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s3:winbind: Fork multiple children per domain
[Samba/gebeck_regimport.git] / source3 / winbindd / winbindd_dual.c
bloba32459d595044c4babc44963e1c4ae77126dc3df
1 /*
2 Unix SMB/CIFS implementation.
3
4 Winbind child daemons
5
6 Copyright (C) Andrew Tridgell 2002
7 Copyright (C) Volker Lendecke 2004,2005
8
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.
13
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.
18
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/>.
21 */
22
23 /*
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.
28 */
29
30 #include "includes.h"
31 #include "winbindd.h"
32 #include "lib/wb_reqtrans.h"
33 #include "librpc/gen_ndr/messaging.h"
34 #include "secrets.h"
35 #include "../lib/util/select.h"
36 #include "../libcli/security/security.h"
37
38 #undef DBGC_CLASS
39 #define DBGC_CLASS DBGC_WINBIND
40
41 extern bool override_logfile;
42 extern struct winbindd_methods cache_methods;
43
44 /* Read some data from a client connection */
45
46 static NTSTATUS child_read_request(struct winbindd_cli_state *state)
47 {
48 NTSTATUS status;
49
50 /* Read data */
51
52 status = read_data(state->sock, (char *)state->request,
53 sizeof(*state->request));
54
55 if (!NT_STATUS_IS_OK(status)) {
56 DEBUG(3, ("child_read_request: read_data failed: %s\n",
57 nt_errstr(status)));
58 return status;
59 }
60
61 if (state->request->extra_len == 0) {
62 state->request->extra_data.data = NULL;
63 return NT_STATUS_OK;
64 }
65
66 DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request->extra_len));
67
68 state->request->extra_data.data =
69 SMB_MALLOC_ARRAY(char, state->request->extra_len + 1);
70
71 if (state->request->extra_data.data == NULL) {
72 DEBUG(0, ("malloc failed\n"));
73 return NT_STATUS_NO_MEMORY;
74 }
75
76 /* Ensure null termination */
77 state->request->extra_data.data[state->request->extra_len] = '\0';
78
79 status= read_data(state->sock, state->request->extra_data.data,
80 state->request->extra_len);
81
82 if (!NT_STATUS_IS_OK(status)) {
83 DEBUG(0, ("Could not read extra data: %s\n",
84 nt_errstr(status)));
85 }
86 return status;
87 }
88
89 /*
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.
93 */
94
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;
100 };
101
102 static bool fork_domain_child(struct winbindd_child *child);
103
104 static void wb_child_request_trigger(struct tevent_req *req,
105 void *private_data);
106 static void wb_child_request_done(struct tevent_req *subreq);
107
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)
112 {
113 struct tevent_req *req;
114 struct wb_child_request_state *state;
115
116 req = tevent_req_create(mem_ctx, &state,
117 struct wb_child_request_state);
118 if (req == NULL) {
119 return NULL;
120 }
121
122 state->ev = ev;
123 state->child = child;
124 state->request = request;
125
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);
130 }
131 return req;
132 }
133
134 static void wb_child_request_trigger(struct tevent_req *req,
135 void *private_data)
136 {
137 struct wb_child_request_state *state = tevent_req_data(
138 req, struct wb_child_request_state);
139 struct tevent_req *subreq;
140
141 if ((state->child->sock == -1) && (!fork_domain_child(state->child))) {
142 tevent_req_error(req, errno);
143 return;
144 }
145
146 subreq = wb_simple_trans_send(state, winbind_event_context(), NULL,
147 state->child->sock, state->request);
148 if (tevent_req_nomem(subreq, req)) {
149 return;
150 }
151 tevent_req_set_callback(subreq, wb_child_request_done, req);
152
153 if (!tevent_req_set_endtime(req, state->ev,
154 timeval_current_ofs(300, 0))) {
155 tevent_req_nomem(NULL, req);
156 return;
157 }
158 }
159
160 static void wb_child_request_done(struct tevent_req *subreq)
161 {
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);
166 int ret, err;
167
168 ret = wb_simple_trans_recv(subreq, state, &state->response, &err);
169 TALLOC_FREE(subreq);
170 if (ret == -1) {
171 /*
172 * The basic parent/child communication broke, close
173 * our socket
174 */
175 close(state->child->sock);
176 state->child->sock = -1;
177 tevent_req_error(req, err);
178 return;
179 }
180 tevent_req_done(req);
181 }
182
183 int wb_child_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
184 struct winbindd_response **presponse, int *err)
185 {
186 struct wb_child_request_state *state = tevent_req_data(
187 req, struct wb_child_request_state);
188
189 if (tevent_req_is_unix_error(req, err)) {
190 return -1;
191 }
192 *presponse = talloc_move(mem_ctx, &state->response);
193 return 0;
194 }
195
196 static bool winbindd_child_busy(struct winbindd_child *child)
197 {
198 return tevent_queue_length(child->queue) > 0;
199 }
200
201 static struct winbindd_child *find_idle_child(struct winbindd_domain *domain)
202 {
203 int i;
204
205 for (i=0; i<lp_winbind_max_domain_connections(); i++) {
206 if (!winbindd_child_busy(&domain->children[i])) {
207 return &domain->children[i];
208 }
209 }
210
211 return NULL;
212 }
213
214 struct winbindd_child *choose_domain_child(struct winbindd_domain *domain)
215 {
216 struct winbindd_child *result;
217
218 result = find_idle_child(domain);
219 if (result != NULL) {
220 return result;
221 }
222 return &domain->children[rand() % lp_winbind_max_domain_connections()];
223 }
224
225 struct dcerpc_binding_handle *dom_child_handle(struct winbindd_domain *domain)
226 {
227 struct winbindd_child *child;
228
229 child = choose_domain_child(domain);
230 return child->binding_handle;
231 }
232
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;
240 };
241
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);
245
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)
250 {
251 struct tevent_req *req, *subreq;
252 struct wb_domain_request_state *state;
253
254 req = tevent_req_create(mem_ctx, &state,
255 struct wb_domain_request_state);
256 if (req == NULL) {
257 return NULL;
258 }
259
260 state->child = choose_domain_child(domain);
261
262 if (domain->initialized) {
263 subreq = wb_child_request_send(state, ev, state->child,
264 request);
265 if (tevent_req_nomem(subreq, req)) {
266 return tevent_req_post(req, ev);
267 }
268 tevent_req_set_callback(subreq, wb_domain_request_done, req);
269 return req;
270 }
271
272 state->domain = domain;
273 state->ev = ev;
274 state->request = request;
275
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);
279 }
280
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, "");
287
288 subreq = wb_child_request_send(state, ev, state->child,
289 state->init_req);
290 if (tevent_req_nomem(subreq, req)) {
291 return tevent_req_post(req, ev);
292 }
293 tevent_req_set_callback(subreq, wb_domain_request_initialized,
294 req);
295 return req;
296 }
297
298 /*
299 * Ask our DC for a DC name
300 */
301 domain = find_our_domain();
302
303 /* This is *not* the primary domain, let's ask our DC about a DC
304 * name */
305
306 state->init_req->cmd = WINBINDD_GETDCNAME;
307 fstrcpy(state->init_req->domain_name, domain->name);
308
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);
312 }
313 tevent_req_set_callback(subreq, wb_domain_request_gotdc, req);
314 return req;
315 }
316
317 static void wb_domain_request_gotdc(struct tevent_req *subreq)
318 {
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;
324 int ret, err;
325
326 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
327 TALLOC_FREE(subreq);
328 if (ret == -1) {
329 tevent_req_error(req, err);
330 return;
331 }
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);
337
338 TALLOC_FREE(response);
339
340 subreq = wb_child_request_send(state, state->ev, state->child,
341 state->init_req);
342 if (tevent_req_nomem(subreq, req)) {
343 return;
344 }
345 tevent_req_set_callback(subreq, wb_domain_request_initialized, req);
346 }
347
348 static void wb_domain_request_initialized(struct tevent_req *subreq)
349 {
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;
355 int ret, err;
356
357 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
358 TALLOC_FREE(subreq);
359 if (ret == -1) {
360 tevent_req_error(req, err);
361 return;
362 }
363
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);
369 return;
370 }
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;
377
378 TALLOC_FREE(response);
379
380 subreq = wb_child_request_send(state, state->ev, state->child,
381 state->request);
382 if (tevent_req_nomem(subreq, req)) {
383 return;
384 }
385 tevent_req_set_callback(subreq, wb_domain_request_done, req);
386 }
387
388 static void wb_domain_request_done(struct tevent_req *subreq)
389 {
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);
394 int ret, err;
395
396 ret = wb_child_request_recv(subreq, talloc_tos(), &state->response,
397 &err);
398 TALLOC_FREE(subreq);
399 if (ret == -1) {
400 tevent_req_error(req, err);
401 return;
402 }
403 tevent_req_done(req);
404 }
405
406 int wb_domain_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
407 struct winbindd_response **presponse, int *err)
408 {
409 struct wb_domain_request_state *state = tevent_req_data(
410 req, struct wb_domain_request_state);
411
412 if (tevent_req_is_unix_error(req, err)) {
413 return -1;
414 }
415 *presponse = talloc_move(mem_ctx, &state->response);
416 return 0;
417 }
418
419 static void child_process_request(struct winbindd_child *child,
420 struct winbindd_cli_state *state)
421 {
422 struct winbindd_domain *domain = child->domain;
423 const struct winbindd_child_dispatch_table *table = child->table;
424
425 /* Free response data - we may be interrupted and receive another
426 command before being able to send this data off. */
427
428 state->response->result = WINBINDD_ERROR;
429 state->response->length = sizeof(struct winbindd_response);
430
431 /* as all requests in the child are sync, we can use talloc_tos() */
432 state->mem_ctx = talloc_tos();
433
434 /* Process command */
435
436 for (; table->name; table++) {
437 if (state->request->cmd == table->struct_cmd) {
438 DEBUG(10,("child_process_request: request fn %s\n",
439 table->name));
440 state->response->result = table->struct_fn(domain, state);
441 return;
442 }
443 }
444
445 DEBUG(1 ,("child_process_request: unknown request fn number %d\n",
446 (int)state->request->cmd));
447 state->response->result = WINBINDD_ERROR;
448 }
449
450 void setup_child(struct winbindd_domain *domain, struct winbindd_child *child,
451 const struct winbindd_child_dispatch_table *table,
452 const char *logprefix,
453 const char *logname)
454 {
455 if (logprefix && logname) {
456 char *logbase = NULL;
457
458 if (*lp_logfile()) {
459 char *end = NULL;
460
461 if (asprintf(&logbase, "%s", lp_logfile()) < 0) {
462 smb_panic("Internal error: asprintf failed");
463 }
464
465 if ((end = strrchr_m(logbase, '/'))) {
466 *end = '\0';
467 }
468 } else {
469 if (asprintf(&logbase, "%s", get_dyn_LOGFILEBASE()) < 0) {
470 smb_panic("Internal error: asprintf failed");
471 }
472 }
473
474 if (asprintf(&child->logfilename, "%s/%s-%s",
475 logbase, logprefix, logname) < 0) {
476 SAFE_FREE(logbase);
477 smb_panic("Internal error: asprintf failed");
478 }
479
480 SAFE_FREE(logbase);
481 } else {
482 smb_panic("Internal error: logprefix == NULL && "
483 "logname == NULL");
484 }
485
486 child->sock = -1;
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);
493 }
494
495 static struct winbindd_child *winbindd_children = NULL;
496
497 void winbind_child_died(pid_t pid)
498 {
499 struct winbindd_child *child;
500
501 for (child = winbindd_children; child != NULL; child = child->next) {
502 if (child->pid == pid) {
503 break;
504 }
505 }
506
507 if (child == NULL) {
508 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
509 return;
510 }
511
512 /* This will be re-added in fork_domain_child() */
513
514 DLIST_REMOVE(winbindd_children, child);
515 child->pid = 0;
516 }
517
518 /* Ensure any negative cache entries with the netbios or realm names are removed. */
519
520 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
521 {
522 flush_negative_conn_cache_for_domain(domain->name);
523 if (*domain->alt_name) {
524 flush_negative_conn_cache_for_domain(domain->alt_name);
525 }
526 }
527
528 /*
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.
532 */
533
534 void winbind_msg_debug(struct messaging_context *msg_ctx,
535 void *private_data,
536 uint32_t msg_type,
537 struct server_id server_id,
538 DATA_BLOB *data)
539 {
540 struct winbindd_child *child;
541
542 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
543
544 debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
545
546 for (child = winbindd_children; child != NULL; child = child->next) {
547
548 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
549 (unsigned int)child->pid));
550
551 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
552 MSG_DEBUG,
553 data->data,
554 strlen((char *) data->data) + 1);
555 }
556 }
557
558 /* Set our domains as offline and forward the offline message to our children. */
559
560 void winbind_msg_offline(struct messaging_context *msg_ctx,
561 void *private_data,
562 uint32_t msg_type,
563 struct server_id server_id,
564 DATA_BLOB *data)
565 {
566 struct winbindd_child *child;
567 struct winbindd_domain *domain;
568
569 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
570
571 if (!lp_winbind_offline_logon()) {
572 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
573 return;
574 }
575
576 /* Set our global state as offline. */
577 if (!set_global_winbindd_state_offline()) {
578 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
579 return;
580 }
581
582 /* Set all our domains as offline. */
583 for (domain = domain_list(); domain; domain = domain->next) {
584 if (domain->internal) {
585 continue;
586 }
587 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
588 set_domain_offline(domain);
589 }
590
591 for (child = winbindd_children; child != NULL; child = child->next) {
592 /* Don't send message to internal children. We've already
593 done so above. */
594 if (!child->domain || winbindd_internal_child(child)) {
595 continue;
596 }
597
598 /* Or internal domains (this should not be possible....) */
599 if (child->domain->internal) {
600 continue;
601 }
602
603 /* Each winbindd child should only process requests for one domain - make sure
604 we only set it online / offline for that domain. */
605
606 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
607 (unsigned int)child->pid, domain->name ));
608
609 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
610 MSG_WINBIND_OFFLINE,
611 (uint8 *)child->domain->name,
612 strlen(child->domain->name)+1);
613 }
614 }
615
616 /* Set our domains as online and forward the online message to our children. */
617
618 void winbind_msg_online(struct messaging_context *msg_ctx,
619 void *private_data,
620 uint32_t msg_type,
621 struct server_id server_id,
622 DATA_BLOB *data)
623 {
624 struct winbindd_child *child;
625 struct winbindd_domain *domain;
626
627 DEBUG(10,("winbind_msg_online: got online message.\n"));
628
629 if (!lp_winbind_offline_logon()) {
630 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
631 return;
632 }
633
634 /* Set our global state as online. */
635 set_global_winbindd_state_online();
636
637 smb_nscd_flush_user_cache();
638 smb_nscd_flush_group_cache();
639
640 /* Set all our domains as online. */
641 for (domain = domain_list(); domain; domain = domain->next) {
642 if (domain->internal) {
643 continue;
644 }
645 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
646
647 winbindd_flush_negative_conn_cache(domain);
648 set_domain_online_request(domain);
649
650 /* Send an online message to the idmap child when our
651 primary domain comes back online */
652
653 if ( domain->primary ) {
654 struct winbindd_child *idmap = idmap_child();
655
656 if ( idmap->pid != 0 ) {
657 messaging_send_buf(msg_ctx,
658 pid_to_procid(idmap->pid),
659 MSG_WINBIND_ONLINE,
660 (uint8 *)domain->name,
661 strlen(domain->name)+1);
662 }
663 }
664 }
665
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)) {
669 continue;
670 }
671
672 /* Or internal domains (this should not be possible....) */
673 if (child->domain->internal) {
674 continue;
675 }
676
677 /* Each winbindd child should only process requests for one domain - make sure
678 we only set it online / offline for that domain. */
679
680 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
681 (unsigned int)child->pid, child->domain->name ));
682
683 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
684 MSG_WINBIND_ONLINE,
685 (uint8 *)child->domain->name,
686 strlen(child->domain->name)+1);
687 }
688 }
689
690 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
691 {
692 struct winbindd_domain *domain;
693 char *buf = NULL;
694
695 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
696 get_global_winbindd_state_offline() ?
697 "Offline":"Online")) == NULL) {
698 return NULL;
699 }
700
701 for (domain = domain_list(); domain; domain = domain->next) {
702 if ((buf = talloc_asprintf_append_buffer(buf, "%s:%s ",
703 domain->name,
704 domain->online ?
705 "Online":"Offline")) == NULL) {
706 return NULL;
707 }
708 }
709
710 buf = talloc_asprintf_append_buffer(buf, "\n");
711
712 DEBUG(5,("collect_onlinestatus: %s", buf));
713
714 return buf;
715 }
716
717 void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
718 void *private_data,
719 uint32_t msg_type,
720 struct server_id server_id,
721 DATA_BLOB *data)
722 {
723 TALLOC_CTX *mem_ctx;
724 const char *message;
725 struct server_id *sender;
726
727 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
728
729 if (!data->data) {
730 return;
731 }
732
733 sender = (struct server_id *)data->data;
734
735 mem_ctx = talloc_init("winbind_msg_onlinestatus");
736 if (mem_ctx == NULL) {
737 return;
738 }
739
740 message = collect_onlinestatus(mem_ctx);
741 if (message == NULL) {
742 talloc_destroy(mem_ctx);
743 return;
744 }
745
746 messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
747 (uint8 *)message, strlen(message) + 1);
748
749 talloc_destroy(mem_ctx);
750 }
751
752 void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
753 void *private_data,
754 uint32_t msg_type,
755 struct server_id server_id,
756 DATA_BLOB *data)
757 {
758 struct winbindd_child *child;
759
760 DEBUG(10,("winbind_msg_dump_event_list received\n"));
761
762 dump_event_list(winbind_event_context());
763
764 for (child = winbindd_children; child != NULL; child = child->next) {
765
766 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
767 (unsigned int)child->pid));
768
769 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
770 MSG_DUMP_EVENT_LIST,
771 NULL, 0);
772 }
773
774 }
775
776 void winbind_msg_dump_domain_list(struct messaging_context *msg_ctx,
777 void *private_data,
778 uint32_t msg_type,
779 struct server_id server_id,
780 DATA_BLOB *data)
781 {
782 TALLOC_CTX *mem_ctx;
783 const char *message = NULL;
784 struct server_id *sender = NULL;
785 const char *domain = NULL;
786 char *s = NULL;
787 NTSTATUS status;
788 struct winbindd_domain *dom = NULL;
789
790 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
791
792 if (!data || !data->data) {
793 return;
794 }
795
796 if (data->length < sizeof(struct server_id)) {
797 return;
798 }
799
800 mem_ctx = talloc_init("winbind_msg_dump_domain_list");
801 if (!mem_ctx) {
802 return;
803 }
804
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);
808 }
809
810 if (domain) {
811
812 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
813 domain));
814
815 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain,
816 find_domain_from_name_noinit(domain));
817 if (!message) {
818 talloc_destroy(mem_ctx);
819 return;
820 }
821
822 messaging_send_buf(msg_ctx, *sender,
823 MSG_WINBIND_DUMP_DOMAIN_LIST,
824 (uint8_t *)message, strlen(message) + 1);
825
826 talloc_destroy(mem_ctx);
827
828 return;
829 }
830
831 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
832
833 for (dom = domain_list(); dom; dom=dom->next) {
834 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain, dom);
835 if (!message) {
836 talloc_destroy(mem_ctx);
837 return;
838 }
839
840 s = talloc_asprintf_append(s, "%s\n", message);
841 if (!s) {
842 talloc_destroy(mem_ctx);
843 return;
844 }
845 }
846
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",
852 nt_errstr(status)));
853 }
854
855 talloc_destroy(mem_ctx);
856 }
857
858 static void account_lockout_policy_handler(struct event_context *ctx,
859 struct timed_event *te,
860 struct timeval now,
861 void *private_data)
862 {
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;
868 NTSTATUS result;
869
870 DEBUG(10,("account_lockout_policy_handler called\n"));
871
872 TALLOC_FREE(child->lockout_policy_event);
873
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));
878
879 return;
880 }
881
882 methods = child->domain->methods;
883
884 mem_ctx = talloc_init("account_lockout_policy_handler ctx");
885 if (!mem_ctx) {
886 result = NT_STATUS_NO_MEMORY;
887 } else {
888 result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
889 }
890 TALLOC_FREE(mem_ctx);
891
892 if (!NT_STATUS_IS_OK(result)) {
893 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
894 nt_errstr(result)));
895 }
896
897 child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
898 timeval_current_ofs(3600, 0),
899 account_lockout_policy_handler,
900 child);
901 }
902
903 static time_t get_machine_password_timeout(void)
904 {
905 /* until we have gpo support use lp setting */
906 return lp_machine_password_timeout();
907 }
908
909 static bool calculate_next_machine_pwd_change(const char *domain,
910 struct timeval *t)
911 {
912 time_t pass_last_set_time;
913 time_t timeout;
914 time_t next_change;
915 struct timeval tv;
916 char *pw;
917
918 pw = secrets_fetch_machine_password(domain,
919 &pass_last_set_time,
920 NULL);
921
922 if (pw == NULL) {
923 DEBUG(0,("cannot fetch own machine password ????"));
924 return false;
925 }
926
927 SAFE_FREE(pw);
928
929 timeout = get_machine_password_timeout();
930 if (timeout == 0) {
931 DEBUG(10,("machine password never expires\n"));
932 return false;
933 }
934
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)));
941
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);
947
948 if (lp_clustering()) {
949 uint8_t randbuf;
950 /*
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
958 * exact same moment.
959 */
960 generate_random_buffer(&randbuf, sizeof(randbuf));
961 DEBUG(10, ("adding %d seconds randomness\n",
962 (int)randbuf));
963 t->tv_sec += randbuf;
964 }
965 return true;
966 }
967
968 DEBUG(10,("machine password expired, needs immediate change\n"));
969
970 *t = timeval_zero();
971
972 return true;
973 }
974
975 static void machine_password_change_handler(struct event_context *ctx,
976 struct timed_event *te,
977 struct timeval now,
978 void *private_data)
979 {
980 struct winbindd_child *child =
981 (struct winbindd_child *)private_data;
982 struct rpc_pipe_client *netlogon_pipe = NULL;
983 TALLOC_CTX *frame;
984 NTSTATUS result;
985 struct timeval next_change;
986
987 DEBUG(10,("machine_password_change_handler called\n"));
988
989 TALLOC_FREE(child->machine_password_change_event);
990
991 if (!calculate_next_machine_pwd_change(child->domain->name,
992 &next_change)) {
993 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
994 return;
995 }
996
997 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
998 timeval_string(talloc_tos(), &next_change, false)));
999
1000 if (!timeval_expired(&next_change)) {
1001 DEBUG(10, ("Someone else has already changed the pw\n"));
1002 goto done;
1003 }
1004
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));
1009 return;
1010 }
1011
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)));
1017 return;
1018 }
1019
1020 frame = talloc_stackframe();
1021
1022 result = trust_pw_find_change_and_store_it(netlogon_pipe,
1023 frame,
1024 child->domain->name);
1025 TALLOC_FREE(frame);
1026
1027 DEBUG(10, ("machine_password_change_handler: "
1028 "trust_pw_find_change_and_store_it returned %s\n",
1029 nt_errstr(result)));
1030
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);
1038 }
1039
1040 if (!calculate_next_machine_pwd_change(child->domain->name,
1041 &next_change)) {
1042 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1043 return;
1044 }
1045
1046 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1047 timeval_string(talloc_tos(), &next_change, false)));
1048
1049 if (!NT_STATUS_IS_OK(result)) {
1050 struct timeval tmp;
1051 /*
1052 * In case of failure, give the DC a minute to recover
1053 */
1054 tmp = timeval_current_ofs(60, 0);
1055 next_change = timeval_max(&next_change, &tmp);
1056 }
1057
1058 done:
1059 child->machine_password_change_event = event_add_timed(winbind_event_context(), NULL,
1060 next_change,
1061 machine_password_change_handler,
1062 child);
1063 }
1064
1065 /* Deal with a request to go offline. */
1066
1067 static void child_msg_offline(struct messaging_context *msg,
1068 void *private_data,
1069 uint32_t msg_type,
1070 struct server_id server_id,
1071 DATA_BLOB *data)
1072 {
1073 struct winbindd_domain *domain;
1074 struct winbindd_domain *primary_domain = NULL;
1075 const char *domainname = (const char *)data->data;
1076
1077 if (data->data == NULL || data->length == 0) {
1078 return;
1079 }
1080
1081 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
1082
1083 if (!lp_winbind_offline_logon()) {
1084 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1085 return;
1086 }
1087
1088 primary_domain = find_our_domain();
1089
1090 /* Mark the requested domain offline. */
1091
1092 for (domain = domain_list(); domain; domain = domain->next) {
1093 if (domain->internal) {
1094 continue;
1095 }
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
1100 * offline too */
1101 if (domain != primary_domain) {
1102 set_domain_offline(primary_domain);
1103 }
1104 }
1105 }
1106 }
1107
1108 /* Deal with a request to go online. */
1109
1110 static void child_msg_online(struct messaging_context *msg,
1111 void *private_data,
1112 uint32_t msg_type,
1113 struct server_id server_id,
1114 DATA_BLOB *data)
1115 {
1116 struct winbindd_domain *domain;
1117 struct winbindd_domain *primary_domain = NULL;
1118 const char *domainname = (const char *)data->data;
1119
1120 if (data->data == NULL || data->length == 0) {
1121 return;
1122 }
1123
1124 DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
1125
1126 if (!lp_winbind_offline_logon()) {
1127 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1128 return;
1129 }
1130
1131 primary_domain = find_our_domain();
1132
1133 /* Set our global state as online. */
1134 set_global_winbindd_state_online();
1135
1136 /* Try and mark everything online - delete any negative cache entries
1137 to force a reconnect now. */
1138
1139 for (domain = domain_list(); domain; domain = domain->next) {
1140 if (domain->internal) {
1141 continue;
1142 }
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);
1147
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()
1152 * */
1153 if (domain != primary_domain) {
1154 winbindd_flush_negative_conn_cache(primary_domain);
1155 set_domain_online_request(primary_domain);
1156 }
1157 }
1158 }
1159 }
1160
1161 static void child_msg_dump_event_list(struct messaging_context *msg,
1162 void *private_data,
1163 uint32_t msg_type,
1164 struct server_id server_id,
1165 DATA_BLOB *data)
1166 {
1167 DEBUG(5,("child_msg_dump_event_list received\n"));
1168
1169 dump_event_list(winbind_event_context());
1170 }
1171
1172 bool winbindd_reinit_after_fork(const char *logfilename)
1173 {
1174 struct winbindd_domain *domain;
1175 struct winbindd_child *cl;
1176 NTSTATUS status;
1177
1178 status = reinit_after_fork(
1179 winbind_messaging_context(),
1180 winbind_event_context(),
1181 procid_self(),
1182 true);
1183 if (!NT_STATUS_IS_OK(status)) {
1184 DEBUG(0,("reinit_after_fork() failed\n"));
1185 return false;
1186 }
1187
1188 close_conns_after_fork();
1189
1190 if (!override_logfile && logfilename) {
1191 lp_set_logfile(logfilename);
1192 reopen_logs();
1193 }
1194
1195 if (!winbindd_setup_sig_term_handler(false))
1196 return false;
1197 if (!winbindd_setup_sig_hup_handler(override_logfile ? NULL :
1198 logfilename))
1199 return false;
1200
1201 /* Stop zombies in children */
1202 CatchChild();
1203
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(),
1220 MSG_DEBUG, NULL);
1221
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. */
1225
1226 /* Deal with check_online_events. */
1227
1228 for (domain = domain_list(); domain; domain = domain->next) {
1229 TALLOC_FREE(domain->check_online_event);
1230 }
1231
1232 /* Ensure we're not handling a credential cache event inherited
1233 * from our parent. */
1234
1235 ccache_remove_all_after_fork();
1236
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);
1241
1242 /* Children should never be able to send
1243 * each other messages, all messages must
1244 * go through the parent.
1245 */
1246 cl->pid = (pid_t)0;
1247 }
1248 /*
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().
1256 *
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.
1263 */
1264 cl = idmap_child();
1265 cl->pid = (pid_t)0;
1266
1267 return true;
1268 }
1269
1270 /*
1271 * In a child there will be only one domain, reference that here.
1272 */
1273 static struct winbindd_domain *child_domain;
1274
1275 struct winbindd_domain *wb_child_domain(void)
1276 {
1277 return child_domain;
1278 }
1279
1280 static bool fork_domain_child(struct winbindd_child *child)
1281 {
1282 int fdpair[2];
1283 struct winbindd_cli_state state;
1284 struct winbindd_request request;
1285 struct winbindd_response response;
1286 struct winbindd_domain *primary_domain = NULL;
1287
1288 if (child->domain) {
1289 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1290 child->domain->name));
1291 } else {
1292 DEBUG(10, ("fork_domain_child called without domain.\n"));
1293 }
1294
1295 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
1296 DEBUG(0, ("Could not open child pipe: %s\n",
1297 strerror(errno)));
1298 return False;
1299 }
1300
1301 ZERO_STRUCT(state);
1302 state.pid = sys_getpid();
1303 state.request = &request;
1304 state.response = &response;
1305
1306 child->pid = sys_fork();
1307
1308 if (child->pid == -1) {
1309 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
1310 return False;
1311 }
1312
1313 if (child->pid != 0) {
1314 /* Parent */
1315 close(fdpair[0]);
1316 child->next = child->prev = NULL;
1317 DLIST_ADD(winbindd_children, child);
1318 child->sock = fdpair[1];
1319 return True;
1320 }
1321
1322 /* Child */
1323 child_domain = child->domain;
1324
1325 DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
1326
1327 state.sock = fdpair[0];
1328 close(fdpair[1]);
1329
1330 if (!winbindd_reinit_after_fork(child->logfilename)) {
1331 _exit(0);
1332 }
1333
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);
1346
1347
1348 primary_domain = find_our_domain();
1349
1350 if (primary_domain == NULL) {
1351 smb_panic("no primary domain found");
1352 }
1353
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);
1368 }
1369 }
1370 }
1371
1372 /*
1373 * We are in idmap child, make sure that we set the
1374 * check_online_event to bring primary domain online.
1375 */
1376 if (child == idmap_child()) {
1377 set_domain_online_request(primary_domain);
1378 }
1379
1380 /* We might be in the idmap child...*/
1381 if (child->domain && !(child->domain->internal) &&
1382 lp_winbind_offline_logon()) {
1383
1384 set_domain_online_request(child->domain);
1385
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
1390 * child.
1391 * See the code in :
1392 * set_dc_type_and_flags_trustinfo()
1393 * for details.
1394 */
1395 set_domain_online_request(primary_domain);
1396 }
1397
1398 child->lockout_policy_event = event_add_timed(
1399 winbind_event_context(), NULL, timeval_zero(),
1400 account_lockout_policy_handler,
1401 child);
1402 }
1403
1404 if (child->domain && child->domain->primary &&
1405 !USE_KERBEROS_KEYTAB &&
1406 lp_server_role() == ROLE_DOMAIN_MEMBER) {
1407
1408 struct timeval next_change;
1409
1410 if (calculate_next_machine_pwd_change(child->domain->name,
1411 &next_change)) {
1412 child->machine_password_change_event = event_add_timed(
1413 winbind_event_context(), NULL, next_change,
1414 machine_password_change_handler,
1415 child);
1416 }
1417 }
1418
1419 while (1) {
1420
1421 int ret = 0;
1422 fd_set r_fds;
1423 fd_set w_fds;
1424 int maxfd;
1425 struct timeval t;
1426 struct timeval *tp;
1427 TALLOC_CTX *frame = talloc_stackframe();
1428 struct iovec iov[2];
1429 int iov_count;
1430 NTSTATUS status;
1431
1432 if (run_events(winbind_event_context(), &ret, NULL, NULL)) {
1433 TALLOC_FREE(frame);
1434 continue;
1435 }
1436
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;
1443 }
1444
1445 FD_ZERO(&r_fds);
1446 FD_ZERO(&w_fds);
1447 FD_SET(state.sock, &r_fds);
1448 maxfd = state.sock;
1449
1450 /*
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>.
1454 */
1455 t.tv_sec = 999999;
1456 t.tv_usec = 0;
1457
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);
1461 if (tp) {
1462 DEBUG(11,("select will use timeout of %u.%u seconds\n",
1463 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
1464 }
1465
1466 ret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, tp);
1467
1468 if (run_events(winbind_event_context(), &ret, &r_fds, &w_fds)) {
1469 /* We got a signal - continue. */
1470 TALLOC_FREE(frame);
1471 continue;
1472 }
1473
1474 if (ret == 0) {
1475 DEBUG(11,("nothing is ready yet, continue\n"));
1476 TALLOC_FREE(frame);
1477 continue;
1478 }
1479
1480 if (ret == -1 && errno == EINTR) {
1481 /* We got a signal - continue. */
1482 TALLOC_FREE(frame);
1483 continue;
1484 }
1485
1486 if (ret == -1 && errno != EINTR) {
1487 DEBUG(0,("select error occured\n"));
1488 TALLOC_FREE(frame);
1489 perror("select");
1490 _exit(1);
1491 }
1492
1493 /* fetch a request from the main daemon */
1494 status = child_read_request(&state);
1495
1496 if (!NT_STATUS_IS_OK(status)) {
1497 /* we lost contact with our parent */
1498 _exit(0);
1499 }
1500
1501 DEBUG(4,("child daemon request %d\n", (int)state.request->cmd));
1502
1503 ZERO_STRUCTP(state.response);
1504 state.request->null_term = '\0';
1505 state.mem_ctx = frame;
1506 child_process_request(child, &state);
1507
1508 DEBUG(4, ("Finished processing child request %d\n",
1509 (int)state.request->cmd));
1510
1511 SAFE_FREE(state.request->extra_data.data);
1512
1513 iov[0].iov_base = (void *)state.response;
1514 iov[0].iov_len = sizeof(struct winbindd_response);
1515 iov_count = 1;
1516
1517 if (state.response->length > sizeof(struct winbindd_response)) {
1518 iov[1].iov_base =
1519 (void *)state.response->extra_data.data;
1520 iov[1].iov_len = state.response->length-iov[0].iov_len;
1521 iov_count = 2;
1522 }
1523
1524 DEBUG(10, ("Writing %d bytes to parent\n",
1525 (int)state.response->length));
1526
1527 if (write_data_iov(state.sock, iov, iov_count) !=
1528 state.response->length) {
1529 DEBUG(0, ("Could not write result\n"));
1530 exit(1);
1531 }
1532 TALLOC_FREE(frame);
1533 }
1534 }
1535
1536 void winbind_msg_ip_dropped_parent(struct messaging_context *msg_ctx,
1537 void *private_data,
1538 uint32_t msg_type,
1539 struct server_id server_id,
1540 DATA_BLOB *data)
1541 {
1542 struct winbindd_child *child;
1543
1544 winbind_msg_ip_dropped(msg_ctx, private_data, msg_type,
1545 server_id, data);
1546
1547
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);
1551 }
1552 }
reg import