/**

 * dnsresolve.c

 * Copyright (C) 2008 Markus Broeker

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <arpa/inet.h>

#include <netdb.h>

#include <netinet/in.h>

int main (int argc, char **argv)

{

    struct addrinfo hints;

    struct addrinfo *result, *rp;

    void *addr = NULL;

    char ip[INET6_ADDRSTRLEN];

    if (argc != 2) {

        fprintf (stderr, "Usage: %s <hostname>\n", argv[0]);

        return EXIT_FAILURE;

    }

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

    hints.ai_family = AF_UNSPEC;

    hints.ai_socktype = SOCK_STREAM;

    if (getaddrinfo (argv[1], NULL, &hints, &result) != 0) {

        perror ("getaddrinfo");

        return EXIT_FAILURE;

    }

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

        if (rp->ai_family == AF_INET6) {

            struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)rp->ai_addr;

            addr = &(ipv6->sin6_addr);

        } else if (rp->ai_family == AF_INET) {

            struct sockaddr_in *ipv4 = (struct sockaddr_in *)rp->ai_addr;

            addr = &(ipv4->sin_addr);

        }

        if (addr != NULL) {

            if (inet_ntop (rp->ai_family, addr, ip, sizeof (ip)) != NULL)

                printf ("%s: %s\n", argv[1], ip);

        }

    }

    if (result != NULL)

        freeaddrinfo (result);

    return EXIT_SUCCESS;

}