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-rw-r--r--patches/server/1004-Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch169
1 files changed, 169 insertions, 0 deletions
diff --git a/patches/server/1004-Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch b/patches/server/1004-Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch
new file mode 100644
index 0000000000..ae7e0e0b35
--- /dev/null
+++ b/patches/server/1004-Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch
@@ -0,0 +1,169 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <[email protected]>
+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 217018dbdd78af4b89d9d4e7154956593dfa8dae..093c814d6835f20b1208236db96bb40b4611936c 100644
+--- a/src/main/java/net/minecraft/world/level/Explosion.java
++++ b/src/main/java/net/minecraft/world/level/Explosion.java
+@@ -191,6 +191,7 @@ 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 8485ee703f9c18557818ff735001f02e2d119604..5bf0cc83faf973b0072b06b7ec2f02b3ecda8a9b 100644
+--- a/src/main/java/net/minecraft/world/level/Level.java
++++ b/src/main/java/net/minecraft/world/level/Level.java
+@@ -540,6 +540,10 @@ 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 6896d46fce2e466ebee23ac2dc00312ec1beefdb..b60a52788e73de3dcb086c1a4628466b25c9d3ef 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 3dfe79684f662ac7cae4583bfe03a633438b4df7..be74adc86f0ca467f3b59e7b57fd47a8f381d86e 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
+@@ -212,6 +212,12 @@ public class PistonBaseBlock extends DirectionalBlock {
+ @Override
+ public 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) {
+@@ -252,7 +258,7 @@ 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) {
+@@ -288,7 +294,14 @@ 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 e28ac8f7960f648099e5f3607530a406c72e5056..e493b34aa8726ed48f8e5db2ae8ea561cc5b1f75 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
+@@ -189,7 +189,7 @@ public abstract class BlockBehaviour implements FeatureElement {
+ /** @deprecated */
+ @Deprecated
+ public 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;
+
+@@ -285,7 +285,7 @@ public abstract class BlockBehaviour implements FeatureElement {
+ /** @deprecated */
+ @Deprecated
+ public 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
+ }
+
+ /** @deprecated */
+@@ -965,6 +965,12 @@ 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);
+ }
+@@ -1068,7 +1074,7 @@ 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 afdd4ecbff21e2172b390bcbdf74f3c1bbddafcc..bb739f8584dd3847152314aa995800f51907da2f 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;
+ }