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 /*
  57  * Time after which we ignore scan results and no longer report/use
  58  * them in any way.
  59  */
  60 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  61
  62 struct ieee80211_fragment_entry {
  63         unsigned long first_frag_time;
  64         unsigned int seq;
  65         unsigned int rx_queue;
  66         unsigned int last_frag;
  67         unsigned int extra_len;
  68         struct sk_buff_head skb_list;
  69         int ccmp; /* Whether fragments were encrypted with CCMP */
  70         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  71 };
  72
  73
  74 struct ieee80211_sta_bss {
  75         struct list_head list;
  76         struct ieee80211_sta_bss *hnext;
  77         size_t ssid_len;
  78
  79         atomic_t users;
  80
  81         u8 bssid[ETH_ALEN];
  82         u8 ssid[IEEE80211_MAX_SSID_LEN];
  83         u8 dtim_period;
  84         u16 capability; /* host byte order */
  85         enum ieee80211_band band;
  86         int freq;
  87         int signal, noise, qual;
  88         u8 *ies; /* all information elements from the last Beacon or Probe
  89                   * Response frames; note Beacon frame is not allowed to
  90                   * override values from Probe Response */
  91         size_t ies_len;
  92         bool wmm_used;
  93 #ifdef CONFIG_MAC80211_MESH
  94         u8 *mesh_id;
  95         size_t mesh_id_len;
  96         u8 *mesh_cfg;
  97 #endif
  98 #define IEEE80211_MAX_SUPP_RATES 32
  99         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 100         size_t supp_rates_len;
 101         u64 timestamp;
 102         int beacon_int;
 103
 104         unsigned long last_probe_resp;
 105         unsigned long last_update;
 106
 107         /* during assocation, we save an ERP value from a probe response so
 108          * that we can feed ERP info to the driver when handling the
 109          * association completes. these fields probably won't be up-to-date
 110          * otherwise, you probably don't want to use them. */
 111         int has_erp_value;
 112         u8 erp_value;
 113 };
 114
 115 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 116 {
 117 #ifdef CONFIG_MAC80211_MESH
 118         return bss->mesh_cfg;
 119 #endif
 120         return NULL;
 121 }
 122
 123 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 124 {
 125 #ifdef CONFIG_MAC80211_MESH
 126         return bss->mesh_id;
 127 #endif
 128         return NULL;
 129 }
 130
 131 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 132 {
 133 #ifdef CONFIG_MAC80211_MESH
 134         return bss->mesh_id_len;
 135 #endif
 136         return 0;
 137 }
 138
 139
 140 typedef unsigned __bitwise__ ieee80211_tx_result;
 141 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 142 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 143 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 144
 145 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 146 #define IEEE80211_TX_UNICAST            BIT(1)
 147 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 148 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 149
 150 struct ieee80211_tx_data {
 151         struct sk_buff *skb;
 152         struct net_device *dev;
 153         struct ieee80211_local *local;
 154         struct ieee80211_sub_if_data *sdata;
 155         struct sta_info *sta;
 156         struct ieee80211_key *key;
 157
 158         struct ieee80211_channel *channel;
 159         s8 rate_idx;
 160         /* use this rate (if set) for last fragment; rate can
 161          * be set to lower rate for the first fragments, e.g.,
 162          * when using CTS protection with IEEE 802.11g. */
 163         s8 last_frag_rate_idx;
 164
 165         /* Extra fragments (in addition to the first fragment
 166          * in skb) */
 167         struct sk_buff **extra_frag;
 168         int num_extra_frag;
 169
 170         u16 ethertype;
 171         unsigned int flags;
 172 };
 173
 174
 175 typedef unsigned __bitwise__ ieee80211_rx_result;
 176 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 177 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 178 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 179 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 180
 181 #define IEEE80211_RX_IN_SCAN            BIT(0)
 182 /* frame is destined to interface currently processed (incl. multicast frames) */
 183 #define IEEE80211_RX_RA_MATCH           BIT(1)
 184 #define IEEE80211_RX_AMSDU              BIT(2)
 185 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 186 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 187
 188 struct ieee80211_rx_data {
 189         struct sk_buff *skb;
 190         struct net_device *dev;
 191         struct ieee80211_local *local;
 192         struct ieee80211_sub_if_data *sdata;
 193         struct sta_info *sta;
 194         struct ieee80211_key *key;
 195         struct ieee80211_rx_status *status;
 196         struct ieee80211_rate *rate;
 197
 198         u16 ethertype;
 199         unsigned int flags;
 200         int sent_ps_buffered;
 201         int queue;
 202         u32 tkip_iv32;
 203         u16 tkip_iv16;
 204 };
 205
 206 struct ieee80211_tx_stored_packet {
 207         struct sk_buff *skb;
 208         struct sk_buff **extra_frag;
 209         s8 last_frag_rate_idx;
 210         int num_extra_frag;
 211         bool last_frag_rate_ctrl_probe;
 212 };
 213
 214 struct beacon_data {
 215         u8 *head, *tail;
 216         int head_len, tail_len;
 217         int dtim_period;
 218 };
 219
 220 struct ieee80211_if_ap {
 221         struct beacon_data *beacon;
 222
 223         struct list_head vlans;
 224
 225         u8 ssid[IEEE80211_MAX_SSID_LEN];
 226         size_t ssid_len;
 227
 228         /* yes, this looks ugly, but guarantees that we can later use
 229          * bitmap_empty :)
 230          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 231         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 232         struct sk_buff_head ps_bc_buf;
 233         atomic_t num_sta_ps; /* number of stations in PS mode */
 234         int dtim_count;
 235         int num_beacons; /* number of TXed beacon frames for this BSS */
 236 };
 237
 238 struct ieee80211_if_wds {
 239         struct sta_info *sta;
 240         u8 remote_addr[ETH_ALEN];
 241 };
 242
 243 struct ieee80211_if_vlan {
 244         struct list_head list;
 245 };
 246
 247 struct mesh_stats {
 248         __u32 fwded_frames;             /* Mesh forwarded frames */
 249         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 250         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 251         atomic_t estab_plinks;
 252 };
 253
 254 #define PREQ_Q_F_START          0x1
 255 #define PREQ_Q_F_REFRESH        0x2
 256 struct mesh_preq_queue {
 257         struct list_head list;
 258         u8 dst[ETH_ALEN];
 259         u8 flags;
 260 };
 261
 262 struct mesh_config {
 263         /* Timeouts in ms */
 264         /* Mesh plink management parameters */
 265         u16 dot11MeshRetryTimeout;
 266         u16 dot11MeshConfirmTimeout;
 267         u16 dot11MeshHoldingTimeout;
 268         u16 dot11MeshMaxPeerLinks;
 269         u8  dot11MeshMaxRetries;
 270         u8  dot11MeshTTL;
 271         bool auto_open_plinks;
 272         /* HWMP parameters */
 273         u8  dot11MeshHWMPmaxPREQretries;
 274         u32 path_refresh_time;
 275         u16 min_discovery_timeout;
 276         u32 dot11MeshHWMPactivePathTimeout;
 277         u16 dot11MeshHWMPpreqMinInterval;
 278         u16 dot11MeshHWMPnetDiameterTraversalTime;
 279 };
 280
 281
 282 /* flags used in struct ieee80211_if_sta.flags */
 283 #define IEEE80211_STA_SSID_SET          BIT(0)
 284 #define IEEE80211_STA_BSSID_SET         BIT(1)
 285 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 286 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 287 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 288 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 289 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 290 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 291 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 292 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 293 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 294 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 295 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 296 /* flags for  MLME request*/
 297 #define IEEE80211_STA_REQ_SCAN 0
 298 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 299 #define IEEE80211_STA_REQ_AUTH 2
 300 #define IEEE80211_STA_REQ_RUN  3
 301
 302 /* flags used for setting mlme state */
 303 enum ieee80211_sta_mlme_state {
 304         IEEE80211_STA_MLME_DISABLED,
 305         IEEE80211_STA_MLME_DIRECT_PROBE,
 306         IEEE80211_STA_MLME_AUTHENTICATE,
 307         IEEE80211_STA_MLME_ASSOCIATE,
 308         IEEE80211_STA_MLME_ASSOCIATED,
 309         IEEE80211_STA_MLME_IBSS_SEARCH,
 310         IEEE80211_STA_MLME_IBSS_JOINED,
 311 };
 312
 313 /* bitfield of allowed auth algs */
 314 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 315 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 316 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 317
 318 struct ieee80211_if_sta {
 319         struct timer_list timer;
 320         struct work_struct work;
 321         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 322         u8 ssid[IEEE80211_MAX_SSID_LEN];
 323         enum ieee80211_sta_mlme_state state;
 324         size_t ssid_len;
 325         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 326         size_t scan_ssid_len;
 327         u16 aid;
 328         u16 ap_capab, capab;
 329         u8 *extra_ie; /* to be added to the end of AssocReq */
 330         size_t extra_ie_len;
 331
 332         /* The last AssocReq/Resp IEs */
 333         u8 *assocreq_ies, *assocresp_ies;
 334         size_t assocreq_ies_len, assocresp_ies_len;
 335
 336         struct sk_buff_head skb_queue;
 337
 338         int assoc_scan_tries; /* number of scans done pre-association */
 339         int direct_probe_tries; /* retries for direct probes */
 340         int auth_tries; /* retries for auth req */
 341         int assoc_tries; /* retries for assoc req */
 342
 343         unsigned long request;
 344
 345         unsigned long last_probe;
 346
 347         unsigned int flags;
 348
 349         unsigned int auth_algs; /* bitfield of allowed auth algs */
 350         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 351         int auth_transaction;
 352
 353         unsigned long ibss_join_req;
 354         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 355         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 356
 357         int wmm_last_param_set;
 358         int num_beacons; /* number of TXed beacon frames by this STA */
 359 };
 360
 361 struct ieee80211_if_mesh {
 362         struct work_struct work;
 363         struct timer_list housekeeping_timer;
 364         struct timer_list mesh_path_timer;
 365         struct sk_buff_head skb_queue;
 366
 367         bool housekeeping;
 368
 369         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 370         size_t mesh_id_len;
 371         /* Active Path Selection Protocol Identifier */
 372         u8 mesh_pp_id[4];
 373         /* Active Path Selection Metric Identifier */
 374         u8 mesh_pm_id[4];
 375         /* Congestion Control Mode Identifier */
 376         u8 mesh_cc_id[4];
 377         /* Local mesh Destination Sequence Number */
 378         u32 dsn;
 379         /* Last used PREQ ID */
 380         u32 preq_id;
 381         atomic_t mpaths;
 382         /* Timestamp of last DSN update */
 383         unsigned long last_dsn_update;
 384         /* Timestamp of last DSN sent */
 385         unsigned long last_preq;
 386         struct mesh_rmc *rmc;
 387         spinlock_t mesh_preq_queue_lock;
 388         struct mesh_preq_queue preq_queue;
 389         int preq_queue_len;
 390         struct mesh_stats mshstats;
 391         struct mesh_config mshcfg;
 392         u32 mesh_seqnum;
 393         bool accepting_plinks;
 394         int num_beacons;
 395 };
 396
 397 #ifdef CONFIG_MAC80211_MESH
 398 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 399         do { (msh)->mshstats.name++; } while (0)
 400 #else
 401 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 402         do { } while (0)
 403 #endif
 404
 405 /* flags used in struct ieee80211_sub_if_data.flags */
 406 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 407 #define IEEE80211_SDATA_PROMISC         BIT(1)
 408 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 409 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 410 struct ieee80211_sub_if_data {
 411         struct list_head list;
 412
 413         struct wireless_dev wdev;
 414
 415         /* keys */
 416         struct list_head key_list;
 417
 418         struct net_device *dev;
 419         struct ieee80211_local *local;
 420
 421         unsigned int flags;
 422
 423         int drop_unencrypted;
 424
 425         /*
 426          * basic rates of this AP or the AP we're associated to
 427          */
 428         u64 basic_rates;
 429
 430         /* Fragment table for host-based reassembly */
 431         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 432         unsigned int fragment_next;
 433
 434 #define NUM_DEFAULT_KEYS 4
 435         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 436         struct ieee80211_key *default_key;
 437
 438         /* BSS configuration for this interface. */
 439         struct ieee80211_bss_conf bss_conf;
 440
 441         /*
 442          * AP this belongs to: self in AP mode and
 443          * corresponding AP in VLAN mode, NULL for
 444          * all others (might be needed later in IBSS)
 445          */
 446         struct ieee80211_if_ap *bss;
 447
 448         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 449         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 450
 451         union {
 452                 struct ieee80211_if_ap ap;
 453                 struct ieee80211_if_wds wds;
 454                 struct ieee80211_if_vlan vlan;
 455                 struct ieee80211_if_sta sta;
 456 #ifdef CONFIG_MAC80211_MESH
 457                 struct ieee80211_if_mesh mesh;
 458 #endif
 459                 u32 mntr_flags;
 460         } u;
 461
 462 #ifdef CONFIG_MAC80211_DEBUGFS
 463         struct dentry *debugfsdir;
 464         union {
 465                 struct {
 466                         struct dentry *drop_unencrypted;
 467                         struct dentry *state;
 468                         struct dentry *bssid;
 469                         struct dentry *prev_bssid;
 470                         struct dentry *ssid_len;
 471                         struct dentry *aid;
 472                         struct dentry *ap_capab;
 473                         struct dentry *capab;
 474                         struct dentry *extra_ie_len;
 475                         struct dentry *auth_tries;
 476                         struct dentry *assoc_tries;
 477                         struct dentry *auth_algs;
 478                         struct dentry *auth_alg;
 479                         struct dentry *auth_transaction;
 480                         struct dentry *flags;
 481                         struct dentry *num_beacons_sta;
 482                         struct dentry *force_unicast_rateidx;
 483                         struct dentry *max_ratectrl_rateidx;
 484                 } sta;
 485                 struct {
 486                         struct dentry *drop_unencrypted;
 487                         struct dentry *num_sta_ps;
 488                         struct dentry *dtim_count;
 489                         struct dentry *num_beacons;
 490                         struct dentry *force_unicast_rateidx;
 491                         struct dentry *max_ratectrl_rateidx;
 492                         struct dentry *num_buffered_multicast;
 493                 } ap;
 494                 struct {
 495                         struct dentry *drop_unencrypted;
 496                         struct dentry *peer;
 497                         struct dentry *force_unicast_rateidx;
 498                         struct dentry *max_ratectrl_rateidx;
 499                 } wds;
 500                 struct {
 501                         struct dentry *drop_unencrypted;
 502                         struct dentry *force_unicast_rateidx;
 503                         struct dentry *max_ratectrl_rateidx;
 504                 } vlan;
 505                 struct {
 506                         struct dentry *mode;
 507                 } monitor;
 508         } debugfs;
 509         struct {
 510                 struct dentry *default_key;
 511         } common_debugfs;
 512
 513 #ifdef CONFIG_MAC80211_MESH
 514         struct dentry *mesh_stats_dir;
 515         struct {
 516                 struct dentry *fwded_frames;
 517                 struct dentry *dropped_frames_ttl;
 518                 struct dentry *dropped_frames_no_route;
 519                 struct dentry *estab_plinks;
 520                 struct timer_list mesh_path_timer;
 521         } mesh_stats;
 522
 523         struct dentry *mesh_config_dir;
 524         struct {
 525                 struct dentry *dot11MeshRetryTimeout;
 526                 struct dentry *dot11MeshConfirmTimeout;
 527                 struct dentry *dot11MeshHoldingTimeout;
 528                 struct dentry *dot11MeshMaxRetries;
 529                 struct dentry *dot11MeshTTL;
 530                 struct dentry *auto_open_plinks;
 531                 struct dentry *dot11MeshMaxPeerLinks;
 532                 struct dentry *dot11MeshHWMPactivePathTimeout;
 533                 struct dentry *dot11MeshHWMPpreqMinInterval;
 534                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 535                 struct dentry *dot11MeshHWMPmaxPREQretries;
 536                 struct dentry *path_refresh_time;
 537                 struct dentry *min_discovery_timeout;
 538         } mesh_config;
 539 #endif
 540
 541 #endif
 542         /* must be last, dynamically sized area in this! */
 543         struct ieee80211_vif vif;
 544 };
 545
 546 static inline
 547 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 548 {
 549         return container_of(p, struct ieee80211_sub_if_data, vif);
 550 }
 551
 552 static inline void
 553 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 554                             u8 mesh_id_len, u8 *mesh_id)
 555 {
 556 #ifdef CONFIG_MAC80211_MESH
 557         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 558         ifmsh->mesh_id_len = mesh_id_len;
 559         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 560 #else
 561         WARN_ON(1);
 562 #endif
 563 }
 564
 565 enum {
 566         IEEE80211_RX_MSG        = 1,
 567         IEEE80211_TX_STATUS_MSG = 2,
 568         IEEE80211_DELBA_MSG     = 3,
 569         IEEE80211_ADDBA_MSG     = 4,
 570 };
 571
 572 /* maximum number of hardware queues we support. */
 573 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 574
 575 struct ieee80211_local {
 576         /* embed the driver visible part.
 577          * don't cast (use the static inlines below), but we keep
 578          * it first anyway so they become a no-op */
 579         struct ieee80211_hw hw;
 580
 581         const struct ieee80211_ops *ops;
 582
 583         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 584
 585         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 586         int open_count;
 587         int monitors, cooked_mntrs;
 588         /* number of interfaces with corresponding FIF_ flags */
 589         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 590         unsigned int filter_flags; /* FIF_* */
 591         struct iw_statistics wstats;
 592         u8 wstats_flags;
 593         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 594         int tx_headroom; /* required headroom for hardware/radiotap */
 595
 596         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 597          * added to skb_queue will be processed, but frames in
 598          * skb_queue_unreliable may be dropped if the total length of these
 599          * queues increases over the limit. */
 600 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 601         struct tasklet_struct tasklet;
 602         struct sk_buff_head skb_queue;
 603         struct sk_buff_head skb_queue_unreliable;
 604
 605         /* Station data */
 606         /*
 607          * The lock only protects the list, hash, timer and counter
 608          * against manipulation, reads are done in RCU. Additionally,
 609          * the lock protects each BSS's TIM bitmap.
 610          */
 611         spinlock_t sta_lock;
 612         unsigned long num_sta;
 613         struct list_head sta_list;
 614         struct list_head sta_flush_list;
 615         struct work_struct sta_flush_work;
 616         struct sta_info *sta_hash[STA_HASH_SIZE];
 617         struct timer_list sta_cleanup;
 618
 619         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 620         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 621         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 622         struct tasklet_struct tx_pending_tasklet;
 623
 624         /* number of interfaces with corresponding IFF_ flags */
 625         atomic_t iff_allmultis, iff_promiscs;
 626
 627         struct rate_control_ref *rate_ctrl;
 628
 629         int rts_threshold;
 630         int fragmentation_threshold;
 631         int short_retry_limit; /* dot11ShortRetryLimit */
 632         int long_retry_limit; /* dot11LongRetryLimit */
 633
 634         struct crypto_blkcipher *wep_tx_tfm;
 635         struct crypto_blkcipher *wep_rx_tfm;
 636         u32 wep_iv;
 637
 638         int bridge_packets; /* bridge packets between associated stations and
 639                              * deliver multicast frames both back to wireless
 640                              * media and to the local net stack */
 641
 642         struct list_head interfaces;
 643
 644         /*
 645          * Key lock, protects sdata's key_list and sta_info's
 646          * key pointers (write access, they're RCU.)
 647          */
 648         spinlock_t key_lock;
 649
 650
 651         bool sta_sw_scanning;
 652         bool sta_hw_scanning;
 653         int scan_channel_idx;
 654         enum ieee80211_band scan_band;
 655
 656         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 657         unsigned long last_scan_completed;
 658         struct delayed_work scan_work;
 659         struct ieee80211_sub_if_data *scan_sdata;
 660         struct ieee80211_channel *oper_channel, *scan_channel;
 661         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 662         size_t scan_ssid_len;
 663         struct list_head sta_bss_list;
 664         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 665         spinlock_t sta_bss_lock;
 666
 667         /* SNMP counters */
 668         /* dot11CountersTable */
 669         u32 dot11TransmittedFragmentCount;
 670         u32 dot11MulticastTransmittedFrameCount;
 671         u32 dot11FailedCount;
 672         u32 dot11RetryCount;
 673         u32 dot11MultipleRetryCount;
 674         u32 dot11FrameDuplicateCount;
 675         u32 dot11ReceivedFragmentCount;
 676         u32 dot11MulticastReceivedFrameCount;
 677         u32 dot11TransmittedFrameCount;
 678         u32 dot11WEPUndecryptableCount;
 679
 680 #ifdef CONFIG_MAC80211_LEDS
 681         int tx_led_counter, rx_led_counter;
 682         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 683         char tx_led_name[32], rx_led_name[32],
 684              assoc_led_name[32], radio_led_name[32];
 685 #endif
 686
 687 #ifdef CONFIG_MAC80211_DEBUGFS
 688         struct work_struct sta_debugfs_add;
 689 #endif
 690
 691 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 692         /* TX/RX handler statistics */
 693         unsigned int tx_handlers_drop;
 694         unsigned int tx_handlers_queued;
 695         unsigned int tx_handlers_drop_unencrypted;
 696         unsigned int tx_handlers_drop_fragment;
 697         unsigned int tx_handlers_drop_wep;
 698         unsigned int tx_handlers_drop_not_assoc;
 699         unsigned int tx_handlers_drop_unauth_port;
 700         unsigned int rx_handlers_drop;
 701         unsigned int rx_handlers_queued;
 702         unsigned int rx_handlers_drop_nullfunc;
 703         unsigned int rx_handlers_drop_defrag;
 704         unsigned int rx_handlers_drop_short;
 705         unsigned int rx_handlers_drop_passive_scan;
 706         unsigned int tx_expand_skb_head;
 707         unsigned int tx_expand_skb_head_cloned;
 708         unsigned int rx_expand_skb_head;
 709         unsigned int rx_expand_skb_head2;
 710         unsigned int rx_handlers_fragments;
 711         unsigned int tx_status_drop;
 712 #define I802_DEBUG_INC(c) (c)++
 713 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 714 #define I802_DEBUG_INC(c) do { } while (0)
 715 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 716
 717
 718         int total_ps_buffered; /* total number of all buffered unicast and
 719                                 * multicast packets for power saving stations
 720                                 */
 721         int wifi_wme_noack_test;
 722         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 723
 724 #ifdef CONFIG_MAC80211_DEBUGFS
 725         struct local_debugfsdentries {
 726                 struct dentry *frequency;
 727                 struct dentry *antenna_sel_tx;
 728                 struct dentry *antenna_sel_rx;
 729                 struct dentry *bridge_packets;
 730                 struct dentry *rts_threshold;
 731                 struct dentry *fragmentation_threshold;
 732                 struct dentry *short_retry_limit;
 733                 struct dentry *long_retry_limit;
 734                 struct dentry *total_ps_buffered;
 735                 struct dentry *wep_iv;
 736                 struct dentry *statistics;
 737                 struct local_debugfsdentries_statsdentries {
 738                         struct dentry *transmitted_fragment_count;
 739                         struct dentry *multicast_transmitted_frame_count;
 740                         struct dentry *failed_count;
 741                         struct dentry *retry_count;
 742                         struct dentry *multiple_retry_count;
 743                         struct dentry *frame_duplicate_count;
 744                         struct dentry *received_fragment_count;
 745                         struct dentry *multicast_received_frame_count;
 746                         struct dentry *transmitted_frame_count;
 747                         struct dentry *wep_undecryptable_count;
 748                         struct dentry *num_scans;
 749 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 750                         struct dentry *tx_handlers_drop;
 751                         struct dentry *tx_handlers_queued;
 752                         struct dentry *tx_handlers_drop_unencrypted;
 753                         struct dentry *tx_handlers_drop_fragment;
 754                         struct dentry *tx_handlers_drop_wep;
 755                         struct dentry *tx_handlers_drop_not_assoc;
 756                         struct dentry *tx_handlers_drop_unauth_port;
 757                         struct dentry *rx_handlers_drop;
 758                         struct dentry *rx_handlers_queued;
 759                         struct dentry *rx_handlers_drop_nullfunc;
 760                         struct dentry *rx_handlers_drop_defrag;
 761                         struct dentry *rx_handlers_drop_short;
 762                         struct dentry *rx_handlers_drop_passive_scan;
 763                         struct dentry *tx_expand_skb_head;
 764                         struct dentry *tx_expand_skb_head_cloned;
 765                         struct dentry *rx_expand_skb_head;
 766                         struct dentry *rx_expand_skb_head2;
 767                         struct dentry *rx_handlers_fragments;
 768                         struct dentry *tx_status_drop;
 769 #endif
 770                         struct dentry *dot11ACKFailureCount;
 771                         struct dentry *dot11RTSFailureCount;
 772                         struct dentry *dot11FCSErrorCount;
 773                         struct dentry *dot11RTSSuccessCount;
 774                 } stats;
 775                 struct dentry *stations;
 776                 struct dentry *keys;
 777         } debugfs;
 778 #endif
 779 };
 780
 781 static inline struct ieee80211_sub_if_data *
 782 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 783 {
 784         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 785
 786         BUG_ON(!local || local->mdev == dev);
 787
 788         return netdev_priv(dev);
 789 }
 790
 791 /* this struct represents 802.11n's RA/TID combination */
 792 struct ieee80211_ra_tid {
 793         u8 ra[ETH_ALEN];
 794         u16 tid;
 795 };
 796
 797 /* Parsed Information Elements */
 798 struct ieee802_11_elems {
 799         u8 *ie_start;
 800         size_t total_len;
 801
 802         /* pointers to IEs */
 803         u8 *ssid;
 804         u8 *supp_rates;
 805         u8 *fh_params;
 806         u8 *ds_params;
 807         u8 *cf_params;
 808         u8 *tim;
 809         u8 *ibss_params;
 810         u8 *challenge;
 811         u8 *wpa;
 812         u8 *rsn;
 813         u8 *erp_info;
 814         u8 *ext_supp_rates;
 815         u8 *wmm_info;
 816         u8 *wmm_param;
 817         u8 *ht_cap_elem;
 818         u8 *ht_info_elem;
 819         u8 *mesh_config;
 820         u8 *mesh_id;
 821         u8 *peer_link;
 822         u8 *preq;
 823         u8 *prep;
 824         u8 *perr;
 825         u8 *ch_switch_elem;
 826         u8 *country_elem;
 827         u8 *pwr_constr_elem;
 828         u8 *quiet_elem;         /* first quite element */
 829
 830         /* length of them, respectively */
 831         u8 ssid_len;
 832         u8 supp_rates_len;
 833         u8 fh_params_len;
 834         u8 ds_params_len;
 835         u8 cf_params_len;
 836         u8 tim_len;
 837         u8 ibss_params_len;
 838         u8 challenge_len;
 839         u8 wpa_len;
 840         u8 rsn_len;
 841         u8 erp_info_len;
 842         u8 ext_supp_rates_len;
 843         u8 wmm_info_len;
 844         u8 wmm_param_len;
 845         u8 ht_cap_elem_len;
 846         u8 ht_info_elem_len;
 847         u8 mesh_config_len;
 848         u8 mesh_id_len;
 849         u8 peer_link_len;
 850         u8 preq_len;
 851         u8 prep_len;
 852         u8 perr_len;
 853         u8 ch_switch_elem_len;
 854         u8 country_elem_len;
 855         u8 pwr_constr_elem_len;
 856         u8 quiet_elem_len;
 857         u8 num_of_quiet_elem;   /* can be more the one */
 858 };
 859
 860 static inline struct ieee80211_local *hw_to_local(
 861         struct ieee80211_hw *hw)
 862 {
 863         return container_of(hw, struct ieee80211_local, hw);
 864 }
 865
 866 static inline struct ieee80211_hw *local_to_hw(
 867         struct ieee80211_local *local)
 868 {
 869         return &local->hw;
 870 }
 871
 872 struct sta_attribute {
 873         struct attribute attr;
 874         ssize_t (*show)(const struct sta_info *, char *buf);
 875         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 876 };
 877
 878 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 879 {
 880         return compare_ether_addr(raddr, addr) == 0 ||
 881                is_broadcast_ether_addr(raddr);
 882 }
 883
 884
 885 int ieee80211_hw_config(struct ieee80211_local *local);
 886 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 887 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 888 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 889                         struct ieee80211_ht_info *req_ht_cap,
 890                         struct ieee80211_ht_bss_info *req_bss_cap);
 891 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 892                                       u32 changed);
 893
 894 /* wireless extensions */
 895 extern const struct iw_handler_def ieee80211_iw_handler_def;
 896
 897 /* STA/IBSS code */
 898 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 899 void ieee80211_sta_scan_work(struct work_struct *work);
 900 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 901                            struct ieee80211_rx_status *rx_status);
 902 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 903 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 904 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 905 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 906                             struct ieee80211_if_sta *ifsta);
 907 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 908                                         struct sk_buff *skb, u8 *bssid,
 909                                         u8 *addr, u64 supp_rates);
 910 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 911 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 912 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 913 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 914                             struct ieee802_11_elems *elems,
 915                             enum ieee80211_band band);
 916 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 917                               u8 *ssid, size_t ssid_len);
 918
 919 /* scan/BSS handling */
 920 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len);
 921 int ieee80211_sta_scan_results(struct ieee80211_local *local,
 922                                struct iw_request_info *info,
 923                                char *buf, size_t len);
 924 ieee80211_rx_result ieee80211_sta_rx_scan(
 925         struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 926         struct ieee80211_rx_status *rx_status);
 927 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 928 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 929 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len);
 930
 931 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 932 int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 933                              u8 *ssid, size_t ssid_len);
 934 struct ieee80211_sta_bss *
 935 ieee80211_bss_info_update(struct ieee80211_local *local,
 936                           struct ieee80211_rx_status *rx_status,
 937                           struct ieee80211_mgmt *mgmt,
 938                           size_t len,
 939                           struct ieee802_11_elems *elems,
 940                           int freq, bool beacon);
 941 struct ieee80211_sta_bss *
 942 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
 943                      u8 *ssid, u8 ssid_len);
 944 struct ieee80211_sta_bss *
 945 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 946                      u8 *ssid, u8 ssid_len);
 947 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 948                           struct ieee80211_sta_bss *bss);
 949
 950 /* interface handling */
 951 void ieee80211_if_setup(struct net_device *dev);
 952 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 953                      struct net_device **new_dev, enum ieee80211_if_types type,
 954                      struct vif_params *params);
 955 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 956                              enum ieee80211_if_types type);
 957 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 958 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 959
 960 /* tx handling */
 961 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 962 void ieee80211_tx_pending(unsigned long data);
 963 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 964 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 965 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 966
 967 /* HT */
 968 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 969                                    struct ieee80211_ht_info *ht_info);
 970 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 971                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 972                         struct ieee80211_ht_bss_info *bss_info);
 973 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 974
 975 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 976                                 u16 tid, u16 initiator, u16 reason);
 977 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 978 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 979                              struct sta_info *sta,
 980                              struct ieee80211_mgmt *mgmt, size_t len);
 981 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 982                                   struct sta_info *sta,
 983                                   struct ieee80211_mgmt *mgmt,
 984                                   size_t len);
 985 void ieee80211_process_addba_request(struct ieee80211_local *local,
 986                                      struct sta_info *sta,
 987                                      struct ieee80211_mgmt *mgmt,
 988                                      size_t len);
 989
 990 /* Spectrum management */
 991 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
 992                                        struct ieee80211_mgmt *mgmt,
 993                                        size_t len);
 994
 995 /* utility functions/constants */
 996 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 997 extern const unsigned char rfc1042_header[6];
 998 extern const unsigned char bridge_tunnel_header[6];
 999 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1000                         enum ieee80211_if_types type);
1001 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1002                              int rate, int erp, int short_preamble);
1003 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1004                                      struct ieee80211_hdr *hdr);
1005 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1006 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1007                       int encrypt);
1008 void ieee802_11_parse_elems(u8 *start, size_t len,
1009                             struct ieee802_11_elems *elems);
1010 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1011
1012 #ifdef CONFIG_MAC80211_NOINLINE
1013 #define debug_noinline noinline
1014 #else
1015 #define debug_noinline
1016 #endif
1017
1018 #endif /* IEEE80211_I_H */