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 };
 264
 265 /**
 266  * enum work_done_result - indicates what to do after work was done
 267  *
 268  * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
 269  * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
 270  *      should be requeued.
 271  */
 272 enum work_done_result {
 273         WORK_DONE_DESTROY,
 274         WORK_DONE_REQUEUE,
 275 };
 276
 277 struct ieee80211_work {
 278         struct list_head list;
 279
 280         struct rcu_head rcu_head;
 281
 282         struct ieee80211_sub_if_data *sdata;
 283
 284         enum work_done_result (*done)(struct ieee80211_work *wk,
 285                                       struct sk_buff *skb);
 286
 287         struct ieee80211_channel *chan;
 288         enum nl80211_channel_type chan_type;
 289
 290         unsigned long timeout;
 291         enum ieee80211_work_type type;
 292
 293         u8 filter_ta[ETH_ALEN];
 294
 295         bool started;
 296
 297         union {
 298                 struct {
 299                         int tries;
 300                         u16 algorithm, transaction;
 301                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 302                         u8 ssid_len;
 303                         u8 key[WLAN_KEY_LEN_WEP104];
 304                         u8 key_len, key_idx;
 305                         bool privacy;
 306                 } probe_auth;
 307                 struct {
 308                         struct cfg80211_bss *bss;
 309                         const u8 *supp_rates;
 310                         const u8 *ht_information_ie;
 311                         enum ieee80211_smps_mode smps;
 312                         int tries;
 313                         u16 capability;
 314                         u8 prev_bssid[ETH_ALEN];
 315                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 316                         u8 ssid_len;
 317                         u8 supp_rates_len;
 318                         bool wmm_used, use_11n, uapsd_used;
 319                 } assoc;
 320                 struct {
 321                         u32 duration;
 322                 } remain;
 323         };
 324
 325         int ie_len;
 326         /* must be last */
 327         u8 ie[0];
 328 };
 329
 330 /* flags used in struct ieee80211_if_managed.flags */
 331 enum ieee80211_sta_flags {
 332         IEEE80211_STA_BEACON_POLL       = BIT(0),
 333         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 334         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 335         IEEE80211_STA_DISABLE_11N       = BIT(4),
 336         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 337         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 338         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 339         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 340         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 341 };
 342
 343 struct ieee80211_if_managed {
 344         struct timer_list timer;
 345         struct timer_list conn_mon_timer;
 346         struct timer_list bcn_mon_timer;
 347         struct timer_list chswitch_timer;
 348         struct work_struct monitor_work;
 349         struct work_struct chswitch_work;
 350         struct work_struct beacon_connection_loss_work;
 351
 352         unsigned long probe_timeout;
 353         int probe_send_count;
 354
 355         struct mutex mtx;
 356         struct cfg80211_bss *associated;
 357
 358         u8 bssid[ETH_ALEN];
 359
 360         u16 aid;
 361
 362         unsigned long timers_running; /* used for quiesce/restart */
 363         bool powersave; /* powersave requested for this iface */
 364         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 365                                  ap_smps, /* smps mode AP thinks we're in */
 366                                  driver_smps_mode; /* smps mode request */
 367
 368         struct work_struct request_smps_work;
 369
 370         unsigned int flags;
 371
 372         bool beacon_crc_valid;
 373         u32 beacon_crc;
 374
 375         enum {
 376                 IEEE80211_MFP_DISABLED,
 377                 IEEE80211_MFP_OPTIONAL,
 378                 IEEE80211_MFP_REQUIRED
 379         } mfp; /* management frame protection */
 380
 381         int wmm_last_param_set;
 382
 383         u8 use_4addr;
 384
 385         /* Signal strength from the last Beacon frame in the current BSS. */
 386         int last_beacon_signal;
 387
 388         /*
 389          * Weighted average of the signal strength from Beacon frames in the
 390          * current BSS. This is in units of 1/16 of the signal unit to maintain
 391          * accuracy and to speed up calculations, i.e., the value need to be
 392          * divided by 16 to get the actual value.
 393          */
 394         int ave_beacon_signal;
 395
 396         /*
 397          * Number of Beacon frames used in ave_beacon_signal. This can be used
 398          * to avoid generating less reliable cqm events that would be based
 399          * only on couple of received frames.
 400          */
 401         unsigned int count_beacon_signal;
 402
 403         /*
 404          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 405          * that triggered a cqm event. 0 indicates that no event has been
 406          * generated for the current association.
 407          */
 408         int last_cqm_event_signal;
 409 };
 410
 411 struct ieee80211_if_ibss {
 412         struct timer_list timer;
 413
 414         struct mutex mtx;
 415
 416         unsigned long last_scan_completed;
 417
 418         u32 basic_rates;
 419
 420         bool timer_running;
 421
 422         bool fixed_bssid;
 423         bool fixed_channel;
 424         bool privacy;
 425
 426         u8 bssid[ETH_ALEN];
 427         u8 ssid[IEEE80211_MAX_SSID_LEN];
 428         u8 ssid_len, ie_len;
 429         u8 *ie;
 430         struct ieee80211_channel *channel;
 431
 432         unsigned long ibss_join_req;
 433         /* probe response/beacon for IBSS */
 434         struct sk_buff *presp, *skb;
 435
 436         enum {
 437                 IEEE80211_IBSS_MLME_SEARCH,
 438                 IEEE80211_IBSS_MLME_JOINED,
 439         } state;
 440 };
 441
 442 struct ieee80211_if_mesh {
 443         struct timer_list housekeeping_timer;
 444         struct timer_list mesh_path_timer;
 445         struct timer_list mesh_path_root_timer;
 446
 447         unsigned long timers_running;
 448
 449         unsigned long wrkq_flags;
 450
 451         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 452         size_t mesh_id_len;
 453         /* Active Path Selection Protocol Identifier */
 454         u8 mesh_pp_id;
 455         /* Active Path Selection Metric Identifier */
 456         u8 mesh_pm_id;
 457         /* Congestion Control Mode Identifier */
 458         u8 mesh_cc_id;
 459         /* Synchronization Protocol Identifier */
 460         u8 mesh_sp_id;
 461         /* Authentication Protocol Identifier */
 462         u8 mesh_auth_id;
 463         /* Local mesh Sequence Number */
 464         u32 sn;
 465         /* Last used PREQ ID */
 466         u32 preq_id;
 467         atomic_t mpaths;
 468         /* Timestamp of last SN update */
 469         unsigned long last_sn_update;
 470         /* Timestamp of last SN sent */
 471         unsigned long last_preq;
 472         struct mesh_rmc *rmc;
 473         spinlock_t mesh_preq_queue_lock;
 474         struct mesh_preq_queue preq_queue;
 475         int preq_queue_len;
 476         struct mesh_stats mshstats;
 477         struct mesh_config mshcfg;
 478         u32 mesh_seqnum;
 479         bool accepting_plinks;
 480 };
 481
 482 #ifdef CONFIG_MAC80211_MESH
 483 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 484         do { (msh)->mshstats.name++; } while (0)
 485 #else
 486 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 487         do { } while (0)
 488 #endif
 489
 490 /**
 491  * enum ieee80211_sub_if_data_flags - virtual interface flags
 492  *
 493  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 494  * @IEEE80211_SDATA_PROMISC: interface is promisc
 495  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 496  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 497  *      associated stations and deliver multicast frames both
 498  *      back to wireless media and to the local net stack.
 499  */
 500 enum ieee80211_sub_if_data_flags {
 501         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 502         IEEE80211_SDATA_PROMISC                 = BIT(1),
 503         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 504         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 505 };
 506
 507 /**
 508  * enum ieee80211_sdata_state_bits - virtual interface state bits
 509  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 510  *      mirrors netif_running() but is separate for interface type
 511  *      change handling while the interface is up
 512  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 513  *      mode, so queues are stopped
 514  */
 515 enum ieee80211_sdata_state_bits {
 516         SDATA_STATE_RUNNING,
 517         SDATA_STATE_OFFCHANNEL,
 518 };
 519
 520 struct ieee80211_sub_if_data {
 521         struct list_head list;
 522
 523         struct wireless_dev wdev;
 524
 525         /* keys */
 526         struct list_head key_list;
 527
 528         struct net_device *dev;
 529         struct ieee80211_local *local;
 530
 531         unsigned int flags;
 532
 533         unsigned long state;
 534
 535         int drop_unencrypted;
 536
 537         char name[IFNAMSIZ];
 538
 539         /*
 540          * keep track of whether the HT opmode (stored in
 541          * vif.bss_info.ht_operation_mode) is valid.
 542          */
 543         bool ht_opmode_valid;
 544
 545         /* to detect idle changes */
 546         bool old_idle;
 547
 548         /* Fragment table for host-based reassembly */
 549         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 550         unsigned int fragment_next;
 551
 552         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 553         struct ieee80211_key *default_key;
 554         struct ieee80211_key *default_mgmt_key;
 555
 556         u16 sequence_number;
 557         __be16 control_port_protocol;
 558         bool control_port_no_encrypt;
 559
 560         struct work_struct work;
 561         struct sk_buff_head skb_queue;
 562
 563         bool arp_filter_state;
 564
 565         /*
 566          * AP this belongs to: self in AP mode and
 567          * corresponding AP in VLAN mode, NULL for
 568          * all others (might be needed later in IBSS)
 569          */
 570         struct ieee80211_if_ap *bss;
 571
 572         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 573         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 574
 575         union {
 576                 struct ieee80211_if_ap ap;
 577                 struct ieee80211_if_wds wds;
 578                 struct ieee80211_if_vlan vlan;
 579                 struct ieee80211_if_managed mgd;
 580                 struct ieee80211_if_ibss ibss;
 581 #ifdef CONFIG_MAC80211_MESH
 582                 struct ieee80211_if_mesh mesh;
 583 #endif
 584                 u32 mntr_flags;
 585         } u;
 586
 587 #ifdef CONFIG_MAC80211_DEBUGFS
 588         struct {
 589                 struct dentry *dir;
 590                 struct dentry *subdir_stations;
 591                 struct dentry *default_key;
 592                 struct dentry *default_mgmt_key;
 593         } debugfs;
 594 #endif
 595         /* must be last, dynamically sized area in this! */
 596         struct ieee80211_vif vif;
 597 };
 598
 599 static inline
 600 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 601 {
 602         return container_of(p, struct ieee80211_sub_if_data, vif);
 603 }
 604
 605 static inline void
 606 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 607                             u8 mesh_id_len, u8 *mesh_id)
 608 {
 609 #ifdef CONFIG_MAC80211_MESH
 610         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 611         ifmsh->mesh_id_len = mesh_id_len;
 612         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 613 #else
 614         WARN_ON(1);
 615 #endif
 616 }
 617
 618 enum sdata_queue_type {
 619         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 620         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 621         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 622 };
 623
 624 enum {
 625         IEEE80211_RX_MSG        = 1,
 626         IEEE80211_TX_STATUS_MSG = 2,
 627 };
 628
 629 enum queue_stop_reason {
 630         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 631         IEEE80211_QUEUE_STOP_REASON_PS,
 632         IEEE80211_QUEUE_STOP_REASON_CSA,
 633         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 634         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 635         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 636 };
 637
 638 /**
 639  * mac80211 scan flags - currently active scan mode
 640  *
 641  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 642  *      well be on the operating channel
 643  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 644  *      determine if we are on the operating channel or not
 645  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 646  *      gets only set in conjunction with SCAN_SW_SCANNING
 647  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 648  *      that the scan completed.
 649  * @SCAN_ABORTED: Set for our scan work function when the driver reported
 650  *      a scan complete for an aborted scan.
 651  */
 652 enum {
 653         SCAN_SW_SCANNING,
 654         SCAN_HW_SCANNING,
 655         SCAN_OFF_CHANNEL,
 656         SCAN_COMPLETED,
 657         SCAN_ABORTED,
 658 };
 659
 660 /**
 661  * enum mac80211_scan_state - scan state machine states
 662  *
 663  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 664  *      determines if we should keep on scanning or switch back to the
 665  *      operating channel
 666  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 667  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 668  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 669  *      about us leaving the channel and stop all associated STA interfaces
 670  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 671  *      AP about us being back and restart all associated STA interfaces
 672  */
 673 enum mac80211_scan_state {
 674         SCAN_DECISION,
 675         SCAN_SET_CHANNEL,
 676         SCAN_SEND_PROBE,
 677         SCAN_LEAVE_OPER_CHANNEL,
 678         SCAN_ENTER_OPER_CHANNEL,
 679 };
 680
 681 struct ieee80211_local {
 682         /* embed the driver visible part.
 683          * don't cast (use the static inlines below), but we keep
 684          * it first anyway so they become a no-op */
 685         struct ieee80211_hw hw;
 686
 687         const struct ieee80211_ops *ops;
 688
 689         /*
 690          * work stuff, potentially off-channel (in the future)
 691          */
 692         struct list_head work_list;
 693         struct timer_list work_timer;
 694         struct work_struct work_work;
 695         struct sk_buff_head work_skb_queue;
 696
 697         /*
 698          * private workqueue to mac80211. mac80211 makes this accessible
 699          * via ieee80211_queue_work()
 700          */
 701         struct workqueue_struct *workqueue;
 702
 703         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 704         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 705         spinlock_t queue_stop_reason_lock;
 706
 707         int open_count;
 708         int monitors, cooked_mntrs;
 709         /* number of interfaces with corresponding FIF_ flags */
 710         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 711             fif_probe_req;
 712         int probe_req_reg;
 713         unsigned int filter_flags; /* FIF_* */
 714
 715         bool wiphy_ciphers_allocated;
 716
 717         /* protects the aggregated multicast list and filter calls */
 718         spinlock_t filter_lock;
 719
 720         /* used for uploading changed mc list */
 721         struct work_struct reconfig_filter;
 722
 723         /* used to reconfigure hardware SM PS */
 724         struct work_struct recalc_smps;
 725
 726         /* aggregated multicast list */
 727         struct netdev_hw_addr_list mc_list;
 728
 729         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 730
 731         /*
 732          * suspended is true if we finished all the suspend _and_ we have
 733          * not yet come up from resume. This is to be used by mac80211
 734          * to ensure driver sanity during suspend and mac80211's own
 735          * sanity. It can eventually be used for WoW as well.
 736          */
 737         bool suspended;
 738
 739         /*
 740          * Resuming is true while suspended, but when we're reprogramming the
 741          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 742          * again even though some other parts of the stack are still suspended
 743          * and we still drop received frames to avoid waking the stack.
 744          */
 745         bool resuming;
 746
 747         /*
 748          * quiescing is true during the suspend process _only_ to
 749          * ease timer cancelling etc.
 750          */
 751         bool quiescing;
 752
 753         /* device is started */
 754         bool started;
 755
 756         int tx_headroom; /* required headroom for hardware/radiotap */
 757
 758         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 759          * added to skb_queue will be processed, but frames in
 760          * skb_queue_unreliable may be dropped if the total length of these
 761          * queues increases over the limit. */
 762 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 763         struct tasklet_struct tasklet;
 764         struct sk_buff_head skb_queue;
 765         struct sk_buff_head skb_queue_unreliable;
 766
 767         /* Station data */
 768         /*
 769          * The mutex only protects the list and counter,
 770          * reads are done in RCU.
 771          * Additionally, the lock protects the hash table,
 772          * the pending list and each BSS's TIM bitmap.
 773          */
 774         struct mutex sta_mtx;
 775         spinlock_t sta_lock;
 776         unsigned long num_sta;
 777         struct list_head sta_list, sta_pending_list;
 778         struct sta_info *sta_hash[STA_HASH_SIZE];
 779         struct timer_list sta_cleanup;
 780         struct work_struct sta_finish_work;
 781         int sta_generation;
 782
 783         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 784         struct tasklet_struct tx_pending_tasklet;
 785
 786         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 787
 788         /* number of interfaces with corresponding IFF_ flags */
 789         atomic_t iff_allmultis, iff_promiscs;
 790
 791         struct rate_control_ref *rate_ctrl;
 792
 793         struct crypto_blkcipher *wep_tx_tfm;
 794         struct crypto_blkcipher *wep_rx_tfm;
 795         u32 wep_iv;
 796
 797         /* see iface.c */
 798         struct list_head interfaces;
 799         struct mutex iflist_mtx;
 800
 801         /*
 802          * Key mutex, protects sdata's key_list and sta_info's
 803          * key pointers (write access, they're RCU.)
 804          */
 805         struct mutex key_mtx;
 806
 807         /* mutex for scan and work locking */
 808         struct mutex mtx;
 809
 810         /* Scanning and BSS list */
 811         unsigned long scanning;
 812         struct cfg80211_ssid scan_ssid;
 813         struct cfg80211_scan_request *int_scan_req;
 814         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 815         struct ieee80211_channel *scan_channel;
 816         enum ieee80211_band hw_scan_band;
 817         int scan_channel_idx;
 818         int scan_ies_len;
 819
 820         unsigned long leave_oper_channel_time;
 821         enum mac80211_scan_state next_scan_state;
 822         struct delayed_work scan_work;
 823         struct ieee80211_sub_if_data *scan_sdata;
 824         enum nl80211_channel_type _oper_channel_type;
 825         struct ieee80211_channel *oper_channel, *csa_channel;
 826
 827         /* Temporary remain-on-channel for off-channel operations */
 828         struct ieee80211_channel *tmp_channel;
 829         enum nl80211_channel_type tmp_channel_type;
 830
 831         /* SNMP counters */
 832         /* dot11CountersTable */
 833         u32 dot11TransmittedFragmentCount;
 834         u32 dot11MulticastTransmittedFrameCount;
 835         u32 dot11FailedCount;
 836         u32 dot11RetryCount;
 837         u32 dot11MultipleRetryCount;
 838         u32 dot11FrameDuplicateCount;
 839         u32 dot11ReceivedFragmentCount;
 840         u32 dot11MulticastReceivedFrameCount;
 841         u32 dot11TransmittedFrameCount;
 842
 843 #ifdef CONFIG_MAC80211_LEDS
 844         int tx_led_counter, rx_led_counter;
 845         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 846         char tx_led_name[32], rx_led_name[32],
 847              assoc_led_name[32], radio_led_name[32];
 848 #endif
 849
 850 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 851         /* TX/RX handler statistics */
 852         unsigned int tx_handlers_drop;
 853         unsigned int tx_handlers_queued;
 854         unsigned int tx_handlers_drop_unencrypted;
 855         unsigned int tx_handlers_drop_fragment;
 856         unsigned int tx_handlers_drop_wep;
 857         unsigned int tx_handlers_drop_not_assoc;
 858         unsigned int tx_handlers_drop_unauth_port;
 859         unsigned int rx_handlers_drop;
 860         unsigned int rx_handlers_queued;
 861         unsigned int rx_handlers_drop_nullfunc;
 862         unsigned int rx_handlers_drop_defrag;
 863         unsigned int rx_handlers_drop_short;
 864         unsigned int rx_handlers_drop_passive_scan;
 865         unsigned int tx_expand_skb_head;
 866         unsigned int tx_expand_skb_head_cloned;
 867         unsigned int rx_expand_skb_head;
 868         unsigned int rx_expand_skb_head2;
 869         unsigned int rx_handlers_fragments;
 870         unsigned int tx_status_drop;
 871 #define I802_DEBUG_INC(c) (c)++
 872 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 873 #define I802_DEBUG_INC(c) do { } while (0)
 874 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 875
 876
 877         int total_ps_buffered; /* total number of all buffered unicast and
 878                                 * multicast packets for power saving stations
 879                                 */
 880         int wifi_wme_noack_test;
 881         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 882
 883         /*
 884          * Bitmask of enabled u-apsd queues,
 885          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 886          * to take effect.
 887          */
 888         unsigned int uapsd_queues;
 889
 890         /*
 891          * Maximum number of buffered frames AP can deliver during a
 892          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 893          * Needs a new association to take effect.
 894          */
 895         unsigned int uapsd_max_sp_len;
 896
 897         bool pspolling;
 898         bool offchannel_ps_enabled;
 899         /*
 900          * PS can only be enabled when we have exactly one managed
 901          * interface (and monitors) in PS, this then points there.
 902          */
 903         struct ieee80211_sub_if_data *ps_sdata;
 904         struct work_struct dynamic_ps_enable_work;
 905         struct work_struct dynamic_ps_disable_work;
 906         struct timer_list dynamic_ps_timer;
 907         struct notifier_block network_latency_notifier;
 908         struct notifier_block ifa_notifier;
 909
 910         /*
 911          * The dynamic ps timeout configured from user space via WEXT -
 912          * this will override whatever chosen by mac80211 internally.
 913          */
 914         int dynamic_ps_forced_timeout;
 915         int dynamic_ps_user_timeout;
 916         bool disable_dynamic_ps;
 917
 918         int user_power_level; /* in dBm */
 919         int power_constr_level; /* in dBm */
 920
 921         enum ieee80211_smps_mode smps_mode;
 922
 923         struct work_struct restart_work;
 924
 925 #ifdef CONFIG_MAC80211_DEBUGFS
 926         struct local_debugfsdentries {
 927                 struct dentry *rcdir;
 928                 struct dentry *keys;
 929         } debugfs;
 930 #endif
 931
 932         /* dummy netdev for use w/ NAPI */
 933         struct net_device napi_dev;
 934
 935         struct napi_struct napi;
 936 };
 937
 938 static inline struct ieee80211_sub_if_data *
 939 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 940 {
 941         return netdev_priv(dev);
 942 }
 943
 944 /* this struct represents 802.11n's RA/TID combination */
 945 struct ieee80211_ra_tid {
 946         u8 ra[ETH_ALEN];
 947         u16 tid;
 948 };
 949
 950 /* Parsed Information Elements */
 951 struct ieee802_11_elems {
 952         u8 *ie_start;
 953         size_t total_len;
 954
 955         /* pointers to IEs */
 956         u8 *ssid;
 957         u8 *supp_rates;
 958         u8 *fh_params;
 959         u8 *ds_params;
 960         u8 *cf_params;
 961         struct ieee80211_tim_ie *tim;
 962         u8 *ibss_params;
 963         u8 *challenge;
 964         u8 *wpa;
 965         u8 *rsn;
 966         u8 *erp_info;
 967         u8 *ext_supp_rates;
 968         u8 *wmm_info;
 969         u8 *wmm_param;
 970         struct ieee80211_ht_cap *ht_cap_elem;
 971         struct ieee80211_ht_info *ht_info_elem;
 972         struct ieee80211_meshconf_ie *mesh_config;
 973         u8 *mesh_id;
 974         u8 *peer_link;
 975         u8 *preq;
 976         u8 *prep;
 977         u8 *perr;
 978         struct ieee80211_rann_ie *rann;
 979         u8 *ch_switch_elem;
 980         u8 *country_elem;
 981         u8 *pwr_constr_elem;
 982         u8 *quiet_elem;         /* first quite element */
 983         u8 *timeout_int;
 984
 985         /* length of them, respectively */
 986         u8 ssid_len;
 987         u8 supp_rates_len;
 988         u8 fh_params_len;
 989         u8 ds_params_len;
 990         u8 cf_params_len;
 991         u8 tim_len;
 992         u8 ibss_params_len;
 993         u8 challenge_len;
 994         u8 wpa_len;
 995         u8 rsn_len;
 996         u8 erp_info_len;
 997         u8 ext_supp_rates_len;
 998         u8 wmm_info_len;
 999         u8 wmm_param_len;
1000         u8 mesh_id_len;
1001         u8 peer_link_len;
1002         u8 preq_len;
1003         u8 prep_len;
1004         u8 perr_len;
1005         u8 ch_switch_elem_len;
1006         u8 country_elem_len;
1007         u8 pwr_constr_elem_len;
1008         u8 quiet_elem_len;
1009         u8 num_of_quiet_elem;   /* can be more the one */
1010         u8 timeout_int_len;
1011 };
1012
1013 static inline struct ieee80211_local *hw_to_local(
1014         struct ieee80211_hw *hw)
1015 {
1016         return container_of(hw, struct ieee80211_local, hw);
1017 }
1018
1019 static inline struct ieee80211_hw *local_to_hw(
1020         struct ieee80211_local *local)
1021 {
1022         return &local->hw;
1023 }
1024
1025
1026 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1027 {
1028         return compare_ether_addr(raddr, addr) == 0 ||
1029                is_broadcast_ether_addr(raddr);
1030 }
1031
1032
1033 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1034 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1035 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1036                                       u32 changed);
1037 void ieee80211_configure_filter(struct ieee80211_local *local);
1038 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1039
1040 extern bool ieee80211_disable_40mhz_24ghz;
1041
1042 /* STA code */
1043 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1044 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1045                        struct cfg80211_auth_request *req);
1046 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1047                         struct cfg80211_assoc_request *req);
1048 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1049                          struct cfg80211_deauth_request *req,
1050                          void *cookie);
1051 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1052                            struct cfg80211_disassoc_request *req,
1053                            void *cookie);
1054 void ieee80211_send_pspoll(struct ieee80211_local *local,
1055                            struct ieee80211_sub_if_data *sdata);
1056 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1057 int ieee80211_max_network_latency(struct notifier_block *nb,
1058                                   unsigned long data, void *dummy);
1059 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1060 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1061                                       struct ieee80211_channel_sw_ie *sw_elem,
1062                                       struct ieee80211_bss *bss,
1063                                       u64 timestamp);
1064 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1065 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1066 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1067 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1068                                   struct sk_buff *skb);
1069 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1070 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1071
1072 /* IBSS code */
1073 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1074 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1075 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1076                                         u8 *bssid, u8 *addr, u32 supp_rates,
1077                                         gfp_t gfp);
1078 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1079                         struct cfg80211_ibss_params *params);
1080 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1081 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1082 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1083 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1084 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1085                                    struct sk_buff *skb);
1086
1087 /* mesh code */
1088 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1089 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1090                                    struct sk_buff *skb);
1091
1092 /* scan/BSS handling */
1093 void ieee80211_scan_work(struct work_struct *work);
1094 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1095                                     const u8 *ssid, u8 ssid_len,
1096                                     struct ieee80211_channel *chan);
1097 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1098                            struct cfg80211_scan_request *req);
1099 void ieee80211_scan_cancel(struct ieee80211_local *local);
1100 ieee80211_rx_result
1101 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1102
1103 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1104 struct ieee80211_bss *
1105 ieee80211_bss_info_update(struct ieee80211_local *local,
1106                           struct ieee80211_rx_status *rx_status,
1107                           struct ieee80211_mgmt *mgmt,
1108                           size_t len,
1109                           struct ieee802_11_elems *elems,
1110                           struct ieee80211_channel *channel,
1111                           bool beacon);
1112 struct ieee80211_bss *
1113 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1114                      u8 *ssid, u8 ssid_len);
1115 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1116                           struct ieee80211_bss *bss);
1117
1118 /* off-channel helpers */
1119 void ieee80211_offchannel_stop_beaconing(struct ieee80211_local *local);
1120 void ieee80211_offchannel_stop_station(struct ieee80211_local *local);
1121 void ieee80211_offchannel_return(struct ieee80211_local *local,
1122                                  bool enable_beaconing);
1123
1124 /* interface handling */
1125 int ieee80211_iface_init(void);
1126 void ieee80211_iface_exit(void);
1127 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1128                      struct net_device **new_dev, enum nl80211_iftype type,
1129                      struct vif_params *params);
1130 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1131                              enum nl80211_iftype type);
1132 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1133 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1134 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1135 void ieee80211_recalc_idle(struct ieee80211_local *local);
1136 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1137                                     const int offset);
1138
1139 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1140 {
1141         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1142 }
1143
1144 /* tx handling */
1145 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1146 void ieee80211_tx_pending(unsigned long data);
1147 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1148                                          struct net_device *dev);
1149 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1150                                        struct net_device *dev);
1151
1152 /*
1153  * radiotap header for status frames
1154  */
1155 struct ieee80211_tx_status_rtap_hdr {
1156         struct ieee80211_radiotap_header hdr;
1157         u8 rate;
1158         u8 padding_for_rate;
1159         __le16 tx_flags;
1160         u8 data_retries;
1161 } __packed;
1162
1163
1164 /* HT */
1165 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1166                                        struct ieee80211_ht_cap *ht_cap_ie,
1167                                        struct ieee80211_sta_ht_cap *ht_cap);
1168 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1169 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1170                           const u8 *da, u16 tid,
1171                           u16 initiator, u16 reason_code);
1172 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1173                                enum ieee80211_smps_mode smps, const u8 *da,
1174                                const u8 *bssid);
1175 void ieee80211_request_smps_work(struct work_struct *work);
1176
1177 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1178                                      u16 initiator, u16 reason, bool stop);
1179 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1180                                     u16 initiator, u16 reason, bool stop);
1181 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1182 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1183                              struct sta_info *sta,
1184                              struct ieee80211_mgmt *mgmt, size_t len);
1185 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1186                                   struct sta_info *sta,
1187                                   struct ieee80211_mgmt *mgmt,
1188                                   size_t len);
1189 void ieee80211_process_addba_request(struct ieee80211_local *local,
1190                                      struct sta_info *sta,
1191                                      struct ieee80211_mgmt *mgmt,
1192                                      size_t len);
1193
1194 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1195                                    enum ieee80211_back_parties initiator,
1196                                    bool tx);
1197 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1198                                     enum ieee80211_back_parties initiator,
1199                                     bool tx);
1200 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1201 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1202 void ieee80211_ba_session_work(struct work_struct *work);
1203 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1204 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1205
1206 /* Spectrum management */
1207 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1208                                        struct ieee80211_mgmt *mgmt,
1209                                        size_t len);
1210
1211 /* Suspend/resume and hw reconfiguration */
1212 int ieee80211_reconfig(struct ieee80211_local *local);
1213 void ieee80211_stop_device(struct ieee80211_local *local);
1214
1215 #ifdef CONFIG_PM
1216 int __ieee80211_suspend(struct ieee80211_hw *hw);
1217
1218 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1219 {
1220         struct ieee80211_local *local = hw_to_local(hw);
1221
1222         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1223                 "%s: resume with hardware scan still in progress\n",
1224                 wiphy_name(hw->wiphy));
1225
1226         return ieee80211_reconfig(hw_to_local(hw));
1227 }
1228 #else
1229 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1230 {
1231         return 0;
1232 }
1233
1234 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1235 {
1236         return 0;
1237 }
1238 #endif
1239
1240 /* utility functions/constants */
1241 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1242 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1243                         enum nl80211_iftype type);
1244 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1245                              int rate, int erp, int short_preamble);
1246 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1247                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1248                                      gfp_t gfp);
1249 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1250 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1251 void ieee802_11_parse_elems(u8 *start, size_t len,
1252                             struct ieee802_11_elems *elems);
1253 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1254                                struct ieee802_11_elems *elems,
1255                                u64 filter, u32 crc);
1256 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1257                               enum ieee80211_band band);
1258
1259 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1260 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1261 void ieee80211_dynamic_ps_timer(unsigned long data);
1262 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1263                              struct ieee80211_sub_if_data *sdata,
1264                              int powersave);
1265 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1266                              struct ieee80211_hdr *hdr);
1267 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1268
1269 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1270                                      enum queue_stop_reason reason);
1271 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1272                                      enum queue_stop_reason reason);
1273 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1274                                     enum queue_stop_reason reason);
1275 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1276                                     enum queue_stop_reason reason);
1277 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1278                                struct sk_buff *skb);
1279 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1280                                struct sk_buff_head *skbs);
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 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1291                               const u8 *ssid, size_t ssid_len,
1292                               const u8 *ie, size_t ie_len);
1293
1294 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1295                                   const size_t supp_rates_len,
1296                                   const u8 *supp_rates);
1297 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1298                             struct ieee802_11_elems *elems,
1299                             enum ieee80211_band band);
1300 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1301                              enum ieee80211_smps_mode smps_mode);
1302 void ieee80211_recalc_smps(struct ieee80211_local *local);
1303
1304 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1305                           const u8 *ids, int n_ids, size_t offset);
1306 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1307
1308 /* internal work items */
1309 void ieee80211_work_init(struct ieee80211_local *local);
1310 void ieee80211_add_work(struct ieee80211_work *wk);
1311 void free_work(struct ieee80211_work *wk);
1312 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1313 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1314                                            struct sk_buff *skb);
1315 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1316                                    struct ieee80211_channel *chan,
1317                                    enum nl80211_channel_type channel_type,
1318                                    unsigned int duration, u64 *cookie);
1319 int ieee80211_wk_cancel_remain_on_channel(
1320         struct ieee80211_sub_if_data *sdata, u64 cookie);
1321
1322 /* channel management */
1323 enum ieee80211_chan_mode {
1324         CHAN_MODE_UNDEFINED,
1325         CHAN_MODE_HOPPING,
1326         CHAN_MODE_FIXED,
1327 };
1328
1329 enum ieee80211_chan_mode
1330 ieee80211_get_channel_mode(struct ieee80211_local *local,
1331                            struct ieee80211_sub_if_data *ignore);
1332 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1333                                 struct ieee80211_sub_if_data *sdata,
1334                                 enum nl80211_channel_type chantype);
1335
1336 #ifdef CONFIG_MAC80211_NOINLINE
1337 #define debug_noinline noinline
1338 #else
1339 #define debug_noinline
1340 #endif
1341
1342 #endif /* IEEE80211_I_H */