2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2002
7 Copyright (C) Volker Lendecke 2004,2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * We fork a child per domain to be able to act non-blocking in the main
25 * winbind daemon. A domain controller thousands of miles away being being
26 * slow replying with a 10.000 user list should not hold up netlogon calls
27 * that can be handled locally.
32 #include "../../nsswitch/libwbclient/wbc_async.h"
33 #include "../libcli/auth/libcli_auth.h"
36 #define DBGC_CLASS DBGC_WINBIND
38 extern bool override_logfile;
39 extern struct winbindd_methods cache_methods;
41 /* Read some data from a client connection */
43 static NTSTATUS child_read_request(struct winbindd_cli_state *state)
49 status = read_data(state->sock, (char *)state->request,
50 sizeof(*state->request));
52 if (!NT_STATUS_IS_OK(status)) {
53 DEBUG(3, ("child_read_request: read_data failed: %s\n",
58 if (state->request->extra_len == 0) {
59 state->request->extra_data.data = NULL;
63 DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request->extra_len));
65 state->request->extra_data.data =
66 SMB_MALLOC_ARRAY(char, state->request->extra_len + 1);
68 if (state->request->extra_data.data == NULL) {
69 DEBUG(0, ("malloc failed\n"));
70 return NT_STATUS_NO_MEMORY;
73 /* Ensure null termination */
74 state->request->extra_data.data[state->request->extra_len] = '\0';
76 status= read_data(state->sock, state->request->extra_data.data,
77 state->request->extra_len);
79 if (!NT_STATUS_IS_OK(status)) {
80 DEBUG(0, ("Could not read extra data: %s\n",
87 * Do winbind child async request. This is not simply wb_simple_trans. We have
88 * to do the queueing ourselves because while a request is queued, the child
89 * might have crashed, and we have to re-fork it in the _trigger function.
92 struct wb_child_request_state {
93 struct tevent_context *ev;
94 struct winbindd_child *child;
95 struct winbindd_request *request;
96 struct winbindd_response *response;
99 static bool fork_domain_child(struct winbindd_child *child);
101 static void wb_child_request_trigger(struct tevent_req *req,
103 static void wb_child_request_done(struct tevent_req *subreq);
105 struct tevent_req *wb_child_request_send(TALLOC_CTX *mem_ctx,
106 struct tevent_context *ev,
107 struct winbindd_child *child,
108 struct winbindd_request *request)
110 struct tevent_req *req;
111 struct wb_child_request_state *state;
113 req = tevent_req_create(mem_ctx, &state,
114 struct wb_child_request_state);
120 state->child = child;
121 state->request = request;
123 if (!tevent_queue_add(child->queue, ev, req,
124 wb_child_request_trigger, NULL)) {
125 tevent_req_nomem(NULL, req);
126 return tevent_req_post(req, ev);
131 static void wb_child_request_trigger(struct tevent_req *req,
134 struct wb_child_request_state *state = tevent_req_data(
135 req, struct wb_child_request_state);
136 struct tevent_req *subreq;
138 if ((state->child->pid == 0) && (!fork_domain_child(state->child))) {
139 tevent_req_error(req, errno);
143 subreq = wb_simple_trans_send(state, winbind_event_context(), NULL,
144 state->child->sock, state->request);
145 if (tevent_req_nomem(subreq, req)) {
148 tevent_req_set_callback(subreq, wb_child_request_done, req);
150 if (!tevent_req_set_endtime(req, state->ev,
151 timeval_current_ofs(300, 0))) {
152 tevent_req_nomem(NULL, req);
157 static void wb_child_request_done(struct tevent_req *subreq)
159 struct tevent_req *req = tevent_req_callback_data(
160 subreq, struct tevent_req);
161 struct wb_child_request_state *state = tevent_req_data(
162 req, struct wb_child_request_state);
165 ret = wb_simple_trans_recv(subreq, state, &state->response, &err);
168 tevent_req_error(req, err);
171 tevent_req_done(req);
174 int wb_child_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
175 struct winbindd_response **presponse, int *err)
177 struct wb_child_request_state *state = tevent_req_data(
178 req, struct wb_child_request_state);
180 if (tevent_req_is_unix_error(req, err)) {
183 *presponse = talloc_move(mem_ctx, &state->response);
187 struct wb_domain_request_state {
188 struct tevent_context *ev;
189 struct winbindd_domain *domain;
190 struct winbindd_request *request;
191 struct winbindd_request *init_req;
192 struct winbindd_response *response;
195 static void wb_domain_request_gotdc(struct tevent_req *subreq);
196 static void wb_domain_request_initialized(struct tevent_req *subreq);
197 static void wb_domain_request_done(struct tevent_req *subreq);
199 struct tevent_req *wb_domain_request_send(TALLOC_CTX *mem_ctx,
200 struct tevent_context *ev,
201 struct winbindd_domain *domain,
202 struct winbindd_request *request)
204 struct tevent_req *req, *subreq;
205 struct wb_domain_request_state *state;
207 req = tevent_req_create(mem_ctx, &state,
208 struct wb_domain_request_state);
213 if (domain->initialized) {
214 subreq = wb_child_request_send(state, ev, &domain->child,
216 if (tevent_req_nomem(subreq, req)) {
217 return tevent_req_post(req, ev);
219 tevent_req_set_callback(subreq, wb_domain_request_done, req);
223 state->domain = domain;
225 state->request = request;
227 state->init_req = talloc_zero(state, struct winbindd_request);
228 if (tevent_req_nomem(state->init_req, req)) {
229 return tevent_req_post(req, ev);
232 if (IS_DC || domain->primary || domain->internal) {
233 /* The primary domain has to find the DC name itself */
234 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
235 fstrcpy(state->init_req->domain_name, domain->name);
236 state->init_req->data.init_conn.is_primary =
237 domain->primary ? true : false;
238 fstrcpy(state->init_req->data.init_conn.dcname, "");
240 subreq = wb_child_request_send(state, ev, &domain->child,
242 if (tevent_req_nomem(subreq, req)) {
243 return tevent_req_post(req, ev);
245 tevent_req_set_callback(subreq, wb_domain_request_initialized,
251 * Ask our DC for a DC name
253 domain = find_our_domain();
255 /* This is *not* the primary domain, let's ask our DC about a DC
258 state->init_req->cmd = WINBINDD_GETDCNAME;
259 fstrcpy(state->init_req->domain_name, domain->name);
261 subreq = wb_child_request_send(state, ev, &domain->child, request);
262 if (tevent_req_nomem(subreq, req)) {
263 return tevent_req_post(req, ev);
265 tevent_req_set_callback(subreq, wb_domain_request_gotdc, req);
269 static void wb_domain_request_gotdc(struct tevent_req *subreq)
271 struct tevent_req *req = tevent_req_callback_data(
272 subreq, struct tevent_req);
273 struct wb_domain_request_state *state = tevent_req_data(
274 req, struct wb_domain_request_state);
275 struct winbindd_response *response;
278 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
281 tevent_req_error(req, err);
284 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
285 fstrcpy(state->init_req->domain_name, state->domain->name);
286 state->init_req->data.init_conn.is_primary = False;
287 fstrcpy(state->init_req->data.init_conn.dcname,
288 response->data.dc_name);
290 TALLOC_FREE(response);
292 subreq = wb_child_request_send(state, state->ev, &state->domain->child,
294 if (tevent_req_nomem(subreq, req)) {
297 tevent_req_set_callback(subreq, wb_domain_request_initialized, req);
300 static void wb_domain_request_initialized(struct tevent_req *subreq)
302 struct tevent_req *req = tevent_req_callback_data(
303 subreq, struct tevent_req);
304 struct wb_domain_request_state *state = tevent_req_data(
305 req, struct wb_domain_request_state);
306 struct winbindd_response *response;
309 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
312 tevent_req_error(req, err);
316 if (!string_to_sid(&state->domain->sid,
317 response->data.domain_info.sid)) {
318 DEBUG(1,("init_child_recv: Could not convert sid %s "
319 "from string\n", response->data.domain_info.sid));
320 tevent_req_error(req, EINVAL);
323 fstrcpy(state->domain->name, response->data.domain_info.name);
324 fstrcpy(state->domain->alt_name, response->data.domain_info.alt_name);
325 state->domain->native_mode = response->data.domain_info.native_mode;
326 state->domain->active_directory =
327 response->data.domain_info.active_directory;
328 state->domain->initialized = true;
330 TALLOC_FREE(response);
332 subreq = wb_child_request_send(state, state->ev, &state->domain->child,
334 if (tevent_req_nomem(subreq, req)) {
337 tevent_req_set_callback(subreq, wb_domain_request_done, req);
340 static void wb_domain_request_done(struct tevent_req *subreq)
342 struct tevent_req *req = tevent_req_callback_data(
343 subreq, struct tevent_req);
344 struct wb_domain_request_state *state = tevent_req_data(
345 req, struct wb_domain_request_state);
348 ret = wb_child_request_recv(subreq, talloc_tos(), &state->response,
352 tevent_req_error(req, err);
355 tevent_req_done(req);
358 int wb_domain_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
359 struct winbindd_response **presponse, int *err)
361 struct wb_domain_request_state *state = tevent_req_data(
362 req, struct wb_domain_request_state);
364 if (tevent_req_is_unix_error(req, err)) {
367 *presponse = talloc_move(mem_ctx, &state->response);
372 * Machinery for async requests sent to children. You set up a
373 * winbindd_request, select a child to query, and issue a async_request
374 * call. When the request is completed, the callback function you specified is
375 * called back with the private pointer you gave to async_request.
378 struct winbindd_async_request {
379 struct winbindd_async_request *next, *prev;
381 struct winbindd_child *child;
382 struct winbindd_response *response;
383 void (*continuation)(void *private_data, bool success);
384 struct timed_event *reply_timeout_event;
385 pid_t child_pid; /* pid of the child we're waiting on. Used to detect
386 a restart of the child (child->pid != child_pid). */
390 static void async_request_done(struct tevent_req *req);
392 void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
393 struct winbindd_request *request,
394 struct winbindd_response *response,
395 void (*continuation)(void *private_data, bool success),
398 struct winbindd_async_request *state;
399 struct tevent_req *req;
401 DEBUG(10, ("Sending request to child pid %d (domain=%s)\n",
403 (child->domain != NULL) ? child->domain->name : "''"));
405 state = talloc(mem_ctx, struct winbindd_async_request);
407 DEBUG(0, ("talloc failed\n"));
408 continuation(private_data, False);
412 state->mem_ctx = mem_ctx;
413 state->child = child;
414 state->reply_timeout_event = NULL;
415 state->response = response;
416 state->continuation = continuation;
417 state->private_data = private_data;
419 request->pid = child->pid;
421 req = wb_child_request_send(state, winbind_event_context(),
424 DEBUG(0, ("wb_child_request_send failed\n"));
425 continuation(private_data, false);
428 tevent_req_set_callback(req, async_request_done, state);
431 static void async_request_done(struct tevent_req *req)
433 struct winbindd_async_request *state = tevent_req_callback_data(
434 req, struct winbindd_async_request);
435 struct winbindd_response *response;
438 ret = wb_child_request_recv(req, state, &response, &err);
441 DEBUG(2, ("wb_child_request_recv failed: %s\n",
443 state->continuation(state->private_data, false);
446 *state->response = *response;
447 state->continuation(state->private_data, true);
450 struct domain_request_state {
451 struct winbindd_domain *domain;
452 struct winbindd_request *request;
453 struct winbindd_response *response;
454 void (*continuation)(void *private_data_data, bool success);
455 void *private_data_data;
458 static void async_domain_request_done(struct tevent_req *req);
460 void async_domain_request(TALLOC_CTX *mem_ctx,
461 struct winbindd_domain *domain,
462 struct winbindd_request *request,
463 struct winbindd_response *response,
464 void (*continuation)(void *private_data_data, bool success),
465 void *private_data_data)
467 struct tevent_req *subreq;
468 struct domain_request_state *state;
470 state = TALLOC_P(mem_ctx, struct domain_request_state);
472 DEBUG(0, ("talloc failed\n"));
473 continuation(private_data_data, False);
477 state->domain = domain;
478 state->request = request;
479 state->response = response;
480 state->continuation = continuation;
481 state->private_data_data = private_data_data;
483 subreq = wb_domain_request_send(state, winbind_event_context(),
485 if (subreq == NULL) {
486 DEBUG(5, ("wb_domain_request_send failed\n"));
487 continuation(private_data_data, false);
490 tevent_req_set_callback(subreq, async_domain_request_done, state);
493 static void async_domain_request_done(struct tevent_req *req)
495 struct domain_request_state *state = tevent_req_callback_data(
496 req, struct domain_request_state);
497 struct winbindd_response *response;
500 ret = wb_domain_request_recv(req, state, &response, &err);
503 DEBUG(5, ("wb_domain_request returned %s\n", strerror(err)));
504 state->continuation(state->private_data_data, false);
507 *(state->response) = *response;
508 state->continuation(state->private_data_data, true);
511 static void recvfrom_child(void *private_data_data, bool success)
513 struct winbindd_cli_state *state =
514 talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
515 enum winbindd_result result = state->response->result;
517 /* This is an optimization: The child has written directly to the
518 * response buffer. The request itself is still in pending state,
519 * state that in the result code. */
521 state->response->result = WINBINDD_PENDING;
523 if ((!success) || (result != WINBINDD_OK)) {
524 request_error(state);
531 void sendto_child(struct winbindd_cli_state *state,
532 struct winbindd_child *child)
534 async_request(state->mem_ctx, child, state->request,
535 state->response, recvfrom_child, state);
538 void sendto_domain(struct winbindd_cli_state *state,
539 struct winbindd_domain *domain)
541 async_domain_request(state->mem_ctx, domain,
542 state->request, state->response,
543 recvfrom_child, state);
546 static void child_process_request(struct winbindd_child *child,
547 struct winbindd_cli_state *state)
549 struct winbindd_domain *domain = child->domain;
550 const struct winbindd_child_dispatch_table *table = child->table;
552 /* Free response data - we may be interrupted and receive another
553 command before being able to send this data off. */
555 state->response->result = WINBINDD_ERROR;
556 state->response->length = sizeof(struct winbindd_response);
558 /* as all requests in the child are sync, we can use talloc_tos() */
559 state->mem_ctx = talloc_tos();
561 /* Process command */
563 for (; table->name; table++) {
564 if (state->request->cmd == table->struct_cmd) {
565 DEBUG(10,("child_process_request: request fn %s\n",
567 state->response->result = table->struct_fn(domain, state);
572 DEBUG(1 ,("child_process_request: unknown request fn number %d\n",
573 (int)state->request->cmd));
574 state->response->result = WINBINDD_ERROR;
577 void setup_child(struct winbindd_domain *domain, struct winbindd_child *child,
578 const struct winbindd_child_dispatch_table *table,
579 const char *logprefix,
582 if (logprefix && logname) {
583 if (asprintf(&child->logfilename, "%s/%s-%s",
584 get_dyn_LOGFILEBASE(), logprefix, logname) < 0) {
585 smb_panic("Internal error: asprintf failed");
588 smb_panic("Internal error: logprefix == NULL && "
592 child->domain = NULL;
593 child->table = table;
594 child->queue = tevent_queue_create(NULL, "winbind_child");
595 SMB_ASSERT(child->queue != NULL);
596 child->rpccli = wbint_rpccli_create(NULL, domain, child);
597 SMB_ASSERT(child->rpccli != NULL);
600 struct winbindd_child *children = NULL;
602 void winbind_child_died(pid_t pid)
604 struct winbindd_child *child;
606 for (child = children; child != NULL; child = child->next) {
607 if (child->pid == pid) {
613 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
617 /* This will be re-added in fork_domain_child() */
619 DLIST_REMOVE(children, child);
626 /* Ensure any negative cache entries with the netbios or realm names are removed. */
628 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
630 flush_negative_conn_cache_for_domain(domain->name);
631 if (*domain->alt_name) {
632 flush_negative_conn_cache_for_domain(domain->alt_name);
637 * Parent winbindd process sets its own debug level first and then
638 * sends a message to all the winbindd children to adjust their debug
639 * level to that of parents.
642 void winbind_msg_debug(struct messaging_context *msg_ctx,
645 struct server_id server_id,
648 struct winbindd_child *child;
650 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
652 debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
654 for (child = children; child != NULL; child = child->next) {
656 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
657 (unsigned int)child->pid));
659 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
662 strlen((char *) data->data) + 1);
666 /* Set our domains as offline and forward the offline message to our children. */
668 void winbind_msg_offline(struct messaging_context *msg_ctx,
671 struct server_id server_id,
674 struct winbindd_child *child;
675 struct winbindd_domain *domain;
677 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
679 if (!lp_winbind_offline_logon()) {
680 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
684 /* Set our global state as offline. */
685 if (!set_global_winbindd_state_offline()) {
686 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
690 /* Set all our domains as offline. */
691 for (domain = domain_list(); domain; domain = domain->next) {
692 if (domain->internal) {
695 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
696 set_domain_offline(domain);
699 for (child = children; child != NULL; child = child->next) {
700 /* Don't send message to internal childs. We've already
702 if (!child->domain || winbindd_internal_child(child)) {
706 /* Or internal domains (this should not be possible....) */
707 if (child->domain->internal) {
711 /* Each winbindd child should only process requests for one domain - make sure
712 we only set it online / offline for that domain. */
714 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
715 (unsigned int)child->pid, domain->name ));
717 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
719 (uint8 *)child->domain->name,
720 strlen(child->domain->name)+1);
724 /* Set our domains as online and forward the online message to our children. */
726 void winbind_msg_online(struct messaging_context *msg_ctx,
729 struct server_id server_id,
732 struct winbindd_child *child;
733 struct winbindd_domain *domain;
735 DEBUG(10,("winbind_msg_online: got online message.\n"));
737 if (!lp_winbind_offline_logon()) {
738 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
742 /* Set our global state as online. */
743 set_global_winbindd_state_online();
745 smb_nscd_flush_user_cache();
746 smb_nscd_flush_group_cache();
748 /* Set all our domains as online. */
749 for (domain = domain_list(); domain; domain = domain->next) {
750 if (domain->internal) {
753 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
755 winbindd_flush_negative_conn_cache(domain);
756 set_domain_online_request(domain);
758 /* Send an online message to the idmap child when our
759 primary domain comes back online */
761 if ( domain->primary ) {
762 struct winbindd_child *idmap = idmap_child();
764 if ( idmap->pid != 0 ) {
765 messaging_send_buf(msg_ctx,
766 pid_to_procid(idmap->pid),
768 (uint8 *)domain->name,
769 strlen(domain->name)+1);
774 for (child = children; child != NULL; child = child->next) {
775 /* Don't send message to internal childs. */
776 if (!child->domain || winbindd_internal_child(child)) {
780 /* Or internal domains (this should not be possible....) */
781 if (child->domain->internal) {
785 /* Each winbindd child should only process requests for one domain - make sure
786 we only set it online / offline for that domain. */
788 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
789 (unsigned int)child->pid, child->domain->name ));
791 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
793 (uint8 *)child->domain->name,
794 strlen(child->domain->name)+1);
798 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
800 struct winbindd_domain *domain;
803 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
804 get_global_winbindd_state_offline() ?
805 "Offline":"Online")) == NULL) {
809 for (domain = domain_list(); domain; domain = domain->next) {
810 if ((buf = talloc_asprintf_append_buffer(buf, "%s:%s ",
813 "Online":"Offline")) == NULL) {
818 buf = talloc_asprintf_append_buffer(buf, "\n");
820 DEBUG(5,("collect_onlinestatus: %s", buf));
825 void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
828 struct server_id server_id,
833 struct server_id *sender;
835 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
841 sender = (struct server_id *)data->data;
843 mem_ctx = talloc_init("winbind_msg_onlinestatus");
844 if (mem_ctx == NULL) {
848 message = collect_onlinestatus(mem_ctx);
849 if (message == NULL) {
850 talloc_destroy(mem_ctx);
854 messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
855 (uint8 *)message, strlen(message) + 1);
857 talloc_destroy(mem_ctx);
860 void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
863 struct server_id server_id,
866 struct winbindd_child *child;
868 DEBUG(10,("winbind_msg_dump_event_list received\n"));
870 dump_event_list(winbind_event_context());
872 for (child = children; child != NULL; child = child->next) {
874 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
875 (unsigned int)child->pid));
877 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
884 void winbind_msg_dump_domain_list(struct messaging_context *msg_ctx,
887 struct server_id server_id,
891 const char *message = NULL;
892 struct server_id *sender = NULL;
893 const char *domain = NULL;
896 struct winbindd_domain *dom = NULL;
898 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
900 if (!data || !data->data) {
904 if (data->length < sizeof(struct server_id)) {
908 mem_ctx = talloc_init("winbind_msg_dump_domain_list");
913 sender = (struct server_id *)data->data;
914 if (data->length > sizeof(struct server_id)) {
915 domain = (const char *)data->data+sizeof(struct server_id);
920 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
923 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain,
924 find_domain_from_name_noinit(domain));
926 talloc_destroy(mem_ctx);
930 messaging_send_buf(msg_ctx, *sender,
931 MSG_WINBIND_DUMP_DOMAIN_LIST,
932 (uint8_t *)message, strlen(message) + 1);
934 talloc_destroy(mem_ctx);
939 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
941 for (dom = domain_list(); dom; dom=dom->next) {
942 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain, dom);
944 talloc_destroy(mem_ctx);
948 s = talloc_asprintf_append(s, "%s\n", message);
950 talloc_destroy(mem_ctx);
955 status = messaging_send_buf(msg_ctx, *sender,
956 MSG_WINBIND_DUMP_DOMAIN_LIST,
957 (uint8_t *)s, strlen(s) + 1);
958 if (!NT_STATUS_IS_OK(status)) {
959 DEBUG(0,("failed to send message: %s\n",
963 talloc_destroy(mem_ctx);
966 static void account_lockout_policy_handler(struct event_context *ctx,
967 struct timed_event *te,
971 struct winbindd_child *child =
972 (struct winbindd_child *)private_data;
973 TALLOC_CTX *mem_ctx = NULL;
974 struct winbindd_methods *methods;
975 struct samr_DomInfo12 lockout_policy;
978 DEBUG(10,("account_lockout_policy_handler called\n"));
980 TALLOC_FREE(child->lockout_policy_event);
982 if ( !winbindd_can_contact_domain( child->domain ) ) {
983 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
984 "do not have an incoming trust to domain %s\n",
985 child->domain->name));
990 methods = child->domain->methods;
992 mem_ctx = talloc_init("account_lockout_policy_handler ctx");
994 result = NT_STATUS_NO_MEMORY;
996 result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
998 TALLOC_FREE(mem_ctx);
1000 if (!NT_STATUS_IS_OK(result)) {
1001 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
1002 nt_errstr(result)));
1005 child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
1006 timeval_current_ofs(3600, 0),
1007 account_lockout_policy_handler,
1011 static time_t get_machine_password_timeout(void)
1013 /* until we have gpo support use lp setting */
1014 return lp_machine_password_timeout();
1017 static bool calculate_next_machine_pwd_change(const char *domain,
1020 time_t pass_last_set_time;
1025 pw = secrets_fetch_machine_password(domain,
1026 &pass_last_set_time,
1030 DEBUG(0,("cannot fetch own machine password ????"));
1036 timeout = get_machine_password_timeout();
1038 DEBUG(10,("machine password never expires\n"));
1042 if (time(NULL) < (pass_last_set_time + timeout)) {
1043 next_change = pass_last_set_time + timeout;
1044 DEBUG(10,("machine password still valid until: %s\n",
1045 http_timestring(talloc_tos(), next_change)));
1046 *t = timeval_set(next_change, 0);
1050 DEBUG(10,("machine password expired, needs immediate change\n"));
1052 *t = timeval_zero();
1057 static void machine_password_change_handler(struct event_context *ctx,
1058 struct timed_event *te,
1062 struct winbindd_child *child =
1063 (struct winbindd_child *)private_data;
1064 struct rpc_pipe_client *netlogon_pipe = NULL;
1066 struct timeval next_change;
1067 uint8_t old_trust_passwd_hash[16];
1068 uint8_t new_trust_passwd_hash[16];
1069 char *new_trust_passwd;
1070 uint32_t sec_channel_type = 0;
1072 DEBUG(10,("machine_password_change_handler called\n"));
1074 TALLOC_FREE(child->machine_password_change_event);
1076 if (!calculate_next_machine_pwd_change(child->domain->name,
1081 if (!winbindd_can_contact_domain(child->domain)) {
1082 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1083 "do not have an incoming trust to domain %s\n",
1084 child->domain->name));
1088 result = cm_connect_netlogon(child->domain, &netlogon_pipe);
1089 if (!NT_STATUS_IS_OK(result)) {
1090 DEBUG(10,("machine_password_change_handler: "
1091 "failed to connect netlogon pipe: %s\n",
1092 nt_errstr(result)));
1096 if (!secrets_fetch_trust_account_password(
1097 child->domain->name, old_trust_passwd_hash, NULL,
1098 &sec_channel_type)) {
1099 DEBUG(0, ("could not fetch domain secrets for domain %s!\n",
1100 child->domain->name));
1104 new_trust_passwd = generate_random_str(
1105 talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
1106 if (new_trust_passwd == NULL) {
1107 DEBUG(0, ("talloc_strdup failed\n"));
1111 E_md4hash(new_trust_passwd, new_trust_passwd_hash);
1113 result = rpccli_netlogon_set_trust_password(
1114 netlogon_pipe, talloc_tos(), old_trust_passwd_hash,
1115 new_trust_passwd, new_trust_passwd_hash, sec_channel_type,
1116 netlogon_pipe->auth_neg_flags);
1118 if (!NT_STATUS_IS_OK(result)) {
1119 DEBUG(10,("machine_password_change_handler: "
1120 "failed to change machine password: %s\n",
1121 nt_errstr(result)));
1123 * Don't try a second time, this will very likely also
1129 DEBUG(3,("machine_password_change_handler: Changed password at %s.\n",
1130 current_timestring(debug_ctx(), False)));
1132 child->machine_password_change_event = event_add_timed(winbind_event_context(), NULL,
1134 machine_password_change_handler,
1138 /* Deal with a request to go offline. */
1140 static void child_msg_offline(struct messaging_context *msg,
1143 struct server_id server_id,
1146 struct winbindd_domain *domain;
1147 struct winbindd_domain *primary_domain = NULL;
1148 const char *domainname = (const char *)data->data;
1150 if (data->data == NULL || data->length == 0) {
1154 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
1156 if (!lp_winbind_offline_logon()) {
1157 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1161 primary_domain = find_our_domain();
1163 /* Mark the requested domain offline. */
1165 for (domain = domain_list(); domain; domain = domain->next) {
1166 if (domain->internal) {
1169 if (strequal(domain->name, domainname)) {
1170 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
1171 set_domain_offline(domain);
1172 /* we are in the trusted domain, set the primary domain
1174 if (domain != primary_domain) {
1175 set_domain_offline(primary_domain);
1181 /* Deal with a request to go online. */
1183 static void child_msg_online(struct messaging_context *msg,
1186 struct server_id server_id,
1189 struct winbindd_domain *domain;
1190 struct winbindd_domain *primary_domain = NULL;
1191 const char *domainname = (const char *)data->data;
1193 if (data->data == NULL || data->length == 0) {
1197 DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
1199 if (!lp_winbind_offline_logon()) {
1200 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1204 primary_domain = find_our_domain();
1206 /* Set our global state as online. */
1207 set_global_winbindd_state_online();
1209 /* Try and mark everything online - delete any negative cache entries
1210 to force a reconnect now. */
1212 for (domain = domain_list(); domain; domain = domain->next) {
1213 if (domain->internal) {
1216 if (strequal(domain->name, domainname)) {
1217 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
1218 winbindd_flush_negative_conn_cache(domain);
1219 set_domain_online_request(domain);
1221 /* we can be in trusted domain, which will contact primary domain
1222 * we have to bring primary domain online in trusted domain process
1223 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1224 * --> contact_domain = find_our_domain()
1226 if (domain != primary_domain) {
1227 winbindd_flush_negative_conn_cache(primary_domain);
1228 set_domain_online_request(primary_domain);
1234 static void child_msg_dump_event_list(struct messaging_context *msg,
1237 struct server_id server_id,
1240 DEBUG(5,("child_msg_dump_event_list received\n"));
1242 dump_event_list(winbind_event_context());
1245 bool winbindd_reinit_after_fork(const char *logfilename)
1247 struct winbindd_domain *domain;
1248 struct winbindd_child *cl;
1250 if (!NT_STATUS_IS_OK(reinit_after_fork(winbind_messaging_context(),
1251 winbind_event_context(),
1253 DEBUG(0,("reinit_after_fork() failed\n"));
1257 close_conns_after_fork();
1259 if (!override_logfile && logfilename) {
1260 lp_set_logfile(logfilename);
1264 if (!winbindd_setup_sig_term_handler(false))
1266 if (!winbindd_setup_sig_hup_handler(override_logfile ? NULL :
1270 /* Don't handle the same messages as our parent. */
1271 messaging_deregister(winbind_messaging_context(),
1272 MSG_SMB_CONF_UPDATED, NULL);
1273 messaging_deregister(winbind_messaging_context(),
1274 MSG_SHUTDOWN, NULL);
1275 messaging_deregister(winbind_messaging_context(),
1276 MSG_WINBIND_OFFLINE, NULL);
1277 messaging_deregister(winbind_messaging_context(),
1278 MSG_WINBIND_ONLINE, NULL);
1279 messaging_deregister(winbind_messaging_context(),
1280 MSG_WINBIND_ONLINESTATUS, NULL);
1281 messaging_deregister(winbind_messaging_context(),
1282 MSG_DUMP_EVENT_LIST, NULL);
1283 messaging_deregister(winbind_messaging_context(),
1284 MSG_WINBIND_DUMP_DOMAIN_LIST, NULL);
1285 messaging_deregister(winbind_messaging_context(),
1288 /* We have destroyed all events in the winbindd_event_context
1289 * in reinit_after_fork(), so clean out all possible pending
1290 * event pointers. */
1292 /* Deal with check_online_events. */
1294 for (domain = domain_list(); domain; domain = domain->next) {
1295 TALLOC_FREE(domain->check_online_event);
1298 /* Ensure we're not handling a credential cache event inherited
1299 * from our parent. */
1301 ccache_remove_all_after_fork();
1303 /* Destroy all possible events in child list. */
1304 for (cl = children; cl != NULL; cl = cl->next) {
1305 TALLOC_FREE(cl->lockout_policy_event);
1306 TALLOC_FREE(cl->machine_password_change_event);
1308 /* Children should never be able to send
1309 * each other messages, all messages must
1310 * go through the parent.
1315 * This is a little tricky, children must not
1316 * send an MSG_WINBIND_ONLINE message to idmap_child().
1317 * If we are in a child of our primary domain or
1318 * in the process created by fork_child_dc_connect(),
1319 * and the primary domain cannot go online,
1320 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1321 * periodically to idmap_child().
1323 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1324 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1325 * ---> init_dc_connection() ---> cm_open_connection --->
1326 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1327 * idmap_child(). Disallow children sending messages
1328 * to each other, all messages must go through the parent.
1337 * In a child there will be only one domain, reference that here.
1339 static struct winbindd_domain *child_domain;
1341 struct winbindd_domain *wb_child_domain(void)
1343 return child_domain;
1346 static bool fork_domain_child(struct winbindd_child *child)
1349 struct winbindd_cli_state state;
1350 struct winbindd_request request;
1351 struct winbindd_response response;
1352 struct winbindd_domain *primary_domain = NULL;
1354 if (child->domain) {
1355 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1356 child->domain->name));
1358 DEBUG(10, ("fork_domain_child called without domain.\n"));
1360 child_domain = child->domain;
1362 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
1363 DEBUG(0, ("Could not open child pipe: %s\n",
1369 state.pid = sys_getpid();
1370 state.request = &request;
1371 state.response = &response;
1373 child->pid = sys_fork();
1375 if (child->pid == -1) {
1376 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
1380 if (child->pid != 0) {
1383 child->next = child->prev = NULL;
1384 DLIST_ADD(children, child);
1385 child->sock = fdpair[1];
1391 DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
1393 /* Stop zombies in children */
1396 state.sock = fdpair[0];
1399 if (!winbindd_reinit_after_fork(child->logfilename)) {
1403 /* Handle online/offline messages. */
1404 messaging_register(winbind_messaging_context(), NULL,
1405 MSG_WINBIND_OFFLINE, child_msg_offline);
1406 messaging_register(winbind_messaging_context(), NULL,
1407 MSG_WINBIND_ONLINE, child_msg_online);
1408 messaging_register(winbind_messaging_context(), NULL,
1409 MSG_DUMP_EVENT_LIST, child_msg_dump_event_list);
1410 messaging_register(winbind_messaging_context(), NULL,
1411 MSG_DEBUG, debug_message);
1413 primary_domain = find_our_domain();
1415 if (primary_domain == NULL) {
1416 smb_panic("no primary domain found");
1419 /* It doesn't matter if we allow cache login,
1420 * try to bring domain online after fork. */
1421 if ( child->domain ) {
1422 child->domain->startup = True;
1423 child->domain->startup_time = time(NULL);
1424 /* we can be in primary domain or in trusted domain
1425 * If we are in trusted domain, set the primary domain
1426 * in start-up mode */
1427 if (!(child->domain->internal)) {
1428 set_domain_online_request(child->domain);
1429 if (!(child->domain->primary)) {
1430 primary_domain->startup = True;
1431 primary_domain->startup_time = time(NULL);
1432 set_domain_online_request(primary_domain);
1438 * We are in idmap child, make sure that we set the
1439 * check_online_event to bring primary domain online.
1441 if (child == idmap_child()) {
1442 set_domain_online_request(primary_domain);
1445 /* We might be in the idmap child...*/
1446 if (child->domain && !(child->domain->internal) &&
1447 lp_winbind_offline_logon()) {
1449 set_domain_online_request(child->domain);
1451 if (primary_domain && (primary_domain != child->domain)) {
1452 /* We need to talk to the primary
1453 * domain as well as the trusted
1454 * domain inside a trusted domain
1457 * set_dc_type_and_flags_trustinfo()
1460 set_domain_online_request(primary_domain);
1463 child->lockout_policy_event = event_add_timed(
1464 winbind_event_context(), NULL, timeval_zero(),
1465 account_lockout_policy_handler,
1469 if (child->domain && child->domain->primary &&
1470 !USE_KERBEROS_KEYTAB &&
1471 lp_server_role() == ROLE_DOMAIN_MEMBER) {
1473 struct timeval next_change;
1475 if (calculate_next_machine_pwd_change(child->domain->name,
1477 child->machine_password_change_event = event_add_timed(
1478 winbind_event_context(), NULL, next_change,
1479 machine_password_change_handler,
1493 TALLOC_CTX *frame = talloc_stackframe();
1494 struct iovec iov[2];
1498 if (run_events(winbind_event_context(), 0, NULL, NULL)) {
1505 if (child->domain && child->domain->startup &&
1506 (now.tv_sec > child->domain->startup_time + 30)) {
1507 /* No longer in "startup" mode. */
1508 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1509 child->domain->name ));
1510 child->domain->startup = False;
1515 FD_SET(state.sock, &r_fds);
1518 event_add_to_select_args(winbind_event_context(), &now,
1519 &r_fds, &w_fds, &t, &maxfd);
1520 tp = get_timed_events_timeout(winbind_event_context(), &t);
1522 DEBUG(11,("select will use timeout of %u.%u seconds\n",
1523 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
1526 ret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, tp);
1528 if (run_events(winbind_event_context(), ret, &r_fds, &w_fds)) {
1529 /* We got a signal - continue. */
1535 DEBUG(11,("nothing is ready yet, continue\n"));
1540 if (ret == -1 && errno == EINTR) {
1541 /* We got a signal - continue. */
1546 if (ret == -1 && errno != EINTR) {
1547 DEBUG(0,("select error occured\n"));
1553 /* fetch a request from the main daemon */
1554 status = child_read_request(&state);
1556 if (!NT_STATUS_IS_OK(status)) {
1557 /* we lost contact with our parent */
1561 DEBUG(4,("child daemon request %d\n", (int)state.request->cmd));
1563 ZERO_STRUCTP(state.response);
1564 state.request->null_term = '\0';
1565 state.mem_ctx = frame;
1566 child_process_request(child, &state);
1568 DEBUG(4, ("Finished processing child request %d\n",
1569 (int)state.request->cmd));
1571 SAFE_FREE(state.request->extra_data.data);
1573 iov[0].iov_base = (void *)state.response;
1574 iov[0].iov_len = sizeof(struct winbindd_response);
1577 if (state.response->length > sizeof(struct winbindd_response)) {
1579 (void *)state.response->extra_data.data;
1580 iov[1].iov_len = state.response->length-iov[0].iov_len;
1584 DEBUG(10, ("Writing %d bytes to parent\n",
1585 (int)state.response->length));
1587 if (write_data_iov(state.sock, iov, iov_count) !=
1588 state.response->length) {
1589 DEBUG(0, ("Could not write result\n"));