?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
r21585: Start syncing the monster that will become 3.0.25pre1
[Samba.git] / source / nsswitch / winbindd_dual.c
blobedb4fa504b11420ba3c4095cca3bc53faa306b6c
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
196 cache_cleanup_response(child->pid);
197 DLIST_REMOVE(child->requests, state);
198
199 state->response->result = WINBINDD_ERROR;
200 state->continuation(state->private_data, False);
201 return;
202 }
203
204 SMB_ASSERT(cache_retrieve_response(child->pid,
205 state->response));
206
207 cache_cleanup_response(child->pid);
208
209 DLIST_REMOVE(child->requests, state);
210
211 schedule_async_request(child);
212
213 state->continuation(state->private_data, True);
214 }
215
216 static BOOL fork_domain_child(struct winbindd_child *child);
217
218 static void schedule_async_request(struct winbindd_child *child)
219 {
220 struct winbindd_async_request *request = child->requests;
221
222 if (request == NULL) {
223 return;
224 }
225
226 if (child->event.flags != 0) {
227 return; /* Busy */
228 }
229
230 if ((child->pid == 0) && (!fork_domain_child(child))) {
231 /* Cancel all outstanding requests */
232
233 while (request != NULL) {
234 /* request might be free'd in the continuation */
235 struct winbindd_async_request *next = request->next;
236 request->continuation(request->private_data, False);
237 request = next;
238 }
239 return;
240 }
241
242 setup_async_write(&child->event, request->request,
243 sizeof(*request->request),
244 async_main_request_sent, request);
245
246 return;
247 }
248
249 struct domain_request_state {
250 TALLOC_CTX *mem_ctx;
251 struct winbindd_domain *domain;
252 struct winbindd_request *request;
253 struct winbindd_response *response;
254 void (*continuation)(void *private_data_data, BOOL success);
255 void *private_data_data;
256 };
257
258 static void domain_init_recv(void *private_data_data, BOOL success);
259
260 void async_domain_request(TALLOC_CTX *mem_ctx,
261 struct winbindd_domain *domain,
262 struct winbindd_request *request,
263 struct winbindd_response *response,
264 void (*continuation)(void *private_data_data, BOOL success),
265 void *private_data_data)
266 {
267 struct domain_request_state *state;
268
269 if (domain->initialized) {
270 async_request(mem_ctx, &domain->child, request, response,
271 continuation, private_data_data);
272 return;
273 }
274
275 state = TALLOC_P(mem_ctx, struct domain_request_state);
276 if (state == NULL) {
277 DEBUG(0, ("talloc failed\n"));
278 continuation(private_data_data, False);
279 return;
280 }
281
282 state->mem_ctx = mem_ctx;
283 state->domain = domain;
284 state->request = request;
285 state->response = response;
286 state->continuation = continuation;
287 state->private_data_data = private_data_data;
288
289 init_child_connection(domain, domain_init_recv, state);
290 }
291
292 static void recvfrom_child(void *private_data_data, BOOL success)
293 {
294 struct winbindd_cli_state *state =
295 talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
296 enum winbindd_result result = state->response.result;
297
298 /* This is an optimization: The child has written directly to the
299 * response buffer. The request itself is still in pending state,
300 * state that in the result code. */
301
302 state->response.result = WINBINDD_PENDING;
303
304 if ((!success) || (result != WINBINDD_OK)) {
305 request_error(state);
306 return;
307 }
308
309 request_ok(state);
310 }
311
312 void sendto_child(struct winbindd_cli_state *state,
313 struct winbindd_child *child)
314 {
315 async_request(state->mem_ctx, child, &state->request,
316 &state->response, recvfrom_child, state);
317 }
318
319 void sendto_domain(struct winbindd_cli_state *state,
320 struct winbindd_domain *domain)
321 {
322 async_domain_request(state->mem_ctx, domain,
323 &state->request, &state->response,
324 recvfrom_child, state);
325 }
326
327 static void domain_init_recv(void *private_data_data, BOOL success)
328 {
329 struct domain_request_state *state =
330 talloc_get_type_abort(private_data_data, struct domain_request_state);
331
332 if (!success) {
333 DEBUG(5, ("Domain init returned an error\n"));
334 state->continuation(state->private_data_data, False);
335 return;
336 }
337
338 async_request(state->mem_ctx, &state->domain->child,
339 state->request, state->response,
340 state->continuation, state->private_data_data);
341 }
342
343 struct winbindd_child_dispatch_table {
344 enum winbindd_cmd cmd;
345 enum winbindd_result (*fn)(struct winbindd_domain *domain,
346 struct winbindd_cli_state *state);
347 const char *winbindd_cmd_name;
348 };
349
350 static struct winbindd_child_dispatch_table child_dispatch_table[] = {
351
352 { WINBINDD_LOOKUPSID, winbindd_dual_lookupsid, "LOOKUPSID" },
353 { WINBINDD_LOOKUPNAME, winbindd_dual_lookupname, "LOOKUPNAME" },
354 { WINBINDD_LOOKUPRIDS, winbindd_dual_lookuprids, "LOOKUPRIDS" },
355 { WINBINDD_LIST_TRUSTDOM, winbindd_dual_list_trusted_domains, "LIST_TRUSTDOM" },
356 { WINBINDD_INIT_CONNECTION, winbindd_dual_init_connection, "INIT_CONNECTION" },
357 { WINBINDD_GETDCNAME, winbindd_dual_getdcname, "GETDCNAME" },
358 { WINBINDD_SHOW_SEQUENCE, winbindd_dual_show_sequence, "SHOW_SEQUENCE" },
359 { WINBINDD_PAM_AUTH, winbindd_dual_pam_auth, "PAM_AUTH" },
360 { WINBINDD_PAM_AUTH_CRAP, winbindd_dual_pam_auth_crap, "AUTH_CRAP" },
361 { WINBINDD_PAM_LOGOFF, winbindd_dual_pam_logoff, "PAM_LOGOFF" },
362 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP,winbindd_dual_pam_chng_pswd_auth_crap,"CHNG_PSWD_AUTH_CRAP" },
363 { WINBINDD_PAM_CHAUTHTOK, winbindd_dual_pam_chauthtok, "PAM_CHAUTHTOK" },
364 { WINBINDD_CHECK_MACHACC, winbindd_dual_check_machine_acct, "CHECK_MACHACC" },
365 { WINBINDD_DUAL_SID2UID, winbindd_dual_sid2uid, "DUAL_SID2UID" },
366 { WINBINDD_DUAL_SID2GID, winbindd_dual_sid2gid, "DUAL_SID2GID" },
367 { WINBINDD_DUAL_SIDS2XIDS, winbindd_dual_sids2xids, "DUAL_SIDS2XIDS" },
368 { WINBINDD_DUAL_UID2SID, winbindd_dual_uid2sid, "DUAL_UID2SID" },
369 { WINBINDD_DUAL_GID2SID, winbindd_dual_gid2sid, "DUAL_GID2SID" },
370 { WINBINDD_DUAL_UID2NAME, winbindd_dual_uid2name, "DUAL_UID2NAME" },
371 { WINBINDD_DUAL_NAME2UID, winbindd_dual_name2uid, "DUAL_NAME2UID" },
372 { WINBINDD_DUAL_GID2NAME, winbindd_dual_gid2name, "DUAL_GID2NAME" },
373 { WINBINDD_DUAL_NAME2GID, winbindd_dual_name2gid, "DUAL_NAME2GID" },
374 { WINBINDD_DUAL_SET_MAPPING, winbindd_dual_set_mapping, "DUAL_SET_MAPPING" },
375 { WINBINDD_DUAL_SET_HWM, winbindd_dual_set_hwm, "DUAL_SET_HWMS" },
376 { WINBINDD_DUAL_DUMP_MAPS, winbindd_dual_dump_maps, "DUAL_DUMP_MAPS" },
377 { WINBINDD_DUAL_USERINFO, winbindd_dual_userinfo, "DUAL_USERINFO" },
378 { WINBINDD_ALLOCATE_UID, winbindd_dual_allocate_uid, "ALLOCATE_UID" },
379 { WINBINDD_ALLOCATE_GID, winbindd_dual_allocate_gid, "ALLOCATE_GID" },
380 { WINBINDD_GETUSERDOMGROUPS, winbindd_dual_getuserdomgroups, "GETUSERDOMGROUPS" },
381 { WINBINDD_DUAL_GETSIDALIASES, winbindd_dual_getsidaliases, "GETSIDALIASES" },
382 { WINBINDD_CCACHE_NTLMAUTH, winbindd_dual_ccache_ntlm_auth, "CCACHE_NTLM_AUTH" },
383 /* End of list */
384
385 { WINBINDD_NUM_CMDS, NULL, "NONE" }
386 };
387
388 static void child_process_request(struct winbindd_domain *domain,
389 struct winbindd_cli_state *state)
390 {
391 struct winbindd_child_dispatch_table *table;
392
393 /* Free response data - we may be interrupted and receive another
394 command before being able to send this data off. */
395
396 state->response.result = WINBINDD_ERROR;
397 state->response.length = sizeof(struct winbindd_response);
398
399 state->mem_ctx = talloc_init("winbind request");
400 if (state->mem_ctx == NULL)
401 return;
402
403 /* Process command */
404
405 for (table = child_dispatch_table; table->fn; table++) {
406 if (state->request.cmd == table->cmd) {
407 DEBUG(10,("process_request: request fn %s\n",
408 table->winbindd_cmd_name ));
409 state->response.result = table->fn(domain, state);
410 break;
411 }
412 }
413
414 if (!table->fn) {
415 DEBUG(10,("process_request: unknown request fn number %d\n",
416 (int)state->request.cmd ));
417 state->response.result = WINBINDD_ERROR;
418 }
419
420 talloc_destroy(state->mem_ctx);
421 }
422
423 void setup_domain_child(struct winbindd_domain *domain,
424 struct winbindd_child *child,
425 const char *explicit_logfile)
426 {
427 if (explicit_logfile != NULL) {
428 pstr_sprintf(child->logfilename, "%s/log.winbindd-%s",
429 dyn_LOGFILEBASE, explicit_logfile);
430 } else if (domain != NULL) {
431 pstr_sprintf(child->logfilename, "%s/log.wb-%s",
432 dyn_LOGFILEBASE, domain->name);
433 } else {
434 smb_panic("Internal error: domain == NULL && "
435 "explicit_logfile == NULL");
436 }
437
438 child->domain = domain;
439 }
440
441 struct winbindd_child *children = NULL;
442
443 void winbind_child_died(pid_t pid)
444 {
445 struct winbindd_child *child;
446
447 for (child = children; child != NULL; child = child->next) {
448 if (child->pid == pid) {
449 break;
450 }
451 }
452
453 if (child == NULL) {
454 DEBUG(0, ("Unknown child %d died!\n", pid));
455 return;
456 }
457
458 remove_fd_event(&child->event);
459 close(child->event.fd);
460 child->event.fd = 0;
461 child->event.flags = 0;
462 child->pid = 0;
463
464 schedule_async_request(child);
465 }
466
467 /* Ensure any negative cache entries with the netbios or realm names are removed. */
468
469 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
470 {
471 flush_negative_conn_cache_for_domain(domain->name);
472 if (*domain->alt_name) {
473 flush_negative_conn_cache_for_domain(domain->alt_name);
474 }
475 }
476
477 /* Set our domains as offline and forward the offline message to our children. */
478
479 void winbind_msg_offline(int msg_type, struct process_id src,
480 void *buf, size_t len, void *private_data)
481 {
482 struct winbindd_child *child;
483 struct winbindd_domain *domain;
484
485 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
486
487 if (!lp_winbind_offline_logon()) {
488 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
489 return;
490 }
491
492 /* Set our global state as offline. */
493 if (!set_global_winbindd_state_offline()) {
494 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
495 return;
496 }
497
498 /* Set all our domains as offline. */
499 for (domain = domain_list(); domain; domain = domain->next) {
500 if (domain->internal) {
501 continue;
502 }
503 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
504 set_domain_offline(domain);
505 }
506
507 for (child = children; child != NULL; child = child->next) {
508 /* Don't send message to idmap child. */
509 if (!child->domain || (child == idmap_child())) {
510 continue;
511 }
512
513 /* Or internal domains (this should not be possible....) */
514 if (child->domain->internal) {
515 continue;
516 }
517
518 /* Each winbindd child should only process requests for one domain - make sure
519 we only set it online / offline for that domain. */
520
521 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
522 (unsigned int)child->pid, domain->name ));
523
524 message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_OFFLINE, child->domain->name,
525 strlen(child->domain->name)+1, False);
526 }
527 }
528
529 /* Set our domains as online and forward the online message to our children. */
530
531 void winbind_msg_online(int msg_type, struct process_id src,
532 void *buf, size_t len, void *private_data)
533 {
534 struct winbindd_child *child;
535 struct winbindd_domain *domain;
536
537 DEBUG(10,("winbind_msg_online: got online message.\n"));
538
539 if (!lp_winbind_offline_logon()) {
540 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
541 return;
542 }
543
544 /* Set our global state as online. */
545 set_global_winbindd_state_online();
546
547 smb_nscd_flush_user_cache();
548 smb_nscd_flush_group_cache();
549
550 /* Set all our domains as online. */
551 for (domain = domain_list(); domain; domain = domain->next) {
552 if (domain->internal) {
553 continue;
554 }
555 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
556
557 winbindd_flush_negative_conn_cache(domain);
558 set_domain_online_request(domain);
559 }
560
561 for (child = children; child != NULL; child = child->next) {
562 /* Don't send message to idmap child. */
563 if (!child->domain || (child == idmap_child())) {
564 continue;
565 }
566
567 /* Or internal domains (this should not be possible....) */
568 if (child->domain->internal) {
569 continue;
570 }
571
572 /* Each winbindd child should only process requests for one domain - make sure
573 we only set it online / offline for that domain. */
574
575 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
576 (unsigned int)child->pid, child->domain->name ));
577
578 message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_ONLINE, child->domain->name,
579 strlen(child->domain->name)+1, False);
580 }
581 }
582
583 /* Forward the online/offline messages to our children. */
584 void winbind_msg_onlinestatus(int msg_type, struct process_id src,
585 void *buf, size_t len, void *private_data)
586 {
587 struct winbindd_child *child;
588
589 DEBUG(10,("winbind_msg_onlinestatus: got onlinestatus message.\n"));
590
591 for (child = children; child != NULL; child = child->next) {
592 if (child->domain && child->domain->primary) {
593 DEBUG(10,("winbind_msg_onlinestatus: "
594 "sending message to pid %u of primary domain.\n",
595 (unsigned int)child->pid));
596 message_send_pid(pid_to_procid(child->pid),
597 MSG_WINBIND_ONLINESTATUS, buf, len, False);
598 break;
599 }
600 }
601 }
602
603
604 static void account_lockout_policy_handler(struct event_context *ctx,
605 struct timed_event *te,
606 const struct timeval *now,
607 void *private_data)
608 {
609 struct winbindd_child *child =
610 (struct winbindd_child *)private_data;
611 TALLOC_CTX *mem_ctx = NULL;
612 struct winbindd_methods *methods;
613 SAM_UNK_INFO_12 lockout_policy;
614 NTSTATUS result;
615
616 DEBUG(10,("account_lockout_policy_handler called\n"));
617
618 if (child->lockout_policy_event) {
619 TALLOC_FREE(child->lockout_policy_event);
620 }
621
622 methods = child->domain->methods;
623
624 mem_ctx = talloc_init("account_lockout_policy_handler ctx");
625 if (!mem_ctx) {
626 result = NT_STATUS_NO_MEMORY;
627 } else {
628 result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
629 }
630
631 talloc_destroy(mem_ctx);
632
633 if (!NT_STATUS_IS_OK(result)) {
634 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
635 nt_errstr(result)));
636 }
637
638 child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
639 timeval_current_ofs(3600, 0),
640 "account_lockout_policy_handler",
641 account_lockout_policy_handler,
642 child);
643 }
644
645 /* Deal with a request to go offline. */
646
647 static void child_msg_offline(int msg_type, struct process_id src,
648 void *buf, size_t len, void *private_data)
649 {
650 struct winbindd_domain *domain;
651 const char *domainname = (const char *)buf;
652
653 if (buf == NULL || len == 0) {
654 return;
655 }
656
657 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
658
659 if (!lp_winbind_offline_logon()) {
660 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
661 return;
662 }
663
664 /* Set our global state as offline. */
665 if (!set_global_winbindd_state_offline()) {
666 DEBUG(10,("child_msg_offline: offline request failed.\n"));
667 return;
668 }
669
670 /* Mark the requested domain offline. */
671
672 for (domain = domain_list(); domain; domain = domain->next) {
673 if (domain->internal) {
674 continue;
675 }
676 if (strequal(domain->name, domainname)) {
677 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
678 set_domain_offline(domain);
679 }
680 }
681 }
682
683 /* Deal with a request to go online. */
684
685 static void child_msg_online(int msg_type, struct process_id src,
686 void *buf, size_t len, void *private_data)
687 {
688 struct winbindd_domain *domain;
689 const char *domainname = (const char *)buf;
690
691 if (buf == NULL || len == 0) {
692 return;
693 }
694
695 DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
696
697 if (!lp_winbind_offline_logon()) {
698 DEBUG(10,("child_msg_online: rejecting online message.\n"));
699 return;
700 }
701
702 /* Set our global state as online. */
703 set_global_winbindd_state_online();
704
705 /* Try and mark everything online - delete any negative cache entries
706 to force a reconnect now. */
707
708 for (domain = domain_list(); domain; domain = domain->next) {
709 if (domain->internal) {
710 continue;
711 }
712 if (strequal(domain->name, domainname)) {
713 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
714 winbindd_flush_negative_conn_cache(domain);
715 set_domain_online_request(domain);
716 }
717 }
718 }
719
720 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
721 {
722 struct winbindd_domain *domain;
723 char *buf = NULL;
724
725 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
726 get_global_winbindd_state_offline() ?
727 "Offline":"Online")) == NULL) {
728 return NULL;
729 }
730
731 for (domain = domain_list(); domain; domain = domain->next) {
732 if ((buf = talloc_asprintf_append(buf, "%s:%s ",
733 domain->name,
734 domain->online ?
735 "Online":"Offline")) == NULL) {
736 return NULL;
737 }
738 }
739
740 buf = talloc_asprintf_append(buf, "\n");
741
742 DEBUG(5,("collect_onlinestatus: %s", buf));
743
744 return buf;
745 }
746
747 static void child_msg_onlinestatus(int msg_type, struct process_id src,
748 void *buf, size_t len, void *private_data)
749 {
750 TALLOC_CTX *mem_ctx;
751 const char *message;
752 struct process_id *sender;
753
754 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
755
756 if (!buf) {
757 return;
758 }
759
760 sender = (struct process_id *)buf;
761
762 mem_ctx = talloc_init("winbind_msg_onlinestatus");
763 if (mem_ctx == NULL) {
764 return;
765 }
766
767 message = collect_onlinestatus(mem_ctx);
768 if (message == NULL) {
769 talloc_destroy(mem_ctx);
770 return;
771 }
772
773 message_send_pid(*sender, MSG_WINBIND_ONLINESTATUS,
774 message, strlen(message) + 1, True);
775
776 talloc_destroy(mem_ctx);
777 }
778
779 static BOOL fork_domain_child(struct winbindd_child *child)
780 {
781 int fdpair[2];
782 struct winbindd_cli_state state;
783 struct winbindd_domain *domain;
784
785 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
786 DEBUG(0, ("Could not open child pipe: %s\n",
787 strerror(errno)));
788 return False;
789 }
790
791 ZERO_STRUCT(state);
792 state.pid = sys_getpid();
793
794 /* Stop zombies */
795 CatchChild();
796
797 /* Ensure we don't process messages whilst we're
798 changing the disposition for the child. */
799 message_block();
800
801 child->pid = sys_fork();
802
803 if (child->pid == -1) {
804 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
805 message_unblock();
806 return False;
807 }
808
809 if (child->pid != 0) {
810 /* Parent */
811 close(fdpair[0]);
812 child->next = child->prev = NULL;
813 DLIST_ADD(children, child);
814 child->event.fd = fdpair[1];
815 child->event.flags = 0;
816 child->requests = NULL;
817 add_fd_event(&child->event);
818 /* We're ok with online/offline messages now. */
819 message_unblock();
820 return True;
821 }
822
823 /* Child */
824
825 state.sock = fdpair[0];
826 close(fdpair[1]);
827
828 /* tdb needs special fork handling */
829 if (tdb_reopen_all(1) == -1) {
830 DEBUG(0,("tdb_reopen_all failed.\n"));
831 _exit(0);
832 }
833
834 close_conns_after_fork();
835
836 if (!override_logfile) {
837 lp_set_logfile(child->logfilename);
838 reopen_logs();
839 }
840
841 /* Don't handle the same messages as our parent. */
842 message_deregister(MSG_SMB_CONF_UPDATED);
843 message_deregister(MSG_SHUTDOWN);
844 message_deregister(MSG_WINBIND_OFFLINE);
845 message_deregister(MSG_WINBIND_ONLINE);
846 message_deregister(MSG_WINBIND_ONLINESTATUS);
847
848 /* The child is ok with online/offline messages now. */
849 message_unblock();
850
851 /* Handle online/offline messages. */
852 message_register(MSG_WINBIND_OFFLINE, child_msg_offline, NULL);
853 message_register(MSG_WINBIND_ONLINE, child_msg_online, NULL);
854 message_register(MSG_WINBIND_ONLINESTATUS, child_msg_onlinestatus,
855 NULL);
856
857 if ( child->domain ) {
858 child->domain->startup = True;
859 child->domain->startup_time = time(NULL);
860 }
861
862 /* Ensure we have no pending check_online events other
863 than one for this domain. */
864
865 for (domain = domain_list(); domain; domain = domain->next) {
866 if (domain != child->domain) {
867 if (domain->check_online_event) {
868 TALLOC_FREE(domain->check_online_event);
869 }
870 }
871 }
872
873 /* Ensure we're not handling an event inherited from
874 our parent. */
875
876 cancel_named_event(winbind_event_context(),
877 "krb5_ticket_refresh_handler");
878
879 /* We might be in the idmap child...*/
880 if (child->domain && !(child->domain->internal) &&
881 lp_winbind_offline_logon()) {
882
883 set_domain_online_request(child->domain);
884
885 child->lockout_policy_event = event_add_timed(
886 winbind_event_context(), NULL, timeval_zero(),
887 "account_lockout_policy_handler",
888 account_lockout_policy_handler,
889 child);
890 }
891
892 while (1) {
893
894 int ret;
895 fd_set read_fds;
896 struct timeval t;
897 struct timeval *tp;
898 struct timeval now;
899
900 /* free up any talloc memory */
901 lp_TALLOC_FREE();
902 main_loop_TALLOC_FREE();
903
904 run_events(winbind_event_context(), 0, NULL, NULL);
905
906 GetTimeOfDay(&now);
907
908 if (child->domain && child->domain->startup &&
909 (now.tv_sec > child->domain->startup_time + 30)) {
910 /* No longer in "startup" mode. */
911 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
912 child->domain->name ));
913 child->domain->startup = False;
914 }
915
916 tp = get_timed_events_timeout(winbind_event_context(), &t);
917 if (tp) {
918 DEBUG(11,("select will use timeout of %u.%u seconds\n",
919 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
920 }
921
922 /* Handle messages */
923
924 message_dispatch();
925
926 FD_ZERO(&read_fds);
927 FD_SET(state.sock, &read_fds);
928
929 ret = sys_select(state.sock + 1, &read_fds, NULL, NULL, tp);
930
931 if (ret == 0) {
932 DEBUG(11,("nothing is ready yet, continue\n"));
933 continue;
934 }
935
936 if (ret == -1 && errno == EINTR) {
937 /* We got a signal - continue. */
938 continue;
939 }
940
941 if (ret == -1 && errno != EINTR) {
942 DEBUG(0,("select error occured\n"));
943 perror("select");
944 return False;
945 }
946
947 /* fetch a request from the main daemon */
948 child_read_request(&state);
949
950 if (state.finished) {
951 /* we lost contact with our parent */
952 exit(0);
953 }
954
955 DEBUG(4,("child daemon request %d\n", (int)state.request.cmd));
956
957 ZERO_STRUCT(state.response);
958 state.request.null_term = '\0';
959 child_process_request(child->domain, &state);
960
961 SAFE_FREE(state.request.extra_data.data);
962
963 cache_store_response(sys_getpid(), &state.response);
964
965 SAFE_FREE(state.response.extra_data.data);
966
967 /* We just send the result code back, the result
968 * structure needs to be fetched via the
969 * winbindd_cache. Hmm. That needs fixing... */
970
971 if (write_data(state.sock,
972 (const char *)&state.response.result,
973 sizeof(state.response.result)) !=
974 sizeof(state.response.result)) {
975 DEBUG(0, ("Could not write result\n"));
976 exit(1);
977 }
978 }
979 }
Samba GIT mirror