From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: stonar96 Date: Mon, 20 Aug 2018 03:03:58 +0200 Subject: [PATCH] Anti-Xray diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java index a91a7d8f56a068b18d50a8b987b71510b0a19d5b..b8ca1f73b2451307c3711076eaa43e2adb34d92e 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -1,7 +1,9 @@ package com.destroystokyo.paper; +import java.util.Arrays; import java.util.List; +import com.destroystokyo.paper.antixray.ChunkPacketBlockControllerAntiXray.EngineMode; import org.bukkit.Bukkit; import org.bukkit.configuration.file.YamlConfiguration; import org.spigotmc.SpigotWorldConfig; @@ -484,5 +486,40 @@ public class PaperWorldConfig { private void lightQueueSize() { lightQueueSize = getInt("light-queue-size", lightQueueSize); } + + public boolean antiXray; + public EngineMode engineMode; + public int maxBlockHeight; + public int updateRadius; + public boolean lavaObscures; + public boolean usePermission; + public List hiddenBlocks; + public List replacementBlocks; + private void antiXray() { + antiXray = getBoolean("anti-xray.enabled", false); + engineMode = EngineMode.getById(getInt("anti-xray.engine-mode", EngineMode.HIDE.getId())); + engineMode = engineMode == null ? EngineMode.HIDE : engineMode; + maxBlockHeight = getInt("anti-xray.max-block-height", 64); + updateRadius = getInt("anti-xray.update-radius", 2); + lavaObscures = getBoolean("anti-xray.lava-obscures", false); + usePermission = getBoolean("anti-xray.use-permission", false); + hiddenBlocks = getList("anti-xray.hidden-blocks", Arrays.asList("copper_ore", "deepslate_copper_ore", "gold_ore", "deepslate_gold_ore", "iron_ore", "deepslate_iron_ore", + "coal_ore", "deepslate_coal_ore", "lapis_ore", "deepslate_lapis_ore", "mossy_cobblestone", "obsidian", "chest", "diamond_ore", "deepslate_diamond_ore", + "redstone_ore", "deepslate_redstone_ore", "clay", "emerald_ore", "deepslate_emerald_ore", "ender_chest")); + replacementBlocks = getList("anti-xray.replacement-blocks", Arrays.asList("stone", "oak_planks")); + if (PaperConfig.version < 19) { + hiddenBlocks.remove("lit_redstone_ore"); + int index = replacementBlocks.indexOf("planks"); + if (index != -1) { + replacementBlocks.set(index, "oak_planks"); + } + set("anti-xray.hidden-blocks", hiddenBlocks); + set("anti-xray.replacement-blocks", replacementBlocks); + } + log("Anti-Xray: " + (antiXray ? "enabled" : "disabled") + " / Engine Mode: " + engineMode.getDescription() + " / Up to " + ((maxBlockHeight >> 4) << 4) + " blocks / Update Radius: " + updateRadius); + if (antiXray && usePermission) { + Bukkit.getLogger().warning("You have enabled permission-based Anti-Xray checking - depending on your permission plugin, this may cause performance issues"); + } + } } diff --git a/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockController.java b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockController.java new file mode 100644 index 0000000000000000000000000000000000000000..55e1c448999d79ddd9781d6f8ff2899807802146 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockController.java @@ -0,0 +1,45 @@ +package com.destroystokyo.paper.antixray; + +import net.minecraft.core.BlockPos; +import net.minecraft.core.Direction; +import net.minecraft.network.protocol.game.ClientboundLevelChunkPacket; +import net.minecraft.server.level.ServerPlayer; +import net.minecraft.server.level.ServerPlayerGameMode; +import net.minecraft.world.level.Level; +import net.minecraft.world.level.block.state.BlockState; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.LevelChunk; +import net.minecraft.world.level.chunk.LevelChunkSection; + +public class ChunkPacketBlockController { + + public static final ChunkPacketBlockController NO_OPERATION_INSTANCE = new ChunkPacketBlockController(); + + protected ChunkPacketBlockController() { + + } + + public BlockState[] getPredefinedBlockData(Level world, ChunkAccess chunk, LevelChunkSection chunkSection, boolean initializeBlocks) { + return null; + } + + public boolean shouldModify(ServerPlayer entityPlayer, LevelChunk chunk) { + return false; + } + + public ChunkPacketInfo getChunkPacketInfo(ClientboundLevelChunkPacket chunkPacket, LevelChunk chunk) { + return null; + } + + public void modifyBlocks(ClientboundLevelChunkPacket chunkPacket, ChunkPacketInfo chunkPacketInfo) { + chunkPacket.setReady(true); + } + + public void onBlockChange(Level world, BlockPos blockPosition, BlockState newBlockData, BlockState oldBlockData, int flag) { + + } + + public void onPlayerLeftClickBlock(ServerPlayerGameMode playerInteractManager, BlockPos blockPosition, Direction enumDirection) { + + } +} diff --git a/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java new file mode 100644 index 0000000000000000000000000000000000000000..c69332299015d90345636cf0f4425db62068f978 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java @@ -0,0 +1,644 @@ +package com.destroystokyo.paper.antixray; + +import java.util.ArrayList; +import java.util.LinkedHashSet; +import java.util.LinkedList; +import java.util.List; +import java.util.Set; +import java.util.concurrent.Executor; +import java.util.concurrent.ThreadLocalRandom; +import java.util.function.IntSupplier; +import net.minecraft.core.BlockPos; +import net.minecraft.core.Direction; +import net.minecraft.core.Registry; +import net.minecraft.network.protocol.game.ClientboundLevelChunkPacket; +import net.minecraft.resources.ResourceLocation; +import net.minecraft.server.MinecraftServer; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.server.level.ServerPlayer; +import net.minecraft.server.level.ServerPlayerGameMode; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.Level; +import net.minecraft.world.level.block.Block; +import net.minecraft.world.level.block.Blocks; +import net.minecraft.world.level.block.state.BlockState; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.EmptyLevelChunk; +import net.minecraft.world.level.chunk.LevelChunk; +import net.minecraft.world.level.chunk.LevelChunkSection; +import net.minecraft.world.level.chunk.Palette; +import org.bukkit.Bukkit; +import org.bukkit.World.Environment; + +import com.destroystokyo.paper.PaperWorldConfig; + +public final class ChunkPacketBlockControllerAntiXray extends ChunkPacketBlockController { + + private final Executor executor; + private final EngineMode engineMode; + private final int worldSectionHeight; + private final int maxChunkSectionIndex; + private final int updateRadius; + private final boolean usePermission; + private final BlockState[] predefinedBlockData; + private final BlockState[] predefinedBlockDataFull; + private final BlockState[] predefinedBlockDataStone; + private final BlockState[] predefinedBlockDataNetherrack; + private final BlockState[] predefinedBlockDataEndStone; + private final int[] predefinedBlockDataBitsGlobal; + private final int[] predefinedBlockDataBitsStoneGlobal; + private final int[] predefinedBlockDataBitsNetherrackGlobal; + private final int[] predefinedBlockDataBitsEndStoneGlobal; + private final boolean[] solidGlobal = new boolean[Block.BLOCK_STATE_REGISTRY.size()]; + private final boolean[] obfuscateGlobal = new boolean[Block.BLOCK_STATE_REGISTRY.size()]; + private final LevelChunkSection[] emptyNearbyChunkSections = {LevelChunk.EMPTY_SECTION, LevelChunk.EMPTY_SECTION, LevelChunk.EMPTY_SECTION, LevelChunk.EMPTY_SECTION}; + private final int maxBlockYUpdatePosition; + + public ChunkPacketBlockControllerAntiXray(Level world, Executor executor) { + PaperWorldConfig paperWorldConfig = world.paperConfig; + engineMode = paperWorldConfig.engineMode; + + int minSection = world.getMinSection(); + worldSectionHeight = world.getSectionsCount(); + maxChunkSectionIndex = (paperWorldConfig.maxBlockHeight >> 4) - minSection; + updateRadius = paperWorldConfig.updateRadius; + usePermission = paperWorldConfig.usePermission; + + this.executor = executor; + + List toObfuscate; + + if (engineMode == EngineMode.HIDE) { + toObfuscate = paperWorldConfig.hiddenBlocks; + predefinedBlockData = null; + predefinedBlockDataFull = null; + predefinedBlockDataStone = new BlockState[] {Blocks.STONE.defaultBlockState()}; + predefinedBlockDataNetherrack = new BlockState[] {Blocks.NETHERRACK.defaultBlockState()}; + predefinedBlockDataEndStone = new BlockState[] {Blocks.END_STONE.defaultBlockState()}; + predefinedBlockDataBitsGlobal = null; + predefinedBlockDataBitsStoneGlobal = new int[] {LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.STONE.defaultBlockState())}; + predefinedBlockDataBitsNetherrackGlobal = new int[] {LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.NETHERRACK.defaultBlockState())}; + predefinedBlockDataBitsEndStoneGlobal = new int[] {LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.END_STONE.defaultBlockState())}; + } else { + toObfuscate = new ArrayList<>(paperWorldConfig.replacementBlocks); + List predefinedBlockDataList = new LinkedList(); + + for (String id : paperWorldConfig.hiddenBlocks) { + Block block = Registry.BLOCK.getOptional(new ResourceLocation(id)).orElse(null); + + if (block != null && !(block instanceof net.minecraft.world.level.block.EntityBlock)) { + toObfuscate.add(id); + predefinedBlockDataList.add(block.defaultBlockState()); + } + } + + // The doc of the LinkedHashSet(Collection c) constructor doesn't specify that the insertion order is the predictable iteration order of the specified Collection, although it is in the implementation + Set predefinedBlockDataSet = new LinkedHashSet<>(predefinedBlockDataList); + // Therefore addAll(Collection c) is used, which guarantees this order in the doc + predefinedBlockData = predefinedBlockDataSet.isEmpty() ? new BlockState[] {Blocks.DIAMOND_ORE.defaultBlockState()} : predefinedBlockDataSet.toArray(new BlockState[0]); + predefinedBlockDataFull = predefinedBlockDataSet.isEmpty() ? new BlockState[] {Blocks.DIAMOND_ORE.defaultBlockState()} : predefinedBlockDataList.toArray(new BlockState[0]); + predefinedBlockDataStone = null; + predefinedBlockDataNetherrack = null; + predefinedBlockDataEndStone = null; + predefinedBlockDataBitsGlobal = new int[predefinedBlockDataFull.length]; + + for (int i = 0; i < predefinedBlockDataFull.length; i++) { + predefinedBlockDataBitsGlobal[i] = LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(predefinedBlockDataFull[i]); + } + + predefinedBlockDataBitsStoneGlobal = null; + predefinedBlockDataBitsNetherrackGlobal = null; + predefinedBlockDataBitsEndStoneGlobal = null; + } + + for (String id : toObfuscate) { + Block block = Registry.BLOCK.getOptional(new ResourceLocation(id)).orElse(null); + + // Don't obfuscate air because air causes unnecessary block updates and causes block updates to fail in the void + if (block != null && !block.defaultBlockState().isAir()) { + // Replace all block states of a specified block + for (BlockState blockData : block.getStateDefinition().getPossibleStates()) { + obfuscateGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(blockData)] = true; + } + } + } + + EmptyLevelChunk emptyChunk = new EmptyLevelChunk(world, new ChunkPos(0, 0)); + BlockPos zeroPos = new BlockPos(0, 0, 0); + + for (int i = 0; i < solidGlobal.length; i++) { + BlockState blockData = LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.valueFor(i); + + if (blockData != null) { + solidGlobal[i] = blockData.isRedstoneConductor(emptyChunk, zeroPos) + && blockData.getBlock() != Blocks.SPAWNER && blockData.getBlock() != Blocks.BARRIER && blockData.getBlock() != Blocks.SHULKER_BOX && blockData.getBlock() != Blocks.SLIME_BLOCK || paperWorldConfig.lavaObscures && blockData == Blocks.LAVA.defaultBlockState(); + // Comparing blockData == Blocks.LAVA.getBlockData() instead of blockData.getBlock() == Blocks.LAVA ensures that only "stationary lava" is used + // shulker box checks TE. + } + } + + this.maxBlockYUpdatePosition = (maxChunkSectionIndex + 1) * 16 + updateRadius - 1; + } + + private int getPredefinedBlockDataFullLength() { + return engineMode == EngineMode.HIDE ? 1 : predefinedBlockDataFull.length; + } + + @Override + public BlockState[] getPredefinedBlockData(Level world, ChunkAccess chunk, LevelChunkSection chunkSection, boolean initializeBlocks) { + // Return the block data which should be added to the data palettes so that they can be used for the obfuscation + if (chunkSection.bottomBlockY() >> 4 <= maxChunkSectionIndex) { + if (engineMode == EngineMode.HIDE) { + return switch (world.getWorld().getEnvironment()) { + case NETHER -> predefinedBlockDataNetherrack; + case THE_END -> predefinedBlockDataEndStone; + default -> predefinedBlockDataStone; + }; + } + return predefinedBlockData; + } + + return null; + } + + @Override + public boolean shouldModify(ServerPlayer entityPlayer, LevelChunk chunk) { + return !usePermission || !entityPlayer.getBukkitEntity().hasPermission("paper.antixray.bypass"); + } + + @Override + public ChunkPacketInfoAntiXray getChunkPacketInfo(ClientboundLevelChunkPacket chunkPacket, LevelChunk chunk) { + // Return a new instance to collect data and objects in the right state while creating the chunk packet for thread safe access later + // Note: As of 1.14 this has to be moved later due to the chunk system. + return new ChunkPacketInfoAntiXray(chunkPacket, chunk, this); + } + + @Override + public void modifyBlocks(ClientboundLevelChunkPacket chunkPacket, ChunkPacketInfo chunkPacketInfo) { + if (chunkPacketInfo == null) { + chunkPacket.setReady(true); + return; + } + + if (!Bukkit.isPrimaryThread()) { + // plugins? + MinecraftServer.getServer().scheduleOnMain(() -> { + this.modifyBlocks(chunkPacket, chunkPacketInfo); + }); + return; + } + + LevelChunk chunk = chunkPacketInfo.getChunk(); + int x = chunk.getPos().x; + int z = chunk.getPos().z; + ServerLevel world = chunk.level; + ((ChunkPacketInfoAntiXray) chunkPacketInfo).setNearbyChunks( + (LevelChunk) world.getChunkIfLoadedImmediately(x - 1, z), + (LevelChunk) world.getChunkIfLoadedImmediately(x + 1, z), + (LevelChunk) world.getChunkIfLoadedImmediately(x, z - 1), + (LevelChunk) world.getChunkIfLoadedImmediately(x, z + 1)); + + executor.execute((ChunkPacketInfoAntiXray) chunkPacketInfo); + } + + // Actually these fields should be variables inside the obfuscate method but in sync mode or with SingleThreadExecutor in async mode it's okay (even without ThreadLocal) + // If an ExecutorService with multiple threads is used, ThreadLocal must be used here + private final ThreadLocal predefinedBlockDataBits = ThreadLocal.withInitial(() -> new int[getPredefinedBlockDataFullLength()]); + private static final ThreadLocal solid = ThreadLocal.withInitial(() -> new boolean[Block.BLOCK_STATE_REGISTRY.size()]); + private static final ThreadLocal obfuscate = ThreadLocal.withInitial(() -> new boolean[Block.BLOCK_STATE_REGISTRY.size()]); + // These boolean arrays represent chunk layers, true means don't obfuscate, false means obfuscate + private static final ThreadLocal current = ThreadLocal.withInitial(() -> new boolean[16][16]); + private static final ThreadLocal next = ThreadLocal.withInitial(() -> new boolean[16][16]); + private static final ThreadLocal nextNext = ThreadLocal.withInitial(() -> new boolean[16][16]); + + public void obfuscate(ChunkPacketInfoAntiXray chunkPacketInfoAntiXray) { + int[] predefinedBlockDataBits = this.predefinedBlockDataBits.get(); + boolean[] solid = ChunkPacketBlockControllerAntiXray.solid.get(); + boolean[] obfuscate = ChunkPacketBlockControllerAntiXray.obfuscate.get(); + boolean[][] current = ChunkPacketBlockControllerAntiXray.current.get(); + boolean[][] next = ChunkPacketBlockControllerAntiXray.next.get(); + boolean[][] nextNext = ChunkPacketBlockControllerAntiXray.nextNext.get(); + // dataBitsReader, dataBitsWriter and nearbyChunkSections could also be reused (with ThreadLocal if necessary) but it's not worth it + DataBitsReader dataBitsReader = new DataBitsReader(); + DataBitsWriter dataBitsWriter = new DataBitsWriter(); + LevelChunkSection[] nearbyChunkSections = new LevelChunkSection[4]; + boolean[] solidTemp = null; + boolean[] obfuscateTemp = null; + dataBitsReader.setDataBits(chunkPacketInfoAntiXray.getData()); + dataBitsWriter.setDataBits(chunkPacketInfoAntiXray.getData()); + int numberOfBlocks = predefinedBlockDataBits.length; + // Keep the lambda expressions as simple as possible. They are used very frequently. + IntSupplier random = numberOfBlocks == 1 ? (() -> 0) : new IntSupplier() { + private int state; + + { + while ((state = ThreadLocalRandom.current().nextInt()) == 0); + } + + @Override + public int getAsInt() { + // https://en.wikipedia.org/wiki/Xorshift + state ^= state << 13; + state ^= state >>> 17; + state ^= state << 5; + // https://www.pcg-random.org/posts/bounded-rands.html + return (int) ((Integer.toUnsignedLong(state) * numberOfBlocks) >>> 32); + } + }; + + for (int chunkSectionIndex = 0; chunkSectionIndex <= maxChunkSectionIndex; chunkSectionIndex++) { + if (chunkPacketInfoAntiXray.isWritten(chunkSectionIndex) && chunkPacketInfoAntiXray.getPredefinedObjects(chunkSectionIndex) != null) { + int[] predefinedBlockDataBitsTemp; + + if (chunkPacketInfoAntiXray.getDataPalette(chunkSectionIndex) == LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE) { + predefinedBlockDataBitsTemp = engineMode == EngineMode.HIDE ? chunkPacketInfoAntiXray.getChunk().level.getWorld().getEnvironment() == Environment.NETHER ? predefinedBlockDataBitsNetherrackGlobal : chunkPacketInfoAntiXray.getChunk().level.getWorld().getEnvironment() == Environment.THE_END ? predefinedBlockDataBitsEndStoneGlobal : predefinedBlockDataBitsStoneGlobal : predefinedBlockDataBitsGlobal; + } else { + // If it's this.predefinedBlockData, use this.predefinedBlockDataFull instead + BlockState[] predefinedBlockDataFull = chunkPacketInfoAntiXray.getPredefinedObjects(chunkSectionIndex) == predefinedBlockData ? this.predefinedBlockDataFull : chunkPacketInfoAntiXray.getPredefinedObjects(chunkSectionIndex); + predefinedBlockDataBitsTemp = predefinedBlockDataBits; + + for (int i = 0; i < predefinedBlockDataBitsTemp.length; i++) { + predefinedBlockDataBitsTemp[i] = chunkPacketInfoAntiXray.getDataPalette(chunkSectionIndex).idFor(predefinedBlockDataFull[i]); + } + } + + dataBitsWriter.setIndex(chunkPacketInfoAntiXray.getDataBitsIndex(chunkSectionIndex)); + + // Check if the chunk section below was not obfuscated + if (chunkSectionIndex == 0 || !chunkPacketInfoAntiXray.isWritten(chunkSectionIndex - 1) || chunkPacketInfoAntiXray.getPredefinedObjects(chunkSectionIndex - 1) == null) { + // If so, initialize some stuff + dataBitsReader.setBitsPerObject(chunkPacketInfoAntiXray.getBitsPerObject(chunkSectionIndex)); + dataBitsReader.setIndex(chunkPacketInfoAntiXray.getDataBitsIndex(chunkSectionIndex)); + solidTemp = readDataPalette(chunkPacketInfoAntiXray.getDataPalette(chunkSectionIndex), solid, solidGlobal); + obfuscateTemp = readDataPalette(chunkPacketInfoAntiXray.getDataPalette(chunkSectionIndex), obfuscate, obfuscateGlobal); + // Read the blocks of the upper layer of the chunk section below if it exists + LevelChunkSection belowChunkSection = null; + boolean skipFirstLayer = chunkSectionIndex == 0 || (belowChunkSection = chunkPacketInfoAntiXray.getChunk().getSections()[chunkSectionIndex - 1]) == LevelChunk.EMPTY_SECTION; + + for (int z = 0; z < 16; z++) { + for (int x = 0; x < 16; x++) { + current[z][x] = true; + next[z][x] = skipFirstLayer || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(belowChunkSection.getBlockState(x, 15, z))]; + } + } + + // Abuse the obfuscateLayer method to read the blocks of the first layer of the current chunk section + dataBitsWriter.setBitsPerObject(0); + obfuscateLayer(-1, dataBitsReader, dataBitsWriter, solidTemp, obfuscateTemp, predefinedBlockDataBitsTemp, current, next, nextNext, emptyNearbyChunkSections, random); + } + + dataBitsWriter.setBitsPerObject(chunkPacketInfoAntiXray.getBitsPerObject(chunkSectionIndex)); + nearbyChunkSections[0] = chunkPacketInfoAntiXray.getNearbyChunks()[0] == null ? LevelChunk.EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[0].getSections()[chunkSectionIndex]; + nearbyChunkSections[1] = chunkPacketInfoAntiXray.getNearbyChunks()[1] == null ? LevelChunk.EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[1].getSections()[chunkSectionIndex]; + nearbyChunkSections[2] = chunkPacketInfoAntiXray.getNearbyChunks()[2] == null ? LevelChunk.EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[2].getSections()[chunkSectionIndex]; + nearbyChunkSections[3] = chunkPacketInfoAntiXray.getNearbyChunks()[3] == null ? LevelChunk.EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[3].getSections()[chunkSectionIndex]; + + // Obfuscate all layers of the current chunk section except the upper one + for (int y = 0; y < 15; y++) { + boolean[][] temp = current; + current = next; + next = nextNext; + nextNext = temp; + obfuscateLayer(y, dataBitsReader, dataBitsWriter, solidTemp, obfuscateTemp, predefinedBlockDataBitsTemp, current, next, nextNext, nearbyChunkSections, random); + } + + // Check if the chunk section above doesn't need obfuscation + if (chunkSectionIndex == maxChunkSectionIndex || !chunkPacketInfoAntiXray.isWritten(chunkSectionIndex + 1) || chunkPacketInfoAntiXray.getPredefinedObjects(chunkSectionIndex + 1) == null) { + // If so, obfuscate the upper layer of the current chunk section by reading blocks of the first layer from the chunk section above if it exists + LevelChunkSection aboveChunkSection; + + if (chunkSectionIndex != worldSectionHeight && (aboveChunkSection = chunkPacketInfoAntiXray.getChunk().getSections()[chunkSectionIndex + 1]) != LevelChunk.EMPTY_SECTION) { + boolean[][] temp = current; + current = next; + next = nextNext; + nextNext = temp; + + for (int z = 0; z < 16; z++) { + for (int x = 0; x < 16; x++) { + if (!solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(aboveChunkSection.getBlockState(x, 0, z))]) { + current[z][x] = true; + } + } + } + + // There is nothing to read anymore + dataBitsReader.setBitsPerObject(0); + solid[0] = true; + obfuscateLayer(15, dataBitsReader, dataBitsWriter, solid, obfuscateTemp, predefinedBlockDataBitsTemp, current, next, nextNext, nearbyChunkSections, random); + } + } else { + // If not, initialize the reader and other stuff for the chunk section above to obfuscate the upper layer of the current chunk section + dataBitsReader.setBitsPerObject(chunkPacketInfoAntiXray.getBitsPerObject(chunkSectionIndex + 1)); + dataBitsReader.setIndex(chunkPacketInfoAntiXray.getDataBitsIndex(chunkSectionIndex + 1)); + solidTemp = readDataPalette(chunkPacketInfoAntiXray.getDataPalette(chunkSectionIndex + 1), solid, solidGlobal); + obfuscateTemp = readDataPalette(chunkPacketInfoAntiXray.getDataPalette(chunkSectionIndex + 1), obfuscate, obfuscateGlobal); + boolean[][] temp = current; + current = next; + next = nextNext; + nextNext = temp; + obfuscateLayer(15, dataBitsReader, dataBitsWriter, solidTemp, obfuscateTemp, predefinedBlockDataBitsTemp, current, next, nextNext, nearbyChunkSections, random); + } + + dataBitsWriter.finish(); + } + } + + chunkPacketInfoAntiXray.getChunkPacket().setReady(true); + } + + private void obfuscateLayer(int y, DataBitsReader dataBitsReader, DataBitsWriter dataBitsWriter, boolean[] solid, boolean[] obfuscate, int[] predefinedBlockDataBits, boolean[][] current, boolean[][] next, boolean[][] nextNext, LevelChunkSection[] nearbyChunkSections, IntSupplier random) { + // First block of first line + int dataBits = dataBitsReader.read(); + + if (nextNext[0][0] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[0][1] = true; + next[1][0] = true; + } else { + if (nearbyChunkSections[2] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[2].getBlockState(0, y, 15))] || nearbyChunkSections[0] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[0].getBlockState(15, y, 0))] || current[0][0]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[0][0] = true; + } + + // First line + for (int x = 1; x < 15; x++) { + dataBits = dataBitsReader.read(); + + if (nextNext[0][x] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[0][x - 1] = true; + next[0][x + 1] = true; + next[1][x] = true; + } else { + if (nearbyChunkSections[2] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[2].getBlockState(x, y, 15))] || current[0][x]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[0][x] = true; + } + } + + // Last block of first line + dataBits = dataBitsReader.read(); + + if (nextNext[0][15] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[0][14] = true; + next[1][15] = true; + } else { + if (nearbyChunkSections[2] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[2].getBlockState(15, y, 15))] || nearbyChunkSections[1] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[1].getBlockState(0, y, 0))] || current[0][15]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[0][15] = true; + } + + // All inner lines + for (int z = 1; z < 15; z++) { + // First block + dataBits = dataBitsReader.read(); + + if (nextNext[z][0] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[z][1] = true; + next[z - 1][0] = true; + next[z + 1][0] = true; + } else { + if (nearbyChunkSections[0] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[0].getBlockState(15, y, z))] || current[z][0]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[z][0] = true; + } + + // All inner blocks + for (int x = 1; x < 15; x++) { + dataBits = dataBitsReader.read(); + + if (nextNext[z][x] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[z][x - 1] = true; + next[z][x + 1] = true; + next[z - 1][x] = true; + next[z + 1][x] = true; + } else { + if (current[z][x]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[z][x] = true; + } + } + + // Last block + dataBits = dataBitsReader.read(); + + if (nextNext[z][15] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[z][14] = true; + next[z - 1][15] = true; + next[z + 1][15] = true; + } else { + if (nearbyChunkSections[1] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[1].getBlockState(0, y, z))] || current[z][15]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[z][15] = true; + } + } + + // First block of last line + dataBits = dataBitsReader.read(); + + if (nextNext[15][0] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[15][1] = true; + next[14][0] = true; + } else { + if (nearbyChunkSections[3] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[3].getBlockState(0, y, 0))] || nearbyChunkSections[0] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[0].getBlockState(15, y, 15))] || current[15][0]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[15][0] = true; + } + + // Last line + for (int x = 1; x < 15; x++) { + dataBits = dataBitsReader.read(); + + if (nextNext[15][x] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[15][x - 1] = true; + next[15][x + 1] = true; + next[14][x] = true; + } else { + if (nearbyChunkSections[3] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[3].getBlockState(x, y, 0))] || current[15][x]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[15][x] = true; + } + } + + // Last block of last line + dataBits = dataBitsReader.read(); + + if (nextNext[15][15] = !solid[dataBits]) { + dataBitsWriter.skip(); + next[15][14] = true; + next[14][15] = true; + } else { + if (nearbyChunkSections[3] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[3].getBlockState(15, y, 0))] || nearbyChunkSections[1] == LevelChunk.EMPTY_SECTION || !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(nearbyChunkSections[1].getBlockState(0, y, 15))] || current[15][15]) { + dataBitsWriter.skip(); + } else { + dataBitsWriter.write(predefinedBlockDataBits[random.getAsInt()]); + } + } + + if (!obfuscate[dataBits]) { + next[15][15] = true; + } + } + + private boolean[] readDataPalette(Palette dataPalette, boolean[] temp, boolean[] global) { + if (dataPalette == LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE) { + return global; + } + + BlockState blockData; + + for (int i = 0; (blockData = dataPalette.valueFor(i)) != null; i++) { + temp[i] = global[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(blockData)]; + } + + return temp; + } + + @Override + public void onBlockChange(Level world, BlockPos blockPosition, BlockState newBlockData, BlockState oldBlockData, int flag) { + if (oldBlockData != null && solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(oldBlockData)] && !solidGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(newBlockData)] && blockPosition.getY() <= maxBlockYUpdatePosition) { + updateNearbyBlocks(world, blockPosition); + } + } + + @Override + public void onPlayerLeftClickBlock(ServerPlayerGameMode playerInteractManager, BlockPos blockPosition, Direction enumDirection) { + if (blockPosition.getY() <= maxBlockYUpdatePosition) { + updateNearbyBlocks(playerInteractManager.level, blockPosition); + } + } + + private void updateNearbyBlocks(Level world, BlockPos blockPosition) { + if (updateRadius >= 2) { + BlockPos temp = blockPosition.west(); + updateBlock(world, temp); + updateBlock(world, temp.west()); + updateBlock(world, temp.below()); + updateBlock(world, temp.above()); + updateBlock(world, temp.north()); + updateBlock(world, temp.south()); + updateBlock(world, temp = blockPosition.east()); + updateBlock(world, temp.east()); + updateBlock(world, temp.below()); + updateBlock(world, temp.above()); + updateBlock(world, temp.north()); + updateBlock(world, temp.south()); + updateBlock(world, temp = blockPosition.below()); + updateBlock(world, temp.below()); + updateBlock(world, temp.north()); + updateBlock(world, temp.south()); + updateBlock(world, temp = blockPosition.above()); + updateBlock(world, temp.above()); + updateBlock(world, temp.north()); + updateBlock(world, temp.south()); + updateBlock(world, temp = blockPosition.north()); + updateBlock(world, temp.north()); + updateBlock(world, temp = blockPosition.south()); + updateBlock(world, temp.south()); + } else if (updateRadius == 1) { + updateBlock(world, blockPosition.west()); + updateBlock(world, blockPosition.east()); + updateBlock(world, blockPosition.below()); + updateBlock(world, blockPosition.above()); + updateBlock(world, blockPosition.north()); + updateBlock(world, blockPosition.south()); + } else { + // Do nothing if updateRadius <= 0 (test mode) + } + } + + private void updateBlock(Level world, BlockPos blockPosition) { + BlockState blockData = world.getTypeIfLoaded(blockPosition); + + if (blockData != null && obfuscateGlobal[LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE.idFor(blockData)]) { + // world.notify(blockPosition, blockData, blockData, 3); + ((ServerLevel)world).getChunkSource().blockChanged(blockPosition); // We only need to re-send to client + } + } + + public enum EngineMode { + + HIDE(1, "hide ores"), + OBFUSCATE(2, "obfuscate"); + + private final int id; + private final String description; + + EngineMode(int id, String description) { + this.id = id; + this.description = description; + } + + public static EngineMode getById(int id) { + for (EngineMode engineMode : values()) { + if (engineMode.id == id) { + return engineMode; + } + } + + return null; + } + + public int getId() { + return id; + } + + public String getDescription() { + return description; + } + } +} diff --git a/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfo.java b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfo.java new file mode 100644 index 0000000000000000000000000000000000000000..7c3a85d65754c820e71a1db68f0c5a76c7327d9d --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfo.java @@ -0,0 +1,81 @@ +package com.destroystokyo.paper.antixray; + +import net.minecraft.network.protocol.game.ClientboundLevelChunkPacket; +import net.minecraft.world.level.chunk.LevelChunk; +import net.minecraft.world.level.chunk.Palette; + +public class ChunkPacketInfo { + + private final ClientboundLevelChunkPacket chunkPacket; + private final LevelChunk chunk; + private byte[] data; + private final int[] bitsPerObject; + private final Object[] dataPalettes; + private final int[] dataBitsIndexes; + private final Object[][] predefinedObjects; + + public ChunkPacketInfo(ClientboundLevelChunkPacket chunkPacket, LevelChunk chunk) { + this.chunkPacket = chunkPacket; + this.chunk = chunk; + + int sections = chunk.getSectionsCount(); + this.bitsPerObject = new int[sections]; + this.dataPalettes = new Object[sections]; + this.dataBitsIndexes = new int[sections]; + this.predefinedObjects = new Object[sections][]; + } + + public ClientboundLevelChunkPacket getChunkPacket() { + return chunkPacket; + } + + public LevelChunk getChunk() { + return chunk; + } + + public byte[] getData() { + return data; + } + + public void setData(byte[] data) { + this.data = data; + } + + public int getBitsPerObject(int chunkSectionIndex) { + return bitsPerObject[chunkSectionIndex]; + } + + public void setBitsPerObject(int chunkSectionIndex, int bitsPerObject) { + this.bitsPerObject[chunkSectionIndex] = bitsPerObject; + } + + @SuppressWarnings("unchecked") + public Palette getDataPalette(int chunkSectionIndex) { + return (Palette) dataPalettes[chunkSectionIndex]; + } + + public void setDataPalette(int chunkSectionIndex, Palette dataPalette) { + dataPalettes[chunkSectionIndex] = dataPalette; + } + + public int getDataBitsIndex(int chunkSectionIndex) { + return dataBitsIndexes[chunkSectionIndex]; + } + + public void setDataBitsIndex(int chunkSectionIndex, int dataBitsIndex) { + dataBitsIndexes[chunkSectionIndex] = dataBitsIndex; + } + + @SuppressWarnings("unchecked") + public T[] getPredefinedObjects(int chunkSectionIndex) { + return (T[]) predefinedObjects[chunkSectionIndex]; + } + + public void setPredefinedObjects(int chunkSectionIndex, T[] predefinedObjects) { + this.predefinedObjects[chunkSectionIndex] = predefinedObjects; + } + + public boolean isWritten(int chunkSectionIndex) { + return bitsPerObject[chunkSectionIndex] != 0; + } +} diff --git a/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfoAntiXray.java b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfoAntiXray.java new file mode 100644 index 0000000000000000000000000000000000000000..2339aa92ecaf3af9c7481ec6c21981c39319c76f --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfoAntiXray.java @@ -0,0 +1,30 @@ +package com.destroystokyo.paper.antixray; + +import net.minecraft.network.protocol.game.ClientboundLevelChunkPacket; +import net.minecraft.world.level.block.state.BlockState; +import net.minecraft.world.level.chunk.LevelChunk; + +public final class ChunkPacketInfoAntiXray extends ChunkPacketInfo implements Runnable { + + private LevelChunk[] nearbyChunks; + private final ChunkPacketBlockControllerAntiXray chunkPacketBlockControllerAntiXray; + + public ChunkPacketInfoAntiXray(ClientboundLevelChunkPacket packetPlayOutMapChunk, LevelChunk chunk, + ChunkPacketBlockControllerAntiXray chunkPacketBlockControllerAntiXray) { + super(packetPlayOutMapChunk, chunk); + this.chunkPacketBlockControllerAntiXray = chunkPacketBlockControllerAntiXray; + } + + public LevelChunk[] getNearbyChunks() { + return nearbyChunks; + } + + public void setNearbyChunks(LevelChunk... nearbyChunks) { + this.nearbyChunks = nearbyChunks; + } + + @Override + public void run() { + chunkPacketBlockControllerAntiXray.obfuscate(this); + } +} diff --git a/src/main/java/com/destroystokyo/paper/antixray/DataBitsReader.java b/src/main/java/com/destroystokyo/paper/antixray/DataBitsReader.java new file mode 100644 index 0000000000000000000000000000000000000000..298ea423084dbcc1b61f991bcd82b8ae51bf0977 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/antixray/DataBitsReader.java @@ -0,0 +1,51 @@ +package com.destroystokyo.paper.antixray; + +public final class DataBitsReader { + + private byte[] dataBits; + private int bitsPerObject; + private int mask; + private int longInDataBitsIndex; + private int bitInLongIndex; + private long current; + + public void setDataBits(byte[] dataBits) { + this.dataBits = dataBits; + } + + public void setBitsPerObject(int bitsPerObject) { + this.bitsPerObject = bitsPerObject; + mask = (1 << bitsPerObject) - 1; + } + + public void setIndex(int index) { + this.longInDataBitsIndex = index; + bitInLongIndex = 0; + init(); + } + + private void init() { + if (dataBits.length > longInDataBitsIndex + 7) { + current = ((((long) dataBits[longInDataBitsIndex]) << 56) + | (((long) dataBits[longInDataBitsIndex + 1] & 0xff) << 48) + | (((long) dataBits[longInDataBitsIndex + 2] & 0xff) << 40) + | (((long) dataBits[longInDataBitsIndex + 3] & 0xff) << 32) + | (((long) dataBits[longInDataBitsIndex + 4] & 0xff) << 24) + | (((long) dataBits[longInDataBitsIndex + 5] & 0xff) << 16) + | (((long) dataBits[longInDataBitsIndex + 6] & 0xff) << 8) + | (((long) dataBits[longInDataBitsIndex + 7] & 0xff))); + } + } + + public int read() { + if (bitInLongIndex + bitsPerObject > 64) { + bitInLongIndex = 0; + longInDataBitsIndex += 8; + init(); + } + + int value = (int) (current >>> bitInLongIndex) & mask; + bitInLongIndex += bitsPerObject; + return value; + } +} diff --git a/src/main/java/com/destroystokyo/paper/antixray/DataBitsWriter.java b/src/main/java/com/destroystokyo/paper/antixray/DataBitsWriter.java new file mode 100644 index 0000000000000000000000000000000000000000..333763936897befda5bb6c077944d2667f922799 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/antixray/DataBitsWriter.java @@ -0,0 +1,79 @@ +package com.destroystokyo.paper.antixray; + +public final class DataBitsWriter { + + private byte[] dataBits; + private int bitsPerObject; + private long mask; + private int longInDataBitsIndex; + private int bitInLongIndex; + private long current; + private boolean dirty; + + public void setDataBits(byte[] dataBits) { + this.dataBits = dataBits; + } + + public void setBitsPerObject(int bitsPerObject) { + this.bitsPerObject = bitsPerObject; + mask = (1 << bitsPerObject) - 1; + } + + public void setIndex(int index) { + this.longInDataBitsIndex = index; + bitInLongIndex = 0; + init(); + } + + private void init() { + if (dataBits.length > longInDataBitsIndex + 7) { + current = ((((long) dataBits[longInDataBitsIndex]) << 56) + | (((long) dataBits[longInDataBitsIndex + 1] & 0xff) << 48) + | (((long) dataBits[longInDataBitsIndex + 2] & 0xff) << 40) + | (((long) dataBits[longInDataBitsIndex + 3] & 0xff) << 32) + | (((long) dataBits[longInDataBitsIndex + 4] & 0xff) << 24) + | (((long) dataBits[longInDataBitsIndex + 5] & 0xff) << 16) + | (((long) dataBits[longInDataBitsIndex + 6] & 0xff) << 8) + | (((long) dataBits[longInDataBitsIndex + 7] & 0xff))); + } + + dirty = false; + } + + public void finish() { + if (dirty && dataBits.length > longInDataBitsIndex + 7) { + dataBits[longInDataBitsIndex] = (byte) (current >> 56 & 0xff); + dataBits[longInDataBitsIndex + 1] = (byte) (current >> 48 & 0xff); + dataBits[longInDataBitsIndex + 2] = (byte) (current >> 40 & 0xff); + dataBits[longInDataBitsIndex + 3] = (byte) (current >> 32 & 0xff); + dataBits[longInDataBitsIndex + 4] = (byte) (current >> 24 & 0xff); + dataBits[longInDataBitsIndex + 5] = (byte) (current >> 16 & 0xff); + dataBits[longInDataBitsIndex + 6] = (byte) (current >> 8 & 0xff); + dataBits[longInDataBitsIndex + 7] = (byte) (current & 0xff); + } + } + + public void write(int value) { + if (bitInLongIndex + bitsPerObject > 64) { + finish(); + bitInLongIndex = 0; + longInDataBitsIndex += 8; + init(); + } + + current = current & ~(mask << bitInLongIndex) | (value & mask) << bitInLongIndex; + dirty = true; + bitInLongIndex += bitsPerObject; + } + + public void skip() { + bitInLongIndex += bitsPerObject; + + if (bitInLongIndex > 64) { + finish(); + bitInLongIndex = bitsPerObject; + longInDataBitsIndex += 8; + init(); + } + } +} diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java index c28879f32b004f36ff746ea2274f91ddd9501e71..7762d8ff94f856d613a6f50311006b698f2aa2b0 100644 --- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java +++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java @@ -37,7 +37,13 @@ public class ClientboundLevelChunkPacket implements Packet chunkPacketInfo = modifyBlocks ? chunk.level.chunkPacketBlockController.getChunkPacketInfo(this, chunk) : null; + // Paper end ChunkPos chunkPos = chunk.getPos(); this.x = chunkPos.x; this.z = chunkPos.z; @@ -51,7 +57,12 @@ public class ClientboundLevelChunkPacket implements Packet chunkPacketInfo) { + // Paper end BitSet bitSet = new BitSet(); LevelChunkSection[] levelChunkSections = chunk.getSections(); int i = 0; @@ -129,7 +143,7 @@ public class ClientboundLevelChunkPacket implements Packet[] packets, LevelChunk chunk) { if (packets[0] == null) { - packets[0] = new ClientboundLevelChunkPacket(chunk); + packets[0] = new ClientboundLevelChunkPacket(chunk, chunk.level.chunkPacketBlockController.shouldModify(player, chunk)); // Paper - Ani-Xray - Bypass packets[1] = new ClientboundLightUpdatePacket(chunk.getPos(), this.lightEngine, (BitSet) null, (BitSet) null, true); } diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java index 22db34272c6635438d11f525fb4f08e2aa631f55..fcf5c7b28e927db977ad5b851edaf68e59de8d5b 100644 --- a/src/main/java/net/minecraft/server/level/ServerLevel.java +++ b/src/main/java/net/minecraft/server/level/ServerLevel.java @@ -292,7 +292,7 @@ public class ServerLevel extends net.minecraft.world.level.Level implements Worl // Add env and gen to constructor, WorldData -> WorldDataServer public ServerLevel(MinecraftServer minecraftserver, Executor executor, LevelStorageSource.LevelStorageAccess convertable_conversionsession, ServerLevelData iworlddataserver, ResourceKey resourcekey, DimensionType dimensionmanager, ChunkProgressListener worldloadlistener, ChunkGenerator chunkgenerator, boolean flag, long i, List list, boolean flag1, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen) { // Objects.requireNonNull(minecraftserver); // CraftBukkit - decompile error - super(iworlddataserver, resourcekey, dimensionmanager, minecraftserver::getProfiler, false, flag, i, gen, env); + super(iworlddataserver, resourcekey, dimensionmanager, minecraftserver::getProfiler, false, flag, i, gen, env, executor); // Paper - pass executor this.pvpMode = minecraftserver.isPvpAllowed(); this.convertable = convertable_conversionsession; this.uuid = WorldUUID.getUUID(convertable_conversionsession.levelPath.toFile()); diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java index f4a056185990181e486f452960159a5287947382..a695e5a0c2e8846333ccb9aea499b5656af35163 100644 --- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java +++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java @@ -49,7 +49,7 @@ import org.bukkit.event.player.PlayerInteractEvent; public class ServerPlayerGameMode { private static final Logger LOGGER = LogManager.getLogger(); - protected ServerLevel level; + public ServerLevel level; // Paper - protected->public protected final ServerPlayer player; private GameType gameModeForPlayer; @Nullable @@ -314,6 +314,8 @@ public class ServerPlayerGameMode { } } + + this.level.chunkPacketBlockController.onPlayerLeftClickBlock(this, pos, direction); // Paper - Anti-Xray } public void destroyAndAck(BlockPos pos, ServerboundPlayerActionPacket.Action action, String reason) { diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java index 580b3d7d993751e7c04e6b7d5d4d8fa9d150d383..83673e66aab4988e912d78fb8d1a45f807e38bd9 100644 --- a/src/main/java/net/minecraft/world/level/Level.java +++ b/src/main/java/net/minecraft/world/level/Level.java @@ -164,6 +164,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable { public final org.spigotmc.SpigotWorldConfig spigotConfig; // Spigot public final com.destroystokyo.paper.PaperWorldConfig paperConfig; // Paper + public final com.destroystokyo.paper.antixray.ChunkPacketBlockController chunkPacketBlockController; // Paper - Anti-Xray public final co.aikar.timings.WorldTimingsHandler timings; // Paper public static BlockPos lastPhysicsProblem; // Spigot @@ -185,7 +186,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable { return this.typeKey; } - protected Level(WritableLevelData worlddatamutable, ResourceKey resourcekey, final DimensionType dimensionmanager, Supplier supplier, boolean flag, boolean flag1, long i, org.bukkit.generator.ChunkGenerator gen, org.bukkit.World.Environment env) { + protected Level(WritableLevelData worlddatamutable, ResourceKey resourcekey, final DimensionType dimensionmanager, Supplier supplier, boolean flag, boolean flag1, long i, org.bukkit.generator.ChunkGenerator gen, org.bukkit.World.Environment env, java.util.concurrent.Executor executor) { // Paper this.spigotConfig = new org.spigotmc.SpigotWorldConfig(((net.minecraft.world.level.storage.PrimaryLevelData) worlddatamutable).getLevelName()); // Spigot this.paperConfig = new com.destroystokyo.paper.PaperWorldConfig(((net.minecraft.world.level.storage.PrimaryLevelData) worlddatamutable).getLevelName(), this.spigotConfig); // Paper this.generator = gen; @@ -258,6 +259,9 @@ public abstract class Level implements LevelAccessor, AutoCloseable { this.keepSpawnInMemory = this.paperConfig.keepSpawnInMemory; // Paper this.entityLimiter = new org.spigotmc.TickLimiter(spigotConfig.entityMaxTickTime); this.tileLimiter = new org.spigotmc.TickLimiter(spigotConfig.tileMaxTickTime); + this.chunkPacketBlockController = this.paperConfig.antiXray ? + new com.destroystokyo.paper.antixray.ChunkPacketBlockControllerAntiXray(this, executor) + : com.destroystokyo.paper.antixray.ChunkPacketBlockController.NO_OPERATION_INSTANCE; // Paper - Anti-Xray } // Paper start @@ -448,6 +452,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable { // CraftBukkit end BlockState iblockdata1 = chunk.setType(pos, state, (flags & 64) != 0, (flags & 1024) == 0); // CraftBukkit custom NO_PLACE flag + this.chunkPacketBlockController.onBlockChange(this, pos, state, iblockdata1, flags); // Paper - Anti-Xray if (iblockdata1 == null) { // CraftBukkit start - remove blockstate if failed (or the same) diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java index c0075d226331f32e470dae5bf1ce8d79e8b263dc..a857953f3488e79fd601ac63881bc4d87708afa7 100644 --- a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java +++ b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java @@ -75,12 +75,18 @@ public interface ChunkAccess extends BlockGetter, FeatureAccess { default LevelChunkSection getOrCreateSection(int yIndex) { LevelChunkSection[] levelChunkSections = this.getSections(); if (levelChunkSections[yIndex] == LevelChunk.EMPTY_SECTION) { - levelChunkSections[yIndex] = new LevelChunkSection(this.getSectionYFromSectionIndex(yIndex)); + levelChunkSections[yIndex] = new LevelChunkSection(this.getSectionYFromSectionIndex(yIndex), this, getServerLevel(), true); } return levelChunkSections[yIndex]; } + // Paper start + default net.minecraft.server.level.ServerLevel getServerLevel() { + return null; + } + // Paper end + Collection> getHeightmaps(); default void setHeightmap(Heightmap.Types type, long[] heightmap) { diff --git a/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java index 69c2454533e6f21c70792b555ec02c6bc6d169b3..2607c7ba5cf1aca5f3e5c22be2e4e8b3007427d4 100644 --- a/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java +++ b/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java @@ -86,7 +86,7 @@ public class EmptyLevelChunk extends LevelChunk { private static final Biome[] EMPTY_BIOMES = new Biome[0]; public EmptyChunkBiomeContainer(Level world) { - super(world.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), world, EMPTY_BIOMES); + super(net.minecraft.server.MinecraftServer.getServer().registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), world, EMPTY_BIOMES); // Paper - world isnt ready yet for anti xray use here, use server singleton for registry } @Override diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java index 8cc0f2a74191357ab52f30439a515709f8ab80d1..fbb82d344f654b90809582916442c520f344aa39 100644 --- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java +++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java @@ -456,7 +456,7 @@ public class LevelChunk implements ChunkAccess { return null; } - chunksection = new LevelChunkSection(SectionPos.blockToSectionCoord(i)); + chunksection = new LevelChunkSection(SectionPos.blockToSectionCoord(i), this, this.level, true); // Paper - Anti-Xray - Add parameters this.sections[j] = chunksection; } @@ -1307,4 +1307,11 @@ public class LevelChunk implements ChunkAccess { return "Level ticker for " + s + "@" + this.getPos(); } } + + // Paper start + @Override + public net.minecraft.server.level.ServerLevel getServerLevel() { + return level; + } + // Paper end } diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java index 5fd66020a937b641e2a060cf38df731a43f3bf55..ec8b67c1b024df38d5e1ad81acff33537ae25626 100644 --- a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java +++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java @@ -20,16 +20,25 @@ public class LevelChunkSection { private short tickingFluidCount; final PalettedContainer states; // Paper - package-private - public LevelChunkSection(int yOffset) { - this(yOffset, (short)0, (short)0, (short)0); + // Paper start - Anti-Xray - Add parameters + @Deprecated public LevelChunkSection(int yOffset) { this(yOffset, null, null, true); } // Notice for updates: Please make sure this constructor isn't used anywhere + public LevelChunkSection(int yOffset, ChunkAccess chunk, net.minecraft.server.level.ServerLevel world, boolean initializeBlocks) { + // Paper end + this(yOffset, (short) 0, (short) 0, (short) 0, chunk, world, initializeBlocks); } - public LevelChunkSection(int yOffset, short nonEmptyBlockCount, short randomTickableBlockCount, short nonEmptyFluidCount) { + // Paper start - Anti-Xray - Add parameters + @Deprecated public LevelChunkSection(int yOffset, short nonEmptyBlockCount, short randomTickableBlockCount, short nonEmptyFluidCount) { // Notice for updates: Please make sure this constructor isn't used anywhere + this(yOffset, nonEmptyBlockCount, randomTickableBlockCount, nonEmptyFluidCount, null, null, true); + } + public LevelChunkSection(int yOffset, short nonEmptyBlockCount, short randomTickableBlockCount, short nonEmptyFluidCount, ChunkAccess chunk, net.minecraft.server.level.ServerLevel world, boolean initializeBlocks) { + // Paper end this.bottomBlockY = getBottomBlockY(yOffset); this.nonEmptyBlockCount = nonEmptyBlockCount; this.tickingBlockCount = randomTickableBlockCount; this.tickingFluidCount = nonEmptyFluidCount; - this.states = new PalettedContainer<>(GLOBAL_BLOCKSTATE_PALETTE, Block.BLOCK_STATE_REGISTRY, NbtUtils::readBlockState, NbtUtils::writeBlockState, Blocks.AIR.defaultBlockState()); + this.states = new PalettedContainer<>(GLOBAL_BLOCKSTATE_PALETTE, Block.BLOCK_STATE_REGISTRY, NbtUtils::readBlockState, NbtUtils::writeBlockState, Blocks.AIR.defaultBlockState(), + world == null ? null : world.chunkPacketBlockController.getPredefinedBlockData(world, chunk, this, initializeBlocks), initializeBlocks); // Paper - Anti-Xray - Add predefined block data } public static int getBottomBlockY(int chunkPos) { @@ -147,9 +156,12 @@ public class LevelChunkSection { this.states.read(buf); } - public void write(FriendlyByteBuf buf) { + // Paper start + @Deprecated public void write(FriendlyByteBuf buf) { write(buf, null); } // Notice for updates: Please make sure this method isn't used anywhere + public void write(FriendlyByteBuf buf, com.destroystokyo.paper.antixray.ChunkPacketInfo chunkPacketInfo) { + // Paper end buf.writeShort(this.nonEmptyBlockCount); - this.states.write(buf); + this.states.write(buf, chunkPacketInfo, this.bottomBlockY); // Paper - Anti-Xray - Add chunk packet info } public int getSerializedSize() { diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java index bb8fd88aebb550edec8c679622a02a595cbc6694..4a6981f8bacdeca1069e1ddfe44ac9c4217ce624 100644 --- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java +++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java @@ -28,6 +28,7 @@ public class PalettedContainer implements PaletteResize { private final Function reader; private final Function writer; private final T defaultValue; + private final T[] predefinedObjects; // Paper - Anti-Xray - Add predefined objects protected BitStorage storage; private Palette palette; private int bits; @@ -48,15 +49,51 @@ public class PalettedContainer implements PaletteResize { this.lock.release(); } - public PalettedContainer(Palette fallbackPalette, IdMapper idList, Function elementDeserializer, Function elementSerializer, T defaultElement) { + // Paper start - Anti-Xray - Add predefined objects + @Deprecated public PalettedContainer(Palette fallbackPalette, IdMapper idList, Function elementDeserializer, Function elementSerializer, T defaultElement) { // Notice for updates: Please make sure this constructor isn't used anywhere + this(fallbackPalette, idList, elementDeserializer, elementSerializer, defaultElement, null, true); + } + public PalettedContainer(Palette fallbackPalette, IdMapper idList, Function elementDeserializer, Function elementSerializer, T defaultElement, T[] predefinedObjects, boolean initialize) { + // Paper end this.globalPalette = fallbackPalette; this.registry = idList; this.reader = elementDeserializer; this.writer = elementSerializer; this.defaultValue = defaultElement; this.setBits(4); + // Paper start - Anti-Xray - Add predefined objects + this.predefinedObjects = predefinedObjects; + + if (initialize) { + if (predefinedObjects == null) { + // Default + this.setBits(4); + } else { + // MathHelper.d() is trailingBits(roundCeilPow2(n)), alternatively; (int)ceil(log2(n)); however it's trash, use numberOfLeadingZeros instead + // Count the bits of the maximum array index to initialize a data palette with enough space from the beginning + // The length of the array is used because air is also added to the data palette from the beginning + // Start with at least 4 + int maxIndex = predefinedObjects.length >> 4; + int bitCount = (32 - Integer.numberOfLeadingZeros(Math.max(16, maxIndex) - 1)); + + // Initialize with at least 15 free indixes + this.setBits((1 << bitCount) - predefinedObjects.length < 16 ? bitCount + 1 : bitCount); + this.addPredefinedObjects(); + } + } + // Paper end } + // Paper start - Anti-Xray - Add predefined objects + private void addPredefinedObjects() { + if (this.predefinedObjects != null && this.palette != this.globalPalette) { + for (T predefinedObject : this.predefinedObjects) { + this.palette.idFor(predefinedObject); + } + } + } + // Paper end + private static int getIndex(int x, int y, int z) { return y << 8 | z << 4 | x; } @@ -85,6 +122,7 @@ public class PalettedContainer implements PaletteResize { Palette palette = this.palette; this.setBits(newSize); + this.addPredefinedObjects(); // Paper - Anti-Xray - Add predefined objects for(int i = 0; i < bitStorage.getSize(); ++i) { T object = palette.valueFor(bitStorage.get(i)); if (object != null) { @@ -159,11 +197,26 @@ public class PalettedContainer implements PaletteResize { } - public void write(FriendlyByteBuf buf) { + // Paper start - Anti-Xray - Add chunk packet info + @Deprecated public void write(FriendlyByteBuf buf) { + write(buf, null, 0); + } + public void write(FriendlyByteBuf buf, com.destroystokyo.paper.antixray.ChunkPacketInfo chunkPacketInfo, int bottomBlockY) { + // Paper end try { this.acquire(); buf.writeByte(this.bits); this.palette.write(buf); + // Paper start - Anti-Xray - Add chunk packet info + if (chunkPacketInfo != null) { + // Bottom block to 0 based chunk section index + int section = (bottomBlockY >> 4) - chunkPacketInfo.getChunk().getMinSection(); + chunkPacketInfo.setBitsPerObject(section, this.bits); + chunkPacketInfo.setDataPalette(section, this.palette); + chunkPacketInfo.setDataBitsIndex(section, buf.writerIndex() + FriendlyByteBuf.getVarIntSize(this.storage.getRaw().length)); + chunkPacketInfo.setPredefinedObjects(section, this.predefinedObjects); + } + // Paper end buf.writeLongArray(this.storage.getRaw()); } finally { this.release(); @@ -174,12 +227,14 @@ public class PalettedContainer implements PaletteResize { public void read(ListTag paletteNbt, long[] data) { try { this.acquire(); - int i = Math.max(4, Mth.ceillog2(paletteNbt.size())); - if (i != this.bits) { + // Paper - Anti-Xray - TODO: Should this.predefinedObjects.length just be added here (faster) or should the contents be compared to calculate the size (less RAM)? + int i = Math.max(4, Mth.ceillog2(paletteNbt.size() + (this.predefinedObjects == null ? 0 : this.predefinedObjects.length))); // Paper - Anti-Xray - Calculate the size with predefined objects + if (true || i != this.bits) { // Paper - Anti-Xray - Not initialized yet this.setBits(i); } this.palette.read(paletteNbt); + this.addPredefinedObjects(); // Paper - Anti-Xray - Add predefined objects int j = data.length * 64 / 4096; if (this.palette == this.globalPalette) { Palette palette = new HashMapPalette<>(this.registry, i, this.dummyPaletteResize, this.reader, this.writer); diff --git a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java index 64cb0658021866c3875d145cc4266896e57c081e..f0c537e1d6b32ecde52b3d456f0f3889ff554824 100644 --- a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java +++ b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java @@ -63,7 +63,7 @@ public class ProtoChunk implements ChunkAccess { private long inhabitedTime; private final Map carvingMasks = new Object2ObjectArrayMap<>(); private volatile boolean isLightCorrect; - final net.minecraft.world.level.Level level; // Paper - Add level + final net.minecraft.server.level.ServerLevel level; // Paper - Add level // Paper start - add level @Deprecated public ProtoChunk(ChunkPos pos, UpgradeData upgradeData, LevelHeightAccessor world) { this(pos, upgradeData, world, null); } @@ -98,6 +98,13 @@ public class ProtoChunk implements ChunkAccess { this.postProcessing = new ShortList[world.getSectionsCount()]; } + // Paper start + @Override + public net.minecraft.server.level.ServerLevel getServerLevel() { + return level; + } + // Paper end + // Paper start - If loaded util @Override public FluidState getFluidIfLoaded(BlockPos blockposition) { diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java index c131f6093c395b4d9e401d3c447e7fb13c631ecf..c09a1c640075bde9f656b11258f5adbd2daa4b0b 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java @@ -136,7 +136,7 @@ public class ChunkSerializer { byte b0 = nbttagcompound2.getByte("Y"); if (nbttagcompound2.contains("Palette", 9) && nbttagcompound2.contains("BlockStates", 12)) { - LevelChunkSection chunksection = new LevelChunkSection(b0); + LevelChunkSection chunksection = new LevelChunkSection(b0, null, world, false); // Paper - Anti-Xray - Add parameters chunksection.getStates().read(nbttagcompound2.getList("Palette", 10), nbttagcompound2.getLongArray("BlockStates")); chunksection.recalcBlockCounts(); diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java index 245d764d3dcc549fa8acbd7c9024a3c88d2d2a74..4dd7cea1eec5ec55a3700ce9786da8a513e72a28 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java @@ -46,7 +46,7 @@ public class CraftChunk implements Chunk { private final ServerLevel worldServer; private final int x; private final int z; - private static final PalettedContainer emptyBlockIDs = new LevelChunkSection(0).getStates(); + private static final PalettedContainer emptyBlockIDs = new LevelChunkSection(0, null, null, true).getStates(); // Paper - Anti-Xray - Add parameters private static final byte[] emptyLight = new byte[2048]; public CraftChunk(net.minecraft.world.level.chunk.LevelChunk chunk) { @@ -275,7 +275,7 @@ public class CraftChunk implements Chunk { CompoundTag data = new CompoundTag(); cs[i].getStates().write(data, "Palette", "BlockStates"); - PalettedContainer blockids = new PalettedContainer<>(LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE, net.minecraft.world.level.block.Block.BLOCK_STATE_REGISTRY, NbtUtils::readBlockState, NbtUtils::writeBlockState, Blocks.AIR.defaultBlockState()); // TODO: snapshot whole ChunkSection + PalettedContainer blockids = new PalettedContainer<>(LevelChunkSection.GLOBAL_BLOCKSTATE_PALETTE, net.minecraft.world.level.block.Block.BLOCK_STATE_REGISTRY, NbtUtils::readBlockState, NbtUtils::writeBlockState, Blocks.AIR.defaultBlockState(), null, false); // TODO: snapshot whole ChunkSection // Paper - Anti-Xray - Add no predefined block data and don't initialize because it's done in the line below internally blockids.read(data.getList("Palette", CraftMagicNumbers.NBT.TAG_COMPOUND), data.getLongArray("BlockStates")); sectionBlockIDs[i] = blockids; diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java b/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java index 3d905c98704da64cefd009b2c796b24e729396a5..fe7851476636dfed02339d4d9f93824b96086769 100644 --- a/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java +++ b/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java @@ -22,9 +22,11 @@ public final class CraftChunkData implements ChunkGenerator.ChunkData { private final int maxHeight; private final LevelChunkSection[] sections; private Set tiles; + private World world; // Paper - Anti-Xray - Add world public CraftChunkData(World world) { this(world.getMinHeight(), world.getMaxHeight()); + this.world = world; // Paper - Anti-Xray - Add world } /* pp for tests */ CraftChunkData(int minHeight, int maxHeight) { @@ -162,7 +164,7 @@ public final class CraftChunkData implements ChunkGenerator.ChunkData { int offset = (y - this.minHeight) >> 4; LevelChunkSection section = this.sections[offset]; if (create && section == null) { - this.sections[offset] = section = new LevelChunkSection(offset + (this.minHeight >> 4)); + this.sections[offset] = section = new LevelChunkSection(offset + (this.minHeight >> 4), null, world instanceof org.bukkit.craftbukkit.CraftWorld ? ((org.bukkit.craftbukkit.CraftWorld) world).getHandle() : null, true); // Paper - Anti-Xray - Add parameters } return section; }