<?php
/* $Id$ */
/*
	services_unbound_host_edit.php
	part of the pfSense project (https://www.pfsense.org)
	Copyright (C) 2014 Warren Baker (warren@decoy.co.za)
	Copyright (C) 2013-2015 Electric Sheep Fencing, LP
	All rights reserved.

	Copyright (C) 2003-2004 Bob Zoller <bob@kludgebox.com> and Manuel Kasper <mk@neon1.net>.
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/
/*
	pfSense_MODULE:	dnsresolver
*/

##|+PRIV
##|*IDENT=page-services-dnsresolver-edithost
##|*NAME=Services: DNS Resolver: Edit host page
##|*DESCR=Allow access to the 'Services: DNS Resolver: Edit host' page.
##|*MATCH=services_unbound_host_edit.php*
##|-PRIV

if (isset($_POST['referer'])) {
	$referer = $_POST['referer'];
} else {
	$referer = (isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '/services_unbound.php');
}

function hostcmp($a, $b) {
	return strcasecmp($a['host'], $b['host']);
}

function hosts_sort() {
	global $g, $config;

	if (!is_array($config['unbound']['hosts'])) {
		return;
	}

	usort($config['unbound']['hosts'], "hostcmp");
}

require("guiconfig.inc");

if (!is_array($config['unbound']['hosts'])) {
	$config['unbound']['hosts'] = array();
}

$a_hosts = &$config['unbound']['hosts'];

if (is_numericint($_GET['id'])) {
	$id = $_GET['id'];
}
if (isset($_POST['id']) && is_numericint($_POST['id'])) {
	$id = $_POST['id'];
}

if (isset($id) && $a_hosts[$id]) {
	$pconfig['host'] = $a_hosts[$id]['host'];
	$pconfig['domain'] = $a_hosts[$id]['domain'];
	$pconfig['ip'] = $a_hosts[$id]['ip'];
	$pconfig['descr'] = $a_hosts[$id]['descr'];
	$pconfig['aliases'] = $a_hosts[$id]['aliases'];
}

if ($_POST) {

	unset($input_errors);
	$pconfig = $_POST;

	/* input validation */
	$reqdfields = explode(" ", "domain ip");
	$reqdfieldsn = array(gettext("Domain"), gettext("IP address"));

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

	if ($_POST['host']) {
		if (!is_hostname($_POST['host'])) {
			$input_errors[] = gettext("The hostname can only contain the characters A-Z, 0-9, '_' and '-'. It may not start or end with '-'.");
		} else {
			if (!is_unqualified_hostname($_POST['host'])) {
				$input_errors[] = gettext("A valid hostname is specified, but the domain name part should be omitted");
			}
		}
	}

	if (($_POST['domain'] && !is_domain($_POST['domain']))) {
		$input_errors[] = gettext("A valid domain must be specified.");
	}

	if (($_POST['ip'] && !is_ipaddr($_POST['ip']))) {
		$input_errors[] = gettext("A valid IP address must be specified.");
	}

	/* collect aliases */
	$aliases = array();
	foreach ($_POST as $key => $value) {
		$entry = '';
		if (!substr_compare('aliashost', $key, 0, 9)) {
			$entry = substr($key, 9);
			$field = 'host';
		} elseif (!substr_compare('aliasdomain', $key, 0, 11)) {
			$entry = substr($key, 11);
			$field = 'domain';
		} elseif (!substr_compare('aliasdescription', $key, 0, 16)) {
			$entry = substr($key, 16);
			$field = 'description';
		}
		if (ctype_digit($entry)) {
			$aliases[$entry][$field] = $value;
		}
	}
	$pconfig['aliases']['item'] = $aliases;

	/* validate aliases */
	foreach ($aliases as $idx => $alias) {
		$aliasreqdfields = array('aliasdomain' . $idx);
		$aliasreqdfieldsn = array(gettext("Alias Domain"));

		do_input_validation($_POST, $aliasreqdfields, $aliasreqdfieldsn, $input_errors);
		if ($alias['host']) {
			if (!is_hostname($alias['host'])) {
				$input_errors[] = gettext("Hostnames in an alias list can only contain the characters A-Z, 0-9 and '-'. They may not start or end with '-'.");
			} else {
				if (!is_unqualified_hostname($alias['host'])) {
					$input_errors[] = gettext("A valid alias hostname is specified, but the domain name part should be omitted");
				}
			}
		}
		if (($alias['domain'] && !is_domain($alias['domain']))) {
			$input_errors[] = gettext("A valid domain must be specified in alias list.");
		}
	}

	/* check for overlaps */
	foreach ($a_hosts as $hostent) {
		if (isset($id) && ($a_hosts[$id]) && ($a_hosts[$id] === $hostent)) {
			continue;
		}

		if (($hostent['host'] == $_POST['host']) &&
		    ($hostent['domain'] == $_POST['domain']) &&
		    ((is_ipaddrv4($hostent['ip']) && is_ipaddrv4($_POST['ip'])) || (is_ipaddrv6($hostent['ip']) && is_ipaddrv6($_POST['ip'])))) {
			$input_errors[] = gettext("This host/domain already exists.");
			break;
		}
	}

	if (!$input_errors) {
		$hostent = array();
		$hostent['host'] = $_POST['host'];
		$hostent['domain'] = $_POST['domain'];
		$hostent['ip'] = $_POST['ip'];
		$hostent['descr'] = $_POST['descr'];
		$hostent['aliases']['item'] = $aliases;

		if (isset($id) && $a_hosts[$id]) {
			$a_hosts[$id] = $hostent;
		} else {
			$a_hosts[] = $hostent;
		}
		hosts_sort();

		mark_subsystem_dirty('unbound');

		write_config();

		header("Location: services_unbound.php");
		exit;
	}
}

$pgtitle = array(gettext("Services"), gettext("DNS Resolver"), gettext("Edit host"));
$shortcut_section = "resolver";
include("head.inc");

?>

<body onload="<?= $jsevents["body"]["onload"] ?>">
<?php include("fbegin.inc"); ?>

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

<script type="text/javascript">
//<![CDATA[
	rowname[0] = "aliashost";
	rowtype[0] = "textbox";
	rowsize[0] = "20";
	rowname[1] = "aliasdomain";
	rowtype[1] = "textbox";
	rowsize[1] = "20";
	rowname[2] = "aliasdescription";
	rowtype[2] = "textbox";
	rowsize[2] = "20";
//]]>
</script>

<?php if ($input_errors) print_input_errors($input_errors); ?>
	<form action="services_unbound_host_edit.php" method="post" name="iform" id="iform">
		<table width="100%" border="0" cellpadding="6" cellspacing="0" summary="host edit">
			<tr>
				<td colspan="2" valign="top" class="listtopic"><?=gettext("Edit DNS Resolver entry");?></td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncell"><?=gettext("Host");?></td>
				<td width="78%" class="vtable">
					<input name="host" type="text" class="formfld unknown" id="host" size="40" value="<?=htmlspecialchars($pconfig['host']);?>" /><br />
					<span class="vexpl"><?=gettext("Name of the host, without domain part"); ?><br />
						<?=gettext("e.g."); ?> <em><?=gettext("myhost"); ?></em>
					</span>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncellreq"><?=gettext("Domain");?></td>
				<td width="78%" class="vtable">
					<input name="domain" type="text" class="formfld unknown" id="domain" size="40" value="<?=htmlspecialchars($pconfig['domain']);?>" /><br />
					<span class="vexpl"><?=gettext("Domain of the host"); ?><br />
						<?=gettext("e.g."); ?> <em><?=gettext("example.com"); ?></em>
					</span>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncellreq"><?=gettext("IP address");?></td>
				<td width="78%" class="vtable">
					<input name="ip" type="text" class="formfld unknown" id="ip" size="40" value="<?=htmlspecialchars($pconfig['ip']);?>" /><br />
					<span class="vexpl"><?=gettext("IP address of the host"); ?><br />
						<?=gettext("e.g."); ?> <em>192.168.100.100</em> <?=gettext("or"); ?> <em>fd00:abcd::1</em>
					</span>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncell"><?=gettext("Description");?></td>
				<td width="78%" class="vtable">
					<input name="descr" type="text" class="formfld unknown" id="descr" size="40" value="<?=htmlspecialchars($pconfig['descr']);?>" /><br />
					<span class="vexpl"><?=gettext("You may enter a description here for your reference (not parsed).");?></span>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncell"><div id="addressnetworkport"><?=gettext("Aliases"); ?></div></td>
				<td width="78%" class="vtable">
					<table id="maintable" summary="aliases">
						<tbody>
							<tr>
								<td colspan="4">
									<div style="padding:5px; margin-top: 16px; margin-bottom: 16px; border:1px dashed #000066; background-color: #ffffff; color: #000000; font-size: 8pt;" id="itemhelp">
										<?=gettext("Enter additional names for this host."); ?>
									</div>
								</td>
							</tr>
							<tr>
								<td><div id="onecolumn"><?=gettext("Host");?></div></td>
								<td><div id="twocolumn"><?=gettext("Domain");?></div></td>
								<td><div id="threecolumn"><?=gettext("Description");?></div></td>
							</tr>
							<?php
								$counter = 0;
								if ($pconfig['aliases']['item']):
									foreach ($pconfig['aliases']['item'] as $item):
										$host = $item['host'];
										$domain = $item['domain'];
										$description = $item['description'];
							?>
							<tr>
								<td>
									<input autocomplete="off" name="aliashost<?php echo $counter; ?>" type="text" class="formfld unknown" id="aliashost<?php echo $counter; ?>" size="20" value="<?=htmlspecialchars($host);?>" />
								</td>
								<td>
									<input autocomplete="off" name="aliasdomain<?php echo $counter; ?>" type="text" class="formfld unknown" id="aliasdomain<?php echo $counter; ?>" size="20" value="<?=htmlspecialchars($domain);?>" />
								</td>
								<td>
									<input name="aliasdescription<?php echo $counter; ?>" type="text" class="formfld unknown" id="aliasdescription<?php echo $counter; ?>" size="20" value="<?=htmlspecialchars($description);?>" />
								</td>
								<td>
									<a onclick="removeRow(this); return false;" href="#">
										<img border="0" src="/themes/<?echo $g['theme'];?>/images/icons/icon_x.gif" alt="" title="<?=gettext("remove this entry"); ?>" />
									</a>
								</td>
							</tr>
							<?php
										$counter++;
									endforeach;
								endif;
							?>
						</tbody>
					</table>
					<a onclick="javascript:addRowTo('maintable', 'formfldalias'); return false;" href="#">
						<img border="0" src="/themes/<?= $g['theme']; ?>/images/icons/icon_plus.gif" alt="" title="<?=gettext("add another entry");?>" />
					</a>
					<script type="text/javascript">
					//<![CDATA[
						field_counter_js = 3;
						rows = 1;
						totalrows = <?php echo $counter; ?>;
						loaded = <?php echo $counter; ?>;
					//]]>
					</script>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top">&nbsp;</td>
				<td width="78%">
					<input name="Submit" type="submit" class="formbtn" value="<?=gettext("Save");?>" />
					<input type="button" class="formbtn" value="<?=gettext("Cancel");?>" onclick="window.location.href='<?=$referer;?>'" />
					<input name="referer" type="hidden" value="<?=$referer;?>" />
					<?php if (isset($id) && $a_hosts[$id]): ?>
					<input name="id" type="hidden" value="<?=htmlspecialchars($id);?>" />
					<?php endif; ?>
				</td>
			</tr>
		</table>
	</form>
<?php include("fend.inc"); ?>
</body>
</html>