pfSense

<?php

/*

	unbound.inc

	part of pfSense (https://www.pfsense.org)

	Copyright (C) 2015 Warren Baker <warren@percol8.co.za>

	Copyright (c) 2015-2016 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.

*/

/* include all configuration functions */

require_once("config.inc");

require_once("functions.inc");

require_once("filter.inc");

require_once("shaper.inc");

function create_unbound_chroot_path($cfgsubdir = "") {

	global $config, $g;

	// Configure chroot

	if (!is_dir($g['unbound_chroot_path'])) {

		mkdir($g['unbound_chroot_path']);

		chown($g['unbound_chroot_path'], "unbound");

		chgrp($g['unbound_chroot_path'], "unbound");

	}

	if ($cfgsubdir != "") {

		$cfgdir = $g['unbound_chroot_path'] . $cfgsubdir;

		if (!is_dir($cfgdir)) {

			mkdir($cfgdir);

			chown($cfgdir, "unbound");

			chgrp($cfgdir, "unbound");

		}

	}

}

/* Optimize Unbound for environment */

function unbound_optimization() {

	global $config;

	$optimization_settings = array();

	/*

	 * Set the number of threads equal to number of CPUs.

	 * Use 1 to disable threading, if for some reason this sysctl fails.

	 */

	$numprocs = intval(get_single_sysctl('kern.smp.cpus'));

	if ($numprocs > 1) {

		$optimization['number_threads'] = "num-threads: {$numprocs}";

		$optimize_num = pow(2, floor(log($numprocs, 2)));

	} else {

		$optimization['number_threads'] = "num-threads: 1";

		$optimize_num = 4;

	}

	// Slabs to help reduce lock contention.

	$optimization['msg_cache_slabs'] = "msg-cache-slabs: {$optimize_num}";

	$optimization['rrset_cache_slabs'] = "rrset-cache-slabs: {$optimize_num}";

	$optimization['infra_cache_slabs'] = "infra-cache-slabs: {$optimize_num}";

	$optimization['key_cache_slabs'] = "key-cache-slabs: {$optimize_num}";

	/*

	 * Larger socket buffer for busy servers

	 * Check that it is set to 4MB (by default the OS has it configured to 4MB)

	 */

	if (is_array($config['sysctl']) && is_array($config['sysctl']['item'])) {

		foreach ($config['sysctl']['item'] as $tunable) {

			if ($tunable['tunable'] == 'kern.ipc.maxsockbuf') {

				$so = floor(($tunable['value']/1024/1024)-4);

				// Check to ensure that the number is not a negative

				if ($so >= 4) {

					// Limit to 32MB, users might set maxsockbuf very high for other reasons.

					// We do not want unbound to fail because of that.

					$so = min($so, 32);

					$optimization['so_rcvbuf'] = "so-rcvbuf: {$so}m";

				} else {

					unset($optimization['so_rcvbuf']);

				}

			}

		}

	}

	// Safety check in case kern.ipc.maxsockbuf is not available.

	if (!isset($optimization['so_rcvbuf'])) {

		$optimization['so_rcvbuf'] = "#so-rcvbuf: 4m";

	}

	return $optimization;

}

function test_unbound_config($unboundcfg, &$output) {

	global $g;

	$cfgsubdir = "/test";

	unbound_generate_config($unboundcfg, $cfgsubdir);

	unbound_remote_control_setup($cfgsubdir);

	do_as_unbound_user("unbound-anchor", $cfgsubdir);

	$cfgdir = "{$g['unbound_chroot_path']}{$cfgsubdir}";

	$rv = 0;

	exec("/usr/local/sbin/unbound-checkconf {$cfgdir}/unbound.conf 2>&1", $output, $rv);

	rmdir_recursive($cfgdir);

	return $rv;

}

function unbound_generate_config($unboundcfg = NULL, $cfgsubdir = "") {

	global $g;

	$unboundcfgtxt = unbound_generate_config_text($unboundcfg, $cfgsubdir);

	// Configure static Host entries

	unbound_add_host_entries($cfgsubdir);

	// Configure Domain Overrides

	unbound_add_domain_overrides("", $cfgsubdir);

	// Configure Unbound access-lists

	unbound_acls_config($cfgsubdir);

	create_unbound_chroot_path($cfgsubdir);

	file_put_contents("{$g['unbound_chroot_path']}{$cfgsubdir}/unbound.conf", $unboundcfgtxt);

}

function unbound_generate_config_text($unboundcfg = NULL, $cfgsubdir = "") {

	global $config, $g;

	if (is_null($unboundcfg)) {

		$unboundcfg = $config['unbound'];

	}

	// Setup optimization

	$optimization = unbound_optimization();

	// Setup DNSSEC support

	if (isset($unboundcfg['dnssec'])) {

		$module_config = "validator iterator";

		$anchor_file = "auto-trust-anchor-file: {$g['unbound_chroot_path']}{$cfgsubdir}/root.key";

	} else {

		$module_config = "iterator";

	}

	// Setup DNS Rebinding

	if (!isset($config['system']['webgui']['nodnsrebindcheck'])) {

		// Private-addresses for DNS Rebinding

		$private_addr = <<<EOF

# For DNS Rebinding prevention

private-address: 10.0.0.0/8

private-address: 172.16.0.0/12

private-address: 169.254.0.0/16

private-address: 192.168.0.0/16

private-address: fd00::/8

private-address: fe80::/10

EOF;

	}

	// Determine interfaces to run on

	$bindints = "";

	if (!empty($unboundcfg['active_interface'])) {

		$active_interfaces = explode(",", $unboundcfg['active_interface']);

		if (in_array("all", $active_interfaces, true)) {

			$bindints .= "interface: 0.0.0.0\n";

			$bindints .= "interface: ::0\n";

			$bindints .= "interface-automatic: yes\n";

		} else {

			foreach ($active_interfaces as $ubif) {

				if (is_ipaddr($ubif)) {

					$bindints .= "interface: $ubif\n";

				} else {

					$intip = get_interface_ip($ubif);

					if (is_ipaddrv4($intip)) {

						$bindints .= "interface: $intip\n";

					}

					$intip = get_interface_ipv6($ubif);

					if (is_ipaddrv6($intip)) {

						$bindints .= "interface: $intip\n";

					}

				}

			}

		}

	} else {

		$bindints .= "interface: 0.0.0.0\n";

		$bindints .= "interface: ::0\n";

		/* If the active interface array is empty, treat it the same as "All" as is done above. Otherwise it breaks CARP with a default config. */

		$bindints .= "interface-automatic: yes\n";

	}

	// Determine interfaces to run on

	$outgoingints = "";

	if (!empty($unboundcfg['outgoing_interface'])) {

		$outgoingints = "# Outgoing interfaces to be used\n";

		$outgoing_interfaces = explode(",", $unboundcfg['outgoing_interface']);

		foreach ($outgoing_interfaces as $outif) {

			$outip = get_interface_ip($outif);

			if (is_ipaddr($outip)) {

				$outgoingints .= "outgoing-interface: $outip\n";

			}

			$outip = get_interface_ipv6($outif);

			if (is_ipaddrv6($outip)) {

				$outgoingints .= "outgoing-interface: $outip\n";

			}

		}

	}

	// Allow DNS Rebind for forwarded domains

	if (isset($unboundcfg['domainoverrides']) && is_array($unboundcfg['domainoverrides'])) {

		if (!isset($config['system']['webgui']['nodnsrebindcheck'])) {

			$private_domains = "# Set private domains in case authoritative name server returns a Private IP address\n";

			$private_domains .= unbound_add_domain_overrides("private");

		}

		$reverse_zones .= unbound_add_domain_overrides("reverse");

	}

	// Configure Unbound statistics

	$statistics = unbound_statistics();

	// Add custom Unbound options

	if ($unboundcfg['custom_options']) {

		$custom_options_source = explode("\n", base64_decode($unboundcfg['custom_options']));

		$custom_options = "# Unbound custom options\n";

		foreach ($custom_options_source as $ent) {

			$custom_options .= $ent."\n";

		}

	}

	// Server configuration variables

	$port = (is_port($unboundcfg['port'])) ? $unboundcfg['port'] : "53";

	$hide_identity = isset($unboundcfg['hideidentity']) ? "yes" : "no";

	$hide_version = isset($unboundcfg['hideversion']) ? "yes" : "no";

	$harden_dnssec_stripped = isset($unboundcfg['dnssecstripped']) ? "yes" : "no";

	$prefetch = isset($unboundcfg['prefetch']) ? "yes" : "no";

	$prefetch_key = isset($unboundcfg['prefetchkey']) ? "yes" : "no";

	$outgoing_num_tcp = (!empty($unboundcfg['outgoing_num_tcp'])) ? $unboundcfg['outgoing_num_tcp'] : "10";

	$incoming_num_tcp = (!empty($unboundcfg['incoming_num_tcp'])) ? $unboundcfg['incoming_num_tcp'] : "10";

	$edns_buffer_size = (!empty($unboundcfg['edns_buffer_size'])) ? $unboundcfg['edns_buffer_size'] : "4096";

	$num_queries_per_thread = (!empty($unboundcfg['num_queries_per_thread'])) ? $unboundcfg['num_queries_per_thread'] : "4096";

	$jostle_timeout = (!empty($unboundcfg['jostle_timeout'])) ? $unboundcfg['jostle_timeout'] : "200";

	$cache_max_ttl = (!empty($unboundcfg['cache_max_ttl'])) ? $unboundcfg['cache_max_ttl'] : "86400";

	$cache_min_ttl = (!empty($unboundcfg['cache_min_ttl'])) ? $unboundcfg['cache_min_ttl'] : "0";

	$infra_host_ttl = (!empty($unboundcfg['infra_host_ttl'])) ? $unboundcfg['infra_host_ttl'] : "900";

	$infra_cache_numhosts = (!empty($unboundcfg['infra_cache_numhosts'])) ? $unboundcfg['infra_cache_numhosts'] : "10000";

	$unwanted_reply_threshold = (!empty($unboundcfg['unwanted_reply_threshold'])) ? $unboundcfg['unwanted_reply_threshold'] : "0";

	if ($unwanted_reply_threshold == "disabled") {

		$unwanted_reply_threshold = "0";

	}

	$msg_cache_size = (!empty($unboundcfg['msgcachesize'])) ? $unboundcfg['msgcachesize'] : "4";

	$verbosity = isset($unboundcfg['log_verbosity']) ? $unboundcfg['log_verbosity'] : 1;

	$use_caps = isset($unboundcfg['use_caps']) ? "yes" : "no";

	// Set up forwarding if it is configured

	if (isset($unboundcfg['forwarding'])) {

		$dnsservers = array();

		if (isset($config['system']['dnsallowoverride'])) {

			$ns = array_unique(get_nameservers());

			foreach ($ns as $nameserver) {

				if ($nameserver) {

					$dnsservers[] = $nameserver;

				}

			}

		} else {

			$ns = array();

		}

		$sys_dnsservers = array_unique(get_dns_servers());

		foreach ($sys_dnsservers as $sys_dnsserver) {

			if ($sys_dnsserver && (!in_array($sys_dnsserver, $ns))) {

				$dnsservers[] = $sys_dnsserver;

			}

		}

		if (!empty($dnsservers)) {

			$forward_conf .=<<<EOD

# Forwarding

forward-zone:

	name: "."

EOD;

			foreach ($dnsservers as $dnsserver) {

				$forward_conf .= "\tforward-addr: $dnsserver\n";

			}

		}

	} else {

		$forward_conf = "";

	}

	// Size of the RRset cache == 2 * msg-cache-size per Unbound's recommendations

	$rrset_cache_size = $msg_cache_size * 2;

	$unboundconf = <<<EOD

##########################

# Unbound Configuration

##########################

##

# Server configuration

##

server:

{$reverse_zones}

chroot: {$g['unbound_chroot_path']}

username: "unbound"

directory: "{$g['unbound_chroot_path']}"

pidfile: "/var/run/unbound.pid"

use-syslog: yes

port: {$port}

verbosity: {$verbosity}

hide-identity: {$hide_identity}

hide-version: {$hide_version}

harden-glue: yes

do-ip4: yes

do-ip6: yes

do-udp: yes

do-tcp: yes

do-daemonize: yes

module-config: "{$module_config}"

unwanted-reply-threshold: {$unwanted_reply_threshold}

num-queries-per-thread: {$num_queries_per_thread}

jostle-timeout: {$jostle_timeout}

infra-host-ttl: {$infra_host_ttl}

infra-cache-numhosts: {$infra_cache_numhosts}

outgoing-num-tcp: {$outgoing_num_tcp}

incoming-num-tcp: {$incoming_num_tcp}

edns-buffer-size: {$edns_buffer_size}

cache-max-ttl: {$cache_max_ttl}

cache-min-ttl: {$cache_min_ttl}

harden-dnssec-stripped: {$harden_dnssec_stripped}

msg-cache-size: {$msg_cache_size}m

rrset-cache-size: {$rrset_cache_size}m

{$optimization['number_threads']}

{$optimization['msg_cache_slabs']}

{$optimization['rrset_cache_slabs']}

{$optimization['infra_cache_slabs']}

{$optimization['key_cache_slabs']}

outgoing-range: 4096

{$optimization['so_rcvbuf']}

{$anchor_file}

prefetch: {$prefetch}

prefetch-key: {$prefetch_key}

use-caps-for-id: {$use_caps}

# Statistics

{$statistics}

# Interface IP(s) to bind to

{$bindints}

{$outgoingints}

# DNS Rebinding

{$private_addr}

{$private_domains}

# Access lists

include: {$g['unbound_chroot_path']}{$cfgsubdir}/access_lists.conf

# Static host entries

include: {$g['unbound_chroot_path']}{$cfgsubdir}/host_entries.conf

# dhcp lease entries

include: {$g['unbound_chroot_path']}{$cfgsubdir}/dhcpleases_entries.conf

# Domain overrides

include: {$g['unbound_chroot_path']}{$cfgsubdir}/domainoverrides.conf

{$forward_conf}

{$custom_options}

###

# Remote Control Config

###

include: {$g['unbound_chroot_path']}{$cfgsubdir}/remotecontrol.conf

EOD;

	return $unboundconf;

}

function unbound_remote_control_setup($cfgsubdir = "") {

	global $g;

	if (!file_exists("{$g['unbound_chroot_path']}{$cfgsubdir}/remotecontrol.conf") || !file_exists("{$g['unbound_chroot_path']}{$cfgsubdir}/unbound_control.key")) {

		$remotcfg = <<<EOF

remote-control:

	control-enable: yes

	control-interface: 127.0.0.1

	control-port: 953

	server-key-file: "{$g['unbound_chroot_path']}{$cfgsubdir}/unbound_server.key"

	server-cert-file: "{$g['unbound_chroot_path']}{$cfgsubdir}/unbound_server.pem"

	control-key-file: "{$g['unbound_chroot_path']}{$cfgsubdir}/unbound_control.key"

	control-cert-file: "{$g['unbound_chroot_path']}{$cfgsubdir}/unbound_control.pem"

EOF;

		create_unbound_chroot_path($cfgsubdir);

		file_put_contents("{$g['unbound_chroot_path']}{$cfgsubdir}/remotecontrol.conf", $remotcfg);

		// Generate our keys

		do_as_unbound_user("unbound-control-setup", $cfgsubdir);

	}

}

// Read /etc/hosts

function read_hosts() {

	/* Open /etc/hosts and extract the only dhcpleases info

	 * XXX - to convert to an unbound C library which reads /etc/hosts automatically

	 */

	$etc_hosts = array();

	foreach (file('/etc/hosts') as $line) {

		if (strpos($line, "dhcpleases automatically entered")) {

			break;

		}

		$d = preg_split('/\s+/', $line, -1, PREG_SPLIT_NO_EMPTY);

		if (empty($d) || substr(reset($d), 0, 1) == "#") {

			continue;

		}

		$ip = array_shift($d);

		$fqdn = array_shift($d);

		$name = array_shift($d);

		if (!empty($fqdn) && $fqdn != "empty") {

			if (!empty($name) && $name != "empty") {

				array_push($etc_hosts, array(ipaddr => "$ip", fqdn => "$fqdn", name => "$name"));

			} else {

				array_push($etc_hosts, array(ipaddr => "$ip", fqdn => "$fqdn"));

			}

		}

	}

	return $etc_hosts;

}

function sync_unbound_service() {

	global $config, $g;

	create_unbound_chroot_path();

	// Configure our Unbound service

	do_as_unbound_user("unbound-anchor");

	unbound_remote_control_setup();

	unbound_generate_config();

	do_as_unbound_user("start");

	require_once("service-utils.inc");

	if (is_service_running("unbound")) {

		do_as_unbound_user("restore_cache");

	}

}

function unbound_acl_id_used($id) {

	global $config;

	if (is_array($config['unbound']['acls'])) {

		foreach ($config['unbound']['acls'] as & $acls) {

			if ($id == $acls['aclid']) {

				return true;

			}

		}

	}

	return false;

}

function unbound_get_next_id() {

	$aclid = 0;

	while (unbound_acl_id_used($aclid)) {

		$aclid++;

	}

	return $aclid;

}

// Execute commands as the user unbound

function do_as_unbound_user($cmd, $param1 = "") {

	global $g;

	switch ($cmd) {

		case "start":

			mwexec("/usr/local/sbin/unbound -c {$g['unbound_chroot_path']}/unbound.conf");

			break;

		case "stop":

			mwexec("echo '/usr/local/sbin/unbound-control stop' | /usr/bin/su -m unbound", true);

			break;

		case "reload":

			mwexec("echo '/usr/local/sbin/unbound-control reload' | /usr/bin/su -m unbound", true);

			break;

		case "unbound-anchor":

			$root_key_file = "{$g['unbound_chroot_path']}{$param1}/root.key";

			// sanity check root.key because unbound-anchor will fail without manual removal otherwise. redmine #5334

			if (file_exists($root_key_file)) {

				$rootkeycheck = mwexec("/usr/bin/grep 'autotrust trust anchor file' {$root_key_file}", true);

				if ($rootkeycheck != "0") {

					log_error("Unbound {$root_key_file} file is corrupt, removing and recreating.");

					unlink_if_exists($root_key_file);

				}

			}

			mwexec("echo '/usr/local/sbin/unbound-anchor -a {$root_key_file}' | /usr/bin/su -m unbound", true);

			// Only sync the file if this is the real (default) one, not a test one.

			if ($param1 == "") {

				pfSense_fsync($root_key_file);

			}

			break;

		case "unbound-control-setup":

			mwexec("echo '/usr/local/sbin/unbound-control-setup -d {$g['unbound_chroot_path']}{$param1}' | /usr/bin/su -m unbound", true);

			break;

		default:

			break;

	}

}

function unbound_add_domain_overrides($pvt_rev="", $cfgsubdir = "") {

	global $config, $g;

	$domains = $config['unbound']['domainoverrides'];

	$sorted_domains = msort($domains, "domain");

	$result = array();

	foreach ($sorted_domains as $domain) {

		$domain_key = current($domain);

		if (!isset($result[$domain_key])) {

			$result[$domain_key] = array();

		}

		$result[$domain_key][] = $domain['ip'];

	}

	// Domain overrides that have multiple entries need multiple stub-addr: added

	$domain_entries = "";

	foreach ($result as $domain=>$ips) {

		if ($pvt_rev == "private") {

			$domain_entries .= "private-domain: \"$domain\"\n";

			$domain_entries .= "domain-insecure: \"$domain\"\n";

		} else if ($pvt_rev == "reverse") {

			if ((substr($domain, -14) == ".in-addr.arpa.") || (substr($domain, -13) == ".in-addr.arpa")) {

				$domain_entries .= "local-zone: \"$domain\" typetransparent\n";

			}

		} else {

			$domain_entries .= "stub-zone:\n";

			$domain_entries .= "\tname: \"$domain\"\n";

			foreach ($ips as $ip) {

				$domain_entries .= "\tstub-addr: $ip\n";

			}

			$domain_entries .= "\tstub-prime: no\n";

		}

	}

	if ($pvt_rev != "") {

		return $domain_entries;

	} else {

		create_unbound_chroot_path($cfgsubdir);

		file_put_contents("{$g['unbound_chroot_path']}{$cfgsubdir}/domainoverrides.conf", $domain_entries);

	}

}

function unbound_add_host_entries($cfgsubdir = "") {

	global $config, $g;

	// Make sure the config setting is a valid unbound local zone type.  If not use "transparent".

	if (array_key_exists($config['unbound']['system_domain_local_zone_type'], unbound_local_zone_types())) {

		$system_domain_local_zone_type = $config['unbound']['system_domain_local_zone_type'];

	} else {

		$system_domain_local_zone_type = "transparent";

	}

	$unbound_entries = "local-zone: \"{$config['system']['domain']}\" {$system_domain_local_zone_type}\n";

	$hosts = read_hosts();

	$added_ptr = array();

	foreach ($hosts as $host) {

		if (is_ipaddrv4($host['ipaddr'])) {

			$type = 'A';

		} else if (is_ipaddrv6($host['ipaddr'])) {

			$type = 'AAAA';

		} else {

			continue;

		}

		if (!$added_ptr[$host['ipaddr']]) {

			$unbound_entries .= "local-data-ptr: \"{$host['ipaddr']} {$host['fqdn']}\"\n";

			$added_ptr[$host['ipaddr']] = true;

		}

		$unbound_entries .= "local-data: \"{$host['fqdn']} {$type} {$host['ipaddr']}\"\n";

		if (isset($host['name'])) {

			$unbound_entries .= "local-data: \"{$host['name']} {$type} {$host['ipaddr']}\"\n";

		}

	}

	// Write out entries

	create_unbound_chroot_path($cfgsubdir);

	file_put_contents("{$g['unbound_chroot_path']}{$cfgsubdir}/host_entries.conf", $unbound_entries);

	/* dhcpleases will write to this config file, make sure it exists */

	@touch("{$g['unbound_chroot_path']}{$cfgsubdir}/dhcpleases_entries.conf");

}

function unbound_control($action) {

	global $config, $g;

	$cache_dumpfile = "/var/tmp/unbound_cache";

	switch ($action) {

	case "start":

		// Start Unbound

		if ($config['unbound']['enable'] == "on") {

			if (!is_service_running("unbound")) {

				do_as_unbound_user("start");

			}

		}

		break;

	case "stop":

		if ($config['unbound']['enable'] == "on") {

			do_as_unbound_user("stop");

		}

		break;

	case "reload":

		if ($config['unbound']['enable'] == "on") {

			do_as_unbound_user("reload");

		}

		break;

	case "dump_cache":

		// Dump Unbound's Cache

		if ($config['unbound']['dumpcache'] == "on") {

			do_as_unbound_user("dump_cache");

		}

		break;

	case "restore_cache":

		// Restore Unbound's Cache

		if ((is_service_running("unbound")) && ($config['unbound']['dumpcache'] == "on")) {

			if (file_exists($cache_dumpfile) && filesize($cache_dumpfile) > 0) {

				do_as_unbound_user("load_cache < /var/tmp/unbound_cache");

			}

		}

		break;

	default:

		break;

	}

}

// Generation of Unbound statistics

function unbound_statistics() {

	global $config;

	if ($config['stats'] == "on") {

		$stats_interval = $config['unbound']['stats_interval'];

		$cumulative_stats = $config['cumulative_stats'];

		if ($config['extended_stats'] == "on") {

			$extended_stats = "yes";

		} else {

			$extended_stats = "no";

		}

	} else {

		$stats_interval = "0";

		$cumulative_stats = "no";

		$extended_stats = "no";

	}

	/* XXX To do - add RRD graphs */

	$stats = <<<EOF

# Unbound Statistics

statistics-interval: {$stats_interval}

extended-statistics: yes

statistics-cumulative: yes

EOF;

	return $stats;

}

// Unbound Access lists

function unbound_acls_config($cfgsubdir = "") {

	global $g, $config;

	if (!isset($config['unbound']['disable_auto_added_access_control'])) {

		$aclcfg = "access-control: 127.0.0.1/32 allow\n";

		$aclcfg .= "access-control: ::1 allow\n";

		// Add our networks for active interfaces including localhost

		if (!empty($config['unbound']['active_interface'])) {

			$active_interfaces = array_flip(explode(",", $config['unbound']['active_interface']));

			if (in_array("all", $active_interfaces)) {

				$active_interfaces = get_configured_interface_with_descr();

			}

		} else {

			$active_interfaces = get_configured_interface_with_descr();

		}

		$bindints = "";

		foreach ($active_interfaces as $ubif => $ifdesc) {

			$ifip = get_interface_ip($ubif);

			if (is_ipaddrv4($ifip)) {

				// IPv4 is handled via NAT networks below

			}

			$ifip = get_interface_ipv6($ubif);

			if (is_ipaddrv6($ifip)) {

				if (!is_linklocal($ifip)) {

					$subnet_bits = get_interface_subnetv6($ubif);

					$subnet_ip = gen_subnetv6($ifip, $subnet_bits);

					// only add LAN-type interfaces

					if (!interface_has_gateway($ubif)) {

						$aclcfg .= "access-control: {$subnet_ip}/{$subnet_bits} allow\n";

					}

				}

				// add for IPv6 static routes to local networks

				// for safety, we include only routes reachable on an interface with no

				// gateway specified - read: not an Internet connection.

				$static_routes = get_staticroutes();

				foreach ($static_routes as $route) {

					if ((lookup_gateway_interface_by_name($route['gateway']) == $ubif) && !interface_has_gateway($ubif)) {

						// route is on this interface, interface doesn't have gateway, add it

						$aclcfg .= "access-control: {$route['network']} allow\n";

					}

				}

			}

		}

		// Generate IPv4 access-control entries using the same logic as automatic outbound NAT

		if (empty($FilterIflist)) {

			filter_generate_optcfg_array();

		}

		$natnetworks_array = array();

		$natnetworks_array = filter_nat_rules_automatic_tonathosts();

		foreach ($natnetworks_array as $allowednet) {

			$aclcfg .= "access-control: $allowednet allow \n";

		}

	}

	// Configure the custom ACLs

	if (is_array($config['unbound']['acls'])) {

		foreach ($config['unbound']['acls'] as $unbound_acl) {

			$aclcfg .= "#{$unbound_acl['aclname']}\n";

			foreach ($unbound_acl['row'] as $network) {

				if ($unbound_acl['aclaction'] == "allow snoop") {

					$unbound_acl['aclaction'] = "allow_snoop";

				}

				$aclcfg .= "access-control: {$network['acl_network']}/{$network['mask']} {$unbound_acl['aclaction']}\n";

			}

		}

	}

	// Write out Access list

	create_unbound_chroot_path($cfgsubdir);

	file_put_contents("{$g['unbound_chroot_path']}{$cfgsubdir}/access_lists.conf", $aclcfg);

}

// Generate hosts and reload services

function unbound_hosts_generate() {

	// Generate our hosts file

	unbound_add_host_entries();

	// Reload our service to read the updates

	unbound_control("reload");

}

// Array of valid unbound local zone types

function unbound_local_zone_types() {

	return array(

		"deny" => gettext("Deny"),

		"refuse" => gettext("Refuse"),

		"static" => gettext("Static"),

		"transparent" => gettext("Transparent"),

		"typetransparent" => gettext("Type Transparent"),

		"redirect" => gettext("Redirect"),

		"inform" => gettext("Inform"),

		"inform_deny" => gettext("Inform Deny"),

		"nodefault" => gettext("No Default")

	);

}

?>