80 lines
4.3 KiB
Diff
80 lines
4.3 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 e722cf3a8e816b0c7405e6282591d9fa8d5bfa61..22d1758e52f56b39a2c110f123bdbf80898c4d92 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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@@ -275,6 +275,7 @@ public enum ConnectionProtocol {
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@Nullable
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public Packet<?> createPacket(int id, FriendlyByteBuf buf) {
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+ if (id < 0 || id >= this.idToDeserializer.size()) return null; // Paper
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Function<FriendlyByteBuf, ? extends Packet<T>> function = this.idToDeserializer.get(id);
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return function != null ? function.apply(buf) : null;
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}
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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 5356f6484751e4b4740720aecac90bdfe044283b..ed54479b14dcfc736ac90749106557f0ff537550 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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@@ -8,9 +8,20 @@ import io.netty.handler.codec.CorruptedFrameException;
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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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@Override
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protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> list) {
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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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+ // 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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byte[] bs = new byte[3];
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for(int i = 0; i < bs.length; ++i) {
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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 449f1b2f5dca350dc0912e14c8c2bf3eb4652b92..bcf53ec07b8eeec7a88fb67e6fb908362e6f51b0 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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@@ -32,6 +35,21 @@ 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.getConnection();
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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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