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 <linux/rhashtable.h>
  30 #include <net/ieee80211_radiotap.h>
  31 #include <net/cfg80211.h>
  32 #include <net/mac80211.h>
  33 #include "key.h"
  34 #include "sta_info.h"
  35 #include "debug.h"
  36
  37 struct ieee80211_local;
  38
  39 /* Maximum number of broadcast/multicast frames to buffer when some of the
  40  * associated stations are using power saving. */
  41 #define AP_MAX_BC_BUFFER 128
  42
  43 /* Maximum number of frames buffered to all STAs, including multicast frames.
  44  * Note: increasing this limit increases the potential memory requirement. Each
  45  * frame can be up to about 2 kB long. */
  46 #define TOTAL_MAX_TX_BUFFER 512
  47
  48 /* Required encryption head and tailroom */
  49 #define IEEE80211_ENCRYPT_HEADROOM 8
  50 #define IEEE80211_ENCRYPT_TAILROOM 18
  51
  52 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  53  * reception of at least three fragmented frames. This limit can be increased
  54  * by changing this define, at the cost of slower frame reassembly and
  55  * increased memory use (about 2 kB of RAM per entry). */
  56 #define IEEE80211_FRAGMENT_MAX 4
  57
  58 /* power level hasn't been configured (or set to automatic) */
  59 #define IEEE80211_UNSET_POWER_LEVEL     INT_MIN
  60
  61 /*
  62  * Some APs experience problems when working with U-APSD. Decreasing the
  63  * probability of that happening by using legacy mode for all ACs but VO isn't
  64  * enough.
  65  *
  66  * Cisco 4410N originally forced us to enable VO by default only because it
  67  * treated non-VO ACs as legacy.
  68  *
  69  * However some APs (notably Netgear R7000) silently reclassify packets to
  70  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
  71  * clients would never see some frames (e.g. ARP responses) or would fetch them
  72  * accidentally after a long time.
  73  *
  74  * It makes little sense to enable u-APSD queues by default because it needs
  75  * userspace applications to be aware of it to actually take advantage of the
  76  * possible additional powersavings. Implicitly depending on driver autotrigger
  77  * frame support doesn't make much sense.
  78  */
  79 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
  80
  81 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  82         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  83
  84 #define IEEE80211_DEAUTH_FRAME_LEN      (24 /* hdr */ + 2 /* reason */)
  85
  86 struct ieee80211_fragment_entry {
  87         unsigned long first_frag_time;
  88         unsigned int seq;
  89         unsigned int rx_queue;
  90         unsigned int last_frag;
  91         unsigned int extra_len;
  92         struct sk_buff_head skb_list;
  93         int ccmp; /* Whether fragments were encrypted with CCMP */
  94         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  95 };
  96
  97
  98 struct ieee80211_bss {
  99         u32 device_ts_beacon, device_ts_presp;
 100
 101         bool wmm_used;
 102         bool uapsd_supported;
 103
 104 #define IEEE80211_MAX_SUPP_RATES 32
 105         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 106         size_t supp_rates_len;
 107         struct ieee80211_rate *beacon_rate;
 108
 109         /*
 110          * During association, we save an ERP value from a probe response so
 111          * that we can feed ERP info to the driver when handling the
 112          * association completes. these fields probably won't be up-to-date
 113          * otherwise, you probably don't want to use them.
 114          */
 115         bool has_erp_value;
 116         u8 erp_value;
 117
 118         /* Keep track of the corruption of the last beacon/probe response. */
 119         u8 corrupt_data;
 120
 121         /* Keep track of what bits of information we have valid info for. */
 122         u8 valid_data;
 123 };
 124
 125 /**
 126  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
 127  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
 128  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
 129  *
 130  * These are bss flags that are attached to a bss in the
 131  * @corrupt_data field of &struct ieee80211_bss.
 132  */
 133 enum ieee80211_bss_corrupt_data_flags {
 134         IEEE80211_BSS_CORRUPT_BEACON            = BIT(0),
 135         IEEE80211_BSS_CORRUPT_PROBE_RESP        = BIT(1)
 136 };
 137
 138 /**
 139  * enum ieee80211_valid_data_flags - BSS valid data flags
 140  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
 141  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
 142  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
 143  *
 144  * These are bss flags that are attached to a bss in the
 145  * @valid_data field of &struct ieee80211_bss.  They show which parts
 146  * of the data structure were received as a result of an un-corrupted
 147  * beacon/probe response.
 148  */
 149 enum ieee80211_bss_valid_data_flags {
 150         IEEE80211_BSS_VALID_WMM                 = BIT(1),
 151         IEEE80211_BSS_VALID_RATES               = BIT(2),
 152         IEEE80211_BSS_VALID_ERP                 = BIT(3)
 153 };
 154
 155 typedef unsigned __bitwise__ ieee80211_tx_result;
 156 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 157 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 158 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 159
 160 #define IEEE80211_TX_UNICAST            BIT(1)
 161 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 162
 163 struct ieee80211_tx_data {
 164         struct sk_buff *skb;
 165         struct sk_buff_head skbs;
 166         struct ieee80211_local *local;
 167         struct ieee80211_sub_if_data *sdata;
 168         struct sta_info *sta;
 169         struct ieee80211_key *key;
 170         struct ieee80211_tx_rate rate;
 171
 172         unsigned int flags;
 173 };
 174
 175
 176 typedef unsigned __bitwise__ ieee80211_rx_result;
 177 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 178 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 179 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 180 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 181
 182 /**
 183  * enum ieee80211_packet_rx_flags - packet RX flags
 184  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
 185  *      (incl. multicast frames)
 186  * @IEEE80211_RX_FRAGMENTED: fragmented frame
 187  * @IEEE80211_RX_AMSDU: a-MSDU packet
 188  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 189  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 190  *
 191  * These are per-frame flags that are attached to a frame in the
 192  * @rx_flags field of &struct ieee80211_rx_status.
 193  */
 194 enum ieee80211_packet_rx_flags {
 195         IEEE80211_RX_RA_MATCH                   = BIT(1),
 196         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 197         IEEE80211_RX_AMSDU                      = BIT(3),
 198         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 199         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 200 };
 201
 202 /**
 203  * enum ieee80211_rx_flags - RX data flags
 204  *
 205  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 206  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 207  *      to cfg80211_report_obss_beacon().
 208  * @IEEE80211_RX_REORDER_TIMER: this frame is released by the
 209  *      reorder buffer timeout timer, not the normal RX path
 210  *
 211  * These flags are used across handling multiple interfaces
 212  * for a single frame.
 213  */
 214 enum ieee80211_rx_flags {
 215         IEEE80211_RX_CMNTR              = BIT(0),
 216         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 217         IEEE80211_RX_REORDER_TIMER      = BIT(2),
 218 };
 219
 220 struct ieee80211_rx_data {
 221         struct sk_buff *skb;
 222         struct ieee80211_local *local;
 223         struct ieee80211_sub_if_data *sdata;
 224         struct sta_info *sta;
 225         struct ieee80211_key *key;
 226
 227         unsigned int flags;
 228
 229         /*
 230          * Index into sequence numbers array, 0..16
 231          * since the last (16) is used for non-QoS,
 232          * will be 16 on non-QoS frames.
 233          */
 234         int seqno_idx;
 235
 236         /*
 237          * Index into the security IV/PN arrays, 0..16
 238          * since the last (16) is used for CCMP-encrypted
 239          * management frames, will be set to 16 on mgmt
 240          * frames and 0 on non-QoS frames.
 241          */
 242         int security_idx;
 243
 244         u32 tkip_iv32;
 245         u16 tkip_iv16;
 246 };
 247
 248 struct ieee80211_csa_settings {
 249         const u16 *counter_offsets_beacon;
 250         const u16 *counter_offsets_presp;
 251
 252         int n_counter_offsets_beacon;
 253         int n_counter_offsets_presp;
 254
 255         u8 count;
 256 };
 257
 258 struct beacon_data {
 259         u8 *head, *tail;
 260         int head_len, tail_len;
 261         struct ieee80211_meshconf_ie *meshconf;
 262         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 263         u8 csa_current_counter;
 264         struct rcu_head rcu_head;
 265 };
 266
 267 struct probe_resp {
 268         struct rcu_head rcu_head;
 269         int len;
 270         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 271         u8 data[0];
 272 };
 273
 274 struct ps_data {
 275         /* yes, this looks ugly, but guarantees that we can later use
 276          * bitmap_empty :)
 277          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 278         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
 279                         __aligned(__alignof__(unsigned long));
 280         struct sk_buff_head bc_buf;
 281         atomic_t num_sta_ps; /* number of stations in PS mode */
 282         int dtim_count;
 283         bool dtim_bc_mc;
 284 };
 285
 286 struct ieee80211_if_ap {
 287         struct beacon_data __rcu *beacon;
 288         struct probe_resp __rcu *probe_resp;
 289
 290         /* to be used after channel switch. */
 291         struct cfg80211_beacon_data *next_beacon;
 292         struct list_head vlans; /* write-protected with RTNL and local->mtx */
 293
 294         struct ps_data ps;
 295         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 296         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 297                          driver_smps_mode; /* smps mode request */
 298
 299         struct work_struct request_smps_work;
 300 };
 301
 302 struct ieee80211_if_wds {
 303         struct sta_info *sta;
 304         u8 remote_addr[ETH_ALEN];
 305 };
 306
 307 struct ieee80211_if_vlan {
 308         struct list_head list; /* write-protected with RTNL and local->mtx */
 309
 310         /* used for all tx if the VLAN is configured to 4-addr mode */
 311         struct sta_info __rcu *sta;
 312 };
 313
 314 struct mesh_stats {
 315         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 316         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 317         __u32 fwded_frames;             /* Mesh total forwarded frames */
 318         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 319         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 320         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 321 };
 322
 323 #define PREQ_Q_F_START          0x1
 324 #define PREQ_Q_F_REFRESH        0x2
 325 struct mesh_preq_queue {
 326         struct list_head list;
 327         u8 dst[ETH_ALEN];
 328         u8 flags;
 329 };
 330
 331 struct ieee80211_roc_work {
 332         struct list_head list;
 333         struct list_head dependents;
 334
 335         struct delayed_work work;
 336
 337         struct ieee80211_sub_if_data *sdata;
 338
 339         struct ieee80211_channel *chan;
 340
 341         bool started, abort, hw_begun, notified;
 342         bool to_be_freed;
 343         bool on_channel;
 344
 345         unsigned long hw_start_time;
 346
 347         u32 duration, req_duration;
 348         struct sk_buff *frame;
 349         u64 cookie, mgmt_tx_cookie;
 350         enum ieee80211_roc_type type;
 351 };
 352
 353 /* flags used in struct ieee80211_if_managed.flags */
 354 enum ieee80211_sta_flags {
 355         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 356         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 357         IEEE80211_STA_DISABLE_HT        = BIT(4),
 358         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 359         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 360         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 361         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 362         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 363         IEEE80211_STA_DISABLE_VHT       = BIT(11),
 364         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
 365         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
 366         IEEE80211_STA_DISABLE_WMM       = BIT(14),
 367         IEEE80211_STA_ENABLE_RRM        = BIT(15),
 368 };
 369
 370 struct ieee80211_mgd_auth_data {
 371         struct cfg80211_bss *bss;
 372         unsigned long timeout;
 373         int tries;
 374         u16 algorithm, expected_transaction;
 375
 376         u8 key[WLAN_KEY_LEN_WEP104];
 377         u8 key_len, key_idx;
 378         bool done;
 379         bool timeout_started;
 380
 381         u16 sae_trans, sae_status;
 382         size_t data_len;
 383         u8 data[];
 384 };
 385
 386 struct ieee80211_mgd_assoc_data {
 387         struct cfg80211_bss *bss;
 388         const u8 *supp_rates;
 389
 390         unsigned long timeout;
 391         int tries;
 392
 393         u16 capability;
 394         u8 prev_bssid[ETH_ALEN];
 395         u8 ssid[IEEE80211_MAX_SSID_LEN];
 396         u8 ssid_len;
 397         u8 supp_rates_len;
 398         bool wmm, uapsd;
 399         bool need_beacon;
 400         bool synced;
 401         bool timeout_started;
 402
 403         u8 ap_ht_param;
 404
 405         struct ieee80211_vht_cap ap_vht_cap;
 406
 407         size_t ie_len;
 408         u8 ie[];
 409 };
 410
 411 struct ieee80211_sta_tx_tspec {
 412         /* timestamp of the first packet in the time slice */
 413         unsigned long time_slice_start;
 414
 415         u32 admitted_time; /* in usecs, unlike over the air */
 416         u8 tsid;
 417         s8 up; /* signed to be able to invalidate with -1 during teardown */
 418
 419         /* consumed TX time in microseconds in the time slice */
 420         u32 consumed_tx_time;
 421         enum {
 422                 TX_TSPEC_ACTION_NONE = 0,
 423                 TX_TSPEC_ACTION_DOWNGRADE,
 424                 TX_TSPEC_ACTION_STOP_DOWNGRADE,
 425         } action;
 426         bool downgraded;
 427 };
 428
 429 struct ieee80211_if_managed {
 430         struct timer_list timer;
 431         struct timer_list conn_mon_timer;
 432         struct timer_list bcn_mon_timer;
 433         struct timer_list chswitch_timer;
 434         struct work_struct monitor_work;
 435         struct work_struct chswitch_work;
 436         struct work_struct beacon_connection_loss_work;
 437         struct work_struct csa_connection_drop_work;
 438
 439         unsigned long beacon_timeout;
 440         unsigned long probe_timeout;
 441         int probe_send_count;
 442         bool nullfunc_failed;
 443         bool connection_loss;
 444
 445         struct cfg80211_bss *associated;
 446         struct ieee80211_mgd_auth_data *auth_data;
 447         struct ieee80211_mgd_assoc_data *assoc_data;
 448
 449         u8 bssid[ETH_ALEN];
 450
 451         u16 aid;
 452
 453         bool powersave; /* powersave requested for this iface */
 454         bool broken_ap; /* AP is broken -- turn off powersave */
 455         bool have_beacon;
 456         u8 dtim_period;
 457         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 458                                  driver_smps_mode; /* smps mode request */
 459
 460         struct work_struct request_smps_work;
 461
 462         unsigned int flags;
 463
 464         bool csa_waiting_bcn;
 465         bool csa_ignored_same_chan;
 466
 467         bool beacon_crc_valid;
 468         u32 beacon_crc;
 469
 470         bool status_acked;
 471         bool status_received;
 472         __le16 status_fc;
 473
 474         enum {
 475                 IEEE80211_MFP_DISABLED,
 476                 IEEE80211_MFP_OPTIONAL,
 477                 IEEE80211_MFP_REQUIRED
 478         } mfp; /* management frame protection */
 479
 480         /*
 481          * Bitmask of enabled u-apsd queues,
 482          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 483          * to take effect.
 484          */
 485         unsigned int uapsd_queues;
 486
 487         /*
 488          * Maximum number of buffered frames AP can deliver during a
 489          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 490          * Needs a new association to take effect.
 491          */
 492         unsigned int uapsd_max_sp_len;
 493
 494         int wmm_last_param_set;
 495
 496         u8 use_4addr;
 497
 498         s16 p2p_noa_index;
 499
 500         /* Signal strength from the last Beacon frame in the current BSS. */
 501         int last_beacon_signal;
 502
 503         /*
 504          * Weighted average of the signal strength from Beacon frames in the
 505          * current BSS. This is in units of 1/16 of the signal unit to maintain
 506          * accuracy and to speed up calculations, i.e., the value need to be
 507          * divided by 16 to get the actual value.
 508          */
 509         int ave_beacon_signal;
 510
 511         /*
 512          * Number of Beacon frames used in ave_beacon_signal. This can be used
 513          * to avoid generating less reliable cqm events that would be based
 514          * only on couple of received frames.
 515          */
 516         unsigned int count_beacon_signal;
 517
 518         /*
 519          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 520          * that triggered a cqm event. 0 indicates that no event has been
 521          * generated for the current association.
 522          */
 523         int last_cqm_event_signal;
 524
 525         /*
 526          * State variables for keeping track of RSSI of the AP currently
 527          * connected to and informing driver when RSSI has gone
 528          * below/above a certain threshold.
 529          */
 530         int rssi_min_thold, rssi_max_thold;
 531         int last_ave_beacon_signal;
 532
 533         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 534         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 535         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 536         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
 537
 538         /* TDLS support */
 539         u8 tdls_peer[ETH_ALEN] __aligned(2);
 540         struct delayed_work tdls_peer_del_work;
 541         struct sk_buff *orig_teardown_skb; /* The original teardown skb */
 542         struct sk_buff *teardown_skb; /* A copy to send through the AP */
 543         spinlock_t teardown_lock; /* To lock changing teardown_skb */
 544         bool tdls_chan_switch_prohibited;
 545
 546         /* WMM-AC TSPEC support */
 547         struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
 548         /* Use a separate work struct so that we can do something here
 549          * while the sdata->work is flushing the queues, for example.
 550          * otherwise, in scenarios where we hardly get any traffic out
 551          * on the BE queue, but there's a lot of VO traffic, we might
 552          * get stuck in a downgraded situation and flush takes forever.
 553          */
 554         struct delayed_work tx_tspec_wk;
 555 };
 556
 557 struct ieee80211_if_ibss {
 558         struct timer_list timer;
 559         struct work_struct csa_connection_drop_work;
 560
 561         unsigned long last_scan_completed;
 562
 563         u32 basic_rates;
 564
 565         bool fixed_bssid;
 566         bool fixed_channel;
 567         bool privacy;
 568
 569         bool control_port;
 570         bool userspace_handles_dfs;
 571
 572         u8 bssid[ETH_ALEN] __aligned(2);
 573         u8 ssid[IEEE80211_MAX_SSID_LEN];
 574         u8 ssid_len, ie_len;
 575         u8 *ie;
 576         struct cfg80211_chan_def chandef;
 577
 578         unsigned long ibss_join_req;
 579         /* probe response/beacon for IBSS */
 580         struct beacon_data __rcu *presp;
 581
 582         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 583         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 584
 585         spinlock_t incomplete_lock;
 586         struct list_head incomplete_stations;
 587
 588         enum {
 589                 IEEE80211_IBSS_MLME_SEARCH,
 590                 IEEE80211_IBSS_MLME_JOINED,
 591         } state;
 592 };
 593
 594 /**
 595  * struct ieee80211_if_ocb - OCB mode state
 596  *
 597  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
 598  * @wrkq_flags: OCB deferred task action
 599  * @incomplete_lock: delayed STA insertion lock
 600  * @incomplete_stations: list of STAs waiting for delayed insertion
 601  * @joined: indication if the interface is connected to an OCB network
 602  */
 603 struct ieee80211_if_ocb {
 604         struct timer_list housekeeping_timer;
 605         unsigned long wrkq_flags;
 606
 607         spinlock_t incomplete_lock;
 608         struct list_head incomplete_stations;
 609
 610         bool joined;
 611 };
 612
 613 /**
 614  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 615  *
 616  * these declarations define the interface, which enables
 617  * vendor-specific mesh synchronization
 618  *
 619  */
 620 struct ieee802_11_elems;
 621 struct ieee80211_mesh_sync_ops {
 622         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 623                              u16 stype,
 624                              struct ieee80211_mgmt *mgmt,
 625                              struct ieee802_11_elems *elems,
 626                              struct ieee80211_rx_status *rx_status);
 627
 628         /* should be called with beacon_data under RCU read lock */
 629         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata,
 630                             struct beacon_data *beacon);
 631         /* add other framework functions here */
 632 };
 633
 634 struct mesh_csa_settings {
 635         struct rcu_head rcu_head;
 636         struct cfg80211_csa_settings settings;
 637 };
 638
 639 struct ieee80211_if_mesh {
 640         struct timer_list housekeeping_timer;
 641         struct timer_list mesh_path_timer;
 642         struct timer_list mesh_path_root_timer;
 643
 644         unsigned long wrkq_flags;
 645         unsigned long mbss_changed;
 646
 647         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 648         size_t mesh_id_len;
 649         /* Active Path Selection Protocol Identifier */
 650         u8 mesh_pp_id;
 651         /* Active Path Selection Metric Identifier */
 652         u8 mesh_pm_id;
 653         /* Congestion Control Mode Identifier */
 654         u8 mesh_cc_id;
 655         /* Synchronization Protocol Identifier */
 656         u8 mesh_sp_id;
 657         /* Authentication Protocol Identifier */
 658         u8 mesh_auth_id;
 659         /* Local mesh Sequence Number */
 660         u32 sn;
 661         /* Last used PREQ ID */
 662         u32 preq_id;
 663         atomic_t mpaths;
 664         /* Timestamp of last SN update */
 665         unsigned long last_sn_update;
 666         /* Time when it's ok to send next PERR */
 667         unsigned long next_perr;
 668         /* Timestamp of last PREQ sent */
 669         unsigned long last_preq;
 670         struct mesh_rmc *rmc;
 671         spinlock_t mesh_preq_queue_lock;
 672         struct mesh_preq_queue preq_queue;
 673         int preq_queue_len;
 674         struct mesh_stats mshstats;
 675         struct mesh_config mshcfg;
 676         atomic_t estab_plinks;
 677         u32 mesh_seqnum;
 678         bool accepting_plinks;
 679         int num_gates;
 680         struct beacon_data __rcu *beacon;
 681         const u8 *ie;
 682         u8 ie_len;
 683         enum {
 684                 IEEE80211_MESH_SEC_NONE = 0x0,
 685                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 686                 IEEE80211_MESH_SEC_SECURED = 0x2,
 687         } security;
 688         bool user_mpm;
 689         /* Extensible Synchronization Framework */
 690         const struct ieee80211_mesh_sync_ops *sync_ops;
 691         s64 sync_offset_clockdrift_max;
 692         spinlock_t sync_offset_lock;
 693         bool adjusting_tbtt;
 694         /* mesh power save */
 695         enum nl80211_mesh_power_mode nonpeer_pm;
 696         int ps_peers_light_sleep;
 697         int ps_peers_deep_sleep;
 698         struct ps_data ps;
 699         /* Channel Switching Support */
 700         struct mesh_csa_settings __rcu *csa;
 701         enum {
 702                 IEEE80211_MESH_CSA_ROLE_NONE,
 703                 IEEE80211_MESH_CSA_ROLE_INIT,
 704                 IEEE80211_MESH_CSA_ROLE_REPEATER,
 705         } csa_role;
 706         u8 chsw_ttl;
 707         u16 pre_value;
 708
 709         /* offset from skb->data while building IE */
 710         int meshconf_offset;
 711 };
 712
 713 #ifdef CONFIG_MAC80211_MESH
 714 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 715         do { (msh)->mshstats.name++; } while (0)
 716 #else
 717 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 718         do { } while (0)
 719 #endif
 720
 721 /**
 722  * enum ieee80211_sub_if_data_flags - virtual interface flags
 723  *
 724  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 725  * @IEEE80211_SDATA_PROMISC: interface is promisc
 726  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 727  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 728  *      associated stations and deliver multicast frames both
 729  *      back to wireless media and to the local net stack.
 730  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 731  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 732  */
 733 enum ieee80211_sub_if_data_flags {
 734         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 735         IEEE80211_SDATA_PROMISC                 = BIT(1),
 736         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 737         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 738         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 739         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 740 };
 741
 742 /**
 743  * enum ieee80211_sdata_state_bits - virtual interface state bits
 744  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 745  *      mirrors netif_running() but is separate for interface type
 746  *      change handling while the interface is up
 747  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 748  *      mode, so queues are stopped
 749  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
 750  *      to offchannel, reset when offchannel returns
 751  */
 752 enum ieee80211_sdata_state_bits {
 753         SDATA_STATE_RUNNING,
 754         SDATA_STATE_OFFCHANNEL,
 755         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 756 };
 757
 758 /**
 759  * enum ieee80211_chanctx_mode - channel context configuration mode
 760  *
 761  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
 762  *      multiple interfaces
 763  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
 764  *      only by a single interface. This can be used for example for
 765  *      non-fixed channel IBSS.
 766  */
 767 enum ieee80211_chanctx_mode {
 768         IEEE80211_CHANCTX_SHARED,
 769         IEEE80211_CHANCTX_EXCLUSIVE
 770 };
 771
 772 /**
 773  * enum ieee80211_chanctx_replace_state - channel context replacement state
 774  *
 775  * This is used for channel context in-place reservations that require channel
 776  * context switch/swap.
 777  *
 778  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
 779  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
 780  *      by a (not yet registered) channel context pointed by %replace_ctx.
 781  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
 782  *      replaces an existing channel context pointed to by %replace_ctx.
 783  */
 784 enum ieee80211_chanctx_replace_state {
 785         IEEE80211_CHANCTX_REPLACE_NONE,
 786         IEEE80211_CHANCTX_WILL_BE_REPLACED,
 787         IEEE80211_CHANCTX_REPLACES_OTHER,
 788 };
 789
 790 struct ieee80211_chanctx {
 791         struct list_head list;
 792         struct rcu_head rcu_head;
 793
 794         struct list_head assigned_vifs;
 795         struct list_head reserved_vifs;
 796
 797         enum ieee80211_chanctx_replace_state replace_state;
 798         struct ieee80211_chanctx *replace_ctx;
 799
 800         enum ieee80211_chanctx_mode mode;
 801         bool driver_present;
 802
 803         struct ieee80211_chanctx_conf conf;
 804 };
 805
 806 struct mac80211_qos_map {
 807         struct cfg80211_qos_map qos_map;
 808         struct rcu_head rcu_head;
 809 };
 810
 811 enum txq_info_flags {
 812         IEEE80211_TXQ_STOP,
 813         IEEE80211_TXQ_AMPDU,
 814 };
 815
 816 struct txq_info {
 817         struct sk_buff_head queue;
 818         unsigned long flags;
 819
 820         /* keep last! */
 821         struct ieee80211_txq txq;
 822 };
 823
 824 struct ieee80211_sub_if_data {
 825         struct list_head list;
 826
 827         struct wireless_dev wdev;
 828
 829         /* keys */
 830         struct list_head key_list;
 831
 832         /* count for keys needing tailroom space allocation */
 833         int crypto_tx_tailroom_needed_cnt;
 834         int crypto_tx_tailroom_pending_dec;
 835         struct delayed_work dec_tailroom_needed_wk;
 836
 837         struct net_device *dev;
 838         struct ieee80211_local *local;
 839
 840         unsigned int flags;
 841
 842         unsigned long state;
 843
 844         char name[IFNAMSIZ];
 845
 846         /* Fragment table for host-based reassembly */
 847         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 848         unsigned int fragment_next;
 849
 850         /* TID bitmap for NoAck policy */
 851         u16 noack_map;
 852
 853         /* bit field of ACM bits (BIT(802.1D tag)) */
 854         u8 wmm_acm;
 855
 856         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 857         struct ieee80211_key __rcu *default_unicast_key;
 858         struct ieee80211_key __rcu *default_multicast_key;
 859         struct ieee80211_key __rcu *default_mgmt_key;
 860
 861         u16 sequence_number;
 862         __be16 control_port_protocol;
 863         bool control_port_no_encrypt;
 864         int encrypt_headroom;
 865
 866         atomic_t txqs_len[IEEE80211_NUM_ACS];
 867         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 868         struct mac80211_qos_map __rcu *qos_map;
 869
 870         struct work_struct csa_finalize_work;
 871         bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
 872         struct cfg80211_chan_def csa_chandef;
 873
 874         struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
 875         struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
 876
 877         /* context reservation -- protected with chanctx_mtx */
 878         struct ieee80211_chanctx *reserved_chanctx;
 879         struct cfg80211_chan_def reserved_chandef;
 880         bool reserved_radar_required;
 881         bool reserved_ready;
 882
 883         /* used to reconfigure hardware SM PS */
 884         struct work_struct recalc_smps;
 885
 886         struct work_struct work;
 887         struct sk_buff_head skb_queue;
 888
 889         u8 needed_rx_chains;
 890         enum ieee80211_smps_mode smps_mode;
 891
 892         int user_power_level; /* in dBm */
 893         int ap_power_level; /* in dBm */
 894
 895         bool radar_required;
 896         struct delayed_work dfs_cac_timer_work;
 897
 898         /*
 899          * AP this belongs to: self in AP mode and
 900          * corresponding AP in VLAN mode, NULL for
 901          * all others (might be needed later in IBSS)
 902          */
 903         struct ieee80211_if_ap *bss;
 904
 905         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 906         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 907
 908         bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
 909         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 910
 911         union {
 912                 struct ieee80211_if_ap ap;
 913                 struct ieee80211_if_wds wds;
 914                 struct ieee80211_if_vlan vlan;
 915                 struct ieee80211_if_managed mgd;
 916                 struct ieee80211_if_ibss ibss;
 917                 struct ieee80211_if_mesh mesh;
 918                 struct ieee80211_if_ocb ocb;
 919                 u32 mntr_flags;
 920         } u;
 921
 922 #ifdef CONFIG_MAC80211_DEBUGFS
 923         struct {
 924                 struct dentry *subdir_stations;
 925                 struct dentry *default_unicast_key;
 926                 struct dentry *default_multicast_key;
 927                 struct dentry *default_mgmt_key;
 928         } debugfs;
 929 #endif
 930
 931         /* must be last, dynamically sized area in this! */
 932         struct ieee80211_vif vif;
 933 };
 934
 935 static inline
 936 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 937 {
 938         return container_of(p, struct ieee80211_sub_if_data, vif);
 939 }
 940
 941 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
 942         __acquires(&sdata->wdev.mtx)
 943 {
 944         mutex_lock(&sdata->wdev.mtx);
 945         __acquire(&sdata->wdev.mtx);
 946 }
 947
 948 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
 949         __releases(&sdata->wdev.mtx)
 950 {
 951         mutex_unlock(&sdata->wdev.mtx);
 952         __release(&sdata->wdev.mtx);
 953 }
 954
 955 #define sdata_dereference(p, sdata) \
 956         rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
 957
 958 static inline void
 959 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
 960 {
 961         lockdep_assert_held(&sdata->wdev.mtx);
 962 }
 963
 964 static inline enum ieee80211_band
 965 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
 966 {
 967         enum ieee80211_band band = IEEE80211_BAND_2GHZ;
 968         struct ieee80211_chanctx_conf *chanctx_conf;
 969
 970         rcu_read_lock();
 971         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 972         if (!WARN_ON(!chanctx_conf))
 973                 band = chanctx_conf->def.chan->band;
 974         rcu_read_unlock();
 975
 976         return band;
 977 }
 978
 979 static inline int
 980 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
 981 {
 982         switch (chandef->width) {
 983         case NL80211_CHAN_WIDTH_5:
 984                 return 2;
 985         case NL80211_CHAN_WIDTH_10:
 986                 return 1;
 987         default:
 988                 return 0;
 989         }
 990 }
 991
 992 static inline int
 993 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
 994 {
 995         struct ieee80211_chanctx_conf *chanctx_conf;
 996         int shift = 0;
 997
 998         rcu_read_lock();
 999         chanctx_conf = rcu_dereference(vif->chanctx_conf);
1000         if (chanctx_conf)
1001                 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
1002         rcu_read_unlock();
1003
1004         return shift;
1005 }
1006
1007 struct ieee80211_rx_agg {
1008         u8 addr[ETH_ALEN];
1009         u16 tid;
1010 };
1011
1012 enum sdata_queue_type {
1013         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
1014         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
1015         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
1016         IEEE80211_SDATA_QUEUE_RX_AGG_START      = 3,
1017         IEEE80211_SDATA_QUEUE_RX_AGG_STOP       = 4,
1018         IEEE80211_SDATA_QUEUE_TDLS_CHSW         = 5,
1019 };
1020
1021 enum {
1022         IEEE80211_RX_MSG        = 1,
1023         IEEE80211_TX_STATUS_MSG = 2,
1024 };
1025
1026 enum queue_stop_reason {
1027         IEEE80211_QUEUE_STOP_REASON_DRIVER,
1028         IEEE80211_QUEUE_STOP_REASON_PS,
1029         IEEE80211_QUEUE_STOP_REASON_CSA,
1030         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1031         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1032         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1033         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1034         IEEE80211_QUEUE_STOP_REASON_FLUSH,
1035         IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1036         IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1037
1038         IEEE80211_QUEUE_STOP_REASONS,
1039 };
1040
1041 #ifdef CONFIG_MAC80211_LEDS
1042 struct tpt_led_trigger {
1043         struct led_trigger trig;
1044         char name[32];
1045         const struct ieee80211_tpt_blink *blink_table;
1046         unsigned int blink_table_len;
1047         struct timer_list timer;
1048         unsigned long prev_traffic;
1049         unsigned long tx_bytes, rx_bytes;
1050         unsigned int active, want;
1051         bool running;
1052 };
1053 #endif
1054
1055 /**
1056  * mac80211 scan flags - currently active scan mode
1057  *
1058  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1059  *      well be on the operating channel
1060  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1061  *      determine if we are on the operating channel or not
1062  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1063  *      channel. This should not interrupt normal traffic.
1064  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1065  *      that the scan completed.
1066  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1067  *      a scan complete for an aborted scan.
1068  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1069  *      cancelled.
1070  */
1071 enum {
1072         SCAN_SW_SCANNING,
1073         SCAN_HW_SCANNING,
1074         SCAN_ONCHANNEL_SCANNING,
1075         SCAN_COMPLETED,
1076         SCAN_ABORTED,
1077         SCAN_HW_CANCELLED,
1078 };
1079
1080 /**
1081  * enum mac80211_scan_state - scan state machine states
1082  *
1083  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1084  *      determines if we should keep on scanning or switch back to the
1085  *      operating channel
1086  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1087  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1088  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1089  *      send out data
1090  * @SCAN_RESUME: Resume the scan and scan the next channel
1091  * @SCAN_ABORT: Abort the scan and go back to operating channel
1092  */
1093 enum mac80211_scan_state {
1094         SCAN_DECISION,
1095         SCAN_SET_CHANNEL,
1096         SCAN_SEND_PROBE,
1097         SCAN_SUSPEND,
1098         SCAN_RESUME,
1099         SCAN_ABORT,
1100 };
1101
1102 struct ieee80211_local {
1103         /* embed the driver visible part.
1104          * don't cast (use the static inlines below), but we keep
1105          * it first anyway so they become a no-op */
1106         struct ieee80211_hw hw;
1107
1108         const struct ieee80211_ops *ops;
1109
1110         /*
1111          * private workqueue to mac80211. mac80211 makes this accessible
1112          * via ieee80211_queue_work()
1113          */
1114         struct workqueue_struct *workqueue;
1115
1116         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1117         int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1118         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1119         spinlock_t queue_stop_reason_lock;
1120
1121         int open_count;
1122         int monitors, cooked_mntrs;
1123         /* number of interfaces with corresponding FIF_ flags */
1124         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1125             fif_probe_req;
1126         int probe_req_reg;
1127         unsigned int filter_flags; /* FIF_* */
1128
1129         bool wiphy_ciphers_allocated;
1130
1131         bool use_chanctx;
1132
1133         /* protects the aggregated multicast list and filter calls */
1134         spinlock_t filter_lock;
1135
1136         /* used for uploading changed mc list */
1137         struct work_struct reconfig_filter;
1138
1139         /* aggregated multicast list */
1140         struct netdev_hw_addr_list mc_list;
1141
1142         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1143
1144         /*
1145          * suspended is true if we finished all the suspend _and_ we have
1146          * not yet come up from resume. This is to be used by mac80211
1147          * to ensure driver sanity during suspend and mac80211's own
1148          * sanity. It can eventually be used for WoW as well.
1149          */
1150         bool suspended;
1151
1152         /*
1153          * Resuming is true while suspended, but when we're reprogramming the
1154          * hardware -- at that time it's allowed to use ieee80211_queue_work()
1155          * again even though some other parts of the stack are still suspended
1156          * and we still drop received frames to avoid waking the stack.
1157          */
1158         bool resuming;
1159
1160         /*
1161          * quiescing is true during the suspend process _only_ to
1162          * ease timer cancelling etc.
1163          */
1164         bool quiescing;
1165
1166         /* device is started */
1167         bool started;
1168
1169         /* device is during a HW reconfig */
1170         bool in_reconfig;
1171
1172         /* wowlan is enabled -- don't reconfig on resume */
1173         bool wowlan;
1174
1175         struct work_struct radar_detected_work;
1176
1177         /* number of RX chains the hardware has */
1178         u8 rx_chains;
1179
1180         int tx_headroom; /* required headroom for hardware/radiotap */
1181
1182         /* Tasklet and skb queue to process calls from IRQ mode. All frames
1183          * added to skb_queue will be processed, but frames in
1184          * skb_queue_unreliable may be dropped if the total length of these
1185          * queues increases over the limit. */
1186 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1187         struct tasklet_struct tasklet;
1188         struct sk_buff_head skb_queue;
1189         struct sk_buff_head skb_queue_unreliable;
1190
1191         spinlock_t rx_path_lock;
1192
1193         /* Station data */
1194         /*
1195          * The mutex only protects the list, hash table and
1196          * counter, reads are done with RCU.
1197          */
1198         struct mutex sta_mtx;
1199         spinlock_t tim_lock;
1200         unsigned long num_sta;
1201         struct list_head sta_list;
1202         struct rhashtable sta_hash;
1203         struct timer_list sta_cleanup;
1204         int sta_generation;
1205
1206         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1207         struct tasklet_struct tx_pending_tasklet;
1208
1209         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1210
1211         /* number of interfaces with corresponding IFF_ flags */
1212         atomic_t iff_allmultis, iff_promiscs;
1213
1214         struct rate_control_ref *rate_ctrl;
1215
1216         struct crypto_cipher *wep_tx_tfm;
1217         struct crypto_cipher *wep_rx_tfm;
1218         u32 wep_iv;
1219
1220         /* see iface.c */
1221         struct list_head interfaces;
1222         struct mutex iflist_mtx;
1223
1224         /*
1225          * Key mutex, protects sdata's key_list and sta_info's
1226          * key pointers (write access, they're RCU.)
1227          */
1228         struct mutex key_mtx;
1229
1230         /* mutex for scan and work locking */
1231         struct mutex mtx;
1232
1233         /* Scanning and BSS list */
1234         unsigned long scanning;
1235         struct cfg80211_ssid scan_ssid;
1236         struct cfg80211_scan_request *int_scan_req;
1237         struct cfg80211_scan_request __rcu *scan_req;
1238         struct ieee80211_scan_request *hw_scan_req;
1239         struct cfg80211_chan_def scan_chandef;
1240         enum ieee80211_band hw_scan_band;
1241         int scan_channel_idx;
1242         int scan_ies_len;
1243         int hw_scan_ies_bufsize;
1244
1245         struct work_struct sched_scan_stopped_work;
1246         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1247         struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1248         u8 scan_addr[ETH_ALEN];
1249
1250         unsigned long leave_oper_channel_time;
1251         enum mac80211_scan_state next_scan_state;
1252         struct delayed_work scan_work;
1253         struct ieee80211_sub_if_data __rcu *scan_sdata;
1254         /* For backward compatibility only -- do not use */
1255         struct cfg80211_chan_def _oper_chandef;
1256
1257         /* Temporary remain-on-channel for off-channel operations */
1258         struct ieee80211_channel *tmp_channel;
1259
1260         /* channel contexts */
1261         struct list_head chanctx_list;
1262         struct mutex chanctx_mtx;
1263
1264         /* SNMP counters */
1265         /* dot11CountersTable */
1266         u32 dot11TransmittedFragmentCount;
1267         u32 dot11MulticastTransmittedFrameCount;
1268         u32 dot11FailedCount;
1269         u32 dot11RetryCount;
1270         u32 dot11MultipleRetryCount;
1271         u32 dot11FrameDuplicateCount;
1272         u32 dot11ReceivedFragmentCount;
1273         u32 dot11MulticastReceivedFrameCount;
1274         u32 dot11TransmittedFrameCount;
1275
1276 #ifdef CONFIG_MAC80211_LEDS
1277         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
1278         struct tpt_led_trigger *tpt_led_trigger;
1279         char tx_led_name[32], rx_led_name[32],
1280              assoc_led_name[32], radio_led_name[32];
1281 #endif
1282
1283 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1284         /* TX/RX handler statistics */
1285         unsigned int tx_handlers_drop;
1286         unsigned int tx_handlers_queued;
1287         unsigned int tx_handlers_drop_fragment;
1288         unsigned int tx_handlers_drop_wep;
1289         unsigned int tx_handlers_drop_not_assoc;
1290         unsigned int tx_handlers_drop_unauth_port;
1291         unsigned int rx_handlers_drop;
1292         unsigned int rx_handlers_queued;
1293         unsigned int rx_handlers_drop_nullfunc;
1294         unsigned int rx_handlers_drop_defrag;
1295         unsigned int rx_handlers_drop_short;
1296         unsigned int tx_expand_skb_head;
1297         unsigned int tx_expand_skb_head_cloned;
1298         unsigned int rx_expand_skb_head;
1299         unsigned int rx_expand_skb_head2;
1300         unsigned int rx_handlers_fragments;
1301         unsigned int tx_status_drop;
1302 #define I802_DEBUG_INC(c) (c)++
1303 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1304 #define I802_DEBUG_INC(c) do { } while (0)
1305 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1306
1307
1308         int total_ps_buffered; /* total number of all buffered unicast and
1309                                 * multicast packets for power saving stations
1310                                 */
1311
1312         bool pspolling;
1313         bool offchannel_ps_enabled;
1314         /*
1315          * PS can only be enabled when we have exactly one managed
1316          * interface (and monitors) in PS, this then points there.
1317          */
1318         struct ieee80211_sub_if_data *ps_sdata;
1319         struct work_struct dynamic_ps_enable_work;
1320         struct work_struct dynamic_ps_disable_work;
1321         struct timer_list dynamic_ps_timer;
1322         struct notifier_block network_latency_notifier;
1323         struct notifier_block ifa_notifier;
1324         struct notifier_block ifa6_notifier;
1325
1326         /*
1327          * The dynamic ps timeout configured from user space via WEXT -
1328          * this will override whatever chosen by mac80211 internally.
1329          */
1330         int dynamic_ps_forced_timeout;
1331
1332         int user_power_level; /* in dBm, for all interfaces */
1333
1334         enum ieee80211_smps_mode smps_mode;
1335
1336         struct work_struct restart_work;
1337
1338 #ifdef CONFIG_MAC80211_DEBUGFS
1339         struct local_debugfsdentries {
1340                 struct dentry *rcdir;
1341                 struct dentry *keys;
1342         } debugfs;
1343 #endif
1344
1345         /*
1346          * Remain-on-channel support
1347          */
1348         struct list_head roc_list;
1349         struct work_struct hw_roc_start, hw_roc_done;
1350         unsigned long hw_roc_start_time;
1351         u64 roc_cookie_counter;
1352
1353         struct idr ack_status_frames;
1354         spinlock_t ack_status_lock;
1355
1356         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1357
1358         struct napi_struct *napi;
1359
1360         /* virtual monitor interface */
1361         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1362         struct cfg80211_chan_def monitor_chandef;
1363
1364         /* extended capabilities provided by mac80211 */
1365         u8 ext_capa[8];
1366 };
1367
1368 static inline struct ieee80211_sub_if_data *
1369 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1370 {
1371         return netdev_priv(dev);
1372 }
1373
1374 static inline struct ieee80211_sub_if_data *
1375 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1376 {
1377         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1378 }
1379
1380 /* this struct represents 802.11n's RA/TID combination */
1381 struct ieee80211_ra_tid {
1382         u8 ra[ETH_ALEN];
1383         u16 tid;
1384 };
1385
1386 /* this struct holds the value parsing from channel switch IE  */
1387 struct ieee80211_csa_ie {
1388         struct cfg80211_chan_def chandef;
1389         u8 mode;
1390         u8 count;
1391         u8 ttl;
1392         u16 pre_value;
1393 };
1394
1395 /* Parsed Information Elements */
1396 struct ieee802_11_elems {
1397         const u8 *ie_start;
1398         size_t total_len;
1399
1400         /* pointers to IEs */
1401         const struct ieee80211_tdls_lnkie *lnk_id;
1402         const struct ieee80211_ch_switch_timing *ch_sw_timing;
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 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1465 {
1466         return container_of(txq, struct txq_info, txq);
1467 }
1468
1469 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1470 {
1471         return ether_addr_equal(raddr, addr) ||
1472                is_broadcast_ether_addr(raddr);
1473 }
1474
1475 static inline bool
1476 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1477 {
1478         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1479                      status->flag & RX_FLAG_MACTIME_END);
1480         return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1481 }
1482
1483 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1484                                      struct ieee80211_rx_status *status,
1485                                      unsigned int mpdu_len,
1486                                      unsigned int mpdu_offset);
1487 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1488 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1489 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1490                                       u32 changed);
1491 void ieee80211_configure_filter(struct ieee80211_local *local);
1492 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1493
1494 /* STA code */
1495 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1496 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1497                        struct cfg80211_auth_request *req);
1498 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1499                         struct cfg80211_assoc_request *req);
1500 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1501                          struct cfg80211_deauth_request *req);
1502 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1503                            struct cfg80211_disassoc_request *req);
1504 void ieee80211_send_pspoll(struct ieee80211_local *local,
1505                            struct ieee80211_sub_if_data *sdata);
1506 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1507 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1508 int ieee80211_max_network_latency(struct notifier_block *nb,
1509                                   unsigned long data, void *dummy);
1510 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1511 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1512 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1513                                   struct sk_buff *skb);
1514 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1515 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1516 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1517 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1518                                   __le16 fc, bool acked);
1519 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1520 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1521 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1522
1523 /* IBSS code */
1524 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1525 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1526 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1527                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1528 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1529                         struct cfg80211_ibss_params *params);
1530 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1531 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1532 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1533                                    struct sk_buff *skb);
1534 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1535                               struct cfg80211_csa_settings *csa_settings);
1536 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1537 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1538
1539 /* OCB code */
1540 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1541 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1542                              const u8 *bssid, const u8 *addr, u32 supp_rates);
1543 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1544 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1545                        struct ocb_setup *setup);
1546 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1547
1548 /* mesh code */
1549 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1550 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1551                                    struct sk_buff *skb);
1552 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1553                               struct cfg80211_csa_settings *csa_settings);
1554 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1555
1556 /* scan/BSS handling */
1557 void ieee80211_scan_work(struct work_struct *work);
1558 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1559                                 const u8 *ssid, u8 ssid_len,
1560                                 struct ieee80211_channel **channels,
1561                                 unsigned int n_channels,
1562                                 enum nl80211_bss_scan_width scan_width);
1563 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1564                            struct cfg80211_scan_request *req);
1565 void ieee80211_scan_cancel(struct ieee80211_local *local);
1566 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1567 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1568
1569 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1570 struct ieee80211_bss *
1571 ieee80211_bss_info_update(struct ieee80211_local *local,
1572                           struct ieee80211_rx_status *rx_status,
1573                           struct ieee80211_mgmt *mgmt,
1574                           size_t len,
1575                           struct ieee802_11_elems *elems,
1576                           struct ieee80211_channel *channel);
1577 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1578                           struct ieee80211_bss *bss);
1579
1580 /* scheduled scan handling */
1581 int
1582 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1583                                      struct cfg80211_sched_scan_request *req);
1584 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1585                                        struct cfg80211_sched_scan_request *req);
1586 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1587 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1588 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1589
1590 /* off-channel helpers */
1591 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1592 void ieee80211_offchannel_return(struct ieee80211_local *local);
1593 void ieee80211_roc_setup(struct ieee80211_local *local);
1594 void ieee80211_start_next_roc(struct ieee80211_local *local);
1595 void ieee80211_roc_purge(struct ieee80211_local *local,
1596                          struct ieee80211_sub_if_data *sdata);
1597 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
1598 void ieee80211_sw_roc_work(struct work_struct *work);
1599 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1600
1601 /* channel switch handling */
1602 void ieee80211_csa_finalize_work(struct work_struct *work);
1603 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1604                              struct cfg80211_csa_settings *params);
1605
1606 /* interface handling */
1607 int ieee80211_iface_init(void);
1608 void ieee80211_iface_exit(void);
1609 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1610                      unsigned char name_assign_type,
1611                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1612                      struct vif_params *params);
1613 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1614                              enum nl80211_iftype type);
1615 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1616 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1617 u32 ieee80211_idle_off(struct ieee80211_local *local);
1618 void ieee80211_recalc_idle(struct ieee80211_local *local);
1619 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1620                                     const int offset);
1621 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1622 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1623 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1624 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1625
1626 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1627 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1628                               bool update_bss);
1629
1630 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1631 {
1632         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1633 }
1634
1635 /* tx handling */
1636 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1637 void ieee80211_tx_pending(unsigned long data);
1638 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1639                                          struct net_device *dev);
1640 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1641                                        struct net_device *dev);
1642 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
1643                                   struct net_device *dev,
1644                                   u32 info_flags);
1645 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1646                               struct sk_buff_head *skbs);
1647 struct sk_buff *
1648 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
1649                               struct sk_buff *skb, u32 info_flags);
1650
1651 /* HT */
1652 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1653                                      struct ieee80211_sta_ht_cap *ht_cap);
1654 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1655                                        struct ieee80211_supported_band *sband,
1656                                        const struct ieee80211_ht_cap *ht_cap_ie,
1657                                        struct sta_info *sta);
1658 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1659                           const u8 *da, u16 tid,
1660                           u16 initiator, u16 reason_code);
1661 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1662                                enum ieee80211_smps_mode smps, const u8 *da,
1663                                const u8 *bssid);
1664 void ieee80211_request_smps_ap_work(struct work_struct *work);
1665 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1666 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1667                                    enum ieee80211_smps_mode smps_mode_new);
1668
1669 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1670                                      u16 initiator, u16 reason, bool stop);
1671 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1672                                     u16 initiator, u16 reason, bool stop);
1673 void __ieee80211_start_rx_ba_session(struct sta_info *sta,
1674                                      u8 dialog_token, u16 timeout,
1675                                      u16 start_seq_num, u16 ba_policy, u16 tid,
1676                                      u16 buf_size, bool tx, bool auto_seq);
1677 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1678                                          enum ieee80211_agg_stop_reason reason);
1679 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1680                              struct sta_info *sta,
1681                              struct ieee80211_mgmt *mgmt, size_t len);
1682 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1683                                   struct sta_info *sta,
1684                                   struct ieee80211_mgmt *mgmt,
1685                                   size_t len);
1686 void ieee80211_process_addba_request(struct ieee80211_local *local,
1687                                      struct sta_info *sta,
1688                                      struct ieee80211_mgmt *mgmt,
1689                                      size_t len);
1690
1691 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1692                                    enum ieee80211_agg_stop_reason reason);
1693 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1694                                     enum ieee80211_agg_stop_reason reason);
1695 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1696 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1697 void ieee80211_ba_session_work(struct work_struct *work);
1698 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1699 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1700
1701 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1702
1703 /* VHT */
1704 void
1705 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1706                                     struct ieee80211_supported_band *sband,
1707                                     const struct ieee80211_vht_cap *vht_cap_ie,
1708                                     struct sta_info *sta);
1709 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
1710 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1711 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1712 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1713                                   struct sta_info *sta, u8 opmode,
1714                                   enum ieee80211_band band, bool nss_only);
1715 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1716                                  struct sta_info *sta, u8 opmode,
1717                                  enum ieee80211_band band, bool nss_only);
1718 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1719                                       struct ieee80211_sta_vht_cap *vht_cap);
1720
1721 /* Spectrum management */
1722 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1723                                        struct ieee80211_mgmt *mgmt,
1724                                        size_t len);
1725 /**
1726  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1727  * @sdata: the sdata of the interface which has received the frame
1728  * @elems: parsed 802.11 elements received with the frame
1729  * @current_band: indicates the current band
1730  * @sta_flags: contains information about own capabilities and restrictions
1731  *      to decide which channel switch announcements can be accepted. Only the
1732  *      following subset of &enum ieee80211_sta_flags are evaluated:
1733  *      %IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1734  *      %IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1735  *      %IEEE80211_STA_DISABLE_160MHZ.
1736  * @bssid: the currently connected bssid (for reporting)
1737  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1738         All of them will be filled with if success only.
1739  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1740  */
1741 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1742                                  struct ieee802_11_elems *elems,
1743                                  enum ieee80211_band current_band,
1744                                  u32 sta_flags, u8 *bssid,
1745                                  struct ieee80211_csa_ie *csa_ie);
1746
1747 /* Suspend/resume and hw reconfiguration */
1748 int ieee80211_reconfig(struct ieee80211_local *local);
1749 void ieee80211_stop_device(struct ieee80211_local *local);
1750
1751 int __ieee80211_suspend(struct ieee80211_hw *hw,
1752                         struct cfg80211_wowlan *wowlan);
1753
1754 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1755 {
1756         struct ieee80211_local *local = hw_to_local(hw);
1757
1758         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
1759              !test_bit(SCAN_COMPLETED, &local->scanning),
1760                 "%s: resume with hardware scan still in progress\n",
1761                 wiphy_name(hw->wiphy));
1762
1763         return ieee80211_reconfig(hw_to_local(hw));
1764 }
1765
1766 /* utility functions/constants */
1767 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1768 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1769                         enum nl80211_iftype type);
1770 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1771                              int rate, int erp, int short_preamble,
1772                              int shift);
1773 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1774                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1775                                      gfp_t gfp);
1776 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1777                                bool bss_notify);
1778 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1779                     struct sta_info *sta, struct sk_buff *skb);
1780
1781 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1782                                  struct sk_buff *skb, int tid,
1783                                  enum ieee80211_band band);
1784
1785 static inline void
1786 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1787                           struct sk_buff *skb, int tid,
1788                           enum ieee80211_band band)
1789 {
1790         rcu_read_lock();
1791         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1792         rcu_read_unlock();
1793 }
1794
1795 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1796                                         struct sk_buff *skb, int tid)
1797 {
1798         struct ieee80211_chanctx_conf *chanctx_conf;
1799
1800         rcu_read_lock();
1801         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1802         if (WARN_ON(!chanctx_conf)) {
1803                 rcu_read_unlock();
1804                 kfree_skb(skb);
1805                 return;
1806         }
1807
1808         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1809                                     chanctx_conf->def.chan->band);
1810         rcu_read_unlock();
1811 }
1812
1813 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1814                                     struct sk_buff *skb)
1815 {
1816         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1817         ieee80211_tx_skb_tid(sdata, skb, 7);
1818 }
1819
1820 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1821                                struct ieee802_11_elems *elems,
1822                                u64 filter, u32 crc);
1823 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1824                                           bool action,
1825                                           struct ieee802_11_elems *elems)
1826 {
1827         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1828 }
1829
1830 static inline bool ieee80211_rx_reorder_ready(struct sk_buff_head *frames)
1831 {
1832         struct sk_buff *tail = skb_peek_tail(frames);
1833         struct ieee80211_rx_status *status;
1834
1835         if (!tail)
1836                 return false;
1837
1838         status = IEEE80211_SKB_RXCB(tail);
1839         if (status->flag & RX_FLAG_AMSDU_MORE)
1840                 return false;
1841
1842         return true;
1843 }
1844
1845 extern const int ieee802_1d_to_ac[8];
1846
1847 static inline int ieee80211_ac_from_tid(int tid)
1848 {
1849         return ieee802_1d_to_ac[tid & 7];
1850 }
1851
1852 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1853 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1854 void ieee80211_dynamic_ps_timer(unsigned long data);
1855 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1856                              struct ieee80211_sub_if_data *sdata,
1857                              int powersave);
1858 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1859                              struct ieee80211_hdr *hdr);
1860 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1861                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
1862
1863 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1864                                      unsigned long queues,
1865                                      enum queue_stop_reason reason,
1866                                      bool refcounted);
1867 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
1868                                struct ieee80211_sub_if_data *sdata,
1869                                enum queue_stop_reason reason);
1870 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
1871                                struct ieee80211_sub_if_data *sdata,
1872                                enum queue_stop_reason reason);
1873 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1874                                      unsigned long queues,
1875                                      enum queue_stop_reason reason,
1876                                      bool refcounted);
1877 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1878                                     enum queue_stop_reason reason,
1879                                     bool refcounted);
1880 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1881                                     enum queue_stop_reason reason,
1882                                     bool refcounted);
1883 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1884 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1885                                struct sk_buff *skb);
1886 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1887                                 struct sk_buff_head *skbs);
1888 void ieee80211_flush_queues(struct ieee80211_local *local,
1889                             struct ieee80211_sub_if_data *sdata, bool drop);
1890 void __ieee80211_flush_queues(struct ieee80211_local *local,
1891                               struct ieee80211_sub_if_data *sdata,
1892                               unsigned int queues, bool drop);
1893
1894 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
1895 {
1896         /*
1897          * If quiescing is set, we are racing with __ieee80211_suspend.
1898          * __ieee80211_suspend flushes the workers after setting quiescing,
1899          * and we check quiescing / suspended before enqueing new workers.
1900          * We should abort the worker to avoid the races below.
1901          */
1902         if (local->quiescing)
1903                 return false;
1904
1905         /*
1906          * We might already be suspended if the following scenario occurs:
1907          * __ieee80211_suspend          Control path
1908          *
1909          *                              if (local->quiescing)
1910          *                                      return;
1911          * local->quiescing = true;
1912          * flush_workqueue();
1913          *                              queue_work(...);
1914          * local->suspended = true;
1915          * local->quiescing = false;
1916          *                              worker starts running...
1917          */
1918         if (local->suspended)
1919                 return false;
1920
1921         return true;
1922 }
1923
1924 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
1925                              struct sta_info *sta,
1926                              struct txq_info *txq, int tid);
1927 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1928                          u16 transaction, u16 auth_alg, u16 status,
1929                          const u8 *extra, size_t extra_len, const u8 *bssid,
1930                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1931                          u32 tx_flags);
1932 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1933                                     const u8 *bssid, u16 stype, u16 reason,
1934                                     bool send_frame, u8 *frame_buf);
1935 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1936                              size_t buffer_len,
1937                              struct ieee80211_scan_ies *ie_desc,
1938                              const u8 *ie, size_t ie_len,
1939                              u8 bands_used, u32 *rate_masks,
1940                              struct cfg80211_chan_def *chandef);
1941 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1942                                           const u8 *src, const u8 *dst,
1943                                           u32 ratemask,
1944                                           struct ieee80211_channel *chan,
1945                                           const u8 *ssid, size_t ssid_len,
1946                                           const u8 *ie, size_t ie_len,
1947                                           bool directed);
1948 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1949                               const u8 *src, const u8 *dst,
1950                               const u8 *ssid, size_t ssid_len,
1951                               const u8 *ie, size_t ie_len,
1952                               u32 ratemask, bool directed, u32 tx_flags,
1953                               struct ieee80211_channel *channel, bool scan);
1954
1955 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1956                             struct ieee802_11_elems *elems,
1957                             enum ieee80211_band band, u32 *basic_rates);
1958 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
1959                                  enum ieee80211_smps_mode smps_mode);
1960 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
1961                                 enum ieee80211_smps_mode smps_mode);
1962 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1963 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
1964
1965 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1966 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1967                               u16 cap);
1968 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1969                                const struct cfg80211_chan_def *chandef,
1970                                u16 prot_mode);
1971 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1972                                u32 cap);
1973 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1974                                 const struct cfg80211_chan_def *chandef);
1975 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
1976                              const struct ieee80211_supported_band *sband,
1977                              const u8 *srates, int srates_len, u32 *rates);
1978 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1979                             struct sk_buff *skb, bool need_basic,
1980                             enum ieee80211_band band);
1981 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1982                                 struct sk_buff *skb, bool need_basic,
1983                                 enum ieee80211_band band);
1984 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
1985
1986 /* channel management */
1987 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1988                                   const struct ieee80211_ht_operation *ht_oper,
1989                                   struct cfg80211_chan_def *chandef);
1990 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
1991                                    const struct ieee80211_vht_operation *oper,
1992                                    struct cfg80211_chan_def *chandef);
1993 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
1994
1995 int __must_check
1996 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1997                           const struct cfg80211_chan_def *chandef,
1998                           enum ieee80211_chanctx_mode mode);
1999 int __must_check
2000 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
2001                               const struct cfg80211_chan_def *chandef,
2002                               enum ieee80211_chanctx_mode mode,
2003                               bool radar_required);
2004 int __must_check
2005 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
2006 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
2007
2008 int __must_check
2009 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
2010                                const struct cfg80211_chan_def *chandef,
2011                                u32 *changed);
2012 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
2013 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2014 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2015                                          bool clear);
2016 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2017                                struct ieee80211_chanctx *ctx);
2018
2019 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2020                                    struct ieee80211_chanctx *chanctx);
2021 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2022                                       struct ieee80211_chanctx *ctx);
2023 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2024
2025 void ieee80211_dfs_cac_timer(unsigned long data);
2026 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2027 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2028 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2029 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2030                               struct cfg80211_csa_settings *csa_settings);
2031
2032 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2033 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2034 const struct ieee80211_cipher_scheme *
2035 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2036                  enum nl80211_iftype iftype);
2037 int ieee80211_cs_headroom(struct ieee80211_local *local,
2038                           struct cfg80211_crypto_settings *crypto,
2039                           enum nl80211_iftype iftype);
2040 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2041                            struct ieee80211_sub_if_data *sdata);
2042 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2043                                  const struct cfg80211_chan_def *chandef,
2044                                  enum ieee80211_chanctx_mode chanmode,
2045                                  u8 radar_detect);
2046 int ieee80211_max_num_channels(struct ieee80211_local *local);
2047
2048 /* TDLS */
2049 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2050                         const u8 *peer, u8 action_code, u8 dialog_token,
2051                         u16 status_code, u32 peer_capability,
2052                         bool initiator, const u8 *extra_ies,
2053                         size_t extra_ies_len);
2054 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2055                         const u8 *peer, enum nl80211_tdls_operation oper);
2056 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2057 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2058                                   const u8 *addr, u8 oper_class,
2059                                   struct cfg80211_chan_def *chandef);
2060 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2061                                           struct net_device *dev,
2062                                           const u8 *addr);
2063 void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2064                                            struct sk_buff *skb);
2065
2066 extern const struct ethtool_ops ieee80211_ethtool_ops;
2067
2068 #ifdef CONFIG_MAC80211_NOINLINE
2069 #define debug_noinline noinline
2070 #else
2071 #define debug_noinline
2072 #endif
2073
2074 #endif /* IEEE80211_I_H */