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)
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 for (i=0;i<num_handlers;i++) {
55 if (h[ldb->schema.num_attrib_handlers+i].flags & LDB_ATTR_FLAG_ALLOCATED) {
56 h[ldb->schema.num_attrib_handlers+i].attr = talloc_strdup(ldb->schema.attrib_handlers,
57 h[ldb->schema.num_attrib_handlers+i].attr);
58 if (h[ldb->schema.num_attrib_handlers+i].attr == NULL) {
64 ldb->schema.num_attrib_handlers += num_handlers;
70 default function for read/write/canonicalise
72 static int ldb_default_copy(struct ldb_context *ldb,
74 const struct ldb_val *in,
77 *out = ldb_val_dup(mem_ctx, in);
79 if (out->data == NULL && in->data != NULL) {
87 default function for comparison
89 static int ldb_default_cmp(struct ldb_context *ldb,
91 const struct ldb_val *v1,
92 const struct ldb_val *v2)
94 if (v1->length != v2->length) {
95 return v1->length - v2->length;
97 return memcmp(v1->data, v2->data, v1->length);
101 default handler function pointers
103 static const struct ldb_attrib_handler ldb_default_attrib_handler = {
105 .ldif_read_fn = ldb_default_copy,
106 .ldif_write_fn = ldb_default_copy,
107 .canonicalise_fn = ldb_default_copy,
108 .comparison_fn = ldb_default_cmp,
112 return the attribute handlers for a given attribute
114 const struct ldb_attrib_handler *ldb_attrib_handler(struct ldb_context *ldb,
118 const struct ldb_attrib_handler *def = &ldb_default_attrib_handler;
119 /* TODO: should be replaced with a binary search, with a sort on add */
120 for (i=0;i<ldb->schema.num_attrib_handlers;i++) {
121 if (strcmp(ldb->schema.attrib_handlers[i].attr, "*") == 0) {
122 def = &ldb->schema.attrib_handlers[i];
124 if (ldb_attr_cmp(attrib, ldb->schema.attrib_handlers[i].attr) == 0) {
125 return &ldb->schema.attrib_handlers[i];
133 add to the list of ldif handlers for this ldb context
135 void ldb_remove_attrib_handler(struct ldb_context *ldb, const char *attrib)
137 const struct ldb_attrib_handler *h;
139 h = ldb_attrib_handler(ldb, attrib);
140 if (h == &ldb_default_attrib_handler) {
143 if (h->flags & LDB_ATTR_FLAG_ALLOCATED) {
144 talloc_free(discard_const_p(char, h->attr));
146 i = h - ldb->schema.attrib_handlers;
147 if (i < ldb->schema.num_attrib_handlers - 1) {
148 memmove(&ldb->schema.attrib_handlers[i],
149 h+1, sizeof(*h) * (ldb->schema.num_attrib_handlers-(i+1)));
151 ldb->schema.num_attrib_handlers--;
155 setup a attribute handler using a standard syntax
157 int ldb_set_attrib_handler_syntax(struct ldb_context *ldb,
158 const char *attr, const char *syntax)
160 const struct ldb_attrib_handler *h = ldb_attrib_handler_syntax(ldb, syntax);
161 struct ldb_attrib_handler h2;
163 ldb_debug(ldb, LDB_DEBUG_ERROR, "Unknown syntax '%s'\n", syntax);
168 return ldb_set_attrib_handlers(ldb, &h2, 1);
172 setup the attribute handles for well known attributes
174 int ldb_setup_wellknown_attributes(struct ldb_context *ldb)
180 { "dn", LDB_SYNTAX_DN },
181 { "distinguishedName", LDB_SYNTAX_DN },
182 { "cn", LDB_SYNTAX_DIRECTORY_STRING },
183 { "dc", LDB_SYNTAX_DIRECTORY_STRING },
184 { "ou", LDB_SYNTAX_DIRECTORY_STRING },
185 { "objectClass", LDB_SYNTAX_OBJECTCLASS }
188 for (i=0;i<ARRAY_SIZE(wellknown);i++) {
189 if (ldb_set_attrib_handler_syntax(ldb, wellknown[i].attr,
190 wellknown[i].syntax) != 0) {
199 return the list of subclasses for a class
201 const char **ldb_subclass_list(struct ldb_context *ldb, const char *classname)
204 for (i=0;i<ldb->schema.num_classes;i++) {
205 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
206 return (const char **)ldb->schema.classes[i].subclasses;
216 static int ldb_subclass_new(struct ldb_context *ldb, const char *classname, const char *subclass)
218 struct ldb_subclass *s, *c;
219 s = talloc_realloc(ldb, ldb->schema.classes, struct ldb_subclass, ldb->schema.num_classes+1);
220 if (s == NULL) goto failed;
222 ldb->schema.classes = s;
223 c = &s[ldb->schema.num_classes];
224 c->name = talloc_strdup(s, classname);
225 if (c->name == NULL) goto failed;
227 c->subclasses = talloc_array(s, char *, 2);
228 if (c->subclasses == NULL) goto failed;
230 c->subclasses[0] = talloc_strdup(c->subclasses, subclass);
231 if (c->subclasses[0] == NULL) goto failed;
232 c->subclasses[1] = NULL;
234 ldb->schema.num_classes++;
245 int ldb_subclass_add(struct ldb_context *ldb, const char *classname, const char *subclass)
248 struct ldb_subclass *c;
251 for (i=0;i<ldb->schema.num_classes;i++) {
252 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
256 if (i == ldb->schema.num_classes) {
257 return ldb_subclass_new(ldb, classname, subclass);
259 c = &ldb->schema.classes[i];
261 for (n=0;c->subclasses[n];n++) /* noop */;
263 s = talloc_realloc(ldb->schema.classes, c->subclasses, char *, n+2);
270 s[n] = talloc_strdup(s, subclass);
281 remove a set of subclasses for a class
283 void ldb_subclass_remove(struct ldb_context *ldb, const char *classname)
286 struct ldb_subclass *c;
288 for (i=0;i<ldb->schema.num_classes;i++) {
289 if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
293 if (i == ldb->schema.num_classes) {
297 c = &ldb->schema.classes[i];
298 talloc_free(c->name);
299 talloc_free(c->subclasses);
300 if (ldb->schema.num_classes-(i+1) > 0) {
301 memmove(c, c+1, sizeof(*c) * (ldb->schema.num_classes-(i+1)));
303 ldb->schema.num_classes--;
304 if (ldb->schema.num_classes == 0) {
305 talloc_free(ldb->schema.classes);
306 ldb->schema.classes = NULL;