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         enum ieee80211_band band;
  83         int freq;
  84         int rssi, signal, noise;
  85         u8 *wpa_ie;
  86         size_t wpa_ie_len;
  87         u8 *rsn_ie;
  88         size_t rsn_ie_len;
  89         u8 *wmm_ie;
  90         size_t wmm_ie_len;
  91         u8 *ht_ie;
  92         size_t ht_ie_len;
  93 #define IEEE80211_MAX_SUPP_RATES 32
  94         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  95         size_t supp_rates_len;
  96         int beacon_int;
  97         u64 timestamp;
  98
  99         int probe_resp;
 100         unsigned long last_update;
 101
 102         /* during assocation, we save an ERP value from a probe response so
 103          * that we can feed ERP info to the driver when handling the
 104          * association completes. these fields probably won't be up-to-date
 105          * otherwise, you probably don't want to use them. */
 106         int has_erp_value;
 107         u8 erp_value;
 108 };
 109
 110
 111 typedef enum {
 112         TXRX_CONTINUE, TXRX_DROP, TXRX_QUEUED
 113 } ieee80211_txrx_result;
 114
 115 /* flags used in struct ieee80211_txrx_data.flags */
 116 /* whether the MSDU was fragmented */
 117 #define IEEE80211_TXRXD_FRAGMENTED              BIT(0)
 118 #define IEEE80211_TXRXD_TXUNICAST               BIT(1)
 119 #define IEEE80211_TXRXD_TXPS_BUFFERED           BIT(2)
 120 #define IEEE80211_TXRXD_TXPROBE_LAST_FRAG       BIT(3)
 121 #define IEEE80211_TXRXD_RXIN_SCAN               BIT(4)
 122 /* frame is destined to interface currently processed (incl. multicast frames) */
 123 #define IEEE80211_TXRXD_RXRA_MATCH              BIT(5)
 124 #define IEEE80211_TXRXD_TX_INJECTED             BIT(6)
 125 #define IEEE80211_TXRXD_RX_AMSDU                BIT(7)
 126 struct ieee80211_txrx_data {
 127         struct sk_buff *skb;
 128         struct net_device *dev;
 129         struct ieee80211_local *local;
 130         struct ieee80211_sub_if_data *sdata;
 131         struct sta_info *sta;
 132         u16 fc, ethertype;
 133         struct ieee80211_key *key;
 134         unsigned int flags;
 135         union {
 136                 struct {
 137                         struct ieee80211_tx_control *control;
 138                         struct ieee80211_channel *channel;
 139                         struct ieee80211_rate *rate;
 140                         /* use this rate (if set) for last fragment; rate can
 141                          * be set to lower rate for the first fragments, e.g.,
 142                          * when using CTS protection with IEEE 802.11g. */
 143                         struct ieee80211_rate *last_frag_rate;
 144
 145                         /* Extra fragments (in addition to the first fragment
 146                          * in skb) */
 147                         int num_extra_frag;
 148                         struct sk_buff **extra_frag;
 149                 } tx;
 150                 struct {
 151                         struct ieee80211_rx_status *status;
 152                         struct ieee80211_rate *rate;
 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_EAPOL_FRAME      BIT(3)
 167 #define IEEE80211_TXPD_AMPDU            BIT(4)
 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         struct ieee80211_rate *last_frag_rate;
 182         unsigned int last_frag_rate_ctrl_probe;
 183 };
 184
 185 typedef ieee80211_txrx_result (*ieee80211_tx_handler)
 186 (struct ieee80211_txrx_data *tx);
 187
 188 typedef ieee80211_txrx_result (*ieee80211_rx_handler)
 189 (struct ieee80211_txrx_data *rx);
 190
 191 struct beacon_data {
 192         u8 *head, *tail;
 193         int head_len, tail_len;
 194         int dtim_period;
 195 };
 196
 197 struct ieee80211_if_ap {
 198         struct beacon_data *beacon;
 199
 200         struct list_head vlans;
 201
 202         u8 ssid[IEEE80211_MAX_SSID_LEN];
 203         size_t ssid_len;
 204
 205         /* yes, this looks ugly, but guarantees that we can later use
 206          * bitmap_empty :)
 207          * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */
 208         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 209         atomic_t num_sta_ps; /* number of stations in PS mode */
 210         struct sk_buff_head ps_bc_buf;
 211         int dtim_count;
 212         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 213         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 214         int num_beacons; /* number of TXed beacon frames for this BSS */
 215 };
 216
 217 struct ieee80211_if_wds {
 218         u8 remote_addr[ETH_ALEN];
 219         struct sta_info *sta;
 220 };
 221
 222 struct ieee80211_if_vlan {
 223         struct ieee80211_sub_if_data *ap;
 224         struct list_head list;
 225 };
 226
 227 /* flags used in struct ieee80211_if_sta.flags */
 228 #define IEEE80211_STA_SSID_SET          BIT(0)
 229 #define IEEE80211_STA_BSSID_SET         BIT(1)
 230 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 231 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 232 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 233 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 234 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 235 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 236 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 237 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 238 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 239 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 240 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 241 struct ieee80211_if_sta {
 242         enum {
 243                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 244                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 245                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED
 246         } state;
 247         struct timer_list timer;
 248         struct work_struct work;
 249         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 250         u8 ssid[IEEE80211_MAX_SSID_LEN];
 251         size_t ssid_len;
 252         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 253         size_t scan_ssid_len;
 254         u16 aid;
 255         u16 ap_capab, capab;
 256         u8 *extra_ie; /* to be added to the end of AssocReq */
 257         size_t extra_ie_len;
 258
 259         /* The last AssocReq/Resp IEs */
 260         u8 *assocreq_ies, *assocresp_ies;
 261         size_t assocreq_ies_len, assocresp_ies_len;
 262
 263         int auth_tries, assoc_tries;
 264
 265         unsigned int flags;
 266 #define IEEE80211_STA_REQ_SCAN 0
 267 #define IEEE80211_STA_REQ_AUTH 1
 268 #define IEEE80211_STA_REQ_RUN  2
 269         unsigned long request;
 270         struct sk_buff_head skb_queue;
 271
 272         unsigned long last_probe;
 273
 274 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 275 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 276 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 277         unsigned int auth_algs; /* bitfield of allowed auth algs */
 278         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 279         int auth_transaction;
 280
 281         unsigned long ibss_join_req;
 282         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 283         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 284
 285         int wmm_last_param_set;
 286 };
 287
 288
 289 /* flags used in struct ieee80211_sub_if_data.flags */
 290 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 291 #define IEEE80211_SDATA_PROMISC         BIT(1)
 292 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 293 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 294 struct ieee80211_sub_if_data {
 295         struct list_head list;
 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
 309         /*
 310          * basic rates of this AP or the AP we're associated to
 311          */
 312         u64 basic_rates;
 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         /*
 325          * BSS configuration for this interface.
 326          *
 327          * FIXME: I feel bad putting this here when we already have a
 328          *        bss pointer, but the bss pointer is just wrong when
 329          *        you have multiple virtual STA mode interfaces...
 330          *        This needs to be fixed.
 331          */
 332         struct ieee80211_bss_conf bss_conf;
 333         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 334
 335         union {
 336                 struct ieee80211_if_ap ap;
 337                 struct ieee80211_if_wds wds;
 338                 struct ieee80211_if_vlan vlan;
 339                 struct ieee80211_if_sta sta;
 340         } u;
 341         int channel_use;
 342         int channel_use_raw;
 343
 344 #ifdef CONFIG_MAC80211_DEBUGFS
 345         struct dentry *debugfsdir;
 346         union {
 347                 struct {
 348                         struct dentry *channel_use;
 349                         struct dentry *drop_unencrypted;
 350                         struct dentry *state;
 351                         struct dentry *bssid;
 352                         struct dentry *prev_bssid;
 353                         struct dentry *ssid_len;
 354                         struct dentry *aid;
 355                         struct dentry *ap_capab;
 356                         struct dentry *capab;
 357                         struct dentry *extra_ie_len;
 358                         struct dentry *auth_tries;
 359                         struct dentry *assoc_tries;
 360                         struct dentry *auth_algs;
 361                         struct dentry *auth_alg;
 362                         struct dentry *auth_transaction;
 363                         struct dentry *flags;
 364                 } sta;
 365                 struct {
 366                         struct dentry *channel_use;
 367                         struct dentry *drop_unencrypted;
 368                         struct dentry *num_sta_ps;
 369                         struct dentry *dtim_count;
 370                         struct dentry *num_beacons;
 371                         struct dentry *force_unicast_rateidx;
 372                         struct dentry *max_ratectrl_rateidx;
 373                         struct dentry *num_buffered_multicast;
 374                 } ap;
 375                 struct {
 376                         struct dentry *channel_use;
 377                         struct dentry *drop_unencrypted;
 378                         struct dentry *peer;
 379                 } wds;
 380                 struct {
 381                         struct dentry *channel_use;
 382                         struct dentry *drop_unencrypted;
 383                 } vlan;
 384                 struct {
 385                         struct dentry *mode;
 386                 } monitor;
 387                 struct dentry *default_key;
 388         } debugfs;
 389 #endif
 390         /* must be last, dynamically sized area in this! */
 391         struct ieee80211_vif vif;
 392 };
 393
 394 static inline
 395 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 396 {
 397         return container_of(p, struct ieee80211_sub_if_data, vif);
 398 }
 399
 400 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 401
 402 enum {
 403         IEEE80211_RX_MSG        = 1,
 404         IEEE80211_TX_STATUS_MSG = 2,
 405         IEEE80211_DELBA_MSG     = 3,
 406         IEEE80211_ADDBA_MSG     = 4,
 407 };
 408
 409 struct ieee80211_local {
 410         /* embed the driver visible part.
 411          * don't cast (use the static inlines below), but we keep
 412          * it first anyway so they become a no-op */
 413         struct ieee80211_hw hw;
 414
 415         const struct ieee80211_ops *ops;
 416
 417         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 418         int open_count;
 419         int monitors;
 420         unsigned int filter_flags; /* FIF_* */
 421         struct iw_statistics wstats;
 422         u8 wstats_flags;
 423         int tx_headroom; /* required headroom for hardware/radiotap */
 424
 425         enum {
 426                 IEEE80211_DEV_UNINITIALIZED = 0,
 427                 IEEE80211_DEV_REGISTERED,
 428                 IEEE80211_DEV_UNREGISTERED,
 429         } reg_state;
 430
 431         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 432          * added to skb_queue will be processed, but frames in
 433          * skb_queue_unreliable may be dropped if the total length of these
 434          * queues increases over the limit. */
 435 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 436         struct tasklet_struct tasklet;
 437         struct sk_buff_head skb_queue;
 438         struct sk_buff_head skb_queue_unreliable;
 439
 440         /* Station data structures */
 441         rwlock_t sta_lock; /* protects STA data structures */
 442         int num_sta; /* number of stations in sta_list */
 443         struct list_head sta_list;
 444         struct sta_info *sta_hash[STA_HASH_SIZE];
 445         struct timer_list sta_cleanup;
 446
 447         unsigned long state[NUM_TX_DATA_QUEUES_AMPDU];
 448         struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES_AMPDU];
 449         struct tasklet_struct tx_pending_tasklet;
 450
 451         /* number of interfaces with corresponding IFF_ flags */
 452         atomic_t iff_allmultis, iff_promiscs;
 453
 454         struct rate_control_ref *rate_ctrl;
 455
 456         int rts_threshold;
 457         int fragmentation_threshold;
 458         int short_retry_limit; /* dot11ShortRetryLimit */
 459         int long_retry_limit; /* dot11LongRetryLimit */
 460
 461         struct crypto_blkcipher *wep_tx_tfm;
 462         struct crypto_blkcipher *wep_rx_tfm;
 463         u32 wep_iv;
 464
 465         int bridge_packets; /* bridge packets between associated stations and
 466                              * deliver multicast frames both back to wireless
 467                              * media and to the local net stack */
 468
 469         ieee80211_rx_handler *rx_handlers;
 470         ieee80211_tx_handler *tx_handlers;
 471
 472         struct list_head interfaces;
 473
 474         bool sta_sw_scanning;
 475         bool sta_hw_scanning;
 476         int scan_channel_idx;
 477         enum ieee80211_band scan_band;
 478
 479         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 480         unsigned long last_scan_completed;
 481         struct delayed_work scan_work;
 482         struct net_device *scan_dev;
 483         struct ieee80211_channel *oper_channel, *scan_channel;
 484         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 485         size_t scan_ssid_len;
 486         struct list_head sta_bss_list;
 487         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 488         spinlock_t sta_bss_lock;
 489
 490         /* SNMP counters */
 491         /* dot11CountersTable */
 492         u32 dot11TransmittedFragmentCount;
 493         u32 dot11MulticastTransmittedFrameCount;
 494         u32 dot11FailedCount;
 495         u32 dot11RetryCount;
 496         u32 dot11MultipleRetryCount;
 497         u32 dot11FrameDuplicateCount;
 498         u32 dot11ReceivedFragmentCount;
 499         u32 dot11MulticastReceivedFrameCount;
 500         u32 dot11TransmittedFrameCount;
 501         u32 dot11WEPUndecryptableCount;
 502
 503 #ifdef CONFIG_MAC80211_LEDS
 504         int tx_led_counter, rx_led_counter;
 505         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 506         char tx_led_name[32], rx_led_name[32],
 507              assoc_led_name[32], radio_led_name[32];
 508 #endif
 509
 510         u32 channel_use;
 511         u32 channel_use_raw;
 512
 513 #ifdef CONFIG_MAC80211_DEBUGFS
 514         struct work_struct sta_debugfs_add;
 515 #endif
 516
 517 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 518         /* TX/RX handler statistics */
 519         unsigned int tx_handlers_drop;
 520         unsigned int tx_handlers_queued;
 521         unsigned int tx_handlers_drop_unencrypted;
 522         unsigned int tx_handlers_drop_fragment;
 523         unsigned int tx_handlers_drop_wep;
 524         unsigned int tx_handlers_drop_not_assoc;
 525         unsigned int tx_handlers_drop_unauth_port;
 526         unsigned int rx_handlers_drop;
 527         unsigned int rx_handlers_queued;
 528         unsigned int rx_handlers_drop_nullfunc;
 529         unsigned int rx_handlers_drop_defrag;
 530         unsigned int rx_handlers_drop_short;
 531         unsigned int rx_handlers_drop_passive_scan;
 532         unsigned int tx_expand_skb_head;
 533         unsigned int tx_expand_skb_head_cloned;
 534         unsigned int rx_expand_skb_head;
 535         unsigned int rx_expand_skb_head2;
 536         unsigned int rx_handlers_fragments;
 537         unsigned int tx_status_drop;
 538         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 539         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 540 #define I802_DEBUG_INC(c) (c)++
 541 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 542 #define I802_DEBUG_INC(c) do { } while (0)
 543 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 544
 545
 546         int total_ps_buffered; /* total number of all buffered unicast and
 547                                 * multicast packets for power saving stations
 548                                 */
 549         int wifi_wme_noack_test;
 550         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 551
 552 #ifdef CONFIG_MAC80211_DEBUGFS
 553         struct local_debugfsdentries {
 554                 struct dentry *frequency;
 555                 struct dentry *antenna_sel_tx;
 556                 struct dentry *antenna_sel_rx;
 557                 struct dentry *bridge_packets;
 558                 struct dentry *rts_threshold;
 559                 struct dentry *fragmentation_threshold;
 560                 struct dentry *short_retry_limit;
 561                 struct dentry *long_retry_limit;
 562                 struct dentry *total_ps_buffered;
 563                 struct dentry *wep_iv;
 564                 struct dentry *statistics;
 565                 struct local_debugfsdentries_statsdentries {
 566                         struct dentry *transmitted_fragment_count;
 567                         struct dentry *multicast_transmitted_frame_count;
 568                         struct dentry *failed_count;
 569                         struct dentry *retry_count;
 570                         struct dentry *multiple_retry_count;
 571                         struct dentry *frame_duplicate_count;
 572                         struct dentry *received_fragment_count;
 573                         struct dentry *multicast_received_frame_count;
 574                         struct dentry *transmitted_frame_count;
 575                         struct dentry *wep_undecryptable_count;
 576                         struct dentry *num_scans;
 577 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 578                         struct dentry *tx_handlers_drop;
 579                         struct dentry *tx_handlers_queued;
 580                         struct dentry *tx_handlers_drop_unencrypted;
 581                         struct dentry *tx_handlers_drop_fragment;
 582                         struct dentry *tx_handlers_drop_wep;
 583                         struct dentry *tx_handlers_drop_not_assoc;
 584                         struct dentry *tx_handlers_drop_unauth_port;
 585                         struct dentry *rx_handlers_drop;
 586                         struct dentry *rx_handlers_queued;
 587                         struct dentry *rx_handlers_drop_nullfunc;
 588                         struct dentry *rx_handlers_drop_defrag;
 589                         struct dentry *rx_handlers_drop_short;
 590                         struct dentry *rx_handlers_drop_passive_scan;
 591                         struct dentry *tx_expand_skb_head;
 592                         struct dentry *tx_expand_skb_head_cloned;
 593                         struct dentry *rx_expand_skb_head;
 594                         struct dentry *rx_expand_skb_head2;
 595                         struct dentry *rx_handlers_fragments;
 596                         struct dentry *tx_status_drop;
 597                         struct dentry *wme_tx_queue;
 598                         struct dentry *wme_rx_queue;
 599 #endif
 600                         struct dentry *dot11ACKFailureCount;
 601                         struct dentry *dot11RTSFailureCount;
 602                         struct dentry *dot11FCSErrorCount;
 603                         struct dentry *dot11RTSSuccessCount;
 604                 } stats;
 605                 struct dentry *stations;
 606                 struct dentry *keys;
 607         } debugfs;
 608 #endif
 609 };
 610
 611 /* this struct represents 802.11n's RA/TID combination */
 612 struct ieee80211_ra_tid {
 613         u8 ra[ETH_ALEN];
 614         u16 tid;
 615 };
 616
 617 static inline struct ieee80211_local *hw_to_local(
 618         struct ieee80211_hw *hw)
 619 {
 620         return container_of(hw, struct ieee80211_local, hw);
 621 }
 622
 623 static inline struct ieee80211_hw *local_to_hw(
 624         struct ieee80211_local *local)
 625 {
 626         return &local->hw;
 627 }
 628
 629 enum ieee80211_link_state_t {
 630         IEEE80211_LINK_STATE_XOFF = 0,
 631         IEEE80211_LINK_STATE_PENDING,
 632 };
 633
 634 struct sta_attribute {
 635         struct attribute attr;
 636         ssize_t (*show)(const struct sta_info *, char *buf);
 637         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 638 };
 639
 640 static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid)
 641 {
 642         /*
 643          * This format has been mandated by the IEEE specifications,
 644          * so this line may not be changed to use the __set_bit() format.
 645          */
 646         bss->tim[aid / 8] |= (1 << (aid % 8));
 647 }
 648
 649 static inline void bss_tim_set(struct ieee80211_local *local,
 650                                struct ieee80211_if_ap *bss, u16 aid)
 651 {
 652         read_lock_bh(&local->sta_lock);
 653         __bss_tim_set(bss, aid);
 654         read_unlock_bh(&local->sta_lock);
 655 }
 656
 657 static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid)
 658 {
 659         /*
 660          * This format has been mandated by the IEEE specifications,
 661          * so this line may not be changed to use the __clear_bit() format.
 662          */
 663         bss->tim[aid / 8] &= ~(1 << (aid % 8));
 664 }
 665
 666 static inline void bss_tim_clear(struct ieee80211_local *local,
 667                                  struct ieee80211_if_ap *bss, u16 aid)
 668 {
 669         read_lock_bh(&local->sta_lock);
 670         __bss_tim_clear(bss, aid);
 671         read_unlock_bh(&local->sta_lock);
 672 }
 673
 674 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 675 {
 676         return compare_ether_addr(raddr, addr) == 0 ||
 677                is_broadcast_ether_addr(raddr);
 678 }
 679
 680
 681 /* ieee80211.c */
 682 int ieee80211_hw_config(struct ieee80211_local *local);
 683 int ieee80211_if_config(struct net_device *dev);
 684 int ieee80211_if_config_beacon(struct net_device *dev);
 685 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
 686 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
 687 void ieee80211_if_setup(struct net_device *dev);
 688 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 689                            struct ieee80211_ht_info *req_ht_cap,
 690                            struct ieee80211_ht_bss_info *req_bss_cap);
 691
 692 /* ieee80211_ioctl.c */
 693 extern const struct iw_handler_def ieee80211_iw_handler_def;
 694
 695
 696 /* Least common multiple of the used rates (in 100 kbps). This is used to
 697  * calculate rate_inv values for each rate so that only integers are needed. */
 698 #define CHAN_UTIL_RATE_LCM 95040
 699 /* 1 usec is 1/8 * (95040/10) = 1188 */
 700 #define CHAN_UTIL_PER_USEC 1188
 701 /* Amount of bits to shift the result right to scale the total utilization
 702  * to values that will not wrap around 32-bit integers. */
 703 #define CHAN_UTIL_SHIFT 9
 704 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 705  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 706  * raw value with about 23 should give utilization in 10th of a percentage
 707  * (1/1000). However, utilization is only estimated and not all intervals
 708  * between frames etc. are calculated. 18 seems to give numbers that are closer
 709  * to the real maximum. */
 710 #define CHAN_UTIL_PER_10MS 18
 711 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 712 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 713
 714
 715 /* ieee80211_ioctl.c */
 716 int ieee80211_set_compression(struct ieee80211_local *local,
 717                               struct net_device *dev, struct sta_info *sta);
 718 int ieee80211_set_freq(struct ieee80211_local *local, int freq);
 719 /* ieee80211_sta.c */
 720 void ieee80211_sta_timer(unsigned long data);
 721 void ieee80211_sta_work(struct work_struct *work);
 722 void ieee80211_sta_scan_work(struct work_struct *work);
 723 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 724                            struct ieee80211_rx_status *rx_status);
 725 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 726 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 727 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 728 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 729 void ieee80211_sta_req_auth(struct net_device *dev,
 730                             struct ieee80211_if_sta *ifsta);
 731 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 732 ieee80211_txrx_result ieee80211_sta_rx_scan(struct net_device *dev,
 733                                             struct sk_buff *skb,
 734                            struct ieee80211_rx_status *rx_status);
 735 void ieee80211_rx_bss_list_init(struct net_device *dev);
 736 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 737 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 738 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 739                                          struct sk_buff *skb, u8 *bssid,
 740                                          u8 *addr);
 741 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 742 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 743 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 744                                       u32 changed);
 745 void ieee80211_reset_erp_info(struct net_device *dev);
 746 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 747                                    struct ieee80211_ht_info *ht_info);
 748 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 749                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 750                         struct ieee80211_ht_bss_info *bss_info);
 751 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
 752                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 753                                   u16 agg_size, u16 timeout);
 754 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
 755                                 u16 initiator, u16 reason_code);
 756 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
 757                                 u16 tid, u16 initiator, u16 reason);
 758 void sta_rx_agg_session_timer_expired(unsigned long data);
 759 void sta_addba_resp_timer_expired(unsigned long data);
 760 /* ieee80211_iface.c */
 761 int ieee80211_if_add(struct net_device *dev, const char *name,
 762                      struct net_device **new_dev, int type);
 763 void ieee80211_if_set_type(struct net_device *dev, int type);
 764 void ieee80211_if_reinit(struct net_device *dev);
 765 void __ieee80211_if_del(struct ieee80211_local *local,
 766                         struct ieee80211_sub_if_data *sdata);
 767 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 768 void ieee80211_if_free(struct net_device *dev);
 769 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 770
 771 /* rx handling */
 772 extern ieee80211_rx_handler ieee80211_rx_handlers[];
 773
 774 /* tx handling */
 775 extern ieee80211_tx_handler ieee80211_tx_handlers[];
 776 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 777 void ieee80211_tx_pending(unsigned long data);
 778 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 779 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 780 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 781
 782 /* utility functions/constants */
 783 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 784 extern const unsigned char rfc1042_header[6];
 785 extern const unsigned char bridge_tunnel_header[6];
 786 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 787                         enum ieee80211_if_types type);
 788 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 789                              int rate, int erp, int short_preamble);
 790 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 791                                      struct ieee80211_hdr *hdr);
 792
 793 #endif /* IEEE80211_I_H */