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- #!/bin/bash
- #
- # QEMU network configuration script to bring down tap devices. This
- # utility needs to be run as root, and will use the tunctl binary
- # from the native sysroot.
- #
- # 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=$2
- TUNCTL=$STAGING_BINDIR_NATIVE/tunctl
- if [ ! -e "$TUNCTL" ]; then
- echo "Error: Unable to find tunctl binary in '$STAGING_BINDIR_NATIVE', please bitbake qemu-helper-native"
- exit 1
- fi
- $TUNCTL -d $TAP
- IFCONFIG=`which ip 2> /dev/null`
- if [ "x$IFCONFIG" = "x" ]; then
- # better than nothing...
- IFCONFIG=/sbin/ip
- fi
- if [ -x "$IFCONFIG" ]; then
- if `$IFCONFIG link show $TAP > /dev/null 2>&1`; then
- $IFCONFIG 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
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