ip/setup at master · howerj/ip · GitHub

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#!/bin/bash
# This script is for testing only.
#set -eux;
DELETE=false;
IF0=tap0
IF1=tap1
MAC0=C0:11:11:11:11:11
MAC1=C0:22:22:22:22:22
IP0=192.168.10.1
IP1=192.168.10.2

usage () {
	echo "Usage: $0 ";
	echo "Setup test network for <https://github.com/howerj/ip>, a TCP/IP stack";
	echo "";
	echo "Options:";
	echo "";
	echo "-d or --delete: delete Linux TAP interaces and bridges"
	echo "-h or --help:   print this help and exit"
	echo "-0:             run instance of first 'ip'"
	echo "-1:             run instance of second 'ip'"
	echo "-s0:            run instance of socat on first interface"
	echo "-s1:            run instance of socat on second interface"
	echo ""
}

while [[ $# -gt 0 ]]; do
	case $1 in
	-d|--delete)
		DELETE=true;
		shift;
		;;
	-h|--help)
		usage;
		exit;
		;;
	-0)
		make ip
		./ip -vvv -o interface=${IF0} -o mac=${MAC0} -o ip=${IP0}
		exit;
		;;
	-1)
		make ip
		./ip -vvv -o interface=${IF1} -o mac=${MAC1} -o ip=${IP1}
		exit;
		;;
	-s0)
		socat -u TUN,tun-name=${IF0},tun-type=tap /dev/null
		exit
		;;
	-s1)
		socat -u TUN,tun-name=${IF1},tun-type=tap /dev/null
		exit
		;;
	*)
	echo "Invalid option: $1"
		usage;
		;;
	esac
done

if [ $DELETE = "true" ]; then
	ip link delete br0
	ip link delete ${IF0}
	ip link delete ${IF1}
	exit;
fi;

ip link add br0 type bridge;
ip tuntap add mode tap name ${IF0};
ip tuntap add mode tap name ${IF1};
ip link set address ${MAC0} ${IF0}
ip link set address ${MAC1} ${IF1}
ip link set ${IF0} master br0;
ip link set ${IF1} master br0;
ip link set dev ${IF0} up;
ip link set dev ${IF1} up;
ip link set dev br0 up;
ip link set ${IF0} promisc on
ip link set ${IF1} promisc on
ip link set br0 promisc on