#!/bin/bash
#Copyright 1999, William Stearns.
#No license is granted for this program's use at this time.

#TDEV="tunl0"
TDEV="gre0"
TSERVER="Z.Z.Z.Z"
CLIENTREALIP="Z.Z.Z.Y"

case "$1" in
start|START)
	if [ -z "$CLIENTDIALIP" ]; then
		echo Please run with CLIENTDIALIP set.
		exit
	fi
	echo 1 >/proc/sys/net/ipv4/ip_forward
	echo $CLIENTDIALIP >>/root/bin/CLIENTIPS
	insmod ip_gre

	ifconfig $TDEV $TSERVER pointopoint $CLIENTREALIP netmask 255.255.255.255 up

	route del -host $CLIENTREALIP
	route add -host $CLIENTDIALIP $TDEV
	route add -host $CLIENTREALIP gw $CLIENTDIALIP $TDEV
	route del -host $CLIENTDIALIP $TDEV

	route add -host $CLIENTDIALIP dev eth0
	arp $CLIENTREALIP -Ds eth0 pub
	;;

stop|STOP)
	for AHOST in `cat /root/bin/CLIENTIPS` ; do
		route del -host $AHOST eth0
	done
	rm -f /root/bin/CLIENTIPS

	#route del -host $CLIENTREALIP gw $CLIENTDIALIP $TDEV
	route del -host $CLIENTREALIP $TDEV

	ifconfig $TDEV down
	rmmod ip_gre
	;;
*)
	echo Use \"$0 start\" or \"$0 stop\".
	;;
esac