/
Qv24_P25NX.lua
717 lines (687 loc) · 42.7 KB
/
Qv24_P25NX.lua
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
-- Simple Quantar Dissector UDP for P25NX
-- Copyright 2016 John Yaldwyn ZL4JY
-- Release version 2 November 2016 for testing
-- This dissector contains the resutls of investigative work by:
-- Matt Ames (né Robert) VK2LK, Tony Casciato KT9AC, John Yaldwyn ZL4JY,
-- and anonymous contributors. Input also from DG9BEW.
-- 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, see:
-- http://www.gnu.org/licenses/
-- The use of Wireshark's API are covered by GPL
-- The UDP dissector looks at Cisco STUN encapsualted V.24 frames carried P25NX V2 style.
--
-- Create QV24 protocol and its fields
--
p_QV24 = Proto ("QV24_P25NX","Quantar V.24 over TCP or UDP - P25NX")
local hdr_fields =
{
stun_payload_length = ProtoField.new (
"Payload Length",
"cisco_stun.payload_length" ,
ftypes.UINT8
),
stun_id = ProtoField.new (
"STUN ID",
"cisco_stun.id" ,
ftypes.UINT8
),
hdlc_address = ProtoField.new (
"HDLC Address",
"hdlc.address" ,
ftypes.UINT8
),
hdlc_control_field = ProtoField.new (
"Control Field",
"hdlc.control_field" ,
ftypes.UINT8,
nil,
base.HEX,
0xFF
),
hdlc_poll_final = ProtoField.new (
"Poll/Final",
"hdlc.poll_final" ,
ftypes.UINT8,
{
[0] = "Poll",
[1] = "Final"
},
base.HEX,
0x10
),
hdlc_frame_type_informational = ProtoField.new (
"Frame Type",
"hdlc.frame_type" ,
ftypes.UINT8,
{
[0] = "Informational Frame",
[1] = "Supervisory Frame",
[2] = "Informational Frame",
[3] = "Unnumbered Frame"
},
base.HEX,
0x01
),
hdlc_frame_type_supervisory = ProtoField.new (
"Frame Type",
"hdlc.frame_type" ,
ftypes.UINT8,
{
[0] = "Informational Frame",
[1] = "Supervisory Frame",
[2] = "Informational Frame",
[3] = "Unnumbered Frame"
},
base.HEX,
0x03
),
hdlc_frame_type_unnumbered = ProtoField.new (
"Frame Type",
"hdlc.frame_type" ,
ftypes.UINT8,
{
[0] = "Informational Frame",
[1] = "Supervisory Frame",
[2] = "Informational Frame",
[3] = "Unnumbered Frame"
},
base.HEX,
0x03
),
hdlc_function_bits_supervisory = ProtoField.new (
"Function Bits",
"hdlc.function_bits" ,
ftypes.UINT8,
{
[0] = "Receive-Ready",
[1] = "Receive-Not-Ready",
[2] = "Reject",
[3] = "Selective-Reject"
},
base.HEX,
0x0c
),
hdlc_function_bits_unnumbered = ProtoField.new (
"Function Bits",
"hdlc.function_bits",
ftypes.UINT8,
{
[0] = "Unnumbered Information",
[1] = "Set/Request Init.Mode",
[2] = "",
[3] = "Set Async. Response Mode"
},
base.HEX,
0xec
),
p25_frametype = ProtoField.new (
"Frame Type",
"qv24_p25nx.frametype",
ftypes.UINT8,
{
[0x00] = "NID Start/Stop",
[0x60] = "Voice Header Part 1",
[0x61] = "Voice Header Part 2",
[0x62] = "IMBE Voice 1",
[0x63] = "IMBE Voice 2",
[0x64] = "IMBE Voice 3 + Link Control",
[0x65] = "IMBE Voice 4 + Link Control",
[0x66] = "IMBE Voice 5 + Link Control",
[0x67] = "IMBE Voice 6 + Link Control",
[0x68] = "IMBE Voice 7 + Link Control",
[0x69] = "IMBE Voice 8 + Link Control",
[0x6a] = "IMBE Voice 9 + Low Speed Data",
[0x6b] = "IMBE Voice 10",
[0x6c] = "IMBE Voice 11",
[0x6d] = "IMBE Voice 12 + Encryption Sync",
[0x6e] = "IMBE Voice 13 + Encryption Sync",
[0x6f] = "IMBE Voice 14 + Encryption Sync",
[0x70] = "IMBE Voice 15 + Encryption Sync",
[0x71] = "IMBE Voice 16 + Encryption Sync",
[0x72] = "IMBE Voice 17 + Encryption Sync",
[0x73] = "IMBE Voice 18 + Low Speed Data",
[0xa1] = "Page call frame",
},
base.HEX
),
p25_rt_rt_enabled = ProtoField.new ("RT/RT enabled", "qv24_p25nx.rt_rt", ftypes.UINT8, {
[0x02] = "RT/RT enabled",
[0x04] = "RT/RT disabled",
}, base.HEX),
p25_site_number = ProtoField.new ("Site Number", "qv24_p25nx.site_number", ftypes.UINT8, {
[0x1b] = "Quantar",
[0x00] = "DIU 3000",
}, base.HEX),
p25_voice_page = ProtoField.new ("Voice/Page", "qv24_p25nx.voice_page", ftypes.UINT8, {
[0x0b] = "Voice",
[0x0f] = "Page",
}, base.HEX),
p25_rssi = ProtoField.new ("RSSI", "qv24_p25nx.rssi" , ftypes.UINT8),
p25_inverse_signal = ProtoField.new ("Inverse Signal", "qv24_p25nx.inverse_signal" , ftypes.UINT8),
p25_candidate_adj_mm = ProtoField.new ("Candidate adjusted MM", "qv24_p25nx.candidate_adj_mm", ftypes.UINT8),
p25_last_byte = ProtoField.new ("Last Byte", "qv24_p25nx.last_byte", ftypes.UINT8),
p25_lcf = ProtoField.new (
"Link Control Format",
"qv24_p25nx.lcf",
ftypes.UINT8,
{
[0x00] = "Group Voice Channel User",
[0x42] = "Group Voice Channel Update",
[0x03] = "Unit to Unit Voice Channel User",
[0x44] = "Group Voice Channel Update - Explicit",
[0x45] = "Unit to Unit Answer Request",
[0x46] = "Telephone Interconnect Voice Channel User",
[0x47] = "Telephone Interconnect Answer Request",
[0x4F] = "Call Termination/Cancellation",
[0x50] = "Group Affiliation Query",
[0x51] = "Unit Registration Command",
[0x52] = "Unit Authentication Command",
[0x53] = "Status Query",
[0x60] = "System Service Broadcast",
[0x61] = "Secondary Control Channel Broadcast",
[0x62] = "Adjacent Site Status Broadcast",
[0x63] = "RFSS Status Broadcast",
[0x64] = "Network Status Broadcast",
[0x54] = "Status Update",
[0x55] = "Message Update",
[0x56] = "Call Alert",
[0x57] = "Extended Function Command",
[0x58] = "Channel Identifier Update",
[0x65] = "Protection Parameter Broadcast",
[0x66] = "Secondary Control Channel Broadcast - Explicit (LCSCBX)",
[0x67] = "Adjacent Site Status Broadcast – Explicit (LCASBX)",
[0x59] = "Channel Identifier Update – Explicit (LCCIUX)",
[0x68] = "RFSS Status Broadcast – Explicit (LCRSBX)",
[0x69] = "Network Status Broadcast – Explicit (LCNSBX)",
[0x80] = "Encrypted Group Voice Channel User",
[0xc2] = "Encrypted Group Voice Channel Update",
[0x83] = "Encrypted Unit to Unit Voice Channel User",
[0xc4] = "Encrypted Group Voice Channel Update - Explicit",
[0xc5] = "Encrypted Unit to Unit Answer Request",
[0xc6] = "Encrypted Telephone Interconnect Voice Channel User",
[0xc7] = "Encrypted Telephone Interconnect Answer Request",
[0xcF] = "Encrypted Call Termination/Cancellation",
[0xd0] = "Encrypted Group Affiliation Query",
[0xd1] = "Encrypted Unit Registration Command",
[0xd2] = "Encrypted Unit Authentication Command",
[0xd3] = "Encrypted Status Query",
[0xe0] = "Encrypted System Service Broadcast",
[0xe1] = "Encrypted Secondary Control Channel Broadcast",
[0xe2] = "Encrypted Adjacent Site Status Broadcast",
[0xe3] = "Encrypted RFSS Status Broadcast",
[0xe4] = "Encrypted Network Status Broadcast",
[0xd4] = "Encrypted Status Update",
[0xd5] = "Encrypted Message Update",
[0xd6] = "Encrypted Call Alert",
[0xd7] = "Encrypted Extended Function Command",
[0xd8] = "Encrypted Channel Identifier Update",
[0xe5] = "Encrypted Protection Parameter Broadcast",
},
base.HEX,
0xFF
),
p25_lcf_protected_flag = ProtoField.new (
"Protected Flag",
"qv24_p25nx.lcf_protected_flag",
ftypes.UINT8,
{
[0] = "Not encrypted",
[1] = "Encrypted",
},
base.HEX,
0x80
),
p25_lcf_mfid_format = ProtoField.new (
"Implicit / Explicit MFID Format",
"qv24_p25nx.lcf_mfid_format",
ftypes.UINT8,
{
[0] = "Implicit, MFID 0 is implied",
[1] = "Explicit",
},
base.HEX,
0x40
),
p25_lcf_link_control_opcode = ProtoField.new (
"Link Control Opcode",
"qv24_p25nx.lcf_link_control_opcode",
ftypes.UINT8,
{},
base.HEX,
0x3F
),
p25_mfid = ProtoField.new (
"Manufacturer's ID",
"qv24_p25nx.mfid",
ftypes.UINT8,
{
[0x00] = "default value",
[0x01] = "another default value",
[0x09] = "Aselsan Inc.",
[0x10] = "Relm/BK Radio",
[0x18] = "Airbus",
[0x20] = "Cycomm",
[0x28] = "Efratom",
[0x30] = "Com-Net Ericsson",
[0x34] = "Etherstack",
[0x38] = "Datron",
[0x40] = "Icom",
[0x48] = "Garmin",
[0x50] = "GTE",
[0x55] = "IFR Systems",
[0x5A] = "INIT Innovations",
[0x60] = "GEC-Marconi",
[0x64] = "Harris Corp (inactive)",
[0x68] = "Kenwood",
[0x70] = "Glenayre Electronics",
[0x74] = "Japan Radio Co.",
[0x78] = "Kokusai",
[0x7c] = "Maxon",
[0x80] = "Midland",
[0x86] = "Daniels Electronics",
[0x90] = "Motorola",
[0xa0] = "Thales",
[0xa4] = "Harris Corporation",
[0xAA] = "NRPC",
[0xb0] = "Raytheon",
[0xc0] = "SEA",
[0xc8] = "Securicor",
[0xd0] = "ADI",
[0xD8] = "Tait Electronics",
[0xe0] = "Teletec",
[0xf0] = "Transcrypt International",
[0xF8] = "Vertex Standard",
[0xFC] = "Zetron, Inc.",
},
base.HEX
),
p25_service_options = ProtoField.new (
"Service Options",
"qv24_p25nx.service_options",
ftypes.UINT8,
{},
base.HEX,
0xFF
),
p25_service_options_emergency = ProtoField.new (
"Emergency Flag",
"qv24_p25nx.service_options_emergency",
ftypes.UINT8,
{
[0] = "Normal or non-emergency status",
[1] = "Emergency status requiring special processing",
},
base.HEX,
0x80
),
p25_service_options_protected = ProtoField.new (
"Protected Flag",
"qv24_p25nx.service_options_protected",
ftypes.UINT8,
{
[0] = "non protected mode",
[1] = "protected mode",
},
base.HEX,
0x40
),
p25_service_options_duplex = ProtoField.new (
"Duplex Flag",
"qv24_p25nx.service_options_duplex",
ftypes.UINT8,
{
[0] = "half duplex, the subscriber unit will be capable of transmitting but not simultaneously receiving on the assigned channel",
[1] = "full duplex, the subscriber unit will be capable of transmitting and receiving simultaneously on the assigned channel",
},
base.HEX,
0x20
),
p25_service_options_mode = ProtoField.new (
"Data Mode Flag",
"qv24_p25nx.service_options_mode",
ftypes.UINT8,
{
[0] = "circuit mode - the resources shall support circuit switch operation",
[1] = "packet mode - the resources shall support packet switch operation",
},
base.HEX,
0x10
),
p25_service_options_priority = ProtoField.new (
"Priority",
"qv24_p25nx.service_options_priority",
ftypes.UINT8,
{},
base.HEX,
0x07
),
p25_target_address = ProtoField.new (
"Target Address/Radio ID",
"qv24_p25nx.target_address",
ftypes.UINT24,
{
[1] = "Local",
[10100] = "Worldwide",
[10101] = "WW Tac1",
[10102] = "WW Tac2",
[10103] = "WW Tac3",
[10200] = "North America",
[10201] = "NORTAC1",
[10202] = "NORTAC2",
[10203] = "NORTAC3",
[10235] = "Florida",
[10250] = "California",
[10251] = "NorCal",
[10252] = "SoCal",
[10300] = "Europe",
[10301] = "EURTAC1",
[10302] = "EURTAC2",
[10303] = "EURTAC4",
[10310] = "France",
[10320] = "Germany",
[10400] = "Pacific",
[10401] = "PACTAC1",
[10402] = "PACTAC2",
[10403] = "PACTAC3",
},
base.DEC
),
p25_source_address = ProtoField.new (
"Source Address/Radio ID",
"qv24_p25nx.source_address",
ftypes.UINT24,
p25_radio_ids,
base.DEC
),
p25_low_speed_data = ProtoField.new (
"Low speed data",
"qv24_p25nx.low_speed_data",
ftypes.UINT16,
{},
base.HEX
),
p25_enc_iv = ProtoField.new (
"Encryption initialization vector/Message Indicator",
"qv24_p25nx.enc_iv",
ftypes.BYTES,
{},
base.NONE
),
p25_algid = ProtoField.new (
"Algorithm ID",
"qv24_p25nx.algid",
ftypes.UINT8,
{
[0x00] = "ACCORDION 1.3",
[0x01] = "BATON (Auto Even)",
[0x02] = "FIREFLY Type 1",
[0x03] = "MAYFLY Type 1",
[0x04] = "SAVILLE",
[0x41] = "BATON (Auto Odd)",
[0x80] = "Unencrypted",
[0x81] = "DES",
[0x83] = "Triple DES",
[0x84] = "AES 256",
[0x85] = "AES 128 GCM",
[0x88] = "AES CBC",
[0x9F] = "DES-XL",
[0xA0] = "DVI-XL",
[0xA1] = "DVP-XL",
[0xAA] = "ADP",
},
base.HEX
),
p25_keyid = ProtoField.new (
"Key ID",
"qv24_p25nx.keyid",
ftypes.UINT16,
{},
base.HEX
),
}
p_QV24.fields = hdr_fields
--
-- QV24 dissector function
--
function p_QV24.dissector (buf, pkt, root)
--
-- Validate packet length is adequate, otherwise quit
--
local pktlen = buf:len()
if pktlen < 7 then
-- frame to short to contains STUN
return 0
end
local bytes_consumed = 0
while bytes_consumed < pktlen do
local stun_tvbr = buf(0 + bytes_consumed, 7)
local stun_payload_length_tvbr = stun_tvbr(5, 1)
local stun_payload_length = stun_payload_length_tvbr:uint()
local stun_id_tvbr = stun_tvbr(6, 1)
local stun_id = stun_id_tvbr:uint()
local stun_payload_tvbr = buf(7 + bytes_consumed, stun_payload_length)
local stun_tree = root:add(stun_tvbr, "Cisco STUN")
stun_tree:add(hdr_fields.stun_id, stun_id_tvbr)
stun_tree:add(hdr_fields.stun_payload_length, stun_payload_length_tvbr)
pkt.cols.info:set("Cisco STUN")
pkt.cols.protocol:set("Cisco STUN")
if stun_payload_tvbr:len() >= 2 then
local hdlc_tvbr = stun_payload_tvbr(0, 2)
local hdlc_address_tvbr = hdlc_tvbr(0, 1)
local hdlc_address = hdlc_address_tvbr:uint()
local hdlc_control_field_tvbr = hdlc_tvbr(1, 1)
local hdlc_control_field = hdlc_control_field_tvbr:uint()
local hdlc_tree = root:add(hdlc_tvbr, "Quantar HDLC")
pkt.cols.info:set("Quantar HDLC")
pkt.cols.protocol:set("Quantar HDLC")
local frame_type_bits = 0
if hdlc_control_field % 2 > 0 then
if ((hdlc_control_field - (hdlc_control_field % 2)) / 2) % 2 > 0 then
-- Unnumbered frame
frame_type_bits = 3
hdlc_tree:add(hdr_fields.hdlc_frame_type_unnumbered, hdlc_control_field_tvbr)
hdlc_tree:add(hdr_fields.hdlc_function_bits_unnumbered, hdlc_control_field_tvbr)
else
-- Supervisory frame
frame_type_bits = 1
hdlc_tree:add(hdr_fields.hdlc_frame_type_supervisory, hdlc_control_field_tvbr)
hdlc_tree:add(hdr_fields.hdlc_function_bits_supervisory, hdlc_control_field_tvbr)
local function_bits = hdlc_control_field_tvbr:bitfield(4,2)
if function_bits == 0 then
pkt.cols.info:set("Receive-Ready")
elseif function_bits == 1 then
pkt.cols.info:set("Receive-Not-Ready")
elseif function_bits == 2 then
pkt.cols.info:set("Reject")
elseif function_bits == 3 then
pkt.cols.info:set("Selective-Reject")
end
end
else
-- Information frame
frame_type_bits = 0
hdlc_tree:add(hdr_fields.hdlc_frame_type_informational, hdlc_control_field_tvbr)
end
local poll_final = hdlc_control_field_tvbr:uint()
hdlc_tree:add(hdr_fields.hdlc_poll_final, hdlc_control_field_tvbr)
if stun_payload_tvbr:len() > 2 then
local p25_tvbr = stun_payload_tvbr(2)
pkt.cols.protocol:set(p_QV24.name)
local tree = root:add(p_QV24, p25_tvbr)
local frame_type_tvbr = p25_tvbr(0,1)
local frame_type = frame_type_tvbr:uint()
tree:add(hdr_fields.p25_frametype, frame_type_tvbr)
local frame_type_text = {
[0x00] = "NID Start/Stop",
[0x01] = "undefined",
[0x59] = "undefined",
[0x60] = "Voice Header Part 1",
[0x61] = "Voice Header Part 2",
[0x62] = "IMBE Voice 1",
[0x63] = "IMBE Voice 2",
[0x64] = "IMBE Voice 3 + Link Control",
[0x65] = "IMBE Voice 4 + Link Control",
[0x66] = "IMBE Voice 5 + Link Control",
[0x67] = "IMBE Voice 6 + Link Control",
[0x68] = "IMBE Voice 7 + Link Control",
[0x69] = "IMBE Voice 8 + Link Control",
[0x6a] = "IMBE Voice 9 + Low Speed Data",
[0x6b] = "IMBE Voice 10",
[0x6c] = "IMBE Voice 11",
[0x6d] = "IMBE Voice 12 + Encryption Sync",
[0x6e] = "IMBE Voice 13 + Encryption Sync",
[0x6f] = "IMBE Voice 14 + Encryption Sync",
[0x70] = "IMBE Voice 15 + Encryption Sync",
[0x71] = "IMBE Voice 16 + Encryption Sync",
[0x72] = "IMBE Voice 17 + Encryption Sync",
[0x73] = "IMBE Voice 18 + Low Speed Data",
[0xa1] = "Page call frame",
}
pkt.cols.info:set(frame_type_text[frame_type])
if frame_type == 0x00 then
local p25_rt_rt_enabled_tvbr = p25_tvbr(2,1)
local rt_rt_enabled = p25_rt_rt_enabled_tvbr:uint()
tree:add(hdr_fields.p25_rt_rt_enabled, p25_rt_rt_enabled_tvbr)
local p25_voice_page_tvbr = p25_tvbr(4,1)
local voice_page = p25_voice_page_tvbr:uint()
tree:add(hdr_fields.p25_voice_page, p25_voice_page_tvbr)
if p25_tvbr(3,1):uint() == 0x0c then
pkt.cols.info:set("ICW start")
elseif p25_tvbr(3,1):uint() == 0x25 then
pkt.cols.info:set("ICW terminate")
end
elseif frame_type == 0x60 then
local p25_rt_rt_enabled_tvbr = p25_tvbr(2,1)
tree:add(hdr_fields.p25_rt_rt_enabled, p25_rt_rt_enabled_tvbr)
local p25_voice_page_tvbr = p25_tvbr(4,1)
tree:add(hdr_fields.p25_voice_page, p25_voice_page_tvbr)
local p25_site_number_tvbr = p25_tvbr(5,1)
tree:add(hdr_fields.p25_site_number, p25_site_number_tvbr)
local p25_rssi_tvbr = p25_tvbr(6,1)
tree:add(hdr_fields.p25_rssi, p25_rssi_tvbr)
local p25_inverse_signal_tvbr = p25_tvbr(8,1)
tree:add(hdr_fields.p25_inverse_signal, p25_inverse_signal_tvbr)
elseif frame_type == 0x62 then
local p25_rt_rt_enabled_tvbr = p25_tvbr(2,1)
tree:add(hdr_fields.p25_rt_rt_enabled, p25_rt_rt_enabled_tvbr)
local p25_voice_page_tvbr = p25_tvbr(4,1)
tree:add(hdr_fields.p25_voice_page, p25_voice_page_tvbr)
local p25_site_number_tvbr = p25_tvbr(5,1)
tree:add(hdr_fields.p25_site_number, p25_site_number_tvbr)
local p25_rssi_tvbr = p25_tvbr(6,1)
tree:add(hdr_fields.p25_rssi, p25_rssi_tvbr)
local p25_inverse_signal_tvbr = p25_tvbr(8,1)
tree:add(hdr_fields.p25_inverse_signal, p25_inverse_signal_tvbr)
local p25_candidate_adj_mm_tvbr = p25_tvbr(9,1)
tree:add(hdr_fields.p25_candidate_adj_mm, p25_candidate_adj_mm_tvbr)
elseif frame_type == 0x63 then
local p25_last_byte_tvbr = p25_tvbr(13,1)
tree:add(hdr_fields.p25_last_byte, p25_last_byte_tvbr)
elseif frame_type == 0x64 then
local p25_lcf_tvbr = p25_tvbr(1,1)
tree:add(hdr_fields.p25_lcf, p25_lcf_tvbr)
tree:add(hdr_fields.p25_lcf_protected_flag, p25_lcf_tvbr)
tree:add(hdr_fields.p25_lcf_mfid_format, p25_lcf_tvbr)
tree:add(hdr_fields.p25_lcf_link_control_opcode, p25_lcf_tvbr)
local lcf_mfid_format = p25_lcf_tvbr:bitfield(1,1)
if lcf_mfid_format == 0 then
local p25_mfid_tvbr = p25_tvbr(2,1)
tree:add(hdr_fields.p25_mfid, p25_mfid_tvbr)
local p25_service_options_tvbr = p25_tvbr(3,1)
tree:add(hdr_fields.p25_service_options, p25_service_options_tvbr)
tree:add(hdr_fields.p25_service_options_emergency, p25_service_options_tvbr)
tree:add(hdr_fields.p25_service_options_protected, p25_service_options_tvbr)
tree:add(hdr_fields.p25_service_options_duplex, p25_service_options_tvbr)
tree:add(hdr_fields.p25_service_options_mode, p25_service_options_tvbr)
tree:add(hdr_fields.p25_service_options_priority, p25_service_options_tvbr)
else
tree:add("uncommon LCF, will be decoded in later version")
end
elseif frame_type == 0x65 then
local p25_target_address_tvbr = p25_tvbr(1,3)
tree:add(hdr_fields.p25_target_address, p25_target_address_tvbr)
elseif frame_type == 0x66 then
local p25_source_address_tvbr = p25_tvbr(1,3)
tree:add(hdr_fields.p25_source_address, p25_source_address_tvbr)
elseif frame_type == 0x67 then
elseif frame_type == 0x68 then
elseif frame_type == 0x69 then
elseif frame_type == 0x6a then
local p25_low_speed_data_tvbr = p25_tvbr(2,2)
tree:add(hdr_fields.p25_low_speed_data, p25_low_speed_data_tvbr)
elseif frame_type == 0x6b then
local p25_rt_rt_enabled_tvbr = p25_tvbr(2,1)
tree:add(hdr_fields.p25_rt_rt_enabled, p25_rt_rt_enabled_tvbr)
local p25_voice_page_tvbr = p25_tvbr(4,1)
tree:add(hdr_fields.p25_voice_page, p25_voice_page_tvbr)
local p25_site_number_tvbr = p25_tvbr(5,1)
tree:add(hdr_fields.p25_site_number, p25_site_number_tvbr)
local p25_rssi_tvbr = p25_tvbr(6,1)
tree:add(hdr_fields.p25_rssi, p25_rssi_tvbr)
local p25_inverse_signal_tvbr = p25_tvbr(8,1)
tree:add(hdr_fields.p25_inverse_signal, p25_inverse_signal_tvbr)
local p25_candidate_adj_mm_tvbr = p25_tvbr(9,1)
tree:add(hdr_fields.p25_candidate_adj_mm, p25_candidate_adj_mm_tvbr)
elseif frame_type == 0x6c then
elseif frame_type == 0x6d then
local p25_enc_iv_tvbr = p25_tvbr(1,3)
tree:add(hdr_fields.p25_enc_iv, p25_enc_iv_tvbr)
elseif frame_type == 0x6e then
local p25_enc_iv_tvbr = p25_tvbr(1,3)
tree:add(hdr_fields.p25_enc_iv, p25_enc_iv_tvbr)
elseif frame_type == 0x6f then
local p25_enc_iv_tvbr = p25_tvbr(1,3)
tree:add(hdr_fields.p25_enc_iv, p25_enc_iv_tvbr)
elseif frame_type == 0x70 then
local p25_algid_tvbr = p25_tvbr(1,1)
tree:add(hdr_fields.p25_algid, p25_algid_tvbr)
local p25_keyid_tvbr = p25_tvbr(2,2)
tree:add(hdr_fields.p25_keyid, p25_keyid_tvbr)
elseif frame_type == 0x71 then
elseif frame_type == 0x72 then
elseif frame_type == 0x73 then
local p25_low_speed_data_tvbr = p25_tvbr(2,2)
tree:add(hdr_fields.p25_low_speed_data, p25_low_speed_data_tvbr)
elseif frame_type == 0xa1 then
local emergency_flags_tvbr = p25_tvbr(9,1)
local emergency_flags = emergency_flags_tvbr:uint()
if emergency_flags == 0x9F then
tree:add(emergency_flags_tvbr, "Page")
local p25_source_address_tvbr = p25_tvbr(13,3)
tree:add(hdr_fields.p25_source_address, p25_source_address_tvbr)
local p25_target_address_tvbr = p25_tvbr(17,2)
tree:add(hdr_fields.p25_target_address, p25_target_address_tvbr)
elseif emergency_flags == 0xA7 then
tree:add(emergency_flags_tvbr, "EMERGENCY")
local p25_source_address_tvbr = p25_tvbr(16,3)
tree:add(hdr_fields.p25_source_address, p25_source_address_tvbr)
local p25_target_address_tvbr = p25_tvbr(14,2)
tree:add(hdr_fields.p25_target_address, p25_target_address_tvbr)
end
end
end
else
-- payload less than 2 bytes
return 0
end
bytes_consumed = bytes_consumed + stun_payload_length + 7
end
return bytes_consumed
end
--
-- Initialization routine
function p_QV24.init()
end
--
-- Register the chained dissector for UDP port 30000
local udp_dissector_table = DissectorTable.get("udp.port")
dissector = udp_dissector_table:get_dissector(30000)
udp_dissector_table:add(30000, p_QV24)
--
-- Register the chained dissector for TCP port 1994
local tcp_dissector_table = DissectorTable.get("tcp.port")
dissector = tcp_dissector_table:get_dissector(1994)
tcp_dissector_table:add(1994, p_QV24)
--
-- END