papermc/patches/server/0353-Anti-Xray.patch

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2021-11-29 11:55:13 +00:00
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
index 0000000000000000000000000000000000000000..aabad39d13ead83042ec2e4dd7f4ed4966af650d
--- /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() {
+
+ }
+
+ public BlockState[] getPresetBlockStates(Level level, ChunkPos chunkPos, int bottomBlockY) {
+ 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) {
+
+ }
+
+ public void onPlayerLeftClickBlock(ServerPlayerGameMode serverPlayerGameMode, BlockPos blockPos, ServerboundPlayerActionPacket.Action action, Direction direction, int worldHeight) {
+
+ }
+}
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..a5d43901595f864c8a5dd5d013aa42d7f294e489
2021-11-29 11:55:13 +00:00
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java
@@ -0,0 +1,692 @@
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+package com.destroystokyo.paper.antixray;
+
+import io.papermc.paper.configuration.WorldConfiguration;
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+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.core.Registry;
+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 org.spongepowered.configurate.serialize.ScalarSerializer;
+import org.spongepowered.configurate.serialize.SerializationException;
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+
+import java.lang.reflect.Type;
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+import java.util.*;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.function.IntSupplier;
+import java.util.function.Predicate;
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+
+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;
+ 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) {
+ Block block = Registry.BLOCK.getOptional(new ResourceLocation(id)).orElse(null);
+
+ 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) {
+ 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 blockState : block.getStateDefinition().getPossibleStates()) {
+ obfuscateGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(blockState)] = true;
+ }
+ }
+ }
+
+ EmptyLevelChunk emptyChunk = new EmptyLevelChunk(level, new ChunkPos(0, 0), MinecraftServer.getServer().registryAccess().registryOrThrow(Registry.BIOME_REGISTRY).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)
+ && blockState.getBlock() != Blocks.SPAWNER && blockState.getBlock() != Blocks.BARRIER && blockState.getBlock() != Blocks.SHULKER_BOX && blockState.getBlock() != Blocks.SLIME_BLOCK || paperWorldConfig.lavaObscures && blockState == Blocks.LAVA.defaultBlockState();
+ // 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
+ public BlockState[] getPresetBlockStates(Level level, ChunkPos chunkPos, int bottomBlockY) {
+ // Return the block states to be added to the paletted containers so that they can be used for obfuscation
+ 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.
+ 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.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;
+ 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;
+ 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;
+ 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
+ public void onPlayerLeftClickBlock(ServerPlayerGameMode serverPlayerGameMode, BlockPos blockPos, ServerboundPlayerActionPacket.Action action, Direction direction, int worldHeight) {
+ 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 11:55:13 +00:00
+
+ if (blockState != null && obfuscateGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(blockState)]) {
+ ((ServerLevel) level).getChunkSource().blockChanged(blockPos);
+ }
+ }
+
+ public enum EngineMode {
+
+ HIDE(1, "hide ores"),
+ OBFUSCATE(2, "obfuscate");
+
+ public static final ScalarSerializer<EngineMode> SERIALIZER = new Serializer();
+
2021-11-29 11:55:13 +00:00
+ 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;
+ }
+
+ static class Serializer extends ScalarSerializer<EngineMode> {
+
+ Serializer() {
+ super(EngineMode.class);
+ }
+
+ @Override
+ public EngineMode deserialize(Type type, Object obj) throws SerializationException {
+ if (obj instanceof Integer num) {
+ return Objects.requireNonNullElse(EngineMode.getById(num), HIDE);
+ }
+ throw new SerializationException(obj + " is not of a valid type (" + type + ") for this node");
+ }
+
+ @Override
+ protected Object serialize(EngineMode item, Predicate<Class<?>> typeSupported) {
+ return item.getId();
+ }
+ }
2021-11-29 11:55:13 +00:00
+ }
+}
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);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/configuration/PaperConfigurations.java b/src/main/java/io/papermc/paper/configuration/PaperConfigurations.java
index ef407d6a961c327631656cfd4cc610a22a9e53ac..0f185ff1af93d40519e8f093b1e63b530656d616 100644
--- a/src/main/java/io/papermc/paper/configuration/PaperConfigurations.java
+++ b/src/main/java/io/papermc/paper/configuration/PaperConfigurations.java
@@ -2,6 +2,7 @@ package io.papermc.paper.configuration;
import com.destroystokyo.paper.Metrics;
import com.destroystokyo.paper.PaperCommand;
+import com.destroystokyo.paper.antixray.ChunkPacketBlockControllerAntiXray;
import com.google.common.collect.Table;
import com.mojang.logging.LogUtils;
import io.leangen.geantyref.TypeToken;
@@ -171,6 +172,7 @@ public class PaperConfigurations extends Configurations<GlobalConfiguration, Wor
.register(DoubleOrDefault.SERIALIZER)
.register(BooleanOrDefault.SERIALIZER)
.register(Duration.SERIALIZER)
+ .register(ChunkPacketBlockControllerAntiXray.EngineMode.SERIALIZER)
.register(FallbackValueSerializer.create(spigotConfig, MinecraftServer::getServer))
.register(new RegistryValueSerializer<>(new TypeToken<EntityType<?>>() {}, Registry.ENTITY_TYPE, true))
.register(new RegistryValueSerializer<>(Item.class, Registry.ITEM, true))
2021-11-29 11:55:13 +00:00
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
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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 really 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2022-06-08 03:40:53 +00:00
index 7cf356a700e47686e093e2f2f880af919dc0414a..e902b437ee089907b34ae30c0a6bdf1d42e1e674 100644
2021-11-29 11:55:13 +00:00
--- 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
+ @Deprecated public ClientboundLevelChunkPacketData(LevelChunk chunk) { this(chunk, null); } // Notice for updates: Please make sure this constructor isn't used anywhere
+ 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 19:54:25 +00:00
for(Map.Entry<Heightmap.Types, Heightmap> entry : chunk.getHeightmaps()) {
2021-11-29 11:55:13 +00:00
@@ -43,7 +46,13 @@ public class ClientboundLevelChunkPacketData {
}
this.buffer = new byte[calculateChunkSize(chunk)];
- extractChunkData(new FriendlyByteBuf(this.getWriteBuffer()), chunk);
+ // 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
@@ -103,9 +112,12 @@ public class ClientboundLevelChunkPacketData {
return byteBuf;
}
- public static void extractChunkData(FriendlyByteBuf buf, LevelChunk chunk) {
+ // Paper start - Anti-Xray - Add chunk packet info
+ @Deprecated public static void extractChunkData(FriendlyByteBuf buf, LevelChunk chunk) { ClientboundLevelChunkPacketData.extractChunkData(buf, chunk, null); } // Notice for updates: Please make sure this function isn't used anywhere
+ public static void extractChunkData(FriendlyByteBuf buf, LevelChunk chunk, com.destroystokyo.paper.antixray.ChunkPacketInfo<net.minecraft.world.level.block.state.BlockState> chunkPacketInfo) {
for(LevelChunkSection levelChunkSection : chunk.getSections()) {
- levelChunkSection.write(buf);
+ levelChunkSection.write(buf, chunkPacketInfo);
+ // 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 7825d6f0fdcfda6212cff8033ec55fb7db236154..2072aa8710f6e285f7c8f76c63b7bcf85cc11030 100644
--- 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;
- public ClientboundLevelChunkWithLightPacket(LevelChunk chunk, LevelLightEngine lightProvider, @Nullable BitSet skyBits, @Nullable BitSet blockBits, boolean nonEdge) {
+ @Override
+ public boolean isReady() {
+ return this.ready;
+ }
+
+ public void setReady(boolean ready) {
+ this.ready = ready;
+ }
+ // Paper end
+
+ // Paper start - Anti-Xray - Add chunk packet info
+ @Deprecated public ClientboundLevelChunkWithLightPacket(LevelChunk chunk, LevelLightEngine lightProvider, @Nullable BitSet skyBits, @Nullable BitSet blockBits, boolean nonEdge) { this(chunk, lightProvider, skyBits, blockBits, nonEdge, true); } // Notice for updates: Please make sure this constructor isn't used anywhere
+ public ClientboundLevelChunkWithLightPacket(LevelChunk chunk, LevelLightEngine lightProvider, @Nullable BitSet skyBits, @Nullable BitSet blockBits, boolean nonEdge, boolean modifyBlocks) {
+ com.destroystokyo.paper.antixray.ChunkPacketInfo<net.minecraft.world.level.block.state.BlockState> chunkPacketInfo = modifyBlocks ? chunk.getLevel().chunkPacketBlockController.getChunkPacketInfo(this, chunk) : null;
ChunkPos chunkPos = chunk.getPos();
this.x = chunkPos.x;
this.z = chunkPos.z;
- this.chunkData = new ClientboundLevelChunkPacketData(chunk);
+ this.chunkData = new ClientboundLevelChunkPacketData(chunk, chunkPacketInfo);
+ // Paper end
this.lightData = new ClientboundLightUpdatePacketData(chunkPos, lightProvider, skyBits, blockBits, nonEdge);
+ chunk.getLevel().chunkPacketBlockController.modifyBlocks(this, chunkPacketInfo); // Paper - Anti-Xray - Modify blocks
}
public ClientboundLevelChunkWithLightPacket(FriendlyByteBuf buf) {
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index c4af6e0f38ac9271247ed657b8ee6b48822417b5..7996247c00bf6ea4399322d089821432333ca6c4 100644
2021-11-29 11:55:13 +00:00
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -991,7 +991,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
2021-11-29 11:55:13 +00:00
completablefuture1.thenAcceptAsync((either) -> {
either.ifLeft((chunk) -> {
this.tickingGenerated.getAndIncrement();
- MutableObject<ClientboundLevelChunkWithLightPacket> mutableobject = new MutableObject();
+ MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> mutableobject = new MutableObject<>(); // Paper - Anti-Xray - Bypass
this.getPlayers(chunkcoordintpair, false).forEach((entityplayer) -> {
this.playerLoadedChunk(entityplayer, mutableobject, chunk);
@@ -1170,7 +1170,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
2021-11-29 11:55:13 +00:00
while (objectiterator.hasNext()) {
ChunkHolder playerchunk = (ChunkHolder) objectiterator.next();
ChunkPos chunkcoordintpair = playerchunk.getPos();
- MutableObject<ClientboundLevelChunkWithLightPacket> mutableobject = new MutableObject();
+ MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> mutableobject = new MutableObject<>(); // Paper - Anti-Xray - Bypass
this.getPlayers(chunkcoordintpair, false).forEach((entityplayer) -> {
2021-12-10 14:24:07 +00:00
SectionPos sectionposition = entityplayer.getLastSectionPos();
@@ -1184,7 +1184,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
2021-11-29 11:55:13 +00:00
}
2022-01-26 03:43:53 +00:00
- protected void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<ClientboundLevelChunkWithLightPacket> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) {
+ protected void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) { // Paper - Anti-Xray - Bypass
2021-11-29 11:55:13 +00:00
if (player.level == this.level) {
if (newWithinViewDistance && !oldWithinViewDistance) {
ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos.toLong());
@@ -1721,12 +1721,17 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
2021-11-29 11:55:13 +00:00
}
- private void playerLoadedChunk(ServerPlayer player, MutableObject<ClientboundLevelChunkWithLightPacket> cachedDataPacket, LevelChunk chunk) {
- if (cachedDataPacket.getValue() == null) {
- cachedDataPacket.setValue(new ClientboundLevelChunkWithLightPacket(chunk, this.lightEngine, (BitSet) null, (BitSet) null, true));
+ // Paper start - Anti-Xray - Bypass
+ private void playerLoadedChunk(ServerPlayer player, MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> cachedDataPackets, LevelChunk chunk) {
+ if (cachedDataPackets.getValue() == null) {
+ cachedDataPackets.setValue(new java.util.HashMap<>());
}
- player.trackChunk(chunk.getPos(), (Packet) cachedDataPacket.getValue());
+ Boolean shouldModify = chunk.getLevel().chunkPacketBlockController.shouldModify(player, chunk);
+ player.trackChunk(chunk.getPos(), cachedDataPackets.getValue().computeIfAbsent(shouldModify, (s) -> {
+ return new ClientboundLevelChunkWithLightPacket(chunk, this.lightEngine, (BitSet) null, (BitSet) null, true, (Boolean) s);
+ }));
+ // Paper end
DebugPackets.sendPoiPacketsForChunk(this.level, chunk.getPos());
List<Entity> list = Lists.newArrayList();
List<Entity> list1 = Lists.newArrayList();
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 25df2a2a14aeae69b0156d041159c75f3e8e6eb7..7e08260e9cdb88ff122eaf9b494f908296d99fbb 100644
2021-11-29 11:55:13 +00:00
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
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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@@ -392,7 +392,7 @@ public class CraftChunk implements Chunk {
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empty[i] = true;
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if (biome != null) {
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- biome[i] = new PalettedContainer<>(iregistry.asHolderIdMap(), iregistry.getHolderOrThrow(Biomes.PLAINS), PalettedContainer.Strategy.SECTION_BIOMES);
+ biome[i] = new PalettedContainer<>(iregistry.asHolderIdMap(), iregistry.getHolderOrThrow(Biomes.PLAINS), PalettedContainer.Strategy.SECTION_BIOMES, null); // Paper - Anti-Xray - Add preset biomes
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}
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 4c8ca8625860c7a19c73da633b236e2b255bd6de..cf7b6b0c4b682baefcb080b4a971c388667533e5 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -2204,7 +2204,7 @@ public final class CraftServer implements Server {
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public ChunkGenerator.ChunkData createChunkData(World world) {
Validate.notNull(world, "World cannot be null");
ServerLevel handle = ((CraftWorld) world).getHandle();
- return new OldCraftChunkData(world.getMinHeight(), world.getMaxHeight(), handle.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY));
+ return new OldCraftChunkData(world.getMinHeight(), world.getMaxHeight(), handle.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), world); // Paper - Anti-Xray - Add parameters
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 65edea6420256384a108663761ac9619ba110a8e..759370eff9dd53f41d7b00b8372154acf43908e6 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -401,11 +401,16 @@ public class CraftWorld extends CraftRegionAccessor implements World {
List<ServerPlayer> playersInRange = playerChunk.playerProvider.getPlayers(playerChunk.getPos(), false);
if (playersInRange.isEmpty()) return;
- ClientboundLevelChunkWithLightPacket refreshPacket = new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null, true);
+ // 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
+ return new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null, true, (Boolean) s);
+ }));
+ // Paper end
}
});
});
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diff --git a/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java b/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
index 960405935e395a31c0300773c41413801cf0d290..6f6bf950cd15b34031618782c82824cf0b191ff8 100644
--- 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) {
+ @Deprecated public OldCraftChunkData(int minHeight, int maxHeight, Registry<net.minecraft.world.level.biome.Biome> biomes) { this(minHeight, maxHeight, biomes, null); } // Notice for updates: Please make sure this constructor isn't used anywhere
+ 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) {
- this.sections[offset] = section = new LevelChunkSection(offset + (this.minHeight >> 4), this.biomes);
+ this.sections[offset] = section = new LevelChunkSection(offset + (this.minHeight >> 4), this.biomes, null, this.world instanceof org.bukkit.craftbukkit.CraftWorld ? ((org.bukkit.craftbukkit.CraftWorld) this.world).getHandle() : null); // Paper - Anti-Xray - Add parameters
}
return section;
}