44 lines
2.2 KiB
Diff
44 lines
2.2 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 a30fa3d54b70ab63d24dd67a69f39742335aff1e..a79da4bc0ed06ff8ede0a34f00194f927251099b 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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@@ -329,6 +329,7 @@ public enum ConnectionProtocol implements BundlerInfo.Provider {
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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 99b581052f937b0f2d6b5d73de699008c1d51774..81ec2011a93bb94200ad750f4666ba1cd8be11c5 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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- byte[] bs = new byte[3];
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+ // Paper start - reuse temporary length buffer
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+ byte[] bs = lenBuf;
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+ java.util.Arrays.fill(bs, (byte) 0);
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+ // Paper end
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for(int i = 0; i < bs.length; ++i) {
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if (!byteBuf.isReadable()) {
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