get ip (faq reference)

[ipe]

I found this code on faq. (get the own ip)
But I couldn't understand it. What may I change to make this code work?

http://faq.cprogramming.com/cgi-bin/...&id=1045780608

socklen_t len;
struct sockaddr_in  other, me;

/* ... */
len = sizeof(me);
if (connect(some_socket, (struct sockaddr *) &other, sizeof(other)) == 0)
{
  if (getsockname(some_socket, (struct sockaddr *) &me, &len) != 0)
  {
    /* getsockname( ) error */
  }
}