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 68dc68238adc8d288052132e9f70663e8bba1e80..bfaaa80a5b144bd46ff3ea6a782aa87e5c51e8ea 100644 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java @@ -434,4 +434,15 @@ public class PaperConfig { private static void loggerSettings() { deobfuscateStacktraces = getBoolean("settings.loggers.deobfuscate-stacktraces", deobfuscateStacktraces); } + + 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 548f103e648d9670d7434182c6598dc29ae77b57..f0c789d339fe8402c9c2a684d7e0415fa298b20e 100644 --- a/src/main/java/net/minecraft/world/level/Explosion.java +++ b/src/main/java/net/minecraft/world/level/Explosion.java @@ -173,6 +173,7 @@ 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 if (!this.level.isInWorldBounds(blockposition)) { @@ -330,7 +331,7 @@ 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 46adef4de2f9e5888dce1e669619dd0386b90470..9d628996437959e79348679e2c85e07bc138475e 100644 --- a/src/main/java/net/minecraft/world/level/Level.java +++ b/src/main/java/net/minecraft/world/level/Level.java @@ -413,6 +413,10 @@ 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 = 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 b77eda6af8b430311e502465a2590d83555ff6cf..a37213bce34f45898f56a22196b0d5ef1470e812 100644 --- a/src/main/java/net/minecraft/world/level/block/Block.java +++ b/src/main/java/net/minecraft/world/level/block/Block.java @@ -89,6 +89,19 @@ 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 2f1345d3c3671953a806cb243a152e080fbb9108..e9b315fb5a7b466e2ac65ae4ae69e893dd992739 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 @@ -199,6 +199,12 @@ 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); @@ -231,7 +237,7 @@ 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(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata1, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); + world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata1, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); // Paper - diff on change world.blockUpdated(pos, iblockdata1.getBlock()); iblockdata1.updateNeighbourShapes(world, pos, 2); if (this.isSticky) { @@ -260,7 +266,14 @@ 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.removeBlock(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 987a4180a1eb902c512c2e6a36d692cbdd9b1563..e1beb18dfb5529f48c312bf7ff85be18f6c935b5 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 @@ -205,7 +205,7 @@ public abstract class BlockBehaviour { @Deprecated public boolean canBeReplaced(BlockState state, BlockPlaceContext context) { - return this.material.isReplaceable() && (context.getItemInHand().isEmpty() || !context.getItemInHand().is(this.asItem())); + return this.material.isReplaceable() && (context.getItemInHand().isEmpty() || !context.getItemInHand().is(this.asItem())) && (state.isDestroyable() || (context.getPlayer() != null && context.getPlayer().getAbilities().instabuild)); // Paper } @Deprecated @@ -663,7 +663,11 @@ 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; } @@ -761,7 +765,7 @@ 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) { 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 80811386c1006d56824ff4d43830f2a140aaee30..2aa59b14b171ff4efbb113816c04675da0954d0e 100644 --- a/src/main/java/net/minecraft/world/level/portal/PortalForcer.java +++ b/src/main/java/net/minecraft/world/level/portal/PortalForcer.java @@ -210,6 +210,13 @@ 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 - prevent destroying unbreakable blocks + if (!com.destroystokyo.paper.PaperConfig.allowBlockPermanentBreakingExploits) { + if (!this.level.getBlockState(temp).isDestroyable()) { + return false; + } + } + // Paper end - prevent destroying unbreakable blocks if (k < 0 && !this.level.getBlockState(temp).getMaterial().isSolid()) { return false; }