summaryrefslogtreecommitdiffstats
path: root/source3/winbindd/idmap_ad.c
blob: 0d7c068844697f7564d7d4f30a9885e51f0b8dc0 (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
/*
 *  idmap_ad: map between Active Directory and RFC 2307 or "Services for Unix" (SFU) Accounts
 *
 * Unix SMB/CIFS implementation.
 *
 * Winbind ADS backend functions
 *
 * Copyright (C) Andrew Tridgell 2001
 * Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003
 * Copyright (C) Gerald (Jerry) Carter 2004-2007
 * Copyright (C) Luke Howard 2001-2004
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include "includes.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP

#define WINBIND_CCACHE_NAME "MEMORY:winbind_ccache"

#define IDMAP_AD_MAX_IDS 30
#define CHECK_ALLOC_DONE(mem) do { \
     if (!mem) { \
           DEBUG(0, ("Out of memory!\n")); \
           ret = NT_STATUS_NO_MEMORY; \
           goto done; \
      } \
} while (0)

struct idmap_ad_context {
	uint32_t filter_low_id;
	uint32_t filter_high_id;
};

NTSTATUS init_module(void);

static ADS_STRUCT *ad_idmap_ads = NULL;
static struct posix_schema *ad_schema = NULL;
static enum wb_posix_mapping ad_map_type = WB_POSIX_MAP_UNKNOWN;

/************************************************************************
 ***********************************************************************/

static ADS_STRUCT *ad_idmap_cached_connection_internal(void)
{
	ADS_STRUCT *ads;
	ADS_STATUS status;
	bool local = False;
	fstring dc_name;
	struct sockaddr_storage dc_ip;

	if (ad_idmap_ads != NULL) {

		time_t expire;
		time_t now = time(NULL);

		ads = ad_idmap_ads;

		expire = MIN(ads->auth.tgt_expire, ads->auth.tgs_expire);

		/* check for a valid structure */
		DEBUG(7, ("Current tickets expire in %d seconds (at %d, time is now %d)\n",
			  (uint32)expire-(uint32)now, (uint32) expire, (uint32) now));

		if ( ads->config.realm && (expire > time(NULL))) {
			return ads;
		} else {
			/* we own this ADS_STRUCT so make sure it goes away */
			DEBUG(7,("Deleting expired krb5 credential cache\n"));
			ads->is_mine = True;
			ads_destroy( &ads );
			ads_kdestroy(WINBIND_CCACHE_NAME);
			ad_idmap_ads = NULL;
			TALLOC_FREE( ad_schema );			
		}
	}

	if (!local) {
		/* we don't want this to affect the users ccache */
		setenv("KRB5CCNAME", WINBIND_CCACHE_NAME, 1);
	}

	if ( (ads = ads_init(lp_realm(), lp_workgroup(), NULL)) == NULL ) {
		DEBUG(1,("ads_init failed\n"));
		return NULL;
	}

	/* the machine acct password might have change - fetch it every time */
	SAFE_FREE(ads->auth.password);
	ads->auth.password = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);

	SAFE_FREE(ads->auth.realm);
	ads->auth.realm = SMB_STRDUP(lp_realm());

	/* setup server affinity */

	get_dc_name( NULL, ads->auth.realm, dc_name, &dc_ip );
	
	status = ads_connect(ads);
	if (!ADS_ERR_OK(status)) {
		DEBUG(1, ("ad_idmap_init: failed to connect to AD\n"));
		ads_destroy(&ads);
		return NULL;
	}

	ads->is_mine = False;

	ad_idmap_ads = ads;

	return ads;
}

/************************************************************************
 ***********************************************************************/

static ADS_STRUCT *ad_idmap_cached_connection(void)
{
	ADS_STRUCT *ads = ad_idmap_cached_connection_internal();
	
	if ( !ads )
		return NULL;

	/* if we have a valid ADS_STRUCT and the schema model is
	   defined, then we can return here. */

	if ( ad_schema )
		return ads;

	/* Otherwise, set the schema model */

	if ( (ad_map_type ==  WB_POSIX_MAP_SFU) ||
	     (ad_map_type ==  WB_POSIX_MAP_SFU20) || 
	     (ad_map_type ==  WB_POSIX_MAP_RFC2307) ) 
	{
		ADS_STATUS schema_status;
		
		schema_status = ads_check_posix_schema_mapping( NULL, ads, ad_map_type, &ad_schema);
		if ( !ADS_ERR_OK(schema_status) ) {
			DEBUG(2,("ad_idmap_cached_connection: Failed to obtain schema details!\n"));
			return NULL;			
		}
	}
	
	return ads;
}

/************************************************************************
 ***********************************************************************/

static NTSTATUS idmap_ad_initialize(struct idmap_domain *dom)
{
	struct idmap_ad_context *ctx;
	char *config_option;
	const char *range = NULL;
	const char *schema_mode = NULL;	

	if ( (ctx = TALLOC_ZERO_P(dom, struct idmap_ad_context)) == NULL ) {
		DEBUG(0, ("Out of memory!\n"));
		return NT_STATUS_NO_MEMORY;
	}

	if ( (config_option = talloc_asprintf(ctx, "idmap config %s", dom->name)) == NULL ) {
		DEBUG(0, ("Out of memory!\n"));
		talloc_free(ctx);
		return NT_STATUS_NO_MEMORY;
	}

	/* load ranges */
	range = lp_parm_const_string(-1, config_option, "range", NULL);
	if (range && range[0]) {
		if ((sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
		    (ctx->filter_low_id > ctx->filter_high_id)) {
			DEBUG(1, ("ERROR: invalid filter range [%s]", range));
			ctx->filter_low_id = 0;
			ctx->filter_high_id = 0;
		}
	}

	/* schema mode */
	if ( ad_map_type == WB_POSIX_MAP_UNKNOWN )
		ad_map_type = WB_POSIX_MAP_RFC2307;
	schema_mode = lp_parm_const_string(-1, config_option, "schema_mode", NULL);
	if ( schema_mode && schema_mode[0] ) {
		if ( strequal(schema_mode, "sfu") )
			ad_map_type = WB_POSIX_MAP_SFU;
		else if ( strequal(schema_mode, "sfu20" ) )
			ad_map_type = WB_POSIX_MAP_SFU20;
		else if ( strequal(schema_mode, "rfc2307" ) )
			ad_map_type = WB_POSIX_MAP_RFC2307;
		else
			DEBUG(0,("idmap_ad_initialize: Unknown schema_mode (%s)\n",
				 schema_mode));
	}

	dom->private_data = ctx;
	dom->initialized = True;

	talloc_free(config_option);

	return NT_STATUS_OK;
}

/************************************************************************
 Search up to IDMAP_AD_MAX_IDS entries in maps for a match.
 ***********************************************************************/

static struct id_map *find_map_by_id(struct id_map **maps, enum id_type type, uint32_t id)
{
	int i;

	for (i = 0; maps[i] && i<IDMAP_AD_MAX_IDS; i++) {
		if ((maps[i]->xid.type == type) && (maps[i]->xid.id == id)) {
			return maps[i];
		}
	}

	return NULL;	
}

/************************************************************************
 Search up to IDMAP_AD_MAX_IDS entries in maps for a match
 ***********************************************************************/

static struct id_map *find_map_by_sid(struct id_map **maps, DOM_SID *sid)
{
	int i;

	for (i = 0; maps[i] && i<IDMAP_AD_MAX_IDS; i++) {
		if (sid_equal(maps[i]->sid, sid)) {
			return maps[i];
		}
	}

	return NULL;	
}

/************************************************************************
 ***********************************************************************/

static NTSTATUS idmap_ad_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
{
	NTSTATUS ret;
	TALLOC_CTX *memctx;
	struct idmap_ad_context *ctx;
	ADS_STATUS rc;
	ADS_STRUCT *ads;
	const char *attrs[] = { "sAMAccountType", 
				"objectSid",
				NULL, /* uidnumber */
				NULL, /* gidnumber */
				NULL };
	LDAPMessage *res = NULL;
	LDAPMessage *entry = NULL;
	char *filter = NULL;
	int idx = 0;
	int bidx = 0;
	int count;
	int i;
	char *u_filter = NULL;
	char *g_filter = NULL;

	/* Only do query if we are online */
	if (idmap_is_offline())	{
		return NT_STATUS_FILE_IS_OFFLINE;
	}

	/* Initilization my have been deferred because we were offline */
	if ( ! dom->initialized) {
		ret = idmap_ad_initialize(dom);
		if ( ! NT_STATUS_IS_OK(ret)) {
			return ret;
		}
	}

	ctx = talloc_get_type(dom->private_data, struct idmap_ad_context);

	if ( (memctx = talloc_new(ctx)) == NULL ) {
		DEBUG(0, ("Out of memory!\n"));
		return NT_STATUS_NO_MEMORY;
	}

	if ( (ads = ad_idmap_cached_connection()) == NULL ) {
		DEBUG(1, ("ADS uninitialized\n"));
		ret = NT_STATUS_UNSUCCESSFUL;
		goto done;
	}

	attrs[2] = ad_schema->posix_uidnumber_attr;
	attrs[3] = ad_schema->posix_gidnumber_attr;

again:
	bidx = idx;
	for (i = 0; (i < IDMAP_AD_MAX_IDS) && ids[idx]; i++, idx++) {
		switch (ids[idx]->xid.type) {
		case ID_TYPE_UID:     
			if ( ! u_filter) {
				u_filter = talloc_asprintf(memctx, "(&(|"
							   "(sAMAccountType=%d)"
							   "(sAMAccountType=%d)"
							   "(sAMAccountType=%d))(|",
							   ATYPE_NORMAL_ACCOUNT,
							   ATYPE_WORKSTATION_TRUST,
							   ATYPE_INTERDOMAIN_TRUST);
			}
			u_filter = talloc_asprintf_append_buffer(u_filter, "(%s=%lu)",
							  ad_schema->posix_uidnumber_attr,
							  (unsigned long)ids[idx]->xid.id);
			CHECK_ALLOC_DONE(u_filter);
			break;
				
		case ID_TYPE_GID:
			if ( ! g_filter) {
				g_filter = talloc_asprintf(memctx, "(&(|"
							   "(sAMAccountType=%d)"
							   "(sAMAccountType=%d))(|",
							   ATYPE_SECURITY_GLOBAL_GROUP,
							   ATYPE_SECURITY_LOCAL_GROUP);
			}
			g_filter = talloc_asprintf_append_buffer(g_filter, "(%s=%lu)",
							  ad_schema->posix_gidnumber_attr,
							  (unsigned long)ids[idx]->xid.id);
			CHECK_ALLOC_DONE(g_filter);
			break;

		default:
			DEBUG(3, ("Error: mapping requested but Unknown ID type\n"));
			ids[idx]->status = ID_UNKNOWN;
			continue;
		}
	}
	filter = talloc_asprintf(memctx, "(|");
	CHECK_ALLOC_DONE(filter);
	if ( u_filter) {
		filter = talloc_asprintf_append_buffer(filter, "%s))", u_filter);
		CHECK_ALLOC_DONE(filter);
			TALLOC_FREE(u_filter);
	}
	if ( g_filter) {
		filter = talloc_asprintf_append_buffer(filter, "%s))", g_filter);
		CHECK_ALLOC_DONE(filter);
		TALLOC_FREE(g_filter);
	}
	filter = talloc_asprintf_append_buffer(filter, ")");
	CHECK_ALLOC_DONE(filter);

	rc = ads_search_retry(ads, &res, filter, attrs);
	if (!ADS_ERR_OK(rc)) {
		DEBUG(1, ("ERROR: ads search returned: %s\n", ads_errstr(rc)));
		ret = NT_STATUS_UNSUCCESSFUL;
		goto done;
	}

	if ( (count = ads_count_replies(ads, res)) == 0 ) {
		DEBUG(10, ("No IDs found\n"));
	}

	entry = res;
	for (i = 0; (i < count) && entry; i++) {
		DOM_SID sid;
		enum id_type type;
		struct id_map *map;
		uint32_t id;
		uint32_t atype;

		if (i == 0) { /* first entry */
			entry = ads_first_entry(ads, entry);
		} else { /* following ones */
			entry = ads_next_entry(ads, entry);
		}

		if ( !entry ) {
			DEBUG(2, ("ERROR: Unable to fetch ldap entries from results\n"));
			break;
		}

		/* first check if the SID is present */
		if (!ads_pull_sid(ads, entry, "objectSid", &sid)) {
			DEBUG(2, ("Could not retrieve SID from entry\n"));
			continue;
		}

		/* get type */
		if (!ads_pull_uint32(ads, entry, "sAMAccountType", &atype)) {
			DEBUG(1, ("could not get SAM account type\n"));
			continue;
		}

		switch (atype & 0xF0000000) {
		case ATYPE_SECURITY_GLOBAL_GROUP:
		case ATYPE_SECURITY_LOCAL_GROUP:
			type = ID_TYPE_GID;
			break;
		case ATYPE_NORMAL_ACCOUNT:
		case ATYPE_WORKSTATION_TRUST:
		case ATYPE_INTERDOMAIN_TRUST:
			type = ID_TYPE_UID;
			break;
		default:
			DEBUG(1, ("unrecognized SAM account type %08x\n", atype));
			continue;
		}

		if (!ads_pull_uint32(ads, entry, (type==ID_TYPE_UID) ? 
				                 ad_schema->posix_uidnumber_attr : 
				                 ad_schema->posix_gidnumber_attr, 
				     &id)) 
		{
			DEBUG(1, ("Could not get unix ID\n"));
			continue;
		}

		if ((id == 0) ||
		    (ctx->filter_low_id && (id < ctx->filter_low_id)) ||
		    (ctx->filter_high_id && (id > ctx->filter_high_id))) {
			DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
				id, ctx->filter_low_id, ctx->filter_high_id));
			continue;
		}

		map = find_map_by_id(&ids[bidx], type, id);
		if (!map) {
			DEBUG(2, ("WARNING: couldn't match result with requested ID\n"));
			continue;
		}

		sid_copy(map->sid, &sid);

		/* mapped */
		map->status = ID_MAPPED;

		DEBUG(10, ("Mapped %s -> %lu (%d)\n", sid_string_dbg(map->sid),
			   (unsigned long)map->xid.id,
			   map->xid.type));
	}

	if (res) {
		ads_msgfree(ads, res);
	}

	if (ids[idx]) { /* still some values to map */
		goto again;
	}

	ret = NT_STATUS_OK;

	/* mark all unknown/expired ones as unmapped */
	for (i = 0; ids[i]; i++) {
		if (ids[i]->status != ID_MAPPED) 
			ids[i]->status = ID_UNMAPPED;
	}

done:
	talloc_free(memctx);
	return ret;
}

/************************************************************************
 ***********************************************************************/

static NTSTATUS idmap_ad_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
{
	NTSTATUS ret;
	TALLOC_CTX *memctx;
	struct idmap_ad_context *ctx;
	ADS_STATUS rc;
	ADS_STRUCT *ads;
	const char *attrs[] = { "sAMAccountType", 
				"objectSid",
				NULL, /* attr_uidnumber */
				NULL, /* attr_gidnumber */
				NULL };
	LDAPMessage *res = NULL;
	LDAPMessage *entry = NULL;
	char *filter = NULL;
	int idx = 0;
	int bidx = 0;
	int count;
	int i;
	char *sidstr;

	/* Only do query if we are online */
	if (idmap_is_offline())	{
		return NT_STATUS_FILE_IS_OFFLINE;
	}

	/* Initilization my have been deferred because we were offline */
	if ( ! dom->initialized) {
		ret = idmap_ad_initialize(dom);
		if ( ! NT_STATUS_IS_OK(ret)) {
			return ret;
		}
	}

	ctx = talloc_get_type(dom->private_data, struct idmap_ad_context);	

	if ( (memctx = talloc_new(ctx)) == NULL ) {		
		DEBUG(0, ("Out of memory!\n"));
		return NT_STATUS_NO_MEMORY;
	}

	if ( (ads = ad_idmap_cached_connection()) == NULL ) {
		DEBUG(1, ("ADS uninitialized\n"));
		ret = NT_STATUS_UNSUCCESSFUL;
		goto done;
	}

	attrs[2] = ad_schema->posix_uidnumber_attr;
	attrs[3] = ad_schema->posix_gidnumber_attr;

again:
	filter = talloc_asprintf(memctx, "(&(|"
				 "(sAMAccountType=%d)(sAMAccountType=%d)(sAMAccountType=%d)" /* user account types */
				 "(sAMAccountType=%d)(sAMAccountType=%d)" /* group account types */
				 ")(|",
				 ATYPE_NORMAL_ACCOUNT, ATYPE_WORKSTATION_TRUST, ATYPE_INTERDOMAIN_TRUST,
				 ATYPE_SECURITY_GLOBAL_GROUP, ATYPE_SECURITY_LOCAL_GROUP);
		
	CHECK_ALLOC_DONE(filter);

	bidx = idx;
	for (i = 0; (i < IDMAP_AD_MAX_IDS) && ids[idx]; i++, idx++) {

		sidstr = sid_binstring(ids[idx]->sid);
		filter = talloc_asprintf_append_buffer(filter, "(objectSid=%s)", sidstr);
			
		free(sidstr);
		CHECK_ALLOC_DONE(filter);
	}
	filter = talloc_asprintf_append_buffer(filter, "))");
	CHECK_ALLOC_DONE(filter);
	DEBUG(10, ("Filter: [%s]\n", filter));

	rc = ads_search_retry(ads, &res, filter, attrs);
	if (!ADS_ERR_OK(rc)) {
		DEBUG(1, ("ERROR: ads search returned: %s\n", ads_errstr(rc)));
		ret = NT_STATUS_UNSUCCESSFUL;
		goto done;
	}

	if ( (count = ads_count_replies(ads, res)) == 0 ) {
		DEBUG(10, ("No IDs found\n"));
	}

	entry = res;	
	for (i = 0; (i < count) && entry; i++) {
		DOM_SID sid;
		enum id_type type;
		struct id_map *map;
		uint32_t id;
		uint32_t atype;

		if (i == 0) { /* first entry */
			entry = ads_first_entry(ads, entry);
		} else { /* following ones */
			entry = ads_next_entry(ads, entry);
		}

		if ( !entry ) {
			DEBUG(2, ("ERROR: Unable to fetch ldap entries from results\n"));
			break;
		}

		/* first check if the SID is present */
		if (!ads_pull_sid(ads, entry, "objectSid", &sid)) {
			DEBUG(2, ("Could not retrieve SID from entry\n"));
			continue;
		}

		map = find_map_by_sid(&ids[bidx], &sid);
		if (!map) {
			DEBUG(2, ("WARNING: couldn't match result with requested SID\n"));
			continue;
		}

		/* get type */
		if (!ads_pull_uint32(ads, entry, "sAMAccountType", &atype)) {
			DEBUG(1, ("could not get SAM account type\n"));
			continue;
		}

		switch (atype & 0xF0000000) {
		case ATYPE_SECURITY_GLOBAL_GROUP:
		case ATYPE_SECURITY_LOCAL_GROUP:
			type = ID_TYPE_GID;
			break;
		case ATYPE_NORMAL_ACCOUNT:
		case ATYPE_WORKSTATION_TRUST:
		case ATYPE_INTERDOMAIN_TRUST:
			type = ID_TYPE_UID;
			break;
		default:
			DEBUG(1, ("unrecognized SAM account type %08x\n", atype));
			continue;
		}

		if (!ads_pull_uint32(ads, entry, (type==ID_TYPE_UID) ? 
				                 ad_schema->posix_uidnumber_attr : 
				                 ad_schema->posix_gidnumber_attr, 
				     &id)) 
		{
			DEBUG(1, ("Could not get unix ID\n"));
			continue;
		}
		if ((id == 0) ||
		    (ctx->filter_low_id && (id < ctx->filter_low_id)) ||
		    (ctx->filter_high_id && (id > ctx->filter_high_id))) {
			DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
				id, ctx->filter_low_id, ctx->filter_high_id));
			continue;
		}

		/* mapped */
		map->xid.type = type;
		map->xid.id = id;
		map->status = ID_MAPPED;

		DEBUG(10, ("Mapped %s -> %lu (%d)\n", sid_string_dbg(map->sid),
			   (unsigned long)map->xid.id,
			   map->xid.type));
	}

	if (res) {
		ads_msgfree(ads, res);
	}

	if (ids[idx]) { /* still some values to map */
		goto again;
	}

	ret = NT_STATUS_OK;

	/* mark all unknwoni/expired ones as unmapped */
	for (i = 0; ids[i]; i++) {
		if (ids[i]->status != ID_MAPPED) 
			ids[i]->status = ID_UNMAPPED;
	}

done:
	talloc_free(memctx);
	return ret;
}

/************************************************************************
 ***********************************************************************/

static NTSTATUS idmap_ad_close(struct idmap_domain *dom)
{
	ADS_STRUCT *ads = ad_idmap_ads;

	if (ads != NULL) {
		/* we own this ADS_STRUCT so make sure it goes away */
		ads->is_mine = True;
		ads_destroy( &ads );
		ad_idmap_ads = NULL;
	}

	TALLOC_FREE( ad_schema );
	
	return NT_STATUS_OK;
}

/*
 * nss_info_{sfu,sfu20,rfc2307}
 */

/************************************************************************
 Initialize the {sfu,sfu20,rfc2307} state
 ***********************************************************************/

static NTSTATUS nss_sfu_init( struct nss_domain_entry *e )
{
	/* Sanity check if we have previously been called with a
	   different schema model */

	if ( (ad_map_type != WB_POSIX_MAP_UNKNOWN) &&
	     (ad_map_type != WB_POSIX_MAP_SFU) ) 
	{
		DEBUG(0,("nss_sfu_init: Posix Map type has already been set.  "
			 "Mixed schema models not supported!\n"));
		return NT_STATUS_NOT_SUPPORTED;
	}
	
	ad_map_type = WB_POSIX_MAP_SFU;	

	return NT_STATUS_OK;
}

static NTSTATUS nss_sfu20_init( struct nss_domain_entry *e )
{
	/* Sanity check if we have previously been called with a
	   different schema model */

	if ( (ad_map_type != WB_POSIX_MAP_UNKNOWN) &&
	     (ad_map_type != WB_POSIX_MAP_SFU20) )
	{
		DEBUG(0,("nss_sfu20_init: Posix Map type has already been set.  "
			 "Mixed schema models not supported!\n"));
		return NT_STATUS_NOT_SUPPORTED;
	}
	
	ad_map_type = WB_POSIX_MAP_SFU20;	

	return NT_STATUS_OK;
}

static NTSTATUS nss_rfc2307_init( struct nss_domain_entry *e )
{
	/* Sanity check if we have previously been called with a
	   different schema model */
	 
	if ( (ad_map_type != WB_POSIX_MAP_UNKNOWN) &&
	     (ad_map_type != WB_POSIX_MAP_RFC2307) ) 
	{
		DEBUG(0,("nss_rfc2307_init: Posix Map type has already been set.  "
			 "Mixed schema models not supported!\n"));
		return NT_STATUS_NOT_SUPPORTED;
	}
	
	ad_map_type = WB_POSIX_MAP_RFC2307;

	return NT_STATUS_OK;
}


/************************************************************************
 ***********************************************************************/
static NTSTATUS nss_ad_get_info( struct nss_domain_entry *e, 
				  const DOM_SID *sid, 
				  TALLOC_CTX *ctx,
				  ADS_STRUCT *ads, 
				  LDAPMessage *msg,
				  char **homedir,
				  char **shell, 
				  char **gecos,
				  uint32 *gid )
{
	ADS_STRUCT *ads_internal = NULL;

	/* Only do query if we are online */
	if (idmap_is_offline())	{
		return NT_STATUS_FILE_IS_OFFLINE;
	}

	/* We are assuming that the internal ADS_STRUCT is for the 
	   same forest as the incoming *ads pointer */

	ads_internal = ad_idmap_cached_connection();

	if ( !ads_internal || !ad_schema )
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;
	
	if ( !homedir || !shell || !gecos )
		return NT_STATUS_INVALID_PARAMETER;

	*homedir = ads_pull_string( ads, ctx, msg, ad_schema->posix_homedir_attr );
	*shell   = ads_pull_string( ads, ctx, msg, ad_schema->posix_shell_attr );
	*gecos   = ads_pull_string( ads, ctx, msg, ad_schema->posix_gecos_attr );
       
	if ( gid ) {		
		if ( !ads_pull_uint32(ads, msg, ad_schema->posix_gidnumber_attr, gid ) )
			*gid = (uint32)-1;		
	}
		
	return NT_STATUS_OK;
}

/************************************************************************
 ***********************************************************************/

static NTSTATUS nss_ad_close( void )
{
	/* nothing to do.  All memory is free()'d by the idmap close_fn() */

	return NT_STATUS_OK;
}

/************************************************************************
 Function dispatch tables for the idmap and nss plugins
 ***********************************************************************/

static struct idmap_methods ad_methods = {
	.init            = idmap_ad_initialize,
	.unixids_to_sids = idmap_ad_unixids_to_sids,
	.sids_to_unixids = idmap_ad_sids_to_unixids,
	.close_fn        = idmap_ad_close
};

/* The SFU and RFC2307 NSS plugins share everything but the init
   function which sets the intended schema model to use */
  
static struct nss_info_methods nss_rfc2307_methods = {
	.init         = nss_rfc2307_init,
	.get_nss_info =	nss_ad_get_info,
	.close_fn     = nss_ad_close
};

static struct nss_info_methods nss_sfu_methods = {
	.init         = nss_sfu_init,
	.get_nss_info =	nss_ad_get_info,
	.close_fn     = nss_ad_close
};

static struct nss_info_methods nss_sfu20_methods = {
	.init         = nss_sfu20_init,
	.get_nss_info =	nss_ad_get_info,
	.close_fn     = nss_ad_close
};



/************************************************************************
 Initialize the plugins
 ***********************************************************************/

NTSTATUS idmap_ad_init(void)
{
	static NTSTATUS status_idmap_ad = NT_STATUS_UNSUCCESSFUL;
	static NTSTATUS status_nss_rfc2307 = NT_STATUS_UNSUCCESSFUL;
	static NTSTATUS status_nss_sfu = NT_STATUS_UNSUCCESSFUL;
	static NTSTATUS status_nss_sfu20 = NT_STATUS_UNSUCCESSFUL;

	/* Always register the AD method first in order to get the
	   idmap_domain interface called */

	if ( !NT_STATUS_IS_OK(status_idmap_ad) ) {
		status_idmap_ad = smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, 
						     "ad", &ad_methods);
		if ( !NT_STATUS_IS_OK(status_idmap_ad) )
			return status_idmap_ad;		
	}
	
	if ( !NT_STATUS_IS_OK( status_nss_rfc2307 ) ) {
		status_nss_rfc2307 = smb_register_idmap_nss(SMB_NSS_INFO_INTERFACE_VERSION,
							    "rfc2307",  &nss_rfc2307_methods );		
		if ( !NT_STATUS_IS_OK(status_nss_rfc2307) )
			return status_nss_rfc2307;
	}

	if ( !NT_STATUS_IS_OK( status_nss_sfu ) ) {
		status_nss_sfu = smb_register_idmap_nss(SMB_NSS_INFO_INTERFACE_VERSION,
							"sfu",  &nss_sfu_methods );		
		if ( !NT_STATUS_IS_OK(status_nss_sfu) )
			return status_nss_sfu;		
	}

	if ( !NT_STATUS_IS_OK( status_nss_sfu20 ) ) {
		status_nss_sfu20 = smb_register_idmap_nss(SMB_NSS_INFO_INTERFACE_VERSION,
							"sfu20",  &nss_sfu20_methods );		
		if ( !NT_STATUS_IS_OK(status_nss_sfu20) )
			return status_nss_sfu20;		
	}

	return NT_STATUS_OK;	
}