net/mac80211/ieee80211_i.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007-2008  Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef IEEE80211_I_H
  13 #define IEEE80211_I_H
  14
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/etherdevice.h>
  26 #include <net/ieee80211_radiotap.h>
  27 #include <net/cfg80211.h>
  28 #include <net/mac80211.h>
  29 #include "key.h"
  30 #include "sta_info.h"
  31
  32 struct ieee80211_local;
  33
  34 /* Maximum number of broadcast/multicast frames to buffer when some of the
  35  * associated stations are using power saving. */
  36 #define AP_MAX_BC_BUFFER 128
  37
  38 /* Maximum number of frames buffered to all STAs, including multicast frames.
  39  * Note: increasing this limit increases the potential memory requirement. Each
  40  * frame can be up to about 2 kB long. */
  41 #define TOTAL_MAX_TX_BUFFER 512
  42
  43 /* Required encryption head and tailroom */
  44 #define IEEE80211_ENCRYPT_HEADROOM 8
  45 #define IEEE80211_ENCRYPT_TAILROOM 18
  46
  47 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  48  * reception of at least three fragmented frames. This limit can be increased
  49  * by changing this define, at the cost of slower frame reassembly and
  50  * increased memory use (about 2 kB of RAM per entry). */
  51 #define IEEE80211_FRAGMENT_MAX 4
  52
  53 /*
  54  * Time after which we ignore scan results and no longer report/use
  55  * them in any way.
  56  */
  57 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  58
  59 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  60
  61 struct ieee80211_fragment_entry {
  62         unsigned long first_frag_time;
  63         unsigned int seq;
  64         unsigned int rx_queue;
  65         unsigned int last_frag;
  66         unsigned int extra_len;
  67         struct sk_buff_head skb_list;
  68         int ccmp; /* Whether fragments were encrypted with CCMP */
  69         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  70 };
  71
  72
  73 struct ieee80211_bss {
  74         /* don't want to look up all the time */
  75         size_t ssid_len;
  76         u8 ssid[IEEE80211_MAX_SSID_LEN];
  77
  78         u8 dtim_period;
  79
  80         bool wmm_used;
  81
  82         unsigned long last_probe_resp;
  83
  84 #ifdef CONFIG_MAC80211_MESH
  85         u8 *mesh_id;
  86         size_t mesh_id_len;
  87         u8 *mesh_cfg;
  88 #endif
  89
  90 #define IEEE80211_MAX_SUPP_RATES 32
  91         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  92         size_t supp_rates_len;
  93
  94         /*
  95          * During assocation, we save an ERP value from a probe response so
  96          * that we can feed ERP info to the driver when handling the
  97          * association completes. these fields probably won't be up-to-date
  98          * otherwise, you probably don't want to use them.
  99          */
 100         bool has_erp_value;
 101         u8 erp_value;
 102 };
 103
 104 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 105 {
 106 #ifdef CONFIG_MAC80211_MESH
 107         return bss->mesh_cfg;
 108 #endif
 109         return NULL;
 110 }
 111
 112 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 113 {
 114 #ifdef CONFIG_MAC80211_MESH
 115         return bss->mesh_id;
 116 #endif
 117         return NULL;
 118 }
 119
 120 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 121 {
 122 #ifdef CONFIG_MAC80211_MESH
 123         return bss->mesh_id_len;
 124 #endif
 125         return 0;
 126 }
 127
 128
 129 typedef unsigned __bitwise__ ieee80211_tx_result;
 130 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 131 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 132 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 133
 134 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 135 #define IEEE80211_TX_UNICAST            BIT(1)
 136 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 137
 138 struct ieee80211_tx_data {
 139         struct sk_buff *skb;
 140         struct ieee80211_local *local;
 141         struct ieee80211_sub_if_data *sdata;
 142         struct sta_info *sta;
 143         struct ieee80211_key *key;
 144
 145         struct ieee80211_channel *channel;
 146
 147         u16 ethertype;
 148         unsigned int flags;
 149 };
 150
 151
 152 typedef unsigned __bitwise__ ieee80211_rx_result;
 153 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 154 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 155 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 156 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 157
 158 #define IEEE80211_RX_IN_SCAN            BIT(0)
 159 /* frame is destined to interface currently processed (incl. multicast frames) */
 160 #define IEEE80211_RX_RA_MATCH           BIT(1)
 161 #define IEEE80211_RX_AMSDU              BIT(2)
 162 #define IEEE80211_RX_FRAGMENTED         BIT(3)
 163 /* only add flags here that do not change with subframes of an aMPDU */
 164
 165 struct ieee80211_rx_data {
 166         struct sk_buff *skb;
 167         struct ieee80211_local *local;
 168         struct ieee80211_sub_if_data *sdata;
 169         struct sta_info *sta;
 170         struct ieee80211_key *key;
 171
 172         unsigned int flags;
 173         int queue;
 174         u32 tkip_iv32;
 175         u16 tkip_iv16;
 176 };
 177
 178 struct beacon_data {
 179         u8 *head, *tail;
 180         int head_len, tail_len;
 181         int dtim_period;
 182 };
 183
 184 struct ieee80211_if_ap {
 185         struct beacon_data *beacon;
 186
 187         struct list_head vlans;
 188
 189         /* yes, this looks ugly, but guarantees that we can later use
 190          * bitmap_empty :)
 191          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 192         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 193         struct sk_buff_head ps_bc_buf;
 194         atomic_t num_sta_ps; /* number of stations in PS mode */
 195         int dtim_count;
 196 };
 197
 198 struct ieee80211_if_wds {
 199         struct sta_info *sta;
 200         u8 remote_addr[ETH_ALEN];
 201 };
 202
 203 struct ieee80211_if_vlan {
 204         struct list_head list;
 205
 206         /* used for all tx if the VLAN is configured to 4-addr mode */
 207         struct sta_info *sta;
 208 };
 209
 210 struct mesh_stats {
 211         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 212         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 213         __u32 fwded_frames;             /* Mesh total forwarded frames */
 214         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 215         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 216         atomic_t estab_plinks;
 217 };
 218
 219 #define PREQ_Q_F_START          0x1
 220 #define PREQ_Q_F_REFRESH        0x2
 221 struct mesh_preq_queue {
 222         struct list_head list;
 223         u8 dst[ETH_ALEN];
 224         u8 flags;
 225 };
 226
 227 enum ieee80211_work_type {
 228         IEEE80211_WORK_ABORT,
 229         IEEE80211_WORK_DIRECT_PROBE,
 230         IEEE80211_WORK_AUTH,
 231         IEEE80211_WORK_ASSOC,
 232         IEEE80211_WORK_REMAIN_ON_CHANNEL,
 233 };
 234
 235 /**
 236  * enum work_done_result - indicates what to do after work was done
 237  *
 238  * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
 239  * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
 240  *      should be requeued.
 241  */
 242 enum work_done_result {
 243         WORK_DONE_DESTROY,
 244         WORK_DONE_REQUEUE,
 245 };
 246
 247 struct ieee80211_work {
 248         struct list_head list;
 249
 250         struct rcu_head rcu_head;
 251
 252         struct ieee80211_sub_if_data *sdata;
 253
 254         enum work_done_result (*done)(struct ieee80211_work *wk,
 255                                       struct sk_buff *skb);
 256
 257         struct ieee80211_channel *chan;
 258         enum nl80211_channel_type chan_type;
 259
 260         unsigned long timeout;
 261         enum ieee80211_work_type type;
 262
 263         u8 filter_ta[ETH_ALEN];
 264
 265         bool started;
 266
 267         union {
 268                 struct {
 269                         int tries;
 270                         u16 algorithm, transaction;
 271                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 272                         u8 ssid_len;
 273                         u8 key[WLAN_KEY_LEN_WEP104];
 274                         u8 key_len, key_idx;
 275                         bool privacy;
 276                 } probe_auth;
 277                 struct {
 278                         struct cfg80211_bss *bss;
 279                         const u8 *supp_rates;
 280                         const u8 *ht_information_ie;
 281                         enum ieee80211_smps_mode smps;
 282                         int tries;
 283                         u16 capability;
 284                         u8 prev_bssid[ETH_ALEN];
 285                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 286                         u8 ssid_len;
 287                         u8 supp_rates_len;
 288                         bool wmm_used, use_11n;
 289                 } assoc;
 290                 struct {
 291                         u32 duration;
 292                         bool started;
 293                 } remain;
 294         };
 295
 296         int ie_len;
 297         /* must be last */
 298         u8 ie[0];
 299 };
 300
 301 /* flags used in struct ieee80211_if_managed.flags */
 302 enum ieee80211_sta_flags {
 303         IEEE80211_STA_BEACON_POLL       = BIT(0),
 304         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 305         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 306         IEEE80211_STA_DISABLE_11N       = BIT(4),
 307         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 308         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 309 };
 310
 311 struct ieee80211_if_managed {
 312         struct timer_list timer;
 313         struct timer_list conn_mon_timer;
 314         struct timer_list bcn_mon_timer;
 315         struct timer_list chswitch_timer;
 316         struct work_struct work;
 317         struct work_struct monitor_work;
 318         struct work_struct chswitch_work;
 319         struct work_struct beacon_loss_work;
 320
 321         unsigned long probe_timeout;
 322         int probe_send_count;
 323
 324         struct mutex mtx;
 325         struct cfg80211_bss *associated;
 326
 327         u8 bssid[ETH_ALEN];
 328
 329         u16 aid;
 330
 331         struct sk_buff_head skb_queue;
 332
 333         unsigned long timers_running; /* used for quiesce/restart */
 334         bool powersave; /* powersave requested for this iface */
 335         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 336                                  ap_smps; /* smps mode AP thinks we're in */
 337
 338         unsigned int flags;
 339
 340         u32 beacon_crc;
 341
 342         enum {
 343                 IEEE80211_MFP_DISABLED,
 344                 IEEE80211_MFP_OPTIONAL,
 345                 IEEE80211_MFP_REQUIRED
 346         } mfp; /* management frame protection */
 347
 348         int wmm_last_param_set;
 349
 350         u8 use_4addr;
 351 };
 352
 353 enum ieee80211_ibss_request {
 354         IEEE80211_IBSS_REQ_RUN  = 0,
 355 };
 356
 357 struct ieee80211_if_ibss {
 358         struct timer_list timer;
 359         struct work_struct work;
 360
 361         struct sk_buff_head skb_queue;
 362
 363         unsigned long request;
 364         unsigned long last_scan_completed;
 365
 366         bool timer_running;
 367
 368         bool fixed_bssid;
 369         bool fixed_channel;
 370         bool privacy;
 371
 372         u8 bssid[ETH_ALEN];
 373         u8 ssid[IEEE80211_MAX_SSID_LEN];
 374         u8 ssid_len, ie_len;
 375         u8 *ie;
 376         struct ieee80211_channel *channel;
 377
 378         unsigned long ibss_join_req;
 379         /* probe response/beacon for IBSS */
 380         struct sk_buff *presp, *skb;
 381
 382         enum {
 383                 IEEE80211_IBSS_MLME_SEARCH,
 384                 IEEE80211_IBSS_MLME_JOINED,
 385         } state;
 386 };
 387
 388 struct ieee80211_if_mesh {
 389         struct work_struct work;
 390         struct timer_list housekeeping_timer;
 391         struct timer_list mesh_path_timer;
 392         struct timer_list mesh_path_root_timer;
 393         struct sk_buff_head skb_queue;
 394
 395         unsigned long timers_running;
 396
 397         unsigned long wrkq_flags;
 398
 399         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 400         size_t mesh_id_len;
 401         /* Active Path Selection Protocol Identifier */
 402         u8 mesh_pp_id;
 403         /* Active Path Selection Metric Identifier */
 404         u8 mesh_pm_id;
 405         /* Congestion Control Mode Identifier */
 406         u8 mesh_cc_id;
 407         /* Synchronization Protocol Identifier */
 408         u8 mesh_sp_id;
 409         /* Authentication Protocol Identifier */
 410         u8 mesh_auth_id;
 411         /* Local mesh Sequence Number */
 412         u32 sn;
 413         /* Last used PREQ ID */
 414         u32 preq_id;
 415         atomic_t mpaths;
 416         /* Timestamp of last SN update */
 417         unsigned long last_sn_update;
 418         /* Timestamp of last SN sent */
 419         unsigned long last_preq;
 420         struct mesh_rmc *rmc;
 421         spinlock_t mesh_preq_queue_lock;
 422         struct mesh_preq_queue preq_queue;
 423         int preq_queue_len;
 424         struct mesh_stats mshstats;
 425         struct mesh_config mshcfg;
 426         u32 mesh_seqnum;
 427         bool accepting_plinks;
 428 };
 429
 430 #ifdef CONFIG_MAC80211_MESH
 431 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 432         do { (msh)->mshstats.name++; } while (0)
 433 #else
 434 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 435         do { } while (0)
 436 #endif
 437
 438 /**
 439  * enum ieee80211_sub_if_data_flags - virtual interface flags
 440  *
 441  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 442  * @IEEE80211_SDATA_PROMISC: interface is promisc
 443  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 444  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 445  *      associated stations and deliver multicast frames both
 446  *      back to wireless media and to the local net stack.
 447  */
 448 enum ieee80211_sub_if_data_flags {
 449         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 450         IEEE80211_SDATA_PROMISC                 = BIT(1),
 451         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 452         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 453 };
 454
 455 struct ieee80211_sub_if_data {
 456         struct list_head list;
 457
 458         struct wireless_dev wdev;
 459
 460         /* keys */
 461         struct list_head key_list;
 462
 463         struct net_device *dev;
 464         struct ieee80211_local *local;
 465
 466         unsigned int flags;
 467
 468         int drop_unencrypted;
 469
 470         char name[IFNAMSIZ];
 471
 472         /*
 473          * keep track of whether the HT opmode (stored in
 474          * vif.bss_info.ht_operation_mode) is valid.
 475          */
 476         bool ht_opmode_valid;
 477
 478         /* Fragment table for host-based reassembly */
 479         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 480         unsigned int fragment_next;
 481
 482 #define NUM_DEFAULT_KEYS 4
 483 #define NUM_DEFAULT_MGMT_KEYS 2
 484         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 485         struct ieee80211_key *default_key;
 486         struct ieee80211_key *default_mgmt_key;
 487
 488         u16 sequence_number;
 489
 490         /*
 491          * AP this belongs to: self in AP mode and
 492          * corresponding AP in VLAN mode, NULL for
 493          * all others (might be needed later in IBSS)
 494          */
 495         struct ieee80211_if_ap *bss;
 496
 497         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 498         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 499
 500         union {
 501                 struct ieee80211_if_ap ap;
 502                 struct ieee80211_if_wds wds;
 503                 struct ieee80211_if_vlan vlan;
 504                 struct ieee80211_if_managed mgd;
 505                 struct ieee80211_if_ibss ibss;
 506 #ifdef CONFIG_MAC80211_MESH
 507                 struct ieee80211_if_mesh mesh;
 508 #endif
 509                 u32 mntr_flags;
 510         } u;
 511
 512 #ifdef CONFIG_MAC80211_DEBUGFS
 513         struct {
 514                 struct dentry *dir;
 515                 struct dentry *default_key;
 516                 struct dentry *default_mgmt_key;
 517         } debugfs;
 518 #endif
 519         /* must be last, dynamically sized area in this! */
 520         struct ieee80211_vif vif;
 521 };
 522
 523 static inline
 524 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 525 {
 526         return container_of(p, struct ieee80211_sub_if_data, vif);
 527 }
 528
 529 static inline void
 530 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 531                             u8 mesh_id_len, u8 *mesh_id)
 532 {
 533 #ifdef CONFIG_MAC80211_MESH
 534         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 535         ifmsh->mesh_id_len = mesh_id_len;
 536         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 537 #else
 538         WARN_ON(1);
 539 #endif
 540 }
 541
 542 enum {
 543         IEEE80211_RX_MSG        = 1,
 544         IEEE80211_TX_STATUS_MSG = 2,
 545         IEEE80211_DELBA_MSG     = 3,
 546         IEEE80211_ADDBA_MSG     = 4,
 547 };
 548
 549 enum queue_stop_reason {
 550         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 551         IEEE80211_QUEUE_STOP_REASON_PS,
 552         IEEE80211_QUEUE_STOP_REASON_CSA,
 553         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 554         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 555         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 556 };
 557
 558 /**
 559  * mac80211 scan flags - currently active scan mode
 560  *
 561  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 562  *      well be on the operating channel
 563  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 564  *      determine if we are on the operating channel or not
 565  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 566  *      gets only set in conjunction with SCAN_SW_SCANNING
 567  */
 568 enum {
 569         SCAN_SW_SCANNING,
 570         SCAN_HW_SCANNING,
 571         SCAN_OFF_CHANNEL,
 572 };
 573
 574 /**
 575  * enum mac80211_scan_state - scan state machine states
 576  *
 577  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 578  *      determines if we should keep on scanning or switch back to the
 579  *      operating channel
 580  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 581  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 582  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 583  *      about us leaving the channel and stop all associated STA interfaces
 584  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 585  *      AP about us being back and restart all associated STA interfaces
 586  */
 587 enum mac80211_scan_state {
 588         SCAN_DECISION,
 589         SCAN_SET_CHANNEL,
 590         SCAN_SEND_PROBE,
 591         SCAN_LEAVE_OPER_CHANNEL,
 592         SCAN_ENTER_OPER_CHANNEL,
 593 };
 594
 595 struct ieee80211_local {
 596         /* embed the driver visible part.
 597          * don't cast (use the static inlines below), but we keep
 598          * it first anyway so they become a no-op */
 599         struct ieee80211_hw hw;
 600
 601         const struct ieee80211_ops *ops;
 602
 603         /*
 604          * work stuff, potentially off-channel (in the future)
 605          */
 606         struct mutex work_mtx;
 607         struct list_head work_list;
 608         struct timer_list work_timer;
 609         struct work_struct work_work;
 610         struct sk_buff_head work_skb_queue;
 611
 612         /*
 613          * private workqueue to mac80211. mac80211 makes this accessible
 614          * via ieee80211_queue_work()
 615          */
 616         struct workqueue_struct *workqueue;
 617
 618         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 619         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 620         spinlock_t queue_stop_reason_lock;
 621
 622         int open_count;
 623         int monitors, cooked_mntrs;
 624         /* number of interfaces with corresponding FIF_ flags */
 625         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
 626         unsigned int filter_flags; /* FIF_* */
 627
 628         /* protects the aggregated multicast list and filter calls */
 629         spinlock_t filter_lock;
 630
 631         /* used for uploading changed mc list */
 632         struct work_struct reconfig_filter;
 633
 634         /* used to reconfigure hardware SM PS */
 635         struct work_struct recalc_smps;
 636
 637         /* aggregated multicast list */
 638         struct dev_addr_list *mc_list;
 639         int mc_count;
 640
 641         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 642
 643         /*
 644          * suspended is true if we finished all the suspend _and_ we have
 645          * not yet come up from resume. This is to be used by mac80211
 646          * to ensure driver sanity during suspend and mac80211's own
 647          * sanity. It can eventually be used for WoW as well.
 648          */
 649         bool suspended;
 650
 651         /*
 652          * Resuming is true while suspended, but when we're reprogramming the
 653          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 654          * again even though some other parts of the stack are still suspended
 655          * and we still drop received frames to avoid waking the stack.
 656          */
 657         bool resuming;
 658
 659         /*
 660          * quiescing is true during the suspend process _only_ to
 661          * ease timer cancelling etc.
 662          */
 663         bool quiescing;
 664
 665         /* device is started */
 666         bool started;
 667
 668         int tx_headroom; /* required headroom for hardware/radiotap */
 669
 670         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 671          * added to skb_queue will be processed, but frames in
 672          * skb_queue_unreliable may be dropped if the total length of these
 673          * queues increases over the limit. */
 674 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 675         struct tasklet_struct tasklet;
 676         struct sk_buff_head skb_queue;
 677         struct sk_buff_head skb_queue_unreliable;
 678
 679         /* Station data */
 680         /*
 681          * The lock only protects the list, hash, timer and counter
 682          * against manipulation, reads are done in RCU. Additionally,
 683          * the lock protects each BSS's TIM bitmap.
 684          */
 685         spinlock_t sta_lock;
 686         unsigned long num_sta;
 687         struct list_head sta_list;
 688         struct sta_info *sta_hash[STA_HASH_SIZE];
 689         struct timer_list sta_cleanup;
 690         int sta_generation;
 691
 692         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 693         struct tasklet_struct tx_pending_tasklet;
 694
 695         /*
 696          * This lock is used to prevent concurrent A-MPDU
 697          * session start/stop processing, this thus also
 698          * synchronises the ->ampdu_action() callback to
 699          * drivers and limits it to one at a time.
 700          */
 701         spinlock_t ampdu_lock;
 702
 703         /* number of interfaces with corresponding IFF_ flags */
 704         atomic_t iff_allmultis, iff_promiscs;
 705
 706         struct rate_control_ref *rate_ctrl;
 707
 708         struct crypto_blkcipher *wep_tx_tfm;
 709         struct crypto_blkcipher *wep_rx_tfm;
 710         u32 wep_iv;
 711
 712         /* see iface.c */
 713         struct list_head interfaces;
 714         struct mutex iflist_mtx;
 715
 716         /*
 717          * Key lock, protects sdata's key_list and sta_info's
 718          * key pointers (write access, they're RCU.)
 719          */
 720         spinlock_t key_lock;
 721
 722
 723         /* Scanning and BSS list */
 724         struct mutex scan_mtx;
 725         unsigned long scanning;
 726         struct cfg80211_ssid scan_ssid;
 727         struct cfg80211_scan_request *int_scan_req;
 728         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 729         struct ieee80211_channel *scan_channel;
 730         enum ieee80211_band hw_scan_band;
 731         int scan_channel_idx;
 732         int scan_ies_len;
 733
 734         enum mac80211_scan_state next_scan_state;
 735         struct delayed_work scan_work;
 736         struct ieee80211_sub_if_data *scan_sdata;
 737         enum nl80211_channel_type oper_channel_type;
 738         struct ieee80211_channel *oper_channel, *csa_channel;
 739
 740         /* Temporary remain-on-channel for off-channel operations */
 741         struct ieee80211_channel *tmp_channel;
 742         enum nl80211_channel_type tmp_channel_type;
 743
 744         /* SNMP counters */
 745         /* dot11CountersTable */
 746         u32 dot11TransmittedFragmentCount;
 747         u32 dot11MulticastTransmittedFrameCount;
 748         u32 dot11FailedCount;
 749         u32 dot11RetryCount;
 750         u32 dot11MultipleRetryCount;
 751         u32 dot11FrameDuplicateCount;
 752         u32 dot11ReceivedFragmentCount;
 753         u32 dot11MulticastReceivedFrameCount;
 754         u32 dot11TransmittedFrameCount;
 755
 756 #ifdef CONFIG_MAC80211_LEDS
 757         int tx_led_counter, rx_led_counter;
 758         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 759         char tx_led_name[32], rx_led_name[32],
 760              assoc_led_name[32], radio_led_name[32];
 761 #endif
 762
 763 #ifdef CONFIG_MAC80211_DEBUGFS
 764         struct work_struct sta_debugfs_add;
 765 #endif
 766
 767 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 768         /* TX/RX handler statistics */
 769         unsigned int tx_handlers_drop;
 770         unsigned int tx_handlers_queued;
 771         unsigned int tx_handlers_drop_unencrypted;
 772         unsigned int tx_handlers_drop_fragment;
 773         unsigned int tx_handlers_drop_wep;
 774         unsigned int tx_handlers_drop_not_assoc;
 775         unsigned int tx_handlers_drop_unauth_port;
 776         unsigned int rx_handlers_drop;
 777         unsigned int rx_handlers_queued;
 778         unsigned int rx_handlers_drop_nullfunc;
 779         unsigned int rx_handlers_drop_defrag;
 780         unsigned int rx_handlers_drop_short;
 781         unsigned int rx_handlers_drop_passive_scan;
 782         unsigned int tx_expand_skb_head;
 783         unsigned int tx_expand_skb_head_cloned;
 784         unsigned int rx_expand_skb_head;
 785         unsigned int rx_expand_skb_head2;
 786         unsigned int rx_handlers_fragments;
 787         unsigned int tx_status_drop;
 788 #define I802_DEBUG_INC(c) (c)++
 789 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 790 #define I802_DEBUG_INC(c) do { } while (0)
 791 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 792
 793
 794         int total_ps_buffered; /* total number of all buffered unicast and
 795                                 * multicast packets for power saving stations
 796                                 */
 797         int wifi_wme_noack_test;
 798         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 799
 800         bool pspolling;
 801         bool offchannel_ps_enabled;
 802         /*
 803          * PS can only be enabled when we have exactly one managed
 804          * interface (and monitors) in PS, this then points there.
 805          */
 806         struct ieee80211_sub_if_data *ps_sdata;
 807         struct work_struct dynamic_ps_enable_work;
 808         struct work_struct dynamic_ps_disable_work;
 809         struct timer_list dynamic_ps_timer;
 810         struct notifier_block network_latency_notifier;
 811
 812         int user_power_level; /* in dBm */
 813         int power_constr_level; /* in dBm */
 814
 815         enum ieee80211_smps_mode smps_mode;
 816
 817         struct work_struct restart_work;
 818
 819 #ifdef CONFIG_MAC80211_DEBUGFS
 820         struct local_debugfsdentries {
 821                 struct dentry *rcdir;
 822                 struct dentry *stations;
 823                 struct dentry *keys;
 824         } debugfs;
 825 #endif
 826 };
 827
 828 static inline struct ieee80211_sub_if_data *
 829 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 830 {
 831         return netdev_priv(dev);
 832 }
 833
 834 /* this struct represents 802.11n's RA/TID combination along with our vif */
 835 struct ieee80211_ra_tid {
 836         struct ieee80211_vif *vif;
 837         u8 ra[ETH_ALEN];
 838         u16 tid;
 839 };
 840
 841 /* Parsed Information Elements */
 842 struct ieee802_11_elems {
 843         u8 *ie_start;
 844         size_t total_len;
 845
 846         /* pointers to IEs */
 847         u8 *ssid;
 848         u8 *supp_rates;
 849         u8 *fh_params;
 850         u8 *ds_params;
 851         u8 *cf_params;
 852         struct ieee80211_tim_ie *tim;
 853         u8 *ibss_params;
 854         u8 *challenge;
 855         u8 *wpa;
 856         u8 *rsn;
 857         u8 *erp_info;
 858         u8 *ext_supp_rates;
 859         u8 *wmm_info;
 860         u8 *wmm_param;
 861         struct ieee80211_ht_cap *ht_cap_elem;
 862         struct ieee80211_ht_info *ht_info_elem;
 863         struct ieee80211_meshconf_ie *mesh_config;
 864         u8 *mesh_id;
 865         u8 *peer_link;
 866         u8 *preq;
 867         u8 *prep;
 868         u8 *perr;
 869         struct ieee80211_rann_ie *rann;
 870         u8 *ch_switch_elem;
 871         u8 *country_elem;
 872         u8 *pwr_constr_elem;
 873         u8 *quiet_elem;         /* first quite element */
 874         u8 *timeout_int;
 875
 876         /* length of them, respectively */
 877         u8 ssid_len;
 878         u8 supp_rates_len;
 879         u8 fh_params_len;
 880         u8 ds_params_len;
 881         u8 cf_params_len;
 882         u8 tim_len;
 883         u8 ibss_params_len;
 884         u8 challenge_len;
 885         u8 wpa_len;
 886         u8 rsn_len;
 887         u8 erp_info_len;
 888         u8 ext_supp_rates_len;
 889         u8 wmm_info_len;
 890         u8 wmm_param_len;
 891         u8 mesh_id_len;
 892         u8 peer_link_len;
 893         u8 preq_len;
 894         u8 prep_len;
 895         u8 perr_len;
 896         u8 ch_switch_elem_len;
 897         u8 country_elem_len;
 898         u8 pwr_constr_elem_len;
 899         u8 quiet_elem_len;
 900         u8 num_of_quiet_elem;   /* can be more the one */
 901         u8 timeout_int_len;
 902 };
 903
 904 static inline struct ieee80211_local *hw_to_local(
 905         struct ieee80211_hw *hw)
 906 {
 907         return container_of(hw, struct ieee80211_local, hw);
 908 }
 909
 910 static inline struct ieee80211_hw *local_to_hw(
 911         struct ieee80211_local *local)
 912 {
 913         return &local->hw;
 914 }
 915
 916
 917 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 918 {
 919         return compare_ether_addr(raddr, addr) == 0 ||
 920                is_broadcast_ether_addr(raddr);
 921 }
 922
 923
 924 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 925 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 926 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 927                                       u32 changed);
 928 void ieee80211_configure_filter(struct ieee80211_local *local);
 929 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 930
 931 extern bool ieee80211_disable_40mhz_24ghz;
 932
 933 /* STA code */
 934 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 935 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
 936                        struct cfg80211_auth_request *req);
 937 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 938                         struct cfg80211_assoc_request *req);
 939 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 940                          struct cfg80211_deauth_request *req,
 941                          void *cookie);
 942 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
 943                            struct cfg80211_disassoc_request *req,
 944                            void *cookie);
 945 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 946                                           struct sk_buff *skb);
 947 void ieee80211_send_pspoll(struct ieee80211_local *local,
 948                            struct ieee80211_sub_if_data *sdata);
 949 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 950 int ieee80211_max_network_latency(struct notifier_block *nb,
 951                                   unsigned long data, void *dummy);
 952 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 953                                       struct ieee80211_channel_sw_ie *sw_elem,
 954                                       struct ieee80211_bss *bss);
 955 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 956 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 957
 958 /* IBSS code */
 959 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 960 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 961 ieee80211_rx_result
 962 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 963 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 964                                         u8 *bssid, u8 *addr, u32 supp_rates);
 965 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 966                         struct cfg80211_ibss_params *params);
 967 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 968 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 969 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 970
 971 /* scan/BSS handling */
 972 void ieee80211_scan_work(struct work_struct *work);
 973 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 974                                     const u8 *ssid, u8 ssid_len);
 975 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 976                            struct cfg80211_scan_request *req);
 977 void ieee80211_scan_cancel(struct ieee80211_local *local);
 978 ieee80211_rx_result
 979 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 980
 981 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 982 struct ieee80211_bss *
 983 ieee80211_bss_info_update(struct ieee80211_local *local,
 984                           struct ieee80211_rx_status *rx_status,
 985                           struct ieee80211_mgmt *mgmt,
 986                           size_t len,
 987                           struct ieee802_11_elems *elems,
 988                           struct ieee80211_channel *channel,
 989                           bool beacon);
 990 struct ieee80211_bss *
 991 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 992                      u8 *ssid, u8 ssid_len);
 993 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 994                           struct ieee80211_bss *bss);
 995
 996 /* off-channel helpers */
 997 void ieee80211_offchannel_stop_beaconing(struct ieee80211_local *local);
 998 void ieee80211_offchannel_stop_station(struct ieee80211_local *local);
 999 void ieee80211_offchannel_return(struct ieee80211_local *local,
1000                                  bool enable_beaconing);
1001
1002 /* interface handling */
1003 int ieee80211_iface_init(void);
1004 void ieee80211_iface_exit(void);
1005 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1006                      struct net_device **new_dev, enum nl80211_iftype type,
1007                      struct vif_params *params);
1008 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1009                              enum nl80211_iftype type);
1010 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1011 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1012 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1013 void ieee80211_recalc_idle(struct ieee80211_local *local);
1014
1015 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1016 {
1017         return netif_running(sdata->dev);
1018 }
1019
1020 /* tx handling */
1021 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1022 void ieee80211_tx_pending(unsigned long data);
1023 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1024                                          struct net_device *dev);
1025 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1026                                        struct net_device *dev);
1027
1028 /*
1029  * radiotap header for status frames
1030  */
1031 struct ieee80211_tx_status_rtap_hdr {
1032         struct ieee80211_radiotap_header hdr;
1033         u8 rate;
1034         u8 padding_for_rate;
1035         __le16 tx_flags;
1036         u8 data_retries;
1037 } __attribute__ ((packed));
1038
1039
1040 /* HT */
1041 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1042                                        struct ieee80211_ht_cap *ht_cap_ie,
1043                                        struct ieee80211_sta_ht_cap *ht_cap);
1044 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1045 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1046                           const u8 *da, u16 tid,
1047                           u16 initiator, u16 reason_code);
1048 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1049                                enum ieee80211_smps_mode smps, const u8 *da,
1050                                const u8 *bssid);
1051
1052 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
1053                                 u16 tid, u16 initiator, u16 reason);
1054 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1055                                     u16 initiator, u16 reason);
1056 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1057 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1058                              struct sta_info *sta,
1059                              struct ieee80211_mgmt *mgmt, size_t len);
1060 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1061                                   struct sta_info *sta,
1062                                   struct ieee80211_mgmt *mgmt,
1063                                   size_t len);
1064 void ieee80211_process_addba_request(struct ieee80211_local *local,
1065                                      struct sta_info *sta,
1066                                      struct ieee80211_mgmt *mgmt,
1067                                      size_t len);
1068
1069 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1070                                    enum ieee80211_back_parties initiator);
1071 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1072                                     enum ieee80211_back_parties initiator);
1073
1074 /* Spectrum management */
1075 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1076                                        struct ieee80211_mgmt *mgmt,
1077                                        size_t len);
1078
1079 /* Suspend/resume and hw reconfiguration */
1080 int ieee80211_reconfig(struct ieee80211_local *local);
1081 void ieee80211_stop_device(struct ieee80211_local *local);
1082
1083 #ifdef CONFIG_PM
1084 int __ieee80211_suspend(struct ieee80211_hw *hw);
1085
1086 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1087 {
1088         return ieee80211_reconfig(hw_to_local(hw));
1089 }
1090 #else
1091 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1092 {
1093         return 0;
1094 }
1095
1096 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1097 {
1098         return 0;
1099 }
1100 #endif
1101
1102 /* utility functions/constants */
1103 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1104 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1105                         enum nl80211_iftype type);
1106 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1107                              int rate, int erp, int short_preamble);
1108 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1109                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1110                                      gfp_t gfp);
1111 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1112 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1113 void ieee802_11_parse_elems(u8 *start, size_t len,
1114                             struct ieee802_11_elems *elems);
1115 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1116                                struct ieee802_11_elems *elems,
1117                                u64 filter, u32 crc);
1118 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1119                               enum ieee80211_band band);
1120
1121 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1122 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1123 void ieee80211_dynamic_ps_timer(unsigned long data);
1124 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1125                              struct ieee80211_sub_if_data *sdata,
1126                              int powersave);
1127 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1128                              struct ieee80211_hdr *hdr);
1129 void ieee80211_beacon_loss_work(struct work_struct *work);
1130
1131 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1132                                      enum queue_stop_reason reason);
1133 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1134                                      enum queue_stop_reason reason);
1135 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1136                                     enum queue_stop_reason reason);
1137 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1138                                     enum queue_stop_reason reason);
1139 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1140                                struct sk_buff *skb);
1141 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1142                                struct sk_buff_head *skbs);
1143
1144 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1145                          u16 transaction, u16 auth_alg,
1146                          u8 *extra, size_t extra_len, const u8 *bssid,
1147                          const u8 *key, u8 key_len, u8 key_idx);
1148 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1149                              const u8 *ie, size_t ie_len,
1150                              enum ieee80211_band band);
1151 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1152                               const u8 *ssid, size_t ssid_len,
1153                               const u8 *ie, size_t ie_len);
1154
1155 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1156                                   const size_t supp_rates_len,
1157                                   const u8 *supp_rates);
1158 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1159                             struct ieee802_11_elems *elems,
1160                             enum ieee80211_band band);
1161 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1162                              enum ieee80211_smps_mode smps_mode);
1163 void ieee80211_recalc_smps(struct ieee80211_local *local,
1164                            struct ieee80211_sub_if_data *forsdata);
1165
1166 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1167                           const u8 *ids, int n_ids, size_t offset);
1168 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1169
1170 /* internal work items */
1171 void ieee80211_work_init(struct ieee80211_local *local);
1172 void ieee80211_add_work(struct ieee80211_work *wk);
1173 void free_work(struct ieee80211_work *wk);
1174 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1175 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1176                                            struct sk_buff *skb);
1177 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1178                                    struct ieee80211_channel *chan,
1179                                    enum nl80211_channel_type channel_type,
1180                                    unsigned int duration, u64 *cookie);
1181 int ieee80211_wk_cancel_remain_on_channel(
1182         struct ieee80211_sub_if_data *sdata, u64 cookie);
1183
1184 #ifdef CONFIG_MAC80211_NOINLINE
1185 #define debug_noinline noinline
1186 #else
1187 #define debug_noinline
1188 #endif
1189
1190 #endif /* IEEE80211_I_H */