4 Copyright (C) Andrew Tridgell 2005
6 ** NOTE! The following LGPL license applies to the ldb
7 ** library. This does NOT imply that all of Samba is released
10 This library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 3 of the License, or (at your option) any later version.
15 This library is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 register handlers for specific attributes and objectclass relationships
26 this allows a backend to store its schema information in any format
27 it likes (or to not have any schema information at all) while keeping the
28 message matching logic generic
31 #include "ldb_private.h"
32 #include "ldb_handlers.h"
35 add a attribute to the ldb_schema
37 if flags contains LDB_ATTR_FLAG_ALLOCATED
38 the attribute name string will be copied using
39 talloc_strdup(), otherwise it needs to be a static const
40 string at least with a lifetime longer than the ldb struct!
42 the ldb_schema_syntax structure should be a pointer
43 to a static const struct or at least it needs to be
44 a struct with a longer lifetime than the ldb context!
47 int ldb_schema_attribute_add_with_syntax(struct ldb_context *ldb,
48 const char *attribute,
50 const struct ldb_schema_syntax *syntax)
53 struct ldb_schema_attribute *a;
56 return LDB_ERR_OPERATIONS_ERROR;
59 n = ldb->schema.num_attributes + 1;
61 a = talloc_realloc(ldb, ldb->schema.attributes,
62 struct ldb_schema_attribute, n);
67 ldb->schema.attributes = a;
69 for (i = 0; i < ldb->schema.num_attributes; i++) {
70 int cmp = ldb_attr_cmp(attribute, a[i].name);
72 /* silently ignore attempts to overwrite fixed attributes */
73 if (a[i].flags & LDB_ATTR_FLAG_FIXED) {
76 if (a[i].flags & LDB_ATTR_FLAG_ALLOCATED) {
77 talloc_free(discard_const_p(char, a[i].name));
79 /* To cancel out increment below */
80 ldb->schema.num_attributes--;
83 memmove(a+i+1, a+i, sizeof(*a) * (ldb->schema.num_attributes-i));
87 ldb->schema.num_attributes++;
89 a[i].name = attribute;
93 if (a[i].flags & LDB_ATTR_FLAG_ALLOCATED) {
94 a[i].name = talloc_strdup(a, a[i].name);
95 if (a[i].name == NULL) {
104 static const struct ldb_schema_syntax ldb_syntax_default = {
105 .name = LDB_SYNTAX_OCTET_STRING,
106 .ldif_read_fn = ldb_handler_copy,
107 .ldif_write_fn = ldb_handler_copy,
108 .canonicalise_fn = ldb_handler_copy,
109 .comparison_fn = ldb_comparison_binary
112 static const struct ldb_schema_attribute ldb_attribute_default = {
115 .syntax = &ldb_syntax_default
119 return the attribute handlers for a given attribute
121 static const struct ldb_schema_attribute *ldb_schema_attribute_by_name_internal(
122 struct ldb_context *ldb,
125 /* for binary search we need signed variables */
126 long long int i, e, b = 0;
128 const struct ldb_schema_attribute *def = &ldb_attribute_default;
130 /* as handlers are sorted, '*' must be the first if present */
131 if (strcmp(ldb->schema.attributes[0].name, "*") == 0) {
132 def = &ldb->schema.attributes[0];
136 /* do a binary search on the array */
137 e = ldb->schema.num_attributes - 1;
142 r = ldb_attr_cmp(name, ldb->schema.attributes[i].name);
144 return &ldb->schema.attributes[i];
158 return the attribute handlers for a given attribute
160 const struct ldb_schema_attribute *ldb_schema_attribute_by_name(struct ldb_context *ldb,
163 if (ldb->schema.attribute_handler_override) {
164 const struct ldb_schema_attribute *ret =
165 ldb->schema.attribute_handler_override(ldb,
166 ldb->schema.attribute_handler_override_private,
173 return ldb_schema_attribute_by_name_internal(ldb, name);
178 add to the list of ldif handlers for this ldb context
180 void ldb_schema_attribute_remove(struct ldb_context *ldb, const char *name)
182 const struct ldb_schema_attribute *a;
185 a = ldb_schema_attribute_by_name_internal(ldb, name);
186 if (a == NULL || a->name == NULL) {
190 /* FIXED attributes are never removed */
191 if (a->flags & LDB_ATTR_FLAG_FIXED) {
195 if (a->flags & LDB_ATTR_FLAG_ALLOCATED) {
196 talloc_free(discard_const_p(char, a->name));
199 i = a - ldb->schema.attributes;
200 if (i < ldb->schema.num_attributes - 1) {
201 memmove(&ldb->schema.attributes[i],
202 a+1, sizeof(*a) * (ldb->schema.num_attributes-(i+1)));
205 ldb->schema.num_attributes--;
209 setup a attribute handler using a standard syntax
211 int ldb_schema_attribute_add(struct ldb_context *ldb,
212 const char *attribute,
216 const struct ldb_schema_syntax *s = ldb_standard_syntax_by_name(ldb, syntax);
217 return ldb_schema_attribute_add_with_syntax(ldb, attribute, flags, s);
221 setup the attribute handles for well known attributes
223 int ldb_setup_wellknown_attributes(struct ldb_context *ldb)
229 { "dn", LDB_SYNTAX_DN },
230 { "distinguishedName", LDB_SYNTAX_DN },
231 { "cn", LDB_SYNTAX_DIRECTORY_STRING },
232 { "dc", LDB_SYNTAX_DIRECTORY_STRING },
233 { "ou", LDB_SYNTAX_DIRECTORY_STRING },
234 { "objectClass", LDB_SYNTAX_OBJECTCLASS }
239 for (i=0;i<ARRAY_SIZE(wellknown);i++) {
240 ret = ldb_schema_attribute_add(ldb, wellknown[i].attr, 0,
241 wellknown[i].syntax);
242 if (ret != LDB_SUCCESS) {
252 add a extended dn syntax to the ldb_schema
254 int ldb_dn_extended_add_syntax(struct ldb_context *ldb,
256 const struct ldb_dn_extended_syntax *syntax)
259 struct ldb_dn_extended_syntax *a;
262 return LDB_ERR_OPERATIONS_ERROR;
265 n = ldb->schema.num_dn_extended_syntax + 1;
267 a = talloc_realloc(ldb, ldb->schema.dn_extended_syntax,
268 struct ldb_dn_extended_syntax, n);
271 return LDB_ERR_OPERATIONS_ERROR;
274 a[ldb->schema.num_dn_extended_syntax] = *syntax;
275 ldb->schema.dn_extended_syntax = a;
277 ldb->schema.num_dn_extended_syntax = n;
283 return the extended dn syntax for a given name
285 const struct ldb_dn_extended_syntax *ldb_dn_extended_syntax_by_name(struct ldb_context *ldb,
289 for (i=0; i < ldb->schema.num_dn_extended_syntax; i++) {
290 if (ldb_attr_cmp(ldb->schema.dn_extended_syntax[i].name, name) == 0) {
291 return &ldb->schema.dn_extended_syntax[i];
298 set an attribute handler override function - used to delegate schema handling
301 void ldb_schema_attribute_set_override_handler(struct ldb_context *ldb,
302 ldb_attribute_handler_override_fn_t override,
305 ldb->schema.attribute_handler_override_private = private_data;
306 ldb->schema.attribute_handler_override = override;