get lots of debugging output.
++
+ config IP_NF_MATCH_TOS
+ 	tristate "TOS match support"
+ 	depends on IP_NF_IPTABLES
+--- linux-2.6.18/net/ipv4/netfilter/Makefile	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/Makefile	2006-09-24 10:17:45.000000000 -0500
+@@ -64,6 +64,8 @@ obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
+ obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
+ obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
+ 
++obj-$(CONFIG_IP_NF_MATCH_LAYER7) += ipt_layer7.o
++
+ # targets
+ obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
+ obj-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS.o
+--- linux-2.6.18/net/ipv4/netfilter/ip_conntrack_core.c	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/ip_conntrack_core.c	2006-09-24 10:17:45.000000000 -0500
+@@ -338,6 +338,13 @@ destroy_conntrack(struct nf_conntrack *n
+ 	 * too. */
+ 	ip_ct_remove_expectations(ct);
+ 
++	#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++	if(ct->layer7.app_proto)
++		kfree(ct->layer7.app_proto);
++	if(ct->layer7.app_data)
++		kfree(ct->layer7.app_data);
++	#endif
++
+ 	/* We overload first tuple to link into unconfirmed list. */
+ 	if (!is_confirmed(ct)) {
+ 		BUG_ON(list_empty(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list));
+--- linux-2.6.18/net/ipv4/netfilter/ip_conntrack_standalone.c	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/ip_conntrack_standalone.c	2006-09-24 10:17:45.000000000 -0500
+@@ -193,6 +193,12 @@ static int ct_seq_show(struct seq_file *
+ 		return -ENOSPC;
+ #endif
+ 
++#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++	if(conntrack->layer7.app_proto)
++		if (seq_printf(s, "l7proto=%s ",conntrack->layer7.app_proto))
++			return 1;
++#endif
++
+ 	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
+ 		return -ENOSPC;
+ 
+--- linux-2.6.18/net/ipv4/netfilter/ipt_layer7.c	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.6.18-layer7/net/ipv4/netfilter/ipt_layer7.c	2006-09-24 10:59:55.000000000 -0500
+@@ -0,0 +1,582 @@
++/*
++  Kernel module to match application layer (OSI layer 7)
++  data in connections.
++
++  http://l7-filter.sf.net
++
++  By Matthew Strait and Ethan Sommer, 2003-2005.
++
++  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.
++  http://www.gnu.org/licenses/gpl.txt
++
++  Based on ipt_string.c (C) 2000 Emmanuel Roger <winfield@freegates.be>
++  and cls_layer7.c (C) 2003 Matthew Strait, Ethan Sommer, Justin Levandoski
++*/
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_conntrack.h>
++#include <linux/proc_fs.h>
++#include <linux/ctype.h>
++#include <net/ip.h>
++#include <net/tcp.h>
++#include <linux/spinlock.h>
++
++#include "regexp/regexp.c"
++
++#include <linux/netfilter_ipv4/ipt_layer7.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++
++MODULE_AUTHOR("Matthew Strait <quadong@users.sf.net>, Ethan Sommer <sommere@users.sf.net>");
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("iptables application layer match module");
++MODULE_VERSION("2.0");
++
++static int maxdatalen = 2048; // this is the default
++module_param(maxdatalen, int, 0444);
++MODULE_PARM_DESC(maxdatalen, "maximum bytes of data looked at by l7-filter");
++
++#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++	#define DPRINTK(format,args...) printk(format,##args)
++#else
++	#define DPRINTK(format,args...)
++#endif
++
++#define TOTAL_PACKETS master_conntrack->counters[IP_CT_DIR_ORIGINAL].packets + \
++		      master_conntrack->counters[IP_CT_DIR_REPLY].packets
++
++/* Number of packets whose data we look at.
++This can be modified through /proc/net/layer7_numpackets */
++static int num_packets = 10;
++
++static struct pattern_cache {
++	char * regex_string;
++	regexp * pattern;
++	struct pattern_cache * next;
++} * first_pattern_cache = NULL;
++
++/* I'm new to locking.  Here are my assumptions:
++
++- No one will write to /proc/net/layer7_numpackets over and over very fast;
++  if they did, nothing awful would happen.
++
++- This code will never be processing the same packet twice at the same time,
++  because iptables rules are traversed in order.
++
++- It doesn't matter if two packets from different connections are in here at
++  the same time, because they don't share any data.
++
++- It _does_ matter if two packets from the same connection (or one from a
++  master and one from its child) are here at the same time.  In this case,
++  we have to protect the conntracks and the list of compiled patterns.
++*/
++DEFINE_RWLOCK(ct_lock);
++DEFINE_SPINLOCK(list_lock);
++
++#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++/* Converts an unfriendly string into a friendly one by
++replacing unprintables with periods and all whitespace with " ". */
++static char * friendly_print(unsigned char * s)
++{
++	char * f = kmalloc(strlen(s) + 1, GFP_ATOMIC);
++	int i;
++
++	if(!f) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in friendly_print, bailing.\n");
++		return NULL;
++	}
++
++	for(i = 0; i < strlen(s); i++){
++		if(isprint(s[i]) && s[i] < 128)	f[i] = s[i];
++		else if(isspace(s[i]))		f[i] = ' ';
++		else 				f[i] = '.';
++	}
++	f[i] = '\0';
++	return f;
++}
++
++static char dec2hex(int i)
++{
++	switch (i) {
++		case 0 ... 9:
++			return (char)(i + '0');
++			break;
++		case 10 ... 15:
++			return (char)(i - 10 + 'a');
++			break;
++		default:
++			if (net_ratelimit())
++				printk("Problem in dec2hex\n");
++			return '\0';
++	}
++}
++
++static char * hex_print(unsigned char * s)
++{
++	char * g = kmalloc(strlen(s)*3 + 1, GFP_ATOMIC);
++	int i;
++
++	if(!g) {
++	       if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in hex_print, bailing.\n");
++	       return NULL;
++	}
++
++	for(i = 0; i < strlen(s); i++) {
++		g[i*3    ] = dec2hex(s[i]/16);
++		g[i*3 + 1] = dec2hex(s[i]%16);
++		g[i*3 + 2] = ' ';
++	}
++	g[i*3] = '\0';
++
++	return g;
++}
++#endif // DEBUG
++
++/* Use instead of regcomp.  As we expect to be seeing the same regexps over and
++over again, it make sense to cache the results. */
++static regexp * compile_and_cache(char * regex_string, char * protocol)
++{
++	struct pattern_cache * node               = first_pattern_cache;
++	struct pattern_cache * last_pattern_cache = first_pattern_cache;
++	struct pattern_cache * tmp;
++	unsigned int len;
++
++	while (node != NULL) {
++		if (!strcmp(node->regex_string, regex_string))
++		return node->pattern;
++
++		last_pattern_cache = node;/* points at the last non-NULL node */
++		node = node->next;
++	}
++
++	/* If we reach the end of the list, then we have not yet cached
++	   the pattern for this regex. Let's do that now.
++	   Be paranoid about running out of memory to avoid list corruption. */
++	tmp = kmalloc(sizeof(struct pattern_cache), GFP_ATOMIC);
++
++	if(!tmp) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in compile_and_cache, bailing.\n");
++		return NULL;
++	}
++
++	tmp->regex_string  = kmalloc(strlen(regex_string) + 1, GFP_ATOMIC);
++	tmp->pattern       = kmalloc(sizeof(struct regexp),    GFP_ATOMIC);
++	tmp->next = NULL;
++
++	if(!tmp->regex_string || !tmp->pattern) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in compile_and_cache, bailing.\n");
++		kfree(tmp->regex_string);
++		kfree(tmp->pattern);
++		kfree(tmp);
++		return NULL;
++	}
++
++	/* Ok.  The new node is all ready now. */
++	node = tmp;
++
++	if(first_pattern_cache == NULL) /* list is empty */
++		first_pattern_cache = node; /* make node the beginning */
++	else
++		last_pattern_cache->next = node; /* attach node to the end */
++
++	/* copy the string and compile the regex */
++	len = strlen(regex_string);
++	DPRINTK("About to compile this: \"%s\"\n", regex_string);
++	node->pattern = regcomp(regex_string, &len);
++	if ( !node->pattern ) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: Error compiling regexp \"%s\" (%s)\n", regex_string, protocol);
++		/* pattern is now cached as NULL, so we won't try again. */
++	}
++
++	strcpy(node->regex_string, regex_string);
++	return node->pattern;
++}
++
++static int can_handle(const struct sk_buff *skb)
++{
++	if(!skb->nh.iph) /* not IP */
++		return 0;
++	if(skb->nh.iph->protocol != IPPROTO_TCP &&
++	   skb->nh.iph->protocol != IPPROTO_UDP &&
++	   skb->nh.iph->protocol != IPPROTO_ICMP)
++		return 0;
++	return 1;
++}
++
++/* Returns offset the into the skb->data that the application data starts */
++static int app_data_offset(const struct sk_buff *skb)
++{
++	/* In case we are ported somewhere (ebtables?) where skb->nh.iph
++	isn't set, this can be gotten from 4*(skb->data[0] & 0x0f) as well. */
++	int ip_hl = 4*skb->nh.iph->ihl;
++
++	if( skb->nh.iph->protocol == IPPROTO_TCP ) {
++		/* 12 == offset into TCP header for the header length field.
++		Can't get this with skb->h.th->doff because the tcphdr
++		struct doesn't get set when routing (this is confirmed to be
++		true in Netfilter as well as QoS.) */
++		int tcp_hl = 4*(skb->data[ip_hl + 12] >> 4);
++
++		return ip_hl + tcp_hl;
++	} else if( skb->nh.iph->protocol == IPPROTO_UDP  ) {
++		return ip_hl + 8; /* UDP header is always 8 bytes */
++	} else if( skb->nh.iph->protocol == IPPROTO_ICMP ) {
++		return ip_hl + 8; /* ICMP header is 8 bytes */
++	} else {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: tried to handle unknown protocol!\n");
++		return ip_hl + 8; /* something reasonable */
++	}
++}
++
++/* handles whether there's a match when we aren't appending data anymore */
++static int match_no_append(struct ip_conntrack * conntrack, struct ip_conntrack * master_conntrack,
++			enum ip_conntrack_info ctinfo, enum ip_conntrack_info master_ctinfo,
++			struct ipt_layer7_info * info)
++{
++	/* If we're in here, throw the app data away */
++	write_lock(&ct_lock);
++	if(master_conntrack->layer7.app_data != NULL) {
++
++	#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++		if(!master_conntrack->layer7.app_proto) {
++			char * f = friendly_print(master_conntrack->layer7.app_data);
++			char * g = hex_print(master_conntrack->layer7.app_data);
++			DPRINTK("\nl7-filter gave up after %d bytes (%d packets):\n%s\n",
++				strlen(f), TOTAL_PACKETS, f);
++			kfree(f);
++			DPRINTK("In hex: %s\n", g);
++			kfree(g);
++		}
++	#endif
++
++		kfree(master_conntrack->layer7.app_data);
++		master_conntrack->layer7.app_data = NULL; /* don't free again */
++	}
++	write_unlock(&ct_lock);
++
++	if(master_conntrack->layer7.app_proto){
++		/* Here child connections set their .app_proto (for /proc/net/ip_conntrack) */
++		write_lock(&ct_lock);
++		if(!conntrack->layer7.app_proto) {
++			conntrack->layer7.app_proto = kmalloc(strlen(master_conntrack->layer7.app_proto)+1, GFP_ATOMIC);
++			if(!conntrack->layer7.app_proto){
++				if (net_ratelimit())
++					printk(KERN_ERR "layer7: out of memory in match_no_append, bailing.\n");
++				write_unlock(&ct_lock);
++				return 1;
++			}
++			strcpy(conntrack->layer7.app_proto, master_conntrack->layer7.app_proto);
++		}
++		write_unlock(&ct_lock);
++
++		return (!strcmp(master_conntrack->layer7.app_proto, info->protocol));
++	}
++	else {
++		/* If not classified, set to "unknown" to distinguish from
++		connections that are still being tested. */
++		write_lock(&ct_lock);
++		master_conntrack->layer7.app_proto = kmalloc(strlen("unknown")+1, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_proto){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: out of memory in match_no_append, bailing.\n");
++			write_unlock(&ct_lock);
++			return 1;
++		}
++		strcpy(master_conntrack->layer7.app_proto, "unknown");
++		write_unlock(&ct_lock);
++		return 0;
++	}
++}
++
++/* add the new app data to the conntrack.  Return number of bytes added. */
++static int add_data(struct ip_conntrack * master_conntrack,
++			char * app_data, int appdatalen)
++{
++	int length = 0, i;
++	int oldlength = master_conntrack->layer7.app_data_len;
++
++	// This is a fix for a race condition by Deti Fliegl. However, I'm not 
++	// clear on whether the race condition exists or whether this really 
++	// fixes it.  I might just be being dense... Anyway, if it's not really 
++	// a fix, all it does is waste a very small amount of time.
++	if(!master_conntrack->layer7.app_data) return 0;
++
++	/* Strip nulls. Make everything lower case (our regex lib doesn't
++	do case insensitivity).  Add it to the end of the current data. */
++	for(i = 0; i < maxdatalen-oldlength-1 &&
++		   i < appdatalen; i++) {
++		if(app_data[i] != '\0') {
++			master_conntrack->layer7.app_data[length+oldlength] =
++				/* the kernel version of tolower mungs 'upper ascii' */
++				isascii(app_data[i])? tolower(app_data[i]) : app_data[i];
++			length++;
++		}
++	}
++
++	master_conntrack->layer7.app_data[length+oldlength] = '\0';
++	master_conntrack->layer7.app_data_len = length + oldlength;
++
++	return length;
++}
++
++/* Returns true on match and false otherwise.  */
++static int match(/* const */ struct sk_buff *skb,
++	const struct net_device *in, const struct net_device *out,
++	const struct xt_match *match, const void *matchinfo,
++	int offset, unsigned int protoff, int *hotdrop)
++{
++	struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
++	enum ip_conntrack_info master_ctinfo, ctinfo;
++	struct ip_conntrack *master_conntrack, *conntrack;
++	unsigned char * app_data;
++	unsigned int pattern_result, appdatalen;
++	regexp * comppattern;
++
++	if(!can_handle(skb)){
++		DPRINTK("layer7: This is some protocol I can't handle.\n");
++		return info->invert;
++	}
++
++	/* Treat parent & all its children together as one connection, except
++	for the purpose of setting conntrack->layer7.app_proto in the actual
++	connection. This makes /proc/net/ip_conntrack more satisfying. */
++	if(!(conntrack = ip_conntrack_get((struct sk_buff *)skb, &ctinfo)) ||
++	   !(master_conntrack = ip_conntrack_get((struct sk_buff *)skb, &master_ctinfo))) {
++		//DPRINTK("layer7: packet is not from a known connection, giving up.\n");
++		return info->invert;
++	}
++
++	/* Try to get a master conntrack (and its master etc) for FTP, etc. */
++	while (master_ct(master_conntrack) != NULL)
++		master_conntrack = master_ct(master_conntrack);
++
++	/* if we've classified it or seen too many packets */
++	if(TOTAL_PACKETS > num_packets ||
++	   master_conntrack->layer7.app_proto) {
++
++		pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info);
++
++		/* skb->cb[0] == seen. Avoid doing things twice if there are two l7
++		rules. I'm not sure that using cb for this purpose is correct, although
++		it says "put your private variables there". But it doesn't look like it
++		is being used for anything else in the skbs that make it here. How can
++		I write to cb without making the compiler angry? */
++		skb->cb[0] = 1; /* marking it seen here is probably irrelevant, but consistant */
++
++		return (pattern_result ^ info->invert);
++	}
++
++	if(skb_is_nonlinear(skb)){
++		if(skb_linearize(skb) != 0){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: failed to linearize packet, bailing.\n");
++			return info->invert;
++		}
++	}
++
++	/* now that the skb is linearized, it's safe to set these. */
++	app_data = skb->data + app_data_offset(skb);
++	appdatalen = skb->tail - app_data;
++
++	spin_lock_bh(&list_lock);
++	/* the return value gets checked later, when we're ready to use it */
++	comppattern = compile_and_cache(info->pattern, info->protocol);
++	spin_unlock_bh(&list_lock);
++
++	/* On the first packet of a connection, allocate space for app data */
++	write_lock(&ct_lock);
++	if(TOTAL_PACKETS == 1 && !skb->cb[0] && !master_conntrack->layer7.app_data) {
++		master_conntrack->layer7.app_data = kmalloc(maxdatalen, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_data){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
++			write_unlock(&ct_lock);
++			return info->invert;
++		}
++
++		master_conntrack->layer7.app_data[0] = '\0';
++	}
++	write_unlock(&ct_lock);
++
++	/* Can be here, but unallocated, if numpackets is increased near
++	the beginning of a connection */
++	if(master_conntrack->layer7.app_data == NULL)
++		return (info->invert); /* unmatched */
++
++	if(!skb->cb[0]){
++		int newbytes;
++		write_lock(&ct_lock);
++		newbytes = add_data(master_conntrack, app_data, appdatalen);
++		write_unlock(&ct_lock);
++
++		if(newbytes == 0) { /* didn't add any data */
++			skb->cb[0] = 1;
++			/* Didn't match before, not going to match now */
++			return info->invert;
++		}
++	}
++
++	/* If looking for "unknown", then never match.  "Unknown" means that
++	we've given up; we're still trying with these packets. */
++	read_lock(&ct_lock);
++	if(!strcmp(info->protocol, "unknown")) {
++		pattern_result = 0;
++	/* If the regexp failed to compile, don't bother running it */
++	} else if(comppattern && regexec(comppattern, master_conntrack->layer7.app_data)) {
++		DPRINTK("layer7: matched %s\n", info->protocol);
++		pattern_result = 1;
++	} else pattern_result = 0;
++	read_unlock(&ct_lock);
++
++	if(pattern_result) {
++		write_lock(&ct_lock);
++		master_conntrack->layer7.app_proto = kmalloc(strlen(info->protocol)+1, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_proto){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
++			write_unlock(&ct_lock);
++			return (pattern_result ^ info->invert);
++		}
++		strcpy(master_conntrack->layer7.app_proto, info->protocol);
++		write_unlock(&ct_lock);
++	}
++
++	/* mark the packet seen */
++	skb->cb[0] = 1;
++
++	return (pattern_result ^ info->invert);
++}
++
++static int checkentry(const char *tablename, const void *ip,
++	const struct xt_match *match, void *matchinfo, unsigned int matchsize,
++	unsigned int hook_mask)
++{
++//        struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
++
++	if (matchsize != IPT_ALIGN(sizeof(struct ipt_layer7_info)))
++		return 0;
++
++	return 1;
++}
++
++static struct ipt_match layer7_match = {
++	.name = "layer7",
++	.match = &match,
++	.checkentry = &checkentry,
++	.matchsize  = sizeof(struct ipt_layer7_info),
++	.me = THIS_MODULE
++};
++
++/* taken from drivers/video/modedb.c */
++static int my_atoi(const char *s)
++{
++	int val = 0;
++
++	for (;; s++) {
++		switch (*s) {
++			case '0'...'9':
++			val = 10*val+(*s-'0');
++			break;
++		default:
++			return val;
++		}
++	}
++}
++
++/* write out num_packets to userland. */
++static int layer7_read_proc(char* page, char ** start, off_t off, int count,
++		     int* eof, void * data)
++{
++	if(num_packets > 99 && net_ratelimit())
++		printk(KERN_ERR "layer7: NOT REACHED. num_packets too big\n");
++
++	page[0] = num_packets/10 + '0';
++	page[1] = num_packets%10 + '0';
++	page[2] = '\n';
++	page[3] = '\0';
++
++	*eof=1;
++
++	return 3;
++}
++
++/* Read in num_packets from userland */
++static int layer7_write_proc(struct file* file, const char* buffer,
++		      unsigned long count, void *data)
++{
++	char * foo = kmalloc(count, GFP_ATOMIC);
++
++	if(!foo){
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory, bailing. num_packets unchanged.\n");
++		return count;
++	}
++
++	if(copy_from_user(foo, buffer, count)) {
++		return -EFAULT;
++	}
++
++
++	num_packets = my_atoi(foo);
++	kfree (foo);
++
++	/* This has an arbitrary limit to make the math easier. I'm lazy.
++	But anyway, 99 is a LOT! If you want more, you're doing it wrong! */
++	if(num_packets > 99) {
++		printk(KERN_WARNING "layer7: num_packets can't be > 99.\n");
++		num_packets = 99;
++	} else if(num_packets < 1) {
++		printk(KERN_WARNING "layer7: num_packets can't be < 1.\n");
++		num_packets = 1;
++	}
++
++	return count;
++}
++
++/* register the proc file */
++static void layer7_init_proc(void)
++{
++	struct proc_dir_entry* entry;
++	entry = create_proc_entry("layer7_numpackets", 0644, proc_net);
++	entry->read_proc = layer7_read_proc;
++	entry->write_proc = layer7_write_proc;
++}
++
++static void layer7_cleanup_proc(void)
++{
++	remove_proc_entry("layer7_numpackets", proc_net);
++}
++
++static int __init ipt_layer7_init(void)
++{
++	layer7_init_proc();
++	if(maxdatalen < 1) {
++		printk(KERN_WARNING "layer7: maxdatalen can't be < 1, using 1\n");
++		maxdatalen = 1;
++	}
++	/* This is not a hard limit.  It's just here to prevent people from
++	bringing their slow machines to a grinding halt. */
++	else if(maxdatalen > 65536) {
++		printk(KERN_WARNING "layer7: maxdatalen can't be > 65536, using 65536\n");
++		maxdatalen = 65536;
++	}
++	return ipt_register_match(&layer7_match);
++}
++
++static void __exit ipt_layer7_fini(void)
++{
++	layer7_cleanup_proc();
++	ipt_unregister_match(&layer7_match);
++}
++
++module_init(ipt_layer7_init);
++module_exit(ipt_layer7_fini);
+--- linux-2.6.18/net/ipv4/netfilter/regexp/regexp.c	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.6.18-layer7/net/ipv4/netfilter/regexp/regexp.c	2006-09-24 10:17:45.000000000 -0500
+@@ -0,0 +1,1197 @@
++/*
++ * regcomp and regexec -- regsub and regerror are elsewhere
++ * @(#)regexp.c	1.3 of 18 April 87
++ *
++ *	Copyright (c) 1986 by University of Toronto.
++ *	Written by Henry Spencer.  Not derived from licensed software.
++ *
++ *	Permission is granted to anyone to use this software for any
++ *	purpose on any computer system, and to redistribute it freely,
++ *	subject to the following restrictions:
++ *
++ *	1. The author is not responsible for the consequences of use of
++ *		this software, no matter how awful, even if they arise
++ *		from defects in it.
++ *
++ *	2. The origin of this software must not be misrepresented, either
++ *		by explicit claim or by omission.
++ *
++ *	3. Altered versions must be plainly marked as such, and must not
++ *		be misrepresented as being the original software.
++ *
++ * Beware that some of this code is subtly aware of the way operator
++ * precedence is structured in regular expressions.  Serious changes in
++ * regular-expression syntax might require a total rethink.
++ *
++ * This code was modified by Ethan Sommer to work within the kernel
++ * (it now uses kmalloc etc..)
++ *
++ * Modified slightly by Matthew Strait to use more modern C.
++ */
++
++#include "regexp.h"
++#include "regmagic.h"
++
++/* added by ethan and matt.  Lets it work in both kernel and user space.
++(So iptables can use it, for instance.)  Yea, it goes both ways... */
++#if __KERNEL__
++  #define malloc(foo) kmalloc(foo,GFP_ATOMIC)
++#else
++  #define printk(format,args...) printf(format,##args)
++#endif
++
++void regerror(char * s)
++{
++        printk("<3>Regexp: %s\n", s);
++        /* NOTREACHED */
++}
++
++/*
++ * The "internal use only" fields in regexp.h are present to pass info from
++ * compile to execute that permits the execute phase to run lots faster on
++ * simple cases.  They are:
++ *
++ * regstart	char that must begin a match; '\0' if none obvious
++ * reganch	is the match anchored (at beginning-of-line only)?
++ * regmust	string (pointer into program) that match must include, or NULL
++ * regmlen	length of regmust string
++ *
++ * Regstart and reganch permit very fast decisions on suitable starting points
++ * for a match, cutting down the work a lot.  Regmust permits fast rejection
++ * of lines that cannot possibly match.  The regmust tests are costly enough
++ * that regcomp() supplies a regmust only if the r.e. contains something
++ * potentially expensive (at present, the only such thing detected is * or +
++ * at the start of the r.e., which can involve a lot of backup).  Regmlen is
++ * supplied because the test in regexec() needs it and regcomp() is computing
++ * it anyway.
++ */
++
++/*
++ * Structure for regexp "program".  This is essentially a linear encoding
++ * of a nondeterministic finite-state machine (aka syntax charts or
++ * "railroad normal form" in parsing technology).  Each node is an opcode
++ * plus a "next" pointer, possibly plus an operand.  "Next" pointers of
++ * all nodes except BRANCH implement concatenation; a "next" pointer with
++ * a BRANCH on both ends of it is connecting two alternatives.  (Here we
++ * have one of the subtle syntax dependencies:  an individual BRANCH (as
++ * opposed to a collection of them) is never concatenated with anything
++ * because of operator precedence.)  The operand of some types of node is
++ * a literal string; for others, it is a node leading into a sub-FSM.  In
++ * particular, the operand of a BRANCH node is the first node of the branch.
++ * (NB this is *not* a tree structure:  the tail of the branch connects
++ * to the thing following the set of BRANCHes.)  The opcodes are:
++ */
++
++/* definition	number	opnd?	meaning */
++#define	END	0	/* no	End of program. */
++#define	BOL	1	/* no	Match "" at beginning of line. */
++#define	EOL	2	/* no	Match "" at end of line. */
++#define	ANY	3	/* no	Match any one character. */
++#define	ANYOF	4	/* str	Match any character in this string. */
++#define	ANYBUT	5	/* str	Match any character not in this string. */
++#define	BRANCH	6	/* node	Match this alternative, or the next... */
++#define	BACK	7	/* no	Match "", "next" ptr points backward. */
++#define	EXACTLY	8	/* str	Match this string. */
++#define	NOTHING	9	/* no	Match empty string. */
++#define	STAR	10	/* node	Match this (simple) thing 0 or more times. */
++#define	PLUS	11	/* node	Match this (simple) thing 1 or more times. */
++#define	OPEN	20	/* no	Mark this point in input as start of #n. */
++			/*	OPEN+1 is number 1, etc. */
++#define	CLOSE	30	/* no	Analogous to OPEN. */
++
++/*
++ * Opcode notes:
++ *
++ * BRANCH	The set of branches constituting a single choice are hooked
++ *		together with their "next" pointers, since precedence prevents
++ *		anything being concatenated to any individual branch.  The
++ *		"next" pointer of the last BRANCH in a choice points to the
++ *		thing following the whole choice.  This is also where the
++ *		final "next" pointer of each individual branch points; each
++ *		branch starts with the operand node of a BRANCH node.
++ *
++ * BACK		Normal "next" pointers all implicitly point forward; BACK
++ *		exists to make loop structures possible.
++ *
++ * STAR,PLUS	'?', and complex '*' and '+', are implemented as circular
++ *		BRANCH structures using BACK.  Simple cases (one character
++ *		per match) are implemented with STAR and PLUS for speed
++ *		and to minimize recursive plunges.
++ *
++ * OPEN,CLOSE	...are numbered at compile time.
++ */
++
++/*
++ * A node is one char of opcode followed by two chars of "next" pointer.
++ * "Next" pointers are stored as two 8-bit pieces, high order first.  The
++ * value is a positive offset from the opcode of the node containing it.
++ * An operand, if any, simply follows the node.  (Note that much of the
++ * code generation knows about this implicit relationship.)
++ *
++ * Using two bytes for the "next" pointer is vast overkill for most things,
++ * but allows patterns to get big without disasters.
++ */
++#define	OP(p)	(*(p))
++#define	NEXT(p)	(((*((p)+1)&0377)<<8) + (*((p)+2)&0377))
++#define	OPERAND(p)	((p) + 3)
++
++/*
++ * See regmagic.h for one further detail of program structure.
++ */
++
++
++/*
++ * Utility definitions.
++ */
++#ifndef CHARBITS
++#define	UCHARAT(p)	((int)*(unsigned char *)(p))
++#else
++#define	UCHARAT(p)	((int)*(p)&CHARBITS)
++#endif
++
++#define	FAIL(m)	{ regerror(m); return(NULL); }
++#define	ISMULT(c)	((c) == '*' || (c) == '+' || (c) == '?')
++#define	META	"^$.[()|?+*\\"
++
++/*
++ * Flags to be passed up and down.
++ */
++#define	HASWIDTH	01	/* Known never to match null string. */
++#define	SIMPLE		02	/* Simple enough to be STAR/PLUS operand. */
++#define	SPSTART		04	/* Starts with * or +. */
++#define	WORST		0	/* Worst case. */
++
++/*
++ * Global work variables for regcomp().
++ */
++struct match_globals {
++char *reginput;		/* String-input pointer. */
++char *regbol;		/* Beginning of input, for ^ check. */
++char **regstartp;	/* Pointer to startp array. */
++char **regendp;		/* Ditto for endp. */
++char *regparse;		/* Input-scan pointer. */
++int regnpar;		/* () count. */
++char regdummy;
++char *regcode;		/* Code-emit pointer; &regdummy = don't. */
++long regsize;		/* Code size. */
++};
++
++/*
++ * Forward declarations for regcomp()'s friends.
++ */
++#ifndef STATIC
++#define	STATIC	static
++#endif
++STATIC char *reg(struct match_globals *g, int paren,int *flagp);
++STATIC char *regbranch(struct match_globals *g, int *flagp);
++STATIC char *regpiece(struct match_globals *g, int *flagp);
++STATIC char *regatom(struct match_globals *g, int *flagp);
++STATIC char *regnode(struct match_globals *g, char op);
++STATIC char *regnext(struct match_globals *g, char *p);
++STATIC void regc(struct match_globals *g, char b);
++STATIC void reginsert(struct match_globals *g, char op, char *opnd);
++STATIC void regtail(struct match_globals *g, char *p, char *val);
++STATIC void regoptail(struct match_globals *g, char *p, char *val);
++
++
++__kernel_size_t my_strcspn(const char *s1,const char *s2)
++{
++        char *scan1;
++        char *scan2;
++        int count;
++
++        count = 0;
++        for (scan1 = (char *)s1; *scan1 != '\0'; scan1++) {
++                for (scan2 = (char *)s2; *scan2 != '\0';)       /* ++ moved down. */
++                        if (*scan1 == *scan2++)
++                                return(count);
++                count++;
++        }
++        return(count);
++}
++
++/*
++ - regcomp - compile a regular expression into internal code
++ *
++ * We can't allocate space until we know how big the compiled form will be,
++ * but we can't compile it (and thus know how big it is) until we've got a
++ * place to put the code.  So we cheat:  we compile it twice, once with code
++ * generation turned off and size counting turned on, and once "for real".
++ * This also means that we don't allocate space until we are sure that the
++ * thing really will compile successfully, and we never have to move the
++ * code and thus invalidate pointers into it.  (Note that it has to be in
++ * one piece because free() must be able to free it all.)
++ *
++ * Beware that the optimization-preparation code in here knows about some
++ * of the structure of the compiled regexp.
++ */
++regexp *
++regcomp(char *exp,int *patternsize)
++{
++	register regexp *r;
++	register char *scan;
++	register char *longest;
++	register int len;
++	int flags;
++	struct match_globals g;
++	
++	/* commented out by ethan
++	   extern char *malloc();
++	*/
++
++	if (exp == NULL)
++		FAIL("NULL argument");
++
++	/* First pass: determine size, legality. */
++	g.regparse = exp;
++	g.regnpar = 1;
++	g.regsize = 0L;
++	g.regcode = &g.regdummy;
++	regc(&g, MAGIC);
++	if (reg(&g, 0, &flags) == NULL)
++		return(NULL);
++
++	/* Small enough for pointer-storage convention? */
++	if (g.regsize >= 32767L)		/* Probably could be 65535L. */
++		FAIL("regexp too big");
++
++	/* Allocate space. */
++	*patternsize=sizeof(regexp) + (unsigned)g.regsize;
++	r =