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63 lines
2.7 KiB
Diff
63 lines
2.7 KiB
Diff
From 0033c8d2a08a7f23abf23ce5519a1a25e152644d Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@techcable.net>
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Date: Fri, 18 Mar 2016 10:53:24 -0700
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Subject: [PATCH] Better Decompression Sanity
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Fixes #40
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diff --git a/proxy/src/main/java/net/md_5/bungee/compress/PacketDecompressor.java b/proxy/src/main/java/net/md_5/bungee/compress/PacketDecompressor.java
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index 21b3ea2b..37fe6ac7 100644
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--- a/proxy/src/main/java/net/md_5/bungee/compress/PacketDecompressor.java
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+++ b/proxy/src/main/java/net/md_5/bungee/compress/PacketDecompressor.java
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@@ -1,5 +1,7 @@
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package net.md_5.bungee.compress;
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+import lombok.*;
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+
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import com.google.common.base.Preconditions;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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@@ -8,9 +10,11 @@ import java.util.List;
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import net.md_5.bungee.jni.zlib.BungeeZlib;
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import net.md_5.bungee.protocol.DefinedPacket;
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+@RequiredArgsConstructor
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public class PacketDecompressor extends MessageToMessageDecoder<ByteBuf>
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{
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+ private final int compressionThreshold;
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private final BungeeZlib zlib = CompressFactory.zlib.newInstance();
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@Override
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@@ -35,12 +39,13 @@ public class PacketDecompressor extends MessageToMessageDecoder<ByteBuf>
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in.skipBytes( in.readableBytes() );
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} else
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{
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+ Preconditions.checkArgument( size >= compressionThreshold, "Decompressed size %s less than compression threshold %s", size, compressionThreshold);
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ByteBuf decompressed = ctx.alloc().directBuffer();
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try
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{
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zlib.process( in, decompressed );
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- Preconditions.checkState( decompressed.readableBytes() == size, "Decompressed packet size mismatch" );
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+ Preconditions.checkArgument( decompressed.readableBytes() == size, "Decompressed size %s is not equal to actual decompressed bytes", size, decompressed.readableBytes());
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out.add( decompressed );
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decompressed = null;
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diff --git a/proxy/src/main/java/net/md_5/bungee/netty/ChannelWrapper.java b/proxy/src/main/java/net/md_5/bungee/netty/ChannelWrapper.java
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index 71df1fd5..4882b8ed 100644
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--- a/proxy/src/main/java/net/md_5/bungee/netty/ChannelWrapper.java
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+++ b/proxy/src/main/java/net/md_5/bungee/netty/ChannelWrapper.java
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@@ -146,7 +146,7 @@ public class ChannelWrapper
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if ( ch.pipeline().get( PacketDecompressor.class ) == null && compressionThreshold != -1 )
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{
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- addBefore( PipelineUtils.PACKET_DECODER, "decompress", new PacketDecompressor() );
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+ addBefore( PipelineUtils.PACKET_DECODER, "decompress", new PacketDecompressor(compressionThreshold) );
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}
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if ( compressionThreshold == -1 )
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{
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--
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2.19.0
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