Snapshot 20w21a

api/src/main/java/com/velocitypowered/api/network/ProtocolVersion.java

@@ -34,7 +34,8 @@ public enum ProtocolVersion {
   MINECRAFT_1_14_4(498, "1.14.4"),
   MINECRAFT_1_15(573, "1.15"),
   MINECRAFT_1_15_1(575, "1.15.1"),
-  MINECRAFT_1_15_2(578, "1.15.2");
+  MINECRAFT_1_15_2(578, "1.15.2"),
+  MINECRAFT_1_16(718, "1.16");
 
   private final int protocol;
   private final String name;

proxy/build.gradle

@@ -63,6 +63,7 @@ dependencies {
 
     compile 'it.unimi.dsi:fastutil:8.2.2'
     compile 'net.kyori:event-method-asm:3.0.0'
+    compile 'net.kyori:nbt:1.12-1.0.0-SNAPSHOT'
 
     compile 'com.mojang:brigadier:1.0.17'
 

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ClientPlaySessionHandler.java

@@ -337,10 +337,14 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
       int tempDim = joinGame.getDimension() == 0 ? -1 : 0;
       player.getMinecraftConnection().delayedWrite(
           new Respawn(tempDim, joinGame.getPartialHashedSeed(), joinGame.getDifficulty(),
-              joinGame.getGamemode(), joinGame.getLevelType()));
+              joinGame.getGamemode(), joinGame.getLevelType(), joinGame.getShouldKeepPlayerData(),
+                  joinGame.getIsDebug(), joinGame.getIsFlat(),
+                  joinGame.getDimensionRegistryName()));
       player.getMinecraftConnection().delayedWrite(
           new Respawn(joinGame.getDimension(), joinGame.getPartialHashedSeed(),
-              joinGame.getDifficulty(), joinGame.getGamemode(), joinGame.getLevelType()));
+              joinGame.getDifficulty(), joinGame.getGamemode(), joinGame.getLevelType(),
+                  joinGame.getShouldKeepPlayerData(), joinGame.getIsDebug(), joinGame.getIsFlat(),
+                  joinGame.getDimensionRegistryName()));
     }
 
     // Remove previous boss bars. These don't get cleared when sending JoinGame, thus the need to

proxy/src/main/java/com/velocitypowered/proxy/protocol/ProtocolUtils.java

@@ -6,13 +6,20 @@ import static com.google.common.base.Preconditions.checkState;
 import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.util.GameProfile;
 import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufInputStream;
+import io.netty.buffer.ByteBufOutputStream;
 import io.netty.buffer.ByteBufUtil;
 
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
 
+import net.kyori.nbt.CompoundTag;
+
 public enum ProtocolUtils {
   ;
   private static final int DEFAULT_MAX_STRING_SIZE = 65536; // 64KiB
@@ -153,6 +160,81 @@ public enum ProtocolUtils {
     buf.writeLong(uuid.getLeastSignificantBits());
   }
 
+  /**
+   * Reads an UUID stored as an Integer Array from the {@code buf}.
+   * @param buf the buffer to read from
+   * @return the UUID from the buffer
+   */
+  public static UUID readUuidIntArray(ByteBuf buf) {
+    long msbHigh = (long) buf.readInt() << 32;
+    long msbLow = (long) buf.readInt() & 0xFFFFFFFFL;
+    long msb = msbHigh | msbLow;
+    long lsbHigh = (long) buf.readInt() << 32;
+    long lsbLow = (long) buf.readInt() & 0xFFFFFFFFL;
+    long lsb = lsbHigh | lsbLow;
+    return new UUID(msb, lsb);
+  }
+
+  /**
+   * Writes an UUID as an Integer Array to the {@code buf}.
+   * @param buf the buffer to write to
+   * @param uuid the UUID to write
+   */
+  public static void writeUuidIntArray(ByteBuf buf, UUID uuid) {
+    buf.writeInt((int) (uuid.getMostSignificantBits() >> 32));
+    buf.writeInt((int) uuid.getMostSignificantBits());
+    buf.writeInt((int) (uuid.getLeastSignificantBits() >> 32));
+    buf.writeInt((int) uuid.getLeastSignificantBits());
+  }
+
+  /**
+   * Reads a {@link net.kyori.nbt.CompoundTag} from the {@code buf}.
+   * @param buf the buffer to read from
+   * @return {@link net.kyori.nbt.CompoundTag} the CompoundTag from the buffer
+   */
+  public static CompoundTag readCompoundTag(ByteBuf buf) {
+    int indexBefore = buf.readerIndex();
+    byte startType = buf.readByte();
+    if (startType == 0) {
+      return null;
+    } else {
+      buf.readerIndex(indexBefore);
+      try {
+        DataInput input = new ByteBufInputStream(buf);
+        byte type = input.readByte();
+        if (type != 10) {
+          return null;
+        }
+        input.readUTF();
+        CompoundTag ret = new CompoundTag();
+        ret.read(input, 0);
+        return ret;
+      } catch (IOException e) {
+        return null;
+      }
+    }
+  }
+
+  /**
+   * Writes a CompoundTag to the {@code buf}.
+   * @param buf the buffer to write to
+   * @param compoundTag the CompoundTag to write
+   */
+  public static void writeCompoundTag(ByteBuf buf, CompoundTag compoundTag) {
+    if (compoundTag == null) {
+      buf.writeByte(0);
+    } else {
+      try {
+        DataOutput output = new ByteBufOutputStream(buf);
+        output.writeByte(10);
+        output.writeUTF("");
+        compoundTag.write(output);
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+    }
+  }
+
   /**
    * Writes a list of {@link com.velocitypowered.api.util.GameProfile.Property} to the buffer.
    * @param buf the buffer to write to

proxy/src/main/java/com/velocitypowered/proxy/protocol/StateRegistry.java

@@ -6,6 +6,7 @@ import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_12_1;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_13;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_14;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_15;
+import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_16;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_8;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_9;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_9_4;
@@ -113,13 +114,15 @@ public enum StateRegistry {
           map(0x0C, MINECRAFT_1_12, false),
           map(0x0B, MINECRAFT_1_12_1, false),
           map(0x0E, MINECRAFT_1_13, false),
-          map(0x0F, MINECRAFT_1_14, false));
+          map(0x0F, MINECRAFT_1_14, false),
+          map(0x10, MINECRAFT_1_16, false));
       serverbound.register(ResourcePackResponse.class, ResourcePackResponse::new,
           map(0x19, MINECRAFT_1_8, false),
           map(0x16, MINECRAFT_1_9, false),
           map(0x18, MINECRAFT_1_12, false),
           map(0x1D, MINECRAFT_1_13, false),
-          map(0x1F, MINECRAFT_1_14, false));
+          map(0x1F, MINECRAFT_1_14, false),
+          map(0x20, MINECRAFT_1_16, false));
 
       clientbound.register(BossBar.class, BossBar::new,
           map(0x0C, MINECRAFT_1_9, false),

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/Chat.java

@@ -10,20 +10,25 @@ import net.kyori.text.Component;
 import net.kyori.text.serializer.gson.GsonComponentSerializer;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+import java.util.UUID;
+
 public class Chat implements MinecraftPacket {
 
   public static final byte CHAT_TYPE = (byte) 0;
   public static final int MAX_SERVERBOUND_MESSAGE_LENGTH = 256;
+  public static final UUID EMPTY_SENDER = new UUID(0, 0);
 
   private @Nullable String message;
   private byte type;
+  private UUID sender;
 
   public Chat() {
   }
 
-  public Chat(String message, byte type) {
+  public Chat(String message, byte type, UUID sender) {
     this.message = message;
     this.type = type;
+    this.sender = sender;
   }
 
   public String getMessage() {
@@ -45,11 +50,20 @@ public class Chat implements MinecraftPacket {
     this.type = type;
   }
 
+  public UUID getSenderUuid() {
+    return sender;
+  }
+
+  public void setSenderUuid(UUID sender) {
+    this.sender = sender;
+  }
+
   @Override
   public String toString() {
     return "Chat{"
         + "message='" + message + '\''
         + ", type=" + type
+        + ", sender=" + sender
         + '}';
   }
 
@@ -58,6 +72,9 @@ public class Chat implements MinecraftPacket {
     message = ProtocolUtils.readString(buf);
     if (direction == ProtocolUtils.Direction.CLIENTBOUND) {
       type = buf.readByte();
+      if(version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+        sender = ProtocolUtils.readUuid(buf);
+      }
     }
   }
 
@@ -69,6 +86,9 @@ public class Chat implements MinecraftPacket {
     ProtocolUtils.writeString(buf, message);
     if (direction == ProtocolUtils.Direction.CLIENTBOUND) {
       buf.writeByte(type);
+      if(version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+        ProtocolUtils.writeUuid(buf, sender == null ? new UUID(0,0) : sender);
+      }
     }
   }
 
@@ -78,15 +98,15 @@ public class Chat implements MinecraftPacket {
   }
 
   public static Chat createClientbound(Component component) {
-    return createClientbound(component, CHAT_TYPE);
+    return createClientbound(component, CHAT_TYPE, EMPTY_SENDER);
   }
 
-  public static Chat createClientbound(Component component, byte type) {
+  public static Chat createClientbound(Component component, byte type, UUID sender) {
     Preconditions.checkNotNull(component, "component");
-    return new Chat(GsonComponentSerializer.INSTANCE.serialize(component), type);
+    return new Chat(GsonComponentSerializer.INSTANCE.serialize(component), type, sender);
   }
 
   public static Chat createServerbound(String message) {
-    return new Chat(message, CHAT_TYPE);
+    return new Chat(message, CHAT_TYPE, EMPTY_SENDER);
   }
 }

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/JoinGame.java

@@ -5,6 +5,7 @@ import com.velocitypowered.proxy.connection.MinecraftSessionHandler;
 import com.velocitypowered.proxy.protocol.MinecraftPacket;
 import com.velocitypowered.proxy.protocol.ProtocolUtils;
 import io.netty.buffer.ByteBuf;
+import net.kyori.nbt.CompoundTag;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public class JoinGame implements MinecraftPacket {
@@ -19,6 +20,11 @@ public class JoinGame implements MinecraftPacket {
   private int viewDistance; //1.14+
   private boolean reducedDebugInfo;
   private boolean showRespawnScreen;
+  private boolean shouldKeepPlayerData;
+  private boolean isDebug;
+  private boolean isFlat;
+  private String dimensionRegistryName;
+  private CompoundTag dimensionRegistry;
 
   public int getEntityId() {
     return entityId;
@@ -91,6 +97,46 @@ public class JoinGame implements MinecraftPacket {
     this.reducedDebugInfo = reducedDebugInfo;
   }
 
+  public boolean getShouldKeepPlayerData() {
+    return shouldKeepPlayerData;
+  }
+
+  public void setShouldKeepPlayerData(boolean shouldKeepPlayerData) {
+    this.shouldKeepPlayerData = shouldKeepPlayerData;
+  }
+
+  public boolean getIsDebug() {
+    return isDebug;
+  }
+
+  public void setIsDebug(boolean isDebug) {
+    this.isDebug = isDebug;
+  }
+
+  public boolean getIsFlat() {
+    return isFlat;
+  }
+
+  public void setIsFlat(boolean isFlat) {
+    this.isFlat = isFlat;
+  }
+
+  public String getDimensionRegistryName() {
+    return dimensionRegistryName;
+  }
+
+  public void setDimensionRegistryName(String dimensionRegistryName) {
+    this.dimensionRegistryName = dimensionRegistryName;
+  }
+
+  public CompoundTag getDimensionRegistry() {
+    return dimensionRegistry;
+  }
+
+  public void setDimensionRegistry(CompoundTag dimensionRegistry) {
+    this.dimensionRegistry = dimensionRegistry;
+  }
+
   @Override
   public String toString() {
     return "JoinGame{"
@@ -110,10 +156,15 @@ public class JoinGame implements MinecraftPacket {
   public void decode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion version) {
     this.entityId = buf.readInt();
     this.gamemode = buf.readUnsignedByte();
-    if (version.compareTo(ProtocolVersion.MINECRAFT_1_9_1) >= 0) {
-      this.dimension = buf.readInt();
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      this.dimensionRegistry = ProtocolUtils.readCompoundTag(buf);
+      this.dimensionRegistryName = ProtocolUtils.readString(buf);
     } else {
-      this.dimension = buf.readByte();
+      if (version.compareTo(ProtocolVersion.MINECRAFT_1_9_1) >= 0) {
+        this.dimension = buf.readInt();
+      } else {
+        this.dimension = buf.readByte();
+      }
     }
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_13_2) <= 0) {
       this.difficulty = buf.readUnsignedByte();
@@ -122,7 +173,11 @@ public class JoinGame implements MinecraftPacket {
       this.partialHashedSeed = buf.readLong();
     }
     this.maxPlayers = buf.readUnsignedByte();
-    this.levelType = ProtocolUtils.readString(buf, 16);
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) < 0) {
+      this.levelType = ProtocolUtils.readString(buf, 16);
+    } else {
+      this.levelType = "default"; // I didn't have the courage to rework this yet.
+    }
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_14) >= 0) {
       this.viewDistance = ProtocolUtils.readVarInt(buf);
     }
@@ -130,16 +185,25 @@ public class JoinGame implements MinecraftPacket {
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_15) >= 0) {
       this.showRespawnScreen = buf.readBoolean();
     }
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      isDebug = buf.readBoolean();
+      isFlat = buf.readBoolean();
+    }
   }
 
   @Override
   public void encode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion version) {
     buf.writeInt(entityId);
     buf.writeByte(gamemode);
-    if (version.compareTo(ProtocolVersion.MINECRAFT_1_9_1) >= 0) {
-      buf.writeInt(dimension);
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      ProtocolUtils.writeCompoundTag(buf, dimensionRegistry);
+      ProtocolUtils.writeString(buf, dimensionRegistryName);
     } else {
-      buf.writeByte(dimension);
+      if (version.compareTo(ProtocolVersion.MINECRAFT_1_9_1) >= 0) {
+        buf.writeInt(dimension);
+      } else {
+        buf.writeByte(dimension);
+      }
     }
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_13_2) <= 0) {
       buf.writeByte(difficulty);
@@ -148,10 +212,12 @@ public class JoinGame implements MinecraftPacket {
       buf.writeLong(partialHashedSeed);
     }
     buf.writeByte(maxPlayers);
-    if (levelType == null) {
-      throw new IllegalStateException("No level type specified.");
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) < 0) {
+      if (levelType == null) {
+        throw new IllegalStateException("No level type specified.");
+      }
+      ProtocolUtils.writeString(buf, levelType);
     }
-    ProtocolUtils.writeString(buf, levelType);
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_14) >= 0) {
       ProtocolUtils.writeVarInt(buf,viewDistance);
     }
@@ -159,6 +225,10 @@ public class JoinGame implements MinecraftPacket {
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_15) >= 0) {
       buf.writeBoolean(showRespawnScreen);
     }
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      buf.writeBoolean(isDebug);
+      buf.writeBoolean(isFlat);
+    }
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/Respawn.java

@@ -13,17 +13,25 @@ public class Respawn implements MinecraftPacket {
   private short difficulty;
   private short gamemode;
   private String levelType = "";
+  private boolean shouldKeepPlayerData;
+  private boolean isDebug;
+  private boolean isFlat;
+  private String dimensionRegistryName;
 
   public Respawn() {
   }
 
   public Respawn(int dimension, long partialHashedSeed, short difficulty, short gamemode,
-      String levelType) {
+      String levelType, boolean shouldKeepPlayerData, boolean isDebug, boolean isFlat, String dimensionRegistryName) {
     this.dimension = dimension;
     this.partialHashedSeed = partialHashedSeed;
     this.difficulty = difficulty;
     this.gamemode = gamemode;
     this.levelType = levelType;
+    this.shouldKeepPlayerData = shouldKeepPlayerData;
+    this.isDebug = isDebug;
+    this.isFlat = isFlat;
+    this.dimensionRegistryName = dimensionRegistryName;
   }
 
   public int getDimension() {
@@ -66,6 +74,38 @@ public class Respawn implements MinecraftPacket {
     this.levelType = levelType;
   }
 
+  public boolean getShouldKeepPlayerData() {
+    return shouldKeepPlayerData;
+  }
+
+  public void setShouldKeepPlayerData(boolean shouldKeepPlayerData) {
+    this.shouldKeepPlayerData = shouldKeepPlayerData;
+  }
+
+  public boolean getIsDebug() {
+    return isDebug;
+  }
+
+  public void setIsDebug(boolean isDebug) {
+    this.isDebug = isDebug;
+  }
+
+  public boolean getIsFlat() {
+    return isFlat;
+  }
+
+  public void setIsFlat(boolean isFlat) {
+    this.isFlat = isFlat;
+  }
+
+  public String getDimensionRegistryName() {
+    return dimensionRegistryName;
+  }
+
+  public void setDimensionRegistryName(String dimensionRegistryName) {
+    this.dimensionRegistryName = dimensionRegistryName;
+  }
+
   @Override
   public String toString() {
     return "Respawn{"
@@ -74,12 +114,20 @@ public class Respawn implements MinecraftPacket {
         + ", difficulty=" + difficulty
         + ", gamemode=" + gamemode
         + ", levelType='" + levelType + '\''
+        + ", shouldKeepPlayerData=" + shouldKeepPlayerData
+        + ", isDebug=" + isDebug
+        + ", isFlat='" + isFlat
+        + ", dimensionRegistryName='" + dimensionRegistryName + '\''
         + '}';
   }
 
   @Override
   public void decode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion version) {
-    this.dimension = buf.readInt();
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      this.dimensionRegistryName = ProtocolUtils.readString(buf); // Not sure what the cap on that is
+    } else {
+      this.dimension = buf.readInt();
+    }
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_13_2) <= 0) {
       this.difficulty = buf.readUnsignedByte();
     }
@@ -87,12 +135,22 @@ public class Respawn implements MinecraftPacket {
       this.partialHashedSeed = buf.readLong();
     }
     this.gamemode = buf.readUnsignedByte();
-    this.levelType = ProtocolUtils.readString(buf, 16);
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      isDebug = buf.readBoolean();
+      isFlat = buf.readBoolean();
+      shouldKeepPlayerData = buf.readBoolean();
+    } else {
+      this.levelType = ProtocolUtils.readString(buf, 16);
+    }
   }
 
   @Override
   public void encode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion version) {
-    buf.writeInt(dimension);
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      ProtocolUtils.writeString(buf, dimensionRegistryName);
+    } else {
+      buf.writeInt(dimension);
+    }
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_13_2) <= 0) {
       buf.writeByte(difficulty);
     }
@@ -100,7 +158,13 @@ public class Respawn implements MinecraftPacket {
       buf.writeLong(partialHashedSeed);
     }
     buf.writeByte(gamemode);
-    ProtocolUtils.writeString(buf, levelType);
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      buf.writeBoolean(isDebug);
+      buf.writeBoolean(isFlat);
+      buf.writeBoolean(shouldKeepPlayerData);
+    } else {
+      ProtocolUtils.writeString(buf, levelType);
+    }
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/ServerLoginSuccess.java

@@ -45,7 +45,11 @@ public class ServerLoginSuccess implements MinecraftPacket {
 
   @Override
   public void decode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion version) {
-    uuid = UUID.fromString(ProtocolUtils.readString(buf, 36));
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      uuid = ProtocolUtils.readUuidIntArray(buf);
+    } else {
+      uuid = UUID.fromString(ProtocolUtils.readString(buf, 36));
+    }
     username = ProtocolUtils.readString(buf, 16);
   }
 
@@ -54,7 +58,11 @@ public class ServerLoginSuccess implements MinecraftPacket {
     if (uuid == null) {
       throw new IllegalStateException("No UUID specified!");
     }
-    ProtocolUtils.writeString(buf, uuid.toString());
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      ProtocolUtils.writeUuidIntArray(buf, uuid);
+    } else {
+      ProtocolUtils.writeString(buf, uuid.toString());
+    }
     if (username == null) {
       throw new IllegalStateException("No username specified!");
     }

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/brigadier/ArgumentPropertyRegistry.java

@@ -134,5 +134,6 @@ public class ArgumentPropertyRegistry {
     dummy("minecraft:int_range", DUMMY);
     dummy("minecraft:float_range", DUMMY);
     dummy("minecraft:time", DUMMY); // added in 1.14
+    dummy("minecraft:uuid", DUMMY);
   }
 }