From 701fc14fd49aa989ecfdfb3986155036d594844b 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 daa376c..79c94dc 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) { diff --git a/src/main/java/net/minecraft/server/Explosion.java b/src/main/java/net/minecraft/server/Explosion.java index 758d447..1d1c88c 100644 --- a/src/main/java/net/minecraft/server/Explosion.java +++ b/src/main/java/net/minecraft/server/Explosion.java @@ -240,6 +240,7 @@ public class Explosion { j = chunkposition.y; k = chunkposition.z; l = this.world.getTypeId(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/Packet51MapChunk.java b/src/main/java/net/minecraft/server/Packet51MapChunk.java index d11c0ea..efe102e 100644 --- a/src/main/java/net/minecraft/server/Packet51MapChunk.java +++ b/src/main/java/net/minecraft/server/Packet51MapChunk.java @@ -46,6 +46,7 @@ public class Packet51MapChunk extends Packet { this.d = chunkmap.c; this.c = chunkmap.b; + chunk.world.spigotConfig.antiXrayInstance.obfuscateSync(chunk.x, chunk.z, i, chunkmap.a, chunk.world); // Spigot try { this.inflatedBuffer = chunkmap.a; diff --git a/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java b/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java index 04c44fc..a6e3be2 100644 --- a/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java +++ b/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java @@ -28,6 +28,7 @@ public class Packet56MapChunkBulk extends Packet { } }; // CraftBukkit end + private World world; // Spigot public Packet56MapChunkBulk() {} @@ -46,6 +47,9 @@ public class Packet56MapChunkBulk extends Packet { Chunk chunk = (Chunk) list.get(k); ChunkMap chunkmap = Packet51MapChunk.a(chunk, true, '\uffff'); + // Spigot start + world = chunk.world; + /* if (buildBuffer.length < j + chunkmap.a.length) { byte[] abyte = new byte[j + chunkmap.a.length]; @@ -54,6 +58,8 @@ public class Packet56MapChunkBulk extends Packet { } System.arraycopy(chunkmap.a, 0, buildBuffer, j, chunkmap.a.length); + */ + // Spigot end j += chunkmap.a.length; this.c[k] = chunk.x; this.d[k] = chunk.z; @@ -81,6 +87,22 @@ public class Packet56MapChunkBulk 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(c[i], d[i], a[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 d77a4cc..4aa9ab7 100644 --- a/src/main/java/net/minecraft/server/PlayerInteractManager.java +++ b/src/main/java/net/minecraft/server/PlayerInteractManager.java @@ -184,6 +184,7 @@ public class PlayerInteractManager { this.o = j1; } } + world.spigotConfig.antiXrayInstance.updateNearbyBlocks(world, i, j, k); // Spigot } } diff --git a/src/main/java/org/spigotmc/AntiXray.java b/src/main/java/org/spigotmc/AntiXray.java new file mode 100644 index 0000000..c29b789 --- /dev/null +++ b/src/main/java/org/spigotmc/AntiXray.java @@ -0,0 +1,203 @@ +package org.spigotmc; + +import gnu.trove.set.TByteSet; +import gnu.trove.set.hash.TByteHashSet; +import net.minecraft.server.Block; +import net.minecraft.server.World; + +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 byte[] replacementOres; + + public AntiXray(SpigotWorldConfig config) + { + // Set all listed blocks as true to be obfuscated + for ( int id : config.blocks ) + { + obfuscateBlocks[id] = true; + } + + // For every block + TByteSet blocks = new TByteHashSet(); + for ( int i = 0; i < obfuscateBlocks.length; i++ ) + { + // If we are obfuscating it + if ( obfuscateBlocks[i] ) + { + Block block = Block.byId[i]; + // Check it exists and is not a tile entity + if ( block != null && !block.t() /* isTileEntity */ ) + { + // Add it to the set of replacement blocks + blocks.add( (byte) 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 ); // 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; + + // 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++ ) + { + // 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] ) + { + // TODO: Don't really understand this, but if radius is not 0 and the world isn't loaded, bail out + if ( initialRadius != 0 && !isLoaded( world, startX + x, ( i << 4 ) + y, startZ + z, initialRadius ) ) + { + continue; + } + // On the otherhand, if radius is 0, or the nearby blocks are all non air, we can obfuscate + if ( initialRadius == 0 || !hasTransparentBlockAdjacent( world, startX + x, ( i << 4 ) + y, startZ + z, initialRadius ) ) + { + switch ( world.spigotConfig.engineMode ) + { + case 1: + // Replace with stone + buffer[index] = (byte) Block.STONE.id; + break; + case 2: + // Replace with random ore. + if ( randomOre >= replacementOres.length ) + { + randomOre = 0; + } + buffer[index] = replacementOres[randomOre++]; + break; + } + } + } + + // 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 ) + { + return; + } + } + } + } + } + } + } + } + + private void updateNearbyBlocks(World world, int x, int y, int z, int radius) + { + // If the block in question is loaded + if ( world.isLoaded( x, y, z ) ) + { + // Get block id + int id = world.getTypeId( x, y, z ); + + // See if it needs update + if ( obfuscateBlocks[id] ) + { + // Send the update + world.notify( x, y, z ); + } + + // Check other blocks for updates + if ( radius > 0 ) + { + updateNearbyBlocks( world, x + 1, y, z, radius - 1 ); + updateNearbyBlocks( world, x - 1, y, z, radius - 1 ); + updateNearbyBlocks( world, x, y + 1, z, radius - 1 ); + updateNearbyBlocks( world, x, y - 1, z, radius - 1 ); + updateNearbyBlocks( world, x, y, z + 1, radius - 1 ); + updateNearbyBlocks( world, x, y, z - 1, radius - 1 ); + } + } + } + + 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 !Block.l( world.getTypeId( 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 ) ) ); + } +} diff --git a/src/main/java/org/spigotmc/SpigotWorldConfig.java b/src/main/java/org/spigotmc/SpigotWorldConfig.java index c2da03b..a788d8d 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; @@ -123,4 +124,25 @@ public class SpigotWorldConfig viewDistance = getInt( "view-distance", Bukkit.getViewDistance() ); log( "View Distance: " + viewDistance ); } + + public boolean antiXray = true; + public int engineMode = 1; + public List blocks = Arrays.asList( new Integer[] + { + 1, 5, 14, 15, 16, 21, 48, 49, 54, 56, 73, 74, 82, 129, 130 + } ); + public AntiXray antiXrayInstance; + private void antiXray() + { + antiXray = getBoolean( "anti-xray.enabled", antiXray ); + log( "Anti X-Ray: " + antiXray ); + + engineMode = getInt( "anti-xray.engine-mode", engineMode ); + log( "\tEngine Mode: " + engineMode ); + + blocks = getList( "anti-xray.blocks", blocks ); + log( "\tBlocks: " + blocks ); + + antiXrayInstance = new AntiXray( this ); + } } -- 1.8.1.2