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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 */ | |
57 | #define IEEE80211_STYPE_PSPOLL 0x00A0 | |
58 | #define IEEE80211_STYPE_RTS 0x00B0 | |
59 | #define IEEE80211_STYPE_CTS 0x00C0 | |
60 | #define IEEE80211_STYPE_ACK 0x00D0 | |
61 | #define IEEE80211_STYPE_CFEND 0x00E0 | |
62 | #define IEEE80211_STYPE_CFENDACK 0x00F0 | |
63 | ||
64 | /* data */ | |
65 | #define IEEE80211_STYPE_DATA 0x0000 | |
66 | #define IEEE80211_STYPE_DATA_CFACK 0x0010 | |
67 | #define IEEE80211_STYPE_DATA_CFPOLL 0x0020 | |
68 | #define IEEE80211_STYPE_DATA_CFACKPOLL 0x0030 | |
69 | #define IEEE80211_STYPE_NULLFUNC 0x0040 | |
70 | #define IEEE80211_STYPE_CFACK 0x0050 | |
71 | #define IEEE80211_STYPE_CFPOLL 0x0060 | |
72 | #define IEEE80211_STYPE_CFACKPOLL 0x0070 | |
73 | #define IEEE80211_STYPE_QOS_DATA 0x0080 | |
74 | #define IEEE80211_STYPE_QOS_DATA_CFACK 0x0090 | |
75 | #define IEEE80211_STYPE_QOS_DATA_CFPOLL 0x00A0 | |
76 | #define IEEE80211_STYPE_QOS_DATA_CFACKPOLL 0x00B0 | |
77 | #define IEEE80211_STYPE_QOS_NULLFUNC 0x00C0 | |
78 | #define IEEE80211_STYPE_QOS_CFACK 0x00D0 | |
79 | #define IEEE80211_STYPE_QOS_CFPOLL 0x00E0 | |
80 | #define IEEE80211_STYPE_QOS_CFACKPOLL 0x00F0 | |
81 | ||
82 | ||
83 | /* miscellaneous IEEE 802.11 constants */ | |
84 | #define IEEE80211_MAX_FRAG_THRESHOLD 2346 | |
85 | #define IEEE80211_MAX_RTS_THRESHOLD 2347 | |
86 | #define IEEE80211_MAX_AID 2007 | |
87 | #define IEEE80211_MAX_TIM_LEN 251 | |
88 | #define IEEE80211_MAX_DATA_LEN 2304 | |
89 | /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section | |
90 | 6.2.1.1.2. | |
91 | ||
92 | The figure in section 7.1.2 suggests a body size of up to 2312 | |
93 | bytes is allowed, which is a bit confusing, I suspect this | |
94 | represents the 2304 bytes of real data, plus a possible 8 bytes of | |
95 | WEP IV and ICV. (this interpretation suggested by Ramiro Barreiro) */ | |
96 | ||
97 | #define IEEE80211_MAX_SSID_LEN 32 | |
98 | ||
99 | struct ieee80211_hdr { | |
100 | __le16 frame_control; | |
101 | __le16 duration_id; | |
102 | u8 addr1[6]; | |
103 | u8 addr2[6]; | |
104 | u8 addr3[6]; | |
105 | __le16 seq_ctrl; | |
106 | u8 addr4[6]; | |
107 | } __attribute__ ((packed)); | |
108 | ||
109 | ||
110 | struct ieee80211_mgmt { | |
111 | __le16 frame_control; | |
112 | __le16 duration; | |
113 | u8 da[6]; | |
114 | u8 sa[6]; | |
115 | u8 bssid[6]; | |
116 | __le16 seq_ctrl; | |
117 | union { | |
118 | struct { | |
119 | __le16 auth_alg; | |
120 | __le16 auth_transaction; | |
121 | __le16 status_code; | |
122 | /* possibly followed by Challenge text */ | |
123 | u8 variable[0]; | |
124 | } __attribute__ ((packed)) auth; | |
125 | struct { | |
126 | __le16 reason_code; | |
127 | } __attribute__ ((packed)) deauth; | |
128 | struct { | |
129 | __le16 capab_info; | |
130 | __le16 listen_interval; | |
131 | /* followed by SSID and Supported rates */ | |
132 | u8 variable[0]; | |
133 | } __attribute__ ((packed)) assoc_req; | |
134 | struct { | |
135 | __le16 capab_info; | |
136 | __le16 status_code; | |
137 | __le16 aid; | |
138 | /* followed by Supported rates */ | |
139 | u8 variable[0]; | |
140 | } __attribute__ ((packed)) assoc_resp, reassoc_resp; | |
141 | struct { | |
142 | __le16 capab_info; | |
143 | __le16 listen_interval; | |
144 | u8 current_ap[6]; | |
145 | /* followed by SSID and Supported rates */ | |
146 | u8 variable[0]; | |
147 | } __attribute__ ((packed)) reassoc_req; | |
148 | struct { | |
149 | __le16 reason_code; | |
150 | } __attribute__ ((packed)) disassoc; | |
151 | struct { | |
152 | __le64 timestamp; | |
153 | __le16 beacon_int; | |
154 | __le16 capab_info; | |
155 | /* followed by some of SSID, Supported rates, | |
156 | * FH Params, DS Params, CF Params, IBSS Params, TIM */ | |
157 | u8 variable[0]; | |
158 | } __attribute__ ((packed)) beacon; | |
159 | struct { | |
160 | /* only variable items: SSID, Supported rates */ | |
161 | u8 variable[0]; | |
162 | } __attribute__ ((packed)) probe_req; | |
163 | struct { | |
164 | __le64 timestamp; | |
165 | __le16 beacon_int; | |
166 | __le16 capab_info; | |
167 | /* followed by some of SSID, Supported rates, | |
168 | * FH Params, DS Params, CF Params, IBSS Params */ | |
169 | u8 variable[0]; | |
170 | } __attribute__ ((packed)) probe_resp; | |
171 | struct { | |
172 | u8 category; | |
173 | union { | |
174 | struct { | |
175 | u8 action_code; | |
176 | u8 dialog_token; | |
177 | u8 status_code; | |
178 | u8 variable[0]; | |
179 | } __attribute__ ((packed)) wme_action; | |
180 | struct{ | |
181 | u8 action_code; | |
182 | u8 element_id; | |
183 | u8 length; | |
184 | u8 switch_mode; | |
185 | u8 new_chan; | |
186 | u8 switch_count; | |
187 | } __attribute__((packed)) chan_switch; | |
188 | } u; | |
189 | } __attribute__ ((packed)) action; | |
190 | } u; | |
191 | } __attribute__ ((packed)); | |
192 | ||
193 | ||
194 | /* Control frames */ | |
195 | struct ieee80211_rts { | |
196 | __le16 frame_control; | |
197 | __le16 duration; | |
198 | u8 ra[6]; | |
199 | u8 ta[6]; | |
200 | } __attribute__ ((packed)); | |
201 | ||
202 | struct ieee80211_cts { | |
203 | __le16 frame_control; | |
204 | __le16 duration; | |
205 | u8 ra[6]; | |
206 | } __attribute__ ((packed)); | |
207 | ||
208 | ||
209 | /* Authentication algorithms */ | |
210 | #define WLAN_AUTH_OPEN 0 | |
211 | #define WLAN_AUTH_SHARED_KEY 1 | |
212 | #define WLAN_AUTH_FAST_BSS_TRANSITION 2 | |
213 | #define WLAN_AUTH_LEAP 128 | |
214 | ||
215 | #define WLAN_AUTH_CHALLENGE_LEN 128 | |
216 | ||
217 | #define WLAN_CAPABILITY_ESS (1<<0) | |
218 | #define WLAN_CAPABILITY_IBSS (1<<1) | |
219 | #define WLAN_CAPABILITY_CF_POLLABLE (1<<2) | |
220 | #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3) | |
221 | #define WLAN_CAPABILITY_PRIVACY (1<<4) | |
222 | #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5) | |
223 | #define WLAN_CAPABILITY_PBCC (1<<6) | |
224 | #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7) | |
225 | /* 802.11h */ | |
226 | #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8) | |
227 | #define WLAN_CAPABILITY_QOS (1<<9) | |
228 | #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10) | |
229 | #define WLAN_CAPABILITY_DSSS_OFDM (1<<13) | |
230 | ||
5628221c DD |
231 | /* 802.11g ERP information element */ |
232 | #define WLAN_ERP_NON_ERP_PRESENT (1<<0) | |
233 | #define WLAN_ERP_USE_PROTECTION (1<<1) | |
234 | #define WLAN_ERP_BARKER_PREAMBLE (1<<2) | |
235 | ||
236 | /* WLAN_ERP_BARKER_PREAMBLE values */ | |
237 | enum { | |
238 | WLAN_ERP_PREAMBLE_SHORT = 0, | |
239 | WLAN_ERP_PREAMBLE_LONG = 1, | |
240 | }; | |
241 | ||
a9de8ce0 JB |
242 | /* Status codes */ |
243 | enum ieee80211_statuscode { | |
244 | WLAN_STATUS_SUCCESS = 0, | |
245 | WLAN_STATUS_UNSPECIFIED_FAILURE = 1, | |
246 | WLAN_STATUS_CAPS_UNSUPPORTED = 10, | |
247 | WLAN_STATUS_REASSOC_NO_ASSOC = 11, | |
248 | WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12, | |
249 | WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13, | |
250 | WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14, | |
251 | WLAN_STATUS_CHALLENGE_FAIL = 15, | |
252 | WLAN_STATUS_AUTH_TIMEOUT = 16, | |
253 | WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17, | |
254 | WLAN_STATUS_ASSOC_DENIED_RATES = 18, | |
255 | /* 802.11b */ | |
256 | WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19, | |
257 | WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20, | |
258 | WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21, | |
259 | /* 802.11h */ | |
260 | WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22, | |
261 | WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23, | |
262 | WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24, | |
263 | /* 802.11g */ | |
264 | WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25, | |
265 | WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26, | |
266 | /* 802.11i */ | |
267 | WLAN_STATUS_INVALID_IE = 40, | |
268 | WLAN_STATUS_INVALID_GROUP_CIPHER = 41, | |
269 | WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42, | |
270 | WLAN_STATUS_INVALID_AKMP = 43, | |
271 | WLAN_STATUS_UNSUPP_RSN_VERSION = 44, | |
272 | WLAN_STATUS_INVALID_RSN_IE_CAP = 45, | |
273 | WLAN_STATUS_CIPHER_SUITE_REJECTED = 46, | |
274 | }; | |
275 | ||
276 | ||
277 | /* Reason codes */ | |
278 | enum ieee80211_reasoncode { | |
279 | WLAN_REASON_UNSPECIFIED = 1, | |
280 | WLAN_REASON_PREV_AUTH_NOT_VALID = 2, | |
281 | WLAN_REASON_DEAUTH_LEAVING = 3, | |
282 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4, | |
283 | WLAN_REASON_DISASSOC_AP_BUSY = 5, | |
284 | WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6, | |
285 | WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7, | |
286 | WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8, | |
287 | WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9, | |
288 | /* 802.11h */ | |
289 | WLAN_REASON_DISASSOC_BAD_POWER = 10, | |
290 | WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11, | |
291 | /* 802.11i */ | |
292 | WLAN_REASON_INVALID_IE = 13, | |
293 | WLAN_REASON_MIC_FAILURE = 14, | |
294 | WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15, | |
295 | WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16, | |
296 | WLAN_REASON_IE_DIFFERENT = 17, | |
297 | WLAN_REASON_INVALID_GROUP_CIPHER = 18, | |
298 | WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19, | |
299 | WLAN_REASON_INVALID_AKMP = 20, | |
300 | WLAN_REASON_UNSUPP_RSN_VERSION = 21, | |
301 | WLAN_REASON_INVALID_RSN_IE_CAP = 22, | |
302 | WLAN_REASON_IEEE8021X_FAILED = 23, | |
303 | WLAN_REASON_CIPHER_SUITE_REJECTED = 24, | |
304 | }; | |
305 | ||
306 | ||
307 | /* Information Element IDs */ | |
308 | enum ieee80211_eid { | |
309 | WLAN_EID_SSID = 0, | |
310 | WLAN_EID_SUPP_RATES = 1, | |
311 | WLAN_EID_FH_PARAMS = 2, | |
312 | WLAN_EID_DS_PARAMS = 3, | |
313 | WLAN_EID_CF_PARAMS = 4, | |
314 | WLAN_EID_TIM = 5, | |
315 | WLAN_EID_IBSS_PARAMS = 6, | |
316 | WLAN_EID_CHALLENGE = 16, | |
317 | /* 802.11d */ | |
318 | WLAN_EID_COUNTRY = 7, | |
319 | WLAN_EID_HP_PARAMS = 8, | |
320 | WLAN_EID_HP_TABLE = 9, | |
321 | WLAN_EID_REQUEST = 10, | |
322 | /* 802.11h */ | |
323 | WLAN_EID_PWR_CONSTRAINT = 32, | |
324 | WLAN_EID_PWR_CAPABILITY = 33, | |
325 | WLAN_EID_TPC_REQUEST = 34, | |
326 | WLAN_EID_TPC_REPORT = 35, | |
327 | WLAN_EID_SUPPORTED_CHANNELS = 36, | |
328 | WLAN_EID_CHANNEL_SWITCH = 37, | |
329 | WLAN_EID_MEASURE_REQUEST = 38, | |
330 | WLAN_EID_MEASURE_REPORT = 39, | |
331 | WLAN_EID_QUIET = 40, | |
332 | WLAN_EID_IBSS_DFS = 41, | |
333 | /* 802.11g */ | |
334 | WLAN_EID_ERP_INFO = 42, | |
335 | WLAN_EID_EXT_SUPP_RATES = 50, | |
336 | /* 802.11i */ | |
337 | WLAN_EID_RSN = 48, | |
338 | WLAN_EID_WPA = 221, | |
339 | WLAN_EID_GENERIC = 221, | |
340 | WLAN_EID_VENDOR_SPECIFIC = 221, | |
341 | WLAN_EID_QOS_PARAMETER = 222 | |
342 | }; | |
343 | ||
344 | /* cipher suite selectors */ | |
345 | #define WLAN_CIPHER_SUITE_USE_GROUP 0x000FAC00 | |
346 | #define WLAN_CIPHER_SUITE_WEP40 0x000FAC01 | |
347 | #define WLAN_CIPHER_SUITE_TKIP 0x000FAC02 | |
348 | /* reserved: 0x000FAC03 */ | |
349 | #define WLAN_CIPHER_SUITE_CCMP 0x000FAC04 | |
350 | #define WLAN_CIPHER_SUITE_WEP104 0x000FAC05 | |
351 | ||
352 | #define WLAN_MAX_KEY_LEN 32 | |
353 | ||
f97df02e JB |
354 | /** |
355 | * ieee80211_get_SA - get pointer to SA | |
356 | * | |
357 | * Given an 802.11 frame, this function returns the offset | |
358 | * to the source address (SA). It does not verify that the | |
359 | * header is long enough to contain the address, and the | |
360 | * header must be long enough to contain the frame control | |
361 | * field. | |
362 | * | |
363 | * @hdr: the frame | |
364 | */ | |
365 | static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) | |
366 | { | |
367 | u8 *raw = (u8 *) hdr; | |
368 | u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */ | |
369 | ||
370 | switch (tofrom) { | |
371 | case 2: | |
372 | return hdr->addr3; | |
373 | case 3: | |
374 | return hdr->addr4; | |
375 | } | |
376 | return hdr->addr2; | |
377 | } | |
378 | ||
379 | /** | |
380 | * ieee80211_get_DA - get pointer to DA | |
381 | * | |
382 | * Given an 802.11 frame, this function returns the offset | |
383 | * to the destination address (DA). It does not verify that | |
384 | * the header is long enough to contain the address, and the | |
385 | * header must be long enough to contain the frame control | |
386 | * field. | |
387 | * | |
388 | * @hdr: the frame | |
389 | */ | |
390 | static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) | |
391 | { | |
392 | u8 *raw = (u8 *) hdr; | |
393 | u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */ | |
394 | ||
395 | if (to_ds) | |
396 | return hdr->addr3; | |
397 | return hdr->addr1; | |
398 | } | |
399 | ||
400 | /** | |
401 | * ieee80211_get_morefrag - determine whether the MOREFRAGS bit is set | |
402 | * | |
403 | * This function determines whether the "more fragments" bit is set | |
404 | * in the frame. | |
405 | * | |
406 | * @hdr: the frame | |
407 | */ | |
408 | static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr) | |
409 | { | |
410 | return (le16_to_cpu(hdr->frame_control) & | |
411 | IEEE80211_FCTL_MOREFRAGS) != 0; | |
412 | } | |
413 | ||
a9de8ce0 | 414 | #endif /* IEEE80211_H */ |