source3/winbindd/winbindd_ping_dc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_PING_DC
   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_wbint_c.h"
  23
  24 struct winbindd_ping_dc_state {
  25         const char *dcname;
  26         NTSTATUS result;
  27 };
  28
  29 static void winbindd_ping_dc_done(struct tevent_req *subreq);
  30
  31 struct tevent_req *winbindd_ping_dc_send(TALLOC_CTX *mem_ctx,
  32                                          struct tevent_context *ev,
  33                                          struct winbindd_cli_state *cli,
  34                                          struct winbindd_request *request)
  35 {
  36         struct tevent_req *req, *subreq;
  37         struct winbindd_ping_dc_state *state;
  38         struct winbindd_domain *domain;
  39
  40         req = tevent_req_create(mem_ctx, &state,
  41                                 struct winbindd_ping_dc_state);
  42         if (req == NULL) {
  43                 return NULL;
  44         }
  45
  46         if (request->domain_name[0] == '\0') {
  47                 /* preserve old behavior, when no domain name is given */
  48                 domain = find_our_domain();
  49         } else {
  50                 domain = find_domain_from_name(request->domain_name);
  51         }
  52         if (domain == NULL) {
  53                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_DOMAIN);
  54                 return tevent_req_post(req, ev);
  55         }
  56         if (domain->internal) {
  57                 /*
  58                  * Internal domains are passdb based, we can always
  59                  * contact them.
  60                  */
  61                 tevent_req_done(req);
  62                 return tevent_req_post(req, ev);
  63         }
  64
  65         subreq = dcerpc_wbint_PingDc_send(state, ev, dom_child_handle(domain),
  66                                           &state->dcname);
  67         if (tevent_req_nomem(subreq, req)) {
  68                 return tevent_req_post(req, ev);
  69         }
  70         tevent_req_set_callback(subreq, winbindd_ping_dc_done, req);
  71         return req;
  72 }
  73
  74 static void winbindd_ping_dc_done(struct tevent_req *subreq)
  75 {
  76         struct tevent_req *req = tevent_req_callback_data(
  77                 subreq, struct tevent_req);
  78         struct winbindd_ping_dc_state *state = tevent_req_data(
  79                 req, struct winbindd_ping_dc_state);
  80         NTSTATUS status, result;
  81
  82         status = dcerpc_wbint_PingDc_recv(subreq, state, &result);
  83         state->result = result;
  84         if (any_nt_status_not_ok(status, result, &status)) {
  85                 tevent_req_nterror(req, status);
  86                 return;
  87         }
  88         tevent_req_done(req);
  89 }
  90
  91 NTSTATUS winbindd_ping_dc_recv(struct tevent_req *req,
  92                                struct winbindd_response *presp)
  93 {
  94         struct winbindd_ping_dc_state *state = tevent_req_data(
  95                 req, struct winbindd_ping_dc_state);
  96
  97         if (!NT_STATUS_IS_OK(state->result)) {
  98                 set_auth_errors(presp, state->result);
  99         }
 100
 101         if (state->dcname) {
 102                 presp->extra_data.data = talloc_strdup(presp, state->dcname);
 103                 presp->length += strlen((char *)presp->extra_data.data) + 1;
 104         }
 105
 106         return tevent_req_simple_recv_ntstatus(req);
 107 }