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"
43 #define DBGC_CLASS DBGC_WINBIND
45 extern bool override_logfile
;
47 static struct winbindd_child
*winbindd_children
= NULL
;
49 /* Read some data from a client connection */
51 static NTSTATUS
child_read_request(int sock
, struct winbindd_request
*wreq
)
55 status
= read_data(sock
, (char *)wreq
, sizeof(*wreq
));
56 if (!NT_STATUS_IS_OK(status
)) {
57 DEBUG(3, ("child_read_request: read_data failed: %s\n",
62 if (wreq
->extra_len
== 0) {
63 wreq
->extra_data
.data
= NULL
;
67 DEBUG(10, ("Need to read %d extra bytes\n", (int)wreq
->extra_len
));
69 wreq
->extra_data
.data
= SMB_MALLOC_ARRAY(char, wreq
->extra_len
+ 1);
70 if (wreq
->extra_data
.data
== NULL
) {
71 DEBUG(0, ("malloc failed\n"));
72 return NT_STATUS_NO_MEMORY
;
75 /* Ensure null termination */
76 wreq
->extra_data
.data
[wreq
->extra_len
] = '\0';
78 status
= read_data(sock
, wreq
->extra_data
.data
, wreq
->extra_len
);
79 if (!NT_STATUS_IS_OK(status
)) {
80 DEBUG(0, ("Could not read extra data: %s\n",
86 static NTSTATUS
child_write_response(int sock
, struct winbindd_response
*wrsp
)
91 iov
[0].iov_base
= (void *)wrsp
;
92 iov
[0].iov_len
= sizeof(struct winbindd_response
);
95 if (wrsp
->length
> sizeof(struct winbindd_response
)) {
96 iov
[1].iov_base
= (void *)wrsp
->extra_data
.data
;
97 iov
[1].iov_len
= wrsp
->length
-iov
[0].iov_len
;
101 DEBUG(10, ("Writing %d bytes to parent\n", (int)wrsp
->length
));
103 if (write_data_iov(sock
, iov
, iov_count
) != wrsp
->length
) {
104 DEBUG(0, ("Could not write result\n"));
105 return NT_STATUS_INVALID_HANDLE
;
112 * Do winbind child async request. This is not simply wb_simple_trans. We have
113 * to do the queueing ourselves because while a request is queued, the child
114 * might have crashed, and we have to re-fork it in the _trigger function.
117 struct wb_child_request_state
{
118 struct tevent_context
*ev
;
119 struct winbindd_child
*child
;
120 struct winbindd_request
*request
;
121 struct winbindd_response
*response
;
124 static bool fork_domain_child(struct winbindd_child
*child
);
126 static void wb_child_request_trigger(struct tevent_req
*req
,
128 static void wb_child_request_done(struct tevent_req
*subreq
);
130 struct tevent_req
*wb_child_request_send(TALLOC_CTX
*mem_ctx
,
131 struct tevent_context
*ev
,
132 struct winbindd_child
*child
,
133 struct winbindd_request
*request
)
135 struct tevent_req
*req
;
136 struct wb_child_request_state
*state
;
138 req
= tevent_req_create(mem_ctx
, &state
,
139 struct wb_child_request_state
);
145 state
->child
= child
;
146 state
->request
= request
;
148 if (!tevent_queue_add(child
->queue
, ev
, req
,
149 wb_child_request_trigger
, NULL
)) {
151 return tevent_req_post(req
, ev
);
156 static void wb_child_request_trigger(struct tevent_req
*req
,
159 struct wb_child_request_state
*state
= tevent_req_data(
160 req
, struct wb_child_request_state
);
161 struct tevent_req
*subreq
;
163 if ((state
->child
->sock
== -1) && (!fork_domain_child(state
->child
))) {
164 tevent_req_error(req
, errno
);
168 subreq
= wb_simple_trans_send(state
, winbind_event_context(), NULL
,
169 state
->child
->sock
, state
->request
);
170 if (tevent_req_nomem(subreq
, req
)) {
173 tevent_req_set_callback(subreq
, wb_child_request_done
, req
);
174 tevent_req_set_endtime(req
, state
->ev
, timeval_current_ofs(300, 0));
177 static void wb_child_request_done(struct tevent_req
*subreq
)
179 struct tevent_req
*req
= tevent_req_callback_data(
180 subreq
, struct tevent_req
);
181 struct wb_child_request_state
*state
= tevent_req_data(
182 req
, struct wb_child_request_state
);
185 ret
= wb_simple_trans_recv(subreq
, state
, &state
->response
, &err
);
189 * The basic parent/child communication broke, close
192 close(state
->child
->sock
);
193 state
->child
->sock
= -1;
194 DLIST_REMOVE(winbindd_children
, state
->child
);
195 tevent_req_error(req
, err
);
198 tevent_req_done(req
);
201 int wb_child_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
202 struct winbindd_response
**presponse
, int *err
)
204 struct wb_child_request_state
*state
= tevent_req_data(
205 req
, struct wb_child_request_state
);
207 if (tevent_req_is_unix_error(req
, err
)) {
210 *presponse
= talloc_move(mem_ctx
, &state
->response
);
214 static bool winbindd_child_busy(struct winbindd_child
*child
)
216 return tevent_queue_length(child
->queue
) > 0;
219 static struct winbindd_child
*find_idle_child(struct winbindd_domain
*domain
)
223 for (i
=0; i
<lp_winbind_max_domain_connections(); i
++) {
224 if (!winbindd_child_busy(&domain
->children
[i
])) {
225 return &domain
->children
[i
];
232 struct winbindd_child
*choose_domain_child(struct winbindd_domain
*domain
)
234 struct winbindd_child
*result
;
236 result
= find_idle_child(domain
);
237 if (result
!= NULL
) {
240 return &domain
->children
[rand() % lp_winbind_max_domain_connections()];
243 struct dcerpc_binding_handle
*dom_child_handle(struct winbindd_domain
*domain
)
245 struct winbindd_child
*child
;
247 child
= choose_domain_child(domain
);
248 return child
->binding_handle
;
251 struct wb_domain_request_state
{
252 struct tevent_context
*ev
;
253 struct winbindd_domain
*domain
;
254 struct winbindd_child
*child
;
255 struct winbindd_request
*request
;
256 struct winbindd_request
*init_req
;
257 struct winbindd_response
*response
;
260 static void wb_domain_request_gotdc(struct tevent_req
*subreq
);
261 static void wb_domain_request_initialized(struct tevent_req
*subreq
);
262 static void wb_domain_request_done(struct tevent_req
*subreq
);
264 struct tevent_req
*wb_domain_request_send(TALLOC_CTX
*mem_ctx
,
265 struct tevent_context
*ev
,
266 struct winbindd_domain
*domain
,
267 struct winbindd_request
*request
)
269 struct tevent_req
*req
, *subreq
;
270 struct wb_domain_request_state
*state
;
272 req
= tevent_req_create(mem_ctx
, &state
,
273 struct wb_domain_request_state
);
278 state
->child
= choose_domain_child(domain
);
280 if (domain
->initialized
) {
281 subreq
= wb_child_request_send(state
, ev
, state
->child
,
283 if (tevent_req_nomem(subreq
, req
)) {
284 return tevent_req_post(req
, ev
);
286 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
290 state
->domain
= domain
;
292 state
->request
= request
;
294 state
->init_req
= talloc_zero(state
, struct winbindd_request
);
295 if (tevent_req_nomem(state
->init_req
, req
)) {
296 return tevent_req_post(req
, ev
);
299 if (IS_DC
|| domain
->primary
|| domain
->internal
) {
300 /* The primary domain has to find the DC name itself */
301 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
302 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
303 state
->init_req
->data
.init_conn
.is_primary
= domain
->primary
;
304 fstrcpy(state
->init_req
->data
.init_conn
.dcname
, "");
306 subreq
= wb_child_request_send(state
, ev
, state
->child
,
308 if (tevent_req_nomem(subreq
, req
)) {
309 return tevent_req_post(req
, ev
);
311 tevent_req_set_callback(subreq
, wb_domain_request_initialized
,
317 * Ask our DC for a DC name
319 domain
= find_our_domain();
321 /* This is *not* the primary domain, let's ask our DC about a DC
324 state
->init_req
->cmd
= WINBINDD_GETDCNAME
;
325 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
327 subreq
= wb_child_request_send(state
, ev
, state
->child
, request
);
328 if (tevent_req_nomem(subreq
, req
)) {
329 return tevent_req_post(req
, ev
);
331 tevent_req_set_callback(subreq
, wb_domain_request_gotdc
, req
);
335 static void wb_domain_request_gotdc(struct tevent_req
*subreq
)
337 struct tevent_req
*req
= tevent_req_callback_data(
338 subreq
, struct tevent_req
);
339 struct wb_domain_request_state
*state
= tevent_req_data(
340 req
, struct wb_domain_request_state
);
341 struct winbindd_response
*response
;
344 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
347 tevent_req_error(req
, err
);
350 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
351 fstrcpy(state
->init_req
->domain_name
, state
->domain
->name
);
352 state
->init_req
->data
.init_conn
.is_primary
= False
;
353 fstrcpy(state
->init_req
->data
.init_conn
.dcname
,
354 response
->data
.dc_name
);
356 TALLOC_FREE(response
);
358 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
360 if (tevent_req_nomem(subreq
, req
)) {
363 tevent_req_set_callback(subreq
, wb_domain_request_initialized
, req
);
366 static void wb_domain_request_initialized(struct tevent_req
*subreq
)
368 struct tevent_req
*req
= tevent_req_callback_data(
369 subreq
, struct tevent_req
);
370 struct wb_domain_request_state
*state
= tevent_req_data(
371 req
, struct wb_domain_request_state
);
372 struct winbindd_response
*response
;
375 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
378 tevent_req_error(req
, err
);
382 if (!string_to_sid(&state
->domain
->sid
,
383 response
->data
.domain_info
.sid
)) {
384 DEBUG(1,("init_child_recv: Could not convert sid %s "
385 "from string\n", response
->data
.domain_info
.sid
));
386 tevent_req_error(req
, EINVAL
);
390 talloc_free(state
->domain
->name
);
391 state
->domain
->name
= talloc_strdup(state
->domain
,
392 response
->data
.domain_info
.name
);
393 if (state
->domain
->name
== NULL
) {
394 tevent_req_error(req
, ENOMEM
);
398 if (response
->data
.domain_info
.alt_name
[0] != '\0') {
399 talloc_free(state
->domain
->alt_name
);
401 state
->domain
->alt_name
= talloc_strdup(state
->domain
,
402 response
->data
.domain_info
.alt_name
);
403 if (state
->domain
->alt_name
== NULL
) {
404 tevent_req_error(req
, ENOMEM
);
409 state
->domain
->native_mode
= response
->data
.domain_info
.native_mode
;
410 state
->domain
->active_directory
=
411 response
->data
.domain_info
.active_directory
;
412 state
->domain
->initialized
= true;
414 TALLOC_FREE(response
);
416 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
418 if (tevent_req_nomem(subreq
, req
)) {
421 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
424 static void wb_domain_request_done(struct tevent_req
*subreq
)
426 struct tevent_req
*req
= tevent_req_callback_data(
427 subreq
, struct tevent_req
);
428 struct wb_domain_request_state
*state
= tevent_req_data(
429 req
, struct wb_domain_request_state
);
432 ret
= wb_child_request_recv(subreq
, talloc_tos(), &state
->response
,
436 tevent_req_error(req
, err
);
439 tevent_req_done(req
);
442 int wb_domain_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
443 struct winbindd_response
**presponse
, int *err
)
445 struct wb_domain_request_state
*state
= tevent_req_data(
446 req
, struct wb_domain_request_state
);
448 if (tevent_req_is_unix_error(req
, err
)) {
451 *presponse
= talloc_move(mem_ctx
, &state
->response
);
455 static void child_process_request(struct winbindd_child
*child
,
456 struct winbindd_cli_state
*state
)
458 struct winbindd_domain
*domain
= child
->domain
;
459 const struct winbindd_child_dispatch_table
*table
= child
->table
;
461 /* Free response data - we may be interrupted and receive another
462 command before being able to send this data off. */
464 state
->response
->result
= WINBINDD_ERROR
;
465 state
->response
->length
= sizeof(struct winbindd_response
);
467 /* as all requests in the child are sync, we can use talloc_tos() */
468 state
->mem_ctx
= talloc_tos();
470 /* Process command */
472 for (; table
->name
; table
++) {
473 if (state
->request
->cmd
== table
->struct_cmd
) {
474 DEBUG(10,("child_process_request: request fn %s\n",
476 state
->response
->result
= table
->struct_fn(domain
, state
);
481 DEBUG(1, ("child_process_request: unknown request fn number %d\n",
482 (int)state
->request
->cmd
));
483 state
->response
->result
= WINBINDD_ERROR
;
486 void setup_child(struct winbindd_domain
*domain
, struct winbindd_child
*child
,
487 const struct winbindd_child_dispatch_table
*table
,
488 const char *logprefix
,
491 if (logprefix
&& logname
) {
492 char *logbase
= NULL
;
494 if (*lp_logfile(talloc_tos())) {
497 if (asprintf(&logbase
, "%s", lp_logfile(talloc_tos())) < 0) {
498 smb_panic("Internal error: asprintf failed");
501 if ((end
= strrchr_m(logbase
, '/'))) {
505 if (asprintf(&logbase
, "%s", get_dyn_LOGFILEBASE()) < 0) {
506 smb_panic("Internal error: asprintf failed");
510 if (asprintf(&child
->logfilename
, "%s/%s-%s",
511 logbase
, logprefix
, logname
) < 0) {
513 smb_panic("Internal error: asprintf failed");
518 smb_panic("Internal error: logprefix == NULL && "
523 child
->domain
= domain
;
524 child
->table
= table
;
525 child
->queue
= tevent_queue_create(NULL
, "winbind_child");
526 SMB_ASSERT(child
->queue
!= NULL
);
527 child
->binding_handle
= wbint_binding_handle(NULL
, domain
, child
);
528 SMB_ASSERT(child
->binding_handle
!= NULL
);
531 void winbind_child_died(pid_t pid
)
533 struct winbindd_child
*child
;
535 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
536 if (child
->pid
== pid
) {
542 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid
));
546 /* This will be re-added in fork_domain_child() */
548 DLIST_REMOVE(winbindd_children
, child
);
551 if (child
->sock
!= -1) {
557 /* Ensure any negative cache entries with the netbios or realm names are removed. */
559 void winbindd_flush_negative_conn_cache(struct winbindd_domain
*domain
)
561 flush_negative_conn_cache_for_domain(domain
->name
);
562 if (domain
->alt_name
!= NULL
) {
563 flush_negative_conn_cache_for_domain(domain
->alt_name
);
568 * Parent winbindd process sets its own debug level first and then
569 * sends a message to all the winbindd children to adjust their debug
570 * level to that of parents.
573 void winbind_msg_debug(struct messaging_context
*msg_ctx
,
576 struct server_id server_id
,
579 struct winbindd_child
*child
;
581 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
583 debug_message(msg_ctx
, private_data
, MSG_DEBUG
, server_id
, data
);
585 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
587 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
588 (unsigned int)child
->pid
));
590 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
593 strlen((char *) data
->data
) + 1);
597 /* Set our domains as offline and forward the offline message to our children. */
599 void winbind_msg_offline(struct messaging_context
*msg_ctx
,
602 struct server_id server_id
,
605 struct winbindd_child
*child
;
606 struct winbindd_domain
*domain
;
608 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
610 if (!lp_winbind_offline_logon()) {
611 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
615 /* Set our global state as offline. */
616 if (!set_global_winbindd_state_offline()) {
617 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
621 /* Set all our domains as offline. */
622 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
623 if (domain
->internal
) {
626 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain
->name
));
627 set_domain_offline(domain
);
630 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
631 /* Don't send message to internal children. We've already
633 if (!child
->domain
|| winbindd_internal_child(child
)) {
637 /* Or internal domains (this should not be possible....) */
638 if (child
->domain
->internal
) {
642 /* Each winbindd child should only process requests for one domain - make sure
643 we only set it online / offline for that domain. */
645 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
646 (unsigned int)child
->pid
, child
->domain
->name
));
648 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
650 (const uint8_t *)child
->domain
->name
,
651 strlen(child
->domain
->name
)+1);
655 /* Set our domains as online and forward the online message to our children. */
657 void winbind_msg_online(struct messaging_context
*msg_ctx
,
660 struct server_id server_id
,
663 struct winbindd_child
*child
;
664 struct winbindd_domain
*domain
;
666 DEBUG(10,("winbind_msg_online: got online message.\n"));
668 if (!lp_winbind_offline_logon()) {
669 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
673 /* Set our global state as online. */
674 set_global_winbindd_state_online();
676 smb_nscd_flush_user_cache();
677 smb_nscd_flush_group_cache();
679 /* Set all our domains as online. */
680 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
681 if (domain
->internal
) {
684 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain
->name
));
686 winbindd_flush_negative_conn_cache(domain
);
687 set_domain_online_request(domain
);
689 /* Send an online message to the idmap child when our
690 primary domain comes back online */
692 if ( domain
->primary
) {
693 struct winbindd_child
*idmap
= idmap_child();
695 if ( idmap
->pid
!= 0 ) {
696 messaging_send_buf(msg_ctx
,
697 pid_to_procid(idmap
->pid
),
699 (const uint8_t *)domain
->name
,
700 strlen(domain
->name
)+1);
705 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
706 /* Don't send message to internal childs. */
707 if (!child
->domain
|| winbindd_internal_child(child
)) {
711 /* Or internal domains (this should not be possible....) */
712 if (child
->domain
->internal
) {
716 /* Each winbindd child should only process requests for one domain - make sure
717 we only set it online / offline for that domain. */
719 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
720 (unsigned int)child
->pid
, child
->domain
->name
));
722 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
724 (const uint8_t *)child
->domain
->name
,
725 strlen(child
->domain
->name
)+1);
729 static const char *collect_onlinestatus(TALLOC_CTX
*mem_ctx
)
731 struct winbindd_domain
*domain
;
734 if ((buf
= talloc_asprintf(mem_ctx
, "global:%s ",
735 get_global_winbindd_state_offline() ?
736 "Offline":"Online")) == NULL
) {
740 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
741 if ((buf
= talloc_asprintf_append_buffer(buf
, "%s:%s ",
744 "Online":"Offline")) == NULL
) {
749 buf
= talloc_asprintf_append_buffer(buf
, "\n");
751 DEBUG(5,("collect_onlinestatus: %s", buf
));
756 void winbind_msg_onlinestatus(struct messaging_context
*msg_ctx
,
759 struct server_id server_id
,
764 struct server_id
*sender
;
766 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
772 sender
= (struct server_id
*)data
->data
;
774 mem_ctx
= talloc_init("winbind_msg_onlinestatus");
775 if (mem_ctx
== NULL
) {
779 message
= collect_onlinestatus(mem_ctx
);
780 if (message
== NULL
) {
781 talloc_destroy(mem_ctx
);
785 messaging_send_buf(msg_ctx
, *sender
, MSG_WINBIND_ONLINESTATUS
,
786 (const uint8
*)message
, strlen(message
) + 1);
788 talloc_destroy(mem_ctx
);
791 void winbind_msg_dump_event_list(struct messaging_context
*msg_ctx
,
794 struct server_id server_id
,
797 struct winbindd_child
*child
;
799 DEBUG(10,("winbind_msg_dump_event_list received\n"));
801 dump_event_list(winbind_event_context());
803 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
805 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
806 (unsigned int)child
->pid
));
808 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
815 void winbind_msg_dump_domain_list(struct messaging_context
*msg_ctx
,
818 struct server_id server_id
,
822 const char *message
= NULL
;
823 struct server_id
*sender
= NULL
;
824 const char *domain
= NULL
;
827 struct winbindd_domain
*dom
= NULL
;
829 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
831 if (!data
|| !data
->data
) {
835 if (data
->length
< sizeof(struct server_id
)) {
839 mem_ctx
= talloc_init("winbind_msg_dump_domain_list");
844 sender
= (struct server_id
*)data
->data
;
845 if (data
->length
> sizeof(struct server_id
)) {
846 domain
= (const char *)data
->data
+sizeof(struct server_id
);
851 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
854 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
,
855 find_domain_from_name_noinit(domain
));
857 talloc_destroy(mem_ctx
);
861 messaging_send_buf(msg_ctx
, *sender
,
862 MSG_WINBIND_DUMP_DOMAIN_LIST
,
863 (const uint8_t *)message
, strlen(message
) + 1);
865 talloc_destroy(mem_ctx
);
870 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
872 for (dom
= domain_list(); dom
; dom
=dom
->next
) {
873 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
, dom
);
875 talloc_destroy(mem_ctx
);
879 s
= talloc_asprintf_append(s
, "%s\n", message
);
881 talloc_destroy(mem_ctx
);
886 status
= messaging_send_buf(msg_ctx
, *sender
,
887 MSG_WINBIND_DUMP_DOMAIN_LIST
,
888 (uint8_t *)s
, strlen(s
) + 1);
889 if (!NT_STATUS_IS_OK(status
)) {
890 DEBUG(0,("failed to send message: %s\n",
894 talloc_destroy(mem_ctx
);
897 static void account_lockout_policy_handler(struct tevent_context
*ctx
,
898 struct tevent_timer
*te
,
902 struct winbindd_child
*child
=
903 (struct winbindd_child
*)private_data
;
904 TALLOC_CTX
*mem_ctx
= NULL
;
905 struct winbindd_methods
*methods
;
906 struct samr_DomInfo12 lockout_policy
;
909 DEBUG(10,("account_lockout_policy_handler called\n"));
911 TALLOC_FREE(child
->lockout_policy_event
);
913 if ( !winbindd_can_contact_domain( child
->domain
) ) {
914 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
915 "do not have an incoming trust to domain %s\n",
916 child
->domain
->name
));
921 methods
= child
->domain
->methods
;
923 mem_ctx
= talloc_init("account_lockout_policy_handler ctx");
925 result
= NT_STATUS_NO_MEMORY
;
927 result
= methods
->lockout_policy(child
->domain
, mem_ctx
, &lockout_policy
);
929 TALLOC_FREE(mem_ctx
);
931 if (!NT_STATUS_IS_OK(result
)) {
932 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
936 child
->lockout_policy_event
= tevent_add_timer(winbind_event_context(), NULL
,
937 timeval_current_ofs(3600, 0),
938 account_lockout_policy_handler
,
942 static time_t get_machine_password_timeout(void)
944 /* until we have gpo support use lp setting */
945 return lp_machine_password_timeout();
948 static bool calculate_next_machine_pwd_change(const char *domain
,
951 time_t pass_last_set_time
;
957 pw
= secrets_fetch_machine_password(domain
,
962 DEBUG(0,("cannot fetch own machine password ????"));
968 timeout
= get_machine_password_timeout();
970 DEBUG(10,("machine password never expires\n"));
974 tv
.tv_sec
= pass_last_set_time
;
975 DEBUG(10, ("password last changed %s\n",
976 timeval_string(talloc_tos(), &tv
, false)));
977 tv
.tv_sec
+= timeout
;
978 DEBUGADD(10, ("password valid until %s\n",
979 timeval_string(talloc_tos(), &tv
, false)));
981 if (time(NULL
) < (pass_last_set_time
+ timeout
)) {
982 next_change
= pass_last_set_time
+ timeout
;
983 DEBUG(10,("machine password still valid until: %s\n",
984 http_timestring(talloc_tos(), next_change
)));
985 *t
= timeval_set(next_change
, 0);
987 if (lp_clustering()) {
990 * When having a cluster, we have several
991 * winbinds racing for the password change. In
992 * the machine_password_change_handler()
993 * function we check if someone else was
994 * faster when the event triggers. We add a
995 * 255-second random delay here, so that we
996 * don't run to change the password at the
999 generate_random_buffer(&randbuf
, sizeof(randbuf
));
1000 DEBUG(10, ("adding %d seconds randomness\n",
1002 t
->tv_sec
+= randbuf
;
1007 DEBUG(10,("machine password expired, needs immediate change\n"));
1009 *t
= timeval_zero();
1014 static void machine_password_change_handler(struct tevent_context
*ctx
,
1015 struct tevent_timer
*te
,
1019 struct messaging_context
*msg_ctx
= winbind_messaging_context();
1020 struct winbindd_child
*child
=
1021 (struct winbindd_child
*)private_data
;
1022 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
1024 struct timeval next_change
;
1026 DEBUG(10,("machine_password_change_handler called\n"));
1028 TALLOC_FREE(child
->machine_password_change_event
);
1030 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
1032 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1036 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1037 timeval_string(talloc_tos(), &next_change
, false)));
1039 if (!timeval_expired(&next_change
)) {
1040 DEBUG(10, ("Someone else has already changed the pw\n"));
1044 if (!winbindd_can_contact_domain(child
->domain
)) {
1045 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1046 "do not have an incoming trust to domain %s\n",
1047 child
->domain
->name
));
1051 result
= cm_connect_netlogon(child
->domain
, &netlogon_pipe
);
1052 if (!NT_STATUS_IS_OK(result
)) {
1053 DEBUG(10,("machine_password_change_handler: "
1054 "failed to connect netlogon pipe: %s\n",
1055 nt_errstr(result
)));
1059 result
= trust_pw_change(child
->domain
->conn
.netlogon_creds
,
1061 netlogon_pipe
->binding_handle
,
1062 child
->domain
->name
,
1065 DEBUG(10, ("machine_password_change_handler: "
1066 "trust_pw_change returned %s\n",
1067 nt_errstr(result
)));
1069 if (NT_STATUS_EQUAL(result
, NT_STATUS_ACCESS_DENIED
) ) {
1070 DEBUG(3,("machine_password_change_handler: password set returned "
1071 "ACCESS_DENIED. Maybe the trust account "
1072 "password was changed and we didn't know it. "
1073 "Killing connections to domain %s\n",
1074 child
->domain
->name
));
1075 invalidate_cm_connection(child
->domain
);
1078 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
1080 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1084 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1085 timeval_string(talloc_tos(), &next_change
, false)));
1087 if (!NT_STATUS_IS_OK(result
)) {
1090 * In case of failure, give the DC a minute to recover
1092 tmp
= timeval_current_ofs(60, 0);
1093 next_change
= timeval_max(&next_change
, &tmp
);
1097 child
->machine_password_change_event
= tevent_add_timer(winbind_event_context(), NULL
,
1099 machine_password_change_handler
,
1103 /* Deal with a request to go offline. */
1105 static void child_msg_offline(struct messaging_context
*msg
,
1108 struct server_id server_id
,
1111 struct winbindd_domain
*domain
;
1112 struct winbindd_domain
*primary_domain
= NULL
;
1113 const char *domainname
= (const char *)data
->data
;
1115 if (data
->data
== NULL
|| data
->length
== 0) {
1119 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname
));
1121 if (!lp_winbind_offline_logon()) {
1122 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1126 primary_domain
= find_our_domain();
1128 /* Mark the requested domain offline. */
1130 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1131 if (domain
->internal
) {
1134 if (strequal(domain
->name
, domainname
)) {
1135 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain
->name
));
1136 set_domain_offline(domain
);
1137 /* we are in the trusted domain, set the primary domain
1139 if (domain
!= primary_domain
) {
1140 set_domain_offline(primary_domain
);
1146 /* Deal with a request to go online. */
1148 static void child_msg_online(struct messaging_context
*msg
,
1151 struct server_id server_id
,
1154 struct winbindd_domain
*domain
;
1155 struct winbindd_domain
*primary_domain
= NULL
;
1156 const char *domainname
= (const char *)data
->data
;
1158 if (data
->data
== NULL
|| data
->length
== 0) {
1162 DEBUG(5,("child_msg_online received for domain %s.\n", domainname
));
1164 if (!lp_winbind_offline_logon()) {
1165 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1169 primary_domain
= find_our_domain();
1171 /* Set our global state as online. */
1172 set_global_winbindd_state_online();
1174 /* Try and mark everything online - delete any negative cache entries
1175 to force a reconnect now. */
1177 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1178 if (domain
->internal
) {
1181 if (strequal(domain
->name
, domainname
)) {
1182 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain
->name
));
1183 winbindd_flush_negative_conn_cache(domain
);
1184 set_domain_online_request(domain
);
1186 /* we can be in trusted domain, which will contact primary domain
1187 * we have to bring primary domain online in trusted domain process
1188 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1189 * --> contact_domain = find_our_domain()
1191 if (domain
!= primary_domain
) {
1192 winbindd_flush_negative_conn_cache(primary_domain
);
1193 set_domain_online_request(primary_domain
);
1199 static void child_msg_dump_event_list(struct messaging_context
*msg
,
1202 struct server_id server_id
,
1205 DEBUG(5,("child_msg_dump_event_list received\n"));
1207 dump_event_list(winbind_event_context());
1210 NTSTATUS
winbindd_reinit_after_fork(const struct winbindd_child
*myself
,
1211 const char *logfilename
)
1213 struct winbindd_domain
*domain
;
1214 struct winbindd_child
*cl
;
1217 status
= reinit_after_fork(
1218 winbind_messaging_context(),
1219 winbind_event_context(),
1221 if (!NT_STATUS_IS_OK(status
)) {
1222 DEBUG(0,("reinit_after_fork() failed\n"));
1226 close_conns_after_fork();
1228 if (!override_logfile
&& logfilename
) {
1229 lp_set_logfile(logfilename
);
1233 if (!winbindd_setup_sig_term_handler(false))
1234 return NT_STATUS_NO_MEMORY
;
1235 if (!winbindd_setup_sig_hup_handler(override_logfile
? NULL
:
1237 return NT_STATUS_NO_MEMORY
;
1239 /* Stop zombies in children */
1242 /* Don't handle the same messages as our parent. */
1243 messaging_deregister(winbind_messaging_context(),
1244 MSG_SMB_CONF_UPDATED
, NULL
);
1245 messaging_deregister(winbind_messaging_context(),
1246 MSG_SHUTDOWN
, NULL
);
1247 messaging_deregister(winbind_messaging_context(),
1248 MSG_WINBIND_OFFLINE
, NULL
);
1249 messaging_deregister(winbind_messaging_context(),
1250 MSG_WINBIND_ONLINE
, NULL
);
1251 messaging_deregister(winbind_messaging_context(),
1252 MSG_WINBIND_ONLINESTATUS
, NULL
);
1253 messaging_deregister(winbind_messaging_context(),
1254 MSG_DUMP_EVENT_LIST
, NULL
);
1255 messaging_deregister(winbind_messaging_context(),
1256 MSG_WINBIND_DUMP_DOMAIN_LIST
, NULL
);
1257 messaging_deregister(winbind_messaging_context(),
1260 messaging_deregister(winbind_messaging_context(),
1261 MSG_WINBIND_DOMAIN_OFFLINE
, NULL
);
1262 messaging_deregister(winbind_messaging_context(),
1263 MSG_WINBIND_DOMAIN_ONLINE
, NULL
);
1265 /* We have destroyed all events in the winbindd_event_context
1266 * in reinit_after_fork(), so clean out all possible pending
1267 * event pointers. */
1269 /* Deal with check_online_events. */
1271 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1272 TALLOC_FREE(domain
->check_online_event
);
1275 /* Ensure we're not handling a credential cache event inherited
1276 * from our parent. */
1278 ccache_remove_all_after_fork();
1280 /* Destroy all possible events in child list. */
1281 for (cl
= winbindd_children
; cl
!= NULL
; cl
= cl
->next
) {
1282 TALLOC_FREE(cl
->lockout_policy_event
);
1283 TALLOC_FREE(cl
->machine_password_change_event
);
1285 /* Children should never be able to send
1286 * each other messages, all messages must
1287 * go through the parent.
1292 * Close service sockets to all other children
1294 if ((cl
!= myself
) && (cl
->sock
!= -1)) {
1300 * This is a little tricky, children must not
1301 * send an MSG_WINBIND_ONLINE message to idmap_child().
1302 * If we are in a child of our primary domain or
1303 * in the process created by fork_child_dc_connect(),
1304 * and the primary domain cannot go online,
1305 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1306 * periodically to idmap_child().
1308 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1309 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1310 * ---> init_dc_connection() ---> cm_open_connection --->
1311 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1312 * idmap_child(). Disallow children sending messages
1313 * to each other, all messages must go through the parent.
1318 return NT_STATUS_OK
;
1322 * In a child there will be only one domain, reference that here.
1324 static struct winbindd_domain
*child_domain
;
1326 struct winbindd_domain
*wb_child_domain(void)
1328 return child_domain
;
1331 struct child_handler_state
{
1332 struct winbindd_child
*child
;
1333 struct winbindd_cli_state cli
;
1336 static void child_handler(struct tevent_context
*ev
, struct tevent_fd
*fde
,
1337 uint16_t flags
, void *private_data
)
1339 struct child_handler_state
*state
=
1340 (struct child_handler_state
*)private_data
;
1343 /* fetch a request from the main daemon */
1344 status
= child_read_request(state
->cli
.sock
, state
->cli
.request
);
1346 if (!NT_STATUS_IS_OK(status
)) {
1347 /* we lost contact with our parent */
1351 DEBUG(4,("child daemon request %d\n",
1352 (int)state
->cli
.request
->cmd
));
1354 ZERO_STRUCTP(state
->cli
.response
);
1355 state
->cli
.request
->null_term
= '\0';
1356 state
->cli
.mem_ctx
= talloc_tos();
1357 child_process_request(state
->child
, &state
->cli
);
1359 DEBUG(4, ("Finished processing child request %d\n",
1360 (int)state
->cli
.request
->cmd
));
1362 SAFE_FREE(state
->cli
.request
->extra_data
.data
);
1364 status
= child_write_response(state
->cli
.sock
, state
->cli
.response
);
1365 if (!NT_STATUS_IS_OK(status
)) {
1370 static bool fork_domain_child(struct winbindd_child
*child
)
1373 struct child_handler_state state
;
1374 struct winbindd_request request
;
1375 struct winbindd_response response
;
1376 struct winbindd_domain
*primary_domain
= NULL
;
1379 struct tevent_fd
*fde
;
1381 if (child
->domain
) {
1382 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1383 child
->domain
->name
));
1385 DEBUG(10, ("fork_domain_child called without domain.\n"));
1388 if (socketpair(AF_UNIX
, SOCK_STREAM
, 0, fdpair
) != 0) {
1389 DEBUG(0, ("Could not open child pipe: %s\n",
1395 state
.child
= child
;
1396 state
.cli
.pid
= getpid();
1397 state
.cli
.request
= &request
;
1398 state
.cli
.response
= &response
;
1400 child
->pid
= fork();
1402 if (child
->pid
== -1) {
1403 DEBUG(0, ("Could not fork: %s\n", strerror(errno
)));
1409 if (child
->pid
!= 0) {
1415 nread
= sys_read(fdpair
[1], &status
, sizeof(status
));
1416 if (nread
!= sizeof(status
)) {
1417 DEBUG(1, ("fork_domain_child: Could not read child status: "
1418 "nread=%d, error=%s\n", (int)nread
,
1423 if (!NT_STATUS_IS_OK(status
)) {
1424 DEBUG(1, ("fork_domain_child: Child status is %s\n",
1425 nt_errstr(status
)));
1430 child
->next
= child
->prev
= NULL
;
1431 DLIST_ADD(winbindd_children
, child
);
1432 child
->sock
= fdpair
[1];
1437 child_domain
= child
->domain
;
1439 DEBUG(10, ("Child process %d\n", (int)getpid()));
1441 state
.cli
.sock
= fdpair
[0];
1444 status
= winbindd_reinit_after_fork(child
, child
->logfilename
);
1446 nwritten
= sys_write(state
.cli
.sock
, &status
, sizeof(status
));
1447 if (nwritten
!= sizeof(status
)) {
1448 DEBUG(1, ("fork_domain_child: Could not write status: "
1449 "nwritten=%d, error=%s\n", (int)nwritten
,
1453 if (!NT_STATUS_IS_OK(status
)) {
1454 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
1455 nt_errstr(status
)));
1459 /* Handle online/offline messages. */
1460 messaging_register(winbind_messaging_context(), NULL
,
1461 MSG_WINBIND_OFFLINE
, child_msg_offline
);
1462 messaging_register(winbind_messaging_context(), NULL
,
1463 MSG_WINBIND_ONLINE
, child_msg_online
);
1464 messaging_register(winbind_messaging_context(), NULL
,
1465 MSG_DUMP_EVENT_LIST
, child_msg_dump_event_list
);
1466 messaging_register(winbind_messaging_context(), NULL
,
1467 MSG_DEBUG
, debug_message
);
1468 messaging_register(winbind_messaging_context(), NULL
,
1469 MSG_WINBIND_IP_DROPPED
,
1470 winbind_msg_ip_dropped
);
1473 primary_domain
= find_our_domain();
1475 if (primary_domain
== NULL
) {
1476 smb_panic("no primary domain found");
1479 /* It doesn't matter if we allow cache login,
1480 * try to bring domain online after fork. */
1481 if ( child
->domain
) {
1482 child
->domain
->startup
= True
;
1483 child
->domain
->startup_time
= time_mono(NULL
);
1484 /* we can be in primary domain or in trusted domain
1485 * If we are in trusted domain, set the primary domain
1486 * in start-up mode */
1487 if (!(child
->domain
->internal
)) {
1488 set_domain_online_request(child
->domain
);
1489 if (!(child
->domain
->primary
)) {
1490 primary_domain
->startup
= True
;
1491 primary_domain
->startup_time
= time_mono(NULL
);
1492 set_domain_online_request(primary_domain
);
1498 * We are in idmap child, make sure that we set the
1499 * check_online_event to bring primary domain online.
1501 if (child
== idmap_child()) {
1502 set_domain_online_request(primary_domain
);
1505 /* We might be in the idmap child...*/
1506 if (child
->domain
&& !(child
->domain
->internal
) &&
1507 lp_winbind_offline_logon()) {
1509 set_domain_online_request(child
->domain
);
1511 if (primary_domain
&& (primary_domain
!= child
->domain
)) {
1512 /* We need to talk to the primary
1513 * domain as well as the trusted
1514 * domain inside a trusted domain
1517 * set_dc_type_and_flags_trustinfo()
1520 set_domain_online_request(primary_domain
);
1523 child
->lockout_policy_event
= tevent_add_timer(
1524 winbind_event_context(), NULL
, timeval_zero(),
1525 account_lockout_policy_handler
,
1529 if (child
->domain
&& child
->domain
->primary
&&
1530 !USE_KERBEROS_KEYTAB
&&
1531 lp_server_role() == ROLE_DOMAIN_MEMBER
) {
1533 struct timeval next_change
;
1535 if (calculate_next_machine_pwd_change(child
->domain
->name
,
1537 child
->machine_password_change_event
= tevent_add_timer(
1538 winbind_event_context(), NULL
, next_change
,
1539 machine_password_change_handler
,
1544 fde
= tevent_add_fd(winbind_event_context(), NULL
, state
.cli
.sock
,
1545 TEVENT_FD_READ
, child_handler
, &state
);
1547 DEBUG(1, ("tevent_add_fd failed\n"));
1554 TALLOC_CTX
*frame
= talloc_stackframe();
1556 ret
= tevent_loop_once(winbind_event_context());
1558 DEBUG(1, ("tevent_loop_once failed: %s\n",
1563 if (child
->domain
&& child
->domain
->startup
&&
1564 (time_mono(NULL
) > child
->domain
->startup_time
+ 30)) {
1565 /* No longer in "startup" mode. */
1566 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1567 child
->domain
->name
));
1568 child
->domain
->startup
= False
;
1575 void winbind_msg_ip_dropped_parent(struct messaging_context
*msg_ctx
,
1578 struct server_id server_id
,
1581 struct winbindd_child
*child
;
1583 winbind_msg_ip_dropped(msg_ctx
, private_data
, msg_type
,
1587 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
1588 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
1589 msg_type
, data
->data
, data
->length
);