292ca0207d
If there are other tap interfaces than the interfaces created by the runqemu-* scripts, these interfaces are not ignored. This is now fixed by filtering the interfaces for a specific prefix in the interface name. (From OE-Core rev: f65fb5fce45d13c2881acd8295d417635449c52d) Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com> Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2.7 KiB
Executable File
#!/bin/bash
QEMU network interface configuration script. 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:
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
SPDX-License-Identifier: GPL-2.0-only
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 [ $# -eq 2 ]; then echo "Warning: uid parameter is ignored. It is no longer needed." GROUP="$2" elif [ $# -eq 1 ]; then GROUP="$1" else usage exit 1 fi
if [ -z "$OE_TAP_NAME" ]; then OE_TAP_NAME=tap fi
if taps=$(ip tuntap list 2>/dev/null); then tap_no_last=$(echo "$taps" |cut -f 1 -d ":" |grep -E "^$OE_TAP_NAME.*" |sed "s/$OE_TAP_NAME//g" | sort -rn | head -n 1) if [ -z "$tap_no_last" ]; then tap_no=0 else tap_no=$(("$tap_no_last" + 1)) fi ip tuntap add "$OE_TAP_NAME$tap_no" mode tap group "$GROUP" && TAP=$OE_TAP_NAME$tap_no fi
if [ -z "$TAP" ]; then echo "Error: Unable to find a tap device to use" 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
echo "$IPTOOL cannot be executed"
exit 1
fi
IPTABLES=which iptables 2> /dev/null
if [ "x$IPTABLES" = "x" ]; then
IPTABLES=/sbin/iptables
fi
if [ ! -x "$IPTABLES" ]; then
echo "$IPTABLES cannot be executed"
exit 1
fi
n=$[ (echo $TAP | sed "s/$OE_TAP_NAME//" * 2) + 1 ]
$IPTOOL addr add 192.168.7.$n/32 broadcast 192.168.7.255 dev $TAP
STATUS=$?
if [ $STATUS -ne 0 ]; then
echo "Failed to set up IP addressing on $TAP"
exit 1
fi
$IPTOOL link set dev $TAP up
STATUS=$?
if [ $STATUS -ne 0 ]; then
echo "Failed to bring up $TAP"
exit 1
fi
dest=$[ (echo $TAP | sed "s/$OE_TAP_NAME//" * 2) + 2 ]
$IPTOOL route add to 192.168.7.$dest dev $TAP
STATUS=$?
if [ $STATUS -ne 0 ]; then
echo "Failed to add route to 192.168.7.$dest using $TAP"
exit 1
fi
setup NAT for tap0 interface to have internet access in QEMU
$IPTABLES -A POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$n/32 $IPTABLES -A POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$dest/32 echo 1 > /proc/sys/net/ipv4/ip_forward echo 1 > /proc/sys/net/ipv4/conf/$TAP/proxy_arp $IPTABLES -P FORWARD ACCEPT
echo $TAP