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 <ctype.h>
29#include <netdb.h>
30#include "ns_internal.h"
31#include "ldap_common.h"
32
33/* protocols attributes filters */
34#define	_P_NAME			"cn"
35#define	_P_PROTO		"ipprotocolnumber"
36#define	_F_GETPROTOBYNAME	"(&(objectClass=ipProtocol)(cn=%s))"
37#define	_F_GETPROTOBYNAME_SSD	"(&(%%s)(cn=%s))"
38#define	_F_GETPROTOBYNUMBER	\
39	"(&(objectClass=ipProtocol)(ipProtocolNumber=%d))"
40#define	_F_GETPROTOBYNUMBER_SSD	\
41	"(&(%%s)(ipProtocolNumber=%d))"
42
43static const char *protocols_attrs[] = {
44	_P_NAME,
45	_P_PROTO,
46	(char *)NULL
47};
48
49typedef struct protocol_alias {
50	char	*protocol;
51	char	*alias;
52} protocol_alias_t;
53
54static const protocol_alias_t ip_aliases[10] = {
55	{ "ip", "IP" },
56	{ "ipip", "IP-IP" },
57	{ "ipcomp", "IPComp" },
58	{ "ipv6", "IPv6" },
59	{ "ipv6-route", "IPv6-Route" },
60	{ "ipv6-frag", "IPv6-Frag" },
61	{ "ipv6-icmp", "IPv6-ICMP" },
62	{ "ipv6-nonxt", "IPv6-NoNxt" },
63	{ "ipv6-opts", "IPv6-Opts" },
64	{ NULL, NULL }
65};
66
67/*
68 * When the data is imported by ldapaddent, it does not save the aliase in the
69 * "cn" that is same as the canonical name but only different in case.
70 * e.g.
71 * icmp		1	ICMP
72 *
73 * is saved as
74 *
75 * dn: cn=icmp, ...
76 * ...
77 * cn: icmp
78 * ...
79 *
80 * So it needs to replicate the canonical name as an alias of upper case.
81 * But some protocol does have different aliases.
82 *
83 * e.g.
84 * dn: cn=ospf, ...
85 * ...
86 * cn: ospf
87 * cn: OSPFIGP
88 * ...
89 *
90 * For many ip* protocols, the aliases are mixed cased. Maybe it's case
91 * insensitive. But this fucntion tries to restore the aliases to the original
92 * form as much as possible. If the alias can't be found in the aliases table,
93 * it assumes the alias is all upper case.
94 *
95 */
96static char *
97get_alias(char *protocol) {
98	int	i;
99	char	*cp;
100
101	if (strncmp(protocol, "ip", 2) == 0) {
102		for (i = 0; ip_aliases[i].protocol != NULL; i++) {
103			if (strcmp(protocol, ip_aliases[i].protocol) == 0)
104				return (ip_aliases[i].alias);
105		}
106		/*
107		 * No aliase in the table. Return an all upper case aliase
108		 */
109		for (cp = protocol; *cp; cp++)
110			*cp = toupper(*cp);
111
112		return (protocol);
113	} else {
114		/* Return an all upper case aliase */
115		for (cp = protocol; *cp; cp++)
116			*cp = toupper(*cp);
117
118		return (protocol);
119	}
120
121}
122/*
123 * _nss_ldap_protocols2str is the data marshaling method for the protocols
124 * getXbyY * (e.g., getbyname(), getbynumber(), getent()) backend processes.
125 * This method is called after a successful ldap search has been performed.
126 * This method will parse the ldap search values into a file format.
127 * e.g.
128 * idrp 45 IDRP
129 * or
130 * ospf 89 OSPFIGP
131 */
132
133static int
134_nss_ldap_protocols2str(ldap_backend_ptr be, nss_XbyY_args_t *argp)
135{
136	uint_t		i;
137	int		nss_result;
138	int		buflen = 0, len;
139	char		*cname = NULL;
140	char		*buffer = NULL, **number, *alias;
141	ns_ldap_result_t	*result = be->result;
142	ns_ldap_attr_t	*names;
143
144	if (result == NULL)
145		return (NSS_STR_PARSE_PARSE);
146
147	buflen = argp->buf.buflen;
148	if (argp->buf.result != NULL) {
149		if ((be->buffer = calloc(1, buflen)) == NULL) {
150			nss_result = NSS_STR_PARSE_PARSE;
151			goto result_pls2str;
152		}
153		buffer = be->buffer;
154	} else
155		buffer = argp->buf.buffer;
156
157	nss_result = NSS_STR_PARSE_SUCCESS;
158	(void) memset(argp->buf.buffer, 0, buflen);
159
160	names = __ns_ldap_getAttrStruct(result->entry, _P_NAME);
161	if (names == NULL || names->attrvalue == NULL) {
162		nss_result = NSS_STR_PARSE_PARSE;
163		goto result_pls2str;
164	}
165	/* Get the canonical name */
166	cname = __s_api_get_canonical_name(result->entry, names, 1);
167	if (cname == NULL || (len = strlen(cname)) < 1) {
168		nss_result = NSS_STR_PARSE_PARSE;
169		goto result_pls2str;
170	}
171	number = __ns_ldap_getAttr(result->entry, _P_PROTO);
172	if (number == NULL || number[0] == NULL ||
173			(len = strlen(number[0])) < 1) {
174		nss_result = NSS_STR_PARSE_PARSE;
175		goto result_pls2str;
176	}
177	len = snprintf(buffer, buflen,  "%s %s", cname, number[0]);
178	TEST_AND_ADJUST(len, buffer, buflen, result_pls2str);
179	/* Append aliases */
180	if (names->value_count == 1) {
181		/* create an aliase from protocol name */
182		alias = get_alias(cname);
183		len = snprintf(buffer, buflen,  " %s", alias);
184		TEST_AND_ADJUST(len, buffer, buflen, result_pls2str);
185
186	} else {
187		for (i = 0; i < names->value_count; i++) {
188			if (names->attrvalue[i] == NULL) {
189				nss_result = NSS_STR_PARSE_PARSE;
190				goto result_pls2str;
191			}
192			/* Skip the canonical name */
193			if (strcasecmp(names->attrvalue[i], cname) != 0) {
194				len = snprintf(buffer, buflen,  " %s",
195						names->attrvalue[i]);
196				TEST_AND_ADJUST(len, buffer, buflen,
197						result_pls2str);
198			}
199		}
200	}
201
202	/* The front end marshaller doesn't need to copy trailing nulls */
203	if (argp->buf.result != NULL)
204		be->buflen = strlen(be->buffer);
205
206result_pls2str:
207
208	(void) __ns_ldap_freeResult(&be->result);
209	return ((int)nss_result);
210}
211
212
213/*
214 * getbyname gets struct protoent values by protocol name. This
215 * function constructs an ldap search filter using the protocol
216 * name invocation parameter and the getprotobyname search filter
217 * defined. Once the filter is constructed, we search for a matching
218 * entry and marshal the data results into *proto = (struct *
219 * protoent *)argp->buf.result. The function _nss_ldap_protocols2ent
220 * performs the data marshaling.
221 */
222
223static nss_status_t
224getbyname(ldap_backend_ptr be, void *a)
225{
226	nss_XbyY_args_t	*argp = (nss_XbyY_args_t *)a;
227	char		searchfilter[SEARCHFILTERLEN];
228	char		userdata[SEARCHFILTERLEN];
229	char		name[SEARCHFILTERLEN];
230	int		ret;
231
232	if (_ldap_filter_name(name, argp->key.name, sizeof (name)) != 0)
233		return ((nss_status_t)NSS_NOTFOUND);
234
235	ret = snprintf(searchfilter, sizeof (searchfilter),
236	    _F_GETPROTOBYNAME, name);
237	if (ret >= sizeof (searchfilter) || ret < 0)
238		return ((nss_status_t)NSS_NOTFOUND);
239
240	ret = snprintf(userdata, sizeof (userdata),
241	    _F_GETPROTOBYNAME_SSD, name);
242	if (ret >= sizeof (userdata) || ret < 0)
243		return ((nss_status_t)NSS_NOTFOUND);
244
245	return ((nss_status_t)_nss_ldap_lookup(be, argp,
246		_PROTOCOLS, searchfilter, NULL,
247		_merge_SSD_filter, userdata));
248}
249
250
251/*
252 * getbynumber gets struct protoent values by protocol number. This
253 * function constructs an ldap search filter using the protocol
254 * name invocation parameter and the getprotobynumber search filter
255 * defined. Once the filter is constructed, we search for a matching
256 * entry and marshal the data results into *proto = (struct *
257 * protoent *)argp->buf.result. The function _nss_ldap_protocols2ent
258 * performs the data marshaling.
259 */
260
261static nss_status_t
262getbynumber(ldap_backend_ptr be, void *a)
263{
264	nss_XbyY_args_t	*argp = (nss_XbyY_args_t *)a;
265	char		searchfilter[SEARCHFILTERLEN];
266	char		userdata[SEARCHFILTERLEN];
267	int		ret;
268
269	ret = snprintf(searchfilter, sizeof (searchfilter),
270	    _F_GETPROTOBYNUMBER, argp->key.number);
271	if (ret >= sizeof (searchfilter) || ret < 0)
272		return ((nss_status_t)NSS_NOTFOUND);
273
274	ret = snprintf(userdata, sizeof (userdata),
275	    _F_GETPROTOBYNUMBER_SSD, argp->key.number);
276	if (ret >= sizeof (userdata) || ret < 0)
277		return ((nss_status_t)NSS_NOTFOUND);
278
279	return ((nss_status_t)_nss_ldap_lookup(be, argp,
280		_PROTOCOLS, searchfilter, NULL,
281		_merge_SSD_filter, userdata));
282}
283
284static ldap_backend_op_t proto_ops[] = {
285	_nss_ldap_destr,
286	_nss_ldap_endent,
287	_nss_ldap_setent,
288	_nss_ldap_getent,
289	getbyname,
290	getbynumber
291};
292
293
294/*
295 * _nss_ldap_protocols_constr is where life begins. This function calls
296 * the generic ldap constructor function to define and build the abstract
297 * data types required to support ldap operations.
298 */
299
300/*ARGSUSED0*/
301nss_backend_t *
302_nss_ldap_protocols_constr(const char *dummy1, const char *dummy2,
303			const char *dummy3)
304{
305
306	return ((nss_backend_t *)_nss_ldap_constr(proto_ops,
307		sizeof (proto_ops)/sizeof (proto_ops[0]), _PROTOCOLS,
308		protocols_attrs, _nss_ldap_protocols2str));
309}
310