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Revert "TODO epan/dissectors/asn1/kerberos/packet-kerberos-template.c new GSS flags"
[wireshark-sm.git] / epan / dissectors / packet-lg8979.c
blob046b51a8a088247e95fd20c87cc0e3e2599b4ce6
1 /* packet-lg8979.c
2 * Routines for Landis & Gyr (Telegyr) 8979 Protocol (lg8979) Dissection
3 * By Chris Bontje (cbontje[AT]gmail.com
4 * Copyright 2013-2016
5 *
6 ************************************************************************************************
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
10 *
11 * SPDX-License-Identifier: GPL-2.0-or-later
12 */
13
14 #include "config.h"
15
16 #include <epan/packet.h>
17 #include "packet-tcp.h"
18 #include <epan/prefs.h>
19
20 void proto_register_lg8979(void);
21
22 /* Initialize the protocol and registered fields */
23 static int proto_lg8979;
24 static int hf_lg8979_header;
25 static int hf_lg8979_flags;
26 static int hf_lg8979_shr;
27 static int hf_lg8979_mfc;
28 static int hf_lg8979_ack;
29 static int hf_lg8979_con;
30 static int hf_lg8979_frz;
31 static int hf_lg8979_ind;
32 static int hf_lg8979_sch;
33 static int hf_lg8979_slg;
34 static int hf_lg8979_address;
35 static int hf_lg8979_lastblock;
36 static int hf_lg8979_funccode;
37 static int hf_lg8979_length;
38 static int hf_lg8979_start_ptnum16;
39 static int hf_lg8979_start_ptnum8;
40 static int hf_lg8979_stop_ptnum16;
41 static int hf_lg8979_stop_ptnum8;
42 static int hf_lg8979_ang_point;
43 static int hf_lg8979_adc_ref_zero;
44 static int hf_lg8979_adc_ref_neg90;
45 static int hf_lg8979_adc_ref_pos90;
46 static int hf_lg8979_ind_chgrpt_ptnum;
47 static int hf_lg8979_ind_chgrpt_status;
48 static int hf_lg8979_ind_chgrpt_change;
49 static int hf_lg8979_ind_frcrpt_status_b0;
50 static int hf_lg8979_ind_frcrpt_status_b1;
51 static int hf_lg8979_ind_frcrpt_status_b2;
52 static int hf_lg8979_ind_frcrpt_status_b3;
53 static int hf_lg8979_ind_frcrpt_status_b4;
54 static int hf_lg8979_ind_frcrpt_status_b5;
55 static int hf_lg8979_ind_frcrpt_status_b6;
56 static int hf_lg8979_ind_frcrpt_status_b7;
57 static int hf_lg8979_ind_frcrpt_change_b0;
58 static int hf_lg8979_ind_frcrpt_change_b1;
59 static int hf_lg8979_ind_frcrpt_change_b2;
60 static int hf_lg8979_ind_frcrpt_change_b3;
61 static int hf_lg8979_ind_frcrpt_change_b4;
62 static int hf_lg8979_ind_frcrpt_change_b5;
63 static int hf_lg8979_ind_frcrpt_change_b6;
64 static int hf_lg8979_ind_frcrpt_change_b7;
65 static int hf_lg8979_soe_chgrpt_ptnum;
66 static int hf_lg8979_soe_chgrpt_status;
67 static int hf_lg8979_soe_chgrpt_change;
68 static int hf_lg8979_soe_frcrpt_status_b0;
69 static int hf_lg8979_soe_frcrpt_status_b1;
70 static int hf_lg8979_soe_frcrpt_status_b2;
71 static int hf_lg8979_soe_frcrpt_status_b3;
72 static int hf_lg8979_soe_frcrpt_status_b4;
73 static int hf_lg8979_soe_frcrpt_status_b5;
74 static int hf_lg8979_soe_frcrpt_status_b6;
75 static int hf_lg8979_soe_frcrpt_status_b7;
76 static int hf_lg8979_soe_frcrpt_change_b0;
77 static int hf_lg8979_soe_frcrpt_change_b1;
78 static int hf_lg8979_soe_frcrpt_change_b2;
79 static int hf_lg8979_soe_frcrpt_change_b3;
80 static int hf_lg8979_soe_frcrpt_change_b4;
81 static int hf_lg8979_soe_frcrpt_change_b5;
82 static int hf_lg8979_soe_frcrpt_change_b6;
83 static int hf_lg8979_soe_frcrpt_change_b7;
84 static int hf_lg8979_digin_b0;
85 static int hf_lg8979_digin_b1;
86 static int hf_lg8979_digin_b2;
87 static int hf_lg8979_digin_b3;
88 static int hf_lg8979_digin_b4;
89 static int hf_lg8979_digin_b5;
90 static int hf_lg8979_digin_b6;
91 static int hf_lg8979_digin_b7;
92 static int hf_lg8979_digin_b8;
93 static int hf_lg8979_digin_b9;
94 static int hf_lg8979_digin_b10;
95 static int hf_lg8979_digin_b11;
96 static int hf_lg8979_digin_b12;
97 static int hf_lg8979_digin_b13;
98 static int hf_lg8979_digin_b14;
99 static int hf_lg8979_digin_b15;
100 static int hf_lg8979_acc_point;
101 static int hf_lg8979_soe_logchg_ptnum;
102 static int hf_lg8979_soe_logchg_newstat;
103 static int hf_lg8979_soe_logchg_mon;
104 static int hf_lg8979_soe_logchg_day;
105 static int hf_lg8979_soe_logchg_hour;
106 static int hf_lg8979_soe_logchg_min;
107 static int hf_lg8979_soe_logchg_sec;
108 static int hf_lg8979_soe_logchg_msec;
109 static int hf_lg8979_ang_output_val;
110 static int hf_lg8979_sbo_tripclose;
111 static int hf_lg8979_sbo_timercnt;
112 static int hf_lg8979_digout_data;
113 static int hf_lg8979_pul_output_base;
114 static int hf_lg8979_pul_output_dur;
115 static int hf_lg8979_pul_output_rl;
116 static int hf_lg8979_ang_deadband;
117 static int hf_lg8979_ang_group;
118 static int hf_lg8979_ang_group_pts;
119 static int hf_lg8979_acc_preset;
120 static int hf_lg8979_rtucfg_num_chassis;
121 static int hf_lg8979_rtucfg_chassis_num;
122 static int hf_lg8979_rtucfg_card_slot;
123 static int hf_lg8979_timesync_mon;
124 static int hf_lg8979_timesync_day;
125 static int hf_lg8979_timesync_hour;
126 static int hf_lg8979_timesync_min;
127 static int hf_lg8979_timesync_sec;
128 static int hf_lg8979_timesync_msec;
129 static int hf_lg8979_timebias_value;
130 static int hf_lg8979_timebias_proctime;
131 static int hf_lg8979_firmware_ver;
132 static int hf_lg8979_exprpt_code;
133 static int hf_lg8979_exprpt_parm;
134 static int hf_lg8979_disallowed_func;
135 static int hf_lg8979_crc16;
136
137 /* Initialize the subtree pointers */
138 static int ett_lg8979;
139 static int ett_lg8979_flags;
140 static int ett_lg8979_funccode;
141 static int ett_lg8979_point;
142 static int ett_lg8979_ts;
143
144 /* Globals for L&G 8979 Protocol Preferences */
145 static bool lg8979_desegment = true;
146
147 #define LG8979_HEADER 0xFF
148
149 #define LG8979_DIR_INDETERMINATE 0
150 #define LG8979_DIR_MASTER_TO_RTU 1
151 #define LG8979_DIR_RTU_TO_MASTER 2
152
153 /* Function Codes */
154 #define LG8979_FC_ANG_CHGRPT 0
155 #define LG8979_FC_ANG_FRCRPT 1
156 #define LG8979_FC_ANGGRP_CHGRPT 2
157 #define LG8979_FC_ANGGRP_FRCRPT 3
158 #define LG8979_FC_ADC_FRCRPT 5
159 #define LG8979_FC_IND_CHGRPT 6
160 #define LG8979_FC_IND_FRCRPT 7
161 #define LG8979_FC_SOE_CHGRPT 8
162 #define LG8979_FC_SOE_FRCRPT 9
163 #define LG8979_FC_DIG_FRCRPT 11
164 #define LG8979_FC_ACC_CHGRPT 12
165 #define LG8979_FC_ACC_FRCRPT 13
166 #define LG8979_FC_SOELOG_CHGRPT 14
167 #define LG8979_FC_ANG_OUTPUT 20
168 #define LG8979_FC_SBO_SELECT 21
169 #define LG8979_FC_SBO_OPERATE 22
170 #define LG8979_FC_DIG_OUTPUT 23
171 #define LG8979_FC_ACC_FREEZE 24
172 #define LG8979_FC_PUL_OUTPUT 25
173 #define LG8979_FC_PULTR_OUTPUT 26
174 #define LG8979_FC_SBO_IMEXECUTE 28
175 #define LG8979_FC_RTU_RESTART 30
176 #define LG8979_FC_RTU_CONFIG 31
177 #define LG8979_FC_TIME_SYNC 32
178 #define LG8979_FC_TIME_BIAS 33
179 #define LG8979_FC_ANG_DEADBAND 34
180 #define LG8979_FC_ANGGRP_DEFINE 35
181 #define LG8979_FC_ACC_PRESET 36
182 #define LG8979_FC_CONT_REQUEST 37
183 #define LG8979_FC_REPEAT_MSG 38
184 #define LG8979_FC_FIRMWARE_CFG 39
185 #define LG8979_FC_TABLE_READ 47
186 #define LG8979_FC_TABLE_WRITE 48
187 #define LG8979_FC_SPRPT_INT 50
188 #define LG8979_FC_SPRPT_SEQNUM 51
189 #define LG8979_FC_EXP_RPT 63
190
191 static const value_string lg8979_funccode_vals[] = {
192 { LG8979_FC_ANG_CHGRPT, "Analog Change Report" },
193 { LG8979_FC_ANG_FRCRPT, "Analog Force Report" },
194 { LG8979_FC_ANGGRP_CHGRPT, "Analog Group Change Report" },
195 { LG8979_FC_ANGGRP_FRCRPT, "Analog Group Force Report" },
196 { 4, "Unknown/Invalid Function" },
197 { LG8979_FC_ADC_FRCRPT, "ADC Reference Force Report" },
198 { LG8979_FC_IND_CHGRPT, "Indication Change Report" },
199 { LG8979_FC_IND_FRCRPT, "Indication Force Report" },
200 { LG8979_FC_SOE_CHGRPT, "SOE Change Report" },
201 { LG8979_FC_SOE_FRCRPT, "SOE Force Report" },
202 { 10, "Unknown/Invalid Function" },
203 { LG8979_FC_DIG_FRCRPT, "Digital Input Force Report" },
204 { LG8979_FC_ACC_CHGRPT, "Accumulator Change Report" },
205 { LG8979_FC_ACC_FRCRPT, "Accumulator Force Report" },
206 { LG8979_FC_SOELOG_CHGRPT, "SOE Log Change Report" },
207 { 15, "Unknown/Invalid Function" },
208 { 16, "Unknown/Invalid Function" },
209 { 17, "Unknown/Invalid Function" },
210 { 18, "Unknown/Invalid Function" },
211 { 19, "Unknown/Invalid Function" },
212 { LG8979_FC_ANG_OUTPUT, "Analog Output" },
213 { LG8979_FC_SBO_SELECT, "SBO Select" },
214 { LG8979_FC_SBO_OPERATE, "SBO Operate" },
215 { LG8979_FC_DIG_OUTPUT, "Digital Output" },
216 { LG8979_FC_ACC_FREEZE, "Accumulator Freeze" },
217 { LG8979_FC_PUL_OUTPUT, "Pulse Output" },
218 { LG8979_FC_PULTR_OUTPUT, "Pulse Train Output" },
219 { 27, "Unknown/Invalid Function" },
220 { LG8979_FC_SBO_IMEXECUTE, "SBO Immediate Execute" },
221 { 29, "Unknown/Invalid Function" },
222 { LG8979_FC_RTU_RESTART, "Restart RTU" },
223 { LG8979_FC_RTU_CONFIG, "RTU Configuration" },
224 { LG8979_FC_TIME_SYNC, "Time Synchronization" },
225 { LG8979_FC_TIME_BIAS, "Time Bias" },
226 { LG8979_FC_ANG_DEADBAND, "Analog Deadbands" },
227 { LG8979_FC_ANGGRP_DEFINE, "Analog Group Define" },
228 { LG8979_FC_ACC_PRESET, "Accumulator Preset" },
229 { LG8979_FC_CONT_REQUEST, "Continuation Request" },
230 { LG8979_FC_REPEAT_MSG, "Repeat Last Message" },
231 { LG8979_FC_FIRMWARE_CFG, "Firmware Configuration" },
232 { 40, "Unknown/Invalid Function" },
233 { 41, "Unknown/Invalid Function" },
234 { 42, "Unknown/Invalid Function" },
235 { 43, "Unknown/Invalid Function" },
236 { 44, "Unknown/Invalid Function" },
237 { 45, "Unknown/Invalid Function" },
238 { 46, "Unknown/Invalid Function" },
239 { LG8979_FC_TABLE_READ, "Table Read" },
240 { LG8979_FC_TABLE_WRITE, "Table Write" },
241 { 49, "Unknown/Invalid Function" },
242 { LG8979_FC_SPRPT_INT, "Spontaneous Report Interval" },
243 { LG8979_FC_SPRPT_SEQNUM, "Spontaneous Report Sequence Number" },
244 { 52, "Unknown/Invalid Function" },
245 { 53, "Unknown/Invalid Function" },
246 { 54, "Unknown/Invalid Function" },
247 { 55, "Unknown/Invalid Function" },
248 { 56, "Unknown/Invalid Function" },
249 { 57, "Unknown/Invalid Function" },
250 { 58, "Unknown/Invalid Function" },
251 { 59, "Unknown/Invalid Function" },
252 { 60, "Unknown/Invalid Function" },
253 { 61, "Unknown/Invalid Function" },
254 { 62, "Unknown/Invalid Function" },
255 { LG8979_FC_EXP_RPT, "Exception Report" },
256 { 0, NULL }
257 };
258 static value_string_ext lg8979_funccode_vals_ext = VALUE_STRING_EXT_INIT(lg8979_funccode_vals);
259
260 static const value_string lg8979_cardcode_vals[] = {
261 { 0, "Non-Existent Slot" },
262 { 1, "Analog Input" },
263 { 2, "A/D Converter" },
264 { 3, "Analog Output" },
265 { 4, "Indication Input" },
266 { 5, "24-Bit Digital Output" },
267 { 7, "SBO Control Output" },
268 { 8, "Accumulator, Form A" },
269 { 11, "32-Bit Digital Output" },
270 { 12, "Accumulator, Form C" },
271 { 15, "Pulse Output" },
272 { 28, "SOE Input" },
273 { 29, "KWH Input" },
274 { 30, "Serial Data Collector" },
275 { 31, "Empty Slot" },
276 { 0, NULL }
277 };
278
279 static const value_string lg8979_exprpt_code_vals[] = {
280 { 0x00, "Warm Restart" },
281 { 0x01, "Cold Start" },
282 { 0x02, "Insufficient Ram" },
283 { 0x03, "Bus Failure" },
284 { 0x04, "SBO Failure" },
285 { 0x05, "Analog Failure" },
286 { 0x06, "Indication/SOE Failure" },
287 { 0x07, "Card Placement Error" },
288 { 0x08, "Not Used" },
289 { 0x09, "Invalid Function Code" },
290 { 0x0A, "Invalid Block Length" },
291 { 0x0B, "Non-Existent Point" },
292 { 0x0C, "Invalid Parameter" },
293 { 0x0D, "Select/Execute Mismatch" },
294 { 0x0E, "Function Not Allowed" },
295 { 0x0F, "Not Used" },
296 { 0x10, "Database Setup has Changed" },
297 { 0x11, "Indication Change Sequence" },
298 { 0, NULL }
299 };
300
301 static const value_string lg8979_exprpt_parm_vals[] = {
302 { 0x00, "N/A" },
303 { 0x01, "1=Requested CLDSTRT" },
304 { 0x02, "N/A" },
305 { 0x03, "Unit" },
306 { 0x04, "Unit/Slot" },
307 { 0x05, "Unit/Slot" },
308 { 0x06, "Unit/Slot" },
309 { 0x07, "Unit/Slot" },
310 { 0x08, "N/A" },
311 { 0x09, "Function Code" },
312 { 0x0A, "Block Length" },
313 { 0x0B, "Point" },
314 { 0x0C, "Parameter" },
315 { 0x0D, "Execute Point" },
316 { 0x0E, "Function Code" },
317 { 0x0F, "N/A" },
318 { 0x10, "N/A" },
319 { 0x11, "1=Time Order (0=Not T/O)" },
320 { 0, NULL }
321 };
322
323 static const value_string lg8979_sbo_tripclose_vals[] = {
324 { 0x00, "Trip" },
325 { 0x01, "Close" },
326 { 0, NULL }
327 };
328
329 static const value_string lg8979_pul_output_base_vals[] = {
330 { 0x00, "10 msec" },
331 { 0x01, "100 msec" },
332 { 0x02, "1 sec" },
333 { 0x03, "10 sec" },
334 { 0, NULL }
335 };
336
337 static const value_string lg8979_pul_output_rl_vals[] = {
338 { 0x00, "Lower" },
339 { 0x01, "Raise" },
340 { 0, NULL }
341 };
342
343 /*************************************************************/
344 /* Try to determine "direction" of message. */
345 /* Check the data length within the packet and compare */
346 /* vs. the function code. Master->RTU messages will have a */
347 /* fixed length that can be used to determine the direction */
348 /* of the message */
349 /*************************************************************/
350 static int
351 classify_lg8979_packet(tvbuff_t *tvb)
352 {
353 uint8_t func, len, data_len, flags;
354
355 len = tvb_reported_length(tvb);
356 /* If TVB length is equal to 5, this is classified as a 'short response message' */
357 /* and is guaranteed to be RTU->Master only */
358 if (len == 5) {
359 return LG8979_DIR_RTU_TO_MASTER;
360 }
361
362 /* If TVB length is greater than 5, let's dig deeper */
363 if (len > 5) {
364
365 flags = tvb_get_uint8(tvb, 1);
366
367 /* Flags vary between message types, so let's try those first to determine the message direction */
368 /* If both bit 3 and bit 4 are set, this is almost certainly a RTU->Master message */
369 if ( (flags & 0x04) && (flags & 0x08) ){
370 return LG8979_DIR_RTU_TO_MASTER;
371 }
372 /* If anything is in bits 3-6 without bit 7, this is a RTU->Master message */
373 else if ( (flags & 0x78) && !(flags & 0x80) ){
374 return LG8979_DIR_RTU_TO_MASTER;
375 }
376
377 func = tvb_get_uint8(tvb, 3) & 0x7F;
378 data_len = tvb_get_uint8(tvb, 4);
379
380 /* If we have more data in the tvb then should be there, this is a stacked RTU->Master response */
381 if (len > (data_len + 5 + 2)) {
382 return LG8979_DIR_RTU_TO_MASTER;
383 }
384
385 switch (func) {
386 case LG8979_FC_ANG_CHGRPT:
387 case LG8979_FC_ADC_FRCRPT:
388 case LG8979_FC_IND_CHGRPT:
389 case LG8979_FC_SOE_CHGRPT:
390 case LG8979_FC_ACC_CHGRPT:
391 case LG8979_FC_SOELOG_CHGRPT:
392 case LG8979_FC_REPEAT_MSG:
393 case LG8979_FC_RTU_CONFIG:
394 case LG8979_FC_FIRMWARE_CFG:
395 if (data_len == 0) {
396 return LG8979_DIR_MASTER_TO_RTU;
397 }
398 else {
399 return LG8979_DIR_RTU_TO_MASTER;
400 }
401 break;
402
403 case LG8979_FC_ANGGRP_CHGRPT:
404 case LG8979_FC_ANGGRP_FRCRPT:
405 if (data_len == 1) {
406 return LG8979_DIR_MASTER_TO_RTU;
407 }
408 else {
409 return LG8979_DIR_RTU_TO_MASTER;
410 }
411 break;
412
413
414 case LG8979_FC_DIG_FRCRPT:
415 case LG8979_FC_ACC_FRCRPT:
416 case LG8979_FC_TIME_BIAS:
417 if (data_len == 2) {
418 return LG8979_DIR_MASTER_TO_RTU;
419 }
420 else {
421 return LG8979_DIR_RTU_TO_MASTER;
422 }
423 break;
424
425 case LG8979_FC_ANG_FRCRPT:
426 case LG8979_FC_IND_FRCRPT:
427 case LG8979_FC_SOE_FRCRPT:
428 if (data_len == 4) {
429 return LG8979_DIR_MASTER_TO_RTU;
430 }
431 else {
432 return LG8979_DIR_RTU_TO_MASTER;
433 }
434 break;
435
436 /* These are either totally or mostly master->RTU operations */
437 case LG8979_FC_ANG_OUTPUT:
438 case LG8979_FC_SBO_SELECT:
439 case LG8979_FC_SBO_OPERATE:
440 case LG8979_FC_DIG_OUTPUT:
441 case LG8979_FC_ACC_FREEZE:
442 case LG8979_FC_PUL_OUTPUT:
443 case LG8979_FC_PULTR_OUTPUT:
444 case LG8979_FC_SBO_IMEXECUTE:
445 case LG8979_FC_TIME_SYNC:
446 case LG8979_FC_ANG_DEADBAND:
447 case LG8979_FC_ANGGRP_DEFINE:
448 case LG8979_FC_ACC_PRESET:
449 case LG8979_FC_CONT_REQUEST:
450
451 return LG8979_DIR_MASTER_TO_RTU;
452
453 case LG8979_FC_EXP_RPT:
454 return LG8979_DIR_RTU_TO_MASTER;
455
456 default:
457 return LG8979_DIR_INDETERMINATE;
458 }
459 }
460
461 /* else, cannot classify */
462 return LG8979_DIR_INDETERMINATE;
463 }
464
465 /******************************************************************************************************/
466 /* Code to dissect L&G 8979 Protocol packets */
467 /******************************************************************************************************/
468 static int
469 dissect_lg8979(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
470 {
471 /* Set up structures needed to add the protocol subtree and manage it */
472 proto_item *lg8979_item, *lg8979_point_item = NULL;
473 proto_item *lg8979_slot_item = NULL, *lg8979_ang_group_pts_item = NULL;
474 proto_tree *lg8979_tree, *lg8979_fc_tree = NULL;
475 proto_tree *lg8979_point_tree = NULL, *lg8979_ts_tree = NULL;
476 int offset = 0;
477 uint8_t rtu_addr, func, packet_type, data_len, ptnum8, tripclose, rl, exp_code, num_chassis;
478 uint8_t ts_mon, ts_day, ts_hr, ts_min, ts_sec;
479 uint16_t ptnum, ptval, ana12_val;
480 uint16_t ts_ms;
481 int num_points = 0, cnt = 0, cnt1 = 0;
482 bool shr, new_status, change;
483
484 /* Make entries in Protocol column on summary display */
485 col_set_str(pinfo->cinfo, COL_PROTOCOL, "L&G 8979");
486 col_clear(pinfo->cinfo, COL_INFO);
487
488 lg8979_item = proto_tree_add_item(tree, proto_lg8979, tvb, 0, -1, ENC_NA);
489 lg8979_tree = proto_item_add_subtree(lg8979_item, ett_lg8979);
490
491 /* Add 0xFF Header to Protocol Tree */
492 proto_tree_add_item(lg8979_tree, hf_lg8979_header, tvb, offset, 1, ENC_LITTLE_ENDIAN);
493 offset += 1;
494
495 /* "Request" or "Response" */
496 packet_type = classify_lg8979_packet(tvb);
497
498 /* This packet type is classified as a "Request" and is deemed in the direction of "master -> RTU" */
499 if (packet_type == LG8979_DIR_MASTER_TO_RTU) {
500 static int * const request_flags[] = {
501 &hf_lg8979_shr,
502 &hf_lg8979_mfc,
503 &hf_lg8979_ack,
504 NULL
505 };
506
507 col_set_str(pinfo->cinfo, COL_INFO, "Master -> RTU");
508
509 /* Add Flags to Protocol Tree */
510 shr = tvb_get_uint8(tvb, offset) & 0x80;
511
512 proto_tree_add_bitmask(lg8979_tree, tvb, offset, hf_lg8979_flags, ett_lg8979_flags, request_flags, ENC_LITTLE_ENDIAN);
513 offset += 1;
514
515 /* Add RTU Address to Protocol Tree */
516 rtu_addr = tvb_get_uint8(tvb, offset);
517 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Address: %d", rtu_addr);
518
519 proto_tree_add_item(lg8979_tree, hf_lg8979_address, tvb, offset, 1, ENC_LITTLE_ENDIAN);
520 offset += 1;
521
522 if (!shr) {
523 /* Add Function Code & last Mark Block to Protocol Tree */
524 /* Function code is 7 lower bits of byte , LMB is 8th bit*/
525 func = tvb_get_uint8(tvb, offset) & 0x7f;
526
527 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL,
528 val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"));
529
530 lg8979_fc_tree = proto_tree_add_subtree_format(
531 lg8979_tree, tvb, offset, 1, ett_lg8979_funccode, NULL,
532 "Function Code: %s (%d)",
533 val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"), func);
534
535 proto_tree_add_item(lg8979_fc_tree, hf_lg8979_lastblock, tvb, offset, 1, ENC_LITTLE_ENDIAN);
536 proto_tree_add_item(lg8979_fc_tree, hf_lg8979_funccode, tvb, offset, 1, ENC_LITTLE_ENDIAN);
537 offset += 1;
538
539 data_len = tvb_get_uint8(tvb, offset);
540 proto_tree_add_item(lg8979_tree, hf_lg8979_length, tvb, offset, 1, ENC_LITTLE_ENDIAN);
541 offset += 1;
542
543 switch (func) {
544 /* Function Code 0 Analog Change Report */
545 /* Function Code 7 Indication Force Report */
546 /* Function Code 9 SOE Force Report */
547 case LG8979_FC_ANG_FRCRPT:
548 case LG8979_FC_IND_FRCRPT:
549 case LG8979_FC_SOE_FRCRPT:
550 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
551 proto_tree_add_item(lg8979_tree, hf_lg8979_stop_ptnum16, tvb, offset+2, 2, ENC_LITTLE_ENDIAN);
552 offset += 4;
553 break;
554
555 /* Function Code 2 Analog Group Change Report */
556 case LG8979_FC_ANGGRP_CHGRPT:
557 proto_tree_add_item(lg8979_tree, hf_lg8979_ang_group, tvb, offset, 1, ENC_LITTLE_ENDIAN);
558 offset += 1;
559 break;
560
561 /* Function Code 11 Digital Input Force Report */
562 /* Function Code 13 Accumulator Force Report */
563 case LG8979_FC_DIG_FRCRPT:
564 case LG8979_FC_ACC_FRCRPT:
565 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
566 proto_tree_add_item(lg8979_tree, hf_lg8979_stop_ptnum8, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
567 offset += 2;
568 break;
569
570 /* Function Code 20 Analog Output */
571 case LG8979_FC_ANG_OUTPUT:
572 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
573 proto_tree_add_item(lg8979_tree, hf_lg8979_ang_output_val, tvb, offset+1, 2, ENC_LITTLE_ENDIAN);
574 offset += 3;
575 break;
576
577 /* Function Code 21 SBO Select */
578 case LG8979_FC_SBO_SELECT:
579
580 /* Get 8-bit point number and trip/close command-code */
581 ptnum = tvb_get_uint8(tvb, offset);
582 tripclose = (tvb_get_uint8(tvb, offset+1) & 0x80) >> 7;
583
584 lg8979_point_tree = proto_tree_add_subtree_format(
585 lg8979_tree, tvb, offset, 2,
586 ett_lg8979_point, NULL,
587 "SBO Command, Pt.Num: %u, Code: %s",
588 ptnum,
589 val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
590
591 /* Update the Information Column with Command Details */
592 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u, Code: %s",
593 ptnum, val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
594
595 /* Add SBO Select Details to tree */
596 proto_tree_add_item(lg8979_point_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
597 proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_tripclose, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
598 proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_timercnt, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
599 offset += 2;
600 break;
601
602 /* Function Code 22 SBO Operate */
603 case LG8979_FC_SBO_OPERATE:
604
605 /* Get 8-bit point number */
606 ptnum = tvb_get_uint8(tvb, offset);
607
608 /* Update the Information Column with Command Details */
609 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u", ptnum);
610
611 /* Add 8-bit point number to tree */
612 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
613 offset += 1;
614 break;
615
616 /* Function Code 23 Digital Output */
617 case LG8979_FC_DIG_OUTPUT:
618
619 /* Add Digital Output Details to tree */
620 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
621 proto_tree_add_item(lg8979_tree, hf_lg8979_digout_data, tvb, offset+1, 3, ENC_LITTLE_ENDIAN);
622 offset += 4;
623 break;
624
625 /* Function Code 25 Pulse Output */
626 case LG8979_FC_PUL_OUTPUT:
627
628 ptnum = tvb_get_uint8(tvb, offset);
629 rl = (tvb_get_uint8(tvb, offset+1) & 0x80) >> 7;
630
631 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2,
632 ett_lg8979_point, NULL, "Pulse Output, Pt.Num: %u, Code: %s",
633 ptnum, val_to_str_const(rl, lg8979_pul_output_rl_vals, "Unknown Control Code"));
634
635 /* Add Pulse Output Details to tree */
636 proto_tree_add_item(lg8979_point_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
637 proto_tree_add_item(lg8979_point_tree, hf_lg8979_pul_output_base, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
638 proto_tree_add_item(lg8979_point_tree, hf_lg8979_pul_output_dur, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
639 proto_tree_add_item(lg8979_point_tree, hf_lg8979_pul_output_rl, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
640 offset += 2;
641 break;
642
643 /* Function Code 32 Time Synchronization */
644 case LG8979_FC_TIME_SYNC:
645
646 /* Add 7-byte time-sync value to tree */
647 ts_mon = tvb_get_uint8(tvb, offset);
648 ts_day = tvb_get_uint8(tvb, offset+1);
649 ts_hr = tvb_get_uint8(tvb, offset+2);
650 ts_min = tvb_get_uint8(tvb, offset+3);
651 ts_sec = tvb_get_uint8(tvb, offset+4);
652 ts_ms = tvb_get_letohs(tvb, offset+5);
653
654 lg8979_ts_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 7, ett_lg8979_ts, NULL,
655 "Time-Sync Value: %02d/%02d %02d:%02d:%02d.%03d",
656 ts_mon, ts_day, ts_hr, ts_min, ts_sec, ts_ms);
657
658 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_mon, tvb, offset, 1, ENC_LITTLE_ENDIAN);
659 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_day, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
660 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_hour, tvb, offset+2, 1, ENC_LITTLE_ENDIAN);
661 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_min, tvb, offset+3, 1, ENC_LITTLE_ENDIAN);
662 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_sec, tvb, offset+4, 1, ENC_LITTLE_ENDIAN);
663 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_msec, tvb, offset+5, 2, ENC_LITTLE_ENDIAN);
664 offset += 7;
665 break;
666
667 /* Function Code 33 Time Bias */
668 case LG8979_FC_TIME_BIAS:
669 proto_tree_add_item(lg8979_tree, hf_lg8979_timebias_value, tvb, offset, 2, ENC_LITTLE_ENDIAN);
670 offset += 2;
671 break;
672
673 /* Function Code 34 Analog Deadband Write */
674 case LG8979_FC_ANG_DEADBAND:
675
676 /* Get analog point number base and add to tree */
677 ptnum = tvb_get_letohs(tvb, offset);
678 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
679 offset += 2;
680
681 num_points = (data_len-2);
682
683 for (cnt=0; cnt<num_points; cnt++) {
684
685 ptval = tvb_get_uint8(tvb, offset);
686 proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_deadband, tvb, offset, 1,
687 ptnum, "Point Number %u: New Deadband: %u", ptnum, ptval);
688 ptnum += 1;
689 offset += 1;
690 }
691
692 break;
693
694 /* Function Code 35 Analog Group Define */
695 case LG8979_FC_ANGGRP_DEFINE:
696
697 proto_tree_add_item(lg8979_tree, hf_lg8979_ang_group, tvb, offset, 1, ENC_LITTLE_ENDIAN);
698 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset+1, 2, ENC_LITTLE_ENDIAN);
699 offset += 3;
700
701 num_points = (data_len-3);
702
703 for (cnt=0; cnt<num_points; cnt++) {
704 lg8979_ang_group_pts_item = proto_tree_add_item(lg8979_tree, hf_lg8979_ang_group_pts, tvb, offset, 1, ENC_LITTLE_ENDIAN);
705 proto_item_append_text(lg8979_ang_group_pts_item, " (%d - %d), ", (cnt*8), ((cnt*8)+7));
706 offset += 1;
707 }
708
709 break;
710
711 /* Function Code 36 Accumulator Preset */
712 case LG8979_FC_ACC_PRESET:
713
714 /* Each qty to follow has a 8-bit point number followed by a 16-bit value */
715 num_points = ((data_len)/3);
716
717 for (cnt=0; cnt<num_points; cnt++) {
718
719 ptnum8 = tvb_get_uint8(tvb, offset);
720 ptval = tvb_get_letohs(tvb, offset+1);
721 proto_tree_add_uint_format(lg8979_tree, hf_lg8979_acc_preset, tvb, offset, 3,
722 ptnum8, "Acc Point Number %u: Preset: %u", ptnum8, ptval);
723 offset += 3;
724 }
725
726 break;
727
728 default:
729 break;
730 } /* func */
731
732 } /* !shr */
733
734 /* Add CRC-16 */
735 proto_tree_add_item(lg8979_tree, hf_lg8979_crc16, tvb, offset, 2, ENC_BIG_ENDIAN);
736
737 }
738 /* This packet type is classified as a "Response" and is deemed in the direction of "RTU -> master" */
739 else if (packet_type == LG8979_DIR_RTU_TO_MASTER) {
740
741 static int * const response_flags[] = {
742 &hf_lg8979_shr,
743 &hf_lg8979_con,
744 &hf_lg8979_frz,
745 &hf_lg8979_ind,
746 &hf_lg8979_sch,
747 &hf_lg8979_slg,
748 NULL
749 };
750
751 col_set_str(pinfo->cinfo, COL_INFO, "RTU -> Master");
752
753 /* Retrieve and add Flags to Protocol Tree */
754 shr = tvb_get_uint8(tvb, offset) & 0x80;
755
756 proto_tree_add_bitmask(lg8979_tree, tvb, offset, hf_lg8979_flags, ett_lg8979_flags, response_flags, ENC_LITTLE_ENDIAN);
757 offset += 1;
758
759 /* Add RTU Address to Protocol Tree */
760 rtu_addr = tvb_get_uint8(tvb, offset);
761 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Address: %d", rtu_addr);
762
763 proto_tree_add_item(lg8979_tree, hf_lg8979_address, tvb, offset, 1, ENC_BIG_ENDIAN);
764 offset += 1;
765
766 /* If this is not a short response, and there are at least 2 bytes remaining continue to process function codes */
767 while ((!shr) && (tvb_reported_length_remaining(tvb, offset) > 2)){
768
769 /* Add Function Code & last Mark Block to Protocol Tree */
770 /* Function code is 7 lower bits of byte , LMB is 8th bit*/
771 func = tvb_get_uint8(tvb, offset) & 0x7f;
772 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL,
773 val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"));
774
775 lg8979_fc_tree = proto_tree_add_subtree_format(
776 lg8979_tree, tvb, offset, 1, ett_lg8979_funccode, NULL,
777 "Function Code: %s (%d)", val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"), func);
778
779 proto_tree_add_item(lg8979_fc_tree, hf_lg8979_lastblock, tvb, offset, 1, ENC_BIG_ENDIAN);
780 proto_tree_add_item(lg8979_fc_tree, hf_lg8979_funccode, tvb, offset, 1, ENC_BIG_ENDIAN);
781 offset += 1;
782
783 data_len = tvb_get_uint8(tvb, offset);
784 proto_tree_add_item(lg8979_tree, hf_lg8979_length, tvb, offset, 1, ENC_BIG_ENDIAN);
785 offset += 1;
786
787 switch (func) {
788 /* Function Code 0 Analog Change Report */
789 /* Function Code 2 Analog Group Change Report */
790 case LG8979_FC_ANG_CHGRPT:
791 case LG8979_FC_ANGGRP_CHGRPT:
792
793 num_points = (data_len / 3);
794
795 for (cnt=0; cnt<num_points; cnt++) {
796
797 ptnum = ( tvb_get_uint8(tvb, offset) | ((tvb_get_uint8(tvb, offset+1) & 0x0F) << 8) );
798 ptval = ( ((tvb_get_uint8(tvb, offset+1) & 0xF0) >> 4) | (tvb_get_uint8(tvb, offset+2) << 4) );
799 proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_point, tvb, offset, 3, ptnum,
800 "Point Number %u: %u", ptnum, ptval);
801 offset += 3;
802 }
803 break;
804
805 /* Function Code 1 Analog Force Report */
806 case LG8979_FC_ANG_FRCRPT:
807
808 ptnum = tvb_get_letohs(tvb, offset);
809 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
810 offset += 2;
811
812 /* Decode 12-bit analog data following this 3-byte bit pattern.
813 * Byte 1: PtVal 'N' LSB
814 * Byte 2: PtVal 'N+1' LSB : PtVal 'N' MSB
815 * Byte 3: PtVal 'N+1' MSB
816 * To determine the number of points based on the data bytes, we need to know
817 * if we have an even or odd number of data bytes.
818 */
819
820 /* even number of data bytes */
821 if (((data_len-2) % 3) == 0) {
822 num_points = (((data_len-2) / 3) * 2);
823 }
824 /* odd number of data bytes */
825 else {
826 num_points = ((((data_len-2) / 3) * 2) + 1);
827 }
828
829 /* loop through the data bytes decoding 12-bit analogs.
830 When on an even count, offset by 1 and on an odd, offset by 2. */
831 for (cnt=0; cnt < num_points; cnt++) {
832 if (cnt%2 == 0) {
833
834 ana12_val = ( tvb_get_uint8(tvb, offset) | ((tvb_get_uint8(tvb, offset+1) & 0x0F) << 8) );
835 proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_point, tvb, offset, 2, ptnum,
836 "Point Number %u: %u", ptnum, ana12_val);
837 offset += 1;
838
839 /* If we are in the last run through the for loop, increment the offset by 1 more byte than normal */
840 if (cnt == (num_points - 1)) {
841 offset += 1;
842 }
843 }
844 else {
845
846 ana12_val = ( ((tvb_get_uint8(tvb, offset) & 0xF0) >> 4) | (tvb_get_uint8(tvb, offset+1) << 4) );
847 proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_point, tvb, offset, 2, ptnum,
848 "Point Number %u: %u", ptnum, ana12_val);
849 offset += 2;
850 }
851 ptnum += 1;
852 }
853
854 break;
855
856 /* Function Code 5 ADC Reference Force Report */
857 /* Same byte pattern as 3 sequential analogs in a Force Report would follow */
858 case LG8979_FC_ADC_FRCRPT:
859
860 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
861 offset += 2;
862
863 /* Retrieve the 0 and -90% references */
864 ana12_val = ( tvb_get_uint8(tvb, offset) | ((tvb_get_uint8(tvb, offset+1) & 0x0F) << 8) );
865 proto_tree_add_uint(lg8979_tree, hf_lg8979_adc_ref_zero, tvb, offset, 2, ana12_val);
866
867 ana12_val = ( ((tvb_get_uint8(tvb, offset+1) & 0xF0) >> 4) | (tvb_get_uint8(tvb, offset+2) << 4) );
868 proto_tree_add_uint(lg8979_tree, hf_lg8979_adc_ref_neg90, tvb, offset+1, 2, ana12_val);
869
870 offset += 3;
871
872 /* Retrieve the +90% reference */
873 ana12_val = ( tvb_get_uint8(tvb, offset) | ((tvb_get_uint8(tvb, offset+1) & 0x0F) << 8) );
874 proto_tree_add_uint(lg8979_tree, hf_lg8979_adc_ref_pos90, tvb, offset, 2, ana12_val);
875 offset += 2;
876
877 break;
878
879 /* Function Code 6 Indication Change Report */
880 case LG8979_FC_IND_CHGRPT:
881
882 num_points = (data_len / 2);
883
884 for (cnt=0; cnt<num_points; cnt++) {
885 /* Get 12-bit point number and new status / change bits */
886 ptnum = tvb_get_letohs(tvb, offset) & 0xFFF;
887 new_status = (tvb_get_uint8(tvb, offset+1) & 0x80) >> 7;
888 change = (tvb_get_uint8(tvb, offset+1) & 0x40) >> 6;
889
890 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2, ett_lg8979_point, NULL,
891 "Indication Change Report, Point Number: %u, Status: %u, Change %u", ptnum, new_status, change);
892
893 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_chgrpt_ptnum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
894 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_chgrpt_status, tvb, offset, 2, ENC_LITTLE_ENDIAN);
895 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_chgrpt_change, tvb, offset, 2, ENC_LITTLE_ENDIAN);
896
897 offset += 2;
898 }
899
900 break;
901
902 /* Function Code 7 Indication Force Report */
903 case LG8979_FC_IND_FRCRPT:
904
905 ptnum = tvb_get_letohs(tvb, offset);
906 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
907 offset += 2;
908
909 num_points = ((data_len - 2) / 2);
910
911 for (cnt=0; cnt<num_points; cnt++) {
912 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
913 ett_lg8979_point, NULL, "Indication Status, Base Point Num %d", ptnum);
914
915 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
916 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
917 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
918 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
919 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
920 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
921 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
922 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
923 offset += 1;
924
925 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
926 ett_lg8979_point, NULL, "Indication Change, Base Point Num %d", ptnum);
927
928 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
929 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
930 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
931 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
932 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
933 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
934 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
935 proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
936 offset += 1;
937
938 ptnum += 8;
939 }
940
941 break;
942
943 /* Function Code 8 SOE Change Report */
944 case LG8979_FC_SOE_CHGRPT:
945
946 num_points = (data_len / 2);
947
948 for (cnt=0; cnt<num_points; cnt++) {
949 /* Get 12-bit point number and new status / change bits */
950 ptnum = tvb_get_letohs(tvb, offset) & 0xFFF;
951 new_status = (tvb_get_uint8(tvb, offset+1) & 0x80) >> 7;
952 change = (tvb_get_uint8(tvb, offset+1) & 0x40) >> 6;
953
954 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2, ett_lg8979_point, NULL,
955 "SOE Change Report, Point Number: %u, Status: %u, Change %u", ptnum, new_status, change);
956
957 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_chgrpt_ptnum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
958 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_chgrpt_status, tvb, offset, 2, ENC_LITTLE_ENDIAN);
959 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_chgrpt_change, tvb, offset, 2, ENC_LITTLE_ENDIAN);
960
961 offset += 2;
962 }
963
964 break;
965
966 /* Function Code 9 SOE Force Report */
967 case LG8979_FC_SOE_FRCRPT:
968
969 ptnum = tvb_get_letohs(tvb, offset);
970 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
971 offset += 2;
972
973 num_points = ((data_len - 2) / 2);
974
975 for (cnt=0; cnt<num_points; cnt++) {
976 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
977 ett_lg8979_point, NULL, "SOE Status, Base Point Num %d", ptnum);
978
979 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
980 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
981 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
982 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
983 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
984 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
985 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
986 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
987 offset += 1;
988
989 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
990 ett_lg8979_point, NULL, "SOE Change, Base Point Num %d", ptnum);
991
992 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
993 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
994 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
995 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
996 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
997 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
998 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
999 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1000 offset += 1;
1001
1002 ptnum += 8;
1003 }
1004
1005 break;
1006
1007 /* Function Code 11 Digital Input Force Report */
1008 case LG8979_FC_DIG_FRCRPT:
1009
1010 ptnum8 = tvb_get_uint8(tvb, offset);
1011 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1012 offset += 1;
1013
1014 /* 1 byte per start block and 2 bytes per 16-bit block to follow */
1015 num_points = ((data_len-1)/2);
1016
1017 for (cnt=0; cnt<num_points; cnt++) {
1018
1019 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2,
1020 ett_lg8979_point, NULL, "Digital Input Block %d", ptnum8);
1021
1022 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b0, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1023 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b1, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1024 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b2, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1025 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b3, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1026 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b4, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1027 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b5, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1028 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b6, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1029 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b7, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1030 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b8, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1031 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b9, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1032 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b10, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1033 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b11, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1034 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b12, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1035 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b13, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1036 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b14, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1037 proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b15, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1038
1039 ptnum8 += 1;
1040 offset += 2;
1041 }
1042
1043 break;
1044
1045
1046 /* Function Code 12 Accumulator Change Report */
1047 /* Function Code 13 Accumulator Force Report */
1048 case LG8979_FC_ACC_CHGRPT:
1049 case LG8979_FC_ACC_FRCRPT:
1050
1051 ptnum8 = tvb_get_uint8(tvb, offset);
1052 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1053 offset += 1;
1054
1055 /* 1 byte for start point number and 2 bytes for each 16-bit accumulator value */
1056 num_points = ((data_len-1) / 2);
1057
1058 for (cnt=0; cnt<num_points; cnt++) {
1059
1060 lg8979_point_item = proto_tree_add_item(lg8979_tree, hf_lg8979_acc_point, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1061 proto_item_prepend_text(lg8979_point_item, "Point Number %u, ", ptnum8);
1062
1063 offset += 2;
1064 ptnum8 += 1;
1065
1066 }
1067
1068 break;
1069
1070 /* Function Code 14 SOE Log Change Report */
1071 case LG8979_FC_SOELOG_CHGRPT:
1072
1073 /* 9 bytes for each SOE Record */
1074 num_points = (data_len / 9);
1075
1076 for (cnt=0; cnt<num_points; cnt++) {
1077
1078 /* Get 12-bit point number and new status bit */
1079 ptnum = tvb_get_letohs(tvb, offset) & 0xFFF;
1080 new_status = (tvb_get_uint8(tvb, offset+1) & 0x80) >> 7;
1081
1082 lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 9, ett_lg8979_point, NULL,
1083 "SOE Log Change Report, Point Number: %u, New Status: %u", ptnum, new_status);
1084
1085 /* Add 12-bit point number and "new status" bit to tree */
1086 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_logchg_ptnum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1087 proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_logchg_newstat, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1088 offset += 2;
1089
1090 /* Add 7-byte time-stamp to tree */
1091 ts_mon = tvb_get_uint8(tvb, offset);
1092 ts_day = tvb_get_uint8(tvb, offset+1);
1093 ts_hr = tvb_get_uint8(tvb, offset+2);
1094 ts_min = tvb_get_uint8(tvb, offset+3);
1095 ts_sec = tvb_get_uint8(tvb, offset+4);
1096 ts_ms = tvb_get_letohs(tvb, offset+5);
1097
1098 lg8979_ts_tree = proto_tree_add_subtree_format(lg8979_point_tree, tvb, offset, 7, ett_lg8979_ts, NULL,
1099 "SOE Time Stamp: [%02d/%02d %02d:%02d:%02d.%03d]", ts_mon, ts_day, ts_hr, ts_min, ts_sec, ts_ms);
1100
1101 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_mon, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1102 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_day, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
1103 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_hour, tvb, offset+2, 1, ENC_LITTLE_ENDIAN);
1104 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_min, tvb, offset+3, 1, ENC_LITTLE_ENDIAN);
1105 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_sec, tvb, offset+4, 1, ENC_LITTLE_ENDIAN);
1106 proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_msec, tvb, offset+5, 2, ENC_LITTLE_ENDIAN);
1107 offset += 7;
1108 }
1109
1110 break;
1111
1112 /* Function Code 21 SBO Select - Echo of Master->RTU Message */
1113 case LG8979_FC_SBO_SELECT:
1114
1115 /* Get 8-bit point number and trip/close command-code */
1116 ptnum = tvb_get_uint8(tvb, offset);
1117 tripclose = (tvb_get_uint8(tvb, offset+1) & 0x80) >> 7;
1118
1119 lg8979_point_tree = proto_tree_add_subtree_format(
1120 lg8979_tree, tvb, offset, 2,
1121 ett_lg8979_point, NULL,
1122 "SBO Command, Pt.Num: %u, Code: %s",
1123 ptnum,
1124 val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
1125
1126 /* Update the Information Column with Command Details */
1127 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u, Code: %s",
1128 ptnum, val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
1129
1130 /* Add SBO Select Details to tree */
1131 proto_tree_add_item(lg8979_point_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1132 proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_tripclose, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
1133 proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_timercnt, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
1134 offset += 2;
1135 break;
1136
1137 /* Function Code 22 SBO Operate - Echo of Master->RTU Message */
1138 case LG8979_FC_SBO_OPERATE:
1139
1140 /* Get 8-bit point number */
1141 ptnum = tvb_get_uint8(tvb, offset);
1142
1143 /* Update the Information Column with Command Details */
1144 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u", ptnum);
1145
1146 /* Add 8-bit point number to tree */
1147 proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1148 offset += 1;
1149 break;
1150
1151 /* Function Code 31 RTU Configuration */
1152 case LG8979_FC_RTU_CONFIG:
1153
1154 /* Number of IO Chassis */
1155 num_chassis = tvb_get_uint8(tvb, offset);
1156 proto_tree_add_item(lg8979_tree, hf_lg8979_rtucfg_num_chassis, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1157 offset += 1;
1158
1159 for (cnt=0; cnt<num_chassis; cnt++) {
1160 /* Chassis Number */
1161 proto_tree_add_item(lg8979_tree, hf_lg8979_rtucfg_chassis_num, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1162 offset += 1;
1163
1164 /* Card Codes For Each Slot (0-15) */
1165 for (cnt1=0; cnt1<16; cnt1++) {
1166 lg8979_slot_item = proto_tree_add_item(lg8979_tree, hf_lg8979_rtucfg_card_slot, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1167 proto_item_prepend_text(lg8979_slot_item, "Slot %d, ", cnt1);
1168 offset += 1;
1169 }
1170 }
1171
1172 break;
1173
1174 /* Function Code 33 Time Bias */
1175 case LG8979_FC_TIME_BIAS:
1176 /* Add Time Bias "Processing Time" to tree */
1177 proto_tree_add_item(lg8979_tree, hf_lg8979_timebias_proctime, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1178 offset += 1;
1179 break;
1180
1181 /* Function Code 39 Firmware Configuration */
1182 case LG8979_FC_FIRMWARE_CFG:
1183 proto_tree_add_item(lg8979_tree, hf_lg8979_firmware_ver, tvb, offset, 2, ENC_LITTLE_ENDIAN);
1184 offset += 2;
1185 break;
1186
1187 /* Function Code 63 Exception Report */
1188 /* Parameter byte is context-sensitive to the Code byte used */
1189 /* For example, if the Code byte is 0x01 (Cold Start) the parameter byte is always 0 */
1190 /* If the code byte is 0x09 (Function Code), the parameter byte is the value of the disallowed function code */
1191 case LG8979_FC_EXP_RPT:
1192
1193 exp_code = tvb_get_uint8(tvb, offset);
1194
1195 proto_tree_add_item(lg8979_tree, hf_lg8979_exprpt_code, tvb, offset, 1, ENC_LITTLE_ENDIAN);
1196 proto_tree_add_item(lg8979_tree, hf_lg8979_exprpt_parm, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
1197 /* Function code lookup, if required */
1198 if (exp_code == 14) {
1199 proto_item *lg8979_dfc_item;
1200 lg8979_dfc_item = proto_tree_add_item(lg8979_tree, hf_lg8979_disallowed_func, tvb, offset+1, 1, ENC_NA);
1201 proto_item_set_generated(lg8979_dfc_item);
1202 }
1203
1204 offset += 2;
1205 break;
1206
1207 default:
1208 break;
1209 }
1210
1211 } /* !shr */
1212
1213 if (shr) {
1214 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Short Response");
1215 }
1216
1217 /* Add CRC-16 */
1218 proto_tree_add_item(lg8979_tree, hf_lg8979_crc16, tvb, offset, 2, ENC_BIG_ENDIAN);
1219
1220 } /* packet type */
1221
1222 return tvb_reported_length(tvb);
1223
1224 }
1225
1226 /******************************************************************************************************/
1227 /* Return length of L&G 8979 Protocol over TCP message (used for re-assembly) */
1228 /******************************************************************************************************/
1229 static unsigned
1230 get_lg8979_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset _U_, void *data _U_)
1231 {
1232
1233 unsigned len;
1234 len = tvb_reported_length(tvb); /* XXX: should really be some minimum length ?? */
1235
1236 return len;
1237 }
1238
1239 /******************************************************************************************************/
1240 /* Dissect (and possibly Re-assemble) L&G 8979 protocol payload data */
1241 /******************************************************************************************************/
1242 static int
1243 dissect_lg8979_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
1244 {
1245
1246 int length = tvb_reported_length(tvb);
1247
1248 /* Check for a L&G8979 packet. It should begin with 0xFF */
1249 if(length < 2 || tvb_get_uint8(tvb, 0) != 0xFF) {
1250 /* Not a L&G 8979 Protocol packet, just happened to use the same port */
1251 return 0;
1252 }
1253
1254 tcp_dissect_pdus(tvb, pinfo, tree, lg8979_desegment, 1,
1255 get_lg8979_len, dissect_lg8979, data);
1256
1257 return length;
1258 }
1259
1260
1261 /******************************************************************************************************/
1262 /* Dissect "simple" L&G 8979 protocol payload (no TCP re-assembly) */
1263 /******************************************************************************************************/
1264 static int
1265 dissect_lg8979_simple(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
1266 {
1267 int length = tvb_reported_length(tvb);
1268
1269 /* Check for a L&G8979 packet. It should begin with 0xFF */
1270 if(length < 2 || tvb_get_uint8(tvb, 0) != 0xFF) {
1271 /* Not a L&G 8979 Protocol packet ... */
1272 return 0;
1273 }
1274
1275 dissect_lg8979(tvb, pinfo, tree, data);
1276
1277 return length;
1278 }
1279
1280 /******************************************************************************************************/
1281 /* Register the protocol with Wireshark */
1282 /******************************************************************************************************/
1283 void proto_reg_handoff_lg8979(void);
1284
1285 void
1286 proto_register_lg8979(void)
1287 {
1288 /* L&G 8979 Protocol header fields */
1289 static hf_register_info lg8979_hf[] = {
1290 { &hf_lg8979_header,
1291 { "Header", "lg8979.header", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1292 { &hf_lg8979_flags,
1293 { "Flags", "lg8979.flags", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL }},
1294 { &hf_lg8979_shr,
1295 { "SHR", "lg8979.shr", FT_UINT8, BASE_DEC, NULL, 0x80, "Short Response Flag", HFILL }},
1296 { &hf_lg8979_mfc,
1297 { "MFC", "lg8979.mfc", FT_UINT8, BASE_DEC, NULL, 0x78, "Multi Function Code", HFILL }},
1298 { &hf_lg8979_ack,
1299 { "ACK", "lg8979.ack", FT_UINT8, BASE_DEC, NULL, 0x04, "Acknowledge Flag", HFILL }},
1300 { &hf_lg8979_con,
1301 { "CON", "lg8979.con", FT_UINT8, BASE_DEC, NULL, 0x40, "Continuation Flag", HFILL }},
1302 { &hf_lg8979_frz,
1303 { "FRZ", "lg8979.frz", FT_UINT8, BASE_DEC, NULL, 0x20, "Accumulator Freeze Flag", HFILL }},
1304 { &hf_lg8979_ind,
1305 { "IND", "lg8979.ind", FT_UINT8, BASE_DEC, NULL, 0x10, "Indication Change Flag", HFILL }},
1306 { &hf_lg8979_sch,
1307 { "SCH", "lg8979.sch", FT_UINT8, BASE_DEC, NULL, 0x08, "SOE Change Flag", HFILL }},
1308 { &hf_lg8979_slg,
1309 { "SLG", "lg8979.slg", FT_UINT8, BASE_DEC, NULL, 0x04, "SOE Log Flag", HFILL }},
1310 { &hf_lg8979_address,
1311 { "RTU Address", "lg8979.address", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1312 { &hf_lg8979_lastblock,
1313 { "Last Block Mark", "lg8979.lastblock", FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL }},
1314 { &hf_lg8979_funccode,
1315 { "Function Code", "lg8979.funccode", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &lg8979_funccode_vals_ext, 0x7F, NULL, HFILL }},
1316 { &hf_lg8979_length,
1317 { "Data Length", "lg8979.length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1318 { &hf_lg8979_start_ptnum16,
1319 { "Start Point Number (16-bit)", "lg8979.start_ptnum16", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1320 { &hf_lg8979_start_ptnum8,
1321 { "Start Point Number (8-bit)", "lg8979.start_ptnum8", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1322 { &hf_lg8979_stop_ptnum16,
1323 { "Stop Point Number (16-bit)", "lg8979.stop_ptnum16", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1324 { &hf_lg8979_stop_ptnum8,
1325 { "Stop Point Number (8-bit)", "lg8979.stop_ptnum8", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1326 { &hf_lg8979_ang_point,
1327 { "Analog Point", "lg8979.ang_point", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1328 { &hf_lg8979_adc_ref_zero,
1329 { "ADC Reference (0%)", "lg8979.adc_ref_zero", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1330 { &hf_lg8979_adc_ref_neg90,
1331 { "ADC Reference (-90%)", "lg8979.adc_ref_neg90", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1332 { &hf_lg8979_adc_ref_pos90,
1333 { "ADC Reference (+90%)", "lg8979.adc_ref_pos90", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1334 { &hf_lg8979_ind_chgrpt_ptnum,
1335 { "Point Number (12-bit)", "lg8979.ind_chgrpt_ptnum", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
1336 { &hf_lg8979_ind_chgrpt_status,
1337 { "Status Bit", "lg8979.ind_chgrpt_status", FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL }},
1338 { &hf_lg8979_ind_chgrpt_change,
1339 { "Change Bit", "lg8979.ind_chgrpt_change", FT_UINT16, BASE_DEC, NULL, 0x4000, NULL, HFILL }},
1340 { &hf_lg8979_ind_frcrpt_status_b0,
1341 { "Status Bit 0", "lg8979.ind.frcrpt.status_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
1342 { &hf_lg8979_ind_frcrpt_status_b1,
1343 { "Status Bit 1", "lg8979.ind.frcrpt.status_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
1344 { &hf_lg8979_ind_frcrpt_status_b2,
1345 { "Status Bit 2", "lg8979.ind.frcrpt.status_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
1346 { &hf_lg8979_ind_frcrpt_status_b3,
1347 { "Status Bit 3", "lg8979.ind.frcrpt.status_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
1348 { &hf_lg8979_ind_frcrpt_status_b4,
1349 { "Status Bit 4", "lg8979.ind.frcrpt.status_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
1350 { &hf_lg8979_ind_frcrpt_status_b5,
1351 { "Status Bit 5", "lg8979.ind.frcrpt.status_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
1352 { &hf_lg8979_ind_frcrpt_status_b6,
1353 { "Status Bit 6", "lg8979.ind.frcrpt.status_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
1354 { &hf_lg8979_ind_frcrpt_status_b7,
1355 { "Status Bit 7", "lg8979.ind.frcrpt.status_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
1356 { &hf_lg8979_ind_frcrpt_change_b0,
1357 { "Change Bit 0", "lg8979.ind.frcrpt.change_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
1358 { &hf_lg8979_ind_frcrpt_change_b1,
1359 { "Change Bit 1", "lg8979.ind.frcrpt.change_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
1360 { &hf_lg8979_ind_frcrpt_change_b2,
1361 { "Change Bit 2", "lg8979.ind.frcrpt.change_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
1362 { &hf_lg8979_ind_frcrpt_change_b3,
1363 { "Change Bit 3", "lg8979.ind.frcrpt.change_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
1364 { &hf_lg8979_ind_frcrpt_change_b4,
1365 { "Change Bit 4", "lg8979.ind.frcrpt.change_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
1366 { &hf_lg8979_ind_frcrpt_change_b5,
1367 { "Change Bit 5", "lg8979.ind.frcrpt.change_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
1368 { &hf_lg8979_ind_frcrpt_change_b6,
1369 { "Change Bit 6", "lg8979.ind.frcrpt.change_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
1370 { &hf_lg8979_ind_frcrpt_change_b7,
1371 { "Change Bit 7", "lg8979.ind.frcrpt.change_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
1372 { &hf_lg8979_soe_chgrpt_ptnum,
1373 { "Point Number (12-bit)", "lg8979.soe_chgrpt_ptnum", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
1374 { &hf_lg8979_soe_chgrpt_status,
1375 { "Status Bit", "lg8979.soe_chgrpt_status", FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL }},
1376 { &hf_lg8979_soe_chgrpt_change,
1377 { "Change Bit", "lg8979.soe_chgrpt_change", FT_UINT16, BASE_DEC, NULL, 0x4000, NULL, HFILL }},
1378 { &hf_lg8979_soe_frcrpt_status_b0,
1379 { "Status Bit 0", "lg8979.soe.frcrpt.status_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
1380 { &hf_lg8979_soe_frcrpt_status_b1,
1381 { "Status Bit 1", "lg8979.soe.frcrpt.status_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
1382 { &hf_lg8979_soe_frcrpt_status_b2,
1383 { "Status Bit 2", "lg8979.soe.frcrpt.status_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
1384 { &hf_lg8979_soe_frcrpt_status_b3,
1385 { "Status Bit 3", "lg8979.soe.frcrpt.status_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
1386 { &hf_lg8979_soe_frcrpt_status_b4,
1387 { "Status Bit 4", "lg8979.soe.frcrpt.status_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
1388 { &hf_lg8979_soe_frcrpt_status_b5,
1389 { "Status Bit 5", "lg8979.soe.frcrpt.status_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
1390 { &hf_lg8979_soe_frcrpt_status_b6,
1391 { "Status Bit 6", "lg8979.soe.frcrpt.status_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
1392 { &hf_lg8979_soe_frcrpt_status_b7,
1393 { "Status Bit 7", "lg8979.soe.frcrpt.status_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
1394 { &hf_lg8979_soe_frcrpt_change_b0,
1395 { "Change Bit 0", "lg8979.soe.frcrpt.change_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
1396 { &hf_lg8979_soe_frcrpt_change_b1,
1397 { "Change Bit 1", "lg8979.soe.frcrpt.change_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
1398 { &hf_lg8979_soe_frcrpt_change_b2,
1399 { "Change Bit 2", "lg8979.soe.frcrpt.change_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
1400 { &hf_lg8979_soe_frcrpt_change_b3,
1401 { "Change Bit 3", "lg8979.soe.frcrpt.change_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
1402 { &hf_lg8979_soe_frcrpt_change_b4,
1403 { "Change Bit 4", "lg8979.soe.frcrpt.change_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
1404 { &hf_lg8979_soe_frcrpt_change_b5,
1405 { "Change Bit 5", "lg8979.soe.frcrpt.change_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
1406 { &hf_lg8979_soe_frcrpt_change_b6,
1407 { "Change Bit 6", "lg8979.soe.frcrpt.change_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
1408 { &hf_lg8979_soe_frcrpt_change_b7,
1409 { "Change Bit 7", "lg8979.soe.frcrpt.change_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
1410 { &hf_lg8979_digin_b0,
1411 { "Digital Input Bit 0", "lg8979.digin_b0", FT_BOOLEAN, 16, NULL, 0x0001, NULL, HFILL }},
1412 { &hf_lg8979_digin_b1,
1413 { "Digital Input Bit 1", "lg8979.digin_b1", FT_BOOLEAN, 16, NULL, 0x0002, NULL, HFILL }},
1414 { &hf_lg8979_digin_b2,
1415 { "Digital Input Bit 2", "lg8979.digin_b2", FT_BOOLEAN, 16, NULL, 0x0004, NULL, HFILL }},
1416 { &hf_lg8979_digin_b3,
1417 { "Digital Input Bit 3", "lg8979.digin_b3", FT_BOOLEAN, 16, NULL, 0x0008, NULL, HFILL }},
1418 { &hf_lg8979_digin_b4,
1419 { "Digital Input Bit 4", "lg8979.digin_b4", FT_BOOLEAN, 16, NULL, 0x0010, NULL, HFILL }},
1420 { &hf_lg8979_digin_b5,
1421 { "Digital Input Bit 5", "lg8979.digin_b5", FT_BOOLEAN, 16, NULL, 0x0020, NULL, HFILL }},
1422 { &hf_lg8979_digin_b6,
1423 { "Digital Input Bit 6", "lg8979.digin_b6", FT_BOOLEAN, 16, NULL, 0x0040, NULL, HFILL }},
1424 { &hf_lg8979_digin_b7,
1425 { "Digital Input Bit 7", "lg8979.digin_b7", FT_BOOLEAN, 16, NULL, 0x0080, NULL, HFILL }},
1426 { &hf_lg8979_digin_b8,
1427 { "Digital Input Bit 8", "lg8979.digin_b8", FT_BOOLEAN, 16, NULL, 0x0100, NULL, HFILL }},
1428 { &hf_lg8979_digin_b9,
1429 { "Digital Input Bit 9", "lg8979.digin_b9", FT_BOOLEAN, 16, NULL, 0x0200, NULL, HFILL }},
1430 { &hf_lg8979_digin_b10,
1431 { "Digital Input Bit 10", "lg8979.digin_b10", FT_BOOLEAN, 16, NULL, 0x0400, NULL, HFILL }},
1432 { &hf_lg8979_digin_b11,
1433 { "Digital Input Bit 11", "lg8979.digin_b11", FT_BOOLEAN, 16, NULL, 0x0800, NULL, HFILL }},
1434 { &hf_lg8979_digin_b12,
1435 { "Digital Input Bit 12", "lg8979.digin_b12", FT_BOOLEAN, 16, NULL, 0x1000, NULL, HFILL }},
1436 { &hf_lg8979_digin_b13,
1437 { "Digital Input Bit 13", "lg8979.digin_b13", FT_BOOLEAN, 16, NULL, 0x2000, NULL, HFILL }},
1438 { &hf_lg8979_digin_b14,
1439 { "Digital Input Bit 14", "lg8979.digin_b14", FT_BOOLEAN, 16, NULL, 0x4000, NULL, HFILL }},
1440 { &hf_lg8979_digin_b15,
1441 { "Digital Input Bit 15", "lg8979.digin_b15", FT_BOOLEAN, 16, NULL, 0x8000, NULL, HFILL }},
1442 { &hf_lg8979_acc_point,
1443 { "Value", "lg8979.acc_point", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1444 { &hf_lg8979_soe_logchg_ptnum,
1445 { "Point Number", "lg8979.soe_logchg_ptnum", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
1446 { &hf_lg8979_soe_logchg_newstat,
1447 { "New Status", "lg8979.soe_logchg_newstat", FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL }},
1448 { &hf_lg8979_soe_logchg_mon,
1449 { "Month", "lg8979.soe_logchg_mon", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1450 { &hf_lg8979_soe_logchg_day,
1451 { "Day", "lg8979.soe_logchg_day", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1452 { &hf_lg8979_soe_logchg_hour,
1453 { "Hours", "lg8979.soe_logchg_hour", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1454 { &hf_lg8979_soe_logchg_min,
1455 { "Minute", "lg8979.soe_logchg_min", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1456 { &hf_lg8979_soe_logchg_sec,
1457 { "Second", "lg8979.soe_logchg_sec", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1458 { &hf_lg8979_soe_logchg_msec,
1459 { "Milli-Second", "lg8979.soe_logchg_msec", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1460 { &hf_lg8979_ang_output_val,
1461 { "Point Value", "lg8979.ang_output_val", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
1462 { &hf_lg8979_sbo_tripclose,
1463 { "Trip/Close Control Code", "lg8979.sbo_tripclose", FT_UINT8, BASE_DEC, VALS(lg8979_sbo_tripclose_vals), 0x80, NULL, HFILL }},
1464 { &hf_lg8979_sbo_timercnt,
1465 { "Timer Count", "lg8979.sbo_timercnt", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL }},
1466 { &hf_lg8979_digout_data,
1467 { "Data", "lg8979.digout_data", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1468 { &hf_lg8979_pul_output_base,
1469 { "Base Time", "lg8979.pul_output_base", FT_UINT8, BASE_HEX, VALS(lg8979_pul_output_base_vals), 0x03, NULL, HFILL }},
1470 { &hf_lg8979_pul_output_dur,
1471 { "Duration", "lg8979.pul_output_dur", FT_UINT8, BASE_HEX, NULL, 0x7C, NULL, HFILL }},
1472 { &hf_lg8979_pul_output_rl,
1473 { "Raise/Lower", "lg8979.pul_output_rl", FT_UINT8, BASE_HEX, VALS(lg8979_pul_output_rl_vals), 0x80, NULL, HFILL }},
1474 { &hf_lg8979_ang_deadband,
1475 { "Deadband", "lg8979.ang_deadband", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1476 { &hf_lg8979_ang_group,
1477 { "Analog Group", "lg8979.ang_group", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1478 { &hf_lg8979_ang_group_pts,
1479 { "Analog Group Points Mask", "lg8979.ang_group_pts", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1480 { &hf_lg8979_acc_preset,
1481 { "Preset Value", "lg8979.acc_preset", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1482 { &hf_lg8979_rtucfg_num_chassis,
1483 { "Number of I/O Chassis in RTU", "lg8979.rtucfg_num_chassis", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1484 { &hf_lg8979_rtucfg_chassis_num,
1485 { "Chassis Number", "lg8979.rtucfg_chassis_num", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1486 { &hf_lg8979_rtucfg_card_slot,
1487 { "Card Code", "lg8979.rtucfg_card_slot", FT_UINT8, BASE_DEC, VALS(lg8979_cardcode_vals), 0x0, NULL, HFILL }},
1488 { &hf_lg8979_timesync_mon,
1489 { "Month", "lg8979.timesync_mon", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1490 { &hf_lg8979_timesync_day,
1491 { "Day", "lg8979.timesync_day", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1492 { &hf_lg8979_timesync_hour,
1493 { "Hours", "lg8979.timesync_hour", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1494 { &hf_lg8979_timesync_min,
1495 { "Minute", "lg8979.timesync_min", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1496 { &hf_lg8979_timesync_sec,
1497 { "Second", "lg8979.timesync_sec", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1498 { &hf_lg8979_timesync_msec,
1499 { "Milli-Second", "lg8979.timesync_msec", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1500 { &hf_lg8979_timebias_value,
1501 { "Time Bias Value", "lg8979.timebias_value", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1502 { &hf_lg8979_firmware_ver,
1503 { "Firmware Version", "lg8979.firmware_ver", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1504 { &hf_lg8979_timebias_proctime,
1505 { "Time Bias Processing Time (ms)", "lg8979.timebias_proctime", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1506 { &hf_lg8979_exprpt_code,
1507 { "Exception Report Code", "lg8979.exprpt_code", FT_UINT8, BASE_DEC, VALS(lg8979_exprpt_code_vals), 0x0, NULL, HFILL }},
1508 { &hf_lg8979_exprpt_parm,
1509 { "Value", "lg8979.exprpt_parm", FT_UINT8, BASE_DEC, VALS(lg8979_exprpt_parm_vals), 0x0, NULL, HFILL }},
1510 { &hf_lg8979_disallowed_func,
1511 { "Disallowed Function Code", "lg8979.disallowed_func", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &lg8979_funccode_vals_ext, 0x0, NULL, HFILL }},
1512 { &hf_lg8979_crc16,
1513 { "CRC-16", "lg8979.crc16", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1514
1515 };
1516
1517 /* Setup protocol subtree array */
1518 static int *ett[] = {
1519 &ett_lg8979,
1520 &ett_lg8979_flags,
1521 &ett_lg8979_funccode,
1522 &ett_lg8979_point,
1523 &ett_lg8979_ts,
1524 };
1525
1526 module_t *lg8979_module;
1527
1528 /* Register the protocol name and description */
1529 proto_lg8979 = proto_register_protocol("Landis & Gyr Telegyr 8979", "L&G 8979", "lg8979");
1530
1531 /* Registering protocol to be called by another dissector */
1532 register_dissector("lg8979", dissect_lg8979_simple, proto_lg8979);
1533
1534 /* Required function calls to register the header fields and subtrees used */
1535 proto_register_field_array(proto_lg8979, lg8979_hf, array_length(lg8979_hf));
1536 proto_register_subtree_array(ett, array_length(ett));
1537
1538
1539 /* Register required preferences for L&G 8979 register decoding */
1540 lg8979_module = prefs_register_protocol(proto_lg8979, NULL);
1541
1542 /* L&G 8979 - Desegmentmentation; defaults to true for TCP desegmentation*/
1543 prefs_register_bool_preference(lg8979_module, "desegment",
1544 "Desegment all L&G 8979 Protocol packets spanning multiple TCP segments",
1545 "Whether the L&G 8979 dissector should desegment all messages spanning multiple TCP segments",
1546 &lg8979_desegment);
1547 }
1548
1549 /******************************************************************************************************/
1550 void
1551 proto_reg_handoff_lg8979(void)
1552 {
1553 dissector_handle_t lg8979_handle;
1554
1555 /* Make sure to use L&G 8979 Protocol Preferences field to determine default TCP port */
1556 lg8979_handle = create_dissector_handle(dissect_lg8979_tcp, proto_lg8979);
1557
1558 dissector_add_for_decode_as_with_preference("tcp.port", lg8979_handle);
1559 dissector_add_for_decode_as("rtacser.data", lg8979_handle);
1560 }
1561
1562 /*
1563 * Editor modelines - https://www.wireshark.org/tools/modelines.html
1564 *
1565 * Local variables:
1566 * c-basic-offset: 4
1567 * tab-width: 8
1568 * indent-tabs-mode: nil
1569 * End:
1570 *
1571 * vi: set shiftwidth=4 tabstop=8 expandtab:
1572 * :indentSize=4:tabSize=8:noTabs=true:
1573 */
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