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b97fe9d3e7
Recent patches changed the index of the tap interfaces. They start now with tap1 instead of tap0. Also the IP address starts with 192.168.7.3 instead of 192.168.7.1. This gets reverted to the previous behavior. (From OE-Core rev: eaf9d2dfd8f0270f543b612fbd2df775adc7a394) 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>
111 lines
2.7 KiB
Bash
Executable File
111 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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#
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# QEMU network interface configuration script. This utility needs to
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# be run as root, and will use the ip utility
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#
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# If you find yourself calling this script a lot, you can add the
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# the following to your /etc/sudoers file to be able to run this
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# command without entering your password each time:
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#
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# <my-username> ALL=NOPASSWD: /path/to/runqemu-ifup
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# <my-username> ALL=NOPASSWD: /path/to/runqemu-ifdown
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#
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# If you'd like to create a bank of tap devices at once, you should use
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# the runqemu-gen-tapdevs script instead. If tap devices are set up using
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# that script, the runqemu script will never end up calling this
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# script.
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#
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# Copyright (c) 2006-2011 Linux Foundation
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#
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# SPDX-License-Identifier: GPL-2.0-only
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#
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usage() {
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echo "sudo $(basename $0) <gid>"
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}
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if [ $EUID -ne 0 ]; then
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echo "Error: This script (runqemu-ifup) must be run with root privileges"
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exit 1
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fi
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if [ $# -eq 2 ]; then
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echo "Warning: uid parameter is ignored. It is no longer needed."
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GROUP="$2"
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elif [ $# -eq 1 ]; then
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GROUP="$1"
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else
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usage
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exit 1
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fi
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if [ -z "$OE_TAP_NAME" ]; then
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OE_TAP_NAME=tap
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fi
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if taps=$(ip tuntap list 2>/dev/null); then
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tap_no_last=$(echo "$taps" |cut -f 1 -d ":" |sed "s/$OE_TAP_NAME//g" | sort -rn | head -n 1)
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if [ -z "$tap_no_last" ]; then
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tap_no=0
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else
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tap_no=$(("$tap_no_last" + 1))
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fi
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ip tuntap add "$OE_TAP_NAME$tap_no" mode tap group "$GROUP" && TAP=$OE_TAP_NAME$tap_no
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fi
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if [ -z "$TAP" ]; then
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echo "Error: Unable to find a tap device to use"
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exit 1
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fi
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IPTOOL=`which ip 2> /dev/null`
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if [ "x$IPTOOL" = "x" ]; then
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# better than nothing...
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IPTOOL=/sbin/ip
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fi
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if [ ! -x "$IPTOOL" ]; then
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echo "$IPTOOL cannot be executed"
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exit 1
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fi
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IPTABLES=`which iptables 2> /dev/null`
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if [ "x$IPTABLES" = "x" ]; then
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IPTABLES=/sbin/iptables
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fi
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if [ ! -x "$IPTABLES" ]; then
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echo "$IPTABLES cannot be executed"
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exit 1
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fi
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n=$[ (`echo $TAP | sed "s/$OE_TAP_NAME//"` * 2) + 1 ]
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$IPTOOL addr add 192.168.7.$n/32 broadcast 192.168.7.255 dev $TAP
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STATUS=$?
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if [ $STATUS -ne 0 ]; then
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echo "Failed to set up IP addressing on $TAP"
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exit 1
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fi
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$IPTOOL link set dev $TAP up
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STATUS=$?
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if [ $STATUS -ne 0 ]; then
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echo "Failed to bring up $TAP"
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exit 1
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fi
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dest=$[ (`echo $TAP | sed "s/$OE_TAP_NAME//"` * 2) + 2 ]
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$IPTOOL route add to 192.168.7.$dest dev $TAP
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STATUS=$?
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if [ $STATUS -ne 0 ]; then
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echo "Failed to add route to 192.168.7.$dest using $TAP"
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exit 1
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fi
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# setup NAT for tap0 interface to have internet access in QEMU
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$IPTABLES -A POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$n/32
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$IPTABLES -A POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$dest/32
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echo 1 > /proc/sys/net/ipv4/ip_forward
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echo 1 > /proc/sys/net/ipv4/conf/$TAP/proxy_arp
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$IPTABLES -P FORWARD ACCEPT
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echo $TAP
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