Speed BrandListener up

src/de/steamwar/bungeecore/listeners/BrandListener.java

@@ -28,15 +28,30 @@ import net.md_5.bungee.api.event.PluginMessageEvent;
 import net.md_5.bungee.event.EventHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+
 public class BrandListener extends BasicListener {
 
+    private static boolean isLocalHost(InetAddress addr) {
+        if (addr.isAnyLocalAddress() || addr.isLoopbackAddress()) {
+            return true;
+        }
+        try {
+            return NetworkInterface.getByInetAddress(addr) != null;
+        } catch (SocketException e) {
+            return false;
+        }
+    }
+
     @EventHandler
     public void onServerSwitch(PluginMessageEvent event) {
         if(!event.getTag().equals("minecraft:brand") && !event.getTag().equals("MC|Brand")) {
             return;
         }
 
-        if(event.getReceiver().getAddress().getHostName().contains("localhost")) {
+        if (isLocalHost(event.getReceiver().getAddress().getAddress())) {
             return;
         }