#!/usr/local/bin/php -f
<?php
/* $Id$ */
/*
	rc.carpmaster
	part of pfSense (https://www.pfsense.org)
	Copyright (C) 2004-2015 Electric Sheep Fencing LLC 
	Copyright (C) 2004 Scott Ullrich
	All rights reserved.
	
	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:
	
	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.
	
	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.
	
	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/

require_once("functions.inc");
require_once("config.inc");
require_once("notices.inc");
require_once("openvpn.inc");
require_once("interfaces.inc");

$fp = fopen("/etc/rc.carpmaster", "r");
flock($fp, LOCK_EX);  // get exklusive lock

if (isset($_GET))
	$argument = $_GET['interface'];
else
	$argument = str_replace("\n", "", $argv[1]);
if (!strstr($argument, "@"))
	log_error("Carp MASTER event triggered from wrong source {$argument}");

list($vhid, $iface) = explode("@", $argument);

$friendly = convert_real_interface_to_friendly_interface_name($iface);
$carp_iface = "{$friendly}_vip${vhid}";
$friendly_descr = convert_friendly_interface_to_friendly_descr($carp_iface);
$notificationmsg = sprintf('Carp cluster member "%2$s (%1$s)" has resumed the state "MASTER" for vhid %s', $argument, $friendly_descr, $vhid);

notify_via_smtp($notificationmsg);
notify_via_growl($notificationmsg);
log_error($notificationmsg);

/* Start OpenVPN clients running on this VIP */
global $config;
// get all gateway groups specifying CARP IPs only once
$a_groups = return_gateway_groups_array();
if (is_array($config['openvpn']) && is_array($config['openvpn']['openvpn-client'])) {
	foreach ($config['openvpn']['openvpn-client'] as $settings) {
		// check if the openvpn client runs on the CARP IP
		if ($settings['interface'] == $carp_iface) {
			log_error("Starting OpenVPN client instance \"{$settings['description']}\" on {$friendly_descr} because of transition to CARP master.");
			openvpn_restart('client', $settings);
			// client restarted, go to the next client settings
			continue;
		}
		// check for gateway groups specifying CARP IPs
		$current_group = $a_groups[$settings['interface']];
		if (is_array($current_group)) {
			foreach ($current_group as $gateway) { 
				if ($gateway[vip] == $carp_iface) {
					log_error("Starting OpenVPN client instance \"{$settings['description']}\" on {$friendly_descr} because of transition to CARP master.");
					openvpn_restart('client', $settings);
					// client restarted, go to the next client settings
					break;
				}
			}
		}
	}
}

/* Start OpenVPN servers running on this VIP */
if (is_array($config['openvpn']) && is_array($config['openvpn']['openvpn-server'])) {
	foreach ($config['openvpn']['openvpn-server'] as $settings) {
		// check if the openvpn server runs on the CARP IP
		if ($settings['interface'] == $carp_iface) {
			log_error("Starting OpenVPN server instance \"{$settings['description']}\" on {$friendly_descr} because of transition to CARP master.");
			openvpn_restart('server', $settings);
			// client restarted, go to the next client settings
			continue;
		}
		// check for gateway groups specifying CARP IPs
		$current_group = $a_groups[$settings['interface']];
		if (is_array($current_group)) {
			foreach ($current_group as $gateway) { 
				if ($gateway[vip] == $carp_iface) {
					log_error("Starting OpenVPN server instance \"{$settings['description']}\" on {$friendly_descr} because of transition to CARP master.");
						openvpn_restart('server', $settings);
					// client restarted, go to the next client settings
					break;
				}
			}
		}
	}
}

/* Reconfigure radvd when necessary */
if (isset($config['dhcpdv6']) && is_array($config['dhcpdv6'])) {
	$found = false;
	foreach ($config['dhcpdv6'] as $dhcpv6if => $dhcpv6ifconf) {
		if ($dhcpv6ifconf['rainterface'] != $carp_iface)
			continue;

		$found = true;
		break;
	}

	if ($found === true)
		services_radvd_configure();
}

$pluginparams = array();
$pluginparams['type'] = 'carp';
$pluginparams['event'] = 'rc.carpmaster';
$pluginparams['interface'] = $argument;
pkg_call_plugins('plugin_carp', $pluginparams);

flock($fp, LOCK_UN); // release lock

?>