pfSense

<?php

/* $Id$ */

/*

	firewall_aliases.php

	Copyright (C) 2004 Scott Ullrich

	All rights reserved.

	originially 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.

	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:	aliases

*/

##|+PRIV

##|*IDENT=page-firewall-aliases

##|*NAME=Firewall: Aliases page

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

##|*MATCH=firewall_aliases.php*

##|-PRIV

require("guiconfig.inc");

require_once("functions.inc");

require_once("filter.inc");

require_once("shaper.inc");

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

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

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

if ($_POST) {

	$pconfig = $_POST;

	if ($_POST['apply']) {

		$retval = 0;

		/* reload all components that use aliases */

		$retval = filter_configure();

		if(stristr($retval, "error") <> true)

		    $savemsg = get_std_save_message($retval);

		else

		    $savemsg = $retval;

		if ($retval == 0)

			clear_subsystem_dirty('aliases');

	}

}

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

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

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

		$is_alias_referenced = false;

		$referenced_by = false;

		$alias_name = $a_aliases[$_GET['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', 'advancedoutbound', 'rule'), array('source', 'network'), $alias_name, $is_alias_referenced, $referenced_by);

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

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

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

		find_alias_reference(array('nat', 'advancedoutbound', '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);

		if($is_alias_referenced == true) {

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

		} else {

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

			write_config();

			filter_configure();

			mark_subsystem_dirty('aliases');

			header("Location: firewall_aliases.php");

			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;

			}

		}

	}

}

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

include("head.inc");

?>

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

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

<form action="firewall_aliases.php" method="post">

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

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

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

<?php endif; ?>

<?php pfSense_handle_custom_code("/usr/local/pkg/firewall_aliases/pre_table"); ?>

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

<tr><td class="tabnavtbl">

		<?php

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

	$tab_array = array();

	$tab_array[] = array(gettext("IP"),($tab=="ip"? 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");

	display_top_tabs($tab_array);

	?>

		</td></tr>

<tr><td><div id="mainarea">

		<table class="tabcont" width="100%" border="0" cellpadding="0" cellspacing="0">

		<tr>

  <td width="20%" class="listhdrr"><?=gettext("Name"); ?></td>

  <td width="43%" class="listhdrr"><?=gettext("Values"); ?></td>

  <td width="30%" class="listhdr"><?=gettext("Description"); ?></td>

  <td width="7%" class="list">

    <table  border="0" cellspacing="0" cellpadding="1">

      <tr>

	<td valign="middle" width="17">&nbsp;</td>

        <td valign="middle"><a href="firewall_aliases_edit.php?tab=<?=$tab?>"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_plus.gif" width="17" height="17" border="0" <?=dom_title(gettext("Add a new alias"));?>></a></td>

      </tr>

    </table>

  </td>

</tr>

	  <?php

	  asort($a_aliases);

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

		  unset ($show_alias);

		  switch ($tab){

		  	case "all":

		  	$show_alias= true;

		  	break;

			case "ip":

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

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

			  </td>

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

			      <?php

				if ($alias["url"]) {

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

				}

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

					foreach($alias["aliasurl"] as $aliasurl)

						echo $aliasurl . "<br/>";

				}

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

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

				echo $addresses;

				if(count($tmpaddr) > 10) {

					echo "...";

				}

			    ?>

			  </td>

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

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

			  </td>

			  <td valign="middle" nowrap class="list">

			    <table border="0" cellspacing="0" cellpadding="1">

			      <tr>

			        <td valign="middle"><a href="firewall_aliases_edit.php?id=<?=$i;?>"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_e.gif" width="17" height="17" border="0" <?=dom_title(gettext("Edit alias")." {$alias['name']}");?>></a></td>

				<td><a href="firewall_aliases.php?act=del&id=<?=$i;?>" onclick="return confirm('<?=gettext("Do you really want to delete this alias? All elements that still use it will become invalid (e.g. filter rules)!");?>')"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_x.gif" width="17" height="17" border="0" <?=dom_title(gettext("Delete alias")." {$alias['name']}");?>></a></td>

			      </tr>

			    </table>

			  </td>

			</tr>

		  <?php

		  }

	  }?>

<tr>

    <td colspan="3"/>&nbsp;</td>

    <td valign="middle" nowrap class="list">

        <table border="0" cellspacing="0" cellpadding="1">

            <tbody>

                <tr>

                    <td valign="middle">

                        <a href="firewall_aliases_edit.php?tab=<?=$tab?>"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_plus.gif" width="17" height="17" border="0" <?=dom_title(gettext("Add a new alias")); ?>></a>

                    </td>

                    <td valign="middle">

                        <a href="firewall_aliases_import.php"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_import_alias.gif" width="17" height="17" border="0" <?=dom_title(gettext("Bulk import aliases from list"));?> alt="" /></a>                 

                    </td>

                </tr>

            </tbody>

        </table>

    </td>

</tr>

  <td class="tabcont" colspan="3">

   <p><span class="vexpl"><span class="red"><strong><?=gettext("Note:"); ?><br></strong></span><div style="overflow:hidden; text-align:justify;"><?=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. You can enter the name of an alias instead of the host, network or port in all fields that have a red background. The alias will be resolved according to the list above. If an alias cannot be resolved (e.g. because you deleted it), the corresponding element (e.g. filter/NAT/shaper rule) will be considered invalid and skipped."); ?></div></span></p>

  </td>

</tr>

</table>

	</div>

    </td>

  </tr>

 </table>

</form>

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

</body>

</html>