pfSense

<?php

/*

 * diag_arp.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-diagnostics-arptable

##|*NAME=Diagnostics: ARP Table

##|*DESCR=Allow access to the 'Diagnostics: ARP Table' page.

##|*MATCH=diag_arp.php*

##|-PRIV

@ini_set('zlib.output_compression', 0);

@ini_set('implicit_flush', 1);

require_once("guiconfig.inc");

// delete arp entry

if (isset($_POST['deleteentry'])) {

	$ip = $_POST['deleteentry'];

	if (is_ipaddrv4($ip)) {

		$ret = mwexec("arp -d " . $_POST['deleteentry'], true);

	} else {

		$ret = 1;

	}

	if ($ret) {

		$savemsg = sprintf(gettext("%s is not a valid IPv4 address or could not be deleted."), $ip);

		$savemsgtype = 'alert-warning';

	} else {

		$savemsg = sprintf(gettext("The ARP cache entry for %s has been deleted."), $ip);

		$savemsgtype = 'success';

	}

}

function leasecmp($a, $b) {

	return strcmp($a[$_REQUEST['order']], $b[$_REQUEST['order']]);

}

function adjust_gmt($dt) {

	$ts = strtotime($dt . " GMT");

	return strftime("%Y/%m/%d %H:%M:%S", $ts);

}

function remove_duplicate($array, $field) {

	foreach ($array as $sub) {

		$cmp[] = $sub[$field];

	}

	$unique = array_unique($cmp);

	foreach ($unique as $k => $rien) {

		$new[] = $array[$k];

	}

	return $new;

}

// Define path to AWK

$awk = "/usr/bin/awk";

// Read in leases file

$leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd.leases";

/* this pattern sticks comments into a single array item */

$cleanpattern = "'{ gsub(\"#.*\", \"\");} { gsub(\";\", \"\"); print;}'";

/* We then split the leases file by } */

$splitpattern = "'BEGIN { RS=\"}\";} {for (i=1; i<=NF; i++) printf \"%s \", \$i; printf \"}\\n\";}'";

/* get arp database into local space */

exec("/usr/sbin/arp -na --libxo json",$arp_output);

$arp_db = json_decode(implode("",$arp_output),true)["arp"]["arp-cache"];

/* rebuild dhcpd file into an associated array */

$dhcpd_file = file_get_contents($leasesfile);

preg_match_all('/^(?:[\s]+?)?lease[\s]+(?:.|\n)+?}/m',$dhcpd_file,$out);

$leases = array();

foreach($out[0] as $entry){

	preg_match('/^(?:[\s]+?)?lease[\s]+(.+)[\s]+{/m',$entry,$ip);

	preg_match('/^(?:[\s]+?)?hardware[\s]+ethernet[\s]+((?:[0-9a-f]{2}[:-]){5}[0-9a-f]{2});/m',$entry,$mac);

	preg_match('/^(?:[\s]+?)?client-hostname "((.+))";$/m',$entry,$hostname);

	$lease['ip'] = $ip[1];

	$lease['mac'] = $mac[1];

	$lease['hostname'] = $hostname[1];

	$leases[] = $lease;

}

if (count($leases) > 0) {

	$leases = remove_duplicate($leases, "ip");

}

// Put this in an easy to use form

$dhcpmac = array();

$dhcpip = array();

foreach ($leases as $value) {

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

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

}

$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;

	}

}

$data = array();

foreach ($arp_db as $elements) {

        $arpent = array();

        $arpent['ip'] = $elements['ip-address'];

        $arpent['mac'] = $elements['mac-address'];

	$arpent['interface'] = $elements['interface'];

	if($elements['expires']){

		$arpent['status'] = "Expires in ".$elements['expires']." seconds";

	} elseif ($elements['permanent']){

		$arpent['status'] = "Permanent";

	}

        $arpent['linktype'] = $elements['type'];

        $data[] = $arpent;

}

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 "";

}

$pgtitle = array(gettext("Diagnostics"), gettext("ARP Table"));

include("head.inc");

// Handle save msg if defined

if ($savemsg) {

	print_info_box(htmlentities($savemsg), $savemsgtype);

}

?>

<!-- On modern hardware the table will load so fast you may never see this! -->

<div id="loading">

	<?= gettext(" Loading, please wait...")?>

</div>

<?php

// Flush buffers out to client so that they see Loading, please wait....

for ($i = 0; $i < ob_get_level(); $i++) {

	ob_end_flush();

}

ob_implicit_flush(1);

// 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 ($data as &$entry) {

	if ($dnsavailable) {

		$dns = trim(_getHostName($entry['mac'], $entry['ip']));

	} else {

		$dns="";

	}

	if (trim($dns)) {

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

	} else {

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

	}

}

unset($entry);

// Sort the data alpha first

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

// Load MAC-Manufacturer table

$mac_man = load_mac_manufacturer_table();

?>

<div class="panel panel-default">

	<div class="panel-heading"><h2 class="panel-title"><?=gettext('ARP Table')?></h2></div>

	<div class="panel-body">

<div class="table-responsive">

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

		<thead>

			<tr>

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

				<th><?= gettext("IP address")?></th>

				<th><?= gettext("MAC address")?></th>

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

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

				<th><?= gettext("Link Type")?></th>

				<th data-sortable="false"><?=gettext("Actions")?></th>

			</tr>

		</thead>

		<tbody>

<?php

		foreach ($data as $entry): ?>

			<tr>

				<td><?=$hwif[$entry['interface']]?></td>

				<td><?=$entry['ip']?></td>

				<td>

					<?=trim($entry['mac'])?>

				<?php

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

					$mac_hi = strtoupper($mac[0] . $mac[1] . $mac[3] . $mac[4] . $mac[6] . $mac[7]);

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

						print '<small>('. $mac_man[$mac_hi] .')</small>';

					}

	?>

				</td>

				<td><?=trim(str_replace("Z_ ", "", $entry['dnsresolve']))?></td>

				<td><?=ucfirst($entry['status'])?></td>

				<td><?=$entry['linktype']?></td>

				<td>

					<a class="fa fa-trash" title="<?=gettext('Delete arp cache entry')?>"	href="diag_arp.php?deleteentry=<?=$entry['ip']?>" usepost></a>

				</td>

			</tr>

		<?php endforeach?>

		</tbody>

	</table>

</div>

	</div>

</div>

<script type="text/javascript">

//<![CDATA[

// Clear the "loading" div once the page has loaded"

events.push(function() {

	$('#loading').empty();

});

//]]>

</script>

<div class="infoblock blockopen">

<?php

print_info_box(sprintf(gettext('Local IPv6 peers use %1$sNDP%2$s instead of ARP.'), '<a href="diag_ndp.php">', '</a>') . '<br />' .

   '<br />' . gettext('Permanent ARP entries are shown for local interfaces or static ARP entries.') .

   '<br />' . gettext('Normal dynamic ARP entries show a countdown timer until they will expire and then be re-checked.') .

   '<br />' . gettext('Incomplete ARP entries indicate that the target host has not yet replied to an ARP request.'), 'info', false);

?>

</div>

<?php

include("foot.inc");

?>