tjh.dev
Linux kernel mirror (for testing)
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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>
19#include <asm/byteorder.h>
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_BACK_REQ 0x0080
58#define IEEE80211_STYPE_BACK 0x0090
59#define IEEE80211_STYPE_PSPOLL 0x00A0
60#define IEEE80211_STYPE_RTS 0x00B0
61#define IEEE80211_STYPE_CTS 0x00C0
62#define IEEE80211_STYPE_ACK 0x00D0
63#define IEEE80211_STYPE_CFEND 0x00E0
64#define IEEE80211_STYPE_CFENDACK 0x00F0
65
66/* data */
67#define IEEE80211_STYPE_DATA 0x0000
68#define IEEE80211_STYPE_DATA_CFACK 0x0010
69#define IEEE80211_STYPE_DATA_CFPOLL 0x0020
70#define IEEE80211_STYPE_DATA_CFACKPOLL 0x0030
71#define IEEE80211_STYPE_NULLFUNC 0x0040
72#define IEEE80211_STYPE_CFACK 0x0050
73#define IEEE80211_STYPE_CFPOLL 0x0060
74#define IEEE80211_STYPE_CFACKPOLL 0x0070
75#define IEEE80211_STYPE_QOS_DATA 0x0080
76#define IEEE80211_STYPE_QOS_DATA_CFACK 0x0090
77#define IEEE80211_STYPE_QOS_DATA_CFPOLL 0x00A0
78#define IEEE80211_STYPE_QOS_DATA_CFACKPOLL 0x00B0
79#define IEEE80211_STYPE_QOS_NULLFUNC 0x00C0
80#define IEEE80211_STYPE_QOS_CFACK 0x00D0
81#define IEEE80211_STYPE_QOS_CFPOLL 0x00E0
82#define IEEE80211_STYPE_QOS_CFACKPOLL 0x00F0
83
84
85/* miscellaneous IEEE 802.11 constants */
86#define IEEE80211_MAX_FRAG_THRESHOLD 2352
87#define IEEE80211_MAX_RTS_THRESHOLD 2353
88#define IEEE80211_MAX_AID 2007
89#define IEEE80211_MAX_TIM_LEN 251
90/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
91 6.2.1.1.2.
92
93 802.11e clarifies the figure in section 7.1.2. The frame body is
94 up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
95#define IEEE80211_MAX_DATA_LEN 2304
96/* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
97#define IEEE80211_MAX_FRAME_LEN 2352
98
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;
190 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;
209 } 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
229/**
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];
240 __le16 control;
241 __le16 start_seq_num;
242} __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
289
290/* 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
296/* 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
318/* 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
329/* 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,
361 /* 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,
373};
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,
403 /* 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,
413};
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,
431 /* 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,
440 /* 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,
454 /* 802.11n */
455 WLAN_EID_HT_CAPABILITY = 45,
456 WLAN_EID_HT_EXTRA_INFO = 61,
457 /* 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
465/* 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
481/* 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
488/* A-MSDU 802.11n */
489#define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
490
491/* 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
501/**
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
561#endif /* IEEE80211_H */