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