1 files changed, 121 insertions, 0 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/pdc_fsmo.c b/source4/dsdb/samdb/ldb_modules/pdc_fsmo.c
new file mode 100644
index 0000000000..09d56d77c9
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/pdc_fsmo.c
@@ -0,0 +1,121 @@
+/* 
+   Unix SMB/CIFS mplementation.
+
+   The module that handles the PDC 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 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/>.
+   
+*/
+
+#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"
+
+static int pdc_fsmo_init(struct ldb_module *module)
+{
+	TALLOC_CTX *mem_ctx;
+	struct ldb_dn *pdc_dn;
+	struct dsdb_pdc_fsmo *pdc_fsmo;
+	struct ldb_result *pdc_res;
+	int ret;
+	static const char *pdc_attrs[] = {
+		"fSMORoleOwner",
+		NULL
+	};
+
+	mem_ctx = talloc_new(module);
+	if (!mem_ctx) {
+		ldb_oom(module->ldb);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	pdc_dn = samdb_base_dn(module->ldb);
+	if (!pdc_dn) {
+		ldb_debug(module->ldb, LDB_DEBUG_WARNING,
+			  "pdc_fsmo_init: no domain dn present: (skip loading of domain details)\n");
+		talloc_free(mem_ctx);
+		return ldb_next_init(module);
+	}
+
+	pdc_fsmo = talloc_zero(mem_ctx, struct dsdb_pdc_fsmo);
+	if (!pdc_fsmo) {
+		ldb_oom(module->ldb);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	module->private_data = pdc_fsmo;
+
+	ret = ldb_search(module->ldb, pdc_dn,
+			 LDB_SCOPE_BASE,
+			 NULL, pdc_attrs,
+			 &pdc_res);
+	if (ret == LDB_ERR_NO_SUCH_OBJECT) {
+		ldb_debug(module->ldb, LDB_DEBUG_WARNING,
+			  "pdc_fsmo_init: no domain object present: (skip loading of domain details)\n");
+		talloc_free(mem_ctx);
+		return ldb_next_init(module);
+	} else if (ret != LDB_SUCCESS) {
+		ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
+			      "pdc_fsmo_init: failed to search the domain object: %d:%s",
+			      ret, ldb_strerror(ret));
+		talloc_free(mem_ctx);
+		return ret;
+	}
+	talloc_steal(mem_ctx, pdc_res);
+	if (pdc_res->count == 0) {
+		ldb_debug(module->ldb, LDB_DEBUG_WARNING,
+			  "pdc_fsmo_init: no domain object present: (skip loading of domain details)\n");
+		talloc_free(mem_ctx);
+		return ldb_next_init(module);
+	} else if (pdc_res->count > 1) {
+		ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
+			      "pdc_fsmo_init: [%u] domain objects found on a base search",
+			      pdc_res->count);
+		talloc_free(mem_ctx);
+		return LDB_ERR_CONSTRAINT_VIOLATION;
+	}
+
+	pdc_fsmo->master_dn = ldb_msg_find_attr_as_dn(module->ldb, mem_ctx, pdc_res->msgs[0], "fSMORoleOwner");
+	if (ldb_dn_compare(samdb_ntds_settings_dn(module->ldb), pdc_fsmo->master_dn) == 0) {
+		pdc_fsmo->we_are_master = true;
+	} else {
+		pdc_fsmo->we_are_master = false;
+	}
+
+	if (ldb_set_opaque(module->ldb, "dsdb_pdc_fsmo", pdc_fsmo) != LDB_SUCCESS) {
+		ldb_oom(module->ldb);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	talloc_steal(module, pdc_fsmo);
+
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE,
+			  "pdc_fsmo_init: we are master: %s\n",
+			  (pdc_fsmo->we_are_master?"yes":"no"));
+
+	talloc_free(mem_ctx);
+	return ldb_next_init(module);
+}
+
+_PUBLIC_ const struct ldb_module_ops ldb_pdc_fsmo_module_ops = {
+	.name		= "pdc_fsmo",
+	.init_context	= pdc_fsmo_init
+};