mirror of git://git.yoctoproject.org/poky.git synced 2025-07-19 21:09:03 +02:00

Richard Purdie 609fc15718 runqemu/qemu-helper: Drop tunctl

ip tuntap provides the functionality that we obtained from tunctl. We only
needed tunctl when ifconfig was more available than ip. That isn't the case
now so we can drop tunctl and all the hoops we need to jump through to build
and provide it.

(From OE-Core rev: 2abfbca690ff00cb58ce08a65cde006578ee3de9)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2023-06-16 15:40:11 +01:00

2.4 KiB

Executable File

Raw Blame History

#!/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 [ $# -ne 3 ]; then usage exit 1 fi

USERID="-u $1" GROUP="-g $2"

if taps=$(ip tuntap list 2>/dev/null); then tap_no=$(( $(echo "$taps" |sort -r |sed 's/^tap//; s/:.*//; q') + 1 )) ip tuntap add tap$tap_no mode tap group $2 && TAP=tap$tap_no fi

if [ -z $TAP ]; then echo "Error: Unable to find a tap device to use" exit 1 fi

IFCONFIG=which ip 2> /dev/null if [ "x$IFCONFIG" = "x" ]; then # better than nothing... IFCONFIG=/sbin/ip fi if [ ! -x "$IFCONFIG" ]; then echo "$IFCONFIG 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 ] $IFCONFIG addr add 192.168.7.$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 $IFCONFIG 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/tap//' * 2) + 2 ] $IFCONFIG route add to 192.168.7.$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

2.4 KiB Executable File Raw Blame History