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[tcpdump] / print-802_11.c
1 /*
2 * Copyright (c) 2001
3 * Fortress Technologies, Inc. All rights reserved.
4 * Charlie Lenahan (clenahan@fortresstech.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 802.11 printer */
24
25 #ifdef HAVE_CONFIG_H
26 #include "config.h"
27 #endif
28
29 #include <netdissect-stdinc.h>
30
31 #include <string.h>
32
33 #include "netdissect.h"
34 #include "addrtoname.h"
35
36 #include "extract.h"
37
38 #include "cpack.h"
39
40
41 /* Lengths of 802.11 header components. */
42 #define IEEE802_11_FC_LEN 2
43 #define IEEE802_11_DUR_LEN 2
44 #define IEEE802_11_DA_LEN 6
45 #define IEEE802_11_SA_LEN 6
46 #define IEEE802_11_BSSID_LEN 6
47 #define IEEE802_11_RA_LEN 6
48 #define IEEE802_11_TA_LEN 6
49 #define IEEE802_11_ADDR1_LEN 6
50 #define IEEE802_11_SEQ_LEN 2
51 #define IEEE802_11_CTL_LEN 2
52 #define IEEE802_11_CARRIED_FC_LEN 2
53 #define IEEE802_11_HT_CONTROL_LEN 4
54 #define IEEE802_11_IV_LEN 3
55 #define IEEE802_11_KID_LEN 1
56
57 /* Frame check sequence length. */
58 #define IEEE802_11_FCS_LEN 4
59
60 /* Lengths of beacon components. */
61 #define IEEE802_11_TSTAMP_LEN 8
62 #define IEEE802_11_BCNINT_LEN 2
63 #define IEEE802_11_CAPINFO_LEN 2
64 #define IEEE802_11_LISTENINT_LEN 2
65
66 #define IEEE802_11_AID_LEN 2
67 #define IEEE802_11_STATUS_LEN 2
68 #define IEEE802_11_REASON_LEN 2
69
70 /* Length of previous AP in reassocation frame */
71 #define IEEE802_11_AP_LEN 6
72
73 #define T_MGMT 0x0 /* management */
74 #define T_CTRL 0x1 /* control */
75 #define T_DATA 0x2 /* data */
76 #define T_RESV 0x3 /* reserved */
77
78 #define ST_ASSOC_REQUEST 0x0
79 #define ST_ASSOC_RESPONSE 0x1
80 #define ST_REASSOC_REQUEST 0x2
81 #define ST_REASSOC_RESPONSE 0x3
82 #define ST_PROBE_REQUEST 0x4
83 #define ST_PROBE_RESPONSE 0x5
84 /* RESERVED 0x6 */
85 /* RESERVED 0x7 */
86 #define ST_BEACON 0x8
87 #define ST_ATIM 0x9
88 #define ST_DISASSOC 0xA
89 #define ST_AUTH 0xB
90 #define ST_DEAUTH 0xC
91 #define ST_ACTION 0xD
92 /* RESERVED 0xE */
93 /* RESERVED 0xF */
94
95 static const struct tok st_str[] = {
96 { ST_ASSOC_REQUEST, "Assoc Request" },
97 { ST_ASSOC_RESPONSE, "Assoc Response" },
98 { ST_REASSOC_REQUEST, "ReAssoc Request" },
99 { ST_REASSOC_RESPONSE, "ReAssoc Response" },
100 { ST_PROBE_REQUEST, "Probe Request" },
101 { ST_PROBE_RESPONSE, "Probe Response" },
102 { ST_BEACON, "Beacon" },
103 { ST_ATIM, "ATIM" },
104 { ST_DISASSOC, "Disassociation" },
105 { ST_AUTH, "Authentication" },
106 { ST_DEAUTH, "DeAuthentication" },
107 { ST_ACTION, "Action" },
108 { 0, NULL }
109 };
110
111 #define CTRL_CONTROL_WRAPPER 0x7
112 #define CTRL_BAR 0x8
113 #define CTRL_BA 0x9
114 #define CTRL_PS_POLL 0xA
115 #define CTRL_RTS 0xB
116 #define CTRL_CTS 0xC
117 #define CTRL_ACK 0xD
118 #define CTRL_CF_END 0xE
119 #define CTRL_END_ACK 0xF
120
121 static const struct tok ctrl_str[] = {
122 { CTRL_CONTROL_WRAPPER, "Control Wrapper" },
123 { CTRL_BAR, "BAR" },
124 { CTRL_BA, "BA" },
125 { CTRL_PS_POLL, "Power Save-Poll" },
126 { CTRL_RTS, "Request-To-Send" },
127 { CTRL_CTS, "Clear-To-Send" },
128 { CTRL_ACK, "Acknowledgment" },
129 { CTRL_CF_END, "CF-End" },
130 { CTRL_END_ACK, "CF-End+CF-Ack" },
131 { 0, NULL }
132 };
133
134 #define DATA_DATA 0x0
135 #define DATA_DATA_CF_ACK 0x1
136 #define DATA_DATA_CF_POLL 0x2
137 #define DATA_DATA_CF_ACK_POLL 0x3
138 #define DATA_NODATA 0x4
139 #define DATA_NODATA_CF_ACK 0x5
140 #define DATA_NODATA_CF_POLL 0x6
141 #define DATA_NODATA_CF_ACK_POLL 0x7
142
143 #define DATA_QOS_DATA 0x8
144 #define DATA_QOS_DATA_CF_ACK 0x9
145 #define DATA_QOS_DATA_CF_POLL 0xA
146 #define DATA_QOS_DATA_CF_ACK_POLL 0xB
147 #define DATA_QOS_NODATA 0xC
148 #define DATA_QOS_CF_POLL_NODATA 0xE
149 #define DATA_QOS_CF_ACK_POLL_NODATA 0xF
150
151 /*
152 * The subtype field of a data frame is, in effect, composed of 4 flag
153 * bits - CF-Ack, CF-Poll, Null (means the frame doesn't actually have
154 * any data), and QoS.
155 */
156 #define DATA_FRAME_IS_CF_ACK(x) ((x) & 0x01)
157 #define DATA_FRAME_IS_CF_POLL(x) ((x) & 0x02)
158 #define DATA_FRAME_IS_NULL(x) ((x) & 0x04)
159 #define DATA_FRAME_IS_QOS(x) ((x) & 0x08)
160
161 /*
162 * Bits in the frame control field.
163 */
164 #define FC_VERSION(fc) ((fc) & 0x3)
165 #define FC_TYPE(fc) (((fc) >> 2) & 0x3)
166 #define FC_SUBTYPE(fc) (((fc) >> 4) & 0xF)
167 #define FC_TO_DS(fc) ((fc) & 0x0100)
168 #define FC_FROM_DS(fc) ((fc) & 0x0200)
169 #define FC_MORE_FLAG(fc) ((fc) & 0x0400)
170 #define FC_RETRY(fc) ((fc) & 0x0800)
171 #define FC_POWER_MGMT(fc) ((fc) & 0x1000)
172 #define FC_MORE_DATA(fc) ((fc) & 0x2000)
173 #define FC_PROTECTED(fc) ((fc) & 0x4000)
174 #define FC_ORDER(fc) ((fc) & 0x8000)
175
176 struct mgmt_header_t {
177 uint16_t fc;
178 uint16_t duration;
179 uint8_t da[IEEE802_11_DA_LEN];
180 uint8_t sa[IEEE802_11_SA_LEN];
181 uint8_t bssid[IEEE802_11_BSSID_LEN];
182 uint16_t seq_ctrl;
183 };
184
185 #define MGMT_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
186 IEEE802_11_DA_LEN+IEEE802_11_SA_LEN+\
187 IEEE802_11_BSSID_LEN+IEEE802_11_SEQ_LEN)
188
189 #define CAPABILITY_ESS(cap) ((cap) & 0x0001)
190 #define CAPABILITY_IBSS(cap) ((cap) & 0x0002)
191 #define CAPABILITY_CFP(cap) ((cap) & 0x0004)
192 #define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008)
193 #define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)
194
195 struct ssid_t {
196 uint8_t element_id;
197 uint8_t length;
198 u_char ssid[33]; /* 32 + 1 for null */
199 };
200
201 struct rates_t {
202 uint8_t element_id;
203 uint8_t length;
204 uint8_t rate[16];
205 };
206
207 struct challenge_t {
208 uint8_t element_id;
209 uint8_t length;
210 uint8_t text[254]; /* 1-253 + 1 for null */
211 };
212
213 struct fh_t {
214 uint8_t element_id;
215 uint8_t length;
216 uint16_t dwell_time;
217 uint8_t hop_set;
218 uint8_t hop_pattern;
219 uint8_t hop_index;
220 };
221
222 struct ds_t {
223 uint8_t element_id;
224 uint8_t length;
225 uint8_t channel;
226 };
227
228 struct cf_t {
229 uint8_t element_id;
230 uint8_t length;
231 uint8_t count;
232 uint8_t period;
233 uint16_t max_duration;
234 uint16_t dur_remaing;
235 };
236
237 struct tim_t {
238 uint8_t element_id;
239 uint8_t length;
240 uint8_t count;
241 uint8_t period;
242 uint8_t bitmap_control;
243 uint8_t bitmap[251];
244 };
245
246 #define E_SSID 0
247 #define E_RATES 1
248 #define E_FH 2
249 #define E_DS 3
250 #define E_CF 4
251 #define E_TIM 5
252 #define E_IBSS 6
253 /* reserved 7 */
254 /* reserved 8 */
255 /* reserved 9 */
256 /* reserved 10 */
257 /* reserved 11 */
258 /* reserved 12 */
259 /* reserved 13 */
260 /* reserved 14 */
261 /* reserved 15 */
262 /* reserved 16 */
263
264 #define E_CHALLENGE 16
265 /* reserved 17 */
266 /* reserved 18 */
267 /* reserved 19 */
268 /* reserved 16 */
269 /* reserved 16 */
270
271
272 struct mgmt_body_t {
273 uint8_t timestamp[IEEE802_11_TSTAMP_LEN];
274 uint16_t beacon_interval;
275 uint16_t listen_interval;
276 uint16_t status_code;
277 uint16_t aid;
278 u_char ap[IEEE802_11_AP_LEN];
279 uint16_t reason_code;
280 uint16_t auth_alg;
281 uint16_t auth_trans_seq_num;
282 int challenge_present;
283 struct challenge_t challenge;
284 uint16_t capability_info;
285 int ssid_present;
286 struct ssid_t ssid;
287 int rates_present;
288 struct rates_t rates;
289 int ds_present;
290 struct ds_t ds;
291 int cf_present;
292 struct cf_t cf;
293 int fh_present;
294 struct fh_t fh;
295 int tim_present;
296 struct tim_t tim;
297 };
298
299 struct ctrl_control_wrapper_hdr_t {
300 uint16_t fc;
301 uint16_t duration;
302 uint8_t addr1[IEEE802_11_ADDR1_LEN];
303 uint16_t carried_fc[IEEE802_11_CARRIED_FC_LEN];
304 uint16_t ht_control[IEEE802_11_HT_CONTROL_LEN];
305 };
306
307 #define CTRL_CONTROL_WRAPPER_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
308 IEEE802_11_ADDR1_LEN+\
309 IEEE802_11_CARRIED_FC_LEN+\
310 IEEE802_11_HT_CONTROL_LEN)
311
312 struct ctrl_rts_hdr_t {
313 uint16_t fc;
314 uint16_t duration;
315 uint8_t ra[IEEE802_11_RA_LEN];
316 uint8_t ta[IEEE802_11_TA_LEN];
317 };
318
319 #define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
320 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN)
321
322 struct ctrl_cts_hdr_t {
323 uint16_t fc;
324 uint16_t duration;
325 uint8_t ra[IEEE802_11_RA_LEN];
326 };
327
328 #define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
329
330 struct ctrl_ack_hdr_t {
331 uint16_t fc;
332 uint16_t duration;
333 uint8_t ra[IEEE802_11_RA_LEN];
334 };
335
336 #define CTRL_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
337
338 struct ctrl_ps_poll_hdr_t {
339 uint16_t fc;
340 uint16_t aid;
341 uint8_t bssid[IEEE802_11_BSSID_LEN];
342 uint8_t ta[IEEE802_11_TA_LEN];
343 };
344
345 #define CTRL_PS_POLL_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_AID_LEN+\
346 IEEE802_11_BSSID_LEN+IEEE802_11_TA_LEN)
347
348 struct ctrl_end_hdr_t {
349 uint16_t fc;
350 uint16_t duration;
351 uint8_t ra[IEEE802_11_RA_LEN];
352 uint8_t bssid[IEEE802_11_BSSID_LEN];
353 };
354
355 #define CTRL_END_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
356 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
357
358 struct ctrl_end_ack_hdr_t {
359 uint16_t fc;
360 uint16_t duration;
361 uint8_t ra[IEEE802_11_RA_LEN];
362 uint8_t bssid[IEEE802_11_BSSID_LEN];
363 };
364
365 #define CTRL_END_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
366 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
367
368 struct ctrl_ba_hdr_t {
369 uint16_t fc;
370 uint16_t duration;
371 uint8_t ra[IEEE802_11_RA_LEN];
372 };
373
374 #define CTRL_BA_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
375
376 struct ctrl_bar_hdr_t {
377 uint16_t fc;
378 uint16_t dur;
379 uint8_t ra[IEEE802_11_RA_LEN];
380 uint8_t ta[IEEE802_11_TA_LEN];
381 uint16_t ctl;
382 uint16_t seq;
383 };
384
385 #define CTRL_BAR_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
386 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN+\
387 IEEE802_11_CTL_LEN+IEEE802_11_SEQ_LEN)
388
389 struct meshcntl_t {
390 uint8_t flags;
391 uint8_t ttl;
392 uint8_t seq[4];
393 uint8_t addr4[6];
394 uint8_t addr5[6];
395 uint8_t addr6[6];
396 };
397
398 #define IV_IV(iv) ((iv) & 0xFFFFFF)
399 #define IV_PAD(iv) (((iv) >> 24) & 0x3F)
400 #define IV_KEYID(iv) (((iv) >> 30) & 0x03)
401
402 #define PRINT_SSID(p) \
403 if (p.ssid_present) { \
404 ND_PRINT((ndo, " (")); \
405 fn_print(ndo, p.ssid.ssid, NULL); \
406 ND_PRINT((ndo, ")")); \
407 }
408
409 #define PRINT_RATE(_sep, _r, _suf) \
410 ND_PRINT((ndo, "%s%2.1f%s", _sep, (.5 * ((_r) & 0x7f)), _suf))
411 #define PRINT_RATES(p) \
412 if (p.rates_present) { \
413 int z; \
414 const char *sep = " ["; \
415 for (z = 0; z < p.rates.length ; z++) { \
416 PRINT_RATE(sep, p.rates.rate[z], \
417 (p.rates.rate[z] & 0x80 ? "*" : "")); \
418 sep = " "; \
419 } \
420 if (p.rates.length != 0) \
421 ND_PRINT((ndo, " Mbit]")); \
422 }
423
424 #define PRINT_DS_CHANNEL(p) \
425 if (p.ds_present) \
426 ND_PRINT((ndo, " CH: %u", p.ds.channel)); \
427 ND_PRINT((ndo, "%s", \
428 CAPABILITY_PRIVACY(p.capability_info) ? ", PRIVACY" : ""));
429
430 #define MAX_MCS_INDEX 76
431
432 /*
433 * Indices are:
434 *
435 * the MCS index (0-76);
436 *
437 * 0 for 20 MHz, 1 for 40 MHz;
438 *
439 * 0 for a long guard interval, 1 for a short guard interval.
440 */
441 static const float ieee80211_float_htrates[MAX_MCS_INDEX+1][2][2] = {
442 /* MCS 0 */
443 { /* 20 Mhz */ { 6.5, /* SGI */ 7.2, },
444 /* 40 Mhz */ { 13.5, /* SGI */ 15.0, },
445 },
446
447 /* MCS 1 */
448 { /* 20 Mhz */ { 13.0, /* SGI */ 14.4, },
449 /* 40 Mhz */ { 27.0, /* SGI */ 30.0, },
450 },
451
452 /* MCS 2 */
453 { /* 20 Mhz */ { 19.5, /* SGI */ 21.7, },
454 /* 40 Mhz */ { 40.5, /* SGI */ 45.0, },
455 },
456
457 /* MCS 3 */
458 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, },
459 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, },
460 },
461
462 /* MCS 4 */
463 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
464 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
465 },
466
467 /* MCS 5 */
468 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
469 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
470 },
471
472 /* MCS 6 */
473 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, },
474 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, },
475 },
476
477 /* MCS 7 */
478 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
479 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
480 },
481
482 /* MCS 8 */
483 { /* 20 Mhz */ { 13.0, /* SGI */ 14.4, },
484 /* 40 Mhz */ { 27.0, /* SGI */ 30.0, },
485 },
486
487 /* MCS 9 */
488 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, },
489 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, },
490 },
491
492 /* MCS 10 */
493 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
494 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
495 },
496
497 /* MCS 11 */
498 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
499 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
500 },
501
502 /* MCS 12 */
503 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
504 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
505 },
506
507 /* MCS 13 */
508 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
509 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
510 },
511
512 /* MCS 14 */
513 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
514 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
515 },
516
517 /* MCS 15 */
518 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, },
519 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, },
520 },
521
522 /* MCS 16 */
523 { /* 20 Mhz */ { 19.5, /* SGI */ 21.7, },
524 /* 40 Mhz */ { 40.5, /* SGI */ 45.0, },
525 },
526
527 /* MCS 17 */
528 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
529 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
530 },
531
532 /* MCS 18 */
533 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, },
534 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, },
535 },
536
537 /* MCS 19 */
538 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
539 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
540 },
541
542 /* MCS 20 */
543 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
544 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
545 },
546
547 /* MCS 21 */
548 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
549 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
550 },
551
552 /* MCS 22 */
553 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, },
554 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, },
555 },
556
557 /* MCS 23 */
558 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, },
559 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, },
560 },
561
562 /* MCS 24 */
563 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, },
564 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, },
565 },
566
567 /* MCS 25 */
568 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
569 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
570 },
571
572 /* MCS 26 */
573 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
574 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
575 },
576
577 /* MCS 27 */
578 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
579 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
580 },
581
582 /* MCS 28 */
583 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
584 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
585 },
586
587 /* MCS 29 */
588 { /* 20 Mhz */ { 208.0, /* SGI */ 231.1, },
589 /* 40 Mhz */ { 432.0, /* SGI */ 480.0, },
590 },
591
592 /* MCS 30 */
593 { /* 20 Mhz */ { 234.0, /* SGI */ 260.0, },
594 /* 40 Mhz */ { 486.0, /* SGI */ 540.0, },
595 },
596
597 /* MCS 31 */
598 { /* 20 Mhz */ { 260.0, /* SGI */ 288.9, },
599 /* 40 Mhz */ { 540.0, /* SGI */ 600.0, },
600 },
601
602 /* MCS 32 */
603 { /* 20 Mhz */ { 0.0, /* SGI */ 0.0, }, /* not valid */
604 /* 40 Mhz */ { 6.0, /* SGI */ 6.7, },
605 },
606
607 /* MCS 33 */
608 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
609 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
610 },
611
612 /* MCS 34 */
613 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
614 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
615 },
616
617 /* MCS 35 */
618 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
619 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
620 },
621
622 /* MCS 36 */
623 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, },
624 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, },
625 },
626
627 /* MCS 37 */
628 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
629 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
630 },
631
632 /* MCS 38 */
633 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
634 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
635 },
636
637 /* MCS 39 */
638 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
639 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
640 },
641
642 /* MCS 40 */
643 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
644 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
645 },
646
647 /* MCS 41 */
648 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
649 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
650 },
651
652 /* MCS 42 */
653 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
654 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
655 },
656
657 /* MCS 43 */
658 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
659 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
660 },
661
662 /* MCS 44 */
663 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
664 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
665 },
666
667 /* MCS 45 */
668 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
669 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
670 },
671
672 /* MCS 46 */
673 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
674 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
675 },
676
677 /* MCS 47 */
678 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
679 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
680 },
681
682 /* MCS 48 */
683 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
684 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
685 },
686
687 /* MCS 49 */
688 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
689 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
690 },
691
692 /* MCS 50 */
693 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
694 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
695 },
696
697 /* MCS 51 */
698 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
699 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
700 },
701
702 /* MCS 52 */
703 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
704 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
705 },
706
707 /* MCS 53 */
708 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
709 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
710 },
711
712 /* MCS 54 */
713 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
714 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
715 },
716
717 /* MCS 55 */
718 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
719 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
720 },
721
722 /* MCS 56 */
723 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
724 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
725 },
726
727 /* MCS 57 */
728 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
729 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
730 },
731
732 /* MCS 58 */
733 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
734 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
735 },
736
737 /* MCS 59 */
738 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
739 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
740 },
741
742 /* MCS 60 */
743 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
744 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
745 },
746
747 /* MCS 61 */
748 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
749 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
750 },
751
752 /* MCS 62 */
753 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, },
754 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, },
755 },
756
757 /* MCS 63 */
758 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, },
759 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, },
760 },
761
762 /* MCS 64 */
763 { /* 20 Mhz */ { 143.0, /* SGI */ 158.9, },
764 /* 40 Mhz */ { 297.0, /* SGI */ 330.0, },
765 },
766
767 /* MCS 65 */
768 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
769 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
770 },
771
772 /* MCS 66 */
773 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
774 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
775 },
776
777 /* MCS 67 */
778 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
779 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
780 },
781
782 /* MCS 68 */
783 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
784 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
785 },
786
787 /* MCS 69 */
788 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
789 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
790 },
791
792 /* MCS 70 */
793 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
794 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
795 },
796
797 /* MCS 71 */
798 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, },
799 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, },
800 },
801
802 /* MCS 72 */
803 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
804 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
805 },
806
807 /* MCS 73 */
808 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, },
809 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, },
810 },
811
812 /* MCS 74 */
813 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, },
814 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, },
815 },
816
817 /* MCS 75 */
818 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, },
819 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, },
820 },
821
822 /* MCS 76 */
823 { /* 20 Mhz */ { 214.5, /* SGI */ 238.3, },
824 /* 40 Mhz */ { 445.5, /* SGI */ 495.0, },
825 },
826 };
827
828 static const char *auth_alg_text[]={"Open System","Shared Key","EAP"};
829 #define NUM_AUTH_ALGS (sizeof auth_alg_text / sizeof auth_alg_text[0])
830
831 static const char *status_text[] = {
832 "Successful", /* 0 */
833 "Unspecified failure", /* 1 */
834 "Reserved", /* 2 */
835 "Reserved", /* 3 */
836 "Reserved", /* 4 */
837 "Reserved", /* 5 */
838 "Reserved", /* 6 */
839 "Reserved", /* 7 */
840 "Reserved", /* 8 */
841 "Reserved", /* 9 */
842 "Cannot Support all requested capabilities in the Capability "
843 "Information field", /* 10 */
844 "Reassociation denied due to inability to confirm that association "
845 "exists", /* 11 */
846 "Association denied due to reason outside the scope of the "
847 "standard", /* 12 */
848 "Responding station does not support the specified authentication "
849 "algorithm ", /* 13 */
850 "Received an Authentication frame with authentication transaction "
851 "sequence number out of expected sequence", /* 14 */
852 "Authentication rejected because of challenge failure", /* 15 */
853 "Authentication rejected due to timeout waiting for next frame in "
854 "sequence", /* 16 */
855 "Association denied because AP is unable to handle additional"
856 "associated stations", /* 17 */
857 "Association denied due to requesting station not supporting all of "
858 "the data rates in BSSBasicRateSet parameter", /* 18 */
859 "Association denied due to requesting station not supporting "
860 "short preamble operation", /* 19 */
861 "Association denied due to requesting station not supporting "
862 "PBCC encoding", /* 20 */
863 "Association denied due to requesting station not supporting "
864 "channel agility", /* 21 */
865 "Association request rejected because Spectrum Management "
866 "capability is required", /* 22 */
867 "Association request rejected because the information in the "
868 "Power Capability element is unacceptable", /* 23 */
869 "Association request rejected because the information in the "
870 "Supported Channels element is unacceptable", /* 24 */
871 "Association denied due to requesting station not supporting "
872 "short slot operation", /* 25 */
873 "Association denied due to requesting station not supporting "
874 "DSSS-OFDM operation", /* 26 */
875 "Association denied because the requested STA does not support HT "
876 "features", /* 27 */
877 "Reserved", /* 28 */
878 "Association denied because the requested STA does not support "
879 "the PCO transition time required by the AP", /* 29 */
880 "Reserved", /* 30 */
881 "Reserved", /* 31 */
882 "Unspecified, QoS-related failure", /* 32 */
883 "Association denied due to QAP having insufficient bandwidth "
884 "to handle another QSTA", /* 33 */
885 "Association denied due to excessive frame loss rates and/or "
886 "poor conditions on current operating channel", /* 34 */
887 "Association (with QBSS) denied due to requesting station not "
888 "supporting the QoS facility", /* 35 */
889 "Association denied due to requesting station not supporting "
890 "Block Ack", /* 36 */
891 "The request has been declined", /* 37 */
892 "The request has not been successful as one or more parameters "
893 "have invalid values", /* 38 */
894 "The TS has not been created because the request cannot be honored. "
895 "Try again with the suggested changes to the TSPEC", /* 39 */
896 "Invalid Information Element", /* 40 */
897 "Group Cipher is not valid", /* 41 */
898 "Pairwise Cipher is not valid", /* 42 */
899 "AKMP is not valid", /* 43 */
900 "Unsupported RSN IE version", /* 44 */
901 "Invalid RSN IE Capabilities", /* 45 */
902 "Cipher suite is rejected per security policy", /* 46 */
903 "The TS has not been created. However, the HC may be capable of "
904 "creating a TS, in response to a request, after the time indicated "
905 "in the TS Delay element", /* 47 */
906 "Direct Link is not allowed in the BSS by policy", /* 48 */
907 "Destination STA is not present within this QBSS.", /* 49 */
908 "The Destination STA is not a QSTA.", /* 50 */
909
910 };
911 #define NUM_STATUSES (sizeof status_text / sizeof status_text[0])
912
913 static const char *reason_text[] = {
914 "Reserved", /* 0 */
915 "Unspecified reason", /* 1 */
916 "Previous authentication no longer valid", /* 2 */
917 "Deauthenticated because sending station is leaving (or has left) "
918 "IBSS or ESS", /* 3 */
919 "Disassociated due to inactivity", /* 4 */
920 "Disassociated because AP is unable to handle all currently "
921 " associated stations", /* 5 */
922 "Class 2 frame received from nonauthenticated station", /* 6 */
923 "Class 3 frame received from nonassociated station", /* 7 */
924 "Disassociated because sending station is leaving "
925 "(or has left) BSS", /* 8 */
926 "Station requesting (re)association is not authenticated with "
927 "responding station", /* 9 */
928 "Disassociated because the information in the Power Capability "
929 "element is unacceptable", /* 10 */
930 "Disassociated because the information in the SupportedChannels "
931 "element is unacceptable", /* 11 */
932 "Invalid Information Element", /* 12 */
933 "Reserved", /* 13 */
934 "Michael MIC failure", /* 14 */
935 "4-Way Handshake timeout", /* 15 */
936 "Group key update timeout", /* 16 */
937 "Information element in 4-Way Handshake different from (Re)Association"
938 "Request/Probe Response/Beacon", /* 17 */
939 "Group Cipher is not valid", /* 18 */
940 "AKMP is not valid", /* 20 */
941 "Unsupported RSN IE version", /* 21 */
942 "Invalid RSN IE Capabilities", /* 22 */
943 "IEEE 802.1X Authentication failed", /* 23 */
944 "Cipher suite is rejected per security policy", /* 24 */
945 "Reserved", /* 25 */
946 "Reserved", /* 26 */
947 "Reserved", /* 27 */
948 "Reserved", /* 28 */
949 "Reserved", /* 29 */
950 "Reserved", /* 30 */
951 "TS deleted because QoS AP lacks sufficient bandwidth for this "
952 "QoS STA due to a change in BSS service characteristics or "
953 "operational mode (e.g. an HT BSS change from 40 MHz channel "
954 "to 20 MHz channel)", /* 31 */
955 "Disassociated for unspecified, QoS-related reason", /* 32 */
956 "Disassociated because QoS AP lacks sufficient bandwidth for this "
957 "QoS STA", /* 33 */
958 "Disassociated because of excessive number of frames that need to be "
959 "acknowledged, but are not acknowledged for AP transmissions "
960 "and/or poor channel conditions", /* 34 */
961 "Disassociated because STA is transmitting outside the limits "
962 "of its TXOPs", /* 35 */
963 "Requested from peer STA as the STA is leaving the BSS "
964 "(or resetting)", /* 36 */
965 "Requested from peer STA as it does not want to use the "
966 "mechanism", /* 37 */
967 "Requested from peer STA as the STA received frames using the "
968 "mechanism for which a set up is required", /* 38 */
969 "Requested from peer STA due to time out", /* 39 */
970 "Reserved", /* 40 */
971 "Reserved", /* 41 */
972 "Reserved", /* 42 */
973 "Reserved", /* 43 */
974 "Reserved", /* 44 */
975 "Peer STA does not support the requested cipher suite", /* 45 */
976 "Association denied due to requesting STA not supporting HT "
977 "features", /* 46 */
978 };
979 #define NUM_REASONS (sizeof reason_text / sizeof reason_text[0])
980
981 static int
982 wep_print(netdissect_options *ndo,
983 const u_char *p)
984 {
985 uint32_t iv;
986
987 if (!ND_TTEST2(*p, IEEE802_11_IV_LEN + IEEE802_11_KID_LEN))
988 return 0;
989 iv = EXTRACT_LE_U_4(p);
990
991 ND_PRINT((ndo, " IV:%3x Pad %x KeyID %x", IV_IV(iv), IV_PAD(iv),
992 IV_KEYID(iv)));
993
994 return 1;
995 }
996
997 static int
998 parse_elements(netdissect_options *ndo,
999 struct mgmt_body_t *pbody, const u_char *p, int offset,
1000 u_int length)
1001 {
1002 u_int elementlen;
1003 struct ssid_t ssid;
1004 struct challenge_t challenge;
1005 struct rates_t rates;
1006 struct ds_t ds;
1007 struct cf_t cf;
1008 struct tim_t tim;
1009
1010 /*
1011 * We haven't seen any elements yet.
1012 */
1013 pbody->challenge_present = 0;
1014 pbody->ssid_present = 0;
1015 pbody->rates_present = 0;
1016 pbody->ds_present = 0;
1017 pbody->cf_present = 0;
1018 pbody->tim_present = 0;
1019
1020 while (length != 0) {
1021 /* Make sure we at least have the element ID and length. */
1022 if (!ND_TTEST_2(p + offset))
1023 return 0;
1024 if (length < 2)
1025 return 0;
1026 elementlen = EXTRACT_U_1(p + offset + 1);
1027
1028 /* Make sure we have the entire element. */
1029 if (!ND_TTEST2(*(p + offset + 2), elementlen))
1030 return 0;
1031 if (length < elementlen + 2)
1032 return 0;
1033
1034 switch (*(p + offset)) {
1035 case E_SSID:
1036 memcpy(&ssid, p + offset, 2);
1037 offset += 2;
1038 length -= 2;
1039 if (ssid.length != 0) {
1040 if (ssid.length > sizeof(ssid.ssid) - 1)
1041 return 0;
1042 memcpy(&ssid.ssid, p + offset, ssid.length);
1043 offset += ssid.length;
1044 length -= ssid.length;
1045 }
1046 ssid.ssid[ssid.length] = '\0';
1047 /*
1048 * Present and not truncated.
1049 *
1050 * If we haven't already seen an SSID IE,
1051 * copy this one, otherwise ignore this one,
1052 * so we later report the first one we saw.
1053 */
1054 if (!pbody->ssid_present) {
1055 pbody->ssid = ssid;
1056 pbody->ssid_present = 1;
1057 }
1058 break;
1059 case E_CHALLENGE:
1060 memcpy(&challenge, p + offset, 2);
1061 offset += 2;
1062 length -= 2;
1063 if (challenge.length != 0) {
1064 if (challenge.length >
1065 sizeof(challenge.text) - 1)
1066 return 0;
1067 memcpy(&challenge.text, p + offset,
1068 challenge.length);
1069 offset += challenge.length;
1070 length -= challenge.length;
1071 }
1072 challenge.text[challenge.length] = '\0';
1073 /*
1074 * Present and not truncated.
1075 *
1076 * If we haven't already seen a challenge IE,
1077 * copy this one, otherwise ignore this one,
1078 * so we later report the first one we saw.
1079 */
1080 if (!pbody->challenge_present) {
1081 pbody->challenge = challenge;
1082 pbody->challenge_present = 1;
1083 }
1084 break;
1085 case E_RATES:
1086 memcpy(&rates, p + offset, 2);
1087 offset += 2;
1088 length -= 2;
1089 if (rates.length != 0) {
1090 if (rates.length > sizeof rates.rate)
1091 return 0;
1092 memcpy(&rates.rate, p + offset, rates.length);
1093 offset += rates.length;
1094 length -= rates.length;
1095 }
1096 /*
1097 * Present and not truncated.
1098 *
1099 * If we haven't already seen a rates IE,
1100 * copy this one if it's not zero-length,
1101 * otherwise ignore this one, so we later
1102 * report the first one we saw.
1103 *
1104 * We ignore zero-length rates IEs as some
1105 * devices seem to put a zero-length rates
1106 * IE, followed by an SSID IE, followed by
1107 * a non-zero-length rates IE into frames,
1108 * even though IEEE Std 802.11-2007 doesn't
1109 * seem to indicate that a zero-length rates
1110 * IE is valid.
1111 */
1112 if (!pbody->rates_present && rates.length != 0) {
1113 pbody->rates = rates;
1114 pbody->rates_present = 1;
1115 }
1116 break;
1117 case E_DS:
1118 memcpy(&ds, p + offset, 2);
1119 offset += 2;
1120 length -= 2;
1121 if (ds.length != 1) {
1122 offset += ds.length;
1123 length -= ds.length;
1124 break;
1125 }
1126 ds.channel = EXTRACT_U_1(p + offset);
1127 offset += 1;
1128 length -= 1;
1129 /*
1130 * Present and not truncated.
1131 *
1132 * If we haven't already seen a DS IE,
1133 * copy this one, otherwise ignore this one,
1134 * so we later report the first one we saw.
1135 */
1136 if (!pbody->ds_present) {
1137 pbody->ds = ds;
1138 pbody->ds_present = 1;
1139 }
1140 break;
1141 case E_CF:
1142 memcpy(&cf, p + offset, 2);
1143 offset += 2;
1144 length -= 2;
1145 if (cf.length != 6) {
1146 offset += cf.length;
1147 length -= cf.length;
1148 break;
1149 }
1150 memcpy(&cf.count, p + offset, 6);
1151 offset += 6;
1152 length -= 6;
1153 /*
1154 * Present and not truncated.
1155 *
1156 * If we haven't already seen a CF IE,
1157 * copy this one, otherwise ignore this one,
1158 * so we later report the first one we saw.
1159 */
1160 if (!pbody->cf_present) {
1161 pbody->cf = cf;
1162 pbody->cf_present = 1;
1163 }
1164 break;
1165 case E_TIM:
1166 memcpy(&tim, p + offset, 2);
1167 offset += 2;
1168 length -= 2;
1169 if (tim.length <= 3U) {
1170 offset += tim.length;
1171 length -= tim.length;
1172 break;
1173 }
1174 if (tim.length - 3U > sizeof tim.bitmap)
1175 return 0;
1176 memcpy(&tim.count, p + offset, 3);
1177 offset += 3;
1178 length -= 3;
1179
1180 memcpy(tim.bitmap, p + offset, tim.length - 3);
1181 offset += tim.length - 3;
1182 length -= tim.length - 3;
1183 /*
1184 * Present and not truncated.
1185 *
1186 * If we haven't already seen a TIM IE,
1187 * copy this one, otherwise ignore this one,
1188 * so we later report the first one we saw.
1189 */
1190 if (!pbody->tim_present) {
1191 pbody->tim = tim;
1192 pbody->tim_present = 1;
1193 }
1194 break;
1195 default:
1196 #if 0
1197 ND_PRINT((ndo, "(1) unhandled element_id (%d) ",
1198 *(p + offset)));
1199 #endif
1200 offset += 2 + elementlen;
1201 length -= 2 + elementlen;
1202 break;
1203 }
1204 }
1205
1206 /* No problems found. */
1207 return 1;
1208 }
1209
1210 /*********************************************************************************
1211 * Print Handle functions for the management frame types
1212 *********************************************************************************/
1213
1214 static int
1215 handle_beacon(netdissect_options *ndo,
1216 const u_char *p, u_int length)
1217 {
1218 struct mgmt_body_t pbody;
1219 int offset = 0;
1220 int ret;
1221
1222 memset(&pbody, 0, sizeof(pbody));
1223
1224 if (!ND_TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1225 IEEE802_11_CAPINFO_LEN))
1226 return 0;
1227 if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1228 IEEE802_11_CAPINFO_LEN)
1229 return 0;
1230 memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
1231 offset += IEEE802_11_TSTAMP_LEN;
1232 length -= IEEE802_11_TSTAMP_LEN;
1233 pbody.beacon_interval = EXTRACT_LE_U_2(p + offset);
1234 offset += IEEE802_11_BCNINT_LEN;
1235 length -= IEEE802_11_BCNINT_LEN;
1236 pbody.capability_info = EXTRACT_LE_U_2(p + offset);
1237 offset += IEEE802_11_CAPINFO_LEN;
1238 length -= IEEE802_11_CAPINFO_LEN;
1239
1240 ret = parse_elements(ndo, &pbody, p, offset, length);
1241
1242 PRINT_SSID(pbody);
1243 PRINT_RATES(pbody);
1244 ND_PRINT((ndo, " %s",
1245 CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS"));
1246 PRINT_DS_CHANNEL(pbody);
1247
1248 return ret;
1249 }
1250
1251 static int
1252 handle_assoc_request(netdissect_options *ndo,
1253 const u_char *p, u_int length)
1254 {
1255 struct mgmt_body_t pbody;
1256 int offset = 0;
1257 int ret;
1258
1259 memset(&pbody, 0, sizeof(pbody));
1260
1261 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN))
1262 return 0;
1263 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN)
1264 return 0;
1265 pbody.capability_info = EXTRACT_LE_U_2(p);
1266 offset += IEEE802_11_CAPINFO_LEN;
1267 length -= IEEE802_11_CAPINFO_LEN;
1268 pbody.listen_interval = EXTRACT_LE_U_2(p + offset);
1269 offset += IEEE802_11_LISTENINT_LEN;
1270 length -= IEEE802_11_LISTENINT_LEN;
1271
1272 ret = parse_elements(ndo, &pbody, p, offset, length);
1273
1274 PRINT_SSID(pbody);
1275 PRINT_RATES(pbody);
1276 return ret;
1277 }
1278
1279 static int
1280 handle_assoc_response(netdissect_options *ndo,
1281 const u_char *p, u_int length)
1282 {
1283 struct mgmt_body_t pbody;
1284 int offset = 0;
1285 int ret;
1286
1287 memset(&pbody, 0, sizeof(pbody));
1288
1289 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN +
1290 IEEE802_11_AID_LEN))
1291 return 0;
1292 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN +
1293 IEEE802_11_AID_LEN)
1294 return 0;
1295 pbody.capability_info = EXTRACT_LE_U_2(p);
1296 offset += IEEE802_11_CAPINFO_LEN;
1297 length -= IEEE802_11_CAPINFO_LEN;
1298 pbody.status_code = EXTRACT_LE_U_2(p + offset);
1299 offset += IEEE802_11_STATUS_LEN;
1300 length -= IEEE802_11_STATUS_LEN;
1301 pbody.aid = EXTRACT_LE_U_2(p + offset);
1302 offset += IEEE802_11_AID_LEN;
1303 length -= IEEE802_11_AID_LEN;
1304
1305 ret = parse_elements(ndo, &pbody, p, offset, length);
1306
1307 ND_PRINT((ndo, " AID(%x) :%s: %s", ((uint16_t)(pbody.aid << 2 )) >> 2 ,
1308 CAPABILITY_PRIVACY(pbody.capability_info) ? " PRIVACY " : "",
1309 (pbody.status_code < NUM_STATUSES
1310 ? status_text[pbody.status_code]
1311 : "n/a")));
1312
1313 return ret;
1314 }
1315
1316 static int
1317 handle_reassoc_request(netdissect_options *ndo,
1318 const u_char *p, u_int length)
1319 {
1320 struct mgmt_body_t pbody;
1321 int offset = 0;
1322 int ret;
1323
1324 memset(&pbody, 0, sizeof(pbody));
1325
1326 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN +
1327 IEEE802_11_AP_LEN))
1328 return 0;
1329 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN +
1330 IEEE802_11_AP_LEN)
1331 return 0;
1332 pbody.capability_info = EXTRACT_LE_U_2(p);
1333 offset += IEEE802_11_CAPINFO_LEN;
1334 length -= IEEE802_11_CAPINFO_LEN;
1335 pbody.listen_interval = EXTRACT_LE_U_2(p + offset);
1336 offset += IEEE802_11_LISTENINT_LEN;
1337 length -= IEEE802_11_LISTENINT_LEN;
1338 memcpy(&pbody.ap, p+offset, IEEE802_11_AP_LEN);
1339 offset += IEEE802_11_AP_LEN;
1340 length -= IEEE802_11_AP_LEN;
1341
1342 ret = parse_elements(ndo, &pbody, p, offset, length);
1343
1344 PRINT_SSID(pbody);
1345 ND_PRINT((ndo, " AP : %s", etheraddr_string(ndo, pbody.ap )));
1346
1347 return ret;
1348 }
1349
1350 static int
1351 handle_reassoc_response(netdissect_options *ndo,
1352 const u_char *p, u_int length)
1353 {
1354 /* Same as a Association Reponse */
1355 return handle_assoc_response(ndo, p, length);
1356 }
1357
1358 static int
1359 handle_probe_request(netdissect_options *ndo,
1360 const u_char *p, u_int length)
1361 {
1362 struct mgmt_body_t pbody;
1363 int offset = 0;
1364 int ret;
1365
1366 memset(&pbody, 0, sizeof(pbody));
1367
1368 ret = parse_elements(ndo, &pbody, p, offset, length);
1369
1370 PRINT_SSID(pbody);
1371 PRINT_RATES(pbody);
1372
1373 return ret;
1374 }
1375
1376 static int
1377 handle_probe_response(netdissect_options *ndo,
1378 const u_char *p, u_int length)
1379 {
1380 struct mgmt_body_t pbody;
1381 int offset = 0;
1382 int ret;
1383
1384 memset(&pbody, 0, sizeof(pbody));
1385
1386 if (!ND_TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1387 IEEE802_11_CAPINFO_LEN))
1388 return 0;
1389 if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1390 IEEE802_11_CAPINFO_LEN)
1391 return 0;
1392 memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
1393 offset += IEEE802_11_TSTAMP_LEN;
1394 length -= IEEE802_11_TSTAMP_LEN;
1395 pbody.beacon_interval = EXTRACT_LE_U_2(p + offset);
1396 offset += IEEE802_11_BCNINT_LEN;
1397 length -= IEEE802_11_BCNINT_LEN;
1398 pbody.capability_info = EXTRACT_LE_U_2(p + offset);
1399 offset += IEEE802_11_CAPINFO_LEN;
1400 length -= IEEE802_11_CAPINFO_LEN;
1401
1402 ret = parse_elements(ndo, &pbody, p, offset, length);
1403
1404 PRINT_SSID(pbody);
1405 PRINT_RATES(pbody);
1406 PRINT_DS_CHANNEL(pbody);
1407
1408 return ret;
1409 }
1410
1411 static int
1412 handle_atim(void)
1413 {
1414 /* the frame body for ATIM is null. */
1415 return 1;
1416 }
1417
1418 static int
1419 handle_disassoc(netdissect_options *ndo,
1420 const u_char *p, u_int length)
1421 {
1422 struct mgmt_body_t pbody;
1423
1424 memset(&pbody, 0, sizeof(pbody));
1425
1426 if (!ND_TTEST2(*p, IEEE802_11_REASON_LEN))
1427 return 0;
1428 if (length < IEEE802_11_REASON_LEN)
1429 return 0;
1430 pbody.reason_code = EXTRACT_LE_U_2(p);
1431
1432 ND_PRINT((ndo, ": %s",
1433 (pbody.reason_code < NUM_REASONS)
1434 ? reason_text[pbody.reason_code]
1435 : "Reserved"));
1436
1437 return 1;
1438 }
1439
1440 static int
1441 handle_auth(netdissect_options *ndo,
1442 const u_char *p, u_int length)
1443 {
1444 struct mgmt_body_t pbody;
1445 int offset = 0;
1446 int ret;
1447
1448 memset(&pbody, 0, sizeof(pbody));
1449
1450 if (!ND_TTEST_6(p))
1451 return 0;
1452 if (length < 6)
1453 return 0;
1454 pbody.auth_alg = EXTRACT_LE_U_2(p);
1455 offset += 2;
1456 length -= 2;
1457 pbody.auth_trans_seq_num = EXTRACT_LE_U_2(p + offset);
1458 offset += 2;
1459 length -= 2;
1460 pbody.status_code = EXTRACT_LE_U_2(p + offset);
1461 offset += 2;
1462 length -= 2;
1463
1464 ret = parse_elements(ndo, &pbody, p, offset, length);
1465
1466 if ((pbody.auth_alg == 1) &&
1467 ((pbody.auth_trans_seq_num == 2) ||
1468 (pbody.auth_trans_seq_num == 3))) {
1469 ND_PRINT((ndo, " (%s)-%x [Challenge Text] %s",
1470 (pbody.auth_alg < NUM_AUTH_ALGS)
1471 ? auth_alg_text[pbody.auth_alg]
1472 : "Reserved",
1473 pbody.auth_trans_seq_num,
1474 ((pbody.auth_trans_seq_num % 2)
1475 ? ((pbody.status_code < NUM_STATUSES)
1476 ? status_text[pbody.status_code]
1477 : "n/a") : "")));
1478 return ret;
1479 }
1480 ND_PRINT((ndo, " (%s)-%x: %s",
1481 (pbody.auth_alg < NUM_AUTH_ALGS)
1482 ? auth_alg_text[pbody.auth_alg]
1483 : "Reserved",
1484 pbody.auth_trans_seq_num,
1485 (pbody.auth_trans_seq_num % 2)
1486 ? ((pbody.status_code < NUM_STATUSES)
1487 ? status_text[pbody.status_code]
1488 : "n/a")
1489 : ""));
1490
1491 return ret;
1492 }
1493
1494 static int
1495 handle_deauth(netdissect_options *ndo,
1496 const uint8_t *src, const u_char *p, u_int length)
1497 {
1498 struct mgmt_body_t pbody;
1499 const char *reason = NULL;
1500
1501 memset(&pbody, 0, sizeof(pbody));
1502
1503 if (!ND_TTEST2(*p, IEEE802_11_REASON_LEN))
1504 return 0;
1505 if (length < IEEE802_11_REASON_LEN)
1506 return 0;
1507 pbody.reason_code = EXTRACT_LE_U_2(p);
1508
1509 reason = (pbody.reason_code < NUM_REASONS)
1510 ? reason_text[pbody.reason_code]
1511 : "Reserved";
1512
1513 if (ndo->ndo_eflag) {
1514 ND_PRINT((ndo, ": %s", reason));
1515 } else {
1516 ND_PRINT((ndo, " (%s): %s", etheraddr_string(ndo, src), reason));
1517 }
1518 return 1;
1519 }
1520
1521 #define PRINT_HT_ACTION(v) (\
1522 (v) == 0 ? ND_PRINT((ndo, "TxChWidth")) : \
1523 (v) == 1 ? ND_PRINT((ndo, "MIMOPwrSave")) : \
1524 ND_PRINT((ndo, "Act#%d", (v))) \
1525 )
1526 #define PRINT_BA_ACTION(v) (\
1527 (v) == 0 ? ND_PRINT((ndo, "ADDBA Request")) : \
1528 (v) == 1 ? ND_PRINT((ndo, "ADDBA Response")) : \
1529 (v) == 2 ? ND_PRINT((ndo, "DELBA")) : \
1530 ND_PRINT((ndo, "Act#%d", (v))) \
1531 )
1532 #define PRINT_MESHLINK_ACTION(v) (\
1533 (v) == 0 ? ND_PRINT((ndo, "Request")) : \
1534 (v) == 1 ? ND_PRINT((ndo, "Report")) : \
1535 ND_PRINT((ndo, "Act#%d", (v))) \
1536 )
1537 #define PRINT_MESHPEERING_ACTION(v) (\
1538 (v) == 0 ? ND_PRINT((ndo, "Open")) : \
1539 (v) == 1 ? ND_PRINT((ndo, "Confirm")) : \
1540 (v) == 2 ? ND_PRINT((ndo, "Close")) : \
1541 ND_PRINT((ndo, "Act#%d", (v))) \
1542 )
1543 #define PRINT_MESHPATH_ACTION(v) (\
1544 (v) == 0 ? ND_PRINT((ndo, "Request")) : \
1545 (v) == 1 ? ND_PRINT((ndo, "Report")) : \
1546 (v) == 2 ? ND_PRINT((ndo, "Error")) : \
1547 (v) == 3 ? ND_PRINT((ndo, "RootAnnouncement")) : \
1548 ND_PRINT((ndo, "Act#%d", (v))) \
1549 )
1550
1551 #define PRINT_MESH_ACTION(v) (\
1552 (v) == 0 ? ND_PRINT((ndo, "MeshLink")) : \
1553 (v) == 1 ? ND_PRINT((ndo, "HWMP")) : \
1554 (v) == 2 ? ND_PRINT((ndo, "Gate Announcement")) : \
1555 (v) == 3 ? ND_PRINT((ndo, "Congestion Control")) : \
1556 (v) == 4 ? ND_PRINT((ndo, "MCCA Setup Request")) : \
1557 (v) == 5 ? ND_PRINT((ndo, "MCCA Setup Reply")) : \
1558 (v) == 6 ? ND_PRINT((ndo, "MCCA Advertisement Request")) : \
1559 (v) == 7 ? ND_PRINT((ndo, "MCCA Advertisement")) : \
1560 (v) == 8 ? ND_PRINT((ndo, "MCCA Teardown")) : \
1561 (v) == 9 ? ND_PRINT((ndo, "TBTT Adjustment Request")) : \
1562 (v) == 10 ? ND_PRINT((ndo, "TBTT Adjustment Response")) : \
1563 ND_PRINT((ndo, "Act#%d", (v))) \
1564 )
1565 #define PRINT_MULTIHOP_ACTION(v) (\
1566 (v) == 0 ? ND_PRINT((ndo, "Proxy Update")) : \
1567 (v) == 1 ? ND_PRINT((ndo, "Proxy Update Confirmation")) : \
1568 ND_PRINT((ndo, "Act#%d", (v))) \
1569 )
1570 #define PRINT_SELFPROT_ACTION(v) (\
1571 (v) == 1 ? ND_PRINT((ndo, "Peering Open")) : \
1572 (v) == 2 ? ND_PRINT((ndo, "Peering Confirm")) : \
1573 (v) == 3 ? ND_PRINT((ndo, "Peering Close")) : \
1574 (v) == 4 ? ND_PRINT((ndo, "Group Key Inform")) : \
1575 (v) == 5 ? ND_PRINT((ndo, "Group Key Acknowledge")) : \
1576 ND_PRINT((ndo, "Act#%d", (v))) \
1577 )
1578
1579 static int
1580 handle_action(netdissect_options *ndo,
1581 const uint8_t *src, const u_char *p, u_int length)
1582 {
1583 if (!ND_TTEST_2(p))
1584 return 0;
1585 if (length < 2)
1586 return 0;
1587 if (ndo->ndo_eflag) {
1588 ND_PRINT((ndo, ": "));
1589 } else {
1590 ND_PRINT((ndo, " (%s): ", etheraddr_string(ndo, src)));
1591 }
1592 switch (EXTRACT_U_1(p)) {
1593 case 0: ND_PRINT((ndo, "Spectrum Management Act#%d", EXTRACT_U_1(p + 1))); break;
1594 case 1: ND_PRINT((ndo, "QoS Act#%d", EXTRACT_U_1(p + 1))); break;
1595 case 2: ND_PRINT((ndo, "DLS Act#%d", EXTRACT_U_1(p + 1))); break;
1596 case 3: ND_PRINT((ndo, "BA ")); PRINT_BA_ACTION(EXTRACT_U_1(p + 1)); break;
1597 case 7: ND_PRINT((ndo, "HT ")); PRINT_HT_ACTION(EXTRACT_U_1(p + 1)); break;
1598 case 13: ND_PRINT((ndo, "MeshAction ")); PRINT_MESH_ACTION(EXTRACT_U_1(p + 1)); break;
1599 case 14:
1600 ND_PRINT((ndo, "MultiohopAction "));
1601 PRINT_MULTIHOP_ACTION(EXTRACT_U_1(p + 1)); break;
1602 case 15:
1603 ND_PRINT((ndo, "SelfprotectAction "));
1604 PRINT_SELFPROT_ACTION(EXTRACT_U_1(p + 1)); break;
1605 case 127: ND_PRINT((ndo, "Vendor Act#%d", EXTRACT_U_1(p + 1))); break;
1606 default:
1607 ND_PRINT((ndo, "Reserved(%d) Act#%d", EXTRACT_U_1(p), EXTRACT_U_1(p + 1)));
1608 break;
1609 }
1610 return 1;
1611 }
1612
1613
1614 /*********************************************************************************
1615 * Print Body funcs
1616 *********************************************************************************/
1617
1618
1619 static int
1620 mgmt_body_print(netdissect_options *ndo,
1621 uint16_t fc, const uint8_t *src, const u_char *p, u_int length)
1622 {
1623 ND_PRINT((ndo, "%s", tok2str(st_str, "Unhandled Management subtype(%x)", FC_SUBTYPE(fc))));
1624
1625 /* There may be a problem w/ AP not having this bit set */
1626 if (FC_PROTECTED(fc))
1627 return wep_print(ndo, p);
1628 switch (FC_SUBTYPE(fc)) {
1629 case ST_ASSOC_REQUEST:
1630 return handle_assoc_request(ndo, p, length);
1631 case ST_ASSOC_RESPONSE:
1632 return handle_assoc_response(ndo, p, length);
1633 case ST_REASSOC_REQUEST:
1634 return handle_reassoc_request(ndo, p, length);
1635 case ST_REASSOC_RESPONSE:
1636 return handle_reassoc_response(ndo, p, length);
1637 case ST_PROBE_REQUEST:
1638 return handle_probe_request(ndo, p, length);
1639 case ST_PROBE_RESPONSE:
1640 return handle_probe_response(ndo, p, length);
1641 case ST_BEACON:
1642 return handle_beacon(ndo, p, length);
1643 case ST_ATIM:
1644 return handle_atim();
1645 case ST_DISASSOC:
1646 return handle_disassoc(ndo, p, length);
1647 case ST_AUTH:
1648 return handle_auth(ndo, p, length);
1649 case ST_DEAUTH:
1650 return handle_deauth(ndo, src, p, length);
1651 case ST_ACTION:
1652 return handle_action(ndo, src, p, length);
1653 default:
1654 return 1;
1655 }
1656 }
1657
1658
1659 /*********************************************************************************
1660 * Handles printing all the control frame types
1661 *********************************************************************************/
1662
1663 static int
1664 ctrl_body_print(netdissect_options *ndo,
1665 uint16_t fc, const u_char *p)
1666 {
1667 ND_PRINT((ndo, "%s", tok2str(ctrl_str, "Unknown Ctrl Subtype", FC_SUBTYPE(fc))));
1668 switch (FC_SUBTYPE(fc)) {
1669 case CTRL_CONTROL_WRAPPER:
1670 /* XXX - requires special handling */
1671 break;
1672 case CTRL_BAR:
1673 if (!ND_TTEST2(*p, CTRL_BAR_HDRLEN))
1674 return 0;
1675 if (!ndo->ndo_eflag)
1676 ND_PRINT((ndo, " RA:%s TA:%s CTL(%x) SEQ(%u) ",
1677 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ra),
1678 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ta),
1679 EXTRACT_LE_U_2(&(((const struct ctrl_bar_hdr_t *)p)->ctl)),
1680 EXTRACT_LE_U_2(&(((const struct ctrl_bar_hdr_t *)p)->seq))));
1681 break;
1682 case CTRL_BA:
1683 if (!ND_TTEST2(*p, CTRL_BA_HDRLEN))
1684 return 0;
1685 if (!ndo->ndo_eflag)
1686 ND_PRINT((ndo, " RA:%s ",
1687 etheraddr_string(ndo, ((const struct ctrl_ba_hdr_t *)p)->ra)));
1688 break;
1689 case CTRL_PS_POLL:
1690 if (!ND_TTEST2(*p, CTRL_PS_POLL_HDRLEN))
1691 return 0;
1692 ND_PRINT((ndo, " AID(%x)",
1693 EXTRACT_LE_U_2(&(((const struct ctrl_ps_poll_hdr_t *)p)->aid))));
1694 break;
1695 case CTRL_RTS:
1696 if (!ND_TTEST2(*p, CTRL_RTS_HDRLEN))
1697 return 0;
1698 if (!ndo->ndo_eflag)
1699 ND_PRINT((ndo, " TA:%s ",
1700 etheraddr_string(ndo, ((const struct ctrl_rts_hdr_t *)p)->ta)));
1701 break;
1702 case CTRL_CTS:
1703 if (!ND_TTEST2(*p, CTRL_CTS_HDRLEN))
1704 return 0;
1705 if (!ndo->ndo_eflag)
1706 ND_PRINT((ndo, " RA:%s ",
1707 etheraddr_string(ndo, ((const struct ctrl_cts_hdr_t *)p)->ra)));
1708 break;
1709 case CTRL_ACK:
1710 if (!ND_TTEST2(*p, CTRL_ACK_HDRLEN))
1711 return 0;
1712 if (!ndo->ndo_eflag)
1713 ND_PRINT((ndo, " RA:%s ",
1714 etheraddr_string(ndo, ((const struct ctrl_ack_hdr_t *)p)->ra)));
1715 break;
1716 case CTRL_CF_END:
1717 if (!ND_TTEST2(*p, CTRL_END_HDRLEN))
1718 return 0;
1719 if (!ndo->ndo_eflag)
1720 ND_PRINT((ndo, " RA:%s ",
1721 etheraddr_string(ndo, ((const struct ctrl_end_hdr_t *)p)->ra)));
1722 break;
1723 case CTRL_END_ACK:
1724 if (!ND_TTEST2(*p, CTRL_END_ACK_HDRLEN))
1725 return 0;
1726 if (!ndo->ndo_eflag)
1727 ND_PRINT((ndo, " RA:%s ",
1728 etheraddr_string(ndo, ((const struct ctrl_end_ack_hdr_t *)p)->ra)));
1729 break;
1730 }
1731 return 1;
1732 }
1733
1734 /*
1735 * Data Frame - Address field contents
1736 *
1737 * To Ds | From DS | Addr 1 | Addr 2 | Addr 3 | Addr 4
1738 * 0 | 0 | DA | SA | BSSID | n/a
1739 * 0 | 1 | DA | BSSID | SA | n/a
1740 * 1 | 0 | BSSID | SA | DA | n/a
1741 * 1 | 1 | RA | TA | DA | SA
1742 */
1743
1744 /*
1745 * Function to get source and destination MAC addresses for a data frame.
1746 */
1747 static void
1748 get_data_src_dst_mac(uint16_t fc, const u_char *p, const uint8_t **srcp,
1749 const uint8_t **dstp)
1750 {
1751 #define ADDR1 (p + 4)
1752 #define ADDR2 (p + 10)
1753 #define ADDR3 (p + 16)
1754 #define ADDR4 (p + 24)
1755
1756 if (!FC_TO_DS(fc)) {
1757 if (!FC_FROM_DS(fc)) {
1758 /* not To DS and not From DS */
1759 *srcp = ADDR2;
1760 *dstp = ADDR1;
1761 } else {
1762 /* not To DS and From DS */
1763 *srcp = ADDR3;
1764 *dstp = ADDR1;
1765 }
1766 } else {
1767 if (!FC_FROM_DS(fc)) {
1768 /* From DS and not To DS */
1769 *srcp = ADDR2;
1770 *dstp = ADDR3;
1771 } else {
1772 /* To DS and From DS */
1773 *srcp = ADDR4;
1774 *dstp = ADDR3;
1775 }
1776 }
1777
1778 #undef ADDR1
1779 #undef ADDR2
1780 #undef ADDR3
1781 #undef ADDR4
1782 }
1783
1784 static void
1785 get_mgmt_src_dst_mac(const u_char *p, const uint8_t **srcp, const uint8_t **dstp)
1786 {
1787 const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p;
1788
1789 if (srcp != NULL)
1790 *srcp = hp->sa;
1791 if (dstp != NULL)
1792 *dstp = hp->da;
1793 }
1794
1795 /*
1796 * Print Header funcs
1797 */
1798
1799 static void
1800 data_header_print(netdissect_options *ndo, uint16_t fc, const u_char *p)
1801 {
1802 u_int subtype = FC_SUBTYPE(fc);
1803
1804 if (DATA_FRAME_IS_CF_ACK(subtype) || DATA_FRAME_IS_CF_POLL(subtype) ||
1805 DATA_FRAME_IS_QOS(subtype)) {
1806 ND_PRINT((ndo, "CF "));
1807 if (DATA_FRAME_IS_CF_ACK(subtype)) {
1808 if (DATA_FRAME_IS_CF_POLL(subtype))
1809 ND_PRINT((ndo, "Ack/Poll"));
1810 else
1811 ND_PRINT((ndo, "Ack"));
1812 } else {
1813 if (DATA_FRAME_IS_CF_POLL(subtype))
1814 ND_PRINT((ndo, "Poll"));
1815 }
1816 if (DATA_FRAME_IS_QOS(subtype))
1817 ND_PRINT((ndo, "+QoS"));
1818 ND_PRINT((ndo, " "));
1819 }
1820
1821 #define ADDR1 (p + 4)
1822 #define ADDR2 (p + 10)
1823 #define ADDR3 (p + 16)
1824 #define ADDR4 (p + 24)
1825
1826 if (!FC_TO_DS(fc) && !FC_FROM_DS(fc)) {
1827 ND_PRINT((ndo, "DA:%s SA:%s BSSID:%s ",
1828 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1829 etheraddr_string(ndo, ADDR3)));
1830 } else if (!FC_TO_DS(fc) && FC_FROM_DS(fc)) {
1831 ND_PRINT((ndo, "DA:%s BSSID:%s SA:%s ",
1832 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1833 etheraddr_string(ndo, ADDR3)));
1834 } else if (FC_TO_DS(fc) && !FC_FROM_DS(fc)) {
1835 ND_PRINT((ndo, "BSSID:%s SA:%s DA:%s ",
1836 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1837 etheraddr_string(ndo, ADDR3)));
1838 } else if (FC_TO_DS(fc) && FC_FROM_DS(fc)) {
1839 ND_PRINT((ndo, "RA:%s TA:%s DA:%s SA:%s ",
1840 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1841 etheraddr_string(ndo, ADDR3), etheraddr_string(ndo, ADDR4)));
1842 }
1843
1844 #undef ADDR1
1845 #undef ADDR2
1846 #undef ADDR3
1847 #undef ADDR4
1848 }
1849
1850 static void
1851 mgmt_header_print(netdissect_options *ndo, const u_char *p)
1852 {
1853 const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p;
1854
1855 ND_PRINT((ndo, "BSSID:%s DA:%s SA:%s ",
1856 etheraddr_string(ndo, (hp)->bssid), etheraddr_string(ndo, (hp)->da),
1857 etheraddr_string(ndo, (hp)->sa)));
1858 }
1859
1860 static void
1861 ctrl_header_print(netdissect_options *ndo, uint16_t fc, const u_char *p)
1862 {
1863 switch (FC_SUBTYPE(fc)) {
1864 case CTRL_BAR:
1865 ND_PRINT((ndo, " RA:%s TA:%s CTL(%x) SEQ(%u) ",
1866 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ra),
1867 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ta),
1868 EXTRACT_LE_U_2(&(((const struct ctrl_bar_hdr_t *)p)->ctl)),
1869 EXTRACT_LE_U_2(&(((const struct ctrl_bar_hdr_t *)p)->seq))));
1870 break;
1871 case CTRL_BA:
1872 ND_PRINT((ndo, "RA:%s ",
1873 etheraddr_string(ndo, ((const struct ctrl_ba_hdr_t *)p)->ra)));
1874 break;
1875 case CTRL_PS_POLL:
1876 ND_PRINT((ndo, "BSSID:%s TA:%s ",
1877 etheraddr_string(ndo, ((const struct ctrl_ps_poll_hdr_t *)p)->bssid),
1878 etheraddr_string(ndo, ((const struct ctrl_ps_poll_hdr_t *)p)->ta)));
1879 break;
1880 case CTRL_RTS:
1881 ND_PRINT((ndo, "RA:%s TA:%s ",
1882 etheraddr_string(ndo, ((const struct ctrl_rts_hdr_t *)p)->ra),
1883 etheraddr_string(ndo, ((const struct ctrl_rts_hdr_t *)p)->ta)));
1884 break;
1885 case CTRL_CTS:
1886 ND_PRINT((ndo, "RA:%s ",
1887 etheraddr_string(ndo, ((const struct ctrl_cts_hdr_t *)p)->ra)));
1888 break;
1889 case CTRL_ACK:
1890 ND_PRINT((ndo, "RA:%s ",
1891 etheraddr_string(ndo, ((const struct ctrl_ack_hdr_t *)p)->ra)));
1892 break;
1893 case CTRL_CF_END:
1894 ND_PRINT((ndo, "RA:%s BSSID:%s ",
1895 etheraddr_string(ndo, ((const struct ctrl_end_hdr_t *)p)->ra),
1896 etheraddr_string(ndo, ((const struct ctrl_end_hdr_t *)p)->bssid)));
1897 break;
1898 case CTRL_END_ACK:
1899 ND_PRINT((ndo, "RA:%s BSSID:%s ",
1900 etheraddr_string(ndo, ((const struct ctrl_end_ack_hdr_t *)p)->ra),
1901 etheraddr_string(ndo, ((const struct ctrl_end_ack_hdr_t *)p)->bssid)));
1902 break;
1903 default:
1904 /* We shouldn't get here - we should already have quit */
1905 break;
1906 }
1907 }
1908
1909 static int
1910 extract_header_length(netdissect_options *ndo,
1911 uint16_t fc)
1912 {
1913 int len;
1914
1915 switch (FC_TYPE(fc)) {
1916 case T_MGMT:
1917 return MGMT_HDRLEN;
1918 case T_CTRL:
1919 switch (FC_SUBTYPE(fc)) {
1920 case CTRL_CONTROL_WRAPPER:
1921 return CTRL_CONTROL_WRAPPER_HDRLEN;
1922 case CTRL_BAR:
1923 return CTRL_BAR_HDRLEN;
1924 case CTRL_BA:
1925 return CTRL_BA_HDRLEN;
1926 case CTRL_PS_POLL:
1927 return CTRL_PS_POLL_HDRLEN;
1928 case CTRL_RTS:
1929 return CTRL_RTS_HDRLEN;
1930 case CTRL_CTS:
1931 return CTRL_CTS_HDRLEN;
1932 case CTRL_ACK:
1933 return CTRL_ACK_HDRLEN;
1934 case CTRL_CF_END:
1935 return CTRL_END_HDRLEN;
1936 case CTRL_END_ACK:
1937 return CTRL_END_ACK_HDRLEN;
1938 default:
1939 ND_PRINT((ndo, "unknown 802.11 ctrl frame subtype (%d)", FC_SUBTYPE(fc)));
1940 return 0;
1941 }
1942 case T_DATA:
1943 len = (FC_TO_DS(fc) && FC_FROM_DS(fc)) ? 30 : 24;
1944 if (DATA_FRAME_IS_QOS(FC_SUBTYPE(fc)))
1945 len += 2;
1946 return len;
1947 default:
1948 ND_PRINT((ndo, "unknown 802.11 frame type (%d)", FC_TYPE(fc)));
1949 return 0;
1950 }
1951 }
1952
1953 static int
1954 extract_mesh_header_length(const u_char *p)
1955 {
1956 return (p[0] &~ 3) ? 0 : 6*(1 + (p[0] & 3));
1957 }
1958
1959 /*
1960 * Print the 802.11 MAC header.
1961 */
1962 static void
1963 ieee_802_11_hdr_print(netdissect_options *ndo,
1964 uint16_t fc, const u_char *p, u_int hdrlen,
1965 u_int meshdrlen)
1966 {
1967 if (ndo->ndo_vflag) {
1968 if (FC_MORE_DATA(fc))
1969 ND_PRINT((ndo, "More Data "));
1970 if (FC_MORE_FLAG(fc))
1971 ND_PRINT((ndo, "More Fragments "));
1972 if (FC_POWER_MGMT(fc))
1973 ND_PRINT((ndo, "Pwr Mgmt "));
1974 if (FC_RETRY(fc))
1975 ND_PRINT((ndo, "Retry "));
1976 if (FC_ORDER(fc))
1977 ND_PRINT((ndo, "Strictly Ordered "));
1978 if (FC_PROTECTED(fc))
1979 ND_PRINT((ndo, "Protected "));
1980 if (FC_TYPE(fc) != T_CTRL || FC_SUBTYPE(fc) != CTRL_PS_POLL)
1981 ND_PRINT((ndo, "%dus ",
1982 EXTRACT_LE_U_2(&((const struct mgmt_header_t *)p)->duration)));
1983 }
1984 if (meshdrlen != 0) {
1985 const struct meshcntl_t *mc =
1986 (const struct meshcntl_t *)&p[hdrlen - meshdrlen];
1987 int ae = mc->flags & 3;
1988
1989 ND_PRINT((ndo, "MeshData (AE %d TTL %u seq %u", ae, mc->ttl,
1990 EXTRACT_LE_U_4(mc->seq)));
1991 if (ae > 0)
1992 ND_PRINT((ndo, " A4:%s", etheraddr_string(ndo, mc->addr4)));
1993 if (ae > 1)
1994 ND_PRINT((ndo, " A5:%s", etheraddr_string(ndo, mc->addr5)));
1995 if (ae > 2)
1996 ND_PRINT((ndo, " A6:%s", etheraddr_string(ndo, mc->addr6)));
1997 ND_PRINT((ndo, ") "));
1998 }
1999
2000 switch (FC_TYPE(fc)) {
2001 case T_MGMT:
2002 mgmt_header_print(ndo, p);
2003 break;
2004 case T_CTRL:
2005 ctrl_header_print(ndo, fc, p);
2006 break;
2007 case T_DATA:
2008 data_header_print(ndo, fc, p);
2009 break;
2010 default:
2011 break;
2012 }
2013 }
2014
2015 #ifndef roundup2
2016 #define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
2017 #endif
2018
2019 static const char tstr[] = "[|802.11]";
2020
2021 static u_int
2022 ieee802_11_print(netdissect_options *ndo,
2023 const u_char *p, u_int length, u_int orig_caplen, int pad,
2024 u_int fcslen)
2025 {
2026 uint16_t fc;
2027 u_int caplen, hdrlen, meshdrlen;
2028 struct lladdr_info src, dst;
2029 int llc_hdrlen;
2030
2031 caplen = orig_caplen;
2032 /* Remove FCS, if present */
2033 if (length < fcslen) {
2034 ND_PRINT((ndo, "%s", tstr));
2035 return caplen;
2036 }
2037 length -= fcslen;
2038 if (caplen > length) {
2039 /* Amount of FCS in actual packet data, if any */
2040 fcslen = caplen - length;
2041 caplen -= fcslen;
2042 ndo->ndo_snapend -= fcslen;
2043 }
2044
2045 if (caplen < IEEE802_11_FC_LEN) {
2046 ND_PRINT((ndo, "%s", tstr));
2047 return orig_caplen;
2048 }
2049
2050 fc = EXTRACT_LE_U_2(p);
2051 hdrlen = extract_header_length(ndo, fc);
2052 if (hdrlen == 0) {
2053 /* Unknown frame type or control frame subtype; quit. */
2054 return (0);
2055 }
2056 if (pad)
2057 hdrlen = roundup2(hdrlen, 4);
2058 if (ndo->ndo_Hflag && FC_TYPE(fc) == T_DATA &&
2059 DATA_FRAME_IS_QOS(FC_SUBTYPE(fc))) {
2060 meshdrlen = extract_mesh_header_length(p+hdrlen);
2061 hdrlen += meshdrlen;
2062 } else
2063 meshdrlen = 0;
2064
2065 if (caplen < hdrlen) {
2066 ND_PRINT((ndo, "%s", tstr));
2067 return hdrlen;
2068 }
2069
2070 if (ndo->ndo_eflag)
2071 ieee_802_11_hdr_print(ndo, fc, p, hdrlen, meshdrlen);
2072
2073 /*
2074 * Go past the 802.11 header.
2075 */
2076 length -= hdrlen;
2077 caplen -= hdrlen;
2078 p += hdrlen;
2079
2080 src.addr_string = etheraddr_string;
2081 dst.addr_string = etheraddr_string;
2082 switch (FC_TYPE(fc)) {
2083 case T_MGMT:
2084 get_mgmt_src_dst_mac(p - hdrlen, &src.addr, &dst.addr);
2085 if (!mgmt_body_print(ndo, fc, src.addr, p, length)) {
2086 ND_PRINT((ndo, "%s", tstr));
2087 return hdrlen;
2088 }
2089 break;
2090 case T_CTRL:
2091 if (!ctrl_body_print(ndo, fc, p - hdrlen)) {
2092 ND_PRINT((ndo, "%s", tstr));
2093 return hdrlen;
2094 }
2095 break;
2096 case T_DATA:
2097 if (DATA_FRAME_IS_NULL(FC_SUBTYPE(fc)))
2098 return hdrlen; /* no-data frame */
2099 /* There may be a problem w/ AP not having this bit set */
2100 if (FC_PROTECTED(fc)) {
2101 ND_PRINT((ndo, "Data"));
2102 if (!wep_print(ndo, p)) {
2103 ND_PRINT((ndo, "%s", tstr));
2104 return hdrlen;
2105 }
2106 } else {
2107 get_data_src_dst_mac(fc, p - hdrlen, &src.addr, &dst.addr);
2108 llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst);
2109 if (llc_hdrlen < 0) {
2110 /*
2111 * Some kinds of LLC packet we cannot
2112 * handle intelligently
2113 */
2114 if (!ndo->ndo_suppress_default_print)
2115 ND_DEFAULTPRINT(p, caplen);
2116 llc_hdrlen = -llc_hdrlen;
2117 }
2118 hdrlen += llc_hdrlen;
2119 }
2120 break;
2121 default:
2122 /* We shouldn't get here - we should already have quit */
2123 break;
2124 }
2125
2126 return hdrlen;
2127 }
2128
2129 /*
2130 * This is the top level routine of the printer. 'p' points
2131 * to the 802.11 header of the packet, 'h->ts' is the timestamp,
2132 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
2133 * is the number of bytes actually captured.
2134 */
2135 u_int
2136 ieee802_11_if_print(netdissect_options *ndo,
2137 const struct pcap_pkthdr *h, const u_char *p)
2138 {
2139 return ieee802_11_print(ndo, p, h->len, h->caplen, 0, 0);
2140 }
2141
2142
2143 /* $FreeBSD: src/sys/net80211/ieee80211_radiotap.h,v 1.5 2005/01/22 20:12:05 sam Exp $ */
2144 /* NetBSD: ieee802_11_radio.h,v 1.2 2006/02/26 03:04:03 dyoung Exp */
2145
2146 /*-
2147 * Copyright (c) 2003, 2004 David Young. All rights reserved.
2148 *
2149 * Redistribution and use in source and binary forms, with or without
2150 * modification, are permitted provided that the following conditions
2151 * are met:
2152 * 1. Redistributions of source code must retain the above copyright
2153 * notice, this list of conditions and the following disclaimer.
2154 * 2. Redistributions in binary form must reproduce the above copyright
2155 * notice, this list of conditions and the following disclaimer in the
2156 * documentation and/or other materials provided with the distribution.
2157 * 3. The name of David Young may not be used to endorse or promote
2158 * products derived from this software without specific prior
2159 * written permission.
2160 *
2161 * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
2162 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
2163 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
2164 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID
2165 * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
2166 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
2167 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
2168 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
2169 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
2170 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2171 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
2172 * OF SUCH DAMAGE.
2173 */
2174
2175 /* A generic radio capture format is desirable. It must be
2176 * rigidly defined (e.g., units for fields should be given),
2177 * and easily extensible.
2178 *
2179 * The following is an extensible radio capture format. It is
2180 * based on a bitmap indicating which fields are present.
2181 *
2182 * I am trying to describe precisely what the application programmer
2183 * should expect in the following, and for that reason I tell the
2184 * units and origin of each measurement (where it applies), or else I
2185 * use sufficiently weaselly language ("is a monotonically nondecreasing
2186 * function of...") that I cannot set false expectations for lawyerly
2187 * readers.
2188 */
2189
2190 /*
2191 * The radio capture header precedes the 802.11 header.
2192 *
2193 * Note well: all radiotap fields are little-endian.
2194 */
2195 struct ieee80211_radiotap_header {
2196 uint8_t it_version; /* Version 0. Only increases
2197 * for drastic changes,
2198 * introduction of compatible
2199 * new fields does not count.
2200 */
2201 uint8_t it_pad;
2202 uint16_t it_len; /* length of the whole
2203 * header in bytes, including
2204 * it_version, it_pad,
2205 * it_len, and data fields.
2206 */
2207 uint32_t it_present; /* A bitmap telling which
2208 * fields are present. Set bit 31
2209 * (0x80000000) to extend the
2210 * bitmap by another 32 bits.
2211 * Additional extensions are made
2212 * by setting bit 31.
2213 */
2214 };
2215
2216 /* Name Data type Units
2217 * ---- --------- -----
2218 *
2219 * IEEE80211_RADIOTAP_TSFT uint64_t microseconds
2220 *
2221 * Value in microseconds of the MAC's 64-bit 802.11 Time
2222 * Synchronization Function timer when the first bit of the
2223 * MPDU arrived at the MAC. For received frames, only.
2224 *
2225 * IEEE80211_RADIOTAP_CHANNEL 2 x uint16_t MHz, bitmap
2226 *
2227 * Tx/Rx frequency in MHz, followed by flags (see below).
2228 * Note that IEEE80211_RADIOTAP_XCHANNEL must be used to
2229 * represent an HT channel as there is not enough room in
2230 * the flags word.
2231 *
2232 * IEEE80211_RADIOTAP_FHSS uint16_t see below
2233 *
2234 * For frequency-hopping radios, the hop set (first byte)
2235 * and pattern (second byte).
2236 *
2237 * IEEE80211_RADIOTAP_RATE uint8_t 500kb/s or index
2238 *
2239 * Tx/Rx data rate. If bit 0x80 is set then it represents an
2240 * an MCS index and not an IEEE rate.
2241 *
2242 * IEEE80211_RADIOTAP_DBM_ANTSIGNAL int8_t decibels from
2243 * one milliwatt (dBm)
2244 *
2245 * RF signal power at the antenna, decibel difference from
2246 * one milliwatt.
2247 *
2248 * IEEE80211_RADIOTAP_DBM_ANTNOISE int8_t decibels from
2249 * one milliwatt (dBm)
2250 *
2251 * RF noise power at the antenna, decibel difference from one
2252 * milliwatt.
2253 *
2254 * IEEE80211_RADIOTAP_DB_ANTSIGNAL uint8_t decibel (dB)
2255 *
2256 * RF signal power at the antenna, decibel difference from an
2257 * arbitrary, fixed reference.
2258 *
2259 * IEEE80211_RADIOTAP_DB_ANTNOISE uint8_t decibel (dB)
2260 *
2261 * RF noise power at the antenna, decibel difference from an
2262 * arbitrary, fixed reference point.
2263 *
2264 * IEEE80211_RADIOTAP_LOCK_QUALITY uint16_t unitless
2265 *
2266 * Quality of Barker code lock. Unitless. Monotonically
2267 * nondecreasing with "better" lock strength. Called "Signal
2268 * Quality" in datasheets. (Is there a standard way to measure
2269 * this?)
2270 *
2271 * IEEE80211_RADIOTAP_TX_ATTENUATION uint16_t unitless
2272 *
2273 * Transmit power expressed as unitless distance from max
2274 * power set at factory calibration. 0 is max power.
2275 * Monotonically nondecreasing with lower power levels.
2276 *
2277 * IEEE80211_RADIOTAP_DB_TX_ATTENUATION uint16_t decibels (dB)
2278 *
2279 * Transmit power expressed as decibel distance from max power
2280 * set at factory calibration. 0 is max power. Monotonically
2281 * nondecreasing with lower power levels.
2282 *
2283 * IEEE80211_RADIOTAP_DBM_TX_POWER int8_t decibels from
2284 * one milliwatt (dBm)
2285 *
2286 * Transmit power expressed as dBm (decibels from a 1 milliwatt
2287 * reference). This is the absolute power level measured at
2288 * the antenna port.
2289 *
2290 * IEEE80211_RADIOTAP_FLAGS uint8_t bitmap
2291 *
2292 * Properties of transmitted and received frames. See flags
2293 * defined below.
2294 *
2295 * IEEE80211_RADIOTAP_ANTENNA uint8_t antenna index
2296 *
2297 * Unitless indication of the Rx/Tx antenna for this packet.
2298 * The first antenna is antenna 0.
2299 *
2300 * IEEE80211_RADIOTAP_RX_FLAGS uint16_t bitmap
2301 *
2302 * Properties of received frames. See flags defined below.
2303 *
2304 * IEEE80211_RADIOTAP_XCHANNEL uint32_t bitmap
2305 * uint16_t MHz
2306 * uint8_t channel number
2307 * uint8_t .5 dBm
2308 *
2309 * Extended channel specification: flags (see below) followed by
2310 * frequency in MHz, the corresponding IEEE channel number, and
2311 * finally the maximum regulatory transmit power cap in .5 dBm
2312 * units. This property supersedes IEEE80211_RADIOTAP_CHANNEL
2313 * and only one of the two should be present.
2314 *
2315 * IEEE80211_RADIOTAP_MCS uint8_t known
2316 * uint8_t flags
2317 * uint8_t mcs
2318 *
2319 * Bitset indicating which fields have known values, followed
2320 * by bitset of flag values, followed by the MCS rate index as
2321 * in IEEE 802.11n.
2322 *
2323 *
2324 * IEEE80211_RADIOTAP_AMPDU_STATUS u32, u16, u8, u8 unitless
2325 *
2326 * Contains the AMPDU information for the subframe.
2327 *
2328 * IEEE80211_RADIOTAP_VHT u16, u8, u8, u8[4], u8, u8, u16
2329 *
2330 * Contains VHT information about this frame.
2331 *
2332 * IEEE80211_RADIOTAP_VENDOR_NAMESPACE
2333 * uint8_t OUI[3]
2334 * uint8_t subspace
2335 * uint16_t length
2336 *
2337 * The Vendor Namespace Field contains three sub-fields. The first
2338 * sub-field is 3 bytes long. It contains the vendor's IEEE 802
2339 * Organizationally Unique Identifier (OUI). The fourth byte is a
2340 * vendor-specific "namespace selector."
2341 *
2342 */
2343 enum ieee80211_radiotap_type {
2344 IEEE80211_RADIOTAP_TSFT = 0,
2345 IEEE80211_RADIOTAP_FLAGS = 1,
2346 IEEE80211_RADIOTAP_RATE = 2,
2347 IEEE80211_RADIOTAP_CHANNEL = 3,
2348 IEEE80211_RADIOTAP_FHSS = 4,
2349 IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5,
2350 IEEE80211_RADIOTAP_DBM_ANTNOISE = 6,
2351 IEEE80211_RADIOTAP_LOCK_QUALITY = 7,
2352 IEEE80211_RADIOTAP_TX_ATTENUATION = 8,
2353 IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9,
2354 IEEE80211_RADIOTAP_DBM_TX_POWER = 10,
2355 IEEE80211_RADIOTAP_ANTENNA = 11,
2356 IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
2357 IEEE80211_RADIOTAP_DB_ANTNOISE = 13,
2358 IEEE80211_RADIOTAP_RX_FLAGS = 14,
2359 /* NB: gap for netbsd definitions */
2360 IEEE80211_RADIOTAP_XCHANNEL = 18,
2361 IEEE80211_RADIOTAP_MCS = 19,
2362 IEEE80211_RADIOTAP_AMPDU_STATUS = 20,
2363 IEEE80211_RADIOTAP_VHT = 21,
2364 IEEE80211_RADIOTAP_NAMESPACE = 29,
2365 IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30,
2366 IEEE80211_RADIOTAP_EXT = 31
2367 };
2368
2369 /* channel attributes */
2370 #define IEEE80211_CHAN_TURBO 0x00010 /* Turbo channel */
2371 #define IEEE80211_CHAN_CCK 0x00020 /* CCK channel */
2372 #define IEEE80211_CHAN_OFDM 0x00040 /* OFDM channel */
2373 #define IEEE80211_CHAN_2GHZ 0x00080 /* 2 GHz spectrum channel. */
2374 #define IEEE80211_CHAN_5GHZ 0x00100 /* 5 GHz spectrum channel */
2375 #define IEEE80211_CHAN_PASSIVE 0x00200 /* Only passive scan allowed */
2376 #define IEEE80211_CHAN_DYN 0x00400 /* Dynamic CCK-OFDM channel */
2377 #define IEEE80211_CHAN_GFSK 0x00800 /* GFSK channel (FHSS PHY) */
2378 #define IEEE80211_CHAN_GSM 0x01000 /* 900 MHz spectrum channel */
2379 #define IEEE80211_CHAN_STURBO 0x02000 /* 11a static turbo channel only */
2380 #define IEEE80211_CHAN_HALF 0x04000 /* Half rate channel */
2381 #define IEEE80211_CHAN_QUARTER 0x08000 /* Quarter rate channel */
2382 #define IEEE80211_CHAN_HT20 0x10000 /* HT 20 channel */
2383 #define IEEE80211_CHAN_HT40U 0x20000 /* HT 40 channel w/ ext above */
2384 #define IEEE80211_CHAN_HT40D 0x40000 /* HT 40 channel w/ ext below */
2385
2386 /* Useful combinations of channel characteristics, borrowed from Ethereal */
2387 #define IEEE80211_CHAN_A \
2388 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM)
2389 #define IEEE80211_CHAN_B \
2390 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK)
2391 #define IEEE80211_CHAN_G \
2392 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN)
2393 #define IEEE80211_CHAN_TA \
2394 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO)
2395 #define IEEE80211_CHAN_TG \
2396 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN | IEEE80211_CHAN_TURBO)
2397
2398
2399 /* For IEEE80211_RADIOTAP_FLAGS */
2400 #define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received
2401 * during CFP
2402 */
2403 #define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received
2404 * with short
2405 * preamble
2406 */
2407 #define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received
2408 * with WEP encryption
2409 */
2410 #define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received
2411 * with fragmentation
2412 */
2413 #define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */
2414 #define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between
2415 * 802.11 header and payload
2416 * (to 32-bit boundary)
2417 */
2418 #define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* does not pass FCS check */
2419
2420 /* For IEEE80211_RADIOTAP_RX_FLAGS */
2421 #define IEEE80211_RADIOTAP_F_RX_BADFCS 0x0001 /* frame failed crc check */
2422 #define IEEE80211_RADIOTAP_F_RX_PLCP_CRC 0x0002 /* frame failed PLCP CRC check */
2423
2424 /* For IEEE80211_RADIOTAP_MCS known */
2425 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN 0x01
2426 #define IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN 0x02 /* MCS index field */
2427 #define IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN 0x04
2428 #define IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN 0x08
2429 #define IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN 0x10
2430 #define IEEE80211_RADIOTAP_MCS_STBC_KNOWN 0x20
2431 #define IEEE80211_RADIOTAP_MCS_NESS_KNOWN 0x40
2432 #define IEEE80211_RADIOTAP_MCS_NESS_BIT_1 0x80
2433
2434 /* For IEEE80211_RADIOTAP_MCS flags */
2435 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK 0x03
2436 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20 0
2437 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 1
2438 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20L 2
2439 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20U 3
2440 #define IEEE80211_RADIOTAP_MCS_SHORT_GI 0x04 /* short guard interval */
2441 #define IEEE80211_RADIOTAP_MCS_HT_GREENFIELD 0x08
2442 #define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10
2443 #define IEEE80211_RADIOTAP_MCS_STBC_MASK 0x60
2444 #define IEEE80211_RADIOTAP_MCS_STBC_1 1
2445 #define IEEE80211_RADIOTAP_MCS_STBC_2 2
2446 #define IEEE80211_RADIOTAP_MCS_STBC_3 3
2447 #define IEEE80211_RADIOTAP_MCS_STBC_SHIFT 5
2448 #define IEEE80211_RADIOTAP_MCS_NESS_BIT_0 0x80
2449
2450 /* For IEEE80211_RADIOTAP_AMPDU_STATUS */
2451 #define IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN 0x0001
2452 #define IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN 0x0002
2453 #define IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN 0x0004
2454 #define IEEE80211_RADIOTAP_AMPDU_IS_LAST 0x0008
2455 #define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR 0x0010
2456 #define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN 0x0020
2457
2458 /* For IEEE80211_RADIOTAP_VHT known */
2459 #define IEEE80211_RADIOTAP_VHT_STBC_KNOWN 0x0001
2460 #define IEEE80211_RADIOTAP_VHT_TXOP_PS_NA_KNOWN 0x0002
2461 #define IEEE80211_RADIOTAP_VHT_GUARD_INTERVAL_KNOWN 0x0004
2462 #define IEEE80211_RADIOTAP_VHT_SGI_NSYM_DIS_KNOWN 0x0008
2463 #define IEEE80211_RADIOTAP_VHT_LDPC_EXTRA_OFDM_SYM_KNOWN 0x0010
2464 #define IEEE80211_RADIOTAP_VHT_BEAMFORMED_KNOWN 0x0020
2465 #define IEEE80211_RADIOTAP_VHT_BANDWIDTH_KNOWN 0x0040
2466 #define IEEE80211_RADIOTAP_VHT_GROUP_ID_KNOWN 0x0080
2467 #define IEEE80211_RADIOTAP_VHT_PARTIAL_AID_KNOWN 0x0100
2468
2469 /* For IEEE80211_RADIOTAP_VHT flags */
2470 #define IEEE80211_RADIOTAP_VHT_STBC 0x01
2471 #define IEEE80211_RADIOTAP_VHT_TXOP_PS_NA 0x02
2472 #define IEEE80211_RADIOTAP_VHT_SHORT_GI 0x04
2473 #define IEEE80211_RADIOTAP_VHT_SGI_NSYM_M10_9 0x08
2474 #define IEEE80211_RADIOTAP_VHT_LDPC_EXTRA_OFDM_SYM 0x10
2475 #define IEEE80211_RADIOTAP_VHT_BEAMFORMED 0x20
2476
2477 #define IEEE80211_RADIOTAP_VHT_BANDWIDTH_MASK 0x1f
2478
2479 #define IEEE80211_RADIOTAP_VHT_NSS_MASK 0x0f
2480 #define IEEE80211_RADIOTAP_VHT_MCS_MASK 0xf0
2481 #define IEEE80211_RADIOTAP_VHT_MCS_SHIFT 4
2482
2483 #define IEEE80211_RADIOTAP_CODING_LDPC_USERn 0x01
2484
2485 #define IEEE80211_CHAN_FHSS \
2486 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_GFSK)
2487 #define IEEE80211_CHAN_A \
2488 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM)
2489 #define IEEE80211_CHAN_B \
2490 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK)
2491 #define IEEE80211_CHAN_PUREG \
2492 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM)
2493 #define IEEE80211_CHAN_G \
2494 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN)
2495
2496 #define IS_CHAN_FHSS(flags) \
2497 ((flags & IEEE80211_CHAN_FHSS) == IEEE80211_CHAN_FHSS)
2498 #define IS_CHAN_A(flags) \
2499 ((flags & IEEE80211_CHAN_A) == IEEE80211_CHAN_A)
2500 #define IS_CHAN_B(flags) \
2501 ((flags & IEEE80211_CHAN_B) == IEEE80211_CHAN_B)
2502 #define IS_CHAN_PUREG(flags) \
2503 ((flags & IEEE80211_CHAN_PUREG) == IEEE80211_CHAN_PUREG)
2504 #define IS_CHAN_G(flags) \
2505 ((flags & IEEE80211_CHAN_G) == IEEE80211_CHAN_G)
2506 #define IS_CHAN_ANYG(flags) \
2507 (IS_CHAN_PUREG(flags) || IS_CHAN_G(flags))
2508
2509 static void
2510 print_chaninfo(netdissect_options *ndo,
2511 uint16_t freq, int flags, int presentflags)
2512 {
2513 ND_PRINT((ndo, "%u MHz", freq));
2514 if (presentflags & (1 << IEEE80211_RADIOTAP_MCS)) {
2515 /*
2516 * We have the MCS field, so this is 11n, regardless
2517 * of what the channel flags say.
2518 */
2519 ND_PRINT((ndo, " 11n"));
2520 } else {
2521 if (IS_CHAN_FHSS(flags))
2522 ND_PRINT((ndo, " FHSS"));
2523 if (IS_CHAN_A(flags)) {
2524 if (flags & IEEE80211_CHAN_HALF)
2525 ND_PRINT((ndo, " 11a/10Mhz"));
2526 else if (flags & IEEE80211_CHAN_QUARTER)
2527 ND_PRINT((ndo, " 11a/5Mhz"));
2528 else
2529 ND_PRINT((ndo, " 11a"));
2530 }
2531 if (IS_CHAN_ANYG(flags)) {
2532 if (flags & IEEE80211_CHAN_HALF)
2533 ND_PRINT((ndo, " 11g/10Mhz"));
2534 else if (flags & IEEE80211_CHAN_QUARTER)
2535 ND_PRINT((ndo, " 11g/5Mhz"));
2536 else
2537 ND_PRINT((ndo, " 11g"));
2538 } else if (IS_CHAN_B(flags))
2539 ND_PRINT((ndo, " 11b"));
2540 if (flags & IEEE80211_CHAN_TURBO)
2541 ND_PRINT((ndo, " Turbo"));
2542 }
2543 /*
2544 * These apply to 11n.
2545 */
2546 if (flags & IEEE80211_CHAN_HT20)
2547 ND_PRINT((ndo, " ht/20"));
2548 else if (flags & IEEE80211_CHAN_HT40D)
2549 ND_PRINT((ndo, " ht/40-"));
2550 else if (flags & IEEE80211_CHAN_HT40U)
2551 ND_PRINT((ndo, " ht/40+"));
2552 ND_PRINT((ndo, " "));
2553 }
2554
2555 static int
2556 print_radiotap_field(netdissect_options *ndo,
2557 struct cpack_state *s, uint32_t bit, uint8_t *flagsp,
2558 uint32_t presentflags)
2559 {
2560 u_int i;
2561 int rc;
2562
2563 switch (bit) {
2564
2565 case IEEE80211_RADIOTAP_TSFT: {
2566 uint64_t tsft;
2567
2568 rc = cpack_uint64(s, &tsft);
2569 if (rc != 0)
2570 goto trunc;
2571 ND_PRINT((ndo, "%" PRIu64 "us tsft ", tsft));
2572 break;
2573 }
2574
2575 case IEEE80211_RADIOTAP_FLAGS: {
2576 uint8_t flagsval;
2577
2578 rc = cpack_uint8(s, &flagsval);
2579 if (rc != 0)
2580 goto trunc;
2581 *flagsp = flagsval;
2582 if (flagsval & IEEE80211_RADIOTAP_F_CFP)
2583 ND_PRINT((ndo, "cfp "));
2584 if (flagsval & IEEE80211_RADIOTAP_F_SHORTPRE)
2585 ND_PRINT((ndo, "short preamble "));
2586 if (flagsval & IEEE80211_RADIOTAP_F_WEP)
2587 ND_PRINT((ndo, "wep "));
2588 if (flagsval & IEEE80211_RADIOTAP_F_FRAG)
2589 ND_PRINT((ndo, "fragmented "));
2590 if (flagsval & IEEE80211_RADIOTAP_F_BADFCS)
2591 ND_PRINT((ndo, "bad-fcs "));
2592 break;
2593 }
2594
2595 case IEEE80211_RADIOTAP_RATE: {
2596 uint8_t rate;
2597
2598 rc = cpack_uint8(s, &rate);
2599 if (rc != 0)
2600 goto trunc;
2601 /*
2602 * XXX On FreeBSD rate & 0x80 means we have an MCS. On
2603 * Linux and AirPcap it does not. (What about
2604 * Mac OS X, NetBSD, OpenBSD, and DragonFly BSD?)
2605 *
2606 * This is an issue either for proprietary extensions
2607 * to 11a or 11g, which do exist, or for 11n
2608 * implementations that stuff a rate value into
2609 * this field, which also appear to exist.
2610 *
2611 * We currently handle that by assuming that
2612 * if the 0x80 bit is set *and* the remaining
2613 * bits have a value between 0 and 15 it's
2614 * an MCS value, otherwise it's a rate. If
2615 * there are cases where systems that use
2616 * "0x80 + MCS index" for MCS indices > 15,
2617 * or stuff a rate value here between 64 and
2618 * 71.5 Mb/s in here, we'll need a preference
2619 * setting. Such rates do exist, e.g. 11n
2620 * MCS 7 at 20 MHz with a long guard interval.
2621 */
2622 if (rate >= 0x80 && rate <= 0x8f) {
2623 /*
2624 * XXX - we don't know the channel width
2625 * or guard interval length, so we can't
2626 * convert this to a data rate.
2627 *
2628 * If you want us to show a data rate,
2629 * use the MCS field, not the Rate field;
2630 * the MCS field includes not only the
2631 * MCS index, it also includes bandwidth
2632 * and guard interval information.
2633 *
2634 * XXX - can we get the channel width
2635 * from XChannel and the guard interval
2636 * information from Flags, at least on
2637 * FreeBSD?
2638 */
2639 ND_PRINT((ndo, "MCS %u ", rate & 0x7f));
2640 } else
2641 ND_PRINT((ndo, "%2.1f Mb/s ", .5 * rate));
2642 break;
2643 }
2644
2645 case IEEE80211_RADIOTAP_CHANNEL: {
2646 uint16_t frequency;
2647 uint16_t flags;
2648
2649 rc = cpack_uint16(s, &frequency);
2650 if (rc != 0)
2651 goto trunc;
2652 rc = cpack_uint16(s, &flags);
2653 if (rc != 0)
2654 goto trunc;
2655 /*
2656 * If CHANNEL and XCHANNEL are both present, skip
2657 * CHANNEL.
2658 */
2659 if (presentflags & (1 << IEEE80211_RADIOTAP_XCHANNEL))
2660 break;
2661 print_chaninfo(ndo, frequency, flags, presentflags);
2662 break;
2663 }
2664
2665 case IEEE80211_RADIOTAP_FHSS: {
2666 uint8_t hopset;
2667 uint8_t hoppat;
2668
2669 rc = cpack_uint8(s, &hopset);
2670 if (rc != 0)
2671 goto trunc;
2672 rc = cpack_uint8(s, &hoppat);
2673 if (rc != 0)
2674 goto trunc;
2675 ND_PRINT((ndo, "fhset %d fhpat %d ", hopset, hoppat));
2676 break;
2677 }
2678
2679 case IEEE80211_RADIOTAP_DBM_ANTSIGNAL: {
2680 int8_t dbm_antsignal;
2681
2682 rc = cpack_int8(s, &dbm_antsignal);
2683 if (rc != 0)
2684 goto trunc;
2685 ND_PRINT((ndo, "%ddBm signal ", dbm_antsignal));
2686 break;
2687 }
2688
2689 case IEEE80211_RADIOTAP_DBM_ANTNOISE: {
2690 int8_t dbm_antnoise;
2691
2692 rc = cpack_int8(s, &dbm_antnoise);
2693 if (rc != 0)
2694 goto trunc;
2695 ND_PRINT((ndo, "%ddBm noise ", dbm_antnoise));
2696 break;
2697 }
2698
2699 case IEEE80211_RADIOTAP_LOCK_QUALITY: {
2700 uint16_t lock_quality;
2701
2702 rc = cpack_uint16(s, &lock_quality);
2703 if (rc != 0)
2704 goto trunc;
2705 ND_PRINT((ndo, "%u sq ", lock_quality));
2706 break;
2707 }
2708
2709 case IEEE80211_RADIOTAP_TX_ATTENUATION: {
2710 int16_t tx_attenuation;
2711
2712 rc = cpack_int16(s, &tx_attenuation);
2713 if (rc != 0)
2714 goto trunc;
2715 ND_PRINT((ndo, "%d tx power ", -tx_attenuation));
2716 break;
2717 }
2718
2719 case IEEE80211_RADIOTAP_DB_TX_ATTENUATION: {
2720 int8_t db_tx_attenuation;
2721
2722 rc = cpack_int8(s, &db_tx_attenuation);
2723 if (rc != 0)
2724 goto trunc;
2725 ND_PRINT((ndo, "%ddB tx attenuation ", -db_tx_attenuation));
2726 break;
2727 }
2728
2729 case IEEE80211_RADIOTAP_DBM_TX_POWER: {
2730 int8_t dbm_tx_power;
2731
2732 rc = cpack_int8(s, &dbm_tx_power);
2733 if (rc != 0)
2734 goto trunc;
2735 ND_PRINT((ndo, "%ddBm tx power ", dbm_tx_power));
2736 break;
2737 }
2738
2739 case IEEE80211_RADIOTAP_ANTENNA: {
2740 uint8_t antenna;
2741
2742 rc = cpack_uint8(s, &antenna);
2743 if (rc != 0)
2744 goto trunc;
2745 ND_PRINT((ndo, "antenna %u ", antenna));
2746 break;
2747 }
2748
2749 case IEEE80211_RADIOTAP_DB_ANTSIGNAL: {
2750 uint8_t db_antsignal;
2751
2752 rc = cpack_uint8(s, &db_antsignal);
2753 if (rc != 0)
2754 goto trunc;
2755 ND_PRINT((ndo, "%ddB signal ", db_antsignal));
2756 break;
2757 }
2758
2759 case IEEE80211_RADIOTAP_DB_ANTNOISE: {
2760 uint8_t db_antnoise;
2761
2762 rc = cpack_uint8(s, &db_antnoise);
2763 if (rc != 0)
2764 goto trunc;
2765 ND_PRINT((ndo, "%ddB noise ", db_antnoise));
2766 break;
2767 }
2768
2769 case IEEE80211_RADIOTAP_RX_FLAGS: {
2770 uint16_t rx_flags;
2771
2772 rc = cpack_uint16(s, &rx_flags);
2773 if (rc != 0)
2774 goto trunc;
2775 /* Do nothing for now */
2776 break;
2777 }
2778
2779 case IEEE80211_RADIOTAP_XCHANNEL: {
2780 uint32_t flags;
2781 uint16_t frequency;
2782 uint8_t channel;
2783 uint8_t maxpower;
2784
2785 rc = cpack_uint32(s, &flags);
2786 if (rc != 0)
2787 goto trunc;
2788 rc = cpack_uint16(s, &frequency);
2789 if (rc != 0)
2790 goto trunc;
2791 rc = cpack_uint8(s, &channel);
2792 if (rc != 0)
2793 goto trunc;
2794 rc = cpack_uint8(s, &maxpower);
2795 if (rc != 0)
2796 goto trunc;
2797 print_chaninfo(ndo, frequency, flags, presentflags);
2798 break;
2799 }
2800
2801 case IEEE80211_RADIOTAP_MCS: {
2802 uint8_t known;
2803 uint8_t flags;
2804 uint8_t mcs_index;
2805 static const char *ht_bandwidth[4] = {
2806 "20 MHz",
2807 "40 MHz",
2808 "20 MHz (L)",
2809 "20 MHz (U)"
2810 };
2811 float htrate;
2812
2813 rc = cpack_uint8(s, &known);
2814 if (rc != 0)
2815 goto trunc;
2816 rc = cpack_uint8(s, &flags);
2817 if (rc != 0)
2818 goto trunc;
2819 rc = cpack_uint8(s, &mcs_index);
2820 if (rc != 0)
2821 goto trunc;
2822 if (known & IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN) {
2823 /*
2824 * We know the MCS index.
2825 */
2826 if (mcs_index <= MAX_MCS_INDEX) {
2827 /*
2828 * And it's in-range.
2829 */
2830 if (known & (IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN|IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN)) {
2831 /*
2832 * And we know both the bandwidth and
2833 * the guard interval, so we can look
2834 * up the rate.
2835 */
2836 htrate =
2837 ieee80211_float_htrates \
2838 [mcs_index] \
2839 [((flags & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK) == IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 ? 1 : 0)] \
2840 [((flags & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? 1 : 0)];
2841 } else {
2842 /*
2843 * We don't know both the bandwidth
2844 * and the guard interval, so we can
2845 * only report the MCS index.
2846 */
2847 htrate = 0.0;
2848 }
2849 } else {
2850 /*
2851 * The MCS value is out of range.
2852 */
2853 htrate = 0.0;
2854 }
2855 if (htrate != 0.0) {
2856 /*
2857 * We have the rate.
2858 * Print it.
2859 */
2860 ND_PRINT((ndo, "%.1f Mb/s MCS %u ", htrate, mcs_index));
2861 } else {
2862 /*
2863 * We at least have the MCS index.
2864 * Print it.
2865 */
2866 ND_PRINT((ndo, "MCS %u ", mcs_index));
2867 }
2868 }
2869 if (known & IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN) {
2870 ND_PRINT((ndo, "%s ",
2871 ht_bandwidth[flags & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK]));
2872 }
2873 if (known & IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN) {
2874 ND_PRINT((ndo, "%s GI ",
2875 (flags & IEEE80211_RADIOTAP_MCS_SHORT_GI) ?
2876 "short" : "long"));
2877 }
2878 if (known & IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN) {
2879 ND_PRINT((ndo, "%s ",
2880 (flags & IEEE80211_RADIOTAP_MCS_HT_GREENFIELD) ?
2881 "greenfield" : "mixed"));
2882 }
2883 if (known & IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN) {
2884 ND_PRINT((ndo, "%s FEC ",
2885 (flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC) ?
2886 "LDPC" : "BCC"));
2887 }
2888 if (known & IEEE80211_RADIOTAP_MCS_STBC_KNOWN) {
2889 ND_PRINT((ndo, "RX-STBC%u ",
2890 (flags & IEEE80211_RADIOTAP_MCS_STBC_MASK) >> IEEE80211_RADIOTAP_MCS_STBC_SHIFT));
2891 }
2892 break;
2893 }
2894
2895 case IEEE80211_RADIOTAP_AMPDU_STATUS: {
2896 uint32_t reference_num;
2897 uint16_t flags;
2898 uint8_t delim_crc;
2899 uint8_t reserved;
2900
2901 rc = cpack_uint32(s, &reference_num);
2902 if (rc != 0)
2903 goto trunc;
2904 rc = cpack_uint16(s, &flags);
2905 if (rc != 0)
2906 goto trunc;
2907 rc = cpack_uint8(s, &delim_crc);
2908 if (rc != 0)
2909 goto trunc;
2910 rc = cpack_uint8(s, &reserved);
2911 if (rc != 0)
2912 goto trunc;
2913 /* Do nothing for now */
2914 break;
2915 }
2916
2917 case IEEE80211_RADIOTAP_VHT: {
2918 uint16_t known;
2919 uint8_t flags;
2920 uint8_t bandwidth;
2921 uint8_t mcs_nss[4];
2922 uint8_t coding;
2923 uint8_t group_id;
2924 uint16_t partial_aid;
2925 static const char *vht_bandwidth[32] = {
2926 "20 MHz",
2927 "40 MHz",
2928 "20 MHz (L)",
2929 "20 MHz (U)",
2930 "80 MHz",
2931 "80 MHz (L)",
2932 "80 MHz (U)",
2933 "80 MHz (LL)",
2934 "80 MHz (LU)",
2935 "80 MHz (UL)",
2936 "80 MHz (UU)",
2937 "160 MHz",
2938 "160 MHz (L)",
2939 "160 MHz (U)",
2940 "160 MHz (LL)",
2941 "160 MHz (LU)",
2942 "160 MHz (UL)",
2943 "160 MHz (UU)",
2944 "160 MHz (LLL)",
2945 "160 MHz (LLU)",
2946 "160 MHz (LUL)",
2947 "160 MHz (UUU)",
2948 "160 MHz (ULL)",
2949 "160 MHz (ULU)",
2950 "160 MHz (UUL)",
2951 "160 MHz (UUU)",
2952 "unknown (26)",
2953 "unknown (27)",
2954 "unknown (28)",
2955 "unknown (29)",
2956 "unknown (30)",
2957 "unknown (31)"
2958 };
2959
2960 rc = cpack_uint16(s, &known);
2961 if (rc != 0)
2962 goto trunc;
2963 rc = cpack_uint8(s, &flags);
2964 if (rc != 0)
2965 goto trunc;
2966 rc = cpack_uint8(s, &bandwidth);
2967 if (rc != 0)
2968 goto trunc;
2969 for (i = 0; i < 4; i++) {
2970 rc = cpack_uint8(s, &mcs_nss[i]);
2971 if (rc != 0)
2972 goto trunc;
2973 }
2974 rc = cpack_uint8(s, &coding);
2975 if (rc != 0)
2976 goto trunc;
2977 rc = cpack_uint8(s, &group_id);
2978 if (rc != 0)
2979 goto trunc;
2980 rc = cpack_uint16(s, &partial_aid);
2981 if (rc != 0)
2982 goto trunc;
2983 for (i = 0; i < 4; i++) {
2984 u_int nss, mcs;
2985 nss = mcs_nss[i] & IEEE80211_RADIOTAP_VHT_NSS_MASK;
2986 mcs = (mcs_nss[i] & IEEE80211_RADIOTAP_VHT_MCS_MASK) >> IEEE80211_RADIOTAP_VHT_MCS_SHIFT;
2987
2988 if (nss == 0)
2989 continue;
2990
2991 ND_PRINT((ndo, "User %u MCS %u ", i, mcs));
2992 ND_PRINT((ndo, "%s FEC ",
2993 (coding & (IEEE80211_RADIOTAP_CODING_LDPC_USERn << i)) ?
2994 "LDPC" : "BCC"));
2995 }
2996 if (known & IEEE80211_RADIOTAP_VHT_BANDWIDTH_KNOWN) {
2997 ND_PRINT((ndo, "%s ",
2998 vht_bandwidth[bandwidth & IEEE80211_RADIOTAP_VHT_BANDWIDTH_MASK]));
2999 }
3000 if (known & IEEE80211_RADIOTAP_VHT_GUARD_INTERVAL_KNOWN) {
3001 ND_PRINT((ndo, "%s GI ",
3002 (flags & IEEE80211_RADIOTAP_VHT_SHORT_GI) ?
3003 "short" : "long"));
3004 }
3005 break;
3006 }
3007
3008 default:
3009 /* this bit indicates a field whose
3010 * size we do not know, so we cannot
3011 * proceed. Just print the bit number.
3012 */
3013 ND_PRINT((ndo, "[bit %u] ", bit));
3014 return -1;
3015 }
3016
3017 return 0;
3018
3019 trunc:
3020 ND_PRINT((ndo, "%s", tstr));
3021 return rc;
3022 }
3023
3024
3025 static int
3026 print_in_radiotap_namespace(netdissect_options *ndo,
3027 struct cpack_state *s, uint8_t *flags,
3028 uint32_t presentflags, int bit0)
3029 {
3030 #define BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x)))
3031 #define BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x)))
3032 #define BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x)))
3033 #define BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x)))
3034 #define BITNO_2(x) (((x) & 2) ? 1 : 0)
3035 uint32_t present, next_present;
3036 int bitno;
3037 enum ieee80211_radiotap_type bit;
3038 int rc;
3039
3040 for (present = presentflags; present; present = next_present) {
3041 /*
3042 * Clear the least significant bit that is set.
3043 */
3044 next_present = present & (present - 1);
3045
3046 /*
3047 * Get the bit number, within this presence word,
3048 * of the remaining least significant bit that
3049 * is set.
3050 */
3051 bitno = BITNO_32(present ^ next_present);
3052
3053 /*
3054 * Stop if this is one of the "same meaning
3055 * in all presence flags" bits.
3056 */
3057 if (bitno >= IEEE80211_RADIOTAP_NAMESPACE)
3058 break;
3059
3060 /*
3061 * Get the radiotap bit number of that bit.
3062 */
3063 bit = (enum ieee80211_radiotap_type)(bit0 + bitno);
3064
3065 rc = print_radiotap_field(ndo, s, bit, flags, presentflags);
3066 if (rc != 0)
3067 return rc;
3068 }
3069
3070 return 0;
3071 }
3072
3073 static u_int
3074 ieee802_11_radio_print(netdissect_options *ndo,
3075 const u_char *p, u_int length, u_int caplen)
3076 {
3077 #define BIT(n) (1U << n)
3078 #define IS_EXTENDED(__p) \
3079 (EXTRACT_LE_U_4(__p) & BIT(IEEE80211_RADIOTAP_EXT)) != 0
3080
3081 struct cpack_state cpacker;
3082 const struct ieee80211_radiotap_header *hdr;
3083 uint32_t presentflags;
3084 const uint32_t *presentp, *last_presentp;
3085 int vendor_namespace;
3086 uint8_t vendor_oui[3];
3087 uint8_t vendor_subnamespace;
3088 uint16_t skip_length;
3089 int bit0;
3090 u_int len;
3091 uint8_t flags;
3092 int pad;
3093 u_int fcslen;
3094
3095 if (caplen < sizeof(*hdr)) {
3096 ND_PRINT((ndo, "%s", tstr));
3097 return caplen;
3098 }
3099
3100 hdr = (const struct ieee80211_radiotap_header *)p;
3101
3102 len = EXTRACT_LE_U_2(&hdr->it_len);
3103
3104 /*
3105 * If we don't have the entire radiotap header, just give up.
3106 */
3107 if (caplen < len) {
3108 ND_PRINT((ndo, "%s", tstr));
3109 return caplen;
3110 }
3111 cpack_init(&cpacker, (const uint8_t *)hdr, len); /* align against header start */
3112 cpack_advance(&cpacker, sizeof(*hdr)); /* includes the 1st bitmap */
3113 for (last_presentp = &hdr->it_present;
3114 (const u_char*)(last_presentp + 1) <= p + len &&
3115 IS_EXTENDED(last_presentp);
3116 last_presentp++)
3117 cpack_advance(&cpacker, sizeof(hdr->it_present)); /* more bitmaps */
3118
3119 /* are there more bitmap extensions than bytes in header? */
3120 if ((const u_char*)(last_presentp + 1) > p + len) {
3121 ND_PRINT((ndo, "%s", tstr));
3122 return caplen;
3123 }
3124
3125 /*
3126 * Start out at the beginning of the default radiotap namespace.
3127 */
3128 bit0 = 0;
3129 vendor_namespace = 0;
3130 memset(vendor_oui, 0, 3);
3131 vendor_subnamespace = 0;
3132 skip_length = 0;
3133 /* Assume no flags */
3134 flags = 0;
3135 /* Assume no Atheros padding between 802.11 header and body */
3136 pad = 0;
3137 /* Assume no FCS at end of frame */
3138 fcslen = 0;
3139 for (presentp = &hdr->it_present; presentp <= last_presentp;
3140 presentp++) {
3141 presentflags = EXTRACT_LE_U_4(presentp);
3142
3143 /*
3144 * If this is a vendor namespace, we don't handle it.
3145 */
3146 if (vendor_namespace) {
3147 /*
3148 * Skip past the stuff we don't understand.
3149 * If we add support for any vendor namespaces,
3150 * it'd be added here; use vendor_oui and
3151 * vendor_subnamespace to interpret the fields.
3152 */
3153 if (cpack_advance(&cpacker, skip_length) != 0) {
3154 /*
3155 * Ran out of space in the packet.
3156 */
3157 break;
3158 }
3159
3160 /*
3161 * We've skipped it all; nothing more to
3162 * skip.
3163 */
3164 skip_length = 0;
3165 } else {
3166 if (print_in_radiotap_namespace(ndo, &cpacker,
3167 &flags, presentflags, bit0) != 0) {
3168 /*
3169 * Fatal error - can't process anything
3170 * more in the radiotap header.
3171 */
3172 break;
3173 }
3174 }
3175
3176 /*
3177 * Handle the namespace switch bits; we've already handled
3178 * the extension bit in all but the last word above.
3179 */
3180 switch (presentflags &
3181 (BIT(IEEE80211_RADIOTAP_NAMESPACE)|BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE))) {
3182
3183 case 0:
3184 /*
3185 * We're not changing namespaces.
3186 * advance to the next 32 bits in the current
3187 * namespace.
3188 */
3189 bit0 += 32;
3190 break;
3191
3192 case BIT(IEEE80211_RADIOTAP_NAMESPACE):
3193 /*
3194 * We're switching to the radiotap namespace.
3195 * Reset the presence-bitmap index to 0, and
3196 * reset the namespace to the default radiotap
3197 * namespace.
3198 */
3199 bit0 = 0;
3200 vendor_namespace = 0;
3201 memset(vendor_oui, 0, 3);
3202 vendor_subnamespace = 0;
3203 skip_length = 0;
3204 break;
3205
3206 case BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE):
3207 /*
3208 * We're switching to a vendor namespace.
3209 * Reset the presence-bitmap index to 0,
3210 * note that we're in a vendor namespace,
3211 * and fetch the fields of the Vendor Namespace
3212 * item.
3213 */
3214 bit0 = 0;
3215 vendor_namespace = 1;
3216 if ((cpack_align_and_reserve(&cpacker, 2)) == NULL) {
3217 ND_PRINT((ndo, "%s", tstr));
3218 break;
3219 }
3220 if (cpack_uint8(&cpacker, &vendor_oui[0]) != 0) {
3221 ND_PRINT((ndo, "%s", tstr));
3222 break;
3223 }
3224 if (cpack_uint8(&cpacker, &vendor_oui[1]) != 0) {
3225 ND_PRINT((ndo, "%s", tstr));
3226 break;
3227 }
3228 if (cpack_uint8(&cpacker, &vendor_oui[2]) != 0) {
3229 ND_PRINT((ndo, "%s", tstr));
3230 break;
3231 }
3232 if (cpack_uint8(&cpacker, &vendor_subnamespace) != 0) {
3233 ND_PRINT((ndo, "%s", tstr));
3234 break;
3235 }
3236 if (cpack_uint16(&cpacker, &skip_length) != 0) {
3237 ND_PRINT((ndo, "%s", tstr));
3238 break;
3239 }
3240 break;
3241
3242 default:
3243 /*
3244 * Illegal combination. The behavior in this
3245 * case is undefined by the radiotap spec; we
3246 * just ignore both bits.
3247 */
3248 break;
3249 }
3250 }
3251
3252 if (flags & IEEE80211_RADIOTAP_F_DATAPAD)
3253 pad = 1; /* Atheros padding */
3254 if (flags & IEEE80211_RADIOTAP_F_FCS)
3255 fcslen = 4; /* FCS at end of packet */
3256 return len + ieee802_11_print(ndo, p + len, length - len, caplen - len, pad,
3257 fcslen);
3258 #undef BITNO_32
3259 #undef BITNO_16
3260 #undef BITNO_8
3261 #undef BITNO_4
3262 #undef BITNO_2
3263 #undef BIT
3264 }
3265
3266 static u_int
3267 ieee802_11_avs_radio_print(netdissect_options *ndo,
3268 const u_char *p, u_int length, u_int caplen)
3269 {
3270 uint32_t caphdr_len;
3271
3272 if (caplen < 8) {
3273 ND_PRINT((ndo, "%s", tstr));
3274 return caplen;
3275 }
3276
3277 caphdr_len = EXTRACT_BE_U_4(p + 4);
3278 if (caphdr_len < 8) {
3279 /*
3280 * Yow! The capture header length is claimed not
3281 * to be large enough to include even the version
3282 * cookie or capture header length!
3283 */
3284 ND_PRINT((ndo, "%s", tstr));
3285 return caplen;
3286 }
3287
3288 if (caplen < caphdr_len) {
3289 ND_PRINT((ndo, "%s", tstr));
3290 return caplen;
3291 }
3292
3293 return caphdr_len + ieee802_11_print(ndo, p + caphdr_len,
3294 length - caphdr_len, caplen - caphdr_len, 0, 0);
3295 }
3296
3297 #define PRISM_HDR_LEN 144
3298
3299 #define WLANCAP_MAGIC_COOKIE_BASE 0x80211000
3300 #define WLANCAP_MAGIC_COOKIE_V1 0x80211001
3301 #define WLANCAP_MAGIC_COOKIE_V2 0x80211002
3302
3303 /*
3304 * For DLT_PRISM_HEADER; like DLT_IEEE802_11, but with an extra header,
3305 * containing information such as radio information, which we
3306 * currently ignore.
3307 *
3308 * If, however, the packet begins with WLANCAP_MAGIC_COOKIE_V1 or
3309 * WLANCAP_MAGIC_COOKIE_V2, it's really DLT_IEEE802_11_RADIO_AVS
3310 * (currently, on Linux, there's no ARPHRD_ type for
3311 * DLT_IEEE802_11_RADIO_AVS, as there is a ARPHRD_IEEE80211_PRISM
3312 * for DLT_PRISM_HEADER, so ARPHRD_IEEE80211_PRISM is used for
3313 * the AVS header, and the first 4 bytes of the header are used to
3314 * indicate whether it's a Prism header or an AVS header).
3315 */
3316 u_int
3317 prism_if_print(netdissect_options *ndo,
3318 const struct pcap_pkthdr *h, const u_char *p)
3319 {
3320 u_int caplen = h->caplen;
3321 u_int length = h->len;
3322 uint32_t msgcode;
3323
3324 if (caplen < 4) {
3325 ND_PRINT((ndo, "%s", tstr));
3326 return caplen;
3327 }
3328
3329 msgcode = EXTRACT_BE_U_4(p);
3330 if (msgcode == WLANCAP_MAGIC_COOKIE_V1 ||
3331 msgcode == WLANCAP_MAGIC_COOKIE_V2)
3332 return ieee802_11_avs_radio_print(ndo, p, length, caplen);
3333
3334 if (caplen < PRISM_HDR_LEN) {
3335 ND_PRINT((ndo, "%s", tstr));
3336 return caplen;
3337 }
3338
3339 return PRISM_HDR_LEN + ieee802_11_print(ndo, p + PRISM_HDR_LEN,
3340 length - PRISM_HDR_LEN, caplen - PRISM_HDR_LEN, 0, 0);
3341 }
3342
3343 /*
3344 * For DLT_IEEE802_11_RADIO; like DLT_IEEE802_11, but with an extra
3345 * header, containing information such as radio information.
3346 */
3347 u_int
3348 ieee802_11_radio_if_print(netdissect_options *ndo,
3349 const struct pcap_pkthdr *h, const u_char *p)
3350 {
3351 return ieee802_11_radio_print(ndo, p, h->len, h->caplen);
3352 }
3353
3354 /*
3355 * For DLT_IEEE802_11_RADIO_AVS; like DLT_IEEE802_11, but with an
3356 * extra header, containing information such as radio information,
3357 * which we currently ignore.
3358 */
3359 u_int
3360 ieee802_11_radio_avs_if_print(netdissect_options *ndo,
3361 const struct pcap_pkthdr *h, const u_char *p)
3362 {
3363 return ieee802_11_avs_radio_print(ndo, p, h->len, h->caplen);
3364 }
[mirror] the TCPdump network dissector