2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2002
7 Copyright (C) Volker Lendecke 2004,2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * We fork a child per domain to be able to act non-blocking in the main
25 * winbind daemon. A domain controller thousands of miles away being being
26 * slow replying with a 10.000 user list should not hold up netlogon calls
27 * that can be handled locally.
32 #include "nsswitch/wb_reqtrans.h"
33 #include "librpc/gen_ndr/messaging.h"
35 #include "../lib/util/select.h"
36 #include "../libcli/security/security.h"
37 #include "system/select.h"
40 #define DBGC_CLASS DBGC_WINBIND
42 extern bool override_logfile;
43 extern struct winbindd_methods cache_methods;
45 /* Read some data from a client connection */
47 static NTSTATUS child_read_request(struct winbindd_cli_state *state)
53 status = read_data(state->sock, (char *)state->request,
54 sizeof(*state->request));
56 if (!NT_STATUS_IS_OK(status)) {
57 DEBUG(3, ("child_read_request: read_data failed: %s\n",
62 if (state->request->extra_len == 0) {
63 state->request->extra_data.data = NULL;
67 DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request->extra_len));
69 state->request->extra_data.data =
70 SMB_MALLOC_ARRAY(char, state->request->extra_len + 1);
72 if (state->request->extra_data.data == NULL) {
73 DEBUG(0, ("malloc failed\n"));
74 return NT_STATUS_NO_MEMORY;
77 /* Ensure null termination */
78 state->request->extra_data.data[state->request->extra_len] = '\0';
80 status= read_data(state->sock, state->request->extra_data.data,
81 state->request->extra_len);
83 if (!NT_STATUS_IS_OK(status)) {
84 DEBUG(0, ("Could not read extra data: %s\n",
91 * Do winbind child async request. This is not simply wb_simple_trans. We have
92 * to do the queueing ourselves because while a request is queued, the child
93 * might have crashed, and we have to re-fork it in the _trigger function.
96 struct wb_child_request_state {
97 struct tevent_context *ev;
98 struct winbindd_child *child;
99 struct winbindd_request *request;
100 struct winbindd_response *response;
103 static bool fork_domain_child(struct winbindd_child *child);
105 static void wb_child_request_trigger(struct tevent_req *req,
107 static void wb_child_request_done(struct tevent_req *subreq);
109 struct tevent_req *wb_child_request_send(TALLOC_CTX *mem_ctx,
110 struct tevent_context *ev,
111 struct winbindd_child *child,
112 struct winbindd_request *request)
114 struct tevent_req *req;
115 struct wb_child_request_state *state;
117 req = tevent_req_create(mem_ctx, &state,
118 struct wb_child_request_state);
124 state->child = child;
125 state->request = request;
127 if (!tevent_queue_add(child->queue, ev, req,
128 wb_child_request_trigger, NULL)) {
129 tevent_req_nomem(NULL, req);
130 return tevent_req_post(req, ev);
135 static void wb_child_request_trigger(struct tevent_req *req,
138 struct wb_child_request_state *state = tevent_req_data(
139 req, struct wb_child_request_state);
140 struct tevent_req *subreq;
142 if ((state->child->sock == -1) && (!fork_domain_child(state->child))) {
143 tevent_req_error(req, errno);
147 subreq = wb_simple_trans_send(state, winbind_event_context(), NULL,
148 state->child->sock, state->request);
149 if (tevent_req_nomem(subreq, req)) {
152 tevent_req_set_callback(subreq, wb_child_request_done, req);
154 if (!tevent_req_set_endtime(req, state->ev,
155 timeval_current_ofs(300, 0))) {
156 tevent_req_nomem(NULL, req);
161 static void wb_child_request_done(struct tevent_req *subreq)
163 struct tevent_req *req = tevent_req_callback_data(
164 subreq, struct tevent_req);
165 struct wb_child_request_state *state = tevent_req_data(
166 req, struct wb_child_request_state);
169 ret = wb_simple_trans_recv(subreq, state, &state->response, &err);
173 * The basic parent/child communication broke, close
176 close(state->child->sock);
177 state->child->sock = -1;
178 tevent_req_error(req, err);
181 tevent_req_done(req);
184 int wb_child_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
185 struct winbindd_response **presponse, int *err)
187 struct wb_child_request_state *state = tevent_req_data(
188 req, struct wb_child_request_state);
190 if (tevent_req_is_unix_error(req, err)) {
193 *presponse = talloc_move(mem_ctx, &state->response);
197 static bool winbindd_child_busy(struct winbindd_child *child)
199 return tevent_queue_length(child->queue) > 0;
202 static struct winbindd_child *find_idle_child(struct winbindd_domain *domain)
206 for (i=0; i<lp_winbind_max_domain_connections(); i++) {
207 if (!winbindd_child_busy(&domain->children[i])) {
208 return &domain->children[i];
215 struct winbindd_child *choose_domain_child(struct winbindd_domain *domain)
217 struct winbindd_child *result;
219 result = find_idle_child(domain);
220 if (result != NULL) {
223 return &domain->children[rand() % lp_winbind_max_domain_connections()];
226 struct dcerpc_binding_handle *dom_child_handle(struct winbindd_domain *domain)
228 struct winbindd_child *child;
230 child = choose_domain_child(domain);
231 return child->binding_handle;
234 struct wb_domain_request_state {
235 struct tevent_context *ev;
236 struct winbindd_domain *domain;
237 struct winbindd_child *child;
238 struct winbindd_request *request;
239 struct winbindd_request *init_req;
240 struct winbindd_response *response;
243 static void wb_domain_request_gotdc(struct tevent_req *subreq);
244 static void wb_domain_request_initialized(struct tevent_req *subreq);
245 static void wb_domain_request_done(struct tevent_req *subreq);
247 struct tevent_req *wb_domain_request_send(TALLOC_CTX *mem_ctx,
248 struct tevent_context *ev,
249 struct winbindd_domain *domain,
250 struct winbindd_request *request)
252 struct tevent_req *req, *subreq;
253 struct wb_domain_request_state *state;
255 req = tevent_req_create(mem_ctx, &state,
256 struct wb_domain_request_state);
261 state->child = choose_domain_child(domain);
263 if (domain->initialized) {
264 subreq = wb_child_request_send(state, ev, state->child,
266 if (tevent_req_nomem(subreq, req)) {
267 return tevent_req_post(req, ev);
269 tevent_req_set_callback(subreq, wb_domain_request_done, req);
273 state->domain = domain;
275 state->request = request;
277 state->init_req = talloc_zero(state, struct winbindd_request);
278 if (tevent_req_nomem(state->init_req, req)) {
279 return tevent_req_post(req, ev);
282 if (IS_DC || domain->primary || domain->internal) {
283 /* The primary domain has to find the DC name itself */
284 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
285 fstrcpy(state->init_req->domain_name, domain->name);
286 state->init_req->data.init_conn.is_primary = domain->primary;
287 fstrcpy(state->init_req->data.init_conn.dcname, "");
289 subreq = wb_child_request_send(state, ev, state->child,
291 if (tevent_req_nomem(subreq, req)) {
292 return tevent_req_post(req, ev);
294 tevent_req_set_callback(subreq, wb_domain_request_initialized,
300 * Ask our DC for a DC name
302 domain = find_our_domain();
304 /* This is *not* the primary domain, let's ask our DC about a DC
307 state->init_req->cmd = WINBINDD_GETDCNAME;
308 fstrcpy(state->init_req->domain_name, domain->name);
310 subreq = wb_child_request_send(state, ev, state->child, request);
311 if (tevent_req_nomem(subreq, req)) {
312 return tevent_req_post(req, ev);
314 tevent_req_set_callback(subreq, wb_domain_request_gotdc, req);
318 static void wb_domain_request_gotdc(struct tevent_req *subreq)
320 struct tevent_req *req = tevent_req_callback_data(
321 subreq, struct tevent_req);
322 struct wb_domain_request_state *state = tevent_req_data(
323 req, struct wb_domain_request_state);
324 struct winbindd_response *response;
327 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
330 tevent_req_error(req, err);
333 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
334 fstrcpy(state->init_req->domain_name, state->domain->name);
335 state->init_req->data.init_conn.is_primary = False;
336 fstrcpy(state->init_req->data.init_conn.dcname,
337 response->data.dc_name);
339 TALLOC_FREE(response);
341 subreq = wb_child_request_send(state, state->ev, state->child,
343 if (tevent_req_nomem(subreq, req)) {
346 tevent_req_set_callback(subreq, wb_domain_request_initialized, req);
349 static void wb_domain_request_initialized(struct tevent_req *subreq)
351 struct tevent_req *req = tevent_req_callback_data(
352 subreq, struct tevent_req);
353 struct wb_domain_request_state *state = tevent_req_data(
354 req, struct wb_domain_request_state);
355 struct winbindd_response *response;
358 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
361 tevent_req_error(req, err);
365 if (!string_to_sid(&state->domain->sid,
366 response->data.domain_info.sid)) {
367 DEBUG(1,("init_child_recv: Could not convert sid %s "
368 "from string\n", response->data.domain_info.sid));
369 tevent_req_error(req, EINVAL);
372 fstrcpy(state->domain->name, response->data.domain_info.name);
373 fstrcpy(state->domain->alt_name, response->data.domain_info.alt_name);
374 state->domain->native_mode = response->data.domain_info.native_mode;
375 state->domain->active_directory =
376 response->data.domain_info.active_directory;
377 state->domain->initialized = true;
379 TALLOC_FREE(response);
381 subreq = wb_child_request_send(state, state->ev, state->child,
383 if (tevent_req_nomem(subreq, req)) {
386 tevent_req_set_callback(subreq, wb_domain_request_done, req);
389 static void wb_domain_request_done(struct tevent_req *subreq)
391 struct tevent_req *req = tevent_req_callback_data(
392 subreq, struct tevent_req);
393 struct wb_domain_request_state *state = tevent_req_data(
394 req, struct wb_domain_request_state);
397 ret = wb_child_request_recv(subreq, talloc_tos(), &state->response,
401 tevent_req_error(req, err);
404 tevent_req_done(req);
407 int wb_domain_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
408 struct winbindd_response **presponse, int *err)
410 struct wb_domain_request_state *state = tevent_req_data(
411 req, struct wb_domain_request_state);
413 if (tevent_req_is_unix_error(req, err)) {
416 *presponse = talloc_move(mem_ctx, &state->response);
420 static void child_process_request(struct winbindd_child *child,
421 struct winbindd_cli_state *state)
423 struct winbindd_domain *domain = child->domain;
424 const struct winbindd_child_dispatch_table *table = child->table;
426 /* Free response data - we may be interrupted and receive another
427 command before being able to send this data off. */
429 state->response->result = WINBINDD_ERROR;
430 state->response->length = sizeof(struct winbindd_response);
432 /* as all requests in the child are sync, we can use talloc_tos() */
433 state->mem_ctx = talloc_tos();
435 /* Process command */
437 for (; table->name; table++) {
438 if (state->request->cmd == table->struct_cmd) {
439 DEBUG(10,("child_process_request: request fn %s\n",
441 state->response->result = table->struct_fn(domain, state);
446 DEBUG(1, ("child_process_request: unknown request fn number %d\n",
447 (int)state->request->cmd));
448 state->response->result = WINBINDD_ERROR;
451 void setup_child(struct winbindd_domain *domain, struct winbindd_child *child,
452 const struct winbindd_child_dispatch_table *table,
453 const char *logprefix,
456 if (logprefix && logname) {
457 char *logbase = NULL;
462 if (asprintf(&logbase, "%s", lp_logfile()) < 0) {
463 smb_panic("Internal error: asprintf failed");
466 if ((end = strrchr_m(logbase, '/'))) {
470 if (asprintf(&logbase, "%s", get_dyn_LOGFILEBASE()) < 0) {
471 smb_panic("Internal error: asprintf failed");
475 if (asprintf(&child->logfilename, "%s/%s-%s",
476 logbase, logprefix, logname) < 0) {
478 smb_panic("Internal error: asprintf failed");
483 smb_panic("Internal error: logprefix == NULL && "
488 child->domain = domain;
489 child->table = table;
490 child->queue = tevent_queue_create(NULL, "winbind_child");
491 SMB_ASSERT(child->queue != NULL);
492 child->binding_handle = wbint_binding_handle(NULL, domain, child);
493 SMB_ASSERT(child->binding_handle != NULL);
496 static struct winbindd_child *winbindd_children = NULL;
498 void winbind_child_died(pid_t pid)
500 struct winbindd_child *child;
502 for (child = winbindd_children; child != NULL; child = child->next) {
503 if (child->pid == pid) {
509 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
513 /* This will be re-added in fork_domain_child() */
515 DLIST_REMOVE(winbindd_children, child);
519 /* Ensure any negative cache entries with the netbios or realm names are removed. */
521 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
523 flush_negative_conn_cache_for_domain(domain->name);
524 if (*domain->alt_name) {
525 flush_negative_conn_cache_for_domain(domain->alt_name);
530 * Parent winbindd process sets its own debug level first and then
531 * sends a message to all the winbindd children to adjust their debug
532 * level to that of parents.
535 void winbind_msg_debug(struct messaging_context *msg_ctx,
538 struct server_id server_id,
541 struct winbindd_child *child;
543 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
545 debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
547 for (child = winbindd_children; child != NULL; child = child->next) {
549 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
550 (unsigned int)child->pid));
552 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
555 strlen((char *) data->data) + 1);
559 /* Set our domains as offline and forward the offline message to our children. */
561 void winbind_msg_offline(struct messaging_context *msg_ctx,
564 struct server_id server_id,
567 struct winbindd_child *child;
568 struct winbindd_domain *domain;
570 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
572 if (!lp_winbind_offline_logon()) {
573 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
577 /* Set our global state as offline. */
578 if (!set_global_winbindd_state_offline()) {
579 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
583 /* Set all our domains as offline. */
584 for (domain = domain_list(); domain; domain = domain->next) {
585 if (domain->internal) {
588 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
589 set_domain_offline(domain);
592 for (child = winbindd_children; child != NULL; child = child->next) {
593 /* Don't send message to internal children. We've already
595 if (!child->domain || winbindd_internal_child(child)) {
599 /* Or internal domains (this should not be possible....) */
600 if (child->domain->internal) {
604 /* Each winbindd child should only process requests for one domain - make sure
605 we only set it online / offline for that domain. */
607 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
608 (unsigned int)child->pid, domain->name ));
610 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
612 (uint8 *)child->domain->name,
613 strlen(child->domain->name)+1);
617 /* Set our domains as online and forward the online message to our children. */
619 void winbind_msg_online(struct messaging_context *msg_ctx,
622 struct server_id server_id,
625 struct winbindd_child *child;
626 struct winbindd_domain *domain;
628 DEBUG(10,("winbind_msg_online: got online message.\n"));
630 if (!lp_winbind_offline_logon()) {
631 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
635 /* Set our global state as online. */
636 set_global_winbindd_state_online();
638 smb_nscd_flush_user_cache();
639 smb_nscd_flush_group_cache();
641 /* Set all our domains as online. */
642 for (domain = domain_list(); domain; domain = domain->next) {
643 if (domain->internal) {
646 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
648 winbindd_flush_negative_conn_cache(domain);
649 set_domain_online_request(domain);
651 /* Send an online message to the idmap child when our
652 primary domain comes back online */
654 if ( domain->primary ) {
655 struct winbindd_child *idmap = idmap_child();
657 if ( idmap->pid != 0 ) {
658 messaging_send_buf(msg_ctx,
659 pid_to_procid(idmap->pid),
661 (uint8 *)domain->name,
662 strlen(domain->name)+1);
667 for (child = winbindd_children; child != NULL; child = child->next) {
668 /* Don't send message to internal childs. */
669 if (!child->domain || winbindd_internal_child(child)) {
673 /* Or internal domains (this should not be possible....) */
674 if (child->domain->internal) {
678 /* Each winbindd child should only process requests for one domain - make sure
679 we only set it online / offline for that domain. */
681 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
682 (unsigned int)child->pid, child->domain->name ));
684 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
686 (uint8 *)child->domain->name,
687 strlen(child->domain->name)+1);
691 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
693 struct winbindd_domain *domain;
696 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
697 get_global_winbindd_state_offline() ?
698 "Offline":"Online")) == NULL) {
702 for (domain = domain_list(); domain; domain = domain->next) {
703 if ((buf = talloc_asprintf_append_buffer(buf, "%s:%s ",
706 "Online":"Offline")) == NULL) {
711 buf = talloc_asprintf_append_buffer(buf, "\n");
713 DEBUG(5,("collect_onlinestatus: %s", buf));
718 void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
721 struct server_id server_id,
726 struct server_id *sender;
728 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
734 sender = (struct server_id *)data->data;
736 mem_ctx = talloc_init("winbind_msg_onlinestatus");
737 if (mem_ctx == NULL) {
741 message = collect_onlinestatus(mem_ctx);
742 if (message == NULL) {
743 talloc_destroy(mem_ctx);
747 messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
748 (uint8 *)message, strlen(message) + 1);
750 talloc_destroy(mem_ctx);
753 void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
756 struct server_id server_id,
759 struct winbindd_child *child;
761 DEBUG(10,("winbind_msg_dump_event_list received\n"));
763 dump_event_list(winbind_event_context());
765 for (child = winbindd_children; child != NULL; child = child->next) {
767 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
768 (unsigned int)child->pid));
770 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
777 void winbind_msg_dump_domain_list(struct messaging_context *msg_ctx,
780 struct server_id server_id,
784 const char *message = NULL;
785 struct server_id *sender = NULL;
786 const char *domain = NULL;
789 struct winbindd_domain *dom = NULL;
791 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
793 if (!data || !data->data) {
797 if (data->length < sizeof(struct server_id)) {
801 mem_ctx = talloc_init("winbind_msg_dump_domain_list");
806 sender = (struct server_id *)data->data;
807 if (data->length > sizeof(struct server_id)) {
808 domain = (const char *)data->data+sizeof(struct server_id);
813 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
816 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain,
817 find_domain_from_name_noinit(domain));
819 talloc_destroy(mem_ctx);
823 messaging_send_buf(msg_ctx, *sender,
824 MSG_WINBIND_DUMP_DOMAIN_LIST,
825 (uint8_t *)message, strlen(message) + 1);
827 talloc_destroy(mem_ctx);
832 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
834 for (dom = domain_list(); dom; dom=dom->next) {
835 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain, dom);
837 talloc_destroy(mem_ctx);
841 s = talloc_asprintf_append(s, "%s\n", message);
843 talloc_destroy(mem_ctx);
848 status = messaging_send_buf(msg_ctx, *sender,
849 MSG_WINBIND_DUMP_DOMAIN_LIST,
850 (uint8_t *)s, strlen(s) + 1);
851 if (!NT_STATUS_IS_OK(status)) {
852 DEBUG(0,("failed to send message: %s\n",
856 talloc_destroy(mem_ctx);
859 static void account_lockout_policy_handler(struct event_context *ctx,
860 struct timed_event *te,
864 struct winbindd_child *child =
865 (struct winbindd_child *)private_data;
866 TALLOC_CTX *mem_ctx = NULL;
867 struct winbindd_methods *methods;
868 struct samr_DomInfo12 lockout_policy;
871 DEBUG(10,("account_lockout_policy_handler called\n"));
873 TALLOC_FREE(child->lockout_policy_event);
875 if ( !winbindd_can_contact_domain( child->domain ) ) {
876 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
877 "do not have an incoming trust to domain %s\n",
878 child->domain->name));
883 methods = child->domain->methods;
885 mem_ctx = talloc_init("account_lockout_policy_handler ctx");
887 result = NT_STATUS_NO_MEMORY;
889 result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
891 TALLOC_FREE(mem_ctx);
893 if (!NT_STATUS_IS_OK(result)) {
894 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
898 child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
899 timeval_current_ofs(3600, 0),
900 account_lockout_policy_handler,
904 static time_t get_machine_password_timeout(void)
906 /* until we have gpo support use lp setting */
907 return lp_machine_password_timeout();
910 static bool calculate_next_machine_pwd_change(const char *domain,
913 time_t pass_last_set_time;
919 pw = secrets_fetch_machine_password(domain,
924 DEBUG(0,("cannot fetch own machine password ????"));
930 timeout = get_machine_password_timeout();
932 DEBUG(10,("machine password never expires\n"));
936 tv.tv_sec = pass_last_set_time;
937 DEBUG(10, ("password last changed %s\n",
938 timeval_string(talloc_tos(), &tv, false)));
939 tv.tv_sec += timeout;
940 DEBUGADD(10, ("password valid until %s\n",
941 timeval_string(talloc_tos(), &tv, false)));
943 if (time(NULL) < (pass_last_set_time + timeout)) {
944 next_change = pass_last_set_time + timeout;
945 DEBUG(10,("machine password still valid until: %s\n",
946 http_timestring(talloc_tos(), next_change)));
947 *t = timeval_set(next_change, 0);
949 if (lp_clustering()) {
952 * When having a cluster, we have several
953 * winbinds racing for the password change. In
954 * the machine_password_change_handler()
955 * function we check if someone else was
956 * faster when the event triggers. We add a
957 * 255-second random delay here, so that we
958 * don't run to change the password at the
961 generate_random_buffer(&randbuf, sizeof(randbuf));
962 DEBUG(10, ("adding %d seconds randomness\n",
964 t->tv_sec += randbuf;
969 DEBUG(10,("machine password expired, needs immediate change\n"));
976 static void machine_password_change_handler(struct event_context *ctx,
977 struct timed_event *te,
981 struct winbindd_child *child =
982 (struct winbindd_child *)private_data;
983 struct rpc_pipe_client *netlogon_pipe = NULL;
986 struct timeval next_change;
988 DEBUG(10,("machine_password_change_handler called\n"));
990 TALLOC_FREE(child->machine_password_change_event);
992 if (!calculate_next_machine_pwd_change(child->domain->name,
994 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
998 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
999 timeval_string(talloc_tos(), &next_change, false)));
1001 if (!timeval_expired(&next_change)) {
1002 DEBUG(10, ("Someone else has already changed the pw\n"));
1006 if (!winbindd_can_contact_domain(child->domain)) {
1007 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1008 "do not have an incoming trust to domain %s\n",
1009 child->domain->name));
1013 result = cm_connect_netlogon(child->domain, &netlogon_pipe);
1014 if (!NT_STATUS_IS_OK(result)) {
1015 DEBUG(10,("machine_password_change_handler: "
1016 "failed to connect netlogon pipe: %s\n",
1017 nt_errstr(result)));
1021 frame = talloc_stackframe();
1023 result = trust_pw_find_change_and_store_it(netlogon_pipe,
1025 child->domain->name);
1028 DEBUG(10, ("machine_password_change_handler: "
1029 "trust_pw_find_change_and_store_it returned %s\n",
1030 nt_errstr(result)));
1032 if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1033 DEBUG(3,("machine_password_change_handler: password set returned "
1034 "ACCESS_DENIED. Maybe the trust account "
1035 "password was changed and we didn't know it. "
1036 "Killing connections to domain %s\n",
1037 child->domain->name));
1038 TALLOC_FREE(child->domain->conn.netlogon_pipe);
1041 if (!calculate_next_machine_pwd_change(child->domain->name,
1043 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1047 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1048 timeval_string(talloc_tos(), &next_change, false)));
1050 if (!NT_STATUS_IS_OK(result)) {
1053 * In case of failure, give the DC a minute to recover
1055 tmp = timeval_current_ofs(60, 0);
1056 next_change = timeval_max(&next_change, &tmp);
1060 child->machine_password_change_event = event_add_timed(winbind_event_context(), NULL,
1062 machine_password_change_handler,
1066 /* Deal with a request to go offline. */
1068 static void child_msg_offline(struct messaging_context *msg,
1071 struct server_id server_id,
1074 struct winbindd_domain *domain;
1075 struct winbindd_domain *primary_domain = NULL;
1076 const char *domainname = (const char *)data->data;
1078 if (data->data == NULL || data->length == 0) {
1082 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
1084 if (!lp_winbind_offline_logon()) {
1085 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1089 primary_domain = find_our_domain();
1091 /* Mark the requested domain offline. */
1093 for (domain = domain_list(); domain; domain = domain->next) {
1094 if (domain->internal) {
1097 if (strequal(domain->name, domainname)) {
1098 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
1099 set_domain_offline(domain);
1100 /* we are in the trusted domain, set the primary domain
1102 if (domain != primary_domain) {
1103 set_domain_offline(primary_domain);
1109 /* Deal with a request to go online. */
1111 static void child_msg_online(struct messaging_context *msg,
1114 struct server_id server_id,
1117 struct winbindd_domain *domain;
1118 struct winbindd_domain *primary_domain = NULL;
1119 const char *domainname = (const char *)data->data;
1121 if (data->data == NULL || data->length == 0) {
1125 DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
1127 if (!lp_winbind_offline_logon()) {
1128 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1132 primary_domain = find_our_domain();
1134 /* Set our global state as online. */
1135 set_global_winbindd_state_online();
1137 /* Try and mark everything online - delete any negative cache entries
1138 to force a reconnect now. */
1140 for (domain = domain_list(); domain; domain = domain->next) {
1141 if (domain->internal) {
1144 if (strequal(domain->name, domainname)) {
1145 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
1146 winbindd_flush_negative_conn_cache(domain);
1147 set_domain_online_request(domain);
1149 /* we can be in trusted domain, which will contact primary domain
1150 * we have to bring primary domain online in trusted domain process
1151 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1152 * --> contact_domain = find_our_domain()
1154 if (domain != primary_domain) {
1155 winbindd_flush_negative_conn_cache(primary_domain);
1156 set_domain_online_request(primary_domain);
1162 static void child_msg_dump_event_list(struct messaging_context *msg,
1165 struct server_id server_id,
1168 DEBUG(5,("child_msg_dump_event_list received\n"));
1170 dump_event_list(winbind_event_context());
1173 bool winbindd_reinit_after_fork(const char *logfilename)
1175 struct winbindd_domain *domain;
1176 struct winbindd_child *cl;
1179 status = reinit_after_fork(
1180 winbind_messaging_context(),
1181 winbind_event_context(),
1184 if (!NT_STATUS_IS_OK(status)) {
1185 DEBUG(0,("reinit_after_fork() failed\n"));
1189 close_conns_after_fork();
1191 if (!override_logfile && logfilename) {
1192 lp_set_logfile(logfilename);
1196 if (!winbindd_setup_sig_term_handler(false))
1198 if (!winbindd_setup_sig_hup_handler(override_logfile ? NULL :
1202 /* Stop zombies in children */
1205 /* Don't handle the same messages as our parent. */
1206 messaging_deregister(winbind_messaging_context(),
1207 MSG_SMB_CONF_UPDATED, NULL);
1208 messaging_deregister(winbind_messaging_context(),
1209 MSG_SHUTDOWN, NULL);
1210 messaging_deregister(winbind_messaging_context(),
1211 MSG_WINBIND_OFFLINE, NULL);
1212 messaging_deregister(winbind_messaging_context(),
1213 MSG_WINBIND_ONLINE, NULL);
1214 messaging_deregister(winbind_messaging_context(),
1215 MSG_WINBIND_ONLINESTATUS, NULL);
1216 messaging_deregister(winbind_messaging_context(),
1217 MSG_DUMP_EVENT_LIST, NULL);
1218 messaging_deregister(winbind_messaging_context(),
1219 MSG_WINBIND_DUMP_DOMAIN_LIST, NULL);
1220 messaging_deregister(winbind_messaging_context(),
1223 /* We have destroyed all events in the winbindd_event_context
1224 * in reinit_after_fork(), so clean out all possible pending
1225 * event pointers. */
1227 /* Deal with check_online_events. */
1229 for (domain = domain_list(); domain; domain = domain->next) {
1230 TALLOC_FREE(domain->check_online_event);
1233 /* Ensure we're not handling a credential cache event inherited
1234 * from our parent. */
1236 ccache_remove_all_after_fork();
1238 /* Destroy all possible events in child list. */
1239 for (cl = winbindd_children; cl != NULL; cl = cl->next) {
1240 TALLOC_FREE(cl->lockout_policy_event);
1241 TALLOC_FREE(cl->machine_password_change_event);
1243 /* Children should never be able to send
1244 * each other messages, all messages must
1245 * go through the parent.
1250 * This is a little tricky, children must not
1251 * send an MSG_WINBIND_ONLINE message to idmap_child().
1252 * If we are in a child of our primary domain or
1253 * in the process created by fork_child_dc_connect(),
1254 * and the primary domain cannot go online,
1255 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1256 * periodically to idmap_child().
1258 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1259 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1260 * ---> init_dc_connection() ---> cm_open_connection --->
1261 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1262 * idmap_child(). Disallow children sending messages
1263 * to each other, all messages must go through the parent.
1272 * In a child there will be only one domain, reference that here.
1274 static struct winbindd_domain *child_domain;
1276 struct winbindd_domain *wb_child_domain(void)
1278 return child_domain;
1281 static bool fork_domain_child(struct winbindd_child *child)
1284 struct winbindd_cli_state state;
1285 struct winbindd_request request;
1286 struct winbindd_response response;
1287 struct winbindd_domain *primary_domain = NULL;
1289 if (child->domain) {
1290 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1291 child->domain->name));
1293 DEBUG(10, ("fork_domain_child called without domain.\n"));
1296 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
1297 DEBUG(0, ("Could not open child pipe: %s\n",
1303 state.pid = sys_getpid();
1304 state.request = &request;
1305 state.response = &response;
1307 child->pid = sys_fork();
1309 if (child->pid == -1) {
1310 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
1314 if (child->pid != 0) {
1317 child->next = child->prev = NULL;
1318 DLIST_ADD(winbindd_children, child);
1319 child->sock = fdpair[1];
1324 child_domain = child->domain;
1326 DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
1328 state.sock = fdpair[0];
1331 if (!winbindd_reinit_after_fork(child->logfilename)) {
1335 /* Handle online/offline messages. */
1336 messaging_register(winbind_messaging_context(), NULL,
1337 MSG_WINBIND_OFFLINE, child_msg_offline);
1338 messaging_register(winbind_messaging_context(), NULL,
1339 MSG_WINBIND_ONLINE, child_msg_online);
1340 messaging_register(winbind_messaging_context(), NULL,
1341 MSG_DUMP_EVENT_LIST, child_msg_dump_event_list);
1342 messaging_register(winbind_messaging_context(), NULL,
1343 MSG_DEBUG, debug_message);
1344 messaging_register(winbind_messaging_context(), NULL,
1345 MSG_WINBIND_IP_DROPPED,
1346 winbind_msg_ip_dropped);
1349 primary_domain = find_our_domain();
1351 if (primary_domain == NULL) {
1352 smb_panic("no primary domain found");
1355 /* It doesn't matter if we allow cache login,
1356 * try to bring domain online after fork. */
1357 if ( child->domain ) {
1358 child->domain->startup = True;
1359 child->domain->startup_time = time_mono(NULL);
1360 /* we can be in primary domain or in trusted domain
1361 * If we are in trusted domain, set the primary domain
1362 * in start-up mode */
1363 if (!(child->domain->internal)) {
1364 set_domain_online_request(child->domain);
1365 if (!(child->domain->primary)) {
1366 primary_domain->startup = True;
1367 primary_domain->startup_time = time_mono(NULL);
1368 set_domain_online_request(primary_domain);
1374 * We are in idmap child, make sure that we set the
1375 * check_online_event to bring primary domain online.
1377 if (child == idmap_child()) {
1378 set_domain_online_request(primary_domain);
1381 /* We might be in the idmap child...*/
1382 if (child->domain && !(child->domain->internal) &&
1383 lp_winbind_offline_logon()) {
1385 set_domain_online_request(child->domain);
1387 if (primary_domain && (primary_domain != child->domain)) {
1388 /* We need to talk to the primary
1389 * domain as well as the trusted
1390 * domain inside a trusted domain
1393 * set_dc_type_and_flags_trustinfo()
1396 set_domain_online_request(primary_domain);
1399 child->lockout_policy_event = event_add_timed(
1400 winbind_event_context(), NULL, timeval_zero(),
1401 account_lockout_policy_handler,
1405 if (child->domain && child->domain->primary &&
1406 !USE_KERBEROS_KEYTAB &&
1407 lp_server_role() == ROLE_DOMAIN_MEMBER) {
1409 struct timeval next_change;
1411 if (calculate_next_machine_pwd_change(child->domain->name,
1413 child->machine_password_change_event = event_add_timed(
1414 winbind_event_context(), NULL, next_change,
1415 machine_password_change_handler,
1423 struct pollfd *pfds;
1428 TALLOC_CTX *frame = talloc_stackframe();
1429 struct iovec iov[2];
1433 if (run_events_poll(winbind_event_context(), 0, NULL, 0)) {
1438 if (child->domain && child->domain->startup &&
1439 (time_mono(NULL) > child->domain->startup_time + 30)) {
1440 /* No longer in "startup" mode. */
1441 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1442 child->domain->name ));
1443 child->domain->startup = False;
1446 pfds = TALLOC_ZERO_P(talloc_tos(), struct pollfd);
1448 DEBUG(1, ("talloc failed\n"));
1452 pfds->fd = state.sock;
1453 pfds->events = POLLIN|POLLHUP;
1458 if (!event_add_to_poll_args(
1459 winbind_event_context(), talloc_tos(),
1460 &pfds, &num_pfds, &timeout)) {
1461 DEBUG(1, ("event_add_to_poll_args failed\n"));
1464 tp = get_timed_events_timeout(winbind_event_context(), &t);
1466 DEBUG(11,("select will use timeout of %u.%u seconds\n",
1467 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
1470 ret = sys_poll(pfds, num_pfds, timeout);
1472 if (run_events_poll(winbind_event_context(), ret,
1474 /* We got a signal - continue. */
1482 DEBUG(11,("nothing is ready yet, continue\n"));
1487 if (ret == -1 && errno == EINTR) {
1488 /* We got a signal - continue. */
1493 if (ret == -1 && errno != EINTR) {
1494 DEBUG(0,("poll error occured\n"));
1500 /* fetch a request from the main daemon */
1501 status = child_read_request(&state);
1503 if (!NT_STATUS_IS_OK(status)) {
1504 /* we lost contact with our parent */
1508 DEBUG(4,("child daemon request %d\n", (int)state.request->cmd));
1510 ZERO_STRUCTP(state.response);
1511 state.request->null_term = '\0';
1512 state.mem_ctx = frame;
1513 child_process_request(child, &state);
1515 DEBUG(4, ("Finished processing child request %d\n",
1516 (int)state.request->cmd));
1518 SAFE_FREE(state.request->extra_data.data);
1520 iov[0].iov_base = (void *)state.response;
1521 iov[0].iov_len = sizeof(struct winbindd_response);
1524 if (state.response->length > sizeof(struct winbindd_response)) {
1526 (void *)state.response->extra_data.data;
1527 iov[1].iov_len = state.response->length-iov[0].iov_len;
1531 DEBUG(10, ("Writing %d bytes to parent\n",
1532 (int)state.response->length));
1534 if (write_data_iov(state.sock, iov, iov_count) !=
1535 state.response->length) {
1536 DEBUG(0, ("Could not write result\n"));
1543 void winbind_msg_ip_dropped_parent(struct messaging_context *msg_ctx,
1546 struct server_id server_id,
1549 struct winbindd_child *child;
1551 winbind_msg_ip_dropped(msg_ctx, private_data, msg_type,
1555 for (child = winbindd_children; child != NULL; child = child->next) {
1556 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
1557 msg_type, data->data, data->length);