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/mac80211.h>
  28 #include "key.h"
  29 #include "sta_info.h"
  30
  31 struct ieee80211_local;
  32
  33 /* Maximum number of broadcast/multicast frames to buffer when some of the
  34  * associated stations are using power saving. */
  35 #define AP_MAX_BC_BUFFER 128
  36
  37 /* Maximum number of frames buffered to all STAs, including multicast frames.
  38  * Note: increasing this limit increases the potential memory requirement. Each
  39  * frame can be up to about 2 kB long. */
  40 #define TOTAL_MAX_TX_BUFFER 512
  41
  42 /* Required encryption head and tailroom */
  43 #define IEEE80211_ENCRYPT_HEADROOM 8
  44 #define IEEE80211_ENCRYPT_TAILROOM 18
  45
  46 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  47  * reception of at least three fragmented frames. This limit can be increased
  48  * by changing this define, at the cost of slower frame reassembly and
  49  * increased memory use (about 2 kB of RAM per entry). */
  50 #define IEEE80211_FRAGMENT_MAX 4
  51
  52 /*
  53  * Time after which we ignore scan results and no longer report/use
  54  * them in any way.
  55  */
  56 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  57
  58 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  59
  60 struct ieee80211_fragment_entry {
  61         unsigned long first_frag_time;
  62         unsigned int seq;
  63         unsigned int rx_queue;
  64         unsigned int last_frag;
  65         unsigned int extra_len;
  66         struct sk_buff_head skb_list;
  67         int ccmp; /* Whether fragments were encrypted with CCMP */
  68         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  69 };
  70
  71
  72 struct ieee80211_bss {
  73         /* Yes, this is a hack */
  74         struct cfg80211_bss cbss;
  75
  76         /* don't want to look up all the time */
  77         size_t ssid_len;
  78         u8 ssid[IEEE80211_MAX_SSID_LEN];
  79
  80         u8 dtim_period;
  81
  82         bool wmm_used;
  83
  84         unsigned long last_probe_resp;
  85
  86 #ifdef CONFIG_MAC80211_MESH
  87         u8 *mesh_id;
  88         size_t mesh_id_len;
  89         u8 *mesh_cfg;
  90 #endif
  91
  92 #define IEEE80211_MAX_SUPP_RATES 32
  93         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  94         size_t supp_rates_len;
  95
  96         /*
  97          * During assocation, we save an ERP value from a probe response so
  98          * that we can feed ERP info to the driver when handling the
  99          * association completes. these fields probably won't be up-to-date
 100          * otherwise, you probably don't want to use them.
 101          */
 102         bool has_erp_value;
 103         u8 erp_value;
 104 };
 105
 106 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 107 {
 108 #ifdef CONFIG_MAC80211_MESH
 109         return bss->mesh_cfg;
 110 #endif
 111         return NULL;
 112 }
 113
 114 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 115 {
 116 #ifdef CONFIG_MAC80211_MESH
 117         return bss->mesh_id;
 118 #endif
 119         return NULL;
 120 }
 121
 122 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 123 {
 124 #ifdef CONFIG_MAC80211_MESH
 125         return bss->mesh_id_len;
 126 #endif
 127         return 0;
 128 }
 129
 130
 131 typedef unsigned __bitwise__ ieee80211_tx_result;
 132 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 133 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 134 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 135
 136 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 137 #define IEEE80211_TX_UNICAST            BIT(1)
 138 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 139
 140 struct ieee80211_tx_data {
 141         struct sk_buff *skb;
 142         struct net_device *dev;
 143         struct ieee80211_local *local;
 144         struct ieee80211_sub_if_data *sdata;
 145         struct sta_info *sta;
 146         struct ieee80211_key *key;
 147
 148         struct ieee80211_channel *channel;
 149
 150         u16 ethertype;
 151         unsigned int flags;
 152 };
 153
 154
 155 typedef unsigned __bitwise__ ieee80211_rx_result;
 156 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 157 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 158 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 159 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 160
 161 #define IEEE80211_RX_IN_SCAN            BIT(0)
 162 /* frame is destined to interface currently processed (incl. multicast frames) */
 163 #define IEEE80211_RX_RA_MATCH           BIT(1)
 164 #define IEEE80211_RX_AMSDU              BIT(2)
 165 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 166 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 167
 168 struct ieee80211_rx_data {
 169         struct sk_buff *skb;
 170         struct net_device *dev;
 171         struct ieee80211_local *local;
 172         struct ieee80211_sub_if_data *sdata;
 173         struct sta_info *sta;
 174         struct ieee80211_key *key;
 175         struct ieee80211_rx_status *status;
 176         struct ieee80211_rate *rate;
 177
 178         unsigned int flags;
 179         int sent_ps_buffered;
 180         int queue;
 181         u32 tkip_iv32;
 182         u16 tkip_iv16;
 183 };
 184
 185 struct beacon_data {
 186         u8 *head, *tail;
 187         int head_len, tail_len;
 188         int dtim_period;
 189 };
 190
 191 struct ieee80211_if_ap {
 192         struct beacon_data *beacon;
 193
 194         struct list_head vlans;
 195
 196         /* yes, this looks ugly, but guarantees that we can later use
 197          * bitmap_empty :)
 198          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 199         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 200         struct sk_buff_head ps_bc_buf;
 201         atomic_t num_sta_ps; /* number of stations in PS mode */
 202         int dtim_count;
 203 };
 204
 205 struct ieee80211_if_wds {
 206         struct sta_info *sta;
 207         u8 remote_addr[ETH_ALEN];
 208 };
 209
 210 struct ieee80211_if_vlan {
 211         struct list_head list;
 212 };
 213
 214 struct mesh_stats {
 215         __u32 fwded_frames;             /* Mesh forwarded frames */
 216         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 217         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 218         atomic_t estab_plinks;
 219 };
 220
 221 #define PREQ_Q_F_START          0x1
 222 #define PREQ_Q_F_REFRESH        0x2
 223 struct mesh_preq_queue {
 224         struct list_head list;
 225         u8 dst[ETH_ALEN];
 226         u8 flags;
 227 };
 228
 229 enum ieee80211_mgd_state {
 230         IEEE80211_MGD_STATE_IDLE,
 231         IEEE80211_MGD_STATE_PROBE,
 232         IEEE80211_MGD_STATE_AUTH,
 233         IEEE80211_MGD_STATE_ASSOC,
 234 };
 235
 236 struct ieee80211_mgd_work {
 237         struct list_head list;
 238         struct ieee80211_bss *bss;
 239         int ie_len;
 240         u8 prev_bssid[ETH_ALEN];
 241         u8 ssid[IEEE80211_MAX_SSID_LEN];
 242         u8 ssid_len;
 243         unsigned long timeout;
 244         enum ieee80211_mgd_state state;
 245         u16 auth_alg, auth_transaction;
 246
 247         int tries;
 248
 249         u8 key[WLAN_KEY_LEN_WEP104];
 250         u8 key_len, key_idx;
 251
 252         /* must be last */
 253         u8 ie[0]; /* for auth or assoc frame, not probe */
 254 };
 255
 256 /* flags used in struct ieee80211_if_managed.flags */
 257 enum ieee80211_sta_flags {
 258         IEEE80211_STA_BEACON_POLL       = BIT(0),
 259         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 260         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 261         IEEE80211_STA_WMM_ENABLED       = BIT(3),
 262         IEEE80211_STA_DISABLE_11N       = BIT(4),
 263         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 264         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 265 };
 266
 267 /* flags for MLME request */
 268 enum ieee80211_sta_request {
 269         IEEE80211_STA_REQ_SCAN,
 270 };
 271
 272 struct ieee80211_if_managed {
 273         struct timer_list timer;
 274         struct timer_list conn_mon_timer;
 275         struct timer_list bcn_mon_timer;
 276         struct timer_list chswitch_timer;
 277         struct work_struct work;
 278         struct work_struct monitor_work;
 279         struct work_struct chswitch_work;
 280         struct work_struct beacon_loss_work;
 281
 282         unsigned long probe_timeout;
 283
 284         struct mutex mtx;
 285         struct ieee80211_bss *associated;
 286         struct list_head work_list;
 287
 288         u8 bssid[ETH_ALEN];
 289
 290         u16 aid;
 291         u16 capab;
 292
 293         struct sk_buff_head skb_queue;
 294
 295         unsigned long timers_running; /* used for quiesce/restart */
 296         bool powersave; /* powersave requested for this iface */
 297
 298         unsigned long request;
 299
 300         unsigned int flags;
 301
 302         u32 beacon_crc;
 303
 304         enum {
 305                 IEEE80211_MFP_DISABLED,
 306                 IEEE80211_MFP_OPTIONAL,
 307                 IEEE80211_MFP_REQUIRED
 308         } mfp; /* management frame protection */
 309
 310         int wmm_last_param_set;
 311 };
 312
 313 enum ieee80211_ibss_request {
 314         IEEE80211_IBSS_REQ_RUN  = 0,
 315 };
 316
 317 struct ieee80211_if_ibss {
 318         struct timer_list timer;
 319         struct work_struct work;
 320
 321         struct sk_buff_head skb_queue;
 322
 323         unsigned long request;
 324         unsigned long last_scan_completed;
 325
 326         bool timer_running;
 327
 328         bool fixed_bssid;
 329         bool fixed_channel;
 330         bool privacy;
 331
 332         u8 bssid[ETH_ALEN];
 333         u8 ssid[IEEE80211_MAX_SSID_LEN];
 334         u8 ssid_len, ie_len;
 335         u8 *ie;
 336         struct ieee80211_channel *channel;
 337
 338         unsigned long ibss_join_req;
 339         /* probe response/beacon for IBSS */
 340         struct sk_buff *presp, *skb;
 341
 342         enum {
 343                 IEEE80211_IBSS_MLME_SEARCH,
 344                 IEEE80211_IBSS_MLME_JOINED,
 345         } state;
 346 };
 347
 348 struct ieee80211_if_mesh {
 349         struct work_struct work;
 350         struct timer_list housekeeping_timer;
 351         struct timer_list mesh_path_timer;
 352         struct sk_buff_head skb_queue;
 353
 354         unsigned long timers_running;
 355
 356         bool housekeeping;
 357
 358         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 359         size_t mesh_id_len;
 360         /* Active Path Selection Protocol Identifier */
 361         u8 mesh_pp_id[4];
 362         /* Active Path Selection Metric Identifier */
 363         u8 mesh_pm_id[4];
 364         /* Congestion Control Mode Identifier */
 365         u8 mesh_cc_id[4];
 366         /* Local mesh Destination Sequence Number */
 367         u32 dsn;
 368         /* Last used PREQ ID */
 369         u32 preq_id;
 370         atomic_t mpaths;
 371         /* Timestamp of last DSN update */
 372         unsigned long last_dsn_update;
 373         /* Timestamp of last DSN sent */
 374         unsigned long last_preq;
 375         struct mesh_rmc *rmc;
 376         spinlock_t mesh_preq_queue_lock;
 377         struct mesh_preq_queue preq_queue;
 378         int preq_queue_len;
 379         struct mesh_stats mshstats;
 380         struct mesh_config mshcfg;
 381         u32 mesh_seqnum;
 382         bool accepting_plinks;
 383 };
 384
 385 #ifdef CONFIG_MAC80211_MESH
 386 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 387         do { (msh)->mshstats.name++; } while (0)
 388 #else
 389 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 390         do { } while (0)
 391 #endif
 392
 393 /**
 394  * enum ieee80211_sub_if_data_flags - virtual interface flags
 395  *
 396  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 397  * @IEEE80211_SDATA_PROMISC: interface is promisc
 398  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 399  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 400  *      associated stations and deliver multicast frames both
 401  *      back to wireless media and to the local net stack.
 402  */
 403 enum ieee80211_sub_if_data_flags {
 404         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 405         IEEE80211_SDATA_PROMISC                 = BIT(1),
 406         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 407         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 408 };
 409
 410 struct ieee80211_sub_if_data {
 411         struct list_head list;
 412
 413         struct wireless_dev wdev;
 414
 415         /* keys */
 416         struct list_head key_list;
 417
 418         struct net_device *dev;
 419         struct ieee80211_local *local;
 420
 421         unsigned int flags;
 422
 423         int drop_unencrypted;
 424
 425         /*
 426          * keep track of whether the HT opmode (stored in
 427          * vif.bss_info.ht_operation_mode) is valid.
 428          */
 429         bool ht_opmode_valid;
 430
 431         /* Fragment table for host-based reassembly */
 432         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 433         unsigned int fragment_next;
 434
 435 #define NUM_DEFAULT_KEYS 4
 436 #define NUM_DEFAULT_MGMT_KEYS 2
 437         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 438         struct ieee80211_key *default_key;
 439         struct ieee80211_key *default_mgmt_key;
 440
 441         u16 sequence_number;
 442
 443         /*
 444          * AP this belongs to: self in AP mode and
 445          * corresponding AP in VLAN mode, NULL for
 446          * all others (might be needed later in IBSS)
 447          */
 448         struct ieee80211_if_ap *bss;
 449
 450         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 451         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 452
 453         union {
 454                 struct ieee80211_if_ap ap;
 455                 struct ieee80211_if_wds wds;
 456                 struct ieee80211_if_vlan vlan;
 457                 struct ieee80211_if_managed mgd;
 458                 struct ieee80211_if_ibss ibss;
 459 #ifdef CONFIG_MAC80211_MESH
 460                 struct ieee80211_if_mesh mesh;
 461 #endif
 462                 u32 mntr_flags;
 463         } u;
 464
 465 #ifdef CONFIG_MAC80211_DEBUGFS
 466         struct dentry *debugfsdir;
 467         union {
 468                 struct {
 469                         struct dentry *drop_unencrypted;
 470                         struct dentry *bssid;
 471                         struct dentry *aid;
 472                         struct dentry *capab;
 473                         struct dentry *force_unicast_rateidx;
 474                         struct dentry *max_ratectrl_rateidx;
 475                 } sta;
 476                 struct {
 477                         struct dentry *drop_unencrypted;
 478                         struct dentry *num_sta_ps;
 479                         struct dentry *dtim_count;
 480                         struct dentry *force_unicast_rateidx;
 481                         struct dentry *max_ratectrl_rateidx;
 482                         struct dentry *num_buffered_multicast;
 483                 } ap;
 484                 struct {
 485                         struct dentry *drop_unencrypted;
 486                         struct dentry *peer;
 487                         struct dentry *force_unicast_rateidx;
 488                         struct dentry *max_ratectrl_rateidx;
 489                 } wds;
 490                 struct {
 491                         struct dentry *drop_unencrypted;
 492                         struct dentry *force_unicast_rateidx;
 493                         struct dentry *max_ratectrl_rateidx;
 494                 } vlan;
 495                 struct {
 496                         struct dentry *mode;
 497                 } monitor;
 498         } debugfs;
 499         struct {
 500                 struct dentry *default_key;
 501                 struct dentry *default_mgmt_key;
 502         } common_debugfs;
 503
 504 #ifdef CONFIG_MAC80211_MESH
 505         struct dentry *mesh_stats_dir;
 506         struct {
 507                 struct dentry *fwded_frames;
 508                 struct dentry *dropped_frames_ttl;
 509                 struct dentry *dropped_frames_no_route;
 510                 struct dentry *estab_plinks;
 511                 struct timer_list mesh_path_timer;
 512         } mesh_stats;
 513
 514         struct dentry *mesh_config_dir;
 515         struct {
 516                 struct dentry *dot11MeshRetryTimeout;
 517                 struct dentry *dot11MeshConfirmTimeout;
 518                 struct dentry *dot11MeshHoldingTimeout;
 519                 struct dentry *dot11MeshMaxRetries;
 520                 struct dentry *dot11MeshTTL;
 521                 struct dentry *auto_open_plinks;
 522                 struct dentry *dot11MeshMaxPeerLinks;
 523                 struct dentry *dot11MeshHWMPactivePathTimeout;
 524                 struct dentry *dot11MeshHWMPpreqMinInterval;
 525                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 526                 struct dentry *dot11MeshHWMPmaxPREQretries;
 527                 struct dentry *path_refresh_time;
 528                 struct dentry *min_discovery_timeout;
 529         } mesh_config;
 530 #endif
 531
 532 #endif
 533         /* must be last, dynamically sized area in this! */
 534         struct ieee80211_vif vif;
 535 };
 536
 537 static inline
 538 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 539 {
 540         return container_of(p, struct ieee80211_sub_if_data, vif);
 541 }
 542
 543 static inline void
 544 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 545                             u8 mesh_id_len, u8 *mesh_id)
 546 {
 547 #ifdef CONFIG_MAC80211_MESH
 548         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 549         ifmsh->mesh_id_len = mesh_id_len;
 550         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 551 #else
 552         WARN_ON(1);
 553 #endif
 554 }
 555
 556 enum {
 557         IEEE80211_RX_MSG        = 1,
 558         IEEE80211_TX_STATUS_MSG = 2,
 559         IEEE80211_DELBA_MSG     = 3,
 560         IEEE80211_ADDBA_MSG     = 4,
 561 };
 562
 563 enum queue_stop_reason {
 564         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 565         IEEE80211_QUEUE_STOP_REASON_PS,
 566         IEEE80211_QUEUE_STOP_REASON_CSA,
 567         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 568         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 569         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 570 };
 571
 572 /**
 573  * mac80211 scan flags - currently active scan mode
 574  *
 575  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 576  *      well be on the operating channel
 577  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 578  *      determine if we are on the operating channel or not
 579  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 580  *      gets only set in conjunction with SCAN_SW_SCANNING
 581  */
 582 enum {
 583         SCAN_SW_SCANNING,
 584         SCAN_HW_SCANNING,
 585         SCAN_OFF_CHANNEL,
 586 };
 587
 588 /**
 589  * enum mac80211_scan_state - scan state machine states
 590  *
 591  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 592  *      determines if we should keep on scanning or switch back to the
 593  *      operating channel
 594  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 595  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 596  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 597  *      about us leaving the channel and stop all associated STA interfaces
 598  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 599  *      AP about us being back and restart all associated STA interfaces
 600  */
 601 enum mac80211_scan_state {
 602         SCAN_DECISION,
 603         SCAN_SET_CHANNEL,
 604         SCAN_SEND_PROBE,
 605         SCAN_LEAVE_OPER_CHANNEL,
 606         SCAN_ENTER_OPER_CHANNEL,
 607 };
 608
 609 struct ieee80211_local {
 610         /* embed the driver visible part.
 611          * don't cast (use the static inlines below), but we keep
 612          * it first anyway so they become a no-op */
 613         struct ieee80211_hw hw;
 614
 615         const struct ieee80211_ops *ops;
 616
 617         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 618         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 619         spinlock_t queue_stop_reason_lock;
 620
 621         int open_count;
 622         int monitors, cooked_mntrs;
 623         /* number of interfaces with corresponding FIF_ flags */
 624         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 625         unsigned int filter_flags; /* FIF_* */
 626         struct iw_statistics wstats;
 627
 628         /* protects the aggregated multicast list and filter calls */
 629         spinlock_t filter_lock;
 630
 631         /* aggregated multicast list */
 632         struct dev_addr_list *mc_list;
 633         int mc_count;
 634
 635         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 636
 637         /*
 638          * suspended is true if we finished all the suspend _and_ we have
 639          * not yet come up from resume. This is to be used by mac80211
 640          * to ensure driver sanity during suspend and mac80211's own
 641          * sanity. It can eventually be used for WoW as well.
 642          */
 643         bool suspended;
 644
 645         /*
 646          * quiescing is true during the suspend process _only_ to
 647          * ease timer cancelling etc.
 648          */
 649         bool quiescing;
 650
 651         int tx_headroom; /* required headroom for hardware/radiotap */
 652
 653         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 654          * added to skb_queue will be processed, but frames in
 655          * skb_queue_unreliable may be dropped if the total length of these
 656          * queues increases over the limit. */
 657 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 658         struct tasklet_struct tasklet;
 659         struct sk_buff_head skb_queue;
 660         struct sk_buff_head skb_queue_unreliable;
 661
 662         /* Station data */
 663         /*
 664          * The lock only protects the list, hash, timer and counter
 665          * against manipulation, reads are done in RCU. Additionally,
 666          * the lock protects each BSS's TIM bitmap.
 667          */
 668         spinlock_t sta_lock;
 669         unsigned long num_sta;
 670         struct list_head sta_list;
 671         struct sta_info *sta_hash[STA_HASH_SIZE];
 672         struct timer_list sta_cleanup;
 673
 674         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 675         struct tasklet_struct tx_pending_tasklet;
 676
 677         /*
 678          * This lock is used to prevent concurrent A-MPDU
 679          * session start/stop processing, this thus also
 680          * synchronises the ->ampdu_action() callback to
 681          * drivers and limits it to one at a time.
 682          */
 683         spinlock_t ampdu_lock;
 684
 685         /* number of interfaces with corresponding IFF_ flags */
 686         atomic_t iff_allmultis, iff_promiscs;
 687
 688         struct rate_control_ref *rate_ctrl;
 689
 690         struct crypto_blkcipher *wep_tx_tfm;
 691         struct crypto_blkcipher *wep_rx_tfm;
 692         u32 wep_iv;
 693
 694         /* see iface.c */
 695         struct list_head interfaces;
 696         struct mutex iflist_mtx;
 697
 698         /*
 699          * Key lock, protects sdata's key_list and sta_info's
 700          * key pointers (write access, they're RCU.)
 701          */
 702         spinlock_t key_lock;
 703
 704
 705         /* Scanning and BSS list */
 706         struct mutex scan_mtx;
 707         unsigned long scanning;
 708         struct cfg80211_ssid scan_ssid;
 709         struct cfg80211_scan_request int_scan_req;
 710         struct cfg80211_scan_request *scan_req;
 711         struct ieee80211_channel *scan_channel;
 712         const u8 *orig_ies;
 713         int orig_ies_len;
 714         int scan_channel_idx;
 715         int scan_ies_len;
 716
 717         enum mac80211_scan_state next_scan_state;
 718         struct delayed_work scan_work;
 719         struct ieee80211_sub_if_data *scan_sdata;
 720         enum nl80211_channel_type oper_channel_type;
 721         struct ieee80211_channel *oper_channel, *csa_channel;
 722
 723         /* SNMP counters */
 724         /* dot11CountersTable */
 725         u32 dot11TransmittedFragmentCount;
 726         u32 dot11MulticastTransmittedFrameCount;
 727         u32 dot11FailedCount;
 728         u32 dot11RetryCount;
 729         u32 dot11MultipleRetryCount;
 730         u32 dot11FrameDuplicateCount;
 731         u32 dot11ReceivedFragmentCount;
 732         u32 dot11MulticastReceivedFrameCount;
 733         u32 dot11TransmittedFrameCount;
 734
 735 #ifdef CONFIG_MAC80211_LEDS
 736         int tx_led_counter, rx_led_counter;
 737         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 738         char tx_led_name[32], rx_led_name[32],
 739              assoc_led_name[32], radio_led_name[32];
 740 #endif
 741
 742 #ifdef CONFIG_MAC80211_DEBUGFS
 743         struct work_struct sta_debugfs_add;
 744 #endif
 745
 746 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 747         /* TX/RX handler statistics */
 748         unsigned int tx_handlers_drop;
 749         unsigned int tx_handlers_queued;
 750         unsigned int tx_handlers_drop_unencrypted;
 751         unsigned int tx_handlers_drop_fragment;
 752         unsigned int tx_handlers_drop_wep;
 753         unsigned int tx_handlers_drop_not_assoc;
 754         unsigned int tx_handlers_drop_unauth_port;
 755         unsigned int rx_handlers_drop;
 756         unsigned int rx_handlers_queued;
 757         unsigned int rx_handlers_drop_nullfunc;
 758         unsigned int rx_handlers_drop_defrag;
 759         unsigned int rx_handlers_drop_short;
 760         unsigned int rx_handlers_drop_passive_scan;
 761         unsigned int tx_expand_skb_head;
 762         unsigned int tx_expand_skb_head_cloned;
 763         unsigned int rx_expand_skb_head;
 764         unsigned int rx_expand_skb_head2;
 765         unsigned int rx_handlers_fragments;
 766         unsigned int tx_status_drop;
 767 #define I802_DEBUG_INC(c) (c)++
 768 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 769 #define I802_DEBUG_INC(c) do { } while (0)
 770 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 771
 772
 773         int total_ps_buffered; /* total number of all buffered unicast and
 774                                 * multicast packets for power saving stations
 775                                 */
 776         int wifi_wme_noack_test;
 777         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 778
 779         bool pspolling;
 780         /*
 781          * PS can only be enabled when we have exactly one managed
 782          * interface (and monitors) in PS, this then points there.
 783          */
 784         struct ieee80211_sub_if_data *ps_sdata;
 785         struct work_struct dynamic_ps_enable_work;
 786         struct work_struct dynamic_ps_disable_work;
 787         struct timer_list dynamic_ps_timer;
 788         struct notifier_block network_latency_notifier;
 789
 790         int user_power_level; /* in dBm */
 791         int power_constr_level; /* in dBm */
 792
 793         struct work_struct restart_work;
 794
 795 #ifdef CONFIG_MAC80211_DEBUGFS
 796         struct local_debugfsdentries {
 797                 struct dentry *rcdir;
 798                 struct dentry *rcname;
 799                 struct dentry *frequency;
 800                 struct dentry *total_ps_buffered;
 801                 struct dentry *wep_iv;
 802                 struct dentry *tsf;
 803                 struct dentry *queues;
 804                 struct dentry *reset;
 805                 struct dentry *noack;
 806                 struct dentry *statistics;
 807                 struct local_debugfsdentries_statsdentries {
 808                         struct dentry *transmitted_fragment_count;
 809                         struct dentry *multicast_transmitted_frame_count;
 810                         struct dentry *failed_count;
 811                         struct dentry *retry_count;
 812                         struct dentry *multiple_retry_count;
 813                         struct dentry *frame_duplicate_count;
 814                         struct dentry *received_fragment_count;
 815                         struct dentry *multicast_received_frame_count;
 816                         struct dentry *transmitted_frame_count;
 817                         struct dentry *wep_undecryptable_count;
 818                         struct dentry *num_scans;
 819 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 820                         struct dentry *tx_handlers_drop;
 821                         struct dentry *tx_handlers_queued;
 822                         struct dentry *tx_handlers_drop_unencrypted;
 823                         struct dentry *tx_handlers_drop_fragment;
 824                         struct dentry *tx_handlers_drop_wep;
 825                         struct dentry *tx_handlers_drop_not_assoc;
 826                         struct dentry *tx_handlers_drop_unauth_port;
 827                         struct dentry *rx_handlers_drop;
 828                         struct dentry *rx_handlers_queued;
 829                         struct dentry *rx_handlers_drop_nullfunc;
 830                         struct dentry *rx_handlers_drop_defrag;
 831                         struct dentry *rx_handlers_drop_short;
 832                         struct dentry *rx_handlers_drop_passive_scan;
 833                         struct dentry *tx_expand_skb_head;
 834                         struct dentry *tx_expand_skb_head_cloned;
 835                         struct dentry *rx_expand_skb_head;
 836                         struct dentry *rx_expand_skb_head2;
 837                         struct dentry *rx_handlers_fragments;
 838                         struct dentry *tx_status_drop;
 839 #endif
 840                         struct dentry *dot11ACKFailureCount;
 841                         struct dentry *dot11RTSFailureCount;
 842                         struct dentry *dot11FCSErrorCount;
 843                         struct dentry *dot11RTSSuccessCount;
 844                 } stats;
 845                 struct dentry *stations;
 846                 struct dentry *keys;
 847         } debugfs;
 848 #endif
 849 };
 850
 851 static inline struct ieee80211_sub_if_data *
 852 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 853 {
 854         return netdev_priv(dev);
 855 }
 856
 857 /* this struct represents 802.11n's RA/TID combination */
 858 struct ieee80211_ra_tid {
 859         u8 ra[ETH_ALEN];
 860         u16 tid;
 861 };
 862
 863 /* Parsed Information Elements */
 864 struct ieee802_11_elems {
 865         u8 *ie_start;
 866         size_t total_len;
 867
 868         /* pointers to IEs */
 869         u8 *ssid;
 870         u8 *supp_rates;
 871         u8 *fh_params;
 872         u8 *ds_params;
 873         u8 *cf_params;
 874         struct ieee80211_tim_ie *tim;
 875         u8 *ibss_params;
 876         u8 *challenge;
 877         u8 *wpa;
 878         u8 *rsn;
 879         u8 *erp_info;
 880         u8 *ext_supp_rates;
 881         u8 *wmm_info;
 882         u8 *wmm_param;
 883         struct ieee80211_ht_cap *ht_cap_elem;
 884         struct ieee80211_ht_info *ht_info_elem;
 885         u8 *mesh_config;
 886         u8 *mesh_id;
 887         u8 *peer_link;
 888         u8 *preq;
 889         u8 *prep;
 890         u8 *perr;
 891         u8 *ch_switch_elem;
 892         u8 *country_elem;
 893         u8 *pwr_constr_elem;
 894         u8 *quiet_elem;         /* first quite element */
 895         u8 *timeout_int;
 896
 897         /* length of them, respectively */
 898         u8 ssid_len;
 899         u8 supp_rates_len;
 900         u8 fh_params_len;
 901         u8 ds_params_len;
 902         u8 cf_params_len;
 903         u8 tim_len;
 904         u8 ibss_params_len;
 905         u8 challenge_len;
 906         u8 wpa_len;
 907         u8 rsn_len;
 908         u8 erp_info_len;
 909         u8 ext_supp_rates_len;
 910         u8 wmm_info_len;
 911         u8 wmm_param_len;
 912         u8 mesh_config_len;
 913         u8 mesh_id_len;
 914         u8 peer_link_len;
 915         u8 preq_len;
 916         u8 prep_len;
 917         u8 perr_len;
 918         u8 ch_switch_elem_len;
 919         u8 country_elem_len;
 920         u8 pwr_constr_elem_len;
 921         u8 quiet_elem_len;
 922         u8 num_of_quiet_elem;   /* can be more the one */
 923         u8 timeout_int_len;
 924 };
 925
 926 static inline struct ieee80211_local *hw_to_local(
 927         struct ieee80211_hw *hw)
 928 {
 929         return container_of(hw, struct ieee80211_local, hw);
 930 }
 931
 932 static inline struct ieee80211_hw *local_to_hw(
 933         struct ieee80211_local *local)
 934 {
 935         return &local->hw;
 936 }
 937
 938
 939 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 940 {
 941         return compare_ether_addr(raddr, addr) == 0 ||
 942                is_broadcast_ether_addr(raddr);
 943 }
 944
 945
 946 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 947 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 948 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 949                                       u32 changed);
 950 void ieee80211_configure_filter(struct ieee80211_local *local);
 951 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 952
 953 /* STA code */
 954 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 955 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
 956                        struct cfg80211_auth_request *req);
 957 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 958                         struct cfg80211_assoc_request *req);
 959 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 960                          struct cfg80211_deauth_request *req,
 961                          void *cookie);
 962 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
 963                            struct cfg80211_disassoc_request *req,
 964                            void *cookie);
 965 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 966                                           struct sk_buff *skb);
 967 void ieee80211_send_pspoll(struct ieee80211_local *local,
 968                            struct ieee80211_sub_if_data *sdata);
 969 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 970 int ieee80211_max_network_latency(struct notifier_block *nb,
 971                                   unsigned long data, void *dummy);
 972 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 973                                       struct ieee80211_channel_sw_ie *sw_elem,
 974                                       struct ieee80211_bss *bss);
 975 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 976 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 977
 978 /* IBSS code */
 979 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 980 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 981 ieee80211_rx_result
 982 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 983 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 984                                         u8 *bssid, u8 *addr, u32 supp_rates);
 985 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 986                         struct cfg80211_ibss_params *params);
 987 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 988 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 989 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 990
 991 /* scan/BSS handling */
 992 void ieee80211_scan_work(struct work_struct *work);
 993 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
 994                                     const u8 *ssid, u8 ssid_len);
 995 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 996                            struct cfg80211_scan_request *req);
 997 void ieee80211_scan_cancel(struct ieee80211_local *local);
 998 ieee80211_rx_result
 999 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1000
1001 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1002 struct ieee80211_bss *
1003 ieee80211_bss_info_update(struct ieee80211_local *local,
1004                           struct ieee80211_rx_status *rx_status,
1005                           struct ieee80211_mgmt *mgmt,
1006                           size_t len,
1007                           struct ieee802_11_elems *elems,
1008                           struct ieee80211_channel *channel,
1009                           bool beacon);
1010 struct ieee80211_bss *
1011 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1012                      u8 *ssid, u8 ssid_len);
1013 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1014                           struct ieee80211_bss *bss);
1015
1016 /* interface handling */
1017 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1018                      struct net_device **new_dev, enum nl80211_iftype type,
1019                      struct vif_params *params);
1020 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1021                              enum nl80211_iftype type);
1022 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1023 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1024 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1025 void ieee80211_recalc_idle(struct ieee80211_local *local);
1026
1027 /* tx handling */
1028 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1029 void ieee80211_tx_pending(unsigned long data);
1030 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
1031 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
1032
1033 /* HT */
1034 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1035                                        struct ieee80211_ht_cap *ht_cap_ie,
1036                                        struct ieee80211_sta_ht_cap *ht_cap);
1037 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1038 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1039                           const u8 *da, u16 tid,
1040                           u16 initiator, u16 reason_code);
1041
1042 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
1043                                 u16 tid, u16 initiator, u16 reason);
1044 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1045                                     u16 initiator, u16 reason);
1046 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1047 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1048                              struct sta_info *sta,
1049                              struct ieee80211_mgmt *mgmt, size_t len);
1050 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1051                                   struct sta_info *sta,
1052                                   struct ieee80211_mgmt *mgmt,
1053                                   size_t len);
1054 void ieee80211_process_addba_request(struct ieee80211_local *local,
1055                                      struct sta_info *sta,
1056                                      struct ieee80211_mgmt *mgmt,
1057                                      size_t len);
1058
1059 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1060                                    enum ieee80211_back_parties initiator);
1061
1062 /* Spectrum management */
1063 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1064                                        struct ieee80211_mgmt *mgmt,
1065                                        size_t len);
1066
1067 /* Suspend/resume and hw reconfiguration */
1068 int ieee80211_reconfig(struct ieee80211_local *local);
1069
1070 #ifdef CONFIG_PM
1071 int __ieee80211_suspend(struct ieee80211_hw *hw);
1072
1073 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1074 {
1075         return ieee80211_reconfig(hw_to_local(hw));
1076 }
1077 #else
1078 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1079 {
1080         return 0;
1081 }
1082
1083 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1084 {
1085         return 0;
1086 }
1087 #endif
1088
1089 /* utility functions/constants */
1090 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1091 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1092                         enum nl80211_iftype type);
1093 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1094                              int rate, int erp, int short_preamble);
1095 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1096                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1097                                      gfp_t gfp);
1098 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1099 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1100                       int encrypt);
1101 void ieee802_11_parse_elems(u8 *start, size_t len,
1102                             struct ieee802_11_elems *elems);
1103 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1104                                struct ieee802_11_elems *elems,
1105                                u64 filter, u32 crc);
1106 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1107                               enum ieee80211_band band);
1108
1109 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1110 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1111 void ieee80211_dynamic_ps_timer(unsigned long data);
1112 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1113                              struct ieee80211_sub_if_data *sdata,
1114                              int powersave);
1115 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1116                              struct ieee80211_hdr *hdr);
1117 void ieee80211_beacon_loss_work(struct work_struct *work);
1118
1119 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1120                                      enum queue_stop_reason reason);
1121 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1122                                      enum queue_stop_reason reason);
1123 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1124                                     enum queue_stop_reason reason);
1125 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1126                                     enum queue_stop_reason reason);
1127 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1128                                struct sk_buff *skb);
1129 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1130                                struct sk_buff_head *skbs);
1131
1132 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1133                          u16 transaction, u16 auth_alg,
1134                          u8 *extra, size_t extra_len, const u8 *bssid,
1135                          const u8 *key, u8 key_len, u8 key_idx);
1136 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1137                              const u8 *ie, size_t ie_len);
1138 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1139                               const u8 *ssid, size_t ssid_len,
1140                               const u8 *ie, size_t ie_len);
1141
1142 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1143                                   const size_t supp_rates_len,
1144                                   const u8 *supp_rates);
1145 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1146                             struct ieee802_11_elems *elems,
1147                             enum ieee80211_band band);
1148
1149 #ifdef CONFIG_MAC80211_NOINLINE
1150 #define debug_noinline noinline
1151 #else
1152 #define debug_noinline
1153 #endif
1154
1155 #endif /* IEEE80211_I_H */