#!/bin/bash

vpnserver="sthu.org"

serverip=$(host ${vpnserver} | awk '{ print $4 }')
vpnip=$(route -n | grep -m 1 "tun0" | awk '{ print $1 }')


defgw=$(route -n | grep -m 1 "^0.0.0.0" | awk '{ print $2 }')
defif=$(route -n | grep -m 1 "^0.0.0.0" | awk '{ print $8 }')
echo "current default gw ${defgw} dev ${defif}"
echo ""


echo "add route to ${serverip} via dev ${defif}"
route add -host $serverip gw ${defgw} dev ${defif}
echo "remove old default route via gw ${defgw}"
route del default gw ${defgw}
echo "add default gw ${vpnip} (vpnip)"
route add default gw ${vpnip}

echo ""
echo "Press to restore default route"
read


echo "restore default gw ${defgw} dev ${defif}"
route add default gw ${defgw} dev ${defif}
echo "remove default route"
route del default gw ${vpnip}
echo "remove route to ${serverip}"
route del ${serverip} gw ${defgw}