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/*
Unix SMB/CIFS mplementation.
DSDB replication service
Copyright (C) Stefan Metzmacher 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "smbd/service.h"
#include "lib/events/events.h"
#include "lib/messaging/irpc.h"
#include "dsdb/repl/drepl_service.h"
#include "lib/ldb/include/ldb_errors.h"
#include "lib/util/dlinklist.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
static WERROR dreplsrv_init_creds(struct dreplsrv_service *service)
{
NTSTATUS status;
status = auth_system_session_info(service, &service->system_session_info);
if (!NT_STATUS_IS_OK(status)) {
return ntstatus_to_werror(status);
}
return WERR_OK;
}
static WERROR dreplsrv_connect_samdb(struct dreplsrv_service *service)
{
service->samdb = samdb_connect(service, service->system_session_info);
if (!service->samdb) {
return WERR_DS_SERVICE_UNAVAILABLE;
}
return WERR_OK;
}
static void dreplsrv_periodic_handler_te(struct event_context *ev, struct timed_event *te,
struct timeval t, void *ptr)
{
struct dreplsrv_service *service = talloc_get_type(ptr, struct dreplsrv_service);
WERROR status;
service->periodic.te = NULL;
status = dreplsrv_periodic_schedule(service, service->periodic.interval);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(service->task, win_errstr(status));
return;
}
}
WERROR dreplsrv_periodic_schedule(struct dreplsrv_service *service, uint32_t next_interval)
{
TALLOC_CTX *tmp_mem;
struct timed_event *new_te;
struct timeval next_time;
/* prevent looping */
if (next_interval == 0) next_interval = 1;
next_time = timeval_current_ofs(next_interval, 5000);
if (service->periodic.te) {
/*
* if the timestamp of the new event is higher,
* as current next we don't need to reschedule
*/
if (timeval_compare(&next_time, &service->periodic.next_event) > 0) {
return WERR_OK;
}
}
/* reset the next scheduled timestamp */
service->periodic.next_event = next_time;
new_te = event_add_timed(service->task->event_ctx, service,
service->periodic.next_event,
dreplsrv_periodic_handler_te, service);
W_ERROR_HAVE_NO_MEMORY(new_te);
tmp_mem = talloc_new(service);
DEBUG(6,("dreplsrv_periodic_schedule(%u) %sscheduled for: %s\n",
next_interval,
(service->periodic.te?"re":""),
nt_time_string(tmp_mem, timeval_to_nttime(&next_time))));
talloc_free(tmp_mem);
talloc_free(service->periodic.te);
service->periodic.te = new_te;
return WERR_OK;
}
/*
startup the dsdb replicator service task
*/
static void dreplsrv_task_init(struct task_server *task)
{
WERROR status;
struct dreplsrv_service *service;
switch (lp_server_role()) {
case ROLE_STANDALONE:
task_server_terminate(task, "dreplsrv: no DSDB replication required in standalone configuration");
return;
case ROLE_DOMAIN_MEMBER:
task_server_terminate(task, "dreplsrv: no DSDB replication required in domain member configuration");
return;
case ROLE_DOMAIN_CONTROLLER:
/* Yes, we want DSDB replication */
break;
}
task_server_set_title(task, "task[dreplsrv]");
service = talloc_zero(task, struct dreplsrv_service);
if (!service) {
task_server_terminate(task, "dreplsrv_task_init: out of memory");
return;
}
service->task = task;
service->startup_time = timeval_current();
task->private = service;
status = dreplsrv_init_creds(service);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(task, talloc_asprintf(task,
"dreplsrv: Failed to obtain server credentials: %s\n",
win_errstr(status)));
return;
}
status = dreplsrv_connect_samdb(service);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(task, talloc_asprintf(task,
"dreplsrv: Failed to connect to local samdb: %s\n",
win_errstr(status)));
return;
}
service->periodic.interval = 300; /* in seconds */
status = dreplsrv_periodic_schedule(service, service->periodic.interval);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(task, talloc_asprintf(task,
"dreplsrv: Failed to periodic schedule: %s\n",
win_errstr(status)));
return;
}
irpc_add_name(task->msg_ctx, "dreplsrv");
}
/*
initialise the dsdb replicator service
*/
static NTSTATUS dreplsrv_init(struct event_context *event_ctx, const struct model_ops *model_ops)
{
return task_server_startup(event_ctx, model_ops, dreplsrv_task_init);
}
/*
register ourselves as a available server
*/
NTSTATUS server_service_drepl_init(void)
{
return register_server_service("drepl", dreplsrv_init);
}
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