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s3: Fix uninitialized memory read in talloc_free()
[Samba.git] / source3 / winbindd / winbindd.c
blobf80949dc4e1921eab97354e7bbe642d5aa95f9a6
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 char *fname = lp_configfile();
69
70 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
71 set_dyn_CONFIGFILE(fname);
72 }
73 TALLOC_FREE(fname);
74 }
75
76 /* if this is a child, restore the logfile to the special
77 name - <domain>, idmap, etc. */
78 if (lfile && *lfile) {
79 lp_set_logfile(lfile);
80 }
81
82 reopen_logs();
83 ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
84
85 reopen_logs();
86 load_interfaces();
87
88 return(ret);
89 }
90
91
92 /**************************************************************************** **
93 Handle a fault..
94 **************************************************************************** */
95
96 static void fault_quit(void)
97 {
98 dump_core();
99 }
100
101 static void winbindd_status(void)
102 {
103 struct winbindd_cli_state *tmp;
104
105 DEBUG(0, ("winbindd status:\n"));
106
107 /* Print client state information */
108
109 DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
110
111 if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
112 DEBUG(2, ("\tclient list:\n"));
113 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
114 DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
115 (unsigned long)tmp->pid, tmp->sock,
116 client_is_idle(tmp) ? "idle" : "active"));
117 }
118 }
119 }
120
121 /* Flush client cache */
122
123 static void flush_caches(void)
124 {
125 /* We need to invalidate cached user list entries on a SIGHUP
126 otherwise cached access denied errors due to restrict anonymous
127 hang around until the sequence number changes. */
128
129 if (!wcache_invalidate_cache()) {
130 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
131 if (!winbindd_cache_validate_and_initialize()) {
132 exit(1);
133 }
134 }
135 }
136
137 static void flush_caches_noinit(void)
138 {
139 /*
140 * We need to invalidate cached user list entries on a SIGHUP
141 * otherwise cached access denied errors due to restrict anonymous
142 * hang around until the sequence number changes.
143 * NB
144 * Skip uninitialized domains when flush cache.
145 * If domain is not initialized, it means it is never
146 * used or never become online. look, wcache_invalidate_cache()
147 * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
148 * for unused domains and large traffic for primay domain's DC if there
149 * are many domains..
150 */
151
152 if (!wcache_invalidate_cache_noinit()) {
153 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
154 if (!winbindd_cache_validate_and_initialize()) {
155 exit(1);
156 }
157 }
158 }
159
160 /* Handle the signal by unlinking socket and exiting */
161
162 static void terminate(bool is_parent)
163 {
164 if (is_parent) {
165 /* When parent goes away we should
166 * remove the socket file. Not so
167 * when children terminate.
168 */
169 char *path = NULL;
170
171 if (asprintf(&path, "%s/%s",
172 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
173 unlink(path);
174 SAFE_FREE(path);
175 }
176 }
177
178 idmap_close();
179
180 trustdom_cache_shutdown();
181
182 gencache_stabilize();
183
184 #if 0
185 if (interactive) {
186 TALLOC_CTX *mem_ctx = talloc_init("end_description");
187 char *description = talloc_describe_all(mem_ctx);
188
189 DEBUG(3, ("tallocs left:\n%s\n", description));
190 talloc_destroy(mem_ctx);
191 }
192 #endif
193
194 if (is_parent) {
195 serverid_deregister(procid_self());
196 pidfile_unlink();
197 }
198
199 exit(0);
200 }
201
202 static void winbindd_sig_term_handler(struct tevent_context *ev,
203 struct tevent_signal *se,
204 int signum,
205 int count,
206 void *siginfo,
207 void *private_data)
208 {
209 bool *is_parent = talloc_get_type_abort(private_data, bool);
210
211 DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
212 signum, (int)*is_parent));
213 terminate(*is_parent);
214 }
215
216 bool winbindd_setup_sig_term_handler(bool parent)
217 {
218 struct tevent_signal *se;
219 bool *is_parent;
220
221 is_parent = talloc(winbind_event_context(), bool);
222 if (!is_parent) {
223 return false;
224 }
225
226 *is_parent = parent;
227
228 se = tevent_add_signal(winbind_event_context(),
229 is_parent,
230 SIGTERM, 0,
231 winbindd_sig_term_handler,
232 is_parent);
233 if (!se) {
234 DEBUG(0,("failed to setup SIGTERM handler"));
235 talloc_free(is_parent);
236 return false;
237 }
238
239 se = tevent_add_signal(winbind_event_context(),
240 is_parent,
241 SIGINT, 0,
242 winbindd_sig_term_handler,
243 is_parent);
244 if (!se) {
245 DEBUG(0,("failed to setup SIGINT handler"));
246 talloc_free(is_parent);
247 return false;
248 }
249
250 se = tevent_add_signal(winbind_event_context(),
251 is_parent,
252 SIGQUIT, 0,
253 winbindd_sig_term_handler,
254 is_parent);
255 if (!se) {
256 DEBUG(0,("failed to setup SIGINT handler"));
257 talloc_free(is_parent);
258 return false;
259 }
260
261 return true;
262 }
263
264 static void winbindd_sig_hup_handler(struct tevent_context *ev,
265 struct tevent_signal *se,
266 int signum,
267 int count,
268 void *siginfo,
269 void *private_data)
270 {
271 const char *file = (const char *)private_data;
272
273 DEBUG(1,("Reloading services after SIGHUP\n"));
274 flush_caches_noinit();
275 reload_services_file(file);
276 }
277
278 bool winbindd_setup_sig_hup_handler(const char *lfile)
279 {
280 struct tevent_signal *se;
281 char *file = NULL;
282
283 if (lfile) {
284 file = talloc_strdup(winbind_event_context(),
285 lfile);
286 if (!file) {
287 return false;
288 }
289 }
290
291 se = tevent_add_signal(winbind_event_context(),
292 winbind_event_context(),
293 SIGHUP, 0,
294 winbindd_sig_hup_handler,
295 file);
296 if (!se) {
297 return false;
298 }
299
300 return true;
301 }
302
303 static void winbindd_sig_chld_handler(struct tevent_context *ev,
304 struct tevent_signal *se,
305 int signum,
306 int count,
307 void *siginfo,
308 void *private_data)
309 {
310 pid_t pid;
311
312 while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
313 winbind_child_died(pid);
314 }
315 }
316
317 static bool winbindd_setup_sig_chld_handler(void)
318 {
319 struct tevent_signal *se;
320
321 se = tevent_add_signal(winbind_event_context(),
322 winbind_event_context(),
323 SIGCHLD, 0,
324 winbindd_sig_chld_handler,
325 NULL);
326 if (!se) {
327 return false;
328 }
329
330 return true;
331 }
332
333 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
334 struct tevent_signal *se,
335 int signum,
336 int count,
337 void *siginfo,
338 void *private_data)
339 {
340 winbindd_status();
341 }
342
343 static bool winbindd_setup_sig_usr2_handler(void)
344 {
345 struct tevent_signal *se;
346
347 se = tevent_add_signal(winbind_event_context(),
348 winbind_event_context(),
349 SIGUSR2, 0,
350 winbindd_sig_usr2_handler,
351 NULL);
352 if (!se) {
353 return false;
354 }
355
356 return true;
357 }
358
359 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
360 static void msg_reload_services(struct messaging_context *msg,
361 void *private_data,
362 uint32_t msg_type,
363 struct server_id server_id,
364 DATA_BLOB *data)
365 {
366 /* Flush various caches */
367 flush_caches();
368 reload_services_file((const char *) private_data);
369 }
370
371 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
372 static void msg_shutdown(struct messaging_context *msg,
373 void *private_data,
374 uint32_t msg_type,
375 struct server_id server_id,
376 DATA_BLOB *data)
377 {
378 /* only the parent waits for this message */
379 DEBUG(0,("Got shutdown message\n"));
380 terminate(true);
381 }
382
383
384 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
385 void *private_data,
386 uint32_t msg_type,
387 struct server_id server_id,
388 DATA_BLOB *data)
389 {
390 uint8 ret;
391 pid_t child_pid;
392 NTSTATUS status;
393
394 DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
395 "message.\n"));
396
397 /*
398 * call the validation code from a child:
399 * so we don't block the main winbindd and the validation
400 * code can safely use fork/waitpid...
401 */
402 child_pid = sys_fork();
403
404 if (child_pid == -1) {
405 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
406 strerror(errno)));
407 return;
408 }
409
410 if (child_pid != 0) {
411 /* parent */
412 DEBUG(5, ("winbind_msg_validate_cache: child created with "
413 "pid %d.\n", (int)child_pid));
414 return;
415 }
416
417 /* child */
418
419 status = winbindd_reinit_after_fork(NULL, NULL);
420 if (!NT_STATUS_IS_OK(status)) {
421 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
422 nt_errstr(status)));
423 _exit(0);
424 }
425
426 /* install default SIGCHLD handler: validation code uses fork/waitpid */
427 CatchSignal(SIGCHLD, SIG_DFL);
428
429 ret = (uint8)winbindd_validate_cache_nobackup();
430 DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
431 messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
432 (size_t)1);
433 _exit(0);
434 }
435
436 static struct winbindd_dispatch_table {
437 enum winbindd_cmd cmd;
438 void (*fn)(struct winbindd_cli_state *state);
439 const char *winbindd_cmd_name;
440 } dispatch_table[] = {
441
442 /* Enumeration functions */
443
444 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
445 "LIST_TRUSTDOM" },
446
447 /* Miscellaneous */
448
449 { WINBINDD_INFO, winbindd_info, "INFO" },
450 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
451 "INTERFACE_VERSION" },
452 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
453 { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
454 { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
455 { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
456 { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
457 "WINBINDD_PRIV_PIPE_DIR" },
458
459 /* Credential cache access */
460 { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
461 { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
462
463 /* WINS functions */
464
465 { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
466 { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
467
468 /* End of list */
469
470 { WINBINDD_NUM_CMDS, NULL, "NONE" }
471 };
472
473 struct winbindd_async_dispatch_table {
474 enum winbindd_cmd cmd;
475 const char *cmd_name;
476 struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
477 struct tevent_context *ev,
478 struct winbindd_cli_state *cli,
479 struct winbindd_request *request);
480 NTSTATUS (*recv_req)(struct tevent_req *req,
481 struct winbindd_response *presp);
482 };
483
484 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
485 { WINBINDD_PING, "PING",
486 wb_ping_send, wb_ping_recv },
487 { WINBINDD_LOOKUPSID, "LOOKUPSID",
488 winbindd_lookupsid_send, winbindd_lookupsid_recv },
489 { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
490 winbindd_lookupsids_send, winbindd_lookupsids_recv },
491 { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
492 winbindd_lookupname_send, winbindd_lookupname_recv },
493 { WINBINDD_SID_TO_UID, "SID_TO_UID",
494 winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
495 { WINBINDD_SID_TO_GID, "SID_TO_GID",
496 winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
497 { WINBINDD_UID_TO_SID, "UID_TO_SID",
498 winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
499 { WINBINDD_GID_TO_SID, "GID_TO_SID",
500 winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
501 { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
502 winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
503 { WINBINDD_GETPWSID, "GETPWSID",
504 winbindd_getpwsid_send, winbindd_getpwsid_recv },
505 { WINBINDD_GETPWNAM, "GETPWNAM",
506 winbindd_getpwnam_send, winbindd_getpwnam_recv },
507 { WINBINDD_GETPWUID, "GETPWUID",
508 winbindd_getpwuid_send, winbindd_getpwuid_recv },
509 { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
510 winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
511 { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
512 winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
513 { WINBINDD_GETGROUPS, "GETGROUPS",
514 winbindd_getgroups_send, winbindd_getgroups_recv },
515 { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
516 winbindd_show_sequence_send, winbindd_show_sequence_recv },
517 { WINBINDD_GETGRGID, "GETGRGID",
518 winbindd_getgrgid_send, winbindd_getgrgid_recv },
519 { WINBINDD_GETGRNAM, "GETGRNAM",
520 winbindd_getgrnam_send, winbindd_getgrnam_recv },
521 { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
522 winbindd_getusersids_send, winbindd_getusersids_recv },
523 { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
524 winbindd_lookuprids_send, winbindd_lookuprids_recv },
525 { WINBINDD_SETPWENT, "SETPWENT",
526 winbindd_setpwent_send, winbindd_setpwent_recv },
527 { WINBINDD_GETPWENT, "GETPWENT",
528 winbindd_getpwent_send, winbindd_getpwent_recv },
529 { WINBINDD_ENDPWENT, "ENDPWENT",
530 winbindd_endpwent_send, winbindd_endpwent_recv },
531 { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
532 winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
533 { WINBINDD_GETDCNAME, "GETDCNAME",
534 winbindd_getdcname_send, winbindd_getdcname_recv },
535 { WINBINDD_SETGRENT, "SETGRENT",
536 winbindd_setgrent_send, winbindd_setgrent_recv },
537 { WINBINDD_GETGRENT, "GETGRENT",
538 winbindd_getgrent_send, winbindd_getgrent_recv },
539 { WINBINDD_ENDGRENT, "ENDGRENT",
540 winbindd_endgrent_send, winbindd_endgrent_recv },
541 { WINBINDD_LIST_USERS, "LIST_USERS",
542 winbindd_list_users_send, winbindd_list_users_recv },
543 { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
544 winbindd_list_groups_send, winbindd_list_groups_recv },
545 { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
546 winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
547 { WINBINDD_PING_DC, "PING_DC",
548 winbindd_ping_dc_send, winbindd_ping_dc_recv },
549 { WINBINDD_PAM_AUTH, "PAM_AUTH",
550 winbindd_pam_auth_send, winbindd_pam_auth_recv },
551 { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
552 winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
553 { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
554 winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
555 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
556 winbindd_pam_chng_pswd_auth_crap_send,
557 winbindd_pam_chng_pswd_auth_crap_recv },
558
559 { 0, NULL, NULL, NULL }
560 };
561
562 static struct winbindd_async_dispatch_table async_priv_table[] = {
563 { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
564 winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
565 { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
566 winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
567 { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
568 winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
569 { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
570 winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
571
572 { 0, NULL, NULL, NULL }
573 };
574
575 static void wb_request_done(struct tevent_req *req);
576
577 static void process_request(struct winbindd_cli_state *state)
578 {
579 struct winbindd_dispatch_table *table = dispatch_table;
580 struct winbindd_async_dispatch_table *atable;
581
582 state->mem_ctx = talloc_named(state, 0, "winbind request");
583 if (state->mem_ctx == NULL)
584 return;
585
586 /* Remember who asked us. */
587 state->pid = state->request->pid;
588
589 state->cmd_name = "unknown request";
590 state->recv_fn = NULL;
591
592 /* Process command */
593
594 for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
595 if (state->request->cmd == atable->cmd) {
596 break;
597 }
598 }
599
600 if ((atable->send_req == NULL) && state->privileged) {
601 for (atable = async_priv_table; atable->send_req;
602 atable += 1) {
603 if (state->request->cmd == atable->cmd) {
604 break;
605 }
606 }
607 }
608
609 if (atable->send_req != NULL) {
610 struct tevent_req *req;
611
612 state->cmd_name = atable->cmd_name;
613 state->recv_fn = atable->recv_req;
614
615 DEBUG(10, ("process_request: Handling async request %d:%s\n",
616 (int)state->pid, state->cmd_name));
617
618 req = atable->send_req(state->mem_ctx, winbind_event_context(),
619 state, state->request);
620 if (req == NULL) {
621 DEBUG(0, ("process_request: atable->send failed for "
622 "%s\n", atable->cmd_name));
623 request_error(state);
624 return;
625 }
626 tevent_req_set_callback(req, wb_request_done, state);
627 return;
628 }
629
630 state->response = talloc_zero(state->mem_ctx,
631 struct winbindd_response);
632 if (state->response == NULL) {
633 DEBUG(10, ("talloc failed\n"));
634 remove_client(state);
635 return;
636 }
637 state->response->result = WINBINDD_PENDING;
638 state->response->length = sizeof(struct winbindd_response);
639
640 for (table = dispatch_table; table->fn; table++) {
641 if (state->request->cmd == table->cmd) {
642 DEBUG(10,("process_request: request fn %s\n",
643 table->winbindd_cmd_name ));
644 state->cmd_name = table->winbindd_cmd_name;
645 table->fn(state);
646 break;
647 }
648 }
649
650 if (!table->fn) {
651 DEBUG(10,("process_request: unknown request fn number %d\n",
652 (int)state->request->cmd ));
653 request_error(state);
654 }
655 }
656
657 static void wb_request_done(struct tevent_req *req)
658 {
659 struct winbindd_cli_state *state = tevent_req_callback_data(
660 req, struct winbindd_cli_state);
661 NTSTATUS status;
662
663 state->response = talloc_zero(state->mem_ctx,
664 struct winbindd_response);
665 if (state->response == NULL) {
666 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
667 (int)state->pid, state->cmd_name));
668 remove_client(state);
669 return;
670 }
671 state->response->result = WINBINDD_PENDING;
672 state->response->length = sizeof(struct winbindd_response);
673
674 status = state->recv_fn(req, state->response);
675 TALLOC_FREE(req);
676
677 DEBUG(10,("wb_request_done[%d:%s]: %s\n",
678 (int)state->pid, state->cmd_name, nt_errstr(status)));
679
680 if (!NT_STATUS_IS_OK(status)) {
681 request_error(state);
682 return;
683 }
684 request_ok(state);
685 }
686
687 /*
688 * This is the main event loop of winbind requests. It goes through a
689 * state-machine of 3 read/write requests, 4 if you have extra data to send.
690 *
691 * An idle winbind client has a read request of 4 bytes outstanding,
692 * finalizing function is request_len_recv, checking the length. request_recv
693 * then processes the packet. The processing function then at some point has
694 * to call request_finished which schedules sending the response.
695 */
696
697 static void request_finished(struct winbindd_cli_state *state);
698
699 static void winbind_client_request_read(struct tevent_req *req);
700 static void winbind_client_response_written(struct tevent_req *req);
701
702 static void request_finished(struct winbindd_cli_state *state)
703 {
704 struct tevent_req *req;
705
706 TALLOC_FREE(state->request);
707
708 req = wb_resp_write_send(state, winbind_event_context(),
709 state->out_queue, state->sock,
710 state->response);
711 if (req == NULL) {
712 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
713 (int)state->pid, state->cmd_name));
714 remove_client(state);
715 return;
716 }
717 tevent_req_set_callback(req, winbind_client_response_written, state);
718 }
719
720 static void winbind_client_response_written(struct tevent_req *req)
721 {
722 struct winbindd_cli_state *state = tevent_req_callback_data(
723 req, struct winbindd_cli_state);
724 ssize_t ret;
725 int err;
726
727 ret = wb_resp_write_recv(req, &err);
728 TALLOC_FREE(req);
729 if (ret == -1) {
730 close(state->sock);
731 state->sock = -1;
732 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
733 (int)state->pid, state->cmd_name, strerror(err)));
734 remove_client(state);
735 return;
736 }
737
738 DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
739 "to client\n", (int)state->pid, state->cmd_name));
740
741 TALLOC_FREE(state->mem_ctx);
742 state->response = NULL;
743 state->cmd_name = "no request";
744 state->recv_fn = NULL;
745
746 req = wb_req_read_send(state, winbind_event_context(), state->sock,
747 WINBINDD_MAX_EXTRA_DATA);
748 if (req == NULL) {
749 remove_client(state);
750 return;
751 }
752 tevent_req_set_callback(req, winbind_client_request_read, state);
753 }
754
755 void request_error(struct winbindd_cli_state *state)
756 {
757 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
758 state->response->result = WINBINDD_ERROR;
759 request_finished(state);
760 }
761
762 void request_ok(struct winbindd_cli_state *state)
763 {
764 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
765 state->response->result = WINBINDD_OK;
766 request_finished(state);
767 }
768
769 /* Process a new connection by adding it to the client connection list */
770
771 static void new_connection(int listen_sock, bool privileged)
772 {
773 struct sockaddr_un sunaddr;
774 struct winbindd_cli_state *state;
775 struct tevent_req *req;
776 socklen_t len;
777 int sock;
778
779 /* Accept connection */
780
781 len = sizeof(sunaddr);
782
783 sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
784
785 if (sock == -1) {
786 if (errno != EINTR) {
787 DEBUG(0, ("Faild to accept socket - %s\n",
788 strerror(errno)));
789 }
790 return;
791 }
792
793 DEBUG(6,("accepted socket %d\n", sock));
794
795 /* Create new connection structure */
796
797 if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
798 close(sock);
799 return;
800 }
801
802 state->sock = sock;
803
804 state->out_queue = tevent_queue_create(state, "winbind client reply");
805 if (state->out_queue == NULL) {
806 close(sock);
807 TALLOC_FREE(state);
808 return;
809 }
810
811 state->last_access = time(NULL);
812
813 state->privileged = privileged;
814
815 req = wb_req_read_send(state, winbind_event_context(), state->sock,
816 WINBINDD_MAX_EXTRA_DATA);
817 if (req == NULL) {
818 TALLOC_FREE(state);
819 close(sock);
820 return;
821 }
822 tevent_req_set_callback(req, winbind_client_request_read, state);
823
824 /* Add to connection list */
825
826 winbindd_add_client(state);
827 }
828
829 static void winbind_client_request_read(struct tevent_req *req)
830 {
831 struct winbindd_cli_state *state = tevent_req_callback_data(
832 req, struct winbindd_cli_state);
833 ssize_t ret;
834 int err;
835
836 ret = wb_req_read_recv(req, state, &state->request, &err);
837 TALLOC_FREE(req);
838 if (ret == -1) {
839 if (err == EPIPE) {
840 DEBUG(6, ("closing socket %d, client exited\n",
841 state->sock));
842 } else {
843 DEBUG(2, ("Could not read client request from fd %d: "
844 "%s\n", state->sock, strerror(err)));
845 }
846 close(state->sock);
847 state->sock = -1;
848 remove_client(state);
849 return;
850 }
851 process_request(state);
852 }
853
854 /* Remove a client connection from client connection list */
855
856 static void remove_client(struct winbindd_cli_state *state)
857 {
858 char c = 0;
859 int nwritten;
860
861 /* It's a dead client - hold a funeral */
862
863 if (state == NULL) {
864 return;
865 }
866
867 if (state->sock != -1) {
868 /* tell client, we are closing ... */
869 nwritten = write(state->sock, &c, sizeof(c));
870 if (nwritten == -1) {
871 DEBUG(2, ("final write to client failed: %s\n",
872 strerror(errno)));
873 }
874
875 /* Close socket */
876
877 close(state->sock);
878 state->sock = -1;
879 }
880
881 TALLOC_FREE(state->mem_ctx);
882
883 /* Remove from list and free */
884
885 winbindd_remove_client(state);
886 TALLOC_FREE(state);
887 }
888
889 /* Is a client idle? */
890
891 static bool client_is_idle(struct winbindd_cli_state *state) {
892 return (state->response == NULL &&
893 !state->pwent_state && !state->grent_state);
894 }
895
896 /* Shutdown client connection which has been idle for the longest time */
897
898 static bool remove_idle_client(void)
899 {
900 struct winbindd_cli_state *state, *remove_state = NULL;
901 time_t last_access = 0;
902 int nidle = 0;
903
904 for (state = winbindd_client_list(); state; state = state->next) {
905 if (client_is_idle(state)) {
906 nidle++;
907 if (!last_access || state->last_access < last_access) {
908 last_access = state->last_access;
909 remove_state = state;
910 }
911 }
912 }
913
914 if (remove_state) {
915 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
916 nidle, remove_state->sock, (unsigned int)remove_state->pid));
917 remove_client(remove_state);
918 return True;
919 }
920
921 return False;
922 }
923
924 struct winbindd_listen_state {
925 bool privileged;
926 int fd;
927 };
928
929 static void winbindd_listen_fde_handler(struct tevent_context *ev,
930 struct tevent_fd *fde,
931 uint16_t flags,
932 void *private_data)
933 {
934 struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
935 struct winbindd_listen_state);
936
937 while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
938 DEBUG(5,("winbindd: Exceeding %d client "
939 "connections, removing idle "
940 "connection.\n", lp_winbind_max_clients()));
941 if (!remove_idle_client()) {
942 DEBUG(0,("winbindd: Exceeding %d "
943 "client connections, no idle "
944 "connection found\n",
945 lp_winbind_max_clients()));
946 break;
947 }
948 }
949 new_connection(s->fd, s->privileged);
950 }
951
952 /*
953 * Winbindd socket accessor functions
954 */
955
956 const char *get_winbind_pipe_dir(void)
957 {
958 return lp_parm_const_string(-1, "winbindd", "socket dir", WINBINDD_SOCKET_DIR);
959 }
960
961 char *get_winbind_priv_pipe_dir(void)
962 {
963 return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
964 }
965
966 static bool winbindd_setup_listeners(void)
967 {
968 struct winbindd_listen_state *pub_state = NULL;
969 struct winbindd_listen_state *priv_state = NULL;
970 struct tevent_fd *fde;
971
972 pub_state = talloc(winbind_event_context(),
973 struct winbindd_listen_state);
974 if (!pub_state) {
975 goto failed;
976 }
977
978 pub_state->privileged = false;
979 pub_state->fd = create_pipe_sock(
980 get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME, 0755);
981 if (pub_state->fd == -1) {
982 goto failed;
983 }
984
985 fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
986 TEVENT_FD_READ, winbindd_listen_fde_handler,
987 pub_state);
988 if (fde == NULL) {
989 close(pub_state->fd);
990 goto failed;
991 }
992 tevent_fd_set_auto_close(fde);
993
994 priv_state = talloc(winbind_event_context(),
995 struct winbindd_listen_state);
996 if (!priv_state) {
997 goto failed;
998 }
999
1000 priv_state->privileged = true;
1001 priv_state->fd = create_pipe_sock(
1002 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1003 if (priv_state->fd == -1) {
1004 goto failed;
1005 }
1006
1007 fde = tevent_add_fd(winbind_event_context(), priv_state,
1008 priv_state->fd, TEVENT_FD_READ,
1009 winbindd_listen_fde_handler, priv_state);
1010 if (fde == NULL) {
1011 close(priv_state->fd);
1012 goto failed;
1013 }
1014 tevent_fd_set_auto_close(fde);
1015
1016 return true;
1017 failed:
1018 TALLOC_FREE(pub_state);
1019 TALLOC_FREE(priv_state);
1020 return false;
1021 }
1022
1023 bool winbindd_use_idmap_cache(void)
1024 {
1025 return !opt_nocache;
1026 }
1027
1028 bool winbindd_use_cache(void)
1029 {
1030 return !opt_nocache;
1031 }
1032
1033 void winbindd_register_handlers(void)
1034 {
1035 /* Setup signal handlers */
1036
1037 if (!winbindd_setup_sig_term_handler(true))
1038 exit(1);
1039 if (!winbindd_setup_sig_hup_handler(NULL))
1040 exit(1);
1041 if (!winbindd_setup_sig_chld_handler())
1042 exit(1);
1043 if (!winbindd_setup_sig_usr2_handler())
1044 exit(1);
1045
1046 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
1047
1048 /*
1049 * Ensure all cache and idmap caches are consistent
1050 * and initialized before we startup.
1051 */
1052 if (!winbindd_cache_validate_and_initialize()) {
1053 exit(1);
1054 }
1055
1056 /* get broadcast messages */
1057
1058 if (!serverid_register(procid_self(),
1059 FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
1060 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1061 exit(1);
1062 }
1063
1064 /* React on 'smbcontrol winbindd reload-config' in the same way
1065 as to SIGHUP signal */
1066 messaging_register(winbind_messaging_context(), NULL,
1067 MSG_SMB_CONF_UPDATED, msg_reload_services);
1068 messaging_register(winbind_messaging_context(), NULL,
1069 MSG_SHUTDOWN, msg_shutdown);
1070
1071 /* Handle online/offline messages. */
1072 messaging_register(winbind_messaging_context(), NULL,
1073 MSG_WINBIND_OFFLINE, winbind_msg_offline);
1074 messaging_register(winbind_messaging_context(), NULL,
1075 MSG_WINBIND_ONLINE, winbind_msg_online);
1076 messaging_register(winbind_messaging_context(), NULL,
1077 MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1078
1079 messaging_register(winbind_messaging_context(), NULL,
1080 MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1081
1082 messaging_register(winbind_messaging_context(), NULL,
1083 MSG_WINBIND_VALIDATE_CACHE,
1084 winbind_msg_validate_cache);
1085
1086 messaging_register(winbind_messaging_context(), NULL,
1087 MSG_WINBIND_DUMP_DOMAIN_LIST,
1088 winbind_msg_dump_domain_list);
1089
1090 messaging_register(winbind_messaging_context(), NULL,
1091 MSG_WINBIND_IP_DROPPED,
1092 winbind_msg_ip_dropped_parent);
1093
1094 /* Register handler for MSG_DEBUG. */
1095 messaging_register(winbind_messaging_context(), NULL,
1096 MSG_DEBUG,
1097 winbind_msg_debug);
1098
1099 netsamlogon_cache_init(); /* Non-critical */
1100
1101 /* clear the cached list of trusted domains */
1102
1103 wcache_tdc_clear();
1104
1105 if (!init_domain_list()) {
1106 DEBUG(0,("unable to initialize domain list\n"));
1107 exit(1);
1108 }
1109
1110 init_idmap_child();
1111 init_locator_child();
1112
1113 smb_nscd_flush_user_cache();
1114 smb_nscd_flush_group_cache();
1115
1116 if (lp_allow_trusted_domains()) {
1117 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1118 rescan_trusted_domains, NULL) == NULL) {
1119 DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1120 exit(1);
1121 }
1122 }
1123
1124 }
1125
1126 struct winbindd_addrchanged_state {
1127 struct addrchange_context *ctx;
1128 struct tevent_context *ev;
1129 struct messaging_context *msg_ctx;
1130 };
1131
1132 static void winbindd_addr_changed(struct tevent_req *req);
1133
1134 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1135 struct tevent_context *ev,
1136 struct messaging_context *msg_ctx)
1137 {
1138 struct winbindd_addrchanged_state *state;
1139 struct tevent_req *req;
1140 NTSTATUS status;
1141
1142 state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1143 if (state == NULL) {
1144 DEBUG(10, ("talloc failed\n"));
1145 return;
1146 }
1147 state->ev = ev;
1148 state->msg_ctx = msg_ctx;
1149
1150 status = addrchange_context_create(state, &state->ctx);
1151 if (!NT_STATUS_IS_OK(status)) {
1152 DEBUG(10, ("addrchange_context_create failed: %s\n",
1153 nt_errstr(status)));
1154 TALLOC_FREE(state);
1155 return;
1156 }
1157 req = addrchange_send(state, ev, state->ctx);
1158 if (req == NULL) {
1159 DEBUG(0, ("addrchange_send failed\n"));
1160 TALLOC_FREE(state);
1161 return;
1162 }
1163 tevent_req_set_callback(req, winbindd_addr_changed, state);
1164 }
1165
1166 static void winbindd_addr_changed(struct tevent_req *req)
1167 {
1168 struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1169 req, struct winbindd_addrchanged_state);
1170 enum addrchange_type type;
1171 struct sockaddr_storage addr;
1172 NTSTATUS status;
1173
1174 status = addrchange_recv(req, &type, &addr);
1175 TALLOC_FREE(req);
1176 if (!NT_STATUS_IS_OK(status)) {
1177 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1178 nt_errstr(status)));
1179 TALLOC_FREE(state);
1180 return;
1181 }
1182 if (type == ADDRCHANGE_DEL) {
1183 char addrstr[INET6_ADDRSTRLEN];
1184 DATA_BLOB blob;
1185
1186 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1187
1188 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1189 addrstr));
1190
1191 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1192
1193 status = messaging_send(state->msg_ctx,
1194 messaging_server_id(state->msg_ctx),
1195 MSG_WINBIND_IP_DROPPED, &blob);
1196 if (!NT_STATUS_IS_OK(status)) {
1197 DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1198 nt_errstr(status)));
1199 }
1200 }
1201 req = addrchange_send(state, state->ev, state->ctx);
1202 if (req == NULL) {
1203 DEBUG(0, ("addrchange_send failed\n"));
1204 TALLOC_FREE(state);
1205 return;
1206 }
1207 tevent_req_set_callback(req, winbindd_addr_changed, state);
1208 }
1209
1210 /* Main function */
1211
1212 int main(int argc, char **argv, char **envp)
1213 {
1214 static bool is_daemon = False;
1215 static bool Fork = True;
1216 static bool log_stdout = False;
1217 static bool no_process_group = False;
1218 enum {
1219 OPT_DAEMON = 1000,
1220 OPT_FORK,
1221 OPT_NO_PROCESS_GROUP,
1222 OPT_LOG_STDOUT
1223 };
1224 struct poptOption long_options[] = {
1225 POPT_AUTOHELP
1226 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1227 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1228 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1229 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1230 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1231 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1232 POPT_COMMON_SAMBA
1233 POPT_TABLEEND
1234 };
1235 poptContext pc;
1236 int opt;
1237 TALLOC_CTX *frame;
1238 NTSTATUS status;
1239
1240 /*
1241 * Do this before any other talloc operation
1242 */
1243 talloc_enable_null_tracking();
1244 frame = talloc_stackframe();
1245
1246 /* glibc (?) likes to print "User defined signal 1" and exit if a
1247 SIGUSR[12] is received before a handler is installed */
1248
1249 CatchSignal(SIGUSR1, SIG_IGN);
1250 CatchSignal(SIGUSR2, SIG_IGN);
1251
1252 fault_setup((void (*)(void *))fault_quit );
1253 dump_core_setup("winbindd");
1254
1255 load_case_tables();
1256
1257 /* Initialise for running in non-root mode */
1258
1259 sec_init();
1260
1261 set_remote_machine_name("winbindd", False);
1262
1263 /* Set environment variable so we don't recursively call ourselves.
1264 This may also be useful interactively. */
1265
1266 if ( !winbind_off() ) {
1267 DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
1268 exit(1);
1269 }
1270
1271 /* Initialise samba/rpc client stuff */
1272
1273 pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
1274
1275 while ((opt = poptGetNextOpt(pc)) != -1) {
1276 switch (opt) {
1277 /* Don't become a daemon */
1278 case OPT_DAEMON:
1279 is_daemon = True;
1280 break;
1281 case 'i':
1282 interactive = True;
1283 log_stdout = True;
1284 Fork = False;
1285 break;
1286 case OPT_FORK:
1287 Fork = false;
1288 break;
1289 case OPT_NO_PROCESS_GROUP:
1290 no_process_group = true;
1291 break;
1292 case OPT_LOG_STDOUT:
1293 log_stdout = true;
1294 break;
1295 case 'n':
1296 opt_nocache = true;
1297 break;
1298 default:
1299 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1300 poptBadOption(pc, 0), poptStrerror(opt));
1301 poptPrintUsage(pc, stderr, 0);
1302 exit(1);
1303 }
1304 }
1305
1306 if (is_daemon && interactive) {
1307 d_fprintf(stderr,"\nERROR: "
1308 "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1309 poptPrintUsage(pc, stderr, 0);
1310 exit(1);
1311 }
1312
1313 if (log_stdout && Fork) {
1314 d_fprintf(stderr, "\nERROR: "
1315 "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1316 poptPrintUsage(pc, stderr, 0);
1317 exit(1);
1318 }
1319
1320 poptFreeContext(pc);
1321
1322 if (!override_logfile) {
1323 char *lfile = NULL;
1324 if (asprintf(&lfile,"%s/log.winbindd",
1325 get_dyn_LOGFILEBASE()) > 0) {
1326 lp_set_logfile(lfile);
1327 SAFE_FREE(lfile);
1328 }
1329 }
1330 if (log_stdout) {
1331 setup_logging("winbindd", DEBUG_STDOUT);
1332 } else {
1333 setup_logging("winbindd", DEBUG_FILE);
1334 }
1335 reopen_logs();
1336
1337 DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1338 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1339
1340 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1341 DEBUG(0, ("error opening config file\n"));
1342 exit(1);
1343 }
1344
1345 /* Initialise messaging system */
1346
1347 if (winbind_messaging_context() == NULL) {
1348 exit(1);
1349 }
1350
1351 if (!reload_services_file(NULL)) {
1352 DEBUG(0, ("error opening config file\n"));
1353 exit(1);
1354 }
1355
1356 if (!directory_exist(lp_lockdir())) {
1357 mkdir(lp_lockdir(), 0755);
1358 }
1359
1360 /* Setup names. */
1361
1362 if (!init_names())
1363 exit(1);
1364
1365 load_interfaces();
1366
1367 if (!secrets_init()) {
1368
1369 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1370 return False;
1371 }
1372
1373 /* Unblock all signals we are interested in as they may have been
1374 blocked by the parent process. */
1375
1376 BlockSignals(False, SIGINT);
1377 BlockSignals(False, SIGQUIT);
1378 BlockSignals(False, SIGTERM);
1379 BlockSignals(False, SIGUSR1);
1380 BlockSignals(False, SIGUSR2);
1381 BlockSignals(False, SIGHUP);
1382 BlockSignals(False, SIGCHLD);
1383
1384 if (!interactive)
1385 become_daemon(Fork, no_process_group, log_stdout);
1386
1387 pidfile_create("winbindd");
1388
1389 #if HAVE_SETPGID
1390 /*
1391 * If we're interactive we want to set our own process group for
1392 * signal management.
1393 */
1394 if (interactive && !no_process_group)
1395 setpgid( (pid_t)0, (pid_t)0);
1396 #endif
1397
1398 TimeInit();
1399
1400 /* Don't use winbindd_reinit_after_fork here as
1401 * we're just starting up and haven't created any
1402 * winbindd-specific resources we must free yet. JRA.
1403 */
1404
1405 status = reinit_after_fork(winbind_messaging_context(),
1406 winbind_event_context(),
1407 procid_self(), false);
1408 if (!NT_STATUS_IS_OK(status)) {
1409 DEBUG(0,("reinit_after_fork() failed\n"));
1410 exit(1);
1411 }
1412
1413 winbindd_register_handlers();
1414
1415 status = init_system_info();
1416 if (!NT_STATUS_IS_OK(status)) {
1417 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1418 nt_errstr(status)));
1419 exit(1);
1420 }
1421
1422 rpc_lsarpc_init(NULL);
1423 rpc_samr_init(NULL);
1424
1425 winbindd_init_addrchange(NULL, winbind_event_context(),
1426 winbind_messaging_context());
1427
1428 /* setup listen sockets */
1429
1430 if (!winbindd_setup_listeners()) {
1431 DEBUG(0,("winbindd_setup_listeners() failed\n"));
1432 exit(1);
1433 }
1434
1435 TALLOC_FREE(frame);
1436 /* Loop waiting for requests */
1437 while (1) {
1438 frame = talloc_stackframe();
1439
1440 if (tevent_loop_once(winbind_event_context()) == -1) {
1441 DEBUG(1, ("tevent_loop_once() failed: %s\n",
1442 strerror(errno)));
1443 return 1;
1444 }
1445
1446 TALLOC_FREE(frame);
1447 }
1448
1449 return 0;
1450 }
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