Added a simple way to identify Geyser players.

Keep in mind that using this to identify players is less secure than using Floodgate

connector/src/main/java/org/geysermc/connector/network/translators/TranslatorsInit.java

@@ -95,6 +95,7 @@ public class TranslatorsInit {
 
     public static void start() {
         Registry.registerJava(ServerJoinGamePacket.class, new JavaJoinGameTranslator());
+        Registry.registerJava(ServerPluginMessagePacket.class, new JavaPluginMessageTranslator());
         Registry.registerJava(ServerChatPacket.class, new JavaChatTranslator());
         Registry.registerJava(ServerTitlePacket.class, new JavaTitleTranslator());
         Registry.registerJava(ServerUpdateTimePacket.class, new JavaUpdateTimeTranslator());

connector/src/main/java/org/geysermc/connector/network/translators/java/JavaPluginMessageTranslator.java

@@ -0,0 +1,18 @@
+package org.geysermc.connector.network.translators.java;
+
+import com.github.steveice10.mc.protocol.packet.ingame.client.ClientPluginMessagePacket;
+import com.github.steveice10.mc.protocol.packet.ingame.server.ServerPluginMessagePacket;
+import org.geysermc.connector.GeyserConnector;
+import org.geysermc.connector.network.session.GeyserSession;
+import org.geysermc.connector.network.translators.PacketTranslator;
+
+public class JavaPluginMessageTranslator extends PacketTranslator<ServerPluginMessagePacket> {
+    @Override
+    public void translate(ServerPluginMessagePacket packet, GeyserSession session) {
+        if (packet.getChannel().equals("minecraft:brand")) {
+            session.getDownstream().getSession().send(
+                    new ClientPluginMessagePacket(packet.getChannel(), GeyserConnector.NAME.getBytes())
+            );
+        }
+    }
+}