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papermc/CraftBukkit-Patches/0061-Orebfuscator.patch
Zach Brown 7b0c576798 Restructure PaperSpigot as a new set of modules 
Allows us much greater control over the Spigot portion of the code
and makes us more "proper"
Credit to @Dmck2b for originally passing the idea along a while back
2014-07-21 15:46:54 -05:00

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From 935843a587ceb77ad93fe57a272c39f2d2dc029b Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
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 5576f15..df602bd 100644
--- a/src/main/java/net/minecraft/server/EntityFallingBlock.java
+++ b/src/main/java/net/minecraft/server/EntityFallingBlock.java
@@ -83,6 +83,7 @@ public class EntityFallingBlock extends Entity {
}
this.world.setAir(i, j, k);
+ world.spigotConfig.antiXrayInstance.updateNearbyBlocks(world, i, j, k); // Spigot
}
if (this.onGround) {
@@ -98,6 +99,7 @@ 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 56fa999..4502f68 100644
--- a/src/main/java/net/minecraft/server/Explosion.java
+++ b/src/main/java/net/minecraft/server/Explosion.java
@@ -203,6 +203,7 @@ 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 613c1f1..7479600 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.f = 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 7607155..b4461b9 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 3806f7f..c7c33b0 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -237,9 +237,16 @@ public abstract class World implements IBlockAccess {
return this.getType(i, k, j);
}
- public Block getType(int i, int j, int k) {
+ // Spigot start
+ public Block getType(int i, int j, int k)
+ {
+ return getType( i, j, k, true );
+ }
+
+ public Block getType(int i, int j, int k, boolean useCaptured) {
// CraftBukkit start - tree generation
- if (captureTreeGeneration) {
+ if (captureTreeGeneration && useCaptured) {
+ // Spigot end
Iterator<BlockState> it = capturedBlockStates.iterator();
while (it.hasNext()) {
BlockState previous = it.next();
@@ -551,6 +558,7 @@ 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..fad22e2
--- /dev/null
+++ b/src/main/java/org/spigotmc/AntiXray.java
@@ -0,0 +1,227 @@
+package org.spigotmc;
+
+import net.minecraft.util.gnu.trove.set.TByteSet;
+import net.minecraft.util.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.getById( 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.getId( 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, false)) /* 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<Integer> hiddenBlocks;
+ public List<Integer> 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 );
+ }
}
--
1.9.1
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