gethostent6.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 ipnodes database. The ipnodes
33 * database stores both IPv4 and IPv6 address information.
34 * mDNS query functions to perform the host lookup are
35 * in mdns/common/mdns_common.c file.
36 * _nss_mdns_ipnodes_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	nss_XbyY_args_t 	*argp = (nss_XbyY_args_t *)a;
46	int			af = argp->key.ipnode.af_family;
47	char			*hname = (char *)argp->key.ipnode.name;
48	struct mdns_querydata   qdata;
49
50	(void) memset(&qdata, 0, sizeof (struct mdns_querydata));
51	qdata.argp = argp;
52
53	_nss_mdns_updatecfg(be);
54	return (_nss_mdns_querybyname(be, hname, af, &qdata));
55}
56
57static nss_status_t
58getbyaddr(be, a)
59	mdns_backend_ptr_t	be;
60	void			*a;
61{
62	int i;
63	char ch;
64	char *chptr;
65	uint8_t *p;
66	struct in6_addr *addr;
67	struct mdns_querydata qdata;
68	char addrqryname[ sizeof ("f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f") + \
69		sizeof (".f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.ip6.arpa.")];
70	nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
71
72	(void) memset(&qdata, 0, sizeof (struct mdns_querydata));
73	qdata.argp = argp;
74	argp->h_errno = 0;
75
76	if ((argp->key.hostaddr.type != AF_INET6) ||
77	    (argp->key.hostaddr.len != sizeof (*addr)))
78		return (NSS_NOTFOUND);
79
80	/* LINTED E_BAD_PTR_CAST_ALIGN */
81	addr = (struct in6_addr *)(argp->key.hostaddr.addr);
82
83	if (IN6_IS_ADDR_V4MAPPED(addr)) {
84		struct in_addr ipv4addr;
85
86		IN6_V4MAPPED_TO_INADDR(addr, &ipv4addr);
87		if (inet_ntop(AF_INET, (void *) &ipv4addr.s_addr,
88		(void *)qdata.paddrbuf, sizeof (qdata.paddrbuf)) == NULL)
89				return (NSS_NOTFOUND);
90		qdata.af = AF_INET;
91		p = (uint8_t *)&ipv4addr.s_addr;
92		(void) snprintf(addrqryname, sizeof (addrqryname),
93			"%u.%u.%u.%u.in-addr.arpa.", p[3], p[2], p[1], p[0]);
94	} else {
95		if (inet_ntop(AF_INET6, (void *)addr,
96			(void *)qdata.paddrbuf,
97			sizeof (qdata.paddrbuf)) == NULL)
98			return (NSS_NOTFOUND);
99		qdata.af = AF_INET6;
100		chptr = addrqryname;
101		for (i = 0; i < 16; i++)
102		{
103			ch = ((char *)addr)[15-i];
104			chptr += snprintf(chptr, sizeof (addrqryname)-i*4,
105					"%X.%X.", ch&0x0f, (ch>>4)&0x0f);
106		}
107		(void) strlcpy(chptr, "ip6.arpa.", sizeof (addrqryname)-64);
108	}
109
110	_nss_mdns_updatecfg(be);
111	return (_nss_mdns_querybyaddr(be, addrqryname, qdata.af, &qdata));
112}
113
114/*ARGSUSED*/
115static nss_status_t
116_nss_mdns_getent(be, args)
117	mdns_backend_ptr_t	be;
118	void			*args;
119{
120	return (NSS_UNAVAIL);
121}
122
123/*ARGSUSED*/
124static nss_status_t
125_nss_mdns_setent(be, dummy)
126	mdns_backend_ptr_t	be;
127	void			*dummy;
128{
129	return (NSS_UNAVAIL);
130}
131
132/*ARGSUSED*/
133static nss_status_t
134_nss_mdns_endent(be, dummy)
135	mdns_backend_ptr_t	be;
136	void			*dummy;
137{
138	return (NSS_UNAVAIL);
139}
140
141/*ARGSUSED*/
142static nss_status_t
143_nss_mdns_ipnodes_destr(be, dummy)
144	mdns_backend_ptr_t	be;
145	void			*dummy;
146{
147	_nss_mdns_destr(be);
148	return (NSS_SUCCESS);
149}
150
151static mdns_backend_op_t ipnodes_ops[] = {
152	_nss_mdns_ipnodes_destr,
153	_nss_mdns_endent,
154	_nss_mdns_setent,
155	_nss_mdns_getent,
156	getbyname,
157	getbyaddr,
158};
159
160/*ARGSUSED*/
161nss_backend_t *
162_nss_mdns_ipnodes_constr(dummy1, dummy2, dummy3)
163	const char	*dummy1, *dummy2, *dummy3;
164{
165	return (_nss_mdns_constr(ipnodes_ops,
166		sizeof (ipnodes_ops) / sizeof (ipnodes_ops[0])));
167}
168
169/*ARGSUSED*/
170nss_status_t
171_nss_get_mdns_ipnodes_name(mdns_backend_ptr_t *be, void **bufp, size_t *sizep)
172{
173	return (_nss_mdns_gethost_withttl(*bufp, *sizep, 1));
174}
175