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r20124: clean up nested extern declaration warnings
[Samba/gebeck_regimport.git] / source3 / nsswitch / winbindd_dual.c
blob70af8333c52a46e7dcc6c9d9bf759145d3178680
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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 /*
25 * We fork a child per domain to be able to act non-blocking in the main
26 * winbind daemon. A domain controller thousands of miles away being being
27 * slow replying with a 10.000 user list should not hold up netlogon calls
28 * that can be handled locally.
29 */
30
31 #include "includes.h"
32 #include "winbindd.h"
33
34 #undef DBGC_CLASS
35 #define DBGC_CLASS DBGC_WINBIND
36
37 extern BOOL override_logfile;
38
39 /* Read some data from a client connection */
40
41 static void child_read_request(struct winbindd_cli_state *state)
42 {
43 ssize_t len;
44
45 /* Read data */
46
47 len = read_data(state->sock, (char *)&state->request,
48 sizeof(state->request));
49
50 if (len != sizeof(state->request)) {
51 DEBUG(len > 0 ? 0 : 3, ("Got invalid request length: %d\n", (int)len));
52 state->finished = True;
53 return;
54 }
55
56 if (state->request.extra_len == 0) {
57 state->request.extra_data.data = NULL;
58 return;
59 }
60
61 DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request.extra_len));
62
63 state->request.extra_data.data =
64 SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
65
66 if (state->request.extra_data.data == NULL) {
67 DEBUG(0, ("malloc failed\n"));
68 state->finished = True;
69 return;
70 }
71
72 /* Ensure null termination */
73 state->request.extra_data.data[state->request.extra_len] = '\0';
74
75 len = read_data(state->sock, state->request.extra_data.data,
76 state->request.extra_len);
77
78 if (len != state->request.extra_len) {
79 DEBUG(0, ("Could not read extra data\n"));
80 state->finished = True;
81 return;
82 }
83 }
84
85 /*
86 * Machinery for async requests sent to children. You set up a
87 * winbindd_request, select a child to query, and issue a async_request
88 * call. When the request is completed, the callback function you specified is
89 * called back with the private pointer you gave to async_request.
90 */
91
92 struct winbindd_async_request {
93 struct winbindd_async_request *next, *prev;
94 TALLOC_CTX *mem_ctx;
95 struct winbindd_child *child;
96 struct winbindd_request *request;
97 struct winbindd_response *response;
98 void (*continuation)(void *private_data, BOOL success);
99 void *private_data;
100 };
101
102 static void async_main_request_sent(void *private_data, BOOL success);
103 static void async_request_sent(void *private_data, BOOL success);
104 static void async_reply_recv(void *private_data, BOOL success);
105 static void schedule_async_request(struct winbindd_child *child);
106
107 void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
108 struct winbindd_request *request,
109 struct winbindd_response *response,
110 void (*continuation)(void *private_data, BOOL success),
111 void *private_data)
112 {
113 struct winbindd_async_request *state;
114
115 SMB_ASSERT(continuation != NULL);
116
117 state = TALLOC_P(mem_ctx, struct winbindd_async_request);
118
119 if (state == NULL) {
120 DEBUG(0, ("talloc failed\n"));
121 continuation(private_data, False);
122 return;
123 }
124
125 state->mem_ctx = mem_ctx;
126 state->child = child;
127 state->request = request;
128 state->response = response;
129 state->continuation = continuation;
130 state->private_data = private_data;
131
132 DLIST_ADD_END(child->requests, state, struct winbindd_async_request *);
133
134 schedule_async_request(child);
135
136 return;
137 }
138
139 static void async_main_request_sent(void *private_data, BOOL success)
140 {
141 struct winbindd_async_request *state =
142 talloc_get_type_abort(private_data, struct winbindd_async_request);
143
144 if (!success) {
145 DEBUG(5, ("Could not send async request\n"));
146
147 state->response->length = sizeof(struct winbindd_response);
148 state->response->result = WINBINDD_ERROR;
149 state->continuation(state->private_data, False);
150 return;
151 }
152
153 if (state->request->extra_len == 0) {
154 async_request_sent(private_data, True);
155 return;
156 }
157
158 setup_async_write(&state->child->event, state->request->extra_data.data,
159 state->request->extra_len,
160 async_request_sent, state);
161 }
162
163 static void async_request_sent(void *private_data_data, BOOL success)
164 {
165 struct winbindd_async_request *state =
166 talloc_get_type_abort(private_data_data, struct winbindd_async_request);
167
168 if (!success) {
169 DEBUG(5, ("Could not send async request\n"));
170
171 state->response->length = sizeof(struct winbindd_response);
172 state->response->result = WINBINDD_ERROR;
173 state->continuation(state->private_data, False);
174 return;
175 }
176
177 /* Request successfully sent to the child, setup the wait for reply */
178
179 setup_async_read(&state->child->event,
180 &state->response->result,
181 sizeof(state->response->result),
182 async_reply_recv, state);
183 }
184
185 static void async_reply_recv(void *private_data, BOOL success)
186 {
187 struct winbindd_async_request *state =
188 talloc_get_type_abort(private_data, struct winbindd_async_request);
189 struct winbindd_child *child = state->child;
190
191 state->response->length = sizeof(struct winbindd_response);
192
193 if (!success) {
194 DEBUG(5, ("Could not receive async reply\n"));
195 state->response->result = WINBINDD_ERROR;
196 return;
197 }
198
199 SMB_ASSERT(cache_retrieve_response(child->pid,
200 state->response));
201
202 cache_cleanup_response(child->pid);
203
204 DLIST_REMOVE(child->requests, state);
205
206 schedule_async_request(child);
207
208 state->continuation(state->private_data, True);
209 }
210
211 static BOOL fork_domain_child(struct winbindd_child *child);
212
213 static void schedule_async_request(struct winbindd_child *child)
214 {
215 struct winbindd_async_request *request = child->requests;
216
217 if (request == NULL) {
218 return;
219 }
220
221 if (child->event.flags != 0) {
222 return; /* Busy */
223 }
224
225 if ((child->pid == 0) && (!fork_domain_child(child))) {
226 /* Cancel all outstanding requests */
227
228 while (request != NULL) {
229 /* request might be free'd in the continuation */
230 struct winbindd_async_request *next = request->next;
231 request->continuation(request->private_data, False);
232 request = next;
233 }
234 return;
235 }
236
237 setup_async_write(&child->event, request->request,
238 sizeof(*request->request),
239 async_main_request_sent, request);
240
241 talloc_destroy(child->mem_ctx);
242 return;
243 }
244
245 struct domain_request_state {
246 TALLOC_CTX *mem_ctx;
247 struct winbindd_domain *domain;
248 struct winbindd_request *request;
249 struct winbindd_response *response;
250 void (*continuation)(void *private_data_data, BOOL success);
251 void *private_data_data;
252 };
253
254 static void domain_init_recv(void *private_data_data, BOOL success);
255
256 void async_domain_request(TALLOC_CTX *mem_ctx,
257 struct winbindd_domain *domain,
258 struct winbindd_request *request,
259 struct winbindd_response *response,
260 void (*continuation)(void *private_data_data, BOOL success),
261 void *private_data_data)
262 {
263 struct domain_request_state *state;
264
265 if (domain->initialized) {
266 async_request(mem_ctx, &domain->child, request, response,
267 continuation, private_data_data);
268 return;
269 }
270
271 state = TALLOC_P(mem_ctx, struct domain_request_state);
272 if (state == NULL) {
273 DEBUG(0, ("talloc failed\n"));
274 continuation(private_data_data, False);
275 return;
276 }
277
278 state->mem_ctx = mem_ctx;
279 state->domain = domain;
280 state->request = request;
281 state->response = response;
282 state->continuation = continuation;
283 state->private_data_data = private_data_data;
284
285 init_child_connection(domain, domain_init_recv, state);
286 }
287
288 static void recvfrom_child(void *private_data_data, BOOL success)
289 {
290 struct winbindd_cli_state *state =
291 talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
292 enum winbindd_result result = state->response.result;
293
294 /* This is an optimization: The child has written directly to the
295 * response buffer. The request itself is still in pending state,
296 * state that in the result code. */
297
298 state->response.result = WINBINDD_PENDING;
299
300 if ((!success) || (result != WINBINDD_OK)) {
301 request_error(state);
302 return;
303 }
304
305 request_ok(state);
306 }
307
308 void sendto_child(struct winbindd_cli_state *state,
309 struct winbindd_child *child)
310 {
311 async_request(state->mem_ctx, child, &state->request,
312 &state->response, recvfrom_child, state);
313 }
314
315 void sendto_domain(struct winbindd_cli_state *state,
316 struct winbindd_domain *domain)
317 {
318 async_domain_request(state->mem_ctx, domain,
319 &state->request, &state->response,
320 recvfrom_child, state);
321 }
322
323 static void domain_init_recv(void *private_data_data, BOOL success)
324 {
325 struct domain_request_state *state =
326 talloc_get_type_abort(private_data_data, struct domain_request_state);
327
328 if (!success) {
329 DEBUG(5, ("Domain init returned an error\n"));
330 state->continuation(state->private_data_data, False);
331 return;
332 }
333
334 async_request(state->mem_ctx, &state->domain->child,
335 state->request, state->response,
336 state->continuation, state->private_data_data);
337 }
338
339 struct winbindd_child_dispatch_table {
340 enum winbindd_cmd cmd;
341 enum winbindd_result (*fn)(struct winbindd_domain *domain,
342 struct winbindd_cli_state *state);
343 const char *winbindd_cmd_name;
344 };
345
346 static struct winbindd_child_dispatch_table child_dispatch_table[] = {
347
348 { WINBINDD_LOOKUPSID, winbindd_dual_lookupsid, "LOOKUPSID" },
349 { WINBINDD_LOOKUPNAME, winbindd_dual_lookupname, "LOOKUPNAME" },
350 { WINBINDD_LOOKUPRIDS, winbindd_dual_lookuprids, "LOOKUPRIDS" },
351 { WINBINDD_LIST_TRUSTDOM, winbindd_dual_list_trusted_domains, "LIST_TRUSTDOM" },
352 { WINBINDD_INIT_CONNECTION, winbindd_dual_init_connection, "INIT_CONNECTION" },
353 { WINBINDD_GETDCNAME, winbindd_dual_getdcname, "GETDCNAME" },
354 { WINBINDD_SHOW_SEQUENCE, winbindd_dual_show_sequence, "SHOW_SEQUENCE" },
355 { WINBINDD_PAM_AUTH, winbindd_dual_pam_auth, "PAM_AUTH" },
356 { WINBINDD_PAM_AUTH_CRAP, winbindd_dual_pam_auth_crap, "AUTH_CRAP" },
357 { WINBINDD_PAM_LOGOFF, winbindd_dual_pam_logoff, "PAM_LOGOFF" },
358 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP,winbindd_dual_pam_chng_pswd_auth_crap,"CHNG_PSWD_AUTH_CRAP" },
359 { WINBINDD_CHECK_MACHACC, winbindd_dual_check_machine_acct, "CHECK_MACHACC" },
360 { WINBINDD_DUAL_SID2UID, winbindd_dual_sid2uid, "DUAL_SID2UID" },
361 { WINBINDD_DUAL_SID2GID, winbindd_dual_sid2gid, "DUAL_SID2GID" },
362 { WINBINDD_DUAL_SIDS2XIDS, winbindd_dual_sids2xids, "DUAL_SIDS2XIDS" },
363 { WINBINDD_DUAL_UID2SID, winbindd_dual_uid2sid, "DUAL_UID2SID" },
364 { WINBINDD_DUAL_GID2SID, winbindd_dual_gid2sid, "DUAL_GID2SID" },
365 { WINBINDD_DUAL_UID2NAME, winbindd_dual_uid2name, "DUAL_UID2NAME" },
366 { WINBINDD_DUAL_NAME2UID, winbindd_dual_name2uid, "DUAL_NAME2UID" },
367 { WINBINDD_DUAL_GID2NAME, winbindd_dual_gid2name, "DUAL_GID2NAME" },
368 { WINBINDD_DUAL_NAME2GID, winbindd_dual_name2gid, "DUAL_NAME2GID" },
369 { WINBINDD_DUAL_SET_MAPPING, winbindd_dual_set_mapping, "DUAL_SET_MAPPING" },
370 { WINBINDD_DUAL_SET_HWM, winbindd_dual_set_hwm, "DUAL_SET_HWMS" },
371 { WINBINDD_DUAL_DUMP_MAPS, winbindd_dual_dump_maps, "DUAL_DUMP_MAPS" },
372 { WINBINDD_DUAL_USERINFO, winbindd_dual_userinfo, "DUAL_USERINFO" },
373 { WINBINDD_ALLOCATE_UID, winbindd_dual_allocate_uid, "ALLOCATE_UID" },
374 { WINBINDD_ALLOCATE_GID, winbindd_dual_allocate_gid, "ALLOCATE_GID" },
375 { WINBINDD_GETUSERDOMGROUPS, winbindd_dual_getuserdomgroups, "GETUSERDOMGROUPS" },
376 { WINBINDD_DUAL_GETSIDALIASES, winbindd_dual_getsidaliases, "GETSIDALIASES" },
377 { WINBINDD_CCACHE_NTLMAUTH, winbindd_dual_ccache_ntlm_auth, "CCACHE_NTLM_AUTH" },
378 /* End of list */
379
380 { WINBINDD_NUM_CMDS, NULL, "NONE" }
381 };
382
383 static void child_process_request(struct winbindd_domain *domain,
384 struct winbindd_cli_state *state)
385 {
386 struct winbindd_child_dispatch_table *table;
387
388 /* Free response data - we may be interrupted and receive another
389 command before being able to send this data off. */
390
391 state->response.result = WINBINDD_ERROR;
392 state->response.length = sizeof(struct winbindd_response);
393
394 state->mem_ctx = talloc_init("winbind request");
395 if (state->mem_ctx == NULL)
396 return;
397
398 /* Process command */
399
400 for (table = child_dispatch_table; table->fn; table++) {
401 if (state->request.cmd == table->cmd) {
402 DEBUG(10,("process_request: request fn %s\n",
403 table->winbindd_cmd_name ));
404 state->response.result = table->fn(domain, state);
405 break;
406 }
407 }
408
409 if (!table->fn) {
410 DEBUG(10,("process_request: unknown request fn number %d\n",
411 (int)state->request.cmd ));
412 state->response.result = WINBINDD_ERROR;
413 }
414
415 talloc_destroy(state->mem_ctx);
416 }
417
418 void setup_domain_child(struct winbindd_domain *domain,
419 struct winbindd_child *child,
420 const char *explicit_logfile)
421 {
422 if (explicit_logfile != NULL) {
423 pstr_sprintf(child->logfilename, "%s/log.winbindd-%s",
424 dyn_LOGFILEBASE, explicit_logfile);
425 } else if (domain != NULL) {
426 pstr_sprintf(child->logfilename, "%s/log.wb-%s",
427 dyn_LOGFILEBASE, domain->name);
428 } else {
429 smb_panic("Internal error: domain == NULL && "
430 "explicit_logfile == NULL");
431 }
432
433 child->domain = domain;
434 }
435
436 struct winbindd_child *children = NULL;
437
438 void winbind_child_died(pid_t pid)
439 {
440 struct winbindd_child *child;
441
442 for (child = children; child != NULL; child = child->next) {
443 if (child->pid == pid) {
444 break;
445 }
446 }
447
448 if (child == NULL) {
449 DEBUG(0, ("Unknown child %d died!\n", pid));
450 return;
451 }
452
453 remove_fd_event(&child->event);
454 close(child->event.fd);
455 child->event.fd = 0;
456 child->event.flags = 0;
457 child->pid = 0;
458
459 schedule_async_request(child);
460 }
461
462 /* Ensure any negative cache entries with the netbios or realm names are removed. */
463
464 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
465 {
466 flush_negative_conn_cache_for_domain(domain->name);
467 if (*domain->alt_name) {
468 flush_negative_conn_cache_for_domain(domain->alt_name);
469 }
470 }
471
472 /* Set our domains as offline and forward the offline message to our children. */
473
474 void winbind_msg_offline(int msg_type, struct process_id src, void *buf, size_t len)
475 {
476 struct winbindd_child *child;
477 struct winbindd_domain *domain;
478
479 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
480
481 if (!lp_winbind_offline_logon()) {
482 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
483 return;
484 }
485
486 /* Set our global state as offline. */
487 if (!set_global_winbindd_state_offline()) {
488 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
489 return;
490 }
491
492 /* Set all our domains as offline. */
493 for (domain = domain_list(); domain; domain = domain->next) {
494 if (domain->internal) {
495 continue;
496 }
497 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
498 set_domain_offline(domain);
499 }
500
501 for (child = children; child != NULL; child = child->next) {
502 /* Don't send message to idmap child. */
503 if (!child->domain || (child == idmap_child())) {
504 continue;
505 }
506
507 /* Or internal domains (this should not be possible....) */
508 if (child->domain->internal) {
509 continue;
510 }
511
512 /* Each winbindd child should only process requests for one domain - make sure
513 we only set it online / offline for that domain. */
514
515 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
516 (unsigned int)child->pid, domain->name ));
517
518 message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_OFFLINE, child->domain->name,
519 strlen(child->domain->name)+1, False);
520 }
521 }
522
523 /* Set our domains as online and forward the online message to our children. */
524
525 void winbind_msg_online(int msg_type, struct process_id src, void *buf, size_t len)
526 {
527 struct winbindd_child *child;
528 struct winbindd_domain *domain;
529
530 DEBUG(10,("winbind_msg_online: got online message.\n"));
531
532 if (!lp_winbind_offline_logon()) {
533 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
534 return;
535 }
536
537 /* Set our global state as online. */
538 set_global_winbindd_state_online();
539
540 smb_nscd_flush_user_cache();
541 smb_nscd_flush_group_cache();
542
543 /* Set all our domains as online. */
544 for (domain = domain_list(); domain; domain = domain->next) {
545 if (domain->internal) {
546 continue;
547 }
548 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
549
550 winbindd_flush_negative_conn_cache(domain);
551 set_domain_online_request(domain);
552 }
553
554 for (child = children; child != NULL; child = child->next) {
555 /* Don't send message to idmap child. */
556 if (!child->domain || (child == idmap_child())) {
557 continue;
558 }
559
560 /* Or internal domains (this should not be possible....) */
561 if (child->domain->internal) {
562 continue;
563 }
564
565 /* Each winbindd child should only process requests for one domain - make sure
566 we only set it online / offline for that domain. */
567
568 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
569 (unsigned int)child->pid, child->domain->name ));
570
571 message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_ONLINE, child->domain->name,
572 strlen(child->domain->name)+1, False);
573 }
574 }
575
576 /* Forward the online/offline messages to our children. */
577 void winbind_msg_onlinestatus(int msg_type, struct process_id src, void *buf, size_t len)
578 {
579 struct winbindd_child *child;
580
581 DEBUG(10,("winbind_msg_onlinestatus: got onlinestatus message.\n"));
582
583 for (child = children; child != NULL; child = child->next) {
584 if (child->domain && child->domain->primary) {
585 DEBUG(10,("winbind_msg_onlinestatus: "
586 "sending message to pid %u of primary domain.\n",
587 (unsigned int)child->pid));
588 message_send_pid(pid_to_procid(child->pid),
589 MSG_WINBIND_ONLINESTATUS, buf, len, False);
590 break;
591 }
592 }
593 }
594
595
596 static void account_lockout_policy_handler(struct timed_event *te,
597 const struct timeval *now,
598 void *private_data)
599 {
600 struct winbindd_child *child =
601 (struct winbindd_child *)private_data;
602
603 struct winbindd_methods *methods;
604 SAM_UNK_INFO_12 lockout_policy;
605 NTSTATUS result;
606
607 DEBUG(10,("account_lockout_policy_handler called\n"));
608
609 if (child->lockout_policy_event) {
610 TALLOC_FREE(child->lockout_policy_event);
611 }
612
613 methods = child->domain->methods;
614
615 result = methods->lockout_policy(child->domain, child->mem_ctx, &lockout_policy);
616 if (!NT_STATUS_IS_OK(result)) {
617 DEBUG(10,("account_lockout_policy_handler: failed to call lockout_policy\n"));
618 return;
619 }
620
621 child->lockout_policy_event = add_timed_event(child->mem_ctx,
622 timeval_current_ofs(3600, 0),
623 "account_lockout_policy_handler",
624 account_lockout_policy_handler,
625 child);
626 }
627
628 /* Deal with a request to go offline. */
629
630 static void child_msg_offline(int msg_type, struct process_id src, void *buf, size_t len)
631 {
632 struct winbindd_domain *domain;
633 const char *domainname = (const char *)buf;
634
635 if (buf == NULL || len == 0) {
636 return;
637 }
638
639 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
640
641 if (!lp_winbind_offline_logon()) {
642 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
643 return;
644 }
645
646 /* Set our global state as offline. */
647 if (!set_global_winbindd_state_offline()) {
648 DEBUG(10,("child_msg_offline: offline request failed.\n"));
649 return;
650 }
651
652 /* Mark the requested domain offline. */
653
654 for (domain = domain_list(); domain; domain = domain->next) {
655 if (domain->internal) {
656 continue;
657 }
658 if (strequal(domain->name, domainname)) {
659 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
660 set_domain_offline(domain);
661 }
662 }
663 }
664
665 /* Deal with a request to go online. */
666
667 static void child_msg_online(int msg_type, struct process_id src, void *buf, size_t len)
668 {
669 struct winbindd_domain *domain;
670 const char *domainname = (const char *)buf;
671
672 if (buf == NULL || len == 0) {
673 return;
674 }
675
676 DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
677
678 if (!lp_winbind_offline_logon()) {
679 DEBUG(10,("child_msg_online: rejecting online message.\n"));
680 return;
681 }
682
683 /* Set our global state as online. */
684 set_global_winbindd_state_online();
685
686 /* Try and mark everything online - delete any negative cache entries
687 to force a reconnect now. */
688
689 for (domain = domain_list(); domain; domain = domain->next) {
690 if (domain->internal) {
691 continue;
692 }
693 if (strequal(domain->name, domainname)) {
694 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
695 winbindd_flush_negative_conn_cache(domain);
696 set_domain_online_request(domain);
697 }
698 }
699 }
700
701 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
702 {
703 struct winbindd_domain *domain;
704 char *buf = NULL;
705
706 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
707 get_global_winbindd_state_offline() ?
708 "Offline":"Online")) == NULL) {
709 return NULL;
710 }
711
712 for (domain = domain_list(); domain; domain = domain->next) {
713 if ((buf = talloc_asprintf_append(buf, "%s:%s ",
714 domain->name,
715 domain->online ?
716 "Online":"Offline")) == NULL) {
717 return NULL;
718 }
719 }
720
721 buf = talloc_asprintf_append(buf, "\n");
722
723 DEBUG(5,("collect_onlinestatus: %s", buf));
724
725 return buf;
726 }
727
728 static void child_msg_onlinestatus(int msg_type, struct process_id src, void *buf, size_t len)
729 {
730 TALLOC_CTX *mem_ctx;
731 const char *message;
732 struct process_id *sender;
733
734 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
735
736 if (!buf) {
737 return;
738 }
739
740 sender = (struct process_id *)buf;
741
742 mem_ctx = talloc_init("winbind_msg_onlinestatus");
743 if (mem_ctx == NULL) {
744 return;
745 }
746
747 message = collect_onlinestatus(mem_ctx);
748 if (message == NULL) {
749 talloc_destroy(mem_ctx);
750 return;
751 }
752
753 message_send_pid(*sender, MSG_WINBIND_ONLINESTATUS,
754 message, strlen(message) + 1, True);
755
756 talloc_destroy(mem_ctx);
757 }
758
759 static BOOL fork_domain_child(struct winbindd_child *child)
760 {
761 int fdpair[2];
762 struct winbindd_cli_state state;
763 struct winbindd_domain *domain;
764
765 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
766 DEBUG(0, ("Could not open child pipe: %s\n",
767 strerror(errno)));
768 return False;
769 }
770
771 ZERO_STRUCT(state);
772 state.pid = getpid();
773
774 /* Ensure we don't process messages whilst we're
775 changing the disposition for the child. */
776 message_block();
777
778 child->pid = sys_fork();
779
780 if (child->pid == -1) {
781 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
782 message_unblock();
783 return False;
784 }
785
786 if (child->pid != 0) {
787 /* Parent */
788 close(fdpair[0]);
789 child->next = child->prev = NULL;
790 DLIST_ADD(children, child);
791 child->event.fd = fdpair[1];
792 child->event.flags = 0;
793 child->requests = NULL;
794 add_fd_event(&child->event);
795 /* We're ok with online/offline messages now. */
796 message_unblock();
797 return True;
798 }
799
800 /* Child */
801
802 state.sock = fdpair[0];
803 close(fdpair[1]);
804
805 /* tdb needs special fork handling */
806 if (tdb_reopen_all(1) == -1) {
807 DEBUG(0,("tdb_reopen_all failed.\n"));
808 _exit(0);
809 }
810
811 close_conns_after_fork();
812
813 if (!override_logfile) {
814 lp_set_logfile(child->logfilename);
815 reopen_logs();
816 }
817
818 /* Don't handle the same messages as our parent. */
819 message_deregister(MSG_SMB_CONF_UPDATED);
820 message_deregister(MSG_SHUTDOWN);
821 message_deregister(MSG_WINBIND_OFFLINE);
822 message_deregister(MSG_WINBIND_ONLINE);
823 message_deregister(MSG_WINBIND_ONLINESTATUS);
824
825 /* The child is ok with online/offline messages now. */
826 message_unblock();
827
828 child->mem_ctx = talloc_init("child_mem_ctx");
829 if (child->mem_ctx == NULL) {
830 return False;
831 }
832
833 if (child->domain != NULL && lp_winbind_offline_logon()) {
834 /* We might be in the idmap child...*/
835 child->lockout_policy_event = add_timed_event(
836 child->mem_ctx, timeval_zero(),
837 "account_lockout_policy_handler",
838 account_lockout_policy_handler,
839 child);
840 }
841
842 /* Handle online/offline messages. */
843 message_register(MSG_WINBIND_OFFLINE,child_msg_offline);
844 message_register(MSG_WINBIND_ONLINE,child_msg_online);
845 message_register(MSG_WINBIND_ONLINESTATUS,child_msg_onlinestatus);
846
847 if ( child->domain ) {
848 child->domain->startup = True;
849 child->domain->startup_time = time(NULL);
850 }
851
852 /* Ensure we have no pending check_online events other
853 than one for this domain. */
854
855 for (domain = domain_list(); domain; domain = domain->next) {
856 if (domain != child->domain) {
857 if (domain->check_online_event) {
858 TALLOC_FREE(domain->check_online_event);
859 }
860 }
861 }
862
863 /* Ensure we're not handling an event inherited from
864 our parent. */
865
866 cancel_named_event("krb5_ticket_refresh_handler");
867
868 while (1) {
869
870 int ret;
871 fd_set read_fds;
872 struct timeval t;
873 struct timeval *tp;
874 struct timeval now;
875
876 /* free up any talloc memory */
877 lp_TALLOC_FREE();
878 main_loop_TALLOC_FREE();
879
880 run_events();
881
882 GetTimeOfDay(&now);
883
884 if (child->domain && child->domain->startup &&
885 (now.tv_sec > child->domain->startup_time + 30)) {
886 /* No longer in "startup" mode. */
887 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
888 child->domain->name ));
889 child->domain->startup = False;
890 }
891
892 tp = get_timed_events_timeout(&t);
893 if (tp) {
894 DEBUG(11,("select will use timeout of %u.%u seconds\n",
895 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
896 }
897
898 /* Handle messages */
899
900 message_dispatch();
901
902 FD_ZERO(&read_fds);
903 FD_SET(state.sock, &read_fds);
904
905 ret = sys_select(state.sock + 1, &read_fds, NULL, NULL, tp);
906
907 if (ret == 0) {
908 DEBUG(11,("nothing is ready yet, continue\n"));
909 continue;
910 }
911
912 if (ret == -1 && errno == EINTR) {
913 /* We got a signal - continue. */
914 continue;
915 }
916
917 if (ret == -1 && errno != EINTR) {
918 DEBUG(0,("select error occured\n"));
919 perror("select");
920 return False;
921 }
922
923 /* fetch a request from the main daemon */
924 child_read_request(&state);
925
926 if (state.finished) {
927 /* we lost contact with our parent */
928 exit(0);
929 }
930
931 DEBUG(4,("child daemon request %d\n", (int)state.request.cmd));
932
933 ZERO_STRUCT(state.response);
934 state.request.null_term = '\0';
935 child_process_request(child->domain, &state);
936
937 SAFE_FREE(state.request.extra_data.data);
938
939 cache_store_response(sys_getpid(), &state.response);
940
941 SAFE_FREE(state.response.extra_data.data);
942
943 /* We just send the result code back, the result
944 * structure needs to be fetched via the
945 * winbindd_cache. Hmm. That needs fixing... */
946
947 if (write_data(state.sock,
948 (const char *)&state.response.result,
949 sizeof(state.response.result)) !=
950 sizeof(state.response.result)) {
951 DEBUG(0, ("Could not write result\n"));
952 exit(1);
953 }
954 }
955 }
reg import