Is it necessary to attempt to connect to all addresses returned by getaddrinfo()?
===

[Beej's Simple Client][1] example code iterates over all IP addresses returned from getaddrinfo(), until it can connect to the first one. See the code below.

Is this always necessary, or is it OK to assume that we only have to try to connect to the first address returned by getaddrinfo()? 


    memset(&hints, 0, sizeof hints);
    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;

    if ((rv = getaddrinfo(argv[1], PORT, &hints, &servinfo)) != 0) {
        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
        return 1;
    }

    // ------------------------------------------------------------
    // loop through all the results and connect to the first we can
    for(p = servinfo; p != NULL; p = p->ai_next) {
        if ((sockfd = socket(p->ai_family, p->ai_socktype,
                p->ai_protocol)) == -1) {
            perror("client: socket");
            continue;
        }

        if (connect(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
            close(sockfd);
            perror("client: connect");
            continue;
        }

        break;
    }


  [1]: http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html#simpleclient 