[Modify] Use it

websocket-sharp/Server/WebSocketServer.cs

@@ -630,12 +630,9 @@ namespace WebSocketSharp.Server
         return;
       }
 
-      if (_dnsStyle) {
+      if (!checkHostName (uri.DnsSafeHost)) {
-        var hostname = uri.DnsSafeHost;
+        context.Close (HttpStatusCode.NotFound);
-        if (Uri.CheckHostName (hostname) == UriHostNameType.Dns && hostname != _hostname) {
+        return;
-          context.Close (HttpStatusCode.NotFound);
-          return;
-        }
       }
 
       WebSocketServiceHost host;