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    • net.minecraft.server.PacketDecompressor Maven / Gradle / Ivy

    package net.minecraft.server;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.DecoderException;

import java.util.List;
import java.util.zip.Inflater;

public class PacketDecompressor extends ByteToMessageDecoder {
	
	private final Inflater a;
	private int b;
	
	public PacketDecompressor(int i) {
		this.b = i;
		this.a = new Inflater();
	}
	
	protected void decode(ChannelHandlerContext channelhandlercontext, ByteBuf bytebuf, List list) throws Exception {
		if (bytebuf.readableBytes() != 0) {
			PacketDataSerializer packetdataserializer = new PacketDataSerializer(bytebuf);
			int i = packetdataserializer.e();
			
			if (i == 0) {
				list.add(packetdataserializer.readBytes(packetdataserializer.readableBytes()));
			} else {
				if (i < this.b) {
					throw new DecoderException("Badly compressed packet - size of " + i + " is below server threshold of " + this.b);
				}
				
				if (i > 2097152) {
					throw new DecoderException("Badly compressed packet - size of " + i + " is larger than protocol maximum of " + 2097152);
				}
				
				byte[] abyte = new byte[packetdataserializer.readableBytes()];
				
				packetdataserializer.readBytes(abyte);
				this.a.setInput(abyte);
				byte[] abyte1 = new byte[i];
				
				this.a.inflate(abyte1);
				list.add(Unpooled.wrappedBuffer(abyte1));
				this.a.reset();
			}
			
		}
	}
	
	public void a(int i) {
		this.b = i;
	}
}
    
    
    
    

    




    
    
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