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/*
Unix SMB/CIFS mplementation.
KCC service periodic handling
Copyright (C) Andrew Tridgell 2009
based on repl service code
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "lib/events/events.h"
#include "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "smbd/service.h"
#include "lib/messaging/irpc.h"
#include "dsdb/kcc/kcc_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"
#include "param/param.h"
/*
* add a repsFrom to all our partitions
*/
/*
this is the core of our initial simple KCC
We just add a repsFrom entry for all DCs we find that have nTDSDSA
objects, except for ourselves
*/
static NTSTATUS kccsrv_simple_update(struct kccsrv_service *s, TALLOC_CTX *mem_ctx)
{
struct ldb_result *res;
int ret, i;
const char *attrs[] = { "objectGUID", "invocationID", NULL };
struct ldb_message *msg;
struct ldb_message_element *el;
struct kccsrv_partition *p;
ret = ldb_search(s->samdb, mem_ctx, &res, s->config_dn, LDB_SCOPE_SUBTREE,
attrs, "objectClass=nTDSDSA");
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed nTDSDSA search - %s\n", ldb_errstring(s->samdb)));
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
msg = ldb_msg_new(mem_ctx);
NT_STATUS_HAVE_NO_MEMORY(msg);
ret = ldb_msg_add_empty(msg, "repsFrom", LDB_FLAG_MOD_REPLACE, &el);
if (ret != LDB_SUCCESS) {
return NT_STATUS_NO_MEMORY;
}
for (i=0; i<res->count; i++) {
struct repsFromToBlob r;
struct repsFromTo1 *r1;
struct repsFromTo1OtherInfo oi;
struct GUID ntds_guid, invocation_id;
struct ldb_val v;
enum ndr_err_code ndr_err;
ntds_guid = samdb_result_guid(res->msgs[i], "objectGUID");
if (GUID_compare(&ntds_guid, &s->ntds_guid) == 0) {
/* don't replicate with ourselves */
continue;
}
invocation_id = samdb_result_guid(res->msgs[i], "invocationID");
ZERO_STRUCT(r);
ZERO_STRUCT(oi);
r.version = 1;
r1 = &r.ctr.ctr1;
oi.dns_name = talloc_asprintf(mem_ctx, "%s._msdcs.%s",
GUID_string(mem_ctx, &ntds_guid),
lp_realm(s->task->lp_ctx));
r1->other_info = &oi;
r1->source_dsa_obj_guid = ntds_guid;
r1->source_dsa_invocation_id = invocation_id;
r1->replica_flags =
DRSUAPI_DS_REPLICA_NEIGHBOUR_WRITEABLE |
DRSUAPI_DS_REPLICA_NEIGHBOUR_SYNC_ON_STARTUP |
DRSUAPI_DS_REPLICA_NEIGHBOUR_DO_SCHEDULED_SYNCS;
memset(r1->schedule, 0x11, sizeof(r1->schedule));
ndr_err = ndr_push_struct_blob(&v, mem_ctx,
lp_iconv_convenience(s->task->lp_ctx),
&r,
(ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0,(__location__ ": Failed tp push repsFrom blob\n"));
return NT_STATUS_INTERNAL_ERROR;
}
el->values = talloc_realloc(msg, el->values, struct ldb_val, el->num_values+1);
NT_STATUS_HAVE_NO_MEMORY(el->values);
el->values[el->num_values] = v;
el->num_values++;
}
/* replace the repsFrom on all partitions */
for (p=s->partitions; p; p=p->next) {
msg->dn = p->dn;
ret = ldb_modify(s->samdb, msg);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to store repsFrom for %s - %s\n",
ldb_dn_get_linearized(msg->dn), ldb_errstring(s->samdb)));
return NT_STATUS_INTERNAL_ERROR;
}
}
return NT_STATUS_OK;
}
static void kccsrv_periodic_run(struct kccsrv_service *service);
static void kccsrv_periodic_handler_te(struct tevent_context *ev, struct tevent_timer *te,
struct timeval t, void *ptr)
{
struct kccsrv_service *service = talloc_get_type(ptr, struct kccsrv_service);
WERROR status;
service->periodic.te = NULL;
kccsrv_periodic_run(service);
status = kccsrv_periodic_schedule(service, service->periodic.interval);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(service->task, win_errstr(status));
return;
}
}
WERROR kccsrv_periodic_schedule(struct kccsrv_service *service, uint32_t next_interval)
{
TALLOC_CTX *tmp_mem;
struct tevent_timer *new_te;
struct timeval next_time;
/* prevent looping */
if (next_interval == 0) next_interval = 1;
next_time = timeval_current_ofs(next_interval, 50);
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,
kccsrv_periodic_handler_te, service);
W_ERROR_HAVE_NO_MEMORY(new_te);
tmp_mem = talloc_new(service);
DEBUG(2,("kccsrv_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;
}
static void kccsrv_periodic_run(struct kccsrv_service *service)
{
TALLOC_CTX *mem_ctx;
NTSTATUS status;
DEBUG(2,("kccsrv_periodic_run(): simple update\n"));
mem_ctx = talloc_new(service);
status = kccsrv_simple_update(service, mem_ctx);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("kccsrv_simple_update failed - %s\n", nt_errstr(status)));
}
talloc_free(mem_ctx);
}
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