linux/net/mac80211/sta_info.h
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   1/*
   2 * Copyright 2002-2005, Devicescape Software, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9#ifndef STA_INFO_H
  10#define STA_INFO_H
  11
  12#include <linux/list.h>
  13#include <linux/types.h>
  14#include <linux/if_ether.h>
  15#include <linux/workqueue.h>
  16#include <linux/average.h>
  17#include <linux/etherdevice.h>
  18#include "key.h"
  19
  20/**
  21 * enum ieee80211_sta_info_flags - Stations flags
  22 *
  23 * These flags are used with &struct sta_info's @flags member, but
  24 * only indirectly with set_sta_flag() and friends.
  25 *
  26 * @WLAN_STA_AUTH: Station is authenticated.
  27 * @WLAN_STA_ASSOC: Station is associated.
  28 * @WLAN_STA_PS_STA: Station is in power-save mode
  29 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
  30 *      This bit is always checked so needs to be enabled for all stations
  31 *      when virtual port control is not in use.
  32 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
  33 *      frames.
  34 * @WLAN_STA_WME: Station is a QoS-STA.
  35 * @WLAN_STA_WDS: Station is one of our WDS peers.
  36 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
  37 *      IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
  38 *      frame to this station is transmitted.
  39 * @WLAN_STA_MFP: Management frame protection is used with this STA.
  40 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
  41 *      during suspend/resume and station removal.
  42 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
  43 *      power-save mode logically to flush frames that might still
  44 *      be in the queues
  45 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
  46 *      station in power-save mode, reply when the driver unblocks.
  47 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
  48 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
  49 *      packets. This means the link is enabled.
  50 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
  51 *      keeping station in power-save mode, reply when the driver
  52 *      unblocks the station.
  53 * @WLAN_STA_SP: Station is in a service period, so don't try to
  54 *      reply to other uAPSD trigger frames or PS-Poll.
  55 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
  56 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
  57 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
  58 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
  59 */
  60enum ieee80211_sta_info_flags {
  61        WLAN_STA_AUTH,
  62        WLAN_STA_ASSOC,
  63        WLAN_STA_PS_STA,
  64        WLAN_STA_AUTHORIZED,
  65        WLAN_STA_SHORT_PREAMBLE,
  66        WLAN_STA_WME,
  67        WLAN_STA_WDS,
  68        WLAN_STA_CLEAR_PS_FILT,
  69        WLAN_STA_MFP,
  70        WLAN_STA_BLOCK_BA,
  71        WLAN_STA_PS_DRIVER,
  72        WLAN_STA_PSPOLL,
  73        WLAN_STA_TDLS_PEER,
  74        WLAN_STA_TDLS_PEER_AUTH,
  75        WLAN_STA_UAPSD,
  76        WLAN_STA_SP,
  77        WLAN_STA_4ADDR_EVENT,
  78        WLAN_STA_INSERTED,
  79        WLAN_STA_RATE_CONTROL,
  80        WLAN_STA_TOFFSET_KNOWN,
  81};
  82
  83#define STA_TID_NUM 16
  84#define ADDBA_RESP_INTERVAL HZ
  85#define HT_AGG_MAX_RETRIES              15
  86#define HT_AGG_BURST_RETRIES            3
  87#define HT_AGG_RETRIES_PERIOD           (15 * HZ)
  88
  89#define HT_AGG_STATE_DRV_READY          0
  90#define HT_AGG_STATE_RESPONSE_RECEIVED  1
  91#define HT_AGG_STATE_OPERATIONAL        2
  92#define HT_AGG_STATE_STOPPING           3
  93#define HT_AGG_STATE_WANT_START         4
  94#define HT_AGG_STATE_WANT_STOP          5
  95
  96/**
  97 * struct tid_ampdu_tx - TID aggregation information (Tx).
  98 *
  99 * @rcu_head: rcu head for freeing structure
 100 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
 101 * @addba_resp_timer: timer for peer's response to addba request
 102 * @pending: pending frames queue -- use sta's spinlock to protect
 103 * @dialog_token: dialog token for aggregation session
 104 * @timeout: session timeout value to be filled in ADDBA requests
 105 * @state: session state (see above)
 106 * @last_tx: jiffies of last tx activity
 107 * @stop_initiator: initiator of a session stop
 108 * @tx_stop: TX DelBA frame when stopping
 109 * @buf_size: reorder buffer size at receiver
 110 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
 111 * @bar_pending: BAR needs to be re-sent
 112 *
 113 * This structure's lifetime is managed by RCU, assignments to
 114 * the array holding it must hold the aggregation mutex.
 115 *
 116 * The TX path can access it under RCU lock-free if, and
 117 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
 118 * set. Otherwise, the TX path must also acquire the spinlock
 119 * and re-check the state, see comments in the tx code
 120 * touching it.
 121 */
 122struct tid_ampdu_tx {
 123        struct rcu_head rcu_head;
 124        struct timer_list session_timer;
 125        struct timer_list addba_resp_timer;
 126        struct sk_buff_head pending;
 127        unsigned long state;
 128        unsigned long last_tx;
 129        u16 timeout;
 130        u8 dialog_token;
 131        u8 stop_initiator;
 132        bool tx_stop;
 133        u8 buf_size;
 134
 135        u16 failed_bar_ssn;
 136        bool bar_pending;
 137};
 138
 139/**
 140 * struct tid_ampdu_rx - TID aggregation information (Rx).
 141 *
 142 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
 143 * @reorder_time: jiffies when skb was added
 144 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
 145 * @reorder_timer: releases expired frames from the reorder buffer.
 146 * @last_rx: jiffies of last rx activity
 147 * @head_seq_num: head sequence number in reordering buffer.
 148 * @stored_mpdu_num: number of MPDUs in reordering buffer
 149 * @ssn: Starting Sequence Number expected to be aggregated.
 150 * @buf_size: buffer size for incoming A-MPDUs
 151 * @timeout: reset timer value (in TUs).
 152 * @dialog_token: dialog token for aggregation session
 153 * @rcu_head: RCU head used for freeing this struct
 154 * @reorder_lock: serializes access to reorder buffer, see below.
 155 *
 156 * This structure's lifetime is managed by RCU, assignments to
 157 * the array holding it must hold the aggregation mutex.
 158 *
 159 * The @reorder_lock is used to protect the members of this
 160 * struct, except for @timeout, @buf_size and @dialog_token,
 161 * which are constant across the lifetime of the struct (the
 162 * dialog token being used only for debugging).
 163 */
 164struct tid_ampdu_rx {
 165        struct rcu_head rcu_head;
 166        spinlock_t reorder_lock;
 167        struct sk_buff **reorder_buf;
 168        unsigned long *reorder_time;
 169        struct timer_list session_timer;
 170        struct timer_list reorder_timer;
 171        unsigned long last_rx;
 172        u16 head_seq_num;
 173        u16 stored_mpdu_num;
 174        u16 ssn;
 175        u16 buf_size;
 176        u16 timeout;
 177        u8 dialog_token;
 178};
 179
 180/**
 181 * struct sta_ampdu_mlme - STA aggregation information.
 182 *
 183 * @tid_rx: aggregation info for Rx per TID -- RCU protected
 184 * @tid_tx: aggregation info for Tx per TID
 185 * @tid_start_tx: sessions where start was requested
 186 * @addba_req_num: number of times addBA request has been sent.
 187 * @last_addba_req_time: timestamp of the last addBA request.
 188 * @dialog_token_allocator: dialog token enumerator for each new session;
 189 * @work: work struct for starting/stopping aggregation
 190 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
 191 *      RX timer expired until the work for it runs
 192 * @tid_rx_stop_requested:  bitmap indicating which BA sessions per TID the
 193 *      driver requested to close until the work for it runs
 194 * @mtx: mutex to protect all TX data (except non-NULL assignments
 195 *      to tid_tx[idx], which are protected by the sta spinlock)
 196 */
 197struct sta_ampdu_mlme {
 198        struct mutex mtx;
 199        /* rx */
 200        struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM];
 201        unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)];
 202        unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)];
 203        /* tx */
 204        struct work_struct work;
 205        struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM];
 206        struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM];
 207        unsigned long last_addba_req_time[STA_TID_NUM];
 208        u8 addba_req_num[STA_TID_NUM];
 209        u8 dialog_token_allocator;
 210};
 211
 212
 213/**
 214 * struct sta_info - STA information
 215 *
 216 * This structure collects information about a station that
 217 * mac80211 is communicating with.
 218 *
 219 * @list: global linked list entry
 220 * @hnext: hash table linked list pointer
 221 * @local: pointer to the global information
 222 * @sdata: virtual interface this station belongs to
 223 * @ptk: peer key negotiated with this station, if any
 224 * @gtk: group keys negotiated with this station, if any
 225 * @rate_ctrl: rate control algorithm reference
 226 * @rate_ctrl_priv: rate control private per-STA pointer
 227 * @last_tx_rate: rate used for last transmit, to report to userspace as
 228 *      "the" transmit rate
 229 * @last_rx_rate_idx: rx status rate index of the last data packet
 230 * @last_rx_rate_flag: rx status flag of the last data packet
 231 * @lock: used for locking all fields that require locking, see comments
 232 *      in the header file.
 233 * @drv_unblock_wk: used for driver PS unblocking
 234 * @listen_interval: listen interval of this station, when we're acting as AP
 235 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
 236 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
 237 *      when it leaves power saving state or polls
 238 * @tx_filtered: buffers (per AC) of frames we already tried to
 239 *      transmit but were filtered by hardware due to STA having
 240 *      entered power saving state, these are also delivered to
 241 *      the station when it leaves powersave or polls for frames
 242 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
 243 * @rx_packets: Number of MSDUs received from this STA
 244 * @rx_bytes: Number of bytes received from this STA
 245 * @wep_weak_iv_count: number of weak WEP IVs received from this station
 246 * @last_rx: time (in jiffies) when last frame was received from this STA
 247 * @last_connected: time (in seconds) when a station got connected
 248 * @num_duplicates: number of duplicate frames received from this STA
 249 * @rx_fragments: number of received MPDUs
 250 * @rx_dropped: number of dropped MPDUs from this STA
 251 * @last_signal: signal of last received frame from this STA
 252 * @avg_signal: moving average of signal of received frames from this STA
 253 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
 254 * @tx_filtered_count: number of frames the hardware filtered for this STA
 255 * @tx_retry_failed: number of frames that failed retry
 256 * @tx_retry_count: total number of retries for frames to this STA
 257 * @fail_avg: moving percentage of failed MSDUs
 258 * @tx_packets: number of RX/TX MSDUs
 259 * @tx_bytes: number of bytes transmitted to this STA
 260 * @tx_fragments: number of transmitted MPDUs
 261 * @tid_seq: per-TID sequence numbers for sending to this STA
 262 * @ampdu_mlme: A-MPDU state machine state
 263 * @timer_to_tid: identity mapping to ID timers
 264 * @llid: Local link ID
 265 * @plid: Peer link ID
 266 * @reason: Cancel reason on PLINK_HOLDING state
 267 * @plink_retries: Retries in establishment
 268 * @ignore_plink_timer: ignore the peer-link timer (used internally)
 269 * @plink_state: peer link state
 270 * @plink_timeout: timeout of peer link
 271 * @plink_timer: peer link watch timer
 272 * @plink_timer_was_running: used by suspend/resume to restore timers
 273 * @t_offset: timing offset relative to this host
 274 * @t_offset_setpoint: reference timing offset of this sta to be used when
 275 *      calculating clockdrift
 276 * @ch_type: peer's channel type
 277 * @debugfs: debug filesystem info
 278 * @dead: set to true when sta is unlinked
 279 * @uploaded: set to true when sta is uploaded to the driver
 280 * @lost_packets: number of consecutive lost packets
 281 * @sta: station information we share with the driver
 282 * @sta_state: duplicates information about station state (for debug)
 283 * @beacon_loss_count: number of times beacon loss has triggered
 284 * @supports_40mhz: tracks whether the station advertised 40 MHz support
 285 *      as we overwrite its HT parameters with the currently used value
 286 */
 287struct sta_info {
 288        /* General information, mostly static */
 289        struct list_head list;
 290        struct sta_info __rcu *hnext;
 291        struct ieee80211_local *local;
 292        struct ieee80211_sub_if_data *sdata;
 293        struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 294        struct ieee80211_key __rcu *ptk;
 295        struct rate_control_ref *rate_ctrl;
 296        void *rate_ctrl_priv;
 297        spinlock_t lock;
 298
 299        struct work_struct drv_unblock_wk;
 300
 301        u16 listen_interval;
 302
 303        bool dead;
 304
 305        bool uploaded;
 306
 307        enum ieee80211_sta_state sta_state;
 308
 309        /* use the accessors defined below */
 310        unsigned long _flags;
 311
 312        /*
 313         * STA powersave frame queues, no more than the internal
 314         * locking required.
 315         */
 316        struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
 317        struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
 318        unsigned long driver_buffered_tids;
 319
 320        /* Updated from RX path only, no locking requirements */
 321        unsigned long rx_packets, rx_bytes;
 322        unsigned long wep_weak_iv_count;
 323        unsigned long last_rx;
 324        long last_connected;
 325        unsigned long num_duplicates;
 326        unsigned long rx_fragments;
 327        unsigned long rx_dropped;
 328        int last_signal;
 329        struct ewma avg_signal;
 330        /* Plus 1 for non-QoS frames */
 331        __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1];
 332
 333        /* Updated from TX status path only, no locking requirements */
 334        unsigned long tx_filtered_count;
 335        unsigned long tx_retry_failed, tx_retry_count;
 336        /* moving percentage of failed MSDUs */
 337        unsigned int fail_avg;
 338
 339        /* Updated from TX path only, no locking requirements */
 340        unsigned long tx_packets;
 341        unsigned long tx_bytes;
 342        unsigned long tx_fragments;
 343        struct ieee80211_tx_rate last_tx_rate;
 344        int last_rx_rate_idx;
 345        int last_rx_rate_flag;
 346        u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
 347
 348        /*
 349         * Aggregation information, locked with lock.
 350         */
 351        struct sta_ampdu_mlme ampdu_mlme;
 352        u8 timer_to_tid[STA_TID_NUM];
 353
 354#ifdef CONFIG_MAC80211_MESH
 355        /*
 356         * Mesh peer link attributes
 357         * TODO: move to a sub-structure that is referenced with pointer?
 358         */
 359        __le16 llid;
 360        __le16 plid;
 361        __le16 reason;
 362        u8 plink_retries;
 363        bool ignore_plink_timer;
 364        bool plink_timer_was_running;
 365        enum nl80211_plink_state plink_state;
 366        u32 plink_timeout;
 367        struct timer_list plink_timer;
 368        s64 t_offset;
 369        s64 t_offset_setpoint;
 370        enum nl80211_channel_type ch_type;
 371#endif
 372
 373#ifdef CONFIG_MAC80211_DEBUGFS
 374        struct sta_info_debugfsdentries {
 375                struct dentry *dir;
 376                bool add_has_run;
 377        } debugfs;
 378#endif
 379
 380        unsigned int lost_packets;
 381        unsigned int beacon_loss_count;
 382
 383        bool supports_40mhz;
 384
 385        /* keep last! */
 386        struct ieee80211_sta sta;
 387};
 388
 389static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
 390{
 391#ifdef CONFIG_MAC80211_MESH
 392        return sta->plink_state;
 393#endif
 394        return NL80211_PLINK_LISTEN;
 395}
 396
 397static inline void set_sta_flag(struct sta_info *sta,
 398                                enum ieee80211_sta_info_flags flag)
 399{
 400        WARN_ON(flag == WLAN_STA_AUTH ||
 401                flag == WLAN_STA_ASSOC ||
 402                flag == WLAN_STA_AUTHORIZED);
 403        set_bit(flag, &sta->_flags);
 404}
 405
 406static inline void clear_sta_flag(struct sta_info *sta,
 407                                  enum ieee80211_sta_info_flags flag)
 408{
 409        WARN_ON(flag == WLAN_STA_AUTH ||
 410                flag == WLAN_STA_ASSOC ||
 411                flag == WLAN_STA_AUTHORIZED);
 412        clear_bit(flag, &sta->_flags);
 413}
 414
 415static inline int test_sta_flag(struct sta_info *sta,
 416                                enum ieee80211_sta_info_flags flag)
 417{
 418        return test_bit(flag, &sta->_flags);
 419}
 420
 421static inline int test_and_clear_sta_flag(struct sta_info *sta,
 422                                          enum ieee80211_sta_info_flags flag)
 423{
 424        WARN_ON(flag == WLAN_STA_AUTH ||
 425                flag == WLAN_STA_ASSOC ||
 426                flag == WLAN_STA_AUTHORIZED);
 427        return test_and_clear_bit(flag, &sta->_flags);
 428}
 429
 430static inline int test_and_set_sta_flag(struct sta_info *sta,
 431                                        enum ieee80211_sta_info_flags flag)
 432{
 433        WARN_ON(flag == WLAN_STA_AUTH ||
 434                flag == WLAN_STA_ASSOC ||
 435                flag == WLAN_STA_AUTHORIZED);
 436        return test_and_set_bit(flag, &sta->_flags);
 437}
 438
 439int sta_info_move_state(struct sta_info *sta,
 440                        enum ieee80211_sta_state new_state);
 441
 442static inline void sta_info_pre_move_state(struct sta_info *sta,
 443                                           enum ieee80211_sta_state new_state)
 444{
 445        int ret;
 446
 447        WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
 448
 449        ret = sta_info_move_state(sta, new_state);
 450        WARN_ON_ONCE(ret);
 451}
 452
 453
 454void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
 455                             struct tid_ampdu_tx *tid_tx);
 456
 457static inline struct tid_ampdu_tx *
 458rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
 459{
 460        return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
 461                                         lockdep_is_held(&sta->lock) ||
 462                                         lockdep_is_held(&sta->ampdu_mlme.mtx));
 463}
 464
 465#define STA_HASH_SIZE 256
 466#define STA_HASH(sta) (sta[5])
 467
 468
 469/* Maximum number of frames to buffer per power saving station per AC */
 470#define STA_MAX_TX_BUFFER       64
 471
 472/* Minimum buffered frame expiry time. If STA uses listen interval that is
 473 * smaller than this value, the minimum value here is used instead. */
 474#define STA_TX_BUFFER_EXPIRE (10 * HZ)
 475
 476/* How often station data is cleaned up (e.g., expiration of buffered frames)
 477 */
 478#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
 479
 480/*
 481 * Get a STA info, must be under RCU read lock.
 482 */
 483struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
 484                              const u8 *addr);
 485
 486struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
 487                                  const u8 *addr);
 488
 489static inline
 490void for_each_sta_info_type_check(struct ieee80211_local *local,
 491                                  const u8 *addr,
 492                                  struct sta_info *sta,
 493                                  struct sta_info *nxt)
 494{
 495}
 496
 497#define for_each_sta_info(local, _addr, _sta, nxt)                      \
 498        for (   /* initialise loop */                                   \
 499                _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
 500                nxt = _sta ? rcu_dereference(_sta->hnext) : NULL;       \
 501                /* typecheck */                                         \
 502                for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
 503                /* continue condition */                                \
 504                _sta;                                                   \
 505                /* advance loop */                                      \
 506                _sta = nxt,                                             \
 507                nxt = _sta ? rcu_dereference(_sta->hnext) : NULL        \
 508             )                                                          \
 509        /* compare address and run code only if it matches */           \
 510        if (ether_addr_equal(_sta->sta.addr, (_addr)))
 511
 512/*
 513 * Get STA info by index, BROKEN!
 514 */
 515struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
 516                                     int idx);
 517/*
 518 * Create a new STA info, caller owns returned structure
 519 * until sta_info_insert().
 520 */
 521struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 522                                const u8 *addr, gfp_t gfp);
 523
 524void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
 525
 526/*
 527 * Insert STA info into hash table/list, returns zero or a
 528 * -EEXIST if (if the same MAC address is already present).
 529 *
 530 * Calling the non-rcu version makes the caller relinquish,
 531 * the _rcu version calls read_lock_rcu() and must be called
 532 * without it held.
 533 */
 534int sta_info_insert(struct sta_info *sta);
 535int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
 536
 537int __must_check __sta_info_destroy(struct sta_info *sta);
 538int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
 539                          const u8 *addr);
 540int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
 541                              const u8 *addr);
 542
 543void sta_info_recalc_tim(struct sta_info *sta);
 544
 545void sta_info_init(struct ieee80211_local *local);
 546void sta_info_stop(struct ieee80211_local *local);
 547int sta_info_flush(struct ieee80211_local *local,
 548                   struct ieee80211_sub_if_data *sdata);
 549void sta_set_rate_info_tx(struct sta_info *sta,
 550                          const struct ieee80211_tx_rate *rate,
 551                          struct rate_info *rinfo);
 552void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
 553                          unsigned long exp_time);
 554
 555void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
 556void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
 557void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
 558
 559#endif /* STA_INFO_H */
 560
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