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s3: Remove unused name_queries
[Samba.git] / source3 / winbindd / winbindd.c
blob3d29e3fd51b6ab941c1a11826923b8b6a9ecfc54
1 /*
2 Unix SMB/CIFS implementation.
3
4 Winbind daemon for ntdom nss module
5
6 Copyright (C) by Tim Potter 2000-2002
7 Copyright (C) Andrew Tridgell 2002
8 Copyright (C) Jelmer Vernooij 2003
9 Copyright (C) Volker Lendecke 2004
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "popt_common.h"
27 #include "winbindd.h"
28 #include "nsswitch/winbind_client.h"
29 #include "nsswitch/wb_reqtrans.h"
30 #include "ntdomain.h"
31 #include "../librpc/gen_ndr/srv_lsa.h"
32 #include "../librpc/gen_ndr/srv_samr.h"
33 #include "secrets.h"
34 #include "idmap.h"
35 #include "lib/addrchange.h"
36 #include "serverid.h"
37 #include "auth.h"
38 #include "messages.h"
39
40 #undef DBGC_CLASS
41 #define DBGC_CLASS DBGC_WINBIND
42
43 static bool client_is_idle(struct winbindd_cli_state *state);
44 static void remove_client(struct winbindd_cli_state *state);
45
46 static bool opt_nocache = False;
47 static bool interactive = False;
48
49 extern bool override_logfile;
50
51 struct messaging_context *winbind_messaging_context(void)
52 {
53 struct messaging_context *msg_ctx = server_messaging_context();
54 if (likely(msg_ctx != NULL)) {
55 return msg_ctx;
56 }
57 smb_panic("Could not init winbindd's messaging context.\n");
58 return NULL;
59 }
60
61 /* Reload configuration */
62
63 static bool reload_services_file(const char *lfile)
64 {
65 bool ret;
66
67 if (lp_loaded()) {
68 const char *fname = lp_configfile();
69
70 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
71 set_dyn_CONFIGFILE(fname);
72 }
73 }
74
75 /* if this is a child, restore the logfile to the special
76 name - <domain>, idmap, etc. */
77 if (lfile && *lfile) {
78 lp_set_logfile(lfile);
79 }
80
81 reopen_logs();
82 ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
83
84 reopen_logs();
85 load_interfaces();
86
87 return(ret);
88 }
89
90
91 static void winbindd_status(void)
92 {
93 struct winbindd_cli_state *tmp;
94
95 DEBUG(0, ("winbindd status:\n"));
96
97 /* Print client state information */
98
99 DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
100
101 if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
102 DEBUG(2, ("\tclient list:\n"));
103 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
104 DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
105 (unsigned long)tmp->pid, tmp->sock,
106 client_is_idle(tmp) ? "idle" : "active"));
107 }
108 }
109 }
110
111 /* Flush client cache */
112
113 static void flush_caches(void)
114 {
115 /* We need to invalidate cached user list entries on a SIGHUP
116 otherwise cached access denied errors due to restrict anonymous
117 hang around until the sequence number changes. */
118
119 if (!wcache_invalidate_cache()) {
120 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
121 if (!winbindd_cache_validate_and_initialize()) {
122 exit(1);
123 }
124 }
125 }
126
127 static void flush_caches_noinit(void)
128 {
129 /*
130 * We need to invalidate cached user list entries on a SIGHUP
131 * otherwise cached access denied errors due to restrict anonymous
132 * hang around until the sequence number changes.
133 * NB
134 * Skip uninitialized domains when flush cache.
135 * If domain is not initialized, it means it is never
136 * used or never become online. look, wcache_invalidate_cache()
137 * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
138 * for unused domains and large traffic for primay domain's DC if there
139 * are many domains..
140 */
141
142 if (!wcache_invalidate_cache_noinit()) {
143 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
144 if (!winbindd_cache_validate_and_initialize()) {
145 exit(1);
146 }
147 }
148 }
149
150 /* Handle the signal by unlinking socket and exiting */
151
152 static void terminate(bool is_parent)
153 {
154 if (is_parent) {
155 /* When parent goes away we should
156 * remove the socket file. Not so
157 * when children terminate.
158 */
159 char *path = NULL;
160
161 if (asprintf(&path, "%s/%s",
162 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
163 unlink(path);
164 SAFE_FREE(path);
165 }
166 }
167
168 idmap_close();
169
170 trustdom_cache_shutdown();
171
172 gencache_stabilize();
173
174 #if 0
175 if (interactive) {
176 TALLOC_CTX *mem_ctx = talloc_init("end_description");
177 char *description = talloc_describe_all(mem_ctx);
178
179 DEBUG(3, ("tallocs left:\n%s\n", description));
180 talloc_destroy(mem_ctx);
181 }
182 #endif
183
184 if (is_parent) {
185 serverid_deregister(procid_self());
186 pidfile_unlink();
187 }
188
189 exit(0);
190 }
191
192 static void winbindd_sig_term_handler(struct tevent_context *ev,
193 struct tevent_signal *se,
194 int signum,
195 int count,
196 void *siginfo,
197 void *private_data)
198 {
199 bool *is_parent = talloc_get_type_abort(private_data, bool);
200
201 DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
202 signum, (int)*is_parent));
203 terminate(*is_parent);
204 }
205
206 bool winbindd_setup_sig_term_handler(bool parent)
207 {
208 struct tevent_signal *se;
209 bool *is_parent;
210
211 is_parent = talloc(winbind_event_context(), bool);
212 if (!is_parent) {
213 return false;
214 }
215
216 *is_parent = parent;
217
218 se = tevent_add_signal(winbind_event_context(),
219 is_parent,
220 SIGTERM, 0,
221 winbindd_sig_term_handler,
222 is_parent);
223 if (!se) {
224 DEBUG(0,("failed to setup SIGTERM handler"));
225 talloc_free(is_parent);
226 return false;
227 }
228
229 se = tevent_add_signal(winbind_event_context(),
230 is_parent,
231 SIGINT, 0,
232 winbindd_sig_term_handler,
233 is_parent);
234 if (!se) {
235 DEBUG(0,("failed to setup SIGINT handler"));
236 talloc_free(is_parent);
237 return false;
238 }
239
240 se = tevent_add_signal(winbind_event_context(),
241 is_parent,
242 SIGQUIT, 0,
243 winbindd_sig_term_handler,
244 is_parent);
245 if (!se) {
246 DEBUG(0,("failed to setup SIGINT handler"));
247 talloc_free(is_parent);
248 return false;
249 }
250
251 return true;
252 }
253
254 static void winbindd_sig_hup_handler(struct tevent_context *ev,
255 struct tevent_signal *se,
256 int signum,
257 int count,
258 void *siginfo,
259 void *private_data)
260 {
261 const char *file = (const char *)private_data;
262
263 DEBUG(1,("Reloading services after SIGHUP\n"));
264 flush_caches_noinit();
265 reload_services_file(file);
266 }
267
268 bool winbindd_setup_sig_hup_handler(const char *lfile)
269 {
270 struct tevent_signal *se;
271 char *file = NULL;
272
273 if (lfile) {
274 file = talloc_strdup(winbind_event_context(),
275 lfile);
276 if (!file) {
277 return false;
278 }
279 }
280
281 se = tevent_add_signal(winbind_event_context(),
282 winbind_event_context(),
283 SIGHUP, 0,
284 winbindd_sig_hup_handler,
285 file);
286 if (!se) {
287 return false;
288 }
289
290 return true;
291 }
292
293 static void winbindd_sig_chld_handler(struct tevent_context *ev,
294 struct tevent_signal *se,
295 int signum,
296 int count,
297 void *siginfo,
298 void *private_data)
299 {
300 pid_t pid;
301
302 while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
303 winbind_child_died(pid);
304 }
305 }
306
307 static bool winbindd_setup_sig_chld_handler(void)
308 {
309 struct tevent_signal *se;
310
311 se = tevent_add_signal(winbind_event_context(),
312 winbind_event_context(),
313 SIGCHLD, 0,
314 winbindd_sig_chld_handler,
315 NULL);
316 if (!se) {
317 return false;
318 }
319
320 return true;
321 }
322
323 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
324 struct tevent_signal *se,
325 int signum,
326 int count,
327 void *siginfo,
328 void *private_data)
329 {
330 winbindd_status();
331 }
332
333 static bool winbindd_setup_sig_usr2_handler(void)
334 {
335 struct tevent_signal *se;
336
337 se = tevent_add_signal(winbind_event_context(),
338 winbind_event_context(),
339 SIGUSR2, 0,
340 winbindd_sig_usr2_handler,
341 NULL);
342 if (!se) {
343 return false;
344 }
345
346 return true;
347 }
348
349 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
350 static void msg_reload_services(struct messaging_context *msg,
351 void *private_data,
352 uint32_t msg_type,
353 struct server_id server_id,
354 DATA_BLOB *data)
355 {
356 /* Flush various caches */
357 flush_caches();
358 reload_services_file((const char *) private_data);
359 }
360
361 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
362 static void msg_shutdown(struct messaging_context *msg,
363 void *private_data,
364 uint32_t msg_type,
365 struct server_id server_id,
366 DATA_BLOB *data)
367 {
368 /* only the parent waits for this message */
369 DEBUG(0,("Got shutdown message\n"));
370 terminate(true);
371 }
372
373
374 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
375 void *private_data,
376 uint32_t msg_type,
377 struct server_id server_id,
378 DATA_BLOB *data)
379 {
380 uint8 ret;
381 pid_t child_pid;
382 NTSTATUS status;
383
384 DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
385 "message.\n"));
386
387 /*
388 * call the validation code from a child:
389 * so we don't block the main winbindd and the validation
390 * code can safely use fork/waitpid...
391 */
392 child_pid = sys_fork();
393
394 if (child_pid == -1) {
395 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
396 strerror(errno)));
397 return;
398 }
399
400 if (child_pid != 0) {
401 /* parent */
402 DEBUG(5, ("winbind_msg_validate_cache: child created with "
403 "pid %d.\n", (int)child_pid));
404 return;
405 }
406
407 /* child */
408
409 status = winbindd_reinit_after_fork(NULL, NULL);
410 if (!NT_STATUS_IS_OK(status)) {
411 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
412 nt_errstr(status)));
413 _exit(0);
414 }
415
416 /* install default SIGCHLD handler: validation code uses fork/waitpid */
417 CatchSignal(SIGCHLD, SIG_DFL);
418
419 ret = (uint8)winbindd_validate_cache_nobackup();
420 DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
421 messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
422 (size_t)1);
423 _exit(0);
424 }
425
426 static struct winbindd_dispatch_table {
427 enum winbindd_cmd cmd;
428 void (*fn)(struct winbindd_cli_state *state);
429 const char *winbindd_cmd_name;
430 } dispatch_table[] = {
431
432 /* Enumeration functions */
433
434 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
435 "LIST_TRUSTDOM" },
436
437 /* Miscellaneous */
438
439 { WINBINDD_INFO, winbindd_info, "INFO" },
440 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
441 "INTERFACE_VERSION" },
442 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
443 { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
444 { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
445 { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
446 { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
447 "WINBINDD_PRIV_PIPE_DIR" },
448
449 /* Credential cache access */
450 { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
451 { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
452
453 /* WINS functions */
454
455 { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
456
457 /* End of list */
458
459 { WINBINDD_NUM_CMDS, NULL, "NONE" }
460 };
461
462 struct winbindd_async_dispatch_table {
463 enum winbindd_cmd cmd;
464 const char *cmd_name;
465 struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
466 struct tevent_context *ev,
467 struct winbindd_cli_state *cli,
468 struct winbindd_request *request);
469 NTSTATUS (*recv_req)(struct tevent_req *req,
470 struct winbindd_response *presp);
471 };
472
473 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
474 { WINBINDD_PING, "PING",
475 wb_ping_send, wb_ping_recv },
476 { WINBINDD_LOOKUPSID, "LOOKUPSID",
477 winbindd_lookupsid_send, winbindd_lookupsid_recv },
478 { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
479 winbindd_lookupsids_send, winbindd_lookupsids_recv },
480 { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
481 winbindd_lookupname_send, winbindd_lookupname_recv },
482 { WINBINDD_SID_TO_UID, "SID_TO_UID",
483 winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
484 { WINBINDD_SID_TO_GID, "SID_TO_GID",
485 winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
486 { WINBINDD_UID_TO_SID, "UID_TO_SID",
487 winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
488 { WINBINDD_GID_TO_SID, "GID_TO_SID",
489 winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
490 { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
491 winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
492 { WINBINDD_GETPWSID, "GETPWSID",
493 winbindd_getpwsid_send, winbindd_getpwsid_recv },
494 { WINBINDD_GETPWNAM, "GETPWNAM",
495 winbindd_getpwnam_send, winbindd_getpwnam_recv },
496 { WINBINDD_GETPWUID, "GETPWUID",
497 winbindd_getpwuid_send, winbindd_getpwuid_recv },
498 { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
499 winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
500 { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
501 winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
502 { WINBINDD_GETGROUPS, "GETGROUPS",
503 winbindd_getgroups_send, winbindd_getgroups_recv },
504 { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
505 winbindd_show_sequence_send, winbindd_show_sequence_recv },
506 { WINBINDD_GETGRGID, "GETGRGID",
507 winbindd_getgrgid_send, winbindd_getgrgid_recv },
508 { WINBINDD_GETGRNAM, "GETGRNAM",
509 winbindd_getgrnam_send, winbindd_getgrnam_recv },
510 { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
511 winbindd_getusersids_send, winbindd_getusersids_recv },
512 { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
513 winbindd_lookuprids_send, winbindd_lookuprids_recv },
514 { WINBINDD_SETPWENT, "SETPWENT",
515 winbindd_setpwent_send, winbindd_setpwent_recv },
516 { WINBINDD_GETPWENT, "GETPWENT",
517 winbindd_getpwent_send, winbindd_getpwent_recv },
518 { WINBINDD_ENDPWENT, "ENDPWENT",
519 winbindd_endpwent_send, winbindd_endpwent_recv },
520 { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
521 winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
522 { WINBINDD_GETDCNAME, "GETDCNAME",
523 winbindd_getdcname_send, winbindd_getdcname_recv },
524 { WINBINDD_SETGRENT, "SETGRENT",
525 winbindd_setgrent_send, winbindd_setgrent_recv },
526 { WINBINDD_GETGRENT, "GETGRENT",
527 winbindd_getgrent_send, winbindd_getgrent_recv },
528 { WINBINDD_ENDGRENT, "ENDGRENT",
529 winbindd_endgrent_send, winbindd_endgrent_recv },
530 { WINBINDD_LIST_USERS, "LIST_USERS",
531 winbindd_list_users_send, winbindd_list_users_recv },
532 { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
533 winbindd_list_groups_send, winbindd_list_groups_recv },
534 { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
535 winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
536 { WINBINDD_PING_DC, "PING_DC",
537 winbindd_ping_dc_send, winbindd_ping_dc_recv },
538 { WINBINDD_PAM_AUTH, "PAM_AUTH",
539 winbindd_pam_auth_send, winbindd_pam_auth_recv },
540 { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
541 winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
542 { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
543 winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
544 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
545 winbindd_pam_chng_pswd_auth_crap_send,
546 winbindd_pam_chng_pswd_auth_crap_recv },
547 { WINBINDD_WINS_BYIP, "PING",
548 winbindd_wins_byip_send, winbindd_wins_byip_recv },
549
550 { 0, NULL, NULL, NULL }
551 };
552
553 static struct winbindd_async_dispatch_table async_priv_table[] = {
554 { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
555 winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
556 { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
557 winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
558 { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
559 winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
560 { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
561 winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
562
563 { 0, NULL, NULL, NULL }
564 };
565
566 static void wb_request_done(struct tevent_req *req);
567
568 static void process_request(struct winbindd_cli_state *state)
569 {
570 struct winbindd_dispatch_table *table = dispatch_table;
571 struct winbindd_async_dispatch_table *atable;
572
573 state->mem_ctx = talloc_named(state, 0, "winbind request");
574 if (state->mem_ctx == NULL)
575 return;
576
577 /* Remember who asked us. */
578 state->pid = state->request->pid;
579
580 state->cmd_name = "unknown request";
581 state->recv_fn = NULL;
582
583 /* Process command */
584
585 for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
586 if (state->request->cmd == atable->cmd) {
587 break;
588 }
589 }
590
591 if ((atable->send_req == NULL) && state->privileged) {
592 for (atable = async_priv_table; atable->send_req;
593 atable += 1) {
594 if (state->request->cmd == atable->cmd) {
595 break;
596 }
597 }
598 }
599
600 if (atable->send_req != NULL) {
601 struct tevent_req *req;
602
603 state->cmd_name = atable->cmd_name;
604 state->recv_fn = atable->recv_req;
605
606 DEBUG(10, ("process_request: Handling async request %d:%s\n",
607 (int)state->pid, state->cmd_name));
608
609 req = atable->send_req(state->mem_ctx, winbind_event_context(),
610 state, state->request);
611 if (req == NULL) {
612 DEBUG(0, ("process_request: atable->send failed for "
613 "%s\n", atable->cmd_name));
614 request_error(state);
615 return;
616 }
617 tevent_req_set_callback(req, wb_request_done, state);
618 return;
619 }
620
621 state->response = talloc_zero(state->mem_ctx,
622 struct winbindd_response);
623 if (state->response == NULL) {
624 DEBUG(10, ("talloc failed\n"));
625 remove_client(state);
626 return;
627 }
628 state->response->result = WINBINDD_PENDING;
629 state->response->length = sizeof(struct winbindd_response);
630
631 for (table = dispatch_table; table->fn; table++) {
632 if (state->request->cmd == table->cmd) {
633 DEBUG(10,("process_request: request fn %s\n",
634 table->winbindd_cmd_name ));
635 state->cmd_name = table->winbindd_cmd_name;
636 table->fn(state);
637 break;
638 }
639 }
640
641 if (!table->fn) {
642 DEBUG(10,("process_request: unknown request fn number %d\n",
643 (int)state->request->cmd ));
644 request_error(state);
645 }
646 }
647
648 static void wb_request_done(struct tevent_req *req)
649 {
650 struct winbindd_cli_state *state = tevent_req_callback_data(
651 req, struct winbindd_cli_state);
652 NTSTATUS status;
653
654 state->response = talloc_zero(state->mem_ctx,
655 struct winbindd_response);
656 if (state->response == NULL) {
657 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
658 (int)state->pid, state->cmd_name));
659 remove_client(state);
660 return;
661 }
662 state->response->result = WINBINDD_PENDING;
663 state->response->length = sizeof(struct winbindd_response);
664
665 status = state->recv_fn(req, state->response);
666 TALLOC_FREE(req);
667
668 DEBUG(10,("wb_request_done[%d:%s]: %s\n",
669 (int)state->pid, state->cmd_name, nt_errstr(status)));
670
671 if (!NT_STATUS_IS_OK(status)) {
672 request_error(state);
673 return;
674 }
675 request_ok(state);
676 }
677
678 /*
679 * This is the main event loop of winbind requests. It goes through a
680 * state-machine of 3 read/write requests, 4 if you have extra data to send.
681 *
682 * An idle winbind client has a read request of 4 bytes outstanding,
683 * finalizing function is request_len_recv, checking the length. request_recv
684 * then processes the packet. The processing function then at some point has
685 * to call request_finished which schedules sending the response.
686 */
687
688 static void request_finished(struct winbindd_cli_state *state);
689
690 static void winbind_client_request_read(struct tevent_req *req);
691 static void winbind_client_response_written(struct tevent_req *req);
692
693 static void request_finished(struct winbindd_cli_state *state)
694 {
695 struct tevent_req *req;
696
697 TALLOC_FREE(state->request);
698
699 req = wb_resp_write_send(state, winbind_event_context(),
700 state->out_queue, state->sock,
701 state->response);
702 if (req == NULL) {
703 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
704 (int)state->pid, state->cmd_name));
705 remove_client(state);
706 return;
707 }
708 tevent_req_set_callback(req, winbind_client_response_written, state);
709 }
710
711 static void winbind_client_response_written(struct tevent_req *req)
712 {
713 struct winbindd_cli_state *state = tevent_req_callback_data(
714 req, struct winbindd_cli_state);
715 ssize_t ret;
716 int err;
717
718 ret = wb_resp_write_recv(req, &err);
719 TALLOC_FREE(req);
720 if (ret == -1) {
721 close(state->sock);
722 state->sock = -1;
723 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
724 (int)state->pid, state->cmd_name, strerror(err)));
725 remove_client(state);
726 return;
727 }
728
729 DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
730 "to client\n", (int)state->pid, state->cmd_name));
731
732 TALLOC_FREE(state->mem_ctx);
733 state->response = NULL;
734 state->cmd_name = "no request";
735 state->recv_fn = NULL;
736
737 req = wb_req_read_send(state, winbind_event_context(), state->sock,
738 WINBINDD_MAX_EXTRA_DATA);
739 if (req == NULL) {
740 remove_client(state);
741 return;
742 }
743 tevent_req_set_callback(req, winbind_client_request_read, state);
744 }
745
746 void request_error(struct winbindd_cli_state *state)
747 {
748 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
749 state->response->result = WINBINDD_ERROR;
750 request_finished(state);
751 }
752
753 void request_ok(struct winbindd_cli_state *state)
754 {
755 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
756 state->response->result = WINBINDD_OK;
757 request_finished(state);
758 }
759
760 /* Process a new connection by adding it to the client connection list */
761
762 static void new_connection(int listen_sock, bool privileged)
763 {
764 struct sockaddr_un sunaddr;
765 struct winbindd_cli_state *state;
766 struct tevent_req *req;
767 socklen_t len;
768 int sock;
769
770 /* Accept connection */
771
772 len = sizeof(sunaddr);
773
774 sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
775
776 if (sock == -1) {
777 if (errno != EINTR) {
778 DEBUG(0, ("Faild to accept socket - %s\n",
779 strerror(errno)));
780 }
781 return;
782 }
783
784 DEBUG(6,("accepted socket %d\n", sock));
785
786 /* Create new connection structure */
787
788 if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
789 close(sock);
790 return;
791 }
792
793 state->sock = sock;
794
795 state->out_queue = tevent_queue_create(state, "winbind client reply");
796 if (state->out_queue == NULL) {
797 close(sock);
798 TALLOC_FREE(state);
799 return;
800 }
801
802 state->last_access = time(NULL);
803
804 state->privileged = privileged;
805
806 req = wb_req_read_send(state, winbind_event_context(), state->sock,
807 WINBINDD_MAX_EXTRA_DATA);
808 if (req == NULL) {
809 TALLOC_FREE(state);
810 close(sock);
811 return;
812 }
813 tevent_req_set_callback(req, winbind_client_request_read, state);
814
815 /* Add to connection list */
816
817 winbindd_add_client(state);
818 }
819
820 static void winbind_client_request_read(struct tevent_req *req)
821 {
822 struct winbindd_cli_state *state = tevent_req_callback_data(
823 req, struct winbindd_cli_state);
824 ssize_t ret;
825 int err;
826
827 ret = wb_req_read_recv(req, state, &state->request, &err);
828 TALLOC_FREE(req);
829 if (ret == -1) {
830 if (err == EPIPE) {
831 DEBUG(6, ("closing socket %d, client exited\n",
832 state->sock));
833 } else {
834 DEBUG(2, ("Could not read client request from fd %d: "
835 "%s\n", state->sock, strerror(err)));
836 }
837 close(state->sock);
838 state->sock = -1;
839 remove_client(state);
840 return;
841 }
842 process_request(state);
843 }
844
845 /* Remove a client connection from client connection list */
846
847 static void remove_client(struct winbindd_cli_state *state)
848 {
849 char c = 0;
850 int nwritten;
851
852 /* It's a dead client - hold a funeral */
853
854 if (state == NULL) {
855 return;
856 }
857
858 if (state->sock != -1) {
859 /* tell client, we are closing ... */
860 nwritten = write(state->sock, &c, sizeof(c));
861 if (nwritten == -1) {
862 DEBUG(2, ("final write to client failed: %s\n",
863 strerror(errno)));
864 }
865
866 /* Close socket */
867
868 close(state->sock);
869 state->sock = -1;
870 }
871
872 TALLOC_FREE(state->mem_ctx);
873
874 /* Remove from list and free */
875
876 winbindd_remove_client(state);
877 TALLOC_FREE(state);
878 }
879
880 /* Is a client idle? */
881
882 static bool client_is_idle(struct winbindd_cli_state *state) {
883 return (state->response == NULL &&
884 !state->pwent_state && !state->grent_state);
885 }
886
887 /* Shutdown client connection which has been idle for the longest time */
888
889 static bool remove_idle_client(void)
890 {
891 struct winbindd_cli_state *state, *remove_state = NULL;
892 time_t last_access = 0;
893 int nidle = 0;
894
895 for (state = winbindd_client_list(); state; state = state->next) {
896 if (client_is_idle(state)) {
897 nidle++;
898 if (!last_access || state->last_access < last_access) {
899 last_access = state->last_access;
900 remove_state = state;
901 }
902 }
903 }
904
905 if (remove_state) {
906 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
907 nidle, remove_state->sock, (unsigned int)remove_state->pid));
908 remove_client(remove_state);
909 return True;
910 }
911
912 return False;
913 }
914
915 struct winbindd_listen_state {
916 bool privileged;
917 int fd;
918 };
919
920 static void winbindd_listen_fde_handler(struct tevent_context *ev,
921 struct tevent_fd *fde,
922 uint16_t flags,
923 void *private_data)
924 {
925 struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
926 struct winbindd_listen_state);
927
928 while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
929 DEBUG(5,("winbindd: Exceeding %d client "
930 "connections, removing idle "
931 "connection.\n", lp_winbind_max_clients()));
932 if (!remove_idle_client()) {
933 DEBUG(0,("winbindd: Exceeding %d "
934 "client connections, no idle "
935 "connection found\n",
936 lp_winbind_max_clients()));
937 break;
938 }
939 }
940 new_connection(s->fd, s->privileged);
941 }
942
943 /*
944 * Winbindd socket accessor functions
945 */
946
947 const char *get_winbind_pipe_dir(void)
948 {
949 return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
950 }
951
952 char *get_winbind_priv_pipe_dir(void)
953 {
954 return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
955 }
956
957 static bool winbindd_setup_listeners(void)
958 {
959 struct winbindd_listen_state *pub_state = NULL;
960 struct winbindd_listen_state *priv_state = NULL;
961 struct tevent_fd *fde;
962
963 pub_state = talloc(winbind_event_context(),
964 struct winbindd_listen_state);
965 if (!pub_state) {
966 goto failed;
967 }
968
969 pub_state->privileged = false;
970 pub_state->fd = create_pipe_sock(
971 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
972 if (pub_state->fd == -1) {
973 goto failed;
974 }
975
976 fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
977 TEVENT_FD_READ, winbindd_listen_fde_handler,
978 pub_state);
979 if (fde == NULL) {
980 close(pub_state->fd);
981 goto failed;
982 }
983 tevent_fd_set_auto_close(fde);
984
985 priv_state = talloc(winbind_event_context(),
986 struct winbindd_listen_state);
987 if (!priv_state) {
988 goto failed;
989 }
990
991 priv_state->privileged = true;
992 priv_state->fd = create_pipe_sock(
993 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
994 if (priv_state->fd == -1) {
995 goto failed;
996 }
997
998 fde = tevent_add_fd(winbind_event_context(), priv_state,
999 priv_state->fd, TEVENT_FD_READ,
1000 winbindd_listen_fde_handler, priv_state);
1001 if (fde == NULL) {
1002 close(priv_state->fd);
1003 goto failed;
1004 }
1005 tevent_fd_set_auto_close(fde);
1006
1007 return true;
1008 failed:
1009 TALLOC_FREE(pub_state);
1010 TALLOC_FREE(priv_state);
1011 return false;
1012 }
1013
1014 bool winbindd_use_idmap_cache(void)
1015 {
1016 return !opt_nocache;
1017 }
1018
1019 bool winbindd_use_cache(void)
1020 {
1021 return !opt_nocache;
1022 }
1023
1024 void winbindd_register_handlers(void)
1025 {
1026 /* Setup signal handlers */
1027
1028 if (!winbindd_setup_sig_term_handler(true))
1029 exit(1);
1030 if (!winbindd_setup_sig_hup_handler(NULL))
1031 exit(1);
1032 if (!winbindd_setup_sig_chld_handler())
1033 exit(1);
1034 if (!winbindd_setup_sig_usr2_handler())
1035 exit(1);
1036
1037 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
1038
1039 /*
1040 * Ensure all cache and idmap caches are consistent
1041 * and initialized before we startup.
1042 */
1043 if (!winbindd_cache_validate_and_initialize()) {
1044 exit(1);
1045 }
1046
1047 /* get broadcast messages */
1048
1049 if (!serverid_register(procid_self(),
1050 FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1051 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1052 exit(1);
1053 }
1054
1055 /* React on 'smbcontrol winbindd reload-config' in the same way
1056 as to SIGHUP signal */
1057 messaging_register(winbind_messaging_context(), NULL,
1058 MSG_SMB_CONF_UPDATED, msg_reload_services);
1059 messaging_register(winbind_messaging_context(), NULL,
1060 MSG_SHUTDOWN, msg_shutdown);
1061
1062 /* Handle online/offline messages. */
1063 messaging_register(winbind_messaging_context(), NULL,
1064 MSG_WINBIND_OFFLINE, winbind_msg_offline);
1065 messaging_register(winbind_messaging_context(), NULL,
1066 MSG_WINBIND_ONLINE, winbind_msg_online);
1067 messaging_register(winbind_messaging_context(), NULL,
1068 MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1069
1070 messaging_register(winbind_messaging_context(), NULL,
1071 MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1072
1073 messaging_register(winbind_messaging_context(), NULL,
1074 MSG_WINBIND_VALIDATE_CACHE,
1075 winbind_msg_validate_cache);
1076
1077 messaging_register(winbind_messaging_context(), NULL,
1078 MSG_WINBIND_DUMP_DOMAIN_LIST,
1079 winbind_msg_dump_domain_list);
1080
1081 messaging_register(winbind_messaging_context(), NULL,
1082 MSG_WINBIND_IP_DROPPED,
1083 winbind_msg_ip_dropped_parent);
1084
1085 /* Register handler for MSG_DEBUG. */
1086 messaging_register(winbind_messaging_context(), NULL,
1087 MSG_DEBUG,
1088 winbind_msg_debug);
1089
1090 netsamlogon_cache_init(); /* Non-critical */
1091
1092 /* clear the cached list of trusted domains */
1093
1094 wcache_tdc_clear();
1095
1096 if (!init_domain_list()) {
1097 DEBUG(0,("unable to initialize domain list\n"));
1098 exit(1);
1099 }
1100
1101 init_idmap_child();
1102 init_locator_child();
1103
1104 smb_nscd_flush_user_cache();
1105 smb_nscd_flush_group_cache();
1106
1107 if (lp_allow_trusted_domains()) {
1108 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1109 rescan_trusted_domains, NULL) == NULL) {
1110 DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1111 exit(1);
1112 }
1113 }
1114
1115 }
1116
1117 struct winbindd_addrchanged_state {
1118 struct addrchange_context *ctx;
1119 struct tevent_context *ev;
1120 struct messaging_context *msg_ctx;
1121 };
1122
1123 static void winbindd_addr_changed(struct tevent_req *req);
1124
1125 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1126 struct tevent_context *ev,
1127 struct messaging_context *msg_ctx)
1128 {
1129 struct winbindd_addrchanged_state *state;
1130 struct tevent_req *req;
1131 NTSTATUS status;
1132
1133 state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1134 if (state == NULL) {
1135 DEBUG(10, ("talloc failed\n"));
1136 return;
1137 }
1138 state->ev = ev;
1139 state->msg_ctx = msg_ctx;
1140
1141 status = addrchange_context_create(state, &state->ctx);
1142 if (!NT_STATUS_IS_OK(status)) {
1143 DEBUG(10, ("addrchange_context_create failed: %s\n",
1144 nt_errstr(status)));
1145 TALLOC_FREE(state);
1146 return;
1147 }
1148 req = addrchange_send(state, ev, state->ctx);
1149 if (req == NULL) {
1150 DEBUG(0, ("addrchange_send failed\n"));
1151 TALLOC_FREE(state);
1152 return;
1153 }
1154 tevent_req_set_callback(req, winbindd_addr_changed, state);
1155 }
1156
1157 static void winbindd_addr_changed(struct tevent_req *req)
1158 {
1159 struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1160 req, struct winbindd_addrchanged_state);
1161 enum addrchange_type type;
1162 struct sockaddr_storage addr;
1163 NTSTATUS status;
1164
1165 status = addrchange_recv(req, &type, &addr);
1166 TALLOC_FREE(req);
1167 if (!NT_STATUS_IS_OK(status)) {
1168 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1169 nt_errstr(status)));
1170 TALLOC_FREE(state);
1171 return;
1172 }
1173 if (type == ADDRCHANGE_DEL) {
1174 char addrstr[INET6_ADDRSTRLEN];
1175 DATA_BLOB blob;
1176
1177 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1178
1179 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1180 addrstr));
1181
1182 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1183
1184 status = messaging_send(state->msg_ctx,
1185 messaging_server_id(state->msg_ctx),
1186 MSG_WINBIND_IP_DROPPED, &blob);
1187 if (!NT_STATUS_IS_OK(status)) {
1188 DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1189 nt_errstr(status)));
1190 }
1191 }
1192 req = addrchange_send(state, state->ev, state->ctx);
1193 if (req == NULL) {
1194 DEBUG(0, ("addrchange_send failed\n"));
1195 TALLOC_FREE(state);
1196 return;
1197 }
1198 tevent_req_set_callback(req, winbindd_addr_changed, state);
1199 }
1200
1201 /* Main function */
1202
1203 int main(int argc, char **argv, char **envp)
1204 {
1205 static bool is_daemon = False;
1206 static bool Fork = True;
1207 static bool log_stdout = False;
1208 static bool no_process_group = False;
1209 enum {
1210 OPT_DAEMON = 1000,
1211 OPT_FORK,
1212 OPT_NO_PROCESS_GROUP,
1213 OPT_LOG_STDOUT
1214 };
1215 struct poptOption long_options[] = {
1216 POPT_AUTOHELP
1217 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1218 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1219 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1220 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1221 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1222 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1223 POPT_COMMON_SAMBA
1224 POPT_TABLEEND
1225 };
1226 poptContext pc;
1227 int opt;
1228 TALLOC_CTX *frame;
1229 NTSTATUS status;
1230
1231 /*
1232 * Do this before any other talloc operation
1233 */
1234 talloc_enable_null_tracking();
1235 frame = talloc_stackframe();
1236
1237 /* glibc (?) likes to print "User defined signal 1" and exit if a
1238 SIGUSR[12] is received before a handler is installed */
1239
1240 CatchSignal(SIGUSR1, SIG_IGN);
1241 CatchSignal(SIGUSR2, SIG_IGN);
1242
1243 fault_setup();
1244 dump_core_setup("winbindd", lp_logfile());
1245
1246 load_case_tables();
1247
1248 /* Initialise for running in non-root mode */
1249
1250 sec_init();
1251
1252 set_remote_machine_name("winbindd", False);
1253
1254 /* Set environment variable so we don't recursively call ourselves.
1255 This may also be useful interactively. */
1256
1257 if ( !winbind_off() ) {
1258 DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
1259 exit(1);
1260 }
1261
1262 /* Initialise samba/rpc client stuff */
1263
1264 pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1265
1266 while ((opt = poptGetNextOpt(pc)) != -1) {
1267 switch (opt) {
1268 /* Don't become a daemon */
1269 case OPT_DAEMON:
1270 is_daemon = True;
1271 break;
1272 case 'i':
1273 interactive = True;
1274 log_stdout = True;
1275 Fork = False;
1276 break;
1277 case OPT_FORK:
1278 Fork = false;
1279 break;
1280 case OPT_NO_PROCESS_GROUP:
1281 no_process_group = true;
1282 break;
1283 case OPT_LOG_STDOUT:
1284 log_stdout = true;
1285 break;
1286 case 'n':
1287 opt_nocache = true;
1288 break;
1289 default:
1290 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1291 poptBadOption(pc, 0), poptStrerror(opt));
1292 poptPrintUsage(pc, stderr, 0);
1293 exit(1);
1294 }
1295 }
1296
1297 if (is_daemon && interactive) {
1298 d_fprintf(stderr,"\nERROR: "
1299 "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1300 poptPrintUsage(pc, stderr, 0);
1301 exit(1);
1302 }
1303
1304 if (log_stdout && Fork) {
1305 d_fprintf(stderr, "\nERROR: "
1306 "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1307 poptPrintUsage(pc, stderr, 0);
1308 exit(1);
1309 }
1310
1311 poptFreeContext(pc);
1312
1313 if (!override_logfile) {
1314 char *lfile = NULL;
1315 if (asprintf(&lfile,"%s/log.winbindd",
1316 get_dyn_LOGFILEBASE()) > 0) {
1317 lp_set_logfile(lfile);
1318 SAFE_FREE(lfile);
1319 }
1320 }
1321 if (log_stdout) {
1322 setup_logging("winbindd", DEBUG_STDOUT);
1323 } else {
1324 setup_logging("winbindd", DEBUG_FILE);
1325 }
1326 reopen_logs();
1327
1328 DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1329 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1330
1331 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1332 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1333 exit(1);
1334 }
1335
1336 /* Initialise messaging system */
1337
1338 if (winbind_messaging_context() == NULL) {
1339 exit(1);
1340 }
1341
1342 if (!reload_services_file(NULL)) {
1343 DEBUG(0, ("error opening config file\n"));
1344 exit(1);
1345 }
1346
1347 if (!directory_exist(lp_lockdir())) {
1348 mkdir(lp_lockdir(), 0755);
1349 }
1350
1351 /* Setup names. */
1352
1353 if (!init_names())
1354 exit(1);
1355
1356 load_interfaces();
1357
1358 if (!secrets_init()) {
1359
1360 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1361 return False;
1362 }
1363
1364 /* Unblock all signals we are interested in as they may have been
1365 blocked by the parent process. */
1366
1367 BlockSignals(False, SIGINT);
1368 BlockSignals(False, SIGQUIT);
1369 BlockSignals(False, SIGTERM);
1370 BlockSignals(False, SIGUSR1);
1371 BlockSignals(False, SIGUSR2);
1372 BlockSignals(False, SIGHUP);
1373 BlockSignals(False, SIGCHLD);
1374
1375 if (!interactive)
1376 become_daemon(Fork, no_process_group, log_stdout);
1377
1378 pidfile_create("winbindd");
1379
1380 #if HAVE_SETPGID
1381 /*
1382 * If we're interactive we want to set our own process group for
1383 * signal management.
1384 */
1385 if (interactive && !no_process_group)
1386 setpgid( (pid_t)0, (pid_t)0);
1387 #endif
1388
1389 TimeInit();
1390
1391 /* Don't use winbindd_reinit_after_fork here as
1392 * we're just starting up and haven't created any
1393 * winbindd-specific resources we must free yet. JRA.
1394 */
1395
1396 status = reinit_after_fork(winbind_messaging_context(),
1397 winbind_event_context(),
1398 procid_self(), false);
1399 if (!NT_STATUS_IS_OK(status)) {
1400 DEBUG(0,("reinit_after_fork() failed\n"));
1401 exit(1);
1402 }
1403
1404 winbindd_register_handlers();
1405
1406 status = init_system_info();
1407 if (!NT_STATUS_IS_OK(status)) {
1408 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1409 nt_errstr(status)));
1410 exit(1);
1411 }
1412
1413 rpc_lsarpc_init(NULL);
1414 rpc_samr_init(NULL);
1415
1416 winbindd_init_addrchange(NULL, winbind_event_context(),
1417 winbind_messaging_context());
1418
1419 /* setup listen sockets */
1420
1421 if (!winbindd_setup_listeners()) {
1422 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1423 exit(1);
1424 }
1425
1426 TALLOC_FREE(frame);
1427 /* Loop waiting for requests */
1428 while (1) {
1429 frame = talloc_stackframe();
1430
1431 if (tevent_loop_once(winbind_event_context()) == -1) {
1432 DEBUG(1, ("tevent_loop_once() failed: %s\n",
1433 strerror(errno)));
1434 return 1;
1435 }
1436
1437 TALLOC_FREE(frame);
1438 }
1439
1440 return 0;
1441 }
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