mirror of
https://gitlab.isc.org/isc-projects/bind9
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78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
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* Copyright (C) 2009, 2012 Internet Systems Consortium, Inc. ("ISC")
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: sample-gai.c,v 1.4 2009/09/02 23:48:02 tbox Exp $ */
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#include <config.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <irs/netdb.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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static void
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do_gai(int family, char *hostname) {
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struct addrinfo hints, *res, *res0;
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int error;
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char namebuf[1024], addrbuf[1024], servbuf[1024];
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = family;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_CANONNAME;
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error = getaddrinfo(hostname, "http", &hints, &res0);
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if (error) {
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fprintf(stderr, "getaddrinfo failed for %s,family=%d: %s\n",
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hostname, family, gai_strerror(error));
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return;
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}
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for (res = res0; res; res = res->ai_next) {
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error = getnameinfo(res->ai_addr, res->ai_addrlen,
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addrbuf, sizeof(addrbuf),
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NULL, 0, NI_NUMERICHOST);
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if (error == 0)
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error = getnameinfo(res->ai_addr, res->ai_addrlen,
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namebuf, sizeof(namebuf),
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servbuf, sizeof(servbuf), 0);
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if (error != 0) {
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fprintf(stderr, "getnameinfo failed: %s\n",
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gai_strerror(error));
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} else {
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printf("%s(%s/%s)=%s:%s\n", hostname,
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res->ai_canonname, addrbuf, namebuf, servbuf);
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}
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}
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freeaddrinfo(res0);
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}
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int
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main(int argc, char *argv[]) {
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if (argc < 2)
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exit(1);
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do_gai(AF_INET, argv[1]);
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do_gai(AF_INET6, argv[1]);
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do_gai(AF_UNSPEC, argv[1]);
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exit(0);
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}
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