summaryrefslogtreecommitdiff
path: root/source3/nsswitch/winbindd_group.c
blob: e65d2bc29e72fa69f6ea4c515f6d93c359f39f18 (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
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
/* 
   Unix SMB/Netbios implementation.
   Version 2.2.

   Winbind daemon for ntdom nss module

   Copyright (C) Tim Potter 2000
   Copyright (C) Jeremy Allison 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"

/***************************************************************
 Empty static struct for negative caching.
****************************************************************/

static struct winbindd_gr negative_gr_cache_entry;

/* Fill a grent structure from various other information */

static BOOL fill_grent(struct winbindd_gr *gr, char *gr_name,
		       gid_t unix_gid)
{
	/* Fill in uid/gid */

	gr->gr_gid = unix_gid;
    
	/* Group name and password */
    
	safe_strcpy(gr->gr_name, gr_name, sizeof(gr->gr_name) - 1);
	safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);

	return True;
}

/* Fill in the group membership field of a NT group given by group_rid */

static BOOL fill_grent_mem(struct winbindd_domain *domain,
			   uint32 group_rid, 
			   enum SID_NAME_USE group_name_type, 
			   int *num_gr_mem, char **gr_mem, int *gr_mem_len)
{
	uint32 *rid_mem = NULL, num_names = 0;
	uint32 *name_types = NULL;
	int buf_len, buf_ndx, i;
	char **names = NULL, *buf;
	BOOL result = False;
	TALLOC_CTX *mem_ctx;

	if (!(mem_ctx = talloc_init()))
		return False;

	/* Initialise group membership information */
	
	DEBUG(10, ("fill_grent_mem(): group %s rid 0x%x\n",
		   domain ? domain->name : "NULL", group_rid));

	*num_gr_mem = 0;
	
	if (group_name_type != SID_NAME_DOM_GRP) {
		DEBUG(1, ("fill_grent_mem(): rid %d in domain %s isn't a "
			  "domain group\n", group_rid, domain->name));
                goto done;
	}

	/* Lookup group members */

	if (!winbindd_lookup_groupmem(domain, mem_ctx, group_rid, &num_names, 
				      &rid_mem, &names, &name_types)) {

		DEBUG(1, ("fill_grent_mem(): could not lookup membership "
			  "for group rid %d in domain %s\n", 
			  group_rid, domain->name));

		goto done;
	}

	DEBUG(10, ("fill_grent_mem(): looked up %d names\n", num_names));

	if (DEBUGLEVEL >= 10) {
		for (i = 0; i < num_names; i++)
			DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
				   name_types[i]));
	}

	/* Add members to list */

	buf = NULL;
	buf_len = buf_ndx = 0;

 again:

	for (i = 0; i < num_names; i++) {
		char *the_name;
		fstring name;
		int len;
			
		the_name = names[i];

		DEBUG(10, ("fill_grent_mem(): processing name %s\n", 
                           the_name));

		/* FIXME: need to cope with groups within groups.  These
                   occur in Universal groups on a Windows 2000 native mode
                   server. */

		if (name_types[i] != SID_NAME_USER) {
			DEBUG(3, ("fill_grent_mem(): name %s isn't a domain "
				  "user\n", the_name));
			continue;
		}

		/* Don't bother with machine accounts */
		
		if (the_name[strlen(the_name) - 1] == '$') {
			DEBUG(10, ("fill_grent_mem(): %s is machine account\n",
				   the_name));
			continue;
		}

		/* Append domain name */

		snprintf(name, sizeof(name), "%s%s%s", domain->name,
			 lp_winbind_separator(), the_name);

		len = strlen(name);
		
		/* Add to list or calculate buffer length */

		if (!buf) {
			buf_len += len + 1; /* List is comma separated */
			(*num_gr_mem)++;
			DEBUG(10, ("fill_grent_mem(): buf_len + %d = %d\n", len + 1,
				   buf_len));
		} else {
			DEBUG(10, ("fill_grent_mem(): appending %s at index %d\n",
				   name, len));
			safe_strcpy(&buf[buf_ndx], name, len);
			buf_ndx += len;
			buf[buf_ndx] = ',';
			buf_ndx++;
		}
	}

	/* Allocate buffer */

	if (!buf) {
		if (!(buf = malloc(buf_len))) {
			DEBUG(1, ("fill_grent_mem(): out of memory\n"));
			result = False;
			goto done;
		}
		memset(buf, 0, buf_len);
		goto again;
	}

	if (buf && buf_ndx > 0) {
		buf[buf_ndx - 1] = '\0';
	}

	*gr_mem = buf;
	*gr_mem_len = buf_len;

	DEBUG(10, ("fill_grent_mem(): num_mem = %d, len = %d, mem = %s\n", 
                   *num_gr_mem, buf_len, num_gr_mem ? buf : "NULL"));

	result = True;

done:

	talloc_destroy(mem_ctx);
	
	DEBUG(10, ("fill_grent_mem(): returning %d\n", result));

	return result;
}

/* Return a group structure from a group name */

enum winbindd_result winbindd_getgrnam_from_group(struct winbindd_cli_state *state)
{
	DOM_SID group_sid;
	struct winbindd_domain *domain;
	enum SID_NAME_USE name_type;
	uint32 group_rid;
	fstring name_domain, name_group, name;
	char *tmp, *gr_mem;
	gid_t gid;
	int extra_data_len, gr_mem_len;
	
	DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
		  state->request.data.groupname));

	/* Parse domain and groupname */
	
	memset(name_group, 0, sizeof(fstring));

	tmp = state->request.data.groupname;
	parse_domain_user(tmp, name_domain, name_group);

	/* Reject names that don't have a domain - i.e name_domain contains 
	   the entire name. */

	if (strequal(name_group, ""))
		return WINBINDD_ERROR;

	/* Get info for the domain */

	if ((domain = find_domain_from_name(name_domain)) == NULL) {
		DEBUG(0, ("getgrname_from_group(): could not get domain "
			  "sid for domain %s\n", name_domain));
		return WINBINDD_ERROR;
	}

	/* Check for cached group entry */

	if (winbindd_fetch_group_cache_entry(domain, name_group,
					     &state->response.data.gr,
					     &state->response.extra_data,
					     &extra_data_len)) {

		/* Check if this is a negative cache entry. */

		if (memcmp(&negative_gr_cache_entry, &state->response.data.gr,
				sizeof(state->response.data.gr)) == 0)
            return WINBINDD_ERROR;

		state->response.length += extra_data_len;
		return WINBINDD_OK;
	}

	snprintf(name, sizeof(name), "%s\\%s", name_domain, name_group);

	/* Get rid and name type from name */
        
	if (!winbindd_lookup_sid_by_name(name, &group_sid, &name_type)) {
		DEBUG(1, ("group %s in domain %s does not exist\n", 
			  name_group, name_domain));

		winbindd_store_group_cache_entry(domain, name_group, 
					 &negative_gr_cache_entry, NULL, 0);

		return WINBINDD_ERROR;
	}

	if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
		DEBUG(1, ("from_group: name '%s' is not a local or domain "
			  "group: %d\n", name_group, name_type));

		winbindd_store_group_cache_entry(domain, name_group, 
					 &negative_gr_cache_entry, NULL, 0);

		return WINBINDD_ERROR;
	}

	/* Fill in group structure */

	sid_split_rid(&group_sid, &group_rid);

	if (!winbindd_idmap_get_gid_from_rid(domain->name, group_rid, &gid)) {
		DEBUG(1, ("error sursing unix gid for sid\n"));

		winbindd_store_group_cache_entry(domain, name_group, 
					 &negative_gr_cache_entry, NULL, 0);

		return WINBINDD_ERROR;
	}

	if (!fill_grent(&state->response.data.gr, 
			state->request.data.groupname, gid) ||
	    !fill_grent_mem(domain, group_rid, name_type,
			    &state->response.data.gr.num_gr_mem,
			    &gr_mem, &gr_mem_len)) {

		winbindd_store_group_cache_entry(domain, name_group, 
					 &negative_gr_cache_entry, NULL, 0);

		return WINBINDD_ERROR;
	}

	/* Group membership lives at start of extra data */

	state->response.data.gr.gr_mem_ofs = 0;

	state->response.length += gr_mem_len;
	state->response.extra_data = gr_mem;

	/* Update cached group info */

	winbindd_store_group_cache_entry(domain, name_group, 
					 &state->response.data.gr,
					 state->response.extra_data,
					 gr_mem_len);

	return WINBINDD_OK;
}

/* Return a group structure from a gid number */

enum winbindd_result winbindd_getgrnam_from_gid(struct winbindd_cli_state 
                                                *state)
{
	struct winbindd_domain *domain;
	DOM_SID group_sid;
	enum SID_NAME_USE name_type;
	fstring group_name;
	uint32 group_rid;
	int extra_data_len, gr_mem_len;
	char *gr_mem;

	DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid, 
		  state->request.data.gid));

	/* Bug out if the gid isn't in the winbind range */

	if ((state->request.data.gid < server_state.gid_low) ||
	    (state->request.data.gid > server_state.gid_high))
		return WINBINDD_ERROR;

	/* Get rid from gid */

	if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid, 
					     &group_rid, &domain)) {
		DEBUG(1, ("Could not convert gid %d to rid\n", 
			  state->request.data.gid));
		return WINBINDD_ERROR;
	}

	/* Try a cached entry */

	if (winbindd_fetch_gid_cache_entry(domain, 
					   state->request.data.gid,
					   &state->response.data.gr,
					   &state->response.extra_data,
					   &extra_data_len)) {

		/* Check if this is a negative cache entry. */

		if (memcmp(&negative_gr_cache_entry, &state->response.data.gr,
				sizeof(state->response.data.gr)) == 0)
            return WINBINDD_ERROR;

		state->response.length += extra_data_len;
		return WINBINDD_OK;
	}

	/* Get sid from gid */

	sid_copy(&group_sid, &domain->sid);
	sid_append_rid(&group_sid, group_rid);

	if (!winbindd_lookup_name_by_sid(&group_sid, group_name, &name_type)) {
		DEBUG(1, ("Could not lookup sid\n"));
		return WINBINDD_ERROR;
	}

	if (strcmp(lp_winbind_separator(),"\\"))
		string_sub(group_name, "\\", lp_winbind_separator(), 
			   sizeof(fstring));

	if (!((name_type == SID_NAME_ALIAS) || 
	      (name_type == SID_NAME_DOM_GRP))) {
		DEBUG(1, ("from_gid: name '%s' is not a local or domain "
			  "group: %d\n", group_name, name_type));
		return WINBINDD_ERROR;
	}

	/* Fill in group structure */

	if (!fill_grent(&state->response.data.gr, group_name, 
			state->request.data.gid) ||
	    !fill_grent_mem(domain, group_rid, name_type,
			    &state->response.data.gr.num_gr_mem,
			    &gr_mem, &gr_mem_len))
		return WINBINDD_ERROR;

	/* Group membership lives at start of extra data */

	state->response.data.gr.gr_mem_ofs = 0;

	state->response.length += gr_mem_len;
	state->response.extra_data = gr_mem;

	/* Update cached group info */

	winbindd_store_gid_cache_entry(domain, state->request.data.gid,
				       &state->response.data.gr,
				       state->response.extra_data,
				       gr_mem_len);

	return WINBINDD_OK;
}

/*
 * set/get/endgrent functions
 */

/* "Rewind" file pointer for group database enumeration */

enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
{
	struct winbindd_domain *tmp;

	DEBUG(3, ("[%5d]: setgrent\n", state->pid));

	/* Check user has enabled this */

	if (!lp_winbind_enum_groups())
		return WINBINDD_ERROR;

	/* Free old static data if it exists */
	
	if (state->getgrent_state != NULL) {
		free_getent_state(state->getgrent_state);
		state->getgrent_state = NULL;
	}
	
	/* Create sam pipes for each domain we know about */
	
	if (domain_list == NULL)
		get_domain_info();

	for (tmp = domain_list; tmp != NULL; tmp = tmp->next) {
		struct getent_state *domain_state;
		
		/* Skip domains other than WINBINDD_DOMAIN environment 
		   variable */
		
		if ((strcmp(state->request.domain, "") != 0) &&
		    !check_domain_env(state->request.domain, tmp->name))
			continue;
		
		/* Create a state record for this domain */
		
		if ((domain_state = (struct getent_state *)
		     malloc(sizeof(struct getent_state))) == NULL)
			return WINBINDD_ERROR;
		
		ZERO_STRUCTP(domain_state);
		
		domain_state->domain = tmp;

		/* Add to list of open domains */
		
		DLIST_ADD(state->getgrent_state, domain_state);
	}
	
	return WINBINDD_OK;
}

/* Close file pointer to ntdom group database */

enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
{
	DEBUG(3, ("[%5d]: endgrent\n", state->pid));

	free_getent_state(state->getgrent_state);
	state->getgrent_state = NULL;
	
	return WINBINDD_OK;
}

/* Get the list of domain groups and domain aliases for a domain.  We fill in
   the sam_entries and num_sam_entries fields with domain group information.  
   The dispinfo_ndx field is incremented to the index of the next group to 
   fetch. Return True if some groups were returned, False otherwise. */

#define MAX_FETCH_SAM_ENTRIES 100

static BOOL get_sam_group_entries(struct getent_state *ent)
{
	NTSTATUS status;
	uint32 num_entries;
	struct acct_info *name_list = NULL, *tnl;
	TALLOC_CTX *mem_ctx;
	BOOL result = False;
        
	if (ent->got_all_sam_entries)
		return False;

#if 0
	if (winbindd_fetch_group_cache(ent->domain, 
				       &ent->sam_entries,
				       &ent->num_sam_entries))
		return True;
#endif

	if (!(mem_ctx = talloc_init()))
		return False;
		
	/* Free any existing group info */

	SAFE_FREE(ent->sam_entries);
	ent->num_sam_entries = 0;
		
	/* Enumerate domain groups */
		
	do {
		struct acct_info *sam_grp_entries = NULL;
		uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
		CLI_POLICY_HND *hnd;
		POLICY_HND dom_pol;

		num_entries = 0;

		if (!(hnd = cm_get_sam_handle(ent->domain->name)))
			break;

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

		if (!NT_STATUS_IS_OK(status))
			break;

		status = cli_samr_enum_dom_groups(
						hnd->cli, mem_ctx, &dom_pol,
						&ent->grp_query_start_ndx,
						0x8000, /* buffer size? */
						(struct acct_info **) &sam_grp_entries, &num_entries);

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

		/* Copy entries into return buffer */

		if (num_entries) {

			tnl = Realloc(name_list,
				    sizeof(struct acct_info) *
				    (ent->num_sam_entries +
				     num_entries));

			if (tnl == NULL) {
				DEBUG(0,("get_sam_group_entries: unable to "
                                         "realloc a structure!\n"));
				SAFE_FREE(name_list);

				goto done;
			} else 
				name_list = tnl;

			memcpy(&name_list[ent->num_sam_entries],
			       sam_grp_entries, 
			       num_entries * sizeof(struct acct_info));
		}

		ent->num_sam_entries += num_entries;
		
		if (NT_STATUS_V(status) != NT_STATUS_V(STATUS_MORE_ENTRIES))
			break;

	} while (ent->num_sam_entries < MAX_FETCH_SAM_ENTRIES);
		
#if 0
	/* Fill cache with received entries */

	winbindd_store_group_cache(ent->domain, ent->sam_entries,
				   ent->num_sam_entries);
#endif

	/* Fill in remaining fields */

	ent->sam_entries = name_list;
	ent->sam_entry_index = 0;
	ent->got_all_sam_entries = (NT_STATUS_V(status) != 
                                    NT_STATUS_V(STATUS_MORE_ENTRIES));

	result = (ent->num_sam_entries > 0);

 done:

	talloc_destroy(mem_ctx);

	return result;
}

/* Fetch next group entry from ntdom database */

#define MAX_GETGRENT_GROUPS 500

enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
{
	struct getent_state *ent;
	struct winbindd_gr *group_list = NULL;
	int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
	char *sep, *new_extra_data, *gr_mem_list = NULL;

	DEBUG(3, ("[%5d]: getgrent\n", state->pid));

	/* Check user has enabled this */

	if (!lp_winbind_enum_groups())
		return WINBINDD_ERROR;

	num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);

	if ((state->response.extra_data = 
	     malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
		return WINBINDD_ERROR;

	state->response.data.num_entries = 0;

	group_list = (struct winbindd_gr *)state->response.extra_data;
	sep = lp_winbind_separator();

	if (!(ent = state->getgrent_state))
		return WINBINDD_ERROR;

	/* Start sending back groups */

	for (i = 0; i < num_groups; i++) {
		struct acct_info *name_list = NULL;
		fstring domain_group_name;
		uint32 result;
		gid_t group_gid;
		
		/* Do we need to fetch another chunk of groups? */

	tryagain:

		DEBUG(10, ("getgrent(): entry_index = %d, num_entries = %d\n",
			   ent->sam_entry_index, ent->num_sam_entries));

		if (ent->num_sam_entries == ent->sam_entry_index) {

			while(ent && !get_sam_group_entries(ent)) {
				struct getent_state *next_ent;

				DEBUG(10, ("getgrent(): freeing state info for "
					   "domain %s\n", ent->domain->name)); 

				/* Free state information for this domain */

				SAFE_FREE(ent->sam_entries);

				next_ent = ent->next;
				DLIST_REMOVE(state->getgrent_state, ent);
				
				SAFE_FREE(ent);
				ent = next_ent;
			}

			/* No more domains */

			if (!ent) 
                                break;
		}
		
		name_list = ent->sam_entries;
		
		/* Lookup group info */
		
		if (!winbindd_idmap_get_gid_from_rid(
			ent->domain->name,
			name_list[ent->sam_entry_index].rid,
			&group_gid)) {
			
			DEBUG(1, ("getgrent(): could not look up gid for group %s\n",
				  name_list[ent->sam_entry_index].acct_name));

			ent->sam_entry_index++;
			goto tryagain;
		}

		DEBUG(10, ("getgrent(): got gid %d for group %x\n", group_gid,
			   name_list[ent->sam_entry_index].rid));
		
		/* Fill in group entry */

		slprintf(domain_group_name, sizeof(domain_group_name) - 1,
			 "%s%s%s", ent->domain->name, lp_winbind_separator(), 
			 name_list[ent->sam_entry_index].acct_name);
   
		result = fill_grent(&group_list[group_list_ndx], 
				    domain_group_name, group_gid);

		/* Fill in group membership entry */

		if (result) {
			int gr_mem_len;
			char *gr_mem, *new_gr_mem_list;

			/* Get group membership */

			result = fill_grent_mem(
				ent->domain,
				name_list[ent->sam_entry_index].rid,
				SID_NAME_DOM_GRP,
				&group_list[group_list_ndx].num_gr_mem, 
				&gr_mem, &gr_mem_len);

			/* Append to group membership list */

			new_gr_mem_list = Realloc(
				gr_mem_list,
				gr_mem_list_len + gr_mem_len);

			if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
				DEBUG(0, ("getgrent(): out of memory\n"));
				SAFE_FREE(gr_mem_list);
				gr_mem_list_len = 0;
				break;
			}

			DEBUG(10, ("getgrent(): list_len = %d, mem_len = %d\n",
				   gr_mem_list_len, gr_mem_len));

			gr_mem_list = new_gr_mem_list;

			memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
			       gr_mem_len);

			SAFE_FREE(gr_mem);

			group_list[group_list_ndx].gr_mem_ofs = 
				gr_mem_list_len;

			gr_mem_list_len += gr_mem_len;
		}

		ent->sam_entry_index++;
		
		/* Add group to return list */
		
		if (result) {

			DEBUG(10, ("getgrent(): adding group num_entries = %d\n",
				   state->response.data.num_entries));

			group_list_ndx++;
			state->response.data.num_entries++;
			
			state->response.length +=
				sizeof(struct winbindd_gr);
			
		} else {
			DEBUG(0, ("could not lookup domain group %s\n", 
				  domain_group_name));
		}
	}

	/* Copy the list of group memberships to the end of the extra data */

	if (group_list_ndx == 0)
		goto done;

	new_extra_data = Realloc(
		state->response.extra_data,
		group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);

	if (!new_extra_data) {
		DEBUG(0, ("out of memory\n"));
		group_list_ndx = 0;
		SAFE_FREE(state->response.extra_data);
		SAFE_FREE(gr_mem_list);

		return WINBINDD_ERROR;
	}

	state->response.extra_data = new_extra_data;

	memcpy(&((char *)state->response.extra_data)
	       [group_list_ndx * sizeof(struct winbindd_gr)], 
	       gr_mem_list, gr_mem_list_len);

       	SAFE_FREE(gr_mem_list);

	state->response.length += gr_mem_list_len;

	DEBUG(10, ("getgrent(): returning %d groups, length = %d\n",
		   group_list_ndx, gr_mem_list_len));

	/* Out of domains */

 done:

	return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
}

/* List domain groups without mapping to unix ids */

enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
{
	uint32 total_entries = 0;
	uint32 num_domain_entries;
	struct winbindd_domain *domain;
	struct getent_state groups;
	char *extra_data = NULL;
	char *ted = NULL;
	int extra_data_len = 0, i;
	void *sam_entries = NULL;

	DEBUG(3, ("[%5d]: list groups\n", state->pid));

	/* Enumerate over trusted domains */

	ZERO_STRUCT(groups);

	if (domain_list == NULL)
		get_domain_info();

	for (domain = domain_list; domain; domain = domain->next) {

		/* Skip domains other than WINBINDD_DOMAIN environment
		   variable */ 

		if ((strcmp(state->request.domain, "") != 0) &&
		    !check_domain_env(state->request.domain, domain->name))
			continue;

		/* Get list of sam groups */

		ZERO_STRUCT(groups);
		groups.domain = domain;

		/* 
		 * iterate through all groups 
		 * total_entries:  maintains a total count over **all domains**
		 * num_domain_entries:  is the running count for this domain
		 */
		 
		num_domain_entries = 0;

		while (get_sam_group_entries(&groups)) {
			int new_size;
			int offset;
			
			offset = sizeof(struct acct_info) * num_domain_entries;
			new_size = sizeof(struct acct_info) 
			 	* (groups.num_sam_entries + num_domain_entries);
			sam_entries = Realloc(sam_entries, new_size);
			
			if (!sam_entries)
				return WINBINDD_ERROR;
			
			num_domain_entries += groups.num_sam_entries;
			memcpy (((char *)sam_entries)+offset, 
                                groups.sam_entries, 
				sizeof(struct acct_info) * 
                                groups.num_sam_entries);
			
			groups.sam_entries = NULL;
			groups.num_sam_entries = 0;
		}

		/* skip remainder of loop if we idn;t retrieve any groups */
		
		if (num_domain_entries == 0) 
			continue;

		/* setup the groups struct to contain all the groups 
		   retrieved for this domain */
		  
		groups.num_sam_entries = num_domain_entries;
		groups.sam_entries = sam_entries;

		/* keep track the of the total number of groups seen so 
		   far over all domains */

		total_entries += groups.num_sam_entries;
		
		/* Allocate some memory for extra data.  Note that we limit
		   account names to sizeof(fstring) = 128 characters.  */
		
                ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 
		if (!ted) {
			DEBUG(0,("winbindd_list_groups: failed to enlarge "
                                 "buffer!\n"));
			SAFE_FREE(extra_data);
			return WINBINDD_ERROR;
		} else
			extra_data = ted;

		/* Pack group list into extra data fields */

		for (i = 0; i < groups.num_sam_entries; i++) {
			char *group_name = ((struct acct_info *)
					    groups.sam_entries)[i].acct_name; 
			fstring name;

			/* Convert unistring to ascii */

			snprintf(name, sizeof(name), "%s%s%s", domain->name, 
				lp_winbind_separator(), group_name);

			/* Append to extra data */
			
			memcpy(&extra_data[extra_data_len], name, 
                               strlen(name));

			extra_data_len += strlen(name);

			extra_data[extra_data_len++] = ',';
		}
	}

	/* Assign extra_data fields in response structure */

	if (extra_data) {
		extra_data[extra_data_len - 1] = '\0';
		state->response.extra_data = extra_data;
		state->response.length += extra_data_len;
	}

	/* No domains may have responded but that's still OK so don't
	   return an error. */

	return WINBINDD_OK;
}

/* Get user supplementary groups.  This is much quicker than trying to
   invert the groups database. */

enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
{
	fstring name_domain, name_user, name;
	DOM_SID user_sid;
	enum SID_NAME_USE name_type;
	uint32 user_rid, num_groups, num_gids;
	DOM_GID *user_groups = NULL;
	struct winbindd_domain *domain;
	enum winbindd_result result = WINBINDD_ERROR;
	gid_t *gid_list;
	int i;
	TALLOC_CTX *mem_ctx;
	
	DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
		  state->request.data.username));

	if (!(mem_ctx = talloc_init()))
		return WINBINDD_ERROR;

	/* Parse domain and username */

	parse_domain_user(state->request.data.username, name_domain, 
			  name_user);

	/* Reject names that don't have a domain - i.e name_domain contains 
	   the entire name. */
 
	if (strequal(name_domain, ""))
		goto done;

	/* Get info for the domain */
	
	if ((domain = find_domain_from_name(name_domain)) == NULL) {
		DEBUG(0, ("could not find domain entry for domain %s\n", 
			  name_domain));
		goto done;
	}

	slprintf(name, sizeof(name) - 1, "%s\\%s", name_domain, name_user);
	
	/* Get rid and name type from name.  The following costs 1 packet */

	if (!winbindd_lookup_sid_by_name(name, &user_sid, &name_type)) {
		DEBUG(1, ("user '%s' does not exist\n", name_user));
		goto done;
	}

	if (name_type != SID_NAME_USER) {
		DEBUG(1, ("name '%s' is not a user name: %d\n", name_user, 
			  name_type));
		goto done;
	}

	sid_split_rid(&user_sid, &user_rid);

	if (!winbindd_lookup_usergroups(domain, mem_ctx, user_rid, 
                                        &num_groups, &user_groups))
		goto done;

	/* Copy data back to client */

	num_gids = 0;
	gid_list = malloc(sizeof(gid_t) * num_groups);

	if (state->response.extra_data)
		goto done;

	for (i = 0; i < num_groups; i++) {
		if (!winbindd_idmap_get_gid_from_rid(
			domain->name, user_groups[i].g_rid, 
			&gid_list[num_gids])) {

			DEBUG(1, ("unable to convert group rid %d to gid\n", 
				  user_groups[i].g_rid));
			continue;
		}
			
		num_gids++;
	}

	state->response.data.num_entries = num_gids;
	state->response.extra_data = gid_list;
	state->response.length += num_gids * sizeof(gid_t);

	result = WINBINDD_OK;

 done:

	talloc_destroy(mem_ctx);

	return result;
}