init.c revision 1.2 
1/*	$NetBSD: init.c,v 1.2 2020/08/11 13:15:41 christos Exp $	*/
2
3/* init.c - initialize relay backend */
4/* $OpenLDAP$ */
5/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
6 *
7 * Copyright 2004-2020 The OpenLDAP Foundation.
8 * Portions Copyright 2004 Pierangelo Masarati.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted only as authorized by the OpenLDAP
13 * Public License.
14 *
15 * A copy of this license is available in the file LICENSE in the
16 * top-level directory of the distribution or, alternatively, at
17 * <http://www.OpenLDAP.org/license.html>.
18 */
19/* ACKNOWLEDGEMENTS:
20 * This work was initially developed by Pierangelo Masarati for inclusion
21 * in OpenLDAP Software.
22 */
23
24#include <sys/cdefs.h>
25__RCSID("$NetBSD: init.c,v 1.2 2020/08/11 13:15:41 christos Exp $");
26
27#include "portable.h"
28
29#include <stdio.h>
30#include <ac/string.h>
31
32#include "slap.h"
33#include "config.h"
34#include "back-relay.h"
35
36static ConfigDriver relay_back_cf;
37
38static ConfigTable relaycfg[] = {
39	{ "relay", "relay", 2, 2, 0,
40		ARG_MAGIC|ARG_DN|ARG_QUOTE,
41		relay_back_cf, "( OLcfgDbAt:5.1 "
42			"NAME 'olcRelay' "
43			"DESC 'Relay DN' "
44			"SYNTAX OMsDN "
45			"SINGLE-VALUE )",
46		NULL, NULL },
47	{ NULL }
48};
49
50static ConfigOCs relayocs[] = {
51	{ "( OLcfgDbOc:5.1 "
52		"NAME 'olcRelayConfig' "
53		"DESC 'Relay backend configuration' "
54		"SUP olcDatabaseConfig "
55		"MAY ( olcRelay "
56		") )",
57		 	Cft_Database, relaycfg},
58	{ NULL, 0, NULL }
59};
60
61static int
62relay_back_cf( ConfigArgs *c )
63{
64	relay_back_info	*ri = ( relay_back_info * )c->be->be_private;
65	int		rc = 0;
66
67	if ( c->op == SLAP_CONFIG_EMIT ) {
68		if ( ri != NULL && !BER_BVISNULL( &ri->ri_realsuffix ) ) {
69			value_add_one( &c->rvalue_vals, &ri->ri_realsuffix );
70			return 0;
71		}
72		return 1;
73
74	} else if ( c->op == LDAP_MOD_DELETE ) {
75		if ( !BER_BVISNULL( &ri->ri_realsuffix ) ) {
76			ch_free( ri->ri_realsuffix.bv_val );
77			BER_BVZERO( &ri->ri_realsuffix );
78			ri->ri_bd = NULL;
79			return 0;
80		}
81		return 1;
82
83	} else {
84		BackendDB *bd;
85
86		assert( ri != NULL );
87		assert( BER_BVISNULL( &ri->ri_realsuffix ) );
88
89		if ( c->be->be_nsuffix == NULL ) {
90			snprintf( c->cr_msg, sizeof( c->cr_msg),
91				"\"relay\" directive "
92				"must appear after \"suffix\"" );
93			Log2( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
94				"%s: %s.\n", c->log, c->cr_msg );
95			rc = 1;
96			goto relay_done;
97		}
98
99		if ( !BER_BVISNULL( &c->be->be_nsuffix[ 1 ] ) ) {
100			snprintf( c->cr_msg, sizeof( c->cr_msg),
101				"relaying of multiple suffix "
102				"database not supported" );
103			Log2( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
104				"%s: %s.\n", c->log, c->cr_msg );
105			rc = 1;
106			goto relay_done;
107		}
108
109		bd = select_backend( &c->value_ndn, 1 );
110		if ( bd == NULL ) {
111			snprintf( c->cr_msg, sizeof( c->cr_msg),
112				"cannot find database "
113				"of relay dn \"%s\" "
114				"in \"olcRelay <dn>\"\n",
115				c->value_dn.bv_val );
116			Log2( LDAP_DEBUG_CONFIG, LDAP_LEVEL_ERR,
117				"%s: %s.\n", c->log, c->cr_msg );
118
119		} else if ( bd->be_private == c->be->be_private ) {
120			snprintf( c->cr_msg, sizeof( c->cr_msg),
121				"relay dn \"%s\" would call self "
122				"in \"relay <dn>\" line\n",
123				c->value_dn.bv_val );
124			Log2( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
125				"%s: %s.\n", c->log, c->cr_msg );
126			rc = 1;
127			goto relay_done;
128		}
129
130		ri->ri_realsuffix = c->value_ndn;
131		BER_BVZERO( &c->value_ndn );
132
133relay_done:;
134		ch_free( c->value_dn.bv_val );
135		ch_free( c->value_ndn.bv_val );
136	}
137
138	return rc;
139}
140
141int
142relay_back_initialize( BackendInfo *bi )
143{
144	bi->bi_init = 0;
145	bi->bi_open = 0;
146	bi->bi_config = 0;
147	bi->bi_close = 0;
148	bi->bi_destroy = 0;
149
150	bi->bi_db_init = relay_back_db_init;
151	bi->bi_db_config = config_generic_wrapper;
152	bi->bi_db_open = relay_back_db_open;
153#if 0
154	bi->bi_db_close = relay_back_db_close;
155#endif
156	bi->bi_db_destroy = relay_back_db_destroy;
157
158	bi->bi_op_bind = relay_back_op_bind;
159	bi->bi_op_search = relay_back_op_search;
160	bi->bi_op_compare = relay_back_op_compare;
161	bi->bi_op_modify = relay_back_op_modify;
162	bi->bi_op_modrdn = relay_back_op_modrdn;
163	bi->bi_op_add = relay_back_op_add;
164	bi->bi_op_delete = relay_back_op_delete;
165	bi->bi_extended = relay_back_op_extended;
166	bi->bi_entry_release_rw = relay_back_entry_release_rw;
167	bi->bi_entry_get_rw = relay_back_entry_get_rw;
168	bi->bi_operational = relay_back_operational;
169	bi->bi_has_subordinates = relay_back_has_subordinates;
170
171	bi->bi_cf_ocs = relayocs;
172
173	return config_register_schema( relaycfg, relayocs );
174}
175
176int
177relay_back_db_init( Backend *be, ConfigReply *cr)
178{
179	relay_back_info		*ri;
180
181	be->be_private = NULL;
182
183	ri = (relay_back_info *) ch_calloc( 1, RELAY_INFO_SIZE );
184	if ( ri == NULL ) {
185 		return -1;
186 	}
187
188	ri->ri_bd = NULL;
189	BER_BVZERO( &ri->ri_realsuffix );
190	ri->ri_massage = 0;
191
192	be->be_cf_ocs = be->bd_info->bi_cf_ocs;
193
194	be->be_private = (void *)ri;
195
196	return 0;
197}
198
199int
200relay_back_db_open( Backend *be, ConfigReply *cr )
201{
202	relay_back_info		*ri = (relay_back_info *)be->be_private;
203
204	assert( ri != NULL );
205
206	if ( !BER_BVISNULL( &ri->ri_realsuffix ) ) {
207		ri->ri_bd = select_backend( &ri->ri_realsuffix, 1 );
208
209		/* must be there: it was during config! */
210		if ( ri->ri_bd == NULL ) {
211			snprintf( cr->msg, sizeof( cr->msg),
212				"cannot find database "
213				"of relay dn \"%s\" "
214				"in \"olcRelay <dn>\"\n",
215				ri->ri_realsuffix.bv_val );
216			Log1( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
217				"relay_back_db_open: %s.\n", cr->msg );
218
219			return 1;
220		}
221
222		/* inherit controls */
223		AC_MEMCPY( be->bd_self->be_ctrls, ri->ri_bd->be_ctrls, sizeof( be->be_ctrls ) );
224
225	} else {
226		/* inherit all? */
227		AC_MEMCPY( be->bd_self->be_ctrls, frontendDB->be_ctrls, sizeof( be->be_ctrls ) );
228	}
229
230	return 0;
231}
232
233int
234relay_back_db_close( Backend *be, ConfigReply *cr )
235{
236	return 0;
237}
238
239int
240relay_back_db_destroy( Backend *be, ConfigReply *cr)
241{
242	relay_back_info		*ri = (relay_back_info *)be->be_private;
243
244	if ( ri ) {
245		if ( !BER_BVISNULL( &ri->ri_realsuffix ) ) {
246			ch_free( ri->ri_realsuffix.bv_val );
247		}
248		ch_free( ri );
249	}
250
251	return 0;
252}
253
254#if SLAPD_RELAY == SLAPD_MOD_DYNAMIC
255
256/* conditionally define the init_module() function */
257SLAP_BACKEND_INIT_MODULE( relay )
258
259#endif /* SLAPD_RELAY == SLAPD_MOD_DYNAMIC */
260