external/bsd/bind/dist/lib/samples/sample-gai.c

   1 /*      $NetBSD: sample-gai.c,v 1.1.1.4 2014/12/10 03:34:46 christos Exp $      */
   2
   3 /*
   4  * Copyright (C) 2009, 2012-2014  Internet Systems Consortium, Inc. ("ISC")
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  11  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  13  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 /* Id: sample-gai.c,v 1.4 2009/09/02 23:48:02 tbox Exp  */
  20
  21 #include <config.h>
  22
  23 #include <isc/net.h>
  24
  25 #include <irs/netdb.h>
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30
  31 static void
  32 do_gai(int family, char *hostname) {
  33         struct addrinfo hints, *res, *res0;
  34         int error;
  35         char namebuf[1024], addrbuf[1024], servbuf[1024];
  36
  37         memset(&hints, 0, sizeof(hints));
  38         hints.ai_family = family;
  39         hints.ai_socktype = SOCK_STREAM;
  40         hints.ai_flags = AI_CANONNAME;
  41         error = getaddrinfo(hostname, "http", &hints, &res0);
  42         if (error) {
  43                 fprintf(stderr, "getaddrinfo failed for %s,family=%d: %s\n",
  44                         hostname, family, gai_strerror(error));
  45                 return;
  46         }
  47
  48         for (res = res0; res; res = res->ai_next) {
  49                 error = getnameinfo(res->ai_addr,
  50                                     (socklen_t)res->ai_addrlen,
  51                                     addrbuf, sizeof(addrbuf),
  52                                     NULL, 0, NI_NUMERICHOST);
  53                 if (error == 0)
  54                         error = getnameinfo(res->ai_addr,
  55                                             (socklen_t)res->ai_addrlen,
  56                                             namebuf, sizeof(namebuf),
  57                                             servbuf, sizeof(servbuf), 0);
  58                 if (error != 0) {
  59                         fprintf(stderr, "getnameinfo failed: %s\n",
  60                                 gai_strerror(error));
  61                 } else {
  62                         printf("%s(%s/%s)=%s:%s\n", hostname,
  63                                res->ai_canonname, addrbuf, namebuf, servbuf);
  64                 }
  65         }
  66
  67         freeaddrinfo(res0);
  68 }
  69
  70 int
  71 main(int argc, char *argv[]) {
  72         if (argc < 2)
  73                 exit(1);
  74
  75         do_gai(AF_INET, argv[1]);
  76         do_gai(AF_INET6, argv[1]);
  77         do_gai(AF_UNSPEC, argv[1]);
  78
  79         return (0);
  80 }