source4/wrepl_server/wrepl_periodic.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    WINS Replication server
   5
   6    Copyright (C) Stefan Metzmacher      2005
   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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "dlinklist.h"
  25 #include "lib/events/events.h"
  26 #include "lib/socket/socket.h"
  27 #include "smbd/service_task.h"
  28 #include "smbd/service_stream.h"
  29 #include "lib/messaging/irpc.h"
  30 #include "librpc/gen_ndr/ndr_winsrepl.h"
  31 #include "wrepl_server/wrepl_server.h"
  32 #include "nbt_server/wins/winsdb.h"
  33 #include "ldb/include/ldb.h"
  34 #include "libcli/composite/composite.h"
  35 #include "libcli/wrepl/winsrepl.h"
  36 #include "wrepl_server/wrepl_out_helpers.h"
  37
  38 static NTSTATUS wreplsrv_periodic_run(struct wreplsrv_service *service)
  39 {
  40         NTSTATUS status;
  41
  42         status = wreplsrv_out_pull_run(service);
  43         NT_STATUS_NOT_OK_RETURN(status);
  44
  45         status = wreplsrv_out_push_run(service);
  46         NT_STATUS_NOT_OK_RETURN(status);
  47
  48         return NT_STATUS_OK;
  49 }
  50
  51 static void wreplsrv_periodic_handler_te(struct event_context *ev, struct timed_event *te,
  52                                          struct timeval t, void *ptr)
  53 {
  54         struct wreplsrv_service *service = talloc_get_type(ptr, struct wreplsrv_service);
  55         NTSTATUS status;
  56
  57         service->periodic.te = NULL;
  58
  59         status = wreplsrv_periodic_schedule(service, service->config.periodic_interval);
  60         if (!NT_STATUS_IS_OK(status)) {
  61                 task_server_terminate(service->task, nt_errstr(status));
  62                 return;
  63         }
  64
  65         status = wreplsrv_periodic_run(service);
  66         if (!NT_STATUS_IS_OK(status)) {
  67                 DEBUG(0,("wresrv_periodic_run() failed: %s\n", nt_errstr(status)));
  68         }
  69 }
  70
  71 NTSTATUS wreplsrv_periodic_schedule(struct wreplsrv_service *service, uint32_t next_interval)
  72 {
  73         TALLOC_CTX *tmp_mem;
  74         struct timed_event *new_te;
  75         struct timeval next_time;
  76
  77         /* prevent looping */
  78         if (next_interval == 0) next_interval = 1;
  79
  80         next_time = timeval_current_ofs(next_interval, 5000);
  81
  82         if (service->periodic.te) {
  83                 /*
  84                  * if the timestamp of the new event is higher,
  85                  * as current next we don't need to reschedule
  86                  */
  87                 if (timeval_compare(&next_time, &service->periodic.next_event) > 0) {
  88                         return NT_STATUS_OK;
  89                 }
  90         }
  91
  92         /* reset the next scheduled timestamp */
  93         service->periodic.next_event = next_time;
  94
  95         new_te = event_add_timed(service->task->event_ctx, service,
  96                                  service->periodic.next_event,
  97                                  wreplsrv_periodic_handler_te, service);
  98         NT_STATUS_HAVE_NO_MEMORY(new_te);
  99
 100         tmp_mem = talloc_new(service);
 101         DEBUG(4,("wreplsrv_periodic_schedule(%u) %sscheduled for: %s\n",
 102                 next_interval,
 103                 (service->periodic.te?"re":""),
 104                 nt_time_string(tmp_mem, timeval_to_nttime(&next_time))));
 105         talloc_free(tmp_mem);
 106
 107         talloc_free(service->periodic.te);
 108         service->periodic.te = new_te;
 109
 110         return NT_STATUS_OK;
 111 }
 112
 113 NTSTATUS wreplsrv_setup_periodic(struct wreplsrv_service *service)
 114 {
 115         NTSTATUS status;
 116
 117         status = wreplsrv_periodic_schedule(service, 0);
 118         NT_STATUS_NOT_OK_RETURN(status);
 119
 120         return NT_STATUS_OK;
 121 }