IPv6 Connect

Schurke

Hi, ich habe hier:
http://download.oracle.com/javase/1.5.0/docs/guide/net/ipv6_guide/index.html

das gefunden und bin leicht verwirrt.

Modified IPv6-aware C code:

    struct addrinfo *res, *aip;
    struct addrinfo hints;
    int sock = -1;
    int error;

    /* Get host address. Any type of address will do. */
    bzero(&hints, sizeof(hints));
    hints.ai_flags = AI_ALL|AI_ADDRCONFIG;
    hints.ai_socktype = SOCK_STREAM;

    error = getaddrinfo(hostname, servicename, &hints, &res);
    if (error != 0) {
       (void) fprintf(stderr,
          "getaddrinfo: %s for host %s service %s\n",
          gai_strerror(error), hostname, servicename);
       return (-1);
    }
    /* Try all returned addresses until one works */
    for (aip = res; aip != NULL; aip = aip->ai_next) {
       /*
       * Open socket. The address type depends on what
       * getaddrinfo() gave us.
       */
       sock = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
       if (sock == -1) {
          perror("socket");
          freeaddrinfo(res);
          return (-1);
       }

    /* Connect to the host. */
    if (connect(sock, aip->ai_addr, aip->ai_addrlen) == -1) {
       perror("connect");
       (void) close(sock);
       sock = -1;
       continue;
    }
    break;
    }
       freeaddrinfo(res);

wo wird dabei der port der verbindung bestimmt?
und geht das überhaupt so? ich wäre jetzt einen ansatz über sockaddrin6 gefahren

servicename == Port als String

Schurke

Vielen Dank !!!