Get IP address from socket descriptor?

Question

I\'ve opened a TCP socket server (I\'ve omitted a few stuff, it is taken from here

sockfd = socket(p->ai_family, p->ai_socktype,
            p->ai_p         


        

Answer 1

If you want to know who's at the other end of your socket you can use getpeername in Linux. getsockname will tell you who you are. You decide what address you want your server to sit on initially though, at bind time.

You may also find this SO question useful: bind socket to network interface

And the book "Unix Network Programming, vol 1", by W. Richard Stevens.