pfSense

<?php

/*

	services_dhcpv6.php

*/

/* ====================================================================

 *	Copyright (c)  2004-2015  Electric Sheep Fencing, LLC. All rights reserved.

 *	Copyright (c)  2010 Seth Mos <seth.mos@dds.nl>

 *

 *	Some or all of this file is based on the m0n0wall project which is

 *	Copyright (c)  2004 Manuel Kasper (BSD 2 clause)

 *

 *	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.

 *

 *	====================================================================

 *

 */

##|+PRIV

##|*IDENT=page-services-dhcpv6server

##|*NAME=Services: DHCPv6 server

##|*DESCR=Allow access to the 'Services: DHCPv6 server' page.

##|*MATCH=services_dhcpv6.php*

##|-PRIV

require("guiconfig.inc");

require_once("filter.inc");

if (!$g['services_dhcp_server_enable']) {

	header("Location: /");

	exit;

}

/*	Fix failover DHCP problem

 *	http://article.gmane.org/gmane.comp.security.firewalls.pfsense.support/18749

 */

ini_set("memory_limit", "64M");

$if = $_GET['if'];

if ($_POST['if']) {

	$if = $_POST['if'];

}

/* if OLSRD is enabled, allow WAN to house DHCP. */

if ($config['installedpackages']['olsrd']) {

	foreach ($config['installedpackages']['olsrd']['config'] as $olsrd) {

		if ($olsrd['enable']) {

			$is_olsr_enabled = true;

			break;

		}

	}

}

$iflist = get_configured_interface_with_descr();

$iflist = array_merge($iflist, get_configured_pppoe_server_interfaces());

/* set the starting interface */

if (!$if || !isset($iflist[$if])) {

	foreach ($iflist as $ifent => $ifname) {

		$oc = $config['interfaces'][$ifent];

		if ((is_array($config['dhcpdv6'][$ifent]) && !isset($config['dhcpdv6'][$ifent]['enable']) && !(is_ipaddrv6($oc['ipaddrv6']) && (!is_linklocal($oc['ipaddrv6'])))) ||

		    (!is_array($config['dhcpdv6'][$ifent]) && !(is_ipaddrv6($oc['ipaddrv6']) && (!is_linklocal($oc['ipaddrv6']))))) {

			continue;

		}

		$if = $ifent;

		break;

	}

}

if (is_array($config['dhcpdv6'][$if])) {

	/* DHCPv6 */

	if (is_array($config['dhcpdv6'][$if]['range'])) {

		$pconfig['range_from'] = $config['dhcpdv6'][$if]['range']['from'];

		$pconfig['range_to'] = $config['dhcpdv6'][$if]['range']['to'];

	}

	if (is_array($config['dhcpdv6'][$if]['prefixrange'])) {

		$pconfig['prefixrange_from'] = $config['dhcpdv6'][$if]['prefixrange']['from'];

		$pconfig['prefixrange_to'] = $config['dhcpdv6'][$if]['prefixrange']['to'];

		$pconfig['prefixrange_length'] = $config['dhcpdv6'][$if]['prefixrange']['prefixlength'];

	}

	$pconfig['deftime'] = $config['dhcpdv6'][$if]['defaultleasetime'];

	$pconfig['maxtime'] = $config['dhcpdv6'][$if]['maxleasetime'];

	$pconfig['domain'] = $config['dhcpdv6'][$if]['domain'];

	$pconfig['domainsearchlist'] = $config['dhcpdv6'][$if]['domainsearchlist'];

	list($pconfig['wins1'], $pconfig['wins2']) = $config['dhcpdv6'][$if]['winsserver'];

	list($pconfig['dns1'], $pconfig['dns2'], $pconfig['dns3'], $pconfig['dns4']) = $config['dhcpdv6'][$if]['dnsserver'];

	$pconfig['enable'] = isset($config['dhcpdv6'][$if]['enable']);

	$pconfig['ddnsdomain'] = $config['dhcpdv6'][$if]['ddnsdomain'];

	$pconfig['ddnsdomainprimary'] = $config['dhcpdv6'][$if]['ddnsdomainprimary'];

	$pconfig['ddnsdomainkeyname'] = $config['dhcpdv6'][$if]['ddnsdomainkeyname'];

	$pconfig['ddnsdomainkey'] = $config['dhcpdv6'][$if]['ddnsdomainkey'];

	$pconfig['ddnsupdate'] = isset($config['dhcpdv6'][$if]['ddnsupdate']);

	list($pconfig['ntp1'], $pconfig['ntp2']) = $config['dhcpdv6'][$if]['ntpserver'];

	$pconfig['tftp'] = $config['dhcpdv6'][$if]['tftp'];

	$pconfig['ldap'] = $config['dhcpdv6'][$if]['ldap'];

	$pconfig['netboot'] = isset($config['dhcpdv6'][$if]['netboot']);

	$pconfig['bootfile_url'] = $config['dhcpdv6'][$if]['bootfile_url'];

	$pconfig['netmask'] = $config['dhcpdv6'][$if]['netmask'];

	$pconfig['numberoptions'] = $config['dhcpdv6'][$if]['numberoptions'];

	$pconfig['dhcpv6leaseinlocaltime'] = $config['dhcpdv6'][$if]['dhcpv6leaseinlocaltime'];

	if (!is_array($config['dhcpdv6'][$if]['staticmap'])) {

		$config['dhcpdv6'][$if]['staticmap'] = array();

	}

	$a_maps = &$config['dhcpdv6'][$if]['staticmap'];

}

$ifcfgip = get_interface_ipv6($if);

$ifcfgsn = get_interface_subnetv6($if);

/*	 set the enabled flag which will tell us if DHCP relay is enabled

 *	 on any interface. We will use this to disable DHCP server since

 *	 the two are not compatible with each other.

 */

$dhcrelay_enabled = false;

$dhcrelaycfg = $config['dhcrelay6'];

if (is_array($dhcrelaycfg)) {

	foreach ($dhcrelaycfg as $dhcrelayif => $dhcrelayifconf) {

		if (isset($dhcrelayifconf['enable']) && isset($iflist[$dhcrelayif]) &&

		    (!link_interface_to_bridge($dhcrelayif))) {

			$dhcrelay_enabled = true;

		}

	}

}

if ($_POST) {

	unset($input_errors);

	$old_dhcpdv6_enable = ($pconfig['enable'] == true);

	$new_dhcpdv6_enable = ($_POST['enable'] ? true : false);

	$dhcpdv6_enable_changed = ($old_dhcpdv6_enable != $new_dhcpdv6_enable);

	$pconfig = $_POST;

	$numberoptions = array();

	for ($x = 0; $x < 99; $x++) {

		if (isset($_POST["number{$x}"]) && ctype_digit($_POST["number{$x}"])) {

			$numbervalue = array();

			$numbervalue['number'] = htmlspecialchars($_POST["number{$x}"]);

			$numbervalue['value'] = base64_encode($_POST["value{$x}"]);

			$numberoptions['item'][] = $numbervalue;

		}

	}

	// Reload the new pconfig variable that the forum uses.

	$pconfig['numberoptions'] = $numberoptions;

	/* input validation */

	if ($_POST['enable']) {

		$reqdfields = explode(" ", "range_from range_to");

		$reqdfieldsn = array(gettext("Range begin"), gettext("Range end"));

		do_input_validation($_POST, $reqdfields, $reqdfieldsn, $input_errors);

		if (($_POST['prefixrange_from'] && !is_ipaddrv6($_POST['prefixrange_from']))) {

			$input_errors[] = gettext("A valid prefix range must be specified.");

		}

		if (($_POST['prefixrange_to'] && !is_ipaddrv6($_POST['prefixrange_to']))) {

			$input_errors[] = gettext("A valid prefix range must be specified.");

		}

		if (($_POST['range_from'] && !is_ipaddrv6($_POST['range_from']))) {

			$input_errors[] = gettext("A valid range must be specified.");

		}

		if (($_POST['range_to'] && !is_ipaddrv6($_POST['range_to']))) {

			$input_errors[] = gettext("A valid range must be specified.");

		}

		if (($_POST['gateway'] && !is_ipaddrv6($_POST['gateway']))) {

			$input_errors[] = gettext("A valid IPv6 address must be specified for the gateway.");

		}

		if (($_POST['dns1'] && !is_ipaddrv6($_POST['dns1'])) ||

		    ($_POST['dns2'] && !is_ipaddrv6($_POST['dns2'])) ||

		    ($_POST['dns3'] && !is_ipaddrv6($_POST['dns3'])) ||

		    ($_POST['dns4'] && !is_ipaddrv6($_POST['dns4']))) {

			$input_errors[] = gettext("A valid IPv6 address must be specified for each of the DNS servers.");

		}

		if ($_POST['deftime'] && (!is_numeric($_POST['deftime']) || ($_POST['deftime'] < 60))) {

			$input_errors[] = gettext("The default lease time must be at least 60 seconds.");

		}

		if ($_POST['maxtime'] && (!is_numeric($_POST['maxtime']) || ($_POST['maxtime'] < 60) || ($_POST['maxtime'] <= $_POST['deftime']))) {

			$input_errors[] = gettext("The maximum lease time must be at least 60 seconds and higher than the default lease time.");

		}

		if (($_POST['ddnsdomain'] && !is_domain($_POST['ddnsdomain']))) {

			$input_errors[] = gettext("A valid domain name must be specified for the dynamic DNS registration.");

		}

		if (($_POST['ddnsdomain'] && !is_ipaddrv4($_POST['ddnsdomainprimary']))) {

			$input_errors[] = gettext("A valid primary domain name server IPv4 address must be specified for the dynamic domain name.");

		}

		if (($_POST['ddnsdomainkey'] && !$_POST['ddnsdomainkeyname']) ||

		    ($_POST['ddnsdomainkeyname'] && !$_POST['ddnsdomainkey'])) {

			$input_errors[] = gettext("You must specify both a valid domain key and key name.");

		}

		if ($_POST['domainsearchlist']) {

			$domain_array=preg_split("/[ ;]+/", $_POST['domainsearchlist']);

			foreach ($domain_array as $curdomain) {

				if (!is_domain($curdomain)) {

					$input_errors[] = gettext("A valid domain search list must be specified.");

					break;

				}

			}

		}

		if (($_POST['ntp1'] && !is_ipaddrv6($_POST['ntp1'])) || ($_POST['ntp2'] && !is_ipaddrv6($_POST['ntp2']))) {

			$input_errors[] = gettext("A valid IPv6 address must be specified for the primary/secondary NTP servers.");

		}

		if (($_POST['domain'] && !is_domain($_POST['domain']))) {

			$input_errors[] = gettext("A valid domain name must be specified for the DNS domain.");

		}

		if ($_POST['tftp'] && !is_ipaddr($_POST['tftp']) && !is_domain($_POST['tftp']) && !is_URL($_POST['tftp'])) {

			$input_errors[] = gettext("A valid IPv6 address or hostname must be specified for the TFTP server.");

		}

		if (($_POST['bootfile_url'] && !is_URL($_POST['bootfile_url']))) {

			$input_errors[] = gettext("A valid URL must be specified for the network bootfile.");

		}

		// Disallow a range that includes the virtualip

		if (is_array($config['virtualip']['vip'])) {

			foreach ($config['virtualip']['vip'] as $vip) {

				if ($vip['interface'] == $if) {

					if ($vip['subnetv6'] && is_inrange_v6($vip['subnetv6'], $_POST['range_from'], $_POST['range_to'])) {

						$input_errors[] = sprintf(gettext("The subnet range cannot overlap with virtual IPv6 address %s."), $vip['subnetv6']);

					}

				}

			}

		}

		$noip = false;

		if (is_array($a_maps)) {

			foreach ($a_maps as $map) {

				if (empty($map['ipaddrv6'])) {

					$noip = true;

				}

			}

		}

		if (!$input_errors) {

			/* make sure the range lies within the current subnet */

			$subnet_start = gen_subnetv6($ifcfgip, $ifcfgsn);

			$subnet_end = gen_subnetv6_max($ifcfgip, $ifcfgsn);

			if (is_ipaddrv6($ifcfgip)) {

				if ((!is_inrange_v6($_POST['range_from'], $subnet_start, $subnet_end)) ||

				    (!is_inrange_v6($_POST['range_to'], $subnet_start, $subnet_end))) {

					$input_errors[] = gettext("The specified range lies outside of the current subnet.");

				}

			}

			/* "from" cannot be higher than "to" */

			if (inet_pton($_POST['range_from']) > inet_pton($_POST['range_to'])) {

				$input_errors[] = gettext("The range is invalid (first element higher than second element).");

			}

			/* make sure that the DHCP Relay isn't enabled on this interface */

			if (isset($config['dhcrelay'][$if]['enable'])) {

				$input_errors[] = sprintf(gettext("You must disable the DHCP relay on the %s interface before enabling the DHCP server."), $iflist[$if]);

			}

			/* Verify static mappings do not overlap:

			   - available DHCP range

			   - prefix delegation range (FIXME: still need to be completed) */

			$dynsubnet_start = inet_pton($_POST['range_from']);

			$dynsubnet_end = inet_pton($_POST['range_to']);

			if (is_array($a_maps)) {

				foreach ($a_maps as $map) {

					if (empty($map['ipaddrv6'])) {

						continue;

					}

					if ((inet_pton($map['ipaddrv6']) > $dynsubnet_start) &&

					    (inet_pton($map['ipaddrv6']) < $dynsubnet_end)) {

						$input_errors[] = sprintf(gettext("The DHCP range cannot overlap any static DHCP mappings."));

						break;

					}

				}

			}

		}

	}

	if (!$input_errors) {

		if (!is_array($config['dhcpdv6'][$if])) {

			$config['dhcpdv6'][$if] = array();

		}

		if (!is_array($config['dhcpdv6'][$if]['range'])) {

			$config['dhcpdv6'][$if]['range'] = array();

		}

		if (!is_array($config['dhcpdv6'][$if]['prefixrange'])) {

			$config['dhcpdv6'][$if]['prefixrange'] = array();

		}

		$config['dhcpdv6'][$if]['range']['from'] = $_POST['range_from'];

		$config['dhcpdv6'][$if]['range']['to'] = $_POST['range_to'];

		$config['dhcpdv6'][$if]['prefixrange']['from'] = $_POST['prefixrange_from'];

		$config['dhcpdv6'][$if]['prefixrange']['to'] = $_POST['prefixrange_to'];

		$config['dhcpdv6'][$if]['prefixrange']['prefixlength'] = $_POST['prefixrange_length'];

		$config['dhcpdv6'][$if]['defaultleasetime'] = $_POST['deftime'];

		$config['dhcpdv6'][$if]['maxleasetime'] = $_POST['maxtime'];

		$config['dhcpdv6'][$if]['netmask'] = $_POST['netmask'];

		unset($config['dhcpdv6'][$if]['winsserver']);

		unset($config['dhcpdv6'][$if]['dnsserver']);

		if ($_POST['dns1']) {

			$config['dhcpdv6'][$if]['dnsserver'][] = $_POST['dns1'];

		}

		if ($_POST['dns2']) {

			$config['dhcpdv6'][$if]['dnsserver'][] = $_POST['dns2'];

		}

		if ($_POST['dns3']) {

			$config['dhcpdv6'][$if]['dnsserver'][] = $_POST['dns3'];

		}

		if ($_POST['dns4']) {

			$config['dhcpdv6'][$if]['dnsserver'][] = $_POST['dns4'];

		}

		$config['dhcpdv6'][$if]['domain'] = $_POST['domain'];

		$config['dhcpdv6'][$if]['domainsearchlist'] = $_POST['domainsearchlist'];

		$config['dhcpdv6'][$if]['enable'] = ($_POST['enable']) ? true : false;

		$config['dhcpdv6'][$if]['ddnsdomain'] = $_POST['ddnsdomain'];

		$config['dhcpdv6'][$if]['ddnsdomainprimary'] = $_POST['ddnsdomainprimary'];

		$config['dhcpdv6'][$if]['ddnsdomainkeyname'] = $_POST['ddnsdomainkeyname'];

		$config['dhcpdv6'][$if]['ddnsdomainkey'] = $_POST['ddnsdomainkey'];

		$config['dhcpdv6'][$if]['ddnsupdate'] = ($_POST['ddnsupdate']) ? true : false;

		unset($config['dhcpdv6'][$if]['ntpserver']);

		if ($_POST['ntp1']) {

			$config['dhcpdv6'][$if]['ntpserver'][] = $_POST['ntp1'];

		}

		if ($_POST['ntp2']) {

			$config['dhcpdv6'][$if]['ntpserver'][] = $_POST['ntp2'];

		}

		$config['dhcpdv6'][$if]['tftp'] = $_POST['tftp'];

		$config['dhcpdv6'][$if]['ldap'] = $_POST['ldap'];

		$config['dhcpdv6'][$if]['netboot'] = ($_POST['netboot']) ? true : false;

		$config['dhcpdv6'][$if]['bootfile_url'] = $_POST['bootfile_url'];

		$config['dhcpdv6'][$if]['dhcpv6leaseinlocaltime'] = $_POST['dhcpv6leaseinlocaltime'];

		// Handle the custom options rowhelper

		if (isset($config['dhcpdv6'][$if]['numberoptions']['item'])) {

			unset($config['dhcpdv6'][$if]['numberoptions']['item']);

		}

		$config['dhcpdv6'][$if]['numberoptions'] = $numberoptions;

		write_config();

		$retval = 0;

		$retvaldhcp = 0;

		$retvaldns = 0;

		/* Stop DHCPv6 so we can cleanup leases */

		killbypid("{$g['dhcpd_chroot_path']}{$g['varrun_path']}/dhcpdv6.pid");

		// dhcp_clean_leases();

		/* dnsmasq_configure calls dhcpd_configure */

		/* no need to restart dhcpd twice */

		if (isset($config['dnsmasq']['enable']) && isset($config['dnsmasq']['regdhcpstatic']))	{

			$retvaldns = services_dnsmasq_configure();

			if ($retvaldns == 0) {

				clear_subsystem_dirty('hosts');

				clear_subsystem_dirty('staticmaps');

			}

		} else if (isset($config['unbound']['enable']) && isset($config['unbound']['regdhcpstatic'])) {

			$retvaldns = services_unbound_configure();

			if ($retvaldns == 0) {

				clear_subsystem_dirty('unbound');

				clear_subsystem_dirty('staticmaps');

			}

		} else {

			$retvaldhcp = services_dhcpd_configure();

			if ($retvaldhcp == 0) {

				clear_subsystem_dirty('staticmaps');

			}

		}

		if ($dhcpdv6_enable_changed) {

			$retvalfc = filter_configure();

		}

		if ($retvaldhcp == 1 || $retvaldns == 1 || $retvalfc == 1) {

			$retval = 1;

		}

		$savemsg = get_std_save_message($retval);

	}

}

if ($_GET['act'] == "del") {

	if ($a_maps[$_GET['id']]) {

		unset($a_maps[$_GET['id']]);

		write_config();

		if (isset($config['dhcpdv6'][$if]['enable'])) {

			mark_subsystem_dirty('staticmapsv6');

			if (isset($config['dnsmasq']['enable']) && isset($config['dnsmasq']['regdhcpstaticv6'])) {

				mark_subsystem_dirty('hosts');

			}

		}

		header("Location: services_dhcpv6.php?if={$if}");

		exit;

	}

}

$pgtitle = array(gettext("Services"), gettext("DHCPv6 Server"));

$shortcut_section = "dhcp6";

include("head.inc");

if ($input_errors) {

	print_input_errors($input_errors);

}

if ($savemsg) {

	print_info_box($savemsg, 'success');

}

if ($dhcrelay_enabled) {

	print_info_box(gettext("DHCP Relay is currently enabled. Cannot enable the DHCP Server service while the DHCP Relay is enabled on any interface."), 'danger');

	include("foot.inc");

	exit;

}

if (is_subsystem_dirty('staticmaps')) {

	print_apply_box(gettext('The static mapping configuration has been changed.') . '<br />' . gettext('You must apply the changes in order for them to take effect.'));

}

/* active tabs */

$tab_array = array();

$tabscounter = 0;

$i = 0;

foreach ($iflist as $ifent => $ifname) {

	$oc = $config['interfaces'][$ifent];

	if ((is_array($config['dhcpdv6'][$ifent]) && !isset($config['dhcpdv6'][$ifent]['enable']) && !(is_ipaddrv6($oc['ipaddrv6']) && (!is_linklocal($oc['ipaddrv6'])))) ||

	    (!is_array($config['dhcpdv6'][$ifent]) && !(is_ipaddrv6($oc['ipaddrv6']) && (!is_linklocal($oc['ipaddrv6']))))) {

		continue;

	}

	if ($ifent == $if) {

		$active = true;

	} else {

		$active = false;

	}

	$tab_array[] = array($ifname, $active, "services_dhcpv6.php?if={$ifent}");

	$tabscounter++;

}

/* tack on PPPoE or PPtP servers here */

/* pppoe server */

if (is_array($config['pppoes']['pppoe'])) {

	foreach ($config['pppoes']['pppoe'] as $pppoe) {

		if ($pppoe['mode'] == "server") {

			$ifent = "poes". $pppoe['pppoeid'];

			$ifname = strtoupper($ifent);

			if ($ifent == $if) {

				$active = true;

			} else {

				$active = false;

			}

			$tab_array[] = array($ifname, $active, "services_dhcpv6.php?if={$ifent}");

			$tabscounter++;

		}

	}

}

if ($tabscounter == 0) {

	print_info_box(gettext("The DHCPv6 Server can only be enabled on interfaces configured with a static IPv6 address. This system has none."), 'danger');

	include("foot.inc");

	exit;

}

display_top_tabs($tab_array);

$tab_array = array();

$tab_array[] = array(gettext("DHCPv6 Server"),		 true,	"services_dhcpv6.php?if={$if}");

$tab_array[] = array(gettext("Router Advertisements"), false, "services_router_advertisements.php?if={$if}");

display_top_tabs($tab_array, false, 'nav nav-tabs');

$form = new Form(new Form_Button(

	'Submit',

	'Save'

));

$section = new Form_Section('DHCPv6 Options');

$section->addInput(new Form_Checkbox(

	'enable',

	'DHCPv6 Server',

	'Enable DHCPv6 server on interface ' . $iflist[$if],

	$pconfig['enable']

))->toggles('.form-group:not(:first-child)');

if (is_ipaddrv6($ifcfgip)) {

	$section->addInput(new Form_StaticText(

		'Subnet',

		gen_subnetv6($ifcfgip, $ifcfgsn)

		));

	$section->addInput(new Form_StaticText(

		'Subnet Mask',

		$ifcfgsn . ' bits'

		));

	$section->addInput(new Form_StaticText(

		'Available Range',

		$range_from = gen_subnetv6($ifcfgip, $ifcfgsn) . ' to ' . gen_subnetv6_max($ifcfgip, $ifcfgsn)

		));

}

if ($is_olsr_enabled) {

	$section->addInput(new Form_Select(

	'netmask',

	'Subnet Mask',

	$pconfig['netmask'],

	array_combine(range(128, 1, -1), range(128, 1, -1))

	));

}

$f1 = new Form_Input(

	'range_from',

	null,

	'text',

	$pconfig['range_from']

);

$f1->setHelp('To');

$f2 = new Form_Input(

	'range_to',

	null,

	'text',

	$pconfig['range_to']

);

$f2->setHelp('From');

$group = new Form_Group('Range');

$group->add($f1);

$group->add($f2);

$section->add($group);

$f1 = new Form_Input(

	'prefixrange_from',

	null,

	'text',

	$pconfig['prefixrange_from']

);

$f1->setHelp('To');

$f2 = new Form_Input(

	'prefixrange_to',

	null,

	'text',

	$pconfig['prefixrange_to']

);

$f2->setHelp('From');

$group = new Form_Group('Prefix Delegation Range');

$group->add($f1);

$group->add($f2);

$section->add($group);

$section->addInput(new Form_Select(

	'prefixrange_length',

	'Prefix Delegation Size',

	$pconfig['prefixrange_length'],

	array(

		'48' => '48',

		'52' => '52',

		'56' => '56',

		'60' => '60',

		'62' => '62',

		'63' => '63',

		'64' => '64'

		)

))->setHelp('You can define a Prefix range here for DHCP Prefix Delegation. This allows for assigning networks to subrouters. The start and end of the range must end on boundaries of the prefix delegation size.');

$group = new Form_Group('DNS Servers');

for ($i=1;$i<=4; $i++) {

	$group->add(new Form_input(

		'dns' . $i,

		null,

		'text',

		$pconfig['dns' . $i],

		['placeholder' => 'DNS ' . $i]

	));

}

$group->setHelp('Leave blank to use the system default DNS servers, this interface\'s IP if DNS forwarder is enabled, or the servers configured on the "General" page.');

$section->add($group);

$section->addInput(new Form_Input(

	'domain',

	'Domain Name',

	'text',

	$pconfig['domain']

))->setHelp('The default is to use the domain name of this system as the default domain name provided by DHCP. You may specify an alternate domain name here. ');

$section->addInput(new Form_Input(

	'domainsearchlist',

	'Domain search list',

	'text',

	$pconfig['domainsearchlist']

))->setHelp('The DHCP server can optionally provide a domain search list. Use the semicolon character as separator');

$section->addInput(new Form_Input(

	'deftime',

	'Default lease time',

	'text',

	$pconfig['deftime']

))->setHelp('Seconds . Used for clients that do not ask for a specific expiration time. ' . ' <br />' .

			'The default is 7200 seconds.');

$section->addInput(new Form_Input(

	'maxtime',

	'Max lease time',

	'text',

	$pconfig['maxtime']

))->setHelp('Maximum lease time for clients that ask for a specific expiration time.' . ' <br />' .

			'The default is 86400 seconds.');

$section->addInput(new Form_Checkbox(

	'dhcpv6leaseinlocaltime',

	'Time Format Change',

	'Change DHCPv6 display lease time from UTC to local time',

	$pconfig['dhcpv6leaseinlocaltime']

))->setHelp('By default DHCPv6 leases are displayed in UTC time. ' .

			'By checking this box DHCPv6 lease time will be displayed in local time and set to time zone selected. ' .

			'This will be used for all DHCPv6 interfaces lease time.');

$btndyndns = new Form_Button(

	'btndyndns',

	'Advanced'

);

$btndyndns->removeClass('btn-primary')->addClass('btn-default btn-sm');

$section->addInput(new Form_StaticText(

	'Dynamic DNS',

	$btndyndns . ' ' . 'Show dynamic DNS settings'

));

$section->addInput(new Form_Checkbox(

	'ddnsupdate',

	'DHCP Registration',

	'Enable registration of DHCP client names in DNS.',

	$pconfig['ddnsupdate']

));

$section->addInput(new Form_Input(

	'ddnsdomain',

	'DDNS Domain',

	'text',

	$pconfig['ddnsdomain']

))->setHelp('Leave blank to disable dynamic DNS registration. Enter the dynamic DNS domain which will be used to register client names in the DNS server.');

$section->addInput(new Form_IpAddress(

	'ddnsdomainprimary',

	'DDNS Server IP',

	$pconfig['ddnsdomainprimary']

))->setHelp('Enter the primary domain name server IP address for the dynamic domain name.');

$section->addInput(new Form_Input(

	'ddnsdomainkeyname',

	'DDNS Domain Key name',

	'text',

	$pconfig['ddnsdomainkeyname']

))->setHelp('Enter the dynamic DNS domain key name which will be used to register client names in the DNS server.');

$section->addInput(new Form_Input(

	'ddnsdomainkey',

	'DDNS Domain Key secret',

	'text',

	$pconfig['ddnsdomainkey']

))->setHelp('Enter the dynamic DNS domain key secret which will be used to register client names in the DNS server.');

$btnntp = new Form_Button(

	'btnntp',

	'Advanced'

);

$btnntp->removeClass('btn-primary')->addClass('btn-default btn-sm');

$section->addInput(new Form_StaticText(

	'NTP servers',

	$btnntp . ' ' . 'Show NTP Configuration'

));

$group = new Form_Group('NTP Servers');

$group->add(new Form_Input(

	'ntp1',

	'NTP Server 1',

	'text',

	$pconfig['ntp1'],

	['placeholder' => 'NTP 1']

));

$group->add(new Form_Input(

	'ntp2',

	'NTP Server 2',

	'text',

	$pconfig['ntp2'],

	['placeholder' => 'NTP 2']

));

$group->addClass('ntpclass');

$section->add($group);

$btnldap = new Form_Button(

	'btnldap',

	'Advanced'

);

$btnldap->removeClass('btn-primary')->addClass('btn-default btn-sm');

$section->addInput(new Form_StaticText(

	'LDAP',

	$btnldap . ' ' . 'Show LDAP Configuration'

));

$section->addInput(new Form_Input(

	'ldap',

	'LDAP URI',

	'text',

	$pconfig['ldap']

));

$btnnetboot = new Form_Button(

	'btnnetboot',

	'Advanced'

);

$btnnetboot->removeClass('btn-primary')->addClass('btn-default btn-sm');

$section->addInput(new Form_StaticText(

	'Network booting',

	$btnnetboot . ' ' . 'Show Network booting'

));