C ++ Windows套接字-在程序退出时关闭套接字

Question

I'm making a simple console client/server application with the WinSock2 api, but I need to make sure that the socket of the client closes properly when exiting the application. I have already tried to use a SetConsoleCtrlHandler but that makes a thread where the main loop keeps running for 10 seconds.

Is there a way to close the socket when the user pressed the close button?

Answer 1

Yes, Wrap native Winsock2 socket with a class that manages it.

class Socket{
  SOCKET m_NativeSocket;

public:
  Socket(){
    m_NativeSocket = ::socket(...);
  }

  ~Socket(){
   ::closesocket(m_NativeSocket);
  }

};

You should follow this pattern because:

1. Sockets are suitable as objects, not just floating variables
2. Adding destructor makes sure that no matter if the application suddenly aborts, an exception is thrown, socket is out of scope - the socket closes properly
3. It's nicer and cleaner to work with sockets as objects.

make sure you implement proper move constructor.