#!/usr/local/bin/php
<?php

/*
        Copyright (C) 2004-2006 Scott Ullrich
        Copyright (C) 2005 Bill Marquette
        Copyright (C) 2006 Peter Allgeyer
        Copyright (C) 2008 Ermal Luci
        Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
        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("config.inc");
require_once("filter.inc");
require_once("util.inc");
require_once("interfaces.inc");
require_once("XMLRPC_Client.inc") ;
require_once("util.inc");

/*
 *  backup_vip_config_section($section): returns as an xml file string of
 *                                   the configuration section
 */
function backup_vip_config_section() {
	global $config;

	if (!is_array($config['virtualip']['vip']))
		return;
	$temp = array();
	$temp['vip'] = array();
	foreach($config['virtualip']['vip'] as $section) {
		if ($section['mode'] != "carp")
			continue;
		if ($section['advskew'] <> "") {
			$section_val = intval($section['advskew']);
			$section_val=$section_val+100;
			if ($section_val > 254)
				$section_val = 254;
			$section['advskew'] = $section_val;
		}
		if ($section['advbase'] <> "") {
			$section_val = intval($section['advbase']);
			if ($section_val > 254)
				$section_val = 254;
			$section['advbase'] = $section_val;
		}
		$temp['vip'][] = $section;
	}
	return $temp;
}

function remove_special_characters($string) {
	$match_array = "";
	preg_match_all("/[a-zA-Z0-9\_\-]+/",$string,$match_array);
	$string = "";
	foreach ($match_array[0] as $ma) {
		if ($string <> "")
			$string .= " ";
		$string .= $ma;
	}
	return $string;
}

function carp_check_version($url, $username, $password, $method = 'opnsense.firmware_version') {
	global $config, $g;

	if (file_exists('/var/run/booting')) {
		return;
	}


	$client = new SimpleXMLRPC_Client($url,240);
	$client->setCredentials($username, $password);
	if ($client->query($method)) {
	    $remote_version = $client->getResponse();
	} else {
            // propagate error to log
            $error = "An error occurred while attempting XMLRPC sync with username {$username} and {$url} " .  $client->error ;
	    log_error($error);
            file_notice("sync_settings", $error, "Settings Sync", "");
	    // print communication details on failure
	    echo $client->getDetails();
            return false ;
	}

	if (!is_array($remote_version) && trim($remote_version) == "Authentication failed") {
		$error = "An authentication failure occurred while trying to access {$url} ({$method}).";
		log_error($error);
		file_notice("sync_settings", $error, "Settings Sync", "");
		exit;
	}

	if (!isset($remote_version['config_version']) ||
		$remote_version['config_version'] < $config['version']) {
		update_filter_reload_status("The other member is on older configuration version of {$g['product_name']}. Sync will not be done to prevent problems!");
		log_error("The other member is on older configuration version of {$g['product_name']}. Sync will not be done to prevent problems!");
		return false;
	} else {
		return true;
	}

}

function carp_sync_xml($url, $username, $password, $sections, $method = 'opnsense.restore_config_section') {
	global $config, $g;

	if (file_exists('/var/run/booting')) {
		return;
	}

	update_filter_reload_status("Syncing CARP data to {$url}");

	/* make a copy of config */
	$config_copy = $config;

	/* strip out nosync items */
	if (is_array($config_copy['nat']) && is_array($config_copy['nat']['outbound']['rule'])) {
		$rulescnt = count($config_copy['nat']['outbound']['rule']);
		for ($x = 0; $x < $rulescnt; $x++) {
			$config_copy['nat']['outbound']['rule'][$x]['descr'] = remove_special_characters($config_copy['nat']['outbound']['rule'][$x]['descr']);
			if (isset ($config_copy['nat']['outbound']['rule'][$x]['nosync']))
				unset ($config_copy['nat']['outbound']['rule'][$x]);
		}
	}
	if (is_array($config_copy['nat']) && is_array($config_copy['nat']['rule'])) {
		$natcnt = count($config_copy['nat']['rule']);
		for ($x = 0; $x < $natcnt; $x++) {
			$config_copy['nat']['rule'][$x]['descr'] = remove_special_characters($config_copy['nat']['rule'][$x]['descr']);
			if (isset ($config_copy['nat']['rule'][$x]['nosync']))
				unset ($config_copy['nat']['rule'][$x]);
		}
	}
	if (is_array($config_copy['filter']) && is_array($config_copy['filter']['rule'])) {
		$filtercnt = count($config_copy['filter']['rule']);
		for ($x = 0; $x < $filtercnt; $x++) {
			$config_copy['filter']['rule'][$x]['descr'] = remove_special_characters($config_copy['filter']['rule'][$x]['descr']);
			if (isset ($config_copy['filter']['rule'][$x]['nosync']))
				unset ($config_copy['filter']['rule'][$x]);
		}
	}
	if (isset($config_copy['aliases']) && is_array($config_copy['aliases']) && is_array($config_copy['aliases']['alias'])) {
		$aliascnt = count($config_copy['aliases']['alias']);
		for ($x = 0; $x < $aliascnt; $x++) {
			$config_copy['aliases']['alias'][$x]['descr'] = remove_special_characters($config_copy['aliases']['alias'][$x]['descr']);
			if (isset ($config_copy['aliases']['alias'][$x]['nosync']))
				unset ($config_copy['aliases']['alias'][$x]);
		}
	}
	if (is_array($config_copy['dnsmasq']) && is_array($config_copy['dnsmasq']['hosts'])) {
		$dnscnt = count($config_copy['dnsmasq']['hosts']);
		for ($x = 0; $x < $dnscnt; $x++) {
			$config_copy['dnsmasq']['hosts'][$x]['descr'] = remove_special_characters($config_copy['dnsmasq']['hosts'][$x]['descr']);
			if (isset ($config_copy['dnsmasq']['hosts'][$x]['nosync']))
				unset ($config_copy['dnsmasq']['hosts'][$x]);
		}
	}
	if (isset($config_copy['ipsec']) && is_array($config_copy['ipsec']) && is_array($config_copy['ipsec']['tunnel'])) {
		$ipseccnt = count($config_copy['ipsec']['tunnel']);
		for ($x = 0; $x < $ipseccnt; $x++) {
			$config_copy['ipsec']['tunnel'][$x]['descr'] = remove_special_characters($config_copy['ipsec']['tunnel'][$x]['descr']);
			if (isset ($config_copy['ipsec']['tunnel'][$x]['nosync']))
				unset ($config_copy['ipsec']['tunnel'][$x]);
		}
	}

	if (is_array($config_copy['dhcpd'])) {
		foreach($config_copy['dhcpd'] as $dhcpif => $dhcpifconf) {
			if($dhcpifconf['failover_peerip'] <> "") {
				$int = guess_interface_from_ip($dhcpifconf['failover_peerip']);
				$intip = find_interface_ip($int);
				$config_copy['dhcpd'][$dhcpif]['failover_peerip'] = $intip;
			}
		}
	}

	foreach ($sections as $section) {
	   /*  we can't use array_intersect_key()
		*  due to the vip 'special case'
		*/
		switch ($section) {
			case 'virtualip':
				$xml[$section] = backup_vip_config_section();
				break;
			case 'user':
				$xml['system'][$section] = $config_copy['system'][$section];
				$xml['system']['nextuid'] = $config_copy['system']['nextuid'];
				break;
			case 'group':
				$xml['system'][$section] = $config_copy['system'][$section];
				$xml['system']['nextgid'] = $config_copy['system']['nextgid'];
				break;
			case 'authserver':
				$xml['system'][$section] = $config_copy['system'][$section];
			default:
				$xml[$section] = $config_copy[$section];
		}
	}


	$client = new SimpleXMLRPC_Client($url,240);
	$client->setCredentials($username, $password);
	if ($client->query($method, $xml)) {
	    $response = $client->getResponse();
	} else {
            // propagate error to log
            $error = "An error occurred while attempting XMLRPC sync with username {$username} and {$url} " .  $client->error ;
	    log_error($error);
            file_notice("sync_settings", $error, "Settings Sync", "");
	    // print communication details on failure
	    echo $client->getDetails();
            return false ;
	}

	if (!is_array($response) && trim($response) == "Authentication failed") {
		$error = "An authentication failure occurred while trying to access {$url} ({$method}).";
		log_error($error);
		file_notice("sync_settings", $error, "Settings Sync", "");
		exit;
	}

	return true;
}

global $g;

if (file_exists('/var/run/booting')) {
        return;
}

if (is_array($config['hasync'])) {
	$sections = array();
	update_filter_reload_status("Building high availability information");
	$hasync = $config['hasync'];

	if (empty($hasync['synchronizetoip'])) {
		log_error("Config sync not being done because of missing sync IP (this is normal on secondary systems).");
		exit;
	}
	if(is_ipaddrv6($hasync['synchronizetoip']))
		$hasync['synchronizetoip'] = "[{$hasync['synchronizetoip']}]";

	/*
	* XXX: The way we're finding the port right now is really suboptimal -
	*     we can't assume that the other machine is setup identically.
	*/
	if (!empty($config['system']['webgui']['protocol'])) {
		$port = $config['system']['webgui']['port'];
		if (!empty($port)) {
			$synchronizeto =  $config['system']['webgui']['protocol'] . '://'.$hasync['synchronizetoip'].':'.$port."/xmlrpc.php";
		} else {
			$synchronizeto =  $config['system']['webgui']['protocol'] . '://'.$hasync['synchronizetoip']."/xmlrpc.php" ;
		}
	}


	if (isset($hasync['synchronizerules'])) {
		if (!is_array($config['filter']))
			$config['filter'] = array();
		$sections[] = 'filter';
	}
	if (isset($hasync['synchronizenat'])) {
		if (!is_array($config['nat']))
			$config['nat'] = array();
		$sections[] = 'nat';
	}
	if (isset($hasync['synchronizealiases'])) {
		if (!isset($config['aliases']) || !is_array($config['aliases'])) {
			$config['aliases'] = array();
		}
		$sections[] = 'aliases';
	}
	if (isset($hasync['synchronizedhcpd']) && is_array($config['dhcpd']))
		$sections[] = 'dhcpd';
	if (isset($hasync['synchronizewol'])) {
		if (!is_array($config['wol']))
			$config['wol'] = array();
		$sections[] = 'wol';
	}
	if (isset($hasync['synchronizestaticroutes'])) {
		if (!is_array($config['staticroutes']))
			$config['staticroutes'] = array();
		if (!isset($config['staticroutes']['route']) || !is_array($config['staticroutes']['route']))
			$config['staticroutes']['route'] = array();
		$sections[] = 'staticroutes';
		if (!is_array($config['gateways']))
			$config['gateways'] = array();
		$sections[] = 'gateways';
	}
	if (isset($hasync['synchronizevirtualip'])) {
		if (!isset($config['virtualip']) || !is_array($config['virtualip']))
			$config['virtualip'] = array();
		$sections[] = 'virtualip';
	}
	if (isset($hasync['synchronizelb'])) {
		if (!is_array($config['load_balancer']))
			$config['load_balancer'] = array();
		$sections[] = 'load_balancer';
	}
	if (isset($hasync['synchronizeipsec'])) {
		if (!isset($config['ipsec']) || !is_array($config['ipsec'])) {
			$config['ipsec'] = array();
		}
		$sections[] = 'ipsec';
	}
	if (isset($hasync['synchronizeopenvpn'])) {
		if (!isset($config['openvpn']) || !is_array($config['openvpn']))
			$config['openvpn'] = array();
		$sections[] = 'openvpn';
	}
	if (isset($hasync['synchronizecerts']) || isset($hasync['synchronizeopenvpn'])) {
		if (!is_array($config['cert']))
			$config['cert'] = array();
		$sections[] = 'cert';

		if (!is_array($config['ca']))
			$config['ca'] = array();
		$sections[] = 'ca';

		if (!isset($config['crl']) || !is_array($config['crl']))
			$config['crl'] = array();
		$sections[] = 'crl';
	}
	if (isset($hasync['synchronizeusers'])) {
		$sections[] = 'user';
		$sections[] = 'group';
	}
	if (isset($hasync['synchronizeauthservers'])) {
		$sections[] = 'authserver';
	}
	if (isset($hasync['synchronizednsforwarder']) && is_array($config['dnsmasq']))
		$sections[] = 'dnsmasq';
	if (isset($hasync['synchronizeschedules']) || isset($hasync['synchronizerules'])) {
		if (!isset($config['schedules']) || !is_array($config['schedules']))
			$config['schedules'] = array();
		$sections[] = 'schedules';
	}

	if (count($sections) <= 0) {
		log_error("Nothing has been configured to be synched. Skipping....");
		exit;
	}

	if (empty($hasync['username']))
		$username = "admin";
	else
		$username = $hasync['username'];

	if (!carp_check_version($synchronizeto, $username, $hasync['password']))
		exit;

	update_filter_reload_status("Signaling CARP reload signal...");
	carp_sync_xml($synchronizeto, $username, $hasync['password'], $sections);

	if (count($argv) <= 1 || $argv[1] != 'restart' ) {
		// only sync data, no reload
		// TODO: config sync probably needs more thinking, but when we always force a reload
		// TODO: the machine tends to get sloppy
		exit;
	}
	$client = new SimpleXMLRPC_Client($synchronizeto,240);
	$client->setCredentials($username, $hasync['password']);
	if ($client->query("opnsense.filter_configure")) {
	    $response = $client->getResponse();
	} else {
            // propagate error to log
            $error = "An error occurred while attempting XMLRPC sync with username {$username} and {$url} " .  $client->error ;
	    log_error($error);
            file_notice("sync_settings", $error, "Settings Sync", "");
	    // print communication details on failure
	    echo $client->getDetails();
            return false ;
	}

	if (!is_array($response) && trim($response) == "Authentication failed") {
		$error = "An authentication failure occurred while trying to access {$url} ({$method}).";
		log_error($error);
		file_notice("sync_settings", $error, "Settings Sync", "");
		exit;
	}



	log_error("Filter sync successfully completed with {$synchronizetoip}:{$port}.");
}