1/*	$NetBSD: sample-gai.c,v 1.2.6.1 2012/06/05 21:15:36 bouyer Exp $	*/
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
32static void
33do_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
69int
70main(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}
80