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Paper/patches/server/0940-Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation 
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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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/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 083b72ebacfbba22af2230fb69b311aeee62cb6a..ba4006bc7dc31d10f37023cba7995a9621796f73 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -445,6 +445,10 @@ 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/ServerExplosion.java b/src/main/java/net/minecraft/world/level/ServerExplosion.java
index 86656de31b1e33381eddd3ef210122118b31e620..fd1ecedfab037e377e4dded61539689bacc90f80 100644
--- a/src/main/java/net/minecraft/world/level/ServerExplosion.java
+++ b/src/main/java/net/minecraft/world/level/ServerExplosion.java
@@ -150,6 +150,7 @@ public class ServerExplosion implements 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/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index dc242451f397ae6a30b830ef1f211f1a066423a4..0f7b73634930df02d7b0a7f44890597cc2e6deca 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -88,6 +88,21 @@ public class Block extends BlockBehaviour implements ItemLike {
public static final int UPDATE_LIMIT = 512;
protected final StateDefinition<Block, BlockState> stateDefinition;
private BlockState defaultBlockState;
+ // Paper start - Protect Bedrock and End Portal/Frames from being destroyed
+ public final boolean isDestroyable() {
+ return io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowPermanentBlockBreakExploits ||
+ this != Blocks.BARRIER &&
+ 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.STRUCTURE_BLOCK &&
+ this != Blocks.JIGSAW;
+ }
+ // Paper end - Protect Bedrock and End Portal/Frames from being destroyed
@Nullable
private Item item;
private static final int CACHE_SIZE = 256;
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 e841fccb8f298ef692677583b468869f56dc722c..4b51472502d08ea357da437afeb4b581979e9cff 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
@@ -216,6 +216,12 @@ 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) {
@@ -256,7 +262,7 @@ 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) {
@@ -292,7 +298,14 @@ 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 1b988b92e80faa1ac224caf9f9e955ac43a4c45a..95d30c2db7e291d65c24feb114b0f3598d280912 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
@@ -178,7 +178,7 @@ public abstract class BlockBehaviour implements FeatureElement {
}
protected void onExplosionHit(BlockState state, ServerLevel 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;
@@ -257,7 +257,7 @@ 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) {
@@ -945,6 +945,12 @@ 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);
}
@@ -1048,7 +1054,7 @@ 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() {
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 eb409fb5e673d2a343813946cc59cb5da2328eec..83d294f6f48b867d09ea0d339c779011bf4138a5 100644
--- a/src/main/java/net/minecraft/world/level/portal/PortalForcer.java
+++ b/src/main/java/net/minecraft/world/level/portal/PortalForcer.java
@@ -207,6 +207,13 @@ 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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