null.c revision 1.1 
1/* null.c - the null backend */
2/* $OpenLDAP: pkg/ldap/servers/slapd/back-null/null.c,v 1.18.2.5 2008/02/12 00:58:15 quanah Exp $ */
3/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 *
5 * Copyright 2002-2008 The OpenLDAP Foundation.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16/* ACKNOWLEDGEMENTS:
17 * This work was originally developed by Hallvard Furuseth for inclusion
18 * in OpenLDAP Software.
19 */
20
21#include "portable.h"
22
23#include <stdio.h>
24#include <ac/string.h>
25
26#include "slap.h"
27#include "config.h"
28
29struct null_info {
30	int	ni_bind_allowed;
31	ID	ni_nextid;
32};
33
34
35/* LDAP operations */
36
37static int
38null_back_bind( Operation *op, SlapReply *rs )
39{
40	struct null_info *ni = (struct null_info *) op->o_bd->be_private;
41
42	if ( ni->ni_bind_allowed || be_isroot_pw( op ) ) {
43		/* front end will send result on success (0) */
44		return LDAP_SUCCESS;
45	}
46
47	rs->sr_err = LDAP_INVALID_CREDENTIALS;
48	send_ldap_result( op, rs );
49
50	return rs->sr_err;
51}
52
53/* add, delete, modify, modrdn, search */
54static int
55null_back_success( Operation *op, SlapReply *rs )
56{
57	rs->sr_err = LDAP_SUCCESS;
58	send_ldap_result( op, rs );
59	return 0;
60}
61
62/* compare */
63static int
64null_back_false( Operation *op, SlapReply *rs )
65{
66	rs->sr_err = LDAP_COMPARE_FALSE;
67	send_ldap_result( op, rs );
68	return 0;
69}
70
71
72/* for overlays */
73static int
74null_back_entry_get(
75	Operation *op,
76	struct berval *ndn,
77	ObjectClass *oc,
78	AttributeDescription *at,
79	int rw,
80	Entry **ent )
81{
82	assert( *ent == NULL );
83
84	/* don't admit the object isn't there */
85	return oc || at ? LDAP_NO_SUCH_ATTRIBUTE : LDAP_BUSY;
86}
87
88
89/* Slap tools */
90
91static int
92null_tool_entry_open( BackendDB *be, int mode )
93{
94	return 0;
95}
96
97static int
98null_tool_entry_close( BackendDB *be )
99{
100	assert( be != NULL );
101	return 0;
102}
103
104static ID
105null_tool_entry_next( BackendDB *be )
106{
107	return NOID;
108}
109
110static Entry *
111null_tool_entry_get( BackendDB *be, ID id )
112{
113	assert( slapMode & SLAP_TOOL_MODE );
114	return NULL;
115}
116
117static ID
118null_tool_entry_put( BackendDB *be, Entry *e, struct berval *text )
119{
120	assert( slapMode & SLAP_TOOL_MODE );
121	assert( text != NULL );
122	assert( text->bv_val != NULL );
123	assert( text->bv_val[0] == '\0' );	/* overconservative? */
124
125	e->e_id = ((struct null_info *) be->be_private)->ni_nextid++;
126	return e->e_id;
127}
128
129
130/* Setup */
131
132static int
133null_back_db_config(
134	BackendDB	*be,
135	const char	*fname,
136	int		lineno,
137	int		argc,
138	char		**argv )
139{
140	struct null_info *ni = (struct null_info *) be->be_private;
141
142	if ( ni == NULL ) {
143		fprintf( stderr, "%s: line %d: null database info is null!\n",
144			fname, lineno );
145		return 1;
146	}
147
148	/* bind requests allowed */
149	if ( strcasecmp( argv[0], "bind" ) == 0 ) {
150		if ( argc < 2 ) {
151			fprintf( stderr,
152	"%s: line %d: missing <on/off> in \"bind <on/off>\" line\n",
153			         fname, lineno );
154			return 1;
155		}
156		ni->ni_bind_allowed = strcasecmp( argv[1], "off" );
157
158	/* anything else */
159	} else {
160		return SLAP_CONF_UNKNOWN;
161	}
162
163	return 0;
164}
165
166static int
167null_back_db_init( BackendDB *be, ConfigReply *cr )
168{
169	struct null_info *ni = ch_calloc( 1, sizeof(struct null_info) );
170	ni->ni_bind_allowed = 0;
171	ni->ni_nextid = 1;
172	be->be_private = ni;
173	return 0;
174}
175
176static int
177null_back_db_destroy( Backend *be, ConfigReply *cr )
178{
179	free( be->be_private );
180	return 0;
181}
182
183
184int
185null_back_initialize( BackendInfo *bi )
186{
187	bi->bi_open = 0;
188	bi->bi_close = 0;
189	bi->bi_config = 0;
190	bi->bi_destroy = 0;
191
192	bi->bi_db_init = null_back_db_init;
193	bi->bi_db_config = null_back_db_config;
194	bi->bi_db_open = 0;
195	bi->bi_db_close = 0;
196	bi->bi_db_destroy = null_back_db_destroy;
197
198	bi->bi_op_bind = null_back_bind;
199	bi->bi_op_unbind = 0;
200	bi->bi_op_search = null_back_success;
201	bi->bi_op_compare = null_back_false;
202	bi->bi_op_modify = null_back_success;
203	bi->bi_op_modrdn = null_back_success;
204	bi->bi_op_add = null_back_success;
205	bi->bi_op_delete = null_back_success;
206	bi->bi_op_abandon = 0;
207
208	bi->bi_extended = 0;
209
210	bi->bi_chk_referrals = 0;
211
212	bi->bi_connection_init = 0;
213	bi->bi_connection_destroy = 0;
214
215	bi->bi_entry_get_rw = null_back_entry_get;
216
217	bi->bi_tool_entry_open = null_tool_entry_open;
218	bi->bi_tool_entry_close = null_tool_entry_close;
219	bi->bi_tool_entry_first = null_tool_entry_next;
220	bi->bi_tool_entry_next = null_tool_entry_next;
221	bi->bi_tool_entry_get = null_tool_entry_get;
222	bi->bi_tool_entry_put = null_tool_entry_put;
223
224	return 0;
225}
226
227#if SLAPD_NULL == SLAPD_MOD_DYNAMIC
228
229/* conditionally define the init_module() function */
230SLAP_BACKEND_INIT_MODULE( null )
231
232#endif /* SLAPD_NULL == SLAPD_MOD_DYNAMIC */
233