#!/bin/sh

vpn="PublicVPN"	# Tunnelblick VPN configuration name
dev="tap"	# "tun" or "tap" as defined in VPN config
tries="30"	# wait up to $tries * 5 seconds for gateway host IP
route_add=""	# additional hosts or subnets to route through the VPN
route_del=""	# hosts or subnets to remove from VPN routing table

echo "Starting VPN $vpn..."
osascript -e "
	tell application \"Tunnelblick\"
		connect \"$vpn\"
	end tell"

try=1
while [ -z "$gw_host" -a $try -le $tries ]
do
	sleep 5
	echo "Waiting for gateway host ($try/$tries)..."
	gw_host="`netstat -f inet -n -r | grep -v 'ff:ff:ff:ff:ff:ff' | \
		sed -n \"s/^\([0-9][0-9\.]*\)[[:space:]].*[[:space:]]UH.*$dev[0-9][[:space:]0-9]*\$/\1/p\"`"
	(( try++ ))
done
[ -z "$gw_host" ] && exit 1

echo "Found gateway host $gw_host"

echo "Adding custom routes..."
for net in $route_add; do sudo route add $net $gw_host; done
for net in $route_del; do sudo route delete $net $gw_host; done

echo "Updating dynamic DNS entry..."
nsupdate-ddns.sh