source3/winbindd/wb_dsgetdcname.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async dsgetdcname
   4    Copyright (C) Volker Lendecke 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "winbindd.h"
  22 #include "librpc/gen_ndr/ndr_winbind_c.h"
  23
  24 struct wb_dsgetdcname_state {
  25         struct netr_DsRGetDCNameInfo *dcinfo;
  26 };
  27
  28 static void wb_dsgetdcname_done(struct tevent_req *subreq);
  29
  30 struct tevent_req *wb_dsgetdcname_send(TALLOC_CTX *mem_ctx,
  31                                        struct tevent_context *ev,
  32                                        const char *domain_name,
  33                                        const struct GUID *domain_guid,
  34                                        const char *site_name,
  35                                        uint32_t flags)
  36 {
  37         struct tevent_req *req, *subreq;
  38         struct wb_dsgetdcname_state *state;
  39         struct winbindd_child *child;
  40         struct GUID guid;
  41         struct GUID *guid_ptr = NULL;
  42
  43         req = tevent_req_create(mem_ctx, &state, struct wb_dsgetdcname_state);
  44         if (req == NULL) {
  45                 return NULL;
  46         }
  47
  48         if (strequal(domain_name, "BUILTIN")) {
  49                 /*
  50                  * This makes no sense
  51                  */
  52                 tevent_req_nterror(req, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND);
  53                 return tevent_req_post(req, ev);
  54         }
  55
  56         if (strequal(domain_name, get_global_sam_name())) {
  57                 int role = lp_server_role();
  58                 if ( role != ROLE_ACTIVE_DIRECTORY_DC ) {
  59                         /*
  60                          * Two options here: Give back our own address, or say there's
  61                          * nobody around. Right now opting for the latter, one measure
  62                          * to prevent the loopback connects. This might change if
  63                          * needed.
  64                          */
  65                         tevent_req_nterror(req, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND);
  66                         return tevent_req_post(req, ev);
  67                 }
  68         }
  69
  70         if (IS_DC) {
  71                 /*
  72                  * We have to figure out the DC ourselves
  73                  */
  74                 child = locator_child();
  75         } else {
  76                 struct winbindd_domain *domain = find_our_domain();
  77                 child = choose_domain_child(domain);
  78         }
  79
  80         if (domain_guid != NULL) {
  81                 /* work around a const issue in rpccli_ autogenerated code */
  82                 guid = *domain_guid;
  83                 guid_ptr = &guid;
  84         }
  85
  86         subreq = dcerpc_wbint_DsGetDcName_send(
  87                 state, ev, child->binding_handle, domain_name, guid_ptr, site_name,
  88                 flags, &state->dcinfo);
  89         if (tevent_req_nomem(subreq, req)) {
  90                 return tevent_req_post(req, ev);
  91         }
  92         tevent_req_set_callback(subreq, wb_dsgetdcname_done, req);
  93         return req;
  94 }
  95
  96 static void wb_dsgetdcname_done(struct tevent_req *subreq)
  97 {
  98         struct tevent_req *req = tevent_req_callback_data(
  99                 subreq, struct tevent_req);
 100         struct wb_dsgetdcname_state *state = tevent_req_data(
 101                 req, struct wb_dsgetdcname_state);
 102         NTSTATUS status, result;
 103
 104         status = dcerpc_wbint_DsGetDcName_recv(subreq, state, &result);
 105         TALLOC_FREE(subreq);
 106         if (any_nt_status_not_ok(status, result, &status)) {
 107                 tevent_req_nterror(req, status);
 108                 return;
 109         }
 110         tevent_req_done(req);
 111 }
 112
 113 NTSTATUS wb_dsgetdcname_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 114                              struct netr_DsRGetDCNameInfo **pdcinfo)
 115 {
 116         struct wb_dsgetdcname_state *state = tevent_req_data(
 117                 req, struct wb_dsgetdcname_state);
 118         NTSTATUS status;
 119
 120         if (tevent_req_is_nterror(req, &status)) {
 121                 return status;
 122         }
 123         *pdcinfo = talloc_move(mem_ctx, &state->dcinfo);
 124         return NT_STATUS_OK;
 125 }