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-rwxr-xr-xscripts/runqemu-ifdown66
1 files changed, 66 insertions, 0 deletions
diff --git a/scripts/runqemu-ifdown b/scripts/runqemu-ifdown
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1#!/bin/bash
2#
3# QEMU network configuration script to bring down tap devices. This
4# utility needs to be run as root, and will use the tunctl binary
5# from the native sysroot.
6#
7# If you find yourself calling this script a lot, you can add the
8# the following to your /etc/sudoers file to be able to run this
9# command without entering your password each time:
10#
11# <my-username> ALL=NOPASSWD: /path/to/runqemu-ifup
12# <my-username> ALL=NOPASSWD: /path/to/runqemu-ifdown
13#
14# Copyright (c) 2006-2011 Linux Foundation
15#
16# This program is free software; you can redistribute it and/or modify
17# it under the terms of the GNU General Public License version 2 as
18# published by the Free Software Foundation.
19#
20# This program is distributed in the hope that it will be useful,
21# but WITHOUT ANY WARRANTY; without even the implied warranty of
22# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23# GNU General Public License for more details.
24#
25# You should have received a copy of the GNU General Public License along
26# with this program; if not, write to the Free Software Foundation, Inc.,
27# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28
29usage() {
30 echo "sudo $(basename $0) <tap-dev> <native-sysroot-basedir>"
31}
32
33if [ $EUID -ne 0 ]; then
34 echo "Error: This script (runqemu-ifdown) must be run with root privileges"
35 exit 1
36fi
37
38if [ $# -ne 2 ]; then
39 usage
40 exit 1
41fi
42
43TAP=$1
44NATIVE_SYSROOT_DIR=$2
45
46TUNCTL=$NATIVE_SYSROOT_DIR/usr/bin/tunctl
47if [ ! -e "$TUNCTL" ]; then
48 echo "Error: Unable to find tunctl binary in '$NATIVE_SYSROOT_DIR/usr/bin', please bitbake qemu-helper-native"
49 exit 1
50fi
51
52$TUNCTL -d $TAP
53
54# cleanup the remaining iptables rules
55IPTABLES=`which iptables 2> /dev/null`
56if [ "x$IPTABLES" = "x" ]; then
57 IPTABLES=/sbin/iptables
58fi
59if [ ! -x "$IPTABLES" ]; then
60 echo "$IPTABLES cannot be executed"
61 exit 1
62fi
63n=$[ (`echo $TAP | sed 's/tap//'` * 2) + 1 ]
64dest=$[ (`echo $TAP | sed 's/tap//'` * 2) + 2 ]
65$IPTABLES -D POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$n/32
66$IPTABLES -D POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$dest/32