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 *wpa_ie;
  83         size_t wpa_ie_len;
  84         u8 *rsn_ie;
  85         size_t rsn_ie_len;
  86         u8 *wmm_ie;
  87         size_t wmm_ie_len;
  88         u8 *ht_ie;
  89         size_t ht_ie_len;
  90         u8 *ht_add_ie;
  91         size_t ht_add_ie_len;
  92 #ifdef CONFIG_MAC80211_MESH
  93         u8 *mesh_id;
  94         size_t mesh_id_len;
  95         u8 *mesh_cfg;
  96 #endif
  97 #define IEEE80211_MAX_SUPP_RATES 32
  98         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  99         size_t supp_rates_len;
 100         u64 timestamp;
 101         int beacon_int;
 102
 103         bool probe_resp;
 104         unsigned long last_update;
 105
 106         /* during assocation, we save an ERP value from a probe response so
 107          * that we can feed ERP info to the driver when handling the
 108          * association completes. these fields probably won't be up-to-date
 109          * otherwise, you probably don't want to use them. */
 110         int has_erp_value;
 111         u8 erp_value;
 112 };
 113
 114 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 115 {
 116 #ifdef CONFIG_MAC80211_MESH
 117         return bss->mesh_cfg;
 118 #endif
 119         return NULL;
 120 }
 121
 122 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 123 {
 124 #ifdef CONFIG_MAC80211_MESH
 125         return bss->mesh_id;
 126 #endif
 127         return NULL;
 128 }
 129
 130 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 131 {
 132 #ifdef CONFIG_MAC80211_MESH
 133         return bss->mesh_id_len;
 134 #endif
 135         return 0;
 136 }
 137
 138
 139 typedef unsigned __bitwise__ ieee80211_tx_result;
 140 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 141 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 142 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 143
 144 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 145 #define IEEE80211_TX_UNICAST            BIT(1)
 146 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 147 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 148
 149 struct ieee80211_tx_data {
 150         struct sk_buff *skb;
 151         struct net_device *dev;
 152         struct ieee80211_local *local;
 153         struct ieee80211_sub_if_data *sdata;
 154         struct sta_info *sta;
 155         struct ieee80211_key *key;
 156
 157         struct ieee80211_channel *channel;
 158         s8 rate_idx;
 159         /* use this rate (if set) for last fragment; rate can
 160          * be set to lower rate for the first fragments, e.g.,
 161          * when using CTS protection with IEEE 802.11g. */
 162         s8 last_frag_rate_idx;
 163
 164         /* Extra fragments (in addition to the first fragment
 165          * in skb) */
 166         struct sk_buff **extra_frag;
 167         int num_extra_frag;
 168
 169         u16 ethertype;
 170         unsigned int flags;
 171 };
 172
 173
 174 typedef unsigned __bitwise__ ieee80211_rx_result;
 175 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 176 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 177 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 178 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 179
 180 #define IEEE80211_RX_IN_SCAN            BIT(0)
 181 /* frame is destined to interface currently processed (incl. multicast frames) */
 182 #define IEEE80211_RX_RA_MATCH           BIT(1)
 183 #define IEEE80211_RX_AMSDU              BIT(2)
 184 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 185 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 186
 187 struct ieee80211_rx_data {
 188         struct sk_buff *skb;
 189         struct net_device *dev;
 190         struct ieee80211_local *local;
 191         struct ieee80211_sub_if_data *sdata;
 192         struct sta_info *sta;
 193         struct ieee80211_key *key;
 194         struct ieee80211_rx_status *status;
 195         struct ieee80211_rate *rate;
 196
 197         u16 ethertype;
 198         unsigned int flags;
 199         int sent_ps_buffered;
 200         int queue;
 201         u32 tkip_iv32;
 202         u16 tkip_iv16;
 203 };
 204
 205 struct ieee80211_tx_stored_packet {
 206         struct sk_buff *skb;
 207         struct sk_buff **extra_frag;
 208         s8 last_frag_rate_idx;
 209         int num_extra_frag;
 210         bool last_frag_rate_ctrl_probe;
 211 };
 212
 213 struct beacon_data {
 214         u8 *head, *tail;
 215         int head_len, tail_len;
 216         int dtim_period;
 217 };
 218
 219 struct ieee80211_if_ap {
 220         struct beacon_data *beacon;
 221
 222         struct list_head vlans;
 223
 224         u8 ssid[IEEE80211_MAX_SSID_LEN];
 225         size_t ssid_len;
 226
 227         /* yes, this looks ugly, but guarantees that we can later use
 228          * bitmap_empty :)
 229          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 230         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 231         struct sk_buff_head ps_bc_buf;
 232         atomic_t num_sta_ps; /* number of stations in PS mode */
 233         int dtim_count;
 234         int num_beacons; /* number of TXed beacon frames for this BSS */
 235 };
 236
 237 struct ieee80211_if_wds {
 238         struct sta_info *sta;
 239         u8 remote_addr[ETH_ALEN];
 240 };
 241
 242 struct ieee80211_if_vlan {
 243         struct list_head list;
 244 };
 245
 246 struct mesh_stats {
 247         __u32 fwded_frames;             /* Mesh forwarded frames */
 248         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 249         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 250         atomic_t estab_plinks;
 251 };
 252
 253 #define PREQ_Q_F_START          0x1
 254 #define PREQ_Q_F_REFRESH        0x2
 255 struct mesh_preq_queue {
 256         struct list_head list;
 257         u8 dst[ETH_ALEN];
 258         u8 flags;
 259 };
 260
 261 struct mesh_config {
 262         /* Timeouts in ms */
 263         /* Mesh plink management parameters */
 264         u16 dot11MeshRetryTimeout;
 265         u16 dot11MeshConfirmTimeout;
 266         u16 dot11MeshHoldingTimeout;
 267         u16 dot11MeshMaxPeerLinks;
 268         u8  dot11MeshMaxRetries;
 269         u8  dot11MeshTTL;
 270         bool auto_open_plinks;
 271         /* HWMP parameters */
 272         u8  dot11MeshHWMPmaxPREQretries;
 273         u32 path_refresh_time;
 274         u16 min_discovery_timeout;
 275         u32 dot11MeshHWMPactivePathTimeout;
 276         u16 dot11MeshHWMPpreqMinInterval;
 277         u16 dot11MeshHWMPnetDiameterTraversalTime;
 278 };
 279
 280
 281 /* flags used in struct ieee80211_if_sta.flags */
 282 #define IEEE80211_STA_SSID_SET          BIT(0)
 283 #define IEEE80211_STA_BSSID_SET         BIT(1)
 284 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 285 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 286 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 287 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 288 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 289 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 290 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 291 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 292 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 293 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 294 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 295 struct ieee80211_if_sta {
 296         struct timer_list timer;
 297         struct work_struct work;
 298         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 299         u8 ssid[IEEE80211_MAX_SSID_LEN];
 300         enum {
 301                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 302                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 303                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED,
 304                 IEEE80211_MESH_UP
 305         } state;
 306         size_t ssid_len;
 307         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 308         size_t scan_ssid_len;
 309 #ifdef CONFIG_MAC80211_MESH
 310         struct timer_list mesh_path_timer;
 311         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 312         size_t mesh_id_len;
 313         /* Active Path Selection Protocol Identifier */
 314         u8 mesh_pp_id[4];
 315         /* Active Path Selection Metric Identifier */
 316         u8 mesh_pm_id[4];
 317         /* Congestion Control Mode Identifier */
 318         u8 mesh_cc_id[4];
 319         /* Local mesh Destination Sequence Number */
 320         u32 dsn;
 321         /* Last used PREQ ID */
 322         u32 preq_id;
 323         atomic_t mpaths;
 324         /* Timestamp of last DSN update */
 325         unsigned long last_dsn_update;
 326         /* Timestamp of last DSN sent */
 327         unsigned long last_preq;
 328         struct mesh_rmc *rmc;
 329         spinlock_t mesh_preq_queue_lock;
 330         struct mesh_preq_queue preq_queue;
 331         int preq_queue_len;
 332         struct mesh_stats mshstats;
 333         struct mesh_config mshcfg;
 334         u32 mesh_seqnum;
 335         bool accepting_plinks;
 336 #endif
 337         u16 aid;
 338         u16 ap_capab, capab;
 339         u8 *extra_ie; /* to be added to the end of AssocReq */
 340         size_t extra_ie_len;
 341
 342         /* The last AssocReq/Resp IEs */
 343         u8 *assocreq_ies, *assocresp_ies;
 344         size_t assocreq_ies_len, assocresp_ies_len;
 345
 346         struct sk_buff_head skb_queue;
 347
 348         int auth_tries, assoc_tries;
 349
 350         unsigned long request;
 351
 352         unsigned long last_probe;
 353
 354         unsigned int flags;
 355 #define IEEE80211_STA_REQ_SCAN 0
 356 #define IEEE80211_STA_REQ_AUTH 1
 357 #define IEEE80211_STA_REQ_RUN  2
 358
 359 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 360 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 361 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 362         unsigned int auth_algs; /* bitfield of allowed auth algs */
 363         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 364         int auth_transaction;
 365
 366         unsigned long ibss_join_req;
 367         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 368         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 369
 370         int wmm_last_param_set;
 371         int num_beacons; /* number of TXed beacon frames by this STA */
 372 };
 373
 374 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 375                                                 u8 mesh_id_len, u8 *mesh_id)
 376 {
 377 #ifdef CONFIG_MAC80211_MESH
 378         ifsta->mesh_id_len = mesh_id_len;
 379         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 380 #endif
 381 }
 382
 383 #ifdef CONFIG_MAC80211_MESH
 384 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 385         do { (sta)->mshstats.name++; } while (0)
 386 #else
 387 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 388         do { } while (0)
 389 #endif
 390
 391 /* flags used in struct ieee80211_sub_if_data.flags */
 392 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 393 #define IEEE80211_SDATA_PROMISC         BIT(1)
 394 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 395 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 396 struct ieee80211_sub_if_data {
 397         struct list_head list;
 398
 399         struct wireless_dev wdev;
 400
 401         /* keys */
 402         struct list_head key_list;
 403
 404         struct net_device *dev;
 405         struct ieee80211_local *local;
 406
 407         unsigned int flags;
 408
 409         int drop_unencrypted;
 410
 411         /*
 412          * basic rates of this AP or the AP we're associated to
 413          */
 414         u64 basic_rates;
 415
 416         /* Fragment table for host-based reassembly */
 417         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 418         unsigned int fragment_next;
 419
 420 #define NUM_DEFAULT_KEYS 4
 421         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 422         struct ieee80211_key *default_key;
 423
 424         /* BSS configuration for this interface. */
 425         struct ieee80211_bss_conf bss_conf;
 426
 427         /*
 428          * AP this belongs to: self in AP mode and
 429          * corresponding AP in VLAN mode, NULL for
 430          * all others (might be needed later in IBSS)
 431          */
 432         struct ieee80211_if_ap *bss;
 433
 434         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 435         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 436
 437         union {
 438                 struct ieee80211_if_ap ap;
 439                 struct ieee80211_if_wds wds;
 440                 struct ieee80211_if_vlan vlan;
 441                 struct ieee80211_if_sta sta;
 442                 u32 mntr_flags;
 443         } u;
 444
 445 #ifdef CONFIG_MAC80211_DEBUGFS
 446         struct dentry *debugfsdir;
 447         union {
 448                 struct {
 449                         struct dentry *drop_unencrypted;
 450                         struct dentry *state;
 451                         struct dentry *bssid;
 452                         struct dentry *prev_bssid;
 453                         struct dentry *ssid_len;
 454                         struct dentry *aid;
 455                         struct dentry *ap_capab;
 456                         struct dentry *capab;
 457                         struct dentry *extra_ie_len;
 458                         struct dentry *auth_tries;
 459                         struct dentry *assoc_tries;
 460                         struct dentry *auth_algs;
 461                         struct dentry *auth_alg;
 462                         struct dentry *auth_transaction;
 463                         struct dentry *flags;
 464                         struct dentry *num_beacons_sta;
 465                 } sta;
 466                 struct {
 467                         struct dentry *drop_unencrypted;
 468                         struct dentry *num_sta_ps;
 469                         struct dentry *dtim_count;
 470                         struct dentry *num_beacons;
 471                         struct dentry *force_unicast_rateidx;
 472                         struct dentry *max_ratectrl_rateidx;
 473                         struct dentry *num_buffered_multicast;
 474                 } ap;
 475                 struct {
 476                         struct dentry *drop_unencrypted;
 477                         struct dentry *peer;
 478                 } wds;
 479                 struct {
 480                         struct dentry *drop_unencrypted;
 481                 } vlan;
 482                 struct {
 483                         struct dentry *mode;
 484                 } monitor;
 485                 struct dentry *default_key;
 486         } debugfs;
 487
 488 #ifdef CONFIG_MAC80211_MESH
 489         struct dentry *mesh_stats_dir;
 490         struct {
 491                 struct dentry *fwded_frames;
 492                 struct dentry *dropped_frames_ttl;
 493                 struct dentry *dropped_frames_no_route;
 494                 struct dentry *estab_plinks;
 495                 struct timer_list mesh_path_timer;
 496         } mesh_stats;
 497
 498         struct dentry *mesh_config_dir;
 499         struct {
 500                 struct dentry *dot11MeshRetryTimeout;
 501                 struct dentry *dot11MeshConfirmTimeout;
 502                 struct dentry *dot11MeshHoldingTimeout;
 503                 struct dentry *dot11MeshMaxRetries;
 504                 struct dentry *dot11MeshTTL;
 505                 struct dentry *auto_open_plinks;
 506                 struct dentry *dot11MeshMaxPeerLinks;
 507                 struct dentry *dot11MeshHWMPactivePathTimeout;
 508                 struct dentry *dot11MeshHWMPpreqMinInterval;
 509                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 510                 struct dentry *dot11MeshHWMPmaxPREQretries;
 511                 struct dentry *path_refresh_time;
 512                 struct dentry *min_discovery_timeout;
 513         } mesh_config;
 514 #endif
 515
 516 #endif
 517         /* must be last, dynamically sized area in this! */
 518         struct ieee80211_vif vif;
 519 };
 520
 521 static inline
 522 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 523 {
 524         return container_of(p, struct ieee80211_sub_if_data, vif);
 525 }
 526
 527 enum {
 528         IEEE80211_RX_MSG        = 1,
 529         IEEE80211_TX_STATUS_MSG = 2,
 530         IEEE80211_DELBA_MSG     = 3,
 531         IEEE80211_ADDBA_MSG     = 4,
 532 };
 533
 534 /* maximum number of hardware queues we support. */
 535 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 536
 537 struct ieee80211_local {
 538         /* embed the driver visible part.
 539          * don't cast (use the static inlines below), but we keep
 540          * it first anyway so they become a no-op */
 541         struct ieee80211_hw hw;
 542
 543         const struct ieee80211_ops *ops;
 544
 545         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 546
 547         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 548         int open_count;
 549         int monitors, cooked_mntrs;
 550         /* number of interfaces with corresponding FIF_ flags */
 551         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 552         unsigned int filter_flags; /* FIF_* */
 553         struct iw_statistics wstats;
 554         u8 wstats_flags;
 555         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 556         int tx_headroom; /* required headroom for hardware/radiotap */
 557
 558         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 559          * added to skb_queue will be processed, but frames in
 560          * skb_queue_unreliable may be dropped if the total length of these
 561          * queues increases over the limit. */
 562 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 563         struct tasklet_struct tasklet;
 564         struct sk_buff_head skb_queue;
 565         struct sk_buff_head skb_queue_unreliable;
 566
 567         /* Station data */
 568         /*
 569          * The lock only protects the list, hash, timer and counter
 570          * against manipulation, reads are done in RCU. Additionally,
 571          * the lock protects each BSS's TIM bitmap.
 572          */
 573         spinlock_t sta_lock;
 574         unsigned long num_sta;
 575         struct list_head sta_list;
 576         struct list_head sta_flush_list;
 577         struct work_struct sta_flush_work;
 578         struct sta_info *sta_hash[STA_HASH_SIZE];
 579         struct timer_list sta_cleanup;
 580
 581         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 582         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 583         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 584         struct tasklet_struct tx_pending_tasklet;
 585
 586         /* number of interfaces with corresponding IFF_ flags */
 587         atomic_t iff_allmultis, iff_promiscs;
 588
 589         struct rate_control_ref *rate_ctrl;
 590
 591         int rts_threshold;
 592         int fragmentation_threshold;
 593         int short_retry_limit; /* dot11ShortRetryLimit */
 594         int long_retry_limit; /* dot11LongRetryLimit */
 595
 596         struct crypto_blkcipher *wep_tx_tfm;
 597         struct crypto_blkcipher *wep_rx_tfm;
 598         u32 wep_iv;
 599
 600         int bridge_packets; /* bridge packets between associated stations and
 601                              * deliver multicast frames both back to wireless
 602                              * media and to the local net stack */
 603
 604         struct list_head interfaces;
 605
 606         /*
 607          * Key lock, protects sdata's key_list and sta_info's
 608          * key pointers (write access, they're RCU.)
 609          */
 610         spinlock_t key_lock;
 611
 612
 613         bool sta_sw_scanning;
 614         bool sta_hw_scanning;
 615         int scan_channel_idx;
 616         enum ieee80211_band scan_band;
 617
 618         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 619         unsigned long last_scan_completed;
 620         struct delayed_work scan_work;
 621         struct net_device *scan_dev;
 622         struct ieee80211_channel *oper_channel, *scan_channel;
 623         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 624         size_t scan_ssid_len;
 625         struct list_head sta_bss_list;
 626         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 627         spinlock_t sta_bss_lock;
 628
 629         /* SNMP counters */
 630         /* dot11CountersTable */
 631         u32 dot11TransmittedFragmentCount;
 632         u32 dot11MulticastTransmittedFrameCount;
 633         u32 dot11FailedCount;
 634         u32 dot11RetryCount;
 635         u32 dot11MultipleRetryCount;
 636         u32 dot11FrameDuplicateCount;
 637         u32 dot11ReceivedFragmentCount;
 638         u32 dot11MulticastReceivedFrameCount;
 639         u32 dot11TransmittedFrameCount;
 640         u32 dot11WEPUndecryptableCount;
 641
 642 #ifdef CONFIG_MAC80211_LEDS
 643         int tx_led_counter, rx_led_counter;
 644         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 645         char tx_led_name[32], rx_led_name[32],
 646              assoc_led_name[32], radio_led_name[32];
 647 #endif
 648
 649 #ifdef CONFIG_MAC80211_DEBUGFS
 650         struct work_struct sta_debugfs_add;
 651 #endif
 652
 653 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 654         /* TX/RX handler statistics */
 655         unsigned int tx_handlers_drop;
 656         unsigned int tx_handlers_queued;
 657         unsigned int tx_handlers_drop_unencrypted;
 658         unsigned int tx_handlers_drop_fragment;
 659         unsigned int tx_handlers_drop_wep;
 660         unsigned int tx_handlers_drop_not_assoc;
 661         unsigned int tx_handlers_drop_unauth_port;
 662         unsigned int rx_handlers_drop;
 663         unsigned int rx_handlers_queued;
 664         unsigned int rx_handlers_drop_nullfunc;
 665         unsigned int rx_handlers_drop_defrag;
 666         unsigned int rx_handlers_drop_short;
 667         unsigned int rx_handlers_drop_passive_scan;
 668         unsigned int tx_expand_skb_head;
 669         unsigned int tx_expand_skb_head_cloned;
 670         unsigned int rx_expand_skb_head;
 671         unsigned int rx_expand_skb_head2;
 672         unsigned int rx_handlers_fragments;
 673         unsigned int tx_status_drop;
 674 #define I802_DEBUG_INC(c) (c)++
 675 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 676 #define I802_DEBUG_INC(c) do { } while (0)
 677 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 678
 679
 680         int total_ps_buffered; /* total number of all buffered unicast and
 681                                 * multicast packets for power saving stations
 682                                 */
 683         int wifi_wme_noack_test;
 684         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 685
 686 #ifdef CONFIG_MAC80211_DEBUGFS
 687         struct local_debugfsdentries {
 688                 struct dentry *frequency;
 689                 struct dentry *antenna_sel_tx;
 690                 struct dentry *antenna_sel_rx;
 691                 struct dentry *bridge_packets;
 692                 struct dentry *rts_threshold;
 693                 struct dentry *fragmentation_threshold;
 694                 struct dentry *short_retry_limit;
 695                 struct dentry *long_retry_limit;
 696                 struct dentry *total_ps_buffered;
 697                 struct dentry *wep_iv;
 698                 struct dentry *statistics;
 699                 struct local_debugfsdentries_statsdentries {
 700                         struct dentry *transmitted_fragment_count;
 701                         struct dentry *multicast_transmitted_frame_count;
 702                         struct dentry *failed_count;
 703                         struct dentry *retry_count;
 704                         struct dentry *multiple_retry_count;
 705                         struct dentry *frame_duplicate_count;
 706                         struct dentry *received_fragment_count;
 707                         struct dentry *multicast_received_frame_count;
 708                         struct dentry *transmitted_frame_count;
 709                         struct dentry *wep_undecryptable_count;
 710                         struct dentry *num_scans;
 711 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 712                         struct dentry *tx_handlers_drop;
 713                         struct dentry *tx_handlers_queued;
 714                         struct dentry *tx_handlers_drop_unencrypted;
 715                         struct dentry *tx_handlers_drop_fragment;
 716                         struct dentry *tx_handlers_drop_wep;
 717                         struct dentry *tx_handlers_drop_not_assoc;
 718                         struct dentry *tx_handlers_drop_unauth_port;
 719                         struct dentry *rx_handlers_drop;
 720                         struct dentry *rx_handlers_queued;
 721                         struct dentry *rx_handlers_drop_nullfunc;
 722                         struct dentry *rx_handlers_drop_defrag;
 723                         struct dentry *rx_handlers_drop_short;
 724                         struct dentry *rx_handlers_drop_passive_scan;
 725                         struct dentry *tx_expand_skb_head;
 726                         struct dentry *tx_expand_skb_head_cloned;
 727                         struct dentry *rx_expand_skb_head;
 728                         struct dentry *rx_expand_skb_head2;
 729                         struct dentry *rx_handlers_fragments;
 730                         struct dentry *tx_status_drop;
 731 #endif
 732                         struct dentry *dot11ACKFailureCount;
 733                         struct dentry *dot11RTSFailureCount;
 734                         struct dentry *dot11FCSErrorCount;
 735                         struct dentry *dot11RTSSuccessCount;
 736                 } stats;
 737                 struct dentry *stations;
 738                 struct dentry *keys;
 739         } debugfs;
 740 #endif
 741 };
 742
 743 static inline struct ieee80211_sub_if_data *
 744 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 745 {
 746         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 747
 748         BUG_ON(!local || local->mdev == dev);
 749
 750         return netdev_priv(dev);
 751 }
 752
 753 /* this struct represents 802.11n's RA/TID combination */
 754 struct ieee80211_ra_tid {
 755         u8 ra[ETH_ALEN];
 756         u16 tid;
 757 };
 758
 759 /* Parsed Information Elements */
 760 struct ieee802_11_elems {
 761         /* pointers to IEs */
 762         u8 *ssid;
 763         u8 *supp_rates;
 764         u8 *fh_params;
 765         u8 *ds_params;
 766         u8 *cf_params;
 767         u8 *tim;
 768         u8 *ibss_params;
 769         u8 *challenge;
 770         u8 *wpa;
 771         u8 *rsn;
 772         u8 *erp_info;
 773         u8 *ext_supp_rates;
 774         u8 *wmm_info;
 775         u8 *wmm_param;
 776         u8 *ht_cap_elem;
 777         u8 *ht_info_elem;
 778         u8 *mesh_config;
 779         u8 *mesh_id;
 780         u8 *peer_link;
 781         u8 *preq;
 782         u8 *prep;
 783         u8 *perr;
 784         u8 *ch_switch_elem;
 785         u8 *country_elem;
 786         u8 *pwr_constr_elem;
 787         u8 *quiet_elem;         /* first quite element */
 788
 789         /* length of them, respectively */
 790         u8 ssid_len;
 791         u8 supp_rates_len;
 792         u8 fh_params_len;
 793         u8 ds_params_len;
 794         u8 cf_params_len;
 795         u8 tim_len;
 796         u8 ibss_params_len;
 797         u8 challenge_len;
 798         u8 wpa_len;
 799         u8 rsn_len;
 800         u8 erp_info_len;
 801         u8 ext_supp_rates_len;
 802         u8 wmm_info_len;
 803         u8 wmm_param_len;
 804         u8 ht_cap_elem_len;
 805         u8 ht_info_elem_len;
 806         u8 mesh_config_len;
 807         u8 mesh_id_len;
 808         u8 peer_link_len;
 809         u8 preq_len;
 810         u8 prep_len;
 811         u8 perr_len;
 812         u8 ch_switch_elem_len;
 813         u8 country_elem_len;
 814         u8 pwr_constr_elem_len;
 815         u8 quiet_elem_len;
 816         u8 num_of_quiet_elem;   /* can be more the one */
 817 };
 818
 819 static inline struct ieee80211_local *hw_to_local(
 820         struct ieee80211_hw *hw)
 821 {
 822         return container_of(hw, struct ieee80211_local, hw);
 823 }
 824
 825 static inline struct ieee80211_hw *local_to_hw(
 826         struct ieee80211_local *local)
 827 {
 828         return &local->hw;
 829 }
 830
 831 struct sta_attribute {
 832         struct attribute attr;
 833         ssize_t (*show)(const struct sta_info *, char *buf);
 834         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 835 };
 836
 837 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 838 {
 839         return compare_ether_addr(raddr, addr) == 0 ||
 840                is_broadcast_ether_addr(raddr);
 841 }
 842
 843
 844 /* ieee80211.c */
 845 int ieee80211_hw_config(struct ieee80211_local *local);
 846 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 847 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 848 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 849                         struct ieee80211_ht_info *req_ht_cap,
 850                         struct ieee80211_ht_bss_info *req_bss_cap);
 851
 852 /* ieee80211_ioctl.c */
 853 extern const struct iw_handler_def ieee80211_iw_handler_def;
 854 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
 855
 856 /* ieee80211_sta.c */
 857 void ieee80211_sta_timer(unsigned long data);
 858 void ieee80211_sta_work(struct work_struct *work);
 859 void ieee80211_sta_scan_work(struct work_struct *work);
 860 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 861                            struct ieee80211_rx_status *rx_status);
 862 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 863 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 864 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 865 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len);
 866 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 867                             struct ieee80211_if_sta *ifsta);
 868 int ieee80211_sta_scan_results(struct ieee80211_local *local,
 869                                struct iw_request_info *info,
 870                                char *buf, size_t len);
 871 ieee80211_rx_result ieee80211_sta_rx_scan(
 872         struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 873         struct ieee80211_rx_status *rx_status);
 874 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 875 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 876 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len);
 877 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 878                                         struct sk_buff *skb, u8 *bssid,
 879                                         u8 *addr, u64 supp_rates);
 880 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 881 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 882 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 883                                       u32 changed);
 884 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 885 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 886                                    struct ieee80211_ht_info *ht_info);
 887 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 888                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 889                         struct ieee80211_ht_bss_info *bss_info);
 890 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
 891                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 892                                   u16 agg_size, u16 timeout);
 893 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
 894                                 u16 initiator, u16 reason_code);
 895 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 896
 897 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 898                                 u16 tid, u16 initiator, u16 reason);
 899 void sta_addba_resp_timer_expired(unsigned long data);
 900 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 901 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 902                             struct ieee802_11_elems *elems,
 903                             enum ieee80211_band band);
 904 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 905                 int encrypt);
 906 void ieee802_11_parse_elems(u8 *start, size_t len,
 907                                    struct ieee802_11_elems *elems);
 908
 909 #ifdef CONFIG_MAC80211_MESH
 910 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
 911 #else
 912 static inline void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 913 {}
 914 #endif
 915
 916 /* interface handling */
 917 void ieee80211_if_setup(struct net_device *dev);
 918 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 919                      struct net_device **new_dev, enum ieee80211_if_types type,
 920                      struct vif_params *params);
 921 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 922                              enum ieee80211_if_types type);
 923 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 924 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 925
 926 /* tx handling */
 927 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 928 void ieee80211_tx_pending(unsigned long data);
 929 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 930 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 931 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 932
 933 /* utility functions/constants */
 934 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 935 extern const unsigned char rfc1042_header[6];
 936 extern const unsigned char bridge_tunnel_header[6];
 937 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 938                         enum ieee80211_if_types type);
 939 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 940                              int rate, int erp, int short_preamble);
 941 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
 942                                      struct ieee80211_hdr *hdr);
 943
 944 #ifdef CONFIG_MAC80211_NOINLINE
 945 #define debug_noinline noinline
 946 #else
 947 #define debug_noinline
 948 #endif
 949
 950 #endif /* IEEE80211_I_H */