cocos2dx socket 通信(2)

void* GameServer::listenSocketData(void* obj)
{
    byte buffer[5];
    string contents;
    int ret = 0;
    // 先接受4字节，获取服务返回长度
    bool rs = true;
    while(rs)
    {
        contents = ;
        ret = recv(m_socketHandle,buffer,4,0);
        // 服务器关闭
        if(ret == 0)
        {
//            CCLog(Error: server close);
            rs = false;
        }
        if(ret == 4)
        {
            buffer[4]='';
            int packetlen = Utils::bytes2int(buffer);
            CCLOG(packetlen %d,packetlen);
            char buf[packetlen];
            int rets = 0;
            while((ret = recv(m_socketHandle,buf,packetlen-rets,0))>0)
            {
                contents.append(buf,ret);
                packetlen-=ret;
                if(packetlen<=0)
                    break;
            }
            CCLog(recv content:%s
,contents.c_str());
            CCString* str = CCString::create(Utils::getUnPackMsg(contents));
            MTNotificationQueue::sharedNotificationQueue()->postNotification(receivedata, str);
        }else {
            CCLog(Error: recv data Error %d,ret);
        }
    }
    return NULL;
}