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"
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 static bool winbindd_child_busy(struct winbindd_child *child)
198 return tevent_queue_length(child->queue) > 0;
201 static struct winbindd_child *find_idle_child(struct winbindd_domain *domain)
205 for (i=0; i<lp_winbind_max_domain_connections(); i++) {
206 if (!winbindd_child_busy(&domain->children[i])) {
207 return &domain->children[i];
214 struct winbindd_child *choose_domain_child(struct winbindd_domain *domain)
216 struct winbindd_child *result;
218 result = find_idle_child(domain);
219 if (result != NULL) {
222 return &domain->children[rand() % lp_winbind_max_domain_connections()];
225 struct dcerpc_binding_handle *dom_child_handle(struct winbindd_domain *domain)
227 struct winbindd_child *child;
229 child = choose_domain_child(domain);
230 return child->binding_handle;
233 struct wb_domain_request_state {
234 struct tevent_context *ev;
235 struct winbindd_domain *domain;
236 struct winbindd_child *child;
237 struct winbindd_request *request;
238 struct winbindd_request *init_req;
239 struct winbindd_response *response;
242 static void wb_domain_request_gotdc(struct tevent_req *subreq);
243 static void wb_domain_request_initialized(struct tevent_req *subreq);
244 static void wb_domain_request_done(struct tevent_req *subreq);
246 struct tevent_req *wb_domain_request_send(TALLOC_CTX *mem_ctx,
247 struct tevent_context *ev,
248 struct winbindd_domain *domain,
249 struct winbindd_request *request)
251 struct tevent_req *req, *subreq;
252 struct wb_domain_request_state *state;
254 req = tevent_req_create(mem_ctx, &state,
255 struct wb_domain_request_state);
260 state->child = choose_domain_child(domain);
262 if (domain->initialized) {
263 subreq = wb_child_request_send(state, ev, state->child,
265 if (tevent_req_nomem(subreq, req)) {
266 return tevent_req_post(req, ev);
268 tevent_req_set_callback(subreq, wb_domain_request_done, req);
272 state->domain = domain;
274 state->request = request;
276 state->init_req = talloc_zero(state, struct winbindd_request);
277 if (tevent_req_nomem(state->init_req, req)) {
278 return tevent_req_post(req, ev);
281 if (IS_DC || domain->primary || domain->internal) {
282 /* The primary domain has to find the DC name itself */
283 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
284 fstrcpy(state->init_req->domain_name, domain->name);
285 state->init_req->data.init_conn.is_primary = domain->primary;
286 fstrcpy(state->init_req->data.init_conn.dcname, "");
288 subreq = wb_child_request_send(state, ev, state->child,
290 if (tevent_req_nomem(subreq, req)) {
291 return tevent_req_post(req, ev);
293 tevent_req_set_callback(subreq, wb_domain_request_initialized,
299 * Ask our DC for a DC name
301 domain = find_our_domain();
303 /* This is *not* the primary domain, let's ask our DC about a DC
306 state->init_req->cmd = WINBINDD_GETDCNAME;
307 fstrcpy(state->init_req->domain_name, domain->name);
309 subreq = wb_child_request_send(state, ev, state->child, request);
310 if (tevent_req_nomem(subreq, req)) {
311 return tevent_req_post(req, ev);
313 tevent_req_set_callback(subreq, wb_domain_request_gotdc, req);
317 static void wb_domain_request_gotdc(struct tevent_req *subreq)
319 struct tevent_req *req = tevent_req_callback_data(
320 subreq, struct tevent_req);
321 struct wb_domain_request_state *state = tevent_req_data(
322 req, struct wb_domain_request_state);
323 struct winbindd_response *response;
326 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
329 tevent_req_error(req, err);
332 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
333 fstrcpy(state->init_req->domain_name, state->domain->name);
334 state->init_req->data.init_conn.is_primary = False;
335 fstrcpy(state->init_req->data.init_conn.dcname,
336 response->data.dc_name);
338 TALLOC_FREE(response);
340 subreq = wb_child_request_send(state, state->ev, state->child,
342 if (tevent_req_nomem(subreq, req)) {
345 tevent_req_set_callback(subreq, wb_domain_request_initialized, req);
348 static void wb_domain_request_initialized(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);
354 struct winbindd_response *response;
357 ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
360 tevent_req_error(req, err);
364 if (!string_to_sid(&state->domain->sid,
365 response->data.domain_info.sid)) {
366 DEBUG(1,("init_child_recv: Could not convert sid %s "
367 "from string\n", response->data.domain_info.sid));
368 tevent_req_error(req, EINVAL);
371 fstrcpy(state->domain->name, response->data.domain_info.name);
372 fstrcpy(state->domain->alt_name, response->data.domain_info.alt_name);
373 state->domain->native_mode = response->data.domain_info.native_mode;
374 state->domain->active_directory =
375 response->data.domain_info.active_directory;
376 state->domain->initialized = true;
378 TALLOC_FREE(response);
380 subreq = wb_child_request_send(state, state->ev, state->child,
382 if (tevent_req_nomem(subreq, req)) {
385 tevent_req_set_callback(subreq, wb_domain_request_done, req);
388 static void wb_domain_request_done(struct tevent_req *subreq)
390 struct tevent_req *req = tevent_req_callback_data(
391 subreq, struct tevent_req);
392 struct wb_domain_request_state *state = tevent_req_data(
393 req, struct wb_domain_request_state);
396 ret = wb_child_request_recv(subreq, talloc_tos(), &state->response,
400 tevent_req_error(req, err);
403 tevent_req_done(req);
406 int wb_domain_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
407 struct winbindd_response **presponse, int *err)
409 struct wb_domain_request_state *state = tevent_req_data(
410 req, struct wb_domain_request_state);
412 if (tevent_req_is_unix_error(req, err)) {
415 *presponse = talloc_move(mem_ctx, &state->response);
419 static void child_process_request(struct winbindd_child *child,
420 struct winbindd_cli_state *state)
422 struct winbindd_domain *domain = child->domain;
423 const struct winbindd_child_dispatch_table *table = child->table;
425 /* Free response data - we may be interrupted and receive another
426 command before being able to send this data off. */
428 state->response->result = WINBINDD_ERROR;
429 state->response->length = sizeof(struct winbindd_response);
431 /* as all requests in the child are sync, we can use talloc_tos() */
432 state->mem_ctx = talloc_tos();
434 /* Process command */
436 for (; table->name; table++) {
437 if (state->request->cmd == table->struct_cmd) {
438 DEBUG(10,("child_process_request: request fn %s\n",
440 state->response->result = table->struct_fn(domain, state);
445 DEBUG(1, ("child_process_request: unknown request fn number %d\n",
446 (int)state->request->cmd));
447 state->response->result = WINBINDD_ERROR;
450 void setup_child(struct winbindd_domain *domain, struct winbindd_child *child,
451 const struct winbindd_child_dispatch_table *table,
452 const char *logprefix,
455 if (logprefix && logname) {
456 char *logbase = NULL;
461 if (asprintf(&logbase, "%s", lp_logfile()) < 0) {
462 smb_panic("Internal error: asprintf failed");
465 if ((end = strrchr_m(logbase, '/'))) {
469 if (asprintf(&logbase, "%s", get_dyn_LOGFILEBASE()) < 0) {
470 smb_panic("Internal error: asprintf failed");
474 if (asprintf(&child->logfilename, "%s/%s-%s",
475 logbase, logprefix, logname) < 0) {
477 smb_panic("Internal error: asprintf failed");
482 smb_panic("Internal error: logprefix == NULL && "
487 child->domain = domain;
488 child->table = table;
489 child->queue = tevent_queue_create(NULL, "winbind_child");
490 SMB_ASSERT(child->queue != NULL);
491 child->binding_handle = wbint_binding_handle(NULL, domain, child);
492 SMB_ASSERT(child->binding_handle != NULL);
495 static struct winbindd_child *winbindd_children = NULL;
497 void winbind_child_died(pid_t pid)
499 struct winbindd_child *child;
501 for (child = winbindd_children; child != NULL; child = child->next) {
502 if (child->pid == pid) {
508 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
512 /* This will be re-added in fork_domain_child() */
514 DLIST_REMOVE(winbindd_children, child);
518 /* Ensure any negative cache entries with the netbios or realm names are removed. */
520 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
522 flush_negative_conn_cache_for_domain(domain->name);
523 if (*domain->alt_name) {
524 flush_negative_conn_cache_for_domain(domain->alt_name);
529 * Parent winbindd process sets its own debug level first and then
530 * sends a message to all the winbindd children to adjust their debug
531 * level to that of parents.
534 void winbind_msg_debug(struct messaging_context *msg_ctx,
537 struct server_id server_id,
540 struct winbindd_child *child;
542 DEBUG(10,("winbind_msg_debug: got debug message.\n"));
544 debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
546 for (child = winbindd_children; child != NULL; child = child->next) {
548 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
549 (unsigned int)child->pid));
551 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
554 strlen((char *) data->data) + 1);
558 /* Set our domains as offline and forward the offline message to our children. */
560 void winbind_msg_offline(struct messaging_context *msg_ctx,
563 struct server_id server_id,
566 struct winbindd_child *child;
567 struct winbindd_domain *domain;
569 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
571 if (!lp_winbind_offline_logon()) {
572 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
576 /* Set our global state as offline. */
577 if (!set_global_winbindd_state_offline()) {
578 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
582 /* Set all our domains as offline. */
583 for (domain = domain_list(); domain; domain = domain->next) {
584 if (domain->internal) {
587 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
588 set_domain_offline(domain);
591 for (child = winbindd_children; child != NULL; child = child->next) {
592 /* Don't send message to internal children. We've already
594 if (!child->domain || winbindd_internal_child(child)) {
598 /* Or internal domains (this should not be possible....) */
599 if (child->domain->internal) {
603 /* Each winbindd child should only process requests for one domain - make sure
604 we only set it online / offline for that domain. */
606 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
607 (unsigned int)child->pid, domain->name ));
609 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
611 (uint8 *)child->domain->name,
612 strlen(child->domain->name)+1);
616 /* Set our domains as online and forward the online message to our children. */
618 void winbind_msg_online(struct messaging_context *msg_ctx,
621 struct server_id server_id,
624 struct winbindd_child *child;
625 struct winbindd_domain *domain;
627 DEBUG(10,("winbind_msg_online: got online message.\n"));
629 if (!lp_winbind_offline_logon()) {
630 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
634 /* Set our global state as online. */
635 set_global_winbindd_state_online();
637 smb_nscd_flush_user_cache();
638 smb_nscd_flush_group_cache();
640 /* Set all our domains as online. */
641 for (domain = domain_list(); domain; domain = domain->next) {
642 if (domain->internal) {
645 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
647 winbindd_flush_negative_conn_cache(domain);
648 set_domain_online_request(domain);
650 /* Send an online message to the idmap child when our
651 primary domain comes back online */
653 if ( domain->primary ) {
654 struct winbindd_child *idmap = idmap_child();
656 if ( idmap->pid != 0 ) {
657 messaging_send_buf(msg_ctx,
658 pid_to_procid(idmap->pid),
660 (uint8 *)domain->name,
661 strlen(domain->name)+1);
666 for (child = winbindd_children; child != NULL; child = child->next) {
667 /* Don't send message to internal childs. */
668 if (!child->domain || winbindd_internal_child(child)) {
672 /* Or internal domains (this should not be possible....) */
673 if (child->domain->internal) {
677 /* Each winbindd child should only process requests for one domain - make sure
678 we only set it online / offline for that domain. */
680 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
681 (unsigned int)child->pid, child->domain->name ));
683 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
685 (uint8 *)child->domain->name,
686 strlen(child->domain->name)+1);
690 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
692 struct winbindd_domain *domain;
695 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
696 get_global_winbindd_state_offline() ?
697 "Offline":"Online")) == NULL) {
701 for (domain = domain_list(); domain; domain = domain->next) {
702 if ((buf = talloc_asprintf_append_buffer(buf, "%s:%s ",
705 "Online":"Offline")) == NULL) {
710 buf = talloc_asprintf_append_buffer(buf, "\n");
712 DEBUG(5,("collect_onlinestatus: %s", buf));
717 void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
720 struct server_id server_id,
725 struct server_id *sender;
727 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
733 sender = (struct server_id *)data->data;
735 mem_ctx = talloc_init("winbind_msg_onlinestatus");
736 if (mem_ctx == NULL) {
740 message = collect_onlinestatus(mem_ctx);
741 if (message == NULL) {
742 talloc_destroy(mem_ctx);
746 messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
747 (uint8 *)message, strlen(message) + 1);
749 talloc_destroy(mem_ctx);
752 void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
755 struct server_id server_id,
758 struct winbindd_child *child;
760 DEBUG(10,("winbind_msg_dump_event_list received\n"));
762 dump_event_list(winbind_event_context());
764 for (child = winbindd_children; child != NULL; child = child->next) {
766 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
767 (unsigned int)child->pid));
769 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
776 void winbind_msg_dump_domain_list(struct messaging_context *msg_ctx,
779 struct server_id server_id,
783 const char *message = NULL;
784 struct server_id *sender = NULL;
785 const char *domain = NULL;
788 struct winbindd_domain *dom = NULL;
790 DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
792 if (!data || !data->data) {
796 if (data->length < sizeof(struct server_id)) {
800 mem_ctx = talloc_init("winbind_msg_dump_domain_list");
805 sender = (struct server_id *)data->data;
806 if (data->length > sizeof(struct server_id)) {
807 domain = (const char *)data->data+sizeof(struct server_id);
812 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
815 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain,
816 find_domain_from_name_noinit(domain));
818 talloc_destroy(mem_ctx);
822 messaging_send_buf(msg_ctx, *sender,
823 MSG_WINBIND_DUMP_DOMAIN_LIST,
824 (uint8_t *)message, strlen(message) + 1);
826 talloc_destroy(mem_ctx);
831 DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
833 for (dom = domain_list(); dom; dom=dom->next) {
834 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain, dom);
836 talloc_destroy(mem_ctx);
840 s = talloc_asprintf_append(s, "%s\n", message);
842 talloc_destroy(mem_ctx);
847 status = messaging_send_buf(msg_ctx, *sender,
848 MSG_WINBIND_DUMP_DOMAIN_LIST,
849 (uint8_t *)s, strlen(s) + 1);
850 if (!NT_STATUS_IS_OK(status)) {
851 DEBUG(0,("failed to send message: %s\n",
855 talloc_destroy(mem_ctx);
858 static void account_lockout_policy_handler(struct event_context *ctx,
859 struct timed_event *te,
863 struct winbindd_child *child =
864 (struct winbindd_child *)private_data;
865 TALLOC_CTX *mem_ctx = NULL;
866 struct winbindd_methods *methods;
867 struct samr_DomInfo12 lockout_policy;
870 DEBUG(10,("account_lockout_policy_handler called\n"));
872 TALLOC_FREE(child->lockout_policy_event);
874 if ( !winbindd_can_contact_domain( child->domain ) ) {
875 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
876 "do not have an incoming trust to domain %s\n",
877 child->domain->name));
882 methods = child->domain->methods;
884 mem_ctx = talloc_init("account_lockout_policy_handler ctx");
886 result = NT_STATUS_NO_MEMORY;
888 result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
890 TALLOC_FREE(mem_ctx);
892 if (!NT_STATUS_IS_OK(result)) {
893 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
897 child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
898 timeval_current_ofs(3600, 0),
899 account_lockout_policy_handler,
903 static time_t get_machine_password_timeout(void)
905 /* until we have gpo support use lp setting */
906 return lp_machine_password_timeout();
909 static bool calculate_next_machine_pwd_change(const char *domain,
912 time_t pass_last_set_time;
918 pw = secrets_fetch_machine_password(domain,
923 DEBUG(0,("cannot fetch own machine password ????"));
929 timeout = get_machine_password_timeout();
931 DEBUG(10,("machine password never expires\n"));
935 tv.tv_sec = pass_last_set_time;
936 DEBUG(10, ("password last changed %s\n",
937 timeval_string(talloc_tos(), &tv, false)));
938 tv.tv_sec += timeout;
939 DEBUGADD(10, ("password valid until %s\n",
940 timeval_string(talloc_tos(), &tv, false)));
942 if (time(NULL) < (pass_last_set_time + timeout)) {
943 next_change = pass_last_set_time + timeout;
944 DEBUG(10,("machine password still valid until: %s\n",
945 http_timestring(talloc_tos(), next_change)));
946 *t = timeval_set(next_change, 0);
948 if (lp_clustering()) {
951 * When having a cluster, we have several
952 * winbinds racing for the password change. In
953 * the machine_password_change_handler()
954 * function we check if someone else was
955 * faster when the event triggers. We add a
956 * 255-second random delay here, so that we
957 * don't run to change the password at the
960 generate_random_buffer(&randbuf, sizeof(randbuf));
961 DEBUG(10, ("adding %d seconds randomness\n",
963 t->tv_sec += randbuf;
968 DEBUG(10,("machine password expired, needs immediate change\n"));
975 static void machine_password_change_handler(struct event_context *ctx,
976 struct timed_event *te,
980 struct winbindd_child *child =
981 (struct winbindd_child *)private_data;
982 struct rpc_pipe_client *netlogon_pipe = NULL;
985 struct timeval next_change;
987 DEBUG(10,("machine_password_change_handler called\n"));
989 TALLOC_FREE(child->machine_password_change_event);
991 if (!calculate_next_machine_pwd_change(child->domain->name,
993 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
997 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
998 timeval_string(talloc_tos(), &next_change, false)));
1000 if (!timeval_expired(&next_change)) {
1001 DEBUG(10, ("Someone else has already changed the pw\n"));
1005 if (!winbindd_can_contact_domain(child->domain)) {
1006 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1007 "do not have an incoming trust to domain %s\n",
1008 child->domain->name));
1012 result = cm_connect_netlogon(child->domain, &netlogon_pipe);
1013 if (!NT_STATUS_IS_OK(result)) {
1014 DEBUG(10,("machine_password_change_handler: "
1015 "failed to connect netlogon pipe: %s\n",
1016 nt_errstr(result)));
1020 frame = talloc_stackframe();
1022 result = trust_pw_find_change_and_store_it(netlogon_pipe,
1024 child->domain->name);
1027 DEBUG(10, ("machine_password_change_handler: "
1028 "trust_pw_find_change_and_store_it returned %s\n",
1029 nt_errstr(result)));
1031 if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1032 DEBUG(3,("machine_password_change_handler: password set returned "
1033 "ACCESS_DENIED. Maybe the trust account "
1034 "password was changed and we didn't know it. "
1035 "Killing connections to domain %s\n",
1036 child->domain->name));
1037 TALLOC_FREE(child->domain->conn.netlogon_pipe);
1040 if (!calculate_next_machine_pwd_change(child->domain->name,
1042 DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
1046 DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
1047 timeval_string(talloc_tos(), &next_change, false)));
1049 if (!NT_STATUS_IS_OK(result)) {
1052 * In case of failure, give the DC a minute to recover
1054 tmp = timeval_current_ofs(60, 0);
1055 next_change = timeval_max(&next_change, &tmp);
1059 child->machine_password_change_event = event_add_timed(winbind_event_context(), NULL,
1061 machine_password_change_handler,
1065 /* Deal with a request to go offline. */
1067 static void child_msg_offline(struct messaging_context *msg,
1070 struct server_id server_id,
1073 struct winbindd_domain *domain;
1074 struct winbindd_domain *primary_domain = NULL;
1075 const char *domainname = (const char *)data->data;
1077 if (data->data == NULL || data->length == 0) {
1081 DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
1083 if (!lp_winbind_offline_logon()) {
1084 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1088 primary_domain = find_our_domain();
1090 /* Mark the requested domain offline. */
1092 for (domain = domain_list(); domain; domain = domain->next) {
1093 if (domain->internal) {
1096 if (strequal(domain->name, domainname)) {
1097 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
1098 set_domain_offline(domain);
1099 /* we are in the trusted domain, set the primary domain
1101 if (domain != primary_domain) {
1102 set_domain_offline(primary_domain);
1108 /* Deal with a request to go online. */
1110 static void child_msg_online(struct messaging_context *msg,
1113 struct server_id server_id,
1116 struct winbindd_domain *domain;
1117 struct winbindd_domain *primary_domain = NULL;
1118 const char *domainname = (const char *)data->data;
1120 if (data->data == NULL || data->length == 0) {
1124 DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
1126 if (!lp_winbind_offline_logon()) {
1127 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1131 primary_domain = find_our_domain();
1133 /* Set our global state as online. */
1134 set_global_winbindd_state_online();
1136 /* Try and mark everything online - delete any negative cache entries
1137 to force a reconnect now. */
1139 for (domain = domain_list(); domain; domain = domain->next) {
1140 if (domain->internal) {
1143 if (strequal(domain->name, domainname)) {
1144 DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
1145 winbindd_flush_negative_conn_cache(domain);
1146 set_domain_online_request(domain);
1148 /* we can be in trusted domain, which will contact primary domain
1149 * we have to bring primary domain online in trusted domain process
1150 * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1151 * --> contact_domain = find_our_domain()
1153 if (domain != primary_domain) {
1154 winbindd_flush_negative_conn_cache(primary_domain);
1155 set_domain_online_request(primary_domain);
1161 static void child_msg_dump_event_list(struct messaging_context *msg,
1164 struct server_id server_id,
1167 DEBUG(5,("child_msg_dump_event_list received\n"));
1169 dump_event_list(winbind_event_context());
1172 bool winbindd_reinit_after_fork(const char *logfilename)
1174 struct winbindd_domain *domain;
1175 struct winbindd_child *cl;
1178 status = reinit_after_fork(
1179 winbind_messaging_context(),
1180 winbind_event_context(),
1183 if (!NT_STATUS_IS_OK(status)) {
1184 DEBUG(0,("reinit_after_fork() failed\n"));
1188 close_conns_after_fork();
1190 if (!override_logfile && logfilename) {
1191 lp_set_logfile(logfilename);
1195 if (!winbindd_setup_sig_term_handler(false))
1197 if (!winbindd_setup_sig_hup_handler(override_logfile ? NULL :
1201 /* Stop zombies in children */
1204 /* Don't handle the same messages as our parent. */
1205 messaging_deregister(winbind_messaging_context(),
1206 MSG_SMB_CONF_UPDATED, NULL);
1207 messaging_deregister(winbind_messaging_context(),
1208 MSG_SHUTDOWN, NULL);
1209 messaging_deregister(winbind_messaging_context(),
1210 MSG_WINBIND_OFFLINE, NULL);
1211 messaging_deregister(winbind_messaging_context(),
1212 MSG_WINBIND_ONLINE, NULL);
1213 messaging_deregister(winbind_messaging_context(),
1214 MSG_WINBIND_ONLINESTATUS, NULL);
1215 messaging_deregister(winbind_messaging_context(),
1216 MSG_DUMP_EVENT_LIST, NULL);
1217 messaging_deregister(winbind_messaging_context(),
1218 MSG_WINBIND_DUMP_DOMAIN_LIST, NULL);
1219 messaging_deregister(winbind_messaging_context(),
1222 /* We have destroyed all events in the winbindd_event_context
1223 * in reinit_after_fork(), so clean out all possible pending
1224 * event pointers. */
1226 /* Deal with check_online_events. */
1228 for (domain = domain_list(); domain; domain = domain->next) {
1229 TALLOC_FREE(domain->check_online_event);
1232 /* Ensure we're not handling a credential cache event inherited
1233 * from our parent. */
1235 ccache_remove_all_after_fork();
1237 /* Destroy all possible events in child list. */
1238 for (cl = winbindd_children; cl != NULL; cl = cl->next) {
1239 TALLOC_FREE(cl->lockout_policy_event);
1240 TALLOC_FREE(cl->machine_password_change_event);
1242 /* Children should never be able to send
1243 * each other messages, all messages must
1244 * go through the parent.
1249 * This is a little tricky, children must not
1250 * send an MSG_WINBIND_ONLINE message to idmap_child().
1251 * If we are in a child of our primary domain or
1252 * in the process created by fork_child_dc_connect(),
1253 * and the primary domain cannot go online,
1254 * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1255 * periodically to idmap_child().
1257 * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1258 * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1259 * ---> init_dc_connection() ---> cm_open_connection --->
1260 * set_domain_online(), sends MSG_WINBIND_ONLINE to
1261 * idmap_child(). Disallow children sending messages
1262 * to each other, all messages must go through the parent.
1271 * In a child there will be only one domain, reference that here.
1273 static struct winbindd_domain *child_domain;
1275 struct winbindd_domain *wb_child_domain(void)
1277 return child_domain;
1280 static bool fork_domain_child(struct winbindd_child *child)
1283 struct winbindd_cli_state state;
1284 struct winbindd_request request;
1285 struct winbindd_response response;
1286 struct winbindd_domain *primary_domain = NULL;
1288 if (child->domain) {
1289 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1290 child->domain->name));
1292 DEBUG(10, ("fork_domain_child called without domain.\n"));
1295 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
1296 DEBUG(0, ("Could not open child pipe: %s\n",
1302 state.pid = sys_getpid();
1303 state.request = &request;
1304 state.response = &response;
1306 child->pid = sys_fork();
1308 if (child->pid == -1) {
1309 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
1313 if (child->pid != 0) {
1316 child->next = child->prev = NULL;
1317 DLIST_ADD(winbindd_children, child);
1318 child->sock = fdpair[1];
1323 child_domain = child->domain;
1325 DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
1327 state.sock = fdpair[0];
1330 if (!winbindd_reinit_after_fork(child->logfilename)) {
1334 /* Handle online/offline messages. */
1335 messaging_register(winbind_messaging_context(), NULL,
1336 MSG_WINBIND_OFFLINE, child_msg_offline);
1337 messaging_register(winbind_messaging_context(), NULL,
1338 MSG_WINBIND_ONLINE, child_msg_online);
1339 messaging_register(winbind_messaging_context(), NULL,
1340 MSG_DUMP_EVENT_LIST, child_msg_dump_event_list);
1341 messaging_register(winbind_messaging_context(), NULL,
1342 MSG_DEBUG, debug_message);
1343 messaging_register(winbind_messaging_context(), NULL,
1344 MSG_WINBIND_IP_DROPPED,
1345 winbind_msg_ip_dropped);
1348 primary_domain = find_our_domain();
1350 if (primary_domain == NULL) {
1351 smb_panic("no primary domain found");
1354 /* It doesn't matter if we allow cache login,
1355 * try to bring domain online after fork. */
1356 if ( child->domain ) {
1357 child->domain->startup = True;
1358 child->domain->startup_time = time_mono(NULL);
1359 /* we can be in primary domain or in trusted domain
1360 * If we are in trusted domain, set the primary domain
1361 * in start-up mode */
1362 if (!(child->domain->internal)) {
1363 set_domain_online_request(child->domain);
1364 if (!(child->domain->primary)) {
1365 primary_domain->startup = True;
1366 primary_domain->startup_time = time_mono(NULL);
1367 set_domain_online_request(primary_domain);
1373 * We are in idmap child, make sure that we set the
1374 * check_online_event to bring primary domain online.
1376 if (child == idmap_child()) {
1377 set_domain_online_request(primary_domain);
1380 /* We might be in the idmap child...*/
1381 if (child->domain && !(child->domain->internal) &&
1382 lp_winbind_offline_logon()) {
1384 set_domain_online_request(child->domain);
1386 if (primary_domain && (primary_domain != child->domain)) {
1387 /* We need to talk to the primary
1388 * domain as well as the trusted
1389 * domain inside a trusted domain
1392 * set_dc_type_and_flags_trustinfo()
1395 set_domain_online_request(primary_domain);
1398 child->lockout_policy_event = event_add_timed(
1399 winbind_event_context(), NULL, timeval_zero(),
1400 account_lockout_policy_handler,
1404 if (child->domain && child->domain->primary &&
1405 !USE_KERBEROS_KEYTAB &&
1406 lp_server_role() == ROLE_DOMAIN_MEMBER) {
1408 struct timeval next_change;
1410 if (calculate_next_machine_pwd_change(child->domain->name,
1412 child->machine_password_change_event = event_add_timed(
1413 winbind_event_context(), NULL, next_change,
1414 machine_password_change_handler,
1427 TALLOC_CTX *frame = talloc_stackframe();
1428 struct iovec iov[2];
1432 if (run_events(winbind_event_context(), 0, NULL, NULL)) {
1437 if (child->domain && child->domain->startup &&
1438 (time_mono(NULL) > child->domain->startup_time + 30)) {
1439 /* No longer in "startup" mode. */
1440 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1441 child->domain->name ));
1442 child->domain->startup = False;
1447 FD_SET(state.sock, &r_fds);
1451 * Initialize this high as event_add_to_select_args()
1452 * uses a timeval_min() on this and next_event. Fix
1453 * from Roel van Meer <rolek@alt001.com>.
1458 event_add_to_select_args(winbind_event_context(),
1459 &r_fds, &w_fds, &t, &maxfd);
1460 tp = get_timed_events_timeout(winbind_event_context(), &t);
1462 DEBUG(11,("select will use timeout of %u.%u seconds\n",
1463 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
1466 ret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, tp);
1468 if (run_events(winbind_event_context(), ret, &r_fds, &w_fds)) {
1469 /* We got a signal - continue. */
1475 DEBUG(11,("nothing is ready yet, continue\n"));
1480 if (ret == -1 && errno == EINTR) {
1481 /* We got a signal - continue. */
1486 if (ret == -1 && errno != EINTR) {
1487 DEBUG(0,("select error occured\n"));
1493 /* fetch a request from the main daemon */
1494 status = child_read_request(&state);
1496 if (!NT_STATUS_IS_OK(status)) {
1497 /* we lost contact with our parent */
1501 DEBUG(4,("child daemon request %d\n", (int)state.request->cmd));
1503 ZERO_STRUCTP(state.response);
1504 state.request->null_term = '\0';
1505 state.mem_ctx = frame;
1506 child_process_request(child, &state);
1508 DEBUG(4, ("Finished processing child request %d\n",
1509 (int)state.request->cmd));
1511 SAFE_FREE(state.request->extra_data.data);
1513 iov[0].iov_base = (void *)state.response;
1514 iov[0].iov_len = sizeof(struct winbindd_response);
1517 if (state.response->length > sizeof(struct winbindd_response)) {
1519 (void *)state.response->extra_data.data;
1520 iov[1].iov_len = state.response->length-iov[0].iov_len;
1524 DEBUG(10, ("Writing %d bytes to parent\n",
1525 (int)state.response->length));
1527 if (write_data_iov(state.sock, iov, iov_count) !=
1528 state.response->length) {
1529 DEBUG(0, ("Could not write result\n"));
1536 void winbind_msg_ip_dropped_parent(struct messaging_context *msg_ctx,
1539 struct server_id server_id,
1542 struct winbindd_child *child;
1544 winbind_msg_ip_dropped(msg_ctx, private_data, msg_type,
1548 for (child = winbindd_children; child != NULL; child = child->next) {
1549 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
1550 msg_type, data->data, data->length);