<?php
/*
	interfaces_groups_edit.php

	Copyright (C) 2013-2015 Electric Sheep Fencing, LP
	Copyright (C) 2009 Ermal Luçi
	Copyright (C) 2004 Scott Ullrich
	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:	/sbin/ifconfig
	pfSense_MODULE:	interfaces
*/

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


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

$pgtitle = array(gettext("Interfaces"),gettext("Groups"),gettext("Interface Group Edit"));
$shortcut_section = "interfaces";

if (!is_array($config['ifgroups']['ifgroupentry'])) {
	$config['ifgroups']['ifgroupentry'] = array();
}

$a_ifgroups = &$config['ifgroups']['ifgroupentry'];

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

if (isset($id) && $a_ifgroups[$id]) {
	$pconfig['ifname'] = $a_ifgroups[$id]['ifname'];
	$pconfig['members'] = $a_ifgroups[$id]['members'];
	$pconfig['descr'] = html_entity_decode($a_ifgroups[$id]['descr']);
}

$interface_list = get_configured_interface_with_descr();
$interface_list_disabled = get_configured_interface_with_descr(false, true);

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

	if (!isset($id)) {
		foreach ($a_ifgroups as $group_entry)
			if ($group_entry['ifname'] == $_POST['ifname'])
				$input_errors[] = gettext("Group name already exists!");
	}
	if (preg_match("/([^a-zA-Z])+/", $_POST['ifname'], $match)) {
		$input_errors[] = gettext("Only letters A-Z are allowed as the group name.");
	}

	/* chech if ifname is the same as an interface name */
	foreach ($interface_list as $gif => $gdescr) {
		if ($gdescr == $_POST['ifname'] || $gif == $_POST['ifname'])
			$input_errors[] = "The specified group name is already used by an interface. Please choose another name.";
	}

	$members = isset($_POST['members']) ? join(' ', $_POST['members']) : "";

	if (!$input_errors) {
		$ifgroupentry = array();
		$ifgroupentry['members'] = $members;
		$ifgroupentry['descr'] = $_POST['descr'];

		// Edit group name
		if (isset($id) && $a_ifgroups[$id] && $_POST['ifname'] != $a_ifgroups[$id]['ifname']) {
			if (!empty($config['filter']) && is_array($config['filter']['rule'])) {
				foreach ($config['filter']['rule'] as $ridx => $rule) {
					if (isset($rule['floating'])) {
						$rule_ifs = explode(",", $rule['interface']);
						$rule_changed = false;
						foreach ($rule_ifs as $rule_if_id => $rule_if) {
							if ($rule_if == $a_ifgroups[$id]['ifname']) {
								$rule_ifs[$rule_if_id] = $_POST['ifname'];
								$rule_changed = true;
							}
						}
						if ($rule_changed) {
							$config['filter']['rule'][$ridx]['interface'] = implode(",", $rule_ifs);
						}
					} else {
						if ($rule['interface'] == $a_ifgroups[$id]['ifname']) {
							$config['filter']['rule'][$ridx]['interface'] = $_POST['ifname'];
						}
					}
				}
			}
			if (!empty($config['nat']) && is_array($config['nat']['rule'])) {
				foreach ($config['nat']['rule'] as $ridx => $rule) {
					if ($rule['interface'] == $a_ifgroups[$id]['ifname']) {
						$config['nat']['rule'][$ridx]['interface'] = $_POST['ifname'];
					}
				}
			}
			$omembers = explode(" ", $a_ifgroups[$id]['members']);
			if (count($omembers) > 0) {
				foreach ($omembers as $ifs) {
					$realif = get_real_interface($ifs);
					if ($realif) {
						mwexec("/sbin/ifconfig {$realif} -group " . $a_ifgroups[$id]['ifname']);
					}
				}
			}
			$ifgroupentry['ifname'] = $_POST['ifname'];
			$a_ifgroups[$id] = $ifgroupentry;

		// Edit old group
		} else if (isset($id) && $a_ifgroups[$id]) {
			$omembers = explode(" ", $a_ifgroups[$id]['members']);
			$nmembers = explode(" ", $members);
			$delmembers = array_diff($omembers, $nmembers);
			if (count($delmembers) > 0) {
				foreach ($delmembers as $ifs) {
					$realif = get_real_interface($ifs);
					if ($realif) {
						mwexec("/sbin/ifconfig {$realif} -group " . $a_ifgroups[$id]['ifname']);
					}
				}
			}
			$ifgroupentry['ifname'] = $_POST['ifname'];
			$a_ifgroups[$id] = $ifgroupentry;

		// Create new group
		} else {
			$ifgroupentry['ifname'] = $_POST['ifname'];
			$a_ifgroups[] = $ifgroupentry;
		}

		write_config();
		interface_group_setup($ifgroupentry);

		header("Location: interfaces_groups.php");
		exit;
	} else {
		$pconfig['descr'] = $_POST['descr'];
		$pconfig['members'] = $members;
	}
}

include("head.inc");

if ($input_errors) {
	print_input_errors($input_errors);
}

?>
<div id="inputerrors"></div>
<?php
$tab_array = array();
$tab_array[0]  = array(gettext("Interface assignments"), false, "interfaces_assign.php");
$tab_array[1]  = array(gettext("Interface Groups"), true, "interfaces_groups.php");
$tab_array[2]  = array(gettext("Wireless"), false, "interfaces_wireless.php");
$tab_array[3]  = array(gettext("VLANs"), false, "interfaces_vlan.php");
$tab_array[4]  = array(gettext("QinQs"), false, "interfaces_qinq.php");
$tab_array[5]  = array(gettext("PPPs"), false, "interfaces_ppps.php");
$tab_array[7]  = array(gettext("GRE"), false, "interfaces_gre.php");
$tab_array[8]  = array(gettext("GIF"), false, "interfaces_gif.php");
$tab_array[9]  = array(gettext("Bridges"), false, "interfaces_bridge.php");
$tab_array[10] = array(gettext("LAGG"), false, "interfaces_lagg.php");
display_top_tabs($tab_array);

require('classes/Form.class.php');
$form = new Form;
$section = new Form_Section('Interface Group Edit');

$section->addInput(new Form_Input(
	'ifname',
	'Group Name',
	'text',
	$pconfig['ifname'],
	['placeholder' => 'Group Name']
))->setWidth(6)->setHelp('No numbers or spaces are allowed. '.
	'Only characters in a-zA-Z');

$section->addInput(new Form_Input(
	'descr',
	'Group Description',
	'text',
	$pconfig['descr'],
	['placeholder' => 'Group Description']
))->setWidth(6)->setHelp('You may enter a group decsription '.
	'here for your reference (not parsed)');

$section->addInput(new Form_Select(
	'members[]',
	'Group Members',
	explode(' ', $pconfig['members']),
	$interface_list,
	true
))->setWidth(6)->setHelp('NOTE: Rules for WAN type '.
	'interfaces in groups do not contain the reply-to mechanism upon which '.
	'Multi-WAN typically relies. '.
	'<a href="https://doc.pfsense.org/index.php/ifgroups">More Information</a>');

if (isset($id) && $a_ifgroups[$id]) {
	$form->addGlobal(new Form_Input(
		'id',
		'id',
		'hidden',
		$id
	));
}

$form->add($section);
print $form;

unset($interface_list);
unset($interface_list_disabled);
include("fend.inc");
?>