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Jiri Benca9de8ce2007-05-05 11:43:04 -07001/*
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>
Johannes Bergf97df022007-09-18 17:29:20 -040019#include <asm/byteorder.h>
Jiri Benca9de8ce2007-05-05 11:43:04 -070020
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 */
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +020057#define IEEE80211_STYPE_BACK_REQ 0x0080
58#define IEEE80211_STYPE_BACK 0x0090
Jiri Benca9de8ce2007-05-05 11:43:04 -070059#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 */
Michael Wuc2378992007-10-30 16:50:05 -040086#define IEEE80211_MAX_FRAG_THRESHOLD 2352
87#define IEEE80211_MAX_RTS_THRESHOLD 2353
Jiri Benca9de8ce2007-05-05 11:43:04 -070088#define IEEE80211_MAX_AID 2007
89#define IEEE80211_MAX_TIM_LEN 251
Jiri Benca9de8ce2007-05-05 11:43:04 -070090/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
91 6.2.1.1.2.
92
Michael Wuc2378992007-10-30 16:50:05 -040093 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
Jiri Benca9de8ce2007-05-05 11:43:04 -070098
99#define IEEE80211_MAX_SSID_LEN 32
100
101struct ieee80211_hdr {
102 __le16 frame_control;
103 __le16 duration_id;
104 u8 addr1[6];
105 u8 addr2[6];
106 u8 addr3[6];
107 __le16 seq_ctrl;
108 u8 addr4[6];
109} __attribute__ ((packed));
110
111
112struct ieee80211_mgmt {
113 __le16 frame_control;
114 __le16 duration;
115 u8 da[6];
116 u8 sa[6];
117 u8 bssid[6];
118 __le16 seq_ctrl;
119 union {
120 struct {
121 __le16 auth_alg;
122 __le16 auth_transaction;
123 __le16 status_code;
124 /* possibly followed by Challenge text */
125 u8 variable[0];
126 } __attribute__ ((packed)) auth;
127 struct {
128 __le16 reason_code;
129 } __attribute__ ((packed)) deauth;
130 struct {
131 __le16 capab_info;
132 __le16 listen_interval;
133 /* followed by SSID and Supported rates */
134 u8 variable[0];
135 } __attribute__ ((packed)) assoc_req;
136 struct {
137 __le16 capab_info;
138 __le16 status_code;
139 __le16 aid;
140 /* followed by Supported rates */
141 u8 variable[0];
142 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
143 struct {
144 __le16 capab_info;
145 __le16 listen_interval;
146 u8 current_ap[6];
147 /* followed by SSID and Supported rates */
148 u8 variable[0];
149 } __attribute__ ((packed)) reassoc_req;
150 struct {
151 __le16 reason_code;
152 } __attribute__ ((packed)) disassoc;
153 struct {
154 __le64 timestamp;
155 __le16 beacon_int;
156 __le16 capab_info;
157 /* followed by some of SSID, Supported rates,
158 * FH Params, DS Params, CF Params, IBSS Params, TIM */
159 u8 variable[0];
160 } __attribute__ ((packed)) beacon;
161 struct {
162 /* only variable items: SSID, Supported rates */
163 u8 variable[0];
164 } __attribute__ ((packed)) probe_req;
165 struct {
166 __le64 timestamp;
167 __le16 beacon_int;
168 __le16 capab_info;
169 /* followed by some of SSID, Supported rates,
170 * FH Params, DS Params, CF Params, IBSS Params */
171 u8 variable[0];
172 } __attribute__ ((packed)) probe_resp;
173 struct {
174 u8 category;
175 union {
176 struct {
177 u8 action_code;
178 u8 dialog_token;
179 u8 status_code;
180 u8 variable[0];
181 } __attribute__ ((packed)) wme_action;
182 struct{
183 u8 action_code;
184 u8 element_id;
185 u8 length;
186 u8 switch_mode;
187 u8 new_chan;
188 u8 switch_count;
189 } __attribute__((packed)) chan_switch;
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200190 struct{
191 u8 action_code;
192 u8 dialog_token;
193 __le16 capab;
194 __le16 timeout;
195 __le16 start_seq_num;
196 } __attribute__((packed)) addba_req;
197 struct{
198 u8 action_code;
199 u8 dialog_token;
200 __le16 status;
201 __le16 capab;
202 __le16 timeout;
203 } __attribute__((packed)) addba_resp;
204 struct{
205 u8 action_code;
206 __le16 params;
207 __le16 reason_code;
208 } __attribute__((packed)) delba;
Jiri Benca9de8ce2007-05-05 11:43:04 -0700209 } u;
210 } __attribute__ ((packed)) action;
211 } u;
212} __attribute__ ((packed));
213
214
215/* Control frames */
216struct ieee80211_rts {
217 __le16 frame_control;
218 __le16 duration;
219 u8 ra[6];
220 u8 ta[6];
221} __attribute__ ((packed));
222
223struct ieee80211_cts {
224 __le16 frame_control;
225 __le16 duration;
226 u8 ra[6];
227} __attribute__ ((packed));
228
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200229/**
230 * struct ieee80211_bar - HT Block Ack Request
231 *
232 * This structure refers to "HT BlockAckReq" as
233 * described in 802.11n draft section 7.2.1.7.1
234 */
235struct ieee80211_bar {
236 __le16 frame_control;
237 __le16 duration;
238 __u8 ra[6];
239 __u8 ta[6];
Ron Rindjunskya8b47ea2008-01-21 12:39:11 +0200240 __le16 control;
241 __le16 start_seq_num;
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200242} __attribute__((packed));
243
244/**
245 * struct ieee80211_ht_cap - HT capabilities
246 *
247 * This structure refers to "HT capabilities element" as
248 * described in 802.11n draft section 7.3.2.52
249 */
250struct ieee80211_ht_cap {
251 __le16 cap_info;
252 u8 ampdu_params_info;
253 u8 supp_mcs_set[16];
254 __le16 extended_ht_cap_info;
255 __le32 tx_BF_cap_info;
256 u8 antenna_selection_info;
257} __attribute__ ((packed));
258
259/**
260 * struct ieee80211_ht_cap - HT additional information
261 *
262 * This structure refers to "HT information element" as
263 * described in 802.11n draft section 7.3.2.53
264 */
265struct ieee80211_ht_addt_info {
266 u8 control_chan;
267 u8 ht_param;
268 __le16 operation_mode;
269 __le16 stbc_param;
270 u8 basic_set[16];
271} __attribute__ ((packed));
272
273/* 802.11n HT capabilities masks */
274#define IEEE80211_HT_CAP_SUP_WIDTH 0x0002
275#define IEEE80211_HT_CAP_MIMO_PS 0x000C
276#define IEEE80211_HT_CAP_GRN_FLD 0x0010
277#define IEEE80211_HT_CAP_SGI_20 0x0020
278#define IEEE80211_HT_CAP_SGI_40 0x0040
279#define IEEE80211_HT_CAP_DELAY_BA 0x0400
280#define IEEE80211_HT_CAP_MAX_AMSDU 0x0800
281#define IEEE80211_HT_CAP_AMPDU_FACTOR 0x03
282#define IEEE80211_HT_CAP_AMPDU_DENSITY 0x1C
283/* 802.11n HT IE masks */
284#define IEEE80211_HT_IE_CHA_SEC_OFFSET 0x03
285#define IEEE80211_HT_IE_CHA_WIDTH 0x04
286#define IEEE80211_HT_IE_HT_PROTECTION 0x0003
287#define IEEE80211_HT_IE_NON_GF_STA_PRSNT 0x0004
288#define IEEE80211_HT_IE_NON_HT_STA_PRSNT 0x0010
Jiri Benca9de8ce2007-05-05 11:43:04 -0700289
Tomas Winklere53cfe02008-01-30 22:05:13 -0800290/* MIMO Power Save Modes */
291#define WLAN_HT_CAP_MIMO_PS_STATIC 0
292#define WLAN_HT_CAP_MIMO_PS_DYNAMIC 1
293#define WLAN_HT_CAP_MIMO_PS_INVALID 2
294#define WLAN_HT_CAP_MIMO_PS_DISABLED 3
295
Jiri Benca9de8ce2007-05-05 11:43:04 -0700296/* Authentication algorithms */
297#define WLAN_AUTH_OPEN 0
298#define WLAN_AUTH_SHARED_KEY 1
299#define WLAN_AUTH_FAST_BSS_TRANSITION 2
300#define WLAN_AUTH_LEAP 128
301
302#define WLAN_AUTH_CHALLENGE_LEN 128
303
304#define WLAN_CAPABILITY_ESS (1<<0)
305#define WLAN_CAPABILITY_IBSS (1<<1)
306#define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
307#define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
308#define WLAN_CAPABILITY_PRIVACY (1<<4)
309#define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
310#define WLAN_CAPABILITY_PBCC (1<<6)
311#define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
312/* 802.11h */
313#define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
314#define WLAN_CAPABILITY_QOS (1<<9)
315#define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
316#define WLAN_CAPABILITY_DSSS_OFDM (1<<13)
317
Daniel Drake56282212007-07-10 19:32:10 +0200318/* 802.11g ERP information element */
319#define WLAN_ERP_NON_ERP_PRESENT (1<<0)
320#define WLAN_ERP_USE_PROTECTION (1<<1)
321#define WLAN_ERP_BARKER_PREAMBLE (1<<2)
322
323/* WLAN_ERP_BARKER_PREAMBLE values */
324enum {
325 WLAN_ERP_PREAMBLE_SHORT = 0,
326 WLAN_ERP_PREAMBLE_LONG = 1,
327};
328
Jiri Benca9de8ce2007-05-05 11:43:04 -0700329/* Status codes */
330enum ieee80211_statuscode {
331 WLAN_STATUS_SUCCESS = 0,
332 WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
333 WLAN_STATUS_CAPS_UNSUPPORTED = 10,
334 WLAN_STATUS_REASSOC_NO_ASSOC = 11,
335 WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
336 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
337 WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
338 WLAN_STATUS_CHALLENGE_FAIL = 15,
339 WLAN_STATUS_AUTH_TIMEOUT = 16,
340 WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
341 WLAN_STATUS_ASSOC_DENIED_RATES = 18,
342 /* 802.11b */
343 WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
344 WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
345 WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
346 /* 802.11h */
347 WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
348 WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
349 WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
350 /* 802.11g */
351 WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
352 WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
353 /* 802.11i */
354 WLAN_STATUS_INVALID_IE = 40,
355 WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
356 WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
357 WLAN_STATUS_INVALID_AKMP = 43,
358 WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
359 WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
360 WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200361 /* 802.11e */
362 WLAN_STATUS_UNSPECIFIED_QOS = 32,
363 WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
364 WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
365 WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
366 WLAN_STATUS_REQUEST_DECLINED = 37,
367 WLAN_STATUS_INVALID_QOS_PARAM = 38,
368 WLAN_STATUS_CHANGE_TSPEC = 39,
369 WLAN_STATUS_WAIT_TS_DELAY = 47,
370 WLAN_STATUS_NO_DIRECT_LINK = 48,
371 WLAN_STATUS_STA_NOT_PRESENT = 49,
372 WLAN_STATUS_STA_NOT_QSTA = 50,
Jiri Benca9de8ce2007-05-05 11:43:04 -0700373};
374
375
376/* Reason codes */
377enum ieee80211_reasoncode {
378 WLAN_REASON_UNSPECIFIED = 1,
379 WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
380 WLAN_REASON_DEAUTH_LEAVING = 3,
381 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
382 WLAN_REASON_DISASSOC_AP_BUSY = 5,
383 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
384 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
385 WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
386 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
387 /* 802.11h */
388 WLAN_REASON_DISASSOC_BAD_POWER = 10,
389 WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
390 /* 802.11i */
391 WLAN_REASON_INVALID_IE = 13,
392 WLAN_REASON_MIC_FAILURE = 14,
393 WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
394 WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
395 WLAN_REASON_IE_DIFFERENT = 17,
396 WLAN_REASON_INVALID_GROUP_CIPHER = 18,
397 WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
398 WLAN_REASON_INVALID_AKMP = 20,
399 WLAN_REASON_UNSUPP_RSN_VERSION = 21,
400 WLAN_REASON_INVALID_RSN_IE_CAP = 22,
401 WLAN_REASON_IEEE8021X_FAILED = 23,
402 WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200403 /* 802.11e */
404 WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
405 WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
406 WLAN_REASON_DISASSOC_LOW_ACK = 34,
407 WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
408 WLAN_REASON_QSTA_LEAVE_QBSS = 36,
409 WLAN_REASON_QSTA_NOT_USE = 37,
410 WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
411 WLAN_REASON_QSTA_TIMEOUT = 39,
412 WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
Jiri Benca9de8ce2007-05-05 11:43:04 -0700413};
414
415
416/* Information Element IDs */
417enum ieee80211_eid {
418 WLAN_EID_SSID = 0,
419 WLAN_EID_SUPP_RATES = 1,
420 WLAN_EID_FH_PARAMS = 2,
421 WLAN_EID_DS_PARAMS = 3,
422 WLAN_EID_CF_PARAMS = 4,
423 WLAN_EID_TIM = 5,
424 WLAN_EID_IBSS_PARAMS = 6,
425 WLAN_EID_CHALLENGE = 16,
426 /* 802.11d */
427 WLAN_EID_COUNTRY = 7,
428 WLAN_EID_HP_PARAMS = 8,
429 WLAN_EID_HP_TABLE = 9,
430 WLAN_EID_REQUEST = 10,
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200431 /* 802.11e */
432 WLAN_EID_QBSS_LOAD = 11,
433 WLAN_EID_EDCA_PARAM_SET = 12,
434 WLAN_EID_TSPEC = 13,
435 WLAN_EID_TCLAS = 14,
436 WLAN_EID_SCHEDULE = 15,
437 WLAN_EID_TS_DELAY = 43,
438 WLAN_EID_TCLAS_PROCESSING = 44,
439 WLAN_EID_QOS_CAPA = 46,
Jiri Benca9de8ce2007-05-05 11:43:04 -0700440 /* 802.11h */
441 WLAN_EID_PWR_CONSTRAINT = 32,
442 WLAN_EID_PWR_CAPABILITY = 33,
443 WLAN_EID_TPC_REQUEST = 34,
444 WLAN_EID_TPC_REPORT = 35,
445 WLAN_EID_SUPPORTED_CHANNELS = 36,
446 WLAN_EID_CHANNEL_SWITCH = 37,
447 WLAN_EID_MEASURE_REQUEST = 38,
448 WLAN_EID_MEASURE_REPORT = 39,
449 WLAN_EID_QUIET = 40,
450 WLAN_EID_IBSS_DFS = 41,
451 /* 802.11g */
452 WLAN_EID_ERP_INFO = 42,
453 WLAN_EID_EXT_SUPP_RATES = 50,
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200454 /* 802.11n */
455 WLAN_EID_HT_CAPABILITY = 45,
456 WLAN_EID_HT_EXTRA_INFO = 61,
Jiri Benca9de8ce2007-05-05 11:43:04 -0700457 /* 802.11i */
458 WLAN_EID_RSN = 48,
459 WLAN_EID_WPA = 221,
460 WLAN_EID_GENERIC = 221,
461 WLAN_EID_VENDOR_SPECIFIC = 221,
462 WLAN_EID_QOS_PARAMETER = 222
463};
464
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200465/* Action category code */
466enum ieee80211_category {
467 WLAN_CATEGORY_SPECTRUM_MGMT = 0,
468 WLAN_CATEGORY_QOS = 1,
469 WLAN_CATEGORY_DLS = 2,
470 WLAN_CATEGORY_BACK = 3,
471 WLAN_CATEGORY_WMM = 17,
472};
473
474/* BACK action code */
475enum ieee80211_back_actioncode {
476 WLAN_ACTION_ADDBA_REQ = 0,
477 WLAN_ACTION_ADDBA_RESP = 1,
478 WLAN_ACTION_DELBA = 2,
479};
480
Ron Rindjunsky07db2182007-12-25 17:00:33 +0200481/* BACK (block-ack) parties */
482enum ieee80211_back_parties {
483 WLAN_BACK_RECIPIENT = 0,
484 WLAN_BACK_INITIATOR = 1,
485 WLAN_BACK_TIMER = 2,
486};
487
Ron Rindjunsky6b4e3242007-11-14 19:57:38 +0200488/* A-MSDU 802.11n */
489#define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
490
Jiri Benca9de8ce2007-05-05 11:43:04 -0700491/* cipher suite selectors */
492#define WLAN_CIPHER_SUITE_USE_GROUP 0x000FAC00
493#define WLAN_CIPHER_SUITE_WEP40 0x000FAC01
494#define WLAN_CIPHER_SUITE_TKIP 0x000FAC02
495/* reserved: 0x000FAC03 */
496#define WLAN_CIPHER_SUITE_CCMP 0x000FAC04
497#define WLAN_CIPHER_SUITE_WEP104 0x000FAC05
498
499#define WLAN_MAX_KEY_LEN 32
500
Johannes Bergf97df022007-09-18 17:29:20 -0400501/**
502 * ieee80211_get_SA - get pointer to SA
503 *
504 * Given an 802.11 frame, this function returns the offset
505 * to the source address (SA). It does not verify that the
506 * header is long enough to contain the address, and the
507 * header must be long enough to contain the frame control
508 * field.
509 *
510 * @hdr: the frame
511 */
512static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
513{
514 u8 *raw = (u8 *) hdr;
515 u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */
516
517 switch (tofrom) {
518 case 2:
519 return hdr->addr3;
520 case 3:
521 return hdr->addr4;
522 }
523 return hdr->addr2;
524}
525
526/**
527 * ieee80211_get_DA - get pointer to DA
528 *
529 * Given an 802.11 frame, this function returns the offset
530 * to the destination address (DA). It does not verify that
531 * the header is long enough to contain the address, and the
532 * header must be long enough to contain the frame control
533 * field.
534 *
535 * @hdr: the frame
536 */
537static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
538{
539 u8 *raw = (u8 *) hdr;
540 u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */
541
542 if (to_ds)
543 return hdr->addr3;
544 return hdr->addr1;
545}
546
547/**
548 * ieee80211_get_morefrag - determine whether the MOREFRAGS bit is set
549 *
550 * This function determines whether the "more fragments" bit is set
551 * in the frame.
552 *
553 * @hdr: the frame
554 */
555static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr)
556{
557 return (le16_to_cpu(hdr->frame_control) &
558 IEEE80211_FCTL_MOREFRAGS) != 0;
559}
560
Jiri Benca9de8ce2007-05-05 11:43:04 -0700561#endif /* IEEE80211_H */