pfSense

<?php

/*

 * diag_arp.inc

 *

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

 * Copyright (c) 2004-2013 BSD Perimeter

 * Copyright (c) 2013-2016 Electric Sheep Fencing

 *

 * 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.

 */

require_once("config.gui.inc");

// Put this in an easy to use form

$dhcpmac = array();

$dhcpip = array();

function _getHostName($mac, $ip) {

	global $dhcpmac, $dhcpip;

	if ($dhcpmac[$mac]) {

		return $dhcpmac[$mac];

	} else if ($dhcpip[$ip]) {

		return $dhcpip[$ip];

	} else {

		exec("host -W 1 " . escapeshellarg($ip), $output);

		if (preg_match('/.*pointer ([A-Za-z_0-9.-]+)\..*/', $output[0], $matches)) {

			if ($matches[1] <> $ip) {

				return $matches[1];

			}

		}

	}

	return "";

}

function prepare_ARP_table($json = false) {

	global $dhcpmac, $dhcpip;

	$leases = system_get_dhcpleases();

	// Put this in an easy to use form

	$dhcpmac = array();

	$dhcpip = array();

	foreach ($leases['lease'] as $value) {

		$dhcpmac[$value['mac']] = $value['hostname'];

		$dhcpip[$value['ip']] = $value['hostname'];

	}

	$arp_table = system_get_arp_table();

	$i = 0;

	// if list 

	$ifdescrs = get_configured_interface_with_descr();

	foreach ($ifdescrs as $key => $interface) {

		$thisif = convert_friendly_interface_to_real_interface_name($key);

		if (!empty($thisif)) {

			$hwif[$thisif] = $interface;

		}

	}

	// Resolve hostnames and replace Z_ with "".  The intention

	// is to sort the list by hostnames, alpha and then the non

	// resolvable addresses will appear last in the list.

	$dnsavailable=1;

	$dns = trim(_getHostName("", "8.8.8.8"));

	if ($dns == "") {

		$dns = trim(_getHostName("", "8.8.4.4"));

		if ($dns == "") {

			$dnsavailable = 0;

		}

	}

	foreach ($arp_table as &$entry) {

		// Add dnsresolve

		if ($dnsavailable && !empty($entry['mac-address'])) {

			$dns = trim(_getHostName($entry['mac-address'],

			    $entry['ip-address']));

		} else {

			$dns="";

		}

		if (trim($dns)) {

			$entry['dnsresolve'] = "$dns";

		} else {

			$entry['dnsresolve'] = "Z_ ";

		}

		// Fix MAC address

		if (empty($entry['mac-address'])) {

			$mac = '(' . gettext("Incomplete") .')';

			$entry['mac-address'] = $mac;

		} else {

			$mac = trim($entry['mac-address']);

			$entry['mac-address'] = $mac;

			$mac_hi = strtoupper($mac[0] . $mac[1] .

			    $mac[3] . $mac[4] . $mac[6] .

			    $mac[7]);

			if (isset($mac_man[$mac_hi])) {

				$entry['mac-address'] .= ' <small>('.

				    $mac_man[$mac_hi] .

				    ')</small>';

			}

		}

		// Fix expiration

		$status = '';

		if (!empty($entry['expires'])) {

			$status = sprintf(gettext(

			    "Expires in %d seconds"),

			    $entry['expires']);

		} else if (!empty($entry['permanent'])) {

			$status = gettext("Permanent");

		}

		$entry['expires'] = $status;

		// Fix dnsresolve

		$entry['dnsresolve'] = trim(str_replace("Z_ ", "", $entry['dnsresolve']));

		// Fix interface

		$entry['interface'] = $hwif[$entry['interface']];

	}

	// Sort the data alpha first

	$arp_table = msort($arp_table, "dnsresolve");

	if ($json) {

		$jstr = json_encode($arp_table);

		$jstr = str_replace("mac-address", "mac", $jstr);

		$jstr = str_replace("ip-address", "ip", $jstr);

		return $jstr;

	} else {

		return $arp_table;

	}

}

?>