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 #include "mdns_common.h"
28
29 /*
30 * gethostby* functions for the hosts database. The hosts
31 * database stores IPv4 addresses only.
32 * mDNS query functions to perform the host lookup
33 * are in mdns/common/mdns_common.c file.
34 * _nss_mdns_hosts_constr is called to initialize
35 * the nsswitch backend data structures.
36 */
37
38 static nss_status_t
getbyname(be,a)39 getbyname(be, a)
40 mdns_backend_ptr_t be;
41 void *a;
42 {
43 struct mdns_querydata qdata;
44 char *hname;
45
46 (void) memset(&qdata, 0, sizeof (struct mdns_querydata));
47
48 qdata.argp = (nss_XbyY_args_t *)a;
49 hname = (char *)qdata.argp->key.name;
50
51 _nss_mdns_updatecfg(be);
52 return (_nss_mdns_querybyname(be, hname, AF_INET, &qdata));
53 }
54
55 /*ARGSUSED*/
56 static nss_status_t
getbyaddr(be,a)57 getbyaddr(be, a)
58 mdns_backend_ptr_t be;
59 void *a;
60 {
61 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
62 struct in_addr addr;
63 struct mdns_querydata qdata;
64 char buffer[sizeof ("255.255.255.255.in-addr.arpa.")];
65 uint8_t *p;
66
67 (void) memset(&qdata, 0, sizeof (struct mdns_querydata));
68 qdata.argp = argp;
69
70 argp->h_errno = 0;
71 if ((argp->key.hostaddr.type != AF_INET) ||
72 (argp->key.hostaddr.len != sizeof (addr)))
73 return (NSS_NOTFOUND);
74
75 (void) memcpy(&addr, argp->key.hostaddr.addr, sizeof (addr));
76
77 if (inet_ntop(AF_INET, (void *) &addr.s_addr,
78 (void *)qdata.paddrbuf,
79 sizeof (qdata.paddrbuf)) == NULL)
80 return (NSS_NOTFOUND);
81
82 qdata.af = AF_INET;
83 p = (uint8_t *)&addr.s_addr;
84 (void) snprintf(buffer, sizeof (buffer),
85 "%u.%u.%u.%u.in-addr.arpa.", p[3], p[2], p[1], p[0]);
86
87 _nss_mdns_updatecfg(be);
88 return (_nss_mdns_querybyaddr(be, buffer, qdata.af, &qdata));
89 }
90
91 /*ARGSUSED*/
92 static nss_status_t
_nss_mdns_getent(be,args)93 _nss_mdns_getent(be, args)
94 mdns_backend_ptr_t be;
95 void *args;
96 {
97 return (NSS_UNAVAIL);
98 }
99
100 /*ARGSUSED*/
101 static nss_status_t
_nss_mdns_setent(be,dummy)102 _nss_mdns_setent(be, dummy)
103 mdns_backend_ptr_t be;
104 void *dummy;
105 {
106 return (NSS_UNAVAIL);
107 }
108
109 /*ARGSUSED*/
110 static nss_status_t
_nss_mdns_endent(be,dummy)111 _nss_mdns_endent(be, dummy)
112 mdns_backend_ptr_t be;
113 void *dummy;
114 {
115 return (NSS_UNAVAIL);
116 }
117
118 /*ARGSUSED*/
119 static nss_status_t
_nss_mdns_hosts_destr(be,dummy)120 _nss_mdns_hosts_destr(be, dummy)
121 mdns_backend_ptr_t be;
122 void *dummy;
123 {
124 _nss_mdns_destr(be);
125 return (NSS_SUCCESS);
126 }
127
128 static mdns_backend_op_t host_ops[] = {
129 _nss_mdns_hosts_destr,
130 _nss_mdns_endent,
131 _nss_mdns_setent,
132 _nss_mdns_getent,
133 getbyname,
134 getbyaddr,
135 };
136
137 /*ARGSUSED*/
138 nss_backend_t *
_nss_mdns_hosts_constr(dummy1,dummy2,dummy3)139 _nss_mdns_hosts_constr(dummy1, dummy2, dummy3)
140 const char *dummy1, *dummy2, *dummy3;
141 {
142 return (_nss_mdns_constr(host_ops,
143 sizeof (host_ops) / sizeof (host_ops[0])));
144 }
145
146 /*ARGSUSED*/
147 nss_status_t
_nss_get_mdns_hosts_name(mdns_backend_ptr_t * be,void ** bufp,size_t * sizep)148 _nss_get_mdns_hosts_name(mdns_backend_ptr_t *be, void **bufp, size_t *sizep)
149 {
150 return (_nss_mdns_gethost_withttl(*bufp, *sizep, 0));
151 }
152