4 Copyright (C) Simo Sorce 2004-2006
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
6 Copyright (C) Andrew Tridgell 2005
8 ** NOTE! The following LGPL license applies to the ldb
9 ** library. This does NOT imply that all of Samba is released
12 This library is free software; you can redistribute it and/or
13 modify it under the terms of the GNU Lesser General Public
14 License as published by the Free Software Foundation; either
15 version 3 of the License, or (at your option) any later version.
17 This library is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 Lesser General Public License for more details.
22 You should have received a copy of the GNU Lesser General Public
23 License along with this library; if not, see <http://www.gnu.org/licenses/>.
29 * Component: ldb objectguid module
31 * Description: add a unique objectGUID onto every new record
37 #include "ldb/include/ldb_includes.h"
38 #include "librpc/gen_ndr/ndr_misc.h"
40 static struct ldb_message_element *objectguid_find_attribute(const struct ldb_message *msg, const char *name)
44 for (i = 0; i < msg->num_elements; i++) {
45 if (ldb_attr_cmp(name, msg->elements[i].name) == 0) {
46 return &msg->elements[i];
54 add a time element to a record
56 static int add_time_element(struct ldb_message *msg, const char *attr, time_t t)
58 struct ldb_message_element *el;
61 if (ldb_msg_find_element(msg, attr) != NULL) {
65 s = ldb_timestring(msg, t);
70 if (ldb_msg_add_string(msg, attr, s) != 0) {
74 el = ldb_msg_find_element(msg, attr);
75 /* always set as replace. This works because on add ops, the flag
77 el->flags = LDB_FLAG_MOD_REPLACE;
83 add a uint64_t element to a record
85 static int add_uint64_element(struct ldb_message *msg, const char *attr, uint64_t v)
87 struct ldb_message_element *el;
89 if (ldb_msg_find_element(msg, attr) != NULL) {
93 if (ldb_msg_add_fmt(msg, attr, "%llu", (unsigned long long)v) != 0) {
97 el = ldb_msg_find_element(msg, attr);
98 /* always set as replace. This works because on add ops, the flag
100 el->flags = LDB_FLAG_MOD_REPLACE;
105 /* add_record: add objectGUID attribute */
106 static int objectguid_add(struct ldb_module *module, struct ldb_request *req)
108 struct ldb_request *down_req;
109 struct ldb_message_element *attribute;
110 struct ldb_message *msg;
116 time_t t = time(NULL);
118 ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_add_record\n");
120 /* do not manipulate our control entries */
121 if (ldb_dn_is_special(req->op.add.message->dn)) {
122 return ldb_next_request(module, req);
125 if ((attribute = objectguid_find_attribute(req->op.add.message, "objectGUID")) != NULL ) {
126 return ldb_next_request(module, req);
129 down_req = talloc(req, struct ldb_request);
130 if (down_req == NULL) {
131 return LDB_ERR_OPERATIONS_ERROR;
136 /* we have to copy the message as the caller might have it as a const */
137 down_req->op.add.message = msg = ldb_msg_copy_shallow(down_req, req->op.add.message);
139 talloc_free(down_req);
140 return LDB_ERR_OPERATIONS_ERROR;
144 guid = GUID_random();
146 nt_status = ndr_push_struct_blob(&v, msg, &guid,
147 (ndr_push_flags_fn_t)ndr_push_GUID);
148 if (!NT_STATUS_IS_OK(nt_status)) {
149 talloc_free(down_req);
150 return LDB_ERR_OPERATIONS_ERROR;
153 ret = ldb_msg_add_value(msg, "objectGUID", &v, NULL);
155 talloc_free(down_req);
159 if (add_time_element(msg, "whenCreated", t) != 0 ||
160 add_time_element(msg, "whenChanged", t) != 0) {
161 talloc_free(down_req);
162 return LDB_ERR_OPERATIONS_ERROR;
165 /* Get a sequence number from the backend */
166 ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
167 if (ret == LDB_SUCCESS) {
168 if (add_uint64_element(msg, "uSNCreated", seq_num) != 0 ||
169 add_uint64_element(msg, "uSNChanged", seq_num) != 0) {
170 talloc_free(down_req);
171 return LDB_ERR_OPERATIONS_ERROR;
175 ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
177 /* go on with the call chain */
178 ret = ldb_next_request(module, down_req);
180 /* do not free down_req as the call results may be linked to it,
181 * it will be freed when the upper level request get freed */
182 if (ret == LDB_SUCCESS) {
183 req->handle = down_req->handle;
189 /* modify_record: update timestamps */
190 static int objectguid_modify(struct ldb_module *module, struct ldb_request *req)
192 struct ldb_request *down_req;
193 struct ldb_message *msg;
195 time_t t = time(NULL);
198 ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_add_record\n");
200 /* do not manipulate our control entries */
201 if (ldb_dn_is_special(req->op.add.message->dn)) {
202 return ldb_next_request(module, req);
205 down_req = talloc(req, struct ldb_request);
206 if (down_req == NULL) {
207 return LDB_ERR_OPERATIONS_ERROR;
212 /* we have to copy the message as the caller might have it as a const */
213 down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message);
215 talloc_free(down_req);
216 return LDB_ERR_OPERATIONS_ERROR;
219 if (add_time_element(msg, "whenChanged", t) != 0) {
220 talloc_free(down_req);
221 return LDB_ERR_OPERATIONS_ERROR;
224 /* Get a sequence number from the backend */
225 ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
226 if (ret == LDB_SUCCESS) {
227 if (add_uint64_element(msg, "uSNChanged", seq_num) != 0) {
228 talloc_free(down_req);
229 return LDB_ERR_OPERATIONS_ERROR;
233 ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
235 /* go on with the call chain */
236 ret = ldb_next_request(module, down_req);
238 /* do not free down_req as the call results may be linked to it,
239 * it will be freed when the upper level request get freed */
240 if (ret == LDB_SUCCESS) {
241 req->handle = down_req->handle;
247 static const struct ldb_module_ops objectguid_ops = {
248 .name = "objectguid",
249 .add = objectguid_add,
250 .modify = objectguid_modify,
254 int objectguid_module_init(void)
256 return ldb_register_module(&objectguid_ops);