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 2007-2010  Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef IEEE80211_I_H
  14 #define IEEE80211_I_H
  15
  16 #include <linux/kernel.h>
  17 #include <linux/device.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/list.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/types.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/leds.h>
  28 #include <linux/idr.h>
  29 #include <net/ieee80211_radiotap.h>
  30 #include <net/cfg80211.h>
  31 #include <net/mac80211.h>
  32 #include "key.h"
  33 #include "sta_info.h"
  34 #include "debug.h"
  35
  36 struct ieee80211_local;
  37
  38 /* Maximum number of broadcast/multicast frames to buffer when some of the
  39  * associated stations are using power saving. */
  40 #define AP_MAX_BC_BUFFER 128
  41
  42 /* Maximum number of frames buffered to all STAs, including multicast frames.
  43  * Note: increasing this limit increases the potential memory requirement. Each
  44  * frame can be up to about 2 kB long. */
  45 #define TOTAL_MAX_TX_BUFFER 512
  46
  47 /* Required encryption head and tailroom */
  48 #define IEEE80211_ENCRYPT_HEADROOM 8
  49 #define IEEE80211_ENCRYPT_TAILROOM 18
  50
  51 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  52  * reception of at least three fragmented frames. This limit can be increased
  53  * by changing this define, at the cost of slower frame reassembly and
  54  * increased memory use (about 2 kB of RAM per entry). */
  55 #define IEEE80211_FRAGMENT_MAX 4
  56
  57 /* power level hasn't been configured (or set to automatic) */
  58 #define IEEE80211_UNSET_POWER_LEVEL     INT_MIN
  59
  60 /*
  61  * Some APs experience problems when working with U-APSD. Decrease the
  62  * probability of that happening by using legacy mode for all ACs but VO.
  63  * The AP that caused us trouble was a Cisco 4410N. It ignores our
  64  * setting, and always treats non-VO ACs as legacy.
  65  */
  66 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
  67         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
  68
  69 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  70         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  71
  72 #define IEEE80211_DEAUTH_FRAME_LEN      (24 /* hdr */ + 2 /* reason */)
  73
  74 struct ieee80211_fragment_entry {
  75         unsigned long first_frag_time;
  76         unsigned int seq;
  77         unsigned int rx_queue;
  78         unsigned int last_frag;
  79         unsigned int extra_len;
  80         struct sk_buff_head skb_list;
  81         int ccmp; /* Whether fragments were encrypted with CCMP */
  82         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  83 };
  84
  85
  86 struct ieee80211_bss {
  87         u32 device_ts_beacon, device_ts_presp;
  88
  89         bool wmm_used;
  90         bool uapsd_supported;
  91
  92 #define IEEE80211_MAX_SUPP_RATES 32
  93         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  94         size_t supp_rates_len;
  95         struct ieee80211_rate *beacon_rate;
  96
  97         /*
  98          * During association, we save an ERP value from a probe response so
  99          * that we can feed ERP info to the driver when handling the
 100          * association completes. these fields probably won't be up-to-date
 101          * otherwise, you probably don't want to use them.
 102          */
 103         bool has_erp_value;
 104         u8 erp_value;
 105
 106         /* Keep track of the corruption of the last beacon/probe response. */
 107         u8 corrupt_data;
 108
 109         /* Keep track of what bits of information we have valid info for. */
 110         u8 valid_data;
 111 };
 112
 113 /**
 114  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
 115  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
 116  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
 117  *
 118  * These are bss flags that are attached to a bss in the
 119  * @corrupt_data field of &struct ieee80211_bss.
 120  */
 121 enum ieee80211_bss_corrupt_data_flags {
 122         IEEE80211_BSS_CORRUPT_BEACON            = BIT(0),
 123         IEEE80211_BSS_CORRUPT_PROBE_RESP        = BIT(1)
 124 };
 125
 126 /**
 127  * enum ieee80211_valid_data_flags - BSS valid data flags
 128  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
 129  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
 130  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
 131  *
 132  * These are bss flags that are attached to a bss in the
 133  * @valid_data field of &struct ieee80211_bss.  They show which parts
 134  * of the data structure were received as a result of an un-corrupted
 135  * beacon/probe response.
 136  */
 137 enum ieee80211_bss_valid_data_flags {
 138         IEEE80211_BSS_VALID_WMM                 = BIT(1),
 139         IEEE80211_BSS_VALID_RATES               = BIT(2),
 140         IEEE80211_BSS_VALID_ERP                 = BIT(3)
 141 };
 142
 143 typedef unsigned __bitwise__ ieee80211_tx_result;
 144 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 145 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 146 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 147
 148 #define IEEE80211_TX_UNICAST            BIT(1)
 149 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 150
 151 struct ieee80211_tx_data {
 152         struct sk_buff *skb;
 153         struct sk_buff_head skbs;
 154         struct ieee80211_local *local;
 155         struct ieee80211_sub_if_data *sdata;
 156         struct sta_info *sta;
 157         struct ieee80211_key *key;
 158         struct ieee80211_tx_rate rate;
 159
 160         unsigned int flags;
 161 };
 162
 163
 164 typedef unsigned __bitwise__ ieee80211_rx_result;
 165 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 166 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 167 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 168 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 169
 170 /**
 171  * enum ieee80211_packet_rx_flags - packet RX flags
 172  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
 173  *      (incl. multicast frames)
 174  * @IEEE80211_RX_FRAGMENTED: fragmented frame
 175  * @IEEE80211_RX_AMSDU: a-MSDU packet
 176  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 177  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 178  *
 179  * These are per-frame flags that are attached to a frame in the
 180  * @rx_flags field of &struct ieee80211_rx_status.
 181  */
 182 enum ieee80211_packet_rx_flags {
 183         IEEE80211_RX_RA_MATCH                   = BIT(1),
 184         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 185         IEEE80211_RX_AMSDU                      = BIT(3),
 186         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 187         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 188 };
 189
 190 /**
 191  * enum ieee80211_rx_flags - RX data flags
 192  *
 193  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 194  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 195  *      to cfg80211_report_obss_beacon().
 196  *
 197  * These flags are used across handling multiple interfaces
 198  * for a single frame.
 199  */
 200 enum ieee80211_rx_flags {
 201         IEEE80211_RX_CMNTR              = BIT(0),
 202         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 203 };
 204
 205 struct ieee80211_rx_data {
 206         struct sk_buff *skb;
 207         struct ieee80211_local *local;
 208         struct ieee80211_sub_if_data *sdata;
 209         struct sta_info *sta;
 210         struct ieee80211_key *key;
 211
 212         unsigned int flags;
 213
 214         /*
 215          * Index into sequence numbers array, 0..16
 216          * since the last (16) is used for non-QoS,
 217          * will be 16 on non-QoS frames.
 218          */
 219         int seqno_idx;
 220
 221         /*
 222          * Index into the security IV/PN arrays, 0..16
 223          * since the last (16) is used for CCMP-encrypted
 224          * management frames, will be set to 16 on mgmt
 225          * frames and 0 on non-QoS frames.
 226          */
 227         int security_idx;
 228
 229         u32 tkip_iv32;
 230         u16 tkip_iv16;
 231 };
 232
 233 struct ieee80211_csa_settings {
 234         const u16 *counter_offsets_beacon;
 235         const u16 *counter_offsets_presp;
 236
 237         int n_counter_offsets_beacon;
 238         int n_counter_offsets_presp;
 239
 240         u8 count;
 241 };
 242
 243 struct beacon_data {
 244         u8 *head, *tail;
 245         int head_len, tail_len;
 246         struct ieee80211_meshconf_ie *meshconf;
 247         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 248         u8 csa_current_counter;
 249         struct rcu_head rcu_head;
 250 };
 251
 252 struct probe_resp {
 253         struct rcu_head rcu_head;
 254         int len;
 255         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 256         u8 data[0];
 257 };
 258
 259 struct ps_data {
 260         /* yes, this looks ugly, but guarantees that we can later use
 261          * bitmap_empty :)
 262          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 263         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
 264                         __aligned(__alignof__(unsigned long));
 265         struct sk_buff_head bc_buf;
 266         atomic_t num_sta_ps; /* number of stations in PS mode */
 267         int dtim_count;
 268         bool dtim_bc_mc;
 269 };
 270
 271 struct ieee80211_if_ap {
 272         struct beacon_data __rcu *beacon;
 273         struct probe_resp __rcu *probe_resp;
 274
 275         /* to be used after channel switch. */
 276         struct cfg80211_beacon_data *next_beacon;
 277         struct list_head vlans; /* write-protected with RTNL and local->mtx */
 278
 279         struct ps_data ps;
 280         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 281         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 282                          driver_smps_mode; /* smps mode request */
 283
 284         struct work_struct request_smps_work;
 285 };
 286
 287 struct ieee80211_if_wds {
 288         struct sta_info *sta;
 289         u8 remote_addr[ETH_ALEN];
 290 };
 291
 292 struct ieee80211_if_vlan {
 293         struct list_head list; /* write-protected with RTNL and local->mtx */
 294
 295         /* used for all tx if the VLAN is configured to 4-addr mode */
 296         struct sta_info __rcu *sta;
 297 };
 298
 299 struct mesh_stats {
 300         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 301         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 302         __u32 fwded_frames;             /* Mesh total forwarded frames */
 303         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 304         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 305         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 306 };
 307
 308 #define PREQ_Q_F_START          0x1
 309 #define PREQ_Q_F_REFRESH        0x2
 310 struct mesh_preq_queue {
 311         struct list_head list;
 312         u8 dst[ETH_ALEN];
 313         u8 flags;
 314 };
 315
 316 #if HZ/100 == 0
 317 #define IEEE80211_ROC_MIN_LEFT  1
 318 #else
 319 #define IEEE80211_ROC_MIN_LEFT  (HZ/100)
 320 #endif
 321
 322 struct ieee80211_roc_work {
 323         struct list_head list;
 324         struct list_head dependents;
 325
 326         struct delayed_work work;
 327
 328         struct ieee80211_sub_if_data *sdata;
 329
 330         struct ieee80211_channel *chan;
 331
 332         bool started, abort, hw_begun, notified;
 333         bool to_be_freed;
 334         bool on_channel;
 335
 336         unsigned long hw_start_time;
 337
 338         u32 duration, req_duration;
 339         struct sk_buff *frame;
 340         u64 cookie, mgmt_tx_cookie;
 341         enum ieee80211_roc_type type;
 342 };
 343
 344 /* flags used in struct ieee80211_if_managed.flags */
 345 enum ieee80211_sta_flags {
 346         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 347         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 348         IEEE80211_STA_DISABLE_HT        = BIT(4),
 349         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 350         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 351         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 352         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 353         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 354         IEEE80211_STA_DISABLE_VHT       = BIT(11),
 355         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
 356         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
 357         IEEE80211_STA_DISABLE_WMM       = BIT(14),
 358         IEEE80211_STA_ENABLE_RRM        = BIT(15),
 359 };
 360
 361 struct ieee80211_mgd_auth_data {
 362         struct cfg80211_bss *bss;
 363         unsigned long timeout;
 364         int tries;
 365         u16 algorithm, expected_transaction;
 366
 367         u8 key[WLAN_KEY_LEN_WEP104];
 368         u8 key_len, key_idx;
 369         bool done;
 370         bool timeout_started;
 371
 372         u16 sae_trans, sae_status;
 373         size_t data_len;
 374         u8 data[];
 375 };
 376
 377 struct ieee80211_mgd_assoc_data {
 378         struct cfg80211_bss *bss;
 379         const u8 *supp_rates;
 380
 381         unsigned long timeout;
 382         int tries;
 383
 384         u16 capability;
 385         u8 prev_bssid[ETH_ALEN];
 386         u8 ssid[IEEE80211_MAX_SSID_LEN];
 387         u8 ssid_len;
 388         u8 supp_rates_len;
 389         bool wmm, uapsd;
 390         bool need_beacon;
 391         bool synced;
 392         bool timeout_started;
 393
 394         u8 ap_ht_param;
 395
 396         struct ieee80211_vht_cap ap_vht_cap;
 397
 398         size_t ie_len;
 399         u8 ie[];
 400 };
 401
 402 struct ieee80211_sta_tx_tspec {
 403         /* timestamp of the first packet in the time slice */
 404         unsigned long time_slice_start;
 405
 406         u32 admitted_time; /* in usecs, unlike over the air */
 407         u8 tsid;
 408         s8 up; /* signed to be able to invalidate with -1 during teardown */
 409
 410         /* consumed TX time in microseconds in the time slice */
 411         u32 consumed_tx_time;
 412         enum {
 413                 TX_TSPEC_ACTION_NONE = 0,
 414                 TX_TSPEC_ACTION_DOWNGRADE,
 415                 TX_TSPEC_ACTION_STOP_DOWNGRADE,
 416         } action;
 417         bool downgraded;
 418 };
 419
 420 struct ieee80211_if_managed {
 421         struct timer_list timer;
 422         struct timer_list conn_mon_timer;
 423         struct timer_list bcn_mon_timer;
 424         struct timer_list chswitch_timer;
 425         struct work_struct monitor_work;
 426         struct work_struct chswitch_work;
 427         struct work_struct beacon_connection_loss_work;
 428         struct work_struct csa_connection_drop_work;
 429
 430         unsigned long beacon_timeout;
 431         unsigned long probe_timeout;
 432         int probe_send_count;
 433         bool nullfunc_failed;
 434         bool connection_loss;
 435
 436         struct cfg80211_bss *associated;
 437         struct ieee80211_mgd_auth_data *auth_data;
 438         struct ieee80211_mgd_assoc_data *assoc_data;
 439
 440         u8 bssid[ETH_ALEN];
 441
 442         u16 aid;
 443
 444         bool powersave; /* powersave requested for this iface */
 445         bool broken_ap; /* AP is broken -- turn off powersave */
 446         bool have_beacon;
 447         u8 dtim_period;
 448         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 449                                  driver_smps_mode; /* smps mode request */
 450
 451         struct work_struct request_smps_work;
 452
 453         unsigned int flags;
 454
 455         bool csa_waiting_bcn;
 456
 457         bool beacon_crc_valid;
 458         u32 beacon_crc;
 459
 460         bool status_acked;
 461         bool status_received;
 462         __le16 status_fc;
 463
 464         enum {
 465                 IEEE80211_MFP_DISABLED,
 466                 IEEE80211_MFP_OPTIONAL,
 467                 IEEE80211_MFP_REQUIRED
 468         } mfp; /* management frame protection */
 469
 470         /*
 471          * Bitmask of enabled u-apsd queues,
 472          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 473          * to take effect.
 474          */
 475         unsigned int uapsd_queues;
 476
 477         /*
 478          * Maximum number of buffered frames AP can deliver during a
 479          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 480          * Needs a new association to take effect.
 481          */
 482         unsigned int uapsd_max_sp_len;
 483
 484         int wmm_last_param_set;
 485
 486         u8 use_4addr;
 487
 488         s16 p2p_noa_index;
 489
 490         /* Signal strength from the last Beacon frame in the current BSS. */
 491         int last_beacon_signal;
 492
 493         /*
 494          * Weighted average of the signal strength from Beacon frames in the
 495          * current BSS. This is in units of 1/16 of the signal unit to maintain
 496          * accuracy and to speed up calculations, i.e., the value need to be
 497          * divided by 16 to get the actual value.
 498          */
 499         int ave_beacon_signal;
 500
 501         /*
 502          * Number of Beacon frames used in ave_beacon_signal. This can be used
 503          * to avoid generating less reliable cqm events that would be based
 504          * only on couple of received frames.
 505          */
 506         unsigned int count_beacon_signal;
 507
 508         /*
 509          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 510          * that triggered a cqm event. 0 indicates that no event has been
 511          * generated for the current association.
 512          */
 513         int last_cqm_event_signal;
 514
 515         /*
 516          * State variables for keeping track of RSSI of the AP currently
 517          * connected to and informing driver when RSSI has gone
 518          * below/above a certain threshold.
 519          */
 520         int rssi_min_thold, rssi_max_thold;
 521         int last_ave_beacon_signal;
 522
 523         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 524         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 525         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 526         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
 527
 528         /* TDLS support */
 529         u8 tdls_peer[ETH_ALEN] __aligned(2);
 530         struct delayed_work tdls_peer_del_work;
 531         struct sk_buff *orig_teardown_skb; /* The original teardown skb */
 532         struct sk_buff *teardown_skb; /* A copy to send through the AP */
 533         spinlock_t teardown_lock; /* To lock changing teardown_skb */
 534         bool tdls_chan_switch_prohibited;
 535
 536         /* WMM-AC TSPEC support */
 537         struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
 538         /* Use a separate work struct so that we can do something here
 539          * while the sdata->work is flushing the queues, for example.
 540          * otherwise, in scenarios where we hardly get any traffic out
 541          * on the BE queue, but there's a lot of VO traffic, we might
 542          * get stuck in a downgraded situation and flush takes forever.
 543          */
 544         struct delayed_work tx_tspec_wk;
 545 };
 546
 547 struct ieee80211_if_ibss {
 548         struct timer_list timer;
 549         struct work_struct csa_connection_drop_work;
 550
 551         unsigned long last_scan_completed;
 552
 553         u32 basic_rates;
 554
 555         bool fixed_bssid;
 556         bool fixed_channel;
 557         bool privacy;
 558
 559         bool control_port;
 560         bool userspace_handles_dfs;
 561
 562         u8 bssid[ETH_ALEN] __aligned(2);
 563         u8 ssid[IEEE80211_MAX_SSID_LEN];
 564         u8 ssid_len, ie_len;
 565         u8 *ie;
 566         struct cfg80211_chan_def chandef;
 567
 568         unsigned long ibss_join_req;
 569         /* probe response/beacon for IBSS */
 570         struct beacon_data __rcu *presp;
 571
 572         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 573         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 574
 575         spinlock_t incomplete_lock;
 576         struct list_head incomplete_stations;
 577
 578         enum {
 579                 IEEE80211_IBSS_MLME_SEARCH,
 580                 IEEE80211_IBSS_MLME_JOINED,
 581         } state;
 582 };
 583
 584 /**
 585  * struct ieee80211_if_ocb - OCB mode state
 586  *
 587  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
 588  * @wrkq_flags: OCB deferred task action
 589  * @incomplete_lock: delayed STA insertion lock
 590  * @incomplete_stations: list of STAs waiting for delayed insertion
 591  * @joined: indication if the interface is connected to an OCB network
 592  */
 593 struct ieee80211_if_ocb {
 594         struct timer_list housekeeping_timer;
 595         unsigned long wrkq_flags;
 596
 597         spinlock_t incomplete_lock;
 598         struct list_head incomplete_stations;
 599
 600         bool joined;
 601 };
 602
 603 /**
 604  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 605  *
 606  * these declarations define the interface, which enables
 607  * vendor-specific mesh synchronization
 608  *
 609  */
 610 struct ieee802_11_elems;
 611 struct ieee80211_mesh_sync_ops {
 612         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 613                              u16 stype,
 614                              struct ieee80211_mgmt *mgmt,
 615                              struct ieee802_11_elems *elems,
 616                              struct ieee80211_rx_status *rx_status);
 617
 618         /* should be called with beacon_data under RCU read lock */
 619         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata,
 620                             struct beacon_data *beacon);
 621         /* add other framework functions here */
 622 };
 623
 624 struct mesh_csa_settings {
 625         struct rcu_head rcu_head;
 626         struct cfg80211_csa_settings settings;
 627 };
 628
 629 struct ieee80211_if_mesh {
 630         struct timer_list housekeeping_timer;
 631         struct timer_list mesh_path_timer;
 632         struct timer_list mesh_path_root_timer;
 633
 634         unsigned long wrkq_flags;
 635         unsigned long mbss_changed;
 636
 637         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 638         size_t mesh_id_len;
 639         /* Active Path Selection Protocol Identifier */
 640         u8 mesh_pp_id;
 641         /* Active Path Selection Metric Identifier */
 642         u8 mesh_pm_id;
 643         /* Congestion Control Mode Identifier */
 644         u8 mesh_cc_id;
 645         /* Synchronization Protocol Identifier */
 646         u8 mesh_sp_id;
 647         /* Authentication Protocol Identifier */
 648         u8 mesh_auth_id;
 649         /* Local mesh Sequence Number */
 650         u32 sn;
 651         /* Last used PREQ ID */
 652         u32 preq_id;
 653         atomic_t mpaths;
 654         /* Timestamp of last SN update */
 655         unsigned long last_sn_update;
 656         /* Time when it's ok to send next PERR */
 657         unsigned long next_perr;
 658         /* Timestamp of last PREQ sent */
 659         unsigned long last_preq;
 660         struct mesh_rmc *rmc;
 661         spinlock_t mesh_preq_queue_lock;
 662         struct mesh_preq_queue preq_queue;
 663         int preq_queue_len;
 664         struct mesh_stats mshstats;
 665         struct mesh_config mshcfg;
 666         atomic_t estab_plinks;
 667         u32 mesh_seqnum;
 668         bool accepting_plinks;
 669         int num_gates;
 670         struct beacon_data __rcu *beacon;
 671         const u8 *ie;
 672         u8 ie_len;
 673         enum {
 674                 IEEE80211_MESH_SEC_NONE = 0x0,
 675                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 676                 IEEE80211_MESH_SEC_SECURED = 0x2,
 677         } security;
 678         bool user_mpm;
 679         /* Extensible Synchronization Framework */
 680         const struct ieee80211_mesh_sync_ops *sync_ops;
 681         s64 sync_offset_clockdrift_max;
 682         spinlock_t sync_offset_lock;
 683         bool adjusting_tbtt;
 684         /* mesh power save */
 685         enum nl80211_mesh_power_mode nonpeer_pm;
 686         int ps_peers_light_sleep;
 687         int ps_peers_deep_sleep;
 688         struct ps_data ps;
 689         /* Channel Switching Support */
 690         struct mesh_csa_settings __rcu *csa;
 691         enum {
 692                 IEEE80211_MESH_CSA_ROLE_NONE,
 693                 IEEE80211_MESH_CSA_ROLE_INIT,
 694                 IEEE80211_MESH_CSA_ROLE_REPEATER,
 695         } csa_role;
 696         u8 chsw_ttl;
 697         u16 pre_value;
 698
 699         /* offset from skb->data while building IE */
 700         int meshconf_offset;
 701 };
 702
 703 #ifdef CONFIG_MAC80211_MESH
 704 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 705         do { (msh)->mshstats.name++; } while (0)
 706 #else
 707 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 708         do { } while (0)
 709 #endif
 710
 711 /**
 712  * enum ieee80211_sub_if_data_flags - virtual interface flags
 713  *
 714  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 715  * @IEEE80211_SDATA_PROMISC: interface is promisc
 716  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 717  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 718  *      associated stations and deliver multicast frames both
 719  *      back to wireless media and to the local net stack.
 720  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 721  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 722  */
 723 enum ieee80211_sub_if_data_flags {
 724         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 725         IEEE80211_SDATA_PROMISC                 = BIT(1),
 726         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 727         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 728         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 729         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 730 };
 731
 732 /**
 733  * enum ieee80211_sdata_state_bits - virtual interface state bits
 734  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 735  *      mirrors netif_running() but is separate for interface type
 736  *      change handling while the interface is up
 737  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 738  *      mode, so queues are stopped
 739  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
 740  *      to offchannel, reset when offchannel returns
 741  */
 742 enum ieee80211_sdata_state_bits {
 743         SDATA_STATE_RUNNING,
 744         SDATA_STATE_OFFCHANNEL,
 745         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 746 };
 747
 748 /**
 749  * enum ieee80211_chanctx_mode - channel context configuration mode
 750  *
 751  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
 752  *      multiple interfaces
 753  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
 754  *      only by a single interface. This can be used for example for
 755  *      non-fixed channel IBSS.
 756  */
 757 enum ieee80211_chanctx_mode {
 758         IEEE80211_CHANCTX_SHARED,
 759         IEEE80211_CHANCTX_EXCLUSIVE
 760 };
 761
 762 /**
 763  * enum ieee80211_chanctx_replace_state - channel context replacement state
 764  *
 765  * This is used for channel context in-place reservations that require channel
 766  * context switch/swap.
 767  *
 768  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
 769  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
 770  *      by a (not yet registered) channel context pointed by %replace_ctx.
 771  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
 772  *      replaces an existing channel context pointed to by %replace_ctx.
 773  */
 774 enum ieee80211_chanctx_replace_state {
 775         IEEE80211_CHANCTX_REPLACE_NONE,
 776         IEEE80211_CHANCTX_WILL_BE_REPLACED,
 777         IEEE80211_CHANCTX_REPLACES_OTHER,
 778 };
 779
 780 struct ieee80211_chanctx {
 781         struct list_head list;
 782         struct rcu_head rcu_head;
 783
 784         struct list_head assigned_vifs;
 785         struct list_head reserved_vifs;
 786
 787         enum ieee80211_chanctx_replace_state replace_state;
 788         struct ieee80211_chanctx *replace_ctx;
 789
 790         enum ieee80211_chanctx_mode mode;
 791         bool driver_present;
 792
 793         struct ieee80211_chanctx_conf conf;
 794 };
 795
 796 struct mac80211_qos_map {
 797         struct cfg80211_qos_map qos_map;
 798         struct rcu_head rcu_head;
 799 };
 800
 801 struct ieee80211_sub_if_data {
 802         struct list_head list;
 803
 804         struct wireless_dev wdev;
 805
 806         /* keys */
 807         struct list_head key_list;
 808
 809         /* count for keys needing tailroom space allocation */
 810         int crypto_tx_tailroom_needed_cnt;
 811         int crypto_tx_tailroom_pending_dec;
 812         struct delayed_work dec_tailroom_needed_wk;
 813
 814         struct net_device *dev;
 815         struct ieee80211_local *local;
 816
 817         unsigned int flags;
 818
 819         unsigned long state;
 820
 821         int drop_unencrypted;
 822
 823         char name[IFNAMSIZ];
 824
 825         /* Fragment table for host-based reassembly */
 826         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 827         unsigned int fragment_next;
 828
 829         /* TID bitmap for NoAck policy */
 830         u16 noack_map;
 831
 832         /* bit field of ACM bits (BIT(802.1D tag)) */
 833         u8 wmm_acm;
 834
 835         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 836         struct ieee80211_key __rcu *default_unicast_key;
 837         struct ieee80211_key __rcu *default_multicast_key;
 838         struct ieee80211_key __rcu *default_mgmt_key;
 839
 840         u16 sequence_number;
 841         __be16 control_port_protocol;
 842         bool control_port_no_encrypt;
 843         int encrypt_headroom;
 844
 845         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 846         struct mac80211_qos_map __rcu *qos_map;
 847
 848         struct work_struct csa_finalize_work;
 849         bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
 850         struct cfg80211_chan_def csa_chandef;
 851
 852         struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
 853         struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
 854
 855         /* context reservation -- protected with chanctx_mtx */
 856         struct ieee80211_chanctx *reserved_chanctx;
 857         struct cfg80211_chan_def reserved_chandef;
 858         bool reserved_radar_required;
 859         bool reserved_ready;
 860
 861         /* used to reconfigure hardware SM PS */
 862         struct work_struct recalc_smps;
 863
 864         struct work_struct work;
 865         struct sk_buff_head skb_queue;
 866
 867         u8 needed_rx_chains;
 868         enum ieee80211_smps_mode smps_mode;
 869
 870         int user_power_level; /* in dBm */
 871         int ap_power_level; /* in dBm */
 872
 873         bool radar_required;
 874         struct delayed_work dfs_cac_timer_work;
 875
 876         /*
 877          * AP this belongs to: self in AP mode and
 878          * corresponding AP in VLAN mode, NULL for
 879          * all others (might be needed later in IBSS)
 880          */
 881         struct ieee80211_if_ap *bss;
 882
 883         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 884         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 885
 886         bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
 887         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 888
 889         union {
 890                 struct ieee80211_if_ap ap;
 891                 struct ieee80211_if_wds wds;
 892                 struct ieee80211_if_vlan vlan;
 893                 struct ieee80211_if_managed mgd;
 894                 struct ieee80211_if_ibss ibss;
 895                 struct ieee80211_if_mesh mesh;
 896                 struct ieee80211_if_ocb ocb;
 897                 u32 mntr_flags;
 898         } u;
 899
 900 #ifdef CONFIG_MAC80211_DEBUGFS
 901         struct {
 902                 struct dentry *subdir_stations;
 903                 struct dentry *default_unicast_key;
 904                 struct dentry *default_multicast_key;
 905                 struct dentry *default_mgmt_key;
 906         } debugfs;
 907 #endif
 908
 909         /* must be last, dynamically sized area in this! */
 910         struct ieee80211_vif vif;
 911 };
 912
 913 static inline
 914 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 915 {
 916         return container_of(p, struct ieee80211_sub_if_data, vif);
 917 }
 918
 919 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
 920         __acquires(&sdata->wdev.mtx)
 921 {
 922         mutex_lock(&sdata->wdev.mtx);
 923         __acquire(&sdata->wdev.mtx);
 924 }
 925
 926 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
 927         __releases(&sdata->wdev.mtx)
 928 {
 929         mutex_unlock(&sdata->wdev.mtx);
 930         __release(&sdata->wdev.mtx);
 931 }
 932
 933 #define sdata_dereference(p, sdata) \
 934         rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
 935
 936 static inline void
 937 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
 938 {
 939         lockdep_assert_held(&sdata->wdev.mtx);
 940 }
 941
 942 static inline enum ieee80211_band
 943 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
 944 {
 945         enum ieee80211_band band = IEEE80211_BAND_2GHZ;
 946         struct ieee80211_chanctx_conf *chanctx_conf;
 947
 948         rcu_read_lock();
 949         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 950         if (!WARN_ON(!chanctx_conf))
 951                 band = chanctx_conf->def.chan->band;
 952         rcu_read_unlock();
 953
 954         return band;
 955 }
 956
 957 static inline int
 958 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
 959 {
 960         switch (chandef->width) {
 961         case NL80211_CHAN_WIDTH_5:
 962                 return 2;
 963         case NL80211_CHAN_WIDTH_10:
 964                 return 1;
 965         default:
 966                 return 0;
 967         }
 968 }
 969
 970 static inline int
 971 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
 972 {
 973         struct ieee80211_chanctx_conf *chanctx_conf;
 974         int shift = 0;
 975
 976         rcu_read_lock();
 977         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 978         if (chanctx_conf)
 979                 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
 980         rcu_read_unlock();
 981
 982         return shift;
 983 }
 984
 985 struct ieee80211_rx_agg {
 986         u8 addr[ETH_ALEN];
 987         u16 tid;
 988 };
 989
 990 enum sdata_queue_type {
 991         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 992         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 993         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 994         IEEE80211_SDATA_QUEUE_RX_AGG_START      = 3,
 995         IEEE80211_SDATA_QUEUE_RX_AGG_STOP       = 4,
 996 };
 997
 998 enum {
 999         IEEE80211_RX_MSG        = 1,
1000         IEEE80211_TX_STATUS_MSG = 2,
1001 };
1002
1003 enum queue_stop_reason {
1004         IEEE80211_QUEUE_STOP_REASON_DRIVER,
1005         IEEE80211_QUEUE_STOP_REASON_PS,
1006         IEEE80211_QUEUE_STOP_REASON_CSA,
1007         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1008         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1009         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1010         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1011         IEEE80211_QUEUE_STOP_REASON_FLUSH,
1012         IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1013
1014         IEEE80211_QUEUE_STOP_REASONS,
1015 };
1016
1017 #ifdef CONFIG_MAC80211_LEDS
1018 struct tpt_led_trigger {
1019         struct led_trigger trig;
1020         char name[32];
1021         const struct ieee80211_tpt_blink *blink_table;
1022         unsigned int blink_table_len;
1023         struct timer_list timer;
1024         unsigned long prev_traffic;
1025         unsigned long tx_bytes, rx_bytes;
1026         unsigned int active, want;
1027         bool running;
1028 };
1029 #endif
1030
1031 /*
1032  * struct ieee80211_tx_latency_bin_ranges - Tx latency statistics bins ranges
1033  *
1034  * Measuring Tx latency statistics. Counts how many Tx frames transmitted in a
1035  * certain latency range (in Milliseconds). Each station that uses these
1036  * ranges will have bins to count the amount of frames received in that range.
1037  * The user can configure the ranges via debugfs.
1038  * If ranges is NULL then Tx latency statistics bins are disabled for all
1039  * stations.
1040  *
1041  * @n_ranges: number of ranges that are taken in account
1042  * @ranges: the ranges that the user requested or NULL if disabled.
1043  */
1044 struct ieee80211_tx_latency_bin_ranges {
1045         int n_ranges;
1046         u32 ranges[];
1047 };
1048
1049 /**
1050  * mac80211 scan flags - currently active scan mode
1051  *
1052  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1053  *      well be on the operating channel
1054  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1055  *      determine if we are on the operating channel or not
1056  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1057  *      channel. This should not interrupt normal traffic.
1058  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1059  *      that the scan completed.
1060  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1061  *      a scan complete for an aborted scan.
1062  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1063  *      cancelled.
1064  */
1065 enum {
1066         SCAN_SW_SCANNING,
1067         SCAN_HW_SCANNING,
1068         SCAN_ONCHANNEL_SCANNING,
1069         SCAN_COMPLETED,
1070         SCAN_ABORTED,
1071         SCAN_HW_CANCELLED,
1072 };
1073
1074 /**
1075  * enum mac80211_scan_state - scan state machine states
1076  *
1077  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1078  *      determines if we should keep on scanning or switch back to the
1079  *      operating channel
1080  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1081  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1082  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1083  *      send out data
1084  * @SCAN_RESUME: Resume the scan and scan the next channel
1085  * @SCAN_ABORT: Abort the scan and go back to operating channel
1086  */
1087 enum mac80211_scan_state {
1088         SCAN_DECISION,
1089         SCAN_SET_CHANNEL,
1090         SCAN_SEND_PROBE,
1091         SCAN_SUSPEND,
1092         SCAN_RESUME,
1093         SCAN_ABORT,
1094 };
1095
1096 struct ieee80211_local {
1097         /* embed the driver visible part.
1098          * don't cast (use the static inlines below), but we keep
1099          * it first anyway so they become a no-op */
1100         struct ieee80211_hw hw;
1101
1102         const struct ieee80211_ops *ops;
1103
1104         /*
1105          * private workqueue to mac80211. mac80211 makes this accessible
1106          * via ieee80211_queue_work()
1107          */
1108         struct workqueue_struct *workqueue;
1109
1110         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1111         int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1112         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1113         spinlock_t queue_stop_reason_lock;
1114
1115         int open_count;
1116         int monitors, cooked_mntrs;
1117         /* number of interfaces with corresponding FIF_ flags */
1118         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1119             fif_probe_req;
1120         int probe_req_reg;
1121         unsigned int filter_flags; /* FIF_* */
1122
1123         bool wiphy_ciphers_allocated;
1124
1125         bool use_chanctx;
1126
1127         /* protects the aggregated multicast list and filter calls */
1128         spinlock_t filter_lock;
1129
1130         /* used for uploading changed mc list */
1131         struct work_struct reconfig_filter;
1132
1133         /* aggregated multicast list */
1134         struct netdev_hw_addr_list mc_list;
1135
1136         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1137
1138         /*
1139          * suspended is true if we finished all the suspend _and_ we have
1140          * not yet come up from resume. This is to be used by mac80211
1141          * to ensure driver sanity during suspend and mac80211's own
1142          * sanity. It can eventually be used for WoW as well.
1143          */
1144         bool suspended;
1145
1146         /*
1147          * Resuming is true while suspended, but when we're reprogramming the
1148          * hardware -- at that time it's allowed to use ieee80211_queue_work()
1149          * again even though some other parts of the stack are still suspended
1150          * and we still drop received frames to avoid waking the stack.
1151          */
1152         bool resuming;
1153
1154         /*
1155          * quiescing is true during the suspend process _only_ to
1156          * ease timer cancelling etc.
1157          */
1158         bool quiescing;
1159
1160         /* device is started */
1161         bool started;
1162
1163         /* device is during a HW reconfig */
1164         bool in_reconfig;
1165
1166         /* wowlan is enabled -- don't reconfig on resume */
1167         bool wowlan;
1168
1169         /* DFS/radar detection is enabled */
1170         bool radar_detect_enabled;
1171         struct work_struct radar_detected_work;
1172
1173         /* number of RX chains the hardware has */
1174         u8 rx_chains;
1175
1176         int tx_headroom; /* required headroom for hardware/radiotap */
1177
1178         /* Tasklet and skb queue to process calls from IRQ mode. All frames
1179          * added to skb_queue will be processed, but frames in
1180          * skb_queue_unreliable may be dropped if the total length of these
1181          * queues increases over the limit. */
1182 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1183         struct tasklet_struct tasklet;
1184         struct sk_buff_head skb_queue;
1185         struct sk_buff_head skb_queue_unreliable;
1186
1187         spinlock_t rx_path_lock;
1188
1189         /* Station data */
1190         /*
1191          * The mutex only protects the list, hash table and
1192          * counter, reads are done with RCU.
1193          */
1194         struct mutex sta_mtx;
1195         spinlock_t tim_lock;
1196         unsigned long num_sta;
1197         struct list_head sta_list;
1198         struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
1199         struct timer_list sta_cleanup;
1200         int sta_generation;
1201
1202         /*
1203          * Tx latency statistics parameters for all stations.
1204          * Can enable via debugfs (NULL when disabled).
1205          */
1206         struct ieee80211_tx_latency_bin_ranges __rcu *tx_latency;
1207
1208         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1209         struct tasklet_struct tx_pending_tasklet;
1210
1211         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1212
1213         /* number of interfaces with corresponding IFF_ flags */
1214         atomic_t iff_allmultis, iff_promiscs;
1215
1216         struct rate_control_ref *rate_ctrl;
1217
1218         struct crypto_cipher *wep_tx_tfm;
1219         struct crypto_cipher *wep_rx_tfm;
1220         u32 wep_iv;
1221
1222         /* see iface.c */
1223         struct list_head interfaces;
1224         struct mutex iflist_mtx;
1225
1226         /*
1227          * Key mutex, protects sdata's key_list and sta_info's
1228          * key pointers (write access, they're RCU.)
1229          */
1230         struct mutex key_mtx;
1231
1232         /* mutex for scan and work locking */
1233         struct mutex mtx;
1234
1235         /* Scanning and BSS list */
1236         unsigned long scanning;
1237         struct cfg80211_ssid scan_ssid;
1238         struct cfg80211_scan_request *int_scan_req;
1239         struct cfg80211_scan_request *scan_req;
1240         struct ieee80211_scan_request *hw_scan_req;
1241         struct cfg80211_chan_def scan_chandef;
1242         enum ieee80211_band hw_scan_band;
1243         int scan_channel_idx;
1244         int scan_ies_len;
1245         int hw_scan_ies_bufsize;
1246
1247         struct work_struct sched_scan_stopped_work;
1248         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1249         struct cfg80211_sched_scan_request *sched_scan_req;
1250
1251         unsigned long leave_oper_channel_time;
1252         enum mac80211_scan_state next_scan_state;
1253         struct delayed_work scan_work;
1254         struct ieee80211_sub_if_data __rcu *scan_sdata;
1255         /* For backward compatibility only -- do not use */
1256         struct cfg80211_chan_def _oper_chandef;
1257
1258         /* Temporary remain-on-channel for off-channel operations */
1259         struct ieee80211_channel *tmp_channel;
1260
1261         /* channel contexts */
1262         struct list_head chanctx_list;
1263         struct mutex chanctx_mtx;
1264
1265         /* SNMP counters */
1266         /* dot11CountersTable */
1267         u32 dot11TransmittedFragmentCount;
1268         u32 dot11MulticastTransmittedFrameCount;
1269         u32 dot11FailedCount;
1270         u32 dot11RetryCount;
1271         u32 dot11MultipleRetryCount;
1272         u32 dot11FrameDuplicateCount;
1273         u32 dot11ReceivedFragmentCount;
1274         u32 dot11MulticastReceivedFrameCount;
1275         u32 dot11TransmittedFrameCount;
1276
1277 #ifdef CONFIG_MAC80211_LEDS
1278         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
1279         struct tpt_led_trigger *tpt_led_trigger;
1280         char tx_led_name[32], rx_led_name[32],
1281              assoc_led_name[32], radio_led_name[32];
1282 #endif
1283
1284 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1285         /* TX/RX handler statistics */
1286         unsigned int tx_handlers_drop;
1287         unsigned int tx_handlers_queued;
1288         unsigned int tx_handlers_drop_unencrypted;
1289         unsigned int tx_handlers_drop_fragment;
1290         unsigned int tx_handlers_drop_wep;
1291         unsigned int tx_handlers_drop_not_assoc;
1292         unsigned int tx_handlers_drop_unauth_port;
1293         unsigned int rx_handlers_drop;
1294         unsigned int rx_handlers_queued;
1295         unsigned int rx_handlers_drop_nullfunc;
1296         unsigned int rx_handlers_drop_defrag;
1297         unsigned int rx_handlers_drop_short;
1298         unsigned int tx_expand_skb_head;
1299         unsigned int tx_expand_skb_head_cloned;
1300         unsigned int rx_expand_skb_head;
1301         unsigned int rx_expand_skb_head2;
1302         unsigned int rx_handlers_fragments;
1303         unsigned int tx_status_drop;
1304 #define I802_DEBUG_INC(c) (c)++
1305 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1306 #define I802_DEBUG_INC(c) do { } while (0)
1307 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1308
1309
1310         int total_ps_buffered; /* total number of all buffered unicast and
1311                                 * multicast packets for power saving stations
1312                                 */
1313
1314         bool pspolling;
1315         bool offchannel_ps_enabled;
1316         /*
1317          * PS can only be enabled when we have exactly one managed
1318          * interface (and monitors) in PS, this then points there.
1319          */
1320         struct ieee80211_sub_if_data *ps_sdata;
1321         struct work_struct dynamic_ps_enable_work;
1322         struct work_struct dynamic_ps_disable_work;
1323         struct timer_list dynamic_ps_timer;
1324         struct notifier_block network_latency_notifier;
1325         struct notifier_block ifa_notifier;
1326         struct notifier_block ifa6_notifier;
1327
1328         /*
1329          * The dynamic ps timeout configured from user space via WEXT -
1330          * this will override whatever chosen by mac80211 internally.
1331          */
1332         int dynamic_ps_forced_timeout;
1333
1334         int user_power_level; /* in dBm, for all interfaces */
1335
1336         enum ieee80211_smps_mode smps_mode;
1337
1338         struct work_struct restart_work;
1339
1340 #ifdef CONFIG_MAC80211_DEBUGFS
1341         struct local_debugfsdentries {
1342                 struct dentry *rcdir;
1343                 struct dentry *keys;
1344         } debugfs;
1345 #endif
1346
1347         /*
1348          * Remain-on-channel support
1349          */
1350         struct list_head roc_list;
1351         struct work_struct hw_roc_start, hw_roc_done;
1352         unsigned long hw_roc_start_time;
1353         u64 roc_cookie_counter;
1354
1355         struct idr ack_status_frames;
1356         spinlock_t ack_status_lock;
1357
1358         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1359
1360         struct napi_struct *napi;
1361
1362         /* virtual monitor interface */
1363         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1364         struct cfg80211_chan_def monitor_chandef;
1365
1366         /* extended capabilities provided by mac80211 */
1367         u8 ext_capa[8];
1368 };
1369
1370 static inline struct ieee80211_sub_if_data *
1371 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1372 {
1373         return netdev_priv(dev);
1374 }
1375
1376 static inline struct ieee80211_sub_if_data *
1377 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1378 {
1379         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1380 }
1381
1382 /* this struct represents 802.11n's RA/TID combination */
1383 struct ieee80211_ra_tid {
1384         u8 ra[ETH_ALEN];
1385         u16 tid;
1386 };
1387
1388 /* this struct holds the value parsing from channel switch IE  */
1389 struct ieee80211_csa_ie {
1390         struct cfg80211_chan_def chandef;
1391         u8 mode;
1392         u8 count;
1393         u8 ttl;
1394         u16 pre_value;
1395 };
1396
1397 /* Parsed Information Elements */
1398 struct ieee802_11_elems {
1399         const u8 *ie_start;
1400         size_t total_len;
1401
1402         /* pointers to IEs */
1403         const u8 *ext_capab;
1404         const u8 *ssid;
1405         const u8 *supp_rates;
1406         const u8 *ds_params;
1407         const struct ieee80211_tim_ie *tim;
1408         const u8 *challenge;
1409         const u8 *rsn;
1410         const u8 *erp_info;
1411         const u8 *ext_supp_rates;
1412         const u8 *wmm_info;
1413         const u8 *wmm_param;
1414         const struct ieee80211_ht_cap *ht_cap_elem;
1415         const struct ieee80211_ht_operation *ht_operation;
1416         const struct ieee80211_vht_cap *vht_cap_elem;
1417         const struct ieee80211_vht_operation *vht_operation;
1418         const struct ieee80211_meshconf_ie *mesh_config;
1419         const u8 *mesh_id;
1420         const u8 *peering;
1421         const __le16 *awake_window;
1422         const u8 *preq;
1423         const u8 *prep;
1424         const u8 *perr;
1425         const struct ieee80211_rann_ie *rann;
1426         const struct ieee80211_channel_sw_ie *ch_switch_ie;
1427         const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1428         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1429         const u8 *country_elem;
1430         const u8 *pwr_constr_elem;
1431         const u8 *cisco_dtpc_elem;
1432         const struct ieee80211_timeout_interval_ie *timeout_int;
1433         const u8 *opmode_notif;
1434         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1435         const struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1436
1437         /* length of them, respectively */
1438         u8 ext_capab_len;
1439         u8 ssid_len;
1440         u8 supp_rates_len;
1441         u8 tim_len;
1442         u8 challenge_len;
1443         u8 rsn_len;
1444         u8 ext_supp_rates_len;
1445         u8 wmm_info_len;
1446         u8 wmm_param_len;
1447         u8 mesh_id_len;
1448         u8 peering_len;
1449         u8 preq_len;
1450         u8 prep_len;
1451         u8 perr_len;
1452         u8 country_elem_len;
1453
1454         /* whether a parse error occurred while retrieving these elements */
1455         bool parse_error;
1456 };
1457
1458 static inline struct ieee80211_local *hw_to_local(
1459         struct ieee80211_hw *hw)
1460 {
1461         return container_of(hw, struct ieee80211_local, hw);
1462 }
1463
1464
1465 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1466 {
1467         return ether_addr_equal(raddr, addr) ||
1468                is_broadcast_ether_addr(raddr);
1469 }
1470
1471 static inline bool
1472 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1473 {
1474         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1475                      status->flag & RX_FLAG_MACTIME_END);
1476         return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1477 }
1478
1479 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1480                                      struct ieee80211_rx_status *status,
1481                                      unsigned int mpdu_len,
1482                                      unsigned int mpdu_offset);
1483 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1484 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1485 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1486                                       u32 changed);
1487 void ieee80211_configure_filter(struct ieee80211_local *local);
1488 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1489
1490 /* STA code */
1491 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1492 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1493                        struct cfg80211_auth_request *req);
1494 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1495                         struct cfg80211_assoc_request *req);
1496 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1497                          struct cfg80211_deauth_request *req);
1498 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1499                            struct cfg80211_disassoc_request *req);
1500 void ieee80211_send_pspoll(struct ieee80211_local *local,
1501                            struct ieee80211_sub_if_data *sdata);
1502 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1503 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1504 int ieee80211_max_network_latency(struct notifier_block *nb,
1505                                   unsigned long data, void *dummy);
1506 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1507 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1508 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1509                                   struct sk_buff *skb);
1510 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1511 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1512 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1513 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1514                                   __le16 fc, bool acked);
1515 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1516 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1517 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1518
1519 /* IBSS code */
1520 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1521 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1522 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1523                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1524 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1525                         struct cfg80211_ibss_params *params);
1526 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1527 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1528 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1529                                    struct sk_buff *skb);
1530 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1531                               struct cfg80211_csa_settings *csa_settings);
1532 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1533 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1534
1535 /* OCB code */
1536 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1537 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1538                              const u8 *bssid, const u8 *addr, u32 supp_rates);
1539 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1540 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1541                        struct ocb_setup *setup);
1542 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1543
1544 /* mesh code */
1545 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1546 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1547                                    struct sk_buff *skb);
1548 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1549                               struct cfg80211_csa_settings *csa_settings);
1550 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1551
1552 /* scan/BSS handling */
1553 void ieee80211_scan_work(struct work_struct *work);
1554 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1555                                 const u8 *ssid, u8 ssid_len,
1556                                 struct ieee80211_channel *chan,
1557                                 enum nl80211_bss_scan_width scan_width);
1558 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1559                            struct cfg80211_scan_request *req);
1560 void ieee80211_scan_cancel(struct ieee80211_local *local);
1561 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1562 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1563
1564 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1565 struct ieee80211_bss *
1566 ieee80211_bss_info_update(struct ieee80211_local *local,
1567                           struct ieee80211_rx_status *rx_status,
1568                           struct ieee80211_mgmt *mgmt,
1569                           size_t len,
1570                           struct ieee802_11_elems *elems,
1571                           struct ieee80211_channel *channel);
1572 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1573                           struct ieee80211_bss *bss);
1574
1575 /* scheduled scan handling */
1576 int
1577 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1578                                      struct cfg80211_sched_scan_request *req);
1579 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1580                                        struct cfg80211_sched_scan_request *req);
1581 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1582 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1583 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1584
1585 /* off-channel helpers */
1586 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1587 void ieee80211_offchannel_return(struct ieee80211_local *local);
1588 void ieee80211_roc_setup(struct ieee80211_local *local);
1589 void ieee80211_start_next_roc(struct ieee80211_local *local);
1590 void ieee80211_roc_purge(struct ieee80211_local *local,
1591                          struct ieee80211_sub_if_data *sdata);
1592 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
1593 void ieee80211_sw_roc_work(struct work_struct *work);
1594 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1595
1596 /* channel switch handling */
1597 void ieee80211_csa_finalize_work(struct work_struct *work);
1598 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1599                              struct cfg80211_csa_settings *params);
1600
1601 /* interface handling */
1602 int ieee80211_iface_init(void);
1603 void ieee80211_iface_exit(void);
1604 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1605                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1606                      struct vif_params *params);
1607 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1608                              enum nl80211_iftype type);
1609 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1610 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1611 u32 ieee80211_idle_off(struct ieee80211_local *local);
1612 void ieee80211_recalc_idle(struct ieee80211_local *local);
1613 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1614                                     const int offset);
1615 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1616 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1617 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1618 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1619
1620 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1621 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1622
1623 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1624 {
1625         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1626 }
1627
1628 /* tx handling */
1629 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1630 void ieee80211_tx_pending(unsigned long data);
1631 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1632                                          struct net_device *dev);
1633 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1634                                        struct net_device *dev);
1635 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
1636                                   struct net_device *dev,
1637                                   u32 info_flags);
1638 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1639                               struct sk_buff_head *skbs);
1640 struct sk_buff *
1641 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
1642                               struct sk_buff *skb, u32 info_flags);
1643
1644 /* HT */
1645 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1646                                      struct ieee80211_sta_ht_cap *ht_cap);
1647 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1648                                        struct ieee80211_supported_band *sband,
1649                                        const struct ieee80211_ht_cap *ht_cap_ie,
1650                                        struct sta_info *sta);
1651 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1652                           const u8 *da, u16 tid,
1653                           u16 initiator, u16 reason_code);
1654 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1655                                enum ieee80211_smps_mode smps, const u8 *da,
1656                                const u8 *bssid);
1657 void ieee80211_request_smps_ap_work(struct work_struct *work);
1658 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1659 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1660                                    enum ieee80211_smps_mode smps_mode_new);
1661
1662 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1663                                      u16 initiator, u16 reason, bool stop);
1664 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1665                                     u16 initiator, u16 reason, bool stop);
1666 void __ieee80211_start_rx_ba_session(struct sta_info *sta,
1667                                      u8 dialog_token, u16 timeout,
1668                                      u16 start_seq_num, u16 ba_policy, u16 tid,
1669                                      u16 buf_size, bool tx, bool auto_seq);
1670 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1671                                          enum ieee80211_agg_stop_reason reason);
1672 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1673                              struct sta_info *sta,
1674                              struct ieee80211_mgmt *mgmt, size_t len);
1675 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1676                                   struct sta_info *sta,
1677                                   struct ieee80211_mgmt *mgmt,
1678                                   size_t len);
1679 void ieee80211_process_addba_request(struct ieee80211_local *local,
1680                                      struct sta_info *sta,
1681                                      struct ieee80211_mgmt *mgmt,
1682                                      size_t len);
1683
1684 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1685                                    enum ieee80211_agg_stop_reason reason);
1686 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1687                                     enum ieee80211_agg_stop_reason reason);
1688 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1689 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1690 void ieee80211_ba_session_work(struct work_struct *work);
1691 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1692 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1693
1694 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1695
1696 /* VHT */
1697 void
1698 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1699                                     struct ieee80211_supported_band *sband,
1700                                     const struct ieee80211_vht_cap *vht_cap_ie,
1701                                     struct sta_info *sta);
1702 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1703 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1704 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1705                                   struct sta_info *sta, u8 opmode,
1706                                   enum ieee80211_band band, bool nss_only);
1707 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1708                                  struct sta_info *sta, u8 opmode,
1709                                  enum ieee80211_band band, bool nss_only);
1710 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1711                                       struct ieee80211_sta_vht_cap *vht_cap);
1712
1713 /* Spectrum management */
1714 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1715                                        struct ieee80211_mgmt *mgmt,
1716                                        size_t len);
1717 /**
1718  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1719  * @sdata: the sdata of the interface which has received the frame
1720  * @elems: parsed 802.11 elements received with the frame
1721  * @beacon: indicates if the frame was a beacon or probe response
1722  * @current_band: indicates the current band
1723  * @sta_flags: contains information about own capabilities and restrictions
1724  *      to decide which channel switch announcements can be accepted. Only the
1725  *      following subset of &enum ieee80211_sta_flags are evaluated:
1726  *      %IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1727  *      %IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1728  *      %IEEE80211_STA_DISABLE_160MHZ.
1729  * @bssid: the currently connected bssid (for reporting)
1730  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1731         All of them will be filled with if success only.
1732  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1733  */
1734 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1735                                  struct ieee802_11_elems *elems, bool beacon,
1736                                  enum ieee80211_band current_band,
1737                                  u32 sta_flags, u8 *bssid,
1738                                  struct ieee80211_csa_ie *csa_ie);
1739
1740 /* Suspend/resume and hw reconfiguration */
1741 int ieee80211_reconfig(struct ieee80211_local *local);
1742 void ieee80211_stop_device(struct ieee80211_local *local);
1743
1744 int __ieee80211_suspend(struct ieee80211_hw *hw,
1745                         struct cfg80211_wowlan *wowlan);
1746
1747 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1748 {
1749         struct ieee80211_local *local = hw_to_local(hw);
1750
1751         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1752                 "%s: resume with hardware scan still in progress\n",
1753                 wiphy_name(hw->wiphy));
1754
1755         return ieee80211_reconfig(hw_to_local(hw));
1756 }
1757
1758 /* utility functions/constants */
1759 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1760 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1761                         enum nl80211_iftype type);
1762 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1763                              int rate, int erp, int short_preamble,
1764                              int shift);
1765 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1766                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1767                                      gfp_t gfp);
1768 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1769                                bool bss_notify);
1770 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1771
1772 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1773                                  struct sk_buff *skb, int tid,
1774                                  enum ieee80211_band band);
1775
1776 static inline void
1777 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1778                           struct sk_buff *skb, int tid,
1779                           enum ieee80211_band band)
1780 {
1781         rcu_read_lock();
1782         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1783         rcu_read_unlock();
1784 }
1785
1786 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1787                                         struct sk_buff *skb, int tid)
1788 {
1789         struct ieee80211_chanctx_conf *chanctx_conf;
1790
1791         rcu_read_lock();
1792         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1793         if (WARN_ON(!chanctx_conf)) {
1794                 rcu_read_unlock();
1795                 kfree_skb(skb);
1796                 return;
1797         }
1798
1799         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1800                                     chanctx_conf->def.chan->band);
1801         rcu_read_unlock();
1802 }
1803
1804 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1805                                     struct sk_buff *skb)
1806 {
1807         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1808         ieee80211_tx_skb_tid(sdata, skb, 7);
1809 }
1810
1811 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1812                                struct ieee802_11_elems *elems,
1813                                u64 filter, u32 crc);
1814 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1815                                           bool action,
1816                                           struct ieee802_11_elems *elems)
1817 {
1818         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1819 }
1820
1821 static inline bool ieee80211_rx_reorder_ready(struct sk_buff_head *frames)
1822 {
1823         struct sk_buff *tail = skb_peek_tail(frames);
1824         struct ieee80211_rx_status *status;
1825
1826         if (!tail)
1827                 return false;
1828
1829         status = IEEE80211_SKB_RXCB(tail);
1830         if (status->flag & RX_FLAG_AMSDU_MORE)
1831                 return false;
1832
1833         return true;
1834 }
1835
1836 extern const int ieee802_1d_to_ac[8];
1837
1838 static inline int ieee80211_ac_from_tid(int tid)
1839 {
1840         return ieee802_1d_to_ac[tid & 7];
1841 }
1842
1843 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1844 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1845 void ieee80211_dynamic_ps_timer(unsigned long data);
1846 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1847                              struct ieee80211_sub_if_data *sdata,
1848                              int powersave);
1849 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1850                              struct ieee80211_hdr *hdr);
1851 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1852                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
1853
1854 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1855                                      unsigned long queues,
1856                                      enum queue_stop_reason reason,
1857                                      bool refcounted);
1858 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
1859                                struct ieee80211_sub_if_data *sdata,
1860                                enum queue_stop_reason reason);
1861 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
1862                                struct ieee80211_sub_if_data *sdata,
1863                                enum queue_stop_reason reason);
1864 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1865                                      unsigned long queues,
1866                                      enum queue_stop_reason reason,
1867                                      bool refcounted);
1868 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1869                                     enum queue_stop_reason reason,
1870                                     bool refcounted);
1871 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1872                                     enum queue_stop_reason reason,
1873                                     bool refcounted);
1874 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1875 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1876                                struct sk_buff *skb);
1877 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1878                                 struct sk_buff_head *skbs);
1879 void ieee80211_flush_queues(struct ieee80211_local *local,
1880                             struct ieee80211_sub_if_data *sdata);
1881
1882 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1883                          u16 transaction, u16 auth_alg, u16 status,
1884                          const u8 *extra, size_t extra_len, const u8 *bssid,
1885                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1886                          u32 tx_flags);
1887 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1888                                     const u8 *bssid, u16 stype, u16 reason,
1889                                     bool send_frame, u8 *frame_buf);
1890 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1891                              size_t buffer_len,
1892                              struct ieee80211_scan_ies *ie_desc,
1893                              const u8 *ie, size_t ie_len,
1894                              u8 bands_used, u32 *rate_masks,
1895                              struct cfg80211_chan_def *chandef);
1896 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1897                                           u8 *dst, u32 ratemask,
1898                                           struct ieee80211_channel *chan,
1899                                           const u8 *ssid, size_t ssid_len,
1900                                           const u8 *ie, size_t ie_len,
1901                                           bool directed);
1902 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1903                               const u8 *ssid, size_t ssid_len,
1904                               const u8 *ie, size_t ie_len,
1905                               u32 ratemask, bool directed, u32 tx_flags,
1906                               struct ieee80211_channel *channel, bool scan);
1907
1908 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1909                             struct ieee802_11_elems *elems,
1910                             enum ieee80211_band band, u32 *basic_rates);
1911 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
1912                                  enum ieee80211_smps_mode smps_mode);
1913 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
1914                                 enum ieee80211_smps_mode smps_mode);
1915 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1916 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
1917
1918 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1919                               const u8 *ids, int n_ids,
1920                               const u8 *after_ric, int n_after_ric,
1921                               size_t offset);
1922 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1923 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1924                               u16 cap);
1925 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1926                                const struct cfg80211_chan_def *chandef,
1927                                u16 prot_mode);
1928 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1929                                u32 cap);
1930 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
1931                              const struct ieee80211_supported_band *sband,
1932                              const u8 *srates, int srates_len, u32 *rates);
1933 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1934                             struct sk_buff *skb, bool need_basic,
1935                             enum ieee80211_band band);
1936 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1937                                 struct sk_buff *skb, bool need_basic,
1938                                 enum ieee80211_band band);
1939 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
1940
1941 /* channel management */
1942 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1943                                   const struct ieee80211_ht_operation *ht_oper,
1944                                   struct cfg80211_chan_def *chandef);
1945 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
1946
1947 int __must_check
1948 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1949                           const struct cfg80211_chan_def *chandef,
1950                           enum ieee80211_chanctx_mode mode);
1951 int __must_check
1952 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
1953                               const struct cfg80211_chan_def *chandef,
1954                               enum ieee80211_chanctx_mode mode,
1955                               bool radar_required);
1956 int __must_check
1957 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
1958 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
1959
1960 int __must_check
1961 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
1962                                const struct cfg80211_chan_def *chandef,
1963                                u32 *changed);
1964 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
1965 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
1966 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
1967                                          bool clear);
1968 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
1969                                struct ieee80211_chanctx *ctx);
1970
1971 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
1972                                    struct ieee80211_chanctx *chanctx);
1973 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
1974                                       struct ieee80211_chanctx *ctx);
1975
1976 void ieee80211_dfs_cac_timer(unsigned long data);
1977 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
1978 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
1979 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
1980 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
1981                               struct cfg80211_csa_settings *csa_settings);
1982
1983 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
1984 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
1985 const struct ieee80211_cipher_scheme *
1986 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
1987                  enum nl80211_iftype iftype);
1988 int ieee80211_cs_headroom(struct ieee80211_local *local,
1989                           struct cfg80211_crypto_settings *crypto,
1990                           enum nl80211_iftype iftype);
1991 void ieee80211_recalc_dtim(struct ieee80211_local *local,
1992                            struct ieee80211_sub_if_data *sdata);
1993 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
1994                                  const struct cfg80211_chan_def *chandef,
1995                                  enum ieee80211_chanctx_mode chanmode,
1996                                  u8 radar_detect);
1997 int ieee80211_max_num_channels(struct ieee80211_local *local);
1998
1999 /* TDLS */
2000 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2001                         const u8 *peer, u8 action_code, u8 dialog_token,
2002                         u16 status_code, u32 peer_capability,
2003                         bool initiator, const u8 *extra_ies,
2004                         size_t extra_ies_len);
2005 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2006                         const u8 *peer, enum nl80211_tdls_operation oper);
2007 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2008
2009 extern const struct ethtool_ops ieee80211_ethtool_ops;
2010
2011 #ifdef CONFIG_MAC80211_NOINLINE
2012 #define debug_noinline noinline
2013 #else
2014 #define debug_noinline
2015 #endif
2016
2017 #endif /* IEEE80211_I_H */