From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf Date: Fri, 4 Jun 2021 17:06:52 -0400 Subject: [PATCH] Fix dangerous end portal logic End portals could teleport entities during move calls. Stupid logic given the caller will never expect that kind of thing, and will result in all kinds of dupes. Move the tick logic into the post tick, where portaling was designed to happen in the first place. diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java index 4dc8a8fcffddfc6673d5c161be1224d822ad3dab..f646e2230dbf1dd6bfb1a43545d95a4d9895c3d6 100644 --- a/src/main/java/net/minecraft/world/entity/Entity.java +++ b/src/main/java/net/minecraft/world/entity/Entity.java @@ -511,6 +511,36 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource { return chunkMap.playerEntityTrackerTrackMaps[type.ordinal()].getObjectsInRange(MCUtil.getCoordinateKey(this)); } // Paper end - optimise entity tracking + // Paper start - make end portalling safe + public BlockPos portalBlock; + public ServerLevel portalWorld; + public void tickEndPortal() { + BlockPos pos = this.portalBlock; + ServerLevel world = this.portalWorld; + this.portalBlock = null; + this.portalWorld = null; + + if (pos == null || world == null || world != this.level) { + return; + } + + if (this.isPassenger() || this.isVehicle() || !this.canChangeDimensions() || this.isRemoved() || !this.valid || !this.isAlive()) { + return; + } + + ResourceKey resourcekey = world.getTypeKey() == LevelStem.END ? Level.OVERWORLD : Level.END; // CraftBukkit - SPIGOT-6152: send back to main overworld in custom ends + ServerLevel worldserver = world.getServer().getLevel(resourcekey); + + org.bukkit.event.entity.EntityPortalEnterEvent event = new org.bukkit.event.entity.EntityPortalEnterEvent(this.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ())); + event.callEvent(); + + if (this instanceof ServerPlayer) { + ((ServerPlayer)this).changeDimension(worldserver, PlayerTeleportEvent.TeleportCause.END_PORTAL); + return; + } + this.teleportTo(worldserver, null); + } + // Paper end - make end portalling safe public Entity(EntityType type, Level world) { this.id = Entity.ENTITY_COUNTER.incrementAndGet(); @@ -2731,6 +2761,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource { } this.processPortalCooldown(); + this.tickEndPortal(); // Paper - make end portalling safe } } diff --git a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java index 45b427f314da778cc13da9ad6e4e1316790bf1b1..41d7cff39fc37955877668337689b4b26cd8c7cf 100644 --- a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java +++ b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java @@ -53,16 +53,10 @@ public class EndPortalBlock extends BaseEntityBlock { // return; // CraftBukkit - always fire event in case plugins wish to change it } - // CraftBukkit start - Entity in portal - EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ())); - world.getCraftServer().getPluginManager().callEvent(event); - - if (entity instanceof ServerPlayer) { - ((ServerPlayer) entity).changeDimension(worldserver, PlayerTeleportEvent.TeleportCause.END_PORTAL); - return; - } - // CraftBukkit end - entity.changeDimension(worldserver); + // Paper start - move all of this logic into portal tick + entity.portalWorld = ((ServerLevel)world); + entity.portalBlock = pos.immutable(); + // Paper end - move all of this logic into portal tick } }