Remove pwd_cache.c, it was doing nothing. Make user_name, domain, and
[ira/wip.git] / source3 / winbindd / winbindd_cm.c
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 parent_pid = sys_getpid();
175         char *lfile = NULL;
176
177         /* Stop zombies */
178         CatchChild();
179
180         if (domain->dc_probe_pid != (pid_t)-1) {
181                 /*
182                  * We might already have a DC probe
183                  * child working, check.
184                  */
185                 if (process_exists_by_pid(domain->dc_probe_pid)) {
186                         DEBUG(10,("fork_child_dc_connect: pid %u already "
187                                 "checking for DC's.\n",
188                                 (unsigned int)domain->dc_probe_pid));
189                         return true;
190                 }
191                 domain->dc_probe_pid = (pid_t)-1;
192         }
193
194         domain->dc_probe_pid = sys_fork();
195
196         if (domain->dc_probe_pid == (pid_t)-1) {
197                 DEBUG(0, ("fork_child_dc_connect: Could not fork: %s\n", strerror(errno)));
198                 return False;
199         }
200
201         if (domain->dc_probe_pid != (pid_t)0) {
202                 /* Parent */
203                 messaging_register(winbind_messaging_context(), NULL,
204                                    MSG_WINBIND_TRY_TO_GO_ONLINE,
205                                    msg_try_to_go_online);
206                 messaging_register(winbind_messaging_context(), NULL,
207                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
208                                    msg_failed_to_go_online);
209                 return True;
210         }
211
212         /* Child. */
213
214         /* Leave messages blocked - we will never process one. */
215
216         if (!override_logfile) {
217                 if (asprintf(&lfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) == -1) {
218                         DEBUG(0, ("fork_child_dc_connect: out of memory.\n"));
219                         _exit(1);
220                 }
221         }
222
223         if (!winbindd_reinit_after_fork(lfile)) {
224                 messaging_send_buf(winbind_messaging_context(),
225                                    pid_to_procid(parent_pid),
226                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
227                                    (uint8 *)domain->name,
228                                    strlen(domain->name)+1);
229                 _exit(1);
230         }
231         SAFE_FREE(lfile);
232
233         mem_ctx = talloc_init("fork_child_dc_connect");
234         if (!mem_ctx) {
235                 DEBUG(0,("talloc_init failed.\n"));
236                 messaging_send_buf(winbind_messaging_context(),
237                                    pid_to_procid(parent_pid),
238                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
239                                    (uint8 *)domain->name,
240                                    strlen(domain->name)+1);
241                 _exit(1);
242         }
243
244         if ((!get_dcs(mem_ctx, domain, &dcs, &num_dcs)) || (num_dcs == 0)) {
245                 /* Still offline ? Can't find DC's. */
246                 messaging_send_buf(winbind_messaging_context(),
247                                    pid_to_procid(parent_pid),
248                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
249                                    (uint8 *)domain->name,
250                                    strlen(domain->name)+1);
251                 _exit(0);
252         }
253
254         /* We got a DC. Send a message to our parent to get it to
255            try and do the same. */
256
257         messaging_send_buf(winbind_messaging_context(),
258                            pid_to_procid(parent_pid),
259                            MSG_WINBIND_TRY_TO_GO_ONLINE,
260                            (uint8 *)domain->name,
261                            strlen(domain->name)+1);
262         _exit(0);
263 }
264
265 /****************************************************************
266  Handler triggered if we're offline to try and detect a DC.
267 ****************************************************************/
268
269 static void check_domain_online_handler(struct event_context *ctx,
270                                         struct timed_event *te,
271                                         struct timeval now,
272                                         void *private_data)
273 {
274         struct winbindd_domain *domain =
275                 (struct winbindd_domain *)private_data;
276
277         DEBUG(10,("check_domain_online_handler: called for domain "
278                   "%s (online = %s)\n", domain->name, 
279                   domain->online ? "True" : "False" ));
280
281         TALLOC_FREE(domain->check_online_event);
282
283         /* Are we still in "startup" mode ? */
284
285         if (domain->startup && (now.tv_sec > domain->startup_time + 30)) {
286                 /* No longer in "startup" mode. */
287                 DEBUG(10,("check_domain_online_handler: domain %s no longer in 'startup' mode.\n",
288                         domain->name ));
289                 domain->startup = False;
290         }
291
292         /* We've been told to stay offline, so stay
293            that way. */
294
295         if (get_global_winbindd_state_offline()) {
296                 DEBUG(10,("check_domain_online_handler: domain %s remaining globally offline\n",
297                         domain->name ));
298                 return;
299         }
300
301         /* Fork a child to test if it can contact a DC. 
302            If it can then send ourselves a message to
303            cause a reconnect. */
304
305         fork_child_dc_connect(domain);
306 }
307
308 /****************************************************************
309  If we're still offline setup the timeout check.
310 ****************************************************************/
311
312 static void calc_new_online_timeout_check(struct winbindd_domain *domain)
313 {
314         int wbr = lp_winbind_reconnect_delay();
315
316         if (domain->startup) {
317                 domain->check_online_timeout = 10;
318         } else if (domain->check_online_timeout < wbr) {
319                 domain->check_online_timeout = wbr;
320         }
321 }
322
323 /****************************************************************
324  Set domain offline and also add handler to put us back online
325  if we detect a DC.
326 ****************************************************************/
327
328 void set_domain_offline(struct winbindd_domain *domain)
329 {
330         DEBUG(10,("set_domain_offline: called for domain %s\n",
331                 domain->name ));
332
333         TALLOC_FREE(domain->check_online_event);
334
335         if (domain->internal) {
336                 DEBUG(3,("set_domain_offline: domain %s is internal - logic error.\n",
337                         domain->name ));
338                 return;
339         }
340
341         domain->online = False;
342
343         /* Offline domains are always initialized. They're
344            re-initialized when they go back online. */
345
346         domain->initialized = True;
347
348         /* We only add the timeout handler that checks and
349            allows us to go back online when we've not
350            been told to remain offline. */
351
352         if (get_global_winbindd_state_offline()) {
353                 DEBUG(10,("set_domain_offline: domain %s remaining globally offline\n",
354                         domain->name ));
355                 return;
356         }
357
358         /* If we're in statup mode, check again in 10 seconds, not in
359            lp_winbind_reconnect_delay() seconds (which is 30 seconds by default). */
360
361         calc_new_online_timeout_check(domain);
362
363         domain->check_online_event = event_add_timed(winbind_event_context(),
364                                                 NULL,
365                                                 timeval_current_ofs(domain->check_online_timeout,0),
366                                                 check_domain_online_handler,
367                                                 domain);
368
369         /* The above *has* to succeed for winbindd to work. */
370         if (!domain->check_online_event) {
371                 smb_panic("set_domain_offline: failed to add online handler");
372         }
373
374         DEBUG(10,("set_domain_offline: added event handler for domain %s\n",
375                 domain->name ));
376
377         /* Send an offline message to the idmap child when our
378            primary domain goes offline */
379
380         if ( domain->primary ) {
381                 struct winbindd_child *idmap = idmap_child();
382
383                 if ( idmap->pid != 0 ) {
384                         messaging_send_buf(winbind_messaging_context(),
385                                            pid_to_procid(idmap->pid), 
386                                            MSG_WINBIND_OFFLINE, 
387                                            (uint8 *)domain->name, 
388                                            strlen(domain->name)+1);
389                 }                       
390         }
391
392         return; 
393 }
394
395 /****************************************************************
396  Set domain online - if allowed.
397 ****************************************************************/
398
399 static void set_domain_online(struct winbindd_domain *domain)
400 {
401         DEBUG(10,("set_domain_online: called for domain %s\n",
402                 domain->name ));
403
404         if (domain->internal) {
405                 DEBUG(3,("set_domain_online: domain %s is internal - logic error.\n",
406                         domain->name ));
407                 return;
408         }
409
410         if (get_global_winbindd_state_offline()) {
411                 DEBUG(10,("set_domain_online: domain %s remaining globally offline\n",
412                         domain->name ));
413                 return;
414         }
415
416         winbindd_set_locator_kdc_envs(domain);
417
418         /* If we are waiting to get a krb5 ticket, trigger immediately. */
419         ccache_regain_all_now();
420
421         /* Ok, we're out of any startup mode now... */
422         domain->startup = False;
423
424         if (domain->online == False) {
425                 /* We were offline - now we're online. We default to
426                    using the MS-RPC backend if we started offline,
427                    and if we're going online for the first time we
428                    should really re-initialize the backends and the
429                    checks to see if we're talking to an AD or NT domain.
430                 */
431
432                 domain->initialized = False;
433
434                 /* 'reconnect_methods' is the MS-RPC backend. */
435                 if (domain->backend == &reconnect_methods) {
436                         domain->backend = NULL;
437                 }
438         }
439
440         /* Ensure we have no online timeout checks. */
441         domain->check_online_timeout = 0;
442         TALLOC_FREE(domain->check_online_event);
443
444         /* Ensure we ignore any pending child messages. */
445         messaging_deregister(winbind_messaging_context(),
446                              MSG_WINBIND_TRY_TO_GO_ONLINE, NULL);
447         messaging_deregister(winbind_messaging_context(),
448                              MSG_WINBIND_FAILED_TO_GO_ONLINE, NULL);
449
450         domain->online = True;
451
452         /* Send an online message to the idmap child when our
453            primary domain comes online */
454
455         if ( domain->primary ) {
456                 struct winbindd_child *idmap = idmap_child();
457
458                 if ( idmap->pid != 0 ) {
459                         messaging_send_buf(winbind_messaging_context(),
460                                            pid_to_procid(idmap->pid), 
461                                            MSG_WINBIND_ONLINE, 
462                                            (uint8 *)domain->name, 
463                                            strlen(domain->name)+1);
464                 }                       
465         }
466
467         return; 
468 }
469
470 /****************************************************************
471  Requested to set a domain online.
472 ****************************************************************/
473
474 void set_domain_online_request(struct winbindd_domain *domain)
475 {
476         struct timeval tev;
477
478         DEBUG(10,("set_domain_online_request: called for domain %s\n",
479                 domain->name ));
480
481         if (get_global_winbindd_state_offline()) {
482                 DEBUG(10,("set_domain_online_request: domain %s remaining globally offline\n",
483                         domain->name ));
484                 return;
485         }
486
487         /* We've been told it's safe to go online and
488            try and connect to a DC. But I don't believe it
489            because network manager seems to lie.
490            Wait at least 5 seconds. Heuristics suck... */
491
492
493         GetTimeOfDay(&tev);
494
495         /* Go into "startup" mode again. */
496         domain->startup_time = tev.tv_sec;
497         domain->startup = True;
498
499         tev.tv_sec += 5;
500
501         if (!domain->check_online_event) {
502                 /* If we've come from being globally offline we
503                    don't have a check online event handler set.
504                    We need to add one now we're trying to go
505                    back online. */
506
507                 DEBUG(10,("set_domain_online_request: domain %s was globally offline.\n",
508                         domain->name ));
509         }
510
511         TALLOC_FREE(domain->check_online_event);
512
513         domain->check_online_event = event_add_timed(winbind_event_context(),
514                                                      NULL,
515                                                      tev,
516                                                      check_domain_online_handler,
517                                                      domain);
518
519         /* The above *has* to succeed for winbindd to work. */
520         if (!domain->check_online_event) {
521                 smb_panic("set_domain_online_request: failed to add online handler");
522         }
523 }
524
525 /****************************************************************
526  Add -ve connection cache entries for domain and realm.
527 ****************************************************************/
528
529 void winbind_add_failed_connection_entry(const struct winbindd_domain *domain,
530                                         const char *server,
531                                         NTSTATUS result)
532 {
533         add_failed_connection_entry(domain->name, server, result);
534         /* If this was the saf name for the last thing we talked to,
535            remove it. */
536         saf_delete(domain->name);
537         if (*domain->alt_name) {
538                 add_failed_connection_entry(domain->alt_name, server, result);
539                 saf_delete(domain->alt_name);
540         }
541         winbindd_unset_locator_kdc_env(domain);
542 }
543
544 /* Choose between anonymous or authenticated connections.  We need to use
545    an authenticated connection if DCs have the RestrictAnonymous registry
546    entry set > 0, or the "Additional restrictions for anonymous
547    connections" set in the win2k Local Security Policy. 
548
549    Caller to free() result in domain, username, password
550 */
551
552 static void cm_get_ipc_userpass(char **username, char **domain, char **password)
553 {
554         *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
555         *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
556         *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
557
558         if (*username && **username) {
559
560                 if (!*domain || !**domain)
561                         *domain = smb_xstrdup(lp_workgroup());
562
563                 if (!*password || !**password)
564                         *password = smb_xstrdup("");
565
566                 DEBUG(3, ("cm_get_ipc_userpass: Retrieved auth-user from secrets.tdb [%s\\%s]\n", 
567                           *domain, *username));
568
569         } else {
570                 DEBUG(3, ("cm_get_ipc_userpass: No auth-user defined\n"));
571                 *username = smb_xstrdup("");
572                 *domain = smb_xstrdup("");
573                 *password = smb_xstrdup("");
574         }
575 }
576
577 static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
578                                      fstring dcname,
579                                      struct sockaddr_storage *dc_ss)
580 {
581         struct winbindd_domain *our_domain = NULL;
582         struct rpc_pipe_client *netlogon_pipe = NULL;
583         NTSTATUS result;
584         WERROR werr;
585         TALLOC_CTX *mem_ctx;
586         unsigned int orig_timeout;
587         const char *tmp = NULL;
588         const char *p;
589
590         /* Hmmmm. We can only open one connection to the NETLOGON pipe at the
591          * moment.... */
592
593         if (IS_DC) {
594                 return False;
595         }
596
597         if (domain->primary) {
598                 return False;
599         }
600
601         our_domain = find_our_domain();
602
603         if ((mem_ctx = talloc_init("get_dc_name_via_netlogon")) == NULL) {
604                 return False;
605         }
606
607         result = cm_connect_netlogon(our_domain, &netlogon_pipe);
608         if (!NT_STATUS_IS_OK(result)) {
609                 talloc_destroy(mem_ctx);
610                 return False;
611         }
612
613         /* This call can take a long time - allow the server to time out.
614            35 seconds should do it. */
615
616         orig_timeout = rpccli_set_timeout(netlogon_pipe, 35000);
617
618         if (our_domain->active_directory) {
619                 struct netr_DsRGetDCNameInfo *domain_info = NULL;
620
621                 result = rpccli_netr_DsRGetDCName(netlogon_pipe,
622                                                   mem_ctx,
623                                                   our_domain->dcname,
624                                                   domain->name,
625                                                   NULL,
626                                                   NULL,
627                                                   DS_RETURN_DNS_NAME,
628                                                   &domain_info,
629                                                   &werr);
630                 if (NT_STATUS_IS_OK(result) && W_ERROR_IS_OK(werr)) {
631                         tmp = talloc_strdup(
632                                 mem_ctx, domain_info->dc_unc);
633                         if (tmp == NULL) {
634                                 DEBUG(0, ("talloc_strdup failed\n"));
635                                 talloc_destroy(mem_ctx);
636                                 return false;
637                         }
638                         if (strlen(domain->alt_name) == 0) {
639                                 fstrcpy(domain->alt_name,
640                                         domain_info->domain_name);
641                         }
642                         if (strlen(domain->forest_name) == 0) {
643                                 fstrcpy(domain->forest_name,
644                                         domain_info->forest_name);
645                         }
646                 }
647         } else {
648                 result = rpccli_netr_GetAnyDCName(netlogon_pipe, mem_ctx,
649                                                   our_domain->dcname,
650                                                   domain->name,
651                                                   &tmp,
652                                                   &werr);
653         }
654
655         /* And restore our original timeout. */
656         rpccli_set_timeout(netlogon_pipe, orig_timeout);
657
658         if (!NT_STATUS_IS_OK(result)) {
659                 DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
660                         nt_errstr(result)));
661                 talloc_destroy(mem_ctx);
662                 return false;
663         }
664
665         if (!W_ERROR_IS_OK(werr)) {
666                 DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
667                            win_errstr(werr)));
668                 talloc_destroy(mem_ctx);
669                 return false;
670         }
671
672         /* rpccli_netr_GetAnyDCName gives us a name with \\ */
673         p = strip_hostname(tmp);
674
675         fstrcpy(dcname, p);
676
677         talloc_destroy(mem_ctx);
678
679         DEBUG(10,("rpccli_netr_GetAnyDCName returned %s\n", dcname));
680
681         if (!resolve_name(dcname, dc_ss, 0x20)) {
682                 return False;
683         }
684
685         return True;
686 }
687
688 /**
689  * Helper function to assemble trust password and account name
690  */
691 static NTSTATUS get_trust_creds(const struct winbindd_domain *domain,
692                                 char **machine_password,
693                                 char **machine_account,
694                                 char **machine_krb5_principal)
695 {
696         const char *account_name;
697         const char *name = NULL;
698
699         /* If we are a DC and this is not our own domain */
700
701         if (IS_DC) {
702                 name = domain->name;
703         } else {
704                 struct winbindd_domain *our_domain = find_our_domain();
705
706                 if (!our_domain)
707                         return NT_STATUS_INVALID_SERVER_STATE;          
708
709                 name = our_domain->name;                
710         }       
711
712         if (!get_trust_pw_clear(name, machine_password,
713                                 &account_name, NULL))
714         {
715                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
716         }
717
718         if ((machine_account != NULL) &&
719             (asprintf(machine_account, "%s$", account_name) == -1))
720         {
721                 return NT_STATUS_NO_MEMORY;
722         }
723
724         /* For now assume our machine account only exists in our domain */
725
726         if (machine_krb5_principal != NULL)
727         {
728                 struct winbindd_domain *our_domain = find_our_domain();
729
730                 if (!our_domain) {
731                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;                       
732                 }
733
734                 if (asprintf(machine_krb5_principal, "%s$@%s",
735                              account_name, our_domain->alt_name) == -1)
736                 {
737                         return NT_STATUS_NO_MEMORY;
738                 }
739
740                 strupper_m(*machine_krb5_principal);
741         }
742
743         return NT_STATUS_OK;
744 }
745
746 /************************************************************************
747  Given a fd with a just-connected TCP connection to a DC, open a connection
748  to the pipe.
749 ************************************************************************/
750
751 static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
752                                       const int sockfd,
753                                       const char *controller,
754                                       struct cli_state **cli,
755                                       bool *retry)
756 {
757         char *machine_password = NULL;
758         char *machine_krb5_principal = NULL;
759         char *machine_account = NULL;
760         char *ipc_username = NULL;
761         char *ipc_domain = NULL;
762         char *ipc_password = NULL;
763
764         struct named_mutex *mutex;
765
766         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
767
768         struct sockaddr peeraddr;
769         socklen_t peeraddr_len;
770
771         struct sockaddr_in *peeraddr_in = (struct sockaddr_in *)&peeraddr;
772
773         DEBUG(10,("cm_prepare_connection: connecting to DC %s for domain %s\n",
774                 controller, domain->name ));
775
776         *retry = True;
777
778         mutex = grab_named_mutex(talloc_tos(), controller,
779                                  WINBIND_SERVER_MUTEX_WAIT_TIME);
780         if (mutex == NULL) {
781                 DEBUG(0,("cm_prepare_connection: mutex grab failed for %s\n",
782                          controller));
783                 result = NT_STATUS_POSSIBLE_DEADLOCK;
784                 goto done;
785         }
786
787         if ((*cli = cli_initialise()) == NULL) {
788                 DEBUG(1, ("Could not cli_initialize\n"));
789                 result = NT_STATUS_NO_MEMORY;
790                 goto done;
791         }
792
793         (*cli)->timeout = 10000;        /* 10 seconds */
794         (*cli)->fd = sockfd;
795         fstrcpy((*cli)->desthost, controller);
796         (*cli)->use_kerberos = True;
797
798         peeraddr_len = sizeof(peeraddr);
799
800         if ((getpeername((*cli)->fd, &peeraddr, &peeraddr_len) != 0) ||
801             (peeraddr_len != sizeof(struct sockaddr_in)) ||
802             (peeraddr_in->sin_family != PF_INET))
803         {
804                 DEBUG(0,("cm_prepare_connection: %s\n", strerror(errno)));
805                 result = NT_STATUS_UNSUCCESSFUL;
806                 goto done;
807         }
808
809         if (ntohs(peeraddr_in->sin_port) == 139) {
810                 struct nmb_name calling;
811                 struct nmb_name called;
812
813                 make_nmb_name(&calling, global_myname(), 0x0);
814                 make_nmb_name(&called, "*SMBSERVER", 0x20);
815
816                 if (!cli_session_request(*cli, &calling, &called)) {
817                         DEBUG(8, ("cli_session_request failed for %s\n",
818                                   controller));
819                         result = NT_STATUS_UNSUCCESSFUL;
820                         goto done;
821                 }
822         }
823
824         result = cli_negprot(*cli);
825
826         if (!NT_STATUS_IS_OK(result)) {
827                 DEBUG(1, ("cli_negprot failed: %s\n", nt_errstr(result)));
828                 goto done;
829         }
830
831         if (!is_dc_trusted_domain_situation(domain->name) &&
832             (*cli)->protocol >= PROTOCOL_NT1 &&
833             (*cli)->capabilities & CAP_EXTENDED_SECURITY)
834         {
835                 ADS_STATUS ads_status;
836
837                 result = get_trust_creds(domain, &machine_password,
838                                          &machine_account,
839                                          &machine_krb5_principal);
840                 if (!NT_STATUS_IS_OK(result)) {
841                         goto anon_fallback;
842                 }
843
844                 if (lp_security() == SEC_ADS) {
845
846                         /* Try a krb5 session */
847
848                         (*cli)->use_kerberos = True;
849                         DEBUG(5, ("connecting to %s from %s with kerberos principal "
850                                   "[%s] and realm [%s]\n", controller, global_myname(),
851                                   machine_krb5_principal, domain->alt_name));
852
853                         winbindd_set_locator_kdc_envs(domain);
854
855                         ads_status = cli_session_setup_spnego(*cli,
856                                                               machine_krb5_principal, 
857                                                               machine_password,
858                                                               lp_workgroup(),
859                                                               domain->name);
860
861                         if (!ADS_ERR_OK(ads_status)) {
862                                 DEBUG(4,("failed kerberos session setup with %s\n",
863                                          ads_errstr(ads_status)));
864                         }
865
866                         result = ads_ntstatus(ads_status);
867                         if (NT_STATUS_IS_OK(result)) {
868                                 /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
869                                 result = cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
870                                 if (!NT_STATUS_IS_OK(result)) {
871                                         goto done;
872                                 }
873                                 goto session_setup_done;
874                         }
875                 }
876
877                 /* Fall back to non-kerberos session setup using NTLMSSP SPNEGO with the machine account. */
878                 (*cli)->use_kerberos = False;
879
880                 DEBUG(5, ("connecting to %s from %s with username "
881                           "[%s]\\[%s]\n",  controller, global_myname(),
882                           lp_workgroup(), machine_account));
883
884                 ads_status = cli_session_setup_spnego(*cli,
885                                                       machine_account, 
886                                                       machine_password, 
887                                                       lp_workgroup(),
888                                                       NULL);
889                 if (!ADS_ERR_OK(ads_status)) {
890                         DEBUG(4, ("authenticated session setup failed with %s\n",
891                                 ads_errstr(ads_status)));
892                 }
893
894                 result = ads_ntstatus(ads_status);
895                 if (NT_STATUS_IS_OK(result)) {
896                         /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
897                         result = cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
898                         if (!NT_STATUS_IS_OK(result)) {
899                                 goto done;
900                         }
901                         goto session_setup_done;
902                 }
903         }
904
905         /* Fall back to non-kerberos session setup with auth_user */
906
907         (*cli)->use_kerberos = False;
908
909         cm_get_ipc_userpass(&ipc_username, &ipc_domain, &ipc_password);
910
911         if ((((*cli)->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) != 0) &&
912             (strlen(ipc_username) > 0)) {
913
914                 /* Only try authenticated if we have a username */
915
916                 DEBUG(5, ("connecting to %s from %s with username "
917                           "[%s]\\[%s]\n",  controller, global_myname(),
918                           ipc_domain, ipc_username));
919
920                 if (NT_STATUS_IS_OK(cli_session_setup(
921                                             *cli, ipc_username,
922                                             ipc_password, strlen(ipc_password)+1,
923                                             ipc_password, strlen(ipc_password)+1,
924                                             ipc_domain))) {
925                         /* Successful logon with given username. */
926                         result = cli_init_creds(*cli, ipc_username, ipc_domain, ipc_password);
927                         if (!NT_STATUS_IS_OK(result)) {
928                                 goto done;
929                         }
930                         goto session_setup_done;
931                 } else {
932                         DEBUG(4, ("authenticated session setup with user %s\\%s failed.\n",
933                                 ipc_domain, ipc_username ));
934                 }
935         }
936
937  anon_fallback:
938
939         /* Fall back to anonymous connection, this might fail later */
940         DEBUG(10,("cm_prepare_connection: falling back to anonymous "
941                 "connection for DC %s\n",
942                 controller ));
943
944         if (NT_STATUS_IS_OK(cli_session_setup(*cli, "", NULL, 0,
945                                               NULL, 0, ""))) {
946                 DEBUG(5, ("Connected anonymously\n"));
947                 result = cli_init_creds(*cli, "", "", "");
948                 if (!NT_STATUS_IS_OK(result)) {
949                         goto done;
950                 }
951                 goto session_setup_done;
952         }
953
954         result = cli_nt_error(*cli);
955
956         if (NT_STATUS_IS_OK(result))
957                 result = NT_STATUS_UNSUCCESSFUL;
958
959         /* We can't session setup */
960
961         goto done;
962
963  session_setup_done:
964
965         /* cache the server name for later connections */
966
967         saf_store( domain->name, (*cli)->desthost );
968         if (domain->alt_name && (*cli)->use_kerberos) {
969                 saf_store( domain->alt_name, (*cli)->desthost );
970         }
971
972         winbindd_set_locator_kdc_envs(domain);
973
974         result = cli_tcon_andx(*cli, "IPC$", "IPC", "", 0);
975
976         if (!NT_STATUS_IS_OK(result)) {
977                 DEBUG(1,("failed tcon_X with %s\n", nt_errstr(result)));
978                 goto done;
979         }
980
981         TALLOC_FREE(mutex);
982         *retry = False;
983
984         /* set the domain if empty; needed for schannel connections */
985         if ( !(*cli)->domain[0] ) {
986                 result = cli_set_domain((*cli), domain->name);
987                 if (!NT_STATUS_IS_OK(result)) {
988                         return result;
989                 }
990         }
991
992         result = NT_STATUS_OK;
993
994  done:
995         TALLOC_FREE(mutex);
996         SAFE_FREE(machine_account);
997         SAFE_FREE(machine_password);
998         SAFE_FREE(machine_krb5_principal);
999         SAFE_FREE(ipc_username);
1000         SAFE_FREE(ipc_domain);
1001         SAFE_FREE(ipc_password);
1002
1003         if (!NT_STATUS_IS_OK(result)) {
1004                 winbind_add_failed_connection_entry(domain, controller, result);
1005                 if ((*cli) != NULL) {
1006                         cli_shutdown(*cli);
1007                         *cli = NULL;
1008                 }
1009         }
1010
1011         return result;
1012 }
1013
1014 /*******************************************************************
1015  Add a dcname and sockaddr_storage pair to the end of a dc_name_ip
1016  array.
1017
1018  Keeps the list unique by not adding duplicate entries.
1019
1020  @param[in] mem_ctx talloc memory context to allocate from
1021  @param[in] domain_name domain of the DC
1022  @param[in] dcname name of the DC to add to the list
1023  @param[in] pss Internet address and port pair to add to the list
1024  @param[in,out] dcs array of dc_name_ip structures to add to
1025  @param[in,out] num_dcs number of dcs returned in the dcs array
1026  @return true if the list was added to, false otherwise
1027 *******************************************************************/
1028
1029 static bool add_one_dc_unique(TALLOC_CTX *mem_ctx, const char *domain_name,
1030                               const char *dcname, struct sockaddr_storage *pss,
1031                               struct dc_name_ip **dcs, int *num)
1032 {
1033         int i = 0;
1034
1035         if (!NT_STATUS_IS_OK(check_negative_conn_cache(domain_name, dcname))) {
1036                 DEBUG(10, ("DC %s was in the negative conn cache\n", dcname));
1037                 return False;
1038         }
1039
1040         /* Make sure there's no duplicates in the list */
1041         for (i=0; i<*num; i++)
1042                 if (sockaddr_equal((struct sockaddr *)&(*dcs)[i].ss, (struct sockaddr *)pss))
1043                         return False;
1044
1045         *dcs = TALLOC_REALLOC_ARRAY(mem_ctx, *dcs, struct dc_name_ip, (*num)+1);
1046
1047         if (*dcs == NULL)
1048                 return False;
1049
1050         fstrcpy((*dcs)[*num].name, dcname);
1051         (*dcs)[*num].ss = *pss;
1052         *num += 1;
1053         return True;
1054 }
1055
1056 static bool add_sockaddr_to_array(TALLOC_CTX *mem_ctx,
1057                                   struct sockaddr_storage *pss, uint16 port,
1058                                   struct sockaddr_storage **addrs, int *num)
1059 {
1060         *addrs = TALLOC_REALLOC_ARRAY(mem_ctx, *addrs, struct sockaddr_storage, (*num)+1);
1061
1062         if (*addrs == NULL) {
1063                 *num = 0;
1064                 return False;
1065         }
1066
1067         (*addrs)[*num] = *pss;
1068         set_sockaddr_port((struct sockaddr *)&(*addrs)[*num], port);
1069
1070         *num += 1;
1071         return True;
1072 }
1073
1074 /*******************************************************************
1075  convert an ip to a name
1076 *******************************************************************/
1077
1078 static bool dcip_to_name(TALLOC_CTX *mem_ctx,
1079                 const struct winbindd_domain *domain,
1080                 struct sockaddr_storage *pss,
1081                 fstring name )
1082 {
1083         struct ip_service ip_list;
1084         uint32_t nt_version = NETLOGON_NT_VERSION_1;
1085
1086         ip_list.ss = *pss;
1087         ip_list.port = 0;
1088
1089 #ifdef WITH_ADS
1090         /* For active directory servers, try to get the ldap server name.
1091            None of these failures should be considered critical for now */
1092
1093         if (lp_security() == SEC_ADS) {
1094                 ADS_STRUCT *ads;
1095                 ADS_STATUS ads_status;
1096                 char addr[INET6_ADDRSTRLEN];
1097
1098                 print_sockaddr(addr, sizeof(addr), pss);
1099
1100                 ads = ads_init(domain->alt_name, domain->name, addr);
1101                 ads->auth.flags |= ADS_AUTH_NO_BIND;
1102
1103                 ads_status = ads_connect(ads);
1104                 if (ADS_ERR_OK(ads_status)) {
1105                         /* We got a cldap packet. */
1106                         fstrcpy(name, ads->config.ldap_server_name);
1107                         namecache_store(name, 0x20, 1, &ip_list);
1108
1109                         DEBUG(10,("dcip_to_name: flags = 0x%x\n", (unsigned int)ads->config.flags));
1110
1111                         if (domain->primary && (ads->config.flags & NBT_SERVER_KDC)) {
1112                                 if (ads_closest_dc(ads)) {
1113                                         char *sitename = sitename_fetch(ads->config.realm);
1114
1115                                         /* We're going to use this KDC for this realm/domain.
1116                                            If we are using sites, then force the krb5 libs
1117                                            to use this KDC. */
1118
1119                                         create_local_private_krb5_conf_for_domain(domain->alt_name,
1120                                                                         domain->name,
1121                                                                         sitename,
1122                                                                         pss);
1123
1124                                         SAFE_FREE(sitename);
1125                                 } else {
1126                                         /* use an off site KDC */
1127                                         create_local_private_krb5_conf_for_domain(domain->alt_name,
1128                                                                         domain->name,
1129                                                                         NULL,
1130                                                                         pss);
1131                                 }
1132                                 winbindd_set_locator_kdc_envs(domain);
1133
1134                                 /* Ensure we contact this DC also. */
1135                                 saf_store( domain->name, name);
1136                                 saf_store( domain->alt_name, name);
1137                         }
1138
1139                         ads_destroy( &ads );
1140                         return True;
1141                 }
1142
1143                 ads_destroy( &ads );
1144         }
1145 #endif
1146
1147         /* try GETDC requests next */
1148
1149         if (send_getdc_request(mem_ctx, winbind_messaging_context(),
1150                                pss, domain->name, &domain->sid,
1151                                nt_version)) {
1152                 const char *dc_name = NULL;
1153                 int i;
1154                 smb_msleep(100);
1155                 for (i=0; i<5; i++) {
1156                         if (receive_getdc_response(mem_ctx, pss, domain->name,
1157                                                    &nt_version,
1158                                                    &dc_name, NULL)) {
1159                                 fstrcpy(name, dc_name);
1160                                 namecache_store(name, 0x20, 1, &ip_list);
1161                                 return True;
1162                         }
1163                         smb_msleep(500);
1164                 }
1165         }
1166
1167         /* try node status request */
1168
1169         if ( name_status_find(domain->name, 0x1c, 0x20, pss, name) ) {
1170                 namecache_store(name, 0x20, 1, &ip_list);
1171                 return True;
1172         }
1173         return False;
1174 }
1175
1176 /*******************************************************************
1177  Retrieve a list of IP addresses for domain controllers.
1178
1179  The array is sorted in the preferred connection order.
1180
1181  @param[in] mem_ctx talloc memory context to allocate from
1182  @param[in] domain domain to retrieve DCs for
1183  @param[out] dcs array of dcs that will be returned
1184  @param[out] num_dcs number of dcs returned in the dcs array
1185  @return always true
1186 *******************************************************************/
1187
1188 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
1189                     struct dc_name_ip **dcs, int *num_dcs)
1190 {
1191         fstring dcname;
1192         struct  sockaddr_storage ss;
1193         struct  ip_service *ip_list = NULL;
1194         int     iplist_size = 0;
1195         int     i;
1196         bool    is_our_domain;
1197         enum security_types sec = (enum security_types)lp_security();
1198
1199         is_our_domain = strequal(domain->name, lp_workgroup());
1200
1201         /* If not our domain, get the preferred DC, by asking our primary DC */
1202         if ( !is_our_domain
1203                 && get_dc_name_via_netlogon(domain, dcname, &ss)
1204                 && add_one_dc_unique(mem_ctx, domain->name, dcname, &ss, dcs,
1205                        num_dcs) )
1206         {
1207                 char addr[INET6_ADDRSTRLEN];
1208                 print_sockaddr(addr, sizeof(addr), &ss);
1209                 DEBUG(10, ("Retrieved DC %s at %s via netlogon\n",
1210                            dcname, addr));
1211                 return True;
1212         }
1213
1214         if (sec == SEC_ADS) {
1215                 char *sitename = NULL;
1216
1217                 /* We need to make sure we know the local site before
1218                    doing any DNS queries, as this will restrict the
1219                    get_sorted_dc_list() call below to only fetching
1220                    DNS records for the correct site. */
1221
1222                 /* Find any DC to get the site record.
1223                    We deliberately don't care about the
1224                    return here. */
1225
1226                 get_dc_name(domain->name, domain->alt_name, dcname, &ss);
1227
1228                 sitename = sitename_fetch(domain->alt_name);
1229                 if (sitename) {
1230
1231                         /* Do the site-specific AD dns lookup first. */
1232                         get_sorted_dc_list(domain->alt_name, sitename, &ip_list,
1233                                &iplist_size, True);
1234
1235                         /* Add ips to the DC array.  We don't look up the name
1236                            of the DC in this function, but we fill in the char*
1237                            of the ip now to make the failed connection cache
1238                            work */
1239                         for ( i=0; i<iplist_size; i++ ) {
1240                                 char addr[INET6_ADDRSTRLEN];
1241                                 print_sockaddr(addr, sizeof(addr),
1242                                                 &ip_list[i].ss);
1243                                 add_one_dc_unique(mem_ctx,
1244                                                 domain->name,
1245                                                 addr,
1246                                                 &ip_list[i].ss,
1247                                                 dcs,
1248                                                 num_dcs);
1249                         }
1250
1251                         SAFE_FREE(ip_list);
1252                         SAFE_FREE(sitename);
1253                         iplist_size = 0;
1254                 }
1255
1256                 /* Now we add DCs from the main AD DNS lookup. */
1257                 get_sorted_dc_list(domain->alt_name, NULL, &ip_list,
1258                         &iplist_size, True);
1259
1260                 for ( i=0; i<iplist_size; i++ ) {
1261                         char addr[INET6_ADDRSTRLEN];
1262                         print_sockaddr(addr, sizeof(addr),
1263                                         &ip_list[i].ss);
1264                         add_one_dc_unique(mem_ctx,
1265                                         domain->name,
1266                                         addr,
1267                                         &ip_list[i].ss,
1268                                         dcs,
1269                                         num_dcs);
1270                 }
1271
1272                 SAFE_FREE(ip_list);
1273                 iplist_size = 0;
1274         }
1275
1276         /* Try standard netbios queries if no ADS */
1277         if (*num_dcs == 0) {
1278                 get_sorted_dc_list(domain->name, NULL, &ip_list, &iplist_size,
1279                        False);
1280
1281                 for ( i=0; i<iplist_size; i++ ) {
1282                         char addr[INET6_ADDRSTRLEN];
1283                         print_sockaddr(addr, sizeof(addr),
1284                                         &ip_list[i].ss);
1285                         add_one_dc_unique(mem_ctx,
1286                                         domain->name,
1287                                         addr,
1288                                         &ip_list[i].ss,
1289                                         dcs,
1290                                         num_dcs);
1291                 }
1292
1293                 SAFE_FREE(ip_list);
1294                 iplist_size = 0;
1295         }
1296
1297         return True;
1298 }
1299
1300 /*******************************************************************
1301  Find and make a connection to a DC in the given domain.
1302
1303  @param[in] mem_ctx talloc memory context to allocate from
1304  @param[in] domain domain to find a dc in
1305  @param[out] dcname NetBIOS or FQDN of DC that's connected to
1306  @param[out] pss DC Internet address and port
1307  @param[out] fd fd of the open socket connected to the newly found dc
1308  @return true when a DC connection is made, false otherwise
1309 *******************************************************************/
1310
1311 static bool find_new_dc(TALLOC_CTX *mem_ctx,
1312                         struct winbindd_domain *domain,
1313                         fstring dcname, struct sockaddr_storage *pss, int *fd)
1314 {
1315         struct dc_name_ip *dcs = NULL;
1316         int num_dcs = 0;
1317
1318         const char **dcnames = NULL;
1319         int num_dcnames = 0;
1320
1321         struct sockaddr_storage *addrs = NULL;
1322         int num_addrs = 0;
1323
1324         int i, fd_index;
1325
1326         *fd = -1;
1327
1328  again:
1329         if (!get_dcs(mem_ctx, domain, &dcs, &num_dcs) || (num_dcs == 0))
1330                 return False;
1331
1332         for (i=0; i<num_dcs; i++) {
1333
1334                 if (!add_string_to_array(mem_ctx, dcs[i].name,
1335                                     &dcnames, &num_dcnames)) {
1336                         return False;
1337                 }
1338                 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 445,
1339                                       &addrs, &num_addrs)) {
1340                         return False;
1341                 }
1342
1343                 if (!add_string_to_array(mem_ctx, dcs[i].name,
1344                                     &dcnames, &num_dcnames)) {
1345                         return False;
1346                 }
1347                 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 139,
1348                                       &addrs, &num_addrs)) {
1349                         return False;
1350                 }
1351         }
1352
1353         if ((num_dcnames == 0) || (num_dcnames != num_addrs))
1354                 return False;
1355
1356         if ((addrs == NULL) || (dcnames == NULL))
1357                 return False;
1358
1359         /* 5 second timeout. */
1360         if (!open_any_socket_out(addrs, num_addrs, 5000, &fd_index, fd) ) {
1361                 for (i=0; i<num_dcs; i++) {
1362                         char ab[INET6_ADDRSTRLEN];
1363                         print_sockaddr(ab, sizeof(ab), &dcs[i].ss);
1364                         DEBUG(10, ("find_new_dc: open_any_socket_out failed for "
1365                                 "domain %s address %s. Error was %s\n",
1366                                 domain->name, ab, strerror(errno) ));
1367                         winbind_add_failed_connection_entry(domain,
1368                                 dcs[i].name, NT_STATUS_UNSUCCESSFUL);
1369                 }
1370                 return False;
1371         }
1372
1373         *pss = addrs[fd_index];
1374
1375         if (*dcnames[fd_index] != '\0' && !is_ipaddress(dcnames[fd_index])) {
1376                 /* Ok, we've got a name for the DC */
1377                 fstrcpy(dcname, dcnames[fd_index]);
1378                 return True;
1379         }
1380
1381         /* Try to figure out the name */
1382         if (dcip_to_name(mem_ctx, domain, pss, dcname)) {
1383                 return True;
1384         }
1385
1386         /* We can not continue without the DC's name */
1387         winbind_add_failed_connection_entry(domain, dcs[fd_index].name,
1388                                     NT_STATUS_UNSUCCESSFUL);
1389
1390         /* Throw away all arrays as we're doing this again. */
1391         TALLOC_FREE(dcs);
1392         num_dcs = 0;
1393
1394         TALLOC_FREE(dcnames);
1395         num_dcnames = 0;
1396
1397         TALLOC_FREE(addrs);
1398         num_addrs = 0;
1399
1400         close(*fd);
1401         *fd = -1;
1402
1403         goto again;
1404 }
1405
1406 static NTSTATUS cm_open_connection(struct winbindd_domain *domain,
1407                                    struct winbindd_cm_conn *new_conn)
1408 {
1409         TALLOC_CTX *mem_ctx;
1410         NTSTATUS result;
1411         char *saf_servername = saf_fetch( domain->name );
1412         int retries;
1413
1414         if ((mem_ctx = talloc_init("cm_open_connection")) == NULL) {
1415                 SAFE_FREE(saf_servername);
1416                 set_domain_offline(domain);
1417                 return NT_STATUS_NO_MEMORY;
1418         }
1419
1420         /* we have to check the server affinity cache here since 
1421            later we selecte a DC based on response time and not preference */
1422
1423         /* Check the negative connection cache
1424            before talking to it. It going down may have
1425            triggered the reconnection. */
1426
1427         if ( saf_servername && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, saf_servername))) {
1428
1429                 DEBUG(10,("cm_open_connection: saf_servername is '%s' for domain %s\n",
1430                         saf_servername, domain->name ));
1431
1432                 /* convert an ip address to a name */
1433                 if (is_ipaddress( saf_servername ) ) {
1434                         fstring saf_name;
1435                         struct sockaddr_storage ss;
1436
1437                         if (!interpret_string_addr(&ss, saf_servername,
1438                                                 AI_NUMERICHOST)) {
1439                                 return NT_STATUS_UNSUCCESSFUL;
1440                         }
1441                         if (dcip_to_name(mem_ctx, domain, &ss, saf_name )) {
1442                                 fstrcpy( domain->dcname, saf_name );
1443                         } else {
1444                                 winbind_add_failed_connection_entry(
1445                                         domain, saf_servername,
1446                                         NT_STATUS_UNSUCCESSFUL);
1447                         }
1448                 } else {
1449                         fstrcpy( domain->dcname, saf_servername );
1450                 }
1451
1452                 SAFE_FREE( saf_servername );
1453         }
1454
1455         for (retries = 0; retries < 3; retries++) {
1456                 int fd = -1;
1457                 bool retry = False;
1458
1459                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1460
1461                 DEBUG(10,("cm_open_connection: dcname is '%s' for domain %s\n",
1462                         domain->dcname, domain->name ));
1463
1464                 if (*domain->dcname 
1465                         && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, domain->dcname))
1466                         && (resolve_name(domain->dcname, &domain->dcaddr, 0x20)))
1467                 {
1468                         struct sockaddr_storage *addrs = NULL;
1469                         int num_addrs = 0;
1470                         int dummy = 0;
1471
1472                         if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 445, &addrs, &num_addrs)) {
1473                                 set_domain_offline(domain);
1474                                 talloc_destroy(mem_ctx);
1475                                 return NT_STATUS_NO_MEMORY;
1476                         }
1477                         if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 139, &addrs, &num_addrs)) {
1478                                 set_domain_offline(domain);
1479                                 talloc_destroy(mem_ctx);
1480                                 return NT_STATUS_NO_MEMORY;
1481                         }
1482
1483                         /* 5 second timeout. */
1484                         if (!open_any_socket_out(addrs, num_addrs, 5000, &dummy, &fd)) {
1485                                 fd = -1;
1486                         }
1487                 }
1488
1489                 if ((fd == -1) 
1490                         && !find_new_dc(mem_ctx, domain, domain->dcname, &domain->dcaddr, &fd))
1491                 {
1492                         /* This is the one place where we will
1493                            set the global winbindd offline state
1494                            to true, if a "WINBINDD_OFFLINE" entry
1495                            is found in the winbindd cache. */
1496                         set_global_winbindd_state_offline();
1497                         break;
1498                 }
1499
1500                 new_conn->cli = NULL;
1501
1502                 result = cm_prepare_connection(domain, fd, domain->dcname,
1503                         &new_conn->cli, &retry);
1504
1505                 if (!retry)
1506                         break;
1507         }
1508
1509         if (NT_STATUS_IS_OK(result)) {
1510
1511                 winbindd_set_locator_kdc_envs(domain);
1512
1513                 if (domain->online == False) {
1514                         /* We're changing state from offline to online. */
1515                         set_global_winbindd_state_online();
1516                 }
1517                 set_domain_online(domain);
1518         } else {
1519                 /* Ensure we setup the retry handler. */
1520                 set_domain_offline(domain);
1521         }
1522
1523         talloc_destroy(mem_ctx);
1524         return result;
1525 }
1526
1527 /* Close down all open pipes on a connection. */
1528
1529 void invalidate_cm_connection(struct winbindd_cm_conn *conn)
1530 {
1531         /* We're closing down a possibly dead
1532            connection. Don't have impossibly long (10s) timeouts. */
1533
1534         if (conn->cli) {
1535                 cli_set_timeout(conn->cli, 1000); /* 1 second. */
1536         }
1537
1538         if (conn->samr_pipe != NULL) {
1539                 TALLOC_FREE(conn->samr_pipe);
1540                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1541                 if (conn->cli) {
1542                         cli_set_timeout(conn->cli, 500);
1543                 }
1544         }
1545
1546         if (conn->lsa_pipe != NULL) {
1547                 TALLOC_FREE(conn->lsa_pipe);
1548                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1549                 if (conn->cli) {
1550                         cli_set_timeout(conn->cli, 500);
1551                 }
1552         }
1553
1554         if (conn->netlogon_pipe != NULL) {
1555                 TALLOC_FREE(conn->netlogon_pipe);
1556                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1557                 if (conn->cli) {
1558                         cli_set_timeout(conn->cli, 500);
1559                 }
1560         }
1561
1562         if (conn->cli) {
1563                 cli_shutdown(conn->cli);
1564         }
1565
1566         conn->cli = NULL;
1567 }
1568
1569 void close_conns_after_fork(void)
1570 {
1571         struct winbindd_domain *domain;
1572
1573         for (domain = domain_list(); domain; domain = domain->next) {
1574                 if (domain->conn.cli == NULL)
1575                         continue;
1576
1577                 if (domain->conn.cli->fd == -1)
1578                         continue;
1579
1580                 close(domain->conn.cli->fd);
1581                 domain->conn.cli->fd = -1;
1582         }
1583 }
1584
1585 static bool connection_ok(struct winbindd_domain *domain)
1586 {
1587         if (domain->conn.cli == NULL) {
1588                 DEBUG(8, ("connection_ok: Connection to %s for domain %s has NULL "
1589                           "cli!\n", domain->dcname, domain->name));
1590                 return False;
1591         }
1592
1593         if (!domain->conn.cli->initialised) {
1594                 DEBUG(3, ("connection_ok: Connection to %s for domain %s was never "
1595                           "initialised!\n", domain->dcname, domain->name));
1596                 return False;
1597         }
1598
1599         if (domain->conn.cli->fd == -1) {
1600                 DEBUG(3, ("connection_ok: Connection to %s for domain %s has died or was "
1601                           "never started (fd == -1)\n", 
1602                           domain->dcname, domain->name));
1603                 return False;
1604         }
1605
1606         if (domain->online == False) {
1607                 DEBUG(3, ("connection_ok: Domain %s is offline\n", domain->name));
1608                 return False;
1609         }
1610
1611         return True;
1612 }
1613
1614 /* Initialize a new connection up to the RPC BIND.
1615    Bypass online status check so always does network calls. */
1616
1617 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain)
1618 {
1619         NTSTATUS result;
1620
1621         /* Internal connections never use the network. */
1622         if (domain->internal) {
1623                 domain->initialized = True;
1624                 return NT_STATUS_OK;
1625         }
1626
1627         if (connection_ok(domain)) {
1628                 if (!domain->initialized) {
1629                         set_dc_type_and_flags(domain);
1630                 }
1631                 return NT_STATUS_OK;
1632         }
1633
1634         invalidate_cm_connection(&domain->conn);
1635
1636         result = cm_open_connection(domain, &domain->conn);
1637
1638         if (NT_STATUS_IS_OK(result) && !domain->initialized) {
1639                 set_dc_type_and_flags(domain);
1640         }
1641
1642         return result;
1643 }
1644
1645 NTSTATUS init_dc_connection(struct winbindd_domain *domain)
1646 {
1647         if (domain->initialized && !domain->online) {
1648                 /* We check for online status elsewhere. */
1649                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1650         }
1651
1652         return init_dc_connection_network(domain);
1653 }
1654
1655 /******************************************************************************
1656  Set the trust flags (direction and forest location) for a domain
1657 ******************************************************************************/
1658
1659 static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain )
1660 {
1661         struct winbindd_domain *our_domain;
1662         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1663         struct netr_DomainTrustList trusts;
1664         int i;
1665         uint32 flags = (NETR_TRUST_FLAG_IN_FOREST |
1666                         NETR_TRUST_FLAG_OUTBOUND |
1667                         NETR_TRUST_FLAG_INBOUND);
1668         struct rpc_pipe_client *cli;
1669         TALLOC_CTX *mem_ctx = NULL;
1670
1671         DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s\n", domain->name ));
1672
1673         /* Our primary domain doesn't need to worry about trust flags.
1674            Force it to go through the network setup */
1675         if ( domain->primary ) {                
1676                 return False;           
1677         }
1678
1679         our_domain = find_our_domain();
1680
1681         if ( !connection_ok(our_domain) ) {
1682                 DEBUG(3,("set_dc_type_and_flags_trustinfo: No connection to our domain!\n"));           
1683                 return False;
1684         }
1685
1686         /* This won't work unless our domain is AD */
1687
1688         if ( !our_domain->active_directory ) {
1689                 return False;
1690         }
1691
1692         /* Use DsEnumerateDomainTrusts to get us the trust direction
1693            and type */
1694
1695         result = cm_connect_netlogon(our_domain, &cli);
1696
1697         if (!NT_STATUS_IS_OK(result)) {
1698                 DEBUG(5, ("set_dc_type_and_flags_trustinfo: Could not open "
1699                           "a connection to %s for PIPE_NETLOGON (%s)\n", 
1700                           domain->name, nt_errstr(result)));
1701                 return False;
1702         }
1703
1704         if ( (mem_ctx = talloc_init("set_dc_type_and_flags_trustinfo")) == NULL ) {
1705                 DEBUG(0,("set_dc_type_and_flags_trustinfo: talloc_init() failed!\n"));
1706                 return False;
1707         }       
1708
1709         result = rpccli_netr_DsrEnumerateDomainTrusts(cli, mem_ctx,
1710                                                       cli->desthost,
1711                                                       flags,
1712                                                       &trusts,
1713                                                       NULL);
1714         if (!NT_STATUS_IS_OK(result)) {
1715                 DEBUG(0,("set_dc_type_and_flags_trustinfo: "
1716                         "failed to query trusted domain list: %s\n",
1717                         nt_errstr(result)));
1718                 talloc_destroy(mem_ctx);
1719                 return false;
1720         }
1721
1722         /* Now find the domain name and get the flags */
1723
1724         for ( i=0; i<trusts.count; i++ ) {
1725                 if ( strequal( domain->name, trusts.array[i].netbios_name) ) {
1726                         domain->domain_flags          = trusts.array[i].trust_flags;
1727                         domain->domain_type           = trusts.array[i].trust_type;
1728                         domain->domain_trust_attribs  = trusts.array[i].trust_attributes;
1729
1730                         if ( domain->domain_type == NETR_TRUST_TYPE_UPLEVEL )
1731                                 domain->active_directory = True;
1732
1733                         /* This flag is only set if the domain is *our* 
1734                            primary domain and the primary domain is in
1735                            native mode */
1736
1737                         domain->native_mode = (domain->domain_flags & NETR_TRUST_FLAG_NATIVE);
1738
1739                         DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s is %sin "
1740                                   "native mode.\n", domain->name, 
1741                                   domain->native_mode ? "" : "NOT "));
1742
1743                         DEBUG(5,("set_dc_type_and_flags_trustinfo: domain %s is %s"
1744                                  "running active directory.\n", domain->name, 
1745                                  domain->active_directory ? "" : "NOT "));
1746
1747
1748                         domain->initialized = True;
1749
1750                         if ( !winbindd_can_contact_domain( domain) )
1751                                 domain->internal = True;
1752
1753                         break;
1754                 }               
1755         }
1756
1757         talloc_destroy( mem_ctx );
1758
1759         return domain->initialized;     
1760 }
1761
1762 /******************************************************************************
1763  We can 'sense' certain things about the DC by it's replies to certain
1764  questions.
1765
1766  This tells us if this particular remote server is Active Directory, and if it
1767  is native mode.
1768 ******************************************************************************/
1769
1770 static void set_dc_type_and_flags_connect( struct winbindd_domain *domain )
1771 {
1772         NTSTATUS                result;
1773         WERROR werr;
1774         TALLOC_CTX              *mem_ctx = NULL;
1775         struct rpc_pipe_client  *cli;
1776         POLICY_HND pol;
1777         union dssetup_DsRoleInfo info;
1778         union lsa_PolicyInformation *lsa_info = NULL;
1779
1780         if (!connection_ok(domain)) {
1781                 return;
1782         }
1783
1784         mem_ctx = talloc_init("set_dc_type_and_flags on domain %s\n",
1785                               domain->name);
1786         if (!mem_ctx) {
1787                 DEBUG(1, ("set_dc_type_and_flags_connect: talloc_init() failed\n"));
1788                 return;
1789         }
1790
1791         DEBUG(5, ("set_dc_type_and_flags_connect: domain %s\n", domain->name ));
1792
1793         result = cli_rpc_pipe_open_noauth(domain->conn.cli,
1794                                           &ndr_table_dssetup.syntax_id,
1795                                           &cli);
1796
1797         if (!NT_STATUS_IS_OK(result)) {
1798                 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
1799                           "PI_DSSETUP on domain %s: (%s)\n",
1800                           domain->name, nt_errstr(result)));
1801
1802                 /* if this is just a non-AD domain we need to continue
1803                  * identifying so that we can in the end return with
1804                  * domain->initialized = True - gd */
1805
1806                 goto no_dssetup;
1807         }
1808
1809         result = rpccli_dssetup_DsRoleGetPrimaryDomainInformation(cli, mem_ctx,
1810                                                                   DS_ROLE_BASIC_INFORMATION,
1811                                                                   &info,
1812                                                                   &werr);
1813         TALLOC_FREE(cli);
1814
1815         if (!NT_STATUS_IS_OK(result)) {
1816                 DEBUG(5, ("set_dc_type_and_flags_connect: rpccli_ds_getprimarydominfo "
1817                           "on domain %s failed: (%s)\n",
1818                           domain->name, nt_errstr(result)));
1819
1820                 /* older samba3 DCs will return DCERPC_FAULT_OP_RNG_ERROR for
1821                  * every opcode on the DSSETUP pipe, continue with
1822                  * no_dssetup mode here as well to get domain->initialized
1823                  * set - gd */
1824
1825                 if (NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR) {
1826                         goto no_dssetup;
1827                 }
1828
1829                 TALLOC_FREE(mem_ctx);
1830                 return;
1831         }
1832
1833         if ((info.basic.flags & DS_ROLE_PRIMARY_DS_RUNNING) &&
1834             !(info.basic.flags & DS_ROLE_PRIMARY_DS_MIXED_MODE)) {
1835                 domain->native_mode = True;
1836         } else {
1837                 domain->native_mode = False;
1838         }
1839
1840 no_dssetup:
1841         result = cli_rpc_pipe_open_noauth(domain->conn.cli,
1842                                           &ndr_table_lsarpc.syntax_id, &cli);
1843
1844         if (!NT_STATUS_IS_OK(result)) {
1845                 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
1846                           "PI_LSARPC on domain %s: (%s)\n",
1847                           domain->name, nt_errstr(result)));
1848                 TALLOC_FREE(cli);
1849                 TALLOC_FREE(mem_ctx);
1850                 return;
1851         }
1852
1853         result = rpccli_lsa_open_policy2(cli, mem_ctx, True, 
1854                                          SEC_RIGHTS_MAXIMUM_ALLOWED, &pol);
1855
1856         if (NT_STATUS_IS_OK(result)) {
1857                 /* This particular query is exactly what Win2k clients use 
1858                    to determine that the DC is active directory */
1859                 result = rpccli_lsa_QueryInfoPolicy2(cli, mem_ctx,
1860                                                      &pol,
1861                                                      LSA_POLICY_INFO_DNS,
1862                                                      &lsa_info);
1863         }
1864
1865         if (NT_STATUS_IS_OK(result)) {
1866                 domain->active_directory = True;
1867
1868                 if (lsa_info->dns.name.string) {
1869                         fstrcpy(domain->name, lsa_info->dns.name.string);
1870                 }
1871
1872                 if (lsa_info->dns.dns_domain.string) {
1873                         fstrcpy(domain->alt_name,
1874                                 lsa_info->dns.dns_domain.string);
1875                 }
1876
1877                 /* See if we can set some domain trust flags about
1878                    ourself */
1879
1880                 if (lsa_info->dns.dns_forest.string) {
1881                         fstrcpy(domain->forest_name,
1882                                 lsa_info->dns.dns_forest.string);
1883
1884                         if (strequal(domain->forest_name, domain->alt_name)) {
1885                                 domain->domain_flags |= NETR_TRUST_FLAG_TREEROOT;
1886                         }
1887                 }
1888
1889                 if (lsa_info->dns.sid) {
1890                         sid_copy(&domain->sid, lsa_info->dns.sid);
1891                 }
1892         } else {
1893                 domain->active_directory = False;
1894
1895                 result = rpccli_lsa_open_policy(cli, mem_ctx, True, 
1896                                                 SEC_RIGHTS_MAXIMUM_ALLOWED,
1897                                                 &pol);
1898
1899                 if (!NT_STATUS_IS_OK(result)) {
1900                         goto done;
1901                 }
1902
1903                 result = rpccli_lsa_QueryInfoPolicy(cli, mem_ctx,
1904                                                     &pol,
1905                                                     LSA_POLICY_INFO_ACCOUNT_DOMAIN,
1906                                                     &lsa_info);
1907
1908                 if (NT_STATUS_IS_OK(result)) {
1909
1910                         if (lsa_info->account_domain.name.string) {
1911                                 fstrcpy(domain->name,
1912                                         lsa_info->account_domain.name.string);
1913                         }
1914
1915                         if (lsa_info->account_domain.sid) {
1916                                 sid_copy(&domain->sid, lsa_info->account_domain.sid);
1917                         }
1918                 }
1919         }
1920 done:
1921
1922         DEBUG(5, ("set_dc_type_and_flags_connect: domain %s is %sin native mode.\n",
1923                   domain->name, domain->native_mode ? "" : "NOT "));
1924
1925         DEBUG(5,("set_dc_type_and_flags_connect: domain %s is %srunning active directory.\n",
1926                   domain->name, domain->active_directory ? "" : "NOT "));
1927
1928         TALLOC_FREE(cli);
1929
1930         TALLOC_FREE(mem_ctx);
1931
1932         domain->initialized = True;
1933 }
1934
1935 /**********************************************************************
1936  Set the domain_flags (trust attributes, domain operating modes, etc... 
1937 ***********************************************************************/
1938
1939 static void set_dc_type_and_flags( struct winbindd_domain *domain )
1940 {
1941         /* we always have to contact our primary domain */
1942
1943         if ( domain->primary ) {
1944                 DEBUG(10,("set_dc_type_and_flags: setting up flags for "
1945                           "primary domain\n"));
1946                 set_dc_type_and_flags_connect( domain );
1947                 return;         
1948         }
1949
1950         /* Use our DC to get the information if possible */
1951
1952         if ( !set_dc_type_and_flags_trustinfo( domain ) ) {
1953                 /* Otherwise, fallback to contacting the 
1954                    domain directly */
1955                 set_dc_type_and_flags_connect( domain );
1956         }
1957
1958         return;
1959 }
1960
1961
1962
1963 /**********************************************************************
1964 ***********************************************************************/
1965
1966 static bool cm_get_schannel_dcinfo(struct winbindd_domain *domain,
1967                                    struct dcinfo **ppdc)
1968 {
1969         NTSTATUS result;
1970         struct rpc_pipe_client *netlogon_pipe;
1971
1972         if (lp_client_schannel() == False) {
1973                 return False;
1974         }
1975
1976         result = cm_connect_netlogon(domain, &netlogon_pipe);
1977         if (!NT_STATUS_IS_OK(result)) {
1978                 return False;
1979         }
1980
1981         /* Return a pointer to the struct dcinfo from the
1982            netlogon pipe. */
1983
1984         if (!domain->conn.netlogon_pipe->dc) {
1985                 return false;
1986         }
1987
1988         *ppdc = domain->conn.netlogon_pipe->dc;
1989         return True;
1990 }
1991
1992 NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
1993                         struct rpc_pipe_client **cli, POLICY_HND *sam_handle)
1994 {
1995         struct winbindd_cm_conn *conn;
1996         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1997         struct dcinfo *p_dcinfo;
1998         char *machine_password = NULL;
1999         char *machine_account = NULL;
2000         char *domain_name = NULL;
2001
2002         result = init_dc_connection(domain);
2003         if (!NT_STATUS_IS_OK(result)) {
2004                 return result;
2005         }
2006
2007         conn = &domain->conn;
2008
2009         if (conn->samr_pipe != NULL) {
2010                 goto done;
2011         }
2012
2013
2014         /*
2015          * No SAMR pipe yet. Attempt to get an NTLMSSP SPNEGO authenticated
2016          * sign and sealed pipe using the machine account password by
2017          * preference. If we can't - try schannel, if that fails, try
2018          * anonymous.
2019          */
2020
2021         if ((conn->cli->user_name[0] == '\0') ||
2022             (conn->cli->domain[0] == '\0') || 
2023             (conn->cli->password == NULL || conn->cli->password[0] == '\0'))
2024         {
2025                 result = get_trust_creds(domain, &machine_password,
2026                                          &machine_account, NULL);
2027                 if (!NT_STATUS_IS_OK(result)) {
2028                         DEBUG(10, ("cm_connect_sam: No no user available for "
2029                                    "domain %s, trying schannel\n", conn->cli->domain));
2030                         goto schannel;
2031                 }
2032                 domain_name = domain->name;
2033         } else {
2034                 machine_password = SMB_STRDUP(conn->cli->password);
2035                 machine_account = SMB_STRDUP(conn->cli->user_name);
2036                 domain_name = conn->cli->domain;
2037         }
2038
2039         if (!machine_password || !machine_account) {
2040                 result = NT_STATUS_NO_MEMORY;
2041                 goto done;
2042         }
2043
2044         /* We have an authenticated connection. Use a NTLMSSP SPNEGO
2045            authenticated SAMR pipe with sign & seal. */
2046         result = cli_rpc_pipe_open_spnego_ntlmssp(conn->cli,
2047                                                   &ndr_table_samr.syntax_id,
2048                                                   PIPE_AUTH_LEVEL_PRIVACY,
2049                                                   domain_name,
2050                                                   machine_account,
2051                                                   machine_password,
2052                                                   &conn->samr_pipe);
2053
2054         if (!NT_STATUS_IS_OK(result)) {
2055                 DEBUG(10,("cm_connect_sam: failed to connect to SAMR "
2056                           "pipe for domain %s using NTLMSSP "
2057                           "authenticated pipe: user %s\\%s. Error was "
2058                           "%s\n", domain->name, domain_name,
2059                           machine_account, nt_errstr(result)));
2060                 goto schannel;
2061         }
2062
2063         DEBUG(10,("cm_connect_sam: connected to SAMR pipe for "
2064                   "domain %s using NTLMSSP authenticated "
2065                   "pipe: user %s\\%s\n", domain->name,
2066                   domain_name, machine_account));
2067
2068         result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
2069                                       conn->samr_pipe->desthost,
2070                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
2071                                       &conn->sam_connect_handle);
2072         if (NT_STATUS_IS_OK(result)) {
2073                 goto open_domain;
2074         }
2075         DEBUG(10,("cm_connect_sam: ntlmssp-sealed rpccli_samr_Connect2 "
2076                   "failed for domain %s, error was %s. Trying schannel\n",
2077                   domain->name, nt_errstr(result) ));
2078         TALLOC_FREE(conn->samr_pipe);
2079
2080  schannel:
2081
2082         /* Fall back to schannel if it's a W2K pre-SP1 box. */
2083
2084         if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
2085                 /* If this call fails - conn->cli can now be NULL ! */
2086                 DEBUG(10, ("cm_connect_sam: Could not get schannel auth info "
2087                            "for domain %s, trying anon\n", domain->name));
2088                 goto anonymous;
2089         }
2090         result = cli_rpc_pipe_open_schannel_with_key
2091                 (conn->cli, &ndr_table_samr.syntax_id, PIPE_AUTH_LEVEL_PRIVACY,
2092                  domain->name, p_dcinfo, &conn->samr_pipe);
2093
2094         if (!NT_STATUS_IS_OK(result)) {
2095                 DEBUG(10,("cm_connect_sam: failed to connect to SAMR pipe for "
2096                           "domain %s using schannel. Error was %s\n",
2097                           domain->name, nt_errstr(result) ));
2098                 goto anonymous;
2099         }
2100         DEBUG(10,("cm_connect_sam: connected to SAMR pipe for domain %s using "
2101                   "schannel.\n", domain->name ));
2102
2103         result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
2104                                       conn->samr_pipe->desthost,
2105                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
2106                                       &conn->sam_connect_handle);
2107         if (NT_STATUS_IS_OK(result)) {
2108                 goto open_domain;
2109         }
2110         DEBUG(10,("cm_connect_sam: schannel-sealed rpccli_samr_Connect2 failed "
2111                   "for domain %s, error was %s. Trying anonymous\n",
2112                   domain->name, nt_errstr(result) ));
2113         TALLOC_FREE(conn->samr_pipe);
2114
2115  anonymous:
2116
2117         /* Finally fall back to anonymous. */
2118         result = cli_rpc_pipe_open_noauth(conn->cli, &ndr_table_samr.syntax_id,
2119                                           &conn->samr_pipe);
2120
2121         if (!NT_STATUS_IS_OK(result)) {
2122                 goto done;
2123         }
2124
2125         result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
2126                                       conn->samr_pipe->desthost,
2127                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
2128                                       &conn->sam_connect_handle);
2129         if (!NT_STATUS_IS_OK(result)) {
2130                 DEBUG(10,("cm_connect_sam: rpccli_samr_Connect2 failed "
2131                           "for domain %s Error was %s\n",
2132                           domain->name, nt_errstr(result) ));
2133                 goto done;
2134         }
2135
2136  open_domain:
2137         result = rpccli_samr_OpenDomain(conn->samr_pipe,
2138                                         mem_ctx,
2139                                         &conn->sam_connect_handle,
2140                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2141                                         &domain->sid,
2142                                         &conn->sam_domain_handle);
2143
2144  done:
2145
2146         if (!NT_STATUS_IS_OK(result)) {
2147                 invalidate_cm_connection(conn);
2148                 return result;
2149         }
2150
2151         *cli = conn->samr_pipe;
2152         *sam_handle = conn->sam_domain_handle;
2153         SAFE_FREE(machine_password);
2154         SAFE_FREE(machine_account);
2155         return result;
2156 }
2157
2158 NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
2159                         struct rpc_pipe_client **cli, POLICY_HND *lsa_policy)
2160 {
2161         struct winbindd_cm_conn *conn;
2162         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2163         struct dcinfo *p_dcinfo;
2164
2165         result = init_dc_connection(domain);
2166         if (!NT_STATUS_IS_OK(result))
2167                 return result;
2168
2169         conn = &domain->conn;
2170
2171         if (conn->lsa_pipe != NULL) {
2172                 goto done;
2173         }
2174
2175         if ((conn->cli->user_name[0] == '\0') ||
2176             (conn->cli->domain[0] == '\0') || 
2177             (conn->cli->password == NULL || conn->cli->password[0] == '\0')) {
2178                 DEBUG(10, ("cm_connect_lsa: No no user available for "
2179                            "domain %s, trying schannel\n", conn->cli->domain));
2180                 goto schannel;
2181         }
2182
2183         /* We have an authenticated connection. Use a NTLMSSP SPNEGO
2184          * authenticated LSA pipe with sign & seal. */
2185         result = cli_rpc_pipe_open_spnego_ntlmssp
2186                 (conn->cli, &ndr_table_lsarpc.syntax_id,
2187                  PIPE_AUTH_LEVEL_PRIVACY,
2188                  conn->cli->domain, conn->cli->user_name, conn->cli->password,
2189                  &conn->lsa_pipe);
2190
2191         if (!NT_STATUS_IS_OK(result)) {
2192                 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2193                           "domain %s using NTLMSSP authenticated pipe: user "
2194                           "%s\\%s. Error was %s. Trying schannel.\n",
2195                           domain->name, conn->cli->domain,
2196                           conn->cli->user_name, nt_errstr(result)));
2197                 goto schannel;
2198         }
2199
2200         DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2201                   "NTLMSSP authenticated pipe: user %s\\%s\n",
2202                   domain->name, conn->cli->domain, conn->cli->user_name ));
2203
2204         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2205                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2206                                         &conn->lsa_policy);
2207         if (NT_STATUS_IS_OK(result)) {
2208                 goto done;
2209         }
2210
2211         DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2212                   "schannel\n"));
2213
2214         TALLOC_FREE(conn->lsa_pipe);
2215
2216  schannel:
2217
2218         /* Fall back to schannel if it's a W2K pre-SP1 box. */
2219
2220         if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
2221                 /* If this call fails - conn->cli can now be NULL ! */
2222                 DEBUG(10, ("cm_connect_lsa: Could not get schannel auth info "
2223                            "for domain %s, trying anon\n", domain->name));
2224                 goto anonymous;
2225         }
2226         result = cli_rpc_pipe_open_schannel_with_key
2227                 (conn->cli, &ndr_table_lsarpc.syntax_id,
2228                  PIPE_AUTH_LEVEL_PRIVACY,
2229                  domain->name, p_dcinfo, &conn->lsa_pipe);
2230
2231         if (!NT_STATUS_IS_OK(result)) {
2232                 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2233                           "domain %s using schannel. Error was %s\n",
2234                           domain->name, nt_errstr(result) ));
2235                 goto anonymous;
2236         }
2237         DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2238                   "schannel.\n", domain->name ));
2239
2240         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2241                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2242                                         &conn->lsa_policy);
2243         if (NT_STATUS_IS_OK(result)) {
2244                 goto done;
2245         }
2246
2247         DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2248                   "anonymous\n"));
2249
2250         TALLOC_FREE(conn->lsa_pipe);
2251
2252  anonymous:
2253
2254         result = cli_rpc_pipe_open_noauth(conn->cli,
2255                                           &ndr_table_lsarpc.syntax_id,
2256                                           &conn->lsa_pipe);
2257         if (!NT_STATUS_IS_OK(result)) {
2258                 result = NT_STATUS_PIPE_NOT_AVAILABLE;
2259                 goto done;
2260         }
2261
2262         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2263                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2264                                         &conn->lsa_policy);
2265  done:
2266         if (!NT_STATUS_IS_OK(result)) {
2267                 invalidate_cm_connection(conn);
2268                 return result;
2269         }
2270
2271         *cli = conn->lsa_pipe;
2272         *lsa_policy = conn->lsa_policy;
2273         return result;
2274 }
2275
2276 /****************************************************************************
2277  Open the netlogon pipe to this DC. Use schannel if specified in client conf.
2278  session key stored in conn->netlogon_pipe->dc->sess_key.
2279 ****************************************************************************/
2280
2281 NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
2282                              struct rpc_pipe_client **cli)
2283 {
2284         struct winbindd_cm_conn *conn;
2285         NTSTATUS result;
2286
2287         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
2288         uint8  mach_pwd[16];
2289         uint32  sec_chan_type;
2290         const char *account_name;
2291         struct rpc_pipe_client *netlogon_pipe = NULL;
2292
2293         *cli = NULL;
2294
2295         result = init_dc_connection(domain);
2296         if (!NT_STATUS_IS_OK(result)) {
2297                 return result;
2298         }
2299
2300         conn = &domain->conn;
2301
2302         if (conn->netlogon_pipe != NULL) {
2303                 *cli = conn->netlogon_pipe;
2304                 return NT_STATUS_OK;
2305         }
2306
2307         result = cli_rpc_pipe_open_noauth(conn->cli,
2308                                           &ndr_table_netlogon.syntax_id,
2309                                           &netlogon_pipe);
2310         if (!NT_STATUS_IS_OK(result)) {
2311                 return result;
2312         }
2313
2314         if ((!IS_DC) && (!domain->primary)) {
2315                 /* Clear the schannel request bit and drop down */
2316                 neg_flags &= ~NETLOGON_NEG_SCHANNEL;            
2317                 goto no_schannel;
2318         }
2319
2320         if (lp_client_schannel() != False) {
2321                 neg_flags |= NETLOGON_NEG_SCHANNEL;
2322         }
2323
2324         if (!get_trust_pw_hash(domain->name, mach_pwd, &account_name,
2325                                &sec_chan_type))
2326         {
2327                 TALLOC_FREE(netlogon_pipe);
2328                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
2329         }
2330
2331         result = rpccli_netlogon_setup_creds(
2332                  netlogon_pipe,
2333                  domain->dcname, /* server name. */
2334                  domain->name,   /* domain name */
2335                  global_myname(), /* client name */
2336                  account_name,   /* machine account */
2337                  mach_pwd,       /* machine password */
2338                  sec_chan_type,  /* from get_trust_pw */
2339                  &neg_flags);
2340
2341         if (!NT_STATUS_IS_OK(result)) {
2342                 TALLOC_FREE(netlogon_pipe);
2343                 return result;
2344         }
2345
2346         if ((lp_client_schannel() == True) &&
2347                         ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2348                 DEBUG(3, ("Server did not offer schannel\n"));
2349                 TALLOC_FREE(netlogon_pipe);
2350                 return NT_STATUS_ACCESS_DENIED;
2351         }
2352
2353  no_schannel:
2354         if ((lp_client_schannel() == False) ||
2355                         ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2356                 /*
2357                  * NetSamLogonEx only works for schannel
2358                  */
2359                 domain->can_do_samlogon_ex = False;
2360
2361                 /* We're done - just keep the existing connection to NETLOGON
2362                  * open */
2363                 conn->netlogon_pipe = netlogon_pipe;
2364                 *cli = conn->netlogon_pipe;
2365                 return NT_STATUS_OK;
2366         }
2367
2368         /* Using the credentials from the first pipe, open a signed and sealed
2369            second netlogon pipe. The session key is stored in the schannel
2370            part of the new pipe auth struct.
2371         */
2372
2373         result = cli_rpc_pipe_open_schannel_with_key(
2374                 conn->cli, &ndr_table_netlogon.syntax_id,
2375                 PIPE_AUTH_LEVEL_PRIVACY, domain->name, netlogon_pipe->dc,
2376                 &conn->netlogon_pipe);
2377
2378         /* We can now close the initial netlogon pipe. */
2379         TALLOC_FREE(netlogon_pipe);
2380
2381         if (!NT_STATUS_IS_OK(result)) {
2382                 DEBUG(3, ("Could not open schannel'ed NETLOGON pipe. Error "
2383                           "was %s\n", nt_errstr(result)));
2384
2385                 /* make sure we return something besides OK */
2386                 return !NT_STATUS_IS_OK(result) ? result : NT_STATUS_PIPE_NOT_AVAILABLE;
2387         }
2388
2389         /*
2390          * Try NetSamLogonEx for AD domains
2391          */
2392         domain->can_do_samlogon_ex = domain->active_directory;
2393
2394         *cli = conn->netlogon_pipe;
2395         return NT_STATUS_OK;
2396 }