suppress errors of dns_get_record but retry to maybe work around temporary problems

1 files changed, 7 insertions, 4 deletions

diff --git a/it.class b/it.class
index e634d44..5797e75 100644
--- a/it.class
+++ b/it.class
@@ -443,10 +443,13 @@ static function is_private_ip($host)
 	else
 	{
 		$ips = [];
-		foreach (dns_get_record($host, DNS_A) as $record)
-			$ips[] = $record['ip'];
-		foreach (dns_get_record($host, DNS_AAAA) as $record)
-			$ips[] = $record['ipv6'];
+		foreach ([DNS_A, DNS_AAAA] as $type)
+		{
+			$records = false;
+			for ($try = 0; $try < 3 && $records === false; $try++)
+				foreach ((array)($records = @dns_get_record($host, $type)) as $record)
+					$ips[] = $record[$type == DNS_A ? 'ip' : 'ipv6'];
+		}
 	}
 
 	foreach ($ips as $ip)