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                 } rx;
 157         } u;
 158 };
 159
 160 /* flags used in struct ieee80211_tx_packet_data.flags */
 161 #define IEEE80211_TXPD_REQ_TX_STATUS    BIT(0)
 162 #define IEEE80211_TXPD_DO_NOT_ENCRYPT   BIT(1)
 163 #define IEEE80211_TXPD_REQUEUE          BIT(2)
 164 #define IEEE80211_TXPD_MGMT_IFACE       BIT(3)
 165 /* Stored in sk_buff->cb */
 166 struct ieee80211_tx_packet_data {
 167         int ifindex;
 168         unsigned long jiffies;
 169         unsigned int flags;
 170         u8 queue;
 171 };
 172
 173 struct ieee80211_tx_stored_packet {
 174         struct ieee80211_tx_control control;
 175         struct sk_buff *skb;
 176         int num_extra_frag;
 177         struct sk_buff **extra_frag;
 178         int last_frag_rateidx;
 179         int last_frag_hwrate;
 180         struct ieee80211_rate *last_frag_rate;
 181         unsigned int last_frag_rate_ctrl_probe;
 182 };
 183
 184 typedef ieee80211_txrx_result (*ieee80211_tx_handler)
 185 (struct ieee80211_txrx_data *tx);
 186
 187 typedef ieee80211_txrx_result (*ieee80211_rx_handler)
 188 (struct ieee80211_txrx_data *rx);
 189
 190 struct ieee80211_if_ap {
 191         u8 *beacon_head, *beacon_tail;
 192         int beacon_head_len, beacon_tail_len;
 193
 194         u8 ssid[IEEE80211_MAX_SSID_LEN];
 195         size_t ssid_len;
 196         u8 *generic_elem;
 197         size_t generic_elem_len;
 198
 199         /* yes, this looks ugly, but guarantees that we can later use
 200          * bitmap_empty :)
 201          * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */
 202         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 203         atomic_t num_sta_ps; /* number of stations in PS mode */
 204         struct sk_buff_head ps_bc_buf;
 205         int dtim_period, dtim_count;
 206         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 207         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 208         int num_beacons; /* number of TXed beacon frames for this BSS */
 209 };
 210
 211 struct ieee80211_if_wds {
 212         u8 remote_addr[ETH_ALEN];
 213         struct sta_info *sta;
 214 };
 215
 216 struct ieee80211_if_vlan {
 217         u8 id;
 218 };
 219
 220 /* flags used in struct ieee80211_if_sta.flags */
 221 #define IEEE80211_STA_SSID_SET          BIT(0)
 222 #define IEEE80211_STA_BSSID_SET         BIT(1)
 223 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 224 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 225 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 226 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 227 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 228 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 229 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 230 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 231 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 232 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 233 struct ieee80211_if_sta {
 234         enum {
 235                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 236                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 237                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED
 238         } state;
 239         struct timer_list timer;
 240         struct work_struct work;
 241         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 242         u8 ssid[IEEE80211_MAX_SSID_LEN];
 243         size_t ssid_len;
 244         u16 aid;
 245         u16 ap_capab, capab;
 246         u8 *extra_ie; /* to be added to the end of AssocReq */
 247         size_t extra_ie_len;
 248
 249         /* The last AssocReq/Resp IEs */
 250         u8 *assocreq_ies, *assocresp_ies;
 251         size_t assocreq_ies_len, assocresp_ies_len;
 252
 253         int auth_tries, assoc_tries;
 254
 255         unsigned int flags;
 256 #define IEEE80211_STA_REQ_SCAN 0
 257 #define IEEE80211_STA_REQ_AUTH 1
 258 #define IEEE80211_STA_REQ_RUN  2
 259         unsigned long request;
 260         struct sk_buff_head skb_queue;
 261
 262         int key_management_enabled;
 263         unsigned long last_probe;
 264
 265 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 266 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 267 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 268         unsigned int auth_algs; /* bitfield of allowed auth algs */
 269         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 270         int auth_transaction;
 271
 272         unsigned long ibss_join_req;
 273         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 274         u32 supp_rates_bits;
 275
 276         int wmm_last_param_set;
 277 };
 278
 279
 280 /* flags used in struct ieee80211_sub_if_data.flags */
 281 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 282 #define IEEE80211_SDATA_PROMISC         BIT(1)
 283 #define IEEE80211_SDATA_USE_PROTECTION  BIT(2) /* CTS protect ERP frames */
 284 /* use short preamble with IEEE 802.11b: this flag is set when the AP or beacon
 285  * generator reports that there are no present stations that cannot support short
 286  * preambles */
 287 #define IEEE80211_SDATA_SHORT_PREAMBLE  BIT(3)
 288 struct ieee80211_sub_if_data {
 289         struct list_head list;
 290         unsigned int type;
 291
 292         struct wireless_dev wdev;
 293
 294         /* keys */
 295         struct list_head key_list;
 296
 297         struct net_device *dev;
 298         struct ieee80211_local *local;
 299
 300         int mc_count;
 301
 302         unsigned int flags;
 303
 304         int drop_unencrypted;
 305         int eapol; /* 0 = process EAPOL frames as normal data frames,
 306                     * 1 = send EAPOL frames through wlan#ap to hostapd
 307                     *     (default) */
 308         int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized
 309                          * port */
 310
 311         u16 sequence;
 312
 313         /* Fragment table for host-based reassembly */
 314         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 315         unsigned int fragment_next;
 316
 317 #define NUM_DEFAULT_KEYS 4
 318         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 319         struct ieee80211_key *default_key;
 320
 321         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 322
 323         union {
 324                 struct ieee80211_if_ap ap;
 325                 struct ieee80211_if_wds wds;
 326                 struct ieee80211_if_vlan vlan;
 327                 struct ieee80211_if_sta sta;
 328         } u;
 329         int channel_use;
 330         int channel_use_raw;
 331
 332 #ifdef CONFIG_MAC80211_DEBUGFS
 333         struct dentry *debugfsdir;
 334         union {
 335                 struct {
 336                         struct dentry *channel_use;
 337                         struct dentry *drop_unencrypted;
 338                         struct dentry *eapol;
 339                         struct dentry *ieee8021_x;
 340                         struct dentry *state;
 341                         struct dentry *bssid;
 342                         struct dentry *prev_bssid;
 343                         struct dentry *ssid_len;
 344                         struct dentry *aid;
 345                         struct dentry *ap_capab;
 346                         struct dentry *capab;
 347                         struct dentry *extra_ie_len;
 348                         struct dentry *auth_tries;
 349                         struct dentry *assoc_tries;
 350                         struct dentry *auth_algs;
 351                         struct dentry *auth_alg;
 352                         struct dentry *auth_transaction;
 353                         struct dentry *flags;
 354                 } sta;
 355                 struct {
 356                         struct dentry *channel_use;
 357                         struct dentry *drop_unencrypted;
 358                         struct dentry *eapol;
 359                         struct dentry *ieee8021_x;
 360                         struct dentry *num_sta_ps;
 361                         struct dentry *dtim_period;
 362                         struct dentry *dtim_count;
 363                         struct dentry *num_beacons;
 364                         struct dentry *force_unicast_rateidx;
 365                         struct dentry *max_ratectrl_rateidx;
 366                         struct dentry *num_buffered_multicast;
 367                         struct dentry *beacon_head_len;
 368                         struct dentry *beacon_tail_len;
 369                 } ap;
 370                 struct {
 371                         struct dentry *channel_use;
 372                         struct dentry *drop_unencrypted;
 373                         struct dentry *eapol;
 374                         struct dentry *ieee8021_x;
 375                         struct dentry *peer;
 376                 } wds;
 377                 struct {
 378                         struct dentry *channel_use;
 379                         struct dentry *drop_unencrypted;
 380                         struct dentry *eapol;
 381                         struct dentry *ieee8021_x;
 382                         struct dentry *vlan_id;
 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         struct net_device *apdev; /* wlan#ap - management frames (hostapd) */
 412         int open_count;
 413         int monitors;
 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         int mc_count;   /* total count of multicast entries in all interfaces */
 445         int iff_allmultis, iff_promiscs;
 446                         /* number of interfaces with corresponding IFF_ flags */
 447
 448         struct rate_control_ref *rate_ctrl;
 449
 450         int next_mode; /* MODE_IEEE80211*
 451                         * The mode preference for next channel change. This is
 452                         * used to select .11g vs. .11b channels (or 4.9 GHz vs.
 453                         * .11a) when the channel number is not unique. */
 454
 455         /* Supported and basic rate filters for different modes. These are
 456          * pointers to -1 terminated lists and rates in 100 kbps units. */
 457         int *supp_rates[NUM_IEEE80211_MODES];
 458         int *basic_rates[NUM_IEEE80211_MODES];
 459
 460         int rts_threshold;
 461         int fragmentation_threshold;
 462         int short_retry_limit; /* dot11ShortRetryLimit */
 463         int long_retry_limit; /* dot11LongRetryLimit */
 464
 465         struct crypto_blkcipher *wep_tx_tfm;
 466         struct crypto_blkcipher *wep_rx_tfm;
 467         u32 wep_iv;
 468
 469         int bridge_packets; /* bridge packets between associated stations and
 470                              * deliver multicast frames both back to wireless
 471                              * media and to the local net stack */
 472
 473         ieee80211_rx_handler *rx_pre_handlers;
 474         ieee80211_rx_handler *rx_handlers;
 475         ieee80211_tx_handler *tx_handlers;
 476
 477         rwlock_t sub_if_lock; /* Protects sub_if_list. Cannot be taken under
 478                                * sta_bss_lock or sta_lock. */
 479         struct list_head sub_if_list;
 480         int sta_scanning;
 481         int scan_channel_idx;
 482         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 483         unsigned long last_scan_completed;
 484         struct delayed_work scan_work;
 485         struct net_device *scan_dev;
 486         struct ieee80211_channel *oper_channel, *scan_channel;
 487         struct ieee80211_hw_mode *oper_hw_mode, *scan_hw_mode;
 488         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 489         size_t scan_ssid_len;
 490         struct list_head sta_bss_list;
 491         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 492         spinlock_t sta_bss_lock;
 493 #define IEEE80211_SCAN_MATCH_SSID BIT(0)
 494 #define IEEE80211_SCAN_WPA_ONLY BIT(1)
 495 #define IEEE80211_SCAN_EXTRA_INFO BIT(2)
 496         int scan_flags;
 497
 498         /* SNMP counters */
 499         /* dot11CountersTable */
 500         u32 dot11TransmittedFragmentCount;
 501         u32 dot11MulticastTransmittedFrameCount;
 502         u32 dot11FailedCount;
 503         u32 dot11RetryCount;
 504         u32 dot11MultipleRetryCount;
 505         u32 dot11FrameDuplicateCount;
 506         u32 dot11ReceivedFragmentCount;
 507         u32 dot11MulticastReceivedFrameCount;
 508         u32 dot11TransmittedFrameCount;
 509         u32 dot11WEPUndecryptableCount;
 510
 511 #ifdef CONFIG_MAC80211_LEDS
 512         int tx_led_counter, rx_led_counter;
 513         struct led_trigger *tx_led, *rx_led;
 514         char tx_led_name[32], rx_led_name[32];
 515 #endif
 516
 517         u32 channel_use;
 518         u32 channel_use_raw;
 519
 520 #ifdef CONFIG_MAC80211_DEBUGFS
 521         struct work_struct sta_debugfs_add;
 522 #endif
 523
 524 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 525         /* TX/RX handler statistics */
 526         unsigned int tx_handlers_drop;
 527         unsigned int tx_handlers_queued;
 528         unsigned int tx_handlers_drop_unencrypted;
 529         unsigned int tx_handlers_drop_fragment;
 530         unsigned int tx_handlers_drop_wep;
 531         unsigned int tx_handlers_drop_not_assoc;
 532         unsigned int tx_handlers_drop_unauth_port;
 533         unsigned int rx_handlers_drop;
 534         unsigned int rx_handlers_queued;
 535         unsigned int rx_handlers_drop_nullfunc;
 536         unsigned int rx_handlers_drop_defrag;
 537         unsigned int rx_handlers_drop_short;
 538         unsigned int rx_handlers_drop_passive_scan;
 539         unsigned int tx_expand_skb_head;
 540         unsigned int tx_expand_skb_head_cloned;
 541         unsigned int rx_expand_skb_head;
 542         unsigned int rx_expand_skb_head2;
 543         unsigned int rx_handlers_fragments;
 544         unsigned int tx_status_drop;
 545         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 546         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 547 #define I802_DEBUG_INC(c) (c)++
 548 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 549 #define I802_DEBUG_INC(c) do { } while (0)
 550 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 551
 552
 553         int total_ps_buffered; /* total number of all buffered unicast and
 554                                 * multicast packets for power saving stations
 555                                 */
 556         int wifi_wme_noack_test;
 557         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 558
 559         unsigned int enabled_modes; /* bitfield of allowed modes;
 560                                       * (1 << MODE_*) */
 561         unsigned int hw_modes; /* bitfield of supported hardware modes;
 562                                 * (1 << MODE_*) */
 563
 564         int user_space_mlme;
 565
 566 #ifdef CONFIG_MAC80211_DEBUGFS
 567         struct local_debugfsdentries {
 568                 struct dentry *channel;
 569                 struct dentry *frequency;
 570                 struct dentry *antenna_sel_tx;
 571                 struct dentry *antenna_sel_rx;
 572                 struct dentry *bridge_packets;
 573                 struct dentry *rts_threshold;
 574                 struct dentry *fragmentation_threshold;
 575                 struct dentry *short_retry_limit;
 576                 struct dentry *long_retry_limit;
 577                 struct dentry *total_ps_buffered;
 578                 struct dentry *mode;
 579                 struct dentry *wep_iv;
 580                 struct dentry *modes;
 581                 struct dentry *statistics;
 582                 struct local_debugfsdentries_statsdentries {
 583                         struct dentry *transmitted_fragment_count;
 584                         struct dentry *multicast_transmitted_frame_count;
 585                         struct dentry *failed_count;
 586                         struct dentry *retry_count;
 587                         struct dentry *multiple_retry_count;
 588                         struct dentry *frame_duplicate_count;
 589                         struct dentry *received_fragment_count;
 590                         struct dentry *multicast_received_frame_count;
 591                         struct dentry *transmitted_frame_count;
 592                         struct dentry *wep_undecryptable_count;
 593                         struct dentry *num_scans;
 594 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 595                         struct dentry *tx_handlers_drop;
 596                         struct dentry *tx_handlers_queued;
 597                         struct dentry *tx_handlers_drop_unencrypted;
 598                         struct dentry *tx_handlers_drop_fragment;
 599                         struct dentry *tx_handlers_drop_wep;
 600                         struct dentry *tx_handlers_drop_not_assoc;
 601                         struct dentry *tx_handlers_drop_unauth_port;
 602                         struct dentry *rx_handlers_drop;
 603                         struct dentry *rx_handlers_queued;
 604                         struct dentry *rx_handlers_drop_nullfunc;
 605                         struct dentry *rx_handlers_drop_defrag;
 606                         struct dentry *rx_handlers_drop_short;
 607                         struct dentry *rx_handlers_drop_passive_scan;
 608                         struct dentry *tx_expand_skb_head;
 609                         struct dentry *tx_expand_skb_head_cloned;
 610                         struct dentry *rx_expand_skb_head;
 611                         struct dentry *rx_expand_skb_head2;
 612                         struct dentry *rx_handlers_fragments;
 613                         struct dentry *tx_status_drop;
 614                         struct dentry *wme_tx_queue;
 615                         struct dentry *wme_rx_queue;
 616 #endif
 617                         struct dentry *dot11ACKFailureCount;
 618                         struct dentry *dot11RTSFailureCount;
 619                         struct dentry *dot11FCSErrorCount;
 620                         struct dentry *dot11RTSSuccessCount;
 621                 } stats;
 622                 struct dentry *stations;
 623                 struct dentry *keys;
 624         } debugfs;
 625 #endif
 626 };
 627
 628 static inline struct ieee80211_local *hw_to_local(
 629         struct ieee80211_hw *hw)
 630 {
 631         return container_of(hw, struct ieee80211_local, hw);
 632 }
 633
 634 static inline struct ieee80211_hw *local_to_hw(
 635         struct ieee80211_local *local)
 636 {
 637         return &local->hw;
 638 }
 639
 640 enum ieee80211_link_state_t {
 641         IEEE80211_LINK_STATE_XOFF = 0,
 642         IEEE80211_LINK_STATE_PENDING,
 643 };
 644
 645 struct sta_attribute {
 646         struct attribute attr;
 647         ssize_t (*show)(const struct sta_info *, char *buf);
 648         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 649 };
 650
 651 static inline void __bss_tim_set(struct ieee80211_if_ap *bss, int aid)
 652 {
 653         /*
 654          * This format has ben mandated by the IEEE specifications,
 655          * so this line may not be changed to use the __set_bit() format.
 656          */
 657         bss->tim[(aid)/8] |= 1<<((aid) % 8);
 658 }
 659
 660 static inline void bss_tim_set(struct ieee80211_local *local,
 661                                struct ieee80211_if_ap *bss, int aid)
 662 {
 663         read_lock_bh(&local->sta_lock);
 664         __bss_tim_set(bss, aid);
 665         read_unlock_bh(&local->sta_lock);
 666 }
 667
 668 static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, int aid)
 669 {
 670         /*
 671          * This format has ben mandated by the IEEE specifications,
 672          * so this line may not be changed to use the __clear_bit() format.
 673          */
 674         bss->tim[(aid)/8] &= !(1<<((aid) % 8));
 675 }
 676
 677 static inline void bss_tim_clear(struct ieee80211_local *local,
 678                                  struct ieee80211_if_ap *bss, int aid)
 679 {
 680         read_lock_bh(&local->sta_lock);
 681         __bss_tim_clear(bss, aid);
 682         read_unlock_bh(&local->sta_lock);
 683 }
 684
 685 /**
 686  * ieee80211_is_erp_rate - Check if a rate is an ERP rate
 687  * @phymode: The PHY-mode for this rate (MODE_IEEE80211...)
 688  * @rate: Transmission rate to check, in 100 kbps
 689  *
 690  * Check if a given rate is an Extended Rate PHY (ERP) rate.
 691  */
 692 static inline int ieee80211_is_erp_rate(int phymode, int rate)
 693 {
 694         if (phymode == MODE_IEEE80211G) {
 695                 if (rate != 10 && rate != 20 &&
 696                     rate != 55 && rate != 110)
 697                         return 1;
 698         }
 699         return 0;
 700 }
 701
 702 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 703 {
 704         return compare_ether_addr(raddr, addr) == 0 ||
 705                is_broadcast_ether_addr(raddr);
 706 }
 707
 708
 709 /* ieee80211.c */
 710 int ieee80211_hw_config(struct ieee80211_local *local);
 711 int ieee80211_if_config(struct net_device *dev);
 712 int ieee80211_if_config_beacon(struct net_device *dev);
 713 void ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 714                        struct ieee80211_rx_status *status, u32 msg_type);
 715 void ieee80211_prepare_rates(struct ieee80211_local *local,
 716                              struct ieee80211_hw_mode *mode);
 717 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
 718 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
 719 void ieee80211_if_setup(struct net_device *dev);
 720 void ieee80211_if_mgmt_setup(struct net_device *dev);
 721 struct ieee80211_rate *ieee80211_get_rate(struct ieee80211_local *local,
 722                                           int phymode, int hwrate);
 723
 724 /* ieee80211_ioctl.c */
 725 extern const struct iw_handler_def ieee80211_iw_handler_def;
 726
 727
 728 /* Least common multiple of the used rates (in 100 kbps). This is used to
 729  * calculate rate_inv values for each rate so that only integers are needed. */
 730 #define CHAN_UTIL_RATE_LCM 95040
 731 /* 1 usec is 1/8 * (95040/10) = 1188 */
 732 #define CHAN_UTIL_PER_USEC 1188
 733 /* Amount of bits to shift the result right to scale the total utilization
 734  * to values that will not wrap around 32-bit integers. */
 735 #define CHAN_UTIL_SHIFT 9
 736 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 737  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 738  * raw value with about 23 should give utilization in 10th of a percentage
 739  * (1/1000). However, utilization is only estimated and not all intervals
 740  * between frames etc. are calculated. 18 seems to give numbers that are closer
 741  * to the real maximum. */
 742 #define CHAN_UTIL_PER_10MS 18
 743 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 744 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 745
 746
 747 /* ieee80211_ioctl.c */
 748 int ieee80211_set_compression(struct ieee80211_local *local,
 749                               struct net_device *dev, struct sta_info *sta);
 750 int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq);
 751 /* ieee80211_sta.c */
 752 void ieee80211_sta_timer(unsigned long data);
 753 void ieee80211_sta_work(struct work_struct *work);
 754 void ieee80211_sta_scan_work(struct work_struct *work);
 755 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 756                            struct ieee80211_rx_status *rx_status);
 757 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 758 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 759 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 760 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 761 void ieee80211_sta_req_auth(struct net_device *dev,
 762                             struct ieee80211_if_sta *ifsta);
 763 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 764 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
 765                            struct ieee80211_rx_status *rx_status);
 766 void ieee80211_rx_bss_list_init(struct net_device *dev);
 767 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 768 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 769 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 770                                          struct sk_buff *skb, u8 *bssid,
 771                                          u8 *addr);
 772 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 773 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 774 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
 775 void ieee80211_reset_erp_info(struct net_device *dev);
 776
 777 /* ieee80211_iface.c */
 778 int ieee80211_if_add(struct net_device *dev, const char *name,
 779                      struct net_device **new_dev, int type);
 780 void ieee80211_if_set_type(struct net_device *dev, int type);
 781 void ieee80211_if_reinit(struct net_device *dev);
 782 void __ieee80211_if_del(struct ieee80211_local *local,
 783                         struct ieee80211_sub_if_data *sdata);
 784 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 785 void ieee80211_if_free(struct net_device *dev);
 786 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 787 int ieee80211_if_add_mgmt(struct ieee80211_local *local);
 788 void ieee80211_if_del_mgmt(struct ieee80211_local *local);
 789
 790 /* regdomain.c */
 791 void ieee80211_regdomain_init(void);
 792 void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode);
 793
 794 /* rx handling */
 795 extern ieee80211_rx_handler ieee80211_rx_pre_handlers[];
 796 extern ieee80211_rx_handler ieee80211_rx_handlers[];
 797
 798 /* tx handling */
 799 extern ieee80211_tx_handler ieee80211_tx_handlers[];
 800 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 801 void ieee80211_tx_pending(unsigned long data);
 802 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 803 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 804 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 805 int ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev);
 806
 807 /* utility functions/constants */
 808 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 809 extern const unsigned char rfc1042_header[6];
 810 extern const unsigned char bridge_tunnel_header[6];
 811 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
 812 int ieee80211_is_eapol(const struct sk_buff *skb);
 813 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 814                              int rate, int erp, int short_preamble);
 815 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 816                                      struct ieee80211_hdr *hdr);
 817
 818 #endif /* IEEE80211_I_H */