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 2007-2008  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 <net/ieee80211_radiotap.h>
  27 #include <net/cfg80211.h>
  28 #include <net/mac80211.h>
  29 #include "key.h"
  30 #include "sta_info.h"
  31
  32 struct ieee80211_local;
  33
  34 /* Maximum number of broadcast/multicast frames to buffer when some of the
  35  * associated stations are using power saving. */
  36 #define AP_MAX_BC_BUFFER 128
  37
  38 /* Maximum number of frames buffered to all STAs, including multicast frames.
  39  * Note: increasing this limit increases the potential memory requirement. Each
  40  * frame can be up to about 2 kB long. */
  41 #define TOTAL_MAX_TX_BUFFER 512
  42
  43 /* Required encryption head and tailroom */
  44 #define IEEE80211_ENCRYPT_HEADROOM 8
  45 #define IEEE80211_ENCRYPT_TAILROOM 18
  46
  47 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  48  * reception of at least three fragmented frames. This limit can be increased
  49  * by changing this define, at the cost of slower frame reassembly and
  50  * increased memory use (about 2 kB of RAM per entry). */
  51 #define IEEE80211_FRAGMENT_MAX 4
  52
  53 /*
  54  * Time after which we ignore scan results and no longer report/use
  55  * them in any way.
  56  */
  57 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  58
  59 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  60
  61 struct ieee80211_fragment_entry {
  62         unsigned long first_frag_time;
  63         unsigned int seq;
  64         unsigned int rx_queue;
  65         unsigned int last_frag;
  66         unsigned int extra_len;
  67         struct sk_buff_head skb_list;
  68         int ccmp; /* Whether fragments were encrypted with CCMP */
  69         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  70 };
  71
  72
  73 struct ieee80211_bss {
  74         /* Yes, this is a hack */
  75         struct cfg80211_bss cbss;
  76
  77         /* don't want to look up all the time */
  78         size_t ssid_len;
  79         u8 ssid[IEEE80211_MAX_SSID_LEN];
  80
  81         u8 dtim_period;
  82
  83         bool wmm_used;
  84
  85         unsigned long last_probe_resp;
  86
  87 #ifdef CONFIG_MAC80211_MESH
  88         u8 *mesh_id;
  89         size_t mesh_id_len;
  90         u8 *mesh_cfg;
  91 #endif
  92
  93 #define IEEE80211_MAX_SUPP_RATES 32
  94         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  95         size_t supp_rates_len;
  96
  97         /*
  98          * During assocation, we save an ERP value from a probe response so
  99          * that we can feed ERP info to the driver when handling the
 100          * association completes. these fields probably won't be up-to-date
 101          * otherwise, you probably don't want to use them.
 102          */
 103         bool has_erp_value;
 104         u8 erp_value;
 105 };
 106
 107 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 108 {
 109 #ifdef CONFIG_MAC80211_MESH
 110         return bss->mesh_cfg;
 111 #endif
 112         return NULL;
 113 }
 114
 115 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 116 {
 117 #ifdef CONFIG_MAC80211_MESH
 118         return bss->mesh_id;
 119 #endif
 120         return NULL;
 121 }
 122
 123 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 124 {
 125 #ifdef CONFIG_MAC80211_MESH
 126         return bss->mesh_id_len;
 127 #endif
 128         return 0;
 129 }
 130
 131
 132 typedef unsigned __bitwise__ ieee80211_tx_result;
 133 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 134 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 135 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 136
 137 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 138 #define IEEE80211_TX_UNICAST            BIT(1)
 139 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 140
 141 struct ieee80211_tx_data {
 142         struct sk_buff *skb;
 143         struct ieee80211_local *local;
 144         struct ieee80211_sub_if_data *sdata;
 145         struct sta_info *sta;
 146         struct ieee80211_key *key;
 147
 148         struct ieee80211_channel *channel;
 149
 150         u16 ethertype;
 151         unsigned int flags;
 152 };
 153
 154
 155 typedef unsigned __bitwise__ ieee80211_rx_result;
 156 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 157 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 158 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 159 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 160
 161 #define IEEE80211_RX_IN_SCAN            BIT(0)
 162 /* frame is destined to interface currently processed (incl. multicast frames) */
 163 #define IEEE80211_RX_RA_MATCH           BIT(1)
 164 #define IEEE80211_RX_AMSDU              BIT(2)
 165 #define IEEE80211_RX_FRAGMENTED         BIT(3)
 166 /* only add flags here that do not change with subframes of an aMPDU */
 167
 168 struct ieee80211_rx_data {
 169         struct sk_buff *skb;
 170         struct ieee80211_local *local;
 171         struct ieee80211_sub_if_data *sdata;
 172         struct sta_info *sta;
 173         struct ieee80211_key *key;
 174
 175         unsigned int flags;
 176         int queue;
 177         u32 tkip_iv32;
 178         u16 tkip_iv16;
 179 };
 180
 181 struct beacon_data {
 182         u8 *head, *tail;
 183         int head_len, tail_len;
 184         int dtim_period;
 185 };
 186
 187 struct ieee80211_if_ap {
 188         struct beacon_data *beacon;
 189
 190         struct list_head vlans;
 191
 192         /* yes, this looks ugly, but guarantees that we can later use
 193          * bitmap_empty :)
 194          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 195         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 196         struct sk_buff_head ps_bc_buf;
 197         atomic_t num_sta_ps; /* number of stations in PS mode */
 198         int dtim_count;
 199 };
 200
 201 struct ieee80211_if_wds {
 202         struct sta_info *sta;
 203         u8 remote_addr[ETH_ALEN];
 204 };
 205
 206 struct ieee80211_if_vlan {
 207         struct list_head list;
 208
 209         /* used for all tx if the VLAN is configured to 4-addr mode */
 210         struct sta_info *sta;
 211 };
 212
 213 struct mesh_stats {
 214         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 215         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 216         __u32 fwded_frames;             /* Mesh total forwarded frames */
 217         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 218         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 219         atomic_t estab_plinks;
 220 };
 221
 222 #define PREQ_Q_F_START          0x1
 223 #define PREQ_Q_F_REFRESH        0x2
 224 struct mesh_preq_queue {
 225         struct list_head list;
 226         u8 dst[ETH_ALEN];
 227         u8 flags;
 228 };
 229
 230 enum ieee80211_mgd_state {
 231         IEEE80211_MGD_STATE_INVALID,
 232         IEEE80211_MGD_STATE_PROBE,
 233         IEEE80211_MGD_STATE_AUTH,
 234         IEEE80211_MGD_STATE_ASSOC,
 235 };
 236
 237 struct ieee80211_mgd_work {
 238         struct list_head list;
 239         struct ieee80211_bss *bss;
 240         int ie_len;
 241         u8 prev_bssid[ETH_ALEN];
 242         u8 ssid[IEEE80211_MAX_SSID_LEN];
 243         u8 ssid_len;
 244         unsigned long timeout;
 245         enum ieee80211_mgd_state state;
 246         u16 auth_alg, auth_transaction;
 247
 248         int tries;
 249
 250         u8 key[WLAN_KEY_LEN_WEP104];
 251         u8 key_len, key_idx;
 252
 253         /* must be last */
 254         u8 ie[0]; /* for auth or assoc frame, not probe */
 255 };
 256
 257 /* flags used in struct ieee80211_if_managed.flags */
 258 enum ieee80211_sta_flags {
 259         IEEE80211_STA_BEACON_POLL       = BIT(0),
 260         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 261         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 262         IEEE80211_STA_WMM_ENABLED       = BIT(3),
 263         IEEE80211_STA_DISABLE_11N       = BIT(4),
 264         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 265         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 266 };
 267
 268 /* flags for MLME request */
 269 enum ieee80211_sta_request {
 270         IEEE80211_STA_REQ_SCAN,
 271 };
 272
 273 struct ieee80211_if_managed {
 274         struct timer_list timer;
 275         struct timer_list conn_mon_timer;
 276         struct timer_list bcn_mon_timer;
 277         struct timer_list chswitch_timer;
 278         struct work_struct work;
 279         struct work_struct monitor_work;
 280         struct work_struct chswitch_work;
 281         struct work_struct beacon_loss_work;
 282
 283         unsigned long probe_timeout;
 284         int probe_send_count;
 285
 286         struct mutex mtx;
 287         struct ieee80211_bss *associated;
 288         struct list_head work_list;
 289
 290         u8 bssid[ETH_ALEN];
 291
 292         u16 aid;
 293         u16 capab;
 294
 295         struct sk_buff_head skb_queue;
 296
 297         unsigned long timers_running; /* used for quiesce/restart */
 298         bool powersave; /* powersave requested for this iface */
 299         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 300                                  ap_smps; /* smps mode AP thinks we're in */
 301
 302         unsigned long request;
 303
 304         unsigned int flags;
 305
 306         u32 beacon_crc;
 307
 308         enum {
 309                 IEEE80211_MFP_DISABLED,
 310                 IEEE80211_MFP_OPTIONAL,
 311                 IEEE80211_MFP_REQUIRED
 312         } mfp; /* management frame protection */
 313
 314         int wmm_last_param_set;
 315
 316         u8 use_4addr;
 317 };
 318
 319 enum ieee80211_ibss_request {
 320         IEEE80211_IBSS_REQ_RUN  = 0,
 321 };
 322
 323 struct ieee80211_if_ibss {
 324         struct timer_list timer;
 325         struct work_struct work;
 326
 327         struct sk_buff_head skb_queue;
 328
 329         unsigned long request;
 330         unsigned long last_scan_completed;
 331
 332         bool timer_running;
 333
 334         bool fixed_bssid;
 335         bool fixed_channel;
 336         bool privacy;
 337
 338         u8 bssid[ETH_ALEN];
 339         u8 ssid[IEEE80211_MAX_SSID_LEN];
 340         u8 ssid_len, ie_len;
 341         u8 *ie;
 342         struct ieee80211_channel *channel;
 343
 344         unsigned long ibss_join_req;
 345         /* probe response/beacon for IBSS */
 346         struct sk_buff *presp, *skb;
 347
 348         enum {
 349                 IEEE80211_IBSS_MLME_SEARCH,
 350                 IEEE80211_IBSS_MLME_JOINED,
 351         } state;
 352 };
 353
 354 struct ieee80211_if_mesh {
 355         struct work_struct work;
 356         struct timer_list housekeeping_timer;
 357         struct timer_list mesh_path_timer;
 358         struct timer_list mesh_path_root_timer;
 359         struct sk_buff_head skb_queue;
 360
 361         unsigned long timers_running;
 362
 363         unsigned long wrkq_flags;
 364
 365         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 366         size_t mesh_id_len;
 367         /* Active Path Selection Protocol Identifier */
 368         u8 mesh_pp_id;
 369         /* Active Path Selection Metric Identifier */
 370         u8 mesh_pm_id;
 371         /* Congestion Control Mode Identifier */
 372         u8 mesh_cc_id;
 373         /* Synchronization Protocol Identifier */
 374         u8 mesh_sp_id;
 375         /* Authentication Protocol Identifier */
 376         u8 mesh_auth_id;
 377         /* Local mesh Sequence Number */
 378         u32 sn;
 379         /* Last used PREQ ID */
 380         u32 preq_id;
 381         atomic_t mpaths;
 382         /* Timestamp of last SN update */
 383         unsigned long last_sn_update;
 384         /* Timestamp of last SN sent */
 385         unsigned long last_preq;
 386         struct mesh_rmc *rmc;
 387         spinlock_t mesh_preq_queue_lock;
 388         struct mesh_preq_queue preq_queue;
 389         int preq_queue_len;
 390         struct mesh_stats mshstats;
 391         struct mesh_config mshcfg;
 392         u32 mesh_seqnum;
 393         bool accepting_plinks;
 394 };
 395
 396 #ifdef CONFIG_MAC80211_MESH
 397 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 398         do { (msh)->mshstats.name++; } while (0)
 399 #else
 400 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 401         do { } while (0)
 402 #endif
 403
 404 /**
 405  * enum ieee80211_sub_if_data_flags - virtual interface flags
 406  *
 407  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 408  * @IEEE80211_SDATA_PROMISC: interface is promisc
 409  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 410  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 411  *      associated stations and deliver multicast frames both
 412  *      back to wireless media and to the local net stack.
 413  */
 414 enum ieee80211_sub_if_data_flags {
 415         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 416         IEEE80211_SDATA_PROMISC                 = BIT(1),
 417         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 418         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 419 };
 420
 421 struct ieee80211_sub_if_data {
 422         struct list_head list;
 423
 424         struct wireless_dev wdev;
 425
 426         /* keys */
 427         struct list_head key_list;
 428
 429         struct net_device *dev;
 430         struct ieee80211_local *local;
 431
 432         unsigned int flags;
 433
 434         int drop_unencrypted;
 435
 436         char name[IFNAMSIZ];
 437
 438         /*
 439          * keep track of whether the HT opmode (stored in
 440          * vif.bss_info.ht_operation_mode) is valid.
 441          */
 442         bool ht_opmode_valid;
 443
 444         /* Fragment table for host-based reassembly */
 445         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 446         unsigned int fragment_next;
 447
 448 #define NUM_DEFAULT_KEYS 4
 449 #define NUM_DEFAULT_MGMT_KEYS 2
 450         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 451         struct ieee80211_key *default_key;
 452         struct ieee80211_key *default_mgmt_key;
 453
 454         u16 sequence_number;
 455
 456         /*
 457          * AP this belongs to: self in AP mode and
 458          * corresponding AP in VLAN mode, NULL for
 459          * all others (might be needed later in IBSS)
 460          */
 461         struct ieee80211_if_ap *bss;
 462
 463         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 464         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 465
 466         union {
 467                 struct ieee80211_if_ap ap;
 468                 struct ieee80211_if_wds wds;
 469                 struct ieee80211_if_vlan vlan;
 470                 struct ieee80211_if_managed mgd;
 471                 struct ieee80211_if_ibss ibss;
 472 #ifdef CONFIG_MAC80211_MESH
 473                 struct ieee80211_if_mesh mesh;
 474 #endif
 475                 u32 mntr_flags;
 476         } u;
 477
 478 #ifdef CONFIG_MAC80211_DEBUGFS
 479         struct {
 480                 struct dentry *dir;
 481                 struct dentry *default_key;
 482                 struct dentry *default_mgmt_key;
 483         } debugfs;
 484 #endif
 485         /* must be last, dynamically sized area in this! */
 486         struct ieee80211_vif vif;
 487 };
 488
 489 static inline
 490 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 491 {
 492         return container_of(p, struct ieee80211_sub_if_data, vif);
 493 }
 494
 495 static inline void
 496 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 497                             u8 mesh_id_len, u8 *mesh_id)
 498 {
 499 #ifdef CONFIG_MAC80211_MESH
 500         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 501         ifmsh->mesh_id_len = mesh_id_len;
 502         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 503 #else
 504         WARN_ON(1);
 505 #endif
 506 }
 507
 508 enum {
 509         IEEE80211_RX_MSG        = 1,
 510         IEEE80211_TX_STATUS_MSG = 2,
 511         IEEE80211_DELBA_MSG     = 3,
 512         IEEE80211_ADDBA_MSG     = 4,
 513 };
 514
 515 enum queue_stop_reason {
 516         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 517         IEEE80211_QUEUE_STOP_REASON_PS,
 518         IEEE80211_QUEUE_STOP_REASON_CSA,
 519         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 520         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 521         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 522 };
 523
 524 /**
 525  * mac80211 scan flags - currently active scan mode
 526  *
 527  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 528  *      well be on the operating channel
 529  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 530  *      determine if we are on the operating channel or not
 531  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 532  *      gets only set in conjunction with SCAN_SW_SCANNING
 533  */
 534 enum {
 535         SCAN_SW_SCANNING,
 536         SCAN_HW_SCANNING,
 537         SCAN_OFF_CHANNEL,
 538 };
 539
 540 /**
 541  * enum mac80211_scan_state - scan state machine states
 542  *
 543  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 544  *      determines if we should keep on scanning or switch back to the
 545  *      operating channel
 546  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 547  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 548  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 549  *      about us leaving the channel and stop all associated STA interfaces
 550  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 551  *      AP about us being back and restart all associated STA interfaces
 552  */
 553 enum mac80211_scan_state {
 554         SCAN_DECISION,
 555         SCAN_SET_CHANNEL,
 556         SCAN_SEND_PROBE,
 557         SCAN_LEAVE_OPER_CHANNEL,
 558         SCAN_ENTER_OPER_CHANNEL,
 559 };
 560
 561 struct ieee80211_local {
 562         /* embed the driver visible part.
 563          * don't cast (use the static inlines below), but we keep
 564          * it first anyway so they become a no-op */
 565         struct ieee80211_hw hw;
 566
 567         const struct ieee80211_ops *ops;
 568
 569         /*
 570          * private workqueue to mac80211. mac80211 makes this accessible
 571          * via ieee80211_queue_work()
 572          */
 573         struct workqueue_struct *workqueue;
 574
 575         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 576         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 577         spinlock_t queue_stop_reason_lock;
 578
 579         int open_count;
 580         int monitors, cooked_mntrs;
 581         /* number of interfaces with corresponding FIF_ flags */
 582         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
 583         unsigned int filter_flags; /* FIF_* */
 584
 585         /* protects the aggregated multicast list and filter calls */
 586         spinlock_t filter_lock;
 587
 588         /* used for uploading changed mc list */
 589         struct work_struct reconfig_filter;
 590
 591         /* used to reconfigure hardware SM PS */
 592         struct work_struct recalc_smps;
 593
 594         /* aggregated multicast list */
 595         struct dev_addr_list *mc_list;
 596         int mc_count;
 597
 598         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 599
 600         /*
 601          * suspended is true if we finished all the suspend _and_ we have
 602          * not yet come up from resume. This is to be used by mac80211
 603          * to ensure driver sanity during suspend and mac80211's own
 604          * sanity. It can eventually be used for WoW as well.
 605          */
 606         bool suspended;
 607
 608         /*
 609          * Resuming is true while suspended, but when we're reprogramming the
 610          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 611          * again even though some other parts of the stack are still suspended
 612          * and we still drop received frames to avoid waking the stack.
 613          */
 614         bool resuming;
 615
 616         /*
 617          * quiescing is true during the suspend process _only_ to
 618          * ease timer cancelling etc.
 619          */
 620         bool quiescing;
 621
 622         /* device is started */
 623         bool started;
 624
 625         int tx_headroom; /* required headroom for hardware/radiotap */
 626
 627         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 628          * added to skb_queue will be processed, but frames in
 629          * skb_queue_unreliable may be dropped if the total length of these
 630          * queues increases over the limit. */
 631 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 632         struct tasklet_struct tasklet;
 633         struct sk_buff_head skb_queue;
 634         struct sk_buff_head skb_queue_unreliable;
 635
 636         /* Station data */
 637         /*
 638          * The lock only protects the list, hash, timer and counter
 639          * against manipulation, reads are done in RCU. Additionally,
 640          * the lock protects each BSS's TIM bitmap.
 641          */
 642         spinlock_t sta_lock;
 643         unsigned long num_sta;
 644         struct list_head sta_list;
 645         struct sta_info *sta_hash[STA_HASH_SIZE];
 646         struct timer_list sta_cleanup;
 647         int sta_generation;
 648
 649         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 650         struct tasklet_struct tx_pending_tasklet;
 651
 652         /*
 653          * This lock is used to prevent concurrent A-MPDU
 654          * session start/stop processing, this thus also
 655          * synchronises the ->ampdu_action() callback to
 656          * drivers and limits it to one at a time.
 657          */
 658         spinlock_t ampdu_lock;
 659
 660         /* number of interfaces with corresponding IFF_ flags */
 661         atomic_t iff_allmultis, iff_promiscs;
 662
 663         struct rate_control_ref *rate_ctrl;
 664
 665         struct crypto_blkcipher *wep_tx_tfm;
 666         struct crypto_blkcipher *wep_rx_tfm;
 667         u32 wep_iv;
 668
 669         /* see iface.c */
 670         struct list_head interfaces;
 671         struct mutex iflist_mtx;
 672
 673         /*
 674          * Key lock, protects sdata's key_list and sta_info's
 675          * key pointers (write access, they're RCU.)
 676          */
 677         spinlock_t key_lock;
 678
 679
 680         /* Scanning and BSS list */
 681         struct mutex scan_mtx;
 682         unsigned long scanning;
 683         struct cfg80211_ssid scan_ssid;
 684         struct cfg80211_scan_request *int_scan_req;
 685         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 686         struct ieee80211_channel *scan_channel;
 687         enum ieee80211_band hw_scan_band;
 688         int scan_channel_idx;
 689         int scan_ies_len;
 690
 691         enum mac80211_scan_state next_scan_state;
 692         struct delayed_work scan_work;
 693         struct ieee80211_sub_if_data *scan_sdata;
 694         enum nl80211_channel_type oper_channel_type;
 695         struct ieee80211_channel *oper_channel, *csa_channel;
 696
 697         /* SNMP counters */
 698         /* dot11CountersTable */
 699         u32 dot11TransmittedFragmentCount;
 700         u32 dot11MulticastTransmittedFrameCount;
 701         u32 dot11FailedCount;
 702         u32 dot11RetryCount;
 703         u32 dot11MultipleRetryCount;
 704         u32 dot11FrameDuplicateCount;
 705         u32 dot11ReceivedFragmentCount;
 706         u32 dot11MulticastReceivedFrameCount;
 707         u32 dot11TransmittedFrameCount;
 708
 709 #ifdef CONFIG_MAC80211_LEDS
 710         int tx_led_counter, rx_led_counter;
 711         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 712         char tx_led_name[32], rx_led_name[32],
 713              assoc_led_name[32], radio_led_name[32];
 714 #endif
 715
 716 #ifdef CONFIG_MAC80211_DEBUGFS
 717         struct work_struct sta_debugfs_add;
 718 #endif
 719
 720 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 721         /* TX/RX handler statistics */
 722         unsigned int tx_handlers_drop;
 723         unsigned int tx_handlers_queued;
 724         unsigned int tx_handlers_drop_unencrypted;
 725         unsigned int tx_handlers_drop_fragment;
 726         unsigned int tx_handlers_drop_wep;
 727         unsigned int tx_handlers_drop_not_assoc;
 728         unsigned int tx_handlers_drop_unauth_port;
 729         unsigned int rx_handlers_drop;
 730         unsigned int rx_handlers_queued;
 731         unsigned int rx_handlers_drop_nullfunc;
 732         unsigned int rx_handlers_drop_defrag;
 733         unsigned int rx_handlers_drop_short;
 734         unsigned int rx_handlers_drop_passive_scan;
 735         unsigned int tx_expand_skb_head;
 736         unsigned int tx_expand_skb_head_cloned;
 737         unsigned int rx_expand_skb_head;
 738         unsigned int rx_expand_skb_head2;
 739         unsigned int rx_handlers_fragments;
 740         unsigned int tx_status_drop;
 741 #define I802_DEBUG_INC(c) (c)++
 742 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 743 #define I802_DEBUG_INC(c) do { } while (0)
 744 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 745
 746
 747         int total_ps_buffered; /* total number of all buffered unicast and
 748                                 * multicast packets for power saving stations
 749                                 */
 750         int wifi_wme_noack_test;
 751         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 752
 753         bool pspolling;
 754         bool scan_ps_enabled;
 755         /*
 756          * PS can only be enabled when we have exactly one managed
 757          * interface (and monitors) in PS, this then points there.
 758          */
 759         struct ieee80211_sub_if_data *ps_sdata;
 760         struct work_struct dynamic_ps_enable_work;
 761         struct work_struct dynamic_ps_disable_work;
 762         struct timer_list dynamic_ps_timer;
 763         struct notifier_block network_latency_notifier;
 764
 765         int user_power_level; /* in dBm */
 766         int power_constr_level; /* in dBm */
 767
 768         enum ieee80211_smps_mode smps_mode;
 769
 770         struct work_struct restart_work;
 771
 772 #ifdef CONFIG_MAC80211_DEBUGFS
 773         struct local_debugfsdentries {
 774                 struct dentry *rcdir;
 775                 struct dentry *stations;
 776                 struct dentry *keys;
 777         } debugfs;
 778 #endif
 779 };
 780
 781 static inline struct ieee80211_sub_if_data *
 782 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 783 {
 784         return netdev_priv(dev);
 785 }
 786
 787 /* this struct represents 802.11n's RA/TID combination along with our vif */
 788 struct ieee80211_ra_tid {
 789         struct ieee80211_vif *vif;
 790         u8 ra[ETH_ALEN];
 791         u16 tid;
 792 };
 793
 794 /* Parsed Information Elements */
 795 struct ieee802_11_elems {
 796         u8 *ie_start;
 797         size_t total_len;
 798
 799         /* pointers to IEs */
 800         u8 *ssid;
 801         u8 *supp_rates;
 802         u8 *fh_params;
 803         u8 *ds_params;
 804         u8 *cf_params;
 805         struct ieee80211_tim_ie *tim;
 806         u8 *ibss_params;
 807         u8 *challenge;
 808         u8 *wpa;
 809         u8 *rsn;
 810         u8 *erp_info;
 811         u8 *ext_supp_rates;
 812         u8 *wmm_info;
 813         u8 *wmm_param;
 814         struct ieee80211_ht_cap *ht_cap_elem;
 815         struct ieee80211_ht_info *ht_info_elem;
 816         struct ieee80211_meshconf_ie *mesh_config;
 817         u8 *mesh_id;
 818         u8 *peer_link;
 819         u8 *preq;
 820         u8 *prep;
 821         u8 *perr;
 822         struct ieee80211_rann_ie *rann;
 823         u8 *ch_switch_elem;
 824         u8 *country_elem;
 825         u8 *pwr_constr_elem;
 826         u8 *quiet_elem;         /* first quite element */
 827         u8 *timeout_int;
 828
 829         /* length of them, respectively */
 830         u8 ssid_len;
 831         u8 supp_rates_len;
 832         u8 fh_params_len;
 833         u8 ds_params_len;
 834         u8 cf_params_len;
 835         u8 tim_len;
 836         u8 ibss_params_len;
 837         u8 challenge_len;
 838         u8 wpa_len;
 839         u8 rsn_len;
 840         u8 erp_info_len;
 841         u8 ext_supp_rates_len;
 842         u8 wmm_info_len;
 843         u8 wmm_param_len;
 844         u8 mesh_id_len;
 845         u8 peer_link_len;
 846         u8 preq_len;
 847         u8 prep_len;
 848         u8 perr_len;
 849         u8 ch_switch_elem_len;
 850         u8 country_elem_len;
 851         u8 pwr_constr_elem_len;
 852         u8 quiet_elem_len;
 853         u8 num_of_quiet_elem;   /* can be more the one */
 854         u8 timeout_int_len;
 855 };
 856
 857 static inline struct ieee80211_local *hw_to_local(
 858         struct ieee80211_hw *hw)
 859 {
 860         return container_of(hw, struct ieee80211_local, hw);
 861 }
 862
 863 static inline struct ieee80211_hw *local_to_hw(
 864         struct ieee80211_local *local)
 865 {
 866         return &local->hw;
 867 }
 868
 869
 870 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 871 {
 872         return compare_ether_addr(raddr, addr) == 0 ||
 873                is_broadcast_ether_addr(raddr);
 874 }
 875
 876
 877 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 878 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 879 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 880                                       u32 changed);
 881 void ieee80211_configure_filter(struct ieee80211_local *local);
 882 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 883
 884 extern bool ieee80211_disable_40mhz_24ghz;
 885
 886 /* STA code */
 887 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 888 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
 889                        struct cfg80211_auth_request *req);
 890 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 891                         struct cfg80211_assoc_request *req);
 892 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 893                          struct cfg80211_deauth_request *req,
 894                          void *cookie);
 895 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
 896                            struct cfg80211_disassoc_request *req,
 897                            void *cookie);
 898 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 899                                           struct sk_buff *skb);
 900 void ieee80211_send_pspoll(struct ieee80211_local *local,
 901                            struct ieee80211_sub_if_data *sdata);
 902 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 903 int ieee80211_max_network_latency(struct notifier_block *nb,
 904                                   unsigned long data, void *dummy);
 905 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 906                                       struct ieee80211_channel_sw_ie *sw_elem,
 907                                       struct ieee80211_bss *bss);
 908 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 909 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 910
 911 /* IBSS code */
 912 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 913 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 914 ieee80211_rx_result
 915 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 916 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 917                                         u8 *bssid, u8 *addr, u32 supp_rates);
 918 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 919                         struct cfg80211_ibss_params *params);
 920 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 921 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 922 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 923
 924 /* scan/BSS handling */
 925 void ieee80211_scan_work(struct work_struct *work);
 926 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 927                                     const u8 *ssid, u8 ssid_len);
 928 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 929                            struct cfg80211_scan_request *req);
 930 void ieee80211_scan_cancel(struct ieee80211_local *local);
 931 ieee80211_rx_result
 932 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 933
 934 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 935 struct ieee80211_bss *
 936 ieee80211_bss_info_update(struct ieee80211_local *local,
 937                           struct ieee80211_rx_status *rx_status,
 938                           struct ieee80211_mgmt *mgmt,
 939                           size_t len,
 940                           struct ieee802_11_elems *elems,
 941                           struct ieee80211_channel *channel,
 942                           bool beacon);
 943 struct ieee80211_bss *
 944 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 945                      u8 *ssid, u8 ssid_len);
 946 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 947                           struct ieee80211_bss *bss);
 948
 949 /* interface handling */
 950 int ieee80211_iface_init(void);
 951 void ieee80211_iface_exit(void);
 952 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 953                      struct net_device **new_dev, enum nl80211_iftype type,
 954                      struct vif_params *params);
 955 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 956                              enum nl80211_iftype type);
 957 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 958 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 959 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
 960 void ieee80211_recalc_idle(struct ieee80211_local *local);
 961
 962 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
 963 {
 964         return netif_running(sdata->dev);
 965 }
 966
 967 /* tx handling */
 968 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 969 void ieee80211_tx_pending(unsigned long data);
 970 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 971                                          struct net_device *dev);
 972 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 973                                        struct net_device *dev);
 974
 975 /*
 976  * radiotap header for status frames
 977  */
 978 struct ieee80211_tx_status_rtap_hdr {
 979         struct ieee80211_radiotap_header hdr;
 980         u8 rate;
 981         u8 padding_for_rate;
 982         __le16 tx_flags;
 983         u8 data_retries;
 984 } __attribute__ ((packed));
 985
 986
 987 /* HT */
 988 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 989                                        struct ieee80211_ht_cap *ht_cap_ie,
 990                                        struct ieee80211_sta_ht_cap *ht_cap);
 991 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 992 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
 993                           const u8 *da, u16 tid,
 994                           u16 initiator, u16 reason_code);
 995 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
 996                                enum ieee80211_smps_mode smps, const u8 *da,
 997                                const u8 *bssid);
 998
 999 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
1000                                 u16 tid, u16 initiator, u16 reason);
1001 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1002                                     u16 initiator, u16 reason);
1003 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1004 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1005                              struct sta_info *sta,
1006                              struct ieee80211_mgmt *mgmt, size_t len);
1007 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1008                                   struct sta_info *sta,
1009                                   struct ieee80211_mgmt *mgmt,
1010                                   size_t len);
1011 void ieee80211_process_addba_request(struct ieee80211_local *local,
1012                                      struct sta_info *sta,
1013                                      struct ieee80211_mgmt *mgmt,
1014                                      size_t len);
1015
1016 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1017                                    enum ieee80211_back_parties initiator);
1018 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1019                                     enum ieee80211_back_parties initiator);
1020
1021 /* Spectrum management */
1022 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1023                                        struct ieee80211_mgmt *mgmt,
1024                                        size_t len);
1025
1026 /* Suspend/resume and hw reconfiguration */
1027 int ieee80211_reconfig(struct ieee80211_local *local);
1028 void ieee80211_stop_device(struct ieee80211_local *local);
1029
1030 #ifdef CONFIG_PM
1031 int __ieee80211_suspend(struct ieee80211_hw *hw);
1032
1033 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1034 {
1035         return ieee80211_reconfig(hw_to_local(hw));
1036 }
1037 #else
1038 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1039 {
1040         return 0;
1041 }
1042
1043 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1044 {
1045         return 0;
1046 }
1047 #endif
1048
1049 /* utility functions/constants */
1050 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1051 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1052                         enum nl80211_iftype type);
1053 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1054                              int rate, int erp, int short_preamble);
1055 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1056                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1057                                      gfp_t gfp);
1058 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1059 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1060 void ieee802_11_parse_elems(u8 *start, size_t len,
1061                             struct ieee802_11_elems *elems);
1062 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1063                                struct ieee802_11_elems *elems,
1064                                u64 filter, u32 crc);
1065 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1066                               enum ieee80211_band band);
1067
1068 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1069 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1070 void ieee80211_dynamic_ps_timer(unsigned long data);
1071 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1072                              struct ieee80211_sub_if_data *sdata,
1073                              int powersave);
1074 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1075                              struct ieee80211_hdr *hdr);
1076 void ieee80211_beacon_loss_work(struct work_struct *work);
1077
1078 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1079                                      enum queue_stop_reason reason);
1080 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1081                                      enum queue_stop_reason reason);
1082 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1083                                     enum queue_stop_reason reason);
1084 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1085                                     enum queue_stop_reason reason);
1086 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1087                                struct sk_buff *skb);
1088 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1089                                struct sk_buff_head *skbs);
1090
1091 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1092                          u16 transaction, u16 auth_alg,
1093                          u8 *extra, size_t extra_len, const u8 *bssid,
1094                          const u8 *key, u8 key_len, u8 key_idx);
1095 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1096                              const u8 *ie, size_t ie_len,
1097                              enum ieee80211_band band);
1098 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1099                               const u8 *ssid, size_t ssid_len,
1100                               const u8 *ie, size_t ie_len);
1101
1102 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1103                                   const size_t supp_rates_len,
1104                                   const u8 *supp_rates);
1105 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1106                             struct ieee802_11_elems *elems,
1107                             enum ieee80211_band band);
1108 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1109                              enum ieee80211_smps_mode smps_mode);
1110 void ieee80211_recalc_smps(struct ieee80211_local *local,
1111                            struct ieee80211_sub_if_data *forsdata);
1112
1113 #ifdef CONFIG_MAC80211_NOINLINE
1114 #define debug_noinline noinline
1115 #else
1116 #define debug_noinline
1117 #endif
1118
1119 #endif /* IEEE80211_I_H */