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/cfg80211.h>
  27 #include <net/mac80211.h>
  28 #include "key.h"
  29 #include "sta_info.h"
  30
  31 struct ieee80211_local;
  32
  33 /* Maximum number of broadcast/multicast frames to buffer when some of the
  34  * associated stations are using power saving. */
  35 #define AP_MAX_BC_BUFFER 128
  36
  37 /* Maximum number of frames buffered to all STAs, including multicast frames.
  38  * Note: increasing this limit increases the potential memory requirement. Each
  39  * frame can be up to about 2 kB long. */
  40 #define TOTAL_MAX_TX_BUFFER 512
  41
  42 /* Required encryption head and tailroom */
  43 #define IEEE80211_ENCRYPT_HEADROOM 8
  44 #define IEEE80211_ENCRYPT_TAILROOM 18
  45
  46 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  47  * reception of at least three fragmented frames. This limit can be increased
  48  * by changing this define, at the cost of slower frame reassembly and
  49  * increased memory use (about 2 kB of RAM per entry). */
  50 #define IEEE80211_FRAGMENT_MAX 4
  51
  52 /*
  53  * Time after which we ignore scan results and no longer report/use
  54  * them in any way.
  55  */
  56 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  57
  58 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  59
  60 struct ieee80211_fragment_entry {
  61         unsigned long first_frag_time;
  62         unsigned int seq;
  63         unsigned int rx_queue;
  64         unsigned int last_frag;
  65         unsigned int extra_len;
  66         struct sk_buff_head skb_list;
  67         int ccmp; /* Whether fragments were encrypted with CCMP */
  68         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  69 };
  70
  71
  72 struct ieee80211_bss {
  73         /* Yes, this is a hack */
  74         struct cfg80211_bss cbss;
  75
  76         /* don't want to look up all the time */
  77         size_t ssid_len;
  78         u8 ssid[IEEE80211_MAX_SSID_LEN];
  79
  80         u8 dtim_period;
  81
  82         bool wmm_used;
  83
  84         unsigned long last_probe_resp;
  85
  86 #ifdef CONFIG_MAC80211_MESH
  87         u8 *mesh_id;
  88         size_t mesh_id_len;
  89         u8 *mesh_cfg;
  90 #endif
  91
  92 #define IEEE80211_MAX_SUPP_RATES 32
  93         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  94         size_t supp_rates_len;
  95
  96         /*
  97          * During assocation, we save an ERP value from a probe response so
  98          * that we can feed ERP info to the driver when handling the
  99          * association completes. these fields probably won't be up-to-date
 100          * otherwise, you probably don't want to use them.
 101          */
 102         bool has_erp_value;
 103         u8 erp_value;
 104 };
 105
 106 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 107 {
 108 #ifdef CONFIG_MAC80211_MESH
 109         return bss->mesh_cfg;
 110 #endif
 111         return NULL;
 112 }
 113
 114 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 115 {
 116 #ifdef CONFIG_MAC80211_MESH
 117         return bss->mesh_id;
 118 #endif
 119         return NULL;
 120 }
 121
 122 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 123 {
 124 #ifdef CONFIG_MAC80211_MESH
 125         return bss->mesh_id_len;
 126 #endif
 127         return 0;
 128 }
 129
 130
 131 typedef unsigned __bitwise__ ieee80211_tx_result;
 132 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 133 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 134 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 135
 136 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 137 #define IEEE80211_TX_UNICAST            BIT(1)
 138 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 139
 140 struct ieee80211_tx_data {
 141         struct sk_buff *skb;
 142         struct net_device *dev;
 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_CMNTR_REPORTED     BIT(3)
 166 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 167
 168 struct ieee80211_rx_data {
 169         struct sk_buff *skb;
 170         struct net_device *dev;
 171         struct ieee80211_local *local;
 172         struct ieee80211_sub_if_data *sdata;
 173         struct sta_info *sta;
 174         struct ieee80211_key *key;
 175         struct ieee80211_rx_status *status;
 176         struct ieee80211_rate *rate;
 177
 178         unsigned int flags;
 179         int queue;
 180         u32 tkip_iv32;
 181         u16 tkip_iv16;
 182 };
 183
 184 struct beacon_data {
 185         u8 *head, *tail;
 186         int head_len, tail_len;
 187         int dtim_period;
 188 };
 189
 190 struct ieee80211_if_ap {
 191         struct beacon_data *beacon;
 192
 193         struct list_head vlans;
 194
 195         /* yes, this looks ugly, but guarantees that we can later use
 196          * bitmap_empty :)
 197          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 198         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 199         struct sk_buff_head ps_bc_buf;
 200         atomic_t num_sta_ps; /* number of stations in PS mode */
 201         int dtim_count;
 202 };
 203
 204 struct ieee80211_if_wds {
 205         struct sta_info *sta;
 206         u8 remote_addr[ETH_ALEN];
 207 };
 208
 209 struct ieee80211_if_vlan {
 210         struct list_head list;
 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_IDLE,
 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 ieee80211_mgd_work *old_associate_work;
 289         struct list_head work_list;
 290
 291         u8 bssid[ETH_ALEN];
 292
 293         u16 aid;
 294         u16 capab;
 295
 296         struct sk_buff_head skb_queue;
 297
 298         unsigned long timers_running; /* used for quiesce/restart */
 299         bool powersave; /* powersave requested for this iface */
 300
 301         unsigned long request;
 302
 303         unsigned int flags;
 304
 305         u32 beacon_crc;
 306
 307         enum {
 308                 IEEE80211_MFP_DISABLED,
 309                 IEEE80211_MFP_OPTIONAL,
 310                 IEEE80211_MFP_REQUIRED
 311         } mfp; /* management frame protection */
 312
 313         int wmm_last_param_set;
 314 };
 315
 316 enum ieee80211_ibss_request {
 317         IEEE80211_IBSS_REQ_RUN  = 0,
 318 };
 319
 320 struct ieee80211_if_ibss {
 321         struct timer_list timer;
 322         struct work_struct work;
 323
 324         struct sk_buff_head skb_queue;
 325
 326         unsigned long request;
 327         unsigned long last_scan_completed;
 328
 329         bool timer_running;
 330
 331         bool fixed_bssid;
 332         bool fixed_channel;
 333         bool privacy;
 334
 335         u8 bssid[ETH_ALEN];
 336         u8 ssid[IEEE80211_MAX_SSID_LEN];
 337         u8 ssid_len, ie_len;
 338         u8 *ie;
 339         struct ieee80211_channel *channel;
 340
 341         unsigned long ibss_join_req;
 342         /* probe response/beacon for IBSS */
 343         struct sk_buff *presp, *skb;
 344
 345         enum {
 346                 IEEE80211_IBSS_MLME_SEARCH,
 347                 IEEE80211_IBSS_MLME_JOINED,
 348         } state;
 349 };
 350
 351 struct ieee80211_if_mesh {
 352         struct work_struct work;
 353         struct timer_list housekeeping_timer;
 354         struct timer_list mesh_path_timer;
 355         struct sk_buff_head skb_queue;
 356
 357         unsigned long timers_running;
 358
 359         unsigned long wrkq_flags;
 360
 361         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 362         size_t mesh_id_len;
 363         /* Active Path Selection Protocol Identifier */
 364         u8 mesh_pp_id[4];
 365         /* Active Path Selection Metric Identifier */
 366         u8 mesh_pm_id[4];
 367         /* Congestion Control Mode Identifier */
 368         u8 mesh_cc_id[4];
 369         /* Synchronization Protocol Identifier */
 370         u8 mesh_sp_id[4];
 371         /* Authentication Protocol Identifier */
 372         u8 mesh_auth_id[4];
 373         /* Local mesh Destination Sequence Number */
 374         u32 dsn;
 375         /* Last used PREQ ID */
 376         u32 preq_id;
 377         atomic_t mpaths;
 378         /* Timestamp of last DSN update */
 379         unsigned long last_dsn_update;
 380         /* Timestamp of last DSN sent */
 381         unsigned long last_preq;
 382         struct mesh_rmc *rmc;
 383         spinlock_t mesh_preq_queue_lock;
 384         struct mesh_preq_queue preq_queue;
 385         int preq_queue_len;
 386         struct mesh_stats mshstats;
 387         struct mesh_config mshcfg;
 388         u32 mesh_seqnum;
 389         bool accepting_plinks;
 390 };
 391
 392 #ifdef CONFIG_MAC80211_MESH
 393 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 394         do { (msh)->mshstats.name++; } while (0)
 395 #else
 396 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 397         do { } while (0)
 398 #endif
 399
 400 /**
 401  * enum ieee80211_sub_if_data_flags - virtual interface flags
 402  *
 403  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 404  * @IEEE80211_SDATA_PROMISC: interface is promisc
 405  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 406  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 407  *      associated stations and deliver multicast frames both
 408  *      back to wireless media and to the local net stack.
 409  */
 410 enum ieee80211_sub_if_data_flags {
 411         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 412         IEEE80211_SDATA_PROMISC                 = BIT(1),
 413         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 414         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 415 };
 416
 417 struct ieee80211_sub_if_data {
 418         struct list_head list;
 419
 420         struct wireless_dev wdev;
 421
 422         /* keys */
 423         struct list_head key_list;
 424
 425         struct net_device *dev;
 426         struct ieee80211_local *local;
 427
 428         unsigned int flags;
 429
 430         int drop_unencrypted;
 431
 432         /*
 433          * keep track of whether the HT opmode (stored in
 434          * vif.bss_info.ht_operation_mode) is valid.
 435          */
 436         bool ht_opmode_valid;
 437
 438         /* Fragment table for host-based reassembly */
 439         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 440         unsigned int fragment_next;
 441
 442 #define NUM_DEFAULT_KEYS 4
 443 #define NUM_DEFAULT_MGMT_KEYS 2
 444         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 445         struct ieee80211_key *default_key;
 446         struct ieee80211_key *default_mgmt_key;
 447
 448         u16 sequence_number;
 449
 450         /*
 451          * AP this belongs to: self in AP mode and
 452          * corresponding AP in VLAN mode, NULL for
 453          * all others (might be needed later in IBSS)
 454          */
 455         struct ieee80211_if_ap *bss;
 456
 457         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 458         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 459
 460         union {
 461                 struct ieee80211_if_ap ap;
 462                 struct ieee80211_if_wds wds;
 463                 struct ieee80211_if_vlan vlan;
 464                 struct ieee80211_if_managed mgd;
 465                 struct ieee80211_if_ibss ibss;
 466 #ifdef CONFIG_MAC80211_MESH
 467                 struct ieee80211_if_mesh mesh;
 468 #endif
 469                 u32 mntr_flags;
 470         } u;
 471
 472 #ifdef CONFIG_MAC80211_DEBUGFS
 473         struct {
 474                 struct dentry *dir;
 475                 struct dentry *default_key;
 476                 struct dentry *default_mgmt_key;
 477         } debugfs;
 478 #endif
 479         /* must be last, dynamically sized area in this! */
 480         struct ieee80211_vif vif;
 481 };
 482
 483 static inline
 484 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 485 {
 486         return container_of(p, struct ieee80211_sub_if_data, vif);
 487 }
 488
 489 static inline void
 490 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 491                             u8 mesh_id_len, u8 *mesh_id)
 492 {
 493 #ifdef CONFIG_MAC80211_MESH
 494         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 495         ifmsh->mesh_id_len = mesh_id_len;
 496         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 497 #else
 498         WARN_ON(1);
 499 #endif
 500 }
 501
 502 enum {
 503         IEEE80211_RX_MSG        = 1,
 504         IEEE80211_TX_STATUS_MSG = 2,
 505         IEEE80211_DELBA_MSG     = 3,
 506         IEEE80211_ADDBA_MSG     = 4,
 507 };
 508
 509 enum queue_stop_reason {
 510         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 511         IEEE80211_QUEUE_STOP_REASON_PS,
 512         IEEE80211_QUEUE_STOP_REASON_CSA,
 513         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 514         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 515         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 516 };
 517
 518 /**
 519  * mac80211 scan flags - currently active scan mode
 520  *
 521  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 522  *      well be on the operating channel
 523  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 524  *      determine if we are on the operating channel or not
 525  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 526  *      gets only set in conjunction with SCAN_SW_SCANNING
 527  */
 528 enum {
 529         SCAN_SW_SCANNING,
 530         SCAN_HW_SCANNING,
 531         SCAN_OFF_CHANNEL,
 532 };
 533
 534 /**
 535  * enum mac80211_scan_state - scan state machine states
 536  *
 537  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 538  *      determines if we should keep on scanning or switch back to the
 539  *      operating channel
 540  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 541  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 542  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 543  *      about us leaving the channel and stop all associated STA interfaces
 544  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 545  *      AP about us being back and restart all associated STA interfaces
 546  */
 547 enum mac80211_scan_state {
 548         SCAN_DECISION,
 549         SCAN_SET_CHANNEL,
 550         SCAN_SEND_PROBE,
 551         SCAN_LEAVE_OPER_CHANNEL,
 552         SCAN_ENTER_OPER_CHANNEL,
 553 };
 554
 555 struct ieee80211_local {
 556         /* embed the driver visible part.
 557          * don't cast (use the static inlines below), but we keep
 558          * it first anyway so they become a no-op */
 559         struct ieee80211_hw hw;
 560
 561         const struct ieee80211_ops *ops;
 562
 563         /*
 564          * private workqueue to mac80211. mac80211 makes this accessible
 565          * via ieee80211_queue_work()
 566          */
 567         struct workqueue_struct *workqueue;
 568
 569         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 570         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 571         spinlock_t queue_stop_reason_lock;
 572
 573         int open_count;
 574         int monitors, cooked_mntrs;
 575         /* number of interfaces with corresponding FIF_ flags */
 576         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
 577         unsigned int filter_flags; /* FIF_* */
 578         struct iw_statistics wstats;
 579
 580         /* protects the aggregated multicast list and filter calls */
 581         spinlock_t filter_lock;
 582
 583         /* used for uploading changed mc list */
 584         struct work_struct reconfig_filter;
 585
 586         /* aggregated multicast list */
 587         struct dev_addr_list *mc_list;
 588         int mc_count;
 589
 590         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 591
 592         /*
 593          * suspended is true if we finished all the suspend _and_ we have
 594          * not yet come up from resume. This is to be used by mac80211
 595          * to ensure driver sanity during suspend and mac80211's own
 596          * sanity. It can eventually be used for WoW as well.
 597          */
 598         bool suspended;
 599
 600         /*
 601          * quiescing is true during the suspend process _only_ to
 602          * ease timer cancelling etc.
 603          */
 604         bool quiescing;
 605
 606         /* device is started */
 607         bool started;
 608
 609         int tx_headroom; /* required headroom for hardware/radiotap */
 610
 611         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 612          * added to skb_queue will be processed, but frames in
 613          * skb_queue_unreliable may be dropped if the total length of these
 614          * queues increases over the limit. */
 615 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 616         struct tasklet_struct tasklet;
 617         struct sk_buff_head skb_queue;
 618         struct sk_buff_head skb_queue_unreliable;
 619
 620         /* Station data */
 621         /*
 622          * The lock only protects the list, hash, timer and counter
 623          * against manipulation, reads are done in RCU. Additionally,
 624          * the lock protects each BSS's TIM bitmap.
 625          */
 626         spinlock_t sta_lock;
 627         unsigned long num_sta;
 628         struct list_head sta_list;
 629         struct sta_info *sta_hash[STA_HASH_SIZE];
 630         struct timer_list sta_cleanup;
 631         int sta_generation;
 632
 633         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 634         struct tasklet_struct tx_pending_tasklet;
 635
 636         /*
 637          * This lock is used to prevent concurrent A-MPDU
 638          * session start/stop processing, this thus also
 639          * synchronises the ->ampdu_action() callback to
 640          * drivers and limits it to one at a time.
 641          */
 642         spinlock_t ampdu_lock;
 643
 644         /* number of interfaces with corresponding IFF_ flags */
 645         atomic_t iff_allmultis, iff_promiscs;
 646
 647         struct rate_control_ref *rate_ctrl;
 648
 649         struct crypto_blkcipher *wep_tx_tfm;
 650         struct crypto_blkcipher *wep_rx_tfm;
 651         u32 wep_iv;
 652
 653         /* see iface.c */
 654         struct list_head interfaces;
 655         struct mutex iflist_mtx;
 656
 657         /*
 658          * Key lock, protects sdata's key_list and sta_info's
 659          * key pointers (write access, they're RCU.)
 660          */
 661         spinlock_t key_lock;
 662
 663
 664         /* Scanning and BSS list */
 665         struct mutex scan_mtx;
 666         unsigned long scanning;
 667         struct cfg80211_ssid scan_ssid;
 668         struct cfg80211_scan_request *int_scan_req;
 669         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 670         struct ieee80211_channel *scan_channel;
 671         enum ieee80211_band hw_scan_band;
 672         int scan_channel_idx;
 673         int scan_ies_len;
 674
 675         enum mac80211_scan_state next_scan_state;
 676         struct delayed_work scan_work;
 677         struct ieee80211_sub_if_data *scan_sdata;
 678         enum nl80211_channel_type oper_channel_type;
 679         struct ieee80211_channel *oper_channel, *csa_channel;
 680
 681         /* SNMP counters */
 682         /* dot11CountersTable */
 683         u32 dot11TransmittedFragmentCount;
 684         u32 dot11MulticastTransmittedFrameCount;
 685         u32 dot11FailedCount;
 686         u32 dot11RetryCount;
 687         u32 dot11MultipleRetryCount;
 688         u32 dot11FrameDuplicateCount;
 689         u32 dot11ReceivedFragmentCount;
 690         u32 dot11MulticastReceivedFrameCount;
 691         u32 dot11TransmittedFrameCount;
 692
 693 #ifdef CONFIG_MAC80211_LEDS
 694         int tx_led_counter, rx_led_counter;
 695         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 696         char tx_led_name[32], rx_led_name[32],
 697              assoc_led_name[32], radio_led_name[32];
 698 #endif
 699
 700 #ifdef CONFIG_MAC80211_DEBUGFS
 701         struct work_struct sta_debugfs_add;
 702 #endif
 703
 704 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 705         /* TX/RX handler statistics */
 706         unsigned int tx_handlers_drop;
 707         unsigned int tx_handlers_queued;
 708         unsigned int tx_handlers_drop_unencrypted;
 709         unsigned int tx_handlers_drop_fragment;
 710         unsigned int tx_handlers_drop_wep;
 711         unsigned int tx_handlers_drop_not_assoc;
 712         unsigned int tx_handlers_drop_unauth_port;
 713         unsigned int rx_handlers_drop;
 714         unsigned int rx_handlers_queued;
 715         unsigned int rx_handlers_drop_nullfunc;
 716         unsigned int rx_handlers_drop_defrag;
 717         unsigned int rx_handlers_drop_short;
 718         unsigned int rx_handlers_drop_passive_scan;
 719         unsigned int tx_expand_skb_head;
 720         unsigned int tx_expand_skb_head_cloned;
 721         unsigned int rx_expand_skb_head;
 722         unsigned int rx_expand_skb_head2;
 723         unsigned int rx_handlers_fragments;
 724         unsigned int tx_status_drop;
 725 #define I802_DEBUG_INC(c) (c)++
 726 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 727 #define I802_DEBUG_INC(c) do { } while (0)
 728 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 729
 730
 731         int total_ps_buffered; /* total number of all buffered unicast and
 732                                 * multicast packets for power saving stations
 733                                 */
 734         int wifi_wme_noack_test;
 735         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 736
 737         bool pspolling;
 738         /*
 739          * PS can only be enabled when we have exactly one managed
 740          * interface (and monitors) in PS, this then points there.
 741          */
 742         struct ieee80211_sub_if_data *ps_sdata;
 743         struct work_struct dynamic_ps_enable_work;
 744         struct work_struct dynamic_ps_disable_work;
 745         struct timer_list dynamic_ps_timer;
 746         struct notifier_block network_latency_notifier;
 747
 748         int user_power_level; /* in dBm */
 749         int power_constr_level; /* in dBm */
 750
 751         struct work_struct restart_work;
 752
 753 #ifdef CONFIG_MAC80211_DEBUGFS
 754         struct local_debugfsdentries {
 755                 struct dentry *rcdir;
 756                 struct dentry *stations;
 757                 struct dentry *keys;
 758         } debugfs;
 759 #endif
 760 };
 761
 762 static inline struct ieee80211_sub_if_data *
 763 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 764 {
 765         return netdev_priv(dev);
 766 }
 767
 768 /* this struct represents 802.11n's RA/TID combination */
 769 struct ieee80211_ra_tid {
 770         u8 ra[ETH_ALEN];
 771         u16 tid;
 772 };
 773
 774 /* Parsed Information Elements */
 775 struct ieee802_11_elems {
 776         u8 *ie_start;
 777         size_t total_len;
 778
 779         /* pointers to IEs */
 780         u8 *ssid;
 781         u8 *supp_rates;
 782         u8 *fh_params;
 783         u8 *ds_params;
 784         u8 *cf_params;
 785         struct ieee80211_tim_ie *tim;
 786         u8 *ibss_params;
 787         u8 *challenge;
 788         u8 *wpa;
 789         u8 *rsn;
 790         u8 *erp_info;
 791         u8 *ext_supp_rates;
 792         u8 *wmm_info;
 793         u8 *wmm_param;
 794         struct ieee80211_ht_cap *ht_cap_elem;
 795         struct ieee80211_ht_info *ht_info_elem;
 796         u8 *mesh_config;
 797         u8 *mesh_id;
 798         u8 *peer_link;
 799         u8 *preq;
 800         u8 *prep;
 801         u8 *perr;
 802         u8 *ch_switch_elem;
 803         u8 *country_elem;
 804         u8 *pwr_constr_elem;
 805         u8 *quiet_elem;         /* first quite element */
 806         u8 *timeout_int;
 807
 808         /* length of them, respectively */
 809         u8 ssid_len;
 810         u8 supp_rates_len;
 811         u8 fh_params_len;
 812         u8 ds_params_len;
 813         u8 cf_params_len;
 814         u8 tim_len;
 815         u8 ibss_params_len;
 816         u8 challenge_len;
 817         u8 wpa_len;
 818         u8 rsn_len;
 819         u8 erp_info_len;
 820         u8 ext_supp_rates_len;
 821         u8 wmm_info_len;
 822         u8 wmm_param_len;
 823         u8 mesh_config_len;
 824         u8 mesh_id_len;
 825         u8 peer_link_len;
 826         u8 preq_len;
 827         u8 prep_len;
 828         u8 perr_len;
 829         u8 ch_switch_elem_len;
 830         u8 country_elem_len;
 831         u8 pwr_constr_elem_len;
 832         u8 quiet_elem_len;
 833         u8 num_of_quiet_elem;   /* can be more the one */
 834         u8 timeout_int_len;
 835 };
 836
 837 static inline struct ieee80211_local *hw_to_local(
 838         struct ieee80211_hw *hw)
 839 {
 840         return container_of(hw, struct ieee80211_local, hw);
 841 }
 842
 843 static inline struct ieee80211_hw *local_to_hw(
 844         struct ieee80211_local *local)
 845 {
 846         return &local->hw;
 847 }
 848
 849
 850 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 851 {
 852         return compare_ether_addr(raddr, addr) == 0 ||
 853                is_broadcast_ether_addr(raddr);
 854 }
 855
 856
 857 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 858 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 859 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 860                                       u32 changed);
 861 void ieee80211_configure_filter(struct ieee80211_local *local);
 862 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 863
 864 /* STA code */
 865 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 866 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
 867                        struct cfg80211_auth_request *req);
 868 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 869                         struct cfg80211_assoc_request *req);
 870 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 871                          struct cfg80211_deauth_request *req,
 872                          void *cookie);
 873 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
 874                            struct cfg80211_disassoc_request *req,
 875                            void *cookie);
 876 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 877                                           struct sk_buff *skb);
 878 void ieee80211_send_pspoll(struct ieee80211_local *local,
 879                            struct ieee80211_sub_if_data *sdata);
 880 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 881 int ieee80211_max_network_latency(struct notifier_block *nb,
 882                                   unsigned long data, void *dummy);
 883 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 884                                       struct ieee80211_channel_sw_ie *sw_elem,
 885                                       struct ieee80211_bss *bss);
 886 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 887 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 888
 889 /* IBSS code */
 890 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 891 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 892 ieee80211_rx_result
 893 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 894 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 895                                         u8 *bssid, u8 *addr, u32 supp_rates);
 896 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 897                         struct cfg80211_ibss_params *params);
 898 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 899 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 900 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 901
 902 /* scan/BSS handling */
 903 void ieee80211_scan_work(struct work_struct *work);
 904 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 905                                     const u8 *ssid, u8 ssid_len);
 906 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 907                            struct cfg80211_scan_request *req);
 908 void ieee80211_scan_cancel(struct ieee80211_local *local);
 909 ieee80211_rx_result
 910 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 911
 912 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 913 struct ieee80211_bss *
 914 ieee80211_bss_info_update(struct ieee80211_local *local,
 915                           struct ieee80211_rx_status *rx_status,
 916                           struct ieee80211_mgmt *mgmt,
 917                           size_t len,
 918                           struct ieee802_11_elems *elems,
 919                           struct ieee80211_channel *channel,
 920                           bool beacon);
 921 struct ieee80211_bss *
 922 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 923                      u8 *ssid, u8 ssid_len);
 924 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 925                           struct ieee80211_bss *bss);
 926
 927 /* interface handling */
 928 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 929                      struct net_device **new_dev, enum nl80211_iftype type,
 930                      struct vif_params *params);
 931 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 932                              enum nl80211_iftype type);
 933 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 934 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 935 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
 936 void ieee80211_recalc_idle(struct ieee80211_local *local);
 937
 938 /* tx handling */
 939 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 940 void ieee80211_tx_pending(unsigned long data);
 941 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 942                                          struct net_device *dev);
 943 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 944                                        struct net_device *dev);
 945
 946 /* HT */
 947 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 948                                        struct ieee80211_ht_cap *ht_cap_ie,
 949                                        struct ieee80211_sta_ht_cap *ht_cap);
 950 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 951 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
 952                           const u8 *da, u16 tid,
 953                           u16 initiator, u16 reason_code);
 954
 955 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 956                                 u16 tid, u16 initiator, u16 reason);
 957 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 958                                     u16 initiator, u16 reason);
 959 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
 960 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 961                              struct sta_info *sta,
 962                              struct ieee80211_mgmt *mgmt, size_t len);
 963 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 964                                   struct sta_info *sta,
 965                                   struct ieee80211_mgmt *mgmt,
 966                                   size_t len);
 967 void ieee80211_process_addba_request(struct ieee80211_local *local,
 968                                      struct sta_info *sta,
 969                                      struct ieee80211_mgmt *mgmt,
 970                                      size_t len);
 971
 972 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 973                                    enum ieee80211_back_parties initiator);
 974
 975 /* Spectrum management */
 976 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
 977                                        struct ieee80211_mgmt *mgmt,
 978                                        size_t len);
 979
 980 /* Suspend/resume and hw reconfiguration */
 981 int ieee80211_reconfig(struct ieee80211_local *local);
 982 void ieee80211_stop_device(struct ieee80211_local *local);
 983
 984 #ifdef CONFIG_PM
 985 int __ieee80211_suspend(struct ieee80211_hw *hw);
 986
 987 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
 988 {
 989         return ieee80211_reconfig(hw_to_local(hw));
 990 }
 991 #else
 992 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
 993 {
 994         return 0;
 995 }
 996
 997 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
 998 {
 999         return 0;
1000 }
1001 #endif
1002
1003 /* utility functions/constants */
1004 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1005 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1006                         enum nl80211_iftype type);
1007 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1008                              int rate, int erp, int short_preamble);
1009 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1010                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1011                                      gfp_t gfp);
1012 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1013 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1014                       int encrypt);
1015 void ieee802_11_parse_elems(u8 *start, size_t len,
1016                             struct ieee802_11_elems *elems);
1017 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1018                                struct ieee802_11_elems *elems,
1019                                u64 filter, u32 crc);
1020 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1021                               enum ieee80211_band band);
1022
1023 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1024 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1025 void ieee80211_dynamic_ps_timer(unsigned long data);
1026 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1027                              struct ieee80211_sub_if_data *sdata,
1028                              int powersave);
1029 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1030                              struct ieee80211_hdr *hdr);
1031 void ieee80211_beacon_loss_work(struct work_struct *work);
1032
1033 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1034                                      enum queue_stop_reason reason);
1035 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1036                                      enum queue_stop_reason reason);
1037 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1038                                     enum queue_stop_reason reason);
1039 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1040                                     enum queue_stop_reason reason);
1041 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1042                                struct sk_buff *skb);
1043 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1044                                struct sk_buff_head *skbs);
1045
1046 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1047                          u16 transaction, u16 auth_alg,
1048                          u8 *extra, size_t extra_len, const u8 *bssid,
1049                          const u8 *key, u8 key_len, u8 key_idx);
1050 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1051                              const u8 *ie, size_t ie_len,
1052                              enum ieee80211_band band);
1053 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1054                               const u8 *ssid, size_t ssid_len,
1055                               const u8 *ie, size_t ie_len);
1056
1057 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1058                                   const size_t supp_rates_len,
1059                                   const u8 *supp_rates);
1060 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1061                             struct ieee802_11_elems *elems,
1062                             enum ieee80211_band band);
1063
1064 #ifdef CONFIG_MAC80211_NOINLINE
1065 #define debug_noinline noinline
1066 #else
1067 #define debug_noinline
1068 #endif
1069
1070 #endif /* IEEE80211_I_H */