gethostent.c revision 4904:cd464a980538
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include "mdns_common.h"
30
31/*
32 * gethostby* functions for the hosts database. The hosts
33 * database stores IPv4 addresses only.
34 * mDNS query functions to perform the host lookup
35 * are in mdns/common/mdns_common.c file.
36 * _nss_mdns_hosts_constr is called to initialize
37 * the nsswitch backend data structures.
38 */
39
40static nss_status_t
41getbyname(be, a)
42	mdns_backend_ptr_t	be;
43	void			*a;
44{
45	struct mdns_querydata   qdata;
46	char			*hname;
47
48	(void) memset(&qdata, 0, sizeof (struct mdns_querydata));
49
50	qdata.argp = (nss_XbyY_args_t *)a;
51	hname = (char *)qdata.argp->key.name;
52
53	_nss_mdns_updatecfg(be);
54	return (_nss_mdns_querybyname(be, hname, AF_INET, &qdata));
55}
56
57/*ARGSUSED*/
58static nss_status_t
59getbyaddr(be, a)
60	mdns_backend_ptr_t	be;
61	void			*a;
62{
63	nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
64	struct in_addr addr;
65	struct mdns_querydata  qdata;
66	char buffer[sizeof ("255.255.255.255.in-addr.arpa.")];
67	uint8_t *p;
68
69	(void) memset(&qdata, 0, sizeof (struct mdns_querydata));
70	qdata.argp = argp;
71
72	argp->h_errno = 0;
73	if ((argp->key.hostaddr.type != AF_INET) ||
74	    (argp->key.hostaddr.len != sizeof (addr)))
75		return (NSS_NOTFOUND);
76
77	(void) memcpy(&addr, argp->key.hostaddr.addr, sizeof (addr));
78
79	if (inet_ntop(AF_INET, (void *) &addr.s_addr,
80		(void *)qdata.paddrbuf,
81		sizeof (qdata.paddrbuf)) == NULL)
82			return (NSS_NOTFOUND);
83
84	qdata.af = AF_INET;
85	p = (uint8_t *)&addr.s_addr;
86	(void) snprintf(buffer, sizeof (buffer),
87		"%u.%u.%u.%u.in-addr.arpa.", p[3], p[2], p[1], p[0]);
88
89	_nss_mdns_updatecfg(be);
90	return (_nss_mdns_querybyaddr(be, buffer, qdata.af, &qdata));
91}
92
93/*ARGSUSED*/
94static nss_status_t
95_nss_mdns_getent(be, args)
96	mdns_backend_ptr_t	be;
97	void			*args;
98{
99	return (NSS_UNAVAIL);
100}
101
102/*ARGSUSED*/
103static nss_status_t
104_nss_mdns_setent(be, dummy)
105	mdns_backend_ptr_t	be;
106	void			*dummy;
107{
108	return (NSS_UNAVAIL);
109}
110
111/*ARGSUSED*/
112static nss_status_t
113_nss_mdns_endent(be, dummy)
114	mdns_backend_ptr_t	be;
115	void			*dummy;
116{
117	return (NSS_UNAVAIL);
118}
119
120/*ARGSUSED*/
121static nss_status_t
122_nss_mdns_hosts_destr(be, dummy)
123	mdns_backend_ptr_t	be;
124	void			*dummy;
125{
126	_nss_mdns_destr(be);
127	return (NSS_SUCCESS);
128}
129
130static mdns_backend_op_t host_ops[] = {
131	_nss_mdns_hosts_destr,
132	_nss_mdns_endent,
133	_nss_mdns_setent,
134	_nss_mdns_getent,
135	getbyname,
136	getbyaddr,
137};
138
139/*ARGSUSED*/
140nss_backend_t *
141_nss_mdns_hosts_constr(dummy1, dummy2, dummy3)
142	const char	*dummy1, *dummy2, *dummy3;
143{
144	return (_nss_mdns_constr(host_ops,
145		sizeof (host_ops) / sizeof (host_ops[0])));
146}
147
148/*ARGSUSED*/
149nss_status_t
150_nss_get_mdns_hosts_name(mdns_backend_ptr_t *be, void **bufp, size_t *sizep)
151{
152	return (_nss_mdns_gethost_withttl(*bufp, *sizep, 0));
153}
154