1 files changed, 121 insertions, 0 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/naming_fsmo.c b/source4/dsdb/samdb/ldb_modules/naming_fsmo.c
new file mode 100644
index 0000000000..9041c37ce7
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/naming_fsmo.c
@@ -0,0 +1,121 @@
+/* 
+   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);
+}