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 #define IEEE80211_FC(type, subtype) cpu_to_le16(type | subtype)
  39
  40 struct ieee80211_local;
  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
  73 struct ieee80211_sta_bss {
  74         struct list_head list;
  75         struct ieee80211_sta_bss *hnext;
  76         size_t ssid_len;
  77
  78         atomic_t users;
  79
  80         u8 bssid[ETH_ALEN];
  81         u8 ssid[IEEE80211_MAX_SSID_LEN];
  82         u16 capability; /* host byte order */
  83         enum ieee80211_band band;
  84         int freq;
  85         int rssi, signal, noise;
  86         u8 *wpa_ie;
  87         size_t wpa_ie_len;
  88         u8 *rsn_ie;
  89         size_t rsn_ie_len;
  90         u8 *wmm_ie;
  91         size_t wmm_ie_len;
  92         u8 *ht_ie;
  93         size_t ht_ie_len;
  94 #ifdef CONFIG_MAC80211_MESH
  95         u8 *mesh_id;
  96         size_t mesh_id_len;
  97         u8 *mesh_cfg;
  98 #endif
  99 #define IEEE80211_MAX_SUPP_RATES 32
 100         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 101         size_t supp_rates_len;
 102         u64 timestamp;
 103         int beacon_int;
 104
 105         int probe_resp;
 106         unsigned long last_update;
 107
 108         /* during assocation, we save an ERP value from a probe response so
 109          * that we can feed ERP info to the driver when handling the
 110          * association completes. these fields probably won't be up-to-date
 111          * otherwise, you probably don't want to use them. */
 112         int has_erp_value;
 113         u8 erp_value;
 114 };
 115
 116 static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
 117 {
 118 #ifdef CONFIG_MAC80211_MESH
 119         return bss->mesh_cfg;
 120 #endif
 121         return NULL;
 122 }
 123
 124 static inline u8 *bss_mesh_id(struct ieee80211_sta_bss *bss)
 125 {
 126 #ifdef CONFIG_MAC80211_MESH
 127         return bss->mesh_id;
 128 #endif
 129         return NULL;
 130 }
 131
 132 static inline u8 bss_mesh_id_len(struct ieee80211_sta_bss *bss)
 133 {
 134 #ifdef CONFIG_MAC80211_MESH
 135         return bss->mesh_id_len;
 136 #endif
 137         return 0;
 138 }
 139
 140
 141 typedef unsigned __bitwise__ ieee80211_tx_result;
 142 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 143 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 144 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 145
 146 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 147 #define IEEE80211_TX_UNICAST            BIT(1)
 148 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 149 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 150 #define IEEE80211_TX_INJECTED           BIT(4)
 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_tx_control *control;
 161         struct ieee80211_channel *channel;
 162         struct ieee80211_rate *rate;
 163         /* use this rate (if set) for last fragment; rate can
 164          * be set to lower rate for the first fragments, e.g.,
 165          * when using CTS protection with IEEE 802.11g. */
 166         struct ieee80211_rate *last_frag_rate;
 167
 168         /* Extra fragments (in addition to the first fragment
 169          * in skb) */
 170         struct sk_buff **extra_frag;
 171         int num_extra_frag;
 172
 173         u16 fc, ethertype;
 174         unsigned int flags;
 175 };
 176
 177
 178 typedef unsigned __bitwise__ ieee80211_rx_result;
 179 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 180 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 181 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 182 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 183
 184 #define IEEE80211_RX_IN_SCAN            BIT(0)
 185 /* frame is destined to interface currently processed (incl. multicast frames) */
 186 #define IEEE80211_RX_RA_MATCH           BIT(1)
 187 #define IEEE80211_RX_AMSDU              BIT(2)
 188 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 189 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 190
 191 struct ieee80211_rx_data {
 192         struct sk_buff *skb;
 193         struct net_device *dev;
 194         struct ieee80211_local *local;
 195         struct ieee80211_sub_if_data *sdata;
 196         struct sta_info *sta;
 197         struct ieee80211_key *key;
 198         struct ieee80211_rx_status *status;
 199         struct ieee80211_rate *rate;
 200
 201         u16 fc, ethertype;
 202         unsigned int flags;
 203         int sent_ps_buffered;
 204         int queue;
 205         int load;
 206         u32 tkip_iv32;
 207         u16 tkip_iv16;
 208 };
 209
 210 /* flags used in struct ieee80211_tx_packet_data.flags */
 211 #define IEEE80211_TXPD_REQ_TX_STATUS    BIT(0)
 212 #define IEEE80211_TXPD_DO_NOT_ENCRYPT   BIT(1)
 213 #define IEEE80211_TXPD_REQUEUE          BIT(2)
 214 #define IEEE80211_TXPD_EAPOL_FRAME      BIT(3)
 215 #define IEEE80211_TXPD_AMPDU            BIT(4)
 216 /* Stored in sk_buff->cb */
 217 struct ieee80211_tx_packet_data {
 218         int ifindex;
 219         unsigned long jiffies;
 220         unsigned int flags;
 221         u8 queue;
 222 };
 223
 224 struct ieee80211_tx_stored_packet {
 225         struct ieee80211_tx_control control;
 226         struct sk_buff *skb;
 227         struct sk_buff **extra_frag;
 228         struct ieee80211_rate *last_frag_rate;
 229         int num_extra_frag;
 230         unsigned int last_frag_rate_ctrl_probe;
 231 };
 232
 233 struct beacon_data {
 234         u8 *head, *tail;
 235         int head_len, tail_len;
 236         int dtim_period;
 237 };
 238
 239 struct ieee80211_if_ap {
 240         struct beacon_data *beacon;
 241
 242         struct list_head vlans;
 243
 244         u8 ssid[IEEE80211_MAX_SSID_LEN];
 245         size_t ssid_len;
 246
 247         /* yes, this looks ugly, but guarantees that we can later use
 248          * bitmap_empty :)
 249          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 250         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 251         struct sk_buff_head ps_bc_buf;
 252         atomic_t num_sta_ps; /* number of stations in PS mode */
 253         int dtim_count;
 254         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 255         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 256         int num_beacons; /* number of TXed beacon frames for this BSS */
 257 };
 258
 259 struct ieee80211_if_wds {
 260         struct sta_info *sta;
 261         u8 remote_addr[ETH_ALEN];
 262 };
 263
 264 struct ieee80211_if_vlan {
 265         struct ieee80211_sub_if_data *ap;
 266         struct list_head list;
 267 };
 268
 269 struct mesh_stats {
 270         __u32 fwded_frames;             /* Mesh forwarded frames */
 271         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 272         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 273         atomic_t estab_plinks;
 274 };
 275
 276 #define PREQ_Q_F_START          0x1
 277 #define PREQ_Q_F_REFRESH        0x2
 278 struct mesh_preq_queue {
 279         struct list_head list;
 280         u8 dst[ETH_ALEN];
 281         u8 flags;
 282 };
 283
 284 struct mesh_config {
 285         /* Timeouts in ms */
 286         /* Mesh plink management parameters */
 287         u16 dot11MeshRetryTimeout;
 288         u16 dot11MeshConfirmTimeout;
 289         u16 dot11MeshHoldingTimeout;
 290         u16 dot11MeshMaxPeerLinks;
 291         u8  dot11MeshMaxRetries;
 292         u8  dot11MeshTTL;
 293         bool auto_open_plinks;
 294         /* HWMP parameters */
 295         u8  dot11MeshHWMPmaxPREQretries;
 296         u32 path_refresh_time;
 297         u16 min_discovery_timeout;
 298         u32 dot11MeshHWMPactivePathTimeout;
 299         u16 dot11MeshHWMPpreqMinInterval;
 300         u16 dot11MeshHWMPnetDiameterTraversalTime;
 301 };
 302
 303
 304 /* flags used in struct ieee80211_if_sta.flags */
 305 #define IEEE80211_STA_SSID_SET          BIT(0)
 306 #define IEEE80211_STA_BSSID_SET         BIT(1)
 307 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 308 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 309 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 310 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 311 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 312 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 313 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 314 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 315 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 316 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 317 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 318 struct ieee80211_if_sta {
 319         struct timer_list timer;
 320         struct work_struct work;
 321         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 322         u8 ssid[IEEE80211_MAX_SSID_LEN];
 323         enum {
 324                 IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
 325                 IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
 326                 IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED,
 327                 IEEE80211_MESH_UP
 328         } state;
 329         size_t ssid_len;
 330         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 331         size_t scan_ssid_len;
 332 #ifdef CONFIG_MAC80211_MESH
 333         struct timer_list mesh_path_timer;
 334         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 335         size_t mesh_id_len;
 336         /* Active Path Selection Protocol Identifier */
 337         u8 mesh_pp_id[4];
 338         /* Active Path Selection Metric Identifier */
 339         u8 mesh_pm_id[4];
 340         /* Congestion Control Mode Identifier */
 341         u8 mesh_cc_id[4];
 342         /* Local mesh Destination Sequence Number */
 343         u32 dsn;
 344         /* Last used PREQ ID */
 345         u32 preq_id;
 346         atomic_t mpaths;
 347         /* Timestamp of last DSN update */
 348         unsigned long last_dsn_update;
 349         /* Timestamp of last DSN sent */
 350         unsigned long last_preq;
 351         struct mesh_rmc *rmc;
 352         spinlock_t mesh_preq_queue_lock;
 353         struct mesh_preq_queue preq_queue;
 354         int preq_queue_len;
 355         struct mesh_stats mshstats;
 356         struct mesh_config mshcfg;
 357         u8 mesh_seqnum[3];
 358         bool accepting_plinks;
 359 #endif
 360         u16 aid;
 361         u16 ap_capab, capab;
 362         u8 *extra_ie; /* to be added to the end of AssocReq */
 363         size_t extra_ie_len;
 364
 365         /* The last AssocReq/Resp IEs */
 366         u8 *assocreq_ies, *assocresp_ies;
 367         size_t assocreq_ies_len, assocresp_ies_len;
 368
 369         struct sk_buff_head skb_queue;
 370
 371         int auth_tries, assoc_tries;
 372
 373         unsigned long request;
 374
 375         unsigned long last_probe;
 376
 377         unsigned int flags;
 378 #define IEEE80211_STA_REQ_SCAN 0
 379 #define IEEE80211_STA_REQ_AUTH 1
 380 #define IEEE80211_STA_REQ_RUN  2
 381
 382 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 383 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 384 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 385         unsigned int auth_algs; /* bitfield of allowed auth algs */
 386         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 387         int auth_transaction;
 388
 389         unsigned long ibss_join_req;
 390         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 391         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 392
 393         int wmm_last_param_set;
 394         int num_beacons; /* number of TXed beacon frames by this STA */
 395 };
 396
 397 static inline void ieee80211_if_sta_set_mesh_id(struct ieee80211_if_sta *ifsta,
 398                                                 u8 mesh_id_len, u8 *mesh_id)
 399 {
 400 #ifdef CONFIG_MAC80211_MESH
 401         ifsta->mesh_id_len = mesh_id_len;
 402         memcpy(ifsta->mesh_id, mesh_id, mesh_id_len);
 403 #endif
 404 }
 405
 406 #ifdef CONFIG_MAC80211_MESH
 407 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 408         do { (sta)->mshstats.name++; } while (0)
 409 #else
 410 #define IEEE80211_IFSTA_MESH_CTR_INC(sta, name) \
 411         do { } while (0)
 412 #endif
 413
 414 /* flags used in struct ieee80211_sub_if_data.flags */
 415 #define IEEE80211_SDATA_ALLMULTI        BIT(0)
 416 #define IEEE80211_SDATA_PROMISC         BIT(1)
 417 #define IEEE80211_SDATA_USERSPACE_MLME  BIT(2)
 418 #define IEEE80211_SDATA_OPERATING_GMODE BIT(3)
 419 struct ieee80211_sub_if_data {
 420         struct list_head list;
 421
 422         struct wireless_dev wdev;
 423
 424         /* keys */
 425         struct list_head key_list;
 426
 427         struct net_device *dev;
 428         struct ieee80211_local *local;
 429
 430         unsigned int flags;
 431
 432         int drop_unencrypted;
 433
 434         /*
 435          * basic rates of this AP or the AP we're associated to
 436          */
 437         u64 basic_rates;
 438
 439         u16 sequence;
 440
 441         /* Fragment table for host-based reassembly */
 442         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 443         unsigned int fragment_next;
 444
 445 #define NUM_DEFAULT_KEYS 4
 446         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 447         struct ieee80211_key *default_key;
 448
 449         /*
 450          * BSS configuration for this interface.
 451          *
 452          * FIXME: I feel bad putting this here when we already have a
 453          *        bss pointer, but the bss pointer is just wrong when
 454          *        you have multiple virtual STA mode interfaces...
 455          *        This needs to be fixed.
 456          */
 457         struct ieee80211_bss_conf bss_conf;
 458         struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
 459
 460         union {
 461                 struct ieee80211_if_ap ap;
 462                 struct ieee80211_if_wds wds;
 463                 struct ieee80211_if_vlan vlan;
 464                 struct ieee80211_if_sta sta;
 465                 u32 mntr_flags;
 466         } u;
 467         int channel_use;
 468         int channel_use_raw;
 469
 470 #ifdef CONFIG_MAC80211_DEBUGFS
 471         struct dentry *debugfsdir;
 472         union {
 473                 struct {
 474                         struct dentry *channel_use;
 475                         struct dentry *drop_unencrypted;
 476                         struct dentry *state;
 477                         struct dentry *bssid;
 478                         struct dentry *prev_bssid;
 479                         struct dentry *ssid_len;
 480                         struct dentry *aid;
 481                         struct dentry *ap_capab;
 482                         struct dentry *capab;
 483                         struct dentry *extra_ie_len;
 484                         struct dentry *auth_tries;
 485                         struct dentry *assoc_tries;
 486                         struct dentry *auth_algs;
 487                         struct dentry *auth_alg;
 488                         struct dentry *auth_transaction;
 489                         struct dentry *flags;
 490                         struct dentry *num_beacons_sta;
 491                 } sta;
 492                 struct {
 493                         struct dentry *channel_use;
 494                         struct dentry *drop_unencrypted;
 495                         struct dentry *num_sta_ps;
 496                         struct dentry *dtim_count;
 497                         struct dentry *num_beacons;
 498                         struct dentry *force_unicast_rateidx;
 499                         struct dentry *max_ratectrl_rateidx;
 500                         struct dentry *num_buffered_multicast;
 501                 } ap;
 502                 struct {
 503                         struct dentry *channel_use;
 504                         struct dentry *drop_unencrypted;
 505                         struct dentry *peer;
 506                 } wds;
 507                 struct {
 508                         struct dentry *channel_use;
 509                         struct dentry *drop_unencrypted;
 510                 } vlan;
 511                 struct {
 512                         struct dentry *mode;
 513                 } monitor;
 514                 struct dentry *default_key;
 515         } debugfs;
 516
 517 #ifdef CONFIG_MAC80211_MESH
 518         struct dentry *mesh_stats_dir;
 519         struct {
 520                 struct dentry *fwded_frames;
 521                 struct dentry *dropped_frames_ttl;
 522                 struct dentry *dropped_frames_no_route;
 523                 struct dentry *estab_plinks;
 524                 struct timer_list mesh_path_timer;
 525         } mesh_stats;
 526
 527         struct dentry *mesh_config_dir;
 528         struct {
 529                 struct dentry *dot11MeshRetryTimeout;
 530                 struct dentry *dot11MeshConfirmTimeout;
 531                 struct dentry *dot11MeshHoldingTimeout;
 532                 struct dentry *dot11MeshMaxRetries;
 533                 struct dentry *dot11MeshTTL;
 534                 struct dentry *auto_open_plinks;
 535                 struct dentry *dot11MeshMaxPeerLinks;
 536                 struct dentry *dot11MeshHWMPactivePathTimeout;
 537                 struct dentry *dot11MeshHWMPpreqMinInterval;
 538                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 539                 struct dentry *dot11MeshHWMPmaxPREQretries;
 540                 struct dentry *path_refresh_time;
 541                 struct dentry *min_discovery_timeout;
 542         } mesh_config;
 543 #endif
 544
 545 #endif
 546         /* must be last, dynamically sized area in this! */
 547         struct ieee80211_vif vif;
 548 };
 549
 550 static inline
 551 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 552 {
 553         return container_of(p, struct ieee80211_sub_if_data, vif);
 554 }
 555
 556 #define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
 557
 558 enum {
 559         IEEE80211_RX_MSG        = 1,
 560         IEEE80211_TX_STATUS_MSG = 2,
 561         IEEE80211_DELBA_MSG     = 3,
 562         IEEE80211_ADDBA_MSG     = 4,
 563 };
 564
 565 struct ieee80211_local {
 566         /* embed the driver visible part.
 567          * don't cast (use the static inlines below), but we keep
 568          * it first anyway so they become a no-op */
 569         struct ieee80211_hw hw;
 570
 571         const struct ieee80211_ops *ops;
 572
 573         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 574         int open_count;
 575         int monitors, cooked_mntrs;
 576         /* number of interfaces with corresponding FIF_ flags */
 577         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 578         unsigned int filter_flags; /* FIF_* */
 579         struct iw_statistics wstats;
 580         u8 wstats_flags;
 581         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 582         int tx_headroom; /* required headroom for hardware/radiotap */
 583
 584         enum {
 585                 IEEE80211_DEV_UNINITIALIZED = 0,
 586                 IEEE80211_DEV_REGISTERED,
 587                 IEEE80211_DEV_UNREGISTERED,
 588         } reg_state;
 589
 590         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 591          * added to skb_queue will be processed, but frames in
 592          * skb_queue_unreliable may be dropped if the total length of these
 593          * queues increases over the limit. */
 594 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 595         struct tasklet_struct tasklet;
 596         struct sk_buff_head skb_queue;
 597         struct sk_buff_head skb_queue_unreliable;
 598
 599         /* Station data */
 600         /*
 601          * The lock only protects the list, hash, timer and counter
 602          * against manipulation, reads are done in RCU. Additionally,
 603          * the lock protects each BSS's TIM bitmap, a few items in
 604          * STA info structures and various key pointers.
 605          */
 606         spinlock_t sta_lock;
 607         unsigned long num_sta;
 608         struct list_head sta_list;
 609         struct list_head sta_flush_list;
 610         struct work_struct sta_flush_work;
 611         struct sta_info *sta_hash[STA_HASH_SIZE];
 612         struct timer_list sta_cleanup;
 613
 614         unsigned long state[NUM_TX_DATA_QUEUES_AMPDU];
 615         struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES_AMPDU];
 616         struct tasklet_struct tx_pending_tasklet;
 617
 618         /* number of interfaces with corresponding IFF_ flags */
 619         atomic_t iff_allmultis, iff_promiscs;
 620
 621         struct rate_control_ref *rate_ctrl;
 622
 623         int rts_threshold;
 624         int fragmentation_threshold;
 625         int short_retry_limit; /* dot11ShortRetryLimit */
 626         int long_retry_limit; /* dot11LongRetryLimit */
 627
 628         struct crypto_blkcipher *wep_tx_tfm;
 629         struct crypto_blkcipher *wep_rx_tfm;
 630         u32 wep_iv;
 631
 632         int bridge_packets; /* bridge packets between associated stations and
 633                              * deliver multicast frames both back to wireless
 634                              * media and to the local net stack */
 635
 636         struct list_head interfaces;
 637
 638         bool sta_sw_scanning;
 639         bool sta_hw_scanning;
 640         int scan_channel_idx;
 641         enum ieee80211_band scan_band;
 642
 643         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 644         unsigned long last_scan_completed;
 645         struct delayed_work scan_work;
 646         struct net_device *scan_dev;
 647         struct ieee80211_channel *oper_channel, *scan_channel;
 648         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 649         size_t scan_ssid_len;
 650         struct list_head sta_bss_list;
 651         struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
 652         spinlock_t sta_bss_lock;
 653
 654         /* SNMP counters */
 655         /* dot11CountersTable */
 656         u32 dot11TransmittedFragmentCount;
 657         u32 dot11MulticastTransmittedFrameCount;
 658         u32 dot11FailedCount;
 659         u32 dot11RetryCount;
 660         u32 dot11MultipleRetryCount;
 661         u32 dot11FrameDuplicateCount;
 662         u32 dot11ReceivedFragmentCount;
 663         u32 dot11MulticastReceivedFrameCount;
 664         u32 dot11TransmittedFrameCount;
 665         u32 dot11WEPUndecryptableCount;
 666
 667 #ifdef CONFIG_MAC80211_LEDS
 668         int tx_led_counter, rx_led_counter;
 669         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 670         char tx_led_name[32], rx_led_name[32],
 671              assoc_led_name[32], radio_led_name[32];
 672 #endif
 673
 674         u32 channel_use;
 675         u32 channel_use_raw;
 676
 677 #ifdef CONFIG_MAC80211_DEBUGFS
 678         struct work_struct sta_debugfs_add;
 679 #endif
 680
 681 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 682         /* TX/RX handler statistics */
 683         unsigned int tx_handlers_drop;
 684         unsigned int tx_handlers_queued;
 685         unsigned int tx_handlers_drop_unencrypted;
 686         unsigned int tx_handlers_drop_fragment;
 687         unsigned int tx_handlers_drop_wep;
 688         unsigned int tx_handlers_drop_not_assoc;
 689         unsigned int tx_handlers_drop_unauth_port;
 690         unsigned int rx_handlers_drop;
 691         unsigned int rx_handlers_queued;
 692         unsigned int rx_handlers_drop_nullfunc;
 693         unsigned int rx_handlers_drop_defrag;
 694         unsigned int rx_handlers_drop_short;
 695         unsigned int rx_handlers_drop_passive_scan;
 696         unsigned int tx_expand_skb_head;
 697         unsigned int tx_expand_skb_head_cloned;
 698         unsigned int rx_expand_skb_head;
 699         unsigned int rx_expand_skb_head2;
 700         unsigned int rx_handlers_fragments;
 701         unsigned int tx_status_drop;
 702         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 703         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 704 #define I802_DEBUG_INC(c) (c)++
 705 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 706 #define I802_DEBUG_INC(c) do { } while (0)
 707 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 708
 709
 710         int total_ps_buffered; /* total number of all buffered unicast and
 711                                 * multicast packets for power saving stations
 712                                 */
 713         int wifi_wme_noack_test;
 714         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 715
 716 #ifdef CONFIG_MAC80211_DEBUGFS
 717         struct local_debugfsdentries {
 718                 struct dentry *frequency;
 719                 struct dentry *antenna_sel_tx;
 720                 struct dentry *antenna_sel_rx;
 721                 struct dentry *bridge_packets;
 722                 struct dentry *rts_threshold;
 723                 struct dentry *fragmentation_threshold;
 724                 struct dentry *short_retry_limit;
 725                 struct dentry *long_retry_limit;
 726                 struct dentry *total_ps_buffered;
 727                 struct dentry *wep_iv;
 728                 struct dentry *statistics;
 729                 struct local_debugfsdentries_statsdentries {
 730                         struct dentry *transmitted_fragment_count;
 731                         struct dentry *multicast_transmitted_frame_count;
 732                         struct dentry *failed_count;
 733                         struct dentry *retry_count;
 734                         struct dentry *multiple_retry_count;
 735                         struct dentry *frame_duplicate_count;
 736                         struct dentry *received_fragment_count;
 737                         struct dentry *multicast_received_frame_count;
 738                         struct dentry *transmitted_frame_count;
 739                         struct dentry *wep_undecryptable_count;
 740                         struct dentry *num_scans;
 741 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 742                         struct dentry *tx_handlers_drop;
 743                         struct dentry *tx_handlers_queued;
 744                         struct dentry *tx_handlers_drop_unencrypted;
 745                         struct dentry *tx_handlers_drop_fragment;
 746                         struct dentry *tx_handlers_drop_wep;
 747                         struct dentry *tx_handlers_drop_not_assoc;
 748                         struct dentry *tx_handlers_drop_unauth_port;
 749                         struct dentry *rx_handlers_drop;
 750                         struct dentry *rx_handlers_queued;
 751                         struct dentry *rx_handlers_drop_nullfunc;
 752                         struct dentry *rx_handlers_drop_defrag;
 753                         struct dentry *rx_handlers_drop_short;
 754                         struct dentry *rx_handlers_drop_passive_scan;
 755                         struct dentry *tx_expand_skb_head;
 756                         struct dentry *tx_expand_skb_head_cloned;
 757                         struct dentry *rx_expand_skb_head;
 758                         struct dentry *rx_expand_skb_head2;
 759                         struct dentry *rx_handlers_fragments;
 760                         struct dentry *tx_status_drop;
 761                         struct dentry *wme_tx_queue;
 762                         struct dentry *wme_rx_queue;
 763 #endif
 764                         struct dentry *dot11ACKFailureCount;
 765                         struct dentry *dot11RTSFailureCount;
 766                         struct dentry *dot11FCSErrorCount;
 767                         struct dentry *dot11RTSSuccessCount;
 768                 } stats;
 769                 struct dentry *stations;
 770                 struct dentry *keys;
 771         } debugfs;
 772 #endif
 773 };
 774
 775 /* this struct represents 802.11n's RA/TID combination */
 776 struct ieee80211_ra_tid {
 777         u8 ra[ETH_ALEN];
 778         u16 tid;
 779 };
 780
 781 /* Parsed Information Elements */
 782 struct ieee802_11_elems {
 783         /* pointers to IEs */
 784         u8 *ssid;
 785         u8 *supp_rates;
 786         u8 *fh_params;
 787         u8 *ds_params;
 788         u8 *cf_params;
 789         u8 *tim;
 790         u8 *ibss_params;
 791         u8 *challenge;
 792         u8 *wpa;
 793         u8 *rsn;
 794         u8 *erp_info;
 795         u8 *ext_supp_rates;
 796         u8 *wmm_info;
 797         u8 *wmm_param;
 798         u8 *ht_cap_elem;
 799         u8 *ht_info_elem;
 800         u8 *mesh_config;
 801         u8 *mesh_id;
 802         u8 *peer_link;
 803         u8 *preq;
 804         u8 *prep;
 805         u8 *perr;
 806
 807         /* length of them, respectively */
 808         u8 ssid_len;
 809         u8 supp_rates_len;
 810         u8 fh_params_len;
 811         u8 ds_params_len;
 812         u8 cf_params_len;
 813         u8 tim_len;
 814         u8 ibss_params_len;
 815         u8 challenge_len;
 816         u8 wpa_len;
 817         u8 rsn_len;
 818         u8 erp_info_len;
 819         u8 ext_supp_rates_len;
 820         u8 wmm_info_len;
 821         u8 wmm_param_len;
 822         u8 ht_cap_elem_len;
 823         u8 ht_info_elem_len;
 824         u8 mesh_config_len;
 825         u8 mesh_id_len;
 826         u8 peer_link_len;
 827         u8 preq_len;
 828         u8 prep_len;
 829         u8 perr_len;
 830 };
 831
 832 static inline struct ieee80211_local *hw_to_local(
 833         struct ieee80211_hw *hw)
 834 {
 835         return container_of(hw, struct ieee80211_local, hw);
 836 }
 837
 838 static inline struct ieee80211_hw *local_to_hw(
 839         struct ieee80211_local *local)
 840 {
 841         return &local->hw;
 842 }
 843
 844 enum ieee80211_link_state_t {
 845         IEEE80211_LINK_STATE_XOFF = 0,
 846         IEEE80211_LINK_STATE_PENDING,
 847 };
 848
 849 struct sta_attribute {
 850         struct attribute attr;
 851         ssize_t (*show)(const struct sta_info *, char *buf);
 852         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 853 };
 854
 855 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 856 {
 857         return compare_ether_addr(raddr, addr) == 0 ||
 858                is_broadcast_ether_addr(raddr);
 859 }
 860
 861
 862 /* ieee80211.c */
 863 int ieee80211_hw_config(struct ieee80211_local *local);
 864 int ieee80211_if_config(struct net_device *dev);
 865 int ieee80211_if_config_beacon(struct net_device *dev);
 866 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 867 void ieee80211_if_setup(struct net_device *dev);
 868 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 869                         struct ieee80211_ht_info *req_ht_cap,
 870                         struct ieee80211_ht_bss_info *req_bss_cap);
 871
 872 /* ieee80211_ioctl.c */
 873 extern const struct iw_handler_def ieee80211_iw_handler_def;
 874
 875
 876 /* Least common multiple of the used rates (in 100 kbps). This is used to
 877  * calculate rate_inv values for each rate so that only integers are needed. */
 878 #define CHAN_UTIL_RATE_LCM 95040
 879 /* 1 usec is 1/8 * (95040/10) = 1188 */
 880 #define CHAN_UTIL_PER_USEC 1188
 881 /* Amount of bits to shift the result right to scale the total utilization
 882  * to values that will not wrap around 32-bit integers. */
 883 #define CHAN_UTIL_SHIFT 9
 884 /* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 885  * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 886  * raw value with about 23 should give utilization in 10th of a percentage
 887  * (1/1000). However, utilization is only estimated and not all intervals
 888  * between frames etc. are calculated. 18 seems to give numbers that are closer
 889  * to the real maximum. */
 890 #define CHAN_UTIL_PER_10MS 18
 891 #define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
 892 #define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)
 893
 894
 895 /* ieee80211_ioctl.c */
 896 int ieee80211_set_freq(struct ieee80211_local *local, int freq);
 897 /* ieee80211_sta.c */
 898 void ieee80211_sta_timer(unsigned long data);
 899 void ieee80211_sta_work(struct work_struct *work);
 900 void ieee80211_sta_scan_work(struct work_struct *work);
 901 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
 902                            struct ieee80211_rx_status *rx_status);
 903 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
 904 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
 905 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
 906 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
 907 void ieee80211_sta_req_auth(struct net_device *dev,
 908                             struct ieee80211_if_sta *ifsta);
 909 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
 910 ieee80211_rx_result ieee80211_sta_rx_scan(
 911         struct net_device *dev, struct sk_buff *skb,
 912         struct ieee80211_rx_status *rx_status);
 913 void ieee80211_rx_bss_list_init(struct net_device *dev);
 914 void ieee80211_rx_bss_list_deinit(struct net_device *dev);
 915 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
 916 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
 917                                          struct sk_buff *skb, u8 *bssid,
 918                                          u8 *addr);
 919 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
 920 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
 921 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 922                                       u32 changed);
 923 void ieee80211_reset_erp_info(struct net_device *dev);
 924 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 925                                    struct ieee80211_ht_info *ht_info);
 926 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 927                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 928                         struct ieee80211_ht_bss_info *bss_info);
 929 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
 930                                   u16 tid, u8 dialog_token, u16 start_seq_num,
 931                                   u16 agg_size, u16 timeout);
 932 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
 933                                 u16 initiator, u16 reason_code);
 934
 935 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
 936                                 u16 tid, u16 initiator, u16 reason);
 937 void sta_rx_agg_session_timer_expired(unsigned long data);
 938 void sta_addba_resp_timer_expired(unsigned long data);
 939 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr);
 940 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 941                             struct ieee802_11_elems *elems,
 942                             enum ieee80211_band band);
 943 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
 944                 int encrypt);
 945 void ieee802_11_parse_elems(u8 *start, size_t len,
 946                                    struct ieee802_11_elems *elems);
 947
 948 #ifdef CONFIG_MAC80211_MESH
 949 void ieee80211_start_mesh(struct net_device *dev);
 950 #else
 951 static inline void ieee80211_start_mesh(struct net_device *dev)
 952 {}
 953 #endif
 954
 955 /* ieee80211_iface.c */
 956 int ieee80211_if_add(struct net_device *dev, const char *name,
 957                      struct net_device **new_dev, int type,
 958                      struct vif_params *params);
 959 void ieee80211_if_set_type(struct net_device *dev, int type);
 960 void ieee80211_if_reinit(struct net_device *dev);
 961 void __ieee80211_if_del(struct ieee80211_local *local,
 962                         struct ieee80211_sub_if_data *sdata);
 963 int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
 964 void ieee80211_if_free(struct net_device *dev);
 965 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
 966
 967 /* tx handling */
 968 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 969 void ieee80211_tx_pending(unsigned long data);
 970 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 971 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 972 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 973
 974 /* utility functions/constants */
 975 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 976 extern const unsigned char rfc1042_header[6];
 977 extern const unsigned char bridge_tunnel_header[6];
 978 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 979                         enum ieee80211_if_types type);
 980 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 981                              int rate, int erp, int short_preamble);
 982 void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
 983                                      struct ieee80211_hdr *hdr);
 984
 985 #endif /* IEEE80211_I_H */