source3/winbindd/wb_seqnum.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async seqnum
   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 wb_seqnum_state {
  25         uint32_t seqnum;
  26 };
  27
  28 static void wb_seqnum_done(struct tevent_req *subreq);
  29
  30 struct tevent_req *wb_seqnum_send(TALLOC_CTX *mem_ctx,
  31                                   struct tevent_context *ev,
  32                                   struct winbindd_domain *domain)
  33 {
  34         struct tevent_req *req, *subreq;
  35         struct wb_seqnum_state *state;
  36
  37         req = tevent_req_create(mem_ctx, &state, struct wb_seqnum_state);
  38         if (req == NULL) {
  39                 return NULL;
  40         }
  41         subreq = dcerpc_wbint_QuerySequenceNumber_send(
  42                 state, ev, dom_child_handle(domain), &state->seqnum);
  43         if (tevent_req_nomem(subreq, req)) {
  44                 return tevent_req_post(req, ev);
  45         }
  46         tevent_req_set_callback(subreq, wb_seqnum_done, req);
  47         return req;
  48 }
  49
  50 static void wb_seqnum_done(struct tevent_req *subreq)
  51 {
  52         struct tevent_req *req = tevent_req_callback_data(
  53                 subreq, struct tevent_req);
  54         struct wb_seqnum_state *state = tevent_req_data(
  55                 req, struct wb_seqnum_state);
  56         NTSTATUS status, result;
  57
  58         status = dcerpc_wbint_QuerySequenceNumber_recv(subreq, state, &result);
  59         TALLOC_FREE(subreq);
  60         if (any_nt_status_not_ok(status, result, &status)) {
  61                 tevent_req_nterror(req, status);
  62                 return;
  63         }
  64         tevent_req_done(req);
  65 }
  66
  67 NTSTATUS wb_seqnum_recv(struct tevent_req *req, uint32_t *seqnum)
  68 {
  69         struct wb_seqnum_state *state = tevent_req_data(
  70                 req, struct wb_seqnum_state);
  71         NTSTATUS status;
  72
  73         if (tevent_req_is_nterror(req, &status)) {
  74                 return status;
  75         }
  76         *seqnum = state->seqnum;
  77         return NT_STATUS_OK;
  78 }