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Update item data sanitization (#11227)

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Lulu13022002 2024-08-17 22:30:21 +02:00
parent c10949d863
commit 0a041c951d
1 changed files with 24 additions and 16 deletions
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40
patches/server/Prevent-sending-oversized-item-data-in-equipment-and.patch
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@ -13,17 +13,19 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
@@ -0,0 +0,0 @@
+package io.papermc.paper.util;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.UnaryOperator;
+import it.unimi.dsi.fastutil.objects.ObjectArrayList;
+import net.minecraft.network.RegistryFriendlyByteBuf;
+import net.minecraft.network.codec.StreamCodec;
+import net.minecraft.util.Mth;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.Items;
+import net.minecraft.world.item.component.BundleContents;
+import net.minecraft.world.item.component.ChargedProjectiles;
+import net.minecraft.world.item.component.ItemContainerContents;
+import org.apache.commons.lang3.math.Fraction;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
@ -48,26 +50,33 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ if (projectiles.isEmpty()) {
+ return projectiles;
+ }
+ final List<ItemStack> items = projectiles.getItems();
+ final List<ItemStack> sanitized = new ArrayList<>();
+ for (int i = 0; i < Math.min(items.size(), 3); i++) {
+ // we want to preserve item type as vanilla client can change visuals based on type
+ sanitized.add(new ItemStack(items.get(i).getItemHolder()));
+ }
+ return ChargedProjectiles.of(sanitized);
+
+ return ChargedProjectiles.of(List.of(
+ new ItemStack(projectiles.contains(Items.FIREWORK_ROCKET) ? Items.FIREWORK_ROCKET : Items.ARROW)
+ ));
+ }
+
+ private static BundleContents sanitizeBundleContents(final BundleContents contents) {
+ if (contents.isEmpty()) {
+ return contents;
+ }
+
+ // Bundles change their texture based on their fullness.
+ int sizeUsed = 0;
+ for (final ItemStack item : contents.items()) {
+ final int scale = 64 / item.getMaxStackSize();
+ sizeUsed += scale * item.getCount();
+ // A bundles content weight may be anywhere from 0 to, basically, infinity.
+ // A weight of 1 is the usual maximum case
+ int sizeUsed = Mth.mulAndTruncate(contents.weight(), 64);
+ // Early out, *most* bundles should not be overfilled above a weight of one.
+ if (sizeUsed <= 64) return new BundleContents(List.of(new ItemStack(Items.PAPER, Math.max(1, sizeUsed))));
+
+ final List<ItemStack> sanitizedRepresentation = new ObjectArrayList<>(sizeUsed / 64 + 1);
+ while (sizeUsed > 0) {
+ final int stackCount = Math.min(64, sizeUsed);
+ sanitizedRepresentation.add(new ItemStack(Items.PAPER, stackCount));
+ sizeUsed -= stackCount;
+ }
+ // Now we add a single fake item that uses the same amount of slots as all other items.
+ final List<ItemStack> items = new ArrayList<>();
+ items.add(new ItemStack(Items.PAPER, sizeUsed));
+ return new BundleContents(items);
+ // Ensure that potentially overstacked bundles are not represented by empty (count=0) itemstacks.
+ return new BundleContents(sanitizedRepresentation);
+ }
+
+ private static <B, A> StreamCodec<B, A> codec(final StreamCodec<B, A> delegate, final UnaryOperator<A> sanitizer) {
@ -109,7 +118,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+
+ private DataSanitizationUtil() {
+ }
+
+}
diff --git a/src/main/java/net/minecraft/core/component/DataComponents.java b/src/main/java/net/minecraft/core/component/DataComponents.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644