pfSense

<?php

/*

 * diag_dns.php

 *

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

 * Copyright (c) 2004-2016 Rubicon Communications, LLC (Netgate)

 * 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-dns

##|*NAME=Diagnostics: DNS Lookup

##|*DESCR=Allow access to the 'Diagnostics: DNS Lookup' page.

##|*MATCH=diag_dns.php*

##|-PRIV

$pgtitle = array(gettext("Diagnostics"), gettext("DNS Lookup"));

require_once("guiconfig.inc");

$host = trim($_REQUEST['host'], " \t\n\r\0\x0B[];\"'");

/* If this section of config.xml has not been populated yet we need to set it up

*/

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

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

}

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

$aliasname = substr(str_replace(array(".", "-"), "_", $host), 0, 31);

$alias_exists = false;

$counter = 0;

foreach ($a_aliases as $a) {

	if ($a['name'] == $aliasname) {

		$alias_exists = true;

		$id = $counter;

	}

	$counter++;

}

function resolve_host_addresses($host) {

	$recordtypes = array(DNS_A, DNS_AAAA, DNS_CNAME);

	$dnsresult = array();

	$resolved = array();

	$errreporting = error_reporting();

	error_reporting($errreporting & ~E_WARNING);// dns_get_record throws a warning if nothing is resolved..

	foreach ($recordtypes as $recordtype) {

		$tmp = dns_get_record($host, $recordtype);

		if (is_array($tmp)) {

			$dnsresult = array_merge($dnsresult, $tmp);

		}

	}

	error_reporting($errreporting);// restore original php warning/error settings.

	foreach ($dnsresult as $item) {

		$newitem = array();

		$newitem['type'] = $item['type'];

		switch ($item['type']) {

			case 'CNAME':

				$newitem['data'] = $item['target'];

				$resolved[] = $newitem;

				break;

			case 'A':

				$newitem['data'] = $item['ip'];

				$resolved[] = $newitem;

				break;

			case 'AAAA':

				$newitem['data'] = $item['ipv6'];

				$resolved[] = $newitem;

				break;

		}

	}

	return $resolved;

}

if (isset($_POST['create_alias']) && (is_hostname($host) || is_ipaddr($host))) {

	$resolved = gethostbyname($host);

	$type = "hostname";

	if ($resolved) {

		$resolved = resolve_host_addresses($host);

		$isfirst = true;

		foreach ($resolved as $re) {

			if ($re['data'] != "") {

				if (!$isfirst) {

					$addresses .= " ";

				}

				$re = rtrim($re['data']);

				if (is_ipaddr($re)) {

					$sn = is_ipaddrv6($re) ? '/128' : '/32';

				} else {

					// The name was a CNAME and resolved to another name, rather than an address.

					// In this case the alias entry will have a FQDN, so do not put a CIDR after it.

					$sn = "";

				}

				$addresses .= $re . $sn;

				$isfirst = false;

			}

		}

		$newalias = array();

		$newalias['name'] = $aliasname;

		$newalias['type'] = "network";

		$newalias['address'] = $addresses;

		$newalias['descr'] = gettext("Created from Diagnostics-> DNS Lookup");

		if ($alias_exists) {

			$a_aliases[$id] = $newalias;

		} else {

			$a_aliases[] = $newalias;

		}

		write_config(gettext("Created an alias from Diagnostics - DNS Lookup page."));

		write_config();

		$createdalias = true;

	}

}

if ($_POST) {

	unset($input_errors);

	$reqdfields = explode(" ", "host");

	$reqdfieldsn = explode(",", "Host");

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

	if (!is_hostname($host) && !is_ipaddr($host)) {

		$input_errors[] = gettext("Host must be a valid hostname or IP address.");

	} else {

		// Test resolution speed of each DNS server.

		$dns_speeds = array();

		$dns_servers = array();

		exec("/usr/bin/grep nameserver /etc/resolv.conf | /usr/bin/cut -f2 -d' '", $dns_servers);

		foreach ($dns_servers as $dns_server) {

			$query_time = exec("/usr/bin/drill {$host_esc} " . escapeshellarg("@" . trim($dns_server)) . " | /usr/bin/grep Query | /usr/bin/cut -d':' -f2");

			if ($query_time == "") {

				$query_time = gettext("No response");

			}

			$new_qt = array();

			$new_qt['dns_server'] = $dns_server;

			$new_qt['query_time'] = $query_time;

			$dns_speeds[] = $new_qt;

			unset($new_qt);

		}

	}

	$type = "unknown";

	$resolved = array();

	$ipaddr = "";

	if (!$input_errors) {

		if (is_ipaddr($host)) {

			$type = "ip";

			$resolvedptr = gethostbyaddr($host);

			$ipaddr = $host;

			if ($host != $resolvedptr) {

				$tmpresolved = array();

				$tmpresolved['type'] = "PTR";

				$tmpresolved['data'] = $resolvedptr;

				$resolved[] = $tmpresolved;

			}

		} elseif (is_hostname($host)) {

			$type = "hostname";

			$ipaddr = gethostbyname($host);

			$resolved = resolve_host_addresses($host);

		}

	}

}

if ($_POST['host'] && $_POST['dialog_output']) {

	$host = (isset($resolvedptr) ? $resolvedptr : $host);

	display_host_results ($ipaddr, $host, $dns_speeds);

	exit;

}

function display_host_results ($address, $hostname, $dns_speeds) {

	$map_lengths = function($element) { return strlen($element[0]); };

	echo gettext("IP Address") . ": " . htmlspecialchars($address) . " \n";

	echo gettext("Host Name") . ": " . htmlspecialchars($hostname) .  " \n";

	echo "\n";

	$text_table = array();

	$text_table[] = array(gettext("Server"), gettext("Query Time"));

	if (is_array($dns_speeds)) {

		foreach ($dns_speeds as $qt) {

			$text_table[] = array(trim($qt['dns_server']), trim($qt['query_time']));

		}

	}

	$col0_padlength = max(array_map($map_lengths, $text_table)) + 4;

	foreach ($text_table as $text_row) {

		echo str_pad($text_row[0], $col0_padlength) . $text_row[1] . "\n";

	}

}

include("head.inc");

/* Display any error messages resulting from user input */

if ($input_errors) {

	print_input_errors($input_errors);

} else if (!$resolved && $type) {

	print_info_box(sprintf(gettext('Host "%s" could not be resolved.'), $host), 'warning', false);

}

if ($createdalias) {

	if ($alias_exists) {

		print_info_box(gettext("Alias was updated successfully."), 'success');

	} else {

		print_info_box(gettext("Alias was created successfully."), 'success');

	}

}

$form = new Form(false);

$section = new Form_Section('DNS Lookup');

$section->addInput(new Form_Input(

	'host',

	'*Hostname',

	'text',

	$host,

	['placeholder' => 'Hostname to look up.']

));

$form->add($section);

$form->addGlobal(new Form_Button(

        'Submit',

        'Lookup',

        null,

        'fa-search'

))->addClass('btn-primary');

if (!empty($resolved)) {

	if ($alias_exists) {

		$button_text = gettext("Update alias");

	} else {

		$button_text = gettext("Add alias");

	}

	$form->addGlobal(new Form_Button(

		'create_alias',

		$button_text,

		null,

		'fa-plus'

	))->removeClass('btn-primary')->addClass('btn-success');

}

print $form;

if (!$input_errors && $type) {

	if ($resolved):

?>

<div class="panel panel-default">

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

	<div class="panel-body">

		<table class="table">

		<thead>

			<tr>

				<th><?=gettext('Result')?></th>

				<th><?=gettext('Record type')?></th>

			</tr>

		</thead>

		<tbody>

<?php foreach ((array)$resolved as $hostitem):?>

		<tr>

			<td><?=htmlspecialchars($hostitem['data'])?></td><td><?=htmlspecialchars($hostitem['type'])?></td>

		</tr>

<?php endforeach; ?>

		</tbody>

		</table>

	</div>

</div>

<?php endif; ?>

<!-- Second table displays the server resolution times -->

<div class="panel panel-default">

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

	<div class="panel-body">

		<table class="table">

		<thead>

			<tr>

				<th><?=gettext('Name server')?></th>

				<th><?=gettext('Query time')?></th>

			</tr>

		</thead>

		<tbody>

<?php foreach ((array)$dns_speeds as $qt):?>

		<tr>

			<td><?=htmlspecialchars($qt['dns_server'])?></td><td><?=htmlspecialchars($qt['query_time'])?></td>

		</tr>

<?php endforeach; ?>

		</tbody>

		</table>

	</div>

</div>

<!-- Third table displays "More information" -->

<div class="panel panel-default">

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

	<div class="panel-body">

		<ul class="list-group">

			<li class="list-group-item"><a href="/diag_ping.php?host=<?=htmlspecialchars($host)?>&amp;count=3"><?=gettext("Ping")?></a></li>

			<li class="list-group-item"><a href="/diag_traceroute.php?host=<?=htmlspecialchars($host)?>&amp;ttl=18"><?=gettext("Traceroute")?></a></li>

		</ul>

		<h5><?=gettext("NOTE: The following links are to external services, so their reliability cannot be guaranteed.");?></h5>

		<ul class="list-group">

			<li class="list-group-item"><a target="_blank" href="http://private.dnsstuff.com/tools/whois.ch?ip=<?=$ipaddr;?>"><?=gettext("IP WHOIS @ DNS Stuff");?></a></li>

			<li class="list-group-item"><a target="_blank" href="http://private.dnsstuff.com/tools/ipall.ch?ip=<?=$ipaddr;?>"><?=gettext("IP Info @ DNS Stuff");?></a></li>

		</ul>

	</div>

</div>

<?php

}

include("foot.inc");