c# - 将套接字用于telnet时是否可以禁用ECHO？

Question

我可以阻止服务器回显我发送给它的每个命令吗？
这是我的代码的一部分:

 Socket s = ConnectSocket(server, port);

 if (s == null)
   return ("Connection failed");

 int bytes = 0;
 string ret = "";

 bytes = s.Receive(bytesReceived, bytesReceived.Length, SocketFlags.None);
 ret = Encoding.ASCII.GetString(bytesReceived, 0, bytes);
 //ret="????!????BCM96358 xDSL Router\r\nLogin: "
 ret = ret.Substring(12); //Remove the telnet header: 255,253,1,255, 253, 33,255, 251, 1,255, 251, 3 
//IAC,DO,Echo, IAC,DO,Remote Flow Control, IAC,WILL,Echo, IAC,WILL,Suppress Go Ahead

  request = "Admin\r\n";
  bytesSent = Encoding.ASCII.GetBytes(request);
  s.Send(bytesSent, bytesSent.Length, 0);

  bytes = s.Receive(bytesReceived, bytesReceived.Length, SocketFlags.None);
  ret = Encoding.ASCII.GetString(bytesReceived, 0, bytes);
//ret = "Admin\r\nPassword: "

Answer 1

对我来说，发送此序列已解决了回声问题。

"\xFF\xFB\x01\xFF\xFB\x03"

换句话说，它等于 IAC WILL ECHO IAC WILL SUPPRESS-GO-AHEAD