| Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 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 | |
| 29 | usage() { |
| 30 | echo "sudo $(basename $0) <tap-dev> <native-sysroot-basedir>" |
| 31 | } |
| 32 | |
| 33 | if [ $EUID -ne 0 ]; then |
| 34 | echo "Error: This script (runqemu-ifdown) must be run with root privileges" |
| 35 | exit 1 |
| 36 | fi |
| 37 | |
| 38 | if [ $# -ne 2 ]; then |
| 39 | usage |
| 40 | exit 1 |
| 41 | fi |
| 42 | |
| 43 | TAP=$1 |
| 44 | NATIVE_SYSROOT_DIR=$2 |
| 45 | |
| 46 | TUNCTL=$NATIVE_SYSROOT_DIR/usr/bin/tunctl |
| 47 | if [ ! -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 |
| 50 | fi |
| 51 | |
| 52 | $TUNCTL -d $TAP |
| 53 | |
| 54 | # cleanup the remaining iptables rules |
| 55 | IPTABLES=`which iptables 2> /dev/null` |
| 56 | if [ "x$IPTABLES" = "x" ]; then |
| 57 | IPTABLES=/sbin/iptables |
| 58 | fi |
| 59 | if [ ! -x "$IPTABLES" ]; then |
| 60 | echo "$IPTABLES cannot be executed" |
| 61 | exit 1 |
| 62 | fi |
| 63 | n=$[ (`echo $TAP | sed 's/tap//'` * 2) + 1 ] |
| 64 | dest=$[ (`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 |