From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Aikar 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 78271b400c79578d043b20a5389a37b1bef9a70d..5f3b0d95cc7e6a0434d78ea7305a70689c41c71c 100644 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java @@ -416,4 +416,17 @@ public class PaperConfig { private static void midTickChunkTasks() { midTickChunkTasks = getInt("settings.chunk-tasks-per-tick", midTickChunkTasks); } + + public static boolean allowBlockPermanentBreakingExploits = false; + private static void allowBlockPermanentBreakingExploits() { + if (config.contains("allow-perm-block-break-exploits")) { + allowBlockPermanentBreakingExploits = config.getBoolean("allow-perm-block-break-exploits", false); + config.set("allow-perm-block-break-exploits", null); + } + + config.set("settings.unsupported-settings.allow-permanent-block-break-exploits-readme", "This setting controls if players should be able to break bedrock, end portals and other intended to be permanent blocks."); + allowBlockPermanentBreakingExploits = getBoolean("settings.unsupported-settings.allow-permanent-block-break-exploits", allowBlockPermanentBreakingExploits); + + } + } diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java index 667a6d645034c67639c01b8221591877bcb87b35..0f0a5fa2be5a7c69291b593a04cad83e069ba5b1 100644 --- a/src/main/java/net/minecraft/world/level/Explosion.java +++ b/src/main/java/net/minecraft/world/level/Explosion.java @@ -151,6 +151,7 @@ public class Explosion { for (float f1 = 0.3F; f > 0.0F; f -= 0.22500001F) { BlockPos blockposition = new BlockPos(d4, d5, d6); BlockState iblockdata = this.level.getBlockState(blockposition); + if (!iblockdata.isDestroyable()) continue; // Paper FluidState fluid = iblockdata.getFluidState(); // Paper Optional optional = this.damageCalculator.a(this, this.level, blockposition, iblockdata, fluid); @@ -304,7 +305,7 @@ public class Explosion { BlockState iblockdata = this.level.getBlockState(blockposition); Block block = iblockdata.getBlock(); - if (!iblockdata.isAir()) { + if (!iblockdata.isAir() && iblockdata.isDestroyable()) { // Paper BlockPos blockposition1 = blockposition.immutable(); this.level.getProfiler().push("explosion_blocks"); diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java index 67ab681a9c9157a420de5fd872bde1fc0de24561..9b50b8030174338c04b60d441b980131e1d593e4 100644 --- a/src/main/java/net/minecraft/world/level/Level.java +++ b/src/main/java/net/minecraft/world/level/Level.java @@ -422,6 +422,10 @@ 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 + BlockState type = getBlockState(pos); + if (!type.isDestroyable()) return false; + // Paper end CraftBlockState blockstate = 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 fca5d175cbef24fb0ee2d0bbedc8d1c0af3eb528..5b84ee4091e354c4b6500f58a31931f2a6827ffc 100644 --- a/src/main/java/net/minecraft/world/level/block/Block.java +++ b/src/main/java/net/minecraft/world/level/block/Block.java @@ -62,6 +62,19 @@ public class Block extends BlockBehaviour implements ItemLike { protected final StateDefinition stateDefinition; private BlockState defaultBlockState; // 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 && + 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 dc9584a30c18d964afd9cc118c81c24a80beba63..40a18302dd682e5ade4ec77ac7f316b6c0f8c112 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 @@ -193,6 +193,12 @@ 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 - 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 (!com.destroystokyo.paper.PaperConfig.allowBlockPermanentBreakingExploits && enumdirection != directionQueuedAs) { + return false; + } + // Paper end - prevent retracting when we're facing the wrong way if (!world.isClientSide) { boolean flag = this.getNeighborSignal(world, pos, enumdirection); @@ -224,7 +230,7 @@ public class PistonBaseBlock extends DirectionalBlock { BlockState iblockdata1 = (BlockState) ((BlockState) Blocks.MOVING_PISTON.defaultBlockState().setValue(MovingPistonBlock.FACING, enumdirection)).setValue(MovingPistonBlock.TYPE, this.isSticky ? PistonType.STICKY : PistonType.DEFAULT); world.setBlock(pos, iblockdata1, 20); - world.setBlockEntity(pos, MovingPistonBlock.newMovingBlockEntity((BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); + world.setBlockEntity(pos, MovingPistonBlock.newMovingBlockEntity((BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); // Paper - diff on change, j is facing direction - copy this above world.blockUpdated(pos, iblockdata1.getBlock()); iblockdata1.updateNeighbourShapes(world, pos, 2); if (this.isSticky) { @@ -253,7 +259,14 @@ public class PistonBaseBlock extends DirectionalBlock { } } } else { - world.removeBlock(pos.relative(enumdirection), false); + // Paper start - fix headless pistons breaking blocks + BlockPos headPos = pos.relative(enumdirection); + if (com.destroystokyo.paper.PaperConfig.allowBlockPermanentBreakingExploits || world.getBlockState(headPos) == Blocks.PISTON_HEAD.defaultBlockState().setValue(FACING, enumdirection)) { // double check to make sure we're not a headless piston. + world.setAir(headPos, false); + } else { + ((ServerLevel)world).getChunkSource().blockChanged(headPos); // ... fix client desync + } + // Paper end - fix headless pistons breaking blocks } 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 57eedaeedaa24bd274fb55c6e4521f1305382645..df2836b071158729728411f5b228cc38dddd4d4e 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 { @Deprecated public boolean canBeReplaced(BlockState state, BlockPlaceContext context) { - return this.material.isReplaceable() && (context.getItemInHand().isEmpty() || context.getItemInHand().getItem() != this.asItem()); + return this.material.isReplaceable() && (context.getItemInHand().isEmpty() || context.getItemInHand().getItem() != this.asItem()) && (state.isDestroyable() || (context.getPlayer() != null && context.getPlayer().abilities.instabuild)); // Paper } @Deprecated @@ -393,7 +393,11 @@ public abstract class BlockBehaviour { public Block getBlock() { return (Block) this.owner; } - + // Paper start + public final boolean isDestroyable() { + return getBlock().isDestroyable(); + } + // Paper end public Material getMaterial() { return this.material; } @@ -483,7 +487,7 @@ public abstract class BlockBehaviour { } public PushReaction getPistonPushReaction() { - return this.getBlock().getPistonPushReaction(this.asState()); + return !isDestroyable() ? PushReaction.BLOCK : this.getBlock().getPistonPushReaction(this.asState()); // Paper } public boolean isSolidRender(BlockGetter world, BlockPos pos) {