How can get local and remote IP address from TCP connect?

yhus · 09-07-2009, 06:11 AM

Hi,

Calling TCP connect from client side resuting four elements of the association 5-tuple to assigned, local-addr, local-process, foreign-addr, foreign-process. Is there any way to get the local and foreign IP address from the system after calling TCP connect in a C++ program?

Thank you.

Kind Regards,

Jupiter

estabroo · 09-07-2009, 08:45 AM

dunno if c++ has native ones, but you could always extern 'C' and use getpeername and getsockname

paulsm4 · 09-07-2009, 01:34 PM

You should also take a look at Beej's Guide. For example:

http://beej.us/guide/bgnet/output/ht...t.html#connect

Code:

    while(1) {  // main accept() loop
        sin_size = sizeof their_addr;
        new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
        if (new_fd == -1) {
            perror("accept");
            continue;
        }

        inet_ntop(their_addr.ss_family,
            get_in_addr((struct sockaddr *)&their_addr),
            s, sizeof s);
        printf("server: got connection from %s\n", s);
        ...