source4/dsdb/samdb/ldb_modules/instancetype.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Simo Sorce  2004-2008
   5    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   6    Copyright (C) Andrew Tridgell 2005
   7    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 /*
  24  *  Name: ldb
  25  *
  26  *  Component: ldb instancetype module
  27  *
  28  *  Description: add an instanceType onto every new record
  29  *
  30  *  Author: Andrew Bartlett
  31  */
  32
  33 #include "includes.h"
  34 #include "ldb.h"
  35 #include "ldb_module.h"
  36 #include "librpc/gen_ndr/ndr_misc.h"
  37 #include "dsdb/samdb/samdb.h"
  38 #include "../libds/common/flags.h"
  39 #include "dsdb/samdb/ldb_modules/util.h"
  40
  41 struct it_context {
  42         struct ldb_module *module;
  43         struct ldb_request *req;
  44         struct ldb_request *add_req;
  45 };
  46
  47 static int it_add_callback(struct ldb_request *req, struct ldb_reply *ares)
  48 {
  49         struct ldb_context *ldb;
  50         struct it_context *ac;
  51
  52         ac = talloc_get_type(req->context, struct it_context);
  53         ldb = ldb_module_get_ctx(ac->module);
  54
  55         if (!ares) {
  56                 return ldb_module_done(ac->req, NULL, NULL,
  57                                         LDB_ERR_OPERATIONS_ERROR);
  58         }
  59
  60         if (ares->error != LDB_SUCCESS) {
  61                 return ldb_module_done(ac->req, ares->controls,
  62                                         ares->response, ares->error);
  63         }
  64
  65         if (ares->type != LDB_REPLY_DONE) {
  66                 ldb_set_errstring(ldb, "Invalid reply type!");
  67                 return ldb_module_done(ac->req, NULL, NULL,
  68                                         LDB_ERR_OPERATIONS_ERROR);
  69         }
  70
  71         /* Add the boilerplate entries */
  72
  73         return ldb_module_done(ac->req, ares->controls,
  74                                ares->response, ares->error);
  75 }
  76
  77 /* add_record: add instancetype attribute */
  78 static int instancetype_add(struct ldb_module *module, struct ldb_request *req)
  79 {
  80         struct ldb_context *ldb;
  81         struct ldb_request *down_req;
  82         struct ldb_message *msg;
  83         struct it_context *ac;
  84         uint32_t instance_type;
  85         int ret;
  86
  87         ldb = ldb_module_get_ctx(module);
  88
  89         ldb_debug(ldb, LDB_DEBUG_TRACE, "instancetype_add_record\n");
  90
  91         /* do not manipulate our control entries */
  92         if (ldb_dn_is_special(req->op.add.message->dn)) {
  93                 return ldb_next_request(module, req);
  94         }
  95
  96         if (ldb_msg_find_element(req->op.add.message, "instanceType")) {
  97                 unsigned int instanceType = ldb_msg_find_attr_as_uint(req->op.add.message, "instanceType", 0);
  98                 if (!(instanceType & INSTANCE_TYPE_IS_NC_HEAD)) {
  99                         return ldb_next_request(module, req);
 100                 }
 101
 102                 /* Forward the 'add' to the modules below, but if it
 103                  * succeeds, then we might need to add the boilerplate
 104                  * entries (lost+found, deleted objects) */
 105                 ac = talloc(req, struct it_context);
 106                 if (ac == NULL) {
 107                         return LDB_ERR_OPERATIONS_ERROR;
 108                 }
 109                 ac->module = module;
 110                 ac->req = req;
 111
 112                 ret = ldb_build_add_req(&ac->add_req, ldb_module_get_ctx(ac->module), ac,
 113                                         ac->req->op.add.message,
 114                                         ac->req->controls,
 115                                         ac, it_add_callback,
 116                                         ac->req);
 117
 118                 if (ret != LDB_SUCCESS) {
 119                         return ret;
 120                 }
 121
 122                 /* Do the original add */
 123                 return ldb_next_request(ac->module, ac->add_req);
 124         }
 125
 126         /* we have to copy the message as the caller might have it as a const */
 127         msg = ldb_msg_copy_shallow(req, req->op.add.message);
 128         if (msg == NULL) {
 129                 ldb_oom(ldb);
 130                 return LDB_ERR_OPERATIONS_ERROR;
 131         }
 132
 133         /*
 134          * TODO: calculate correct instance type
 135          */
 136         instance_type = INSTANCE_TYPE_WRITE;
 137
 138         ret = ldb_msg_add_fmt(msg, "instanceType", "%u", instance_type);
 139         if (ret != LDB_SUCCESS) {
 140                 ldb_oom(ldb);
 141                 return LDB_ERR_OPERATIONS_ERROR;
 142         }
 143
 144         ret = ldb_build_add_req(&down_req, ldb, req,
 145                                 msg,
 146                                 req->controls,
 147                                 req, dsdb_next_callback,
 148                                 req);
 149         if (ret != LDB_SUCCESS) {
 150                 return ret;
 151         }
 152
 153         /* go on with the call chain */
 154         return ldb_next_request(module, down_req);
 155 }
 156
 157 _PUBLIC_ const struct ldb_module_ops ldb_instancetype_module_ops = {
 158         .name          = "instancetype",
 159         .add           = instancetype_add,
 160 };