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Allow enabling sand duping (#10191)

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Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable.
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Owen 2024-03-03 17:05:34 -05:00 • committed by GitHub
parent b21eb4d9a4
commit 89d51d5f29
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GPG key ID: B5690EEEBB952194
673 changed files with 157 additions and 189 deletions
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patches/server/0714-Fix-falling-block-spawn-methods.patch Normal file
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@ -0,0 +1,57 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Fri, 4 Mar 2022 20:35:19 +0100
Subject: [PATCH] Fix falling block spawn methods
Restores the API behavior from previous versions of the server
- Do not call API events
- Do not replace the existing block in the world
== AT ==
public net.minecraft.world.entity.item.FallingBlockEntity <init>(Lnet/minecraft/world/level/Level;DDDLnet/minecraft/world/level/block/state/BlockState;)V
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 7bb43181e4de4cf3a3944aea88c45e54e476433c..97ebf2e2e08469cacc66c4f38bd2edfc2107fe6a 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1394,7 +1394,12 @@ public class CraftWorld extends CraftRegionAccessor implements World {
Preconditions.checkArgument(material != null, "Material cannot be null");
Preconditions.checkArgument(material.isBlock(), "Material.%s must be a block", material);
- FallingBlockEntity entity = FallingBlockEntity.fall(this.world, BlockPos.containing(location.getX(), location.getY(), location.getZ()), CraftBlockType.bukkitToMinecraft(material).defaultBlockState(), SpawnReason.CUSTOM);
+ // Paper start - restore API behavior for spawning falling blocks
+ FallingBlockEntity entity = new FallingBlockEntity(this.world, location.getX(), location.getY(), location.getZ(), CraftBlockType.bukkitToMinecraft(material).defaultBlockState()); // Paper
+ entity.time = 1;
+
+ this.world.addFreshEntity(entity, SpawnReason.CUSTOM);
+ // Paper end - restore API behavior for spawning falling blocks
return (FallingBlock) entity.getBukkitEntity();
}
@@ -1403,7 +1408,12 @@ public class CraftWorld extends CraftRegionAccessor implements World {
Preconditions.checkArgument(location != null, "Location cannot be null");
Preconditions.checkArgument(data != null, "BlockData cannot be null");
- FallingBlockEntity entity = FallingBlockEntity.fall(this.world, BlockPos.containing(location.getX(), location.getY(), location.getZ()), ((CraftBlockData) data).getState(), SpawnReason.CUSTOM);
+ // Paper start - restore API behavior for spawning falling blocks
+ FallingBlockEntity entity = new FallingBlockEntity(this.world, location.getX(), location.getY(), location.getZ(), ((CraftBlockData) data).getState());
+ entity.time = 1;
+
+ this.world.addFreshEntity(entity, SpawnReason.CUSTOM);
+ // Paper end - restore API behavior for spawning falling blocks
return (FallingBlock) entity.getBukkitEntity();
}
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
index 0aa6cd6da72c4a48d8bb48adeccc2bb49939fabd..08316493785e0cf1f93f07dda8016ca5956216f8 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
@@ -378,7 +378,7 @@ public final class CraftEntityTypes {
register(new EntityTypeData<>(EntityType.PRIMED_TNT, TNTPrimed.class, CraftTNTPrimed::new, spawnData -> new PrimedTnt(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), null)));
register(new EntityTypeData<>(EntityType.FALLING_BLOCK, FallingBlock.class, CraftFallingBlock::new, spawnData -> {
BlockPos pos = BlockPos.containing(spawnData.x(), spawnData.y(), spawnData.z());
- return FallingBlockEntity.fall(spawnData.minecraftWorld(), pos, spawnData.world().getBlockState(pos));
+ return new FallingBlockEntity(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), spawnData.world().getBlockState(pos)); // Paper - create falling block entities correctly
}));
register(new EntityTypeData<>(EntityType.FIREWORK, Firework.class, CraftFirework::new, spawnData -> new FireworkRocketEntity(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), net.minecraft.world.item.ItemStack.EMPTY)));
register(new EntityTypeData<>(EntityType.EVOKER_FANGS, EvokerFangs.class, CraftEvokerFangs::new, spawnData -> new net.minecraft.world.entity.projectile.EvokerFangs(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), (float) Math.toRadians(spawnData.yaw()), 0, null)));