Paper/patches/server/0792-Hide-unnecessary-itemmeta-from-clients.patch
Nassim Jahnke ef0e5a642d
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
9ae3f10f SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API
48c0c547 PR-786: Add methods to get sounds from entities

CraftBukkit Changes:
5cc9c022a SPIGOT-7152: Handle hand item changing during air interact event
4ffa1acf6 SPIGOT-7154: Players get kicked when interacting with a conversation
4daa21123 SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API
e5d6a9bbf PR-1100: Add methods to get sounds from entities
b7e9f1c8b SPIGOT-7146: Reduce use of Material switch in ItemMeta

Spigot Changes:
4c157bb4 Rebuild patches
2022-09-12 13:31:45 +02:00

108 lines
6.5 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Noah van der Aa <ndvdaa@gmail.com>
Date: Tue, 3 Aug 2021 17:28:27 +0200
Subject: [PATCH] Hide unnecessary itemmeta from clients
diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
index 319dfa82dff1fe188a52bed5aa2d39575853b793..919758363c7b703cb200582768e68c97ce5c807a 100644
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
@@ -311,7 +311,7 @@ public class ServerEntity {
if (!itemstack.isEmpty()) {
// Paper start - prevent oversized data
final ItemStack sanitized = LivingEntity.sanitizeItemStack(itemstack.copy(), false);
- list.add(Pair.of(enumitemslot, sanitized));
+ list.add(Pair.of(enumitemslot, ((LivingEntity) this.entity).stripMeta(sanitized, false))); // Paper - remove unnecessary item meta
// Paper end
}
}
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 678c0b1c37b16e405205933a16f0d2d29359fd12..1d024bfbada440c93b1174568feaa67544f7f0d2 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2816,8 +2816,8 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
}
// Paper end
// SPIGOT-7136 - Allays
- if (entity instanceof Allay) {
- ServerGamePacketListenerImpl.this.send(new ClientboundSetEquipmentPacket(entity.getId(), Arrays.stream(net.minecraft.world.entity.EquipmentSlot.values()).map((slot) -> Pair.of(slot, ((LivingEntity) entity).getItemBySlot(slot).copy())).collect(Collectors.toList())));
+ if (entity instanceof Allay allay) { // Paper
+ ServerGamePacketListenerImpl.this.send(new ClientboundSetEquipmentPacket(entity.getId(), Arrays.stream(net.minecraft.world.entity.EquipmentSlot.values()).map((slot) -> Pair.of(slot, allay.stripMeta(allay.getItemBySlot(slot), true))).collect(Collectors.toList()))); // Paper - remove unnecessary item meta
player.containerMenu.sendAllDataToRemote();
}
}
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index e7560eb298b563231407de832a81bb2c97e3c4cf..d6ecdeab398d7bfde3d760ada0374245f03014b3 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3136,7 +3136,7 @@ public abstract class LivingEntity extends Entity {
// Paper start - prevent oversized data
ItemStack toSend = sanitizeItemStack(itemstack1, true);
- list.add(Pair.of(enumitemslot, toSend));
+ list.add(Pair.of(enumitemslot, stripMeta(toSend, toSend == itemstack1))); // Paper - hide unnecessary item meta
// Paper end
switch (enumitemslot.getType()) {
case HAND:
@@ -3150,6 +3150,59 @@ public abstract class LivingEntity extends Entity {
((ServerLevel) this.level).getChunkSource().broadcast(this, new ClientboundSetEquipmentPacket(this.getId(), list));
}
+ // Paper start - hide unnecessary item meta
+ public ItemStack stripMeta(final ItemStack itemStack, final boolean copyItemStack) {
+ if (itemStack.isEmpty() || (!itemStack.hasTag() && itemStack.getCount() < 2)) {
+ return itemStack;
+ }
+
+ final ItemStack copy = copyItemStack ? itemStack.copy() : itemStack;
+ if (level.paperConfig().anticheat.obfuscation.items.hideDurability) {
+ // Only show damage values for elytra's, since they show a different texture when broken.
+ if (!copy.is(Items.ELYTRA) || copy.getDamageValue() < copy.getMaxDamage() - 1) {
+ copy.setDamageValue(0);
+ }
+ }
+
+ if (level.paperConfig().anticheat.obfuscation.items.hideItemmeta) {
+ // Some resource packs show different textures when there is more than one item. Since this shouldn't provide a big advantage,
+ // we'll tell the client if there's one or (more than) two items.
+ copy.setCount(copy.getCount() > 1 ? 2 : 1);
+ // We can't just strip out display, leather helmets still use the display.color tag.
+ final CompoundTag tag = copy.getTag();
+ if (tag != null) {
+ if (tag.get("display") instanceof CompoundTag displayTag) {
+ displayTag.remove("Lore");
+ displayTag.remove("Name");
+ }
+
+ if (tag.get("Enchantments") instanceof ListTag enchantmentsTag && !enchantmentsTag.isEmpty()) {
+ // The client still renders items with the enchantment glow if the enchantments tag contains at least one (empty) child.
+ ListTag enchantments = new ListTag();
+ CompoundTag fakeEnchantment = new CompoundTag();
+ // Soul speed boots generate client side particles.
+ if (EnchantmentHelper.getItemEnchantmentLevel(Enchantments.SOUL_SPEED, itemStack) > 0) {
+ fakeEnchantment.putString("id", org.bukkit.enchantments.Enchantment.SOUL_SPEED.getKey().asString());
+ fakeEnchantment.putInt("lvl", 1);
+ }
+ enchantments.add(fakeEnchantment);
+ tag.put("Enchantments", enchantments);
+ }
+ tag.remove("AttributeModifiers");
+
+ // Books
+ tag.remove("author");
+ tag.remove("filtered_title");
+ tag.remove("pages");
+ tag.remove("filtered_pages");
+ tag.remove("title");
+ tag.remove("generation");
+ }
+ }
+ return copy;
+ }
+ // Paper end
+
// Paper start - prevent oversized data
public static ItemStack sanitizeItemStack(final ItemStack itemStack, final boolean copyItemStack) {
if (itemStack.isEmpty() || !itemStack.hasTag()) {