97 lines
5.3 KiB
Diff
97 lines
5.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Noah van der Aa <ndvdaa@gmail.com>
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Date: Tue, 3 Aug 2021 17:28:27 +0200
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Subject: [PATCH] Hide unnecessary itemmeta from clients
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diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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index 8150330bc55a010c7d0f96421586226631eb72f7..d71cd626bcbefc576f9c05b8885acc9fb2a33cd5 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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@@ -916,6 +916,13 @@ public class PaperWorldConfig {
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behaviorTickRates = loadTickRates("behavior");
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}
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+ public boolean hideItemmetaFromClients = false;
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+ public boolean hideDurabilityFromClients = false;
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+ private void getHideItemmetaFromClients() {
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+ hideItemmetaFromClients = getBoolean("anticheat.obfuscation.items.hide-itemmeta", hideItemmetaFromClients);
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+ hideDurabilityFromClients = getBoolean("anticheat.obfuscation.items.hide-durability", hideDurabilityFromClients);
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+ }
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+
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private com.google.common.collect.Table<String, String, Integer> loadTickRates(String type) {
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log(" " + type + ":");
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com.google.common.collect.Table<String, String, Integer> table = com.google.common.collect.HashBasedTable.create();
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diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
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index d8ef6137133716b9ee519e6e4668d2e1ae5d9ca3..9a6c67b614944f841813ec2892381c3342bc365c 100644
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--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
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+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
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@@ -321,7 +321,7 @@ public class ServerEntity {
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if (!itemstack.isEmpty()) {
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// Paper start - prevent oversized data
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final ItemStack sanitized = LivingEntity.sanitizeItemStack(itemstack.copy(), false);
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- list.add(Pair.of(enumitemslot, sanitized));
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+ list.add(Pair.of(enumitemslot, ((LivingEntity) this.entity).stripMeta(sanitized, false))); // Paper - remove unnecessary item meta
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// Paper end
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}
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}
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diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index 0b8b959e9d51ada4779f88ceceda8c072b083cd5..93b616d1b95e9c112dcd4b6fda9bd467177e6dec 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -3055,7 +3055,7 @@ public abstract class LivingEntity extends Entity {
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// Paper start - prevent oversized data
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ItemStack toSend = sanitizeItemStack(itemstack1, true);
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- list.add(Pair.of(enumitemslot, toSend));
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+ list.add(Pair.of(enumitemslot, stripMeta(toSend, toSend == itemstack1))); // Paper - hide unnecessary item meta
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// Paper end
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switch (enumitemslot.getType()) {
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case HAND:
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@@ -3069,6 +3069,45 @@ public abstract class LivingEntity extends Entity {
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((ServerLevel) this.level).getChunkSource().broadcast(this, new ClientboundSetEquipmentPacket(this.getId(), list));
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}
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+ // Paper start - hide unnecessary item meta
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+ public ItemStack stripMeta(final ItemStack itemStack, final boolean copyItemStack) {
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+ if (itemStack.isEmpty() || (!itemStack.hasTag() && itemStack.getCount() < 2)) {
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+ return itemStack;
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+ }
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+
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+ final ItemStack copy = copyItemStack ? itemStack.copy() : itemStack;
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+ if (level.paperConfig.hideDurabilityFromClients) {
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+ // Only show damage values for elytra's, since they show a different texture when broken.
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+ if (!copy.is(Items.ELYTRA) || copy.getDamageValue() < copy.getMaxDamage() - 1) {
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+ copy.setDamageValue(0);
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+ }
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+ }
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+
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+ if (level.paperConfig.hideItemmetaFromClients) {
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+ // Some resource packs show different textures when there is more than one item. Since this shouldn't provide a big advantage,
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+ // we'll tell the client if there's one or (more than) two items.
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+ copy.setCount(copy.getCount() > 1 ? 2 : 1);
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+ // We can't just strip out display, leather helmets still use the display.color tag.
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+ final CompoundTag tag = copy.getTag();
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+ if (tag != null) {
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+ if (tag.get("display") instanceof CompoundTag displayTag) {
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+ displayTag.remove("Lore");
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+ displayTag.remove("Name");
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+ }
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+
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+ if (tag.get("Enchantments") instanceof ListTag enchantmentsTag && !enchantmentsTag.isEmpty()) {
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+ // The client still renders items with the enchantment glow if the enchantments tag contains at least one (empty) child.
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+ ListTag enchantments = new ListTag();
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+ enchantments.add(new CompoundTag());
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+ tag.put("Enchantments", enchantments);
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+ }
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+ tag.remove("AttributeModifiers");
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+ }
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+ }
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+ return copy;
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+ }
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+ // Paper end
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+
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// Paper end - prevent oversized data
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public static ItemStack sanitizeItemStack(final ItemStack itemStack, final boolean copyItemStack) {
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if (itemStack.isEmpty() || !itemStack.hasTag()) {
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