summaryrefslogtreecommitdiff
path: root/source3/libsmb/clilist.c
blob: 056494e3351b8fbf26ab52a4b4dd510c41aefcbb (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
/*
   Unix SMB/CIFS implementation.
   client directory list routines
   Copyright (C) Andrew Tridgell 1994-1998

   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"
#include "libsmb/libsmb.h"
#include "../lib/util/tevent_ntstatus.h"
#include "async_smb.h"
#include "trans2.h"
#include "../libcli/smb/smbXcli_base.h"

/****************************************************************************
 Calculate a safe next_entry_offset.
****************************************************************************/

static size_t calc_next_entry_offset(const char *base, const char *pdata_end)
{
	size_t next_entry_offset = (size_t)IVAL(base,0);

	if (next_entry_offset == 0 ||
			base + next_entry_offset < base ||
			base + next_entry_offset > pdata_end) {
		next_entry_offset = pdata_end - base;
	}
	return next_entry_offset;
}

/****************************************************************************
 Interpret a long filename structure - this is mostly guesses at the moment.
 The length of the structure is returned
 The structure of a long filename depends on the info level.
 SMB_FIND_FILE_BOTH_DIRECTORY_INFO is used
 by NT and SMB_FIND_EA_SIZE is used by OS/2
****************************************************************************/

static size_t interpret_long_filename(TALLOC_CTX *ctx,
					struct cli_state *cli,
					int level,
					const char *base_ptr,
					uint16_t recv_flags2,
					const char *p,
					const char *pdata_end,
					struct file_info *finfo,
					uint32 *p_resume_key,
					DATA_BLOB *p_last_name_raw)
{
	int len;
	size_t ret;
	const char *base = p;

	data_blob_free(p_last_name_raw);

	if (p_resume_key) {
		*p_resume_key = 0;
	}
	ZERO_STRUCTP(finfo);

	switch (level) {
		case SMB_FIND_INFO_STANDARD: /* OS/2 understands this */
			/* these dates are converted to GMT by
                           make_unix_date */
			if (pdata_end - base < 27) {
				return pdata_end - base;
			}
			finfo->ctime_ts = convert_time_t_to_timespec(
				make_unix_date2(p+4, smb1cli_conn_server_time_zone(cli->conn)));
			finfo->atime_ts = convert_time_t_to_timespec(
				make_unix_date2(p+8, smb1cli_conn_server_time_zone(cli->conn)));
			finfo->mtime_ts = convert_time_t_to_timespec(
				make_unix_date2(p+12, smb1cli_conn_server_time_zone(cli->conn)));
			finfo->size = IVAL(p,16);
			finfo->mode = CVAL(p,24);
			len = CVAL(p, 26);
			p += 27;
			if (recv_flags2 & FLAGS2_UNICODE_STRINGS) {
				p += ucs2_align(base_ptr, p, STR_UNICODE);
			}

			/* We can safely use len here (which is required by OS/2)
			 * and the NAS-BASIC server instead of +2 or +1 as the
			 * STR_TERMINATE flag below is
			 * actually used as the length calculation.
			 * The len is merely an upper bound.
			 * Due to the explicit 2 byte null termination
			 * in cli_receive_trans/cli_receive_nt_trans
			 * we know this is safe. JRA + kukks
			 */

			if (p + len > pdata_end) {
				return pdata_end - base;
			}

			/* the len+2 below looks strange but it is
			   important to cope with the differences
			   between win2000 and win9x for this call
			   (tridge) */
			ret = clistr_pull_talloc(ctx,
						base_ptr,
						recv_flags2,
						&finfo->name,
						p,
						len+2,
						STR_TERMINATE);
			if (ret == (size_t)-1) {
				return pdata_end - base;
			}
			p += ret;
			return PTR_DIFF(p, base);

		case SMB_FIND_EA_SIZE: /* this is what OS/2 uses mostly */
			/* these dates are converted to GMT by
                           make_unix_date */
			if (pdata_end - base < 31) {
				return pdata_end - base;
			}
			finfo->ctime_ts = convert_time_t_to_timespec(
				make_unix_date2(p+4, smb1cli_conn_server_time_zone(cli->conn)));
			finfo->atime_ts = convert_time_t_to_timespec(
				make_unix_date2(p+8, smb1cli_conn_server_time_zone(cli->conn)));
			finfo->mtime_ts = convert_time_t_to_timespec(
				make_unix_date2(p+12, smb1cli_conn_server_time_zone(cli->conn)));
			finfo->size = IVAL(p,16);
			finfo->mode = CVAL(p,24);
			len = CVAL(p, 30);
			p += 31;
			/* check for unisys! */
			if (p + len + 1 > pdata_end) {
				return pdata_end - base;
			}
			ret = clistr_pull_talloc(ctx,
						base_ptr,
						recv_flags2,
						&finfo->name,
						p,
					 	len,
						STR_NOALIGN);
			if (ret == (size_t)-1) {
				return pdata_end - base;
			}
			p += ret;
			return PTR_DIFF(p, base) + 1;

		case SMB_FIND_FILE_BOTH_DIRECTORY_INFO: /* NT uses this, but also accepts 2 */
		{
			size_t namelen, slen;

			if (pdata_end - base < 94) {
				return pdata_end - base;
			}

			p += 4; /* next entry offset */

			if (p_resume_key) {
				*p_resume_key = IVAL(p,0);
			}
			p += 4; /* fileindex */

			/* Offset zero is "create time", not "change time". */
			p += 8;
			finfo->atime_ts = interpret_long_date(p);
			p += 8;
			finfo->mtime_ts = interpret_long_date(p);
			p += 8;
			finfo->ctime_ts = interpret_long_date(p);
			p += 8;
			finfo->size = IVAL2_TO_SMB_BIG_UINT(p,0);
			p += 8;
			p += 8; /* alloc size */
			finfo->mode = CVAL(p,0);
			p += 4;
			namelen = IVAL(p,0);
			p += 4;
			p += 4; /* EA size */
			slen = SVAL(p, 0);
			if (slen > 24) {
				/* Bad short name length. */
				return pdata_end - base;
			}
			p += 2;
			ret = clistr_pull_talloc(ctx,
						base_ptr,
						recv_flags2,
						&finfo->short_name,
						p,
						slen,
						STR_UNICODE);
			if (ret == (size_t)-1) {
				return pdata_end - base;
			}
			p += 24; /* short name? */
			if (p + namelen < p || p + namelen > pdata_end) {
				return pdata_end - base;
			}
			ret = clistr_pull_talloc(ctx,
						base_ptr,
						recv_flags2,
						&finfo->name,
						p,
				    		namelen,
						0);
			if (ret == (size_t)-1) {
				return pdata_end - base;
			}

			/* To be robust in the face of unicode conversion failures
			   we need to copy the raw bytes of the last name seen here.
			   Namelen doesn't include the terminating unicode null, so
			   copy it here. */

			if (p_last_name_raw) {
				*p_last_name_raw = data_blob(NULL, namelen+2);
				memcpy(p_last_name_raw->data, p, namelen);
				SSVAL(p_last_name_raw->data, namelen, 0);
			}
			return calc_next_entry_offset(base, pdata_end);
		}
	}

	DEBUG(1,("Unknown long filename format %d\n",level));
	return calc_next_entry_offset(base, pdata_end);
}

/****************************************************************************
 Interpret a short filename structure.
 The length of the structure is returned.
****************************************************************************/

static bool interpret_short_filename(TALLOC_CTX *ctx,
				struct cli_state *cli,
				char *p,
				struct file_info *finfo)
{
	size_t ret;
	ZERO_STRUCTP(finfo);

	finfo->mode = CVAL(p,21);

	/* this date is converted to GMT by make_unix_date */
	finfo->ctime_ts.tv_sec = make_unix_date(p+22, smb1cli_conn_server_time_zone(cli->conn));
	finfo->ctime_ts.tv_nsec = 0;
	finfo->mtime_ts.tv_sec = finfo->atime_ts.tv_sec = finfo->ctime_ts.tv_sec;
	finfo->mtime_ts.tv_nsec = finfo->atime_ts.tv_nsec = 0;
	finfo->size = IVAL(p,26);
	ret = clistr_pull_talloc(ctx,
			NULL,
			0,
			&finfo->name,
			p+30,
			12,
			STR_ASCII);
	if (ret == (size_t)-1) {
		return false;
	}

	if (finfo->name) {
		finfo->short_name = talloc_strdup(ctx, finfo->name);
		if (finfo->short_name == NULL) {
			return false;
		}
	}
	return true;
}

struct cli_list_old_state {
	struct tevent_context *ev;
	struct cli_state *cli;
	uint16_t vwv[2];
	char *mask;
	int num_asked;
	uint16_t attribute;
	uint8_t search_status[23];
	bool first;
	bool done;
	uint8_t *dirlist;
};

static void cli_list_old_done(struct tevent_req *subreq);

static struct tevent_req *cli_list_old_send(TALLOC_CTX *mem_ctx,
					    struct tevent_context *ev,
					    struct cli_state *cli,
					    const char *mask,
					    uint16_t attribute)
{
	struct tevent_req *req, *subreq;
	struct cli_list_old_state *state;
	uint8_t *bytes;
	static const uint16_t zero = 0;
	uint32_t usable_space;

	req = tevent_req_create(mem_ctx, &state, struct cli_list_old_state);
	if (req == NULL) {
		return NULL;
	}
	state->ev = ev;
	state->cli = cli;
	state->attribute = attribute;
	state->first = true;
	state->mask = talloc_strdup(state, mask);
	if (tevent_req_nomem(state->mask, req)) {
		return tevent_req_post(req, ev);
	}
	usable_space = cli_state_available_size(cli, 100);
	state->num_asked = usable_space / DIR_STRUCT_SIZE;

	SSVAL(state->vwv + 0, 0, state->num_asked);
	SSVAL(state->vwv + 1, 0, state->attribute);

	bytes = talloc_array(state, uint8_t, 1);
	if (tevent_req_nomem(bytes, req)) {
		return tevent_req_post(req, ev);
	}
	bytes[0] = 4;
	bytes = smb_bytes_push_str(bytes, smbXcli_conn_use_unicode(cli->conn), mask,
				   strlen(mask)+1, NULL);

	bytes = smb_bytes_push_bytes(bytes, 5, (const uint8_t *)&zero, 2);
	if (tevent_req_nomem(bytes, req)) {
		return tevent_req_post(req, ev);
	}

	subreq = cli_smb_send(state, state->ev, state->cli, SMBsearch,
			      0, 2, state->vwv, talloc_get_size(bytes), bytes);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, cli_list_old_done, req);
	return req;
}

static void cli_list_old_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct cli_list_old_state *state = tevent_req_data(
		req, struct cli_list_old_state);
	NTSTATUS status;
	uint8_t cmd;
	uint8_t wct;
	uint16_t *vwv;
	uint32_t num_bytes;
	uint8_t *bytes;
	uint16_t received;
	size_t dirlist_len;
	uint8_t *tmp;

	status = cli_smb_recv(subreq, state, NULL, 0, &wct, &vwv, &num_bytes,
			      &bytes);
	if (!NT_STATUS_IS_OK(status)
	    && !NT_STATUS_EQUAL(status, NT_STATUS_DOS(ERRDOS, ERRnofiles))
	    && !NT_STATUS_EQUAL(status, STATUS_NO_MORE_FILES)) {
		TALLOC_FREE(subreq);
		tevent_req_nterror(req, status);
		return;
	}
	if (NT_STATUS_EQUAL(status, NT_STATUS_DOS(ERRDOS, ERRnofiles))
	    || NT_STATUS_EQUAL(status, STATUS_NO_MORE_FILES)) {
		received = 0;
	} else {
		if (wct < 1) {
			TALLOC_FREE(subreq);
			tevent_req_nterror(
				req, NT_STATUS_INVALID_NETWORK_RESPONSE);
			return;
		}
		received = SVAL(vwv + 0, 0);
	}

	if (received > 0) {
		/*
		 * I don't think this can wrap. received is
		 * initialized from a 16-bit value.
		 */
		if (num_bytes < (received * DIR_STRUCT_SIZE + 3)) {
			TALLOC_FREE(subreq);
			tevent_req_nterror(
				req, NT_STATUS_INVALID_NETWORK_RESPONSE);
			return;
		}

		dirlist_len = talloc_get_size(state->dirlist);

		tmp = talloc_realloc(
			state, state->dirlist, uint8_t,
			dirlist_len + received * DIR_STRUCT_SIZE);
		if (tevent_req_nomem(tmp, req)) {
			return;
		}
		state->dirlist = tmp;
		memcpy(state->dirlist + dirlist_len, bytes + 3,
		       received * DIR_STRUCT_SIZE);

		SSVAL(state->search_status, 0, 21);
		memcpy(state->search_status + 2,
		       bytes + 3 + (received-1)*DIR_STRUCT_SIZE, 21);
		cmd = SMBsearch;
	} else {
		if (state->first || state->done) {
			tevent_req_done(req);
			return;
		}
		state->done = true;
		state->num_asked = 0;
		cmd = SMBfclose;
	}
	TALLOC_FREE(subreq);

	state->first = false;

	SSVAL(state->vwv + 0, 0, state->num_asked);
	SSVAL(state->vwv + 1, 0, state->attribute);

	bytes = talloc_array(state, uint8_t, 1);
	if (tevent_req_nomem(bytes, req)) {
		return;
	}
	bytes[0] = 4;
	bytes = smb_bytes_push_str(bytes, smbXcli_conn_use_unicode(state->cli->conn), "",
				   1, NULL);
	bytes = smb_bytes_push_bytes(bytes, 5, state->search_status,
				     sizeof(state->search_status));
	if (tevent_req_nomem(bytes, req)) {
		return;
	}
	subreq = cli_smb_send(state, state->ev, state->cli, cmd, 0,
			      2, state->vwv, talloc_get_size(bytes), bytes);
	if (tevent_req_nomem(subreq, req)) {
		return;
	}
	tevent_req_set_callback(subreq, cli_list_old_done, req);
}

static NTSTATUS cli_list_old_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
				  struct file_info **pfinfo)
{
	struct cli_list_old_state *state = tevent_req_data(
		req, struct cli_list_old_state);
	NTSTATUS status;
	size_t i, num_received;
	struct file_info *finfo;

	if (tevent_req_is_nterror(req, &status)) {
		return status;
	}

	num_received = talloc_array_length(state->dirlist) / DIR_STRUCT_SIZE;

	finfo = talloc_array(mem_ctx, struct file_info, num_received);
	if (finfo == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	for (i=0; i<num_received; i++) {
		if (!interpret_short_filename(
			    finfo, state->cli,
			    (char *)state->dirlist + i * DIR_STRUCT_SIZE,
			    &finfo[i])) {
			TALLOC_FREE(finfo);
			return NT_STATUS_NO_MEMORY;
		}
	}
	*pfinfo = finfo;
	return NT_STATUS_OK;
}

NTSTATUS cli_list_old(struct cli_state *cli, const char *mask,
		      uint16 attribute,
		      NTSTATUS (*fn)(const char *, struct file_info *,
				 const char *, void *), void *state)
{
	TALLOC_CTX *frame = talloc_stackframe();
	struct event_context *ev;
	struct tevent_req *req;
	NTSTATUS status = NT_STATUS_NO_MEMORY;
	struct file_info *finfo;
	size_t i, num_finfo;

	if (smbXcli_conn_has_async_calls(cli->conn)) {
		/*
		 * Can't use sync call while an async call is in flight
		 */
		status = NT_STATUS_INVALID_PARAMETER;
		goto fail;
	}
	ev = event_context_init(frame);
	if (ev == NULL) {
		goto fail;
	}
	req = cli_list_old_send(frame, ev, cli, mask, attribute);
	if (req == NULL) {
		goto fail;
	}
	if (!tevent_req_poll(req, ev)) {
		status = map_nt_error_from_unix(errno);
		goto fail;
	}
	status = cli_list_old_recv(req, frame, &finfo);
	if (!NT_STATUS_IS_OK(status)) {
		goto fail;
	}
	num_finfo = talloc_array_length(finfo);
	for (i=0; i<num_finfo; i++) {
		status = fn(cli->dfs_mountpoint, &finfo[i], mask, state);
		if (!NT_STATUS_IS_OK(status)) {
			goto fail;
		}
	}
 fail:
	TALLOC_FREE(frame);
	return status;
}

struct cli_list_trans_state {
	struct tevent_context *ev;
	struct cli_state *cli;
	char *mask;
	uint16_t attribute;
	uint16_t info_level;

	int loop_count;
	int total_received;
	uint16_t max_matches;
	bool first;

	int ff_eos;
	int ff_dir_handle;

	uint16_t setup[1];
	uint8_t *param;

	struct file_info *finfo;
};

static void cli_list_trans_done(struct tevent_req *subreq);

static struct tevent_req *cli_list_trans_send(TALLOC_CTX *mem_ctx,
					      struct tevent_context *ev,
					      struct cli_state *cli,
					      const char *mask,
					      uint16_t attribute,
					      uint16_t info_level)
{
	struct tevent_req *req, *subreq;
	struct cli_list_trans_state *state;
	size_t param_len;

	req = tevent_req_create(mem_ctx, &state,
				struct cli_list_trans_state);
	if (req == NULL) {
		return NULL;
	}
	state->ev = ev;
	state->cli = cli;
	state->mask = talloc_strdup(state, mask);
	if (tevent_req_nomem(state->mask, req)) {
		return tevent_req_post(req, ev);
	}
	state->attribute = attribute;
	state->info_level = info_level;
	state->loop_count = 0;
	state->first = true;

	state->max_matches = 1366; /* Match W2k */

	SSVAL(&state->setup[0], 0, TRANSACT2_FINDFIRST);

	state->param = talloc_array(state, uint8_t, 12);
	if (tevent_req_nomem(state->param, req)) {
		return tevent_req_post(req, ev);
	}

	SSVAL(state->param, 0, state->attribute);
	SSVAL(state->param, 2, state->max_matches);
	SSVAL(state->param, 4,
	      FLAG_TRANS2_FIND_REQUIRE_RESUME
	      |FLAG_TRANS2_FIND_CLOSE_IF_END
	      |(cli->backup_intent ? FLAG_TRANS2_FIND_BACKUP_INTENT : 0));
	SSVAL(state->param, 6, state->info_level);
	SIVAL(state->param, 8, 0);

	state->param = trans2_bytes_push_str(state->param, smbXcli_conn_use_unicode(cli->conn),
					     state->mask, strlen(state->mask)+1,
					     NULL);
	if (tevent_req_nomem(state->param, req)) {
		return tevent_req_post(req, ev);
	}
	param_len = talloc_get_size(state->param);

	subreq = cli_trans_send(state, state->ev, state->cli,
				SMBtrans2, NULL, -1, 0, 0,
				state->setup, 1, 0,
				state->param, param_len, 10,
				NULL, 0, CLI_BUFFER_SIZE);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, cli_list_trans_done, req);
	return req;
}

static void cli_list_trans_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct cli_list_trans_state *state = tevent_req_data(
		req, struct cli_list_trans_state);
	NTSTATUS status;
	uint8_t *param;
	uint32_t num_param;
	uint8_t *data;
	char *data_end;
	uint32_t num_data;
	uint32_t min_param;
	struct file_info *tmp;
	size_t old_num_finfo;
	uint16_t recv_flags2;
	int ff_searchcount;
	bool ff_eos;
	char *p, *p2;
	uint32_t resume_key = 0;
	int i;
	DATA_BLOB last_name_raw;
	struct file_info *finfo = NULL;
	size_t param_len;

	min_param = (state->first ? 6 : 4);

	status = cli_trans_recv(subreq, talloc_tos(), &recv_flags2,
				NULL, 0, NULL,
				&param, min_param, &num_param,
				&data, 0, &num_data);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		/*
		 * TODO: retry, OS/2 nofiles
		 */
		tevent_req_nterror(req, status);
		return;
	}

	if (state->first) {
		state->ff_dir_handle = SVAL(param, 0);
		ff_searchcount = SVAL(param, 2);
		ff_eos = SVAL(param, 4) != 0;
	} else {
		ff_searchcount = SVAL(param, 0);
		ff_eos = SVAL(param, 2) != 0;
	}

	old_num_finfo = talloc_array_length(state->finfo);

	tmp = talloc_realloc(state, state->finfo, struct file_info,
				   old_num_finfo + ff_searchcount);
	if (tevent_req_nomem(tmp, req)) {
		return;
	}
	state->finfo = tmp;

	p2 = p = (char *)data;
	data_end = (char *)data + num_data;
	last_name_raw = data_blob_null;

	for (i=0; i<ff_searchcount; i++) {
		if (p2 >= data_end) {
			ff_eos = true;
			break;
		}
		if ((state->info_level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO)
		    && (i == ff_searchcount-1)) {
			/* Last entry - fixup the last offset length. */
			SIVAL(p2, 0, PTR_DIFF((data + num_data), p2));
		}

		data_blob_free(&last_name_raw);

		finfo = &state->finfo[old_num_finfo + i];

		p2 += interpret_long_filename(
			state->finfo, /* Stick fname to the array as such */
			state->cli, state->info_level,
			(char *)data, recv_flags2, p2,
			data_end, finfo, &resume_key, &last_name_raw);

		if (finfo->name == NULL) {
			DEBUG(1, ("cli_list: Error: unable to parse name from "
				  "info level %d\n", state->info_level));
			ff_eos = true;
			break;
		}
		if (!state->first && (state->mask[0] != '\0') &&
		    strcsequal(finfo->name, state->mask)) {
			DEBUG(1, ("Error: Looping in FIND_NEXT as name %s has "
				  "already been seen?\n", finfo->name));
			ff_eos = true;
			break;
		}
	}

	if (ff_searchcount == 0) {
		ff_eos = true;
	}

	TALLOC_FREE(param);
	TALLOC_FREE(data);

	/*
	 * Shrink state->finfo to the real length we received
	 */
	tmp = talloc_realloc(state, state->finfo, struct file_info,
				   old_num_finfo + i);
	if (tevent_req_nomem(tmp, req)) {
		return;
	}
	state->finfo = tmp;

	state->first = false;

	if (ff_eos) {
		data_blob_free(&last_name_raw);
		tevent_req_done(req);
		return;
	}

	TALLOC_FREE(state->mask);
	state->mask = talloc_strdup(state, finfo->name);
	if (tevent_req_nomem(state->mask, req)) {
		return;
	}

	SSVAL(&state->setup[0], 0, TRANSACT2_FINDNEXT);

	param = talloc_realloc(state, state->param, uint8_t, 12);
	if (tevent_req_nomem(param, req)) {
		return;
	}
	state->param = param;

	SSVAL(param, 0, state->ff_dir_handle);
	SSVAL(param, 2, state->max_matches); /* max count */
	SSVAL(param, 4, state->info_level);
	/*
	 * For W2K servers serving out FAT filesystems we *must* set
	 * the resume key. If it's not FAT then it's returned as zero.
	 */
	SIVAL(param, 6, resume_key); /* ff_resume_key */
	/*
	 * NB. *DON'T* use continue here. If you do it seems that W2K
	 * and bretheren can miss filenames. Use last filename
	 * continue instead. JRA
	 */
	SSVAL(param, 10, (FLAG_TRANS2_FIND_REQUIRE_RESUME
			  |FLAG_TRANS2_FIND_CLOSE_IF_END
			  |(state->cli->backup_intent ? FLAG_TRANS2_FIND_BACKUP_INTENT : 0)));
	if (last_name_raw.length) {
		state->param = trans2_bytes_push_bytes(state->param,
						       last_name_raw.data,
						       last_name_raw.length);
		if (tevent_req_nomem(state->param, req)) {
			return;
		}
		data_blob_free(&last_name_raw);
	} else {
		state->param = trans2_bytes_push_str(state->param,
						     smbXcli_conn_use_unicode(state->cli->conn),
						     state->mask,
						     strlen(state->mask)+1,
						     NULL);
		if (tevent_req_nomem(state->param, req)) {
			return;
		}
	}
	param_len = talloc_get_size(state->param);

	subreq = cli_trans_send(state, state->ev, state->cli,
				SMBtrans2, NULL, -1, 0, 0,
				state->setup, 1, 0,
				state->param, param_len, 10,
				NULL, 0, CLI_BUFFER_SIZE);
	if (tevent_req_nomem(subreq, req)) {
		return;
	}
	tevent_req_set_callback(subreq, cli_list_trans_done, req);
}

static NTSTATUS cli_list_trans_recv(struct tevent_req *req,
				    TALLOC_CTX *mem_ctx,
				    struct file_info **finfo)
{
	struct cli_list_trans_state *state = tevent_req_data(
		req, struct cli_list_trans_state);
	NTSTATUS status;

	if (tevent_req_is_nterror(req, &status)) {
		return status;
	}
	*finfo = talloc_move(mem_ctx, &state->finfo);
	return NT_STATUS_OK;
}

NTSTATUS cli_list_trans(struct cli_state *cli, const char *mask,
			uint16_t attribute, int info_level,
			NTSTATUS (*fn)(const char *mnt, struct file_info *finfo,
				   const char *mask, void *private_data),
			void *private_data)
{
	TALLOC_CTX *frame = talloc_stackframe();
	struct event_context *ev;
	struct tevent_req *req;
	int i, num_finfo;
	struct file_info *finfo = NULL;
	NTSTATUS status = NT_STATUS_NO_MEMORY;

	if (smbXcli_conn_has_async_calls(cli->conn)) {
		/*
		 * Can't use sync call while an async call is in flight
		 */
		status = NT_STATUS_INVALID_PARAMETER;
		goto fail;
	}
	ev = event_context_init(frame);
	if (ev == NULL) {
		goto fail;
	}
	req = cli_list_trans_send(frame, ev, cli, mask, attribute, info_level);
	if (req == NULL) {
		goto fail;
	}
	if (!tevent_req_poll_ntstatus(req, ev, &status)) {
		goto fail;
	}
	status = cli_list_trans_recv(req, frame, &finfo);
	if (!NT_STATUS_IS_OK(status)) {
		goto fail;
	}
	num_finfo = talloc_array_length(finfo);
	for (i=0; i<num_finfo; i++) {
		status = fn(cli->dfs_mountpoint, &finfo[i], mask, private_data);
		if (!NT_STATUS_IS_OK(status)) {
			goto fail;
		}
	}
 fail:
	TALLOC_FREE(frame);
	return status;
}

struct cli_list_state {
	NTSTATUS (*recv_fn)(struct tevent_req *req, TALLOC_CTX *mem_ctx,
			    struct file_info **finfo);
	struct file_info *finfo;
};

static void cli_list_done(struct tevent_req *subreq);

struct tevent_req *cli_list_send(TALLOC_CTX *mem_ctx,
				 struct tevent_context *ev,
				 struct cli_state *cli,
				 const char *mask,
				 uint16_t attribute,
				 uint16_t info_level)
{
	struct tevent_req *req, *subreq;
	struct cli_list_state *state;

	req = tevent_req_create(mem_ctx, &state, struct cli_list_state);
	if (req == NULL) {
		return NULL;
	}

	if (smbXcli_conn_protocol(cli->conn) <= PROTOCOL_LANMAN1) {
		subreq = cli_list_old_send(state, ev, cli, mask, attribute);
		state->recv_fn = cli_list_old_recv;
	} else {
		subreq = cli_list_trans_send(state, ev, cli, mask, attribute,
					     info_level);
		state->recv_fn = cli_list_trans_recv;
	}
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, cli_list_done, req);
	return req;
}

static void cli_list_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct cli_list_state *state = tevent_req_data(
		req, struct cli_list_state);
	NTSTATUS status;

	status = state->recv_fn(subreq, state, &state->finfo);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		tevent_req_nterror(req, status);
		return;
	}
	tevent_req_done(req);
}

NTSTATUS cli_list_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
		       struct file_info **finfo, size_t *num_finfo)
{
	struct cli_list_state *state = tevent_req_data(
		req, struct cli_list_state);
	NTSTATUS status;

	if (tevent_req_is_nterror(req, &status)) {
		return status;
	}
	*num_finfo = talloc_array_length(state->finfo);
	*finfo = talloc_move(mem_ctx, &state->finfo);
	return NT_STATUS_OK;
}

NTSTATUS cli_list(struct cli_state *cli, const char *mask, uint16 attribute,
		  NTSTATUS (*fn)(const char *, struct file_info *, const char *,
			     void *), void *state)
{
	TALLOC_CTX *frame = talloc_stackframe();
	struct event_context *ev;
	struct tevent_req *req;
	NTSTATUS status = NT_STATUS_NO_MEMORY;
	struct file_info *finfo;
	size_t i, num_finfo;
	uint16_t info_level;

	if (smbXcli_conn_has_async_calls(cli->conn)) {
		/*
		 * Can't use sync call while an async call is in flight
		 */
		status = NT_STATUS_INVALID_PARAMETER;
		goto fail;
	}
	ev = event_context_init(frame);
	if (ev == NULL) {
		goto fail;
	}

	info_level = (smb1cli_conn_capabilities(cli->conn) & CAP_NT_SMBS)
		? SMB_FIND_FILE_BOTH_DIRECTORY_INFO : SMB_FIND_INFO_STANDARD;

	req = cli_list_send(frame, ev, cli, mask, attribute, info_level);
	if (req == NULL) {
		goto fail;
	}
	if (!tevent_req_poll(req, ev)) {
		status = map_nt_error_from_unix(errno);
		goto fail;
	}

	status = cli_list_recv(req, frame, &finfo, &num_finfo);
	if (!NT_STATUS_IS_OK(status)) {
		goto fail;
	}

	for (i=0; i<num_finfo; i++) {
		status = fn(cli->dfs_mountpoint, &finfo[i], mask, state);
		if (!NT_STATUS_IS_OK(status)) {
			goto fail;
		}
	}
 fail:
	TALLOC_FREE(frame);
	return status;
}