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Revert "TODO epan/dissectors/asn1/kerberos/packet-kerberos-template.c new GSS flags"
[wireshark-sm.git] / plugins / epan / profinet / packet-pn-rt.c
blob0dd64326e01300bf604f33155d95aaefe3ee2d74
1 /* packet-pn-rt.c
2 * Routines for pn-rt (PROFINET Real-Time) packet dissection.
3 * This is the base for other PROFINET protocols like IO, CBA, DCP, ...
4 * (the "content subdissectors" will register themselves using a heuristic)
5 *
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1999 Gerald Combs
9 *
10 * SPDX-License-Identifier: GPL-2.0-or-later
11 */
12
13 #include "config.h"
14
15 #include <epan/packet.h>
16 #include <epan/reassemble.h>
17 #include <epan/prefs.h>
18 #include <epan/etypes.h>
19 #include <epan/expert.h>
20 #include <epan/crc16-tvb.h>
21 #include <epan/tfs.h>
22 #include <wsutil/array.h>
23 #include <epan/dissectors/packet-dcerpc.h>
24
25 #include <wsutil/crc16-plain.h>
26 #include "packet-pn.h"
27
28
29 void proto_register_pn_rt(void);
30 void proto_reg_handoff_pn_rt(void);
31
32 #define PROFINET_UDP_PORT 0x8892
33
34 /* Define the pn-rt proto */
35 static int proto_pn_rt;
36 static bool pnio_desegment = true;
37
38 static dissector_handle_t pn_rt_handle;
39
40 /* Define many header fields for pn-rt */
41 static int hf_pn_rt_frame_id;
42 static int hf_pn_rt_cycle_counter;
43 static int hf_pn_rt_transfer_status;
44 static int hf_pn_rt_data_status;
45 static int hf_pn_rt_data_status_ignore;
46 static int hf_pn_rt_frame_info_type;
47 static int hf_pn_rt_frame_info_function_meaning_input_conv;
48 static int hf_pn_rt_frame_info_function_meaning_output_conv;
49 static int hf_pn_rt_data_status_Reserved_2;
50 static int hf_pn_rt_data_status_ok;
51 static int hf_pn_rt_data_status_operate;
52 static int hf_pn_rt_data_status_res3;
53 static int hf_pn_rt_data_status_valid;
54 static int hf_pn_rt_data_status_redundancy;
55 static int hf_pn_rt_data_status_redundancy_output_cr;
56 static int hf_pn_rt_data_status_redundancy_input_cr_state_is_backup;
57 static int hf_pn_rt_data_status_redundancy_input_cr_state_is_primary;
58 static int hf_pn_rt_data_status_primary;
59
60 static int hf_pn_rt_sf_crc16;
61 static int hf_pn_rt_sf_crc16_status;
62 static int hf_pn_rt_sf;
63 static int hf_pn_rt_sf_position;
64 /* static int hf_pn_rt_sf_position_control; */
65 static int hf_pn_rt_sf_data_length;
66 static int hf_pn_rt_sf_cycle_counter;
67
68 static int hf_pn_rt_frag;
69 static int hf_pn_rt_frag_data_length;
70 static int hf_pn_rt_frag_status;
71 static int hf_pn_rt_frag_status_more_follows;
72 static int hf_pn_rt_frag_status_error;
73 static int hf_pn_rt_frag_status_fragment_number;
74 static int hf_pn_rt_frag_data;
75
76
77 /*
78 * Define the trees for pn-rt
79 * We need one tree for pn-rt itself and one for the pn-rt data status subtree
80 */
81 static int ett_pn_rt;
82 static int ett_pn_rt_data_status;
83 static int ett_pn_rt_sf;
84 static int ett_pn_rt_frag;
85 static int ett_pn_rt_frag_status;
86
87 static expert_field ei_pn_rt_sf_crc16;
88
89 /*
90 * Here are the global variables associated with
91 * the various user definable characteristics of the dissection
92 */
93 /* Place summary in proto tree */
94 static bool pn_rt_summary_in_tree = true;
95
96 /* heuristic to find the right pn-rt payload dissector */
97 static heur_dissector_list_t heur_subdissector_list;
98
99
100 #if 0
101 static const value_string pn_rt_position_control[] = {
102 { 0x00, "CRC16 and CycleCounter shall not be checked" },
103 { 0x80, "CRC16 and CycleCounter valid" },
104 { 0, NULL }
105 };
106 #endif
107
108 static const true_false_string tfs_pn_rt_ds_redundancy_output_cr =
109 { "Unknown", "Redundancy has no meaning for OutputCRs, it is set to the fixed value of zero" };
110
111 static const true_false_string tfs_pn_rt_ds_redundancy_input_cr_state_is_backup =
112 { "None primary AR of a given AR-set is present", "Default - One primary AR of a given AR-set is present" };
113
114 static const true_false_string tfs_pn_rt_ds_redundancy_input_cr_state_is_primary =
115 { "The ARState from the IO device point of view is Backup", "Default - The ARState from the IO device point of view is Primary" };
116
117 static const value_string pn_rt_frame_info_function_meaning_input_conv[] = {
118 {0x00, "Backup Acknowledge without actual data" },
119 {0x02, "Primary Missing without actual data" },
120 {0x04, "Backup Acknowledge with actual data independent from the Arstate" },
121 {0x05, "Primary Acknowledge"},
122 {0x06, "Primary Missing with actual data independent from the Arstate" },
123 {0x07, "Primary Fault" },
124 {0, NULL}
125 };
126
127 static const value_string pn_rt_frame_info_function_meaning_output_conv[] = {
128 { 0x04, "Backup Request" },
129 { 0x05, "Primary Request" },
130 { 0, NULL }
131 };
132
133 static const true_false_string tfs_pn_rt_ds_redundancy =
134 { "None primary AR of a given AR-set is present", "Redundancy has no meaning for OutputCRs / One primary AR of a given AR-set is present" };
135
136 static const value_string pn_rt_frag_status_error[] = {
137 { 0x00, "reserved" },
138 { 0x01, "reserved: invalid should be zero" },
139 { 0, NULL }
140 };
141
142 static const value_string pn_rt_frag_status_more_follows[] = {
143 { 0x00, "Last fragment" },
144 { 0x01, "More fragments follow" },
145 { 0, NULL }
146 };
147
148 /* Copied and renamed from proto.c because global value_strings don't work for plugins */
149 static const value_string plugin_proto_checksum_vals[] = {
150 { PROTO_CHECKSUM_E_BAD, "Bad" },
151 { PROTO_CHECKSUM_E_GOOD, "Good" },
152 { PROTO_CHECKSUM_E_UNVERIFIED, "Unverified" },
153 { PROTO_CHECKSUM_E_NOT_PRESENT, "Not present" },
154
155 { 0, NULL }
156 };
157
158 static void
159 dissect_DataStatus(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info *pinfo, uint8_t u8DataStatus)
160 {
161 proto_item *sub_item;
162 proto_tree *sub_tree;
163 uint8_t u8DataValid;
164 uint8_t u8Redundancy;
165 uint8_t u8State;
166 conversation_t *conversation;
167 bool inputFlag = false;
168 bool outputFlag = false;
169 apduStatusSwitch *apdu_status_switch;
170
171 u8State = (u8DataStatus & 0x01);
172 u8Redundancy = (u8DataStatus >> 1) & 0x01;
173 u8DataValid = (u8DataStatus >> 2) & 0x01;
174
175 /* if PN Connect Request has been read, IOC mac is dl_src and IOD mac is dl_dst */
176 conversation = find_conversation(pinfo->num, &pinfo->dl_src, &pinfo->dl_dst, CONVERSATION_UDP, 0, 0, 0);
177
178 if (conversation != NULL) {
179 apdu_status_switch = (apduStatusSwitch*)conversation_get_proto_data(conversation, proto_pn_io_apdu_status);
180 if (apdu_status_switch != NULL && apdu_status_switch->isRedundancyActive) {
181 /* IOC -> IOD: OutputCR */
182 if (addresses_equal(&(pinfo->dst), conversation_key_addr1(conversation->key_ptr)) && addresses_equal(&(pinfo->src), conversation_key_addr2(conversation->key_ptr))) {
183 outputFlag = true;
184 inputFlag = false;
185 }
186 /* IOD -> IOC: InputCR */
187 if (addresses_equal(&(pinfo->src), conversation_key_addr1(conversation->key_ptr)) && addresses_equal(&(pinfo->dst), conversation_key_addr2(conversation->key_ptr))) {
188 inputFlag = true;
189 outputFlag = false;
190 }
191 }
192 }
193
194 /* input conversation is found */
195 if (inputFlag)
196 {
197 proto_tree_add_string_format_value(tree, hf_pn_rt_frame_info_type, tvb,
198 offset, 0, "Input", "Input Frame (IO_Device -> IO_Controller)");
199 }
200 /* output conversation is found. */
201 else if (outputFlag)
202 {
203 proto_tree_add_string_format_value(tree, hf_pn_rt_frame_info_type, tvb,
204 offset, 0, "Output", "Output Frame (IO_Controller -> IO_Device)");
205 }
206
207 sub_item = proto_tree_add_uint_format(tree, hf_pn_rt_data_status,
208 tvb, offset, 1, u8DataStatus,
209 "DataStatus: 0x%02x (Frame: %s and %s, Provider: %s and %s)",
210 u8DataStatus,
211 (u8DataStatus & 0x04) ? "Valid" : "Invalid",
212 (u8DataStatus & 0x01) ? "Primary" : "Backup",
213 (u8DataStatus & 0x20) ? "Ok" : "Problem",
214 (u8DataStatus & 0x10) ? "Run" : "Stop");
215 sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_data_status);
216 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_ignore, tvb, offset, 1, u8DataStatus);
217 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_Reserved_2, tvb, offset, 1, u8DataStatus);
218 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_ok, tvb, offset, 1, u8DataStatus);
219 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_operate, tvb, offset, 1, u8DataStatus);
220 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_res3, tvb, offset, 1, u8DataStatus);
221 /* input conversation is found */
222 if (inputFlag)
223 {
224 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_valid, tvb, offset, 1, u8DataStatus);
225 proto_tree_add_uint(tree, hf_pn_rt_frame_info_function_meaning_input_conv, tvb, offset, 1, u8DataStatus);
226 if (u8State == 0 && u8Redundancy == 0 && u8DataValid == 1)
227 {
228 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus);
229 }
230 else if (u8State == 0 && u8Redundancy == 0 && u8DataValid == 0)
231 {
232 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus);
233 }
234 else if (u8State == 0 && u8Redundancy == 1 && u8DataValid == 1)
235 {
236 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus);
237 }
238 else if (u8State == 0 && u8Redundancy == 1 && u8DataValid == 0)
239 {
240 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_backup, tvb, offset, 1, u8DataStatus);
241 }
242 else if (u8State == 1 && u8Redundancy == 0 && u8DataValid == 1)
243 {
244 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_primary, tvb, offset, 1, u8DataStatus);
245 }
246 else if (u8State == 1 && u8Redundancy == 1 && u8DataValid == 1)
247 {
248 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_input_cr_state_is_primary, tvb, offset, 1, u8DataStatus);
249 }
250
251 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_primary, tvb, offset, 1, u8DataStatus);
252 return;
253 }
254 // output conversation is found.
255 else if (outputFlag)
256 {
257 proto_tree_add_uint(tree, hf_pn_rt_frame_info_function_meaning_output_conv, tvb, offset, 1, u8DataStatus);
258
259 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_valid, tvb, offset, 1, u8DataStatus);
260 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy_output_cr, tvb, offset, 1, u8DataStatus);
261 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_primary, tvb, offset, 1, u8DataStatus);
262
263 return;
264 }
265
266 // If no conversation is found
267 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_valid, tvb, offset, 1, u8DataStatus);
268 proto_tree_add_boolean(sub_tree, hf_pn_rt_data_status_redundancy, tvb, offset, 1, u8DataStatus);
269 proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_primary, tvb, offset, 1, u8DataStatus);
270 }
271
272
273 static bool
274 IsDFP_Frame(tvbuff_t *tvb, packet_info *pinfo, uint16_t u16FrameID)
275 {
276 uint16_t u16SFCRC16;
277 uint8_t u8SFPosition;
278 uint8_t u8SFDataLength = 255;
279 int offset = 0;
280 uint32_t u32SubStart;
281 uint16_t crc;
282 int tvb_len = 0;
283 unsigned char virtualFramebuffer[16];
284
285 /* try to build a temporary buffer for generating this CRC */
286 if (!pinfo->src.data || !pinfo->dst.data ||
287 pinfo->dst.type != AT_ETHER || pinfo->src.type != AT_ETHER) {
288 /* if we don't have src/dst mac addresses then we assume it's not
289 * to avoid various crashes */
290 return false;
291 }
292 memcpy(&virtualFramebuffer[0], pinfo->dst.data, 6);
293 memcpy(&virtualFramebuffer[6], pinfo->src.data, 6);
294 virtualFramebuffer[12] = 0x88;
295 virtualFramebuffer[13] = 0x92;
296 virtualFramebuffer[15] = (unsigned char) (u16FrameID &0xff);
297 virtualFramebuffer[14] = (unsigned char) (u16FrameID>>8);
298 crc = crc16_plain_init();
299 crc = crc16_plain_update(crc, &virtualFramebuffer[0], 16);
300 crc = crc16_plain_finalize(crc);
301 /* can check this CRC only by having built a temporary data buffer out of the pinfo data */
302 u16SFCRC16 = tvb_get_letohs(tvb, offset);
303 if (u16SFCRC16 != 0) /* no crc! */
304 {
305 if (u16SFCRC16 != crc)
306 {
307 return false;
308 }
309 }
310 /* end of first CRC check */
311
312 offset += 2; /*Skip first crc */
313 tvb_len = tvb_captured_length(tvb);
314 if (offset + 4 > tvb_len)
315 return false;
316 if (tvb_get_letohs(tvb, offset) == 0)
317 return false; /* no valid DFP frame */
318 while (1) {
319 u32SubStart = offset;
320
321 u8SFPosition = tvb_get_uint8(tvb, offset);
322 offset += 1;
323
324 u8SFDataLength = tvb_get_uint8(tvb, offset);
325 offset += 1;
326
327 if (u8SFDataLength == 0) {
328 break;
329 }
330
331 offset += 2;
332
333 offset += u8SFDataLength;
334 if (offset > tvb_len)
335 return /*true; */false;
336
337 u16SFCRC16 = tvb_get_letohs(tvb, offset);
338 if (u16SFCRC16 != 0) {
339 if (u8SFPosition & 0x80) {
340 crc = crc16_plain_tvb_offset_seed(tvb, u32SubStart, offset-u32SubStart, 0);
341 if (crc != u16SFCRC16) {
342 return false;
343 } else {
344 }
345 } else {
346 }
347 }
348 offset += 2;
349 }
350 return true;
351 }
352
353 /* possibly dissect a CSF_SDU related PN-RT packet */
354 bool
355 dissect_CSF_SDU_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
356 {
357 /* the sub tvb will NOT contain the frame_id here! */
358 uint16_t u16FrameID = GPOINTER_TO_UINT(data);
359 uint16_t u16SFCRC16;
360 uint8_t u8SFPosition;
361 uint8_t u8SFDataLength = 255;
362 uint8_t u8SFCycleCounter;
363 uint8_t u8SFDataStatus;
364 int offset = 0;
365 uint32_t u32SubStart;
366 proto_item *sub_item;
367 proto_tree *sub_tree;
368 uint16_t crc;
369
370
371 /* possible FrameID ranges for DFP */
372 if ((u16FrameID < 0x0100) || (u16FrameID > 0x3FFF))
373 return false;
374 if (IsDFP_Frame(tvb, pinfo, u16FrameID)) {
375 /* can't check this CRC, as the checked data bytes are not available */
376 u16SFCRC16 = tvb_get_letohs(tvb, offset);
377 if (u16SFCRC16 != 0) {
378 /* Checksum verify will always succeed */
379 /* XXX - should we combine the two calls to always show "unverified"? */
380 proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, u16SFCRC16,
381 ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_VERIFY);
382 }
383 else {
384 proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, 0,
385 ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
386 }
387 offset += 2;
388
389 while (1) {
390 sub_item = proto_tree_add_item(tree, hf_pn_rt_sf, tvb, offset, 0, ENC_NA);
391 sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_sf);
392 u32SubStart = offset;
393
394 u8SFPosition = tvb_get_uint8(tvb, offset);
395 proto_tree_add_uint(sub_tree, hf_pn_rt_sf_position, tvb, offset, 1, u8SFPosition);
396 offset += 1;
397
398 u8SFDataLength = tvb_get_uint8(tvb, offset);
399 proto_tree_add_uint(sub_tree, hf_pn_rt_sf_data_length, tvb, offset, 1, u8SFDataLength);
400 offset += 1;
401
402 if (u8SFDataLength == 0) {
403 proto_item_append_text(sub_item, ": Pos:%u, Length:%u", u8SFPosition, u8SFDataLength);
404 proto_item_set_len(sub_item, offset - u32SubStart);
405 break;
406 }
407
408 u8SFCycleCounter = tvb_get_uint8(tvb, offset);
409 proto_tree_add_uint(sub_tree, hf_pn_rt_sf_cycle_counter, tvb, offset, 1, u8SFCycleCounter);
410 offset += 1;
411
412 u8SFDataStatus = tvb_get_uint8(tvb, offset);
413 dissect_DataStatus(tvb, offset, sub_tree, pinfo, u8SFDataStatus);
414 offset += 1;
415
416 offset = dissect_pn_user_data(tvb, offset, pinfo, sub_tree, u8SFDataLength, "DataItem");
417
418 u16SFCRC16 = tvb_get_letohs(tvb, offset);
419
420 if (u16SFCRC16 != 0 /* "old check": u8SFPosition & 0x80 */) {
421 crc = crc16_plain_tvb_offset_seed(tvb, u32SubStart, offset-u32SubStart, 0);
422 proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, crc,
423 ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_VERIFY);
424 } else {
425 proto_tree_add_checksum(tree, tvb, offset, hf_pn_rt_sf_crc16, hf_pn_rt_sf_crc16_status, &ei_pn_rt_sf_crc16, pinfo, 0,
426 ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
427 }
428 offset += 2;
429
430 proto_item_append_text(sub_item, ": Pos:%u, Length:%u, Cycle:%u, Status: 0x%02x (%s,%s,%s,%s)",
431 u8SFPosition, u8SFDataLength, u8SFCycleCounter, u8SFDataStatus,
432 (u8SFDataStatus & 0x04) ? "Valid" : "Invalid",
433 (u8SFDataStatus & 0x01) ? "Primary" : "Backup",
434 (u8SFDataStatus & 0x20) ? "Ok" : "Problem",
435 (u8SFDataStatus & 0x10) ? "Run" : "Stop");
436
437 proto_item_set_len(sub_item, offset - u32SubStart);
438 }
439
440 return true;
441 }
442
443 else {
444 dissect_pn_user_data(tvb, offset, pinfo, tree, tvb_captured_length_remaining(tvb, offset),
445 "PROFINET IO Cyclic Service Data Unit");
446 }
447
448 return false;
449
450 }
451
452 /* for reassemble processing we need some inits.. */
453 /* Register PNIO defrag table init routine. */
454
455 static reassembly_table pdu_reassembly_table;
456 static GHashTable *reassembled_frag_table;
457
458 static dissector_table_t ethertype_subdissector_table;
459
460 static uint32_t start_frag_OR_ID[16];
461
462
463 static void
464 pnio_defragment_init(void)
465 {
466 uint32_t i;
467 for (i=0; i < 16; i++) /* init the reassemble help array */
468 start_frag_OR_ID[i] = 0;
469 reassembled_frag_table = g_hash_table_new(NULL, NULL);
470 }
471
472 static void
473 pnio_defragment_cleanup(void)
474 {
475 g_hash_table_destroy(reassembled_frag_table);
476 }
477
478 /* possibly dissect a FRAG_PDU related PN-RT packet */
479 static bool
480 dissect_FRAG_PDU_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
481 {
482 /* the sub tvb will NOT contain the frame_id here! */
483 uint16_t u16FrameID = GPOINTER_TO_UINT(data);
484 int offset = 0;
485
486
487 /* possible FrameID ranges for FRAG_PDU */
488 if (u16FrameID >= 0xFF80 && u16FrameID <= 0xFF8F) {
489 proto_item *sub_item;
490 proto_tree *sub_tree;
491 proto_item *status_item;
492 proto_tree *status_tree;
493 uint8_t u8FragDataLength;
494 uint8_t u8FragStatus;
495 bool bMoreFollows;
496 uint8_t uFragNumber;
497
498 sub_item = proto_tree_add_item(tree, hf_pn_rt_frag, tvb, offset, 0, ENC_NA);
499 sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_frag);
500
501 u8FragDataLength = tvb_get_uint8(tvb, offset);
502 proto_tree_add_uint(sub_tree, hf_pn_rt_frag_data_length, tvb, offset, 1, u8FragDataLength);
503 offset += 1;
504
505 status_item = proto_tree_add_item(sub_tree, hf_pn_rt_frag_status, tvb, offset, 1, ENC_NA);
506 status_tree = proto_item_add_subtree(status_item, ett_pn_rt_frag_status);
507
508 u8FragStatus = tvb_get_uint8(tvb, offset);
509 proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_more_follows, tvb, offset, 1, u8FragStatus);
510 proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_error, tvb, offset, 1, u8FragStatus);
511 proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_fragment_number, tvb, offset, 1, u8FragStatus);
512 offset += 1;
513 uFragNumber = u8FragStatus & 0x3F; /* bits 0 to 5 */
514 bMoreFollows = (u8FragStatus & 0x80) != 0;
515 proto_item_append_text(status_item, ": Number: %u, %s",
516 uFragNumber,
517 val_to_str_const( (u8FragStatus & 0x80) >> 7, pn_rt_frag_status_more_follows, "Unknown"));
518
519 /* Is this a string or a bunch of bytes? Should it be FT_BYTES? */
520 proto_tree_add_string_format(sub_tree, hf_pn_rt_frag_data, tvb, offset, tvb_captured_length_remaining(tvb, offset), "data",
521 "Fragment Length: %d bytes", tvb_captured_length_remaining(tvb, offset));
522 col_append_fstr(pinfo->cinfo, COL_INFO, " Fragment Length: %d bytes", tvb_captured_length_remaining(tvb, offset));
523
524 dissect_pn_user_data_bytes(tvb, offset, pinfo, sub_tree, tvb_captured_length_remaining(tvb, offset), FRAG_DATA);
525 if ((unsigned)tvb_captured_length_remaining(tvb, offset) < (unsigned)(u8FragDataLength *8)) {
526 proto_item_append_text(status_item, ": FragDataLength out of Framerange -> discarding!");
527 return true;
528 }
529 /* defragmentation starts here */
530 if (pnio_desegment)
531 {
532 uint32_t u32FragID;
533 uint32_t u32ReasembleID /*= 0xfedc ??*/;
534 fragment_head *pdu_frag;
535
536 u32FragID = (u16FrameID & 0xf);
537 if (uFragNumber == 0)
538 { /* this is the first "new" fragment, so set up a new key Id */
539 uint32_t u32FrameKey;
540 u32FrameKey = (pinfo->num << 2) | u32FragID;
541 /* store it in the array */
542 start_frag_OR_ID[u32FragID] = u32FrameKey;
543 }
544 u32ReasembleID = start_frag_OR_ID[u32FragID];
545 /* use frame data instead of "pnio fraglen" which sets 8 octet steps */
546 pdu_frag = fragment_add_seq(&pdu_reassembly_table, tvb, offset,
547 pinfo, u32ReasembleID, NULL, uFragNumber,
548 (tvb_captured_length_remaining(tvb, offset))/*u8FragDataLength*8*/, bMoreFollows, 0);
549
550 if (pdu_frag && !bMoreFollows) /* PDU is complete! and last fragment */
551 { /* store this fragment as the completed fragment in hash table */
552 g_hash_table_insert(reassembled_frag_table, GUINT_TO_POINTER(pinfo->num), pdu_frag);
553 start_frag_OR_ID[u32FragID] = 0; /* reset the starting frame counter */
554 }
555 if (!bMoreFollows) /* last fragment */
556 {
557 pdu_frag = (fragment_head *)g_hash_table_lookup(reassembled_frag_table, GUINT_TO_POINTER(pinfo->num));
558 if (pdu_frag) /* found a matching fragment; dissect it */
559 {
560 uint16_t type;
561 tvbuff_t *pdu_tvb;
562
563 /* create the new tvb for defragmented frame */
564 pdu_tvb = tvb_new_chain(tvb, pdu_frag->tvb_data);
565 /* add the defragmented data to the data source list */
566 add_new_data_source(pinfo, pdu_tvb, "Reassembled Profinet Frame");
567 /* PDU is complete: look for the Ethertype and give it to the appropriate dissection routine */
568 type = tvb_get_ntohs(pdu_tvb, 0);
569 pdu_tvb = tvb_new_subset_remaining(pdu_tvb, 2);
570 if (!dissector_try_uint(ethertype_subdissector_table, type, pdu_tvb, pinfo, tree))
571 call_data_dissector(pdu_tvb, pinfo, tree);
572 }
573 }
574 return true;
575 }
576 else
577 return true;
578 }
579 return false;
580 }
581
582
583 /*
584 * dissect_pn_rt - The dissector for the Soft-Real-Time protocol
585 */
586 static int
587 dissect_pn_rt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
588 {
589 int pdu_len;
590 int data_len;
591 uint16_t u16FrameID;
592 uint8_t u8DataStatus;
593 uint8_t u8TransferStatus;
594 uint16_t u16CycleCounter;
595 const char *pszProtAddInfo;
596 const char *pszProtShort;
597 const char *pszProtSummary;
598 const char *pszProtComment;
599 proto_tree *pn_rt_tree, *ti;
600 char szFieldSummary[100];
601 tvbuff_t *next_tvb;
602 bool bCyclic;
603 heur_dtbl_entry_t *hdtbl_entry;
604 conversation_t* conversation;
605 uint8_t isTimeAware = false;
606
607 /* If the link-layer dissector for the protocol above us knows whether
608 * the packet, as handed to it, includes a link-layer FCS, what it
609 * hands to us should not include the FCS; if that's not the case,
610 * that's a bug in that dissector, and should be fixed there.
611 *
612 * If the link-layer dissector for the protocol above us doesn't know
613 * whether the packet, as handed to us, includes a link-layer FCS,
614 * there are limits as to what can be done there; the dissector
615 * ultimately needs a "yes, it has an FCS" preference setting, which
616 * both the Ethernet and 802.11 dissectors do. If that's not the case
617 * for a dissector, that's a deficiency in that dissector, and should
618 * be fixed there.
619 *
620 * Therefore, we assume we are not handed a packet that includes an
621 * FCS. If we are ever handed such a packet, either the link-layer
622 * dissector needs to be fixed or the link-layer dissector's preference
623 * needs to be set for your capture (even if that means adding such
624 * a preference). This dissector (and other dissectors for protcols
625 * running atop the link layer) should not attempt to process the
626 * FCS themselves, as that will just break things. */
627
628 /* Initialize variables */
629 pn_rt_tree = NULL;
630 ti = NULL;
631
632 /*
633 * Set the columns now, so that they'll be set correctly if we throw
634 * an exception. We can set them (or append things) later again ....
635 */
636
637 col_set_str(pinfo->cinfo, COL_PROTOCOL, "PN-RT");
638 col_set_str(pinfo->cinfo, COL_INFO, "PROFINET Real-Time");
639
640 pdu_len = tvb_reported_length(tvb);
641 if (pdu_len < 6) {
642 dissect_pn_malformed(tvb, 0, pinfo, tree, pdu_len);
643 return 0;
644 }
645
646 /* TimeAwareness Information needed for differentiating RTC3 - RTSteam frames */
647 conversation = find_conversation(pinfo->num, &pinfo->dl_src, &pinfo->dl_dst, CONVERSATION_NONE, 0, 0, 0);
648
649 if (conversation != NULL) {
650 isTimeAware = GPOINTER_TO_UINT(conversation_get_proto_data(conversation, proto_pn_io_time_aware_status));
651 }
652
653 /* build some "raw" data */
654 u16FrameID = tvb_get_ntohs(tvb, 0);
655 if (u16FrameID <= 0x001F) {
656 pszProtShort = "PN-RT";
657 pszProtAddInfo = "reserved, ";
658 pszProtSummary = "Real-Time";
659 pszProtComment = "0x0000-0x001F: Reserved ID";
660 bCyclic = false;
661 } else if (u16FrameID <= 0x0021) {
662 pszProtShort = "PN-PTCP";
663 pszProtAddInfo = "Synchronization, ";
664 pszProtSummary = "Real-Time";
665 pszProtComment = "0x0020-0x0021: Real-Time: Sync (with follow up)";
666 bCyclic = false;
667 } else if (u16FrameID <= 0x007F) {
668 pszProtShort = "PN-RT";
669 pszProtAddInfo = "reserved, ";
670 pszProtSummary = "Real-Time";
671 pszProtComment = "0x0022-0x007F: Reserved ID";
672 bCyclic = false;
673 } else if (u16FrameID <= 0x0081) {
674 pszProtShort = "PN-PTCP";
675 pszProtAddInfo = "Synchronization, ";
676 pszProtSummary = "Isochronous-Real-Time";
677 pszProtComment = "0x0080-0x0081: Real-Time: Sync (without follow up)";
678 bCyclic = false;
679 } else if (u16FrameID <= 0x00FF) {
680 pszProtShort = "PN-RT";
681 pszProtAddInfo = "reserved, ";
682 pszProtSummary = "Real-Time";
683 pszProtComment = "0x0082-0x00FF: Reserved ID";
684 bCyclic = false;
685 } else if (u16FrameID <= 0x6FF && !isTimeAware) {
686 pszProtShort = "PN-RTC3";
687 pszProtAddInfo = "RTC3, ";
688 pszProtSummary = "Isochronous-Real-Time";
689 pszProtComment = "0x0100-0x06FF: RED: Real-Time(class=3): non redundant, normal or DFP";
690 bCyclic = true;
691 } else if (u16FrameID <= 0x0FFF && !isTimeAware) {
692 pszProtShort = "PN-RTC3";
693 pszProtAddInfo = "RTC3, ";
694 pszProtSummary = "Isochronous-Real-Time";
695 pszProtComment = "0x0700-0x0FFF: RED: Real-Time(class=3): redundant, normal or DFP";
696 bCyclic = true;
697 } else if (u16FrameID <= 0x7FFF && !isTimeAware) {
698 pszProtShort = "PN-RT";
699 pszProtAddInfo = "reserved, ";
700 pszProtSummary = "Real-Time";
701 pszProtComment = "0x1000-0x7FFF: Reserved ID";
702 bCyclic = false;
703 } else if (u16FrameID <= 0x0FFF && isTimeAware) {
704 pszProtShort = "PN-RT";
705 pszProtAddInfo = "reserved, ";
706 pszProtSummary = "Real-Time";
707 pszProtComment = "0x0100-0x0FFF: Reserved ID";
708 bCyclic = false;
709 } else if (u16FrameID <= 0x2FFF && isTimeAware) {
710 pszProtShort = "PN-RTCS";
711 pszProtAddInfo = "RT_STREAM, ";
712 pszProtSummary = "Real-Time";
713 pszProtComment = "0x1000-0x2FFF: RT_CLASS_STREAM";
714 bCyclic = true;
715 } else if (u16FrameID <= 0x37FF && isTimeAware) {
716 pszProtShort = "PN-RT";
717 pszProtAddInfo = "reserved, ";
718 pszProtSummary = "Real-Time";
719 pszProtComment = "0x3000-0x37FF: Reserved ID";
720 bCyclic = false;
721 } else if (u16FrameID <= 0x3FFF && isTimeAware) {
722 pszProtShort = "PN-RTCS";
723 pszProtAddInfo = "RT_STREAM, ";
724 pszProtSummary = "Real-Time";
725 pszProtComment = "0x3800-0x3FFF: RT_CLASS_STREAM";
726 bCyclic = true;
727 } else if (u16FrameID <= 0xBBFF) {
728 pszProtShort = "PN-RTC1";
729 pszProtAddInfo = "RTC1, ";
730 pszProtSummary = "cyclic Real-Time";
731 pszProtComment = "0x8000-0xBBFF: Real-Time(class=1 unicast): non redundant, normal";
732 bCyclic = true;
733 } else if (u16FrameID <= 0xBFFF) {
734 pszProtShort = "PN-RTC1";
735 pszProtAddInfo = "RTC1, ";
736 pszProtSummary = "cyclic Real-Time";
737 pszProtComment = "0xBC00-0xBFFF: Real-Time(class=1 multicast): non redundant, normal";
738 bCyclic = true;
739 } else if (u16FrameID <= 0xF7FF) {
740 /* check if udp frame on PNIO port */
741 if (pinfo->destport == 0x8892)
742 { /* UDP frame */
743 pszProtShort = "PN-RTCUDP,";
744 pszProtAddInfo = "RT_CLASS_UDP, ";
745 pszProtComment = "0xC000-0xF7FF: Real-Time(UDP unicast): Cyclic";
746 }
747 else
748 { /* layer 2 frame */
749 pszProtShort = "PN-RT";
750 pszProtAddInfo = "RTC1(legacy), ";
751 pszProtComment = "0xC000-0xF7FF: Real-Time(class=1 unicast): Cyclic";
752 }
753 pszProtSummary = "cyclic Real-Time";
754 bCyclic = true;
755 } else if (u16FrameID <= 0xFBFF) {
756 if (pinfo->destport == 0x8892)
757 { /* UDP frame */
758 pszProtShort = "PN-RTCUDP,";
759 pszProtAddInfo = "RT_CLASS_UDP, ";
760 pszProtComment = "0xF800-0xFBFF:: Real-Time(UDP multicast): Cyclic";
761 }
762 else
763 { /* layer 2 frame */
764 pszProtShort = "PN-RT";
765 pszProtAddInfo = "RTC1(legacy), ";
766 pszProtComment = "0xF800-0xFBFF: Real-Time(class=1 multicast): Cyclic";
767 }
768 pszProtSummary = "cyclic Real-Time";
769 bCyclic = true;
770 } else if (u16FrameID <= 0xFDFF) {
771 pszProtShort = "PN-RTA";
772 pszProtAddInfo = "Reserved, ";
773 pszProtSummary = "acyclic Real-Time";
774 pszProtComment = "0xFC00-0xFDFF: Reserved";
775 bCyclic = false;
776 if (u16FrameID == 0xfc01) {
777 pszProtShort = "PN-RTA";
778 pszProtAddInfo = "Alarm High, ";
779 pszProtSummary = "acyclic Real-Time";
780 pszProtComment = "Real-Time: Acyclic PN-IO Alarm high priority";
781 }
782
783 } else if (u16FrameID <= 0xFEFF) {
784 pszProtShort = "PN-RTA";
785 pszProtAddInfo = "Reserved, ";
786 pszProtSummary = "acyclic Real-Time";
787 pszProtComment = "0xFE00-0xFEFF: Real-Time: Reserved";
788 bCyclic = false;
789 if (u16FrameID == 0xFE01) {
790 pszProtShort = "PN-RTA";
791 pszProtAddInfo = "Alarm Low, ";
792 pszProtSummary = "acyclic Real-Time";
793 pszProtComment = "Real-Time: Acyclic PN-IO Alarm low priority";
794 }
795 if (u16FrameID == 0xFE02) {
796 pszProtShort = "PN-RSI";
797 pszProtAddInfo = "";
798 pszProtSummary = "acyclic Real-Time";
799 pszProtComment = "Real-Time: Acyclic PN-IO RSI";
800 }
801 if (u16FrameID == FRAME_ID_DCP_HELLO) {
802 pszProtShort = "PN-RTA";
803 pszProtAddInfo = "";
804 pszProtSummary = "acyclic Real-Time";
805 pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) hello";
806 }
807 if (u16FrameID == FRAME_ID_DCP_GETORSET) {
808 pszProtShort = "PN-RTA";
809 pszProtAddInfo = "";
810 pszProtSummary = "acyclic Real-Time";
811 pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) get/set";
812 }
813 if (u16FrameID == FRAME_ID_DCP_IDENT_REQ) {
814 pszProtShort = "PN-RTA";
815 pszProtAddInfo = "";
816 pszProtSummary = "acyclic Real-Time";
817 pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify multicast request";
818 }
819 if (u16FrameID == FRAME_ID_DCP_IDENT_RES) {
820 pszProtShort = "PN-RTA";
821 pszProtAddInfo = "";
822 pszProtSummary = "acyclic Real-Time";
823 pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify response";
824 }
825 } else if (u16FrameID <= 0xFF01) {
826 pszProtShort = "PN-PTCP";
827 pszProtAddInfo = "RTA Sync, ";
828 pszProtSummary = "acyclic Real-Time";
829 pszProtComment = "0xFF00-0xFF01: PTCP Announce";
830 bCyclic = false;
831 } else if (u16FrameID <= 0xFF1F) {
832 pszProtShort = "PN-PTCP";
833 pszProtAddInfo = "RTA Sync, ";
834 pszProtSummary = "acyclic Real-Time";
835 pszProtComment = "0xFF02-0xFF1F: Reserved";
836 bCyclic = false;
837 } else if (u16FrameID <= 0xFF21) {
838 pszProtShort = "PN-PTCP";
839 pszProtAddInfo = "Follow Up, ";
840 pszProtSummary = "acyclic Real-Time";
841 pszProtComment = "0xFF20-0xFF21: PTCP Follow Up";
842 bCyclic = false;
843 } else if (u16FrameID <= 0xFF22) {
844 pszProtShort = "PN-PTCP";
845 pszProtAddInfo = "Follow Up, ";
846 pszProtSummary = "acyclic Real-Time";
847 pszProtComment = "0xFF22-0xFF3F: Reserved";
848 bCyclic = false;
849 } else if (u16FrameID <= 0xFF43) {
850 pszProtShort = "PN-PTCP";
851 pszProtAddInfo = "Delay, ";
852 pszProtSummary = "acyclic Real-Time";
853 pszProtComment = "0xFF40-0xFF43: Acyclic Real-Time: Delay";
854 bCyclic = false;
855 } else if (u16FrameID <= 0xFF7F) {
856 pszProtShort = "PN-RT";
857 pszProtAddInfo = "Reserved, ";
858 pszProtSummary = "Real-Time";
859 pszProtComment = "0xFF44-0xFF7F: reserved ID";
860 bCyclic = false;
861 } else if (u16FrameID <= 0xFF8F) {
862 pszProtShort = "PN-RT";
863 pszProtAddInfo = "";
864 pszProtSummary = "Fragmentation";
865 pszProtComment = "0xFF80-0xFF8F: Fragmentation";
866 bCyclic = false;
867 } else {
868 pszProtShort = "PN-RT";
869 pszProtAddInfo = "Reserved, ";
870 pszProtSummary = "Real-Time";
871 pszProtComment = "0xFF90-0xFFFF: reserved ID";
872 bCyclic = false;
873 }
874
875 /* decode optional cyclic fields at the packet end and build the summary line */
876 if (bCyclic) {
877 /* cyclic transfer has cycle counter, data status and transfer status fields at the end */
878 u16CycleCounter = tvb_get_ntohs(tvb, pdu_len - 4);
879 u8DataStatus = tvb_get_uint8(tvb, pdu_len - 2);
880 u8TransferStatus = tvb_get_uint8(tvb, pdu_len - 1);
881
882 snprintf (szFieldSummary, sizeof(szFieldSummary),
883 "%sID:0x%04x, Len:%4u, Cycle:%5u (%s,%s,%s,%s)",
884 pszProtAddInfo, u16FrameID, pdu_len - 2 - 4, u16CycleCounter,
885 (u8DataStatus & 0x04) ? "Valid" : "Invalid",
886 (u8DataStatus & 0x01) ? "Primary" : "Backup",
887 (u8DataStatus & 0x20) ? "Ok" : "Problem",
888 (u8DataStatus & 0x10) ? "Run" : "Stop");
889
890 /* user data length is packet len - frame id - optional cyclic status fields */
891 data_len = pdu_len - 2 - 4;
892 } else {
893 /* satisfy the gcc compiler, so it won't throw an "uninitialized" warning */
894 u16CycleCounter = 0;
895 u8DataStatus = 0;
896 u8TransferStatus = 0;
897
898 /* acyclic transfer has no fields at the end */
899 snprintf (szFieldSummary, sizeof(szFieldSummary),
900 "%sID:0x%04x, Len:%4u",
901 pszProtAddInfo, u16FrameID, pdu_len - 2);
902
903 /* user data length is packet len - frame id field */
904 data_len = pdu_len - 2;
905 }
906
907 /* build protocol tree only, if tree is really used */
908 if (tree) {
909 /* build pn_rt protocol tree with summary line */
910 if (pn_rt_summary_in_tree) {
911 ti = proto_tree_add_protocol_format(tree, proto_pn_rt, tvb, 0, pdu_len,
912 "PROFINET %s, %s", pszProtSummary, szFieldSummary);
913 } else {
914 ti = proto_tree_add_item(tree, proto_pn_rt, tvb, 0, pdu_len, ENC_NA);
915 }
916 pn_rt_tree = proto_item_add_subtree(ti, ett_pn_rt);
917
918 /* add frame ID */
919 proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_frame_id, tvb,
920 0, 2, u16FrameID, "FrameID: 0x%04x (%s)", u16FrameID, pszProtComment);
921
922 if (bCyclic) {
923 /* add cycle counter */
924 proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_cycle_counter, tvb,
925 pdu_len - 4, 2, u16CycleCounter, "CycleCounter: %u", u16CycleCounter);
926
927 /* add data status subtree */
928 dissect_DataStatus(tvb, pdu_len - 2, pn_rt_tree, pinfo, u8DataStatus);
929
930 /* add transfer status */
931 if (u8TransferStatus) {
932 proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb,
933 pdu_len - 1, 1, u8TransferStatus,
934 "TransferStatus: 0x%02x (ignore this frame)", u8TransferStatus);
935 } else {
936 proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb,
937 pdu_len - 1, 1, u8TransferStatus,
938 "TransferStatus: 0x%02x (OK)", u8TransferStatus);
939 }
940 }
941 }
942
943 /* update column info now */
944 if (u16FrameID == 0xFE02)
945 {
946 snprintf(szFieldSummary, sizeof(szFieldSummary), "%s", "");
947 }
948 col_add_str(pinfo->cinfo, COL_INFO, szFieldSummary);
949 col_set_str(pinfo->cinfo, COL_PROTOCOL, pszProtShort);
950
951 /* get frame user data tvb (without header and footer) */
952 next_tvb = tvb_new_subset_length(tvb, 2, data_len);
953
954 /* ask heuristics, if some sub-dissector is interested in this packet payload */
955 if (!dissector_try_heuristic(heur_subdissector_list, next_tvb, pinfo, tree, &hdtbl_entry, GUINT_TO_POINTER( (uint32_t) u16FrameID))) {
956 /*col_set_str(pinfo->cinfo, COL_INFO, "Unknown");*/
957
958 /* Oh, well, we don't know this; dissect it as data. */
959 dissect_pn_undecoded(next_tvb, 0, pinfo, tree, tvb_captured_length(next_tvb));
960 }
961 return tvb_captured_length(tvb);
962 }
963
964
965 /* Register all the bits needed by the filtering engine */
966 void
967 proto_register_pn_rt(void)
968 {
969 static hf_register_info hf[] = {
970 { &hf_pn_rt_frame_id,
971 { "FrameID", "pn_rt.frame_id",
972 FT_UINT16, BASE_DEC, NULL, 0x0,
973 NULL, HFILL }},
974
975 { &hf_pn_rt_cycle_counter,
976 { "CycleCounter", "pn_rt.cycle_counter",
977 FT_UINT16, BASE_DEC, NULL, 0x0,
978 NULL, HFILL }},
979
980 { &hf_pn_rt_data_status,
981 { "DataStatus", "pn_rt.ds",
982 FT_UINT8, BASE_HEX, 0, 0x0,
983 NULL, HFILL }},
984
985 { &hf_pn_rt_data_status_ignore,
986 { "Ignore (1:Ignore/0:Evaluate)", "pn_rt.ds_ignore", FT_UINT8, BASE_HEX, 0, 0x80,
987 NULL, HFILL }},
988
989 { &hf_pn_rt_frame_info_type,
990 { "PN Frame Type", "pn_rt.ds_frame_info_type", FT_STRING, BASE_NONE, NULL, 0x0,
991 NULL, HFILL }},
992
993 { &hf_pn_rt_frame_info_function_meaning_input_conv,
994 { "Function/Meaning", "pn_rt.ds_frame_info_meaning",
995 FT_UINT8, BASE_HEX, VALS(pn_rt_frame_info_function_meaning_input_conv), 0x7,
996 NULL, HFILL } },
997
998 { &hf_pn_rt_frame_info_function_meaning_output_conv,
999 { "Function/Meaning", "pn_rt.ds_frame_info_meaning",
1000 FT_UINT8, BASE_HEX, VALS(pn_rt_frame_info_function_meaning_output_conv), 0x7,
1001 NULL, HFILL } },
1002
1003 { &hf_pn_rt_data_status_Reserved_2,
1004 { "Reserved_2 (should be zero)", "pn_rt.ds_Reserved_2",
1005 FT_UINT8, BASE_HEX, 0, 0x40,
1006 NULL, HFILL }},
1007
1008 { &hf_pn_rt_data_status_ok,
1009 { "StationProblemIndicator (1:Ok/0:Problem)", "pn_rt.ds_ok",
1010 FT_UINT8, BASE_HEX, 0, 0x20,
1011 NULL, HFILL }},
1012
1013 { &hf_pn_rt_data_status_operate,
1014 { "ProviderState (1:Run/0:Stop)", "pn_rt.ds_operate",
1015 FT_UINT8, BASE_HEX, 0, 0x10,
1016 NULL, HFILL }},
1017
1018 { &hf_pn_rt_data_status_res3,
1019 { "Reserved_3 (should be zero)", "pn_rt.ds_res3",
1020 FT_UINT8, BASE_HEX, 0, 0x08,
1021 NULL, HFILL }},
1022
1023 { &hf_pn_rt_data_status_valid,
1024 { "DataValid (1:Valid/0:Invalid)", "pn_rt.ds_valid",
1025 FT_UINT8, BASE_HEX, 0, 0x04,
1026 NULL, HFILL }},
1027
1028 { &hf_pn_rt_data_status_redundancy,
1029 { "Redundancy", "pn_rt.ds_redundancy",
1030 FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy), 0x02,
1031 NULL, HFILL }},
1032
1033 { &hf_pn_rt_data_status_redundancy_output_cr,
1034 { "Redundancy", "pn_rt.ds_redundancy",
1035 FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy_output_cr), 0x02,
1036 NULL, HFILL }},
1037
1038 { &hf_pn_rt_data_status_redundancy_input_cr_state_is_backup,
1039 { "Redundancy", "pn_rt.ds_redundancy",
1040 FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy_input_cr_state_is_backup), 0x02,
1041 NULL, HFILL }},
1042
1043 { &hf_pn_rt_data_status_redundancy_input_cr_state_is_primary,
1044 { "Redundancy", "pn_rt.ds_redundancy",
1045 FT_BOOLEAN, 8, TFS(&tfs_pn_rt_ds_redundancy_input_cr_state_is_primary), 0x02,
1046 NULL, HFILL }},
1047
1048 { &hf_pn_rt_data_status_primary,
1049 { "State (1:Primary/0:Backup)", "pn_rt.ds_primary",
1050 FT_UINT8, BASE_HEX, 0, 0x01,
1051 NULL, HFILL }},
1052
1053 { &hf_pn_rt_transfer_status,
1054 { "TransferStatus", "pn_rt.transfer_status",
1055 FT_UINT8, BASE_DEC, NULL, 0x0,
1056 NULL, HFILL }},
1057
1058 { &hf_pn_rt_sf,
1059 { "SubFrame", "pn_rt.sf",
1060 FT_NONE, BASE_NONE, NULL, 0x0,
1061 NULL, HFILL }},
1062
1063 { &hf_pn_rt_sf_crc16,
1064 { "SFCRC16", "pn_rt.sf.crc16",
1065 FT_UINT16, BASE_HEX, NULL, 0x0,
1066 NULL, HFILL }},
1067
1068 { &hf_pn_rt_sf_crc16_status,
1069 { "SFCRC16 status", "pn_rt.sf.crc16.status",
1070 FT_UINT8, BASE_NONE, VALS(plugin_proto_checksum_vals), 0x0,
1071 NULL, HFILL }},
1072
1073 { &hf_pn_rt_sf_position,
1074 { "Position", "pn_rt.sf.position",
1075 FT_UINT8, BASE_DEC, NULL, 0x7F,
1076 NULL, HFILL }},
1077
1078 #if 0
1079 { &hf_pn_rt_sf_position_control,
1080 { "Control", "pn_rt.sf.position_control",
1081 FT_UINT8, BASE_DEC, VALS(pn_rt_position_control), 0x80,
1082 NULL, HFILL }},
1083 #endif
1084
1085 { &hf_pn_rt_sf_data_length,
1086 { "DataLength", "pn_rt.sf.data_length",
1087 FT_UINT8, BASE_DEC, NULL, 0x0,
1088 NULL, HFILL }},
1089
1090 { &hf_pn_rt_sf_cycle_counter,
1091 { "CycleCounter", "pn_rt.sf.cycle_counter",
1092 FT_UINT8, BASE_DEC, NULL, 0x0,
1093 NULL, HFILL }},
1094
1095 { &hf_pn_rt_frag,
1096 { "PROFINET Fragment", "pn_rt.frag",
1097 FT_NONE, BASE_NONE, NULL, 0x0,
1098 NULL, HFILL }},
1099
1100 { &hf_pn_rt_frag_data_length,
1101 { "FragDataLength", "pn_rt.frag_data_length",
1102 FT_UINT8, BASE_DEC, NULL, 0x0,
1103 NULL, HFILL }},
1104
1105 { &hf_pn_rt_frag_status,
1106 { "FragStatus", "pn_rt.frag_status",
1107 FT_NONE, BASE_NONE, NULL, 0x0,
1108 NULL, HFILL }},
1109
1110 { &hf_pn_rt_frag_status_more_follows,
1111 { "MoreFollows", "pn_rt.frag_status.more_follows",
1112 FT_UINT8, BASE_HEX, VALS(pn_rt_frag_status_more_follows), 0x80,
1113 NULL, HFILL }},
1114
1115 { &hf_pn_rt_frag_status_error,
1116 { "Reserved", "pn_rt.frag_status.error",
1117 FT_UINT8, BASE_HEX, VALS(pn_rt_frag_status_error), 0x40,
1118 NULL, HFILL }},
1119
1120 { &hf_pn_rt_frag_status_fragment_number,
1121 { "FragmentNumber (zero based)", "pn_rt.frag_status.fragment_number",
1122 FT_UINT8, BASE_DEC, NULL, 0x3F,
1123 NULL, HFILL }},
1124
1125 /* Is this a string or a bunch of bytes? Should it be FT_BYTES? */
1126 { &hf_pn_rt_frag_data,
1127 { "FragData", "pn_rt.frag_data",
1128 FT_STRING, BASE_NONE, NULL, 0x0,
1129 NULL, HFILL }},
1130
1131 };
1132 static int *ett[] = {
1133 &ett_pn_rt,
1134 &ett_pn_rt_data_status,
1135 &ett_pn_rt_sf,
1136 &ett_pn_rt_frag,
1137 &ett_pn_rt_frag_status
1138 };
1139
1140 static ei_register_info ei[] = {
1141 { &ei_pn_rt_sf_crc16, { "pn_rt.sf.crc16_bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }},
1142 };
1143
1144 module_t *pn_rt_module;
1145 expert_module_t* expert_pn_rt;
1146
1147 proto_pn_rt = proto_register_protocol("PROFINET Real-Time Protocol",
1148 "PN-RT", "pn_rt");
1149 pn_rt_handle = register_dissector("pn_rt", dissect_pn_rt, proto_pn_rt);
1150
1151 proto_register_field_array(proto_pn_rt, hf, array_length(hf));
1152 proto_register_subtree_array(ett, array_length(ett));
1153 expert_pn_rt = expert_register_protocol(proto_pn_rt);
1154 expert_register_field_array(expert_pn_rt, ei, array_length(ei));
1155
1156 /* Register our configuration options */
1157
1158 pn_rt_module = prefs_register_protocol(proto_pn_rt, NULL);
1159
1160 prefs_register_bool_preference(pn_rt_module, "summary_in_tree",
1161 "Show PN-RT summary in protocol tree",
1162 "Whether the PN-RT summary line should be shown in the protocol tree",
1163 &pn_rt_summary_in_tree);
1164
1165 prefs_register_bool_preference(pn_rt_module, "desegment",
1166 "reassemble PNIO Fragments",
1167 "Reassemble PNIO Fragments and get them decoded",
1168 &pnio_desegment);
1169
1170 /* register heuristics anchor for payload dissectors */
1171 heur_subdissector_list = register_heur_dissector_list_with_description("pn_rt", "PROFINET RT payload", proto_pn_rt);
1172
1173 init_pn (proto_pn_rt);
1174 register_init_routine(pnio_defragment_init);
1175 register_cleanup_routine(pnio_defragment_cleanup);
1176 reassembly_table_register(&pdu_reassembly_table,
1177 &addresses_reassembly_table_functions);
1178 }
1179
1180
1181 /* The registration hand-off routine is called at startup */
1182 void
1183 proto_reg_handoff_pn_rt(void)
1184 {
1185 dissector_add_uint("ethertype", ETHERTYPE_PROFINET, pn_rt_handle);
1186 dissector_add_uint_with_preference("udp.port", PROFINET_UDP_PORT, pn_rt_handle);
1187
1188 heur_dissector_add("pn_rt", dissect_CSF_SDU_heur, "PROFINET CSF_SDU IO", "pn_csf_sdu_pn_rt", proto_pn_rt, HEURISTIC_ENABLE);
1189 heur_dissector_add("pn_rt", dissect_FRAG_PDU_heur, "PROFINET Frag PDU IO", "pn_frag_pn_rt", proto_pn_rt, HEURISTIC_ENABLE);
1190
1191 ethertype_subdissector_table = find_dissector_table("ethertype");
1192 }
1193
1194
1195 /*
1196 * Editor modelines - https://www.wireshark.org/tools/modelines.html
1197 *
1198 * Local variables:
1199 * c-basic-offset: 4
1200 * tab-width: 8
1201 * indent-tabs-mode: nil
1202 * End:
1203 *
1204 * vi: set shiftwidth=4 tabstop=8 expandtab:
1205 * :indentSize=4:tabSize=8:noTabs=true:
1206 */
Metzes wireshark repo