//读取完成时的回调方法
private void ReadComplete(IAsyncResult ar)
{
int bytesRead;
try
{
lock (streamToServer)
{
bytesRead = streamToServer.EndRead(ar);
}
//TODO 服务端断开事件
if (bytesRead == 0)
{
throw new Exception("已断开连接");
}
string[] messageArrive = Model.Decode(bytesRead, buffer);
Array.Clear(buffer, 0, buffer.Length);// 清空缓存，避免脏读
if (messageArrive[0] == Model.Server_Proxy_Start)
{
//传回分配的端口
int remotePort = Convert.ToInt32(messageArrive[1]);
//回传端口号
if (GetPortEvent != null)
{
GetPortEvent(serverIP, remotePort);
}
//销毁转发（如果存在）
if (udpForwardClient != null)
{
removeForward();
}
//开始转发
udpForwardClient = new UdpForwardClient(serverIP, remotePort);
//TODO 其他处理
}
lock (streamToServer)
{
AsyncCallback callBack = new AsyncCallback(ReadComplete);
streamToServer.BeginRead(buffer, 0, BufferSize, callBack, null);
}
}
catch (Exception ex)
{
if (streamToServer != null)
{
streamToServer.Dispose();
}
client.Close();
MessageBox.Show(ex.Message.ToString(), "错误");
removeForward();
}
}
public void removeForward()//销毁转发
{
if (udpForwardClient != null)
{
udpForwardClient.Close();
udpForwardClient = null;
}
}
