faac9eda28
Without this the command will add a route for the subnet 192.168.7.0 which means multiple qemu instances can't operate correctly since all but the last one will be masked out. (From OE-Core rev: 9e00d6b343120496ec0dd72240c7b04e0a8b7eaa) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2.9 KiB
Executable File
#!/bin/bash
QEMU network interface configuration script. This utility needs to
be run as root, and will use the tunctl binary from a native 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 build system'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:
ALL=NOPASSWD: /path/to/runqemu-ifup
ALL=NOPASSWD: /path/to/runqemu-ifdown
If you'd like to create a bank of tap devices at once, you should use
the runqemu-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) 2006-2011 Linux Foundation
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) " }
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 $TAP
exit 1
fi
IFCONFIG=which ifconfig 2> /dev/null
if [ "x$IFCONFIG" = "x" ]; then
# better than nothing...
IFCONFIG=/sbin/ifconfig
fi
if [ ! -x "$IFCONFIG" ]; then
echo "$IFCONFIG cannot be executed"
exit 1
fi
ROUTE=which route
if [ "x$ROUTE" = "x" ]; then
# better than nothing...
ROUTE=/sbin/route
fi
if [ ! -x "$ROUTE" ]; then
echo "$ROUTE cannot be executed"
exit 1
fi
IPTABLES=which iptables 2> /dev/null
if [ "x$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 ]
$IFCONFIG $TAP 192.168.7.$n netmask 255.255.255.255
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 -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