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/*
ldb database library
Copyright (C) Simo Sorce 2004
** 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 objectguid module
*
* Description: add a unique objectGUID onto every new record
*
* Author: Simo Sorce
*/
#include "includes.h"
#include "ldb/include/ldb.h"
#include "ldb/include/ldb_private.h"
#include <time.h>
struct private_data {
const char *error_string;
};
static int objectguid_search(struct ldb_module *module, const char *base,
enum ldb_scope scope, const char *expression,
const char * const *attrs, struct ldb_message ***res)
{
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_search\n");
return ldb_next_search(module, base, scope, expression, attrs, res);
}
static int objectguid_search_bytree(struct ldb_module *module, const char *base,
enum ldb_scope scope, struct ldb_parse_tree *tree,
const char * const *attrs, struct ldb_message ***res)
{
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_search\n");
return ldb_next_search_bytree(module, base, scope, tree, attrs, res);
}
static struct ldb_message_element *objectguid_find_attribute(const struct ldb_message *msg, const char *name)
{
int i;
for (i = 0; i < msg->num_elements; i++) {
if (ldb_attr_cmp(name, msg->elements[i].name) == 0) {
return &msg->elements[i];
}
}
return NULL;
}
/* add_record: add crateTimestamp/modifyTimestamp attributes */
static int objectguid_add_record(struct ldb_module *module, const struct ldb_message *msg)
{
struct ldb_message *msg2;
struct ldb_message_element *attribute;
struct GUID guid;
char *guidstr;
int ret, i;
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_add_record\n");
if (msg->dn[0] == '@') { /* do not manipulate our control entries */
return ldb_next_add_record(module, msg);
}
if ((attribute = objectguid_find_attribute(msg, "objectGUID")) != NULL ) {
return ldb_next_add_record(module, msg);
}
msg2 = talloc(module, struct ldb_message);
if (!msg2) {
return -1;
}
msg2->dn = msg->dn;
msg2->num_elements = msg->num_elements;
msg2->private_data = msg->private_data;
msg2->elements = talloc_array(msg2, struct ldb_message_element, msg2->num_elements);
for (i = 0; i < msg2->num_elements; i++) {
msg2->elements[i] = msg->elements[i];
}
/* a new GUID */
guid = GUID_random();
guidstr = GUID_string(msg2, &guid);
if (!guidstr) {
return -1;
}
if (ldb_msg_add_string(module->ldb, msg2, "objectGUID", guidstr) != 0) {
return -1;
}
ret = ldb_next_add_record(module, msg2);
talloc_free(msg2);
return ret;
}
/* modify_record: change modifyTimestamp as well */
static int objectguid_modify_record(struct ldb_module *module, const struct ldb_message *msg)
{
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_modify_record\n");
return ldb_next_modify_record(module, msg);
}
static int objectguid_delete_record(struct ldb_module *module, const char *dn)
{
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_delete_record\n");
return ldb_next_delete_record(module, dn);
}
static int objectguid_rename_record(struct ldb_module *module, const char *olddn, const char *newdn)
{
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_rename_record\n");
return ldb_next_rename_record(module, olddn, newdn);
}
static int objectguid_lock(struct ldb_module *module, const char *lockname)
{
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_lock\n");
return ldb_next_named_lock(module, lockname);
}
static int objectguid_unlock(struct ldb_module *module, const char *lockname)
{
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_unlock\n");
return ldb_next_named_unlock(module, lockname);
}
/* return extended error information */
static const char *objectguid_errstring(struct ldb_module *module)
{
struct private_data *data = (struct private_data *)module->private_data;
ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_errstring\n");
if (data->error_string) {
const char *error;
error = data->error_string;
data->error_string = NULL;
return error;
}
return ldb_next_errstring(module);
}
static int objectguid_destructor(void *module_ctx)
{
/* struct ldb_module *ctx = module_ctx; */
/* put your clean-up functions here */
return 0;
}
static const struct ldb_module_ops objectguid_ops = {
.name = "objectguid",
.search = objectguid_search,
.search_bytree = objectguid_search_bytree,
.add_record = objectguid_add_record,
.modify_record = objectguid_modify_record,
.delete_record = objectguid_delete_record,
.rename_record = objectguid_rename_record,
.named_lock = objectguid_lock,
.named_unlock = objectguid_unlock,
.errstring = objectguid_errstring
};
/* the init function */
#ifdef HAVE_DLOPEN_DISABLED
struct ldb_module *init_module(struct ldb_context *ldb, const char *options[])
#else
struct ldb_module *objectguid_module_init(struct ldb_context *ldb, const char *options[])
#endif
{
struct ldb_module *ctx;
struct private_data *data;
ctx = talloc(ldb, struct ldb_module);
if (!ctx)
return NULL;
data = talloc(ctx, struct private_data);
if (!data) {
talloc_free(ctx);
return NULL;
}
data->error_string = NULL;
ctx->private_data = data;
ctx->ldb = ldb;
ctx->prev = ctx->next = NULL;
ctx->ops = &objectguid_ops;
talloc_set_destructor (ctx, objectguid_destructor);
return ctx;
}
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