summaryrefslogtreecommitdiff
path: root/source4/dsdb/samdb/ldb_modules/naming_fsmo.c
blob: 3f4c892b5e5143f7f51b0daed8ddd3f8cf730db8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
/* 
   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 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 "ldb_module.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"
#include "dsdb/samdb/ldb_modules/util.h"

static int naming_fsmo_init(struct ldb_module *module)
{
	struct ldb_context *ldb;
	TALLOC_CTX *mem_ctx;
	struct ldb_dn *naming_dn;
	struct dsdb_naming_fsmo *naming_fsmo;
	struct ldb_result *naming_res;
	int ret;
	static const char *naming_attrs[] = {
		"fSMORoleOwner",
		NULL
	};

	ldb = ldb_module_get_ctx(module);

	mem_ctx = talloc_new(module);
	if (!mem_ctx) {
		return ldb_oom(ldb);
	}

	naming_dn = samdb_partitions_dn(ldb, mem_ctx);
	if (!naming_dn) {
		ldb_debug(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) {
		return ldb_oom(ldb);
	}
	ldb_module_set_private(module, naming_fsmo);

	ret = dsdb_module_search_dn(module, mem_ctx, &naming_res,
				    naming_dn,
				    naming_attrs,
				    DSDB_FLAG_NEXT_MODULE);
	if (ret == LDB_ERR_NO_SUCH_OBJECT) {
		ldb_debug(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->master_dn = ldb_msg_find_attr_as_dn(ldb, naming_fsmo, naming_res->msgs[0], "fSMORoleOwner");
	if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), naming_fsmo->master_dn) == 0) {
		naming_fsmo->we_are_master = true;
	} else {
		naming_fsmo->we_are_master = false;
	}

	if (ldb_set_opaque(ldb, "dsdb_naming_fsmo", naming_fsmo) != LDB_SUCCESS) {
		return ldb_oom(ldb);
	}

	talloc_steal(module, naming_fsmo);

	ldb_debug(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);
}

_PUBLIC_ const struct ldb_module_ops ldb_naming_fsmo_module_ops = {
	.name		= "naming_fsmo",
	.init_context	= naming_fsmo_init
};