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         u8 *ht_add_ie;
  96         size_t ht_add_ie_len;
  97 #ifdef CONFIG_MAC80211_MESH
  98         u8 *mesh_id;
  99         size_t mesh_id_len;
 100         u8 *mesh_cfg;
 101 #endif
 102 #define IEEE80211_MAX_SUPP_RATES 32
 103         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 104         size_t supp_rates_len;
 105         u64 timestamp;
 106         int beacon_int;
 107
 108         bool probe_resp;
 109         unsigned long last_update;
 110
 111         /* during assocation, we save an ERP value from a probe response so
 112          * that we can feed ERP info to the driver when handling the
 113          * association completes. these fields probably won't be up-to-date
 114          * otherwise, you probably don't want to use them. */
 115         int has_erp_value;
 116         u8 erp_value;
 117 };
 118
 119 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 120 {
 121 #ifdef CONFIG_MAC80211_MESH
 122         return bss->mesh_cfg;
 123 #endif
 124         return NULL;
 125 }
 126
 127 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 128 {
 129 #ifdef CONFIG_MAC80211_MESH
 130         return bss->mesh_id;
 131 #endif
 132         return NULL;
 133 }
 134
 135 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 136 {
 137 #ifdef CONFIG_MAC80211_MESH
 138         return bss->mesh_id_len;
 139 #endif
 140         return 0;
 141 }
 142
 143
 144 typedef unsigned __bitwise__ ieee80211_tx_result;
 145 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 146 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 147 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 148
 149 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 150 #define IEEE80211_TX_UNICAST            BIT(1)
 151 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 152 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 153
 154 struct ieee80211_tx_data {
 155         struct sk_buff *skb;
 156         struct net_device *dev;
 157         struct ieee80211_local *local;
 158         struct ieee80211_sub_if_data *sdata;
 159         struct sta_info *sta;
 160         struct ieee80211_key *key;
 161
 162         struct ieee80211_channel *channel;
 163         s8 rate_idx;
 164         /* use this rate (if set) for last fragment; rate can
 165          * be set to lower rate for the first fragments, e.g.,
 166          * when using CTS protection with IEEE 802.11g. */
 167         s8 last_frag_rate_idx;
 168
 169         /* Extra fragments (in addition to the first fragment
 170          * in skb) */
 171         struct sk_buff **extra_frag;
 172         int num_extra_frag;
 173
 174         u16 fc, ethertype;
 175         unsigned int flags;
 176 };
 177
 178
 179 typedef unsigned __bitwise__ ieee80211_rx_result;
 180 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 181 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 182 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 183 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 184
 185 #define IEEE80211_RX_IN_SCAN            BIT(0)
 186 /* frame is destined to interface currently processed (incl. multicast frames) */
 187 #define IEEE80211_RX_RA_MATCH           BIT(1)
 188 #define IEEE80211_RX_AMSDU              BIT(2)
 189 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 190 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 191
 192 struct ieee80211_rx_data {
 193         struct sk_buff *skb;
 194         struct net_device *dev;
 195         struct ieee80211_local *local;
 196         struct ieee80211_sub_if_data *sdata;
 197         struct sta_info *sta;
 198         struct ieee80211_key *key;
 199         struct ieee80211_rx_status *status;
 200         struct ieee80211_rate *rate;
 201
 202         u16 fc, ethertype;
 203         unsigned int flags;
 204         int sent_ps_buffered;
 205         int queue;
 206         u32 tkip_iv32;
 207         u16 tkip_iv16;
 208 };
 209
 210 struct ieee80211_tx_stored_packet {
 211         struct sk_buff *skb;
 212         struct sk_buff **extra_frag;
 213         s8 last_frag_rate_idx;
 214         int num_extra_frag;
 215         bool last_frag_rate_ctrl_probe;
 216 };
 217
 218 struct beacon_data {
 219         u8 *head, *tail;
 220         int head_len, tail_len;
 221         int dtim_period;
 222 };
 223
 224 struct ieee80211_if_ap {
 225         struct beacon_data *beacon;
 226
 227         struct list_head vlans;
 228
 229         u8 ssid[IEEE80211_MAX_SSID_LEN];
 230         size_t ssid_len;
 231
 232         /* yes, this looks ugly, but guarantees that we can later use
 233          * bitmap_empty :)
 234          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 235         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 236         struct sk_buff_head ps_bc_buf;
 237         atomic_t num_sta_ps; /* number of stations in PS mode */
 238         int dtim_count;
 239         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 240         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 241         int num_beacons; /* number of TXed beacon frames for this BSS */
 242 };
 243
 244 struct ieee80211_if_wds {
 245         struct sta_info *sta;
 246         u8 remote_addr[ETH_ALEN];
 247 };
 248
 249 struct ieee80211_if_vlan {
 250         struct ieee80211_sub_if_data *ap;
 251         struct list_head list;
 252 };
 253
 254 struct mesh_stats {
 255         __u32 fwded_frames;             /* Mesh forwarded frames */
 256         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 257         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 258         atomic_t estab_plinks;
 259 };
 260
 261 #define PREQ_Q_F_START          0x1
 262 #define PREQ_Q_F_REFRESH        0x2
 263 struct mesh_preq_queue {
 264         struct list_head list;
 265         u8 dst[ETH_ALEN];
 266         u8 flags;
 267 };
 268
 269 struct mesh_config {
 270         /* Timeouts in ms */
 271         /* Mesh plink management parameters */
 272         u16 dot11MeshRetryTimeout;
 273         u16 dot11MeshConfirmTimeout;
 274         u16 dot11MeshHoldingTimeout;
 275         u16 dot11MeshMaxPeerLinks;
 276         u8  dot11MeshMaxRetries;
 277         u8  dot11MeshTTL;
 278         bool auto_open_plinks;
 279         /* HWMP parameters */
 280         u8  dot11MeshHWMPmaxPREQretries;
 281         u32 path_refresh_time;
 282         u16 min_discovery_timeout;
 283         u32 dot11MeshHWMPactivePathTimeout;
 284         u16 dot11MeshHWMPpreqMinInterval;
 285         u16 dot11MeshHWMPnetDiameterTraversalTime;
 286 };
 287
 288
 289 /* flags used in struct ieee80211_if_sta.flags */
 290 #define IEEE80211_STA_SSID_SET          BIT(0)
 291 #define IEEE80211_STA_BSSID_SET         BIT(1)
 292 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 293 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 294 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 295 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 296 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 297 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 298 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 299 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 300 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 301 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 302 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 303 struct ieee80211_if_sta {
 304         struct timer_list timer;
 305         struct work_struct work;
 306         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 307         u8 ssid[IEEE80211_MAX_SSID_LEN];
 308         enum {
 309                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 310                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 311                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED,
 312                 IEEE80211_MESH_UP
 313         } state;
 314         size_t ssid_len;
 315         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 316         size_t scan_ssid_len;
 317 #ifdef CONFIG_MAC80211_MESH
 318         struct timer_list mesh_path_timer;
 319         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 320         size_t mesh_id_len;
 321         /* Active Path Selection Protocol Identifier */
 322         u8 mesh_pp_id[4];
 323         /* Active Path Selection Metric Identifier */
 324         u8 mesh_pm_id[4];
 325         /* Congestion Control Mode Identifier */
 326         u8 mesh_cc_id[4];
 327         /* Local mesh Destination Sequence Number */
 328         u32 dsn;
 329         /* Last used PREQ ID */
 330         u32 preq_id;
 331         atomic_t mpaths;
 332         /* Timestamp of last DSN update */
 333         unsigned long last_dsn_update;
 334         /* Timestamp of last DSN sent */
 335         unsigned long last_preq;
 336         struct mesh_rmc *rmc;
 337         spinlock_t mesh_preq_queue_lock;
 338         struct mesh_preq_queue preq_queue;
 339         int preq_queue_len;
 340         struct mesh_stats mshstats;
 341         struct mesh_config mshcfg;
 342         u32 mesh_seqnum;
 343         bool accepting_plinks;
 344 #endif
 345         u16 aid;
 346         u16 ap_capab, capab;
 347         u8 *extra_ie; /* to be added to the end of AssocReq */
 348         size_t extra_ie_len;
 349
 350         /* The last AssocReq/Resp IEs */
 351         u8 *assocreq_ies, *assocresp_ies;
 352         size_t assocreq_ies_len, assocresp_ies_len;
 353
 354         struct sk_buff_head skb_queue;
 355
 356         int auth_tries, assoc_tries;
 357
 358         unsigned long request;
 359
 360         unsigned long last_probe;
 361
 362         unsigned int flags;
 363 #define IEEE80211_STA_REQ_SCAN 0
 364 #define IEEE80211_STA_REQ_AUTH 1
 365 #define IEEE80211_STA_REQ_RUN  2
 366
 367 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 368 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 369 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 370         unsigned int auth_algs; /* bitfield of allowed auth algs */
 371         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 372         int auth_transaction;
 373
 374         unsigned long ibss_join_req;
 375         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 376         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 377
 378         int wmm_last_param_set;
 379         int num_beacons; /* number of TXed beacon frames by this STA */
 380 };
 381
 382 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 383                                                 u8 mesh_id_len, u8 *mesh_id)
 384 {
 385 #ifdef CONFIG_MAC80211_MESH
 386         ifsta->mesh_id_len = mesh_id_len;
 387         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 388 #endif
 389 }
 390
 391 #ifdef CONFIG_MAC80211_MESH
 392 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 393         do { (sta)->mshstats.name++; } while (0)
 394 #else
 395 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 396         do { } while (0)
 397 #endif
 398
 399 /* flags used in struct ieee80211_sub_if_data.flags */
 400 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 401 #define IEEE80211_SDATA_PROMISC         BIT(1)
 402 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 403 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 404 struct ieee80211_sub_if_data {
 405         struct list_head list;
 406
 407         struct wireless_dev wdev;
 408
 409         /* keys */
 410         struct list_head key_list;
 411
 412         struct net_device *dev;
 413         struct ieee80211_local *local;
 414
 415         unsigned int flags;
 416
 417         int drop_unencrypted;
 418
 419         /*
 420          * basic rates of this AP or the AP we're associated to
 421          */
 422         u64 basic_rates;
 423
 424         u16 sequence;
 425
 426         /* Fragment table for host-based reassembly */
 427         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 428         unsigned int fragment_next;
 429
 430 #define NUM_DEFAULT_KEYS 4
 431         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 432         struct ieee80211_key *default_key;
 433
 434         /*
 435          * BSS configuration for this interface.
 436          *
 437          * FIXME: I feel bad putting this here when we already have a
 438          *        bss pointer, but the bss pointer is just wrong when
 439          *        you have multiple virtual STA mode interfaces...
 440          *        This needs to be fixed.
 441          */
 442         struct ieee80211_bss_conf bss_conf;
 443         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 444
 445         union {
 446                 struct ieee80211_if_ap ap;
 447                 struct ieee80211_if_wds wds;
 448                 struct ieee80211_if_vlan vlan;
 449                 struct ieee80211_if_sta sta;
 450                 u32 mntr_flags;
 451         } u;
 452
 453 #ifdef CONFIG_MAC80211_DEBUGFS
 454         struct dentry *debugfsdir;
 455         union {
 456                 struct {
 457                         struct dentry *drop_unencrypted;
 458                         struct dentry *state;
 459                         struct dentry *bssid;
 460                         struct dentry *prev_bssid;
 461                         struct dentry *ssid_len;
 462                         struct dentry *aid;
 463                         struct dentry *ap_capab;
 464                         struct dentry *capab;
 465                         struct dentry *extra_ie_len;
 466                         struct dentry *auth_tries;
 467                         struct dentry *assoc_tries;
 468                         struct dentry *auth_algs;
 469                         struct dentry *auth_alg;
 470                         struct dentry *auth_transaction;
 471                         struct dentry *flags;
 472                         struct dentry *num_beacons_sta;
 473                 } sta;
 474                 struct {
 475                         struct dentry *drop_unencrypted;
 476                         struct dentry *num_sta_ps;
 477                         struct dentry *dtim_count;
 478                         struct dentry *num_beacons;
 479                         struct dentry *force_unicast_rateidx;
 480                         struct dentry *max_ratectrl_rateidx;
 481                         struct dentry *num_buffered_multicast;
 482                 } ap;
 483                 struct {
 484                         struct dentry *drop_unencrypted;
 485                         struct dentry *peer;
 486                 } wds;
 487                 struct {
 488                         struct dentry *drop_unencrypted;
 489                 } vlan;
 490                 struct {
 491                         struct dentry *mode;
 492                 } monitor;
 493                 struct dentry *default_key;
 494         } debugfs;
 495
 496 #ifdef CONFIG_MAC80211_MESH
 497         struct dentry *mesh_stats_dir;
 498         struct {
 499                 struct dentry *fwded_frames;
 500                 struct dentry *dropped_frames_ttl;
 501                 struct dentry *dropped_frames_no_route;
 502                 struct dentry *estab_plinks;
 503                 struct timer_list mesh_path_timer;
 504         } mesh_stats;
 505
 506         struct dentry *mesh_config_dir;
 507         struct {
 508                 struct dentry *dot11MeshRetryTimeout;
 509                 struct dentry *dot11MeshConfirmTimeout;
 510                 struct dentry *dot11MeshHoldingTimeout;
 511                 struct dentry *dot11MeshMaxRetries;
 512                 struct dentry *dot11MeshTTL;
 513                 struct dentry *auto_open_plinks;
 514                 struct dentry *dot11MeshMaxPeerLinks;
 515                 struct dentry *dot11MeshHWMPactivePathTimeout;
 516                 struct dentry *dot11MeshHWMPpreqMinInterval;
 517                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 518                 struct dentry *dot11MeshHWMPmaxPREQretries;
 519                 struct dentry *path_refresh_time;
 520                 struct dentry *min_discovery_timeout;
 521         } mesh_config;
 522 #endif
 523
 524 #endif
 525         /* must be last, dynamically sized area in this! */
 526         struct ieee80211_vif vif;
 527 };
 528
 529 static inline
 530 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 531 {
 532         return container_of(p, struct ieee80211_sub_if_data, vif);
 533 }
 534
 535 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 536
 537 enum {
 538         IEEE80211_RX_MSG        = 1,
 539         IEEE80211_TX_STATUS_MSG = 2,
 540         IEEE80211_DELBA_MSG     = 3,
 541         IEEE80211_ADDBA_MSG     = 4,
 542 };
 543
 544 struct ieee80211_local {
 545         /* embed the driver visible part.
 546          * don't cast (use the static inlines below), but we keep
 547          * it first anyway so they become a no-op */
 548         struct ieee80211_hw hw;
 549
 550         const struct ieee80211_ops *ops;
 551
 552         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 553         int open_count;
 554         int monitors, cooked_mntrs;
 555         /* number of interfaces with corresponding FIF_ flags */
 556         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 557         unsigned int filter_flags; /* FIF_* */
 558         struct iw_statistics wstats;
 559         u8 wstats_flags;
 560         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 561         int tx_headroom; /* required headroom for hardware/radiotap */
 562
 563         enum {
 564                 IEEE80211_DEV_UNINITIALIZED = 0,
 565                 IEEE80211_DEV_REGISTERED,
 566                 IEEE80211_DEV_UNREGISTERED,
 567         } reg_state;
 568
 569         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 570          * added to skb_queue will be processed, but frames in
 571          * skb_queue_unreliable may be dropped if the total length of these
 572          * queues increases over the limit. */
 573 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 574         struct tasklet_struct tasklet;
 575         struct sk_buff_head skb_queue;
 576         struct sk_buff_head skb_queue_unreliable;
 577
 578         /* Station data */
 579         /*
 580          * The lock only protects the list, hash, timer and counter
 581          * against manipulation, reads are done in RCU. Additionally,
 582          * the lock protects each BSS's TIM bitmap.
 583          */
 584         spinlock_t sta_lock;
 585         unsigned long num_sta;
 586         struct list_head sta_list;
 587         struct list_head sta_flush_list;
 588         struct work_struct sta_flush_work;
 589         struct sta_info *sta_hash[STA_HASH_SIZE];
 590         struct timer_list sta_cleanup;
 591
 592         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 593         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 594         struct tasklet_struct tx_pending_tasklet;
 595
 596         /* number of interfaces with corresponding IFF_ flags */
 597         atomic_t iff_allmultis, iff_promiscs;
 598
 599         struct rate_control_ref *rate_ctrl;
 600
 601         int rts_threshold;
 602         int fragmentation_threshold;
 603         int short_retry_limit; /* dot11ShortRetryLimit */
 604         int long_retry_limit; /* dot11LongRetryLimit */
 605
 606         struct crypto_blkcipher *wep_tx_tfm;
 607         struct crypto_blkcipher *wep_rx_tfm;
 608         u32 wep_iv;
 609
 610         int bridge_packets; /* bridge packets between associated stations and
 611                              * deliver multicast frames both back to wireless
 612                              * media and to the local net stack */
 613
 614         struct list_head interfaces;
 615
 616         /*
 617          * Key lock, protects sdata's key_list and sta_info's
 618          * key pointers (write access, they're RCU.)
 619          */
 620         spinlock_t key_lock;
 621
 622
 623         bool sta_sw_scanning;
 624         bool sta_hw_scanning;
 625         int scan_channel_idx;
 626         enum ieee80211_band scan_band;
 627
 628         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 629         unsigned long last_scan_completed;
 630         struct delayed_work scan_work;
 631         struct net_device *scan_dev;
 632         struct ieee80211_channel *oper_channel, *scan_channel;
 633         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 634         size_t scan_ssid_len;
 635         struct list_head sta_bss_list;
 636         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 637         spinlock_t sta_bss_lock;
 638
 639         /* SNMP counters */
 640         /* dot11CountersTable */
 641         u32 dot11TransmittedFragmentCount;
 642         u32 dot11MulticastTransmittedFrameCount;
 643         u32 dot11FailedCount;
 644         u32 dot11RetryCount;
 645         u32 dot11MultipleRetryCount;
 646         u32 dot11FrameDuplicateCount;
 647         u32 dot11ReceivedFragmentCount;
 648         u32 dot11MulticastReceivedFrameCount;
 649         u32 dot11TransmittedFrameCount;
 650         u32 dot11WEPUndecryptableCount;
 651
 652 #ifdef CONFIG_MAC80211_LEDS
 653         int tx_led_counter, rx_led_counter;
 654         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 655         char tx_led_name[32], rx_led_name[32],
 656              assoc_led_name[32], radio_led_name[32];
 657 #endif
 658
 659 #ifdef CONFIG_MAC80211_DEBUGFS
 660         struct work_struct sta_debugfs_add;
 661 #endif
 662
 663 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 664         /* TX/RX handler statistics */
 665         unsigned int tx_handlers_drop;
 666         unsigned int tx_handlers_queued;
 667         unsigned int tx_handlers_drop_unencrypted;
 668         unsigned int tx_handlers_drop_fragment;
 669         unsigned int tx_handlers_drop_wep;
 670         unsigned int tx_handlers_drop_not_assoc;
 671         unsigned int tx_handlers_drop_unauth_port;
 672         unsigned int rx_handlers_drop;
 673         unsigned int rx_handlers_queued;
 674         unsigned int rx_handlers_drop_nullfunc;
 675         unsigned int rx_handlers_drop_defrag;
 676         unsigned int rx_handlers_drop_short;
 677         unsigned int rx_handlers_drop_passive_scan;
 678         unsigned int tx_expand_skb_head;
 679         unsigned int tx_expand_skb_head_cloned;
 680         unsigned int rx_expand_skb_head;
 681         unsigned int rx_expand_skb_head2;
 682         unsigned int rx_handlers_fragments;
 683         unsigned int tx_status_drop;
 684 #define I802_DEBUG_INC(c) (c)++
 685 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 686 #define I802_DEBUG_INC(c) do { } while (0)
 687 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 688
 689
 690         int total_ps_buffered; /* total number of all buffered unicast and
 691                                 * multicast packets for power saving stations
 692                                 */
 693         int wifi_wme_noack_test;
 694         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 695
 696 #ifdef CONFIG_MAC80211_DEBUGFS
 697         struct local_debugfsdentries {
 698                 struct dentry *frequency;
 699                 struct dentry *antenna_sel_tx;
 700                 struct dentry *antenna_sel_rx;
 701                 struct dentry *bridge_packets;
 702                 struct dentry *rts_threshold;
 703                 struct dentry *fragmentation_threshold;
 704                 struct dentry *short_retry_limit;
 705                 struct dentry *long_retry_limit;
 706                 struct dentry *total_ps_buffered;
 707                 struct dentry *wep_iv;
 708                 struct dentry *statistics;
 709                 struct local_debugfsdentries_statsdentries {
 710                         struct dentry *transmitted_fragment_count;
 711                         struct dentry *multicast_transmitted_frame_count;
 712                         struct dentry *failed_count;
 713                         struct dentry *retry_count;
 714                         struct dentry *multiple_retry_count;
 715                         struct dentry *frame_duplicate_count;
 716                         struct dentry *received_fragment_count;
 717                         struct dentry *multicast_received_frame_count;
 718                         struct dentry *transmitted_frame_count;
 719                         struct dentry *wep_undecryptable_count;
 720                         struct dentry *num_scans;
 721 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 722                         struct dentry *tx_handlers_drop;
 723                         struct dentry *tx_handlers_queued;
 724                         struct dentry *tx_handlers_drop_unencrypted;
 725                         struct dentry *tx_handlers_drop_fragment;
 726                         struct dentry *tx_handlers_drop_wep;
 727                         struct dentry *tx_handlers_drop_not_assoc;
 728                         struct dentry *tx_handlers_drop_unauth_port;
 729                         struct dentry *rx_handlers_drop;
 730                         struct dentry *rx_handlers_queued;
 731                         struct dentry *rx_handlers_drop_nullfunc;
 732                         struct dentry *rx_handlers_drop_defrag;
 733                         struct dentry *rx_handlers_drop_short;
 734                         struct dentry *rx_handlers_drop_passive_scan;
 735                         struct dentry *tx_expand_skb_head;
 736                         struct dentry *tx_expand_skb_head_cloned;
 737                         struct dentry *rx_expand_skb_head;
 738                         struct dentry *rx_expand_skb_head2;
 739                         struct dentry *rx_handlers_fragments;
 740                         struct dentry *tx_status_drop;
 741 #endif
 742                         struct dentry *dot11ACKFailureCount;
 743                         struct dentry *dot11RTSFailureCount;
 744                         struct dentry *dot11FCSErrorCount;
 745                         struct dentry *dot11RTSSuccessCount;
 746                 } stats;
 747                 struct dentry *stations;
 748                 struct dentry *keys;
 749         } debugfs;
 750 #endif
 751 };
 752
 753 static inline int ieee80211_is_multiqueue(struct ieee80211_local *local)
 754 {
 755 #ifdef CONFIG_MAC80211_QOS
 756         return netif_is_multiqueue(local->mdev);
 757 #else
 758         return 0;
 759 #endif
 760 }
 761
 762 /* this struct represents 802.11n's RA/TID combination */
 763 struct ieee80211_ra_tid {
 764         u8 ra[ETH_ALEN];
 765         u16 tid;
 766 };
 767
 768 /* Parsed Information Elements */
 769 struct ieee802_11_elems {
 770         /* pointers to IEs */
 771         u8 *ssid;
 772         u8 *supp_rates;
 773         u8 *fh_params;
 774         u8 *ds_params;
 775         u8 *cf_params;
 776         u8 *tim;
 777         u8 *ibss_params;
 778         u8 *challenge;
 779         u8 *wpa;
 780         u8 *rsn;
 781         u8 *erp_info;
 782         u8 *ext_supp_rates;
 783         u8 *wmm_info;
 784         u8 *wmm_param;
 785         u8 *ht_cap_elem;
 786         u8 *ht_info_elem;
 787         u8 *mesh_config;
 788         u8 *mesh_id;
 789         u8 *peer_link;
 790         u8 *preq;
 791         u8 *prep;
 792         u8 *perr;
 793
 794         /* length of them, respectively */
 795         u8 ssid_len;
 796         u8 supp_rates_len;
 797         u8 fh_params_len;
 798         u8 ds_params_len;
 799         u8 cf_params_len;
 800         u8 tim_len;
 801         u8 ibss_params_len;
 802         u8 challenge_len;
 803         u8 wpa_len;
 804         u8 rsn_len;
 805         u8 erp_info_len;
 806         u8 ext_supp_rates_len;
 807         u8 wmm_info_len;
 808         u8 wmm_param_len;
 809         u8 ht_cap_elem_len;
 810         u8 ht_info_elem_len;
 811         u8 mesh_config_len;
 812         u8 mesh_id_len;
 813         u8 peer_link_len;
 814         u8 preq_len;
 815         u8 prep_len;
 816         u8 perr_len;
 817 };
 818
 819 static inline struct ieee80211_local *hw_to_local(
 820         struct ieee80211_hw *hw)
 821 {
 822         return container_of(hw, struct ieee80211_local, hw);
 823 }
 824
 825 static inline struct ieee80211_hw *local_to_hw(
 826         struct ieee80211_local *local)
 827 {
 828         return &local->hw;
 829 }
 830
 831 struct sta_attribute {
 832         struct attribute attr;
 833         ssize_t (*show)(const struct sta_info *, char *buf);
 834         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 835 };
 836
 837 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 838 {
 839         return compare_ether_addr(raddr, addr) == 0 ||
 840                is_broadcast_ether_addr(raddr);
 841 }
 842
 843
 844 /* ieee80211.c */
 845 int ieee80211_hw_config(struct ieee80211_local *local);
 846 int ieee80211_if_config(struct net_device *dev);
 847 int ieee80211_if_config_beacon(struct net_device *dev);
 848 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 849 void ieee80211_if_setup(struct net_device *dev);
 850 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 851                         struct ieee80211_ht_info *req_ht_cap,
 852                         struct ieee80211_ht_bss_info *req_bss_cap);
 853
 854 /* ieee80211_ioctl.c */
 855 extern const struct iw_handler_def ieee80211_iw_handler_def;
 856 int ieee80211_set_freq(struct ieee80211_local *local, int freq);
 857 /* ieee80211_sta.c */
 858 void ieee80211_sta_timer(unsigned long data);
 859 void ieee80211_sta_work(struct work_struct *work);
 860 void ieee80211_sta_scan_work(struct work_struct *work);
 861 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 862                            struct ieee80211_rx_status *rx_status);
 863 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 864 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 865 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 866 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 867 void ieee80211_sta_req_auth(struct net_device *dev,
 868                             struct ieee80211_if_sta *ifsta);
 869 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 870 ieee80211_rx_result ieee80211_sta_rx_scan(
 871         struct net_device *dev, struct sk_buff *skb,
 872         struct ieee80211_rx_status *rx_status);
 873 void ieee80211_rx_bss_list_init(struct net_device *dev);
 874 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 875 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 876 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
 877                                         struct sk_buff *skb, u8 *bssid,
 878                                         u8 *addr);
 879 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 880 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 881 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 882                                       u32 changed);
 883 void ieee80211_reset_erp_info(struct net_device *dev);
 884 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 885                                    struct ieee80211_ht_info *ht_info);
 886 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 887                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 888                         struct ieee80211_ht_bss_info *bss_info);
 889 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
 890                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 891                                   u16 agg_size, u16 timeout);
 892 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
 893                                 u16 initiator, u16 reason_code);
 894
 895 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
 896                                 u16 tid, u16 initiator, u16 reason);
 897 void sta_addba_resp_timer_expired(unsigned long data);
 898 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
 899 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 900                             struct ieee802_11_elems *elems,
 901                             enum ieee80211_band band);
 902 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 903                 int encrypt);
 904 void ieee802_11_parse_elems(u8 *start, size_t len,
 905                                    struct ieee802_11_elems *elems);
 906
 907 #ifdef CONFIG_MAC80211_MESH
 908 void ieee80211_start_mesh(struct net_device *dev);
 909 #else
 910 static inline void ieee80211_start_mesh(struct net_device *dev)
 911 {}
 912 #endif
 913
 914 /* ieee80211_iface.c */
 915 int ieee80211_if_add(struct net_device *dev, const char *name,
 916                      struct net_device **new_dev, int type,
 917                      struct vif_params *params);
 918 void ieee80211_if_set_type(struct net_device *dev, int type);
 919 void ieee80211_if_reinit(struct net_device *dev);
 920 void __ieee80211_if_del(struct ieee80211_local *local,
 921                         struct ieee80211_sub_if_data *sdata);
 922 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 923 void ieee80211_if_free(struct net_device *dev);
 924 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 925
 926 /* tx handling */
 927 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 928 void ieee80211_tx_pending(unsigned long data);
 929 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 930 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 931 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 932
 933 /* utility functions/constants */
 934 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 935 extern const unsigned char rfc1042_header[6];
 936 extern const unsigned char bridge_tunnel_header[6];
 937 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 938                         enum ieee80211_if_types type);
 939 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 940                              int rate, int erp, int short_preamble);
 941 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 942                                      struct ieee80211_hdr *hdr);
 943
 944 #endif /* IEEE80211_I_H */