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s3: libsmbclient: Add missing talloc stackframe.
[Samba.git] / source3 / winbindd / winbindd.c
blobcaa9ed127dd7aa1e8d23fad28f983bec68638a58
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 /*
1035 * Terminate all clients whose requests have taken longer than
1036 * "winbind request timeout" seconds to process, or have been
1037 * idle for more than "winbind request timeout" seconds.
1038 */
1039
1040 static void remove_timed_out_clients(void)
1041 {
1042 struct winbindd_cli_state *state, *next = NULL;
1043 time_t curr_time = time(NULL);
1044 int timeout_val = lp_winbind_request_timeout();
1045
1046 for (state = winbindd_client_list(); state; state = next) {
1047 time_t expiry_time;
1048
1049 next = state->next;
1050 expiry_time = state->last_access + timeout_val;
1051
1052 if (curr_time > expiry_time) {
1053 if (client_is_idle(state)) {
1054 DEBUG(5,("Idle client timed out, "
1055 "shutting down sock %d, pid %u\n",
1056 state->sock,
1057 (unsigned int)state->pid));
1058 } else {
1059 DEBUG(5,("Client request timed out, "
1060 "shutting down sock %d, pid %u\n",
1061 state->sock,
1062 (unsigned int)state->pid));
1063 }
1064 remove_client(state);
1065 }
1066 }
1067 }
1068
1069 struct winbindd_listen_state {
1070 bool privileged;
1071 int fd;
1072 };
1073
1074 static void winbindd_listen_fde_handler(struct tevent_context *ev,
1075 struct tevent_fd *fde,
1076 uint16_t flags,
1077 void *private_data)
1078 {
1079 struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
1080 struct winbindd_listen_state);
1081
1082 while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
1083 DEBUG(5,("winbindd: Exceeding %d client "
1084 "connections, removing idle "
1085 "connection.\n", lp_winbind_max_clients()));
1086 if (!remove_idle_client()) {
1087 DEBUG(0,("winbindd: Exceeding %d "
1088 "client connections, no idle "
1089 "connection found\n",
1090 lp_winbind_max_clients()));
1091 break;
1092 }
1093 }
1094 remove_timed_out_clients();
1095 new_connection(s->fd, s->privileged);
1096 }
1097
1098 /*
1099 * Winbindd socket accessor functions
1100 */
1101
1102 char *get_winbind_priv_pipe_dir(void)
1103 {
1104 return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
1105 }
1106
1107 static bool winbindd_setup_listeners(void)
1108 {
1109 struct winbindd_listen_state *pub_state = NULL;
1110 struct winbindd_listen_state *priv_state = NULL;
1111 struct tevent_fd *fde;
1112 int rc;
1113
1114 pub_state = talloc(winbind_event_context(),
1115 struct winbindd_listen_state);
1116 if (!pub_state) {
1117 goto failed;
1118 }
1119
1120 pub_state->privileged = false;
1121 pub_state->fd = create_pipe_sock(
1122 lp_winbindd_socket_directory(), WINBINDD_SOCKET_NAME, 0755);
1123 if (pub_state->fd == -1) {
1124 goto failed;
1125 }
1126 rc = listen(pub_state->fd, 5);
1127 if (rc < 0) {
1128 goto failed;
1129 }
1130
1131 fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
1132 TEVENT_FD_READ, winbindd_listen_fde_handler,
1133 pub_state);
1134 if (fde == NULL) {
1135 close(pub_state->fd);
1136 goto failed;
1137 }
1138 tevent_fd_set_auto_close(fde);
1139
1140 priv_state = talloc(winbind_event_context(),
1141 struct winbindd_listen_state);
1142 if (!priv_state) {
1143 goto failed;
1144 }
1145
1146 priv_state->privileged = true;
1147 priv_state->fd = create_pipe_sock(
1148 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
1149 if (priv_state->fd == -1) {
1150 goto failed;
1151 }
1152 rc = listen(priv_state->fd, 5);
1153 if (rc < 0) {
1154 goto failed;
1155 }
1156
1157 fde = tevent_add_fd(winbind_event_context(), priv_state,
1158 priv_state->fd, TEVENT_FD_READ,
1159 winbindd_listen_fde_handler, priv_state);
1160 if (fde == NULL) {
1161 close(priv_state->fd);
1162 goto failed;
1163 }
1164 tevent_fd_set_auto_close(fde);
1165
1166 return true;
1167 failed:
1168 TALLOC_FREE(pub_state);
1169 TALLOC_FREE(priv_state);
1170 return false;
1171 }
1172
1173 bool winbindd_use_idmap_cache(void)
1174 {
1175 return !opt_nocache;
1176 }
1177
1178 bool winbindd_use_cache(void)
1179 {
1180 return !opt_nocache;
1181 }
1182
1183 static void winbindd_register_handlers(struct messaging_context *msg_ctx,
1184 bool foreground)
1185 {
1186 NTSTATUS status;
1187 /* Setup signal handlers */
1188
1189 if (!winbindd_setup_sig_term_handler(true))
1190 exit(1);
1191 if (!winbindd_setup_stdin_handler(true, foreground))
1192 exit(1);
1193 if (!winbindd_setup_sig_hup_handler(NULL))
1194 exit(1);
1195 if (!winbindd_setup_sig_chld_handler())
1196 exit(1);
1197 if (!winbindd_setup_sig_usr2_handler())
1198 exit(1);
1199
1200 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
1201
1202 /*
1203 * Ensure all cache and idmap caches are consistent
1204 * and initialized before we startup.
1205 */
1206 if (!winbindd_cache_validate_and_initialize()) {
1207 exit(1);
1208 }
1209
1210 /* get broadcast messages */
1211
1212 if (!serverid_register(messaging_server_id(msg_ctx),
1213 FLAG_MSG_GENERAL |
1214 FLAG_MSG_WINBIND |
1215 FLAG_MSG_DBWRAP)) {
1216 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
1217 exit(1);
1218 }
1219
1220 /* React on 'smbcontrol winbindd reload-config' in the same way
1221 as to SIGHUP signal */
1222 messaging_register(msg_ctx, NULL,
1223 MSG_SMB_CONF_UPDATED, msg_reload_services);
1224 messaging_register(msg_ctx, NULL,
1225 MSG_SHUTDOWN, msg_shutdown);
1226
1227 /* Handle online/offline messages. */
1228 messaging_register(msg_ctx, NULL,
1229 MSG_WINBIND_OFFLINE, winbind_msg_offline);
1230 messaging_register(msg_ctx, NULL,
1231 MSG_WINBIND_ONLINE, winbind_msg_online);
1232 messaging_register(msg_ctx, NULL,
1233 MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
1234
1235 /* Handle domain online/offline messages for domains */
1236 messaging_register(winbind_messaging_context(), NULL,
1237 MSG_WINBIND_DOMAIN_OFFLINE, winbind_msg_domain_offline);
1238 messaging_register(winbind_messaging_context(), NULL,
1239 MSG_WINBIND_DOMAIN_ONLINE, winbind_msg_domain_online);
1240
1241 messaging_register(msg_ctx, NULL,
1242 MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
1243
1244 messaging_register(msg_ctx, NULL,
1245 MSG_WINBIND_VALIDATE_CACHE,
1246 winbind_msg_validate_cache);
1247
1248 messaging_register(msg_ctx, NULL,
1249 MSG_WINBIND_DUMP_DOMAIN_LIST,
1250 winbind_msg_dump_domain_list);
1251
1252 messaging_register(msg_ctx, NULL,
1253 MSG_WINBIND_IP_DROPPED,
1254 winbind_msg_ip_dropped_parent);
1255
1256 /* Register handler for MSG_DEBUG. */
1257 messaging_register(msg_ctx, NULL,
1258 MSG_DEBUG,
1259 winbind_msg_debug);
1260
1261 netsamlogon_cache_init(); /* Non-critical */
1262
1263 /* clear the cached list of trusted domains */
1264
1265 wcache_tdc_clear();
1266
1267 if (!init_domain_list()) {
1268 DEBUG(0,("unable to initialize domain list\n"));
1269 exit(1);
1270 }
1271
1272 init_idmap_child();
1273 init_locator_child();
1274
1275 smb_nscd_flush_user_cache();
1276 smb_nscd_flush_group_cache();
1277
1278 if (lp_allow_trusted_domains()) {
1279 if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
1280 rescan_trusted_domains, NULL) == NULL) {
1281 DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
1282 exit(1);
1283 }
1284 }
1285
1286 status = wb_irpc_register();
1287
1288 if (!NT_STATUS_IS_OK(status)) {
1289 DEBUG(0, ("Could not register IRPC handlers\n"));
1290 exit(1);
1291 }
1292 }
1293
1294 struct winbindd_addrchanged_state {
1295 struct addrchange_context *ctx;
1296 struct tevent_context *ev;
1297 struct messaging_context *msg_ctx;
1298 };
1299
1300 static void winbindd_addr_changed(struct tevent_req *req);
1301
1302 static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
1303 struct tevent_context *ev,
1304 struct messaging_context *msg_ctx)
1305 {
1306 struct winbindd_addrchanged_state *state;
1307 struct tevent_req *req;
1308 NTSTATUS status;
1309
1310 state = talloc(mem_ctx, struct winbindd_addrchanged_state);
1311 if (state == NULL) {
1312 DEBUG(10, ("talloc failed\n"));
1313 return;
1314 }
1315 state->ev = ev;
1316 state->msg_ctx = msg_ctx;
1317
1318 status = addrchange_context_create(state, &state->ctx);
1319 if (!NT_STATUS_IS_OK(status)) {
1320 DEBUG(10, ("addrchange_context_create failed: %s\n",
1321 nt_errstr(status)));
1322 TALLOC_FREE(state);
1323 return;
1324 }
1325 req = addrchange_send(state, ev, state->ctx);
1326 if (req == NULL) {
1327 DEBUG(0, ("addrchange_send failed\n"));
1328 TALLOC_FREE(state);
1329 return;
1330 }
1331 tevent_req_set_callback(req, winbindd_addr_changed, state);
1332 }
1333
1334 static void winbindd_addr_changed(struct tevent_req *req)
1335 {
1336 struct winbindd_addrchanged_state *state = tevent_req_callback_data(
1337 req, struct winbindd_addrchanged_state);
1338 enum addrchange_type type;
1339 struct sockaddr_storage addr;
1340 NTSTATUS status;
1341
1342 status = addrchange_recv(req, &type, &addr);
1343 TALLOC_FREE(req);
1344 if (!NT_STATUS_IS_OK(status)) {
1345 DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
1346 nt_errstr(status)));
1347 TALLOC_FREE(state);
1348 return;
1349 }
1350 if (type == ADDRCHANGE_DEL) {
1351 char addrstr[INET6_ADDRSTRLEN];
1352 DATA_BLOB blob;
1353
1354 print_sockaddr(addrstr, sizeof(addrstr), &addr);
1355
1356 DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
1357 addrstr));
1358
1359 blob = data_blob_const(addrstr, strlen(addrstr)+1);
1360
1361 status = messaging_send(state->msg_ctx,
1362 messaging_server_id(state->msg_ctx),
1363 MSG_WINBIND_IP_DROPPED, &blob);
1364 if (!NT_STATUS_IS_OK(status)) {
1365 DEBUG(10, ("messaging_send failed: %s - ignoring\n",
1366 nt_errstr(status)));
1367 }
1368 }
1369 req = addrchange_send(state, state->ev, state->ctx);
1370 if (req == NULL) {
1371 DEBUG(0, ("addrchange_send failed\n"));
1372 TALLOC_FREE(state);
1373 return;
1374 }
1375 tevent_req_set_callback(req, winbindd_addr_changed, state);
1376 }
1377
1378 /* Main function */
1379
1380 int main(int argc, const char **argv)
1381 {
1382 static bool is_daemon = False;
1383 static bool Fork = True;
1384 static bool log_stdout = False;
1385 static bool no_process_group = False;
1386 enum {
1387 OPT_DAEMON = 1000,
1388 OPT_FORK,
1389 OPT_NO_PROCESS_GROUP,
1390 OPT_LOG_STDOUT
1391 };
1392 struct poptOption long_options[] = {
1393 POPT_AUTOHELP
1394 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1395 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
1396 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1397 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1398 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
1399 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
1400 POPT_COMMON_SAMBA
1401 POPT_TABLEEND
1402 };
1403 poptContext pc;
1404 int opt;
1405 TALLOC_CTX *frame;
1406 NTSTATUS status;
1407 bool ok;
1408
1409 /*
1410 * Do this before any other talloc operation
1411 */
1412 talloc_enable_null_tracking();
1413 frame = talloc_stackframe();
1414
1415 /*
1416 * We want total control over the permissions on created files,
1417 * so set our umask to 0.
1418 */
1419 umask(0);
1420
1421 setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
1422
1423 /* glibc (?) likes to print "User defined signal 1" and exit if a
1424 SIGUSR[12] is received before a handler is installed */
1425
1426 CatchSignal(SIGUSR1, SIG_IGN);
1427 CatchSignal(SIGUSR2, SIG_IGN);
1428
1429 fault_setup();
1430 dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1431
1432 load_case_tables();
1433
1434 /* Initialise for running in non-root mode */
1435
1436 sec_init();
1437
1438 set_remote_machine_name("winbindd", False);
1439
1440 /* Set environment variable so we don't recursively call ourselves.
1441 This may also be useful interactively. */
1442
1443 if ( !winbind_off() ) {
1444 DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
1445 exit(1);
1446 }
1447
1448 /* Initialise samba/rpc client stuff */
1449
1450 pc = poptGetContext("winbindd", argc, argv, long_options, 0);
1451
1452 while ((opt = poptGetNextOpt(pc)) != -1) {
1453 switch (opt) {
1454 /* Don't become a daemon */
1455 case OPT_DAEMON:
1456 is_daemon = True;
1457 break;
1458 case 'i':
1459 interactive = True;
1460 log_stdout = True;
1461 Fork = False;
1462 break;
1463 case OPT_FORK:
1464 Fork = false;
1465 break;
1466 case OPT_NO_PROCESS_GROUP:
1467 no_process_group = true;
1468 break;
1469 case OPT_LOG_STDOUT:
1470 log_stdout = true;
1471 break;
1472 case 'n':
1473 opt_nocache = true;
1474 break;
1475 default:
1476 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1477 poptBadOption(pc, 0), poptStrerror(opt));
1478 poptPrintUsage(pc, stderr, 0);
1479 exit(1);
1480 }
1481 }
1482
1483 /* We call dump_core_setup one more time because the command line can
1484 * set the log file or the log-basename and this will influence where
1485 * cores are stored. Without this call get_dyn_LOGFILEBASE will be
1486 * the default value derived from build's prefix. For EOM this value
1487 * is often not related to the path where winbindd is actually run
1488 * in production.
1489 */
1490 dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1491 if (is_daemon && interactive) {
1492 d_fprintf(stderr,"\nERROR: "
1493 "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
1494 poptPrintUsage(pc, stderr, 0);
1495 exit(1);
1496 }
1497
1498 if (log_stdout && Fork) {
1499 d_fprintf(stderr, "\nERROR: "
1500 "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
1501 poptPrintUsage(pc, stderr, 0);
1502 exit(1);
1503 }
1504
1505 poptFreeContext(pc);
1506
1507 if (!override_logfile) {
1508 char *lfile = NULL;
1509 if (asprintf(&lfile,"%s/log.winbindd",
1510 get_dyn_LOGFILEBASE()) > 0) {
1511 lp_set_logfile(lfile);
1512 SAFE_FREE(lfile);
1513 }
1514 }
1515
1516 if (log_stdout) {
1517 setup_logging("winbindd", DEBUG_STDOUT);
1518 } else {
1519 setup_logging("winbindd", DEBUG_FILE);
1520 }
1521 reopen_logs();
1522
1523 DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
1524 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1525
1526 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1527 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1528 exit(1);
1529 }
1530 /* After parsing the configuration file we setup the core path one more time
1531 * as the log file might have been set in the configuration and cores's
1532 * path is by default basename(lp_logfile()).
1533 */
1534 dump_core_setup("winbindd", lp_logfile(talloc_tos()));
1535
1536 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1537 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1538 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running the winbindd binary. \n"));
1539 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"));
1540 exit(1);
1541 }
1542
1543 if (!cluster_probe_ok()) {
1544 exit(1);
1545 }
1546
1547 /* Initialise messaging system */
1548
1549 if (winbind_messaging_context() == NULL) {
1550 exit(1);
1551 }
1552
1553 if (!reload_services_file(NULL)) {
1554 DEBUG(0, ("error opening config file\n"));
1555 exit(1);
1556 }
1557
1558 ok = directory_create_or_exist(lp_lock_directory(), 0755);
1559 if (!ok) {
1560 DEBUG(0, ("Failed to create directory %s for lock files - %s\n",
1561 lp_lock_directory(), strerror(errno)));
1562 exit(1);
1563 }
1564
1565 ok = directory_create_or_exist(lp_pid_directory(), 0755);
1566 if (!ok) {
1567 DEBUG(0, ("Failed to create directory %s for pid files - %s\n",
1568 lp_pid_directory(), strerror(errno)));
1569 exit(1);
1570 }
1571
1572 /* Setup names. */
1573
1574 if (!init_names())
1575 exit(1);
1576
1577 load_interfaces();
1578
1579 if (!secrets_init()) {
1580
1581 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
1582 return False;
1583 }
1584
1585 status = rpccli_pre_open_netlogon_creds();
1586 if (!NT_STATUS_IS_OK(status)) {
1587 DEBUG(0, ("rpccli_pre_open_netlogon_creds() - %s\n",
1588 nt_errstr(status)));
1589 exit(1);
1590 }
1591
1592 /* Unblock all signals we are interested in as they may have been
1593 blocked by the parent process. */
1594
1595 BlockSignals(False, SIGINT);
1596 BlockSignals(False, SIGQUIT);
1597 BlockSignals(False, SIGTERM);
1598 BlockSignals(False, SIGUSR1);
1599 BlockSignals(False, SIGUSR2);
1600 BlockSignals(False, SIGHUP);
1601 BlockSignals(False, SIGCHLD);
1602
1603 if (!interactive)
1604 become_daemon(Fork, no_process_group, log_stdout);
1605
1606 pidfile_create(lp_pid_directory(), "winbindd");
1607
1608 #if HAVE_SETPGID
1609 /*
1610 * If we're interactive we want to set our own process group for
1611 * signal management.
1612 */
1613 if (interactive && !no_process_group)
1614 setpgid( (pid_t)0, (pid_t)0);
1615 #endif
1616
1617 TimeInit();
1618
1619 /* Don't use winbindd_reinit_after_fork here as
1620 * we're just starting up and haven't created any
1621 * winbindd-specific resources we must free yet. JRA.
1622 */
1623
1624 status = reinit_after_fork(winbind_messaging_context(),
1625 winbind_event_context(),
1626 false);
1627 if (!NT_STATUS_IS_OK(status)) {
1628 exit_daemon("Winbindd reinit_after_fork() failed", map_errno_from_nt_status(status));
1629 }
1630
1631 /*
1632 * Do not initialize the parent-child-pipe before becoming
1633 * a daemon: this is used to detect a died parent in the child
1634 * process.
1635 */
1636 status = init_before_fork();
1637 if (!NT_STATUS_IS_OK(status)) {
1638 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1639 }
1640
1641 winbindd_register_handlers(winbind_messaging_context(), !Fork);
1642
1643 if (!messaging_parent_dgm_cleanup_init(winbind_messaging_context())) {
1644 exit(1);
1645 }
1646
1647 status = init_system_session_info();
1648 if (!NT_STATUS_IS_OK(status)) {
1649 exit_daemon("Winbindd failed to setup system user info", map_errno_from_nt_status(status));
1650 }
1651
1652 rpc_lsarpc_init(NULL);
1653 rpc_samr_init(NULL);
1654
1655 winbindd_init_addrchange(NULL, winbind_event_context(),
1656 winbind_messaging_context());
1657
1658 /* setup listen sockets */
1659
1660 if (!winbindd_setup_listeners()) {
1661 exit_daemon("Winbindd failed to setup listeners", EPIPE);
1662 }
1663
1664 irpc_add_name(winbind_imessaging_context(), "winbind_server");
1665
1666 TALLOC_FREE(frame);
1667
1668 if (!interactive) {
1669 daemon_ready("winbindd");
1670 }
1671
1672 /* Loop waiting for requests */
1673 while (1) {
1674 frame = talloc_stackframe();
1675
1676 if (tevent_loop_once(winbind_event_context()) == -1) {
1677 DEBUG(1, ("tevent_loop_once() failed: %s\n",
1678 strerror(errno)));
1679 return 1;
1680 }
1681
1682 TALLOC_FREE(frame);
1683 }
1684
1685 return 0;
1686 }
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