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I just wanted to know how to use C to automatically assign a free port (and see what was used) if a specific port number is not provided.
For example, i’m using this:
struct sockaddr_in address;
address->sin_family = AF_INET;
address->sin_addr.s_addr = INADDR_ANY;
address->sin_port = htons( port );
But how can I replace the sin_port assignment and let C automatically assign for me?
Thanks!
Matt has already answered the “how to assign a free port” part (use sin_port = 0).
To answer the second part, i.e. “how to see what was used”, use getsockname()