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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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62
patches/server/0694-Multi-Block-Change-API-Implementation.patch Normal file
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@ -0,0 +1,62 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Brody Beckwith <brody@beckwith.dev>
Date: Fri, 14 Jan 2022 00:41:11 -0500
Subject: [PATCH] Multi Block Change API Implementation
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket.java
index f96d61bdeb556665d6e6e5023f9d77fd82204e89..ccdc2345465313991f065e1176b58fb7d5e8722f 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket.java
@@ -59,6 +59,14 @@ public class ClientboundSectionBlocksUpdatePacket implements Packet<ClientGamePa
}
+ // Paper start - Multi Block Change API
+ public ClientboundSectionBlocksUpdatePacket(SectionPos sectionPos, it.unimi.dsi.fastutil.shorts.Short2ObjectMap<BlockState> blockChanges) {
+ this.sectionPos = sectionPos;
+ this.positions = blockChanges.keySet().toShortArray();
+ this.states = blockChanges.values().toArray(new BlockState[0]);
+ }
+ // Paper end - Multi Block Change API
+
@Override
public void write(FriendlyByteBuf buf) {
buf.writeLong(this.sectionPos.asLong());
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 3c0be3eb7eb79fd2e62845d516f5d9a3c0f8403f..11e144bf561cc3c4dc1d8b712f915cc167f4d4ed 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -850,6 +850,32 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
this.getHandle().connection.send(packet);
}
+ // Paper start
+ @Override
+ public void sendMultiBlockChange(final Map<? extends io.papermc.paper.math.Position, BlockData> blockChanges) {
+ if (this.getHandle().connection == null) return;
+
+ Map<SectionPos, it.unimi.dsi.fastutil.shorts.Short2ObjectMap<net.minecraft.world.level.block.state.BlockState>> sectionMap = new HashMap<>();
+
+ for (Map.Entry<? extends io.papermc.paper.math.Position, BlockData> entry : blockChanges.entrySet()) {
+ BlockData blockData = entry.getValue();
+ BlockPos blockPos = io.papermc.paper.util.MCUtil.toBlockPos(entry.getKey());
+ SectionPos sectionPos = SectionPos.of(blockPos);
+
+ it.unimi.dsi.fastutil.shorts.Short2ObjectMap<net.minecraft.world.level.block.state.BlockState> sectionData = sectionMap.computeIfAbsent(sectionPos, key -> new it.unimi.dsi.fastutil.shorts.Short2ObjectArrayMap<>());
+ sectionData.put(SectionPos.sectionRelativePos(blockPos), ((CraftBlockData) blockData).getState());
+ }
+
+ for (Map.Entry<SectionPos, it.unimi.dsi.fastutil.shorts.Short2ObjectMap<net.minecraft.world.level.block.state.BlockState>> entry : sectionMap.entrySet()) {
+ SectionPos sectionPos = entry.getKey();
+ it.unimi.dsi.fastutil.shorts.Short2ObjectMap<net.minecraft.world.level.block.state.BlockState> blockData = entry.getValue();
+
+ net.minecraft.network.protocol.game.ClientboundSectionBlocksUpdatePacket packet = new net.minecraft.network.protocol.game.ClientboundSectionBlocksUpdatePacket(sectionPos, blockData);
+ this.getHandle().connection.send(packet);
+ }
+ }
+ // Paper end
+
@Override
public void sendBlockChanges(Collection<BlockState> blocks) {
Preconditions.checkArgument(blocks != null, "blocks must not be null");