papermc/patches/server/0398-Improve-fix-EntityTargetLivingEntityEvent.patch
Owen 89d51d5f29
Allow enabling sand duping ()
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

48 lines
3.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Fri, 9 Dec 2022 03:10:23 -0800
Subject: [PATCH] Improve/fix EntityTargetLivingEntityEvent
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java b/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java
index 5aeef564cdaabeed88a52635e56073cca3a9d1f1..fe635e46569c67dac1d3581ee930d1bfa8b4030e 100644
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java
@@ -47,17 +47,30 @@ public class StopAttackingIfTargetInvalid {
if (entityinsentient.canAttack(entityliving) && (!shouldForgetIfTargetUnreachable || !StopAttackingIfTargetInvalid.isTiredOfTryingToReachTarget(entityinsentient, behaviorbuilder_b.tryGet(memoryaccessor1))) && entityliving.isAlive() && entityliving.level() == entityinsentient.level() && !alternativeCondition.test(entityliving)) {
return true;
} else {
+ // Paper start - better track target change reason
+ final EntityTargetEvent.TargetReason reason;
+ if (!entityinsentient.canAttack(entityliving)) {
+ reason = EntityTargetEvent.TargetReason.TARGET_INVALID;
+ } else if (shouldForgetIfTargetUnreachable && StopAttackingIfTargetInvalid.isTiredOfTryingToReachTarget(entityinsentient, behaviorbuilder_b.tryGet(memoryaccessor1))) {
+ reason = EntityTargetEvent.TargetReason.FORGOT_TARGET;
+ } else if (!entityliving.isAlive()) {
+ reason = EntityTargetEvent.TargetReason.TARGET_DIED;
+ } else if (entityliving.level() != entityinsentient.level()) {
+ reason = EntityTargetEvent.TargetReason.TARGET_OTHER_LEVEL;
+ } else {
+ reason = EntityTargetEvent.TargetReason.TARGET_INVALID;
+ }
+ // Paper end
// CraftBukkit start
- LivingEntity old = entityinsentient.getBrain().getMemory(MemoryModuleType.ATTACK_TARGET).orElse(null);
- EntityTargetEvent event = CraftEventFactory.callEntityTargetLivingEvent(entityinsentient, null, (old != null && !old.isAlive()) ? EntityTargetEvent.TargetReason.TARGET_DIED : EntityTargetEvent.TargetReason.FORGOT_TARGET);
+ EntityTargetEvent event = CraftEventFactory.callEntityTargetLivingEvent(entityinsentient, null, reason); // Paper
if (event.isCancelled()) {
return false;
}
- if (event.getTarget() == null) {
- memoryaccessor.erase();
- return true;
- }
- entityliving = ((CraftLivingEntity) event.getTarget()).getHandle();
+ // if (event.getTarget() == null) { // Paper - this is wrong, you are skipping the forgetCallback
+ // memoryaccessor.erase();
+ // return true;
+ // }
+ // entityliving = ((CraftLivingEntity) event.getTarget()).getHandle();
// CraftBukkit end
forgetCallback.accept(entityinsentient, entityliving);
memoryaccessor.erase();