pfSense

<?php

/*

 * firewall_aliases.php

 *

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

 * Copyright (c) 2004-2018 Rubicon Communications, LLC (Netgate)

 * All rights reserved.

 *

 * originally based on m0n0wall (http://m0n0.ch/wall)

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

 * All rights reserved.

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 * http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

##|+PRIV

##|*IDENT=page-firewall-aliases

##|*NAME=Firewall: Aliases

##|*DESCR=Allow access to the 'Firewall: Aliases' page.

##|*MATCH=firewall_aliases.php*

##|-PRIV

require_once("guiconfig.inc");

require_once("functions.inc");

require_once("filter.inc");

require_once("shaper.inc");

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

	$config['aliases'] = array();

}

if (!is_array($config['aliases']['alias'])) {

	$config['aliases']['alias'] = array();

}

$a_aliases = &$config['aliases']['alias'];

$tab = ($_REQUEST['tab'] == "" ? "ip" : preg_replace("/\W/", "", $_REQUEST['tab']));

if ($_POST['apply']) {

	$retval = 0;

	/* reload all components that use aliases */

	$retval |= filter_configure();

	if ($retval == 0) {

		clear_subsystem_dirty('aliases');

	}

}

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

	if ($a_aliases[$_POST['id']]) {

		/* make sure rule is not being referenced by any nat or filter rules */

		$is_alias_referenced = false;

		$referenced_by = false;

		$alias_name = $a_aliases[$_POST['id']]['name'];

		// Firewall rules

		find_alias_reference(array('filter', 'rule'), array('source', 'address'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('filter', 'rule'), array('destination', 'address'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('filter', 'rule'), array('source', 'port'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('filter', 'rule'), array('destination', 'port'), $alias_name, $is_alias_referenced, $referenced_by);

		// NAT Rules

		find_alias_reference(array('nat', 'rule'), array('source', 'address'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'rule'), array('source', 'port'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'rule'), array('destination', 'address'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'rule'), array('destination', 'port'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'rule'), array('target'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'rule'), array('local-port'), $alias_name, $is_alias_referenced, $referenced_by);

		// NAT 1:1 Rules

		//find_alias_reference(array('nat', 'onetoone'), array('external'), $alias_name, $is_alias_referenced, $referenced_by);

		//find_alias_reference(array('nat', 'onetoone'), array('source', 'address'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'onetoone'), array('destination', 'address'), $alias_name, $is_alias_referenced, $referenced_by);

		// NAT Outbound Rules

		find_alias_reference(array('nat', 'outbound', 'rule'), array('source', 'network'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'outbound', 'rule'), array('sourceport'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'outbound', 'rule'), array('destination', 'address'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'outbound', 'rule'), array('dstport'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('nat', 'outbound', 'rule'), array('target'), $alias_name, $is_alias_referenced, $referenced_by);

		// Alias in an alias

		find_alias_reference(array('aliases', 'alias'), array('address'), $alias_name, $is_alias_referenced, $referenced_by);

		// Load Balancer

		find_alias_reference(array('load_balancer', 'lbpool'), array('port'), $alias_name, $is_alias_referenced, $referenced_by);

		find_alias_reference(array('load_balancer', 'virtual_server'), array('port'), $alias_name, $is_alias_referenced, $referenced_by);

		// Static routes

		find_alias_reference(array('staticroutes', 'route'), array('network'), $alias_name, $is_alias_referenced, $referenced_by);

		if ($is_alias_referenced == true) {

			$delete_error = sprintf(gettext("Cannot delete alias. Currently in use by %s."), htmlspecialchars($referenced_by));

		} else {

			if (preg_match("/urltable/i", $a_aliases[$_POST['id']]['type'])) {

				// this is a URL table type alias, delete its file as well

				unlink_if_exists("/var/db/aliastables/" . $a_aliases[$_POST['id']]['name'] . ".txt");

			}

			unset($a_aliases[$_POST['id']]);

			if (write_config(gettext("Deleted a firewall alias."))) {

				filter_configure();

				mark_subsystem_dirty('aliases');

			}

			header("Location: firewall_aliases.php?tab=" . $tab);

			exit;

		}

	}

}

function find_alias_reference($section, $field, $origname, &$is_alias_referenced, &$referenced_by) {

	global $config;

	if (!$origname || $is_alias_referenced) {

		return;

	}

	$sectionref = &$config;

	foreach ($section as $sectionname) {

		if (is_array($sectionref) && isset($sectionref[$sectionname])) {

			$sectionref = &$sectionref[$sectionname];

		} else {

			return;

		}

	}

	if (is_array($sectionref)) {

		foreach ($sectionref as $itemkey => $item) {

			$fieldfound = true;

			$fieldref = &$sectionref[$itemkey];

			foreach ($field as $fieldname) {

				if (is_array($fieldref) && isset($fieldref[$fieldname])) {

					$fieldref = &$fieldref[$fieldname];

				} else {

					$fieldfound = false;

					break;

				}

			}

			if ($fieldfound && $fieldref == $origname) {

				$is_alias_referenced = true;

				if (is_array($item)) {

					$referenced_by = $item['descr'];

				}

				break;

			}

		}

	}

}

$tab_array = array();

$tab_array[] = array(gettext("IP"),    ($tab == "ip" ? true : ($tab == "host" ? true : ($tab == "network" ? true : false))), "/firewall_aliases.php?tab=ip");

$tab_array[] = array(gettext("Ports"), ($tab == "port"? true : false), "/firewall_aliases.php?tab=port");

$tab_array[] = array(gettext("URLs"),  ($tab == "url"? true : false), "/firewall_aliases.php?tab=url");

$tab_array[] = array(gettext("All"),   ($tab == "all"? true : false), "/firewall_aliases.php?tab=all");

foreach ($tab_array as $dtab) {

	if ($dtab[1] == true) {

		$bctab = $dtab[0];

		break;

	}

}

$pgtitle = array(gettext("Firewall"), gettext("Aliases"), $bctab);

$pglinks = array("", "firewall_aliases.php", "@self");

$shortcut_section = "aliases";

include("head.inc");

if ($delete_error) {

	print_info_box($delete_error, 'danger');

}

if ($_POST['apply']) {

	print_apply_result_box($retval);

}

if (is_subsystem_dirty('aliases')) {

	print_apply_box(gettext("The alias list has been changed.") . "<br />" . gettext("The changes must be applied for them to take effect."));

}

display_top_tabs($tab_array);

?>

<div class="panel panel-default">

	<div class="panel-heading"><h2 class="panel-title"><?=sprintf(gettext('Firewall Aliases %s'), $bctab)?></h2></div>

	<div class="panel-body">

<div class="table-responsive">

<table class="table table-striped table-hover table-condensed sortable-theme-bootstrap" data-sortable>

	<thead>

		<tr>

			<th><?=gettext("Name")?></th>

			<th><?=gettext("Values")?></th>

			<th><?=gettext("Description")?></th>

			<th><?=gettext("Actions")?></th>

		</tr>

	</thead>

	<tbody>

<?php

	asort($a_aliases);

	foreach ($a_aliases as $i => $alias):

		unset ($show_alias);

		switch ($tab) {

		case "all":

			$show_alias= true;

			break;

		case "ip":

		case "host":

		case "network":

			if (preg_match("/(host|network)/", $alias["type"])) {

				$show_alias= true;

			}

			break;

		case "url":

			if (preg_match("/(url)/i", $alias["type"])) {

				$show_alias= true;

			}

			break;

		case "port":

			if ($alias["type"] == "port") {

				$show_alias= true;

			}

			break;

		}

		if ($show_alias):

?>

		<tr>

			<td ondblclick="document.location='firewall_aliases_edit.php?id=<?=$i;?>';">

				<?=htmlspecialchars($alias['name'])?>

			</td>

			<td ondblclick="document.location='firewall_aliases_edit.php?id=<?=$i;?>';">

<?php

	if ($alias["url"]) {

		echo $alias["url"] . "<br />";

	} else {

		if (is_array($alias["aliasurl"])) {

			$aliasurls = implode(", ", array_slice($alias["aliasurl"], 0, 10));

			echo $aliasurls;

			if (is_array($aliasurls) && (count($aliasurls) > 10)) {

				echo "&hellip;<br />";

			}

			echo "<br />\n";

		}

		$tmpaddr = explode(" ", $alias['address']);

		$addresses = implode(", ", array_slice($tmpaddr, 0, 10));

		echo $addresses;

		if (count($tmpaddr) > 10) {

			echo '…';

		}

	}

?>

			</td>

			<td ondblclick="document.location='firewall_aliases_edit.php?id=<?=$i;?>';">

				<?=htmlspecialchars($alias['descr'])?>&nbsp;

			</td>

			<td>

				<a class="fa fa-pencil" title="<?=gettext("Edit alias"); ?>" href="firewall_aliases_edit.php?id=<?=$i?>"></a>

				<a class="fa fa-trash"	title="<?=gettext("Delete alias")?>" href="?act=del&amp;tab=<?=$tab?>&amp;id=<?=$i?>" usepost></a>

			</td>

		</tr>

<?php endif?>

<?php endforeach?>

	</tbody>

</table>

</div>

	</div>

</div>

<nav class="action-buttons">

	<a href="firewall_aliases_edit.php?tab=<?=$tab?>" role="button" class="btn btn-success btn-sm">

		<i class="fa fa-plus icon-embed-btn"></i>

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

	</a>

<?php

if (($tab == "ip") || ($tab == "port") || ($tab == "all")):

?>

	<a href="firewall_aliases_import.php?tab=<?=$tab?>" role="button" class="btn btn-primary btn-sm">

		<i class="fa fa-upload icon-embed-btn"></i>

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

	</a>

<?php

endif

?>

</nav>

<!-- Information section. Icon ID must be "showinfo" and the information <div> ID must be "infoblock".

	 That way jQuery (in pfenseHelpers.js) will automatically take care of the display. -->

<div>

	<div class="infoblock">

		<?php print_info_box(gettext('Aliases act as placeholders for real hosts, networks or ports. They can be used to minimize the number ' .

			'of changes that have to be made if a host, network or port changes.') . '<br />' .

			gettext('The name of an alias can be entered instead of the host, network or port where indicated. The alias will be resolved according to the list above.') . '<br />' .

			gettext('If an alias cannot be resolved (e.g. because it was deleted), the corresponding element (e.g. filter/NAT/shaper rule) will be considered invalid and skipped.'), 'info', false); ?>

	</div>

</div>

<?php

include("foot.inc");