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kobject: Cleanup kobject_rename and !CONFIG_SYSFS
[linux-block.git] / include / linux / ieee80211.h
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a9de8ce0
JB		 1/*
2 * IEEE 802.11 defines
3 *
4 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
5 * <jkmaline@cc.hut.fi>
6 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
7 * Copyright (c) 2005, Devicescape Software, Inc.
8 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#ifndef IEEE80211_H
16#define IEEE80211_H
17
18#include <linux/types.h>
f97df02e 19#include <asm/byteorder.h>
a9de8ce0
JB		 20
21#define FCS_LEN 4
22
23#define IEEE80211_FCTL_VERS 0x0003
24#define IEEE80211_FCTL_FTYPE 0x000c
25#define IEEE80211_FCTL_STYPE 0x00f0
26#define IEEE80211_FCTL_TODS 0x0100
27#define IEEE80211_FCTL_FROMDS 0x0200
28#define IEEE80211_FCTL_MOREFRAGS 0x0400
29#define IEEE80211_FCTL_RETRY 0x0800
30#define IEEE80211_FCTL_PM 0x1000
31#define IEEE80211_FCTL_MOREDATA 0x2000
32#define IEEE80211_FCTL_PROTECTED 0x4000
33#define IEEE80211_FCTL_ORDER 0x8000
34
35#define IEEE80211_SCTL_FRAG 0x000F
36#define IEEE80211_SCTL_SEQ 0xFFF0
37
38#define IEEE80211_FTYPE_MGMT 0x0000
39#define IEEE80211_FTYPE_CTL 0x0004
40#define IEEE80211_FTYPE_DATA 0x0008
41
42/* management */
43#define IEEE80211_STYPE_ASSOC_REQ 0x0000
44#define IEEE80211_STYPE_ASSOC_RESP 0x0010
45#define IEEE80211_STYPE_REASSOC_REQ 0x0020
46#define IEEE80211_STYPE_REASSOC_RESP 0x0030
47#define IEEE80211_STYPE_PROBE_REQ 0x0040
48#define IEEE80211_STYPE_PROBE_RESP 0x0050
49#define IEEE80211_STYPE_BEACON 0x0080
50#define IEEE80211_STYPE_ATIM 0x0090
51#define IEEE80211_STYPE_DISASSOC 0x00A0
52#define IEEE80211_STYPE_AUTH 0x00B0
53#define IEEE80211_STYPE_DEAUTH 0x00C0
54#define IEEE80211_STYPE_ACTION 0x00D0
55
56/* control */
6b4e3241
RR		 57#define IEEE80211_STYPE_BACK_REQ 0x0080
58#define IEEE80211_STYPE_BACK 0x0090
a9de8ce0
JB		 59#define IEEE80211_STYPE_PSPOLL 0x00A0
60#define IEEE80211_STYPE_RTS 0x00B0
61#define IEEE80211_STYPE_CTS 0x00C0
62#define IEEE80211_STYPE_ACK 0x00D0
63#define IEEE80211_STYPE_CFEND 0x00E0
64#define IEEE80211_STYPE_CFENDACK 0x00F0
65
66/* data */
67#define IEEE80211_STYPE_DATA 0x0000
68#define IEEE80211_STYPE_DATA_CFACK 0x0010
69#define IEEE80211_STYPE_DATA_CFPOLL 0x0020
70#define IEEE80211_STYPE_DATA_CFACKPOLL 0x0030
71#define IEEE80211_STYPE_NULLFUNC 0x0040
72#define IEEE80211_STYPE_CFACK 0x0050
73#define IEEE80211_STYPE_CFPOLL 0x0060
74#define IEEE80211_STYPE_CFACKPOLL 0x0070
75#define IEEE80211_STYPE_QOS_DATA 0x0080
76#define IEEE80211_STYPE_QOS_DATA_CFACK 0x0090
77#define IEEE80211_STYPE_QOS_DATA_CFPOLL 0x00A0
78#define IEEE80211_STYPE_QOS_DATA_CFACKPOLL 0x00B0
79#define IEEE80211_STYPE_QOS_NULLFUNC 0x00C0
80#define IEEE80211_STYPE_QOS_CFACK 0x00D0
81#define IEEE80211_STYPE_QOS_CFPOLL 0x00E0
82#define IEEE80211_STYPE_QOS_CFACKPOLL 0x00F0
83
84
85/* miscellaneous IEEE 802.11 constants */
c237899d
MW		 86#define IEEE80211_MAX_FRAG_THRESHOLD 2352
87#define IEEE80211_MAX_RTS_THRESHOLD 2353
a9de8ce0
JB		 88#define IEEE80211_MAX_AID 2007
89#define IEEE80211_MAX_TIM_LEN 251
a9de8ce0
JB		 90/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
91 6.2.1.1.2.
92
c237899d
MW		 93 802.11e clarifies the figure in section 7.1.2. The frame body is
94 up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
95#define IEEE80211_MAX_DATA_LEN 2304
96/* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
97#define IEEE80211_MAX_FRAME_LEN 2352
a9de8ce0
JB		 98
99#define IEEE80211_MAX_SSID_LEN 32
37c57989 100#define IEEE80211_MAX_MESH_ID_LEN 32
fd7c8a40 101#define IEEE80211_QOS_CTL_LEN 2
238f74a2
HH		 102#define IEEE80211_QOS_CTL_TID_MASK 0x000F
103#define IEEE80211_QOS_CTL_TAG1D_MASK 0x0007
a9de8ce0
JB		 104
105struct ieee80211_hdr {
106 __le16 frame_control;
107 __le16 duration_id;
108 u8 addr1[6];
109 u8 addr2[6];
110 u8 addr3[6];
111 __le16 seq_ctrl;
112 u8 addr4[6];
113} __attribute__ ((packed));
114
fd7c8a40
HH		 115/**
116 * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
117 * @fc: frame control bytes in little-endian byteorder
118 */
119static inline int ieee80211_has_tods(__le16 fc)
120{
121 return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
122}
123
124/**
125 * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
126 * @fc: frame control bytes in little-endian byteorder
127 */
128static inline int ieee80211_has_fromds(__le16 fc)
129{
130 return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
131}
132
133/**
134 * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
135 * @fc: frame control bytes in little-endian byteorder
136 */
137static inline int ieee80211_has_a4(__le16 fc)
138{
139 __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
140 return (fc & tmp) == tmp;
141}
142
143/**
144 * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
145 * @fc: frame control bytes in little-endian byteorder
146 */
147static inline int ieee80211_has_morefrags(__le16 fc)
148{
149 return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
150}
151
152/**
153 * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
154 * @fc: frame control bytes in little-endian byteorder
155 */
156static inline int ieee80211_has_retry(__le16 fc)
157{
158 return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
159}
160
161/**
162 * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
163 * @fc: frame control bytes in little-endian byteorder
164 */
165static inline int ieee80211_has_pm(__le16 fc)
166{
167 return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
168}
169
170/**
171 * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
172 * @fc: frame control bytes in little-endian byteorder
173 */
174static inline int ieee80211_has_moredata(__le16 fc)
175{
176 return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
177}
178
179/**
180 * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
181 * @fc: frame control bytes in little-endian byteorder
182 */
183static inline int ieee80211_has_protected(__le16 fc)
184{
185 return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
186}
187
188/**
189 * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
190 * @fc: frame control bytes in little-endian byteorder
191 */
192static inline int ieee80211_has_order(__le16 fc)
193{
194 return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
195}
196
197/**
198 * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
199 * @fc: frame control bytes in little-endian byteorder
200 */
201static inline int ieee80211_is_mgmt(__le16 fc)
202{
203 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
204 cpu_to_le16(IEEE80211_FTYPE_MGMT);
205}
206
207/**
208 * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
209 * @fc: frame control bytes in little-endian byteorder
210 */
211static inline int ieee80211_is_ctl(__le16 fc)
212{
213 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
214 cpu_to_le16(IEEE80211_FTYPE_CTL);
215}
216
217/**
218 * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
219 * @fc: frame control bytes in little-endian byteorder
220 */
221static inline int ieee80211_is_data(__le16 fc)
222{
223 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
224 cpu_to_le16(IEEE80211_FTYPE_DATA);
225}
226
227/**
228 * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
229 * @fc: frame control bytes in little-endian byteorder
230 */
231static inline int ieee80211_is_data_qos(__le16 fc)
232{
233 /*
234 * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
235 * to check the one bit
236 */
237 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
238 cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
239}
240
241/**
242 * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
243 * @fc: frame control bytes in little-endian byteorder
244 */
245static inline int ieee80211_is_data_present(__le16 fc)
246{
247 /*
248 * mask with 0x40 and test that that bit is clear to only return true
249 * for the data-containing substypes.
250 */
251 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
252 cpu_to_le16(IEEE80211_FTYPE_DATA);
253}
254
255/**
256 * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
257 * @fc: frame control bytes in little-endian byteorder
258 */
259static inline int ieee80211_is_assoc_req(__le16 fc)
260{
261 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
262 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
263}
264
265/**
266 * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
267 * @fc: frame control bytes in little-endian byteorder
268 */
269static inline int ieee80211_is_assoc_resp(__le16 fc)
270{
271 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
272 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
273}
274
275/**
276 * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
277 * @fc: frame control bytes in little-endian byteorder
278 */
279static inline int ieee80211_is_reassoc_req(__le16 fc)
280{
281 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
282 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
283}
284
285/**
286 * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
287 * @fc: frame control bytes in little-endian byteorder
288 */
289static inline int ieee80211_is_reassoc_resp(__le16 fc)
290{
291 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
292 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
293}
294
295/**
296 * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
297 * @fc: frame control bytes in little-endian byteorder
298 */
299static inline int ieee80211_is_probe_req(__le16 fc)
300{
301 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
302 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
303}
304
305/**
306 * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
307 * @fc: frame control bytes in little-endian byteorder
308 */
309static inline int ieee80211_is_probe_resp(__le16 fc)
310{
311 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
312 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
313}
314
315/**
316 * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
317 * @fc: frame control bytes in little-endian byteorder
318 */
319static inline int ieee80211_is_beacon(__le16 fc)
320{
321 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
322 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
323}
324
325/**
326 * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
327 * @fc: frame control bytes in little-endian byteorder
328 */
329static inline int ieee80211_is_atim(__le16 fc)
330{
331 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
332 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
333}
334
335/**
336 * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
337 * @fc: frame control bytes in little-endian byteorder
338 */
339static inline int ieee80211_is_disassoc(__le16 fc)
340{
341 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
342 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
343}
344
345/**
346 * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
347 * @fc: frame control bytes in little-endian byteorder
348 */
349static inline int ieee80211_is_auth(__le16 fc)
350{
351 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
352 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
353}
354
355/**
356 * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
357 * @fc: frame control bytes in little-endian byteorder
358 */
359static inline int ieee80211_is_deauth(__le16 fc)
360{
361 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
362 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
363}
364
365/**
366 * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
367 * @fc: frame control bytes in little-endian byteorder
368 */
369static inline int ieee80211_is_action(__le16 fc)
370{
371 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
372 cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
373}
374
375/**
376 * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
377 * @fc: frame control bytes in little-endian byteorder
378 */
379static inline int ieee80211_is_back_req(__le16 fc)
380{
381 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
382 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
383}
384
385/**
386 * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
387 * @fc: frame control bytes in little-endian byteorder
388 */
389static inline int ieee80211_is_back(__le16 fc)
390{
391 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
392 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
393}
394
395/**
396 * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
397 * @fc: frame control bytes in little-endian byteorder
398 */
399static inline int ieee80211_is_pspoll(__le16 fc)
400{
401 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
402 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
403}
404
405/**
406 * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
407 * @fc: frame control bytes in little-endian byteorder
408 */
409static inline int ieee80211_is_rts(__le16 fc)
410{
411 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
412 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
413}
414
415/**
416 * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
417 * @fc: frame control bytes in little-endian byteorder
418 */
419static inline int ieee80211_is_cts(__le16 fc)
420{
421 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
422 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
423}
424
425/**
426 * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
427 * @fc: frame control bytes in little-endian byteorder
428 */
429static inline int ieee80211_is_ack(__le16 fc)
430{
431 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
432 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
433}
434
435/**
436 * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
437 * @fc: frame control bytes in little-endian byteorder
438 */
439static inline int ieee80211_is_cfend(__le16 fc)
440{
441 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
442 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
443}
444
445/**
446 * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
447 * @fc: frame control bytes in little-endian byteorder
448 */
449static inline int ieee80211_is_cfendack(__le16 fc)
450{
451 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
452 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
453}
454
455/**
456 * ieee80211_is_nullfunc - check if FTYPE=IEEE80211_FTYPE_DATA and STYPE=IEEE80211_STYPE_NULLFUNC
457 * @fc: frame control bytes in little-endian byteorder
458 */
459static inline int ieee80211_is_nullfunc(__le16 fc)
460{
461 return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
462 cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
463}
a9de8ce0 464
37c57989
LCC		 465struct ieee80211s_hdr {
466 u8 flags;
467 u8 ttl;
51ceddad 468 __le32 seqnum;
37c57989
LCC		 469 u8 eaddr1[6];
470 u8 eaddr2[6];
471 u8 eaddr3[6];
472} __attribute__ ((packed));
473
79617dee
Y		 474/* Mesh flags */
475#define MESH_FLAGS_AE_A4 0x1
476#define MESH_FLAGS_AE_A5_A6 0x2
477#define MESH_FLAGS_PS_DEEP 0x4
478
f2df3859
AK		 479/**
480 * struct ieee80211_quiet_ie
481 *
482 * This structure refers to "Quiet information element"
483 */
484struct ieee80211_quiet_ie {
485 u8 count;
486 u8 period;
487 __le16 duration;
488 __le16 offset;
489} __attribute__ ((packed));
490
491/**
492 * struct ieee80211_msrment_ie
493 *
494 * This structure refers to "Measurement Request/Report information element"
495 */
496struct ieee80211_msrment_ie {
497 u8 token;
498 u8 mode;
499 u8 type;
500 u8 request[0];
501} __attribute__ ((packed));
502
503/**
504 * struct ieee80211_channel_sw_ie
505 *
506 * This structure refers to "Channel Switch Announcement information element"
507 */
508struct ieee80211_channel_sw_ie {
509 u8 mode;
510 u8 new_ch_num;
511 u8 count;
512} __attribute__ ((packed));
37c57989 513
98f7dfd8
EG		 514/**
515 * struct ieee80211_tim
516 *
517 * This structure refers to "Traffic Indication Map information element"
518 */
519struct ieee80211_tim_ie {
520 u8 dtim_count;
521 u8 dtim_period;
522 u8 bitmap_ctrl;
523 /* variable size: 1 - 251 bytes */
524 u8 virtual_map[0];
525} __attribute__ ((packed));
526
a9de8ce0
JB		 527struct ieee80211_mgmt {
528 __le16 frame_control;
529 __le16 duration;
530 u8 da[6];
531 u8 sa[6];
532 u8 bssid[6];
533 __le16 seq_ctrl;
534 union {
535 struct {
536 __le16 auth_alg;
537 __le16 auth_transaction;
538 __le16 status_code;
539 /* possibly followed by Challenge text */
540 u8 variable[0];
541 } __attribute__ ((packed)) auth;
542 struct {
543 __le16 reason_code;
544 } __attribute__ ((packed)) deauth;
545 struct {
546 __le16 capab_info;
547 __le16 listen_interval;
548 /* followed by SSID and Supported rates */
549 u8 variable[0];
550 } __attribute__ ((packed)) assoc_req;
551 struct {
552 __le16 capab_info;
553 __le16 status_code;
554 __le16 aid;
555 /* followed by Supported rates */
556 u8 variable[0];
557 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
558 struct {
559 __le16 capab_info;
560 __le16 listen_interval;
561 u8 current_ap[6];
562 /* followed by SSID and Supported rates */
563 u8 variable[0];
564 } __attribute__ ((packed)) reassoc_req;
565 struct {
566 __le16 reason_code;
567 } __attribute__ ((packed)) disassoc;
568 struct {
569 __le64 timestamp;
570 __le16 beacon_int;
571 __le16 capab_info;
572 /* followed by some of SSID, Supported rates,
573 * FH Params, DS Params, CF Params, IBSS Params, TIM */
574 u8 variable[0];
575 } __attribute__ ((packed)) beacon;
576 struct {
577 /* only variable items: SSID, Supported rates */
578 u8 variable[0];
579 } __attribute__ ((packed)) probe_req;
580 struct {
581 __le64 timestamp;
582 __le16 beacon_int;
583 __le16 capab_info;
584 /* followed by some of SSID, Supported rates,
585 * FH Params, DS Params, CF Params, IBSS Params */
586 u8 variable[0];
587 } __attribute__ ((packed)) probe_resp;
588 struct {
589 u8 category;
590 union {
591 struct {
592 u8 action_code;
593 u8 dialog_token;
594 u8 status_code;
595 u8 variable[0];
596 } __attribute__ ((packed)) wme_action;
597 struct{
598 u8 action_code;
599 u8 element_id;
600 u8 length;
f2df3859 601 struct ieee80211_channel_sw_ie sw_elem;
a9de8ce0 602 } __attribute__((packed)) chan_switch;
f2df3859
AK		 603 struct{
604 u8 action_code;
605 u8 dialog_token;
606 u8 element_id;
607 u8 length;
608 struct ieee80211_msrment_ie msr_elem;
609 } __attribute__((packed)) measurement;
6b4e3241
RR		 610 struct{
611 u8 action_code;
612 u8 dialog_token;
613 __le16 capab;
614 __le16 timeout;
615 __le16 start_seq_num;
616 } __attribute__((packed)) addba_req;
617 struct{
618 u8 action_code;
619 u8 dialog_token;
620 __le16 status;
621 __le16 capab;
622 __le16 timeout;
623 } __attribute__((packed)) addba_resp;
624 struct{
625 u8 action_code;
626 __le16 params;
627 __le16 reason_code;
628 } __attribute__((packed)) delba;
37c57989
LCC		 629 struct{
630 u8 action_code;
631 /* capab_info for open and confirm,
632 * reason for close
633 */
634 __le16 aux;
635 /* Followed in plink_confirm by status
636 * code, AID and supported rates,
637 * and directly by supported rates in
638 * plink_open and plink_close
639 */
640 u8 variable[0];
641 } __attribute__((packed)) plink_action;
642 struct{
643 u8 action_code;
644 u8 variable[0];
645 } __attribute__((packed)) mesh_action;
a9de8ce0
JB		 646 } u;
647 } __attribute__ ((packed)) action;
648 } u;
649} __attribute__ ((packed));
650
44d414db
JB		 651/* mgmt header + 1 byte category code */
652#define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
653
a9de8ce0
JB		 654
655/* Control frames */
656struct ieee80211_rts {
657 __le16 frame_control;
658 __le16 duration;
659 u8 ra[6];
660 u8 ta[6];
661} __attribute__ ((packed));
662
663struct ieee80211_cts {
664 __le16 frame_control;
665 __le16 duration;
666 u8 ra[6];
667} __attribute__ ((packed));
668
6b4e3241
RR		 669/**
670 * struct ieee80211_bar - HT Block Ack Request
671 *
672 * This structure refers to "HT BlockAckReq" as
673 * described in 802.11n draft section 7.2.1.7.1
674 */
675struct ieee80211_bar {
676 __le16 frame_control;
677 __le16 duration;
678 __u8 ra[6];
679 __u8 ta[6];
a8b47ea3
RR		 680 __le16 control;
681 __le16 start_seq_num;
6b4e3241
RR		 682} __attribute__((packed));
683
429a3805
RR		 684/* 802.11 BAR control masks */
685#define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL 0x0000
686#define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA 0x0004
687
6b4e3241
RR		 688/**
689 * struct ieee80211_ht_cap - HT capabilities
690 *
691 * This structure refers to "HT capabilities element" as
692 * described in 802.11n draft section 7.3.2.52
693 */
694struct ieee80211_ht_cap {
695 __le16 cap_info;
696 u8 ampdu_params_info;
697 u8 supp_mcs_set[16];
698 __le16 extended_ht_cap_info;
699 __le32 tx_BF_cap_info;
700 u8 antenna_selection_info;
701} __attribute__ ((packed));
702
703/**
704 * struct ieee80211_ht_cap - HT additional information
705 *
706 * This structure refers to "HT information element" as
707 * described in 802.11n draft section 7.3.2.53
708 */
709struct ieee80211_ht_addt_info {
710 u8 control_chan;
711 u8 ht_param;
712 __le16 operation_mode;
713 __le16 stbc_param;
714 u8 basic_set[16];
715} __attribute__ ((packed));
716
717/* 802.11n HT capabilities masks */
718#define IEEE80211_HT_CAP_SUP_WIDTH 0x0002
00c5ae2f 719#define IEEE80211_HT_CAP_SM_PS 0x000C
6b4e3241
RR		 720#define IEEE80211_HT_CAP_GRN_FLD 0x0010
721#define IEEE80211_HT_CAP_SGI_20 0x0020
722#define IEEE80211_HT_CAP_SGI_40 0x0040
723#define IEEE80211_HT_CAP_DELAY_BA 0x0400
724#define IEEE80211_HT_CAP_MAX_AMSDU 0x0800
18d7c65b 725#define IEEE80211_HT_CAP_DSSSCCK40 0x1000
edcdf8b2 726/* 802.11n HT capability AMPDU settings */
6b4e3241
RR		 727#define IEEE80211_HT_CAP_AMPDU_FACTOR 0x03
728#define IEEE80211_HT_CAP_AMPDU_DENSITY 0x1C
edcdf8b2
RR		 729/* 802.11n HT capability MSC set */
730#define IEEE80211_SUPP_MCS_SET_UEQM 4
731#define IEEE80211_HT_CAP_MAX_STREAMS 4
732#define IEEE80211_SUPP_MCS_SET_LEN 10
733/* maximum streams the spec allows */
734#define IEEE80211_HT_CAP_MCS_TX_DEFINED 0x01
735#define IEEE80211_HT_CAP_MCS_TX_RX_DIFF 0x02
736#define IEEE80211_HT_CAP_MCS_TX_STREAMS 0x0C
737#define IEEE80211_HT_CAP_MCS_TX_UEQM 0x10
6b4e3241
RR		 738/* 802.11n HT IE masks */
739#define IEEE80211_HT_IE_CHA_SEC_OFFSET 0x03
963f5517 740#define IEEE80211_HT_IE_CHA_SEC_NONE 0x00
9306102e
EG		 741#define IEEE80211_HT_IE_CHA_SEC_ABOVE 0x01
742#define IEEE80211_HT_IE_CHA_SEC_BELOW 0x03
6b4e3241
RR		 743#define IEEE80211_HT_IE_CHA_WIDTH 0x04
744#define IEEE80211_HT_IE_HT_PROTECTION 0x0003
745#define IEEE80211_HT_IE_NON_GF_STA_PRSNT 0x0004
746#define IEEE80211_HT_IE_NON_HT_STA_PRSNT 0x0010
a9de8ce0 747
44d414db
JB		 748/* block-ack parameters */
749#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
750#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
751#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
752#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
753#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
754
755/*
756 * A-PMDU buffer sizes
757 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
758 */
759#define IEEE80211_MIN_AMPDU_BUF 0x8
760#define IEEE80211_MAX_AMPDU_BUF 0x40
761
762
00c5ae2f
TW		 763/* Spatial Multiplexing Power Save Modes */
764#define WLAN_HT_CAP_SM_PS_STATIC 0
765#define WLAN_HT_CAP_SM_PS_DYNAMIC 1
766#define WLAN_HT_CAP_SM_PS_INVALID 2
767#define WLAN_HT_CAP_SM_PS_DISABLED 3
e53cfe0e 768
a9de8ce0
JB		 769/* Authentication algorithms */
770#define WLAN_AUTH_OPEN 0
771#define WLAN_AUTH_SHARED_KEY 1
772#define WLAN_AUTH_FAST_BSS_TRANSITION 2
773#define WLAN_AUTH_LEAP 128
774
775#define WLAN_AUTH_CHALLENGE_LEN 128
776
777#define WLAN_CAPABILITY_ESS (1<<0)
778#define WLAN_CAPABILITY_IBSS (1<<1)
779#define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
780#define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
781#define WLAN_CAPABILITY_PRIVACY (1<<4)
782#define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
783#define WLAN_CAPABILITY_PBCC (1<<6)
784#define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
b6623486 785
a9de8ce0
JB		 786/* 802.11h */
787#define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
788#define WLAN_CAPABILITY_QOS (1<<9)
789#define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
790#define WLAN_CAPABILITY_DSSS_OFDM (1<<13)
b6623486
AK		 791/* measurement */
792#define IEEE80211_SPCT_MSR_RPRT_MODE_LATE (1<<0)
793#define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE (1<<1)
794#define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED (1<<2)
795
796#define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC 0
797#define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA 1
798#define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI 2
799
a9de8ce0 800
5628221c
DD		 801/* 802.11g ERP information element */
802#define WLAN_ERP_NON_ERP_PRESENT (1<<0)
803#define WLAN_ERP_USE_PROTECTION (1<<1)
804#define WLAN_ERP_BARKER_PREAMBLE (1<<2)
805
806/* WLAN_ERP_BARKER_PREAMBLE values */
807enum {
808 WLAN_ERP_PREAMBLE_SHORT = 0,
809 WLAN_ERP_PREAMBLE_LONG = 1,
810};
811
a9de8ce0
JB		 812/* Status codes */
813enum ieee80211_statuscode {
814 WLAN_STATUS_SUCCESS = 0,
815 WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
816 WLAN_STATUS_CAPS_UNSUPPORTED = 10,
817 WLAN_STATUS_REASSOC_NO_ASSOC = 11,
818 WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
819 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
820 WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
821 WLAN_STATUS_CHALLENGE_FAIL = 15,
822 WLAN_STATUS_AUTH_TIMEOUT = 16,
823 WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
824 WLAN_STATUS_ASSOC_DENIED_RATES = 18,
825 /* 802.11b */
826 WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
827 WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
828 WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
829 /* 802.11h */
830 WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
831 WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
832 WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
833 /* 802.11g */
834 WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
835 WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
836 /* 802.11i */
837 WLAN_STATUS_INVALID_IE = 40,
838 WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
839 WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
840 WLAN_STATUS_INVALID_AKMP = 43,
841 WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
842 WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
843 WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
6b4e3241
RR		 844 /* 802.11e */
845 WLAN_STATUS_UNSPECIFIED_QOS = 32,
846 WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
847 WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
848 WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
849 WLAN_STATUS_REQUEST_DECLINED = 37,
850 WLAN_STATUS_INVALID_QOS_PARAM = 38,
851 WLAN_STATUS_CHANGE_TSPEC = 39,
852 WLAN_STATUS_WAIT_TS_DELAY = 47,
853 WLAN_STATUS_NO_DIRECT_LINK = 48,
854 WLAN_STATUS_STA_NOT_PRESENT = 49,
855 WLAN_STATUS_STA_NOT_QSTA = 50,
a9de8ce0
JB		 856};
857
858
859/* Reason codes */
860enum ieee80211_reasoncode {
861 WLAN_REASON_UNSPECIFIED = 1,
862 WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
863 WLAN_REASON_DEAUTH_LEAVING = 3,
864 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
865 WLAN_REASON_DISASSOC_AP_BUSY = 5,
866 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
867 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
868 WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
869 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
870 /* 802.11h */
871 WLAN_REASON_DISASSOC_BAD_POWER = 10,
872 WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
873 /* 802.11i */
874 WLAN_REASON_INVALID_IE = 13,
875 WLAN_REASON_MIC_FAILURE = 14,
876 WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
877 WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
878 WLAN_REASON_IE_DIFFERENT = 17,
879 WLAN_REASON_INVALID_GROUP_CIPHER = 18,
880 WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
881 WLAN_REASON_INVALID_AKMP = 20,
882 WLAN_REASON_UNSUPP_RSN_VERSION = 21,
883 WLAN_REASON_INVALID_RSN_IE_CAP = 22,
884 WLAN_REASON_IEEE8021X_FAILED = 23,
885 WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
6b4e3241
RR		 886 /* 802.11e */
887 WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
888 WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
889 WLAN_REASON_DISASSOC_LOW_ACK = 34,
890 WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
891 WLAN_REASON_QSTA_LEAVE_QBSS = 36,
892 WLAN_REASON_QSTA_NOT_USE = 37,
893 WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
894 WLAN_REASON_QSTA_TIMEOUT = 39,
895 WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
a9de8ce0
JB		 896};
897
898
899/* Information Element IDs */
900enum ieee80211_eid {
901 WLAN_EID_SSID = 0,
902 WLAN_EID_SUPP_RATES = 1,
903 WLAN_EID_FH_PARAMS = 2,
904 WLAN_EID_DS_PARAMS = 3,
905 WLAN_EID_CF_PARAMS = 4,
906 WLAN_EID_TIM = 5,
907 WLAN_EID_IBSS_PARAMS = 6,
908 WLAN_EID_CHALLENGE = 16,
909 /* 802.11d */
910 WLAN_EID_COUNTRY = 7,
911 WLAN_EID_HP_PARAMS = 8,
912 WLAN_EID_HP_TABLE = 9,
913 WLAN_EID_REQUEST = 10,
6b4e3241
RR		 914 /* 802.11e */
915 WLAN_EID_QBSS_LOAD = 11,
916 WLAN_EID_EDCA_PARAM_SET = 12,
917 WLAN_EID_TSPEC = 13,
918 WLAN_EID_TCLAS = 14,
919 WLAN_EID_SCHEDULE = 15,
920 WLAN_EID_TS_DELAY = 43,
921 WLAN_EID_TCLAS_PROCESSING = 44,
922 WLAN_EID_QOS_CAPA = 46,
d619ee08
LCC		 923 /* 802.11s
924 *
925 * All mesh EID numbers are pending IEEE 802.11 ANA approval.
926 * The numbers have been incremented from those suggested in
927 * 802.11s/D2.0 so that MESH_CONFIG does not conflict with
928 * EXT_SUPP_RATES.
929 */
930 WLAN_EID_MESH_CONFIG = 51,
931 WLAN_EID_MESH_ID = 52,
932 WLAN_EID_PEER_LINK = 55,
933 WLAN_EID_PREQ = 68,
934 WLAN_EID_PREP = 69,
935 WLAN_EID_PERR = 70,
a9de8ce0
JB		 936 /* 802.11h */
937 WLAN_EID_PWR_CONSTRAINT = 32,
938 WLAN_EID_PWR_CAPABILITY = 33,
939 WLAN_EID_TPC_REQUEST = 34,
940 WLAN_EID_TPC_REPORT = 35,
941 WLAN_EID_SUPPORTED_CHANNELS = 36,
942 WLAN_EID_CHANNEL_SWITCH = 37,
943 WLAN_EID_MEASURE_REQUEST = 38,
944 WLAN_EID_MEASURE_REPORT = 39,
945 WLAN_EID_QUIET = 40,
946 WLAN_EID_IBSS_DFS = 41,
947 /* 802.11g */
948 WLAN_EID_ERP_INFO = 42,
949 WLAN_EID_EXT_SUPP_RATES = 50,
6b4e3241
RR		 950 /* 802.11n */
951 WLAN_EID_HT_CAPABILITY = 45,
952 WLAN_EID_HT_EXTRA_INFO = 61,
a9de8ce0
JB		 953 /* 802.11i */
954 WLAN_EID_RSN = 48,
955 WLAN_EID_WPA = 221,
956 WLAN_EID_GENERIC = 221,
957 WLAN_EID_VENDOR_SPECIFIC = 221,
958 WLAN_EID_QOS_PARAMETER = 222
959};
960
6b4e3241
RR		 961/* Action category code */
962enum ieee80211_category {
963 WLAN_CATEGORY_SPECTRUM_MGMT = 0,
964 WLAN_CATEGORY_QOS = 1,
965 WLAN_CATEGORY_DLS = 2,
966 WLAN_CATEGORY_BACK = 3,
967 WLAN_CATEGORY_WMM = 17,
968};
969
f2df3859
AK		 970/* SPECTRUM_MGMT action code */
971enum ieee80211_spectrum_mgmt_actioncode {
972 WLAN_ACTION_SPCT_MSR_REQ = 0,
973 WLAN_ACTION_SPCT_MSR_RPRT = 1,
974 WLAN_ACTION_SPCT_TPC_REQ = 2,
975 WLAN_ACTION_SPCT_TPC_RPRT = 3,
976 WLAN_ACTION_SPCT_CHL_SWITCH = 4,
977};
978
6b4e3241
RR		 979/* BACK action code */
980enum ieee80211_back_actioncode {
981 WLAN_ACTION_ADDBA_REQ = 0,
982 WLAN_ACTION_ADDBA_RESP = 1,
983 WLAN_ACTION_DELBA = 2,
984};
985
07db2183
RR		 986/* BACK (block-ack) parties */
987enum ieee80211_back_parties {
988 WLAN_BACK_RECIPIENT = 0,
989 WLAN_BACK_INITIATOR = 1,
990 WLAN_BACK_TIMER = 2,
991};
992
6b4e3241
RR		 993/* A-MSDU 802.11n */
994#define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
995
a9de8ce0
JB		 996/* cipher suite selectors */
997#define WLAN_CIPHER_SUITE_USE_GROUP 0x000FAC00
998#define WLAN_CIPHER_SUITE_WEP40 0x000FAC01
999#define WLAN_CIPHER_SUITE_TKIP 0x000FAC02
1000/* reserved: 0x000FAC03 */
1001#define WLAN_CIPHER_SUITE_CCMP 0x000FAC04
1002#define WLAN_CIPHER_SUITE_WEP104 0x000FAC05
1003
1004#define WLAN_MAX_KEY_LEN 32
1005
fd7c8a40
HH		 1006/**
1007 * ieee80211_get_qos_ctl - get pointer to qos control bytes
1008 * @hdr: the frame
1009 *
1010 * The qos ctrl bytes come after the frame_control, duration, seq_num
1011 * and 3 or 4 addresses of length ETH_ALEN.
1012 * 3 addr: 2 + 2 + 2 + 3*6 = 24
1013 * 4 addr: 2 + 2 + 2 + 4*6 = 30
1014 */
1015static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
1016{
1017 if (ieee80211_has_a4(hdr->frame_control))
1018 return (u8 *)hdr + 30;
1019 else
1020 return (u8 *)hdr + 24;
1021}
1022
f97df02e
JB		 1023/**
1024 * ieee80211_get_SA - get pointer to SA
fd7c8a40 1025 * @hdr: the frame
f97df02e
JB		 1026 *
1027 * Given an 802.11 frame, this function returns the offset
1028 * to the source address (SA). It does not verify that the
1029 * header is long enough to contain the address, and the
1030 * header must be long enough to contain the frame control
1031 * field.
f97df02e
JB		 1032 */
1033static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
1034{
fd7c8a40 1035 if (ieee80211_has_a4(hdr->frame_control))
5a433b3a 1036 return hdr->addr4;
fd7c8a40
HH		 1037 if (ieee80211_has_fromds(hdr->frame_control))
1038 return hdr->addr3;
1039 return hdr->addr2;
f97df02e
JB		 1040}
1041
1042/**
1043 * ieee80211_get_DA - get pointer to DA
fd7c8a40 1044 * @hdr: the frame
f97df02e
JB		 1045 *
1046 * Given an 802.11 frame, this function returns the offset
1047 * to the destination address (DA). It does not verify that
1048 * the header is long enough to contain the address, and the
1049 * header must be long enough to contain the frame control
1050 * field.
f97df02e
JB		 1051 */
1052static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1053{
fd7c8a40 1054 if (ieee80211_has_tods(hdr->frame_control))
f97df02e 1055 return hdr->addr3;
5a433b3a
HH		 1056 else
1057 return hdr->addr1;
f97df02e
JB		 1058}
1059
a9de8ce0 1060#endif /* IEEE80211_H */
Linux 6.x block layer and io_uring tree(s)