summaryrefslogtreecommitdiff
path: root/source3/smbd/smb2_create.c
blob: 7e06914cf29dedc648201d2eccd2202160a5a772 (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
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
/*
   Unix SMB/CIFS implementation.
   Core SMB2 server

   Copyright (C) Stefan Metzmacher 2009

   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 "smbd/globals.h"
#include "../libcli/smb/smb_common.h"

static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
			struct tevent_context *ev,
			struct smbd_smb2_request *smb2req,
			uint8_t in_oplock_level,
			uint32_t in_impersonation_level,
			uint32_t in_desired_access,
			uint32_t in_file_attributes,
			uint32_t in_share_access,
			uint32_t in_create_disposition,
			uint32_t in_create_options,
			const char *in_name,
			struct smb2_create_blobs in_context_blobs);
static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
			TALLOC_CTX *mem_ctx,
			uint8_t *out_oplock_level,
			uint32_t *out_create_action,
			NTTIME *out_creation_time,
			NTTIME *out_last_access_time,
			NTTIME *out_last_write_time,
			NTTIME *out_change_time,
			uint64_t *out_allocation_size,
			uint64_t *out_end_of_file,
			uint32_t *out_file_attributes,
			uint64_t *out_file_id_volatile,
			struct smb2_create_blobs *out_context_blobs);

static void smbd_smb2_request_create_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req)
{
	const uint8_t *inbody;
	int i = req->current_idx;
	size_t expected_body_size = 0x39;
	size_t body_size;
	uint8_t in_oplock_level;
	uint32_t in_impersonation_level;
	uint32_t in_desired_access;
	uint32_t in_file_attributes;
	uint32_t in_share_access;
	uint32_t in_create_disposition;
	uint32_t in_create_options;
	uint16_t in_name_offset;
	uint16_t in_name_length;
	DATA_BLOB in_name_buffer;
	char *in_name_string;
	size_t in_name_string_size;
	uint32_t name_offset = 0;
	uint32_t name_available_length = 0;
	uint32_t in_context_offset;
	uint32_t in_context_length;
	DATA_BLOB in_context_buffer;
	struct smb2_create_blobs in_context_blobs;
	uint32_t context_offset = 0;
	uint32_t context_available_length = 0;
	uint32_t dyn_offset;
	NTSTATUS status;
	bool ok;
	struct tevent_req *subreq;

	if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	inbody = (const uint8_t *)req->in.vector[i+1].iov_base;

	body_size = SVAL(inbody, 0x00);
	if (body_size != expected_body_size) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	in_oplock_level		= CVAL(inbody, 0x03);
	in_impersonation_level	= IVAL(inbody, 0x04);
	in_desired_access	= IVAL(inbody, 0x18);
	in_file_attributes	= IVAL(inbody, 0x1C);
	in_share_access		= IVAL(inbody, 0x20);
	in_create_disposition	= IVAL(inbody, 0x24);
	in_create_options	= IVAL(inbody, 0x28);
	in_name_offset		= SVAL(inbody, 0x2C);
	in_name_length		= SVAL(inbody, 0x2E);
	in_context_offset	= IVAL(inbody, 0x30);
	in_context_length	= IVAL(inbody, 0x34);

	/*
	 * First check if the dynamic name and context buffers
	 * are correctly specified.
	 *
	 * Note: That we don't check if the name and context buffers
	 *       overlap
	 */

	dyn_offset = SMB2_HDR_BODY + (body_size & 0xFFFFFFFE);

	if (in_name_offset == 0 && in_name_length == 0) {
		/* This is ok */
		name_offset = 0;
	} else if (in_name_offset < dyn_offset) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	} else {
		name_offset = in_name_offset - dyn_offset;
	}

	if (name_offset > req->in.vector[i+2].iov_len) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	name_available_length = req->in.vector[i+2].iov_len - name_offset;

	if (in_name_length > name_available_length) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	in_name_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base +
			      name_offset;
	in_name_buffer.length = in_name_length;

	if (in_context_offset == 0 && in_context_length == 0) {
		/* This is ok */
		context_offset = 0;
	} else if (in_context_offset < dyn_offset) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	} else {
		context_offset = in_context_offset - dyn_offset;
	}

	if (context_offset > req->in.vector[i+2].iov_len) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	context_available_length = req->in.vector[i+2].iov_len - context_offset;

	if (in_context_length > context_available_length) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	in_context_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base +
				  context_offset;
	in_context_buffer.length = in_context_length;

	/*
	 * Now interpret the name and context buffers
	 */

	ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
				   in_name_buffer.data,
				   in_name_buffer.length,
				   &in_name_string,
				   &in_name_string_size, false);
	if (!ok) {
		return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
	}

	ZERO_STRUCT(in_context_blobs);
	status = smb2_create_blob_parse(req, in_context_buffer, &in_context_blobs);
	if (!NT_STATUS_IS_OK(status)) {
		return smbd_smb2_request_error(req, status);
	}

	subreq = smbd_smb2_create_send(req,
				       req->sconn->smb2.event_ctx,
				       req,
				       in_oplock_level,
				       in_impersonation_level,
				       in_desired_access,
				       in_file_attributes,
				       in_share_access,
				       in_create_disposition,
				       in_create_options,
				       in_name_string,
				       in_context_blobs);
	if (subreq == NULL) {
		req->subreq = NULL;
		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
	}
	tevent_req_set_callback(subreq, smbd_smb2_request_create_done, req);

	return smbd_smb2_request_pending_queue(req, subreq);
}

static void smbd_smb2_request_create_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	int i = req->current_idx;
	uint8_t *outhdr;
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint8_t out_oplock_level = 0;
	uint32_t out_create_action = 0;
	NTTIME out_creation_time = 0;
	NTTIME out_last_access_time = 0;
	NTTIME out_last_write_time = 0;
	NTTIME out_change_time = 0;
	uint64_t out_allocation_size = 0;
	uint64_t out_end_of_file = 0;
	uint32_t out_file_attributes = 0;
	uint64_t out_file_id_volatile = 0;
	struct smb2_create_blobs out_context_blobs;
	DATA_BLOB out_context_buffer;
	uint16_t out_context_buffer_offset = 0;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_create_recv(subreq,
				       req,
				       &out_oplock_level,
				       &out_create_action,
				       &out_creation_time,
				       &out_last_access_time,
				       &out_last_write_time,
				       &out_change_time,
				       &out_allocation_size,
				       &out_end_of_file,
				       &out_file_attributes,
				       &out_file_id_volatile,
				       &out_context_blobs);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	status = smb2_create_blob_push(req, &out_context_buffer, out_context_blobs);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	if (out_context_buffer.length > 0) {
		out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
	}

	outhdr = (uint8_t *)req->out.vector[i].iov_base;

	outbody = data_blob_talloc(req->out.vector, NULL, 0x58);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x58 + 1);	/* struct size */
	SCVAL(outbody.data, 0x02,
	      out_oplock_level);		/* oplock level */
	SCVAL(outbody.data, 0x03, 0);		/* reserved */
	SIVAL(outbody.data, 0x04,
	      out_create_action);		/* create action */
	SBVAL(outbody.data, 0x08,
	      out_creation_time);		/* creation time */
	SBVAL(outbody.data, 0x10,
	      out_last_access_time);		/* last access time */
	SBVAL(outbody.data, 0x18,
	      out_last_write_time);		/* last write time */
	SBVAL(outbody.data, 0x20,
	      out_change_time);			/* change time */
	SBVAL(outbody.data, 0x28,
	      out_allocation_size);		/* allocation size */
	SBVAL(outbody.data, 0x30,
	      out_end_of_file);			/* end of file */
	SIVAL(outbody.data, 0x38,
	      out_file_attributes);		/* file attributes */
	SIVAL(outbody.data, 0x3C, 0);		/* reserved */
	SBVAL(outbody.data, 0x40, 0);		/* file id (persistent) */
	SBVAL(outbody.data, 0x48,
	      out_file_id_volatile);		/* file id (volatile) */
	SIVAL(outbody.data, 0x50,
	      out_context_buffer_offset);	/* create contexts offset */
	SIVAL(outbody.data, 0x54,
	      out_context_buffer.length);	/* create contexts length */

	outdyn = out_context_buffer;

	error = smbd_smb2_request_done(req, outbody, &outdyn);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->sconn,
						 nt_errstr(error));
		return;
	}
}

struct smbd_smb2_create_state {
	struct smbd_smb2_request *smb2req;
	struct smb_request *smb1req;
	struct timed_event *te;
	struct timeval request_time;
	DATA_BLOB private_data;
	uint8_t out_oplock_level;
	uint32_t out_create_action;
	NTTIME out_creation_time;
	NTTIME out_last_access_time;
	NTTIME out_last_write_time;
	NTTIME out_change_time;
	uint64_t out_allocation_size;
	uint64_t out_end_of_file;
	uint32_t out_file_attributes;
	uint64_t out_file_id_volatile;
	struct smb2_create_blobs out_context_blobs;
};

static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
			struct tevent_context *ev,
			struct smbd_smb2_request *smb2req,
			uint8_t in_oplock_level,
			uint32_t in_impersonation_level,
			uint32_t in_desired_access,
			uint32_t in_file_attributes,
			uint32_t in_share_access,
			uint32_t in_create_disposition,
			uint32_t in_create_options,
			const char *in_name,
			struct smb2_create_blobs in_context_blobs)
{
	struct tevent_req *req = NULL;
	struct smbd_smb2_create_state *state = NULL;
	NTSTATUS status;
	struct smb_request *smb1req = NULL;
	files_struct *result = NULL;
	int info;
	struct timespec write_time_ts;
	struct smb2_create_blobs out_context_blobs;

	ZERO_STRUCT(out_context_blobs);

	if (!smb2req->async) {
		/* New create call. */
		req = tevent_req_create(mem_ctx, &state,
				struct smbd_smb2_create_state);
		if (req == NULL) {
			return NULL;
		}
		state->smb2req = smb2req;
		smb2req->subreq = req; /* So we can find this when going async. */

		smb1req = smbd_smb2_fake_smb_request(smb2req);
		if (tevent_req_nomem(smb1req, req)) {
			return tevent_req_post(req, ev);
		}
		state->smb1req = smb1req;
		DEBUG(10,("smbd_smb2_create: name[%s]\n",
			in_name));
	} else {
		/* Re-entrant create call. */
		req = smb2req->subreq;
		state = tevent_req_data(req,
				struct smbd_smb2_create_state);
		smb1req = state->smb1req;
		DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
			in_name ));
	}

	if (IS_IPC(smb1req->conn)) {
		const char *pipe_name = in_name;

		if (!lp_nt_pipe_support()) {
			tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
			return tevent_req_post(req, ev);
		}

		/* Strip \\ off the name. */
		if (pipe_name[0] == '\\') {
			pipe_name++;
		}

		status = open_np_file(smb1req, pipe_name, &result);
		if (!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}
		info = FILE_WAS_OPENED;
	} else if (CAN_PRINT(smb1req->conn)) {
		status = file_new(smb1req, smb1req->conn, &result);
		if(!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}

		status = print_fsp_open(smb1req,
					smb1req->conn,
					in_name,
					smb1req->vuid,
					result);
		if (!NT_STATUS_IS_OK(status)) {
			file_free(smb1req, result);
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}
		info = FILE_WAS_CREATED;
	} else {
		char *fname;
		struct smb_filename *smb_fname = NULL;
		struct smb2_create_blob *exta = NULL;
		struct ea_list *ea_list = NULL;
		struct smb2_create_blob *mxac = NULL;
		NTTIME max_access_time = 0;
		struct smb2_create_blob *secd = NULL;
		struct security_descriptor *sec_desc = NULL;
		struct smb2_create_blob *dhnq = NULL;
		struct smb2_create_blob *dhnc = NULL;
		struct smb2_create_blob *alsi = NULL;
		uint64_t allocation_size = 0;
		struct smb2_create_blob *twrp = NULL;
		struct smb2_create_blob *qfid = NULL;

		exta = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_EXTA);
		mxac = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_MXAC);
		secd = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_SECD);
		dhnq = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_DHNQ);
		dhnc = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_DHNC);
		alsi = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_ALSI);
		twrp = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_TWRP);
		qfid = smb2_create_blob_find(&in_context_blobs,
					     SMB2_CREATE_TAG_QFID);

		fname = talloc_strdup(state, in_name);
		if (tevent_req_nomem(fname, req)) {
			return tevent_req_post(req, ev);
		}

		if (exta) {
			if (dhnc) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}

			ea_list = read_nttrans_ea_list(mem_ctx,
				(const char *)exta->data.data, exta->data.length);
			if (!ea_list) {
				DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}
		}

		if (mxac) {
			if (dhnc) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}

			if (mxac->data.length == 0) {
				max_access_time = 0;
			} else if (mxac->data.length == 8) {
				max_access_time = BVAL(mxac->data.data, 0);
			} else {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}
		}

		if (secd) {
			enum ndr_err_code ndr_err;

			if (dhnc) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}

			sec_desc = talloc_zero(state, struct security_descriptor);
			if (tevent_req_nomem(sec_desc, req)) {
				return tevent_req_post(req, ev);
			}

			ndr_err = ndr_pull_struct_blob(&secd->data,
				sec_desc, NULL, sec_desc,
				(ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
			if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
				DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
					 ndr_errstr(ndr_err)));
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}
		}

		if (dhnq) {
			if (dhnc) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}

			if (dhnq->data.length != 16) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}
			/*
			 * we don't support durable handles yet
			 * and have to ignore this
			 */
		}

		if (dhnc) {
			if (dhnc->data.length != 16) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}
			/* we don't support durable handles yet */
			tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
			return tevent_req_post(req, ev);
		}

		if (alsi) {
			if (dhnc) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}

			if (alsi->data.length != 8) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}
			allocation_size = BVAL(alsi->data.data, 0);
		}

		if (twrp) {
			NTTIME nttime;
			time_t t;
			struct tm *tm;

			if (dhnc) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}

			if (twrp->data.length != 8) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}

			nttime = BVAL(twrp->data.data, 0);
			t = nt_time_to_unix(nttime);
			tm = gmtime(&t);

			TALLOC_FREE(fname);
			fname = talloc_asprintf(state,
					"@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
					tm->tm_year + 1900,
					tm->tm_mon + 1,
					tm->tm_mday,
					tm->tm_hour,
					tm->tm_min,
					tm->tm_sec,
					in_name);
			if (tevent_req_nomem(fname, req)) {
				return tevent_req_post(req, ev);
			}
		}

		if (qfid) {
			if (qfid->data.length != 0) {
				tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
				return tevent_req_post(req, ev);
			}
		}

		/* these are ignored for SMB2 */
		in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
		in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */

		/* convert '\\' into '/' */
		status = check_path_syntax(fname);
		if (!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}

		status = filename_convert(req,
					  smb1req->conn,
					  smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
					  fname,
					  0,
					  NULL,
					  &smb_fname);
		if (!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}

		status = SMB_VFS_CREATE_FILE(smb1req->conn,
					     smb1req,
					     0, /* root_dir_fid */
					     smb_fname,
					     in_desired_access,
					     in_share_access,
					     in_create_disposition,
					     in_create_options,
					     in_file_attributes,
					     0, /* oplock_request */
					     allocation_size,
					     0, /* private_flags */
					     sec_desc,
					     ea_list,
					     &result,
					     &info);
		if (!NT_STATUS_IS_OK(status)) {
			if (open_was_deferred(smb1req->mid)) {
				return req;
			}
			tevent_req_nterror(req, status);
			req = tevent_req_post(req, ev);
			return req;
		}

		if (mxac) {
			NTTIME last_write_time;

			unix_timespec_to_nt_time(&last_write_time,
						 result->fsp_name->st.st_ex_mtime);
			if (last_write_time != max_access_time) {
				uint8_t p[8];
				uint32_t max_access_granted;
				DATA_BLOB blob = data_blob_const(p, sizeof(p));

				status = smbd_check_open_rights(smb1req->conn,
							result->fsp_name,
							SEC_FLAG_MAXIMUM_ALLOWED,
							&max_access_granted);

				SIVAL(p, 0, NT_STATUS_V(status));
				SIVAL(p, 4, max_access_granted);

				status = smb2_create_blob_add(state,
							&out_context_blobs,
							SMB2_CREATE_TAG_MXAC,
							blob);
				if (!NT_STATUS_IS_OK(status)) {
					tevent_req_nterror(req, status);
					return tevent_req_post(req, ev);
				}
			}
		}

		if (qfid) {
			uint8_t p[32];
			DATA_BLOB blob = data_blob_const(p, sizeof(p));

			ZERO_STRUCT(p);

			/* TODO: maybe use result->file_id */
			SIVAL(p, 0, result->fsp_name->st.st_ex_ino);/* FileIndexLow */
			SIVAL(p, 4, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */

			status = smb2_create_blob_add(state, &out_context_blobs,
						      SMB2_CREATE_TAG_QFID,
						      blob);
			if (!NT_STATUS_IS_OK(status)) {
				tevent_req_nterror(req, status);
				return tevent_req_post(req, ev);
			}
		}
	}

	smb2req->compat_chain_fsp = smb1req->chain_fsp;

	state->out_oplock_level	= 0;
	if ((in_create_disposition == FILE_SUPERSEDE)
	    && (info == FILE_WAS_OVERWRITTEN)) {
		state->out_create_action = FILE_WAS_SUPERSEDED;
	} else {
		state->out_create_action = info;
	}
	state->out_file_attributes = dos_mode(result->conn,
					   result->fsp_name);
	/* Deal with other possible opens having a modified
	   write time. JRA. */
	ZERO_STRUCT(write_time_ts);
	get_file_infos(result->file_id, NULL, &write_time_ts);
	if (!null_timespec(write_time_ts)) {
		update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
	}

	unix_timespec_to_nt_time(&state->out_creation_time,
			get_create_timespec(smb1req->conn, result,
					result->fsp_name));
	unix_timespec_to_nt_time(&state->out_last_access_time,
			result->fsp_name->st.st_ex_atime);
	unix_timespec_to_nt_time(&state->out_last_write_time,
			result->fsp_name->st.st_ex_mtime);
	unix_timespec_to_nt_time(&state->out_change_time,
			get_change_timespec(smb1req->conn, result,
					result->fsp_name));
	state->out_allocation_size =
			result->fsp_name->st.st_ex_blksize *
			result->fsp_name->st.st_ex_blocks;
	state->out_end_of_file = result->fsp_name->st.st_ex_size;
	if (state->out_file_attributes == 0) {
		state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
	}
	state->out_file_id_volatile = result->fnum;
	state->out_context_blobs = out_context_blobs;

	tevent_req_done(req);
	return tevent_req_post(req, ev);
}

static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
			TALLOC_CTX *mem_ctx,
			uint8_t *out_oplock_level,
			uint32_t *out_create_action,
			NTTIME *out_creation_time,
			NTTIME *out_last_access_time,
			NTTIME *out_last_write_time,
			NTTIME *out_change_time,
			uint64_t *out_allocation_size,
			uint64_t *out_end_of_file,
			uint32_t *out_file_attributes,
			uint64_t *out_file_id_volatile,
			struct smb2_create_blobs *out_context_blobs)
{
	NTSTATUS status;
	struct smbd_smb2_create_state *state = tevent_req_data(req,
					       struct smbd_smb2_create_state);

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

	*out_oplock_level	= state->out_oplock_level;
	*out_create_action	= state->out_create_action;
	*out_creation_time	= state->out_creation_time;
	*out_last_access_time	= state->out_last_access_time;
	*out_last_write_time	= state->out_last_write_time;
	*out_change_time	= state->out_change_time;
	*out_allocation_size	= state->out_allocation_size;
	*out_end_of_file	= state->out_end_of_file;
	*out_file_attributes	= state->out_file_attributes;
	*out_file_id_volatile	= state->out_file_id_volatile;
	*out_context_blobs	= state->out_context_blobs;

	talloc_steal(mem_ctx, state->out_context_blobs.blobs);

	tevent_req_received(req);
	return NT_STATUS_OK;
}

/*********************************************************
 Code for dealing with deferred opens.
*********************************************************/

bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
			struct timeval *p_request_time,
			void **pp_state)
{
	struct smbd_smb2_create_state *state = NULL;
	struct tevent_req *req = NULL;

	if (!smb2req) {
		return false;
	}
	if (!smb2req->async) {
		return false;
	}
	req = smb2req->subreq;
	if (!req) {
		return false;
	}
	state = tevent_req_data(req, struct smbd_smb2_create_state);
	if (!state) {
		return false;
	}
	if (p_request_time) {
		*p_request_time = state->request_time;
	}
	if (pp_state) {
		*pp_state = (void *)state->private_data.data;
	}
	return true;
}

/*********************************************************
 Re-process this call early - requested by message or
 close.
*********************************************************/

static struct smbd_smb2_request *find_open_smb2req(uint64_t mid)
{
	struct smbd_server_connection *sconn = smbd_server_conn;
	struct smbd_smb2_request *smb2req;

	for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
		uint8_t *reqhdr = (uint8_t *)smb2req->out.vector[smb2req->current_idx].iov_base;
		uint64_t message_id = BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
		if (message_id == mid) {
			return smb2req;
		}
	}
	return NULL;
}

bool open_was_deferred_smb2(uint64_t mid)
{
	struct smbd_smb2_create_state *state = NULL;
	struct smbd_smb2_request *smb2req = find_open_smb2req(mid);

	if (!smb2req) {
		DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
			(unsigned long long)mid));
		return false;
	}
	if (!smb2req->subreq) {
		return false;
	}
	if (!tevent_req_is_in_progress(smb2req->subreq)) {
		return false;
	}
	state = tevent_req_data(smb2req->subreq,
			struct smbd_smb2_create_state);
	if (!state) {
		return false;
	}
	/* It's not in progress if there's no timeout event. */
	if (!state->te) {
		return false;
	}

	DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
			(unsigned long long)mid));
	
	return true;
}

void remove_deferred_open_message_smb2(uint64_t mid)
{
	struct smbd_smb2_create_state *state = NULL;
	struct smbd_smb2_request *smb2req = find_open_smb2req(mid);

	if (!smb2req) {
		DEBUG(10,("remove_deferred_open_message_smb2: "
			"can't find mid %llu\n",
			(unsigned long long)mid ));
		return;
	}
	if (!smb2req->subreq) {
		return;
	}
	if (!tevent_req_is_in_progress(smb2req->subreq)) {
		return;
	}
	state = tevent_req_data(smb2req->subreq,
			struct smbd_smb2_create_state);
	if (!state) {
		return;
	}

	DEBUG(10,("remove_deferred_open_message_smb2: "
		"mid %llu\n",
		(unsigned long long)mid ));

	/* Ensure we don't have any outstanding timer event. */
	TALLOC_FREE(state->te);
}

void schedule_deferred_open_message_smb2(uint64_t mid)
{
	struct tevent_immediate *im = NULL;
	struct smbd_smb2_create_state *state = NULL;
	struct smbd_smb2_request *smb2req = find_open_smb2req(mid);

	if (!smb2req) {
		DEBUG(10,("schedule_deferred_open_message_smb2: "
			"can't find mid %llu\n",
			(unsigned long long)mid ));
		return;
	}
	if (!smb2req->subreq) {
		return;
	}
	if (!tevent_req_is_in_progress(smb2req->subreq)) {
		return;
	}
	state = tevent_req_data(smb2req->subreq,
			struct smbd_smb2_create_state);
	if (!state) {
		return;
	}
	/* Ensure we don't have any outstanding timer event. */
	TALLOC_FREE(state->te);

	im = tevent_create_immediate(smb2req);
	if (!im) {
		smbd_server_connection_terminate(smb2req->sconn,
			nt_errstr(NT_STATUS_NO_MEMORY));
	}

	DEBUG(10,("schedule_deferred_open_message_smb2: "
		"re-processing mid %llu\n",
		(unsigned long long)mid ));

	tevent_schedule_immediate(im,
			smb2req->sconn->smb2.event_ctx,
			smbd_smb2_request_dispatch_immediate,
			smb2req);
}

/*********************************************************
 Re-process this call.
*********************************************************/

static void smb2_deferred_open_timer(struct event_context *ev,
					struct timed_event *te,
					struct timeval _tval,
					void *private_data)
{
	NTSTATUS status;
	struct smbd_smb2_create_state *state = NULL;
	struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
						struct smbd_smb2_request);

	DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
		smb2req->current_idx,
		tevent_req_default_print(smb2req->subreq, talloc_tos()) ));

	state = tevent_req_data(smb2req->subreq,
			struct smbd_smb2_create_state);
	if (!state) {
		return;
	}
	/*
	 * Null this out, don't talloc_free. It will
	 * be talloc_free'd by the tevent library when
	 * this returns.
	 */
	state->te = NULL;

	/*
	 * This is subtle. We must null out the callback
	 * before resheduling, else the first call to
	 * tevent_req_nterror() causes the _receive()
	 * function to be called, this causing tevent_req_post()
	 * to crash.
	 */
	tevent_req_set_callback(smb2req->subreq, NULL, NULL);

	status = smbd_smb2_request_dispatch(smb2req);

	if (!NT_STATUS_IS_OK(status)) {
		smbd_server_connection_terminate(smb2req->sconn,
				nt_errstr(status));
	}
}

bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
                                struct timeval request_time,
                                struct timeval timeout,
                                char *private_data,
                                size_t priv_len)
{
	struct tevent_req *req = NULL;
	struct smbd_smb2_create_state *state = NULL;
	struct timeval end_time;

	if (!smb2req) {
		return false;
	}
	req = smb2req->subreq;
	if (!req) {
		return false;
	}
	state = tevent_req_data(req, struct smbd_smb2_create_state);
	if (!state) {
		return false;
	}
	state->request_time = request_time;
	state->private_data = data_blob_talloc(state, private_data,
						priv_len);
	if (!state->private_data.data) {
		return false;
	}
#if 0
	/* Boo - turns out this isn't what W2K8R2
	   does. It actually sends the STATUS_PENDING
	   message followed by the STATUS_SHARING_VIOLATION
	   message. Surely this means that all open
	   calls (even on directories) will potentially
	   fail in a chain.... ? And I've seen directory
	   opens as the start of a chain. JRA.
	*/
	/*
	 * More subtlety. To match W2K8R2 don't
	 * send a "gone async" message if it's simply
	 * a STATUS_SHARING_VIOLATION (short) wait, not
	 * an oplock break wait. We do this by prematurely
	 * setting smb2req->async flag.
	 */
	if (timeout.tv_sec < 2) {
		DEBUG(10,("push_deferred_open_message_smb2: "
			"short timer wait (usec = %u). "
			"Don't send async message.\n",
			(unsigned int)timeout.tv_usec ));
		smb2req->async = true;
	}
#endif

	/* Re-schedule us to retry on timer expiry. */
	end_time = timeval_sum(&request_time, &timeout);

	DEBUG(10,("push_deferred_open_message_smb2: "
		"timeout at %s\n",
		timeval_string(talloc_tos(),
				&end_time,
				true) ));

	state->te = event_add_timed(smb2req->sconn->smb2.event_ctx,
				state,
				end_time,
				smb2_deferred_open_timer,
				smb2req);
        if (!state->te) {
		return false;
	}
	return true;
}