#3408: ConcurrentModificationException when player quits

chat/pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.9</version>
+            <version>2.10</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>

config/pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.9</version>
+            <version>2.10</version>
             <scope>compile</scope>
             <optional>true</optional>
         </dependency>

pom.xml

@@ -89,7 +89,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>31.0.1-jre</version>
+            <version>31.1-jre</version>
             <scope>compile</scope>
         </dependency>
         <dependency>

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

@@ -25,6 +25,8 @@ import net.md_5.bungee.protocol.packet.LoginSuccess;
 import net.md_5.bungee.protocol.packet.PingPacket;
 import net.md_5.bungee.protocol.packet.PlayerListHeaderFooter;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
+import net.md_5.bungee.protocol.packet.PlayerListItemRemove;
+import net.md_5.bungee.protocol.packet.PlayerListItemUpdate;
 import net.md_5.bungee.protocol.packet.PluginMessage;
 import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
@@ -114,6 +116,14 @@ public abstract class AbstractPacketHandler
     {
     }
 
+    public void handle(PlayerListItemRemove playerListItem) throws Exception
+    {
+    }
+
+    public void handle(PlayerListItemUpdate playerListItem) throws Exception
+    {
+    }
+
     public void handle(PlayerListHeaderFooter playerListHeaderFooter) throws Exception
     {
     }

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

@@ -9,6 +9,9 @@ import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.BitSet;
+import java.util.EnumSet;
 import java.util.List;
 import java.util.UUID;
 import lombok.RequiredArgsConstructor;
@@ -308,6 +311,53 @@ public abstract class DefinedPacket
         }
     }
 
+    public static <E extends Enum<E>> void writeEnumSet(EnumSet<E> enumset, Class<E> oclass, ByteBuf buf)
+    {
+        E[] enums = oclass.getEnumConstants();
+        BitSet bits = new BitSet( enums.length );
+
+        for ( int i = 0; i < enums.length; ++i )
+        {
+            bits.set( i, enumset.contains( enums[i] ) );
+        }
+
+        writeFixedBitSet( bits, enums.length, buf );
+    }
+
+    public static <E extends Enum<E>> EnumSet<E> readEnumSet(Class<E> oclass, ByteBuf buf)
+    {
+        E[] enums = oclass.getEnumConstants();
+        BitSet bits = readFixedBitSet( enums.length, buf );
+        EnumSet<E> set = EnumSet.noneOf( oclass );
+
+        for ( int i = 0; i < enums.length; ++i )
+        {
+            if ( bits.get( i ) )
+            {
+                set.add( enums[i] );
+            }
+        }
+
+        return set;
+    }
+
+    public static BitSet readFixedBitSet(int i, ByteBuf buf)
+    {
+        byte[] bits = new byte[ ( i + 8 ) >> 3 ];
+        buf.readBytes( bits );
+
+        return BitSet.valueOf( bits );
+    }
+
+    public static void writeFixedBitSet(BitSet bits, int size, ByteBuf buf)
+    {
+        if ( bits.length() > size )
+        {
+            throw new OverflowPacketException( "BitSet too large (expected " + size + " got " + bits.size() + ")" );
+        }
+        buf.writeBytes( Arrays.copyOf( bits.toByteArray(), ( size + 8 ) >> 3 ) );
+    }
+
     public void read(ByteBuf buf)
     {
         throw new UnsupportedOperationException( "Packet must implement read method" );

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

@@ -31,6 +31,8 @@ import net.md_5.bungee.protocol.packet.LoginSuccess;
 import net.md_5.bungee.protocol.packet.PingPacket;
 import net.md_5.bungee.protocol.packet.PlayerListHeaderFooter;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
+import net.md_5.bungee.protocol.packet.PlayerListItemRemove;
+import net.md_5.bungee.protocol.packet.PlayerListItemUpdate;
 import net.md_5.bungee.protocol.packet.PluginMessage;
 import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
@@ -81,7 +83,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x1F ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x21 ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x1E ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x20 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x20 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x1F )
             );
             TO_CLIENT.registerPacket(
                     Login.class,
@@ -94,7 +97,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x24 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x26 ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x23 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x25 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x25 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x24 )
             );
             TO_CLIENT.registerPacket( Chat.class,
                     Chat::new,
@@ -120,7 +124,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x39 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x3D ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x3B ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x3E )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x3E ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x3D )
             );
             TO_CLIENT.registerPacket(
                     BossBar.class,
@@ -144,7 +149,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x32 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x36 ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x34 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x37 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x37 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, -1 )
             );
             TO_CLIENT.registerPacket(
                     TabCompleteResponse.class,
@@ -156,7 +162,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16, 0x10 ),
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x0F ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x11 ),
-                    map( ProtocolConstants.MINECRAFT_1_19, 0x0E )
+                    map( ProtocolConstants.MINECRAFT_1_19, 0x0E ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x0D )
             );
             TO_CLIENT.registerPacket(
                     ScoreboardObjective.class,
@@ -169,7 +176,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_14, 0x49 ),
                     map( ProtocolConstants.MINECRAFT_1_15, 0x4A ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x53 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x56 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x56 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x54 )
             );
             TO_CLIENT.registerPacket(
                     ScoreboardScore.class,
@@ -182,7 +190,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_14, 0x4C ),
                     map( ProtocolConstants.MINECRAFT_1_15, 0x4D ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x56 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x59 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x59 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x57 )
             );
             TO_CLIENT.registerPacket(
                     ScoreboardDisplay.class,
@@ -195,7 +204,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_14, 0x42 ),
                     map( ProtocolConstants.MINECRAFT_1_15, 0x43 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x4C ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x4F )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x4F ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x4D )
             );
             TO_CLIENT.registerPacket(
                     Team.class,
@@ -208,7 +218,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_14, 0x4B ),
                     map( ProtocolConstants.MINECRAFT_1_15, 0x4C ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x55 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x58 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x58 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x56 )
             );
             TO_CLIENT.registerPacket(
                     PluginMessage.class,
@@ -222,7 +233,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x17 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x18 ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x15 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x16 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x16 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x15 )
             );
             TO_CLIENT.registerPacket(
                     Kick.class,
@@ -236,7 +248,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x19 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x1A ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x17 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x19 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x19 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x17 )
             );
             TO_CLIENT.registerPacket(
                     Title.class,
@@ -250,33 +263,38 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16, 0x4F ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x59 ),
                     map( ProtocolConstants.MINECRAFT_1_18, 0x5A ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x5D )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x5D ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x5B )
             );
             TO_CLIENT.registerPacket(
                     ClearTitles.class,
                     ClearTitles::new,
                     map( ProtocolConstants.MINECRAFT_1_17, 0x10 ),
-                    map( ProtocolConstants.MINECRAFT_1_19, 0x0D )
+                    map( ProtocolConstants.MINECRAFT_1_19, 0x0D ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x0C )
             );
             TO_CLIENT.registerPacket(
                     Subtitle.class,
                     Subtitle::new,
                     map( ProtocolConstants.MINECRAFT_1_17, 0x57 ),
                     map( ProtocolConstants.MINECRAFT_1_18, 0x58 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x5B )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x5B ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x59 )
             );
             TO_CLIENT.registerPacket(
                     TitleTimes.class,
                     TitleTimes::new,
                     map( ProtocolConstants.MINECRAFT_1_17, 0x5A ),
                     map( ProtocolConstants.MINECRAFT_1_18, 0x5B ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x5E )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x5E ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x5C )
             );
             TO_CLIENT.registerPacket(
                     SystemChat.class,
                     SystemChat::new,
                     map( ProtocolConstants.MINECRAFT_1_19, 0x5F ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x62 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x62 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x60 )
             );
             TO_CLIENT.registerPacket(
                     PlayerListHeaderFooter.class,
@@ -293,7 +311,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_17, 0x5E ),
                     map( ProtocolConstants.MINECRAFT_1_18, 0x5F ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x60 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x63 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x63 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x61 )
             );
             TO_CLIENT.registerPacket(
                     EntityStatus.class,
@@ -307,7 +326,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x1A ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x1B ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x18 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x1A )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x1A ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x19 )
             );
             TO_CLIENT.registerPacket(
                     Commands.class,
@@ -317,7 +337,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16, 0x11 ),
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x10 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x12 ),
-                    map( ProtocolConstants.MINECRAFT_1_19, 0x0F )
+                    map( ProtocolConstants.MINECRAFT_1_19, 0x0F ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x0E )
             );
             TO_CLIENT.registerPacket(
                     GameState.class,
@@ -327,7 +348,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16_2, 0x1D ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x1E ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x1B ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x1D )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x1D ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x1C )
             );
             TO_CLIENT.registerPacket(
                     ViewDistance.class,
@@ -337,13 +359,25 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16, 0x41 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x4A ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x49 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x4C )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x4C ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x4B )
             );
             TO_CLIENT.registerPacket(
                     ServerData.class,
                     ServerData::new,
                     map( ProtocolConstants.MINECRAFT_1_19, 0x3F ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x42 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x42 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x41 )
+            );
+            TO_CLIENT.registerPacket(
+                    PlayerListItemRemove.class,
+                    PlayerListItemRemove::new,
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x35 )
+            );
+            TO_CLIENT.registerPacket(
+                    PlayerListItemUpdate.class,
+                    PlayerListItemUpdate::new,
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x36 )
             );
 
             TO_SERVER.registerPacket(
@@ -358,7 +392,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_16, 0x10 ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x0F ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x11 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x12 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x12 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x11 )
             );
             TO_SERVER.registerPacket( Chat.class,
                     Chat::new,
@@ -391,7 +426,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_13, 0x05 ),
                     map( ProtocolConstants.MINECRAFT_1_14, 0x06 ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x08 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x09 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x09 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x08 )
             );
             TO_SERVER.registerPacket(
                     ClientSettings.class,
@@ -402,7 +438,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_12_1, 0x04 ),
                     map( ProtocolConstants.MINECRAFT_1_14, 0x05 ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x07 ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x08 )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x08 ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x07 )
             );
             TO_SERVER.registerPacket(
                     PluginMessage.class,
@@ -415,7 +452,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_14, 0x0B ),
                     map( ProtocolConstants.MINECRAFT_1_17, 0x0A ),
                     map( ProtocolConstants.MINECRAFT_1_19, 0x0C ),
-                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x0D )
+                    map( ProtocolConstants.MINECRAFT_1_19_1, 0x0D ),
+                    map( ProtocolConstants.MINECRAFT_1_19_3, 0x0C )
             );
         }
     },

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

@@ -40,6 +40,7 @@ public class ProtocolConstants
     public static final int MINECRAFT_1_18_2 = 758;
     public static final int MINECRAFT_1_19 = 759;
     public static final int MINECRAFT_1_19_1 = 760;
+    public static final int MINECRAFT_1_19_3 = 761;
     public static final List<String> SUPPORTED_VERSIONS;
     public static final List<Integer> SUPPORTED_VERSION_IDS;
 
@@ -92,7 +93,8 @@ public class ProtocolConstants
                 ProtocolConstants.MINECRAFT_1_18,
                 ProtocolConstants.MINECRAFT_1_18_2,
                 ProtocolConstants.MINECRAFT_1_19,
-                ProtocolConstants.MINECRAFT_1_19_1
+                ProtocolConstants.MINECRAFT_1_19_1,
+                ProtocolConstants.MINECRAFT_1_19_3
         );
 
         if ( SNAPSHOT_SUPPORT )

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

@@ -0,0 +1,39 @@
+package net.md_5.bungee.protocol;
+
+import io.netty.buffer.ByteBuf;
+import java.util.BitSet;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class SeenMessages extends DefinedPacket
+{
+
+    private int offset;
+    private BitSet acknowledged;
+
+    @Override
+    public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        offset = DefinedPacket.readVarInt( buf );
+        acknowledged = DefinedPacket.readFixedBitSet( 20, buf );
+    }
+
+    @Override
+    public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        DefinedPacket.writeVarInt( offset, buf );
+        DefinedPacket.writeFixedBitSet( acknowledged, 20, buf );
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        throw new UnsupportedOperationException( "Not supported." );
+    }
+}

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

@@ -9,6 +9,7 @@ import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.ChatChain;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
+import net.md_5.bungee.protocol.SeenMessages;
 
 @Data
 @NoArgsConstructor
@@ -23,6 +24,7 @@ public class ClientChat extends DefinedPacket
     private byte[] signature;
     private boolean signedPreview;
     private ChatChain chain;
+    private SeenMessages seenMessages;
 
     @Override
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
@@ -30,9 +32,27 @@ public class ClientChat extends DefinedPacket
         message = readString( buf, 256 );
         timestamp = buf.readLong();
         salt = buf.readLong();
-        signature = readArray( buf );
+
-        signedPreview = buf.readBoolean();
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
-        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
+        {
+            if ( buf.readBoolean() )
+            {
+                signature = new byte[ 256 ];
+                buf.readBytes( signature );
+            }
+        } else
+        {
+            signature = readArray( buf );
+        }
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            signedPreview = buf.readBoolean();
+        }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            seenMessages = new SeenMessages();
+            seenMessages.read( buf, direction, protocolVersion );
+        } else if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
         {
             chain = new ChatChain();
             chain.read( buf, direction, protocolVersion );
@@ -45,9 +65,25 @@ public class ClientChat extends DefinedPacket
         writeString( message, buf );
         buf.writeLong( timestamp );
         buf.writeLong( salt );
-        writeArray( signature, buf );
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
-        buf.writeBoolean( signedPreview );
+        {
-        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
+            buf.writeBoolean( signature != null );
+            if ( signature != null )
+            {
+                buf.writeBytes( signature );
+            }
+        } else
+        {
+            writeArray( signature, buf );
+        }
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            buf.writeBoolean( signedPreview );
+        }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            seenMessages.write( buf, direction, protocolVersion );
+        } else if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
         {
             chain.write( buf, direction, protocolVersion );
         }

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

@@ -12,6 +12,7 @@ import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.ChatChain;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
+import net.md_5.bungee.protocol.SeenMessages;
 
 @Data
 @NoArgsConstructor
@@ -26,6 +27,7 @@ public class ClientCommand extends DefinedPacket
     private Map<String, byte[]> signatures;
     private boolean signedPreview;
     private ChatChain chain;
+    private SeenMessages seenMessages;
 
     @Override
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
@@ -39,11 +41,29 @@ public class ClientCommand extends DefinedPacket
         signatures = new HashMap<>( cnt );
         for ( int i = 0; i < cnt; i++ )
         {
-            signatures.put( readString( buf, 16 ), readArray( buf ) );
+            String name = readString( buf, 16 );
+            byte[] signature;
+
+            if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
+            {
+                signature = new byte[ 256 ];
+                buf.readBytes( signature );
+            } else
+            {
+                signature = readArray( buf );
+            }
+            signatures.put( name, signature );
         }
 
-        signedPreview = buf.readBoolean();
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
-        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
+        {
+            signedPreview = buf.readBoolean();
+        }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            seenMessages = new SeenMessages();
+            seenMessages.read( buf, direction, protocolVersion );
+        } else if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
         {
             chain = new ChatChain();
             chain.read( buf, direction, protocolVersion );
@@ -61,11 +81,23 @@ public class ClientCommand extends DefinedPacket
         for ( Map.Entry<String, byte[]> entry : signatures.entrySet() )
         {
             writeString( entry.getKey(), buf );
-            writeArray( entry.getValue(), buf );
+            if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
+            {
+                buf.writeBytes( entry.getValue() );
+            } else
+            {
+                writeArray( entry.getValue(), buf );
+            }
         }
 
-        buf.writeBoolean( signedPreview );
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
-        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
+        {
+            buf.writeBoolean( signedPreview );
+        }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            seenMessages.write( buf, direction, protocolVersion );
+        } else if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
         {
             chain.write( buf, direction, protocolVersion );
         }

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

@@ -23,13 +23,11 @@ import com.mojang.brigadier.tree.LiteralCommandNode;
 import com.mojang.brigadier.tree.RootCommandNode;
 import io.netty.buffer.ByteBuf;
 import java.util.ArrayDeque;
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 import lombok.AllArgsConstructor;
@@ -309,7 +307,8 @@ public class Commands extends DefinedPacket
     {
 
         private static final Map<String, ArgumentSerializer> PROVIDERS = new HashMap<>();
-        private static final List<ArgumentSerializer> PROVIDER_LIST = new ArrayList<>();
+        private static final ArgumentSerializer[] IDS_1_19;
+        private static final ArgumentSerializer[] IDS_1_19_3;
         private static final Map<Class<?>, ProperArgumentSerializer<?>> PROPER_PROVIDERS = new HashMap<>();
         //
         private static final ArgumentSerializer<Void> VOID = new ArgumentSerializer<Void>()
@@ -575,13 +574,124 @@ public class Commands extends DefinedPacket
             register( "minecraft:template_rotation", VOID ); // 1.19
             register( "minecraft:uuid", VOID ); // 1.16
 
+            register( "minecraft:gamemode", VOID ); // 1.19.3
+            register( "minecraft:resource_or_tag_key", RAW_STRING ); // 1.19.3
+            register( "minecraft:resource_key", RAW_STRING ); // 1.19.3
+
             register( "minecraft:nbt", VOID ); // 1.13 // removed
+            IDS_1_19 = new ArgumentSerializer[]
+            {
+                get( "brigadier:bool" ),
+                get( "brigadier:float" ),
+                get( "brigadier:double" ),
+                get( "brigadier:integer" ),
+                get( "brigadier:long" ),
+                get( "brigadier:string" ),
+                get( "minecraft:entity" ),
+                get( "minecraft:game_profile" ),
+                get( "minecraft:block_pos" ),
+                get( "minecraft:column_pos" ),
+                get( "minecraft:vec3" ),
+                get( "minecraft:vec2" ),
+                get( "minecraft:block_state" ),
+                get( "minecraft:block_predicate" ),
+                get( "minecraft:item_stack" ),
+                get( "minecraft:item_predicate" ),
+                get( "minecraft:color" ),
+                get( "minecraft:component" ),
+                get( "minecraft:message" ),
+                get( "minecraft:nbt_compound_tag" ),
+                get( "minecraft:nbt_tag" ),
+                get( "minecraft:nbt_path" ),
+                get( "minecraft:objective" ),
+                get( "minecraft:objective_criteria" ),
+                get( "minecraft:operation" ),
+                get( "minecraft:particle" ),
+                get( "minecraft:angle" ),
+                get( "minecraft:rotation" ),
+                get( "minecraft:scoreboard_slot" ),
+                get( "minecraft:score_holder" ),
+                get( "minecraft:swizzle" ),
+                get( "minecraft:team" ),
+                get( "minecraft:item_slot" ),
+                get( "minecraft:resource_location" ),
+                get( "minecraft:mob_effect" ),
+                get( "minecraft:function" ),
+                get( "minecraft:entity_anchor" ),
+                get( "minecraft:int_range" ),
+                get( "minecraft:float_range" ),
+                get( "minecraft:item_enchantment" ),
+                get( "minecraft:entity_summon" ),
+                get( "minecraft:dimension" ),
+                get( "minecraft:time" ),
+                get( "minecraft:resource_or_tag" ),
+                get( "minecraft:resource" ),
+                get( "minecraft:template_mirror" ),
+                get( "minecraft:template_rotation" ),
+                get( "minecraft:uuid" )
+            };
+
+            IDS_1_19_3 = new ArgumentSerializer[]
+            {
+                get( "brigadier:bool" ),
+                get( "brigadier:float" ),
+                get( "brigadier:double" ),
+                get( "brigadier:integer" ),
+                get( "brigadier:long" ),
+                get( "brigadier:string" ),
+                get( "minecraft:entity" ),
+                get( "minecraft:game_profile" ),
+                get( "minecraft:block_pos" ),
+                get( "minecraft:column_pos" ),
+                get( "minecraft:vec3" ),
+                get( "minecraft:vec2" ),
+                get( "minecraft:block_state" ),
+                get( "minecraft:block_predicate" ),
+                get( "minecraft:item_stack" ),
+                get( "minecraft:item_predicate" ),
+                get( "minecraft:color" ),
+                get( "minecraft:component" ),
+                get( "minecraft:message" ),
+                get( "minecraft:nbt_compound_tag" ),
+                get( "minecraft:nbt_tag" ),
+                get( "minecraft:nbt_path" ),
+                get( "minecraft:objective" ),
+                get( "minecraft:objective_criteria" ),
+                get( "minecraft:operation" ),
+                get( "minecraft:particle" ),
+                get( "minecraft:angle" ),
+                get( "minecraft:rotation" ),
+                get( "minecraft:scoreboard_slot" ),
+                get( "minecraft:score_holder" ),
+                get( "minecraft:swizzle" ),
+                get( "minecraft:team" ),
+                get( "minecraft:item_slot" ),
+                get( "minecraft:resource_location" ),
+                get( "minecraft:function" ),
+                get( "minecraft:entity_anchor" ),
+                get( "minecraft:int_range" ),
+                get( "minecraft:float_range" ),
+                get( "minecraft:dimension" ),
+                get( "minecraft:gamemode" ),
+                get( "minecraft:time" ),
+                get( "minecraft:resource_or_tag" ),
+                get( "minecraft:resource_or_tag_key" ),
+                get( "minecraft:resource" ),
+                get( "minecraft:resource_key" ),
+                get( "minecraft:template_mirror" ),
+                get( "minecraft:template_rotation" ),
+                get( "minecraft:uuid" )
+            };
         }
 
         private static void register(String name, ArgumentSerializer serializer)
         {
             PROVIDERS.put( name, serializer );
-            PROVIDER_LIST.add( serializer );
+        }
+
+        private static ArgumentSerializer get(String name)
+        {
+            return PROVIDERS.get( name );
         }
 
         private static ArgumentType<?> read(ByteBuf buf, int protocolVersion)
@@ -592,7 +702,14 @@ public class Commands extends DefinedPacket
             if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 )
             {
                 key = readVarInt( buf );
-                reader = PROVIDER_LIST.get( (Integer) key );
+
+                if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )
+                {
+                    reader = IDS_1_19_3[(Integer) key];
+                } else
+                {
+                    reader = IDS_1_19[(Integer) key];
+                }
             } else
             {
                 key = readString( buf );

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

@@ -23,7 +23,7 @@ public class EncryptionResponse extends DefinedPacket
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
         sharedSecret = readArray( buf, 128 );
-        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19 || buf.readBoolean() )
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19 || protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 || buf.readBoolean() )
         {
             verifyToken = readArray( buf, 128 );
         } else
@@ -38,7 +38,7 @@ public class EncryptionResponse extends DefinedPacket
         writeArray( sharedSecret, buf );
         if ( verifyToken != null )
         {
-            if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 )
+            if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 && protocolVersion <= ProtocolConstants.MINECRAFT_1_19_3 )
             {
                 buf.writeBoolean( true );
             }

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

@@ -26,7 +26,7 @@ public class LoginRequest extends DefinedPacket
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
         data = readString( buf, 16 );
-        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 )
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 && protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
         {
             publicKey = readPublicKey( buf );
         }
@@ -43,7 +43,7 @@ public class LoginRequest extends DefinedPacket
     public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
         writeString( data, buf );
-        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 )
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 && protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
         {
             writePublicKey( publicKey, buf );
         }

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

@@ -123,21 +123,26 @@ public class PlayerListItem extends DefinedPacket
     {
 
         // ALL
-        private UUID uuid;
+        UUID uuid;
 
         // ADD_PLAYER
-        private String username;
+        String username;
-        private Property[] properties;
+        Property[] properties;
-        private PlayerPublicKey publicKey;
+
+        UUID chatSessionId;
+        PlayerPublicKey publicKey;
+
+        // UPDATE_LISTED
+        Boolean listed;
 
         // ADD_PLAYER & UPDATE_GAMEMODE
-        private int gamemode;
+        Integer gamemode;
 
         // ADD_PLAYER & UPDATE_LATENCY
-        private int ping;
+        Integer ping;
 
         // ADD_PLAYER & UPDATE_DISPLAY_NAME
-        private String displayName;
+        String displayName;
 
     }
 }

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

@@ -0,0 +1,45 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import java.util.UUID;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.ProtocolConstants;
+
+@Data
+@NoArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class PlayerListItemRemove extends DefinedPacket
+{
+
+    private UUID[] uuids;
+
+    @Override
+    public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        uuids = new UUID[ DefinedPacket.readVarInt( buf ) ];
+        for ( int i = 0; i < uuids.length; i++ )
+        {
+            uuids[i] = DefinedPacket.readUUID( buf );
+        }
+    }
+
+    @Override
+    public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        DefinedPacket.writeVarInt( uuids.length, buf );
+        for ( UUID uuid : uuids )
+        {
+            DefinedPacket.writeUUID( uuid, buf );
+        }
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        handler.handle( this );
+    }
+}

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

@@ -0,0 +1,133 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import java.util.EnumSet;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.PlayerPublicKey;
+import net.md_5.bungee.protocol.ProtocolConstants;
+import net.md_5.bungee.protocol.packet.PlayerListItem.Item;
+
+@Data
+@NoArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class PlayerListItemUpdate extends DefinedPacket
+{
+
+    private EnumSet<Action> actions;
+    private Item[] items;
+
+    @Override
+    public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        actions = readEnumSet( PlayerListItemUpdate.Action.class, buf );
+
+        items = new Item[ DefinedPacket.readVarInt( buf ) ];
+        for ( int i = 0; i < items.length; i++ )
+        {
+            Item item = items[i] = new Item();
+            item.setUuid( DefinedPacket.readUUID( buf ) );
+
+            for ( Action action : actions )
+            {
+                switch ( action )
+                {
+                    case ADD_PLAYER:
+                        item.username = DefinedPacket.readString( buf );
+                        item.properties = DefinedPacket.readProperties( buf );
+                        break;
+                    case INITIALIZE_CHAT:
+                        if ( buf.readBoolean() )
+                        {
+                            item.chatSessionId = readUUID( buf );
+                            item.publicKey = new PlayerPublicKey( buf.readLong(), readArray( buf, 512 ), readArray( buf, 4096 ) );
+                        }
+                        break;
+                    case UPDATE_GAMEMODE:
+                        item.gamemode = DefinedPacket.readVarInt( buf );
+                        break;
+                    case UPDATE_LISTED:
+                        item.listed = buf.readBoolean();
+                        break;
+                    case UPDATE_LATENCY:
+                        item.ping = DefinedPacket.readVarInt( buf );
+                        break;
+                    case UPDATE_DISPLAY_NAME:
+                        if ( buf.readBoolean() )
+                        {
+                            item.displayName = DefinedPacket.readString( buf );
+                        }
+                        break;
+                }
+            }
+        }
+    }
+
+    @Override
+    public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        DefinedPacket.writeEnumSet( actions, PlayerListItemUpdate.Action.class, buf );
+
+        DefinedPacket.writeVarInt( items.length, buf );
+        for ( Item item : items )
+        {
+            DefinedPacket.writeUUID( item.uuid, buf );
+            for ( Action action : actions )
+            {
+                switch ( action )
+                {
+                    case ADD_PLAYER:
+                        DefinedPacket.writeString( item.username, buf );
+                        DefinedPacket.writeProperties( item.properties, buf );
+                        break;
+                    case INITIALIZE_CHAT:
+                        buf.writeBoolean( item.chatSessionId != null );
+                        if ( item.chatSessionId != null )
+                        {
+                            writeUUID( item.chatSessionId, buf );
+                            buf.writeLong( item.publicKey.getExpiry() );
+                            writeArray( item.publicKey.getKey(), buf );
+                            writeArray( item.publicKey.getSignature(), buf );
+                        }
+                        break;
+                    case UPDATE_GAMEMODE:
+                        DefinedPacket.writeVarInt( item.gamemode, buf );
+                        break;
+                    case UPDATE_LISTED:
+                        buf.writeBoolean( item.listed );
+                        break;
+                    case UPDATE_LATENCY:
+                        DefinedPacket.writeVarInt( item.ping, buf );
+                        break;
+                    case UPDATE_DISPLAY_NAME:
+                        buf.writeBoolean( item.displayName != null );
+                        if ( item.displayName != null )
+                        {
+                            DefinedPacket.writeString( item.displayName, buf );
+                        }
+                        break;
+                }
+            }
+        }
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        handler.handle( this );
+    }
+
+    public static enum Action
+    {
+
+        ADD_PLAYER,
+        INITIALIZE_CHAT,
+        UPDATE_GAMEMODE,
+        UPDATE_LISTED,
+        UPDATE_LATENCY,
+        UPDATE_DISPLAY_NAME;
+    }
+}

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

@@ -33,7 +33,10 @@ public class ServerData extends DefinedPacket
             icon = readString( buf );
         }
 
-        preview = buf.readBoolean();
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            preview = buf.readBoolean();
+        }
 
         if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
         {
@@ -62,7 +65,10 @@ public class ServerData extends DefinedPacket
             buf.writeBoolean( false );
         }
 
-        buf.writeBoolean( preview );
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_19_3 )
+        {
+            buf.writeBoolean( preview );
+        }
 
         if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
         {

proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java

@@ -54,6 +54,8 @@ import net.md_5.bungee.protocol.packet.Commands;
 import net.md_5.bungee.protocol.packet.KeepAlive;
 import net.md_5.bungee.protocol.packet.Kick;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
+import net.md_5.bungee.protocol.packet.PlayerListItemRemove;
+import net.md_5.bungee.protocol.packet.PlayerListItemUpdate;
 import net.md_5.bungee.protocol.packet.PluginMessage;
 import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
@@ -153,6 +155,20 @@ public class DownstreamBridge extends PacketHandler
         throw CancelSendSignal.INSTANCE; // Always throw because of profile rewriting
     }
 
+    @Override
+    public void handle(PlayerListItemRemove playerList) throws Exception
+    {
+        con.getTabListHandler().onUpdate( TabList.rewrite( playerList ) );
+        throw CancelSendSignal.INSTANCE; // Always throw because of profile rewriting
+    }
+
+    @Override
+    public void handle(PlayerListItemUpdate playerList) throws Exception
+    {
+        con.getTabListHandler().onUpdate( TabList.rewrite( playerList ) );
+        throw CancelSendSignal.INSTANCE; // Always throw because of profile rewriting
+    }
+
     @Override
     public void handle(ScoreboardObjective objective) throws Exception
     {

proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java

@@ -383,7 +383,7 @@ public class InitialHandler extends PacketHandler implements PendingConnection
             return;
         }
 
-        if ( BungeeCord.getInstance().config.isEnforceSecureProfile() )
+        if ( BungeeCord.getInstance().config.isEnforceSecureProfile() && getVersion() < ProtocolConstants.MINECRAFT_1_19_3 )
         {
             PlayerPublicKey publicKey = loginRequest.getPublicKey();
             if ( publicKey == null )
@@ -522,7 +522,7 @@ public class InitialHandler extends PacketHandler implements PendingConnection
 
         if ( BungeeCord.getInstance().config.isEnforceSecureProfile() )
         {
-            if ( getVersion() >= ProtocolConstants.MINECRAFT_1_19_1 )
+            if ( getVersion() >= ProtocolConstants.MINECRAFT_1_19_1 && getVersion() < ProtocolConstants.MINECRAFT_1_19_3 )
             {
                 boolean secure = false;
                 try

proxy/src/main/java/net/md_5/bungee/connection/UpstreamBridge.java

@@ -8,6 +8,7 @@ import io.netty.channel.Channel;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.UUID;
 import net.md_5.bungee.BungeeCord;
 import net.md_5.bungee.ServerConnection.KeepAliveData;
 import net.md_5.bungee.UserConnection;
@@ -31,6 +32,7 @@ import net.md_5.bungee.protocol.packet.ClientCommand;
 import net.md_5.bungee.protocol.packet.ClientSettings;
 import net.md_5.bungee.protocol.packet.KeepAlive;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
+import net.md_5.bungee.protocol.packet.PlayerListItemRemove;
 import net.md_5.bungee.protocol.packet.PluginMessage;
 import net.md_5.bungee.protocol.packet.TabCompleteRequest;
 import net.md_5.bungee.protocol.packet.TabCompleteResponse;
@@ -75,17 +77,30 @@ public class UpstreamBridge extends PacketHandler
             // TODO: This should only done with server_unique
             //       tab list (which is the only one supported
             //       currently)
-            PlayerListItem packet = new PlayerListItem();
+            PlayerListItem oldPacket = new PlayerListItem();
-            packet.setAction( PlayerListItem.Action.REMOVE_PLAYER );
+            oldPacket.setAction( PlayerListItem.Action.REMOVE_PLAYER );
             PlayerListItem.Item item = new PlayerListItem.Item();
             item.setUuid( con.getUniqueId() );
-            packet.setItems( new PlayerListItem.Item[]
+            oldPacket.setItems( new PlayerListItem.Item[]
             {
                 item
             } );
+
+            PlayerListItemRemove newPacket = new PlayerListItemRemove();
+            newPacket.setUuids( new UUID[]
+            {
+                con.getUniqueId()
+            } );
+
             for ( ProxiedPlayer player : con.getServer().getInfo().getPlayers() )
             {
-                player.unsafe().sendPacket( packet );
+                if ( player.getPendingConnection().getVersion() >= ProtocolConstants.MINECRAFT_1_19_3 )
+                {
+                    player.unsafe().sendPacket( newPacket );
+                } else
+                {
+                    player.unsafe().sendPacket( oldPacket );
+                }
             }
             con.getServer().disconnect( "Quitting" );
         }

proxy/src/main/java/net/md_5/bungee/entitymap/EntityMap.java

@@ -77,6 +77,7 @@ public abstract class EntityMap
             case ProtocolConstants.MINECRAFT_1_19:
                 return EntityMap_1_16_2.INSTANCE_1_19;
             case ProtocolConstants.MINECRAFT_1_19_1:
+            case ProtocolConstants.MINECRAFT_1_19_3:
                 return EntityMap_1_16_2.INSTANCE_1_19_1;
         }
         throw new RuntimeException( "Version " + version + " has no entity map" );

proxy/src/main/java/net/md_5/bungee/tab/ServerUnique.java

@@ -4,7 +4,10 @@ import java.util.Collection;
 import java.util.HashSet;
 import java.util.UUID;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.protocol.ProtocolConstants;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
+import net.md_5.bungee.protocol.packet.PlayerListItemRemove;
+import net.md_5.bungee.protocol.packet.PlayerListItemUpdate;
 
 public class ServerUnique extends TabList
 {
@@ -32,6 +35,32 @@ public class ServerUnique extends TabList
         player.unsafe().sendPacket( playerListItem );
     }
 
+    @Override
+    public void onUpdate(PlayerListItemRemove playerListItem)
+    {
+        for ( UUID uuid : playerListItem.getUuids() )
+        {
+            uuids.remove( uuid );
+        }
+        player.unsafe().sendPacket( playerListItem );
+    }
+
+    @Override
+    public void onUpdate(PlayerListItemUpdate playerListItem)
+    {
+        for ( PlayerListItem.Item item : playerListItem.getItems() )
+        {
+            for ( PlayerListItemUpdate.Action action : playerListItem.getActions() )
+            {
+                if ( action == PlayerListItemUpdate.Action.ADD_PLAYER )
+                {
+                    uuids.add( item.getUuid() );
+                }
+            }
+        }
+        player.unsafe().sendPacket( playerListItem );
+    }
+
     @Override
     public void onPingChange(int ping)
     {
@@ -41,17 +70,25 @@ public class ServerUnique extends TabList
     @Override
     public void onServerChange()
     {
-        PlayerListItem packet = new PlayerListItem();
+        if ( player.getPendingConnection().getVersion() >= ProtocolConstants.MINECRAFT_1_19_3 )
-        packet.setAction( PlayerListItem.Action.REMOVE_PLAYER );
-        PlayerListItem.Item[] items = new PlayerListItem.Item[ uuids.size() ];
-        int i = 0;
-        for ( UUID uuid : uuids )
         {
-            PlayerListItem.Item item = items[i++] = new PlayerListItem.Item();
+            PlayerListItemRemove packet = new PlayerListItemRemove();
-            item.setUuid( uuid );
+            packet.setUuids( uuids.stream().toArray( UUID[]::new ) );
+            player.unsafe().sendPacket( packet );
+        } else
+        {
+            PlayerListItem packet = new PlayerListItem();
+            packet.setAction( PlayerListItem.Action.REMOVE_PLAYER );
+            PlayerListItem.Item[] items = new PlayerListItem.Item[ uuids.size() ];
+            int i = 0;
+            for ( UUID uuid : uuids )
+            {
+                PlayerListItem.Item item = items[i++] = new PlayerListItem.Item();
+                item.setUuid( uuid );
+            }
+            packet.setItems( items );
+            player.unsafe().sendPacket( packet );
         }
-        packet.setItems( items );
-        player.unsafe().sendPacket( packet );
         uuids.clear();
     }
 
@@ -66,4 +103,5 @@ public class ServerUnique extends TabList
     {
 
     }
+
 }

proxy/src/main/java/net/md_5/bungee/tab/TabList.java

@@ -7,6 +7,8 @@ import net.md_5.bungee.api.connection.ProxiedPlayer;
 import net.md_5.bungee.connection.LoginResult;
 import net.md_5.bungee.protocol.Property;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
+import net.md_5.bungee.protocol.packet.PlayerListItemRemove;
+import net.md_5.bungee.protocol.packet.PlayerListItemUpdate;
 
 @RequiredArgsConstructor
 public abstract class TabList
@@ -16,6 +18,10 @@ public abstract class TabList
 
     public abstract void onUpdate(PlayerListItem playerListItem);
 
+    public abstract void onUpdate(PlayerListItemRemove playerListItem);
+
+    public abstract void onUpdate(PlayerListItemUpdate playerListItem);
+
     public abstract void onPingChange(int ping);
 
     public abstract void onServerChange();
@@ -28,14 +34,48 @@ public abstract class TabList
     {
         for ( PlayerListItem.Item item : playerListItem.getItems() )
         {
-            if ( item.getUuid() == null ) // Old style ping
+            rewrite( item );
-            {
+        }
-                continue;
+        return playerListItem;
-            }
+    }
-            UserConnection player = BungeeCord.getInstance().getPlayerByOfflineUUID( item.getUuid() );
+
+    public static PlayerListItemRemove rewrite(PlayerListItemRemove playerListItem)
+    {
+        for ( int i = 0; i < playerListItem.getUuids().length; i++ )
+        {
+            UserConnection player = BungeeCord.getInstance().getPlayerByOfflineUUID( playerListItem.getUuids()[i] );
             if ( player != null )
             {
-                item.setUuid( player.getUniqueId() );
+                playerListItem.getUuids()[i] = player.getUniqueId();
+
+            }
+        }
+
+        return playerListItem;
+    }
+
+    public static PlayerListItemUpdate rewrite(PlayerListItemUpdate playerListItem)
+    {
+        for ( PlayerListItem.Item item : playerListItem.getItems() )
+        {
+            rewrite( item );
+        }
+        return playerListItem;
+    }
+
+    private static void rewrite(PlayerListItem.Item item)
+    {
+        if ( item.getUuid() == null ) // Old style ping
+        {
+            return;
+        }
+        UserConnection player = BungeeCord.getInstance().getPlayerByOfflineUUID( item.getUuid() );
+        if ( player != null )
+        {
+            item.setUuid( player.getUniqueId() );
+
+            if ( item.getProperties() != null )
+            {
                 LoginResult loginResult = player.getPendingConnection().getLoginProfile();
                 if ( loginResult != null && loginResult.getProperties() != null )
                 {
@@ -49,16 +89,15 @@ public abstract class TabList
                 {
                     item.setProperties( new Property[ 0 ] );
                 }
-                if ( playerListItem.getAction() == PlayerListItem.Action.ADD_PLAYER || playerListItem.getAction() == PlayerListItem.Action.UPDATE_GAMEMODE )
+            }
-                {
+            if ( item.getGamemode() != null )
-                    player.setGamemode( item.getGamemode() );
+            {
-                }
+                player.setGamemode( item.getGamemode() );
-                if ( playerListItem.getAction() == PlayerListItem.Action.ADD_PLAYER || playerListItem.getAction() == PlayerListItem.Action.UPDATE_LATENCY )
+            }
-                {
+            if ( item.getPing() != null )
-                    player.setPing( item.getPing() );
+            {
-                }
+                player.setPing( item.getPing() );
             }
         }
-        return playerListItem;
     }
 }