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dsgetdcname: mailslot replies are identical to the cldap ones, use cldap everywhere.
[Samba.git] / source / winbindd / winbindd_cm.c
blob8e7c81405cc4285ee22bb6f030d41f4311cec597
1 /*
2 Unix SMB/CIFS implementation.
3
4 Winbind daemon connection manager
5
6 Copyright (C) Tim Potter 2001
7 Copyright (C) Andrew Bartlett 2002
8 Copyright (C) Gerald (Jerry) Carter 2003-2005.
9 Copyright (C) Volker Lendecke 2004-2005
10 Copyright (C) Jeremy Allison 2006
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 */
25
26 /*
27 We need to manage connections to domain controllers without having to
28 mess up the main winbindd code with other issues. The aim of the
29 connection manager is to:
30
31 - make connections to domain controllers and cache them
32 - re-establish connections when networks or servers go down
33 - centralise the policy on connection timeouts, domain controller
34 selection etc
35 - manage re-entrancy for when winbindd becomes able to handle
36 multiple outstanding rpc requests
37
38 Why not have connection management as part of the rpc layer like tng?
39 Good question. This code may morph into libsmb/rpc_cache.c or something
40 like that but at the moment it's simply staying as part of winbind. I
41 think the TNG architecture of forcing every user of the rpc layer to use
42 the connection caching system is a bad idea. It should be an optional
43 method of using the routines.
44
45 The TNG design is quite good but I disagree with some aspects of the
46 implementation. -tpot
47
48 */
49
50 /*
51 TODO:
52
53 - I'm pretty annoyed by all the make_nmb_name() stuff. It should be
54 moved down into another function.
55
56 - Take care when destroying cli_structs as they can be shared between
57 various sam handles.
58
59 */
60
61 #include "includes.h"
62 #include "winbindd.h"
63
64 #undef DBGC_CLASS
65 #define DBGC_CLASS DBGC_WINBIND
66
67 struct dc_name_ip {
68 fstring name;
69 struct sockaddr_storage ss;
70 };
71
72 extern struct winbindd_methods reconnect_methods;
73 extern bool override_logfile;
74
75 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain);
76 static void set_dc_type_and_flags( struct winbindd_domain *domain );
77 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
78 struct dc_name_ip **dcs, int *num_dcs);
79
80 /****************************************************************
81 Child failed to find DC's. Reschedule check.
82 ****************************************************************/
83
84 static void msg_failed_to_go_online(struct messaging_context *msg,
85 void *private_data,
86 uint32_t msg_type,
87 struct server_id server_id,
88 DATA_BLOB *data)
89 {
90 struct winbindd_domain *domain;
91 const char *domainname = (const char *)data->data;
92
93 if (data->data == NULL || data->length == 0) {
94 return;
95 }
96
97 DEBUG(5,("msg_fail_to_go_online: received for domain %s.\n", domainname));
98
99 for (domain = domain_list(); domain; domain = domain->next) {
100 if (domain->internal) {
101 continue;
102 }
103
104 if (strequal(domain->name, domainname)) {
105 if (domain->online) {
106 /* We're already online, ignore. */
107 DEBUG(5,("msg_fail_to_go_online: domain %s "
108 "already online.\n", domainname));
109 continue;
110 }
111
112 /* Reschedule the online check. */
113 set_domain_offline(domain);
114 break;
115 }
116 }
117 }
118
119 /****************************************************************
120 Actually cause a reconnect from a message.
121 ****************************************************************/
122
123 static void msg_try_to_go_online(struct messaging_context *msg,
124 void *private_data,
125 uint32_t msg_type,
126 struct server_id server_id,
127 DATA_BLOB *data)
128 {
129 struct winbindd_domain *domain;
130 const char *domainname = (const char *)data->data;
131
132 if (data->data == NULL || data->length == 0) {
133 return;
134 }
135
136 DEBUG(5,("msg_try_to_go_online: received for domain %s.\n", domainname));
137
138 for (domain = domain_list(); domain; domain = domain->next) {
139 if (domain->internal) {
140 continue;
141 }
142
143 if (strequal(domain->name, domainname)) {
144
145 if (domain->online) {
146 /* We're already online, ignore. */
147 DEBUG(5,("msg_try_to_go_online: domain %s "
148 "already online.\n", domainname));
149 continue;
150 }
151
152 /* This call takes care of setting the online
153 flag to true if we connected, or re-adding
154 the offline handler if false. Bypasses online
155 check so always does network calls. */
156
157 init_dc_connection_network(domain);
158 break;
159 }
160 }
161 }
162
163 /****************************************************************
164 Fork a child to try and contact a DC. Do this as contacting a
165 DC requires blocking lookups and we don't want to block our
166 parent.
167 ****************************************************************/
168
169 static bool fork_child_dc_connect(struct winbindd_domain *domain)
170 {
171 struct dc_name_ip *dcs = NULL;
172 int num_dcs = 0;
173 TALLOC_CTX *mem_ctx = NULL;
174 pid_t child_pid;
175 pid_t parent_pid = sys_getpid();
176
177 /* Stop zombies */
178 CatchChild();
179
180 child_pid = sys_fork();
181
182 if (child_pid == -1) {
183 DEBUG(0, ("fork_child_dc_connect: Could not fork: %s\n", strerror(errno)));
184 return False;
185 }
186
187 if (child_pid != 0) {
188 /* Parent */
189 messaging_register(winbind_messaging_context(), NULL,
190 MSG_WINBIND_TRY_TO_GO_ONLINE,
191 msg_try_to_go_online);
192 messaging_register(winbind_messaging_context(), NULL,
193 MSG_WINBIND_FAILED_TO_GO_ONLINE,
194 msg_failed_to_go_online);
195 return True;
196 }
197
198 /* Child. */
199
200 /* Leave messages blocked - we will never process one. */
201
202 if (!reinit_after_fork(winbind_messaging_context(), true)) {
203 DEBUG(0,("reinit_after_fork() failed\n"));
204 _exit(0);
205 }
206
207 close_conns_after_fork();
208
209 if (!override_logfile) {
210 char *logfile;
211 if (asprintf(&logfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) > 0) {
212 lp_set_logfile(logfile);
213 SAFE_FREE(logfile);
214 reopen_logs();
215 }
216 }
217
218 mem_ctx = talloc_init("fork_child_dc_connect");
219 if (!mem_ctx) {
220 DEBUG(0,("talloc_init failed.\n"));
221 _exit(0);
222 }
223
224 if ((!get_dcs(mem_ctx, domain, &dcs, &num_dcs)) || (num_dcs == 0)) {
225 /* Still offline ? Can't find DC's. */
226 messaging_send_buf(winbind_messaging_context(),
227 pid_to_procid(parent_pid),
228 MSG_WINBIND_FAILED_TO_GO_ONLINE,
229 (uint8 *)domain->name,
230 strlen(domain->name)+1);
231 _exit(0);
232 }
233
234 /* We got a DC. Send a message to our parent to get it to
235 try and do the same. */
236
237 messaging_send_buf(winbind_messaging_context(),
238 pid_to_procid(parent_pid),
239 MSG_WINBIND_TRY_TO_GO_ONLINE,
240 (uint8 *)domain->name,
241 strlen(domain->name)+1);
242 _exit(0);
243 }
244
245 /****************************************************************
246 Handler triggered if we're offline to try and detect a DC.
247 ****************************************************************/
248
249 static void check_domain_online_handler(struct event_context *ctx,
250 struct timed_event *te,
251 const struct timeval *now,
252 void *private_data)
253 {
254 struct winbindd_domain *domain =
255 (struct winbindd_domain *)private_data;
256
257 DEBUG(10,("check_domain_online_handler: called for domain "
258 "%s (online = %s)\n", domain->name,
259 domain->online ? "True" : "False" ));
260
261 TALLOC_FREE(domain->check_online_event);
262
263 /* Are we still in "startup" mode ? */
264
265 if (domain->startup && (now->tv_sec > domain->startup_time + 30)) {
266 /* No longer in "startup" mode. */
267 DEBUG(10,("check_domain_online_handler: domain %s no longer in 'startup' mode.\n",
268 domain->name ));
269 domain->startup = False;
270 }
271
272 /* We've been told to stay offline, so stay
273 that way. */
274
275 if (get_global_winbindd_state_offline()) {
276 DEBUG(10,("check_domain_online_handler: domain %s remaining globally offline\n",
277 domain->name ));
278 return;
279 }
280
281 /* Fork a child to test if it can contact a DC.
282 If it can then send ourselves a message to
283 cause a reconnect. */
284
285 fork_child_dc_connect(domain);
286 }
287
288 /****************************************************************
289 If we're still offline setup the timeout check.
290 ****************************************************************/
291
292 static void calc_new_online_timeout_check(struct winbindd_domain *domain)
293 {
294 int wbc = lp_winbind_cache_time();
295
296 if (domain->startup) {
297 domain->check_online_timeout = 10;
298 } else if (domain->check_online_timeout < wbc) {
299 domain->check_online_timeout = wbc;
300 }
301 }
302
303 /****************************************************************
304 Set domain offline and also add handler to put us back online
305 if we detect a DC.
306 ****************************************************************/
307
308 void set_domain_offline(struct winbindd_domain *domain)
309 {
310 DEBUG(10,("set_domain_offline: called for domain %s\n",
311 domain->name ));
312
313 TALLOC_FREE(domain->check_online_event);
314
315 if (domain->internal) {
316 DEBUG(3,("set_domain_offline: domain %s is internal - logic error.\n",
317 domain->name ));
318 return;
319 }
320
321 domain->online = False;
322
323 /* Offline domains are always initialized. They're
324 re-initialized when they go back online. */
325
326 domain->initialized = True;
327
328 /* We only add the timeout handler that checks and
329 allows us to go back online when we've not
330 been told to remain offline. */
331
332 if (get_global_winbindd_state_offline()) {
333 DEBUG(10,("set_domain_offline: domain %s remaining globally offline\n",
334 domain->name ));
335 return;
336 }
337
338 /* If we're in statup mode, check again in 10 seconds, not in
339 lp_winbind_cache_time() seconds (which is 5 mins by default). */
340
341 calc_new_online_timeout_check(domain);
342
343 domain->check_online_event = event_add_timed(winbind_event_context(),
344 NULL,
345 timeval_current_ofs(domain->check_online_timeout,0),
346 "check_domain_online_handler",
347 check_domain_online_handler,
348 domain);
349
350 /* The above *has* to succeed for winbindd to work. */
351 if (!domain->check_online_event) {
352 smb_panic("set_domain_offline: failed to add online handler");
353 }
354
355 DEBUG(10,("set_domain_offline: added event handler for domain %s\n",
356 domain->name ));
357
358 /* Send an offline message to the idmap child when our
359 primary domain goes offline */
360
361 if ( domain->primary ) {
362 struct winbindd_child *idmap = idmap_child();
363
364 if ( idmap->pid != 0 ) {
365 messaging_send_buf(winbind_messaging_context(),
366 pid_to_procid(idmap->pid),
367 MSG_WINBIND_OFFLINE,
368 (uint8 *)domain->name,
369 strlen(domain->name)+1);
370 }
371 }
372
373 return;
374 }
375
376 /****************************************************************
377 Set domain online - if allowed.
378 ****************************************************************/
379
380 static void set_domain_online(struct winbindd_domain *domain)
381 {
382 struct timeval now;
383
384 DEBUG(10,("set_domain_online: called for domain %s\n",
385 domain->name ));
386
387 if (domain->internal) {
388 DEBUG(3,("set_domain_online: domain %s is internal - logic error.\n",
389 domain->name ));
390 return;
391 }
392
393 if (get_global_winbindd_state_offline()) {
394 DEBUG(10,("set_domain_online: domain %s remaining globally offline\n",
395 domain->name ));
396 return;
397 }
398
399 winbindd_set_locator_kdc_envs(domain);
400
401 /* If we are waiting to get a krb5 ticket, trigger immediately. */
402 GetTimeOfDay(&now);
403 set_event_dispatch_time(winbind_event_context(),
404 "krb5_ticket_gain_handler", now);
405
406 /* Ok, we're out of any startup mode now... */
407 domain->startup = False;
408
409 if (domain->online == False) {
410 /* We were offline - now we're online. We default to
411 using the MS-RPC backend if we started offline,
412 and if we're going online for the first time we
413 should really re-initialize the backends and the
414 checks to see if we're talking to an AD or NT domain.
415 */
416
417 domain->initialized = False;
418
419 /* 'reconnect_methods' is the MS-RPC backend. */
420 if (domain->backend == &reconnect_methods) {
421 domain->backend = NULL;
422 }
423 }
424
425 /* Ensure we have no online timeout checks. */
426 domain->check_online_timeout = 0;
427 TALLOC_FREE(domain->check_online_event);
428
429 /* Ensure we ignore any pending child messages. */
430 messaging_deregister(winbind_messaging_context(),
431 MSG_WINBIND_TRY_TO_GO_ONLINE, NULL);
432 messaging_deregister(winbind_messaging_context(),
433 MSG_WINBIND_FAILED_TO_GO_ONLINE, NULL);
434
435 domain->online = True;
436
437 /* Send an online message to the idmap child when our
438 primary domain comes online */
439
440 if ( domain->primary ) {
441 struct winbindd_child *idmap = idmap_child();
442
443 if ( idmap->pid != 0 ) {
444 messaging_send_buf(winbind_messaging_context(),
445 pid_to_procid(idmap->pid),
446 MSG_WINBIND_ONLINE,
447 (uint8 *)domain->name,
448 strlen(domain->name)+1);
449 }
450 }
451
452 return;
453 }
454
455 /****************************************************************
456 Requested to set a domain online.
457 ****************************************************************/
458
459 void set_domain_online_request(struct winbindd_domain *domain)
460 {
461 struct timeval tev;
462
463 DEBUG(10,("set_domain_online_request: called for domain %s\n",
464 domain->name ));
465
466 if (get_global_winbindd_state_offline()) {
467 DEBUG(10,("set_domain_online_request: domain %s remaining globally offline\n",
468 domain->name ));
469 return;
470 }
471
472 /* We've been told it's safe to go online and
473 try and connect to a DC. But I don't believe it
474 because network manager seems to lie.
475 Wait at least 5 seconds. Heuristics suck... */
476
477 if (!domain->check_online_event) {
478 /* If we've come from being globally offline we
479 don't have a check online event handler set.
480 We need to add one now we're trying to go
481 back online. */
482
483 DEBUG(10,("set_domain_online_request: domain %s was globally offline.\n",
484 domain->name ));
485
486 domain->check_online_event = event_add_timed(winbind_event_context(),
487 NULL,
488 timeval_current_ofs(5, 0),
489 "check_domain_online_handler",
490 check_domain_online_handler,
491 domain);
492
493 /* The above *has* to succeed for winbindd to work. */
494 if (!domain->check_online_event) {
495 smb_panic("set_domain_online_request: failed to add online handler");
496 }
497 }
498
499 GetTimeOfDay(&tev);
500
501 /* Go into "startup" mode again. */
502 domain->startup_time = tev.tv_sec;
503 domain->startup = True;
504
505 tev.tv_sec += 5;
506
507 set_event_dispatch_time(winbind_event_context(), "check_domain_online_handler", tev);
508 }
509
510 /****************************************************************
511 Add -ve connection cache entries for domain and realm.
512 ****************************************************************/
513
514 void winbind_add_failed_connection_entry(const struct winbindd_domain *domain,
515 const char *server,
516 NTSTATUS result)
517 {
518 add_failed_connection_entry(domain->name, server, result);
519 /* If this was the saf name for the last thing we talked to,
520 remove it. */
521 saf_delete(domain->name);
522 if (*domain->alt_name) {
523 add_failed_connection_entry(domain->alt_name, server, result);
524 saf_delete(domain->alt_name);
525 }
526 winbindd_unset_locator_kdc_env(domain);
527 }
528
529 /* Choose between anonymous or authenticated connections. We need to use
530 an authenticated connection if DCs have the RestrictAnonymous registry
531 entry set > 0, or the "Additional restrictions for anonymous
532 connections" set in the win2k Local Security Policy.
533
534 Caller to free() result in domain, username, password
535 */
536
537 static void cm_get_ipc_userpass(char **username, char **domain, char **password)
538 {
539 *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
540 *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
541 *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
542
543 if (*username && **username) {
544
545 if (!*domain || !**domain)
546 *domain = smb_xstrdup(lp_workgroup());
547
548 if (!*password || !**password)
549 *password = smb_xstrdup("");
550
551 DEBUG(3, ("cm_get_ipc_userpass: Retrieved auth-user from secrets.tdb [%s\\%s]\n",
552 *domain, *username));
553
554 } else {
555 DEBUG(3, ("cm_get_ipc_userpass: No auth-user defined\n"));
556 *username = smb_xstrdup("");
557 *domain = smb_xstrdup("");
558 *password = smb_xstrdup("");
559 }
560 }
561
562 static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
563 fstring dcname,
564 struct sockaddr_storage *dc_ss)
565 {
566 struct winbindd_domain *our_domain = NULL;
567 struct rpc_pipe_client *netlogon_pipe = NULL;
568 NTSTATUS result;
569 WERROR werr;
570 TALLOC_CTX *mem_ctx;
571 unsigned int orig_timeout;
572 const char *tmp = NULL;
573 const char *p;
574
575 /* Hmmmm. We can only open one connection to the NETLOGON pipe at the
576 * moment.... */
577
578 if (IS_DC) {
579 return False;
580 }
581
582 if (domain->primary) {
583 return False;
584 }
585
586 our_domain = find_our_domain();
587
588 if ((mem_ctx = talloc_init("get_dc_name_via_netlogon")) == NULL) {
589 return False;
590 }
591
592 result = cm_connect_netlogon(our_domain, &netlogon_pipe);
593 if (!NT_STATUS_IS_OK(result)) {
594 talloc_destroy(mem_ctx);
595 return False;
596 }
597
598 /* This call can take a long time - allow the server to time out.
599 35 seconds should do it. */
600
601 orig_timeout = cli_set_timeout(netlogon_pipe->cli, 35000);
602
603 if (our_domain->active_directory) {
604 struct netr_DsRGetDCNameInfo *domain_info = NULL;
605
606 result = rpccli_netr_DsRGetDCName(netlogon_pipe,
607 mem_ctx,
608 our_domain->dcname,
609 domain->name,
610 NULL,
611 NULL,
612 DS_RETURN_DNS_NAME,
613 &domain_info,
614 &werr);
615 if (W_ERROR_IS_OK(werr)) {
616 tmp = talloc_strdup(
617 mem_ctx, domain_info->dc_unc);
618 if (tmp == NULL) {
619 DEBUG(0, ("talloc_strdup failed\n"));
620 talloc_destroy(mem_ctx);
621 return false;
622 }
623 if (strlen(domain->alt_name) == 0) {
624 fstrcpy(domain->alt_name,
625 domain_info->domain_name);
626 }
627 if (strlen(domain->forest_name) == 0) {
628 fstrcpy(domain->forest_name,
629 domain_info->forest_name);
630 }
631 }
632 } else {
633 result = rpccli_netr_GetAnyDCName(netlogon_pipe, mem_ctx,
634 our_domain->dcname,
635 domain->name,
636 &tmp,
637 &werr);
638 }
639
640 /* And restore our original timeout. */
641 cli_set_timeout(netlogon_pipe->cli, orig_timeout);
642
643 if (!NT_STATUS_IS_OK(result)) {
644 DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
645 nt_errstr(result)));
646 talloc_destroy(mem_ctx);
647 return false;
648 }
649
650 if (!W_ERROR_IS_OK(werr)) {
651 DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
652 dos_errstr(werr)));
653 talloc_destroy(mem_ctx);
654 return false;
655 }
656
657 /* rpccli_netr_GetAnyDCName gives us a name with \\ */
658 p = tmp;
659 if (*p == '\\') {
660 p+=1;
661 }
662 if (*p == '\\') {
663 p+=1;
664 }
665
666 fstrcpy(dcname, p);
667
668 talloc_destroy(mem_ctx);
669
670 DEBUG(10,("rpccli_netr_GetAnyDCName returned %s\n", dcname));
671
672 if (!resolve_name(dcname, dc_ss, 0x20)) {
673 return False;
674 }
675
676 return True;
677 }
678
679 /**
680 * Helper function to assemble trust password and account name
681 */
682 static NTSTATUS get_trust_creds(const struct winbindd_domain *domain,
683 char **machine_password,
684 char **machine_account,
685 char **machine_krb5_principal)
686 {
687 const char *account_name;
688 const char *name = NULL;
689
690 /* If we are a DC and this is not our own domain */
691
692 if (IS_DC) {
693 name = domain->name;
694 } else {
695 struct winbindd_domain *our_domain = find_our_domain();
696
697 if (!our_domain)
698 return NT_STATUS_INVALID_SERVER_STATE;
699
700 name = our_domain->name;
701 }
702
703 if (!get_trust_pw_clear(name, machine_password,
704 &account_name, NULL))
705 {
706 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
707 }
708
709 if ((machine_account != NULL) &&
710 (asprintf(machine_account, "%s$", account_name) == -1))
711 {
712 return NT_STATUS_NO_MEMORY;
713 }
714
715 /* For now assume our machine account only exists in our domain */
716
717 if (machine_krb5_principal != NULL)
718 {
719 if (asprintf(machine_krb5_principal, "%s$@%s",
720 account_name, lp_realm()) == -1)
721 {
722 return NT_STATUS_NO_MEMORY;
723 }
724
725 strupper_m(*machine_krb5_principal);
726 }
727
728 return NT_STATUS_OK;
729 }
730
731 /************************************************************************
732 Given a fd with a just-connected TCP connection to a DC, open a connection
733 to the pipe.
734 ************************************************************************/
735
736 static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
737 const int sockfd,
738 const char *controller,
739 struct cli_state **cli,
740 bool *retry)
741 {
742 char *machine_password = NULL;
743 char *machine_krb5_principal = NULL;
744 char *machine_account = NULL;
745 char *ipc_username = NULL;
746 char *ipc_domain = NULL;
747 char *ipc_password = NULL;
748
749 struct named_mutex *mutex;
750
751 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
752
753 struct sockaddr peeraddr;
754 socklen_t peeraddr_len;
755
756 struct sockaddr_in *peeraddr_in = (struct sockaddr_in *)&peeraddr;
757
758 DEBUG(10,("cm_prepare_connection: connecting to DC %s for domain %s\n",
759 controller, domain->name ));
760
761 *retry = True;
762
763 mutex = grab_named_mutex(talloc_tos(), controller,
764 WINBIND_SERVER_MUTEX_WAIT_TIME);
765 if (mutex == NULL) {
766 DEBUG(0,("cm_prepare_connection: mutex grab failed for %s\n",
767 controller));
768 result = NT_STATUS_POSSIBLE_DEADLOCK;
769 goto done;
770 }
771
772 if ((*cli = cli_initialise()) == NULL) {
773 DEBUG(1, ("Could not cli_initialize\n"));
774 result = NT_STATUS_NO_MEMORY;
775 goto done;
776 }
777
778 (*cli)->timeout = 10000; /* 10 seconds */
779 (*cli)->fd = sockfd;
780 fstrcpy((*cli)->desthost, controller);
781 (*cli)->use_kerberos = True;
782
783 peeraddr_len = sizeof(peeraddr);
784
785 if ((getpeername((*cli)->fd, &peeraddr, &peeraddr_len) != 0) ||
786 (peeraddr_len != sizeof(struct sockaddr_in)) ||
787 (peeraddr_in->sin_family != PF_INET))
788 {
789 DEBUG(0,("cm_prepare_connection: %s\n", strerror(errno)));
790 result = NT_STATUS_UNSUCCESSFUL;
791 goto done;
792 }
793
794 if (ntohs(peeraddr_in->sin_port) == 139) {
795 struct nmb_name calling;
796 struct nmb_name called;
797
798 make_nmb_name(&calling, global_myname(), 0x0);
799 make_nmb_name(&called, "*SMBSERVER", 0x20);
800
801 if (!cli_session_request(*cli, &calling, &called)) {
802 DEBUG(8, ("cli_session_request failed for %s\n",
803 controller));
804 result = NT_STATUS_UNSUCCESSFUL;
805 goto done;
806 }
807 }
808
809 cli_setup_signing_state(*cli, Undefined);
810
811 if (!cli_negprot(*cli)) {
812 DEBUG(1, ("cli_negprot failed\n"));
813 result = NT_STATUS_UNSUCCESSFUL;
814 goto done;
815 }
816
817 if (!is_trusted_domain_situation(domain->name) &&
818 (*cli)->protocol >= PROTOCOL_NT1 &&
819 (*cli)->capabilities & CAP_EXTENDED_SECURITY)
820 {
821 ADS_STATUS ads_status;
822
823 result = get_trust_creds(domain, &machine_password,
824 &machine_account,
825 &machine_krb5_principal);
826 if (!NT_STATUS_IS_OK(result)) {
827 goto anon_fallback;
828 }
829
830 if (lp_security() == SEC_ADS) {
831
832 /* Try a krb5 session */
833
834 (*cli)->use_kerberos = True;
835 DEBUG(5, ("connecting to %s from %s with kerberos principal "
836 "[%s] and realm [%s]\n", controller, global_myname(),
837 machine_krb5_principal, domain->alt_name));
838
839 winbindd_set_locator_kdc_envs(domain);
840
841 ads_status = cli_session_setup_spnego(*cli,
842 machine_krb5_principal,
843 machine_password,
844 lp_workgroup(),
845 domain->name);
846
847 if (!ADS_ERR_OK(ads_status)) {
848 DEBUG(4,("failed kerberos session setup with %s\n",
849 ads_errstr(ads_status)));
850 }
851
852 result = ads_ntstatus(ads_status);
853 if (NT_STATUS_IS_OK(result)) {
854 /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
855 cli_init_creds(*cli, machine_account, domain->name, machine_password);
856 goto session_setup_done;
857 }
858 }
859
860 /* Fall back to non-kerberos session setup using NTLMSSP SPNEGO with the machine account. */
861 (*cli)->use_kerberos = False;
862
863 DEBUG(5, ("connecting to %s from %s with username "
864 "[%s]\\[%s]\n", controller, global_myname(),
865 lp_workgroup(), machine_account));
866
867 ads_status = cli_session_setup_spnego(*cli,
868 machine_account,
869 machine_password,
870 lp_workgroup(),
871 NULL);
872 if (!ADS_ERR_OK(ads_status)) {
873 DEBUG(4, ("authenticated session setup failed with %s\n",
874 ads_errstr(ads_status)));
875 }
876
877 result = ads_ntstatus(ads_status);
878 if (NT_STATUS_IS_OK(result)) {
879 /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
880 cli_init_creds(*cli, machine_account, domain->name, machine_password);
881 goto session_setup_done;
882 }
883 }
884
885 /* Fall back to non-kerberos session setup with auth_user */
886
887 (*cli)->use_kerberos = False;
888
889 cm_get_ipc_userpass(&ipc_username, &ipc_domain, &ipc_password);
890
891 if ((((*cli)->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) != 0) &&
892 (strlen(ipc_username) > 0)) {
893
894 /* Only try authenticated if we have a username */
895
896 DEBUG(5, ("connecting to %s from %s with username "
897 "[%s]\\[%s]\n", controller, global_myname(),
898 ipc_domain, ipc_username));
899
900 if (NT_STATUS_IS_OK(cli_session_setup(
901 *cli, ipc_username,
902 ipc_password, strlen(ipc_password)+1,
903 ipc_password, strlen(ipc_password)+1,
904 ipc_domain))) {
905 /* Successful logon with given username. */
906 cli_init_creds(*cli, ipc_username, ipc_domain, ipc_password);
907 goto session_setup_done;
908 } else {
909 DEBUG(4, ("authenticated session setup with user %s\\%s failed.\n",
910 ipc_domain, ipc_username ));
911 }
912 }
913
914 anon_fallback:
915
916 /* Fall back to anonymous connection, this might fail later */
917
918 if (NT_STATUS_IS_OK(cli_session_setup(*cli, "", NULL, 0,
919 NULL, 0, ""))) {
920 DEBUG(5, ("Connected anonymously\n"));
921 cli_init_creds(*cli, "", "", "");
922 goto session_setup_done;
923 }
924
925 result = cli_nt_error(*cli);
926
927 if (NT_STATUS_IS_OK(result))
928 result = NT_STATUS_UNSUCCESSFUL;
929
930 /* We can't session setup */
931
932 goto done;
933
934 session_setup_done:
935
936 /* cache the server name for later connections */
937
938 saf_store( domain->name, (*cli)->desthost );
939 if (domain->alt_name && (*cli)->use_kerberos) {
940 saf_store( domain->alt_name, (*cli)->desthost );
941 }
942
943 winbindd_set_locator_kdc_envs(domain);
944
945 if (!cli_send_tconX(*cli, "IPC$", "IPC", "", 0)) {
946
947 result = cli_nt_error(*cli);
948
949 DEBUG(1,("failed tcon_X with %s\n", nt_errstr(result)));
950
951 if (NT_STATUS_IS_OK(result))
952 result = NT_STATUS_UNSUCCESSFUL;
953
954 goto done;
955 }
956
957 TALLOC_FREE(mutex);
958 *retry = False;
959
960 /* set the domain if empty; needed for schannel connections */
961 if ( !*(*cli)->domain ) {
962 fstrcpy( (*cli)->domain, domain->name );
963 }
964
965 result = NT_STATUS_OK;
966
967 done:
968 TALLOC_FREE(mutex);
969 SAFE_FREE(machine_account);
970 SAFE_FREE(machine_password);
971 SAFE_FREE(machine_krb5_principal);
972 SAFE_FREE(ipc_username);
973 SAFE_FREE(ipc_domain);
974 SAFE_FREE(ipc_password);
975
976 if (!NT_STATUS_IS_OK(result)) {
977 winbind_add_failed_connection_entry(domain, controller, result);
978 if ((*cli) != NULL) {
979 cli_shutdown(*cli);
980 *cli = NULL;
981 }
982 }
983
984 return result;
985 }
986
987 static bool add_one_dc_unique(TALLOC_CTX *mem_ctx, const char *domain_name,
988 const char *dcname, struct sockaddr_storage *pss,
989 struct dc_name_ip **dcs, int *num)
990 {
991 if (!NT_STATUS_IS_OK(check_negative_conn_cache(domain_name, dcname))) {
992 DEBUG(10, ("DC %s was in the negative conn cache\n", dcname));
993 return False;
994 }
995
996 *dcs = TALLOC_REALLOC_ARRAY(mem_ctx, *dcs, struct dc_name_ip, (*num)+1);
997
998 if (*dcs == NULL)
999 return False;
1000
1001 fstrcpy((*dcs)[*num].name, dcname);
1002 (*dcs)[*num].ss = *pss;
1003 *num += 1;
1004 return True;
1005 }
1006
1007 static bool add_sockaddr_to_array(TALLOC_CTX *mem_ctx,
1008 struct sockaddr_storage *pss, uint16 port,
1009 struct sockaddr_storage **addrs, int *num)
1010 {
1011 *addrs = TALLOC_REALLOC_ARRAY(mem_ctx, *addrs, struct sockaddr_storage, (*num)+1);
1012
1013 if (*addrs == NULL) {
1014 *num = 0;
1015 return False;
1016 }
1017
1018 (*addrs)[*num] = *pss;
1019 set_sockaddr_port(&(*addrs)[*num], port);
1020
1021 *num += 1;
1022 return True;
1023 }
1024
1025 /*******************************************************************
1026 convert an ip to a name
1027 *******************************************************************/
1028
1029 static bool dcip_to_name(TALLOC_CTX *mem_ctx,
1030 const struct winbindd_domain *domain,
1031 struct sockaddr_storage *pss,
1032 fstring name )
1033 {
1034 struct ip_service ip_list;
1035 uint32_t nt_version = NETLOGON_VERSION_1;
1036
1037 ip_list.ss = *pss;
1038 ip_list.port = 0;
1039
1040 #ifdef WITH_ADS
1041 /* For active directory servers, try to get the ldap server name.
1042 None of these failures should be considered critical for now */
1043
1044 if (lp_security() == SEC_ADS) {
1045 ADS_STRUCT *ads;
1046 char addr[INET6_ADDRSTRLEN];
1047
1048 print_sockaddr(addr, sizeof(addr), pss);
1049
1050 ads = ads_init(domain->alt_name, domain->name, NULL);
1051 ads->auth.flags |= ADS_AUTH_NO_BIND;
1052
1053 if (ads_try_connect(ads, addr)) {
1054 /* We got a cldap packet. */
1055 fstrcpy(name, ads->config.ldap_server_name);
1056 namecache_store(name, 0x20, 1, &ip_list);
1057
1058 DEBUG(10,("dcip_to_name: flags = 0x%x\n", (unsigned int)ads->config.flags));
1059
1060 if (domain->primary && (ads->config.flags & NBT_SERVER_KDC)) {
1061 if (ads_closest_dc(ads)) {
1062 char *sitename = sitename_fetch(ads->config.realm);
1063
1064 /* We're going to use this KDC for this realm/domain.
1065 If we are using sites, then force the krb5 libs
1066 to use this KDC. */
1067
1068 create_local_private_krb5_conf_for_domain(domain->alt_name,
1069 domain->name,
1070 sitename,
1071 pss);
1072
1073 SAFE_FREE(sitename);
1074 } else {
1075 /* use an off site KDC */
1076 create_local_private_krb5_conf_for_domain(domain->alt_name,
1077 domain->name,
1078 NULL,
1079 pss);
1080 }
1081 winbindd_set_locator_kdc_envs(domain);
1082
1083 /* Ensure we contact this DC also. */
1084 saf_store( domain->name, name);
1085 saf_store( domain->alt_name, name);
1086 }
1087
1088 ads_destroy( &ads );
1089 return True;
1090 }
1091
1092 ads_destroy( &ads );
1093 }
1094 #endif
1095
1096 /* try GETDC requests next */
1097
1098 if (send_getdc_request(mem_ctx, winbind_messaging_context(),
1099 pss, domain->name, &domain->sid,
1100 nt_version)) {
1101 const char *dc_name = NULL;
1102 int i;
1103 smb_msleep(100);
1104 for (i=0; i<5; i++) {
1105 if (receive_getdc_response(mem_ctx, pss, domain->name,
1106 &nt_version,
1107 &dc_name, NULL)) {
1108 fstrcpy(name, dc_name);
1109 namecache_store(name, 0x20, 1, &ip_list);
1110 return True;
1111 }
1112 smb_msleep(500);
1113 }
1114 }
1115
1116 /* try node status request */
1117
1118 if ( name_status_find(domain->name, 0x1c, 0x20, pss, name) ) {
1119 namecache_store(name, 0x20, 1, &ip_list);
1120 return True;
1121 }
1122 return False;
1123 }
1124
1125 /*******************************************************************
1126 Retreive a list of IP address for domain controllers. Fill in
1127 the dcs[] with results.
1128 *******************************************************************/
1129
1130 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
1131 struct dc_name_ip **dcs, int *num_dcs)
1132 {
1133 fstring dcname;
1134 struct sockaddr_storage ss;
1135 struct ip_service *ip_list = NULL;
1136 int iplist_size = 0;
1137 int i;
1138 bool is_our_domain;
1139 enum security_types sec = (enum security_types)lp_security();
1140
1141 is_our_domain = strequal(domain->name, lp_workgroup());
1142
1143 if ( !is_our_domain
1144 && get_dc_name_via_netlogon(domain, dcname, &ss)
1145 && add_one_dc_unique(mem_ctx, domain->name, dcname, &ss, dcs, num_dcs) )
1146 {
1147 char addr[INET6_ADDRSTRLEN];
1148 print_sockaddr(addr, sizeof(addr), &ss);
1149 DEBUG(10, ("Retrieved DC %s at %s via netlogon\n",
1150 dcname, addr));
1151 return True;
1152 }
1153
1154 if (sec == SEC_ADS) {
1155 char *sitename = NULL;
1156
1157 /* We need to make sure we know the local site before
1158 doing any DNS queries, as this will restrict the
1159 get_sorted_dc_list() call below to only fetching
1160 DNS records for the correct site. */
1161
1162 /* Find any DC to get the site record.
1163 We deliberately don't care about the
1164 return here. */
1165
1166 get_dc_name(domain->name, domain->alt_name, dcname, &ss);
1167
1168 sitename = sitename_fetch(domain->alt_name);
1169 if (sitename) {
1170
1171 /* Do the site-specific AD dns lookup first. */
1172 get_sorted_dc_list(domain->alt_name, sitename, &ip_list, &iplist_size, True);
1173
1174 for ( i=0; i<iplist_size; i++ ) {
1175 char addr[INET6_ADDRSTRLEN];
1176 print_sockaddr(addr, sizeof(addr),
1177 &ip_list[i].ss);
1178 add_one_dc_unique(mem_ctx,
1179 domain->name,
1180 addr,
1181 &ip_list[i].ss,
1182 dcs,
1183 num_dcs);
1184 }
1185
1186 SAFE_FREE(ip_list);
1187 SAFE_FREE(sitename);
1188 iplist_size = 0;
1189 }
1190
1191 /* Now we add DCs from the main AD dns lookup. */
1192 get_sorted_dc_list(domain->alt_name, NULL, &ip_list, &iplist_size, True);
1193
1194 for ( i=0; i<iplist_size; i++ ) {
1195 char addr[INET6_ADDRSTRLEN];
1196 print_sockaddr(addr, sizeof(addr),
1197 &ip_list[i].ss);
1198 add_one_dc_unique(mem_ctx,
1199 domain->name,
1200 addr,
1201 &ip_list[i].ss,
1202 dcs,
1203 num_dcs);
1204 }
1205 }
1206
1207 /* try standard netbios queries if no ADS */
1208
1209 if (iplist_size==0) {
1210 get_sorted_dc_list(domain->name, NULL, &ip_list, &iplist_size, False);
1211 }
1212
1213 /* FIXME!! this is where we should re-insert the GETDC requests --jerry */
1214
1215 /* now add to the dc array. We'll wait until the last minute
1216 to look up the name of the DC. But we fill in the char* for
1217 the ip now in to make the failed connection cache work */
1218
1219 for ( i=0; i<iplist_size; i++ ) {
1220 char addr[INET6_ADDRSTRLEN];
1221 print_sockaddr(addr, sizeof(addr),
1222 &ip_list[i].ss);
1223 add_one_dc_unique(mem_ctx, domain->name, addr,
1224 &ip_list[i].ss, dcs, num_dcs);
1225 }
1226
1227 SAFE_FREE( ip_list );
1228
1229 return True;
1230 }
1231
1232 static bool find_new_dc(TALLOC_CTX *mem_ctx,
1233 struct winbindd_domain *domain,
1234 fstring dcname, struct sockaddr_storage *pss, int *fd)
1235 {
1236 struct dc_name_ip *dcs = NULL;
1237 int num_dcs = 0;
1238
1239 const char **dcnames = NULL;
1240 int num_dcnames = 0;
1241
1242 struct sockaddr_storage *addrs = NULL;
1243 int num_addrs = 0;
1244
1245 int i, fd_index;
1246
1247 again:
1248 if (!get_dcs(mem_ctx, domain, &dcs, &num_dcs) || (num_dcs == 0))
1249 return False;
1250
1251 for (i=0; i<num_dcs; i++) {
1252
1253 if (!add_string_to_array(mem_ctx, dcs[i].name,
1254 &dcnames, &num_dcnames)) {
1255 return False;
1256 }
1257 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 445,
1258 &addrs, &num_addrs)) {
1259 return False;
1260 }
1261
1262 if (!add_string_to_array(mem_ctx, dcs[i].name,
1263 &dcnames, &num_dcnames)) {
1264 return False;
1265 }
1266 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 139,
1267 &addrs, &num_addrs)) {
1268 return False;
1269 }
1270 }
1271
1272 if ((num_dcnames == 0) || (num_dcnames != num_addrs))
1273 return False;
1274
1275 if ((addrs == NULL) || (dcnames == NULL))
1276 return False;
1277
1278 /* 5 second timeout. */
1279 if (!open_any_socket_out(addrs, num_addrs, 5000, &fd_index, fd) ) {
1280 for (i=0; i<num_dcs; i++) {
1281 char ab[INET6_ADDRSTRLEN];
1282 print_sockaddr(ab, sizeof(ab), &dcs[i].ss);
1283 DEBUG(10, ("find_new_dc: open_any_socket_out failed for "
1284 "domain %s address %s. Error was %s\n",
1285 domain->name, ab, strerror(errno) ));
1286 winbind_add_failed_connection_entry(domain,
1287 dcs[i].name, NT_STATUS_UNSUCCESSFUL);
1288 }
1289 return False;
1290 }
1291
1292 *pss = addrs[fd_index];
1293
1294 if (*dcnames[fd_index] != '\0' && !is_ipaddress(dcnames[fd_index])) {
1295 /* Ok, we've got a name for the DC */
1296 fstrcpy(dcname, dcnames[fd_index]);
1297 return True;
1298 }
1299
1300 /* Try to figure out the name */
1301 if (dcip_to_name(mem_ctx, domain, pss, dcname)) {
1302 return True;
1303 }
1304
1305 /* We can not continue without the DC's name */
1306 winbind_add_failed_connection_entry(domain, dcs[fd_index].name,
1307 NT_STATUS_UNSUCCESSFUL);
1308 goto again;
1309 }
1310
1311 static NTSTATUS cm_open_connection(struct winbindd_domain *domain,
1312 struct winbindd_cm_conn *new_conn)
1313 {
1314 TALLOC_CTX *mem_ctx;
1315 NTSTATUS result;
1316 char *saf_servername = saf_fetch( domain->name );
1317 int retries;
1318
1319 if ((mem_ctx = talloc_init("cm_open_connection")) == NULL) {
1320 SAFE_FREE(saf_servername);
1321 set_domain_offline(domain);
1322 return NT_STATUS_NO_MEMORY;
1323 }
1324
1325 /* we have to check the server affinity cache here since
1326 later we selecte a DC based on response time and not preference */
1327
1328 /* Check the negative connection cache
1329 before talking to it. It going down may have
1330 triggered the reconnection. */
1331
1332 if ( saf_servername && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, saf_servername))) {
1333
1334 DEBUG(10,("cm_open_connection: saf_servername is '%s' for domain %s\n",
1335 saf_servername, domain->name ));
1336
1337 /* convert an ip address to a name */
1338 if (is_ipaddress( saf_servername ) ) {
1339 fstring saf_name;
1340 struct sockaddr_storage ss;
1341
1342 if (!interpret_string_addr(&ss, saf_servername,
1343 AI_NUMERICHOST)) {
1344 return NT_STATUS_UNSUCCESSFUL;
1345 }
1346 if (dcip_to_name(mem_ctx, domain, &ss, saf_name )) {
1347 fstrcpy( domain->dcname, saf_name );
1348 } else {
1349 winbind_add_failed_connection_entry(
1350 domain, saf_servername,
1351 NT_STATUS_UNSUCCESSFUL);
1352 }
1353 } else {
1354 fstrcpy( domain->dcname, saf_servername );
1355 }
1356
1357 SAFE_FREE( saf_servername );
1358 }
1359
1360 for (retries = 0; retries < 3; retries++) {
1361 int fd = -1;
1362 bool retry = False;
1363
1364 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1365
1366 DEBUG(10,("cm_open_connection: dcname is '%s' for domain %s\n",
1367 domain->dcname, domain->name ));
1368
1369 if (*domain->dcname
1370 && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, domain->dcname))
1371 && (resolve_name(domain->dcname, &domain->dcaddr, 0x20)))
1372 {
1373 struct sockaddr_storage *addrs = NULL;
1374 int num_addrs = 0;
1375 int dummy = 0;
1376
1377 if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 445, &addrs, &num_addrs)) {
1378 set_domain_offline(domain);
1379 talloc_destroy(mem_ctx);
1380 return NT_STATUS_NO_MEMORY;
1381 }
1382 if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 139, &addrs, &num_addrs)) {
1383 set_domain_offline(domain);
1384 talloc_destroy(mem_ctx);
1385 return NT_STATUS_NO_MEMORY;
1386 }
1387
1388 /* 5 second timeout. */
1389 if (!open_any_socket_out(addrs, num_addrs, 5000, &dummy, &fd)) {
1390 fd = -1;
1391 }
1392 }
1393
1394 if ((fd == -1)
1395 && !find_new_dc(mem_ctx, domain, domain->dcname, &domain->dcaddr, &fd))
1396 {
1397 /* This is the one place where we will
1398 set the global winbindd offline state
1399 to true, if a "WINBINDD_OFFLINE" entry
1400 is found in the winbindd cache. */
1401 set_global_winbindd_state_offline();
1402 break;
1403 }
1404
1405 new_conn->cli = NULL;
1406
1407 result = cm_prepare_connection(domain, fd, domain->dcname,
1408 &new_conn->cli, &retry);
1409
1410 if (!retry)
1411 break;
1412 }
1413
1414 if (NT_STATUS_IS_OK(result)) {
1415
1416 winbindd_set_locator_kdc_envs(domain);
1417
1418 if (domain->online == False) {
1419 /* We're changing state from offline to online. */
1420 set_global_winbindd_state_online();
1421 }
1422 set_domain_online(domain);
1423 } else {
1424 /* Ensure we setup the retry handler. */
1425 set_domain_offline(domain);
1426 }
1427
1428 talloc_destroy(mem_ctx);
1429 return result;
1430 }
1431
1432 /* Close down all open pipes on a connection. */
1433
1434 void invalidate_cm_connection(struct winbindd_cm_conn *conn)
1435 {
1436 /* We're closing down a possibly dead
1437 connection. Don't have impossibly long (10s) timeouts. */
1438
1439 if (conn->cli) {
1440 cli_set_timeout(conn->cli, 1000); /* 1 second. */
1441 }
1442
1443 if (conn->samr_pipe != NULL) {
1444 if (!cli_rpc_pipe_close(conn->samr_pipe)) {
1445 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1446 if (conn->cli) {
1447 cli_set_timeout(conn->cli, 500);
1448 }
1449 }
1450 conn->samr_pipe = NULL;
1451 }
1452
1453 if (conn->lsa_pipe != NULL) {
1454 if (!cli_rpc_pipe_close(conn->lsa_pipe)) {
1455 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1456 if (conn->cli) {
1457 cli_set_timeout(conn->cli, 500);
1458 }
1459 }
1460 conn->lsa_pipe = NULL;
1461 }
1462
1463 if (conn->netlogon_pipe != NULL) {
1464 if (!cli_rpc_pipe_close(conn->netlogon_pipe)) {
1465 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1466 if (conn->cli) {
1467 cli_set_timeout(conn->cli, 500);
1468 }
1469 }
1470 conn->netlogon_pipe = NULL;
1471 }
1472
1473 if (conn->cli) {
1474 cli_shutdown(conn->cli);
1475 }
1476
1477 conn->cli = NULL;
1478 }
1479
1480 void close_conns_after_fork(void)
1481 {
1482 struct winbindd_domain *domain;
1483
1484 for (domain = domain_list(); domain; domain = domain->next) {
1485 if (domain->conn.cli == NULL)
1486 continue;
1487
1488 if (domain->conn.cli->fd == -1)
1489 continue;
1490
1491 close(domain->conn.cli->fd);
1492 domain->conn.cli->fd = -1;
1493 }
1494 }
1495
1496 static bool connection_ok(struct winbindd_domain *domain)
1497 {
1498 if (domain->conn.cli == NULL) {
1499 DEBUG(8, ("connection_ok: Connection to %s for domain %s has NULL "
1500 "cli!\n", domain->dcname, domain->name));
1501 return False;
1502 }
1503
1504 if (!domain->conn.cli->initialised) {
1505 DEBUG(3, ("connection_ok: Connection to %s for domain %s was never "
1506 "initialised!\n", domain->dcname, domain->name));
1507 return False;
1508 }
1509
1510 if (domain->conn.cli->fd == -1) {
1511 DEBUG(3, ("connection_ok: Connection to %s for domain %s has died or was "
1512 "never started (fd == -1)\n",
1513 domain->dcname, domain->name));
1514 return False;
1515 }
1516
1517 if (domain->online == False) {
1518 DEBUG(3, ("connection_ok: Domain %s is offline\n", domain->name));
1519 return False;
1520 }
1521
1522 return True;
1523 }
1524
1525 /* Initialize a new connection up to the RPC BIND.
1526 Bypass online status check so always does network calls. */
1527
1528 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain)
1529 {
1530 NTSTATUS result;
1531
1532 /* Internal connections never use the network. */
1533 if (domain->internal) {
1534 domain->initialized = True;
1535 return NT_STATUS_OK;
1536 }
1537
1538 if (connection_ok(domain)) {
1539 if (!domain->initialized) {
1540 set_dc_type_and_flags(domain);
1541 }
1542 return NT_STATUS_OK;
1543 }
1544
1545 invalidate_cm_connection(&domain->conn);
1546
1547 result = cm_open_connection(domain, &domain->conn);
1548
1549 if (NT_STATUS_IS_OK(result) && !domain->initialized) {
1550 set_dc_type_and_flags(domain);
1551 }
1552
1553 return result;
1554 }
1555
1556 NTSTATUS init_dc_connection(struct winbindd_domain *domain)
1557 {
1558 if (domain->initialized && !domain->online) {
1559 /* We check for online status elsewhere. */
1560 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1561 }
1562
1563 return init_dc_connection_network(domain);
1564 }
1565
1566 /******************************************************************************
1567 Set the trust flags (direction and forest location) for a domain
1568 ******************************************************************************/
1569
1570 static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain )
1571 {
1572 struct winbindd_domain *our_domain;
1573 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1574 struct netr_DomainTrustList trusts;
1575 int i;
1576 uint32 flags = (NETR_TRUST_FLAG_IN_FOREST |
1577 NETR_TRUST_FLAG_OUTBOUND |
1578 NETR_TRUST_FLAG_INBOUND);
1579 struct rpc_pipe_client *cli;
1580 TALLOC_CTX *mem_ctx = NULL;
1581
1582 DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s\n", domain->name ));
1583
1584 /* Our primary domain doesn't need to worry about trust flags.
1585 Force it to go through the network setup */
1586 if ( domain->primary ) {
1587 return False;
1588 }
1589
1590 our_domain = find_our_domain();
1591
1592 if ( !connection_ok(our_domain) ) {
1593 DEBUG(3,("set_dc_type_and_flags_trustinfo: No connection to our domain!\n"));
1594 return False;
1595 }
1596
1597 /* This won't work unless our domain is AD */
1598
1599 if ( !our_domain->active_directory ) {
1600 return False;
1601 }
1602
1603 /* Use DsEnumerateDomainTrusts to get us the trust direction
1604 and type */
1605
1606 result = cm_connect_netlogon(our_domain, &cli);
1607
1608 if (!NT_STATUS_IS_OK(result)) {
1609 DEBUG(5, ("set_dc_type_and_flags_trustinfo: Could not open "
1610 "a connection to %s for PIPE_NETLOGON (%s)\n",
1611 domain->name, nt_errstr(result)));
1612 return False;
1613 }
1614
1615 if ( (mem_ctx = talloc_init("set_dc_type_and_flags_trustinfo")) == NULL ) {
1616 DEBUG(0,("set_dc_type_and_flags_trustinfo: talloc_init() failed!\n"));
1617 return False;
1618 }
1619
1620 result = rpccli_netr_DsrEnumerateDomainTrusts(cli, mem_ctx,
1621 cli->cli->desthost,
1622 flags,
1623 &trusts,
1624 NULL);
1625 if (!NT_STATUS_IS_OK(result)) {
1626 DEBUG(0,("set_dc_type_and_flags_trustinfo: "
1627 "failed to query trusted domain list: %s\n",
1628 nt_errstr(result)));
1629 talloc_destroy(mem_ctx);
1630 return false;
1631 }
1632
1633 /* Now find the domain name and get the flags */
1634
1635 for ( i=0; i<trusts.count; i++ ) {
1636 if ( strequal( domain->name, trusts.array[i].netbios_name) ) {
1637 domain->domain_flags = trusts.array[i].trust_flags;
1638 domain->domain_type = trusts.array[i].trust_type;
1639 domain->domain_trust_attribs = trusts.array[i].trust_attributes;
1640
1641 if ( domain->domain_type == NETR_TRUST_TYPE_UPLEVEL )
1642 domain->active_directory = True;
1643
1644 /* This flag is only set if the domain is *our*
1645 primary domain and the primary domain is in
1646 native mode */
1647
1648 domain->native_mode = (domain->domain_flags & NETR_TRUST_FLAG_NATIVE);
1649
1650 DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s is %sin "
1651 "native mode.\n", domain->name,
1652 domain->native_mode ? "" : "NOT "));
1653
1654 DEBUG(5,("set_dc_type_and_flags_trustinfo: domain %s is %s"
1655 "running active directory.\n", domain->name,
1656 domain->active_directory ? "" : "NOT "));
1657
1658
1659 domain->initialized = True;
1660
1661 if ( !winbindd_can_contact_domain( domain) )
1662 domain->internal = True;
1663
1664 break;
1665 }
1666 }
1667
1668 talloc_destroy( mem_ctx );
1669
1670 return domain->initialized;
1671 }
1672
1673 /******************************************************************************
1674 We can 'sense' certain things about the DC by it's replies to certain
1675 questions.
1676
1677 This tells us if this particular remote server is Active Directory, and if it
1678 is native mode.
1679 ******************************************************************************/
1680
1681 static void set_dc_type_and_flags_connect( struct winbindd_domain *domain )
1682 {
1683 NTSTATUS result;
1684 WERROR werr;
1685 TALLOC_CTX *mem_ctx = NULL;
1686 struct rpc_pipe_client *cli;
1687 POLICY_HND pol;
1688 union dssetup_DsRoleInfo info;
1689 union lsa_PolicyInformation *lsa_info = NULL;
1690
1691 if (!connection_ok(domain)) {
1692 return;
1693 }
1694
1695 mem_ctx = talloc_init("set_dc_type_and_flags on domain %s\n",
1696 domain->name);
1697 if (!mem_ctx) {
1698 DEBUG(1, ("set_dc_type_and_flags_connect: talloc_init() failed\n"));
1699 return;
1700 }
1701
1702 DEBUG(5, ("set_dc_type_and_flags_connect: domain %s\n", domain->name ));
1703
1704 cli = cli_rpc_pipe_open_noauth(domain->conn.cli, PI_DSSETUP,
1705 &result);
1706
1707 if (cli == NULL) {
1708 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
1709 "PI_DSSETUP on domain %s: (%s)\n",
1710 domain->name, nt_errstr(result)));
1711
1712 /* if this is just a non-AD domain we need to continue
1713 * identifying so that we can in the end return with
1714 * domain->initialized = True - gd */
1715
1716 goto no_dssetup;
1717 }
1718
1719 result = rpccli_dssetup_DsRoleGetPrimaryDomainInformation(cli, mem_ctx,
1720 DS_ROLE_BASIC_INFORMATION,
1721 &info,
1722 &werr);
1723 cli_rpc_pipe_close(cli);
1724
1725 if (!NT_STATUS_IS_OK(result)) {
1726 DEBUG(5, ("set_dc_type_and_flags_connect: rpccli_ds_getprimarydominfo "
1727 "on domain %s failed: (%s)\n",
1728 domain->name, nt_errstr(result)));
1729
1730 /* older samba3 DCs will return DCERPC_FAULT_OP_RNG_ERROR for
1731 * every opcode on the DSSETUP pipe, continue with
1732 * no_dssetup mode here as well to get domain->initialized
1733 * set - gd */
1734
1735 if (NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR) {
1736 goto no_dssetup;
1737 }
1738
1739 TALLOC_FREE(mem_ctx);
1740 return;
1741 }
1742
1743 if ((info.basic.flags & DS_ROLE_PRIMARY_DS_RUNNING) &&
1744 !(info.basic.flags & DS_ROLE_PRIMARY_DS_MIXED_MODE)) {
1745 domain->native_mode = True;
1746 } else {
1747 domain->native_mode = False;
1748 }
1749
1750 no_dssetup:
1751 cli = cli_rpc_pipe_open_noauth(domain->conn.cli, PI_LSARPC, &result);
1752
1753 if (cli == NULL) {
1754 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
1755 "PI_LSARPC on domain %s: (%s)\n",
1756 domain->name, nt_errstr(result)));
1757 cli_rpc_pipe_close(cli);
1758 TALLOC_FREE(mem_ctx);
1759 return;
1760 }
1761
1762 result = rpccli_lsa_open_policy2(cli, mem_ctx, True,
1763 SEC_RIGHTS_MAXIMUM_ALLOWED, &pol);
1764
1765 if (NT_STATUS_IS_OK(result)) {
1766 /* This particular query is exactly what Win2k clients use
1767 to determine that the DC is active directory */
1768 result = rpccli_lsa_QueryInfoPolicy2(cli, mem_ctx,
1769 &pol,
1770 LSA_POLICY_INFO_DNS,
1771 &lsa_info);
1772 }
1773
1774 if (NT_STATUS_IS_OK(result)) {
1775 domain->active_directory = True;
1776
1777 if (lsa_info->dns.name.string) {
1778 fstrcpy(domain->name, lsa_info->dns.name.string);
1779 }
1780
1781 if (lsa_info->dns.dns_domain.string) {
1782 fstrcpy(domain->alt_name,
1783 lsa_info->dns.dns_domain.string);
1784 }
1785
1786 /* See if we can set some domain trust flags about
1787 ourself */
1788
1789 if (lsa_info->dns.dns_forest.string) {
1790 fstrcpy(domain->forest_name,
1791 lsa_info->dns.dns_forest.string);
1792
1793 if (strequal(domain->forest_name, domain->alt_name)) {
1794 domain->domain_flags |= NETR_TRUST_FLAG_TREEROOT;
1795 }
1796 }
1797
1798 if (lsa_info->dns.sid) {
1799 sid_copy(&domain->sid, lsa_info->dns.sid);
1800 }
1801 } else {
1802 domain->active_directory = False;
1803
1804 result = rpccli_lsa_open_policy(cli, mem_ctx, True,
1805 SEC_RIGHTS_MAXIMUM_ALLOWED,
1806 &pol);
1807
1808 if (!NT_STATUS_IS_OK(result)) {
1809 goto done;
1810 }
1811
1812 result = rpccli_lsa_QueryInfoPolicy(cli, mem_ctx,
1813 &pol,
1814 LSA_POLICY_INFO_ACCOUNT_DOMAIN,
1815 &lsa_info);
1816
1817 if (NT_STATUS_IS_OK(result)) {
1818
1819 if (lsa_info->account_domain.name.string) {
1820 fstrcpy(domain->name,
1821 lsa_info->account_domain.name.string);
1822 }
1823
1824 if (lsa_info->account_domain.sid) {
1825 sid_copy(&domain->sid, lsa_info->account_domain.sid);
1826 }
1827 }
1828 }
1829 done:
1830
1831 DEBUG(5, ("set_dc_type_and_flags_connect: domain %s is %sin native mode.\n",
1832 domain->name, domain->native_mode ? "" : "NOT "));
1833
1834 DEBUG(5,("set_dc_type_and_flags_connect: domain %s is %srunning active directory.\n",
1835 domain->name, domain->active_directory ? "" : "NOT "));
1836
1837 cli_rpc_pipe_close(cli);
1838
1839 TALLOC_FREE(mem_ctx);
1840
1841 domain->initialized = True;
1842 }
1843
1844 /**********************************************************************
1845 Set the domain_flags (trust attributes, domain operating modes, etc...
1846 ***********************************************************************/
1847
1848 static void set_dc_type_and_flags( struct winbindd_domain *domain )
1849 {
1850 /* we always have to contact our primary domain */
1851
1852 if ( domain->primary ) {
1853 DEBUG(10,("set_dc_type_and_flags: setting up flags for "
1854 "primary domain\n"));
1855 set_dc_type_and_flags_connect( domain );
1856 return;
1857 }
1858
1859 /* Use our DC to get the information if possible */
1860
1861 if ( !set_dc_type_and_flags_trustinfo( domain ) ) {
1862 /* Otherwise, fallback to contacting the
1863 domain directly */
1864 set_dc_type_and_flags_connect( domain );
1865 }
1866
1867 return;
1868 }
1869
1870
1871
1872 /**********************************************************************
1873 ***********************************************************************/
1874
1875 static bool cm_get_schannel_dcinfo(struct winbindd_domain *domain,
1876 struct dcinfo **ppdc)
1877 {
1878 NTSTATUS result;
1879 struct rpc_pipe_client *netlogon_pipe;
1880
1881 if (lp_client_schannel() == False) {
1882 return False;
1883 }
1884
1885 result = cm_connect_netlogon(domain, &netlogon_pipe);
1886 if (!NT_STATUS_IS_OK(result)) {
1887 return False;
1888 }
1889
1890 /* Return a pointer to the struct dcinfo from the
1891 netlogon pipe. */
1892
1893 *ppdc = domain->conn.netlogon_pipe->dc;
1894 return True;
1895 }
1896
1897 NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
1898 struct rpc_pipe_client **cli, POLICY_HND *sam_handle)
1899 {
1900 struct winbindd_cm_conn *conn;
1901 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1902 fstring conn_pwd;
1903 struct dcinfo *p_dcinfo;
1904 char *machine_password = NULL;
1905 char *machine_account = NULL;
1906 char *domain_name = NULL;
1907
1908 result = init_dc_connection(domain);
1909 if (!NT_STATUS_IS_OK(result)) {
1910 return result;
1911 }
1912
1913 conn = &domain->conn;
1914
1915 if (conn->samr_pipe != NULL) {
1916 goto done;
1917 }
1918
1919 /*
1920 * No SAMR pipe yet. Attempt to get an NTLMSSP SPNEGO authenticated
1921 * sign and sealed pipe using the machine account password by
1922 * preference. If we can't - try schannel, if that fails, try
1923 * anonymous.
1924 */
1925
1926 pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
1927 if ((conn->cli->user_name[0] == '\0') ||
1928 (conn->cli->domain[0] == '\0') ||
1929 (conn_pwd[0] == '\0'))
1930 {
1931 result = get_trust_creds(domain, &machine_password,
1932 &machine_account, NULL);
1933 if (!NT_STATUS_IS_OK(result)) {
1934 DEBUG(10, ("cm_connect_sam: No no user available for "
1935 "domain %s, trying schannel\n", conn->cli->domain));
1936 goto schannel;
1937 }
1938 domain_name = domain->name;
1939 } else {
1940 machine_password = SMB_STRDUP(conn_pwd);
1941 machine_account = SMB_STRDUP(conn->cli->user_name);
1942 domain_name = conn->cli->domain;
1943 }
1944
1945 if (!machine_password || !machine_account) {
1946 result = NT_STATUS_NO_MEMORY;
1947 goto done;
1948 }
1949
1950 /* We have an authenticated connection. Use a NTLMSSP SPNEGO
1951 authenticated SAMR pipe with sign & seal. */
1952 conn->samr_pipe =
1953 cli_rpc_pipe_open_spnego_ntlmssp(conn->cli, PI_SAMR,
1954 PIPE_AUTH_LEVEL_PRIVACY,
1955 domain_name,
1956 machine_account,
1957 machine_password, &result);
1958
1959 if (conn->samr_pipe == NULL) {
1960 DEBUG(10,("cm_connect_sam: failed to connect to SAMR "
1961 "pipe for domain %s using NTLMSSP "
1962 "authenticated pipe: user %s\\%s. Error was "
1963 "%s\n", domain->name, domain_name,
1964 machine_account, nt_errstr(result)));
1965 goto schannel;
1966 }
1967
1968 DEBUG(10,("cm_connect_sam: connected to SAMR pipe for "
1969 "domain %s using NTLMSSP authenticated "
1970 "pipe: user %s\\%s\n", domain->name,
1971 domain_name, machine_account));
1972
1973 result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
1974 conn->samr_pipe->cli->desthost,
1975 SEC_RIGHTS_MAXIMUM_ALLOWED,
1976 &conn->sam_connect_handle);
1977 if (NT_STATUS_IS_OK(result)) {
1978 goto open_domain;
1979 }
1980 DEBUG(10,("cm_connect_sam: ntlmssp-sealed rpccli_samr_Connect2 "
1981 "failed for domain %s, error was %s. Trying schannel\n",
1982 domain->name, nt_errstr(result) ));
1983 cli_rpc_pipe_close(conn->samr_pipe);
1984
1985 schannel:
1986
1987 /* Fall back to schannel if it's a W2K pre-SP1 box. */
1988
1989 if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
1990 /* If this call fails - conn->cli can now be NULL ! */
1991 DEBUG(10, ("cm_connect_sam: Could not get schannel auth info "
1992 "for domain %s, trying anon\n", domain->name));
1993 goto anonymous;
1994 }
1995 conn->samr_pipe = cli_rpc_pipe_open_schannel_with_key
1996 (conn->cli, PI_SAMR, PIPE_AUTH_LEVEL_PRIVACY,
1997 domain->name, p_dcinfo, &result);
1998
1999 if (conn->samr_pipe == NULL) {
2000 DEBUG(10,("cm_connect_sam: failed to connect to SAMR pipe for "
2001 "domain %s using schannel. Error was %s\n",
2002 domain->name, nt_errstr(result) ));
2003 goto anonymous;
2004 }
2005 DEBUG(10,("cm_connect_sam: connected to SAMR pipe for domain %s using "
2006 "schannel.\n", domain->name ));
2007
2008 result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
2009 conn->samr_pipe->cli->desthost,
2010 SEC_RIGHTS_MAXIMUM_ALLOWED,
2011 &conn->sam_connect_handle);
2012 if (NT_STATUS_IS_OK(result)) {
2013 goto open_domain;
2014 }
2015 DEBUG(10,("cm_connect_sam: schannel-sealed rpccli_samr_Connect2 failed "
2016 "for domain %s, error was %s. Trying anonymous\n",
2017 domain->name, nt_errstr(result) ));
2018 cli_rpc_pipe_close(conn->samr_pipe);
2019
2020 anonymous:
2021
2022 /* Finally fall back to anonymous. */
2023 conn->samr_pipe = cli_rpc_pipe_open_noauth(conn->cli, PI_SAMR,
2024 &result);
2025
2026 if (conn->samr_pipe == NULL) {
2027 result = NT_STATUS_PIPE_NOT_AVAILABLE;
2028 goto done;
2029 }
2030
2031 result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
2032 conn->samr_pipe->cli->desthost,
2033 SEC_RIGHTS_MAXIMUM_ALLOWED,
2034 &conn->sam_connect_handle);
2035 if (!NT_STATUS_IS_OK(result)) {
2036 DEBUG(10,("cm_connect_sam: rpccli_samr_Connect2 failed "
2037 "for domain %s Error was %s\n",
2038 domain->name, nt_errstr(result) ));
2039 goto done;
2040 }
2041
2042 open_domain:
2043 result = rpccli_samr_OpenDomain(conn->samr_pipe,
2044 mem_ctx,
2045 &conn->sam_connect_handle,
2046 SEC_RIGHTS_MAXIMUM_ALLOWED,
2047 &domain->sid,
2048 &conn->sam_domain_handle);
2049
2050 done:
2051
2052 if (!NT_STATUS_IS_OK(result)) {
2053 invalidate_cm_connection(conn);
2054 return result;
2055 }
2056
2057 *cli = conn->samr_pipe;
2058 *sam_handle = conn->sam_domain_handle;
2059 SAFE_FREE(machine_password);
2060 SAFE_FREE(machine_account);
2061 return result;
2062 }
2063
2064 NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
2065 struct rpc_pipe_client **cli, POLICY_HND *lsa_policy)
2066 {
2067 struct winbindd_cm_conn *conn;
2068 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2069 fstring conn_pwd;
2070 struct dcinfo *p_dcinfo;
2071
2072 result = init_dc_connection(domain);
2073 if (!NT_STATUS_IS_OK(result))
2074 return result;
2075
2076 conn = &domain->conn;
2077
2078 if (conn->lsa_pipe != NULL) {
2079 goto done;
2080 }
2081
2082 pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
2083 if ((conn->cli->user_name[0] == '\0') ||
2084 (conn->cli->domain[0] == '\0') ||
2085 (conn_pwd[0] == '\0')) {
2086 DEBUG(10, ("cm_connect_lsa: No no user available for "
2087 "domain %s, trying schannel\n", conn->cli->domain));
2088 goto schannel;
2089 }
2090
2091 /* We have an authenticated connection. Use a NTLMSSP SPNEGO
2092 * authenticated LSA pipe with sign & seal. */
2093 conn->lsa_pipe = cli_rpc_pipe_open_spnego_ntlmssp
2094 (conn->cli, PI_LSARPC, PIPE_AUTH_LEVEL_PRIVACY,
2095 conn->cli->domain, conn->cli->user_name, conn_pwd, &result);
2096
2097 if (conn->lsa_pipe == NULL) {
2098 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2099 "domain %s using NTLMSSP authenticated pipe: user "
2100 "%s\\%s. Error was %s. Trying schannel.\n",
2101 domain->name, conn->cli->domain,
2102 conn->cli->user_name, nt_errstr(result)));
2103 goto schannel;
2104 }
2105
2106 DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2107 "NTLMSSP authenticated pipe: user %s\\%s\n",
2108 domain->name, conn->cli->domain, conn->cli->user_name ));
2109
2110 result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2111 SEC_RIGHTS_MAXIMUM_ALLOWED,
2112 &conn->lsa_policy);
2113 if (NT_STATUS_IS_OK(result)) {
2114 goto done;
2115 }
2116
2117 DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2118 "schannel\n"));
2119
2120 cli_rpc_pipe_close(conn->lsa_pipe);
2121
2122 schannel:
2123
2124 /* Fall back to schannel if it's a W2K pre-SP1 box. */
2125
2126 if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
2127 /* If this call fails - conn->cli can now be NULL ! */
2128 DEBUG(10, ("cm_connect_lsa: Could not get schannel auth info "
2129 "for domain %s, trying anon\n", domain->name));
2130 goto anonymous;
2131 }
2132 conn->lsa_pipe = cli_rpc_pipe_open_schannel_with_key
2133 (conn->cli, PI_LSARPC, PIPE_AUTH_LEVEL_PRIVACY,
2134 domain->name, p_dcinfo, &result);
2135
2136 if (conn->lsa_pipe == NULL) {
2137 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2138 "domain %s using schannel. Error was %s\n",
2139 domain->name, nt_errstr(result) ));
2140 goto anonymous;
2141 }
2142 DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2143 "schannel.\n", domain->name ));
2144
2145 result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2146 SEC_RIGHTS_MAXIMUM_ALLOWED,
2147 &conn->lsa_policy);
2148 if (NT_STATUS_IS_OK(result)) {
2149 goto done;
2150 }
2151
2152 DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2153 "anonymous\n"));
2154
2155 cli_rpc_pipe_close(conn->lsa_pipe);
2156
2157 anonymous:
2158
2159 conn->lsa_pipe = cli_rpc_pipe_open_noauth(conn->cli, PI_LSARPC,
2160 &result);
2161 if (conn->lsa_pipe == NULL) {
2162 result = NT_STATUS_PIPE_NOT_AVAILABLE;
2163 goto done;
2164 }
2165
2166 result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2167 SEC_RIGHTS_MAXIMUM_ALLOWED,
2168 &conn->lsa_policy);
2169 done:
2170 if (!NT_STATUS_IS_OK(result)) {
2171 invalidate_cm_connection(conn);
2172 return result;
2173 }
2174
2175 *cli = conn->lsa_pipe;
2176 *lsa_policy = conn->lsa_policy;
2177 return result;
2178 }
2179
2180 /****************************************************************************
2181 Open the netlogon pipe to this DC. Use schannel if specified in client conf.
2182 session key stored in conn->netlogon_pipe->dc->sess_key.
2183 ****************************************************************************/
2184
2185 NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
2186 struct rpc_pipe_client **cli)
2187 {
2188 struct winbindd_cm_conn *conn;
2189 NTSTATUS result;
2190
2191 uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
2192 uint8 mach_pwd[16];
2193 uint32 sec_chan_type;
2194 const char *account_name;
2195 struct rpc_pipe_client *netlogon_pipe = NULL;
2196
2197 *cli = NULL;
2198
2199 result = init_dc_connection(domain);
2200 if (!NT_STATUS_IS_OK(result)) {
2201 return result;
2202 }
2203
2204 conn = &domain->conn;
2205
2206 if (conn->netlogon_pipe != NULL) {
2207 *cli = conn->netlogon_pipe;
2208 return NT_STATUS_OK;
2209 }
2210
2211 netlogon_pipe = cli_rpc_pipe_open_noauth(conn->cli, PI_NETLOGON,
2212 &result);
2213 if (netlogon_pipe == NULL) {
2214 return result;
2215 }
2216
2217 if ((!IS_DC) && (!domain->primary)) {
2218 /* Clear the schannel request bit and drop down */
2219 neg_flags &= ~NETLOGON_NEG_SCHANNEL;
2220 goto no_schannel;
2221 }
2222
2223 if (lp_client_schannel() != False) {
2224 neg_flags |= NETLOGON_NEG_SCHANNEL;
2225 }
2226
2227 if (!get_trust_pw_hash(domain->name, mach_pwd, &account_name,
2228 &sec_chan_type))
2229 {
2230 cli_rpc_pipe_close(netlogon_pipe);
2231 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
2232 }
2233
2234 result = rpccli_netlogon_setup_creds(
2235 netlogon_pipe,
2236 domain->dcname, /* server name. */
2237 domain->name, /* domain name */
2238 global_myname(), /* client name */
2239 account_name, /* machine account */
2240 mach_pwd, /* machine password */
2241 sec_chan_type, /* from get_trust_pw */
2242 &neg_flags);
2243
2244 if (!NT_STATUS_IS_OK(result)) {
2245 cli_rpc_pipe_close(netlogon_pipe);
2246 return result;
2247 }
2248
2249 if ((lp_client_schannel() == True) &&
2250 ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2251 DEBUG(3, ("Server did not offer schannel\n"));
2252 cli_rpc_pipe_close(netlogon_pipe);
2253 return NT_STATUS_ACCESS_DENIED;
2254 }
2255
2256 no_schannel:
2257 if ((lp_client_schannel() == False) ||
2258 ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2259 /*
2260 * NetSamLogonEx only works for schannel
2261 */
2262 domain->can_do_samlogon_ex = False;
2263
2264 /* We're done - just keep the existing connection to NETLOGON
2265 * open */
2266 conn->netlogon_pipe = netlogon_pipe;
2267 *cli = conn->netlogon_pipe;
2268 return NT_STATUS_OK;
2269 }
2270
2271 /* Using the credentials from the first pipe, open a signed and sealed
2272 second netlogon pipe. The session key is stored in the schannel
2273 part of the new pipe auth struct.
2274 */
2275
2276 conn->netlogon_pipe =
2277 cli_rpc_pipe_open_schannel_with_key(conn->cli,
2278 PI_NETLOGON,
2279 PIPE_AUTH_LEVEL_PRIVACY,
2280 domain->name,
2281 netlogon_pipe->dc,
2282 &result);
2283
2284 /* We can now close the initial netlogon pipe. */
2285 cli_rpc_pipe_close(netlogon_pipe);
2286
2287 if (conn->netlogon_pipe == NULL) {
2288 DEBUG(3, ("Could not open schannel'ed NETLOGON pipe. Error "
2289 "was %s\n", nt_errstr(result)));
2290
2291 /* make sure we return something besides OK */
2292 return !NT_STATUS_IS_OK(result) ? result : NT_STATUS_PIPE_NOT_AVAILABLE;
2293 }
2294
2295 /*
2296 * Try NetSamLogonEx for AD domains
2297 */
2298 domain->can_do_samlogon_ex = domain->active_directory;
2299
2300 *cli = conn->netlogon_pipe;
2301 return NT_STATUS_OK;
2302 }
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