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 "lib/wb_reqtrans.h"
33 #include "librpc/gen_ndr/messaging.h"
35 #include "../lib/util/select.h"
36 #include "../libcli/security/security.h"
39 #define DBGC_CLASS DBGC_WINBIND
41 extern bool override_logfile;
42 extern struct winbindd_methods cache_methods;
44 /* Read some data from a client connection */
46 static NTSTATUS child_read_request(struct winbindd_cli_state *state)
52 status = read_data(state->sock, (char *)state->request,
53 sizeof(*state->request));
55 if (!NT_STATUS_IS_OK(status)) {
56 DEBUG(3, ("child_read_request: read_data failed: %s\n",
61 if (state->request->extra_len == 0) {
62 state->request->extra_data.data = NULL;
66 DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request->extra_len));
68 state->request->extra_data.data =
69 SMB_MALLOC_ARRAY(char, state->request->extra_len + 1);
71 if (state->request->extra_data.data == NULL) {
72 DEBUG(0, ("malloc failed\n"));
73 return NT_STATUS_NO_MEMORY;
76 /* Ensure null termination */
77 state->request->extra_data.data[state->request->extra_len] = '\0';
79 status= read_data(state->sock, state->request->extra_data.data,
80 state->request->extra_len);
82 if (!NT_STATUS_IS_OK(status)) {
83 DEBUG(0, ("Could not read extra data: %s\n",
90 * Do winbind child async request. This is not simply wb_simple_trans. We have
91 * to do the queueing ourselves because while a request is queued, the child
92 * might have crashed, and we have to re-fork it in the _trigger function.
95 struct wb_child_request_state {
96 struct tevent_context *ev;
97 struct winbindd_child *child;
98 struct winbindd_request *request;
99 struct winbindd_response *response;
102 static bool fork_domain_child(struct winbindd_child *child);
104 static void wb_child_request_trigger(struct tevent_req *req,
106 static void wb_child_request_done(struct tevent_req *subreq);
108 struct tevent_req *wb_child_request_send(TALLOC_CTX *mem_ctx,
109 struct tevent_context *ev,
110 struct winbindd_child *child,
111 struct winbindd_request *request)
113 struct tevent_req *req;
114 struct wb_child_request_state *state;
116 req = tevent_req_create(mem_ctx, &state,
117 struct wb_child_request_state);
123 state->child = child;
124 state->request = request;
126 if (!tevent_queue_add(child->queue, ev, req,
127 wb_child_request_trigger, NULL)) {
128 tevent_req_nomem(NULL, req);
129 return tevent_req_post(req, ev);
134 static void wb_child_request_trigger(struct tevent_req *req,
137 struct wb_child_request_state *state = tevent_req_data(
138 req, struct wb_child_request_state);
139 struct tevent_req *subreq;
141 if ((state->child->sock == -1) && (!fork_domain_child(state->child))) {
142 tevent_req_error(req, errno);
146 subreq = wb_simple_trans_send(state, winbind_event_context(), NULL,
147 state->child->sock, state->request);
148 if (tevent_req_nomem(subreq, req)) {
151 tevent_req_set_callback(subreq, wb_child_request_done, req);
153 if (!tevent_req_set_endtime(req, state->ev,
154 timeval_current_ofs(300, 0))) {
155 tevent_req_nomem(NULL, req);
160 static void wb_child_request_done(struct tevent_req *subreq)
162 struct tevent_req *req = tevent_req_callback_data(
163 subreq, struct tevent_req);
164 struct wb_child_request_state *state = tevent_req_data(
165 req, struct wb_child_request_state);
168 ret = wb_simple_trans_recv(subreq, state, &state->response, &err);
172 * The basic parent/child communication broke, close
175 close(state->child->sock);
176 state->child->sock = -1;
177 tevent_req_error(req, err);
180 tevent_req_done(req);
183 int wb_child_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
184 struct winbindd_response **presponse, int *err)
186 struct wb_child_request_state *state = tevent_req_data(
187 req, struct wb_child_request_state);
189 if (tevent_req_is_unix_error(req, err)) {
192 *presponse = talloc_move(mem_ctx, &state->response);
196 struct wb_domain_request_state {
197 struct tevent_context *ev;
198 struct winbindd_domain *domain;
199 struct winbindd_request *request;
200 struct winbindd_request *init_req;
201 struct winbindd_response *response;
204 static void wb_domain_request_gotdc(struct tevent_req *subreq);
205 static void wb_domain_request_initialized(struct tevent_req *subreq);
206 static void wb_domain_request_done(struct tevent_req *subreq);
208 struct tevent_req *wb_domain_request_send(TALLOC_CTX *mem_ctx,
209 struct tevent_context *ev,
210 struct winbindd_domain *domain,
211 struct winbindd_request *request)
213 struct tevent_req *req, *subreq;
214 struct wb_domain_request_state *state;
216 req = tevent_req_create(mem_ctx, &state,
217 struct wb_domain_request_state);
222 if (domain->initialized) {
223 subreq = wb_child_request_send(state, ev, &domain->child,
225 if (tevent_req_nomem(subreq, req)) {
226 return tevent_req_post(req, ev);
228 tevent_req_set_callback(subreq, wb_domain_request_done, req);
232 state->domain = domain;
234 state->request = request;
236 state->init_req = talloc_zero(state, struct winbindd_request);
237 if (tevent_req_nomem(state->init_req, req)) {
238 return tevent_req_post(req, ev);
241 if (IS_DC || domain->primary || domain->internal) {
242 /* The primary domain has to find the DC name itself */
243 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
244 fstrcpy(state->init_req->domain_name, domain->name);
245 state->init_req->data.init_conn.is_primary = domain->primary;
246 fstrcpy(state->init_req->data.init_conn.dcname, "");
248 subreq = wb_child_request_send(state, ev, &domain->child,
250 if (tevent_req_nomem(subreq, req)) {
251 return tevent_req_post(req, ev);
253 tevent_req_set_callback(subreq, wb_domain_request_initialized,
259 * Ask our DC for a DC name
261 domain = find_our_domain();
263 /* This is *not* the primary domain, let's ask our DC about a DC
266 state->init_req->cmd = WINBINDD_GETDCNAME;
267 fstrcpy(state->init_req->domain_name, domain->name);
269 subreq = wb_child_request_send(state, ev, &domain->child, request);
270 if (tevent_req_nomem(subreq, req)) {
271 return tevent_req_post(req, ev);
273 tevent_req_set_callback(subreq, wb_domain_request_gotdc, req);
277 static void wb_domain_request_gotdc(struct tevent_req *subreq)
279 struct tevent_req *req = tevent_req_callback_data(
280 subreq, struct tevent_req);
281 struct wb_domain_request_state *state = tevent_req_data(
282 req, struct wb_domain_request_state);
283 struct winbindd_response *response;
286 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
289 tevent_req_error(req, err);
292 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
293 fstrcpy(state->init_req->domain_name, state->domain->name);
294 state->init_req->data.init_conn.is_primary = False;
295 fstrcpy(state->init_req->data.init_conn.dcname,
296 response->data.dc_name);
298 TALLOC_FREE(response);
300 subreq = wb_child_request_send(state, state->ev, &state->domain->child,
302 if (tevent_req_nomem(subreq, req)) {
305 tevent_req_set_callback(subreq, wb_domain_request_initialized, req);
308 static void wb_domain_request_initialized(struct tevent_req *subreq)
310 struct tevent_req *req = tevent_req_callback_data(
311 subreq, struct tevent_req);
312 struct wb_domain_request_state *state = tevent_req_data(
313 req, struct wb_domain_request_state);
314 struct winbindd_response *response;
317 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
320 tevent_req_error(req, err);
324 if (!string_to_sid(&state->domain->sid,
325 response->data.domain_info.sid)) {
326 DEBUG(1,("init_child_recv: Could not convert sid %s "
327 "from string\n", response->data.domain_info.sid));
328 tevent_req_error(req, EINVAL);
331 fstrcpy(state->domain->name, response->data.domain_info.name);
332 fstrcpy(state->domain->alt_name, response->data.domain_info.alt_name);
333 state->domain->native_mode = response->data.domain_info.native_mode;
334 state->domain->active_directory =
335 response->data.domain_info.active_directory;
336 state->domain->initialized = true;
338 TALLOC_FREE(response);
340 subreq = wb_child_request_send(state, state->ev, &state->domain->child,
342 if (tevent_req_nomem(subreq, req)) {
345 tevent_req_set_callback(subreq, wb_domain_request_done, req);
348 static void wb_domain_request_done(struct tevent_req *subreq)
350 struct tevent_req *req = tevent_req_callback_data(
351 subreq, struct tevent_req);
352 struct wb_domain_request_state *state = tevent_req_data(
353 req, struct wb_domain_request_state);
356 ret = wb_child_request_recv(subreq, talloc_tos(), &state->response,
360 tevent_req_error(req, err);
363 tevent_req_done(req);
366 int wb_domain_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
367 struct winbindd_response **presponse, int *err)
369 struct wb_domain_request_state *state = tevent_req_data(
370 req, struct wb_domain_request_state);
372 if (tevent_req_is_unix_error(req, err)) {
375 *presponse = talloc_move(mem_ctx, &state->response);
379 static void child_process_request(struct winbindd_child *child,
380 struct winbindd_cli_state *state)
382 struct winbindd_domain *domain = child->domain;
383 const struct winbindd_child_dispatch_table *table = child->table;
385 /* Free response data - we may be interrupted and receive another
386 command before being able to send this data off. */
388 state->response->result = WINBINDD_ERROR;
389 state->response->length = sizeof(struct winbindd_response);
391 /* as all requests in the child are sync, we can use talloc_tos() */
392 state->mem_ctx = talloc_tos();
394 /* Process command */
396 for (; table->name; table++) {
397 if (state->request->cmd == table->struct_cmd) {
398 DEBUG(10,("child_process_request: request fn %s\n",
400 state->response->result = table->struct_fn(domain, state);
405 DEBUG(1 ,("child_process_request: unknown request fn number %d\n",
406 (int)state->request->cmd));
407 state->response->result = WINBINDD_ERROR;
410 void setup_child(struct winbindd_domain *domain, struct winbindd_child *child,
411 const struct winbindd_child_dispatch_table *table,
412 const char *logprefix,
415 if (logprefix && logname) {
416 char *logbase = NULL;
421 if (asprintf(&logbase, "%s", lp_logfile()) < 0) {
422 smb_panic("Internal error: asprintf failed");
425 if ((end = strrchr_m(logbase, '/'))) {
429 if (asprintf(&logbase, "%s", get_dyn_LOGFILEBASE()) < 0) {
430 smb_panic("Internal error: asprintf failed");
434 if (asprintf(&child->logfilename, "%s/%s-%s",
435 logbase, logprefix, logname) < 0) {
437 smb_panic("Internal error: asprintf failed");
442 smb_panic("Internal error: logprefix == NULL && "
447 child->domain = domain;
448 child->table = table;
449 child->queue = tevent_queue_create(NULL, "winbind_child");
450 SMB_ASSERT(child->queue != NULL);
451 child->binding_handle = wbint_binding_handle(NULL, domain, child);
452 SMB_ASSERT(child->binding_handle != NULL);
455 static struct winbindd_child *winbindd_children = NULL;
457 void winbind_child_died(pid_t pid)
459 struct winbindd_child *child;
461 for (child = winbindd_children; child != NULL; child = child->next) {
462 if (child->pid == pid) {
468 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
472 /* This will be re-added in fork_domain_child() */
474 DLIST_REMOVE(winbindd_children, child);
478 /* Ensure any negative cache entries with the netbios or realm names are removed. */
480 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
482 flush_negative_conn_cache_for_domain(domain->name);
483 if (*domain->alt_name) {
484 flush_negative_conn_cache_for_domain(domain->alt_name);
489 * Parent winbindd process sets its own debug level first and then
490 * sends a message to all the winbindd children to adjust their debug
491 * level to that of parents.
494 void winbind_msg_debug(struct messaging_context *msg_ctx,
497 struct server_id server_id,
500 struct winbindd_child *child;
502 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
504 debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
506 for (child = winbindd_children; child != NULL; child = child->next) {
508 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
509 (unsigned int)child->pid));
511 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
514 strlen((char *) data->data) + 1);
518 /* Set our domains as offline and forward the offline message to our children. */
520 void winbind_msg_offline(struct messaging_context *msg_ctx,
523 struct server_id server_id,
526 struct winbindd_child *child;
527 struct winbindd_domain *domain;
529 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
531 if (!lp_winbind_offline_logon()) {
532 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
536 /* Set our global state as offline. */
537 if (!set_global_winbindd_state_offline()) {
538 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
542 /* Set all our domains as offline. */
543 for (domain = domain_list(); domain; domain = domain->next) {
544 if (domain->internal) {
547 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
548 set_domain_offline(domain);
551 for (child = winbindd_children; child != NULL; child = child->next) {
552 /* Don't send message to internal children. We've already
554 if (!child->domain || winbindd_internal_child(child)) {
558 /* Or internal domains (this should not be possible....) */
559 if (child->domain->internal) {
563 /* Each winbindd child should only process requests for one domain - make sure
564 we only set it online / offline for that domain. */
566 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
567 (unsigned int)child->pid, domain->name ));
569 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
571 (uint8 *)child->domain->name,
572 strlen(child->domain->name)+1);
576 /* Set our domains as online and forward the online message to our children. */
578 void winbind_msg_online(struct messaging_context *msg_ctx,
581 struct server_id server_id,
584 struct winbindd_child *child;
585 struct winbindd_domain *domain;
587 DEBUG(10,("winbind_msg_online: got online message.\n"));
589 if (!lp_winbind_offline_logon()) {
590 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
594 /* Set our global state as online. */
595 set_global_winbindd_state_online();
597 smb_nscd_flush_user_cache();
598 smb_nscd_flush_group_cache();
600 /* Set all our domains as online. */
601 for (domain = domain_list(); domain; domain = domain->next) {
602 if (domain->internal) {
605 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
607 winbindd_flush_negative_conn_cache(domain);
608 set_domain_online_request(domain);
610 /* Send an online message to the idmap child when our
611 primary domain comes back online */
613 if ( domain->primary ) {
614 struct winbindd_child *idmap = idmap_child();
616 if ( idmap->pid != 0 ) {
617 messaging_send_buf(msg_ctx,
618 pid_to_procid(idmap->pid),
620 (uint8 *)domain->name,
621 strlen(domain->name)+1);
626 for (child = winbindd_children; child != NULL; child = child->next) {
627 /* Don't send message to internal childs. */
628 if (!child->domain || winbindd_internal_child(child)) {
632 /* Or internal domains (this should not be possible....) */
633 if (child->domain->internal) {
637 /* Each winbindd child should only process requests for one domain - make sure
638 we only set it online / offline for that domain. */
640 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
641 (unsigned int)child->pid, child->domain->name ));
643 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
645 (uint8 *)child->domain->name,
646 strlen(child->domain->name)+1);
650 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
652 struct winbindd_domain *domain;
655 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
656 get_global_winbindd_state_offline() ?
657 "Offline":"Online")) == NULL) {
661 for (domain = domain_list(); domain; domain = domain->next) {
662 if ((buf = talloc_asprintf_append_buffer(buf, "%s:%s ",
665 "Online":"Offline")) == NULL) {
670 buf = talloc_asprintf_append_buffer(buf, "\n");
672 DEBUG(5,("collect_onlinestatus: %s", buf));
677 void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
680 struct server_id server_id,
685 struct server_id *sender;
687 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
693 sender = (struct server_id *)data->data;
695 mem_ctx = talloc_init("winbind_msg_onlinestatus");
696 if (mem_ctx == NULL) {
700 message = collect_onlinestatus(mem_ctx);
701 if (message == NULL) {
702 talloc_destroy(mem_ctx);
706 messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
707 (uint8 *)message, strlen(message) + 1);
709 talloc_destroy(mem_ctx);
712 void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
715 struct server_id server_id,
718 struct winbindd_child *child;
720 DEBUG(10,("winbind_msg_dump_event_list received\n"));
722 dump_event_list(winbind_event_context());
724 for (child = winbindd_children; child != NULL; child = child->next) {
726 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
727 (unsigned int)child->pid));
729 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
736 void winbind_msg_dump_domain_list(struct messaging_context *msg_ctx,
739 struct server_id server_id,
743 const char *message = NULL;
744 struct server_id *sender = NULL;
745 const char *domain = NULL;
748 struct winbindd_domain *dom = NULL;
750 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
752 if (!data || !data->data) {
756 if (data->length < sizeof(struct server_id)) {
760 mem_ctx = talloc_init("winbind_msg_dump_domain_list");
765 sender = (struct server_id *)data->data;
766 if (data->length > sizeof(struct server_id)) {
767 domain = (const char *)data->data+sizeof(struct server_id);
772 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
775 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain,
776 find_domain_from_name_noinit(domain));
778 talloc_destroy(mem_ctx);
782 messaging_send_buf(msg_ctx, *sender,
783 MSG_WINBIND_DUMP_DOMAIN_LIST,
784 (uint8_t *)message, strlen(message) + 1);
786 talloc_destroy(mem_ctx);
791 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
793 for (dom = domain_list(); dom; dom=dom->next) {
794 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain, dom);
796 talloc_destroy(mem_ctx);
800 s = talloc_asprintf_append(s, "%s\n", message);
802 talloc_destroy(mem_ctx);
807 status = messaging_send_buf(msg_ctx, *sender,
808 MSG_WINBIND_DUMP_DOMAIN_LIST,
809 (uint8_t *)s, strlen(s) + 1);
810 if (!NT_STATUS_IS_OK(status)) {
811 DEBUG(0,("failed to send message: %s\n",
815 talloc_destroy(mem_ctx);
818 static void account_lockout_policy_handler(struct event_context *ctx,
819 struct timed_event *te,
823 struct winbindd_child *child =
824 (struct winbindd_child *)private_data;
825 TALLOC_CTX *mem_ctx = NULL;
826 struct winbindd_methods *methods;
827 struct samr_DomInfo12 lockout_policy;
830 DEBUG(10,("account_lockout_policy_handler called\n"));
832 TALLOC_FREE(child->lockout_policy_event);
834 if ( !winbindd_can_contact_domain( child->domain ) ) {
835 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
836 "do not have an incoming trust to domain %s\n",
837 child->domain->name));
842 methods = child->domain->methods;
844 mem_ctx = talloc_init("account_lockout_policy_handler ctx");
846 result = NT_STATUS_NO_MEMORY;
848 result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
850 TALLOC_FREE(mem_ctx);
852 if (!NT_STATUS_IS_OK(result)) {
853 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
857 child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
858 timeval_current_ofs(3600, 0),
859 account_lockout_policy_handler,
863 static time_t get_machine_password_timeout(void)
865 /* until we have gpo support use lp setting */
866 return lp_machine_password_timeout();
869 static bool calculate_next_machine_pwd_change(const char *domain,
872 time_t pass_last_set_time;
878 pw = secrets_fetch_machine_password(domain,
883 DEBUG(0,("cannot fetch own machine password ????"));
889 timeout = get_machine_password_timeout();
891 DEBUG(10,("machine password never expires\n"));
895 tv.tv_sec = pass_last_set_time;
896 DEBUG(10, ("password last changed %s\n",
897 timeval_string(talloc_tos(), &tv, false)));
898 tv.tv_sec += timeout;
899 DEBUGADD(10, ("password valid until %s\n",
900 timeval_string(talloc_tos(), &tv, false)));
902 if (time(NULL) < (pass_last_set_time + timeout)) {
903 next_change = pass_last_set_time + timeout;
904 DEBUG(10,("machine password still valid until: %s\n",
905 http_timestring(talloc_tos(), next_change)));
906 *t = timeval_set(next_change, 0);
908 if (lp_clustering()) {
911 * When having a cluster, we have several
912 * winbinds racing for the password change. In
913 * the machine_password_change_handler()
914 * function we check if someone else was
915 * faster when the event triggers. We add a
916 * 255-second random delay here, so that we
917 * don't run to change the password at the
920 generate_random_buffer(&randbuf, sizeof(randbuf));
921 DEBUG(10, ("adding %d seconds randomness\n",
923 t->tv_sec += randbuf;
928 DEBUG(10,("machine password expired, needs immediate change\n"));
935 static void machine_password_change_handler(struct event_context *ctx,
936 struct timed_event *te,
940 struct winbindd_child *child =
941 (struct winbindd_child *)private_data;
942 struct rpc_pipe_client *netlogon_pipe = NULL;
945 struct timeval next_change;
947 DEBUG(10,("machine_password_change_handler called\n"));
949 TALLOC_FREE(child->machine_password_change_event);
951 if (!calculate_next_machine_pwd_change(child->domain->name,
953 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
957 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
958 timeval_string(talloc_tos(), &next_change, false)));
960 if (!timeval_expired(&next_change)) {
961 DEBUG(10, ("Someone else has already changed the pw\n"));
965 if (!winbindd_can_contact_domain(child->domain)) {
966 DEBUG(10,("machine_password_change_handler: Removing myself since I "
967 "do not have an incoming trust to domain %s\n",
968 child->domain->name));
972 result = cm_connect_netlogon(child->domain, &netlogon_pipe);
973 if (!NT_STATUS_IS_OK(result)) {
974 DEBUG(10,("machine_password_change_handler: "
975 "failed to connect netlogon pipe: %s\n",
980 frame = talloc_stackframe();
982 result = trust_pw_find_change_and_store_it(netlogon_pipe,
984 child->domain->name);
987 DEBUG(10, ("machine_password_change_handler: "
988 "trust_pw_find_change_and_store_it returned %s\n",
991 if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
992 DEBUG(3,("machine_password_change_handler: password set returned "
993 "ACCESS_DENIED. Maybe the trust account "
994 "password was changed and we didn't know it. "
995 "Killing connections to domain %s\n",
996 child->domain->name));
997 TALLOC_FREE(child->domain->conn.netlogon_pipe);
1000 if (!calculate_next_machine_pwd_change(child->domain->name,
1002 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1006 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1007 timeval_string(talloc_tos(), &next_change, false)));
1009 if (!NT_STATUS_IS_OK(result)) {
1012 * In case of failure, give the DC a minute to recover
1014 tmp = timeval_current_ofs(60, 0);
1015 next_change = timeval_max(&next_change, &tmp);
1019 child->machine_password_change_event = event_add_timed(winbind_event_context(), NULL,
1021 machine_password_change_handler,
1025 /* Deal with a request to go offline. */
1027 static void child_msg_offline(struct messaging_context *msg,
1030 struct server_id server_id,
1033 struct winbindd_domain *domain;
1034 struct winbindd_domain *primary_domain = NULL;
1035 const char *domainname = (const char *)data->data;
1037 if (data->data == NULL || data->length == 0) {
1041 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
1043 if (!lp_winbind_offline_logon()) {
1044 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1048 primary_domain = find_our_domain();
1050 /* Mark the requested domain offline. */
1052 for (domain = domain_list(); domain; domain = domain->next) {
1053 if (domain->internal) {
1056 if (strequal(domain->name, domainname)) {
1057 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
1058 set_domain_offline(domain);
1059 /* we are in the trusted domain, set the primary domain
1061 if (domain != primary_domain) {
1062 set_domain_offline(primary_domain);
1068 /* Deal with a request to go online. */
1070 static void child_msg_online(struct messaging_context *msg,
1073 struct server_id server_id,
1076 struct winbindd_domain *domain;
1077 struct winbindd_domain *primary_domain = NULL;
1078 const char *domainname = (const char *)data->data;
1080 if (data->data == NULL || data->length == 0) {
1084 DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
1086 if (!lp_winbind_offline_logon()) {
1087 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1091 primary_domain = find_our_domain();
1093 /* Set our global state as online. */
1094 set_global_winbindd_state_online();
1096 /* Try and mark everything online - delete any negative cache entries
1097 to force a reconnect now. */
1099 for (domain = domain_list(); domain; domain = domain->next) {
1100 if (domain->internal) {
1103 if (strequal(domain->name, domainname)) {
1104 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
1105 winbindd_flush_negative_conn_cache(domain);
1106 set_domain_online_request(domain);
1108 /* we can be in trusted domain, which will contact primary domain
1109 * we have to bring primary domain online in trusted domain process
1110 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1111 * --> contact_domain = find_our_domain()
1113 if (domain != primary_domain) {
1114 winbindd_flush_negative_conn_cache(primary_domain);
1115 set_domain_online_request(primary_domain);
1121 static void child_msg_dump_event_list(struct messaging_context *msg,
1124 struct server_id server_id,
1127 DEBUG(5,("child_msg_dump_event_list received\n"));
1129 dump_event_list(winbind_event_context());
1132 bool winbindd_reinit_after_fork(const char *logfilename)
1134 struct winbindd_domain *domain;
1135 struct winbindd_child *cl;
1138 status = reinit_after_fork(
1139 winbind_messaging_context(),
1140 winbind_event_context(),
1143 if (!NT_STATUS_IS_OK(status)) {
1144 DEBUG(0,("reinit_after_fork() failed\n"));
1148 close_conns_after_fork();
1150 if (!override_logfile && logfilename) {
1151 lp_set_logfile(logfilename);
1155 if (!winbindd_setup_sig_term_handler(false))
1157 if (!winbindd_setup_sig_hup_handler(override_logfile ? NULL :
1161 /* Stop zombies in children */
1164 /* Don't handle the same messages as our parent. */
1165 messaging_deregister(winbind_messaging_context(),
1166 MSG_SMB_CONF_UPDATED, NULL);
1167 messaging_deregister(winbind_messaging_context(),
1168 MSG_SHUTDOWN, NULL);
1169 messaging_deregister(winbind_messaging_context(),
1170 MSG_WINBIND_OFFLINE, NULL);
1171 messaging_deregister(winbind_messaging_context(),
1172 MSG_WINBIND_ONLINE, NULL);
1173 messaging_deregister(winbind_messaging_context(),
1174 MSG_WINBIND_ONLINESTATUS, NULL);
1175 messaging_deregister(winbind_messaging_context(),
1176 MSG_DUMP_EVENT_LIST, NULL);
1177 messaging_deregister(winbind_messaging_context(),
1178 MSG_WINBIND_DUMP_DOMAIN_LIST, NULL);
1179 messaging_deregister(winbind_messaging_context(),
1182 /* We have destroyed all events in the winbindd_event_context
1183 * in reinit_after_fork(), so clean out all possible pending
1184 * event pointers. */
1186 /* Deal with check_online_events. */
1188 for (domain = domain_list(); domain; domain = domain->next) {
1189 TALLOC_FREE(domain->check_online_event);
1192 /* Ensure we're not handling a credential cache event inherited
1193 * from our parent. */
1195 ccache_remove_all_after_fork();
1197 /* Destroy all possible events in child list. */
1198 for (cl = winbindd_children; cl != NULL; cl = cl->next) {
1199 TALLOC_FREE(cl->lockout_policy_event);
1200 TALLOC_FREE(cl->machine_password_change_event);
1202 /* Children should never be able to send
1203 * each other messages, all messages must
1204 * go through the parent.
1209 * This is a little tricky, children must not
1210 * send an MSG_WINBIND_ONLINE message to idmap_child().
1211 * If we are in a child of our primary domain or
1212 * in the process created by fork_child_dc_connect(),
1213 * and the primary domain cannot go online,
1214 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1215 * periodically to idmap_child().
1217 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1218 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1219 * ---> init_dc_connection() ---> cm_open_connection --->
1220 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1221 * idmap_child(). Disallow children sending messages
1222 * to each other, all messages must go through the parent.
1231 * In a child there will be only one domain, reference that here.
1233 static struct winbindd_domain *child_domain;
1235 struct winbindd_domain *wb_child_domain(void)
1237 return child_domain;
1240 static bool fork_domain_child(struct winbindd_child *child)
1243 struct winbindd_cli_state state;
1244 struct winbindd_request request;
1245 struct winbindd_response response;
1246 struct winbindd_domain *primary_domain = NULL;
1248 if (child->domain) {
1249 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1250 child->domain->name));
1252 DEBUG(10, ("fork_domain_child called without domain.\n"));
1255 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
1256 DEBUG(0, ("Could not open child pipe: %s\n",
1262 state.pid = sys_getpid();
1263 state.request = &request;
1264 state.response = &response;
1266 child->pid = sys_fork();
1268 if (child->pid == -1) {
1269 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
1273 if (child->pid != 0) {
1276 child->next = child->prev = NULL;
1277 DLIST_ADD(winbindd_children, child);
1278 child->sock = fdpair[1];
1283 child_domain = child->domain;
1285 DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
1287 state.sock = fdpair[0];
1290 if (!winbindd_reinit_after_fork(child->logfilename)) {
1294 /* Handle online/offline messages. */
1295 messaging_register(winbind_messaging_context(), NULL,
1296 MSG_WINBIND_OFFLINE, child_msg_offline);
1297 messaging_register(winbind_messaging_context(), NULL,
1298 MSG_WINBIND_ONLINE, child_msg_online);
1299 messaging_register(winbind_messaging_context(), NULL,
1300 MSG_DUMP_EVENT_LIST, child_msg_dump_event_list);
1301 messaging_register(winbind_messaging_context(), NULL,
1302 MSG_DEBUG, debug_message);
1303 messaging_register(winbind_messaging_context(), NULL,
1304 MSG_WINBIND_IP_DROPPED,
1305 winbind_msg_ip_dropped);
1308 primary_domain = find_our_domain();
1310 if (primary_domain == NULL) {
1311 smb_panic("no primary domain found");
1314 /* It doesn't matter if we allow cache login,
1315 * try to bring domain online after fork. */
1316 if ( child->domain ) {
1317 child->domain->startup = True;
1318 child->domain->startup_time = time_mono(NULL);
1319 /* we can be in primary domain or in trusted domain
1320 * If we are in trusted domain, set the primary domain
1321 * in start-up mode */
1322 if (!(child->domain->internal)) {
1323 set_domain_online_request(child->domain);
1324 if (!(child->domain->primary)) {
1325 primary_domain->startup = True;
1326 primary_domain->startup_time = time_mono(NULL);
1327 set_domain_online_request(primary_domain);
1333 * We are in idmap child, make sure that we set the
1334 * check_online_event to bring primary domain online.
1336 if (child == idmap_child()) {
1337 set_domain_online_request(primary_domain);
1340 /* We might be in the idmap child...*/
1341 if (child->domain && !(child->domain->internal) &&
1342 lp_winbind_offline_logon()) {
1344 set_domain_online_request(child->domain);
1346 if (primary_domain && (primary_domain != child->domain)) {
1347 /* We need to talk to the primary
1348 * domain as well as the trusted
1349 * domain inside a trusted domain
1352 * set_dc_type_and_flags_trustinfo()
1355 set_domain_online_request(primary_domain);
1358 child->lockout_policy_event = event_add_timed(
1359 winbind_event_context(), NULL, timeval_zero(),
1360 account_lockout_policy_handler,
1364 if (child->domain && child->domain->primary &&
1365 !USE_KERBEROS_KEYTAB &&
1366 lp_server_role() == ROLE_DOMAIN_MEMBER) {
1368 struct timeval next_change;
1370 if (calculate_next_machine_pwd_change(child->domain->name,
1372 child->machine_password_change_event = event_add_timed(
1373 winbind_event_context(), NULL, next_change,
1374 machine_password_change_handler,
1387 TALLOC_CTX *frame = talloc_stackframe();
1388 struct iovec iov[2];
1392 if (run_events(winbind_event_context(), &ret, NULL, NULL)) {
1397 if (child->domain && child->domain->startup &&
1398 (time_mono(NULL) > child->domain->startup_time + 30)) {
1399 /* No longer in "startup" mode. */
1400 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1401 child->domain->name ));
1402 child->domain->startup = False;
1407 FD_SET(state.sock, &r_fds);
1411 * Initialize this high as event_add_to_select_args()
1412 * uses a timeval_min() on this and next_event. Fix
1413 * from Roel van Meer <rolek@alt001.com>.
1418 event_add_to_select_args(winbind_event_context(),
1419 &r_fds, &w_fds, &t, &maxfd);
1420 tp = get_timed_events_timeout(winbind_event_context(), &t);
1422 DEBUG(11,("select will use timeout of %u.%u seconds\n",
1423 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
1426 ret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, tp);
1428 if (run_events(winbind_event_context(), &ret, &r_fds, &w_fds)) {
1429 /* We got a signal - continue. */
1435 DEBUG(11,("nothing is ready yet, continue\n"));
1440 if (ret == -1 && errno == EINTR) {
1441 /* We got a signal - continue. */
1446 if (ret == -1 && errno != EINTR) {
1447 DEBUG(0,("select error occured\n"));
1453 /* fetch a request from the main daemon */
1454 status = child_read_request(&state);
1456 if (!NT_STATUS_IS_OK(status)) {
1457 /* we lost contact with our parent */
1461 DEBUG(4,("child daemon request %d\n", (int)state.request->cmd));
1463 ZERO_STRUCTP(state.response);
1464 state.request->null_term = '\0';
1465 state.mem_ctx = frame;
1466 child_process_request(child, &state);
1468 DEBUG(4, ("Finished processing child request %d\n",
1469 (int)state.request->cmd));
1471 SAFE_FREE(state.request->extra_data.data);
1473 iov[0].iov_base = (void *)state.response;
1474 iov[0].iov_len = sizeof(struct winbindd_response);
1477 if (state.response->length > sizeof(struct winbindd_response)) {
1479 (void *)state.response->extra_data.data;
1480 iov[1].iov_len = state.response->length-iov[0].iov_len;
1484 DEBUG(10, ("Writing %d bytes to parent\n",
1485 (int)state.response->length));
1487 if (write_data_iov(state.sock, iov, iov_count) !=
1488 state.response->length) {
1489 DEBUG(0, ("Could not write result\n"));
1496 void winbind_msg_ip_dropped_parent(struct messaging_context *msg_ctx,
1499 struct server_id server_id,
1502 struct winbindd_child *child;
1504 winbind_msg_ip_dropped(msg_ctx, private_data, msg_type,
1508 for (child = winbindd_children; child != NULL; child = child->next) {
1509 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
1510 msg_type, data->data, data->length);