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 BIT(x) (1 << (x))
  41
  42 #define IEEE80211_ALIGN32_PAD(a) ((4 - ((a) & 3)) & 3)
  43
  44 /* Maximum number of broadcast/multicast frames to buffer when some of the
  45  * associated stations are using power saving. */
  46 #define AP_MAX_BC_BUFFER 128
  47
  48 /* Maximum number of frames buffered to all STAs, including multicast frames.
  49  * Note: increasing this limit increases the potential memory requirement. Each
  50  * frame can be up to about 2 kB long. */
  51 #define TOTAL_MAX_TX_BUFFER 512
  52
  53 /* Required encryption head and tailroom */
  54 #define IEEE80211_ENCRYPT_HEADROOM 8
  55 #define IEEE80211_ENCRYPT_TAILROOM 12
  56
  57 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  58  * reception of at least three fragmented frames. This limit can be increased
  59  * by changing this define, at the cost of slower frame reassembly and
  60  * increased memory use (about 2 kB of RAM per entry). */
  61 #define IEEE80211_FRAGMENT_MAX 4
  62
  63 struct ieee80211_fragment_entry {
  64         unsigned long first_frag_time;
  65         unsigned int seq;
  66         unsigned int rx_queue;
  67         unsigned int last_frag;
  68         unsigned int extra_len;
  69         struct sk_buff_head skb_list;
  70         int ccmp; /* Whether fragments were encrypted with CCMP */
  71         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  72 };
  73
  74
  75 struct ieee80211_sta_bss {
  76         struct list_head list;
  77         struct ieee80211_sta_bss *hnext;
  78         atomic_t users;
  79
  80         u8 bssid[ETH_ALEN];
  81         u8 ssid[IEEE80211_MAX_SSID_LEN];
  82         size_t ssid_len;
  83         u16 capability; /* host byte order */
  84         int hw_mode;
  85         int channel;
  86         int freq;
  87         int rssi, signal, noise;
  88         u8 *wpa_ie;
  89         size_t wpa_ie_len;
  90         u8 *rsn_ie;
  91         size_t rsn_ie_len;
  92         u8 *wmm_ie;
  93         size_t wmm_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 struct ieee80211_txrx_data {
 126         struct sk_buff *skb;
 127         struct net_device *dev;
 128         struct ieee80211_local *local;
 129         struct ieee80211_sub_if_data *sdata;
 130         struct sta_info *sta;
 131         u16 fc, ethertype;
 132         struct ieee80211_key *key;
 133         unsigned int flags;
 134         union {
 135                 struct {
 136                         struct ieee80211_tx_control *control;
 137                         struct ieee80211_hw_mode *mode;
 138                         struct ieee80211_rate *rate;
 139                         /* use this rate (if set) for last fragment; rate can
 140                          * be set to lower rate for the first fragments, e.g.,
 141                          * when using CTS protection with IEEE 802.11g. */
 142                         struct ieee80211_rate *last_frag_rate;
 143                         int last_frag_hwrate;
 144                         int mgmt_interface;
 145
 146                         /* Extra fragments (in addition to the first fragment
 147                          * in skb) */
 148                         int num_extra_frag;
 149                         struct sk_buff **extra_frag;
 150                 } tx;
 151                 struct {
 152                         struct ieee80211_rx_status *status;
 153                         int sent_ps_buffered;
 154                         int queue;
 155                         int load;
 156                         u32 tkip_iv32;
 157                         u16 tkip_iv16;
 158                 } rx;
 159         } u;
 160 };
 161
 162 /* flags used in struct ieee80211_tx_packet_data.flags */
 163 #define IEEE80211_TXPD_REQ_TX_STATUS    BIT(0)
 164 #define IEEE80211_TXPD_DO_NOT_ENCRYPT   BIT(1)
 165 #define IEEE80211_TXPD_REQUEUE          BIT(2)
 166 #define IEEE80211_TXPD_MGMT_IFACE       BIT(3)
 167 /* Stored in sk_buff->cb */
 168 struct ieee80211_tx_packet_data {
 169         int ifindex;
 170         unsigned long jiffies;
 171         unsigned int flags;
 172         u8 queue;
 173 };
 174
 175 struct ieee80211_tx_stored_packet {
 176         struct ieee80211_tx_control control;
 177         struct sk_buff *skb;
 178         int num_extra_frag;
 179         struct sk_buff **extra_frag;
 180         int last_frag_rateidx;
 181         int last_frag_hwrate;
 182         struct ieee80211_rate *last_frag_rate;
 183         unsigned int last_frag_rate_ctrl_probe;
 184 };
 185
 186 typedef ieee80211_txrx_result (*ieee80211_tx_handler)
 187 (struct ieee80211_txrx_data *tx);
 188
 189 typedef ieee80211_txrx_result (*ieee80211_rx_handler)
 190 (struct ieee80211_txrx_data *rx);
 191
 192 struct ieee80211_if_ap {
 193         u8 *beacon_head, *beacon_tail;
 194         int beacon_head_len, beacon_tail_len;
 195
 196         struct list_head vlans;
 197
 198         u8 ssid[IEEE80211_MAX_SSID_LEN];
 199         size_t ssid_len;
 200         u8 *generic_elem;
 201         size_t generic_elem_len;
 202
 203         /* yes, this looks ugly, but guarantees that we can later use
 204          * bitmap_empty :)
 205          * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */
 206         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 207         atomic_t num_sta_ps; /* number of stations in PS mode */
 208         struct sk_buff_head ps_bc_buf;
 209         int dtim_period, dtim_count;
 210         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 211         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 212         int num_beacons; /* number of TXed beacon frames for this BSS */
 213 };
 214
 215 struct ieee80211_if_wds {
 216         u8 remote_addr[ETH_ALEN];
 217         struct sta_info *sta;
 218 };
 219
 220 struct ieee80211_if_vlan {
 221         struct ieee80211_sub_if_data *ap;
 222         struct list_head list;
 223 };
 224
 225 /* flags used in struct ieee80211_if_sta.flags */
 226 #define IEEE80211_STA_SSID_SET          BIT(0)
 227 #define IEEE80211_STA_BSSID_SET         BIT(1)
 228 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 229 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 230 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 231 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 232 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 233 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 234 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 235 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 236 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 237 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 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         u16 aid;
 250         u16 ap_capab, capab;
 251         u8 *extra_ie; /* to be added to the end of AssocReq */
 252         size_t extra_ie_len;
 253
 254         /* The last AssocReq/Resp IEs */
 255         u8 *assocreq_ies, *assocresp_ies;
 256         size_t assocreq_ies_len, assocresp_ies_len;
 257
 258         int auth_tries, assoc_tries;
 259
 260         unsigned int flags;
 261 #define IEEE80211_STA_REQ_SCAN 0
 262 #define IEEE80211_STA_REQ_AUTH 1
 263 #define IEEE80211_STA_REQ_RUN  2
 264         unsigned long request;
 265         struct sk_buff_head skb_queue;
 266
 267         int key_management_enabled;
 268         unsigned long last_probe;
 269
 270 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 271 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 272 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 273         unsigned int auth_algs; /* bitfield of allowed auth algs */
 274         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 275         int auth_transaction;
 276
 277         unsigned long ibss_join_req;
 278         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 279         u32 supp_rates_bits;
 280
 281         int wmm_last_param_set;
 282 };
 283
 284
 285 /* flags used in struct ieee80211_sub_if_data.flags */
 286 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 287 #define IEEE80211_SDATA_PROMISC         BIT(1)
 288 #define IEEE80211_SDATA_USE_PROTECTION  BIT(2) /* CTS protect ERP frames */
 289 /* use short preamble with IEEE 802.11b: this flag is set when the AP or beacon
 290  * generator reports that there are no present stations that cannot support short
 291  * preambles */
 292 #define IEEE80211_SDATA_SHORT_PREAMBLE  BIT(3)
 293 struct ieee80211_sub_if_data {
 294         struct list_head list;
 295         enum ieee80211_if_types type;
 296
 297         struct wireless_dev wdev;
 298
 299         /* keys */
 300         struct list_head key_list;
 301
 302         struct net_device *dev;
 303         struct ieee80211_local *local;
 304
 305         unsigned int flags;
 306
 307         int drop_unencrypted;
 308         int eapol; /* 0 = process EAPOL frames as normal data frames,
 309                     * 1 = send EAPOL frames through wlan#ap to hostapd
 310                     *     (default) */
 311         int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized
 312                          * port */
 313
 314         u16 sequence;
 315
 316         /* Fragment table for host-based reassembly */
 317         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 318         unsigned int fragment_next;
 319
 320 #define NUM_DEFAULT_KEYS 4
 321         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 322         struct ieee80211_key *default_key;
 323
 324         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 325
 326         union {
 327                 struct ieee80211_if_ap ap;
 328                 struct ieee80211_if_wds wds;
 329                 struct ieee80211_if_vlan vlan;
 330                 struct ieee80211_if_sta sta;
 331         } u;
 332         int channel_use;
 333         int channel_use_raw;
 334
 335 #ifdef CONFIG_MAC80211_DEBUGFS
 336         struct dentry *debugfsdir;
 337         union {
 338                 struct {
 339                         struct dentry *channel_use;
 340                         struct dentry *drop_unencrypted;
 341                         struct dentry *eapol;
 342                         struct dentry *ieee8021_x;
 343                         struct dentry *state;
 344                         struct dentry *bssid;
 345                         struct dentry *prev_bssid;
 346                         struct dentry *ssid_len;
 347                         struct dentry *aid;
 348                         struct dentry *ap_capab;
 349                         struct dentry *capab;
 350                         struct dentry *extra_ie_len;
 351                         struct dentry *auth_tries;
 352                         struct dentry *assoc_tries;
 353                         struct dentry *auth_algs;
 354                         struct dentry *auth_alg;
 355                         struct dentry *auth_transaction;
 356                         struct dentry *flags;
 357                 } sta;
 358                 struct {
 359                         struct dentry *channel_use;
 360                         struct dentry *drop_unencrypted;
 361                         struct dentry *eapol;
 362                         struct dentry *ieee8021_x;
 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 *eapol;
 377                         struct dentry *ieee8021_x;
 378                         struct dentry *peer;
 379                 } wds;
 380                 struct {
 381                         struct dentry *channel_use;
 382                         struct dentry *drop_unencrypted;
 383                         struct dentry *eapol;
 384                         struct dentry *ieee8021_x;
 385                 } vlan;
 386                 struct {
 387                         struct dentry *mode;
 388                 } monitor;
 389                 struct dentry *default_key;
 390         } debugfs;
 391 #endif
 392 };
 393
 394 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 395
 396 enum {
 397         IEEE80211_RX_MSG        = 1,
 398         IEEE80211_TX_STATUS_MSG = 2,
 399 };
 400
 401 struct ieee80211_local {
 402         /* embed the driver visible part.
 403          * don't cast (use the static inlines below), but we keep
 404          * it first anyway so they become a no-op */
 405         struct ieee80211_hw hw;
 406
 407         const struct ieee80211_ops *ops;
 408
 409         /* List of registered struct ieee80211_hw_mode */
 410         struct list_head modes_list;
 411
 412         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 413         struct net_device *apdev; /* wlan#ap - management frames (hostapd) */
 414         int open_count;
 415         int monitors;
 416         unsigned int filter_flags; /* FIF_* */
 417         struct iw_statistics wstats;
 418         u8 wstats_flags;
 419         int tx_headroom; /* required headroom for hardware/radiotap */
 420
 421         enum {
 422                 IEEE80211_DEV_UNINITIALIZED = 0,
 423                 IEEE80211_DEV_REGISTERED,
 424                 IEEE80211_DEV_UNREGISTERED,
 425         } reg_state;
 426
 427         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 428          * added to skb_queue will be processed, but frames in
 429          * skb_queue_unreliable may be dropped if the total length of these
 430          * queues increases over the limit. */
 431 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 432         struct tasklet_struct tasklet;
 433         struct sk_buff_head skb_queue;
 434         struct sk_buff_head skb_queue_unreliable;
 435
 436         /* Station data structures */
 437         rwlock_t sta_lock; /* protects STA data structures */
 438         int num_sta; /* number of stations in sta_list */
 439         struct list_head sta_list;
 440         struct sta_info *sta_hash[STA_HASH_SIZE];
 441         struct timer_list sta_cleanup;
 442
 443         unsigned long state[NUM_TX_DATA_QUEUES];
 444         struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES];
 445         struct tasklet_struct tx_pending_tasklet;
 446
 447         /* number of interfaces with corresponding IFF_ flags */
 448         atomic_t iff_allmultis, iff_promiscs;
 449
 450         struct rate_control_ref *rate_ctrl;
 451
 452         int next_mode; /* MODE_IEEE80211*
 453                         * The mode preference for next channel change. This is
 454                         * used to select .11g vs. .11b channels (or 4.9 GHz vs.
 455                         * .11a) when the channel number is not unique. */
 456
 457         /* Supported and basic rate filters for different modes. These are
 458          * pointers to -1 terminated lists and rates in 100 kbps units. */
 459         int *supp_rates[NUM_IEEE80211_MODES];
 460         int *basic_rates[NUM_IEEE80211_MODES];
 461
 462         int rts_threshold;
 463         int fragmentation_threshold;
 464         int short_retry_limit; /* dot11ShortRetryLimit */
 465         int long_retry_limit; /* dot11LongRetryLimit */
 466
 467         struct crypto_blkcipher *wep_tx_tfm;
 468         struct crypto_blkcipher *wep_rx_tfm;
 469         u32 wep_iv;
 470
 471         int bridge_packets; /* bridge packets between associated stations and
 472                              * deliver multicast frames both back to wireless
 473                              * media and to the local net stack */
 474
 475         ieee80211_rx_handler *rx_pre_handlers;
 476         ieee80211_rx_handler *rx_handlers;
 477         ieee80211_tx_handler *tx_handlers;
 478
 479         struct list_head interfaces;
 480
 481         int sta_scanning;
 482         int scan_channel_idx;
 483         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 484         unsigned long last_scan_completed;
 485         struct delayed_work scan_work;
 486         struct net_device *scan_dev;
 487         struct ieee80211_channel *oper_channel, *scan_channel;
 488         struct ieee80211_hw_mode *oper_hw_mode, *scan_hw_mode;
 489         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 490         size_t scan_ssid_len;
 491         struct list_head sta_bss_list;
 492         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 493         spinlock_t sta_bss_lock;
 494 #define IEEE80211_SCAN_MATCH_SSID BIT(0)
 495 #define IEEE80211_SCAN_WPA_ONLY BIT(1)
 496 #define IEEE80211_SCAN_EXTRA_INFO BIT(2)
 497         int scan_flags;
 498
 499         /* SNMP counters */
 500         /* dot11CountersTable */
 501         u32 dot11TransmittedFragmentCount;
 502         u32 dot11MulticastTransmittedFrameCount;
 503         u32 dot11FailedCount;
 504         u32 dot11RetryCount;
 505         u32 dot11MultipleRetryCount;
 506         u32 dot11FrameDuplicateCount;
 507         u32 dot11ReceivedFragmentCount;
 508         u32 dot11MulticastReceivedFrameCount;
 509         u32 dot11TransmittedFrameCount;
 510         u32 dot11WEPUndecryptableCount;
 511
 512 #ifdef CONFIG_MAC80211_LEDS
 513         int tx_led_counter, rx_led_counter;
 514         struct led_trigger *tx_led, *rx_led;
 515         char tx_led_name[32], rx_led_name[32];
 516 #endif
 517
 518         u32 channel_use;
 519         u32 channel_use_raw;
 520
 521 #ifdef CONFIG_MAC80211_DEBUGFS
 522         struct work_struct sta_debugfs_add;
 523 #endif
 524
 525 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 526         /* TX/RX handler statistics */
 527         unsigned int tx_handlers_drop;
 528         unsigned int tx_handlers_queued;
 529         unsigned int tx_handlers_drop_unencrypted;
 530         unsigned int tx_handlers_drop_fragment;
 531         unsigned int tx_handlers_drop_wep;
 532         unsigned int tx_handlers_drop_not_assoc;
 533         unsigned int tx_handlers_drop_unauth_port;
 534         unsigned int rx_handlers_drop;
 535         unsigned int rx_handlers_queued;
 536         unsigned int rx_handlers_drop_nullfunc;
 537         unsigned int rx_handlers_drop_defrag;
 538         unsigned int rx_handlers_drop_short;
 539         unsigned int rx_handlers_drop_passive_scan;
 540         unsigned int tx_expand_skb_head;
 541         unsigned int tx_expand_skb_head_cloned;
 542         unsigned int rx_expand_skb_head;
 543         unsigned int rx_expand_skb_head2;
 544         unsigned int rx_handlers_fragments;
 545         unsigned int tx_status_drop;
 546         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 547         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 548 #define I802_DEBUG_INC(c) (c)++
 549 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 550 #define I802_DEBUG_INC(c) do { } while (0)
 551 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 552
 553
 554         int total_ps_buffered; /* total number of all buffered unicast and
 555                                 * multicast packets for power saving stations
 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 *antenna_sel_tx;
 572                 struct dentry *antenna_sel_rx;
 573                 struct dentry *bridge_packets;
 574                 struct dentry *rts_threshold;
 575                 struct dentry *fragmentation_threshold;
 576                 struct dentry *short_retry_limit;
 577                 struct dentry *long_retry_limit;
 578                 struct dentry *total_ps_buffered;
 579                 struct dentry *mode;
 580                 struct dentry *wep_iv;
 581                 struct dentry *modes;
 582                 struct dentry *statistics;
 583                 struct local_debugfsdentries_statsdentries {
 584                         struct dentry *transmitted_fragment_count;
 585                         struct dentry *multicast_transmitted_frame_count;
 586                         struct dentry *failed_count;
 587                         struct dentry *retry_count;
 588                         struct dentry *multiple_retry_count;
 589                         struct dentry *frame_duplicate_count;
 590                         struct dentry *received_fragment_count;
 591                         struct dentry *multicast_received_frame_count;
 592                         struct dentry *transmitted_frame_count;
 593                         struct dentry *wep_undecryptable_count;
 594                         struct dentry *num_scans;
 595 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 596                         struct dentry *tx_handlers_drop;
 597                         struct dentry *tx_handlers_queued;
 598                         struct dentry *tx_handlers_drop_unencrypted;
 599                         struct dentry *tx_handlers_drop_fragment;
 600                         struct dentry *tx_handlers_drop_wep;
 601                         struct dentry *tx_handlers_drop_not_assoc;
 602                         struct dentry *tx_handlers_drop_unauth_port;
 603                         struct dentry *rx_handlers_drop;
 604                         struct dentry *rx_handlers_queued;
 605                         struct dentry *rx_handlers_drop_nullfunc;
 606                         struct dentry *rx_handlers_drop_defrag;
 607                         struct dentry *rx_handlers_drop_short;
 608                         struct dentry *rx_handlers_drop_passive_scan;
 609                         struct dentry *tx_expand_skb_head;
 610                         struct dentry *tx_expand_skb_head_cloned;
 611                         struct dentry *rx_expand_skb_head;
 612                         struct dentry *rx_expand_skb_head2;
 613                         struct dentry *rx_handlers_fragments;
 614                         struct dentry *tx_status_drop;
 615                         struct dentry *wme_tx_queue;
 616                         struct dentry *wme_rx_queue;
 617 #endif
 618                         struct dentry *dot11ACKFailureCount;
 619                         struct dentry *dot11RTSFailureCount;
 620                         struct dentry *dot11FCSErrorCount;
 621                         struct dentry *dot11RTSSuccessCount;
 622                 } stats;
 623                 struct dentry *stations;
 624                 struct dentry *keys;
 625         } debugfs;
 626 #endif
 627 };
 628
 629 static inline struct ieee80211_local *hw_to_local(
 630         struct ieee80211_hw *hw)
 631 {
 632         return container_of(hw, struct ieee80211_local, hw);
 633 }
 634
 635 static inline struct ieee80211_hw *local_to_hw(
 636         struct ieee80211_local *local)
 637 {
 638         return &local->hw;
 639 }
 640
 641 enum ieee80211_link_state_t {
 642         IEEE80211_LINK_STATE_XOFF = 0,
 643         IEEE80211_LINK_STATE_PENDING,
 644 };
 645
 646 struct sta_attribute {
 647         struct attribute attr;
 648         ssize_t (*show)(const struct sta_info *, char *buf);
 649         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 650 };
 651
 652 static inline void __bss_tim_set(struct ieee80211_if_ap *bss, int aid)
 653 {
 654         /*
 655          * This format has ben mandated by the IEEE specifications,
 656          * so this line may not be changed to use the __set_bit() format.
 657          */
 658         bss->tim[(aid)/8] |= 1<<((aid) % 8);
 659 }
 660
 661 static inline void bss_tim_set(struct ieee80211_local *local,
 662                                struct ieee80211_if_ap *bss, int aid)
 663 {
 664         read_lock_bh(&local->sta_lock);
 665         __bss_tim_set(bss, aid);
 666         read_unlock_bh(&local->sta_lock);
 667 }
 668
 669 static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, int aid)
 670 {
 671         /*
 672          * This format has ben mandated by the IEEE specifications,
 673          * so this line may not be changed to use the __clear_bit() format.
 674          */
 675         bss->tim[(aid)/8] &= !(1<<((aid) % 8));
 676 }
 677
 678 static inline void bss_tim_clear(struct ieee80211_local *local,
 679                                  struct ieee80211_if_ap *bss, int aid)
 680 {
 681         read_lock_bh(&local->sta_lock);
 682         __bss_tim_clear(bss, aid);
 683         read_unlock_bh(&local->sta_lock);
 684 }
 685
 686 /**
 687  * ieee80211_is_erp_rate - Check if a rate is an ERP rate
 688  * @phymode: The PHY-mode for this rate (MODE_IEEE80211...)
 689  * @rate: Transmission rate to check, in 100 kbps
 690  *
 691  * Check if a given rate is an Extended Rate PHY (ERP) rate.
 692  */
 693 static inline int ieee80211_is_erp_rate(int phymode, int rate)
 694 {
 695         if (phymode == MODE_IEEE80211G) {
 696                 if (rate != 10 && rate != 20 &&
 697                     rate != 55 && rate != 110)
 698                         return 1;
 699         }
 700         return 0;
 701 }
 702
 703 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 704 {
 705         return compare_ether_addr(raddr, addr) == 0 ||
 706                is_broadcast_ether_addr(raddr);
 707 }
 708
 709
 710 /* ieee80211.c */
 711 int ieee80211_hw_config(struct ieee80211_local *local);
 712 int ieee80211_if_config(struct net_device *dev);
 713 int ieee80211_if_config_beacon(struct net_device *dev);
 714 void ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 715                        struct ieee80211_rx_status *status, u32 msg_type);
 716 void ieee80211_prepare_rates(struct ieee80211_local *local,
 717                              struct ieee80211_hw_mode *mode);
 718 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
 719 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
 720 void ieee80211_if_setup(struct net_device *dev);
 721 void ieee80211_if_mgmt_setup(struct net_device *dev);
 722 struct ieee80211_rate *ieee80211_get_rate(struct ieee80211_local *local,
 723                                           int phymode, int hwrate);
 724
 725 /* ieee80211_ioctl.c */
 726 extern const struct iw_handler_def ieee80211_iw_handler_def;
 727
 728
 729 /* Least common multiple of the used rates (in 100 kbps). This is used to
 730  * calculate rate_inv values for each rate so that only integers are needed. */
 731 #define CHAN_UTIL_RATE_LCM 95040
 732 /* 1 usec is 1/8 * (95040/10) = 1188 */
 733 #define CHAN_UTIL_PER_USEC 1188
 734 /* Amount of bits to shift the result right to scale the total utilization
 735  * to values that will not wrap around 32-bit integers. */
 736 #define CHAN_UTIL_SHIFT 9
 737 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 738  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 739  * raw value with about 23 should give utilization in 10th of a percentage
 740  * (1/1000). However, utilization is only estimated and not all intervals
 741  * between frames etc. are calculated. 18 seems to give numbers that are closer
 742  * to the real maximum. */
 743 #define CHAN_UTIL_PER_10MS 18
 744 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 745 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 746
 747
 748 /* ieee80211_ioctl.c */
 749 int ieee80211_set_compression(struct ieee80211_local *local,
 750                               struct net_device *dev, struct sta_info *sta);
 751 int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq);
 752 /* ieee80211_sta.c */
 753 void ieee80211_sta_timer(unsigned long data);
 754 void ieee80211_sta_work(struct work_struct *work);
 755 void ieee80211_sta_scan_work(struct work_struct *work);
 756 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 757                            struct ieee80211_rx_status *rx_status);
 758 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 759 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 760 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 761 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 762 void ieee80211_sta_req_auth(struct net_device *dev,
 763                             struct ieee80211_if_sta *ifsta);
 764 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 765 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
 766                            struct ieee80211_rx_status *rx_status);
 767 void ieee80211_rx_bss_list_init(struct net_device *dev);
 768 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 769 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 770 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 771                                          struct sk_buff *skb, u8 *bssid,
 772                                          u8 *addr);
 773 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 774 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 775 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
 776 void ieee80211_reset_erp_info(struct net_device *dev);
 777
 778 /* ieee80211_iface.c */
 779 int ieee80211_if_add(struct net_device *dev, const char *name,
 780                      struct net_device **new_dev, int type);
 781 void ieee80211_if_set_type(struct net_device *dev, int type);
 782 void ieee80211_if_reinit(struct net_device *dev);
 783 void __ieee80211_if_del(struct ieee80211_local *local,
 784                         struct ieee80211_sub_if_data *sdata);
 785 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 786 void ieee80211_if_free(struct net_device *dev);
 787 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 788 int ieee80211_if_add_mgmt(struct ieee80211_local *local);
 789 void ieee80211_if_del_mgmt(struct ieee80211_local *local);
 790
 791 /* regdomain.c */
 792 void ieee80211_regdomain_init(void);
 793 void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode);
 794
 795 /* rx handling */
 796 extern ieee80211_rx_handler ieee80211_rx_pre_handlers[];
 797 extern ieee80211_rx_handler ieee80211_rx_handlers[];
 798
 799 /* tx handling */
 800 extern ieee80211_tx_handler ieee80211_tx_handlers[];
 801 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 802 void ieee80211_tx_pending(unsigned long data);
 803 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 804 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 805 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 806 int ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev);
 807
 808 /* utility functions/constants */
 809 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 810 extern const unsigned char rfc1042_header[6];
 811 extern const unsigned char bridge_tunnel_header[6];
 812 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
 813 int ieee80211_is_eapol(const struct sk_buff *skb);
 814 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 815                              int rate, int erp, int short_preamble);
 816 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 817                                      struct ieee80211_hdr *hdr);
 818
 819 #endif /* IEEE80211_I_H */