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