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diag_dns.php
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diag_dns.php
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<?php
/*
* Copyright (C) 2016 Deciso B.V.
* Copyright (C) 2009 Jim Pingle <jimp@pfsense.org>
* 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.
*/
require_once("guiconfig.inc");
$resolved = array();
$dns_speeds = array();
if (!empty($_REQUEST['host'])) {
$input_errors = array();
$host = trim($_REQUEST['host'], " \t\n\r\0\x0B[];\"'");
$host_esc = escapeshellarg($host);
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_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");
}
$dns_speeds[] = array('dns_server' => $dns_server, 'query_time' => $query_time);
}
}
$ipaddr = "";
if (count($input_errors) == 0) {
if (is_ipaddr($host)) {
$resolved[] = " " . gethostbyaddr($host); // add a space to provide an empty type field
$ipaddr = $host;
} elseif (is_hostname($host)) {
exec("/usr/bin/drill {$host_esc} A | /usr/bin/grep 'IN' | /usr/bin/grep -v ';' | /usr/bin/awk '{ print $4 \" \" $5 }'", $resolved);
$ipaddr = explode(" ", $resolved[count($resolved)-1])[1];
}
}
}
include("head.inc"); ?>
<body>
<?php include("fbegin.inc"); ?>
<section class="page-content-main">
<div class="container-fluid">
<div class="row">
<form method="post" name="iform" id="iform">
<section class="col-xs-12">
<div class="content-box">
<?php if (isset($input_errors) && count($input_errors) > 0) print_input_errors($input_errors); ?>
<header class="content-box-head container-fluid">
<h3><?=gettext("Resolve DNS hostname or IP");?></h3>
</header>
<div class="table-responsive">
<table class="table table-striped">
<tbody>
<tr>
<td style="width: 22%"><?=gettext("Hostname or IP");?></td>
<td>
<input name="host" type="text" value="<?=htmlspecialchars($host);?>" />
</td>
</tr>
<?php
if (count($resolved) > 0):?>
<tr>
<td><?=gettext("Response");?></td>
<td>
<table class="table table-striped table-condensed">
<tr>
<th><?=gettext("Type");?></th>
<th><?=gettext("Address");?></th>
</tr>
<?php
foreach($resolved as $hostitem):?>
<tr>
<td><?=explode(' ',$hostitem)[0];?></td>
<td><?=explode(' ',$hostitem)[1];?></td>
</tr>
<?php
endforeach;?>
</table>
</td>
</tr>
<tr>
<td><?=gettext("Resolution time per server");?></td>
<td colspan="2">
<table class="table table-striped table-condensed">
<tr>
<th><?=gettext("Server");?></th>
<th><?=gettext("Query time");?></th>
</tr>
<?php
foreach($dns_speeds as $qt): ?>
<tr>
<td><?=$qt['dns_server']?></td>
<td><?=$qt['query_time']?></td>
</tr>
<?php
endforeach; ?>
</table>
</td>
</tr>
<?php
endif;?>
</tbody>
<tfoot>
<tr>
<td></td>
<td>
<input type="submit" class="btn btn-primary btn-fixed" value="<?= html_safe(gettext('DNS Lookup')) ?>" />
</td>
</tr>
</tfoot>
</table>
</div>
</div>
</section>
</form>
</div>
</div>
</section>
<?php include("foot.inc"); ?>