pfSense

<?php

/* $Id$ */

/*

	services_dhcpv6.php

	parts of m0n0wall (http://m0n0.ch/wall)

	Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.

	All rights reserved.

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

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

        Copyright (C) 2013-2014 Electric Sheep Fencing, LP

	All rights reserved.

	Redistribution and use in source and binary forms, with or without

	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,

	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright

	   notice, this list of conditions and the following disclaimer in the

	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,

	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,

	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

	POSSIBILITY OF SUCH DAMAGE.

*/

/*

	pfSense_BUILDER_BINARIES:	/bin/rm

	pfSense_MODULE:	interfaces

*/

##|+PRIV

##|*IDENT=page-services-dhcpv6server

##|*NAME=Services: DHCPv6 server page

##|*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}"]);

			$numbervalue['value'] = htmlspecialchars($_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 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');

		} 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;

	}

}

$closehead = false;

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

$shortcut_section = "dhcp6";

include("head.inc");

?>

<script type="text/javascript" src="/javascript/row_helper.js">

</script>

<script type="text/javascript">

//<![CDATA[

	rowname[0] = "number";

	rowtype[0] = "textbox";

	rowsize[0] = "10";

	rowname[1] = "value";

	rowtype[1] = "textbox";

	rowsize[1] = "55";

//]]>

</script>

<script type="text/javascript">

//<![CDATA[

	function enable_change(enable_over) {

		var endis;

		endis = !(document.iform.enable.checked || enable_over);

		document.iform.range_from.disabled = endis;

		document.iform.range_to.disabled = endis;

		document.iform.prefixrange_from.disabled = endis;

		document.iform.prefixrange_to.disabled = endis;

		document.iform.prefixrange_length.disabled = endis;

		document.iform.dns1.disabled = endis;

		document.iform.dns2.disabled = endis;

		document.iform.dns3.disabled = endis;

		document.iform.dns4.disabled = endis;

		document.iform.deftime.disabled = endis;

		document.iform.maxtime.disabled = endis;

		//document.iform.gateway.disabled = endis;

		document.iform.dhcpv6leaseinlocaltime.disabled = endis;

		document.iform.domain.disabled = endis;

		document.iform.domainsearchlist.disabled = endis;

		document.iform.ddnsdomain.disabled = endis;

		document.iform.ddnsdomainprimary.disabled = endis;

		document.iform.ddnsdomainkeyname.disabled = endis;

		document.iform.ddnsdomainkey.disabled = endis;

		document.iform.ddnsupdate.disabled = endis;

		document.iform.ntp1.disabled = endis;

		document.iform.ntp2.disabled = endis;

		//document.iform.tftp.disabled = endis;

		document.iform.ldap.disabled = endis;

		document.iform.netboot.disabled = endis;

		document.iform.bootfile_url.disabled = endis;

	}

	function show_shownumbervalue() {

		document.getElementById("shownumbervaluebox").innerHTML='';

		aodiv = document.getElementById('shownumbervalue');

		aodiv.style.display = "block";

	}

	function show_ddns_config() {

		document.getElementById("showddnsbox").innerHTML='';

		aodiv = document.getElementById('showddns');

		aodiv.style.display = "block";

	}

	function show_ntp_config() {

		document.getElementById("showntpbox").innerHTML='';

		aodiv = document.getElementById('showntp');

		aodiv.style.display = "block";

	}

	/*

	function show_tftp_config() {

		document.getElementById("showtftpbox").innerHTML='';

		aodiv = document.getElementById('showtftp');

		aodiv.style.display = "block";

	}

	*/

	function show_ldap_config() {

		document.getElementById("showldapbox").innerHTML='';

		aodiv = document.getElementById('showldap');

		aodiv.style.display = "block";

	}

	function show_netboot_config() {

		document.getElementById("shownetbootbox").innerHTML='';

		aodiv = document.getElementById('shownetboot');

		aodiv.style.display = "block";

	}

//]]>

</script>

</head>

<body link="#0000CC" vlink="#0000CC" alink="#0000CC">

<?php include("fbegin.inc"); ?>

<form action="services_dhcpv6.php" method="post" name="iform" id="iform">

<?php if ($input_errors) print_input_errors($input_errors); ?>

<?php if ($savemsg) print_info_box($savemsg); ?>

<?php

	if ($dhcrelay_enabled) {

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

		include("fend.inc");

		echo "</body>";

		echo "</html>";

		exit;

	}

?>

<?php if (is_subsystem_dirty('staticmaps')): ?><p>

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

<?php endif; ?>

<table width="100%" border="0" cellpadding="0" cellspacing="0" summary="dhcpv6 server">

<tr><td>

<?php

	/* 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) {

		echo "<b>" . gettext("The DHCPv6 Server can only be enabled on interfaces configured with a static IPv6 address. This system has none.") . "<br/><br/>";

		echo "</td></tr></table></form>";

		include("fend.inc");

		echo "</body>";

		echo "</html>";

		exit;

	}

	display_top_tabs($tab_array);

?>

</td></tr>

<tr><td class="tabnavtbl">

<?php

$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);

?>

</td></tr>

<tr>

<td>

	<div id="mainarea">

		<table class="tabcont" width="100%" border="0" cellpadding="6" cellspacing="0" summary="main area">

		<tr>

			<td width="22%" valign="top" class="vncellreq"><?=gettext("DHCPv6 Server");?></td>

			<td width="78%" class="vtable">

				<input name="enable" type="checkbox" value="yes" <?php if ($pconfig['enable']) echo "checked=\"checked\""; ?> onclick="enable_change(false);" />

			<strong><?php printf(gettext("Enable DHCPv6 server on " .

			"%s " .

			"interface"),htmlspecialchars($iflist[$if]));?></strong></td>

			</tr>

			<?php

			/* the PPPoE Server could well have no IPv6 address and operate fine with just link-local, just hide these */

			if(is_ipaddrv6($ifcfgip)) {

			?>

			<tr>

			<td width="22%" valign="top" class="vncellreq"><?=gettext("Subnet");?></td>

			<td width="78%" class="vtable">

				<?=gen_subnetv6($ifcfgip, $ifcfgsn);?>

			</td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncellreq"><?=gettext("Subnet mask");?></td>

			<td width="78%" class="vtable">

				<?=$ifcfgsn;?> bits

			</td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncellreq"><?=gettext("Available range");?></td>

			<td width="78%" class="vtable">

			<?php

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

				$range_from++;

				echo $range_from;

			?>

			-

			<?php

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

				echo $range_to;

			?>

			</td>

			</tr>

			<?php } ?>

			<?php if($is_olsr_enabled): ?>

			<tr>

			<td width="22%" valign="top" class="vncellreq"><?=gettext("Subnet Mask");?></td>

			<td width="78%" class="vtable">

				<select name="netmask" class="formselect" id="netmask">

				<?php

				for ($i = 128; $i > 0; $i--) {

					if($i <> 127) {

						echo "<option value=\"{$i}\" ";

						if ($i == $pconfig['netmask']) echo "selected";

						echo ">" . $i . "</option>";

					}

				}

				?>

				</select>

			</td>

			</tr>

			<?php endif; ?>

			<tr>

			<td width="22%" valign="top" class="vncellreq"><?=gettext("Range");?></td>

			<td width="78%" class="vtable">

				<input name="range_from" type="text" class="formfld unknown" id="range_from" size="28" value="<?=htmlspecialchars($pconfig['range_from']);?>" />

				&nbsp;<?=gettext("to"); ?>&nbsp; <input name="range_to" type="text" class="formfld unknown" id="range_to" size="28" value="<?=htmlspecialchars($pconfig['range_to']);?>" />

			</td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncell"><?=gettext("Prefix Delegation Range");?></td>

			<td width="78%" class="vtable">

				<input name="prefixrange_from" type="text" class="formfld unknown" id="prefixrange_from" size="28" value="<?=htmlspecialchars($pconfig['prefixrange_from']);?>" />

				&nbsp;<?=gettext("to"); ?>&nbsp; <input name="prefixrange_to" type="text" class="formfld unknown" id="prefixrange_to" size="28" value="<?=htmlspecialchars($pconfig['prefixrange_to']);?>" />

				&nbsp;<br /><?=gettext("Prefix Delegation Size"); ?>:&nbsp; <select name="prefixrange_length" class="formselect" id="prefixrange_length">

					<option value="48" <?php if($pconfig['prefixrange_length'] == 48) echo "selected=\"selected\""; ?>>48</option>

					<option value="52" <?php if($pconfig['prefixrange_length'] == 52) echo "selected=\"selected\""; ?>>52</option>

					<option value="56" <?php if($pconfig['prefixrange_length'] == 56) echo "selected=\"selected\""; ?>>56</option>

					<option value="60" <?php if($pconfig['prefixrange_length'] == 60) echo "selected=\"selected\""; ?>>60</option>

					<option value="62" <?php if($pconfig['prefixrange_length'] == 62) echo "selected=\"selected\""; ?>>62</option>

					<option value="63" <?php if($pconfig['prefixrange_length'] == 63) echo "selected=\"selected\""; ?>>63</option>

					<option value="64" <?php if($pconfig['prefixrange_length'] == 64) echo "selected=\"selected\""; ?>>64</option>

				</select> <br />

				<?php echo gettext("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."); ?>

			</td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncell"><?=gettext("DNS servers");?></td>

			<td width="78%" class="vtable">

				<input name="dns1" type="text" class="formfld unknown" id="dns1" size="28" value="<?=htmlspecialchars($pconfig['dns1']);?>" /><br />

				<input name="dns2" type="text" class="formfld unknown" id="dns2" size="28" value="<?=htmlspecialchars($pconfig['dns2']);?>" /><br />

				<input name="dns3" type="text" class="formfld unknown" id="dns3" size="28" value="<?=htmlspecialchars($pconfig['dns3']);?>" /><br />

				<input name="dns4" type="text" class="formfld unknown" id="dns4" size="28" value="<?=htmlspecialchars($pconfig['dns4']);?>" /><br />

				<?=gettext("NOTE: leave blank to use the system default DNS servers - this interface's IP if DNS forwarder is enabled, otherwise the servers configured on the General page.");?>

			</td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncell"><?=gettext("Domain name");?></td>

			<td width="78%" class="vtable">

				<input name="domain" type="text" class="formfld unknown" id="domain" size="28" value="<?=htmlspecialchars($pconfig['domain']);?>" /><br />

				 <?=gettext("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.");?>

			 </td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncell"><?=gettext("Domain search list");?></td>

			<td width="78%" class="vtable">

				<input name="domainsearchlist" type="text" class="formfld unknown" id="domainsearchlist" size="28" value="<?=htmlspecialchars($pconfig['domainsearchlist']);?>" /><br />

				<?=gettext("The DHCP server can optionally provide a domain search list. Use the semicolon character as separator");?>

			</td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncell"><?=gettext("Default lease time");?></td>

			<td width="78%" class="vtable">

				<input name="deftime" type="text" class="formfld unknown" id="deftime" size="10" value="<?=htmlspecialchars($pconfig['deftime']);?>" />

				<?=gettext("seconds");?><br />

				<?=gettext("This is used for clients that do not ask for a specific " .

				"expiration time."); ?><br />

				<?=gettext("The default is 7200 seconds.");?>

			</td>

			</tr>

			<tr>

			<td width="22%" valign="top" class="vncell"><?=gettext("Maximum lease time");?></td>

			<td width="78%" class="vtable">

				<input name="maxtime" type="text" class="formfld unknown" id="maxtime" size="10" value="<?=htmlspecialchars($pconfig['maxtime']);?>" />