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 "libcli/ldap/ldap.h"
  25 #include "lib/ldb/include/ldb.h"
  26 #include "lib/ldb/include/ldb_errors.h"
  27 #include "smbd/service_task.h"
  28 #include "cldap_server/cldap_server.h"
  29 #include "librpc/gen_ndr/ndr_misc.h"
  30 #include "dsdb/samdb/samdb.h"
  31 #include "ldb_wrap.h"
  32
  33 static void cldapd_rootdse_fill(struct cldapd_server *cldapd,
  34                                 TALLOC_CTX *mem_ctx,
  35                                 struct ldap_SearchRequest *search,
  36                                 struct ldap_SearchResEntry **response,
  37                                 struct ldap_Result *result)
  38 {
  39         struct ldap_SearchResEntry *ent = NULL;
  40         struct ldb_dn *basedn;
  41         struct ldb_result *res = NULL;
  42         struct ldb_request *lreq;
  43         enum ldb_scope scope = LDB_SCOPE_DEFAULT;
  44         const char **attrs = NULL;
  45         const char *errstr = NULL;
  46         int ret = 0;
  47         int ldb_ret = -1;
  48
  49         basedn = ldb_dn_new(mem_ctx, cldapd->samctx, NULL);
  50         if (basedn == NULL) goto nomem;
  51         scope = LDB_SCOPE_BASE;
  52
  53         if (search->num_attributes >= 1) {
  54                 int i;
  55
  56                 attrs = talloc_array(mem_ctx, const char *, search->num_attributes+1);
  57                 if (attrs == NULL) goto nomem;
  58
  59                 for (i=0; i < search->num_attributes; i++) {
  60                         attrs[i] = search->attributes[i];
  61                 }
  62                 attrs[i] = NULL;
  63         }
  64
  65         res = talloc_zero(mem_ctx, struct ldb_result);
  66         if (res == NULL) goto nomem;
  67
  68         ldb_ret = ldb_build_search_req_ex(&lreq, cldapd->samctx, mem_ctx,
  69                                           basedn, scope,
  70                                           search->tree, attrs,
  71                                           NULL,
  72                                           res, ldb_search_default_callback,
  73                                           NULL);
  74
  75         if (ldb_ret != LDB_SUCCESS) {
  76                 goto reply;
  77         }
  78
  79         /* Copy the timeout from the incoming call */
  80         ldb_set_timeout(cldapd->samctx, lreq, search->timelimit);
  81
  82         ldb_ret = ldb_request(cldapd->samctx, lreq);
  83         if (ldb_ret != LDB_SUCCESS) {
  84                 goto reply;
  85         }
  86
  87         ldb_ret = ldb_wait(lreq->handle, LDB_WAIT_ALL);
  88         if (ldb_ret != LDB_SUCCESS) {
  89                 goto reply;
  90         }
  91
  92         if (res->count > 1) {
  93                 errstr = "Internal error: to much replies";
  94                 ldb_ret = LDB_ERR_OTHER;
  95                 goto reply;
  96         } else if (res->count == 1) {
  97                 int j;
  98
  99                 ent = talloc(mem_ctx, struct ldap_SearchResEntry);
 100                 if (ent == NULL) goto nomem;
 101
 102                 ent->dn = ldb_dn_alloc_linearized(ent, res->msgs[0]->dn);
 103                 if (ent->dn == NULL) goto nomem;
 104                 ent->num_attributes = 0;
 105                 ent->attributes = NULL;
 106                 if (res->msgs[0]->num_elements == 0) {
 107                         goto reply;
 108                 }
 109                 ent->num_attributes = res->msgs[0]->num_elements;
 110                 ent->attributes = talloc_array(ent, struct ldb_message_element, ent->num_attributes);
 111                 if (ent->attributes == NULL) goto nomem;
 112                 for (j=0; j < ent->num_attributes; j++) {
 113                         ent->attributes[j].name = talloc_steal(ent->attributes, res->msgs[0]->elements[j].name);
 114                         ent->attributes[j].num_values = 0;
 115                         ent->attributes[j].values = NULL;
 116                         if (search->attributesonly && (res->msgs[0]->elements[j].num_values == 0)) {
 117                                 continue;
 118                         }
 119                         ent->attributes[j].num_values = res->msgs[0]->elements[j].num_values;
 120                         ent->attributes[j].values = res->msgs[0]->elements[j].values;
 121                         talloc_steal(ent->attributes, res->msgs[0]->elements[j].values);
 122                 }
 123         }
 124
 125 reply:
 126         if (ret) {
 127                 /* nothing ... */
 128         } else if (ldb_ret == LDB_SUCCESS) {
 129                 ret = LDAP_SUCCESS;
 130                 errstr = NULL;
 131         } else {
 132                 ret = ldb_ret;
 133                 errstr = ldb_errstring(cldapd->samctx);
 134         }
 135         goto done;
 136 nomem:
 137         talloc_free(ent);
 138         ret = LDAP_OPERATIONS_ERROR;
 139         errstr = "No memory";
 140 done:
 141         *response = ent;
 142         result->resultcode = ret;
 143         result->errormessage = (errstr?talloc_strdup(mem_ctx, errstr):NULL);
 144 }
 145
 146 /*
 147   handle incoming cldap requests
 148 */
 149 void cldapd_rootdse_request(struct cldap_socket *cldap,
 150                             struct cldapd_server *cldapd,
 151                             TALLOC_CTX *tmp_ctx,
 152                             uint32_t message_id,
 153                             struct ldap_SearchRequest *search,
 154                             struct tsocket_address *src)
 155 {
 156         NTSTATUS status;
 157         struct cldap_reply reply;
 158         struct ldap_Result result;
 159
 160         ZERO_STRUCT(result);
 161
 162         reply.messageid         = message_id;
 163         reply.dest              = src;
 164         reply.response          = NULL;
 165         reply.result            = &result;
 166
 167         cldapd_rootdse_fill(cldapd, tmp_ctx, search, &reply.response, reply.result);
 168
 169         status = cldap_reply_send(cldap, &reply);
 170         if (!NT_STATUS_IS_OK(status)) {
 171                 DEBUG(2,("cldap rootdse query failed '%s' - %s\n",
 172                          ldb_filter_from_tree(tmp_ctx, search->tree), nt_errstr(status)));
 173         }
 174
 175         return;
 176 }