2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1999-2004 The OpenLDAP Foundation.
5 * Portions Copyright 1999 Dmitry Kovalev.
6 * Portions Copyright 2002 Pierangelo Mararati.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
13 * A copy of this license is available in the file LICENSE in the
14 * top-level directory of the distribution or, alternatively, at
15 * <http://www.OpenLDAP.org/license.html>.
18 * This work was initially developed by Dmitry Kovalev for inclusion
19 * by OpenLDAP Software. Additional significant contributors include
24 * The following changes have been addressed:
27 * - re-styled code for better readability
28 * - upgraded backend API to reflect recent changes
29 * - LDAP schema is checked when loading SQL/LDAP mapping
30 * - AttributeDescription/ObjectClass pointers used for more efficient
32 * - bervals used where string length is required often
33 * - atomized write operations by committing at the end of each operation
34 * and defaulting connection closure to rollback
35 * - added LDAP access control to write operations
36 * - fully implemented modrdn (with rdn attrs change, deleteoldrdn,
37 * access check, parent/children check and more)
38 * - added parent access control, children control to delete operation
39 * - added structuralObjectClass operational attribute check and
40 * value return on search
41 * - added hasSubordinate operational attribute on demand
42 * - search limits are appropriately enforced
43 * - function backsql_strcat() has been made more efficient
44 * - concat function has been made configurable by means of a pattern
45 * - added config switches:
46 * - fail_if_no_mapping write operations fail if there is no mapping
47 * - has_ldapinfo_dn_ru overrides autodetect
48 * - concat_pattern a string containing two '?' is used
49 * (note that "?||?" should be more portable
50 * than builtin function "CONCAT(?,?)")
51 * - strcast_func cast of string constants in "SELECT DISTINCT
52 * statements (needed by PostgreSQL)
53 * - upper_needs_cast cast the argument of upper when required
54 * (basically when building dn substring queries)
55 * - added noop control
56 * - added values return filter control
57 * - hasSubordinate can be used in search filters (with limitations)
58 * - eliminated oc->name; use oc->oc->soc_cname instead
61 * - add security checks for SQL statements that can be injected (?)
62 * - re-test with previously supported RDBMs
63 * - replace dn_ru and so with normalized dn (no need for upper() and so
65 * - implement a backsql_normalize() function to replace the upper()
67 * - note that subtree deletion, subtree renaming and so could be easily
68 * implemented (rollback and consistency checks are available :)
69 * - implement "lastmod" and other operational stuff (ldap_entries table ?)
70 * - check how to allow multiple operations with one statement, to remove
71 * BACKSQL_REALLOC_STMT from modify.c (a more recent unixODBC lib?)
78 #include "sql-types.h"
81 * PostgreSQL 7.0 doesn't work without :(
83 #define BACKSQL_REALLOC_STMT
86 * Better use the standard length of 8192 (as of slap.h)?
88 /* #define BACKSQL_MAX_DN_LEN SLAP_LDAPDN_MAXLEN */
89 #define BACKSQL_MAX_DN_LEN 255
92 * define to enable very extensive trace logging (debug only)
98 * define to enable varchars as unique keys in user tables
100 #undef BACKSQL_ARBITRARY_KEY
103 * define to the appropriate aliasing string
105 #define BACKSQL_ALIASING "AS "
106 /* #define BACKSQL_ALIASING "" */
109 * define to the appropriate quoting char
111 /* #define BACKSQL_ALIASING_QUOTE '"' */
112 /* #define BACKSQL_ALIASING_QUOTE '\'' */
117 typedef struct backsql_api {
119 int (*ba_dn2odbc)( Operation *op, SlapReply *rs, struct berval *dn );
120 int (*ba_odbc2dn)( Operation *op, SlapReply *rs, struct berval *dn );
121 struct backsql_api *ba_next;
127 typedef struct backsql_entryID {
128 /* #define BACKSQL_ARBITRARY_KEY to allow a non-numeric key.
129 * It is required by some special applications that use
130 * strings as keys for the main table.
131 * In this case, #define BACKSQL_MAX_KEY_LEN consistently
132 * with the key size definition */
133 #ifdef BACKSQL_ARBITRARY_KEY
134 struct berval eid_id;
135 struct berval eid_keyval;
136 #define BACKSQL_MAX_KEY_LEN 64
137 #else /* ! BACKSQL_ARBITRARY_KEY */
138 /* The original numeric key is maintained as default. */
139 unsigned long eid_id;
140 unsigned long eid_keyval;
141 #endif /* ! BACKSQL_ARBITRARY_KEY */
143 unsigned long eid_oc_id;
144 struct berval eid_dn;
145 struct backsql_entryID *eid_next;
148 #ifdef BACKSQL_ARBITRARY_KEY
149 #define BACKSQL_ENTRYID_INIT { BER_BVNULL, BER_BVNULL, 0, BER_BVNULL, NULL }
150 #else /* ! BACKSQL_ARBITRARY_KEY */
151 #define BACKSQL_ENTRYID_INIT { 0, 0, 0, BER_BVNULL, NULL }
152 #endif /* BACKSQL_ARBITRARY_KEY */
155 * "structural" objectClass mapping structure
157 typedef struct backsql_oc_map_rec {
159 * Structure of corresponding LDAP objectClass definition
162 #define BACKSQL_OC_NAME(ocmap) ((ocmap)->bom_oc->soc_cname.bv_val)
164 struct berval bom_keytbl;
165 struct berval bom_keycol;
166 /* expected to return keyval of newly created entry */
167 char *bom_create_proc;
168 /* in case create_proc does not return the keyval of the newly
170 char *bom_create_keyval;
171 /* supposed to expect keyval as parameter and delete
172 * all the attributes as well */
173 char *bom_delete_proc;
174 /* flags whether delete_proc is a function (whether back-sql
175 * should bind first parameter as output for return code) */
176 int bom_expect_return;
177 unsigned long bom_id;
179 } backsql_oc_map_rec;
182 * attributeType mapping structure
184 typedef struct backsql_at_map_rec {
185 /* Description of corresponding LDAP attribute type */
186 AttributeDescription *bam_ad;
187 /* ObjectClass if bam_ad is objectClass */
190 struct berval bam_from_tbls;
191 struct berval bam_join_where;
192 struct berval bam_sel_expr;
194 /* TimesTen, or, if a uppercase function is defined,
195 * an uppercased version of bam_sel_expr */
196 struct berval bam_sel_expr_u;
198 /* supposed to expect 2 binded values: entry keyval
199 * and attr. value to add, like "add_name(?,?,?)" */
201 /* supposed to expect 2 binded values: entry keyval
202 * and attr. value to delete */
203 char *bam_delete_proc;
204 /* for optimization purposes attribute load query
205 * is preconstructed from parts on schemamap load time */
207 /* following flags are bitmasks (first bit used for add_proc,
208 * second - for delete_proc) */
209 /* order of parameters for procedures above;
210 * 1 means "data then keyval", 0 means "keyval then data" */
212 /* flags whether one or more of procedures is a function
213 * (whether back-sql should bind first parameter as output
214 * for return code) */
215 int bam_expect_return;
217 /* next mapping for attribute */
218 struct backsql_at_map_rec *bam_next;
219 } backsql_at_map_rec;
221 #define BACKSQL_AT_MAP_REC_INIT { NULL, NULL, BER_BVC(""), BER_BVC(""), BER_BVNULL, BER_BVNULL, NULL, NULL, NULL, 0, 0, NULL }
223 /* define to uppercase filters only if the matching rule requires it
224 * (currently broken) */
225 /* #define BACKSQL_UPPERCASE_FILTER */
227 #define BACKSQL_AT_CANUPPERCASE(at) ((at)->bam_sel_expr_u.bv_val)
229 /* defines to support bitmasks above */
230 #define BACKSQL_ADD 0x1
231 #define BACKSQL_DEL 0x2
233 #define BACKSQL_IS_ADD(x) ( BACKSQL_ADD & (x) )
234 #define BACKSQL_IS_DEL(x) ( BACKSQL_DEL & (x) )
236 #define BACKSQL_NCMP(v1,v2) ber_bvcmp((v1),(v2))
238 #define BACKSQL_CONCAT
240 * berbuf structure: a berval with a buffer size associated
242 typedef struct berbuf {
243 struct berval bb_val;
247 #define BB_NULL { { 0, NULL }, 0 }
249 typedef struct backsql_srch_info {
254 #define BSQL_SF_ALL_OPER 0x0001
255 #define BSQL_SF_FILTER_HASSUBORDINATE 0x0002
257 struct berval *bsi_base_dn;
258 backsql_entryID bsi_base_id;
260 #define BACKSQL_SCOPE_BASE_LIKE ( LDAP_SCOPE_BASE | 0x1000 )
266 backsql_entryID *bsi_id_list,
269 int bsi_n_candidates;
273 backsql_oc_map_rec *bsi_oc;
274 struct berbuf bsi_sel,
278 ObjectClass *bsi_filter_oc;
280 AttributeName *bsi_attrs;
286 * Backend private data structure
295 * SQL condition for subtree searches differs in syntax:
296 * "LIKE CONCAT('%',?)" or "LIKE '%'+?" or "LIKE '%'||?"
299 struct berval subtree_cond;
300 struct berval children_cond;
301 char *oc_query, *at_query;
302 char *insentry_query,
304 *delobjclasses_query,
307 char *has_children_query;
309 MatchingRule *bi_caseIgnoreMatch;
310 MatchingRule *bi_telephoneNumberMatch;
312 struct berval upper_func;
313 struct berval upper_func_open;
314 struct berval upper_func_close;
315 BerVarray concat_func;
317 unsigned int bsql_flags;
318 #define BSQLF_SCHEMA_LOADED 0x0001
319 #define BSQLF_UPPER_NEEDS_CAST 0x0002
320 #define BSQLF_CREATE_NEEDS_SELECT 0x0004
321 #define BSQLF_FAIL_IF_NO_MAPPING 0x0008
322 #define BSQLF_HAS_LDAPINFO_DN_RU 0x0010
323 #define BSQLF_DONTCHECK_LDAPINFO_DN_RU 0x0020
324 #define BSQLF_USE_REVERSE_DN 0x0040
325 #define BSQLF_ALLOW_ORPHANS 0x0080
327 #define BACKSQL_SCHEMA_LOADED(si) \
328 ((si)->bsql_flags & BSQLF_SCHEMA_LOADED)
329 #define BACKSQL_UPPER_NEEDS_CAST(si) \
330 ((si)->bsql_flags & BSQLF_UPPER_NEEDS_CAST)
331 #define BACKSQL_CREATE_NEEDS_SELECT(si) \
332 ((si)->bsql_flags & BSQLF_CREATE_NEEDS_SELECT)
333 #define BACKSQL_FAIL_IF_NO_MAPPING(si) \
334 ((si)->bsql_flags & BSQLF_FAIL_IF_NO_MAPPING)
335 #define BACKSQL_HAS_LDAPINFO_DN_RU(si) \
336 ((si)->bsql_flags & BSQLF_HAS_LDAPINFO_DN_RU)
337 #define BACKSQL_DONTCHECK_LDAPINFO_DN_RU(si) \
338 ((si)->bsql_flags & BSQLF_DONTCHECK_LDAPINFO_DN_RU)
339 #define BACKSQL_USE_REVERSE_DN(si) \
340 ((si)->bsql_flags & BSQLF_USE_REVERSE_DN)
341 #define BACKSQL_CANUPPERCASE(si) \
342 ((si)->upper_func.bv_val)
343 #define BACKSQL_ALLOW_ORPHANS(si) \
344 ((si)->bsql_flags & BSQLF_ALLOW_ORPHANS)
346 struct berval strcast_func;
350 ldap_pvt_thread_mutex_t dbconn_mutex;
351 ldap_pvt_thread_mutex_t schema_mutex;
357 #define BACKSQL_SUCCESS( rc ) \
358 ( (rc) == SQL_SUCCESS || (rc) == SQL_SUCCESS_WITH_INFO )
360 #define BACKSQL_AVL_STOP 0
361 #define BACKSQL_AVL_CONTINUE 1
363 #endif /* __BACKSQL_H__ */