#! /bin/bash
#
# Author: Eicke Friedrich
#
# Bridge control script
#
# Interfaces eth0 and eth1 become br0
#
# If you want to give the bridge interface
# an IP adress put it here, else use 0.0.0.0
PUBLIC_IP=0.0.0.0
PUBLIC_NETMASK=255.255.255.0
PUBLIC_GATEWAY=0.0.0.0

PUBLIC_DEVICE=eth0

case "$1" in
 start)
   echo -n "Starting bridge ... "

   brctl addbr br0
   brctl stp br0 off

   brctl addif br0 eth0
   brctl addif br0 eth1

   ifconfig eth0 down
   ifconfig eth1 down

   ifconfig eth0 0.0.0.0 up
   ifconfig eth1 0.0.0.0 up

   ifconfig br0 $PUBLIC_IP
   ifconfig br0 netmask $PUBLIC_NETMASK
   ifconfig br0 up
   route add default gw $PUBLIC_GATEWAY

   echo "done"
   ;;

 stop)
   echo -n "Stopping bridge ... "

   brctl delif br0 eth0
   brctl delif br0 eth1

   ifconfig br0 down
   brctl delbr br0

   ifconfig $PUBLIC_DEVICE $PUBLIC_IP
   ifconfig $PUBLIC_DEVICE netmask $PUBLIC_NETMASK
   ifconfig $PUBLIC_DEVICE up

   route add default gw $PUBLIC_GATEWAY

   echo "done"
   ;;

 restart)
   echo -n "Restarting bridge ... "

   ifconfig br0 down
   ifconfig br0 up

   echo "done"
   ;;
 
 *)
   echo "Usage: $0 {start|stop|restart}"
   exit 1
   ;;
esac

exit 0