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/wireless.h>
  27 #include <net/iw_handler.h>
  28 #include <net/mac80211.h>
  29 #include "key.h"
  30 #include "sta_info.h"
  31
  32 /* ieee80211.o internal definitions, etc. These are not included into
  33  * low-level drivers. */
  34
  35 struct ieee80211_local;
  36
  37 /* Maximum number of broadcast/multicast frames to buffer when some of the
  38  * associated stations are using power saving. */
  39 #define AP_MAX_BC_BUFFER 128
  40
  41 /* Maximum number of frames buffered to all STAs, including multicast frames.
  42  * Note: increasing this limit increases the potential memory requirement. Each
  43  * frame can be up to about 2 kB long. */
  44 #define TOTAL_MAX_TX_BUFFER 512
  45
  46 /* Required encryption head and tailroom */
  47 #define IEEE80211_ENCRYPT_HEADROOM 8
  48 #define IEEE80211_ENCRYPT_TAILROOM 12
  49
  50 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  51  * reception of at least three fragmented frames. This limit can be increased
  52  * by changing this define, at the cost of slower frame reassembly and
  53  * increased memory use (about 2 kB of RAM per entry). */
  54 #define IEEE80211_FRAGMENT_MAX 4
  55
  56 struct ieee80211_fragment_entry {
  57         unsigned long first_frag_time;
  58         unsigned int seq;
  59         unsigned int rx_queue;
  60         unsigned int last_frag;
  61         unsigned int extra_len;
  62         struct sk_buff_head skb_list;
  63         int ccmp; /* Whether fragments were encrypted with CCMP */
  64         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  65 };
  66
  67
  68 struct ieee80211_sta_bss {
  69         struct list_head list;
  70         struct ieee80211_sta_bss *hnext;
  71         size_t ssid_len;
  72
  73         atomic_t users;
  74
  75         u8 bssid[ETH_ALEN];
  76         u8 ssid[IEEE80211_MAX_SSID_LEN];
  77         u8 dtim_period;
  78         u16 capability; /* host byte order */
  79         enum ieee80211_band band;
  80         int freq;
  81         int signal, noise, qual;
  82         u8 *ies; /* all information elements from the last Beacon or Probe
  83                   * Response frames; note Beacon frame is not allowed to
  84                   * override values from Probe Response */
  85         size_t ies_len;
  86         bool wmm_used;
  87 #ifdef CONFIG_MAC80211_MESH
  88         u8 *mesh_id;
  89         size_t mesh_id_len;
  90         u8 *mesh_cfg;
  91 #endif
  92 #define IEEE80211_MAX_SUPP_RATES 32
  93         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  94         size_t supp_rates_len;
  95         u64 timestamp;
  96         int beacon_int;
  97
  98         unsigned long last_probe_resp;
  99         unsigned long last_update;
 100
 101         /* during assocation, we save an ERP value from a probe response so
 102          * that we can feed ERP info to the driver when handling the
 103          * association completes. these fields probably won't be up-to-date
 104          * otherwise, you probably don't want to use them. */
 105         int has_erp_value;
 106         u8 erp_value;
 107 };
 108
 109 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 110 {
 111 #ifdef CONFIG_MAC80211_MESH
 112         return bss->mesh_cfg;
 113 #endif
 114         return NULL;
 115 }
 116
 117 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 118 {
 119 #ifdef CONFIG_MAC80211_MESH
 120         return bss->mesh_id;
 121 #endif
 122         return NULL;
 123 }
 124
 125 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 126 {
 127 #ifdef CONFIG_MAC80211_MESH
 128         return bss->mesh_id_len;
 129 #endif
 130         return 0;
 131 }
 132
 133
 134 typedef unsigned __bitwise__ ieee80211_tx_result;
 135 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 136 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 137 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 138
 139 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 140 #define IEEE80211_TX_UNICAST            BIT(1)
 141 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 142 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 143
 144 struct ieee80211_tx_data {
 145         struct sk_buff *skb;
 146         struct net_device *dev;
 147         struct ieee80211_local *local;
 148         struct ieee80211_sub_if_data *sdata;
 149         struct sta_info *sta;
 150         struct ieee80211_key *key;
 151
 152         struct ieee80211_channel *channel;
 153         s8 rate_idx;
 154         /* use this rate (if set) for last fragment; rate can
 155          * be set to lower rate for the first fragments, e.g.,
 156          * when using CTS protection with IEEE 802.11g. */
 157         s8 last_frag_rate_idx;
 158
 159         /* Extra fragments (in addition to the first fragment
 160          * in skb) */
 161         struct sk_buff **extra_frag;
 162         int num_extra_frag;
 163
 164         u16 ethertype;
 165         unsigned int flags;
 166 };
 167
 168
 169 typedef unsigned __bitwise__ ieee80211_rx_result;
 170 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 171 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 172 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 173 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 174
 175 #define IEEE80211_RX_IN_SCAN            BIT(0)
 176 /* frame is destined to interface currently processed (incl. multicast frames) */
 177 #define IEEE80211_RX_RA_MATCH           BIT(1)
 178 #define IEEE80211_RX_AMSDU              BIT(2)
 179 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 180 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 181
 182 struct ieee80211_rx_data {
 183         struct sk_buff *skb;
 184         struct net_device *dev;
 185         struct ieee80211_local *local;
 186         struct ieee80211_sub_if_data *sdata;
 187         struct sta_info *sta;
 188         struct ieee80211_key *key;
 189         struct ieee80211_rx_status *status;
 190         struct ieee80211_rate *rate;
 191
 192         u16 ethertype;
 193         unsigned int flags;
 194         int sent_ps_buffered;
 195         int queue;
 196         u32 tkip_iv32;
 197         u16 tkip_iv16;
 198 };
 199
 200 struct ieee80211_tx_stored_packet {
 201         struct sk_buff *skb;
 202         struct sk_buff **extra_frag;
 203         s8 last_frag_rate_idx;
 204         int num_extra_frag;
 205         bool last_frag_rate_ctrl_probe;
 206 };
 207
 208 struct beacon_data {
 209         u8 *head, *tail;
 210         int head_len, tail_len;
 211         int dtim_period;
 212 };
 213
 214 struct ieee80211_if_ap {
 215         struct beacon_data *beacon;
 216
 217         struct list_head vlans;
 218
 219         u8 ssid[IEEE80211_MAX_SSID_LEN];
 220         size_t ssid_len;
 221
 222         /* yes, this looks ugly, but guarantees that we can later use
 223          * bitmap_empty :)
 224          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 225         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 226         struct sk_buff_head ps_bc_buf;
 227         atomic_t num_sta_ps; /* number of stations in PS mode */
 228         int dtim_count;
 229         int num_beacons; /* number of TXed beacon frames for this BSS */
 230 };
 231
 232 struct ieee80211_if_wds {
 233         struct sta_info *sta;
 234         u8 remote_addr[ETH_ALEN];
 235 };
 236
 237 struct ieee80211_if_vlan {
 238         struct list_head list;
 239 };
 240
 241 struct mesh_stats {
 242         __u32 fwded_frames;             /* Mesh forwarded frames */
 243         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 244         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 245         atomic_t estab_plinks;
 246 };
 247
 248 #define PREQ_Q_F_START          0x1
 249 #define PREQ_Q_F_REFRESH        0x2
 250 struct mesh_preq_queue {
 251         struct list_head list;
 252         u8 dst[ETH_ALEN];
 253         u8 flags;
 254 };
 255
 256 struct mesh_config {
 257         /* Timeouts in ms */
 258         /* Mesh plink management parameters */
 259         u16 dot11MeshRetryTimeout;
 260         u16 dot11MeshConfirmTimeout;
 261         u16 dot11MeshHoldingTimeout;
 262         u16 dot11MeshMaxPeerLinks;
 263         u8  dot11MeshMaxRetries;
 264         u8  dot11MeshTTL;
 265         bool auto_open_plinks;
 266         /* HWMP parameters */
 267         u8  dot11MeshHWMPmaxPREQretries;
 268         u32 path_refresh_time;
 269         u16 min_discovery_timeout;
 270         u32 dot11MeshHWMPactivePathTimeout;
 271         u16 dot11MeshHWMPpreqMinInterval;
 272         u16 dot11MeshHWMPnetDiameterTraversalTime;
 273 };
 274
 275
 276 /* flags used in struct ieee80211_if_sta.flags */
 277 #define IEEE80211_STA_SSID_SET          BIT(0)
 278 #define IEEE80211_STA_BSSID_SET         BIT(1)
 279 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 280 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 281 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 282 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 283 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 284 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 285 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 286 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 287 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 288 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 289 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 290 /* flags for  MLME request*/
 291 #define IEEE80211_STA_REQ_SCAN 0
 292 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 293 #define IEEE80211_STA_REQ_AUTH 2
 294 #define IEEE80211_STA_REQ_RUN  3
 295
 296 /* flags used for setting mlme state */
 297 enum ieee80211_sta_mlme_state {
 298         IEEE80211_STA_MLME_DISABLED,
 299         IEEE80211_STA_MLME_DIRECT_PROBE,
 300         IEEE80211_STA_MLME_AUTHENTICATE,
 301         IEEE80211_STA_MLME_ASSOCIATE,
 302         IEEE80211_STA_MLME_ASSOCIATED,
 303         IEEE80211_STA_MLME_IBSS_SEARCH,
 304         IEEE80211_STA_MLME_IBSS_JOINED,
 305         IEEE80211_STA_MLME_MESH_UP
 306 };
 307
 308 /* bitfield of allowed auth algs */
 309 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 310 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 311 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 312
 313 struct ieee80211_if_sta {
 314         struct timer_list timer;
 315         struct work_struct work;
 316         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 317         u8 ssid[IEEE80211_MAX_SSID_LEN];
 318         enum ieee80211_sta_mlme_state state;
 319         size_t ssid_len;
 320         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 321         size_t scan_ssid_len;
 322 #ifdef CONFIG_MAC80211_MESH
 323         struct timer_list mesh_path_timer;
 324         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 325         size_t mesh_id_len;
 326         /* Active Path Selection Protocol Identifier */
 327         u8 mesh_pp_id[4];
 328         /* Active Path Selection Metric Identifier */
 329         u8 mesh_pm_id[4];
 330         /* Congestion Control Mode Identifier */
 331         u8 mesh_cc_id[4];
 332         /* Local mesh Destination Sequence Number */
 333         u32 dsn;
 334         /* Last used PREQ ID */
 335         u32 preq_id;
 336         atomic_t mpaths;
 337         /* Timestamp of last DSN update */
 338         unsigned long last_dsn_update;
 339         /* Timestamp of last DSN sent */
 340         unsigned long last_preq;
 341         struct mesh_rmc *rmc;
 342         spinlock_t mesh_preq_queue_lock;
 343         struct mesh_preq_queue preq_queue;
 344         int preq_queue_len;
 345         struct mesh_stats mshstats;
 346         struct mesh_config mshcfg;
 347         u32 mesh_seqnum;
 348         bool accepting_plinks;
 349 #endif
 350         u16 aid;
 351         u16 ap_capab, capab;
 352         u8 *extra_ie; /* to be added to the end of AssocReq */
 353         size_t extra_ie_len;
 354
 355         /* The last AssocReq/Resp IEs */
 356         u8 *assocreq_ies, *assocresp_ies;
 357         size_t assocreq_ies_len, assocresp_ies_len;
 358
 359         struct sk_buff_head skb_queue;
 360
 361         int assoc_scan_tries; /* number of scans done pre-association */
 362         int direct_probe_tries; /* retries for direct probes */
 363         int auth_tries; /* retries for auth req */
 364         int assoc_tries; /* retries for assoc req */
 365
 366         unsigned long request;
 367
 368         unsigned long last_probe;
 369
 370         unsigned int flags;
 371
 372         unsigned int auth_algs; /* bitfield of allowed auth algs */
 373         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 374         int auth_transaction;
 375
 376         unsigned long ibss_join_req;
 377         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 378         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 379
 380         int wmm_last_param_set;
 381         int num_beacons; /* number of TXed beacon frames by this STA */
 382 };
 383
 384 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 385                                                 u8 mesh_id_len, u8 *mesh_id)
 386 {
 387 #ifdef CONFIG_MAC80211_MESH
 388         ifsta->mesh_id_len = mesh_id_len;
 389         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 390 #endif
 391 }
 392
 393 #ifdef CONFIG_MAC80211_MESH
 394 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 395         do { (sta)->mshstats.name++; } while (0)
 396 #else
 397 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 398         do { } while (0)
 399 #endif
 400
 401 /* flags used in struct ieee80211_sub_if_data.flags */
 402 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 403 #define IEEE80211_SDATA_PROMISC         BIT(1)
 404 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 405 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 406 struct ieee80211_sub_if_data {
 407         struct list_head list;
 408
 409         struct wireless_dev wdev;
 410
 411         /* keys */
 412         struct list_head key_list;
 413
 414         struct net_device *dev;
 415         struct ieee80211_local *local;
 416
 417         unsigned int flags;
 418
 419         int drop_unencrypted;
 420
 421         /*
 422          * basic rates of this AP or the AP we're associated to
 423          */
 424         u64 basic_rates;
 425
 426         /* Fragment table for host-based reassembly */
 427         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 428         unsigned int fragment_next;
 429
 430 #define NUM_DEFAULT_KEYS 4
 431         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 432         struct ieee80211_key *default_key;
 433
 434         /* BSS configuration for this interface. */
 435         struct ieee80211_bss_conf bss_conf;
 436
 437         /*
 438          * AP this belongs to: self in AP mode and
 439          * corresponding AP in VLAN mode, NULL for
 440          * all others (might be needed later in IBSS)
 441          */
 442         struct ieee80211_if_ap *bss;
 443
 444         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 445         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 446
 447         union {
 448                 struct ieee80211_if_ap ap;
 449                 struct ieee80211_if_wds wds;
 450                 struct ieee80211_if_vlan vlan;
 451                 struct ieee80211_if_sta sta;
 452                 u32 mntr_flags;
 453         } u;
 454
 455 #ifdef CONFIG_MAC80211_DEBUGFS
 456         struct dentry *debugfsdir;
 457         union {
 458                 struct {
 459                         struct dentry *drop_unencrypted;
 460                         struct dentry *state;
 461                         struct dentry *bssid;
 462                         struct dentry *prev_bssid;
 463                         struct dentry *ssid_len;
 464                         struct dentry *aid;
 465                         struct dentry *ap_capab;
 466                         struct dentry *capab;
 467                         struct dentry *extra_ie_len;
 468                         struct dentry *auth_tries;
 469                         struct dentry *assoc_tries;
 470                         struct dentry *auth_algs;
 471                         struct dentry *auth_alg;
 472                         struct dentry *auth_transaction;
 473                         struct dentry *flags;
 474                         struct dentry *num_beacons_sta;
 475                         struct dentry *force_unicast_rateidx;
 476                         struct dentry *max_ratectrl_rateidx;
 477                 } sta;
 478                 struct {
 479                         struct dentry *drop_unencrypted;
 480                         struct dentry *num_sta_ps;
 481                         struct dentry *dtim_count;
 482                         struct dentry *num_beacons;
 483                         struct dentry *force_unicast_rateidx;
 484                         struct dentry *max_ratectrl_rateidx;
 485                         struct dentry *num_buffered_multicast;
 486                 } ap;
 487                 struct {
 488                         struct dentry *drop_unencrypted;
 489                         struct dentry *peer;
 490                         struct dentry *force_unicast_rateidx;
 491                         struct dentry *max_ratectrl_rateidx;
 492                 } wds;
 493                 struct {
 494                         struct dentry *drop_unencrypted;
 495                         struct dentry *force_unicast_rateidx;
 496                         struct dentry *max_ratectrl_rateidx;
 497                 } vlan;
 498                 struct {
 499                         struct dentry *mode;
 500                 } monitor;
 501                 struct dentry *default_key;
 502         } debugfs;
 503
 504 #ifdef CONFIG_MAC80211_MESH
 505         struct dentry *mesh_stats_dir;
 506         struct {
 507                 struct dentry *fwded_frames;
 508                 struct dentry *dropped_frames_ttl;
 509                 struct dentry *dropped_frames_no_route;
 510                 struct dentry *estab_plinks;
 511                 struct timer_list mesh_path_timer;
 512         } mesh_stats;
 513
 514         struct dentry *mesh_config_dir;
 515         struct {
 516                 struct dentry *dot11MeshRetryTimeout;
 517                 struct dentry *dot11MeshConfirmTimeout;
 518                 struct dentry *dot11MeshHoldingTimeout;
 519                 struct dentry *dot11MeshMaxRetries;
 520                 struct dentry *dot11MeshTTL;
 521                 struct dentry *auto_open_plinks;
 522                 struct dentry *dot11MeshMaxPeerLinks;
 523                 struct dentry *dot11MeshHWMPactivePathTimeout;
 524                 struct dentry *dot11MeshHWMPpreqMinInterval;
 525                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 526                 struct dentry *dot11MeshHWMPmaxPREQretries;
 527                 struct dentry *path_refresh_time;
 528                 struct dentry *min_discovery_timeout;
 529         } mesh_config;
 530 #endif
 531
 532 #endif
 533         /* must be last, dynamically sized area in this! */
 534         struct ieee80211_vif vif;
 535 };
 536
 537 static inline
 538 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 539 {
 540         return container_of(p, struct ieee80211_sub_if_data, vif);
 541 }
 542
 543 enum {
 544         IEEE80211_RX_MSG        = 1,
 545         IEEE80211_TX_STATUS_MSG = 2,
 546         IEEE80211_DELBA_MSG     = 3,
 547         IEEE80211_ADDBA_MSG     = 4,
 548 };
 549
 550 /* maximum number of hardware queues we support. */
 551 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 552
 553 struct ieee80211_local {
 554         /* embed the driver visible part.
 555          * don't cast (use the static inlines below), but we keep
 556          * it first anyway so they become a no-op */
 557         struct ieee80211_hw hw;
 558
 559         const struct ieee80211_ops *ops;
 560
 561         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 562
 563         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 564         int open_count;
 565         int monitors, cooked_mntrs;
 566         /* number of interfaces with corresponding FIF_ flags */
 567         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 568         unsigned int filter_flags; /* FIF_* */
 569         struct iw_statistics wstats;
 570         u8 wstats_flags;
 571         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 572         int tx_headroom; /* required headroom for hardware/radiotap */
 573
 574         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 575          * added to skb_queue will be processed, but frames in
 576          * skb_queue_unreliable may be dropped if the total length of these
 577          * queues increases over the limit. */
 578 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 579         struct tasklet_struct tasklet;
 580         struct sk_buff_head skb_queue;
 581         struct sk_buff_head skb_queue_unreliable;
 582
 583         /* Station data */
 584         /*
 585          * The lock only protects the list, hash, timer and counter
 586          * against manipulation, reads are done in RCU. Additionally,
 587          * the lock protects each BSS's TIM bitmap.
 588          */
 589         spinlock_t sta_lock;
 590         unsigned long num_sta;
 591         struct list_head sta_list;
 592         struct list_head sta_flush_list;
 593         struct work_struct sta_flush_work;
 594         struct sta_info *sta_hash[STA_HASH_SIZE];
 595         struct timer_list sta_cleanup;
 596
 597         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 598         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 599         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 600         struct tasklet_struct tx_pending_tasklet;
 601
 602         /* number of interfaces with corresponding IFF_ flags */
 603         atomic_t iff_allmultis, iff_promiscs;
 604
 605         struct rate_control_ref *rate_ctrl;
 606
 607         int rts_threshold;
 608         int fragmentation_threshold;
 609         int short_retry_limit; /* dot11ShortRetryLimit */
 610         int long_retry_limit; /* dot11LongRetryLimit */
 611
 612         struct crypto_blkcipher *wep_tx_tfm;
 613         struct crypto_blkcipher *wep_rx_tfm;
 614         u32 wep_iv;
 615
 616         int bridge_packets; /* bridge packets between associated stations and
 617                              * deliver multicast frames both back to wireless
 618                              * media and to the local net stack */
 619
 620         struct list_head interfaces;
 621
 622         /*
 623          * Key lock, protects sdata's key_list and sta_info's
 624          * key pointers (write access, they're RCU.)
 625          */
 626         spinlock_t key_lock;
 627
 628
 629         bool sta_sw_scanning;
 630         bool sta_hw_scanning;
 631         int scan_channel_idx;
 632         enum ieee80211_band scan_band;
 633
 634         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 635         unsigned long last_scan_completed;
 636         struct delayed_work scan_work;
 637         struct net_device *scan_dev;
 638         struct ieee80211_channel *oper_channel, *scan_channel;
 639         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 640         size_t scan_ssid_len;
 641         struct list_head sta_bss_list;
 642         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 643         spinlock_t sta_bss_lock;
 644
 645         /* SNMP counters */
 646         /* dot11CountersTable */
 647         u32 dot11TransmittedFragmentCount;
 648         u32 dot11MulticastTransmittedFrameCount;
 649         u32 dot11FailedCount;
 650         u32 dot11RetryCount;
 651         u32 dot11MultipleRetryCount;
 652         u32 dot11FrameDuplicateCount;
 653         u32 dot11ReceivedFragmentCount;
 654         u32 dot11MulticastReceivedFrameCount;
 655         u32 dot11TransmittedFrameCount;
 656         u32 dot11WEPUndecryptableCount;
 657
 658 #ifdef CONFIG_MAC80211_LEDS
 659         int tx_led_counter, rx_led_counter;
 660         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 661         char tx_led_name[32], rx_led_name[32],
 662              assoc_led_name[32], radio_led_name[32];
 663 #endif
 664
 665 #ifdef CONFIG_MAC80211_DEBUGFS
 666         struct work_struct sta_debugfs_add;
 667 #endif
 668
 669 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 670         /* TX/RX handler statistics */
 671         unsigned int tx_handlers_drop;
 672         unsigned int tx_handlers_queued;
 673         unsigned int tx_handlers_drop_unencrypted;
 674         unsigned int tx_handlers_drop_fragment;
 675         unsigned int tx_handlers_drop_wep;
 676         unsigned int tx_handlers_drop_not_assoc;
 677         unsigned int tx_handlers_drop_unauth_port;
 678         unsigned int rx_handlers_drop;
 679         unsigned int rx_handlers_queued;
 680         unsigned int rx_handlers_drop_nullfunc;
 681         unsigned int rx_handlers_drop_defrag;
 682         unsigned int rx_handlers_drop_short;
 683         unsigned int rx_handlers_drop_passive_scan;
 684         unsigned int tx_expand_skb_head;
 685         unsigned int tx_expand_skb_head_cloned;
 686         unsigned int rx_expand_skb_head;
 687         unsigned int rx_expand_skb_head2;
 688         unsigned int rx_handlers_fragments;
 689         unsigned int tx_status_drop;
 690 #define I802_DEBUG_INC(c) (c)++
 691 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 692 #define I802_DEBUG_INC(c) do { } while (0)
 693 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 694
 695
 696         int total_ps_buffered; /* total number of all buffered unicast and
 697                                 * multicast packets for power saving stations
 698                                 */
 699         int wifi_wme_noack_test;
 700         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 701
 702 #ifdef CONFIG_MAC80211_DEBUGFS
 703         struct local_debugfsdentries {
 704                 struct dentry *frequency;
 705                 struct dentry *antenna_sel_tx;
 706                 struct dentry *antenna_sel_rx;
 707                 struct dentry *bridge_packets;
 708                 struct dentry *rts_threshold;
 709                 struct dentry *fragmentation_threshold;
 710                 struct dentry *short_retry_limit;
 711                 struct dentry *long_retry_limit;
 712                 struct dentry *total_ps_buffered;
 713                 struct dentry *wep_iv;
 714                 struct dentry *statistics;
 715                 struct local_debugfsdentries_statsdentries {
 716                         struct dentry *transmitted_fragment_count;
 717                         struct dentry *multicast_transmitted_frame_count;
 718                         struct dentry *failed_count;
 719                         struct dentry *retry_count;
 720                         struct dentry *multiple_retry_count;
 721                         struct dentry *frame_duplicate_count;
 722                         struct dentry *received_fragment_count;
 723                         struct dentry *multicast_received_frame_count;
 724                         struct dentry *transmitted_frame_count;
 725                         struct dentry *wep_undecryptable_count;
 726                         struct dentry *num_scans;
 727 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 728                         struct dentry *tx_handlers_drop;
 729                         struct dentry *tx_handlers_queued;
 730                         struct dentry *tx_handlers_drop_unencrypted;
 731                         struct dentry *tx_handlers_drop_fragment;
 732                         struct dentry *tx_handlers_drop_wep;
 733                         struct dentry *tx_handlers_drop_not_assoc;
 734                         struct dentry *tx_handlers_drop_unauth_port;
 735                         struct dentry *rx_handlers_drop;
 736                         struct dentry *rx_handlers_queued;
 737                         struct dentry *rx_handlers_drop_nullfunc;
 738                         struct dentry *rx_handlers_drop_defrag;
 739                         struct dentry *rx_handlers_drop_short;
 740                         struct dentry *rx_handlers_drop_passive_scan;
 741                         struct dentry *tx_expand_skb_head;
 742                         struct dentry *tx_expand_skb_head_cloned;
 743                         struct dentry *rx_expand_skb_head;
 744                         struct dentry *rx_expand_skb_head2;
 745                         struct dentry *rx_handlers_fragments;
 746                         struct dentry *tx_status_drop;
 747 #endif
 748                         struct dentry *dot11ACKFailureCount;
 749                         struct dentry *dot11RTSFailureCount;
 750                         struct dentry *dot11FCSErrorCount;
 751                         struct dentry *dot11RTSSuccessCount;
 752                 } stats;
 753                 struct dentry *stations;
 754                 struct dentry *keys;
 755         } debugfs;
 756 #endif
 757 };
 758
 759 static inline struct ieee80211_sub_if_data *
 760 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 761 {
 762         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 763
 764         BUG_ON(!local || local->mdev == dev);
 765
 766         return netdev_priv(dev);
 767 }
 768
 769 /* this struct represents 802.11n's RA/TID combination */
 770 struct ieee80211_ra_tid {
 771         u8 ra[ETH_ALEN];
 772         u16 tid;
 773 };
 774
 775 /* Parsed Information Elements */
 776 struct ieee802_11_elems {
 777         u8 *ie_start;
 778         size_t total_len;
 779
 780         /* pointers to IEs */
 781         u8 *ssid;
 782         u8 *supp_rates;
 783         u8 *fh_params;
 784         u8 *ds_params;
 785         u8 *cf_params;
 786         u8 *tim;
 787         u8 *ibss_params;
 788         u8 *challenge;
 789         u8 *wpa;
 790         u8 *rsn;
 791         u8 *erp_info;
 792         u8 *ext_supp_rates;
 793         u8 *wmm_info;
 794         u8 *wmm_param;
 795         u8 *ht_cap_elem;
 796         u8 *ht_info_elem;
 797         u8 *mesh_config;
 798         u8 *mesh_id;
 799         u8 *peer_link;
 800         u8 *preq;
 801         u8 *prep;
 802         u8 *perr;
 803         u8 *ch_switch_elem;
 804         u8 *country_elem;
 805         u8 *pwr_constr_elem;
 806         u8 *quiet_elem;         /* first quite element */
 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 ht_cap_elem_len;
 824         u8 ht_info_elem_len;
 825         u8 mesh_config_len;
 826         u8 mesh_id_len;
 827         u8 peer_link_len;
 828         u8 preq_len;
 829         u8 prep_len;
 830         u8 perr_len;
 831         u8 ch_switch_elem_len;
 832         u8 country_elem_len;
 833         u8 pwr_constr_elem_len;
 834         u8 quiet_elem_len;
 835         u8 num_of_quiet_elem;   /* can be more the one */
 836 };
 837
 838 static inline struct ieee80211_local *hw_to_local(
 839         struct ieee80211_hw *hw)
 840 {
 841         return container_of(hw, struct ieee80211_local, hw);
 842 }
 843
 844 static inline struct ieee80211_hw *local_to_hw(
 845         struct ieee80211_local *local)
 846 {
 847         return &local->hw;
 848 }
 849
 850 struct sta_attribute {
 851         struct attribute attr;
 852         ssize_t (*show)(const struct sta_info *, char *buf);
 853         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 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 /* ieee80211.c */
 864 int ieee80211_hw_config(struct ieee80211_local *local);
 865 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 866 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 867 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 868                         struct ieee80211_ht_info *req_ht_cap,
 869                         struct ieee80211_ht_bss_info *req_bss_cap);
 870
 871 /* ieee80211_ioctl.c */
 872 extern const struct iw_handler_def ieee80211_iw_handler_def;
 873 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
 874
 875 /* ieee80211_sta.c */
 876 void ieee80211_sta_timer(unsigned long data);
 877 void ieee80211_sta_work(struct work_struct *work);
 878 void ieee80211_sta_scan_work(struct work_struct *work);
 879 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 880                            struct ieee80211_rx_status *rx_status);
 881 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 882 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 883 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 884 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len);
 885 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 886                             struct ieee80211_if_sta *ifsta);
 887 int ieee80211_sta_scan_results(struct ieee80211_local *local,
 888                                struct iw_request_info *info,
 889                                char *buf, size_t len);
 890 ieee80211_rx_result ieee80211_sta_rx_scan(
 891         struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 892         struct ieee80211_rx_status *rx_status);
 893 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 894 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 895 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len);
 896 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 897                                         struct sk_buff *skb, u8 *bssid,
 898                                         u8 *addr, u64 supp_rates);
 899 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 900 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 901 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 902                                       u32 changed);
 903 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 904 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 905                                    struct ieee80211_ht_info *ht_info);
 906 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 907                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 908                         struct ieee80211_ht_bss_info *bss_info);
 909 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
 910                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 911                                   u16 agg_size, u16 timeout);
 912 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
 913                                 u16 initiator, u16 reason_code);
 914 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 915
 916 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 917                                 u16 tid, u16 initiator, u16 reason);
 918 void sta_addba_resp_timer_expired(unsigned long data);
 919 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 920 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 921                             struct ieee802_11_elems *elems,
 922                             enum ieee80211_band band);
 923 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 924                 int encrypt);
 925 void ieee802_11_parse_elems(u8 *start, size_t len,
 926                                    struct ieee802_11_elems *elems);
 927
 928 #ifdef CONFIG_MAC80211_MESH
 929 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
 930 #else
 931 static inline void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 932 {}
 933 #endif
 934
 935 /* interface handling */
 936 void ieee80211_if_setup(struct net_device *dev);
 937 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 938                      struct net_device **new_dev, enum ieee80211_if_types type,
 939                      struct vif_params *params);
 940 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 941                              enum ieee80211_if_types type);
 942 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 943 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 944
 945 /* tx handling */
 946 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 947 void ieee80211_tx_pending(unsigned long data);
 948 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 949 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 950 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 951
 952 /* utility functions/constants */
 953 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 954 extern const unsigned char rfc1042_header[6];
 955 extern const unsigned char bridge_tunnel_header[6];
 956 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 957                         enum ieee80211_if_types type);
 958 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 959                              int rate, int erp, int short_preamble);
 960 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
 961                                      struct ieee80211_hdr *hdr);
 962
 963 #ifdef CONFIG_MAC80211_NOINLINE
 964 #define debug_noinline noinline
 965 #else
 966 #define debug_noinline
 967 #endif
 968
 969 #endif /* IEEE80211_I_H */