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 <net/wireless.h>
  25 #include "ieee80211_key.h"
  26 #include "sta_info.h"
  27
  28 /* ieee80211.o internal definitions, etc. These are not included into
  29  * low-level drivers. */
  30
  31 #ifndef ETH_P_PAE
  32 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
  33 #endif /* ETH_P_PAE */
  34
  35 #define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
  36
  37 struct ieee80211_local;
  38
  39 #define BIT(x) (1 << (x))
  40
  41 #define IEEE80211_ALIGN32_PAD(a) ((4 - ((a) & 3)) & 3)
  42
  43 /* Maximum number of broadcast/multicast frames to buffer when some of the
  44  * associated stations are using power saving. */
  45 #define AP_MAX_BC_BUFFER 128
  46
  47 /* Maximum number of frames buffered to all STAs, including multicast frames.
  48  * Note: increasing this limit increases the potential memory requirement. Each
  49  * frame can be up to about 2 kB long. */
  50 #define TOTAL_MAX_TX_BUFFER 512
  51
  52 /* Required encryption head and tailroom */
  53 #define IEEE80211_ENCRYPT_HEADROOM 8
  54 #define IEEE80211_ENCRYPT_TAILROOM 12
  55
  56 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  57  * reception of at least three fragmented frames. This limit can be increased
  58  * by changing this define, at the cost of slower frame reassembly and
  59  * increased memory use (about 2 kB of RAM per entry). */
  60 #define IEEE80211_FRAGMENT_MAX 4
  61
  62 struct ieee80211_fragment_entry {
  63         unsigned long first_frag_time;
  64         unsigned int seq;
  65         unsigned int rx_queue;
  66         unsigned int last_frag;
  67         unsigned int extra_len;
  68         struct sk_buff_head skb_list;
  69         int ccmp; /* Whether fragments were encrypted with CCMP */
  70         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  71 };
  72
  73
  74 struct ieee80211_sta_bss {
  75         struct list_head list;
  76         struct ieee80211_sta_bss *hnext;
  77         atomic_t users;
  78
  79         u8 bssid[ETH_ALEN];
  80         u8 ssid[IEEE80211_MAX_SSID_LEN];
  81         size_t ssid_len;
  82         u16 capability; /* host byte order */
  83         int hw_mode;
  84         int channel;
  85         int freq;
  86         int rssi, signal, noise;
  87         u8 *wpa_ie;
  88         size_t wpa_ie_len;
  89         u8 *rsn_ie;
  90         size_t rsn_ie_len;
  91         u8 *wmm_ie;
  92         size_t wmm_ie_len;
  93 #define IEEE80211_MAX_SUPP_RATES 32
  94         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  95         size_t supp_rates_len;
  96         int beacon_int;
  97         u64 timestamp;
  98
  99         int probe_resp;
 100         unsigned long last_update;
 101
 102 };
 103
 104
 105 typedef enum {
 106         TXRX_CONTINUE, TXRX_DROP, TXRX_QUEUED
 107 } ieee80211_txrx_result;
 108
 109 struct ieee80211_txrx_data {
 110         struct sk_buff *skb;
 111         struct net_device *dev;
 112         struct ieee80211_local *local;
 113         struct ieee80211_sub_if_data *sdata;
 114         struct sta_info *sta;
 115         u16 fc, ethertype;
 116         struct ieee80211_key *key;
 117         unsigned int fragmented:1; /* whether the MSDU was fragmented */
 118         union {
 119                 struct {
 120                         struct ieee80211_tx_control *control;
 121                         unsigned int unicast:1;
 122                         unsigned int ps_buffered:1;
 123                         unsigned int short_preamble:1;
 124                         unsigned int probe_last_frag:1;
 125                         struct ieee80211_hw_mode *mode;
 126                         struct ieee80211_rate *rate;
 127                         /* use this rate (if set) for last fragment; rate can
 128                          * be set to lower rate for the first fragments, e.g.,
 129                          * when using CTS protection with IEEE 802.11g. */
 130                         struct ieee80211_rate *last_frag_rate;
 131                         int last_frag_hwrate;
 132                         int mgmt_interface;
 133
 134                         /* Extra fragments (in addition to the first fragment
 135                          * in skb) */
 136                         int num_extra_frag;
 137                         struct sk_buff **extra_frag;
 138                 } tx;
 139                 struct {
 140                         struct ieee80211_rx_status *status;
 141                         int sent_ps_buffered;
 142                         int queue;
 143                         int load;
 144                         unsigned int in_scan:1;
 145                         /* frame is destined to interface currently processed
 146                          * (including multicast frames) */
 147                         unsigned int ra_match:1;
 148                 } rx;
 149         } u;
 150 };
 151
 152 /* Stored in sk_buff->cb */
 153 struct ieee80211_tx_packet_data {
 154         int ifindex;
 155         unsigned long jiffies;
 156         unsigned int req_tx_status:1;
 157         unsigned int do_not_encrypt:1;
 158         unsigned int requeue:1;
 159         unsigned int mgmt_iface:1;
 160         unsigned int queue:4;
 161 };
 162
 163 struct ieee80211_tx_stored_packet {
 164         struct ieee80211_tx_control control;
 165         struct sk_buff *skb;
 166         int num_extra_frag;
 167         struct sk_buff **extra_frag;
 168         int last_frag_rateidx;
 169         int last_frag_hwrate;
 170         struct ieee80211_rate *last_frag_rate;
 171         unsigned int last_frag_rate_ctrl_probe:1;
 172 };
 173
 174 typedef ieee80211_txrx_result (*ieee80211_tx_handler)
 175 (struct ieee80211_txrx_data *tx);
 176
 177 typedef ieee80211_txrx_result (*ieee80211_rx_handler)
 178 (struct ieee80211_txrx_data *rx);
 179
 180 struct ieee80211_if_ap {
 181         u8 *beacon_head, *beacon_tail;
 182         int beacon_head_len, beacon_tail_len;
 183
 184         u8 ssid[IEEE80211_MAX_SSID_LEN];
 185         size_t ssid_len;
 186         u8 *generic_elem;
 187         size_t generic_elem_len;
 188
 189         /* yes, this looks ugly, but guarantees that we can later use
 190          * bitmap_empty :)
 191          * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */
 192         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 193         atomic_t num_sta_ps; /* number of stations in PS mode */
 194         struct sk_buff_head ps_bc_buf;
 195         int dtim_period, dtim_count;
 196         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 197         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 198         int num_beacons; /* number of TXed beacon frames for this BSS */
 199 };
 200
 201 struct ieee80211_if_wds {
 202         u8 remote_addr[ETH_ALEN];
 203         struct sta_info *sta;
 204 };
 205
 206 struct ieee80211_if_vlan {
 207         u8 id;
 208 };
 209
 210 struct ieee80211_if_sta {
 211         enum {
 212                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 213                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 214                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED
 215         } state;
 216         struct timer_list timer;
 217         struct work_struct work;
 218         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 219         u8 ssid[IEEE80211_MAX_SSID_LEN];
 220         size_t ssid_len;
 221         u16 aid;
 222         u16 ap_capab, capab;
 223         u8 *extra_ie; /* to be added to the end of AssocReq */
 224         size_t extra_ie_len;
 225
 226         /* The last AssocReq/Resp IEs */
 227         u8 *assocreq_ies, *assocresp_ies;
 228         size_t assocreq_ies_len, assocresp_ies_len;
 229
 230         int auth_tries, assoc_tries;
 231
 232         unsigned int ssid_set:1;
 233         unsigned int bssid_set:1;
 234         unsigned int prev_bssid_set:1;
 235         unsigned int authenticated:1;
 236         unsigned int associated:1;
 237         unsigned int probereq_poll:1;
 238         unsigned int use_protection:1;
 239         unsigned int create_ibss:1;
 240         unsigned int mixed_cell:1;
 241         unsigned int wmm_enabled:1;
 242         unsigned int auto_ssid_sel:1;
 243         unsigned int auto_bssid_sel:1;
 244         unsigned int auto_channel_sel:1;
 245 #define IEEE80211_STA_REQ_SCAN 0
 246 #define IEEE80211_STA_REQ_AUTH 1
 247 #define IEEE80211_STA_REQ_RUN  2
 248         unsigned long request;
 249         struct sk_buff_head skb_queue;
 250
 251         int key_mgmt;
 252         unsigned long last_probe;
 253
 254 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 255 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 256 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 257         unsigned int auth_algs; /* bitfield of allowed auth algs */
 258         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 259         int auth_transaction;
 260
 261         unsigned long ibss_join_req;
 262         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 263         u32 supp_rates_bits;
 264
 265         int wmm_last_param_set;
 266 };
 267
 268
 269 struct ieee80211_sub_if_data {
 270         struct list_head list;
 271         unsigned int type;
 272
 273         struct wireless_dev wdev;
 274
 275         struct net_device *dev;
 276         struct ieee80211_local *local;
 277
 278         int mc_count;
 279         unsigned int allmulti:1;
 280         unsigned int promisc:1;
 281
 282         struct net_device_stats stats;
 283         int drop_unencrypted;
 284         int eapol; /* 0 = process EAPOL frames as normal data frames,
 285                     * 1 = send EAPOL frames through wlan#ap to hostapd
 286                     *     (default) */
 287         int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized
 288                          * port */
 289
 290         u16 sequence;
 291
 292         /* Fragment table for host-based reassembly */
 293         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 294         unsigned int fragment_next;
 295
 296 #define NUM_DEFAULT_KEYS 4
 297         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 298         struct ieee80211_key *default_key;
 299
 300         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 301
 302         union {
 303                 struct ieee80211_if_ap ap;
 304                 struct ieee80211_if_wds wds;
 305                 struct ieee80211_if_vlan vlan;
 306                 struct ieee80211_if_sta sta;
 307         } u;
 308         int channel_use;
 309         int channel_use_raw;
 310
 311 #ifdef CONFIG_MAC80211_DEBUGFS
 312         struct dentry *debugfsdir;
 313         union {
 314                 struct {
 315                         struct dentry *channel_use;
 316                         struct dentry *drop_unencrypted;
 317                         struct dentry *eapol;
 318                         struct dentry *ieee8021_x;
 319                         struct dentry *state;
 320                         struct dentry *bssid;
 321                         struct dentry *prev_bssid;
 322                         struct dentry *ssid_len;
 323                         struct dentry *aid;
 324                         struct dentry *ap_capab;
 325                         struct dentry *capab;
 326                         struct dentry *extra_ie_len;
 327                         struct dentry *auth_tries;
 328                         struct dentry *assoc_tries;
 329                         struct dentry *auth_algs;
 330                         struct dentry *auth_alg;
 331                         struct dentry *auth_transaction;
 332                         struct dentry *flags;
 333                 } sta;
 334                 struct {
 335                         struct dentry *channel_use;
 336                         struct dentry *drop_unencrypted;
 337                         struct dentry *eapol;
 338                         struct dentry *ieee8021_x;
 339                         struct dentry *num_sta_ps;
 340                         struct dentry *dtim_period;
 341                         struct dentry *dtim_count;
 342                         struct dentry *num_beacons;
 343                         struct dentry *force_unicast_rateidx;
 344                         struct dentry *max_ratectrl_rateidx;
 345                         struct dentry *num_buffered_multicast;
 346                         struct dentry *beacon_head_len;
 347                         struct dentry *beacon_tail_len;
 348                 } ap;
 349                 struct {
 350                         struct dentry *channel_use;
 351                         struct dentry *drop_unencrypted;
 352                         struct dentry *eapol;
 353                         struct dentry *ieee8021_x;
 354                         struct dentry *peer;
 355                 } wds;
 356                 struct {
 357                         struct dentry *channel_use;
 358                         struct dentry *drop_unencrypted;
 359                         struct dentry *eapol;
 360                         struct dentry *ieee8021_x;
 361                         struct dentry *vlan_id;
 362                 } vlan;
 363                 struct {
 364                         struct dentry *mode;
 365                 } monitor;
 366                 struct dentry *default_key;
 367         } debugfs;
 368 #endif
 369 };
 370
 371 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 372
 373 enum {
 374         IEEE80211_RX_MSG        = 1,
 375         IEEE80211_TX_STATUS_MSG = 2,
 376 };
 377
 378 struct ieee80211_local {
 379         /* embed the driver visible part.
 380          * don't cast (use the static inlines below), but we keep
 381          * it first anyway so they become a no-op */
 382         struct ieee80211_hw hw;
 383
 384         const struct ieee80211_ops *ops;
 385
 386         /* List of registered struct ieee80211_hw_mode */
 387         struct list_head modes_list;
 388
 389         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 390         struct net_device *apdev; /* wlan#ap - management frames (hostapd) */
 391         int open_count;
 392         int monitors;
 393         struct iw_statistics wstats;
 394         u8 wstats_flags;
 395
 396         enum {
 397                 IEEE80211_DEV_UNINITIALIZED = 0,
 398                 IEEE80211_DEV_REGISTERED,
 399                 IEEE80211_DEV_UNREGISTERED,
 400         } reg_state;
 401
 402         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 403          * added to skb_queue will be processed, but frames in
 404          * skb_queue_unreliable may be dropped if the total length of these
 405          * queues increases over the limit. */
 406 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 407         struct tasklet_struct tasklet;
 408         struct sk_buff_head skb_queue;
 409         struct sk_buff_head skb_queue_unreliable;
 410
 411         /* Station data structures */
 412         spinlock_t sta_lock; /* mutex for STA data structures */
 413         int num_sta; /* number of stations in sta_list */
 414         struct list_head sta_list;
 415         struct list_head deleted_sta_list;
 416         struct sta_info *sta_hash[STA_HASH_SIZE];
 417         struct timer_list sta_cleanup;
 418
 419         unsigned long state[NUM_TX_DATA_QUEUES];
 420         struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES];
 421         struct tasklet_struct tx_pending_tasklet;
 422
 423         int mc_count;   /* total count of multicast entries in all interfaces */
 424         int iff_allmultis, iff_promiscs;
 425                         /* number of interfaces with corresponding IFF_ flags */
 426
 427         struct rate_control_ref *rate_ctrl;
 428
 429         int next_mode; /* MODE_IEEE80211*
 430                         * The mode preference for next channel change. This is
 431                         * used to select .11g vs. .11b channels (or 4.9 GHz vs.
 432                         * .11a) when the channel number is not unique. */
 433
 434         /* Supported and basic rate filters for different modes. These are
 435          * pointers to -1 terminated lists and rates in 100 kbps units. */
 436         int *supp_rates[NUM_IEEE80211_MODES];
 437         int *basic_rates[NUM_IEEE80211_MODES];
 438
 439         int rts_threshold;
 440         int cts_protect_erp_frames;
 441         int fragmentation_threshold;
 442         int short_retry_limit; /* dot11ShortRetryLimit */
 443         int long_retry_limit; /* dot11LongRetryLimit */
 444         int short_preamble; /* use short preamble with IEEE 802.11b */
 445
 446         struct crypto_blkcipher *wep_tx_tfm;
 447         struct crypto_blkcipher *wep_rx_tfm;
 448         u32 wep_iv;
 449         int key_tx_rx_threshold; /* number of times any key can be used in TX
 450                                   * or RX before generating a rekey
 451                                   * notification; 0 = notification disabled. */
 452
 453         int bridge_packets; /* bridge packets between associated stations and
 454                              * deliver multicast frames both back to wireless
 455                              * media and to the local net stack */
 456
 457         ieee80211_rx_handler *rx_pre_handlers;
 458         ieee80211_rx_handler *rx_handlers;
 459         ieee80211_tx_handler *tx_handlers;
 460
 461         rwlock_t sub_if_lock; /* Protects sub_if_list. Cannot be taken under
 462                                * sta_bss_lock or sta_lock. */
 463         struct list_head sub_if_list;
 464         int sta_scanning;
 465         int scan_channel_idx;
 466         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 467         unsigned long last_scan_completed;
 468         struct delayed_work scan_work;
 469         struct net_device *scan_dev;
 470         struct ieee80211_channel *oper_channel, *scan_channel;
 471         struct ieee80211_hw_mode *oper_hw_mode, *scan_hw_mode;
 472         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 473         size_t scan_ssid_len;
 474         struct list_head sta_bss_list;
 475         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 476         spinlock_t sta_bss_lock;
 477 #define IEEE80211_SCAN_MATCH_SSID BIT(0)
 478 #define IEEE80211_SCAN_WPA_ONLY BIT(1)
 479 #define IEEE80211_SCAN_EXTRA_INFO BIT(2)
 480         int scan_flags;
 481
 482         /* SNMP counters */
 483         /* dot11CountersTable */
 484         u32 dot11TransmittedFragmentCount;
 485         u32 dot11MulticastTransmittedFrameCount;
 486         u32 dot11FailedCount;
 487         u32 dot11RetryCount;
 488         u32 dot11MultipleRetryCount;
 489         u32 dot11FrameDuplicateCount;
 490         u32 dot11ReceivedFragmentCount;
 491         u32 dot11MulticastReceivedFrameCount;
 492         u32 dot11TransmittedFrameCount;
 493         u32 dot11WEPUndecryptableCount;
 494
 495 #ifdef CONFIG_MAC80211_LEDS
 496         int tx_led_counter, rx_led_counter;
 497         struct led_trigger *tx_led, *rx_led;
 498         char tx_led_name[32], rx_led_name[32];
 499 #endif
 500
 501         u32 channel_use;
 502         u32 channel_use_raw;
 503         u32 stat_time;
 504         struct timer_list stat_timer;
 505
 506 #ifdef CONFIG_MAC80211_DEBUGFS
 507         struct work_struct sta_debugfs_add;
 508 #endif
 509
 510         enum {
 511                 STA_ANTENNA_SEL_AUTO = 0,
 512                 STA_ANTENNA_SEL_SW_CTRL = 1,
 513                 STA_ANTENNA_SEL_SW_CTRL_DEBUG = 2
 514         } sta_antenna_sel;
 515
 516         int rate_ctrl_num_up, rate_ctrl_num_down;
 517
 518 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 519         /* TX/RX handler statistics */
 520         unsigned int tx_handlers_drop;
 521         unsigned int tx_handlers_queued;
 522         unsigned int tx_handlers_drop_unencrypted;
 523         unsigned int tx_handlers_drop_fragment;
 524         unsigned int tx_handlers_drop_wep;
 525         unsigned int tx_handlers_drop_not_assoc;
 526         unsigned int tx_handlers_drop_unauth_port;
 527         unsigned int rx_handlers_drop;
 528         unsigned int rx_handlers_queued;
 529         unsigned int rx_handlers_drop_nullfunc;
 530         unsigned int rx_handlers_drop_defrag;
 531         unsigned int rx_handlers_drop_short;
 532         unsigned int rx_handlers_drop_passive_scan;
 533         unsigned int tx_expand_skb_head;
 534         unsigned int tx_expand_skb_head_cloned;
 535         unsigned int rx_expand_skb_head;
 536         unsigned int rx_expand_skb_head2;
 537         unsigned int rx_handlers_fragments;
 538         unsigned int tx_status_drop;
 539         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 540         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 541 #define I802_DEBUG_INC(c) (c)++
 542 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 543 #define I802_DEBUG_INC(c) do { } while (0)
 544 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 545
 546
 547         int default_wep_only; /* only default WEP keys are used with this
 548                                * interface; this is used to decide when hwaccel
 549                                * can be used with default keys */
 550         int total_ps_buffered; /* total number of all buffered unicast and
 551                                 * multicast packets for power saving stations
 552                                 */
 553         int allow_broadcast_always; /* whether to allow TX of broadcast frames
 554                                      * even when there are no associated STAs
 555                                      */
 556
 557         int wifi_wme_noack_test;
 558         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 559
 560         unsigned int enabled_modes; /* bitfield of allowed modes;
 561                                       * (1 << MODE_*) */
 562         unsigned int hw_modes; /* bitfield of supported hardware modes;
 563                                 * (1 << MODE_*) */
 564
 565         int user_space_mlme;
 566
 567 #ifdef CONFIG_MAC80211_DEBUGFS
 568         struct local_debugfsdentries {
 569                 struct dentry *channel;
 570                 struct dentry *frequency;
 571                 struct dentry *radar_detect;
 572                 struct dentry *antenna_sel_tx;
 573                 struct dentry *antenna_sel_rx;
 574                 struct dentry *bridge_packets;
 575                 struct dentry *key_tx_rx_threshold;
 576                 struct dentry *rts_threshold;
 577                 struct dentry *fragmentation_threshold;
 578                 struct dentry *short_retry_limit;
 579                 struct dentry *long_retry_limit;
 580                 struct dentry *total_ps_buffered;
 581                 struct dentry *mode;
 582                 struct dentry *wep_iv;
 583                 struct dentry *tx_power_reduction;
 584                 struct dentry *modes;
 585                 struct dentry *statistics;
 586                 struct local_debugfsdentries_statsdentries {
 587                         struct dentry *transmitted_fragment_count;
 588                         struct dentry *multicast_transmitted_frame_count;
 589                         struct dentry *failed_count;
 590                         struct dentry *retry_count;
 591                         struct dentry *multiple_retry_count;
 592                         struct dentry *frame_duplicate_count;
 593                         struct dentry *received_fragment_count;
 594                         struct dentry *multicast_received_frame_count;
 595                         struct dentry *transmitted_frame_count;
 596                         struct dentry *wep_undecryptable_count;
 597                         struct dentry *num_scans;
 598 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 599                         struct dentry *tx_handlers_drop;
 600                         struct dentry *tx_handlers_queued;
 601                         struct dentry *tx_handlers_drop_unencrypted;
 602                         struct dentry *tx_handlers_drop_fragment;
 603                         struct dentry *tx_handlers_drop_wep;
 604                         struct dentry *tx_handlers_drop_not_assoc;
 605                         struct dentry *tx_handlers_drop_unauth_port;
 606                         struct dentry *rx_handlers_drop;
 607                         struct dentry *rx_handlers_queued;
 608                         struct dentry *rx_handlers_drop_nullfunc;
 609                         struct dentry *rx_handlers_drop_defrag;
 610                         struct dentry *rx_handlers_drop_short;
 611                         struct dentry *rx_handlers_drop_passive_scan;
 612                         struct dentry *tx_expand_skb_head;
 613                         struct dentry *tx_expand_skb_head_cloned;
 614                         struct dentry *rx_expand_skb_head;
 615                         struct dentry *rx_expand_skb_head2;
 616                         struct dentry *rx_handlers_fragments;
 617                         struct dentry *tx_status_drop;
 618                         struct dentry *wme_tx_queue;
 619                         struct dentry *wme_rx_queue;
 620 #endif
 621                         struct dentry *dot11ACKFailureCount;
 622                         struct dentry *dot11RTSFailureCount;
 623                         struct dentry *dot11FCSErrorCount;
 624                         struct dentry *dot11RTSSuccessCount;
 625                 } stats;
 626                 struct dentry *stations;
 627                 struct dentry *keys;
 628         } debugfs;
 629 #endif
 630 };
 631
 632 static inline struct ieee80211_local *hw_to_local(
 633         struct ieee80211_hw *hw)
 634 {
 635         return container_of(hw, struct ieee80211_local, hw);
 636 }
 637
 638 static inline struct ieee80211_hw *local_to_hw(
 639         struct ieee80211_local *local)
 640 {
 641         return &local->hw;
 642 }
 643
 644 enum ieee80211_link_state_t {
 645         IEEE80211_LINK_STATE_XOFF = 0,
 646         IEEE80211_LINK_STATE_PENDING,
 647 };
 648
 649 struct sta_attribute {
 650         struct attribute attr;
 651         ssize_t (*show)(const struct sta_info *, char *buf);
 652         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 653 };
 654
 655 static inline void __bss_tim_set(struct ieee80211_if_ap *bss, int aid)
 656 {
 657         /*
 658          * This format has ben mandated by the IEEE specifications,
 659          * so this line may not be changed to use the __set_bit() format.
 660          */
 661         bss->tim[(aid)/8] |= 1<<((aid) % 8);
 662 }
 663
 664 static inline void bss_tim_set(struct ieee80211_local *local,
 665                                struct ieee80211_if_ap *bss, int aid)
 666 {
 667         spin_lock_bh(&local->sta_lock);
 668         __bss_tim_set(bss, aid);
 669         spin_unlock_bh(&local->sta_lock);
 670 }
 671
 672 static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, int aid)
 673 {
 674         /*
 675          * This format has ben mandated by the IEEE specifications,
 676          * so this line may not be changed to use the __clear_bit() format.
 677          */
 678         bss->tim[(aid)/8] &= !(1<<((aid) % 8));
 679 }
 680
 681 static inline void bss_tim_clear(struct ieee80211_local *local,
 682                                  struct ieee80211_if_ap *bss, int aid)
 683 {
 684         spin_lock_bh(&local->sta_lock);
 685         __bss_tim_clear(bss, aid);
 686         spin_unlock_bh(&local->sta_lock);
 687 }
 688
 689 /**
 690  * ieee80211_is_erp_rate - Check if a rate is an ERP rate
 691  * @phymode: The PHY-mode for this rate (MODE_IEEE80211...)
 692  * @rate: Transmission rate to check, in 100 kbps
 693  *
 694  * Check if a given rate is an Extended Rate PHY (ERP) rate.
 695  */
 696 static inline int ieee80211_is_erp_rate(int phymode, int rate)
 697 {
 698         if (phymode == MODE_IEEE80211G) {
 699                 if (rate != 10 && rate != 20 &&
 700                     rate != 55 && rate != 110)
 701                         return 1;
 702         }
 703         return 0;
 704 }
 705
 706 /* ieee80211.c */
 707 int ieee80211_hw_config(struct ieee80211_local *local);
 708 int ieee80211_if_config(struct net_device *dev);
 709 int ieee80211_if_config_beacon(struct net_device *dev);
 710 struct ieee80211_key_conf *
 711 ieee80211_key_data2conf(struct ieee80211_local *local,
 712                         const struct ieee80211_key *data);
 713 struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
 714                                           int idx, size_t key_len, gfp_t flags);
 715 void ieee80211_key_free(struct ieee80211_key *key);
 716 void ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 717                        struct ieee80211_rx_status *status, u32 msg_type);
 718 void ieee80211_prepare_rates(struct ieee80211_local *local,
 719                              struct ieee80211_hw_mode *mode);
 720 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
 721 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
 722 void ieee80211_if_setup(struct net_device *dev);
 723 void ieee80211_if_mgmt_setup(struct net_device *dev);
 724 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 725                                  const char *name);
 726 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev);
 727
 728 /* ieee80211_ioctl.c */
 729 extern const struct iw_handler_def ieee80211_iw_handler_def;
 730
 731 void ieee80211_update_default_wep_only(struct ieee80211_local *local);
 732
 733
 734 /* Least common multiple of the used rates (in 100 kbps). This is used to
 735  * calculate rate_inv values for each rate so that only integers are needed. */
 736 #define CHAN_UTIL_RATE_LCM 95040
 737 /* 1 usec is 1/8 * (95040/10) = 1188 */
 738 #define CHAN_UTIL_PER_USEC 1188
 739 /* Amount of bits to shift the result right to scale the total utilization
 740  * to values that will not wrap around 32-bit integers. */
 741 #define CHAN_UTIL_SHIFT 9
 742 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 743  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 744  * raw value with about 23 should give utilization in 10th of a percentage
 745  * (1/1000). However, utilization is only estimated and not all intervals
 746  * between frames etc. are calculated. 18 seems to give numbers that are closer
 747  * to the real maximum. */
 748 #define CHAN_UTIL_PER_10MS 18
 749 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 750 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 751
 752
 753 /* ieee80211_ioctl.c */
 754 int ieee80211_set_compression(struct ieee80211_local *local,
 755                               struct net_device *dev, struct sta_info *sta);
 756 int ieee80211_init_client(struct net_device *dev);
 757 int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq);
 758 /* ieee80211_sta.c */
 759 void ieee80211_sta_timer(unsigned long data);
 760 void ieee80211_sta_work(struct work_struct *work);
 761 void ieee80211_sta_scan_work(struct work_struct *work);
 762 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 763                            struct ieee80211_rx_status *rx_status);
 764 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 765 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 766 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 767 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 768 void ieee80211_sta_req_auth(struct net_device *dev,
 769                             struct ieee80211_if_sta *ifsta);
 770 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 771 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
 772                            struct ieee80211_rx_status *rx_status);
 773 void ieee80211_rx_bss_list_init(struct net_device *dev);
 774 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 775 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 776 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 777                                          struct sk_buff *skb, u8 *bssid,
 778                                          u8 *addr);
 779 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 780 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 781
 782 /* ieee80211_iface.c */
 783 int ieee80211_if_add(struct net_device *dev, const char *name,
 784                      struct net_device **new_dev, int type);
 785 void ieee80211_if_set_type(struct net_device *dev, int type);
 786 void ieee80211_if_reinit(struct net_device *dev);
 787 void __ieee80211_if_del(struct ieee80211_local *local,
 788                         struct ieee80211_sub_if_data *sdata);
 789 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 790 void ieee80211_if_free(struct net_device *dev);
 791 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 792 int ieee80211_if_add_mgmt(struct ieee80211_local *local);
 793 void ieee80211_if_del_mgmt(struct ieee80211_local *local);
 794
 795 /* for wiphy privid */
 796 extern void *mac80211_wiphy_privid;
 797
 798 #endif /* IEEE80211_I_H */