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/cfg80211.h>
  27 #include <net/iw_handler.h>
  28 #include <net/mac80211.h>
  29 #include "key.h"
  30 #include "sta_info.h"
  31
  32 struct ieee80211_local;
  33
  34 /* Maximum number of broadcast/multicast frames to buffer when some of the
  35  * associated stations are using power saving. */
  36 #define AP_MAX_BC_BUFFER 128
  37
  38 /* Maximum number of frames buffered to all STAs, including multicast frames.
  39  * Note: increasing this limit increases the potential memory requirement. Each
  40  * frame can be up to about 2 kB long. */
  41 #define TOTAL_MAX_TX_BUFFER 512
  42
  43 /* Required encryption head and tailroom */
  44 #define IEEE80211_ENCRYPT_HEADROOM 8
  45 #define IEEE80211_ENCRYPT_TAILROOM 18
  46
  47 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  48  * reception of at least three fragmented frames. This limit can be increased
  49  * by changing this define, at the cost of slower frame reassembly and
  50  * increased memory use (about 2 kB of RAM per entry). */
  51 #define IEEE80211_FRAGMENT_MAX 4
  52
  53 /*
  54  * Time after which we ignore scan results and no longer report/use
  55  * them in any way.
  56  */
  57 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  58
  59 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  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_bss {
  74         /* Yes, this is a hack */
  75         struct cfg80211_bss cbss;
  76
  77         /* don't want to look up all the time */
  78         size_t ssid_len;
  79         u8 ssid[IEEE80211_MAX_SSID_LEN];
  80
  81         u8 dtim_period;
  82
  83         bool wmm_used;
  84
  85         unsigned long last_probe_resp;
  86
  87 #ifdef CONFIG_MAC80211_MESH
  88         u8 *mesh_id;
  89         size_t mesh_id_len;
  90         u8 *mesh_cfg;
  91 #endif
  92
  93 #define IEEE80211_MAX_SUPP_RATES 32
  94         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  95         size_t supp_rates_len;
  96
  97         /*
  98          * During assocation, we save an ERP value from a probe response so
  99          * that we can feed ERP info to the driver when handling the
 100          * association completes. these fields probably won't be up-to-date
 101          * otherwise, you probably don't want to use them.
 102          */
 103         bool has_erp_value;
 104         u8 erp_value;
 105 };
 106
 107 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 108 {
 109 #ifdef CONFIG_MAC80211_MESH
 110         return bss->mesh_cfg;
 111 #endif
 112         return NULL;
 113 }
 114
 115 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 116 {
 117 #ifdef CONFIG_MAC80211_MESH
 118         return bss->mesh_id;
 119 #endif
 120         return NULL;
 121 }
 122
 123 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 124 {
 125 #ifdef CONFIG_MAC80211_MESH
 126         return bss->mesh_id_len;
 127 #endif
 128         return 0;
 129 }
 130
 131
 132 typedef unsigned __bitwise__ ieee80211_tx_result;
 133 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 134 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 135 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 136
 137 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 138 #define IEEE80211_TX_UNICAST            BIT(1)
 139 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 140
 141 struct ieee80211_tx_data {
 142         struct sk_buff *skb;
 143         struct net_device *dev;
 144         struct ieee80211_local *local;
 145         struct ieee80211_sub_if_data *sdata;
 146         struct sta_info *sta;
 147         struct ieee80211_key *key;
 148
 149         struct ieee80211_channel *channel;
 150
 151         u16 ethertype;
 152         unsigned int flags;
 153 };
 154
 155
 156 typedef unsigned __bitwise__ ieee80211_rx_result;
 157 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 158 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 159 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 160 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 161
 162 #define IEEE80211_RX_IN_SCAN            BIT(0)
 163 /* frame is destined to interface currently processed (incl. multicast frames) */
 164 #define IEEE80211_RX_RA_MATCH           BIT(1)
 165 #define IEEE80211_RX_AMSDU              BIT(2)
 166 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 167 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 168
 169 struct ieee80211_rx_data {
 170         struct sk_buff *skb;
 171         struct net_device *dev;
 172         struct ieee80211_local *local;
 173         struct ieee80211_sub_if_data *sdata;
 174         struct sta_info *sta;
 175         struct ieee80211_key *key;
 176         struct ieee80211_rx_status *status;
 177         struct ieee80211_rate *rate;
 178
 179         unsigned int flags;
 180         int sent_ps_buffered;
 181         int queue;
 182         u32 tkip_iv32;
 183         u16 tkip_iv16;
 184 };
 185
 186 struct beacon_data {
 187         u8 *head, *tail;
 188         int head_len, tail_len;
 189         int dtim_period;
 190 };
 191
 192 struct ieee80211_if_ap {
 193         struct beacon_data *beacon;
 194
 195         struct list_head vlans;
 196
 197         /* yes, this looks ugly, but guarantees that we can later use
 198          * bitmap_empty :)
 199          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 200         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 201         struct sk_buff_head ps_bc_buf;
 202         atomic_t num_sta_ps; /* number of stations in PS mode */
 203         int dtim_count;
 204 };
 205
 206 struct ieee80211_if_wds {
 207         struct sta_info *sta;
 208         u8 remote_addr[ETH_ALEN];
 209 };
 210
 211 struct ieee80211_if_vlan {
 212         struct list_head list;
 213 };
 214
 215 struct mesh_stats {
 216         __u32 fwded_frames;             /* Mesh forwarded frames */
 217         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 218         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 219         atomic_t estab_plinks;
 220 };
 221
 222 #define PREQ_Q_F_START          0x1
 223 #define PREQ_Q_F_REFRESH        0x2
 224 struct mesh_preq_queue {
 225         struct list_head list;
 226         u8 dst[ETH_ALEN];
 227         u8 flags;
 228 };
 229
 230 enum ieee80211_mgd_state {
 231         IEEE80211_MGD_STATE_IDLE,
 232         IEEE80211_MGD_STATE_PROBE,
 233         IEEE80211_MGD_STATE_AUTH,
 234         IEEE80211_MGD_STATE_ASSOC,
 235 };
 236
 237 struct ieee80211_mgd_work {
 238         struct list_head list;
 239         struct ieee80211_bss *bss;
 240         int ie_len;
 241         u8 prev_bssid[ETH_ALEN];
 242         u8 ssid[IEEE80211_MAX_SSID_LEN];
 243         u8 ssid_len;
 244         unsigned long timeout;
 245         enum ieee80211_mgd_state state;
 246         u16 auth_alg, auth_transaction;
 247
 248         int tries;
 249
 250         u8 key[WLAN_KEY_LEN_WEP104];
 251         u8 key_len, key_idx;
 252
 253         /* must be last */
 254         u8 ie[0]; /* for auth or assoc frame, not probe */
 255 };
 256
 257 /* flags used in struct ieee80211_if_managed.flags */
 258 enum ieee80211_sta_flags {
 259         IEEE80211_STA_BEACON_POLL       = BIT(0),
 260         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 261         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 262         IEEE80211_STA_WMM_ENABLED       = BIT(3),
 263         IEEE80211_STA_DISABLE_11N       = BIT(4),
 264         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 265         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 266 };
 267
 268 /* flags for MLME request */
 269 enum ieee80211_sta_request {
 270         IEEE80211_STA_REQ_SCAN,
 271 };
 272
 273 struct ieee80211_if_managed {
 274         struct timer_list timer;
 275         struct timer_list conn_mon_timer;
 276         struct timer_list bcn_mon_timer;
 277         struct timer_list chswitch_timer;
 278         struct work_struct work;
 279         struct work_struct monitor_work;
 280         struct work_struct chswitch_work;
 281         struct work_struct beacon_loss_work;
 282
 283         unsigned long probe_timeout;
 284
 285         struct mutex mtx;
 286         struct ieee80211_bss *associated;
 287         struct list_head work_list;
 288
 289         u8 bssid[ETH_ALEN];
 290
 291         u16 aid;
 292         u16 capab;
 293
 294         struct sk_buff_head skb_queue;
 295
 296         unsigned long timers_running; /* used for quiesce/restart */
 297         bool powersave; /* powersave requested for this iface */
 298
 299         unsigned long request;
 300
 301         unsigned int flags;
 302
 303         u32 beacon_crc;
 304
 305         enum {
 306                 IEEE80211_MFP_DISABLED,
 307                 IEEE80211_MFP_OPTIONAL,
 308                 IEEE80211_MFP_REQUIRED
 309         } mfp; /* management frame protection */
 310
 311         int wmm_last_param_set;
 312 };
 313
 314 enum ieee80211_ibss_request {
 315         IEEE80211_IBSS_REQ_RUN  = 0,
 316 };
 317
 318 struct ieee80211_if_ibss {
 319         struct timer_list timer;
 320         struct work_struct work;
 321
 322         struct sk_buff_head skb_queue;
 323
 324         unsigned long request;
 325         unsigned long last_scan_completed;
 326
 327         bool timer_running;
 328
 329         bool fixed_bssid;
 330         bool fixed_channel;
 331         bool privacy;
 332
 333         u8 bssid[ETH_ALEN];
 334         u8 ssid[IEEE80211_MAX_SSID_LEN];
 335         u8 ssid_len, ie_len;
 336         u8 *ie;
 337         struct ieee80211_channel *channel;
 338
 339         unsigned long ibss_join_req;
 340         /* probe response/beacon for IBSS */
 341         struct sk_buff *presp, *skb;
 342
 343         enum {
 344                 IEEE80211_IBSS_MLME_SEARCH,
 345                 IEEE80211_IBSS_MLME_JOINED,
 346         } state;
 347 };
 348
 349 struct ieee80211_if_mesh {
 350         struct work_struct work;
 351         struct timer_list housekeeping_timer;
 352         struct timer_list mesh_path_timer;
 353         struct sk_buff_head skb_queue;
 354
 355         unsigned long timers_running;
 356
 357         bool housekeeping;
 358
 359         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 360         size_t mesh_id_len;
 361         /* Active Path Selection Protocol Identifier */
 362         u8 mesh_pp_id[4];
 363         /* Active Path Selection Metric Identifier */
 364         u8 mesh_pm_id[4];
 365         /* Congestion Control Mode Identifier */
 366         u8 mesh_cc_id[4];
 367         /* Local mesh Destination Sequence Number */
 368         u32 dsn;
 369         /* Last used PREQ ID */
 370         u32 preq_id;
 371         atomic_t mpaths;
 372         /* Timestamp of last DSN update */
 373         unsigned long last_dsn_update;
 374         /* Timestamp of last DSN sent */
 375         unsigned long last_preq;
 376         struct mesh_rmc *rmc;
 377         spinlock_t mesh_preq_queue_lock;
 378         struct mesh_preq_queue preq_queue;
 379         int preq_queue_len;
 380         struct mesh_stats mshstats;
 381         struct mesh_config mshcfg;
 382         u32 mesh_seqnum;
 383         bool accepting_plinks;
 384 };
 385
 386 #ifdef CONFIG_MAC80211_MESH
 387 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 388         do { (msh)->mshstats.name++; } while (0)
 389 #else
 390 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 391         do { } while (0)
 392 #endif
 393
 394 /**
 395  * enum ieee80211_sub_if_data_flags - virtual interface flags
 396  *
 397  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 398  * @IEEE80211_SDATA_PROMISC: interface is promisc
 399  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 400  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 401  *      associated stations and deliver multicast frames both
 402  *      back to wireless media and to the local net stack.
 403  */
 404 enum ieee80211_sub_if_data_flags {
 405         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 406         IEEE80211_SDATA_PROMISC                 = BIT(1),
 407         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 408         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 409 };
 410
 411 struct ieee80211_sub_if_data {
 412         struct list_head list;
 413
 414         struct wireless_dev wdev;
 415
 416         /* keys */
 417         struct list_head key_list;
 418
 419         struct net_device *dev;
 420         struct ieee80211_local *local;
 421
 422         unsigned int flags;
 423
 424         int drop_unencrypted;
 425
 426         /*
 427          * keep track of whether the HT opmode (stored in
 428          * vif.bss_info.ht_operation_mode) is valid.
 429          */
 430         bool ht_opmode_valid;
 431
 432         /* Fragment table for host-based reassembly */
 433         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 434         unsigned int fragment_next;
 435
 436 #define NUM_DEFAULT_KEYS 4
 437 #define NUM_DEFAULT_MGMT_KEYS 2
 438         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 439         struct ieee80211_key *default_key;
 440         struct ieee80211_key *default_mgmt_key;
 441
 442         u16 sequence_number;
 443
 444         /*
 445          * AP this belongs to: self in AP mode and
 446          * corresponding AP in VLAN mode, NULL for
 447          * all others (might be needed later in IBSS)
 448          */
 449         struct ieee80211_if_ap *bss;
 450
 451         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 452         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 453
 454         union {
 455                 struct ieee80211_if_ap ap;
 456                 struct ieee80211_if_wds wds;
 457                 struct ieee80211_if_vlan vlan;
 458                 struct ieee80211_if_managed mgd;
 459                 struct ieee80211_if_ibss ibss;
 460 #ifdef CONFIG_MAC80211_MESH
 461                 struct ieee80211_if_mesh mesh;
 462 #endif
 463                 u32 mntr_flags;
 464         } u;
 465
 466 #ifdef CONFIG_MAC80211_DEBUGFS
 467         struct dentry *debugfsdir;
 468         union {
 469                 struct {
 470                         struct dentry *drop_unencrypted;
 471                         struct dentry *bssid;
 472                         struct dentry *aid;
 473                         struct dentry *capab;
 474                         struct dentry *force_unicast_rateidx;
 475                         struct dentry *max_ratectrl_rateidx;
 476                 } sta;
 477                 struct {
 478                         struct dentry *drop_unencrypted;
 479                         struct dentry *num_sta_ps;
 480                         struct dentry *dtim_count;
 481                         struct dentry *force_unicast_rateidx;
 482                         struct dentry *max_ratectrl_rateidx;
 483                         struct dentry *num_buffered_multicast;
 484                 } ap;
 485                 struct {
 486                         struct dentry *drop_unencrypted;
 487                         struct dentry *peer;
 488                         struct dentry *force_unicast_rateidx;
 489                         struct dentry *max_ratectrl_rateidx;
 490                 } wds;
 491                 struct {
 492                         struct dentry *drop_unencrypted;
 493                         struct dentry *force_unicast_rateidx;
 494                         struct dentry *max_ratectrl_rateidx;
 495                 } vlan;
 496                 struct {
 497                         struct dentry *mode;
 498                 } monitor;
 499         } debugfs;
 500         struct {
 501                 struct dentry *default_key;
 502                 struct dentry *default_mgmt_key;
 503         } common_debugfs;
 504
 505 #ifdef CONFIG_MAC80211_MESH
 506         struct dentry *mesh_stats_dir;
 507         struct {
 508                 struct dentry *fwded_frames;
 509                 struct dentry *dropped_frames_ttl;
 510                 struct dentry *dropped_frames_no_route;
 511                 struct dentry *estab_plinks;
 512                 struct timer_list mesh_path_timer;
 513         } mesh_stats;
 514
 515         struct dentry *mesh_config_dir;
 516         struct {
 517                 struct dentry *dot11MeshRetryTimeout;
 518                 struct dentry *dot11MeshConfirmTimeout;
 519                 struct dentry *dot11MeshHoldingTimeout;
 520                 struct dentry *dot11MeshMaxRetries;
 521                 struct dentry *dot11MeshTTL;
 522                 struct dentry *auto_open_plinks;
 523                 struct dentry *dot11MeshMaxPeerLinks;
 524                 struct dentry *dot11MeshHWMPactivePathTimeout;
 525                 struct dentry *dot11MeshHWMPpreqMinInterval;
 526                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 527                 struct dentry *dot11MeshHWMPmaxPREQretries;
 528                 struct dentry *path_refresh_time;
 529                 struct dentry *min_discovery_timeout;
 530         } mesh_config;
 531 #endif
 532
 533 #endif
 534         /* must be last, dynamically sized area in this! */
 535         struct ieee80211_vif vif;
 536 };
 537
 538 static inline
 539 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 540 {
 541         return container_of(p, struct ieee80211_sub_if_data, vif);
 542 }
 543
 544 static inline void
 545 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 546                             u8 mesh_id_len, u8 *mesh_id)
 547 {
 548 #ifdef CONFIG_MAC80211_MESH
 549         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 550         ifmsh->mesh_id_len = mesh_id_len;
 551         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 552 #else
 553         WARN_ON(1);
 554 #endif
 555 }
 556
 557 enum {
 558         IEEE80211_RX_MSG        = 1,
 559         IEEE80211_TX_STATUS_MSG = 2,
 560         IEEE80211_DELBA_MSG     = 3,
 561         IEEE80211_ADDBA_MSG     = 4,
 562 };
 563
 564 enum queue_stop_reason {
 565         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 566         IEEE80211_QUEUE_STOP_REASON_PS,
 567         IEEE80211_QUEUE_STOP_REASON_CSA,
 568         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 569         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 570         IEEE80211_QUEUE_STOP_REASON_PENDING,
 571         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 572 };
 573
 574 struct ieee80211_master_priv {
 575         struct ieee80211_local *local;
 576 };
 577
 578 struct ieee80211_local {
 579         /* embed the driver visible part.
 580          * don't cast (use the static inlines below), but we keep
 581          * it first anyway so they become a no-op */
 582         struct ieee80211_hw hw;
 583
 584         const struct ieee80211_ops *ops;
 585
 586         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 587         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 588         spinlock_t queue_stop_reason_lock;
 589
 590         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 591         int open_count;
 592         int monitors, cooked_mntrs;
 593         /* number of interfaces with corresponding FIF_ flags */
 594         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 595         unsigned int filter_flags; /* FIF_* */
 596         struct iw_statistics wstats;
 597         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 598
 599         /*
 600          * suspended is true if we finished all the suspend _and_ we have
 601          * not yet come up from resume. This is to be used by mac80211
 602          * to ensure driver sanity during suspend and mac80211's own
 603          * sanity. It can eventually be used for WoW as well.
 604          */
 605         bool suspended;
 606
 607         /*
 608          * quiescing is true during the suspend process _only_ to
 609          * ease timer cancelling etc.
 610          */
 611         bool quiescing;
 612
 613         int tx_headroom; /* required headroom for hardware/radiotap */
 614
 615         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 616          * added to skb_queue will be processed, but frames in
 617          * skb_queue_unreliable may be dropped if the total length of these
 618          * queues increases over the limit. */
 619 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 620         struct tasklet_struct tasklet;
 621         struct sk_buff_head skb_queue;
 622         struct sk_buff_head skb_queue_unreliable;
 623
 624         /* Station data */
 625         /*
 626          * The lock only protects the list, hash, timer and counter
 627          * against manipulation, reads are done in RCU. Additionally,
 628          * the lock protects each BSS's TIM bitmap.
 629          */
 630         spinlock_t sta_lock;
 631         unsigned long num_sta;
 632         struct list_head sta_list;
 633         struct sta_info *sta_hash[STA_HASH_SIZE];
 634         struct timer_list sta_cleanup;
 635
 636         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 637         struct tasklet_struct tx_pending_tasklet;
 638
 639         /*
 640          * This lock is used to prevent concurrent A-MPDU
 641          * session start/stop processing, this thus also
 642          * synchronises the ->ampdu_action() callback to
 643          * drivers and limits it to one at a time.
 644          */
 645         spinlock_t ampdu_lock;
 646
 647         /* number of interfaces with corresponding IFF_ flags */
 648         atomic_t iff_allmultis, iff_promiscs;
 649
 650         struct rate_control_ref *rate_ctrl;
 651
 652         struct crypto_blkcipher *wep_tx_tfm;
 653         struct crypto_blkcipher *wep_rx_tfm;
 654         u32 wep_iv;
 655
 656         /* see iface.c */
 657         struct list_head interfaces;
 658         struct mutex iflist_mtx;
 659
 660         /*
 661          * Key lock, protects sdata's key_list and sta_info's
 662          * key pointers (write access, they're RCU.)
 663          */
 664         spinlock_t key_lock;
 665
 666
 667         /* Scanning and BSS list */
 668         struct mutex scan_mtx;
 669         bool sw_scanning, hw_scanning;
 670         struct cfg80211_ssid scan_ssid;
 671         struct cfg80211_scan_request int_scan_req;
 672         struct cfg80211_scan_request *scan_req;
 673         struct ieee80211_channel *scan_channel;
 674         const u8 *orig_ies;
 675         int orig_ies_len;
 676         int scan_channel_idx;
 677         int scan_ies_len;
 678
 679         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 680         struct delayed_work scan_work;
 681         struct ieee80211_sub_if_data *scan_sdata;
 682         enum nl80211_channel_type oper_channel_type;
 683         struct ieee80211_channel *oper_channel, *csa_channel;
 684
 685         /* SNMP counters */
 686         /* dot11CountersTable */
 687         u32 dot11TransmittedFragmentCount;
 688         u32 dot11MulticastTransmittedFrameCount;
 689         u32 dot11FailedCount;
 690         u32 dot11RetryCount;
 691         u32 dot11MultipleRetryCount;
 692         u32 dot11FrameDuplicateCount;
 693         u32 dot11ReceivedFragmentCount;
 694         u32 dot11MulticastReceivedFrameCount;
 695         u32 dot11TransmittedFrameCount;
 696
 697 #ifdef CONFIG_MAC80211_LEDS
 698         int tx_led_counter, rx_led_counter;
 699         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 700         char tx_led_name[32], rx_led_name[32],
 701              assoc_led_name[32], radio_led_name[32];
 702 #endif
 703
 704 #ifdef CONFIG_MAC80211_DEBUGFS
 705         struct work_struct sta_debugfs_add;
 706 #endif
 707
 708 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 709         /* TX/RX handler statistics */
 710         unsigned int tx_handlers_drop;
 711         unsigned int tx_handlers_queued;
 712         unsigned int tx_handlers_drop_unencrypted;
 713         unsigned int tx_handlers_drop_fragment;
 714         unsigned int tx_handlers_drop_wep;
 715         unsigned int tx_handlers_drop_not_assoc;
 716         unsigned int tx_handlers_drop_unauth_port;
 717         unsigned int rx_handlers_drop;
 718         unsigned int rx_handlers_queued;
 719         unsigned int rx_handlers_drop_nullfunc;
 720         unsigned int rx_handlers_drop_defrag;
 721         unsigned int rx_handlers_drop_short;
 722         unsigned int rx_handlers_drop_passive_scan;
 723         unsigned int tx_expand_skb_head;
 724         unsigned int tx_expand_skb_head_cloned;
 725         unsigned int rx_expand_skb_head;
 726         unsigned int rx_expand_skb_head2;
 727         unsigned int rx_handlers_fragments;
 728         unsigned int tx_status_drop;
 729 #define I802_DEBUG_INC(c) (c)++
 730 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 731 #define I802_DEBUG_INC(c) do { } while (0)
 732 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 733
 734
 735         int total_ps_buffered; /* total number of all buffered unicast and
 736                                 * multicast packets for power saving stations
 737                                 */
 738         int wifi_wme_noack_test;
 739         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 740
 741         bool pspolling;
 742         /*
 743          * PS can only be enabled when we have exactly one managed
 744          * interface (and monitors) in PS, this then points there.
 745          */
 746         struct ieee80211_sub_if_data *ps_sdata;
 747         struct work_struct dynamic_ps_enable_work;
 748         struct work_struct dynamic_ps_disable_work;
 749         struct timer_list dynamic_ps_timer;
 750         struct notifier_block network_latency_notifier;
 751
 752         int user_power_level; /* in dBm */
 753         int power_constr_level; /* in dBm */
 754
 755         struct work_struct restart_work;
 756
 757 #ifdef CONFIG_MAC80211_DEBUGFS
 758         struct local_debugfsdentries {
 759                 struct dentry *rcdir;
 760                 struct dentry *rcname;
 761                 struct dentry *frequency;
 762                 struct dentry *total_ps_buffered;
 763                 struct dentry *wep_iv;
 764                 struct dentry *tsf;
 765                 struct dentry *queues;
 766                 struct dentry *reset;
 767                 struct dentry *noack;
 768                 struct dentry *statistics;
 769                 struct local_debugfsdentries_statsdentries {
 770                         struct dentry *transmitted_fragment_count;
 771                         struct dentry *multicast_transmitted_frame_count;
 772                         struct dentry *failed_count;
 773                         struct dentry *retry_count;
 774                         struct dentry *multiple_retry_count;
 775                         struct dentry *frame_duplicate_count;
 776                         struct dentry *received_fragment_count;
 777                         struct dentry *multicast_received_frame_count;
 778                         struct dentry *transmitted_frame_count;
 779                         struct dentry *wep_undecryptable_count;
 780                         struct dentry *num_scans;
 781 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 782                         struct dentry *tx_handlers_drop;
 783                         struct dentry *tx_handlers_queued;
 784                         struct dentry *tx_handlers_drop_unencrypted;
 785                         struct dentry *tx_handlers_drop_fragment;
 786                         struct dentry *tx_handlers_drop_wep;
 787                         struct dentry *tx_handlers_drop_not_assoc;
 788                         struct dentry *tx_handlers_drop_unauth_port;
 789                         struct dentry *rx_handlers_drop;
 790                         struct dentry *rx_handlers_queued;
 791                         struct dentry *rx_handlers_drop_nullfunc;
 792                         struct dentry *rx_handlers_drop_defrag;
 793                         struct dentry *rx_handlers_drop_short;
 794                         struct dentry *rx_handlers_drop_passive_scan;
 795                         struct dentry *tx_expand_skb_head;
 796                         struct dentry *tx_expand_skb_head_cloned;
 797                         struct dentry *rx_expand_skb_head;
 798                         struct dentry *rx_expand_skb_head2;
 799                         struct dentry *rx_handlers_fragments;
 800                         struct dentry *tx_status_drop;
 801 #endif
 802                         struct dentry *dot11ACKFailureCount;
 803                         struct dentry *dot11RTSFailureCount;
 804                         struct dentry *dot11FCSErrorCount;
 805                         struct dentry *dot11RTSSuccessCount;
 806                 } stats;
 807                 struct dentry *stations;
 808                 struct dentry *keys;
 809         } debugfs;
 810 #endif
 811 };
 812
 813 static inline struct ieee80211_sub_if_data *
 814 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 815 {
 816         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 817
 818         BUG_ON(!local || local->mdev == dev);
 819
 820         return netdev_priv(dev);
 821 }
 822
 823 /* this struct represents 802.11n's RA/TID combination */
 824 struct ieee80211_ra_tid {
 825         u8 ra[ETH_ALEN];
 826         u16 tid;
 827 };
 828
 829 /* Parsed Information Elements */
 830 struct ieee802_11_elems {
 831         u8 *ie_start;
 832         size_t total_len;
 833
 834         /* pointers to IEs */
 835         u8 *ssid;
 836         u8 *supp_rates;
 837         u8 *fh_params;
 838         u8 *ds_params;
 839         u8 *cf_params;
 840         struct ieee80211_tim_ie *tim;
 841         u8 *ibss_params;
 842         u8 *challenge;
 843         u8 *wpa;
 844         u8 *rsn;
 845         u8 *erp_info;
 846         u8 *ext_supp_rates;
 847         u8 *wmm_info;
 848         u8 *wmm_param;
 849         struct ieee80211_ht_cap *ht_cap_elem;
 850         struct ieee80211_ht_info *ht_info_elem;
 851         u8 *mesh_config;
 852         u8 *mesh_id;
 853         u8 *peer_link;
 854         u8 *preq;
 855         u8 *prep;
 856         u8 *perr;
 857         u8 *ch_switch_elem;
 858         u8 *country_elem;
 859         u8 *pwr_constr_elem;
 860         u8 *quiet_elem;         /* first quite element */
 861         u8 *timeout_int;
 862
 863         /* length of them, respectively */
 864         u8 ssid_len;
 865         u8 supp_rates_len;
 866         u8 fh_params_len;
 867         u8 ds_params_len;
 868         u8 cf_params_len;
 869         u8 tim_len;
 870         u8 ibss_params_len;
 871         u8 challenge_len;
 872         u8 wpa_len;
 873         u8 rsn_len;
 874         u8 erp_info_len;
 875         u8 ext_supp_rates_len;
 876         u8 wmm_info_len;
 877         u8 wmm_param_len;
 878         u8 mesh_config_len;
 879         u8 mesh_id_len;
 880         u8 peer_link_len;
 881         u8 preq_len;
 882         u8 prep_len;
 883         u8 perr_len;
 884         u8 ch_switch_elem_len;
 885         u8 country_elem_len;
 886         u8 pwr_constr_elem_len;
 887         u8 quiet_elem_len;
 888         u8 num_of_quiet_elem;   /* can be more the one */
 889         u8 timeout_int_len;
 890 };
 891
 892 static inline struct ieee80211_local *hw_to_local(
 893         struct ieee80211_hw *hw)
 894 {
 895         return container_of(hw, struct ieee80211_local, hw);
 896 }
 897
 898 static inline struct ieee80211_hw *local_to_hw(
 899         struct ieee80211_local *local)
 900 {
 901         return &local->hw;
 902 }
 903
 904
 905 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 906 {
 907         return compare_ether_addr(raddr, addr) == 0 ||
 908                is_broadcast_ether_addr(raddr);
 909 }
 910
 911
 912 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 913 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 914 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 915                                       u32 changed);
 916 void ieee80211_configure_filter(struct ieee80211_local *local);
 917 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 918
 919 /* wireless extensions */
 920 extern const struct iw_handler_def ieee80211_iw_handler_def;
 921
 922 /* STA code */
 923 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 924 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
 925                        struct cfg80211_auth_request *req);
 926 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 927                         struct cfg80211_assoc_request *req);
 928 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 929                          struct cfg80211_deauth_request *req,
 930                          void *cookie);
 931 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
 932                            struct cfg80211_disassoc_request *req,
 933                            void *cookie);
 934 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 935                                           struct sk_buff *skb);
 936 void ieee80211_send_pspoll(struct ieee80211_local *local,
 937                            struct ieee80211_sub_if_data *sdata);
 938 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 939 int ieee80211_max_network_latency(struct notifier_block *nb,
 940                                   unsigned long data, void *dummy);
 941 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 942                                       struct ieee80211_channel_sw_ie *sw_elem,
 943                                       struct ieee80211_bss *bss);
 944 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 945 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 946
 947 /* IBSS code */
 948 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 949 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 950 ieee80211_rx_result
 951 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 952 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 953                                         u8 *bssid, u8 *addr, u32 supp_rates);
 954 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 955                         struct cfg80211_ibss_params *params);
 956 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 957 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 958 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 959
 960 /* scan/BSS handling */
 961 void ieee80211_scan_work(struct work_struct *work);
 962 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 963                                     const u8 *ssid, u8 ssid_len);
 964 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 965                            struct cfg80211_scan_request *req);
 966 void ieee80211_scan_cancel(struct ieee80211_local *local);
 967 ieee80211_rx_result
 968 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 969
 970 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 971 struct ieee80211_bss *
 972 ieee80211_bss_info_update(struct ieee80211_local *local,
 973                           struct ieee80211_rx_status *rx_status,
 974                           struct ieee80211_mgmt *mgmt,
 975                           size_t len,
 976                           struct ieee802_11_elems *elems,
 977                           struct ieee80211_channel *channel,
 978                           bool beacon);
 979 struct ieee80211_bss *
 980 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 981                      u8 *ssid, u8 ssid_len);
 982 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 983                           struct ieee80211_bss *bss);
 984
 985 /* interface handling */
 986 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 987                      struct net_device **new_dev, enum nl80211_iftype type,
 988                      struct vif_params *params);
 989 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 990                              enum nl80211_iftype type);
 991 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 992 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 993 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
 994 void ieee80211_recalc_idle(struct ieee80211_local *local);
 995
 996 /* tx handling */
 997 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 998 void ieee80211_tx_pending(unsigned long data);
 999 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
1000 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
1001 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
1002
1003 /* HT */
1004 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1005                                        struct ieee80211_ht_cap *ht_cap_ie,
1006                                        struct ieee80211_sta_ht_cap *ht_cap);
1007 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1008 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1009                           const u8 *da, u16 tid,
1010                           u16 initiator, u16 reason_code);
1011
1012 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
1013                                 u16 tid, u16 initiator, u16 reason);
1014 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1015                                     u16 initiator, u16 reason);
1016 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1017 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1018                              struct sta_info *sta,
1019                              struct ieee80211_mgmt *mgmt, size_t len);
1020 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1021                                   struct sta_info *sta,
1022                                   struct ieee80211_mgmt *mgmt,
1023                                   size_t len);
1024 void ieee80211_process_addba_request(struct ieee80211_local *local,
1025                                      struct sta_info *sta,
1026                                      struct ieee80211_mgmt *mgmt,
1027                                      size_t len);
1028
1029 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1030                                    enum ieee80211_back_parties initiator);
1031
1032 /* Spectrum management */
1033 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1034                                        struct ieee80211_mgmt *mgmt,
1035                                        size_t len);
1036
1037 /* Suspend/resume and hw reconfiguration */
1038 int ieee80211_reconfig(struct ieee80211_local *local);
1039
1040 #ifdef CONFIG_PM
1041 int __ieee80211_suspend(struct ieee80211_hw *hw);
1042
1043 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1044 {
1045         return ieee80211_reconfig(hw_to_local(hw));
1046 }
1047 #else
1048 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1049 {
1050         return 0;
1051 }
1052
1053 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1054 {
1055         return 0;
1056 }
1057 #endif
1058
1059 /* utility functions/constants */
1060 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1061 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1062                         enum nl80211_iftype type);
1063 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1064                              int rate, int erp, int short_preamble);
1065 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1066                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1067                                      gfp_t gfp);
1068 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1069 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1070                       int encrypt);
1071 void ieee802_11_parse_elems(u8 *start, size_t len,
1072                             struct ieee802_11_elems *elems);
1073 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1074                                struct ieee802_11_elems *elems,
1075                                u64 filter, u32 crc);
1076 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1077                               enum ieee80211_band band);
1078
1079 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1080 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1081 void ieee80211_dynamic_ps_timer(unsigned long data);
1082 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1083                              struct ieee80211_sub_if_data *sdata,
1084                              int powersave);
1085 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1086                              struct ieee80211_hdr *hdr);
1087 void ieee80211_beacon_loss_work(struct work_struct *work);
1088
1089 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1090                                      enum queue_stop_reason reason);
1091 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1092                                      enum queue_stop_reason reason);
1093 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1094                                     enum queue_stop_reason reason);
1095 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1096                                     enum queue_stop_reason reason);
1097 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1098                                struct sk_buff *skb);
1099 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1100                                struct sk_buff_head *skbs);
1101
1102 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1103                          u16 transaction, u16 auth_alg,
1104                          u8 *extra, size_t extra_len, const u8 *bssid,
1105                          const u8 *key, u8 key_len, u8 key_idx);
1106 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1107                              const u8 *ie, size_t ie_len);
1108 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1109                               const u8 *ssid, size_t ssid_len,
1110                               const u8 *ie, size_t ie_len);
1111
1112 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1113                                   const size_t supp_rates_len,
1114                                   const u8 *supp_rates);
1115 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1116                             struct ieee802_11_elems *elems,
1117                             enum ieee80211_band band);
1118
1119 #ifdef CONFIG_MAC80211_NOINLINE
1120 #define debug_noinline noinline
1121 #else
1122 #define debug_noinline
1123 #endif
1124
1125 #endif /* IEEE80211_I_H */