107 lines
5.3 KiB
Diff
107 lines
5.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <spottedleaf@users.noreply.github.com>
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Date: Fri, 4 Jun 2021 17:06:52 -0400
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Subject: [PATCH] Fix dangerous end portal logic
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End portals could teleport entities during move calls. Stupid
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logic given the caller will never expect that kind of thing,
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and will result in all kinds of dupes.
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Move the tick logic into the post tick, where portaling was
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designed to happen in the first place.
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diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index 779b926921fd435620cbbc69ed6f9931a422b652..25711ab723386db0f448c54e18ef069bfcd0dd99 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
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+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -1020,6 +1020,7 @@ public class ServerPlayer extends Player implements ContainerListener {
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return b(destination, TeleportCause.UNKNOWN);
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}
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+ @Nullable public final Entity changeDimension(ServerLevel worldserver, PlayerTeleportEvent.TeleportCause cause) { return this.b(worldserver, cause); } // Paper - OBFHELPER
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@Nullable
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public Entity b(ServerLevel worldserver, PlayerTeleportEvent.TeleportCause cause) {
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// CraftBukkit end
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index d055b362459e5b4658aa220e16118ee6174c0de4..2462a78d976937cf4737f1ce0bfde2b2b7d5b1f7 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -312,6 +312,37 @@ public abstract class Entity implements Nameable, CommandSource, net.minecraft.s
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}
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// Paper end - optimise entity tracking
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+ // Paper start - make end portalling safe
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+ public BlockPos portalBlock;
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+ public ServerLevel portalWorld;
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+ public void tickEndPortal() {
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+ BlockPos pos = this.portalBlock;
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+ ServerLevel world = this.portalWorld;
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+ this.portalBlock = null;
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+ this.portalWorld = null;
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+
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+ if (pos == null || world == null || world != this.level) {
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+ return;
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+ }
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+
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+ if (this.isPassenger() || this.isVehicle() || !this.canChangeDimensions() || this.removed || !this.valid || !this.isAlive()) {
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+ return;
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+ }
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+
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+ ResourceKey<Level> resourcekey = world.getTypeKey() == DimensionType.END_LOCATION ? Level.OVERWORLD : Level.END; // CraftBukkit - SPIGOT-6152: send back to main overworld in custom ends
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+ ServerLevel worldserver = world.getServer().getLevel(resourcekey);
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+
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+ 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()));
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+ event.callEvent();
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+
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+ if (this instanceof ServerPlayer) {
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+ ((ServerPlayer)this).changeDimension(worldserver, PlayerTeleportEvent.TeleportCause.END_PORTAL);
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+ return;
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+ }
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+ this.teleportTo(worldserver, null);
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+ }
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+ // Paper end - make end portalling safe
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+
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public Entity(EntityType<?> type, Level world) {
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this.id = Entity.ENTITY_COUNTER.incrementAndGet();
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this.passengers = Lists.newArrayList();
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@@ -2297,6 +2328,7 @@ public abstract class Entity implements Nameable, CommandSource, net.minecraft.s
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}
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this.processPortalCooldown();
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+ this.tickEndPortal(); // Paper - make end portalling safe
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}
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}
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diff --git a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
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index 2231680140d0e3c4c10b6722fd13fe0ee55ce294..52884b87b25bef8abfa824f40d02efe3f947f330 100644
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--- a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
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+++ b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
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@@ -3,7 +3,6 @@ package net.minecraft.world.level.block;
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import net.minecraft.core.BlockPos;
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import net.minecraft.resources.ResourceKey;
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import net.minecraft.server.level.ServerLevel;
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-import net.minecraft.server.level.ServerPlayer;
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import net.minecraft.world.entity.Entity;
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import net.minecraft.world.level.BlockGetter;
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import net.minecraft.world.level.Level;
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@@ -50,16 +49,10 @@ public class EndPortalBlock extends BaseEntityBlock {
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// return; // CraftBukkit - always fire event in case plugins wish to change it
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}
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- // CraftBukkit start - Entity in portal
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- EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ()));
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- world.getCraftServer().getPluginManager().callEvent(event);
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-
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- if (entity instanceof ServerPlayer) {
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- ((ServerPlayer) entity).b(worldserver, PlayerTeleportEvent.TeleportCause.END_PORTAL);
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- return;
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- }
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- // CraftBukkit end
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- entity.changeDimension(worldserver);
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+ // Paper start - move all of this logic into portal tick
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+ entity.portalWorld = ((ServerLevel)world);
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+ entity.portalBlock = pos.immutable();
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+ // Paper end - move all of this logic into portal tick
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}
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}
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