#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <libggnet_dns.h>

static void _cb_dns(struct in_addr *, char *, void *);

struct event_base *_ev_base;
char *_name = NULL;
int _answer = 0;

int
main(int argc, char *argv[])
{
  struct ggnet_dns *ggdns;
  struct in_addr ip;
  struct timeval tv;

  if (argc < 2) {
    printf("usage: dnsreverse <fqdn>\n");
    exit(1);
  }
  inet_aton(argv[1], &ip);
  ip.s_addr = ntohl(ip.s_addr);

  bzero(&tv, sizeof(struct timeval));
  tv.tv_sec = 5;

  _ev_base = event_base_new();

  ggdns = ggnet_dns_new(_ev_base);
  ggnet_dns_reverse(ggdns, &ip, _cb_dns, NULL);

  event_base_loopexit(_ev_base, &tv);
  event_base_dispatch(_ev_base);

  if (_answer)
    printf("%x: %s\n", ip.s_addr, _name);
  else
    printf("no answer\n");
  return 0;
}

static void
_cb_dns(struct in_addr *ip, char *name, void *data)
{
  _name = name;
  _answer = 1;
  event_base_loopexit(_ev_base, NULL);
}