int connection (char *server, char *port)

    struct addrinfo hints;

    struct addrinfo *result, *rp;

    int sockfd = -1;

    memset (&hints, 0, sizeof (struct addrinfo));

    hints.ai_family = AF_UNSPEC;

    hints.ai_socktype = SOCK_STREAM;

    hints.ai_flags = 0;

    hints.ai_protocol = IPPROTO_TCP;

    if (getaddrinfo (server, port, &hints, &result) != 0) {

        perror ("getaddrinfo");

    for (rp = result; rp != NULL; rp = rp->ai_next) {

        if ((sockfd = socket (rp->ai_family, rp->ai_socktype, rp->ai_protocol)) == -1)

            continue;

        if (connect (sockfd, rp->ai_addr, rp->ai_addrlen) != -1) {

            break;

        }

        close (sockfd);

        sockfd = -1;

    if (result != NULL)

        freeaddrinfo (result);

        printf ("Usage: %s <ipaddr> <service>\n", argv[0]);

    if ((sockfd = connection (argv[1], argv[2])) < 0) {

        printf ("Connection error: %s:%s\n", argv[1], argv[2]);

    if (write (sockfd, "GET / HTTP/1.0\r\n\r\n", 18) == -1) {