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Paper/patches/server/1019-Properly-resend-entities.patch
Jake Potrebic 3e90a19183
Updated Upstream (Bukkit/CraftBukkit) 
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:
304e83eb PR-1002: Improve documentation and implementation of getMaxStackSize
e8215ea2 SPIGOT-7638: Library loader does not seem to resolve every dependency
79c595c0 SPIGOT-7637: Bad logic in checking nullability of AttributeModifier slots

CraftBukkit Changes:
91b1fc3f1 SPIGOT-7644: Fix ItemMeta#getAsString
4e77a81e1 SPIGOT-7615: PlayerLeashEntityEvent cancelled eats lead
996f660f3 Do not remove leash knot if leasing to an existing leash knot gets cancelled
f70367d42 SPIGOT-7643: Fix inverted leash event cancelled usage and remove leash knot if no entity gets leashed
7ddb48294 SPIGOT-7640: Abnormal jumping height of wind charge
080c8711e SPIGOT-7639: Incoming plugin channels not working
ad549847e Open a direct connection instead of pinging mojang server to check if it is reachable
38e2926c5 SPIGOT-7365: DamageCause blocked by shield should trigger invulnerableTime
2024-04-27 18:00:01 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Wed, 7 Dec 2022 17:25:19 -0500
Subject: [PATCH] Properly resend entities
This resolves some issues which caused entities to not be resent correctly.
Entities that are interacted with need to be resent to the client, so we resend all the entity
data to the player whilst making sure not to clear dirty entries from the tracker. This makes
sure that values will be correctly updated to other players.
This also adds utilities to aid in further preventing entity desyncs.
This also also fixes the bug causing cancelling PlayerInteractEvent to cause items to continue
to be used despite being cancelled on the server.
For example, items being consumed but never finishing, shields being put up, etc.
The underlying issue of this is that the client modifies their synced data values,
and so we have to (forcibly) resend them in order for the client to reset their using item state.
See: https://github.com/PaperMC/Paper/pull/1896
== AT ==
public net.minecraft.server.level.ChunkMap$TrackedEntity serverEntity
diff --git a/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java b/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java
index 02bf2705ca1c99023a83a22d92e1962181102297..0f99733660f91280e4c6262cf75b3c9cae86f65a 100644
--- a/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java
+++ b/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java
@@ -50,7 +50,7 @@ public class SynchedEntityData {
}
}
- private <T> SynchedEntityData.DataItem<T> getItem(EntityDataAccessor<T> key) {
+ public <T> SynchedEntityData.DataItem<T> getItem(EntityDataAccessor<T> key) { // Paper - public
return (SynchedEntityData.DataItem<T>) this.itemsById[key.id()]; // CraftBukkit - decompile error
}
@@ -151,6 +151,20 @@ public class SynchedEntityData {
}
}
+ // Paper start
+ // We need to pack all as we cannot rely on "non default values" or "dirty" ones.
+ // Because these values can possibly be desynced on the client.
+ @Nullable
+ public List<SynchedEntityData.DataValue<?>> packAll() {
+ final List<SynchedEntityData.DataValue<?>> list = new ArrayList<>();
+ for (final DataItem<?> dataItem : this.itemsById) {
+ list.add(dataItem.value());
+ }
+
+ return list;
+ }
+ // Paper end
+
public static class DataItem<T> {
final EntityDataAccessor<T> accessor;
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
index abb9a86cd42a34cf722a312068134e820ac21956..f168044d36f22080504da171e5ed31a6f02385ba 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
@@ -556,6 +556,7 @@ public class ServerPlayerGameMode {
}
// Paper end - extend Player Interact cancellation
player.getBukkitEntity().updateInventory(); // SPIGOT-2867
+ this.player.resyncUsingItem(this.player); // Paper - Properly cancel usable items
return (event.useItemInHand() != Event.Result.ALLOW) ? InteractionResult.SUCCESS : InteractionResult.PASS;
} else if (this.gameModeForPlayer == GameType.SPECTATOR) {
MenuProvider itileinventory = iblockdata.getMenuProvider(world, blockposition);
@@ -607,6 +608,11 @@ public class ServerPlayerGameMode {
return enuminteractionresult;
} else {
+ // Paper start - Properly cancel usable items; Cancel only if cancelled + if the interact result is different from default response
+ if (this.interactResult && this.interactResult != cancelledItem) {
+ this.player.resyncUsingItem(this.player);
+ }
+ // Paper end - Properly cancel usable items
return InteractionResult.PASS;
}
}
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 5a99ca1121ef2163b194372c48bf03e95a96b8ea..8e67853a7a93fa736c147e8b2df537746dc8e94f 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2004,6 +2004,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
}
if (cancelled) {
+ this.player.resyncUsingItem(this.player); // Paper - Properly cancel usable items
this.player.getBukkitEntity().updateInventory(); // SPIGOT-2524
return;
}
@@ -2788,7 +2789,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
// Entity in bucket - SPIGOT-4048 and SPIGOT-6859a
if ((entity instanceof Bucketable && entity instanceof LivingEntity && origItem != null && origItem.asItem() == Items.WATER_BUCKET) && (event.isCancelled() || ServerGamePacketListenerImpl.this.player.getInventory().getSelected() == null || ServerGamePacketListenerImpl.this.player.getInventory().getSelected().getItem() != origItem)) {
- ServerGamePacketListenerImpl.this.send(new ClientboundAddEntityPacket(entity));
+ entity.resendPossiblyDesyncedEntityData(ServerGamePacketListenerImpl.this.player); // Paper - The entire mob gets deleted, so resend it.
ServerGamePacketListenerImpl.this.player.containerMenu.sendAllDataToRemote();
}
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index 68446b7532dfbda303293aa9e756644c6fcdffca..a2142930b4d4b05987c90496fb9d733d99040aa0 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -393,7 +393,7 @@ public abstract class PlayerList {
((ServerLevel)player.level()).getChunkSource().chunkMap.addEntity(player); // Paper - Fire PlayerJoinEvent when Player is actually ready; track entity now
// CraftBukkit end
- player.refreshEntityData(player); // CraftBukkit - BungeeCord#2321, send complete data to self on spawn
+ //player.refreshEntityData(player); // CraftBukkit - BungeeCord#2321, send complete data to self on spawn // Paper - THIS IS NOT NEEDED ANYMORE
this.sendLevelInfo(player, worldserver1);
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 8ad2d17615ff489b2fbbb13480dd0b217a42d805..2bc85351e6e52f90da5fdb29d8d042a06132d742 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -704,13 +704,44 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
// CraftBukkit start
public void refreshEntityData(ServerPlayer to) {
- List<SynchedEntityData.DataValue<?>> list = this.getEntityData().getNonDefaultValues();
+ List<SynchedEntityData.DataValue<?>> list = this.entityData.packAll(); // Paper - Update EVERYTHING not just not default
- if (list != null) {
+ if (list != null && to.getBukkitEntity().canSee(this.getBukkitEntity())) { // Paper
to.connection.send(new ClientboundSetEntityDataPacket(this.getId(), list));
}
}
// CraftBukkit end
+ // Paper start
+ // This method should only be used if the data of an entity could have become desynced
+ // due to interactions on the client.
+ public void resendPossiblyDesyncedEntityData(net.minecraft.server.level.ServerPlayer player) {
+ if (this.tracker == null) {
+ return;
+ }
+
+ if (player.getBukkitEntity().canSee(this.getBukkitEntity())) {
+ final net.minecraft.server.level.ServerEntity serverEntity = this.tracker.serverEntity;
+ final List<net.minecraft.network.protocol.Packet<? super net.minecraft.network.protocol.game.ClientGamePacketListener>> list = new java.util.ArrayList<>();
+ serverEntity.sendPairingData(player, list::add);
+ player.connection.send(new net.minecraft.network.protocol.game.ClientboundBundlePacket(list));
+ }
+ }
+
+ // This method allows you to specifically resend certain data accessor keys to the client
+ public void resendPossiblyDesyncedDataValues(List<EntityDataAccessor<?>> keys, ServerPlayer to) {
+ if (!to.getBukkitEntity().canSee(this.getBukkitEntity())) {
+ return;
+ }
+
+ final List<SynchedEntityData.DataValue<?>> values = new java.util.ArrayList<>(keys.size());
+ for (final EntityDataAccessor<?> key : keys) {
+ final SynchedEntityData.DataItem<?> synchedValue = this.entityData.getItem(key);
+ values.add(synchedValue.value());
+ }
+
+ to.connection.send(new ClientboundSetEntityDataPacket(this.id, values));
+ }
+ // Paper end
public boolean equals(Object object) {
return object instanceof Entity ? ((Entity) object).id == this.id : false;
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index b36895bf73c49a28b78807909aefc26466384178..34793f2072e370ee6ec4a969d103dbe1fd230657 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3834,6 +3834,11 @@ public abstract class LivingEntity extends Entity implements Attackable {
return ((Byte) this.entityData.get(LivingEntity.DATA_LIVING_ENTITY_FLAGS) & 2) > 0 ? InteractionHand.OFF_HAND : InteractionHand.MAIN_HAND;
}
+ // Paper start - Properly cancel usable items
+ public void resyncUsingItem(ServerPlayer serverPlayer) {
+ this.resendPossiblyDesyncedDataValues(java.util.List.of(DATA_LIVING_ENTITY_FLAGS), serverPlayer);
+ }
+ // Paper end - Properly cancel usable items
private void updatingUsingItem() {
if (this.isUsingItem()) {
if (ItemStack.isSameItem(this.getItemInHand(this.getUsedItemHand()), this.useItem)) {
diff --git a/src/main/java/net/minecraft/world/entity/animal/Bucketable.java b/src/main/java/net/minecraft/world/entity/animal/Bucketable.java
index cb4a6439e9774bbec07e69b13df8dddd395b9ece..cfe37b4f5e33795ee717d824d86e3a0919129cf5 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Bucketable.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Bucketable.java
@@ -109,8 +109,7 @@ public interface Bucketable {
itemstack1 = CraftItemStack.asNMSCopy(playerBucketFishEvent.getEntityBucket());
if (playerBucketFishEvent.isCancelled()) {
((ServerPlayer) player).containerMenu.sendAllDataToRemote(); // We need to update inventory to resync client's bucket
- ((ServerPlayer) player).connection.send(new ClientboundAddEntityPacket(entity)); // We need to play out these packets as the client assumes the fish is gone
- entity.refreshEntityData((ServerPlayer) player); // Need to send data such as the display name to client
+ entity.resendPossiblyDesyncedEntityData((ServerPlayer) player); // Paper
return Optional.of(InteractionResult.FAIL);
}
entity.playSound(((Bucketable) entity).getPickupSound(), 1.0F, 1.0F);
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index 3ab04c4bdbe26ff7f6f54eb9cdd58376c592fa05..a2d336ceb52b63db5c03432ee7bc94dc6a742b82 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -1010,7 +1010,11 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
return;
}
- entityTracker.broadcast(this.getHandle().getAddEntityPacket());
+ // Paper start, resend possibly desynced entity instead of add entity packet
+ for (ServerPlayerConnection playerConnection : entityTracker.seenBy) {
+ this.getHandle().resendPossiblyDesyncedEntityData(playerConnection.getPlayer());
+ }
+ // Paper end
}
private static PermissibleBase getPermissibleBase() {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftItemFrame.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftItemFrame.java
index 0801bcdee8fcff0d388d302387e4f1d587e0a283..2fcd9b836d42e3549a3b6b921c57a4c103146dff 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftItemFrame.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftItemFrame.java
@@ -39,9 +39,11 @@ public class CraftItemFrame extends CraftHanging implements ItemFrame {
protected void update() {
super.update();
+ // Paper start, don't mark as dirty as this is handled in super.update()
// mark dirty, so that the client gets updated with item and rotation
- this.getHandle().getEntityData().markDirty(net.minecraft.world.entity.decoration.ItemFrame.DATA_ITEM);
- this.getHandle().getEntityData().markDirty(net.minecraft.world.entity.decoration.ItemFrame.DATA_ROTATION);
+ //this.getHandle().getEntityData().markDirty(net.minecraft.world.entity.decoration.ItemFrame.DATA_ITEM);
+ //this.getHandle().getEntityData().markDirty(net.minecraft.world.entity.decoration.ItemFrame.DATA_ROTATION);
+ // Paper end
// update redstone
if (!this.getHandle().generation) {
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