From ef9e06887f0d3836c29e13ae7927b23b9ad36bf1 Mon Sep 17 00:00:00 2001 From: md_5 Date: Thu, 16 May 2013 18:51:05 +1000 Subject: [PATCH] Orebfuscator diff --git a/src/main/java/net/minecraft/server/EntityFallingBlock.java b/src/main/java/net/minecraft/server/EntityFallingBlock.java index bc51217..8335e89 100644 --- a/src/main/java/net/minecraft/server/EntityFallingBlock.java +++ b/src/main/java/net/minecraft/server/EntityFallingBlock.java @@ -86,6 +86,7 @@ public class EntityFallingBlock extends Entity { } this.world.setAir(i, j, k); + world.spigotConfig.antiXrayInstance.updateNearbyBlocks(world, i, j, k); // Spigot } if (this.onGround) { @@ -101,6 +102,7 @@ public class EntityFallingBlock extends Entity { } this.world.setTypeAndData(i, j, k, this.id, this.data, 3); // CraftBukkit end + world.spigotConfig.antiXrayInstance.updateNearbyBlocks(world, i, j, k); // Spigot if (this.id instanceof BlockFalling) { ((BlockFalling) this.id).a(this.world, i, j, k, this.data); diff --git a/src/main/java/net/minecraft/server/Explosion.java b/src/main/java/net/minecraft/server/Explosion.java index d6ac728..229b296 100644 --- a/src/main/java/net/minecraft/server/Explosion.java +++ b/src/main/java/net/minecraft/server/Explosion.java @@ -239,6 +239,7 @@ public class Explosion { j = chunkposition.y; k = chunkposition.z; block = this.world.getType(i, j, k); + world.spigotConfig.antiXrayInstance.updateNearbyBlocks(world, i, j, k); // Spigot if (flag) { double d0 = (double) ((float) i + this.world.random.nextFloat()); double d1 = (double) ((float) j + this.world.random.nextFloat()); diff --git a/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java b/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java index 09b34e9..3006712 100644 --- a/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java +++ b/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java @@ -28,6 +28,7 @@ public class PacketPlayOutMapChunk extends Packet { this.d = chunkmap.c; this.c = chunkmap.b; + chunk.world.spigotConfig.antiXrayInstance.obfuscateSync(chunk.locX, chunk.locZ, i, chunkmap.a, chunk.world); // Spigot try { this.buffer = chunkmap.a; diff --git a/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java b/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java index bf3a139..30bf8a7 100644 --- a/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java +++ b/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java @@ -26,6 +26,7 @@ public class PacketPlayOutMapChunkBulk extends Packet { } }; // CraftBukkit end + private World world; // Spigot public PacketPlayOutMapChunkBulk() {} @@ -44,6 +45,9 @@ public class PacketPlayOutMapChunkBulk extends Packet { Chunk chunk = (Chunk) list.get(k); ChunkMap chunkmap = PacketPlayOutMapChunk.a(chunk, true, '\uffff'); + // Spigot start + world = chunk.world; + /* if (buildBuffer.length < j + chunkmap.a.length) { byte[] abyte = new byte[j + chunkmap.a.length]; @@ -52,6 +56,8 @@ public class PacketPlayOutMapChunkBulk extends Packet { } System.arraycopy(chunkmap.a, 0, buildBuffer, j, chunkmap.a.length); + */ + // Spigot end j += chunkmap.a.length; this.a[k] = chunk.locX; this.b[k] = chunk.locZ; @@ -79,6 +85,22 @@ public class PacketPlayOutMapChunkBulk extends Packet { if (this.buffer != null) { return; } + // Spigot start + int finalBufferSize = 0; + // Obfuscate all sections + for (int i = 0; i < a.length; i++) { + world.spigotConfig.antiXrayInstance.obfuscate(a[i], b[i], c[i], inflatedBuffers[i], world); + finalBufferSize += inflatedBuffers[i].length; + } + + // Now it's time to efficiently copy the chunk to the build buffer + buildBuffer = new byte[finalBufferSize]; + int bufferLocation = 0; + for (int i = 0; i < a.length; i++) { + System.arraycopy(inflatedBuffers[i], 0, buildBuffer, bufferLocation, inflatedBuffers[i].length); + bufferLocation += inflatedBuffers[i].length; + } + // Spigot end Deflater deflater = localDeflater.get(); deflater.reset(); diff --git a/src/main/java/net/minecraft/server/PlayerInteractManager.java b/src/main/java/net/minecraft/server/PlayerInteractManager.java index 2db45ad..97fe53c 100644 --- a/src/main/java/net/minecraft/server/PlayerInteractManager.java +++ b/src/main/java/net/minecraft/server/PlayerInteractManager.java @@ -173,6 +173,7 @@ public class PlayerInteractManager { this.o = i1; } } + world.spigotConfig.antiXrayInstance.updateNearbyBlocks(world, i, j, k); // Spigot } } diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java index 6da7de6..2de7e62 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -548,6 +548,7 @@ public abstract class World implements IBlockAccess { this.e(i, j + 1, k, block); this.e(i, j, k - 1, block); this.e(i, j, k + 1, block); + spigotConfig.antiXrayInstance.updateNearbyBlocks(this, i, j, k); // Spigot } public void b(int i, int j, int k, Block block, int l) { diff --git a/src/main/java/org/spigotmc/AntiXray.java b/src/main/java/org/spigotmc/AntiXray.java new file mode 100644 index 0000000..20ae98e --- /dev/null +++ b/src/main/java/org/spigotmc/AntiXray.java @@ -0,0 +1,227 @@ +package org.spigotmc; + +import gnu.trove.set.TByteSet; +import gnu.trove.set.hash.TByteHashSet; +import net.minecraft.server.Block; +import net.minecraft.server.Blocks; +import net.minecraft.server.World; +import org.bukkit.craftbukkit.util.CraftMagicNumbers; + +public class AntiXray +{ + + private static final CustomTimingsHandler update = new CustomTimingsHandler( "xray - update" ); + private static final CustomTimingsHandler obfuscate = new CustomTimingsHandler( "xray - obfuscate" ); + /*========================================================================*/ + // Used to keep track of which blocks to obfuscate + private final boolean[] obfuscateBlocks = new boolean[ Short.MAX_VALUE ]; + // Used to select a random replacement ore + private final byte[] replacementOres; + + public AntiXray(SpigotWorldConfig config) + { + // Set all listed blocks as true to be obfuscated + for ( int id : ( config.engineMode == 1 ) ? config.hiddenBlocks : config.replaceBlocks ) + { + obfuscateBlocks[id] = true; + } + + // For every block + TByteSet blocks = new TByteHashSet(); + for ( Integer i : config.hiddenBlocks ) + { + Block block = Block.e( i ); + // Check it exists and is not a tile entity + if ( block != null && !block.isTileEntity() ) + { + // Add it to the set of replacement blocks + blocks.add( (byte) (int) i ); + } + } + // Bake it to a flat array of replacements + replacementOres = blocks.toArray(); + } + + /** + * Starts the timings handler, then updates all blocks within the set radius + * of the given coordinate, revealing them if they are hidden ores. + */ + public void updateNearbyBlocks(World world, int x, int y, int z) + { + if ( world.spigotConfig.antiXray ) + { + update.startTiming(); + updateNearbyBlocks( world, x, y, z, 2, false ); // 2 is the radius, we shouldn't change it as that would make it exponentially slower + update.stopTiming(); + } + } + + /** + * Starts the timings handler, and then removes all non exposed ores from + * the chunk buffer. + */ + public void obfuscateSync(int chunkX, int chunkY, int bitmask, byte[] buffer, World world) + { + if ( world.spigotConfig.antiXray ) + { + obfuscate.startTiming(); + obfuscate( chunkX, chunkY, bitmask, buffer, world ); + obfuscate.stopTiming(); + } + } + + /** + * Removes all non exposed ores from the chunk buffer. + */ + public void obfuscate(int chunkX, int chunkY, int bitmask, byte[] buffer, World world) + { + // If the world is marked as obfuscated + if ( world.spigotConfig.antiXray ) + { + // Initial radius to search around for air + int initialRadius = 1; + // Which block in the buffer we are looking at, anywhere from 0 to 16^4 + int index = 0; + // The iterator marking which random ore we should use next + int randomOre = 0; + + // Chunk corner X and Z blocks + int startX = chunkX << 4; + int startZ = chunkY << 4; + + byte replaceWithTypeId; + switch ( world.getWorld().getEnvironment() ) + { + case NETHER: + replaceWithTypeId = (byte) CraftMagicNumbers.getId(Blocks.NETHERRACK); + break; + case THE_END: + replaceWithTypeId = (byte) CraftMagicNumbers.getId(Blocks.WHITESTONE); + break; + default: + replaceWithTypeId = (byte) CraftMagicNumbers.getId(Blocks.STONE); + break; + } + + // Chunks can have up to 16 sections + for ( int i = 0; i < 16; i++ ) + { + // If the bitmask indicates this chunk is sent... + if ( ( bitmask & 1 << i ) != 0 ) + { + // Work through all blocks in the chunk, y,z,x + for ( int y = 0; y < 16; y++ ) + { + for ( int z = 0; z < 16; z++ ) + { + for ( int x = 0; x < 16; x++ ) + { + // For some reason we can get too far ahead of ourselves (concurrent modification on bulk chunks?) so if we do, just abort and move on + if ( index >= buffer.length ) + { + index++; + continue; + } + // Grab the block ID in the buffer. + // TODO: extended IDs are not yet supported + int blockId = buffer[index] & 0xFF; + // Check if the block should be obfuscated + if ( obfuscateBlocks[blockId] ) + { + // The world isn't loaded, bail out + if ( !isLoaded( world, startX + x, ( i << 4 ) + y, startZ + z, initialRadius ) ) + { + index++; + continue; + } + // On the otherhand, if radius is 0, or the nearby blocks are all non air, we can obfuscate + if ( !hasTransparentBlockAdjacent( world, startX + x, ( i << 4 ) + y, startZ + z, initialRadius ) ) + { + switch ( world.spigotConfig.engineMode ) + { + case 1: + // Replace with replacement material + buffer[index] = replaceWithTypeId; + break; + case 2: + // Replace with random ore. + if ( randomOre >= replacementOres.length ) + { + randomOre = 0; + } + buffer[index] = replacementOres[randomOre++]; + break; + } + } + } + + index++; + } + } + } + } + } + } + } + + private void updateNearbyBlocks(World world, int x, int y, int z, int radius, boolean updateSelf) + { + // If the block in question is loaded + if ( world.isLoaded( x, y, z ) ) + { + // Get block id + Block block = world.getType(x, y, z); + + // See if it needs update + if ( updateSelf && obfuscateBlocks[Block.b(block)] ) + { + // Send the update + world.notify( x, y, z ); + } + + // Check other blocks for updates + if ( radius > 0 ) + { + updateNearbyBlocks( world, x + 1, y, z, radius - 1, true ); + updateNearbyBlocks( world, x - 1, y, z, radius - 1, true ); + updateNearbyBlocks( world, x, y + 1, z, radius - 1, true ); + updateNearbyBlocks( world, x, y - 1, z, radius - 1, true ); + updateNearbyBlocks( world, x, y, z + 1, radius - 1, true ); + updateNearbyBlocks( world, x, y, z - 1, radius - 1, true ); + } + } + } + + private static boolean isLoaded(World world, int x, int y, int z, int radius) + { + return world.isLoaded( x, y, z ) + && ( radius == 0 || + ( isLoaded( world, x + 1, y, z, radius - 1 ) + && isLoaded( world, x - 1, y, z, radius - 1 ) + && isLoaded( world, x, y + 1, z, radius - 1 ) + && isLoaded( world, x, y - 1, z, radius - 1 ) + && isLoaded( world, x, y, z + 1, radius - 1 ) + && isLoaded( world, x, y, z - 1, radius - 1 ) ) ); + } + + private static boolean hasTransparentBlockAdjacent(World world, int x, int y, int z, int radius) + { + return !isSolidBlock(world.getType(x, y, z)) /* isSolidBlock */ + || ( radius > 0 + && ( hasTransparentBlockAdjacent( world, x + 1, y, z, radius - 1 ) + || hasTransparentBlockAdjacent( world, x - 1, y, z, radius - 1 ) + || hasTransparentBlockAdjacent( world, x, y + 1, z, radius - 1 ) + || hasTransparentBlockAdjacent( world, x, y - 1, z, radius - 1 ) + || hasTransparentBlockAdjacent( world, x, y, z + 1, radius - 1 ) + || hasTransparentBlockAdjacent( world, x, y, z - 1, radius - 1 ) ) ); + } + + private static boolean isSolidBlock(Block block) { + // Mob spawners are treated as solid blocks as far as the + // game is concerned for lighting and other tasks but for + // rendering they can be seen through therefor we special + // case them so that the antixray doesn't show the fake + // blocks around them. + return block.r() && block != Blocks.MOB_SPAWNER; + } +} diff --git a/src/main/java/org/spigotmc/SpigotWorldConfig.java b/src/main/java/org/spigotmc/SpigotWorldConfig.java index 1814b4f..45b2aae 100644 --- a/src/main/java/org/spigotmc/SpigotWorldConfig.java +++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java @@ -1,5 +1,6 @@ package org.spigotmc; +import java.util.Arrays; import java.util.List; import org.bukkit.Bukkit; import org.bukkit.configuration.file.YamlConfiguration; @@ -212,4 +213,36 @@ public class SpigotWorldConfig arrowDespawnRate = getInt( "arrow-despawn-rate", 1200 ); log( "Arrow Despawn Rate: " + arrowDespawnRate ); } + + public boolean antiXray; + public int engineMode; + public List hiddenBlocks; + public List replaceBlocks; + public AntiXray antiXrayInstance; + private void antiXray() + { + antiXray = getBoolean( "anti-xray.enabled", true ); + log( "Anti X-Ray: " + antiXray ); + + engineMode = getInt( "anti-xray.engine-mode", 1 ); + log( "\tEngine Mode: " + engineMode ); + + if ( SpigotConfig.version < 5 ) + { + set( "anti-xray.blocks", null ); + } + hiddenBlocks = getList( "anti-xray.hide-blocks", Arrays.asList( new Integer[] + { + 14, 15, 16, 21, 48, 49, 54, 56, 73, 74, 82, 129, 130 + } ) ); + log( "\tHidden Blocks: " + hiddenBlocks ); + + replaceBlocks = getList( "anti-xray.replace-blocks", Arrays.asList( new Integer[] + { + 1, 5 + } ) ); + log( "\tReplace Blocks: " + replaceBlocks ); + + antiXrayInstance = new AntiXray( this ); + } } -- 1.8.3.2