aboutsummaryrefslogtreecommitdiffstats
path: root/packet-tns.c
blob: d5c02747ec249c98a91cb3d49615b6c2355d14c7 (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
/* packet-tns.c
 * Routines for Oracle TNS packet dissection
 *
 * $Id: packet-tns.c,v 1.21 2001/10/08 14:32:06 nneul Exp $
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@zing.org>
 * Copyright 1998 Gerald Combs
 *
 * Copied from packet-tftp.c
 * 
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>

#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif

#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif

#include <string.h>
#include <glib.h>
#include "packet.h"
#include "packet-tns.h"

static int proto_tns = -1;
static int hf_tns_request = -1;
static int hf_tns_response = -1;
static int hf_tns_length = -1;
static int hf_tns_packet_checksum = -1;
static int hf_tns_header_checksum = -1;
static int hf_tns_packet_type = -1;
static int hf_tns_reserved_byte = -1;
static int hf_tns_connect = -1;
static int hf_tns_version = -1;
static int hf_tns_compat_version = -1;
static int hf_tns_service_options = -1;
static int hf_tns_sdu_size = -1;
static int hf_tns_max_tdu_size = -1;
static int hf_tns_nt_proto_characteristics = -1;
static int hf_tns_line_turnaround = -1;
static int hf_tns_value_of_one = -1;
static int hf_tns_connect_data_length = -1;
static int hf_tns_connect_data_offset = -1;
static int hf_tns_connect_data_max = -1;
static int hf_tns_connect_flags0 = -1;
static int hf_tns_connect_flags1 = -1;
static int hf_tns_connect_data = -1;
static int hf_tns_trace_cf1 = -1;
static int hf_tns_trace_cf2 = -1;
static int hf_tns_trace_cid = -1;

static int hf_tns_accept = -1;
static int hf_tns_accept_data_length = -1;
static int hf_tns_accept_data_offset = -1;
static int hf_tns_accept_data = -1;

static int hf_tns_refuse = -1;
static int hf_tns_refuse_reason_user = -1;
static int hf_tns_refuse_reason_system = -1;
static int hf_tns_refuse_data_length = -1;
static int hf_tns_refuse_data = -1;

static int hf_tns_abort = -1;
static int hf_tns_abort_reason_user = -1;
static int hf_tns_abort_reason_system = -1;
static int hf_tns_abort_data = -1;

static int hf_tns_marker = -1;
static int hf_tns_marker_type = -1;
static int hf_tns_marker_data_byte = -1;
static int hf_tns_marker_data = -1;

static int hf_tns_redirect = -1;
static int hf_tns_redirect_data_length = -1;
static int hf_tns_redirect_data = -1;

static int hf_tns_control = -1;
static int hf_tns_control_cmd = -1;
static int hf_tns_control_data = -1;

static int hf_tns_data_flag = -1;
static int hf_tns_data_flag_send = -1;
static int hf_tns_data_flag_rc = -1;
static int hf_tns_data_flag_c = -1;
static int hf_tns_data_flag_reserved = -1;
static int hf_tns_data_flag_more = -1;
static int hf_tns_data_flag_eof = -1;
static int hf_tns_data_flag_dic = -1;
static int hf_tns_data_flag_rts = -1;
static int hf_tns_data_flag_sntt = -1;
static int hf_tns_data = -1;

static gint ett_tns = -1;
static gint ett_tns_connect = -1;
static gint ett_tns_accept = -1;
static gint ett_tns_refuse = -1;
static gint ett_tns_abort = -1;
static gint ett_tns_redirect = -1;
static gint ett_tns_marker = -1;
static gint ett_tns_attention = -1;
static gint ett_tns_control = -1;
static gint ett_tns_data = -1;
static gint ett_tns_data_flag = -1;
static gint ett_sql = -1;

#define TCP_PORT_TNS			1521

static const value_string tns_type_vals[] = {
	{TNS_TYPE_CONNECT,   "Connect" },
	{TNS_TYPE_ACCEPT,    "Accept" },
	{TNS_TYPE_ACK,       "Acknowledge" },
	{TNS_TYPE_REFUSE,    "Refuse" },
	{TNS_TYPE_REDIRECT,  "Redirect" },
	{TNS_TYPE_DATA,      "Data" },
	{TNS_TYPE_NULL,      "Null" },
	{TNS_TYPE_ABORT,     "Abort" },
	{TNS_TYPE_RESEND,    "Resend"},
	{TNS_TYPE_MARKER,    "Marker"},
	{TNS_TYPE_ATTENTION, "Attention"},
	{TNS_TYPE_CONTROL,   "Control"},
	{0, NULL}
};

static const value_string tns_marker_types[] = {
	{0, "Data Marker - 0 Data Bytes"},
	{1, "Data Marker - 1 Data Bytes"},
	{2, "Attention Marker"},
	{0, NULL}
};

static const value_string tns_control_cmds[] = {
	{1, "Oracle Trace Command"},
	{0, NULL}
};

static void dissect_tns_data(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree)
{
	proto_tree *data_tree = NULL, *ti;
	int is_sns = 0;
	
	if ( tvb_bytes_exist(tvb, offset+2, 4) )
	{
		if ( tvb_get_guint8(tvb, offset+2) == 0xDE &&
		     tvb_get_guint8(tvb, offset+3) == 0xAD &&
		     tvb_get_guint8(tvb, offset+4) == 0xBE &&
		     tvb_get_guint8(tvb, offset+5) == 0xEF )
		{
			is_sns = 1;
		}
	}

	if ( tree )
	{
		if ( is_sns )
		{
			ti = proto_tree_add_text(tns_tree, tvb, offset,
			    tvb_length_remaining(tvb, offset), "Secure Network Services");
		}
		else
		{
			ti = proto_tree_add_text(tns_tree, tvb, offset,
			    tvb_length_remaining(tvb, offset), "Data");		
		}
		data_tree = proto_item_add_subtree(ti, ett_tns_data);

		proto_tree_add_boolean_hidden(tns_tree, hf_tns_data, tvb, 0, 0,
				TRUE);
	}

	if ( tree )
	{
		proto_tree *df_tree = NULL;
		
		ti = proto_tree_add_uint(data_tree, hf_tns_data_flag, tvb, offset, 2, FALSE);
		
		df_tree = proto_item_add_subtree(ti, ett_tns_data_flag);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_send, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_rc, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_c, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_reserved, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_more, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_eof, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_dic, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_rts, tvb, offset, 2, FALSE);
		proto_tree_add_uint(df_tree, hf_tns_data_flag_sntt, tvb, offset, 2, FALSE);
	}
	offset += 2;

	if ( check_col(pinfo->fd, COL_INFO) )
	{
		if ( is_sns )
		{
			col_append_fstr(pinfo->fd, COL_INFO, ", SNS");
		}
		else
		{
			col_append_fstr(pinfo->fd, COL_INFO, ", Data");
		}	
	}
	
	if ( data_tree )
	{
		dissect_data(tvb,offset,pinfo,data_tree);
	}

	return;
}

static void dissect_tns_connect(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree)
{
	proto_tree *connect_tree = NULL, *ti;
	int cd_offset;
	int cd_len;
	int tns_offset = offset-8;

	if ( tree )
	{
		ti = proto_tree_add_text(tns_tree, tvb, offset,
		    tvb_length_remaining(tvb, offset), "Connect");
		connect_tree = proto_item_add_subtree(ti, ett_tns_connect);

		proto_tree_add_boolean_hidden(tns_tree, hf_tns_connect, tvb,
		    0, 0, TRUE);
	}
		
	if ( check_col(pinfo->fd, COL_INFO) )
	{
		col_append_str(pinfo->fd, COL_INFO, ", Connect");
	}

	if ( connect_tree )
	{
		proto_tree_add_item(connect_tree, hf_tns_version, tvb,
			offset, 2, FALSE);
	}
	offset += 2;
	
	if ( connect_tree )
	{
		proto_tree_add_item(connect_tree, hf_tns_compat_version, tvb,
			offset, 2, FALSE);
	}
	offset += 2;

	if ( connect_tree )
	{
		/* need to break down w/ bitfield */
		proto_tree_add_uint(connect_tree, hf_tns_service_options, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_sdu_size, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_max_tdu_size, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_nt_proto_characteristics, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_line_turnaround, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_bytes(connect_tree, hf_tns_value_of_one, tvb,
			offset, 2, tvb_get_ptr(tvb, offset, 2));
	}
	offset += 2;

	cd_len = tvb_get_ntohs(tvb, offset);
	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_connect_data_length, tvb,
			offset, 2, cd_len);
	}
	offset += 2;

	cd_offset = tvb_get_ntohs(tvb, offset);
	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_connect_data_offset, tvb,
			offset, 2, cd_offset);
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_connect_data_max, tvb,
			offset, 4, tvb_get_ntohl(tvb, offset));
	}
	offset += 4;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_connect_flags0, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_connect_flags1, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_trace_cf1, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_trace_cf2, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree )
	{
		proto_tree_add_uint(connect_tree, hf_tns_trace_cid, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( connect_tree && cd_len > 0)
	{
		proto_tree_add_string(connect_tree, hf_tns_connect_data, tvb,
			tns_offset+cd_offset, tvb_length(tvb)-(tns_offset+cd_offset), 
			tvb_get_ptr(tvb, tns_offset+cd_offset,
			tvb_length(tvb)-(tns_offset+cd_offset)));
	}
	return;
}

static void dissect_tns_accept(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree)
{
	proto_tree *accept_tree = NULL, *ti;
	int accept_offset;
	int accept_len;
	int tns_offset = offset-8;

	if ( tree )
	{
		ti = proto_tree_add_text(tns_tree, tvb, offset,
		    tvb_length_remaining(tvb, offset), "Accept");
		accept_tree = proto_item_add_subtree(ti, ett_tns_accept);

		proto_tree_add_boolean_hidden(tns_tree, hf_tns_accept, tvb,
		    0, 0, TRUE);
	}
		
	if ( check_col(pinfo->fd, COL_INFO) )
	{
		col_append_str(pinfo->fd, COL_INFO, ", Accept");
	}

	if ( accept_tree )
	{
		proto_tree_add_item(accept_tree, hf_tns_version, tvb,
			offset, 2, FALSE);
	}
	offset += 2;
	
	if ( accept_tree )
	{
		proto_tree_add_uint(accept_tree, hf_tns_service_options, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( accept_tree )
	{
		proto_tree_add_uint(accept_tree, hf_tns_sdu_size, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( accept_tree )
	{
		proto_tree_add_uint(accept_tree, hf_tns_max_tdu_size, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( accept_tree )
	{
		proto_tree_add_bytes(accept_tree, hf_tns_value_of_one, tvb,
			offset, 2, tvb_get_ptr(tvb, offset, 2));
	}
	offset += 2;

	accept_len = tvb_get_ntohs(tvb, offset);
	if ( accept_tree )
	{
		proto_tree_add_uint(accept_tree, hf_tns_accept_data_length, tvb,
			offset, 2, accept_len);
	}
	offset += 2;

	accept_offset = tvb_get_ntohs(tvb, offset);
	if ( accept_tree )
	{
		proto_tree_add_uint(accept_tree, hf_tns_accept_data_offset, tvb,
			offset, 2, accept_offset);
	}
	offset += 2;

	if ( accept_tree )
	{
		proto_tree_add_uint(accept_tree, hf_tns_connect_flags0, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( accept_tree )
	{
		proto_tree_add_uint(accept_tree, hf_tns_connect_flags1, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( accept_tree && accept_len > 0)
	{
		proto_tree_add_string(accept_tree, hf_tns_accept_data, tvb,
			tns_offset+accept_offset, tvb_length(tvb)-(tns_offset+accept_offset), 
			tvb_get_ptr(tvb, tns_offset+accept_offset,
			tvb_length(tvb)-(tns_offset+accept_offset)));
	}
	return;
}


static void dissect_tns_refuse(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree)
{
	proto_tree *refuse_tree = NULL, *ti;

	if ( tree )
	{
		ti = proto_tree_add_text(tns_tree, tvb, offset,
		    tvb_length_remaining(tvb, offset), "Refuse");
		refuse_tree = proto_item_add_subtree(ti, ett_tns_refuse);

		proto_tree_add_boolean_hidden(tns_tree, hf_tns_refuse, tvb,
		    0, 0, TRUE);
	}
		
	if ( check_col(pinfo->fd, COL_INFO) )
	{
		col_append_str(pinfo->fd, COL_INFO, ", Refuse");
	}

	if ( refuse_tree )
	{
		proto_tree_add_uint(refuse_tree, hf_tns_refuse_reason_user, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( refuse_tree )
	{
		proto_tree_add_uint(refuse_tree, hf_tns_refuse_reason_system, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( refuse_tree )
	{
		proto_tree_add_uint(refuse_tree, hf_tns_refuse_data_length, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( refuse_tree )
	{
		proto_tree_add_string(refuse_tree, hf_tns_refuse_data, tvb,
			offset, tvb_length(tvb)-offset, 
			tvb_get_ptr(tvb, offset, tvb_length(tvb)-offset));
	}
	return;
}


static void dissect_tns_abort(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree)
{
	proto_tree *abort_tree = NULL, *ti;

	if ( tree )
	{
		ti = proto_tree_add_text(tns_tree, tvb, offset,
		    tvb_length_remaining(tvb, offset), "Abort");
		abort_tree = proto_item_add_subtree(ti, ett_tns_abort);

		proto_tree_add_boolean_hidden(tns_tree, hf_tns_abort, tvb,
		    0, 0, TRUE);
	}
		
	if ( check_col(pinfo->fd, COL_INFO) )
	{
		col_append_str(pinfo->fd, COL_INFO, ", Abort");
	}

	if ( abort_tree )
	{
		proto_tree_add_uint(abort_tree, hf_tns_abort_reason_user, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( abort_tree )
	{
		proto_tree_add_uint(abort_tree, hf_tns_abort_reason_system, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( abort_tree )
	{
		proto_tree_add_string(abort_tree, hf_tns_abort_data, tvb,
			offset, tvb_length_remaining(tvb,offset), 
			tvb_get_ptr(tvb, offset, tvb_length_remaining(tvb,offset)));
	}
	return;
}


static void dissect_tns_marker(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree, int is_attention)
{
	proto_tree *marker_tree = NULL, *ti;

	if ( tree )
	{
		if ( is_attention )
		{
			ti = proto_tree_add_text(tns_tree, tvb, offset,
			    tvb_length_remaining(tvb, offset), "Marker");
		}
		else
		{
			ti = proto_tree_add_text(tns_tree, tvb, offset,
			    tvb_length_remaining(tvb, offset), "Attention");
		}

		marker_tree = proto_item_add_subtree(ti, ett_tns_marker);
		proto_tree_add_boolean_hidden(tns_tree, hf_tns_marker, tvb,
		    0, 0, TRUE);
	}
		
	if ( check_col(pinfo->fd, COL_INFO) )
	{
		if ( is_attention )
		{
			col_append_str(pinfo->fd, COL_INFO, ", Marker");
		}
		else
		{
			col_append_str(pinfo->fd, COL_INFO, ", Attention");
		}
	}

	if ( marker_tree )
	{
		proto_tree_add_uint(marker_tree, hf_tns_marker_type, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( marker_tree )
	{
		proto_tree_add_uint(marker_tree, hf_tns_marker_data_byte, tvb,
			offset, 1, tvb_get_guint8(tvb, offset));
	}
	offset += 1;

	if ( marker_tree )
	{
		proto_tree_add_uint(marker_tree, hf_tns_marker_data_byte, tvb,
			offset, 1, tvb_get_ntohs(tvb, offset));
	}
	offset += 1;

	return;
}

static void dissect_tns_redirect(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree)
{
	proto_tree *redirect_tree = NULL, *ti;

	if ( tree )
	{
		ti = proto_tree_add_text(tns_tree, tvb, offset,
		    tvb_length_remaining(tvb, offset), "Redirect");
		redirect_tree = proto_item_add_subtree(ti, ett_tns_redirect);

		proto_tree_add_boolean_hidden(tns_tree, hf_tns_redirect, tvb,
		    0, 0, TRUE);
	}
		
	if ( check_col(pinfo->fd, COL_INFO) )
	{
		col_append_str(pinfo->fd, COL_INFO, ", Redirect");
	}

	if ( redirect_tree )
	{
		proto_tree_add_uint(redirect_tree, hf_tns_redirect_data_length, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( redirect_tree )
	{
		proto_tree_add_string(redirect_tree, hf_tns_redirect_data, tvb,
			offset, tvb_length(tvb)-offset, 
			tvb_get_ptr(tvb, offset, tvb_length(tvb)-offset));
	}
	return;
}

static void dissect_tns_control(tvbuff_t *tvb, int offset, packet_info *pinfo,
	proto_tree *tree, proto_tree *tns_tree)
{
	proto_tree *control_tree = NULL, *ti;

	if ( tree )
	{
		ti = proto_tree_add_text(tns_tree, tvb, offset,
		    tvb_length_remaining(tvb, offset), "Control");
		control_tree = proto_item_add_subtree(ti, ett_tns_control);

		proto_tree_add_boolean_hidden(tns_tree, hf_tns_control, tvb,
		    0, 0, TRUE);
	}
		
	if ( check_col(pinfo->fd, COL_INFO) )
	{
		col_append_str(pinfo->fd, COL_INFO, ", Control");
	}

	if ( control_tree )
	{
		proto_tree_add_uint(control_tree, hf_tns_control_cmd, tvb,
			offset, 2, tvb_get_ntohs(tvb, offset));
	}
	offset += 2;

	if ( control_tree )
	{
		proto_tree_add_string(control_tree, hf_tns_control_data, tvb,
			offset, tvb_length(tvb)-offset, 
			tvb_get_ptr(tvb, offset, tvb_length(tvb)-offset));
	}
	return;
}



static void
dissect_tns(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	proto_tree      *tns_tree = NULL, *ti;
	int offset = 0;
	guint16 length;
	guint16 type;

	if (check_col(pinfo->fd, COL_PROTOCOL))
		col_set_str(pinfo->fd, COL_PROTOCOL, "TNS");

	if (check_col(pinfo->fd, COL_INFO))
	{
		col_add_str(pinfo->fd, COL_INFO,
			(pinfo->match_port == pinfo->destport) ? "Request" : "Response");	  
	}

	if (tree) 
	{
		ti = proto_tree_add_item(tree, proto_tns, tvb, 0,
		    tvb_length(tvb), FALSE);
		tns_tree = proto_item_add_subtree(ti, ett_tns);

		if (pinfo->match_port == pinfo->destport)
		{
			proto_tree_add_boolean_hidden(tns_tree, hf_tns_request,
			   tvb, offset, tvb_length(tvb), TRUE);
		}
		else
		{
			proto_tree_add_boolean_hidden(tns_tree, hf_tns_response,
			    tvb, offset, tvb_length(tvb), TRUE);
		}
	}

	length = tvb_get_ntohs(tvb, offset);
	if (tree)
	{
		proto_tree_add_uint(tns_tree, hf_tns_length, tvb,
			offset, 2, length);
	}
	offset += 2;

	if ( tree )
	{
		proto_tree_add_item(tns_tree, hf_tns_packet_checksum, tvb,
			offset, 2, FALSE);
	}
	offset += 2;

	type = tvb_get_guint8(tvb, offset);
	if ( tree )
	{
		proto_tree_add_uint(tns_tree, hf_tns_packet_type, tvb,
			offset, 1, type);
	}
	offset += 1;

	if ( check_col(pinfo->fd, COL_INFO))
	{
		col_append_fstr(pinfo->fd, COL_INFO, ", %s (%u)",
			val_to_str(type, tns_type_vals, "Unknown"), type);
	}

	if ( tree )
	{
		proto_tree_add_item(tns_tree, hf_tns_reserved_byte, tvb,
			offset, 1, FALSE);
	}
	offset += 1;

	if ( tree )
	{
		proto_tree_add_item(tns_tree, hf_tns_header_checksum, tvb,
			offset, 2, FALSE);
	}
	offset += 2;

	switch (type)
	{
		case TNS_TYPE_CONNECT:
			dissect_tns_connect(tvb,offset,pinfo,tree,tns_tree);
			break;
		case TNS_TYPE_ACCEPT:
			dissect_tns_accept(tvb,offset,pinfo,tree,tns_tree);
			break;
		case TNS_TYPE_REFUSE:
			dissect_tns_refuse(tvb,offset,pinfo,tree,tns_tree);
			break;
		case TNS_TYPE_REDIRECT:
			dissect_tns_redirect(tvb,offset,pinfo,tree,tns_tree);
			break;
		case TNS_TYPE_ABORT:
			dissect_tns_abort(tvb,offset,pinfo,tree,tns_tree);
			break;
		case TNS_TYPE_MARKER:
			dissect_tns_marker(tvb,offset,pinfo,tree,tns_tree, 0);
			break;
		case TNS_TYPE_ATTENTION:
			dissect_tns_marker(tvb,offset,pinfo,tree,tns_tree, 1);
			break;
		case TNS_TYPE_CONTROL:
			dissect_tns_control(tvb,offset,pinfo,tree,tns_tree);
			break;
		case TNS_TYPE_DATA:
			dissect_tns_data(tvb,offset,pinfo,tree,tns_tree);
			break;
		default:
			dissect_data(tvb,offset,pinfo,tns_tree);
	}
}

void proto_register_tns(void)
{
	static hf_register_info hf[] = {
		{ &hf_tns_response, { 
			"Response", "tns.response", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "TRUE if TNS response", HFILL }},
		{ &hf_tns_request, { 
			"Request", "tns.request", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "TRUE if TNS request", HFILL }},
		{ &hf_tns_length, { 	
			"Packet Length", "tns.length", FT_UINT32, BASE_DEC, 
			NULL, 0x0, "Length of TNS packet", HFILL }},
		{ &hf_tns_packet_checksum, { 	
			"Packet Checksum", "tns.packet_checksum", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Checksum of Packet Data", HFILL }},
		{ &hf_tns_header_checksum, { 	
			"Header Checksum", "tns.header_checksum", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Checksum of Header Data", HFILL }},
			
		{ &hf_tns_version, { 	
			"Version", "tns.version", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Version", HFILL }},
		{ &hf_tns_compat_version, { 	
			"Version (Compatible)", "tns.compat_version", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Version (Compatible)", HFILL }},
		{ &hf_tns_service_options, { 	
			"Service Options", "tns.service_options", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Service Options", HFILL }},
		{ &hf_tns_sdu_size, { 	
			"Session Data Unit Size", "tns.sdu_size", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Session Data Unit Size", HFILL }},
		{ &hf_tns_max_tdu_size, { 	
			"Maximum Transmission Data Unit Size", "tns.max_tdu_size", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Maximum Transmission Data Unit Size", HFILL }},
		{ &hf_tns_nt_proto_characteristics, { 	
			"NT Protocol Characteristics", "tns.nt_proto_characteristics", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "NT Protocol Characteristics", HFILL }},
		{ &hf_tns_line_turnaround, { 	
			"Line Turnaround Value", "tns.line_turnaround", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Line Turnaround Value", HFILL }},
		{ &hf_tns_value_of_one, { 	
			"Value of 1 in Hardware", "tns.value_of_one", FT_BYTES, BASE_NONE, 
			NULL, 0x0, "Value of 1 in Hardware", HFILL }},		

		{ &hf_tns_connect, { 
			"Connect", "tns.connect", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Connect", HFILL }},
		{ &hf_tns_connect_data_length, { 	
			"Length of Connect Data", "tns.connect_data_length", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Length of Connect Data", HFILL }},
		{ &hf_tns_connect_data_offset, { 	
			"Offset to Connect Data", "tns.connect_data_offset", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Offset to Connect Data", HFILL }},
		{ &hf_tns_connect_data_max, { 	
			"Maximum Receivable Connect Data", "tns.connect_data_max", FT_UINT32, BASE_DEC, 
			NULL, 0x0, "Maximum Receivable Connect Data", HFILL }},
		{ &hf_tns_connect_flags0, { 	
			"Connect Flags 0", "tns.connect_flags0", FT_UINT8, BASE_HEX, 
			NULL, 0x0, "Connect Flags 0", HFILL }},
		{ &hf_tns_connect_flags1, { 	
			"Connect Flags 1", "tns.connect_flags1", FT_UINT8, BASE_HEX, 
			NULL, 0x0, "Connect Flags 1", HFILL }},
		{ &hf_tns_trace_cf1, { 	
			"Trace Cross Facility Item 1", "tns.trace_cf1", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Trace Cross Facility Item 1", HFILL }},
		{ &hf_tns_trace_cf2, { 	
			"Trace Cross Facility Item 2", "tns.trace_cf2", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Trace Cross Facility Item 2", HFILL }},
		{ &hf_tns_trace_cid, { 	
			"Trace Unique Connection ID", "tns.trace_cid", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Trace Unique Connection ID", HFILL }},
		{ &hf_tns_connect_data, { 	
			"Connect Data", "tns.connect_data", FT_STRING, BASE_NONE, 
			NULL, 0x0, "Connect Data", HFILL }},

		{ &hf_tns_accept, { 
			"Accept", "tns.accept", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Accept", HFILL }},		
		{ &hf_tns_accept_data_length, { 	
			"Accept Data Length", "tns.accept_data_length", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Length of Accept Data", HFILL }},
		{ &hf_tns_accept_data, { 	
			"Accept Data", "tns.accept_data", FT_STRING, BASE_NONE, 
			NULL, 0x0, "Accept Data", HFILL }},
		{ &hf_tns_accept_data_offset, { 	
			"Offset to Accept Data", "tns.accept_data_offset", FT_UINT16, BASE_DEC, 
			NULL, 0x0, "Offset to Accept Data", HFILL }},


		{ &hf_tns_refuse, { 
			"Refuse", "tns.refuse", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Refuse", HFILL }},		
		{ &hf_tns_refuse_reason_user, { 	
			"Refuse Reason (User)", "tns.refuse_reason_user", FT_UINT8, BASE_HEX, 
			NULL, 0x0, "Refuse Reason from Application", HFILL }},
		{ &hf_tns_refuse_reason_system, { 	
			"Refuse Reason (User)", "tns.refuse_reason_system", FT_UINT8, BASE_HEX, 
			NULL, 0x0, "Refuse Reason from System", HFILL }},
		{ &hf_tns_refuse_data_length, { 	
			"Refuse Data Length", "tns.refuse_data_length", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Length of Refuse Data", HFILL }},
		{ &hf_tns_refuse_data, { 	
			"Refuse Data", "tns.refuse_data", FT_STRING, BASE_NONE, 
			NULL, 0x0, "Refuse Data", HFILL }},

		{ &hf_tns_abort, { 
			"Abort", "tns.abort", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Abort", HFILL }},		
		{ &hf_tns_abort_reason_user, { 	
			"Abort Reason (User)", "tns.abort_reason_user", FT_UINT8, BASE_HEX, 
			NULL, 0x0, "Abort Reason from Application", HFILL }},
		{ &hf_tns_abort_reason_system, { 	
			"Abort Reason (User)", "tns.abort_reason_system", FT_UINT8, BASE_HEX, 
			NULL, 0x0, "Abort Reason from System", HFILL }},
		{ &hf_tns_abort_data, { 	
			"Abort Data", "tns.abort_data", FT_STRING, BASE_NONE, 
			NULL, 0x0, "Abort Data", HFILL }},

		{ &hf_tns_marker, { 
			"Marker", "tns.marker", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Marker", HFILL }},				
		{ &hf_tns_marker_type, { 	
			"Marker Type", "tns.marker.type", FT_UINT8, BASE_HEX, 
			VALS(tns_marker_types), 0x0, "Marker Type", HFILL }},
		{ &hf_tns_marker_data_byte, { 	
			"Marker Data Byte", "tns.marker.databyte", FT_UINT8, BASE_HEX, 
			NULL, 0x0, "Marker Data Byte", HFILL }},
		{ &hf_tns_marker_data, { 	
			"Marker Data", "tns.marker.data", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Marker Data", HFILL }},

		{ &hf_tns_control, { 
			"Control", "tns.control", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Control", HFILL }},		
		{ &hf_tns_control_cmd, { 	
			"Control Command", "tns.control.cmd", FT_UINT16, BASE_HEX, 
			VALS(tns_control_cmds), 0x0, "Control Command", HFILL }},
		{ &hf_tns_control_data, { 	
			"Control Data", "tns.control.data", FT_BYTES, BASE_HEX, 
			NULL, 0x0, "Control Data", HFILL }},

		{ &hf_tns_redirect, { 
			"Redirect", "tns.redirect", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Redirect", HFILL }},		
		{ &hf_tns_redirect_data_length, { 	
			"Redirect Data Length", "tns.redirect_data_length", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Length of Redirect Data", HFILL }},
		{ &hf_tns_redirect_data, { 	
			"Redirect Data", "tns.redirect_data", FT_STRING, BASE_NONE, 
			NULL, 0x0, "Redirect Data", HFILL }},

		{ &hf_tns_data, { 
			"Data", "tns.data", FT_BOOLEAN, BASE_NONE, 
			NULL, 0x0, "Data", HFILL }},		
		{ &hf_tns_data_flag, { 	
			"Data Flag", "tns.data_flag", FT_UINT16, BASE_HEX, 
			NULL, 0x0, "Data Flag", HFILL }},
		{ &hf_tns_data_flag_send, { 	
			"Send Token", "tns.data_flag.send", FT_UINT16, BASE_BIN, 
			NULL, 0x1, "Send Token", HFILL }},
		{ &hf_tns_data_flag_rc, { 	
			"Request Confirmation", "tns.data_flag.rc", FT_UINT16, BASE_BIN, 
			NULL, 0x2, "Request Confirmation", HFILL }},
		{ &hf_tns_data_flag_c, { 	
			"Confirmation", "tns.data_flag.c", FT_UINT16, BASE_BIN, 
			NULL, 0x4, "Confirmation", HFILL }},
		{ &hf_tns_data_flag_reserved, { 	
			"Reserved", "tns.data_flag.reserved", FT_UINT16, BASE_BIN, 
			NULL, 0x8, "Reserved", HFILL }},
		{ &hf_tns_data_flag_more, { 	
			"More Data to Come", "tns.data_flag.more", FT_UINT16, BASE_BIN, 
			NULL, 0x20, "More Data to Come", HFILL }},
		{ &hf_tns_data_flag_eof, { 	
			"End of File", "tns.data_flag.eof", FT_UINT16, BASE_BIN, 
			NULL, 0x40, "End of File", HFILL }},
		{ &hf_tns_data_flag_dic, { 	
			"Do Immediate Confirmation", "tns.data_flag.dic", FT_UINT16, BASE_BIN, 
			NULL, 0x80, "Do Immediate Confirmation", HFILL }},
		{ &hf_tns_data_flag_rts, { 	
			"Request To Send", "tns.data_flag.rts", FT_UINT16, BASE_BIN, 
			NULL, 0x100, "Request To Send", HFILL }},
		{ &hf_tns_data_flag_sntt, { 	
			"Send NT Trailer", "tns.data_flag.sntt", FT_UINT16, BASE_BIN, 
			NULL, 0x200, "Send NT Trailer", HFILL }},


		{ &hf_tns_reserved_byte, { 	
			"Reserved Byte", "tns.reserved_byte", FT_BYTES, BASE_HEX, 
			NULL, 0x0, "Reserved Byte", HFILL }},
		{ &hf_tns_packet_type, { 	
			"Packet Type", "tns.type", FT_UINT8, BASE_DEC, 
			VALS(tns_type_vals), 0x0, "Type of TNS packet", HFILL }}	

	};

	static gint *ett[] = {
		&ett_tns,
		&ett_tns_connect,
		&ett_tns_accept,
		&ett_tns_refuse,
		&ett_tns_abort,
		&ett_tns_redirect,
		&ett_tns_marker,
		&ett_tns_attention,
		&ett_tns_control,
		&ett_tns_data,
		&ett_tns_data_flag,
		&ett_sql
	};
	proto_tns = proto_register_protocol(
		"Transparent Network Substrate Protocol", "TNS", "tns");
	proto_register_field_array(proto_tns, hf, array_length(hf));
	proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_tns(void)
{
	dissector_add("tcp.port", TCP_PORT_TNS, dissect_tns, proto_tns);
}