Question

I am a bit new to Boost, but I am trying to create a Server that can accept connections from a client on a given port. This Server should also be able to write to the client on the same port.

However, when I attempt to implement both using acceptor_.bind()/acceptor_.listen() as well as socket_.connect(*iterator) the async_accept() fails with an invalid function error.

If I only use acceptor_.bind(), acceptor_.listen() I am able to write to the socket (from the Server to the Client) using async_write().

If I only use socket_.connect() (but comment out the acceptor_.bind(), acceptor_.listen()) I am able to read from the socket (data sent from Client to Server) using async_read_some().

Do I need to create a separate socket object or choose another port? I have reuse address enabled set to True.

Answer 1

Why are you trying to connect() to a client that is already connected to your server? Just write to the existing socket that was accepted for that connection.

If you must connect() a second connection to a client (for example, like the FTP protocol does for data transfers), then don’t specify a port to bind that socket to. Let the OS decide a suitable port to use.