<?php
/* $Id$ */
/*
	interfaces_gre_edit.php

	Copyright (C) 2013-2015 Electric Sheep Fencing, LP
	Copyright (C) 2008 Ermal Luçi
	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:	interfaces
*/

##|+PRIV
##|*IDENT=page-interfaces-gre-edit
##|*NAME=Interfaces: GRE: Edit page
##|*DESCR=Allow access to the 'Interfaces: GRE: Edit' page.
##|*MATCH=interfaces_gre_edit.php*
##|-PRIV

require("guiconfig.inc");
require_once("functions.inc");

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

if (!is_array($config['gres']['gre'])) {
	$config['gres']['gre'] = array();
}

$a_gres = &$config['gres']['gre'];

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

if (isset($id) && $a_gres[$id]) {
	$pconfig['if'] = $a_gres[$id]['if'];
	$pconfig['greif'] = $a_gres[$id]['greif'];
	$pconfig['remote-addr'] = $a_gres[$id]['remote-addr'];
	$pconfig['tunnel-remote-net'] = $a_gres[$id]['tunnel-remote-net'];
	$pconfig['tunnel-local-addr'] = $a_gres[$id]['tunnel-local-addr'];
	$pconfig['tunnel-remote-addr'] = $a_gres[$id]['tunnel-remote-addr'];
	$pconfig['link1'] = isset($a_gres[$id]['link1']);
	$pconfig['link2'] = isset($a_gres[$id]['link2']);
	$pconfig['link0'] = isset($a_gres[$id]['link0']);
	$pconfig['descr'] = $a_gres[$id]['descr'];
}

if ($_POST) {

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

	/* input validation */
	$reqdfields = explode(" ", "if remote-addr tunnel-local-addr tunnel-remote-addr tunnel-remote-net");
	$reqdfieldsn = array(gettext("Parent interface"), gettext("Remote tunnel endpoint IP address"), gettext("Local tunnel IP address"), gettext("Remote tunnel IP address"), gettext("Remote tunnel network"));

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

	if ((!is_ipaddr($_POST['tunnel-local-addr'])) ||
	    (!is_ipaddr($_POST['tunnel-remote-addr'])) ||
	    (!is_ipaddr($_POST['remote-addr']))) {
		$input_errors[] = gettext("The tunnel local and tunnel remote fields must have valid IP addresses.");
	}

	foreach ($a_gres as $gre) {
		if (isset($id) && ($a_gres[$id]) && ($a_gres[$id] === $gre)) {
			continue;
		}

		if (($gre['if'] == $_POST['if']) && ($gre['tunnel-remote-addr'] == $_POST['tunnel-remote-addr'])) {
			$input_errors[] = sprintf(gettext("A GRE tunnel with the network %s is already defined."), $gre['remote-network']);
			break;
		}
	}

	if (!$input_errors) {
		$gre = array();
		$gre['if'] = $_POST['if'];
		$gre['tunnel-local-addr'] = $_POST['tunnel-local-addr'];
		$gre['tunnel-remote-addr'] = $_POST['tunnel-remote-addr'];
		$gre['tunnel-remote-net'] = $_POST['tunnel-remote-net'];
		$gre['remote-addr'] = $_POST['remote-addr'];
		$gre['descr'] = $_POST['descr'];
		$gre['link1'] = isset($_POST['link1']);
		$gre['link2'] = isset($_POST['link2']);
		$gre['link0'] = isset($_POST['link0']);
		$gre['greif'] = $_POST['greif'];

		$gre['greif'] = interface_gre_configure($gre);
		if ($gre['greif'] == "" || !stristr($gre['greif'], "gre")) {
			$input_errors[] = gettext("Error occurred creating interface, please retry.");
		} else {
			if (isset($id) && $a_gres[$id]) {
				$a_gres[$id] = $gre;
			} else {
				$a_gres[] = $gre;
			}

			write_config();

			$confif = convert_real_interface_to_friendly_interface_name($gre['greif']);
			if ($confif <> "") {
				interface_configure($confif);
			}

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

$pgtitle = array(gettext("Interfaces"), gettext("GRE"), gettext("Edit"));
$shortcut_section = "interfaces";
include("head.inc");

?>

<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
<script type="text/javascript" src="/javascript/jquery.ipv4v6ify.js"></script>
<?php include("fbegin.inc"); ?>
<?php if ($input_errors) print_input_errors($input_errors); ?>
<form action="interfaces_gre_edit.php" method="post" name="iform" id="iform">
	<table width="100%" border="0" cellpadding="6" cellspacing="0" summary="interfaces gre edit">
		<tr>
			<td colspan="2" valign="top" class="listtopic"><?=gettext("GRE configuration");?></td>
		</tr>
		<tr>
			<td width="22%" valign="top" class="vncellreq"><?=gettext("Parent interface");?></td>
			<td width="78%" class="vtable">
				<select name="if" class="formselect">
				<?php
					$portlist = get_possible_listen_ips();
					foreach ($portlist as $ifn => $ifinfo) {
						echo "<option value=\"{$ifn}\"";
						if ($ifn == $pconfig['if']) {
							echo " selected=\"selected\"";
						}
						echo ">" . htmlspecialchars($ifinfo) . "</option>\n";
					}
				?>
				</select>
				<br />
				<span class="vexpl"><?=gettext("The interface here serves as the local address to be used for the GRE tunnel.");?></span>
			</td>
		</tr>
		<tr>
			<td valign="top" class="vncellreq"><?=gettext("Remote tunnel endpoint IP address");?></td>
			<td class="vtable">
				<input name="remote-addr" type="text" class="formfld unknown" id="remote-addr" size="16" value="<?=htmlspecialchars($pconfig['remote-addr']);?>" />
				<br />
				<span class="vexpl"><?=gettext("Peer address where encapsulated GRE packets will be sent ");?></span>
			</td>
		</tr>
		<tr>
			<td valign="top" class="vncellreq"><?=gettext("Local tunnel IP address ");?></td>
			<td class="vtable">
				<input name="tunnel-local-addr" type="text" class="formfld unknown" id="tunnel-local-addr" size="16" value="<?=htmlspecialchars($pconfig['tunnel-local-addr']);?>" />
				<br />
				<span class="vexpl"><?=gettext("Local IP address assigned inside this tunnel");?></span>
			</td>
		</tr>
		<tr>
			<td valign="top" class="vncellreq"><?=gettext("Remote tunnel IP address ");?></td>
			<td class="vtable">
				<input name="tunnel-remote-addr" type="text" class="formfld unknown ipv4v6" id="tunnel-remote-addr" size="16" value="<?=htmlspecialchars($pconfig['tunnel-remote-addr']);?>" />
				<select name="tunnel-remote-net" class="formselect ipv4v6" id="tunnel-remote-net">
				<?php
					for ($i = 128; $i > 0; $i--) {
						echo "<option value=\"{$i}\"";
						if ($i == $pconfig['tunnel-remote-net']) {
							echo " selected=\"selected\"";
						}
						echo ">" . $i . "</option>";
					}
				?>
				</select>
				<br />
				<span class="vexpl"><?=gettext("IP address inside this tunnel on the remote end. The subnet part is used for the determining the network that is tunneled.");?></span>
			</td>
		</tr>
		<tr>
			<td valign="top" class="vncell"><?=gettext("Mobile encapsulation");?></td>
			<td class="vtable">
				<input name="link0" type="checkbox" id="link0" <?if ($pconfig['link0']) echo "checked=\"checked\"";?> />
				<br />
				<span class="vexpl"><?=gettext("Check this box to use mobile encapsulation (IP protocol 55, RFC 2004). When unchecked, uses GRE encapsulation (IP protocol 47, RFCs 1701, 1702).");?></span>
			</td>
		</tr>
		<tr>
			<td valign="top" class="vncell"><?=gettext("Route search type");?></td>
			<td class="vtable">
				<input name="link1" type="checkbox" id="link1" <?if ($pconfig['link1']) echo "checked=\"checked\"";?> />
				<br />
				<span class="vexpl">
					<?=gettext("For correct operation, the GRE device needs a route to the destination".
					" that is less specific than the one over the tunnel.  (Basically, there".
					" needs to be a route to the decapsulating host that does not run over the".
					" tunnel, as this would be a loop.");?>
				</span>
			</td>
		</tr>
		<tr>
			<td valign="top" class="vncell"><?=gettext("WCCP version");?></td>
			<td class="vtable">
				<input name="link2" type="checkbox" id="link2" <?if ($pconfig['link2']) echo "checked=\"checked\"";?> />
				<br />
				<span class="vexpl"><?=gettext("Check this box for WCCP encapsulation version 2, or leave unchecked for version 1.");?></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($pconfig['descr']);?>" />
				<br /> <span class="vexpl"><?=gettext("You may enter a description here for your reference (not parsed).");?></span>
			</td>
		</tr>
		<tr>
			<td width="22%" valign="top">&nbsp;</td>
			<td width="78%">
				<input type="hidden" name="greif" value="<?=htmlspecialchars($pconfig['greif']); ?>" />
				<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) && $a_gres[$id]): ?>
				<input name="id" type="hidden" value="<?=htmlspecialchars($id);?>" />
			<?php endif; ?>
			</td>
		</tr>
	</table>
</form>
<?php include("fend.inc"); ?>
</body>
</html>