Paper/patches/server/0816-ItemStack-damage-API.patch
Owen 89d51d5f29
Allow enabling sand duping (#10191)
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

71 lines
3.4 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sun, 8 May 2022 13:35:45 -0700
Subject: [PATCH] ItemStack damage API
Adds methods notify clients about item breaks and
to simulate damage done to an itemstack and all
the logic associated with damaging them
== AT ==
public net.minecraft.world.entity.LivingEntity entityEventForEquipmentBreak(Lnet/minecraft/world/entity/EquipmentSlot;)B
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index cb585a82e52697d84f3da25a150b663c8c286f58..7ba726584ce4a58654b8a8b9604f0cca762b3f42 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -1074,6 +1074,53 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
throw new IllegalArgumentException(entityCategory + " is an unrecognized entity category");
}
+ @Override
+ public void broadcastSlotBreak(org.bukkit.inventory.EquipmentSlot slot) {
+ this.getHandle().broadcastBreakEvent(org.bukkit.craftbukkit.CraftEquipmentSlot.getNMS(slot));
+ }
+
+ @Override
+ public void broadcastSlotBreak(org.bukkit.inventory.EquipmentSlot slot, Collection<org.bukkit.entity.Player> players) {
+ if (players.isEmpty()) {
+ return;
+ }
+ final net.minecraft.network.protocol.game.ClientboundEntityEventPacket packet = new net.minecraft.network.protocol.game.ClientboundEntityEventPacket(
+ this.getHandle(),
+ net.minecraft.world.entity.LivingEntity.entityEventForEquipmentBreak(org.bukkit.craftbukkit.CraftEquipmentSlot.getNMS(slot))
+ );
+ players.forEach(player -> ((CraftPlayer) player).getHandle().connection.send(packet));
+ }
+
+ @Override
+ public ItemStack damageItemStack(ItemStack stack, int amount) {
+ final net.minecraft.world.item.ItemStack nmsStack;
+ if (stack instanceof CraftItemStack craftItemStack) {
+ if (craftItemStack.handle == null || craftItemStack.handle.isEmpty()) {
+ return stack;
+ }
+ nmsStack = craftItemStack.handle;
+ } else {
+ nmsStack = CraftItemStack.asNMSCopy(stack);
+ stack = CraftItemStack.asCraftMirror(nmsStack); // mirror to capture changes in hurt logic & events
+ }
+ this.damageItemStack0(nmsStack, amount, null);
+ return stack;
+ }
+
+ @Override
+ public void damageItemStack(org.bukkit.inventory.EquipmentSlot slot, int amount) {
+ final net.minecraft.world.entity.EquipmentSlot nmsSlot = org.bukkit.craftbukkit.CraftEquipmentSlot.getNMS(slot);
+ this.damageItemStack0(this.getHandle().getItemBySlot(nmsSlot), amount, nmsSlot);
+ }
+
+ private void damageItemStack0(net.minecraft.world.item.ItemStack nmsStack, int amount, net.minecraft.world.entity.EquipmentSlot slot) {
+ nmsStack.hurtAndBreak(amount, this.getHandle(), livingEntity -> {
+ if (slot != null) {
+ livingEntity.broadcastBreakEvent(slot);
+ }
+ });
+ }
+
@Override
public void knockback(double strength, double directionX, double directionZ) {
Preconditions.checkArgument(strength > 0, "Knockback strength must be > 0");