Paper/patches/server/0489-Optimize-NetworkManager-Exception-Handling.patch
Shane Freeder aa52bf9e33
Remove "Implement-Chunk-Priority-Urgency-System-for-Chunks" (Fixes #5980)
Mojang made some changes to priorities in 1.17 and it seems that these changes
conflict with the changes made in this patch, which in some cases appears to
cause excessive rescheduling of tasks.

This, however, is not confirmed as such but seems to be the behavior that we're
seeing to cause this issue, if mojang has adopted the changes we suggested,
then a good chunk of this patch may be unneeded, but, this needs a much better
look than I'm currently able to do
2021-08-14 14:55:55 +01:00

80 lines
4.3 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Sun, 5 Jul 2020 22:38:18 -0400
Subject: [PATCH] Optimize NetworkManager Exception Handling
diff --git a/src/main/java/net/minecraft/network/ConnectionProtocol.java b/src/main/java/net/minecraft/network/ConnectionProtocol.java
index 6611aebafb14b83bce3eeb87701e2edc8a0828ab..bb3b450c7e81ba47e1e8b2244d331f2ce44a7ee1 100644
--- a/src/main/java/net/minecraft/network/ConnectionProtocol.java
+++ b/src/main/java/net/minecraft/network/ConnectionProtocol.java
@@ -275,6 +275,7 @@ public enum ConnectionProtocol {
@Nullable
public Packet<?> createPacket(int id, FriendlyByteBuf buf) {
+ if (id < 0 || id >= this.idToDeserializer.size()) return null; // Paper
Function<FriendlyByteBuf, ? extends Packet<T>> function = this.idToDeserializer.get(id);
return function != null ? function.apply(buf) : null;
}
diff --git a/src/main/java/net/minecraft/network/Varint21FrameDecoder.java b/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
index 5356f6484751e4b4740720aecac90bdfe044283b..ed54479b14dcfc736ac90749106557f0ff537550 100644
--- a/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
+++ b/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
@@ -8,9 +8,20 @@ import io.netty.handler.codec.CorruptedFrameException;
import java.util.List;
public class Varint21FrameDecoder extends ByteToMessageDecoder {
+ private final byte[] lenBuf = new byte[3]; // Paper
@Override
protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> list) {
+ // Paper start - if channel is not active just discard the packet
+ if (!channelHandlerContext.channel().isActive()) {
+ byteBuf.skipBytes(byteBuf.readableBytes());
+ return;
+ }
+ // Paper end
byteBuf.markReaderIndex();
+ // Paper start - reuse temporary length buffer
+ byte[] abyte = lenBuf;
+ java.util.Arrays.fill(abyte, (byte) 0);
+ // Paper end
byte[] bs = new byte[3];
for(int i = 0; i < bs.length; ++i) {
diff --git a/src/main/java/net/minecraft/network/protocol/PacketUtils.java b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
index 449f1b2f5dca350dc0912e14c8c2bf3eb4652b92..bcf53ec07b8eeec7a88fb67e6fb908362e6f51b0 100644
--- a/src/main/java/net/minecraft/network/protocol/PacketUtils.java
+++ b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
@@ -1,6 +1,9 @@
package net.minecraft.network.protocol;
+import net.minecraft.network.Connection;
import net.minecraft.network.PacketListener;
+import net.minecraft.network.chat.TextComponent;
+import net.minecraft.network.protocol.game.ClientboundDisconnectPacket;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import co.aikar.timings.MinecraftTimings; // Paper
@@ -32,6 +35,21 @@ public class PacketUtils {
try (Timing ignored = timing.startTiming()) { // Paper - timings
packet.handle(listener);
} // Paper - timings
+ // Paper start
+ catch (Exception e) {
+ Connection networkmanager = listener.getConnection();
+ if (networkmanager.getPlayer() != null) {
+ LOGGER.error("Error whilst processing packet {} for {}[{}]", packet, networkmanager.getPlayer().getScoreboardName(), networkmanager.getRemoteAddress(), e);
+ } else {
+ LOGGER.error("Error whilst processing packet {} for connection from {}", packet, networkmanager.getRemoteAddress(), e);
+ }
+ TextComponent error = new TextComponent("Packet processing error");
+ networkmanager.send(new ClientboundDisconnectPacket(error), (future) -> {
+ networkmanager.disconnect(error);
+ });
+ networkmanager.setReadOnly();
+ }
+ // Paper end
} else {
PacketUtils.LOGGER.debug("Ignoring packet due to disconnection: {}", packet);
}