From c57f60644d4dc5448164d3794c2a05296b5c9381 Mon Sep 17 00:00:00 2001
From: Tony Murray <murraytony@gmail.com>
Date: Fri, 17 Aug 2018 12:17:45 -0500
Subject: [PATCH] Add a check for a failed dns query in get_astext() (#9020)

DO NOT DELETE THIS TEXT

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---
 includes/functions.php | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/includes/functions.php b/includes/functions.php
index 73cc107232..2bd660396b 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -968,21 +968,25 @@ function snmp2ipv6($ipv6_snmp)
 
 function get_astext($asn)
 {
-    global $config,$cache;
+    global $cache;
 
-    if (isset($config['astext'][$asn])) {
-        return $config['astext'][$asn];
-    } else {
-        if (isset($cache['astext'][$asn])) {
-            return $cache['astext'][$asn];
-        } else {
-            $result = dns_get_record("AS$asn.asn.cymru.com", DNS_TXT);
-            $txt = explode('|', $result[0]['txt']);
-            $result = trim(str_replace('"', '', $txt[4]));
-            $cache['astext'][$asn] = $result;
-            return $result;
-        }
+    if (Config::has("astext.$asn")) {
+        return Config::get("astext.$asn");
     }
+
+    if (isset($cache['astext'][$asn])) {
+        return $cache['astext'][$asn];
+    }
+
+    $result = dns_get_record("AS$asn.asn.cymru.com", DNS_TXT);
+    if (!empty($result[0]['txt'])) {
+        $txt = explode('|', $result[0]['txt']);
+        $result = trim($txt[4], ' "');
+        $cache['astext'][$asn] = $result;
+        return $result;
+    }
+
+    return '';
 }
 
 /**