是否可以检测套接字是否处于 CLOSE_WAIT 状态? [英] Is it possible to detect if a socket is in the CLOSE_WAIT state?

问题描述

我正在使用 TcpClient 对象来发送和接收数据.当客户端失去连接时，我可以通过使用 TcpView 看到其关联的连接处于 CLOSE_WAIT 状态.是否可以在 C# 中查看套接字的状态?我只是想检测 CLOSE_WAIT 状态，以便我可以关闭服务器端的套接字.我知道我可以等待一段时间接收字节，然后在没有收到任何内容时关闭连接.我宁愿立即关闭套接字及其线程.是否可以在 c# 端检测到套接字的状态?TcpView 程序可以确定这一点.c# 程序可以做到这一点吗?

I am using a TcpClient object to send and receive data. When a client loses its connection, I can see by using TcpView that its associated connection is in a CLOSE_WAIT state. Is it possible in c# to see the state of a socket? I simply want to detect the CLOSE_WAIT state so I can close the socket on the server end. I understand that I can wait to receive bytes for a certain amount of time and then close the connection if nothing is received. I just would rather close the socket and its thread immediately. Is the socket's state able to be detected on the c# side? The TcpView program can determine this. Can a c# program do this?

推荐答案

这并不理想，但如果您查看 socket.Available，它会抛出一个SocketException.不过，您仍然需要检查原因.

It's not ideal, but if you check socket.Available, it'll throw a SocketException. You still need to check the reason, though.

也不太理想，因为有点笨重，就是调用Poll()(使用 SelectRead).如果它返回 true，要么有数据要读取，要么连接关闭.如果没有要读取的数据，那就是您的答案.

Also not ideal, because it's a bit clunky, is to call Poll() (with SelectRead). If it returns true, either there's data to read or the connection is closed. If there's no data to read, then that's your answer.

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