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/*
ldb database library
Copyright (C) Simo Sorce 2005
Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009
Copyright (C) Matthias Dieter Wallnöfer 2010
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Name: ldb
*
* Component: ldb deleted objects control module
*
* Description: this module hides deleted and recylced objects, and returns
* them if the right control is there
*
* Author: Stefan Metzmacher
*/
#include "includes.h"
#include "ldb/include/ldb_module.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/samdb/ldb_modules/util.h"
static int show_deleted_search(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct ldb_control *show_del, *show_rec;
struct ldb_request *down_req;
struct ldb_parse_tree *new_tree = req->op.search.tree;
int ret;
ldb = ldb_module_get_ctx(module);
/* check if there's a show deleted control */
show_del = ldb_request_get_control(req, LDB_CONTROL_SHOW_DELETED_OID);
/* check if there's a show recycled control */
show_rec = ldb_request_get_control(req, LDB_CONTROL_SHOW_RECYCLED_OID);
if ((show_del == NULL) && (show_rec == NULL)) {
/* Here we have to suppress all deleted objects:
* MS-ADTS 3.1.1.3.4.1
*
* Filter: (&(!(isDeleted=TRUE))(...))
*/
/* FIXME: we could use a constant tree here once we are sure
* that no ldb modules modify trees in-site */
new_tree = talloc(req, struct ldb_parse_tree);
if (!new_tree) {
return ldb_oom(ldb);
}
new_tree->operation = LDB_OP_AND;
new_tree->u.list.num_elements = 2;
new_tree->u.list.elements = talloc_array(new_tree, struct ldb_parse_tree *, 2);
if (!new_tree->u.list.elements) {
return ldb_oom(ldb);
}
new_tree->u.list.elements[0] = talloc(new_tree->u.list.elements, struct ldb_parse_tree);
new_tree->u.list.elements[0]->operation = LDB_OP_NOT;
new_tree->u.list.elements[0]->u.isnot.child =
talloc(new_tree->u.list.elements, struct ldb_parse_tree);
if (!new_tree->u.list.elements[0]->u.isnot.child) {
return ldb_oom(ldb);
}
new_tree->u.list.elements[0]->u.isnot.child->operation = LDB_OP_EQUALITY;
new_tree->u.list.elements[0]->u.isnot.child->u.equality.attr = "isDeleted";
new_tree->u.list.elements[0]->u.isnot.child->u.equality.value = data_blob_string_const("TRUE");
new_tree->u.list.elements[1] = req->op.search.tree;
} else if ((show_del != NULL) && (show_rec == NULL)) {
/* Here we need to suppress all recycled objects:
* MS-ADTS 3.1.1.3.4.1
*
* Filter: (&(!(isRecycled=TRUE))(...))
*/
/* FIXME: we could use a constant tree here once we are sure
* that no ldb modules modify trees in-site */
new_tree = talloc(req, struct ldb_parse_tree);
if (!new_tree) {
return ldb_oom(ldb);
}
new_tree->operation = LDB_OP_AND;
new_tree->u.list.num_elements = 2;
new_tree->u.list.elements = talloc_array(new_tree, struct ldb_parse_tree *, 2);
if (!new_tree->u.list.elements) {
return ldb_oom(ldb);
}
new_tree->u.list.elements[0] = talloc(new_tree->u.list.elements, struct ldb_parse_tree);
new_tree->u.list.elements[0]->operation = LDB_OP_NOT;
new_tree->u.list.elements[0]->u.isnot.child =
talloc(new_tree->u.list.elements, struct ldb_parse_tree);
if (!new_tree->u.list.elements[0]->u.isnot.child) {
return ldb_oom(ldb);
}
new_tree->u.list.elements[0]->u.isnot.child->operation = LDB_OP_EQUALITY;
new_tree->u.list.elements[0]->u.isnot.child->u.equality.attr = "isRecycled";
new_tree->u.list.elements[0]->u.isnot.child->u.equality.value = data_blob_string_const("TRUE");
new_tree->u.list.elements[1] = req->op.search.tree;
}
ret = ldb_build_search_req_ex(&down_req, ldb, req,
req->op.search.base,
req->op.search.scope,
new_tree,
req->op.search.attrs,
req->controls,
req, dsdb_next_callback,
req);
LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
return ret;
}
/* mark the controls as done */
if (show_del != NULL) {
show_del->critical = 0;
}
if (show_rec != NULL) {
show_rec->critical = 0;
}
/* perform the search */
return ldb_next_request(module, down_req);
}
static int show_deleted_init(struct ldb_module *module)
{
struct ldb_context *ldb;
int ret;
ldb = ldb_module_get_ctx(module);
ret = ldb_mod_register_control(module, LDB_CONTROL_SHOW_DELETED_OID);
if (ret != LDB_SUCCESS) {
ldb_debug(ldb, LDB_DEBUG_ERROR,
"show_deleted: Unable to register control with rootdse!\n");
return ldb_operr(ldb);
}
ret = ldb_mod_register_control(module, LDB_CONTROL_SHOW_RECYCLED_OID);
if (ret != LDB_SUCCESS) {
ldb_debug(ldb, LDB_DEBUG_ERROR,
"show_deleted: Unable to register control with rootdse!\n");
return ldb_operr(ldb);
}
return ldb_next_init(module);
}
static const struct ldb_module_ops ldb_show_deleted_module_ops = {
.name = "show_deleted",
.search = show_deleted_search,
.init_context = show_deleted_init
};
int ldb_show_deleted_module_init(const char *version)
{
LDB_MODULE_CHECK_VERSION(version);
return ldb_register_module(&ldb_show_deleted_module_ops);
}
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