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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 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26
27 #include <netdissect-stdinc.h>
28
29 #include <string.h>
30
31 #include "netdissect.h"
32 #include "addrtoname.h"
33
34 #include "extract.h"
35
36 #include "cpack.h"
37
38
39 /* Lengths of 802.11 header components. */
40 #define IEEE802_11_FC_LEN 2
41 #define IEEE802_11_DUR_LEN 2
42 #define IEEE802_11_DA_LEN 6
43 #define IEEE802_11_SA_LEN 6
44 #define IEEE802_11_BSSID_LEN 6
45 #define IEEE802_11_RA_LEN 6
46 #define IEEE802_11_TA_LEN 6
47 #define IEEE802_11_ADDR1_LEN 6
48 #define IEEE802_11_SEQ_LEN 2
49 #define IEEE802_11_CTL_LEN 2
50 #define IEEE802_11_CARRIED_FC_LEN 2
51 #define IEEE802_11_HT_CONTROL_LEN 4
52 #define IEEE802_11_IV_LEN 3
53 #define IEEE802_11_KID_LEN 1
54
55 /* Frame check sequence length. */
56 #define IEEE802_11_FCS_LEN 4
57
58 /* Lengths of beacon components. */
59 #define IEEE802_11_TSTAMP_LEN 8
60 #define IEEE802_11_BCNINT_LEN 2
61 #define IEEE802_11_CAPINFO_LEN 2
62 #define IEEE802_11_LISTENINT_LEN 2
63
64 #define IEEE802_11_AID_LEN 2
65 #define IEEE802_11_STATUS_LEN 2
66 #define IEEE802_11_REASON_LEN 2
67
68 /* Length of previous AP in reassocation frame */
69 #define IEEE802_11_AP_LEN 6
70
71 #define T_MGMT 0x0 /* management */
72 #define T_CTRL 0x1 /* control */
73 #define T_DATA 0x2 /* data */
74 #define T_RESV 0x3 /* reserved */
75
76 #define ST_ASSOC_REQUEST 0x0
77 #define ST_ASSOC_RESPONSE 0x1
78 #define ST_REASSOC_REQUEST 0x2
79 #define ST_REASSOC_RESPONSE 0x3
80 #define ST_PROBE_REQUEST 0x4
81 #define ST_PROBE_RESPONSE 0x5
82 /* RESERVED 0x6 */
83 /* RESERVED 0x7 */
84 #define ST_BEACON 0x8
85 #define ST_ATIM 0x9
86 #define ST_DISASSOC 0xA
87 #define ST_AUTH 0xB
88 #define ST_DEAUTH 0xC
89 #define ST_ACTION 0xD
90 /* RESERVED 0xE */
91 /* RESERVED 0xF */
92
93 static const struct tok st_str[] = {
94 { ST_ASSOC_REQUEST, "Assoc Request" },
95 { ST_ASSOC_RESPONSE, "Assoc Response" },
96 { ST_REASSOC_REQUEST, "ReAssoc Request" },
97 { ST_REASSOC_RESPONSE, "ReAssoc Response" },
98 { ST_PROBE_REQUEST, "Probe Request" },
99 { ST_PROBE_RESPONSE, "Probe Response" },
100 { ST_BEACON, "Beacon" },
101 { ST_ATIM, "ATIM" },
102 { ST_DISASSOC, "Disassociation" },
103 { ST_AUTH, "Authentication" },
104 { ST_DEAUTH, "DeAuthentication" },
105 { ST_ACTION, "Action" },
106 { 0, NULL }
107 };
108
109 #define CTRL_CONTROL_WRAPPER 0x7
110 #define CTRL_BAR 0x8
111 #define CTRL_BA 0x9
112 #define CTRL_PS_POLL 0xA
113 #define CTRL_RTS 0xB
114 #define CTRL_CTS 0xC
115 #define CTRL_ACK 0xD
116 #define CTRL_CF_END 0xE
117 #define CTRL_END_ACK 0xF
118
119 static const struct tok ctrl_str[] = {
120 { CTRL_CONTROL_WRAPPER, "Control Wrapper" },
121 { CTRL_BAR, "BAR" },
122 { CTRL_BA, "BA" },
123 { CTRL_PS_POLL, "Power Save-Poll" },
124 { CTRL_RTS, "Request-To-Send" },
125 { CTRL_CTS, "Clear-To-Send" },
126 { CTRL_ACK, "Acknowledgment" },
127 { CTRL_CF_END, "CF-End" },
128 { CTRL_END_ACK, "CF-End+CF-Ack" },
129 { 0, NULL }
130 };
131
132 #define DATA_DATA 0x0
133 #define DATA_DATA_CF_ACK 0x1
134 #define DATA_DATA_CF_POLL 0x2
135 #define DATA_DATA_CF_ACK_POLL 0x3
136 #define DATA_NODATA 0x4
137 #define DATA_NODATA_CF_ACK 0x5
138 #define DATA_NODATA_CF_POLL 0x6
139 #define DATA_NODATA_CF_ACK_POLL 0x7
140
141 #define DATA_QOS_DATA 0x8
142 #define DATA_QOS_DATA_CF_ACK 0x9
143 #define DATA_QOS_DATA_CF_POLL 0xA
144 #define DATA_QOS_DATA_CF_ACK_POLL 0xB
145 #define DATA_QOS_NODATA 0xC
146 #define DATA_QOS_CF_POLL_NODATA 0xE
147 #define DATA_QOS_CF_ACK_POLL_NODATA 0xF
148
149 /*
150 * The subtype field of a data frame is, in effect, composed of 4 flag
151 * bits - CF-Ack, CF-Poll, Null (means the frame doesn't actually have
152 * any data), and QoS.
153 */
154 #define DATA_FRAME_IS_CF_ACK(x) ((x) & 0x01)
155 #define DATA_FRAME_IS_CF_POLL(x) ((x) & 0x02)
156 #define DATA_FRAME_IS_NULL(x) ((x) & 0x04)
157 #define DATA_FRAME_IS_QOS(x) ((x) & 0x08)
158
159 /*
160 * Bits in the frame control field.
161 */
162 #define FC_VERSION(fc) ((fc) & 0x3)
163 #define FC_TYPE(fc) (((fc) >> 2) & 0x3)
164 #define FC_SUBTYPE(fc) (((fc) >> 4) & 0xF)
165 #define FC_TO_DS(fc) ((fc) & 0x0100)
166 #define FC_FROM_DS(fc) ((fc) & 0x0200)
167 #define FC_MORE_FLAG(fc) ((fc) & 0x0400)
168 #define FC_RETRY(fc) ((fc) & 0x0800)
169 #define FC_POWER_MGMT(fc) ((fc) & 0x1000)
170 #define FC_MORE_DATA(fc) ((fc) & 0x2000)
171 #define FC_PROTECTED(fc) ((fc) & 0x4000)
172 #define FC_ORDER(fc) ((fc) & 0x8000)
173
174 struct mgmt_header_t {
175 uint16_t fc;
176 uint16_t duration;
177 uint8_t da[IEEE802_11_DA_LEN];
178 uint8_t sa[IEEE802_11_SA_LEN];
179 uint8_t bssid[IEEE802_11_BSSID_LEN];
180 uint16_t seq_ctrl;
181 };
182
183 #define MGMT_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
184 IEEE802_11_DA_LEN+IEEE802_11_SA_LEN+\
185 IEEE802_11_BSSID_LEN+IEEE802_11_SEQ_LEN)
186
187 #define CAPABILITY_ESS(cap) ((cap) & 0x0001)
188 #define CAPABILITY_IBSS(cap) ((cap) & 0x0002)
189 #define CAPABILITY_CFP(cap) ((cap) & 0x0004)
190 #define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008)
191 #define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)
192
193 struct ssid_t {
194 uint8_t element_id;
195 uint8_t length;
196 u_char ssid[33]; /* 32 + 1 for null */
197 };
198
199 struct rates_t {
200 uint8_t element_id;
201 uint8_t length;
202 uint8_t rate[16];
203 };
204
205 struct challenge_t {
206 uint8_t element_id;
207 uint8_t length;
208 uint8_t text[254]; /* 1-253 + 1 for null */
209 };
210
211 struct fh_t {
212 uint8_t element_id;
213 uint8_t length;
214 uint16_t dwell_time;
215 uint8_t hop_set;
216 uint8_t hop_pattern;
217 uint8_t hop_index;
218 };
219
220 struct ds_t {
221 uint8_t element_id;
222 uint8_t length;
223 uint8_t channel;
224 };
225
226 struct cf_t {
227 uint8_t element_id;
228 uint8_t length;
229 uint8_t count;
230 uint8_t period;
231 uint16_t max_duration;
232 uint16_t dur_remaing;
233 };
234
235 struct tim_t {
236 uint8_t element_id;
237 uint8_t length;
238 uint8_t count;
239 uint8_t period;
240 uint8_t bitmap_control;
241 uint8_t bitmap[251];
242 };
243
244 #define E_SSID 0
245 #define E_RATES 1
246 #define E_FH 2
247 #define E_DS 3
248 #define E_CF 4
249 #define E_TIM 5
250 #define E_IBSS 6
251 /* reserved 7 */
252 /* reserved 8 */
253 /* reserved 9 */
254 /* reserved 10 */
255 /* reserved 11 */
256 /* reserved 12 */
257 /* reserved 13 */
258 /* reserved 14 */
259 /* reserved 15 */
260 /* reserved 16 */
261
262 #define E_CHALLENGE 16
263 /* reserved 17 */
264 /* reserved 18 */
265 /* reserved 19 */
266 /* reserved 16 */
267 /* reserved 16 */
268
269
270 struct mgmt_body_t {
271 uint8_t timestamp[IEEE802_11_TSTAMP_LEN];
272 uint16_t beacon_interval;
273 uint16_t listen_interval;
274 uint16_t status_code;
275 uint16_t aid;
276 u_char ap[IEEE802_11_AP_LEN];
277 uint16_t reason_code;
278 uint16_t auth_alg;
279 uint16_t auth_trans_seq_num;
280 int challenge_present;
281 struct challenge_t challenge;
282 uint16_t capability_info;
283 int ssid_present;
284 struct ssid_t ssid;
285 int rates_present;
286 struct rates_t rates;
287 int ds_present;
288 struct ds_t ds;
289 int cf_present;
290 struct cf_t cf;
291 int fh_present;
292 struct fh_t fh;
293 int tim_present;
294 struct tim_t tim;
295 };
296
297 struct ctrl_control_wrapper_hdr_t {
298 uint16_t fc;
299 uint16_t duration;
300 uint8_t addr1[IEEE802_11_ADDR1_LEN];
301 uint16_t carried_fc[IEEE802_11_CARRIED_FC_LEN];
302 uint16_t ht_control[IEEE802_11_HT_CONTROL_LEN];
303 };
304
305 #define CTRL_CONTROL_WRAPPER_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
306 IEEE802_11_ADDR1_LEN+\
307 IEEE802_11_CARRIED_FC_LEN+\
308 IEEE802_11_HT_CONTROL_LEN)
309
310 struct ctrl_rts_hdr_t {
311 uint16_t fc;
312 uint16_t duration;
313 uint8_t ra[IEEE802_11_RA_LEN];
314 uint8_t ta[IEEE802_11_TA_LEN];
315 };
316
317 #define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
318 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN)
319
320 struct ctrl_cts_hdr_t {
321 uint16_t fc;
322 uint16_t duration;
323 uint8_t ra[IEEE802_11_RA_LEN];
324 };
325
326 #define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
327
328 struct ctrl_ack_hdr_t {
329 uint16_t fc;
330 uint16_t duration;
331 uint8_t ra[IEEE802_11_RA_LEN];
332 };
333
334 #define CTRL_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
335
336 struct ctrl_ps_poll_hdr_t {
337 uint16_t fc;
338 uint16_t aid;
339 uint8_t bssid[IEEE802_11_BSSID_LEN];
340 uint8_t ta[IEEE802_11_TA_LEN];
341 };
342
343 #define CTRL_PS_POLL_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_AID_LEN+\
344 IEEE802_11_BSSID_LEN+IEEE802_11_TA_LEN)
345
346 struct ctrl_end_hdr_t {
347 uint16_t fc;
348 uint16_t duration;
349 uint8_t ra[IEEE802_11_RA_LEN];
350 uint8_t bssid[IEEE802_11_BSSID_LEN];
351 };
352
353 #define CTRL_END_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
354 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
355
356 struct ctrl_end_ack_hdr_t {
357 uint16_t fc;
358 uint16_t duration;
359 uint8_t ra[IEEE802_11_RA_LEN];
360 uint8_t bssid[IEEE802_11_BSSID_LEN];
361 };
362
363 #define CTRL_END_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
364 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
365
366 struct ctrl_ba_hdr_t {
367 uint16_t fc;
368 uint16_t duration;
369 uint8_t ra[IEEE802_11_RA_LEN];
370 };
371
372 #define CTRL_BA_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
373
374 struct ctrl_bar_hdr_t {
375 uint16_t fc;
376 uint16_t dur;
377 uint8_t ra[IEEE802_11_RA_LEN];
378 uint8_t ta[IEEE802_11_TA_LEN];
379 uint16_t ctl;
380 uint16_t seq;
381 };
382
383 #define CTRL_BAR_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
384 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN+\
385 IEEE802_11_CTL_LEN+IEEE802_11_SEQ_LEN)
386
387 struct meshcntl_t {
388 uint8_t flags;
389 uint8_t ttl;
390 uint8_t seq[4];
391 uint8_t addr4[6];
392 uint8_t addr5[6];
393 uint8_t addr6[6];
394 };
395
396 #define IV_IV(iv) ((iv) & 0xFFFFFF)
397 #define IV_PAD(iv) (((iv) >> 24) & 0x3F)
398 #define IV_KEYID(iv) (((iv) >> 30) & 0x03)
399
400 #define PRINT_SSID(p) \
401 if (p.ssid_present) { \
402 ND_PRINT((ndo, " (")); \
403 fn_print(ndo, p.ssid.ssid, NULL); \
404 ND_PRINT((ndo, ")")); \
405 }
406
407 #define PRINT_RATE(_sep, _r, _suf) \
408 ND_PRINT((ndo, "%s%2.1f%s", _sep, (.5 * ((_r) & 0x7f)), _suf))
409 #define PRINT_RATES(p) \
410 if (p.rates_present) { \
411 int z; \
412 const char *sep = " ["; \
413 for (z = 0; z < p.rates.length ; z++) { \
414 PRINT_RATE(sep, p.rates.rate[z], \
415 (p.rates.rate[z] & 0x80 ? "*" : "")); \
416 sep = " "; \
417 } \
418 if (p.rates.length != 0) \
419 ND_PRINT((ndo, " Mbit]")); \
420 }
421
422 #define PRINT_DS_CHANNEL(p) \
423 if (p.ds_present) \
424 ND_PRINT((ndo, " CH: %u", p.ds.channel)); \
425 ND_PRINT((ndo, "%s", \
426 CAPABILITY_PRIVACY(p.capability_info) ? ", PRIVACY" : ""));
427
428 #define MAX_MCS_INDEX 76
429
430 /*
431 * Indices are:
432 *
433 * the MCS index (0-76);
434 *
435 * 0 for 20 MHz, 1 for 40 MHz;
436 *
437 * 0 for a long guard interval, 1 for a short guard interval.
438 */
439 static const float ieee80211_float_htrates[MAX_MCS_INDEX+1][2][2] = {
440 /* MCS 0 */
441 { /* 20 Mhz */ { 6.5, /* SGI */ 7.2, },
442 /* 40 Mhz */ { 13.5, /* SGI */ 15.0, },
443 },
444
445 /* MCS 1 */
446 { /* 20 Mhz */ { 13.0, /* SGI */ 14.4, },
447 /* 40 Mhz */ { 27.0, /* SGI */ 30.0, },
448 },
449
450 /* MCS 2 */
451 { /* 20 Mhz */ { 19.5, /* SGI */ 21.7, },
452 /* 40 Mhz */ { 40.5, /* SGI */ 45.0, },
453 },
454
455 /* MCS 3 */
456 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, },
457 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, },
458 },
459
460 /* MCS 4 */
461 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
462 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
463 },
464
465 /* MCS 5 */
466 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
467 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
468 },
469
470 /* MCS 6 */
471 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, },
472 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, },
473 },
474
475 /* MCS 7 */
476 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
477 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
478 },
479
480 /* MCS 8 */
481 { /* 20 Mhz */ { 13.0, /* SGI */ 14.4, },
482 /* 40 Mhz */ { 27.0, /* SGI */ 30.0, },
483 },
484
485 /* MCS 9 */
486 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, },
487 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, },
488 },
489
490 /* MCS 10 */
491 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
492 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
493 },
494
495 /* MCS 11 */
496 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
497 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
498 },
499
500 /* MCS 12 */
501 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
502 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
503 },
504
505 /* MCS 13 */
506 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
507 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
508 },
509
510 /* MCS 14 */
511 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
512 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
513 },
514
515 /* MCS 15 */
516 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, },
517 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, },
518 },
519
520 /* MCS 16 */
521 { /* 20 Mhz */ { 19.5, /* SGI */ 21.7, },
522 /* 40 Mhz */ { 40.5, /* SGI */ 45.0, },
523 },
524
525 /* MCS 17 */
526 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
527 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
528 },
529
530 /* MCS 18 */
531 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, },
532 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, },
533 },
534
535 /* MCS 19 */
536 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
537 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
538 },
539
540 /* MCS 20 */
541 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
542 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
543 },
544
545 /* MCS 21 */
546 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
547 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
548 },
549
550 /* MCS 22 */
551 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, },
552 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, },
553 },
554
555 /* MCS 23 */
556 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, },
557 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, },
558 },
559
560 /* MCS 24 */
561 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, },
562 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, },
563 },
564
565 /* MCS 25 */
566 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
567 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
568 },
569
570 /* MCS 26 */
571 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
572 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
573 },
574
575 /* MCS 27 */
576 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
577 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
578 },
579
580 /* MCS 28 */
581 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
582 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
583 },
584
585 /* MCS 29 */
586 { /* 20 Mhz */ { 208.0, /* SGI */ 231.1, },
587 /* 40 Mhz */ { 432.0, /* SGI */ 480.0, },
588 },
589
590 /* MCS 30 */
591 { /* 20 Mhz */ { 234.0, /* SGI */ 260.0, },
592 /* 40 Mhz */ { 486.0, /* SGI */ 540.0, },
593 },
594
595 /* MCS 31 */
596 { /* 20 Mhz */ { 260.0, /* SGI */ 288.9, },
597 /* 40 Mhz */ { 540.0, /* SGI */ 600.0, },
598 },
599
600 /* MCS 32 */
601 { /* 20 Mhz */ { 0.0, /* SGI */ 0.0, }, /* not valid */
602 /* 40 Mhz */ { 6.0, /* SGI */ 6.7, },
603 },
604
605 /* MCS 33 */
606 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, },
607 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, },
608 },
609
610 /* MCS 34 */
611 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
612 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
613 },
614
615 /* MCS 35 */
616 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
617 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
618 },
619
620 /* MCS 36 */
621 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, },
622 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, },
623 },
624
625 /* MCS 37 */
626 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
627 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
628 },
629
630 /* MCS 38 */
631 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
632 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
633 },
634
635 /* MCS 39 */
636 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, },
637 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, },
638 },
639
640 /* MCS 40 */
641 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
642 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
643 },
644
645 /* MCS 41 */
646 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
647 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
648 },
649
650 /* MCS 42 */
651 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
652 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
653 },
654
655 /* MCS 43 */
656 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
657 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
658 },
659
660 /* MCS 44 */
661 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
662 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
663 },
664
665 /* MCS 45 */
666 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
667 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
668 },
669
670 /* MCS 46 */
671 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
672 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
673 },
674
675 /* MCS 47 */
676 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
677 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
678 },
679
680 /* MCS 48 */
681 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
682 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
683 },
684
685 /* MCS 49 */
686 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
687 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
688 },
689
690 /* MCS 50 */
691 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
692 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
693 },
694
695 /* MCS 51 */
696 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
697 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
698 },
699
700 /* MCS 52 */
701 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
702 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
703 },
704
705 /* MCS 53 */
706 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, },
707 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, },
708 },
709
710 /* MCS 54 */
711 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
712 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
713 },
714
715 /* MCS 55 */
716 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
717 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
718 },
719
720 /* MCS 56 */
721 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, },
722 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, },
723 },
724
725 /* MCS 57 */
726 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, },
727 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, },
728 },
729
730 /* MCS 58 */
731 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
732 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
733 },
734
735 /* MCS 59 */
736 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
737 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
738 },
739
740 /* MCS 60 */
741 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, },
742 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, },
743 },
744
745 /* MCS 61 */
746 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
747 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
748 },
749
750 /* MCS 62 */
751 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, },
752 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, },
753 },
754
755 /* MCS 63 */
756 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, },
757 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, },
758 },
759
760 /* MCS 64 */
761 { /* 20 Mhz */ { 143.0, /* SGI */ 158.9, },
762 /* 40 Mhz */ { 297.0, /* SGI */ 330.0, },
763 },
764
765 /* MCS 65 */
766 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, },
767 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, },
768 },
769
770 /* MCS 66 */
771 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
772 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
773 },
774
775 /* MCS 67 */
776 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
777 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
778 },
779
780 /* MCS 68 */
781 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, },
782 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, },
783 },
784
785 /* MCS 69 */
786 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, },
787 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, },
788 },
789
790 /* MCS 70 */
791 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
792 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
793 },
794
795 /* MCS 71 */
796 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, },
797 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, },
798 },
799
800 /* MCS 72 */
801 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, },
802 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, },
803 },
804
805 /* MCS 73 */
806 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, },
807 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, },
808 },
809
810 /* MCS 74 */
811 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, },
812 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, },
813 },
814
815 /* MCS 75 */
816 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, },
817 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, },
818 },
819
820 /* MCS 76 */
821 { /* 20 Mhz */ { 214.5, /* SGI */ 238.3, },
822 /* 40 Mhz */ { 445.5, /* SGI */ 495.0, },
823 },
824 };
825
826 static const char *auth_alg_text[]={"Open System","Shared Key","EAP"};
827 #define NUM_AUTH_ALGS (sizeof auth_alg_text / sizeof auth_alg_text[0])
828
829 static const char *status_text[] = {
830 "Successful", /* 0 */
831 "Unspecified failure", /* 1 */
832 "Reserved", /* 2 */
833 "Reserved", /* 3 */
834 "Reserved", /* 4 */
835 "Reserved", /* 5 */
836 "Reserved", /* 6 */
837 "Reserved", /* 7 */
838 "Reserved", /* 8 */
839 "Reserved", /* 9 */
840 "Cannot Support all requested capabilities in the Capability "
841 "Information field", /* 10 */
842 "Reassociation denied due to inability to confirm that association "
843 "exists", /* 11 */
844 "Association denied due to reason outside the scope of the "
845 "standard", /* 12 */
846 "Responding station does not support the specified authentication "
847 "algorithm ", /* 13 */
848 "Received an Authentication frame with authentication transaction "
849 "sequence number out of expected sequence", /* 14 */
850 "Authentication rejected because of challenge failure", /* 15 */
851 "Authentication rejected due to timeout waiting for next frame in "
852 "sequence", /* 16 */
853 "Association denied because AP is unable to handle additional"
854 "associated stations", /* 17 */
855 "Association denied due to requesting station not supporting all of "
856 "the data rates in BSSBasicRateSet parameter", /* 18 */
857 "Association denied due to requesting station not supporting "
858 "short preamble operation", /* 19 */
859 "Association denied due to requesting station not supporting "
860 "PBCC encoding", /* 20 */
861 "Association denied due to requesting station not supporting "
862 "channel agility", /* 21 */
863 "Association request rejected because Spectrum Management "
864 "capability is required", /* 22 */
865 "Association request rejected because the information in the "
866 "Power Capability element is unacceptable", /* 23 */
867 "Association request rejected because the information in the "
868 "Supported Channels element is unacceptable", /* 24 */
869 "Association denied due to requesting station not supporting "
870 "short slot operation", /* 25 */
871 "Association denied due to requesting station not supporting "
872 "DSSS-OFDM operation", /* 26 */
873 "Association denied because the requested STA does not support HT "
874 "features", /* 27 */
875 "Reserved", /* 28 */
876 "Association denied because the requested STA does not support "
877 "the PCO transition time required by the AP", /* 29 */
878 "Reserved", /* 30 */
879 "Reserved", /* 31 */
880 "Unspecified, QoS-related failure", /* 32 */
881 "Association denied due to QAP having insufficient bandwidth "
882 "to handle another QSTA", /* 33 */
883 "Association denied due to excessive frame loss rates and/or "
884 "poor conditions on current operating channel", /* 34 */
885 "Association (with QBSS) denied due to requesting station not "
886 "supporting the QoS facility", /* 35 */
887 "Association denied due to requesting station not supporting "
888 "Block Ack", /* 36 */
889 "The request has been declined", /* 37 */
890 "The request has not been successful as one or more parameters "
891 "have invalid values", /* 38 */
892 "The TS has not been created because the request cannot be honored. "
893 "Try again with the suggested changes to the TSPEC", /* 39 */
894 "Invalid Information Element", /* 40 */
895 "Group Cipher is not valid", /* 41 */
896 "Pairwise Cipher is not valid", /* 42 */
897 "AKMP is not valid", /* 43 */
898 "Unsupported RSN IE version", /* 44 */
899 "Invalid RSN IE Capabilities", /* 45 */
900 "Cipher suite is rejected per security policy", /* 46 */
901 "The TS has not been created. However, the HC may be capable of "
902 "creating a TS, in response to a request, after the time indicated "
903 "in the TS Delay element", /* 47 */
904 "Direct Link is not allowed in the BSS by policy", /* 48 */
905 "Destination STA is not present within this QBSS.", /* 49 */
906 "The Destination STA is not a QSTA.", /* 50 */
907
908 };
909 #define NUM_STATUSES (sizeof status_text / sizeof status_text[0])
910
911 static const char *reason_text[] = {
912 "Reserved", /* 0 */
913 "Unspecified reason", /* 1 */
914 "Previous authentication no longer valid", /* 2 */
915 "Deauthenticated because sending station is leaving (or has left) "
916 "IBSS or ESS", /* 3 */
917 "Disassociated due to inactivity", /* 4 */
918 "Disassociated because AP is unable to handle all currently "
919 " associated stations", /* 5 */
920 "Class 2 frame received from nonauthenticated station", /* 6 */
921 "Class 3 frame received from nonassociated station", /* 7 */
922 "Disassociated because sending station is leaving "
923 "(or has left) BSS", /* 8 */
924 "Station requesting (re)association is not authenticated with "
925 "responding station", /* 9 */
926 "Disassociated because the information in the Power Capability "
927 "element is unacceptable", /* 10 */
928 "Disassociated because the information in the SupportedChannels "
929 "element is unacceptable", /* 11 */
930 "Invalid Information Element", /* 12 */
931 "Reserved", /* 13 */
932 "Michael MIC failure", /* 14 */
933 "4-Way Handshake timeout", /* 15 */
934 "Group key update timeout", /* 16 */
935 "Information element in 4-Way Handshake different from (Re)Association"
936 "Request/Probe Response/Beacon", /* 17 */
937 "Group Cipher is not valid", /* 18 */
938 "AKMP is not valid", /* 20 */
939 "Unsupported RSN IE version", /* 21 */
940 "Invalid RSN IE Capabilities", /* 22 */
941 "IEEE 802.1X Authentication failed", /* 23 */
942 "Cipher suite is rejected per security policy", /* 24 */
943 "Reserved", /* 25 */
944 "Reserved", /* 26 */
945 "Reserved", /* 27 */
946 "Reserved", /* 28 */
947 "Reserved", /* 29 */
948 "Reserved", /* 30 */
949 "TS deleted because QoS AP lacks sufficient bandwidth for this "
950 "QoS STA due to a change in BSS service characteristics or "
951 "operational mode (e.g. an HT BSS change from 40 MHz channel "
952 "to 20 MHz channel)", /* 31 */
953 "Disassociated for unspecified, QoS-related reason", /* 32 */
954 "Disassociated because QoS AP lacks sufficient bandwidth for this "
955 "QoS STA", /* 33 */
956 "Disassociated because of excessive number of frames that need to be "
957 "acknowledged, but are not acknowledged for AP transmissions "
958 "and/or poor channel conditions", /* 34 */
959 "Disassociated because STA is transmitting outside the limits "
960 "of its TXOPs", /* 35 */
961 "Requested from peer STA as the STA is leaving the BSS "
962 "(or resetting)", /* 36 */
963 "Requested from peer STA as it does not want to use the "
964 "mechanism", /* 37 */
965 "Requested from peer STA as the STA received frames using the "
966 "mechanism for which a set up is required", /* 38 */
967 "Requested from peer STA due to time out", /* 39 */
968 "Reserved", /* 40 */
969 "Reserved", /* 41 */
970 "Reserved", /* 42 */
971 "Reserved", /* 43 */
972 "Reserved", /* 44 */
973 "Peer STA does not support the requested cipher suite", /* 45 */
974 "Association denied due to requesting STA not supporting HT "
975 "features", /* 46 */
976 };
977 #define NUM_REASONS (sizeof reason_text / sizeof reason_text[0])
978
979 static int
980 wep_print(netdissect_options *ndo,
981 const u_char *p)
982 {
983 uint32_t iv;
984
985 if (!ND_TTEST2(*p, IEEE802_11_IV_LEN + IEEE802_11_KID_LEN))
986 return 0;
987 iv = EXTRACT_LE_32BITS(p);
988
989 ND_PRINT((ndo, " IV:%3x Pad %x KeyID %x", IV_IV(iv), IV_PAD(iv),
990 IV_KEYID(iv)));
991
992 return 1;
993 }
994
995 static int
996 parse_elements(netdissect_options *ndo,
997 struct mgmt_body_t *pbody, const u_char *p, int offset,
998 u_int length)
999 {
1000 u_int elementlen;
1001 struct ssid_t ssid;
1002 struct challenge_t challenge;
1003 struct rates_t rates;
1004 struct ds_t ds;
1005 struct cf_t cf;
1006 struct tim_t tim;
1007
1008 /*
1009 * We haven't seen any elements yet.
1010 */
1011 pbody->challenge_present = 0;
1012 pbody->ssid_present = 0;
1013 pbody->rates_present = 0;
1014 pbody->ds_present = 0;
1015 pbody->cf_present = 0;
1016 pbody->tim_present = 0;
1017
1018 while (length != 0) {
1019 /* Make sure we at least have the element ID and length. */
1020 if (!ND_TTEST2(*(p + offset), 2))
1021 return 0;
1022 if (length < 2)
1023 return 0;
1024 elementlen = *(p + offset + 1);
1025
1026 /* Make sure we have the entire element. */
1027 if (!ND_TTEST2(*(p + offset + 2), elementlen))
1028 return 0;
1029 if (length < elementlen + 2)
1030 return 0;
1031
1032 switch (*(p + offset)) {
1033 case E_SSID:
1034 memcpy(&ssid, p + offset, 2);
1035 offset += 2;
1036 length -= 2;
1037 if (ssid.length != 0) {
1038 if (ssid.length > sizeof(ssid.ssid) - 1)
1039 return 0;
1040 if (!ND_TTEST2(*(p + offset), ssid.length))
1041 return 0;
1042 if (length < ssid.length)
1043 return 0;
1044 memcpy(&ssid.ssid, p + offset, ssid.length);
1045 offset += ssid.length;
1046 length -= ssid.length;
1047 }
1048 ssid.ssid[ssid.length] = '\0';
1049 /*
1050 * Present and not truncated.
1051 *
1052 * If we haven't already seen an SSID IE,
1053 * copy this one, otherwise ignore this one,
1054 * so we later report the first one we saw.
1055 */
1056 if (!pbody->ssid_present) {
1057 pbody->ssid = ssid;
1058 pbody->ssid_present = 1;
1059 }
1060 break;
1061 case E_CHALLENGE:
1062 memcpy(&challenge, p + offset, 2);
1063 offset += 2;
1064 length -= 2;
1065 if (challenge.length != 0) {
1066 if (challenge.length >
1067 sizeof(challenge.text) - 1)
1068 return 0;
1069 if (!ND_TTEST2(*(p + offset), challenge.length))
1070 return 0;
1071 if (length < challenge.length)
1072 return 0;
1073 memcpy(&challenge.text, p + offset,
1074 challenge.length);
1075 offset += challenge.length;
1076 length -= challenge.length;
1077 }
1078 challenge.text[challenge.length] = '\0';
1079 /*
1080 * Present and not truncated.
1081 *
1082 * If we haven't already seen a challenge IE,
1083 * copy this one, otherwise ignore this one,
1084 * so we later report the first one we saw.
1085 */
1086 if (!pbody->challenge_present) {
1087 pbody->challenge = challenge;
1088 pbody->challenge_present = 1;
1089 }
1090 break;
1091 case E_RATES:
1092 memcpy(&rates, p + offset, 2);
1093 offset += 2;
1094 length -= 2;
1095 if (rates.length != 0) {
1096 if (rates.length > sizeof rates.rate)
1097 return 0;
1098 if (!ND_TTEST2(*(p + offset), rates.length))
1099 return 0;
1100 if (length < rates.length)
1101 return 0;
1102 memcpy(&rates.rate, p + offset, rates.length);
1103 offset += rates.length;
1104 length -= rates.length;
1105 }
1106 /*
1107 * Present and not truncated.
1108 *
1109 * If we haven't already seen a rates IE,
1110 * copy this one if it's not zero-length,
1111 * otherwise ignore this one, so we later
1112 * report the first one we saw.
1113 *
1114 * We ignore zero-length rates IEs as some
1115 * devices seem to put a zero-length rates
1116 * IE, followed by an SSID IE, followed by
1117 * a non-zero-length rates IE into frames,
1118 * even though IEEE Std 802.11-2007 doesn't
1119 * seem to indicate that a zero-length rates
1120 * IE is valid.
1121 */
1122 if (!pbody->rates_present && rates.length != 0) {
1123 pbody->rates = rates;
1124 pbody->rates_present = 1;
1125 }
1126 break;
1127 case E_DS:
1128 memcpy(&ds, p + offset, 2);
1129 offset += 2;
1130 length -= 2;
1131 if (ds.length != 1) {
1132 offset += ds.length;
1133 length -= ds.length;
1134 break;
1135 }
1136 ds.channel = *(p + offset);
1137 offset += 1;
1138 length -= 1;
1139 /*
1140 * Present and not truncated.
1141 *
1142 * If we haven't already seen a DS IE,
1143 * copy this one, otherwise ignore this one,
1144 * so we later report the first one we saw.
1145 */
1146 if (!pbody->ds_present) {
1147 pbody->ds = ds;
1148 pbody->ds_present = 1;
1149 }
1150 break;
1151 case E_CF:
1152 memcpy(&cf, p + offset, 2);
1153 offset += 2;
1154 length -= 2;
1155 if (cf.length != 6) {
1156 offset += cf.length;
1157 length -= cf.length;
1158 break;
1159 }
1160 memcpy(&cf.count, p + offset, 6);
1161 offset += 6;
1162 length -= 6;
1163 /*
1164 * Present and not truncated.
1165 *
1166 * If we haven't already seen a CF IE,
1167 * copy this one, otherwise ignore this one,
1168 * so we later report the first one we saw.
1169 */
1170 if (!pbody->cf_present) {
1171 pbody->cf = cf;
1172 pbody->cf_present = 1;
1173 }
1174 break;
1175 case E_TIM:
1176 memcpy(&tim, p + offset, 2);
1177 offset += 2;
1178 length -= 2;
1179 if (tim.length <= 3) {
1180 offset += tim.length;
1181 length -= tim.length;
1182 break;
1183 }
1184 if (tim.length - 3 > (int)sizeof tim.bitmap)
1185 return 0;
1186 memcpy(&tim.count, p + offset, 3);
1187 offset += 3;
1188 length -= 3;
1189
1190 memcpy(tim.bitmap, p + (tim.length - 3),
1191 (tim.length - 3));
1192 offset += tim.length - 3;
1193 length -= tim.length - 3;
1194 /*
1195 * Present and not truncated.
1196 *
1197 * If we haven't already seen a TIM IE,
1198 * copy this one, otherwise ignore this one,
1199 * so we later report the first one we saw.
1200 */
1201 if (!pbody->tim_present) {
1202 pbody->tim = tim;
1203 pbody->tim_present = 1;
1204 }
1205 break;
1206 default:
1207 #if 0
1208 ND_PRINT((ndo, "(1) unhandled element_id (%d) ",
1209 *(p + offset)));
1210 #endif
1211 offset += 2 + elementlen;
1212 length -= 2 + elementlen;
1213 break;
1214 }
1215 }
1216
1217 /* No problems found. */
1218 return 1;
1219 }
1220
1221 /*********************************************************************************
1222 * Print Handle functions for the management frame types
1223 *********************************************************************************/
1224
1225 static int
1226 handle_beacon(netdissect_options *ndo,
1227 const u_char *p, u_int length)
1228 {
1229 struct mgmt_body_t pbody;
1230 int offset = 0;
1231 int ret;
1232
1233 memset(&pbody, 0, sizeof(pbody));
1234
1235 if (!ND_TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1236 IEEE802_11_CAPINFO_LEN))
1237 return 0;
1238 if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1239 IEEE802_11_CAPINFO_LEN)
1240 return 0;
1241 memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
1242 offset += IEEE802_11_TSTAMP_LEN;
1243 length -= IEEE802_11_TSTAMP_LEN;
1244 pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
1245 offset += IEEE802_11_BCNINT_LEN;
1246 length -= IEEE802_11_BCNINT_LEN;
1247 pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
1248 offset += IEEE802_11_CAPINFO_LEN;
1249 length -= IEEE802_11_CAPINFO_LEN;
1250
1251 ret = parse_elements(ndo, &pbody, p, offset, length);
1252
1253 PRINT_SSID(pbody);
1254 PRINT_RATES(pbody);
1255 ND_PRINT((ndo, " %s",
1256 CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS"));
1257 PRINT_DS_CHANNEL(pbody);
1258
1259 return ret;
1260 }
1261
1262 static int
1263 handle_assoc_request(netdissect_options *ndo,
1264 const u_char *p, u_int length)
1265 {
1266 struct mgmt_body_t pbody;
1267 int offset = 0;
1268 int ret;
1269
1270 memset(&pbody, 0, sizeof(pbody));
1271
1272 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN))
1273 return 0;
1274 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN)
1275 return 0;
1276 pbody.capability_info = EXTRACT_LE_16BITS(p);
1277 offset += IEEE802_11_CAPINFO_LEN;
1278 length -= IEEE802_11_CAPINFO_LEN;
1279 pbody.listen_interval = EXTRACT_LE_16BITS(p+offset);
1280 offset += IEEE802_11_LISTENINT_LEN;
1281 length -= IEEE802_11_LISTENINT_LEN;
1282
1283 ret = parse_elements(ndo, &pbody, p, offset, length);
1284
1285 PRINT_SSID(pbody);
1286 PRINT_RATES(pbody);
1287 return ret;
1288 }
1289
1290 static int
1291 handle_assoc_response(netdissect_options *ndo,
1292 const u_char *p, u_int length)
1293 {
1294 struct mgmt_body_t pbody;
1295 int offset = 0;
1296 int ret;
1297
1298 memset(&pbody, 0, sizeof(pbody));
1299
1300 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN +
1301 IEEE802_11_AID_LEN))
1302 return 0;
1303 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN +
1304 IEEE802_11_AID_LEN)
1305 return 0;
1306 pbody.capability_info = EXTRACT_LE_16BITS(p);
1307 offset += IEEE802_11_CAPINFO_LEN;
1308 length -= IEEE802_11_CAPINFO_LEN;
1309 pbody.status_code = EXTRACT_LE_16BITS(p+offset);
1310 offset += IEEE802_11_STATUS_LEN;
1311 length -= IEEE802_11_STATUS_LEN;
1312 pbody.aid = EXTRACT_LE_16BITS(p+offset);
1313 offset += IEEE802_11_AID_LEN;
1314 length -= IEEE802_11_AID_LEN;
1315
1316 ret = parse_elements(ndo, &pbody, p, offset, length);
1317
1318 ND_PRINT((ndo, " AID(%x) :%s: %s", ((uint16_t)(pbody.aid << 2 )) >> 2 ,
1319 CAPABILITY_PRIVACY(pbody.capability_info) ? " PRIVACY " : "",
1320 (pbody.status_code < NUM_STATUSES
1321 ? status_text[pbody.status_code]
1322 : "n/a")));
1323
1324 return ret;
1325 }
1326
1327 static int
1328 handle_reassoc_request(netdissect_options *ndo,
1329 const u_char *p, u_int length)
1330 {
1331 struct mgmt_body_t pbody;
1332 int offset = 0;
1333 int ret;
1334
1335 memset(&pbody, 0, sizeof(pbody));
1336
1337 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN +
1338 IEEE802_11_AP_LEN))
1339 return 0;
1340 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN +
1341 IEEE802_11_AP_LEN)
1342 return 0;
1343 pbody.capability_info = EXTRACT_LE_16BITS(p);
1344 offset += IEEE802_11_CAPINFO_LEN;
1345 length -= IEEE802_11_CAPINFO_LEN;
1346 pbody.listen_interval = EXTRACT_LE_16BITS(p+offset);
1347 offset += IEEE802_11_LISTENINT_LEN;
1348 length -= IEEE802_11_LISTENINT_LEN;
1349 memcpy(&pbody.ap, p+offset, IEEE802_11_AP_LEN);
1350 offset += IEEE802_11_AP_LEN;
1351 length -= IEEE802_11_AP_LEN;
1352
1353 ret = parse_elements(ndo, &pbody, p, offset, length);
1354
1355 PRINT_SSID(pbody);
1356 ND_PRINT((ndo, " AP : %s", etheraddr_string(ndo, pbody.ap )));
1357
1358 return ret;
1359 }
1360
1361 static int
1362 handle_reassoc_response(netdissect_options *ndo,
1363 const u_char *p, u_int length)
1364 {
1365 /* Same as a Association Reponse */
1366 return handle_assoc_response(ndo, p, length);
1367 }
1368
1369 static int
1370 handle_probe_request(netdissect_options *ndo,
1371 const u_char *p, u_int length)
1372 {
1373 struct mgmt_body_t pbody;
1374 int offset = 0;
1375 int ret;
1376
1377 memset(&pbody, 0, sizeof(pbody));
1378
1379 ret = parse_elements(ndo, &pbody, p, offset, length);
1380
1381 PRINT_SSID(pbody);
1382 PRINT_RATES(pbody);
1383
1384 return ret;
1385 }
1386
1387 static int
1388 handle_probe_response(netdissect_options *ndo,
1389 const u_char *p, u_int length)
1390 {
1391 struct mgmt_body_t pbody;
1392 int offset = 0;
1393 int ret;
1394
1395 memset(&pbody, 0, sizeof(pbody));
1396
1397 if (!ND_TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1398 IEEE802_11_CAPINFO_LEN))
1399 return 0;
1400 if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
1401 IEEE802_11_CAPINFO_LEN)
1402 return 0;
1403 memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
1404 offset += IEEE802_11_TSTAMP_LEN;
1405 length -= IEEE802_11_TSTAMP_LEN;
1406 pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
1407 offset += IEEE802_11_BCNINT_LEN;
1408 length -= IEEE802_11_BCNINT_LEN;
1409 pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
1410 offset += IEEE802_11_CAPINFO_LEN;
1411 length -= IEEE802_11_CAPINFO_LEN;
1412
1413 ret = parse_elements(ndo, &pbody, p, offset, length);
1414
1415 PRINT_SSID(pbody);
1416 PRINT_RATES(pbody);
1417 PRINT_DS_CHANNEL(pbody);
1418
1419 return ret;
1420 }
1421
1422 static int
1423 handle_atim(void)
1424 {
1425 /* the frame body for ATIM is null. */
1426 return 1;
1427 }
1428
1429 static int
1430 handle_disassoc(netdissect_options *ndo,
1431 const u_char *p, u_int length)
1432 {
1433 struct mgmt_body_t pbody;
1434
1435 memset(&pbody, 0, sizeof(pbody));
1436
1437 if (!ND_TTEST2(*p, IEEE802_11_REASON_LEN))
1438 return 0;
1439 if (length < IEEE802_11_REASON_LEN)
1440 return 0;
1441 pbody.reason_code = EXTRACT_LE_16BITS(p);
1442
1443 ND_PRINT((ndo, ": %s",
1444 (pbody.reason_code < NUM_REASONS)
1445 ? reason_text[pbody.reason_code]
1446 : "Reserved"));
1447
1448 return 1;
1449 }
1450
1451 static int
1452 handle_auth(netdissect_options *ndo,
1453 const u_char *p, u_int length)
1454 {
1455 struct mgmt_body_t pbody;
1456 int offset = 0;
1457 int ret;
1458
1459 memset(&pbody, 0, sizeof(pbody));
1460
1461 if (!ND_TTEST2(*p, 6))
1462 return 0;
1463 if (length < 6)
1464 return 0;
1465 pbody.auth_alg = EXTRACT_LE_16BITS(p);
1466 offset += 2;
1467 length -= 2;
1468 pbody.auth_trans_seq_num = EXTRACT_LE_16BITS(p + offset);
1469 offset += 2;
1470 length -= 2;
1471 pbody.status_code = EXTRACT_LE_16BITS(p + offset);
1472 offset += 2;
1473 length -= 2;
1474
1475 ret = parse_elements(ndo, &pbody, p, offset, length);
1476
1477 if ((pbody.auth_alg == 1) &&
1478 ((pbody.auth_trans_seq_num == 2) ||
1479 (pbody.auth_trans_seq_num == 3))) {
1480 ND_PRINT((ndo, " (%s)-%x [Challenge Text] %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 return ret;
1490 }
1491 ND_PRINT((ndo, " (%s)-%x: %s",
1492 (pbody.auth_alg < NUM_AUTH_ALGS)
1493 ? auth_alg_text[pbody.auth_alg]
1494 : "Reserved",
1495 pbody.auth_trans_seq_num,
1496 (pbody.auth_trans_seq_num % 2)
1497 ? ((pbody.status_code < NUM_STATUSES)
1498 ? status_text[pbody.status_code]
1499 : "n/a")
1500 : ""));
1501
1502 return ret;
1503 }
1504
1505 static int
1506 handle_deauth(netdissect_options *ndo,
1507 const uint8_t *src, const u_char *p, u_int length)
1508 {
1509 struct mgmt_body_t pbody;
1510 const char *reason = NULL;
1511
1512 memset(&pbody, 0, sizeof(pbody));
1513
1514 if (!ND_TTEST2(*p, IEEE802_11_REASON_LEN))
1515 return 0;
1516 if (length < IEEE802_11_REASON_LEN)
1517 return 0;
1518 pbody.reason_code = EXTRACT_LE_16BITS(p);
1519
1520 reason = (pbody.reason_code < NUM_REASONS)
1521 ? reason_text[pbody.reason_code]
1522 : "Reserved";
1523
1524 if (ndo->ndo_eflag) {
1525 ND_PRINT((ndo, ": %s", reason));
1526 } else {
1527 ND_PRINT((ndo, " (%s): %s", etheraddr_string(ndo, src), reason));
1528 }
1529 return 1;
1530 }
1531
1532 #define PRINT_HT_ACTION(v) (\
1533 (v) == 0 ? ND_PRINT((ndo, "TxChWidth")) : \
1534 (v) == 1 ? ND_PRINT((ndo, "MIMOPwrSave")) : \
1535 ND_PRINT((ndo, "Act#%d", (v))) \
1536 )
1537 #define PRINT_BA_ACTION(v) (\
1538 (v) == 0 ? ND_PRINT((ndo, "ADDBA Request")) : \
1539 (v) == 1 ? ND_PRINT((ndo, "ADDBA Response")) : \
1540 (v) == 2 ? ND_PRINT((ndo, "DELBA")) : \
1541 ND_PRINT((ndo, "Act#%d", (v))) \
1542 )
1543 #define PRINT_MESHLINK_ACTION(v) (\
1544 (v) == 0 ? ND_PRINT((ndo, "Request")) : \
1545 (v) == 1 ? ND_PRINT((ndo, "Report")) : \
1546 ND_PRINT((ndo, "Act#%d", (v))) \
1547 )
1548 #define PRINT_MESHPEERING_ACTION(v) (\
1549 (v) == 0 ? ND_PRINT((ndo, "Open")) : \
1550 (v) == 1 ? ND_PRINT((ndo, "Confirm")) : \
1551 (v) == 2 ? ND_PRINT((ndo, "Close")) : \
1552 ND_PRINT((ndo, "Act#%d", (v))) \
1553 )
1554 #define PRINT_MESHPATH_ACTION(v) (\
1555 (v) == 0 ? ND_PRINT((ndo, "Request")) : \
1556 (v) == 1 ? ND_PRINT((ndo, "Report")) : \
1557 (v) == 2 ? ND_PRINT((ndo, "Error")) : \
1558 (v) == 3 ? ND_PRINT((ndo, "RootAnnouncement")) : \
1559 ND_PRINT((ndo, "Act#%d", (v))) \
1560 )
1561
1562 #define PRINT_MESH_ACTION(v) (\
1563 (v) == 0 ? ND_PRINT((ndo, "MeshLink")) : \
1564 (v) == 1 ? ND_PRINT((ndo, "HWMP")) : \
1565 (v) == 2 ? ND_PRINT((ndo, "Gate Announcement")) : \
1566 (v) == 3 ? ND_PRINT((ndo, "Congestion Control")) : \
1567 (v) == 4 ? ND_PRINT((ndo, "MCCA Setup Request")) : \
1568 (v) == 5 ? ND_PRINT((ndo, "MCCA Setup Reply")) : \
1569 (v) == 6 ? ND_PRINT((ndo, "MCCA Advertisement Request")) : \
1570 (v) == 7 ? ND_PRINT((ndo, "MCCA Advertisement")) : \
1571 (v) == 8 ? ND_PRINT((ndo, "MCCA Teardown")) : \
1572 (v) == 9 ? ND_PRINT((ndo, "TBTT Adjustment Request")) : \
1573 (v) == 10 ? ND_PRINT((ndo, "TBTT Adjustment Response")) : \
1574 ND_PRINT((ndo, "Act#%d", (v))) \
1575 )
1576 #define PRINT_MULTIHOP_ACTION(v) (\
1577 (v) == 0 ? ND_PRINT((ndo, "Proxy Update")) : \
1578 (v) == 1 ? ND_PRINT((ndo, "Proxy Update Confirmation")) : \
1579 ND_PRINT((ndo, "Act#%d", (v))) \
1580 )
1581 #define PRINT_SELFPROT_ACTION(v) (\
1582 (v) == 1 ? ND_PRINT((ndo, "Peering Open")) : \
1583 (v) == 2 ? ND_PRINT((ndo, "Peering Confirm")) : \
1584 (v) == 3 ? ND_PRINT((ndo, "Peering Close")) : \
1585 (v) == 4 ? ND_PRINT((ndo, "Group Key Inform")) : \
1586 (v) == 5 ? ND_PRINT((ndo, "Group Key Acknowledge")) : \
1587 ND_PRINT((ndo, "Act#%d", (v))) \
1588 )
1589
1590 static int
1591 handle_action(netdissect_options *ndo,
1592 const uint8_t *src, const u_char *p, u_int length)
1593 {
1594 if (!ND_TTEST2(*p, 2))
1595 return 0;
1596 if (length < 2)
1597 return 0;
1598 if (ndo->ndo_eflag) {
1599 ND_PRINT((ndo, ": "));
1600 } else {
1601 ND_PRINT((ndo, " (%s): ", etheraddr_string(ndo, src)));
1602 }
1603 switch (p[0]) {
1604 case 0: ND_PRINT((ndo, "Spectrum Management Act#%d", p[1])); break;
1605 case 1: ND_PRINT((ndo, "QoS Act#%d", p[1])); break;
1606 case 2: ND_PRINT((ndo, "DLS Act#%d", p[1])); break;
1607 case 3: ND_PRINT((ndo, "BA ")); PRINT_BA_ACTION(p[1]); break;
1608 case 7: ND_PRINT((ndo, "HT ")); PRINT_HT_ACTION(p[1]); break;
1609 case 13: ND_PRINT((ndo, "MeshAction ")); PRINT_MESH_ACTION(p[1]); break;
1610 case 14:
1611 ND_PRINT((ndo, "MultiohopAction "));
1612 PRINT_MULTIHOP_ACTION(p[1]); break;
1613 case 15:
1614 ND_PRINT((ndo, "SelfprotectAction "));
1615 PRINT_SELFPROT_ACTION(p[1]); break;
1616 case 127: ND_PRINT((ndo, "Vendor Act#%d", p[1])); break;
1617 default:
1618 ND_PRINT((ndo, "Reserved(%d) Act#%d", p[0], p[1]));
1619 break;
1620 }
1621 return 1;
1622 }
1623
1624
1625 /*********************************************************************************
1626 * Print Body funcs
1627 *********************************************************************************/
1628
1629
1630 static int
1631 mgmt_body_print(netdissect_options *ndo,
1632 uint16_t fc, const uint8_t *src, const u_char *p, u_int length)
1633 {
1634 ND_PRINT((ndo, "%s", tok2str(st_str, "Unhandled Management subtype(%x)", FC_SUBTYPE(fc))));
1635
1636 /* There may be a problem w/ AP not having this bit set */
1637 if (FC_PROTECTED(fc))
1638 return wep_print(ndo, p);
1639 switch (FC_SUBTYPE(fc)) {
1640 case ST_ASSOC_REQUEST:
1641 return handle_assoc_request(ndo, p, length);
1642 case ST_ASSOC_RESPONSE:
1643 return handle_assoc_response(ndo, p, length);
1644 case ST_REASSOC_REQUEST:
1645 return handle_reassoc_request(ndo, p, length);
1646 case ST_REASSOC_RESPONSE:
1647 return handle_reassoc_response(ndo, p, length);
1648 case ST_PROBE_REQUEST:
1649 return handle_probe_request(ndo, p, length);
1650 case ST_PROBE_RESPONSE:
1651 return handle_probe_response(ndo, p, length);
1652 case ST_BEACON:
1653 return handle_beacon(ndo, p, length);
1654 case ST_ATIM:
1655 return handle_atim();
1656 case ST_DISASSOC:
1657 return handle_disassoc(ndo, p, length);
1658 case ST_AUTH:
1659 return handle_auth(ndo, p, length);
1660 case ST_DEAUTH:
1661 return handle_deauth(ndo, src, p, length);
1662 case ST_ACTION:
1663 return handle_action(ndo, src, p, length);
1664 default:
1665 return 1;
1666 }
1667 }
1668
1669
1670 /*********************************************************************************
1671 * Handles printing all the control frame types
1672 *********************************************************************************/
1673
1674 static int
1675 ctrl_body_print(netdissect_options *ndo,
1676 uint16_t fc, const u_char *p)
1677 {
1678 ND_PRINT((ndo, "%s", tok2str(ctrl_str, "Unknown Ctrl Subtype", FC_SUBTYPE(fc))));
1679 switch (FC_SUBTYPE(fc)) {
1680 case CTRL_CONTROL_WRAPPER:
1681 /* XXX - requires special handling */
1682 break;
1683 case CTRL_BAR:
1684 if (!ND_TTEST2(*p, CTRL_BAR_HDRLEN))
1685 return 0;
1686 if (!ndo->ndo_eflag)
1687 ND_PRINT((ndo, " RA:%s TA:%s CTL(%x) SEQ(%u) ",
1688 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ra),
1689 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ta),
1690 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_hdr_t *)p)->ctl)),
1691 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_hdr_t *)p)->seq))));
1692 break;
1693 case CTRL_BA:
1694 if (!ND_TTEST2(*p, CTRL_BA_HDRLEN))
1695 return 0;
1696 if (!ndo->ndo_eflag)
1697 ND_PRINT((ndo, " RA:%s ",
1698 etheraddr_string(ndo, ((const struct ctrl_ba_hdr_t *)p)->ra)));
1699 break;
1700 case CTRL_PS_POLL:
1701 if (!ND_TTEST2(*p, CTRL_PS_POLL_HDRLEN))
1702 return 0;
1703 ND_PRINT((ndo, " AID(%x)",
1704 EXTRACT_LE_16BITS(&(((const struct ctrl_ps_poll_hdr_t *)p)->aid))));
1705 break;
1706 case CTRL_RTS:
1707 if (!ND_TTEST2(*p, CTRL_RTS_HDRLEN))
1708 return 0;
1709 if (!ndo->ndo_eflag)
1710 ND_PRINT((ndo, " TA:%s ",
1711 etheraddr_string(ndo, ((const struct ctrl_rts_hdr_t *)p)->ta)));
1712 break;
1713 case CTRL_CTS:
1714 if (!ND_TTEST2(*p, CTRL_CTS_HDRLEN))
1715 return 0;
1716 if (!ndo->ndo_eflag)
1717 ND_PRINT((ndo, " RA:%s ",
1718 etheraddr_string(ndo, ((const struct ctrl_cts_hdr_t *)p)->ra)));
1719 break;
1720 case CTRL_ACK:
1721 if (!ND_TTEST2(*p, CTRL_ACK_HDRLEN))
1722 return 0;
1723 if (!ndo->ndo_eflag)
1724 ND_PRINT((ndo, " RA:%s ",
1725 etheraddr_string(ndo, ((const struct ctrl_ack_hdr_t *)p)->ra)));
1726 break;
1727 case CTRL_CF_END:
1728 if (!ND_TTEST2(*p, CTRL_END_HDRLEN))
1729 return 0;
1730 if (!ndo->ndo_eflag)
1731 ND_PRINT((ndo, " RA:%s ",
1732 etheraddr_string(ndo, ((const struct ctrl_end_hdr_t *)p)->ra)));
1733 break;
1734 case CTRL_END_ACK:
1735 if (!ND_TTEST2(*p, CTRL_END_ACK_HDRLEN))
1736 return 0;
1737 if (!ndo->ndo_eflag)
1738 ND_PRINT((ndo, " RA:%s ",
1739 etheraddr_string(ndo, ((const struct ctrl_end_ack_hdr_t *)p)->ra)));
1740 break;
1741 }
1742 return 1;
1743 }
1744
1745 /*
1746 * Data Frame - Address field contents
1747 *
1748 * To Ds | From DS | Addr 1 | Addr 2 | Addr 3 | Addr 4
1749 * 0 | 0 | DA | SA | BSSID | n/a
1750 * 0 | 1 | DA | BSSID | SA | n/a
1751 * 1 | 0 | BSSID | SA | DA | n/a
1752 * 1 | 1 | RA | TA | DA | SA
1753 */
1754
1755 /*
1756 * Function to get source and destination MAC addresses for a data frame.
1757 */
1758 static void
1759 get_data_src_dst_mac(uint16_t fc, const u_char *p, const uint8_t **srcp,
1760 const uint8_t **dstp)
1761 {
1762 #define ADDR1 (p + 4)
1763 #define ADDR2 (p + 10)
1764 #define ADDR3 (p + 16)
1765 #define ADDR4 (p + 24)
1766
1767 if (!FC_TO_DS(fc)) {
1768 if (!FC_FROM_DS(fc)) {
1769 /* not To DS and not From DS */
1770 *srcp = ADDR2;
1771 *dstp = ADDR1;
1772 } else {
1773 /* not To DS and From DS */
1774 *srcp = ADDR3;
1775 *dstp = ADDR1;
1776 }
1777 } else {
1778 if (!FC_FROM_DS(fc)) {
1779 /* From DS and not To DS */
1780 *srcp = ADDR2;
1781 *dstp = ADDR3;
1782 } else {
1783 /* To DS and From DS */
1784 *srcp = ADDR4;
1785 *dstp = ADDR3;
1786 }
1787 }
1788
1789 #undef ADDR1
1790 #undef ADDR2
1791 #undef ADDR3
1792 #undef ADDR4
1793 }
1794
1795 static void
1796 get_mgmt_src_dst_mac(const u_char *p, const uint8_t **srcp, const uint8_t **dstp)
1797 {
1798 const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p;
1799
1800 if (srcp != NULL)
1801 *srcp = hp->sa;
1802 if (dstp != NULL)
1803 *dstp = hp->da;
1804 }
1805
1806 /*
1807 * Print Header funcs
1808 */
1809
1810 static void
1811 data_header_print(netdissect_options *ndo, uint16_t fc, const u_char *p)
1812 {
1813 u_int subtype = FC_SUBTYPE(fc);
1814
1815 if (DATA_FRAME_IS_CF_ACK(subtype) || DATA_FRAME_IS_CF_POLL(subtype) ||
1816 DATA_FRAME_IS_QOS(subtype)) {
1817 ND_PRINT((ndo, "CF "));
1818 if (DATA_FRAME_IS_CF_ACK(subtype)) {
1819 if (DATA_FRAME_IS_CF_POLL(subtype))
1820 ND_PRINT((ndo, "Ack/Poll"));
1821 else
1822 ND_PRINT((ndo, "Ack"));
1823 } else {
1824 if (DATA_FRAME_IS_CF_POLL(subtype))
1825 ND_PRINT((ndo, "Poll"));
1826 }
1827 if (DATA_FRAME_IS_QOS(subtype))
1828 ND_PRINT((ndo, "+QoS"));
1829 ND_PRINT((ndo, " "));
1830 }
1831
1832 #define ADDR1 (p + 4)
1833 #define ADDR2 (p + 10)
1834 #define ADDR3 (p + 16)
1835 #define ADDR4 (p + 24)
1836
1837 if (!FC_TO_DS(fc) && !FC_FROM_DS(fc)) {
1838 ND_PRINT((ndo, "DA:%s SA:%s BSSID:%s ",
1839 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1840 etheraddr_string(ndo, ADDR3)));
1841 } else if (!FC_TO_DS(fc) && FC_FROM_DS(fc)) {
1842 ND_PRINT((ndo, "DA:%s BSSID:%s SA:%s ",
1843 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1844 etheraddr_string(ndo, ADDR3)));
1845 } else if (FC_TO_DS(fc) && !FC_FROM_DS(fc)) {
1846 ND_PRINT((ndo, "BSSID:%s SA:%s DA:%s ",
1847 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1848 etheraddr_string(ndo, ADDR3)));
1849 } else if (FC_TO_DS(fc) && FC_FROM_DS(fc)) {
1850 ND_PRINT((ndo, "RA:%s TA:%s DA:%s SA:%s ",
1851 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2),
1852 etheraddr_string(ndo, ADDR3), etheraddr_string(ndo, ADDR4)));
1853 }
1854
1855 #undef ADDR1
1856 #undef ADDR2
1857 #undef ADDR3
1858 #undef ADDR4
1859 }
1860
1861 static void
1862 mgmt_header_print(netdissect_options *ndo, const u_char *p)
1863 {
1864 const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p;
1865
1866 ND_PRINT((ndo, "BSSID:%s DA:%s SA:%s ",
1867 etheraddr_string(ndo, (hp)->bssid), etheraddr_string(ndo, (hp)->da),
1868 etheraddr_string(ndo, (hp)->sa)));
1869 }
1870
1871 static void
1872 ctrl_header_print(netdissect_options *ndo, uint16_t fc, const u_char *p)
1873 {
1874 switch (FC_SUBTYPE(fc)) {
1875 case CTRL_BAR:
1876 ND_PRINT((ndo, " RA:%s TA:%s CTL(%x) SEQ(%u) ",
1877 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ra),
1878 etheraddr_string(ndo, ((const struct ctrl_bar_hdr_t *)p)->ta),
1879 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_hdr_t *)p)->ctl)),
1880 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_hdr_t *)p)->seq))));
1881 break;
1882 case CTRL_BA:
1883 ND_PRINT((ndo, "RA:%s ",
1884 etheraddr_string(ndo, ((const struct ctrl_ba_hdr_t *)p)->ra)));
1885 break;
1886 case CTRL_PS_POLL:
1887 ND_PRINT((ndo, "BSSID:%s TA:%s ",
1888 etheraddr_string(ndo, ((const struct ctrl_ps_poll_hdr_t *)p)->bssid),
1889 etheraddr_string(ndo, ((const struct ctrl_ps_poll_hdr_t *)p)->ta)));
1890 break;
1891 case CTRL_RTS:
1892 ND_PRINT((ndo, "RA:%s TA:%s ",
1893 etheraddr_string(ndo, ((const struct ctrl_rts_hdr_t *)p)->ra),
1894 etheraddr_string(ndo, ((const struct ctrl_rts_hdr_t *)p)->ta)));
1895 break;
1896 case CTRL_CTS:
1897 ND_PRINT((ndo, "RA:%s ",
1898 etheraddr_string(ndo, ((const struct ctrl_cts_hdr_t *)p)->ra)));
1899 break;
1900 case CTRL_ACK:
1901 ND_PRINT((ndo, "RA:%s ",
1902 etheraddr_string(ndo, ((const struct ctrl_ack_hdr_t *)p)->ra)));
1903 break;
1904 case CTRL_CF_END:
1905 ND_PRINT((ndo, "RA:%s BSSID:%s ",
1906 etheraddr_string(ndo, ((const struct ctrl_end_hdr_t *)p)->ra),
1907 etheraddr_string(ndo, ((const struct ctrl_end_hdr_t *)p)->bssid)));
1908 break;
1909 case CTRL_END_ACK:
1910 ND_PRINT((ndo, "RA:%s BSSID:%s ",
1911 etheraddr_string(ndo, ((const struct ctrl_end_ack_hdr_t *)p)->ra),
1912 etheraddr_string(ndo, ((const struct ctrl_end_ack_hdr_t *)p)->bssid)));
1913 break;
1914 default:
1915 /* We shouldn't get here - we should already have quit */
1916 break;
1917 }
1918 }
1919
1920 static int
1921 extract_header_length(netdissect_options *ndo,
1922 uint16_t fc)
1923 {
1924 int len;
1925
1926 switch (FC_TYPE(fc)) {
1927 case T_MGMT:
1928 return MGMT_HDRLEN;
1929 case T_CTRL:
1930 switch (FC_SUBTYPE(fc)) {
1931 case CTRL_CONTROL_WRAPPER:
1932 return CTRL_CONTROL_WRAPPER_HDRLEN;
1933 case CTRL_BAR:
1934 return CTRL_BAR_HDRLEN;
1935 case CTRL_BA:
1936 return CTRL_BA_HDRLEN;
1937 case CTRL_PS_POLL:
1938 return CTRL_PS_POLL_HDRLEN;
1939 case CTRL_RTS:
1940 return CTRL_RTS_HDRLEN;
1941 case CTRL_CTS:
1942 return CTRL_CTS_HDRLEN;
1943 case CTRL_ACK:
1944 return CTRL_ACK_HDRLEN;
1945 case CTRL_CF_END:
1946 return CTRL_END_HDRLEN;
1947 case CTRL_END_ACK:
1948 return CTRL_END_ACK_HDRLEN;
1949 default:
1950 ND_PRINT((ndo, "unknown 802.11 ctrl frame subtype (%d)", FC_SUBTYPE(fc)));
1951 return 0;
1952 }
1953 case T_DATA:
1954 len = (FC_TO_DS(fc) && FC_FROM_DS(fc)) ? 30 : 24;
1955 if (DATA_FRAME_IS_QOS(FC_SUBTYPE(fc)))
1956 len += 2;
1957 return len;
1958 default:
1959 ND_PRINT((ndo, "unknown 802.11 frame type (%d)", FC_TYPE(fc)));
1960 return 0;
1961 }
1962 }
1963
1964 static int
1965 extract_mesh_header_length(const u_char *p)
1966 {
1967 return (p[0] &~ 3) ? 0 : 6*(1 + (p[0] & 3));
1968 }
1969
1970 /*
1971 * Print the 802.11 MAC header.
1972 */
1973 static void
1974 ieee_802_11_hdr_print(netdissect_options *ndo,
1975 uint16_t fc, const u_char *p, u_int hdrlen,
1976 u_int meshdrlen)
1977 {
1978 if (ndo->ndo_vflag) {
1979 if (FC_MORE_DATA(fc))
1980 ND_PRINT((ndo, "More Data "));
1981 if (FC_MORE_FLAG(fc))
1982 ND_PRINT((ndo, "More Fragments "));
1983 if (FC_POWER_MGMT(fc))
1984 ND_PRINT((ndo, "Pwr Mgmt "));
1985 if (FC_RETRY(fc))
1986 ND_PRINT((ndo, "Retry "));
1987 if (FC_ORDER(fc))
1988 ND_PRINT((ndo, "Strictly Ordered "));
1989 if (FC_PROTECTED(fc))
1990 ND_PRINT((ndo, "Protected "));
1991 if (FC_TYPE(fc) != T_CTRL || FC_SUBTYPE(fc) != CTRL_PS_POLL)
1992 ND_PRINT((ndo, "%dus ",
1993 EXTRACT_LE_16BITS(
1994 &((const struct mgmt_header_t *)p)->duration)));
1995 }
1996 if (meshdrlen != 0) {
1997 const struct meshcntl_t *mc =
1998 (const struct meshcntl_t *)&p[hdrlen - meshdrlen];
1999 int ae = mc->flags & 3;
2000
2001 ND_PRINT((ndo, "MeshData (AE %d TTL %u seq %u", ae, mc->ttl,
2002 EXTRACT_LE_32BITS(mc->seq)));
2003 if (ae > 0)
2004 ND_PRINT((ndo, " A4:%s", etheraddr_string(ndo, mc->addr4)));
2005 if (ae > 1)
2006 ND_PRINT((ndo, " A5:%s", etheraddr_string(ndo, mc->addr5)));
2007 if (ae > 2)
2008 ND_PRINT((ndo, " A6:%s", etheraddr_string(ndo, mc->addr6)));
2009 ND_PRINT((ndo, ") "));
2010 }
2011
2012 switch (FC_TYPE(fc)) {
2013 case T_MGMT:
2014 mgmt_header_print(ndo, p);
2015 break;
2016 case T_CTRL:
2017 ctrl_header_print(ndo, fc, p);
2018 break;
2019 case T_DATA:
2020 data_header_print(ndo, fc, p);
2021 break;
2022 default:
2023 break;
2024 }
2025 }
2026
2027 #ifndef roundup2
2028 #define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
2029 #endif
2030
2031 static const char tstr[] = "[|802.11]";
2032
2033 static u_int
2034 ieee802_11_print(netdissect_options *ndo,
2035 const u_char *p, u_int length, u_int orig_caplen, int pad,
2036 u_int fcslen)
2037 {
2038 uint16_t fc;
2039 u_int caplen, hdrlen, meshdrlen;
2040 const uint8_t *src, *dst;
2041 int llc_hdrlen;
2042
2043 caplen = orig_caplen;
2044 /* Remove FCS, if present */
2045 if (length < fcslen) {
2046 ND_PRINT((ndo, "%s", tstr));
2047 return caplen;
2048 }
2049 length -= fcslen;
2050 if (caplen > length) {
2051 /* Amount of FCS in actual packet data, if any */
2052 fcslen = caplen - length;
2053 caplen -= fcslen;
2054 ndo->ndo_snapend -= fcslen;
2055 }
2056
2057 if (caplen < IEEE802_11_FC_LEN) {
2058 ND_PRINT((ndo, "%s", tstr));
2059 return orig_caplen;
2060 }
2061
2062 fc = EXTRACT_LE_16BITS(p);
2063 hdrlen = extract_header_length(ndo, fc);
2064 if (hdrlen == 0) {
2065 /* Unknown frame type or control frame subtype; quit. */
2066 return (0);
2067 }
2068 if (pad)
2069 hdrlen = roundup2(hdrlen, 4);
2070 if (ndo->ndo_Hflag && FC_TYPE(fc) == T_DATA &&
2071 DATA_FRAME_IS_QOS(FC_SUBTYPE(fc))) {
2072 meshdrlen = extract_mesh_header_length(p+hdrlen);
2073 hdrlen += meshdrlen;
2074 } else
2075 meshdrlen = 0;
2076
2077 if (caplen < hdrlen) {
2078 ND_PRINT((ndo, "%s", tstr));
2079 return hdrlen;
2080 }
2081
2082 if (ndo->ndo_eflag)
2083 ieee_802_11_hdr_print(ndo, fc, p, hdrlen, meshdrlen);
2084
2085 /*
2086 * Go past the 802.11 header.
2087 */
2088 length -= hdrlen;
2089 caplen -= hdrlen;
2090 p += hdrlen;
2091
2092 switch (FC_TYPE(fc)) {
2093 case T_MGMT:
2094 get_mgmt_src_dst_mac(p - hdrlen, &src, &dst);
2095 if (!mgmt_body_print(ndo, fc, src, p, length)) {
2096 ND_PRINT((ndo, "%s", tstr));
2097 return hdrlen;
2098 }
2099 break;
2100 case T_CTRL:
2101 if (!ctrl_body_print(ndo, fc, p - hdrlen)) {
2102 ND_PRINT((ndo, "%s", tstr));
2103 return hdrlen;
2104 }
2105 break;
2106 case T_DATA:
2107 if (DATA_FRAME_IS_NULL(FC_SUBTYPE(fc)))
2108 return hdrlen; /* no-data frame */
2109 /* There may be a problem w/ AP not having this bit set */
2110 if (FC_PROTECTED(fc)) {
2111 ND_PRINT((ndo, "Data"));
2112 if (!wep_print(ndo, p)) {
2113 ND_PRINT((ndo, "%s", tstr));
2114 return hdrlen;
2115 }
2116 } else {
2117 get_data_src_dst_mac(fc, p - hdrlen, &src, &dst);
2118 llc_hdrlen = llc_print(ndo, p, length, caplen, src, dst);
2119 if (llc_hdrlen < 0) {
2120 /*
2121 * Some kinds of LLC packet we cannot
2122 * handle intelligently
2123 */
2124 if (!ndo->ndo_suppress_default_print)
2125 ND_DEFAULTPRINT(p, caplen);
2126 llc_hdrlen = -llc_hdrlen;
2127 }
2128 hdrlen += llc_hdrlen;
2129 }
2130 break;
2131 default:
2132 /* We shouldn't get here - we should already have quit */
2133 break;
2134 }
2135
2136 return hdrlen;
2137 }
2138
2139 /*
2140 * This is the top level routine of the printer. 'p' points
2141 * to the 802.11 header of the packet, 'h->ts' is the timestamp,
2142 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
2143 * is the number of bytes actually captured.
2144 */
2145 u_int
2146 ieee802_11_if_print(netdissect_options *ndo,
2147 const struct pcap_pkthdr *h, const u_char *p)
2148 {
2149 return ieee802_11_print(ndo, p, h->len, h->caplen, 0, 0);
2150 }
2151
2152
2153 /* $FreeBSD: src/sys/net80211/ieee80211_radiotap.h,v 1.5 2005/01/22 20:12:05 sam Exp $ */
2154 /* NetBSD: ieee802_11_radio.h,v 1.2 2006/02/26 03:04:03 dyoung Exp */
2155
2156 /*-
2157 * Copyright (c) 2003, 2004 David Young. All rights reserved.
2158 *
2159 * Redistribution and use in source and binary forms, with or without
2160 * modification, are permitted provided that the following conditions
2161 * are met:
2162 * 1. Redistributions of source code must retain the above copyright
2163 * notice, this list of conditions and the following disclaimer.
2164 * 2. Redistributions in binary form must reproduce the above copyright
2165 * notice, this list of conditions and the following disclaimer in the
2166 * documentation and/or other materials provided with the distribution.
2167 * 3. The name of David Young may not be used to endorse or promote
2168 * products derived from this software without specific prior
2169 * written permission.
2170 *
2171 * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
2172 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
2173 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
2174 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID
2175 * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
2176 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
2177 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
2178 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
2179 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
2180 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2181 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
2182 * OF SUCH DAMAGE.
2183 */
2184
2185 /* A generic radio capture format is desirable. It must be
2186 * rigidly defined (e.g., units for fields should be given),
2187 * and easily extensible.
2188 *
2189 * The following is an extensible radio capture format. It is
2190 * based on a bitmap indicating which fields are present.
2191 *
2192 * I am trying to describe precisely what the application programmer
2193 * should expect in the following, and for that reason I tell the
2194 * units and origin of each measurement (where it applies), or else I
2195 * use sufficiently weaselly language ("is a monotonically nondecreasing
2196 * function of...") that I cannot set false expectations for lawyerly
2197 * readers.
2198 */
2199
2200 /*
2201 * The radio capture header precedes the 802.11 header.
2202 *
2203 * Note well: all radiotap fields are little-endian.
2204 */
2205 struct ieee80211_radiotap_header {
2206 uint8_t it_version; /* Version 0. Only increases
2207 * for drastic changes,
2208 * introduction of compatible
2209 * new fields does not count.
2210 */
2211 uint8_t it_pad;
2212 uint16_t it_len; /* length of the whole
2213 * header in bytes, including
2214 * it_version, it_pad,
2215 * it_len, and data fields.
2216 */
2217 uint32_t it_present; /* A bitmap telling which
2218 * fields are present. Set bit 31
2219 * (0x80000000) to extend the
2220 * bitmap by another 32 bits.
2221 * Additional extensions are made
2222 * by setting bit 31.
2223 */
2224 };
2225
2226 /* Name Data type Units
2227 * ---- --------- -----
2228 *
2229 * IEEE80211_RADIOTAP_TSFT uint64_t microseconds
2230 *
2231 * Value in microseconds of the MAC's 64-bit 802.11 Time
2232 * Synchronization Function timer when the first bit of the
2233 * MPDU arrived at the MAC. For received frames, only.
2234 *
2235 * IEEE80211_RADIOTAP_CHANNEL 2 x uint16_t MHz, bitmap
2236 *
2237 * Tx/Rx frequency in MHz, followed by flags (see below).
2238 * Note that IEEE80211_RADIOTAP_XCHANNEL must be used to
2239 * represent an HT channel as there is not enough room in
2240 * the flags word.
2241 *
2242 * IEEE80211_RADIOTAP_FHSS uint16_t see below
2243 *
2244 * For frequency-hopping radios, the hop set (first byte)
2245 * and pattern (second byte).
2246 *
2247 * IEEE80211_RADIOTAP_RATE uint8_t 500kb/s or index
2248 *
2249 * Tx/Rx data rate. If bit 0x80 is set then it represents an
2250 * an MCS index and not an IEEE rate.
2251 *
2252 * IEEE80211_RADIOTAP_DBM_ANTSIGNAL int8_t decibels from
2253 * one milliwatt (dBm)
2254 *
2255 * RF signal power at the antenna, decibel difference from
2256 * one milliwatt.
2257 *
2258 * IEEE80211_RADIOTAP_DBM_ANTNOISE int8_t decibels from
2259 * one milliwatt (dBm)
2260 *
2261 * RF noise power at the antenna, decibel difference from one
2262 * milliwatt.
2263 *
2264 * IEEE80211_RADIOTAP_DB_ANTSIGNAL uint8_t decibel (dB)
2265 *
2266 * RF signal power at the antenna, decibel difference from an
2267 * arbitrary, fixed reference.
2268 *
2269 * IEEE80211_RADIOTAP_DB_ANTNOISE uint8_t decibel (dB)
2270 *
2271 * RF noise power at the antenna, decibel difference from an
2272 * arbitrary, fixed reference point.
2273 *
2274 * IEEE80211_RADIOTAP_LOCK_QUALITY uint16_t unitless
2275 *
2276 * Quality of Barker code lock. Unitless. Monotonically
2277 * nondecreasing with "better" lock strength. Called "Signal
2278 * Quality" in datasheets. (Is there a standard way to measure
2279 * this?)
2280 *
2281 * IEEE80211_RADIOTAP_TX_ATTENUATION uint16_t unitless
2282 *
2283 * Transmit power expressed as unitless distance from max
2284 * power set at factory calibration. 0 is max power.
2285 * Monotonically nondecreasing with lower power levels.
2286 *
2287 * IEEE80211_RADIOTAP_DB_TX_ATTENUATION uint16_t decibels (dB)
2288 *
2289 * Transmit power expressed as decibel distance from max power
2290 * set at factory calibration. 0 is max power. Monotonically
2291 * nondecreasing with lower power levels.
2292 *
2293 * IEEE80211_RADIOTAP_DBM_TX_POWER int8_t decibels from
2294 * one milliwatt (dBm)
2295 *
2296 * Transmit power expressed as dBm (decibels from a 1 milliwatt
2297 * reference). This is the absolute power level measured at
2298 * the antenna port.
2299 *
2300 * IEEE80211_RADIOTAP_FLAGS uint8_t bitmap
2301 *
2302 * Properties of transmitted and received frames. See flags
2303 * defined below.
2304 *
2305 * IEEE80211_RADIOTAP_ANTENNA uint8_t antenna index
2306 *
2307 * Unitless indication of the Rx/Tx antenna for this packet.
2308 * The first antenna is antenna 0.
2309 *
2310 * IEEE80211_RADIOTAP_RX_FLAGS uint16_t bitmap
2311 *
2312 * Properties of received frames. See flags defined below.
2313 *
2314 * IEEE80211_RADIOTAP_XCHANNEL uint32_t bitmap
2315 * uint16_t MHz
2316 * uint8_t channel number
2317 * uint8_t .5 dBm
2318 *
2319 * Extended channel specification: flags (see below) followed by
2320 * frequency in MHz, the corresponding IEEE channel number, and
2321 * finally the maximum regulatory transmit power cap in .5 dBm
2322 * units. This property supersedes IEEE80211_RADIOTAP_CHANNEL
2323 * and only one of the two should be present.
2324 *
2325 * IEEE80211_RADIOTAP_MCS uint8_t known
2326 * uint8_t flags
2327 * uint8_t mcs
2328 *
2329 * Bitset indicating which fields have known values, followed
2330 * by bitset of flag values, followed by the MCS rate index as
2331 * in IEEE 802.11n.
2332 *
2333 * IEEE80211_RADIOTAP_VENDOR_NAMESPACE
2334 * uint8_t OUI[3]
2335 * uint8_t subspace
2336 * uint16_t length
2337 *
2338 * The Vendor Namespace Field contains three sub-fields. The first
2339 * sub-field is 3 bytes long. It contains the vendor's IEEE 802
2340 * Organizationally Unique Identifier (OUI). The fourth byte is a
2341 * vendor-specific "namespace selector."
2342 *
2343 */
2344 enum ieee80211_radiotap_type {
2345 IEEE80211_RADIOTAP_TSFT = 0,
2346 IEEE80211_RADIOTAP_FLAGS = 1,
2347 IEEE80211_RADIOTAP_RATE = 2,
2348 IEEE80211_RADIOTAP_CHANNEL = 3,
2349 IEEE80211_RADIOTAP_FHSS = 4,
2350 IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5,
2351 IEEE80211_RADIOTAP_DBM_ANTNOISE = 6,
2352 IEEE80211_RADIOTAP_LOCK_QUALITY = 7,
2353 IEEE80211_RADIOTAP_TX_ATTENUATION = 8,
2354 IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9,
2355 IEEE80211_RADIOTAP_DBM_TX_POWER = 10,
2356 IEEE80211_RADIOTAP_ANTENNA = 11,
2357 IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
2358 IEEE80211_RADIOTAP_DB_ANTNOISE = 13,
2359 IEEE80211_RADIOTAP_RX_FLAGS = 14,
2360 /* NB: gap for netbsd definitions */
2361 IEEE80211_RADIOTAP_XCHANNEL = 18,
2362 IEEE80211_RADIOTAP_MCS = 19,
2363 IEEE80211_RADIOTAP_NAMESPACE = 29,
2364 IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30,
2365 IEEE80211_RADIOTAP_EXT = 31
2366 };
2367
2368 /* channel attributes */
2369 #define IEEE80211_CHAN_TURBO 0x00010 /* Turbo channel */
2370 #define IEEE80211_CHAN_CCK 0x00020 /* CCK channel */
2371 #define IEEE80211_CHAN_OFDM 0x00040 /* OFDM channel */
2372 #define IEEE80211_CHAN_2GHZ 0x00080 /* 2 GHz spectrum channel. */
2373 #define IEEE80211_CHAN_5GHZ 0x00100 /* 5 GHz spectrum channel */
2374 #define IEEE80211_CHAN_PASSIVE 0x00200 /* Only passive scan allowed */
2375 #define IEEE80211_CHAN_DYN 0x00400 /* Dynamic CCK-OFDM channel */
2376 #define IEEE80211_CHAN_GFSK 0x00800 /* GFSK channel (FHSS PHY) */
2377 #define IEEE80211_CHAN_GSM 0x01000 /* 900 MHz spectrum channel */
2378 #define IEEE80211_CHAN_STURBO 0x02000 /* 11a static turbo channel only */
2379 #define IEEE80211_CHAN_HALF 0x04000 /* Half rate channel */
2380 #define IEEE80211_CHAN_QUARTER 0x08000 /* Quarter rate channel */
2381 #define IEEE80211_CHAN_HT20 0x10000 /* HT 20 channel */
2382 #define IEEE80211_CHAN_HT40U 0x20000 /* HT 40 channel w/ ext above */
2383 #define IEEE80211_CHAN_HT40D 0x40000 /* HT 40 channel w/ ext below */
2384
2385 /* Useful combinations of channel characteristics, borrowed from Ethereal */
2386 #define IEEE80211_CHAN_A \
2387 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM)
2388 #define IEEE80211_CHAN_B \
2389 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK)
2390 #define IEEE80211_CHAN_G \
2391 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN)
2392 #define IEEE80211_CHAN_TA \
2393 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO)
2394 #define IEEE80211_CHAN_TG \
2395 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN | IEEE80211_CHAN_TURBO)
2396
2397
2398 /* For IEEE80211_RADIOTAP_FLAGS */
2399 #define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received
2400 * during CFP
2401 */
2402 #define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received
2403 * with short
2404 * preamble
2405 */
2406 #define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received
2407 * with WEP encryption
2408 */
2409 #define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received
2410 * with fragmentation
2411 */
2412 #define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */
2413 #define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between
2414 * 802.11 header and payload
2415 * (to 32-bit boundary)
2416 */
2417 #define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* does not pass FCS check */
2418
2419 /* For IEEE80211_RADIOTAP_RX_FLAGS */
2420 #define IEEE80211_RADIOTAP_F_RX_BADFCS 0x0001 /* frame failed crc check */
2421 #define IEEE80211_RADIOTAP_F_RX_PLCP_CRC 0x0002 /* frame failed PLCP CRC check */
2422
2423 /* For IEEE80211_RADIOTAP_MCS known */
2424 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN 0x01
2425 #define IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN 0x02 /* MCS index field */
2426 #define IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN 0x04
2427 #define IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN 0x08
2428 #define IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN 0x10
2429 #define IEEE80211_RADIOTAP_MCS_STBC_KNOWN 0x20
2430
2431 /* For IEEE80211_RADIOTAP_MCS flags */
2432 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK 0x03
2433 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20 0
2434 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 1
2435 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20L 2
2436 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20U 3
2437 #define IEEE80211_RADIOTAP_MCS_SHORT_GI 0x04 /* short guard interval */
2438 #define IEEE80211_RADIOTAP_MCS_HT_GREENFIELD 0x08
2439 #define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10
2440 #define IEEE80211_RADIOTAP_MCS_STBC_MASK 0x60
2441 #define IEEE80211_RADIOTAP_MCS_STBC_1 1
2442 #define IEEE80211_RADIOTAP_MCS_STBC_2 2
2443 #define IEEE80211_RADIOTAP_MCS_STBC_3 3
2444 #define IEEE80211_RADIOTAP_MCS_STBC_SHIFT 5
2445
2446 /* Radiotap state */
2447 /* This is used to save state when parsing/processing parameters */
2448 struct radiotap_state
2449 {
2450 uint32_t present;
2451
2452 uint8_t rate;
2453 };
2454
2455 #define IEEE80211_CHAN_FHSS \
2456 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_GFSK)
2457 #define IEEE80211_CHAN_A \
2458 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM)
2459 #define IEEE80211_CHAN_B \
2460 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK)
2461 #define IEEE80211_CHAN_PUREG \
2462 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM)
2463 #define IEEE80211_CHAN_G \
2464 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN)
2465
2466 #define IS_CHAN_FHSS(flags) \
2467 ((flags & IEEE80211_CHAN_FHSS) == IEEE80211_CHAN_FHSS)
2468 #define IS_CHAN_A(flags) \
2469 ((flags & IEEE80211_CHAN_A) == IEEE80211_CHAN_A)
2470 #define IS_CHAN_B(flags) \
2471 ((flags & IEEE80211_CHAN_B) == IEEE80211_CHAN_B)
2472 #define IS_CHAN_PUREG(flags) \
2473 ((flags & IEEE80211_CHAN_PUREG) == IEEE80211_CHAN_PUREG)
2474 #define IS_CHAN_G(flags) \
2475 ((flags & IEEE80211_CHAN_G) == IEEE80211_CHAN_G)
2476 #define IS_CHAN_ANYG(flags) \
2477 (IS_CHAN_PUREG(flags) || IS_CHAN_G(flags))
2478
2479 static void
2480 print_chaninfo(netdissect_options *ndo,
2481 int freq, int flags)
2482 {
2483 ND_PRINT((ndo, "%u MHz", freq));
2484 if (IS_CHAN_FHSS(flags))
2485 ND_PRINT((ndo, " FHSS"));
2486 if (IS_CHAN_A(flags)) {
2487 if (flags & IEEE80211_CHAN_HALF)
2488 ND_PRINT((ndo, " 11a/10Mhz"));
2489 else if (flags & IEEE80211_CHAN_QUARTER)
2490 ND_PRINT((ndo, " 11a/5Mhz"));
2491 else
2492 ND_PRINT((ndo, " 11a"));
2493 }
2494 if (IS_CHAN_ANYG(flags)) {
2495 if (flags & IEEE80211_CHAN_HALF)
2496 ND_PRINT((ndo, " 11g/10Mhz"));
2497 else if (flags & IEEE80211_CHAN_QUARTER)
2498 ND_PRINT((ndo, " 11g/5Mhz"));
2499 else
2500 ND_PRINT((ndo, " 11g"));
2501 } else if (IS_CHAN_B(flags))
2502 ND_PRINT((ndo, " 11b"));
2503 if (flags & IEEE80211_CHAN_TURBO)
2504 ND_PRINT((ndo, " Turbo"));
2505 if (flags & IEEE80211_CHAN_HT20)
2506 ND_PRINT((ndo, " ht/20"));
2507 else if (flags & IEEE80211_CHAN_HT40D)
2508 ND_PRINT((ndo, " ht/40-"));
2509 else if (flags & IEEE80211_CHAN_HT40U)
2510 ND_PRINT((ndo, " ht/40+"));
2511 ND_PRINT((ndo, " "));
2512 }
2513
2514 static int
2515 print_radiotap_field(netdissect_options *ndo,
2516 struct cpack_state *s, uint32_t bit, uint8_t *flags,
2517 struct radiotap_state *state, uint32_t presentflags)
2518 {
2519 union {
2520 int8_t i8;
2521 uint8_t u8;
2522 int16_t i16;
2523 uint16_t u16;
2524 uint32_t u32;
2525 uint64_t u64;
2526 } u, u2, u3, u4;
2527 int rc;
2528
2529 switch (bit) {
2530 case IEEE80211_RADIOTAP_FLAGS:
2531 rc = cpack_uint8(s, &u.u8);
2532 if (rc != 0)
2533 break;
2534 *flags = u.u8;
2535 break;
2536 case IEEE80211_RADIOTAP_RATE:
2537 rc = cpack_uint8(s, &u.u8);
2538 if (rc != 0)
2539 break;
2540
2541 /* Save state rate */
2542 state->rate = u.u8;
2543 break;
2544 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2545 case IEEE80211_RADIOTAP_DB_ANTNOISE:
2546 case IEEE80211_RADIOTAP_ANTENNA:
2547 rc = cpack_uint8(s, &u.u8);
2548 break;
2549 case IEEE80211_RADIOTAP_DBM_ANTSIGNAL:
2550 case IEEE80211_RADIOTAP_DBM_ANTNOISE:
2551 rc = cpack_int8(s, &u.i8);
2552 break;
2553 case IEEE80211_RADIOTAP_CHANNEL:
2554 rc = cpack_uint16(s, &u.u16);
2555 if (rc != 0)
2556 break;
2557 rc = cpack_uint16(s, &u2.u16);
2558 break;
2559 case IEEE80211_RADIOTAP_FHSS:
2560 case IEEE80211_RADIOTAP_LOCK_QUALITY:
2561 case IEEE80211_RADIOTAP_TX_ATTENUATION:
2562 case IEEE80211_RADIOTAP_RX_FLAGS:
2563 rc = cpack_uint16(s, &u.u16);
2564 break;
2565 case IEEE80211_RADIOTAP_DB_TX_ATTENUATION:
2566 rc = cpack_uint8(s, &u.u8);
2567 break;
2568 case IEEE80211_RADIOTAP_DBM_TX_POWER:
2569 rc = cpack_int8(s, &u.i8);
2570 break;
2571 case IEEE80211_RADIOTAP_TSFT:
2572 rc = cpack_uint64(s, &u.u64);
2573 break;
2574 case IEEE80211_RADIOTAP_XCHANNEL:
2575 rc = cpack_uint32(s, &u.u32);
2576 if (rc != 0)
2577 break;
2578 rc = cpack_uint16(s, &u2.u16);
2579 if (rc != 0)
2580 break;
2581 rc = cpack_uint8(s, &u3.u8);
2582 if (rc != 0)
2583 break;
2584 rc = cpack_uint8(s, &u4.u8);
2585 break;
2586 case IEEE80211_RADIOTAP_MCS:
2587 rc = cpack_uint8(s, &u.u8);
2588 if (rc != 0)
2589 break;
2590 rc = cpack_uint8(s, &u2.u8);
2591 if (rc != 0)
2592 break;
2593 rc = cpack_uint8(s, &u3.u8);
2594 break;
2595 case IEEE80211_RADIOTAP_VENDOR_NAMESPACE: {
2596 uint8_t vns[3];
2597 uint16_t length;
2598 uint8_t subspace;
2599
2600 if ((cpack_align_and_reserve(s, 2)) == NULL) {
2601 rc = -1;
2602 break;
2603 }
2604
2605 rc = cpack_uint8(s, &vns[0]);
2606 if (rc != 0)
2607 break;
2608 rc = cpack_uint8(s, &vns[1]);
2609 if (rc != 0)
2610 break;
2611 rc = cpack_uint8(s, &vns[2]);
2612 if (rc != 0)
2613 break;
2614 rc = cpack_uint8(s, &subspace);
2615 if (rc != 0)
2616 break;
2617 rc = cpack_uint16(s, &length);
2618 if (rc != 0)
2619 break;
2620
2621 /* Skip up to length */
2622 s->c_next += length;
2623 break;
2624 }
2625 default:
2626 /* this bit indicates a field whose
2627 * size we do not know, so we cannot
2628 * proceed. Just print the bit number.
2629 */
2630 ND_PRINT((ndo, "[bit %u] ", bit));
2631 return -1;
2632 }
2633
2634 if (rc != 0) {
2635 ND_PRINT((ndo, "%s", tstr));
2636 return rc;
2637 }
2638
2639 /* Preserve the state present flags */
2640 state->present = presentflags;
2641
2642 switch (bit) {
2643 case IEEE80211_RADIOTAP_CHANNEL:
2644 /*
2645 * If CHANNEL and XCHANNEL are both present, skip
2646 * CHANNEL.
2647 */
2648 if (presentflags & (1 << IEEE80211_RADIOTAP_XCHANNEL))
2649 break;
2650 print_chaninfo(ndo, u.u16, u2.u16);
2651 break;
2652 case IEEE80211_RADIOTAP_FHSS:
2653 ND_PRINT((ndo, "fhset %d fhpat %d ", u.u16 & 0xff, (u.u16 >> 8) & 0xff));
2654 break;
2655 case IEEE80211_RADIOTAP_RATE:
2656 /*
2657 * XXX On FreeBSD rate & 0x80 means we have an MCS. On
2658 * Linux and AirPcap it does not. (What about
2659 * Mac OS X, NetBSD, OpenBSD, and DragonFly BSD?)
2660 *
2661 * This is an issue either for proprietary extensions
2662 * to 11a or 11g, which do exist, or for 11n
2663 * implementations that stuff a rate value into
2664 * this field, which also appear to exist.
2665 *
2666 * We currently handle that by assuming that
2667 * if the 0x80 bit is set *and* the remaining
2668 * bits have a value between 0 and 15 it's
2669 * an MCS value, otherwise it's a rate. If
2670 * there are cases where systems that use
2671 * "0x80 + MCS index" for MCS indices > 15,
2672 * or stuff a rate value here between 64 and
2673 * 71.5 Mb/s in here, we'll need a preference
2674 * setting. Such rates do exist, e.g. 11n
2675 * MCS 7 at 20 MHz with a long guard interval.
2676 */
2677 if (u.u8 >= 0x80 && u.u8 <= 0x8f) {
2678 /*
2679 * XXX - we don't know the channel width
2680 * or guard interval length, so we can't
2681 * convert this to a data rate.
2682 *
2683 * If you want us to show a data rate,
2684 * use the MCS field, not the Rate field;
2685 * the MCS field includes not only the
2686 * MCS index, it also includes bandwidth
2687 * and guard interval information.
2688 *
2689 * XXX - can we get the channel width
2690 * from XChannel and the guard interval
2691 * information from Flags, at least on
2692 * FreeBSD?
2693 */
2694 ND_PRINT((ndo, "MCS %u ", u.u8 & 0x7f));
2695 } else
2696 ND_PRINT((ndo, "%2.1f Mb/s ", .5 * u.u8));
2697 break;
2698 case IEEE80211_RADIOTAP_DBM_ANTSIGNAL:
2699 ND_PRINT((ndo, "%ddBm signal ", u.i8));
2700 break;
2701 case IEEE80211_RADIOTAP_DBM_ANTNOISE:
2702 ND_PRINT((ndo, "%ddBm noise ", u.i8));
2703 break;
2704 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2705 ND_PRINT((ndo, "%ddB signal ", u.u8));
2706 break;
2707 case IEEE80211_RADIOTAP_DB_ANTNOISE:
2708 ND_PRINT((ndo, "%ddB noise ", u.u8));
2709 break;
2710 case IEEE80211_RADIOTAP_LOCK_QUALITY:
2711 ND_PRINT((ndo, "%u sq ", u.u16));
2712 break;
2713 case IEEE80211_RADIOTAP_TX_ATTENUATION:
2714 ND_PRINT((ndo, "%d tx power ", -(int)u.u16));
2715 break;
2716 case IEEE80211_RADIOTAP_DB_TX_ATTENUATION:
2717 ND_PRINT((ndo, "%ddB tx power ", -(int)u.u8));
2718 break;
2719 case IEEE80211_RADIOTAP_DBM_TX_POWER:
2720 ND_PRINT((ndo, "%ddBm tx power ", u.i8));
2721 break;
2722 case IEEE80211_RADIOTAP_FLAGS:
2723 if (u.u8 & IEEE80211_RADIOTAP_F_CFP)
2724 ND_PRINT((ndo, "cfp "));
2725 if (u.u8 & IEEE80211_RADIOTAP_F_SHORTPRE)
2726 ND_PRINT((ndo, "short preamble "));
2727 if (u.u8 & IEEE80211_RADIOTAP_F_WEP)
2728 ND_PRINT((ndo, "wep "));
2729 if (u.u8 & IEEE80211_RADIOTAP_F_FRAG)
2730 ND_PRINT((ndo, "fragmented "));
2731 if (u.u8 & IEEE80211_RADIOTAP_F_BADFCS)
2732 ND_PRINT((ndo, "bad-fcs "));
2733 break;
2734 case IEEE80211_RADIOTAP_ANTENNA:
2735 ND_PRINT((ndo, "antenna %d ", u.u8));
2736 break;
2737 case IEEE80211_RADIOTAP_TSFT:
2738 ND_PRINT((ndo, "%" PRIu64 "us tsft ", u.u64));
2739 break;
2740 case IEEE80211_RADIOTAP_RX_FLAGS:
2741 /* Do nothing for now */
2742 break;
2743 case IEEE80211_RADIOTAP_XCHANNEL:
2744 print_chaninfo(ndo, u2.u16, u.u32);
2745 break;
2746 case IEEE80211_RADIOTAP_MCS: {
2747 static const char *bandwidth[4] = {
2748 "20 MHz",
2749 "40 MHz",
2750 "20 MHz (L)",
2751 "20 MHz (U)"
2752 };
2753 float htrate;
2754
2755 if (u.u8 & IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN) {
2756 /*
2757 * We know the MCS index.
2758 */
2759 if (u3.u8 <= MAX_MCS_INDEX) {
2760 /*
2761 * And it's in-range.
2762 */
2763 if (u.u8 & (IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN|IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN)) {
2764 /*
2765 * And we know both the bandwidth and
2766 * the guard interval, so we can look
2767 * up the rate.
2768 */
2769 htrate =
2770 ieee80211_float_htrates \
2771 [u3.u8] \
2772 [((u2.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK) == IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 ? 1 : 0)] \
2773 [((u2.u8 & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? 1 : 0)];
2774 } else {
2775 /*
2776 * We don't know both the bandwidth
2777 * and the guard interval, so we can
2778 * only report the MCS index.
2779 */
2780 htrate = 0.0;
2781 }
2782 } else {
2783 /*
2784 * The MCS value is out of range.
2785 */
2786 htrate = 0.0;
2787 }
2788 if (htrate != 0.0) {
2789 /*
2790 * We have the rate.
2791 * Print it.
2792 */
2793 ND_PRINT((ndo, "%.1f Mb/s MCS %u ", htrate, u3.u8));
2794 } else {
2795 /*
2796 * We at least have the MCS index.
2797 * Print it.
2798 */
2799 ND_PRINT((ndo, "MCS %u ", u3.u8));
2800 }
2801 }
2802 if (u.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN) {
2803 ND_PRINT((ndo, "%s ",
2804 bandwidth[u2.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK]));
2805 }
2806 if (u.u8 & IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN) {
2807 ND_PRINT((ndo, "%s GI ",
2808 (u2.u8 & IEEE80211_RADIOTAP_MCS_SHORT_GI) ?
2809 "short" : "lon"));
2810 }
2811 if (u.u8 & IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN) {
2812 ND_PRINT((ndo, "%s ",
2813 (u2.u8 & IEEE80211_RADIOTAP_MCS_HT_GREENFIELD) ?
2814 "greenfield" : "mixed"));
2815 }
2816 if (u.u8 & IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN) {
2817 ND_PRINT((ndo, "%s FEC ",
2818 (u2.u8 & IEEE80211_RADIOTAP_MCS_FEC_LDPC) ?
2819 "LDPC" : "BCC"));
2820 }
2821 if (u.u8 & IEEE80211_RADIOTAP_MCS_STBC_KNOWN) {
2822 ND_PRINT((ndo, "RX-STBC%u ",
2823 (u2.u8 & IEEE80211_RADIOTAP_MCS_STBC_MASK) >> IEEE80211_RADIOTAP_MCS_STBC_SHIFT));
2824 }
2825
2826 break;
2827 }
2828 }
2829 return 0;
2830 }
2831
2832 static u_int
2833 ieee802_11_radio_print(netdissect_options *ndo,
2834 const u_char *p, u_int length, u_int caplen)
2835 {
2836 #define BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x)))
2837 #define BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x)))
2838 #define BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x)))
2839 #define BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x)))
2840 #define BITNO_2(x) (((x) & 2) ? 1 : 0)
2841 #define BIT(n) (1U << n)
2842 #define IS_EXTENDED(__p) \
2843 (EXTRACT_LE_32BITS(__p) & BIT(IEEE80211_RADIOTAP_EXT)) != 0
2844
2845 struct cpack_state cpacker;
2846 const struct ieee80211_radiotap_header *hdr;
2847 uint32_t present, next_present;
2848 uint32_t presentflags = 0;
2849 const uint32_t *presentp, *last_presentp;
2850 enum ieee80211_radiotap_type bit;
2851 int bit0;
2852 u_int len;
2853 uint8_t flags;
2854 int pad;
2855 u_int fcslen;
2856 struct radiotap_state state;
2857
2858 if (caplen < sizeof(*hdr)) {
2859 ND_PRINT((ndo, "%s", tstr));
2860 return caplen;
2861 }
2862
2863 hdr = (const struct ieee80211_radiotap_header *)p;
2864
2865 len = EXTRACT_LE_16BITS(&hdr->it_len);
2866
2867 if (caplen < len) {
2868 ND_PRINT((ndo, "%s", tstr));
2869 return caplen;
2870 }
2871 cpack_init(&cpacker, (const uint8_t *)hdr, len); /* align against header start */
2872 cpack_advance(&cpacker, sizeof(*hdr)); /* includes the 1st bitmap */
2873 for (last_presentp = &hdr->it_present;
2874 IS_EXTENDED(last_presentp) &&
2875 (const u_char*)(last_presentp + 1) <= p + len;
2876 last_presentp++)
2877 cpack_advance(&cpacker, sizeof(hdr->it_present)); /* more bitmaps */
2878
2879 /* are there more bitmap extensions than bytes in header? */
2880 if (IS_EXTENDED(last_presentp)) {
2881 ND_PRINT((ndo, "%s", tstr));
2882 return caplen;
2883 }
2884
2885 /* Assume no flags */
2886 flags = 0;
2887 /* Assume no Atheros padding between 802.11 header and body */
2888 pad = 0;
2889 /* Assume no FCS at end of frame */
2890 fcslen = 0;
2891 for (bit0 = 0, presentp = &hdr->it_present; presentp <= last_presentp;
2892 presentp++, bit0 += 32) {
2893 presentflags = EXTRACT_LE_32BITS(presentp);
2894
2895 /* Clear state. */
2896 memset(&state, 0, sizeof(state));
2897
2898 for (present = EXTRACT_LE_32BITS(presentp); present;
2899 present = next_present) {
2900 /* clear the least significant bit that is set */
2901 next_present = present & (present - 1);
2902
2903 /* extract the least significant bit that is set */
2904 bit = (enum ieee80211_radiotap_type)
2905 (bit0 + BITNO_32(present ^ next_present));
2906
2907 if (print_radiotap_field(ndo, &cpacker, bit, &flags, &state, presentflags) != 0)
2908 goto out;
2909 }
2910 }
2911
2912 out:
2913 if (flags & IEEE80211_RADIOTAP_F_DATAPAD)
2914 pad = 1; /* Atheros padding */
2915 if (flags & IEEE80211_RADIOTAP_F_FCS)
2916 fcslen = 4; /* FCS at end of packet */
2917 return len + ieee802_11_print(ndo, p + len, length - len, caplen - len, pad,
2918 fcslen);
2919 #undef BITNO_32
2920 #undef BITNO_16
2921 #undef BITNO_8
2922 #undef BITNO_4
2923 #undef BITNO_2
2924 #undef BIT
2925 }
2926
2927 static u_int
2928 ieee802_11_avs_radio_print(netdissect_options *ndo,
2929 const u_char *p, u_int length, u_int caplen)
2930 {
2931 uint32_t caphdr_len;
2932
2933 if (caplen < 8) {
2934 ND_PRINT((ndo, "%s", tstr));
2935 return caplen;
2936 }
2937
2938 caphdr_len = EXTRACT_32BITS(p + 4);
2939 if (caphdr_len < 8) {
2940 /*
2941 * Yow! The capture header length is claimed not
2942 * to be large enough to include even the version
2943 * cookie or capture header length!
2944 */
2945 ND_PRINT((ndo, "%s", tstr));
2946 return caplen;
2947 }
2948
2949 if (caplen < caphdr_len) {
2950 ND_PRINT((ndo, "%s", tstr));
2951 return caplen;
2952 }
2953
2954 return caphdr_len + ieee802_11_print(ndo, p + caphdr_len,
2955 length - caphdr_len, caplen - caphdr_len, 0, 0);
2956 }
2957
2958 #define PRISM_HDR_LEN 144
2959
2960 #define WLANCAP_MAGIC_COOKIE_BASE 0x80211000
2961 #define WLANCAP_MAGIC_COOKIE_V1 0x80211001
2962 #define WLANCAP_MAGIC_COOKIE_V2 0x80211002
2963
2964 /*
2965 * For DLT_PRISM_HEADER; like DLT_IEEE802_11, but with an extra header,
2966 * containing information such as radio information, which we
2967 * currently ignore.
2968 *
2969 * If, however, the packet begins with WLANCAP_MAGIC_COOKIE_V1 or
2970 * WLANCAP_MAGIC_COOKIE_V2, it's really DLT_IEEE802_11_RADIO_AVS
2971 * (currently, on Linux, there's no ARPHRD_ type for
2972 * DLT_IEEE802_11_RADIO_AVS, as there is a ARPHRD_IEEE80211_PRISM
2973 * for DLT_PRISM_HEADER, so ARPHRD_IEEE80211_PRISM is used for
2974 * the AVS header, and the first 4 bytes of the header are used to
2975 * indicate whether it's a Prism header or an AVS header).
2976 */
2977 u_int
2978 prism_if_print(netdissect_options *ndo,
2979 const struct pcap_pkthdr *h, const u_char *p)
2980 {
2981 u_int caplen = h->caplen;
2982 u_int length = h->len;
2983 uint32_t msgcode;
2984
2985 if (caplen < 4) {
2986 ND_PRINT((ndo, "%s", tstr));
2987 return caplen;
2988 }
2989
2990 msgcode = EXTRACT_32BITS(p);
2991 if (msgcode == WLANCAP_MAGIC_COOKIE_V1 ||
2992 msgcode == WLANCAP_MAGIC_COOKIE_V2)
2993 return ieee802_11_avs_radio_print(ndo, p, length, caplen);
2994
2995 if (caplen < PRISM_HDR_LEN) {
2996 ND_PRINT((ndo, "%s", tstr));
2997 return caplen;
2998 }
2999
3000 return PRISM_HDR_LEN + ieee802_11_print(ndo, p + PRISM_HDR_LEN,
3001 length - PRISM_HDR_LEN, caplen - PRISM_HDR_LEN, 0, 0);
3002 }
3003
3004 /*
3005 * For DLT_IEEE802_11_RADIO; like DLT_IEEE802_11, but with an extra
3006 * header, containing information such as radio information.
3007 */
3008 u_int
3009 ieee802_11_radio_if_print(netdissect_options *ndo,
3010 const struct pcap_pkthdr *h, const u_char *p)
3011 {
3012 return ieee802_11_radio_print(ndo, p, h->len, h->caplen);
3013 }
3014
3015 /*
3016 * For DLT_IEEE802_11_RADIO_AVS; like DLT_IEEE802_11, but with an
3017 * extra header, containing information such as radio information,
3018 * which we currently ignore.
3019 */
3020 u_int
3021 ieee802_11_radio_avs_if_print(netdissect_options *ndo,
3022 const struct pcap_pkthdr *h, const u_char *p)
3023 {
3024 return ieee802_11_avs_radio_print(ndo, p, h->len, h->caplen);
3025 }
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