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

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2009  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 <sys/types.h>
  24 #include <sys/socket.h>
  25
  26 #include <irs/netdb.h>
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31
  32 static void
  33 do_gai(int family, char *hostname) {
  34         struct addrinfo hints, *res, *res0;
  35         int error;
  36         char namebuf[1024], addrbuf[1024], servbuf[1024];
  37
  38         memset(&hints, 0, sizeof(hints));
  39         hints.ai_family = family;
  40         hints.ai_socktype = SOCK_STREAM;
  41         hints.ai_flags = AI_CANONNAME;
  42         error = getaddrinfo(hostname, "http", &hints, &res0);
  43         if (error) {
  44                 fprintf(stderr, "getaddrinfo failed for %s,family=%d: %s\n",
  45                         hostname, family, gai_strerror(error));
  46                 return;
  47         }
  48
  49         for (res = res0; res; res = res->ai_next) {
  50                 error = getnameinfo(res->ai_addr, res->ai_addrlen,
  51                                     addrbuf, sizeof(addrbuf),
  52                                     NULL, 0, NI_NUMERICHOST);
  53                 if (error == 0)
  54                         error = getnameinfo(res->ai_addr, res->ai_addrlen,
  55                                             namebuf, sizeof(namebuf),
  56                                             servbuf, sizeof(servbuf), 0);
  57                 if (error != 0) {
  58                         fprintf(stderr, "getnameinfo failed: %s\n",
  59                                 gai_strerror(error));
  60                 } else {
  61                         printf("%s(%s/%s)=%s:%s\n", hostname,
  62                                res->ai_canonname, addrbuf, namebuf, servbuf);
  63                 }
  64         }
  65
  66         freeaddrinfo(res);
  67 }
  68
  69 int
  70 main(int argc, char *argv[]) {
  71         if (argc < 2)
  72                 exit(1);
  73
  74         do_gai(AF_INET, argv[1]);
  75         do_gai(AF_INET6, argv[1]);
  76         do_gai(AF_UNSPEC, argv[1]);
  77
  78         exit(0);
  79 }