2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2002
7 Copyright (C) Volker Lendecke 2004,2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * We fork a child per domain to be able to act non-blocking in the main
25 * winbind daemon. A domain controller thousands of miles away being being
26 * slow replying with a 10.000 user list should not hold up netlogon calls
27 * that can be handled locally.
32 #include "rpc_client/rpc_client.h"
33 #include "nsswitch/wb_reqtrans.h"
35 #include "../lib/util/select.h"
36 #include "../libcli/security/security.h"
37 #include "system/select.h"
39 #include "../lib/util/tevent_unix.h"
40 #include "lib/param/loadparm.h"
41 #include "lib/util/sys_rw.h"
42 #include "lib/util/sys_rw_data.h"
45 #define DBGC_CLASS DBGC_WINBIND
47 extern bool override_logfile
;
49 static struct winbindd_child
*winbindd_children
= NULL
;
51 /* Read some data from a client connection */
53 static NTSTATUS
child_read_request(int sock
, struct winbindd_request
*wreq
)
57 status
= read_data_ntstatus(sock
, (char *)wreq
, sizeof(*wreq
));
58 if (!NT_STATUS_IS_OK(status
)) {
59 DEBUG(3, ("child_read_request: read_data failed: %s\n",
64 if (wreq
->extra_len
== 0) {
65 wreq
->extra_data
.data
= NULL
;
69 DEBUG(10, ("Need to read %d extra bytes\n", (int)wreq
->extra_len
));
71 wreq
->extra_data
.data
= SMB_MALLOC_ARRAY(char, wreq
->extra_len
+ 1);
72 if (wreq
->extra_data
.data
== NULL
) {
73 DEBUG(0, ("malloc failed\n"));
74 return NT_STATUS_NO_MEMORY
;
77 /* Ensure null termination */
78 wreq
->extra_data
.data
[wreq
->extra_len
] = '\0';
80 status
= read_data_ntstatus(sock
, wreq
->extra_data
.data
,
82 if (!NT_STATUS_IS_OK(status
)) {
83 DEBUG(0, ("Could not read extra data: %s\n",
89 static NTSTATUS
child_write_response(int sock
, struct winbindd_response
*wrsp
)
94 iov
[0].iov_base
= (void *)wrsp
;
95 iov
[0].iov_len
= sizeof(struct winbindd_response
);
98 if (wrsp
->length
> sizeof(struct winbindd_response
)) {
99 iov
[1].iov_base
= (void *)wrsp
->extra_data
.data
;
100 iov
[1].iov_len
= wrsp
->length
-iov
[0].iov_len
;
104 DEBUG(10, ("Writing %d bytes to parent\n", (int)wrsp
->length
));
106 if (write_data_iov(sock
, iov
, iov_count
) != wrsp
->length
) {
107 DEBUG(0, ("Could not write result\n"));
108 return NT_STATUS_INVALID_HANDLE
;
115 * Do winbind child async request. This is not simply wb_simple_trans. We have
116 * to do the queueing ourselves because while a request is queued, the child
117 * might have crashed, and we have to re-fork it in the _trigger function.
120 struct wb_child_request_state
{
121 struct tevent_context
*ev
;
122 struct tevent_req
*subreq
;
123 struct winbindd_child
*child
;
124 struct winbindd_request
*request
;
125 struct winbindd_response
*response
;
128 static bool fork_domain_child(struct winbindd_child
*child
);
130 static void wb_child_request_trigger(struct tevent_req
*req
,
132 static void wb_child_request_done(struct tevent_req
*subreq
);
134 static void wb_child_request_cleanup(struct tevent_req
*req
,
135 enum tevent_req_state req_state
);
137 struct tevent_req
*wb_child_request_send(TALLOC_CTX
*mem_ctx
,
138 struct tevent_context
*ev
,
139 struct winbindd_child
*child
,
140 struct winbindd_request
*request
)
142 struct tevent_req
*req
;
143 struct wb_child_request_state
*state
;
145 req
= tevent_req_create(mem_ctx
, &state
,
146 struct wb_child_request_state
);
152 state
->child
= child
;
153 state
->request
= request
;
155 if (!tevent_queue_add(child
->queue
, ev
, req
,
156 wb_child_request_trigger
, NULL
)) {
158 return tevent_req_post(req
, ev
);
161 tevent_req_set_cleanup_fn(req
, wb_child_request_cleanup
);
166 static void wb_child_request_trigger(struct tevent_req
*req
,
169 struct wb_child_request_state
*state
= tevent_req_data(
170 req
, struct wb_child_request_state
);
171 struct tevent_req
*subreq
;
173 if ((state
->child
->sock
== -1) && (!fork_domain_child(state
->child
))) {
174 tevent_req_error(req
, errno
);
178 subreq
= wb_simple_trans_send(state
, winbind_event_context(), NULL
,
179 state
->child
->sock
, state
->request
);
180 if (tevent_req_nomem(subreq
, req
)) {
184 state
->subreq
= subreq
;
185 tevent_req_set_callback(subreq
, wb_child_request_done
, req
);
186 tevent_req_set_endtime(req
, state
->ev
, timeval_current_ofs(300, 0));
189 static void wb_child_request_done(struct tevent_req
*subreq
)
191 struct tevent_req
*req
= tevent_req_callback_data(
192 subreq
, struct tevent_req
);
193 struct wb_child_request_state
*state
= tevent_req_data(
194 req
, struct wb_child_request_state
);
197 ret
= wb_simple_trans_recv(subreq
, state
, &state
->response
, &err
);
198 /* Freeing the subrequest is deferred until the cleanup function,
199 * which has to know whether a subrequest exists, and consequently
200 * decide whether to shut down the pipe to the child process.
203 tevent_req_error(req
, err
);
206 tevent_req_done(req
);
209 int wb_child_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
210 struct winbindd_response
**presponse
, int *err
)
212 struct wb_child_request_state
*state
= tevent_req_data(
213 req
, struct wb_child_request_state
);
215 if (tevent_req_is_unix_error(req
, err
)) {
218 *presponse
= talloc_move(mem_ctx
, &state
->response
);
222 static void wb_child_request_cleanup(struct tevent_req
*req
,
223 enum tevent_req_state req_state
)
225 struct wb_child_request_state
*state
=
226 tevent_req_data(req
, struct wb_child_request_state
);
228 if (state
->subreq
== NULL
) {
229 /* nothing to cleanup */
233 TALLOC_FREE(state
->subreq
);
235 if (req_state
== TEVENT_REQ_DONE
) {
236 /* transmitted request and got response */
241 * Failed to transmit and receive response, or request
242 * cancelled while being serviced.
243 * The basic parent/child communication broke, close
246 close(state
->child
->sock
);
247 state
->child
->sock
= -1;
248 DLIST_REMOVE(winbindd_children
, state
->child
);
251 static bool winbindd_child_busy(struct winbindd_child
*child
)
253 return tevent_queue_length(child
->queue
) > 0;
256 static struct winbindd_child
*find_idle_child(struct winbindd_domain
*domain
)
260 for (i
=0; i
<lp_winbind_max_domain_connections(); i
++) {
261 if (!winbindd_child_busy(&domain
->children
[i
])) {
262 return &domain
->children
[i
];
269 struct winbindd_child
*choose_domain_child(struct winbindd_domain
*domain
)
271 struct winbindd_child
*result
;
273 result
= find_idle_child(domain
);
274 if (result
!= NULL
) {
277 return &domain
->children
[rand() % lp_winbind_max_domain_connections()];
280 struct dcerpc_binding_handle
*dom_child_handle(struct winbindd_domain
*domain
)
282 struct winbindd_child
*child
;
284 child
= choose_domain_child(domain
);
285 return child
->binding_handle
;
288 struct wb_domain_request_state
{
289 struct tevent_context
*ev
;
290 struct winbindd_domain
*domain
;
291 struct winbindd_child
*child
;
292 struct winbindd_request
*request
;
293 struct winbindd_request
*init_req
;
294 struct winbindd_response
*response
;
297 static void wb_domain_request_gotdc(struct tevent_req
*subreq
);
298 static void wb_domain_request_initialized(struct tevent_req
*subreq
);
299 static void wb_domain_request_done(struct tevent_req
*subreq
);
301 struct tevent_req
*wb_domain_request_send(TALLOC_CTX
*mem_ctx
,
302 struct tevent_context
*ev
,
303 struct winbindd_domain
*domain
,
304 struct winbindd_request
*request
)
306 struct tevent_req
*req
, *subreq
;
307 struct wb_domain_request_state
*state
;
309 req
= tevent_req_create(mem_ctx
, &state
,
310 struct wb_domain_request_state
);
315 state
->child
= choose_domain_child(domain
);
317 if (domain
->initialized
) {
318 subreq
= wb_child_request_send(state
, ev
, state
->child
,
320 if (tevent_req_nomem(subreq
, req
)) {
321 return tevent_req_post(req
, ev
);
323 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
327 state
->domain
= domain
;
329 state
->request
= request
;
331 state
->init_req
= talloc_zero(state
, struct winbindd_request
);
332 if (tevent_req_nomem(state
->init_req
, req
)) {
333 return tevent_req_post(req
, ev
);
336 if (IS_DC
|| domain
->primary
|| domain
->internal
) {
337 /* The primary domain has to find the DC name itself */
338 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
339 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
340 state
->init_req
->data
.init_conn
.is_primary
= domain
->primary
;
341 fstrcpy(state
->init_req
->data
.init_conn
.dcname
, "");
343 subreq
= wb_child_request_send(state
, ev
, state
->child
,
345 if (tevent_req_nomem(subreq
, req
)) {
346 return tevent_req_post(req
, ev
);
348 tevent_req_set_callback(subreq
, wb_domain_request_initialized
,
354 * Ask our DC for a DC name
356 domain
= find_our_domain();
358 /* This is *not* the primary domain, let's ask our DC about a DC
361 state
->init_req
->cmd
= WINBINDD_GETDCNAME
;
362 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
364 subreq
= wb_child_request_send(state
, ev
, state
->child
, request
);
365 if (tevent_req_nomem(subreq
, req
)) {
366 return tevent_req_post(req
, ev
);
368 tevent_req_set_callback(subreq
, wb_domain_request_gotdc
, req
);
372 static void wb_domain_request_gotdc(struct tevent_req
*subreq
)
374 struct tevent_req
*req
= tevent_req_callback_data(
375 subreq
, struct tevent_req
);
376 struct wb_domain_request_state
*state
= tevent_req_data(
377 req
, struct wb_domain_request_state
);
378 struct winbindd_response
*response
;
381 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
384 tevent_req_error(req
, err
);
387 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
388 fstrcpy(state
->init_req
->domain_name
, state
->domain
->name
);
389 state
->init_req
->data
.init_conn
.is_primary
= False
;
390 fstrcpy(state
->init_req
->data
.init_conn
.dcname
,
391 response
->data
.dc_name
);
393 TALLOC_FREE(response
);
395 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
397 if (tevent_req_nomem(subreq
, req
)) {
400 tevent_req_set_callback(subreq
, wb_domain_request_initialized
, req
);
403 static void wb_domain_request_initialized(struct tevent_req
*subreq
)
405 struct tevent_req
*req
= tevent_req_callback_data(
406 subreq
, struct tevent_req
);
407 struct wb_domain_request_state
*state
= tevent_req_data(
408 req
, struct wb_domain_request_state
);
409 struct winbindd_response
*response
;
412 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
415 tevent_req_error(req
, err
);
419 if (!string_to_sid(&state
->domain
->sid
,
420 response
->data
.domain_info
.sid
)) {
421 DEBUG(1,("init_child_recv: Could not convert sid %s "
422 "from string\n", response
->data
.domain_info
.sid
));
423 tevent_req_error(req
, EINVAL
);
427 talloc_free(state
->domain
->name
);
428 state
->domain
->name
= talloc_strdup(state
->domain
,
429 response
->data
.domain_info
.name
);
430 if (state
->domain
->name
== NULL
) {
431 tevent_req_error(req
, ENOMEM
);
435 if (response
->data
.domain_info
.alt_name
[0] != '\0') {
436 talloc_free(state
->domain
->alt_name
);
438 state
->domain
->alt_name
= talloc_strdup(state
->domain
,
439 response
->data
.domain_info
.alt_name
);
440 if (state
->domain
->alt_name
== NULL
) {
441 tevent_req_error(req
, ENOMEM
);
446 state
->domain
->native_mode
= response
->data
.domain_info
.native_mode
;
447 state
->domain
->active_directory
=
448 response
->data
.domain_info
.active_directory
;
449 state
->domain
->initialized
= true;
451 TALLOC_FREE(response
);
453 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
455 if (tevent_req_nomem(subreq
, req
)) {
458 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
461 static void wb_domain_request_done(struct tevent_req
*subreq
)
463 struct tevent_req
*req
= tevent_req_callback_data(
464 subreq
, struct tevent_req
);
465 struct wb_domain_request_state
*state
= tevent_req_data(
466 req
, struct wb_domain_request_state
);
469 ret
= wb_child_request_recv(subreq
, talloc_tos(), &state
->response
,
473 tevent_req_error(req
, err
);
476 tevent_req_done(req
);
479 int wb_domain_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
480 struct winbindd_response
**presponse
, int *err
)
482 struct wb_domain_request_state
*state
= tevent_req_data(
483 req
, struct wb_domain_request_state
);
485 if (tevent_req_is_unix_error(req
, err
)) {
488 *presponse
= talloc_move(mem_ctx
, &state
->response
);
492 static void child_process_request(struct winbindd_child
*child
,
493 struct winbindd_cli_state
*state
)
495 struct winbindd_domain
*domain
= child
->domain
;
496 const struct winbindd_child_dispatch_table
*table
= child
->table
;
498 /* Free response data - we may be interrupted and receive another
499 command before being able to send this data off. */
501 state
->response
->result
= WINBINDD_ERROR
;
502 state
->response
->length
= sizeof(struct winbindd_response
);
504 /* as all requests in the child are sync, we can use talloc_tos() */
505 state
->mem_ctx
= talloc_tos();
507 /* Process command */
509 for (; table
->name
; table
++) {
510 if (state
->request
->cmd
== table
->struct_cmd
) {
511 DEBUG(10,("child_process_request: request fn %s\n",
513 state
->response
->result
= table
->struct_fn(domain
, state
);
518 DEBUG(1, ("child_process_request: unknown request fn number %d\n",
519 (int)state
->request
->cmd
));
520 state
->response
->result
= WINBINDD_ERROR
;
523 void setup_child(struct winbindd_domain
*domain
, struct winbindd_child
*child
,
524 const struct winbindd_child_dispatch_table
*table
,
525 const char *logprefix
,
528 if (logprefix
&& logname
) {
529 char *logbase
= NULL
;
531 if (*lp_logfile(talloc_tos())) {
534 if (asprintf(&logbase
, "%s", lp_logfile(talloc_tos())) < 0) {
535 smb_panic("Internal error: asprintf failed");
538 if ((end
= strrchr_m(logbase
, '/'))) {
542 if (asprintf(&logbase
, "%s", get_dyn_LOGFILEBASE()) < 0) {
543 smb_panic("Internal error: asprintf failed");
547 if (asprintf(&child
->logfilename
, "%s/%s-%s",
548 logbase
, logprefix
, logname
) < 0) {
550 smb_panic("Internal error: asprintf failed");
555 smb_panic("Internal error: logprefix == NULL && "
560 child
->domain
= domain
;
561 child
->table
= table
;
562 child
->queue
= tevent_queue_create(NULL
, "winbind_child");
563 SMB_ASSERT(child
->queue
!= NULL
);
564 child
->binding_handle
= wbint_binding_handle(NULL
, domain
, child
);
565 SMB_ASSERT(child
->binding_handle
!= NULL
);
568 void winbind_child_died(pid_t pid
)
570 struct winbindd_child
*child
;
572 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
573 if (child
->pid
== pid
) {
579 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid
));
583 /* This will be re-added in fork_domain_child() */
585 DLIST_REMOVE(winbindd_children
, child
);
588 if (child
->sock
!= -1) {
594 /* Ensure any negative cache entries with the netbios or realm names are removed. */
596 void winbindd_flush_negative_conn_cache(struct winbindd_domain
*domain
)
598 flush_negative_conn_cache_for_domain(domain
->name
);
599 if (domain
->alt_name
!= NULL
) {
600 flush_negative_conn_cache_for_domain(domain
->alt_name
);
605 * Parent winbindd process sets its own debug level first and then
606 * sends a message to all the winbindd children to adjust their debug
607 * level to that of parents.
610 void winbind_msg_debug(struct messaging_context
*msg_ctx
,
613 struct server_id server_id
,
616 struct winbindd_child
*child
;
618 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
620 debug_message(msg_ctx
, private_data
, MSG_DEBUG
, server_id
, data
);
622 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
624 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
625 (unsigned int)child
->pid
));
627 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
630 strlen((char *) data
->data
) + 1);
634 /* Set our domains as offline and forward the offline message to our children. */
636 void winbind_msg_offline(struct messaging_context
*msg_ctx
,
639 struct server_id server_id
,
642 struct winbindd_child
*child
;
643 struct winbindd_domain
*domain
;
645 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
647 if (!lp_winbind_offline_logon()) {
648 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
652 /* Set our global state as offline. */
653 if (!set_global_winbindd_state_offline()) {
654 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
658 /* Set all our domains as offline. */
659 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
660 if (domain
->internal
) {
663 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain
->name
));
664 set_domain_offline(domain
);
667 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
668 /* Don't send message to internal children. We've already
670 if (!child
->domain
|| winbindd_internal_child(child
)) {
674 /* Or internal domains (this should not be possible....) */
675 if (child
->domain
->internal
) {
679 /* Each winbindd child should only process requests for one domain - make sure
680 we only set it online / offline for that domain. */
682 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
683 (unsigned int)child
->pid
, child
->domain
->name
));
685 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
687 (const uint8_t *)child
->domain
->name
,
688 strlen(child
->domain
->name
)+1);
692 /* Set our domains as online and forward the online message to our children. */
694 void winbind_msg_online(struct messaging_context
*msg_ctx
,
697 struct server_id server_id
,
700 struct winbindd_child
*child
;
701 struct winbindd_domain
*domain
;
703 DEBUG(10,("winbind_msg_online: got online message.\n"));
705 if (!lp_winbind_offline_logon()) {
706 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
710 /* Set our global state as online. */
711 set_global_winbindd_state_online();
713 smb_nscd_flush_user_cache();
714 smb_nscd_flush_group_cache();
716 /* Set all our domains as online. */
717 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
718 if (domain
->internal
) {
721 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain
->name
));
723 winbindd_flush_negative_conn_cache(domain
);
724 set_domain_online_request(domain
);
726 /* Send an online message to the idmap child when our
727 primary domain comes back online */
729 if ( domain
->primary
) {
730 struct winbindd_child
*idmap
= idmap_child();
732 if ( idmap
->pid
!= 0 ) {
733 messaging_send_buf(msg_ctx
,
734 pid_to_procid(idmap
->pid
),
736 (const uint8_t *)domain
->name
,
737 strlen(domain
->name
)+1);
742 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
743 /* Don't send message to internal childs. */
744 if (!child
->domain
|| winbindd_internal_child(child
)) {
748 /* Or internal domains (this should not be possible....) */
749 if (child
->domain
->internal
) {
753 /* Each winbindd child should only process requests for one domain - make sure
754 we only set it online / offline for that domain. */
756 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
757 (unsigned int)child
->pid
, child
->domain
->name
));
759 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
761 (const uint8_t *)child
->domain
->name
,
762 strlen(child
->domain
->name
)+1);
766 static const char *collect_onlinestatus(TALLOC_CTX
*mem_ctx
)
768 struct winbindd_domain
*domain
;
771 if ((buf
= talloc_asprintf(mem_ctx
, "global:%s ",
772 get_global_winbindd_state_offline() ?
773 "Offline":"Online")) == NULL
) {
777 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
778 if ((buf
= talloc_asprintf_append_buffer(buf
, "%s:%s ",
781 "Online":"Offline")) == NULL
) {
786 buf
= talloc_asprintf_append_buffer(buf
, "\n");
788 DEBUG(5,("collect_onlinestatus: %s", buf
));
793 void winbind_msg_onlinestatus(struct messaging_context
*msg_ctx
,
796 struct server_id server_id
,
801 struct server_id
*sender
;
803 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
809 sender
= (struct server_id
*)data
->data
;
811 mem_ctx
= talloc_init("winbind_msg_onlinestatus");
812 if (mem_ctx
== NULL
) {
816 message
= collect_onlinestatus(mem_ctx
);
817 if (message
== NULL
) {
818 talloc_destroy(mem_ctx
);
822 messaging_send_buf(msg_ctx
, *sender
, MSG_WINBIND_ONLINESTATUS
,
823 (const uint8_t *)message
, strlen(message
) + 1);
825 talloc_destroy(mem_ctx
);
828 void winbind_msg_dump_event_list(struct messaging_context
*msg_ctx
,
831 struct server_id server_id
,
834 struct winbindd_child
*child
;
836 DEBUG(10,("winbind_msg_dump_event_list received\n"));
838 dump_event_list(winbind_event_context());
840 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
842 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
843 (unsigned int)child
->pid
));
845 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
852 void winbind_msg_dump_domain_list(struct messaging_context
*msg_ctx
,
855 struct server_id server_id
,
859 const char *message
= NULL
;
860 struct server_id
*sender
= NULL
;
861 const char *domain
= NULL
;
864 struct winbindd_domain
*dom
= NULL
;
866 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
868 if (!data
|| !data
->data
) {
872 if (data
->length
< sizeof(struct server_id
)) {
876 mem_ctx
= talloc_init("winbind_msg_dump_domain_list");
881 sender
= (struct server_id
*)data
->data
;
882 if (data
->length
> sizeof(struct server_id
)) {
883 domain
= (const char *)data
->data
+sizeof(struct server_id
);
888 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
891 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
,
892 find_domain_from_name_noinit(domain
));
894 talloc_destroy(mem_ctx
);
898 messaging_send_buf(msg_ctx
, *sender
,
899 MSG_WINBIND_DUMP_DOMAIN_LIST
,
900 (const uint8_t *)message
, strlen(message
) + 1);
902 talloc_destroy(mem_ctx
);
907 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
909 for (dom
= domain_list(); dom
; dom
=dom
->next
) {
910 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
, dom
);
912 talloc_destroy(mem_ctx
);
916 s
= talloc_asprintf_append(s
, "%s\n", message
);
918 talloc_destroy(mem_ctx
);
923 status
= messaging_send_buf(msg_ctx
, *sender
,
924 MSG_WINBIND_DUMP_DOMAIN_LIST
,
925 (uint8_t *)s
, strlen(s
) + 1);
926 if (!NT_STATUS_IS_OK(status
)) {
927 DEBUG(0,("failed to send message: %s\n",
931 talloc_destroy(mem_ctx
);
934 static void account_lockout_policy_handler(struct tevent_context
*ctx
,
935 struct tevent_timer
*te
,
939 struct winbindd_child
*child
=
940 (struct winbindd_child
*)private_data
;
941 TALLOC_CTX
*mem_ctx
= NULL
;
942 struct winbindd_methods
*methods
;
943 struct samr_DomInfo12 lockout_policy
;
946 DEBUG(10,("account_lockout_policy_handler called\n"));
948 TALLOC_FREE(child
->lockout_policy_event
);
950 if ( !winbindd_can_contact_domain( child
->domain
) ) {
951 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
952 "do not have an incoming trust to domain %s\n",
953 child
->domain
->name
));
958 methods
= child
->domain
->methods
;
960 mem_ctx
= talloc_init("account_lockout_policy_handler ctx");
962 result
= NT_STATUS_NO_MEMORY
;
964 result
= methods
->lockout_policy(child
->domain
, mem_ctx
, &lockout_policy
);
966 TALLOC_FREE(mem_ctx
);
968 if (!NT_STATUS_IS_OK(result
)) {
969 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
973 child
->lockout_policy_event
= tevent_add_timer(winbind_event_context(), NULL
,
974 timeval_current_ofs(3600, 0),
975 account_lockout_policy_handler
,
979 static time_t get_machine_password_timeout(void)
981 /* until we have gpo support use lp setting */
982 return lp_machine_password_timeout();
985 static bool calculate_next_machine_pwd_change(const char *domain
,
988 time_t pass_last_set_time
;
994 pw
= secrets_fetch_machine_password(domain
,
999 DEBUG(0,("cannot fetch own machine password ????"));
1005 timeout
= get_machine_password_timeout();
1007 DEBUG(10,("machine password never expires\n"));
1011 tv
.tv_sec
= pass_last_set_time
;
1012 DEBUG(10, ("password last changed %s\n",
1013 timeval_string(talloc_tos(), &tv
, false)));
1014 tv
.tv_sec
+= timeout
;
1015 DEBUGADD(10, ("password valid until %s\n",
1016 timeval_string(talloc_tos(), &tv
, false)));
1018 if (time(NULL
) < (pass_last_set_time
+ timeout
)) {
1019 next_change
= pass_last_set_time
+ timeout
;
1020 DEBUG(10,("machine password still valid until: %s\n",
1021 http_timestring(talloc_tos(), next_change
)));
1022 *t
= timeval_set(next_change
, 0);
1024 if (lp_clustering()) {
1027 * When having a cluster, we have several
1028 * winbinds racing for the password change. In
1029 * the machine_password_change_handler()
1030 * function we check if someone else was
1031 * faster when the event triggers. We add a
1032 * 255-second random delay here, so that we
1033 * don't run to change the password at the
1034 * exact same moment.
1036 generate_random_buffer(&randbuf
, sizeof(randbuf
));
1037 DEBUG(10, ("adding %d seconds randomness\n",
1039 t
->tv_sec
+= randbuf
;
1044 DEBUG(10,("machine password expired, needs immediate change\n"));
1046 *t
= timeval_zero();
1051 static void machine_password_change_handler(struct tevent_context
*ctx
,
1052 struct tevent_timer
*te
,
1056 struct messaging_context
*msg_ctx
= winbind_messaging_context();
1057 struct winbindd_child
*child
=
1058 (struct winbindd_child
*)private_data
;
1059 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
1061 struct timeval next_change
;
1063 DEBUG(10,("machine_password_change_handler called\n"));
1065 TALLOC_FREE(child
->machine_password_change_event
);
1067 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
1069 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1073 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1074 timeval_string(talloc_tos(), &next_change
, false)));
1076 if (!timeval_expired(&next_change
)) {
1077 DEBUG(10, ("Someone else has already changed the pw\n"));
1081 if (!winbindd_can_contact_domain(child
->domain
)) {
1082 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1083 "do not have an incoming trust to domain %s\n",
1084 child
->domain
->name
));
1088 result
= cm_connect_netlogon(child
->domain
, &netlogon_pipe
);
1089 if (!NT_STATUS_IS_OK(result
)) {
1090 DEBUG(10,("machine_password_change_handler: "
1091 "failed to connect netlogon pipe: %s\n",
1092 nt_errstr(result
)));
1096 result
= trust_pw_change(child
->domain
->conn
.netlogon_creds
,
1098 netlogon_pipe
->binding_handle
,
1099 child
->domain
->name
,
1102 DEBUG(10, ("machine_password_change_handler: "
1103 "trust_pw_change returned %s\n",
1104 nt_errstr(result
)));
1106 if (NT_STATUS_EQUAL(result
, NT_STATUS_ACCESS_DENIED
) ) {
1107 DEBUG(3,("machine_password_change_handler: password set returned "
1108 "ACCESS_DENIED. Maybe the trust account "
1109 "password was changed and we didn't know it. "
1110 "Killing connections to domain %s\n",
1111 child
->domain
->name
));
1112 invalidate_cm_connection(child
->domain
);
1115 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
1117 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1121 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1122 timeval_string(talloc_tos(), &next_change
, false)));
1124 if (!NT_STATUS_IS_OK(result
)) {
1127 * In case of failure, give the DC a minute to recover
1129 tmp
= timeval_current_ofs(60, 0);
1130 next_change
= timeval_max(&next_change
, &tmp
);
1134 child
->machine_password_change_event
= tevent_add_timer(winbind_event_context(), NULL
,
1136 machine_password_change_handler
,
1140 /* Deal with a request to go offline. */
1142 static void child_msg_offline(struct messaging_context
*msg
,
1145 struct server_id server_id
,
1148 struct winbindd_domain
*domain
;
1149 struct winbindd_domain
*primary_domain
= NULL
;
1150 const char *domainname
= (const char *)data
->data
;
1152 if (data
->data
== NULL
|| data
->length
== 0) {
1156 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname
));
1158 if (!lp_winbind_offline_logon()) {
1159 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1163 primary_domain
= find_our_domain();
1165 /* Mark the requested domain offline. */
1167 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1168 if (domain
->internal
) {
1171 if (strequal(domain
->name
, domainname
)) {
1172 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain
->name
));
1173 set_domain_offline(domain
);
1174 /* we are in the trusted domain, set the primary domain
1176 if (domain
!= primary_domain
) {
1177 set_domain_offline(primary_domain
);
1183 /* Deal with a request to go online. */
1185 static void child_msg_online(struct messaging_context
*msg
,
1188 struct server_id server_id
,
1191 struct winbindd_domain
*domain
;
1192 struct winbindd_domain
*primary_domain
= NULL
;
1193 const char *domainname
= (const char *)data
->data
;
1195 if (data
->data
== NULL
|| data
->length
== 0) {
1199 DEBUG(5,("child_msg_online received for domain %s.\n", domainname
));
1201 if (!lp_winbind_offline_logon()) {
1202 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1206 primary_domain
= find_our_domain();
1208 /* Set our global state as online. */
1209 set_global_winbindd_state_online();
1211 /* Try and mark everything online - delete any negative cache entries
1212 to force a reconnect now. */
1214 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1215 if (domain
->internal
) {
1218 if (strequal(domain
->name
, domainname
)) {
1219 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain
->name
));
1220 winbindd_flush_negative_conn_cache(domain
);
1221 set_domain_online_request(domain
);
1223 /* we can be in trusted domain, which will contact primary domain
1224 * we have to bring primary domain online in trusted domain process
1225 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1226 * --> contact_domain = find_our_domain()
1228 if (domain
!= primary_domain
) {
1229 winbindd_flush_negative_conn_cache(primary_domain
);
1230 set_domain_online_request(primary_domain
);
1236 static void child_msg_dump_event_list(struct messaging_context
*msg
,
1239 struct server_id server_id
,
1242 DEBUG(5,("child_msg_dump_event_list received\n"));
1244 dump_event_list(winbind_event_context());
1247 NTSTATUS
winbindd_reinit_after_fork(const struct winbindd_child
*myself
,
1248 const char *logfilename
)
1250 struct winbindd_domain
*domain
;
1251 struct winbindd_child
*cl
;
1254 status
= reinit_after_fork(
1255 winbind_messaging_context(),
1256 winbind_event_context(),
1258 if (!NT_STATUS_IS_OK(status
)) {
1259 DEBUG(0,("reinit_after_fork() failed\n"));
1263 close_conns_after_fork();
1265 if (!override_logfile
&& logfilename
) {
1266 lp_set_logfile(logfilename
);
1270 if (!winbindd_setup_sig_term_handler(false))
1271 return NT_STATUS_NO_MEMORY
;
1272 if (!winbindd_setup_sig_hup_handler(override_logfile
? NULL
:
1274 return NT_STATUS_NO_MEMORY
;
1276 /* Stop zombies in children */
1279 /* Don't handle the same messages as our parent. */
1280 messaging_deregister(winbind_messaging_context(),
1281 MSG_SMB_CONF_UPDATED
, NULL
);
1282 messaging_deregister(winbind_messaging_context(),
1283 MSG_SHUTDOWN
, NULL
);
1284 messaging_deregister(winbind_messaging_context(),
1285 MSG_WINBIND_OFFLINE
, NULL
);
1286 messaging_deregister(winbind_messaging_context(),
1287 MSG_WINBIND_ONLINE
, NULL
);
1288 messaging_deregister(winbind_messaging_context(),
1289 MSG_WINBIND_ONLINESTATUS
, NULL
);
1290 messaging_deregister(winbind_messaging_context(),
1291 MSG_DUMP_EVENT_LIST
, NULL
);
1292 messaging_deregister(winbind_messaging_context(),
1293 MSG_WINBIND_DUMP_DOMAIN_LIST
, NULL
);
1294 messaging_deregister(winbind_messaging_context(),
1297 messaging_deregister(winbind_messaging_context(),
1298 MSG_WINBIND_DOMAIN_OFFLINE
, NULL
);
1299 messaging_deregister(winbind_messaging_context(),
1300 MSG_WINBIND_DOMAIN_ONLINE
, NULL
);
1302 /* We have destroyed all events in the winbindd_event_context
1303 * in reinit_after_fork(), so clean out all possible pending
1304 * event pointers. */
1306 /* Deal with check_online_events. */
1308 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1309 TALLOC_FREE(domain
->check_online_event
);
1312 /* Ensure we're not handling a credential cache event inherited
1313 * from our parent. */
1315 ccache_remove_all_after_fork();
1317 /* Destroy all possible events in child list. */
1318 for (cl
= winbindd_children
; cl
!= NULL
; cl
= cl
->next
) {
1319 TALLOC_FREE(cl
->lockout_policy_event
);
1320 TALLOC_FREE(cl
->machine_password_change_event
);
1322 /* Children should never be able to send
1323 * each other messages, all messages must
1324 * go through the parent.
1329 * Close service sockets to all other children
1331 if ((cl
!= myself
) && (cl
->sock
!= -1)) {
1337 * This is a little tricky, children must not
1338 * send an MSG_WINBIND_ONLINE message to idmap_child().
1339 * If we are in a child of our primary domain or
1340 * in the process created by fork_child_dc_connect(),
1341 * and the primary domain cannot go online,
1342 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1343 * periodically to idmap_child().
1345 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1346 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1347 * ---> init_dc_connection() ---> cm_open_connection --->
1348 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1349 * idmap_child(). Disallow children sending messages
1350 * to each other, all messages must go through the parent.
1355 return NT_STATUS_OK
;
1359 * In a child there will be only one domain, reference that here.
1361 static struct winbindd_domain
*child_domain
;
1363 struct winbindd_domain
*wb_child_domain(void)
1365 return child_domain
;
1368 struct child_handler_state
{
1369 struct winbindd_child
*child
;
1370 struct winbindd_cli_state cli
;
1373 static void child_handler(struct tevent_context
*ev
, struct tevent_fd
*fde
,
1374 uint16_t flags
, void *private_data
)
1376 struct child_handler_state
*state
=
1377 (struct child_handler_state
*)private_data
;
1380 /* fetch a request from the main daemon */
1381 status
= child_read_request(state
->cli
.sock
, state
->cli
.request
);
1383 if (!NT_STATUS_IS_OK(status
)) {
1384 /* we lost contact with our parent */
1388 DEBUG(4,("child daemon request %d\n",
1389 (int)state
->cli
.request
->cmd
));
1391 ZERO_STRUCTP(state
->cli
.response
);
1392 state
->cli
.request
->null_term
= '\0';
1393 state
->cli
.mem_ctx
= talloc_tos();
1394 child_process_request(state
->child
, &state
->cli
);
1396 DEBUG(4, ("Finished processing child request %d\n",
1397 (int)state
->cli
.request
->cmd
));
1399 SAFE_FREE(state
->cli
.request
->extra_data
.data
);
1401 status
= child_write_response(state
->cli
.sock
, state
->cli
.response
);
1402 if (!NT_STATUS_IS_OK(status
)) {
1407 static bool fork_domain_child(struct winbindd_child
*child
)
1410 struct child_handler_state state
;
1411 struct winbindd_request request
;
1412 struct winbindd_response response
;
1413 struct winbindd_domain
*primary_domain
= NULL
;
1416 struct tevent_fd
*fde
;
1418 if (child
->domain
) {
1419 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1420 child
->domain
->name
));
1422 DEBUG(10, ("fork_domain_child called without domain.\n"));
1425 if (socketpair(AF_UNIX
, SOCK_STREAM
, 0, fdpair
) != 0) {
1426 DEBUG(0, ("Could not open child pipe: %s\n",
1432 state
.child
= child
;
1433 state
.cli
.pid
= getpid();
1434 state
.cli
.request
= &request
;
1435 state
.cli
.response
= &response
;
1437 child
->pid
= fork();
1439 if (child
->pid
== -1) {
1440 DEBUG(0, ("Could not fork: %s\n", strerror(errno
)));
1446 if (child
->pid
!= 0) {
1452 nread
= sys_read(fdpair
[1], &status
, sizeof(status
));
1453 if (nread
!= sizeof(status
)) {
1454 DEBUG(1, ("fork_domain_child: Could not read child status: "
1455 "nread=%d, error=%s\n", (int)nread
,
1460 if (!NT_STATUS_IS_OK(status
)) {
1461 DEBUG(1, ("fork_domain_child: Child status is %s\n",
1462 nt_errstr(status
)));
1467 child
->next
= child
->prev
= NULL
;
1468 DLIST_ADD(winbindd_children
, child
);
1469 child
->sock
= fdpair
[1];
1474 child_domain
= child
->domain
;
1476 DEBUG(10, ("Child process %d\n", (int)getpid()));
1478 state
.cli
.sock
= fdpair
[0];
1481 status
= winbindd_reinit_after_fork(child
, child
->logfilename
);
1483 nwritten
= sys_write(state
.cli
.sock
, &status
, sizeof(status
));
1484 if (nwritten
!= sizeof(status
)) {
1485 DEBUG(1, ("fork_domain_child: Could not write status: "
1486 "nwritten=%d, error=%s\n", (int)nwritten
,
1490 if (!NT_STATUS_IS_OK(status
)) {
1491 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
1492 nt_errstr(status
)));
1496 /* Handle online/offline messages. */
1497 messaging_register(winbind_messaging_context(), NULL
,
1498 MSG_WINBIND_OFFLINE
, child_msg_offline
);
1499 messaging_register(winbind_messaging_context(), NULL
,
1500 MSG_WINBIND_ONLINE
, child_msg_online
);
1501 messaging_register(winbind_messaging_context(), NULL
,
1502 MSG_DUMP_EVENT_LIST
, child_msg_dump_event_list
);
1503 messaging_register(winbind_messaging_context(), NULL
,
1504 MSG_DEBUG
, debug_message
);
1505 messaging_register(winbind_messaging_context(), NULL
,
1506 MSG_WINBIND_IP_DROPPED
,
1507 winbind_msg_ip_dropped
);
1510 primary_domain
= find_our_domain();
1512 if (primary_domain
== NULL
) {
1513 smb_panic("no primary domain found");
1516 /* It doesn't matter if we allow cache login,
1517 * try to bring domain online after fork. */
1518 if ( child
->domain
) {
1519 child
->domain
->startup
= True
;
1520 child
->domain
->startup_time
= time_mono(NULL
);
1521 /* we can be in primary domain or in trusted domain
1522 * If we are in trusted domain, set the primary domain
1523 * in start-up mode */
1524 if (!(child
->domain
->internal
)) {
1525 set_domain_online_request(child
->domain
);
1526 if (!(child
->domain
->primary
)) {
1527 primary_domain
->startup
= True
;
1528 primary_domain
->startup_time
= time_mono(NULL
);
1529 set_domain_online_request(primary_domain
);
1535 * We are in idmap child, make sure that we set the
1536 * check_online_event to bring primary domain online.
1538 if (child
== idmap_child()) {
1539 set_domain_online_request(primary_domain
);
1542 /* We might be in the idmap child...*/
1543 if (child
->domain
&& !(child
->domain
->internal
) &&
1544 lp_winbind_offline_logon()) {
1546 set_domain_online_request(child
->domain
);
1548 if (primary_domain
&& (primary_domain
!= child
->domain
)) {
1549 /* We need to talk to the primary
1550 * domain as well as the trusted
1551 * domain inside a trusted domain
1554 * set_dc_type_and_flags_trustinfo()
1557 set_domain_online_request(primary_domain
);
1560 child
->lockout_policy_event
= tevent_add_timer(
1561 winbind_event_context(), NULL
, timeval_zero(),
1562 account_lockout_policy_handler
,
1566 if (child
->domain
&& child
->domain
->primary
&&
1567 !USE_KERBEROS_KEYTAB
&&
1568 lp_server_role() == ROLE_DOMAIN_MEMBER
) {
1570 struct timeval next_change
;
1572 if (calculate_next_machine_pwd_change(child
->domain
->name
,
1574 child
->machine_password_change_event
= tevent_add_timer(
1575 winbind_event_context(), NULL
, next_change
,
1576 machine_password_change_handler
,
1581 fde
= tevent_add_fd(winbind_event_context(), NULL
, state
.cli
.sock
,
1582 TEVENT_FD_READ
, child_handler
, &state
);
1584 DEBUG(1, ("tevent_add_fd failed\n"));
1591 TALLOC_CTX
*frame
= talloc_stackframe();
1593 ret
= tevent_loop_once(winbind_event_context());
1595 DEBUG(1, ("tevent_loop_once failed: %s\n",
1600 if (child
->domain
&& child
->domain
->startup
&&
1601 (time_mono(NULL
) > child
->domain
->startup_time
+ 30)) {
1602 /* No longer in "startup" mode. */
1603 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1604 child
->domain
->name
));
1605 child
->domain
->startup
= False
;
1612 void winbind_msg_ip_dropped_parent(struct messaging_context
*msg_ctx
,
1615 struct server_id server_id
,
1618 struct winbindd_child
*child
;
1620 winbind_msg_ip_dropped(msg_ctx
, private_data
, msg_type
,
1624 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
1625 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
1626 msg_type
, data
->data
, data
->length
);