#2546: reducedDebugInfo state not updating when changing servers

protocol/src/main/java/net/md_5/bungee/protocol/AbstractPacketHandler.java

@@ -20,6 +20,7 @@ import net.md_5.bungee.protocol.packet.Kick;
 import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.Handshake;
 import net.md_5.bungee.protocol.packet.EncryptionResponse;
+import net.md_5.bungee.protocol.packet.EntityStatus;
 import net.md_5.bungee.protocol.packet.LegacyHandshake;
 import net.md_5.bungee.protocol.packet.LegacyPing;
 import net.md_5.bungee.protocol.packet.LoginPayloadRequest;
@@ -158,4 +159,8 @@ public abstract class AbstractPacketHandler
     public void handle(LoginPayloadResponse response) throws Exception
     {
     }
+
+    public void handle(EntityStatus status) throws Exception
+    {
+    }
 }

protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java

@@ -16,6 +16,7 @@ import net.md_5.bungee.protocol.packet.Chat;
 import net.md_5.bungee.protocol.packet.ClientSettings;
 import net.md_5.bungee.protocol.packet.EncryptionRequest;
 import net.md_5.bungee.protocol.packet.EncryptionResponse;
+import net.md_5.bungee.protocol.packet.EntityStatus;
 import net.md_5.bungee.protocol.packet.Handshake;
 import net.md_5.bungee.protocol.packet.KeepAlive;
 import net.md_5.bungee.protocol.packet.Kick;
@@ -171,6 +172,12 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_12_1, 0x4A ),
                     map( ProtocolConstants.MINECRAFT_1_13, 0x4E )
             );
+            TO_CLIENT.registerPacket(
+                    EntityStatus.class,
+                    map( ProtocolConstants.MINECRAFT_1_8, 0x1A ),
+                    map( ProtocolConstants.MINECRAFT_1_9, 0x1B ),
+                    map( ProtocolConstants.MINECRAFT_1_13, 0x1C )
+            );
 
             TO_SERVER.registerPacket(
                     KeepAlive.class,

protocol/src/main/java/net/md_5/bungee/protocol/packet/EntityStatus.java

@@ -0,0 +1,43 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class EntityStatus extends DefinedPacket
+{
+
+    public static final byte DEBUG_INFO_REDUCED = 22;
+    public static final byte DEBUG_INFO_NORMAL = 23;
+    //
+    private int entityId;
+    private byte status;
+
+    @Override
+    public void read(ByteBuf buf)
+    {
+        entityId = buf.readInt();
+        status = buf.readByte();
+    }
+
+    @Override
+    public void write(ByteBuf buf)
+    {
+        buf.writeInt( entityId );
+        buf.writeByte( status );
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        handler.handle( this );
+    }
+}

proxy/src/main/java/net/md_5/bungee/ServerConnector.java

@@ -35,6 +35,7 @@ import net.md_5.bungee.protocol.PacketWrapper;
 import net.md_5.bungee.protocol.Protocol;
 import net.md_5.bungee.protocol.ProtocolConstants;
 import net.md_5.bungee.protocol.packet.EncryptionRequest;
+import net.md_5.bungee.protocol.packet.EntityStatus;
 import net.md_5.bungee.protocol.packet.Handshake;
 import net.md_5.bungee.protocol.packet.Kick;
 import net.md_5.bungee.protocol.packet.Login;
@@ -206,7 +207,7 @@ public class ServerConnector extends PacketHandler
             user.setClientEntityId( login.getEntityId() );
             user.setServerEntityId( login.getEntityId() );
 
-            // Set tab list size, this sucks balls, TODO: what shall we do about packet mutability
+            // Set tab list size, TODO: what shall we do about packet mutability
             Login modLogin = new Login( login.getEntityId(), login.getGameMode(), (byte) login.getDimension(), login.getDifficulty(),
                     (byte) user.getPendingConnection().getListener().getTabListSize(), login.getLevelType(), login.isReducedDebugInfo() );
 
@@ -245,6 +246,9 @@ public class ServerConnector extends PacketHandler
             }
             user.getSentBossBars().clear();
 
+            // Update debug info from login packet
+            user.unsafe().sendPacket( new EntityStatus( user.getClientEntityId(), login.isReducedDebugInfo() ? EntityStatus.DEBUG_INFO_REDUCED : EntityStatus.DEBUG_INFO_NORMAL ) );
+
             user.setDimensionChange( true );
             if ( login.getDimension() == user.getDimension() )
             {