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_FRAGMENTED: fragmented frame
 185  * @IEEE80211_RX_AMSDU: a-MSDU packet
 186  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 187  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 188  *
 189  * These are per-frame flags that are attached to a frame in the
 190  * @rx_flags field of &struct ieee80211_rx_status.
 191  */
 192 enum ieee80211_packet_rx_flags {
 193         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 194         IEEE80211_RX_AMSDU                      = BIT(3),
 195         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 196         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 197 };
 198
 199 /**
 200  * enum ieee80211_rx_flags - RX data flags
 201  *
 202  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 203  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 204  *      to cfg80211_report_obss_beacon().
 205  * @IEEE80211_RX_REORDER_TIMER: this frame is released by the
 206  *      reorder buffer timeout timer, not the normal RX path
 207  *
 208  * These flags are used across handling multiple interfaces
 209  * for a single frame.
 210  */
 211 enum ieee80211_rx_flags {
 212         IEEE80211_RX_CMNTR              = BIT(0),
 213         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 214         IEEE80211_RX_REORDER_TIMER      = BIT(2),
 215 };
 216
 217 struct ieee80211_rx_data {
 218         struct sk_buff *skb;
 219         struct ieee80211_local *local;
 220         struct ieee80211_sub_if_data *sdata;
 221         struct sta_info *sta;
 222         struct ieee80211_key *key;
 223
 224         unsigned int flags;
 225
 226         /*
 227          * Index into sequence numbers array, 0..16
 228          * since the last (16) is used for non-QoS,
 229          * will be 16 on non-QoS frames.
 230          */
 231         int seqno_idx;
 232
 233         /*
 234          * Index into the security IV/PN arrays, 0..16
 235          * since the last (16) is used for CCMP-encrypted
 236          * management frames, will be set to 16 on mgmt
 237          * frames and 0 on non-QoS frames.
 238          */
 239         int security_idx;
 240
 241         u32 tkip_iv32;
 242         u16 tkip_iv16;
 243 };
 244
 245 struct ieee80211_csa_settings {
 246         const u16 *counter_offsets_beacon;
 247         const u16 *counter_offsets_presp;
 248
 249         int n_counter_offsets_beacon;
 250         int n_counter_offsets_presp;
 251
 252         u8 count;
 253 };
 254
 255 struct beacon_data {
 256         u8 *head, *tail;
 257         int head_len, tail_len;
 258         struct ieee80211_meshconf_ie *meshconf;
 259         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 260         u8 csa_current_counter;
 261         struct rcu_head rcu_head;
 262 };
 263
 264 struct probe_resp {
 265         struct rcu_head rcu_head;
 266         int len;
 267         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 268         u8 data[0];
 269 };
 270
 271 struct ps_data {
 272         /* yes, this looks ugly, but guarantees that we can later use
 273          * bitmap_empty :)
 274          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 275         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
 276                         __aligned(__alignof__(unsigned long));
 277         struct sk_buff_head bc_buf;
 278         atomic_t num_sta_ps; /* number of stations in PS mode */
 279         int dtim_count;
 280         bool dtim_bc_mc;
 281 };
 282
 283 struct ieee80211_if_ap {
 284         struct beacon_data __rcu *beacon;
 285         struct probe_resp __rcu *probe_resp;
 286
 287         /* to be used after channel switch. */
 288         struct cfg80211_beacon_data *next_beacon;
 289         struct list_head vlans; /* write-protected with RTNL and local->mtx */
 290
 291         struct ps_data ps;
 292         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 293         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 294                          driver_smps_mode; /* smps mode request */
 295
 296         struct work_struct request_smps_work;
 297 };
 298
 299 struct ieee80211_if_wds {
 300         struct sta_info *sta;
 301         u8 remote_addr[ETH_ALEN];
 302 };
 303
 304 struct ieee80211_if_vlan {
 305         struct list_head list; /* write-protected with RTNL and local->mtx */
 306
 307         /* used for all tx if the VLAN is configured to 4-addr mode */
 308         struct sta_info __rcu *sta;
 309 };
 310
 311 struct mesh_stats {
 312         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 313         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 314         __u32 fwded_frames;             /* Mesh total forwarded frames */
 315         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 316         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 317         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 318 };
 319
 320 #define PREQ_Q_F_START          0x1
 321 #define PREQ_Q_F_REFRESH        0x2
 322 struct mesh_preq_queue {
 323         struct list_head list;
 324         u8 dst[ETH_ALEN];
 325         u8 flags;
 326 };
 327
 328 struct ieee80211_roc_work {
 329         struct list_head list;
 330         struct list_head dependents;
 331
 332         struct delayed_work work;
 333
 334         struct ieee80211_sub_if_data *sdata;
 335
 336         struct ieee80211_channel *chan;
 337
 338         bool started, abort, hw_begun, notified;
 339         bool to_be_freed;
 340         bool on_channel;
 341
 342         unsigned long hw_start_time;
 343
 344         u32 duration, req_duration;
 345         struct sk_buff *frame;
 346         u64 cookie, mgmt_tx_cookie;
 347         enum ieee80211_roc_type type;
 348 };
 349
 350 /* flags used in struct ieee80211_if_managed.flags */
 351 enum ieee80211_sta_flags {
 352         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 353         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 354         IEEE80211_STA_DISABLE_HT        = BIT(4),
 355         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 356         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 357         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 358         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 359         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 360         IEEE80211_STA_DISABLE_VHT       = BIT(11),
 361         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
 362         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
 363         IEEE80211_STA_DISABLE_WMM       = BIT(14),
 364         IEEE80211_STA_ENABLE_RRM        = BIT(15),
 365 };
 366
 367 struct ieee80211_mgd_auth_data {
 368         struct cfg80211_bss *bss;
 369         unsigned long timeout;
 370         int tries;
 371         u16 algorithm, expected_transaction;
 372
 373         u8 key[WLAN_KEY_LEN_WEP104];
 374         u8 key_len, key_idx;
 375         bool done;
 376         bool timeout_started;
 377
 378         u16 sae_trans, sae_status;
 379         size_t data_len;
 380         u8 data[];
 381 };
 382
 383 struct ieee80211_mgd_assoc_data {
 384         struct cfg80211_bss *bss;
 385         const u8 *supp_rates;
 386
 387         unsigned long timeout;
 388         int tries;
 389
 390         u16 capability;
 391         u8 prev_bssid[ETH_ALEN];
 392         u8 ssid[IEEE80211_MAX_SSID_LEN];
 393         u8 ssid_len;
 394         u8 supp_rates_len;
 395         bool wmm, uapsd;
 396         bool need_beacon;
 397         bool synced;
 398         bool timeout_started;
 399
 400         u8 ap_ht_param;
 401
 402         struct ieee80211_vht_cap ap_vht_cap;
 403
 404         size_t ie_len;
 405         u8 ie[];
 406 };
 407
 408 struct ieee80211_sta_tx_tspec {
 409         /* timestamp of the first packet in the time slice */
 410         unsigned long time_slice_start;
 411
 412         u32 admitted_time; /* in usecs, unlike over the air */
 413         u8 tsid;
 414         s8 up; /* signed to be able to invalidate with -1 during teardown */
 415
 416         /* consumed TX time in microseconds in the time slice */
 417         u32 consumed_tx_time;
 418         enum {
 419                 TX_TSPEC_ACTION_NONE = 0,
 420                 TX_TSPEC_ACTION_DOWNGRADE,
 421                 TX_TSPEC_ACTION_STOP_DOWNGRADE,
 422         } action;
 423         bool downgraded;
 424 };
 425
 426 struct ieee80211_if_managed {
 427         struct timer_list timer;
 428         struct timer_list conn_mon_timer;
 429         struct timer_list bcn_mon_timer;
 430         struct timer_list chswitch_timer;
 431         struct work_struct monitor_work;
 432         struct work_struct chswitch_work;
 433         struct work_struct beacon_connection_loss_work;
 434         struct work_struct csa_connection_drop_work;
 435
 436         unsigned long beacon_timeout;
 437         unsigned long probe_timeout;
 438         int probe_send_count;
 439         bool nullfunc_failed;
 440         bool connection_loss;
 441
 442         struct cfg80211_bss *associated;
 443         struct ieee80211_mgd_auth_data *auth_data;
 444         struct ieee80211_mgd_assoc_data *assoc_data;
 445
 446         u8 bssid[ETH_ALEN];
 447
 448         u16 aid;
 449
 450         bool powersave; /* powersave requested for this iface */
 451         bool broken_ap; /* AP is broken -- turn off powersave */
 452         bool have_beacon;
 453         u8 dtim_period;
 454         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 455                                  driver_smps_mode; /* smps mode request */
 456
 457         struct work_struct request_smps_work;
 458
 459         unsigned int flags;
 460
 461         bool csa_waiting_bcn;
 462         bool csa_ignored_same_chan;
 463
 464         bool beacon_crc_valid;
 465         u32 beacon_crc;
 466
 467         bool status_acked;
 468         bool status_received;
 469         __le16 status_fc;
 470
 471         enum {
 472                 IEEE80211_MFP_DISABLED,
 473                 IEEE80211_MFP_OPTIONAL,
 474                 IEEE80211_MFP_REQUIRED
 475         } mfp; /* management frame protection */
 476
 477         /*
 478          * Bitmask of enabled u-apsd queues,
 479          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 480          * to take effect.
 481          */
 482         unsigned int uapsd_queues;
 483
 484         /*
 485          * Maximum number of buffered frames AP can deliver during a
 486          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 487          * Needs a new association to take effect.
 488          */
 489         unsigned int uapsd_max_sp_len;
 490
 491         int wmm_last_param_set;
 492
 493         u8 use_4addr;
 494
 495         s16 p2p_noa_index;
 496
 497         /* Signal strength from the last Beacon frame in the current BSS. */
 498         int last_beacon_signal;
 499
 500         /*
 501          * Weighted average of the signal strength from Beacon frames in the
 502          * current BSS. This is in units of 1/16 of the signal unit to maintain
 503          * accuracy and to speed up calculations, i.e., the value need to be
 504          * divided by 16 to get the actual value.
 505          */
 506         int ave_beacon_signal;
 507
 508         /*
 509          * Number of Beacon frames used in ave_beacon_signal. This can be used
 510          * to avoid generating less reliable cqm events that would be based
 511          * only on couple of received frames.
 512          */
 513         unsigned int count_beacon_signal;
 514
 515         /*
 516          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 517          * that triggered a cqm event. 0 indicates that no event has been
 518          * generated for the current association.
 519          */
 520         int last_cqm_event_signal;
 521
 522         /*
 523          * State variables for keeping track of RSSI of the AP currently
 524          * connected to and informing driver when RSSI has gone
 525          * below/above a certain threshold.
 526          */
 527         int rssi_min_thold, rssi_max_thold;
 528         int last_ave_beacon_signal;
 529
 530         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 531         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 532         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 533         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
 534
 535         /* TDLS support */
 536         u8 tdls_peer[ETH_ALEN] __aligned(2);
 537         struct delayed_work tdls_peer_del_work;
 538         struct sk_buff *orig_teardown_skb; /* The original teardown skb */
 539         struct sk_buff *teardown_skb; /* A copy to send through the AP */
 540         spinlock_t teardown_lock; /* To lock changing teardown_skb */
 541         bool tdls_chan_switch_prohibited;
 542
 543         /* WMM-AC TSPEC support */
 544         struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
 545         /* Use a separate work struct so that we can do something here
 546          * while the sdata->work is flushing the queues, for example.
 547          * otherwise, in scenarios where we hardly get any traffic out
 548          * on the BE queue, but there's a lot of VO traffic, we might
 549          * get stuck in a downgraded situation and flush takes forever.
 550          */
 551         struct delayed_work tx_tspec_wk;
 552 };
 553
 554 struct ieee80211_if_ibss {
 555         struct timer_list timer;
 556         struct work_struct csa_connection_drop_work;
 557
 558         unsigned long last_scan_completed;
 559
 560         u32 basic_rates;
 561
 562         bool fixed_bssid;
 563         bool fixed_channel;
 564         bool privacy;
 565
 566         bool control_port;
 567         bool userspace_handles_dfs;
 568
 569         u8 bssid[ETH_ALEN] __aligned(2);
 570         u8 ssid[IEEE80211_MAX_SSID_LEN];
 571         u8 ssid_len, ie_len;
 572         u8 *ie;
 573         struct cfg80211_chan_def chandef;
 574
 575         unsigned long ibss_join_req;
 576         /* probe response/beacon for IBSS */
 577         struct beacon_data __rcu *presp;
 578
 579         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 580         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 581
 582         spinlock_t incomplete_lock;
 583         struct list_head incomplete_stations;
 584
 585         enum {
 586                 IEEE80211_IBSS_MLME_SEARCH,
 587                 IEEE80211_IBSS_MLME_JOINED,
 588         } state;
 589 };
 590
 591 /**
 592  * struct ieee80211_if_ocb - OCB mode state
 593  *
 594  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
 595  * @wrkq_flags: OCB deferred task action
 596  * @incomplete_lock: delayed STA insertion lock
 597  * @incomplete_stations: list of STAs waiting for delayed insertion
 598  * @joined: indication if the interface is connected to an OCB network
 599  */
 600 struct ieee80211_if_ocb {
 601         struct timer_list housekeeping_timer;
 602         unsigned long wrkq_flags;
 603
 604         spinlock_t incomplete_lock;
 605         struct list_head incomplete_stations;
 606
 607         bool joined;
 608 };
 609
 610 /**
 611  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 612  *
 613  * these declarations define the interface, which enables
 614  * vendor-specific mesh synchronization
 615  *
 616  */
 617 struct ieee802_11_elems;
 618 struct ieee80211_mesh_sync_ops {
 619         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 620                              u16 stype,
 621                              struct ieee80211_mgmt *mgmt,
 622                              struct ieee802_11_elems *elems,
 623                              struct ieee80211_rx_status *rx_status);
 624
 625         /* should be called with beacon_data under RCU read lock */
 626         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata,
 627                             struct beacon_data *beacon);
 628         /* add other framework functions here */
 629 };
 630
 631 struct mesh_csa_settings {
 632         struct rcu_head rcu_head;
 633         struct cfg80211_csa_settings settings;
 634 };
 635
 636 struct ieee80211_if_mesh {
 637         struct timer_list housekeeping_timer;
 638         struct timer_list mesh_path_timer;
 639         struct timer_list mesh_path_root_timer;
 640
 641         unsigned long wrkq_flags;
 642         unsigned long mbss_changed;
 643
 644         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 645         size_t mesh_id_len;
 646         /* Active Path Selection Protocol Identifier */
 647         u8 mesh_pp_id;
 648         /* Active Path Selection Metric Identifier */
 649         u8 mesh_pm_id;
 650         /* Congestion Control Mode Identifier */
 651         u8 mesh_cc_id;
 652         /* Synchronization Protocol Identifier */
 653         u8 mesh_sp_id;
 654         /* Authentication Protocol Identifier */
 655         u8 mesh_auth_id;
 656         /* Local mesh Sequence Number */
 657         u32 sn;
 658         /* Last used PREQ ID */
 659         u32 preq_id;
 660         atomic_t mpaths;
 661         /* Timestamp of last SN update */
 662         unsigned long last_sn_update;
 663         /* Time when it's ok to send next PERR */
 664         unsigned long next_perr;
 665         /* Timestamp of last PREQ sent */
 666         unsigned long last_preq;
 667         struct mesh_rmc *rmc;
 668         spinlock_t mesh_preq_queue_lock;
 669         struct mesh_preq_queue preq_queue;
 670         int preq_queue_len;
 671         struct mesh_stats mshstats;
 672         struct mesh_config mshcfg;
 673         atomic_t estab_plinks;
 674         u32 mesh_seqnum;
 675         bool accepting_plinks;
 676         int num_gates;
 677         struct beacon_data __rcu *beacon;
 678         const u8 *ie;
 679         u8 ie_len;
 680         enum {
 681                 IEEE80211_MESH_SEC_NONE = 0x0,
 682                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 683                 IEEE80211_MESH_SEC_SECURED = 0x2,
 684         } security;
 685         bool user_mpm;
 686         /* Extensible Synchronization Framework */
 687         const struct ieee80211_mesh_sync_ops *sync_ops;
 688         s64 sync_offset_clockdrift_max;
 689         spinlock_t sync_offset_lock;
 690         bool adjusting_tbtt;
 691         /* mesh power save */
 692         enum nl80211_mesh_power_mode nonpeer_pm;
 693         int ps_peers_light_sleep;
 694         int ps_peers_deep_sleep;
 695         struct ps_data ps;
 696         /* Channel Switching Support */
 697         struct mesh_csa_settings __rcu *csa;
 698         enum {
 699                 IEEE80211_MESH_CSA_ROLE_NONE,
 700                 IEEE80211_MESH_CSA_ROLE_INIT,
 701                 IEEE80211_MESH_CSA_ROLE_REPEATER,
 702         } csa_role;
 703         u8 chsw_ttl;
 704         u16 pre_value;
 705
 706         /* offset from skb->data while building IE */
 707         int meshconf_offset;
 708 };
 709
 710 #ifdef CONFIG_MAC80211_MESH
 711 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 712         do { (msh)->mshstats.name++; } while (0)
 713 #else
 714 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 715         do { } while (0)
 716 #endif
 717
 718 /**
 719  * enum ieee80211_sub_if_data_flags - virtual interface flags
 720  *
 721  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 722  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 723  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 724  *      associated stations and deliver multicast frames both
 725  *      back to wireless media and to the local net stack.
 726  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 727  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 728  */
 729 enum ieee80211_sub_if_data_flags {
 730         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 731         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 732         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 733         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 734         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 735 };
 736
 737 /**
 738  * enum ieee80211_sdata_state_bits - virtual interface state bits
 739  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 740  *      mirrors netif_running() but is separate for interface type
 741  *      change handling while the interface is up
 742  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 743  *      mode, so queues are stopped
 744  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
 745  *      to offchannel, reset when offchannel returns
 746  */
 747 enum ieee80211_sdata_state_bits {
 748         SDATA_STATE_RUNNING,
 749         SDATA_STATE_OFFCHANNEL,
 750         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 751 };
 752
 753 /**
 754  * enum ieee80211_chanctx_mode - channel context configuration mode
 755  *
 756  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
 757  *      multiple interfaces
 758  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
 759  *      only by a single interface. This can be used for example for
 760  *      non-fixed channel IBSS.
 761  */
 762 enum ieee80211_chanctx_mode {
 763         IEEE80211_CHANCTX_SHARED,
 764         IEEE80211_CHANCTX_EXCLUSIVE
 765 };
 766
 767 /**
 768  * enum ieee80211_chanctx_replace_state - channel context replacement state
 769  *
 770  * This is used for channel context in-place reservations that require channel
 771  * context switch/swap.
 772  *
 773  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
 774  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
 775  *      by a (not yet registered) channel context pointed by %replace_ctx.
 776  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
 777  *      replaces an existing channel context pointed to by %replace_ctx.
 778  */
 779 enum ieee80211_chanctx_replace_state {
 780         IEEE80211_CHANCTX_REPLACE_NONE,
 781         IEEE80211_CHANCTX_WILL_BE_REPLACED,
 782         IEEE80211_CHANCTX_REPLACES_OTHER,
 783 };
 784
 785 struct ieee80211_chanctx {
 786         struct list_head list;
 787         struct rcu_head rcu_head;
 788
 789         struct list_head assigned_vifs;
 790         struct list_head reserved_vifs;
 791
 792         enum ieee80211_chanctx_replace_state replace_state;
 793         struct ieee80211_chanctx *replace_ctx;
 794
 795         enum ieee80211_chanctx_mode mode;
 796         bool driver_present;
 797
 798         struct ieee80211_chanctx_conf conf;
 799 };
 800
 801 struct mac80211_qos_map {
 802         struct cfg80211_qos_map qos_map;
 803         struct rcu_head rcu_head;
 804 };
 805
 806 enum txq_info_flags {
 807         IEEE80211_TXQ_STOP,
 808         IEEE80211_TXQ_AMPDU,
 809 };
 810
 811 struct txq_info {
 812         struct sk_buff_head queue;
 813         unsigned long flags;
 814
 815         /* keep last! */
 816         struct ieee80211_txq txq;
 817 };
 818
 819 struct ieee80211_sub_if_data {
 820         struct list_head list;
 821
 822         struct wireless_dev wdev;
 823
 824         /* keys */
 825         struct list_head key_list;
 826
 827         /* count for keys needing tailroom space allocation */
 828         int crypto_tx_tailroom_needed_cnt;
 829         int crypto_tx_tailroom_pending_dec;
 830         struct delayed_work dec_tailroom_needed_wk;
 831
 832         struct net_device *dev;
 833         struct ieee80211_local *local;
 834
 835         unsigned int flags;
 836
 837         unsigned long state;
 838
 839         char name[IFNAMSIZ];
 840
 841         /* Fragment table for host-based reassembly */
 842         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 843         unsigned int fragment_next;
 844
 845         /* TID bitmap for NoAck policy */
 846         u16 noack_map;
 847
 848         /* bit field of ACM bits (BIT(802.1D tag)) */
 849         u8 wmm_acm;
 850
 851         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 852         struct ieee80211_key __rcu *default_unicast_key;
 853         struct ieee80211_key __rcu *default_multicast_key;
 854         struct ieee80211_key __rcu *default_mgmt_key;
 855
 856         u16 sequence_number;
 857         __be16 control_port_protocol;
 858         bool control_port_no_encrypt;
 859         int encrypt_headroom;
 860
 861         atomic_t txqs_len[IEEE80211_NUM_ACS];
 862         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 863         struct mac80211_qos_map __rcu *qos_map;
 864
 865         struct work_struct csa_finalize_work;
 866         bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
 867         struct cfg80211_chan_def csa_chandef;
 868
 869         struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
 870         struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
 871
 872         /* context reservation -- protected with chanctx_mtx */
 873         struct ieee80211_chanctx *reserved_chanctx;
 874         struct cfg80211_chan_def reserved_chandef;
 875         bool reserved_radar_required;
 876         bool reserved_ready;
 877
 878         /* used to reconfigure hardware SM PS */
 879         struct work_struct recalc_smps;
 880
 881         struct work_struct work;
 882         struct sk_buff_head skb_queue;
 883
 884         u8 needed_rx_chains;
 885         enum ieee80211_smps_mode smps_mode;
 886
 887         int user_power_level; /* in dBm */
 888         int ap_power_level; /* in dBm */
 889
 890         bool radar_required;
 891         struct delayed_work dfs_cac_timer_work;
 892
 893         /*
 894          * AP this belongs to: self in AP mode and
 895          * corresponding AP in VLAN mode, NULL for
 896          * all others (might be needed later in IBSS)
 897          */
 898         struct ieee80211_if_ap *bss;
 899
 900         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 901         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 902
 903         bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
 904         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 905
 906         union {
 907                 struct ieee80211_if_ap ap;
 908                 struct ieee80211_if_wds wds;
 909                 struct ieee80211_if_vlan vlan;
 910                 struct ieee80211_if_managed mgd;
 911                 struct ieee80211_if_ibss ibss;
 912                 struct ieee80211_if_mesh mesh;
 913                 struct ieee80211_if_ocb ocb;
 914                 u32 mntr_flags;
 915         } u;
 916
 917 #ifdef CONFIG_MAC80211_DEBUGFS
 918         struct {
 919                 struct dentry *subdir_stations;
 920                 struct dentry *default_unicast_key;
 921                 struct dentry *default_multicast_key;
 922                 struct dentry *default_mgmt_key;
 923         } debugfs;
 924 #endif
 925
 926         /* must be last, dynamically sized area in this! */
 927         struct ieee80211_vif vif;
 928 };
 929
 930 static inline
 931 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 932 {
 933         return container_of(p, struct ieee80211_sub_if_data, vif);
 934 }
 935
 936 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
 937         __acquires(&sdata->wdev.mtx)
 938 {
 939         mutex_lock(&sdata->wdev.mtx);
 940         __acquire(&sdata->wdev.mtx);
 941 }
 942
 943 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
 944         __releases(&sdata->wdev.mtx)
 945 {
 946         mutex_unlock(&sdata->wdev.mtx);
 947         __release(&sdata->wdev.mtx);
 948 }
 949
 950 #define sdata_dereference(p, sdata) \
 951         rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
 952
 953 static inline void
 954 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
 955 {
 956         lockdep_assert_held(&sdata->wdev.mtx);
 957 }
 958
 959 static inline enum ieee80211_band
 960 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
 961 {
 962         enum ieee80211_band band = IEEE80211_BAND_2GHZ;
 963         struct ieee80211_chanctx_conf *chanctx_conf;
 964
 965         rcu_read_lock();
 966         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 967         if (!WARN_ON(!chanctx_conf))
 968                 band = chanctx_conf->def.chan->band;
 969         rcu_read_unlock();
 970
 971         return band;
 972 }
 973
 974 static inline int
 975 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
 976 {
 977         switch (chandef->width) {
 978         case NL80211_CHAN_WIDTH_5:
 979                 return 2;
 980         case NL80211_CHAN_WIDTH_10:
 981                 return 1;
 982         default:
 983                 return 0;
 984         }
 985 }
 986
 987 static inline int
 988 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
 989 {
 990         struct ieee80211_chanctx_conf *chanctx_conf;
 991         int shift = 0;
 992
 993         rcu_read_lock();
 994         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 995         if (chanctx_conf)
 996                 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
 997         rcu_read_unlock();
 998
 999         return shift;
1000 }
1001
1002 struct ieee80211_rx_agg {
1003         u8 addr[ETH_ALEN];
1004         u16 tid;
1005 };
1006
1007 enum sdata_queue_type {
1008         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
1009         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
1010         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
1011         IEEE80211_SDATA_QUEUE_RX_AGG_START      = 3,
1012         IEEE80211_SDATA_QUEUE_RX_AGG_STOP       = 4,
1013         IEEE80211_SDATA_QUEUE_TDLS_CHSW         = 5,
1014 };
1015
1016 enum {
1017         IEEE80211_RX_MSG        = 1,
1018         IEEE80211_TX_STATUS_MSG = 2,
1019 };
1020
1021 enum queue_stop_reason {
1022         IEEE80211_QUEUE_STOP_REASON_DRIVER,
1023         IEEE80211_QUEUE_STOP_REASON_PS,
1024         IEEE80211_QUEUE_STOP_REASON_CSA,
1025         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1026         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1027         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1028         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1029         IEEE80211_QUEUE_STOP_REASON_FLUSH,
1030         IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1031         IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1032
1033         IEEE80211_QUEUE_STOP_REASONS,
1034 };
1035
1036 #ifdef CONFIG_MAC80211_LEDS
1037 struct tpt_led_trigger {
1038         char name[32];
1039         const struct ieee80211_tpt_blink *blink_table;
1040         unsigned int blink_table_len;
1041         struct timer_list timer;
1042         unsigned long prev_traffic;
1043         unsigned long tx_bytes, rx_bytes;
1044         unsigned int active, want;
1045         bool running;
1046 };
1047 #endif
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         struct work_struct radar_detected_work;
1170
1171         /* number of RX chains the hardware has */
1172         u8 rx_chains;
1173
1174         int tx_headroom; /* required headroom for hardware/radiotap */
1175
1176         /* Tasklet and skb queue to process calls from IRQ mode. All frames
1177          * added to skb_queue will be processed, but frames in
1178          * skb_queue_unreliable may be dropped if the total length of these
1179          * queues increases over the limit. */
1180 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1181         struct tasklet_struct tasklet;
1182         struct sk_buff_head skb_queue;
1183         struct sk_buff_head skb_queue_unreliable;
1184
1185         spinlock_t rx_path_lock;
1186
1187         /* Station data */
1188         /*
1189          * The mutex only protects the list, hash table and
1190          * counter, reads are done with RCU.
1191          */
1192         struct mutex sta_mtx;
1193         spinlock_t tim_lock;
1194         unsigned long num_sta;
1195         struct list_head sta_list;
1196         struct rhashtable sta_hash;
1197         struct timer_list sta_cleanup;
1198         int sta_generation;
1199
1200         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1201         struct tasklet_struct tx_pending_tasklet;
1202
1203         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1204
1205         /* number of interfaces with allmulti RX */
1206         atomic_t iff_allmultis;
1207
1208         struct rate_control_ref *rate_ctrl;
1209
1210         struct crypto_cipher *wep_tx_tfm;
1211         struct crypto_cipher *wep_rx_tfm;
1212         u32 wep_iv;
1213
1214         /* see iface.c */
1215         struct list_head interfaces;
1216         struct mutex iflist_mtx;
1217
1218         /*
1219          * Key mutex, protects sdata's key_list and sta_info's
1220          * key pointers (write access, they're RCU.)
1221          */
1222         struct mutex key_mtx;
1223
1224         /* mutex for scan and work locking */
1225         struct mutex mtx;
1226
1227         /* Scanning and BSS list */
1228         unsigned long scanning;
1229         struct cfg80211_ssid scan_ssid;
1230         struct cfg80211_scan_request *int_scan_req;
1231         struct cfg80211_scan_request __rcu *scan_req;
1232         struct ieee80211_scan_request *hw_scan_req;
1233         struct cfg80211_chan_def scan_chandef;
1234         enum ieee80211_band hw_scan_band;
1235         int scan_channel_idx;
1236         int scan_ies_len;
1237         int hw_scan_ies_bufsize;
1238
1239         struct work_struct sched_scan_stopped_work;
1240         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1241         struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1242         u8 scan_addr[ETH_ALEN];
1243
1244         unsigned long leave_oper_channel_time;
1245         enum mac80211_scan_state next_scan_state;
1246         struct delayed_work scan_work;
1247         struct ieee80211_sub_if_data __rcu *scan_sdata;
1248         /* For backward compatibility only -- do not use */
1249         struct cfg80211_chan_def _oper_chandef;
1250
1251         /* Temporary remain-on-channel for off-channel operations */
1252         struct ieee80211_channel *tmp_channel;
1253
1254         /* channel contexts */
1255         struct list_head chanctx_list;
1256         struct mutex chanctx_mtx;
1257
1258 #ifdef CONFIG_MAC80211_LEDS
1259         struct led_trigger tx_led, rx_led, assoc_led, radio_led;
1260         struct led_trigger tpt_led;
1261         atomic_t tx_led_active, rx_led_active, assoc_led_active;
1262         atomic_t radio_led_active, tpt_led_active;
1263         struct tpt_led_trigger *tpt_led_trigger;
1264 #endif
1265
1266 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1267         /* SNMP counters */
1268         /* dot11CountersTable */
1269         u32 dot11TransmittedFragmentCount;
1270         u32 dot11MulticastTransmittedFrameCount;
1271         u32 dot11FailedCount;
1272         u32 dot11RetryCount;
1273         u32 dot11MultipleRetryCount;
1274         u32 dot11FrameDuplicateCount;
1275         u32 dot11ReceivedFragmentCount;
1276         u32 dot11MulticastReceivedFrameCount;
1277         u32 dot11TransmittedFrameCount;
1278
1279         /* TX/RX handler statistics */
1280         unsigned int tx_handlers_drop;
1281         unsigned int tx_handlers_queued;
1282         unsigned int tx_handlers_drop_wep;
1283         unsigned int tx_handlers_drop_not_assoc;
1284         unsigned int tx_handlers_drop_unauth_port;
1285         unsigned int rx_handlers_drop;
1286         unsigned int rx_handlers_queued;
1287         unsigned int rx_handlers_drop_nullfunc;
1288         unsigned int rx_handlers_drop_defrag;
1289         unsigned int rx_handlers_drop_short;
1290         unsigned int tx_expand_skb_head;
1291         unsigned int tx_expand_skb_head_cloned;
1292         unsigned int rx_expand_skb_head_defrag;
1293         unsigned int rx_handlers_fragments;
1294         unsigned int tx_status_drop;
1295 #define I802_DEBUG_INC(c) (c)++
1296 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1297 #define I802_DEBUG_INC(c) do { } while (0)
1298 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1299
1300
1301         int total_ps_buffered; /* total number of all buffered unicast and
1302                                 * multicast packets for power saving stations
1303                                 */
1304
1305         bool pspolling;
1306         bool offchannel_ps_enabled;
1307         /*
1308          * PS can only be enabled when we have exactly one managed
1309          * interface (and monitors) in PS, this then points there.
1310          */
1311         struct ieee80211_sub_if_data *ps_sdata;
1312         struct work_struct dynamic_ps_enable_work;
1313         struct work_struct dynamic_ps_disable_work;
1314         struct timer_list dynamic_ps_timer;
1315         struct notifier_block network_latency_notifier;
1316         struct notifier_block ifa_notifier;
1317         struct notifier_block ifa6_notifier;
1318
1319         /*
1320          * The dynamic ps timeout configured from user space via WEXT -
1321          * this will override whatever chosen by mac80211 internally.
1322          */
1323         int dynamic_ps_forced_timeout;
1324
1325         int user_power_level; /* in dBm, for all interfaces */
1326
1327         enum ieee80211_smps_mode smps_mode;
1328
1329         struct work_struct restart_work;
1330
1331 #ifdef CONFIG_MAC80211_DEBUGFS
1332         struct local_debugfsdentries {
1333                 struct dentry *rcdir;
1334                 struct dentry *keys;
1335         } debugfs;
1336 #endif
1337
1338         /*
1339          * Remain-on-channel support
1340          */
1341         struct list_head roc_list;
1342         struct work_struct hw_roc_start, hw_roc_done;
1343         unsigned long hw_roc_start_time;
1344         u64 roc_cookie_counter;
1345
1346         struct idr ack_status_frames;
1347         spinlock_t ack_status_lock;
1348
1349         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1350
1351         struct napi_struct *napi;
1352
1353         /* virtual monitor interface */
1354         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1355         struct cfg80211_chan_def monitor_chandef;
1356
1357         /* extended capabilities provided by mac80211 */
1358         u8 ext_capa[8];
1359 };
1360
1361 static inline struct ieee80211_sub_if_data *
1362 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1363 {
1364         return netdev_priv(dev);
1365 }
1366
1367 static inline struct ieee80211_sub_if_data *
1368 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1369 {
1370         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1371 }
1372
1373 /* this struct represents 802.11n's RA/TID combination */
1374 struct ieee80211_ra_tid {
1375         u8 ra[ETH_ALEN];
1376         u16 tid;
1377 };
1378
1379 /* this struct holds the value parsing from channel switch IE  */
1380 struct ieee80211_csa_ie {
1381         struct cfg80211_chan_def chandef;
1382         u8 mode;
1383         u8 count;
1384         u8 ttl;
1385         u16 pre_value;
1386 };
1387
1388 /* Parsed Information Elements */
1389 struct ieee802_11_elems {
1390         const u8 *ie_start;
1391         size_t total_len;
1392
1393         /* pointers to IEs */
1394         const struct ieee80211_tdls_lnkie *lnk_id;
1395         const struct ieee80211_ch_switch_timing *ch_sw_timing;
1396         const u8 *ext_capab;
1397         const u8 *ssid;
1398         const u8 *supp_rates;
1399         const u8 *ds_params;
1400         const struct ieee80211_tim_ie *tim;
1401         const u8 *challenge;
1402         const u8 *rsn;
1403         const u8 *erp_info;
1404         const u8 *ext_supp_rates;
1405         const u8 *wmm_info;
1406         const u8 *wmm_param;
1407         const struct ieee80211_ht_cap *ht_cap_elem;
1408         const struct ieee80211_ht_operation *ht_operation;
1409         const struct ieee80211_vht_cap *vht_cap_elem;
1410         const struct ieee80211_vht_operation *vht_operation;
1411         const struct ieee80211_meshconf_ie *mesh_config;
1412         const u8 *mesh_id;
1413         const u8 *peering;
1414         const __le16 *awake_window;
1415         const u8 *preq;
1416         const u8 *prep;
1417         const u8 *perr;
1418         const struct ieee80211_rann_ie *rann;
1419         const struct ieee80211_channel_sw_ie *ch_switch_ie;
1420         const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1421         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1422         const u8 *country_elem;
1423         const u8 *pwr_constr_elem;
1424         const u8 *cisco_dtpc_elem;
1425         const struct ieee80211_timeout_interval_ie *timeout_int;
1426         const u8 *opmode_notif;
1427         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1428         const struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1429
1430         /* length of them, respectively */
1431         u8 ext_capab_len;
1432         u8 ssid_len;
1433         u8 supp_rates_len;
1434         u8 tim_len;
1435         u8 challenge_len;
1436         u8 rsn_len;
1437         u8 ext_supp_rates_len;
1438         u8 wmm_info_len;
1439         u8 wmm_param_len;
1440         u8 mesh_id_len;
1441         u8 peering_len;
1442         u8 preq_len;
1443         u8 prep_len;
1444         u8 perr_len;
1445         u8 country_elem_len;
1446
1447         /* whether a parse error occurred while retrieving these elements */
1448         bool parse_error;
1449 };
1450
1451 static inline struct ieee80211_local *hw_to_local(
1452         struct ieee80211_hw *hw)
1453 {
1454         return container_of(hw, struct ieee80211_local, hw);
1455 }
1456
1457 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1458 {
1459         return container_of(txq, struct txq_info, txq);
1460 }
1461
1462 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1463 {
1464         return ether_addr_equal(raddr, addr) ||
1465                is_broadcast_ether_addr(raddr);
1466 }
1467
1468 static inline bool
1469 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1470 {
1471         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1472                      status->flag & RX_FLAG_MACTIME_END);
1473         return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1474 }
1475
1476 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1477                                      struct ieee80211_rx_status *status,
1478                                      unsigned int mpdu_len,
1479                                      unsigned int mpdu_offset);
1480 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1481 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1482 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1483                                       u32 changed);
1484 void ieee80211_configure_filter(struct ieee80211_local *local);
1485 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1486
1487 /* STA code */
1488 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1489 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1490                        struct cfg80211_auth_request *req);
1491 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1492                         struct cfg80211_assoc_request *req);
1493 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1494                          struct cfg80211_deauth_request *req);
1495 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1496                            struct cfg80211_disassoc_request *req);
1497 void ieee80211_send_pspoll(struct ieee80211_local *local,
1498                            struct ieee80211_sub_if_data *sdata);
1499 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1500 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1501 int ieee80211_max_network_latency(struct notifier_block *nb,
1502                                   unsigned long data, void *dummy);
1503 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1504 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1505 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1506                                   struct sk_buff *skb);
1507 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1508 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1509 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1510 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1511                                   __le16 fc, bool acked);
1512 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1513 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1514 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1515
1516 /* IBSS code */
1517 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1518 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1519 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1520                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1521 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1522                         struct cfg80211_ibss_params *params);
1523 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1524 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1525 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1526                                    struct sk_buff *skb);
1527 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1528                               struct cfg80211_csa_settings *csa_settings);
1529 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1530 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1531
1532 /* OCB code */
1533 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1534 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1535                              const u8 *bssid, const u8 *addr, u32 supp_rates);
1536 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1537 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1538                        struct ocb_setup *setup);
1539 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1540
1541 /* mesh code */
1542 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1543 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1544                                    struct sk_buff *skb);
1545 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1546                               struct cfg80211_csa_settings *csa_settings);
1547 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1548
1549 /* scan/BSS handling */
1550 void ieee80211_scan_work(struct work_struct *work);
1551 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1552                                 const u8 *ssid, u8 ssid_len,
1553                                 struct ieee80211_channel **channels,
1554                                 unsigned int n_channels,
1555                                 enum nl80211_bss_scan_width scan_width);
1556 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1557                            struct cfg80211_scan_request *req);
1558 void ieee80211_scan_cancel(struct ieee80211_local *local);
1559 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1560 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1561
1562 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1563 struct ieee80211_bss *
1564 ieee80211_bss_info_update(struct ieee80211_local *local,
1565                           struct ieee80211_rx_status *rx_status,
1566                           struct ieee80211_mgmt *mgmt,
1567                           size_t len,
1568                           struct ieee802_11_elems *elems,
1569                           struct ieee80211_channel *channel);
1570 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1571                           struct ieee80211_bss *bss);
1572
1573 /* scheduled scan handling */
1574 int
1575 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1576                                      struct cfg80211_sched_scan_request *req);
1577 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1578                                        struct cfg80211_sched_scan_request *req);
1579 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1580 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1581 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1582
1583 /* off-channel helpers */
1584 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1585 void ieee80211_offchannel_return(struct ieee80211_local *local);
1586 void ieee80211_roc_setup(struct ieee80211_local *local);
1587 void ieee80211_start_next_roc(struct ieee80211_local *local);
1588 void ieee80211_roc_purge(struct ieee80211_local *local,
1589                          struct ieee80211_sub_if_data *sdata);
1590 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
1591 void ieee80211_sw_roc_work(struct work_struct *work);
1592 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1593
1594 /* channel switch handling */
1595 void ieee80211_csa_finalize_work(struct work_struct *work);
1596 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1597                              struct cfg80211_csa_settings *params);
1598
1599 /* interface handling */
1600 int ieee80211_iface_init(void);
1601 void ieee80211_iface_exit(void);
1602 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1603                      unsigned char name_assign_type,
1604                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1605                      struct vif_params *params);
1606 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1607                              enum nl80211_iftype type);
1608 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1609 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1610 u32 ieee80211_idle_off(struct ieee80211_local *local);
1611 void ieee80211_recalc_idle(struct ieee80211_local *local);
1612 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1613                                     const int offset);
1614 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1615 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1616 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1617 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1618
1619 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1620 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1621                               bool update_bss);
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 void ieee80211_check_fast_xmit(struct sta_info *sta);
1645 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local);
1646 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata);
1647 void ieee80211_clear_fast_xmit(struct sta_info *sta);
1648
1649 /* HT */
1650 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1651                                      struct ieee80211_sta_ht_cap *ht_cap);
1652 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1653                                        struct ieee80211_supported_band *sband,
1654                                        const struct ieee80211_ht_cap *ht_cap_ie,
1655                                        struct sta_info *sta);
1656 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1657                           const u8 *da, u16 tid,
1658                           u16 initiator, u16 reason_code);
1659 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1660                                enum ieee80211_smps_mode smps, const u8 *da,
1661                                const u8 *bssid);
1662 void ieee80211_request_smps_ap_work(struct work_struct *work);
1663 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1664 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1665                                    enum ieee80211_smps_mode smps_mode_new);
1666
1667 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1668                                      u16 initiator, u16 reason, bool stop);
1669 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1670                                     u16 initiator, u16 reason, bool stop);
1671 void __ieee80211_start_rx_ba_session(struct sta_info *sta,
1672                                      u8 dialog_token, u16 timeout,
1673                                      u16 start_seq_num, u16 ba_policy, u16 tid,
1674                                      u16 buf_size, bool tx, bool auto_seq);
1675 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1676                                          enum ieee80211_agg_stop_reason reason);
1677 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1678                              struct sta_info *sta,
1679                              struct ieee80211_mgmt *mgmt, size_t len);
1680 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1681                                   struct sta_info *sta,
1682                                   struct ieee80211_mgmt *mgmt,
1683                                   size_t len);
1684 void ieee80211_process_addba_request(struct ieee80211_local *local,
1685                                      struct sta_info *sta,
1686                                      struct ieee80211_mgmt *mgmt,
1687                                      size_t len);
1688
1689 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1690                                    enum ieee80211_agg_stop_reason reason);
1691 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1692                                     enum ieee80211_agg_stop_reason reason);
1693 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1694 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1695 void ieee80211_ba_session_work(struct work_struct *work);
1696 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1697 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1698
1699 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1700
1701 /* VHT */
1702 void
1703 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1704                                     struct ieee80211_supported_band *sband,
1705                                     const struct ieee80211_vht_cap *vht_cap_ie,
1706                                     struct sta_info *sta);
1707 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
1708 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1709 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1710 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1711                                   struct sta_info *sta, u8 opmode,
1712                                   enum ieee80211_band band, bool nss_only);
1713 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1714                                  struct sta_info *sta, u8 opmode,
1715                                  enum ieee80211_band band, bool nss_only);
1716 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1717                                       struct ieee80211_sta_vht_cap *vht_cap);
1718
1719 /* Spectrum management */
1720 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1721                                        struct ieee80211_mgmt *mgmt,
1722                                        size_t len);
1723 /**
1724  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1725  * @sdata: the sdata of the interface which has received the frame
1726  * @elems: parsed 802.11 elements received with the frame
1727  * @current_band: indicates the current band
1728  * @sta_flags: contains information about own capabilities and restrictions
1729  *      to decide which channel switch announcements can be accepted. Only the
1730  *      following subset of &enum ieee80211_sta_flags are evaluated:
1731  *      %IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1732  *      %IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1733  *      %IEEE80211_STA_DISABLE_160MHZ.
1734  * @bssid: the currently connected bssid (for reporting)
1735  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1736         All of them will be filled with if success only.
1737  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1738  */
1739 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1740                                  struct ieee802_11_elems *elems,
1741                                  enum ieee80211_band current_band,
1742                                  u32 sta_flags, u8 *bssid,
1743                                  struct ieee80211_csa_ie *csa_ie);
1744
1745 /* Suspend/resume and hw reconfiguration */
1746 int ieee80211_reconfig(struct ieee80211_local *local);
1747 void ieee80211_stop_device(struct ieee80211_local *local);
1748
1749 int __ieee80211_suspend(struct ieee80211_hw *hw,
1750                         struct cfg80211_wowlan *wowlan);
1751
1752 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1753 {
1754         struct ieee80211_local *local = hw_to_local(hw);
1755
1756         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
1757              !test_bit(SCAN_COMPLETED, &local->scanning),
1758                 "%s: resume with hardware scan still in progress\n",
1759                 wiphy_name(hw->wiphy));
1760
1761         return ieee80211_reconfig(hw_to_local(hw));
1762 }
1763
1764 /* utility functions/constants */
1765 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1766 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1767                         enum nl80211_iftype type);
1768 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1769                              int rate, int erp, int short_preamble,
1770                              int shift);
1771 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1772                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1773                                      gfp_t gfp);
1774 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1775                                bool bss_notify);
1776 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1777                     struct sta_info *sta, struct sk_buff *skb);
1778
1779 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1780                                  struct sk_buff *skb, int tid,
1781                                  enum ieee80211_band band);
1782
1783 static inline void
1784 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1785                           struct sk_buff *skb, int tid,
1786                           enum ieee80211_band band)
1787 {
1788         rcu_read_lock();
1789         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1790         rcu_read_unlock();
1791 }
1792
1793 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1794                                         struct sk_buff *skb, int tid)
1795 {
1796         struct ieee80211_chanctx_conf *chanctx_conf;
1797
1798         rcu_read_lock();
1799         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1800         if (WARN_ON(!chanctx_conf)) {
1801                 rcu_read_unlock();
1802                 kfree_skb(skb);
1803                 return;
1804         }
1805
1806         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1807                                     chanctx_conf->def.chan->band);
1808         rcu_read_unlock();
1809 }
1810
1811 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1812                                     struct sk_buff *skb)
1813 {
1814         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1815         ieee80211_tx_skb_tid(sdata, skb, 7);
1816 }
1817
1818 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1819                                struct ieee802_11_elems *elems,
1820                                u64 filter, u32 crc);
1821 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1822                                           bool action,
1823                                           struct ieee802_11_elems *elems)
1824 {
1825         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1826 }
1827
1828 static inline bool ieee80211_rx_reorder_ready(struct sk_buff_head *frames)
1829 {
1830         struct sk_buff *tail = skb_peek_tail(frames);
1831         struct ieee80211_rx_status *status;
1832
1833         if (!tail)
1834                 return false;
1835
1836         status = IEEE80211_SKB_RXCB(tail);
1837         if (status->flag & RX_FLAG_AMSDU_MORE)
1838                 return false;
1839
1840         return true;
1841 }
1842
1843 extern const int ieee802_1d_to_ac[8];
1844
1845 static inline int ieee80211_ac_from_tid(int tid)
1846 {
1847         return ieee802_1d_to_ac[tid & 7];
1848 }
1849
1850 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1851 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1852 void ieee80211_dynamic_ps_timer(unsigned long data);
1853 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1854                              struct ieee80211_sub_if_data *sdata,
1855                              int powersave);
1856 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1857                              struct ieee80211_hdr *hdr);
1858 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1859                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
1860
1861 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1862                                      unsigned long queues,
1863                                      enum queue_stop_reason reason,
1864                                      bool refcounted);
1865 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
1866                                struct ieee80211_sub_if_data *sdata,
1867                                enum queue_stop_reason reason);
1868 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
1869                                struct ieee80211_sub_if_data *sdata,
1870                                enum queue_stop_reason reason);
1871 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1872                                      unsigned long queues,
1873                                      enum queue_stop_reason reason,
1874                                      bool refcounted);
1875 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1876                                     enum queue_stop_reason reason,
1877                                     bool refcounted);
1878 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1879                                     enum queue_stop_reason reason,
1880                                     bool refcounted);
1881 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1882 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1883                                struct sk_buff *skb);
1884 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1885                                 struct sk_buff_head *skbs);
1886 void ieee80211_flush_queues(struct ieee80211_local *local,
1887                             struct ieee80211_sub_if_data *sdata, bool drop);
1888 void __ieee80211_flush_queues(struct ieee80211_local *local,
1889                               struct ieee80211_sub_if_data *sdata,
1890                               unsigned int queues, bool drop);
1891
1892 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
1893 {
1894         /*
1895          * If quiescing is set, we are racing with __ieee80211_suspend.
1896          * __ieee80211_suspend flushes the workers after setting quiescing,
1897          * and we check quiescing / suspended before enqueing new workers.
1898          * We should abort the worker to avoid the races below.
1899          */
1900         if (local->quiescing)
1901                 return false;
1902
1903         /*
1904          * We might already be suspended if the following scenario occurs:
1905          * __ieee80211_suspend          Control path
1906          *
1907          *                              if (local->quiescing)
1908          *                                      return;
1909          * local->quiescing = true;
1910          * flush_workqueue();
1911          *                              queue_work(...);
1912          * local->suspended = true;
1913          * local->quiescing = false;
1914          *                              worker starts running...
1915          */
1916         if (local->suspended)
1917                 return false;
1918
1919         return true;
1920 }
1921
1922 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
1923                              struct sta_info *sta,
1924                              struct txq_info *txq, int tid);
1925 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1926                          u16 transaction, u16 auth_alg, u16 status,
1927                          const u8 *extra, size_t extra_len, const u8 *bssid,
1928                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1929                          u32 tx_flags);
1930 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1931                                     const u8 *bssid, u16 stype, u16 reason,
1932                                     bool send_frame, u8 *frame_buf);
1933 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1934                              size_t buffer_len,
1935                              struct ieee80211_scan_ies *ie_desc,
1936                              const u8 *ie, size_t ie_len,
1937                              u8 bands_used, u32 *rate_masks,
1938                              struct cfg80211_chan_def *chandef);
1939 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1940                                           const u8 *src, const u8 *dst,
1941                                           u32 ratemask,
1942                                           struct ieee80211_channel *chan,
1943                                           const u8 *ssid, size_t ssid_len,
1944                                           const u8 *ie, size_t ie_len,
1945                                           bool directed);
1946 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1947                               const u8 *src, const u8 *dst,
1948                               const u8 *ssid, size_t ssid_len,
1949                               const u8 *ie, size_t ie_len,
1950                               u32 ratemask, bool directed, u32 tx_flags,
1951                               struct ieee80211_channel *channel, bool scan);
1952
1953 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1954                             struct ieee802_11_elems *elems,
1955                             enum ieee80211_band band, u32 *basic_rates);
1956 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
1957                                  enum ieee80211_smps_mode smps_mode);
1958 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
1959                                 enum ieee80211_smps_mode smps_mode);
1960 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1961 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
1962
1963 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1964 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1965                               u16 cap);
1966 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1967                                const struct cfg80211_chan_def *chandef,
1968                                u16 prot_mode);
1969 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1970                                u32 cap);
1971 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1972                                 const struct cfg80211_chan_def *chandef);
1973 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
1974                              const struct ieee80211_supported_band *sband,
1975                              const u8 *srates, int srates_len, u32 *rates);
1976 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1977                             struct sk_buff *skb, bool need_basic,
1978                             enum ieee80211_band band);
1979 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1980                                 struct sk_buff *skb, bool need_basic,
1981                                 enum ieee80211_band band);
1982 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
1983
1984 /* channel management */
1985 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1986                                   const struct ieee80211_ht_operation *ht_oper,
1987                                   struct cfg80211_chan_def *chandef);
1988 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
1989                                    const struct ieee80211_vht_operation *oper,
1990                                    struct cfg80211_chan_def *chandef);
1991 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
1992
1993 int __must_check
1994 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1995                           const struct cfg80211_chan_def *chandef,
1996                           enum ieee80211_chanctx_mode mode);
1997 int __must_check
1998 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
1999                               const struct cfg80211_chan_def *chandef,
2000                               enum ieee80211_chanctx_mode mode,
2001                               bool radar_required);
2002 int __must_check
2003 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
2004 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
2005
2006 int __must_check
2007 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
2008                                const struct cfg80211_chan_def *chandef,
2009                                u32 *changed);
2010 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
2011 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2012 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2013                                          bool clear);
2014 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2015                                struct ieee80211_chanctx *ctx);
2016
2017 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2018                                    struct ieee80211_chanctx *chanctx);
2019 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2020                                       struct ieee80211_chanctx *ctx);
2021 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2022
2023 void ieee80211_dfs_cac_timer(unsigned long data);
2024 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2025 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2026 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2027 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2028                               struct cfg80211_csa_settings *csa_settings);
2029
2030 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2031 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2032 const struct ieee80211_cipher_scheme *
2033 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2034                  enum nl80211_iftype iftype);
2035 int ieee80211_cs_headroom(struct ieee80211_local *local,
2036                           struct cfg80211_crypto_settings *crypto,
2037                           enum nl80211_iftype iftype);
2038 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2039                            struct ieee80211_sub_if_data *sdata);
2040 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2041                                  const struct cfg80211_chan_def *chandef,
2042                                  enum ieee80211_chanctx_mode chanmode,
2043                                  u8 radar_detect);
2044 int ieee80211_max_num_channels(struct ieee80211_local *local);
2045
2046 /* TDLS */
2047 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2048                         const u8 *peer, u8 action_code, u8 dialog_token,
2049                         u16 status_code, u32 peer_capability,
2050                         bool initiator, const u8 *extra_ies,
2051                         size_t extra_ies_len);
2052 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2053                         const u8 *peer, enum nl80211_tdls_operation oper);
2054 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2055 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2056                                   const u8 *addr, u8 oper_class,
2057                                   struct cfg80211_chan_def *chandef);
2058 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2059                                           struct net_device *dev,
2060                                           const u8 *addr);
2061 void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2062                                            struct sk_buff *skb);
2063
2064 extern const struct ethtool_ops ieee80211_ethtool_ops;
2065
2066 #ifdef CONFIG_MAC80211_NOINLINE
2067 #define debug_noinline noinline
2068 #else
2069 #define debug_noinline
2070 #endif
2071
2072 #endif /* IEEE80211_I_H */