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Protect Bedrock and End Portal/Frames from being destroyed

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This fixes exploits that let players destroy bedrock by Pistons, explosions
and Mushrooom/Tree generation.

These blocks are designed to not be broken except by creative players/commands.
So protect them from a multitude of methods of destroying them.

A config is provided if you rather let players use these exploits, and let
them destroy the worlds End Portals and get on top of the nether easy.
This commit is contained in:
Aikar 2020-05-14 03:16:31 -04:00
parent 47f11f19a5
commit 49aa9c42db
1 changed files with 117 additions and 0 deletions
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117
Spigot-Server-Patches/Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch Normal file
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 13 May 2020 23:01:26 -0400
Subject: [PATCH] Protect Bedrock and End Portal/Frames from being destroyed
This fixes exploits that let players destroy bedrock by Pistons, explosions
and Mushrooom/Tree generation.
These blocks are designed to not be broken except by creative players/commands.
So protect them from a multitude of methods of destroying them.
A config is provided if you rather let players use these exploits, and let
them destroy the worlds End Portals and get on top of the nether easy.
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -0,0 +0,0 @@ public class PaperConfig {
private static void midTickChunkTasks() {
midTickChunkTasks = getInt("settings.chunk-tasks-per-tick", midTickChunkTasks);
}
+
+ public static boolean allowBlockPermanentBreakingExploits = false;
+ private static void allowBlockPermanentBreakingExploits() {
+ allowBlockPermanentBreakingExploits = getBoolean("allow-perm-block-break-exploits", allowBlockPermanentBreakingExploits);
+ }
+
}
diff --git a/src/main/java/net/minecraft/server/Block.java b/src/main/java/net/minecraft/server/Block.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/Block.java
+++ b/src/main/java/net/minecraft/server/Block.java
@@ -0,0 +0,0 @@ public class Block implements IMaterial {
protected final SoundEffectType stepSound;
protected final Material material;
// Paper start
+ public final boolean isDestroyable() {
+ return com.destroystokyo.paper.PaperConfig.allowBlockPermanentBreakingExploits ||
+ this != Blocks.BEDROCK &&
+ this != Blocks.END_PORTAL_FRAME &&
+ this != Blocks.END_PORTAL &&
+ this != Blocks.END_GATEWAY;
+ }
public co.aikar.timings.Timing timing;
public co.aikar.timings.Timing getTiming() {
if (timing == null) {
@@ -0,0 +0,0 @@ public class Block implements IMaterial {
@Deprecated
public boolean a(IBlockData iblockdata, BlockActionContext blockactioncontext) {
- return this.material.isReplaceable() && (blockactioncontext.getItemStack().isEmpty() || blockactioncontext.getItemStack().getItem() != this.getItem());
+ return this.material.isReplaceable() && (blockactioncontext.getItemStack().isEmpty() || blockactioncontext.getItemStack().getItem() != this.getItem()) && (iblockdata.isDestroyable() || (blockactioncontext.getEntity() != null && blockactioncontext.getEntity().abilities.canInstantlyBuild)); // Paper
}
@Deprecated
@@ -0,0 +0,0 @@ public class Block implements IMaterial {
@Deprecated
public EnumPistonReaction getPushReaction(IBlockData iblockdata) {
- return this.material.getPushReaction();
+ return !blockData.isDestroyable() ? EnumPistonReaction.BLOCK : this.material.getPushReaction(); // Paper
}
public void fallOn(World world, BlockPosition blockposition, Entity entity, float f) {
diff --git a/src/main/java/net/minecraft/server/Explosion.java b/src/main/java/net/minecraft/server/Explosion.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/Explosion.java
+++ b/src/main/java/net/minecraft/server/Explosion.java
@@ -0,0 +0,0 @@ public class Explosion {
for (float f1 = 0.3F; f > 0.0F; f -= 0.22500001F) {
BlockPosition blockposition = new BlockPosition(d4, d5, d6);
IBlockData iblockdata = this.world.getType(blockposition);
+ if (!iblockdata.isDestroyable()) continue; // Paper
Fluid fluid = iblockdata.getFluid(); // Paper
if (!iblockdata.isAir() || !fluid.isEmpty()) {
@@ -0,0 +0,0 @@ public class Explosion {
IBlockData iblockdata = this.world.getType(blockposition);
Block block = iblockdata.getBlock();
- if (!iblockdata.isAir()) {
+ if (!iblockdata.isAir() && iblockdata.isDestroyable()) { // Paper
BlockPosition blockposition1 = blockposition.immutableCopy();
this.world.getMethodProfiler().enter("explosion_blocks");
diff --git a/src/main/java/net/minecraft/server/IBlockData.java b/src/main/java/net/minecraft/server/IBlockData.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/IBlockData.java
+++ b/src/main/java/net/minecraft/server/IBlockData.java
@@ -0,0 +0,0 @@ public class IBlockData extends BlockDataAbstract<Block, IBlockData> implements
return (CraftBlockData) cachedCraftBlockData.clone();
}
// Paper end
+ // Paper start
+ public final boolean isDestroyable() {
+ return getBlock().isDestroyable();
+ }
+ // Paper end
public Material getMaterial() {
return this.getBlock().k(this);
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -0,0 +0,0 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
public boolean setTypeAndData(BlockPosition blockposition, IBlockData iblockdata, int i) {
// CraftBukkit start - tree generation
if (this.captureTreeGeneration) {
+ // Paper start
+ IBlockData type = getType(blockposition);
+ if (!type.isDestroyable()) return false;
+ // Paper end
CraftBlockState blockstate = capturedBlockStates.get(blockposition);
if (blockstate == null) {
blockstate = CapturedBlockState.getTreeBlockState(this, blockposition, i);