diff options
Diffstat (limited to 'scripts/runqemu-ifup')
| -rwxr-xr-x | scripts/runqemu-ifup | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/scripts/runqemu-ifup b/scripts/runqemu-ifup new file mode 100755 index 0000000000..c963af5df9 --- /dev/null +++ b/scripts/runqemu-ifup @@ -0,0 +1,95 @@ +#!/bin/bash +# +# QEMU network interface configuration script. This utility needs to +# be run as root, and will use the tunctl binary from a Poky sysroot. +# Note: many Linux distros these days still use an older version of +# tunctl which does not support the group permissions option, hence +# the need to use Poky's version. +# +# If you find yourself calling this script a lot, you can add the +# the following to your /etc/sudoers file to be able to run this +# command without entering your password each time: +# +# <my-username> ALL=NOPASSWD: /path/to/runqemu-ifup +# <my-username> ALL=NOPASSWD: /path/to/runqemu-ifdown +# +# If you'd like to create a bank of tap devices at once, you should use +# the poky-gen-tapdevs script instead. If tap devices are set up using +# that script, the runqemu script will never end up calling this +# script. +# +# Copyright (c) 2006-2010 Intel Corp. +# +# 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 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., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +usage() { + echo "sudo $(basename $0) <gid> <native-sysroot-basedir>" +} + +if [ $EUID -ne 0 ]; then + echo "Error: This script (runqemu-ifup) must be run with root privileges" + exit 1 +fi + +if [ $# -ne 2 ]; then + usage + exit 1 +fi + +GROUP="-g $1" +NATIVE_SYSROOT_DIR=$2 + +TUNCTL=$NATIVE_SYSROOT_DIR/usr/bin/tunctl +if [ ! -x "$TUNCTL" ]; then + echo "Error: Unable to find tunctl binary in '$NATIVE_SYSROOT_DIR/usr/bin'" + exit 1 +fi + +TAP=`$TUNCTL -b $GROUP 2>&1` +STATUS=$? +if [ $STATUS -ne 0 ]; then + echo "tunctl failed:" + echo $TAP + exit 1 +fi + +IFCONFIG=`which ifconfig` +if [ "x$IFCONFIG" = "x" ]; then + # better than nothing... + IFCONFIG=/sbin/ifconfig +fi + +ROUTE=`which route` +if [ "x$ROUTE" = "x" ]; then + # better than nothing... + ROUTE=/sbin/route +fi + +n=$[ (`echo $TAP | sed 's/tap//'` * 2) + 1 ] +$IFCONFIG $TAP 192.168.7.$n + +dest=$[ (`echo $TAP | sed 's/tap//'` * 2) + 2 ] +$ROUTE add -host 192.168.7.$dest $TAP + +# setup NAT for tap0 interface to have internet access in QEMU +IPTABLES=`which iptables` +if [ "x$IPTABLES" = "x" ]; then + IPTABLES=/sbin/iptables +fi + +$IPTABLES -A POSTROUTING -t nat -j MASQUERADE -s 192.168.7.0/24 +echo 1 > /proc/sys/net/ipv4/ip_forward +$IPTABLES -P FORWARD ACCEPT + +echo $TAP |