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 2 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, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 register handlers for specific attributes and objectclass relationships
27 this allows a backend to store its schema information in any format
28 it likes (or to not have any schema information at all) while keeping the
29 message matching logic generic
33 #include "ldb/include/includes.h"
36 add a attribute to the ldb_schema
38 if flags contains LDB_ATTR_FLAG_ALLOCATED
39 the attribute name string will be copied using
40 talloc_strdup(), otherwise it needs to be a static const
41 string at least with a lifetime longer than the ldb struct!
43 the ldb_schema_syntax structure should be a pointer
44 to a static const struct or at least it needs to be
45 a struct with a longer lifetime than the ldb context!
48 int ldb_schema_attribute_add_with_syntax(struct ldb_context *ldb,
49 const char *attribute,
51 const struct ldb_schema_syntax *syntax)
54 struct ldb_schema_attribute *a;
56 n = ldb->schema.num_attributes + 1;
58 a = talloc_realloc(ldb, ldb->schema.attributes,
59 struct ldb_schema_attribute, n);
64 ldb->schema.attributes = a;
66 for (i = 0; i < ldb->schema.num_attributes; i++) {
67 if (ldb_attr_cmp(attribute, a[i].name) < 0) {
68 memmove(a+i+1, a+i, sizeof(*a) * (ldb->schema.num_attributes-i));
73 a[i].name = attribute;
77 if (a[i].flags & LDB_ATTR_FLAG_ALLOCATED) {
78 a[i].name = talloc_strdup(a, a[i].name);
79 if (a[i].name == NULL) {
85 ldb->schema.num_attributes++;
89 static const struct ldb_schema_syntax ldb_syntax_default = {
90 .name = LDB_SYNTAX_OCTET_STRING,
91 .ldif_read_fn = ldb_handler_copy,
92 .ldif_write_fn = ldb_handler_copy,
93 .canonicalise_fn = ldb_handler_copy,
94 .comparison_fn = ldb_comparison_binary
97 static const struct ldb_schema_attribute ldb_attribute_default = {
100 .syntax = &ldb_syntax_default
104 return the attribute handlers for a given attribute
106 const struct ldb_schema_attribute *ldb_schema_attribute_by_name(struct ldb_context *ldb,
110 const struct ldb_schema_attribute *def = &ldb_attribute_default;
112 /* as handlers are sorted, '*' must be the first if present */
113 if (strcmp(ldb->schema.attributes[0].name, "*") == 0) {
114 def = &ldb->schema.attributes[0];
118 /* do a binary search on the array */
119 e = ldb->schema.num_attributes - 1;
125 r = ldb_attr_cmp(name, ldb->schema.attributes[i].name);
127 return &ldb->schema.attributes[i];
142 add to the list of ldif handlers for this ldb context
144 void ldb_schema_attribute_remove(struct ldb_context *ldb, const char *name)
146 const struct ldb_schema_attribute *a;
149 a = ldb_schema_attribute_by_name(ldb, name);
154 if (a->flags & LDB_ATTR_FLAG_ALLOCATED) {
155 talloc_free(discard_const_p(char, a->name));
158 i = a - ldb->schema.attributes;
159 if (i < ldb->schema.num_attributes - 1) {
160 memmove(&ldb->schema.attributes[i],
161 a+1, sizeof(*a) * (ldb->schema.num_attributes-(i+1)));
164 ldb->schema.num_attributes--;
168 setup a attribute handler using a standard syntax
170 int ldb_schema_attribute_add(struct ldb_context *ldb,
171 const char *attribute,
175 const struct ldb_schema_syntax *s = ldb_standard_syntax_by_name(ldb, syntax);
176 return ldb_schema_attribute_add_with_syntax(ldb, attribute, flags, s);
180 setup the attribute handles for well known attributes
182 int ldb_setup_wellknown_attributes(struct ldb_context *ldb)
188 { "dn", LDB_SYNTAX_DN },
189 { "distinguishedName", LDB_SYNTAX_DN },
190 { "cn", LDB_SYNTAX_DIRECTORY_STRING },
191 { "dc", LDB_SYNTAX_DIRECTORY_STRING },
192 { "ou", LDB_SYNTAX_DIRECTORY_STRING },
193 { "objectClass", LDB_SYNTAX_OBJECTCLASS }
198 for (i=0;i<ARRAY_SIZE(wellknown);i++) {
199 ret = ldb_schema_attribute_add(ldb, wellknown[i].attr, 0,
200 wellknown[i].syntax);
201 if (ret != LDB_SUCCESS) {
210 return the list of subclasses for a class
212 const char **ldb_subclass_list(struct ldb_context *ldb, const char *classname)
215 for (i=0;i<ldb->schema.num_classes;i++) {
216 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
217 return (const char **)ldb->schema.classes[i].subclasses;
227 static int ldb_subclass_new(struct ldb_context *ldb, const char *classname, const char *subclass)
229 struct ldb_subclass *s, *c;
230 s = talloc_realloc(ldb, ldb->schema.classes, struct ldb_subclass, ldb->schema.num_classes+1);
231 if (s == NULL) goto failed;
233 ldb->schema.classes = s;
234 c = &s[ldb->schema.num_classes];
235 c->name = talloc_strdup(s, classname);
236 if (c->name == NULL) goto failed;
238 c->subclasses = talloc_array(s, char *, 2);
239 if (c->subclasses == NULL) goto failed;
241 c->subclasses[0] = talloc_strdup(c->subclasses, subclass);
242 if (c->subclasses[0] == NULL) goto failed;
243 c->subclasses[1] = NULL;
245 ldb->schema.num_classes++;
256 int ldb_subclass_add(struct ldb_context *ldb, const char *classname, const char *subclass)
259 struct ldb_subclass *c;
262 for (i=0;i<ldb->schema.num_classes;i++) {
263 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
267 if (i == ldb->schema.num_classes) {
268 return ldb_subclass_new(ldb, classname, subclass);
270 c = &ldb->schema.classes[i];
272 for (n=0;c->subclasses[n];n++) /* noop */;
274 s = talloc_realloc(ldb->schema.classes, c->subclasses, char *, n+2);
281 s[n] = talloc_strdup(s, subclass);
292 remove a set of subclasses for a class
294 void ldb_subclass_remove(struct ldb_context *ldb, const char *classname)
297 struct ldb_subclass *c;
299 for (i=0;i<ldb->schema.num_classes;i++) {
300 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
304 if (i == ldb->schema.num_classes) {
308 c = &ldb->schema.classes[i];
309 talloc_free(c->name);
310 talloc_free(c->subclasses);
311 if (ldb->schema.num_classes-(i+1) > 0) {
312 memmove(c, c+1, sizeof(*c) * (ldb->schema.num_classes-(i+1)));
314 ldb->schema.num_classes--;
315 if (ldb->schema.num_classes == 0) {
316 talloc_free(ldb->schema.classes);
317 ldb->schema.classes = NULL;