src/de/steamwar/bungeecore/BungeeCore.java

@@ -85,6 +85,7 @@ public class BungeeCore extends Plugin {
         new WorldDownloader();
         new BrandListener();
         new Fabric();
+        new SubserverProtocolFixer();
 
         new Node.LocalNode();
         //new Node.RemoteNode("lx");

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

@@ -0,0 +1,63 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2020  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bungeecore.listeners;
+
+import io.github.waterfallmc.waterfall.utils.UUIDUtils;
+import net.md_5.bungee.BungeeCord;
+import net.md_5.bungee.api.event.LoginEvent;
+import net.md_5.bungee.connection.InitialHandler;
+import net.md_5.bungee.connection.LoginResult;
+import net.md_5.bungee.event.EventHandler;
+import net.md_5.bungee.util.AddressUtil;
+
+import java.lang.reflect.Field;
+import java.net.InetSocketAddress;
+
+public class SubserverProtocolFixer extends BasicListener {
+
+    private final InetSocketAddress inetSocketAddress = new InetSocketAddress("127.127.127.127", 25565);
+
+    private Field field;
+
+    {
+        try {
+            field = InitialHandler.class.getDeclaredField("extraDataInHandshake");
+            field.setAccessible(true);
+        } catch (Exception e) {
+            BungeeCord.getInstance().stop();
+        }
+    }
+
+    @EventHandler
+    public void loginEvent(LoginEvent e) {
+        System.out.println(e);
+        InitialHandler initialHandler = ((InitialHandler) e.getConnection());
+        LoginResult.Property[] properties = initialHandler.getLoginProfile().getProperties();
+        try {
+            String extraData = "\00" + AddressUtil.sanitizeAddress(inetSocketAddress) + "\00" + UUIDUtils.undash(initialHandler.getUniqueId().toString());
+            if (properties.length > 0) {
+                extraData += "\00" + BungeeCord.getInstance().gson.toJson(properties);
+            }
+            field.set(initialHandler, extraData);
+        } catch (Exception ex) {
+            BungeeCord.getInstance().stop();
+        }
+    }
+}

src/de/steamwar/messages/BungeeCore.properties

@@ -467,6 +467,7 @@ TEAM_SERVER_USAGE=§8/§7team server §8[§eIP/Address§8] §8(§7Port§8) §8-
 TEAM_SERVER_SET=§7Du hast die Teamserveradresse geändert§8!
 TEAM_SERVER_PORT_INVALID=§cDer Port muss eine Zahl sein.
 TEAM_NO_ADDRESS=§cTeamserveradresse nicht gesetzt.
+TEAM_TP_NO_TEAM=§cUnbekanntes Team.
 
 #TpCommand
 TP_USAGE=§8/§7tp §8[§eSpieler§8]