source4/dsdb/samdb/ldb_modules/show_deleted.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Simo Sorce  2005
   5    Copyright (C) Stefa Metzmacher <metze@samba.org> 2007
   6
   7      ** NOTE! The following LGPL license applies to the ldb
   8      ** library. This does NOT imply that all of Samba is released
   9      ** under the LGPL
  10
  11    This library is free software; you can redistribute it and/or
  12    modify it under the terms of the GNU Lesser General Public
  13    License as published by the Free Software Foundation; either
  14    version 3 of the License, or (at your option) any later version.
  15
  16    This library is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License for more details.
  20
  21    You should have received a copy of the GNU Lesser General Public
  22    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 /*
  26  *  Name: ldb
  27  *
  28  *  Component: ldb deleted objects control module
  29  *
  30  *  Description: this module hides deleted objects, and returns them if the right control is there
  31  *
  32  *  Author: Stefan Metzmacher
  33  */
  34
  35 #include "includes.h"
  36 #include "ldb/include/ldb.h"
  37 #include "ldb/include/ldb_errors.h"
  38 #include "ldb/include/ldb_private.h"
  39 #include "dsdb/samdb/samdb.h"
  40
  41 /* search */
  42 struct show_deleted_search_request {
  43
  44         struct ldb_module *module;
  45         struct ldb_request *req;
  46 };
  47
  48 static int show_deleted_search_callback(struct ldb_request *req,
  49                                         struct ldb_reply *ares)
  50 {
  51         struct show_deleted_search_request *ar;
  52
  53         ar = talloc_get_type(req->context, struct show_deleted_search_request);
  54
  55         if (!ares) {
  56                 return ldb_module_done(ar->req, NULL, NULL,
  57                                         LDB_ERR_OPERATIONS_ERROR);
  58         }
  59         if (ares->error != LDB_SUCCESS) {
  60                 return ldb_module_done(ar->req, ares->controls,
  61                                         ares->response, ares->error);
  62         }
  63
  64         switch (ares->type) {
  65         case LDB_REPLY_ENTRY:
  66
  67                 return ldb_module_send_entry(ar->req, ares->message, ares->controls);
  68
  69         case LDB_REPLY_REFERRAL:
  70                 return ldb_module_send_referral(ar->req, ares->referral);
  71
  72         case LDB_REPLY_DONE:
  73                 return ldb_module_done(ar->req, ares->controls,
  74                                         ares->response, LDB_SUCCESS);
  75
  76         }
  77         return LDB_SUCCESS;
  78 }
  79
  80 static int show_deleted_search(struct ldb_module *module, struct ldb_request *req)
  81 {
  82         struct ldb_control *control;
  83         struct ldb_control **saved_controls;
  84         struct show_deleted_search_request *ar;
  85         struct ldb_request *down_req;
  86         char *old_filter;
  87         char *new_filter;
  88         int ret;
  89
  90         ar = talloc_zero(req, struct show_deleted_search_request);
  91         if (ar == NULL) {
  92                 return LDB_ERR_OPERATIONS_ERROR;
  93         }
  94         ar->module = module;
  95         ar->req = req;
  96
  97         /* check if there's a show deleted control */
  98         control = ldb_request_get_control(req, LDB_CONTROL_SHOW_DELETED_OID);
  99
 100         if ( ! control) {
 101                 old_filter = ldb_filter_from_tree(ar, req->op.search.tree);
 102                 new_filter = talloc_asprintf(ar, "(&(!(isDeleted=TRUE))%s)",
 103                                                  old_filter);
 104
 105                 ret = ldb_build_search_req(&down_req, module->ldb, ar,
 106                                            req->op.search.base,
 107                                            req->op.search.scope,
 108                                            new_filter,
 109                                            req->op.search.attrs,
 110                                            req->controls,
 111                                            ar, show_deleted_search_callback,
 112                                            req);
 113
 114         } else {
 115                 ret = ldb_build_search_req_ex(&down_req, module->ldb, ar,
 116                                               req->op.search.base,
 117                                               req->op.search.scope,
 118                                               req->op.search.tree,
 119                                               req->op.search.attrs,
 120                                               req->controls,
 121                                               ar, show_deleted_search_callback,
 122                                               req);
 123         }
 124         if (ret != LDB_SUCCESS) {
 125                 return ret;
 126         }
 127
 128         /* if a control is there remove if from the modified request */
 129         if (control && !save_controls(control, down_req, &saved_controls)) {
 130                 return LDB_ERR_OPERATIONS_ERROR;
 131         }
 132
 133         /* perform the search */
 134         return ldb_next_request(module, down_req);
 135 }
 136
 137 static int show_deleted_init(struct ldb_module *module)
 138 {
 139         int ret;
 140
 141         ret = ldb_mod_register_control(module, LDB_CONTROL_SHOW_DELETED_OID);
 142         if (ret != LDB_SUCCESS) {
 143                 ldb_debug(module->ldb, LDB_DEBUG_ERROR,
 144                         "extended_dn: Unable to register control with rootdse!\n");
 145                 return LDB_ERR_OPERATIONS_ERROR;
 146         }
 147
 148         return ldb_next_init(module);
 149 }
 150
 151 _PUBLIC_ const struct ldb_module_ops ldb_show_deleted_module_ops = {
 152         .name              = "show_deleted",
 153         .search            = show_deleted_search,
 154         .init_context      = show_deleted_init
 155 };