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smbd: Rename lck2->rw_probe in brl_conflict_other
[Samba.git] / source3 / winbindd / winbindd.c
blobcb6164674f00be8e42b6091b822c4d1caa2e8db9
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 "rpc_client/cli_netlogon.h"
35 #include "idmap.h"
36 #include "lib/addrchange.h"
37 #include "serverid.h"
38 #include "auth.h"
39 #include "messages.h"
40 #include "../lib/util/pidfile.h"
41 #include "util_cluster.h"
42 #include "source4/lib/messaging/irpc.h"
43 #include "source4/lib/messaging/messaging.h"
44 #include "lib/param/param.h"
45
46 #undef DBGC_CLASS
47 #define DBGC_CLASS DBGC_WINBIND
48
49 static bool client_is_idle(struct winbindd_cli_state *state);
50 static void remove_client(struct winbindd_cli_state *state);
51
52 static bool opt_nocache = False;
53 static bool interactive = False;
54
55 extern bool override_logfile;
56
57 struct tevent_context *winbind_event_context(void)
58 {
59 static struct tevent_context *ev = NULL;
60
61 if (ev != NULL) {
62 return ev;
63 }
64
65 /*
66 * Note we MUST use the NULL context here, not the autofree context,
67 * to avoid side effects in forked children exiting.
68 */
69 ev = samba_tevent_context_init(NULL);
70 if (ev == NULL) {
71 smb_panic("Could not init winbindd's messaging context.\n");
72 }
73 return ev;
74 }
75
76 struct messaging_context *winbind_messaging_context(void)
77 {
78 static struct messaging_context *msg = NULL;
79
80 if (msg != NULL) {
81 return msg;
82 }
83
84 /*
85 * Note we MUST use the NULL context here, not the autofree context,
86 * to avoid side effects in forked children exiting.
87 */
88 msg = messaging_init(NULL, winbind_event_context());
89 if (msg == NULL) {
90 smb_panic("Could not init winbindd's messaging context.\n");
91 }
92 return msg;
93 }
94
95 struct imessaging_context *winbind_imessaging_context(void)
96 {
97 static struct imessaging_context *msg = NULL;
98 struct loadparm_context *lp_ctx;
99
100 if (msg != NULL) {
101 return msg;
102 }
103
104 lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
105 if (lp_ctx == NULL) {
106 smb_panic("Could not load smb.conf to init winbindd's imessaging context.\n");
107 }
108
109 /*
110 * Note we MUST use the NULL context here, not the autofree context,
111 * to avoid side effects in forked children exiting.
112 */
113 msg = imessaging_init(NULL, lp_ctx, procid_self(), winbind_event_context(), false);
114 talloc_unlink(NULL, lp_ctx);
115
116 if (msg == NULL) {
117 smb_panic("Could not init winbindd's messaging context.\n");
118 }
119 return msg;
120 }
121
122 /* Reload configuration */
123
124 static bool reload_services_file(const char *lfile)
125 {
126 bool ret;
127
128 if (lp_loaded()) {
129 char *fname = lp_next_configfile(talloc_tos());
130
131 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
132 set_dyn_CONFIGFILE(fname);
133 }
134 TALLOC_FREE(fname);
135 }
136
137 /* if this is a child, restore the logfile to the special
138 name - <domain>, idmap, etc. */
139 if (lfile && *lfile) {
140 lp_set_logfile(lfile);
141 }
142
143 reopen_logs();
144 ret = lp_load_global(get_dyn_CONFIGFILE());
145
146 reopen_logs();
147 load_interfaces();
148
149 return(ret);
150 }
151
152
153 static void winbindd_status(void)
154 {
155 struct winbindd_cli_state *tmp;
156
157 DEBUG(0, ("winbindd status:\n"));
158
159 /* Print client state information */
160
161 DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
162
163 if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
164 DEBUG(2, ("\tclient list:\n"));
165 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
166 DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
167 (unsigned long)tmp->pid, tmp->sock,
168 client_is_idle(tmp) ? "idle" : "active"));
169 }
170 }
171 }
172
173 /* Flush client cache */
174
175 static void flush_caches(void)
176 {
177 /* We need to invalidate cached user list entries on a SIGHUP
178 otherwise cached access denied errors due to restrict anonymous
179 hang around until the sequence number changes. */
180
181 if (!wcache_invalidate_cache()) {
182 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
183 if (!winbindd_cache_validate_and_initialize()) {
184 exit(1);
185 }
186 }
187 }
188
189 static void flush_caches_noinit(void)
190 {
191 /*
192 * We need to invalidate cached user list entries on a SIGHUP
193 * otherwise cached access denied errors due to restrict anonymous
194 * hang around until the sequence number changes.
195 * NB
196 * Skip uninitialized domains when flush cache.
197 * If domain is not initialized, it means it is never
198 * used or never become online. look, wcache_invalidate_cache()
199 * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
200 * for unused domains and large traffic for primay domain's DC if there
201 * are many domains..
202 */
203
204 if (!wcache_invalidate_cache_noinit()) {
205 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
206 if (!winbindd_cache_validate_and_initialize()) {
207 exit(1);
208 }
209 }
210 }
211
212 /* Handle the signal by unlinking socket and exiting */
213
214 static void terminate(bool is_parent)
215 {
216 if (is_parent) {
217 /* When parent goes away we should
218 * remove the socket file. Not so
219 * when children terminate.
220 */
221 char *path = NULL;
222
223 if (asprintf(&path, "%s/%s",
224 lp_winbindd_socket_directory(), WINBINDD_SOCKET_NAME) > 0) {
225 unlink(path);
226 SAFE_FREE(path);
227 }
228 }
229
230 idmap_close();
231
232 trustdom_cache_shutdown();
233
234 gencache_stabilize();
235
236 #if 0
237 if (interactive) {
238 TALLOC_CTX *mem_ctx = talloc_init("end_description");
239 char *description = talloc_describe_all(mem_ctx);
240
241 DEBUG(3, ("tallocs left:\n%s\n", description));
242 talloc_destroy(mem_ctx);
243 }
244 #endif
245
246 if (is_parent) {
247 struct messaging_context *msg = winbind_messaging_context();
248 struct server_id self = messaging_server_id(msg);
249 serverid_deregister(self);
250 pidfile_unlink(lp_pid_directory(), "winbindd");
251 }
252
253 exit(0);
254 }
255
256 static void winbindd_sig_term_handler(struct tevent_context *ev,
257 struct tevent_signal *se,
258 int signum,
259 int count,
260 void *siginfo,
261 void *private_data)
262 {
263 bool *is_parent = talloc_get_type_abort(private_data, bool);
264
265 DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
266 signum, (int)*is_parent));
267 terminate(*is_parent);
268 }
269
270 /*
271 handle stdin becoming readable when we are in --foreground mode
272 */
273 static void winbindd_stdin_handler(struct tevent_context *ev,
274 struct tevent_fd *fde,
275 uint16_t flags,
276 void *private_data)
277 {
278 char c;
279 if (read(0, &c, 1) != 1) {
280 bool *is_parent = talloc_get_type_abort(private_data, bool);
281
282 /* we have reached EOF on stdin, which means the
283 parent has exited. Shutdown the server */
284 DEBUG(0,("EOF on stdin (is_parent=%d)\n",
285 (int)*is_parent));
286 terminate(*is_parent);
287 }
288 }
289
290 bool winbindd_setup_sig_term_handler(bool parent)
291 {
292 struct tevent_signal *se;
293 bool *is_parent;
294
295 is_parent = talloc(winbind_event_context(), bool);
296 if (!is_parent) {
297 return false;
298 }
299
300 *is_parent = parent;
301
302 se = tevent_add_signal(winbind_event_context(),
303 is_parent,
304 SIGTERM, 0,
305 winbindd_sig_term_handler,
306 is_parent);
307 if (!se) {
308 DEBUG(0,("failed to setup SIGTERM handler"));
309 talloc_free(is_parent);
310 return false;
311 }
312
313 se = tevent_add_signal(winbind_event_context(),
314 is_parent,
315 SIGINT, 0,
316 winbindd_sig_term_handler,
317 is_parent);
318 if (!se) {
319 DEBUG(0,("failed to setup SIGINT handler"));
320 talloc_free(is_parent);
321 return false;
322 }
323
324 se = tevent_add_signal(winbind_event_context(),
325 is_parent,
326 SIGQUIT, 0,
327 winbindd_sig_term_handler,
328 is_parent);
329 if (!se) {
330 DEBUG(0,("failed to setup SIGINT handler"));
331 talloc_free(is_parent);
332 return false;
333 }
334
335 return true;
336 }
337
338 bool winbindd_setup_stdin_handler(bool parent, bool foreground)
339 {
340 bool *is_parent;
341
342 if (foreground) {
343 struct stat st;
344
345 is_parent = talloc(winbind_event_context(), bool);
346 if (!is_parent) {
347 return false;
348 }
349
350 *is_parent = parent;
351
352 /* if we are running in the foreground then look for
353 EOF on stdin, and exit if it happens. This allows
354 us to die if the parent process dies
355 Only do this on a pipe or socket, no other device.
356 */
357 if (fstat(0, &st) != 0) {
358 return false;
359 }
360 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
361 tevent_add_fd(winbind_event_context(),
362 is_parent,
363 0,
364 TEVENT_FD_READ,
365 winbindd_stdin_handler,
366 is_parent);
367 }
368 }
369
370 return true;
371 }
372
373 static void winbindd_sig_hup_handler(struct tevent_context *ev,
374 struct tevent_signal *se,
375 int signum,
376 int count,
377 void *siginfo,
378 void *private_data)
379 {
380 const char *file = (const char *)private_data;
381
382 DEBUG(1,("Reloading services after SIGHUP\n"));
383 flush_caches_noinit();
384 reload_services_file(file);
385 }
386
387 bool winbindd_setup_sig_hup_handler(const char *lfile)
388 {
389 struct tevent_signal *se;
390 char *file = NULL;
391
392 if (lfile) {
393 file = talloc_strdup(winbind_event_context(),
394 lfile);
395 if (!file) {
396 return false;
397 }
398 }
399
400 se = tevent_add_signal(winbind_event_context(),
401 winbind_event_context(),
402 SIGHUP, 0,
403 winbindd_sig_hup_handler,
404 file);
405 if (!se) {
406 return false;
407 }
408
409 return true;
410 }
411
412 static void winbindd_sig_chld_handler(struct tevent_context *ev,
413 struct tevent_signal *se,
414 int signum,
415 int count,
416 void *siginfo,
417 void *private_data)
418 {
419 pid_t pid;
420
421 while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
422 winbind_child_died(pid);
423 }
424 }
425
426 static bool winbindd_setup_sig_chld_handler(void)
427 {
428 struct tevent_signal *se;
429
430 se = tevent_add_signal(winbind_event_context(),
431 winbind_event_context(),
432 SIGCHLD, 0,
433 winbindd_sig_chld_handler,
434 NULL);
435 if (!se) {
436 return false;
437 }
438
439 return true;
440 }
441
442 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
443 struct tevent_signal *se,
444 int signum,
445 int count,
446 void *siginfo,
447 void *private_data)
448 {
449 winbindd_status();
450 }
451
452 static bool winbindd_setup_sig_usr2_handler(void)
453 {
454 struct tevent_signal *se;
455
456 se = tevent_add_signal(winbind_event_context(),
457 winbind_event_context(),
458 SIGUSR2, 0,
459 winbindd_sig_usr2_handler,
460 NULL);
461 if (!se) {
462 return false;
463 }
464
465 return true;
466 }
467
468 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
469 static void msg_reload_services(struct messaging_context *msg,
470 void *private_data,
471 uint32_t msg_type,
472 struct server_id server_id,
473 DATA_BLOB *data)
474 {
475 /* Flush various caches */
476 flush_caches();
477 reload_services_file((const char *) private_data);
478 }
479
480 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
481 static void msg_shutdown(struct messaging_context *msg,
482 void *private_data,
483 uint32_t msg_type,
484 struct server_id server_id,
485 DATA_BLOB *data)
486 {
487 /* only the parent waits for this message */
488 DEBUG(0,("Got shutdown message\n"));
489 terminate(true);
490 }
491
492
493 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
494 void *private_data,
495 uint32_t msg_type,
496 struct server_id server_id,
497 DATA_BLOB *data)
498 {
499 uint8 ret;
500 pid_t child_pid;
501 NTSTATUS status;
502
503 DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
504 "message.\n"));
505
506 /*
507 * call the validation code from a child:
508 * so we don't block the main winbindd and the validation
509 * code can safely use fork/waitpid...
510 */
511 child_pid = fork();
512
513 if (child_pid == -1) {
514 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
515 strerror(errno)));
516 return;
517 }
518
519 if (child_pid != 0) {
520 /* parent */
521 DEBUG(5, ("winbind_msg_validate_cache: child created with "
522 "pid %d.\n", (int)child_pid));
523 return;
524 }
525
526 /* child */
527
528 status = winbindd_reinit_after_fork(NULL, NULL);
529 if (!NT_STATUS_IS_OK(status)) {
530 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
531 nt_errstr(status)));
532 _exit(0);
533 }
534
535 /* install default SIGCHLD handler: validation code uses fork/waitpid */
536 CatchSignal(SIGCHLD, SIG_DFL);
537
538 ret = (uint8)winbindd_validate_cache_nobackup();
539 DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
540 messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
541 (size_t)1);
542 _exit(0);
543 }
544
545 static struct winbindd_dispatch_table {
546 enum winbindd_cmd cmd;
547 void (*fn)(struct winbindd_cli_state *state);
548 const char *winbindd_cmd_name;
549 } dispatch_table[] = {
550
551 /* Enumeration functions */
552
553 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
554 "LIST_TRUSTDOM" },
555
556 /* Miscellaneous */
557
558 { WINBINDD_INFO, winbindd_info, "INFO" },
559 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
560 "INTERFACE_VERSION" },
561 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
562 { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
563 { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
564 { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
565 { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
566 "WINBINDD_PRIV_PIPE_DIR" },
567
568 /* Credential cache access */
569 { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
570 { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
571
572 /* End of list */
573
574 { WINBINDD_NUM_CMDS, NULL, "NONE" }
575 };
576
577 struct winbindd_async_dispatch_table {
578 enum winbindd_cmd cmd;
579 const char *cmd_name;
580 struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
581 struct tevent_context *ev,
582 struct winbindd_cli_state *cli,
583 struct winbindd_request *request);
584 NTSTATUS (*recv_req)(struct tevent_req *req,
585 struct winbindd_response *presp);
586 };
587
588 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
589 { WINBINDD_PING, "PING",
590 wb_ping_send, wb_ping_recv },
591 { WINBINDD_LOOKUPSID, "LOOKUPSID",
592 winbindd_lookupsid_send, winbindd_lookupsid_recv },
593 { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
594 winbindd_lookupsids_send, winbindd_lookupsids_recv },
595 { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
596 winbindd_lookupname_send, winbindd_lookupname_recv },
597 { WINBINDD_SID_TO_UID, "SID_TO_UID",
598 winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
599 { WINBINDD_SID_TO_GID, "SID_TO_GID",
600 winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
601 { WINBINDD_UID_TO_SID, "UID_TO_SID",
602 winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
603 { WINBINDD_GID_TO_SID, "GID_TO_SID",
604 winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
605 { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
606 winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
607 { WINBINDD_GETPWSID, "GETPWSID",
608 winbindd_getpwsid_send, winbindd_getpwsid_recv },
609 { WINBINDD_GETPWNAM, "GETPWNAM",
610 winbindd_getpwnam_send, winbindd_getpwnam_recv },
611 { WINBINDD_GETPWUID, "GETPWUID",
612 winbindd_getpwuid_send, winbindd_getpwuid_recv },
613 { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
614 winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
615 { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
616 winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
617 { WINBINDD_GETGROUPS, "GETGROUPS",
618 winbindd_getgroups_send, winbindd_getgroups_recv },
619 { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
620 winbindd_show_sequence_send, winbindd_show_sequence_recv },
621 { WINBINDD_GETGRGID, "GETGRGID",
622 winbindd_getgrgid_send, winbindd_getgrgid_recv },
623 { WINBINDD_GETGRNAM, "GETGRNAM",
624 winbindd_getgrnam_send, winbindd_getgrnam_recv },
625 { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
626 winbindd_getusersids_send, winbindd_getusersids_recv },
627 { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
628 winbindd_lookuprids_send, winbindd_lookuprids_recv },
629 { WINBINDD_SETPWENT, "SETPWENT",
630 winbindd_setpwent_send, winbindd_setpwent_recv },
631 { WINBINDD_GETPWENT, "GETPWENT",
632 winbindd_getpwent_send, winbindd_getpwent_recv },
633 { WINBINDD_ENDPWENT, "ENDPWENT",
634 winbindd_endpwent_send, winbindd_endpwent_recv },
635 { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
636 winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
637 { WINBINDD_GETDCNAME, "GETDCNAME",
638 winbindd_getdcname_send, winbindd_getdcname_recv },
639 { WINBINDD_SETGRENT, "SETGRENT",
640 winbindd_setgrent_send, winbindd_setgrent_recv },
641 { WINBINDD_GETGRENT, "GETGRENT",
642 winbindd_getgrent_send, winbindd_getgrent_recv },
643 { WINBINDD_ENDGRENT, "ENDGRENT",
644 winbindd_endgrent_send, winbindd_endgrent_recv },
645 { WINBINDD_LIST_USERS, "LIST_USERS",
646 winbindd_list_users_send, winbindd_list_users_recv },
647 { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
648 winbindd_list_groups_send, winbindd_list_groups_recv },
649 { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
650 winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
651 { WINBINDD_PING_DC, "PING_DC",
652 winbindd_ping_dc_send, winbindd_ping_dc_recv },
653 { WINBINDD_PAM_AUTH, "PAM_AUTH",
654 winbindd_pam_auth_send, winbindd_pam_auth_recv },
655 { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
656 winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
657 { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
658 winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
659 { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
660 winbindd_pam_chng_pswd_auth_crap_send,
661 winbindd_pam_chng_pswd_auth_crap_recv },
662 { WINBINDD_WINS_BYIP, "WINS_BYIP",
663 winbindd_wins_byip_send, winbindd_wins_byip_recv },
664 { WINBINDD_WINS_BYNAME, "WINS_BYNAME",
665 winbindd_wins_byname_send, winbindd_wins_byname_recv },
666
667 { 0, NULL, NULL, NULL }
668 };
669
670 static struct winbindd_async_dispatch_table async_priv_table[] = {
671 { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
672 winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
673 { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
674 winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
675 { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
676 winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
677 { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
678 winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
679
680 { 0, NULL, NULL, NULL }
681 };
682
683 static void wb_request_done(struct tevent_req *req);
684
685 static void process_request(struct winbindd_cli_state *state)
686 {
687 struct winbindd_dispatch_table *table = dispatch_table;
688 struct winbindd_async_dispatch_table *atable;
689
690 state->mem_ctx = talloc_named(state, 0, "winbind request");
691 if (state->mem_ctx == NULL)
692 return;
693
694 /* Remember who asked us. */
695 state->pid = state->request->pid;
696
697 state->cmd_name = "unknown request";
698 state->recv_fn = NULL;
699 state->last_access = time(NULL);
700
701 /* Process command */
702
703 for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
704 if (state->request->cmd == atable->cmd) {
705 break;
706 }
707 }
708
709 if ((atable->send_req == NULL) && state->privileged) {
710 for (atable = async_priv_table; atable->send_req;
711 atable += 1) {
712 if (state->request->cmd == atable->cmd) {
713 break;
714 }
715 }
716 }
717
718 if (atable->send_req != NULL) {
719 struct tevent_req *req;
720
721 state->cmd_name = atable->cmd_name;
722 state->recv_fn = atable->recv_req;
723
724 DEBUG(10, ("process_request: Handling async request %d:%s\n",
725 (int)state->pid, state->cmd_name));
726
727 req = atable->send_req(state->mem_ctx, winbind_event_context(),
728 state, state->request);
729 if (req == NULL) {
730 DEBUG(0, ("process_request: atable->send failed for "
731 "%s\n", atable->cmd_name));
732 request_error(state);
733 return;
734 }
735 tevent_req_set_callback(req, wb_request_done, state);
736 return;
737 }
738
739 state->response = talloc_zero(state->mem_ctx,
740 struct winbindd_response);
741 if (state->response == NULL) {
742 DEBUG(10, ("talloc failed\n"));
743 remove_client(state);
744 return;
745 }
746 state->response->result = WINBINDD_PENDING;
747 state->response->length = sizeof(struct winbindd_response);
748
749 for (table = dispatch_table; table->fn; table++) {
750 if (state->request->cmd == table->cmd) {
751 DEBUG(10,("process_request: request fn %s\n",
752 table->winbindd_cmd_name ));
753 state->cmd_name = table->winbindd_cmd_name;
754 table->fn(state);
755 break;
756 }
757 }
758
759 if (!table->fn) {
760 DEBUG(10,("process_request: unknown request fn number %d\n",
761 (int)state->request->cmd ));
762 request_error(state);
763 }
764 }
765
766 static void wb_request_done(struct tevent_req *req)
767 {
768 struct winbindd_cli_state *state = tevent_req_callback_data(
769 req, struct winbindd_cli_state);
770 NTSTATUS status;
771
772 state->response = talloc_zero(state->mem_ctx,
773 struct winbindd_response);
774 if (state->response == NULL) {
775 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
776 (int)state->pid, state->cmd_name));
777 remove_client(state);
778 return;
779 }
780 state->response->result = WINBINDD_PENDING;
781 state->response->length = sizeof(struct winbindd_response);
782
783 status = state->recv_fn(req, state->response);
784 TALLOC_FREE(req);
785
786 DEBUG(10,("wb_request_done[%d:%s]: %s\n",
787 (int)state->pid, state->cmd_name, nt_errstr(status)));
788
789 if (!NT_STATUS_IS_OK(status)) {
790 request_error(state);
791 return;
792 }
793 request_ok(state);
794 }
795
796 /*
797 * This is the main event loop of winbind requests. It goes through a
798 * state-machine of 3 read/write requests, 4 if you have extra data to send.
799 *
800 * An idle winbind client has a read request of 4 bytes outstanding,
801 * finalizing function is request_len_recv, checking the length. request_recv
802 * then processes the packet. The processing function then at some point has
803 * to call request_finished which schedules sending the response.
804 */
805
806 static void request_finished(struct winbindd_cli_state *state);
807
808 static void winbind_client_request_read(struct tevent_req *req);
809 static void winbind_client_response_written(struct tevent_req *req);
810
811 static void request_finished(struct winbindd_cli_state *state)
812 {
813 struct tevent_req *req;
814
815 TALLOC_FREE(state->request);
816
817 req = wb_resp_write_send(state, winbind_event_context(),
818 state->out_queue, state->sock,
819 state->response);
820 if (req == NULL) {
821 DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
822 (int)state->pid, state->cmd_name));
823 remove_client(state);
824 return;
825 }
826 tevent_req_set_callback(req, winbind_client_response_written, state);
827 }
828
829 static void winbind_client_response_written(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_resp_write_recv(req, &err);
837 TALLOC_FREE(req);
838 if (ret == -1) {
839 close(state->sock);
840 state->sock = -1;
841 DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
842 (int)state->pid, state->cmd_name, strerror(err)));
843 remove_client(state);
844 return;
845 }
846
847 DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
848 "to client\n", (int)state->pid, state->cmd_name));
849
850 TALLOC_FREE(state->mem_ctx);
851 state->response = NULL;
852 state->cmd_name = "no request";
853 state->recv_fn = NULL;
854
855 req = wb_req_read_send(state, winbind_event_context(), state->sock,
856 WINBINDD_MAX_EXTRA_DATA);
857 if (req == NULL) {
858 remove_client(state);
859 return;
860 }
861 tevent_req_set_callback(req, winbind_client_request_read, state);
862 }
863
864 void request_error(struct winbindd_cli_state *state)
865 {
866 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
867 state->response->result = WINBINDD_ERROR;
868 request_finished(state);
869 }
870
871 void request_ok(struct winbindd_cli_state *state)
872 {
873 SMB_ASSERT(state->response->result == WINBINDD_PENDING);
874 state->response->result = WINBINDD_OK;
875 request_finished(state);
876 }
877
878 /* Process a new connection by adding it to the client connection list */
879
880 static void new_connection(int listen_sock, bool privileged)
881 {
882 struct sockaddr_un sunaddr;
883 struct winbindd_cli_state *state;
884 struct tevent_req *req;
885 socklen_t len;
886 int sock;
887
888 /* Accept connection */
889
890 len = sizeof(sunaddr);
891
892 sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
893
894 if (sock == -1) {
895 if (errno != EINTR) {
896 DEBUG(0, ("Failed to accept socket - %s\n",
897 strerror(errno)));
898 }
899 return;
900 }
901
902 DEBUG(6,("accepted socket %d\n", sock));
903
904 /* Create new connection structure */
905
906 if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
907 close(sock);
908 return;
909 }
910
911 state->sock = sock;
912
913 state->out_queue = tevent_queue_create(state, "winbind client reply");
914 if (state->out_queue == NULL) {
915 close(sock);
916 TALLOC_FREE(state);
917 return;
918 }
919
920 state->last_access = time(NULL);
921
922 state->privileged = privileged;
923
924 req = wb_req_read_send(state, winbind_event_context(), state->sock,
925 WINBINDD_MAX_EXTRA_DATA);
926 if (req == NULL) {
927 TALLOC_FREE(state);
928 close(sock);
929 return;
930 }
931 tevent_req_set_callback(req, winbind_client_request_read, state);
932
933 /* Add to connection list */
934
935 winbindd_add_client(state);
936 }
937
938 static void winbind_client_request_read(struct tevent_req *req)
939 {
940 struct winbindd_cli_state *state = tevent_req_callback_data(
941 req, struct winbindd_cli_state);
942 ssize_t ret;
943 int err;
944
945 ret = wb_req_read_recv(req, state, &state->request, &err);
946 TALLOC_FREE(req);
947 if (ret == -1) {
948 if (err == EPIPE) {
949 DEBUG(6, ("closing socket %d, client exited\n",
950 state->sock));
951 } else {
952 DEBUG(2, ("Could not read client request from fd %d: "
953 "%s\n", state->sock, strerror(err)));
954 }
955 close(state->sock);
956 state->sock = -1;
957 remove_client(state);
958 return;
959 }
960 process_request(state);
961 }
962
963 /* Remove a client connection from client connection list */
964
965 static void remove_client(struct winbindd_cli_state *state)
966 {
967 char c = 0;
968 int nwritten;
969
970 /* It's a dead client - hold a funeral */
971
972 if (state == NULL) {
973 return;
974 }
975
976 if (state->sock != -1) {
977 /* tell client, we are closing ... */
978 nwritten = write(state->sock, &c, sizeof(c));
979 if (nwritten == -1) {
980 DEBUG(2, ("final write to client failed: %s\n",
981 strerror(errno)));
982 }
983
984 /* Close socket */
985
986 close(state->sock);
987 state->sock = -1;
988 }
989
990 TALLOC_FREE(state->mem_ctx);
991
992 /* Remove from list and free */
993
994 winbindd_remove_client(state);
995 TALLOC_FREE(state);
996 }
997
998 /* Is a client idle? */
999
1000 static bool client_is_idle(struct winbindd_cli_state *state) {
1001 return (state->request == NULL &&
1002 state->response == NULL &&
1003 !state->pwent_state && !state->grent_state);
1004 }
1005
1006 /* Shutdown client connection which has been idle for the longest time */
1007
1008 static bool remove_idle_client(void)
1009 {
1010 struct winbindd_cli_state *state, *remove_state = NULL;
1011 time_t last_access = 0;
1012 int nidle = 0;
1013
1014 for (state = winbindd_client_list(); state; state = state->next) {
1015 if (client_is_idle(state)) {
1016 nidle++;
1017 if (!last_access || state->last_access < last_access) {
1018 last_access = state->last_access;
1019 remove_state = state;
1020 }
1021 }
1022 }
1023
1024 if (remove_state) {
1025 DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
1026 nidle, remove_state->sock, (unsigned int)remove_state->pid));
1027 remove_client(remove_state);
1028 return True;
1029 }
1030
1031 return False;
1032 }
1033
1034 struct winbindd_listen_state {
1035 bool privileged;
1036 int fd;
1037 };
1038
1039 static void winbindd_listen_fde_handler(struct tevent_context *ev,
1040 struct tevent_fd *fde,
1041 uint16_t flags,
1042 void *private_data)
1043 {
1044 struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
1045 struct winbindd_listen_state);
1046
1047 while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
1048 DEBUG(5,("winbindd: Exceeding %d client "
1049 "connections, removing idle "
1050 "connection.\n", lp_winbind_max_clients()));
1051 if (!remove_idle_client()) {
1052 DEBUG(0,("winbindd: Exceeding %d "
1053 "client connections, no idle "
1054 "connection found\n",
1055 lp_winbind_max_clients()));
1056 break;
1057 }
1058 }
1059 new_connection(s->fd, s->privileged);
1060 }
1061
1062 /*
1063 * Winbindd socket accessor functions
1064 */
1065
1066 char *get_winbind_priv_pipe_dir(void)
1067 {
1068 return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
1069 }
1070
1071 static bool winbindd_setup_listeners(void)
1072 {
1073 struct winbindd_listen_state *pub_state = NULL;
1074 struct winbindd_listen_state *priv_state = NULL;
1075 struct tevent_fd *fde;
1076 int rc;
1077
1078 pub_state = talloc(winbind_event_context(),
1079 struct winbindd_listen_state);
1080 if (!pub_state) {
1081 goto failed;
1082 }
1083
1084 pub_state->privileged = false;
1085 pub_state->fd = create_pipe_sock(
1086 lp_winbindd_socket_directory(), WINBINDD_SOCKET_NAME, 0755);
1087 if (pub_state->fd == -1) {
1088 goto failed;
1089 }
1090 rc = listen(pub_state->fd, 5);
1091 if (rc < 0) {
1092 goto failed;
1093 }
1094
1095 fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
1096 TEVENT_FD_READ, winbindd_listen_fde_handler,
1097 pub_state);
1098 if (fde == NULL) {
1099 close(pub_state->fd);
1100 goto failed;
1101 }
1102 tevent_fd_set_auto_close(fde);
1103
1104 priv_state = talloc(winbind_event_context(),
1105 struct winbindd_listen_state);
1106 if (!priv_state) {
1107 goto failed;
1108 }
1109
1110 priv_state->privileged = true;
1111 priv_state->fd = create_pipe_sock(
1112 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1113 if (priv_state->fd == -1) {
1114 goto failed;
1115 }
1116 rc = listen(priv_state->fd, 5);
1117 if (rc < 0) {
1118 goto failed;
1119 }
1120
1121 fde = tevent_add_fd(winbind_event_context(), priv_state,
1122 priv_state->fd, TEVENT_FD_READ,
1123 winbindd_listen_fde_handler, priv_state);
1124 if (fde == NULL) {
1125 close(priv_state->fd);
1126 goto failed;
1127 }
1128 tevent_fd_set_auto_close(fde);
1129
1130 return true;
1131 failed:
1132 TALLOC_FREE(pub_state);
1133 TALLOC_FREE(priv_state);
1134 return false;
1135 }
1136
1137 bool winbindd_use_idmap_cache(void)
1138 {
1139 return !opt_nocache;
1140 }
1141
1142 bool winbindd_use_cache(void)
1143 {
1144 return !opt_nocache;
1145 }
1146
1147 static void winbindd_register_handlers(struct messaging_context *msg_ctx,
1148 bool foreground)
1149 {
1150 NTSTATUS status;
1151 /* Setup signal handlers */
1152
1153 if (!winbindd_setup_sig_term_handler(true))
1154 exit(1);
1155 if (!winbindd_setup_stdin_handler(true, foreground))
1156 exit(1);
1157 if (!winbindd_setup_sig_hup_handler(NULL))
1158 exit(1);
1159 if (!winbindd_setup_sig_chld_handler())
1160 exit(1);
1161 if (!winbindd_setup_sig_usr2_handler())
1162 exit(1);
1163
1164 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
1165
1166 /*
1167 * Ensure all cache and idmap caches are consistent
1168 * and initialized before we startup.
1169 */
1170 if (!winbindd_cache_validate_and_initialize()) {
1171 exit(1);
1172 }
1173
1174 /* get broadcast messages */
1175
1176 if (!serverid_register(messaging_server_id(msg_ctx),
1177 FLAG_MSG_GENERAL |
1178 FLAG_MSG_WINBIND |
1179 FLAG_MSG_DBWRAP)) {
1180 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1181 exit(1);
1182 }
1183
1184 /* React on 'smbcontrol winbindd reload-config' in the same way
1185 as to SIGHUP signal */
1186 messaging_register(msg_ctx, NULL,
1187 MSG_SMB_CONF_UPDATED, msg_reload_services);
1188 messaging_register(msg_ctx, NULL,
1189 MSG_SHUTDOWN, msg_shutdown);
1190
1191 /* Handle online/offline messages. */
1192 messaging_register(msg_ctx, NULL,
1193 MSG_WINBIND_OFFLINE, winbind_msg_offline);
1194 messaging_register(msg_ctx, NULL,
1195 MSG_WINBIND_ONLINE, winbind_msg_online);
1196 messaging_register(msg_ctx, NULL,
1197 MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1198
1199 /* Handle domain online/offline messages for domains */
1200 messaging_register(winbind_messaging_context(), NULL,
1201 MSG_WINBIND_DOMAIN_OFFLINE, winbind_msg_domain_offline);
1202 messaging_register(winbind_messaging_context(), NULL,
1203 MSG_WINBIND_DOMAIN_ONLINE, winbind_msg_domain_online);
1204
1205 messaging_register(msg_ctx, NULL,
1206 MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1207
1208 messaging_register(msg_ctx, NULL,
1209 MSG_WINBIND_VALIDATE_CACHE,
1210 winbind_msg_validate_cache);
1211
1212 messaging_register(msg_ctx, NULL,
1213 MSG_WINBIND_DUMP_DOMAIN_LIST,
1214 winbind_msg_dump_domain_list);
1215
1216 messaging_register(msg_ctx, NULL,
1217 MSG_WINBIND_IP_DROPPED,
1218 winbind_msg_ip_dropped_parent);
1219
1220 /* Register handler for MSG_DEBUG. */
1221 messaging_register(msg_ctx, NULL,
1222 MSG_DEBUG,
1223 winbind_msg_debug);
1224
1225 netsamlogon_cache_init(); /* Non-critical */
1226
1227 /* clear the cached list of trusted domains */
1228
1229 wcache_tdc_clear();
1230
1231 if (!init_domain_list()) {
1232 DEBUG(0,("unable to initialize domain list\n"));
1233 exit(1);
1234 }
1235
1236 init_idmap_child();
1237 init_locator_child();
1238
1239 smb_nscd_flush_user_cache();
1240 smb_nscd_flush_group_cache();
1241
1242 if (lp_allow_trusted_domains()) {
1243 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1244 rescan_trusted_domains, NULL) == NULL) {
1245 DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1246 exit(1);
1247 }
1248 }
1249
1250 status = wb_irpc_register();
1251
1252 if (!NT_STATUS_IS_OK(status)) {
1253 DEBUG(0, ("Could not register IRPC handlers\n"));
1254 exit(1);
1255 }
1256 }
1257
1258 struct winbindd_addrchanged_state {
1259 struct addrchange_context *ctx;
1260 struct tevent_context *ev;
1261 struct messaging_context *msg_ctx;
1262 };
1263
1264 static void winbindd_addr_changed(struct tevent_req *req);
1265
1266 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1267 struct tevent_context *ev,
1268 struct messaging_context *msg_ctx)
1269 {
1270 struct winbindd_addrchanged_state *state;
1271 struct tevent_req *req;
1272 NTSTATUS status;
1273
1274 state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1275 if (state == NULL) {
1276 DEBUG(10, ("talloc failed\n"));
1277 return;
1278 }
1279 state->ev = ev;
1280 state->msg_ctx = msg_ctx;
1281
1282 status = addrchange_context_create(state, &state->ctx);
1283 if (!NT_STATUS_IS_OK(status)) {
1284 DEBUG(10, ("addrchange_context_create failed: %s\n",
1285 nt_errstr(status)));
1286 TALLOC_FREE(state);
1287 return;
1288 }
1289 req = addrchange_send(state, ev, state->ctx);
1290 if (req == NULL) {
1291 DEBUG(0, ("addrchange_send failed\n"));
1292 TALLOC_FREE(state);
1293 return;
1294 }
1295 tevent_req_set_callback(req, winbindd_addr_changed, state);
1296 }
1297
1298 static void winbindd_addr_changed(struct tevent_req *req)
1299 {
1300 struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1301 req, struct winbindd_addrchanged_state);
1302 enum addrchange_type type;
1303 struct sockaddr_storage addr;
1304 NTSTATUS status;
1305
1306 status = addrchange_recv(req, &type, &addr);
1307 TALLOC_FREE(req);
1308 if (!NT_STATUS_IS_OK(status)) {
1309 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1310 nt_errstr(status)));
1311 TALLOC_FREE(state);
1312 return;
1313 }
1314 if (type == ADDRCHANGE_DEL) {
1315 char addrstr[INET6_ADDRSTRLEN];
1316 DATA_BLOB blob;
1317
1318 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1319
1320 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1321 addrstr));
1322
1323 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1324
1325 status = messaging_send(state->msg_ctx,
1326 messaging_server_id(state->msg_ctx),
1327 MSG_WINBIND_IP_DROPPED, &blob);
1328 if (!NT_STATUS_IS_OK(status)) {
1329 DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1330 nt_errstr(status)));
1331 }
1332 }
1333 req = addrchange_send(state, state->ev, state->ctx);
1334 if (req == NULL) {
1335 DEBUG(0, ("addrchange_send failed\n"));
1336 TALLOC_FREE(state);
1337 return;
1338 }
1339 tevent_req_set_callback(req, winbindd_addr_changed, state);
1340 }
1341
1342 /* Main function */
1343
1344 int main(int argc, const char **argv)
1345 {
1346 static bool is_daemon = False;
1347 static bool Fork = True;
1348 static bool log_stdout = False;
1349 static bool no_process_group = False;
1350 enum {
1351 OPT_DAEMON = 1000,
1352 OPT_FORK,
1353 OPT_NO_PROCESS_GROUP,
1354 OPT_LOG_STDOUT
1355 };
1356 struct poptOption long_options[] = {
1357 POPT_AUTOHELP
1358 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1359 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1360 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1361 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1362 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1363 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1364 POPT_COMMON_SAMBA
1365 POPT_TABLEEND
1366 };
1367 poptContext pc;
1368 int opt;
1369 TALLOC_CTX *frame;
1370 NTSTATUS status;
1371 bool ok;
1372
1373 /*
1374 * Do this before any other talloc operation
1375 */
1376 talloc_enable_null_tracking();
1377 frame = talloc_stackframe();
1378
1379 /*
1380 * We want total control over the permissions on created files,
1381 * so set our umask to 0.
1382 */
1383 umask(0);
1384
1385 setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
1386
1387 /* glibc (?) likes to print "User defined signal 1" and exit if a
1388 SIGUSR[12] is received before a handler is installed */
1389
1390 CatchSignal(SIGUSR1, SIG_IGN);
1391 CatchSignal(SIGUSR2, SIG_IGN);
1392
1393 fault_setup();
1394 dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1395
1396 load_case_tables();
1397
1398 /* Initialise for running in non-root mode */
1399
1400 sec_init();
1401
1402 set_remote_machine_name("winbindd", False);
1403
1404 /* Set environment variable so we don't recursively call ourselves.
1405 This may also be useful interactively. */
1406
1407 if ( !winbind_off() ) {
1408 DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
1409 exit(1);
1410 }
1411
1412 /* Initialise samba/rpc client stuff */
1413
1414 pc = poptGetContext("winbindd", argc, argv, long_options, 0);
1415
1416 while ((opt = poptGetNextOpt(pc)) != -1) {
1417 switch (opt) {
1418 /* Don't become a daemon */
1419 case OPT_DAEMON:
1420 is_daemon = True;
1421 break;
1422 case 'i':
1423 interactive = True;
1424 log_stdout = True;
1425 Fork = False;
1426 break;
1427 case OPT_FORK:
1428 Fork = false;
1429 break;
1430 case OPT_NO_PROCESS_GROUP:
1431 no_process_group = true;
1432 break;
1433 case OPT_LOG_STDOUT:
1434 log_stdout = true;
1435 break;
1436 case 'n':
1437 opt_nocache = true;
1438 break;
1439 default:
1440 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1441 poptBadOption(pc, 0), poptStrerror(opt));
1442 poptPrintUsage(pc, stderr, 0);
1443 exit(1);
1444 }
1445 }
1446
1447 /* We call dump_core_setup one more time because the command line can
1448 * set the log file or the log-basename and this will influence where
1449 * cores are stored. Without this call get_dyn_LOGFILEBASE will be
1450 * the default value derived from build's prefix. For EOM this value
1451 * is often not related to the path where winbindd is actually run
1452 * in production.
1453 */
1454 dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1455 if (is_daemon && interactive) {
1456 d_fprintf(stderr,"\nERROR: "
1457 "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1458 poptPrintUsage(pc, stderr, 0);
1459 exit(1);
1460 }
1461
1462 if (log_stdout && Fork) {
1463 d_fprintf(stderr, "\nERROR: "
1464 "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1465 poptPrintUsage(pc, stderr, 0);
1466 exit(1);
1467 }
1468
1469 poptFreeContext(pc);
1470
1471 if (!override_logfile) {
1472 char *lfile = NULL;
1473 if (asprintf(&lfile,"%s/log.winbindd",
1474 get_dyn_LOGFILEBASE()) > 0) {
1475 lp_set_logfile(lfile);
1476 SAFE_FREE(lfile);
1477 }
1478 }
1479
1480 if (log_stdout) {
1481 setup_logging("winbindd", DEBUG_STDOUT);
1482 } else {
1483 setup_logging("winbindd", DEBUG_FILE);
1484 }
1485 reopen_logs();
1486
1487 DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1488 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1489
1490 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1491 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1492 exit(1);
1493 }
1494 /* After parsing the configuration file we setup the core path one more time
1495 * as the log file might have been set in the configuration and cores's
1496 * path is by default basename(lp_logfile()).
1497 */
1498 dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1499
1500 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1501 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1502 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running the winbindd binary. \n"));
1503 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting the internal AD DC winbindd implementation, which is not the same as this one\n"));
1504 exit(1);
1505 }
1506
1507 if (!cluster_probe_ok()) {
1508 exit(1);
1509 }
1510
1511 /* Initialise messaging system */
1512
1513 if (winbind_messaging_context() == NULL) {
1514 exit(1);
1515 }
1516
1517 if (!reload_services_file(NULL)) {
1518 DEBUG(0, ("error opening config file\n"));
1519 exit(1);
1520 }
1521
1522 ok = directory_create_or_exist(lp_lock_directory(), geteuid(), 0755);
1523 if (!ok) {
1524 DEBUG(0, ("Failed to create directory %s for lock files - %s\n",
1525 lp_lock_directory(), strerror(errno)));
1526 exit(1);
1527 }
1528
1529 ok = directory_create_or_exist(lp_pid_directory(), geteuid(), 0755);
1530 if (!ok) {
1531 DEBUG(0, ("Failed to create directory %s for pid files - %s\n",
1532 lp_pid_directory(), strerror(errno)));
1533 exit(1);
1534 }
1535
1536 /* Setup names. */
1537
1538 if (!init_names())
1539 exit(1);
1540
1541 load_interfaces();
1542
1543 if (!secrets_init()) {
1544
1545 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1546 return False;
1547 }
1548
1549 status = rpccli_pre_open_netlogon_creds();
1550 if (!NT_STATUS_IS_OK(status)) {
1551 DEBUG(0, ("rpccli_pre_open_netlogon_creds() - %s\n",
1552 nt_errstr(status)));
1553 exit(1);
1554 }
1555
1556 /* Unblock all signals we are interested in as they may have been
1557 blocked by the parent process. */
1558
1559 BlockSignals(False, SIGINT);
1560 BlockSignals(False, SIGQUIT);
1561 BlockSignals(False, SIGTERM);
1562 BlockSignals(False, SIGUSR1);
1563 BlockSignals(False, SIGUSR2);
1564 BlockSignals(False, SIGHUP);
1565 BlockSignals(False, SIGCHLD);
1566
1567 if (!interactive)
1568 become_daemon(Fork, no_process_group, log_stdout);
1569
1570 pidfile_create(lp_pid_directory(), "winbindd");
1571
1572 #if HAVE_SETPGID
1573 /*
1574 * If we're interactive we want to set our own process group for
1575 * signal management.
1576 */
1577 if (interactive && !no_process_group)
1578 setpgid( (pid_t)0, (pid_t)0);
1579 #endif
1580
1581 TimeInit();
1582
1583 /* Don't use winbindd_reinit_after_fork here as
1584 * we're just starting up and haven't created any
1585 * winbindd-specific resources we must free yet. JRA.
1586 */
1587
1588 status = reinit_after_fork(winbind_messaging_context(),
1589 winbind_event_context(),
1590 false);
1591 if (!NT_STATUS_IS_OK(status)) {
1592 exit_daemon("Winbindd reinit_after_fork() failed", map_errno_from_nt_status(status));
1593 }
1594
1595 /*
1596 * Do not initialize the parent-child-pipe before becoming
1597 * a daemon: this is used to detect a died parent in the child
1598 * process.
1599 */
1600 status = init_before_fork();
1601 if (!NT_STATUS_IS_OK(status)) {
1602 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1603 }
1604
1605 winbindd_register_handlers(winbind_messaging_context(), !Fork);
1606
1607 if (!messaging_parent_dgm_cleanup_init(winbind_messaging_context())) {
1608 exit(1);
1609 }
1610
1611 status = init_system_session_info();
1612 if (!NT_STATUS_IS_OK(status)) {
1613 exit_daemon("Winbindd failed to setup system user info", map_errno_from_nt_status(status));
1614 }
1615
1616 rpc_lsarpc_init(NULL);
1617 rpc_samr_init(NULL);
1618
1619 winbindd_init_addrchange(NULL, winbind_event_context(),
1620 winbind_messaging_context());
1621
1622 /* setup listen sockets */
1623
1624 if (!winbindd_setup_listeners()) {
1625 exit_daemon("Winbindd failed to setup listeners", EPIPE);
1626 }
1627
1628 irpc_add_name(winbind_imessaging_context(), "winbind_server");
1629
1630 TALLOC_FREE(frame);
1631
1632 if (!interactive) {
1633 daemon_ready("winbindd");
1634 }
1635
1636 /* Loop waiting for requests */
1637 while (1) {
1638 frame = talloc_stackframe();
1639
1640 if (tevent_loop_once(winbind_event_context()) == -1) {
1641 DEBUG(1, ("tevent_loop_once() failed: %s\n",
1642 strerror(errno)));
1643 return 1;
1644 }
1645
1646 TALLOC_FREE(frame);
1647 }
1648
1649 return 0;
1650 }
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