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 "key.h"
  29 #include "sta_info.h"
  30
  31 /* ieee80211.o internal definitions, etc. These are not included into
  32  * low-level drivers. */
  33
  34 #ifndef ETH_P_PAE
  35 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
  36 #endif /* ETH_P_PAE */
  37
  38 #define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
  39
  40 #define IEEE80211_FC(type, subtype) cpu_to_le16(type | subtype)
  41
  42 struct ieee80211_local;
  43
  44 /* Maximum number of broadcast/multicast frames to buffer when some of the
  45  * associated stations are using power saving. */
  46 #define AP_MAX_BC_BUFFER 128
  47
  48 /* Maximum number of frames buffered to all STAs, including multicast frames.
  49  * Note: increasing this limit increases the potential memory requirement. Each
  50  * frame can be up to about 2 kB long. */
  51 #define TOTAL_MAX_TX_BUFFER 512
  52
  53 /* Required encryption head and tailroom */
  54 #define IEEE80211_ENCRYPT_HEADROOM 8
  55 #define IEEE80211_ENCRYPT_TAILROOM 12
  56
  57 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  58  * reception of at least three fragmented frames. This limit can be increased
  59  * by changing this define, at the cost of slower frame reassembly and
  60  * increased memory use (about 2 kB of RAM per entry). */
  61 #define IEEE80211_FRAGMENT_MAX 4
  62
  63 struct ieee80211_fragment_entry {
  64         unsigned long first_frag_time;
  65         unsigned int seq;
  66         unsigned int rx_queue;
  67         unsigned int last_frag;
  68         unsigned int extra_len;
  69         struct sk_buff_head skb_list;
  70         int ccmp; /* Whether fragments were encrypted with CCMP */
  71         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  72 };
  73
  74
  75 struct ieee80211_sta_bss {
  76         struct list_head list;
  77         struct ieee80211_sta_bss *hnext;
  78         size_t ssid_len;
  79
  80         atomic_t users;
  81
  82         u8 bssid[ETH_ALEN];
  83         u8 ssid[IEEE80211_MAX_SSID_LEN];
  84         u16 capability; /* host byte order */
  85         enum ieee80211_band band;
  86         int freq;
  87         int signal, noise, qual;
  88         u8 *wpa_ie;
  89         size_t wpa_ie_len;
  90         u8 *rsn_ie;
  91         size_t rsn_ie_len;
  92         u8 *wmm_ie;
  93         size_t wmm_ie_len;
  94         u8 *ht_ie;
  95         size_t ht_ie_len;
  96         u8 *ht_add_ie;
  97         size_t ht_add_ie_len;
  98 #ifdef CONFIG_MAC80211_MESH
  99         u8 *mesh_id;
 100         size_t mesh_id_len;
 101         u8 *mesh_cfg;
 102 #endif
 103 #define IEEE80211_MAX_SUPP_RATES 32
 104         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 105         size_t supp_rates_len;
 106         u64 timestamp;
 107         int beacon_int;
 108
 109         bool probe_resp;
 110         unsigned long last_update;
 111
 112         /* during assocation, we save an ERP value from a probe response so
 113          * that we can feed ERP info to the driver when handling the
 114          * association completes. these fields probably won't be up-to-date
 115          * otherwise, you probably don't want to use them. */
 116         int has_erp_value;
 117         u8 erp_value;
 118 };
 119
 120 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 121 {
 122 #ifdef CONFIG_MAC80211_MESH
 123         return bss->mesh_cfg;
 124 #endif
 125         return NULL;
 126 }
 127
 128 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 129 {
 130 #ifdef CONFIG_MAC80211_MESH
 131         return bss->mesh_id;
 132 #endif
 133         return NULL;
 134 }
 135
 136 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 137 {
 138 #ifdef CONFIG_MAC80211_MESH
 139         return bss->mesh_id_len;
 140 #endif
 141         return 0;
 142 }
 143
 144
 145 typedef unsigned __bitwise__ ieee80211_tx_result;
 146 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 147 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 148 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 149
 150 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 151 #define IEEE80211_TX_UNICAST            BIT(1)
 152 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 153 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 154
 155 struct ieee80211_tx_data {
 156         struct sk_buff *skb;
 157         struct net_device *dev;
 158         struct ieee80211_local *local;
 159         struct ieee80211_sub_if_data *sdata;
 160         struct sta_info *sta;
 161         struct ieee80211_key *key;
 162
 163         struct ieee80211_channel *channel;
 164         s8 rate_idx;
 165         /* use this rate (if set) for last fragment; rate can
 166          * be set to lower rate for the first fragments, e.g.,
 167          * when using CTS protection with IEEE 802.11g. */
 168         s8 last_frag_rate_idx;
 169
 170         /* Extra fragments (in addition to the first fragment
 171          * in skb) */
 172         struct sk_buff **extra_frag;
 173         int num_extra_frag;
 174
 175         u16 fc, ethertype;
 176         unsigned int flags;
 177 };
 178
 179
 180 typedef unsigned __bitwise__ ieee80211_rx_result;
 181 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 182 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 183 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 184 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 185
 186 #define IEEE80211_RX_IN_SCAN            BIT(0)
 187 /* frame is destined to interface currently processed (incl. multicast frames) */
 188 #define IEEE80211_RX_RA_MATCH           BIT(1)
 189 #define IEEE80211_RX_AMSDU              BIT(2)
 190 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 191 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 192
 193 struct ieee80211_rx_data {
 194         struct sk_buff *skb;
 195         struct net_device *dev;
 196         struct ieee80211_local *local;
 197         struct ieee80211_sub_if_data *sdata;
 198         struct sta_info *sta;
 199         struct ieee80211_key *key;
 200         struct ieee80211_rx_status *status;
 201         struct ieee80211_rate *rate;
 202
 203         u16 fc, ethertype;
 204         unsigned int flags;
 205         int sent_ps_buffered;
 206         int queue;
 207         u32 tkip_iv32;
 208         u16 tkip_iv16;
 209 };
 210
 211 struct ieee80211_tx_stored_packet {
 212         struct sk_buff *skb;
 213         struct sk_buff **extra_frag;
 214         s8 last_frag_rate_idx;
 215         int num_extra_frag;
 216         bool last_frag_rate_ctrl_probe;
 217 };
 218
 219 struct beacon_data {
 220         u8 *head, *tail;
 221         int head_len, tail_len;
 222         int dtim_period;
 223 };
 224
 225 struct ieee80211_if_ap {
 226         struct beacon_data *beacon;
 227
 228         struct list_head vlans;
 229
 230         u8 ssid[IEEE80211_MAX_SSID_LEN];
 231         size_t ssid_len;
 232
 233         /* yes, this looks ugly, but guarantees that we can later use
 234          * bitmap_empty :)
 235          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 236         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 237         struct sk_buff_head ps_bc_buf;
 238         atomic_t num_sta_ps; /* number of stations in PS mode */
 239         int dtim_count;
 240         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 241         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 242         int num_beacons; /* number of TXed beacon frames for this BSS */
 243 };
 244
 245 struct ieee80211_if_wds {
 246         struct sta_info *sta;
 247         u8 remote_addr[ETH_ALEN];
 248 };
 249
 250 struct ieee80211_if_vlan {
 251         struct ieee80211_sub_if_data *ap;
 252         struct list_head list;
 253 };
 254
 255 struct mesh_stats {
 256         __u32 fwded_frames;             /* Mesh forwarded frames */
 257         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 258         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 259         atomic_t estab_plinks;
 260 };
 261
 262 #define PREQ_Q_F_START          0x1
 263 #define PREQ_Q_F_REFRESH        0x2
 264 struct mesh_preq_queue {
 265         struct list_head list;
 266         u8 dst[ETH_ALEN];
 267         u8 flags;
 268 };
 269
 270 struct mesh_config {
 271         /* Timeouts in ms */
 272         /* Mesh plink management parameters */
 273         u16 dot11MeshRetryTimeout;
 274         u16 dot11MeshConfirmTimeout;
 275         u16 dot11MeshHoldingTimeout;
 276         u16 dot11MeshMaxPeerLinks;
 277         u8  dot11MeshMaxRetries;
 278         u8  dot11MeshTTL;
 279         bool auto_open_plinks;
 280         /* HWMP parameters */
 281         u8  dot11MeshHWMPmaxPREQretries;
 282         u32 path_refresh_time;
 283         u16 min_discovery_timeout;
 284         u32 dot11MeshHWMPactivePathTimeout;
 285         u16 dot11MeshHWMPpreqMinInterval;
 286         u16 dot11MeshHWMPnetDiameterTraversalTime;
 287 };
 288
 289
 290 /* flags used in struct ieee80211_if_sta.flags */
 291 #define IEEE80211_STA_SSID_SET          BIT(0)
 292 #define IEEE80211_STA_BSSID_SET         BIT(1)
 293 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 294 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 295 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 296 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 297 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 298 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 299 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 300 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 301 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 302 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 303 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 304 struct ieee80211_if_sta {
 305         struct timer_list timer;
 306         struct work_struct work;
 307         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 308         u8 ssid[IEEE80211_MAX_SSID_LEN];
 309         enum {
 310                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 311                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 312                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED,
 313                 IEEE80211_MESH_UP
 314         } state;
 315         size_t ssid_len;
 316         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 317         size_t scan_ssid_len;
 318 #ifdef CONFIG_MAC80211_MESH
 319         struct timer_list mesh_path_timer;
 320         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 321         size_t mesh_id_len;
 322         /* Active Path Selection Protocol Identifier */
 323         u8 mesh_pp_id[4];
 324         /* Active Path Selection Metric Identifier */
 325         u8 mesh_pm_id[4];
 326         /* Congestion Control Mode Identifier */
 327         u8 mesh_cc_id[4];
 328         /* Local mesh Destination Sequence Number */
 329         u32 dsn;
 330         /* Last used PREQ ID */
 331         u32 preq_id;
 332         atomic_t mpaths;
 333         /* Timestamp of last DSN update */
 334         unsigned long last_dsn_update;
 335         /* Timestamp of last DSN sent */
 336         unsigned long last_preq;
 337         struct mesh_rmc *rmc;
 338         spinlock_t mesh_preq_queue_lock;
 339         struct mesh_preq_queue preq_queue;
 340         int preq_queue_len;
 341         struct mesh_stats mshstats;
 342         struct mesh_config mshcfg;
 343         u32 mesh_seqnum;
 344         bool accepting_plinks;
 345 #endif
 346         u16 aid;
 347         u16 ap_capab, capab;
 348         u8 *extra_ie; /* to be added to the end of AssocReq */
 349         size_t extra_ie_len;
 350
 351         /* The last AssocReq/Resp IEs */
 352         u8 *assocreq_ies, *assocresp_ies;
 353         size_t assocreq_ies_len, assocresp_ies_len;
 354
 355         struct sk_buff_head skb_queue;
 356
 357         int auth_tries, assoc_tries;
 358
 359         unsigned long request;
 360
 361         unsigned long last_probe;
 362
 363         unsigned int flags;
 364 #define IEEE80211_STA_REQ_SCAN 0
 365 #define IEEE80211_STA_REQ_AUTH 1
 366 #define IEEE80211_STA_REQ_RUN  2
 367
 368 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 369 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 370 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 371         unsigned int auth_algs; /* bitfield of allowed auth algs */
 372         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 373         int auth_transaction;
 374
 375         unsigned long ibss_join_req;
 376         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 377         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 378
 379         int wmm_last_param_set;
 380         int num_beacons; /* number of TXed beacon frames by this STA */
 381 };
 382
 383 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 384                                                 u8 mesh_id_len, u8 *mesh_id)
 385 {
 386 #ifdef CONFIG_MAC80211_MESH
 387         ifsta->mesh_id_len = mesh_id_len;
 388         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 389 #endif
 390 }
 391
 392 #ifdef CONFIG_MAC80211_MESH
 393 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 394         do { (sta)->mshstats.name++; } while (0)
 395 #else
 396 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 397         do { } while (0)
 398 #endif
 399
 400 /* flags used in struct ieee80211_sub_if_data.flags */
 401 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 402 #define IEEE80211_SDATA_PROMISC         BIT(1)
 403 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 404 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 405 struct ieee80211_sub_if_data {
 406         struct list_head list;
 407
 408         struct wireless_dev wdev;
 409
 410         /* keys */
 411         struct list_head key_list;
 412
 413         struct net_device *dev;
 414         struct ieee80211_local *local;
 415
 416         unsigned int flags;
 417
 418         int drop_unencrypted;
 419
 420         /*
 421          * basic rates of this AP or the AP we're associated to
 422          */
 423         u64 basic_rates;
 424
 425         u16 sequence;
 426
 427         /* Fragment table for host-based reassembly */
 428         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 429         unsigned int fragment_next;
 430
 431 #define NUM_DEFAULT_KEYS 4
 432         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 433         struct ieee80211_key *default_key;
 434
 435         /*
 436          * BSS configuration for this interface.
 437          *
 438          * FIXME: I feel bad putting this here when we already have a
 439          *        bss pointer, but the bss pointer is just wrong when
 440          *        you have multiple virtual STA mode interfaces...
 441          *        This needs to be fixed.
 442          */
 443         struct ieee80211_bss_conf bss_conf;
 444         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 445
 446         union {
 447                 struct ieee80211_if_ap ap;
 448                 struct ieee80211_if_wds wds;
 449                 struct ieee80211_if_vlan vlan;
 450                 struct ieee80211_if_sta sta;
 451                 u32 mntr_flags;
 452         } u;
 453
 454 #ifdef CONFIG_MAC80211_DEBUGFS
 455         struct dentry *debugfsdir;
 456         union {
 457                 struct {
 458                         struct dentry *drop_unencrypted;
 459                         struct dentry *state;
 460                         struct dentry *bssid;
 461                         struct dentry *prev_bssid;
 462                         struct dentry *ssid_len;
 463                         struct dentry *aid;
 464                         struct dentry *ap_capab;
 465                         struct dentry *capab;
 466                         struct dentry *extra_ie_len;
 467                         struct dentry *auth_tries;
 468                         struct dentry *assoc_tries;
 469                         struct dentry *auth_algs;
 470                         struct dentry *auth_alg;
 471                         struct dentry *auth_transaction;
 472                         struct dentry *flags;
 473                         struct dentry *num_beacons_sta;
 474                 } sta;
 475                 struct {
 476                         struct dentry *drop_unencrypted;
 477                         struct dentry *num_sta_ps;
 478                         struct dentry *dtim_count;
 479                         struct dentry *num_beacons;
 480                         struct dentry *force_unicast_rateidx;
 481                         struct dentry *max_ratectrl_rateidx;
 482                         struct dentry *num_buffered_multicast;
 483                 } ap;
 484                 struct {
 485                         struct dentry *drop_unencrypted;
 486                         struct dentry *peer;
 487                 } wds;
 488                 struct {
 489                         struct dentry *drop_unencrypted;
 490                 } vlan;
 491                 struct {
 492                         struct dentry *mode;
 493                 } monitor;
 494                 struct dentry *default_key;
 495         } debugfs;
 496
 497 #ifdef CONFIG_MAC80211_MESH
 498         struct dentry *mesh_stats_dir;
 499         struct {
 500                 struct dentry *fwded_frames;
 501                 struct dentry *dropped_frames_ttl;
 502                 struct dentry *dropped_frames_no_route;
 503                 struct dentry *estab_plinks;
 504                 struct timer_list mesh_path_timer;
 505         } mesh_stats;
 506
 507         struct dentry *mesh_config_dir;
 508         struct {
 509                 struct dentry *dot11MeshRetryTimeout;
 510                 struct dentry *dot11MeshConfirmTimeout;
 511                 struct dentry *dot11MeshHoldingTimeout;
 512                 struct dentry *dot11MeshMaxRetries;
 513                 struct dentry *dot11MeshTTL;
 514                 struct dentry *auto_open_plinks;
 515                 struct dentry *dot11MeshMaxPeerLinks;
 516                 struct dentry *dot11MeshHWMPactivePathTimeout;
 517                 struct dentry *dot11MeshHWMPpreqMinInterval;
 518                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 519                 struct dentry *dot11MeshHWMPmaxPREQretries;
 520                 struct dentry *path_refresh_time;
 521                 struct dentry *min_discovery_timeout;
 522         } mesh_config;
 523 #endif
 524
 525 #endif
 526         /* must be last, dynamically sized area in this! */
 527         struct ieee80211_vif vif;
 528 };
 529
 530 static inline
 531 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 532 {
 533         return container_of(p, struct ieee80211_sub_if_data, vif);
 534 }
 535
 536 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 537
 538 enum {
 539         IEEE80211_RX_MSG        = 1,
 540         IEEE80211_TX_STATUS_MSG = 2,
 541         IEEE80211_DELBA_MSG     = 3,
 542         IEEE80211_ADDBA_MSG     = 4,
 543 };
 544
 545 struct ieee80211_local {
 546         /* embed the driver visible part.
 547          * don't cast (use the static inlines below), but we keep
 548          * it first anyway so they become a no-op */
 549         struct ieee80211_hw hw;
 550
 551         const struct ieee80211_ops *ops;
 552
 553         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 554         int open_count;
 555         int monitors, cooked_mntrs;
 556         /* number of interfaces with corresponding FIF_ flags */
 557         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 558         unsigned int filter_flags; /* FIF_* */
 559         struct iw_statistics wstats;
 560         u8 wstats_flags;
 561         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 562         int tx_headroom; /* required headroom for hardware/radiotap */
 563
 564         enum {
 565                 IEEE80211_DEV_UNINITIALIZED = 0,
 566                 IEEE80211_DEV_REGISTERED,
 567                 IEEE80211_DEV_UNREGISTERED,
 568         } reg_state;
 569
 570         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 571          * added to skb_queue will be processed, but frames in
 572          * skb_queue_unreliable may be dropped if the total length of these
 573          * queues increases over the limit. */
 574 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 575         struct tasklet_struct tasklet;
 576         struct sk_buff_head skb_queue;
 577         struct sk_buff_head skb_queue_unreliable;
 578
 579         /* Station data */
 580         /*
 581          * The lock only protects the list, hash, timer and counter
 582          * against manipulation, reads are done in RCU. Additionally,
 583          * the lock protects each BSS's TIM bitmap.
 584          */
 585         spinlock_t sta_lock;
 586         unsigned long num_sta;
 587         struct list_head sta_list;
 588         struct list_head sta_flush_list;
 589         struct work_struct sta_flush_work;
 590         struct sta_info *sta_hash[STA_HASH_SIZE];
 591         struct timer_list sta_cleanup;
 592
 593         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 594         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 595         struct tasklet_struct tx_pending_tasklet;
 596
 597         /* number of interfaces with corresponding IFF_ flags */
 598         atomic_t iff_allmultis, iff_promiscs;
 599
 600         struct rate_control_ref *rate_ctrl;
 601
 602         int rts_threshold;
 603         int fragmentation_threshold;
 604         int short_retry_limit; /* dot11ShortRetryLimit */
 605         int long_retry_limit; /* dot11LongRetryLimit */
 606
 607         struct crypto_blkcipher *wep_tx_tfm;
 608         struct crypto_blkcipher *wep_rx_tfm;
 609         u32 wep_iv;
 610
 611         int bridge_packets; /* bridge packets between associated stations and
 612                              * deliver multicast frames both back to wireless
 613                              * media and to the local net stack */
 614
 615         struct list_head interfaces;
 616
 617         /*
 618          * Key lock, protects sdata's key_list and sta_info's
 619          * key pointers (write access, they're RCU.)
 620          */
 621         spinlock_t key_lock;
 622
 623
 624         bool sta_sw_scanning;
 625         bool sta_hw_scanning;
 626         int scan_channel_idx;
 627         enum ieee80211_band scan_band;
 628
 629         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 630         unsigned long last_scan_completed;
 631         struct delayed_work scan_work;
 632         struct net_device *scan_dev;
 633         struct ieee80211_channel *oper_channel, *scan_channel;
 634         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 635         size_t scan_ssid_len;
 636         struct list_head sta_bss_list;
 637         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 638         spinlock_t sta_bss_lock;
 639
 640         /* SNMP counters */
 641         /* dot11CountersTable */
 642         u32 dot11TransmittedFragmentCount;
 643         u32 dot11MulticastTransmittedFrameCount;
 644         u32 dot11FailedCount;
 645         u32 dot11RetryCount;
 646         u32 dot11MultipleRetryCount;
 647         u32 dot11FrameDuplicateCount;
 648         u32 dot11ReceivedFragmentCount;
 649         u32 dot11MulticastReceivedFrameCount;
 650         u32 dot11TransmittedFrameCount;
 651         u32 dot11WEPUndecryptableCount;
 652
 653 #ifdef CONFIG_MAC80211_LEDS
 654         int tx_led_counter, rx_led_counter;
 655         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 656         char tx_led_name[32], rx_led_name[32],
 657              assoc_led_name[32], radio_led_name[32];
 658 #endif
 659
 660 #ifdef CONFIG_MAC80211_DEBUGFS
 661         struct work_struct sta_debugfs_add;
 662 #endif
 663
 664 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 665         /* TX/RX handler statistics */
 666         unsigned int tx_handlers_drop;
 667         unsigned int tx_handlers_queued;
 668         unsigned int tx_handlers_drop_unencrypted;
 669         unsigned int tx_handlers_drop_fragment;
 670         unsigned int tx_handlers_drop_wep;
 671         unsigned int tx_handlers_drop_not_assoc;
 672         unsigned int tx_handlers_drop_unauth_port;
 673         unsigned int rx_handlers_drop;
 674         unsigned int rx_handlers_queued;
 675         unsigned int rx_handlers_drop_nullfunc;
 676         unsigned int rx_handlers_drop_defrag;
 677         unsigned int rx_handlers_drop_short;
 678         unsigned int rx_handlers_drop_passive_scan;
 679         unsigned int tx_expand_skb_head;
 680         unsigned int tx_expand_skb_head_cloned;
 681         unsigned int rx_expand_skb_head;
 682         unsigned int rx_expand_skb_head2;
 683         unsigned int rx_handlers_fragments;
 684         unsigned int tx_status_drop;
 685 #define I802_DEBUG_INC(c) (c)++
 686 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 687 #define I802_DEBUG_INC(c) do { } while (0)
 688 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 689
 690
 691         int total_ps_buffered; /* total number of all buffered unicast and
 692                                 * multicast packets for power saving stations
 693                                 */
 694         int wifi_wme_noack_test;
 695         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 696
 697 #ifdef CONFIG_MAC80211_DEBUGFS
 698         struct local_debugfsdentries {
 699                 struct dentry *frequency;
 700                 struct dentry *antenna_sel_tx;
 701                 struct dentry *antenna_sel_rx;
 702                 struct dentry *bridge_packets;
 703                 struct dentry *rts_threshold;
 704                 struct dentry *fragmentation_threshold;
 705                 struct dentry *short_retry_limit;
 706                 struct dentry *long_retry_limit;
 707                 struct dentry *total_ps_buffered;
 708                 struct dentry *wep_iv;
 709                 struct dentry *statistics;
 710                 struct local_debugfsdentries_statsdentries {
 711                         struct dentry *transmitted_fragment_count;
 712                         struct dentry *multicast_transmitted_frame_count;
 713                         struct dentry *failed_count;
 714                         struct dentry *retry_count;
 715                         struct dentry *multiple_retry_count;
 716                         struct dentry *frame_duplicate_count;
 717                         struct dentry *received_fragment_count;
 718                         struct dentry *multicast_received_frame_count;
 719                         struct dentry *transmitted_frame_count;
 720                         struct dentry *wep_undecryptable_count;
 721                         struct dentry *num_scans;
 722 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 723                         struct dentry *tx_handlers_drop;
 724                         struct dentry *tx_handlers_queued;
 725                         struct dentry *tx_handlers_drop_unencrypted;
 726                         struct dentry *tx_handlers_drop_fragment;
 727                         struct dentry *tx_handlers_drop_wep;
 728                         struct dentry *tx_handlers_drop_not_assoc;
 729                         struct dentry *tx_handlers_drop_unauth_port;
 730                         struct dentry *rx_handlers_drop;
 731                         struct dentry *rx_handlers_queued;
 732                         struct dentry *rx_handlers_drop_nullfunc;
 733                         struct dentry *rx_handlers_drop_defrag;
 734                         struct dentry *rx_handlers_drop_short;
 735                         struct dentry *rx_handlers_drop_passive_scan;
 736                         struct dentry *tx_expand_skb_head;
 737                         struct dentry *tx_expand_skb_head_cloned;
 738                         struct dentry *rx_expand_skb_head;
 739                         struct dentry *rx_expand_skb_head2;
 740                         struct dentry *rx_handlers_fragments;
 741                         struct dentry *tx_status_drop;
 742 #endif
 743                         struct dentry *dot11ACKFailureCount;
 744                         struct dentry *dot11RTSFailureCount;
 745                         struct dentry *dot11FCSErrorCount;
 746                         struct dentry *dot11RTSSuccessCount;
 747                 } stats;
 748                 struct dentry *stations;
 749                 struct dentry *keys;
 750         } debugfs;
 751 #endif
 752 };
 753
 754 static inline int ieee80211_is_multiqueue(struct ieee80211_local *local)
 755 {
 756 #ifdef CONFIG_MAC80211_QOS
 757         return netif_is_multiqueue(local->mdev);
 758 #else
 759         return 0;
 760 #endif
 761 }
 762
 763 /* this struct represents 802.11n's RA/TID combination */
 764 struct ieee80211_ra_tid {
 765         u8 ra[ETH_ALEN];
 766         u16 tid;
 767 };
 768
 769 /* Parsed Information Elements */
 770 struct ieee802_11_elems {
 771         /* pointers to IEs */
 772         u8 *ssid;
 773         u8 *supp_rates;
 774         u8 *fh_params;
 775         u8 *ds_params;
 776         u8 *cf_params;
 777         u8 *tim;
 778         u8 *ibss_params;
 779         u8 *challenge;
 780         u8 *wpa;
 781         u8 *rsn;
 782         u8 *erp_info;
 783         u8 *ext_supp_rates;
 784         u8 *wmm_info;
 785         u8 *wmm_param;
 786         u8 *ht_cap_elem;
 787         u8 *ht_info_elem;
 788         u8 *mesh_config;
 789         u8 *mesh_id;
 790         u8 *peer_link;
 791         u8 *preq;
 792         u8 *prep;
 793         u8 *perr;
 794
 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 };
 819
 820 static inline struct ieee80211_local *hw_to_local(
 821         struct ieee80211_hw *hw)
 822 {
 823         return container_of(hw, struct ieee80211_local, hw);
 824 }
 825
 826 static inline struct ieee80211_hw *local_to_hw(
 827         struct ieee80211_local *local)
 828 {
 829         return &local->hw;
 830 }
 831
 832 struct sta_attribute {
 833         struct attribute attr;
 834         ssize_t (*show)(const struct sta_info *, char *buf);
 835         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 836 };
 837
 838 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 839 {
 840         return compare_ether_addr(raddr, addr) == 0 ||
 841                is_broadcast_ether_addr(raddr);
 842 }
 843
 844
 845 /* ieee80211.c */
 846 int ieee80211_hw_config(struct ieee80211_local *local);
 847 int ieee80211_if_config(struct net_device *dev);
 848 int ieee80211_if_config_beacon(struct net_device *dev);
 849 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 850 void ieee80211_if_setup(struct net_device *dev);
 851 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 852                         struct ieee80211_ht_info *req_ht_cap,
 853                         struct ieee80211_ht_bss_info *req_bss_cap);
 854
 855 /* ieee80211_ioctl.c */
 856 extern const struct iw_handler_def ieee80211_iw_handler_def;
 857 int ieee80211_set_freq(struct net_device *dev, int freq);
 858
 859 /* ieee80211_sta.c */
 860 void ieee80211_sta_timer(unsigned long data);
 861 void ieee80211_sta_work(struct work_struct *work);
 862 void ieee80211_sta_scan_work(struct work_struct *work);
 863 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 864                            struct ieee80211_rx_status *rx_status);
 865 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 866 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 867 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 868 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 869 void ieee80211_sta_req_auth(struct net_device *dev,
 870                             struct ieee80211_if_sta *ifsta);
 871 int ieee80211_sta_scan_results(struct net_device *dev,
 872                                struct iw_request_info *info,
 873                                char *buf, size_t len);
 874 ieee80211_rx_result ieee80211_sta_rx_scan(
 875         struct net_device *dev, struct sk_buff *skb,
 876         struct ieee80211_rx_status *rx_status);
 877 void ieee80211_rx_bss_list_init(struct net_device *dev);
 878 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 879 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 880 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
 881                                         struct sk_buff *skb, u8 *bssid,
 882                                         u8 *addr, u64 supp_rates);
 883 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 884 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 885 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 886                                       u32 changed);
 887 void ieee80211_reset_erp_info(struct net_device *dev);
 888 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 889                                    struct ieee80211_ht_info *ht_info);
 890 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 891                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 892                         struct ieee80211_ht_bss_info *bss_info);
 893 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
 894                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 895                                   u16 agg_size, u16 timeout);
 896 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
 897                                 u16 initiator, u16 reason_code);
 898
 899 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
 900                                 u16 tid, u16 initiator, u16 reason);
 901 void sta_addba_resp_timer_expired(unsigned long data);
 902 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
 903 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 904                             struct ieee802_11_elems *elems,
 905                             enum ieee80211_band band);
 906 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 907                 int encrypt);
 908 void ieee802_11_parse_elems(u8 *start, size_t len,
 909                                    struct ieee802_11_elems *elems);
 910
 911 #ifdef CONFIG_MAC80211_MESH
 912 void ieee80211_start_mesh(struct net_device *dev);
 913 #else
 914 static inline void ieee80211_start_mesh(struct net_device *dev)
 915 {}
 916 #endif
 917
 918 /* ieee80211_iface.c */
 919 int ieee80211_if_add(struct net_device *dev, const char *name,
 920                      struct net_device **new_dev, int type,
 921                      struct vif_params *params);
 922 void ieee80211_if_set_type(struct net_device *dev, int type);
 923 void ieee80211_if_reinit(struct net_device *dev);
 924 void __ieee80211_if_del(struct ieee80211_local *local,
 925                         struct ieee80211_sub_if_data *sdata);
 926 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 927 void ieee80211_if_free(struct net_device *dev);
 928 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 929
 930 /* tx handling */
 931 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 932 void ieee80211_tx_pending(unsigned long data);
 933 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 934 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 935 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 936
 937 /* utility functions/constants */
 938 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 939 extern const unsigned char rfc1042_header[6];
 940 extern const unsigned char bridge_tunnel_header[6];
 941 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 942                         enum ieee80211_if_types type);
 943 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 944                              int rate, int erp, int short_preamble);
 945 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 946                                      struct ieee80211_hdr *hdr);
 947
 948 #endif /* IEEE80211_I_H */