| #!/bin/bash |
| # |
| # QEMU network configuration script to bring down tap devices. This |
| # utility needs to be run as root, and will use the ip utility |
| # |
| # 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 |
| # |
| # Copyright (c) 2006-2011 Linux Foundation |
| # |
| # SPDX-License-Identifier: GPL-2.0-only |
| # |
| |
| usage() { |
| echo "sudo $(basename $0) <tap-dev> <native-sysroot-basedir>" |
| } |
| |
| if [ $EUID -ne 0 ]; then |
| echo "Error: This script (runqemu-ifdown) must be run with root privileges" |
| exit 1 |
| fi |
| |
| if [ $# -ne 2 ]; then |
| usage |
| exit 1 |
| fi |
| |
| TAP=$1 |
| STAGING_BINDIR_NATIVE=$2 |
| |
| if !ip tuntap del $TAP mode tap 2>/dev/null; then |
| echo "Error: Unable to run up tuntap del" |
| exit 1 |
| fi |
| |
| IPTOOL=`which ip 2> /dev/null` |
| if [ "x$IPTOOL" = "x" ]; then |
| # better than nothing... |
| IPTOOL=/sbin/ip |
| fi |
| if [ -x "$IPTOOL" ]; then |
| if `$IPTOOL link show $TAP > /dev/null 2>&1`; then |
| $IPTOOL link del $TAP |
| fi |
| fi |
| # cleanup the remaining iptables rules |
| IPTABLES=`which iptables 2> /dev/null` |
| if [ "x$IPTABLES" = "x" ]; then |
| IPTABLES=/sbin/iptables |
| fi |
| if [ ! -x "$IPTABLES" ]; then |
| echo "$IPTABLES cannot be executed" |
| exit 1 |
| fi |
| n=$[ (`echo $TAP | sed 's/tap//'` * 2) + 1 ] |
| dest=$[ (`echo $TAP | sed 's/tap//'` * 2) + 2 ] |
| $IPTABLES -D POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$n/32 |
| $IPTABLES -D POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$dest/32 |
| true |