117 lines
6 KiB
Diff
117 lines
6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Andrew Steinborn <git@steinborn.me>
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Date: Sun, 5 Jul 2020 22:38:18 -0400
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Subject: [PATCH] Optimize NetworkManager Exception Handling
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diff --git a/src/main/java/net/minecraft/network/ConnectionProtocol.java b/src/main/java/net/minecraft/network/ConnectionProtocol.java
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index fca778d131aa10e88d5f7ed8d57eda6803318184..47a5ee9db64184f173af5984765e9b6d1a8ec367 100644
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--- a/src/main/java/net/minecraft/network/ConnectionProtocol.java
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+++ b/src/main/java/net/minecraft/network/ConnectionProtocol.java
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@@ -151,6 +151,7 @@ public enum ConnectionProtocol {
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@Nullable
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public Packet<?> createPacket(int id) {
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+ if (id < 0 || id >= this.idToConstructor.size()) return null; // Paper
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Supplier<? extends Packet<T>> supplier = (Supplier) this.idToConstructor.get(id);
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return supplier != null ? (Packet) supplier.get() : null;
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diff --git a/src/main/java/net/minecraft/network/Varint21FrameDecoder.java b/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
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index 8363b63f8dbd16948eeba3f912dc43605ad8db6a..fbebef6525a0872fecc081c7f63f27c1a04e11dc 100644
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--- a/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
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+++ b/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
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@@ -9,11 +9,21 @@ import java.util.List;
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public class Varint21FrameDecoder extends ByteToMessageDecoder {
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+ private final byte[] lenBuf = new byte[3]; // Paper
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public Varint21FrameDecoder() {}
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protected void decode(ChannelHandlerContext channelhandlercontext, ByteBuf bytebuf, List<Object> list) throws Exception {
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+ // Paper start - if channel is not active just discard the packet
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+ if (!channelhandlercontext.channel().isActive()) {
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+ bytebuf.skipBytes(bytebuf.readableBytes());
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+ return;
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+ }
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+ // Paper end
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bytebuf.markReaderIndex();
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- byte[] abyte = new byte[3];
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+ // Paper start - reuse temporary length buffer
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+ byte[] abyte = lenBuf;
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+ java.util.Arrays.fill(abyte, (byte) 0);
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+ // Paper end
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for (int i = 0; i < abyte.length; ++i) {
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if (!bytebuf.isReadable()) {
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diff --git a/src/main/java/net/minecraft/network/protocol/Packet.java b/src/main/java/net/minecraft/network/protocol/Packet.java
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index 22db5d0d2cc33498ca40162c66aa3b5fbf2f569f..3163502cb9bbbb5a00e7f06cf0032b1ad93c354d 100644
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--- a/src/main/java/net/minecraft/network/protocol/Packet.java
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+++ b/src/main/java/net/minecraft/network/protocol/Packet.java
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@@ -2,8 +2,10 @@ package net.minecraft.network.protocol;
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import io.netty.channel.ChannelFuture; // Paper
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import java.io.IOException;
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+import net.minecraft.network.Connection;
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import net.minecraft.network.FriendlyByteBuf;
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import net.minecraft.network.PacketListener;
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+import net.minecraft.server.level.ServerPlayer;
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public interface Packet<T extends PacketListener> {
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@@ -18,17 +20,17 @@ public interface Packet<T extends PacketListener> {
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/**
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* @param player Null if not at PLAY stage yet
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*/
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- default void onPacketDispatch(@javax.annotation.Nullable EntityPlayer player) {}
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+ default void onPacketDispatch(@javax.annotation.Nullable ServerPlayer player) {}
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/**
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* @param player Null if not at PLAY stage yet
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* @param future Can be null if packet was cancelled
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*/
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- default void onPacketDispatchFinish(@javax.annotation.Nullable EntityPlayer player, @javax.annotation.Nullable ChannelFuture future) {}
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+ default void onPacketDispatchFinish(@javax.annotation.Nullable ServerPlayer player, @javax.annotation.Nullable ChannelFuture future) {}
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default boolean hasFinishListener() { return false; }
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default boolean isReady() { return true; }
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default java.util.List<Packet> getExtraPackets() { return null; }
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- default boolean packetTooLarge(NetworkManager manager) {
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+ default boolean packetTooLarge(Connection manager) {
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return false;
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}
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// Paper end
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diff --git a/src/main/java/net/minecraft/network/protocol/PacketUtils.java b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
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index 4ae8201d7dcffeb3298a4e593f978e15ffc5ac15..5812e518222e419da141ab0f70d1e7a3939a0df0 100644
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--- a/src/main/java/net/minecraft/network/protocol/PacketUtils.java
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+++ b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
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@@ -1,6 +1,9 @@
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package net.minecraft.network.protocol;
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+import net.minecraft.network.Connection;
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import net.minecraft.network.PacketListener;
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+import net.minecraft.network.chat.TextComponent;
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+import net.minecraft.network.protocol.game.ClientboundDisconnectPacket;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import co.aikar.timings.MinecraftTimings; // Paper
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@@ -30,6 +33,21 @@ public class PacketUtils {
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try (Timing ignored = timing.startTiming()) { // Paper - timings
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packet.handle(listener);
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} // Paper - timings
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+ // Paper start
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+ catch (Exception e) {
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+ Connection networkmanager = listener.a();
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+ if (networkmanager.getPlayer() != null) {
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+ LOGGER.error("Error whilst processing packet {} for {}[{}]", packet, networkmanager.getPlayer().getScoreboardName(), networkmanager.getRemoteAddress(), e);
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+ } else {
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+ LOGGER.error("Error whilst processing packet {} for connection from {}", packet, networkmanager.getRemoteAddress(), e);
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+ }
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+ TextComponent error = new TextComponent("Packet processing error");
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+ networkmanager.send(new ClientboundDisconnectPacket(error), (future) -> {
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+ networkmanager.disconnect(error);
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+ });
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+ networkmanager.setReadOnly();
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+ }
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+ // Paper end
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} else {
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PacketUtils.LOGGER.debug("Ignoring packet due to disconnection: " + packet);
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}
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