summaryrefslogtreecommitdiff
path: root/source3/nsswitch/winbindd_rpc.c
blob: 33339d7ca03be6309aa7b3b0f557054abfb9ac9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
/* 
   Unix SMB/CIFS implementation.

   Winbind rpc backend functions

   Copyright (C) Tim Potter 2000-2001,2003
   Copyright (C) Andrew Tridgell 2001
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "winbindd.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND


/* Query display info for a domain.  This returns enough information plus a
   bit extra to give an overview of domain users for the User Manager
   application. */
static NTSTATUS query_user_list(struct winbindd_domain *domain,
			       TALLOC_CTX *mem_ctx,
			       uint32 *num_entries, 
			       WINBIND_USERINFO **info)
{
	CLI_POLICY_HND *hnd;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	POLICY_HND dom_pol;
	BOOL got_dom_pol = False;
	uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
	unsigned int i, start_idx, retry;

	DEBUG(3,("rpc: query_user_list\n"));

	*num_entries = 0;
	*info = NULL;

	retry = 0;
	do {
		/* Get sam handle */

		if ( !NT_STATUS_IS_OK(result = cm_get_sam_handle(domain->name, &hnd)) )
			return result;

		/* Get domain handle */

		result = cli_samr_open_domain(hnd->cli, mem_ctx, &hnd->pol,
						des_access, &domain->sid, &dom_pol);

	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) && hnd && hnd->cli && hnd->cli->fd == -1);

	if (!NT_STATUS_IS_OK(result))
		goto done;

	got_dom_pol = True;

	i = start_idx = 0;
	do {
		TALLOC_CTX *ctx2;
		char **dom_users;
		uint32 num_dom_users, *dom_rids, j, size = 0xffff;
		uint16 acb_mask = ACB_NORMAL;

		if (!(ctx2 = talloc_init("winbindd enum_users"))) {
			result = NT_STATUS_NO_MEMORY;
			goto done;
		}		

		result = cli_samr_enum_dom_users(
			hnd->cli, ctx2, &dom_pol, &start_idx, acb_mask,
			size, &dom_users, &dom_rids, &num_dom_users);

		*num_entries += num_dom_users;

		*info = talloc_realloc(
			mem_ctx, *info, 
			(*num_entries) * sizeof(WINBIND_USERINFO));

		if (!(*info)) {
			result = NT_STATUS_NO_MEMORY;
			talloc_destroy(ctx2);
			goto done;
		}

		for (j = 0; j < num_dom_users; i++, j++) {
			(*info)[i].acct_name = 
				talloc_strdup(mem_ctx, dom_users[j]);
			(*info)[i].full_name = talloc_strdup(mem_ctx, "");
			(*info)[i].user_sid = rid_to_talloced_sid(domain, mem_ctx, dom_rids[j]);
			/* For the moment we set the primary group for
			   every user to be the Domain Users group.
			   There are serious problems with determining
			   the actual primary group for large domains.
			   This should really be made into a 'winbind
			   force group' smb.conf parameter or
			   something like that. */
			(*info)[i].group_sid 
				= rid_to_talloced_sid(domain, 
						      mem_ctx, 
						      DOMAIN_GROUP_RID_USERS);
		}

		talloc_destroy(ctx2);

	} while (NT_STATUS_EQUAL(result, STATUS_MORE_ENTRIES));

 done:

	if (got_dom_pol)
		cli_samr_close(hnd->cli, mem_ctx, &dom_pol);

	return result;
}

/* list all domain groups */
static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
				TALLOC_CTX *mem_ctx,
				uint32 *num_entries, 
				struct acct_info **info)
{
	uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
	CLI_POLICY_HND *hnd;
	POLICY_HND dom_pol;
	NTSTATUS status;
	uint32 start = 0;
	int retry;
	NTSTATUS result;

	*num_entries = 0;
	*info = NULL;

	DEBUG(3,("rpc: enum_dom_groups\n"));

	retry = 0;
	do {
		if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(domain->name, &hnd)))
			return result;

		status = cli_samr_open_domain(hnd->cli, mem_ctx,
					      &hnd->pol, des_access, &domain->sid, &dom_pol);
	} while (!NT_STATUS_IS_OK(status) && (retry++ < 1) && hnd && hnd->cli && hnd->cli->fd == -1);

	if (!NT_STATUS_IS_OK(status))
		return status;

	do {
		struct acct_info *info2 = NULL;
		uint32 count = 0;
		TALLOC_CTX *mem_ctx2;

		mem_ctx2 = talloc_init("enum_dom_groups[rpc]");

		/* start is updated by this call. */
		status = cli_samr_enum_dom_groups(hnd->cli, mem_ctx2, &dom_pol,
						  &start,
						  0xFFFF, /* buffer size? */
						  &info2, &count);

		if (!NT_STATUS_IS_OK(status) && 
		    !NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
			talloc_destroy(mem_ctx2);
			break;
		}

		(*info) = talloc_realloc(mem_ctx, *info, 
					 sizeof(**info) * ((*num_entries) + count));
		if (! *info) {
			talloc_destroy(mem_ctx2);
			cli_samr_close(hnd->cli, mem_ctx, &dom_pol);
			return NT_STATUS_NO_MEMORY;
		}

		memcpy(&(*info)[*num_entries], info2, count*sizeof(*info2));
		(*num_entries) += count;
		talloc_destroy(mem_ctx2);
	} while (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES));

	cli_samr_close(hnd->cli, mem_ctx, &dom_pol);

	return status;
}

/* List all domain groups */

static NTSTATUS enum_local_groups(struct winbindd_domain *domain,
				TALLOC_CTX *mem_ctx,
				uint32 *num_entries, 
				struct acct_info **info)
{
	uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
	CLI_POLICY_HND *hnd;
	POLICY_HND dom_pol;
	NTSTATUS result;
	int retry;

	*num_entries = 0;
	*info = NULL;

	retry = 0;
	do {
		if ( !NT_STATUS_IS_OK(result = cm_get_sam_handle(domain->name, &hnd)) )
			return result;

		result = cli_samr_open_domain( hnd->cli, mem_ctx, &hnd->pol, 
						des_access, &domain->sid, &dom_pol);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) && hnd && hnd->cli && hnd->cli->fd == -1);

	if ( !NT_STATUS_IS_OK(result))
		return result;

	do {
		struct acct_info *info2 = NULL;
		uint32 count = 0, start = *num_entries;
		TALLOC_CTX *mem_ctx2;

		mem_ctx2 = talloc_init("enum_dom_local_groups[rpc]");

		result = cli_samr_enum_als_groups( hnd->cli, mem_ctx2, &dom_pol,
					  &start, 0xFFFF, &info2, &count);
					  
		if ( !NT_STATUS_IS_OK(result) 
			&& !NT_STATUS_EQUAL(result, STATUS_MORE_ENTRIES) ) 
		{
			talloc_destroy(mem_ctx2);
			break;
		}

		(*info) = talloc_realloc(mem_ctx, *info, 
					 sizeof(**info) * ((*num_entries) + count));
		if (! *info) {
			talloc_destroy(mem_ctx2);
			cli_samr_close(hnd->cli, mem_ctx, &dom_pol);
			return NT_STATUS_NO_MEMORY;
		}

		memcpy(&(*info)[*num_entries], info2, count*sizeof(*info2));
		(*num_entries) += count;
		talloc_destroy(mem_ctx2);
	} while (NT_STATUS_EQUAL(result, STATUS_MORE_ENTRIES));

	cli_samr_close(hnd->cli, mem_ctx, &dom_pol);

	return result;
}

/* convert a single name to a sid in a domain */
static NTSTATUS name_to_sid(struct winbindd_domain *domain,
			    TALLOC_CTX *mem_ctx,
			    const char *name,
			    DOM_SID *sid,
			    enum SID_NAME_USE *type)
{
	CLI_POLICY_HND *hnd;
	NTSTATUS result;
	DOM_SID *sids = NULL;
	uint32 *types = NULL;
	const char *full_name;
	int retry;

	DEBUG(3,("rpc: name_to_sid name=%s\n", name));

	full_name = talloc_asprintf(mem_ctx, "%s\\%s", domain->name, name);
	
	if (!full_name) {
		DEBUG(0, ("talloc_asprintf failed!\n"));
		return NT_STATUS_NO_MEMORY;
	}

	DEBUG(3,("name_to_sid [rpc] %s for domain %s\n", name, domain->name ));

	retry = 0;
	do {
		if (!NT_STATUS_IS_OK(result = cm_get_lsa_handle(domain->name, &hnd))) {
			return result;
		}
        
		result = cli_lsa_lookup_names(hnd->cli, mem_ctx, &hnd->pol, 1, 
					      &full_name, &sids, &types);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) &&
			hnd && hnd->cli && hnd->cli->fd == -1);
        
	/* Return rid and type if lookup successful */

	if (NT_STATUS_IS_OK(result)) {
		sid_copy(sid, &sids[0]);
		*type = types[0];
	}

	return result;
}

/*
  convert a domain SID to a user or group name
*/
static NTSTATUS sid_to_name(struct winbindd_domain *domain,
			    TALLOC_CTX *mem_ctx,
			    DOM_SID *sid,
			    char **name,
			    enum SID_NAME_USE *type)
{
	CLI_POLICY_HND *hnd;
	char **domains;
	char **names;
	uint32 *types;
	NTSTATUS result;
	int retry;

	DEBUG(3,("sid_to_name [rpc] %s for domain %s\n", sid_string_static(sid),
			domain->name ));

	retry = 0;
	do {
		if (!NT_STATUS_IS_OK(result = cm_get_lsa_handle(domain->name, &hnd)))
			return result;
        
		result = cli_lsa_lookup_sids(hnd->cli, mem_ctx, &hnd->pol,
					     1, sid, &domains, &names, &types);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) &&
			hnd && hnd->cli && hnd->cli->fd == -1);

	if (NT_STATUS_IS_OK(result)) {
		*type = types[0];
		*name = names[0];
		DEBUG(5,("Mapped sid to [%s]\\[%s]\n", domains[0], *name));

		/* Paranoia */
		if (strcasecmp(domain->name, domains[0]) != 0) {
			DEBUG(1, ("domain name from domain param and PDC lookup return differ! (%s vs %s)\n", domain->name, domains[0]));
			return NT_STATUS_UNSUCCESSFUL;
		}
	}

	return result;
}

/* Lookup user information from a rid or username. */
static NTSTATUS query_user(struct winbindd_domain *domain, 
			   TALLOC_CTX *mem_ctx, 
			   DOM_SID *user_sid, 
			   WINBIND_USERINFO *user_info)
{
	CLI_POLICY_HND *hnd = NULL;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	POLICY_HND dom_pol, user_pol;
	BOOL got_dom_pol = False, got_user_pol = False;
	SAM_USERINFO_CTR *ctr;
	int retry;
	fstring sid_string;
	uint32 user_rid;
	NET_USER_INFO_3 *user;

	DEBUG(3,("rpc: query_user rid=%s\n", sid_to_string(sid_string, user_sid)));
	if (!sid_peek_check_rid(&domain->sid, user_sid, &user_rid)) {
		goto done;
	}
	
	/* try netsamlogon cache first */
			
	if ( (user = netsamlogon_cache_get( mem_ctx, user_sid )) != NULL ) 
	{
				
		DEBUG(5,("query_user: Cache lookup succeeded for %s\n", 
			sid_string_static(user_sid)));
			
		user_info->user_sid  = rid_to_talloced_sid( domain, mem_ctx, user_rid );
		user_info->group_sid = rid_to_talloced_sid( domain, mem_ctx, user->group_rid );
				
		user_info->acct_name = unistr2_tdup(mem_ctx, &user->uni_user_name);
		user_info->full_name = unistr2_tdup(mem_ctx, &user->uni_full_name);
								
		SAFE_FREE(user);
				
		return NT_STATUS_OK;
	}
	
	/* no cache; hit the wire */
		
	retry = 0;
	do {
		/* Get sam handle; if we fail here there is no hope */
		
		if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(domain->name, &hnd))) 
			goto done;
			
		/* Get domain handle */

		result = cli_samr_open_domain(hnd->cli, mem_ctx, &hnd->pol,
					      SEC_RIGHTS_MAXIMUM_ALLOWED, 
					      &domain->sid, &dom_pol);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) &&
			hnd && hnd->cli && hnd->cli->fd == -1);

	if (!NT_STATUS_IS_OK(result))
		goto done;

	got_dom_pol = True;

	/* Get user handle */
	result = cli_samr_open_user(hnd->cli, mem_ctx, &dom_pol,
				    SEC_RIGHTS_MAXIMUM_ALLOWED, user_rid, &user_pol);

	if (!NT_STATUS_IS_OK(result))
		goto done;

	got_user_pol = True;

	/* Get user info */
	result = cli_samr_query_userinfo(hnd->cli, mem_ctx, &user_pol, 
					 0x15, &ctr);

	if (!NT_STATUS_IS_OK(result))
		goto done;

	cli_samr_close(hnd->cli, mem_ctx, &user_pol);
	got_user_pol = False;

	user_info->user_sid = rid_to_talloced_sid(domain, mem_ctx, user_rid);
	user_info->group_sid = rid_to_talloced_sid(domain, mem_ctx, ctr->info.id21->group_rid);
	user_info->acct_name = unistr2_tdup(mem_ctx, 
					    &ctr->info.id21->uni_user_name);
	user_info->full_name = unistr2_tdup(mem_ctx, 
					    &ctr->info.id21->uni_full_name);

 done:
	/* Clean up policy handles */
	if (got_user_pol)
		cli_samr_close(hnd->cli, mem_ctx, &user_pol);

	if (got_dom_pol)
		cli_samr_close(hnd->cli, mem_ctx, &dom_pol);

	return result;
}                                   

/* Lookup groups a user is a member of.  I wish Unix had a call like this! */
static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
				  TALLOC_CTX *mem_ctx,
				  DOM_SID *user_sid,
				  uint32 *num_groups, DOM_SID ***user_grpsids)
{
	CLI_POLICY_HND *hnd;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	POLICY_HND dom_pol, user_pol;
	uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
	BOOL got_dom_pol = False, got_user_pol = False;
	DOM_GID *user_groups;
	unsigned int i;
	unsigned int retry;
	fstring sid_string;
	uint32 user_rid;
	NET_USER_INFO_3 *user;

	DEBUG(3,("rpc: lookup_usergroups sid=%s\n", sid_to_string(sid_string, user_sid)));

	*num_groups = 0;
	*user_grpsids = NULL;

	/* so lets see if we have a cached user_info_3 */
	
	if ( (user = netsamlogon_cache_get( mem_ctx, user_sid )) != NULL )
	{
		DEBUG(5,("query_user: Cache lookup succeeded for %s\n", 
			sid_string_static(user_sid)));
			
		*num_groups = user->num_groups;
				
		(*user_grpsids) = talloc(mem_ctx, sizeof(DOM_SID*) * (*num_groups));
		for (i=0;i<(*num_groups);i++) {
			(*user_grpsids)[i] = rid_to_talloced_sid(domain, mem_ctx, user->gids[i].g_rid);
		}
				
		SAFE_FREE(user);
				
		return NT_STATUS_OK;
	}

	/* no cache; hit the wire */
	
	retry = 0;
	do {
		/* Get sam handle; if we fail here there is no hope */
		
		if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(domain->name, &hnd))) 		
			goto done;

		/* Get domain handle */
		
		result = cli_samr_open_domain(hnd->cli, mem_ctx, &hnd->pol,
					      des_access, &domain->sid, &dom_pol);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) && 
			hnd && hnd->cli && hnd->cli->fd == -1);

	if (!NT_STATUS_IS_OK(result))
		goto done;

	got_dom_pol = True;


	if (!sid_peek_check_rid(&domain->sid, user_sid, &user_rid)) {
		goto done;
	}

	/* Get user handle */
	result = cli_samr_open_user(hnd->cli, mem_ctx, &dom_pol,
					des_access, user_rid, &user_pol);

	if (!NT_STATUS_IS_OK(result))
		goto done;

	got_user_pol = True;

	/* Query user rids */
	result = cli_samr_query_usergroups(hnd->cli, mem_ctx, &user_pol, 
					   num_groups, &user_groups);

	if (!NT_STATUS_IS_OK(result) || (*num_groups) == 0)
		goto done;

	(*user_grpsids) = talloc(mem_ctx, sizeof(DOM_SID*) * (*num_groups));
	if (!(*user_grpsids)) {
		result = NT_STATUS_NO_MEMORY;
		goto done;
	}

	for (i=0;i<(*num_groups);i++) {
		(*user_grpsids)[i] = rid_to_talloced_sid(domain, mem_ctx, user_groups[i].g_rid);
	}
	
 done:
	/* Clean up policy handles */
	if (got_user_pol)
		cli_samr_close(hnd->cli, mem_ctx, &user_pol);

	if (got_dom_pol)
		cli_samr_close(hnd->cli, mem_ctx, &dom_pol);

	return result;
}


/* Lookup group membership given a rid.   */
static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
				TALLOC_CTX *mem_ctx,
				DOM_SID *group_sid, uint32 *num_names, 
				DOM_SID ***sid_mem, char ***names, 
				uint32 **name_types)
{
        CLI_POLICY_HND *hnd = NULL;
        NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
        uint32 i, total_names = 0;
        POLICY_HND dom_pol, group_pol;
        uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
        BOOL got_dom_pol = False, got_group_pol = False;
	uint32 *rid_mem = NULL;
	uint32 group_rid;
	int retry;
	unsigned int j;
	fstring sid_string;

	DEBUG(10,("rpc: lookup_groupmem %s sid=%s\n", domain->name, sid_to_string(sid_string, group_sid)));

	if (!sid_peek_check_rid(&domain->sid, group_sid, &group_rid)) {
		goto done;
	}

	*num_names = 0;

	retry = 0;
	do {
	        /* Get sam handle */
		if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(domain->name, &hnd)))
			goto done;

		/* Get domain handle */

		result = cli_samr_open_domain(hnd->cli, mem_ctx, &hnd->pol,
				des_access, &domain->sid, &dom_pol);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) && hnd && hnd->cli && hnd->cli->fd == -1);

        if (!NT_STATUS_IS_OK(result))
                goto done;

        got_dom_pol = True;

        /* Get group handle */

        result = cli_samr_open_group(hnd->cli, mem_ctx, &dom_pol,
                                     des_access, group_rid, &group_pol);

        if (!NT_STATUS_IS_OK(result))
                goto done;

        got_group_pol = True;

        /* Step #1: Get a list of user rids that are the members of the
           group. */

        result = cli_samr_query_groupmem(hnd->cli, mem_ctx,
                                         &group_pol, num_names, &rid_mem,
                                         name_types);

        if (!NT_STATUS_IS_OK(result))
                goto done;

        /* Step #2: Convert list of rids into list of usernames.  Do this
           in bunches of ~1000 to avoid crashing NT4.  It looks like there
           is a buffer overflow or something like that lurking around
           somewhere. */

#define MAX_LOOKUP_RIDS 900

        *names = talloc_zero(mem_ctx, *num_names * sizeof(char *));
        *name_types = talloc_zero(mem_ctx, *num_names * sizeof(uint32));
        *sid_mem = talloc_zero(mem_ctx, *num_names * sizeof(DOM_SID *));

	for (j=0;j<(*num_names);j++) {
		(*sid_mem)[j] = rid_to_talloced_sid(domain, mem_ctx, (rid_mem)[j]);
	}
	
	if (*num_names>0 && (!*names || !*name_types)) {
		result = NT_STATUS_NO_MEMORY;
		goto done;
	}

        for (i = 0; i < *num_names; i += MAX_LOOKUP_RIDS) {
                int num_lookup_rids = MIN(*num_names - i, MAX_LOOKUP_RIDS);
                uint32 tmp_num_names = 0;
                char **tmp_names = NULL;
                uint32 *tmp_types = NULL;

                /* Lookup a chunk of rids */

                result = cli_samr_lookup_rids(hnd->cli, mem_ctx,
                                              &dom_pol, 1000, /* flags */
                                              num_lookup_rids,
                                              &rid_mem[i],
                                              &tmp_num_names,
                                              &tmp_names, &tmp_types);

		/* see if we have a real error (and yes the STATUS_SOME_UNMAPPED is
		   the one returned from 2k) */
		
                if (!NT_STATUS_IS_OK(result) && NT_STATUS_V(result) != NT_STATUS_V(STATUS_SOME_UNMAPPED))
                        goto done;
			
                /* Copy result into array.  The talloc system will take
                   care of freeing the temporary arrays later on. */

                memcpy(&(*names)[i], tmp_names, sizeof(char *) * 
                       tmp_num_names);

                memcpy(&(*name_types)[i], tmp_types, sizeof(uint32) *
                       tmp_num_names);
		
                total_names += tmp_num_names;
        }

        *num_names = total_names;

 	result = NT_STATUS_OK;
	
done:
        if (got_group_pol)
                cli_samr_close(hnd->cli, mem_ctx, &group_pol);

        if (got_dom_pol)
                cli_samr_close(hnd->cli, mem_ctx, &dom_pol);

        return result;
}

#ifdef HAVE_LDAP

#include <ldap.h>

static SIG_ATOMIC_T gotalarm;

/***************************************************************
 Signal function to tell us we timed out.
****************************************************************/

static void gotalarm_sig(void)
{
	gotalarm = 1;
}

static LDAP *ldap_open_with_timeout(const char *server, int port, unsigned int to)
{
	LDAP *ldp = NULL;

	/* Setup timeout */
	gotalarm = 0;
	CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
	alarm(to);
	/* End setup timeout. */

	ldp = ldap_open(server, port);

	/* Teardown timeout. */
	CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
	alarm(0);

	return ldp;
}

static int get_ldap_seq(const char *server, int port, uint32 *seq)
{
	int ret = -1;
	struct timeval to;
	char *attrs[] = {"highestCommittedUSN", NULL};
	LDAPMessage *res = NULL;
	char **values = NULL;
	LDAP *ldp = NULL;

	*seq = DOM_SEQUENCE_NONE;

	/*
	 * 10 second timeout on open. This is needed as the search timeout
	 * doesn't seem to apply to doing an open as well. JRA.
	 */

	if ((ldp = ldap_open_with_timeout(server, port, 10)) == NULL)
		return -1;

	/* Timeout if no response within 20 seconds. */
	to.tv_sec = 10;
	to.tv_usec = 0;

	if (ldap_search_st(ldp, "", LDAP_SCOPE_BASE, "(objectclass=*)", &attrs[0], 0, &to, &res))
		goto done;

	if (ldap_count_entries(ldp, res) != 1)
		goto done;

	values = ldap_get_values(ldp, res, "highestCommittedUSN");
	if (!values || !values[0])
		goto done;

	*seq = atoi(values[0]);
	ret = 0;

  done:

	if (values)
		ldap_value_free(values);
	if (res)
		ldap_msgfree(res);
	if (ldp)
		ldap_unbind(ldp);
	return ret;
}

/**********************************************************************
 Get the sequence number for a Windows AD native mode domain using
 LDAP queries
**********************************************************************/

int get_ldap_sequence_number( const char* domain, uint32 *seq)
{
	int ret = -1;
	int i, port = LDAP_PORT;
	struct ip_service *ip_list = NULL;
	int count;
	
	if ( !get_sorted_dc_list(domain, &ip_list, &count, False) ) {
		DEBUG(3, ("Could not look up dc's for domain %s\n", domain));
		return False;
	}

	/* Finally return first DC that we can contact */

	for (i = 0; i < count; i++) {
		fstring ipstr;

		/* since the is an LDAP lookup, default to the LDAP_PORT is not set */
		port = (ip_list[i].port!= PORT_NONE) ? ip_list[i].port : LDAP_PORT;

		fstrcpy( ipstr, inet_ntoa(ip_list[i].ip) );
		
		if (is_zero_ip(ip_list[i].ip))
			continue;

		if ( (ret = get_ldap_seq( ipstr, port,  seq)) == 0 )
			goto done;

		/* add to failed connection cache */
		add_failed_connection_entry( domain, ipstr, NT_STATUS_UNSUCCESSFUL );
	}

done:
	if ( ret == 0 ) {
		DEBUG(3, ("get_ldap_sequence_number: Retrieved sequence number for Domain (%s) from DC (%s:%d)\n", 
			domain, inet_ntoa(ip_list[i].ip), port));
	}

	SAFE_FREE(ip_list);

	return ret;
}

#endif /* HAVE_LDAP */

/* find the sequence number for a domain */
static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
{
	TALLOC_CTX *mem_ctx;
	CLI_POLICY_HND *hnd;
	SAM_UNK_CTR ctr;
	uint16 switch_value = 2;
	NTSTATUS result;
	POLICY_HND dom_pol;
	BOOL got_dom_pol = False;
	uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
	int retry;

	DEBUG(10,("rpc: fetch sequence_number for %s\n", domain->name));

	*seq = DOM_SEQUENCE_NONE;

	if (!(mem_ctx = talloc_init("sequence_number[rpc]")))
		return NT_STATUS_NO_MEMORY;

	retry = 0;
	do {
#ifdef HAVE_LDAP
		if ( domain->native_mode ) 
		{
			DEBUG(8,("using get_ldap_seq() to retrieve the sequence number\n"));

			if ( get_ldap_sequence_number( domain->name, seq ) == 0 ) {			
				result = NT_STATUS_OK;
				DEBUG(10,("domain_sequence_number: LDAP for domain %s is %u\n",
					domain->name, *seq));
				goto done;
			}

			DEBUG(10,("domain_sequence_number: failed to get LDAP sequence number for domain %s\n",
			domain->name ));
		}
#endif /* HAVE_LDAP */
	        /* Get sam handle */
		if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(domain->name, &hnd)))
			goto done;

		/* Get domain handle */
		result = cli_samr_open_domain(hnd->cli, mem_ctx, &hnd->pol, 
				      des_access, &domain->sid, &dom_pol);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) && hnd && hnd->cli && hnd->cli->fd == -1);

	if (!NT_STATUS_IS_OK(result))
		goto done;

	got_dom_pol = True;

	/* Query domain info */

	result = cli_samr_query_dom_info(hnd->cli, mem_ctx, &dom_pol,
					 switch_value, &ctr);

	if (NT_STATUS_IS_OK(result)) {
		*seq = ctr.info.inf2.seq_num;
		DEBUG(10,("domain_sequence_number: for domain %s is %u\n", domain->name, (unsigned)*seq));
	} else {
		DEBUG(10,("domain_sequence_number: failed to get sequence number (%u) for domain %s\n",
			(unsigned)*seq, domain->name ));
	}

  done:

	if (got_dom_pol)
		cli_samr_close(hnd->cli, mem_ctx, &dom_pol);

	talloc_destroy(mem_ctx);

	return result;
}

/* get a list of trusted domains */
static NTSTATUS trusted_domains(struct winbindd_domain *domain,
				TALLOC_CTX *mem_ctx,
				uint32 *num_domains,
				char ***names,
				char ***alt_names,
				DOM_SID **dom_sids)
{
	CLI_POLICY_HND *hnd;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	uint32 enum_ctx = 0;
	int retry;

	DEBUG(3,("rpc: trusted_domains\n"));

	*num_domains = 0;
	*alt_names = NULL;

	retry = 0;
	do {
		if (!NT_STATUS_IS_OK(result = cm_get_lsa_handle(lp_workgroup(), &hnd)))
			goto done;

		result = cli_lsa_enum_trust_dom(hnd->cli, mem_ctx,
						&hnd->pol, &enum_ctx,
						num_domains, names, dom_sids);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) &&  hnd && hnd->cli && hnd->cli->fd == -1);

done:
	return result;
}

/* find the domain sid for a domain */
static NTSTATUS domain_sid(struct winbindd_domain *domain, DOM_SID *sid)
{
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	TALLOC_CTX *mem_ctx;
	CLI_POLICY_HND *hnd;
	fstring level5_dom;
	int retry;

	DEBUG(3,("rpc: domain_sid\n"));

	if (!(mem_ctx = talloc_init("domain_sid[rpc]")))
		return NT_STATUS_NO_MEMORY;

	retry = 0;
	do {
		/* Get lsa handle */
		if (!NT_STATUS_IS_OK(result = cm_get_lsa_handle(domain->name, &hnd)))
			goto done;

		result = cli_lsa_query_info_policy(hnd->cli, mem_ctx,
					   &hnd->pol, 0x05, level5_dom, sid);
	} while (!NT_STATUS_IS_OK(result) && (retry++ < 1) &&  hnd && hnd->cli && hnd->cli->fd == -1);

done:
	talloc_destroy(mem_ctx);
	return result;
}

/* find alternate names list for the domain - none for rpc */
static NTSTATUS alternate_name(struct winbindd_domain *domain)
{
	return NT_STATUS_OK;
}


/* the rpc backend methods are exposed via this structure */
struct winbindd_methods msrpc_methods = {
	False,
	query_user_list,
	enum_dom_groups,
	enum_local_groups,
	name_to_sid,
	sid_to_name,
	query_user,
	lookup_usergroups,
	lookup_groupmem,
	sequence_number,
	trusted_domains,
	domain_sid,
	alternate_name
};