Paper/patches/server/0591-Fix-dangerous-end-portal-logic.patch
2024-01-23 12:47:01 +01:00

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4.1 KiB
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <spottedleaf@users.noreply.github.com>
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 d80d849e9991da00f6aa63913407bf7fd368cadf..4a0c8976df5164423daee48f2d9494e8eb8080a8 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -487,6 +487,36 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
public boolean updatingSectionStatus = false;
// Paper end
+ // 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<Level> 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();
@@ -2844,6 +2874,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
}
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 9ee2fd0914ff7836517ca143d51db6150967cb0e..a0c1db8cfebaa0344012cc0af18d6231cdcdcbb8 100644
--- a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
@@ -61,16 +61,10 @@ 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
}
}