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
32 #include "ldb_includes.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;
55 n = ldb->schema.num_attributes + 1;
57 a = talloc_realloc(ldb, ldb->schema.attributes,
58 struct ldb_schema_attribute, n);
63 ldb->schema.attributes = a;
65 for (i = 0; i < ldb->schema.num_attributes; i++) {
66 if (ldb_attr_cmp(attribute, a[i].name) < 0) {
67 memmove(a+i+1, a+i, sizeof(*a) * (ldb->schema.num_attributes-i));
72 a[i].name = attribute;
76 if (a[i].flags & LDB_ATTR_FLAG_ALLOCATED) {
77 a[i].name = talloc_strdup(a, a[i].name);
78 if (a[i].name == NULL) {
84 ldb->schema.num_attributes++;
88 static const struct ldb_schema_syntax ldb_syntax_default = {
89 .name = LDB_SYNTAX_OCTET_STRING,
90 .ldif_read_fn = ldb_handler_copy,
91 .ldif_write_fn = ldb_handler_copy,
92 .canonicalise_fn = ldb_handler_copy,
93 .comparison_fn = ldb_comparison_binary
96 static const struct ldb_schema_attribute ldb_attribute_default = {
99 .syntax = &ldb_syntax_default
103 return the attribute handlers for a given attribute
105 const struct ldb_schema_attribute *ldb_schema_attribute_by_name(struct ldb_context *ldb,
109 const struct ldb_schema_attribute *def = &ldb_attribute_default;
111 /* as handlers are sorted, '*' must be the first if present */
112 if (strcmp(ldb->schema.attributes[0].name, "*") == 0) {
113 def = &ldb->schema.attributes[0];
117 /* do a binary search on the array */
118 e = ldb->schema.num_attributes - 1;
124 r = ldb_attr_cmp(name, ldb->schema.attributes[i].name);
126 return &ldb->schema.attributes[i];
141 add to the list of ldif handlers for this ldb context
143 void ldb_schema_attribute_remove(struct ldb_context *ldb, const char *name)
145 const struct ldb_schema_attribute *a;
148 a = ldb_schema_attribute_by_name(ldb, name);
153 if (a->flags & LDB_ATTR_FLAG_ALLOCATED) {
154 talloc_free(discard_const_p(char, a->name));
157 i = a - ldb->schema.attributes;
158 if (i < ldb->schema.num_attributes - 1) {
159 memmove(&ldb->schema.attributes[i],
160 a+1, sizeof(*a) * (ldb->schema.num_attributes-(i+1)));
163 ldb->schema.num_attributes--;
167 setup a attribute handler using a standard syntax
169 int ldb_schema_attribute_add(struct ldb_context *ldb,
170 const char *attribute,
174 const struct ldb_schema_syntax *s = ldb_standard_syntax_by_name(ldb, syntax);
175 return ldb_schema_attribute_add_with_syntax(ldb, attribute, flags, s);
179 setup the attribute handles for well known attributes
181 int ldb_setup_wellknown_attributes(struct ldb_context *ldb)
187 { "dn", LDB_SYNTAX_DN },
188 { "distinguishedName", LDB_SYNTAX_DN },
189 { "cn", LDB_SYNTAX_DIRECTORY_STRING },
190 { "dc", LDB_SYNTAX_DIRECTORY_STRING },
191 { "ou", LDB_SYNTAX_DIRECTORY_STRING },
192 { "objectClass", LDB_SYNTAX_OBJECTCLASS }
197 for (i=0;i<ARRAY_SIZE(wellknown);i++) {
198 ret = ldb_schema_attribute_add(ldb, wellknown[i].attr, 0,
199 wellknown[i].syntax);
200 if (ret != LDB_SUCCESS) {
209 return the list of subclasses for a class
211 const char **ldb_subclass_list(struct ldb_context *ldb, const char *classname)
214 for (i=0;i<ldb->schema.num_classes;i++) {
215 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
216 return (const char **)ldb->schema.classes[i].subclasses;
226 static int ldb_subclass_new(struct ldb_context *ldb, const char *classname, const char *subclass)
228 struct ldb_subclass *s, *c;
229 s = talloc_realloc(ldb, ldb->schema.classes, struct ldb_subclass, ldb->schema.num_classes+1);
230 if (s == NULL) goto failed;
232 ldb->schema.classes = s;
233 c = &s[ldb->schema.num_classes];
234 c->name = talloc_strdup(s, classname);
235 if (c->name == NULL) goto failed;
237 c->subclasses = talloc_array(s, char *, 2);
238 if (c->subclasses == NULL) goto failed;
240 c->subclasses[0] = talloc_strdup(c->subclasses, subclass);
241 if (c->subclasses[0] == NULL) goto failed;
242 c->subclasses[1] = NULL;
244 ldb->schema.num_classes++;
255 int ldb_subclass_add(struct ldb_context *ldb, const char *classname, const char *subclass)
258 struct ldb_subclass *c;
261 for (i=0;i<ldb->schema.num_classes;i++) {
262 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
266 if (i == ldb->schema.num_classes) {
267 return ldb_subclass_new(ldb, classname, subclass);
269 c = &ldb->schema.classes[i];
271 for (n=0;c->subclasses[n];n++) /* noop */;
273 s = talloc_realloc(ldb->schema.classes, c->subclasses, char *, n+2);
280 s[n] = talloc_strdup(s, subclass);
291 remove a set of subclasses for a class
293 void ldb_subclass_remove(struct ldb_context *ldb, const char *classname)
296 struct ldb_subclass *c;
298 for (i=0;i<ldb->schema.num_classes;i++) {
299 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
303 if (i == ldb->schema.num_classes) {
307 c = &ldb->schema.classes[i];
308 talloc_free(c->name);
309 talloc_free(c->subclasses);
310 if (ldb->schema.num_classes-(i+1) > 0) {
311 memmove(c, c+1, sizeof(*c) * (ldb->schema.num_classes-(i+1)));
313 ldb->schema.num_classes--;
314 if (ldb->schema.num_classes == 0) {
315 talloc_free(ldb->schema.classes);
316 ldb->schema.classes = NULL;