getnetnamadr.c revision 92986 
1/*-
2 * Copyright (c) 1994, Garrett Wollman
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/lib/libc/net/getnetnamadr.c 92986 2002-03-22 21:53:29Z obrien $");
28
29#include <sys/param.h>
30#include <sys/socket.h>
31#include <netinet/in.h>
32#include <arpa/inet.h>
33#include <netdb.h>
34#include <stdio.h>
35#include <ctype.h>
36#include <string.h>
37#include <stdarg.h>
38#include <nsswitch.h>
39
40extern int _ht_getnetbyname(void *, void *, va_list);
41extern int _dns_getnetbyname(void *, void *, va_list);
42extern int _nis_getnetbyname(void *, void *, va_list);
43extern int _ht_getnetbyaddr(void *, void *, va_list);
44extern int _dns_getnetbyaddr(void *, void *, va_list);
45extern int _nis_getnetbyaddr(void *, void *, va_list);
46
47/* Network lookup order if nsswitch.conf is broken or nonexistant */
48static const ns_src default_src[] = {
49	{ NSSRC_FILES, NS_SUCCESS },
50	{ NSSRC_DNS, NS_SUCCESS },
51	{ 0 }
52};
53
54struct netent *
55getnetbyname(const char *name)
56{
57	struct netent *hp = 0;
58	int rval;
59
60
61	static const ns_dtab dtab[] = {
62		NS_FILES_CB(_ht_getnetbyname, NULL)
63		{ NSSRC_DNS, _dns_getnetbyname, NULL },
64		NS_NIS_CB(_nis_getnetbyname, NULL) /* force -DHESIOD */
65		{ 0 }
66	};
67
68	rval = nsdispatch((void *)&hp, dtab, NSDB_NETWORKS, "getnetbyname",
69			  default_src, name);
70
71	if (rval != NS_SUCCESS)
72		return NULL;
73	else
74		return hp;
75}
76
77struct netent *
78getnetbyaddr(u_long addr, int af)
79{
80	struct netent *hp = 0;
81	int rval;
82
83	static const ns_dtab dtab[] = {
84		NS_FILES_CB(_ht_getnetbyaddr, NULL)
85		{ NSSRC_DNS, _dns_getnetbyaddr, NULL },
86		NS_NIS_CB(_nis_getnetbyaddr, NULL) /* force -DHESIOD */
87		{ 0 }
88	};
89
90	rval = nsdispatch((void *)&hp, dtab, NSDB_NETWORKS, "getnetbyaddr",
91			  default_src, addr, af);
92
93	if (rval != NS_SUCCESS)
94		return NULL;
95	else
96		return hp;
97}
98
99void
100setnetent(stayopen)
101	int stayopen;
102{
103	_setnethtent(stayopen);
104	_setnetdnsent(stayopen);
105}
106
107void
108endnetent()
109{
110	_endnethtent();
111	_endnetdnsent();
112}
113