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  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef IEEE80211_I_H
  12 #define IEEE80211_I_H
  13
  14 #include <linux/kernel.h>
  15 #include <linux/device.h>
  16 #include <linux/if_ether.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/list.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/types.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/etherdevice.h>
  25 #include <net/wireless.h>
  26 #include "ieee80211_key.h"
  27 #include "sta_info.h"
  28
  29 /* ieee80211.o internal definitions, etc. These are not included into
  30  * low-level drivers. */
  31
  32 #ifndef ETH_P_PAE
  33 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
  34 #endif /* ETH_P_PAE */
  35
  36 #define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
  37
  38 struct ieee80211_local;
  39
  40 #define IEEE80211_ALIGN32_PAD(a) ((4 - ((a) & 3)) & 3)
  41
  42 /* Maximum number of broadcast/multicast frames to buffer when some of the
  43  * associated stations are using power saving. */
  44 #define AP_MAX_BC_BUFFER 128
  45
  46 /* Maximum number of frames buffered to all STAs, including multicast frames.
  47  * Note: increasing this limit increases the potential memory requirement. Each
  48  * frame can be up to about 2 kB long. */
  49 #define TOTAL_MAX_TX_BUFFER 512
  50
  51 /* Required encryption head and tailroom */
  52 #define IEEE80211_ENCRYPT_HEADROOM 8
  53 #define IEEE80211_ENCRYPT_TAILROOM 12
  54
  55 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  56  * reception of at least three fragmented frames. This limit can be increased
  57  * by changing this define, at the cost of slower frame reassembly and
  58  * increased memory use (about 2 kB of RAM per entry). */
  59 #define IEEE80211_FRAGMENT_MAX 4
  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_sta_bss {
  74         struct list_head list;
  75         struct ieee80211_sta_bss *hnext;
  76         atomic_t users;
  77
  78         u8 bssid[ETH_ALEN];
  79         u8 ssid[IEEE80211_MAX_SSID_LEN];
  80         size_t ssid_len;
  81         u16 capability; /* host byte order */
  82         int hw_mode;
  83         int channel;
  84         int freq;
  85         int rssi, signal, noise;
  86         u8 *wpa_ie;
  87         size_t wpa_ie_len;
  88         u8 *rsn_ie;
  89         size_t rsn_ie_len;
  90         u8 *wmm_ie;
  91         size_t wmm_ie_len;
  92 #define IEEE80211_MAX_SUPP_RATES 32
  93         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  94         size_t supp_rates_len;
  95         int beacon_int;
  96         u64 timestamp;
  97
  98         int 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
 110 typedef enum {
 111         TXRX_CONTINUE, TXRX_DROP, TXRX_QUEUED
 112 } ieee80211_txrx_result;
 113
 114 /* flags used in struct ieee80211_txrx_data.flags */
 115 /* whether the MSDU was fragmented */
 116 #define IEEE80211_TXRXD_FRAGMENTED              BIT(0)
 117 #define IEEE80211_TXRXD_TXUNICAST               BIT(1)
 118 #define IEEE80211_TXRXD_TXPS_BUFFERED           BIT(2)
 119 #define IEEE80211_TXRXD_TXPROBE_LAST_FRAG       BIT(3)
 120 #define IEEE80211_TXRXD_RXIN_SCAN               BIT(4)
 121 /* frame is destined to interface currently processed (incl. multicast frames) */
 122 #define IEEE80211_TXRXD_RXRA_MATCH              BIT(5)
 123 #define IEEE80211_TXRXD_TX_INJECTED             BIT(6)
 124 struct ieee80211_txrx_data {
 125         struct sk_buff *skb;
 126         struct net_device *dev;
 127         struct ieee80211_local *local;
 128         struct ieee80211_sub_if_data *sdata;
 129         struct sta_info *sta;
 130         u16 fc, ethertype;
 131         struct ieee80211_key *key;
 132         unsigned int flags;
 133         union {
 134                 struct {
 135                         struct ieee80211_tx_control *control;
 136                         struct ieee80211_hw_mode *mode;
 137                         struct ieee80211_rate *rate;
 138                         /* use this rate (if set) for last fragment; rate can
 139                          * be set to lower rate for the first fragments, e.g.,
 140                          * when using CTS protection with IEEE 802.11g. */
 141                         struct ieee80211_rate *last_frag_rate;
 142                         int last_frag_hwrate;
 143
 144                         /* Extra fragments (in addition to the first fragment
 145                          * in skb) */
 146                         int num_extra_frag;
 147                         struct sk_buff **extra_frag;
 148                 } tx;
 149                 struct {
 150                         struct ieee80211_rx_status *status;
 151                         int sent_ps_buffered;
 152                         int queue;
 153                         int load;
 154                         u32 tkip_iv32;
 155                         u16 tkip_iv16;
 156                 } rx;
 157         } u;
 158 };
 159
 160 /* flags used in struct ieee80211_tx_packet_data.flags */
 161 #define IEEE80211_TXPD_REQ_TX_STATUS    BIT(0)
 162 #define IEEE80211_TXPD_DO_NOT_ENCRYPT   BIT(1)
 163 #define IEEE80211_TXPD_REQUEUE          BIT(2)
 164 /* Stored in sk_buff->cb */
 165 struct ieee80211_tx_packet_data {
 166         int ifindex;
 167         unsigned long jiffies;
 168         unsigned int flags;
 169         u8 queue;
 170 };
 171
 172 struct ieee80211_tx_stored_packet {
 173         struct ieee80211_tx_control control;
 174         struct sk_buff *skb;
 175         int num_extra_frag;
 176         struct sk_buff **extra_frag;
 177         int last_frag_rateidx;
 178         int last_frag_hwrate;
 179         struct ieee80211_rate *last_frag_rate;
 180         unsigned int last_frag_rate_ctrl_probe;
 181 };
 182
 183 typedef ieee80211_txrx_result (*ieee80211_tx_handler)
 184 (struct ieee80211_txrx_data *tx);
 185
 186 typedef ieee80211_txrx_result (*ieee80211_rx_handler)
 187 (struct ieee80211_txrx_data *rx);
 188
 189 struct ieee80211_if_ap {
 190         u8 *beacon_head, *beacon_tail;
 191         int beacon_head_len, beacon_tail_len;
 192
 193         struct list_head vlans;
 194
 195         u8 ssid[IEEE80211_MAX_SSID_LEN];
 196         size_t ssid_len;
 197
 198         /* yes, this looks ugly, but guarantees that we can later use
 199          * bitmap_empty :)
 200          * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */
 201         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 202         atomic_t num_sta_ps; /* number of stations in PS mode */
 203         struct sk_buff_head ps_bc_buf;
 204         int dtim_period, dtim_count;
 205         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 206         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 207         int num_beacons; /* number of TXed beacon frames for this BSS */
 208 };
 209
 210 struct ieee80211_if_wds {
 211         u8 remote_addr[ETH_ALEN];
 212         struct sta_info *sta;
 213 };
 214
 215 struct ieee80211_if_vlan {
 216         struct ieee80211_sub_if_data *ap;
 217         struct list_head list;
 218 };
 219
 220 /* flags used in struct ieee80211_if_sta.flags */
 221 #define IEEE80211_STA_SSID_SET          BIT(0)
 222 #define IEEE80211_STA_BSSID_SET         BIT(1)
 223 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 224 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 225 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 226 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 227 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 228 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 229 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 230 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 231 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 232 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 233 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 234 struct ieee80211_if_sta {
 235         enum {
 236                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 237                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 238                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED
 239         } state;
 240         struct timer_list timer;
 241         struct work_struct work;
 242         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 243         u8 ssid[IEEE80211_MAX_SSID_LEN];
 244         size_t ssid_len;
 245         u16 aid;
 246         u16 ap_capab, capab;
 247         u8 *extra_ie; /* to be added to the end of AssocReq */
 248         size_t extra_ie_len;
 249
 250         /* The last AssocReq/Resp IEs */
 251         u8 *assocreq_ies, *assocresp_ies;
 252         size_t assocreq_ies_len, assocresp_ies_len;
 253
 254         int auth_tries, assoc_tries;
 255
 256         unsigned int flags;
 257 #define IEEE80211_STA_REQ_SCAN 0
 258 #define IEEE80211_STA_REQ_AUTH 1
 259 #define IEEE80211_STA_REQ_RUN  2
 260         unsigned long request;
 261         struct sk_buff_head skb_queue;
 262
 263         unsigned long last_probe;
 264
 265 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 266 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 267 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 268         unsigned int auth_algs; /* bitfield of allowed auth algs */
 269         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 270         int auth_transaction;
 271
 272         unsigned long ibss_join_req;
 273         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 274         u32 supp_rates_bits;
 275
 276         int wmm_last_param_set;
 277 };
 278
 279
 280 /* flags used in struct ieee80211_sub_if_data.flags */
 281 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 282 #define IEEE80211_SDATA_PROMISC         BIT(1)
 283 #define IEEE80211_SDATA_USE_PROTECTION  BIT(2) /* CTS protect ERP frames */
 284 /* use short preamble with IEEE 802.11b: this flag is set when the AP or beacon
 285  * generator reports that there are no present stations that cannot support short
 286  * preambles */
 287 #define IEEE80211_SDATA_SHORT_PREAMBLE  BIT(3)
 288 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(4)
 289 struct ieee80211_sub_if_data {
 290         struct list_head list;
 291         enum ieee80211_if_types type;
 292
 293         struct wireless_dev wdev;
 294
 295         /* keys */
 296         struct list_head key_list;
 297
 298         struct net_device *dev;
 299         struct ieee80211_local *local;
 300
 301         unsigned int flags;
 302
 303         int drop_unencrypted;
 304         int eapol; /* 0 = process EAPOL frames as normal data frames,
 305                     * 1 = send EAPOL frames through wlan#ap to hostapd
 306                     *     (default) */
 307         int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized
 308                          * port */
 309
 310         u16 sequence;
 311
 312         /* Fragment table for host-based reassembly */
 313         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 314         unsigned int fragment_next;
 315
 316 #define NUM_DEFAULT_KEYS 4
 317         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 318         struct ieee80211_key *default_key;
 319
 320         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 321
 322         union {
 323                 struct ieee80211_if_ap ap;
 324                 struct ieee80211_if_wds wds;
 325                 struct ieee80211_if_vlan vlan;
 326                 struct ieee80211_if_sta sta;
 327         } u;
 328         int channel_use;
 329         int channel_use_raw;
 330
 331 #ifdef CONFIG_MAC80211_DEBUGFS
 332         struct dentry *debugfsdir;
 333         union {
 334                 struct {
 335                         struct dentry *channel_use;
 336                         struct dentry *drop_unencrypted;
 337                         struct dentry *eapol;
 338                         struct dentry *ieee8021_x;
 339                         struct dentry *state;
 340                         struct dentry *bssid;
 341                         struct dentry *prev_bssid;
 342                         struct dentry *ssid_len;
 343                         struct dentry *aid;
 344                         struct dentry *ap_capab;
 345                         struct dentry *capab;
 346                         struct dentry *extra_ie_len;
 347                         struct dentry *auth_tries;
 348                         struct dentry *assoc_tries;
 349                         struct dentry *auth_algs;
 350                         struct dentry *auth_alg;
 351                         struct dentry *auth_transaction;
 352                         struct dentry *flags;
 353                 } sta;
 354                 struct {
 355                         struct dentry *channel_use;
 356                         struct dentry *drop_unencrypted;
 357                         struct dentry *eapol;
 358                         struct dentry *ieee8021_x;
 359                         struct dentry *num_sta_ps;
 360                         struct dentry *dtim_period;
 361                         struct dentry *dtim_count;
 362                         struct dentry *num_beacons;
 363                         struct dentry *force_unicast_rateidx;
 364                         struct dentry *max_ratectrl_rateidx;
 365                         struct dentry *num_buffered_multicast;
 366                         struct dentry *beacon_head_len;
 367                         struct dentry *beacon_tail_len;
 368                 } ap;
 369                 struct {
 370                         struct dentry *channel_use;
 371                         struct dentry *drop_unencrypted;
 372                         struct dentry *eapol;
 373                         struct dentry *ieee8021_x;
 374                         struct dentry *peer;
 375                 } wds;
 376                 struct {
 377                         struct dentry *channel_use;
 378                         struct dentry *drop_unencrypted;
 379                         struct dentry *eapol;
 380                         struct dentry *ieee8021_x;
 381                 } vlan;
 382                 struct {
 383                         struct dentry *mode;
 384                 } monitor;
 385                 struct dentry *default_key;
 386         } debugfs;
 387 #endif
 388 };
 389
 390 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 391
 392 enum {
 393         IEEE80211_RX_MSG        = 1,
 394         IEEE80211_TX_STATUS_MSG = 2,
 395 };
 396
 397 struct ieee80211_local {
 398         /* embed the driver visible part.
 399          * don't cast (use the static inlines below), but we keep
 400          * it first anyway so they become a no-op */
 401         struct ieee80211_hw hw;
 402
 403         const struct ieee80211_ops *ops;
 404
 405         /* List of registered struct ieee80211_hw_mode */
 406         struct list_head modes_list;
 407
 408         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 409         int open_count;
 410         int monitors;
 411         unsigned int filter_flags; /* FIF_* */
 412         struct iw_statistics wstats;
 413         u8 wstats_flags;
 414         int tx_headroom; /* required headroom for hardware/radiotap */
 415
 416         enum {
 417                 IEEE80211_DEV_UNINITIALIZED = 0,
 418                 IEEE80211_DEV_REGISTERED,
 419                 IEEE80211_DEV_UNREGISTERED,
 420         } reg_state;
 421
 422         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 423          * added to skb_queue will be processed, but frames in
 424          * skb_queue_unreliable may be dropped if the total length of these
 425          * queues increases over the limit. */
 426 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 427         struct tasklet_struct tasklet;
 428         struct sk_buff_head skb_queue;
 429         struct sk_buff_head skb_queue_unreliable;
 430
 431         /* Station data structures */
 432         rwlock_t sta_lock; /* protects STA data structures */
 433         int num_sta; /* number of stations in sta_list */
 434         struct list_head sta_list;
 435         struct sta_info *sta_hash[STA_HASH_SIZE];
 436         struct timer_list sta_cleanup;
 437
 438         unsigned long state[NUM_TX_DATA_QUEUES];
 439         struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES];
 440         struct tasklet_struct tx_pending_tasklet;
 441
 442         /* number of interfaces with corresponding IFF_ flags */
 443         atomic_t iff_allmultis, iff_promiscs;
 444
 445         struct rate_control_ref *rate_ctrl;
 446
 447         /* Supported and basic rate filters for different modes. These are
 448          * pointers to -1 terminated lists and rates in 100 kbps units. */
 449         int *supp_rates[NUM_IEEE80211_MODES];
 450         int *basic_rates[NUM_IEEE80211_MODES];
 451
 452         int rts_threshold;
 453         int fragmentation_threshold;
 454         int short_retry_limit; /* dot11ShortRetryLimit */
 455         int long_retry_limit; /* dot11LongRetryLimit */
 456
 457         struct crypto_blkcipher *wep_tx_tfm;
 458         struct crypto_blkcipher *wep_rx_tfm;
 459         u32 wep_iv;
 460
 461         int bridge_packets; /* bridge packets between associated stations and
 462                              * deliver multicast frames both back to wireless
 463                              * media and to the local net stack */
 464
 465         ieee80211_rx_handler *rx_pre_handlers;
 466         ieee80211_rx_handler *rx_handlers;
 467         ieee80211_tx_handler *tx_handlers;
 468
 469         struct list_head interfaces;
 470
 471         int sta_scanning;
 472         int scan_channel_idx;
 473         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 474         unsigned long last_scan_completed;
 475         struct delayed_work scan_work;
 476         struct net_device *scan_dev;
 477         struct ieee80211_channel *oper_channel, *scan_channel;
 478         struct ieee80211_hw_mode *oper_hw_mode, *scan_hw_mode;
 479         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 480         size_t scan_ssid_len;
 481         struct list_head sta_bss_list;
 482         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 483         spinlock_t sta_bss_lock;
 484 #define IEEE80211_SCAN_MATCH_SSID BIT(0)
 485 #define IEEE80211_SCAN_WPA_ONLY BIT(1)
 486 #define IEEE80211_SCAN_EXTRA_INFO BIT(2)
 487         int scan_flags;
 488
 489         /* SNMP counters */
 490         /* dot11CountersTable */
 491         u32 dot11TransmittedFragmentCount;
 492         u32 dot11MulticastTransmittedFrameCount;
 493         u32 dot11FailedCount;
 494         u32 dot11RetryCount;
 495         u32 dot11MultipleRetryCount;
 496         u32 dot11FrameDuplicateCount;
 497         u32 dot11ReceivedFragmentCount;
 498         u32 dot11MulticastReceivedFrameCount;
 499         u32 dot11TransmittedFrameCount;
 500         u32 dot11WEPUndecryptableCount;
 501
 502 #ifdef CONFIG_MAC80211_LEDS
 503         int tx_led_counter, rx_led_counter;
 504         struct led_trigger *tx_led, *rx_led, *assoc_led;
 505         char tx_led_name[32], rx_led_name[32], assoc_led_name[32];
 506 #endif
 507
 508         u32 channel_use;
 509         u32 channel_use_raw;
 510
 511 #ifdef CONFIG_MAC80211_DEBUGFS
 512         struct work_struct sta_debugfs_add;
 513 #endif
 514
 515 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 516         /* TX/RX handler statistics */
 517         unsigned int tx_handlers_drop;
 518         unsigned int tx_handlers_queued;
 519         unsigned int tx_handlers_drop_unencrypted;
 520         unsigned int tx_handlers_drop_fragment;
 521         unsigned int tx_handlers_drop_wep;
 522         unsigned int tx_handlers_drop_not_assoc;
 523         unsigned int tx_handlers_drop_unauth_port;
 524         unsigned int rx_handlers_drop;
 525         unsigned int rx_handlers_queued;
 526         unsigned int rx_handlers_drop_nullfunc;
 527         unsigned int rx_handlers_drop_defrag;
 528         unsigned int rx_handlers_drop_short;
 529         unsigned int rx_handlers_drop_passive_scan;
 530         unsigned int tx_expand_skb_head;
 531         unsigned int tx_expand_skb_head_cloned;
 532         unsigned int rx_expand_skb_head;
 533         unsigned int rx_expand_skb_head2;
 534         unsigned int rx_handlers_fragments;
 535         unsigned int tx_status_drop;
 536         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 537         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 538 #define I802_DEBUG_INC(c) (c)++
 539 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 540 #define I802_DEBUG_INC(c) do { } while (0)
 541 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 542
 543
 544         int total_ps_buffered; /* total number of all buffered unicast and
 545                                 * multicast packets for power saving stations
 546                                 */
 547         int wifi_wme_noack_test;
 548         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 549
 550         unsigned int enabled_modes; /* bitfield of allowed modes;
 551                                       * (1 << MODE_*) */
 552         unsigned int hw_modes; /* bitfield of supported hardware modes;
 553                                 * (1 << MODE_*) */
 554
 555 #ifdef CONFIG_MAC80211_DEBUGFS
 556         struct local_debugfsdentries {
 557                 struct dentry *channel;
 558                 struct dentry *frequency;
 559                 struct dentry *antenna_sel_tx;
 560                 struct dentry *antenna_sel_rx;
 561                 struct dentry *bridge_packets;
 562                 struct dentry *rts_threshold;
 563                 struct dentry *fragmentation_threshold;
 564                 struct dentry *short_retry_limit;
 565                 struct dentry *long_retry_limit;
 566                 struct dentry *total_ps_buffered;
 567                 struct dentry *mode;
 568                 struct dentry *wep_iv;
 569                 struct dentry *modes;
 570                 struct dentry *statistics;
 571                 struct local_debugfsdentries_statsdentries {
 572                         struct dentry *transmitted_fragment_count;
 573                         struct dentry *multicast_transmitted_frame_count;
 574                         struct dentry *failed_count;
 575                         struct dentry *retry_count;
 576                         struct dentry *multiple_retry_count;
 577                         struct dentry *frame_duplicate_count;
 578                         struct dentry *received_fragment_count;
 579                         struct dentry *multicast_received_frame_count;
 580                         struct dentry *transmitted_frame_count;
 581                         struct dentry *wep_undecryptable_count;
 582                         struct dentry *num_scans;
 583 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 584                         struct dentry *tx_handlers_drop;
 585                         struct dentry *tx_handlers_queued;
 586                         struct dentry *tx_handlers_drop_unencrypted;
 587                         struct dentry *tx_handlers_drop_fragment;
 588                         struct dentry *tx_handlers_drop_wep;
 589                         struct dentry *tx_handlers_drop_not_assoc;
 590                         struct dentry *tx_handlers_drop_unauth_port;
 591                         struct dentry *rx_handlers_drop;
 592                         struct dentry *rx_handlers_queued;
 593                         struct dentry *rx_handlers_drop_nullfunc;
 594                         struct dentry *rx_handlers_drop_defrag;
 595                         struct dentry *rx_handlers_drop_short;
 596                         struct dentry *rx_handlers_drop_passive_scan;
 597                         struct dentry *tx_expand_skb_head;
 598                         struct dentry *tx_expand_skb_head_cloned;
 599                         struct dentry *rx_expand_skb_head;
 600                         struct dentry *rx_expand_skb_head2;
 601                         struct dentry *rx_handlers_fragments;
 602                         struct dentry *tx_status_drop;
 603                         struct dentry *wme_tx_queue;
 604                         struct dentry *wme_rx_queue;
 605 #endif
 606                         struct dentry *dot11ACKFailureCount;
 607                         struct dentry *dot11RTSFailureCount;
 608                         struct dentry *dot11FCSErrorCount;
 609                         struct dentry *dot11RTSSuccessCount;
 610                 } stats;
 611                 struct dentry *stations;
 612                 struct dentry *keys;
 613         } debugfs;
 614 #endif
 615 };
 616
 617 static inline struct ieee80211_local *hw_to_local(
 618         struct ieee80211_hw *hw)
 619 {
 620         return container_of(hw, struct ieee80211_local, hw);
 621 }
 622
 623 static inline struct ieee80211_hw *local_to_hw(
 624         struct ieee80211_local *local)
 625 {
 626         return &local->hw;
 627 }
 628
 629 enum ieee80211_link_state_t {
 630         IEEE80211_LINK_STATE_XOFF = 0,
 631         IEEE80211_LINK_STATE_PENDING,
 632 };
 633
 634 struct sta_attribute {
 635         struct attribute attr;
 636         ssize_t (*show)(const struct sta_info *, char *buf);
 637         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 638 };
 639
 640 static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid)
 641 {
 642         /*
 643          * This format has been mandated by the IEEE specifications,
 644          * so this line may not be changed to use the __set_bit() format.
 645          */
 646         bss->tim[aid / 8] |= (1 << (aid % 8));
 647 }
 648
 649 static inline void bss_tim_set(struct ieee80211_local *local,
 650                                struct ieee80211_if_ap *bss, u16 aid)
 651 {
 652         read_lock_bh(&local->sta_lock);
 653         __bss_tim_set(bss, aid);
 654         read_unlock_bh(&local->sta_lock);
 655 }
 656
 657 static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid)
 658 {
 659         /*
 660          * This format has been mandated by the IEEE specifications,
 661          * so this line may not be changed to use the __clear_bit() format.
 662          */
 663         bss->tim[aid / 8] &= ~(1 << (aid % 8));
 664 }
 665
 666 static inline void bss_tim_clear(struct ieee80211_local *local,
 667                                  struct ieee80211_if_ap *bss, u16 aid)
 668 {
 669         read_lock_bh(&local->sta_lock);
 670         __bss_tim_clear(bss, aid);
 671         read_unlock_bh(&local->sta_lock);
 672 }
 673
 674 /**
 675  * ieee80211_is_erp_rate - Check if a rate is an ERP rate
 676  * @phymode: The PHY-mode for this rate (MODE_IEEE80211...)
 677  * @rate: Transmission rate to check, in 100 kbps
 678  *
 679  * Check if a given rate is an Extended Rate PHY (ERP) rate.
 680  */
 681 static inline int ieee80211_is_erp_rate(int phymode, int rate)
 682 {
 683         if (phymode == MODE_IEEE80211G) {
 684                 if (rate != 10 && rate != 20 &&
 685                     rate != 55 && rate != 110)
 686                         return 1;
 687         }
 688         return 0;
 689 }
 690
 691 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 692 {
 693         return compare_ether_addr(raddr, addr) == 0 ||
 694                is_broadcast_ether_addr(raddr);
 695 }
 696
 697
 698 /* ieee80211.c */
 699 int ieee80211_hw_config(struct ieee80211_local *local);
 700 int ieee80211_if_config(struct net_device *dev);
 701 int ieee80211_if_config_beacon(struct net_device *dev);
 702 void ieee80211_prepare_rates(struct ieee80211_local *local,
 703                              struct ieee80211_hw_mode *mode);
 704 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
 705 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
 706 void ieee80211_if_setup(struct net_device *dev);
 707 struct ieee80211_rate *ieee80211_get_rate(struct ieee80211_local *local,
 708                                           int phymode, int hwrate);
 709
 710 /* ieee80211_ioctl.c */
 711 extern const struct iw_handler_def ieee80211_iw_handler_def;
 712
 713
 714 /* Least common multiple of the used rates (in 100 kbps). This is used to
 715  * calculate rate_inv values for each rate so that only integers are needed. */
 716 #define CHAN_UTIL_RATE_LCM 95040
 717 /* 1 usec is 1/8 * (95040/10) = 1188 */
 718 #define CHAN_UTIL_PER_USEC 1188
 719 /* Amount of bits to shift the result right to scale the total utilization
 720  * to values that will not wrap around 32-bit integers. */
 721 #define CHAN_UTIL_SHIFT 9
 722 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 723  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 724  * raw value with about 23 should give utilization in 10th of a percentage
 725  * (1/1000). However, utilization is only estimated and not all intervals
 726  * between frames etc. are calculated. 18 seems to give numbers that are closer
 727  * to the real maximum. */
 728 #define CHAN_UTIL_PER_10MS 18
 729 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 730 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 731
 732
 733 /* ieee80211_ioctl.c */
 734 int ieee80211_set_compression(struct ieee80211_local *local,
 735                               struct net_device *dev, struct sta_info *sta);
 736 int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq);
 737 /* ieee80211_sta.c */
 738 void ieee80211_sta_timer(unsigned long data);
 739 void ieee80211_sta_work(struct work_struct *work);
 740 void ieee80211_sta_scan_work(struct work_struct *work);
 741 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 742                            struct ieee80211_rx_status *rx_status);
 743 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 744 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 745 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 746 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 747 void ieee80211_sta_req_auth(struct net_device *dev,
 748                             struct ieee80211_if_sta *ifsta);
 749 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 750 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
 751                            struct ieee80211_rx_status *rx_status);
 752 void ieee80211_rx_bss_list_init(struct net_device *dev);
 753 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 754 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 755 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 756                                          struct sk_buff *skb, u8 *bssid,
 757                                          u8 *addr);
 758 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 759 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 760 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
 761 void ieee80211_reset_erp_info(struct net_device *dev);
 762
 763 /* ieee80211_iface.c */
 764 int ieee80211_if_add(struct net_device *dev, const char *name,
 765                      struct net_device **new_dev, int type);
 766 void ieee80211_if_set_type(struct net_device *dev, int type);
 767 void ieee80211_if_reinit(struct net_device *dev);
 768 void __ieee80211_if_del(struct ieee80211_local *local,
 769                         struct ieee80211_sub_if_data *sdata);
 770 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 771 void ieee80211_if_free(struct net_device *dev);
 772 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 773
 774 /* regdomain.c */
 775 void ieee80211_regdomain_init(void);
 776 void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode);
 777
 778 /* rx handling */
 779 extern ieee80211_rx_handler ieee80211_rx_pre_handlers[];
 780 extern ieee80211_rx_handler ieee80211_rx_handlers[];
 781
 782 /* tx handling */
 783 extern ieee80211_tx_handler ieee80211_tx_handlers[];
 784 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 785 void ieee80211_tx_pending(unsigned long data);
 786 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 787 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 788 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 789
 790 /* utility functions/constants */
 791 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 792 extern const unsigned char rfc1042_header[6];
 793 extern const unsigned char bridge_tunnel_header[6];
 794 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
 795 int ieee80211_is_eapol(const struct sk_buff *skb);
 796 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 797                              int rate, int erp, int short_preamble);
 798 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 799                                      struct ieee80211_hdr *hdr);
 800
 801 #endif /* IEEE80211_I_H */