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         u8 *ht_ie;
  93         size_t ht_ie_len;
  94 #define IEEE80211_MAX_SUPP_RATES 32
  95         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  96         size_t supp_rates_len;
  97         int beacon_int;
  98         u64 timestamp;
  99
 100         int probe_resp;
 101         unsigned long last_update;
 102
 103         /* during assocation, we save an ERP value from a probe response so
 104          * that we can feed ERP info to the driver when handling the
 105          * association completes. these fields probably won't be up-to-date
 106          * otherwise, you probably don't want to use them. */
 107         int has_erp_value;
 108         u8 erp_value;
 109 };
 110
 111
 112 typedef enum {
 113         TXRX_CONTINUE, TXRX_DROP, TXRX_QUEUED
 114 } ieee80211_txrx_result;
 115
 116 /* flags used in struct ieee80211_txrx_data.flags */
 117 /* whether the MSDU was fragmented */
 118 #define IEEE80211_TXRXD_FRAGMENTED              BIT(0)
 119 #define IEEE80211_TXRXD_TXUNICAST               BIT(1)
 120 #define IEEE80211_TXRXD_TXPS_BUFFERED           BIT(2)
 121 #define IEEE80211_TXRXD_TXPROBE_LAST_FRAG       BIT(3)
 122 #define IEEE80211_TXRXD_RXIN_SCAN               BIT(4)
 123 /* frame is destined to interface currently processed (incl. multicast frames) */
 124 #define IEEE80211_TXRXD_RXRA_MATCH              BIT(5)
 125 #define IEEE80211_TXRXD_TX_INJECTED             BIT(6)
 126 #define IEEE80211_TXRXD_RX_AMSDU                BIT(7)
 127 struct ieee80211_txrx_data {
 128         struct sk_buff *skb;
 129         struct net_device *dev;
 130         struct ieee80211_local *local;
 131         struct ieee80211_sub_if_data *sdata;
 132         struct sta_info *sta;
 133         u16 fc, ethertype;
 134         struct ieee80211_key *key;
 135         unsigned int flags;
 136         union {
 137                 struct {
 138                         struct ieee80211_tx_control *control;
 139                         struct ieee80211_hw_mode *mode;
 140                         struct ieee80211_rate *rate;
 141                         /* use this rate (if set) for last fragment; rate can
 142                          * be set to lower rate for the first fragments, e.g.,
 143                          * when using CTS protection with IEEE 802.11g. */
 144                         struct ieee80211_rate *last_frag_rate;
 145                         int last_frag_hwrate;
 146
 147                         /* Extra fragments (in addition to the first fragment
 148                          * in skb) */
 149                         int num_extra_frag;
 150                         struct sk_buff **extra_frag;
 151                 } tx;
 152                 struct {
 153                         struct ieee80211_rx_status *status;
 154                         int sent_ps_buffered;
 155                         int queue;
 156                         int load;
 157                         u32 tkip_iv32;
 158                         u16 tkip_iv16;
 159                 } rx;
 160         } u;
 161 };
 162
 163 /* flags used in struct ieee80211_tx_packet_data.flags */
 164 #define IEEE80211_TXPD_REQ_TX_STATUS    BIT(0)
 165 #define IEEE80211_TXPD_DO_NOT_ENCRYPT   BIT(1)
 166 #define IEEE80211_TXPD_REQUEUE          BIT(2)
 167 #define IEEE80211_TXPD_EAPOL_FRAME      BIT(3)
 168 /* Stored in sk_buff->cb */
 169 struct ieee80211_tx_packet_data {
 170         int ifindex;
 171         unsigned long jiffies;
 172         unsigned int flags;
 173         u8 queue;
 174 };
 175
 176 struct ieee80211_tx_stored_packet {
 177         struct ieee80211_tx_control control;
 178         struct sk_buff *skb;
 179         int num_extra_frag;
 180         struct sk_buff **extra_frag;
 181         int last_frag_rateidx;
 182         int last_frag_hwrate;
 183         struct ieee80211_rate *last_frag_rate;
 184         unsigned int last_frag_rate_ctrl_probe;
 185 };
 186
 187 typedef ieee80211_txrx_result (*ieee80211_tx_handler)
 188 (struct ieee80211_txrx_data *tx);
 189
 190 typedef ieee80211_txrx_result (*ieee80211_rx_handler)
 191 (struct ieee80211_txrx_data *rx);
 192
 193 struct ieee80211_if_ap {
 194         u8 *beacon_head, *beacon_tail;
 195         int beacon_head_len, beacon_tail_len;
 196
 197         struct list_head vlans;
 198
 199         u8 ssid[IEEE80211_MAX_SSID_LEN];
 200         size_t ssid_len;
 201
 202         /* yes, this looks ugly, but guarantees that we can later use
 203          * bitmap_empty :)
 204          * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */
 205         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 206         atomic_t num_sta_ps; /* number of stations in PS mode */
 207         struct sk_buff_head ps_bc_buf;
 208         int dtim_period, dtim_count;
 209         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 210         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 211         int num_beacons; /* number of TXed beacon frames for this BSS */
 212 };
 213
 214 struct ieee80211_if_wds {
 215         u8 remote_addr[ETH_ALEN];
 216         struct sta_info *sta;
 217 };
 218
 219 struct ieee80211_if_vlan {
 220         struct ieee80211_sub_if_data *ap;
 221         struct list_head list;
 222 };
 223
 224 /* flags used in struct ieee80211_if_sta.flags */
 225 #define IEEE80211_STA_SSID_SET          BIT(0)
 226 #define IEEE80211_STA_BSSID_SET         BIT(1)
 227 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 228 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 229 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 230 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 231 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 232 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 233 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 234 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 235 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 236 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 237 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 238 struct ieee80211_if_sta {
 239         enum {
 240                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 241                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 242                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED
 243         } state;
 244         struct timer_list timer;
 245         struct work_struct work;
 246         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 247         u8 ssid[IEEE80211_MAX_SSID_LEN];
 248         size_t ssid_len;
 249         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 250         size_t scan_ssid_len;
 251         u16 aid;
 252         u16 ap_capab, capab;
 253         u8 *extra_ie; /* to be added to the end of AssocReq */
 254         size_t extra_ie_len;
 255
 256         /* The last AssocReq/Resp IEs */
 257         u8 *assocreq_ies, *assocresp_ies;
 258         size_t assocreq_ies_len, assocresp_ies_len;
 259
 260         int auth_tries, assoc_tries;
 261
 262         unsigned int flags;
 263 #define IEEE80211_STA_REQ_SCAN 0
 264 #define IEEE80211_STA_REQ_AUTH 1
 265 #define IEEE80211_STA_REQ_RUN  2
 266         unsigned long request;
 267         struct sk_buff_head skb_queue;
 268
 269         unsigned long last_probe;
 270
 271 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 272 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 273 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 274         unsigned int auth_algs; /* bitfield of allowed auth algs */
 275         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 276         int auth_transaction;
 277
 278         unsigned long ibss_join_req;
 279         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 280         u32 supp_rates_bits;
 281
 282         int wmm_last_param_set;
 283 };
 284
 285
 286 /* flags used in struct ieee80211_sub_if_data.flags */
 287 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 288 #define IEEE80211_SDATA_PROMISC         BIT(1)
 289 #define IEEE80211_SDATA_USE_PROTECTION  BIT(2) /* CTS protect ERP frames */
 290 /* use short preamble with IEEE 802.11b: this flag is set when the AP or beacon
 291  * generator reports that there are no present stations that cannot support short
 292  * preambles */
 293 #define IEEE80211_SDATA_SHORT_PREAMBLE  BIT(3)
 294 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(4)
 295 struct ieee80211_sub_if_data {
 296         struct list_head list;
 297         enum ieee80211_if_types type;
 298
 299         struct wireless_dev wdev;
 300
 301         /* keys */
 302         struct list_head key_list;
 303
 304         struct net_device *dev;
 305         struct ieee80211_local *local;
 306
 307         unsigned int flags;
 308
 309         int drop_unencrypted;
 310         /*
 311          * IEEE 802.1X Port access control in effect,
 312          * drop packets to/from unauthorized port
 313          */
 314         int ieee802_1x_pac;
 315
 316         u16 sequence;
 317
 318         /* Fragment table for host-based reassembly */
 319         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 320         unsigned int fragment_next;
 321
 322 #define NUM_DEFAULT_KEYS 4
 323         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 324         struct ieee80211_key *default_key;
 325
 326         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 327
 328         union {
 329                 struct ieee80211_if_ap ap;
 330                 struct ieee80211_if_wds wds;
 331                 struct ieee80211_if_vlan vlan;
 332                 struct ieee80211_if_sta sta;
 333         } u;
 334         int channel_use;
 335         int channel_use_raw;
 336
 337 #ifdef CONFIG_MAC80211_DEBUGFS
 338         struct dentry *debugfsdir;
 339         union {
 340                 struct {
 341                         struct dentry *channel_use;
 342                         struct dentry *drop_unencrypted;
 343                         struct dentry *ieee802_1x_pac;
 344                         struct dentry *state;
 345                         struct dentry *bssid;
 346                         struct dentry *prev_bssid;
 347                         struct dentry *ssid_len;
 348                         struct dentry *aid;
 349                         struct dentry *ap_capab;
 350                         struct dentry *capab;
 351                         struct dentry *extra_ie_len;
 352                         struct dentry *auth_tries;
 353                         struct dentry *assoc_tries;
 354                         struct dentry *auth_algs;
 355                         struct dentry *auth_alg;
 356                         struct dentry *auth_transaction;
 357                         struct dentry *flags;
 358                 } sta;
 359                 struct {
 360                         struct dentry *channel_use;
 361                         struct dentry *drop_unencrypted;
 362                         struct dentry *ieee802_1x_pac;
 363                         struct dentry *num_sta_ps;
 364                         struct dentry *dtim_period;
 365                         struct dentry *dtim_count;
 366                         struct dentry *num_beacons;
 367                         struct dentry *force_unicast_rateidx;
 368                         struct dentry *max_ratectrl_rateidx;
 369                         struct dentry *num_buffered_multicast;
 370                         struct dentry *beacon_head_len;
 371                         struct dentry *beacon_tail_len;
 372                 } ap;
 373                 struct {
 374                         struct dentry *channel_use;
 375                         struct dentry *drop_unencrypted;
 376                         struct dentry *ieee802_1x_pac;
 377                         struct dentry *peer;
 378                 } wds;
 379                 struct {
 380                         struct dentry *channel_use;
 381                         struct dentry *drop_unencrypted;
 382                         struct dentry *ieee802_1x_pac;
 383                 } vlan;
 384                 struct {
 385                         struct dentry *mode;
 386                 } monitor;
 387                 struct dentry *default_key;
 388         } debugfs;
 389 #endif
 390 };
 391
 392 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 393
 394 enum {
 395         IEEE80211_RX_MSG        = 1,
 396         IEEE80211_TX_STATUS_MSG = 2,
 397 };
 398
 399 struct ieee80211_local {
 400         /* embed the driver visible part.
 401          * don't cast (use the static inlines below), but we keep
 402          * it first anyway so they become a no-op */
 403         struct ieee80211_hw hw;
 404
 405         const struct ieee80211_ops *ops;
 406
 407         /* List of registered struct ieee80211_hw_mode */
 408         struct list_head modes_list;
 409
 410         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 411         int open_count;
 412         int monitors;
 413         unsigned int filter_flags; /* FIF_* */
 414         struct iw_statistics wstats;
 415         u8 wstats_flags;
 416         int tx_headroom; /* required headroom for hardware/radiotap */
 417
 418         enum {
 419                 IEEE80211_DEV_UNINITIALIZED = 0,
 420                 IEEE80211_DEV_REGISTERED,
 421                 IEEE80211_DEV_UNREGISTERED,
 422         } reg_state;
 423
 424         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 425          * added to skb_queue will be processed, but frames in
 426          * skb_queue_unreliable may be dropped if the total length of these
 427          * queues increases over the limit. */
 428 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 429         struct tasklet_struct tasklet;
 430         struct sk_buff_head skb_queue;
 431         struct sk_buff_head skb_queue_unreliable;
 432
 433         /* Station data structures */
 434         rwlock_t sta_lock; /* protects STA data structures */
 435         int num_sta; /* number of stations in sta_list */
 436         struct list_head sta_list;
 437         struct sta_info *sta_hash[STA_HASH_SIZE];
 438         struct timer_list sta_cleanup;
 439
 440         unsigned long state[NUM_TX_DATA_QUEUES];
 441         struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES];
 442         struct tasklet_struct tx_pending_tasklet;
 443
 444         /* number of interfaces with corresponding IFF_ flags */
 445         atomic_t iff_allmultis, iff_promiscs;
 446
 447         struct rate_control_ref *rate_ctrl;
 448
 449         /* Supported and basic rate filters for different modes. These are
 450          * pointers to -1 terminated lists and rates in 100 kbps units. */
 451         int *supp_rates[NUM_IEEE80211_MODES];
 452         int *basic_rates[NUM_IEEE80211_MODES];
 453
 454         int rts_threshold;
 455         int fragmentation_threshold;
 456         int short_retry_limit; /* dot11ShortRetryLimit */
 457         int long_retry_limit; /* dot11LongRetryLimit */
 458
 459         struct crypto_blkcipher *wep_tx_tfm;
 460         struct crypto_blkcipher *wep_rx_tfm;
 461         u32 wep_iv;
 462
 463         int bridge_packets; /* bridge packets between associated stations and
 464                              * deliver multicast frames both back to wireless
 465                              * media and to the local net stack */
 466
 467         ieee80211_rx_handler *rx_pre_handlers;
 468         ieee80211_rx_handler *rx_handlers;
 469         ieee80211_tx_handler *tx_handlers;
 470
 471         struct list_head interfaces;
 472
 473         bool sta_sw_scanning;
 474         bool sta_hw_scanning;
 475         int scan_channel_idx;
 476         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 477         unsigned long last_scan_completed;
 478         struct delayed_work scan_work;
 479         struct net_device *scan_dev;
 480         struct ieee80211_channel *oper_channel, *scan_channel;
 481         struct ieee80211_hw_mode *oper_hw_mode, *scan_hw_mode;
 482         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 483         size_t scan_ssid_len;
 484         struct list_head sta_bss_list;
 485         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 486         spinlock_t sta_bss_lock;
 487
 488         /* SNMP counters */
 489         /* dot11CountersTable */
 490         u32 dot11TransmittedFragmentCount;
 491         u32 dot11MulticastTransmittedFrameCount;
 492         u32 dot11FailedCount;
 493         u32 dot11RetryCount;
 494         u32 dot11MultipleRetryCount;
 495         u32 dot11FrameDuplicateCount;
 496         u32 dot11ReceivedFragmentCount;
 497         u32 dot11MulticastReceivedFrameCount;
 498         u32 dot11TransmittedFrameCount;
 499         u32 dot11WEPUndecryptableCount;
 500
 501 #ifdef CONFIG_MAC80211_LEDS
 502         int tx_led_counter, rx_led_counter;
 503         struct led_trigger *tx_led, *rx_led, *assoc_led;
 504         char tx_led_name[32], rx_led_name[32], assoc_led_name[32];
 505 #endif
 506
 507         u32 channel_use;
 508         u32 channel_use_raw;
 509
 510 #ifdef CONFIG_MAC80211_DEBUGFS
 511         struct work_struct sta_debugfs_add;
 512 #endif
 513
 514 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 515         /* TX/RX handler statistics */
 516         unsigned int tx_handlers_drop;
 517         unsigned int tx_handlers_queued;
 518         unsigned int tx_handlers_drop_unencrypted;
 519         unsigned int tx_handlers_drop_fragment;
 520         unsigned int tx_handlers_drop_wep;
 521         unsigned int tx_handlers_drop_not_assoc;
 522         unsigned int tx_handlers_drop_unauth_port;
 523         unsigned int rx_handlers_drop;
 524         unsigned int rx_handlers_queued;
 525         unsigned int rx_handlers_drop_nullfunc;
 526         unsigned int rx_handlers_drop_defrag;
 527         unsigned int rx_handlers_drop_short;
 528         unsigned int rx_handlers_drop_passive_scan;
 529         unsigned int tx_expand_skb_head;
 530         unsigned int tx_expand_skb_head_cloned;
 531         unsigned int rx_expand_skb_head;
 532         unsigned int rx_expand_skb_head2;
 533         unsigned int rx_handlers_fragments;
 534         unsigned int tx_status_drop;
 535         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 536         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 537 #define I802_DEBUG_INC(c) (c)++
 538 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 539 #define I802_DEBUG_INC(c) do { } while (0)
 540 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 541
 542
 543         int total_ps_buffered; /* total number of all buffered unicast and
 544                                 * multicast packets for power saving stations
 545                                 */
 546         int wifi_wme_noack_test;
 547         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 548
 549         unsigned int enabled_modes; /* bitfield of allowed modes;
 550                                       * (1 << MODE_*) */
 551         unsigned int hw_modes; /* bitfield of supported hardware modes;
 552                                 * (1 << MODE_*) */
 553
 554 #ifdef CONFIG_MAC80211_DEBUGFS
 555         struct local_debugfsdentries {
 556                 struct dentry *channel;
 557                 struct dentry *frequency;
 558                 struct dentry *antenna_sel_tx;
 559                 struct dentry *antenna_sel_rx;
 560                 struct dentry *bridge_packets;
 561                 struct dentry *rts_threshold;
 562                 struct dentry *fragmentation_threshold;
 563                 struct dentry *short_retry_limit;
 564                 struct dentry *long_retry_limit;
 565                 struct dentry *total_ps_buffered;
 566                 struct dentry *mode;
 567                 struct dentry *wep_iv;
 568                 struct dentry *modes;
 569                 struct dentry *statistics;
 570                 struct local_debugfsdentries_statsdentries {
 571                         struct dentry *transmitted_fragment_count;
 572                         struct dentry *multicast_transmitted_frame_count;
 573                         struct dentry *failed_count;
 574                         struct dentry *retry_count;
 575                         struct dentry *multiple_retry_count;
 576                         struct dentry *frame_duplicate_count;
 577                         struct dentry *received_fragment_count;
 578                         struct dentry *multicast_received_frame_count;
 579                         struct dentry *transmitted_frame_count;
 580                         struct dentry *wep_undecryptable_count;
 581                         struct dentry *num_scans;
 582 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 583                         struct dentry *tx_handlers_drop;
 584                         struct dentry *tx_handlers_queued;
 585                         struct dentry *tx_handlers_drop_unencrypted;
 586                         struct dentry *tx_handlers_drop_fragment;
 587                         struct dentry *tx_handlers_drop_wep;
 588                         struct dentry *tx_handlers_drop_not_assoc;
 589                         struct dentry *tx_handlers_drop_unauth_port;
 590                         struct dentry *rx_handlers_drop;
 591                         struct dentry *rx_handlers_queued;
 592                         struct dentry *rx_handlers_drop_nullfunc;
 593                         struct dentry *rx_handlers_drop_defrag;
 594                         struct dentry *rx_handlers_drop_short;
 595                         struct dentry *rx_handlers_drop_passive_scan;
 596                         struct dentry *tx_expand_skb_head;
 597                         struct dentry *tx_expand_skb_head_cloned;
 598                         struct dentry *rx_expand_skb_head;
 599                         struct dentry *rx_expand_skb_head2;
 600                         struct dentry *rx_handlers_fragments;
 601                         struct dentry *tx_status_drop;
 602                         struct dentry *wme_tx_queue;
 603                         struct dentry *wme_rx_queue;
 604 #endif
 605                         struct dentry *dot11ACKFailureCount;
 606                         struct dentry *dot11RTSFailureCount;
 607                         struct dentry *dot11FCSErrorCount;
 608                         struct dentry *dot11RTSSuccessCount;
 609                 } stats;
 610                 struct dentry *stations;
 611                 struct dentry *keys;
 612         } debugfs;
 613 #endif
 614 };
 615
 616 static inline struct ieee80211_local *hw_to_local(
 617         struct ieee80211_hw *hw)
 618 {
 619         return container_of(hw, struct ieee80211_local, hw);
 620 }
 621
 622 static inline struct ieee80211_hw *local_to_hw(
 623         struct ieee80211_local *local)
 624 {
 625         return &local->hw;
 626 }
 627
 628 enum ieee80211_link_state_t {
 629         IEEE80211_LINK_STATE_XOFF = 0,
 630         IEEE80211_LINK_STATE_PENDING,
 631 };
 632
 633 struct sta_attribute {
 634         struct attribute attr;
 635         ssize_t (*show)(const struct sta_info *, char *buf);
 636         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 637 };
 638
 639 static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid)
 640 {
 641         /*
 642          * This format has been mandated by the IEEE specifications,
 643          * so this line may not be changed to use the __set_bit() format.
 644          */
 645         bss->tim[aid / 8] |= (1 << (aid % 8));
 646 }
 647
 648 static inline void bss_tim_set(struct ieee80211_local *local,
 649                                struct ieee80211_if_ap *bss, u16 aid)
 650 {
 651         read_lock_bh(&local->sta_lock);
 652         __bss_tim_set(bss, aid);
 653         read_unlock_bh(&local->sta_lock);
 654 }
 655
 656 static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid)
 657 {
 658         /*
 659          * This format has been mandated by the IEEE specifications,
 660          * so this line may not be changed to use the __clear_bit() format.
 661          */
 662         bss->tim[aid / 8] &= ~(1 << (aid % 8));
 663 }
 664
 665 static inline void bss_tim_clear(struct ieee80211_local *local,
 666                                  struct ieee80211_if_ap *bss, u16 aid)
 667 {
 668         read_lock_bh(&local->sta_lock);
 669         __bss_tim_clear(bss, aid);
 670         read_unlock_bh(&local->sta_lock);
 671 }
 672
 673 /**
 674  * ieee80211_is_erp_rate - Check if a rate is an ERP rate
 675  * @phymode: The PHY-mode for this rate (MODE_IEEE80211...)
 676  * @rate: Transmission rate to check, in 100 kbps
 677  *
 678  * Check if a given rate is an Extended Rate PHY (ERP) rate.
 679  */
 680 static inline int ieee80211_is_erp_rate(int phymode, int rate)
 681 {
 682         if (phymode == MODE_IEEE80211G) {
 683                 if (rate != 10 && rate != 20 &&
 684                     rate != 55 && rate != 110)
 685                         return 1;
 686         }
 687         return 0;
 688 }
 689
 690 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 691 {
 692         return compare_ether_addr(raddr, addr) == 0 ||
 693                is_broadcast_ether_addr(raddr);
 694 }
 695
 696
 697 /* ieee80211.c */
 698 int ieee80211_hw_config(struct ieee80211_local *local);
 699 int ieee80211_if_config(struct net_device *dev);
 700 int ieee80211_if_config_beacon(struct net_device *dev);
 701 void ieee80211_prepare_rates(struct ieee80211_local *local,
 702                              struct ieee80211_hw_mode *mode);
 703 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
 704 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
 705 void ieee80211_if_setup(struct net_device *dev);
 706 struct ieee80211_rate *ieee80211_get_rate(struct ieee80211_local *local,
 707                                           int phymode, int hwrate);
 708 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 709                            struct ieee80211_ht_info *req_ht_cap,
 710                            struct ieee80211_ht_bss_info *req_bss_cap);
 711
 712 /* ieee80211_ioctl.c */
 713 extern const struct iw_handler_def ieee80211_iw_handler_def;
 714
 715
 716 /* Least common multiple of the used rates (in 100 kbps). This is used to
 717  * calculate rate_inv values for each rate so that only integers are needed. */
 718 #define CHAN_UTIL_RATE_LCM 95040
 719 /* 1 usec is 1/8 * (95040/10) = 1188 */
 720 #define CHAN_UTIL_PER_USEC 1188
 721 /* Amount of bits to shift the result right to scale the total utilization
 722  * to values that will not wrap around 32-bit integers. */
 723 #define CHAN_UTIL_SHIFT 9
 724 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 725  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 726  * raw value with about 23 should give utilization in 10th of a percentage
 727  * (1/1000). However, utilization is only estimated and not all intervals
 728  * between frames etc. are calculated. 18 seems to give numbers that are closer
 729  * to the real maximum. */
 730 #define CHAN_UTIL_PER_10MS 18
 731 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 732 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 733
 734
 735 /* ieee80211_ioctl.c */
 736 int ieee80211_set_compression(struct ieee80211_local *local,
 737                               struct net_device *dev, struct sta_info *sta);
 738 int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq);
 739 /* ieee80211_sta.c */
 740 void ieee80211_sta_timer(unsigned long data);
 741 void ieee80211_sta_work(struct work_struct *work);
 742 void ieee80211_sta_scan_work(struct work_struct *work);
 743 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 744                            struct ieee80211_rx_status *rx_status);
 745 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 746 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 747 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 748 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 749 void ieee80211_sta_req_auth(struct net_device *dev,
 750                             struct ieee80211_if_sta *ifsta);
 751 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 752 ieee80211_txrx_result ieee80211_sta_rx_scan(struct net_device *dev,
 753                                             struct sk_buff *skb,
 754                            struct ieee80211_rx_status *rx_status);
 755 void ieee80211_rx_bss_list_init(struct net_device *dev);
 756 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 757 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 758 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 759                                          struct sk_buff *skb, u8 *bssid,
 760                                          u8 *addr);
 761 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 762 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 763 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
 764 void ieee80211_reset_erp_info(struct net_device *dev);
 765 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 766                                    struct ieee80211_ht_info *ht_info);
 767 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 768                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 769                         struct ieee80211_ht_bss_info *bss_info);
 770 /* ieee80211_iface.c */
 771 int ieee80211_if_add(struct net_device *dev, const char *name,
 772                      struct net_device **new_dev, int type);
 773 void ieee80211_if_set_type(struct net_device *dev, int type);
 774 void ieee80211_if_reinit(struct net_device *dev);
 775 void __ieee80211_if_del(struct ieee80211_local *local,
 776                         struct ieee80211_sub_if_data *sdata);
 777 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 778 void ieee80211_if_free(struct net_device *dev);
 779 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 780
 781 /* regdomain.c */
 782 void ieee80211_regdomain_init(void);
 783 void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode);
 784
 785 /* rx handling */
 786 extern ieee80211_rx_handler ieee80211_rx_pre_handlers[];
 787 extern ieee80211_rx_handler ieee80211_rx_handlers[];
 788
 789 /* tx handling */
 790 extern ieee80211_tx_handler ieee80211_tx_handlers[];
 791 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 792 void ieee80211_tx_pending(unsigned long data);
 793 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 794 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 795 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 796
 797 /* utility functions/constants */
 798 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 799 extern const unsigned char rfc1042_header[6];
 800 extern const unsigned char bridge_tunnel_header[6];
 801 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
 802 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 803                              int rate, int erp, int short_preamble);
 804 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 805                                      struct ieee80211_hdr *hdr);
 806
 807 #endif /* IEEE80211_I_H */