source4/cldap_server/rootdse.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    CLDAP server - rootdse handling
   5
   6    Copyright (C) Stefan Metzmacher      2006
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include <tevent.h>
  24 #include <ldb.h>
  25 #include <ldb_errors.h>
  26 #include "smbd/service_task.h"
  27 #include "cldap_server/cldap_server.h"
  28 #include "librpc/gen_ndr/ndr_misc.h"
  29 #include "dsdb/samdb/samdb.h"
  30 #include "ldb_wrap.h"
  31
  32 static void cldapd_rootdse_fill(struct cldapd_server *cldapd,
  33                                 TALLOC_CTX *mem_ctx,
  34                                 struct ldap_SearchRequest *search,
  35                                 struct ldap_SearchResEntry **response,
  36                                 struct ldap_Result *result)
  37 {
  38         struct ldap_SearchResEntry *ent = NULL;
  39         struct ldb_result *res = NULL;
  40         struct ldb_request *lreq;
  41         const char **attrs = NULL;
  42         const char *errstr = NULL;
  43         int ret = LDAP_SUCCESS, ldb_ret;
  44
  45         if (search->num_attributes >= 1) {
  46                 int i;
  47
  48                 attrs = talloc_array(mem_ctx, const char *, search->num_attributes+1);
  49                 if (attrs == NULL) goto nomem;
  50
  51                 for (i=0; i < search->num_attributes; i++) {
  52                         attrs[i] = search->attributes[i];
  53                 }
  54                 attrs[i] = NULL;
  55         }
  56
  57         res = talloc_zero(mem_ctx, struct ldb_result);
  58         if (res == NULL) goto nomem;
  59
  60         ldb_ret = ldb_build_search_req_ex(&lreq, cldapd->samctx, mem_ctx,
  61                                           NULL, LDB_SCOPE_BASE,
  62                                           search->tree, attrs,
  63                                           NULL,
  64                                           res, ldb_search_default_callback,
  65                                           NULL);
  66
  67         if (ldb_ret != LDB_SUCCESS) {
  68                 goto reply;
  69         }
  70
  71         /* Copy the timeout from the incoming call */
  72         ldb_set_timeout(cldapd->samctx, lreq, search->timelimit);
  73
  74         ldb_ret = ldb_request(cldapd->samctx, lreq);
  75         if (ldb_ret != LDB_SUCCESS) {
  76                 goto reply;
  77         }
  78
  79         ldb_ret = ldb_wait(lreq->handle, LDB_WAIT_ALL);
  80         if (ldb_ret != LDB_SUCCESS) {
  81                 goto reply;
  82         }
  83
  84         if (res->count > 1) {
  85                 errstr = "Internal error: to much replies";
  86                 ldb_ret = LDB_ERR_OTHER;
  87                 goto reply;
  88         } else if (res->count == 1) {
  89                 int j;
  90
  91                 ent = talloc(mem_ctx, struct ldap_SearchResEntry);
  92                 if (ent == NULL) goto nomem;
  93
  94                 ent->dn = ldb_dn_alloc_linearized(ent, res->msgs[0]->dn);
  95                 if (ent->dn == NULL) goto nomem;
  96                 ent->num_attributes = 0;
  97                 ent->attributes = NULL;
  98                 if (res->msgs[0]->num_elements == 0) {
  99                         goto reply;
 100                 }
 101                 ent->num_attributes = res->msgs[0]->num_elements;
 102                 ent->attributes = talloc_array(ent, struct ldb_message_element,
 103                                                ent->num_attributes);
 104                 if (ent->attributes == NULL) goto nomem;
 105                 for (j=0; j < ent->num_attributes; j++) {
 106                         ent->attributes[j].name = talloc_steal(ent->attributes,
 107                                                                res->msgs[0]->elements[j].name);
 108                         ent->attributes[j].num_values = 0;
 109                         ent->attributes[j].values = NULL;
 110                         if (search->attributesonly && (res->msgs[0]->elements[j].num_values == 0)) {
 111                                 continue;
 112                         }
 113                         ent->attributes[j].num_values = res->msgs[0]->elements[j].num_values;
 114                         ent->attributes[j].values = res->msgs[0]->elements[j].values;
 115                         talloc_steal(ent->attributes, res->msgs[0]->elements[j].values);
 116                 }
 117         }
 118
 119 reply:
 120         if (ret != LDAP_SUCCESS) {
 121                 /* nothing ... */
 122         } else if (ldb_ret == LDB_SUCCESS) {
 123                 ret = LDAP_SUCCESS;
 124                 errstr = NULL;
 125         } else {
 126                 ret = ldb_ret;
 127                 errstr = ldb_errstring(cldapd->samctx);
 128         }
 129         goto done;
 130 nomem:
 131         talloc_free(ent);
 132         ret = LDAP_OPERATIONS_ERROR;
 133         errstr = "No memory";
 134 done:
 135         *response = ent;
 136         result->resultcode = ret;
 137         result->errormessage = (errstr?talloc_strdup(mem_ctx, errstr):NULL);
 138 }
 139
 140 /*
 141   handle incoming cldap requests
 142 */
 143 void cldapd_rootdse_request(struct cldap_socket *cldap,
 144                             struct cldapd_server *cldapd,
 145                             TALLOC_CTX *tmp_ctx,
 146                             uint32_t message_id,
 147                             struct ldap_SearchRequest *search,
 148                             struct tsocket_address *src)
 149 {
 150         NTSTATUS status;
 151         struct cldap_reply reply;
 152         struct ldap_Result result;
 153
 154         ZERO_STRUCT(result);
 155
 156         reply.messageid         = message_id;
 157         reply.dest              = src;
 158         reply.response          = NULL;
 159         reply.result            = &result;
 160
 161         /* Note: The remoteAddress should rather be set on a ldb request.
 162          * We can set this savely on the context here,
 163          * since cldapd_rootdse_fill operates synchronously. */
 164         ldb_set_opaque(cldapd->samctx, "remoteAddress", src);
 165
 166         cldapd_rootdse_fill(cldapd, tmp_ctx, search, &reply.response,
 167                             reply.result);
 168
 169         /*
 170          * We clear this after cldapd_rootdse_fill as this is shared ldb
 171          * and if it was not cleared the audit logging would report changes
 172          * made by internal processes as coming from the last cldap requester
 173          */
 174         ldb_set_opaque(cldapd->samctx, "remoteAddress", NULL);
 175
 176         status = cldap_reply_send(cldap, &reply);
 177         if (!NT_STATUS_IS_OK(status)) {
 178                 DEBUG(2,("cldap rootdse query failed '%s' - %s\n",
 179                          ldb_filter_from_tree(tmp_ctx, search->tree), nt_errstr(status)));
 180         }
 181
 182         return;
 183 }