<?php
/*
	filter.inc

	part of pfSense (https://www.pfsense.org)
	Copyright (c) 2005 Bill Marquette
	Copyright (c) 2006 Peter Allgeyer
	Copyright (c) 2008-2016 Electric Sheep Fencing, LLC. All rights reserved.

	originally part of m0n0wall (http://m0n0.ch/wall)
	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.

	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.
*/


/* holds the items that will be executed *AFTER* the filter is fully loaded */
$after_filter_configure_run = array();

/* For installing cron job of schedules */
$time_based_rules = false;

/* Used to hold the interface list that will be used on ruleset creation. */
$FilterIflist = array();

/* Create a global array to avoid errors on rulesets. */
$GatewaysList = array();

/* Used for the hostname dns resolver */
$filterdns = array();

/* Used for aliases and interface macros */
$aliases = "";

/* ICMP v4 types */
$icmptypes = array(
	""		=> gettext("any"),
	"echoreq"	=> gettext("Echo request"),
	"echorep"	=> gettext("Echo reply"),
	"unreach"	=> gettext("Destination unreachable"),
	"squench"	=> gettext("Source quench"),
	"redir"		=> gettext("Redirect"),
	"althost"	=> gettext("Alternate Host"),
	"routeradv"	=> gettext("Router advertisement"),
	"routersol"	=> gettext("Router solicitation"),
	"timex"		=> gettext("Time exceeded"),
	"paramprob"	=> gettext("Invalid IP header"),
	"timereq"	=> gettext("Timestamp"),
	"timerep"	=> gettext("Timestamp reply"),
	"inforeq"	=> gettext("Information request"),
	"inforep"	=> gettext("Information reply"),
	"maskreq"	=> gettext("Address mask request"),
	"maskrep"	=> gettext("Address mask reply"),
	"trace"		=> gettext("Traceroute"),
	"dataconv"	=> gettext("Datagram conversion error"),
	"mobredir"	=> gettext("Mobile host redirect"),
	"ipv6-where"	=> gettext("IPv6 where-are-you"),
	"ipv6-here"	=> gettext("IPv6 I-am-here"),
	"mobregreq"	=> gettext("Mobile registration request"),
	"mobregrep"	=> gettext("Mobile registration reply"),
	"skip"		=> gettext("SKIP"),
	"photuris"	=> gettext("Photuris")
);

/* ICMP v6 types */
$icmp6types = array(
	""		=> gettext("any"),
	"unreach"	=> gettext("Destination unreachable"),
	"toobig"	=> gettext("Packet too big"),
	"timex"		=> gettext("Time exceeded"),
	"paramprob"	=> gettext("Parameter problem"),
	"echoreq"	=> gettext("Echo request"),
	"echorep"	=> gettext("Echo reply"),
	"groupqry"	=> gettext("Group membership query"),
	"listqry"	=> gettext("Multicast listener query"),
	"grouprep"	=> gettext("Group membership report"),
	"listenrep"	=> gettext("Multicast listener report"),
	"groupterm"	=> gettext("Group membership termination"),
	"listendone"	=> gettext("Multicast listener done"),
	"routersol"	=> gettext("Router solicitation"),
	"routeradv"	=> gettext("Router advertisement"),
	"neighbrsol"	=> gettext("Neighbor solicitation"),
	"neighbradv"	=> gettext("Neighbor advertisement"),
	"redir"		=> gettext("Redirect"),
	"routrrenum"	=> gettext("Router renumbering"),
	"wrureq"	=> gettext("Who are you request"),
	"wrurep"	=> gettext("Who are you reply"),
	"fqdnreq"	=> gettext("FQDN query"),
	"fqdnrep"	=> gettext("FQDN reply"),
	"niqry"		=> gettext("Node information request"),
	"nirep"		=> gettext("Node information reply"),
	"mtraceresp"	=> gettext("mtrace resp"),
	"mtrace"	=> gettext("mtrace messages")
);

/*
 * Fixed tracker values (used to group and track usage in GUI):
 *
 * anti-lockout rules:	10000
 * bogons rules:	11000
 * RFC1918 rules:	12000
 *
 */

define("ANTILOCKOUT_TRACKER", 10000);
define("BOGONS_TRACKER", 11000);
define("RFC1918_TRACKER", 12000);

$tracker = 1000000000;
$negate_tracker = 10000000;

function filter_rule_tracker($tracker) {
	global $tracker;

	return (++$tracker);
}

function filter_negaterule_tracker() {
        global $negate_tracker;

        ++$negate_tracker;
        return "tracker {$negate_tracker} ";
}

function fix_rule_label($descr) {
	$descr = str_replace('"', '', $descr);
	if (strlen($descr) > 63) {
		return substr($descr, 0, 60) . "...";
	} else {
		return $descr;
	}
}

function is_bogonsv6_used() {
	global $config, $g;
	# Only use bogonsv6 table if IPv6 Allow is on, and at least 1 enabled interface also has "blockbogons" enabled.
	$usebogonsv6 = false;
	if (isset($config['system']['ipv6allow'])) {
		foreach ($config['interfaces'] as $ifacedata) {
			if (isset($ifacedata['enable']) && isset($ifacedata['blockbogons'])) {
				$usebogonsv6 = true;
				break;
			}
		}
	}
	return $usebogonsv6;
}

function filter_pflog_start($kill_first = false) {
	global $config, $g;

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_pflog_start() being called $mt\n";
	}
	if ((!file_exists("{$g['varrun_path']}/filterlog.pid")) ||
	    (!isvalidpid("{$g['varrun_path']}/filterlog.pid"))) {
		mwexec("/usr/local/sbin/filterlog -i pflog0 -p {$g['varrun_path']}/filterlog.pid");
	}
}

/* reload filter async */
function filter_configure() {
	global $g;

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_configure() being called $mt\n";
	}

	/*
	 * NOTE: Check here for bootup status since this should not be triggered during bootup.
	 *	 The reason is that rc.bootup calls filter_configure_sync directly which does this too.
	 */
	if (!platform_booting()) {
		send_event("filter reload");
	}
}

function filter_delete_states_for_down_gateways() {
	global $config, $GatewaysList;

	if (!isset($config['system']['gw_down_kill_states'])) {
		return;
	}

	$any_gateway_down = false;
	$a_gateways = return_gateways_status();
	if (is_array($GatewaysList)) {
		foreach ($GatewaysList as $gwname => $gateway) {
			if (empty($gateway['monitor'])) {
				continue;
			}
			if (!is_ipaddr($gateway['monitor'])) {
				continue;
			}
			if (strstr($gateway['monitor'], "127.0.0.")) {
				continue;
			}
			if (empty($a_gateways[$gateway['monitor']])) {
				continue;
			}
			$gwstatus =& $a_gateways[$gateway['monitor']];
			if (strstr($gwstatus['status'], "down")) {
				$any_gateway_down = true;
				break;
			}
		}
	}
	if ($any_gateway_down == true) {
		mwexec("/sbin/pfctl -Fs");
	}
}

/* reload filter sync */
function filter_configure_sync($delete_states_if_needed = true) {
	global $config, $g, $after_filter_configure_run, $FilterIflist;
	global $time_based_rules, $filterdns, $aliases, $dummynet_name_list;

	/* Use filter lock to not allow concurrent filter reloads during this run. */
	$filterlck = lock('filter', LOCK_EX);

	filter_pflog_start();
	update_filter_reload_status(gettext("Initializing"));

	/* invalidate interface cache */
	get_interface_arr(true);

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_configure_sync() being called $mt\n";
	}
	/* Get interface list to work with. */
	filter_generate_optcfg_array();
	if (platform_booting() == true) {
		echo gettext("Configuring firewall");
	}

	/* generate aliases */
	if (platform_booting() == true) {
		echo ".";
	}
	update_filter_reload_status(gettext("Creating aliases"));
	$aliases = filter_generate_aliases();
	$gateways = filter_generate_gateways();
	if (platform_booting() == true) {
		echo ".";
	}
	update_filter_reload_status(gettext("Generating Limiter rules"));
	$dummynet_rules = filter_generate_dummynet_rules();
	$dummynet_name_list = get_unique_dnqueue_list();
	update_filter_reload_status(gettext("Generating NAT rules"));
	/* generate nat rules */
	$natrules = filter_nat_rules_generate();
	if (platform_booting() == true) {
		echo ".";
	}
	update_filter_reload_status(gettext("Generating filter rules"));
	/* generate pfctl rules */
	$pfrules = filter_rules_generate();
	/* generate altq, limiter */
	if (platform_booting() == true) {
		echo ".";
	}
	update_filter_reload_status(gettext("Generating ALTQ queues"));
	$altq_queues = filter_generate_altq_queues();
	if (platform_booting() == true) {
		echo ".";
	}
	update_filter_reload_status(gettext("Loading filter rules"));
	/* enable pf if we need to, otherwise disable */
	if (!isset ($config['system']['disablefilter'])) {
		mwexec("/sbin/pfctl -e", true);
	} else {
		mwexec("/sbin/pfctl -d", true);
		unlink_if_exists("{$g['tmp_path']}/filter_loading");
		update_filter_reload_status(gettext("Filter is disabled.  Not loading rules."));
		if (platform_booting() == true) {
			echo gettext("done.") . "\n";
		}
		unlock($filterlck);
		return;
	}

	$limitrules = "";
	/* User defined maximum table entries in Advanced menu. */
	if ($config['system']['maximumtableentries'] <> "" && is_numeric($config['system']['maximumtableentries'])) {
		$limitrules .= "set limit table-entries {$config['system']['maximumtableentries']}\n";
	}

	if ($config['system']['optimization'] <> "") {
		$limitrules .= "set optimization {$config['system']['optimization']}\n";
		if ($config['system']['optimization'] == "conservative") {
			$limitrules .= "set timeout { udp.first 300, udp.single 150, udp.multiple 900 }\n";
		}
	} else {
		$limitrules .= "set optimization normal\n";
	}

	$timeoutlist = "";
	if (isset($config['system']['tcpfirsttimeout']) && is_numericint($config['system']['tcpfirsttimeout'])) {
		$timeoutlist .= " tcp.first {$config['system']['tcpfirsttimeout']} ";
	}
	if (isset($config['system']['tcpopeningtimeout']) && is_numericint($config['system']['tcpopeningtimeout'])) {
		$timeoutlist .= " tcp.opening {$config['system']['tcpopeningtimeout']} ";
	}
	if (isset($config['system']['tcpestablishedtimeout']) && is_numericint($config['system']['tcpestablishedtimeout'])) {
		$timeoutlist .= " tcp.established {$config['system']['tcpestablishedtimeout']} ";
	}
	if (isset($config['system']['tcpclosingtimeout']) && is_numericint($config['system']['tcpclosingtimeout'])) {
		$timeoutlist .= " tcp.closing {$config['system']['tcpclosingtimeout']} ";
	}
	if (isset($config['system']['tcpfinwaittimeout']) && is_numericint($config['system']['tcpfinwaittimeout'])) {
		$timeoutlist .= " tcp.finwait {$config['system']['tcpfinwaittimeout']} ";
	}
	if (isset($config['system']['tcpclosedtimeout']) && is_numericint($config['system']['tcpclosedtimeout'])) {
		$timeoutlist .= " tcp.closed {$config['system']['tcpclosedtimeout']} ";
	}
	if (isset($config['system']['udpfirsttimeout']) && is_numericint($config['system']['udpfirsttimeout'])) {
		$timeoutlist .= " udp.first {$config['system']['udpfirsttimeout']} ";
	}
	if (isset($config['system']['udpsingletimeout']) && is_numericint($config['system']['udpsingletimeout'])) {
		$timeoutlist .= " udp.single {$config['system']['udpsingletimeout']} ";
	}
	if (isset($config['system']['udpmultipletimeout']) && is_numericint($config['system']['udpmultipletimeout'])) {
		$timeoutlist .= " udp.multiple {$config['system']['udpmultipletimeout']} ";
	}
	if (isset($config['system']['icmpfirsttimeout']) && is_numericint($config['system']['icmpfirsttimeout'])) {
		$timeoutlist .= " icmp.first {$config['system']['icmpfirsttimeout']} ";
	}
	if (isset($config['system']['icmperrortimeout']) && is_numericint($config['system']['icmperrortimeout'])) {
		$timeoutlist .= " icmp.error {$config['system']['icmperrortimeout']} ";
	}
	if (isset($config['system']['otherfirsttimeout']) && is_numericint($config['system']['otherfirsttimeout'])) {
		$timeoutlist .= " other.first {$config['system']['otherfirsttimeout']} ";
	}
	if (isset($config['system']['othersingletimeout']) && is_numericint($config['system']['othersingletimeout'])) {
		$timeoutlist .= " other.single {$config['system']['othersingletimeout']} ";
	}
	if (isset($config['system']['othermultipletimeout']) && is_numericint($config['system']['othermultipletimeout'])) {
		$timeoutlist .= " other.multiple {$config['system']['othermultipletimeout']} ";
	}

	if ($timeoutlist <> "") {
		$limitrules .= "set timeout { $timeoutlist }\n";
	}

	if (!empty($config['system']['adaptivestart']) && !empty($config['system']['adaptiveend'])) {
		$limitrules .= "set timeout { adaptive.start {$config['system']['adaptivestart']}, adaptive.end {$config['system']['adaptiveend']} }\n";
	}

	if ($config['system']['maximumstates'] <> "" && is_numeric($config['system']['maximumstates'])) {
		/* User defined maximum states in Advanced menu. */
		$limitrules .= "set limit states {$config['system']['maximumstates']}\n";
		$limitrules .= "set limit src-nodes {$config['system']['maximumstates']}\n";
	} else {
		$max_states = pfsense_default_state_size();
		$limitrules .= "set limit states {$max_states}\n";
		$limitrules .= "set limit src-nodes {$max_states}\n";
	}

	/* Frag limit. pf default is 5000 */
	if ($config['system']['maximumfrags'] <> "" && is_numeric($config['system']['maximumfrags'])) {
		$limitrules .= "set limit frags {$config['system']['maximumfrags']}\n";
	}

	if (isset($config['system']['lb_use_sticky']) && is_numeric($config['system']['srctrack']) && ($config['system']['srctrack'] > 0)) {
		$limitrules .= "set timeout src.track {$config['system']['srctrack']}\n";
	}

	$rules = "";
	$rules = "{$limitrules}\n";
	$rules .= "{$aliases} \n";
	$rules .= "{$gateways} \n";
	update_filter_reload_status(gettext("Setting up logging information"));
	$rules .= filter_setup_logging_interfaces();
	$rules .= "\n";
	$rules .= "set skip on pfsync0\n";
	$rules .= "\n";
	update_filter_reload_status(gettext("Setting up SCRUB information"));
	$rules .= filter_generate_scrubing();
	$rules .= "\n";
	$rules .= "{$altq_queues}\n";
	$rules .= "{$natrules}\n";
	$rules .= "{$pfrules}\n";
	$rules .= discover_pkg_rules("filter");

	unset($aliases, $gateways, $altq_queues, $natrules, $pfrules);

	// Copy rules.debug to rules.debug.old
	if (file_exists("{$g['tmp_path']}/rules.debug")) {
		@copy("{$g['tmp_path']}/rules.debug", "{$g['tmp_path']}/rules.debug.old");
	}

	if (!@file_put_contents("{$g['tmp_path']}/rules.debug", $rules, LOCK_EX)) {
		log_error("WARNING: Could not write new rules!");
		unlock($filterlck);
		return;
	}

	@file_put_contents("{$g['tmp_path']}/rules.limits", $limitrules);
	mwexec("/sbin/pfctl -Of {$g['tmp_path']}/rules.limits");
	unset($rules, $limitrules);

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "pfctl being called at $mt\n";
	}
	unset($rules_loading, $rules_error);
	$_grbg = exec("/sbin/pfctl -o basic -f {$g['tmp_path']}/rules.debug 2>&1", $rules_error, $rules_loading);
	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "pfctl done at $mt\n";
	}
	/*
	 * check for a error while loading the rules file.	if an error has occurred
	 * then output the contents of the error to the caller
	 */
	if ($rules_loading <> 0) {
		foreach ($rules_error as $errorline) {
			$saved_line_error = $errorline;
			$line_error = explode(":", $errorline);
			$line_number = $line_error[1];
			$line_split = file("{$g['tmp_path']}/rules.debug");
			if (is_array($line_split)) {
				$line_error = sprintf(gettext('The line in question reads [%1$d]: %2$s'), $line_number, $line_split[$line_number-1]);
			}
			unset($line_split);

			/* Brutal ugly hack but required -- PF is stuck, unwedge */
			if (strstr("$rules_error[0]", "busy")) {
				exec("/sbin/pfctl -d; /sbin/pfctl -e; /sbin/pfctl -f {$g['tmp_path']}/rules.debug");
				$error_msg = gettext("PF was wedged/busy and has been reset.");
				file_notice("pf_busy", $error_msg, "pf_busy", "");
			} else {
				$_grbg = exec("/sbin/pfctl -o basic -f {$g['tmp_path']}/rules.debug.old 2>&1");
			}
			if ($line_error and $line_number) {
				file_notice("filter_load", sprintf(gettext('There were error(s) loading the rules: %1$s - %2$s'), $saved_line_error, $line_error), "Filter Reload", "");
				update_filter_reload_status(sprintf(gettext('There were error(s) loading the rules: %1$s - %2$s'), $saved_line_error, $line_error));
				unlock($filterlck);
				return;
			}
		}
		unset($rules_loading, $rules_error);
	}

	# If we are not using bogonsv6 then we can remove any bogonsv6 table from the running pf (if the table is not there, the kill is still fine).
	if (!is_bogonsv6_used()) {
		$_grbg = exec("/sbin/pfctl -t bogonsv6 -T kill 2>/dev/null");
	}

	if (!platform_booting()) {
		if (!empty($filterdns)) {
			@file_put_contents("{$g['varetc_path']}/filterdns.conf", implode("", $filterdns));
			unset($filterdns);
			if (isvalidpid("{$g['varrun_path']}/filterdns.pid")) {
				sigkillbypid("{$g['varrun_path']}/filterdns.pid", "HUP");
			} else {
				/*
				 * FilterDNS has three debugging levels. The default chosen is 1.
				 * Available are level 2 and greater then 2.
				 */
				if (isset($config['system']['aliasesresolveinterval']) && is_numeric($config['system']['aliasesresolveinterval'])) {
					$resolve_interval = $config['system']['aliasesresolveinterval'];
				} else {
					$resolve_interval = 300;
				}
				mwexec("/usr/local/sbin/filterdns -p {$g['varrun_path']}/filterdns.pid -i {$resolve_interval} -c {$g['varetc_path']}/filterdns.conf -d 1");
			}
		} else {
			killbypid("{$g['varrun_path']}/filterdns.pid");
			@unlink("{$g['varrun_path']}/filterdns.pid");
		}
	}

	/* run items scheduled for after filter configure run */
	$fda = fopen("{$g['tmp_path']}/commands.txt", "w");
	if ($fda) {
		if ($after_filter_configure_run) {
			foreach ($after_filter_configure_run as $afcr) {
				fwrite($fda, $afcr . "\n");
			}
			unset($after_filter_configure_run);
		}

		/*
		 *      we need a way to let a user run a shell cmd after each
		 *      filter_configure() call.  run this xml command after
		 *      each change.
		 */
		if ($config['system']['afterfilterchangeshellcmd'] <> "") {
			fwrite($fda, $config['system']['afterfilterchangeshellcmd'] . "\n");
		}

		fclose($fda);
	}

	if (file_exists("{$g['tmp_path']}/commands.txt")) {
		mwexec("sh {$g['tmp_path']}/commands.txt &");
		unlink("{$g['tmp_path']}/commands.txt");
	}

	/* if time based rules are enabled then swap in the set */
	if ($time_based_rules == true) {
		filter_tdr_install_cron(true);
	} else {
		filter_tdr_install_cron(false);
	}

	if (platform_booting() == true) {
		echo ".";
	}

	if ($delete_states_if_needed) {
		update_filter_reload_status(gettext("Processing down interface states"));
		filter_delete_states_for_down_gateways();
	}

	update_filter_reload_status(gettext("Running plugins"));

	if (is_dir("/usr/local/pkg/pf/")) {
		/* process packager manager custom rules */
		update_filter_reload_status(gettext("Running plugins (pf)"));
		run_plugins("/usr/local/pkg/pf/");
		update_filter_reload_status(gettext("Plugins completed."));
	}

	update_filter_reload_status(gettext("Done"));
	if (platform_booting() == true) {
		echo gettext("done.") . "\n";
	}

	unlock($filterlck);
	return 0;
}

function filter_generate_scrubing() {
	global $config, $FilterIflist;
	$scrubrules = "";

	if (isset($config['system']['maxmss_enable'])) {
		$maxmss = 1400;
		if (!empty($config['system']['maxmss'])) {
			$maxmss = $config['system']['maxmss'];
		}

		$scrubrules .= "scrub from any to <vpn_networks> max-mss {$maxmss}\n";
		$scrubrules .= "scrub from <vpn_networks> to any max-mss {$maxmss}\n";
	}
	/* disable scrub option */
	foreach ($FilterIflist as $scrubif => $scrubcfg) {
		if (isset($scrubcfg['virtual']) || empty($scrubcfg['descr'])) {
			continue;
		}
		/* set up MSS clamping */
		if (($scrubcfg['mss'] <> "") &&
		    (is_numeric($scrubcfg['mss'])) &&
		    ($scrubcfg['if'] != "pppoe") &&
		    ($scrubcfg['if'] != "pptp") &&
		    ($scrubif['if'] != "l2tp")) {
			$mssclamp = "max-mss " . (intval($scrubcfg['mss'] - 40));
		} else {
			$mssclamp = "";
		}
		/* configure no-df for linux nfs and others */
		if ($config['system']['scrubnodf']) {
			$scrubnodf = "no-df";
		} else {
			$scrubnodf = "";
		}
		if ($config['system']['scrubrnid']) {
			$scrubrnid = "random-id";
		} else {
			$scrubrnid = "";
		}
		if (!isset($config['system']['disablescrub'])) {
			$scrubrules .= "scrub on \${$scrubcfg['descr']} all {$scrubnodf} {$scrubrnid} {$mssclamp} fragment reassemble\n"; // reassemble all directions
		} else if (!empty($mssclamp)) {
			$scrubrules .= "scrub on \${$scrubcfg['descr']} {$mssclamp}\n";
		}
	}
	return $scrubrules;
}

function filter_generate_nested_alias($name, $alias, &$aliasnesting, &$aliasaddrnesting) {
	global $aliastable, $filterdns;

	$addresses = explode(" ", $alias);
	$use_filterdns = false;
	$finallist = "";
	$builtlist = "";
	$urltable_nesting = "";
	$aliasnesting[$name] = $name;
	$alias_type = alias_get_type($name);
	foreach ($addresses as $address) {
		if (empty($address)) {
			continue;
		}
		$linelength = strlen($builtlist);
		$tmpline = "";
		if (is_alias($address)) {
			if (alias_get_type($address) == 'urltable') {
				// Feature#1603. For this type of alias we do not need to recursively call filter_generate_nested_alias. Just load IPs from the file.
				$urltable_nesting = alias_expand_urltable($address);
				if (!empty($urltable_nesting)) {
					$urlfile_as_arr = file($urltable_nesting);
					foreach ($urlfile_as_arr as $line) {
						$address= rtrim($line);
						if ((strlen($tmpline) + $linelength) > 4036) {
							$finallist .= "{$tmpline} \\\n";
							$tmpline = "";
						}
						$tmpline .= " {$address}";
					}
				}
			}
			/* We already expanded this alias so there is no necessity to do it again. */
			else if (!isset($aliasnesting[$address])) {
				$tmpline = filter_generate_nested_alias($name, $aliastable[$address], $aliasnesting, $aliasaddrnesting);
			}
		} else if (!isset($aliasaddrnesting[$address])) {
			if (!is_ipaddr($address) && !is_subnet($address) && !((($alias_type == 'port') || ($alias_type == 'url_ports')) && (is_port($address) || is_portrange($address))) && is_hostname($address)) {
				if (!isset($filterdns["{$address}{$name}"])) {
					$use_filterdns = true;
					$filterdns["{$address}{$name}"] = "pf {$address} {$name}\n";
				}
				continue;
			}
			$aliasaddrnesting[$address] = $address;
			$tmpline = " {$address}";
		}
		if ((strlen($tmpline)+ $linelength) > 4036) {
			$finallist .= "{$builtlist} \\\n";
			$builtlist = "";
		}
		if (!empty($tmpline)) {
			$builtlist .= " {$tmpline}";
		}
	}
	$finallist .= $builtlist;

	if ($use_filterdns === true && !empty($finallist)) {
		foreach (explode(" ", $finallist) as $address) {
			if (empty($address)) {
				continue;
			}
			if ((is_ipaddr($address) || is_subnet($address)) && !isset($filterdns["{$address}{$name}"])) {
				$filterdns["{$address}{$name}"] = "pf {$address} {$name}\n";
			}
		}
		$finallist = '';
	}

	return $finallist;
}

function filter_expand_alias($alias_name) {
	global $config;

	if (isset($config['aliases']['alias'])) {
		foreach ($config['aliases']['alias'] as $aliased) {
			if ($aliased['name'] == $alias_name) {
				$aliasnesting = array();
				$aliasaddrnesting = array();
				return filter_generate_nested_alias($aliased['name'], $aliased['address'], $aliasnesting, $aliasaddrnesting);
			}
		}
	}
}

function filter_expand_alias_array($alias_name) {
	$expansion = filter_expand_alias($alias_name);
	return explode(" ", preg_replace('/\s+/', ' ', trim($expansion)));
}

function filter_generate_aliases() {
	global $config, $FilterIflist, $after_filter_configure_run;

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_generate_aliases() being called $mt\n";
	}

	$alias = "#System aliases\n ";
	$aliases = "loopback = \"{ lo0 }\"\n";

	foreach ($FilterIflist as $if => $ifcfg) {
		if (is_array($ifcfg[0])) {
			if ($ifcfg[0]['if'] == 'pppoe') {
				$aliases .= "{$ifcfg[0]['descr']} = \"{ {$ifcfg[0]['if']}";
				$aliases .= " }\"\n";
			}
		} elseif (!empty($ifcfg['descr']) && !empty($ifcfg['if'])) {
			if ($ifcfg['type6'] == '6rd') {
				$aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']} {$if}_stf";
			} else if ($ifcfg['type6'] == '6to4') {
				$aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']} {$if}_stf";
			} else {
				$aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']}";

				if ($ifcfg['type'] == 'pptp') {
					foreach (get_parent_interface($ifcfg['if']) as $parent_if) {
						if ($parent_if != $ifcfg['if']) {
							$aliases .= " {$parent_if}";
						}
					}
				}
			}
			$aliases .= " }\"\n";
		}
	}

	$aliases .= "\n#SSH Lockout Table\n";
	$aliases .= "table <sshlockout> persist\n";
	$aliases .= "table <webConfiguratorlockout> persist\n";

	$aliases .= "#Snort tables\n";
	$aliases .= "table <snort2c>\n";
	$aliases .= "table <virusprot>\n";
	if (!file_exists("/etc/bogons") || !file_exists("/etc/bogonsv6")) {
		conf_mount_rw();
		if (!file_exists("/etc/bogons")) {
			@file_put_contents("/etc/bogons", "");
		}
		if (!file_exists("/etc/bogonsv6")) {
			@file_put_contents("/etc/bogonsv6", "");
		}
		conf_mount_ro();
	}
	$aliases .= "table <bogons> persist file \"/etc/bogons\"\n";
	if (is_bogonsv6_used()) {
		$aliases .= "table <bogonsv6> persist file \"/etc/bogonsv6\"\n";
	}

	$vpns_list = filter_get_vpns_list();
	if ($vpns_list) {
		$aliases .= "table <vpn_networks> { $vpns_list }\n";
	}

	/* add a Negate_networks table */
	$aliases .= "table <negate_networks> ";
	if ($vpns_list) {
		$aliases .= "{ $vpns_list }";
	}
	$aliases .= "\n";

	$aliases .= "\n# User Aliases \n";
	/* Setup pf groups */
	if (isset($config['aliases']['alias'])) {
		foreach ($config['aliases']['alias'] as $aliased) {
			$extralias = "";
			$aliasnesting = array();
			$aliasaddrnesting = array();
			if (is_numericint($aliased['name'])) {
				// skip aliases with numeric-only names. redmine #4289
				file_notice("Filter_Reload", sprintf(gettext("Aliases with numeric-only names are not valid. Skipping alias %s"), $aliased['name']));
				continue;
			}
			$addrlist = filter_generate_nested_alias($aliased['name'], $aliased['address'], $aliasnesting, $aliasaddrnesting);
			switch ($aliased['type']) {
			case "host":
			case "network":
			case "url":
				$tableaddrs = "{$addrlist}{$extralias}";
				if (empty($tableaddrs)) {
					$aliases .= "table <{$aliased['name']}> persist\n";
					if (empty($aliased['address'])) {
						$after_filter_configure_run[] = "/sbin/pfctl -T flush -t " . escapeshellarg($aliased['name']);
					}
				} else {
					$aliases .= "table <{$aliased['name']}> { {$addrlist}{$extralias} } \n";
				}

				$aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n";
				break;
			case "openvpn":
				$openvpncfg = array();
				if ($config['openvpn']['user']) {
					/* XXX: Check if we have a correct ip? */
					foreach ($config['openvpn']['user'] as $openvpn) {
						$openvpncfg[$openvpn['name']] = $openvpn['ip'];
					}
				}
				$vpn_lines = explode("\n", $addrlist);
				foreach ($vpn_lines as $vpn_line) {
					$vpn_address_split = explode(" ", $vpn_line);
					foreach ($vpn_address_split as $vpnsplit) {
						if (isset($openvpncfg[$vpnsplit])) {
							$newaddress .= " ";
							$newaddress .= $openvpn[$vpnsplit];
							break;
						}
					}
				}
				$aliases .= "table <{$aliased['name']}> { {$newaddress}{$extralias} } \n";
				$aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n";
				break;
			case "urltable":
				$urlfn = alias_expand_urltable($aliased['name']);
				if ($urlfn) {
					$aliases .= "table <{$aliased['name']}> persist file \"{$urlfn}\"\n";
					$aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n";
				}
				break;
			case "urltable_ports":
				// TODO: Change it when pf supports tables with ports
				$urlfn = alias_expand_urltable($aliased['name']);
				if ($urlfn) {
					$aliases .= "{$aliased['name']} = \"{ " . preg_replace("/\n/", " ", file_get_contents($urlfn)) . " }\"\n";
				}
				break;
			case "port":
			case "url_ports":
				$aliases .= "{$aliased['name']} = \"{ {$addrlist} }\"\n";
				break;
			default:
				$aliases .= "{$aliased['name']} = \"{ {$aliased['address']}{$extralias} }\"\n";
				break;
			}
		}
	}
	$result = "{$alias} \n";
	$result .= "{$aliases}";

	return $result;
}

function filter_generate_gateways() {
	global $config, $g, $GatewaysList;

	$rules = "# Gateways\n";

	update_filter_reload_status(gettext("Creating gateway group item..."));

	/* Lookup Gateways to be used in filter rules once */
	$GatewaysList = return_gateways_array();
	$GatewayGroupsList = return_gateway_groups_array();

	if (is_array($GatewaysList)) {
		foreach ($GatewaysList as $gwname => $gateway) {
			$int = $gateway['interface'];
			$gwip = $gateway['gateway'];
			$route = "";
			if (!is_ipaddr($gwip)) {
				$gwip = get_interface_gateway($gateway['friendlyiface']);
			}
			if (is_ipaddr($gwip) && !empty($int) && !isset($gateway['force_down'])) {
				$route = "route-to ( {$int} {$gwip} )";
			}
			if (($route === "") && isset($config['system']['skip_rules_gw_down'])) {
				unset($GatewaysList[$gwname]);
			} else {
				$rules .= "GW{$gwname} = \" {$route} \"\n";
			}
		}
	}

	if (is_array($GatewayGroupsList)) {
		foreach ($GatewayGroupsList as $gateway => $members) {
			$route = "";
			/* hey, that's not a group member! */
			unset($members['ipprotocol']);
			unset($members['descr']);
			if (count($members) > 0) {
				$foundlb = 0;
				$routeto = "";
				$routetomembers = 0;
				foreach ($members as $idx => $member) {
					$int = $member['int'];
					$gatewayip = $member['gwip'];
					if (($int <> "") && is_ipaddr($gatewayip)) {
						if ($g['debug']) {
							log_error(sprintf(gettext('Setting up route with %1$s on %2$s'), $gatewayip, $int));
						}
						if ($routetomembers + $member['weight'] > 384) {
							// would create invalid ruleset, bail
							log_error(sprintf(gettext("Too many members in group %s, gateway group truncated in ruleset."), $member['name']));
							continue;
						}
						if ($member['weight'] > 1) {
							$routeto .= str_repeat("( {$int} {$gatewayip} ) ", $member['weight']);
							$routetomembers += $member['weight'];
						} else {
							$routeto .= "( {$int} {$gatewayip} ) ";
							$routetomembers++;
						}
						$foundlb++;
					} else {
						log_error(sprintf(gettext("An error occurred while trying to find the interface got %s .  The rule has not been added."), $gatewayip));
					}
				}
				$route = "";
				if ($foundlb > 0) {
					$route = " route-to { {$routeto} } ";
					if ($foundlb > 1) {
						$route .= " round-robin ";
						if (isset($config['system']['lb_use_sticky'])) {
							$route .= " sticky-address ";
						}
					}
				}
			}
			if (($route === "") && isset($config['system']['skip_rules_gw_down'])) {
				unset($GatewayGroupsList[$gateway]);
			} else {
				$rules .= "GW{$gateway} = \" {$route} \"\n";
			}
		}
	}

	/* Create a global array to avoid errors on rulesets. */
	$GatewaysList = $GatewaysList + $GatewayGroupsList;

	$rules .= "\n";

	return $rules;
}

/* returns space separated list of vpn subnets */
function filter_get_vpns_list() {
	global $config;

	$vpns = "";
	$vpns_arr = array();

	/* ipsec */
	if (!function_exists('ipsec_enabled')) {
		require_once("ipsec.inc");
	}
	if (ipsec_enabled()) {
		if (is_array($config['ipsec']['phase2'])) {
			foreach ($config['ipsec']['phase2'] as $ph2ent) {
				if ((!$ph2ent['mobile']) && ($ph2ent['mode'] != 'transport')) {
					if (!is_array($ph2ent['remoteid'])) {
						continue;
					}
					$ph2ent['remoteid']['mode'] = $ph2ent['mode'];
					$vpns_subnet = ipsec_idinfo_to_cidr($ph2ent['remoteid']);
					if (!is_subnet($vpns_subnet) || $vpns_subnet == "0.0.0.0/0") {
						continue;
					}
					$vpns_arr[] = $vpns_subnet;
				}
			}
		}
	}

	/* openvpn */
	foreach (array('client', 'server') as $type) {
		if (is_array($config['openvpn']["openvpn-$type"])) {
			foreach ($config['openvpn']["openvpn-$type"] as $settings) {
				if (is_array($settings)) {
					if (!isset($settings['disable'])) {
						$remote_networks = explode(',', $settings['remote_network']);
						foreach ($remote_networks as $remote_network) {
							if (is_subnet($remote_network) && ($remote_network <> "0.0.0.0/0")) {
								$vpns_arr[] = $remote_network;
							}
						}
						if (is_subnet($settings['tunnel_network']) && $settings['tunnel_network'] <> "0.0.0.0/0") {
							$vpns_arr[] = $settings['tunnel_network'];
						}
					}
				}
			}
		}
	}
	/* pppoe */
	if (is_array($config['pppoes']['pppoe'])) {
		foreach ($config['pppoes']['pppoe'] as $pppoe) {
			if ($pppoe['mode'] == "server") {
				if (is_ipaddr($pppoe['remoteip'])) {
					$pppoesub = gen_subnet($pppoe['remoteip'], $pppoe['pppoe_subnet']);
					if (is_subnet($pppoesub)) {
						$vpns_arr[] = $pppoesub;
					}
				}
			}
		}
	}

	if (!empty($vpns_arr)) {
		$vpns = implode(" ", $vpns_arr);
	}

	return $vpns;
}

/* returns space separated list of directly connected networks
 * optionally returns an array instead, including friendly interface and gateway (if applicable)
 */
function filter_get_direct_networks_list($returnsubnetsonly = true) {
	global $config, $FilterIflist, $GatewaysList;
	/* build list of directly connected interfaces and networks */
	$networks = "";
	$networks_arr = array();
	if (empty($FilterIflist)) {
		filter_generate_optcfg_array();
	}
	foreach ($FilterIflist as $ifent => $ifcfg) {
		$subnet = "{$ifcfg['sa']}/{$ifcfg['sn']}";
		if (is_subnet($subnet)) {
			if ($returnsubnetsonly) {
				$networks_arr[] = $subnet;
			} else {
				$networks_arr[] = array(
					'subnet' => $subnet,
					'if' => $ifent,
					'ip' => $ifcfg['ip']);
			}
		}
	}
	$viplist = get_configured_vip_list();
	foreach ($viplist as $vid => $address) {
		$vip = get_configured_vip($vid);
		$subnet = "{$vip['subnet']}/{$vip['subnet_bits']}";
		if (is_subnet($subnet) && !(is_subnetv4($subnet) && $vip['subnet_bits'] == 32) && !(is_subnetv6($subnet) && $vip['subnet_bits'] == 128)) {
			if (is_subnetv4($subnet)) {
				$subnet = gen_subnet($vip['subnet'], $vip['subnet_bits']) . "/{$vip['subnet_bits']}";
			} else if (is_subnetv6($subnet)) {
				$subnet = gen_subnetv6($vip['subnet'], $vip['subnet_bits']) . "/{$vip['subnet_bits']}";
			}
			if ($returnsubnetsonly) {
				$networks_arr[] = $subnet;
			} else {
				$networks_arr[] = array(
					'subnet' => $subnet,
					'if' => $vip['interface'],
					'ip' => $vip['subnet']);
			}
		}
	}
	foreach (get_staticroutes() as $netent) {
		if (is_subnet($netent['network'])) {
			if ($returnsubnetsonly) {
				$networks_arr[] = $netent['network'];
			} else if (isset($GatewaysList[$netent['gateway']])) {
				$networks_arr[] = array(
					'subnet' => $netent['network'],
					'if' => $GatewaysList[$netent['gateway']]['friendlyiface'],
					'gateway' => $GatewaysList[$netent['gateway']]['gateway']);
			}
		}
	}
	if ($returnsubnetsonly) {
		if (!empty($networks_arr)) {
			$networks = implode(" ", $networks_arr);
		}
		return $networks;
	} else {
		return $networks_arr;
	}
}

function filter_generate_optcfg_array() {
	global $config, $FilterIflist;
	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_generate_optcfg_array() being called $mt\n";
	}

	/* if list */
	$iflist = get_configured_interface_with_descr();
	foreach ($iflist as $if => $ifdetail) {
		$oc = $config['interfaces'][$if];
		$oic = array();
		$oic['if'] = get_real_interface($if);
		if (!does_interface_exist($oic['if'])) {
			continue;
		}
		$oic['ifv6'] = get_real_interface($if, "inet6");
		$oic['ip'] = get_interface_ip($if);
		$oic['ipv6'] = get_interface_ipv6($if);
		if (!is_ipaddrv4($oc['ipaddr']) && !empty($oc['ipaddr'])) {
			$oic['type'] = $oc['ipaddr'];
		}
		if (!is_ipaddrv6($oc['ipaddrv6']) && !empty($oc['ipaddrv6'])) {
			$oic['type6'] = $oc['ipaddrv6'];
		}
		if (!empty($oc['track6-interface'])) {
			$oic['track6-interface'] = $oc['track6-interface'];
		}
		$oic['sn'] = get_interface_subnet($if);
		$oic['snv6'] = get_interface_subnetv6($if);
		$oic['mtu'] = empty($oc['mtu']) ? 1500 : $oc['mtu'];
		$oic['mss'] = empty($oc['mss']) ? '' : $oc['mss'];
		$oic['descr'] = $ifdetail;
		$oic['sa'] = gen_subnet($oic['ip'], $oic['sn']);
		$oic['sav6'] = gen_subnetv6($oic['ipv6'], $oic['snv6']);
		$oic['nonat'] = $oc['nonat'];
		$oic['alias-address'] = $oc['alias-address'];
		$oic['alias-subnet'] = $oc['alias-subnet'];
		$oic['gateway'] = $oc['gateway'];
		$oic['gatewayv6'] = $oc['gatewayv6'];
		$oic['spoofcheck'] = "yes";
		$oic['bridge'] = link_interface_to_bridge($if);
		$vips = link_interface_to_vips($if);
		if (!empty($vips)) {
			foreach ($vips as $vipidx => $vip) {
				if (is_ipaddrv4($vip['subnet'])) {
					if (!is_array($oic['vips'])) {
						$oic['vips'] = array();
					}
					$oic['vips'][$vipidx]['ip'] = $vip['subnet'];
					if (empty($vip['subnet_bits'])) {
						$oic['vips'][$vipidx]['sn'] = 32;
					} else {
						$oic['vips'][$vipidx]['sn'] = $vip['subnet_bits'];
					}
				} else if (is_ipaddrv6($vip['subnet'])) {
					if (!is_array($oic['vips6'])) {
						$oic['vips6'] = array();
					}
					$oic['vips6'][$vipidx]['ip'] = $vip['subnet'];
					if (empty($vip['subnet_bits'])) {
						$oic['vips6'][$vipidx]['sn'] = 128;
					} else {
						$oic['vips6'][$vipidx]['sn'] = $vip['subnet_bits'];
					}
				}
			}
		}
		unset($vips);
		$FilterIflist[$if] = $oic;
	}

	if ($config['l2tp']['mode'] == "server") {
		$oic = array();
		$oic['if'] = 'l2tp';
		$oic['descr'] = 'L2TP';
		$oic['ip'] = $config['l2tp']['localip'];
		$oic['sa'] = $config['l2tp']['remoteip'];
		if ($config['l2tp']['l2tp_subnet'] <> "") {
			$oic['sn'] = $config['l2tp']['l2tp_subnet'];
		} else {
			$oic['sn'] = "32";
		}
		$oic['mode'] = $config['l2tp']['mode'];
		$oic['virtual'] = true;
		$FilterIflist['l2tp'] = $oic;
	}
	if (is_array($config['pppoes']['pppoe']) && (count($config['pppoes']['pppoe']) > 0)) {
		$pppoeifs = array();
		foreach ($config['pppoes']['pppoe'] as $pppoe) {
			if ($pppoe['mode'] == "server") {
				$oic = array();
				$oic['if'] = 'pppoe';
				$oic['descr'] = 'pppoe';
				$oic['ip'] = $pppoe['localip'];
				$oic['sa'] = $pppoe['remoteip'];
				$oic['mode'] = $pppoe['mode'];
				$oic['virtual'] = true;
				if ($pppoe['pppoe_subnet'] <> "") {
					$oic['sn'] = $pppoe['pppoe_subnet'];
				} else {
					$oic['sn'] = "32";
				}
				$pppoeifs[] = $oic;
			}
		}
		if (count($pppoeifs)) {
			$FilterIflist['pppoe'] = $pppoeifs;
		}
	}
	/* add ipsec interfaces */
	if (!function_exists('ipsec_enabled')) {
		require_once("ipsec.inc");
	}
	if (ipsec_enabled()) {
		$oic = array();
		$oic['if'] = 'enc0';
		$oic['descr'] = 'IPsec';
		$oic['type'] = "none";
		$oic['virtual'] = true;
		$FilterIflist['enc0'] = $oic;
	}
	/* add openvpn interfaces */
	if ($config['openvpn']['openvpn-server'] || $config['openvpn']['openvpn-client']) {
		$oic = array();
		$oic['if'] = "openvpn";
		$oic['descr'] = 'OpenVPN';
		$oic['type'] = "none";
		$oic['virtual'] = true;
		$FilterIflist['openvpn'] = $oic;
	}
	/* add interface groups */
	if (is_array($config['ifgroups']['ifgroupentry'])) {
		foreach ($config['ifgroups']['ifgroupentry'] as $ifgen) {
			$oc = array();
			$oc['if'] = $ifgen['ifname'];
			$oc['descr'] = $ifgen['ifname'];
			$oc['virtual'] = true;
			$FilterIflist[$ifgen['ifname']] = $oc;
		}
	}
}

function filter_flush_nat_table() {
	global $config, $g;
	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_flush_nat_table() being called $mt\n";
	}
	return mwexec("/sbin/pfctl -F nat");
}

function filter_flush_state_table() {
	return mwexec("/sbin/pfctl -F state");
}

function filter_get_reflection_interfaces($natif = "") {
	global $FilterIflist;

	$nat_if_list = array();

	foreach ($FilterIflist as $ifent => $ifname) {
		if ($ifname['if'] == $natif) {
			continue;
		}

		/* Do not add reflection redirects for interfaces with gateways */
		if (interface_has_gateway($ifent)) {
			continue;
		}

		$nat_if_list[] = $ifname['if'];
	}

	return $nat_if_list;
}

function filter_generate_reflection_nat($rule, &$route_table, $nat_ifs, $protocol, $target, $target_ip, $target_subnet = "") {
	global $config, $FilterIflist;

	if (!isset($config['system']['enablenatreflectionhelper'])) {
		return "";
	}

	// Initialize natrules holder string
	$natrules = "";

	update_filter_reload_status(sprintf(gettext("Creating reflection NAT rule for %s..."), $rule['descr']));

	/* TODO: Add this option to port forwards page. */
	if (isset($rule['staticnatport'])) {
		$static_port = " static-port";
	} else {
		$static_port = " port 1024:65535";
	}

	if (!empty($protocol)) {
		$protocol_text = " proto {$protocol}";
	} else {
		$protocol_text = "";
	}

	if (empty($target_subnet) || !is_numeric($target_subnet)) {
		$target_subnet = 32;
	}

	if (!is_array($route_table)) {
		/* get a simulated IPv4-only route table based on the config */
		$route_table = filter_get_direct_networks_list(false);
		foreach ($route_table as $rt_key => $rt_ent) {
			if (!is_subnetv4($rt_ent['subnet'])) {
				unset($route_table[$rt_key]);
			}
			if (isset($route_table[$rt_key]) && isset($FilterIflist[$rt_ent['if']]['if'])) {
				$route_table[$rt_key]['if'] = $FilterIflist[$rt_ent['if']]['if'];
			}
		}
	}

	/* Check if the target is accessed through a static route */
	foreach ($route_table as $route) {
		if (isset($route['gateway']) && is_ipaddr($route['gateway'])) {
			$subnet_split = explode("/", $route['subnet']);
			if (in_array($route['if'], $nat_ifs) && check_subnets_overlap($target_ip, $target_subnet, $subnet_split[0], $subnet_split[1])) {
				$target_ip = $route['gateway'];
				$target_subnet = 32;
				break;
			}
		}
	}

	/* Search for matching subnets in the routing table */
	foreach ($route_table as $route) {
		$subnet = $route['subnet'];
		$subnet_split = explode("/", $subnet);
		$subnet_if = $route['if'];
		/* Blacklist invalid "from" sources since they can be picked up accidentally and cause rule errors. */
		$no_reflect_from = array("l2tp");
		if (in_array($subnet_if, $nat_ifs) && check_subnets_overlap($target_ip, $target_subnet, $subnet_split[0], $subnet_split[1])) {
			$ifsubnet_ip = "";
			/* Find interface IP to use for NAT */
			foreach ($route_table as $ifnetwork) {
				if (isset($ifnetwork['ip']) && is_ipaddr($ifnetwork['ip']) && $ifnetwork['if'] == $subnet_if && ip_in_subnet($ifnetwork['ip'], $subnet)) {
					$ifsubnet_ip = $ifnetwork['ip'];
					break;
				}
			}
			if (!empty($ifsubnet_ip) && !in_array($subnet, $no_reflect_from)) {
				$subnets = array($subnet);
				/* Find static routes that also need to be referenced in the NAT rule */
				foreach ($route_table as $rtentry) {
					if (isset($rtentry['gateway']) && is_ipaddr($rtentry['gateway']) && $rtentry['if'] == $subnet_if && ip_in_subnet($rtentry['gateway'], $subnet)) {
						$subnets[] = $rtentry['subnet'];
					}
				}
				if (count($subnets) > 1) {
					$subnet = "{ " . implode(" ", $subnets) . " }";
				}
				$natrules .= "no nat on {$subnet_if}{$protocol_text} from {$subnet_if} to {$target}\n";
				$natrules .= "nat on {$subnet_if}{$protocol_text} from {$subnet} to {$target} -> {$ifsubnet_ip}{$static_port}\n";
			}
		}
	}

	if (!empty($natrules)) {
		$natrules .= "\n";
	}

	return $natrules;
}

function filter_generate_reflection_proxy($rule, $nordr, $rdr_ifs, $srcaddr, $dstaddr_port, &$starting_localhost_port, &$reflection_rules) {
	global $FilterIflist, $config;

	// Initialize natrules holder string
	$natrules = "";
	$reflection_rules = array();

	if (!empty($rdr_ifs)) {
		if ($config['system']['reflectiontimeout']) {
			$reflectiontimeout = $config['system']['reflectiontimeout'];
		} else {
			$reflectiontimeout = "2000";
		}

		update_filter_reload_status(sprintf(gettext("Creating reflection rule for %s..."), $rule['descr']));

		$rdr_if_list = implode(" ", $rdr_ifs);
		if (count($rdr_ifs) > 1) {
			$rdr_if_list = "{ {$rdr_if_list} }";
		}

		$natrules .= "\n# Reflection redirects\n";

		$localport = $rule['local-port'];
		if (!empty($localport) && is_alias($localport)) {
			$localport = filter_expand_alias($localport);
			$localport = explode(" ", trim($localport));
			// The translation port for rdr, when specified, does not support more than one port or range.
			// Emulating for behavior consistent with the original port forward.
			$localport = $localport[0];
		}

		if (is_alias($rule['destination']['port'])) {
			if (empty($localport) || $rule['destination']['port'] == $rule['local-port']) {
				$dstport = filter_expand_alias($rule['destination']['port']);
				$dstport = array_filter(explode(" ", trim($dstport)));
				$localport = "";
			} else if (!empty($localport)) {
				$dstport = array($localport);
			}
		} else {
			$dstport = array(str_replace("-", ":", $rule['destination']['port']));
			$dstport_split = explode(":", $dstport[0]);

			if (!empty($localport) && $dstport_split[0] != $rule['local-port']) {
				if (!is_alias($rule['local-port']) && $dstport_split[1] && $dstport_split[0] != $dstport_split[1]) {
					$localendport = $localport + ($dstport_split[1] - $dstport_split[0]);
					$localport .= ":$localendport";
				}

				$dstport = array($localport);
			} else {
				$localport = "";
			}
		}

		$dstaddr = explode(" ", $dstaddr_port);
		if ($dstaddr[2]) {
			$rflctintrange = array_pop($dstaddr);
			array_pop($dstaddr);
		} else {
			return "";
		}
		$dstaddr = implode(" ", $dstaddr);
		if (empty($dstaddr) || trim($dstaddr) == "0.0.0.0" || strtolower(trim($dstaddr)) == "port") {
			return "";
		}

		if (isset($rule['destination']['any'])) {
			if (!$rule['interface']) {
				$natif = "wan";
			} else {
				$natif = $rule['interface'];
			}

			if (!isset($FilterIflist[$natif])) {
				return "";
			}
			if (is_ipaddr($FilterIflist[$natif]['ip'])) {
				$dstaddr = $FilterIflist[$natif]['ip'];
			} else {
				return "";
			}

			if (!empty($FilterIflist[$natif]['sn'])) {
				$dstaddr = gen_subnet($dstaddr, $FilterIflist[$natif]['sn']) . '/' . $FilterIflist[$natif]['sn'];
			}
		}

		switch ($rule['protocol']) {
			case "tcp/udp":
				$protocol = "{ tcp udp }";
				$reflect_protos = array('tcp', 'udp');
				break;
			case "tcp":
			case "udp":
				$protocol = $rule['protocol'];
				$reflect_protos = array($rule['protocol']);
				break;
			default:
				return "";
				break;
		}

		if (!empty($nordr)) {
			$natrules .= "no rdr on {$rdr_if_list} proto {$protocol} from {$srcaddr} to {$dstaddr} port {$rflctintrange}\n";
			return $natrules;
		}

		if (is_alias($rule['target'])) {
			$target = filter_expand_alias($rule['target']);
		} else if (is_ipaddr($rule['target'])) {
			$target = $rule['target'];
		} else if (is_ipaddr($FilterIflist[$rule['target']]['ip'])) {
			$target = $FilterIflist[$rule['target']]['ip'];
		} else {
			return "";
		}
		$starting_localhost_port_tmp = $starting_localhost_port;
		$toomanyports = false;
		/* only install reflection rules for < 19991 items */
		foreach ($dstport as $loc_pt) {
			if ($starting_localhost_port < 19991) {
				$toadd_array = array();
				$inetdport = $starting_localhost_port;
				$rflctrange = $starting_localhost_port;

				$loc_pt = explode(":", $loc_pt);
				if ($loc_pt[1] && $loc_pt[1] > $loc_pt[0]) {
					$delta = $loc_pt[1] - $loc_pt[0];
				} else {
					$delta = 0;
				}

				if (($inetdport + $delta + 1) - $starting_localhost_port_tmp > 500) {
					log_error(gettext("Not installing NAT reflection rules for a port range > 500"));
					$inetdport = $starting_localhost_port;
					$toadd_array = array();
					$toomanyports = true;
					break;
				} else if (($inetdport + $delta) > 19990) {
					log_error(gettext("Installing partial NAT reflection rules. Maximum 1,000 reached."));
					$delta = 19990 - $inetdport;
					$loc_pt[1] = $loc_pt[0] + $delta;
					if ($delta == 0) {
						unset($loc_pt[1]);
					}
					$toomanyports = true;

					if (!empty($localport)) {
						if (is_alias($rule['destination']['port'])) {
							$rflctintrange = alias_expand($rule['destination']['port']);
						} else {
							if ($dstport_split[1]) {
								$dstport_split[1] = $dstport_split[0] + $inetdport + $delta - $starting_localhost_port;
							}
							$rflctintrange = implode(":", $dstport_split);
						}
					}
				}

				if (empty($localport)) {
					$rflctintrange = implode(":", $loc_pt);
				}
				if ($inetdport + $delta > $starting_localhost_port) {
					$rflctrange .= ":" . ($inetdport + $delta);
				}
				$starting_localhost_port = $inetdport + $delta + 1;
				$toadd_array = array_merge($toadd_array, range($loc_pt[0], $loc_pt[0] + $delta));

				if (!empty($toadd_array)) {
					$rtarget = explode(" ", trim($target));
					foreach ($toadd_array as $tda) {
						if (empty($tda)) {
							continue;
						}
						foreach ($reflect_protos as $reflect_proto) {
							if ($reflect_proto == "udp") {
								$socktype = "dgram";
								$dash_u = "-u ";
								$wait = "yes";
							} else {
								$socktype = "stream";
								$dash_u = "";
								$wait = "no";
							}
							foreach ($rtarget as $targip) {
								if (empty($targip)) {
									continue;
								}
								$reflection_rule = array(
									'port' => $inetdport,
									'socket_type' => $socktype,
									'protocol' => $reflect_proto,
									'wait' => $wait,
									'user' => 'nobody',
									'server' => '/usr/bin/nc',
									'server_args' => "{$dash_u}-w {$reflectiontimeout} {$targip} {$tda}"
								);
								$reflection_rules[] = $reflection_rule;
								unset($reflection_rule);
							}
						}
						$inetdport++;
					}
					$natrules .= "rdr on {$rdr_if_list} proto {$protocol} from {$srcaddr} to {$dstaddr} port {$rflctintrange} tag PFREFLECT -> 127.0.0.1 port {$rflctrange}\n";
				}
			}

			if ($toomanyports) {
				break;
			}
		}
	}

	return $natrules;
}

function filter_nat_rules_automatic_tonathosts($with_descr = false) {
	global $config, $FilterIflist, $GatewaysList;

	$tonathosts = array("127.0.0.0/8");
	$descriptions = array(gettext("localhost"));

	foreach (get_staticroutes() as $route) {
		$netip = explode("/", $route['network']);
		if (isset($GatewaysList[$route['gateway']])) {
			$gateway =& $GatewaysList[$route['gateway']];
			if (!interface_has_gateway($gateway['interface']) && is_private_ip($netip[0])) {
				$tonathosts[] = $route['network'];
				$descriptions[] = gettext("static route");
			}
		}
	}

	/* create outbound nat entries for all local networks */
	foreach ($FilterIflist as $ocname => $oc) {
		if (interface_has_gateway($ocname)) {
			continue;
		}
		if (is_ipaddr($oc['alias-address'])) {
			$tonathosts[] = "{$oc['alias-address']}/{$oc['alias-subnet']}";
			$descriptions[] = $oc['descr'] . " " . gettext("DHCP alias address");
		}
		if ($oc['sa']) {
			$tonathosts[] = "{$oc['sa']}/{$oc['sn']}";
			$descriptions[] = $oc['descr'];
			if (isset($oc['vips']) && is_array($oc['vips'])) {
				$if_subnets = array("{$oc['sa']}/{$oc['sn']}");
				foreach ($oc['vips'] as $vip) {
					if (!is_ipaddrv4($vip['ip'])) {
						continue;
					}

					foreach ($if_subnets as $subnet) {
						if (ip_in_subnet($vip['ip'], $subnet)) {
							continue 2;
						}
					}

					$network = gen_subnet($vip['ip'], $vip['sn']);
					array_unshift($tonathosts, $network . '/' . $vip['sn']);
					array_unshift($descriptions, "Virtual IP ({$oc['descr']})");
					$if_subnets[] = $network . '/' . $vip['sn'];
					unset($network);
				}
				unset($if_subnets);
			}
		}
	}

	/* PPPoE subnet */
	if (is_array($FilterIflist['pppoe'])) {
		foreach ($FilterIflist['pppoe'] as $pppoe) {
			if (is_private_ip($pppoe['ip'])) {
				$tonathosts[] = "{$pppoe['sa']}/{$pppoe['sn']}";
				$descriptions[] = gettext("PPPoE server");
			}
		}
	}

	/* L2TP subnet */
	if (isset($FilterIflist['l2tp']) && $FilterIflist['l2tp']['mode'] == "server") {
		$l2tp_sa = $FilterIflist['l2tp']['sa'];
		$l2tp_sn = $FilterIflist['l2tp']['sn'];
		if (is_private_ip($l2tp_sa) && !empty($l2tp_sn)) {
			$tonathosts[] = "{$l2tp_sa}/{$l2tp_sn}";
			$descriptions[] = gettext("L2TP server");
		}
	}

	/* add openvpn interfaces */
	if (is_array($config['openvpn']['openvpn-server'])) {
		foreach ($config['openvpn']['openvpn-server'] as $ovpnsrv) {
			if (!isset($ovpnsrv['disable']) && !empty($ovpnsrv['tunnel_network'])) {
				$tonathosts[] = $ovpnsrv['tunnel_network'];
				$descriptions[] = gettext("OpenVPN server");
			}
		}
	}

	if (is_array($config['openvpn']['openvpn-client'])) {
		foreach ($config['openvpn']['openvpn-client'] as $ovpncli) {
			if (!isset($ovpncli['disable']) && !empty($ovpncli['tunnel_network'])) {
				$tonathosts[] = $ovpncli['tunnel_network'];
				$descriptions[] = gettext("OpenVPN client");
			}
		}
	}

	/* IPsec mode_cfg subnet */
	if ((isset($config['ipsec']['client']['enable'])) &&
	    (!empty($config['ipsec']['client']['pool_address'])) &&
	    (!empty($config['ipsec']['client']['pool_netbits']))) {
		$tonathosts[] = "{$config['ipsec']['client']['pool_address']}/{$config['ipsec']['client']['pool_netbits']}";
		$descriptions[] = gettext("IPsec client");
	}

	if ($with_descr) {
		$combined = array();
		foreach ($tonathosts as $idx => $subnet) {
			$combined[] = array(
				"subnet" => $subnet,
				"descr" => $descriptions[$idx]);
		}

		return $combined;
	} else {
		return $tonathosts;
	}
}

function filter_nat_rules_outbound_automatic($src) {
	global $config, $FilterIflist;

	$rules = array();
	foreach ($FilterIflist as $if => $ifcfg) {
		if (substr($ifcfg['if'], 0, 4) == "ovpn") {
			continue;
		}
		if (!interface_has_gateway($if)) {
			continue;
		}

		$natent = array();
		$natent['interface'] = $if;
		$natent['source']['network'] = $src;
		$natent['dstport'] = "500";
		$natent['target'] = "";
		$natent['destination']['any'] = true;
		$natent['staticnatport'] = true;
		$natent['descr'] = gettext('Auto created rule for ISAKMP');
		$rules[] = $natent;

		$natent = array();
		$natent['interface'] = $if;
		$natent['source']['network'] = $src;
		$natent['sourceport'] = "";
		$natent['target'] = "";
		$natent['destination']['any'] = true;
		$natent['natport'] = "";
		$natent['descr'] = gettext('Auto created rule');
		if (isset($ifcfg['nonat'])) {
			$natent['nonat'] = true;
		}
		$rules[] = $natent;
	}

	return $rules;
}

/* Generate a 'nat on' or 'no nat on' rule for given interface */
function filter_nat_rules_generate_if ($if, $src = "any", $srcport = "", $dst = "any", $dstport = "", $natip = "", $natport = "", $nonat = false, $staticnatport = false, $proto = "", $poolopts = "") {
	global $config, $FilterIflist;
	/* XXX: billm - any idea if this code is needed? */
	if ($src == "/32" || $src{0} == "/") {
		return "# src incorrectly specified\n";
	}
	if ($natip != "") {
		if (is_subnet($natip)) {
			$tgt = $natip;
		} elseif (is_alias($natip)) {
			$tgt = "\${$natip}";
		} else {
			$tgt = "{$natip}/32";
		}
	} else {
		$natip = get_interface_ip($if);
		if (is_ipaddr($natip)) {
			$tgt = "{$natip}/32";
		} else {
			$tgt = "(" . $FilterIflist[$if]['if'] . ")";
		}
	}
	/* Add the protocol, if defined */
	if (!empty($proto) && $proto != "any") {
		if ($proto == "tcp/udp") {
			$protocol = " proto { tcp udp }";
		} else {
			$protocol = " proto {$proto}";
		}
	} else {
		$protocol = "";
	}
	/* Set tgt for IPv6 */
	if ($proto == "ipv6") {
		$natip = get_interface_ipv6($if);
		if (is_ipaddrv6($natip)) {
			$tgt = "{$natip}/128";
		}
	}
	/* Add the hard set source port (useful for ISAKMP) */
	if ($natport != "") {
		$tgt .= " port {$natport}";
	}
	/* sometimes this gets called with "" instead of a value */
	if ($src == "") {
		$src = "any";
	}
	/* Match on this source port */
	if ($srcport != "") {
		$srcportexpand = alias_expand($srcport);
		if (!$srcportexpand) {
			$srcportexpand = $srcport;
		}
		$src .= " port {$srcportexpand}";
	}
	/* sometimes this gets called with "" instead of a value */
	if ($dst == "") {
		$dst = "any";
	}
	/* Match on this dest port */
	if ($dstport != "") {
		$dstportexpand = alias_expand($dstport);
		if (!$dstportexpand) {
			$dstportexpand = $dstport;
		}
		$dst .= " port {$dstportexpand}";
	}
	/* outgoing static-port option, hamachi, Grandstream, VOIP, etc */
	$staticnatport_txt = "";
	if ($staticnatport) {
		$staticnatport_txt = "static-port";
	} elseif (!$natport) {
		$tgt .= " port 1024:65535"; // set source port range
	}
	/* Allow for negating NAT entries */
	if ($nonat) {
		$nat = "no nat";
		$target = "";
		$staticnatport_txt = "";
		$poolopts = "";
	} else {
		$nat = "nat";
		$target = "-> {$tgt}";
	}
	$if_friendly = $FilterIflist[$if]['descr'];
	/* Put all the pieces together */
	if ($if_friendly) {
		$natrule = "{$nat} on \${$if_friendly} {$protocol} from {$src} to {$dst} {$target} {$poolopts} {$staticnatport_txt}\n";
	} else {
		$natrule .= "# Could not convert {$if} to friendly name(alias)\n";
	}
	return $natrule;
}

function xinetd_service_entry($entry_array) {
	$entry = <<<EOD
service {$entry_array['port']}-{$entry_array['protocol']}
{
	type = unlisted
	bind = 127.0.0.1
	port = {$entry_array['port']}
	socket_type = {$entry_array['socket_type']}
	protocol = {$entry_array['protocol']}
	wait = {$entry_array['wait']}
	user = {$entry_array['user']}
	server = {$entry_array['server']}
	server_args = {$entry_array['server_args']}
}


EOD;
	return $entry;
}

function filter_nat_rules_generate() {
	global $config, $g, $after_filter_configure_run, $FilterIflist, $GatewaysList, $aliases;

	$natrules = "no nat proto carp\n";
	$natrules .= "no rdr proto carp\n";
	$natrules .= "nat-anchor \"natearly/*\"\n";

	$natrules .= "nat-anchor \"natrules/*\"\n\n";
	update_filter_reload_status(gettext("Creating 1:1 rules..."));

	$reflection_txt = "";
	$route_table = "";

	/* any 1:1 mappings? */
	if (is_array($config['nat']['onetoone'])) {
		foreach ($config['nat']['onetoone'] as $rule) {
			if (isset($rule['disabled'])) {
				continue;
			}

			$sn = "";
			$sn1 = "";
			$target = alias_expand($rule['external']);
			if (!$target) {
				$natrules .= "# Unresolvable alias {$rule['target']}\n";
				continue;               /* unresolvable alias */
			}

			if (!$rule['interface']) {
				$natif = "wan";
			} else {
				$natif = $rule['interface'];
			}
			if (!isset($FilterIflist[$natif])) {
				continue;
			}

			$srcaddr = filter_generate_address($rule, 'source');
			$dstaddr = filter_generate_address($rule, 'destination');
			if (!$dstaddr) {
				$dstaddr = $FilterIflist[$natif]['ip'];
			}

			$srcaddr = trim($srcaddr);
			$dstaddr = trim($dstaddr);

			$tmp = explode('/', $srcaddr);
			$srcip = $tmp[0];
			if (!empty($tmp[1]) && is_numeric($tmp[1])) {
				$sn = $tmp[1];
				$sn1 = "/{$sn}";
			}

			$natif = $FilterIflist[$natif]['if'];
			$nat_if_list = array();

			if (isset($rule['nobinat'])) {
				$natrules .= "no binat on {$natif} from {$srcaddr} to {$dstaddr}\n";
			} else {
				/*
				 * If reflection is enabled, turn on extra redirections
				 * for this rule by adding other interfaces to an rdr rule.
				 */
				if ((isset($config['system']['enablebinatreflection']) || $rule['natreflection'] == "enable") &&
				    ($rule['natreflection'] != "disable")) {
					$nat_if_list = filter_get_reflection_interfaces($natif);
				}

				$natrules .= "binat on {$natif} from {$srcaddr} to {$dstaddr} -> {$target}{$sn1}\n";

				if (!empty($nat_if_list)) {
					$binat_if_list = implode(" ", $nat_if_list);
					$binat_if_list = "{ {$binat_if_list} }";
					$reflection_txt .= "rdr on {$binat_if_list} from {$dstaddr} to {$target}{$sn1} -> {$srcaddr} bitmask\n";
				}
			}

			$nat_if_list = array_merge(array($natif), $nat_if_list);
			$reflection_txt .= filter_generate_reflection_nat($rule, $route_table, $nat_if_list, "", $srcaddr, $srcip, $sn);
		}
	}

	/* Add binat rules for Network Prefix translation */
	if (is_array($config['nat']['npt'])) {
		foreach ($config['nat']['npt'] as $rule) {
			if (isset($rule['disabled'])) {
				continue;
			}

			if (!$rule['interface']) {
				$natif = "wan";
			} else {
				$natif = $rule['interface'];
			}
			if (!isset($FilterIflist[$natif])) {
				continue;
			}

			$srcaddr = filter_generate_address($rule, 'source');
			$dstaddr = filter_generate_address($rule, 'destination');

			$srcaddr = trim($srcaddr);
			$dstaddr = trim($dstaddr);

			$natif = $FilterIflist[$natif]['descr'];

			$natrules .= "binat on \${$natif} from {$srcaddr} to any -> {$dstaddr}\n";
			$natrules .= "binat on \${$natif} from any to {$dstaddr} -> {$srcaddr}\n";

		}
	}

	/* ipsec nat */
	if (!function_exists('ipsec_enabled')) {
		require_once("ipsec.inc");
	}
	if (ipsec_enabled()) {
		if (is_array($config['ipsec']['phase2'])) {
			foreach ($config['ipsec']['phase2'] as $ph2ent) {
				if ($ph2ent['mode'] != 'transport' && !empty($ph2ent['natlocalid']) && !isset($ph2ent['disabled'])) {
					ipsec_lookup_phase1($ph2ent, $ph1ent);
					if (!is_array($ph1ent)) {
						continue;
					}
					if (isset($ph1ent['disabled'])) {
						continue;
					}
					if (!is_array($ph2ent['localid'])) {
						$ph2ent['localid'] = array();
					}
					$ph2ent['localid']['mode'] = $ph2ent['mode'];
					$local_subnet = ipsec_idinfo_to_cidr($ph2ent['localid']);
					if (empty($local_subnet) || $local_subnet == "0.0.0.0/0") {
						continue;
					}
					if (!is_subnet($local_subnet) && !is_ipaddr($local_subnet)) {
						continue;
					}
					if (!is_array($ph2ent['natlocalid'])) {
						$ph2ent['natlocalid'] = array();
					}
					$ph2ent['natlocalid']['mode'] = $ph2ent['mode'];
					$natlocal_subnet = ipsec_idinfo_to_cidr($ph2ent['natlocalid']);
					if (empty($natlocal_subnet) || $natlocal_subnet == "0.0.0.0/0") {
						continue;
					}
					if (!is_subnet($natlocal_subnet) && !is_ipaddr($natlocal_subnet)) {
						continue;
					}
					if (!is_array($ph2ent['remoteid'])) {
						$ph2ent['remoteid'] = array();
					}
					$ph2ent['remoteid']['mode'] = $ph2ent['mode'];
					$remote_subnet = ipsec_idinfo_to_cidr($ph2ent['remoteid']);
					if (empty($remote_subnet)) {
						continue;
					}
					if (!is_subnet($remote_subnet) && !is_ipaddr($remote_subnet)) {
						continue;
					}
					if ($remote_subnet == "0.0.0.0/0") {
						$remote_subnet = "any";
					}
					if (is_ipaddr($natlocal_subnet) && !is_ipaddr($local_subnet)) {
						$nattype = "nat";
					} else {
						list($natnet, $natmask) = explode('/', $natlocal_subnet);
						list($locnet, $locmask) = explode('/', $local_subnet);
						if (intval($natmask) != intval($locmask)) {
							$nattype = "nat";
						} else {
							$nattype = "binat";
						}
						unset($natnet, $natmask, $locnet, $locmask);
					}
					$natrules .= "{$nattype} on enc0 from {$local_subnet} to {$remote_subnet} -> {$natlocal_subnet}\n";
				}
			}
		}
	}

	if ($config['nat']['outbound']['mode'] == "disabled") {
		$natrules .= "\n# Outbound NAT rules are disabled\n";
	}

	if ($config['nat']['outbound']['mode'] == "advanced" || $config['nat']['outbound']['mode'] == "hybrid") {
		$natrules .= "\n# Outbound NAT rules (manual)\n";
		/* advanced outbound rules */
		if (is_array($config['nat']['outbound']['rule'])) {
			foreach ($config['nat']['outbound']['rule'] as $obent) {
				if (isset($obent['disabled'])) {
					continue;
				}
				update_filter_reload_status(sprintf(gettext("Creating advanced outbound rule %s"), $obent['descr']));
				$src = alias_expand($obent['source']['network']);
				if (!$src) {
					$src = $obent['source']['network'];
				}
				$dst = alias_expand($obent['destination']['address']);
				if (!$dst) {
					$dst = $obent['destination']['address'];
				}
				if (isset($obent['destination']['not']) && !isset($obent['destination']['any'])) {
					$dst = "!" . $dst;
				}

				if (!$obent['interface'] || !isset($FilterIflist[$obent['interface']])) {
					continue;
				}

				$obtarget = ($obent['target'] == "other-subnet") ? $obent['targetip'] . '/' . $obent['targetip_subnet']: $obent['target'];
				$poolopts = (is_subnet($obtarget) || is_alias($obtarget)) ? $obent['poolopts'] : "";

				$natrules .= filter_nat_rules_generate_if($obent['interface'],
					$src,
					$obent['sourceport'],
					$dst,
					$obent['dstport'],
					$obtarget,
					$obent['natport'],
					isset($obent['nonat']),
					isset($obent['staticnatport']),
					$obent['protocol'],
					$poolopts
				);
			}
		}
	}

	/* outbound rules */
	if ((!isset($config['nat']['outbound']['mode'])) ||
	    ($config['nat']['outbound']['mode'] == "automatic") ||
	    ($config['nat']['outbound']['mode'] == "hybrid")) {
		$natrules .= "\n# Outbound NAT rules (automatic)\n";
		/* standard outbound rules (one for each interface) */
		update_filter_reload_status(gettext("Creating outbound NAT rules"));
		$tonathosts_array = filter_nat_rules_automatic_tonathosts();
		$tonathosts = implode(" ", $tonathosts_array);
		$numberofnathosts = count($tonathosts_array);

		$natrules .= "\n# Subnets to NAT \n";
		if ($numberofnathosts > 0) {
			update_filter_reload_status(gettext('Creating automatic outbound rules'));

			if ($numberofnathosts > 4) {
				$natrules .= "table <tonatsubnets> { {$tonathosts} }\n";
				$macroortable = "<tonatsubnets>";
			} else {
				$natrules .= "tonatsubnets	= \"{ {$tonathosts} }\"\n";
				$macroortable = "\$tonatsubnets";
			}

			$a_outs = filter_nat_rules_outbound_automatic($macroortable);
			foreach ($a_outs as $a_out) {
				$natrules .= filter_nat_rules_generate_if($a_out['interface'],
					$a_out['source']['network'],
					$a_out['sourceport'],
					$a_out['destination']['address'],
					$a_out['dstport'],
					$a_out['target'],
					$a_out['natport'],
					isset($a_out['nonat']),
					isset($a_out['staticnatport']));
			}
		}
		unset($tonathosts, $tonathosts_array, $numberofnathosts);
	}

	/* load balancer anchor */
	$natrules .= "\n# Load balancing anchor\n";
	$natrules .= "rdr-anchor \"relayd/*\"\n";

	update_filter_reload_status(gettext("Setting up TFTP helper"));
	$natrules .= "# TFTP proxy\n";
	$natrules .= "rdr-anchor \"tftp-proxy/*\"\n";

	if (!empty($config['system']['tftpinterface'])) {
		$tftpifs = explode(",", $config['system']['tftpinterface']);
		foreach ($tftpifs as $tftpif) {
			if ($FilterIflist[$tftpif]) {
				$natrules .= "rdr pass on {$FilterIflist[$tftpif]['if']} proto udp from any to any port tftp -> 127.0.0.1 port 6969\n";
			}
		}
	}

	/* DIAG: add ipv6 NAT, if requested */
	if ((isset($config['diag']['ipv6nat']['enable'])) &&
	    (is_ipaddr($config['diag']['ipv6nat']['ipaddr'])) &&
	    (is_array($FilterIflist['wan']))) {
		/* XXX: FIX ME!	 IPV6 */
		$natrules .= "rdr on \${$FilterIflist['wan']['descr']} proto ipv6 from any to any -> {$config['diag']['ipv6nat']['ipaddr']}\n";
	}

	unlink_if_exists("{$g['varetc_path']}/xinetd.conf");
	// Open xinetd.conf write handle
	$xinetd_fd = fopen("{$g['varetc_path']}/xinetd.conf", "w");

	/* add tftp protocol helper */
	$ftp_proxy_entry = array(
		'port' => 6969,
		'socket_type' => 'dgram',
		'protocol' => 'udp',
		'wait' => 'yes',
		'user' => 'root',
		'server' => '/usr/libexec/tftp-proxy',
		'server_args' => '-v'
	);
	fwrite($xinetd_fd, xinetd_service_entry($ftp_proxy_entry));

	if (isset($config['nat']['rule'])) {
		/* start reflection redirects on port 19000 of localhost */
		$starting_localhost_port = 19000;
		$natrules .= "# NAT Inbound Redirects\n";
		foreach ($config['nat']['rule'] as $rule) {
			update_filter_reload_status(sprintf(gettext("Creating NAT rule %s"), $rule['descr']));

			if (isset($rule['disabled'])) {
				continue;
			}

			/* if item is an alias, expand */
			$dstport = "";
			$dstport[0] = alias_expand($rule['destination']['port']);
			if (!$dstport[0]) {
				$dstport = explode("-", $rule['destination']['port']);
			}

			/* if item is an alias, expand */
			$localport = alias_expand($rule['local-port']);
			if (!$localport || $dstport[0] == $localport) {
				$localport = "";
			} else if (is_alias($rule['local-port'])) {
				$localport = filter_expand_alias($rule['local-port']);
				if ($localport) {
					$localport = explode(" ", trim($localport));
					$localport = $localport[0];
					$localport = " port {$localport}";
				}
			} else if (is_alias($rule['destination']['port'])) {
				$localport = " port {$localport}";
			} else {
				if (($dstport[1]) && ($dstport[0] != $dstport[1])) {
					$localendport = $localport + ($dstport[1] - $dstport[0]);

					$localport .= ":$localendport";
				}

				$localport = " port {$localport}";
			}

			switch (strtolower($rule['protocol'])) {
				case "tcp/udp":
					$protocol = "{ tcp udp }";
					break;
				case "tcp":
				case "udp":
					$protocol = strtolower($rule['protocol']);
					break;
				default:
					$protocol = strtolower($rule['protocol']);
					$localport = "";
					break;
			}

			$target = alias_expand($rule['target']);
			if (!$target && !isset($rule['nordr'])) {
				$natrules .= "# Unresolvable alias {$rule['target']}\n";
				continue;		/* unresolvable alias */
			}

			if (is_alias($rule['target'])) {
				$target_ip = filter_expand_alias($rule['target']);
			} else if (is_ipaddr($rule['target'])) {
				$target_ip = $rule['target'];
			} else if (is_ipaddr($FilterIflist[$rule['target']]['ip'])) {
				$target_ip = $FilterIflist[$rule['target']]['ip'];
			} else {
				$target_ip = $rule['target'];
			}
			$target_ip = trim($target_ip);

			if ($rule['associated-rule-id'] == "pass") {
				$rdrpass = "pass ";
			} else {
				$rdrpass = "";
			}

			if (isset($rule['nordr'])) {
				$nordr = "no ";
				$rdrpass = "";
			} else {
				$nordr = "";
			}

			if (!$rule['interface']) {
				$natif = "wan";
			} else {
				$natif = $rule['interface'];
			}

			if (!isset($FilterIflist[$natif])) {
				continue;
			}

			$srcaddr = filter_generate_address($rule, 'source', true);
			$dstaddr = filter_generate_address($rule, 'destination', true);
			$srcaddr = trim($srcaddr);
			$dstaddr = trim($dstaddr);

			if (!$dstaddr) {
				$dstaddr = $FilterIflist[$natif]['ip'];
			}

			$dstaddr_port = explode(" ", $dstaddr);
			if (empty($dstaddr_port[0]) || strtolower(trim($dstaddr_port[0])) == "port") {
				continue; // Skip port forward if no destination address found
			}
			$dstaddr_reflect = $dstaddr;
			if (isset($rule['destination']['any'])) {
				/* With reflection enabled, destination of 'any' has side effects
				 * that most people would not expect, so change it on reflection rules. */

				if (!empty($FilterIflist[$natif]['ip'])) {
					$dstaddr_reflect = $FilterIflist[$natif]['ip'];
				} else {
					// no IP, bail
					continue;
				}

				if (!empty($FilterIflist[$natif]['sn'])) {
					$dstaddr_reflect = gen_subnet($dstaddr_reflect, $FilterIflist[$natif]['sn']) . '/' . $FilterIflist[$natif]['sn'];
				}

				if ($dstaddr_port[2]) {
					$dstaddr_reflect .= " port " . $dstaddr_port[2];
				}
			}

			$natif = $FilterIflist[$natif]['if'];

			$reflection_type = "none";
			if ($rule['natreflection'] != "disable" && $dstaddr_port[0] != "0.0.0.0") {
				if ($rule['natreflection'] == "enable") {
					$reflection_type = "proxy";
				} else if ($rule['natreflection'] == "purenat") {
					$reflection_type = "purenat";
				} else if (!isset($config['system']['disablenatreflection'])) {
					if (isset($config['system']['enablenatreflectionpurenat'])) {
						$reflection_type = "purenat";
					} else {
						$reflection_type = "proxy";
					}
				}
			}

			if ($reflection_type != "none") {
				$nat_if_list = filter_get_reflection_interfaces($natif);
			} else {
				$nat_if_list = array();
			}

			if (empty($nat_if_list)) {
				$reflection_type = "none";
			}

			$localport_nat = $localport;
			if (empty($localport_nat) && $dstaddr_port[2]) {
				$localport_nat = " port " . $dstaddr_port[2];
			}

			if ($srcaddr <> "" && $dstaddr <> "" && $natif) {
				$natrules .= "{$nordr}rdr {$rdrpass}on {$natif} proto {$protocol} from {$srcaddr} to {$dstaddr}" . ($nordr == "" ? " -> {$target}{$localport}" : "");

				/* Does this rule redirect back to a internal host? */
				if (isset($rule['destination']['any']) && !isset($rule['nordr']) && !isset($config['system']['enablenatreflectionhelper']) && !interface_has_gateway($rule['interface'])) {
					$rule_interface_ip = find_interface_ip($natif);
					$rule_interface_subnet = find_interface_subnet($natif);
					if (!empty($rule_interface_ip) && !empty($rule_interface_subnet)) {
						$rule_subnet = gen_subnet($rule_interface_ip, $rule_interface_subnet);
						$natrules .= "\n";
						$natrules .= "no nat on {$natif} proto tcp from ({$natif}) to {$rule_subnet}/{$rule_interface_subnet}\n";
						$natrules .= "nat on {$natif} proto tcp from {$rule_subnet}/{$rule_interface_subnet} to {$target} port {$dstport[0]} -> ({$natif})\n";
					}
				}

				if ($reflection_type != "none") {
					if ($reflection_type == "proxy" && !isset($rule['nordr'])) {
						$natrules .= filter_generate_reflection_proxy($rule, $nordr, $nat_if_list, $srcaddr, $dstaddr, $starting_localhost_port, $reflection_rules);
						$nat_if_list = array($natif);
						foreach ($reflection_rules as $reflection_rule) {
							fwrite($xinetd_fd, xinetd_service_entry($reflection_rule));
						}
					} else if ($reflection_type == "purenat" || isset($rule['nordr'])) {
						$rdr_if_list = implode(" ", $nat_if_list);
						if (count($nat_if_list) > 1) {
							$rdr_if_list = "{ {$rdr_if_list} }";
						}
						$natrules .= "\n# Reflection redirect\n";
						$natrules .= "{$nordr}rdr {$rdrpass}on {$rdr_if_list} proto {$protocol} from {$srcaddr} to {$dstaddr_reflect}" . ($nordr == "" ? " -> {$target}{$localport}" : "");
						$nat_if_list = array_merge(array($natif), $nat_if_list);
					}
				}

				if (empty($nat_if_list)) {
					$nat_if_list = array($natif);
				}

				$natrules .= "\n";
				if (!isset($rule['nordr'])) {
					$natrules .= filter_generate_reflection_nat($rule, $route_table, $nat_if_list, $protocol, "{$target}{$localport_nat}", $target_ip);
				}
			}
		}
	}
	fclose($xinetd_fd);		// Close file handle

	$natrules .= discover_pkg_rules("nat");

	$natrules .= "# UPnPd rdr anchor\n";
	$natrules .= "rdr-anchor \"miniupnpd\"\n";

	if (!empty($reflection_txt)) {
		$natrules .= "\n# Reflection redirects and NAT for 1:1 mappings\n" . $reflection_txt;
	}

	// Check if xinetd is running, if not start it.	If so, restart it gracefully.
	if (file_exists("{$g['varetc_path']}/xinetd.conf")) {
		if (isvalidpid("{$g['varrun_path']}/xinetd.pid")) {
			sigkillbypid("{$g['varrun_path']}/xinetd.pid", "HUP");
		} else {
			mwexec("/usr/local/sbin/xinetd " .
			    "-syslog daemon " .
			    "-f {$g['varetc_path']}/xinetd.conf " .
			    "-pidfile {$g['varrun_path']}/xinetd.pid");
		}
	}

	return $natrules;
}

function filter_generate_user_rule_arr($rule) {
	global $config;
	update_filter_reload_status(sprintf(gettext("Creating filter rule %s ..."), $rule['descr']));
	$ret = array();
	$line = filter_generate_user_rule($rule);
	$ret['rule'] = $line;
	$ret['interface'] = $rule['interface'];
	if ($rule['descr'] != "" and $line != "") {
		$ret['descr'] = "label \"" . fix_rule_label("USER_RULE: {$rule['descr']}") . "\"";
	} else {
		$ret['descr'] = "label \"USER_RULE\"";
	}

	return $ret;
}

function filter_generate_port(& $rule, $target = "source", $isnat = false) {

	$src = "";

	$rule['protocol'] = strtolower($rule['protocol']);
	if (in_array($rule['protocol'], array("tcp", "udp", "tcp/udp"))) {
		if ($rule[$target]['port']) {
			$srcport = explode("-", $rule[$target]['port']);
			$srcporta = alias_expand($srcport[0]);
			if (!$srcporta) {
				log_error(sprintf(gettext('filter_generate_port: %1$s is not a valid %2$s port.'), $srcport[0], $target));
			} else if ((!$srcport[1]) || ($srcport[0] == $srcport[1])) {
				$src .= " port {$srcporta} ";
			} else if (($srcport[0] == 1) && ($srcport[1] == 65535)) {
			/* no need for a port statement here */
			} else if ($isnat) {
				$src .= " port {$srcport[0]}:{$srcport[1]}";
			} else {
				if (is_port($srcporta) && $srcport[1] == 65535) {
					$src .= " port >= {$srcporta} ";
				} else if ($srcport[0] == 1) {
					$src .= " port <= {$srcport[1]} ";
				} else {
					$srcport[0]--;
					$srcport[1]++;
					$src .= " port {$srcport[0]} >< {$srcport[1]} ";
				}
			}
		}
	}

	return $src;
}

function filter_address_add_vips_subnets(&$subnets, $if, $not) {
	global $FilterIflist;

	$if_subnets = array($subnets);

	if ($not == true) {
		$subnets = "!{$subnets}";
	}

	if (!isset($FilterIflist[$if]['vips']) || !is_array($FilterIflist[$if]['vips'])) {
		return;
	}

	foreach ($FilterIflist[$if]['vips'] as $vip) {
		foreach ($if_subnets as $subnet) {
			if (ip_in_subnet($vip['ip'], $subnet)) {
				continue 2;
			}
		}

		if (is_ipaddrv4($vip['ip'])) {
			if (!is_subnetv4($if_subnets[0])) {
				continue;
			}

			$network = gen_subnet($vip['ip'], $vip['sn']);
		} else if (is_ipaddrv6($vip['ip'])) {
			if (!is_subnetv6($if_subnets[0])) {
				continue;
			}

			$network = gen_subnetv6($vip['ip'], $vip['sn']);
		} else {
			continue;
		}

		$subnets .= ' ' . ($not == true ? '!' : '') . $network . '/' . $vip['sn'];
		$if_subnets[] = $network . '/' . $vip['sn'];
	}
	unset($if_subnets);

	if (strpos($subnets, ' ') !== false) {
		$subnets = "{ {$subnets} }";
	}
}

function filter_generate_address(& $rule, $target = "source", $isnat = false) {
	global $FilterIflist, $config;
	$src = "";

	if (isset($rule[$target]['any'])) {
		$src = "any";
	} else if ($rule[$target]['network']) {
		if (strstr($rule[$target]['network'], "opt")) {
			$optmatch = "";
			$matches = "";
			if ($rule['ipprotocol'] == "inet6") {
				if (preg_match("/opt([0-9]*)$/", $rule[$target]['network'], $optmatch)) {
					$opt_sa = $FilterIflist["opt{$optmatch[1]}"]['sav6'];
					if (!is_ipaddrv6($opt_sa)) {
						return "";
					}
					$src = $opt_sa . "/" . $FilterIflist["opt{$optmatch[1]}"]['snv6'];
				/* check for opt$NUMip here */
				} else if (preg_match("/opt([0-9]*)ip/", $rule[$target]['network'], $matches)) {
					$src = $FilterIflist["opt{$matches[1]}"]['ipv6'];
					if (!is_ipaddrv6($src)) {
						return "";
					}
					if (isset($rule[$target]['not'])) {
						$src = " !{$src}";
					}
				}
			} else {
				if (preg_match("/opt([0-9]*)$/", $rule[$target]['network'], $optmatch)) {
					$opt_sa = $FilterIflist["opt{$optmatch[1]}"]['sa'];
					if (!is_ipaddrv4($opt_sa)) {
						return "";
					}
					$src = $opt_sa . "/" . $FilterIflist["opt{$optmatch[1]}"]['sn'];
				/* check for opt$NUMip here */
				} else if (preg_match("/opt([0-9]*)ip/", $rule[$target]['network'], $matches)) {
					$src = $FilterIflist["opt{$matches[1]}"]['ip'];
					if (!is_ipaddrv4($src)) {
						return "";
					}
					if (isset($rule[$target]['not'])) {
						$src = " !{$src}";
					}
				}
			}
		} else {
			if ($rule['ipprotocol'] == "inet6") {
				switch ($rule[$target]['network']) {
					case 'wan':
						$wansa = $FilterIflist['wan']['sav6'];
						if (!is_ipaddrv6($wansa)) {
							return "";
						}
						$wansn = $FilterIflist['wan']['snv6'];
						$src = "{$wansa}/{$wansn}";
						break;
					case 'wanip':
						$src = $FilterIflist["wan"]['ipv6'];
						if (!is_ipaddrv6($src)) {
							return "";
						}
						break;
					case 'lanip':
						$src = $FilterIflist["lan"]['ipv6'];
						if (!is_ipaddrv6($src)) {
							return "";
						}
						break;
					case 'lan':
						$lansa = $FilterIflist['lan']['sav6'];
						if (!is_ipaddrv6($lansa)) {
							return "";
						}
						$lansn = $FilterIflist['lan']['snv6'];
						$src = "{$lansa}/{$lansn}";
						break;
					case '(self)':
						$src = "(self)";
						break;
					case 'pppoe':
						if (is_array($FilterIflist['pppoe'])) {
							$pppoesav6 = gen_subnetv6($FilterIflist['pppoe'][0]['ipv6'], $FilterIflist['pppoe'][0]['snv6']);
							$pppoesnv6 = $FilterIflist['pppoe'][0]['snv6'];
							$src = "{$pppoesav6}/{$pppoesnv6}";
						}
					}
				if (isset($rule[$target]['not']) && !is_subnet($src)) {
					$src = " !{$src}";
				}
			} else {
				switch ($rule[$target]['network']) {
					case 'wan':
						$wansa = $FilterIflist['wan']['sa'];
						if (!is_ipaddrv4($wansa)) {
							return "";
						}
						$wansn = $FilterIflist['wan']['sn'];
						$src = "{$wansa}/{$wansn}";
						break;
					case 'wanip':
						$src = $FilterIflist["wan"]['ip'];
						break;
					case 'lanip':
						$src = $FilterIflist["lan"]['ip'];
						break;
					case 'lan':
						$lansa = $FilterIflist['lan']['sa'];
						if (!is_ipaddrv4($lansa)) {
							return "";
						}
						$lansn = $FilterIflist['lan']['sn'];
						$src = "{$lansa}/{$lansn}";
						break;
					case '(self)':
						$src = "(self)";
						break;
					case 'pppoe':
						/* XXX: This needs to be fixed somehow! */
						if (is_array($FilterIflist['pppoe'])) {
							$pppoesa = gen_subnet($FilterIflist['pppoe'][0]['ip'], $FilterIflist['pppoe'][0]['sn']);
							$pppoesn = $FilterIflist['pppoe'][0]['sn'];
							$src = "{$pppoesa}/{$pppoesn}";
						}
						break;
				}
				if ((isset($rule[$target]['not'])) &&
				    (!is_subnet($src)) &&
				    (strpos($src, '{') === false)) {
					$src = " !{$src}";
				}
			}
		}
		if (is_subnet($src)) {
			filter_address_add_vips_subnets($src, $rule[$target]['network'], isset($rule[$target]['not']));
		}
	} else if ($rule[$target]['address']) {
		$expsrc = alias_expand($rule[$target]['address']);
		if (isset($rule[$target]['not'])) {
			$not = "!";
		} else {
			$not = "";
		}
		$src = " {$not} {$expsrc}";
	}

	if (empty($src)) {
		return '';
	}

	$src .= filter_generate_port($rule, $target, $isnat);

	return $src;
}

function filter_generate_user_rule($rule) {
	global $config, $g, $FilterIflist, $GatewaysList;
	global $dummynet_name_list;

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_generate_user_rule() being called $mt\n";
	}
	/* don't include disabled rules */
	if (isset($rule['disabled'])) {
		return "# rule " . $rule['descr'] . " disabled \n";
	}
	update_filter_reload_status(sprintf(gettext("Creating filter rules %s ..."), $rule['descr']));
	$int = "";
	$aline = array();

	/* Check to see if the interface is in our list */
	if (isset($rule['floating'])) {
		if (isset($rule['interface']) && $rule['interface'] <> "") {
			$interfaces = explode(",", $rule['interface']);
			$ifliste = "";
			foreach ($interfaces as $iface) {
				if (array_key_exists($iface, $FilterIflist)) {
					$ifliste .= " " . $FilterIflist[$iface]['if'] . " ";
				}
			}
			if ($ifliste <> "") {
				$aline['interface'] = " on { {$ifliste} } ";
			} else {
				$aline['interface'] = "";
			}
		} else {
			$aline['interface'] = "";
		}
	} else if (!array_key_exists($rule['interface'], $FilterIflist)) {
			foreach ($FilterIflist as $oc) {
				$items .= $oc['descr'] . " ";
			}
			return "# array key \"{$rule['interface']}\" does not exist for \"" . $rule['descr'] . "\" in array: {{$items}}";
	} else if ((array_key_exists($rule['interface'], $FilterIflist)) &&
	    (is_array($FilterIflist[$rule['interface']])) &&
	    (is_array($FilterIflist[$rule['interface']][0]))) {
		/* Currently the only case for this is the pppoe server. There should be an existing macro with this name. */
		$aline['interface'] = " on \$" . $rule['interface'] . " ";
	} else {
		$aline['interface'] = " on \$" . $FilterIflist[$rule['interface']]['descr'] . " ";
	}
	$ifcfg = $FilterIflist[$rule['interface']];

	switch ($rule['ipprotocol']) {
		case "inet":
			$aline['ipprotocol'] = "inet";
			break;
		case "inet6":
			$aline['ipprotocol'] = "inet6";
			break;
		default:
			$aline['ipprotocol'] = "";
			break;
	}

	/* check for unresolvable aliases */
	if ($rule['source']['address'] && !alias_expand($rule['source']['address'])) {
		$error_text = sprintf(gettext("Unresolvable source alias '%1\$s' for rule '%2\$s'"), $rule['source']['address'], $rule['descr']);
		file_notice("Filter_Reload", $error_text);
		return "# {$error_text}";
	}
	if ($rule['destination']['address'] && !alias_expand($rule['destination']['address'])) {
		$error_text = sprintf(gettext("Unresolvable destination alias '%1\$s' for rule '%2\$s'"), $rule['destination']['address'], $rule['descr']);
		file_notice("Filter_Reload", $error_text);
		return "# {$error_text}";
	}
	update_filter_reload_status(gettext("Setting up pass/block rules"));
	$type = $rule['type'];
	if ($type != "pass" && $type != "block" && $type != "reject" && $type != "match") {
		/* default (for older rules) is pass */
		$type = "pass";
	}
	if ($type == "reject") {
		$aline['type'] = "block return ";
	} else {
		$aline['type'] = $type . " ";
	}
	if (isset($rule['floating']) && $rule['floating'] == "yes") {
		if ($rule['direction'] != "any") {
			$aline['direction'] = " " . $rule['direction'] . " ";
		}
	} else {
		/* ensure the direction is in */
		$aline['direction'] = " in ";
	}
	if (isset($rule['log'])) {
		$aline['log'] = "log ";
	}
	if (!isset($rule['floating']) || isset($rule['quick'])) {
		$aline['quick'] = " quick ";
	}

	/* set the gateway interface */
	update_filter_reload_status(sprintf(gettext("Setting up pass/block rules %s"), $rule['descr']));

	/* do not process reply-to for gateway'd rules */
	if ($rule['gateway'] == "" && $aline['direction'] <> "" && (interface_has_gateway($rule['interface']) || interface_has_gatewayv6($rule['interface'])) && !isset($config['system']['disablereplyto']) && !isset($rule['disablereplyto']) && $type != "match") {
		if ($rule['ipprotocol'] == "inet6") {
			$rg = get_interface_gateway_v6($rule['interface']);
			if (is_ipaddrv6($rg)) {
				$aline['reply'] = "reply-to ( {$ifcfg['ifv6']} {$rg} ) ";
			}
		} else {
			$rg = get_interface_gateway($rule['interface']);
			if (is_ipaddrv4($rg)) {
				$aline['reply'] = "reply-to ( {$ifcfg['if']} {$rg} ) ";
			}
		}
	}
	/* if user has selected a custom gateway, lets work with it */
	else if ($rule['gateway'] <> "" && $type == "pass") {
		if (isset($GatewaysList[$rule['gateway']])) {
			/* Add the load balanced gateways */
			$aline['route'] = " \$GW{$rule['gateway']} ";
		} else if (isset($config['system']['skip_rules_gw_down'])) {
			return "# rule " . $rule['descr'] . " disabled because gateway " . $rule['gateway'] . " is down ";
		} else {
			log_error(sprintf(gettext("The gateway: %s is invalid or unknown, not using it."), $rule['gateway']));
		}
	}

	if (isset($rule['protocol']) && !empty($rule['protocol'])) {
		if ($rule['protocol'] == "tcp/udp") {
			$aline['prot'] = " proto { tcp udp } ";
		} elseif (($rule['protocol'] == "icmp") && ($rule['ipprotocol'] == "inet6")) {
			$aline['prot'] = " proto ipv6-icmp ";
		} elseif ($rule['protocol'] == "icmp") {
			$aline['prot'] = " proto icmp ";
		} else {
			$aline['prot'] = " proto {$rule['protocol']} ";
		}
	} else {
		if ($rule['source']['port'] <> "" || $rule['destination']['port'] <> "") {
			$aline['prot'] = " proto tcp ";
		}
	}
	update_filter_reload_status(sprintf(gettext("Creating rule %s"), $rule['descr']));

	/* source address */
	$src = trim(filter_generate_address($rule, "source"));
	if (empty($src) || ($src == "/")) {
		return "# at the break!";
	}
	$aline['src'] = " from $src ";

	/* OS signatures */
	if (($rule['protocol'] == "tcp") && ($rule['os'] <> "")) {
		$aline['os'] = " os \"{$rule['os']}\" ";
	}

	/* destination address */
	$dst = trim(filter_generate_address($rule, "destination"));
	if (empty($dst) || ($dst == "/")) {
		return "# returning at dst $dst == \"/\"";
	}
	$aline['dst'] = "to $dst ";

	if (($rule['protocol'] == "icmp") && $rule['icmptype'] && ($rule['ipprotocol'] == "inet")) {
		$aline['icmp-type'] = "icmp-type {$rule['icmptype']} ";
	}
	if (($rule['protocol'] == "icmp") && $rule['icmptype'] && ($rule['ipprotocol'] == "inet6")) {
		$aline['icmp6-type'] = "icmp6-type {$rule['icmptype']} ";
	}
	if (!empty($rule['tag'])) {
		$aline['tag'] = " tag \"" .$rule['tag']. "\" ";
	}
	if (!empty($rule['tagged'])) {
		$aline['tagged'] = " tagged \"" .$rule['tagged']. "\" ";
	}
	if (!empty($rule['dscp'])) {
		switch (strtolower($rule['dscp'])) {
			case 'va':
				$aline['dscp'] = " dscp \"44\" ";
				break;
			case 'VA':
				$aline['dscp'] = " dscp \"44\" ";
				break;
			case 'cs1':
				$aline['dscp'] = " dscp \"8\" ";
				break;
			case 'cs2':
				$aline['dscp'] = " dscp \"16\" ";
				break;
			case 'cs3':
				$aline['dscp'] = " dscp \"24\" ";
				break;
			case 'cs4':
				$aline['dscp'] = " dscp \"32\" ";
				break;
			case 'cs5':
				$aline['dscp'] = " dscp \"40\" ";
				break;
			case 'cs6':
				$aline['dscp'] = " dscp \"48\" ";
				break;
			case 'cs7':
				$aline['dscp'] = " dscp \"56\" ";
				break;
			default:
				$aline['dscp'] = " dscp " . $rule['dscp'] . " ";
				break;
		}
	}
	if (!empty($rule['vlanprio']) && ($rule['vlanprio'] != "none")) {
		$aline['vlanprio'] = " ieee8021q-pcp " . $rule['vlanprio'] . " ";
	}
	if (!empty($rule['vlanprioset']) && ($rule['vlanprioset'] != "none")) {
		$aline['vlanprioset'] = " ieee8021q-setpcp " . $rule['vlanprioset'] . " ";
	}
	if ($type == "pass") {
		if (isset($rule['allowopts'])) {
			$aline['allowopts'] = " allow-opts ";
		}
	}
	$aline['flags'] = "";
	if ($rule['protocol'] == "tcp") {
		if (isset($rule['tcpflags_any'])) {
			$aline['flags'] = "flags any ";
		} else if (!empty($rule['tcpflags2'])) {
			$aline['flags'] = "flags ";
			if (!empty($rule['tcpflags1'])) {
				$flags1 = explode(",", $rule['tcpflags1']);
				foreach ($flags1 as $flag1) {
					// CWR flag needs special treatment
					if ($flag1[0] == "c") {
						$aline['flags'] .= "W";
					} else {
						$aline['flags'] .= strtoupper($flag1[0]);
					}
				}
			}
			$aline['flags'] .= "/";
			if (!empty($rule['tcpflags2'])) {
				$flags2 = explode(",", $rule['tcpflags2']);
				foreach ($flags2 as $flag2) {
					// CWR flag needs special treatment
					if ($flag2[0] == "c") {
						$aline['flags'] .= "W";
					} else {
						$aline['flags'] .= strtoupper($flag2[0]);
					}
				}
			}
			$aline['flags'] .= " ";
		} else {
			$aline['flags'] = "flags S/SA ";
		}
	}
	if ($type == "pass") {
		/*
		 *	# keep state
		 *		works with TCP, UDP, and ICMP.
		 *	# modulate state
		 *		deprecated
		 *	# synproxy state
		 *		proxies incoming TCP connections to help protect servers from spoofed TCP SYN floods.
		 *	# none
		 *		do not use state mechanisms to keep track. this is only useful if your doing advanced
		 *		queueing in certain situations. please check the faq.
		 */
		$noadvoptions = false;
		if (isset($rule['statetype']) && $rule['statetype'] <> "") {
			switch ($rule['statetype']) {
				case "none":
					$noadvoptions = true;
					$aline['flags'] .= " no state ";
					break;
				case "modulate state":
				case "synproxy state":
					if ($rule['protocol'] == "tcp") {
						$aline['flags'] .= "{$rule['statetype']} ";
					}
					break;
				case "sloppy state":
					$aline['flags'] .= "keep state ";
					$rule['sloppy'] = true;
					break;
				default:
					$aline['flags'] .= "{$rule['statetype']} ";
					break;
			}
		} else {
			$aline['flags'] .= "keep state ";
		}

		if ($noadvoptions == false && isset($rule['nopfsync'])) {
			$rule['nopfsync'] = true;
		}

		if ($noadvoptions == false) {
			if ((isset($rule['source-track']) and $rule['source-track'] <> "") or
			    (isset($rule['max']) and $rule['max'] <> "") or
			    (isset($rule['max-src-nodes']) and $rule['max-src-nodes'] <> "") or
			    (isset($rule['max-src-states']) and $rule['max-src-states'] <> "") or
			    ((in_array($rule['protocol'], array("tcp", "tcp/udp"))) and
			     ((isset($rule['statetimeout']) and $rule['statetimeout'] <> "") or
			      (isset($rule['max-src-conn']) and $rule['max-src-conn'] <> "") or
			      (isset($rule['max-src-conn-rate']) and $rule['max-src-conn-rate'] <> "") or
			      (isset($rule['max-src-conn-rates']) and $rule['max-src-conn-rates'] <> ""))) or
			    (isset($rule['sloppy'])) or
			    (isset($rule['nopfsync']))) {
				$aline['flags'] .= "( ";
				if (isset($rule['sloppy'])) {
					$aline['flags'] .= "sloppy ";
				}
				if (isset($rule['nopfsync'])) {
					$aline['flags'] .= "no-sync ";
				}
				if (isset($rule['source-track']) and $rule['source-track'] <> "") {
					$aline['flags'] .= "source-track rule ";
				}
				if (isset($rule['max']) and $rule['max'] <> "") {
					$aline['flags'] .= "max " . $rule['max'] . " ";
				}
				if (isset($rule['max-src-nodes']) and $rule['max-src-nodes'] <> "") {
					$aline['flags'] .= "max-src-nodes " . $rule['max-src-nodes'] . " ";
				}
				if ((in_array($rule['protocol'], array("tcp", "tcp/udp"))) and
				    (isset($rule['max-src-conn'])) and
				    ($rule['max-src-conn'] <> "")) {
					$aline['flags'] .= "max-src-conn " . $rule['max-src-conn'] . " ";
				}
				if (isset($rule['max-src-states']) and $rule['max-src-states'] <> "") {
					$aline['flags'] .= "max-src-states " . $rule['max-src-states'] . " ";
				}
				if ((in_array($rule['protocol'], array("tcp", "tcp/udp"))) and
				    (isset($rule['statetimeout'])) and
				    ($rule['statetimeout'] <> "")) {
					$aline['flags'] .= "tcp.established " . $rule['statetimeout'] . " ";
				}
				if ((in_array($rule['protocol'], array("tcp", "tcp/udp"))) and
				    (isset($rule['max-src-conn-rate'])) and
				    ($rule['max-src-conn-rate'] <> "") and
				    (isset($rule['max-src-conn-rates'])) and
				    ($rule['max-src-conn-rates'] <> "")) {
					$aline['flags'] .= "max-src-conn-rate " . $rule['max-src-conn-rate'] . " ";
					$aline['flags'] .= "/" . $rule['max-src-conn-rates'] . ", overload <virusprot> flush global ";
				}

				$aline['flags'] .= " ) ";
			}
		}
	}
	if ($rule['defaultqueue'] <> "") {
		$aline['queue'] = " queue (".$rule['defaultqueue'];
		if ($rule['ackqueue'] <> "") {
			$aline['queue'] .= "," . $rule['ackqueue'];
		}
		$aline['queue'] .= ") ";
	}
	if ($rule['dnpipe'] <> "") {
		if (!empty($dummynet_name_list[$rule['dnpipe']])) {
			if ($dummynet_name_list[$rule['dnpipe']][0] == "?") {
				$aline['dnpipe'] = " dnqueue( ";
				$aline['dnpipe'] .= substr($dummynet_name_list[$rule['dnpipe']], 1);
				if ($rule['pdnpipe'] <> "") {
					$aline['dnpipe'] .= "," . substr($dummynet_name_list[$rule['pdnpipe']], 1);
				}
			} else {
				$aline['dnpipe'] = " dnpipe ( " . $dummynet_name_list[$rule['dnpipe']];
				if ($rule['pdnpipe'] <> "") {
					$aline['dnpipe'] .= "," . $dummynet_name_list[$rule['pdnpipe']];
				}
			}
			$aline['dnpipe'] .= ") ";
		}
	}

	/* is a time based rule schedule attached? */
	if (!empty($rule['sched']) && !empty($config['schedules'])) {
		$aline['schedlabel'] = "";
		foreach ($config['schedules']['schedule'] as $sched) {
			if ($sched['name'] == $rule['sched']) {
				if (!filter_get_time_based_rule_status($sched)) {
					if (!isset($config['system']['schedule_states'])) {
						mwexec("/sbin/pfctl -y {$sched['schedlabel']}");
					}
					return "# schedule finished - {$rule['descr']}";
				} else if ($g['debug']) {
					log_error(sprintf(gettext("[TDR DEBUG] status true -- rule type '%s'"), $type));
				}

				$aline['schedlabel'] = " schedule \"{$sched['schedlabel']}\" ";
				break;
			}
		}
	}

	if (!empty($rule['tracker'])) {
		$aline['tracker'] = "tracker {$rule['tracker']} ";
	}

	$line = "";
	/* exception(s) to a user rules can go here. */
	/* rules with a gateway or pool should create another rule for routing to vpns */
	if ((($aline['route'] <> "") && (trim($aline['type']) == "pass") && strstr($dst, "any")) && (!isset($config['system']['disablenegate']))) {
		/* negate VPN/PPTP/PPPoE/Static Route networks for load balancer/gateway rules */
		$negate_networks = " to <negate_networks> " . filter_generate_port($rule, "destination");
		$line .= $aline['type'] . $aline['direction'] . $aline['log'] . $aline['quick'] .
			$aline['interface'] . $aline['ipprotocol'] . $aline['prot'] . $aline['src'] . $aline['os'] .
			$negate_networks . $aline['icmp-type'] . $aline['icmp6-type'] . $aline['tag'] . $aline['tagged'] .
			$aline['vlanprio'] . $aline['vlanprioset'] . $aline['dscp'] . filter_negaterule_tracker() . $aline['allowopts'] . $aline['flags'] .
			$aline['queue'] . $aline['dnpipe'] . $aline['schedlabel'] .
			" label \"NEGATE_ROUTE: Negate policy routing for destination\"\n";

	}
	/* piece together the actual user rule */
	$line .= $aline['type'] . $aline['direction'] . $aline['log'] . $aline['quick'] . $aline['interface'] .
		$aline['reply'] . $aline['route'] . $aline['ipprotocol'] . $aline['prot'] . $aline['src'] . $aline['os'] . $aline['dst'] .
		$aline['icmp-type'] . $aline['icmp6-type'] . $aline['tag'] . $aline['tagged'] . $aline['dscp'] . $aline['tracker'] .
		$aline['vlanprio'] . $aline['vlanprioset'] . $aline['allowopts'] . $aline['flags'] . $aline['queue'] . $aline['dnpipe'] . $aline['schedlabel'];

	unset($aline);

	return $line;
}

function filter_rules_generate() {
	global $config, $g, $FilterIflist, $time_based_rules, $GatewaysList, $tracker;

	$fix_rule_label = 'fix_rule_label';
	$increment_tracker = 'filter_rule_tracker';

	update_filter_reload_status(gettext("Creating default rules"));
	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_rules_generate() being called $mt\n";
	}

	$ipfrules = "";
	$ipfrules .= discover_pkg_rules("pfearly");

	/* relayd */
	$ipfrules .= "anchor \"relayd/*\"\n";
	/* OpenVPN user rules from radius */
	$ipfrules .= "anchor \"openvpn/*\"\n";
	/* IPsec user rules from radius */
	$ipfrules .= "anchor \"ipsec/*\"\n";
	# BEGIN OF firewall rules
	/* default block logging? */
	$log = array();
	if (!isset($config['syslog']['nologdefaultblock'])) {
		$log['block'] = "log";
	}
	if (isset($config['syslog']['nologdefaultpass'])) {
		$log['pass'] = "log";
	}

	$saved_tracker = $tracker;

	if (!isset($config['system']['ipv6allow'])) {
		$ipfrules .= "# Allow IPv6 on loopback\n";
		$ipfrules .= "pass in {$log['pass']} quick on \$loopback inet6 all tracker {$increment_tracker($tracker)} label \"pass IPv6 loopback\"\n";
		$ipfrules .= "pass out {$log['pass']} quick on \$loopback inet6 all tracker {$increment_tracker($tracker)} label \"pass IPv6 loopback\"\n";
		$ipfrules .= "# Block all IPv6\n";
		$ipfrules .= "block in {$log['block']} quick inet6 all tracker {$increment_tracker($tracker)} label \"Block all IPv6\"\n";
		$ipfrules .= "block out {$log['block']} quick inet6 all tracker {$increment_tracker($tracker)} label \"Block all IPv6\"\n";
	}

	$saved_tracker += 100;
	$tracker = $saved_tracker;

	if (!isset($config['system']['no_apipa_block'])) {
		$ipfrules .= <<<EOD
# block IPv4 link-local. Per RFC 3927, link local "MUST NOT" be forwarded by a routing device,
# and clients "MUST NOT" send such packets to a router. FreeBSD won't route 169.254./16, but
# route-to can override that, causing problems such as in redmine #2073
block in {$log['block']} quick from 169.254.0.0/16 to any tracker {$increment_tracker($tracker)} label "Block IPv4 link-local"
block in {$log['block']} quick from any to 169.254.0.0/16 tracker {$increment_tracker($tracker)} label "Block IPv4 link-local"

EOD;
	}

	$ipfrules .= <<<EOD
#---------------------------------------------------------------------------
# default deny rules
#---------------------------------------------------------------------------
block in {$log['block']} inet all tracker {$increment_tracker($tracker)} label "Default deny rule IPv4"
block out {$log['block']} inet all tracker {$increment_tracker($tracker)} label "Default deny rule IPv4"
block in {$log['block']} inet6 all tracker {$increment_tracker($tracker)} label "Default deny rule IPv6"
block out {$log['block']} inet6 all tracker {$increment_tracker($tracker)} label "Default deny rule IPv6"

# IPv6 ICMP is not auxilary, it is required for operation
# See man icmp6(4)
# 1    unreach         Destination unreachable
# 2    toobig          Packet too big
# 128  echoreq         Echo service request
# 129  echorep         Echo service reply
# 133  routersol       Router solicitation
# 134  routeradv       Router advertisement
# 135  neighbrsol      Neighbor solicitation
# 136  neighbradv      Neighbor advertisement
pass {$log['pass']} quick inet6 proto ipv6-icmp from any to any icmp6-type {1,2,135,136} tracker {$increment_tracker($tracker)} keep state

# Allow only bare essential icmpv6 packets (NS, NA, and RA, echoreq, echorep)
pass out {$log['pass']} quick inet6 proto ipv6-icmp from fe80::/10 to fe80::/10 icmp6-type {129,133,134,135,136} tracker {$increment_tracker($tracker)} keep state
pass out {$log['pass']} quick inet6 proto ipv6-icmp from fe80::/10 to ff02::/16 icmp6-type {129,133,134,135,136} tracker {$increment_tracker($tracker)} keep state
pass in {$log['pass']} quick inet6 proto ipv6-icmp from fe80::/10 to fe80::/10 icmp6-type {128,133,134,135,136} tracker {$increment_tracker($tracker)} keep state
pass in {$log['pass']} quick inet6 proto ipv6-icmp from ff02::/16 to fe80::/10 icmp6-type {128,133,134,135,136} tracker {$increment_tracker($tracker)} keep state
pass in {$log['pass']} quick inet6 proto ipv6-icmp from fe80::/10 to ff02::/16 icmp6-type {128,133,134,135,136} tracker {$increment_tracker($tracker)} keep state

# We use the mighty pf, we cannot be fooled.
block {$log['block']} quick inet proto { tcp, udp } from any port = 0 to any tracker {$increment_tracker($tracker)} label "Block traffic from port 0"
block {$log['block']} quick inet proto { tcp, udp } from any to any port = 0 tracker {$increment_tracker($tracker)} label "Block traffic to port 0"
block {$log['block']} quick inet6 proto { tcp, udp } from any port = 0 to any tracker {$increment_tracker($tracker)} label "Block traffic from port 0"
block {$log['block']} quick inet6 proto { tcp, udp } from any to any port = 0 tracker {$increment_tracker($tracker)} label "Block traffic to port 0"

# Snort package
block {$log['block']} quick from <snort2c> to any tracker {$increment_tracker($tracker)} label "Block snort2c hosts"
block {$log['block']} quick from any to <snort2c> tracker {$increment_tracker($tracker)} label "Block snort2c hosts"

EOD;

	$saved_tracker += 100;
	$tracker = $saved_tracker;

	$ipfrules .= filter_process_carp_rules($log);

	$saved_tracker += 100;
	$tracker = $saved_tracker;

	$ipfrules .= "\n# SSH lockout\n";
	if (is_array($config['system']['ssh']) && !empty($config['system']['ssh']['port'])) {
		$ipfrules .= "block in {$log['block']} quick proto tcp from <sshlockout> to (self) port ";
		$ipfrules .= $config['system']['ssh']['port'];
		$ipfrules .= " tracker {$increment_tracker($tracker)} label \"sshlockout\"\n";
	} else {
		if ($config['system']['ssh']['port'] <> "") {
			$sshport = $config['system']['ssh']['port'];
		} else {
			$sshport = 22;
		}
		if ($sshport) {
			$ipfrules .= "block in {$log['block']} quick proto tcp from <sshlockout> to (self) port {$sshport} tracker {$increment_tracker($tracker)} label \"sshlockout\"\n";
		}
	}

	$saved_tracker += 50;
	$tracker = $saved_tracker;

	$ipfrules .= "\n# webConfigurator lockout\n";
	if (!$config['system']['webgui']['port']) {
		if ($config['system']['webgui']['protocol'] == "http") {
			$webConfiguratorlockoutport = "80";
		} else {
			$webConfiguratorlockoutport = "443";
		}
	} else {
		$webConfiguratorlockoutport = $config['system']['webgui']['port'];
	}
	if ($webConfiguratorlockoutport) {
		$ipfrules .= "block in {$log['block']} quick proto tcp from <webConfiguratorlockout> to (self) port {$webConfiguratorlockoutport} tracker {$increment_tracker($tracker)} label \"webConfiguratorlockout\"\n";
	}

	$saved_tracker += 100;
	$tracker = $saved_tracker;

	/*
	 * Support for allow limiting of TCP connections by establishment rate
	 * Useful for protecting against sudden outbursts, etc.
	 */
	$ipfrules .= "block in {$log['block']} quick from <virusprot> to any tracker 1000000400 label \"virusprot overload table\"\n";

	$saved_tracker += 100;
	$tracker = $saved_tracker;

	/* if captive portal is enabled, ensure that access to this port
	 * is allowed on a locked down interface
	 */
	if (is_array($config['captiveportal'])) {
		foreach ($config['captiveportal'] as $cpcfg) {
			if (!isset($cpcfg['enable'])) {
				continue;
			}
			$cpinterfaces = explode(",", $cpcfg['interface']);
			$cpiflist = array();
			$cpiplist = array();
			foreach ($cpinterfaces as $cpifgrp) {
				if (!isset($FilterIflist[$cpifgrp])) {
					continue;
				}
				$tmpif = get_real_interface($cpifgrp);
				if (!empty($tmpif)) {
					$cpiflist[] = "{$tmpif}";
					$cpipm = get_interface_ip($cpifgrp);
					if (is_ipaddr($cpipm)) {
						$cpiplist[] = $cpipm;
						if (!is_array($config['virtualip']) || !is_array($config['virtualip']['vip'])) {
							continue;
						}
						foreach ($config['virtualip']['vip'] as $vip) {
							if (($vip['interface'] == $cpifgrp) && (($vip['mode'] == "carp") || ($vip['mode'] == "ipalias"))) {
								$cpiplist[] = $vip['subnet'];
							}
						}
					}
				}
			}
			if (count($cpiplist) > 0 && count($cpiflist) > 0) {
				$cpinterface = implode(" ", $cpiflist);
				$cpaddresses = implode(" ", $cpiplist);
				$listenporthttps = $cpcfg['listenporthttps'] ? $cpcfg['listenporthttps'] : 8000 + ($cpcfg['zoneid'] + 1);
				$listenporthttp  = $cpcfg['listenporthttp']  ? $cpcfg['listenporthttp']  : 8000 + $cpcfg['zoneid'];
				$portalias = $listenporthttps;
				$portalias .= " {$listenporthttp}";
				$ipfrules .= "pass in {$log['pass']} quick on { {$cpinterface} } proto tcp from any to { {$cpaddresses} } port { {$portalias} } tracker {$increment_tracker($tracker)} keep state(sloppy)\n";
				$ipfrules .= "pass out {$log['pass']} quick on { {$cpinterface} } proto tcp from any to any flags any tracker {$increment_tracker($tracker)} keep state(sloppy)\n";
			}
		}
	}

	$bogontableinstalled = 0;
	foreach ($FilterIflist as $on => $oc) {
		$saved_tracker += 10;
		$tracker = $saved_tracker;

		if (isset($config['system']['ipv6allow']) && ($oc['type6'] == "slaac" || $oc['type6'] == "dhcp6")) {
			// The DHCPv6 client rules ***MUST BE ABOVE BOGONSV6!***  https://redmine.pfsense.org/issues/3395
			$ipfrules .= <<<EOD
# allow our DHCPv6 client out to the {$oc['descr']}
pass in {$log['pass']} quick on \${$oc['descr']} proto udp from fe80::/10 port = 546 to fe80::/10 port = 546 tracker {$increment_tracker($tracker)} label "{$fix_rule_label("allow dhcpv6 client in {$oc['descr']}")}"
pass in {$log['pass']} quick on \${$oc['descr']} proto udp from any port = 547 to any port = 546 tracker {$increment_tracker($tracker)} label "{$fix_rule_label("allow dhcpv6 client in {$oc['descr']}")}"
pass out {$log['pass']} quick on \${$oc['descr']} proto udp from any port = 546 to any port = 547 tracker {$increment_tracker($tracker)} label "{$fix_rule_label("allow dhcpv6 client out {$oc['descr']}")}"

EOD;
		}

		/* XXX: Not static but give a step of 1000 for each interface to at least be able to match rules. */
		$saved_tracker += 1000;
		$tracker = $saved_tracker;

		/* block bogon networks */
		/* http://www.cymru.com/Documents/bogon-bn-nonagg.txt */
		/* file is automatically in cron every 3000 minutes */
		if (!isset($config['syslog']['nologbogons'])) {
			$bogonlog = "log";
		} else {
			$bogonlog = "";
		}

		if (isset($config['interfaces'][$on]['blockbogons'])) {
			$bogons_tracker = BOGONS_TRACKER;
			$ipfrules .= <<<EOD
# block bogon networks (IPv4)
# http://www.cymru.com/Documents/bogon-bn-nonagg.txt
block in $bogonlog quick on \${$oc['descr']} from <bogons> to any tracker $bogons_tracker label "{$fix_rule_label("block bogon IPv4 networks from {$oc['descr']}")}"

EOD;

			if (isset($config['system']['ipv6allow'])) {
				$ipfrules .= <<<EOD
# block bogon networks (IPv6)
# http://www.team-cymru.org/Services/Bogons/fullbogons-ipv6.txt
block in $bogonlog quick on \${$oc['descr']} from <bogonsv6> to any tracker $bogons_tracker label "{$fix_rule_label("block bogon IPv6 networks from {$oc['descr']}")}"

EOD;
			}
		}

		$saved_tracker += 10;
		$tracker = $saved_tracker;

		$isbridged = false;
		if (is_array($config['bridges']['bridged'])) {
			foreach ($config['bridges']['bridged'] as $oc2) {
				if (stristr($oc2['members'], $on)) {
					$isbridged = true;
					break;
				}
			}
		}

		if ($oc['ip'] && !($isbridged) && isset($oc['spoofcheck'])) {
			$ipfrules .= filter_rules_spoofcheck_generate($on, $oc, $log);
		}

		/* block private networks ? */
		if (!isset($config['syslog']['nologprivatenets'])) {
			$privnetlog = "log";
		} else {
			$privnetlog = "";
		}

		$saved_tracker += 10;
		$tracker = $saved_tracker;

		if (isset($config['interfaces'][$on]['blockpriv'])) {
			if ($isbridged == false) {
				$rfc1918_tracker = RFC1918_TRACKER;
				$ipfrules .= <<<EOD
# block anything from private networks on interfaces with the option set
block in $privnetlog quick on \${$oc['descr']} from 10.0.0.0/8 to any tracker $rfc1918_tracker label "{$fix_rule_label("Block private networks from {$oc['descr']} block 10/8")}"
block in $privnetlog quick on \${$oc['descr']} from 127.0.0.0/8 to any tracker $rfc1918_tracker label "{$fix_rule_label("Block private networks from {$oc['descr']} block 127/8")}"
block in $privnetlog quick on \${$oc['descr']} from 172.16.0.0/12 to any tracker $rfc1918_tracker label "{$fix_rule_label("Block private networks from {$oc['descr']} block 172.16/12")}"
block in $privnetlog quick on \${$oc['descr']} from 192.168.0.0/16 to any tracker $rfc1918_tracker label "{$fix_rule_label("Block private networks from {$oc['descr']} block 192.168/16")}"
block in $privnetlog quick on \${$oc['descr']} from fc00::/7 to any tracker $rfc1918_tracker label "{$fix_rule_label("Block ULA networks from {$oc['descr']} block fc00::/7")}"

EOD;
			}
		}

		$saved_tracker += 10;
		$tracker = $saved_tracker;

		switch ($oc['type']) {
			case "pptp":
				$ipfrules .= <<<EOD
# allow PPTP client
pass in {$log['pass']} on \${$oc['descr']} proto gre from any to any keep state tracker {$increment_tracker($tracker)} label "{$fix_rule_label("allow PPTP client on {$oc['descr']}")}"

EOD;
				break;
			case "dhcp":
				$ipfrules .= <<<EOD
# allow our DHCP client out to the {$oc['descr']}
pass in {$log['pass']} on \${$oc['descr']} proto udp from any port = 67 to any port = 68 tracker {$increment_tracker($tracker)} label "{$fix_rule_label("allow dhcp client out {$oc['descr']}")}"
pass out {$log['pass']} on \${$oc['descr']} proto udp from any port = 68 to any port = 67 tracker {$increment_tracker($tracker)} label "{$fix_rule_label("allow dhcp client out {$oc['descr']}")}"
# Not installing DHCP server firewall rules for {$oc['descr']} which is configured for DHCP.

EOD;

				break;
			case "pppoe":
			case "none":
			/* XXX: Nothing to do in this case?! */
				break;
			default:
			/* allow access to DHCP server on interfaces */
				if (isset($config['dhcpd'][$on]['enable'])) {
					$ipfrules .= <<<EOD
# allow access to DHCP server on {$oc['descr']}
pass in {$log['pass']} quick on \${$oc['descr']} proto udp from any port = 68 to 255.255.255.255 port = 67 tracker {$increment_tracker($tracker)} label "allow access to DHCP server"

EOD;
					if (is_ipaddrv4($oc['ip'])) {
						$ipfrules .= <<<EOD
pass in {$log['pass']} quick on \${$oc['descr']} proto udp from any port = 68 to {$oc['ip']} port = 67 tracker {$increment_tracker($tracker)} label "allow access to DHCP server"
pass out {$log['pass']} quick on \${$oc['descr']} proto udp from {$oc['ip']} port = 67 to any port = 68 tracker {$increment_tracker($tracker)} label "allow access to DHCP server"

EOD;
					}

					if (is_ipaddrv4($oc['ip']) && $config['dhcpd'][$on]['failover_peerip'] <> "") {
						$ipfrules .= <<<EOD
# allow access to DHCP failover on {$oc['descr']} from {$config['dhcpd'][$on]['failover_peerip']}
pass in {$log['pass']} quick on \${$oc['descr']} proto { tcp udp } from {$config['dhcpd'][$on]['failover_peerip']} to {$oc['ip']} port = 519 tracker {$increment_tracker($tracker)} label "allow access to DHCP failover"
pass in {$log['pass']} quick on \${$oc['descr']} proto { tcp udp } from {$config['dhcpd'][$on]['failover_peerip']} to {$oc['ip']} port = 520 tracker {$increment_tracker($tracker)} label "allow access to DHCP failover"

EOD;
					}

				}
				/* allow access to DHCP relay on interfaces */
				if (isset($config['dhcrelay']['enable'])) {
					$dhcifaces = explode(",", $dhcrelaycfg['interface']);
					foreach ($dhcifaces as $dhcrelayif) {
						if ($dhcrelayif == $on) {
							$ipfrules .= <<<EOD
# allow access to DHCP relay on {$oc['descr']}
pass in {$log['pass']} quick on \${$oc['descr']} proto udp from any port = 68 to 255.255.255.255 port = 67 tracker {$increment_tracker($tracker)} label "allow access to DHCP relay"

EOD;
						}
					}
				}
				break;
		}

		$saved_tracker += 10;
		$tracker = $saved_tracker;
		switch ($oc['type6']) {
			case "6rd":
			    if (is_ipaddrv4($config['interfaces'][$on]['gateway-6rd'])) {
				$ipfrules .= <<<EOD
# allow our proto 41 traffic from the 6RD border relay in
pass in {$log['pass']} on \${$oc['descr']} proto 41 from {$config['interfaces'][$on]['gateway-6rd']} to any tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6in4 traffic in for 6rd on {$oc['descr']}")}"
pass out {$log['pass']} on \${$oc['descr']} proto 41 from any to {$config['interfaces'][$on]['gateway-6rd']} tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6in4 traffic out for 6rd on {$oc['descr']}")}"

EOD;
			    }

				/* XXX: Really need to allow 6rd traffic coming in for v6 this is against default behaviour! */
				if (0 && is_ipaddrv6($oc['ipv6'])) {
					$ipfrules .= <<<EOD
pass in {$log['pass']} on \${$oc['descr']} inet6 from any to {$oc['ipv6']}/{$oc['snv6']} tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6rd traffic in for 6rd on {$oc['descr']}")}"
pass out {$log['pass']} on \${$oc['descr']} inet6 from {$oc['ipv6']}/{$oc['snv6']} to any tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6rd traffic out for 6rd on {$oc['descr']}")}"

EOD;
				}
				break;
			case "6to4":
				if (is_ipaddrv4($oc['ip'])) {
					$ipfrules .= <<<EOD
# allow our proto 41 traffic from the 6to4 border relay in
pass in {$log['pass']} on \${$oc['descr']} proto 41 from any to {$oc['ip']} tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6in4 traffic in for 6to4 on {$oc['descr']}")}"
pass out {$log['pass']} on \${$oc['descr']} proto 41 from {$oc['ip']} to any tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6in4 traffic out for 6to4 on {$oc['descr']}")}"

EOD;
				}
				/* XXX: Really need to allow 6to4 traffic coming in for v6 this is against default behaviour! */
				if (0 && is_ipaddrv6($oc['ipv6'])) {
					$ipfrules .= <<<EOD
pass in {$log['pass']} on \${$oc['descr']} inet6 from any to {$oc['ipv6']}/{$oc['snv6']} tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6in4 traffic in for 6to4 on {$oc['descr']}")}"
pass out {$log['pass']} on \${$oc['descr']} inet6 from {$oc['ipv6']}/{$oc['snv6']} to any tracker {$increment_tracker($tracker)} label "{$fix_rule_label("Allow 6in4 traffic out for 6to4 on {$oc['descr']}")}"

EOD;
				}
				break;
			default:
				if ((is_array($config['dhcpdv6'][$on]) && isset($config['dhcpdv6'][$on]['enable'])) ||
				    (isset($oc['track6-interface'])) ||
				    (is_array($config['dhcrelay6']) && !empty($config['dhcrelay6']['interface']) && in_array($on, explode(',', $config['dhcrelay6']['interface'])))) {
					$ipfrules .= <<<EOD
# allow access to DHCPv6 server on {$oc['descr']}
# We need inet6 icmp for stateless autoconfig and dhcpv6
pass {$log['pass']} quick on \${$oc['descr']} inet6 proto udp from fe80::/10 to fe80::/10 port = 546 tracker {$increment_tracker($tracker)} label "allow access to DHCPv6 server"
pass {$log['pass']} quick on \${$oc['descr']} inet6 proto udp from fe80::/10 to ff02::/16 port = 546 tracker {$increment_tracker($tracker)} label "allow access to DHCPv6 server"
pass {$log['pass']} quick on \${$oc['descr']} inet6 proto udp from fe80::/10 to ff02::/16 port = 547 tracker {$increment_tracker($tracker)} label "allow access to DHCPv6 server"
pass {$log['pass']} quick on \${$oc['descr']} inet6 proto udp from ff02::/16 to fe80::/10 port = 547 tracker {$increment_tracker($tracker)} label "allow access to DHCPv6 server"

EOD;
					if (is_ipaddrv6($oc['ipv6'])) {
						$ipfrules .= <<<EOD
pass in {$log['pass']} quick on \${$oc['descr']} inet6 proto udp from fe80::/10 to {$oc['ipv6']} port = 546 tracker {$increment_tracker($tracker)} label "allow access to DHCPv6 server"
pass out {$log['pass']} quick on \${$oc['descr']} inet6 proto udp from {$oc['ipv6']} port = 547 to fe80::/10 tracker {$increment_tracker($tracker)} label "allow access to DHCPv6 server"

EOD;
					}
				}
				break;
		}
	}

	$saved_tracker += 10;
	$tracker = $saved_tracker;

	/*
	 * NB: The loopback rules are needed here since the antispoof would take precedence then.
	 *	If you ever add the 'quick' keyword to the antispoof rules above move the loopback
	 *	rules before them.
	 */
	$ipfrules .= <<<EOD

# loopback
pass in {$log['pass']} on \$loopback inet all tracker {$increment_tracker($tracker)} label "pass IPv4 loopback"
pass out {$log['pass']} on \$loopback inet all tracker {$increment_tracker($tracker)} label "pass IPv4 loopback"
pass in {$log['pass']} on \$loopback inet6 all tracker {$increment_tracker($tracker)} label "pass IPv6 loopback"
pass out {$log['pass']} on \$loopback inet6 all tracker {$increment_tracker($tracker)} label "pass IPv6 loopback"
# let out anything from the firewall host itself and decrypted IPsec traffic
pass out {$log['pass']} inet all keep state allow-opts tracker {$increment_tracker($tracker)} label "let out anything IPv4 from firewall host itself"
pass out {$log['pass']} inet6 all keep state allow-opts tracker {$increment_tracker($tracker)} label "let out anything IPv6 from firewall host itself"

EOD;

	$saved_tracker += 100;
	$tracker = $saved_tracker;
	foreach ($FilterIflist as $ifdescr => $ifcfg) {
		if (isset($ifcfg['virtual'])) {
			continue;
		}

		$gw = get_interface_gateway($ifdescr);
		if (is_ipaddrv4($gw) && is_ipaddrv4($ifcfg['ip'])) {
			$ipfrules .= "pass out {$log['pass']} route-to ( {$ifcfg['if']} {$gw} ) from {$ifcfg['ip']} to !{$ifcfg['sa']}/{$ifcfg['sn']} tracker {$increment_tracker($tracker)} keep state allow-opts label \"let out anything from firewall host itself\"\n";
			if (is_array($ifcfg['vips'])) {
				foreach ($ifcfg['vips'] as $vip) {
					if (ip_in_subnet($vip['ip'], "{$ifcfg['sa']}/{$ifcfg['sn']}")) {
						$ipfrules .= "pass out {$log['pass']} route-to ( {$ifcfg['if']} {$gw} ) from {$vip['ip']} to !{$ifcfg['sa']}/{$ifcfg['sn']} tracker {$increment_tracker($tracker)} keep state allow-opts label \"let out anything from firewall host itself\"\n";
					} else {
						$ipfrules .= "pass out {$log['pass']} route-to ( {$ifcfg['if']} {$gw} ) from {$vip['ip']} to !" . gen_subnet($vip['ip'], $vip['sn']) . "/{$vip['sn']} tracker {$increment_tracker($tracker)} keep state allow-opts label \"let out anything from firewall host itself\"\n";
					}
				}
			}
		}

		$gwv6 = get_interface_gateway_v6($ifdescr);
		$stf = get_real_interface($ifdescr, "inet6");
		$pdlen = 64 - calculate_ipv6_delegation_length($ifdescr);
		if (is_ipaddrv6($gwv6) && is_ipaddrv6($ifcfg['ipv6'])) {
			$ipfrules .= "pass out {$log['pass']} route-to ( {$stf} {$gwv6} ) inet6 from {$ifcfg['ipv6']} to !{$ifcfg['ipv6']}/{$pdlen} tracker {$increment_tracker($tracker)} keep state allow-opts label \"let out anything from firewall host itself\"\n";
			if (is_array($ifcfg['vips6'])) {
				foreach ($ifcfg['vips6'] as $vip) {
					$ipfrules .= "pass out {$log['pass']} route-to ( {$stf} {$gwv6} ) inet6 from {$vip['ip']} to !{$vip['ip']}/{$pdlen} tracker {$increment_tracker($tracker)} keep state allow-opts label \"let out anything from firewall host itself\"\n";
				}
			}
		}
	}


	$saved_tracker += 300;
	$tracker = $saved_tracker;
	/* add ipsec interfaces */
	if (!function_exists('ipsec_enabled')) {
		require_once("ipsec.inc");
	}
	if (ipsec_enabled()) {
		$ipfrules .= "pass out {$log['pass']} on \$IPsec all tracker {$increment_tracker($tracker)} tracker {$increment_tracker($tracker)} keep state label \"IPsec internal host to host\"\n";
	}

	$saved_tracker += 10;
	$tracker = $saved_tracker;
	if (is_array($config['system']['webgui']) && !isset($config['system']['webgui']['noantilockout'])) {
		$alports = filter_get_antilockout_ports();

		$lockout_tracker = ANTILOCKOUT_TRACKER;
		if (count($config['interfaces']) > 1 && !empty($FilterIflist['lan']['if'])) {
			/* if antilockout is enabled, LAN exists and has
			 * an IP and subnet mask assigned
			 */
			$lanif = $FilterIflist['lan']['if'];
			$ipfrules .= <<<EOD
# make sure the user cannot lock himself out of the webConfigurator or SSH
pass in {$log['pass']} quick on {$lanif} proto tcp from any to ({$lanif}) port { {$alports} } tracker $lockout_tracker keep state label "anti-lockout rule"

EOD;
		} else if (count($config['interfaces']) == 1) {
			/* single-interface deployment, add to WAN	*/
			$wanif = $FilterIflist["wan"]['if'];
			$ipfrules .= <<<EOD
# make sure the user cannot lock himself out of the webConfigurator or SSH
pass in {$log['pass']} quick on {$wanif} proto tcp from any to ({$wanif}) port { {$alports} } tracker $lockout_tracker keep state label "anti-lockout rule"

EOD;
		}
		unset($alports);
	}

	$saved_tracker += 10;
	$tracker = $saved_tracker;
	if (isset($config['nat']['rule']) && is_array($config['nat']['rule'])) {
		foreach ($config['nat']['rule'] as $rule) {
			if ((!isset($config['system']['disablenatreflection']) || $rule['natreflection'] == "enable") &&
			    ($rule['natreflection'] != "disable")) {
				$ipfrules .= "# NAT Reflection rules\n";
				$ipfrules .= <<<EOD
pass in {$log['pass']} inet tagged PFREFLECT tracker {$increment_tracker($tracker)} keep state label "NAT REFLECT: Allow traffic to localhost"

EOD;
				break;
			}
		}
	}

	if (isset($config['filter']['rule'])) {
		/* Pre-cache all our rules so we only have to generate them once */
		$rule_arr1 = array();
		$rule_arr2 = array();
		$rule_arr3 = array();
		$vpn_and_ppp_ifs = array("l2tp", "pptp", "pppoe", "enc0", "openvpn");
		/*
		 * NB: The order must be: Floating rules, then interface group and then regular ones.
		 */
		foreach ($config['filter']['rule'] as $rule) {
			update_filter_reload_status("Pre-caching {$rule['descr']}...");
			if (isset ($rule['disabled'])) {
				continue;
			}

			// Webgui separator bar. Not a real rule
			if (isset($rule['separator'])) {
				continue;
			}

			if (!empty($rule['ipprotocol']) && $rule['ipprotocol'] == "inet46") {
				if (isset($rule['floating'])) {
					$rule['ipprotocol'] = "inet";
					$rule_arr1[] = filter_generate_user_rule_arr($rule);
					$rule['ipprotocol'] = "inet6";
					$rule_arr1[] = filter_generate_user_rule_arr($rule);
				} else if (is_interface_group($rule['interface']) || in_array($rule['interface'], $vpn_and_ppp_ifs)) {
					$rule['ipprotocol'] = "inet";
					$rule_arr2[] = filter_generate_user_rule_arr($rule);
					$rule['ipprotocol'] = "inet6";
					$rule_arr2[] = filter_generate_user_rule_arr($rule);
				} else {
					$rule['ipprotocol'] = "inet";
					$rule_arr3[] = filter_generate_user_rule_arr($rule);
					$rule['ipprotocol'] = "inet6";
					$rule_arr3[] = filter_generate_user_rule_arr($rule);
				}
				$rule['ipprotocol'] = "inet46";
			} else {
				if (isset($rule['floating'])) {
					$rule_arr1[] = filter_generate_user_rule_arr($rule);
				} else if (is_interface_group($rule['interface']) || in_array($rule['interface'], $vpn_and_ppp_ifs)) {
					$rule_arr2[] = filter_generate_user_rule_arr($rule);
				} else {
					$rule_arr3[] = filter_generate_user_rule_arr($rule);
				}
			}
			if ($rule['sched']) {
				$time_based_rules = true;
			}
		}

		$ipfrules .= "\n# User-defined rules follow\n";
		$ipfrules .= "\nanchor \"userrules/*\"\n";
		/* Generate user rule lines */
		foreach ($rule_arr1 as $rule) {
			if (isset($rule['disabled'])) {
				continue;
			}
			if (!$rule['rule']) {
				continue;
			}
			$ipfrules .= "{$rule['rule']} {$rule['descr']}\n";
		}
		foreach ($rule_arr2 as $rule) {
			if (isset($rule['disabled'])) {
				continue;
			}
			if (!$rule['rule']) {
				continue;
			}
			$ipfrules .= "{$rule['rule']} {$rule['descr']}\n";
		}
		foreach ($rule_arr3 as $rule) {
			if (isset($rule['disabled'])) {
				continue;
			}
			if (!$rule['rule']) {
				continue;
			}
			$ipfrules .= "{$rule['rule']} {$rule['descr']}\n";
		}
		unset($rule_arr1, $rule_arr2, $rule_arr3);
	}

	$saved_tracker += 100;
	$tracker = $saved_tracker;

	/*  pass traffic between statically routed subnets and the subnet on the
	 *  interface in question to avoid problems with complicated routing
	 *  topologies
	 */
	if (isset($config['filter']['bypassstaticroutes']) && is_array($config['staticroutes']['route']) && count($config['staticroutes']['route'])) {
		$ipfrules .= "# Add rules to bypass firewall rules for static routes\n";
		foreach (get_staticroutes() as $route) {
			$friendly = $GatewaysList[$route['gateway']]['friendlyiface'];
			if (is_array($FilterIflist[$friendly])) {
				$oc = $FilterIflist[$friendly];
				$routeent = explode("/", $route['network']);
				unset($sa);
				if (is_ipaddrv4($oc['ip'])) {
					$sa = $oc['sa'];
					$sn = $oc['sn'];
				}
				if ($sa && is_ipaddrv4($routeent[0])) {
					$ipfrules .= <<<EOD
pass {$log['pass']} quick on \${$oc['descr']} proto tcp from {$sa}/{$sn} to {$route['network']} flags any tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"
pass {$log['pass']} quick on \${$oc['descr']} from {$sa}/{$sn} to {$route['network']} tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"
pass {$log['pass']} quick on \${$oc['descr']} proto tcp from {$route['network']} to {$sa}/{$sn} flags any tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"
pass {$log['pass']} quick on \${$oc['descr']} from {$route['network']} to {$sa}/{$sn} tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"

EOD;
				}
				unset($sa);
				if (is_ipaddrv6($oc['ipv6'])) {
					$sa = $oc['sav6'];
					$sn = $oc['snv6'];
				}
				if ($sa && is_ipaddrv6($routeent[0])) {
					$ipfrules .= <<<EOD
pass {$log['pass']} quick on \${$oc['descr']} inet6 proto tcp from {$sa}/{$sn} to {$route['network']} flags any tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"
pass {$log['pass']} quick on \${$oc['descr']} inet6 from {$sa}/{$sn} to {$route['network']} tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"
pass {$log['pass']} quick on \${$oc['descr']} inet6 proto tcp from {$route['network']} to {$sa}/{$sn} flags any tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"
pass {$log['pass']} quick on \${$oc['descr']} inet6 from {$route['network']} to {$sa}/{$sn} tracker {$increment_tracker($tracker)} keep state(sloppy) label "pass traffic between statically routed subnets"

EOD;
				}
			}
		}
	}

	update_filter_reload_status(gettext("Creating IPsec rules..."));
	$saved_tracker += 100000;
	$tracker = $saved_tracker;
	$ipfrules .= filter_generate_ipsec_rules($log);

	$ipfrules .= "\nanchor \"tftp-proxy/*\"\n";

	$saved_tracker += 200;
	$tracker = $saved_tracker;
	update_filter_reload_status("Creating uPNP rules...");
	if (is_array($config['installedpackages']['miniupnpd']) && is_array($config['installedpackages']['miniupnpd']['config'][0])) {
		if (isset($config['installedpackages']['miniupnpd']['config'][0]['enable'])) {
			$ipfrules .= "anchor \"miniupnpd\"\n";
		}

		if (is_array($config['installedpackages']['miniupnpd'][0]['config'])) {
			$upnp_interfaces = explode(",", $config['installedpackages']['miniupnpd'][0]['config']['iface_array']);
			foreach ($upnp_interfaces as $upnp_if) {
				if (is_array($FilterIflist[$upnp_if])) {
					$oc = $FilterIflist[$upnp_if];
					unset($sa);
					if ($oc['ip']) {
						$sa = $oc['sa'];
						$sn = $oc['sn'];
					}
					if ($sa) {
						$ipfrules .= <<<EOD
pass in {$log['pass']} on \${$oc['descr']} proto tcp from {$sa}/{$sn} to 239.255.255.250/32 port 1900 tracker {$increment_tracker($tracker)} keep state label "pass multicast traffic to miniupnpd"

EOD;
					}
				}
			}
		}
	}

	return $ipfrules;
}

function filter_rules_spoofcheck_generate($ifname, $ifcfg, $log) {
	global $g, $config, $tracker;
	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_rules_spoofcheck_generate() being called $mt\n";
	}
	$ipfrules = "antispoof {$log['block']} for \${$ifcfg['descr']} tracker {$tracker}\n";
	$tracker++;

	return $ipfrules;
}

/* COMPAT Function */
function tdr_install_cron($should_install) {
	log_error(gettext("Please use filter_tdr_install_cron() function tdr_install_cron will be deprecated!"));
	filter_tdr_install_cron($should_install);
}

/****f* filter/filter_tdr_install_cron
 * NAME
 *   filter_tdr_install_cron
 * INPUTS
 *   $should_install true if the cron entry should be installed, false
 *   if the entry should be removed if it is present
 * RESULT
 *   none
 ******/
function filter_tdr_install_cron($should_install) {
	global $config, $g;

	if (platform_booting() == true) {
		return;
	}

	if (!is_array($config['cron'])) {
		$config['cron'] = array();
	}
	if (!is_array($config['cron']['item'])) {
		$config['cron']['item'] = array();
	}

	$x = 0;
	$is_installed = false;
	foreach ($config['cron']['item'] as $item) {
		if (strstr($item['command'], "filter_configure_sync")) {
			$is_installed = true;
			break;
		}
		$x++;
	}

	switch ($should_install) {
		case true:
			if (!$is_installed) {
				$cron_item = array();
				$cron_item['minute'] = "0,15,30,45";
				$cron_item['hour'] = "*";
				$cron_item['mday'] = "*";
				$cron_item['month'] = "*";
				$cron_item['wday'] = "*";
				$cron_item['who'] = "root";
				$cron_item['command'] = "/etc/rc.filter_configure_sync";
				$config['cron']['item'][] = $cron_item;
				write_config(gettext("Installed 15 minute filter reload for Time Based Rules"));
				configure_cron();
			}
			break;
		case false:
			if ($is_installed) {
				unset($config['cron']['item'][$x]);
				write_config(gettext("Removed 15 minute filter reload for Time Based Rules"));
				configure_cron();
			}
			break;
	}
}

/****f* filter/filter_get_time_based_rule_status
 * NAME
 *   filter_get_time_based_rule_status
 * INPUTS
 *   xml schedule block
 * RESULT
 *   true/false - true if the rule should be installed
 ******/
/*
 <schedules>
   <schedule>
     <name>ScheduleMultipleTime</name>
     <descr>main descr</descr>
     <time>
       <position>0,1,2</position>
       <hour>0:0-24:0</hour>
       <desc>time range 2</desc>
     </time>
     <time>
       <position>4,5,6</position>
       <hour>0:0-24:0</hour>
       <desc>time range 1</desc>
     </time>
   </schedule>
 </schedules>
*/
function filter_get_time_based_rule_status($schedule) {

	/* no schedule? rule should be installed */
	if (empty($schedule)) {
		return true;
	}
	/*
	 * iterate through time blocks and determine
	 * if the rule should be installed or not.
	 */
	foreach ($schedule['timerange'] as $timeday) {
		if (empty($timeday['month'])) {
			$monthstatus = true;
		} else {
			$monthstatus = filter_tdr_month($timeday['month']);
		}
		if (empty($timeday['day'])) {
			$daystatus = true;
		} else {
			$daystatus = filter_tdr_day($timeday['day']);
		}
		if (empty($timeday['hour'])) {
			$hourstatus = true;
		} else {
			$hourstatus = filter_tdr_hour($timeday['hour']);
		}
		if (empty($timeday['position'])) {
			$positionstatus = true;
		} else {
			$positionstatus = filter_tdr_position($timeday['position']);
		}

		if ($monthstatus == true && $daystatus == true && $positionstatus == true && $hourstatus == true) {
			return true;
		}
	}

	return false;
}

function filter_tdr_day($schedule) {
	global $g;

	if ($g['debug']) {
		log_error("[TDR DEBUG] filter_tdr_day($schedule)");
	}

	/*
	 * Calculate day of month.
	 * IE: 29th of may
	 */
	$date = date("d");
	$defined_days = explode(",", $schedule);
	foreach ($defined_days as $dd) {
		if ($date == $dd) {
			return true;
		}
	}
	return false;
}
function filter_tdr_hour($schedule) {
	global $g;

	/* $schedule should be a string such as 16:00-19:00 */
	$tmp = explode("-", $schedule);
	$starting_time = strtotime($tmp[0]);
	$ending_time = strtotime($tmp[1]);
	$now = strtotime("now");
	if ($g['debug']) {
		log_error("[TDR DEBUG] S: $starting_time E: $ending_time N: $now");
	}
	if ($now >= $starting_time and $now < $ending_time) {
		return true;
	}
	return false;
}

function filter_tdr_position($schedule) {
	global $g;

	/*
	 * Calculate position, ie: day of week.
	 * Sunday = 7, Monday = 1, Tuesday = 2
	 * Weds = 3, Thursday = 4, Friday = 5,
	 * Saturday = 6
	 * ...
	 */
	$weekday = date("w");
	if ($g['debug']) {
		log_error("[TDR DEBUG] filter_tdr_position($schedule) $weekday");
	}
	if ($weekday == 0) {
		$weekday = 7;
	}
	$schedule_days = explode(",", $schedule);
	foreach ($schedule_days as $day) {
		if ($day == $weekday) {
			return true;
		}
	}
	return false;
}

function filter_tdr_month($schedule) {
	global $g;

	/*
	 * Calculate month
	 */
	$todays_month = date("n");
	$months = explode(",", $schedule);
	if ($g['debug']) {
		log_error("[TDR DEBUG] filter_tdr_month($schedule)");
	}
	foreach ($months as $month) {
		if ($month == $todays_month) {
			return true;
		}
	}
	return false;
}

function filter_setup_logging_interfaces() {
	global $config, $FilterIflist;

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_setup_logging_interfaces() being called $mt\n";
	}
	$rules = "";
	if (isset($FilterIflist['lan'])) {
		$rules .= "set loginterface {$FilterIflist['lan']['if']}\n";
	} else if (isset($FilterIflist['wan'])) {
		$rules .= "set loginterface {$FilterIflist['wan']['if']}\n";
	}

	return $rules;
}

function filter_process_carp_rules($log) {
	global $g, $config, $tracker;

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_process_carp_rules() being called $mt\n";
	}

	$increment_tracker = 'filter_rule_tracker';
	$lines = "";
	/* return if there are no carp configured items */
	if (!empty($config['hasync']) or !empty($config['virtualip']['vip'])) {
		$lines .= "block in {$log['block']} quick proto carp from (self) to any tracker {$increment_tracker($tracker)}\n";
		$lines .= "pass {$log['pass']} quick proto carp tracker {$increment_tracker($tracker)} no state\n";
	}
	return $lines;
}

/* Generate IPsec Filter Items */
function filter_generate_ipsec_rules($log = array()) {
	global $config, $g, $FilterIflist, $tracker;

	if (isset($config['system']['developerspew'])) {
		$mt = microtime();
		echo "filter_generate_ipsec_rules() being called $mt\n";
	}

	if (isset($config['system']['disablevpnrules'])) {
		return "\n# VPN Rules not added disabled in System->Advanced.\n";
	}

	$increment_tracker = 'filter_rule_tracker';

	$ipfrules = "\n# VPN Rules\n";
	if (!function_exists('ipsec_enabled')) {
		require_once("ipsec.inc");
	}
	if (ipsec_enabled()) {
		/* step through all phase1 entries */
		foreach ($config['ipsec']['phase1'] as $ph1ent) {
			$tracker += 10;

			if (isset ($ph1ent['disabled'])) {
				continue;
			}
			/* determine local and remote peer addresses */
			if (!isset($ph1ent['mobile'])) {
				$rgip = ipsec_get_phase1_dst($ph1ent);
				if (!$rgip) {
					$ipfrules .= "# ERROR! Unable to determine remote IPsec peer address for {$ph1ent['remote-gateway']}\n";
					continue;
				}
			} else {
				$rgip = " any ";
			}
			/* Determine best description */
			if ($ph1ent['descr']) {
				$descr = $ph1ent['descr'];
			} else {
				$descr = $rgip;
			}
			/*
			 * Step through all phase2 entries and determine
			 * which protocols are in use with this peer
			 */
			$prot_used_esp = false;
			$prot_used_ah  = false;
			if (is_array($config['ipsec']['phase2'])) {
				foreach ($config['ipsec']['phase2'] as $ph2ent) {
					/* only evaluate ph2's bound to our ph1 */
					if ($ph2ent['ikeid'] != $ph1ent['ikeid']) {
						continue;
					}
					if ($ph2ent['protocol'] == 'esp') {
						$prot_used_esp = true;
					}
					if ($ph2ent['protocol'] == 'ah') {
						$prot_used_ah = true;
					}
				}
			}

			$a_groups = return_gateway_groups_array();
			if (is_array($a_groups[$ph1ent['interface']])) {
				// bound to gateway group
				$parentinterface = get_failover_interface($ph1ent['interface']);
				if (substr($parentinterface, 0, 4) == "_vip") {
					$parentinterface = get_configured_vip_interface($parentinterface);
					/* IP Alias -> CARP */
					if (substr($parentinterface, 0, 4) == "_vip") {
						$parentinterface = get_configured_vip_interface($parentinterface);
					}
				} else {
					$parentinterface = convert_real_interface_to_friendly_interface_name($parentinterface);
				}
			} elseif (substr($ph1ent['interface'], 0, 4) == "_vip") {
				$parentinterface = get_configured_vip_interface($ph1ent['interface']);
				/* IP Alias -> CARP */
				if (substr($parentinterface, 0, 4) == "_vip") {
					$parentinterface = get_configured_vip_interface($parentinterface);
				}
			} else {
				$parentinterface = $ph1ent['interface'];
			}
			if (empty($FilterIflist[$parentinterface]['descr'])) {
				$ipfrules .= "# Could not locate interface for IPsec: {$descr}\n";
				continue;
			}

			unset($gateway);
			/* add endpoint routes to correct gateway on interface if the
			remote endpoint is not on this interface's subnet  */
			if ((isset($ph1ent['mobile']) || is_ipaddrv4($rgip)) && (interface_has_gateway($parentinterface))) {
				$parentifsubnet = get_interface_ip($parentinterface) . "/" . get_interface_subnet($parentinterface);
				if (isset($ph1ent['mobile']) || !ip_in_subnet($rgip, $parentifsubnet)) {
					$gateway = get_interface_gateway($parentinterface);
					$interface = $FilterIflist[$parentinterface]['if'];

					$route_to = " route-to ( $interface $gateway ) ";
					$reply_to = " reply-to ( $interface $gateway ) ";
				}
			} else if ((isset($ph1ent['mobile']) || is_ipaddrv6($rgip)) && (interface_has_gatewayv6($parentinterface))) {
				$parentifsubnet = get_interface_ipv6($parentinterface) . "/" . get_interface_subnetv6($parentinterface);
				if (isset($ph1ent['mobile']) || !ip_in_subnet($rgip, $parentifsubnet)) {
					$gateway = get_interface_gateway_v6($parentinterface);
					$interface = $FilterIflist[$parentinterface]['if'];

					$route_to = " route-to ( $interface $gateway ) ";
					$reply_to = " reply-to ( $interface $gateway ) ";
				}
			}

			/* Just in case */
			if ((!is_ipaddr($gateway) || empty($interface))) {
				$route_to = " ";
				$reply_to = " ";
			}

			/* Add rules to allow IKE to pass */
			$shorttunneldescr = substr($descr, 0, 35);
			// don't add "pass out" rules where $rgip is any as it will over-match and often break VPN clients behind the system in multi-WAN scenarios. redmine #5819
			if ($rgip != " any ") {
				$ipfrules .= "pass out {$log['pass']} $route_to proto udp from (self) to {$rgip} port = 500 tracker {$increment_tracker($tracker)} keep state label \"IPsec: {$shorttunneldescr} - outbound isakmp\"\n";
			}
			$ipfrules .= <<<EOD
pass in {$log['pass']} on \${$FilterIflist[$parentinterface]['descr']} $reply_to proto udp from {$rgip} to (self) port = 500 tracker {$increment_tracker($tracker)} keep state label "IPsec: {$shorttunneldescr} - inbound isakmp"

EOD;
			/* If NAT-T is enabled, add additional rules */
			if ($ph1ent['nat_traversal'] != "off") {
				if ($rgip != " any ") {
					$ipfrules .= "pass out {$log['pass']} $route_to proto udp from (self) to {$rgip} port = 4500 tracker {$increment_tracker($tracker)} keep state label \"IPsec: {$shorttunneldescr} - outbound nat-t\"\n";
				}
				$ipfrules .= <<<EOD
pass in {$log['pass']} on \${$FilterIflist[$parentinterface]['descr']} $reply_to proto udp from {$rgip} to (self) port = 4500 tracker {$increment_tracker($tracker)} keep state label "IPsec: {$shorttunneldescr} - inbound nat-t"

EOD;
			}
			/* Add rules to allow the protocols in use */
			if ($prot_used_esp) {
				if ($rgip != " any ") {
					$ipfrules .= "pass out {$log['pass']} $route_to proto esp from (self) to {$rgip} tracker {$increment_tracker($tracker)} keep state label \"IPsec: {$shorttunneldescr} - outbound esp proto\"\n";
				}
				$ipfrules .= <<<EOD
pass in {$log['pass']} on \${$FilterIflist[$parentinterface]['descr']} $reply_to proto esp from {$rgip} to (self) tracker {$increment_tracker($tracker)} keep state label "IPsec: {$shorttunneldescr} - inbound esp proto"

EOD;
			}
			if ($prot_used_ah) {
				if ($rgip != " any ") {
					$ipfrules .= "pass out {$log['pass']} $route_to proto ah from (self) to {$rgip} tracker {$increment_tracker($tracker)} keep state label \"IPsec: {$shorttunneldescr} - outbound ah proto\"\n";
				}
				$ipfrules .= <<<EOD
pass in {$log['pass']} on \${$FilterIflist[$parentinterface]['descr']} $reply_to proto ah from {$rgip} to (self) tracker {$increment_tracker($tracker)} keep state label "IPsec: {$shorttunneldescr} - inbound ah proto"

EOD;
			}
		}
	}
	return($ipfrules);
}

function discover_pkg_rules($ruletype) {
	global $config, $g, $aliases;

	/* Bail if there is no pkg directory, or if the package files might be out of sync. */
	if (!is_dir("/usr/local/pkg") || file_exists('/conf/needs_package_sync')) {
		return "";
	}

	$rules = "";
	$files = glob("/usr/local/pkg/*.inc");
	foreach ($files as $pkg_inc) {
		update_filter_reload_status(sprintf(gettext('Checking for %1$s PF hooks in package %2$s'), $ruletype, $pkg_inc));
		$pkg = basename($pkg_inc, ".inc");
		$pkg_generate_rules = "{$pkg}_generate_rules";
		if (!function_exists($pkg_generate_rules)) {
			require_once($pkg_inc);
		}
		if (function_exists($pkg_generate_rules)) {
			update_filter_reload_status(sprintf(gettext('Processing early %1$s rules for package %2$s'), $ruletype, $pkg_inc));
			$tmprules = $pkg_generate_rules("$ruletype");
			file_put_contents("{$g['tmp_path']}/rules.test.packages", $aliases . $tmprules);
			$status = mwexec("/sbin/pfctl -nf {$g['tmp_path']}/rules.test.packages");
			if ($status <> 0) {
				$errorrules = sprintf(gettext("There was an error while parsing the package filter rules for %s."), $pkg_inc) . "\n";
				log_error($errorrules);
				file_put_contents("{$g['tmp_path']}/rules.packages.{$pkg}", "#{$errorrules}\n{$tmprules}\n");
				continue;
			}
			$rules .= $tmprules;
		}
	}
	return $rules;
}

function filter_get_antilockout_ports($wantarray = false) {
	global $config;

	$lockoutports = array();
	$guiport = ($config['system']['webgui']['protocol'] == "https") ? "443" : "80";
	$guiport = empty($config['system']['webgui']['port']) ? $guiport : $config['system']['webgui']['port'];
	$lockoutports[] = $guiport;

	if (($config['system']['webgui']['protocol'] == "https") && !isset($config['system']['webgui']['disablehttpredirect']) && ($guiport != "80")) {
		$lockoutports[] = "80";
	}

	if (isset($config['system']['enablesshd'])) {
		$lockoutports[] = empty($config['system']['ssh']['port']) ? "22" : $config['system']['ssh']['port'];
	}

	if ($wantarray) {
		return $lockoutports;
	} else {
		return implode(" ", $lockoutports);
	}

}

/* get rule index within interface */
function ifridx($if, $ridx) {
	global $config;

	if ($ridx < 0) {
		return $ridx;
	}
	
	$i = $ifridx = 0;
	if (is_array($config['filter']['rule'])) {
		foreach ($config['filter']['rule'] as $rulen => $filterent) {
			if (($filterent['interface'] == $if && !isset($filterent['floating'])) || (isset($filterent['floating']) && "FloatingRules" == $if)) {
				if ($i == $ridx) {
					return $ifridx;
				}
				$ifridx++;
			}
			$i++;
		}
	}
	return $ifridx;
}

/* display rules separators */
function display_separator($separators, $nrules, $columns_in_table) {
	if (is_array($separators)) {
		foreach ($separators as $sepn => $separator) {
			if ($separator['row'][0] == "fr" . $nrules) {
				$cellcolor = $separator['color'];
				print('<tr class="ui-sortable-handle separator">' .
					'<td class="' . $cellcolor . '" colspan="' . ($columns_in_table -1) . '">' . '<span class="' . $cellcolor . '">' . $separator['text'] . '</span></td>' .
					'<td  class="' . $cellcolor . '"><a href="#"><i class="fa fa-trash no-confirm sepdel" title="' . gettext("delete this separator") . '"></i></a></td>' .
					'</tr>' . "\n");
			}
		}
	}
}

/* Return a list of separator rows */
function separator_rows($separators) {
	$seprowns = array();
	if (is_array($separators)) {
		foreach ($separators as $sepn => $separator) {
			$seprows[substr($separator['row']['0'], 2)] = true;
		}
	}
	return $seprows;
}

/* If the separator is located after the place ($ridx) where the rule was added or deleted, move the separator ($mvrows) */
function move_separators(&$a_separators, $ridx, $mvnrows) {
	if (is_array($a_separators)) {
		foreach ($a_separators as $sepi => $separator) {
			$seprow = substr($separator['row']['0'], 2);
			if ($seprow > $ridx) {
				$a_separators[$sepi]['row']['0'] = 'fr' . ($seprow + $mvnrows);
			}
		}
	}
}

?>
