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Paper/patches/server/0779-Fire-EntityChangeBlockEvent-in-more-places.patch
Owen 89d51d5f29
Allow enabling sand duping (#10191) 
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable.
2024-03-03 17:05:34 -05:00

316 lines
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Raw Blame History

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 9 Aug 2021 20:45:46 -0700
Subject: [PATCH] Fire EntityChangeBlockEvent in more places
Co-authored-by: ChristopheG <61288881+chrisgdt@users.noreply.github.com>
diff --git a/src/main/java/net/minecraft/world/entity/LightningBolt.java b/src/main/java/net/minecraft/world/entity/LightningBolt.java
index a298f511c8a7eb208a0dd63b24ec050848a31476..41a3ca4edf4fa662f2af13efd7b78b56e24aa4a7 100644
--- a/src/main/java/net/minecraft/world/entity/LightningBolt.java
+++ b/src/main/java/net/minecraft/world/entity/LightningBolt.java
@@ -98,7 +98,7 @@ public class LightningBolt extends Entity {
}
this.powerLightningRod();
- LightningBolt.clearCopperOnLightningStrike(this.level(), this.getStrikePosition());
+ LightningBolt.clearCopperOnLightningStrike(this.level(), this.getStrikePosition(), this); // Paper - Call EntityChangeBlockEvent
this.gameEvent(GameEvent.LIGHTNING_STRIKE);
}
}
@@ -192,7 +192,7 @@ public class LightningBolt extends Entity {
}
}
- private static void clearCopperOnLightningStrike(Level world, BlockPos pos) {
+ private static void clearCopperOnLightningStrike(Level world, BlockPos pos, Entity lightning) { // Paper - Call EntityChangeBlockEvent
BlockState iblockdata = world.getBlockState(pos);
BlockPos blockposition1;
BlockState iblockdata1;
@@ -206,24 +206,29 @@ public class LightningBolt extends Entity {
}
if (iblockdata1.getBlock() instanceof WeatheringCopper) {
- world.setBlockAndUpdate(blockposition1, WeatheringCopper.getFirst(world.getBlockState(blockposition1)));
+ // Paper start - Call EntityChangeBlockEvent
+ BlockState newBlock = WeatheringCopper.getFirst(world.getBlockState(blockposition1));
+ if (CraftEventFactory.callEntityChangeBlockEvent(lightning, blockposition1, newBlock)) {
+ world.setBlockAndUpdate(blockposition1, newBlock);
+ }
+ // Paper end - Call EntityChangeBlockEvent
BlockPos.MutableBlockPos blockposition_mutableblockposition = pos.mutable();
int i = world.random.nextInt(3) + 3;
for (int j = 0; j < i; ++j) {
int k = world.random.nextInt(8) + 1;
- LightningBolt.randomWalkCleaningCopper(world, blockposition1, blockposition_mutableblockposition, k);
+ LightningBolt.randomWalkCleaningCopper(world, blockposition1, blockposition_mutableblockposition, k, lightning); // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
}
}
}
- private static void randomWalkCleaningCopper(Level world, BlockPos pos, BlockPos.MutableBlockPos mutablePos, int count) {
+ private static void randomWalkCleaningCopper(Level world, BlockPos pos, BlockPos.MutableBlockPos mutablePos, int count, Entity lightning) { // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
mutablePos.set(pos);
for (int j = 0; j < count; ++j) {
- Optional<BlockPos> optional = LightningBolt.randomStepCleaningCopper(world, mutablePos);
+ Optional<BlockPos> optional = LightningBolt.randomStepCleaningCopper(world, mutablePos, lightning); // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
if (optional.isEmpty()) {
break;
@@ -234,7 +239,7 @@ public class LightningBolt extends Entity {
}
- private static Optional<BlockPos> randomStepCleaningCopper(Level world, BlockPos pos) {
+ private static Optional<BlockPos> randomStepCleaningCopper(Level world, BlockPos pos, Entity lightning) { // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
Iterator iterator = BlockPos.randomInCube(world.random, 10, pos, 1).iterator();
BlockPos blockposition1;
@@ -251,6 +256,7 @@ public class LightningBolt extends Entity {
BlockPos blockposition1Final = blockposition1; // CraftBukkit - decompile error
WeatheringCopper.getPrevious(iblockdata).ifPresent((iblockdata1) -> {
+ if (CraftEventFactory.callEntityChangeBlockEvent(lightning, blockposition1Final, iblockdata1)) // Paper - call EntityChangeBlockEvent
world.setBlockAndUpdate(blockposition1Final, iblockdata1); // CraftBukkit - decompile error
});
world.levelEvent(3002, blockposition1, -1);
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java b/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java
index 2c443b421e342ebfbdf941a431ba20560521920b..91b68ee3605afdb845405e455c869e48a7fc9aab 100644
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/TryLaySpawnOnWaterNearLand.java
@@ -27,6 +27,12 @@ public class TryLaySpawnOnWaterNearLand {
BlockPos blockPos3 = blockPos2.above();
if (world.getBlockState(blockPos3).isAir()) {
BlockState blockState = frogSpawn.defaultBlockState();
+ // Paper start
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(entity, blockPos3, blockState)) {
+ isPregnant.erase(); // forgot pregnant memory
+ return true;
+ }
+ // Paper end
world.setBlock(blockPos3, blockState, 3);
world.gameEvent(GameEvent.BLOCK_PLACE, blockPos3, GameEvent.Context.of(entity, blockState));
world.playSound((Player)null, entity, SoundEvents.FROG_LAY_SPAWN, SoundSource.BLOCKS, 1.0F, 1.0F);
diff --git a/src/main/java/net/minecraft/world/item/AxeItem.java b/src/main/java/net/minecraft/world/item/AxeItem.java
index db507638a97b5a33df712c54daff35b21922c0dd..2e75fd06e9e379eb95ebfe55086ffc327706ab2f 100644
--- a/src/main/java/net/minecraft/world/item/AxeItem.java
+++ b/src/main/java/net/minecraft/world/item/AxeItem.java
@@ -38,6 +38,11 @@ public class AxeItem extends DiggerItem {
return InteractionResult.PASS;
} else {
ItemStack itemStack = context.getItemInHand();
+ // Paper start - EntityChangeBlockEvent
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(player, blockPos, optional.get())) {
+ return InteractionResult.PASS;
+ }
+ // Paper end
if (player instanceof ServerPlayer) {
CriteriaTriggers.ITEM_USED_ON_BLOCK.trigger((ServerPlayer)player, blockPos, itemStack);
}
diff --git a/src/main/java/net/minecraft/world/item/EnderEyeItem.java b/src/main/java/net/minecraft/world/item/EnderEyeItem.java
index 1977e702f6af39ebf100c1f2f2edc2d1c4d003b0..cfcd1778b5ae66395400221879dde3575591b23d 100644
--- a/src/main/java/net/minecraft/world/item/EnderEyeItem.java
+++ b/src/main/java/net/minecraft/world/item/EnderEyeItem.java
@@ -43,6 +43,11 @@ public class EnderEyeItem extends Item {
return InteractionResult.SUCCESS;
} else {
BlockState iblockdata1 = (BlockState) iblockdata.setValue(EndPortalFrameBlock.HAS_EYE, true);
+ // Paper start
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(context.getPlayer(), blockposition, iblockdata1)) {
+ return InteractionResult.PASS;
+ }
+ // Paper end
Block.pushEntitiesUp(iblockdata, iblockdata1, world, blockposition);
world.setBlock(blockposition, iblockdata1, 2);
diff --git a/src/main/java/net/minecraft/world/item/HoneycombItem.java b/src/main/java/net/minecraft/world/item/HoneycombItem.java
index 78bdf7c0a058e84cafcd831c6d6f5123c0f168b0..e0cae3b6848af74fefc37a1e3183c501155c4710 100644
--- a/src/main/java/net/minecraft/world/item/HoneycombItem.java
+++ b/src/main/java/net/minecraft/world/item/HoneycombItem.java
@@ -39,6 +39,14 @@ public class HoneycombItem extends Item implements SignApplicator {
return getWaxed(blockState).map((state) -> {
Player player = context.getPlayer();
ItemStack itemStack = context.getItemInHand();
+ // Paper start - EntityChangeBlockEvent
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(player, blockPos, state)) {
+ if (!player.isCreative()) {
+ player.containerMenu.sendAllDataToRemote();
+ }
+ return InteractionResult.PASS;
+ }
+ // Paper end
if (player instanceof ServerPlayer) {
CriteriaTriggers.ITEM_USED_ON_BLOCK.trigger((ServerPlayer)player, blockPos, itemStack);
}
diff --git a/src/main/java/net/minecraft/world/item/PotionItem.java b/src/main/java/net/minecraft/world/item/PotionItem.java
index 5c62741e3a3854a7f674bfec49758f837f3bb9a0..b93ed2896ebeb8ec75eb3cfb717a740c97dd9622 100644
--- a/src/main/java/net/minecraft/world/item/PotionItem.java
+++ b/src/main/java/net/minecraft/world/item/PotionItem.java
@@ -107,6 +107,12 @@ public class PotionItem extends Item {
BlockState iblockdata = world.getBlockState(blockposition);
if (context.getClickedFace() != Direction.DOWN && iblockdata.is(BlockTags.CONVERTABLE_TO_MUD) && PotionUtils.getPotion(itemstack) == Potions.WATER) {
+ // Paper start
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(entityhuman, blockposition, Blocks.MUD.defaultBlockState())) {
+ entityhuman.containerMenu.sendAllDataToRemote();
+ return InteractionResult.PASS;
+ }
+ // Paper end
world.playSound((Player) null, blockposition, SoundEvents.GENERIC_SPLASH, SoundSource.BLOCKS, 1.0F, 1.0F);
entityhuman.setItemInHand(context.getHand(), ItemUtils.createFilledResult(itemstack, entityhuman, new ItemStack(Items.GLASS_BOTTLE)));
entityhuman.awardStat(Stats.ITEM_USED.get(itemstack.getItem()));
diff --git a/src/main/java/net/minecraft/world/item/ShovelItem.java b/src/main/java/net/minecraft/world/item/ShovelItem.java
index 32995cb5efdad0bc34ecacacb78cccd21220ba8d..21212462e6b415e96536a27b2c009d1562f18946 100644
--- a/src/main/java/net/minecraft/world/item/ShovelItem.java
+++ b/src/main/java/net/minecraft/world/item/ShovelItem.java
@@ -36,20 +36,29 @@ public class ShovelItem extends DiggerItem {
Player player = context.getPlayer();
BlockState blockState2 = FLATTENABLES.get(blockState.getBlock());
BlockState blockState3 = null;
+ Runnable afterAction = null; // Paper
if (blockState2 != null && level.getBlockState(blockPos.above()).isAir()) {
- level.playSound(player, blockPos, SoundEvents.SHOVEL_FLATTEN, SoundSource.BLOCKS, 1.0F, 1.0F);
+ afterAction = () -> level.playSound(player, blockPos, SoundEvents.SHOVEL_FLATTEN, SoundSource.BLOCKS, 1.0F, 1.0F); // Paper
blockState3 = blockState2;
} else if (blockState.getBlock() instanceof CampfireBlock && blockState.getValue(CampfireBlock.LIT)) {
+ afterAction = () -> { // Paper
if (!level.isClientSide()) {
level.levelEvent((Player)null, 1009, blockPos, 0);
}
CampfireBlock.dowse(context.getPlayer(), level, blockPos, blockState);
+ }; // Paper
blockState3 = blockState.setValue(CampfireBlock.LIT, Boolean.valueOf(false));
}
if (blockState3 != null) {
if (!level.isClientSide) {
+ // Paper start
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(context.getPlayer(), blockPos, blockState3)) {
+ return InteractionResult.PASS;
+ }
+ afterAction.run();
+ // Paper end
level.setBlock(blockPos, blockState3, 11);
level.gameEvent(GameEvent.BLOCK_CHANGE, blockPos, GameEvent.Context.of(player, blockState3));
if (player != null) {
diff --git a/src/main/java/net/minecraft/world/level/block/CakeBlock.java b/src/main/java/net/minecraft/world/level/block/CakeBlock.java
index 49fe91a8eaeb2580c8ad0166e72540168af605f6..ca1ccedb5a551328ebfad907f39594b220efaefe 100644
--- a/src/main/java/net/minecraft/world/level/block/CakeBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/CakeBlock.java
@@ -62,6 +62,12 @@ public class CakeBlock extends Block {
Block block = Block.byItem(item);
if (block instanceof CandleBlock) {
+ // Paper start - call change block event
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(player, pos, CandleCakeBlock.byCandle(block))) {
+ player.containerMenu.sendAllDataToRemote(); // update inv because candle could decrease
+ return InteractionResult.PASS;
+ }
+ // Paper end - call change block event
if (!player.isCreative()) {
itemstack.shrink(1);
}
@@ -91,6 +97,14 @@ public class CakeBlock extends Block {
if (!player.canEat(false)) {
return InteractionResult.PASS;
} else {
+ // Paper start - call change block event
+ int i = state.getValue(CakeBlock.BITES);
+ final BlockState newState = i < MAX_BITES ? state.setValue(CakeBlock.BITES, i + 1) : world.getFluidState(pos).createLegacyBlock();
+ if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(player, pos, newState)) {
+ ((net.minecraft.server.level.ServerPlayer) player).getBukkitEntity().sendHealthUpdate();
+ return InteractionResult.PASS; // return a non-consume result to cake blocks don't drop their candles
+ }
+ // Paper end - call change block event
player.awardStat(Stats.EAT_CAKE_SLICE);
// CraftBukkit start
// entityhuman.getFoodData().eat(2, 0.1F);
@@ -104,7 +118,7 @@ public class CakeBlock extends Block {
((net.minecraft.server.level.ServerPlayer) player).getBukkitEntity().sendHealthUpdate();
// CraftBukkit end
- int i = (Integer) state.getValue(CakeBlock.BITES);
+ // Paper - move up
world.gameEvent((Entity) player, GameEvent.EAT, pos);
if (i < 6) {
diff --git a/src/main/java/net/minecraft/world/level/block/ComposterBlock.java b/src/main/java/net/minecraft/world/level/block/ComposterBlock.java
index 6cccdd1d19488275ff3fe90838cf1c31e844d517..413b307acaad5823b9e06f49fa2faf561f5f7b9a 100644
--- a/src/main/java/net/minecraft/world/level/block/ComposterBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/ComposterBlock.java
@@ -238,6 +238,11 @@ public class ComposterBlock extends Block implements WorldlyContainerHolder {
if (i < 8 && ComposterBlock.COMPOSTABLES.containsKey(itemstack.getItem())) {
if (i < 7 && !world.isClientSide) {
BlockState iblockdata1 = ComposterBlock.addItem(player, state, world, pos, itemstack);
+ // Paper start - handle cancelled events
+ if (iblockdata1 == null) {
+ return InteractionResult.PASS;
+ }
+ // Paper end
world.levelEvent(1500, pos, state != iblockdata1 ? 1 : 0);
player.awardStat(Stats.ITEM_USED.get(itemstack.getItem()));
@@ -261,11 +266,16 @@ public class ComposterBlock extends Block implements WorldlyContainerHolder {
if (i < 7 && ComposterBlock.COMPOSTABLES.containsKey(stack.getItem())) {
// CraftBukkit start
double rand = world.getRandom().nextDouble();
- BlockState iblockdata1 = ComposterBlock.addItem(user, state, DummyGeneratorAccess.INSTANCE, pos, stack, rand);
- if (state == iblockdata1 || !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(user, pos, iblockdata1)) {
+ BlockState iblockdata1 = null; // Paper
+ if (false && (state == iblockdata1 || !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(user, pos, iblockdata1))) { // Paper - move event call into addItem
return state;
}
iblockdata1 = ComposterBlock.addItem(user, state, world, pos, stack, rand);
+ // Paper start - handle cancelled events
+ if (iblockdata1 == null) {
+ return state;
+ }
+ // Paper end
// CraftBukkit end
stack.shrink(1);
@@ -306,11 +316,13 @@ public class ComposterBlock extends Block implements WorldlyContainerHolder {
return iblockdata1;
}
+ @Nullable // Paper
static BlockState addItem(@Nullable Entity user, BlockState state, LevelAccessor world, BlockPos pos, ItemStack stack) {
// CraftBukkit start
return ComposterBlock.addItem(user, state, world, pos, stack, world.getRandom().nextDouble());
}
+ @Nullable // Paper - make it nullable
static BlockState addItem(@Nullable Entity entity, BlockState iblockdata, LevelAccessor generatoraccess, BlockPos blockposition, ItemStack itemstack, double rand) {
// CraftBukkit end
int i = (Integer) iblockdata.getValue(ComposterBlock.LEVEL);
@@ -321,6 +333,11 @@ public class ComposterBlock extends Block implements WorldlyContainerHolder {
} else {
int j = i + 1;
BlockState iblockdata1 = (BlockState) iblockdata.setValue(ComposterBlock.LEVEL, j);
+ // Paper start - move the EntityChangeBlockEvent here to avoid conflict later for the compost events
+ if (entity != null && !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(entity, blockposition, iblockdata1)) {
+ return null;
+ }
+ // Paper end
generatoraccess.setBlock(blockposition, iblockdata1, 3);
generatoraccess.gameEvent(GameEvent.BLOCK_CHANGE, blockposition, GameEvent.Context.of(entity, iblockdata1));
diff --git a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java
index 67c9009b735429e887e706baf50a6023d572a46c..7956002e2d4d583c27e277562312d27ea6871557 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java
@@ -120,7 +120,7 @@ public class DummyGeneratorAccess implements WorldGenLevel {
@Override
public void gameEvent(GameEvent event, Vec3 emitterPos, GameEvent.Context emitter) {
- // Used by BlockComposter
+ // Used by ComposterBlock
}
@Override
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