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 "key.h"
  28 #include "sta_info.h"
  29
  30 /* ieee80211.o internal definitions, etc. These are not included into
  31  * low-level drivers. */
  32
  33 #ifndef ETH_P_PAE
  34 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
  35 #endif /* ETH_P_PAE */
  36
  37 #define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
  38
  39 #define IEEE80211_FC(type, subtype) cpu_to_le16(type | subtype)
  40
  41 struct ieee80211_local;
  42
  43 /* Maximum number of broadcast/multicast frames to buffer when some of the
  44  * associated stations are using power saving. */
  45 #define AP_MAX_BC_BUFFER 128
  46
  47 /* Maximum number of frames buffered to all STAs, including multicast frames.
  48  * Note: increasing this limit increases the potential memory requirement. Each
  49  * frame can be up to about 2 kB long. */
  50 #define TOTAL_MAX_TX_BUFFER 512
  51
  52 /* Required encryption head and tailroom */
  53 #define IEEE80211_ENCRYPT_HEADROOM 8
  54 #define IEEE80211_ENCRYPT_TAILROOM 12
  55
  56 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  57  * reception of at least three fragmented frames. This limit can be increased
  58  * by changing this define, at the cost of slower frame reassembly and
  59  * increased memory use (about 2 kB of RAM per entry). */
  60 #define IEEE80211_FRAGMENT_MAX 4
  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         u16 capability; /* host byte order */
  84         enum ieee80211_band band;
  85         int freq;
  86         int signal, noise, qual;
  87         u8 *wpa_ie;
  88         size_t wpa_ie_len;
  89         u8 *rsn_ie;
  90         size_t rsn_ie_len;
  91         u8 *wmm_ie;
  92         size_t wmm_ie_len;
  93         u8 *ht_ie;
  94         size_t ht_ie_len;
  95 #ifdef CONFIG_MAC80211_MESH
  96         u8 *mesh_id;
  97         size_t mesh_id_len;
  98         u8 *mesh_cfg;
  99 #endif
 100 #define IEEE80211_MAX_SUPP_RATES 32
 101         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 102         size_t supp_rates_len;
 103         u64 timestamp;
 104         int beacon_int;
 105
 106         bool probe_resp;
 107         unsigned long last_update;
 108
 109         /* during assocation, we save an ERP value from a probe response so
 110          * that we can feed ERP info to the driver when handling the
 111          * association completes. these fields probably won't be up-to-date
 112          * otherwise, you probably don't want to use them. */
 113         int has_erp_value;
 114         u8 erp_value;
 115 };
 116
 117 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 118 {
 119 #ifdef CONFIG_MAC80211_MESH
 120         return bss->mesh_cfg;
 121 #endif
 122         return NULL;
 123 }
 124
 125 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 126 {
 127 #ifdef CONFIG_MAC80211_MESH
 128         return bss->mesh_id;
 129 #endif
 130         return NULL;
 131 }
 132
 133 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 134 {
 135 #ifdef CONFIG_MAC80211_MESH
 136         return bss->mesh_id_len;
 137 #endif
 138         return 0;
 139 }
 140
 141
 142 typedef unsigned __bitwise__ ieee80211_tx_result;
 143 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 144 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 145 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 146
 147 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 148 #define IEEE80211_TX_UNICAST            BIT(1)
 149 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 150 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 151
 152 struct ieee80211_tx_data {
 153         struct sk_buff *skb;
 154         struct net_device *dev;
 155         struct ieee80211_local *local;
 156         struct ieee80211_sub_if_data *sdata;
 157         struct sta_info *sta;
 158         struct ieee80211_key *key;
 159
 160         struct ieee80211_channel *channel;
 161         s8 rate_idx;
 162         /* use this rate (if set) for last fragment; rate can
 163          * be set to lower rate for the first fragments, e.g.,
 164          * when using CTS protection with IEEE 802.11g. */
 165         s8 last_frag_rate_idx;
 166
 167         /* Extra fragments (in addition to the first fragment
 168          * in skb) */
 169         struct sk_buff **extra_frag;
 170         int num_extra_frag;
 171
 172         u16 fc, ethertype;
 173         unsigned int flags;
 174 };
 175
 176
 177 typedef unsigned __bitwise__ ieee80211_rx_result;
 178 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 179 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 180 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 181 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 182
 183 #define IEEE80211_RX_IN_SCAN            BIT(0)
 184 /* frame is destined to interface currently processed (incl. multicast frames) */
 185 #define IEEE80211_RX_RA_MATCH           BIT(1)
 186 #define IEEE80211_RX_AMSDU              BIT(2)
 187 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 188 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 189
 190 struct ieee80211_rx_data {
 191         struct sk_buff *skb;
 192         struct net_device *dev;
 193         struct ieee80211_local *local;
 194         struct ieee80211_sub_if_data *sdata;
 195         struct sta_info *sta;
 196         struct ieee80211_key *key;
 197         struct ieee80211_rx_status *status;
 198         struct ieee80211_rate *rate;
 199
 200         u16 fc, ethertype;
 201         unsigned int flags;
 202         int sent_ps_buffered;
 203         int queue;
 204         int load;
 205         u32 tkip_iv32;
 206         u16 tkip_iv16;
 207 };
 208
 209 struct ieee80211_tx_stored_packet {
 210         struct sk_buff *skb;
 211         struct sk_buff **extra_frag;
 212         s8 last_frag_rate_idx;
 213         int num_extra_frag;
 214         bool last_frag_rate_ctrl_probe;
 215 };
 216
 217 struct beacon_data {
 218         u8 *head, *tail;
 219         int head_len, tail_len;
 220         int dtim_period;
 221 };
 222
 223 struct ieee80211_if_ap {
 224         struct beacon_data *beacon;
 225
 226         struct list_head vlans;
 227
 228         u8 ssid[IEEE80211_MAX_SSID_LEN];
 229         size_t ssid_len;
 230
 231         /* yes, this looks ugly, but guarantees that we can later use
 232          * bitmap_empty :)
 233          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 234         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 235         struct sk_buff_head ps_bc_buf;
 236         atomic_t num_sta_ps; /* number of stations in PS mode */
 237         int dtim_count;
 238         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 239         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 240         int num_beacons; /* number of TXed beacon frames for this BSS */
 241 };
 242
 243 struct ieee80211_if_wds {
 244         struct sta_info *sta;
 245         u8 remote_addr[ETH_ALEN];
 246 };
 247
 248 struct ieee80211_if_vlan {
 249         struct ieee80211_sub_if_data *ap;
 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         u16 sequence;
 424
 425         /* Fragment table for host-based reassembly */
 426         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 427         unsigned int fragment_next;
 428
 429 #define NUM_DEFAULT_KEYS 4
 430         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 431         struct ieee80211_key *default_key;
 432
 433         /*
 434          * BSS configuration for this interface.
 435          *
 436          * FIXME: I feel bad putting this here when we already have a
 437          *        bss pointer, but the bss pointer is just wrong when
 438          *        you have multiple virtual STA mode interfaces...
 439          *        This needs to be fixed.
 440          */
 441         struct ieee80211_bss_conf bss_conf;
 442         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 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         int channel_use;
 452         int channel_use_raw;
 453
 454 #ifdef CONFIG_MAC80211_DEBUGFS
 455         struct dentry *debugfsdir;
 456         union {
 457                 struct {
 458                         struct dentry *channel_use;
 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 *channel_use;
 478                         struct dentry *drop_unencrypted;
 479                         struct dentry *num_sta_ps;
 480                         struct dentry *dtim_count;
 481                         struct dentry *num_beacons;
 482                         struct dentry *force_unicast_rateidx;
 483                         struct dentry *max_ratectrl_rateidx;
 484                         struct dentry *num_buffered_multicast;
 485                 } ap;
 486                 struct {
 487                         struct dentry *channel_use;
 488                         struct dentry *drop_unencrypted;
 489                         struct dentry *peer;
 490                 } wds;
 491                 struct {
 492                         struct dentry *channel_use;
 493                         struct dentry *drop_unencrypted;
 494                 } vlan;
 495                 struct {
 496                         struct dentry *mode;
 497                 } monitor;
 498                 struct dentry *default_key;
 499         } debugfs;
 500
 501 #ifdef CONFIG_MAC80211_MESH
 502         struct dentry *mesh_stats_dir;
 503         struct {
 504                 struct dentry *fwded_frames;
 505                 struct dentry *dropped_frames_ttl;
 506                 struct dentry *dropped_frames_no_route;
 507                 struct dentry *estab_plinks;
 508                 struct timer_list mesh_path_timer;
 509         } mesh_stats;
 510
 511         struct dentry *mesh_config_dir;
 512         struct {
 513                 struct dentry *dot11MeshRetryTimeout;
 514                 struct dentry *dot11MeshConfirmTimeout;
 515                 struct dentry *dot11MeshHoldingTimeout;
 516                 struct dentry *dot11MeshMaxRetries;
 517                 struct dentry *dot11MeshTTL;
 518                 struct dentry *auto_open_plinks;
 519                 struct dentry *dot11MeshMaxPeerLinks;
 520                 struct dentry *dot11MeshHWMPactivePathTimeout;
 521                 struct dentry *dot11MeshHWMPpreqMinInterval;
 522                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 523                 struct dentry *dot11MeshHWMPmaxPREQretries;
 524                 struct dentry *path_refresh_time;
 525                 struct dentry *min_discovery_timeout;
 526         } mesh_config;
 527 #endif
 528
 529 #endif
 530         /* must be last, dynamically sized area in this! */
 531         struct ieee80211_vif vif;
 532 };
 533
 534 static inline
 535 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 536 {
 537         return container_of(p, struct ieee80211_sub_if_data, vif);
 538 }
 539
 540 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 541
 542 enum {
 543         IEEE80211_RX_MSG        = 1,
 544         IEEE80211_TX_STATUS_MSG = 2,
 545         IEEE80211_DELBA_MSG     = 3,
 546         IEEE80211_ADDBA_MSG     = 4,
 547 };
 548
 549 struct ieee80211_local {
 550         /* embed the driver visible part.
 551          * don't cast (use the static inlines below), but we keep
 552          * it first anyway so they become a no-op */
 553         struct ieee80211_hw hw;
 554
 555         const struct ieee80211_ops *ops;
 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         enum {
 569                 IEEE80211_DEV_UNINITIALIZED = 0,
 570                 IEEE80211_DEV_REGISTERED,
 571                 IEEE80211_DEV_UNREGISTERED,
 572         } reg_state;
 573
 574         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 575          * added to skb_queue will be processed, but frames in
 576          * skb_queue_unreliable may be dropped if the total length of these
 577          * queues increases over the limit. */
 578 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 579         struct tasklet_struct tasklet;
 580         struct sk_buff_head skb_queue;
 581         struct sk_buff_head skb_queue_unreliable;
 582
 583         /* Station data */
 584         /*
 585          * The lock only protects the list, hash, timer and counter
 586          * against manipulation, reads are done in RCU. Additionally,
 587          * the lock protects each BSS's TIM bitmap.
 588          */
 589         spinlock_t sta_lock;
 590         unsigned long num_sta;
 591         struct list_head sta_list;
 592         struct list_head sta_flush_list;
 593         struct work_struct sta_flush_work;
 594         struct sta_info *sta_hash[STA_HASH_SIZE];
 595         struct timer_list sta_cleanup;
 596
 597         unsigned long state[IEEE80211_MAX_QUEUES + IEEE80211_MAX_AMPDU_QUEUES];
 598         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 599         struct tasklet_struct tx_pending_tasklet;
 600
 601         /* number of interfaces with corresponding IFF_ flags */
 602         atomic_t iff_allmultis, iff_promiscs;
 603
 604         struct rate_control_ref *rate_ctrl;
 605
 606         int rts_threshold;
 607         int fragmentation_threshold;
 608         int short_retry_limit; /* dot11ShortRetryLimit */
 609         int long_retry_limit; /* dot11LongRetryLimit */
 610
 611         struct crypto_blkcipher *wep_tx_tfm;
 612         struct crypto_blkcipher *wep_rx_tfm;
 613         u32 wep_iv;
 614
 615         int bridge_packets; /* bridge packets between associated stations and
 616                              * deliver multicast frames both back to wireless
 617                              * media and to the local net stack */
 618
 619         struct list_head interfaces;
 620
 621         /*
 622          * Key lock, protects sdata's key_list and sta_info's
 623          * key pointers (write access, they're RCU.)
 624          */
 625         spinlock_t key_lock;
 626
 627
 628         bool sta_sw_scanning;
 629         bool sta_hw_scanning;
 630         int scan_channel_idx;
 631         enum ieee80211_band scan_band;
 632
 633         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 634         unsigned long last_scan_completed;
 635         struct delayed_work scan_work;
 636         struct net_device *scan_dev;
 637         struct ieee80211_channel *oper_channel, *scan_channel;
 638         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 639         size_t scan_ssid_len;
 640         struct list_head sta_bss_list;
 641         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 642         spinlock_t sta_bss_lock;
 643
 644         /* SNMP counters */
 645         /* dot11CountersTable */
 646         u32 dot11TransmittedFragmentCount;
 647         u32 dot11MulticastTransmittedFrameCount;
 648         u32 dot11FailedCount;
 649         u32 dot11RetryCount;
 650         u32 dot11MultipleRetryCount;
 651         u32 dot11FrameDuplicateCount;
 652         u32 dot11ReceivedFragmentCount;
 653         u32 dot11MulticastReceivedFrameCount;
 654         u32 dot11TransmittedFrameCount;
 655         u32 dot11WEPUndecryptableCount;
 656
 657 #ifdef CONFIG_MAC80211_LEDS
 658         int tx_led_counter, rx_led_counter;
 659         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 660         char tx_led_name[32], rx_led_name[32],
 661              assoc_led_name[32], radio_led_name[32];
 662 #endif
 663
 664         u32 channel_use;
 665         u32 channel_use_raw;
 666
 667 #ifdef CONFIG_MAC80211_DEBUGFS
 668         struct work_struct sta_debugfs_add;
 669 #endif
 670
 671 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 672         /* TX/RX handler statistics */
 673         unsigned int tx_handlers_drop;
 674         unsigned int tx_handlers_queued;
 675         unsigned int tx_handlers_drop_unencrypted;
 676         unsigned int tx_handlers_drop_fragment;
 677         unsigned int tx_handlers_drop_wep;
 678         unsigned int tx_handlers_drop_not_assoc;
 679         unsigned int tx_handlers_drop_unauth_port;
 680         unsigned int rx_handlers_drop;
 681         unsigned int rx_handlers_queued;
 682         unsigned int rx_handlers_drop_nullfunc;
 683         unsigned int rx_handlers_drop_defrag;
 684         unsigned int rx_handlers_drop_short;
 685         unsigned int rx_handlers_drop_passive_scan;
 686         unsigned int tx_expand_skb_head;
 687         unsigned int tx_expand_skb_head_cloned;
 688         unsigned int rx_expand_skb_head;
 689         unsigned int rx_expand_skb_head2;
 690         unsigned int rx_handlers_fragments;
 691         unsigned int tx_status_drop;
 692 #define I802_DEBUG_INC(c) (c)++
 693 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 694 #define I802_DEBUG_INC(c) do { } while (0)
 695 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 696
 697
 698         int total_ps_buffered; /* total number of all buffered unicast and
 699                                 * multicast packets for power saving stations
 700                                 */
 701         int wifi_wme_noack_test;
 702         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 703
 704 #ifdef CONFIG_MAC80211_DEBUGFS
 705         struct local_debugfsdentries {
 706                 struct dentry *frequency;
 707                 struct dentry *antenna_sel_tx;
 708                 struct dentry *antenna_sel_rx;
 709                 struct dentry *bridge_packets;
 710                 struct dentry *rts_threshold;
 711                 struct dentry *fragmentation_threshold;
 712                 struct dentry *short_retry_limit;
 713                 struct dentry *long_retry_limit;
 714                 struct dentry *total_ps_buffered;
 715                 struct dentry *wep_iv;
 716                 struct dentry *statistics;
 717                 struct local_debugfsdentries_statsdentries {
 718                         struct dentry *transmitted_fragment_count;
 719                         struct dentry *multicast_transmitted_frame_count;
 720                         struct dentry *failed_count;
 721                         struct dentry *retry_count;
 722                         struct dentry *multiple_retry_count;
 723                         struct dentry *frame_duplicate_count;
 724                         struct dentry *received_fragment_count;
 725                         struct dentry *multicast_received_frame_count;
 726                         struct dentry *transmitted_frame_count;
 727                         struct dentry *wep_undecryptable_count;
 728                         struct dentry *num_scans;
 729 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 730                         struct dentry *tx_handlers_drop;
 731                         struct dentry *tx_handlers_queued;
 732                         struct dentry *tx_handlers_drop_unencrypted;
 733                         struct dentry *tx_handlers_drop_fragment;
 734                         struct dentry *tx_handlers_drop_wep;
 735                         struct dentry *tx_handlers_drop_not_assoc;
 736                         struct dentry *tx_handlers_drop_unauth_port;
 737                         struct dentry *rx_handlers_drop;
 738                         struct dentry *rx_handlers_queued;
 739                         struct dentry *rx_handlers_drop_nullfunc;
 740                         struct dentry *rx_handlers_drop_defrag;
 741                         struct dentry *rx_handlers_drop_short;
 742                         struct dentry *rx_handlers_drop_passive_scan;
 743                         struct dentry *tx_expand_skb_head;
 744                         struct dentry *tx_expand_skb_head_cloned;
 745                         struct dentry *rx_expand_skb_head;
 746                         struct dentry *rx_expand_skb_head2;
 747                         struct dentry *rx_handlers_fragments;
 748                         struct dentry *tx_status_drop;
 749 #endif
 750                         struct dentry *dot11ACKFailureCount;
 751                         struct dentry *dot11RTSFailureCount;
 752                         struct dentry *dot11FCSErrorCount;
 753                         struct dentry *dot11RTSSuccessCount;
 754                 } stats;
 755                 struct dentry *stations;
 756                 struct dentry *keys;
 757         } debugfs;
 758 #endif
 759 };
 760
 761 /* this struct represents 802.11n's RA/TID combination */
 762 struct ieee80211_ra_tid {
 763         u8 ra[ETH_ALEN];
 764         u16 tid;
 765 };
 766
 767 /* Parsed Information Elements */
 768 struct ieee802_11_elems {
 769         /* pointers to IEs */
 770         u8 *ssid;
 771         u8 *supp_rates;
 772         u8 *fh_params;
 773         u8 *ds_params;
 774         u8 *cf_params;
 775         u8 *tim;
 776         u8 *ibss_params;
 777         u8 *challenge;
 778         u8 *wpa;
 779         u8 *rsn;
 780         u8 *erp_info;
 781         u8 *ext_supp_rates;
 782         u8 *wmm_info;
 783         u8 *wmm_param;
 784         u8 *ht_cap_elem;
 785         u8 *ht_info_elem;
 786         u8 *mesh_config;
 787         u8 *mesh_id;
 788         u8 *peer_link;
 789         u8 *preq;
 790         u8 *prep;
 791         u8 *perr;
 792
 793         /* length of them, respectively */
 794         u8 ssid_len;
 795         u8 supp_rates_len;
 796         u8 fh_params_len;
 797         u8 ds_params_len;
 798         u8 cf_params_len;
 799         u8 tim_len;
 800         u8 ibss_params_len;
 801         u8 challenge_len;
 802         u8 wpa_len;
 803         u8 rsn_len;
 804         u8 erp_info_len;
 805         u8 ext_supp_rates_len;
 806         u8 wmm_info_len;
 807         u8 wmm_param_len;
 808         u8 ht_cap_elem_len;
 809         u8 ht_info_elem_len;
 810         u8 mesh_config_len;
 811         u8 mesh_id_len;
 812         u8 peer_link_len;
 813         u8 preq_len;
 814         u8 prep_len;
 815         u8 perr_len;
 816 };
 817
 818 static inline struct ieee80211_local *hw_to_local(
 819         struct ieee80211_hw *hw)
 820 {
 821         return container_of(hw, struct ieee80211_local, hw);
 822 }
 823
 824 static inline struct ieee80211_hw *local_to_hw(
 825         struct ieee80211_local *local)
 826 {
 827         return &local->hw;
 828 }
 829
 830 enum ieee80211_link_state_t {
 831         IEEE80211_LINK_STATE_XOFF = 0,
 832         IEEE80211_LINK_STATE_PENDING,
 833 };
 834
 835 struct sta_attribute {
 836         struct attribute attr;
 837         ssize_t (*show)(const struct sta_info *, char *buf);
 838         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 839 };
 840
 841 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 842 {
 843         return compare_ether_addr(raddr, addr) == 0 ||
 844                is_broadcast_ether_addr(raddr);
 845 }
 846
 847
 848 /* ieee80211.c */
 849 int ieee80211_hw_config(struct ieee80211_local *local);
 850 int ieee80211_if_config(struct net_device *dev);
 851 int ieee80211_if_config_beacon(struct net_device *dev);
 852 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 853 void ieee80211_if_setup(struct net_device *dev);
 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
 861
 862 /* Least common multiple of the used rates (in 100 kbps). This is used to
 863  * calculate rate_inv values for each rate so that only integers are needed. */
 864 #define CHAN_UTIL_RATE_LCM 95040
 865 /* 1 usec is 1/8 * (95040/10) = 1188 */
 866 #define CHAN_UTIL_PER_USEC 1188
 867 /* Amount of bits to shift the result right to scale the total utilization
 868  * to values that will not wrap around 32-bit integers. */
 869 #define CHAN_UTIL_SHIFT 9
 870 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 871  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 872  * raw value with about 23 should give utilization in 10th of a percentage
 873  * (1/1000). However, utilization is only estimated and not all intervals
 874  * between frames etc. are calculated. 18 seems to give numbers that are closer
 875  * to the real maximum. */
 876 #define CHAN_UTIL_PER_10MS 18
 877 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 878 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 879
 880
 881 /* ieee80211_ioctl.c */
 882 int ieee80211_set_freq(struct ieee80211_local *local, int freq);
 883 /* ieee80211_sta.c */
 884 void ieee80211_sta_timer(unsigned long data);
 885 void ieee80211_sta_work(struct work_struct *work);
 886 void ieee80211_sta_scan_work(struct work_struct *work);
 887 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 888                            struct ieee80211_rx_status *rx_status);
 889 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 890 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 891 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 892 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 893 void ieee80211_sta_req_auth(struct net_device *dev,
 894                             struct ieee80211_if_sta *ifsta);
 895 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 896 ieee80211_rx_result ieee80211_sta_rx_scan(
 897         struct net_device *dev, struct sk_buff *skb,
 898         struct ieee80211_rx_status *rx_status);
 899 void ieee80211_rx_bss_list_init(struct net_device *dev);
 900 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 901 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 902 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
 903                                         struct sk_buff *skb, u8 *bssid,
 904                                         u8 *addr);
 905 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 906 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 907 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 908                                       u32 changed);
 909 void ieee80211_reset_erp_info(struct net_device *dev);
 910 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 911                                    struct ieee80211_ht_info *ht_info);
 912 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 913                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 914                         struct ieee80211_ht_bss_info *bss_info);
 915 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
 916                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 917                                   u16 agg_size, u16 timeout);
 918 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
 919                                 u16 initiator, u16 reason_code);
 920
 921 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
 922                                 u16 tid, u16 initiator, u16 reason);
 923 void sta_addba_resp_timer_expired(unsigned long data);
 924 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
 925 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 926                             struct ieee802_11_elems *elems,
 927                             enum ieee80211_band band);
 928 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 929                 int encrypt);
 930 void ieee802_11_parse_elems(u8 *start, size_t len,
 931                                    struct ieee802_11_elems *elems);
 932
 933 #ifdef CONFIG_MAC80211_MESH
 934 void ieee80211_start_mesh(struct net_device *dev);
 935 #else
 936 static inline void ieee80211_start_mesh(struct net_device *dev)
 937 {}
 938 #endif
 939
 940 /* ieee80211_iface.c */
 941 int ieee80211_if_add(struct net_device *dev, const char *name,
 942                      struct net_device **new_dev, int type,
 943                      struct vif_params *params);
 944 void ieee80211_if_set_type(struct net_device *dev, int type);
 945 void ieee80211_if_reinit(struct net_device *dev);
 946 void __ieee80211_if_del(struct ieee80211_local *local,
 947                         struct ieee80211_sub_if_data *sdata);
 948 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 949 void ieee80211_if_free(struct net_device *dev);
 950 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 951
 952 /* tx handling */
 953 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 954 void ieee80211_tx_pending(unsigned long data);
 955 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 956 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 957 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 958
 959 /* utility functions/constants */
 960 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 961 extern const unsigned char rfc1042_header[6];
 962 extern const unsigned char bridge_tunnel_header[6];
 963 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 964                         enum ieee80211_if_types type);
 965 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 966                              int rate, int erp, int short_preamble);
 967 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 968                                      struct ieee80211_hdr *hdr);
 969
 970 #endif /* IEEE80211_I_H */