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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 * We fork a child per domain to be able to act non-blocking in the main
26 * winbind daemon. A domain controller thousands of miles away being being
27 * slow replying with a 10.000 user list should not hold up netlogon calls
28 * that can be handled locally.
35 #define DBGC_CLASS DBGC_WINBIND
37 /* Read some data from a client connection */
39 static void child_read_request(struct winbindd_cli_state *state)
45 len = read_data(state->sock, (char *)&state->request,
46 sizeof(state->request));
48 if (len != sizeof(state->request)) {
49 DEBUG(len > 0 ? 0 : 3, ("Got invalid request length: %d\n", (int)len));
50 state->finished = True;
54 if (state->request.extra_len == 0) {
55 state->request.extra_data.data = NULL;
59 DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request.extra_len));
61 state->request.extra_data.data =
62 SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
64 if (state->request.extra_data.data == NULL) {
65 DEBUG(0, ("malloc failed\n"));
66 state->finished = True;
70 /* Ensure null termination */
71 state->request.extra_data.data[state->request.extra_len] = '\0';
73 len = read_data(state->sock, state->request.extra_data.data,
74 state->request.extra_len);
76 if (len != state->request.extra_len) {
77 DEBUG(0, ("Could not read extra data\n"));
78 state->finished = True;
84 * Machinery for async requests sent to children. You set up a
85 * winbindd_request, select a child to query, and issue a async_request
86 * call. When the request is completed, the callback function you specified is
87 * called back with the private pointer you gave to async_request.
90 struct winbindd_async_request {
91 struct winbindd_async_request *next, *prev;
93 struct winbindd_child *child;
94 struct winbindd_request *request;
95 struct winbindd_response *response;
96 void (*continuation)(void *private_data, BOOL success);
100 static void async_main_request_sent(void *private_data, BOOL success);
101 static void async_request_sent(void *private_data, BOOL success);
102 static void async_reply_recv(void *private_data, BOOL success);
103 static void schedule_async_request(struct winbindd_child *child);
105 void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
106 struct winbindd_request *request,
107 struct winbindd_response *response,
108 void (*continuation)(void *private_data, BOOL success),
111 struct winbindd_async_request *state, *tmp;
113 SMB_ASSERT(continuation != NULL);
115 state = TALLOC_P(mem_ctx, struct winbindd_async_request);
118 DEBUG(0, ("talloc failed\n"));
119 continuation(private_data, False);
123 state->mem_ctx = mem_ctx;
124 state->child = child;
125 state->request = request;
126 state->response = response;
127 state->continuation = continuation;
128 state->private_data = private_data;
130 DLIST_ADD_END(child->requests, state, tmp);
132 schedule_async_request(child);
137 static void async_main_request_sent(void *private_data, BOOL success)
139 struct winbindd_async_request *state =
140 talloc_get_type_abort(private_data, struct winbindd_async_request);
143 DEBUG(5, ("Could not send async request\n"));
145 state->response->length = sizeof(struct winbindd_response);
146 state->response->result = WINBINDD_ERROR;
147 state->continuation(state->private_data, False);
151 if (state->request->extra_len == 0) {
152 async_request_sent(private_data, True);
156 setup_async_write(&state->child->event, state->request->extra_data.data,
157 state->request->extra_len,
158 async_request_sent, state);
161 static void async_request_sent(void *private_data_data, BOOL success)
163 struct winbindd_async_request *state =
164 talloc_get_type_abort(private_data_data, struct winbindd_async_request);
167 DEBUG(5, ("Could not send async request\n"));
169 state->response->length = sizeof(struct winbindd_response);
170 state->response->result = WINBINDD_ERROR;
171 state->continuation(state->private_data, False);
175 /* Request successfully sent to the child, setup the wait for reply */
177 setup_async_read(&state->child->event,
178 &state->response->result,
179 sizeof(state->response->result),
180 async_reply_recv, state);
183 static void async_reply_recv(void *private_data, BOOL success)
185 struct winbindd_async_request *state =
186 talloc_get_type_abort(private_data, struct winbindd_async_request);
187 struct winbindd_child *child = state->child;
189 state->response->length = sizeof(struct winbindd_response);
192 DEBUG(5, ("Could not receive async reply\n"));
193 state->response->result = WINBINDD_ERROR;
197 SMB_ASSERT(cache_retrieve_response(child->pid,
200 cache_cleanup_response(child->pid);
202 DLIST_REMOVE(child->requests, state);
204 schedule_async_request(child);
206 state->continuation(state->private_data, True);
209 static BOOL fork_domain_child(struct winbindd_child *child);
211 static void schedule_async_request(struct winbindd_child *child)
213 struct winbindd_async_request *request = child->requests;
215 if (request == NULL) {
219 if (child->event.flags != 0) {
223 if ((child->pid == 0) && (!fork_domain_child(child))) {
224 /* Cancel all outstanding requests */
226 while (request != NULL) {
227 /* request might be free'd in the continuation */
228 struct winbindd_async_request *next = request->next;
229 request->continuation(request->private_data, False);
235 setup_async_write(&child->event, request->request,
236 sizeof(*request->request),
237 async_main_request_sent, request);
239 talloc_destroy(child->mem_ctx);
243 struct domain_request_state {
245 struct winbindd_domain *domain;
246 struct winbindd_request *request;
247 struct winbindd_response *response;
248 void (*continuation)(void *private_data_data, BOOL success);
249 void *private_data_data;
252 static void domain_init_recv(void *private_data_data, BOOL success);
254 void async_domain_request(TALLOC_CTX *mem_ctx,
255 struct winbindd_domain *domain,
256 struct winbindd_request *request,
257 struct winbindd_response *response,
258 void (*continuation)(void *private_data_data, BOOL success),
259 void *private_data_data)
261 struct domain_request_state *state;
263 if (domain->initialized) {
264 async_request(mem_ctx, &domain->child, request, response,
265 continuation, private_data_data);
269 state = TALLOC_P(mem_ctx, struct domain_request_state);
271 DEBUG(0, ("talloc failed\n"));
272 continuation(private_data_data, False);
276 state->mem_ctx = mem_ctx;
277 state->domain = domain;
278 state->request = request;
279 state->response = response;
280 state->continuation = continuation;
281 state->private_data_data = private_data_data;
283 init_child_connection(domain, domain_init_recv, state);
286 static void recvfrom_child(void *private_data_data, BOOL success)
288 struct winbindd_cli_state *state =
289 talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
290 enum winbindd_result result = state->response.result;
292 /* This is an optimization: The child has written directly to the
293 * response buffer. The request itself is still in pending state,
294 * state that in the result code. */
296 state->response.result = WINBINDD_PENDING;
298 if ((!success) || (result != WINBINDD_OK)) {
299 request_error(state);
306 void sendto_child(struct winbindd_cli_state *state,
307 struct winbindd_child *child)
309 async_request(state->mem_ctx, child, &state->request,
310 &state->response, recvfrom_child, state);
313 void sendto_domain(struct winbindd_cli_state *state,
314 struct winbindd_domain *domain)
316 async_domain_request(state->mem_ctx, domain,
317 &state->request, &state->response,
318 recvfrom_child, state);
321 static void domain_init_recv(void *private_data_data, BOOL success)
323 struct domain_request_state *state =
324 talloc_get_type_abort(private_data_data, struct domain_request_state);
327 DEBUG(5, ("Domain init returned an error\n"));
328 state->continuation(state->private_data_data, False);
332 async_request(state->mem_ctx, &state->domain->child,
333 state->request, state->response,
334 state->continuation, state->private_data_data);
337 struct winbindd_child_dispatch_table {
338 enum winbindd_cmd cmd;
339 enum winbindd_result (*fn)(struct winbindd_domain *domain,
340 struct winbindd_cli_state *state);
341 const char *winbindd_cmd_name;
344 static struct winbindd_child_dispatch_table child_dispatch_table[] = {
346 { WINBINDD_LOOKUPSID, winbindd_dual_lookupsid, "LOOKUPSID" },
347 { WINBINDD_LOOKUPNAME, winbindd_dual_lookupname, "LOOKUPNAME" },
348 { WINBINDD_LOOKUPRIDS, winbindd_dual_lookuprids, "LOOKUPRIDS" },
349 { WINBINDD_LIST_TRUSTDOM, winbindd_dual_list_trusted_domains, "LIST_TRUSTDOM" },
350 { WINBINDD_INIT_CONNECTION, winbindd_dual_init_connection, "INIT_CONNECTION" },
351 { WINBINDD_GETDCNAME, winbindd_dual_getdcname, "GETDCNAME" },
352 { WINBINDD_SHOW_SEQUENCE, winbindd_dual_show_sequence, "SHOW_SEQUENCE" },
353 { WINBINDD_PAM_AUTH, winbindd_dual_pam_auth, "PAM_AUTH" },
354 { WINBINDD_PAM_AUTH_CRAP, winbindd_dual_pam_auth_crap, "AUTH_CRAP" },
355 { WINBINDD_PAM_LOGOFF, winbindd_dual_pam_logoff, "PAM_LOGOFF" },
356 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP,winbindd_dual_pam_chng_pswd_auth_crap,"CHNG_PSWD_AUTH_CRAP" },
357 { WINBINDD_CHECK_MACHACC, winbindd_dual_check_machine_acct, "CHECK_MACHACC" },
358 { WINBINDD_DUAL_SID2UID, winbindd_dual_sid2uid, "DUAL_SID2UID" },
359 { WINBINDD_DUAL_SID2GID, winbindd_dual_sid2gid, "DUAL_SID2GID" },
360 { WINBINDD_DUAL_UID2SID, winbindd_dual_uid2sid, "DUAL_UID2SID" },
361 { WINBINDD_DUAL_GID2SID, winbindd_dual_gid2sid, "DUAL_GID2SID" },
362 { WINBINDD_DUAL_UID2NAME, winbindd_dual_uid2name, "DUAL_UID2NAME" },
363 { WINBINDD_DUAL_NAME2UID, winbindd_dual_name2uid, "DUAL_NAME2UID" },
364 { WINBINDD_DUAL_GID2NAME, winbindd_dual_gid2name, "DUAL_GID2NAME" },
365 { WINBINDD_DUAL_NAME2GID, winbindd_dual_name2gid, "DUAL_NAME2GID" },
366 { WINBINDD_DUAL_IDMAPSET, winbindd_dual_idmapset, "DUAL_IDMAPSET" },
367 { WINBINDD_DUAL_USERINFO, winbindd_dual_userinfo, "DUAL_USERINFO" },
368 { WINBINDD_ALLOCATE_UID, winbindd_dual_allocate_uid, "ALLOCATE_UID" },
369 { WINBINDD_ALLOCATE_GID, winbindd_dual_allocate_gid, "ALLOCATE_GID" },
370 { WINBINDD_GETUSERDOMGROUPS, winbindd_dual_getuserdomgroups, "GETUSERDOMGROUPS" },
371 { WINBINDD_DUAL_GETSIDALIASES, winbindd_dual_getsidaliases, "GETSIDALIASES" },
372 { WINBINDD_CCACHE_NTLMAUTH, winbindd_dual_ccache_ntlm_auth, "CCACHE_NTLM_AUTH" },
375 { WINBINDD_NUM_CMDS, NULL, "NONE" }
378 static void child_process_request(struct winbindd_domain *domain,
379 struct winbindd_cli_state *state)
381 struct winbindd_child_dispatch_table *table;
383 /* Free response data - we may be interrupted and receive another
384 command before being able to send this data off. */
386 state->response.result = WINBINDD_ERROR;
387 state->response.length = sizeof(struct winbindd_response);
389 state->mem_ctx = talloc_init("winbind request");
390 if (state->mem_ctx == NULL)
393 /* Process command */
395 for (table = child_dispatch_table; table->fn; table++) {
396 if (state->request.cmd == table->cmd) {
397 DEBUG(10,("process_request: request fn %s\n",
398 table->winbindd_cmd_name ));
399 state->response.result = table->fn(domain, state);
405 DEBUG(10,("process_request: unknown request fn number %d\n",
406 (int)state->request.cmd ));
407 state->response.result = WINBINDD_ERROR;
410 talloc_destroy(state->mem_ctx);
413 void setup_domain_child(struct winbindd_domain *domain,
414 struct winbindd_child *child,
415 const char *explicit_logfile)
417 if (explicit_logfile != NULL) {
418 pstr_sprintf(child->logfilename, "%s/log.winbindd-%s",
419 dyn_LOGFILEBASE, explicit_logfile);
420 } else if (domain != NULL) {
421 pstr_sprintf(child->logfilename, "%s/log.wb-%s",
422 dyn_LOGFILEBASE, domain->name);
424 smb_panic("Internal error: domain == NULL && "
425 "explicit_logfile == NULL");
428 child->domain = domain;
431 struct winbindd_child *children = NULL;
433 void winbind_child_died(pid_t pid)
435 struct winbindd_child *child;
437 for (child = children; child != NULL; child = child->next) {
438 if (child->pid == pid) {
444 DEBUG(0, ("Unknown child %d died!\n", pid));
448 remove_fd_event(&child->event);
449 close(child->event.fd);
451 child->event.flags = 0;
454 schedule_async_request(child);
457 /* Forward the online/offline messages to our children. */
458 void winbind_msg_offline(int msg_type, struct process_id src, void *buf, size_t len)
460 struct winbindd_child *child;
462 DEBUG(10,("winbind_msg_offline: got offline message.\n"));
464 if (!lp_winbind_offline_logon()) {
465 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
469 /* Set our global state as offline. */
470 if (!set_global_winbindd_state_offline()) {
471 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
475 for (child = children; child != NULL; child = child->next) {
476 DEBUG(10,("winbind_msg_offline: sending message to pid %u.\n",
477 (unsigned int)child->pid ));
478 message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_OFFLINE, NULL, 0, False);
482 /* Forward the online/offline messages to our children. */
483 void winbind_msg_online(int msg_type, struct process_id src, void *buf, size_t len)
485 struct winbindd_child *child;
487 DEBUG(10,("winbind_msg_online: got online message.\n"));
489 if (!lp_winbind_offline_logon()) {
490 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
494 /* Set our global state as online. */
495 set_global_winbindd_state_online();
497 for (child = children; child != NULL; child = child->next) {
498 DEBUG(10,("winbind_msg_online: sending message to pid %u.\n",
499 (unsigned int)child->pid ));
500 message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_ONLINE, NULL, 0, False);
504 /* Forward the online/offline messages to our children. */
505 void winbind_msg_onlinestatus(int msg_type, struct process_id src, void *buf, size_t len)
507 struct winbindd_child *child;
509 DEBUG(10,("winbind_msg_onlinestatus: got onlinestatus message.\n"));
511 for (child = children; child != NULL; child = child->next) {
512 if (child->domain && child->domain->primary) {
513 DEBUG(10,("winbind_msg_onlinestatus: "
514 "sending message to pid %u of primary domain.\n",
515 (unsigned int)child->pid));
516 message_send_pid(pid_to_procid(child->pid),
517 MSG_WINBIND_ONLINESTATUS, buf, len, False);
524 static void account_lockout_policy_handler(struct timed_event *te,
525 const struct timeval *now,
528 struct winbindd_child *child =
529 (struct winbindd_child *)private_data;
531 struct winbindd_methods *methods;
532 SAM_UNK_INFO_12 lockout_policy;
535 DEBUG(10,("account_lockout_policy_handler called\n"));
537 if (child->lockout_policy_event) {
538 TALLOC_FREE(child->lockout_policy_event);
541 methods = child->domain->methods;
543 result = methods->lockout_policy(child->domain, child->mem_ctx, &lockout_policy);
544 if (!NT_STATUS_IS_OK(result)) {
545 DEBUG(10,("account_lockout_policy_handler: failed to call lockout_policy\n"));
549 child->lockout_policy_event = add_timed_event(child->mem_ctx,
550 timeval_current_ofs(3600, 0),
551 "account_lockout_policy_handler",
552 account_lockout_policy_handler,
556 /* Deal with a request to go offline. */
558 static void child_msg_offline(int msg_type, struct process_id src, void *buf, size_t len)
560 struct winbindd_domain *domain;
562 DEBUG(5,("child_msg_offline received.\n"));
564 if (!lp_winbind_offline_logon()) {
565 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
569 /* Set our global state as offline. */
570 if (!set_global_winbindd_state_offline()) {
571 DEBUG(10,("child_msg_offline: offline request failed.\n"));
575 /* Mark all our domains as offline. */
577 for (domain = domain_list(); domain; domain = domain->next) {
578 DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
579 set_domain_offline(domain);
583 /* Ensure any negative cache entries with the netbios or realm names are removed. */
585 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
587 flush_negative_conn_cache_for_domain(domain->name);
588 if (*domain->alt_name) {
589 flush_negative_conn_cache_for_domain(domain->alt_name);
593 /* Deal with a request to go online. */
595 static void child_msg_online(int msg_type, struct process_id src, void *buf, size_t len)
597 struct winbindd_domain *domain;
599 DEBUG(5,("child_msg_online received.\n"));
601 if (!lp_winbind_offline_logon()) {
602 DEBUG(10,("child_msg_online: rejecting online message.\n"));
606 /* Set our global state as online. */
607 set_global_winbindd_state_online();
609 winbindd_flush_nscd_cache();
611 /* Try and mark everything online - delete any negative cache entries
612 to force a reconnect now. */
614 for (domain = domain_list(); domain; domain = domain->next) {
615 DEBUG(5,("child_msg_online: marking %s online.\n", domain->name));
616 winbindd_flush_negative_conn_cache(domain);
617 set_domain_online_request(domain);
621 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
623 struct winbindd_domain *domain;
626 if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
627 get_global_winbindd_state_offline() ?
628 "Offline":"Online")) == NULL) {
632 for (domain = domain_list(); domain; domain = domain->next) {
633 if ((buf = talloc_asprintf_append(buf, "%s:%s ",
636 "Online":"Offline")) == NULL) {
641 buf = talloc_asprintf_append(buf, "\n");
643 DEBUG(5,("collect_onlinestatus: %s", buf));
648 static void child_msg_onlinestatus(int msg_type, struct process_id src, void *buf, size_t len)
652 struct process_id *sender;
654 DEBUG(5,("winbind_msg_onlinestatus received.\n"));
660 sender = (struct process_id *)buf;
662 mem_ctx = talloc_init("winbind_msg_onlinestatus");
663 if (mem_ctx == NULL) {
667 message = collect_onlinestatus(mem_ctx);
668 if (message == NULL) {
669 talloc_destroy(mem_ctx);
673 message_send_pid(*sender, MSG_WINBIND_ONLINESTATUS,
674 message, strlen(message) + 1, True);
676 talloc_destroy(mem_ctx);
679 static BOOL fork_domain_child(struct winbindd_child *child)
682 struct winbindd_cli_state state;
683 extern BOOL override_logfile;
686 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
687 DEBUG(0, ("Could not open child pipe: %s\n",
693 state.pid = getpid();
695 /* Ensure we don't process messages whilst we're
696 changing the disposition for the child. */
699 child->pid = sys_fork();
701 if (child->pid == -1) {
702 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
707 if (child->pid != 0) {
710 child->next = child->prev = NULL;
711 DLIST_ADD(children, child);
712 child->event.fd = fdpair[1];
713 child->event.flags = 0;
714 child->requests = NULL;
715 add_fd_event(&child->event);
716 /* We're ok with online/offline messages now. */
723 state.sock = fdpair[0];
726 /* tdb needs special fork handling */
727 if (tdb_reopen_all(1) == -1) {
728 DEBUG(0,("tdb_reopen_all failed.\n"));
732 close_conns_after_fork();
734 if (!override_logfile) {
735 lp_set_logfile(child->logfilename);
739 /* Don't handle the same messages as our parent. */
740 message_deregister(MSG_SMB_CONF_UPDATED);
741 message_deregister(MSG_SHUTDOWN);
742 message_deregister(MSG_WINBIND_OFFLINE);
743 message_deregister(MSG_WINBIND_ONLINE);
744 message_deregister(MSG_WINBIND_ONLINESTATUS);
746 /* The child is ok with online/offline messages now. */
749 child->mem_ctx = talloc_init("child_mem_ctx");
750 if (child->mem_ctx == NULL) {
754 if (child->domain != NULL && lp_winbind_offline_logon()) {
755 /* We might be in the idmap child...*/
756 child->lockout_policy_event = add_timed_event(
757 child->mem_ctx, timeval_zero(),
758 "account_lockout_policy_handler",
759 account_lockout_policy_handler,
763 /* Handle online/offline messages. */
764 message_register(MSG_WINBIND_OFFLINE,child_msg_offline);
765 message_register(MSG_WINBIND_ONLINE,child_msg_online);
766 message_register(MSG_WINBIND_ONLINESTATUS,child_msg_onlinestatus);
768 child->domain->startup = True;
769 startup_time = time(NULL);
779 /* free up any talloc memory */
781 main_loop_TALLOC_FREE();
787 if (child->domain->startup && (now.tv_sec > startup_time + 30)) {
788 /* No longer in "startup" mode. */
789 DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
790 child->domain->name ));
791 child->domain->startup = False;
794 tp = get_timed_events_timeout(&t);
796 DEBUG(11,("select will use timeout of %u.%u seconds\n",
797 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
800 /* Handle messages */
805 FD_SET(state.sock, &read_fds);
807 ret = sys_select(state.sock + 1, &read_fds, NULL, NULL, tp);
810 DEBUG(11,("nothing is ready yet, continue\n"));
814 if (ret == -1 && errno == EINTR) {
815 /* We got a signal - continue. */
819 if (ret == -1 && errno != EINTR) {
820 DEBUG(0,("select error occured\n"));
825 /* fetch a request from the main daemon */
826 child_read_request(&state);
828 if (state.finished) {
829 /* we lost contact with our parent */
833 DEBUG(4,("child daemon request %d\n", (int)state.request.cmd));
835 ZERO_STRUCT(state.response);
836 state.request.null_term = '\0';
837 child_process_request(child->domain, &state);
839 SAFE_FREE(state.request.extra_data.data);
841 cache_store_response(sys_getpid(), &state.response);
843 SAFE_FREE(state.response.extra_data.data);
845 /* We just send the result code back, the result
846 * structure needs to be fetched via the
847 * winbindd_cache. Hmm. That needs fixing... */
849 if (write_data(state.sock,
850 (const char *)&state.response.result,
851 sizeof(state.response.result)) !=
852 sizeof(state.response.result)) {
853 DEBUG(0, ("Could not write result\n"));