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 "nsswitch/wb_reqtrans.h"
33 #include "librpc/gen_ndr/messaging.h"
35 #include "../lib/util/select.h"
36 #include "../libcli/security/security.h"
39 #define DBGC_CLASS DBGC_WINBIND
41 extern bool override_logfile
;
42 extern struct winbindd_methods cache_methods
;
44 /* Read some data from a client connection */
46 static NTSTATUS
child_read_request(struct winbindd_cli_state
*state
)
52 status
= read_data(state
->sock
, (char *)state
->request
,
53 sizeof(*state
->request
));
55 if (!NT_STATUS_IS_OK(status
)) {
56 DEBUG(3, ("child_read_request: read_data failed: %s\n",
61 if (state
->request
->extra_len
== 0) {
62 state
->request
->extra_data
.data
= NULL
;
66 DEBUG(10, ("Need to read %d extra bytes\n", (int)state
->request
->extra_len
));
68 state
->request
->extra_data
.data
=
69 SMB_MALLOC_ARRAY(char, state
->request
->extra_len
+ 1);
71 if (state
->request
->extra_data
.data
== NULL
) {
72 DEBUG(0, ("malloc failed\n"));
73 return NT_STATUS_NO_MEMORY
;
76 /* Ensure null termination */
77 state
->request
->extra_data
.data
[state
->request
->extra_len
] = '\0';
79 status
= read_data(state
->sock
, state
->request
->extra_data
.data
,
80 state
->request
->extra_len
);
82 if (!NT_STATUS_IS_OK(status
)) {
83 DEBUG(0, ("Could not read extra data: %s\n",
90 * Do winbind child async request. This is not simply wb_simple_trans. We have
91 * to do the queueing ourselves because while a request is queued, the child
92 * might have crashed, and we have to re-fork it in the _trigger function.
95 struct wb_child_request_state
{
96 struct tevent_context
*ev
;
97 struct winbindd_child
*child
;
98 struct winbindd_request
*request
;
99 struct winbindd_response
*response
;
102 static bool fork_domain_child(struct winbindd_child
*child
);
104 static void wb_child_request_trigger(struct tevent_req
*req
,
106 static void wb_child_request_done(struct tevent_req
*subreq
);
108 struct tevent_req
*wb_child_request_send(TALLOC_CTX
*mem_ctx
,
109 struct tevent_context
*ev
,
110 struct winbindd_child
*child
,
111 struct winbindd_request
*request
)
113 struct tevent_req
*req
;
114 struct wb_child_request_state
*state
;
116 req
= tevent_req_create(mem_ctx
, &state
,
117 struct wb_child_request_state
);
123 state
->child
= child
;
124 state
->request
= request
;
126 if (!tevent_queue_add(child
->queue
, ev
, req
,
127 wb_child_request_trigger
, NULL
)) {
128 tevent_req_nomem(NULL
, req
);
129 return tevent_req_post(req
, ev
);
134 static void wb_child_request_trigger(struct tevent_req
*req
,
137 struct wb_child_request_state
*state
= tevent_req_data(
138 req
, struct wb_child_request_state
);
139 struct tevent_req
*subreq
;
141 if ((state
->child
->sock
== -1) && (!fork_domain_child(state
->child
))) {
142 tevent_req_error(req
, errno
);
146 subreq
= wb_simple_trans_send(state
, winbind_event_context(), NULL
,
147 state
->child
->sock
, state
->request
);
148 if (tevent_req_nomem(subreq
, req
)) {
151 tevent_req_set_callback(subreq
, wb_child_request_done
, req
);
153 if (!tevent_req_set_endtime(req
, state
->ev
,
154 timeval_current_ofs(300, 0))) {
155 tevent_req_nomem(NULL
, req
);
160 static void wb_child_request_done(struct tevent_req
*subreq
)
162 struct tevent_req
*req
= tevent_req_callback_data(
163 subreq
, struct tevent_req
);
164 struct wb_child_request_state
*state
= tevent_req_data(
165 req
, struct wb_child_request_state
);
168 ret
= wb_simple_trans_recv(subreq
, state
, &state
->response
, &err
);
172 * The basic parent/child communication broke, close
175 close(state
->child
->sock
);
176 state
->child
->sock
= -1;
177 tevent_req_error(req
, err
);
180 tevent_req_done(req
);
183 int wb_child_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
184 struct winbindd_response
**presponse
, int *err
)
186 struct wb_child_request_state
*state
= tevent_req_data(
187 req
, struct wb_child_request_state
);
189 if (tevent_req_is_unix_error(req
, err
)) {
192 *presponse
= talloc_move(mem_ctx
, &state
->response
);
196 static bool winbindd_child_busy(struct winbindd_child
*child
)
198 return tevent_queue_length(child
->queue
) > 0;
201 static struct winbindd_child
*find_idle_child(struct winbindd_domain
*domain
)
205 for (i
=0; i
<lp_winbind_max_domain_connections(); i
++) {
206 if (!winbindd_child_busy(&domain
->children
[i
])) {
207 return &domain
->children
[i
];
214 struct winbindd_child
*choose_domain_child(struct winbindd_domain
*domain
)
216 struct winbindd_child
*result
;
218 result
= find_idle_child(domain
);
219 if (result
!= NULL
) {
222 return &domain
->children
[rand() % lp_winbind_max_domain_connections()];
225 struct dcerpc_binding_handle
*dom_child_handle(struct winbindd_domain
*domain
)
227 struct winbindd_child
*child
;
229 child
= choose_domain_child(domain
);
230 return child
->binding_handle
;
233 struct wb_domain_request_state
{
234 struct tevent_context
*ev
;
235 struct winbindd_domain
*domain
;
236 struct winbindd_child
*child
;
237 struct winbindd_request
*request
;
238 struct winbindd_request
*init_req
;
239 struct winbindd_response
*response
;
242 static void wb_domain_request_gotdc(struct tevent_req
*subreq
);
243 static void wb_domain_request_initialized(struct tevent_req
*subreq
);
244 static void wb_domain_request_done(struct tevent_req
*subreq
);
246 struct tevent_req
*wb_domain_request_send(TALLOC_CTX
*mem_ctx
,
247 struct tevent_context
*ev
,
248 struct winbindd_domain
*domain
,
249 struct winbindd_request
*request
)
251 struct tevent_req
*req
, *subreq
;
252 struct wb_domain_request_state
*state
;
254 req
= tevent_req_create(mem_ctx
, &state
,
255 struct wb_domain_request_state
);
260 state
->child
= choose_domain_child(domain
);
262 if (domain
->initialized
) {
263 subreq
= wb_child_request_send(state
, ev
, state
->child
,
265 if (tevent_req_nomem(subreq
, req
)) {
266 return tevent_req_post(req
, ev
);
268 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
272 state
->domain
= domain
;
274 state
->request
= request
;
276 state
->init_req
= talloc_zero(state
, struct winbindd_request
);
277 if (tevent_req_nomem(state
->init_req
, req
)) {
278 return tevent_req_post(req
, ev
);
281 if (IS_DC
|| domain
->primary
|| domain
->internal
) {
282 /* The primary domain has to find the DC name itself */
283 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
284 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
285 state
->init_req
->data
.init_conn
.is_primary
= domain
->primary
;
286 fstrcpy(state
->init_req
->data
.init_conn
.dcname
, "");
288 subreq
= wb_child_request_send(state
, ev
, state
->child
,
290 if (tevent_req_nomem(subreq
, req
)) {
291 return tevent_req_post(req
, ev
);
293 tevent_req_set_callback(subreq
, wb_domain_request_initialized
,
299 * Ask our DC for a DC name
301 domain
= find_our_domain();
303 /* This is *not* the primary domain, let's ask our DC about a DC
306 state
->init_req
->cmd
= WINBINDD_GETDCNAME
;
307 fstrcpy(state
->init_req
->domain_name
, domain
->name
);
309 subreq
= wb_child_request_send(state
, ev
, state
->child
, request
);
310 if (tevent_req_nomem(subreq
, req
)) {
311 return tevent_req_post(req
, ev
);
313 tevent_req_set_callback(subreq
, wb_domain_request_gotdc
, req
);
317 static void wb_domain_request_gotdc(struct tevent_req
*subreq
)
319 struct tevent_req
*req
= tevent_req_callback_data(
320 subreq
, struct tevent_req
);
321 struct wb_domain_request_state
*state
= tevent_req_data(
322 req
, struct wb_domain_request_state
);
323 struct winbindd_response
*response
;
326 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
329 tevent_req_error(req
, err
);
332 state
->init_req
->cmd
= WINBINDD_INIT_CONNECTION
;
333 fstrcpy(state
->init_req
->domain_name
, state
->domain
->name
);
334 state
->init_req
->data
.init_conn
.is_primary
= False
;
335 fstrcpy(state
->init_req
->data
.init_conn
.dcname
,
336 response
->data
.dc_name
);
338 TALLOC_FREE(response
);
340 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
342 if (tevent_req_nomem(subreq
, req
)) {
345 tevent_req_set_callback(subreq
, wb_domain_request_initialized
, req
);
348 static void wb_domain_request_initialized(struct tevent_req
*subreq
)
350 struct tevent_req
*req
= tevent_req_callback_data(
351 subreq
, struct tevent_req
);
352 struct wb_domain_request_state
*state
= tevent_req_data(
353 req
, struct wb_domain_request_state
);
354 struct winbindd_response
*response
;
357 ret
= wb_child_request_recv(subreq
, talloc_tos(), &response
, &err
);
360 tevent_req_error(req
, err
);
364 if (!string_to_sid(&state
->domain
->sid
,
365 response
->data
.domain_info
.sid
)) {
366 DEBUG(1,("init_child_recv: Could not convert sid %s "
367 "from string\n", response
->data
.domain_info
.sid
));
368 tevent_req_error(req
, EINVAL
);
371 fstrcpy(state
->domain
->name
, response
->data
.domain_info
.name
);
372 fstrcpy(state
->domain
->alt_name
, response
->data
.domain_info
.alt_name
);
373 state
->domain
->native_mode
= response
->data
.domain_info
.native_mode
;
374 state
->domain
->active_directory
=
375 response
->data
.domain_info
.active_directory
;
376 state
->domain
->initialized
= true;
378 TALLOC_FREE(response
);
380 subreq
= wb_child_request_send(state
, state
->ev
, state
->child
,
382 if (tevent_req_nomem(subreq
, req
)) {
385 tevent_req_set_callback(subreq
, wb_domain_request_done
, req
);
388 static void wb_domain_request_done(struct tevent_req
*subreq
)
390 struct tevent_req
*req
= tevent_req_callback_data(
391 subreq
, struct tevent_req
);
392 struct wb_domain_request_state
*state
= tevent_req_data(
393 req
, struct wb_domain_request_state
);
396 ret
= wb_child_request_recv(subreq
, talloc_tos(), &state
->response
,
400 tevent_req_error(req
, err
);
403 tevent_req_done(req
);
406 int wb_domain_request_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
407 struct winbindd_response
**presponse
, int *err
)
409 struct wb_domain_request_state
*state
= tevent_req_data(
410 req
, struct wb_domain_request_state
);
412 if (tevent_req_is_unix_error(req
, err
)) {
415 *presponse
= talloc_move(mem_ctx
, &state
->response
);
419 static void child_process_request(struct winbindd_child
*child
,
420 struct winbindd_cli_state
*state
)
422 struct winbindd_domain
*domain
= child
->domain
;
423 const struct winbindd_child_dispatch_table
*table
= child
->table
;
425 /* Free response data - we may be interrupted and receive another
426 command before being able to send this data off. */
428 state
->response
->result
= WINBINDD_ERROR
;
429 state
->response
->length
= sizeof(struct winbindd_response
);
431 /* as all requests in the child are sync, we can use talloc_tos() */
432 state
->mem_ctx
= talloc_tos();
434 /* Process command */
436 for (; table
->name
; table
++) {
437 if (state
->request
->cmd
== table
->struct_cmd
) {
438 DEBUG(10,("child_process_request: request fn %s\n",
440 state
->response
->result
= table
->struct_fn(domain
, state
);
445 DEBUG(1, ("child_process_request: unknown request fn number %d\n",
446 (int)state
->request
->cmd
));
447 state
->response
->result
= WINBINDD_ERROR
;
450 void setup_child(struct winbindd_domain
*domain
, struct winbindd_child
*child
,
451 const struct winbindd_child_dispatch_table
*table
,
452 const char *logprefix
,
455 if (logprefix
&& logname
) {
456 char *logbase
= NULL
;
461 if (asprintf(&logbase
, "%s", lp_logfile()) < 0) {
462 smb_panic("Internal error: asprintf failed");
465 if ((end
= strrchr_m(logbase
, '/'))) {
469 if (asprintf(&logbase
, "%s", get_dyn_LOGFILEBASE()) < 0) {
470 smb_panic("Internal error: asprintf failed");
474 if (asprintf(&child
->logfilename
, "%s/%s-%s",
475 logbase
, logprefix
, logname
) < 0) {
477 smb_panic("Internal error: asprintf failed");
482 smb_panic("Internal error: logprefix == NULL && "
487 child
->domain
= domain
;
488 child
->table
= table
;
489 child
->queue
= tevent_queue_create(NULL
, "winbind_child");
490 SMB_ASSERT(child
->queue
!= NULL
);
491 child
->binding_handle
= wbint_binding_handle(NULL
, domain
, child
);
492 SMB_ASSERT(child
->binding_handle
!= NULL
);
495 static struct winbindd_child
*winbindd_children
= NULL
;
497 void winbind_child_died(pid_t pid
)
499 struct winbindd_child
*child
;
501 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
502 if (child
->pid
== pid
) {
508 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid
));
512 /* This will be re-added in fork_domain_child() */
514 DLIST_REMOVE(winbindd_children
, child
);
518 /* Ensure any negative cache entries with the netbios or realm names are removed. */
520 void winbindd_flush_negative_conn_cache(struct winbindd_domain
*domain
)
522 flush_negative_conn_cache_for_domain(domain
->name
);
523 if (*domain
->alt_name
) {
524 flush_negative_conn_cache_for_domain(domain
->alt_name
);
529 * Parent winbindd process sets its own debug level first and then
530 * sends a message to all the winbindd children to adjust their debug
531 * level to that of parents.
534 void winbind_msg_debug(struct messaging_context
*msg_ctx
,
537 struct server_id server_id
,
540 struct winbindd_child
*child
;
542 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
544 debug_message(msg_ctx
, private_data
, MSG_DEBUG
, server_id
, data
);
546 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
548 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
549 (unsigned int)child
->pid
));
551 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
554 strlen((char *) data
->data
) + 1);
558 /* Set our domains as offline and forward the offline message to our children. */
560 void winbind_msg_offline(struct messaging_context
*msg_ctx
,
563 struct server_id server_id
,
566 struct winbindd_child
*child
;
567 struct winbindd_domain
*domain
;
569 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
571 if (!lp_winbind_offline_logon()) {
572 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
576 /* Set our global state as offline. */
577 if (!set_global_winbindd_state_offline()) {
578 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
582 /* Set all our domains as offline. */
583 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
584 if (domain
->internal
) {
587 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain
->name
));
588 set_domain_offline(domain
);
591 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
592 /* Don't send message to internal children. We've already
594 if (!child
->domain
|| winbindd_internal_child(child
)) {
598 /* Or internal domains (this should not be possible....) */
599 if (child
->domain
->internal
) {
603 /* Each winbindd child should only process requests for one domain - make sure
604 we only set it online / offline for that domain. */
606 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
607 (unsigned int)child
->pid
, domain
->name
));
609 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
611 (uint8
*)child
->domain
->name
,
612 strlen(child
->domain
->name
)+1);
616 /* Set our domains as online and forward the online message to our children. */
618 void winbind_msg_online(struct messaging_context
*msg_ctx
,
621 struct server_id server_id
,
624 struct winbindd_child
*child
;
625 struct winbindd_domain
*domain
;
627 DEBUG(10,("winbind_msg_online: got online message.\n"));
629 if (!lp_winbind_offline_logon()) {
630 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
634 /* Set our global state as online. */
635 set_global_winbindd_state_online();
637 smb_nscd_flush_user_cache();
638 smb_nscd_flush_group_cache();
640 /* Set all our domains as online. */
641 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
642 if (domain
->internal
) {
645 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain
->name
));
647 winbindd_flush_negative_conn_cache(domain
);
648 set_domain_online_request(domain
);
650 /* Send an online message to the idmap child when our
651 primary domain comes back online */
653 if ( domain
->primary
) {
654 struct winbindd_child
*idmap
= idmap_child();
656 if ( idmap
->pid
!= 0 ) {
657 messaging_send_buf(msg_ctx
,
658 pid_to_procid(idmap
->pid
),
660 (uint8
*)domain
->name
,
661 strlen(domain
->name
)+1);
666 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
667 /* Don't send message to internal childs. */
668 if (!child
->domain
|| winbindd_internal_child(child
)) {
672 /* Or internal domains (this should not be possible....) */
673 if (child
->domain
->internal
) {
677 /* Each winbindd child should only process requests for one domain - make sure
678 we only set it online / offline for that domain. */
680 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
681 (unsigned int)child
->pid
, child
->domain
->name
));
683 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
685 (uint8
*)child
->domain
->name
,
686 strlen(child
->domain
->name
)+1);
690 static const char *collect_onlinestatus(TALLOC_CTX
*mem_ctx
)
692 struct winbindd_domain
*domain
;
695 if ((buf
= talloc_asprintf(mem_ctx
, "global:%s ",
696 get_global_winbindd_state_offline() ?
697 "Offline":"Online")) == NULL
) {
701 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
702 if ((buf
= talloc_asprintf_append_buffer(buf
, "%s:%s ",
705 "Online":"Offline")) == NULL
) {
710 buf
= talloc_asprintf_append_buffer(buf
, "\n");
712 DEBUG(5,("collect_onlinestatus: %s", buf
));
717 void winbind_msg_onlinestatus(struct messaging_context
*msg_ctx
,
720 struct server_id server_id
,
725 struct server_id
*sender
;
727 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
733 sender
= (struct server_id
*)data
->data
;
735 mem_ctx
= talloc_init("winbind_msg_onlinestatus");
736 if (mem_ctx
== NULL
) {
740 message
= collect_onlinestatus(mem_ctx
);
741 if (message
== NULL
) {
742 talloc_destroy(mem_ctx
);
746 messaging_send_buf(msg_ctx
, *sender
, MSG_WINBIND_ONLINESTATUS
,
747 (uint8
*)message
, strlen(message
) + 1);
749 talloc_destroy(mem_ctx
);
752 void winbind_msg_dump_event_list(struct messaging_context
*msg_ctx
,
755 struct server_id server_id
,
758 struct winbindd_child
*child
;
760 DEBUG(10,("winbind_msg_dump_event_list received\n"));
762 dump_event_list(winbind_event_context());
764 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
766 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
767 (unsigned int)child
->pid
));
769 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
776 void winbind_msg_dump_domain_list(struct messaging_context
*msg_ctx
,
779 struct server_id server_id
,
783 const char *message
= NULL
;
784 struct server_id
*sender
= NULL
;
785 const char *domain
= NULL
;
788 struct winbindd_domain
*dom
= NULL
;
790 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
792 if (!data
|| !data
->data
) {
796 if (data
->length
< sizeof(struct server_id
)) {
800 mem_ctx
= talloc_init("winbind_msg_dump_domain_list");
805 sender
= (struct server_id
*)data
->data
;
806 if (data
->length
> sizeof(struct server_id
)) {
807 domain
= (const char *)data
->data
+sizeof(struct server_id
);
812 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
815 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
,
816 find_domain_from_name_noinit(domain
));
818 talloc_destroy(mem_ctx
);
822 messaging_send_buf(msg_ctx
, *sender
,
823 MSG_WINBIND_DUMP_DOMAIN_LIST
,
824 (uint8_t *)message
, strlen(message
) + 1);
826 talloc_destroy(mem_ctx
);
831 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
833 for (dom
= domain_list(); dom
; dom
=dom
->next
) {
834 message
= NDR_PRINT_STRUCT_STRING(mem_ctx
, winbindd_domain
, dom
);
836 talloc_destroy(mem_ctx
);
840 s
= talloc_asprintf_append(s
, "%s\n", message
);
842 talloc_destroy(mem_ctx
);
847 status
= messaging_send_buf(msg_ctx
, *sender
,
848 MSG_WINBIND_DUMP_DOMAIN_LIST
,
849 (uint8_t *)s
, strlen(s
) + 1);
850 if (!NT_STATUS_IS_OK(status
)) {
851 DEBUG(0,("failed to send message: %s\n",
855 talloc_destroy(mem_ctx
);
858 static void account_lockout_policy_handler(struct event_context
*ctx
,
859 struct timed_event
*te
,
863 struct winbindd_child
*child
=
864 (struct winbindd_child
*)private_data
;
865 TALLOC_CTX
*mem_ctx
= NULL
;
866 struct winbindd_methods
*methods
;
867 struct samr_DomInfo12 lockout_policy
;
870 DEBUG(10,("account_lockout_policy_handler called\n"));
872 TALLOC_FREE(child
->lockout_policy_event
);
874 if ( !winbindd_can_contact_domain( child
->domain
) ) {
875 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
876 "do not have an incoming trust to domain %s\n",
877 child
->domain
->name
));
882 methods
= child
->domain
->methods
;
884 mem_ctx
= talloc_init("account_lockout_policy_handler ctx");
886 result
= NT_STATUS_NO_MEMORY
;
888 result
= methods
->lockout_policy(child
->domain
, mem_ctx
, &lockout_policy
);
890 TALLOC_FREE(mem_ctx
);
892 if (!NT_STATUS_IS_OK(result
)) {
893 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
897 child
->lockout_policy_event
= event_add_timed(winbind_event_context(), NULL
,
898 timeval_current_ofs(3600, 0),
899 account_lockout_policy_handler
,
903 static time_t get_machine_password_timeout(void)
905 /* until we have gpo support use lp setting */
906 return lp_machine_password_timeout();
909 static bool calculate_next_machine_pwd_change(const char *domain
,
912 time_t pass_last_set_time
;
918 pw
= secrets_fetch_machine_password(domain
,
923 DEBUG(0,("cannot fetch own machine password ????"));
929 timeout
= get_machine_password_timeout();
931 DEBUG(10,("machine password never expires\n"));
935 tv
.tv_sec
= pass_last_set_time
;
936 DEBUG(10, ("password last changed %s\n",
937 timeval_string(talloc_tos(), &tv
, false)));
938 tv
.tv_sec
+= timeout
;
939 DEBUGADD(10, ("password valid until %s\n",
940 timeval_string(talloc_tos(), &tv
, false)));
942 if (time(NULL
) < (pass_last_set_time
+ timeout
)) {
943 next_change
= pass_last_set_time
+ timeout
;
944 DEBUG(10,("machine password still valid until: %s\n",
945 http_timestring(talloc_tos(), next_change
)));
946 *t
= timeval_set(next_change
, 0);
948 if (lp_clustering()) {
951 * When having a cluster, we have several
952 * winbinds racing for the password change. In
953 * the machine_password_change_handler()
954 * function we check if someone else was
955 * faster when the event triggers. We add a
956 * 255-second random delay here, so that we
957 * don't run to change the password at the
960 generate_random_buffer(&randbuf
, sizeof(randbuf
));
961 DEBUG(10, ("adding %d seconds randomness\n",
963 t
->tv_sec
+= randbuf
;
968 DEBUG(10,("machine password expired, needs immediate change\n"));
975 static void machine_password_change_handler(struct event_context
*ctx
,
976 struct timed_event
*te
,
980 struct winbindd_child
*child
=
981 (struct winbindd_child
*)private_data
;
982 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
985 struct timeval next_change
;
987 DEBUG(10,("machine_password_change_handler called\n"));
989 TALLOC_FREE(child
->machine_password_change_event
);
991 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
993 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
997 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
998 timeval_string(talloc_tos(), &next_change
, false)));
1000 if (!timeval_expired(&next_change
)) {
1001 DEBUG(10, ("Someone else has already changed the pw\n"));
1005 if (!winbindd_can_contact_domain(child
->domain
)) {
1006 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1007 "do not have an incoming trust to domain %s\n",
1008 child
->domain
->name
));
1012 result
= cm_connect_netlogon(child
->domain
, &netlogon_pipe
);
1013 if (!NT_STATUS_IS_OK(result
)) {
1014 DEBUG(10,("machine_password_change_handler: "
1015 "failed to connect netlogon pipe: %s\n",
1016 nt_errstr(result
)));
1020 frame
= talloc_stackframe();
1022 result
= trust_pw_find_change_and_store_it(netlogon_pipe
,
1024 child
->domain
->name
);
1027 DEBUG(10, ("machine_password_change_handler: "
1028 "trust_pw_find_change_and_store_it returned %s\n",
1029 nt_errstr(result
)));
1031 if (NT_STATUS_EQUAL(result
, NT_STATUS_ACCESS_DENIED
) ) {
1032 DEBUG(3,("machine_password_change_handler: password set returned "
1033 "ACCESS_DENIED. Maybe the trust account "
1034 "password was changed and we didn't know it. "
1035 "Killing connections to domain %s\n",
1036 child
->domain
->name
));
1037 TALLOC_FREE(child
->domain
->conn
.netlogon_pipe
);
1040 if (!calculate_next_machine_pwd_change(child
->domain
->name
,
1042 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1046 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1047 timeval_string(talloc_tos(), &next_change
, false)));
1049 if (!NT_STATUS_IS_OK(result
)) {
1052 * In case of failure, give the DC a minute to recover
1054 tmp
= timeval_current_ofs(60, 0);
1055 next_change
= timeval_max(&next_change
, &tmp
);
1059 child
->machine_password_change_event
= event_add_timed(winbind_event_context(), NULL
,
1061 machine_password_change_handler
,
1065 /* Deal with a request to go offline. */
1067 static void child_msg_offline(struct messaging_context
*msg
,
1070 struct server_id server_id
,
1073 struct winbindd_domain
*domain
;
1074 struct winbindd_domain
*primary_domain
= NULL
;
1075 const char *domainname
= (const char *)data
->data
;
1077 if (data
->data
== NULL
|| data
->length
== 0) {
1081 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname
));
1083 if (!lp_winbind_offline_logon()) {
1084 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1088 primary_domain
= find_our_domain();
1090 /* Mark the requested domain offline. */
1092 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1093 if (domain
->internal
) {
1096 if (strequal(domain
->name
, domainname
)) {
1097 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain
->name
));
1098 set_domain_offline(domain
);
1099 /* we are in the trusted domain, set the primary domain
1101 if (domain
!= primary_domain
) {
1102 set_domain_offline(primary_domain
);
1108 /* Deal with a request to go online. */
1110 static void child_msg_online(struct messaging_context
*msg
,
1113 struct server_id server_id
,
1116 struct winbindd_domain
*domain
;
1117 struct winbindd_domain
*primary_domain
= NULL
;
1118 const char *domainname
= (const char *)data
->data
;
1120 if (data
->data
== NULL
|| data
->length
== 0) {
1124 DEBUG(5,("child_msg_online received for domain %s.\n", domainname
));
1126 if (!lp_winbind_offline_logon()) {
1127 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1131 primary_domain
= find_our_domain();
1133 /* Set our global state as online. */
1134 set_global_winbindd_state_online();
1136 /* Try and mark everything online - delete any negative cache entries
1137 to force a reconnect now. */
1139 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1140 if (domain
->internal
) {
1143 if (strequal(domain
->name
, domainname
)) {
1144 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain
->name
));
1145 winbindd_flush_negative_conn_cache(domain
);
1146 set_domain_online_request(domain
);
1148 /* we can be in trusted domain, which will contact primary domain
1149 * we have to bring primary domain online in trusted domain process
1150 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1151 * --> contact_domain = find_our_domain()
1153 if (domain
!= primary_domain
) {
1154 winbindd_flush_negative_conn_cache(primary_domain
);
1155 set_domain_online_request(primary_domain
);
1161 static void child_msg_dump_event_list(struct messaging_context
*msg
,
1164 struct server_id server_id
,
1167 DEBUG(5,("child_msg_dump_event_list received\n"));
1169 dump_event_list(winbind_event_context());
1172 bool winbindd_reinit_after_fork(const char *logfilename
)
1174 struct winbindd_domain
*domain
;
1175 struct winbindd_child
*cl
;
1178 status
= reinit_after_fork(
1179 winbind_messaging_context(),
1180 winbind_event_context(),
1183 if (!NT_STATUS_IS_OK(status
)) {
1184 DEBUG(0,("reinit_after_fork() failed\n"));
1188 close_conns_after_fork();
1190 if (!override_logfile
&& logfilename
) {
1191 lp_set_logfile(logfilename
);
1195 if (!winbindd_setup_sig_term_handler(false))
1197 if (!winbindd_setup_sig_hup_handler(override_logfile
? NULL
:
1201 /* Stop zombies in children */
1204 /* Don't handle the same messages as our parent. */
1205 messaging_deregister(winbind_messaging_context(),
1206 MSG_SMB_CONF_UPDATED
, NULL
);
1207 messaging_deregister(winbind_messaging_context(),
1208 MSG_SHUTDOWN
, NULL
);
1209 messaging_deregister(winbind_messaging_context(),
1210 MSG_WINBIND_OFFLINE
, NULL
);
1211 messaging_deregister(winbind_messaging_context(),
1212 MSG_WINBIND_ONLINE
, NULL
);
1213 messaging_deregister(winbind_messaging_context(),
1214 MSG_WINBIND_ONLINESTATUS
, NULL
);
1215 messaging_deregister(winbind_messaging_context(),
1216 MSG_DUMP_EVENT_LIST
, NULL
);
1217 messaging_deregister(winbind_messaging_context(),
1218 MSG_WINBIND_DUMP_DOMAIN_LIST
, NULL
);
1219 messaging_deregister(winbind_messaging_context(),
1222 /* We have destroyed all events in the winbindd_event_context
1223 * in reinit_after_fork(), so clean out all possible pending
1224 * event pointers. */
1226 /* Deal with check_online_events. */
1228 for (domain
= domain_list(); domain
; domain
= domain
->next
) {
1229 TALLOC_FREE(domain
->check_online_event
);
1232 /* Ensure we're not handling a credential cache event inherited
1233 * from our parent. */
1235 ccache_remove_all_after_fork();
1237 /* Destroy all possible events in child list. */
1238 for (cl
= winbindd_children
; cl
!= NULL
; cl
= cl
->next
) {
1239 TALLOC_FREE(cl
->lockout_policy_event
);
1240 TALLOC_FREE(cl
->machine_password_change_event
);
1242 /* Children should never be able to send
1243 * each other messages, all messages must
1244 * go through the parent.
1249 * This is a little tricky, children must not
1250 * send an MSG_WINBIND_ONLINE message to idmap_child().
1251 * If we are in a child of our primary domain or
1252 * in the process created by fork_child_dc_connect(),
1253 * and the primary domain cannot go online,
1254 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1255 * periodically to idmap_child().
1257 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1258 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1259 * ---> init_dc_connection() ---> cm_open_connection --->
1260 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1261 * idmap_child(). Disallow children sending messages
1262 * to each other, all messages must go through the parent.
1271 * In a child there will be only one domain, reference that here.
1273 static struct winbindd_domain
*child_domain
;
1275 struct winbindd_domain
*wb_child_domain(void)
1277 return child_domain
;
1280 static bool fork_domain_child(struct winbindd_child
*child
)
1283 struct winbindd_cli_state state
;
1284 struct winbindd_request request
;
1285 struct winbindd_response response
;
1286 struct winbindd_domain
*primary_domain
= NULL
;
1288 if (child
->domain
) {
1289 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1290 child
->domain
->name
));
1292 DEBUG(10, ("fork_domain_child called without domain.\n"));
1295 if (socketpair(AF_UNIX
, SOCK_STREAM
, 0, fdpair
) != 0) {
1296 DEBUG(0, ("Could not open child pipe: %s\n",
1302 state
.pid
= sys_getpid();
1303 state
.request
= &request
;
1304 state
.response
= &response
;
1306 child
->pid
= sys_fork();
1308 if (child
->pid
== -1) {
1309 DEBUG(0, ("Could not fork: %s\n", strerror(errno
)));
1313 if (child
->pid
!= 0) {
1316 child
->next
= child
->prev
= NULL
;
1317 DLIST_ADD(winbindd_children
, child
);
1318 child
->sock
= fdpair
[1];
1323 child_domain
= child
->domain
;
1325 DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
1327 state
.sock
= fdpair
[0];
1330 if (!winbindd_reinit_after_fork(child
->logfilename
)) {
1334 /* Handle online/offline messages. */
1335 messaging_register(winbind_messaging_context(), NULL
,
1336 MSG_WINBIND_OFFLINE
, child_msg_offline
);
1337 messaging_register(winbind_messaging_context(), NULL
,
1338 MSG_WINBIND_ONLINE
, child_msg_online
);
1339 messaging_register(winbind_messaging_context(), NULL
,
1340 MSG_DUMP_EVENT_LIST
, child_msg_dump_event_list
);
1341 messaging_register(winbind_messaging_context(), NULL
,
1342 MSG_DEBUG
, debug_message
);
1343 messaging_register(winbind_messaging_context(), NULL
,
1344 MSG_WINBIND_IP_DROPPED
,
1345 winbind_msg_ip_dropped
);
1348 primary_domain
= find_our_domain();
1350 if (primary_domain
== NULL
) {
1351 smb_panic("no primary domain found");
1354 /* It doesn't matter if we allow cache login,
1355 * try to bring domain online after fork. */
1356 if ( child
->domain
) {
1357 child
->domain
->startup
= True
;
1358 child
->domain
->startup_time
= time_mono(NULL
);
1359 /* we can be in primary domain or in trusted domain
1360 * If we are in trusted domain, set the primary domain
1361 * in start-up mode */
1362 if (!(child
->domain
->internal
)) {
1363 set_domain_online_request(child
->domain
);
1364 if (!(child
->domain
->primary
)) {
1365 primary_domain
->startup
= True
;
1366 primary_domain
->startup_time
= time_mono(NULL
);
1367 set_domain_online_request(primary_domain
);
1373 * We are in idmap child, make sure that we set the
1374 * check_online_event to bring primary domain online.
1376 if (child
== idmap_child()) {
1377 set_domain_online_request(primary_domain
);
1380 /* We might be in the idmap child...*/
1381 if (child
->domain
&& !(child
->domain
->internal
) &&
1382 lp_winbind_offline_logon()) {
1384 set_domain_online_request(child
->domain
);
1386 if (primary_domain
&& (primary_domain
!= child
->domain
)) {
1387 /* We need to talk to the primary
1388 * domain as well as the trusted
1389 * domain inside a trusted domain
1392 * set_dc_type_and_flags_trustinfo()
1395 set_domain_online_request(primary_domain
);
1398 child
->lockout_policy_event
= event_add_timed(
1399 winbind_event_context(), NULL
, timeval_zero(),
1400 account_lockout_policy_handler
,
1404 if (child
->domain
&& child
->domain
->primary
&&
1405 !USE_KERBEROS_KEYTAB
&&
1406 lp_server_role() == ROLE_DOMAIN_MEMBER
) {
1408 struct timeval next_change
;
1410 if (calculate_next_machine_pwd_change(child
->domain
->name
,
1412 child
->machine_password_change_event
= event_add_timed(
1413 winbind_event_context(), NULL
, next_change
,
1414 machine_password_change_handler
,
1427 TALLOC_CTX
*frame
= talloc_stackframe();
1428 struct iovec iov
[2];
1432 if (run_events(winbind_event_context(), 0, NULL
, NULL
)) {
1437 if (child
->domain
&& child
->domain
->startup
&&
1438 (time_mono(NULL
) > child
->domain
->startup_time
+ 30)) {
1439 /* No longer in "startup" mode. */
1440 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1441 child
->domain
->name
));
1442 child
->domain
->startup
= False
;
1447 FD_SET(state
.sock
, &r_fds
);
1451 * Initialize this high as event_add_to_select_args()
1452 * uses a timeval_min() on this and next_event. Fix
1453 * from Roel van Meer <rolek@alt001.com>.
1458 event_add_to_select_args(winbind_event_context(),
1459 &r_fds
, &w_fds
, &t
, &maxfd
);
1460 tp
= get_timed_events_timeout(winbind_event_context(), &t
);
1462 DEBUG(11,("select will use timeout of %u.%u seconds\n",
1463 (unsigned int)tp
->tv_sec
, (unsigned int)tp
->tv_usec
));
1466 ret
= sys_select(maxfd
+ 1, &r_fds
, &w_fds
, NULL
, tp
);
1468 if (run_events(winbind_event_context(), ret
, &r_fds
, &w_fds
)) {
1469 /* We got a signal - continue. */
1475 DEBUG(11,("nothing is ready yet, continue\n"));
1480 if (ret
== -1 && errno
== EINTR
) {
1481 /* We got a signal - continue. */
1486 if (ret
== -1 && errno
!= EINTR
) {
1487 DEBUG(0,("select error occured\n"));
1493 /* fetch a request from the main daemon */
1494 status
= child_read_request(&state
);
1496 if (!NT_STATUS_IS_OK(status
)) {
1497 /* we lost contact with our parent */
1501 DEBUG(4,("child daemon request %d\n", (int)state
.request
->cmd
));
1503 ZERO_STRUCTP(state
.response
);
1504 state
.request
->null_term
= '\0';
1505 state
.mem_ctx
= frame
;
1506 child_process_request(child
, &state
);
1508 DEBUG(4, ("Finished processing child request %d\n",
1509 (int)state
.request
->cmd
));
1511 SAFE_FREE(state
.request
->extra_data
.data
);
1513 iov
[0].iov_base
= (void *)state
.response
;
1514 iov
[0].iov_len
= sizeof(struct winbindd_response
);
1517 if (state
.response
->length
> sizeof(struct winbindd_response
)) {
1519 (void *)state
.response
->extra_data
.data
;
1520 iov
[1].iov_len
= state
.response
->length
-iov
[0].iov_len
;
1524 DEBUG(10, ("Writing %d bytes to parent\n",
1525 (int)state
.response
->length
));
1527 if (write_data_iov(state
.sock
, iov
, iov_count
) !=
1528 state
.response
->length
) {
1529 DEBUG(0, ("Could not write result\n"));
1536 void winbind_msg_ip_dropped_parent(struct messaging_context
*msg_ctx
,
1539 struct server_id server_id
,
1542 struct winbindd_child
*child
;
1544 winbind_msg_ip_dropped(msg_ctx
, private_data
, msg_type
,
1548 for (child
= winbindd_children
; child
!= NULL
; child
= child
->next
) {
1549 messaging_send_buf(msg_ctx
, pid_to_procid(child
->pid
),
1550 msg_type
, data
->data
, data
->length
);