2 * Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
17 /* $Id: sample-gai.c,v 1.4 2009/09/02 23:48:02 tbox Exp $ */
21 #include <sys/types.h>
22 #include <sys/socket.h>
24 #include <irs/netdb.h>
31 do_gai(int family, char *hostname) {
32 struct addrinfo hints, *res, *res0;
34 char namebuf[1024], addrbuf[1024], servbuf[1024];
36 memset(&hints, 0, sizeof(hints));
37 hints.ai_family = family;
38 hints.ai_socktype = SOCK_STREAM;
39 hints.ai_flags = AI_CANONNAME;
40 error = getaddrinfo(hostname, "http", &hints, &res0);
42 fprintf(stderr, "getaddrinfo failed for %s,family=%d: %s\n",
43 hostname, family, gai_strerror(error));
47 for (res = res0; res; res = res->ai_next) {
48 error = getnameinfo(res->ai_addr, res->ai_addrlen,
49 addrbuf, sizeof(addrbuf),
50 NULL, 0, NI_NUMERICHOST);
52 error = getnameinfo(res->ai_addr, res->ai_addrlen,
53 namebuf, sizeof(namebuf),
54 servbuf, sizeof(servbuf), 0);
56 fprintf(stderr, "getnameinfo failed: %s\n",
59 printf("%s(%s/%s)=%s:%s\n", hostname,
60 res->ai_canonname, addrbuf, namebuf, servbuf);
68 main(int argc, char *argv[]) {
72 do_gai(AF_INET, argv[1]);
73 do_gai(AF_INET6, argv[1]);
74 do_gai(AF_UNSPEC, argv[1]);