#include   "unp.h"
static const char *str_fam(int);

int
main(int argc, char **argv)
{
   char         *ptr;


   struct addrinfo hints, *res;
   char                    rhost[NI_MAXHOST];


   bzero(&hints, sizeof(struct addrinfo));
   hints.ai_family = AF_UNSPEC;
   hints.ai_flags |= AI_CANONNAME;

   int n, rc;



   while (--argc > 0) {
      ptr = *++argv;
      if ( (n = getaddrinfo(ptr, NULL, &hints, &res)) != 0)
         err_quit("udp_server error for %s: %s", ptr, gai_strerror(n));

      do{

         if (res->ai_canonname)
            printf("ai_canonname = %s\n", res->ai_canonname);

         printf("address:(%s) %s\n",str_fam(res->ai_family), Sock_ntop(res->ai_addr, res->ai_addrlen));

         /*
                          * Call getnameinfo() to check the reverse mapping.
                          */

         rc = getnameinfo(res->ai_addr, res->ai_addrlen, rhost, NI_MAXHOST, NULL, NULL, NI_NAMEREQD);
         if (rc == 0) {
            printf("\tgetnameinfo: host = %s\n", rhost );
         } else
            printf("getnameinfo returned %d (%s)\n", rc, gai_strerror(rc));



      } while ( (res = res->ai_next) != NULL);

   }
   exit(0);
}
static const char *
str_fam(int family)
{
#ifdef  IPv4
   if (family == AF_INET)
      return("AF_INET");
#endif
#ifdef  IPv6
   if (family == AF_INET6)
      return("AF_INET6");
#endif
#ifdef  UNIXdomain
   if (family == AF_LOCAL)
      return("AF_LOCAL");
#endif
   return("<unknown family>");
}