/contrib/bind9/lib/export/samples/sample-gai.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 77 lines · 49 code · 12 blank · 16 comment · 8 complexity · 2c04a6943debc763eca299838b023d18 MD5 · raw file
- /*
- * Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
- /* $Id: sample-gai.c,v 1.4 2009/09/02 23:48:02 tbox Exp $ */
- #include <config.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <irs/netdb.h>
- #include <stdlib.h>
- #include <string.h>
- #include <stdio.h>
- static void
- do_gai(int family, char *hostname) {
- struct addrinfo hints, *res, *res0;
- int error;
- char namebuf[1024], addrbuf[1024], servbuf[1024];
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = family;
- hints.ai_socktype = SOCK_STREAM;
- hints.ai_flags = AI_CANONNAME;
- error = getaddrinfo(hostname, "http", &hints, &res0);
- if (error) {
- fprintf(stderr, "getaddrinfo failed for %s,family=%d: %s\n",
- hostname, family, gai_strerror(error));
- return;
- }
- for (res = res0; res; res = res->ai_next) {
- error = getnameinfo(res->ai_addr, res->ai_addrlen,
- addrbuf, sizeof(addrbuf),
- NULL, 0, NI_NUMERICHOST);
- if (error == 0)
- error = getnameinfo(res->ai_addr, res->ai_addrlen,
- namebuf, sizeof(namebuf),
- servbuf, sizeof(servbuf), 0);
- if (error != 0) {
- fprintf(stderr, "getnameinfo failed: %s\n",
- gai_strerror(error));
- } else {
- printf("%s(%s/%s)=%s:%s\n", hostname,
- res->ai_canonname, addrbuf, namebuf, servbuf);
- }
- }
- freeaddrinfo(res);
- }
- int
- main(int argc, char *argv[]) {
- if (argc < 2)
- exit(1);
- do_gai(AF_INET, argv[1]);
- do_gai(AF_INET6, argv[1]);
- do_gai(AF_UNSPEC, argv[1]);
- exit(0);
- }