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         struct ieee80211_tx_rate rate;
 160
 161         unsigned int flags;
 162 };
 163
 164
 165 typedef unsigned __bitwise__ ieee80211_rx_result;
 166 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 167 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 168 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 169 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 170
 171 /**
 172  * enum ieee80211_packet_rx_flags - packet RX flags
 173  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
 174  *      (incl. multicast frames)
 175  * @IEEE80211_RX_FRAGMENTED: fragmented frame
 176  * @IEEE80211_RX_AMSDU: a-MSDU packet
 177  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 178  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 179  *
 180  * These are per-frame flags that are attached to a frame in the
 181  * @rx_flags field of &struct ieee80211_rx_status.
 182  */
 183 enum ieee80211_packet_rx_flags {
 184         IEEE80211_RX_RA_MATCH                   = BIT(1),
 185         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 186         IEEE80211_RX_AMSDU                      = BIT(3),
 187         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 188         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 189 };
 190
 191 /**
 192  * enum ieee80211_rx_flags - RX data flags
 193  *
 194  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 195  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 196  *      to cfg80211_report_obss_beacon().
 197  *
 198  * These flags are used across handling multiple interfaces
 199  * for a single frame.
 200  */
 201 enum ieee80211_rx_flags {
 202         IEEE80211_RX_CMNTR              = BIT(0),
 203         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 204 };
 205
 206 struct ieee80211_rx_data {
 207         struct sk_buff *skb;
 208         struct ieee80211_local *local;
 209         struct ieee80211_sub_if_data *sdata;
 210         struct sta_info *sta;
 211         struct ieee80211_key *key;
 212
 213         unsigned int flags;
 214
 215         /*
 216          * Index into sequence numbers array, 0..16
 217          * since the last (16) is used for non-QoS,
 218          * will be 16 on non-QoS frames.
 219          */
 220         int seqno_idx;
 221
 222         /*
 223          * Index into the security IV/PN arrays, 0..16
 224          * since the last (16) is used for CCMP-encrypted
 225          * management frames, will be set to 16 on mgmt
 226          * frames and 0 on non-QoS frames.
 227          */
 228         int security_idx;
 229
 230         u32 tkip_iv32;
 231         u16 tkip_iv16;
 232 };
 233
 234 struct beacon_data {
 235         u8 *head, *tail;
 236         int head_len, tail_len;
 237         struct rcu_head rcu_head;
 238 };
 239
 240 struct probe_resp {
 241         struct rcu_head rcu_head;
 242         int len;
 243         u8 data[0];
 244 };
 245
 246 struct ps_data {
 247         /* yes, this looks ugly, but guarantees that we can later use
 248          * bitmap_empty :)
 249          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 250         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 251         struct sk_buff_head bc_buf;
 252         atomic_t num_sta_ps; /* number of stations in PS mode */
 253         int dtim_count;
 254         bool dtim_bc_mc;
 255 };
 256
 257 struct ieee80211_if_ap {
 258         struct beacon_data __rcu *beacon;
 259         struct probe_resp __rcu *probe_resp;
 260
 261         struct list_head vlans;
 262
 263         struct ps_data ps;
 264         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 265 };
 266
 267 struct ieee80211_if_wds {
 268         struct sta_info *sta;
 269         u8 remote_addr[ETH_ALEN];
 270 };
 271
 272 struct ieee80211_if_vlan {
 273         struct list_head list;
 274
 275         /* used for all tx if the VLAN is configured to 4-addr mode */
 276         struct sta_info __rcu *sta;
 277 };
 278
 279 struct mesh_stats {
 280         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 281         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 282         __u32 fwded_frames;             /* Mesh total forwarded frames */
 283         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 284         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 285         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 286 };
 287
 288 #define PREQ_Q_F_START          0x1
 289 #define PREQ_Q_F_REFRESH        0x2
 290 struct mesh_preq_queue {
 291         struct list_head list;
 292         u8 dst[ETH_ALEN];
 293         u8 flags;
 294 };
 295
 296 #if HZ/100 == 0
 297 #define IEEE80211_ROC_MIN_LEFT  1
 298 #else
 299 #define IEEE80211_ROC_MIN_LEFT  (HZ/100)
 300 #endif
 301
 302 struct ieee80211_roc_work {
 303         struct list_head list;
 304         struct list_head dependents;
 305
 306         struct delayed_work work;
 307
 308         struct ieee80211_sub_if_data *sdata;
 309
 310         struct ieee80211_channel *chan;
 311
 312         bool started, abort, hw_begun, notified;
 313         bool to_be_freed;
 314
 315         unsigned long hw_start_time;
 316
 317         u32 duration, req_duration;
 318         struct sk_buff *frame;
 319         u64 cookie, mgmt_tx_cookie;
 320         enum ieee80211_roc_type type;
 321 };
 322
 323 /* flags used in struct ieee80211_if_managed.flags */
 324 enum ieee80211_sta_flags {
 325         IEEE80211_STA_BEACON_POLL       = BIT(0),
 326         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 327         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 328         IEEE80211_STA_DISABLE_HT        = BIT(4),
 329         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 330         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 331         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 332         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 333         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 334         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 335         IEEE80211_STA_DISABLE_VHT       = BIT(11),
 336         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
 337         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
 338 };
 339
 340 struct ieee80211_mgd_auth_data {
 341         struct cfg80211_bss *bss;
 342         unsigned long timeout;
 343         int tries;
 344         u16 algorithm, expected_transaction;
 345
 346         u8 key[WLAN_KEY_LEN_WEP104];
 347         u8 key_len, key_idx;
 348         bool done;
 349         bool timeout_started;
 350
 351         u16 sae_trans, sae_status;
 352         size_t data_len;
 353         u8 data[];
 354 };
 355
 356 struct ieee80211_mgd_assoc_data {
 357         struct cfg80211_bss *bss;
 358         const u8 *supp_rates;
 359
 360         unsigned long timeout;
 361         int tries;
 362
 363         u16 capability;
 364         u8 prev_bssid[ETH_ALEN];
 365         u8 ssid[IEEE80211_MAX_SSID_LEN];
 366         u8 ssid_len;
 367         u8 supp_rates_len;
 368         bool wmm, uapsd;
 369         bool have_beacon, need_beacon;
 370         bool synced;
 371         bool timeout_started;
 372
 373         u8 ap_ht_param;
 374
 375         struct ieee80211_vht_cap ap_vht_cap;
 376
 377         size_t ie_len;
 378         u8 ie[];
 379 };
 380
 381 struct ieee80211_if_managed {
 382         struct timer_list timer;
 383         struct timer_list conn_mon_timer;
 384         struct timer_list bcn_mon_timer;
 385         struct timer_list chswitch_timer;
 386         struct work_struct monitor_work;
 387         struct work_struct chswitch_work;
 388         struct work_struct beacon_connection_loss_work;
 389         struct work_struct csa_connection_drop_work;
 390
 391         unsigned long beacon_timeout;
 392         unsigned long probe_timeout;
 393         int probe_send_count;
 394         bool nullfunc_failed;
 395         bool connection_loss;
 396
 397         struct mutex mtx;
 398         struct cfg80211_bss *associated;
 399         struct ieee80211_mgd_auth_data *auth_data;
 400         struct ieee80211_mgd_assoc_data *assoc_data;
 401
 402         u8 bssid[ETH_ALEN];
 403
 404         u16 aid;
 405
 406         bool powersave; /* powersave requested for this iface */
 407         bool broken_ap; /* AP is broken -- turn off powersave */
 408         u8 dtim_period;
 409         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 410                                  driver_smps_mode; /* smps mode request */
 411
 412         struct work_struct request_smps_work;
 413
 414         unsigned int flags;
 415
 416         bool beacon_crc_valid;
 417         u32 beacon_crc;
 418
 419         bool status_acked;
 420         bool status_received;
 421         __le16 status_fc;
 422
 423         enum {
 424                 IEEE80211_MFP_DISABLED,
 425                 IEEE80211_MFP_OPTIONAL,
 426                 IEEE80211_MFP_REQUIRED
 427         } mfp; /* management frame protection */
 428
 429         /*
 430          * Bitmask of enabled u-apsd queues,
 431          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 432          * to take effect.
 433          */
 434         unsigned int uapsd_queues;
 435
 436         /*
 437          * Maximum number of buffered frames AP can deliver during a
 438          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 439          * Needs a new association to take effect.
 440          */
 441         unsigned int uapsd_max_sp_len;
 442
 443         int wmm_last_param_set;
 444
 445         u8 use_4addr;
 446
 447         s16 p2p_noa_index;
 448
 449         /* Signal strength from the last Beacon frame in the current BSS. */
 450         int last_beacon_signal;
 451
 452         /*
 453          * Weighted average of the signal strength from Beacon frames in the
 454          * current BSS. This is in units of 1/16 of the signal unit to maintain
 455          * accuracy and to speed up calculations, i.e., the value need to be
 456          * divided by 16 to get the actual value.
 457          */
 458         int ave_beacon_signal;
 459
 460         /*
 461          * Number of Beacon frames used in ave_beacon_signal. This can be used
 462          * to avoid generating less reliable cqm events that would be based
 463          * only on couple of received frames.
 464          */
 465         unsigned int count_beacon_signal;
 466
 467         /*
 468          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 469          * that triggered a cqm event. 0 indicates that no event has been
 470          * generated for the current association.
 471          */
 472         int last_cqm_event_signal;
 473
 474         /*
 475          * State variables for keeping track of RSSI of the AP currently
 476          * connected to and informing driver when RSSI has gone
 477          * below/above a certain threshold.
 478          */
 479         int rssi_min_thold, rssi_max_thold;
 480         int last_ave_beacon_signal;
 481
 482         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 483         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 484         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 485         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
 486 };
 487
 488 struct ieee80211_if_ibss {
 489         struct timer_list timer;
 490
 491         struct mutex mtx;
 492
 493         unsigned long last_scan_completed;
 494
 495         u32 basic_rates;
 496
 497         bool fixed_bssid;
 498         bool fixed_channel;
 499         bool privacy;
 500
 501         bool control_port;
 502         unsigned int auth_frame_registrations;
 503
 504         u8 bssid[ETH_ALEN] __aligned(2);
 505         u8 ssid[IEEE80211_MAX_SSID_LEN];
 506         u8 ssid_len, ie_len;
 507         u8 *ie;
 508         struct ieee80211_channel *channel;
 509         enum nl80211_channel_type channel_type;
 510
 511         unsigned long ibss_join_req;
 512         /* probe response/beacon for IBSS */
 513         struct beacon_data __rcu *presp;
 514
 515         spinlock_t incomplete_lock;
 516         struct list_head incomplete_stations;
 517
 518         enum {
 519                 IEEE80211_IBSS_MLME_SEARCH,
 520                 IEEE80211_IBSS_MLME_JOINED,
 521         } state;
 522 };
 523
 524 /**
 525  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 526  *
 527  * these declarations define the interface, which enables
 528  * vendor-specific mesh synchronization
 529  *
 530  */
 531 struct ieee802_11_elems;
 532 struct ieee80211_mesh_sync_ops {
 533         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 534                              u16 stype,
 535                              struct ieee80211_mgmt *mgmt,
 536                              struct ieee802_11_elems *elems,
 537                              struct ieee80211_rx_status *rx_status);
 538         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata);
 539         /* add other framework functions here */
 540 };
 541
 542 struct ieee80211_if_mesh {
 543         struct timer_list housekeeping_timer;
 544         struct timer_list mesh_path_timer;
 545         struct timer_list mesh_path_root_timer;
 546
 547         unsigned long wrkq_flags;
 548
 549         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 550         size_t mesh_id_len;
 551         /* Active Path Selection Protocol Identifier */
 552         u8 mesh_pp_id;
 553         /* Active Path Selection Metric Identifier */
 554         u8 mesh_pm_id;
 555         /* Congestion Control Mode Identifier */
 556         u8 mesh_cc_id;
 557         /* Synchronization Protocol Identifier */
 558         u8 mesh_sp_id;
 559         /* Authentication Protocol Identifier */
 560         u8 mesh_auth_id;
 561         /* Local mesh Sequence Number */
 562         u32 sn;
 563         /* Last used PREQ ID */
 564         u32 preq_id;
 565         atomic_t mpaths;
 566         /* Timestamp of last SN update */
 567         unsigned long last_sn_update;
 568         /* Time when it's ok to send next PERR */
 569         unsigned long next_perr;
 570         /* Timestamp of last PREQ sent */
 571         unsigned long last_preq;
 572         struct mesh_rmc *rmc;
 573         spinlock_t mesh_preq_queue_lock;
 574         struct mesh_preq_queue preq_queue;
 575         int preq_queue_len;
 576         struct mesh_stats mshstats;
 577         struct mesh_config mshcfg;
 578         atomic_t estab_plinks;
 579         u32 mesh_seqnum;
 580         bool accepting_plinks;
 581         int num_gates;
 582         struct beacon_data __rcu *beacon;
 583         /* just protects beacon updates for now */
 584         struct mutex mtx;
 585         const u8 *ie;
 586         u8 ie_len;
 587         enum {
 588                 IEEE80211_MESH_SEC_NONE = 0x0,
 589                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 590                 IEEE80211_MESH_SEC_SECURED = 0x2,
 591         } security;
 592         bool user_mpm;
 593         /* Extensible Synchronization Framework */
 594         const struct ieee80211_mesh_sync_ops *sync_ops;
 595         s64 sync_offset_clockdrift_max;
 596         spinlock_t sync_offset_lock;
 597         bool adjusting_tbtt;
 598         /* mesh power save */
 599         enum nl80211_mesh_power_mode nonpeer_pm;
 600         int ps_peers_light_sleep;
 601         int ps_peers_deep_sleep;
 602         struct ps_data ps;
 603 };
 604
 605 #ifdef CONFIG_MAC80211_MESH
 606 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 607         do { (msh)->mshstats.name++; } while (0)
 608 #else
 609 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 610         do { } while (0)
 611 #endif
 612
 613 /**
 614  * enum ieee80211_sub_if_data_flags - virtual interface flags
 615  *
 616  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 617  * @IEEE80211_SDATA_PROMISC: interface is promisc
 618  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 619  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 620  *      associated stations and deliver multicast frames both
 621  *      back to wireless media and to the local net stack.
 622  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 623  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 624  */
 625 enum ieee80211_sub_if_data_flags {
 626         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 627         IEEE80211_SDATA_PROMISC                 = BIT(1),
 628         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 629         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 630         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 631         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 632 };
 633
 634 /**
 635  * enum ieee80211_sdata_state_bits - virtual interface state bits
 636  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 637  *      mirrors netif_running() but is separate for interface type
 638  *      change handling while the interface is up
 639  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 640  *      mode, so queues are stopped
 641  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
 642  *      to offchannel, reset when offchannel returns
 643  */
 644 enum ieee80211_sdata_state_bits {
 645         SDATA_STATE_RUNNING,
 646         SDATA_STATE_OFFCHANNEL,
 647         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 648 };
 649
 650 /**
 651  * enum ieee80211_chanctx_mode - channel context configuration mode
 652  *
 653  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
 654  *      multiple interfaces
 655  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
 656  *      only by a single interface. This can be used for example for
 657  *      non-fixed channel IBSS.
 658  */
 659 enum ieee80211_chanctx_mode {
 660         IEEE80211_CHANCTX_SHARED,
 661         IEEE80211_CHANCTX_EXCLUSIVE
 662 };
 663
 664 struct ieee80211_chanctx {
 665         struct list_head list;
 666         struct rcu_head rcu_head;
 667
 668         enum ieee80211_chanctx_mode mode;
 669         int refcount;
 670         bool driver_present;
 671
 672         struct ieee80211_chanctx_conf conf;
 673 };
 674
 675 struct ieee80211_sub_if_data {
 676         struct list_head list;
 677
 678         struct wireless_dev wdev;
 679
 680         /* keys */
 681         struct list_head key_list;
 682
 683         /* count for keys needing tailroom space allocation */
 684         int crypto_tx_tailroom_needed_cnt;
 685         int crypto_tx_tailroom_pending_dec;
 686         struct delayed_work dec_tailroom_needed_wk;
 687
 688         struct net_device *dev;
 689         struct ieee80211_local *local;
 690
 691         unsigned int flags;
 692
 693         unsigned long state;
 694
 695         int drop_unencrypted;
 696
 697         char name[IFNAMSIZ];
 698
 699         /* Fragment table for host-based reassembly */
 700         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 701         unsigned int fragment_next;
 702
 703         /* TID bitmap for NoAck policy */
 704         u16 noack_map;
 705
 706         /* bit field of ACM bits (BIT(802.1D tag)) */
 707         u8 wmm_acm;
 708
 709         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 710         struct ieee80211_key __rcu *default_unicast_key;
 711         struct ieee80211_key __rcu *default_multicast_key;
 712         struct ieee80211_key __rcu *default_mgmt_key;
 713
 714         u16 sequence_number;
 715         __be16 control_port_protocol;
 716         bool control_port_no_encrypt;
 717
 718         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 719
 720         /* used to reconfigure hardware SM PS */
 721         struct work_struct recalc_smps;
 722
 723         struct work_struct work;
 724         struct sk_buff_head skb_queue;
 725
 726         u8 needed_rx_chains;
 727         enum ieee80211_smps_mode smps_mode;
 728
 729         int user_power_level; /* in dBm */
 730         int ap_power_level; /* in dBm */
 731
 732         bool radar_required;
 733         struct delayed_work dfs_cac_timer_work;
 734
 735         /*
 736          * AP this belongs to: self in AP mode and
 737          * corresponding AP in VLAN mode, NULL for
 738          * all others (might be needed later in IBSS)
 739          */
 740         struct ieee80211_if_ap *bss;
 741
 742         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 743         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 744
 745         bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
 746         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 747
 748         union {
 749                 struct ieee80211_if_ap ap;
 750                 struct ieee80211_if_wds wds;
 751                 struct ieee80211_if_vlan vlan;
 752                 struct ieee80211_if_managed mgd;
 753                 struct ieee80211_if_ibss ibss;
 754                 struct ieee80211_if_mesh mesh;
 755                 u32 mntr_flags;
 756         } u;
 757
 758         spinlock_t cleanup_stations_lock;
 759         struct list_head cleanup_stations;
 760         struct work_struct cleanup_stations_wk;
 761
 762 #ifdef CONFIG_MAC80211_DEBUGFS
 763         struct {
 764                 struct dentry *subdir_stations;
 765                 struct dentry *default_unicast_key;
 766                 struct dentry *default_multicast_key;
 767                 struct dentry *default_mgmt_key;
 768         } debugfs;
 769 #endif
 770
 771         /* must be last, dynamically sized area in this! */
 772         struct ieee80211_vif vif;
 773 };
 774
 775 static inline
 776 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 777 {
 778         return container_of(p, struct ieee80211_sub_if_data, vif);
 779 }
 780
 781 static inline enum ieee80211_band
 782 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
 783 {
 784         enum ieee80211_band band = IEEE80211_BAND_2GHZ;
 785         struct ieee80211_chanctx_conf *chanctx_conf;
 786
 787         rcu_read_lock();
 788         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 789         if (!WARN_ON(!chanctx_conf))
 790                 band = chanctx_conf->def.chan->band;
 791         rcu_read_unlock();
 792
 793         return band;
 794 }
 795
 796 enum sdata_queue_type {
 797         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 798         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 799         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 800 };
 801
 802 enum {
 803         IEEE80211_RX_MSG        = 1,
 804         IEEE80211_TX_STATUS_MSG = 2,
 805 };
 806
 807 enum queue_stop_reason {
 808         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 809         IEEE80211_QUEUE_STOP_REASON_PS,
 810         IEEE80211_QUEUE_STOP_REASON_CSA,
 811         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 812         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 813         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 814         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
 815         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 816 };
 817
 818 #ifdef CONFIG_MAC80211_LEDS
 819 struct tpt_led_trigger {
 820         struct led_trigger trig;
 821         char name[32];
 822         const struct ieee80211_tpt_blink *blink_table;
 823         unsigned int blink_table_len;
 824         struct timer_list timer;
 825         unsigned long prev_traffic;
 826         unsigned long tx_bytes, rx_bytes;
 827         unsigned int active, want;
 828         bool running;
 829 };
 830 #endif
 831
 832 /**
 833  * mac80211 scan flags - currently active scan mode
 834  *
 835  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 836  *      well be on the operating channel
 837  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 838  *      determine if we are on the operating channel or not
 839  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
 840  *      channel. This should not interrupt normal traffic.
 841  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 842  *      that the scan completed.
 843  * @SCAN_ABORTED: Set for our scan work function when the driver reported
 844  *      a scan complete for an aborted scan.
 845  */
 846 enum {
 847         SCAN_SW_SCANNING,
 848         SCAN_HW_SCANNING,
 849         SCAN_ONCHANNEL_SCANNING,
 850         SCAN_COMPLETED,
 851         SCAN_ABORTED,
 852 };
 853
 854 /**
 855  * enum mac80211_scan_state - scan state machine states
 856  *
 857  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 858  *      determines if we should keep on scanning or switch back to the
 859  *      operating channel
 860  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 861  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 862  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
 863  *      send out data
 864  * @SCAN_RESUME: Resume the scan and scan the next channel
 865  * @SCAN_ABORT: Abort the scan and go back to operating channel
 866  */
 867 enum mac80211_scan_state {
 868         SCAN_DECISION,
 869         SCAN_SET_CHANNEL,
 870         SCAN_SEND_PROBE,
 871         SCAN_SUSPEND,
 872         SCAN_RESUME,
 873         SCAN_ABORT,
 874 };
 875
 876 struct ieee80211_local {
 877         /* embed the driver visible part.
 878          * don't cast (use the static inlines below), but we keep
 879          * it first anyway so they become a no-op */
 880         struct ieee80211_hw hw;
 881
 882         const struct ieee80211_ops *ops;
 883
 884         /*
 885          * private workqueue to mac80211. mac80211 makes this accessible
 886          * via ieee80211_queue_work()
 887          */
 888         struct workqueue_struct *workqueue;
 889
 890         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 891         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 892         spinlock_t queue_stop_reason_lock;
 893
 894         int open_count;
 895         int monitors, cooked_mntrs;
 896         /* number of interfaces with corresponding FIF_ flags */
 897         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 898             fif_probe_req;
 899         int probe_req_reg;
 900         unsigned int filter_flags; /* FIF_* */
 901
 902         bool wiphy_ciphers_allocated;
 903
 904         bool use_chanctx;
 905
 906         /* protects the aggregated multicast list and filter calls */
 907         spinlock_t filter_lock;
 908
 909         /* used for uploading changed mc list */
 910         struct work_struct reconfig_filter;
 911
 912         /* aggregated multicast list */
 913         struct netdev_hw_addr_list mc_list;
 914
 915         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 916
 917         /*
 918          * suspended is true if we finished all the suspend _and_ we have
 919          * not yet come up from resume. This is to be used by mac80211
 920          * to ensure driver sanity during suspend and mac80211's own
 921          * sanity. It can eventually be used for WoW as well.
 922          */
 923         bool suspended;
 924
 925         /*
 926          * Resuming is true while suspended, but when we're reprogramming the
 927          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 928          * again even though some other parts of the stack are still suspended
 929          * and we still drop received frames to avoid waking the stack.
 930          */
 931         bool resuming;
 932
 933         /*
 934          * quiescing is true during the suspend process _only_ to
 935          * ease timer cancelling etc.
 936          */
 937         bool quiescing;
 938
 939         /* device is started */
 940         bool started;
 941
 942         /* device is during a HW reconfig */
 943         bool in_reconfig;
 944
 945         /* wowlan is enabled -- don't reconfig on resume */
 946         bool wowlan;
 947
 948         /* DFS/radar detection is enabled */
 949         bool radar_detect_enabled;
 950         struct work_struct radar_detected_work;
 951
 952         /* number of RX chains the hardware has */
 953         u8 rx_chains;
 954
 955         int tx_headroom; /* required headroom for hardware/radiotap */
 956
 957         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 958          * added to skb_queue will be processed, but frames in
 959          * skb_queue_unreliable may be dropped if the total length of these
 960          * queues increases over the limit. */
 961 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 962         struct tasklet_struct tasklet;
 963         struct sk_buff_head skb_queue;
 964         struct sk_buff_head skb_queue_unreliable;
 965
 966         spinlock_t rx_path_lock;
 967
 968         /* Station data */
 969         /*
 970          * The mutex only protects the list, hash table and
 971          * counter, reads are done with RCU.
 972          */
 973         struct mutex sta_mtx;
 974         spinlock_t tim_lock;
 975         unsigned long num_sta;
 976         struct list_head sta_list;
 977         struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
 978         struct timer_list sta_cleanup;
 979         int sta_generation;
 980
 981         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 982         struct tasklet_struct tx_pending_tasklet;
 983
 984         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 985
 986         /* number of interfaces with corresponding IFF_ flags */
 987         atomic_t iff_allmultis, iff_promiscs;
 988
 989         struct rate_control_ref *rate_ctrl;
 990
 991         struct crypto_cipher *wep_tx_tfm;
 992         struct crypto_cipher *wep_rx_tfm;
 993         u32 wep_iv;
 994
 995         /* see iface.c */
 996         struct list_head interfaces;
 997         struct mutex iflist_mtx;
 998
 999         /*
1000          * Key mutex, protects sdata's key_list and sta_info's
1001          * key pointers (write access, they're RCU.)
1002          */
1003         struct mutex key_mtx;
1004
1005         /* mutex for scan and work locking */
1006         struct mutex mtx;
1007
1008         /* Scanning and BSS list */
1009         unsigned long scanning;
1010         struct cfg80211_ssid scan_ssid;
1011         struct cfg80211_scan_request *int_scan_req;
1012         struct cfg80211_scan_request *scan_req, *hw_scan_req;
1013         struct ieee80211_channel *scan_channel;
1014         enum ieee80211_band hw_scan_band;
1015         int scan_channel_idx;
1016         int scan_ies_len;
1017         int hw_scan_ies_bufsize;
1018
1019         struct work_struct sched_scan_stopped_work;
1020         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1021
1022         unsigned long leave_oper_channel_time;
1023         enum mac80211_scan_state next_scan_state;
1024         struct delayed_work scan_work;
1025         struct ieee80211_sub_if_data __rcu *scan_sdata;
1026         struct cfg80211_chan_def csa_chandef;
1027         /* For backward compatibility only -- do not use */
1028         struct cfg80211_chan_def _oper_chandef;
1029
1030         /* Temporary remain-on-channel for off-channel operations */
1031         struct ieee80211_channel *tmp_channel;
1032
1033         /* channel contexts */
1034         struct list_head chanctx_list;
1035         struct mutex chanctx_mtx;
1036
1037         /* SNMP counters */
1038         /* dot11CountersTable */
1039         u32 dot11TransmittedFragmentCount;
1040         u32 dot11MulticastTransmittedFrameCount;
1041         u32 dot11FailedCount;
1042         u32 dot11RetryCount;
1043         u32 dot11MultipleRetryCount;
1044         u32 dot11FrameDuplicateCount;
1045         u32 dot11ReceivedFragmentCount;
1046         u32 dot11MulticastReceivedFrameCount;
1047         u32 dot11TransmittedFrameCount;
1048
1049 #ifdef CONFIG_MAC80211_LEDS
1050         int tx_led_counter, rx_led_counter;
1051         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
1052         struct tpt_led_trigger *tpt_led_trigger;
1053         char tx_led_name[32], rx_led_name[32],
1054              assoc_led_name[32], radio_led_name[32];
1055 #endif
1056
1057 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1058         /* TX/RX handler statistics */
1059         unsigned int tx_handlers_drop;
1060         unsigned int tx_handlers_queued;
1061         unsigned int tx_handlers_drop_unencrypted;
1062         unsigned int tx_handlers_drop_fragment;
1063         unsigned int tx_handlers_drop_wep;
1064         unsigned int tx_handlers_drop_not_assoc;
1065         unsigned int tx_handlers_drop_unauth_port;
1066         unsigned int rx_handlers_drop;
1067         unsigned int rx_handlers_queued;
1068         unsigned int rx_handlers_drop_nullfunc;
1069         unsigned int rx_handlers_drop_defrag;
1070         unsigned int rx_handlers_drop_short;
1071         unsigned int tx_expand_skb_head;
1072         unsigned int tx_expand_skb_head_cloned;
1073         unsigned int rx_expand_skb_head;
1074         unsigned int rx_expand_skb_head2;
1075         unsigned int rx_handlers_fragments;
1076         unsigned int tx_status_drop;
1077 #define I802_DEBUG_INC(c) (c)++
1078 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1079 #define I802_DEBUG_INC(c) do { } while (0)
1080 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1081
1082
1083         int total_ps_buffered; /* total number of all buffered unicast and
1084                                 * multicast packets for power saving stations
1085                                 */
1086
1087         bool pspolling;
1088         bool offchannel_ps_enabled;
1089         /*
1090          * PS can only be enabled when we have exactly one managed
1091          * interface (and monitors) in PS, this then points there.
1092          */
1093         struct ieee80211_sub_if_data *ps_sdata;
1094         struct work_struct dynamic_ps_enable_work;
1095         struct work_struct dynamic_ps_disable_work;
1096         struct timer_list dynamic_ps_timer;
1097         struct notifier_block network_latency_notifier;
1098         struct notifier_block ifa_notifier;
1099         struct notifier_block ifa6_notifier;
1100
1101         /*
1102          * The dynamic ps timeout configured from user space via WEXT -
1103          * this will override whatever chosen by mac80211 internally.
1104          */
1105         int dynamic_ps_forced_timeout;
1106
1107         int user_power_level; /* in dBm, for all interfaces */
1108
1109         enum ieee80211_smps_mode smps_mode;
1110
1111         struct work_struct restart_work;
1112
1113 #ifdef CONFIG_MAC80211_DEBUGFS
1114         struct local_debugfsdentries {
1115                 struct dentry *rcdir;
1116                 struct dentry *keys;
1117         } debugfs;
1118 #endif
1119
1120         /*
1121          * Remain-on-channel support
1122          */
1123         struct list_head roc_list;
1124         struct work_struct hw_roc_start, hw_roc_done;
1125         unsigned long hw_roc_start_time;
1126         u64 roc_cookie_counter;
1127
1128         struct idr ack_status_frames;
1129         spinlock_t ack_status_lock;
1130
1131         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1132
1133         /* virtual monitor interface */
1134         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1135         struct cfg80211_chan_def monitor_chandef;
1136 };
1137
1138 static inline struct ieee80211_sub_if_data *
1139 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1140 {
1141         return netdev_priv(dev);
1142 }
1143
1144 static inline struct ieee80211_sub_if_data *
1145 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1146 {
1147         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1148 }
1149
1150 /* this struct represents 802.11n's RA/TID combination */
1151 struct ieee80211_ra_tid {
1152         u8 ra[ETH_ALEN];
1153         u16 tid;
1154 };
1155
1156 /* Parsed Information Elements */
1157 struct ieee802_11_elems {
1158         const u8 *ie_start;
1159         size_t total_len;
1160
1161         /* pointers to IEs */
1162         const u8 *ssid;
1163         const u8 *supp_rates;
1164         const u8 *ds_params;
1165         const struct ieee80211_tim_ie *tim;
1166         const u8 *challenge;
1167         const u8 *rsn;
1168         const u8 *erp_info;
1169         const u8 *ext_supp_rates;
1170         const u8 *wmm_info;
1171         const u8 *wmm_param;
1172         const struct ieee80211_ht_cap *ht_cap_elem;
1173         const struct ieee80211_ht_operation *ht_operation;
1174         const struct ieee80211_vht_cap *vht_cap_elem;
1175         const struct ieee80211_vht_operation *vht_operation;
1176         const struct ieee80211_meshconf_ie *mesh_config;
1177         const u8 *mesh_id;
1178         const u8 *peering;
1179         const __le16 *awake_window;
1180         const u8 *preq;
1181         const u8 *prep;
1182         const u8 *perr;
1183         const struct ieee80211_rann_ie *rann;
1184         const struct ieee80211_channel_sw_ie *ch_switch_ie;
1185         const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1186         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1187         const u8 *country_elem;
1188         const u8 *pwr_constr_elem;
1189         const struct ieee80211_timeout_interval_ie *timeout_int;
1190         const u8 *opmode_notif;
1191         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1192
1193         /* length of them, respectively */
1194         u8 ssid_len;
1195         u8 supp_rates_len;
1196         u8 tim_len;
1197         u8 challenge_len;
1198         u8 rsn_len;
1199         u8 ext_supp_rates_len;
1200         u8 wmm_info_len;
1201         u8 wmm_param_len;
1202         u8 mesh_id_len;
1203         u8 peering_len;
1204         u8 preq_len;
1205         u8 prep_len;
1206         u8 perr_len;
1207         u8 country_elem_len;
1208
1209         /* whether a parse error occurred while retrieving these elements */
1210         bool parse_error;
1211 };
1212
1213 static inline struct ieee80211_local *hw_to_local(
1214         struct ieee80211_hw *hw)
1215 {
1216         return container_of(hw, struct ieee80211_local, hw);
1217 }
1218
1219
1220 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1221 {
1222         return ether_addr_equal(raddr, addr) ||
1223                is_broadcast_ether_addr(raddr);
1224 }
1225
1226 static inline bool
1227 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1228 {
1229         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1230                      status->flag & RX_FLAG_MACTIME_END);
1231         return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1232 }
1233
1234 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1235                                      struct ieee80211_rx_status *status,
1236                                      unsigned int mpdu_len,
1237                                      unsigned int mpdu_offset);
1238 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1239 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1240 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1241                                       u32 changed);
1242 void ieee80211_configure_filter(struct ieee80211_local *local);
1243 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1244
1245 /* STA code */
1246 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1247 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1248                        struct cfg80211_auth_request *req);
1249 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1250                         struct cfg80211_assoc_request *req);
1251 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1252                          struct cfg80211_deauth_request *req);
1253 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1254                            struct cfg80211_disassoc_request *req);
1255 void ieee80211_send_pspoll(struct ieee80211_local *local,
1256                            struct ieee80211_sub_if_data *sdata);
1257 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1258 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1259 int ieee80211_max_network_latency(struct notifier_block *nb,
1260                                   unsigned long data, void *dummy);
1261 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1262 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1263 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1264                                   struct sk_buff *skb);
1265 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1266 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1267 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1268 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1269                                   __le16 fc, bool acked);
1270 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1271
1272 /* IBSS code */
1273 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1274 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1275 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1276                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1277 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1278                         struct cfg80211_ibss_params *params);
1279 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1280 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1281 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1282                                    struct sk_buff *skb);
1283
1284 /* mesh code */
1285 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1286 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1287                                    struct sk_buff *skb);
1288
1289 /* scan/BSS handling */
1290 void ieee80211_scan_work(struct work_struct *work);
1291 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1292                                 const u8 *ssid, u8 ssid_len,
1293                                 struct ieee80211_channel *chan);
1294 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1295                            struct cfg80211_scan_request *req);
1296 void ieee80211_scan_cancel(struct ieee80211_local *local);
1297 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1298 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1299
1300 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1301 struct ieee80211_bss *
1302 ieee80211_bss_info_update(struct ieee80211_local *local,
1303                           struct ieee80211_rx_status *rx_status,
1304                           struct ieee80211_mgmt *mgmt,
1305                           size_t len,
1306                           struct ieee802_11_elems *elems,
1307                           struct ieee80211_channel *channel);
1308 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1309                           struct ieee80211_bss *bss);
1310
1311 /* scheduled scan handling */
1312 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1313                                        struct cfg80211_sched_scan_request *req);
1314 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1315 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1316
1317 /* off-channel helpers */
1318 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1319 void ieee80211_offchannel_return(struct ieee80211_local *local);
1320 void ieee80211_roc_setup(struct ieee80211_local *local);
1321 void ieee80211_start_next_roc(struct ieee80211_local *local);
1322 void ieee80211_roc_purge(struct ieee80211_local *local,
1323                          struct ieee80211_sub_if_data *sdata);
1324 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
1325 void ieee80211_sw_roc_work(struct work_struct *work);
1326 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1327
1328 /* interface handling */
1329 int ieee80211_iface_init(void);
1330 void ieee80211_iface_exit(void);
1331 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1332                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1333                      struct vif_params *params);
1334 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1335                              enum nl80211_iftype type);
1336 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1337 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1338 u32 ieee80211_idle_off(struct ieee80211_local *local);
1339 void ieee80211_recalc_idle(struct ieee80211_local *local);
1340 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1341                                     const int offset);
1342 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1343 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1344 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1345 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1346
1347 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1348 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1349
1350 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1351 {
1352         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1353 }
1354
1355 /* tx handling */
1356 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1357 void ieee80211_tx_pending(unsigned long data);
1358 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1359                                          struct net_device *dev);
1360 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1361                                        struct net_device *dev);
1362 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1363                               struct sk_buff_head *skbs);
1364
1365 /* HT */
1366 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1367                                      struct ieee80211_sta_ht_cap *ht_cap);
1368 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1369                                        struct ieee80211_supported_band *sband,
1370                                        const struct ieee80211_ht_cap *ht_cap_ie,
1371                                        struct sta_info *sta);
1372 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1373                           const u8 *da, u16 tid,
1374                           u16 initiator, u16 reason_code);
1375 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1376                                enum ieee80211_smps_mode smps, const u8 *da,
1377                                const u8 *bssid);
1378 void ieee80211_request_smps_work(struct work_struct *work);
1379
1380 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1381                                      u16 initiator, u16 reason, bool stop);
1382 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1383                                     u16 initiator, u16 reason, bool stop);
1384 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1385                                          enum ieee80211_agg_stop_reason reason);
1386 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1387                              struct sta_info *sta,
1388                              struct ieee80211_mgmt *mgmt, size_t len);
1389 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1390                                   struct sta_info *sta,
1391                                   struct ieee80211_mgmt *mgmt,
1392                                   size_t len);
1393 void ieee80211_process_addba_request(struct ieee80211_local *local,
1394                                      struct sta_info *sta,
1395                                      struct ieee80211_mgmt *mgmt,
1396                                      size_t len);
1397
1398 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1399                                    enum ieee80211_agg_stop_reason reason);
1400 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1401                                     enum ieee80211_agg_stop_reason reason);
1402 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1403 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1404 void ieee80211_ba_session_work(struct work_struct *work);
1405 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1406 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1407
1408 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1409
1410 /* VHT */
1411 void
1412 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1413                                     struct ieee80211_supported_band *sband,
1414                                     const struct ieee80211_vht_cap *vht_cap_ie,
1415                                     struct sta_info *sta);
1416 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1417 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1418 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1419                                  struct sta_info *sta, u8 opmode,
1420                                  enum ieee80211_band band, bool nss_only);
1421 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1422                                       struct ieee80211_sta_vht_cap *vht_cap);
1423
1424 /* Spectrum management */
1425 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1426                                        struct ieee80211_mgmt *mgmt,
1427                                        size_t len);
1428
1429 /* Suspend/resume and hw reconfiguration */
1430 int ieee80211_reconfig(struct ieee80211_local *local);
1431 void ieee80211_stop_device(struct ieee80211_local *local);
1432
1433 int __ieee80211_suspend(struct ieee80211_hw *hw,
1434                         struct cfg80211_wowlan *wowlan);
1435
1436 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1437 {
1438         struct ieee80211_local *local = hw_to_local(hw);
1439
1440         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1441                 "%s: resume with hardware scan still in progress\n",
1442                 wiphy_name(hw->wiphy));
1443
1444         return ieee80211_reconfig(hw_to_local(hw));
1445 }
1446
1447 /* utility functions/constants */
1448 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1449 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1450                         enum nl80211_iftype type);
1451 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1452                              int rate, int erp, int short_preamble);
1453 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1454                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1455                                      gfp_t gfp);
1456 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1457                                bool bss_notify);
1458 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1459                     enum ieee80211_band band);
1460
1461 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1462                                  struct sk_buff *skb, int tid,
1463                                  enum ieee80211_band band);
1464
1465 static inline void
1466 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1467                           struct sk_buff *skb, int tid,
1468                           enum ieee80211_band band)
1469 {
1470         rcu_read_lock();
1471         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1472         rcu_read_unlock();
1473 }
1474
1475 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1476                                         struct sk_buff *skb, int tid)
1477 {
1478         struct ieee80211_chanctx_conf *chanctx_conf;
1479
1480         rcu_read_lock();
1481         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1482         if (WARN_ON(!chanctx_conf)) {
1483                 rcu_read_unlock();
1484                 kfree_skb(skb);
1485                 return;
1486         }
1487
1488         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1489                                     chanctx_conf->def.chan->band);
1490         rcu_read_unlock();
1491 }
1492
1493 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1494                                     struct sk_buff *skb)
1495 {
1496         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1497         ieee80211_tx_skb_tid(sdata, skb, 7);
1498 }
1499
1500 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, bool action,
1501                                struct ieee802_11_elems *elems,
1502                                u64 filter, u32 crc);
1503 static inline void ieee802_11_parse_elems(u8 *start, size_t len, bool action,
1504                                           struct ieee802_11_elems *elems)
1505 {
1506         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1507 }
1508
1509 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1510                               enum ieee80211_band band);
1511
1512 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1513 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1514 void ieee80211_dynamic_ps_timer(unsigned long data);
1515 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1516                              struct ieee80211_sub_if_data *sdata,
1517                              int powersave);
1518 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1519                              struct ieee80211_hdr *hdr);
1520 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1521                              struct ieee80211_hdr *hdr, bool ack);
1522
1523 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1524                                      unsigned long queues,
1525                                      enum queue_stop_reason reason);
1526 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1527                                      unsigned long queues,
1528                                      enum queue_stop_reason reason);
1529 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1530                                     enum queue_stop_reason reason);
1531 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1532                                     enum queue_stop_reason reason);
1533 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1534 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1535                                struct sk_buff *skb);
1536 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1537                                    struct sk_buff_head *skbs,
1538                                    void (*fn)(void *data), void *data);
1539 static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1540                                               struct sk_buff_head *skbs)
1541 {
1542         ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
1543 }
1544 void ieee80211_flush_queues(struct ieee80211_local *local,
1545                             struct ieee80211_sub_if_data *sdata);
1546
1547 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1548                          u16 transaction, u16 auth_alg, u16 status,
1549                          const u8 *extra, size_t extra_len, const u8 *bssid,
1550                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1551                          u32 tx_flags);
1552 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1553                                     const u8 *bssid, u16 stype, u16 reason,
1554                                     bool send_frame, u8 *frame_buf);
1555 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1556                              size_t buffer_len, const u8 *ie, size_t ie_len,
1557                              enum ieee80211_band band, u32 rate_mask,
1558                              u8 channel);
1559 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1560                                           u8 *dst, u32 ratemask,
1561                                           struct ieee80211_channel *chan,
1562                                           const u8 *ssid, size_t ssid_len,
1563                                           const u8 *ie, size_t ie_len,
1564                                           bool directed);
1565 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1566                               const u8 *ssid, size_t ssid_len,
1567                               const u8 *ie, size_t ie_len,
1568                               u32 ratemask, bool directed, u32 tx_flags,
1569                               struct ieee80211_channel *channel, bool scan);
1570
1571 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1572                                   const size_t supp_rates_len,
1573                                   const u8 *supp_rates);
1574 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1575                             struct ieee802_11_elems *elems,
1576                             enum ieee80211_band band, u32 *basic_rates);
1577 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1578                              enum ieee80211_smps_mode smps_mode);
1579 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1580
1581 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1582                           const u8 *ids, int n_ids, size_t offset);
1583 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1584 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1585                               u16 cap);
1586 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1587                                const struct cfg80211_chan_def *chandef,
1588                                u16 prot_mode);
1589 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1590                                u32 cap);
1591 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1592                             struct sk_buff *skb, bool need_basic,
1593                             enum ieee80211_band band);
1594 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1595                                 struct sk_buff *skb, bool need_basic,
1596                                 enum ieee80211_band band);
1597
1598 /* channel management */
1599 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1600                                   const struct ieee80211_ht_operation *ht_oper,
1601                                   struct cfg80211_chan_def *chandef);
1602
1603 int __must_check
1604 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1605                           const struct cfg80211_chan_def *chandef,
1606                           enum ieee80211_chanctx_mode mode);
1607 int __must_check
1608 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
1609                                const struct cfg80211_chan_def *chandef,
1610                                u32 *changed);
1611 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
1612 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
1613 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
1614                                          bool clear);
1615
1616 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
1617                                    struct ieee80211_chanctx *chanctx);
1618 void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
1619                                     struct ieee80211_chanctx *chanctx);
1620
1621 void ieee80211_dfs_cac_timer(unsigned long data);
1622 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
1623 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
1624 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
1625
1626 #ifdef CONFIG_MAC80211_NOINLINE
1627 #define debug_noinline noinline
1628 #else
1629 #define debug_noinline
1630 #endif
1631
1632 #endif /* IEEE80211_I_H */