Paper/patches/server/0342-Anti-Xray.patch

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2021-11-29 12:55:13 +01:00
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: stonar96 <minecraft.stonar96@gmail.com>
Date: Thu, 25 Nov 2021 13:27:51 +0100
Subject: [PATCH] Anti-Xray
diff --git a/src/main/java/com/destroystokyo/paper/antixray/BitStorageReader.java b/src/main/java/com/destroystokyo/paper/antixray/BitStorageReader.java
new file mode 100644
index 0000000000000000000000000000000000000000..e448c26327b5f6189c3c52e698cff66c8f9ad81a
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/antixray/BitStorageReader.java
@@ -0,0 +1,51 @@
+package com.destroystokyo.paper.antixray;
+
+public final class BitStorageReader {
+
+ private byte[] buffer;
+ private int bits;
+ private int mask;
+ private int longInBufferIndex;
+ private int bitInLongIndex;
+ private long current;
+
+ public void setBuffer(byte[] buffer) {
+ this.buffer = buffer;
+ }
+
+ public void setBits(int bits) {
+ this.bits = bits;
+ mask = (1 << bits) - 1;
+ }
+
+ public void setIndex(int index) {
+ longInBufferIndex = index;
+ bitInLongIndex = 0;
+ init();
+ }
+
+ private void init() {
+ if (buffer.length > longInBufferIndex + 7) {
+ current = ((((long) buffer[longInBufferIndex]) << 56)
+ | (((long) buffer[longInBufferIndex + 1] & 0xff) << 48)
+ | (((long) buffer[longInBufferIndex + 2] & 0xff) << 40)
+ | (((long) buffer[longInBufferIndex + 3] & 0xff) << 32)
+ | (((long) buffer[longInBufferIndex + 4] & 0xff) << 24)
+ | (((long) buffer[longInBufferIndex + 5] & 0xff) << 16)
+ | (((long) buffer[longInBufferIndex + 6] & 0xff) << 8)
+ | (((long) buffer[longInBufferIndex + 7] & 0xff)));
+ }
+ }
+
+ public int read() {
+ if (bitInLongIndex + bits > 64) {
+ bitInLongIndex = 0;
+ longInBufferIndex += 8;
+ init();
+ }
+
+ int value = (int) (current >>> bitInLongIndex) & mask;
+ bitInLongIndex += bits;
+ return value;
+ }
+}
diff --git a/src/main/java/com/destroystokyo/paper/antixray/BitStorageWriter.java b/src/main/java/com/destroystokyo/paper/antixray/BitStorageWriter.java
new file mode 100644
index 0000000000000000000000000000000000000000..e4540ea278f2dc871cb6a3cb8897559bfd65e134
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/antixray/BitStorageWriter.java
@@ -0,0 +1,79 @@
+package com.destroystokyo.paper.antixray;
+
+public final class BitStorageWriter {
+
+ private byte[] buffer;
+ private int bits;
+ private long mask;
+ private int longInBufferIndex;
+ private int bitInLongIndex;
+ private long current;
+ private boolean dirty;
+
+ public void setBuffer(byte[] buffer) {
+ this.buffer = buffer;
+ }
+
+ public void setBits(int bits) {
+ this.bits = bits;
+ mask = (1L << bits) - 1;
+ }
+
+ public void setIndex(int index) {
+ longInBufferIndex = index;
+ bitInLongIndex = 0;
+ init();
+ }
+
+ private void init() {
+ if (buffer.length > longInBufferIndex + 7) {
+ current = ((((long) buffer[longInBufferIndex]) << 56)
+ | (((long) buffer[longInBufferIndex + 1] & 0xff) << 48)
+ | (((long) buffer[longInBufferIndex + 2] & 0xff) << 40)
+ | (((long) buffer[longInBufferIndex + 3] & 0xff) << 32)
+ | (((long) buffer[longInBufferIndex + 4] & 0xff) << 24)
+ | (((long) buffer[longInBufferIndex + 5] & 0xff) << 16)
+ | (((long) buffer[longInBufferIndex + 6] & 0xff) << 8)
+ | (((long) buffer[longInBufferIndex + 7] & 0xff)));
+ }
+
+ dirty = false;
+ }
+
+ public void flush() {
+ if (dirty && buffer.length > longInBufferIndex + 7) {
+ buffer[longInBufferIndex] = (byte) (current >> 56 & 0xff);
+ buffer[longInBufferIndex + 1] = (byte) (current >> 48 & 0xff);
+ buffer[longInBufferIndex + 2] = (byte) (current >> 40 & 0xff);
+ buffer[longInBufferIndex + 3] = (byte) (current >> 32 & 0xff);
+ buffer[longInBufferIndex + 4] = (byte) (current >> 24 & 0xff);
+ buffer[longInBufferIndex + 5] = (byte) (current >> 16 & 0xff);
+ buffer[longInBufferIndex + 6] = (byte) (current >> 8 & 0xff);
+ buffer[longInBufferIndex + 7] = (byte) (current & 0xff);
+ }
+ }
+
+ public void write(int value) {
+ if (bitInLongIndex + bits > 64) {
+ flush();
+ bitInLongIndex = 0;
+ longInBufferIndex += 8;
+ init();
+ }
+
+ current = current & ~(mask << bitInLongIndex) | (value & mask) << bitInLongIndex;
+ dirty = true;
+ bitInLongIndex += bits;
+ }
+
+ public void skip() {
+ bitInLongIndex += bits;
+
+ if (bitInLongIndex > 64) {
+ flush();
+ bitInLongIndex = bits;
+ longInBufferIndex += 8;
+ init();
+ }
+ }
+}
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
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index 0000000000000000000000000000000000000000..52d2e2b744f91914802506e52a07161729bbcf3a
2021-11-29 12:55:13 +01:00
--- /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.ClientboundLevelChunkWithLightPacket;
+import net.minecraft.network.protocol.game.ServerboundPlayerActionPacket;
+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.state.BlockState;
+import net.minecraft.world.level.chunk.LevelChunk;
+
+public class ChunkPacketBlockController {
+
+ public static final ChunkPacketBlockController NO_OPERATION_INSTANCE = new ChunkPacketBlockController();
+
+ protected ChunkPacketBlockController() {
+
+ }
+
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+ public BlockState[] getPresetBlockStates(Level level, ChunkPos chunkPos, int chunkSectionY) {
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+ return null;
+ }
+
+ public boolean shouldModify(ServerPlayer player, LevelChunk chunk) {
+ return false;
+ }
+
+ public ChunkPacketInfo<BlockState> getChunkPacketInfo(ClientboundLevelChunkWithLightPacket chunkPacket, LevelChunk chunk) {
+ return null;
+ }
+
+ public void modifyBlocks(ClientboundLevelChunkWithLightPacket chunkPacket, ChunkPacketInfo<BlockState> chunkPacketInfo) {
+ chunkPacket.setReady(true);
+ }
+
+ public void onBlockChange(Level level, BlockPos blockPos, BlockState newBlockState, BlockState oldBlockState, int flags, int maxUpdateDepth) {
+
+ }
+
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+ public void onPlayerLeftClickBlock(ServerPlayerGameMode serverPlayerGameMode, BlockPos blockPos, ServerboundPlayerActionPacket.Action action, Direction direction, int worldHeight, int sequence) {
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+
+ }
+}
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
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index 0000000000000000000000000000000000000000..42fdce97d99618a53f2e9c51804ff2205b574f69
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--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java
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@@ -0,0 +1,672 @@
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+package com.destroystokyo.paper.antixray;
+
+import io.papermc.paper.configuration.WorldConfiguration;
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+import io.papermc.paper.configuration.type.EngineMode;
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+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
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+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.core.registries.Registries;
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+import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
+import net.minecraft.network.protocol.game.ServerboundPlayerActionPacket;
+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;
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+import net.minecraft.world.level.biome.Biomes;
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+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.EntityBlock;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.*;
+import org.bukkit.Bukkit;
+
+import java.util.*;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.function.IntSupplier;
+
+public final class ChunkPacketBlockControllerAntiXray extends ChunkPacketBlockController {
+
+ private static final Palette<BlockState> GLOBAL_BLOCKSTATE_PALETTE = new GlobalPalette<>(Block.BLOCK_STATE_REGISTRY);
+ private static final LevelChunkSection EMPTY_SECTION = null;
+ private final Executor executor;
+ private final EngineMode engineMode;
+ private final int maxBlockHeight;
+ private final int updateRadius;
+ private final boolean usePermission;
+ private final BlockState[] presetBlockStates;
+ private final BlockState[] presetBlockStatesFull;
+ private final BlockState[] presetBlockStatesStone;
+ private final BlockState[] presetBlockStatesDeepslate;
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+ private final BlockState[] presetBlockStatesNetherrack;
+ private final BlockState[] presetBlockStatesEndStone;
+ private final int[] presetBlockStateBitsGlobal;
+ private final int[] presetBlockStateBitsStoneGlobal;
+ private final int[] presetBlockStateBitsDeepslateGlobal;
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+ private final int[] presetBlockStateBitsNetherrackGlobal;
+ private final int[] presetBlockStateBitsEndStoneGlobal;
+ 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 = {EMPTY_SECTION, EMPTY_SECTION, EMPTY_SECTION, EMPTY_SECTION};
+ private final int maxBlockHeightUpdatePosition;
+
+ public ChunkPacketBlockControllerAntiXray(Level level, Executor executor) {
+ this.executor = executor;
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+ WorldConfiguration.Anticheat.AntiXray paperWorldConfig = level.paperConfig().anticheat.antiXray;
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+ engineMode = paperWorldConfig.engineMode;
+ maxBlockHeight = paperWorldConfig.maxBlockHeight >> 4 << 4;
+ updateRadius = paperWorldConfig.updateRadius;
+ usePermission = paperWorldConfig.usePermission;
+ List<String> toObfuscate;
+
+ if (engineMode == EngineMode.HIDE) {
+ toObfuscate = paperWorldConfig.hiddenBlocks;
+ presetBlockStates = null;
+ presetBlockStatesFull = null;
+ presetBlockStatesStone = new BlockState[]{Blocks.STONE.defaultBlockState()};
+ presetBlockStatesDeepslate = new BlockState[]{Blocks.DEEPSLATE.defaultBlockState()};
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+ presetBlockStatesNetherrack = new BlockState[]{Blocks.NETHERRACK.defaultBlockState()};
+ presetBlockStatesEndStone = new BlockState[]{Blocks.END_STONE.defaultBlockState()};
+ presetBlockStateBitsGlobal = null;
+ presetBlockStateBitsStoneGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.STONE.defaultBlockState())};
+ presetBlockStateBitsDeepslateGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.DEEPSLATE.defaultBlockState())};
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+ presetBlockStateBitsNetherrackGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.NETHERRACK.defaultBlockState())};
+ presetBlockStateBitsEndStoneGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.END_STONE.defaultBlockState())};
+ } else {
+ toObfuscate = new ArrayList<>(paperWorldConfig.replacementBlocks);
+ List<BlockState> presetBlockStateList = new LinkedList<>();
+
+ for (String id : paperWorldConfig.hiddenBlocks) {
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+ Block block = BuiltInRegistries.BLOCK.getOptional(new ResourceLocation(id)).orElse(null);
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+
+ if (block != null && !(block instanceof EntityBlock)) {
+ toObfuscate.add(id);
+ presetBlockStateList.add(block.defaultBlockState());
+ }
+ }
+
+ // The doc of the LinkedHashSet(Collection<? extends E>) constructor doesn't specify that the insertion order is the predictable iteration order of the specified Collection, although it is in the implementation
+ Set<BlockState> presetBlockStateSet = new LinkedHashSet<>();
+ // Therefore addAll(Collection<? extends E>) is used, which guarantees this order in the doc
+ presetBlockStateSet.addAll(presetBlockStateList);
+ presetBlockStates = presetBlockStateSet.isEmpty() ? new BlockState[]{Blocks.DIAMOND_ORE.defaultBlockState()} : presetBlockStateSet.toArray(new BlockState[0]);
+ presetBlockStatesFull = presetBlockStateSet.isEmpty() ? new BlockState[]{Blocks.DIAMOND_ORE.defaultBlockState()} : presetBlockStateList.toArray(new BlockState[0]);
+ presetBlockStatesStone = null;
+ presetBlockStatesDeepslate = null;
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+ presetBlockStatesNetherrack = null;
+ presetBlockStatesEndStone = null;
+ presetBlockStateBitsGlobal = new int[presetBlockStatesFull.length];
+
+ for (int i = 0; i < presetBlockStatesFull.length; i++) {
+ presetBlockStateBitsGlobal[i] = GLOBAL_BLOCKSTATE_PALETTE.idFor(presetBlockStatesFull[i]);
+ }
+
+ presetBlockStateBitsStoneGlobal = null;
+ presetBlockStateBitsDeepslateGlobal = null;
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+ presetBlockStateBitsNetherrackGlobal = null;
+ presetBlockStateBitsEndStoneGlobal = null;
+ }
+
+ for (String id : toObfuscate) {
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+ Block block = BuiltInRegistries.BLOCK.getOptional(new ResourceLocation(id)).orElse(null);
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+
+ // 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 blockState : block.getStateDefinition().getPossibleStates()) {
+ obfuscateGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(blockState)] = true;
+ }
+ }
+ }
+
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+ EmptyLevelChunk emptyChunk = new EmptyLevelChunk(level, new ChunkPos(0, 0), MinecraftServer.getServer().registryAccess().registryOrThrow(Registries.BIOME).getHolderOrThrow(Biomes.PLAINS));
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+ BlockPos zeroPos = new BlockPos(0, 0, 0);
+
+ for (int i = 0; i < solidGlobal.length; i++) {
+ BlockState blockState = GLOBAL_BLOCKSTATE_PALETTE.valueFor(i);
+
+ if (blockState != null) {
+ solidGlobal[i] = blockState.isRedstoneConductor(emptyChunk, zeroPos)
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+ && blockState.getBlock() != Blocks.SPAWNER && blockState.getBlock() != Blocks.BARRIER && blockState.getBlock() != Blocks.SHULKER_BOX && blockState.getBlock() != Blocks.SLIME_BLOCK && blockState.getBlock() != Blocks.MANGROVE_ROOTS || paperWorldConfig.lavaObscures && blockState == Blocks.LAVA.defaultBlockState();
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+ // Comparing blockState == Blocks.LAVA.defaultBlockState() instead of blockState.getBlock() == Blocks.LAVA ensures that only "stationary lava" is used
+ // shulker box checks TE.
+ }
+ }
+
+ maxBlockHeightUpdatePosition = maxBlockHeight + updateRadius - 1;
+ }
+
+ private int getPresetBlockStatesFullLength() {
+ return engineMode == EngineMode.HIDE ? 1 : presetBlockStatesFull.length;
+ }
+
+ @Override
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+ public BlockState[] getPresetBlockStates(Level level, ChunkPos chunkPos, int chunkSectionY) {
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+ // Return the block states to be added to the paletted containers so that they can be used for obfuscation
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+ int bottomBlockY = chunkSectionY << 4;
+
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+ if (bottomBlockY < maxBlockHeight) {
+ if (engineMode == EngineMode.HIDE) {
+ return switch (level.getWorld().getEnvironment()) {
+ case NETHER -> presetBlockStatesNetherrack;
+ case THE_END -> presetBlockStatesEndStone;
+ default -> bottomBlockY < 0 ? presetBlockStatesDeepslate : presetBlockStatesStone;
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+ };
+ }
+
+ return presetBlockStates;
+ }
+
+ return null;
+ }
+
+ @Override
+ public boolean shouldModify(ServerPlayer player, LevelChunk chunk) {
+ return !usePermission || !player.getBukkitEntity().hasPermission("paper.antixray.bypass");
+ }
+
+ @Override
+ public ChunkPacketInfoAntiXray getChunkPacketInfo(ClientboundLevelChunkWithLightPacket 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
+ return new ChunkPacketInfoAntiXray(chunkPacket, chunk, this);
+ }
+
+ @Override
+ public void modifyBlocks(ClientboundLevelChunkWithLightPacket chunkPacket, ChunkPacketInfo<BlockState> chunkPacketInfo) {
+ if (!(chunkPacketInfo instanceof ChunkPacketInfoAntiXray)) {
+ chunkPacket.setReady(true);
+ return;
+ }
+
+ if (!Bukkit.isPrimaryThread()) {
+ // Plugins?
+ MinecraftServer.getServer().scheduleOnMain(() -> modifyBlocks(chunkPacket, chunkPacketInfo));
+ return;
+ }
+
+ LevelChunk chunk = chunkPacketInfo.getChunk();
+ int x = chunk.getPos().x;
+ int z = chunk.getPos().z;
+ Level level = chunk.getLevel();
+ ((ChunkPacketInfoAntiXray) chunkPacketInfo).setNearbyChunks(level.getChunkIfLoaded(x - 1, z), level.getChunkIfLoaded(x + 1, z), level.getChunkIfLoaded(x, z - 1), level.getChunkIfLoaded(x, z + 1));
+ executor.execute((Runnable) 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<int[]> presetBlockStateBits = ThreadLocal.withInitial(() -> new int[getPresetBlockStatesFullLength()]);
+ private static final ThreadLocal<boolean[]> SOLID = ThreadLocal.withInitial(() -> new boolean[Block.BLOCK_STATE_REGISTRY.size()]);
+ private static final ThreadLocal<boolean[]> 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<boolean[][]> CURRENT = ThreadLocal.withInitial(() -> new boolean[16][16]);
+ private static final ThreadLocal<boolean[][]> NEXT = ThreadLocal.withInitial(() -> new boolean[16][16]);
+ private static final ThreadLocal<boolean[][]> NEXT_NEXT = ThreadLocal.withInitial(() -> new boolean[16][16]);
+
+ public void obfuscate(ChunkPacketInfoAntiXray chunkPacketInfoAntiXray) {
+ int[] presetBlockStateBits = this.presetBlockStateBits.get();
+ boolean[] solid = SOLID.get();
+ boolean[] obfuscate = OBFUSCATE.get();
+ boolean[][] current = CURRENT.get();
+ boolean[][] next = NEXT.get();
+ boolean[][] nextNext = NEXT_NEXT.get();
+ // bitStorageReader, bitStorageWriter and nearbyChunkSections could also be reused (with ThreadLocal if necessary) but it's not worth it
+ BitStorageReader bitStorageReader = new BitStorageReader();
+ BitStorageWriter bitStorageWriter = new BitStorageWriter();
+ LevelChunkSection[] nearbyChunkSections = new LevelChunkSection[4];
+ LevelChunk chunk = chunkPacketInfoAntiXray.getChunk();
+ Level level = chunk.getLevel();
+ int maxChunkSectionIndex = Math.min((maxBlockHeight >> 4) - chunk.getMinSection(), chunk.getSectionsCount()) - 1;
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+ boolean[] solidTemp = null;
+ boolean[] obfuscateTemp = null;
+ bitStorageReader.setBuffer(chunkPacketInfoAntiXray.getBuffer());
+ bitStorageWriter.setBuffer(chunkPacketInfoAntiXray.getBuffer());
+ int numberOfBlocks = presetBlockStateBits.length;
+ // Keep the lambda expressions as simple as possible. They are used very frequently.
+ LayeredIntSupplier random = numberOfBlocks == 1 ? (() -> 0) : engineMode == EngineMode.OBFUSCATE_LAYER ? new LayeredIntSupplier() {
+ // engine-mode: 3
+ private int state;
+ private int next;
+
+ {
+ while ((state = ThreadLocalRandom.current().nextInt()) == 0) ;
+ }
+
+ @Override
+ public void nextLayer() {
+ // https://en.wikipedia.org/wiki/Xorshift
+ state ^= state << 13;
+ state ^= state >>> 17;
+ state ^= state << 5;
+ // https://www.pcg-random.org/posts/bounded-rands.html
+ next = (int) ((Integer.toUnsignedLong(state) * numberOfBlocks) >>> 32);
+ }
+
+ @Override
+ public int getAsInt() {
+ return next;
+ }
+ } : new LayeredIntSupplier() {
+ // engine-mode: 2
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+ 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.getPresetValues(chunkSectionIndex) != null) {
+ int[] presetBlockStateBitsTemp;
+
+ if (chunkPacketInfoAntiXray.getPalette(chunkSectionIndex) instanceof GlobalPalette) {
+ if (engineMode == EngineMode.HIDE) {
+ presetBlockStateBitsTemp = switch (level.getWorld().getEnvironment()) {
+ case NETHER -> presetBlockStateBitsNetherrackGlobal;
+ case THE_END -> presetBlockStateBitsEndStoneGlobal;
+ default -> chunkSectionIndex + chunk.getMinSection() < 0 ? presetBlockStateBitsDeepslateGlobal : presetBlockStateBitsStoneGlobal;
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+ };
+ } else {
+ presetBlockStateBitsTemp = presetBlockStateBitsGlobal;
+ }
+ } else {
+ // If it's presetBlockStates, use this.presetBlockStatesFull instead
+ BlockState[] presetBlockStatesFull = chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex) == presetBlockStates ? this.presetBlockStatesFull : chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex);
+ presetBlockStateBitsTemp = presetBlockStateBits;
+
+ for (int i = 0; i < presetBlockStateBitsTemp.length; i++) {
+ // This is thread safe because we only request IDs that are guaranteed to be in the palette and are visible
+ // For more details see the comments in the readPalette method
+ presetBlockStateBitsTemp[i] = chunkPacketInfoAntiXray.getPalette(chunkSectionIndex).idFor(presetBlockStatesFull[i]);
+ }
+ }
+
+ bitStorageWriter.setIndex(chunkPacketInfoAntiXray.getIndex(chunkSectionIndex));
+
+ // Check if the chunk section below was not obfuscated
+ if (chunkSectionIndex == 0 || !chunkPacketInfoAntiXray.isWritten(chunkSectionIndex - 1) || chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex - 1) == null) {
+ // If so, initialize some stuff
+ bitStorageReader.setBits(chunkPacketInfoAntiXray.getBits(chunkSectionIndex));
+ bitStorageReader.setIndex(chunkPacketInfoAntiXray.getIndex(chunkSectionIndex));
+ solidTemp = readPalette(chunkPacketInfoAntiXray.getPalette(chunkSectionIndex), solid, solidGlobal);
+ obfuscateTemp = readPalette(chunkPacketInfoAntiXray.getPalette(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 = chunk.getSections()[chunkSectionIndex - 1]) == EMPTY_SECTION;
+
+ for (int z = 0; z < 16; z++) {
+ for (int x = 0; x < 16; x++) {
+ current[z][x] = true;
+ next[z][x] = skipFirstLayer || isTransparent(belowChunkSection, x, 15, z);
+ }
+ }
+
+ // Abuse the obfuscateLayer method to read the blocks of the first layer of the current chunk section
+ bitStorageWriter.setBits(0);
+ obfuscateLayer(-1, bitStorageReader, bitStorageWriter, solidTemp, obfuscateTemp, presetBlockStateBitsTemp, current, next, nextNext, emptyNearbyChunkSections, random);
+ }
+
+ bitStorageWriter.setBits(chunkPacketInfoAntiXray.getBits(chunkSectionIndex));
+ nearbyChunkSections[0] = chunkPacketInfoAntiXray.getNearbyChunks()[0] == null ? EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[0].getSections()[chunkSectionIndex];
+ nearbyChunkSections[1] = chunkPacketInfoAntiXray.getNearbyChunks()[1] == null ? EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[1].getSections()[chunkSectionIndex];
+ nearbyChunkSections[2] = chunkPacketInfoAntiXray.getNearbyChunks()[2] == null ? EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[2].getSections()[chunkSectionIndex];
+ nearbyChunkSections[3] = chunkPacketInfoAntiXray.getNearbyChunks()[3] == null ? 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;
+ random.nextLayer();
2021-11-29 12:55:13 +01:00
+ obfuscateLayer(y, bitStorageReader, bitStorageWriter, solidTemp, obfuscateTemp, presetBlockStateBitsTemp, current, next, nextNext, nearbyChunkSections, random);
+ }
+
+ // Check if the chunk section above doesn't need obfuscation
+ if (chunkSectionIndex == maxChunkSectionIndex || !chunkPacketInfoAntiXray.isWritten(chunkSectionIndex + 1) || chunkPacketInfoAntiXray.getPresetValues(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 != chunk.getSectionsCount() - 1 && (aboveChunkSection = chunk.getSections()[chunkSectionIndex + 1]) != 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 (isTransparent(aboveChunkSection, x, 0, z)) {
+ current[z][x] = true;
+ }
+ }
+ }
+
+ // There is nothing to read anymore
+ bitStorageReader.setBits(0);
+ solid[0] = true;
+ random.nextLayer();
2021-11-29 12:55:13 +01:00
+ obfuscateLayer(15, bitStorageReader, bitStorageWriter, solid, obfuscateTemp, presetBlockStateBitsTemp, 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
+ bitStorageReader.setBits(chunkPacketInfoAntiXray.getBits(chunkSectionIndex + 1));
+ bitStorageReader.setIndex(chunkPacketInfoAntiXray.getIndex(chunkSectionIndex + 1));
+ solidTemp = readPalette(chunkPacketInfoAntiXray.getPalette(chunkSectionIndex + 1), solid, solidGlobal);
+ obfuscateTemp = readPalette(chunkPacketInfoAntiXray.getPalette(chunkSectionIndex + 1), obfuscate, obfuscateGlobal);
+ boolean[][] temp = current;
+ current = next;
+ next = nextNext;
+ nextNext = temp;
+ random.nextLayer();
2021-11-29 12:55:13 +01:00
+ obfuscateLayer(15, bitStorageReader, bitStorageWriter, solidTemp, obfuscateTemp, presetBlockStateBitsTemp, current, next, nextNext, nearbyChunkSections, random);
+ }
+
+ bitStorageWriter.flush();
+ }
+ }
+
+ chunkPacketInfoAntiXray.getChunkPacket().setReady(true);
+ }
+
+ private void obfuscateLayer(int y, BitStorageReader bitStorageReader, BitStorageWriter bitStorageWriter, boolean[] solid, boolean[] obfuscate, int[] presetBlockStateBits, boolean[][] current, boolean[][] next, boolean[][] nextNext, LevelChunkSection[] nearbyChunkSections, IntSupplier random) {
+ // First block of first line
+ int bits = bitStorageReader.read();
+
+ if (nextNext[0][0] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[0][1] = true;
+ next[1][0] = true;
+ } else {
+ if (current[0][0] || isTransparent(nearbyChunkSections[2], 0, y, 15) || isTransparent(nearbyChunkSections[0], 15, y, 0)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[0][0] = true;
+ }
+
+ // First line
+ for (int x = 1; x < 15; x++) {
+ bits = bitStorageReader.read();
+
+ if (nextNext[0][x] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[0][x - 1] = true;
+ next[0][x + 1] = true;
+ next[1][x] = true;
+ } else {
+ if (current[0][x] || isTransparent(nearbyChunkSections[2], x, y, 15)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[0][x] = true;
+ }
+ }
+
+ // Last block of first line
+ bits = bitStorageReader.read();
+
+ if (nextNext[0][15] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[0][14] = true;
+ next[1][15] = true;
+ } else {
+ if (current[0][15] || isTransparent(nearbyChunkSections[2], 15, y, 15) || isTransparent(nearbyChunkSections[1], 0, y, 0)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[0][15] = true;
+ }
+
+ // All inner lines
+ for (int z = 1; z < 15; z++) {
+ // First block
+ bits = bitStorageReader.read();
+
+ if (nextNext[z][0] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[z][1] = true;
+ next[z - 1][0] = true;
+ next[z + 1][0] = true;
+ } else {
+ if (current[z][0] || isTransparent(nearbyChunkSections[0], 15, y, z)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[z][0] = true;
+ }
+
+ // All inner blocks
+ for (int x = 1; x < 15; x++) {
+ bits = bitStorageReader.read();
+
+ if (nextNext[z][x] = !solid[bits]) {
+ bitStorageWriter.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]) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[z][x] = true;
+ }
+ }
+
+ // Last block
+ bits = bitStorageReader.read();
+
+ if (nextNext[z][15] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[z][14] = true;
+ next[z - 1][15] = true;
+ next[z + 1][15] = true;
+ } else {
+ if (current[z][15] || isTransparent(nearbyChunkSections[1], 0, y, z)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[z][15] = true;
+ }
+ }
+
+ // First block of last line
+ bits = bitStorageReader.read();
+
+ if (nextNext[15][0] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[15][1] = true;
+ next[14][0] = true;
+ } else {
+ if (current[15][0] || isTransparent(nearbyChunkSections[3], 0, y, 0) || isTransparent(nearbyChunkSections[0], 15, y, 15)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[15][0] = true;
+ }
+
+ // Last line
+ for (int x = 1; x < 15; x++) {
+ bits = bitStorageReader.read();
+
+ if (nextNext[15][x] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[15][x - 1] = true;
+ next[15][x + 1] = true;
+ next[14][x] = true;
+ } else {
+ if (current[15][x] || isTransparent(nearbyChunkSections[3], x, y, 0)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[15][x] = true;
+ }
+ }
+
+ // Last block of last line
+ bits = bitStorageReader.read();
+
+ if (nextNext[15][15] = !solid[bits]) {
+ bitStorageWriter.skip();
+ next[15][14] = true;
+ next[14][15] = true;
+ } else {
+ if (current[15][15] || isTransparent(nearbyChunkSections[3], 15, y, 0) || isTransparent(nearbyChunkSections[1], 0, y, 15)) {
+ bitStorageWriter.skip();
+ } else {
+ bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
+ }
+ }
+
+ if (!obfuscate[bits]) {
+ next[15][15] = true;
+ }
+ }
+
+ private boolean isTransparent(LevelChunkSection chunkSection, int x, int y, int z) {
+ if (chunkSection == EMPTY_SECTION) {
+ return true;
+ }
+
+ try {
+ return !solidGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(chunkSection.getBlockState(x, y, z))];
+ } catch (MissingPaletteEntryException e) {
+ // Race condition / visibility issue / no happens-before relationship
+ // We don't care and treat the block as transparent
+ // Internal implementation details of PalettedContainer, LinearPalette, HashMapPalette, CrudeIncrementalIntIdentityHashBiMap, ... guarantee us that no (other) exceptions will occur
+ return true;
+ }
+ }
+
+ private boolean[] readPalette(Palette<BlockState> palette, boolean[] temp, boolean[] global) {
+ if (palette instanceof GlobalPalette) {
+ return global;
+ }
+
+ try {
+ for (int i = 0; i < palette.getSize(); i++) {
+ temp[i] = global[GLOBAL_BLOCKSTATE_PALETTE.idFor(palette.valueFor(i))];
+ }
+ } catch (MissingPaletteEntryException e) {
+ // Race condition / visibility issue / no happens-before relationship
+ // We don't care because we at least see the state as it was when the chunk packet was created
+ // Internal implementation details of PalettedContainer, LinearPalette, HashMapPalette, CrudeIncrementalIntIdentityHashBiMap, ... guarantee us that no (other) exceptions will occur until we have all the data that we need here
+ // Since all palettes have a fixed initial maximum size and there is no internal restructuring and no values are removed from palettes, we are also guaranteed to see the data
+ }
+
+ return temp;
+ }
+
+ @Override
+ public void onBlockChange(Level level, BlockPos blockPos, BlockState newBlockState, BlockState oldBlockState, int flags, int maxUpdateDepth) {
+ if (oldBlockState != null && solidGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(oldBlockState)] && !solidGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(newBlockState)] && blockPos.getY() <= maxBlockHeightUpdatePosition) {
+ updateNearbyBlocks(level, blockPos);
+ }
+ }
+
+ @Override
2022-07-18 12:30:31 +02:00
+ public void onPlayerLeftClickBlock(ServerPlayerGameMode serverPlayerGameMode, BlockPos blockPos, ServerboundPlayerActionPacket.Action action, Direction direction, int worldHeight, int sequence) {
2021-11-29 12:55:13 +01:00
+ if (blockPos.getY() <= maxBlockHeightUpdatePosition) {
+ updateNearbyBlocks(serverPlayerGameMode.level, blockPos);
+ }
+ }
+
+ private void updateNearbyBlocks(Level level, BlockPos blockPos) {
+ if (updateRadius >= 2) {
+ BlockPos temp = blockPos.west();
+ updateBlock(level, temp);
+ updateBlock(level, temp.west());
+ updateBlock(level, temp.below());
+ updateBlock(level, temp.above());
+ updateBlock(level, temp.north());
+ updateBlock(level, temp.south());
+ updateBlock(level, temp = blockPos.east());
+ updateBlock(level, temp.east());
+ updateBlock(level, temp.below());
+ updateBlock(level, temp.above());
+ updateBlock(level, temp.north());
+ updateBlock(level, temp.south());
+ updateBlock(level, temp = blockPos.below());
+ updateBlock(level, temp.below());
+ updateBlock(level, temp.north());
+ updateBlock(level, temp.south());
+ updateBlock(level, temp = blockPos.above());
+ updateBlock(level, temp.above());
+ updateBlock(level, temp.north());
+ updateBlock(level, temp.south());
+ updateBlock(level, temp = blockPos.north());
+ updateBlock(level, temp.north());
+ updateBlock(level, temp = blockPos.south());
+ updateBlock(level, temp.south());
+ } else if (updateRadius == 1) {
+ updateBlock(level, blockPos.west());
+ updateBlock(level, blockPos.east());
+ updateBlock(level, blockPos.below());
+ updateBlock(level, blockPos.above());
+ updateBlock(level, blockPos.north());
+ updateBlock(level, blockPos.south());
+ } else {
+ // Do nothing if updateRadius <= 0 (test mode)
+ }
+ }
+
+ private void updateBlock(Level level, BlockPos blockPos) {
+ BlockState blockState = level.getBlockStateIfLoaded(blockPos);
2021-11-29 12:55:13 +01:00
+
+ if (blockState != null && obfuscateGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(blockState)]) {
+ ((ServerLevel) level).getChunkSource().blockChanged(blockPos);
+ }
+ }
+
+ @FunctionalInterface
+ private interface LayeredIntSupplier extends IntSupplier {
+ default void nextLayer() {
+
+ }
+ }
2021-11-29 12:55:13 +01:00
+}
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..d98a3f5c54c67a673eb7dc456dd039cd78f9c34d
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfo.java
@@ -0,0 +1,80 @@
+package com.destroystokyo.paper.antixray;
+
+import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.Palette;
+
+public class ChunkPacketInfo<T> {
+
+ private final ClientboundLevelChunkWithLightPacket chunkPacket;
+ private final LevelChunk chunk;
+ private final int[] bits;
+ private final Object[] palettes;
+ private final int[] indexes;
+ private final Object[][] presetValues;
+ private byte[] buffer;
+
+ public ChunkPacketInfo(ClientboundLevelChunkWithLightPacket chunkPacket, LevelChunk chunk) {
+ this.chunkPacket = chunkPacket;
+ this.chunk = chunk;
+ int sections = chunk.getSectionsCount();
+ bits = new int[sections];
+ palettes = new Object[sections];
+ indexes = new int[sections];
+ presetValues = new Object[sections][];
+ }
+
+ public ClientboundLevelChunkWithLightPacket getChunkPacket() {
+ return chunkPacket;
+ }
+
+ public LevelChunk getChunk() {
+ return chunk;
+ }
+
+ public byte[] getBuffer() {
+ return buffer;
+ }
+
+ public void setBuffer(byte[] buffer) {
+ this.buffer = buffer;
+ }
+
+ public int getBits(int chunkSectionIndex) {
+ return bits[chunkSectionIndex];
+ }
+
+ public void setBits(int chunkSectionIndex, int bits) {
+ this.bits[chunkSectionIndex] = bits;
+ }
+
+ @SuppressWarnings("unchecked")
+ public Palette<T> getPalette(int chunkSectionIndex) {
+ return (Palette<T>) palettes[chunkSectionIndex];
+ }
+
+ public void setPalette(int chunkSectionIndex, Palette<T> palette) {
+ palettes[chunkSectionIndex] = palette;
+ }
+
+ public int getIndex(int chunkSectionIndex) {
+ return indexes[chunkSectionIndex];
+ }
+
+ public void setIndex(int chunkSectionIndex, int index) {
+ indexes[chunkSectionIndex] = index;
+ }
+
+ @SuppressWarnings("unchecked")
+ public T[] getPresetValues(int chunkSectionIndex) {
+ return (T[]) presetValues[chunkSectionIndex];
+ }
+
+ public void setPresetValues(int chunkSectionIndex, T[] presetValues) {
+ this.presetValues[chunkSectionIndex] = presetValues;
+ }
+
+ public boolean isWritten(int chunkSectionIndex) {
+ return bits[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..80a2dfb266ae1221680a7b24fee2f7e2a8330b7d
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketInfoAntiXray.java
@@ -0,0 +1,29 @@
+package com.destroystokyo.paper.antixray;
+
+import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.LevelChunk;
+
+public final class ChunkPacketInfoAntiXray extends ChunkPacketInfo<BlockState> implements Runnable {
+
+ private final ChunkPacketBlockControllerAntiXray chunkPacketBlockControllerAntiXray;
+ private LevelChunk[] nearbyChunks;
+
+ public ChunkPacketInfoAntiXray(ClientboundLevelChunkWithLightPacket chunkPacket, LevelChunk chunk, ChunkPacketBlockControllerAntiXray chunkPacketBlockControllerAntiXray) {
+ super(chunkPacket, chunk);
+ this.chunkPacketBlockControllerAntiXray = chunkPacketBlockControllerAntiXray;
+ }
+
+ public LevelChunk[] getNearbyChunks() {
+ return nearbyChunks;
+ }
+
+ public void setNearbyChunks(LevelChunk... nearbyChunks) {
+ this.nearbyChunks = nearbyChunks;
+ }
+
+ @Override
+ public void run() {
+ chunkPacketBlockControllerAntiXray.obfuscate(this);
+ }
+}
2023-03-15 01:21:35 +01:00
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundChunksBiomesPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundChunksBiomesPacket.java
2023-06-09 06:29:58 +02:00
index 6cff1a98dc7cf33947ec760dbc3d3d0ec5db5f6c..51f647de153255c919b1440338cf1b3e2d6b5dbf 100644
2023-03-15 01:21:35 +01:00
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundChunksBiomesPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundChunksBiomesPacket.java
2023-06-09 06:29:58 +02:00
@@ -63,8 +63,10 @@ public record ClientboundChunksBiomesPacket(List<ClientboundChunksBiomesPacket.C
}
2023-03-15 01:21:35 +01:00
public static void extractChunkData(FriendlyByteBuf buf, LevelChunk chunk) {
2023-06-09 06:29:58 +02:00
+ int chunkSectionIndex = 0; // Paper - Anti-Xray
2023-03-15 01:21:35 +01:00
for(LevelChunkSection levelChunkSection : chunk.getSections()) {
- levelChunkSection.getBiomes().write(buf);
2023-06-09 06:29:58 +02:00
+ levelChunkSection.getBiomes().write(buf, null, chunkSectionIndex); // Paper - Anti-Xray
+ chunkSectionIndex++; // Paper - Anti-Xray
2023-03-15 01:21:35 +01:00
}
}
2021-11-29 12:55:13 +01:00
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
index 0711ad682206e783fd0a1e566828670321f297e2..bf6cdc08367fc26716e7904162a21e63fecab3ed 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
@@ -33,7 +33,10 @@ public class ClientboundLevelChunkPacketData {
}
// Paper end
- public ClientboundLevelChunkPacketData(LevelChunk chunk) {
+ // Paper start - Anti-Xray - Add chunk packet info
2022-07-18 12:30:31 +02:00
+ @Deprecated @io.papermc.paper.annotation.DoNotUse public ClientboundLevelChunkPacketData(LevelChunk chunk) { this(chunk, null); }
2021-11-29 12:55:13 +01:00
+ public ClientboundLevelChunkPacketData(LevelChunk chunk, com.destroystokyo.paper.antixray.ChunkPacketInfo<net.minecraft.world.level.block.state.BlockState> chunkPacketInfo) {
+ // Paper end
this.heightmaps = new CompoundTag();
2022-05-29 21:54:25 +02:00
for(Map.Entry<Heightmap.Types, Heightmap> entry : chunk.getHeightmaps()) {
2022-07-18 12:30:31 +02:00
@@ -43,7 +46,14 @@ public class ClientboundLevelChunkPacketData {
2021-11-29 12:55:13 +01:00
}
this.buffer = new byte[calculateChunkSize(chunk)];
- extractChunkData(new FriendlyByteBuf(this.getWriteBuffer()), chunk);
2022-07-18 12:30:31 +02:00
+
2021-11-29 12:55:13 +01:00
+ // Paper start - Anti-Xray - Add chunk packet info
+ if (chunkPacketInfo != null) {
+ chunkPacketInfo.setBuffer(this.buffer);
+ }
+
+ extractChunkData(new FriendlyByteBuf(this.getWriteBuffer()), chunk, chunkPacketInfo);
+ // Paper end
this.blockEntitiesData = Lists.newArrayList();
int totalTileEntities = 0; // Paper
2023-06-09 06:29:58 +02:00
@@ -103,9 +113,15 @@ public class ClientboundLevelChunkPacketData {
2021-11-29 12:55:13 +01:00
return byteBuf;
}
- public static void extractChunkData(FriendlyByteBuf buf, LevelChunk chunk) {
+ // Paper start - Anti-Xray - Add chunk packet info
2022-07-18 12:30:31 +02:00
+ @Deprecated @io.papermc.paper.annotation.DoNotUse public static void extractChunkData(FriendlyByteBuf buf, LevelChunk chunk) { ClientboundLevelChunkPacketData.extractChunkData(buf, chunk, null); }
2021-11-29 12:55:13 +01:00
+ public static void extractChunkData(FriendlyByteBuf buf, LevelChunk chunk, com.destroystokyo.paper.antixray.ChunkPacketInfo<net.minecraft.world.level.block.state.BlockState> chunkPacketInfo) {
2023-06-09 06:29:58 +02:00
+ int chunkSectionIndex = 0;
+
2021-11-29 12:55:13 +01:00
for(LevelChunkSection levelChunkSection : chunk.getSections()) {
- levelChunkSection.write(buf);
2023-06-09 06:29:58 +02:00
+ levelChunkSection.write(buf, chunkPacketInfo, chunkSectionIndex);
+ chunkSectionIndex++;
2021-11-29 12:55:13 +01:00
+ // Paper end
}
}
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java
index be89e5b8c1ea7f85aef267a15986affa5fa1fd4b..43472855136f26b282d94fd241853d862a19ae17 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java
@@ -13,13 +13,30 @@ public class ClientboundLevelChunkWithLightPacket implements Packet<ClientGamePa
private final int z;
private final ClientboundLevelChunkPacketData chunkData;
private final ClientboundLightUpdatePacketData lightData;
+ // Paper start - Async-Anti-Xray - Ready flag for the connection
+ private volatile boolean ready;
2023-06-09 06:29:58 +02:00
- public ClientboundLevelChunkWithLightPacket(LevelChunk chunk, LevelLightEngine lightProvider, @Nullable BitSet skyBits, @Nullable BitSet blockBits) {
2021-11-29 12:55:13 +01:00
+ @Override
+ public boolean isReady() {
+ return this.ready;
+ }
+
+ public void setReady(boolean ready) {
+ this.ready = ready;
+ }
+ // Paper end
+
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2022-06-08 05:40:53 +02:00
public void destroyAndAck(BlockPos pos, int sequence, String reason) {
diff --git a/src/main/java/net/minecraft/server/network/PlayerChunkSender.java b/src/main/java/net/minecraft/server/network/PlayerChunkSender.java
index 5de5209e04d631bd6a50e28e8d3abebf148252c1..19b3f4fa7678a038bf25efc2a8b46ddad0193fde 100644
--- a/src/main/java/net/minecraft/server/network/PlayerChunkSender.java
+++ b/src/main/java/net/minecraft/server/network/PlayerChunkSender.java
@@ -85,7 +85,10 @@ public class PlayerChunkSender {
public static void sendChunk(ServerGamePacketListenerImpl handler, ServerLevel world, LevelChunk chunk) { // Paper - rewrite chunk loader - public
handler.player.serverLevel().chunkSource.chunkMap.getVisibleChunkIfPresent(chunk.getPos().toLong()).addPlayer(handler.player);
- handler.send(new ClientboundLevelChunkWithLightPacket(chunk, world.getLightEngine(), (BitSet)null, (BitSet)null));
+ // Paper start - Anti-Xray
+ final boolean shouldModify = world.chunkPacketBlockController.shouldModify(handler.player, chunk);
+ handler.send(new ClientboundLevelChunkWithLightPacket(chunk, world.getLightEngine(), (BitSet)null, (BitSet)null, shouldModify));
+ // Paper end - Anti-Xray
ChunkPos chunkPos = chunk.getPos();
DebugPackets.sendPoiPacketsForChunk(world, chunkPos);
}
2021-11-29 12:55:13 +01:00
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
2023-10-27 01:34:58 +02:00
index addaa87d68591dced30e304dc3880588a45234d6..4b0a7ef056ff7dd687d5135ac748ee57d556121e 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
2023-06-09 06:29:58 +02:00
@@ -175,6 +175,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
}
// Paper end
2021-11-29 12:55:13 +01:00
+ public final com.destroystokyo.paper.antixray.ChunkPacketBlockController chunkPacketBlockController; // Paper - Anti-Xray
public final co.aikar.timings.WorldTimingsHandler timings; // Paper
public static BlockPos lastPhysicsProblem; // Spigot
private org.spigotmc.TickLimiter entityLimiter;
2023-06-09 06:29:58 +02:00
@@ -193,7 +194,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
2021-11-29 12:55:13 +01:00
public abstract ResourceKey<LevelStem> getTypeKey();
2023-03-14 20:54:57 +01:00
- protected Level(WritableLevelData worlddatamutable, ResourceKey<Level> resourcekey, RegistryAccess iregistrycustom, Holder<DimensionType> holder, Supplier<ProfilerFiller> supplier, boolean flag, boolean flag1, long i, int j, org.bukkit.generator.ChunkGenerator gen, org.bukkit.generator.BiomeProvider biomeProvider, org.bukkit.World.Environment env, java.util.function.Function<org.spigotmc.SpigotWorldConfig, io.papermc.paper.configuration.WorldConfiguration> paperWorldConfigCreator) { // Paper
+ protected Level(WritableLevelData worlddatamutable, ResourceKey<Level> resourcekey, RegistryAccess iregistrycustom, Holder<DimensionType> holder, Supplier<ProfilerFiller> supplier, boolean flag, boolean flag1, long i, int j, org.bukkit.generator.ChunkGenerator gen, org.bukkit.generator.BiomeProvider biomeProvider, org.bukkit.World.Environment env, java.util.function.Function<org.spigotmc.SpigotWorldConfig, io.papermc.paper.configuration.WorldConfiguration> paperWorldConfigCreator, java.util.concurrent.Executor executor) { // Paper - Async-Anti-Xray - Pass executor
2021-11-29 12:55:13 +01:00
this.spigotConfig = new org.spigotmc.SpigotWorldConfig(((net.minecraft.world.level.storage.PrimaryLevelData) worlddatamutable).getLevelName()); // Spigot
this.paperConfig = paperWorldConfigCreator.apply(this.spigotConfig); // Paper
2021-11-29 12:55:13 +01:00
this.generator = gen;
2023-06-09 06:29:58 +02:00
@@ -279,6 +280,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
this.keepSpawnInMemory = this.paperConfig().spawn.keepSpawnLoaded; // Paper
2023-10-27 01:34:58 +02:00
this.entityLimiter = new org.spigotmc.TickLimiter(this.spigotConfig.entityMaxTickTime);
this.tileLimiter = new org.spigotmc.TickLimiter(this.spigotConfig.tileMaxTickTime);
+ this.chunkPacketBlockController = this.paperConfig().anticheat.antiXray.enabled ? new com.destroystokyo.paper.antixray.ChunkPacketBlockControllerAntiXray(this, executor) : com.destroystokyo.paper.antixray.ChunkPacketBlockController.NO_OPERATION_INSTANCE; // Paper - Anti-Xray
2021-11-29 12:55:13 +01:00
}
// Paper start
@@ -544,6 +546,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
2021-11-29 12:55:13 +01:00
// CraftBukkit end
BlockState iblockdata1 = chunk.setBlockState(pos, state, (flags & 64) != 0, (flags & 1024) == 0); // CraftBukkit custom NO_PLACE flag
+ this.chunkPacketBlockController.onBlockChange(this, pos, state, iblockdata1, flags, maxUpdateDepth); // 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 5e8d2e4245757a0889645ea79ee68afb53f7dde4..f7e5e016a7028a9196e689e950805b0d5b31fe38 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
@@ -152,17 +152,17 @@ public abstract class ChunkAccess implements BlockGetter, BiomeManager.NoiseBiom
2022-07-18 12:30:31 +02:00
}
}
2023-06-09 06:29:58 +02:00
- ChunkAccess.replaceMissingSections(biomeRegistry, this.sections);
+ this.replaceMissingSections(biomeRegistry, this.sections); // Paper - Anti-Xray - make it a non-static method
2022-07-18 12:30:31 +02:00
// CraftBukkit start
2023-06-09 06:29:58 +02:00
this.biomeRegistry = biomeRegistry;
2022-07-18 12:30:31 +02:00
}
public final Registry<Biome> biomeRegistry;
// CraftBukkit end
2023-06-09 06:29:58 +02:00
- private static void replaceMissingSections(Registry<Biome> biomeRegistry, LevelChunkSection[] sectionArray) {
+ private void replaceMissingSections(Registry<Biome> biomeRegistry, LevelChunkSection[] sectionArray) { // Paper - Anti-Xray - static -> non-static
2021-11-29 12:55:13 +01:00
for (int i = 0; i < sectionArray.length; ++i) {
if (sectionArray[i] == null) {
2023-06-09 06:29:58 +02:00
- sectionArray[i] = new LevelChunkSection(biomeRegistry);
+ sectionArray[i] = new LevelChunkSection(biomeRegistry, this.levelHeightAccessor instanceof net.minecraft.world.level.Level ? (net.minecraft.world.level.Level) this.levelHeightAccessor : null, this.chunkPos, this.levelHeightAccessor.getSectionYFromSectionIndex(i)); // Paper start - Anti-Xray - Add parameters
2021-11-29 12:55:13 +01:00
}
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
2023-10-27 01:34:58 +02:00
index d9d2bf31a0e7ad374aa62197c71626a1abfbaf71..4a5491a79281b7cddf5ad5f060567f174b89d14b 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -91,7 +91,7 @@ public class LevelChunk extends ChunkAccess {
2021-11-29 12:55:13 +01:00
}
public LevelChunk(Level world, ChunkPos pos, UpgradeData upgradeData, LevelChunkTicks<Block> blockTickScheduler, LevelChunkTicks<Fluid> fluidTickScheduler, long inhabitedTime, @Nullable LevelChunkSection[] sectionArrayInitializer, @Nullable LevelChunk.PostLoadProcessor entityLoader, @Nullable BlendingData blendingData) {
- super(pos, upgradeData, world, world.registryAccess().registryOrThrow(Registries.BIOME), inhabitedTime, sectionArrayInitializer, blendingData);
2022-12-07 20:22:28 +01:00
+ super(pos, upgradeData, world, net.minecraft.server.MinecraftServer.getServer().registryAccess().registryOrThrow(Registries.BIOME), inhabitedTime, sectionArrayInitializer, blendingData); // Paper - Anti-Xray - The world isn't ready yet, use server singleton for registry
this.tickersInLevel = Maps.newHashMap();
this.level = (ServerLevel) world; // CraftBukkit - type
this.gameEventListenerRegistrySections = new Int2ObjectOpenHashMap();
2021-11-29 12:55:13 +01:00
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
2023-06-09 06:29:58 +02:00
index 2c3ea88bac229df67bd742e16d2106d80bcc8889..4eeb719b40ff1c18a7cdda7ecc6b135dbedd626e 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
2023-06-09 06:29:58 +02:00
@@ -33,9 +33,12 @@ public class LevelChunkSection {
2021-11-29 12:55:13 +01:00
this.recalcBlockCounts();
}
2023-06-09 06:29:58 +02:00
- public LevelChunkSection(Registry<Biome> biomeRegistry) {
2021-11-29 12:55:13 +01:00
- this.states = new PalettedContainer<>(Block.BLOCK_STATE_REGISTRY, Blocks.AIR.defaultBlockState(), PalettedContainer.Strategy.SECTION_STATES);
2022-03-01 06:43:03 +01:00
- this.biomes = new PalettedContainer<>(biomeRegistry.asHolderIdMap(), biomeRegistry.getHolderOrThrow(Biomes.PLAINS), PalettedContainer.Strategy.SECTION_BIOMES);
2023-06-09 06:29:58 +02:00
+ // Paper start - Anti-Xray - Add parameters
+ @Deprecated @io.papermc.paper.annotation.DoNotUse public LevelChunkSection(Registry<Biome> biomeRegistry) { this(biomeRegistry, null, null, 0); }
+ public LevelChunkSection(Registry<Biome> biomeRegistry, net.minecraft.world.level.Level level, net.minecraft.world.level.ChunkPos chunkPos, int chunkSectionY) {
+ // Paper end
+ this.states = new PalettedContainer<>(Block.BLOCK_STATE_REGISTRY, Blocks.AIR.defaultBlockState(), PalettedContainer.Strategy.SECTION_STATES, level == null || level.chunkPacketBlockController == null ? null : level.chunkPacketBlockController.getPresetBlockStates(level, chunkPos, chunkSectionY)); // Paper - Anti-Xray - Add preset block states
2022-03-01 06:43:03 +01:00
+ this.biomes = new PalettedContainer<>(biomeRegistry.asHolderIdMap(), biomeRegistry.getHolderOrThrow(Biomes.PLAINS), PalettedContainer.Strategy.SECTION_BIOMES, null); // Paper - Anti-Xray - Add preset biomes
2021-11-29 12:55:13 +01:00
}
2023-06-09 06:29:58 +02:00
public BlockState getBlockState(int x, int y, int z) {
@@ -172,10 +175,13 @@ public class LevelChunkSection {
i really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really 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2022-06-08 05:40:53 +02:00
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2022-07-27 22:46:05 +02:00
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2021-11-29 12:55:13 +01:00
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2021-11-29 12:55:13 +01:00
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2022-03-01 06:43:03 +01:00
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2021-11-29 12:55:13 +01:00
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2021-11-29 12:55:13 +01:00
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2023-03-23 22:57:03 +01:00
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2021-11-29 12:55:13 +01:00
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2023-03-23 22:57:03 +01:00
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this.data = data;
2022-07-18 12:30:31 +02:00
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2021-11-29 12:55:13 +01:00
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2023-03-23 22:57:03 +01:00
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2022-07-18 12:30:31 +02:00
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2022-06-08 05:40:53 +02:00
// CraftBukkit end
2021-11-29 12:55:13 +01:00
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
2023-10-27 01:34:58 +02:00
index 593cfd68dc0f3679c684b6a1d2036419d4f3bc0c..b4b2f961d1e4f8b5b199052efefd96bcbfc3e68b 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
@@ -53,7 +53,7 @@ public class CraftChunk implements Chunk {
2021-11-29 12:55:13 +01:00
private final ServerLevel worldServer;
private final int x;
private final int z;
- private static final PalettedContainer<net.minecraft.world.level.block.state.BlockState> emptyBlockIDs = new PalettedContainer<>(net.minecraft.world.level.block.Block.BLOCK_STATE_REGISTRY, Blocks.AIR.defaultBlockState(), PalettedContainer.Strategy.SECTION_STATES);
+ private static final PalettedContainer<net.minecraft.world.level.block.state.BlockState> emptyBlockIDs = new PalettedContainer<>(net.minecraft.world.level.block.Block.BLOCK_STATE_REGISTRY, Blocks.AIR.defaultBlockState(), PalettedContainer.Strategy.SECTION_STATES, null); // Paper - Anti-Xray - Add preset block states
private static final byte[] FULL_LIGHT = new byte[2048];
private static final byte[] EMPTY_LIGHT = new byte[2048];
2021-11-29 12:55:13 +01:00
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
2023-10-27 01:34:58 +02:00
index 34905e673683620fc5f0158fea3c16049d09f8f2..c70c64c2ae7bed27f39db12bd2329aa600ae2fe5 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -2278,7 +2278,7 @@ public final class CraftServer implements Server {
2021-11-29 12:55:13 +01:00
public ChunkGenerator.ChunkData createChunkData(World world) {
Preconditions.checkArgument(world != null, "World cannot be null");
2021-11-29 12:55:13 +01:00
ServerLevel handle = ((CraftWorld) world).getHandle();
2022-12-07 20:22:28 +01:00
- return new OldCraftChunkData(world.getMinHeight(), world.getMaxHeight(), handle.registryAccess().registryOrThrow(Registries.BIOME));
+ return new OldCraftChunkData(world.getMinHeight(), world.getMaxHeight(), handle.registryAccess().registryOrThrow(Registries.BIOME), world); // Paper - Anti-Xray - Add parameters
2021-11-29 12:55:13 +01:00
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
2023-10-27 01:34:58 +02:00
index 27ec5d989be1288ea32fa115ce37e4d98dc54892..d352f6882adbf642b61e0f3f18abebbe5fff1a9b 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -419,11 +419,16 @@ public class CraftWorld extends CraftRegionAccessor implements World {
List<ServerPlayer> playersInRange = playerChunk.playerProvider.getPlayers(playerChunk.getPos(), false);
Rewrite chunk system (#8177) Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 10:02:51 +02:00
if (playersInRange.isEmpty()) return true; // Paper - rewrite player chunk loader
2023-06-09 06:29:58 +02:00
- ClientboundLevelChunkWithLightPacket refreshPacket = new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null);
+ // Paper start - Anti-Xray - Bypass
+ Map<Object, ClientboundLevelChunkWithLightPacket> refreshPackets = new HashMap<>();
for (ServerPlayer player : playersInRange) {
if (player.connection == null) continue;
- player.connection.send(refreshPacket);
+ Boolean shouldModify = chunk.getLevel().chunkPacketBlockController.shouldModify(player, chunk);
+ player.connection.send(refreshPackets.computeIfAbsent(shouldModify, s -> { // Use connection to prevent creating firing event
2023-06-09 06:29:58 +02:00
+ return new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null, (Boolean) s);
+ }));
+ // Paper end
}
Rewrite chunk system (#8177) Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 10:02:51 +02:00
// Paper - rewrite player chunk loader
2021-11-29 12:55:13 +01:00
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java b/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
2023-06-09 06:29:58 +02:00
index c23ce88cb9693291fec81a99e3a5bcb2615bb897..a9700b750f124b5367c91ac071ee5194e9f7f8d8 100644
2021-11-29 12:55:13 +01:00
--- a/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
@@ -27,8 +27,13 @@ public final class OldCraftChunkData implements ChunkGenerator.ChunkData {
private final Registry<net.minecraft.world.level.biome.Biome> biomes;
private Set<BlockPos> tiles;
private final Set<BlockPos> lights = new HashSet<>();
+ // Paper start - Anti-Xray - Add parameters
+ private final World world;
- public OldCraftChunkData(int minHeight, int maxHeight, Registry<net.minecraft.world.level.biome.Biome> biomes) {
2022-07-18 12:30:31 +02:00
+ @Deprecated @io.papermc.paper.annotation.DoNotUse public OldCraftChunkData(int minHeight, int maxHeight, Registry<net.minecraft.world.level.biome.Biome> biomes) { this(minHeight, maxHeight, biomes, null); }
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+ public OldCraftChunkData(int minHeight, int maxHeight, Registry<net.minecraft.world.level.biome.Biome> biomes, World world) {
+ this.world = world;
+ // Paper end
this.minHeight = minHeight;
this.maxHeight = maxHeight;
this.biomes = biomes;
@@ -176,7 +181,7 @@ public final class OldCraftChunkData implements ChunkGenerator.ChunkData {
int offset = (y - this.minHeight) >> 4;
LevelChunkSection section = this.sections[offset];
if (create && section == null) {
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- this.sections[offset] = section = new LevelChunkSection(this.biomes);
+ this.sections[offset] = section = new LevelChunkSection(this.biomes, this.world instanceof org.bukkit.craftbukkit.CraftWorld ? ((org.bukkit.craftbukkit.CraftWorld) this.world).getHandle() : null, null, offset + (this.minHeight >> 4)); // Paper - Anti-Xray - Add parameters
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}
return section;
}