Start of extended world height support

connector/src/main/java/org/geysermc/connector/configuration/GeyserConfiguration.java

@@ -45,6 +45,8 @@ public interface GeyserConfiguration {
 
     Map<String, ? extends IUserAuthenticationInfo> getUserAuths();
 
+    boolean isExtendedWorldHeight();
+
     boolean isCommandSuggestions();
 
     @JsonIgnore

connector/src/main/java/org/geysermc/connector/configuration/GeyserJacksonConfiguration.java

@@ -55,6 +55,9 @@ public abstract class GeyserJacksonConfiguration implements GeyserConfiguration
     private BedrockConfiguration bedrock = new BedrockConfiguration();
     private RemoteConfiguration remote = new RemoteConfiguration();
 
+    @JsonProperty("extended-world-height")
+    private boolean extendedWorldHeight = false;
+
     @JsonProperty("floodgate-key-file")
     private String floodgateKeyFile = "public-key.pem";
 

connector/src/main/java/org/geysermc/connector/network/BedrockProtocol.java

@@ -28,6 +28,7 @@ package org.geysermc.connector.network;
 import com.nukkitx.protocol.bedrock.BedrockPacketCodec;
 import com.nukkitx.protocol.bedrock.v440.Bedrock_v440;
 import com.nukkitx.protocol.bedrock.v448.Bedrock_v448;
+import org.geysermc.connector.GeyserConnector;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -40,15 +41,17 @@ public class BedrockProtocol {
      * Default Bedrock codec that should act as a fallback. Should represent the latest available
      * release of the game that Geyser supports.
      */
-    public static final BedrockPacketCodec DEFAULT_BEDROCK_CODEC = Bedrock_v440.V440_CODEC;
+    public static final BedrockPacketCodec DEFAULT_BEDROCK_CODEC = Bedrock_v448.V448_CODEC;
     /**
      * A list of all supported Bedrock versions that can join Geyser
      */
     public static final List<BedrockPacketCodec> SUPPORTED_BEDROCK_CODECS = new ArrayList<>();
 
     static {
+        if (!GeyserConnector.getInstance().getConfig().isExtendedWorldHeight()) {
+            SUPPORTED_BEDROCK_CODECS.add(Bedrock_v440.V440_CODEC);
+        }
         SUPPORTED_BEDROCK_CODECS.add(DEFAULT_BEDROCK_CODEC);
-        SUPPORTED_BEDROCK_CODECS.add(Bedrock_v448.V448_CODEC);
     }
 
     /**

connector/src/main/java/org/geysermc/connector/network/UpstreamPacketHandler.java

@@ -137,6 +137,11 @@ public class UpstreamPacketHandler extends LoggingPacketHandler {
                     stackPacket.getExperiments().add(new ExperimentData("data_driven_items", true));
                 }
 
+                if (session.getConnector().getConfig().isExtendedWorldHeight()) {
+                    // Allow extended world height in the overworld to work
+                    stackPacket.getExperiments().add(new ExperimentData("caves_and_cliffs", true));
+                }
+
                 session.sendUpstreamPacket(stackPacket);
                 break;
 

connector/src/main/java/org/geysermc/connector/network/session/GeyserSession.java

@@ -1070,6 +1070,10 @@ public class GeyserSession implements CommandSender {
         settings.setServerAuthoritativeBlockBreaking(false);
         startGamePacket.setPlayerMovementSettings(settings);
 
+        if (connector.getConfig().isExtendedWorldHeight()) {
+            startGamePacket.getExperiments().add(new ExperimentData("caves_and_cliffs", true));
+        }
+
         upstream.sendPacket(startGamePacket);
     }
 
@@ -1191,11 +1195,7 @@ public class GeyserSession implements CommandSender {
      * @param packet the bedrock packet from the NukkitX protocol lib
      */
     public void sendUpstreamPacket(BedrockPacket packet) {
-        if (upstream != null) {
         upstream.sendPacket(packet);
-        } else {
-            connector.getLogger().debug("Tried to send upstream packet " + packet.getClass().getSimpleName() + " but the session was null");
-        }
     }
 
     /**
@@ -1204,11 +1204,7 @@ public class GeyserSession implements CommandSender {
      * @param packet the bedrock packet from the NukkitX protocol lib
      */
     public void sendUpstreamPacketImmediately(BedrockPacket packet) {
-        if (upstream != null) {
         upstream.sendPacketImmediately(packet);
-        } else {
-            connector.getLogger().debug("Tried to send upstream packet " + packet.getClass().getSimpleName() + " immediately but the session was null");
-        }
     }
 
     /**

connector/src/main/java/org/geysermc/connector/network/session/UpstreamSession.java

@@ -41,6 +41,7 @@ public class UpstreamSession {
     private boolean initialized = false;
 
     public void sendPacket(@NonNull BedrockPacket packet) {
+        System.out.println(packet);
         if (!isClosed()) {
             session.sendPacket(packet);
         }

connector/src/main/java/org/geysermc/connector/network/translators/bedrock/entity/player/BedrockMovePlayerTranslator.java

@@ -33,6 +33,7 @@ import com.nukkitx.math.vector.Vector3d;
 import com.nukkitx.math.vector.Vector3f;
 import com.nukkitx.protocol.bedrock.packet.MoveEntityAbsolutePacket;
 import com.nukkitx.protocol.bedrock.packet.MovePlayerPacket;
+import org.geysermc.connector.GeyserConnector;
 import org.geysermc.connector.common.ChatColor;
 import org.geysermc.connector.entity.player.PlayerEntity;
 import org.geysermc.connector.entity.type.EntityType;
@@ -42,6 +43,14 @@ import org.geysermc.connector.network.translators.Translator;
 
 @Translator(packet = MovePlayerPacket.class)
 public class BedrockMovePlayerTranslator extends PacketTranslator<MovePlayerPacket> {
+    /* The upper and lower bounds to check for the void floor that only exists in Bedrock */
+    private static final int BEDROCK_VOID_FLOOR_UPPER_Y;
+    private static final int BEDROCK_VOID_FLOOR_LOWER_Y;
+
+    static {
+        BEDROCK_VOID_FLOOR_LOWER_Y = GeyserConnector.getInstance().getConfig().isExtendedWorldHeight() ? -104 : -40;
+        BEDROCK_VOID_FLOOR_UPPER_Y = BEDROCK_VOID_FLOOR_LOWER_Y + 2;
+    }
 
     @Override
     public void translate(MovePlayerPacket packet, GeyserSession session) {
@@ -108,7 +117,7 @@ public class BedrockMovePlayerTranslator extends PacketTranslator<MovePlayerPack
 
                         if (notMovingUp) {
                             int floorY = position.getFloorY();
-                            if (floorY <= -38 && floorY >= -40) {
+                            if (floorY <= BEDROCK_VOID_FLOOR_LOWER_Y && floorY >= BEDROCK_VOID_FLOOR_UPPER_Y) {
                                 // Work around there being a floor at Y -40 and teleport the player below it
                                 // Moving from below Y -40 to above the void floor works fine
                                 //TODO: This will need to be changed for 1.17

connector/src/main/java/org/geysermc/connector/registry/populator/BlockRegistryPopulator.java

@@ -52,8 +52,15 @@ import java.util.function.BiFunction;
 import java.util.zip.GZIPInputStream;
 
 public class BlockRegistryPopulator {
-    private static final ImmutableMap<String, BiFunction<String, NbtMapBuilder, String>> STATE_MAPPER = ImmutableMap.<String, BiFunction<String, NbtMapBuilder, String>>builder()
-            .put("1_17_0", (bedrockIdentifier, statesBuilder) -> {
+    private static final ImmutableMap<String, BiFunction<String, NbtMapBuilder, String>> STATE_MAPPER;
+
+    private static final Object2IntMap<String> PALETTE_VERSIONS;
+
+    static {
+        ImmutableMap.Builder<String, BiFunction<String, NbtMapBuilder, String>> stateMapperBuilder = ImmutableMap.<String, BiFunction<String, NbtMapBuilder, String>>builder()
+                .put("1_17_10", (bedrockIdentifier, statesBuilder) -> null);
+        if (!GeyserConnector.getInstance().getConfig().isExtendedWorldHeight()) {
+            stateMapperBuilder.put("1_17_0", (bedrockIdentifier, statesBuilder) -> {
                 if (bedrockIdentifier.contains("candle")) {
                     // Replace candles with sea pickles or cake
                     if (bedrockIdentifier.contains("cake")) {
@@ -67,16 +74,16 @@ public class BlockRegistryPopulator {
                     }
                 }
                 return null;
-            })
-            .put("1_17_10", (bedrockIdentifier, statesBuilder) -> null)
-            .build();
-
-    private static final Object2IntMap<String> PALETTE_VERSIONS = new Object2IntOpenHashMap<String>() {
-        {
-            put("1_17_0", Bedrock_v440.V440_CODEC.getProtocolVersion());
-            put("1_17_10", Bedrock_v448.V448_CODEC.getProtocolVersion());
+            });
+        }
+        STATE_MAPPER = stateMapperBuilder.build();
+
+        PALETTE_VERSIONS = new Object2IntOpenHashMap<>();
+        if (!GeyserConnector.getInstance().getConfig().isExtendedWorldHeight()) {
+            PALETTE_VERSIONS.put("1_17_0", Bedrock_v440.V440_CODEC.getProtocolVersion());
+        }
+        PALETTE_VERSIONS.put("1_17_10", Bedrock_v448.V448_CODEC.getProtocolVersion());
     }
-    };
 
     /**
      * Stores the raw blocks JSON until it is no longer needed.

connector/src/main/java/org/geysermc/connector/registry/populator/ItemRegistryPopulator.java

@@ -57,9 +57,15 @@ import java.io.InputStream;
 import java.util.*;
 
 public class ItemRegistryPopulator {
-    private static final Map<String, PaletteVersion> PALETTE_VERSIONS = new Object2ObjectOpenHashMap<String, PaletteVersion>(){
-        {
-            put("1_17_0", new PaletteVersion(Bedrock_v440.V440_CODEC.getProtocolVersion(), new Object2ObjectOpenHashMap<String, String>() {
+    private static final Map<String, PaletteVersion> PALETTE_VERSIONS;
+
+    static {
+        PALETTE_VERSIONS = new Object2ObjectOpenHashMap<>();
+        if (GeyserConnector.getInstance().getConfig().isExtendedWorldHeight()) {
+            // Required to send the full palette or else the client crashes
+            PALETTE_VERSIONS.put("1_17_10.caves_and_cliffs", new PaletteVersion(Bedrock_v448.V448_CODEC.getProtocolVersion(), Collections.emptyMap()));
+        } else {
+            PALETTE_VERSIONS.put("1_17_0", new PaletteVersion(Bedrock_v440.V440_CODEC.getProtocolVersion(), new Object2ObjectOpenHashMap<String, String>() {
                 {
                     put("minecraft:candle", "minecraft:sea_pickle");
                     put("minecraft:white_candle", "minecraft:sea_pickle");
@@ -80,9 +86,9 @@ public class ItemRegistryPopulator {
                     put("minecraft:black_candle", "minecraft:sea_pickle");
                 }
             }));
-            put("1_17_10", new PaletteVersion(Bedrock_v448.V448_CODEC.getProtocolVersion(), Collections.emptyMap()));
+            PALETTE_VERSIONS.put("1_17_10", new PaletteVersion(Bedrock_v448.V448_CODEC.getProtocolVersion(), Collections.emptyMap()));
+        }
     }
-    };
 
     @Getter
     @AllArgsConstructor

connector/src/main/java/org/geysermc/connector/utils/ChunkUtils.java

@@ -71,11 +71,11 @@ public class ChunkUtils {
     /**
      * The minimum height Bedrock Edition will accept.
      */
-    private static final int MINIMUM_ACCEPTED_HEIGHT = 0;
+    private static final int MINIMUM_ACCEPTED_HEIGHT = GeyserConnector.getInstance().getConfig().isExtendedWorldHeight() ? -64 : 0;
     /**
-     * The maximum height Bedrock Edition will accept.
+     * The maximum chunk height Bedrock Edition will accept, from the lowest point to the highest.
      */
-    private static final int MAXIMUM_ACCEPTED_HEIGHT = 256;
+    private static final int MAXIMUM_ACCEPTED_HEIGHT = GeyserConnector.getInstance().getConfig().isExtendedWorldHeight() ? 380 : 256;
 
     private static int indexYZXtoXZY(int yzx) {
         return (yzx >> 8) | (yzx & 0x0F0) | ((yzx & 0x00F) << 8);
@@ -92,7 +92,7 @@ public class ChunkUtils {
         BitSet pistonOrFlowerPaletteIds = new BitSet();
 
         for (int sectionY = 0; sectionY < javaSections.length; sectionY++) {
-            if (yOffset < 0 && sectionY < -yOffset) {
+            if (yOffset < MINIMUM_ACCEPTED_HEIGHT && sectionY < -yOffset) {
                 // Ignore this chunk since it goes below the accepted height limit
                 continue;
             }

connector/src/main/resources/config.yml

@@ -57,6 +57,11 @@ remote:
   # This is designed to be used for forced hosts on proxies
   forward-hostname: false
 
+# Allows the overworld world height to be extended from 0 - 255 to -64 - 320. This option cannot be changed during a reload.
+# 1.17.0-1.17.2 Bedrock clients cannot connect with this option enabled.
+# Performance issues may occur for Bedrock clients as this is an experimental toggle on their end.
+extended-world-height: false
+
 # Floodgate uses encryption to ensure use from authorised sources.
 # This should point to the public key generated by Floodgate (BungeeCord, Spigot or Velocity)
 # You can ignore this when not using Floodgate.