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/iw_handler.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 net_device *dev;
 144         struct ieee80211_local *local;
 145         struct ieee80211_sub_if_data *sdata;
 146         struct sta_info *sta;
 147         struct ieee80211_key *key;
 148
 149         struct ieee80211_channel *channel;
 150
 151         u16 ethertype;
 152         unsigned int flags;
 153 };
 154
 155
 156 typedef unsigned __bitwise__ ieee80211_rx_result;
 157 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 158 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 159 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 160 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 161
 162 #define IEEE80211_RX_IN_SCAN            BIT(0)
 163 /* frame is destined to interface currently processed (incl. multicast frames) */
 164 #define IEEE80211_RX_RA_MATCH           BIT(1)
 165 #define IEEE80211_RX_AMSDU              BIT(2)
 166 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 167 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 168
 169 struct ieee80211_rx_data {
 170         struct sk_buff *skb;
 171         struct net_device *dev;
 172         struct ieee80211_local *local;
 173         struct ieee80211_sub_if_data *sdata;
 174         struct sta_info *sta;
 175         struct ieee80211_key *key;
 176         struct ieee80211_rx_status *status;
 177         struct ieee80211_rate *rate;
 178
 179         unsigned int flags;
 180         int sent_ps_buffered;
 181         int queue;
 182         u32 tkip_iv32;
 183         u16 tkip_iv16;
 184 };
 185
 186 struct beacon_data {
 187         u8 *head, *tail;
 188         int head_len, tail_len;
 189         int dtim_period;
 190 };
 191
 192 struct ieee80211_if_ap {
 193         struct beacon_data *beacon;
 194
 195         struct list_head vlans;
 196
 197         /* yes, this looks ugly, but guarantees that we can later use
 198          * bitmap_empty :)
 199          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 200         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 201         struct sk_buff_head ps_bc_buf;
 202         atomic_t num_sta_ps; /* number of stations in PS mode */
 203         int dtim_count;
 204 };
 205
 206 struct ieee80211_if_wds {
 207         struct sta_info *sta;
 208         u8 remote_addr[ETH_ALEN];
 209 };
 210
 211 struct ieee80211_if_vlan {
 212         struct list_head list;
 213 };
 214
 215 struct mesh_stats {
 216         __u32 fwded_frames;             /* Mesh 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 /* flags used in struct ieee80211_if_managed.flags */
 231 enum ieee80211_sta_flags {
 232         IEEE80211_STA_PREV_BSSID_SET    = BIT(0),
 233         IEEE80211_STA_AUTHENTICATED     = BIT(1),
 234         IEEE80211_STA_ASSOCIATED        = BIT(2),
 235         IEEE80211_STA_PROBEREQ_POLL     = BIT(3),
 236         IEEE80211_STA_CONTROL_PORT      = BIT(4),
 237         IEEE80211_STA_WMM_ENABLED       = BIT(5),
 238         IEEE80211_STA_DISABLE_11N       = BIT(6),
 239         IEEE80211_STA_CSA_RECEIVED      = BIT(7),
 240         IEEE80211_STA_MFP_ENABLED       = BIT(8),
 241 };
 242
 243 /* flags for MLME request */
 244 enum ieee80211_sta_request {
 245         IEEE80211_STA_REQ_SCAN,
 246         IEEE80211_STA_REQ_AUTH,
 247         IEEE80211_STA_REQ_RUN,
 248 };
 249
 250 struct ieee80211_if_managed {
 251         struct timer_list timer;
 252         struct timer_list chswitch_timer;
 253         struct work_struct work;
 254         struct work_struct chswitch_work;
 255         struct work_struct beacon_loss_work;
 256
 257         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 258
 259         u8 ssid[IEEE80211_MAX_SSID_LEN];
 260         size_t ssid_len;
 261
 262         enum {
 263                 IEEE80211_STA_MLME_DISABLED,
 264                 IEEE80211_STA_MLME_DIRECT_PROBE,
 265                 IEEE80211_STA_MLME_AUTHENTICATE,
 266                 IEEE80211_STA_MLME_ASSOCIATE,
 267                 IEEE80211_STA_MLME_ASSOCIATED,
 268         } state;
 269
 270         u16 aid;
 271         u16 ap_capab, capab;
 272         u8 *extra_ie; /* to be added to the end of AssocReq */
 273         size_t extra_ie_len;
 274
 275         /* The last AssocReq/Resp IEs */
 276         u8 *assocreq_ies, *assocresp_ies;
 277         size_t assocreq_ies_len, assocresp_ies_len;
 278
 279         struct sk_buff_head skb_queue;
 280
 281         int assoc_scan_tries; /* number of scans done pre-association */
 282         int direct_probe_tries; /* retries for direct probes */
 283         int auth_tries; /* retries for auth req */
 284         int assoc_tries; /* retries for assoc req */
 285
 286         unsigned long timers_running; /* used for quiesce/restart */
 287         bool powersave; /* powersave requested for this iface */
 288
 289         unsigned long request;
 290
 291         unsigned long last_probe;
 292         unsigned long last_beacon;
 293
 294         unsigned int flags;
 295
 296         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 297         int auth_transaction;
 298
 299         u32 beacon_crc;
 300
 301         enum {
 302                 IEEE80211_MFP_DISABLED,
 303                 IEEE80211_MFP_OPTIONAL,
 304                 IEEE80211_MFP_REQUIRED
 305         } mfp; /* management frame protection */
 306
 307         int wmm_last_param_set;
 308
 309         /* Extra IE data for management frames */
 310         u8 *sme_auth_ie;
 311         size_t sme_auth_ie_len;
 312 };
 313
 314 enum ieee80211_ibss_request {
 315         IEEE80211_IBSS_REQ_RUN  = 0,
 316 };
 317
 318 struct ieee80211_if_ibss {
 319         struct timer_list timer;
 320         struct work_struct work;
 321
 322         struct sk_buff_head skb_queue;
 323
 324         unsigned long request;
 325         unsigned long last_scan_completed;
 326
 327         bool timer_running;
 328
 329         bool fixed_bssid;
 330         bool fixed_channel;
 331
 332         u8 bssid[ETH_ALEN];
 333         u8 ssid[IEEE80211_MAX_SSID_LEN];
 334         u8 ssid_len, ie_len;
 335         u8 *ie;
 336         struct ieee80211_channel *channel;
 337
 338         unsigned long ibss_join_req;
 339         /* probe response/beacon for IBSS */
 340         struct sk_buff *presp, *skb;
 341
 342         enum {
 343                 IEEE80211_IBSS_MLME_SEARCH,
 344                 IEEE80211_IBSS_MLME_JOINED,
 345         } state;
 346 };
 347
 348 struct ieee80211_if_mesh {
 349         struct work_struct work;
 350         struct timer_list housekeeping_timer;
 351         struct timer_list mesh_path_timer;
 352         struct sk_buff_head skb_queue;
 353
 354         unsigned long timers_running;
 355
 356         bool housekeeping;
 357
 358         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 359         size_t mesh_id_len;
 360         /* Active Path Selection Protocol Identifier */
 361         u8 mesh_pp_id[4];
 362         /* Active Path Selection Metric Identifier */
 363         u8 mesh_pm_id[4];
 364         /* Congestion Control Mode Identifier */
 365         u8 mesh_cc_id[4];
 366         /* Local mesh Destination Sequence Number */
 367         u32 dsn;
 368         /* Last used PREQ ID */
 369         u32 preq_id;
 370         atomic_t mpaths;
 371         /* Timestamp of last DSN update */
 372         unsigned long last_dsn_update;
 373         /* Timestamp of last DSN sent */
 374         unsigned long last_preq;
 375         struct mesh_rmc *rmc;
 376         spinlock_t mesh_preq_queue_lock;
 377         struct mesh_preq_queue preq_queue;
 378         int preq_queue_len;
 379         struct mesh_stats mshstats;
 380         struct mesh_config mshcfg;
 381         u32 mesh_seqnum;
 382         bool accepting_plinks;
 383 };
 384
 385 #ifdef CONFIG_MAC80211_MESH
 386 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 387         do { (msh)->mshstats.name++; } while (0)
 388 #else
 389 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 390         do { } while (0)
 391 #endif
 392
 393 /**
 394  * enum ieee80211_sub_if_data_flags - virtual interface flags
 395  *
 396  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 397  * @IEEE80211_SDATA_PROMISC: interface is promisc
 398  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 399  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 400  *      associated stations and deliver multicast frames both
 401  *      back to wireless media and to the local net stack.
 402  */
 403 enum ieee80211_sub_if_data_flags {
 404         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 405         IEEE80211_SDATA_PROMISC                 = BIT(1),
 406         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 407         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 408 };
 409
 410 struct ieee80211_sub_if_data {
 411         struct list_head list;
 412
 413         struct wireless_dev wdev;
 414
 415         /* keys */
 416         struct list_head key_list;
 417
 418         struct net_device *dev;
 419         struct ieee80211_local *local;
 420
 421         unsigned int flags;
 422
 423         int drop_unencrypted;
 424
 425         /*
 426          * keep track of whether the HT opmode (stored in
 427          * vif.bss_info.ht_operation_mode) is valid.
 428          */
 429         bool ht_opmode_valid;
 430
 431         /* Fragment table for host-based reassembly */
 432         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 433         unsigned int fragment_next;
 434
 435 #define NUM_DEFAULT_KEYS 4
 436 #define NUM_DEFAULT_MGMT_KEYS 2
 437         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 438         struct ieee80211_key *default_key;
 439         struct ieee80211_key *default_mgmt_key;
 440
 441         u16 sequence_number;
 442
 443         /*
 444          * AP this belongs to: self in AP mode and
 445          * corresponding AP in VLAN mode, NULL for
 446          * all others (might be needed later in IBSS)
 447          */
 448         struct ieee80211_if_ap *bss;
 449
 450         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 451         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 452
 453         union {
 454                 struct ieee80211_if_ap ap;
 455                 struct ieee80211_if_wds wds;
 456                 struct ieee80211_if_vlan vlan;
 457                 struct ieee80211_if_managed mgd;
 458                 struct ieee80211_if_ibss ibss;
 459 #ifdef CONFIG_MAC80211_MESH
 460                 struct ieee80211_if_mesh mesh;
 461 #endif
 462                 u32 mntr_flags;
 463         } u;
 464
 465 #ifdef CONFIG_MAC80211_DEBUGFS
 466         struct dentry *debugfsdir;
 467         union {
 468                 struct {
 469                         struct dentry *drop_unencrypted;
 470                         struct dentry *state;
 471                         struct dentry *bssid;
 472                         struct dentry *prev_bssid;
 473                         struct dentry *ssid_len;
 474                         struct dentry *aid;
 475                         struct dentry *ap_capab;
 476                         struct dentry *capab;
 477                         struct dentry *extra_ie_len;
 478                         struct dentry *auth_tries;
 479                         struct dentry *assoc_tries;
 480                         struct dentry *auth_alg;
 481                         struct dentry *auth_transaction;
 482                         struct dentry *flags;
 483                         struct dentry *force_unicast_rateidx;
 484                         struct dentry *max_ratectrl_rateidx;
 485                 } sta;
 486                 struct {
 487                         struct dentry *drop_unencrypted;
 488                         struct dentry *num_sta_ps;
 489                         struct dentry *dtim_count;
 490                         struct dentry *force_unicast_rateidx;
 491                         struct dentry *max_ratectrl_rateidx;
 492                         struct dentry *num_buffered_multicast;
 493                 } ap;
 494                 struct {
 495                         struct dentry *drop_unencrypted;
 496                         struct dentry *peer;
 497                         struct dentry *force_unicast_rateidx;
 498                         struct dentry *max_ratectrl_rateidx;
 499                 } wds;
 500                 struct {
 501                         struct dentry *drop_unencrypted;
 502                         struct dentry *force_unicast_rateidx;
 503                         struct dentry *max_ratectrl_rateidx;
 504                 } vlan;
 505                 struct {
 506                         struct dentry *mode;
 507                 } monitor;
 508         } debugfs;
 509         struct {
 510                 struct dentry *default_key;
 511                 struct dentry *default_mgmt_key;
 512         } common_debugfs;
 513
 514 #ifdef CONFIG_MAC80211_MESH
 515         struct dentry *mesh_stats_dir;
 516         struct {
 517                 struct dentry *fwded_frames;
 518                 struct dentry *dropped_frames_ttl;
 519                 struct dentry *dropped_frames_no_route;
 520                 struct dentry *estab_plinks;
 521                 struct timer_list mesh_path_timer;
 522         } mesh_stats;
 523
 524         struct dentry *mesh_config_dir;
 525         struct {
 526                 struct dentry *dot11MeshRetryTimeout;
 527                 struct dentry *dot11MeshConfirmTimeout;
 528                 struct dentry *dot11MeshHoldingTimeout;
 529                 struct dentry *dot11MeshMaxRetries;
 530                 struct dentry *dot11MeshTTL;
 531                 struct dentry *auto_open_plinks;
 532                 struct dentry *dot11MeshMaxPeerLinks;
 533                 struct dentry *dot11MeshHWMPactivePathTimeout;
 534                 struct dentry *dot11MeshHWMPpreqMinInterval;
 535                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 536                 struct dentry *dot11MeshHWMPmaxPREQretries;
 537                 struct dentry *path_refresh_time;
 538                 struct dentry *min_discovery_timeout;
 539         } mesh_config;
 540 #endif
 541
 542 #endif
 543         /* must be last, dynamically sized area in this! */
 544         struct ieee80211_vif vif;
 545 };
 546
 547 static inline
 548 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 549 {
 550         return container_of(p, struct ieee80211_sub_if_data, vif);
 551 }
 552
 553 static inline void
 554 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 555                             u8 mesh_id_len, u8 *mesh_id)
 556 {
 557 #ifdef CONFIG_MAC80211_MESH
 558         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 559         ifmsh->mesh_id_len = mesh_id_len;
 560         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 561 #else
 562         WARN_ON(1);
 563 #endif
 564 }
 565
 566 enum {
 567         IEEE80211_RX_MSG        = 1,
 568         IEEE80211_TX_STATUS_MSG = 2,
 569         IEEE80211_DELBA_MSG     = 3,
 570         IEEE80211_ADDBA_MSG     = 4,
 571 };
 572
 573 enum queue_stop_reason {
 574         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 575         IEEE80211_QUEUE_STOP_REASON_PS,
 576         IEEE80211_QUEUE_STOP_REASON_CSA,
 577         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 578         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 579         IEEE80211_QUEUE_STOP_REASON_PENDING,
 580         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 581 };
 582
 583 struct ieee80211_master_priv {
 584         struct ieee80211_local *local;
 585 };
 586
 587 struct ieee80211_local {
 588         /* embed the driver visible part.
 589          * don't cast (use the static inlines below), but we keep
 590          * it first anyway so they become a no-op */
 591         struct ieee80211_hw hw;
 592
 593         const struct ieee80211_ops *ops;
 594
 595         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 596         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 597         spinlock_t queue_stop_reason_lock;
 598
 599         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 600         int open_count;
 601         int monitors, cooked_mntrs;
 602         /* number of interfaces with corresponding FIF_ flags */
 603         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 604         unsigned int filter_flags; /* FIF_* */
 605         struct iw_statistics wstats;
 606         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 607
 608         /*
 609          * suspended is true if we finished all the suspend _and_ we have
 610          * not yet come up from resume. This is to be used by mac80211
 611          * to ensure driver sanity during suspend and mac80211's own
 612          * sanity. It can eventually be used for WoW as well.
 613          */
 614         bool suspended;
 615
 616         /*
 617          * quiescing is true during the suspend process _only_ to
 618          * ease timer cancelling etc.
 619          */
 620         bool quiescing;
 621
 622         int tx_headroom; /* required headroom for hardware/radiotap */
 623
 624         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 625          * added to skb_queue will be processed, but frames in
 626          * skb_queue_unreliable may be dropped if the total length of these
 627          * queues increases over the limit. */
 628 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 629         struct tasklet_struct tasklet;
 630         struct sk_buff_head skb_queue;
 631         struct sk_buff_head skb_queue_unreliable;
 632
 633         /* Station data */
 634         /*
 635          * The lock only protects the list, hash, timer and counter
 636          * against manipulation, reads are done in RCU. Additionally,
 637          * the lock protects each BSS's TIM bitmap.
 638          */
 639         spinlock_t sta_lock;
 640         unsigned long num_sta;
 641         struct list_head sta_list;
 642         struct sta_info *sta_hash[STA_HASH_SIZE];
 643         struct timer_list sta_cleanup;
 644
 645         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 646         struct tasklet_struct tx_pending_tasklet;
 647
 648         /*
 649          * This lock is used to prevent concurrent A-MPDU
 650          * session start/stop processing, this thus also
 651          * synchronises the ->ampdu_action() callback to
 652          * drivers and limits it to one at a time.
 653          */
 654         spinlock_t ampdu_lock;
 655
 656         /* number of interfaces with corresponding IFF_ flags */
 657         atomic_t iff_allmultis, iff_promiscs;
 658
 659         struct rate_control_ref *rate_ctrl;
 660
 661         struct crypto_blkcipher *wep_tx_tfm;
 662         struct crypto_blkcipher *wep_rx_tfm;
 663         u32 wep_iv;
 664
 665         /* see iface.c */
 666         struct list_head interfaces;
 667         struct mutex iflist_mtx;
 668
 669         /*
 670          * Key lock, protects sdata's key_list and sta_info's
 671          * key pointers (write access, they're RCU.)
 672          */
 673         spinlock_t key_lock;
 674
 675
 676         /* Scanning and BSS list */
 677         struct mutex scan_mtx;
 678         bool sw_scanning, hw_scanning;
 679         struct cfg80211_ssid scan_ssid;
 680         struct cfg80211_scan_request int_scan_req;
 681         struct cfg80211_scan_request *scan_req;
 682         struct ieee80211_channel *scan_channel;
 683         const u8 *orig_ies;
 684         int orig_ies_len;
 685         int scan_channel_idx;
 686         int scan_ies_len;
 687
 688         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 689         struct delayed_work scan_work;
 690         struct ieee80211_sub_if_data *scan_sdata;
 691         enum nl80211_channel_type oper_channel_type;
 692         struct ieee80211_channel *oper_channel, *csa_channel;
 693
 694         /* SNMP counters */
 695         /* dot11CountersTable */
 696         u32 dot11TransmittedFragmentCount;
 697         u32 dot11MulticastTransmittedFrameCount;
 698         u32 dot11FailedCount;
 699         u32 dot11RetryCount;
 700         u32 dot11MultipleRetryCount;
 701         u32 dot11FrameDuplicateCount;
 702         u32 dot11ReceivedFragmentCount;
 703         u32 dot11MulticastReceivedFrameCount;
 704         u32 dot11TransmittedFrameCount;
 705
 706 #ifdef CONFIG_MAC80211_LEDS
 707         int tx_led_counter, rx_led_counter;
 708         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 709         char tx_led_name[32], rx_led_name[32],
 710              assoc_led_name[32], radio_led_name[32];
 711 #endif
 712
 713 #ifdef CONFIG_MAC80211_DEBUGFS
 714         struct work_struct sta_debugfs_add;
 715 #endif
 716
 717 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 718         /* TX/RX handler statistics */
 719         unsigned int tx_handlers_drop;
 720         unsigned int tx_handlers_queued;
 721         unsigned int tx_handlers_drop_unencrypted;
 722         unsigned int tx_handlers_drop_fragment;
 723         unsigned int tx_handlers_drop_wep;
 724         unsigned int tx_handlers_drop_not_assoc;
 725         unsigned int tx_handlers_drop_unauth_port;
 726         unsigned int rx_handlers_drop;
 727         unsigned int rx_handlers_queued;
 728         unsigned int rx_handlers_drop_nullfunc;
 729         unsigned int rx_handlers_drop_defrag;
 730         unsigned int rx_handlers_drop_short;
 731         unsigned int rx_handlers_drop_passive_scan;
 732         unsigned int tx_expand_skb_head;
 733         unsigned int tx_expand_skb_head_cloned;
 734         unsigned int rx_expand_skb_head;
 735         unsigned int rx_expand_skb_head2;
 736         unsigned int rx_handlers_fragments;
 737         unsigned int tx_status_drop;
 738 #define I802_DEBUG_INC(c) (c)++
 739 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 740 #define I802_DEBUG_INC(c) do { } while (0)
 741 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 742
 743
 744         int total_ps_buffered; /* total number of all buffered unicast and
 745                                 * multicast packets for power saving stations
 746                                 */
 747         int wifi_wme_noack_test;
 748         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 749
 750         bool pspolling;
 751         /*
 752          * PS can only be enabled when we have exactly one managed
 753          * interface (and monitors) in PS, this then points there.
 754          */
 755         struct ieee80211_sub_if_data *ps_sdata;
 756         struct work_struct dynamic_ps_enable_work;
 757         struct work_struct dynamic_ps_disable_work;
 758         struct timer_list dynamic_ps_timer;
 759         struct notifier_block network_latency_notifier;
 760
 761         int user_power_level; /* in dBm */
 762         int power_constr_level; /* in dBm */
 763
 764         struct work_struct restart_work;
 765
 766 #ifdef CONFIG_MAC80211_DEBUGFS
 767         struct local_debugfsdentries {
 768                 struct dentry *rcdir;
 769                 struct dentry *rcname;
 770                 struct dentry *frequency;
 771                 struct dentry *total_ps_buffered;
 772                 struct dentry *wep_iv;
 773                 struct dentry *tsf;
 774                 struct dentry *queues;
 775                 struct dentry *reset;
 776                 struct dentry *noack;
 777                 struct dentry *statistics;
 778                 struct local_debugfsdentries_statsdentries {
 779                         struct dentry *transmitted_fragment_count;
 780                         struct dentry *multicast_transmitted_frame_count;
 781                         struct dentry *failed_count;
 782                         struct dentry *retry_count;
 783                         struct dentry *multiple_retry_count;
 784                         struct dentry *frame_duplicate_count;
 785                         struct dentry *received_fragment_count;
 786                         struct dentry *multicast_received_frame_count;
 787                         struct dentry *transmitted_frame_count;
 788                         struct dentry *wep_undecryptable_count;
 789                         struct dentry *num_scans;
 790 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 791                         struct dentry *tx_handlers_drop;
 792                         struct dentry *tx_handlers_queued;
 793                         struct dentry *tx_handlers_drop_unencrypted;
 794                         struct dentry *tx_handlers_drop_fragment;
 795                         struct dentry *tx_handlers_drop_wep;
 796                         struct dentry *tx_handlers_drop_not_assoc;
 797                         struct dentry *tx_handlers_drop_unauth_port;
 798                         struct dentry *rx_handlers_drop;
 799                         struct dentry *rx_handlers_queued;
 800                         struct dentry *rx_handlers_drop_nullfunc;
 801                         struct dentry *rx_handlers_drop_defrag;
 802                         struct dentry *rx_handlers_drop_short;
 803                         struct dentry *rx_handlers_drop_passive_scan;
 804                         struct dentry *tx_expand_skb_head;
 805                         struct dentry *tx_expand_skb_head_cloned;
 806                         struct dentry *rx_expand_skb_head;
 807                         struct dentry *rx_expand_skb_head2;
 808                         struct dentry *rx_handlers_fragments;
 809                         struct dentry *tx_status_drop;
 810 #endif
 811                         struct dentry *dot11ACKFailureCount;
 812                         struct dentry *dot11RTSFailureCount;
 813                         struct dentry *dot11FCSErrorCount;
 814                         struct dentry *dot11RTSSuccessCount;
 815                 } stats;
 816                 struct dentry *stations;
 817                 struct dentry *keys;
 818         } debugfs;
 819 #endif
 820 };
 821
 822 static inline struct ieee80211_sub_if_data *
 823 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 824 {
 825         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 826
 827         BUG_ON(!local || local->mdev == dev);
 828
 829         return netdev_priv(dev);
 830 }
 831
 832 /* this struct represents 802.11n's RA/TID combination */
 833 struct ieee80211_ra_tid {
 834         u8 ra[ETH_ALEN];
 835         u16 tid;
 836 };
 837
 838 /* Parsed Information Elements */
 839 struct ieee802_11_elems {
 840         u8 *ie_start;
 841         size_t total_len;
 842
 843         /* pointers to IEs */
 844         u8 *ssid;
 845         u8 *supp_rates;
 846         u8 *fh_params;
 847         u8 *ds_params;
 848         u8 *cf_params;
 849         struct ieee80211_tim_ie *tim;
 850         u8 *ibss_params;
 851         u8 *challenge;
 852         u8 *wpa;
 853         u8 *rsn;
 854         u8 *erp_info;
 855         u8 *ext_supp_rates;
 856         u8 *wmm_info;
 857         u8 *wmm_param;
 858         struct ieee80211_ht_cap *ht_cap_elem;
 859         struct ieee80211_ht_info *ht_info_elem;
 860         u8 *mesh_config;
 861         u8 *mesh_id;
 862         u8 *peer_link;
 863         u8 *preq;
 864         u8 *prep;
 865         u8 *perr;
 866         u8 *ch_switch_elem;
 867         u8 *country_elem;
 868         u8 *pwr_constr_elem;
 869         u8 *quiet_elem;         /* first quite element */
 870         u8 *timeout_int;
 871
 872         /* length of them, respectively */
 873         u8 ssid_len;
 874         u8 supp_rates_len;
 875         u8 fh_params_len;
 876         u8 ds_params_len;
 877         u8 cf_params_len;
 878         u8 tim_len;
 879         u8 ibss_params_len;
 880         u8 challenge_len;
 881         u8 wpa_len;
 882         u8 rsn_len;
 883         u8 erp_info_len;
 884         u8 ext_supp_rates_len;
 885         u8 wmm_info_len;
 886         u8 wmm_param_len;
 887         u8 mesh_config_len;
 888         u8 mesh_id_len;
 889         u8 peer_link_len;
 890         u8 preq_len;
 891         u8 prep_len;
 892         u8 perr_len;
 893         u8 ch_switch_elem_len;
 894         u8 country_elem_len;
 895         u8 pwr_constr_elem_len;
 896         u8 quiet_elem_len;
 897         u8 num_of_quiet_elem;   /* can be more the one */
 898         u8 timeout_int_len;
 899 };
 900
 901 static inline struct ieee80211_local *hw_to_local(
 902         struct ieee80211_hw *hw)
 903 {
 904         return container_of(hw, struct ieee80211_local, hw);
 905 }
 906
 907 static inline struct ieee80211_hw *local_to_hw(
 908         struct ieee80211_local *local)
 909 {
 910         return &local->hw;
 911 }
 912
 913
 914 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 915 {
 916         return compare_ether_addr(raddr, addr) == 0 ||
 917                is_broadcast_ether_addr(raddr);
 918 }
 919
 920
 921 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 922 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 923 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 924                                       u32 changed);
 925 void ieee80211_configure_filter(struct ieee80211_local *local);
 926 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 927
 928 /* wireless extensions */
 929 extern const struct iw_handler_def ieee80211_iw_handler_def;
 930
 931 /* STA code */
 932 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 933 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 934                                           struct sk_buff *skb);
 935 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata);
 936 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 937 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 938 void ieee80211_send_pspoll(struct ieee80211_local *local,
 939                            struct ieee80211_sub_if_data *sdata);
 940 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 941 int ieee80211_max_network_latency(struct notifier_block *nb,
 942                                   unsigned long data, void *dummy);
 943 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 944                                       struct ieee80211_channel_sw_ie *sw_elem,
 945                                       struct ieee80211_bss *bss);
 946 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 947 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 948
 949 /* IBSS code */
 950 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 951 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 952 ieee80211_rx_result
 953 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 954 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 955                                         u8 *bssid, u8 *addr, u32 supp_rates);
 956 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 957                         struct cfg80211_ibss_params *params);
 958 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 959 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 960 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 961
 962 /* scan/BSS handling */
 963 void ieee80211_scan_work(struct work_struct *work);
 964 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 965                                     const u8 *ssid, u8 ssid_len);
 966 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 967                            struct cfg80211_scan_request *req);
 968 void ieee80211_scan_cancel(struct ieee80211_local *local);
 969 ieee80211_rx_result
 970 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 971 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 972                                const char *ie, size_t len);
 973
 974 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 975 struct ieee80211_bss *
 976 ieee80211_bss_info_update(struct ieee80211_local *local,
 977                           struct ieee80211_rx_status *rx_status,
 978                           struct ieee80211_mgmt *mgmt,
 979                           size_t len,
 980                           struct ieee802_11_elems *elems,
 981                           struct ieee80211_channel *channel,
 982                           bool beacon);
 983 struct ieee80211_bss *
 984 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 985                      u8 *ssid, u8 ssid_len);
 986 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 987                           struct ieee80211_bss *bss);
 988 void ieee80211_rx_bss_remove(struct ieee80211_sub_if_data *sdata, u8 *bssid,
 989                              int freq, u8 *ssid, u8 ssid_len);
 990
 991 /* interface handling */
 992 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 993                      struct net_device **new_dev, enum nl80211_iftype type,
 994                      struct vif_params *params);
 995 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 996                              enum nl80211_iftype type);
 997 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 998 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 999 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1000 void ieee80211_recalc_idle(struct ieee80211_local *local);
1001
1002 /* tx handling */
1003 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1004 void ieee80211_tx_pending(unsigned long data);
1005 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
1006 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
1007 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
1008
1009 /* HT */
1010 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1011                                        struct ieee80211_ht_cap *ht_cap_ie,
1012                                        struct ieee80211_sta_ht_cap *ht_cap);
1013 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1014 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1015                           const u8 *da, u16 tid,
1016                           u16 initiator, u16 reason_code);
1017
1018 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
1019                                 u16 tid, u16 initiator, u16 reason);
1020 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1021                                     u16 initiator, u16 reason);
1022 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1023 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1024                              struct sta_info *sta,
1025                              struct ieee80211_mgmt *mgmt, size_t len);
1026 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1027                                   struct sta_info *sta,
1028                                   struct ieee80211_mgmt *mgmt,
1029                                   size_t len);
1030 void ieee80211_process_addba_request(struct ieee80211_local *local,
1031                                      struct sta_info *sta,
1032                                      struct ieee80211_mgmt *mgmt,
1033                                      size_t len);
1034
1035 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1036                                    enum ieee80211_back_parties initiator);
1037
1038 /* Spectrum management */
1039 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1040                                        struct ieee80211_mgmt *mgmt,
1041                                        size_t len);
1042
1043 /* Suspend/resume and hw reconfiguration */
1044 int ieee80211_reconfig(struct ieee80211_local *local);
1045
1046 #ifdef CONFIG_PM
1047 int __ieee80211_suspend(struct ieee80211_hw *hw);
1048
1049 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1050 {
1051         return ieee80211_reconfig(hw_to_local(hw));
1052 }
1053 #else
1054 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1055 {
1056         return 0;
1057 }
1058
1059 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1060 {
1061         return 0;
1062 }
1063 #endif
1064
1065 /* utility functions/constants */
1066 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1067 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1068                         enum nl80211_iftype type);
1069 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1070                              int rate, int erp, int short_preamble);
1071 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1072                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1073                                      gfp_t gfp);
1074 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1075 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1076                       int encrypt);
1077 void ieee802_11_parse_elems(u8 *start, size_t len,
1078                             struct ieee802_11_elems *elems);
1079 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1080                                struct ieee802_11_elems *elems,
1081                                u64 filter, u32 crc);
1082 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1083                               enum ieee80211_band band);
1084
1085 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1086 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1087 void ieee80211_dynamic_ps_timer(unsigned long data);
1088 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1089                              struct ieee80211_sub_if_data *sdata,
1090                              int powersave);
1091 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1092                              struct ieee80211_hdr *hdr);
1093 void ieee80211_beacon_loss_work(struct work_struct *work);
1094
1095 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1096                                      enum queue_stop_reason reason);
1097 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1098                                      enum queue_stop_reason reason);
1099 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1100                                     enum queue_stop_reason reason);
1101 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1102                                     enum queue_stop_reason reason);
1103 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1104                                struct sk_buff *skb);
1105 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1106                                struct sk_buff_head *skbs);
1107
1108 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1109                          u16 transaction, u16 auth_alg,
1110                          u8 *extra, size_t extra_len,
1111                          const u8 *bssid, int encrypt);
1112 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1113                              const u8 *ie, size_t ie_len);
1114 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1115                               const u8 *ssid, size_t ssid_len,
1116                               const u8 *ie, size_t ie_len);
1117
1118 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1119                                   const size_t supp_rates_len,
1120                                   const u8 *supp_rates);
1121 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1122                             struct ieee802_11_elems *elems,
1123                             enum ieee80211_band band);
1124
1125 #ifdef CONFIG_MAC80211_NOINLINE
1126 #define debug_noinline noinline
1127 #else
1128 #define debug_noinline
1129 #endif
1130
1131 #endif /* IEEE80211_I_H */