udpClient = new UdpClient(new IPEndPoint(IPAddress.Any, GlobalConsts.LOCAL_WAIT_PORT));

            ThreadStart ts = new ThreadStart(udpWait);

            waitThread = new Thread(ts);

            waitThread.Start();

        }

        public void close()

        {

            waitThread.Abort();

            udpClient.Close();

        }

        private void udpWait()

        {

            IPEndPoint remoteHost = null;

            while (udpClient != null && Thread.CurrentThread.ThreadState.Equals(System.Threading.ThreadState.Running ))

            {

                try

                {

                    byte[] buf = udpClient.Receive(ref remoteHost);

                    string bufs = Encoding.UTF8.GetString(buf);

                    if ((bufs.StartsWith("##IP")) && (bufs.EndsWith("#CMD_END##")))

                    {

                        int ip_addr_start_pos = bufs.IndexOf("##IP:") + 5;

                        string ip_address = bufs.Substring(ip_addr_start_pos, bufs.IndexOf("#IPEND#") - ip_addr_start_pos);

                        int port_start_pos = bufs.IndexOf("##PORT:") + 7;

                        int port = Convert.ToInt32(bufs.Substring(port_start_pos, bufs.IndexOf("#PORTEND#") - port_start_pos));

                        //获取传来的ORDER指令，完成对客户端的控制

                        int order_start_pos = bufs.IndexOf("ORDER:") + 6;