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         /* used for all tx if the VLAN is configured to 4-addr mode */
 213         struct sta_info *sta;
 214 };
 215
 216 struct mesh_stats {
 217         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 218         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 219         __u32 fwded_frames;             /* Mesh total forwarded frames */
 220         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 221         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 222         atomic_t estab_plinks;
 223 };
 224
 225 #define PREQ_Q_F_START          0x1
 226 #define PREQ_Q_F_REFRESH        0x2
 227 struct mesh_preq_queue {
 228         struct list_head list;
 229         u8 dst[ETH_ALEN];
 230         u8 flags;
 231 };
 232
 233 enum ieee80211_mgd_state {
 234         IEEE80211_MGD_STATE_IDLE,
 235         IEEE80211_MGD_STATE_PROBE,
 236         IEEE80211_MGD_STATE_AUTH,
 237         IEEE80211_MGD_STATE_ASSOC,
 238 };
 239
 240 struct ieee80211_mgd_work {
 241         struct list_head list;
 242         struct ieee80211_bss *bss;
 243         int ie_len;
 244         u8 prev_bssid[ETH_ALEN];
 245         u8 ssid[IEEE80211_MAX_SSID_LEN];
 246         u8 ssid_len;
 247         unsigned long timeout;
 248         enum ieee80211_mgd_state state;
 249         u16 auth_alg, auth_transaction;
 250
 251         int tries;
 252
 253         u8 key[WLAN_KEY_LEN_WEP104];
 254         u8 key_len, key_idx;
 255
 256         /* must be last */
 257         u8 ie[0]; /* for auth or assoc frame, not probe */
 258 };
 259
 260 /* flags used in struct ieee80211_if_managed.flags */
 261 enum ieee80211_sta_flags {
 262         IEEE80211_STA_BEACON_POLL       = BIT(0),
 263         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 264         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 265         IEEE80211_STA_WMM_ENABLED       = BIT(3),
 266         IEEE80211_STA_DISABLE_11N       = BIT(4),
 267         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 268         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 269 };
 270
 271 /* flags for MLME request */
 272 enum ieee80211_sta_request {
 273         IEEE80211_STA_REQ_SCAN,
 274 };
 275
 276 struct ieee80211_if_managed {
 277         struct timer_list timer;
 278         struct timer_list conn_mon_timer;
 279         struct timer_list bcn_mon_timer;
 280         struct timer_list chswitch_timer;
 281         struct work_struct work;
 282         struct work_struct monitor_work;
 283         struct work_struct chswitch_work;
 284         struct work_struct beacon_loss_work;
 285
 286         unsigned long probe_timeout;
 287         int probe_send_count;
 288
 289         struct mutex mtx;
 290         struct ieee80211_bss *associated;
 291         struct ieee80211_mgd_work *old_associate_work;
 292         struct list_head work_list;
 293
 294         u8 bssid[ETH_ALEN];
 295
 296         u16 aid;
 297         u16 capab;
 298
 299         struct sk_buff_head skb_queue;
 300
 301         unsigned long timers_running; /* used for quiesce/restart */
 302         bool powersave; /* powersave requested for this iface */
 303
 304         unsigned long request;
 305
 306         unsigned int flags;
 307
 308         u32 beacon_crc;
 309
 310         enum {
 311                 IEEE80211_MFP_DISABLED,
 312                 IEEE80211_MFP_OPTIONAL,
 313                 IEEE80211_MFP_REQUIRED
 314         } mfp; /* management frame protection */
 315
 316         int wmm_last_param_set;
 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 sk_buff_head skb_queue;
 359
 360         unsigned long timers_running;
 361
 362         unsigned long wrkq_flags;
 363
 364         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 365         size_t mesh_id_len;
 366         /* Active Path Selection Protocol Identifier */
 367         u8 mesh_pp_id;
 368         /* Active Path Selection Metric Identifier */
 369         u8 mesh_pm_id;
 370         /* Congestion Control Mode Identifier */
 371         u8 mesh_cc_id;
 372         /* Synchronization Protocol Identifier */
 373         u8 mesh_sp_id;
 374         /* Authentication Protocol Identifier */
 375         u8 mesh_auth_id;
 376         /* Local mesh Sequence Number */
 377         u32 sn;
 378         /* Last used PREQ ID */
 379         u32 preq_id;
 380         atomic_t mpaths;
 381         /* Timestamp of last SN update */
 382         unsigned long last_sn_update;
 383         /* Timestamp of last SN sent */
 384         unsigned long last_preq;
 385         struct mesh_rmc *rmc;
 386         spinlock_t mesh_preq_queue_lock;
 387         struct mesh_preq_queue preq_queue;
 388         int preq_queue_len;
 389         struct mesh_stats mshstats;
 390         struct mesh_config mshcfg;
 391         u32 mesh_seqnum;
 392         bool accepting_plinks;
 393 };
 394
 395 #ifdef CONFIG_MAC80211_MESH
 396 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 397         do { (msh)->mshstats.name++; } while (0)
 398 #else
 399 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 400         do { } while (0)
 401 #endif
 402
 403 /**
 404  * enum ieee80211_sub_if_data_flags - virtual interface flags
 405  *
 406  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 407  * @IEEE80211_SDATA_PROMISC: interface is promisc
 408  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 409  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 410  *      associated stations and deliver multicast frames both
 411  *      back to wireless media and to the local net stack.
 412  */
 413 enum ieee80211_sub_if_data_flags {
 414         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 415         IEEE80211_SDATA_PROMISC                 = BIT(1),
 416         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 417         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 418 };
 419
 420 struct ieee80211_sub_if_data {
 421         struct list_head list;
 422
 423         struct wireless_dev wdev;
 424
 425         /* keys */
 426         struct list_head key_list;
 427
 428         struct net_device *dev;
 429         struct ieee80211_local *local;
 430
 431         unsigned int flags;
 432
 433         int drop_unencrypted;
 434
 435         /*
 436          * keep track of whether the HT opmode (stored in
 437          * vif.bss_info.ht_operation_mode) is valid.
 438          */
 439         bool ht_opmode_valid;
 440
 441         /* Fragment table for host-based reassembly */
 442         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 443         unsigned int fragment_next;
 444
 445 #define NUM_DEFAULT_KEYS 4
 446 #define NUM_DEFAULT_MGMT_KEYS 2
 447         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 448         struct ieee80211_key *default_key;
 449         struct ieee80211_key *default_mgmt_key;
 450
 451         u16 sequence_number;
 452
 453         /*
 454          * AP this belongs to: self in AP mode and
 455          * corresponding AP in VLAN mode, NULL for
 456          * all others (might be needed later in IBSS)
 457          */
 458         struct ieee80211_if_ap *bss;
 459
 460         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 461         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 462
 463         bool use_4addr; /* use 4-address frames */
 464
 465         union {
 466                 struct ieee80211_if_ap ap;
 467                 struct ieee80211_if_wds wds;
 468                 struct ieee80211_if_vlan vlan;
 469                 struct ieee80211_if_managed mgd;
 470                 struct ieee80211_if_ibss ibss;
 471 #ifdef CONFIG_MAC80211_MESH
 472                 struct ieee80211_if_mesh mesh;
 473 #endif
 474                 u32 mntr_flags;
 475         } u;
 476
 477 #ifdef CONFIG_MAC80211_DEBUGFS
 478         struct {
 479                 struct dentry *dir;
 480                 struct dentry *default_key;
 481                 struct dentry *default_mgmt_key;
 482         } debugfs;
 483 #endif
 484         /* must be last, dynamically sized area in this! */
 485         struct ieee80211_vif vif;
 486 };
 487
 488 static inline
 489 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 490 {
 491         return container_of(p, struct ieee80211_sub_if_data, vif);
 492 }
 493
 494 static inline void
 495 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 496                             u8 mesh_id_len, u8 *mesh_id)
 497 {
 498 #ifdef CONFIG_MAC80211_MESH
 499         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 500         ifmsh->mesh_id_len = mesh_id_len;
 501         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 502 #else
 503         WARN_ON(1);
 504 #endif
 505 }
 506
 507 enum {
 508         IEEE80211_RX_MSG        = 1,
 509         IEEE80211_TX_STATUS_MSG = 2,
 510         IEEE80211_DELBA_MSG     = 3,
 511         IEEE80211_ADDBA_MSG     = 4,
 512 };
 513
 514 enum queue_stop_reason {
 515         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 516         IEEE80211_QUEUE_STOP_REASON_PS,
 517         IEEE80211_QUEUE_STOP_REASON_CSA,
 518         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 519         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 520         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 521 };
 522
 523 /**
 524  * mac80211 scan flags - currently active scan mode
 525  *
 526  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 527  *      well be on the operating channel
 528  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 529  *      determine if we are on the operating channel or not
 530  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 531  *      gets only set in conjunction with SCAN_SW_SCANNING
 532  */
 533 enum {
 534         SCAN_SW_SCANNING,
 535         SCAN_HW_SCANNING,
 536         SCAN_OFF_CHANNEL,
 537 };
 538
 539 /**
 540  * enum mac80211_scan_state - scan state machine states
 541  *
 542  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 543  *      determines if we should keep on scanning or switch back to the
 544  *      operating channel
 545  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 546  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 547  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 548  *      about us leaving the channel and stop all associated STA interfaces
 549  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 550  *      AP about us being back and restart all associated STA interfaces
 551  */
 552 enum mac80211_scan_state {
 553         SCAN_DECISION,
 554         SCAN_SET_CHANNEL,
 555         SCAN_SEND_PROBE,
 556         SCAN_LEAVE_OPER_CHANNEL,
 557         SCAN_ENTER_OPER_CHANNEL,
 558 };
 559
 560 struct ieee80211_local {
 561         /* embed the driver visible part.
 562          * don't cast (use the static inlines below), but we keep
 563          * it first anyway so they become a no-op */
 564         struct ieee80211_hw hw;
 565
 566         const struct ieee80211_ops *ops;
 567
 568         /*
 569          * private workqueue to mac80211. mac80211 makes this accessible
 570          * via ieee80211_queue_work()
 571          */
 572         struct workqueue_struct *workqueue;
 573
 574         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 575         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 576         spinlock_t queue_stop_reason_lock;
 577
 578         int open_count;
 579         int monitors, cooked_mntrs;
 580         /* number of interfaces with corresponding FIF_ flags */
 581         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
 582         unsigned int filter_flags; /* FIF_* */
 583         struct iw_statistics wstats;
 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         /* aggregated multicast list */
 592         struct dev_addr_list *mc_list;
 593         int mc_count;
 594
 595         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 596
 597         /*
 598          * suspended is true if we finished all the suspend _and_ we have
 599          * not yet come up from resume. This is to be used by mac80211
 600          * to ensure driver sanity during suspend and mac80211's own
 601          * sanity. It can eventually be used for WoW as well.
 602          */
 603         bool suspended;
 604
 605         /*
 606          * quiescing is true during the suspend process _only_ to
 607          * ease timer cancelling etc.
 608          */
 609         bool quiescing;
 610
 611         /* device is started */
 612         bool started;
 613
 614         int tx_headroom; /* required headroom for hardware/radiotap */
 615
 616         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 617          * added to skb_queue will be processed, but frames in
 618          * skb_queue_unreliable may be dropped if the total length of these
 619          * queues increases over the limit. */
 620 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 621         struct tasklet_struct tasklet;
 622         struct sk_buff_head skb_queue;
 623         struct sk_buff_head skb_queue_unreliable;
 624
 625         /* Station data */
 626         /*
 627          * The lock only protects the list, hash, timer and counter
 628          * against manipulation, reads are done in RCU. Additionally,
 629          * the lock protects each BSS's TIM bitmap.
 630          */
 631         spinlock_t sta_lock;
 632         unsigned long num_sta;
 633         struct list_head sta_list;
 634         struct sta_info *sta_hash[STA_HASH_SIZE];
 635         struct timer_list sta_cleanup;
 636         int sta_generation;
 637
 638         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 639         struct tasklet_struct tx_pending_tasklet;
 640
 641         /*
 642          * This lock is used to prevent concurrent A-MPDU
 643          * session start/stop processing, this thus also
 644          * synchronises the ->ampdu_action() callback to
 645          * drivers and limits it to one at a time.
 646          */
 647         spinlock_t ampdu_lock;
 648
 649         /* number of interfaces with corresponding IFF_ flags */
 650         atomic_t iff_allmultis, iff_promiscs;
 651
 652         struct rate_control_ref *rate_ctrl;
 653
 654         struct crypto_blkcipher *wep_tx_tfm;
 655         struct crypto_blkcipher *wep_rx_tfm;
 656         u32 wep_iv;
 657
 658         /* see iface.c */
 659         struct list_head interfaces;
 660         struct mutex iflist_mtx;
 661
 662         /*
 663          * Key lock, protects sdata's key_list and sta_info's
 664          * key pointers (write access, they're RCU.)
 665          */
 666         spinlock_t key_lock;
 667
 668
 669         /* Scanning and BSS list */
 670         struct mutex scan_mtx;
 671         unsigned long scanning;
 672         struct cfg80211_ssid scan_ssid;
 673         struct cfg80211_scan_request *int_scan_req;
 674         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 675         struct ieee80211_channel *scan_channel;
 676         enum ieee80211_band hw_scan_band;
 677         int scan_channel_idx;
 678         int scan_ies_len;
 679
 680         enum mac80211_scan_state next_scan_state;
 681         struct delayed_work scan_work;
 682         struct ieee80211_sub_if_data *scan_sdata;
 683         enum nl80211_channel_type oper_channel_type;
 684         struct ieee80211_channel *oper_channel, *csa_channel;
 685
 686         /* SNMP counters */
 687         /* dot11CountersTable */
 688         u32 dot11TransmittedFragmentCount;
 689         u32 dot11MulticastTransmittedFrameCount;
 690         u32 dot11FailedCount;
 691         u32 dot11RetryCount;
 692         u32 dot11MultipleRetryCount;
 693         u32 dot11FrameDuplicateCount;
 694         u32 dot11ReceivedFragmentCount;
 695         u32 dot11MulticastReceivedFrameCount;
 696         u32 dot11TransmittedFrameCount;
 697
 698 #ifdef CONFIG_MAC80211_LEDS
 699         int tx_led_counter, rx_led_counter;
 700         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 701         char tx_led_name[32], rx_led_name[32],
 702              assoc_led_name[32], radio_led_name[32];
 703 #endif
 704
 705 #ifdef CONFIG_MAC80211_DEBUGFS
 706         struct work_struct sta_debugfs_add;
 707 #endif
 708
 709 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 710         /* TX/RX handler statistics */
 711         unsigned int tx_handlers_drop;
 712         unsigned int tx_handlers_queued;
 713         unsigned int tx_handlers_drop_unencrypted;
 714         unsigned int tx_handlers_drop_fragment;
 715         unsigned int tx_handlers_drop_wep;
 716         unsigned int tx_handlers_drop_not_assoc;
 717         unsigned int tx_handlers_drop_unauth_port;
 718         unsigned int rx_handlers_drop;
 719         unsigned int rx_handlers_queued;
 720         unsigned int rx_handlers_drop_nullfunc;
 721         unsigned int rx_handlers_drop_defrag;
 722         unsigned int rx_handlers_drop_short;
 723         unsigned int rx_handlers_drop_passive_scan;
 724         unsigned int tx_expand_skb_head;
 725         unsigned int tx_expand_skb_head_cloned;
 726         unsigned int rx_expand_skb_head;
 727         unsigned int rx_expand_skb_head2;
 728         unsigned int rx_handlers_fragments;
 729         unsigned int tx_status_drop;
 730 #define I802_DEBUG_INC(c) (c)++
 731 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 732 #define I802_DEBUG_INC(c) do { } while (0)
 733 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 734
 735
 736         int total_ps_buffered; /* total number of all buffered unicast and
 737                                 * multicast packets for power saving stations
 738                                 */
 739         int wifi_wme_noack_test;
 740         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 741
 742         bool pspolling;
 743         /*
 744          * PS can only be enabled when we have exactly one managed
 745          * interface (and monitors) in PS, this then points there.
 746          */
 747         struct ieee80211_sub_if_data *ps_sdata;
 748         struct work_struct dynamic_ps_enable_work;
 749         struct work_struct dynamic_ps_disable_work;
 750         struct timer_list dynamic_ps_timer;
 751         struct notifier_block network_latency_notifier;
 752
 753         int user_power_level; /* in dBm */
 754         int power_constr_level; /* in dBm */
 755
 756         struct work_struct restart_work;
 757
 758 #ifdef CONFIG_MAC80211_DEBUGFS
 759         struct local_debugfsdentries {
 760                 struct dentry *rcdir;
 761                 struct dentry *stations;
 762                 struct dentry *keys;
 763         } debugfs;
 764 #endif
 765 };
 766
 767 static inline struct ieee80211_sub_if_data *
 768 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 769 {
 770         return netdev_priv(dev);
 771 }
 772
 773 /* this struct represents 802.11n's RA/TID combination */
 774 struct ieee80211_ra_tid {
 775         u8 ra[ETH_ALEN];
 776         u16 tid;
 777 };
 778
 779 /* Parsed Information Elements */
 780 struct ieee802_11_elems {
 781         u8 *ie_start;
 782         size_t total_len;
 783
 784         /* pointers to IEs */
 785         u8 *ssid;
 786         u8 *supp_rates;
 787         u8 *fh_params;
 788         u8 *ds_params;
 789         u8 *cf_params;
 790         struct ieee80211_tim_ie *tim;
 791         u8 *ibss_params;
 792         u8 *challenge;
 793         u8 *wpa;
 794         u8 *rsn;
 795         u8 *erp_info;
 796         u8 *ext_supp_rates;
 797         u8 *wmm_info;
 798         u8 *wmm_param;
 799         struct ieee80211_ht_cap *ht_cap_elem;
 800         struct ieee80211_ht_info *ht_info_elem;
 801         u8 *mesh_config;
 802         u8 *mesh_id;
 803         u8 *peer_link;
 804         u8 *preq;
 805         u8 *prep;
 806         u8 *perr;
 807         struct ieee80211_rann_ie *rann;
 808         u8 *ch_switch_elem;
 809         u8 *country_elem;
 810         u8 *pwr_constr_elem;
 811         u8 *quiet_elem;         /* first quite element */
 812         u8 *timeout_int;
 813
 814         /* length of them, respectively */
 815         u8 ssid_len;
 816         u8 supp_rates_len;
 817         u8 fh_params_len;
 818         u8 ds_params_len;
 819         u8 cf_params_len;
 820         u8 tim_len;
 821         u8 ibss_params_len;
 822         u8 challenge_len;
 823         u8 wpa_len;
 824         u8 rsn_len;
 825         u8 erp_info_len;
 826         u8 ext_supp_rates_len;
 827         u8 wmm_info_len;
 828         u8 wmm_param_len;
 829         u8 mesh_config_len;
 830         u8 mesh_id_len;
 831         u8 peer_link_len;
 832         u8 preq_len;
 833         u8 prep_len;
 834         u8 perr_len;
 835         u8 ch_switch_elem_len;
 836         u8 country_elem_len;
 837         u8 pwr_constr_elem_len;
 838         u8 quiet_elem_len;
 839         u8 num_of_quiet_elem;   /* can be more the one */
 840         u8 timeout_int_len;
 841 };
 842
 843 static inline struct ieee80211_local *hw_to_local(
 844         struct ieee80211_hw *hw)
 845 {
 846         return container_of(hw, struct ieee80211_local, hw);
 847 }
 848
 849 static inline struct ieee80211_hw *local_to_hw(
 850         struct ieee80211_local *local)
 851 {
 852         return &local->hw;
 853 }
 854
 855
 856 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 857 {
 858         return compare_ether_addr(raddr, addr) == 0 ||
 859                is_broadcast_ether_addr(raddr);
 860 }
 861
 862
 863 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 864 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 865 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 866                                       u32 changed);
 867 void ieee80211_configure_filter(struct ieee80211_local *local);
 868 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 869
 870 /* STA code */
 871 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 872 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
 873                        struct cfg80211_auth_request *req);
 874 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 875                         struct cfg80211_assoc_request *req);
 876 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 877                          struct cfg80211_deauth_request *req,
 878                          void *cookie);
 879 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
 880                            struct cfg80211_disassoc_request *req,
 881                            void *cookie);
 882 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 883                                           struct sk_buff *skb);
 884 void ieee80211_send_pspoll(struct ieee80211_local *local,
 885                            struct ieee80211_sub_if_data *sdata);
 886 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 887 int ieee80211_max_network_latency(struct notifier_block *nb,
 888                                   unsigned long data, void *dummy);
 889 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 890                                       struct ieee80211_channel_sw_ie *sw_elem,
 891                                       struct ieee80211_bss *bss);
 892 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 893 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 894
 895 /* IBSS code */
 896 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 897 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 898 ieee80211_rx_result
 899 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 900 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 901                                         u8 *bssid, u8 *addr, u32 supp_rates);
 902 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 903                         struct cfg80211_ibss_params *params);
 904 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 905 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 906 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 907
 908 /* scan/BSS handling */
 909 void ieee80211_scan_work(struct work_struct *work);
 910 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 911                                     const u8 *ssid, u8 ssid_len);
 912 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 913                            struct cfg80211_scan_request *req);
 914 void ieee80211_scan_cancel(struct ieee80211_local *local);
 915 ieee80211_rx_result
 916 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 917
 918 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 919 struct ieee80211_bss *
 920 ieee80211_bss_info_update(struct ieee80211_local *local,
 921                           struct ieee80211_rx_status *rx_status,
 922                           struct ieee80211_mgmt *mgmt,
 923                           size_t len,
 924                           struct ieee802_11_elems *elems,
 925                           struct ieee80211_channel *channel,
 926                           bool beacon);
 927 struct ieee80211_bss *
 928 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 929                      u8 *ssid, u8 ssid_len);
 930 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 931                           struct ieee80211_bss *bss);
 932
 933 /* interface handling */
 934 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 935                      struct net_device **new_dev, enum nl80211_iftype type,
 936                      struct vif_params *params);
 937 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 938                              enum nl80211_iftype type);
 939 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 940 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 941 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
 942 void ieee80211_recalc_idle(struct ieee80211_local *local);
 943
 944 /* tx handling */
 945 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 946 void ieee80211_tx_pending(unsigned long data);
 947 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 948                                          struct net_device *dev);
 949 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 950                                        struct net_device *dev);
 951
 952 /* HT */
 953 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 954                                        struct ieee80211_ht_cap *ht_cap_ie,
 955                                        struct ieee80211_sta_ht_cap *ht_cap);
 956 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 957 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
 958                           const u8 *da, u16 tid,
 959                           u16 initiator, u16 reason_code);
 960
 961 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 962                                 u16 tid, u16 initiator, u16 reason);
 963 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 964                                     u16 initiator, u16 reason);
 965 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
 966 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 967                              struct sta_info *sta,
 968                              struct ieee80211_mgmt *mgmt, size_t len);
 969 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 970                                   struct sta_info *sta,
 971                                   struct ieee80211_mgmt *mgmt,
 972                                   size_t len);
 973 void ieee80211_process_addba_request(struct ieee80211_local *local,
 974                                      struct sta_info *sta,
 975                                      struct ieee80211_mgmt *mgmt,
 976                                      size_t len);
 977
 978 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 979                                    enum ieee80211_back_parties initiator);
 980
 981 /* Spectrum management */
 982 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
 983                                        struct ieee80211_mgmt *mgmt,
 984                                        size_t len);
 985
 986 /* Suspend/resume and hw reconfiguration */
 987 int ieee80211_reconfig(struct ieee80211_local *local);
 988 void ieee80211_stop_device(struct ieee80211_local *local);
 989
 990 #ifdef CONFIG_PM
 991 int __ieee80211_suspend(struct ieee80211_hw *hw);
 992
 993 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
 994 {
 995         return ieee80211_reconfig(hw_to_local(hw));
 996 }
 997 #else
 998 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
 999 {
1000         return 0;
1001 }
1002
1003 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1004 {
1005         return 0;
1006 }
1007 #endif
1008
1009 /* utility functions/constants */
1010 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1011 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1012                         enum nl80211_iftype type);
1013 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1014                              int rate, int erp, int short_preamble);
1015 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1016                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1017                                      gfp_t gfp);
1018 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1019 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1020                       int encrypt);
1021 void ieee802_11_parse_elems(u8 *start, size_t len,
1022                             struct ieee802_11_elems *elems);
1023 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1024                                struct ieee802_11_elems *elems,
1025                                u64 filter, u32 crc);
1026 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1027                               enum ieee80211_band band);
1028
1029 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1030 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1031 void ieee80211_dynamic_ps_timer(unsigned long data);
1032 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1033                              struct ieee80211_sub_if_data *sdata,
1034                              int powersave);
1035 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1036                              struct ieee80211_hdr *hdr);
1037 void ieee80211_beacon_loss_work(struct work_struct *work);
1038
1039 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1040                                      enum queue_stop_reason reason);
1041 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1042                                      enum queue_stop_reason reason);
1043 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1044                                     enum queue_stop_reason reason);
1045 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1046                                     enum queue_stop_reason reason);
1047 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1048                                struct sk_buff *skb);
1049 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1050                                struct sk_buff_head *skbs);
1051
1052 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1053                          u16 transaction, u16 auth_alg,
1054                          u8 *extra, size_t extra_len, const u8 *bssid,
1055                          const u8 *key, u8 key_len, u8 key_idx);
1056 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1057                              const u8 *ie, size_t ie_len,
1058                              enum ieee80211_band band);
1059 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1060                               const u8 *ssid, size_t ssid_len,
1061                               const u8 *ie, size_t ie_len);
1062
1063 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1064                                   const size_t supp_rates_len,
1065                                   const u8 *supp_rates);
1066 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1067                             struct ieee802_11_elems *elems,
1068                             enum ieee80211_band band);
1069
1070 #ifdef CONFIG_MAC80211_NOINLINE
1071 #define debug_noinline noinline
1072 #else
1073 #define debug_noinline
1074 #endif
1075
1076 #endif /* IEEE80211_I_H */