From cc6c3eb38c267c7a1f0087bcfdccc01e2164134f Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Wed, 17 Jan 2007 23:58:14 +0000
Subject: r20867: add modules to handle the domain naming and the pdc FSMO
 Roles

metze
(This used to be commit 341fae8e8465e67023ab0e82110835669a593577)
---
 source4/dsdb/samdb/ldb_modules/pdc_fsmo.c | 120 ++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 source4/dsdb/samdb/ldb_modules/pdc_fsmo.c

(limited to 'source4/dsdb/samdb/ldb_modules/pdc_fsmo.c')

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..16b40ef8d9
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/pdc_fsmo.c
@@ -0,0 +1,120 @@
+/* 
+   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 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_pdc_fsmo {
+	bool we_are_master;
+};
+
+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;
+	struct ldb_dn *pdc_master_dn;
+	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_SUCCESS) {
+		ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
+			      "pdc_fsmo_init: failed to search the domain object: %d:%s\n",
+			      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\n",
+			      pdc_res->count);
+		talloc_free(mem_ctx);
+		return LDB_ERR_CONSTRAINT_VIOLATION;
+	}
+
+	pdc_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_master_dn) == 0) {
+		pdc_fsmo->we_are_master = true;
+	} else {
+		pdc_fsmo->we_are_master = false;
+	}
+
+	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);
+}
+
+static const struct ldb_module_ops pdc_fsmo_ops = {
+	.name		= "pdc_fsmo",
+	.init_context	= pdc_fsmo_init
+};
+
+int pdc_fsmo_module_init(void)
+{
+	return ldb_register_module(&pdc_fsmo_ops);
+}
-- 
cgit