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/ldb.h"
34 #include "ldb/include/ldb_private.h"
37 add to the list of ldif handlers for this ldb context
39 int ldb_set_attrib_handlers(struct ldb_context *ldb,
40 const struct ldb_attrib_handler *handlers,
41 unsigned num_handlers)
43 struct ldb_attrib_handler *h;
44 h = talloc_realloc(ldb, ldb->schema.attrib_handlers,
45 struct ldb_attrib_handler,
46 ldb->schema.num_attrib_handlers + num_handlers);
51 ldb->schema.attrib_handlers = h;
52 memcpy(h + ldb->schema.num_attrib_handlers,
53 handlers, sizeof(*h) * num_handlers);
54 ldb->schema.num_attrib_handlers += num_handlers;
60 default function for read/write/canonicalise
62 static int ldb_default_copy(struct ldb_context *ldb,
64 const struct ldb_val *in,
67 *out = ldb_val_dup(mem_ctx, in);
69 if (out->data == NULL && in->data != NULL) {
77 default function for comparison
79 static int ldb_default_cmp(struct ldb_context *ldb,
81 const struct ldb_val *v1,
82 const struct ldb_val *v2)
84 if (v1->length != v2->length) {
85 return v1->length - v2->length;
87 return memcmp(v1->data, v2->data, v1->length);
91 default handler function pointers
93 static const struct ldb_attrib_handler ldb_default_attrib_handler = {
95 .ldif_read_fn = ldb_default_copy,
96 .ldif_write_fn = ldb_default_copy,
97 .canonicalise_fn = ldb_default_copy,
98 .comparison_fn = ldb_default_cmp,
102 return the attribute handlers for a given attribute
104 const struct ldb_attrib_handler *ldb_attrib_handler(struct ldb_context *ldb,
108 const struct ldb_attrib_handler *def = &ldb_default_attrib_handler;
109 /* TODO: should be replaced with a binary search, with a sort on add */
110 for (i=0;i<ldb->schema.num_attrib_handlers;i++) {
111 if (strcmp(ldb->schema.attrib_handlers[i].attr, "*") == 0) {
112 def = &ldb->schema.attrib_handlers[i];
114 if (ldb_attr_cmp(attrib, ldb->schema.attrib_handlers[i].attr) == 0) {
115 return &ldb->schema.attrib_handlers[i];
123 add to the list of ldif handlers for this ldb context
125 void ldb_remove_attrib_handler(struct ldb_context *ldb, const char *attrib)
127 const struct ldb_attrib_handler *h;
129 h = ldb_attrib_handler(ldb, attrib);
130 if (h == &ldb_default_attrib_handler) {
133 i = h - ldb->schema.attrib_handlers;
134 if (i < ldb->schema.num_attrib_handlers - 1) {
135 memmove(&ldb->schema.attrib_handlers[i],
136 h+1, sizeof(*h) * (ldb->schema.num_attrib_handlers-(i+1)));
138 ldb->schema.num_attrib_handlers--;
142 setup a attribute handler using a standard syntax
144 int ldb_set_attrib_handler_syntax(struct ldb_context *ldb,
145 const char *attr, const char *syntax)
147 const struct ldb_attrib_handler *h = ldb_attrib_handler_syntax(ldb, syntax);
148 struct ldb_attrib_handler h2;
150 ldb_debug(ldb, LDB_DEBUG_ERROR, "Unknown syntax '%s'\n", syntax);
155 return ldb_set_attrib_handlers(ldb, &h2, 1);
159 setup the attribute handles for well known attributes
161 int ldb_setup_wellknown_attributes(struct ldb_context *ldb)
167 { "dn", LDB_SYNTAX_DN },
168 { "ncName", LDB_SYNTAX_DN },
169 { "distinguishedName", LDB_SYNTAX_DN },
170 { "cn", LDB_SYNTAX_DIRECTORY_STRING },
171 { "dc", LDB_SYNTAX_DIRECTORY_STRING },
172 { "ou", LDB_SYNTAX_DIRECTORY_STRING },
173 { "objectClass", LDB_SYNTAX_OBJECTCLASS }
176 for (i=0;i<ARRAY_SIZE(wellknown);i++) {
177 if (ldb_set_attrib_handler_syntax(ldb, wellknown[i].attr,
178 wellknown[i].syntax) != 0) {
187 return the list of subclasses for a class
189 const char **ldb_subclass_list(struct ldb_context *ldb, const char *class)
192 for (i=0;i<ldb->schema.num_classes;i++) {
193 if (ldb_attr_cmp(class, ldb->schema.classes[i].name) == 0) {
194 return (const char **)ldb->schema.classes[i].subclasses;
204 static int ldb_subclass_new(struct ldb_context *ldb, const char *class, const char *subclass)
206 struct ldb_subclass *s, *c;
207 s = talloc_realloc(ldb, ldb->schema.classes, struct ldb_subclass, ldb->schema.num_classes+1);
208 if (s == NULL) goto failed;
210 ldb->schema.classes = s;
211 c = &s[ldb->schema.num_classes];
212 c->name = talloc_strdup(s, class);
213 if (c->name == NULL) goto failed;
215 c->subclasses = talloc_array(s, char *, 2);
216 if (c->subclasses == NULL) goto failed;
218 c->subclasses[0] = talloc_strdup(c->subclasses, subclass);
219 if (c->subclasses[0] == NULL) goto failed;
220 c->subclasses[1] = NULL;
222 ldb->schema.num_classes++;
233 int ldb_subclass_add(struct ldb_context *ldb, const char *class, const char *subclass)
236 struct ldb_subclass *c;
239 for (i=0;i<ldb->schema.num_classes;i++) {
240 if (ldb_attr_cmp(class, ldb->schema.classes[i].name) == 0) {
244 if (i == ldb->schema.num_classes) {
245 return ldb_subclass_new(ldb, class, subclass);
247 c = &ldb->schema.classes[i];
249 for (n=0;c->subclasses[n];n++) /* noop */;
251 s = talloc_realloc(ldb->schema.classes, c->subclasses, char *, n+2);
258 s[n] = talloc_strdup(s, subclass);
269 remove a set of subclasses for a class
271 void ldb_subclass_remove(struct ldb_context *ldb, const char *class)
274 struct ldb_subclass *c;
276 for (i=0;i<ldb->schema.num_classes;i++) {
277 if (ldb_attr_cmp(class, ldb->schema.classes[i].name) == 0) {
281 if (i == ldb->schema.num_classes) {
285 c = &ldb->schema.classes[i];
286 talloc_free(c->name);
287 talloc_free(c->subclasses);
288 if (ldb->schema.num_classes-(i+1) > 0) {
289 memmove(c, c+1, sizeof(*c) * (ldb->schema.num_classes-(i+1)));
291 ldb->schema.num_classes--;
292 if (ldb->schema.num_classes == 0) {
293 talloc_free(ldb->schema.classes);
294 ldb->schema.classes = NULL;