com.xiovr.unibot.bot.network.impl.ConnectionDecoderImpl.java Source code

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Here is the source code for com.xiovr.unibot.bot.network.impl.ConnectionDecoderImpl.java

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/**
 * Copyright (c) 2014 xio4
 * Universal bot for lineage-like games (Archeage, Lineage2 etc)
 *
 * This file is part of Unibot.
 *
 * Unibot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.xiovr.unibot.bot.network.impl;

import java.util.List;

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

import com.xiovr.unibot.bot.network.ConnectionDecoder;
import com.xiovr.unibot.bot.packet.Packet;
import com.xiovr.unibot.bot.packet.PacketPool;

public class ConnectionDecoderImpl extends ByteToMessageDecoder implements ConnectionDecoder

{

    public ConnectionDecoderImpl() {
        super();
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        // System.out.println("Run decoder bytes="+ in.readableBytes());

        for (;;) {
            if (in.readableBytes() < 2)
                return;

            // System.out.println("Decoder size=" + in.readableBytes());
            in.markReaderIndex();

            // int dataLen = in.readUnsignedShort() - 2;
            byte b1 = in.readByte();
            byte b2 = in.readByte();
            int dataLen = (b1 & 0xFF) | ((b2 << 8) & 0xFF00);

            // System.out.println("packet len =" + dataLen);

            // System.out.println("readable bytes =" + in.readableBytes());
            if (in.readableBytes() < dataLen - 2) {
                in.resetReaderIndex();
                return;
            }
            Packet pck = PacketPool.obtain();
            pck.clear();

            byte[] pckArr = pck.getBuf().array();
            // byte[] inArr = in.array();
            in.readBytes(pckArr, 2, dataLen - 2);
            pck.putHeader(dataLen);
            pck.setPosition(dataLen);
            // int rIndex = in.readerIndex();
            // System.arraycopy(inArr, rIndex-2, pckArr, 0, dataLen+2);
            // in.readerIndex(rIndex+dataLen);
            out.add(pck);
            // System.out.println("DECODER END");
        }
    }

}