PaperMC/patches/server/0273-Handle-Large-Packets-disconnecting-client.patch
Nassim Jahnke 31699ae9a8
Updated Upstream (Bukkit/CraftBukkit) (#10242)
* 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:
a6a9d2a4 Remove some old ApiStatus.Experimental annotations
be72314c SPIGOT-7300, PR-829: Add new DamageSource API providing enhanced information about entity damage
b252cf05 SPIGOT-7576, PR-970: Add methods in MushroomCow to change stew effects
b1c689bd PR-902: Add Server#isLoggingIPs to get log-ips configuration
08f86d1c PR-971: Add Player methods for client-side potion effects
2e3024a9 PR-963: Add API for in-world structures
a23292a7 SPIGOT-7530, PR-948: Improve Resource Pack API with new 1.20.3 functionality
1851857b SPIGOT-3071, PR-969: Add entity spawn method with spawn reason
cde4c52a SPIGOT-5553, PR-964: Add EntityKnockbackEvent

CraftBukkit Changes:
38fd4bd50 Fix accidentally renamed internal damage method
80f0ce4be SPIGOT-7300, PR-1180: Add new DamageSource API providing enhanced information about entity damage
7e43f3b16 SPIGOT-7581: Fix typo in BlockMushroom
ea14b7d90 SPIGOT-7576, PR-1347: Add methods in MushroomCow to change stew effects
4c687f243 PR-1259: Add Server#isLoggingIPs to get log-ips configuration
22a541a29 Improve support for per-world game rules
cb7dccce2 PR-1348: Add Player methods for client-side potion effects
b8d6109f0 PR-1335: Add API for in-world structures
4398a1b5b SPIGOT-7577: Make CraftWindCharge#explode discard the entity
e74107678 Fix Crafter maximum stack size
0bb0f4f6a SPIGOT-7530, PR-1314: Improve Resource Pack API with new 1.20.3 functionality
4949f556d SPIGOT-3071, PR-1345: Add entity spawn method with spawn reason
20ac73ca2 PR-1353: Fix Structure#place not working as documented with 0 palette
3c1b77871 SPIGOT-6911, PR-1349: Change max book length in CraftMetaBook
333701839 SPIGOT-7572: Bee nests generated without bees
f48f4174c SPIGOT-5553, PR-1336: Add EntityKnockbackEvent
2024-02-11 22:28:00 +01:00

135 lines
7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 27 Nov 2018 21:18:06 -0500
Subject: [PATCH] Handle Large Packets disconnecting client
If a players inventory is too big to send in a single packet,
split the inventory set into multiple packets instead.
diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
index 02b3f5c67b47a098f7fe15ddba0df6cb586a9ae5..157f055df00faf3a7870df8109e84fdb12f55964 100644
--- a/src/main/java/net/minecraft/network/Connection.java
+++ b/src/main/java/net/minecraft/network/Connection.java
@@ -156,6 +156,22 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
}
public void exceptionCaught(ChannelHandlerContext channelhandlercontext, Throwable throwable) {
+ // Paper start - Handle large packets disconnecting client
+ if (throwable instanceof io.netty.handler.codec.EncoderException && throwable.getCause() instanceof PacketEncoder.PacketTooLargeException packetTooLargeException) {
+ final Packet<?> packet = packetTooLargeException.getPacket();
+ final io.netty.util.Attribute<ConnectionProtocol.CodecData<?>> codecDataAttribute = channelhandlercontext.channel().attr(packetTooLargeException.codecKey);
+ if (packet.packetTooLarge(this)) {
+ ProtocolSwapHandler.swapProtocolIfNeeded(codecDataAttribute, packet);
+ return;
+ } else if (packet.isSkippable()) {
+ Connection.LOGGER.debug("Skipping packet due to errors", throwable.getCause());
+ ProtocolSwapHandler.swapProtocolIfNeeded(codecDataAttribute, packet);
+ return;
+ } else {
+ throwable = throwable.getCause();
+ }
+ }
+ // Paper end - Handle large packets disconnecting client
if (throwable instanceof SkipPacketException) {
Connection.LOGGER.debug("Skipping packet due to errors", throwable.getCause());
} else {
diff --git a/src/main/java/net/minecraft/network/PacketEncoder.java b/src/main/java/net/minecraft/network/PacketEncoder.java
index 7070d093c80033b61a9c8495bc56153d986b6b03..61f05f34ca33837c643f2915e753ec3935a38314 100644
--- a/src/main/java/net/minecraft/network/PacketEncoder.java
+++ b/src/main/java/net/minecraft/network/PacketEncoder.java
@@ -41,7 +41,7 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
int j = friendlyByteBuf.writerIndex();
packet.write(friendlyByteBuf);
int k = friendlyByteBuf.writerIndex() - j;
- if (k > 8388608) {
+ if (false && k > 8388608) { // Paper - Handle large packets disconnecting client; disable
throw new IllegalArgumentException("Packet too big (is " + k + ", should be less than 8388608): " + packet);
}
@@ -54,10 +54,35 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
throw var13;
} finally {
+ // Paper start - Handle large packets disconnecting client
+ int packetLength = friendlyByteBuf.readableBytes();
+ if (packetLength > MAX_PACKET_SIZE) {
+ throw new PacketTooLargeException(packet, this.codecKey, packetLength);
+ }
+ // Paper end - Handle large packets disconnecting client
ProtocolSwapHandler.swapProtocolIfNeeded(attribute, packet);
}
}
}
}
+
+ // Paper start
+ private static int MAX_PACKET_SIZE = 8388608;
+
+ public static class PacketTooLargeException extends RuntimeException {
+ private final Packet<?> packet;
+ public final AttributeKey<ConnectionProtocol.CodecData<?>> codecKey;
+
+ PacketTooLargeException(Packet<?> packet, AttributeKey<ConnectionProtocol.CodecData<?>> codecKey, int packetLength) {
+ super("PacketTooLarge - " + packet.getClass().getSimpleName() + " is " + packetLength + ". Max is " + MAX_PACKET_SIZE);
+ this.packet = packet;
+ this.codecKey = codecKey;
+ }
+
+ public Packet<?> getPacket() {
+ return this.packet;
+ }
+ }
+ // Paper end
}
diff --git a/src/main/java/net/minecraft/network/protocol/Packet.java b/src/main/java/net/minecraft/network/protocol/Packet.java
index 700418bb0c9fbed3f161611881b1e222248ca4eb..cc658a61065d5c0021a4b88fa58b40211b94f8ec 100644
--- a/src/main/java/net/minecraft/network/protocol/Packet.java
+++ b/src/main/java/net/minecraft/network/protocol/Packet.java
@@ -10,6 +10,12 @@ public interface Packet<T extends PacketListener> {
void handle(T listener);
+ // Paper start
+ default boolean packetTooLarge(net.minecraft.network.Connection manager) {
+ return false;
+ }
+ // Paper end
+
default boolean isSkippable() {
return false;
}
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
index 0e076173033278587df2b5dfbd01cc9005651eb5..dbd8b9b09b82c1b75e8be9dc7416d9f0863c8c87 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
@@ -31,6 +31,16 @@ public class ClientboundContainerSetContentPacket implements Packet<ClientGamePa
this.carriedItem = buf.readItem();
}
+ // Paper start
+ @Override
+ public boolean packetTooLarge(net.minecraft.network.Connection manager) {
+ for (int i = 0 ; i < this.items.size() ; i++) {
+ manager.send(new ClientboundContainerSetSlotPacket(this.containerId, this.stateId, i, this.items.get(i)));
+ }
+ return true;
+ }
+ // Paper end
+
@Override
public void write(FriendlyByteBuf buf) {
buf.writeByte(this.containerId);
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
index 932cca4d957c1fc212b7a514ea23e8dc7ab5b9d9..f47eeb70661661610ef1a96dd9da67785825c126 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
@@ -50,7 +50,7 @@ public class ClientboundLevelChunkPacketData {
throw new RuntimeException("Can't read heightmap in packet for [" + x + ", " + z + "]");
} else {
int i = buf.readVarInt();
- if (i > 2097152) {
+ if (i > 2097152) { // Paper - diff on change - if this changes, update PacketEncoder
throw new RuntimeException("Chunk Packet trying to allocate too much memory on read.");
} else {
this.buffer = new byte[i];