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/*
Unix SMB/CIFS mplementation.
The module that handles the Domain Naming FSMO Role Owner
checkings
Copyright (C) Stefan Metzmacher 2007
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "lib/ldb/include/ldb_private.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "lib/util/dlinklist.h"
struct dsdb_naming_fsmo {
bool we_are_master;
};
static int naming_fsmo_init(struct ldb_module *module)
{
TALLOC_CTX *mem_ctx;
struct ldb_dn *naming_dn;
struct dsdb_naming_fsmo *naming_fsmo;
struct ldb_result *naming_res;
struct ldb_dn *naming_master_dn;
int ret;
static const char *naming_attrs[] = {
"fSMORoleOwner",
NULL
};
mem_ctx = talloc_new(module);
if (!mem_ctx) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
naming_dn = samdb_partitions_dn(module->ldb, mem_ctx);
if (!naming_dn) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"naming_fsmo_init: no partitions dn present: (skip loading of naming contexts details)\n");
talloc_free(mem_ctx);
return ldb_next_init(module);
}
naming_fsmo = talloc_zero(mem_ctx, struct dsdb_naming_fsmo);
if (!naming_fsmo) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
module->private_data = naming_fsmo;
ret = ldb_search(module->ldb, naming_dn,
LDB_SCOPE_BASE,
NULL, naming_attrs,
&naming_res);
if (ret != LDB_SUCCESS) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"naming_fsmo_init: failed to search the cross-ref container: %d:%s\n",
ret, ldb_strerror(ret));
talloc_free(mem_ctx);
return ret;
}
talloc_steal(mem_ctx, naming_res);
if (naming_res->count == 0) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"naming_fsmo_init: no cross-ref container present: (skip loading of naming contexts details)\n");
talloc_free(mem_ctx);
return ldb_next_init(module);
} else if (naming_res->count > 1) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"naming_fsmo_init: [%u] cross-ref containers found on a base search\n",
naming_res->count);
talloc_free(mem_ctx);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
naming_master_dn = ldb_msg_find_attr_as_dn(module->ldb, mem_ctx, naming_res->msgs[0], "fSMORoleOwner");
if (ldb_dn_compare(samdb_ntds_settings_dn(module->ldb), naming_master_dn) == 0) {
naming_fsmo->we_are_master = true;
} else {
naming_fsmo->we_are_master = false;
}
ldb_debug(module->ldb, LDB_DEBUG_TRACE,
"naming_fsmo_init: we are master: %s\n",
(naming_fsmo->we_are_master?"yes":"no"));
talloc_free(mem_ctx);
return ldb_next_init(module);
}
static const struct ldb_module_ops naming_fsmo_ops = {
.name = "naming_fsmo",
.init_context = naming_fsmo_init
};
int naming_fsmo_module_init(void)
{
return ldb_register_module(&naming_fsmo_ops);
}
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