Waterfall/BungeeCord-Patches/0023-Better-Decompression-Sanity.patch
2018-09-30 19:17:21 +01:00

63 lines
2.7 KiB
Diff

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