From ba40ee75f1565d2135c9de1b2e931c16c99eadb5 Mon Sep 17 00:00:00 2001
From: PiBa-NL <pba_2k3@yahoo.com>
Date: Mon, 23 May 2016 01:19:08 +0200
Subject: Diagnostics - DNS Lookup, also query for IPv6 addresses

---
 src/usr/local/www/diag_dns.php | 75 +++++++++++++++++++++++++++++++-----------
 1 file changed, 56 insertions(+), 19 deletions(-)

diff --git a/src/usr/local/www/diag_dns.php b/src/usr/local/www/diag_dns.php
index 18cc1bf..2ed0d07 100755
--- a/src/usr/local/www/diag_dns.php
+++ b/src/usr/local/www/diag_dns.php
@@ -64,7 +64,6 @@ $pgtitle = array(gettext("Diagnostics"), gettext("DNS Lookup"));
 require("guiconfig.inc");
 
 $host = trim($_REQUEST['host'], " \t\n\r\0\x0B[];\"'");
-$host_esc = escapeshellarg($host);
 
 /* If this section of config.xml has not been populated yet we need to set it up
 */
@@ -84,19 +83,54 @@ foreach ($a_aliases as $a) {
 	$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) {
-		$resolved = array();
-		exec("/usr/bin/drill {$host_esc} A | /usr/bin/grep {$host_esc} | /usr/bin/grep -v ';' | /usr/bin/awk '{ print $5 }'", $resolved);
+		$resolved = resolve_host_addresses($host);
 		$isfirst = true;
 		foreach ($resolved as $re) {
-			if ($re != "") {
+			if ($re['data'] != "") {
 				if (!$isfirst) {
 					$addresses .= " ";
 				}
-				$re = rtrim($re);
+				$re = rtrim($re['data']);
 				if (is_ipaddr($re)) {
 					$sn = is_ipaddrv6($re) ? '/128' : '/32';
 				} else {
@@ -167,8 +201,7 @@ if ($_POST) {
 			$type = "hostname";
 			$resolved = gethostbyname($host);
 			if ($resolved) {
-				$resolved = array();
-				exec("/usr/bin/drill {$host_esc} A | /usr/bin/grep {$host_esc} | /usr/bin/grep -v ';' | /usr/bin/awk '{ print $5 }'", $resolved);
+				$resolved = resolve_host_addresses($host);
 			}
 			$hostname = $host;
 			if ($host != $resolved) {
@@ -265,18 +298,22 @@ if (!$input_errors && $type) {
 <div class="panel panel-default">
 	<div class="panel-heading"><h2 class="panel-title"><?=gettext('Results')?></h2></div>
 	<div class="panel-body">
-		<ul class="list-group">
-<?php
-		foreach ((array)$resolved as $hostitem) {
-?>
-			<li class="list-group-item"><?=$hostitem?></li>
-<?php
-			if ($hostitem != "") {
-				$found++;
-			}
-		}
-?>
-		</ul>
+		
+		<table class="table">
+		<thead>
+			<tr>
+				<th><?=gettext('Result')?></th>
+				<th><?=gettext('Record type')?></th>
+			</tr>
+		</thead>
+		<tbody>
+<?php foreach ((array)$resolved as $hostitem):?>
+		<tr>
+			<td><?=$hostitem['data']?></td><td><?=$hostitem['type']?></td>
+		</tr>
+<?php endforeach; ?>
+		</tbody>
+		</table>
 	</div>
 </div>
 <?php endif; ?>
-- 
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