Merge branch 'for-linus' of git://git.kernel.dk/linux-block
[linux-2.6.git] / include / linux / ieee80211.h
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 LINUX_IEEE80211_H
16 #define LINUX_IEEE80211_H
17
18 #include <linux/types.h>
19 #include <asm/byteorder.h>
20
21 /*
22  * DS bit usage
23  *
24  * TA = transmitter address
25  * RA = receiver address
26  * DA = destination address
27  * SA = source address
28  *
29  * ToDS    FromDS  A1(RA)  A2(TA)  A3      A4      Use
30  * -----------------------------------------------------------------
31  *  0       0       DA      SA      BSSID   -       IBSS/DLS
32  *  0       1       DA      BSSID   SA      -       AP -> STA
33  *  1       0       BSSID   SA      DA      -       AP <- STA
34  *  1       1       RA      TA      DA      SA      unspecified (WDS)
35  */
36
37 #define FCS_LEN 4
38
39 #define IEEE80211_FCTL_VERS             0x0003
40 #define IEEE80211_FCTL_FTYPE            0x000c
41 #define IEEE80211_FCTL_STYPE            0x00f0
42 #define IEEE80211_FCTL_TODS             0x0100
43 #define IEEE80211_FCTL_FROMDS           0x0200
44 #define IEEE80211_FCTL_MOREFRAGS        0x0400
45 #define IEEE80211_FCTL_RETRY            0x0800
46 #define IEEE80211_FCTL_PM               0x1000
47 #define IEEE80211_FCTL_MOREDATA         0x2000
48 #define IEEE80211_FCTL_PROTECTED        0x4000
49 #define IEEE80211_FCTL_ORDER            0x8000
50
51 #define IEEE80211_SCTL_FRAG             0x000F
52 #define IEEE80211_SCTL_SEQ              0xFFF0
53
54 #define IEEE80211_FTYPE_MGMT            0x0000
55 #define IEEE80211_FTYPE_CTL             0x0004
56 #define IEEE80211_FTYPE_DATA            0x0008
57
58 /* management */
59 #define IEEE80211_STYPE_ASSOC_REQ       0x0000
60 #define IEEE80211_STYPE_ASSOC_RESP      0x0010
61 #define IEEE80211_STYPE_REASSOC_REQ     0x0020
62 #define IEEE80211_STYPE_REASSOC_RESP    0x0030
63 #define IEEE80211_STYPE_PROBE_REQ       0x0040
64 #define IEEE80211_STYPE_PROBE_RESP      0x0050
65 #define IEEE80211_STYPE_BEACON          0x0080
66 #define IEEE80211_STYPE_ATIM            0x0090
67 #define IEEE80211_STYPE_DISASSOC        0x00A0
68 #define IEEE80211_STYPE_AUTH            0x00B0
69 #define IEEE80211_STYPE_DEAUTH          0x00C0
70 #define IEEE80211_STYPE_ACTION          0x00D0
71
72 /* control */
73 #define IEEE80211_STYPE_BACK_REQ        0x0080
74 #define IEEE80211_STYPE_BACK            0x0090
75 #define IEEE80211_STYPE_PSPOLL          0x00A0
76 #define IEEE80211_STYPE_RTS             0x00B0
77 #define IEEE80211_STYPE_CTS             0x00C0
78 #define IEEE80211_STYPE_ACK             0x00D0
79 #define IEEE80211_STYPE_CFEND           0x00E0
80 #define IEEE80211_STYPE_CFENDACK        0x00F0
81
82 /* data */
83 #define IEEE80211_STYPE_DATA                    0x0000
84 #define IEEE80211_STYPE_DATA_CFACK              0x0010
85 #define IEEE80211_STYPE_DATA_CFPOLL             0x0020
86 #define IEEE80211_STYPE_DATA_CFACKPOLL          0x0030
87 #define IEEE80211_STYPE_NULLFUNC                0x0040
88 #define IEEE80211_STYPE_CFACK                   0x0050
89 #define IEEE80211_STYPE_CFPOLL                  0x0060
90 #define IEEE80211_STYPE_CFACKPOLL               0x0070
91 #define IEEE80211_STYPE_QOS_DATA                0x0080
92 #define IEEE80211_STYPE_QOS_DATA_CFACK          0x0090
93 #define IEEE80211_STYPE_QOS_DATA_CFPOLL         0x00A0
94 #define IEEE80211_STYPE_QOS_DATA_CFACKPOLL      0x00B0
95 #define IEEE80211_STYPE_QOS_NULLFUNC            0x00C0
96 #define IEEE80211_STYPE_QOS_CFACK               0x00D0
97 #define IEEE80211_STYPE_QOS_CFPOLL              0x00E0
98 #define IEEE80211_STYPE_QOS_CFACKPOLL           0x00F0
99
100
101 /* miscellaneous IEEE 802.11 constants */
102 #define IEEE80211_MAX_FRAG_THRESHOLD    2352
103 #define IEEE80211_MAX_RTS_THRESHOLD     2353
104 #define IEEE80211_MAX_AID               2007
105 #define IEEE80211_MAX_TIM_LEN           251
106 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
107    6.2.1.1.2.
108
109    802.11e clarifies the figure in section 7.1.2. The frame body is
110    up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
111 #define IEEE80211_MAX_DATA_LEN          2304
112 /* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
113 #define IEEE80211_MAX_FRAME_LEN         2352
114
115 #define IEEE80211_MAX_SSID_LEN          32
116
117 #define IEEE80211_MAX_MESH_ID_LEN       32
118
119 #define IEEE80211_QOS_CTL_LEN           2
120 #define IEEE80211_QOS_CTL_TID_MASK      0x000F
121 #define IEEE80211_QOS_CTL_TAG1D_MASK    0x0007
122
123 /* U-APSD queue for WMM IEs sent by AP */
124 #define IEEE80211_WMM_IE_AP_QOSINFO_UAPSD       (1<<7)
125 #define IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK  0x0f
126
127 /* U-APSD queues for WMM IEs sent by STA */
128 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VO      (1<<0)
129 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_VI      (1<<1)
130 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BK      (1<<2)
131 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_BE      (1<<3)
132 #define IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK    0x0f
133
134 /* U-APSD max SP length for WMM IEs sent by STA */
135 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL     0x00
136 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_2       0x01
137 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_4       0x02
138 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_6       0x03
139 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK    0x03
140 #define IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT   5
141
142 #define IEEE80211_HT_CTL_LEN            4
143
144 struct ieee80211_hdr {
145         __le16 frame_control;
146         __le16 duration_id;
147         u8 addr1[6];
148         u8 addr2[6];
149         u8 addr3[6];
150         __le16 seq_ctrl;
151         u8 addr4[6];
152 } __attribute__ ((packed));
153
154 struct ieee80211_hdr_3addr {
155         __le16 frame_control;
156         __le16 duration_id;
157         u8 addr1[6];
158         u8 addr2[6];
159         u8 addr3[6];
160         __le16 seq_ctrl;
161 } __attribute__ ((packed));
162
163 struct ieee80211_qos_hdr {
164         __le16 frame_control;
165         __le16 duration_id;
166         u8 addr1[6];
167         u8 addr2[6];
168         u8 addr3[6];
169         __le16 seq_ctrl;
170         __le16 qos_ctrl;
171 } __attribute__ ((packed));
172
173 /**
174  * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
175  * @fc: frame control bytes in little-endian byteorder
176  */
177 static inline int ieee80211_has_tods(__le16 fc)
178 {
179         return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
180 }
181
182 /**
183  * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
184  * @fc: frame control bytes in little-endian byteorder
185  */
186 static inline int ieee80211_has_fromds(__le16 fc)
187 {
188         return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
189 }
190
191 /**
192  * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
193  * @fc: frame control bytes in little-endian byteorder
194  */
195 static inline int ieee80211_has_a4(__le16 fc)
196 {
197         __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
198         return (fc & tmp) == tmp;
199 }
200
201 /**
202  * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
203  * @fc: frame control bytes in little-endian byteorder
204  */
205 static inline int ieee80211_has_morefrags(__le16 fc)
206 {
207         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
208 }
209
210 /**
211  * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
212  * @fc: frame control bytes in little-endian byteorder
213  */
214 static inline int ieee80211_has_retry(__le16 fc)
215 {
216         return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
217 }
218
219 /**
220  * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
221  * @fc: frame control bytes in little-endian byteorder
222  */
223 static inline int ieee80211_has_pm(__le16 fc)
224 {
225         return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
226 }
227
228 /**
229  * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
230  * @fc: frame control bytes in little-endian byteorder
231  */
232 static inline int ieee80211_has_moredata(__le16 fc)
233 {
234         return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
235 }
236
237 /**
238  * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
239  * @fc: frame control bytes in little-endian byteorder
240  */
241 static inline int ieee80211_has_protected(__le16 fc)
242 {
243         return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
244 }
245
246 /**
247  * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
248  * @fc: frame control bytes in little-endian byteorder
249  */
250 static inline int ieee80211_has_order(__le16 fc)
251 {
252         return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
253 }
254
255 /**
256  * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
257  * @fc: frame control bytes in little-endian byteorder
258  */
259 static inline int ieee80211_is_mgmt(__le16 fc)
260 {
261         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
262                cpu_to_le16(IEEE80211_FTYPE_MGMT);
263 }
264
265 /**
266  * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
267  * @fc: frame control bytes in little-endian byteorder
268  */
269 static inline int ieee80211_is_ctl(__le16 fc)
270 {
271         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
272                cpu_to_le16(IEEE80211_FTYPE_CTL);
273 }
274
275 /**
276  * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
277  * @fc: frame control bytes in little-endian byteorder
278  */
279 static inline int ieee80211_is_data(__le16 fc)
280 {
281         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
282                cpu_to_le16(IEEE80211_FTYPE_DATA);
283 }
284
285 /**
286  * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
287  * @fc: frame control bytes in little-endian byteorder
288  */
289 static inline int ieee80211_is_data_qos(__le16 fc)
290 {
291         /*
292          * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
293          * to check the one bit
294          */
295         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
296                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
297 }
298
299 /**
300  * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
301  * @fc: frame control bytes in little-endian byteorder
302  */
303 static inline int ieee80211_is_data_present(__le16 fc)
304 {
305         /*
306          * mask with 0x40 and test that that bit is clear to only return true
307          * for the data-containing substypes.
308          */
309         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
310                cpu_to_le16(IEEE80211_FTYPE_DATA);
311 }
312
313 /**
314  * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
315  * @fc: frame control bytes in little-endian byteorder
316  */
317 static inline int ieee80211_is_assoc_req(__le16 fc)
318 {
319         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
320                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
321 }
322
323 /**
324  * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
325  * @fc: frame control bytes in little-endian byteorder
326  */
327 static inline int ieee80211_is_assoc_resp(__le16 fc)
328 {
329         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
330                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
331 }
332
333 /**
334  * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
335  * @fc: frame control bytes in little-endian byteorder
336  */
337 static inline int ieee80211_is_reassoc_req(__le16 fc)
338 {
339         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
340                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
341 }
342
343 /**
344  * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
345  * @fc: frame control bytes in little-endian byteorder
346  */
347 static inline int ieee80211_is_reassoc_resp(__le16 fc)
348 {
349         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
350                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
351 }
352
353 /**
354  * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
355  * @fc: frame control bytes in little-endian byteorder
356  */
357 static inline int ieee80211_is_probe_req(__le16 fc)
358 {
359         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
360                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
361 }
362
363 /**
364  * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
365  * @fc: frame control bytes in little-endian byteorder
366  */
367 static inline int ieee80211_is_probe_resp(__le16 fc)
368 {
369         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
370                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
371 }
372
373 /**
374  * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
375  * @fc: frame control bytes in little-endian byteorder
376  */
377 static inline int ieee80211_is_beacon(__le16 fc)
378 {
379         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
380                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
381 }
382
383 /**
384  * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
385  * @fc: frame control bytes in little-endian byteorder
386  */
387 static inline int ieee80211_is_atim(__le16 fc)
388 {
389         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
390                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
391 }
392
393 /**
394  * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
395  * @fc: frame control bytes in little-endian byteorder
396  */
397 static inline int ieee80211_is_disassoc(__le16 fc)
398 {
399         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
400                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
401 }
402
403 /**
404  * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
405  * @fc: frame control bytes in little-endian byteorder
406  */
407 static inline int ieee80211_is_auth(__le16 fc)
408 {
409         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
410                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
411 }
412
413 /**
414  * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
415  * @fc: frame control bytes in little-endian byteorder
416  */
417 static inline int ieee80211_is_deauth(__le16 fc)
418 {
419         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
420                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
421 }
422
423 /**
424  * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
425  * @fc: frame control bytes in little-endian byteorder
426  */
427 static inline int ieee80211_is_action(__le16 fc)
428 {
429         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
430                cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
431 }
432
433 /**
434  * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
435  * @fc: frame control bytes in little-endian byteorder
436  */
437 static inline int ieee80211_is_back_req(__le16 fc)
438 {
439         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
440                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
441 }
442
443 /**
444  * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
445  * @fc: frame control bytes in little-endian byteorder
446  */
447 static inline int ieee80211_is_back(__le16 fc)
448 {
449         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
450                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
451 }
452
453 /**
454  * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
455  * @fc: frame control bytes in little-endian byteorder
456  */
457 static inline int ieee80211_is_pspoll(__le16 fc)
458 {
459         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
460                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
461 }
462
463 /**
464  * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
465  * @fc: frame control bytes in little-endian byteorder
466  */
467 static inline int ieee80211_is_rts(__le16 fc)
468 {
469         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
470                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
471 }
472
473 /**
474  * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
475  * @fc: frame control bytes in little-endian byteorder
476  */
477 static inline int ieee80211_is_cts(__le16 fc)
478 {
479         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
480                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
481 }
482
483 /**
484  * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
485  * @fc: frame control bytes in little-endian byteorder
486  */
487 static inline int ieee80211_is_ack(__le16 fc)
488 {
489         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
490                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
491 }
492
493 /**
494  * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
495  * @fc: frame control bytes in little-endian byteorder
496  */
497 static inline int ieee80211_is_cfend(__le16 fc)
498 {
499         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
500                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
501 }
502
503 /**
504  * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
505  * @fc: frame control bytes in little-endian byteorder
506  */
507 static inline int ieee80211_is_cfendack(__le16 fc)
508 {
509         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
510                cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
511 }
512
513 /**
514  * ieee80211_is_nullfunc - check if frame is a regular (non-QoS) nullfunc frame
515  * @fc: frame control bytes in little-endian byteorder
516  */
517 static inline int ieee80211_is_nullfunc(__le16 fc)
518 {
519         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
520                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
521 }
522
523 /**
524  * ieee80211_is_qos_nullfunc - check if frame is a QoS nullfunc frame
525  * @fc: frame control bytes in little-endian byteorder
526  */
527 static inline int ieee80211_is_qos_nullfunc(__le16 fc)
528 {
529         return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
530                cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
531 }
532
533 struct ieee80211s_hdr {
534         u8 flags;
535         u8 ttl;
536         __le32 seqnum;
537         u8 eaddr1[6];
538         u8 eaddr2[6];
539 } __attribute__ ((packed));
540
541 /* Mesh flags */
542 #define MESH_FLAGS_AE_A4        0x1
543 #define MESH_FLAGS_AE_A5_A6     0x2
544 #define MESH_FLAGS_AE           0x3
545 #define MESH_FLAGS_PS_DEEP      0x4
546
547 /**
548  * struct ieee80211_quiet_ie
549  *
550  * This structure refers to "Quiet information element"
551  */
552 struct ieee80211_quiet_ie {
553         u8 count;
554         u8 period;
555         __le16 duration;
556         __le16 offset;
557 } __attribute__ ((packed));
558
559 /**
560  * struct ieee80211_msrment_ie
561  *
562  * This structure refers to "Measurement Request/Report information element"
563  */
564 struct ieee80211_msrment_ie {
565         u8 token;
566         u8 mode;
567         u8 type;
568         u8 request[0];
569 } __attribute__ ((packed));
570
571 /**
572  * struct ieee80211_channel_sw_ie
573  *
574  * This structure refers to "Channel Switch Announcement information element"
575  */
576 struct ieee80211_channel_sw_ie {
577         u8 mode;
578         u8 new_ch_num;
579         u8 count;
580 } __attribute__ ((packed));
581
582 /**
583  * struct ieee80211_tim
584  *
585  * This structure refers to "Traffic Indication Map information element"
586  */
587 struct ieee80211_tim_ie {
588         u8 dtim_count;
589         u8 dtim_period;
590         u8 bitmap_ctrl;
591         /* variable size: 1 - 251 bytes */
592         u8 virtual_map[1];
593 } __attribute__ ((packed));
594
595 /**
596  * struct ieee80211_meshconf_ie
597  *
598  * This structure refers to "Mesh Configuration information element"
599  */
600 struct ieee80211_meshconf_ie {
601         u8 meshconf_psel;
602         u8 meshconf_pmetric;
603         u8 meshconf_congest;
604         u8 meshconf_synch;
605         u8 meshconf_auth;
606         u8 meshconf_form;
607         u8 meshconf_cap;
608 } __attribute__ ((packed));
609
610 /**
611  * struct ieee80211_rann_ie
612  *
613  * This structure refers to "Root Announcement information element"
614  */
615 struct ieee80211_rann_ie {
616         u8 rann_flags;
617         u8 rann_hopcount;
618         u8 rann_ttl;
619         u8 rann_addr[6];
620         u32 rann_seq;
621         u32 rann_metric;
622 } __attribute__ ((packed));
623
624 #define WLAN_SA_QUERY_TR_ID_LEN 2
625
626 struct ieee80211_mgmt {
627         __le16 frame_control;
628         __le16 duration;
629         u8 da[6];
630         u8 sa[6];
631         u8 bssid[6];
632         __le16 seq_ctrl;
633         union {
634                 struct {
635                         __le16 auth_alg;
636                         __le16 auth_transaction;
637                         __le16 status_code;
638                         /* possibly followed by Challenge text */
639                         u8 variable[0];
640                 } __attribute__ ((packed)) auth;
641                 struct {
642                         __le16 reason_code;
643                 } __attribute__ ((packed)) deauth;
644                 struct {
645                         __le16 capab_info;
646                         __le16 listen_interval;
647                         /* followed by SSID and Supported rates */
648                         u8 variable[0];
649                 } __attribute__ ((packed)) assoc_req;
650                 struct {
651                         __le16 capab_info;
652                         __le16 status_code;
653                         __le16 aid;
654                         /* followed by Supported rates */
655                         u8 variable[0];
656                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
657                 struct {
658                         __le16 capab_info;
659                         __le16 listen_interval;
660                         u8 current_ap[6];
661                         /* followed by SSID and Supported rates */
662                         u8 variable[0];
663                 } __attribute__ ((packed)) reassoc_req;
664                 struct {
665                         __le16 reason_code;
666                 } __attribute__ ((packed)) disassoc;
667                 struct {
668                         __le64 timestamp;
669                         __le16 beacon_int;
670                         __le16 capab_info;
671                         /* followed by some of SSID, Supported rates,
672                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
673                         u8 variable[0];
674                 } __attribute__ ((packed)) beacon;
675                 struct {
676                         /* only variable items: SSID, Supported rates */
677                         u8 variable[0];
678                 } __attribute__ ((packed)) probe_req;
679                 struct {
680                         __le64 timestamp;
681                         __le16 beacon_int;
682                         __le16 capab_info;
683                         /* followed by some of SSID, Supported rates,
684                          * FH Params, DS Params, CF Params, IBSS Params */
685                         u8 variable[0];
686                 } __attribute__ ((packed)) probe_resp;
687                 struct {
688                         u8 category;
689                         union {
690                                 struct {
691                                         u8 action_code;
692                                         u8 dialog_token;
693                                         u8 status_code;
694                                         u8 variable[0];
695                                 } __attribute__ ((packed)) wme_action;
696                                 struct{
697                                         u8 action_code;
698                                         u8 element_id;
699                                         u8 length;
700                                         struct ieee80211_channel_sw_ie sw_elem;
701                                 } __attribute__((packed)) chan_switch;
702                                 struct{
703                                         u8 action_code;
704                                         u8 dialog_token;
705                                         u8 element_id;
706                                         u8 length;
707                                         struct ieee80211_msrment_ie msr_elem;
708                                 } __attribute__((packed)) measurement;
709                                 struct{
710                                         u8 action_code;
711                                         u8 dialog_token;
712                                         __le16 capab;
713                                         __le16 timeout;
714                                         __le16 start_seq_num;
715                                 } __attribute__((packed)) addba_req;
716                                 struct{
717                                         u8 action_code;
718                                         u8 dialog_token;
719                                         __le16 status;
720                                         __le16 capab;
721                                         __le16 timeout;
722                                 } __attribute__((packed)) addba_resp;
723                                 struct{
724                                         u8 action_code;
725                                         __le16 params;
726                                         __le16 reason_code;
727                                 } __attribute__((packed)) delba;
728                                 struct{
729                                         u8 action_code;
730                                         /* capab_info for open and confirm,
731                                          * reason for close
732                                          */
733                                         __le16 aux;
734                                         /* Followed in plink_confirm by status
735                                          * code, AID and supported rates,
736                                          * and directly by supported rates in
737                                          * plink_open and plink_close
738                                          */
739                                         u8 variable[0];
740                                 } __attribute__((packed)) plink_action;
741                                 struct{
742                                         u8 action_code;
743                                         u8 variable[0];
744                                 } __attribute__((packed)) mesh_action;
745                                 struct {
746                                         u8 action;
747                                         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
748                                 } __attribute__ ((packed)) sa_query;
749                                 struct {
750                                         u8 action;
751                                         u8 smps_control;
752                                 } __attribute__ ((packed)) ht_smps;
753                         } u;
754                 } __attribute__ ((packed)) action;
755         } u;
756 } __attribute__ ((packed));
757
758 /* mgmt header + 1 byte category code */
759 #define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
760
761
762 /* Management MIC information element (IEEE 802.11w) */
763 struct ieee80211_mmie {
764         u8 element_id;
765         u8 length;
766         __le16 key_id;
767         u8 sequence_number[6];
768         u8 mic[8];
769 } __attribute__ ((packed));
770
771 /* Control frames */
772 struct ieee80211_rts {
773         __le16 frame_control;
774         __le16 duration;
775         u8 ra[6];
776         u8 ta[6];
777 } __attribute__ ((packed));
778
779 struct ieee80211_cts {
780         __le16 frame_control;
781         __le16 duration;
782         u8 ra[6];
783 } __attribute__ ((packed));
784
785 struct ieee80211_pspoll {
786         __le16 frame_control;
787         __le16 aid;
788         u8 bssid[6];
789         u8 ta[6];
790 } __attribute__ ((packed));
791
792 /**
793  * struct ieee80211_bar - HT Block Ack Request
794  *
795  * This structure refers to "HT BlockAckReq" as
796  * described in 802.11n draft section 7.2.1.7.1
797  */
798 struct ieee80211_bar {
799         __le16 frame_control;
800         __le16 duration;
801         __u8 ra[6];
802         __u8 ta[6];
803         __le16 control;
804         __le16 start_seq_num;
805 } __attribute__((packed));
806
807 /* 802.11 BAR control masks */
808 #define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL     0x0000
809 #define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA  0x0004
810
811
812 #define IEEE80211_HT_MCS_MASK_LEN               10
813
814 /**
815  * struct ieee80211_mcs_info - MCS information
816  * @rx_mask: RX mask
817  * @rx_highest: highest supported RX rate. If set represents
818  *      the highest supported RX data rate in units of 1 Mbps.
819  *      If this field is 0 this value should not be used to
820  *      consider the highest RX data rate supported.
821  * @tx_params: TX parameters
822  */
823 struct ieee80211_mcs_info {
824         u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
825         __le16 rx_highest;
826         u8 tx_params;
827         u8 reserved[3];
828 } __attribute__((packed));
829
830 /* 802.11n HT capability MSC set */
831 #define IEEE80211_HT_MCS_RX_HIGHEST_MASK        0x3ff
832 #define IEEE80211_HT_MCS_TX_DEFINED             0x01
833 #define IEEE80211_HT_MCS_TX_RX_DIFF             0x02
834 /* value 0 == 1 stream etc */
835 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK    0x0C
836 #define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT   2
837 #define         IEEE80211_HT_MCS_TX_MAX_STREAMS 4
838 #define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION  0x10
839
840 /*
841  * 802.11n D5.0 20.3.5 / 20.6 says:
842  * - indices 0 to 7 and 32 are single spatial stream
843  * - 8 to 31 are multiple spatial streams using equal modulation
844  *   [8..15 for two streams, 16..23 for three and 24..31 for four]
845  * - remainder are multiple spatial streams using unequal modulation
846  */
847 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
848 #define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
849         (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)
850
851 /**
852  * struct ieee80211_ht_cap - HT capabilities
853  *
854  * This structure is the "HT capabilities element" as
855  * described in 802.11n D5.0 7.3.2.57
856  */
857 struct ieee80211_ht_cap {
858         __le16 cap_info;
859         u8 ampdu_params_info;
860
861         /* 16 bytes MCS information */
862         struct ieee80211_mcs_info mcs;
863
864         __le16 extended_ht_cap_info;
865         __le32 tx_BF_cap_info;
866         u8 antenna_selection_info;
867 } __attribute__ ((packed));
868
869 /* 802.11n HT capabilities masks (for cap_info) */
870 #define IEEE80211_HT_CAP_LDPC_CODING            0x0001
871 #define IEEE80211_HT_CAP_SUP_WIDTH_20_40        0x0002
872 #define IEEE80211_HT_CAP_SM_PS                  0x000C
873 #define         IEEE80211_HT_CAP_SM_PS_SHIFT    2
874 #define IEEE80211_HT_CAP_GRN_FLD                0x0010
875 #define IEEE80211_HT_CAP_SGI_20                 0x0020
876 #define IEEE80211_HT_CAP_SGI_40                 0x0040
877 #define IEEE80211_HT_CAP_TX_STBC                0x0080
878 #define IEEE80211_HT_CAP_RX_STBC                0x0300
879 #define         IEEE80211_HT_CAP_RX_STBC_SHIFT  8
880 #define IEEE80211_HT_CAP_DELAY_BA               0x0400
881 #define IEEE80211_HT_CAP_MAX_AMSDU              0x0800
882 #define IEEE80211_HT_CAP_DSSSCCK40              0x1000
883 #define IEEE80211_HT_CAP_RESERVED               0x2000
884 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT       0x4000
885 #define IEEE80211_HT_CAP_LSIG_TXOP_PROT         0x8000
886
887 /* 802.11n HT extended capabilities masks (for extended_ht_cap_info) */
888 #define IEEE80211_HT_EXT_CAP_PCO                0x0001
889 #define IEEE80211_HT_EXT_CAP_PCO_TIME           0x0006
890 #define         IEEE80211_HT_EXT_CAP_PCO_TIME_SHIFT     1
891 #define IEEE80211_HT_EXT_CAP_MCS_FB             0x0300
892 #define         IEEE80211_HT_EXT_CAP_MCS_FB_SHIFT       8
893 #define IEEE80211_HT_EXT_CAP_HTC_SUP            0x0400
894 #define IEEE80211_HT_EXT_CAP_RD_RESPONDER       0x0800
895
896 /* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
897 #define IEEE80211_HT_AMPDU_PARM_FACTOR          0x03
898 #define IEEE80211_HT_AMPDU_PARM_DENSITY         0x1C
899 #define         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT   2
900
901 /*
902  * Maximum length of AMPDU that the STA can receive.
903  * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
904  */
905 enum ieee80211_max_ampdu_length_exp {
906         IEEE80211_HT_MAX_AMPDU_8K = 0,
907         IEEE80211_HT_MAX_AMPDU_16K = 1,
908         IEEE80211_HT_MAX_AMPDU_32K = 2,
909         IEEE80211_HT_MAX_AMPDU_64K = 3
910 };
911
912 #define IEEE80211_HT_MAX_AMPDU_FACTOR 13
913
914 /* Minimum MPDU start spacing */
915 enum ieee80211_min_mpdu_spacing {
916         IEEE80211_HT_MPDU_DENSITY_NONE = 0,     /* No restriction */
917         IEEE80211_HT_MPDU_DENSITY_0_25 = 1,     /* 1/4 usec */
918         IEEE80211_HT_MPDU_DENSITY_0_5 = 2,      /* 1/2 usec */
919         IEEE80211_HT_MPDU_DENSITY_1 = 3,        /* 1 usec */
920         IEEE80211_HT_MPDU_DENSITY_2 = 4,        /* 2 usec */
921         IEEE80211_HT_MPDU_DENSITY_4 = 5,        /* 4 usec */
922         IEEE80211_HT_MPDU_DENSITY_8 = 6,        /* 8 usec */
923         IEEE80211_HT_MPDU_DENSITY_16 = 7        /* 16 usec */
924 };
925
926 /**
927  * struct ieee80211_ht_info - HT information
928  *
929  * This structure is the "HT information element" as
930  * described in 802.11n D5.0 7.3.2.58
931  */
932 struct ieee80211_ht_info {
933         u8 control_chan;
934         u8 ht_param;
935         __le16 operation_mode;
936         __le16 stbc_param;
937         u8 basic_set[16];
938 } __attribute__ ((packed));
939
940 /* for ht_param */
941 #define IEEE80211_HT_PARAM_CHA_SEC_OFFSET               0x03
942 #define         IEEE80211_HT_PARAM_CHA_SEC_NONE         0x00
943 #define         IEEE80211_HT_PARAM_CHA_SEC_ABOVE        0x01
944 #define         IEEE80211_HT_PARAM_CHA_SEC_BELOW        0x03
945 #define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY               0x04
946 #define IEEE80211_HT_PARAM_RIFS_MODE                    0x08
947 #define IEEE80211_HT_PARAM_SPSMP_SUPPORT                0x10
948 #define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN           0xE0
949
950 /* for operation_mode */
951 #define IEEE80211_HT_OP_MODE_PROTECTION                 0x0003
952 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONE            0
953 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER       1
954 #define         IEEE80211_HT_OP_MODE_PROTECTION_20MHZ           2
955 #define         IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED     3
956 #define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT           0x0004
957 #define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT           0x0010
958
959 /* for stbc_param */
960 #define IEEE80211_HT_STBC_PARAM_DUAL_BEACON             0x0040
961 #define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT           0x0080
962 #define IEEE80211_HT_STBC_PARAM_STBC_BEACON             0x0100
963 #define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT      0x0200
964 #define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE              0x0400
965 #define IEEE80211_HT_STBC_PARAM_PCO_PHASE               0x0800
966
967
968 /* block-ack parameters */
969 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
970 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
971 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFC0
972 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
973 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
974
975 /*
976  * A-PMDU buffer sizes
977  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
978  */
979 #define IEEE80211_MIN_AMPDU_BUF 0x8
980 #define IEEE80211_MAX_AMPDU_BUF 0x40
981
982
983 /* Spatial Multiplexing Power Save Modes (for capability) */
984 #define WLAN_HT_CAP_SM_PS_STATIC        0
985 #define WLAN_HT_CAP_SM_PS_DYNAMIC       1
986 #define WLAN_HT_CAP_SM_PS_INVALID       2
987 #define WLAN_HT_CAP_SM_PS_DISABLED      3
988
989 /* for SM power control field lower two bits */
990 #define WLAN_HT_SMPS_CONTROL_DISABLED   0
991 #define WLAN_HT_SMPS_CONTROL_STATIC     1
992 #define WLAN_HT_SMPS_CONTROL_DYNAMIC    3
993
994 /* Authentication algorithms */
995 #define WLAN_AUTH_OPEN 0
996 #define WLAN_AUTH_SHARED_KEY 1
997 #define WLAN_AUTH_FT 2
998 #define WLAN_AUTH_SAE 3
999 #define WLAN_AUTH_LEAP 128
1000
1001 #define WLAN_AUTH_CHALLENGE_LEN 128
1002
1003 #define WLAN_CAPABILITY_ESS             (1<<0)
1004 #define WLAN_CAPABILITY_IBSS            (1<<1)
1005
1006 /* A mesh STA sets the ESS and IBSS capability bits to zero */
1007 #define WLAN_CAPABILITY_IS_MBSS(cap)    \
1008         (!((cap) & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)))
1009
1010 #define WLAN_CAPABILITY_CF_POLLABLE     (1<<2)
1011 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
1012 #define WLAN_CAPABILITY_PRIVACY         (1<<4)
1013 #define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
1014 #define WLAN_CAPABILITY_PBCC            (1<<6)
1015 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
1016
1017 /* 802.11h */
1018 #define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
1019 #define WLAN_CAPABILITY_QOS             (1<<9)
1020 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
1021 #define WLAN_CAPABILITY_DSSS_OFDM       (1<<13)
1022 /* measurement */
1023 #define IEEE80211_SPCT_MSR_RPRT_MODE_LATE       (1<<0)
1024 #define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE  (1<<1)
1025 #define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED    (1<<2)
1026
1027 #define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC      0
1028 #define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA        1
1029 #define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI        2
1030
1031
1032 /* 802.11g ERP information element */
1033 #define WLAN_ERP_NON_ERP_PRESENT (1<<0)
1034 #define WLAN_ERP_USE_PROTECTION (1<<1)
1035 #define WLAN_ERP_BARKER_PREAMBLE (1<<2)
1036
1037 /* WLAN_ERP_BARKER_PREAMBLE values */
1038 enum {
1039         WLAN_ERP_PREAMBLE_SHORT = 0,
1040         WLAN_ERP_PREAMBLE_LONG = 1,
1041 };
1042
1043 /* Status codes */
1044 enum ieee80211_statuscode {
1045         WLAN_STATUS_SUCCESS = 0,
1046         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
1047         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
1048         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
1049         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
1050         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
1051         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
1052         WLAN_STATUS_CHALLENGE_FAIL = 15,
1053         WLAN_STATUS_AUTH_TIMEOUT = 16,
1054         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
1055         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
1056         /* 802.11b */
1057         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
1058         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
1059         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
1060         /* 802.11h */
1061         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
1062         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
1063         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
1064         /* 802.11g */
1065         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
1066         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
1067         /* 802.11w */
1068         WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY = 30,
1069         WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION = 31,
1070         /* 802.11i */
1071         WLAN_STATUS_INVALID_IE = 40,
1072         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
1073         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
1074         WLAN_STATUS_INVALID_AKMP = 43,
1075         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
1076         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
1077         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
1078         /* 802.11e */
1079         WLAN_STATUS_UNSPECIFIED_QOS = 32,
1080         WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
1081         WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
1082         WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
1083         WLAN_STATUS_REQUEST_DECLINED = 37,
1084         WLAN_STATUS_INVALID_QOS_PARAM = 38,
1085         WLAN_STATUS_CHANGE_TSPEC = 39,
1086         WLAN_STATUS_WAIT_TS_DELAY = 47,
1087         WLAN_STATUS_NO_DIRECT_LINK = 48,
1088         WLAN_STATUS_STA_NOT_PRESENT = 49,
1089         WLAN_STATUS_STA_NOT_QSTA = 50,
1090         /* 802.11s */
1091         WLAN_STATUS_ANTI_CLOG_REQUIRED = 76,
1092         WLAN_STATUS_FCG_NOT_SUPP = 78,
1093         WLAN_STATUS_STA_NO_TBTT = 78,
1094 };
1095
1096
1097 /* Reason codes */
1098 enum ieee80211_reasoncode {
1099         WLAN_REASON_UNSPECIFIED = 1,
1100         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
1101         WLAN_REASON_DEAUTH_LEAVING = 3,
1102         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
1103         WLAN_REASON_DISASSOC_AP_BUSY = 5,
1104         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
1105         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
1106         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
1107         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
1108         /* 802.11h */
1109         WLAN_REASON_DISASSOC_BAD_POWER = 10,
1110         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
1111         /* 802.11i */
1112         WLAN_REASON_INVALID_IE = 13,
1113         WLAN_REASON_MIC_FAILURE = 14,
1114         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
1115         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
1116         WLAN_REASON_IE_DIFFERENT = 17,
1117         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
1118         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
1119         WLAN_REASON_INVALID_AKMP = 20,
1120         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
1121         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
1122         WLAN_REASON_IEEE8021X_FAILED = 23,
1123         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
1124         /* 802.11e */
1125         WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
1126         WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
1127         WLAN_REASON_DISASSOC_LOW_ACK = 34,
1128         WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
1129         WLAN_REASON_QSTA_LEAVE_QBSS = 36,
1130         WLAN_REASON_QSTA_NOT_USE = 37,
1131         WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
1132         WLAN_REASON_QSTA_TIMEOUT = 39,
1133         WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
1134         /* 802.11s */
1135         WLAN_REASON_MESH_PEER_CANCELED = 52,
1136         WLAN_REASON_MESH_MAX_PEERS = 53,
1137         WLAN_REASON_MESH_CONFIG = 54,
1138         WLAN_REASON_MESH_CLOSE = 55,
1139         WLAN_REASON_MESH_MAX_RETRIES = 56,
1140         WLAN_REASON_MESH_CONFIRM_TIMEOUT = 57,
1141         WLAN_REASON_MESH_INVALID_GTK = 58,
1142         WLAN_REASON_MESH_INCONSISTENT_PARAM = 59,
1143         WLAN_REASON_MESH_INVALID_SECURITY = 60,
1144         WLAN_REASON_MESH_PATH_ERROR = 61,
1145         WLAN_REASON_MESH_PATH_NOFORWARD = 62,
1146         WLAN_REASON_MESH_PATH_DEST_UNREACHABLE = 63,
1147         WLAN_REASON_MAC_EXISTS_IN_MBSS = 64,
1148         WLAN_REASON_MESH_CHAN_REGULATORY = 65,
1149         WLAN_REASON_MESH_CHAN = 66,
1150 };
1151
1152
1153 /* Information Element IDs */
1154 enum ieee80211_eid {
1155         WLAN_EID_SSID = 0,
1156         WLAN_EID_SUPP_RATES = 1,
1157         WLAN_EID_FH_PARAMS = 2,
1158         WLAN_EID_DS_PARAMS = 3,
1159         WLAN_EID_CF_PARAMS = 4,
1160         WLAN_EID_TIM = 5,
1161         WLAN_EID_IBSS_PARAMS = 6,
1162         WLAN_EID_CHALLENGE = 16,
1163
1164         WLAN_EID_COUNTRY = 7,
1165         WLAN_EID_HP_PARAMS = 8,
1166         WLAN_EID_HP_TABLE = 9,
1167         WLAN_EID_REQUEST = 10,
1168
1169         WLAN_EID_QBSS_LOAD = 11,
1170         WLAN_EID_EDCA_PARAM_SET = 12,
1171         WLAN_EID_TSPEC = 13,
1172         WLAN_EID_TCLAS = 14,
1173         WLAN_EID_SCHEDULE = 15,
1174         WLAN_EID_TS_DELAY = 43,
1175         WLAN_EID_TCLAS_PROCESSING = 44,
1176         WLAN_EID_QOS_CAPA = 46,
1177         /* 802.11s */
1178         WLAN_EID_MESH_CONFIG = 113,
1179         WLAN_EID_MESH_ID = 114,
1180         WLAN_EID_LINK_METRIC_REPORT = 115,
1181         WLAN_EID_CONGESTION_NOTIFICATION = 116,
1182         /* Note that the Peer Link IE has been replaced with the similar
1183          * Peer Management IE.  We will keep the former definition until mesh
1184          * code is changed to comply with latest 802.11s drafts.
1185          */
1186         WLAN_EID_PEER_LINK = 55,  /* no longer in 802.11s drafts */
1187         WLAN_EID_PEER_MGMT = 117,
1188         WLAN_EID_CHAN_SWITCH_PARAM = 118,
1189         WLAN_EID_MESH_AWAKE_WINDOW = 119,
1190         WLAN_EID_BEACON_TIMING = 120,
1191         WLAN_EID_MCCAOP_SETUP_REQ = 121,
1192         WLAN_EID_MCCAOP_SETUP_RESP = 122,
1193         WLAN_EID_MCCAOP_ADVERT = 123,
1194         WLAN_EID_MCCAOP_TEARDOWN = 124,
1195         WLAN_EID_GANN = 125,
1196         WLAN_EID_RANN = 126,
1197         WLAN_EID_PREQ = 130,
1198         WLAN_EID_PREP = 131,
1199         WLAN_EID_PERR = 132,
1200         WLAN_EID_PXU = 137,
1201         WLAN_EID_PXUC = 138,
1202         WLAN_EID_AUTH_MESH_PEER_EXCH = 139,
1203         WLAN_EID_MIC = 140,
1204
1205         WLAN_EID_PWR_CONSTRAINT = 32,
1206         WLAN_EID_PWR_CAPABILITY = 33,
1207         WLAN_EID_TPC_REQUEST = 34,
1208         WLAN_EID_TPC_REPORT = 35,
1209         WLAN_EID_SUPPORTED_CHANNELS = 36,
1210         WLAN_EID_CHANNEL_SWITCH = 37,
1211         WLAN_EID_MEASURE_REQUEST = 38,
1212         WLAN_EID_MEASURE_REPORT = 39,
1213         WLAN_EID_QUIET = 40,
1214         WLAN_EID_IBSS_DFS = 41,
1215
1216         WLAN_EID_ERP_INFO = 42,
1217         WLAN_EID_EXT_SUPP_RATES = 50,
1218
1219         WLAN_EID_HT_CAPABILITY = 45,
1220         WLAN_EID_HT_INFORMATION = 61,
1221
1222         WLAN_EID_RSN = 48,
1223         WLAN_EID_MMIE = 76,
1224         WLAN_EID_WPA = 221,
1225         WLAN_EID_GENERIC = 221,
1226         WLAN_EID_VENDOR_SPECIFIC = 221,
1227         WLAN_EID_QOS_PARAMETER = 222,
1228
1229         WLAN_EID_AP_CHAN_REPORT = 51,
1230         WLAN_EID_NEIGHBOR_REPORT = 52,
1231         WLAN_EID_RCPI = 53,
1232         WLAN_EID_BSS_AVG_ACCESS_DELAY = 63,
1233         WLAN_EID_ANTENNA_INFO = 64,
1234         WLAN_EID_RSNI = 65,
1235         WLAN_EID_MEASUREMENT_PILOT_TX_INFO = 66,
1236         WLAN_EID_BSS_AVAILABLE_CAPACITY = 67,
1237         WLAN_EID_BSS_AC_ACCESS_DELAY = 68,
1238         WLAN_EID_RRM_ENABLED_CAPABILITIES = 70,
1239         WLAN_EID_MULTIPLE_BSSID = 71,
1240         WLAN_EID_BSS_COEX_2040 = 72,
1241         WLAN_EID_OVERLAP_BSS_SCAN_PARAM = 74,
1242         WLAN_EID_EXT_CAPABILITY = 127,
1243
1244         WLAN_EID_MOBILITY_DOMAIN = 54,
1245         WLAN_EID_FAST_BSS_TRANSITION = 55,
1246         WLAN_EID_TIMEOUT_INTERVAL = 56,
1247         WLAN_EID_RIC_DATA = 57,
1248         WLAN_EID_RIC_DESCRIPTOR = 75,
1249
1250         WLAN_EID_DSE_REGISTERED_LOCATION = 58,
1251         WLAN_EID_SUPPORTED_REGULATORY_CLASSES = 59,
1252         WLAN_EID_EXT_CHANSWITCH_ANN = 60,
1253 };
1254
1255 /* Action category code */
1256 enum ieee80211_category {
1257         WLAN_CATEGORY_SPECTRUM_MGMT = 0,
1258         WLAN_CATEGORY_QOS = 1,
1259         WLAN_CATEGORY_DLS = 2,
1260         WLAN_CATEGORY_BACK = 3,
1261         WLAN_CATEGORY_PUBLIC = 4,
1262         WLAN_CATEGORY_HT = 7,
1263         WLAN_CATEGORY_SA_QUERY = 8,
1264         WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
1265         WLAN_CATEGORY_MESH_ACTION = 13,
1266         WLAN_CATEGORY_MULTIHOP_ACTION = 14,
1267         WLAN_CATEGORY_SELF_PROTECTED = 15,
1268         WLAN_CATEGORY_WMM = 17,
1269         /* TODO: remove MESH_PATH_SEL after mesh is updated
1270          * to current 802.11s draft  */
1271         WLAN_CATEGORY_MESH_PATH_SEL = 32,
1272         WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
1273         WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
1274 };
1275
1276 /* SPECTRUM_MGMT action code */
1277 enum ieee80211_spectrum_mgmt_actioncode {
1278         WLAN_ACTION_SPCT_MSR_REQ = 0,
1279         WLAN_ACTION_SPCT_MSR_RPRT = 1,
1280         WLAN_ACTION_SPCT_TPC_REQ = 2,
1281         WLAN_ACTION_SPCT_TPC_RPRT = 3,
1282         WLAN_ACTION_SPCT_CHL_SWITCH = 4,
1283 };
1284
1285 /* HT action codes */
1286 enum ieee80211_ht_actioncode {
1287         WLAN_HT_ACTION_NOTIFY_CHANWIDTH = 0,
1288         WLAN_HT_ACTION_SMPS = 1,
1289         WLAN_HT_ACTION_PSMP = 2,
1290         WLAN_HT_ACTION_PCO_PHASE = 3,
1291         WLAN_HT_ACTION_CSI = 4,
1292         WLAN_HT_ACTION_NONCOMPRESSED_BF = 5,
1293         WLAN_HT_ACTION_COMPRESSED_BF = 6,
1294         WLAN_HT_ACTION_ASEL_IDX_FEEDBACK = 7,
1295 };
1296
1297 /* Security key length */
1298 enum ieee80211_key_len {
1299         WLAN_KEY_LEN_WEP40 = 5,
1300         WLAN_KEY_LEN_WEP104 = 13,
1301         WLAN_KEY_LEN_CCMP = 16,
1302         WLAN_KEY_LEN_TKIP = 32,
1303         WLAN_KEY_LEN_AES_CMAC = 16,
1304 };
1305
1306 /**
1307  * enum - mesh path selection protocol identifier
1308  *
1309  * @IEEE80211_PATH_PROTOCOL_HWMP: the default path selection protocol
1310  * @IEEE80211_PATH_PROTOCOL_VENDOR: a vendor specific protocol that will
1311  * be specified in a vendor specific information element
1312  */
1313 enum {
1314         IEEE80211_PATH_PROTOCOL_HWMP = 0,
1315         IEEE80211_PATH_PROTOCOL_VENDOR = 255,
1316 };
1317
1318 /**
1319  * enum - mesh path selection metric identifier
1320  *
1321  * @IEEE80211_PATH_METRIC_AIRTIME: the default path selection metric
1322  * @IEEE80211_PATH_METRIC_VENDOR: a vendor specific metric that will be
1323  * specified in a vendor specific information element
1324  */
1325 enum {
1326         IEEE80211_PATH_METRIC_AIRTIME = 0,
1327         IEEE80211_PATH_METRIC_VENDOR = 255,
1328 };
1329
1330
1331 /*
1332  * IEEE 802.11-2007 7.3.2.9 Country information element
1333  *
1334  * Minimum length is 8 octets, ie len must be evenly
1335  * divisible by 2
1336  */
1337
1338 /* Although the spec says 8 I'm seeing 6 in practice */
1339 #define IEEE80211_COUNTRY_IE_MIN_LEN    6
1340
1341 /* The Country String field of the element shall be 3 octets in length */
1342 #define IEEE80211_COUNTRY_STRING_LEN    3
1343
1344 /*
1345  * For regulatory extension stuff see IEEE 802.11-2007
1346  * Annex I (page 1141) and Annex J (page 1147). Also
1347  * review 7.3.2.9.
1348  *
1349  * When dot11RegulatoryClassesRequired is true and the
1350  * first_channel/reg_extension_id is >= 201 then the IE
1351  * compromises of the 'ext' struct represented below:
1352  *
1353  *  - Regulatory extension ID - when generating IE this just needs
1354  *    to be monotonically increasing for each triplet passed in
1355  *    the IE
1356  *  - Regulatory class - index into set of rules
1357  *  - Coverage class - index into air propagation time (Table 7-27),
1358  *    in microseconds, you can compute the air propagation time from
1359  *    the index by multiplying by 3, so index 10 yields a propagation
1360  *    of 10 us. Valid values are 0-31, values 32-255 are not defined
1361  *    yet. A value of 0 inicates air propagation of <= 1 us.
1362  *
1363  *  See also Table I.2 for Emission limit sets and table
1364  *  I.3 for Behavior limit sets. Table J.1 indicates how to map
1365  *  a reg_class to an emission limit set and behavior limit set.
1366  */
1367 #define IEEE80211_COUNTRY_EXTENSION_ID 201
1368
1369 /*
1370  *  Channels numbers in the IE must be monotonically increasing
1371  *  if dot11RegulatoryClassesRequired is not true.
1372  *
1373  *  If dot11RegulatoryClassesRequired is true consecutive
1374  *  subband triplets following a regulatory triplet shall
1375  *  have monotonically increasing first_channel number fields.
1376  *
1377  *  Channel numbers shall not overlap.
1378  *
1379  *  Note that max_power is signed.
1380  */
1381 struct ieee80211_country_ie_triplet {
1382         union {
1383                 struct {
1384                         u8 first_channel;
1385                         u8 num_channels;
1386                         s8 max_power;
1387                 } __attribute__ ((packed)) chans;
1388                 struct {
1389                         u8 reg_extension_id;
1390                         u8 reg_class;
1391                         u8 coverage_class;
1392                 } __attribute__ ((packed)) ext;
1393         };
1394 } __attribute__ ((packed));
1395
1396 enum ieee80211_timeout_interval_type {
1397         WLAN_TIMEOUT_REASSOC_DEADLINE = 1 /* 802.11r */,
1398         WLAN_TIMEOUT_KEY_LIFETIME = 2 /* 802.11r */,
1399         WLAN_TIMEOUT_ASSOC_COMEBACK = 3 /* 802.11w */,
1400 };
1401
1402 /* BACK action code */
1403 enum ieee80211_back_actioncode {
1404         WLAN_ACTION_ADDBA_REQ = 0,
1405         WLAN_ACTION_ADDBA_RESP = 1,
1406         WLAN_ACTION_DELBA = 2,
1407 };
1408
1409 /* BACK (block-ack) parties */
1410 enum ieee80211_back_parties {
1411         WLAN_BACK_RECIPIENT = 0,
1412         WLAN_BACK_INITIATOR = 1,
1413 };
1414
1415 /* SA Query action */
1416 enum ieee80211_sa_query_action {
1417         WLAN_ACTION_SA_QUERY_REQUEST = 0,
1418         WLAN_ACTION_SA_QUERY_RESPONSE = 1,
1419 };
1420
1421
1422 /* A-MSDU 802.11n */
1423 #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
1424
1425 /* cipher suite selectors */
1426 #define WLAN_CIPHER_SUITE_USE_GROUP     0x000FAC00
1427 #define WLAN_CIPHER_SUITE_WEP40         0x000FAC01
1428 #define WLAN_CIPHER_SUITE_TKIP          0x000FAC02
1429 /* reserved:                            0x000FAC03 */
1430 #define WLAN_CIPHER_SUITE_CCMP          0x000FAC04
1431 #define WLAN_CIPHER_SUITE_WEP104        0x000FAC05
1432 #define WLAN_CIPHER_SUITE_AES_CMAC      0x000FAC06
1433
1434 /* AKM suite selectors */
1435 #define WLAN_AKM_SUITE_8021X            0x000FAC01
1436 #define WLAN_AKM_SUITE_PSK              0x000FAC02
1437 #define WLAN_AKM_SUITE_SAE                      0x000FAC08
1438 #define WLAN_AKM_SUITE_FT_OVER_SAE      0x000FAC09
1439
1440 #define WLAN_MAX_KEY_LEN                32
1441
1442 #define WLAN_PMKID_LEN                  16
1443
1444 /**
1445  * ieee80211_get_qos_ctl - get pointer to qos control bytes
1446  * @hdr: the frame
1447  *
1448  * The qos ctrl bytes come after the frame_control, duration, seq_num
1449  * and 3 or 4 addresses of length ETH_ALEN.
1450  * 3 addr: 2 + 2 + 2 + 3*6 = 24
1451  * 4 addr: 2 + 2 + 2 + 4*6 = 30
1452  */
1453 static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
1454 {
1455         if (ieee80211_has_a4(hdr->frame_control))
1456                 return (u8 *)hdr + 30;
1457         else
1458                 return (u8 *)hdr + 24;
1459 }
1460
1461 /**
1462  * ieee80211_get_SA - get pointer to SA
1463  * @hdr: the frame
1464  *
1465  * Given an 802.11 frame, this function returns the offset
1466  * to the source address (SA). It does not verify that the
1467  * header is long enough to contain the address, and the
1468  * header must be long enough to contain the frame control
1469  * field.
1470  */
1471 static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
1472 {
1473         if (ieee80211_has_a4(hdr->frame_control))
1474                 return hdr->addr4;
1475         if (ieee80211_has_fromds(hdr->frame_control))
1476                 return hdr->addr3;
1477         return hdr->addr2;
1478 }
1479
1480 /**
1481  * ieee80211_get_DA - get pointer to DA
1482  * @hdr: the frame
1483  *
1484  * Given an 802.11 frame, this function returns the offset
1485  * to the destination address (DA). It does not verify that
1486  * the header is long enough to contain the address, and the
1487  * header must be long enough to contain the frame control
1488  * field.
1489  */
1490 static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
1491 {
1492         if (ieee80211_has_tods(hdr->frame_control))
1493                 return hdr->addr3;
1494         else
1495                 return hdr->addr1;
1496 }
1497
1498 /**
1499  * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
1500  * @hdr: the frame (buffer must include at least the first octet of payload)
1501  */
1502 static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
1503 {
1504         if (ieee80211_is_disassoc(hdr->frame_control) ||
1505             ieee80211_is_deauth(hdr->frame_control))
1506                 return true;
1507
1508         if (ieee80211_is_action(hdr->frame_control)) {
1509                 u8 *category;
1510
1511                 /*
1512                  * Action frames, excluding Public Action frames, are Robust
1513                  * Management Frames. However, if we are looking at a Protected
1514                  * frame, skip the check since the data may be encrypted and
1515                  * the frame has already been found to be a Robust Management
1516                  * Frame (by the other end).
1517                  */
1518                 if (ieee80211_has_protected(hdr->frame_control))
1519                         return true;
1520                 category = ((u8 *) hdr) + 24;
1521                 return *category != WLAN_CATEGORY_PUBLIC &&
1522                         *category != WLAN_CATEGORY_HT &&
1523                         *category != WLAN_CATEGORY_SELF_PROTECTED &&
1524                         *category != WLAN_CATEGORY_VENDOR_SPECIFIC;
1525         }
1526
1527         return false;
1528 }
1529
1530 /**
1531  * ieee80211_fhss_chan_to_freq - get channel frequency
1532  * @channel: the FHSS channel
1533  *
1534  * Convert IEEE802.11 FHSS channel to frequency (MHz)
1535  * Ref IEEE 802.11-2007 section 14.6
1536  */
1537 static inline int ieee80211_fhss_chan_to_freq(int channel)
1538 {
1539         if ((channel > 1) && (channel < 96))
1540                 return channel + 2400;
1541         else
1542                 return -1;
1543 }
1544
1545 /**
1546  * ieee80211_freq_to_fhss_chan - get channel
1547  * @freq: the channels frequency
1548  *
1549  * Convert frequency (MHz) to IEEE802.11 FHSS channel
1550  * Ref IEEE 802.11-2007 section 14.6
1551  */
1552 static inline int ieee80211_freq_to_fhss_chan(int freq)
1553 {
1554         if ((freq > 2401) && (freq < 2496))
1555                 return freq - 2400;
1556         else
1557                 return -1;
1558 }
1559
1560 /**
1561  * ieee80211_dsss_chan_to_freq - get channel center frequency
1562  * @channel: the DSSS channel
1563  *
1564  * Convert IEEE802.11 DSSS channel to the center frequency (MHz).
1565  * Ref IEEE 802.11-2007 section 15.6
1566  */
1567 static inline int ieee80211_dsss_chan_to_freq(int channel)
1568 {
1569         if ((channel > 0) && (channel < 14))
1570                 return 2407 + (channel * 5);
1571         else if (channel == 14)
1572                 return 2484;
1573         else
1574                 return -1;
1575 }
1576
1577 /**
1578  * ieee80211_freq_to_dsss_chan - get channel
1579  * @freq: the frequency
1580  *
1581  * Convert frequency (MHz) to IEEE802.11 DSSS channel
1582  * Ref IEEE 802.11-2007 section 15.6
1583  *
1584  * This routine selects the channel with the closest center frequency.
1585  */
1586 static inline int ieee80211_freq_to_dsss_chan(int freq)
1587 {
1588         if ((freq >= 2410) && (freq < 2475))
1589                 return (freq - 2405) / 5;
1590         else if ((freq >= 2482) && (freq < 2487))
1591                 return 14;
1592         else
1593                 return -1;
1594 }
1595
1596 /* Convert IEEE802.11 HR DSSS channel to frequency (MHz) and back
1597  * Ref IEEE 802.11-2007 section 18.4.6.2
1598  *
1599  * The channels and frequencies are the same as those defined for DSSS
1600  */
1601 #define ieee80211_hr_chan_to_freq(chan) ieee80211_dsss_chan_to_freq(chan)
1602 #define ieee80211_freq_to_hr_chan(freq) ieee80211_freq_to_dsss_chan(freq)
1603
1604 /* Convert IEEE802.11 ERP channel to frequency (MHz) and back
1605  * Ref IEEE 802.11-2007 section 19.4.2
1606  */
1607 #define ieee80211_erp_chan_to_freq(chan) ieee80211_hr_chan_to_freq(chan)
1608 #define ieee80211_freq_to_erp_chan(freq) ieee80211_freq_to_hr_chan(freq)
1609
1610 /**
1611  * ieee80211_ofdm_chan_to_freq - get channel center frequency
1612  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1613  * @channel: the OFDM channel
1614  *
1615  * Convert IEEE802.11 OFDM channel to center frequency (MHz)
1616  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1617  */
1618 static inline int ieee80211_ofdm_chan_to_freq(int s_freq, int channel)
1619 {
1620         if ((channel > 0) && (channel <= 200) &&
1621             (s_freq >= 4000))
1622                 return s_freq + (channel * 5);
1623         else
1624                 return -1;
1625 }
1626
1627 /**
1628  * ieee80211_freq_to_ofdm_channel - get channel
1629  * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
1630  * @freq: the frequency
1631  *
1632  * Convert frequency (MHz) to IEEE802.11 OFDM channel
1633  * Ref IEEE 802.11-2007 section 17.3.8.3.2
1634  *
1635  * This routine selects the channel with the closest center frequency.
1636  */
1637 static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
1638 {
1639         if ((freq > (s_freq + 2)) && (freq <= (s_freq + 1202)) &&
1640             (s_freq >= 4000))
1641                 return (freq + 2 - s_freq) / 5;
1642         else
1643                 return -1;
1644 }
1645
1646 /**
1647  * ieee80211_tu_to_usec - convert time units (TU) to microseconds
1648  * @tu: the TUs
1649  */
1650 static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
1651 {
1652         return 1024 * tu;
1653 }
1654
1655 /**
1656  * ieee80211_check_tim - check if AID bit is set in TIM
1657  * @tim: the TIM IE
1658  * @tim_len: length of the TIM IE
1659  * @aid: the AID to look for
1660  */
1661 static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,
1662                                        u8 tim_len, u16 aid)
1663 {
1664         u8 mask;
1665         u8 index, indexn1, indexn2;
1666
1667         if (unlikely(!tim || tim_len < sizeof(*tim)))
1668                 return false;
1669
1670         aid &= 0x3fff;
1671         index = aid / 8;
1672         mask  = 1 << (aid & 7);
1673
1674         indexn1 = tim->bitmap_ctrl & 0xfe;
1675         indexn2 = tim_len + indexn1 - 4;
1676
1677         if (index < indexn1 || index > indexn2)
1678                 return false;
1679
1680         index -= indexn1;
1681
1682         return !!(tim->virtual_map[index] & mask);
1683 }
1684
1685 #endif /* LINUX_IEEE80211_H */