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89d51d5f29
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.
88 lines
4.3 KiB
Diff
88 lines
4.3 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/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index fa5d634cefcf73afd3e090f91c4c589edb988352..e9a12d9b7c8789f3d07ba5a799c941ca25eb3e63 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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@@ -421,6 +421,36 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
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return this.originWorld;
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}
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// Paper end - Entity origin API
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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.isRemoved() || !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() == LevelStem.END ? 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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public float getBukkitYaw() {
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return this.yRot;
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}
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@@ -2798,6 +2828,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
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}
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this.processPortalCooldown();
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+ if (!io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowUnsafeEndPortalTeleportation) 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 9ee2fd0914ff7836517ca143d51db6150967cb0e..4ba24bced9a2de4616a0418857d3738e0e322ea0 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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@@ -61,16 +61,13 @@ 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).changeDimension(worldserver, PlayerTeleportEvent.TeleportCause.END_PORTAL);
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- return;
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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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+ if (io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowUnsafeEndPortalTeleportation) {
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+ entity.tickEndPortal();
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}
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- // CraftBukkit end
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- entity.changeDimension(worldserver);
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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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