diff --git a/src/Xash3D/Master.php b/src/Xash3D/Master.php
index 8f1dc61..5ea743e 100644
--- a/src/Xash3D/Master.php
+++ b/src/Xash3D/Master.php
@@ -4,80 +4,124 @@ declare(strict_types=1);
 
 namespace Yggverse\Hl\Xash3D;
 
+enum Family: int {
+    case IPv4 = 4;
+    case IPv6 = 16;
+}
+
+enum Region: string {
+    case USEastCoast  = "0x00";
+    case USWestCoast  = "0x01";
+    case SouthAmerica = "0x02";
+    case Europe       = "0x03";
+    case Asia         = "0x04";
+    case Australia    = "0x05";
+    case MiddleEast   = "0x06";
+    case Africa       = "0x07";
+    case World        = "0xff";
+}
+
+enum Game: string {
+    case Valve = "valve";
+}
+
 class Master
 {
-    private $_socket;
-    private $_errors = [];
+    private string $_host;
+    private int    $_port;
+    private int    $_timeout;
+
+    private array  $_errors = [];
 
     public function __construct(
         string $host,
-        int    $port,
+        int    $port    = 27010,
         int    $timeout = 5
     )
     {
-        $this->_socket = fsockopen(
-            "udp://{$host}",
-            $port,
+        $this->_host    = $host;
+        $this->_port    = $port;
+        $this->_timeout = $timeout;
+    }
+
+    private function _fclose(
+        mixed $socket
+    )
+    {
+        if (true === is_resource($socket))
+        {
+            fclose(
+                $socket
+            );
+        }
+    }
+
+    // Legacy protocol implementation does not support mixed address families
+    // in the binary master socket response, use separated method for IPv4 servers.
+    public function getServers(
+        int    $limit   = 100,
+        string $host    = "0.0.0.0",
+        int    $port    = 0,
+        Game   $game    = Game::Valve,
+        Region $region  = Region::World
+    ): ?array
+    {
+        $family = filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) ? Family::IPv4 : Family::IPv6;
+
+        // Init connection
+        $socket = fsockopen(
+            "udp://{$this->_host}",
+            $this->_port,
             $code,
             $message,
-            $timeout
+            $this->_timeout
         );
 
-        if (is_resource($this->_socket))
+        $master = "{$this->_host}:{$this->_port}";
+
+        // Is connected
+        if (true === is_resource($socket))
         {
             stream_set_timeout(
-                $this->_socket,
-                $timeout
+                $socket,
+                $this->_timeout
             );
         }
 
         else
         {
             $this->_errors[] = sprintf(
-                _('Connection error: %s'),
+                _("Connection error for $master: %s"),
                 $message
             );
-        }
-    }
 
-    public function __destruct()
-    {
-        if (true === is_resource($this->_socket))
-        {
-            fclose(
-                $this->_socket
+            $this->_fclose(
+                $socket
             );
-        }
-    }
-
-    public function getServersIPv6(
-        int    $limit   = 100,
-        string $region  = "\xFF",
-        string $host    = "0.0.0.0:0",
-        int    $port    = 0,
-        string $gamedir = "valve"
-    ): ?array
-    {
-        // Is connected
-        if (false === is_resource($this->_socket))
-        {
-            $this->_errors[] = _('Socket connection error');
 
             return null;
         }
 
         // Filter query
-        if (false === fwrite($this->_socket, "1{$region}{$host}:{$port}\0\gamedir\t{$gamedir}\0"))
+        if (false === fwrite($socket, "1{$region->value}{$host}:{$port}\0\\gamedir\\{$game->value}\0"))
         {
-            $this->_errors[] = _('Could not send socket query');
+            $this->_errors[] = _("Could not send socket query for $master");
+
+            $this->_fclose(
+                $socket
+            );
 
             return null;
         }
 
         // Skip header
-        if (false === fread($this->_socket, 6))
+        if (false === fread($socket, 6))
         {
-            $this->_errors[] = _('Could not init packet header');
+            $this->_errors[] = _("Could not init packet header for $master");
+
+            $this->_fclose(
+                $socket
+            );
 
             return null;
         }
@@ -87,62 +131,59 @@ class Master
 
         for ($i = 0; $i < $limit; $i++)
         {
-            // Get host
-            if (false === $host = fread($this->_socket, 16))
+            // Get host bytes
+            if (false === $host = fread($socket, $family->value))
+            {
+                $this->_errors[] = _("Invalid `host` fragment in packet at $i for $master");
+                break;
+            }
+
+            // End of packet
+            if (true === str_ends_with(bin2hex($host), bin2hex("\0\0\0\0\0\0")))
             {
                 break;
             }
 
-            // Is end of packet
-            if (true === str_starts_with($host, (string) 0))
-            {
-                break;
-            }
-
-            // Skip invalid host value
+            // Get host string
             if (false === $host = inet_ntop($host))
             {
-                // Shift port bytes
-                fread($this->_socket, 2);
-
-                continue;
+                $this->_errors[] = _("Invalid `host` value in packet at $i for $master");
+                break;
             }
 
-            // Decode first byte for port
-            if (false === $byte1 = fread($this->_socket, 1))
+            // Get port bytes
+            if (false === $p = fread($socket, 2))
             {
-                // Shift port byte
-                fread($this->_socket, 1);
-
-                continue;
+                $this->_errors[] = _("Invalid `port` fragment in packet at $i for $master");
+                break;
             }
 
-            // Decode second byte for port
-            if (false === $byte2 = fread($this->_socket, 1))
+            // Get port value
+            if (false === $p = unpack('nport', $p))
             {
-                continue;
+                $this->_errors[] = _("Invalid `port` value in packet at $i for $master");
+                break;
             }
 
-            // Calculate port value
-            $port = ord($byte1) * 256 + ord($byte2);
-
-            // Validate IPv6 result
-            if (
-                false !== strpos($host, '.') || // filter_var not always works with mixed IPv6
-                false === filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) ||
-                false === filter_var($port, FILTER_VALIDATE_INT)
-            )
+            // Validate result
+            if (false === filter_var($host, FILTER_VALIDATE_IP, $family == Family::IPv6 ? FILTER_FLAG_IPV6
+                                                                                        : FILTER_FLAG_IPV4) || empty($p['port']))
             {
-                continue;
+                $this->_errors[] = _("Invalid socket address in packet at $i for $master");
+                break;
             }
 
-            $servers["[{$host}]:{$port}"] = // keep unique
+            $servers["{$host}{$p['port']}"] = // keep unique
             [
                 'host' => $host,
-                'port' => $port
+                'port' => $p['port']
             ];
         }
 
+        $this->_fclose(
+            $socket
+        );
+
         return $servers;
     }