/*
* LumaQQ - Java QQ Client
*
* Copyright (C) 2004 luma <stubma@163.com>
*
* 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.out;

import java.nio.ByteBuffer;

import edu.tsinghua.lumaqq.qq.PacketParseException;
import edu.tsinghua.lumaqq.qq.QQ;
import edu.tsinghua.lumaqq.qq.packets.OutPacket;

/**
 * <pre>
 * Keep Alive包，這個包的格式是
 * 1. 頭部
 * 2. 用戶的加密的QQ號，4個字節。其實這個部分是可以任意的，無所謂（gaim qq說的，沒試驗過）
 * 3. 尾部
 * </pre>
 *
 * @author 馬若劼
 */
public class KeepAlivePacket extends OutPacket {    
    /**
     * 構造函數
     */
    public KeepAlivePacket() {
        super(QQ.QQ_CMD_KEEP_ALIVE, true);
    }    
    
    /**
     * @param buf
     * @param length
     * @throws PacketParseException
     */
    public KeepAlivePacket(ByteBuffer buf, int length) throws PacketParseException {
        super(buf, length);
    }
    
    /* (non-Javadoc)
     * @see edu.tsinghua.lumaqq.qq.packets.OutPacket#putBody(java.nio.ByteBuffer)
     */
    protected void putBody(ByteBuffer buf) {
        buf.putInt(user.getQQ());
    }
    
    /* (non-Javadoc)
     * @see edu.tsinghua.lumaqq.qq.packets.OutPacket#parseBody(java.nio.ByteBuffer)
     */
    protected void parseBody(ByteBuffer buf) throws PacketParseException {
    }
}