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#!/usr/local/bin/php-cgi -f
<?php
/*
 * rc.carpmaster
 *
 * part of pfSense (https://www.pfsense.org)
 * Copyright (c) 2004-2016 Electric Sheep Fencing, LLC
 * 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.
 *
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgment:
 *    "This product includes software developed by the pfSense Project
 *    for use in the pfSense® software distribution. (http://www.pfsense.org/).
 *
 * 4. The names "pfSense" and "pfSense Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    coreteam@pfsense.org.
 *
 * 5. Products derived from this software may not be called "pfSense"
 *    nor may "pfSense" appear in their names without prior written
 *    permission of the Electric Sheep Fencing, LLC.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *
 * "This product includes software developed by the pfSense Project
 * for use in the pfSense software distribution (http://www.pfsense.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE pfSense PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 pfSense PROJECT OR
 * ITS CONTRIBUTORS 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");

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

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

$friendly = convert_real_interface_to_friendly_interface_name($iface);
$friendly_descr = convert_friendly_interface_to_friendly_descr($friendly);
$vips = link_interface_to_vips($friendly, '', $vhid);
if (!is_array($vips)) {
	log_error("CARP master event triggered from wrong source {$argument} - no associated VIPs");
	exit;
}
foreach ($vips as $vip) {
	$notificationmsg = sprintf('HA cluster member "(%1$s@%2$s): (%3$s)" has resumed CARP state "MASTER" for vhid %4$s',
	    $vip['subnet'], $iface, $friendly_descr, $vhid);

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

/* Start OpenVPN clients running on this VIP, since they should be in the stopped state while the VIP is CARP Backup. */
global $config;
$a_groups = return_gateway_groups_array();
if (is_array($config['openvpn']) && is_array($config['openvpn']['openvpn-client'])) {
	foreach ($config['openvpn']['openvpn-client'] as $settings) {
		if (substr($settings['interface'], 0, 4) == '_vip') {
			$openvpn_vip = $settings['interface'];
		} else if (is_array($a_groups[$settings['interface']])) {
			// interface is a gateway group, check CARP VIP
			if (substr($a_groups[$settings['interface']][0]['vip'], 0, 4) == '_vip') {
				$openvpn_vip = $a_groups[$settings['interface']][0]['vip'];
			}
		} else {
			// this OpenVPN instance not on a CARP IP
			continue;
		}
		foreach ($vips as $vip) {
			if ($openvpn_vip == "_vip{$vip['uniqid']}") {
				log_error("Starting OpenVPN client instance on {$friendly_descr} because of transition to CARP master.");
				openvpn_restart('client', $settings);
			}
		}
	}
}
if (is_array($config['openvpn']) && is_array($config['openvpn']['openvpn-server'])) {
	foreach ($config['openvpn']['openvpn-server'] as $settings) {
		foreach ($vips as $vip) {
			if ($settings['interface'] == "_vip{$vip['uniqid']}") {
				log_error("Starting OpenVPN instance on {$friendly_descr} because of transition to CARP master.");
				openvpn_restart('server', $settings);
			}
		}
	}
}

/* Reconfigure radvd when necessary */
if (isset($config['dhcpdv6']) && is_array($config['dhcpdv6'])) {
	$rafound = false;
	foreach ($config['dhcpdv6'] as $dhcpv6if => $dhcpv6ifconf) {
		foreach ($vips as $vip) {
			if ($dhcpv6ifconf['rainterface'] == "_vip{$vip['uniqid']}") {
				log_error("Starting radvd instance on {$friendly_descr} because of transition to CARP master.");
				$rafound = true;
			}
		}
	}
	if ($rafound) {
		services_radvd_configure();
	}
}

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

?>
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