getether.c revision 2830:5228d1267a01 
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 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27
28#include <sys/types.h>
29#include <sys/socket.h>
30#include <net/if.h>
31#include <netinet/in.h>
32#include <net/if_arp.h>
33#include <netinet/if_ether.h>
34#include "ldap_common.h"
35
36/* ether attributes filters */
37#define	_E_HOSTNAME		"cn"
38#define	_E_MACADDRESS		"macaddress"
39#define	_F_GETETHERBYHOST	"(&(objectClass=ieee802Device)(cn=%s))"
40#define	_F_GETETHERBYHOST_SSD	"(&(%%s)(cn=%s))"
41#define	_F_GETETHERBYETHER	"(&(objectClass=ieee802Device)(macAddress=%s))"
42#define	_F_GETETHERBYETHER_SSD	"(&(%%s)(macAddress=%s))"
43
44static const char *ethers_attrs[] = {
45	_E_HOSTNAME,
46	_E_MACADDRESS,
47	(char *)NULL
48};
49
50/*
51 * _nss_ldap_ethers2str is the data marshaling method for the ethers
52 * ether_hostton/ether_ntohost backend processes.
53 * This method is called after a successful ldap search has been performed.
54 * This method will parse the ldap search values into the file format.
55 * e.g.
56 *
57 * 8:0:20:8e:eb:8a8 borealis
58 *
59 * The front end marshaller str2ether uses argp->buf.result for a different
60 * purpose so a flag be->db_type is set to work around this oddity.
61 *
62 */
63/*ARGSUSED0*/
64static int
65_nss_ldap_ethers2str(ldap_backend_ptr be, nss_XbyY_args_t *argp)
66{
67	int			nss_result;
68	ns_ldap_result_t	*result = be->result;
69	char			**host, **macaddress;
70
71	if (result == NULL)
72		return (NSS_STR_PARSE_PARSE);
73	nss_result = NSS_STR_PARSE_SUCCESS;
74
75	host = __ns_ldap_getAttr(result->entry, _E_HOSTNAME);
76	if (host == NULL || host[0] == NULL || (strlen(host[0]) < 1)) {
77			nss_result = NSS_STR_PARSE_PARSE;
78			goto result_ea2str;
79	}
80	macaddress = __ns_ldap_getAttr(result->entry, _E_MACADDRESS);
81	if (macaddress == NULL || macaddress[0] == NULL ||
82				(strlen(macaddress[0]) < 1)) {
83			nss_result = NSS_STR_PARSE_PARSE;
84			goto result_ea2str;
85	}
86	be->buflen = strlen(host[0]) + strlen(macaddress[0]) + 1; /* ' ' */
87	/* Add a trailing null for easy debug */
88	be->buffer = calloc(1, be->buflen + 1);
89	if (be->buffer == NULL) {
90		nss_result = NSS_STR_PARSE_PARSE;
91		goto result_ea2str;
92	}
93
94	(void) snprintf(be->buffer, be->buflen + 1, "%s %s",
95			macaddress[0], host[0]);
96	be->db_type = NSS_LDAP_DB_ETHERS;
97
98result_ea2str:
99
100	(void) __ns_ldap_freeResult(&be->result);
101	return (nss_result);
102}
103
104/*
105 * getbyhost gets an ethernet address by hostname. This function
106 * constructs an ldap search filter using the hostname invocation
107 * parameter and the getetherbyhost search filter defined. Once
108 * the filter is constructed, we search for a matching entry and
109 * marshal the data results into uchar_t *ether for the frontend
110 * process. The function _nss_ldap_ethers2ent performs the data
111 * marshaling.
112 *
113 * RFC 2307, An Approach for Using LDAP as a Network Information Service,
114 * indicates that dn's be fully qualified. Host name searches will be on
115 * fully qualified host names (e.g., foo.bar.sun.com).
116 */
117
118static nss_status_t
119getbyhost(ldap_backend_ptr be, void *a)
120{
121	char		hostname[3 * MAXHOSTNAMELEN];
122	nss_XbyY_args_t	*argp = (nss_XbyY_args_t *)a;
123	char		searchfilter[SEARCHFILTERLEN];
124	char		userdata[SEARCHFILTERLEN];
125	int		ret;
126	nss_status_t	rc;
127
128	if (_ldap_filter_name(hostname, argp->key.name, sizeof (hostname)) != 0)
129		return ((nss_status_t)NSS_NOTFOUND);
130
131	ret = snprintf(searchfilter, sizeof (searchfilter),
132	    _F_GETETHERBYHOST, hostname);
133
134	if (ret >= sizeof (searchfilter) || ret < 0)
135		return ((nss_status_t)NSS_NOTFOUND);
136
137	ret = snprintf(userdata, sizeof (userdata),
138	    _F_GETETHERBYHOST_SSD, hostname);
139
140	if (ret >= sizeof (userdata) || ret < 0)
141		return ((nss_status_t)NSS_NOTFOUND);
142
143	rc = (nss_status_t)_nss_ldap_lookup(be, argp,
144		_ETHERS, searchfilter, NULL,
145		_merge_SSD_filter, userdata);
146
147	return (rc);
148}
149
150
151/*
152 * getbyether gets an ethernet address by ethernet address. This
153 * function constructs an ldap search filter using the ASCII
154 * ethernet address invocation parameter and the getetherbyether
155 * search filter defined. Once the filter is constructed, we
156 * search for a matching entry and  marshal the data results into
157 * uchar_t *ether for the frontend process. The function
158 * _nss_ldap_ethers2ent performs the data marshaling.
159 */
160
161static nss_status_t
162getbyether(ldap_backend_ptr be, void *a)
163{
164	nss_XbyY_args_t	*argp = (nss_XbyY_args_t *)a;
165	char		etherstr[18];
166	uchar_t	*e = argp->key.ether;
167	char		searchfilter[SEARCHFILTERLEN];
168	char		userdata[SEARCHFILTERLEN];
169	int		ret;
170
171	ret = snprintf(etherstr, sizeof (etherstr), "%x:%x:%x:%x:%x:%x",
172	    *e, *(e + 1), *(e + 2), *(e + 3), *(e + 4), *(e + 5));
173	if (ret >= sizeof (etherstr) || ret < 0)
174		return ((nss_status_t)NSS_NOTFOUND);
175
176	ret = snprintf(searchfilter, sizeof (searchfilter),
177	    _F_GETETHERBYETHER, etherstr);
178	if (ret >= sizeof (searchfilter) || ret < 0)
179		return ((nss_status_t)NSS_NOTFOUND);
180
181	ret = snprintf(userdata, sizeof (userdata),
182	    _F_GETETHERBYETHER_SSD, etherstr);
183	if (ret >= sizeof (userdata) || ret < 0)
184		return ((nss_status_t)NSS_NOTFOUND);
185
186	return ((nss_status_t)_nss_ldap_lookup(be, argp,
187		_ETHERS, searchfilter, NULL,
188		_merge_SSD_filter, userdata));
189}
190
191
192static ldap_backend_op_t ethers_ops[] = {
193	_nss_ldap_destr,
194	getbyhost,
195	getbyether
196};
197
198
199/*
200 * _nss_ldap_ethers_constr is where life begins. This function calls the
201 * generic ldap constructor function to define and build the abstract
202 * data types required to support ldap operations.
203 */
204
205/*ARGSUSED0*/
206nss_backend_t *
207_nss_ldap_ethers_constr(const char *dummy1, const char *dummy2,
208			const char *dummy3)
209{
210
211	return ((nss_backend_t *)_nss_ldap_constr(ethers_ops,
212		sizeof (ethers_ops)/sizeof (ethers_ops[0]), _ETHERS,
213		ethers_attrs, _nss_ldap_ethers2str));
214}
215