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  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef IEEE80211_I_H
  12 #define IEEE80211_I_H
  13
  14 #include <linux/kernel.h>
  15 #include <linux/device.h>
  16 #include <linux/if_ether.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/list.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/types.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/etherdevice.h>
  25 #include <net/wireless.h>
  26 #include "ieee80211_key.h"
  27 #include "sta_info.h"
  28
  29 /* ieee80211.o internal definitions, etc. These are not included into
  30  * low-level drivers. */
  31
  32 #ifndef ETH_P_PAE
  33 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
  34 #endif /* ETH_P_PAE */
  35
  36 #define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
  37
  38 struct ieee80211_local;
  39
  40 #define IEEE80211_ALIGN32_PAD(a) ((4 - ((a) & 3)) & 3)
  41
  42 /* Maximum number of broadcast/multicast frames to buffer when some of the
  43  * associated stations are using power saving. */
  44 #define AP_MAX_BC_BUFFER 128
  45
  46 /* Maximum number of frames buffered to all STAs, including multicast frames.
  47  * Note: increasing this limit increases the potential memory requirement. Each
  48  * frame can be up to about 2 kB long. */
  49 #define TOTAL_MAX_TX_BUFFER 512
  50
  51 /* Required encryption head and tailroom */
  52 #define IEEE80211_ENCRYPT_HEADROOM 8
  53 #define IEEE80211_ENCRYPT_TAILROOM 12
  54
  55 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  56  * reception of at least three fragmented frames. This limit can be increased
  57  * by changing this define, at the cost of slower frame reassembly and
  58  * increased memory use (about 2 kB of RAM per entry). */
  59 #define IEEE80211_FRAGMENT_MAX 4
  60
  61 struct ieee80211_fragment_entry {
  62         unsigned long first_frag_time;
  63         unsigned int seq;
  64         unsigned int rx_queue;
  65         unsigned int last_frag;
  66         unsigned int extra_len;
  67         struct sk_buff_head skb_list;
  68         int ccmp; /* Whether fragments were encrypted with CCMP */
  69         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  70 };
  71
  72 struct bss_mesh_config {
  73         u32 path_proto_id;
  74         u32 path_metric_id;
  75         u32 cong_control_id;
  76         u32 channel_precedence;
  77         u8 mesh_version;
  78 };
  79
  80
  81 struct ieee80211_sta_bss {
  82         struct list_head list;
  83         struct ieee80211_sta_bss *hnext;
  84         size_t ssid_len;
  85
  86         atomic_t users;
  87
  88         u8 bssid[ETH_ALEN];
  89         u8 ssid[IEEE80211_MAX_SSID_LEN];
  90         u16 capability; /* host byte order */
  91         enum ieee80211_band band;
  92         int freq;
  93         int rssi, signal, noise;
  94         u8 *wpa_ie;
  95         size_t wpa_ie_len;
  96         u8 *rsn_ie;
  97         size_t rsn_ie_len;
  98         u8 *wmm_ie;
  99         size_t wmm_ie_len;
 100         u8 *ht_ie;
 101         size_t ht_ie_len;
 102 #ifdef CONFIG_MAC80211_MESH
 103         u8 *mesh_id;
 104         size_t mesh_id_len;
 105         struct bss_mesh_config *mesh_cfg;
 106 #endif
 107 #define IEEE80211_MAX_SUPP_RATES 32
 108         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 109         size_t supp_rates_len;
 110         u64 timestamp;
 111         int beacon_int;
 112
 113         int probe_resp;
 114         unsigned long last_update;
 115
 116         /* during assocation, we save an ERP value from a probe response so
 117          * that we can feed ERP info to the driver when handling the
 118          * association completes. these fields probably won't be up-to-date
 119          * otherwise, you probably don't want to use them. */
 120         int has_erp_value;
 121         u8 erp_value;
 122 };
 123
 124 static inline
 125 struct bss_mesh_config *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 126 {
 127 #ifdef CONFIG_MAC80211_MESH
 128         return bss->mesh_cfg;
 129 #endif
 130         return NULL;
 131 }
 132
 133 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 134 {
 135 #ifdef CONFIG_MAC80211_MESH
 136         return bss->mesh_id;
 137 #endif
 138         return NULL;
 139 }
 140
 141 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 142 {
 143 #ifdef CONFIG_MAC80211_MESH
 144         return bss->mesh_id_len;
 145 #endif
 146         return 0;
 147 }
 148
 149
 150 typedef unsigned __bitwise__ ieee80211_tx_result;
 151 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 152 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 153 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 154
 155 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 156 #define IEEE80211_TX_UNICAST            BIT(1)
 157 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 158 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 159 #define IEEE80211_TX_INJECTED           BIT(4)
 160
 161 struct ieee80211_tx_data {
 162         struct sk_buff *skb;
 163         struct net_device *dev;
 164         struct ieee80211_local *local;
 165         struct ieee80211_sub_if_data *sdata;
 166         struct sta_info *sta;
 167         struct ieee80211_key *key;
 168
 169         struct ieee80211_tx_control *control;
 170         struct ieee80211_channel *channel;
 171         struct ieee80211_rate *rate;
 172         /* use this rate (if set) for last fragment; rate can
 173          * be set to lower rate for the first fragments, e.g.,
 174          * when using CTS protection with IEEE 802.11g. */
 175         struct ieee80211_rate *last_frag_rate;
 176
 177         /* Extra fragments (in addition to the first fragment
 178          * in skb) */
 179         struct sk_buff **extra_frag;
 180         int num_extra_frag;
 181
 182         u16 fc, ethertype;
 183         unsigned int flags;
 184 };
 185
 186
 187 typedef unsigned __bitwise__ ieee80211_rx_result;
 188 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 189 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 190 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 191 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 192
 193 #define IEEE80211_RX_IN_SCAN            BIT(0)
 194 /* frame is destined to interface currently processed (incl. multicast frames) */
 195 #define IEEE80211_RX_RA_MATCH           BIT(1)
 196 #define IEEE80211_RX_AMSDU              BIT(2)
 197 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 198 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 199
 200 struct ieee80211_rx_data {
 201         struct sk_buff *skb;
 202         struct net_device *dev;
 203         struct ieee80211_local *local;
 204         struct ieee80211_sub_if_data *sdata;
 205         struct sta_info *sta;
 206         struct ieee80211_key *key;
 207         struct ieee80211_rx_status *status;
 208         struct ieee80211_rate *rate;
 209
 210         u16 fc, ethertype;
 211         unsigned int flags;
 212         int sent_ps_buffered;
 213         int queue;
 214         int load;
 215         u32 tkip_iv32;
 216         u16 tkip_iv16;
 217 };
 218
 219 /* flags used in struct ieee80211_tx_packet_data.flags */
 220 #define IEEE80211_TXPD_REQ_TX_STATUS    BIT(0)
 221 #define IEEE80211_TXPD_DO_NOT_ENCRYPT   BIT(1)
 222 #define IEEE80211_TXPD_REQUEUE          BIT(2)
 223 #define IEEE80211_TXPD_EAPOL_FRAME      BIT(3)
 224 #define IEEE80211_TXPD_AMPDU            BIT(4)
 225 /* Stored in sk_buff->cb */
 226 struct ieee80211_tx_packet_data {
 227         int ifindex;
 228         unsigned long jiffies;
 229         unsigned int flags;
 230         u8 queue;
 231 };
 232
 233 struct ieee80211_tx_stored_packet {
 234         struct ieee80211_tx_control control;
 235         struct sk_buff *skb;
 236         struct sk_buff **extra_frag;
 237         struct ieee80211_rate *last_frag_rate;
 238         int num_extra_frag;
 239         unsigned int last_frag_rate_ctrl_probe;
 240 };
 241
 242 struct beacon_data {
 243         u8 *head, *tail;
 244         int head_len, tail_len;
 245         int dtim_period;
 246 };
 247
 248 struct ieee80211_if_ap {
 249         struct beacon_data *beacon;
 250
 251         struct list_head vlans;
 252
 253         u8 ssid[IEEE80211_MAX_SSID_LEN];
 254         size_t ssid_len;
 255
 256         /* yes, this looks ugly, but guarantees that we can later use
 257          * bitmap_empty :)
 258          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 259         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 260         struct sk_buff_head ps_bc_buf;
 261         atomic_t num_sta_ps; /* number of stations in PS mode */
 262         int dtim_count;
 263         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 264         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 265         int num_beacons; /* number of TXed beacon frames for this BSS */
 266 };
 267
 268 struct ieee80211_if_wds {
 269         struct sta_info *sta;
 270         u8 remote_addr[ETH_ALEN];
 271 };
 272
 273 struct ieee80211_if_vlan {
 274         struct ieee80211_sub_if_data *ap;
 275         struct list_head list;
 276 };
 277
 278 struct mesh_stats {
 279         __u32 fwded_frames;             /* Mesh forwarded frames */
 280         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 281         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 282         atomic_t estab_plinks;
 283 };
 284
 285 #define PREQ_Q_F_START          0x1
 286 #define PREQ_Q_F_REFRESH        0x2
 287 struct mesh_preq_queue {
 288         struct list_head list;
 289         u8 dst[ETH_ALEN];
 290         u8 flags;
 291 };
 292
 293 struct mesh_config {
 294         /* Timeouts in ms */
 295         /* Mesh plink management parameters */
 296         u16 dot11MeshRetryTimeout;
 297         u16 dot11MeshConfirmTimeout;
 298         u16 dot11MeshHoldingTimeout;
 299         u16 dot11MeshMaxPeerLinks;
 300         u8  dot11MeshMaxRetries;
 301         u8  dot11MeshTTL;
 302         bool auto_open_plinks;
 303         /* HWMP parameters */
 304         u8  dot11MeshHWMPmaxPREQretries;
 305         u32 path_refresh_time;
 306         u16 min_discovery_timeout;
 307         u32 dot11MeshHWMPactivePathTimeout;
 308         u16 dot11MeshHWMPpreqMinInterval;
 309         u16 dot11MeshHWMPnetDiameterTraversalTime;
 310 };
 311
 312
 313 /* flags used in struct ieee80211_if_sta.flags */
 314 #define IEEE80211_STA_SSID_SET          BIT(0)
 315 #define IEEE80211_STA_BSSID_SET         BIT(1)
 316 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 317 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 318 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 319 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 320 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 321 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 322 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 323 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 324 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 325 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 326 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 327 struct ieee80211_if_sta {
 328         struct timer_list timer;
 329         struct work_struct work;
 330         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 331         u8 ssid[IEEE80211_MAX_SSID_LEN];
 332         enum {
 333                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 334                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 335                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED,
 336                 IEEE80211_MESH_UP
 337         } state;
 338         size_t ssid_len;
 339         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 340         size_t scan_ssid_len;
 341 #ifdef CONFIG_MAC80211_MESH
 342         struct timer_list mesh_path_timer;
 343         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 344         size_t mesh_id_len;
 345         /* Active Path Selection Protocol Identifier */
 346         u8 mesh_pp_id[4];
 347         /* Active Path Selection Metric Identifier */
 348         u8 mesh_pm_id[4];
 349         /* Congestion Control Mode Identifier */
 350         u8 mesh_cc_id[4];
 351         /* Local mesh Destination Sequence Number */
 352         u32 dsn;
 353         /* Last used PREQ ID */
 354         u32 preq_id;
 355         atomic_t mpaths;
 356         /* Timestamp of last DSN update */
 357         unsigned long last_dsn_update;
 358         /* Timestamp of last DSN sent */
 359         unsigned long last_preq;
 360         struct mesh_rmc *rmc;
 361         spinlock_t mesh_preq_queue_lock;
 362         struct mesh_preq_queue preq_queue;
 363         int preq_queue_len;
 364         struct mesh_stats mshstats;
 365         struct mesh_config mshcfg;
 366         u8 mesh_seqnum[3];
 367         bool accepting_plinks;
 368 #endif
 369         u16 aid;
 370         u16 ap_capab, capab;
 371         u8 *extra_ie; /* to be added to the end of AssocReq */
 372         size_t extra_ie_len;
 373
 374         /* The last AssocReq/Resp IEs */
 375         u8 *assocreq_ies, *assocresp_ies;
 376         size_t assocreq_ies_len, assocresp_ies_len;
 377
 378         struct sk_buff_head skb_queue;
 379
 380         int auth_tries, assoc_tries;
 381
 382         unsigned long request;
 383
 384         unsigned long last_probe;
 385
 386         unsigned int flags;
 387 #define IEEE80211_STA_REQ_SCAN 0
 388 #define IEEE80211_STA_REQ_AUTH 1
 389 #define IEEE80211_STA_REQ_RUN  2
 390
 391 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 392 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 393 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 394         unsigned int auth_algs; /* bitfield of allowed auth algs */
 395         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 396         int auth_transaction;
 397
 398         unsigned long ibss_join_req;
 399         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 400         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 401
 402         int wmm_last_param_set;
 403         int num_beacons; /* number of TXed beacon frames by this STA */
 404 };
 405
 406 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 407                                                 u8 mesh_id_len, u8 *mesh_id)
 408 {
 409 #ifdef CONFIG_MAC80211_MESH
 410         ifsta->mesh_id_len = mesh_id_len;
 411         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 412 #endif
 413 }
 414
 415 #ifdef CONFIG_MAC80211_MESH
 416 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 417         do { (sta)->mshstats.name++; } while (0)
 418 #else
 419 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 420         do { } while (0)
 421 #endif
 422
 423 /* flags used in struct ieee80211_sub_if_data.flags */
 424 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 425 #define IEEE80211_SDATA_PROMISC         BIT(1)
 426 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 427 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 428 struct ieee80211_sub_if_data {
 429         struct list_head list;
 430
 431         struct wireless_dev wdev;
 432
 433         /* keys */
 434         struct list_head key_list;
 435
 436         struct net_device *dev;
 437         struct ieee80211_local *local;
 438
 439         unsigned int flags;
 440
 441         int drop_unencrypted;
 442
 443         /*
 444          * basic rates of this AP or the AP we're associated to
 445          */
 446         u64 basic_rates;
 447
 448         u16 sequence;
 449
 450         /* Fragment table for host-based reassembly */
 451         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 452         unsigned int fragment_next;
 453
 454 #define NUM_DEFAULT_KEYS 4
 455         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 456         struct ieee80211_key *default_key;
 457
 458         /*
 459          * BSS configuration for this interface.
 460          *
 461          * FIXME: I feel bad putting this here when we already have a
 462          *        bss pointer, but the bss pointer is just wrong when
 463          *        you have multiple virtual STA mode interfaces...
 464          *        This needs to be fixed.
 465          */
 466         struct ieee80211_bss_conf bss_conf;
 467         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 468
 469         union {
 470                 struct ieee80211_if_ap ap;
 471                 struct ieee80211_if_wds wds;
 472                 struct ieee80211_if_vlan vlan;
 473                 struct ieee80211_if_sta sta;
 474                 u32 mntr_flags;
 475         } u;
 476         int channel_use;
 477         int channel_use_raw;
 478
 479 #ifdef CONFIG_MAC80211_DEBUGFS
 480         struct dentry *debugfsdir;
 481         union {
 482                 struct {
 483                         struct dentry *channel_use;
 484                         struct dentry *drop_unencrypted;
 485                         struct dentry *state;
 486                         struct dentry *bssid;
 487                         struct dentry *prev_bssid;
 488                         struct dentry *ssid_len;
 489                         struct dentry *aid;
 490                         struct dentry *ap_capab;
 491                         struct dentry *capab;
 492                         struct dentry *extra_ie_len;
 493                         struct dentry *auth_tries;
 494                         struct dentry *assoc_tries;
 495                         struct dentry *auth_algs;
 496                         struct dentry *auth_alg;
 497                         struct dentry *auth_transaction;
 498                         struct dentry *flags;
 499                         struct dentry *num_beacons_sta;
 500                 } sta;
 501                 struct {
 502                         struct dentry *channel_use;
 503                         struct dentry *drop_unencrypted;
 504                         struct dentry *num_sta_ps;
 505                         struct dentry *dtim_count;
 506                         struct dentry *num_beacons;
 507                         struct dentry *force_unicast_rateidx;
 508                         struct dentry *max_ratectrl_rateidx;
 509                         struct dentry *num_buffered_multicast;
 510                 } ap;
 511                 struct {
 512                         struct dentry *channel_use;
 513                         struct dentry *drop_unencrypted;
 514                         struct dentry *peer;
 515                 } wds;
 516                 struct {
 517                         struct dentry *channel_use;
 518                         struct dentry *drop_unencrypted;
 519                 } vlan;
 520                 struct {
 521                         struct dentry *mode;
 522                 } monitor;
 523                 struct dentry *default_key;
 524         } debugfs;
 525
 526 #ifdef CONFIG_MAC80211_MESH
 527         struct dentry *mesh_stats_dir;
 528         struct {
 529                 struct dentry *fwded_frames;
 530                 struct dentry *dropped_frames_ttl;
 531                 struct dentry *dropped_frames_no_route;
 532                 struct dentry *estab_plinks;
 533                 struct timer_list mesh_path_timer;
 534         } mesh_stats;
 535
 536         struct dentry *mesh_config_dir;
 537         struct {
 538                 struct dentry *dot11MeshRetryTimeout;
 539                 struct dentry *dot11MeshConfirmTimeout;
 540                 struct dentry *dot11MeshHoldingTimeout;
 541                 struct dentry *dot11MeshMaxRetries;
 542                 struct dentry *dot11MeshTTL;
 543                 struct dentry *auto_open_plinks;
 544                 struct dentry *dot11MeshMaxPeerLinks;
 545                 struct dentry *dot11MeshHWMPactivePathTimeout;
 546                 struct dentry *dot11MeshHWMPpreqMinInterval;
 547                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 548                 struct dentry *dot11MeshHWMPmaxPREQretries;
 549                 struct dentry *path_refresh_time;
 550                 struct dentry *min_discovery_timeout;
 551         } mesh_config;
 552 #endif
 553
 554 #endif
 555         /* must be last, dynamically sized area in this! */
 556         struct ieee80211_vif vif;
 557 };
 558
 559 static inline
 560 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 561 {
 562         return container_of(p, struct ieee80211_sub_if_data, vif);
 563 }
 564
 565 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 566
 567 enum {
 568         IEEE80211_RX_MSG        = 1,
 569         IEEE80211_TX_STATUS_MSG = 2,
 570         IEEE80211_DELBA_MSG     = 3,
 571         IEEE80211_ADDBA_MSG     = 4,
 572 };
 573
 574 struct ieee80211_local {
 575         /* embed the driver visible part.
 576          * don't cast (use the static inlines below), but we keep
 577          * it first anyway so they become a no-op */
 578         struct ieee80211_hw hw;
 579
 580         const struct ieee80211_ops *ops;
 581
 582         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 583         int open_count;
 584         int monitors, cooked_mntrs;
 585         /* number of interfaces with corresponding FIF_ flags */
 586         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 587         unsigned int filter_flags; /* FIF_* */
 588         struct iw_statistics wstats;
 589         u8 wstats_flags;
 590         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 591         int tx_headroom; /* required headroom for hardware/radiotap */
 592
 593         enum {
 594                 IEEE80211_DEV_UNINITIALIZED = 0,
 595                 IEEE80211_DEV_REGISTERED,
 596                 IEEE80211_DEV_UNREGISTERED,
 597         } reg_state;
 598
 599         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 600          * added to skb_queue will be processed, but frames in
 601          * skb_queue_unreliable may be dropped if the total length of these
 602          * queues increases over the limit. */
 603 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 604         struct tasklet_struct tasklet;
 605         struct sk_buff_head skb_queue;
 606         struct sk_buff_head skb_queue_unreliable;
 607
 608         /* Station data */
 609         /*
 610          * The lock only protects the list, hash, timer and counter
 611          * against manipulation, reads are done in RCU. Additionally,
 612          * the lock protects each BSS's TIM bitmap and a few items
 613          * in a STA info structure.
 614          */
 615         spinlock_t sta_lock;
 616         unsigned long num_sta;
 617         struct list_head sta_list;
 618         struct list_head sta_flush_list;
 619         struct work_struct sta_flush_work;
 620         struct sta_info *sta_hash[STA_HASH_SIZE];
 621         struct timer_list sta_cleanup;
 622
 623         unsigned long state[NUM_TX_DATA_QUEUES_AMPDU];
 624         struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES_AMPDU];
 625         struct tasklet_struct tx_pending_tasklet;
 626
 627         /* number of interfaces with corresponding IFF_ flags */
 628         atomic_t iff_allmultis, iff_promiscs;
 629
 630         struct rate_control_ref *rate_ctrl;
 631
 632         int rts_threshold;
 633         int fragmentation_threshold;
 634         int short_retry_limit; /* dot11ShortRetryLimit */
 635         int long_retry_limit; /* dot11LongRetryLimit */
 636
 637         struct crypto_blkcipher *wep_tx_tfm;
 638         struct crypto_blkcipher *wep_rx_tfm;
 639         u32 wep_iv;
 640
 641         int bridge_packets; /* bridge packets between associated stations and
 642                              * deliver multicast frames both back to wireless
 643                              * media and to the local net stack */
 644
 645         struct list_head interfaces;
 646
 647         bool sta_sw_scanning;
 648         bool sta_hw_scanning;
 649         int scan_channel_idx;
 650         enum ieee80211_band scan_band;
 651
 652         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 653         unsigned long last_scan_completed;
 654         struct delayed_work scan_work;
 655         struct net_device *scan_dev;
 656         struct ieee80211_channel *oper_channel, *scan_channel;
 657         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 658         size_t scan_ssid_len;
 659         struct list_head sta_bss_list;
 660         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 661         spinlock_t sta_bss_lock;
 662
 663         /* SNMP counters */
 664         /* dot11CountersTable */
 665         u32 dot11TransmittedFragmentCount;
 666         u32 dot11MulticastTransmittedFrameCount;
 667         u32 dot11FailedCount;
 668         u32 dot11RetryCount;
 669         u32 dot11MultipleRetryCount;
 670         u32 dot11FrameDuplicateCount;
 671         u32 dot11ReceivedFragmentCount;
 672         u32 dot11MulticastReceivedFrameCount;
 673         u32 dot11TransmittedFrameCount;
 674         u32 dot11WEPUndecryptableCount;
 675
 676 #ifdef CONFIG_MAC80211_LEDS
 677         int tx_led_counter, rx_led_counter;
 678         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 679         char tx_led_name[32], rx_led_name[32],
 680              assoc_led_name[32], radio_led_name[32];
 681 #endif
 682
 683         u32 channel_use;
 684         u32 channel_use_raw;
 685
 686 #ifdef CONFIG_MAC80211_DEBUGFS
 687         struct work_struct sta_debugfs_add;
 688 #endif
 689
 690 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 691         /* TX/RX handler statistics */
 692         unsigned int tx_handlers_drop;
 693         unsigned int tx_handlers_queued;
 694         unsigned int tx_handlers_drop_unencrypted;
 695         unsigned int tx_handlers_drop_fragment;
 696         unsigned int tx_handlers_drop_wep;
 697         unsigned int tx_handlers_drop_not_assoc;
 698         unsigned int tx_handlers_drop_unauth_port;
 699         unsigned int rx_handlers_drop;
 700         unsigned int rx_handlers_queued;
 701         unsigned int rx_handlers_drop_nullfunc;
 702         unsigned int rx_handlers_drop_defrag;
 703         unsigned int rx_handlers_drop_short;
 704         unsigned int rx_handlers_drop_passive_scan;
 705         unsigned int tx_expand_skb_head;
 706         unsigned int tx_expand_skb_head_cloned;
 707         unsigned int rx_expand_skb_head;
 708         unsigned int rx_expand_skb_head2;
 709         unsigned int rx_handlers_fragments;
 710         unsigned int tx_status_drop;
 711         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 712         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 713 #define I802_DEBUG_INC(c) (c)++
 714 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 715 #define I802_DEBUG_INC(c) do { } while (0)
 716 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 717
 718
 719         int total_ps_buffered; /* total number of all buffered unicast and
 720                                 * multicast packets for power saving stations
 721                                 */
 722         int wifi_wme_noack_test;
 723         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 724
 725 #ifdef CONFIG_MAC80211_DEBUGFS
 726         struct local_debugfsdentries {
 727                 struct dentry *frequency;
 728                 struct dentry *antenna_sel_tx;
 729                 struct dentry *antenna_sel_rx;
 730                 struct dentry *bridge_packets;
 731                 struct dentry *rts_threshold;
 732                 struct dentry *fragmentation_threshold;
 733                 struct dentry *short_retry_limit;
 734                 struct dentry *long_retry_limit;
 735                 struct dentry *total_ps_buffered;
 736                 struct dentry *wep_iv;
 737                 struct dentry *statistics;
 738                 struct local_debugfsdentries_statsdentries {
 739                         struct dentry *transmitted_fragment_count;
 740                         struct dentry *multicast_transmitted_frame_count;
 741                         struct dentry *failed_count;
 742                         struct dentry *retry_count;
 743                         struct dentry *multiple_retry_count;
 744                         struct dentry *frame_duplicate_count;
 745                         struct dentry *received_fragment_count;
 746                         struct dentry *multicast_received_frame_count;
 747                         struct dentry *transmitted_frame_count;
 748                         struct dentry *wep_undecryptable_count;
 749                         struct dentry *num_scans;
 750 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 751                         struct dentry *tx_handlers_drop;
 752                         struct dentry *tx_handlers_queued;
 753                         struct dentry *tx_handlers_drop_unencrypted;
 754                         struct dentry *tx_handlers_drop_fragment;
 755                         struct dentry *tx_handlers_drop_wep;
 756                         struct dentry *tx_handlers_drop_not_assoc;
 757                         struct dentry *tx_handlers_drop_unauth_port;
 758                         struct dentry *rx_handlers_drop;
 759                         struct dentry *rx_handlers_queued;
 760                         struct dentry *rx_handlers_drop_nullfunc;
 761                         struct dentry *rx_handlers_drop_defrag;
 762                         struct dentry *rx_handlers_drop_short;
 763                         struct dentry *rx_handlers_drop_passive_scan;
 764                         struct dentry *tx_expand_skb_head;
 765                         struct dentry *tx_expand_skb_head_cloned;
 766                         struct dentry *rx_expand_skb_head;
 767                         struct dentry *rx_expand_skb_head2;
 768                         struct dentry *rx_handlers_fragments;
 769                         struct dentry *tx_status_drop;
 770                         struct dentry *wme_tx_queue;
 771                         struct dentry *wme_rx_queue;
 772 #endif
 773                         struct dentry *dot11ACKFailureCount;
 774                         struct dentry *dot11RTSFailureCount;
 775                         struct dentry *dot11FCSErrorCount;
 776                         struct dentry *dot11RTSSuccessCount;
 777                 } stats;
 778                 struct dentry *stations;
 779                 struct dentry *keys;
 780         } debugfs;
 781 #endif
 782 };
 783
 784 /* this struct represents 802.11n's RA/TID combination */
 785 struct ieee80211_ra_tid {
 786         u8 ra[ETH_ALEN];
 787         u16 tid;
 788 };
 789
 790 /* Parsed Information Elements */
 791 struct ieee802_11_elems {
 792         /* pointers to IEs */
 793         u8 *ssid;
 794         u8 *supp_rates;
 795         u8 *fh_params;
 796         u8 *ds_params;
 797         u8 *cf_params;
 798         u8 *tim;
 799         u8 *ibss_params;
 800         u8 *challenge;
 801         u8 *wpa;
 802         u8 *rsn;
 803         u8 *erp_info;
 804         u8 *ext_supp_rates;
 805         u8 *wmm_info;
 806         u8 *wmm_param;
 807         u8 *ht_cap_elem;
 808         u8 *ht_info_elem;
 809         u8 *mesh_config;
 810         u8 *mesh_id;
 811         u8 *peer_link;
 812         u8 *preq;
 813         u8 *prep;
 814         u8 *perr;
 815
 816         /* length of them, respectively */
 817         u8 ssid_len;
 818         u8 supp_rates_len;
 819         u8 fh_params_len;
 820         u8 ds_params_len;
 821         u8 cf_params_len;
 822         u8 tim_len;
 823         u8 ibss_params_len;
 824         u8 challenge_len;
 825         u8 wpa_len;
 826         u8 rsn_len;
 827         u8 erp_info_len;
 828         u8 ext_supp_rates_len;
 829         u8 wmm_info_len;
 830         u8 wmm_param_len;
 831         u8 ht_cap_elem_len;
 832         u8 ht_info_elem_len;
 833         u8 mesh_config_len;
 834         u8 mesh_id_len;
 835         u8 peer_link_len;
 836         u8 preq_len;
 837         u8 prep_len;
 838         u8 perr_len;
 839 };
 840
 841 static inline struct ieee80211_local *hw_to_local(
 842         struct ieee80211_hw *hw)
 843 {
 844         return container_of(hw, struct ieee80211_local, hw);
 845 }
 846
 847 static inline struct ieee80211_hw *local_to_hw(
 848         struct ieee80211_local *local)
 849 {
 850         return &local->hw;
 851 }
 852
 853 enum ieee80211_link_state_t {
 854         IEEE80211_LINK_STATE_XOFF = 0,
 855         IEEE80211_LINK_STATE_PENDING,
 856 };
 857
 858 struct sta_attribute {
 859         struct attribute attr;
 860         ssize_t (*show)(const struct sta_info *, char *buf);
 861         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 862 };
 863
 864 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 865 {
 866         return compare_ether_addr(raddr, addr) == 0 ||
 867                is_broadcast_ether_addr(raddr);
 868 }
 869
 870
 871 /* ieee80211.c */
 872 int ieee80211_hw_config(struct ieee80211_local *local);
 873 int ieee80211_if_config(struct net_device *dev);
 874 int ieee80211_if_config_beacon(struct net_device *dev);
 875 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 876 void ieee80211_if_setup(struct net_device *dev);
 877 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 878                            struct ieee80211_ht_info *req_ht_cap,
 879                            struct ieee80211_ht_bss_info *req_bss_cap);
 880
 881 /* ieee80211_ioctl.c */
 882 extern const struct iw_handler_def ieee80211_iw_handler_def;
 883
 884
 885 /* Least common multiple of the used rates (in 100 kbps). This is used to
 886  * calculate rate_inv values for each rate so that only integers are needed. */
 887 #define CHAN_UTIL_RATE_LCM 95040
 888 /* 1 usec is 1/8 * (95040/10) = 1188 */
 889 #define CHAN_UTIL_PER_USEC 1188
 890 /* Amount of bits to shift the result right to scale the total utilization
 891  * to values that will not wrap around 32-bit integers. */
 892 #define CHAN_UTIL_SHIFT 9
 893 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 894  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 895  * raw value with about 23 should give utilization in 10th of a percentage
 896  * (1/1000). However, utilization is only estimated and not all intervals
 897  * between frames etc. are calculated. 18 seems to give numbers that are closer
 898  * to the real maximum. */
 899 #define CHAN_UTIL_PER_10MS 18
 900 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 901 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 902
 903
 904 /* ieee80211_ioctl.c */
 905 int ieee80211_set_compression(struct ieee80211_local *local,
 906                               struct net_device *dev, struct sta_info *sta);
 907 int ieee80211_set_freq(struct ieee80211_local *local, int freq);
 908 /* ieee80211_sta.c */
 909 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
 910 void ieee80211_sta_timer(unsigned long data);
 911 void ieee80211_sta_work(struct work_struct *work);
 912 void ieee80211_sta_scan_work(struct work_struct *work);
 913 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 914                            struct ieee80211_rx_status *rx_status);
 915 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 916 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 917 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 918 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 919 void ieee80211_sta_req_auth(struct net_device *dev,
 920                             struct ieee80211_if_sta *ifsta);
 921 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 922 ieee80211_rx_result ieee80211_sta_rx_scan(
 923         struct net_device *dev, struct sk_buff *skb,
 924         struct ieee80211_rx_status *rx_status);
 925 void ieee80211_rx_bss_list_init(struct net_device *dev);
 926 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 927 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 928 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 929                                          struct sk_buff *skb, u8 *bssid,
 930                                          u8 *addr);
 931 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 932 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 933 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 934                                       u32 changed);
 935 void ieee80211_reset_erp_info(struct net_device *dev);
 936 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 937                                    struct ieee80211_ht_info *ht_info);
 938 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 939                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 940                         struct ieee80211_ht_bss_info *bss_info);
 941 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
 942                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 943                                   u16 agg_size, u16 timeout);
 944 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
 945                                 u16 initiator, u16 reason_code);
 946
 947 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
 948                                 u16 tid, u16 initiator, u16 reason);
 949 void sta_rx_agg_session_timer_expired(unsigned long data);
 950 void sta_addba_resp_timer_expired(unsigned long data);
 951 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
 952 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 953                             struct ieee802_11_elems *elems,
 954                             enum ieee80211_band band);
 955 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 956                 int encrypt);
 957 void ieee802_11_parse_elems(u8 *start, size_t len,
 958                                    struct ieee802_11_elems *elems);
 959
 960 #ifdef CONFIG_MAC80211_MESH
 961 void ieee80211_start_mesh(struct net_device *dev);
 962 #else
 963 static inline void ieee80211_start_mesh(struct net_device *dev)
 964 {}
 965 #endif
 966
 967 /* ieee80211_iface.c */
 968 int ieee80211_if_add(struct net_device *dev, const char *name,
 969                      struct net_device **new_dev, int type,
 970                      struct vif_params *params);
 971 void ieee80211_if_set_type(struct net_device *dev, int type);
 972 void ieee80211_if_reinit(struct net_device *dev);
 973 void __ieee80211_if_del(struct ieee80211_local *local,
 974                         struct ieee80211_sub_if_data *sdata);
 975 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 976 void ieee80211_if_free(struct net_device *dev);
 977 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 978
 979 /* tx handling */
 980 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 981 void ieee80211_tx_pending(unsigned long data);
 982 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 983 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 984 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 985
 986 /* utility functions/constants */
 987 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 988 extern const unsigned char rfc1042_header[6];
 989 extern const unsigned char bridge_tunnel_header[6];
 990 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 991                         enum ieee80211_if_types type);
 992 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 993                              int rate, int erp, int short_preamble);
 994 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 995                                      struct ieee80211_hdr *hdr);
 996
 997 #endif /* IEEE80211_I_H */