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 to the list of ldif handlers for this ldb context
38 int ldb_set_attrib_handlers(struct ldb_context *ldb,
39 const struct ldb_attrib_handler *handlers,
40 unsigned num_handlers)
42 struct ldb_attrib_handler *h;
43 h = talloc_realloc(ldb, ldb->schema.attrib_handlers,
44 struct ldb_attrib_handler,
45 ldb->schema.num_attrib_handlers + num_handlers);
50 ldb->schema.attrib_handlers = h;
51 memcpy(h + ldb->schema.num_attrib_handlers,
52 handlers, sizeof(*h) * num_handlers);
53 ldb->schema.num_attrib_handlers += num_handlers;
59 default function for read/write/canonicalise
61 static int ldb_default_copy(struct ldb_context *ldb,
63 const struct ldb_val *in,
66 *out = ldb_val_dup(mem_ctx, in);
68 if (out->data == NULL && in->data != NULL) {
76 default function for comparison
78 static int ldb_default_cmp(struct ldb_context *ldb,
80 const struct ldb_val *v1,
81 const struct ldb_val *v2)
83 if (v1->length != v2->length) {
84 return v1->length - v2->length;
86 return memcmp(v1->data, v2->data, v1->length);
90 default handler function pointers
92 static const struct ldb_attrib_handler ldb_default_attrib_handler = {
94 .ldif_read_fn = ldb_default_copy,
95 .ldif_write_fn = ldb_default_copy,
96 .canonicalise_fn = ldb_default_copy,
97 .comparison_fn = ldb_default_cmp,
101 return the attribute handlers for a given attribute
103 const struct ldb_attrib_handler *ldb_attrib_handler(struct ldb_context *ldb,
107 const struct ldb_attrib_handler *def = &ldb_default_attrib_handler;
108 /* TODO: should be replaced with a binary search, with a sort on add */
109 for (i=0;i<ldb->schema.num_attrib_handlers;i++) {
110 if (strcmp(ldb->schema.attrib_handlers[i].attr, "*") == 0) {
111 def = &ldb->schema.attrib_handlers[i];
113 if (ldb_attr_cmp(attrib, ldb->schema.attrib_handlers[i].attr) == 0) {
114 return &ldb->schema.attrib_handlers[i];
122 add to the list of ldif handlers for this ldb context
124 void ldb_remove_attrib_handler(struct ldb_context *ldb, const char *attrib)
126 const struct ldb_attrib_handler *h;
128 h = ldb_attrib_handler(ldb, attrib);
129 if (h == &ldb_default_attrib_handler) {
132 i = h - ldb->schema.attrib_handlers;
133 if (i < ldb->schema.num_attrib_handlers - 1) {
134 memmove(&ldb->schema.attrib_handlers[i],
135 h+1, sizeof(*h) * (ldb->schema.num_attrib_handlers-(i+1)));
137 ldb->schema.num_attrib_handlers--;
141 setup a attribute handler using a standard syntax
143 int ldb_set_attrib_handler_syntax(struct ldb_context *ldb,
144 const char *attr, const char *syntax)
146 const struct ldb_attrib_handler *h = ldb_attrib_handler_syntax(ldb, syntax);
147 struct ldb_attrib_handler h2;
149 ldb_debug(ldb, LDB_DEBUG_ERROR, "Unknown syntax '%s'\n", syntax);
154 return ldb_set_attrib_handlers(ldb, &h2, 1);
158 setup the attribute handles for well known attributes
160 int ldb_setup_wellknown_attributes(struct ldb_context *ldb)
166 { "dn", LDB_SYNTAX_DN },
167 { "ncName", LDB_SYNTAX_DN },
168 { "distinguishedName", LDB_SYNTAX_DN },
169 { "cn", LDB_SYNTAX_DIRECTORY_STRING },
170 { "dc", LDB_SYNTAX_DIRECTORY_STRING },
171 { "ou", LDB_SYNTAX_DIRECTORY_STRING },
172 { "objectClass", LDB_SYNTAX_OBJECTCLASS }
175 for (i=0;i<ARRAY_SIZE(wellknown);i++) {
176 if (ldb_set_attrib_handler_syntax(ldb, wellknown[i].attr,
177 wellknown[i].syntax) != 0) {
186 return the list of subclasses for a class
188 const char **ldb_subclass_list(struct ldb_context *ldb, const char *class)
191 for (i=0;i<ldb->schema.num_classes;i++) {
192 if (ldb_attr_cmp(class, ldb->schema.classes[i].name) == 0) {
193 return (const char **)ldb->schema.classes[i].subclasses;
203 static int ldb_subclass_new(struct ldb_context *ldb, const char *class, const char *subclass)
205 struct ldb_subclass *s, *c;
206 s = talloc_realloc(ldb, ldb->schema.classes, struct ldb_subclass, ldb->schema.num_classes+1);
207 if (s == NULL) goto failed;
209 ldb->schema.classes = s;
210 c = &s[ldb->schema.num_classes];
211 c->name = talloc_strdup(s, class);
212 if (c->name == NULL) goto failed;
214 c->subclasses = talloc_array(s, char *, 2);
215 if (c->subclasses == NULL) goto failed;
217 c->subclasses[0] = talloc_strdup(c->subclasses, subclass);
218 if (c->subclasses[0] == NULL) goto failed;
219 c->subclasses[1] = NULL;
221 ldb->schema.num_classes++;
232 int ldb_subclass_add(struct ldb_context *ldb, const char *class, const char *subclass)
235 struct ldb_subclass *c;
238 for (i=0;i<ldb->schema.num_classes;i++) {
239 if (ldb_attr_cmp(class, ldb->schema.classes[i].name) == 0) {
243 if (i == ldb->schema.num_classes) {
244 return ldb_subclass_new(ldb, class, subclass);
246 c = &ldb->schema.classes[i];
248 for (n=0;c->subclasses[n];n++) /* noop */;
250 s = talloc_realloc(ldb->schema.classes, c->subclasses, char *, n+2);
257 s[n] = talloc_strdup(s, subclass);
268 remove a set of subclasses for a class
270 void ldb_subclass_remove(struct ldb_context *ldb, const char *class)
273 struct ldb_subclass *c;
275 for (i=0;i<ldb->schema.num_classes;i++) {
276 if (ldb_attr_cmp(class, ldb->schema.classes[i].name) == 0) {
280 if (i == ldb->schema.num_classes) {
284 c = &ldb->schema.classes[i];
285 talloc_free(c->name);
286 talloc_free(c->subclasses);
287 if (ldb->schema.num_classes-(i+1) > 0) {
288 memmove(c, c+1, sizeof(*c) * (ldb->schema.num_classes-(i+1)));
290 ldb->schema.num_classes--;
291 if (ldb->schema.num_classes == 0) {
292 talloc_free(ldb->schema.classes);
293 ldb->schema.classes = NULL;