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  * Copyright 2007-2008  Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef IEEE80211_I_H
  13 #define IEEE80211_I_H
  14
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/etherdevice.h>
  26 #include <net/wireless.h>
  27 #include <net/iw_handler.h>
  28 #include <net/mac80211.h>
  29 #include "key.h"
  30 #include "sta_info.h"
  31
  32 /* ieee80211.o internal definitions, etc. These are not included into
  33  * low-level drivers. */
  34
  35 struct ieee80211_local;
  36
  37 /* Maximum number of broadcast/multicast frames to buffer when some of the
  38  * associated stations are using power saving. */
  39 #define AP_MAX_BC_BUFFER 128
  40
  41 /* Maximum number of frames buffered to all STAs, including multicast frames.
  42  * Note: increasing this limit increases the potential memory requirement. Each
  43  * frame can be up to about 2 kB long. */
  44 #define TOTAL_MAX_TX_BUFFER 512
  45
  46 /* Required encryption head and tailroom */
  47 #define IEEE80211_ENCRYPT_HEADROOM 8
  48 #define IEEE80211_ENCRYPT_TAILROOM 12
  49
  50 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  51  * reception of at least three fragmented frames. This limit can be increased
  52  * by changing this define, at the cost of slower frame reassembly and
  53  * increased memory use (about 2 kB of RAM per entry). */
  54 #define IEEE80211_FRAGMENT_MAX 4
  55
  56 struct ieee80211_fragment_entry {
  57         unsigned long first_frag_time;
  58         unsigned int seq;
  59         unsigned int rx_queue;
  60         unsigned int last_frag;
  61         unsigned int extra_len;
  62         struct sk_buff_head skb_list;
  63         int ccmp; /* Whether fragments were encrypted with CCMP */
  64         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  65 };
  66
  67
  68 struct ieee80211_sta_bss {
  69         struct list_head list;
  70         struct ieee80211_sta_bss *hnext;
  71         size_t ssid_len;
  72
  73         atomic_t users;
  74
  75         u8 bssid[ETH_ALEN];
  76         u8 ssid[IEEE80211_MAX_SSID_LEN];
  77         u8 dtim_period;
  78         u16 capability; /* host byte order */
  79         enum ieee80211_band band;
  80         int freq;
  81         int signal, noise, qual;
  82         u8 *wpa_ie;
  83         size_t wpa_ie_len;
  84         u8 *rsn_ie;
  85         size_t rsn_ie_len;
  86         u8 *wmm_ie;
  87         size_t wmm_ie_len;
  88         u8 *ht_ie;
  89         size_t ht_ie_len;
  90         u8 *ht_add_ie;
  91         size_t ht_add_ie_len;
  92 #ifdef CONFIG_MAC80211_MESH
  93         u8 *mesh_id;
  94         size_t mesh_id_len;
  95         u8 *mesh_cfg;
  96 #endif
  97 #define IEEE80211_MAX_SUPP_RATES 32
  98         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  99         size_t supp_rates_len;
 100         u64 timestamp;
 101         int beacon_int;
 102
 103         bool probe_resp;
 104         unsigned long last_update;
 105
 106         /* during assocation, we save an ERP value from a probe response so
 107          * that we can feed ERP info to the driver when handling the
 108          * association completes. these fields probably won't be up-to-date
 109          * otherwise, you probably don't want to use them. */
 110         int has_erp_value;
 111         u8 erp_value;
 112 };
 113
 114 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 115 {
 116 #ifdef CONFIG_MAC80211_MESH
 117         return bss->mesh_cfg;
 118 #endif
 119         return NULL;
 120 }
 121
 122 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 123 {
 124 #ifdef CONFIG_MAC80211_MESH
 125         return bss->mesh_id;
 126 #endif
 127         return NULL;
 128 }
 129
 130 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 131 {
 132 #ifdef CONFIG_MAC80211_MESH
 133         return bss->mesh_id_len;
 134 #endif
 135         return 0;
 136 }
 137
 138
 139 typedef unsigned __bitwise__ ieee80211_tx_result;
 140 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 141 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 142 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 143
 144 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 145 #define IEEE80211_TX_UNICAST            BIT(1)
 146 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 147 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 148
 149 struct ieee80211_tx_data {
 150         struct sk_buff *skb;
 151         struct net_device *dev;
 152         struct ieee80211_local *local;
 153         struct ieee80211_sub_if_data *sdata;
 154         struct sta_info *sta;
 155         struct ieee80211_key *key;
 156
 157         struct ieee80211_channel *channel;
 158         s8 rate_idx;
 159         /* use this rate (if set) for last fragment; rate can
 160          * be set to lower rate for the first fragments, e.g.,
 161          * when using CTS protection with IEEE 802.11g. */
 162         s8 last_frag_rate_idx;
 163
 164         /* Extra fragments (in addition to the first fragment
 165          * in skb) */
 166         struct sk_buff **extra_frag;
 167         int num_extra_frag;
 168
 169         u16 ethertype;
 170         unsigned int flags;
 171 };
 172
 173
 174 typedef unsigned __bitwise__ ieee80211_rx_result;
 175 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 176 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 177 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 178 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 179
 180 #define IEEE80211_RX_IN_SCAN            BIT(0)
 181 /* frame is destined to interface currently processed (incl. multicast frames) */
 182 #define IEEE80211_RX_RA_MATCH           BIT(1)
 183 #define IEEE80211_RX_AMSDU              BIT(2)
 184 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 185 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 186
 187 struct ieee80211_rx_data {
 188         struct sk_buff *skb;
 189         struct net_device *dev;
 190         struct ieee80211_local *local;
 191         struct ieee80211_sub_if_data *sdata;
 192         struct sta_info *sta;
 193         struct ieee80211_key *key;
 194         struct ieee80211_rx_status *status;
 195         struct ieee80211_rate *rate;
 196
 197         u16 ethertype;
 198         unsigned int flags;
 199         int sent_ps_buffered;
 200         int queue;
 201         u32 tkip_iv32;
 202         u16 tkip_iv16;
 203 };
 204
 205 struct ieee80211_tx_stored_packet {
 206         struct sk_buff *skb;
 207         struct sk_buff **extra_frag;
 208         s8 last_frag_rate_idx;
 209         int num_extra_frag;
 210         bool last_frag_rate_ctrl_probe;
 211 };
 212
 213 struct beacon_data {
 214         u8 *head, *tail;
 215         int head_len, tail_len;
 216         int dtim_period;
 217 };
 218
 219 struct ieee80211_if_ap {
 220         struct beacon_data *beacon;
 221
 222         struct list_head vlans;
 223
 224         u8 ssid[IEEE80211_MAX_SSID_LEN];
 225         size_t ssid_len;
 226
 227         /* yes, this looks ugly, but guarantees that we can later use
 228          * bitmap_empty :)
 229          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 230         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 231         struct sk_buff_head ps_bc_buf;
 232         atomic_t num_sta_ps; /* number of stations in PS mode */
 233         int dtim_count;
 234         int num_beacons; /* number of TXed beacon frames for this BSS */
 235 };
 236
 237 struct ieee80211_if_wds {
 238         struct sta_info *sta;
 239         u8 remote_addr[ETH_ALEN];
 240 };
 241
 242 struct ieee80211_if_vlan {
 243         struct list_head list;
 244 };
 245
 246 struct mesh_stats {
 247         __u32 fwded_frames;             /* Mesh forwarded frames */
 248         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 249         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 250         atomic_t estab_plinks;
 251 };
 252
 253 #define PREQ_Q_F_START          0x1
 254 #define PREQ_Q_F_REFRESH        0x2
 255 struct mesh_preq_queue {
 256         struct list_head list;
 257         u8 dst[ETH_ALEN];
 258         u8 flags;
 259 };
 260
 261 struct mesh_config {
 262         /* Timeouts in ms */
 263         /* Mesh plink management parameters */
 264         u16 dot11MeshRetryTimeout;
 265         u16 dot11MeshConfirmTimeout;
 266         u16 dot11MeshHoldingTimeout;
 267         u16 dot11MeshMaxPeerLinks;
 268         u8  dot11MeshMaxRetries;
 269         u8  dot11MeshTTL;
 270         bool auto_open_plinks;
 271         /* HWMP parameters */
 272         u8  dot11MeshHWMPmaxPREQretries;
 273         u32 path_refresh_time;
 274         u16 min_discovery_timeout;
 275         u32 dot11MeshHWMPactivePathTimeout;
 276         u16 dot11MeshHWMPpreqMinInterval;
 277         u16 dot11MeshHWMPnetDiameterTraversalTime;
 278 };
 279
 280
 281 /* flags used in struct ieee80211_if_sta.flags */
 282 #define IEEE80211_STA_SSID_SET          BIT(0)
 283 #define IEEE80211_STA_BSSID_SET         BIT(1)
 284 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 285 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 286 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 287 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 288 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 289 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 290 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 291 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 292 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 293 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 294 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 295 /* flags for  MLME request*/
 296 #define IEEE80211_STA_REQ_SCAN 0
 297 #define IEEE80211_STA_REQ_AUTH 1
 298 #define IEEE80211_STA_REQ_RUN  2
 299
 300 /* flags used for setting mlme state */
 301 enum ieee80211_sta_mlme_state {
 302         IEEE80211_STA_MLME_DISABLED,
 303         IEEE80211_STA_MLME_AUTHENTICATE,
 304         IEEE80211_STA_MLME_ASSOCIATE,
 305         IEEE80211_STA_MLME_ASSOCIATED,
 306         IEEE80211_STA_MLME_IBSS_SEARCH,
 307         IEEE80211_STA_MLME_IBSS_JOINED,
 308         IEEE80211_STA_MLME_MESH_UP
 309 };
 310
 311 /* bitfield of allowed auth algs */
 312 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 313 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 314 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 315
 316 struct ieee80211_if_sta {
 317         struct timer_list timer;
 318         struct work_struct work;
 319         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 320         u8 ssid[IEEE80211_MAX_SSID_LEN];
 321         enum ieee80211_sta_mlme_state state;
 322         size_t ssid_len;
 323         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 324         size_t scan_ssid_len;
 325 #ifdef CONFIG_MAC80211_MESH
 326         struct timer_list mesh_path_timer;
 327         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 328         size_t mesh_id_len;
 329         /* Active Path Selection Protocol Identifier */
 330         u8 mesh_pp_id[4];
 331         /* Active Path Selection Metric Identifier */
 332         u8 mesh_pm_id[4];
 333         /* Congestion Control Mode Identifier */
 334         u8 mesh_cc_id[4];
 335         /* Local mesh Destination Sequence Number */
 336         u32 dsn;
 337         /* Last used PREQ ID */
 338         u32 preq_id;
 339         atomic_t mpaths;
 340         /* Timestamp of last DSN update */
 341         unsigned long last_dsn_update;
 342         /* Timestamp of last DSN sent */
 343         unsigned long last_preq;
 344         struct mesh_rmc *rmc;
 345         spinlock_t mesh_preq_queue_lock;
 346         struct mesh_preq_queue preq_queue;
 347         int preq_queue_len;
 348         struct mesh_stats mshstats;
 349         struct mesh_config mshcfg;
 350         u32 mesh_seqnum;
 351         bool accepting_plinks;
 352 #endif
 353         u16 aid;
 354         u16 ap_capab, capab;
 355         u8 *extra_ie; /* to be added to the end of AssocReq */
 356         size_t extra_ie_len;
 357
 358         /* The last AssocReq/Resp IEs */
 359         u8 *assocreq_ies, *assocresp_ies;
 360         size_t assocreq_ies_len, assocresp_ies_len;
 361
 362         struct sk_buff_head skb_queue;
 363
 364         int auth_tries, assoc_tries;
 365
 366         unsigned long request;
 367
 368         unsigned long last_probe;
 369
 370         unsigned int flags;
 371
 372         unsigned int auth_algs; /* bitfield of allowed auth algs */
 373         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 374         int auth_transaction;
 375
 376         unsigned long ibss_join_req;
 377         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 378         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 379
 380         int wmm_last_param_set;
 381         int num_beacons; /* number of TXed beacon frames by this STA */
 382 };
 383
 384 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 385                                                 u8 mesh_id_len, u8 *mesh_id)
 386 {
 387 #ifdef CONFIG_MAC80211_MESH
 388         ifsta->mesh_id_len = mesh_id_len;
 389         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 390 #endif
 391 }
 392
 393 #ifdef CONFIG_MAC80211_MESH
 394 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 395         do { (sta)->mshstats.name++; } while (0)
 396 #else
 397 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 398         do { } while (0)
 399 #endif
 400
 401 /* flags used in struct ieee80211_sub_if_data.flags */
 402 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 403 #define IEEE80211_SDATA_PROMISC         BIT(1)
 404 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 405 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 406 struct ieee80211_sub_if_data {
 407         struct list_head list;
 408
 409         struct wireless_dev wdev;
 410
 411         /* keys */
 412         struct list_head key_list;
 413
 414         struct net_device *dev;
 415         struct ieee80211_local *local;
 416
 417         unsigned int flags;
 418
 419         int drop_unencrypted;
 420
 421         /*
 422          * basic rates of this AP or the AP we're associated to
 423          */
 424         u64 basic_rates;
 425
 426         /* Fragment table for host-based reassembly */
 427         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 428         unsigned int fragment_next;
 429
 430 #define NUM_DEFAULT_KEYS 4
 431         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 432         struct ieee80211_key *default_key;
 433
 434         /* BSS configuration for this interface. */
 435         struct ieee80211_bss_conf bss_conf;
 436
 437         /*
 438          * AP this belongs to: self in AP mode and
 439          * corresponding AP in VLAN mode, NULL for
 440          * all others (might be needed later in IBSS)
 441          */
 442         struct ieee80211_if_ap *bss;
 443
 444         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 445         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 446
 447         union {
 448                 struct ieee80211_if_ap ap;
 449                 struct ieee80211_if_wds wds;
 450                 struct ieee80211_if_vlan vlan;
 451                 struct ieee80211_if_sta sta;
 452                 u32 mntr_flags;
 453         } u;
 454
 455 #ifdef CONFIG_MAC80211_DEBUGFS
 456         struct dentry *debugfsdir;
 457         union {
 458                 struct {
 459                         struct dentry *drop_unencrypted;
 460                         struct dentry *state;
 461                         struct dentry *bssid;
 462                         struct dentry *prev_bssid;
 463                         struct dentry *ssid_len;
 464                         struct dentry *aid;
 465                         struct dentry *ap_capab;
 466                         struct dentry *capab;
 467                         struct dentry *extra_ie_len;
 468                         struct dentry *auth_tries;
 469                         struct dentry *assoc_tries;
 470                         struct dentry *auth_algs;
 471                         struct dentry *auth_alg;
 472                         struct dentry *auth_transaction;
 473                         struct dentry *flags;
 474                         struct dentry *num_beacons_sta;
 475                 } sta;
 476                 struct {
 477                         struct dentry *drop_unencrypted;
 478                         struct dentry *num_sta_ps;
 479                         struct dentry *dtim_count;
 480                         struct dentry *num_beacons;
 481                         struct dentry *force_unicast_rateidx;
 482                         struct dentry *max_ratectrl_rateidx;
 483                         struct dentry *num_buffered_multicast;
 484                 } ap;
 485                 struct {
 486                         struct dentry *drop_unencrypted;
 487                         struct dentry *peer;
 488                 } wds;
 489                 struct {
 490                         struct dentry *drop_unencrypted;
 491                 } vlan;
 492                 struct {
 493                         struct dentry *mode;
 494                 } monitor;
 495                 struct dentry *default_key;
 496         } debugfs;
 497
 498 #ifdef CONFIG_MAC80211_MESH
 499         struct dentry *mesh_stats_dir;
 500         struct {
 501                 struct dentry *fwded_frames;
 502                 struct dentry *dropped_frames_ttl;
 503                 struct dentry *dropped_frames_no_route;
 504                 struct dentry *estab_plinks;
 505                 struct timer_list mesh_path_timer;
 506         } mesh_stats;
 507
 508         struct dentry *mesh_config_dir;
 509         struct {
 510                 struct dentry *dot11MeshRetryTimeout;
 511                 struct dentry *dot11MeshConfirmTimeout;
 512                 struct dentry *dot11MeshHoldingTimeout;
 513                 struct dentry *dot11MeshMaxRetries;
 514                 struct dentry *dot11MeshTTL;
 515                 struct dentry *auto_open_plinks;
 516                 struct dentry *dot11MeshMaxPeerLinks;
 517                 struct dentry *dot11MeshHWMPactivePathTimeout;
 518                 struct dentry *dot11MeshHWMPpreqMinInterval;
 519                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 520                 struct dentry *dot11MeshHWMPmaxPREQretries;
 521                 struct dentry *path_refresh_time;
 522                 struct dentry *min_discovery_timeout;
 523         } mesh_config;
 524 #endif
 525
 526 #endif
 527         /* must be last, dynamically sized area in this! */
 528         struct ieee80211_vif vif;
 529 };
 530
 531 static inline
 532 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 533 {
 534         return container_of(p, struct ieee80211_sub_if_data, vif);
 535 }
 536
 537 enum {
 538         IEEE80211_RX_MSG        = 1,
 539         IEEE80211_TX_STATUS_MSG = 2,
 540         IEEE80211_DELBA_MSG     = 3,
 541         IEEE80211_ADDBA_MSG     = 4,
 542 };
 543
 544 /* maximum number of hardware queues we support. */
 545 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 546
 547 struct ieee80211_local {
 548         /* embed the driver visible part.
 549          * don't cast (use the static inlines below), but we keep
 550          * it first anyway so they become a no-op */
 551         struct ieee80211_hw hw;
 552
 553         const struct ieee80211_ops *ops;
 554
 555         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 556
 557         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 558         int open_count;
 559         int monitors, cooked_mntrs;
 560         /* number of interfaces with corresponding FIF_ flags */
 561         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 562         unsigned int filter_flags; /* FIF_* */
 563         struct iw_statistics wstats;
 564         u8 wstats_flags;
 565         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 566         int tx_headroom; /* required headroom for hardware/radiotap */
 567
 568         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 569          * added to skb_queue will be processed, but frames in
 570          * skb_queue_unreliable may be dropped if the total length of these
 571          * queues increases over the limit. */
 572 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 573         struct tasklet_struct tasklet;
 574         struct sk_buff_head skb_queue;
 575         struct sk_buff_head skb_queue_unreliable;
 576
 577         /* Station data */
 578         /*
 579          * The lock only protects the list, hash, timer and counter
 580          * against manipulation, reads are done in RCU. Additionally,
 581          * the lock protects each BSS's TIM bitmap.
 582          */
 583         spinlock_t sta_lock;
 584         unsigned long num_sta;
 585         struct list_head sta_list;
 586         struct list_head sta_flush_list;
 587         struct work_struct sta_flush_work;
 588         struct sta_info *sta_hash[STA_HASH_SIZE];
 589         struct timer_list sta_cleanup;
 590
 591         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 592         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 593         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 594         struct tasklet_struct tx_pending_tasklet;
 595
 596         /* number of interfaces with corresponding IFF_ flags */
 597         atomic_t iff_allmultis, iff_promiscs;
 598
 599         struct rate_control_ref *rate_ctrl;
 600
 601         int rts_threshold;
 602         int fragmentation_threshold;
 603         int short_retry_limit; /* dot11ShortRetryLimit */
 604         int long_retry_limit; /* dot11LongRetryLimit */
 605
 606         struct crypto_blkcipher *wep_tx_tfm;
 607         struct crypto_blkcipher *wep_rx_tfm;
 608         u32 wep_iv;
 609
 610         int bridge_packets; /* bridge packets between associated stations and
 611                              * deliver multicast frames both back to wireless
 612                              * media and to the local net stack */
 613
 614         struct list_head interfaces;
 615
 616         /*
 617          * Key lock, protects sdata's key_list and sta_info's
 618          * key pointers (write access, they're RCU.)
 619          */
 620         spinlock_t key_lock;
 621
 622
 623         bool sta_sw_scanning;
 624         bool sta_hw_scanning;
 625         int scan_channel_idx;
 626         enum ieee80211_band scan_band;
 627
 628         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 629         unsigned long last_scan_completed;
 630         struct delayed_work scan_work;
 631         struct net_device *scan_dev;
 632         struct ieee80211_channel *oper_channel, *scan_channel;
 633         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 634         size_t scan_ssid_len;
 635         struct list_head sta_bss_list;
 636         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 637         spinlock_t sta_bss_lock;
 638
 639         /* SNMP counters */
 640         /* dot11CountersTable */
 641         u32 dot11TransmittedFragmentCount;
 642         u32 dot11MulticastTransmittedFrameCount;
 643         u32 dot11FailedCount;
 644         u32 dot11RetryCount;
 645         u32 dot11MultipleRetryCount;
 646         u32 dot11FrameDuplicateCount;
 647         u32 dot11ReceivedFragmentCount;
 648         u32 dot11MulticastReceivedFrameCount;
 649         u32 dot11TransmittedFrameCount;
 650         u32 dot11WEPUndecryptableCount;
 651
 652 #ifdef CONFIG_MAC80211_LEDS
 653         int tx_led_counter, rx_led_counter;
 654         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 655         char tx_led_name[32], rx_led_name[32],
 656              assoc_led_name[32], radio_led_name[32];
 657 #endif
 658
 659 #ifdef CONFIG_MAC80211_DEBUGFS
 660         struct work_struct sta_debugfs_add;
 661 #endif
 662
 663 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 664         /* TX/RX handler statistics */
 665         unsigned int tx_handlers_drop;
 666         unsigned int tx_handlers_queued;
 667         unsigned int tx_handlers_drop_unencrypted;
 668         unsigned int tx_handlers_drop_fragment;
 669         unsigned int tx_handlers_drop_wep;
 670         unsigned int tx_handlers_drop_not_assoc;
 671         unsigned int tx_handlers_drop_unauth_port;
 672         unsigned int rx_handlers_drop;
 673         unsigned int rx_handlers_queued;
 674         unsigned int rx_handlers_drop_nullfunc;
 675         unsigned int rx_handlers_drop_defrag;
 676         unsigned int rx_handlers_drop_short;
 677         unsigned int rx_handlers_drop_passive_scan;
 678         unsigned int tx_expand_skb_head;
 679         unsigned int tx_expand_skb_head_cloned;
 680         unsigned int rx_expand_skb_head;
 681         unsigned int rx_expand_skb_head2;
 682         unsigned int rx_handlers_fragments;
 683         unsigned int tx_status_drop;
 684 #define I802_DEBUG_INC(c) (c)++
 685 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 686 #define I802_DEBUG_INC(c) do { } while (0)
 687 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 688
 689
 690         int total_ps_buffered; /* total number of all buffered unicast and
 691                                 * multicast packets for power saving stations
 692                                 */
 693         int wifi_wme_noack_test;
 694         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 695
 696 #ifdef CONFIG_MAC80211_DEBUGFS
 697         struct local_debugfsdentries {
 698                 struct dentry *frequency;
 699                 struct dentry *antenna_sel_tx;
 700                 struct dentry *antenna_sel_rx;
 701                 struct dentry *bridge_packets;
 702                 struct dentry *rts_threshold;
 703                 struct dentry *fragmentation_threshold;
 704                 struct dentry *short_retry_limit;
 705                 struct dentry *long_retry_limit;
 706                 struct dentry *total_ps_buffered;
 707                 struct dentry *wep_iv;
 708                 struct dentry *statistics;
 709                 struct local_debugfsdentries_statsdentries {
 710                         struct dentry *transmitted_fragment_count;
 711                         struct dentry *multicast_transmitted_frame_count;
 712                         struct dentry *failed_count;
 713                         struct dentry *retry_count;
 714                         struct dentry *multiple_retry_count;
 715                         struct dentry *frame_duplicate_count;
 716                         struct dentry *received_fragment_count;
 717                         struct dentry *multicast_received_frame_count;
 718                         struct dentry *transmitted_frame_count;
 719                         struct dentry *wep_undecryptable_count;
 720                         struct dentry *num_scans;
 721 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 722                         struct dentry *tx_handlers_drop;
 723                         struct dentry *tx_handlers_queued;
 724                         struct dentry *tx_handlers_drop_unencrypted;
 725                         struct dentry *tx_handlers_drop_fragment;
 726                         struct dentry *tx_handlers_drop_wep;
 727                         struct dentry *tx_handlers_drop_not_assoc;
 728                         struct dentry *tx_handlers_drop_unauth_port;
 729                         struct dentry *rx_handlers_drop;
 730                         struct dentry *rx_handlers_queued;
 731                         struct dentry *rx_handlers_drop_nullfunc;
 732                         struct dentry *rx_handlers_drop_defrag;
 733                         struct dentry *rx_handlers_drop_short;
 734                         struct dentry *rx_handlers_drop_passive_scan;
 735                         struct dentry *tx_expand_skb_head;
 736                         struct dentry *tx_expand_skb_head_cloned;
 737                         struct dentry *rx_expand_skb_head;
 738                         struct dentry *rx_expand_skb_head2;
 739                         struct dentry *rx_handlers_fragments;
 740                         struct dentry *tx_status_drop;
 741 #endif
 742                         struct dentry *dot11ACKFailureCount;
 743                         struct dentry *dot11RTSFailureCount;
 744                         struct dentry *dot11FCSErrorCount;
 745                         struct dentry *dot11RTSSuccessCount;
 746                 } stats;
 747                 struct dentry *stations;
 748                 struct dentry *keys;
 749         } debugfs;
 750 #endif
 751 };
 752
 753 static inline struct ieee80211_sub_if_data *
 754 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 755 {
 756         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 757
 758         BUG_ON(!local || local->mdev == dev);
 759
 760         return netdev_priv(dev);
 761 }
 762
 763 /* this struct represents 802.11n's RA/TID combination */
 764 struct ieee80211_ra_tid {
 765         u8 ra[ETH_ALEN];
 766         u16 tid;
 767 };
 768
 769 /* Parsed Information Elements */
 770 struct ieee802_11_elems {
 771         /* pointers to IEs */
 772         u8 *ssid;
 773         u8 *supp_rates;
 774         u8 *fh_params;
 775         u8 *ds_params;
 776         u8 *cf_params;
 777         u8 *tim;
 778         u8 *ibss_params;
 779         u8 *challenge;
 780         u8 *wpa;
 781         u8 *rsn;
 782         u8 *erp_info;
 783         u8 *ext_supp_rates;
 784         u8 *wmm_info;
 785         u8 *wmm_param;
 786         u8 *ht_cap_elem;
 787         u8 *ht_info_elem;
 788         u8 *mesh_config;
 789         u8 *mesh_id;
 790         u8 *peer_link;
 791         u8 *preq;
 792         u8 *prep;
 793         u8 *perr;
 794         u8 *ch_switch_elem;
 795         u8 *country_elem;
 796         u8 *pwr_constr_elem;
 797         u8 *quiet_elem;         /* first quite element */
 798
 799         /* length of them, respectively */
 800         u8 ssid_len;
 801         u8 supp_rates_len;
 802         u8 fh_params_len;
 803         u8 ds_params_len;
 804         u8 cf_params_len;
 805         u8 tim_len;
 806         u8 ibss_params_len;
 807         u8 challenge_len;
 808         u8 wpa_len;
 809         u8 rsn_len;
 810         u8 erp_info_len;
 811         u8 ext_supp_rates_len;
 812         u8 wmm_info_len;
 813         u8 wmm_param_len;
 814         u8 ht_cap_elem_len;
 815         u8 ht_info_elem_len;
 816         u8 mesh_config_len;
 817         u8 mesh_id_len;
 818         u8 peer_link_len;
 819         u8 preq_len;
 820         u8 prep_len;
 821         u8 perr_len;
 822         u8 ch_switch_elem_len;
 823         u8 country_elem_len;
 824         u8 pwr_constr_elem_len;
 825         u8 quiet_elem_len;
 826         u8 num_of_quiet_elem;   /* can be more the one */
 827 };
 828
 829 static inline struct ieee80211_local *hw_to_local(
 830         struct ieee80211_hw *hw)
 831 {
 832         return container_of(hw, struct ieee80211_local, hw);
 833 }
 834
 835 static inline struct ieee80211_hw *local_to_hw(
 836         struct ieee80211_local *local)
 837 {
 838         return &local->hw;
 839 }
 840
 841 struct sta_attribute {
 842         struct attribute attr;
 843         ssize_t (*show)(const struct sta_info *, char *buf);
 844         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 845 };
 846
 847 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 848 {
 849         return compare_ether_addr(raddr, addr) == 0 ||
 850                is_broadcast_ether_addr(raddr);
 851 }
 852
 853
 854 /* ieee80211.c */
 855 int ieee80211_hw_config(struct ieee80211_local *local);
 856 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 857 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 858 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 859                         struct ieee80211_ht_info *req_ht_cap,
 860                         struct ieee80211_ht_bss_info *req_bss_cap);
 861
 862 /* ieee80211_ioctl.c */
 863 extern const struct iw_handler_def ieee80211_iw_handler_def;
 864 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
 865
 866 /* ieee80211_sta.c */
 867 void ieee80211_sta_timer(unsigned long data);
 868 void ieee80211_sta_work(struct work_struct *work);
 869 void ieee80211_sta_scan_work(struct work_struct *work);
 870 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 871                            struct ieee80211_rx_status *rx_status);
 872 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 873 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 874 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 875 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len);
 876 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 877                             struct ieee80211_if_sta *ifsta);
 878 int ieee80211_sta_scan_results(struct ieee80211_local *local,
 879                                struct iw_request_info *info,
 880                                char *buf, size_t len);
 881 ieee80211_rx_result ieee80211_sta_rx_scan(
 882         struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 883         struct ieee80211_rx_status *rx_status);
 884 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 885 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 886 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len);
 887 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 888                                         struct sk_buff *skb, u8 *bssid,
 889                                         u8 *addr, u64 supp_rates);
 890 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 891 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 892 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 893                                       u32 changed);
 894 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 895 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 896                                    struct ieee80211_ht_info *ht_info);
 897 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 898                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 899                         struct ieee80211_ht_bss_info *bss_info);
 900 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
 901                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 902                                   u16 agg_size, u16 timeout);
 903 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
 904                                 u16 initiator, u16 reason_code);
 905 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 906
 907 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 908                                 u16 tid, u16 initiator, u16 reason);
 909 void sta_addba_resp_timer_expired(unsigned long data);
 910 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 911 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 912                             struct ieee802_11_elems *elems,
 913                             enum ieee80211_band band);
 914 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 915                 int encrypt);
 916 void ieee802_11_parse_elems(u8 *start, size_t len,
 917                                    struct ieee802_11_elems *elems);
 918
 919 #ifdef CONFIG_MAC80211_MESH
 920 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
 921 #else
 922 static inline void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 923 {}
 924 #endif
 925
 926 /* interface handling */
 927 void ieee80211_if_setup(struct net_device *dev);
 928 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 929                      struct net_device **new_dev, enum ieee80211_if_types type,
 930                      struct vif_params *params);
 931 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 932                              enum ieee80211_if_types type);
 933 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 934 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 935
 936 /* tx handling */
 937 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 938 void ieee80211_tx_pending(unsigned long data);
 939 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 940 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 941 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 942
 943 /* utility functions/constants */
 944 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 945 extern const unsigned char rfc1042_header[6];
 946 extern const unsigned char bridge_tunnel_header[6];
 947 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 948                         enum ieee80211_if_types type);
 949 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 950                              int rate, int erp, int short_preamble);
 951 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
 952                                      struct ieee80211_hdr *hdr);
 953
 954 #ifdef CONFIG_MAC80211_NOINLINE
 955 #define debug_noinline noinline
 956 #else
 957 #define debug_noinline
 958 #endif
 959
 960 #endif /* IEEE80211_I_H */