1.0.3 Release: 1.20.2 protocol support

Author: hevav

VERSION

@@ -1 +1 @@
-1.0.2
+1.0.3

build.gradle

@@ -9,7 +9,7 @@ plugins {
 }
 
 setGroup("net.elytrium")
-setVersion("1.0.2")
+setVersion("1.0.3")
 
 compileJava {
     getOptions().setEncoding("UTF-8")

src/main/java/net/elytrium/limbohub/LimboHub.java

@@ -356,6 +356,7 @@ public void reload() {
             new PacketMapping(0x04, ProtocolVersion.MINECRAFT_1_16, true),
             new PacketMapping(0x02, ProtocolVersion.MINECRAFT_1_19, true),
             new PacketMapping(0x03, ProtocolVersion.MINECRAFT_1_19_4, true),
+            // There is no SpawnPlayer packet since Minecraft 1.20.2
         })
         .registerPacket(PacketDirection.CLIENTBOUND, CloseContainer.class, CloseContainer::new, new PacketMapping[]{
             new PacketMapping(0x2E, ProtocolVersion.MINECRAFT_1_8, true),
@@ -368,6 +369,7 @@ public void reload() {
             new PacketMapping(0x10, ProtocolVersion.MINECRAFT_1_19, true),
             new PacketMapping(0x0F, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x11, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x12, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, SetContainerContent.class, SetContainerContent::new, new PacketMapping[]{
             new PacketMapping(0x30, ProtocolVersion.MINECRAFT_1_8, true),
@@ -381,6 +383,7 @@ public void reload() {
             new PacketMapping(0x11, ProtocolVersion.MINECRAFT_1_19, true),
             new PacketMapping(0x10, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x12, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x13, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, SetContainerSlot.class, SetContainerSlot::new, new PacketMapping[]{
             new PacketMapping(0x2F, ProtocolVersion.MINECRAFT_1_8, true),
@@ -394,6 +397,7 @@ public void reload() {
             new PacketMapping(0x13, ProtocolVersion.MINECRAFT_1_19, true),
             new PacketMapping(0x12, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x14, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x15, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, OpenScreen.class, OpenScreen::new, new PacketMapping[]{
             new PacketMapping(0x2D, ProtocolVersion.MINECRAFT_1_8, true),
@@ -408,6 +412,7 @@ public void reload() {
             new PacketMapping(0x2D, ProtocolVersion.MINECRAFT_1_19_1, true),
             new PacketMapping(0x2C, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x30, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x31, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, SetHeadRotation.class, SetHeadRotation::new, new PacketMapping[]{
             new PacketMapping(0x19, ProtocolVersion.MINECRAFT_1_8, true),
@@ -424,6 +429,7 @@ public void reload() {
             new PacketMapping(0x3F, ProtocolVersion.MINECRAFT_1_19_1, true),
             new PacketMapping(0x3E, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x42, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x44, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, DisplayObjective.class, DisplayObjective::new, new PacketMapping[]{
             new PacketMapping(0x3D, ProtocolVersion.MINECRAFT_1_8, true),
@@ -437,6 +443,7 @@ public void reload() {
             new PacketMapping(0x4F, ProtocolVersion.MINECRAFT_1_19_1, true),
             new PacketMapping(0x4D, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x51, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x53, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, SetEntityMetadata.class, SetEntityMetadata::new, new PacketMapping[]{
             new PacketMapping(0x1C, ProtocolVersion.MINECRAFT_1_8, true),
@@ -450,6 +457,7 @@ public void reload() {
             new PacketMapping(0x50, ProtocolVersion.MINECRAFT_1_19_1, true),
             new PacketMapping(0x4E, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x52, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x54, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, UpdateObjectives.class, UpdateObjectives::new, new PacketMapping[]{
             new PacketMapping(0x3B, ProtocolVersion.MINECRAFT_1_8, true),
@@ -463,6 +471,7 @@ public void reload() {
             new PacketMapping(0x56, ProtocolVersion.MINECRAFT_1_19_1, true),
             new PacketMapping(0x54, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x58, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x5A, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, ScoreboardTeam.class, ScoreboardTeam::new, new PacketMapping[]{
             new PacketMapping(0x3E, ProtocolVersion.MINECRAFT_1_8, true),
@@ -476,6 +485,7 @@ public void reload() {
             new PacketMapping(0x58, ProtocolVersion.MINECRAFT_1_19_1, true),
             new PacketMapping(0x56, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x5A, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x5C, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.CLIENTBOUND, UpdateScore.class, UpdateScore::new, new PacketMapping[]{
             new PacketMapping(0x3C, ProtocolVersion.MINECRAFT_1_8, true),
@@ -489,6 +499,7 @@ public void reload() {
             new PacketMapping(0x59, ProtocolVersion.MINECRAFT_1_19_1, true),
             new PacketMapping(0x57, ProtocolVersion.MINECRAFT_1_19_3, true),
             new PacketMapping(0x5B, ProtocolVersion.MINECRAFT_1_19_4, true),
+            new PacketMapping(0x5D, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.SERVERBOUND, Interact.class, Interact::new, new PacketMapping[]{
             new PacketMapping(0x02, ProtocolVersion.MINECRAFT_1_8, false),
@@ -502,6 +513,7 @@ public void reload() {
             new PacketMapping(0x10, ProtocolVersion.MINECRAFT_1_19_1, false),
             new PacketMapping(0x0F, ProtocolVersion.MINECRAFT_1_19_3, false),
             new PacketMapping(0x10, ProtocolVersion.MINECRAFT_1_19_4, false),
+            new PacketMapping(0x12, ProtocolVersion.MINECRAFT_1_20_2, true),
         })
         .registerPacket(PacketDirection.SERVERBOUND, ClickContainer.class, ClickContainer::new, new PacketMapping[]{
             new PacketMapping(0x0E, ProtocolVersion.MINECRAFT_1_8, false),
@@ -515,6 +527,7 @@ public void reload() {
             new PacketMapping(0x0B, ProtocolVersion.MINECRAFT_1_19_1, false),
             new PacketMapping(0x0A, ProtocolVersion.MINECRAFT_1_19_3, false),
             new PacketMapping(0x0B, ProtocolVersion.MINECRAFT_1_19_4, false),
+            new PacketMapping(0x0D, ProtocolVersion.MINECRAFT_1_20_2, true),
         });
 
     this.commands.clear();

src/main/java/net/elytrium/limbohub/entities/NPC.java

@@ -110,7 +110,13 @@ public void spawn(LimboPlayer player) {
       );
     }
 
-    player.writePacketAndFlush(new SpawnPlayer(this.entityId, this.uuid, this.positionX, this.positionY, this.positionZ, this.yaw, this.pitch));
+    if (player.getProxyPlayer().getProtocolVersion().compareTo(ProtocolVersion.MINECRAFT_1_20_2) >= 0) {
+      player.writePacketAndFlush(new SpawnEntity(this.entityId, this.uuid, Player::getEntityType,
+          this.positionX, this.positionY, this.positionZ, this.pitch, this.yaw, this.yaw, 0));
+    } else {
+      player.writePacketAndFlush(new SpawnPlayer(this.entityId, this.uuid, this.positionX, this.positionY, this.positionZ, this.yaw, this.pitch));
+    }
+
     player.writePacketAndFlush(new SetHeadRotation(this.entityId, this.yaw));
     player.writePacketAndFlush(new ScoreboardTeam("sb" + this.entityId, (byte) 0, "never",
             "always", 0, Component.empty(), Component.empty(), List.of(this.username)));

src/main/java/net/elytrium/limbohub/protocol/entities/Player.java

@@ -24,6 +24,14 @@
 
 public class Player {
 
+  public static int getEntityType(ProtocolVersion version) {
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_20_2) >= 0) {
+      return 122;
+    } else {
+      throw new IllegalArgumentException("Player is not supported on versions below Minecraft 1.20.2");
+    }
+  }
+
   public static EntityMetadata buildSkinPartsMetadata(ProtocolVersion version, byte skinParts) {
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_17) >= 0) {
       return new EntityMetadata(Map.of((byte) 17, new EntityMetadataByteEntry(skinParts)));

src/main/java/net/elytrium/limbohub/protocol/packets/DisplayObjective.java

@@ -44,7 +44,12 @@ public void decode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersi
 
   @Override
   public void encode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion protocolVersion) {
-    buf.writeByte(this.position);
+    if (protocolVersion.compareTo(ProtocolVersion.MINECRAFT_1_20_2) >= 0) {
+      ProtocolUtils.writeVarInt(buf, this.position);
+    } else {
+      buf.writeByte(this.position);
+    }
+
     ProtocolUtils.writeString(buf, this.scoreName);
   }