#!/bin/bash

I4ADDR=$(/sbin/ifconfig eth0 | awk -F"[:\t ]+" '/inet addr/ { print $4}')
I6ADDR=$( printf "2002:%02x%02x:%02x%02x::1" $(echo $I4ADDR | sed 's/\./ /g') )

case $1 in
start)
	ip link set sit0 up
	ip addr add $I6ADDR dev sit0
	ip -6 route add 2000::/3 via ::192.88.99.1
	;;
stop)
	ip -6 route del 2000::/3 via ::192.88.99.1
	ip addr del $I6ADDR dev sit0
	ip link set sit0 down
	;;
*)
	echo "start or stop"
	echo "inet4 addr" $I4ADDR
	echo "inet6 addr" $I6ADDR
	;;
esac