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/*
Unix SMB/CIFS mplementation.
KCC service
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 "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "smbd/service.h"
#include "lib/events/events.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"
/*
establish system creds
*/
static WERROR kccsrv_init_creds(struct kccsrv_service *service)
{
service->system_session_info = system_session(service->task->lp_ctx);
if (!service->system_session_info) {
return WERR_NOMEM;
}
return WERR_OK;
}
/*
connect to the local SAM
*/
static WERROR kccsrv_connect_samdb(struct kccsrv_service *service, struct loadparm_context *lp_ctx)
{
const struct GUID *ntds_guid;
service->samdb = samdb_connect(service, service->task->event_ctx, lp_ctx, service->system_session_info, 0);
if (!service->samdb) {
return WERR_DS_UNAVAILABLE;
}
ntds_guid = samdb_ntds_objectGUID(service->samdb);
if (!ntds_guid) {
return WERR_DS_UNAVAILABLE;
}
service->ntds_guid = *ntds_guid;
if (samdb_rodc(service->samdb, &service->am_rodc) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to determine RODC status\n"));
return WERR_DS_UNAVAILABLE;
}
return WERR_OK;
}
/*
load our local partition list
*/
static WERROR kccsrv_load_partitions(struct kccsrv_service *s)
{
struct ldb_dn *basedn;
struct ldb_result *r;
struct ldb_message_element *el;
static const char *attrs[] = { "namingContexts", "configurationNamingContext", NULL };
unsigned int i;
int ret;
basedn = ldb_dn_new(s, s->samdb, NULL);
W_ERROR_HAVE_NO_MEMORY(basedn);
ret = ldb_search(s->samdb, s, &r, basedn, LDB_SCOPE_BASE, attrs,
"(objectClass=*)");
talloc_free(basedn);
if (ret != LDB_SUCCESS) {
return WERR_FOOBAR;
} else if (r->count != 1) {
talloc_free(r);
return WERR_FOOBAR;
}
el = ldb_msg_find_element(r->msgs[0], "namingContexts");
if (!el) {
return WERR_FOOBAR;
}
for (i=0; i < el->num_values; i++) {
const char *v = (const char *)el->values[i].data;
struct ldb_dn *pdn;
struct kccsrv_partition *p;
pdn = ldb_dn_new(s, s->samdb, v);
if (!ldb_dn_validate(pdn)) {
return WERR_FOOBAR;
}
p = talloc_zero(s, struct kccsrv_partition);
W_ERROR_HAVE_NO_MEMORY(p);
p->dn = talloc_steal(p, pdn);
p->service = s;
DLIST_ADD(s->partitions, p);
DEBUG(2, ("kccsrv_partition[%s] loaded\n", v));
}
el = ldb_msg_find_element(r->msgs[0], "configurationNamingContext");
if (!el) {
return WERR_FOOBAR;
}
s->config_dn = ldb_dn_new(s, s->samdb, (const char *)el->values[0].data);
if (!ldb_dn_validate(s->config_dn)) {
return WERR_FOOBAR;
}
talloc_free(r);
return WERR_OK;
}
static NTSTATUS kccsrv_execute_kcc(struct irpc_message *msg, struct drsuapi_DsExecuteKCC *r)
{
TALLOC_CTX *mem_ctx;
NTSTATUS status;
struct kccsrv_service *service = talloc_get_type(msg->private_data, struct kccsrv_service);
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);
return status;
}
talloc_free(mem_ctx);
return NT_STATUS_OK;
}
static NTSTATUS kccsrv_replica_get_info(struct irpc_message *msg, struct drsuapi_DsReplicaGetInfo *r)
{
return kccdrs_replica_get_info(msg, r);
}
/*
startup the kcc service task
*/
static void kccsrv_task_init(struct task_server *task)
{
WERROR status;
struct kccsrv_service *service;
uint32_t periodic_startup_interval;
switch (lpcfg_server_role(task->lp_ctx)) {
case ROLE_STANDALONE:
task_server_terminate(task, "kccsrv: no KCC required in standalone configuration", false);
return;
case ROLE_DOMAIN_MEMBER:
task_server_terminate(task, "kccsrv: no KCC required in domain member configuration", false);
return;
case ROLE_DOMAIN_CONTROLLER:
/* Yes, we want a KCC */
break;
}
task_server_set_title(task, "task[kccsrv]");
service = talloc_zero(task, struct kccsrv_service);
if (!service) {
task_server_terminate(task, "kccsrv_task_init: out of memory", true);
return;
}
service->task = task;
service->startup_time = timeval_current();
task->private_data = service;
status = kccsrv_init_creds(service);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(task,
talloc_asprintf(task,
"kccsrv: Failed to obtain server credentials: %s\n",
win_errstr(status)), true);
return;
}
status = kccsrv_connect_samdb(service, task->lp_ctx);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(task, talloc_asprintf(task,
"kccsrv: Failed to connect to local samdb: %s\n",
win_errstr(status)), true);
return;
}
status = kccsrv_load_partitions(service);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(task, talloc_asprintf(task,
"kccsrv: Failed to load partitions: %s\n",
win_errstr(status)), true);
return;
}
periodic_startup_interval = lpcfg_parm_int(task->lp_ctx, NULL, "kccsrv",
"periodic_startup_interval", 15); /* in seconds */
service->periodic.interval = lpcfg_parm_int(task->lp_ctx, NULL, "kccsrv",
"periodic_interval", 300); /* in seconds */
status = kccsrv_periodic_schedule(service, periodic_startup_interval);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(task, talloc_asprintf(task,
"kccsrv: Failed to periodic schedule: %s\n",
win_errstr(status)), true);
return;
}
irpc_add_name(task->msg_ctx, "kccsrv");
IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSEXECUTEKCC, kccsrv_execute_kcc, service);
IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICAGETINFO, kccsrv_replica_get_info, service);
}
/*
register ourselves as a available server
*/
NTSTATUS server_service_kcc_init(void)
{
return register_server_service("kcc", kccsrv_task_init);
}
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