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  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef IEEE80211_I_H
  13 #define IEEE80211_I_H
  14
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/leds.h>
  27 #include <linux/idr.h>
  28 #include <net/ieee80211_radiotap.h>
  29 #include <net/cfg80211.h>
  30 #include <net/mac80211.h>
  31 #include "key.h"
  32 #include "sta_info.h"
  33 #include "debug.h"
  34
  35 struct ieee80211_local;
  36
  37 /* Maximum number of broadcast/multicast frames to buffer when some of the
  38  * associated stations are using power saving. */
  39 #define AP_MAX_BC_BUFFER 128
  40
  41 /* Maximum number of frames buffered to all STAs, including multicast frames.
  42  * Note: increasing this limit increases the potential memory requirement. Each
  43  * frame can be up to about 2 kB long. */
  44 #define TOTAL_MAX_TX_BUFFER 512
  45
  46 /* Required encryption head and tailroom */
  47 #define IEEE80211_ENCRYPT_HEADROOM 8
  48 #define IEEE80211_ENCRYPT_TAILROOM 18
  49
  50 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  51  * reception of at least three fragmented frames. This limit can be increased
  52  * by changing this define, at the cost of slower frame reassembly and
  53  * increased memory use (about 2 kB of RAM per entry). */
  54 #define IEEE80211_FRAGMENT_MAX 4
  55
  56 #define TU_TO_JIFFIES(x)        (usecs_to_jiffies((x) * 1024))
  57 #define TU_TO_EXP_TIME(x)       (jiffies + TU_TO_JIFFIES(x))
  58
  59 /* power level hasn't been configured (or set to automatic) */
  60 #define IEEE80211_UNSET_POWER_LEVEL     INT_MIN
  61
  62 /*
  63  * Some APs experience problems when working with U-APSD. Decrease the
  64  * probability of that happening by using legacy mode for all ACs but VO.
  65  * The AP that caused us trouble was a Cisco 4410N. It ignores our
  66  * setting, and always treats non-VO ACs as legacy.
  67  */
  68 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
  69         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
  70
  71 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  72         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  73
  74 #define IEEE80211_DEAUTH_FRAME_LEN      (24 /* hdr */ + 2 /* reason */)
  75
  76 struct ieee80211_fragment_entry {
  77         unsigned long first_frag_time;
  78         unsigned int seq;
  79         unsigned int rx_queue;
  80         unsigned int last_frag;
  81         unsigned int extra_len;
  82         struct sk_buff_head skb_list;
  83         int ccmp; /* Whether fragments were encrypted with CCMP */
  84         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  85 };
  86
  87
  88 struct ieee80211_bss {
  89         u32 device_ts_beacon, device_ts_presp;
  90
  91         bool wmm_used;
  92         bool uapsd_supported;
  93
  94 #define IEEE80211_MAX_SUPP_RATES 32
  95         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  96         size_t supp_rates_len;
  97
  98         /*
  99          * During association, we save an ERP value from a probe response so
 100          * that we can feed ERP info to the driver when handling the
 101          * association completes. these fields probably won't be up-to-date
 102          * otherwise, you probably don't want to use them.
 103          */
 104         bool has_erp_value;
 105         u8 erp_value;
 106
 107         /* Keep track of the corruption of the last beacon/probe response. */
 108         u8 corrupt_data;
 109
 110         /* Keep track of what bits of information we have valid info for. */
 111         u8 valid_data;
 112 };
 113
 114 /**
 115  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
 116  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
 117  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
 118  *
 119  * These are bss flags that are attached to a bss in the
 120  * @corrupt_data field of &struct ieee80211_bss.
 121  */
 122 enum ieee80211_bss_corrupt_data_flags {
 123         IEEE80211_BSS_CORRUPT_BEACON            = BIT(0),
 124         IEEE80211_BSS_CORRUPT_PROBE_RESP        = BIT(1)
 125 };
 126
 127 /**
 128  * enum ieee80211_valid_data_flags - BSS valid data flags
 129  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
 130  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
 131  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
 132  *
 133  * These are bss flags that are attached to a bss in the
 134  * @valid_data field of &struct ieee80211_bss.  They show which parts
 135  * of the data structure were recieved as a result of an un-corrupted
 136  * beacon/probe response.
 137  */
 138 enum ieee80211_bss_valid_data_flags {
 139         IEEE80211_BSS_VALID_WMM                 = BIT(1),
 140         IEEE80211_BSS_VALID_RATES               = BIT(2),
 141         IEEE80211_BSS_VALID_ERP                 = BIT(3)
 142 };
 143
 144 typedef unsigned __bitwise__ ieee80211_tx_result;
 145 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 146 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 147 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 148
 149 #define IEEE80211_TX_UNICAST            BIT(1)
 150 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 151
 152 struct ieee80211_tx_data {
 153         struct sk_buff *skb;
 154         struct sk_buff_head skbs;
 155         struct ieee80211_local *local;
 156         struct ieee80211_sub_if_data *sdata;
 157         struct sta_info *sta;
 158         struct ieee80211_key *key;
 159
 160         unsigned int flags;
 161 };
 162
 163
 164 typedef unsigned __bitwise__ ieee80211_rx_result;
 165 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 166 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 167 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 168 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 169
 170 /**
 171  * enum ieee80211_packet_rx_flags - packet RX flags
 172  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
 173  *      (incl. multicast frames)
 174  * @IEEE80211_RX_FRAGMENTED: fragmented frame
 175  * @IEEE80211_RX_AMSDU: a-MSDU packet
 176  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 177  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 178  *
 179  * These are per-frame flags that are attached to a frame in the
 180  * @rx_flags field of &struct ieee80211_rx_status.
 181  */
 182 enum ieee80211_packet_rx_flags {
 183         IEEE80211_RX_RA_MATCH                   = BIT(1),
 184         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 185         IEEE80211_RX_AMSDU                      = BIT(3),
 186         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 187         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 188 };
 189
 190 /**
 191  * enum ieee80211_rx_flags - RX data flags
 192  *
 193  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 194  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 195  *      to cfg80211_report_obss_beacon().
 196  *
 197  * These flags are used across handling multiple interfaces
 198  * for a single frame.
 199  */
 200 enum ieee80211_rx_flags {
 201         IEEE80211_RX_CMNTR              = BIT(0),
 202         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 203 };
 204
 205 struct ieee80211_rx_data {
 206         struct sk_buff *skb;
 207         struct ieee80211_local *local;
 208         struct ieee80211_sub_if_data *sdata;
 209         struct sta_info *sta;
 210         struct ieee80211_key *key;
 211
 212         unsigned int flags;
 213
 214         /*
 215          * Index into sequence numbers array, 0..16
 216          * since the last (16) is used for non-QoS,
 217          * will be 16 on non-QoS frames.
 218          */
 219         int seqno_idx;
 220
 221         /*
 222          * Index into the security IV/PN arrays, 0..16
 223          * since the last (16) is used for CCMP-encrypted
 224          * management frames, will be set to 16 on mgmt
 225          * frames and 0 on non-QoS frames.
 226          */
 227         int security_idx;
 228
 229         u32 tkip_iv32;
 230         u16 tkip_iv16;
 231 };
 232
 233 struct beacon_data {
 234         u8 *head, *tail;
 235         int head_len, tail_len;
 236         struct rcu_head rcu_head;
 237 };
 238
 239 struct probe_resp {
 240         struct rcu_head rcu_head;
 241         int len;
 242         u8 data[0];
 243 };
 244
 245 struct ps_data {
 246         /* yes, this looks ugly, but guarantees that we can later use
 247          * bitmap_empty :)
 248          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 249         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 250         struct sk_buff_head bc_buf;
 251         atomic_t num_sta_ps; /* number of stations in PS mode */
 252         int dtim_count;
 253         bool dtim_bc_mc;
 254 };
 255
 256 struct ieee80211_if_ap {
 257         struct beacon_data __rcu *beacon;
 258         struct probe_resp __rcu *probe_resp;
 259
 260         struct list_head vlans;
 261
 262         struct ps_data ps;
 263         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 264 };
 265
 266 struct ieee80211_if_wds {
 267         struct sta_info *sta;
 268         u8 remote_addr[ETH_ALEN];
 269 };
 270
 271 struct ieee80211_if_vlan {
 272         struct list_head list;
 273
 274         /* used for all tx if the VLAN is configured to 4-addr mode */
 275         struct sta_info __rcu *sta;
 276 };
 277
 278 struct mesh_stats {
 279         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 280         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 281         __u32 fwded_frames;             /* Mesh total forwarded frames */
 282         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 283         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 284         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 285 };
 286
 287 #define PREQ_Q_F_START          0x1
 288 #define PREQ_Q_F_REFRESH        0x2
 289 struct mesh_preq_queue {
 290         struct list_head list;
 291         u8 dst[ETH_ALEN];
 292         u8 flags;
 293 };
 294
 295 #if HZ/100 == 0
 296 #define IEEE80211_ROC_MIN_LEFT  1
 297 #else
 298 #define IEEE80211_ROC_MIN_LEFT  (HZ/100)
 299 #endif
 300
 301 struct ieee80211_roc_work {
 302         struct list_head list;
 303         struct list_head dependents;
 304
 305         struct delayed_work work;
 306
 307         struct ieee80211_sub_if_data *sdata;
 308
 309         struct ieee80211_channel *chan;
 310
 311         bool started, abort, hw_begun, notified;
 312
 313         unsigned long hw_start_time;
 314
 315         u32 duration, req_duration;
 316         struct sk_buff *frame;
 317         u64 cookie, mgmt_tx_cookie;
 318         enum ieee80211_roc_type type;
 319 };
 320
 321 /* flags used in struct ieee80211_if_managed.flags */
 322 enum ieee80211_sta_flags {
 323         IEEE80211_STA_BEACON_POLL       = BIT(0),
 324         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 325         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 326         IEEE80211_STA_DISABLE_HT        = BIT(4),
 327         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 328         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 329         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 330         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 331         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 332         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 333         IEEE80211_STA_DISABLE_VHT       = BIT(11),
 334         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
 335         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
 336 };
 337
 338 struct ieee80211_mgd_auth_data {
 339         struct cfg80211_bss *bss;
 340         unsigned long timeout;
 341         int tries;
 342         u16 algorithm, expected_transaction;
 343
 344         u8 key[WLAN_KEY_LEN_WEP104];
 345         u8 key_len, key_idx;
 346         bool done;
 347         bool timeout_started;
 348
 349         u16 sae_trans, sae_status;
 350         size_t data_len;
 351         u8 data[];
 352 };
 353
 354 struct ieee80211_mgd_assoc_data {
 355         struct cfg80211_bss *bss;
 356         const u8 *supp_rates;
 357
 358         unsigned long timeout;
 359         int tries;
 360
 361         u16 capability;
 362         u8 prev_bssid[ETH_ALEN];
 363         u8 ssid[IEEE80211_MAX_SSID_LEN];
 364         u8 ssid_len;
 365         u8 supp_rates_len;
 366         bool wmm, uapsd;
 367         bool have_beacon, need_beacon;
 368         bool synced;
 369         bool timeout_started;
 370
 371         u8 ap_ht_param;
 372
 373         struct ieee80211_vht_cap ap_vht_cap;
 374
 375         size_t ie_len;
 376         u8 ie[];
 377 };
 378
 379 struct ieee80211_if_managed {
 380         struct timer_list timer;
 381         struct timer_list conn_mon_timer;
 382         struct timer_list bcn_mon_timer;
 383         struct timer_list chswitch_timer;
 384         struct work_struct monitor_work;
 385         struct work_struct chswitch_work;
 386         struct work_struct beacon_connection_loss_work;
 387         struct work_struct csa_connection_drop_work;
 388
 389         unsigned long beacon_timeout;
 390         unsigned long probe_timeout;
 391         int probe_send_count;
 392         bool nullfunc_failed;
 393         bool connection_loss;
 394
 395         struct mutex mtx;
 396         struct cfg80211_bss *associated;
 397         struct ieee80211_mgd_auth_data *auth_data;
 398         struct ieee80211_mgd_assoc_data *assoc_data;
 399
 400         u8 bssid[ETH_ALEN];
 401
 402         u16 aid;
 403
 404         bool powersave; /* powersave requested for this iface */
 405         bool broken_ap; /* AP is broken -- turn off powersave */
 406         u8 dtim_period;
 407         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 408                                  driver_smps_mode; /* smps mode request */
 409
 410         struct work_struct request_smps_work;
 411
 412         unsigned int flags;
 413
 414         bool beacon_crc_valid;
 415         u32 beacon_crc;
 416
 417         bool status_acked;
 418         bool status_received;
 419         __le16 status_fc;
 420
 421         enum {
 422                 IEEE80211_MFP_DISABLED,
 423                 IEEE80211_MFP_OPTIONAL,
 424                 IEEE80211_MFP_REQUIRED
 425         } mfp; /* management frame protection */
 426
 427         /*
 428          * Bitmask of enabled u-apsd queues,
 429          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 430          * to take effect.
 431          */
 432         unsigned int uapsd_queues;
 433
 434         /*
 435          * Maximum number of buffered frames AP can deliver during a
 436          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 437          * Needs a new association to take effect.
 438          */
 439         unsigned int uapsd_max_sp_len;
 440
 441         int wmm_last_param_set;
 442
 443         u8 use_4addr;
 444
 445         s16 p2p_noa_index;
 446
 447         /* Signal strength from the last Beacon frame in the current BSS. */
 448         int last_beacon_signal;
 449
 450         /*
 451          * Weighted average of the signal strength from Beacon frames in the
 452          * current BSS. This is in units of 1/16 of the signal unit to maintain
 453          * accuracy and to speed up calculations, i.e., the value need to be
 454          * divided by 16 to get the actual value.
 455          */
 456         int ave_beacon_signal;
 457
 458         /*
 459          * Number of Beacon frames used in ave_beacon_signal. This can be used
 460          * to avoid generating less reliable cqm events that would be based
 461          * only on couple of received frames.
 462          */
 463         unsigned int count_beacon_signal;
 464
 465         /*
 466          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 467          * that triggered a cqm event. 0 indicates that no event has been
 468          * generated for the current association.
 469          */
 470         int last_cqm_event_signal;
 471
 472         /*
 473          * State variables for keeping track of RSSI of the AP currently
 474          * connected to and informing driver when RSSI has gone
 475          * below/above a certain threshold.
 476          */
 477         int rssi_min_thold, rssi_max_thold;
 478         int last_ave_beacon_signal;
 479
 480         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 481         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 482         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 483         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
 484 };
 485
 486 struct ieee80211_if_ibss {
 487         struct timer_list timer;
 488
 489         struct mutex mtx;
 490
 491         unsigned long last_scan_completed;
 492
 493         u32 basic_rates;
 494
 495         bool fixed_bssid;
 496         bool fixed_channel;
 497         bool privacy;
 498
 499         bool control_port;
 500         unsigned int auth_frame_registrations;
 501
 502         u8 bssid[ETH_ALEN] __aligned(2);
 503         u8 ssid[IEEE80211_MAX_SSID_LEN];
 504         u8 ssid_len, ie_len;
 505         u8 *ie;
 506         struct ieee80211_channel *channel;
 507         enum nl80211_channel_type channel_type;
 508
 509         unsigned long ibss_join_req;
 510         /* probe response/beacon for IBSS */
 511         struct beacon_data __rcu *presp;
 512
 513         spinlock_t incomplete_lock;
 514         struct list_head incomplete_stations;
 515
 516         enum {
 517                 IEEE80211_IBSS_MLME_SEARCH,
 518                 IEEE80211_IBSS_MLME_JOINED,
 519         } state;
 520 };
 521
 522 /**
 523  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 524  *
 525  * these declarations define the interface, which enables
 526  * vendor-specific mesh synchronization
 527  *
 528  */
 529 struct ieee802_11_elems;
 530 struct ieee80211_mesh_sync_ops {
 531         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 532                              u16 stype,
 533                              struct ieee80211_mgmt *mgmt,
 534                              struct ieee802_11_elems *elems,
 535                              struct ieee80211_rx_status *rx_status);
 536         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata);
 537         /* add other framework functions here */
 538 };
 539
 540 struct ieee80211_if_mesh {
 541         struct timer_list housekeeping_timer;
 542         struct timer_list mesh_path_timer;
 543         struct timer_list mesh_path_root_timer;
 544
 545         unsigned long wrkq_flags;
 546
 547         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 548         size_t mesh_id_len;
 549         /* Active Path Selection Protocol Identifier */
 550         u8 mesh_pp_id;
 551         /* Active Path Selection Metric Identifier */
 552         u8 mesh_pm_id;
 553         /* Congestion Control Mode Identifier */
 554         u8 mesh_cc_id;
 555         /* Synchronization Protocol Identifier */
 556         u8 mesh_sp_id;
 557         /* Authentication Protocol Identifier */
 558         u8 mesh_auth_id;
 559         /* Local mesh Sequence Number */
 560         u32 sn;
 561         /* Last used PREQ ID */
 562         u32 preq_id;
 563         atomic_t mpaths;
 564         /* Timestamp of last SN update */
 565         unsigned long last_sn_update;
 566         /* Time when it's ok to send next PERR */
 567         unsigned long next_perr;
 568         /* Timestamp of last PREQ sent */
 569         unsigned long last_preq;
 570         struct mesh_rmc *rmc;
 571         spinlock_t mesh_preq_queue_lock;
 572         struct mesh_preq_queue preq_queue;
 573         int preq_queue_len;
 574         struct mesh_stats mshstats;
 575         struct mesh_config mshcfg;
 576         atomic_t estab_plinks;
 577         u32 mesh_seqnum;
 578         bool accepting_plinks;
 579         int num_gates;
 580         struct beacon_data __rcu *beacon;
 581         /* just protects beacon updates for now */
 582         struct mutex mtx;
 583         const u8 *ie;
 584         u8 ie_len;
 585         enum {
 586                 IEEE80211_MESH_SEC_NONE = 0x0,
 587                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 588                 IEEE80211_MESH_SEC_SECURED = 0x2,
 589         } security;
 590         bool user_mpm;
 591         /* Extensible Synchronization Framework */
 592         const struct ieee80211_mesh_sync_ops *sync_ops;
 593         s64 sync_offset_clockdrift_max;
 594         spinlock_t sync_offset_lock;
 595         bool adjusting_tbtt;
 596         /* mesh power save */
 597         enum nl80211_mesh_power_mode nonpeer_pm;
 598         int ps_peers_light_sleep;
 599         int ps_peers_deep_sleep;
 600         struct ps_data ps;
 601 };
 602
 603 #ifdef CONFIG_MAC80211_MESH
 604 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 605         do { (msh)->mshstats.name++; } while (0)
 606 #else
 607 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 608         do { } while (0)
 609 #endif
 610
 611 /**
 612  * enum ieee80211_sub_if_data_flags - virtual interface flags
 613  *
 614  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 615  * @IEEE80211_SDATA_PROMISC: interface is promisc
 616  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 617  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 618  *      associated stations and deliver multicast frames both
 619  *      back to wireless media and to the local net stack.
 620  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 621  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 622  */
 623 enum ieee80211_sub_if_data_flags {
 624         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 625         IEEE80211_SDATA_PROMISC                 = BIT(1),
 626         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 627         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 628         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 629         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 630 };
 631
 632 /**
 633  * enum ieee80211_sdata_state_bits - virtual interface state bits
 634  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 635  *      mirrors netif_running() but is separate for interface type
 636  *      change handling while the interface is up
 637  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 638  *      mode, so queues are stopped
 639  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
 640  *      to offchannel, reset when offchannel returns
 641  */
 642 enum ieee80211_sdata_state_bits {
 643         SDATA_STATE_RUNNING,
 644         SDATA_STATE_OFFCHANNEL,
 645         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 646 };
 647
 648 /**
 649  * enum ieee80211_chanctx_mode - channel context configuration mode
 650  *
 651  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
 652  *      multiple interfaces
 653  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
 654  *      only by a single interface. This can be used for example for
 655  *      non-fixed channel IBSS.
 656  */
 657 enum ieee80211_chanctx_mode {
 658         IEEE80211_CHANCTX_SHARED,
 659         IEEE80211_CHANCTX_EXCLUSIVE
 660 };
 661
 662 struct ieee80211_chanctx {
 663         struct list_head list;
 664         struct rcu_head rcu_head;
 665
 666         enum ieee80211_chanctx_mode mode;
 667         int refcount;
 668         bool driver_present;
 669
 670         struct ieee80211_chanctx_conf conf;
 671 };
 672
 673 struct ieee80211_sub_if_data {
 674         struct list_head list;
 675
 676         struct wireless_dev wdev;
 677
 678         /* keys */
 679         struct list_head key_list;
 680
 681         /* count for keys needing tailroom space allocation */
 682         int crypto_tx_tailroom_needed_cnt;
 683         int crypto_tx_tailroom_pending_dec;
 684         struct delayed_work dec_tailroom_needed_wk;
 685
 686         struct net_device *dev;
 687         struct ieee80211_local *local;
 688
 689         unsigned int flags;
 690
 691         unsigned long state;
 692
 693         int drop_unencrypted;
 694
 695         char name[IFNAMSIZ];
 696
 697         /* Fragment table for host-based reassembly */
 698         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 699         unsigned int fragment_next;
 700
 701         /* TID bitmap for NoAck policy */
 702         u16 noack_map;
 703
 704         /* bit field of ACM bits (BIT(802.1D tag)) */
 705         u8 wmm_acm;
 706
 707         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 708         struct ieee80211_key __rcu *default_unicast_key;
 709         struct ieee80211_key __rcu *default_multicast_key;
 710         struct ieee80211_key __rcu *default_mgmt_key;
 711
 712         u16 sequence_number;
 713         __be16 control_port_protocol;
 714         bool control_port_no_encrypt;
 715
 716         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 717
 718         /* used to reconfigure hardware SM PS */
 719         struct work_struct recalc_smps;
 720
 721         struct work_struct work;
 722         struct sk_buff_head skb_queue;
 723
 724         u8 needed_rx_chains;
 725         enum ieee80211_smps_mode smps_mode;
 726
 727         int user_power_level; /* in dBm */
 728         int ap_power_level; /* in dBm */
 729
 730         bool radar_required;
 731         struct delayed_work dfs_cac_timer_work;
 732
 733         /*
 734          * AP this belongs to: self in AP mode and
 735          * corresponding AP in VLAN mode, NULL for
 736          * all others (might be needed later in IBSS)
 737          */
 738         struct ieee80211_if_ap *bss;
 739
 740         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 741         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 742
 743         bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
 744         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 745
 746         union {
 747                 struct ieee80211_if_ap ap;
 748                 struct ieee80211_if_wds wds;
 749                 struct ieee80211_if_vlan vlan;
 750                 struct ieee80211_if_managed mgd;
 751                 struct ieee80211_if_ibss ibss;
 752                 struct ieee80211_if_mesh mesh;
 753                 u32 mntr_flags;
 754         } u;
 755
 756         spinlock_t cleanup_stations_lock;
 757         struct list_head cleanup_stations;
 758         struct work_struct cleanup_stations_wk;
 759
 760 #ifdef CONFIG_MAC80211_DEBUGFS
 761         struct {
 762                 struct dentry *subdir_stations;
 763                 struct dentry *default_unicast_key;
 764                 struct dentry *default_multicast_key;
 765                 struct dentry *default_mgmt_key;
 766         } debugfs;
 767 #endif
 768
 769         /* must be last, dynamically sized area in this! */
 770         struct ieee80211_vif vif;
 771 };
 772
 773 static inline
 774 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 775 {
 776         return container_of(p, struct ieee80211_sub_if_data, vif);
 777 }
 778
 779 static inline enum ieee80211_band
 780 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
 781 {
 782         enum ieee80211_band band = IEEE80211_BAND_2GHZ;
 783         struct ieee80211_chanctx_conf *chanctx_conf;
 784
 785         rcu_read_lock();
 786         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 787         if (!WARN_ON(!chanctx_conf))
 788                 band = chanctx_conf->def.chan->band;
 789         rcu_read_unlock();
 790
 791         return band;
 792 }
 793
 794 enum sdata_queue_type {
 795         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 796         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 797         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 798 };
 799
 800 enum {
 801         IEEE80211_RX_MSG        = 1,
 802         IEEE80211_TX_STATUS_MSG = 2,
 803 };
 804
 805 enum queue_stop_reason {
 806         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 807         IEEE80211_QUEUE_STOP_REASON_PS,
 808         IEEE80211_QUEUE_STOP_REASON_CSA,
 809         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 810         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 811         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 812         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
 813         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 814 };
 815
 816 #ifdef CONFIG_MAC80211_LEDS
 817 struct tpt_led_trigger {
 818         struct led_trigger trig;
 819         char name[32];
 820         const struct ieee80211_tpt_blink *blink_table;
 821         unsigned int blink_table_len;
 822         struct timer_list timer;
 823         unsigned long prev_traffic;
 824         unsigned long tx_bytes, rx_bytes;
 825         unsigned int active, want;
 826         bool running;
 827 };
 828 #endif
 829
 830 /**
 831  * mac80211 scan flags - currently active scan mode
 832  *
 833  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 834  *      well be on the operating channel
 835  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 836  *      determine if we are on the operating channel or not
 837  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
 838  *      channel. This should not interrupt normal traffic.
 839  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 840  *      that the scan completed.
 841  * @SCAN_ABORTED: Set for our scan work function when the driver reported
 842  *      a scan complete for an aborted scan.
 843  */
 844 enum {
 845         SCAN_SW_SCANNING,
 846         SCAN_HW_SCANNING,
 847         SCAN_ONCHANNEL_SCANNING,
 848         SCAN_COMPLETED,
 849         SCAN_ABORTED,
 850 };
 851
 852 /**
 853  * enum mac80211_scan_state - scan state machine states
 854  *
 855  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 856  *      determines if we should keep on scanning or switch back to the
 857  *      operating channel
 858  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 859  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 860  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
 861  *      send out data
 862  * @SCAN_RESUME: Resume the scan and scan the next channel
 863  * @SCAN_ABORT: Abort the scan and go back to operating channel
 864  */
 865 enum mac80211_scan_state {
 866         SCAN_DECISION,
 867         SCAN_SET_CHANNEL,
 868         SCAN_SEND_PROBE,
 869         SCAN_SUSPEND,
 870         SCAN_RESUME,
 871         SCAN_ABORT,
 872 };
 873
 874 struct ieee80211_local {
 875         /* embed the driver visible part.
 876          * don't cast (use the static inlines below), but we keep
 877          * it first anyway so they become a no-op */
 878         struct ieee80211_hw hw;
 879
 880         const struct ieee80211_ops *ops;
 881
 882         /*
 883          * private workqueue to mac80211. mac80211 makes this accessible
 884          * via ieee80211_queue_work()
 885          */
 886         struct workqueue_struct *workqueue;
 887
 888         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 889         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 890         spinlock_t queue_stop_reason_lock;
 891
 892         int open_count;
 893         int monitors, cooked_mntrs;
 894         /* number of interfaces with corresponding FIF_ flags */
 895         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 896             fif_probe_req;
 897         int probe_req_reg;
 898         unsigned int filter_flags; /* FIF_* */
 899
 900         bool wiphy_ciphers_allocated;
 901
 902         bool use_chanctx;
 903
 904         /* protects the aggregated multicast list and filter calls */
 905         spinlock_t filter_lock;
 906
 907         /* used for uploading changed mc list */
 908         struct work_struct reconfig_filter;
 909
 910         /* aggregated multicast list */
 911         struct netdev_hw_addr_list mc_list;
 912
 913         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 914
 915         /*
 916          * suspended is true if we finished all the suspend _and_ we have
 917          * not yet come up from resume. This is to be used by mac80211
 918          * to ensure driver sanity during suspend and mac80211's own
 919          * sanity. It can eventually be used for WoW as well.
 920          */
 921         bool suspended;
 922
 923         /*
 924          * Resuming is true while suspended, but when we're reprogramming the
 925          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 926          * again even though some other parts of the stack are still suspended
 927          * and we still drop received frames to avoid waking the stack.
 928          */
 929         bool resuming;
 930
 931         /*
 932          * quiescing is true during the suspend process _only_ to
 933          * ease timer cancelling etc.
 934          */
 935         bool quiescing;
 936
 937         /* device is started */
 938         bool started;
 939
 940         /* device is during a HW reconfig */
 941         bool in_reconfig;
 942
 943         /* wowlan is enabled -- don't reconfig on resume */
 944         bool wowlan;
 945
 946         /* DFS/radar detection is enabled */
 947         bool radar_detect_enabled;
 948         struct work_struct radar_detected_work;
 949
 950         /* number of RX chains the hardware has */
 951         u8 rx_chains;
 952
 953         int tx_headroom; /* required headroom for hardware/radiotap */
 954
 955         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 956          * added to skb_queue will be processed, but frames in
 957          * skb_queue_unreliable may be dropped if the total length of these
 958          * queues increases over the limit. */
 959 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 960         struct tasklet_struct tasklet;
 961         struct sk_buff_head skb_queue;
 962         struct sk_buff_head skb_queue_unreliable;
 963
 964         spinlock_t rx_path_lock;
 965
 966         /* Station data */
 967         /*
 968          * The mutex only protects the list, hash table and
 969          * counter, reads are done with RCU.
 970          */
 971         struct mutex sta_mtx;
 972         spinlock_t tim_lock;
 973         unsigned long num_sta;
 974         struct list_head sta_list;
 975         struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
 976         struct timer_list sta_cleanup;
 977         int sta_generation;
 978
 979         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 980         struct tasklet_struct tx_pending_tasklet;
 981
 982         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 983
 984         /* number of interfaces with corresponding IFF_ flags */
 985         atomic_t iff_allmultis, iff_promiscs;
 986
 987         struct rate_control_ref *rate_ctrl;
 988
 989         struct crypto_cipher *wep_tx_tfm;
 990         struct crypto_cipher *wep_rx_tfm;
 991         u32 wep_iv;
 992
 993         /* see iface.c */
 994         struct list_head interfaces;
 995         struct mutex iflist_mtx;
 996
 997         /*
 998          * Key mutex, protects sdata's key_list and sta_info's
 999          * key pointers (write access, they're RCU.)
1000          */
1001         struct mutex key_mtx;
1002
1003         /* mutex for scan and work locking */
1004         struct mutex mtx;
1005
1006         /* Scanning and BSS list */
1007         unsigned long scanning;
1008         struct cfg80211_ssid scan_ssid;
1009         struct cfg80211_scan_request *int_scan_req;
1010         struct cfg80211_scan_request *scan_req, *hw_scan_req;
1011         struct ieee80211_channel *scan_channel;
1012         enum ieee80211_band hw_scan_band;
1013         int scan_channel_idx;
1014         int scan_ies_len;
1015         int hw_scan_ies_bufsize;
1016
1017         struct work_struct sched_scan_stopped_work;
1018         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1019
1020         unsigned long leave_oper_channel_time;
1021         enum mac80211_scan_state next_scan_state;
1022         struct delayed_work scan_work;
1023         struct ieee80211_sub_if_data __rcu *scan_sdata;
1024         struct cfg80211_chan_def csa_chandef;
1025         /* For backward compatibility only -- do not use */
1026         struct cfg80211_chan_def _oper_chandef;
1027
1028         /* Temporary remain-on-channel for off-channel operations */
1029         struct ieee80211_channel *tmp_channel;
1030
1031         /* channel contexts */
1032         struct list_head chanctx_list;
1033         struct mutex chanctx_mtx;
1034
1035         /* SNMP counters */
1036         /* dot11CountersTable */
1037         u32 dot11TransmittedFragmentCount;
1038         u32 dot11MulticastTransmittedFrameCount;
1039         u32 dot11FailedCount;
1040         u32 dot11RetryCount;
1041         u32 dot11MultipleRetryCount;
1042         u32 dot11FrameDuplicateCount;
1043         u32 dot11ReceivedFragmentCount;
1044         u32 dot11MulticastReceivedFrameCount;
1045         u32 dot11TransmittedFrameCount;
1046
1047 #ifdef CONFIG_MAC80211_LEDS
1048         int tx_led_counter, rx_led_counter;
1049         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
1050         struct tpt_led_trigger *tpt_led_trigger;
1051         char tx_led_name[32], rx_led_name[32],
1052              assoc_led_name[32], radio_led_name[32];
1053 #endif
1054
1055 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1056         /* TX/RX handler statistics */
1057         unsigned int tx_handlers_drop;
1058         unsigned int tx_handlers_queued;
1059         unsigned int tx_handlers_drop_unencrypted;
1060         unsigned int tx_handlers_drop_fragment;
1061         unsigned int tx_handlers_drop_wep;
1062         unsigned int tx_handlers_drop_not_assoc;
1063         unsigned int tx_handlers_drop_unauth_port;
1064         unsigned int rx_handlers_drop;
1065         unsigned int rx_handlers_queued;
1066         unsigned int rx_handlers_drop_nullfunc;
1067         unsigned int rx_handlers_drop_defrag;
1068         unsigned int rx_handlers_drop_short;
1069         unsigned int tx_expand_skb_head;
1070         unsigned int tx_expand_skb_head_cloned;
1071         unsigned int rx_expand_skb_head;
1072         unsigned int rx_expand_skb_head2;
1073         unsigned int rx_handlers_fragments;
1074         unsigned int tx_status_drop;
1075 #define I802_DEBUG_INC(c) (c)++
1076 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1077 #define I802_DEBUG_INC(c) do { } while (0)
1078 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1079
1080
1081         int total_ps_buffered; /* total number of all buffered unicast and
1082                                 * multicast packets for power saving stations
1083                                 */
1084
1085         bool pspolling;
1086         bool offchannel_ps_enabled;
1087         /*
1088          * PS can only be enabled when we have exactly one managed
1089          * interface (and monitors) in PS, this then points there.
1090          */
1091         struct ieee80211_sub_if_data *ps_sdata;
1092         struct work_struct dynamic_ps_enable_work;
1093         struct work_struct dynamic_ps_disable_work;
1094         struct timer_list dynamic_ps_timer;
1095         struct notifier_block network_latency_notifier;
1096         struct notifier_block ifa_notifier;
1097         struct notifier_block ifa6_notifier;
1098
1099         /*
1100          * The dynamic ps timeout configured from user space via WEXT -
1101          * this will override whatever chosen by mac80211 internally.
1102          */
1103         int dynamic_ps_forced_timeout;
1104
1105         int user_power_level; /* in dBm, for all interfaces */
1106
1107         enum ieee80211_smps_mode smps_mode;
1108
1109         struct work_struct restart_work;
1110
1111 #ifdef CONFIG_MAC80211_DEBUGFS
1112         struct local_debugfsdentries {
1113                 struct dentry *rcdir;
1114                 struct dentry *keys;
1115         } debugfs;
1116 #endif
1117
1118         /*
1119          * Remain-on-channel support
1120          */
1121         struct list_head roc_list;
1122         struct work_struct hw_roc_start, hw_roc_done;
1123         unsigned long hw_roc_start_time;
1124         u64 roc_cookie_counter;
1125
1126         struct idr ack_status_frames;
1127         spinlock_t ack_status_lock;
1128
1129         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1130
1131         /* virtual monitor interface */
1132         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1133         struct cfg80211_chan_def monitor_chandef;
1134 };
1135
1136 static inline struct ieee80211_sub_if_data *
1137 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1138 {
1139         return netdev_priv(dev);
1140 }
1141
1142 static inline struct ieee80211_sub_if_data *
1143 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1144 {
1145         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1146 }
1147
1148 /* this struct represents 802.11n's RA/TID combination */
1149 struct ieee80211_ra_tid {
1150         u8 ra[ETH_ALEN];
1151         u16 tid;
1152 };
1153
1154 /* Parsed Information Elements */
1155 struct ieee802_11_elems {
1156         const u8 *ie_start;
1157         size_t total_len;
1158
1159         /* pointers to IEs */
1160         const u8 *ssid;
1161         const u8 *supp_rates;
1162         const u8 *ds_params;
1163         const struct ieee80211_tim_ie *tim;
1164         const u8 *challenge;
1165         const u8 *rsn;
1166         const u8 *erp_info;
1167         const u8 *ext_supp_rates;
1168         const u8 *wmm_info;
1169         const u8 *wmm_param;
1170         const struct ieee80211_ht_cap *ht_cap_elem;
1171         const struct ieee80211_ht_operation *ht_operation;
1172         const struct ieee80211_vht_cap *vht_cap_elem;
1173         const struct ieee80211_vht_operation *vht_operation;
1174         const struct ieee80211_meshconf_ie *mesh_config;
1175         const u8 *mesh_id;
1176         const u8 *peering;
1177         const __le16 *awake_window;
1178         const u8 *preq;
1179         const u8 *prep;
1180         const u8 *perr;
1181         const struct ieee80211_rann_ie *rann;
1182         const struct ieee80211_channel_sw_ie *ch_switch_ie;
1183         const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1184         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1185         const u8 *country_elem;
1186         const u8 *pwr_constr_elem;
1187         const struct ieee80211_timeout_interval_ie *timeout_int;
1188         const u8 *opmode_notif;
1189         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1190
1191         /* length of them, respectively */
1192         u8 ssid_len;
1193         u8 supp_rates_len;
1194         u8 tim_len;
1195         u8 challenge_len;
1196         u8 rsn_len;
1197         u8 ext_supp_rates_len;
1198         u8 wmm_info_len;
1199         u8 wmm_param_len;
1200         u8 mesh_id_len;
1201         u8 peering_len;
1202         u8 preq_len;
1203         u8 prep_len;
1204         u8 perr_len;
1205         u8 country_elem_len;
1206
1207         /* whether a parse error occurred while retrieving these elements */
1208         bool parse_error;
1209 };
1210
1211 static inline struct ieee80211_local *hw_to_local(
1212         struct ieee80211_hw *hw)
1213 {
1214         return container_of(hw, struct ieee80211_local, hw);
1215 }
1216
1217
1218 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1219 {
1220         return ether_addr_equal(raddr, addr) ||
1221                is_broadcast_ether_addr(raddr);
1222 }
1223
1224 static inline bool
1225 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1226 {
1227         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1228                      status->flag & RX_FLAG_MACTIME_END);
1229         return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1230 }
1231
1232 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1233                                      struct ieee80211_rx_status *status,
1234                                      unsigned int mpdu_len,
1235                                      unsigned int mpdu_offset);
1236 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1237 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1238 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1239                                       u32 changed);
1240 void ieee80211_configure_filter(struct ieee80211_local *local);
1241 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1242
1243 /* STA code */
1244 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1245 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1246                        struct cfg80211_auth_request *req);
1247 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1248                         struct cfg80211_assoc_request *req);
1249 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1250                          struct cfg80211_deauth_request *req);
1251 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1252                            struct cfg80211_disassoc_request *req);
1253 void ieee80211_send_pspoll(struct ieee80211_local *local,
1254                            struct ieee80211_sub_if_data *sdata);
1255 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1256 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1257 int ieee80211_max_network_latency(struct notifier_block *nb,
1258                                   unsigned long data, void *dummy);
1259 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1260 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1261 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1262                                   struct sk_buff *skb);
1263 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1264 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1265 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1266 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1267                                   __le16 fc, bool acked);
1268
1269 /* IBSS code */
1270 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1271 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1272 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1273                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1274 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1275                         struct cfg80211_ibss_params *params);
1276 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1277 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1278 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1279                                    struct sk_buff *skb);
1280
1281 /* mesh code */
1282 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1283 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1284                                    struct sk_buff *skb);
1285
1286 /* scan/BSS handling */
1287 void ieee80211_scan_work(struct work_struct *work);
1288 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1289                                 const u8 *ssid, u8 ssid_len,
1290                                 struct ieee80211_channel *chan);
1291 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1292                            struct cfg80211_scan_request *req);
1293 void ieee80211_scan_cancel(struct ieee80211_local *local);
1294 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1295 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1296
1297 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1298 struct ieee80211_bss *
1299 ieee80211_bss_info_update(struct ieee80211_local *local,
1300                           struct ieee80211_rx_status *rx_status,
1301                           struct ieee80211_mgmt *mgmt,
1302                           size_t len,
1303                           struct ieee802_11_elems *elems,
1304                           struct ieee80211_channel *channel);
1305 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1306                           struct ieee80211_bss *bss);
1307
1308 /* scheduled scan handling */
1309 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1310                                        struct cfg80211_sched_scan_request *req);
1311 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1312 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1313
1314 /* off-channel helpers */
1315 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1316 void ieee80211_offchannel_return(struct ieee80211_local *local);
1317 void ieee80211_roc_setup(struct ieee80211_local *local);
1318 void ieee80211_start_next_roc(struct ieee80211_local *local);
1319 void ieee80211_roc_purge(struct ieee80211_local *local,
1320                          struct ieee80211_sub_if_data *sdata);
1321 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc);
1322 void ieee80211_sw_roc_work(struct work_struct *work);
1323 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1324
1325 /* interface handling */
1326 int ieee80211_iface_init(void);
1327 void ieee80211_iface_exit(void);
1328 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1329                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1330                      struct vif_params *params);
1331 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1332                              enum nl80211_iftype type);
1333 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1334 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1335 void ieee80211_recalc_idle(struct ieee80211_local *local);
1336 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1337                                     const int offset);
1338 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1339 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1340 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1341 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1342
1343 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1344 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1345
1346 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1347 {
1348         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1349 }
1350
1351 /* tx handling */
1352 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1353 void ieee80211_tx_pending(unsigned long data);
1354 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1355                                          struct net_device *dev);
1356 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1357                                        struct net_device *dev);
1358 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1359                               struct sk_buff_head *skbs);
1360
1361 /* HT */
1362 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1363                                      struct ieee80211_sta_ht_cap *ht_cap);
1364 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1365                                        struct ieee80211_supported_band *sband,
1366                                        const struct ieee80211_ht_cap *ht_cap_ie,
1367                                        struct sta_info *sta);
1368 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1369                           const u8 *da, u16 tid,
1370                           u16 initiator, u16 reason_code);
1371 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1372                                enum ieee80211_smps_mode smps, const u8 *da,
1373                                const u8 *bssid);
1374 void ieee80211_request_smps_work(struct work_struct *work);
1375
1376 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1377                                      u16 initiator, u16 reason, bool stop);
1378 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1379                                     u16 initiator, u16 reason, bool stop);
1380 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1381                                          enum ieee80211_agg_stop_reason reason);
1382 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1383                              struct sta_info *sta,
1384                              struct ieee80211_mgmt *mgmt, size_t len);
1385 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1386                                   struct sta_info *sta,
1387                                   struct ieee80211_mgmt *mgmt,
1388                                   size_t len);
1389 void ieee80211_process_addba_request(struct ieee80211_local *local,
1390                                      struct sta_info *sta,
1391                                      struct ieee80211_mgmt *mgmt,
1392                                      size_t len);
1393
1394 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1395                                    enum ieee80211_agg_stop_reason reason);
1396 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1397                                     enum ieee80211_agg_stop_reason reason);
1398 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1399 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1400 void ieee80211_ba_session_work(struct work_struct *work);
1401 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1402 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1403
1404 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1405
1406 /* VHT */
1407 void
1408 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1409                                     struct ieee80211_supported_band *sband,
1410                                     const struct ieee80211_vht_cap *vht_cap_ie,
1411                                     struct sta_info *sta);
1412 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1413 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1414 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1415                                  struct sta_info *sta, u8 opmode,
1416                                  enum ieee80211_band band, bool nss_only);
1417 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1418                                       struct ieee80211_sta_vht_cap *vht_cap);
1419
1420 /* Spectrum management */
1421 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1422                                        struct ieee80211_mgmt *mgmt,
1423                                        size_t len);
1424
1425 /* Suspend/resume and hw reconfiguration */
1426 int ieee80211_reconfig(struct ieee80211_local *local);
1427 void ieee80211_stop_device(struct ieee80211_local *local);
1428
1429 int __ieee80211_suspend(struct ieee80211_hw *hw,
1430                         struct cfg80211_wowlan *wowlan);
1431
1432 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1433 {
1434         struct ieee80211_local *local = hw_to_local(hw);
1435
1436         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1437                 "%s: resume with hardware scan still in progress\n",
1438                 wiphy_name(hw->wiphy));
1439
1440         return ieee80211_reconfig(hw_to_local(hw));
1441 }
1442
1443 /* utility functions/constants */
1444 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1445 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1446                         enum nl80211_iftype type);
1447 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1448                              int rate, int erp, int short_preamble);
1449 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1450                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1451                                      gfp_t gfp);
1452 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1453                                bool bss_notify);
1454 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1455                     enum ieee80211_band band);
1456
1457 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1458                                  struct sk_buff *skb, int tid,
1459                                  enum ieee80211_band band);
1460
1461 static inline void
1462 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1463                           struct sk_buff *skb, int tid,
1464                           enum ieee80211_band band)
1465 {
1466         rcu_read_lock();
1467         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1468         rcu_read_unlock();
1469 }
1470
1471 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1472                                         struct sk_buff *skb, int tid)
1473 {
1474         struct ieee80211_chanctx_conf *chanctx_conf;
1475
1476         rcu_read_lock();
1477         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1478         if (WARN_ON(!chanctx_conf)) {
1479                 rcu_read_unlock();
1480                 kfree_skb(skb);
1481                 return;
1482         }
1483
1484         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1485                                     chanctx_conf->def.chan->band);
1486         rcu_read_unlock();
1487 }
1488
1489 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1490                                     struct sk_buff *skb)
1491 {
1492         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1493         ieee80211_tx_skb_tid(sdata, skb, 7);
1494 }
1495
1496 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, bool action,
1497                                struct ieee802_11_elems *elems,
1498                                u64 filter, u32 crc);
1499 static inline void ieee802_11_parse_elems(u8 *start, size_t len, bool action,
1500                                           struct ieee802_11_elems *elems)
1501 {
1502         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1503 }
1504
1505 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1506                               enum ieee80211_band band);
1507
1508 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1509 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1510 void ieee80211_dynamic_ps_timer(unsigned long data);
1511 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1512                              struct ieee80211_sub_if_data *sdata,
1513                              int powersave);
1514 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1515                              struct ieee80211_hdr *hdr);
1516 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1517                              struct ieee80211_hdr *hdr, bool ack);
1518
1519 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1520                                      unsigned long queues,
1521                                      enum queue_stop_reason reason);
1522 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1523                                      unsigned long queues,
1524                                      enum queue_stop_reason reason);
1525 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1526                                     enum queue_stop_reason reason);
1527 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1528                                     enum queue_stop_reason reason);
1529 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1530 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1531                                struct sk_buff *skb);
1532 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1533                                    struct sk_buff_head *skbs,
1534                                    void (*fn)(void *data), void *data);
1535 static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1536                                               struct sk_buff_head *skbs)
1537 {
1538         ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
1539 }
1540 void ieee80211_flush_queues(struct ieee80211_local *local,
1541                             struct ieee80211_sub_if_data *sdata);
1542
1543 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1544                          u16 transaction, u16 auth_alg, u16 status,
1545                          const u8 *extra, size_t extra_len, const u8 *bssid,
1546                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1547                          u32 tx_flags);
1548 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1549                                     const u8 *bssid, u16 stype, u16 reason,
1550                                     bool send_frame, u8 *frame_buf);
1551 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1552                              size_t buffer_len, const u8 *ie, size_t ie_len,
1553                              enum ieee80211_band band, u32 rate_mask,
1554                              u8 channel);
1555 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1556                                           u8 *dst, u32 ratemask,
1557                                           struct ieee80211_channel *chan,
1558                                           const u8 *ssid, size_t ssid_len,
1559                                           const u8 *ie, size_t ie_len,
1560                                           bool directed);
1561 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1562                               const u8 *ssid, size_t ssid_len,
1563                               const u8 *ie, size_t ie_len,
1564                               u32 ratemask, bool directed, u32 tx_flags,
1565                               struct ieee80211_channel *channel, bool scan);
1566
1567 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1568                                   const size_t supp_rates_len,
1569                                   const u8 *supp_rates);
1570 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1571                             struct ieee802_11_elems *elems,
1572                             enum ieee80211_band band, u32 *basic_rates);
1573 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1574                              enum ieee80211_smps_mode smps_mode);
1575 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1576
1577 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1578                           const u8 *ids, int n_ids, size_t offset);
1579 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1580 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1581                               u16 cap);
1582 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1583                                const struct cfg80211_chan_def *chandef,
1584                                u16 prot_mode);
1585 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1586                                u32 cap);
1587 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1588                             struct sk_buff *skb, bool need_basic,
1589                             enum ieee80211_band band);
1590 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1591                                 struct sk_buff *skb, bool need_basic,
1592                                 enum ieee80211_band band);
1593
1594 /* channel management */
1595 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1596                                   const struct ieee80211_ht_operation *ht_oper,
1597                                   struct cfg80211_chan_def *chandef);
1598
1599 int __must_check
1600 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1601                           const struct cfg80211_chan_def *chandef,
1602                           enum ieee80211_chanctx_mode mode);
1603 int __must_check
1604 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
1605                                const struct cfg80211_chan_def *chandef,
1606                                u32 *changed);
1607 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
1608 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
1609 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
1610                                          bool clear);
1611
1612 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
1613                                    struct ieee80211_chanctx *chanctx);
1614 void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
1615                                     struct ieee80211_chanctx *chanctx);
1616
1617 void ieee80211_dfs_cac_timer(unsigned long data);
1618 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
1619 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
1620 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
1621
1622 #ifdef CONFIG_MAC80211_NOINLINE
1623 #define debug_noinline noinline
1624 #else
1625 #define debug_noinline
1626 #endif
1627
1628 #endif /* IEEE80211_I_H */