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 #ifndef ETH_P_PAE
  36 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
  37 #endif /* ETH_P_PAE */
  38
  39 #define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
  40
  41 #define IEEE80211_FC(type, subtype) cpu_to_le16(type | subtype)
  42
  43 struct ieee80211_local;
  44
  45 /* Maximum number of broadcast/multicast frames to buffer when some of the
  46  * associated stations are using power saving. */
  47 #define AP_MAX_BC_BUFFER 128
  48
  49 /* Maximum number of frames buffered to all STAs, including multicast frames.
  50  * Note: increasing this limit increases the potential memory requirement. Each
  51  * frame can be up to about 2 kB long. */
  52 #define TOTAL_MAX_TX_BUFFER 512
  53
  54 /* Required encryption head and tailroom */
  55 #define IEEE80211_ENCRYPT_HEADROOM 8
  56 #define IEEE80211_ENCRYPT_TAILROOM 12
  57
  58 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  59  * reception of at least three fragmented frames. This limit can be increased
  60  * by changing this define, at the cost of slower frame reassembly and
  61  * increased memory use (about 2 kB of RAM per entry). */
  62 #define IEEE80211_FRAGMENT_MAX 4
  63
  64 struct ieee80211_fragment_entry {
  65         unsigned long first_frag_time;
  66         unsigned int seq;
  67         unsigned int rx_queue;
  68         unsigned int last_frag;
  69         unsigned int extra_len;
  70         struct sk_buff_head skb_list;
  71         int ccmp; /* Whether fragments were encrypted with CCMP */
  72         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  73 };
  74
  75
  76 struct ieee80211_sta_bss {
  77         struct list_head list;
  78         struct ieee80211_sta_bss *hnext;
  79         size_t ssid_len;
  80
  81         atomic_t users;
  82
  83         u8 bssid[ETH_ALEN];
  84         u8 ssid[IEEE80211_MAX_SSID_LEN];
  85         u16 capability; /* host byte order */
  86         enum ieee80211_band band;
  87         int freq;
  88         int signal, noise, qual;
  89         u8 *wpa_ie;
  90         size_t wpa_ie_len;
  91         u8 *rsn_ie;
  92         size_t rsn_ie_len;
  93         u8 *wmm_ie;
  94         size_t wmm_ie_len;
  95         u8 *ht_ie;
  96         size_t ht_ie_len;
  97         u8 *ht_add_ie;
  98         size_t ht_add_ie_len;
  99 #ifdef CONFIG_MAC80211_MESH
 100         u8 *mesh_id;
 101         size_t mesh_id_len;
 102         u8 *mesh_cfg;
 103 #endif
 104 #define IEEE80211_MAX_SUPP_RATES 32
 105         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 106         size_t supp_rates_len;
 107         u64 timestamp;
 108         int beacon_int;
 109
 110         bool probe_resp;
 111         unsigned long last_update;
 112
 113         /* during assocation, we save an ERP value from a probe response so
 114          * that we can feed ERP info to the driver when handling the
 115          * association completes. these fields probably won't be up-to-date
 116          * otherwise, you probably don't want to use them. */
 117         int has_erp_value;
 118         u8 erp_value;
 119 };
 120
 121 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 122 {
 123 #ifdef CONFIG_MAC80211_MESH
 124         return bss->mesh_cfg;
 125 #endif
 126         return NULL;
 127 }
 128
 129 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 130 {
 131 #ifdef CONFIG_MAC80211_MESH
 132         return bss->mesh_id;
 133 #endif
 134         return NULL;
 135 }
 136
 137 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 138 {
 139 #ifdef CONFIG_MAC80211_MESH
 140         return bss->mesh_id_len;
 141 #endif
 142         return 0;
 143 }
 144
 145
 146 typedef unsigned __bitwise__ ieee80211_tx_result;
 147 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 148 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 149 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 150
 151 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 152 #define IEEE80211_TX_UNICAST            BIT(1)
 153 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 154 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 155
 156 struct ieee80211_tx_data {
 157         struct sk_buff *skb;
 158         struct net_device *dev;
 159         struct ieee80211_local *local;
 160         struct ieee80211_sub_if_data *sdata;
 161         struct sta_info *sta;
 162         struct ieee80211_key *key;
 163
 164         struct ieee80211_channel *channel;
 165         s8 rate_idx;
 166         /* use this rate (if set) for last fragment; rate can
 167          * be set to lower rate for the first fragments, e.g.,
 168          * when using CTS protection with IEEE 802.11g. */
 169         s8 last_frag_rate_idx;
 170
 171         /* Extra fragments (in addition to the first fragment
 172          * in skb) */
 173         struct sk_buff **extra_frag;
 174         int num_extra_frag;
 175
 176         u16 fc, ethertype;
 177         unsigned int flags;
 178 };
 179
 180
 181 typedef unsigned __bitwise__ ieee80211_rx_result;
 182 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 183 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 184 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 185 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 186
 187 #define IEEE80211_RX_IN_SCAN            BIT(0)
 188 /* frame is destined to interface currently processed (incl. multicast frames) */
 189 #define IEEE80211_RX_RA_MATCH           BIT(1)
 190 #define IEEE80211_RX_AMSDU              BIT(2)
 191 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 192 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 193
 194 struct ieee80211_rx_data {
 195         struct sk_buff *skb;
 196         struct net_device *dev;
 197         struct ieee80211_local *local;
 198         struct ieee80211_sub_if_data *sdata;
 199         struct sta_info *sta;
 200         struct ieee80211_key *key;
 201         struct ieee80211_rx_status *status;
 202         struct ieee80211_rate *rate;
 203
 204         u16 fc, ethertype;
 205         unsigned int flags;
 206         int sent_ps_buffered;
 207         int queue;
 208         u32 tkip_iv32;
 209         u16 tkip_iv16;
 210 };
 211
 212 struct ieee80211_tx_stored_packet {
 213         struct sk_buff *skb;
 214         struct sk_buff **extra_frag;
 215         s8 last_frag_rate_idx;
 216         int num_extra_frag;
 217         bool last_frag_rate_ctrl_probe;
 218 };
 219
 220 struct beacon_data {
 221         u8 *head, *tail;
 222         int head_len, tail_len;
 223         int dtim_period;
 224 };
 225
 226 struct ieee80211_if_ap {
 227         struct beacon_data *beacon;
 228
 229         struct list_head vlans;
 230
 231         u8 ssid[IEEE80211_MAX_SSID_LEN];
 232         size_t ssid_len;
 233
 234         /* yes, this looks ugly, but guarantees that we can later use
 235          * bitmap_empty :)
 236          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 237         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 238         struct sk_buff_head ps_bc_buf;
 239         atomic_t num_sta_ps; /* number of stations in PS mode */
 240         int dtim_count;
 241         int num_beacons; /* number of TXed beacon frames for this BSS */
 242 };
 243
 244 struct ieee80211_if_wds {
 245         struct sta_info *sta;
 246         u8 remote_addr[ETH_ALEN];
 247 };
 248
 249 struct ieee80211_if_vlan {
 250         struct list_head list;
 251 };
 252
 253 struct mesh_stats {
 254         __u32 fwded_frames;             /* Mesh forwarded frames */
 255         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 256         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 257         atomic_t estab_plinks;
 258 };
 259
 260 #define PREQ_Q_F_START          0x1
 261 #define PREQ_Q_F_REFRESH        0x2
 262 struct mesh_preq_queue {
 263         struct list_head list;
 264         u8 dst[ETH_ALEN];
 265         u8 flags;
 266 };
 267
 268 struct mesh_config {
 269         /* Timeouts in ms */
 270         /* Mesh plink management parameters */
 271         u16 dot11MeshRetryTimeout;
 272         u16 dot11MeshConfirmTimeout;
 273         u16 dot11MeshHoldingTimeout;
 274         u16 dot11MeshMaxPeerLinks;
 275         u8  dot11MeshMaxRetries;
 276         u8  dot11MeshTTL;
 277         bool auto_open_plinks;
 278         /* HWMP parameters */
 279         u8  dot11MeshHWMPmaxPREQretries;
 280         u32 path_refresh_time;
 281         u16 min_discovery_timeout;
 282         u32 dot11MeshHWMPactivePathTimeout;
 283         u16 dot11MeshHWMPpreqMinInterval;
 284         u16 dot11MeshHWMPnetDiameterTraversalTime;
 285 };
 286
 287
 288 /* flags used in struct ieee80211_if_sta.flags */
 289 #define IEEE80211_STA_SSID_SET          BIT(0)
 290 #define IEEE80211_STA_BSSID_SET         BIT(1)
 291 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 292 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 293 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 294 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 295 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 296 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 297 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 298 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 299 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 300 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 301 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 302 struct ieee80211_if_sta {
 303         struct timer_list timer;
 304         struct work_struct work;
 305         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 306         u8 ssid[IEEE80211_MAX_SSID_LEN];
 307         enum {
 308                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 309                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 310                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED,
 311                 IEEE80211_MESH_UP
 312         } state;
 313         size_t ssid_len;
 314         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 315         size_t scan_ssid_len;
 316 #ifdef CONFIG_MAC80211_MESH
 317         struct timer_list mesh_path_timer;
 318         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 319         size_t mesh_id_len;
 320         /* Active Path Selection Protocol Identifier */
 321         u8 mesh_pp_id[4];
 322         /* Active Path Selection Metric Identifier */
 323         u8 mesh_pm_id[4];
 324         /* Congestion Control Mode Identifier */
 325         u8 mesh_cc_id[4];
 326         /* Local mesh Destination Sequence Number */
 327         u32 dsn;
 328         /* Last used PREQ ID */
 329         u32 preq_id;
 330         atomic_t mpaths;
 331         /* Timestamp of last DSN update */
 332         unsigned long last_dsn_update;
 333         /* Timestamp of last DSN sent */
 334         unsigned long last_preq;
 335         struct mesh_rmc *rmc;
 336         spinlock_t mesh_preq_queue_lock;
 337         struct mesh_preq_queue preq_queue;
 338         int preq_queue_len;
 339         struct mesh_stats mshstats;
 340         struct mesh_config mshcfg;
 341         u32 mesh_seqnum;
 342         bool accepting_plinks;
 343 #endif
 344         u16 aid;
 345         u16 ap_capab, capab;
 346         u8 *extra_ie; /* to be added to the end of AssocReq */
 347         size_t extra_ie_len;
 348
 349         /* The last AssocReq/Resp IEs */
 350         u8 *assocreq_ies, *assocresp_ies;
 351         size_t assocreq_ies_len, assocresp_ies_len;
 352
 353         struct sk_buff_head skb_queue;
 354
 355         int auth_tries, assoc_tries;
 356
 357         unsigned long request;
 358
 359         unsigned long last_probe;
 360
 361         unsigned int flags;
 362 #define IEEE80211_STA_REQ_SCAN 0
 363 #define IEEE80211_STA_REQ_AUTH 1
 364 #define IEEE80211_STA_REQ_RUN  2
 365
 366 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 367 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 368 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 369         unsigned int auth_algs; /* bitfield of allowed auth algs */
 370         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 371         int auth_transaction;
 372
 373         unsigned long ibss_join_req;
 374         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 375         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 376
 377         int wmm_last_param_set;
 378         int num_beacons; /* number of TXed beacon frames by this STA */
 379 };
 380
 381 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 382                                                 u8 mesh_id_len, u8 *mesh_id)
 383 {
 384 #ifdef CONFIG_MAC80211_MESH
 385         ifsta->mesh_id_len = mesh_id_len;
 386         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 387 #endif
 388 }
 389
 390 #ifdef CONFIG_MAC80211_MESH
 391 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 392         do { (sta)->mshstats.name++; } while (0)
 393 #else
 394 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 395         do { } while (0)
 396 #endif
 397
 398 /* flags used in struct ieee80211_sub_if_data.flags */
 399 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 400 #define IEEE80211_SDATA_PROMISC         BIT(1)
 401 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 402 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 403 struct ieee80211_sub_if_data {
 404         struct list_head list;
 405
 406         struct wireless_dev wdev;
 407
 408         /* keys */
 409         struct list_head key_list;
 410
 411         struct net_device *dev;
 412         struct ieee80211_local *local;
 413
 414         unsigned int flags;
 415
 416         int drop_unencrypted;
 417
 418         /*
 419          * basic rates of this AP or the AP we're associated to
 420          */
 421         u64 basic_rates;
 422
 423         /* Fragment table for host-based reassembly */
 424         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 425         unsigned int fragment_next;
 426
 427 #define NUM_DEFAULT_KEYS 4
 428         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 429         struct ieee80211_key *default_key;
 430
 431         /* BSS configuration for this interface. */
 432         struct ieee80211_bss_conf bss_conf;
 433
 434         /*
 435          * AP this belongs to: self in AP mode and
 436          * corresponding AP in VLAN mode, NULL for
 437          * all others (might be needed later in IBSS)
 438          */
 439         struct ieee80211_if_ap *bss;
 440
 441         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 442         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 443
 444         union {
 445                 struct ieee80211_if_ap ap;
 446                 struct ieee80211_if_wds wds;
 447                 struct ieee80211_if_vlan vlan;
 448                 struct ieee80211_if_sta sta;
 449                 u32 mntr_flags;
 450         } u;
 451
 452 #ifdef CONFIG_MAC80211_DEBUGFS
 453         struct dentry *debugfsdir;
 454         union {
 455                 struct {
 456                         struct dentry *drop_unencrypted;
 457                         struct dentry *state;
 458                         struct dentry *bssid;
 459                         struct dentry *prev_bssid;
 460                         struct dentry *ssid_len;
 461                         struct dentry *aid;
 462                         struct dentry *ap_capab;
 463                         struct dentry *capab;
 464                         struct dentry *extra_ie_len;
 465                         struct dentry *auth_tries;
 466                         struct dentry *assoc_tries;
 467                         struct dentry *auth_algs;
 468                         struct dentry *auth_alg;
 469                         struct dentry *auth_transaction;
 470                         struct dentry *flags;
 471                         struct dentry *num_beacons_sta;
 472                 } sta;
 473                 struct {
 474                         struct dentry *drop_unencrypted;
 475                         struct dentry *num_sta_ps;
 476                         struct dentry *dtim_count;
 477                         struct dentry *num_beacons;
 478                         struct dentry *force_unicast_rateidx;
 479                         struct dentry *max_ratectrl_rateidx;
 480                         struct dentry *num_buffered_multicast;
 481                 } ap;
 482                 struct {
 483                         struct dentry *drop_unencrypted;
 484                         struct dentry *peer;
 485                 } wds;
 486                 struct {
 487                         struct dentry *drop_unencrypted;
 488                 } vlan;
 489                 struct {
 490                         struct dentry *mode;
 491                 } monitor;
 492                 struct dentry *default_key;
 493         } debugfs;
 494
 495 #ifdef CONFIG_MAC80211_MESH
 496         struct dentry *mesh_stats_dir;
 497         struct {
 498                 struct dentry *fwded_frames;
 499                 struct dentry *dropped_frames_ttl;
 500                 struct dentry *dropped_frames_no_route;
 501                 struct dentry *estab_plinks;
 502                 struct timer_list mesh_path_timer;
 503         } mesh_stats;
 504
 505         struct dentry *mesh_config_dir;
 506         struct {
 507                 struct dentry *dot11MeshRetryTimeout;
 508                 struct dentry *dot11MeshConfirmTimeout;
 509                 struct dentry *dot11MeshHoldingTimeout;
 510                 struct dentry *dot11MeshMaxRetries;
 511                 struct dentry *dot11MeshTTL;
 512                 struct dentry *auto_open_plinks;
 513                 struct dentry *dot11MeshMaxPeerLinks;
 514                 struct dentry *dot11MeshHWMPactivePathTimeout;
 515                 struct dentry *dot11MeshHWMPpreqMinInterval;
 516                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 517                 struct dentry *dot11MeshHWMPmaxPREQretries;
 518                 struct dentry *path_refresh_time;
 519                 struct dentry *min_discovery_timeout;
 520         } mesh_config;
 521 #endif
 522
 523 #endif
 524         /* must be last, dynamically sized area in this! */
 525         struct ieee80211_vif vif;
 526 };
 527
 528 static inline
 529 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 530 {
 531         return container_of(p, struct ieee80211_sub_if_data, vif);
 532 }
 533
 534 enum {
 535         IEEE80211_RX_MSG        = 1,
 536         IEEE80211_TX_STATUS_MSG = 2,
 537         IEEE80211_DELBA_MSG     = 3,
 538         IEEE80211_ADDBA_MSG     = 4,
 539 };
 540
 541 /* maximum number of hardware queues we support. */
 542 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 543
 544 struct ieee80211_local {
 545         /* embed the driver visible part.
 546          * don't cast (use the static inlines below), but we keep
 547          * it first anyway so they become a no-op */
 548         struct ieee80211_hw hw;
 549
 550         const struct ieee80211_ops *ops;
 551
 552         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 553
 554         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 555         int open_count;
 556         int monitors, cooked_mntrs;
 557         /* number of interfaces with corresponding FIF_ flags */
 558         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 559         unsigned int filter_flags; /* FIF_* */
 560         struct iw_statistics wstats;
 561         u8 wstats_flags;
 562         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 563         int tx_headroom; /* required headroom for hardware/radiotap */
 564
 565         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 566          * added to skb_queue will be processed, but frames in
 567          * skb_queue_unreliable may be dropped if the total length of these
 568          * queues increases over the limit. */
 569 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 570         struct tasklet_struct tasklet;
 571         struct sk_buff_head skb_queue;
 572         struct sk_buff_head skb_queue_unreliable;
 573
 574         /* Station data */
 575         /*
 576          * The lock only protects the list, hash, timer and counter
 577          * against manipulation, reads are done in RCU. Additionally,
 578          * the lock protects each BSS's TIM bitmap.
 579          */
 580         spinlock_t sta_lock;
 581         unsigned long num_sta;
 582         struct list_head sta_list;
 583         struct list_head sta_flush_list;
 584         struct work_struct sta_flush_work;
 585         struct sta_info *sta_hash[STA_HASH_SIZE];
 586         struct timer_list sta_cleanup;
 587
 588         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 589         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 590         struct tasklet_struct tx_pending_tasklet;
 591
 592         /* number of interfaces with corresponding IFF_ flags */
 593         atomic_t iff_allmultis, iff_promiscs;
 594
 595         struct rate_control_ref *rate_ctrl;
 596
 597         int rts_threshold;
 598         int fragmentation_threshold;
 599         int short_retry_limit; /* dot11ShortRetryLimit */
 600         int long_retry_limit; /* dot11LongRetryLimit */
 601
 602         struct crypto_blkcipher *wep_tx_tfm;
 603         struct crypto_blkcipher *wep_rx_tfm;
 604         u32 wep_iv;
 605
 606         int bridge_packets; /* bridge packets between associated stations and
 607                              * deliver multicast frames both back to wireless
 608                              * media and to the local net stack */
 609
 610         struct list_head interfaces;
 611
 612         /*
 613          * Key lock, protects sdata's key_list and sta_info's
 614          * key pointers (write access, they're RCU.)
 615          */
 616         spinlock_t key_lock;
 617
 618
 619         bool sta_sw_scanning;
 620         bool sta_hw_scanning;
 621         int scan_channel_idx;
 622         enum ieee80211_band scan_band;
 623
 624         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 625         unsigned long last_scan_completed;
 626         struct delayed_work scan_work;
 627         struct net_device *scan_dev;
 628         struct ieee80211_channel *oper_channel, *scan_channel;
 629         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 630         size_t scan_ssid_len;
 631         struct list_head sta_bss_list;
 632         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 633         spinlock_t sta_bss_lock;
 634
 635         /* SNMP counters */
 636         /* dot11CountersTable */
 637         u32 dot11TransmittedFragmentCount;
 638         u32 dot11MulticastTransmittedFrameCount;
 639         u32 dot11FailedCount;
 640         u32 dot11RetryCount;
 641         u32 dot11MultipleRetryCount;
 642         u32 dot11FrameDuplicateCount;
 643         u32 dot11ReceivedFragmentCount;
 644         u32 dot11MulticastReceivedFrameCount;
 645         u32 dot11TransmittedFrameCount;
 646         u32 dot11WEPUndecryptableCount;
 647
 648 #ifdef CONFIG_MAC80211_LEDS
 649         int tx_led_counter, rx_led_counter;
 650         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 651         char tx_led_name[32], rx_led_name[32],
 652              assoc_led_name[32], radio_led_name[32];
 653 #endif
 654
 655 #ifdef CONFIG_MAC80211_DEBUGFS
 656         struct work_struct sta_debugfs_add;
 657 #endif
 658
 659 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 660         /* TX/RX handler statistics */
 661         unsigned int tx_handlers_drop;
 662         unsigned int tx_handlers_queued;
 663         unsigned int tx_handlers_drop_unencrypted;
 664         unsigned int tx_handlers_drop_fragment;
 665         unsigned int tx_handlers_drop_wep;
 666         unsigned int tx_handlers_drop_not_assoc;
 667         unsigned int tx_handlers_drop_unauth_port;
 668         unsigned int rx_handlers_drop;
 669         unsigned int rx_handlers_queued;
 670         unsigned int rx_handlers_drop_nullfunc;
 671         unsigned int rx_handlers_drop_defrag;
 672         unsigned int rx_handlers_drop_short;
 673         unsigned int rx_handlers_drop_passive_scan;
 674         unsigned int tx_expand_skb_head;
 675         unsigned int tx_expand_skb_head_cloned;
 676         unsigned int rx_expand_skb_head;
 677         unsigned int rx_expand_skb_head2;
 678         unsigned int rx_handlers_fragments;
 679         unsigned int tx_status_drop;
 680 #define I802_DEBUG_INC(c) (c)++
 681 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 682 #define I802_DEBUG_INC(c) do { } while (0)
 683 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 684
 685
 686         int total_ps_buffered; /* total number of all buffered unicast and
 687                                 * multicast packets for power saving stations
 688                                 */
 689         int wifi_wme_noack_test;
 690         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 691
 692 #ifdef CONFIG_MAC80211_DEBUGFS
 693         struct local_debugfsdentries {
 694                 struct dentry *frequency;
 695                 struct dentry *antenna_sel_tx;
 696                 struct dentry *antenna_sel_rx;
 697                 struct dentry *bridge_packets;
 698                 struct dentry *rts_threshold;
 699                 struct dentry *fragmentation_threshold;
 700                 struct dentry *short_retry_limit;
 701                 struct dentry *long_retry_limit;
 702                 struct dentry *total_ps_buffered;
 703                 struct dentry *wep_iv;
 704                 struct dentry *statistics;
 705                 struct local_debugfsdentries_statsdentries {
 706                         struct dentry *transmitted_fragment_count;
 707                         struct dentry *multicast_transmitted_frame_count;
 708                         struct dentry *failed_count;
 709                         struct dentry *retry_count;
 710                         struct dentry *multiple_retry_count;
 711                         struct dentry *frame_duplicate_count;
 712                         struct dentry *received_fragment_count;
 713                         struct dentry *multicast_received_frame_count;
 714                         struct dentry *transmitted_frame_count;
 715                         struct dentry *wep_undecryptable_count;
 716                         struct dentry *num_scans;
 717 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 718                         struct dentry *tx_handlers_drop;
 719                         struct dentry *tx_handlers_queued;
 720                         struct dentry *tx_handlers_drop_unencrypted;
 721                         struct dentry *tx_handlers_drop_fragment;
 722                         struct dentry *tx_handlers_drop_wep;
 723                         struct dentry *tx_handlers_drop_not_assoc;
 724                         struct dentry *tx_handlers_drop_unauth_port;
 725                         struct dentry *rx_handlers_drop;
 726                         struct dentry *rx_handlers_queued;
 727                         struct dentry *rx_handlers_drop_nullfunc;
 728                         struct dentry *rx_handlers_drop_defrag;
 729                         struct dentry *rx_handlers_drop_short;
 730                         struct dentry *rx_handlers_drop_passive_scan;
 731                         struct dentry *tx_expand_skb_head;
 732                         struct dentry *tx_expand_skb_head_cloned;
 733                         struct dentry *rx_expand_skb_head;
 734                         struct dentry *rx_expand_skb_head2;
 735                         struct dentry *rx_handlers_fragments;
 736                         struct dentry *tx_status_drop;
 737 #endif
 738                         struct dentry *dot11ACKFailureCount;
 739                         struct dentry *dot11RTSFailureCount;
 740                         struct dentry *dot11FCSErrorCount;
 741                         struct dentry *dot11RTSSuccessCount;
 742                 } stats;
 743                 struct dentry *stations;
 744                 struct dentry *keys;
 745         } debugfs;
 746 #endif
 747 };
 748
 749 static inline struct ieee80211_sub_if_data *
 750 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 751 {
 752         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 753
 754         BUG_ON(!local || local->mdev == dev);
 755
 756         return netdev_priv(dev);
 757 }
 758
 759 /* this struct represents 802.11n's RA/TID combination */
 760 struct ieee80211_ra_tid {
 761         u8 ra[ETH_ALEN];
 762         u16 tid;
 763 };
 764
 765 /* Parsed Information Elements */
 766 struct ieee802_11_elems {
 767         /* pointers to IEs */
 768         u8 *ssid;
 769         u8 *supp_rates;
 770         u8 *fh_params;
 771         u8 *ds_params;
 772         u8 *cf_params;
 773         u8 *tim;
 774         u8 *ibss_params;
 775         u8 *challenge;
 776         u8 *wpa;
 777         u8 *rsn;
 778         u8 *erp_info;
 779         u8 *ext_supp_rates;
 780         u8 *wmm_info;
 781         u8 *wmm_param;
 782         u8 *ht_cap_elem;
 783         u8 *ht_info_elem;
 784         u8 *mesh_config;
 785         u8 *mesh_id;
 786         u8 *peer_link;
 787         u8 *preq;
 788         u8 *prep;
 789         u8 *perr;
 790         u8 *ch_switch_elem;
 791         u8 *country_elem;
 792         u8 *pwr_constr_elem;
 793         u8 *quiet_elem;         /* first quite element */
 794
 795         /* length of them, respectively */
 796         u8 ssid_len;
 797         u8 supp_rates_len;
 798         u8 fh_params_len;
 799         u8 ds_params_len;
 800         u8 cf_params_len;
 801         u8 tim_len;
 802         u8 ibss_params_len;
 803         u8 challenge_len;
 804         u8 wpa_len;
 805         u8 rsn_len;
 806         u8 erp_info_len;
 807         u8 ext_supp_rates_len;
 808         u8 wmm_info_len;
 809         u8 wmm_param_len;
 810         u8 ht_cap_elem_len;
 811         u8 ht_info_elem_len;
 812         u8 mesh_config_len;
 813         u8 mesh_id_len;
 814         u8 peer_link_len;
 815         u8 preq_len;
 816         u8 prep_len;
 817         u8 perr_len;
 818         u8 ch_switch_elem_len;
 819         u8 country_elem_len;
 820         u8 pwr_constr_elem_len;
 821         u8 quiet_elem_len;
 822         u8 num_of_quiet_elem;   /* can be more the one */
 823 };
 824
 825 static inline struct ieee80211_local *hw_to_local(
 826         struct ieee80211_hw *hw)
 827 {
 828         return container_of(hw, struct ieee80211_local, hw);
 829 }
 830
 831 static inline struct ieee80211_hw *local_to_hw(
 832         struct ieee80211_local *local)
 833 {
 834         return &local->hw;
 835 }
 836
 837 struct sta_attribute {
 838         struct attribute attr;
 839         ssize_t (*show)(const struct sta_info *, char *buf);
 840         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 841 };
 842
 843 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 844 {
 845         return compare_ether_addr(raddr, addr) == 0 ||
 846                is_broadcast_ether_addr(raddr);
 847 }
 848
 849
 850 /* ieee80211.c */
 851 int ieee80211_hw_config(struct ieee80211_local *local);
 852 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 853 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 854 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 855                         struct ieee80211_ht_info *req_ht_cap,
 856                         struct ieee80211_ht_bss_info *req_bss_cap);
 857
 858 /* ieee80211_ioctl.c */
 859 extern const struct iw_handler_def ieee80211_iw_handler_def;
 860 int ieee80211_set_freq(struct net_device *dev, int freq);
 861
 862 /* ieee80211_sta.c */
 863 void ieee80211_sta_timer(unsigned long data);
 864 void ieee80211_sta_work(struct work_struct *work);
 865 void ieee80211_sta_scan_work(struct work_struct *work);
 866 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 867                            struct ieee80211_rx_status *rx_status);
 868 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 869 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 870 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 871 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 872 void ieee80211_sta_req_auth(struct net_device *dev,
 873                             struct ieee80211_if_sta *ifsta);
 874 int ieee80211_sta_scan_results(struct net_device *dev,
 875                                struct iw_request_info *info,
 876                                char *buf, size_t len);
 877 ieee80211_rx_result ieee80211_sta_rx_scan(
 878         struct net_device *dev, struct sk_buff *skb,
 879         struct ieee80211_rx_status *rx_status);
 880 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 881 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 882 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 883 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
 884                                         struct sk_buff *skb, u8 *bssid,
 885                                         u8 *addr, u64 supp_rates);
 886 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 887 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 888 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 889                                       u32 changed);
 890 u32 ieee80211_reset_erp_info(struct net_device *dev);
 891 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 892                                    struct ieee80211_ht_info *ht_info);
 893 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 894                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 895                         struct ieee80211_ht_bss_info *bss_info);
 896 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
 897                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 898                                   u16 agg_size, u16 timeout);
 899 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
 900                                 u16 initiator, u16 reason_code);
 901 void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn);
 902
 903 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
 904                                 u16 tid, u16 initiator, u16 reason);
 905 void sta_addba_resp_timer_expired(unsigned long data);
 906 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
 907 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 908                             struct ieee802_11_elems *elems,
 909                             enum ieee80211_band band);
 910 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 911                 int encrypt);
 912 void ieee802_11_parse_elems(u8 *start, size_t len,
 913                                    struct ieee802_11_elems *elems);
 914
 915 #ifdef CONFIG_MAC80211_MESH
 916 void ieee80211_start_mesh(struct net_device *dev);
 917 #else
 918 static inline void ieee80211_start_mesh(struct net_device *dev)
 919 {}
 920 #endif
 921
 922 /* interface handling */
 923 void ieee80211_if_setup(struct net_device *dev);
 924 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 925                      struct net_device **new_dev, enum ieee80211_if_types type,
 926                      struct vif_params *params);
 927 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 928                              enum ieee80211_if_types type);
 929 void ieee80211_if_remove(struct net_device *dev);
 930 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 931
 932 /* tx handling */
 933 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 934 void ieee80211_tx_pending(unsigned long data);
 935 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 936 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 937 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 938
 939 /* utility functions/constants */
 940 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 941 extern const unsigned char rfc1042_header[6];
 942 extern const unsigned char bridge_tunnel_header[6];
 943 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 944                         enum ieee80211_if_types type);
 945 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 946                              int rate, int erp, int short_preamble);
 947 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 948                                      struct ieee80211_hdr *hdr);
 949
 950 #ifdef CONFIG_MAC80211_NOINLINE
 951 #define debug_noinline noinline
 952 #else
 953 #define debug_noinline
 954 #endif
 955
 956 #endif /* IEEE80211_I_H */