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[tcpdump] / print-802_15_4.c
1 /*
2 * Copyright (c) 2009
3 * Siemens AG, All rights reserved.
4 * Dmitry Eremin-Solenikov (dbaryshkov@gmail.com)
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that: (1) source code distributions
8 * retain the above copyright notice and this paragraph in its entirety, (2)
9 * distributions including binary code include the above copyright notice and
10 * this paragraph in its entirety in the documentation or other materials
11 * provided with the distribution, and (3) all advertising materials mentioning
12 * features or use of this software display the following acknowledgement:
13 * ``This product includes software developed by the University of California,
14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
15 * the University nor the names of its contributors may be used to endorse
16 * or promote products derived from this software without specific prior
17 * written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 */
22
23 /* \summary: IEEE 802.15.4 printer */
24
25 #ifdef HAVE_CONFIG_H
26 #include <config.h>
27 #endif
28
29 #include "netdissect-stdinc.h"
30
31 #include "netdissect.h"
32 #include "addrtoname.h"
33
34 #include "extract.h"
35
36 #define CHECK_BIT(num,bit) (((num) >> (bit)) & 0x1)
37
38 #define BROKEN_6TISCH_PAN_ID_COMPRESSION 0
39
40 /* Frame types from Table 7-1 of 802.15.4-2015 */
41 static const char *ftypes[] = {
42 "Beacon", /* 0 */
43 "Data", /* 1 */
44 "ACK", /* 2 */
45 "Command", /* 3 */
46 "Reserved", /* 4 */
47 "Multipurpose", /* 5 */
48 "Fragment", /* 6 */
49 "Extended" /* 7 */
50 };
51
52 /* Element IDs for Header IEs from Table 7-7 of 802.15.4-2015 */
53 static const char *h_ie_names[] = {
54 "Vendor Specific Header IE", /* 0x00 */
55 "Reserved 0x01", /* 0x01 */
56 "Reserved 0x02", /* 0x02 */
57 "Reserved 0x03", /* 0x03 */
58 "Reserved 0x04", /* 0x04 */
59 "Reserved 0x05", /* 0x05 */
60 "Reserved 0x06", /* 0x06 */
61 "Reserved 0x07", /* 0x07 */
62 "Reserved 0x08", /* 0x08 */
63 "Reserved 0x09", /* 0x09 */
64 "Reserved 0x0a", /* 0x0a */
65 "Reserved 0x0b", /* 0x0b */
66 "Reserved 0x0c", /* 0x0c */
67 "Reserved 0x0d", /* 0x0d */
68 "Reserved 0x0e", /* 0x0e */
69 "Reserved 0x0f", /* 0x0f */
70 "Reserved 0x10", /* 0x10 */
71 "Reserved 0x11", /* 0x11 */
72 "Reserved 0x12", /* 0x12 */
73 "Reserved 0x13", /* 0x13 */
74 "Reserved 0x14", /* 0x14 */
75 "Reserved 0x15", /* 0x15 */
76 "Reserved 0x16", /* 0x16 */
77 "Reserved 0x17", /* 0x17 */
78 "Reserved 0x18", /* 0x18 */
79 "Reserved 0x19", /* 0x19 */
80 "LE CSL IE", /* 0x1a */
81 "LE RIT IE", /* 0x1b */
82 "DSME PAN descriptor IE", /* 0x1c */
83 "Rendezvous Time IE", /* 0x1d */
84 "Time Correction IE", /* 0x1e */
85 "Reserved 0x1f", /* 0x1f */
86 "Reserved 0x20", /* 0x20 */
87 "Extended DSME PAN descriptor IE", /* 0x21 */
88 "Fragment Sequence Context Description IE", /* 0x22 */
89 "Simplified Superframe Specification IE", /* 0x23 */
90 "Simplified GTS Specification IE", /* 0x24 */
91 "LECIM Capabilities IE", /* 0x25 */
92 "TRLE Descriptor IE", /* 0x26 */
93 "RCC Capabilities IE", /* 0x27 */
94 "RCCN Descriptor IE", /* 0x28 */
95 "Global Time IE", /* 0x29 */
96 "Omnibus Header IE", /* 0x2a */
97 "DA IE", /* 0x2b */
98 "Reserved 0x2c", /* 0x2c */
99 "Reserved 0x2d", /* 0x2d */
100 "Reserved 0x2e", /* 0x2e */
101 "Reserved 0x2f", /* 0x2f */
102 "Reserved 0x30", /* 0x30 */
103 "Reserved 0x31", /* 0x31 */
104 "Reserved 0x32", /* 0x32 */
105 "Reserved 0x33", /* 0x33 */
106 "Reserved 0x34", /* 0x34 */
107 "Reserved 0x35", /* 0x35 */
108 "Reserved 0x36", /* 0x36 */
109 "Reserved 0x37", /* 0x37 */
110 "Reserved 0x38", /* 0x38 */
111 "Reserved 0x39", /* 0x39 */
112 "Reserved 0x3a", /* 0x3a */
113 "Reserved 0x3b", /* 0x3b */
114 "Reserved 0x3c", /* 0x3c */
115 "Reserved 0x3d", /* 0x3d */
116 "Reserved 0x3e", /* 0x3e */
117 "Reserved 0x3f", /* 0x3f */
118 "Reserved 0x40", /* 0x40 */
119 "Reserved 0x41", /* 0x41 */
120 "Reserved 0x42", /* 0x42 */
121 "Reserved 0x43", /* 0x43 */
122 "Reserved 0x44", /* 0x44 */
123 "Reserved 0x45", /* 0x45 */
124 "Reserved 0x46", /* 0x46 */
125 "Reserved 0x47", /* 0x47 */
126 "Reserved 0x48", /* 0x48 */
127 "Reserved 0x49", /* 0x49 */
128 "Reserved 0x4a", /* 0x4a */
129 "Reserved 0x4b", /* 0x4b */
130 "Reserved 0x4c", /* 0x4c */
131 "Reserved 0x4d", /* 0x4d */
132 "Reserved 0x4e", /* 0x4e */
133 "Reserved 0x4f", /* 0x4f */
134 "Reserved 0x50", /* 0x50 */
135 "Reserved 0x51", /* 0x51 */
136 "Reserved 0x52", /* 0x52 */
137 "Reserved 0x53", /* 0x53 */
138 "Reserved 0x54", /* 0x54 */
139 "Reserved 0x55", /* 0x55 */
140 "Reserved 0x56", /* 0x56 */
141 "Reserved 0x57", /* 0x57 */
142 "Reserved 0x58", /* 0x58 */
143 "Reserved 0x59", /* 0x59 */
144 "Reserved 0x5a", /* 0x5a */
145 "Reserved 0x5b", /* 0x5b */
146 "Reserved 0x5c", /* 0x5c */
147 "Reserved 0x5d", /* 0x5d */
148 "Reserved 0x5e", /* 0x5e */
149 "Reserved 0x5f", /* 0x5f */
150 "Reserved 0x60", /* 0x60 */
151 "Reserved 0x61", /* 0x61 */
152 "Reserved 0x62", /* 0x62 */
153 "Reserved 0x63", /* 0x63 */
154 "Reserved 0x64", /* 0x64 */
155 "Reserved 0x65", /* 0x65 */
156 "Reserved 0x66", /* 0x66 */
157 "Reserved 0x67", /* 0x67 */
158 "Reserved 0x68", /* 0x68 */
159 "Reserved 0x69", /* 0x69 */
160 "Reserved 0x6a", /* 0x6a */
161 "Reserved 0x6b", /* 0x6b */
162 "Reserved 0x6c", /* 0x6c */
163 "Reserved 0x6d", /* 0x6d */
164 "Reserved 0x6e", /* 0x6e */
165 "Reserved 0x6f", /* 0x6f */
166 "Reserved 0x70", /* 0x70 */
167 "Reserved 0x71", /* 0x71 */
168 "Reserved 0x72", /* 0x72 */
169 "Reserved 0x73", /* 0x73 */
170 "Reserved 0x74", /* 0x74 */
171 "Reserved 0x75", /* 0x75 */
172 "Reserved 0x76", /* 0x76 */
173 "Reserved 0x77", /* 0x77 */
174 "Reserved 0x78", /* 0x78 */
175 "Reserved 0x79", /* 0x79 */
176 "Reserved 0x7a", /* 0x7a */
177 "Reserved 0x7b", /* 0x7b */
178 "Reserved 0x7c", /* 0x7c */
179 "Reserved 0x7d", /* 0x7d */
180 "Header Termination 1 IE", /* 0x7e */
181 "Header Termination 2 IE" /* 0x7f */
182 };
183
184 /* Payload IE Group IDs from Table 7-15 of 802.15.4-2015 */
185 static const char *p_ie_names[] = {
186 "ESDU IE", /* 0x00 */
187 "MLME IE", /* 0x01 */
188 "Vendor Specific Nested IE", /* 0x02 */
189 "Multiplexed IE (802.15.9)", /* 0x03 */
190 "Omnibus Payload Group IE", /* 0x04 */
191 "IETF IE", /* 0x05 */
192 "Reserved 0x06", /* 0x06 */
193 "Reserved 0x07", /* 0x07 */
194 "Reserved 0x08", /* 0x08 */
195 "Reserved 0x09", /* 0x09 */
196 "Reserved 0x0a", /* 0x0a */
197 "Reserved 0x0b", /* 0x0b */
198 "Reserved 0x0c", /* 0x0c */
199 "Reserved 0x0d", /* 0x0d */
200 "Reserved 0x0e", /* 0x0e */
201 "List termination" /* 0x0f */
202 };
203
204 /* Sub-ID for short format from Table 7-16 of 802.15.4-2015 */
205 static const char *p_mlme_short_names[] = {
206 "Reserved for long format 0x0", /* 0x00 */
207 "Reserved for long format 0x1", /* 0x01 */
208 "Reserved for long format 0x2", /* 0x02 */
209 "Reserved for long format 0x3", /* 0x03 */
210 "Reserved for long format 0x4", /* 0x04 */
211 "Reserved for long format 0x5", /* 0x05 */
212 "Reserved for long format 0x6", /* 0x06 */
213 "Reserved for long format 0x7", /* 0x07 */
214 "Reserved for long format 0x8", /* 0x08 */
215 "Reserved for long format 0x9", /* 0x09 */
216 "Reserved for long format 0xa", /* 0x0a */
217 "Reserved for long format 0xb", /* 0x0b */
218 "Reserved for long format 0xc", /* 0x0c */
219 "Reserved for long format 0xd", /* 0x0d */
220 "Reserved for long format 0xe", /* 0x0e */
221 "Reserved for long format 0xf", /* 0x0f */
222 "Reserved 0x10", /* 0x10 */
223 "Reserved 0x11", /* 0x11 */
224 "Reserved 0x12", /* 0x12 */
225 "Reserved 0x13", /* 0x13 */
226 "Reserved 0x14", /* 0x14 */
227 "Reserved 0x15", /* 0x15 */
228 "Reserved 0x16", /* 0x16 */
229 "Reserved 0x17", /* 0x17 */
230 "Reserved 0x18", /* 0x18 */
231 "Reserved 0x19", /* 0x19 */
232 "TSCH Synchronization IE", /* 0x1a */
233 "TSCH Slotframe and Link IE", /* 0x1b */
234 "TSCH Timeslot IE", /* 0x1c */
235 "Hopping timing IE", /* 0x1d */
236 "Enhanced Beacon Filter IE", /* 0x1e */
237 "MAC Metrics IE", /* 0x1f */
238 "All MAC Metrics IE", /* 0x20 */
239 "Coexistence Specification IE", /* 0x21 */
240 "SUN Device Capabilities IE", /* 0x22 */
241 "SUN FSK Generic PHY IE", /* 0x23 */
242 "Mode Switch Parameter IE", /* 0x24 */
243 "PHY Parameter Change IE", /* 0x25 */
244 "O-QPSK PHY Mode IE", /* 0x26 */
245 "PCA Allocation IE", /* 0x27 */
246 "LECIM DSSS Operating Mode IE", /* 0x28 */
247 "LECIM FSK Operating Mode IE", /* 0x29 */
248 "Reserved 0x2a", /* 0x2a */
249 "TVWS PHY Operating Mode Description IE", /* 0x2b */
250 "TVWS Device Capabilities IE", /* 0x2c */
251 "TVWS Device Category IE", /* 0x2d */
252 "TVWS Device Identiication IE", /* 0x2e */
253 "TVWS Device Location IE", /* 0x2f */
254 "TVWS Channel Information Query IE", /* 0x30 */
255 "TVWS Channel Information Source IE", /* 0x31 */
256 "CTM IE", /* 0x32 */
257 "Timestamp IE", /* 0x33 */
258 "Timestamp Difference IE", /* 0x34 */
259 "TMCTP Sepcification IE", /* 0x35 */
260 "RCC PHY Operating Mode IE", /* 0x36 */
261 "Reserved 0x37", /* 0x37 */
262 "Reserved 0x38", /* 0x38 */
263 "Reserved 0x39", /* 0x39 */
264 "Reserved 0x3a", /* 0x3a */
265 "Reserved 0x3b", /* 0x3b */
266 "Reserved 0x3c", /* 0x3c */
267 "Reserved 0x3d", /* 0x3d */
268 "Reserved 0x3e", /* 0x3e */
269 "Reserved 0x3f", /* 0x3f */
270 "Reserved 0x40", /* 0x40 */
271 "Reserved 0x41", /* 0x41 */
272 "Reserved 0x42", /* 0x42 */
273 "Reserved 0x43", /* 0x43 */
274 "Reserved 0x44", /* 0x44 */
275 "Reserved 0x45", /* 0x45 */
276 "Reserved 0x46", /* 0x46 */
277 "Reserved 0x47", /* 0x47 */
278 "Reserved 0x48", /* 0x48 */
279 "Reserved 0x49", /* 0x49 */
280 "Reserved 0x4a", /* 0x4a */
281 "Reserved 0x4b", /* 0x4b */
282 "Reserved 0x4c", /* 0x4c */
283 "Reserved 0x4d", /* 0x4d */
284 "Reserved 0x4e", /* 0x4e */
285 "Reserved 0x4f", /* 0x4f */
286 "Reserved 0x50", /* 0x50 */
287 "Reserved 0x51", /* 0x51 */
288 "Reserved 0x52", /* 0x52 */
289 "Reserved 0x53", /* 0x53 */
290 "Reserved 0x54", /* 0x54 */
291 "Reserved 0x55", /* 0x55 */
292 "Reserved 0x56", /* 0x56 */
293 "Reserved 0x57", /* 0x57 */
294 "Reserved 0x58", /* 0x58 */
295 "Reserved 0x59", /* 0x59 */
296 "Reserved 0x5a", /* 0x5a */
297 "Reserved 0x5b", /* 0x5b */
298 "Reserved 0x5c", /* 0x5c */
299 "Reserved 0x5d", /* 0x5d */
300 "Reserved 0x5e", /* 0x5e */
301 "Reserved 0x5f", /* 0x5f */
302 "Reserved 0x60", /* 0x60 */
303 "Reserved 0x61", /* 0x61 */
304 "Reserved 0x62", /* 0x62 */
305 "Reserved 0x63", /* 0x63 */
306 "Reserved 0x64", /* 0x64 */
307 "Reserved 0x65", /* 0x65 */
308 "Reserved 0x66", /* 0x66 */
309 "Reserved 0x67", /* 0x67 */
310 "Reserved 0x68", /* 0x68 */
311 "Reserved 0x69", /* 0x69 */
312 "Reserved 0x6a", /* 0x6a */
313 "Reserved 0x6b", /* 0x6b */
314 "Reserved 0x6c", /* 0x6c */
315 "Reserved 0x6d", /* 0x6d */
316 "Reserved 0x6e", /* 0x6e */
317 "Reserved 0x6f", /* 0x6f */
318 "Reserved 0x70", /* 0x70 */
319 "Reserved 0x71", /* 0x71 */
320 "Reserved 0x72", /* 0x72 */
321 "Reserved 0x73", /* 0x73 */
322 "Reserved 0x74", /* 0x74 */
323 "Reserved 0x75", /* 0x75 */
324 "Reserved 0x76", /* 0x76 */
325 "Reserved 0x77", /* 0x77 */
326 "Reserved 0x78", /* 0x78 */
327 "Reserved 0x79", /* 0x79 */
328 "Reserved 0x7a", /* 0x7a */
329 "Reserved 0x7b", /* 0x7b */
330 "Reserved 0x7c", /* 0x7c */
331 "Reserved 0x7d", /* 0x7d */
332 "Reserved 0x7e", /* 0x7e */
333 "Reserved 0x7f" /* 0x7f */
334 };
335
336 /* Sub-ID for long format from Table 7-17 of 802.15.4-2015 */
337 static const char *p_mlme_long_names[] = {
338 "Reserved 0x00", /* 0x00 */
339 "Reserved 0x01", /* 0x01 */
340 "Reserved 0x02", /* 0x02 */
341 "Reserved 0x03", /* 0x03 */
342 "Reserved 0x04", /* 0x04 */
343 "Reserved 0x05", /* 0x05 */
344 "Reserved 0x06", /* 0x06 */
345 "Reserved 0x07", /* 0x07 */
346 "Vendor Specific MLME Nested IE", /* 0x08 */
347 "Channel Hopping IE", /* 0x09 */
348 "Reserved 0x0a", /* 0x0a */
349 "Reserved 0x0b", /* 0x0b */
350 "Reserved 0x0c", /* 0x0c */
351 "Reserved 0x0d", /* 0x0d */
352 "Reserved 0x0e", /* 0x0e */
353 "Reserved 0x0f" /* 0x0f */
354 };
355
356 /* MAC commands from Table 7-49 of 802.15.4-2015 */
357 static const char *mac_c_names[] = {
358 "Reserved 0x00", /* 0x00 */
359 "Association Request command", /* 0x01 */
360 "Association Response command", /* 0x02 */
361 "Disassociation Notification command", /* 0x03 */
362 "Data Request command", /* 0x04 */
363 "PAN ID Conflict Notification command", /* 0x05 */
364 "Orphan Notification command", /* 0x06 */
365 "Beacon Request command", /* 0x07 */
366 "Coordinator realignment command", /* 0x08 */
367 "GTS request command", /* 0x09 */
368 "TRLE Management Request command", /* 0x0a */
369 "TRLE Management Response command", /* 0x0b */
370 "Reserved 0x0c", /* 0x0c */
371 "Reserved 0x0d", /* 0x0d */
372 "Reserved 0x0e", /* 0x0e */
373 "Reserved 0x0f", /* 0x0f */
374 "Reserved 0x10", /* 0x10 */
375 "Reserved 0x11", /* 0x11 */
376 "Reserved 0x12", /* 0x12 */
377 "DSME Association Request command", /* 0x13 */
378 "DSME Association Response command", /* 0x14 */
379 "DSME GTS Request command", /* 0x15 */
380 "DSME GTS Response command", /* 0x16 */
381 "DSME GTS Notify command", /* 0x17 */
382 "DSME Information Request command", /* 0x18 */
383 "DSME Information Response command", /* 0x19 */
384 "DSME Beacon Allocation Notification command", /* 0x1a */
385 "DSME Beacon Collision Notification command", /* 0x1b */
386 "DSME Link Report command", /* 0x1c */
387 "Reserved 0x1d", /* 0x1d */
388 "Reserved 0x1e", /* 0x1e */
389 "Reserved 0x1f", /* 0x1f */
390 "RIT Data Request command", /* 0x20 */
391 "DBS Request command", /* 0x21 */
392 "DBS Response command", /* 0x22 */
393 "RIT Data Response command", /* 0x23 */
394 "Vendor Specific command", /* 0x24 */
395 "Reserved 0x25", /* 0x25 */
396 "Reserved 0x26", /* 0x26 */
397 "Reserved 0x27", /* 0x27 */
398 "Reserved 0x28", /* 0x28 */
399 "Reserved 0x29", /* 0x29 */
400 "Reserved 0x2a", /* 0x2a */
401 "Reserved 0x2b", /* 0x2b */
402 "Reserved 0x2c", /* 0x2c */
403 "Reserved 0x2d", /* 0x2d */
404 "Reserved 0x2e", /* 0x2e */
405 "Reserved 0x2f" /* 0x2f */
406 };
407
408 /*
409 * Frame Control subfields.
410 */
411 #define FC_FRAME_TYPE(fc) ((fc) & 0x7)
412 #define FC_FRAME_VERSION(fc) (((fc) >> 12) & 0x3)
413
414 #define FC_ADDRESSING_MODE_NONE 0x00
415 #define FC_ADDRESSING_MODE_RESERVED 0x01
416 #define FC_ADDRESSING_MODE_SHORT 0x02
417 #define FC_ADDRESSING_MODE_LONG 0x03
418
419 /*
420 * IEEE 802.15.4 CRC 16 function. This is using CCITT polynomical of 0x1021,
421 * but the initial value is 0, and the bits are reversed for both in and out.
422 * See secton 7.2.10 of 802.15.4-2015 for more information.
423 */
424 static uint16_t
425 ieee802_15_4_crc16(netdissect_options *ndo, const u_char *p,
426 u_int data_len)
427 {
428 uint16_t crc;
429 u_char x, y;
430
431 crc = 0x0000; /* Note, initial value is 0x0000 not 0xffff. */
432
433 while (data_len != 0){
434 y = GET_U_1(p);
435 p++;
436 /* Reverse bits on input */
437 y = (((y & 0xaa) >> 1) | ((y & 0x55) << 1));
438 y = (((y & 0xcc) >> 2) | ((y & 0x33) << 2));
439 y = (((y & 0xf0) >> 4) | ((y & 0x0f) << 4));
440 /* Update CRC */
441 x = crc >> 8 ^ y;
442 x ^= x >> 4;
443 crc = ((uint16_t)(crc << 8)) ^
444 ((uint16_t)(x << 12)) ^
445 ((uint16_t)(x << 5)) ^
446 ((uint16_t)x);
447 data_len--;
448 }
449 /* Reverse bits on output */
450 crc = (((crc & 0xaaaa) >> 1) | ((crc & 0x5555) << 1));
451 crc = (((crc & 0xcccc) >> 2) | ((crc & 0x3333) << 2));
452 crc = (((crc & 0xf0f0) >> 4) | ((crc & 0x0f0f) << 4));
453 crc = (((crc & 0xff00) >> 8) | ((crc & 0x00ff) << 8));
454 return crc;
455 }
456
457 /*
458 * Reverses the bits of the 32-bit word.
459 */
460 static uint32_t
461 ieee802_15_4_reverse32(uint32_t x)
462 {
463 x = ((x & 0x55555555) << 1) | ((x >> 1) & 0x55555555);
464 x = ((x & 0x33333333) << 2) | ((x >> 2) & 0x33333333);
465 x = ((x & 0x0F0F0F0F) << 4) | ((x >> 4) & 0x0F0F0F0F);
466 x = (x << 24) | ((x & 0xFF00) << 8) |
467 ((x >> 8) & 0xFF00) | (x >> 24);
468 return x;
469 }
470
471 /*
472 * IEEE 802.15.4 CRC 32 function. This is using ANSI X3.66-1979 polynomical of
473 * 0x04C11DB7, but the initial value is 0, and the bits are reversed for both
474 * in and out. See secton 7.2.10 of 802.15.4-2015 for more information.
475 */
476 static uint32_t
477 ieee802_15_4_crc32(netdissect_options *ndo, const u_char *p,
478 u_int data_len)
479 {
480 uint32_t crc, byte;
481 int b;
482
483 crc = 0x00000000; /* Note, initial value is 0x00000000 not 0xffffffff */
484
485 while (data_len != 0){
486 byte = GET_U_1(p);
487 p++;
488 /* Reverse bits on input */
489 byte = ieee802_15_4_reverse32(byte);
490 /* Update CRC */
491 for(b = 0; b <= 7; b++) {
492 if ((int) (crc ^ byte) < 0)
493 crc = (crc << 1) ^ 0x04C11DB7;
494 else
495 crc = crc << 1;
496 byte = byte << 1;
497 }
498 data_len--;
499 }
500 /* Reverse bits on output */
501 crc = ieee802_15_4_reverse32(crc);
502 return crc;
503 }
504
505 /*
506 * Find out the address length based on the address type. See table 7-3 of
507 * 802.15.4-2015. Returns the address length.
508 */
509 static int
510 ieee802_15_4_addr_len(uint16_t addr_type)
511 {
512 switch (addr_type) {
513 case FC_ADDRESSING_MODE_NONE: /* None. */
514 return 0;
515 break;
516 case FC_ADDRESSING_MODE_RESERVED: /* Reserved, there used to be 8-bit
517 * address type in one amendment, but
518 * that and the feature using it was
519 * removed during 802.15.4-2015
520 * maintenance process. */
521 return -1;
522 break;
523 case FC_ADDRESSING_MODE_SHORT: /* Short. */
524 return 2;
525 break;
526 case FC_ADDRESSING_MODE_LONG: /* Extended. */
527 return 8;
528 break;
529 }
530 return 0;
531 }
532
533 /*
534 * Print out the ieee 802.15.4 address.
535 */
536 static void
537 ieee802_15_4_print_addr(netdissect_options *ndo, const u_char *p,
538 int dst_addr_len)
539 {
540 switch (dst_addr_len) {
541 case 0:
542 ND_PRINT("none");
543 break;
544 case 2:
545 ND_PRINT("%04x", GET_LE_U_2(p));
546 break;
547 case 8:
548 ND_PRINT("%s", GET_LE64ADDR_STRING(p));
549 break;
550 }
551 return;
552 }
553
554 /*
555 * Beacon frame superframe specification structure. Used in the old Beacon
556 * frames, and in the DSME PAN Descriptor IE. See section 7.3.1.3 of the
557 * 802.15.4-2015.
558 */
559 static void
560 ieee802_15_4_print_superframe_specification(netdissect_options *ndo,
561 uint16_t ss)
562 {
563 if (ndo->ndo_vflag < 1) {
564 return;
565 }
566 ND_PRINT("\n\tBeacon order = %d, Superframe order = %d, ",
567 (ss & 0xf), ((ss >> 4) & 0xf));
568 ND_PRINT("Final CAP Slot = %d",
569 ((ss >> 8) & 0xf));
570 if (CHECK_BIT(ss, 12)) { ND_PRINT(", BLE enabled"); }
571 if (CHECK_BIT(ss, 14)) { ND_PRINT(", PAN Coordinator"); }
572 if (CHECK_BIT(ss, 15)) { ND_PRINT(", Assocation Permit"); }
573 }
574
575 /*
576 * Beacon frame gts info structure. Used in the old Beacon frames, and
577 * in the DSME PAN Descriptor IE. See section 7.3.1.4 of 802.15.4-2015.
578 *
579 * Returns number of byts consumed from the packet or -1 in case of error.
580 */
581 static int
582 ieee802_15_4_print_gts_info(netdissect_options *ndo,
583 const u_char *p,
584 u_int data_len)
585 {
586 uint8_t gts_spec, gts_cnt;
587 u_int len;
588 int i;
589
590 gts_spec = GET_U_1(p);
591 gts_cnt = gts_spec & 0x7;
592
593 if (gts_cnt == 0) {
594 if (ndo->ndo_vflag > 0) {
595 ND_PRINT("\n\tGTS Descriptor Count = %d, ", gts_cnt);
596 }
597 return 1;
598 }
599 len = 1 + 1 + gts_cnt * 3;
600
601 if (data_len < len) {
602 ND_PRINT(" [ERROR: Truncated GTS Info List]");
603 return -1;
604 }
605 if (ndo->ndo_vflag < 2) {
606 return len;
607 }
608 ND_PRINT("GTS Descriptor Count = %d, ", gts_cnt);
609 ND_PRINT("GTS Directions Mask = %02x, [ ",
610 GET_U_1(p + 1) & 0x7f);
611
612 for(i = 0; i < gts_cnt; i++) {
613 ND_PRINT("[ ");
614 ieee802_15_4_print_addr(ndo, p + 2 + i * 3, 2);
615 ND_PRINT(", Start slot = %d, Length = %d ] ",
616 GET_U_1(p + 2 + i * 3 + 1) & 0x0f,
617 (GET_U_1(p + 2 + i * 3 + 1) >> 4) & 0x0f);
618 }
619 ND_PRINT("]");
620 return len;
621 }
622
623 /*
624 * Beacon frame pending address structure. Used in the old Beacon frames, and
625 * in the DSME PAN Descriptor IE. See section 7.3.1.5 of 802.15.4-2015.
626 *
627 * Returns number of byts consumed from the packet or -1 in case of error.
628 */
629 static int16_t
630 ieee802_15_4_print_pending_addresses(netdissect_options *ndo,
631 const u_char *p,
632 u_int data_len)
633 {
634 uint8_t pas, s_cnt, e_cnt, len, i;
635
636 pas = GET_U_1(p);
637 s_cnt = pas & 0x7;
638 e_cnt = (pas >> 4) & 0x7;
639 len = 1 + s_cnt * 2 + e_cnt * 8;
640 if (ndo->ndo_vflag > 0) {
641 ND_PRINT("\n\tPending address list, "
642 "# short addresses = %d, # extended addresses = %d",
643 s_cnt, e_cnt);
644 }
645 if (data_len < len) {
646 ND_PRINT(" [ERROR: Pending address list truncated]");
647 return -1;
648 }
649 if (ndo->ndo_vflag < 2) {
650 return len;
651 }
652 if (s_cnt != 0) {
653 ND_PRINT(", Short address list = [ ");
654 for(i = 0; i < s_cnt; i++) {
655 ieee802_15_4_print_addr(ndo, p + 1 + i * 2, 2);
656 ND_PRINT(" ");
657 }
658 ND_PRINT("]");
659 }
660 if (e_cnt != 0) {
661 ND_PRINT(", Extended address list = [ ");
662 for(i = 0; i < e_cnt; i++) {
663 ieee802_15_4_print_addr(ndo, p + 1 + s_cnt * 2 +
664 i * 8, 8);
665 ND_PRINT(" ");
666 }
667 ND_PRINT("]");
668 }
669 return len;
670 }
671
672 /*
673 * Print header ie content.
674 */
675 static void
676 ieee802_15_4_print_header_ie(netdissect_options *ndo,
677 const u_char *p,
678 uint16_t ie_len,
679 int element_id)
680 {
681 int i;
682
683 switch (element_id) {
684 case 0x00: /* Vendor Specific Header IE */
685 if (ie_len < 3) {
686 ND_PRINT("[ERROR: Vendor OUI missing]");
687 } else {
688 ND_PRINT("OUI = 0x%02x%02x%02x, ", GET_U_1(p),
689 GET_U_1(p + 1), GET_U_1(p + 2));
690 ND_PRINT("Data = ");
691 for(i = 3; i < ie_len; i++) {
692 ND_PRINT("%02x ", GET_U_1(p + i));
693 }
694 }
695 break;
696 case 0x1a: /* LE CSL IE */
697 if (ie_len < 4) {
698 ND_PRINT("[ERROR: Truncated CSL IE]");
699 } else {
700 ND_PRINT("CSL Phase = %d, CSL Period = %d",
701 GET_LE_U_2(p), GET_LE_U_2(p + 2));
702 if (ie_len >= 6) {
703 ND_PRINT(", Rendezvous time = %d",
704 GET_LE_U_2(p + 4));
705 }
706 if (ie_len != 4 && ie_len != 6) {
707 ND_PRINT(" [ERROR: CSL IE length wrong]");
708 }
709 }
710 break;
711 case 0x1b: /* LE RIT IE */
712 if (ie_len < 4) {
713 ND_PRINT("[ERROR: Truncated RIT IE]");
714 } else {
715 ND_PRINT("Time to First Listen = %d, # of Repeat Listen = %d, Repeat Listen Interval = %d",
716 GET_U_1(p),
717 GET_U_1(p + 1),
718 GET_LE_U_2(p + 2));
719 }
720 break;
721 case 0x1c: /* DSME PAN Descriptor IE */
722 /*FALLTHROUGH*/
723 case 0x21: /* Extended DSME PAN descriptior IE */
724 if (ie_len < 2) {
725 ND_PRINT("[ERROR: Truncated DSME PAN IE]");
726 } else {
727 uint16_t ss, ptr, ulen;
728 int16_t len;
729 int hopping_present;
730
731 hopping_present = 0;
732
733 ss = GET_LE_U_2(p);
734 ieee802_15_4_print_superframe_specification(ndo, ss);
735 if (ie_len < 3) {
736 ND_PRINT("[ERROR: Truncated before pending addresses field]");
737 break;
738 }
739 ptr = 2;
740 len = ieee802_15_4_print_pending_addresses(ndo,
741 p + ptr,
742 ie_len -
743 ptr);
744 if (len < 0) {
745 break;
746 }
747 ptr += len;
748
749 if (element_id == 0x21) {
750 /* Extended version. */
751 if (ie_len < ptr + 2) {
752 ND_PRINT("[ERROR: Truncated before DSME Superframe Specification]");
753 break;
754 }
755 ss = GET_LE_U_2(p + ptr);
756 ptr += 2;
757 ND_PRINT("Multi-superframe Order = %d", ss & 0xff);
758 ND_PRINT(", %s", ((ss & 0x100) ?
759 "Channel hopping mode" :
760 "Channel adaptation mode"));
761 if (ss & 0x400) {
762 ND_PRINT(", CAP reduction enabled");
763 }
764 if (ss & 0x800) {
765 ND_PRINT(", Deferred beacon enabled");
766 }
767 if (ss & 0x1000) {
768 ND_PRINT(", Hopping Sequence Present");
769 hopping_present = 1;
770 }
771 } else {
772 if (ie_len < ptr + 1) {
773 ND_PRINT("[ERROR: Truncated before DSME Superframe Specification]");
774 break;
775 }
776 ss = GET_U_1(p + ptr);
777 ptr++;
778 ND_PRINT("Multi-superframe Order = %d",
779 ss & 0x0f);
780 ND_PRINT(", %s", ((ss & 0x10) ?
781 "Channel hopping mode" :
782 "Channel adaptation mode"));
783 if (ss & 0x40) {
784 ND_PRINT(", CAP reduction enabled");
785 }
786 if (ss & 0x80) {
787 ND_PRINT(", Deferred beacon enabled");
788 }
789 }
790 if (ie_len < ptr + 8) {
791 ND_PRINT(" [ERROR: Truncated before Time syncronization specification]");
792 break;
793 }
794 ND_PRINT("Beacon timestamp = %" PRIu64 ", offset = %d",
795 GET_LE_U_6(p + ptr),
796 GET_LE_U_2(p + ptr + 6));
797 ptr += 8;
798 if (ie_len < ptr + 4) {
799 ND_PRINT(" [ERROR: Truncated before Beacon Bitmap]");
800 break;
801 }
802
803 ulen = GET_LE_U_2(p + ptr + 2);
804 ND_PRINT("SD Index = %d, Bitmap len = %d, ",
805 GET_LE_U_2(p + ptr), ulen);
806 ptr += 4;
807 if (ie_len < ptr + ulen) {
808 ND_PRINT(" [ERROR: Truncated in SD bitmap]");
809 break;
810 }
811 ND_PRINT(" SD Bitmap = ");
812 for(i = 0; i < ulen; i++) {
813 ND_PRINT("%02x ", GET_U_1(p + ptr + i));
814 }
815 ptr += ulen;
816
817 if (ie_len < ptr + 5) {
818 ND_PRINT(" [ERROR: Truncated before Channel hopping specification]");
819 break;
820 }
821
822 ulen = GET_LE_U_2(p + ptr + 4);
823 ND_PRINT("Hopping Seq ID = %d, PAN Coordinator BSN = %d, "
824 "Channel offset = %d, Bitmap length = %d, ",
825 GET_U_1(p + ptr),
826 GET_U_1(p + ptr + 1),
827 GET_LE_U_2(p + ptr + 2),
828 ulen);
829 ptr += 5;
830 if (ie_len < ptr + ulen) {
831 ND_PRINT(" [ERROR: Truncated in Channel offset bitmap]");
832 break;
833 }
834 ND_PRINT(" Channel offset bitmap = ");
835 for(i = 0; i < ulen; i++) {
836 ND_PRINT("%02x ", GET_U_1(p + ptr + i));
837 }
838 ptr += ulen;
839 if (hopping_present) {
840 if (ie_len < ptr + 1) {
841 ND_PRINT(" [ERROR: Truncated in Hopping Sequence length]");
842 break;
843 }
844 ulen = GET_U_1(p + ptr);
845 ptr++;
846 ND_PRINT("Hopping Seq length = %d [ ", ulen);
847
848 /* The specification is not clear how the
849 hopping sequence is encoded, I assume two
850 octet unsigned integers for each channel. */
851
852 if (ie_len < ptr + ulen * 2) {
853 ND_PRINT(" [ERROR: Truncated in Channel offset bitmap]");
854 break;
855 }
856 for(i = 0; i < ulen; i++) {
857 ND_PRINT("%02x ",
858 GET_LE_U_2(p + ptr + i * 2));
859 }
860 ND_PRINT("]");
861 ptr += ulen * 2;
862 }
863 }
864 break;
865 case 0x1d: /* Rendezvous Tome IE */
866 if (ie_len != 4) {
867 ND_PRINT("[ERROR: Length != 2]");
868 } else {
869 uint16_t r_time, w_u_interval;
870 r_time = GET_LE_U_2(p);
871 w_u_interval = GET_LE_U_2(p + 2);
872
873 ND_PRINT("Rendezvous time = %d, Wake-up Interval = %d",
874 r_time, w_u_interval);
875 }
876 break;
877 case 0x1e: /* Time correction IE */
878 if (ie_len != 2) {
879 ND_PRINT("[ERROR: Length != 2]");
880 } else {
881 uint16_t val;
882 int16_t timecorr;
883
884 val = GET_LE_U_2(p);
885 if (val & 0x8000) { ND_PRINT("Negative "); }
886 val &= 0xfff;
887 val <<= 4;
888 timecorr = val;
889 timecorr >>= 4;
890
891 ND_PRINT("Ack time correction = %d, ", timecorr);
892 }
893 break;
894 case 0x22: /* Frament Sequence Content Description IE */
895 /* XXX Not implemented */
896 case 0x23: /* Simplified Superframe Specification IE */
897 /* XXX Not implemented */
898 case 0x24: /* Simplified GTS Specification IE */
899 /* XXX Not implemented */
900 case 0x25: /* LECIM Capabilities IE */
901 /* XXX Not implemented */
902 case 0x26: /* TRLE Descriptor IE */
903 /* XXX Not implemented */
904 case 0x27: /* RCC Capabilities IE */
905 /* XXX Not implemented */
906 case 0x28: /* RCCN Descriptor IE */
907 /* XXX Not implemented */
908 case 0x29: /* Global Time IE */
909 /* XXX Not implemented */
910 case 0x2b: /* DA IE */
911 /* XXX Not implemented */
912 default:
913 ND_PRINT("IE Data = ");
914 for(i = 0; i < ie_len; i++) {
915 ND_PRINT("%02x ", GET_U_1(p + i));
916 }
917 break;
918 }
919 }
920
921 /*
922 * Parse and print Header IE list. See 7.4.2 of 802.15.4-2015 for
923 * more information.
924 *
925 * Returns number of byts consumed from the packet or -1 in case of error.
926 */
927 static int
928 ieee802_15_4_print_header_ie_list(netdissect_options *ndo,
929 const u_char *p,
930 u_int caplen,
931 int *payload_ie_present)
932 {
933 int len, ie, element_id, i;
934 uint16_t ie_len;
935
936 *payload_ie_present = 0;
937 len = 0;
938 do {
939 if (caplen < 2) {
940 ND_PRINT("[ERROR: Truncated header IE]");
941 return -1;
942 }
943 /* Extract IE Header */
944 ie = GET_LE_U_2(p);
945 if (CHECK_BIT(ie, 15)) {
946 ND_PRINT("[ERROR: Header IE with type 1] ");
947 }
948 /* Get length and Element ID */
949 ie_len = ie & 0x7f;
950 element_id = (ie >> 7) & 0xff;
951 if (element_id > 127) {
952 ND_PRINT("Reserved Element ID %02x, length = %d ",
953 element_id, ie_len);
954 } else {
955 if (ie_len == 0) {
956 ND_PRINT("\n\t%s [", h_ie_names[element_id]);
957 } else {
958 ND_PRINT("\n\t%s [ length = %d, ",
959 h_ie_names[element_id], ie_len);
960 }
961 }
962 if (caplen < ie_len) {
963 ND_PRINT("[ERROR: Truncated IE data]");
964 return -1;
965 }
966 /* Skip header */
967 p += 2;
968
969 /* Parse and print content. */
970 if (ndo->ndo_vflag > 3 && ie_len != 0) {
971 ieee802_15_4_print_header_ie(ndo, p,
972 ie_len, element_id);
973 } else {
974 if (ie_len != 0) {
975 ND_PRINT("IE Data = ");
976 for(i = 0; i < ie_len; i++) {
977 ND_PRINT("%02x ", GET_U_1(p + i));
978 }
979 }
980 }
981 ND_PRINT("] ");
982 len += 2 + ie_len;
983 p += ie_len;
984 caplen -= 2 + ie_len;
985 if (element_id == 0x7e) {
986 *payload_ie_present = 1;
987 break;
988 }
989 if (element_id == 0x7f) {
990 break;
991 }
992 } while (caplen > 0);
993 return len;
994 }
995
996 /*
997 * Print MLME ie content.
998 */
999 static void
1000 ieee802_15_4_print_mlme_ie(netdissect_options *ndo,
1001 const u_char *p,
1002 uint16_t sub_ie_len,
1003 int sub_id)
1004 {
1005 int i, j;
1006 uint16_t len;
1007
1008 /* Note, as there is no overlap with the long and short
1009 MLME sub IDs, we can just use one switch here. */
1010 switch (sub_id) {
1011 case 0x08: /* Vendor Specific Nested IE */
1012 if (sub_ie_len < 3) {
1013 ND_PRINT("[ERROR: Vendor OUI missing]");
1014 } else {
1015 ND_PRINT("OUI = 0x%02x%02x%02x, ",
1016 GET_U_1(p),
1017 GET_U_1(p + 1),
1018 GET_U_1(p + 2));
1019 ND_PRINT("Data = ");
1020 for(i = 3; i < sub_ie_len; i++) {
1021 ND_PRINT("%02x ", GET_U_1(p + i));
1022 }
1023 }
1024 break;
1025 case 0x09: /* Channel Hopping IE */
1026 if (sub_ie_len < 1) {
1027 ND_PRINT("[ERROR: Hopping sequence ID missing]");
1028 } else if (sub_ie_len == 1) {
1029 ND_PRINT("Hopping Sequence ID = %d", GET_U_1(p));
1030 p++;
1031 sub_ie_len--;
1032 } else {
1033 uint16_t channel_page, number_of_channels;
1034
1035 ND_PRINT("Hopping Sequence ID = %d", GET_U_1(p));
1036 p++;
1037 sub_ie_len--;
1038 if (sub_ie_len < 7) {
1039 ND_PRINT("[ERROR: IE truncated]");
1040 break;
1041 }
1042 channel_page = GET_U_1(p);
1043 number_of_channels = GET_LE_U_2(p + 1);
1044 ND_PRINT("Channel Page = %d, Number of Channels = %d, ",
1045 channel_page, number_of_channels);
1046 ND_PRINT("Phy Configuration = 0x%08x, ",
1047 GET_LE_U_4(p + 3));
1048 p += 7;
1049 sub_ie_len -= 7;
1050 if (channel_page == 9 || channel_page == 10) {
1051 len = (number_of_channels + 7) / 8;
1052 if (sub_ie_len < len) {
1053 ND_PRINT("[ERROR: IE truncated]");
1054 break;
1055 }
1056 ND_PRINT("Extended bitmap = 0x");
1057 for(i = 0; i < len; i++) {
1058 ND_PRINT("%02x", GET_U_1(p + i));
1059 }
1060 ND_PRINT(", ");
1061 p += len;
1062 sub_ie_len -= len;
1063 }
1064 if (sub_ie_len < 2) {
1065 ND_PRINT("[ERROR: IE truncated]");
1066 break;
1067 }
1068 len = GET_LE_U_2(p);
1069 p += 2;
1070 sub_ie_len -= 2;
1071 ND_PRINT("Hopping Seq length = %d [ ", len);
1072
1073 if (sub_ie_len < len * 2) {
1074 ND_PRINT(" [ERROR: IE truncated]");
1075 break;
1076 }
1077 for(i = 0; i < len; i++) {
1078 ND_PRINT("%02x ", GET_LE_U_2(p + i * 2));
1079 }
1080 ND_PRINT("]");
1081 p += len * 2;
1082 sub_ie_len -= len * 2;
1083 if (sub_ie_len < 2) {
1084 ND_PRINT("[ERROR: IE truncated]");
1085 break;
1086 }
1087 ND_PRINT("Current hop = %d", GET_LE_U_2(p));
1088 }
1089
1090 break;
1091 case 0x1a: /* TSCH Syncronization IE. */
1092 if (sub_ie_len < 6) {
1093 ND_PRINT("[ERROR: Length != 6]");
1094 }
1095 ND_PRINT("ASN = %010" PRIx64 ", Join Metric = %d ",
1096 GET_LE_U_5(p), GET_U_1(p + 5));
1097 break;
1098 case 0x1b: /* TSCH Slotframe and Link IE. */
1099 {
1100 int sf_num, off, links, opts;
1101
1102 if (sub_ie_len < 1) {
1103 ND_PRINT("[ERROR: Truncated IE]");
1104 break;
1105 }
1106 sf_num = GET_U_1(p);
1107 ND_PRINT("Slotframes = %d ", sf_num);
1108 off = 1;
1109 for(i = 0; i < sf_num; i++) {
1110 if (sub_ie_len < off + 4) {
1111 ND_PRINT("[ERROR: Truncated IE before slotframes]");
1112 break;
1113 }
1114 links = GET_U_1(p + off + 3);
1115 ND_PRINT("\n\t\t\t[ Handle %d, size = %d, links = %d ",
1116 GET_U_1(p + off),
1117 GET_LE_U_2(p + off + 1),
1118 links);
1119 off += 4;
1120 for(j = 0; j < links; j++) {
1121 if (sub_ie_len < off + 5) {
1122 ND_PRINT("[ERROR: Truncated IE links]");
1123 break;
1124 }
1125 opts = GET_U_1(p + off + 4);
1126 ND_PRINT("\n\t\t\t\t[ Timeslot = %d, Offset = %d, Options = ",
1127 GET_LE_U_2(p + off),
1128 GET_LE_U_2(p + off + 2));
1129 if (opts & 0x1) { ND_PRINT("TX "); }
1130 if (opts & 0x2) { ND_PRINT("RX "); }
1131 if (opts & 0x4) { ND_PRINT("Shared "); }
1132 if (opts & 0x8) {
1133 ND_PRINT("Timekeeping ");
1134 }
1135 if (opts & 0x10) {
1136 ND_PRINT("Priority ");
1137 }
1138 off += 5;
1139 ND_PRINT("] ");
1140 }
1141 ND_PRINT("] ");
1142 }
1143 }
1144 break;
1145 case 0x1c: /* TSCH Timeslot IE. */
1146 if (sub_ie_len == 1) {
1147 ND_PRINT("Time slot ID = %d ", GET_U_1(p));
1148 } else if (sub_ie_len == 25) {
1149 ND_PRINT("Time slot ID = %d, CCA Offset = %d, CCA = %d, TX Offset = %d, RX Offset = %d, RX Ack Delay = %d, TX Ack Delay = %d, RX Wait = %d, Ack Wait = %d, RX TX = %d, Max Ack = %d, Max TX = %d, Time slot Length = %d ",
1150 GET_U_1(p),
1151 GET_LE_U_2(p + 1),
1152 GET_LE_U_2(p + 3),
1153 GET_LE_U_2(p + 5),
1154 GET_LE_U_2(p + 7),
1155 GET_LE_U_2(p + 9),
1156 GET_LE_U_2(p + 11),
1157 GET_LE_U_2(p + 13),
1158 GET_LE_U_2(p + 15),
1159 GET_LE_U_2(p + 17),
1160 GET_LE_U_2(p + 19),
1161 GET_LE_U_2(p + 21),
1162 GET_LE_U_2(p + 23));
1163 } else if (sub_ie_len == 27) {
1164 ND_PRINT("Time slot ID = %d, CCA Offset = %d, CCA = %d, TX Offset = %d, RX Offset = %d, RX Ack Delay = %d, TX Ack Delay = %d, RX Wait = %d, Ack Wait = %d, RX TX = %d, Max Ack = %d, Max TX = %d, Time slot Length = %d ",
1165 GET_U_1(p),
1166 GET_LE_U_2(p + 1),
1167 GET_LE_U_2(p + 3),
1168 GET_LE_U_2(p + 5),
1169 GET_LE_U_2(p + 7),
1170 GET_LE_U_2(p + 9),
1171 GET_LE_U_2(p + 11),
1172 GET_LE_U_2(p + 13),
1173 GET_LE_U_2(p + 15),
1174 GET_LE_U_2(p + 17),
1175 GET_LE_U_2(p + 19),
1176 GET_LE_U_3(p + 21),
1177 GET_LE_U_3(p + 24));
1178 } else {
1179 ND_PRINT("[ERROR: Length not 1, 25, or 27]");
1180 ND_PRINT("\n\t\t\tIE Data = ");
1181 for(i = 0; i < sub_ie_len; i++) {
1182 ND_PRINT("%02x ", GET_U_1(p + i));
1183 }
1184 }
1185 break;
1186 case 0x1d: /* Hopping timing IE */
1187 /* XXX Not implemented */
1188 case 0x1e: /* Enhanced Beacon Filter IE */
1189 /* XXX Not implemented */
1190 case 0x1f: /* MAC Metrics IE */
1191 /* XXX Not implemented */
1192 case 0x20: /* All MAC Metrics IE */
1193 /* XXX Not implemented */
1194 case 0x21: /* Coexistence Specification IE */
1195 /* XXX Not implemented */
1196 case 0x22: /* SUN Device Capabilities IE */
1197 /* XXX Not implemented */
1198 case 0x23: /* SUN FSK Generic PHY IE */
1199 /* XXX Not implemented */
1200 case 0x24: /* Mode Switch Parameter IE */
1201 /* XXX Not implemented */
1202 case 0x25: /* PHY Parameter Change IE */
1203 /* XXX Not implemented */
1204 case 0x26: /* O-QPSK PHY Mode IE */
1205 /* XXX Not implemented */
1206 case 0x27: /* PCA Allocation IE */
1207 /* XXX Not implemented */
1208 case 0x28: /* LECIM DSSS Operating Mode IE */
1209 /* XXX Not implemented */
1210 case 0x29: /* LECIM FSK Operating Mode IE */
1211 /* XXX Not implemented */
1212 case 0x2b: /* TVWS PHY Operating Mode Description IE */
1213 /* XXX Not implemented */
1214 case 0x2c: /* TVWS Device Capabilities IE */
1215 /* XXX Not implemented */
1216 case 0x2d: /* TVWS Device Catagory IE */
1217 /* XXX Not implemented */
1218 case 0x2e: /* TVWS Device Identification IE */
1219 /* XXX Not implemented */
1220 case 0x2f: /* TVWS Device Location IE */
1221 /* XXX Not implemented */
1222 case 0x30: /* TVWS Channel Information Query IE */
1223 /* XXX Not implemented */
1224 case 0x31: /* TVWS Channel Information Source IE */
1225 /* XXX Not implemented */
1226 case 0x32: /* CTM IE */
1227 /* XXX Not implemented */
1228 case 0x33: /* Timestamp IE */
1229 /* XXX Not implemented */
1230 case 0x34: /* Timestamp Difference IE */
1231 /* XXX Not implemented */
1232 case 0x35: /* TMCTP Specification IE */
1233 /* XXX Not implemented */
1234 case 0x36: /* TCC PHY Operating Mode IE */
1235 /* XXX Not implemented */
1236 default:
1237 ND_PRINT("IE Data = ");
1238 for(i = 0; i < sub_ie_len; i++) {
1239 ND_PRINT("%02x ", GET_U_1(p + i));
1240 }
1241 break;
1242 }
1243 }
1244
1245 /*
1246 * MLME IE list parsing and printing. See 7.4.3.2 of 802.15.4-2015
1247 * for more information.
1248 */
1249 static void
1250 ieee802_15_4_print_mlme_ie_list(netdissect_options *ndo,
1251 const u_char *p,
1252 uint16_t ie_len)
1253 {
1254 int ie, sub_id, i, type;
1255 uint16_t sub_ie_len;
1256
1257 do {
1258 if (ie_len < 2) {
1259 ND_PRINT("[ERROR: Truncated MLME IE]");
1260 return;
1261 }
1262 /* Extract IE header */
1263 ie = GET_LE_U_2(p);
1264 type = CHECK_BIT(ie, 15);
1265 if (type) {
1266 /* Long type */
1267 sub_ie_len = ie & 0x3ff;
1268 sub_id = (ie >> 11) & 0x0f;
1269 } else {
1270 sub_ie_len = ie & 0xff;
1271 sub_id = (ie >> 8) & 0x7f;
1272 }
1273
1274 /* Skip the IE header */
1275 p += 2;
1276
1277 if (type == 0) {
1278 ND_PRINT("\n\t\t%s [ length = %d, ",
1279 p_mlme_short_names[sub_id], sub_ie_len);
1280 } else {
1281 ND_PRINT("\n\t\t%s [ length = %d, ",
1282 p_mlme_long_names[sub_id], sub_ie_len);
1283 }
1284
1285 if (ie_len < sub_ie_len) {
1286 ND_PRINT("[ERROR: Truncated IE data]");
1287 return;
1288 }
1289 if (sub_ie_len != 0) {
1290 if (ndo->ndo_vflag > 3) {
1291 ieee802_15_4_print_mlme_ie(ndo, p, sub_ie_len, sub_id);
1292 } else if (ndo->ndo_vflag > 2) {
1293 ND_PRINT("IE Data = ");
1294 for(i = 0; i < sub_ie_len; i++) {
1295 ND_PRINT("%02x ", GET_U_1(p + i));
1296 }
1297 }
1298 }
1299 ND_PRINT("] ");
1300 p += sub_ie_len;
1301 ie_len -= 2 + sub_ie_len;
1302 } while (ie_len > 0);
1303 return;
1304 }
1305
1306 /*
1307 * Multiplexd IE (802.15.9) parsing and printing.
1308 *
1309 * Returns number of bytes consumed from packet or -1 in case of error.
1310 */
1311 static void
1312 ieee802_15_4_print_mpx_ie(netdissect_options *ndo,
1313 const u_char *p,
1314 uint16_t ie_len)
1315 {
1316 int transfer_type, tid;
1317 int fragment_number, data_start;
1318 int i;
1319
1320 data_start = 0;
1321 if (ie_len < 1) {
1322 ND_PRINT("[ERROR: Transaction control byte missing]");
1323 return;
1324 }
1325
1326 transfer_type = GET_U_1(p) & 0x7;
1327 tid = GET_U_1(p) >> 3;
1328 switch (transfer_type) {
1329 case 0x00: /* Full upper layer frame. */
1330 case 0x01: /* Full upper layer frame with small Multiplex ID. */
1331 ND_PRINT("Type = Full upper layer fragment%s, ",
1332 (transfer_type == 0x01 ?
1333 " with small Multiplex ID" : ""));
1334 if (transfer_type == 0x00) {
1335 if (ie_len < 3) {
1336 ND_PRINT("[ERROR: Multiplex ID missing]");
1337 return;
1338 }
1339 data_start = 3;
1340 ND_PRINT("tid = 0x%02x, Multiplex ID = 0x%04x, ",
1341 tid, GET_LE_U_2(p + 1));
1342 } else {
1343 data_start = 1;
1344 ND_PRINT("Multiplex ID = 0x%04x, ", tid);
1345 }
1346 break;
1347 case 0x02: /* First, or middle, Fragments */
1348 case 0x04: /* Last fragment */
1349 if (ie_len < 2) {
1350 ND_PRINT("[ERROR: fragment number missing]");
1351 return;
1352 }
1353
1354 fragment_number = GET_U_1(p + 1);
1355 ND_PRINT("Type = %s, tid = 0x%02x, fragment = 0x%02x, ",
1356 (transfer_type == 0x02 ?
1357 (fragment_number == 0 ?
1358 "First fragment" : "Middle fragment") :
1359 "Last fragment"), tid,
1360 fragment_number);
1361 data_start = 2;
1362 if (fragment_number == 0) {
1363 int total_size, multiplex_id;
1364
1365 if (ie_len < 6) {
1366 ND_PRINT("[ERROR: Total upper layer size or multiplex ID missing]");
1367 return;
1368 }
1369 total_size = GET_LE_U_2(p + 2);
1370 multiplex_id = GET_LE_U_2(p + 4);
1371 ND_PRINT("Total upper layer size = 0x%04x, Multiplex ID = 0x%04x, ",
1372 total_size, multiplex_id);
1373 data_start = 6;
1374 }
1375 break;
1376 case 0x06: /* Abort code */
1377 if (ie_len == 1) {
1378 ND_PRINT("Type = Abort, tid = 0x%02x, no max size given",
1379 tid);
1380 } else if (ie_len == 3) {
1381 ND_PRINT("Type = Abort, tid = 0x%02x, max size = 0x%04x",
1382 tid, GET_LE_U_2(p + 1));
1383 } else {
1384 ND_PRINT("Type = Abort, tid = 0x%02x, invalid length = %d (not 1 or 3)",
1385 tid, ie_len);
1386 ND_PRINT("Abort data = ");
1387 for(i = 1; i < ie_len; i++) {
1388 ND_PRINT("%02x ", GET_U_1(p + i));
1389 }
1390 }
1391 return;
1392 /* NOTREACHED */
1393 break;
1394 case 0x03: /* Reserved */
1395 case 0x05: /* Reserved */
1396 case 0x07: /* Reserved */
1397 ND_PRINT("Type = %d (Reserved), tid = 0x%02x, ",
1398 transfer_type, tid);
1399 data_start = 1;
1400 break;
1401 }
1402
1403 ND_PRINT("Upper layer data = ");
1404 for(i = data_start; i < ie_len; i++) {
1405 ND_PRINT("%02x ", GET_U_1(p + i));
1406 }
1407 }
1408
1409 /*
1410 * Payload IE list parsing and printing. See 7.4.3 of 802.15.4-2015
1411 * for more information.
1412 *
1413 * Returns number of byts consumed from the packet or -1 in case of error.
1414 */
1415 static int
1416 ieee802_15_4_print_payload_ie_list(netdissect_options *ndo,
1417 const u_char *p,
1418 u_int caplen)
1419 {
1420 int len, ie, group_id, i;
1421 uint16_t ie_len;
1422
1423 len = 0;
1424 do {
1425 if (caplen < 2) {
1426 ND_PRINT("[ERROR: Truncated header IE]");
1427 return -1;
1428 }
1429 /* Extract IE header */
1430 ie = GET_LE_U_2(p);
1431 if ((CHECK_BIT(ie, 15)) == 0) {
1432 ND_PRINT("[ERROR: Payload IE with type 0] ");
1433 }
1434 ie_len = ie & 0x3ff;
1435 group_id = (ie >> 11) & 0x0f;
1436
1437 /* Skip the IE header */
1438 p += 2;
1439 if (ie_len == 0) {
1440 ND_PRINT("\n\t%s [", p_ie_names[group_id]);
1441 } else {
1442 ND_PRINT("\n\t%s [ length = %d, ",
1443 p_ie_names[group_id], ie_len);
1444 }
1445 if (caplen < ie_len) {
1446 ND_PRINT("[ERROR: Truncated IE data]");
1447 return -1;
1448 }
1449 if (ndo->ndo_vflag > 3 && ie_len != 0) {
1450 switch (group_id) {
1451 case 0x1: /* MLME IE */
1452 ieee802_15_4_print_mlme_ie_list(ndo, p, ie_len);
1453 break;
1454 case 0x2: /* Vendor Specific Nested IE */
1455 if (ie_len < 3) {
1456 ND_PRINT("[ERROR: Vendor OUI missing]");
1457 } else {
1458 ND_PRINT("OUI = 0x%02x%02x%02x, ",
1459 GET_U_1(p),
1460 GET_U_1(p + 1),
1461 GET_U_1(p + 2));
1462 ND_PRINT("Data = ");
1463 for(i = 3; i < ie_len; i++) {
1464 ND_PRINT("%02x ",
1465 GET_U_1(p + i));
1466 }
1467 }
1468 break;
1469 case 0x3: /* Multiplexed IE (802.15.9) */
1470 ieee802_15_4_print_mpx_ie(ndo, p, ie_len);
1471 break;
1472 case 0x5: /* IETF IE */
1473 if (ie_len < 1) {
1474 ND_PRINT("[ERROR: Subtype ID missing]");
1475 } else {
1476 ND_PRINT("Subtype ID = 0x%02x, Subtype content = ",
1477 GET_U_1(p));
1478 for(i = 1; i < ie_len; i++) {
1479 ND_PRINT("%02x ",
1480 GET_U_1(p + i));
1481 }
1482 }
1483 break;
1484 default:
1485 ND_PRINT("IE Data = ");
1486 for(i = 0; i < ie_len; i++) {
1487 ND_PRINT("%02x ", GET_U_1(p + i));
1488 }
1489 break;
1490 }
1491 } else {
1492 if (ie_len != 0) {
1493 ND_PRINT("IE Data = ");
1494 for(i = 0; i < ie_len; i++) {
1495 ND_PRINT("%02x ", GET_U_1(p + i));
1496 }
1497 }
1498 }
1499 ND_PRINT("]\n\t");
1500 len += 2 + ie_len;
1501 p += ie_len;
1502 caplen -= 2 + ie_len;
1503 if (group_id == 0xf) {
1504 break;
1505 }
1506 } while (caplen > 0);
1507 return len;
1508 }
1509
1510 /*
1511 * Parse and print auxiliary security header.
1512 *
1513 * Returns number of byts consumed from the packet or -1 in case of error.
1514 */
1515 static int
1516 ieee802_15_4_print_aux_sec_header(netdissect_options *ndo,
1517 const u_char *p,
1518 u_int caplen,
1519 int *security_level)
1520 {
1521 int sc, key_id_mode, len;
1522
1523 if (caplen < 1) {
1524 ND_PRINT("[ERROR: Truncated before Aux Security Header]");
1525 return -1;
1526 }
1527 sc = GET_U_1(p);
1528 len = 1;
1529 *security_level = sc & 0x7;
1530 key_id_mode = (sc >> 3) & 0x3;
1531
1532 caplen -= 1;
1533 p += 1;
1534
1535 if (ndo->ndo_vflag > 0) {
1536 ND_PRINT("\n\tSecurity Level %d, Key Id Mode %d, ",
1537 *security_level, key_id_mode);
1538 }
1539 if ((CHECK_BIT(sc, 5)) == 0) {
1540 if (caplen < 4) {
1541 ND_PRINT("[ERROR: Truncated before Frame Counter]");
1542 return -1;
1543 }
1544 if (ndo->ndo_vflag > 1) {
1545 ND_PRINT("Frame Counter 0x%08x ",
1546 GET_LE_U_4(p));
1547 }
1548 p += 4;
1549 caplen -= 4;
1550 len += 4;
1551 }
1552 switch (key_id_mode) {
1553 case 0x00: /* Implicit. */
1554 if (ndo->ndo_vflag > 1) {
1555 ND_PRINT("Implicit");
1556 }
1557 return len;
1558 break;
1559 case 0x01: /* Key Index, nothing to print here. */
1560 break;
1561 case 0x02: /* PAN and Short address Key Source, and Key Index. */
1562 if (caplen < 4) {
1563 ND_PRINT("[ERROR: Truncated before Key Source]");
1564 return -1;
1565 }
1566 if (ndo->ndo_vflag > 1) {
1567 ND_PRINT("KeySource 0x%04x:%0x4x, ",
1568 GET_LE_U_2(p), GET_LE_U_2(p + 2));
1569 }
1570 p += 4;
1571 caplen -= 4;
1572 len += 4;
1573 break;
1574 case 0x03: /* Extended address and Key Index. */
1575 if (caplen < 8) {
1576 ND_PRINT("[ERROR: Truncated before Key Source]");
1577 return -1;
1578 }
1579 if (ndo->ndo_vflag > 1) {
1580 ND_PRINT("KeySource %s, ", GET_LE64ADDR_STRING(p));
1581 }
1582 p += 4;
1583 caplen -= 4;
1584 len += 4;
1585 break;
1586 }
1587 if (caplen < 1) {
1588 ND_PRINT("[ERROR: Truncated before Key Index]");
1589 return -1;
1590 }
1591 if (ndo->ndo_vflag > 1) {
1592 ND_PRINT("KeyIndex 0x%02x, ", GET_U_1(p));
1593 }
1594 caplen -= 1;
1595 p += 1;
1596 len += 1;
1597 return len;
1598 }
1599
1600 /*
1601 * Print command data.
1602 *
1603 * Returns number of byts consumed from the packet or -1 in case of error.
1604 */
1605 static int
1606 ieee802_15_4_print_command_data(netdissect_options *ndo,
1607 uint8_t command_id,
1608 const u_char *p,
1609 u_int caplen)
1610 {
1611 u_int i;
1612
1613 switch (command_id) {
1614 case 0x01: /* Assocation Request */
1615 if (caplen != 1) {
1616 ND_PRINT("Invalid Assocation request command length");
1617 return -1;
1618 } else {
1619 uint8_t cap_info;
1620 cap_info = GET_U_1(p);
1621 ND_PRINT("%s%s%s%s%s%s",
1622 ((cap_info & 0x02) ?
1623 "FFD, " : "RFD, "),
1624 ((cap_info & 0x04) ?
1625 "AC powered, " : ""),
1626 ((cap_info & 0x08) ?
1627 "Receiver on when idle, " : ""),
1628 ((cap_info & 0x10) ?
1629 "Fast association, " : ""),
1630 ((cap_info & 0x40) ?
1631 "Security supported, " : ""),
1632 ((cap_info & 0x80) ?
1633 "Allocate address, " : ""));
1634 return caplen;
1635 }
1636 break;
1637 case 0x02: /* Assocation Response */
1638 if (caplen != 3) {
1639 ND_PRINT("Invalid Assocation response command length");
1640 return -1;
1641 } else {
1642 ND_PRINT("Short address = ");
1643 ieee802_15_4_print_addr(ndo, p, 2);
1644 switch (GET_U_1(p + 2)) {
1645 case 0x00:
1646 ND_PRINT(", Association successful");
1647 break;
1648 case 0x01:
1649 ND_PRINT(", PAN at capacity");
1650 break;
1651 case 0x02:
1652 ND_PRINT(", PAN access denied");
1653 break;
1654 case 0x03:
1655 ND_PRINT(", Hooping sequence offset duplication");
1656 break;
1657 case 0x80:
1658 ND_PRINT(", Fast association successful");
1659 break;
1660 default:
1661 ND_PRINT(", Status = 0x%02x",
1662 GET_U_1(p + 2));
1663 break;
1664 }
1665 return caplen;
1666 }
1667 break;
1668 case 0x03: /* Diassociation Notification command */
1669 if (caplen != 1) {
1670 ND_PRINT("Invalid Disassociation Notification command length");
1671 return -1;
1672 } else {
1673 switch (GET_U_1(p)) {
1674 case 0x00:
1675 ND_PRINT("Reserved");
1676 break;
1677 case 0x01:
1678 ND_PRINT("Reason = The coordinator wishes the device to leave PAN");
1679 break;
1680 case 0x02:
1681 ND_PRINT("Reason = The device wishes to leave the PAN");
1682 break;
1683 default:
1684 ND_PRINT("Reason = 0x%02x", GET_U_1(p + 2));
1685 break;
1686 }
1687 return caplen;
1688 }
1689
1690 /* Following ones do not have any data. */
1691 case 0x04: /* Data Request command */
1692 case 0x05: /* PAN ID Conflict Notification command */
1693 case 0x06: /* Orphan Notification command */
1694 case 0x07: /* Beacon Request command */
1695 /* Should not have any data. */
1696 return 0;
1697 case 0x08: /* Coordinator Realignment command */
1698 if (caplen < 7 || caplen > 8) {
1699 ND_PRINT("Invalid Coordinator Realignment command length");
1700 return -1;
1701 } else {
1702 uint16_t channel, page;
1703
1704 ND_PRINT("Pan ID = 0x%04x, Coordinator short address = ",
1705 GET_LE_U_2(p));
1706 ieee802_15_4_print_addr(ndo, p + 2, 2);
1707 channel = GET_U_1(p + 4);
1708
1709 if (caplen == 8) {
1710 page = GET_U_1(p + 7);
1711 } else {
1712 page = 0x80;
1713 }
1714 if (CHECK_BIT(page, 7)) {
1715 /* No page present, instead we have msb of
1716 channel in the page. */
1717 channel |= (page & 0x7f) << 8;
1718 ND_PRINT(", Channel Number = %d", channel);
1719 } else {
1720 ND_PRINT(", Channel Number = %d, page = %d",
1721 channel, page);
1722 }
1723 ND_PRINT(", Short address = ");
1724 ieee802_15_4_print_addr(ndo, p + 5, 2);
1725 return caplen;
1726 }
1727 break;
1728 case 0x09: /* GTS Request command */
1729 if (caplen != 1) {
1730 ND_PRINT("Invalid GTS Request command length");
1731 return -1;
1732 } else {
1733 uint8_t gts;
1734
1735 gts = GET_U_1(p);
1736 ND_PRINT("GTS Length = %d, %s, %s",
1737 gts & 0xf,
1738 (CHECK_BIT(gts, 4) ?
1739 "Receive-only GTS" : "Transmit-only GTS"),
1740 (CHECK_BIT(gts, 5) ?
1741 "GTS allocation" : "GTS deallocations"));
1742 return caplen;
1743 }
1744 break;
1745 case 0x13: /* DSME Association Request command */
1746 /* XXX Not implemented */
1747 case 0x14: /* DSME Association Response command */
1748 /* XXX Not implemented */
1749 case 0x15: /* DSME GTS Request command */
1750 /* XXX Not implemented */
1751 case 0x16: /* DSME GTS Response command */
1752 /* XXX Not implemented */
1753 case 0x17: /* DSME GTS Notify command */
1754 /* XXX Not implemented */
1755 case 0x18: /* DSME Information Request command */
1756 /* XXX Not implemented */
1757 case 0x19: /* DSME Information Response command */
1758 /* XXX Not implemented */
1759 case 0x1a: /* DSME Beacon Allocation Notification command */
1760 /* XXX Not implemented */
1761 case 0x1b: /* DSME Beacon Collision Notification command */
1762 /* XXX Not implemented */
1763 case 0x1c: /* DSME Link Report command */
1764 /* XXX Not implemented */
1765 case 0x20: /* RIT Data Request command */
1766 /* XXX Not implemented */
1767 case 0x21: /* DBS Request command */
1768 /* XXX Not implemented */
1769 case 0x22: /* DBS Response command */
1770 /* XXX Not implemented */
1771 case 0x23: /* RIT Data Response command */
1772 /* XXX Not implemented */
1773 case 0x24: /* Vendor Specific command */
1774 /* XXX Not implemented */
1775 case 0x0a: /* TRLE Management Request command */
1776 /* XXX Not implemented */
1777 case 0x0b: /* TRLE Management Response command */
1778 /* XXX Not implemented */
1779 default:
1780 ND_PRINT("Command Data = ");
1781 for(i = 0; i < caplen; i++) {
1782 ND_PRINT("%02x ", GET_U_1(p + i));
1783 }
1784 break;
1785 }
1786 return 0;
1787 }
1788
1789 /*
1790 * Parse and print frames folloing standard format.
1791 *
1792 * Returns FALSE in case of error.
1793 */
1794 static u_int
1795 ieee802_15_4_std_frames(netdissect_options *ndo,
1796 const u_char *p, u_int caplen,
1797 uint16_t fc)
1798 {
1799 int len, frame_version, pan_id_comp;
1800 int frame_type;
1801 int src_pan, dst_pan, src_addr_len, dst_addr_len;
1802 int security_level, miclen = 0;
1803 int payload_ie_present;
1804 uint8_t seq;
1805 uint32_t fcs, crc_check;
1806 const u_char *mic_start = NULL;
1807
1808 payload_ie_present = 0;
1809
1810 crc_check = 0;
1811 /* Assume 2 octet FCS, the FCS length depends on the PHY, and we do not
1812 know about that. */
1813 if (caplen < 4) {
1814 /* Cannot have FCS, assume no FCS. */
1815 fcs = 0;
1816 } else {
1817 /* Test for 4 octet FCS. */
1818 fcs = GET_LE_U_4(p + caplen - 4);
1819 crc_check = ieee802_15_4_crc32(ndo, p, caplen - 4);
1820 if (crc_check == fcs) {
1821 /* Remove FCS */
1822 caplen -= 4;
1823 } else {
1824 /* Test for 2 octet FCS. */
1825 fcs = GET_LE_U_2(p + caplen - 2);
1826 crc_check = ieee802_15_4_crc16(ndo, p, caplen - 2);
1827 if (crc_check == fcs) {
1828 /* Remove FCS */
1829 caplen -= 2;
1830 } else {
1831 /* Wrong FCS, FCS might not be included in the
1832 captured frame, do not remove it. */
1833 }
1834 }
1835 }
1836
1837 /* Frame version. */
1838 frame_version = FC_FRAME_VERSION(fc);
1839 frame_type = FC_FRAME_TYPE(fc);
1840 ND_PRINT("v%d ", frame_version);
1841
1842 if (ndo->ndo_vflag > 2) {
1843 if (CHECK_BIT(fc, 3)) { ND_PRINT("Security Enabled, "); }
1844 if (CHECK_BIT(fc, 4)) { ND_PRINT("Frame Pending, "); }
1845 if (CHECK_BIT(fc, 5)) { ND_PRINT("AR, "); }
1846 if (CHECK_BIT(fc, 6)) { ND_PRINT("PAN ID Compression, "); }
1847 if (CHECK_BIT(fc, 8)) { ND_PRINT("Sequence Number Suppression, "); }
1848 if (CHECK_BIT(fc, 9)) { ND_PRINT("IE present, "); }
1849 }
1850
1851 /* Check for the sequence number supression. */
1852 if (CHECK_BIT(fc, 8)) {
1853 /* Sequence number is suppressed. */
1854 if (frame_version < 2) {
1855 /* Sequence number can only be supressed for frame
1856 version 2 or higher, this is invalid frame. */
1857 ND_PRINT("[ERROR: Sequence number suppressed on frames where version < 2]");
1858 }
1859 if (ndo->ndo_vflag)
1860 ND_PRINT("seq suppressed ");
1861 p += 2;
1862 caplen -= 2;
1863 } else {
1864 seq = GET_U_1(p + 2);
1865 p += 3;
1866 caplen -= 3;
1867 if (ndo->ndo_vflag)
1868 ND_PRINT("seq %02x ", seq);
1869 }
1870
1871 /* See which parts of addresses we have. */
1872 dst_addr_len = ieee802_15_4_addr_len((fc >> 10) & 0x3);
1873 src_addr_len = ieee802_15_4_addr_len((fc >> 14) & 0x3);
1874 if (src_addr_len < 0) {
1875 ND_PRINT("[ERROR: Invalid src address mode]");
1876 return 0;
1877 }
1878 if (dst_addr_len < 0) {
1879 ND_PRINT("[ERROR: Invalid dst address mode]");
1880 return 0;
1881 }
1882 src_pan = 0;
1883 dst_pan = 0;
1884 pan_id_comp = CHECK_BIT(fc, 6);
1885
1886 /* The PAN ID Compression rules are complicated. */
1887
1888 /* First check old versions, where the rules are simple. */
1889 if (frame_version < 2) {
1890 if (pan_id_comp) {
1891 src_pan = 0;
1892 dst_pan = 1;
1893 if (dst_addr_len <= 0 || src_addr_len <= 0) {
1894 /* Invalid frame, PAN ID Compression must be 0
1895 if only one address in the frame. */
1896 ND_PRINT("[ERROR: PAN ID Compression != 0, and only one address with frame version < 2]");
1897 }
1898 } else {
1899 src_pan = 1;
1900 dst_pan = 1;
1901 }
1902 if (dst_addr_len <= 0) {
1903 dst_pan = 0;
1904 }
1905 if (src_addr_len <= 0) {
1906 src_pan = 0;
1907 }
1908 } else {
1909 /* Frame version 2 rules are more complicated, and they depend
1910 on the address modes of the frame, generic rules are same,
1911 but then there are some special cases. */
1912 if (pan_id_comp) {
1913 src_pan = 0;
1914 dst_pan = 1;
1915 } else {
1916 src_pan = 1;
1917 dst_pan = 1;
1918 }
1919 if (dst_addr_len <= 0) {
1920 dst_pan = 0;
1921 }
1922 if (src_addr_len <= 0) {
1923 src_pan = 0;
1924 }
1925 if (pan_id_comp) {
1926 if (src_addr_len == 0 &&
1927 dst_addr_len == 0) {
1928 /* Both addresses are missing, but PAN ID
1929 compression set, special case we have
1930 destination PAN but no addresses. */
1931 dst_pan = 1;
1932 } else if ((src_addr_len == 0 &&
1933 dst_addr_len > 0) ||
1934 (src_addr_len > 0 &&
1935 dst_addr_len == 0)) {
1936 /* Only one address present, and PAN ID
1937 compression is set, we do not have PAN id at
1938 all. */
1939 dst_pan = 0;
1940 src_pan = 0;
1941 } else if (src_addr_len == 8 &&
1942 dst_addr_len == 8) {
1943 /* Both addresses are Extended, and PAN ID
1944 compression set, we do not have PAN ID at
1945 all. */
1946 dst_pan = 0;
1947 src_pan = 0;
1948 }
1949 } else {
1950 /* Special cases where PAN ID Compression is not set. */
1951 if (src_addr_len == 8 &&
1952 dst_addr_len == 8) {
1953 /* Both addresses are Extended, and PAN ID
1954 compression not set, we do have only one PAN
1955 ID (destination). */
1956 dst_pan = 1;
1957 src_pan = 0;
1958 }
1959 #ifdef BROKEN_6TISCH_PAN_ID_COMPRESSION
1960 if (src_addr_len == 8 &&
1961 dst_addr_len == 2) {
1962 /* Special case for the broken 6tisch
1963 implementations. */
1964 src_pan = 0;
1965 }
1966 #endif /* BROKEN_6TISCH_PAN_ID_COMPRESSION */
1967 }
1968 }
1969
1970 /* Print dst PAN and address. */
1971 if (dst_pan) {
1972 if (caplen < 2) {
1973 ND_PRINT("[ERROR: Truncated before dst_pan]");
1974 return 0;
1975 }
1976 ND_PRINT("%04x:", GET_LE_U_2(p));
1977 p += 2;
1978 caplen -= 2;
1979 } else {
1980 ND_PRINT("-:");
1981 }
1982 if (caplen < (u_int) dst_addr_len) {
1983 ND_PRINT("[ERROR: Truncated before dst_addr]");
1984 return 0;
1985 }
1986 ieee802_15_4_print_addr(ndo, p, dst_addr_len);
1987 p += dst_addr_len;
1988 caplen -= dst_addr_len;
1989
1990 ND_PRINT(" < ");
1991
1992 /* Print src PAN and address. */
1993 if (src_pan) {
1994 if (caplen < 2) {
1995 ND_PRINT("[ERROR: Truncated before dst_pan]");
1996 return 0;
1997 }
1998 ND_PRINT("%04x:", GET_LE_U_2(p));
1999 p += 2;
2000 caplen -= 2;
2001 } else {
2002 ND_PRINT("-:");
2003 }
2004 if (caplen < (u_int) src_addr_len) {
2005 ND_PRINT("[ERROR: Truncated before dst_addr]");
2006 return 0;
2007 }
2008 ieee802_15_4_print_addr(ndo, p, src_addr_len);
2009 ND_PRINT(" ");
2010 p += src_addr_len;
2011 caplen -= src_addr_len;
2012 if (CHECK_BIT(fc, 3)) {
2013 /*
2014 * XXX - if frame_version is 0, this is the 2003
2015 * spec, and you don't have the auxiliary security
2016 * header, you have a frame counter and key index
2017 * for the AES-CTR and AES-CCM security suites but
2018 * not for the AES-CBC-MAC security suite.
2019 */
2020 len = ieee802_15_4_print_aux_sec_header(ndo, p, caplen,
2021 &security_level);
2022 if (len < 0) {
2023 return 0;
2024 }
2025 p += len;
2026 caplen -= len;
2027 } else {
2028 security_level = 0;
2029 }
2030
2031 switch (security_level) {
2032 case 0: /*FALLTHOUGH */
2033 case 4:
2034 miclen = 0;
2035 break;
2036 case 1: /*FALLTHOUGH */
2037 case 5:
2038 miclen = 4;
2039 break;
2040 case 2: /*FALLTHOUGH */
2041 case 6:
2042 miclen = 8;
2043 break;
2044 case 3: /*FALLTHOUGH */
2045 case 7:
2046 miclen = 16;
2047 break;
2048 }
2049
2050 /* Remove MIC */
2051 if (miclen > 0) {
2052 if (caplen < (u_int) miclen) {
2053 ND_PRINT("[ERROR: Truncated before MIC]");
2054 return 0;
2055 }
2056 caplen -= miclen;
2057 mic_start = p + caplen;
2058 }
2059
2060 /* Parse Information elements if present */
2061 if (CHECK_BIT(fc, 9)) {
2062 /* Yes we have those. */
2063 len = ieee802_15_4_print_header_ie_list(ndo, p, caplen,
2064 &payload_ie_present);
2065 if (len < 0) {
2066 return 0;
2067 }
2068 p += len;
2069 caplen -= len;
2070 }
2071
2072 if (payload_ie_present) {
2073 if (security_level >= 4) {
2074 ND_PRINT("Payload IEs present, but encrypted, cannot print ");
2075 } else {
2076 len = ieee802_15_4_print_payload_ie_list(ndo, p, caplen);
2077 if (len < 0) {
2078 return 0;
2079 }
2080 p += len;
2081 caplen -= len;
2082 }
2083 }
2084
2085 /* Print MIC */
2086 if (ndo->ndo_vflag > 2 && miclen != 0) {
2087 ND_PRINT("\n\tMIC ");
2088
2089 for(len = 0; len < miclen; len++) {
2090 ND_PRINT("%02x", GET_U_1(mic_start + len));
2091 }
2092 ND_PRINT(" ");
2093 }
2094
2095 /* Print FCS */
2096 if (ndo->ndo_vflag > 2) {
2097 if (crc_check == fcs) {
2098 ND_PRINT("FCS %x ", fcs);
2099 } else {
2100 ND_PRINT("wrong FCS %x vs %x (assume no FCS stored) ",
2101 fcs, crc_check);
2102 }
2103 }
2104
2105 /* Payload print */
2106 switch (frame_type) {
2107 case 0x00: /* Beacon */
2108 if (frame_version < 2) {
2109 if (caplen < 2) {
2110 ND_PRINT("[ERROR: Truncated before beacon information]");
2111 break;
2112 } else {
2113 uint16_t ss;
2114
2115 ss = GET_LE_U_2(p);
2116 ieee802_15_4_print_superframe_specification(ndo, ss);
2117 p += 2;
2118 caplen -= 2;
2119
2120 /* GTS */
2121 if (caplen < 1) {
2122 ND_PRINT("[ERROR: Truncated before GTS info]");
2123 break;
2124 }
2125
2126 len = ieee802_15_4_print_gts_info(ndo, p, caplen);
2127 if (len < 0) {
2128 break;
2129 }
2130
2131 p += len;
2132 caplen -= len;
2133
2134 /* Pending Addresses */
2135 if (caplen < 1) {
2136 ND_PRINT("[ERROR: Truncated before pending addresses]");
2137 break;
2138 }
2139 len = ieee802_15_4_print_pending_addresses(ndo, p, caplen);
2140 if (len < 0) {
2141 break;
2142 }
2143 p += len;
2144 caplen -= len;
2145 }
2146 }
2147 if (!ndo->ndo_suppress_default_print)
2148 ND_DEFAULTPRINT(p, caplen);
2149
2150 break;
2151 case 0x01: /* Data */
2152 case 0x02: /* Acknowledgement */
2153 if (!ndo->ndo_suppress_default_print)
2154 ND_DEFAULTPRINT(p, caplen);
2155 break;
2156 case 0x03: /* MAC Command */
2157 if (caplen < 1) {
2158 ND_PRINT("[ERROR: Truncated before Command ID]");
2159 } else {
2160 uint8_t command_id;
2161
2162 command_id = GET_U_1(p);
2163 if (command_id >= 0x30) {
2164 ND_PRINT("Command ID = Reserved 0x%02x ",
2165 command_id);
2166 } else {
2167 ND_PRINT("Command ID = %s ",
2168 mac_c_names[command_id]);
2169 }
2170 p++;
2171 caplen--;
2172 if (caplen != 0) {
2173 len = ieee802_15_4_print_command_data(ndo, command_id, p, caplen);
2174 if (len >= 0) {
2175 p += len;
2176 caplen -= len;
2177 }
2178 }
2179 }
2180 if (!ndo->ndo_suppress_default_print)
2181 ND_DEFAULTPRINT(p, caplen);
2182 break;
2183 }
2184 return 1;
2185 }
2186
2187 /*
2188 * Print and parse Multipurpose frames.
2189 *
2190 * Returns FALSE in case of error.
2191 */
2192 static u_int
2193 ieee802_15_4_mp_frame(netdissect_options *ndo,
2194 const u_char *p, u_int caplen,
2195 uint16_t fc)
2196 {
2197 int len, frame_version, pan_id_present;
2198 int src_addr_len, dst_addr_len;
2199 int security_level, miclen = 0;
2200 int ie_present, payload_ie_present, security_enabled;
2201 uint8_t seq;
2202 uint32_t fcs, crc_check;
2203 const u_char *mic_start = NULL;
2204
2205 pan_id_present = 0;
2206 ie_present = 0;
2207 payload_ie_present = 0;
2208 security_enabled = 0;
2209 crc_check = 0;
2210
2211 /* Assume 2 octet FCS, the FCS length depends on the PHY, and we do not
2212 know about that. */
2213 if (caplen < 3) {
2214 /* Cannot have FCS, assume no FCS. */
2215 fcs = 0;
2216 } else {
2217 if (caplen > 4) {
2218 /* Test for 4 octet FCS. */
2219 fcs = GET_LE_U_4(p + caplen - 4);
2220 crc_check = ieee802_15_4_crc32(ndo, p, caplen - 4);
2221 if (crc_check == fcs) {
2222 /* Remove FCS */
2223 caplen -= 4;
2224 } else {
2225 fcs = GET_LE_U_2(p + caplen - 2);
2226 crc_check = ieee802_15_4_crc16(ndo, p, caplen - 2);
2227 if (crc_check == fcs) {
2228 /* Remove FCS */
2229 caplen -= 2;
2230 }
2231 }
2232 } else {
2233 fcs = GET_LE_U_2(p + caplen - 2);
2234 crc_check = ieee802_15_4_crc16(ndo, p, caplen - 2);
2235 if (crc_check == fcs) {
2236 /* Remove FCS */
2237 caplen -= 2;
2238 }
2239 }
2240 }
2241
2242 if (CHECK_BIT(fc, 3)) {
2243 /* Long Frame Control */
2244
2245 /* Frame version. */
2246 frame_version = FC_FRAME_VERSION(fc);
2247 ND_PRINT("v%d ", frame_version);
2248
2249 pan_id_present = CHECK_BIT(fc, 8);
2250 ie_present = CHECK_BIT(fc, 15);
2251 security_enabled = CHECK_BIT(fc, 9);
2252
2253 if (ndo->ndo_vflag > 2) {
2254 if (security_enabled) { ND_PRINT("Security Enabled, "); }
2255 if (CHECK_BIT(fc, 11)) { ND_PRINT("Frame Pending, "); }
2256 if (CHECK_BIT(fc, 14)) { ND_PRINT("AR, "); }
2257 if (pan_id_present) { ND_PRINT("PAN ID Present, "); }
2258 if (CHECK_BIT(fc, 10)) {
2259 ND_PRINT("Sequence Number Suppression, ");
2260 }
2261 if (ie_present) { ND_PRINT("IE present, "); }
2262 }
2263
2264 /* Check for the sequence number supression. */
2265 if (CHECK_BIT(fc, 10)) {
2266 /* Sequence number is suppressed, but long version. */
2267 p += 2;
2268 caplen -= 2;
2269 } else {
2270 seq = GET_U_1(p + 2);
2271 p += 3;
2272 caplen -= 3;
2273 if (ndo->ndo_vflag)
2274 ND_PRINT("seq %02x ", seq);
2275 }
2276 } else {
2277 /* Short format of header, but with seq no */
2278 seq = GET_U_1(p + 1);
2279 p += 2;
2280 caplen -= 2;
2281 if (ndo->ndo_vflag)
2282 ND_PRINT("seq %02x ", seq);
2283 }
2284
2285 /* See which parts of addresses we have. */
2286 dst_addr_len = ieee802_15_4_addr_len((fc >> 4) & 0x3);
2287 src_addr_len = ieee802_15_4_addr_len((fc >> 6) & 0x3);
2288 if (src_addr_len < 0) {
2289 ND_PRINT("[ERROR: Invalid src address mode]");
2290 return 0;
2291 }
2292 if (dst_addr_len < 0) {
2293 ND_PRINT("[ERROR: Invalid dst address mode]");
2294 return 0;
2295 }
2296
2297 /* Print dst PAN and address. */
2298 if (pan_id_present) {
2299 if (caplen < 2) {
2300 ND_PRINT("[ERROR: Truncated before dst_pan]");
2301 return 0;
2302 }
2303 ND_PRINT("%04x:", GET_LE_U_2(p));
2304 p += 2;
2305 caplen -= 2;
2306 } else {
2307 ND_PRINT("-:");
2308 }
2309 if (caplen < (u_int) dst_addr_len) {
2310 ND_PRINT("[ERROR: Truncated before dst_addr]");
2311 return 0;
2312 }
2313 ieee802_15_4_print_addr(ndo, p, dst_addr_len);
2314 p += dst_addr_len;
2315 caplen -= dst_addr_len;
2316
2317 ND_PRINT(" < ");
2318
2319 /* Print src PAN and address. */
2320 ND_PRINT(" -:");
2321 if (caplen < (u_int) src_addr_len) {
2322 ND_PRINT("[ERROR: Truncated before dst_addr]");
2323 return 0;
2324 }
2325 ieee802_15_4_print_addr(ndo, p, src_addr_len);
2326 ND_PRINT(" ");
2327 p += src_addr_len;
2328 caplen -= src_addr_len;
2329
2330 if (security_enabled) {
2331 len = ieee802_15_4_print_aux_sec_header(ndo, p, caplen,
2332 &security_level);
2333 if (len < 0) {
2334 return 0;
2335 }
2336 p += len;
2337 caplen -= len;
2338 } else {
2339 security_level = 0;
2340 }
2341
2342 switch (security_level) {
2343 case 0: /*FALLTHOUGH */
2344 case 4:
2345 miclen = 0;
2346 break;
2347 case 1: /*FALLTHOUGH */
2348 case 5:
2349 miclen = 4;
2350 break;
2351 case 2: /*FALLTHOUGH */
2352 case 6:
2353 miclen = 8;
2354 break;
2355 case 3: /*FALLTHOUGH */
2356 case 7:
2357 miclen = 16;
2358 break;
2359 }
2360
2361 /* Remove MIC */
2362 if (miclen > 0) {
2363 if (caplen < (u_int) miclen) {
2364 ND_PRINT("[ERROR: Truncated before MIC]");
2365 return 0;
2366 }
2367 caplen -= miclen;
2368 mic_start = p + caplen;
2369 }
2370
2371 /* Parse Information elements if present */
2372 if (ie_present) {
2373 /* Yes we have those. */
2374 len = ieee802_15_4_print_header_ie_list(ndo, p, caplen,
2375 &payload_ie_present);
2376 if (len < 0) {
2377 return 0;
2378 }
2379 p += len;
2380 caplen -= len;
2381 }
2382
2383 if (payload_ie_present) {
2384 if (security_level >= 4) {
2385 ND_PRINT("Payload IEs present, but encrypted, cannot print ");
2386 } else {
2387 len = ieee802_15_4_print_payload_ie_list(ndo, p,
2388 caplen);
2389 if (len < 0) {
2390 return 0;
2391 }
2392 p += len;
2393 caplen -= len;
2394 }
2395 }
2396
2397 /* Print MIC */
2398 if (ndo->ndo_vflag > 2 && miclen != 0) {
2399 ND_PRINT("\n\tMIC ");
2400
2401 for(len = 0; len < miclen; len++) {
2402 ND_PRINT("%02x", GET_U_1(mic_start + len));
2403 }
2404 ND_PRINT(" ");
2405 }
2406
2407
2408 /* Print FCS */
2409 if (ndo->ndo_vflag > 2) {
2410 if (crc_check == fcs) {
2411 ND_PRINT("FCS %x ", fcs);
2412 } else {
2413 ND_PRINT("wrong FCS %x vs %x (assume no FCS stored) ",
2414 fcs, crc_check);
2415 }
2416 }
2417
2418 if (!ndo->ndo_suppress_default_print)
2419 ND_DEFAULTPRINT(p, caplen);
2420
2421 return 1;
2422 }
2423
2424 /*
2425 * Print frag frame.
2426 *
2427 * Returns FALSE in case of error.
2428 */
2429 static u_int
2430 ieee802_15_4_frag_frame(netdissect_options *ndo _U_,
2431 const u_char *p _U_,
2432 u_int caplen _U_,
2433 uint16_t fc _U_)
2434 {
2435 /* Not implement yet, might be bit hard to implement, as the
2436 * information to set up the fragment is coming in the previous frame
2437 * in the Fragment Sequence Context Description IE, thus we need to
2438 * store information from there, so we can use it here. */
2439 return 0;
2440 }
2441
2442 /*
2443 * Interal call to dissector taking packet + len instead of pcap_pkthdr.
2444 *
2445 * Returns FALSE in case of error.
2446 */
2447 u_int
2448 ieee802_15_4_print(netdissect_options *ndo,
2449 const u_char *p, u_int caplen)
2450 {
2451 int frame_type;
2452 uint16_t fc;
2453
2454 ndo->ndo_protocol = "802.15.4";
2455
2456 if (caplen < 2) {
2457 nd_print_trunc(ndo);
2458 return caplen;
2459 }
2460
2461 fc = GET_LE_U_2(p);
2462
2463 /* First we need to check the frame type to know how to parse the rest
2464 of the FC. Frame type is the first 3 bit of the frame control field.
2465 */
2466
2467 frame_type = FC_FRAME_TYPE(fc);
2468 ND_PRINT("IEEE 802.15.4 %s packet ", ftypes[frame_type]);
2469
2470 switch (frame_type) {
2471 case 0x00: /* Beacon */
2472 case 0x01: /* Data */
2473 case 0x02: /* Acknowledgement */
2474 case 0x03: /* MAC Command */
2475 return ieee802_15_4_std_frames(ndo, p, caplen, fc);
2476 break;
2477 case 0x04: /* Reserved */
2478 return 0;
2479 break;
2480 case 0x05: /* Multipurpose */
2481 return ieee802_15_4_mp_frame(ndo, p, caplen, fc);
2482 break;
2483 case 0x06: /* Fragment or Frak */
2484 return ieee802_15_4_frag_frame(ndo, p, caplen, fc);
2485 break;
2486 case 0x07: /* Extended */
2487 return 0;
2488 break;
2489 }
2490 return 0;
2491 }
2492
2493 /*
2494 * Main function to print packets.
2495 */
2496
2497 void
2498 ieee802_15_4_if_print(netdissect_options *ndo,
2499 const struct pcap_pkthdr *h, const u_char *p)
2500 {
2501 u_int caplen = h->caplen;
2502 ndo->ndo_protocol = "802.15.4";
2503 ndo->ndo_ll_hdr_len += ieee802_15_4_print(ndo, p, caplen);
2504 }
2505
2506 /* For DLT_IEEE802_15_4_TAP */
2507 /* https://github.com/jkcko/ieee802.15.4-tap */
2508 void
2509 ieee802_15_4_tap_if_print(netdissect_options *ndo,
2510 const struct pcap_pkthdr *h, const u_char *p)
2511 {
2512 uint8_t version;
2513 uint16_t length;
2514
2515 ndo->ndo_protocol = "802.15.4_tap";
2516 if (h->caplen < 4) {
2517 nd_print_trunc(ndo);
2518 ndo->ndo_ll_hdr_len += h->caplen;
2519 return;
2520 }
2521
2522 version = GET_U_1(p);
2523 length = GET_LE_U_2(p + 2);
2524 if (version != 0 || length < 4) {
2525 nd_print_invalid(ndo);
2526 return;
2527 }
2528
2529 if (h->caplen < length) {
2530 nd_print_trunc(ndo);
2531 ndo->ndo_ll_hdr_len += h->caplen;
2532 return;
2533 }
2534
2535 ndo->ndo_ll_hdr_len += ieee802_15_4_print(ndo, p+length, h->caplen-length) + length;
2536 }
[mirror] the TCPdump network dissector