#!/bin/sh
# OpenVPN dynamic ip reconfiguration script
# Copyright (C) 2009 Andrea Borgia
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.

. /etc/functions.sh
. /etc/init.d/openvpn


reconfig_service_with_dynamic_address() {
	local section="$1"
	
	local enable=0
	local ipaddr=""

	# Config read/write examples:
	# config_get ipaddr vpn_name local
	# config_set vpn_name local $ipaddr
                       
	# disabled?
	config_get_bool enable "$section" enable 0
	[ "$enable" == 0 ] && return 0

	ipaddr=`ifconfig "$ifname" | grep "inet addr" | cut -d":" -f2 | cut -d" " -f1`
	[ -z "$ipaddr" ] && return 0
	config_set "$section" local "$ipaddr"
}


if [ "$INTERFACE" = "wan" ]; then
	local ifname=""
	config_load network
	config_get ifname wan ifname
	[ -z "$ifname" ] && return 0
	
	config_load openvpn
	case "${ACTION:-ifup}" in
		ifup)
			config_foreach reconfig_service_with_dynamic_address openvpn
			config_foreach stop_service openvpn
			config_foreach start_service openvpn
			;;
		ifdown)
			config_foreach stop_service openvpn
			;;
	esac	
fi