Fix diag_dns ipaddr set to use in IP WHOIS and IP Info

- Do not call resolve_host_addresses() when hostname cannot be resolved
  by gethostbyname(). The old check was considering gethostbyname would
  return NULL in this case but it returns a string with the hostname
  passed on parameter
- Since resolve_host_addresses() always return an array, look for the
  first A record to set $ipaddr, which will be used later to link with
  IP WHOIS and IP Info

Based on Pull Request #3100 submitted by @NewEraCracker

1 files changed, 7 insertions, 4 deletions

diff --git a/src/usr/local/www/diag_dns.php b/src/usr/local/www/diag_dns.php
index 4447787..bb6ffb5 100644
--- a/src/usr/local/www/diag_dns.php
+++ b/src/usr/local/www/diag_dns.php
@@ -200,11 +200,14 @@ if ($_POST) {
 		} elseif (is_hostname($host)) {
 			$type = "hostname";
 			$resolved = gethostbyname($host);
-			if ($resolved) {
-				$resolved = resolve_host_addresses($host);
-			}
 			if ($host != $resolved) {
-				$ipaddr = $resolved[0];
+				$resolved = resolve_host_addresses($host);
+				foreach ($resolved as $item) {
+					if ($item['type'] == 'A') {
+						$ipaddr = $item['data'];
+						break;
+					}
+				}
 			}
 		}