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PaperMC/patches/server/0999-Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch
Jake Potrebic 3e90a19183
Updated Upstream (Bukkit/CraftBukkit) 
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
304e83eb PR-1002: Improve documentation and implementation of getMaxStackSize
e8215ea2 SPIGOT-7638: Library loader does not seem to resolve every dependency
79c595c0 SPIGOT-7637: Bad logic in checking nullability of AttributeModifier slots

CraftBukkit Changes:
91b1fc3f1 SPIGOT-7644: Fix ItemMeta#getAsString
4e77a81e1 SPIGOT-7615: PlayerLeashEntityEvent cancelled eats lead
996f660f3 Do not remove leash knot if leasing to an existing leash knot gets cancelled
f70367d42 SPIGOT-7643: Fix inverted leash event cancelled usage and remove leash knot if no entity gets leashed
7ddb48294 SPIGOT-7640: Abnormal jumping height of wind charge
080c8711e SPIGOT-7639: Incoming plugin channels not working
ad549847e Open a direct connection instead of pinging mojang server to check if it is reachable
38e2926c5 SPIGOT-7365: DamageCause blocked by shield should trigger invulnerableTime
2024-04-27 18:00:01 -07:00

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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/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java
index 67c7458619227961e065615853f4ed02559a0723..2826160f3dd951884f17d48c1b3d8f95c90e5856 100644
--- a/src/main/java/net/minecraft/world/level/Explosion.java
+++ b/src/main/java/net/minecraft/world/level/Explosion.java
@@ -192,6 +192,7 @@ public class Explosion {
for (float f1 = 0.3F; f > 0.0F; f -= 0.22500001F) {
BlockPos blockposition = BlockPos.containing(d4, d5, d6);
BlockState iblockdata = this.level.getBlockState(blockposition);
+ if (!iblockdata.isDestroyable()) continue; // Paper - Protect Bedrock and End Portal/Frames from being destroyed
FluidState fluid = iblockdata.getFluidState(); // Paper - Perf: Optimize call to getFluid for explosions
if (!this.level.isInWorldBounds(blockposition)) {
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index ee49f59ba8ce5708fc5e244eba7b1f910cf69263..d3d7abb2d31e8ce9f9c53eca66a83a1c28fec792 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -533,6 +533,10 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
public boolean setBlock(BlockPos pos, BlockState state, int flags, int maxUpdateDepth) {
// CraftBukkit start - tree generation
if (this.captureTreeGeneration) {
+ // Paper start - Protect Bedrock and End Portal/Frames from being destroyed
+ BlockState type = getBlockState(pos);
+ if (!type.isDestroyable()) return false;
+ // Paper end - Protect Bedrock and End Portal/Frames from being destroyed
CraftBlockState blockstate = this.capturedBlockStates.get(pos);
if (blockstate == null) {
blockstate = CapturedBlockState.getTreeBlockState(this, pos, flags);
diff --git a/src/main/java/net/minecraft/world/level/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index 7f0c0ca49e7575c18935b71e3180d112440289f7..054593fc0b8d13f6bf449cc20a1f7ddfd5f1d1f0 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -90,6 +90,19 @@ public class Block extends BlockBehaviour implements ItemLike {
protected final StateDefinition<Block, BlockState> stateDefinition;
private BlockState defaultBlockState;
// Paper start
+ public final boolean isDestroyable() {
+ return io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowPermanentBlockBreakExploits ||
+ this != Blocks.BEDROCK &&
+ this != Blocks.END_PORTAL_FRAME &&
+ this != Blocks.END_PORTAL &&
+ this != Blocks.END_GATEWAY &&
+ this != Blocks.COMMAND_BLOCK &&
+ this != Blocks.REPEATING_COMMAND_BLOCK &&
+ this != Blocks.CHAIN_COMMAND_BLOCK &&
+ this != Blocks.BARRIER &&
+ this != Blocks.STRUCTURE_BLOCK &&
+ this != Blocks.JIGSAW;
+ }
public co.aikar.timings.Timing timing;
public co.aikar.timings.Timing getTiming() {
if (timing == null) {
diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
index e6bfbe2588e0c2a1be14e38d654e889d392ad4db..e0c62227b279a5fe0f3868fbf9ce8c78c515a09c 100644
--- a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
@@ -213,6 +213,12 @@ public class PistonBaseBlock extends DirectionalBlock {
@Override
protected boolean triggerEvent(BlockState state, Level world, BlockPos pos, int type, int data) {
Direction enumdirection = (Direction) state.getValue(PistonBaseBlock.FACING);
+ // Paper start - Protect Bedrock and End Portal/Frames from being destroyed; prevent retracting when we're facing the wrong way (we were replaced before retraction could occur)
+ Direction directionQueuedAs = Direction.from3DDataValue(data & 7); // Paper - copied from below
+ if (!io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowPermanentBlockBreakExploits && enumdirection != directionQueuedAs) {
+ return false;
+ }
+ // Paper end - Protect Bedrock and End Portal/Frames from being destroyed
BlockState iblockdata1 = (BlockState) state.setValue(PistonBaseBlock.EXTENDED, true);
if (!world.isClientSide) {
@@ -253,7 +259,7 @@ public class PistonBaseBlock extends DirectionalBlock {
}
// Paper end - Fix sticky pistons and BlockPistonRetractEvent
world.setBlock(pos, iblockdata2, 20);
- world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata2, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true));
+ world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata2, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); // Paper - Protect Bedrock and End Portal/Frames from being destroyed; diff on change
world.blockUpdated(pos, iblockdata2.getBlock());
iblockdata2.updateNeighbourShapes(world, pos, 2);
if (this.isSticky) {
@@ -289,7 +295,14 @@ public class PistonBaseBlock extends DirectionalBlock {
}
}
} else {
- world.removeBlock(pos.relative(enumdirection), false);
+ // Paper start - Protect Bedrock and End Portal/Frames from being destroyed; fix headless pistons breaking blocks
+ BlockPos headPos = pos.relative(enumdirection);
+ if (io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowPermanentBlockBreakExploits || world.getBlockState(headPos) == Blocks.PISTON_HEAD.defaultBlockState().setValue(FACING, enumdirection)) { // double check to make sure we're not a headless piston.
+ world.removeBlock(headPos, false);
+ } else {
+ ((ServerLevel) world).getChunkSource().blockChanged(headPos); // ... fix client desync
+ }
+ // Paper end - Protect Bedrock and End Portal/Frames from being destroyed
}
world.playSound((Player) null, pos, SoundEvents.PISTON_CONTRACT, SoundSource.BLOCKS, 0.5F, world.random.nextFloat() * 0.15F + 0.6F);
diff --git a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
index c7da359c525522b55763e594a1db0c26a026b73f..55efd0d379bac79935f62446cd3479d1e59361a4 100644
--- a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
+++ b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
@@ -174,7 +174,7 @@ public abstract class BlockBehaviour implements FeatureElement {
}
protected void onExplosionHit(BlockState state, Level world, BlockPos pos, Explosion explosion, BiConsumer<ItemStack, BlockPos> stackMerger) {
- if (!state.isAir() && explosion.getBlockInteraction() != Explosion.BlockInteraction.TRIGGER_BLOCK) {
+ if (!state.isAir() && explosion.getBlockInteraction() != Explosion.BlockInteraction.TRIGGER_BLOCK && state.isDestroyable()) { // Paper - Protect Bedrock and End Portal/Frames from being destroyed
Block block = state.getBlock();
boolean flag = explosion.getIndirectSourceEntity() instanceof Player;
@@ -254,7 +254,7 @@ public abstract class BlockBehaviour implements FeatureElement {
}
protected boolean canBeReplaced(BlockState state, BlockPlaceContext context) {
- return state.canBeReplaced() && (context.getItemInHand().isEmpty() || !context.getItemInHand().is(this.asItem()));
+ return state.canBeReplaced() && (context.getItemInHand().isEmpty() || !context.getItemInHand().is(this.asItem())) && (state.isDestroyable() || (context.getPlayer() != null && context.getPlayer().getAbilities().instabuild)); // Paper - Protect Bedrock and End Portal/Frames from being destroyed
}
protected boolean canBeReplaced(BlockState state, Fluid fluid) {
@@ -896,6 +896,12 @@ public abstract class BlockBehaviour implements FeatureElement {
return this.legacySolid;
}
+ // Paper start - Protect Bedrock and End Portal/Frames from being destroyed
+ public final boolean isDestroyable() {
+ return getBlock().isDestroyable();
+ }
+ // Paper end - Protect Bedrock and End Portal/Frames from being destroyed
+
public boolean isValidSpawn(BlockGetter world, BlockPos pos, EntityType<?> type) {
return this.getBlock().properties.isValidSpawn.test(this.asState(), world, pos, type);
}
@@ -999,7 +1005,7 @@ public abstract class BlockBehaviour implements FeatureElement {
}
public PushReaction getPistonPushReaction() {
- return this.pushReaction;
+ return !this.isDestroyable() ? PushReaction.BLOCK : this.pushReaction; // Paper - Protect Bedrock and End Portal/Frames from being destroyed
}
public boolean isSolidRender(BlockGetter world, BlockPos pos) {
diff --git a/src/main/java/net/minecraft/world/level/portal/PortalForcer.java b/src/main/java/net/minecraft/world/level/portal/PortalForcer.java
index 03dd833d61d5152af3032f23dd1fc4c75da9bc4f..a61959700d5e00739a79eaa617ac383160335f26 100644
--- a/src/main/java/net/minecraft/world/level/portal/PortalForcer.java
+++ b/src/main/java/net/minecraft/world/level/portal/PortalForcer.java
@@ -221,6 +221,13 @@ public class PortalForcer {
for (int j = -1; j < 3; ++j) {
for (int k = -1; k < 4; ++k) {
temp.setWithOffset(pos, portalDirection.getStepX() * j + enumdirection1.getStepX() * distanceOrthogonalToPortal, k, portalDirection.getStepZ() * j + enumdirection1.getStepZ() * distanceOrthogonalToPortal);
+ // Paper start - Protect Bedrock and End Portal/Frames from being destroyed
+ if (!io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowPermanentBlockBreakExploits) {
+ if (!this.level.getBlockState(temp).isDestroyable()) {
+ return false;
+ }
+ }
+ // Paper end - Protect Bedrock and End Portal/Frames from being destroyed
if (k < 0 && !this.level.getBlockState(temp).isSolid()) {
return false;
}
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