ieee80211-s1g.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * IEEE 802.11 S1G definitions
  4 *
  5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
  6 * <jkmaline@cc.hut.fi>
  7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
  8 * Copyright (c) 2005, Devicescape Software, Inc.
  9 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
 10 * Copyright (c) 2013 - 2014 Intel Mobile Communications GmbH
 11 * Copyright (c) 2016 - 2017 Intel Deutschland GmbH
 12 * Copyright (c) 2018 - 2025 Intel Corporation
 13 */
 14
 15#ifndef LINUX_IEEE80211_S1G_H
 16#define LINUX_IEEE80211_S1G_H
 17
 18#include <linux/types.h>
 19#include <linux/if_ether.h>
 20
 21/* bits unique to S1G beacon frame control */
 22#define IEEE80211_S1G_BCN_NEXT_TBTT	0x100
 23#define IEEE80211_S1G_BCN_CSSID		0x200
 24#define IEEE80211_S1G_BCN_ANO		0x400
 25
 26/* see 802.11ah-2016 9.9 NDP CMAC frames */
 27#define IEEE80211_S1G_1MHZ_NDP_BITS	25
 28#define IEEE80211_S1G_1MHZ_NDP_BYTES	4
 29#define IEEE80211_S1G_2MHZ_NDP_BITS	37
 30#define IEEE80211_S1G_2MHZ_NDP_BYTES	5
 31
 32/**
 33 * ieee80211_is_s1g_beacon - check if IEEE80211_FTYPE_EXT &&
 34 * IEEE80211_STYPE_S1G_BEACON
 35 * @fc: frame control bytes in little-endian byteorder
 36 * Return: whether or not the frame is an S1G beacon
 37 */
 38static inline bool ieee80211_is_s1g_beacon(__le16 fc)
 39{
 40	return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE |
 41				 IEEE80211_FCTL_STYPE)) ==
 42	       cpu_to_le16(IEEE80211_FTYPE_EXT | IEEE80211_STYPE_S1G_BEACON);
 43}
 44
 45/**
 46 * ieee80211_s1g_has_next_tbtt - check if IEEE80211_S1G_BCN_NEXT_TBTT
 47 * @fc: frame control bytes in little-endian byteorder
 48 * Return: whether or not the frame contains the variable-length
 49 *	next TBTT field
 50 */
 51static inline bool ieee80211_s1g_has_next_tbtt(__le16 fc)
 52{
 53	return ieee80211_is_s1g_beacon(fc) &&
 54		(fc & cpu_to_le16(IEEE80211_S1G_BCN_NEXT_TBTT));
 55}
 56
 57/**
 58 * ieee80211_s1g_has_ano - check if IEEE80211_S1G_BCN_ANO
 59 * @fc: frame control bytes in little-endian byteorder
 60 * Return: whether or not the frame contains the variable-length
 61 *	ANO field
 62 */
 63static inline bool ieee80211_s1g_has_ano(__le16 fc)
 64{
 65	return ieee80211_is_s1g_beacon(fc) &&
 66		(fc & cpu_to_le16(IEEE80211_S1G_BCN_ANO));
 67}
 68
 69/**
 70 * ieee80211_s1g_has_cssid - check if IEEE80211_S1G_BCN_CSSID
 71 * @fc: frame control bytes in little-endian byteorder
 72 * Return: whether or not the frame contains the variable-length
 73 *	compressed SSID field
 74 */
 75static inline bool ieee80211_s1g_has_cssid(__le16 fc)
 76{
 77	return ieee80211_is_s1g_beacon(fc) &&
 78		(fc & cpu_to_le16(IEEE80211_S1G_BCN_CSSID));
 79}
 80
 81/**
 82 * enum ieee80211_s1g_chanwidth - S1G channel widths
 83 * These are defined in IEEE802.11-2016ah Table 10-20
 84 * as BSS Channel Width
 85 *
 86 * @IEEE80211_S1G_CHANWIDTH_1MHZ: 1MHz operating channel
 87 * @IEEE80211_S1G_CHANWIDTH_2MHZ: 2MHz operating channel
 88 * @IEEE80211_S1G_CHANWIDTH_4MHZ: 4MHz operating channel
 89 * @IEEE80211_S1G_CHANWIDTH_8MHZ: 8MHz operating channel
 90 * @IEEE80211_S1G_CHANWIDTH_16MHZ: 16MHz operating channel
 91 */
 92enum ieee80211_s1g_chanwidth {
 93	IEEE80211_S1G_CHANWIDTH_1MHZ = 0,
 94	IEEE80211_S1G_CHANWIDTH_2MHZ = 1,
 95	IEEE80211_S1G_CHANWIDTH_4MHZ = 3,
 96	IEEE80211_S1G_CHANWIDTH_8MHZ = 7,
 97	IEEE80211_S1G_CHANWIDTH_16MHZ = 15,
 98};
 99
100/**
101 * enum ieee80211_s1g_pri_chanwidth - S1G primary channel widths
102 *	described in IEEE80211-2024 Table 10-39.
103 *
104 * @IEEE80211_S1G_PRI_CHANWIDTH_2MHZ: 2MHz primary channel
105 * @IEEE80211_S1G_PRI_CHANWIDTH_1MHZ: 1MHz primary channel
106 */
107enum ieee80211_s1g_pri_chanwidth {
108	IEEE80211_S1G_PRI_CHANWIDTH_2MHZ = 0,
109	IEEE80211_S1G_PRI_CHANWIDTH_1MHZ = 1,
110};
111
112/**
113 * struct ieee80211_s1g_bcn_compat_ie - S1G Beacon Compatibility element
114 * @compat_info: Compatibility Information
115 * @beacon_int: Beacon Interval
116 * @tsf_completion: TSF Completion
117 *
118 * This structure represents the payload of the "S1G Beacon
119 * Compatibility element" as described in IEEE Std 802.11-2020 section
120 * 9.4.2.196.
121 */
122struct ieee80211_s1g_bcn_compat_ie {
123	__le16 compat_info;
124	__le16 beacon_int;
125	__le32 tsf_completion;
126} __packed;
127
128/**
129 * struct ieee80211_s1g_oper_ie - S1G Operation element
130 * @ch_width: S1G Operation Information Channel Width
131 * @oper_class: S1G Operation Information Operating Class
132 * @primary_ch: S1G Operation Information Primary Channel Number
133 * @oper_ch: S1G Operation Information  Channel Center Frequency
134 * @basic_mcs_nss: Basic S1G-MCS and NSS Set
135 *
136 * This structure represents the payload of the "S1G Operation
137 * element" as described in IEEE Std 802.11-2020 section 9.4.2.212.
138 */
139struct ieee80211_s1g_oper_ie {
140	u8 ch_width;
141	u8 oper_class;
142	u8 primary_ch;
143	u8 oper_ch;
144	__le16 basic_mcs_nss;
145} __packed;
146
147/**
148 * struct ieee80211_aid_response_ie - AID Response element
149 * @aid: AID/Group AID
150 * @switch_count: AID Switch Count
151 * @response_int: AID Response Interval
152 *
153 * This structure represents the payload of the "AID Response element"
154 * as described in IEEE Std 802.11-2020 section 9.4.2.194.
155 */
156struct ieee80211_aid_response_ie {
157	__le16 aid;
158	u8 switch_count;
159	__le16 response_int;
160} __packed;
161
162struct ieee80211_s1g_cap {
163	u8 capab_info[10];
164	u8 supp_mcs_nss[5];
165} __packed;
166
167/**
168 * ieee80211_s1g_optional_len - determine length of optional S1G beacon fields
169 * @fc: frame control bytes in little-endian byteorder
170 * Return: total length in bytes of the optional fixed-length fields
171 *
172 * S1G beacons may contain up to three optional fixed-length fields that
173 * precede the variable-length elements. Whether these fields are present
174 * is indicated by flags in the frame control field.
175 *
176 * From IEEE 802.11-2024 section 9.3.4.3:
177 *  - Next TBTT field may be 0 or 3 bytes
178 *  - Short SSID field may be 0 or 4 bytes
179 *  - Access Network Options (ANO) field may be 0 or 1 byte
180 */
181static inline size_t
182ieee80211_s1g_optional_len(__le16 fc)
183{
184	size_t len = 0;
185
186	if (ieee80211_s1g_has_next_tbtt(fc))
187		len += 3;
188
189	if (ieee80211_s1g_has_cssid(fc))
190		len += 4;
191
192	if (ieee80211_s1g_has_ano(fc))
193		len += 1;
194
195	return len;
196}
197
198/* S1G Capabilities Information field */
199#define IEEE80211_S1G_CAPABILITY_LEN	15
200
201#define S1G_CAP0_S1G_LONG	BIT(0)
202#define S1G_CAP0_SGI_1MHZ	BIT(1)
203#define S1G_CAP0_SGI_2MHZ	BIT(2)
204#define S1G_CAP0_SGI_4MHZ	BIT(3)
205#define S1G_CAP0_SGI_8MHZ	BIT(4)
206#define S1G_CAP0_SGI_16MHZ	BIT(5)
207#define S1G_CAP0_SUPP_CH_WIDTH	GENMASK(7, 6)
208
209#define S1G_SUPP_CH_WIDTH_2	0
210#define S1G_SUPP_CH_WIDTH_4	1
211#define S1G_SUPP_CH_WIDTH_8	2
212#define S1G_SUPP_CH_WIDTH_16	3
213#define S1G_SUPP_CH_WIDTH_MAX(cap) ((1 << FIELD_GET(S1G_CAP0_SUPP_CH_WIDTH, \
214						    cap[0])) << 1)
215
216#define S1G_CAP1_RX_LDPC	BIT(0)
217#define S1G_CAP1_TX_STBC	BIT(1)
218#define S1G_CAP1_RX_STBC	BIT(2)
219#define S1G_CAP1_SU_BFER	BIT(3)
220#define S1G_CAP1_SU_BFEE	BIT(4)
221#define S1G_CAP1_BFEE_STS	GENMASK(7, 5)
222
223#define S1G_CAP2_SOUNDING_DIMENSIONS	GENMASK(2, 0)
224#define S1G_CAP2_MU_BFER		BIT(3)
225#define S1G_CAP2_MU_BFEE		BIT(4)
226#define S1G_CAP2_PLUS_HTC_VHT		BIT(5)
227#define S1G_CAP2_TRAVELING_PILOT	GENMASK(7, 6)
228
229#define S1G_CAP3_RD_RESPONDER		BIT(0)
230#define S1G_CAP3_HT_DELAYED_BA		BIT(1)
231#define S1G_CAP3_MAX_MPDU_LEN		BIT(2)
232#define S1G_CAP3_MAX_AMPDU_LEN_EXP	GENMASK(4, 3)
233#define S1G_CAP3_MIN_MPDU_START		GENMASK(7, 5)
234
235#define S1G_CAP4_UPLINK_SYNC	BIT(0)
236#define S1G_CAP4_DYNAMIC_AID	BIT(1)
237#define S1G_CAP4_BAT		BIT(2)
238#define S1G_CAP4_TIME_ADE	BIT(3)
239#define S1G_CAP4_NON_TIM	BIT(4)
240#define S1G_CAP4_GROUP_AID	BIT(5)
241#define S1G_CAP4_STA_TYPE	GENMASK(7, 6)
242
243#define S1G_CAP5_CENT_AUTH_CONTROL	BIT(0)
244#define S1G_CAP5_DIST_AUTH_CONTROL	BIT(1)
245#define S1G_CAP5_AMSDU			BIT(2)
246#define S1G_CAP5_AMPDU			BIT(3)
247#define S1G_CAP5_ASYMMETRIC_BA		BIT(4)
248#define S1G_CAP5_FLOW_CONTROL		BIT(5)
249#define S1G_CAP5_SECTORIZED_BEAM	GENMASK(7, 6)
250
251#define S1G_CAP6_OBSS_MITIGATION	BIT(0)
252#define S1G_CAP6_FRAGMENT_BA		BIT(1)
253#define S1G_CAP6_NDP_PS_POLL		BIT(2)
254#define S1G_CAP6_RAW_OPERATION		BIT(3)
255#define S1G_CAP6_PAGE_SLICING		BIT(4)
256#define S1G_CAP6_TXOP_SHARING_IMP_ACK	BIT(5)
257#define S1G_CAP6_VHT_LINK_ADAPT		GENMASK(7, 6)
258
259#define S1G_CAP7_TACK_AS_PS_POLL		BIT(0)
260#define S1G_CAP7_DUP_1MHZ			BIT(1)
261#define S1G_CAP7_MCS_NEGOTIATION		BIT(2)
262#define S1G_CAP7_1MHZ_CTL_RESPONSE_PREAMBLE	BIT(3)
263#define S1G_CAP7_NDP_BFING_REPORT_POLL		BIT(4)
264#define S1G_CAP7_UNSOLICITED_DYN_AID		BIT(5)
265#define S1G_CAP7_SECTOR_TRAINING_OPERATION	BIT(6)
266#define S1G_CAP7_TEMP_PS_MODE_SWITCH		BIT(7)
267
268#define S1G_CAP8_TWT_GROUPING	BIT(0)
269#define S1G_CAP8_BDT		BIT(1)
270#define S1G_CAP8_COLOR		GENMASK(4, 2)
271#define S1G_CAP8_TWT_REQUEST	BIT(5)
272#define S1G_CAP8_TWT_RESPOND	BIT(6)
273#define S1G_CAP8_PV1_FRAME	BIT(7)
274
275#define S1G_CAP9_LINK_ADAPT_PER_CONTROL_RESPONSE BIT(0)
276
277#define S1G_OPER_CH_WIDTH_PRIMARY	BIT(0)
278#define S1G_OPER_CH_WIDTH_OPER		GENMASK(4, 1)
279#define S1G_OPER_CH_PRIMARY_LOCATION	BIT(5)
280
281#define S1G_2M_PRIMARY_LOCATION_LOWER	0
282#define S1G_2M_PRIMARY_LOCATION_UPPER	1
283
284#define LISTEN_INT_USF	GENMASK(15, 14)
285#define LISTEN_INT_UI	GENMASK(13, 0)
286
287#define IEEE80211_MAX_USF	FIELD_MAX(LISTEN_INT_USF)
288#define IEEE80211_MAX_UI	FIELD_MAX(LISTEN_INT_UI)
289
290/* S1G encoding types */
291#define IEEE80211_S1G_TIM_ENC_MODE_BLOCK	0
292#define IEEE80211_S1G_TIM_ENC_MODE_SINGLE	1
293#define IEEE80211_S1G_TIM_ENC_MODE_OLB		2
294
295enum ieee80211_s1g_actioncode {
296	WLAN_S1G_AID_SWITCH_REQUEST,
297	WLAN_S1G_AID_SWITCH_RESPONSE,
298	WLAN_S1G_SYNC_CONTROL,
299	WLAN_S1G_STA_INFO_ANNOUNCE,
300	WLAN_S1G_EDCA_PARAM_SET,
301	WLAN_S1G_EL_OPERATION,
302	WLAN_S1G_TWT_SETUP,
303	WLAN_S1G_TWT_TEARDOWN,
304	WLAN_S1G_SECT_GROUP_ID_LIST,
305	WLAN_S1G_SECT_ID_FEEDBACK,
306	WLAN_S1G_TWT_INFORMATION = 11,
307};
308
309/**
310 * ieee80211_is_s1g_short_beacon - check if frame is an S1G short beacon
311 * @fc: frame control bytes in little-endian byteorder
312 * @variable: pointer to the beacon frame elements
313 * @variable_len: length of the frame elements
314 * Return: whether or not the frame is an S1G short beacon. As per
315 *	IEEE80211-2024 11.1.3.10.1, The S1G beacon compatibility element shall
316 *	always be present as the first element in beacon frames generated at a
317 *	TBTT (Target Beacon Transmission Time), so any frame not containing
318 *	this element must have been generated at a TSBTT (Target Short Beacon
319 *	Transmission Time) that is not a TBTT. Additionally, short beacons are
320 *	prohibited from containing the S1G beacon compatibility element as per
321 *	IEEE80211-2024 9.3.4.3 Table 9-76, so if we have an S1G beacon with
322 *	either no elements or the first element is not the beacon compatibility
323 *	element, we have a short beacon.
324 */
325static inline bool ieee80211_is_s1g_short_beacon(__le16 fc, const u8 *variable,
326						 size_t variable_len)
327{
328	if (!ieee80211_is_s1g_beacon(fc))
329		return false;
330
331	/*
332	 * If the frame does not contain at least 1 element (this is perfectly
333	 * valid in a short beacon) and is an S1G beacon, we have a short
334	 * beacon.
335	 */
336	if (variable_len < 2)
337		return true;
338
339	return variable[0] != WLAN_EID_S1G_BCN_COMPAT;
340}
341
342struct s1g_tim_aid {
343	u16 aid;
344	u8 target_blk; /* Target block index */
345	u8 target_subblk; /* Target subblock index */
346	u8 target_subblk_bit; /* Target subblock bit */
347};
348
349struct s1g_tim_enc_block {
350	u8 enc_mode;
351	bool inverse;
352	const u8 *ptr;
353	u8 len;
354
355	/*
356	 * For an OLB encoded block that spans multiple blocks, this
357	 * is the offset into the span described by that encoded block.
358	 */
359	u8 olb_blk_offset;
360};
361
362/*
363 * Helper routines to quickly extract the length of an encoded block. Validation
364 * is also performed to ensure the length extracted lies within the TIM.
365 */
366
367static inline int ieee80211_s1g_len_bitmap(const u8 *ptr, const u8 *end)
368{
369	u8 blkmap;
370	u8 n_subblks;
371
372	if (ptr >= end)
373		return -EINVAL;
374
375	blkmap = *ptr;
376	n_subblks = hweight8(blkmap);
377
378	if (ptr + 1 + n_subblks > end)
379		return -EINVAL;
380
381	return 1 + n_subblks;
382}
383
384static inline int ieee80211_s1g_len_single(const u8 *ptr, const u8 *end)
385{
386	return (ptr + 1 > end) ? -EINVAL : 1;
387}
388
389static inline int ieee80211_s1g_len_olb(const u8 *ptr, const u8 *end)
390{
391	if (ptr >= end)
392		return -EINVAL;
393
394	return (ptr + 1 + *ptr > end) ? -EINVAL : 1 + *ptr;
395}
396
397/*
398 * Enumerate all encoded blocks until we find the encoded block that describes
399 * our target AID. OLB is a special case as a single encoded block can describe
400 * multiple blocks as a single encoded block.
401 */
402static inline int ieee80211_s1g_find_target_block(struct s1g_tim_enc_block *enc,
403						  const struct s1g_tim_aid *aid,
404						  const u8 *ptr, const u8 *end)
405{
406	/* need at least block-control octet */
407	while (ptr + 1 <= end) {
408		u8 ctrl = *ptr++;
409		u8 mode = ctrl & 0x03;
410		bool contains, inverse = ctrl & BIT(2);
411		u8 span, blk_off = ctrl >> 3;
412		int len;
413
414		switch (mode) {
415		case IEEE80211_S1G_TIM_ENC_MODE_BLOCK:
416			len = ieee80211_s1g_len_bitmap(ptr, end);
417			contains = blk_off == aid->target_blk;
418			break;
419		case IEEE80211_S1G_TIM_ENC_MODE_SINGLE:
420			len = ieee80211_s1g_len_single(ptr, end);
421			contains = blk_off == aid->target_blk;
422			break;
423		case IEEE80211_S1G_TIM_ENC_MODE_OLB:
424			len = ieee80211_s1g_len_olb(ptr, end);
425			/*
426			 * An OLB encoded block can describe more then one
427			 * block, meaning an encoded OLB block can span more
428			 * then a single block.
429			 */
430			if (len > 0) {
431				/* Minus one for the length octet */
432				span = DIV_ROUND_UP(len - 1, 8);
433				/*
434				 * Check if our target block lies within the
435				 * block span described by this encoded block.
436				 */
437				contains = (aid->target_blk >= blk_off) &&
438					   (aid->target_blk < blk_off + span);
439			}
440			break;
441		default:
442			return -EOPNOTSUPP;
443		}
444
445		if (len < 0)
446			return len;
447
448		if (contains) {
449			enc->enc_mode = mode;
450			enc->inverse = inverse;
451			enc->ptr = ptr;
452			enc->len = (u8)len;
453			enc->olb_blk_offset = blk_off;
454			return 0;
455		}
456
457		ptr += len;
458	}
459
460	return -ENOENT;
461}
462
463static inline bool ieee80211_s1g_parse_bitmap(struct s1g_tim_enc_block *enc,
464					      struct s1g_tim_aid *aid)
465{
466	const u8 *ptr = enc->ptr;
467	u8 blkmap = *ptr++;
468
469	/*
470	 * If our block bitmap does not contain a set bit that corresponds
471	 * to our AID, it could mean a variety of things depending on if
472	 * the encoding mode is inverted or not.
473	 *
474	 * 1. If inverted, it means the entire subblock is present and hence
475	 *    our AID has been set.
476	 * 2. If not inverted, it means our subblock is not present and hence
477	 *    it is all zero meaning our AID is not set.
478	 */
479	if (!(blkmap & BIT(aid->target_subblk)))
480		return enc->inverse;
481
482	/*
483	 * Increment ptr by the number of set subblocks that appear before our
484	 * target subblock. If our target subblock is 0, do nothing as ptr
485	 * already points to our target subblock.
486	 */
487	if (aid->target_subblk)
488		ptr += hweight8(blkmap & GENMASK(aid->target_subblk - 1, 0));
489
490	return !!(*ptr & BIT(aid->target_subblk_bit)) ^ enc->inverse;
491}
492
493static inline bool ieee80211_s1g_parse_single(struct s1g_tim_enc_block *enc,
494					      struct s1g_tim_aid *aid)
495{
496	/*
497	 * Single AID mode describes, as the name suggests, a single AID
498	 * within the block described by the encoded block. The octet
499	 * contains the 6 LSBs of the AID described in the block. The other
500	 * 2 bits are reserved. When inversed, every single AID described
501	 * by the current block have buffered traffic except for the AID
502	 * described in the single AID octet.
503	 */
504	return ((*enc->ptr & 0x3f) == (aid->aid & 0x3f)) ^ enc->inverse;
505}
506
507static inline bool ieee80211_s1g_parse_olb(struct s1g_tim_enc_block *enc,
508					   struct s1g_tim_aid *aid)
509{
510	const u8 *ptr = enc->ptr;
511	u8 blk_len = *ptr++;
512	/*
513	 * Given an OLB encoded block that describes multiple blocks,
514	 * calculate the offset into the span. Then calculate the
515	 * subblock location normally.
516	 */
517	u16 span_offset = aid->target_blk - enc->olb_blk_offset;
518	u16 subblk_idx = span_offset * 8 + aid->target_subblk;
519
520	if (subblk_idx >= blk_len)
521		return enc->inverse;
522
523	return !!(ptr[subblk_idx] & BIT(aid->target_subblk_bit)) ^ enc->inverse;
524}
525
526/*
527 * An S1G PVB has 3 non optional encoding types, each that can be inverted.
528 * An S1G PVB is constructed with zero or more encoded block subfields. Each
529 * encoded block represents a single "block" of AIDs (64), and each encoded
530 * block can contain one of the 3 encoding types alongside a single bit for
531 * whether the bits should be inverted.
532 *
533 * As the standard makes no guarantee about the ordering of encoded blocks,
534 * we must parse every encoded block in the worst case scenario given an
535 * AID that lies within the last block.
536 */
537static inline bool ieee80211_s1g_check_tim(const struct ieee80211_tim_ie *tim,
538					   u8 tim_len, u16 aid)
539{
540	int err;
541	struct s1g_tim_aid target_aid;
542	struct s1g_tim_enc_block enc_blk;
543
544	if (tim_len < 3)
545		return false;
546
547	target_aid.aid = aid;
548	target_aid.target_blk = (aid >> 6) & 0x1f;
549	target_aid.target_subblk = (aid >> 3) & 0x7;
550	target_aid.target_subblk_bit = aid & 0x7;
551
552	/*
553	 * Find our AIDs target encoded block and fill &enc_blk with the
554	 * encoded blocks information. If no entry is found or an error
555	 * occurs return false.
556	 */
557	err = ieee80211_s1g_find_target_block(&enc_blk, &target_aid,
558					      tim->virtual_map,
559					      (const u8 *)tim + tim_len + 2);
560	if (err)
561		return false;
562
563	switch (enc_blk.enc_mode) {
564	case IEEE80211_S1G_TIM_ENC_MODE_BLOCK:
565		return ieee80211_s1g_parse_bitmap(&enc_blk, &target_aid);
566	case IEEE80211_S1G_TIM_ENC_MODE_SINGLE:
567		return ieee80211_s1g_parse_single(&enc_blk, &target_aid);
568	case IEEE80211_S1G_TIM_ENC_MODE_OLB:
569		return ieee80211_s1g_parse_olb(&enc_blk, &target_aid);
570	default:
571		return false;
572	}
573}
574
575#endif /* LINUX_IEEE80211_H */