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 2007-2010  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/ieee80211_radiotap.h>
  27 #include <net/cfg80211.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 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  54
  55 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
  56         (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK |   \
  57          IEEE80211_WMM_IE_STA_QOSINFO_AC_BE |   \
  58          IEEE80211_WMM_IE_STA_QOSINFO_AC_VI |   \
  59          IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
  60
  61 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  62         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  63
  64 struct ieee80211_fragment_entry {
  65         unsigned long first_frag_time;
  66         unsigned int seq;
  67         unsigned int rx_queue;
  68         unsigned int last_frag;
  69         unsigned int extra_len;
  70         struct sk_buff_head skb_list;
  71         int ccmp; /* Whether fragments were encrypted with CCMP */
  72         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  73 };
  74
  75
  76 struct ieee80211_bss {
  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         bool uapsd_supported;
  85
  86         unsigned long last_probe_resp;
  87
  88 #ifdef CONFIG_MAC80211_MESH
  89         u8 *mesh_id;
  90         size_t mesh_id_len;
  91         u8 *mesh_cfg;
  92 #endif
  93
  94 #define IEEE80211_MAX_SUPP_RATES 32
  95         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  96         size_t supp_rates_len;
  97
  98         /*
  99          * During assocation, we save an ERP value from a probe response so
 100          * that we can feed ERP info to the driver when handling the
 101          * association completes. these fields probably won't be up-to-date
 102          * otherwise, you probably don't want to use them.
 103          */
 104         bool has_erp_value;
 105         u8 erp_value;
 106 };
 107
 108 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 109 {
 110 #ifdef CONFIG_MAC80211_MESH
 111         return bss->mesh_cfg;
 112 #endif
 113         return NULL;
 114 }
 115
 116 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 117 {
 118 #ifdef CONFIG_MAC80211_MESH
 119         return bss->mesh_id;
 120 #endif
 121         return NULL;
 122 }
 123
 124 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 125 {
 126 #ifdef CONFIG_MAC80211_MESH
 127         return bss->mesh_id_len;
 128 #endif
 129         return 0;
 130 }
 131
 132
 133 typedef unsigned __bitwise__ ieee80211_tx_result;
 134 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 135 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 136 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 137
 138 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 139 #define IEEE80211_TX_UNICAST            BIT(1)
 140 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 141
 142 struct ieee80211_tx_data {
 143         struct sk_buff *skb;
 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 /**
 163  * enum ieee80211_packet_rx_flags - packet RX flags
 164  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
 165  *      (incl. multicast frames)
 166  * @IEEE80211_RX_IN_SCAN: received while scanning
 167  * @IEEE80211_RX_FRAGMENTED: fragmented frame
 168  * @IEEE80211_RX_AMSDU: a-MSDU packet
 169  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 170  *
 171  * These are per-frame flags that are attached to a frame in the
 172  * @rx_flags field of &struct ieee80211_rx_status.
 173  */
 174 enum ieee80211_packet_rx_flags {
 175         IEEE80211_RX_IN_SCAN                    = BIT(0),
 176         IEEE80211_RX_RA_MATCH                   = BIT(1),
 177         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 178         IEEE80211_RX_AMSDU                      = BIT(3),
 179         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 180 };
 181
 182 /**
 183  * enum ieee80211_rx_flags - RX data flags
 184  *
 185  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 186  *
 187  * These flags are used across handling multiple interfaces
 188  * for a single frame.
 189  */
 190 enum ieee80211_rx_flags {
 191         IEEE80211_RX_CMNTR              = BIT(0),
 192 };
 193
 194 struct ieee80211_rx_data {
 195         struct sk_buff *skb;
 196         struct ieee80211_local *local;
 197         struct ieee80211_sub_if_data *sdata;
 198         struct sta_info *sta;
 199         struct ieee80211_key *key;
 200
 201         unsigned int flags;
 202         int queue;
 203         u32 tkip_iv32;
 204         u16 tkip_iv16;
 205 };
 206
 207 struct beacon_data {
 208         u8 *head, *tail;
 209         int head_len, tail_len;
 210         int dtim_period;
 211 };
 212
 213 struct ieee80211_if_ap {
 214         struct beacon_data *beacon;
 215
 216         struct list_head vlans;
 217
 218         /* yes, this looks ugly, but guarantees that we can later use
 219          * bitmap_empty :)
 220          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 221         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 222         struct sk_buff_head ps_bc_buf;
 223         atomic_t num_sta_ps; /* number of stations in PS mode */
 224         int dtim_count;
 225 };
 226
 227 struct ieee80211_if_wds {
 228         struct sta_info *sta;
 229         u8 remote_addr[ETH_ALEN];
 230 };
 231
 232 struct ieee80211_if_vlan {
 233         struct list_head list;
 234
 235         /* used for all tx if the VLAN is configured to 4-addr mode */
 236         struct sta_info *sta;
 237 };
 238
 239 struct mesh_stats {
 240         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 241         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 242         __u32 fwded_frames;             /* Mesh total forwarded frames */
 243         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 244         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 245         atomic_t estab_plinks;
 246 };
 247
 248 #define PREQ_Q_F_START          0x1
 249 #define PREQ_Q_F_REFRESH        0x2
 250 struct mesh_preq_queue {
 251         struct list_head list;
 252         u8 dst[ETH_ALEN];
 253         u8 flags;
 254 };
 255
 256 enum ieee80211_work_type {
 257         IEEE80211_WORK_ABORT,
 258         IEEE80211_WORK_DIRECT_PROBE,
 259         IEEE80211_WORK_AUTH,
 260         IEEE80211_WORK_ASSOC_BEACON_WAIT,
 261         IEEE80211_WORK_ASSOC,
 262         IEEE80211_WORK_REMAIN_ON_CHANNEL,
 263         IEEE80211_WORK_OFFCHANNEL_TX,
 264 };
 265
 266 /**
 267  * enum work_done_result - indicates what to do after work was done
 268  *
 269  * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
 270  * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
 271  *      should be requeued.
 272  */
 273 enum work_done_result {
 274         WORK_DONE_DESTROY,
 275         WORK_DONE_REQUEUE,
 276 };
 277
 278 struct ieee80211_work {
 279         struct list_head list;
 280
 281         struct rcu_head rcu_head;
 282
 283         struct ieee80211_sub_if_data *sdata;
 284
 285         enum work_done_result (*done)(struct ieee80211_work *wk,
 286                                       struct sk_buff *skb);
 287
 288         struct ieee80211_channel *chan;
 289         enum nl80211_channel_type chan_type;
 290
 291         unsigned long timeout;
 292         enum ieee80211_work_type type;
 293
 294         u8 filter_ta[ETH_ALEN];
 295
 296         bool started;
 297
 298         union {
 299                 struct {
 300                         int tries;
 301                         u16 algorithm, transaction;
 302                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 303                         u8 ssid_len;
 304                         u8 key[WLAN_KEY_LEN_WEP104];
 305                         u8 key_len, key_idx;
 306                         bool privacy;
 307                 } probe_auth;
 308                 struct {
 309                         struct cfg80211_bss *bss;
 310                         const u8 *supp_rates;
 311                         const u8 *ht_information_ie;
 312                         enum ieee80211_smps_mode smps;
 313                         int tries;
 314                         u16 capability;
 315                         u8 prev_bssid[ETH_ALEN];
 316                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 317                         u8 ssid_len;
 318                         u8 supp_rates_len;
 319                         bool wmm_used, use_11n, uapsd_used;
 320                 } assoc;
 321                 struct {
 322                         u32 duration;
 323                 } remain;
 324                 struct {
 325                         struct sk_buff *frame;
 326                         u32 wait;
 327                 } offchan_tx;
 328         };
 329
 330         int ie_len;
 331         /* must be last */
 332         u8 ie[0];
 333 };
 334
 335 /* flags used in struct ieee80211_if_managed.flags */
 336 enum ieee80211_sta_flags {
 337         IEEE80211_STA_BEACON_POLL       = BIT(0),
 338         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 339         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 340         IEEE80211_STA_DISABLE_11N       = BIT(4),
 341         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 342         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 343         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 344         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 345         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 346 };
 347
 348 struct ieee80211_if_managed {
 349         struct timer_list timer;
 350         struct timer_list conn_mon_timer;
 351         struct timer_list bcn_mon_timer;
 352         struct timer_list chswitch_timer;
 353         struct work_struct monitor_work;
 354         struct work_struct chswitch_work;
 355         struct work_struct beacon_connection_loss_work;
 356
 357         unsigned long beacon_timeout;
 358         unsigned long probe_timeout;
 359         int probe_send_count;
 360         bool nullfunc_failed;
 361
 362         struct mutex mtx;
 363         struct cfg80211_bss *associated;
 364
 365         u8 bssid[ETH_ALEN];
 366
 367         u16 aid;
 368
 369         unsigned long timers_running; /* used for quiesce/restart */
 370         bool powersave; /* powersave requested for this iface */
 371         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 372                                  ap_smps, /* smps mode AP thinks we're in */
 373                                  driver_smps_mode; /* smps mode request */
 374
 375         struct work_struct request_smps_work;
 376
 377         unsigned int flags;
 378
 379         bool beacon_crc_valid;
 380         u32 beacon_crc;
 381
 382         enum {
 383                 IEEE80211_MFP_DISABLED,
 384                 IEEE80211_MFP_OPTIONAL,
 385                 IEEE80211_MFP_REQUIRED
 386         } mfp; /* management frame protection */
 387
 388         int wmm_last_param_set;
 389
 390         u8 use_4addr;
 391
 392         /* Signal strength from the last Beacon frame in the current BSS. */
 393         int last_beacon_signal;
 394
 395         /*
 396          * Weighted average of the signal strength from Beacon frames in the
 397          * current BSS. This is in units of 1/16 of the signal unit to maintain
 398          * accuracy and to speed up calculations, i.e., the value need to be
 399          * divided by 16 to get the actual value.
 400          */
 401         int ave_beacon_signal;
 402
 403         /*
 404          * Number of Beacon frames used in ave_beacon_signal. This can be used
 405          * to avoid generating less reliable cqm events that would be based
 406          * only on couple of received frames.
 407          */
 408         unsigned int count_beacon_signal;
 409
 410         /*
 411          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 412          * that triggered a cqm event. 0 indicates that no event has been
 413          * generated for the current association.
 414          */
 415         int last_cqm_event_signal;
 416 };
 417
 418 struct ieee80211_if_ibss {
 419         struct timer_list timer;
 420
 421         struct mutex mtx;
 422
 423         unsigned long last_scan_completed;
 424
 425         u32 basic_rates;
 426
 427         bool timer_running;
 428
 429         bool fixed_bssid;
 430         bool fixed_channel;
 431         bool privacy;
 432
 433         u8 bssid[ETH_ALEN];
 434         u8 ssid[IEEE80211_MAX_SSID_LEN];
 435         u8 ssid_len, ie_len;
 436         u8 *ie;
 437         struct ieee80211_channel *channel;
 438
 439         unsigned long ibss_join_req;
 440         /* probe response/beacon for IBSS */
 441         struct sk_buff *presp, *skb;
 442
 443         enum {
 444                 IEEE80211_IBSS_MLME_SEARCH,
 445                 IEEE80211_IBSS_MLME_JOINED,
 446         } state;
 447 };
 448
 449 struct ieee80211_if_mesh {
 450         struct timer_list housekeeping_timer;
 451         struct timer_list mesh_path_timer;
 452         struct timer_list mesh_path_root_timer;
 453
 454         unsigned long timers_running;
 455
 456         unsigned long wrkq_flags;
 457
 458         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 459         size_t mesh_id_len;
 460         /* Active Path Selection Protocol Identifier */
 461         u8 mesh_pp_id;
 462         /* Active Path Selection Metric Identifier */
 463         u8 mesh_pm_id;
 464         /* Congestion Control Mode Identifier */
 465         u8 mesh_cc_id;
 466         /* Synchronization Protocol Identifier */
 467         u8 mesh_sp_id;
 468         /* Authentication Protocol Identifier */
 469         u8 mesh_auth_id;
 470         /* Local mesh Sequence Number */
 471         u32 sn;
 472         /* Last used PREQ ID */
 473         u32 preq_id;
 474         atomic_t mpaths;
 475         /* Timestamp of last SN update */
 476         unsigned long last_sn_update;
 477         /* Timestamp of last SN sent */
 478         unsigned long last_preq;
 479         struct mesh_rmc *rmc;
 480         spinlock_t mesh_preq_queue_lock;
 481         struct mesh_preq_queue preq_queue;
 482         int preq_queue_len;
 483         struct mesh_stats mshstats;
 484         struct mesh_config mshcfg;
 485         u32 mesh_seqnum;
 486         bool accepting_plinks;
 487 };
 488
 489 #ifdef CONFIG_MAC80211_MESH
 490 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 491         do { (msh)->mshstats.name++; } while (0)
 492 #else
 493 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 494         do { } while (0)
 495 #endif
 496
 497 /**
 498  * enum ieee80211_sub_if_data_flags - virtual interface flags
 499  *
 500  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 501  * @IEEE80211_SDATA_PROMISC: interface is promisc
 502  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 503  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 504  *      associated stations and deliver multicast frames both
 505  *      back to wireless media and to the local net stack.
 506  */
 507 enum ieee80211_sub_if_data_flags {
 508         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 509         IEEE80211_SDATA_PROMISC                 = BIT(1),
 510         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 511         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 512 };
 513
 514 /**
 515  * enum ieee80211_sdata_state_bits - virtual interface state bits
 516  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 517  *      mirrors netif_running() but is separate for interface type
 518  *      change handling while the interface is up
 519  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 520  *      mode, so queues are stopped
 521  */
 522 enum ieee80211_sdata_state_bits {
 523         SDATA_STATE_RUNNING,
 524         SDATA_STATE_OFFCHANNEL,
 525 };
 526
 527 struct ieee80211_sub_if_data {
 528         struct list_head list;
 529
 530         struct wireless_dev wdev;
 531
 532         /* keys */
 533         struct list_head key_list;
 534
 535         struct net_device *dev;
 536         struct ieee80211_local *local;
 537
 538         unsigned int flags;
 539
 540         unsigned long state;
 541
 542         int drop_unencrypted;
 543
 544         char name[IFNAMSIZ];
 545
 546         /*
 547          * keep track of whether the HT opmode (stored in
 548          * vif.bss_info.ht_operation_mode) is valid.
 549          */
 550         bool ht_opmode_valid;
 551
 552         /* to detect idle changes */
 553         bool old_idle;
 554
 555         /* Fragment table for host-based reassembly */
 556         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 557         unsigned int fragment_next;
 558
 559         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 560         struct ieee80211_key *default_unicast_key, *default_multicast_key;
 561         struct ieee80211_key *default_mgmt_key;
 562
 563         u16 sequence_number;
 564         __be16 control_port_protocol;
 565         bool control_port_no_encrypt;
 566
 567         struct work_struct work;
 568         struct sk_buff_head skb_queue;
 569
 570         bool arp_filter_state;
 571
 572         /*
 573          * AP this belongs to: self in AP mode and
 574          * corresponding AP in VLAN mode, NULL for
 575          * all others (might be needed later in IBSS)
 576          */
 577         struct ieee80211_if_ap *bss;
 578
 579         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 580         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 581
 582         union {
 583                 struct ieee80211_if_ap ap;
 584                 struct ieee80211_if_wds wds;
 585                 struct ieee80211_if_vlan vlan;
 586                 struct ieee80211_if_managed mgd;
 587                 struct ieee80211_if_ibss ibss;
 588 #ifdef CONFIG_MAC80211_MESH
 589                 struct ieee80211_if_mesh mesh;
 590 #endif
 591                 u32 mntr_flags;
 592         } u;
 593
 594 #ifdef CONFIG_MAC80211_DEBUGFS
 595         struct {
 596                 struct dentry *dir;
 597                 struct dentry *subdir_stations;
 598                 struct dentry *default_unicast_key;
 599                 struct dentry *default_multicast_key;
 600                 struct dentry *default_mgmt_key;
 601         } debugfs;
 602 #endif
 603         /* must be last, dynamically sized area in this! */
 604         struct ieee80211_vif vif;
 605 };
 606
 607 static inline
 608 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 609 {
 610         return container_of(p, struct ieee80211_sub_if_data, vif);
 611 }
 612
 613 enum sdata_queue_type {
 614         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 615         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 616         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 617 };
 618
 619 enum {
 620         IEEE80211_RX_MSG        = 1,
 621         IEEE80211_TX_STATUS_MSG = 2,
 622 };
 623
 624 enum queue_stop_reason {
 625         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 626         IEEE80211_QUEUE_STOP_REASON_PS,
 627         IEEE80211_QUEUE_STOP_REASON_CSA,
 628         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 629         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 630         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 631 };
 632
 633 /**
 634  * mac80211 scan flags - currently active scan mode
 635  *
 636  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 637  *      well be on the operating channel
 638  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 639  *      determine if we are on the operating channel or not
 640  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 641  *      gets only set in conjunction with SCAN_SW_SCANNING
 642  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 643  *      that the scan completed.
 644  * @SCAN_ABORTED: Set for our scan work function when the driver reported
 645  *      a scan complete for an aborted scan.
 646  */
 647 enum {
 648         SCAN_SW_SCANNING,
 649         SCAN_HW_SCANNING,
 650         SCAN_OFF_CHANNEL,
 651         SCAN_COMPLETED,
 652         SCAN_ABORTED,
 653 };
 654
 655 /**
 656  * enum mac80211_scan_state - scan state machine states
 657  *
 658  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 659  *      determines if we should keep on scanning or switch back to the
 660  *      operating channel
 661  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 662  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 663  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 664  *      about us leaving the channel and stop all associated STA interfaces
 665  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 666  *      AP about us being back and restart all associated STA interfaces
 667  */
 668 enum mac80211_scan_state {
 669         SCAN_DECISION,
 670         SCAN_SET_CHANNEL,
 671         SCAN_SEND_PROBE,
 672         SCAN_LEAVE_OPER_CHANNEL,
 673         SCAN_ENTER_OPER_CHANNEL,
 674 };
 675
 676 struct ieee80211_local {
 677         /* embed the driver visible part.
 678          * don't cast (use the static inlines below), but we keep
 679          * it first anyway so they become a no-op */
 680         struct ieee80211_hw hw;
 681
 682         const struct ieee80211_ops *ops;
 683
 684         /*
 685          * work stuff, potentially off-channel (in the future)
 686          */
 687         struct list_head work_list;
 688         struct timer_list work_timer;
 689         struct work_struct work_work;
 690         struct sk_buff_head work_skb_queue;
 691
 692         /*
 693          * private workqueue to mac80211. mac80211 makes this accessible
 694          * via ieee80211_queue_work()
 695          */
 696         struct workqueue_struct *workqueue;
 697
 698         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 699         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 700         spinlock_t queue_stop_reason_lock;
 701
 702         int open_count;
 703         int monitors, cooked_mntrs;
 704         /* number of interfaces with corresponding FIF_ flags */
 705         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 706             fif_probe_req;
 707         int probe_req_reg;
 708         unsigned int filter_flags; /* FIF_* */
 709
 710         bool wiphy_ciphers_allocated;
 711
 712         /* protects the aggregated multicast list and filter calls */
 713         spinlock_t filter_lock;
 714
 715         /* used for uploading changed mc list */
 716         struct work_struct reconfig_filter;
 717
 718         /* used to reconfigure hardware SM PS */
 719         struct work_struct recalc_smps;
 720
 721         /* aggregated multicast list */
 722         struct netdev_hw_addr_list mc_list;
 723
 724         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 725
 726         /*
 727          * suspended is true if we finished all the suspend _and_ we have
 728          * not yet come up from resume. This is to be used by mac80211
 729          * to ensure driver sanity during suspend and mac80211's own
 730          * sanity. It can eventually be used for WoW as well.
 731          */
 732         bool suspended;
 733
 734         /*
 735          * Resuming is true while suspended, but when we're reprogramming the
 736          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 737          * again even though some other parts of the stack are still suspended
 738          * and we still drop received frames to avoid waking the stack.
 739          */
 740         bool resuming;
 741
 742         /*
 743          * quiescing is true during the suspend process _only_ to
 744          * ease timer cancelling etc.
 745          */
 746         bool quiescing;
 747
 748         /* device is started */
 749         bool started;
 750
 751         int tx_headroom; /* required headroom for hardware/radiotap */
 752
 753         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 754          * added to skb_queue will be processed, but frames in
 755          * skb_queue_unreliable may be dropped if the total length of these
 756          * queues increases over the limit. */
 757 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 758         struct tasklet_struct tasklet;
 759         struct sk_buff_head skb_queue;
 760         struct sk_buff_head skb_queue_unreliable;
 761
 762         /* Station data */
 763         /*
 764          * The mutex only protects the list and counter,
 765          * reads are done in RCU.
 766          * Additionally, the lock protects the hash table,
 767          * the pending list and each BSS's TIM bitmap.
 768          */
 769         struct mutex sta_mtx;
 770         spinlock_t sta_lock;
 771         unsigned long num_sta;
 772         struct list_head sta_list, sta_pending_list;
 773         struct sta_info *sta_hash[STA_HASH_SIZE];
 774         struct timer_list sta_cleanup;
 775         struct work_struct sta_finish_work;
 776         int sta_generation;
 777
 778         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 779         struct tasklet_struct tx_pending_tasklet;
 780
 781         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 782
 783         /* number of interfaces with corresponding IFF_ flags */
 784         atomic_t iff_allmultis, iff_promiscs;
 785
 786         struct rate_control_ref *rate_ctrl;
 787
 788         struct crypto_blkcipher *wep_tx_tfm;
 789         struct crypto_blkcipher *wep_rx_tfm;
 790         u32 wep_iv;
 791
 792         /* see iface.c */
 793         struct list_head interfaces;
 794         struct mutex iflist_mtx;
 795
 796         /*
 797          * Key mutex, protects sdata's key_list and sta_info's
 798          * key pointers (write access, they're RCU.)
 799          */
 800         struct mutex key_mtx;
 801
 802         /* mutex for scan and work locking */
 803         struct mutex mtx;
 804
 805         /* Scanning and BSS list */
 806         unsigned long scanning;
 807         struct cfg80211_ssid scan_ssid;
 808         struct cfg80211_scan_request *int_scan_req;
 809         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 810         struct ieee80211_channel *scan_channel;
 811         enum ieee80211_band hw_scan_band;
 812         int scan_channel_idx;
 813         int scan_ies_len;
 814
 815         unsigned long leave_oper_channel_time;
 816         enum mac80211_scan_state next_scan_state;
 817         struct delayed_work scan_work;
 818         struct ieee80211_sub_if_data *scan_sdata;
 819         enum nl80211_channel_type _oper_channel_type;
 820         struct ieee80211_channel *oper_channel, *csa_channel;
 821
 822         /* Temporary remain-on-channel for off-channel operations */
 823         struct ieee80211_channel *tmp_channel;
 824         enum nl80211_channel_type tmp_channel_type;
 825
 826         /* SNMP counters */
 827         /* dot11CountersTable */
 828         u32 dot11TransmittedFragmentCount;
 829         u32 dot11MulticastTransmittedFrameCount;
 830         u32 dot11FailedCount;
 831         u32 dot11RetryCount;
 832         u32 dot11MultipleRetryCount;
 833         u32 dot11FrameDuplicateCount;
 834         u32 dot11ReceivedFragmentCount;
 835         u32 dot11MulticastReceivedFrameCount;
 836         u32 dot11TransmittedFrameCount;
 837
 838 #ifdef CONFIG_MAC80211_LEDS
 839         int tx_led_counter, rx_led_counter;
 840         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 841         char tx_led_name[32], rx_led_name[32],
 842              assoc_led_name[32], radio_led_name[32];
 843 #endif
 844
 845 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 846         /* TX/RX handler statistics */
 847         unsigned int tx_handlers_drop;
 848         unsigned int tx_handlers_queued;
 849         unsigned int tx_handlers_drop_unencrypted;
 850         unsigned int tx_handlers_drop_fragment;
 851         unsigned int tx_handlers_drop_wep;
 852         unsigned int tx_handlers_drop_not_assoc;
 853         unsigned int tx_handlers_drop_unauth_port;
 854         unsigned int rx_handlers_drop;
 855         unsigned int rx_handlers_queued;
 856         unsigned int rx_handlers_drop_nullfunc;
 857         unsigned int rx_handlers_drop_defrag;
 858         unsigned int rx_handlers_drop_short;
 859         unsigned int rx_handlers_drop_passive_scan;
 860         unsigned int tx_expand_skb_head;
 861         unsigned int tx_expand_skb_head_cloned;
 862         unsigned int rx_expand_skb_head;
 863         unsigned int rx_expand_skb_head2;
 864         unsigned int rx_handlers_fragments;
 865         unsigned int tx_status_drop;
 866 #define I802_DEBUG_INC(c) (c)++
 867 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 868 #define I802_DEBUG_INC(c) do { } while (0)
 869 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 870
 871
 872         int total_ps_buffered; /* total number of all buffered unicast and
 873                                 * multicast packets for power saving stations
 874                                 */
 875         int wifi_wme_noack_test;
 876         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 877
 878         /*
 879          * Bitmask of enabled u-apsd queues,
 880          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 881          * to take effect.
 882          */
 883         unsigned int uapsd_queues;
 884
 885         /*
 886          * Maximum number of buffered frames AP can deliver during a
 887          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 888          * Needs a new association to take effect.
 889          */
 890         unsigned int uapsd_max_sp_len;
 891
 892         bool pspolling;
 893         bool offchannel_ps_enabled;
 894         /*
 895          * PS can only be enabled when we have exactly one managed
 896          * interface (and monitors) in PS, this then points there.
 897          */
 898         struct ieee80211_sub_if_data *ps_sdata;
 899         struct work_struct dynamic_ps_enable_work;
 900         struct work_struct dynamic_ps_disable_work;
 901         struct timer_list dynamic_ps_timer;
 902         struct notifier_block network_latency_notifier;
 903         struct notifier_block ifa_notifier;
 904
 905         /*
 906          * The dynamic ps timeout configured from user space via WEXT -
 907          * this will override whatever chosen by mac80211 internally.
 908          */
 909         int dynamic_ps_forced_timeout;
 910         int dynamic_ps_user_timeout;
 911         bool disable_dynamic_ps;
 912
 913         int user_power_level; /* in dBm */
 914         int power_constr_level; /* in dBm */
 915
 916         enum ieee80211_smps_mode smps_mode;
 917
 918         struct work_struct restart_work;
 919
 920 #ifdef CONFIG_MAC80211_DEBUGFS
 921         struct local_debugfsdentries {
 922                 struct dentry *rcdir;
 923                 struct dentry *keys;
 924         } debugfs;
 925 #endif
 926
 927         /* dummy netdev for use w/ NAPI */
 928         struct net_device napi_dev;
 929
 930         struct napi_struct napi;
 931 };
 932
 933 static inline struct ieee80211_sub_if_data *
 934 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 935 {
 936         return netdev_priv(dev);
 937 }
 938
 939 /* this struct represents 802.11n's RA/TID combination */
 940 struct ieee80211_ra_tid {
 941         u8 ra[ETH_ALEN];
 942         u16 tid;
 943 };
 944
 945 /* Parsed Information Elements */
 946 struct ieee802_11_elems {
 947         u8 *ie_start;
 948         size_t total_len;
 949
 950         /* pointers to IEs */
 951         u8 *ssid;
 952         u8 *supp_rates;
 953         u8 *fh_params;
 954         u8 *ds_params;
 955         u8 *cf_params;
 956         struct ieee80211_tim_ie *tim;
 957         u8 *ibss_params;
 958         u8 *challenge;
 959         u8 *wpa;
 960         u8 *rsn;
 961         u8 *erp_info;
 962         u8 *ext_supp_rates;
 963         u8 *wmm_info;
 964         u8 *wmm_param;
 965         struct ieee80211_ht_cap *ht_cap_elem;
 966         struct ieee80211_ht_info *ht_info_elem;
 967         struct ieee80211_meshconf_ie *mesh_config;
 968         u8 *mesh_id;
 969         u8 *peer_link;
 970         u8 *preq;
 971         u8 *prep;
 972         u8 *perr;
 973         struct ieee80211_rann_ie *rann;
 974         u8 *ch_switch_elem;
 975         u8 *country_elem;
 976         u8 *pwr_constr_elem;
 977         u8 *quiet_elem;         /* first quite element */
 978         u8 *timeout_int;
 979
 980         /* length of them, respectively */
 981         u8 ssid_len;
 982         u8 supp_rates_len;
 983         u8 fh_params_len;
 984         u8 ds_params_len;
 985         u8 cf_params_len;
 986         u8 tim_len;
 987         u8 ibss_params_len;
 988         u8 challenge_len;
 989         u8 wpa_len;
 990         u8 rsn_len;
 991         u8 erp_info_len;
 992         u8 ext_supp_rates_len;
 993         u8 wmm_info_len;
 994         u8 wmm_param_len;
 995         u8 mesh_id_len;
 996         u8 peer_link_len;
 997         u8 preq_len;
 998         u8 prep_len;
 999         u8 perr_len;
1000         u8 ch_switch_elem_len;
1001         u8 country_elem_len;
1002         u8 pwr_constr_elem_len;
1003         u8 quiet_elem_len;
1004         u8 num_of_quiet_elem;   /* can be more the one */
1005         u8 timeout_int_len;
1006 };
1007
1008 static inline struct ieee80211_local *hw_to_local(
1009         struct ieee80211_hw *hw)
1010 {
1011         return container_of(hw, struct ieee80211_local, hw);
1012 }
1013
1014 static inline struct ieee80211_hw *local_to_hw(
1015         struct ieee80211_local *local)
1016 {
1017         return &local->hw;
1018 }
1019
1020
1021 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1022 {
1023         return compare_ether_addr(raddr, addr) == 0 ||
1024                is_broadcast_ether_addr(raddr);
1025 }
1026
1027
1028 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1029 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1030 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1031                                       u32 changed);
1032 void ieee80211_configure_filter(struct ieee80211_local *local);
1033 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1034
1035 extern bool ieee80211_disable_40mhz_24ghz;
1036
1037 /* STA code */
1038 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1039 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1040                        struct cfg80211_auth_request *req);
1041 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1042                         struct cfg80211_assoc_request *req);
1043 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1044                          struct cfg80211_deauth_request *req,
1045                          void *cookie);
1046 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1047                            struct cfg80211_disassoc_request *req,
1048                            void *cookie);
1049 void ieee80211_send_pspoll(struct ieee80211_local *local,
1050                            struct ieee80211_sub_if_data *sdata);
1051 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1052 int ieee80211_max_network_latency(struct notifier_block *nb,
1053                                   unsigned long data, void *dummy);
1054 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1055 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1056                                       struct ieee80211_channel_sw_ie *sw_elem,
1057                                       struct ieee80211_bss *bss,
1058                                       u64 timestamp);
1059 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1060 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1061 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1062 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1063                                   struct sk_buff *skb);
1064 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1065 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1066
1067 /* IBSS code */
1068 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1069 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1070 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1071                                         u8 *bssid, u8 *addr, u32 supp_rates,
1072                                         gfp_t gfp);
1073 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1074                         struct cfg80211_ibss_params *params);
1075 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1076 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1077 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1078 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1079 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1080                                    struct sk_buff *skb);
1081
1082 /* mesh code */
1083 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1084 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1085                                    struct sk_buff *skb);
1086
1087 /* scan/BSS handling */
1088 void ieee80211_scan_work(struct work_struct *work);
1089 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1090                                     const u8 *ssid, u8 ssid_len,
1091                                     struct ieee80211_channel *chan);
1092 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1093                            struct cfg80211_scan_request *req);
1094 void ieee80211_scan_cancel(struct ieee80211_local *local);
1095 ieee80211_rx_result
1096 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1097
1098 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1099 struct ieee80211_bss *
1100 ieee80211_bss_info_update(struct ieee80211_local *local,
1101                           struct ieee80211_rx_status *rx_status,
1102                           struct ieee80211_mgmt *mgmt,
1103                           size_t len,
1104                           struct ieee802_11_elems *elems,
1105                           struct ieee80211_channel *channel,
1106                           bool beacon);
1107 struct ieee80211_bss *
1108 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1109                      u8 *ssid, u8 ssid_len);
1110 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1111                           struct ieee80211_bss *bss);
1112
1113 /* off-channel helpers */
1114 void ieee80211_offchannel_stop_beaconing(struct ieee80211_local *local);
1115 void ieee80211_offchannel_stop_station(struct ieee80211_local *local);
1116 void ieee80211_offchannel_return(struct ieee80211_local *local,
1117                                  bool enable_beaconing);
1118
1119 /* interface handling */
1120 int ieee80211_iface_init(void);
1121 void ieee80211_iface_exit(void);
1122 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1123                      struct net_device **new_dev, enum nl80211_iftype type,
1124                      struct vif_params *params);
1125 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1126                              enum nl80211_iftype type);
1127 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1128 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1129 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1130 void ieee80211_recalc_idle(struct ieee80211_local *local);
1131 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1132                                     const int offset);
1133
1134 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1135 {
1136         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1137 }
1138
1139 /* tx handling */
1140 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1141 void ieee80211_tx_pending(unsigned long data);
1142 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1143                                          struct net_device *dev);
1144 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1145                                        struct net_device *dev);
1146
1147 /*
1148  * radiotap header for status frames
1149  */
1150 struct ieee80211_tx_status_rtap_hdr {
1151         struct ieee80211_radiotap_header hdr;
1152         u8 rate;
1153         u8 padding_for_rate;
1154         __le16 tx_flags;
1155         u8 data_retries;
1156 } __packed;
1157
1158
1159 /* HT */
1160 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1161                                        struct ieee80211_ht_cap *ht_cap_ie,
1162                                        struct ieee80211_sta_ht_cap *ht_cap);
1163 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1164 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1165                           const u8 *da, u16 tid,
1166                           u16 initiator, u16 reason_code);
1167 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1168                                enum ieee80211_smps_mode smps, const u8 *da,
1169                                const u8 *bssid);
1170 void ieee80211_request_smps_work(struct work_struct *work);
1171
1172 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1173                                      u16 initiator, u16 reason, bool stop);
1174 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1175                                     u16 initiator, u16 reason, bool stop);
1176 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1177 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1178                              struct sta_info *sta,
1179                              struct ieee80211_mgmt *mgmt, size_t len);
1180 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1181                                   struct sta_info *sta,
1182                                   struct ieee80211_mgmt *mgmt,
1183                                   size_t len);
1184 void ieee80211_process_addba_request(struct ieee80211_local *local,
1185                                      struct sta_info *sta,
1186                                      struct ieee80211_mgmt *mgmt,
1187                                      size_t len);
1188
1189 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1190                                    enum ieee80211_back_parties initiator,
1191                                    bool tx);
1192 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1193                                     enum ieee80211_back_parties initiator,
1194                                     bool tx);
1195 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1196 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1197 void ieee80211_ba_session_work(struct work_struct *work);
1198 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1199 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1200
1201 /* Spectrum management */
1202 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1203                                        struct ieee80211_mgmt *mgmt,
1204                                        size_t len);
1205
1206 /* Suspend/resume and hw reconfiguration */
1207 int ieee80211_reconfig(struct ieee80211_local *local);
1208 void ieee80211_stop_device(struct ieee80211_local *local);
1209
1210 #ifdef CONFIG_PM
1211 int __ieee80211_suspend(struct ieee80211_hw *hw);
1212
1213 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1214 {
1215         struct ieee80211_local *local = hw_to_local(hw);
1216
1217         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1218                 "%s: resume with hardware scan still in progress\n",
1219                 wiphy_name(hw->wiphy));
1220
1221         return ieee80211_reconfig(hw_to_local(hw));
1222 }
1223 #else
1224 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1225 {
1226         return 0;
1227 }
1228
1229 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1230 {
1231         return 0;
1232 }
1233 #endif
1234
1235 /* utility functions/constants */
1236 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1237 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1238                         enum nl80211_iftype type);
1239 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1240                              int rate, int erp, int short_preamble);
1241 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1242                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1243                                      gfp_t gfp);
1244 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1245 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1246 void ieee802_11_parse_elems(u8 *start, size_t len,
1247                             struct ieee802_11_elems *elems);
1248 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1249                                struct ieee802_11_elems *elems,
1250                                u64 filter, u32 crc);
1251 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1252                               enum ieee80211_band band);
1253
1254 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1255 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1256 void ieee80211_dynamic_ps_timer(unsigned long data);
1257 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1258                              struct ieee80211_sub_if_data *sdata,
1259                              int powersave);
1260 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1261                              struct ieee80211_hdr *hdr);
1262 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1263                              struct ieee80211_hdr *hdr, bool ack);
1264 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1265
1266 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1267                                      enum queue_stop_reason reason);
1268 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1269                                      enum queue_stop_reason reason);
1270 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1271                                     enum queue_stop_reason reason);
1272 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1273                                     enum queue_stop_reason reason);
1274 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1275                                struct sk_buff *skb);
1276 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1277                                struct sk_buff_head *skbs);
1278 int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1279                                   struct sk_buff_head *skbs,
1280                                   void (*fn)(void *data), void *data);
1281
1282 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1283                          u16 transaction, u16 auth_alg,
1284                          u8 *extra, size_t extra_len, const u8 *bssid,
1285                          const u8 *key, u8 key_len, u8 key_idx);
1286 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1287                              const u8 *ie, size_t ie_len,
1288                              enum ieee80211_band band, u32 rate_mask,
1289                              u8 channel);
1290 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1291                                           u8 *dst,
1292                                           const u8 *ssid, size_t ssid_len,
1293                                           const u8 *ie, size_t ie_len);
1294 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1295                               const u8 *ssid, size_t ssid_len,
1296                               const u8 *ie, size_t ie_len);
1297
1298 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1299                                   const size_t supp_rates_len,
1300                                   const u8 *supp_rates);
1301 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1302                             struct ieee802_11_elems *elems,
1303                             enum ieee80211_band band);
1304 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1305                              enum ieee80211_smps_mode smps_mode);
1306 void ieee80211_recalc_smps(struct ieee80211_local *local);
1307
1308 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1309                           const u8 *ids, int n_ids, size_t offset);
1310 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1311
1312 /* internal work items */
1313 void ieee80211_work_init(struct ieee80211_local *local);
1314 void ieee80211_add_work(struct ieee80211_work *wk);
1315 void free_work(struct ieee80211_work *wk);
1316 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1317 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1318                                            struct sk_buff *skb);
1319 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1320                                    struct ieee80211_channel *chan,
1321                                    enum nl80211_channel_type channel_type,
1322                                    unsigned int duration, u64 *cookie);
1323 int ieee80211_wk_cancel_remain_on_channel(
1324         struct ieee80211_sub_if_data *sdata, u64 cookie);
1325
1326 /* channel management */
1327 enum ieee80211_chan_mode {
1328         CHAN_MODE_UNDEFINED,
1329         CHAN_MODE_HOPPING,
1330         CHAN_MODE_FIXED,
1331 };
1332
1333 enum ieee80211_chan_mode
1334 ieee80211_get_channel_mode(struct ieee80211_local *local,
1335                            struct ieee80211_sub_if_data *ignore);
1336 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1337                                 struct ieee80211_sub_if_data *sdata,
1338                                 enum nl80211_channel_type chantype);
1339
1340 #ifdef CONFIG_MAC80211_NOINLINE
1341 #define debug_noinline noinline
1342 #else
1343 #define debug_noinline
1344 #endif
1345
1346 #endif /* IEEE80211_I_H */