basicparser.java

MilyQQ是一个使用控制台的QQ客户端,基于LumaQQ的核心JQL包开发,只有一个可执行的jar包(MilyQQ.jar),携带方便,由于是Java程序,因此理论上应该可以运行于所有平台,不过基于

/*
* LumaQQ - Java QQ Client
*
* Copyright (C) 2004 luma <[e-mail]>
*
* This program 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//package edu.tsinghua.lumaqq.qq.packets;

import java.nio.ByteBuffer;
/*
import edu.tsinghua.lumaqq.qq.QQ;
import edu.tsinghua.lumaqq.qq.Util;
import edu.tsinghua.lumaqq.qq.beans.QQUser;
import edu.tsinghua.lumaqq.qq.packets.in.AddFriendAuthReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.AddFriendExReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.AdvancedSearchUserReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.AuthorizeReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.ChangeStatusReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.ClusterCommandReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.DeleteFriendReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.DownloadGroupFriendReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.FriendChangeStatusPacket;
import edu.tsinghua.lumaqq.qq.packets.in.FriendDataOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.FriendLevelOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.GetFriendListReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.GetOnlineOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.GetTempClusterOnlineMemberReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.GetUserInfoReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.GroupDataOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.KeepAliveReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.LoginReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.ModifyInfoReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.PrivacyDataOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.ReceiveIMPacket;
import edu.tsinghua.lumaqq.qq.packets.in.RemoveSelfReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.RequestKeyReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.RequestLoginTokenReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.SearchUserReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.SendIMReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.SendSMSReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.SignatureOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.SystemNotificationPacket;
import edu.tsinghua.lumaqq.qq.packets.in.TempSessionOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.UnknownInPacket;
import edu.tsinghua.lumaqq.qq.packets.in.UploadGroupFriendReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.UserPropertyOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.in.WeatherOpReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.out.AddFriendAuthPacket;
import edu.tsinghua.lumaqq.qq.packets.out.AddFriendExPacket;
import edu.tsinghua.lumaqq.qq.packets.out.AdvancedSearchUserPacket;
import edu.tsinghua.lumaqq.qq.packets.out.AuthorizePacket;
import edu.tsinghua.lumaqq.qq.packets.out.ChangeStatusPacket;
import edu.tsinghua.lumaqq.qq.packets.out.ClusterCommandPacket;
import edu.tsinghua.lumaqq.qq.packets.out.DeleteFriendPacket;
import edu.tsinghua.lumaqq.qq.packets.out.DownloadGroupFriendPacket;
import edu.tsinghua.lumaqq.qq.packets.out.FriendDataOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.FriendLevelOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.GetFriendListPacket;
import edu.tsinghua.lumaqq.qq.packets.out.GetOnlineOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.GetUserInfoPacket;
import edu.tsinghua.lumaqq.qq.packets.out.GroupDataOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.KeepAlivePacket;
import edu.tsinghua.lumaqq.qq.packets.out.LoginPacket;
import edu.tsinghua.lumaqq.qq.packets.out.LogoutPacket;
import edu.tsinghua.lumaqq.qq.packets.out.ModifyInfoPacket;
import edu.tsinghua.lumaqq.qq.packets.out.PrivacyDataOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.ReceiveIMReplyPacket;
import edu.tsinghua.lumaqq.qq.packets.out.RemoveSelfPacket;
import edu.tsinghua.lumaqq.qq.packets.out.RequestKeyPacket;
import edu.tsinghua.lumaqq.qq.packets.out.RequestLoginTokenPacket;
import edu.tsinghua.lumaqq.qq.packets.out.SearchUserPacket;
import edu.tsinghua.lumaqq.qq.packets.out.SendIMPacket;
import edu.tsinghua.lumaqq.qq.packets.out.SendSMSPacket;
import edu.tsinghua.lumaqq.qq.packets.out.SignatureOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.TempSessionOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.UnknownOutPacket;
import edu.tsinghua.lumaqq.qq.packets.out.UploadGroupFriendPacket;
import edu.tsinghua.lumaqq.qq.packets.out.UserPropertyOpPacket;
import edu.tsinghua.lumaqq.qq.packets.out.WeatherOpPacket;
*/
/**
 * 基本协议族解析器
 *
 * @author luma
 */
public class BasicParser implements IParser {
	private char command, sequence;
	private int offset;
	private int length;
	private boolean udp;

	private PacketHistory history;

	public BasicParser(PacketHistory h) {
		history = h;
	}

    /**
     * 得到包的命令和序号
     *
     * @param buf
     */
    private void getCommand(ByteBuffer buf) {
	    if(!udp) {
	        command = buf.getChar(offset + 5);
	        sequence = buf.getChar(offset + 7);
	    } else {
	        command = buf.getChar(offset + 3);
	        sequence = buf.getChar(offset + 5);
	    }
    }

	/* (non-Javadoc)
	 * @see edu.tsinghua.lumaqq.qq.packets.IParser#accept(java.nio.ByteBuffer)
	 */
	public boolean accept(ByteBuffer buf) {
		// 保存偏移
		offset = buf.position();
		int bufferLength = buf.limit() - buf.position();
		if(bufferLength <= 0)
		    return false;

		boolean accept = checkTcp(buf);
		if(!accept)
		    accept = checkUdp(buf);

		return accept;
	}

	/**
	 * 检查一个包是否是udp包
	 *
	 * @param buf
	 * 		ByteBuffer
	 * @return
	 * 		true表示是，false表示否
	 */
	private boolean checkUdp(ByteBuffer buf) {
		if(buf.get(offset) == QQ.QQ_HEADER_BASIC_FAMILY) {
			// 首先检查是否UDP方式
		    udp = true;
		    length = buf.limit() - buf.position();
		    if(buf.get(offset + length - 1) == QQ.QQ_TAIL_BASIC_FAMILY) {
		        getCommand(buf);
		        return true;
		    }
		}
		return false;
	}

	/**
	 * 检查一个包是否是tcp包
	 *
	 * @param buf
	 * 		ByteBuffer
	 * @return
	 * 		true表示是
	 */
	private boolean checkTcp(ByteBuffer buf) {
	    // buffer length不大于2则连个长度字段都没有
		int bufferLength = buf.limit() - buf.position();
		if(bufferLength < 2)
		    return false;

		// 如果可读内容小于包长，则这个包还没收完
        length = buf.getChar(offset);
        if(length > bufferLength)
            return false;

        // 再检查包头包尾
        if(buf.get(offset + 2) == QQ.QQ_HEADER_BASIC_FAMILY) {
            udp = false;
            if(buf.get(offset + length - 1) == QQ.QQ_TAIL_BASIC_FAMILY) {
                getCommand(buf);
                return true;
            }
        }

        return false;
	}

	/* (non-Javadoc)
     * @see edu.tsinghua.lumaqq.qq.packets.IParser#getLength()
     */
    public int getLength() {
        return length;
    }

	/* (non-Javadoc)
	 * @see edu.tsinghua.lumaqq.qq.packets.IParser#getHash(java.nio.ByteBuffer)
	 */
	public int getHash(ByteBuffer buf) {
	    return command | (sequence << 16);
	}