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
40 static nss_status_t
getbyname(be,a)41 getbyname(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*/
58 static nss_status_t
getbyaddr(be,a)59 getbyaddr(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*/
94 static nss_status_t
_nss_mdns_getent(be,args)95 _nss_mdns_getent(be, args)
96 mdns_backend_ptr_t be;
97 void *args;
98 {
99 return (NSS_UNAVAIL);
100 }
101
102 /*ARGSUSED*/
103 static nss_status_t
_nss_mdns_setent(be,dummy)104 _nss_mdns_setent(be, dummy)
105 mdns_backend_ptr_t be;
106 void *dummy;
107 {
108 return (NSS_UNAVAIL);
109 }
110
111 /*ARGSUSED*/
112 static nss_status_t
_nss_mdns_endent(be,dummy)113 _nss_mdns_endent(be, dummy)
114 mdns_backend_ptr_t be;
115 void *dummy;
116 {
117 return (NSS_UNAVAIL);
118 }
119
120 /*ARGSUSED*/
121 static nss_status_t
_nss_mdns_hosts_destr(be,dummy)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
130 static 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*/
140 nss_backend_t *
_nss_mdns_hosts_constr(dummy1,dummy2,dummy3)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*/
149 nss_status_t
_nss_get_mdns_hosts_name(mdns_backend_ptr_t * be,void ** bufp,size_t * sizep)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