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/*
ldb database library
Copyright (C) Simo Sorce 2005
** NOTE! The following LGPL license applies to the ldb
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Name: ldb
*
* Component: ldb attribute scoped query control module
*
* Description: this module searches all the the objects pointed
* by the DNs contained in the references attribute
*
* Author: Simo Sorce
*/
#include "includes.h"
#include "ldb/include/includes.h"
#define ASQ_CTRL_SUCCESS 0
#define ASQ_CTRL_INVALID_ATTRIBUTE_SYNTAX 21
#define ASQ_CTRL_UNWILLING_TO_PERFORM 53
#define ASQ_CTRL_AFFECTS_MULTIPLE_DSA 71
static int build_response(struct ldb_result *res, int result)
{
struct ldb_asq_control *asq;
int i;
if (res->controls) {
for (i = 0; res->controls[i]; i++);
res->controls = talloc_realloc(res, res->controls, struct ldb_control *, i + 2);
} else {
i = 0;
res->controls = talloc_array(res, struct ldb_control *, 2);
}
if (res->controls == NULL)
return LDB_ERR_OPERATIONS_ERROR;
res->controls[i] = talloc(res->controls, struct ldb_control);
if (res->controls[i] == NULL)
return LDB_ERR_OPERATIONS_ERROR;
res->controls[i]->oid = LDB_CONTROL_ASQ_OID;
res->controls[i]->critical = 0;
asq = talloc_zero(res->controls[i], struct ldb_asq_control);
if (asq == NULL)
return LDB_ERR_OPERATIONS_ERROR;
asq->result = result;
res->controls[i]->data = asq;
res->controls[i + 1] = NULL;
return LDB_SUCCESS;
}
/* search */
static int asq_search(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_control *control;
struct ldb_asq_control *asq_ctrl;
struct ldb_request *base_req;
struct ldb_message_element *el;
struct ldb_result *res;
char **base_attrs;
int i, c, ret;
/* check if there's a paged request control */
control = get_control_from_list(req->controls, LDB_CONTROL_ASQ_OID);
if (control == NULL) {
/* not found go on */
return ldb_next_request(module, req);
}
/* pre-allocate a clean result structure */
req->op.search.res = res = talloc_zero(req, struct ldb_result);
if (res == NULL)
return LDB_ERR_OPERATIONS_ERROR;
/* check the search is well formed */
if (req->op.search.scope != LDB_SCOPE_BASE) {
return build_response(res, ASQ_CTRL_UNWILLING_TO_PERFORM);
}
asq_ctrl = talloc_get_type(control->data, struct ldb_asq_control);
/* get the object to retrieve the DNs to search */
base_req = talloc_zero(req, struct ldb_request);
if (base_req == NULL)
return LDB_ERR_OPERATIONS_ERROR;
base_req->operation = LDB_REQ_SEARCH;
base_req->op.search.base = req->op.search.base;
base_req->op.search.scope = LDB_SCOPE_BASE;
base_req->op.search.tree = req->op.search.tree;
base_attrs = talloc_array(base_req, char *, 2);
if (base_attrs == NULL)
return LDB_ERR_OPERATIONS_ERROR;
base_attrs[0] = talloc_strdup(base_attrs, asq_ctrl->source_attribute);
if (base_attrs[0] == NULL)
return LDB_ERR_OPERATIONS_ERROR;
base_attrs[1] = NULL;
base_req->op.search.attrs = (const char * const *)base_attrs;
base_req->creds = req->creds;
ret = ldb_request(module->ldb, base_req);
if (ret != LDB_SUCCESS) {
talloc_free(base_req);
return ret;
}
if (base_req->op.search.res->count == 0) {
talloc_free(base_req);
return build_response(res, ASQ_CTRL_SUCCESS);
}
/* look up the DNs */
el = ldb_msg_find_element(base_req->op.search.res->msgs[0],
asq_ctrl->source_attribute);
/* no values found */
if (el == NULL) {
talloc_free(base_req);
return build_response(res, ASQ_CTRL_SUCCESS);
}
for (i = 0, c = 0; i < el->num_values; i++) {
struct ldb_request *exp_req;
exp_req = talloc_zero(req, struct ldb_request);
if (exp_req == NULL)
return LDB_ERR_OPERATIONS_ERROR;
exp_req->operation = LDB_REQ_SEARCH;
exp_req->op.search.base = ldb_dn_explode(exp_req, (const char *)el->values[i].data);
if (exp_req->op.search.base == NULL) {
return build_response(res, ASQ_CTRL_INVALID_ATTRIBUTE_SYNTAX);
}
exp_req->op.search.scope = LDB_SCOPE_BASE;
exp_req->op.search.tree = req->op.search.tree;
exp_req->op.search.attrs = req->op.search.attrs;
exp_req->creds = req->creds;
ret = ldb_request(module->ldb, exp_req);
if (ret != LDB_SUCCESS)
return ret;
if (exp_req->op.search.res && exp_req->op.search.res->count != 0) {
if (res->msgs == NULL) {
res->msgs = talloc_array(res,
struct ldb_message *, 2);
} else {
res->msgs = talloc_realloc(res, res->msgs,
struct ldb_message *, c + 2);
}
if (res->msgs == NULL)
return LDB_ERR_OPERATIONS_ERROR;
res->msgs[c] = talloc_steal(res->msgs, exp_req->op.search.res->msgs[0]);
c++;
}
if (res->msgs) {
res->msgs[c] = NULL;
res->count = c;
}
talloc_free(exp_req);
}
talloc_free(base_req);
return build_response(res, ASQ_CTRL_SUCCESS);
}
static int asq(struct ldb_module *module, struct ldb_request *req)
{
switch (req->operation) {
case LDB_REQ_SEARCH:
return asq_search(module, req);
default:
return ldb_next_request(module, req);
}
}
static int asq_init_2(struct ldb_module *module)
{
struct ldb_request request;
int ret;
request.operation = LDB_REQ_REGISTER;
request.op.reg.oid = LDB_CONTROL_ASQ_OID;
request.controls = NULL;
ret = ldb_request(module->ldb, &request);
if (ret != LDB_SUCCESS) {
ldb_debug(module->ldb, LDB_DEBUG_ERROR, "asq: Unable to register control with rootdse!\n");
return LDB_ERR_OTHER;
}
return ldb_next_second_stage_init(module);
}
static const struct ldb_module_ops asq_ops = {
.name = "asq",
.request = asq,
.second_stage_init = asq_init_2
};
struct ldb_module *asq_module_init(struct ldb_context *ldb, const char *options[])
{
struct ldb_module *ctx;
ctx = talloc(ldb, struct ldb_module);
if (!ctx)
return NULL;
ctx->ldb = ldb;
ctx->prev = ctx->next = NULL;
ctx->ops = &asq_ops;
ctx->private_data = NULL;
return ctx;
}
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