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 <linux/leds.h>
  27 #include <net/ieee80211_radiotap.h>
  28 #include <net/cfg80211.h>
  29 #include <net/mac80211.h>
  30 #include "key.h"
  31 #include "sta_info.h"
  32
  33 struct ieee80211_local;
  34
  35 /* Maximum number of broadcast/multicast frames to buffer when some of the
  36  * associated stations are using power saving. */
  37 #define AP_MAX_BC_BUFFER 128
  38
  39 /* Maximum number of frames buffered to all STAs, including multicast frames.
  40  * Note: increasing this limit increases the potential memory requirement. Each
  41  * frame can be up to about 2 kB long. */
  42 #define TOTAL_MAX_TX_BUFFER 512
  43
  44 /* Required encryption head and tailroom */
  45 #define IEEE80211_ENCRYPT_HEADROOM 8
  46 #define IEEE80211_ENCRYPT_TAILROOM 18
  47
  48 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  49  * reception of at least three fragmented frames. This limit can be increased
  50  * by changing this define, at the cost of slower frame reassembly and
  51  * increased memory use (about 2 kB of RAM per entry). */
  52 #define IEEE80211_FRAGMENT_MAX 4
  53
  54 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  55
  56 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
  57         (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK |   \
  58          IEEE80211_WMM_IE_STA_QOSINFO_AC_BE |   \
  59          IEEE80211_WMM_IE_STA_QOSINFO_AC_VI |   \
  60          IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
  61
  62 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  63         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  64
  65 struct ieee80211_fragment_entry {
  66         unsigned long first_frag_time;
  67         unsigned int seq;
  68         unsigned int rx_queue;
  69         unsigned int last_frag;
  70         unsigned int extra_len;
  71         struct sk_buff_head skb_list;
  72         int ccmp; /* Whether fragments were encrypted with CCMP */
  73         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  74 };
  75
  76
  77 struct ieee80211_bss {
  78         /* don't want to look up all the time */
  79         size_t ssid_len;
  80         u8 ssid[IEEE80211_MAX_SSID_LEN];
  81
  82         u8 dtim_period;
  83
  84         bool wmm_used;
  85         bool uapsd_supported;
  86
  87         unsigned long last_probe_resp;
  88
  89 #ifdef CONFIG_MAC80211_MESH
  90         u8 *mesh_id;
  91         size_t mesh_id_len;
  92         u8 *mesh_cfg;
  93 #endif
  94
  95 #define IEEE80211_MAX_SUPP_RATES 32
  96         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  97         size_t supp_rates_len;
  98
  99         /*
 100          * During association, we save an ERP value from a probe response so
 101          * that we can feed ERP info to the driver when handling the
 102          * association completes. these fields probably won't be up-to-date
 103          * otherwise, you probably don't want to use them.
 104          */
 105         bool has_erp_value;
 106         u8 erp_value;
 107 };
 108
 109 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 110 {
 111 #ifdef CONFIG_MAC80211_MESH
 112         return bss->mesh_cfg;
 113 #endif
 114         return NULL;
 115 }
 116
 117 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 118 {
 119 #ifdef CONFIG_MAC80211_MESH
 120         return bss->mesh_id;
 121 #endif
 122         return NULL;
 123 }
 124
 125 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 126 {
 127 #ifdef CONFIG_MAC80211_MESH
 128         return bss->mesh_id_len;
 129 #endif
 130         return 0;
 131 }
 132
 133
 134 typedef unsigned __bitwise__ ieee80211_tx_result;
 135 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 136 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 137 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 138
 139 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 140 #define IEEE80211_TX_UNICAST            BIT(1)
 141 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 142
 143 struct ieee80211_tx_data {
 144         struct sk_buff *skb;
 145         struct ieee80211_local *local;
 146         struct ieee80211_sub_if_data *sdata;
 147         struct sta_info *sta;
 148         struct ieee80211_key *key;
 149
 150         struct ieee80211_channel *channel;
 151
 152         u16 ethertype;
 153         unsigned int flags;
 154 };
 155
 156
 157 typedef unsigned __bitwise__ ieee80211_rx_result;
 158 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 159 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 160 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 161 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 162
 163 /**
 164  * enum ieee80211_packet_rx_flags - packet RX flags
 165  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
 166  *      (incl. multicast frames)
 167  * @IEEE80211_RX_IN_SCAN: received while scanning
 168  * @IEEE80211_RX_FRAGMENTED: fragmented frame
 169  * @IEEE80211_RX_AMSDU: a-MSDU packet
 170  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 171  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 172  *
 173  * These are per-frame flags that are attached to a frame in the
 174  * @rx_flags field of &struct ieee80211_rx_status.
 175  */
 176 enum ieee80211_packet_rx_flags {
 177         IEEE80211_RX_IN_SCAN                    = BIT(0),
 178         IEEE80211_RX_RA_MATCH                   = BIT(1),
 179         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 180         IEEE80211_RX_AMSDU                      = BIT(3),
 181         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 182         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 183 };
 184
 185 /**
 186  * enum ieee80211_rx_flags - RX data flags
 187  *
 188  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 189  *
 190  * These flags are used across handling multiple interfaces
 191  * for a single frame.
 192  */
 193 enum ieee80211_rx_flags {
 194         IEEE80211_RX_CMNTR              = BIT(0),
 195 };
 196
 197 struct ieee80211_rx_data {
 198         struct sk_buff *skb;
 199         struct ieee80211_local *local;
 200         struct ieee80211_sub_if_data *sdata;
 201         struct sta_info *sta;
 202         struct ieee80211_key *key;
 203
 204         unsigned int flags;
 205
 206         /*
 207          * Index into sequence numbers array, 0..16
 208          * since the last (16) is used for non-QoS,
 209          * will be 16 on non-QoS frames.
 210          */
 211         int seqno_idx;
 212
 213         /*
 214          * Index into the security IV/PN arrays, 0..16
 215          * since the last (16) is used for CCMP-encrypted
 216          * management frames, will be set to 16 on mgmt
 217          * frames and 0 on non-QoS frames.
 218          */
 219         int security_idx;
 220
 221         u32 tkip_iv32;
 222         u16 tkip_iv16;
 223 };
 224
 225 struct beacon_data {
 226         u8 *head, *tail;
 227         int head_len, tail_len;
 228         int dtim_period;
 229 };
 230
 231 struct ieee80211_if_ap {
 232         struct beacon_data __rcu *beacon;
 233
 234         struct list_head vlans;
 235
 236         /* yes, this looks ugly, but guarantees that we can later use
 237          * bitmap_empty :)
 238          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 239         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 240         struct sk_buff_head ps_bc_buf;
 241         atomic_t num_sta_ps; /* number of stations in PS mode */
 242         int dtim_count;
 243         bool dtim_bc_mc;
 244 };
 245
 246 struct ieee80211_if_wds {
 247         struct sta_info *sta;
 248         u8 remote_addr[ETH_ALEN];
 249 };
 250
 251 struct ieee80211_if_vlan {
 252         struct list_head list;
 253
 254         /* used for all tx if the VLAN is configured to 4-addr mode */
 255         struct sta_info __rcu *sta;
 256 };
 257
 258 struct mesh_stats {
 259         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 260         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 261         __u32 fwded_frames;             /* Mesh total forwarded frames */
 262         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 263         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 264         atomic_t estab_plinks;
 265 };
 266
 267 #define PREQ_Q_F_START          0x1
 268 #define PREQ_Q_F_REFRESH        0x2
 269 struct mesh_preq_queue {
 270         struct list_head list;
 271         u8 dst[ETH_ALEN];
 272         u8 flags;
 273 };
 274
 275 enum ieee80211_work_type {
 276         IEEE80211_WORK_ABORT,
 277         IEEE80211_WORK_DIRECT_PROBE,
 278         IEEE80211_WORK_AUTH,
 279         IEEE80211_WORK_ASSOC_BEACON_WAIT,
 280         IEEE80211_WORK_ASSOC,
 281         IEEE80211_WORK_REMAIN_ON_CHANNEL,
 282         IEEE80211_WORK_OFFCHANNEL_TX,
 283 };
 284
 285 /**
 286  * enum work_done_result - indicates what to do after work was done
 287  *
 288  * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
 289  * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
 290  *      should be requeued.
 291  */
 292 enum work_done_result {
 293         WORK_DONE_DESTROY,
 294         WORK_DONE_REQUEUE,
 295 };
 296
 297 struct ieee80211_work {
 298         struct list_head list;
 299
 300         struct rcu_head rcu_head;
 301
 302         struct ieee80211_sub_if_data *sdata;
 303
 304         enum work_done_result (*done)(struct ieee80211_work *wk,
 305                                       struct sk_buff *skb);
 306
 307         struct ieee80211_channel *chan;
 308         enum nl80211_channel_type chan_type;
 309
 310         unsigned long timeout;
 311         enum ieee80211_work_type type;
 312
 313         u8 filter_ta[ETH_ALEN];
 314
 315         bool started;
 316
 317         union {
 318                 struct {
 319                         int tries;
 320                         u16 algorithm, transaction;
 321                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 322                         u8 ssid_len;
 323                         u8 key[WLAN_KEY_LEN_WEP104];
 324                         u8 key_len, key_idx;
 325                         bool privacy;
 326                         bool synced;
 327                 } probe_auth;
 328                 struct {
 329                         struct cfg80211_bss *bss;
 330                         const u8 *supp_rates;
 331                         const u8 *ht_information_ie;
 332                         enum ieee80211_smps_mode smps;
 333                         int tries;
 334                         u16 capability;
 335                         u8 prev_bssid[ETH_ALEN];
 336                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 337                         u8 ssid_len;
 338                         u8 supp_rates_len;
 339                         bool wmm_used, use_11n, uapsd_used;
 340                         bool synced;
 341                 } assoc;
 342                 struct {
 343                         u32 duration;
 344                 } remain;
 345                 struct {
 346                         struct sk_buff *frame;
 347                         u32 wait;
 348                 } offchan_tx;
 349         };
 350
 351         int ie_len;
 352         /* must be last */
 353         u8 ie[0];
 354 };
 355
 356 /* flags used in struct ieee80211_if_managed.flags */
 357 enum ieee80211_sta_flags {
 358         IEEE80211_STA_BEACON_POLL       = BIT(0),
 359         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 360         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 361         IEEE80211_STA_DISABLE_11N       = BIT(4),
 362         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 363         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 364         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 365         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 366         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 367 };
 368
 369 struct ieee80211_if_managed {
 370         struct timer_list timer;
 371         struct timer_list conn_mon_timer;
 372         struct timer_list bcn_mon_timer;
 373         struct timer_list chswitch_timer;
 374         struct work_struct monitor_work;
 375         struct work_struct chswitch_work;
 376         struct work_struct beacon_connection_loss_work;
 377
 378         unsigned long beacon_timeout;
 379         unsigned long probe_timeout;
 380         int probe_send_count;
 381         bool nullfunc_failed;
 382
 383         struct mutex mtx;
 384         struct cfg80211_bss *associated;
 385
 386         u8 bssid[ETH_ALEN];
 387
 388         u16 aid;
 389
 390         unsigned long timers_running; /* used for quiesce/restart */
 391         bool powersave; /* powersave requested for this iface */
 392         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 393                                  ap_smps, /* smps mode AP thinks we're in */
 394                                  driver_smps_mode; /* smps mode request */
 395
 396         struct work_struct request_smps_work;
 397
 398         unsigned int flags;
 399
 400         bool beacon_crc_valid;
 401         u32 beacon_crc;
 402
 403         enum {
 404                 IEEE80211_MFP_DISABLED,
 405                 IEEE80211_MFP_OPTIONAL,
 406                 IEEE80211_MFP_REQUIRED
 407         } mfp; /* management frame protection */
 408
 409         int wmm_last_param_set;
 410
 411         u8 use_4addr;
 412
 413         /* Signal strength from the last Beacon frame in the current BSS. */
 414         int last_beacon_signal;
 415
 416         /*
 417          * Weighted average of the signal strength from Beacon frames in the
 418          * current BSS. This is in units of 1/16 of the signal unit to maintain
 419          * accuracy and to speed up calculations, i.e., the value need to be
 420          * divided by 16 to get the actual value.
 421          */
 422         int ave_beacon_signal;
 423
 424         /*
 425          * Number of Beacon frames used in ave_beacon_signal. This can be used
 426          * to avoid generating less reliable cqm events that would be based
 427          * only on couple of received frames.
 428          */
 429         unsigned int count_beacon_signal;
 430
 431         /*
 432          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 433          * that triggered a cqm event. 0 indicates that no event has been
 434          * generated for the current association.
 435          */
 436         int last_cqm_event_signal;
 437
 438         /*
 439          * State variables for keeping track of RSSI of the AP currently
 440          * connected to and informing driver when RSSI has gone
 441          * below/above a certain threshold.
 442          */
 443         int rssi_min_thold, rssi_max_thold;
 444         int last_ave_beacon_signal;
 445 };
 446
 447 struct ieee80211_if_ibss {
 448         struct timer_list timer;
 449
 450         struct mutex mtx;
 451
 452         unsigned long last_scan_completed;
 453
 454         u32 basic_rates;
 455
 456         bool timer_running;
 457
 458         bool fixed_bssid;
 459         bool fixed_channel;
 460         bool privacy;
 461
 462         u8 bssid[ETH_ALEN];
 463         u8 ssid[IEEE80211_MAX_SSID_LEN];
 464         u8 ssid_len, ie_len;
 465         u8 *ie;
 466         struct ieee80211_channel *channel;
 467
 468         unsigned long ibss_join_req;
 469         /* probe response/beacon for IBSS */
 470         struct sk_buff __rcu *presp;
 471         struct sk_buff *skb;
 472
 473         enum {
 474                 IEEE80211_IBSS_MLME_SEARCH,
 475                 IEEE80211_IBSS_MLME_JOINED,
 476         } state;
 477 };
 478
 479 struct ieee80211_if_mesh {
 480         struct timer_list housekeeping_timer;
 481         struct timer_list mesh_path_timer;
 482         struct timer_list mesh_path_root_timer;
 483
 484         unsigned long timers_running;
 485
 486         unsigned long wrkq_flags;
 487
 488         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 489         size_t mesh_id_len;
 490         /* Active Path Selection Protocol Identifier */
 491         u8 mesh_pp_id;
 492         /* Active Path Selection Metric Identifier */
 493         u8 mesh_pm_id;
 494         /* Congestion Control Mode Identifier */
 495         u8 mesh_cc_id;
 496         /* Synchronization Protocol Identifier */
 497         u8 mesh_sp_id;
 498         /* Authentication Protocol Identifier */
 499         u8 mesh_auth_id;
 500         /* Local mesh Sequence Number */
 501         u32 sn;
 502         /* Last used PREQ ID */
 503         u32 preq_id;
 504         atomic_t mpaths;
 505         /* Timestamp of last SN update */
 506         unsigned long last_sn_update;
 507         /* Timestamp of last SN sent */
 508         unsigned long last_preq;
 509         struct mesh_rmc *rmc;
 510         spinlock_t mesh_preq_queue_lock;
 511         struct mesh_preq_queue preq_queue;
 512         int preq_queue_len;
 513         struct mesh_stats mshstats;
 514         struct mesh_config mshcfg;
 515         u32 mesh_seqnum;
 516         bool accepting_plinks;
 517         const u8 *ie;
 518         u8 ie_len;
 519         enum {
 520                 IEEE80211_MESH_SEC_NONE = 0x0,
 521                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 522                 IEEE80211_MESH_SEC_SECURED = 0x2,
 523         } security;
 524 };
 525
 526 #ifdef CONFIG_MAC80211_MESH
 527 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 528         do { (msh)->mshstats.name++; } while (0)
 529 #else
 530 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 531         do { } while (0)
 532 #endif
 533
 534 /**
 535  * enum ieee80211_sub_if_data_flags - virtual interface flags
 536  *
 537  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 538  * @IEEE80211_SDATA_PROMISC: interface is promisc
 539  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 540  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 541  *      associated stations and deliver multicast frames both
 542  *      back to wireless media and to the local net stack.
 543  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 544  */
 545 enum ieee80211_sub_if_data_flags {
 546         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 547         IEEE80211_SDATA_PROMISC                 = BIT(1),
 548         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 549         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 550         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 551 };
 552
 553 /**
 554  * enum ieee80211_sdata_state_bits - virtual interface state bits
 555  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 556  *      mirrors netif_running() but is separate for interface type
 557  *      change handling while the interface is up
 558  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 559  *      mode, so queues are stopped
 560  */
 561 enum ieee80211_sdata_state_bits {
 562         SDATA_STATE_RUNNING,
 563         SDATA_STATE_OFFCHANNEL,
 564 };
 565
 566 struct ieee80211_sub_if_data {
 567         struct list_head list;
 568
 569         struct wireless_dev wdev;
 570
 571         /* keys */
 572         struct list_head key_list;
 573
 574         /* count for keys needing tailroom space allocation */
 575         int crypto_tx_tailroom_needed_cnt;
 576
 577         struct net_device *dev;
 578         struct ieee80211_local *local;
 579
 580         unsigned int flags;
 581
 582         unsigned long state;
 583
 584         int drop_unencrypted;
 585
 586         char name[IFNAMSIZ];
 587
 588         /*
 589          * keep track of whether the HT opmode (stored in
 590          * vif.bss_info.ht_operation_mode) is valid.
 591          */
 592         bool ht_opmode_valid;
 593
 594         /* to detect idle changes */
 595         bool old_idle;
 596
 597         /* Fragment table for host-based reassembly */
 598         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 599         unsigned int fragment_next;
 600
 601         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 602         struct ieee80211_key __rcu *default_unicast_key;
 603         struct ieee80211_key __rcu *default_multicast_key;
 604         struct ieee80211_key __rcu *default_mgmt_key;
 605
 606         u16 sequence_number;
 607         __be16 control_port_protocol;
 608         bool control_port_no_encrypt;
 609
 610         struct work_struct work;
 611         struct sk_buff_head skb_queue;
 612
 613         bool arp_filter_state;
 614
 615         /*
 616          * AP this belongs to: self in AP mode and
 617          * corresponding AP in VLAN mode, NULL for
 618          * all others (might be needed later in IBSS)
 619          */
 620         struct ieee80211_if_ap *bss;
 621
 622         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 623         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 624
 625         union {
 626                 struct ieee80211_if_ap ap;
 627                 struct ieee80211_if_wds wds;
 628                 struct ieee80211_if_vlan vlan;
 629                 struct ieee80211_if_managed mgd;
 630                 struct ieee80211_if_ibss ibss;
 631                 struct ieee80211_if_mesh mesh;
 632                 u32 mntr_flags;
 633         } u;
 634
 635 #ifdef CONFIG_MAC80211_DEBUGFS
 636         struct {
 637                 struct dentry *dir;
 638                 struct dentry *subdir_stations;
 639                 struct dentry *default_unicast_key;
 640                 struct dentry *default_multicast_key;
 641                 struct dentry *default_mgmt_key;
 642         } debugfs;
 643 #endif
 644         /* must be last, dynamically sized area in this! */
 645         struct ieee80211_vif vif;
 646 };
 647
 648 static inline
 649 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 650 {
 651         return container_of(p, struct ieee80211_sub_if_data, vif);
 652 }
 653
 654 enum sdata_queue_type {
 655         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 656         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 657         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 658 };
 659
 660 enum {
 661         IEEE80211_RX_MSG        = 1,
 662         IEEE80211_TX_STATUS_MSG = 2,
 663 };
 664
 665 enum queue_stop_reason {
 666         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 667         IEEE80211_QUEUE_STOP_REASON_PS,
 668         IEEE80211_QUEUE_STOP_REASON_CSA,
 669         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 670         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 671         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 672 };
 673
 674 #ifdef CONFIG_MAC80211_LEDS
 675 struct tpt_led_trigger {
 676         struct led_trigger trig;
 677         char name[32];
 678         const struct ieee80211_tpt_blink *blink_table;
 679         unsigned int blink_table_len;
 680         struct timer_list timer;
 681         unsigned long prev_traffic;
 682         unsigned long tx_bytes, rx_bytes;
 683         unsigned int active, want;
 684         bool running;
 685 };
 686 #endif
 687
 688 /**
 689  * mac80211 scan flags - currently active scan mode
 690  *
 691  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 692  *      well be on the operating channel
 693  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 694  *      determine if we are on the operating channel or not
 695  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 696  *      that the scan completed.
 697  * @SCAN_ABORTED: Set for our scan work function when the driver reported
 698  *      a scan complete for an aborted scan.
 699  */
 700 enum {
 701         SCAN_SW_SCANNING,
 702         SCAN_HW_SCANNING,
 703         SCAN_COMPLETED,
 704         SCAN_ABORTED,
 705 };
 706
 707 /**
 708  * enum mac80211_scan_state - scan state machine states
 709  *
 710  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 711  *      determines if we should keep on scanning or switch back to the
 712  *      operating channel
 713  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 714  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 715  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 716  *      about us leaving the channel and stop all associated STA interfaces
 717  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 718  *      AP about us being back and restart all associated STA interfaces
 719  */
 720 enum mac80211_scan_state {
 721         SCAN_DECISION,
 722         SCAN_SET_CHANNEL,
 723         SCAN_SEND_PROBE,
 724         SCAN_LEAVE_OPER_CHANNEL,
 725         SCAN_ENTER_OPER_CHANNEL,
 726 };
 727
 728 struct ieee80211_local {
 729         /* embed the driver visible part.
 730          * don't cast (use the static inlines below), but we keep
 731          * it first anyway so they become a no-op */
 732         struct ieee80211_hw hw;
 733
 734         const struct ieee80211_ops *ops;
 735
 736         /*
 737          * work stuff, potentially off-channel (in the future)
 738          */
 739         struct list_head work_list;
 740         struct timer_list work_timer;
 741         struct work_struct work_work;
 742         struct sk_buff_head work_skb_queue;
 743
 744         /*
 745          * private workqueue to mac80211. mac80211 makes this accessible
 746          * via ieee80211_queue_work()
 747          */
 748         struct workqueue_struct *workqueue;
 749
 750         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 751         struct ieee80211_tx_queue_params tx_conf[IEEE80211_MAX_QUEUES];
 752         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 753         spinlock_t queue_stop_reason_lock;
 754
 755         int open_count;
 756         int monitors, cooked_mntrs;
 757         /* number of interfaces with corresponding FIF_ flags */
 758         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 759             fif_probe_req;
 760         int probe_req_reg;
 761         unsigned int filter_flags; /* FIF_* */
 762
 763         bool wiphy_ciphers_allocated;
 764
 765         /* protects the aggregated multicast list and filter calls */
 766         spinlock_t filter_lock;
 767
 768         /* used for uploading changed mc list */
 769         struct work_struct reconfig_filter;
 770
 771         /* used to reconfigure hardware SM PS */
 772         struct work_struct recalc_smps;
 773
 774         /* aggregated multicast list */
 775         struct netdev_hw_addr_list mc_list;
 776
 777         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 778
 779         /*
 780          * suspended is true if we finished all the suspend _and_ we have
 781          * not yet come up from resume. This is to be used by mac80211
 782          * to ensure driver sanity during suspend and mac80211's own
 783          * sanity. It can eventually be used for WoW as well.
 784          */
 785         bool suspended;
 786
 787         /*
 788          * Resuming is true while suspended, but when we're reprogramming the
 789          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 790          * again even though some other parts of the stack are still suspended
 791          * and we still drop received frames to avoid waking the stack.
 792          */
 793         bool resuming;
 794
 795         /*
 796          * quiescing is true during the suspend process _only_ to
 797          * ease timer cancelling etc.
 798          */
 799         bool quiescing;
 800
 801         /* device is started */
 802         bool started;
 803
 804         /* wowlan is enabled -- don't reconfig on resume */
 805         bool wowlan;
 806
 807         int tx_headroom; /* required headroom for hardware/radiotap */
 808
 809         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 810          * added to skb_queue will be processed, but frames in
 811          * skb_queue_unreliable may be dropped if the total length of these
 812          * queues increases over the limit. */
 813 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 814         struct tasklet_struct tasklet;
 815         struct sk_buff_head skb_queue;
 816         struct sk_buff_head skb_queue_unreliable;
 817
 818         /*
 819          * Internal FIFO queue which is shared between multiple rx path
 820          * stages. Its main task is to provide a serialization mechanism,
 821          * so all rx handlers can enjoy having exclusive access to their
 822          * private data structures.
 823          */
 824         struct sk_buff_head rx_skb_queue;
 825         bool running_rx_handler;        /* protected by rx_skb_queue.lock */
 826
 827         /* Station data */
 828         /*
 829          * The mutex only protects the list and counter,
 830          * reads are done in RCU.
 831          * Additionally, the lock protects the hash table,
 832          * the pending list and each BSS's TIM bitmap.
 833          */
 834         struct mutex sta_mtx;
 835         spinlock_t sta_lock;
 836         unsigned long num_sta;
 837         struct list_head sta_list, sta_pending_list;
 838         struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
 839         struct timer_list sta_cleanup;
 840         struct work_struct sta_finish_work;
 841         int sta_generation;
 842
 843         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 844         struct tasklet_struct tx_pending_tasklet;
 845
 846         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 847
 848         /* number of interfaces with corresponding IFF_ flags */
 849         atomic_t iff_allmultis, iff_promiscs;
 850
 851         struct rate_control_ref *rate_ctrl;
 852
 853         struct crypto_cipher *wep_tx_tfm;
 854         struct crypto_cipher *wep_rx_tfm;
 855         u32 wep_iv;
 856
 857         /* see iface.c */
 858         struct list_head interfaces;
 859         struct mutex iflist_mtx;
 860
 861         /*
 862          * Key mutex, protects sdata's key_list and sta_info's
 863          * key pointers (write access, they're RCU.)
 864          */
 865         struct mutex key_mtx;
 866
 867         /* mutex for scan and work locking */
 868         struct mutex mtx;
 869
 870         /* Scanning and BSS list */
 871         unsigned long scanning;
 872         struct cfg80211_ssid scan_ssid;
 873         struct cfg80211_scan_request *int_scan_req;
 874         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 875         struct ieee80211_channel *scan_channel;
 876         enum ieee80211_band hw_scan_band;
 877         int scan_channel_idx;
 878         int scan_ies_len;
 879
 880         bool sched_scanning;
 881         struct ieee80211_sched_scan_ies sched_scan_ies;
 882         struct work_struct sched_scan_stopped_work;
 883
 884         unsigned long leave_oper_channel_time;
 885         enum mac80211_scan_state next_scan_state;
 886         struct delayed_work scan_work;
 887         struct ieee80211_sub_if_data *scan_sdata;
 888         enum nl80211_channel_type _oper_channel_type;
 889         struct ieee80211_channel *oper_channel, *csa_channel;
 890
 891         /* Temporary remain-on-channel for off-channel operations */
 892         struct ieee80211_channel *tmp_channel;
 893         enum nl80211_channel_type tmp_channel_type;
 894
 895         /* SNMP counters */
 896         /* dot11CountersTable */
 897         u32 dot11TransmittedFragmentCount;
 898         u32 dot11MulticastTransmittedFrameCount;
 899         u32 dot11FailedCount;
 900         u32 dot11RetryCount;
 901         u32 dot11MultipleRetryCount;
 902         u32 dot11FrameDuplicateCount;
 903         u32 dot11ReceivedFragmentCount;
 904         u32 dot11MulticastReceivedFrameCount;
 905         u32 dot11TransmittedFrameCount;
 906
 907 #ifdef CONFIG_MAC80211_LEDS
 908         int tx_led_counter, rx_led_counter;
 909         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 910         struct tpt_led_trigger *tpt_led_trigger;
 911         char tx_led_name[32], rx_led_name[32],
 912              assoc_led_name[32], radio_led_name[32];
 913 #endif
 914
 915 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 916         /* TX/RX handler statistics */
 917         unsigned int tx_handlers_drop;
 918         unsigned int tx_handlers_queued;
 919         unsigned int tx_handlers_drop_unencrypted;
 920         unsigned int tx_handlers_drop_fragment;
 921         unsigned int tx_handlers_drop_wep;
 922         unsigned int tx_handlers_drop_not_assoc;
 923         unsigned int tx_handlers_drop_unauth_port;
 924         unsigned int rx_handlers_drop;
 925         unsigned int rx_handlers_queued;
 926         unsigned int rx_handlers_drop_nullfunc;
 927         unsigned int rx_handlers_drop_defrag;
 928         unsigned int rx_handlers_drop_short;
 929         unsigned int rx_handlers_drop_passive_scan;
 930         unsigned int tx_expand_skb_head;
 931         unsigned int tx_expand_skb_head_cloned;
 932         unsigned int rx_expand_skb_head;
 933         unsigned int rx_expand_skb_head2;
 934         unsigned int rx_handlers_fragments;
 935         unsigned int tx_status_drop;
 936 #define I802_DEBUG_INC(c) (c)++
 937 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 938 #define I802_DEBUG_INC(c) do { } while (0)
 939 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 940
 941
 942         int total_ps_buffered; /* total number of all buffered unicast and
 943                                 * multicast packets for power saving stations
 944                                 */
 945         int wifi_wme_noack_test;
 946         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 947
 948         /*
 949          * Bitmask of enabled u-apsd queues,
 950          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 951          * to take effect.
 952          */
 953         unsigned int uapsd_queues;
 954
 955         /*
 956          * Maximum number of buffered frames AP can deliver during a
 957          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 958          * Needs a new association to take effect.
 959          */
 960         unsigned int uapsd_max_sp_len;
 961
 962         bool pspolling;
 963         bool offchannel_ps_enabled;
 964         /*
 965          * PS can only be enabled when we have exactly one managed
 966          * interface (and monitors) in PS, this then points there.
 967          */
 968         struct ieee80211_sub_if_data *ps_sdata;
 969         struct work_struct dynamic_ps_enable_work;
 970         struct work_struct dynamic_ps_disable_work;
 971         struct timer_list dynamic_ps_timer;
 972         struct notifier_block network_latency_notifier;
 973         struct notifier_block ifa_notifier;
 974
 975         /*
 976          * The dynamic ps timeout configured from user space via WEXT -
 977          * this will override whatever chosen by mac80211 internally.
 978          */
 979         int dynamic_ps_forced_timeout;
 980         int dynamic_ps_user_timeout;
 981         bool disable_dynamic_ps;
 982
 983         int user_power_level; /* in dBm */
 984         int power_constr_level; /* in dBm */
 985
 986         enum ieee80211_smps_mode smps_mode;
 987
 988         struct work_struct restart_work;
 989
 990 #ifdef CONFIG_MAC80211_DEBUGFS
 991         struct local_debugfsdentries {
 992                 struct dentry *rcdir;
 993                 struct dentry *keys;
 994         } debugfs;
 995 #endif
 996
 997         struct ieee80211_channel *hw_roc_channel;
 998         struct net_device *hw_roc_dev;
 999         struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
1000         struct work_struct hw_roc_start, hw_roc_done;
1001         enum nl80211_channel_type hw_roc_channel_type;
1002         unsigned int hw_roc_duration;
1003         u32 hw_roc_cookie;
1004         bool hw_roc_for_tx;
1005         unsigned long hw_offchan_tx_cookie;
1006
1007         /* dummy netdev for use w/ NAPI */
1008         struct net_device napi_dev;
1009
1010         struct napi_struct napi;
1011 };
1012
1013 static inline struct ieee80211_sub_if_data *
1014 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1015 {
1016         return netdev_priv(dev);
1017 }
1018
1019 /* this struct represents 802.11n's RA/TID combination */
1020 struct ieee80211_ra_tid {
1021         u8 ra[ETH_ALEN];
1022         u16 tid;
1023 };
1024
1025 /* Parsed Information Elements */
1026 struct ieee802_11_elems {
1027         u8 *ie_start;
1028         size_t total_len;
1029
1030         /* pointers to IEs */
1031         u8 *ssid;
1032         u8 *supp_rates;
1033         u8 *fh_params;
1034         u8 *ds_params;
1035         u8 *cf_params;
1036         struct ieee80211_tim_ie *tim;
1037         u8 *ibss_params;
1038         u8 *challenge;
1039         u8 *wpa;
1040         u8 *rsn;
1041         u8 *erp_info;
1042         u8 *ext_supp_rates;
1043         u8 *wmm_info;
1044         u8 *wmm_param;
1045         struct ieee80211_ht_cap *ht_cap_elem;
1046         struct ieee80211_ht_info *ht_info_elem;
1047         struct ieee80211_meshconf_ie *mesh_config;
1048         u8 *mesh_id;
1049         u8 *peer_link;
1050         u8 *preq;
1051         u8 *prep;
1052         u8 *perr;
1053         struct ieee80211_rann_ie *rann;
1054         u8 *ch_switch_elem;
1055         u8 *country_elem;
1056         u8 *pwr_constr_elem;
1057         u8 *quiet_elem;         /* first quite element */
1058         u8 *timeout_int;
1059
1060         /* length of them, respectively */
1061         u8 ssid_len;
1062         u8 supp_rates_len;
1063         u8 fh_params_len;
1064         u8 ds_params_len;
1065         u8 cf_params_len;
1066         u8 tim_len;
1067         u8 ibss_params_len;
1068         u8 challenge_len;
1069         u8 wpa_len;
1070         u8 rsn_len;
1071         u8 erp_info_len;
1072         u8 ext_supp_rates_len;
1073         u8 wmm_info_len;
1074         u8 wmm_param_len;
1075         u8 mesh_id_len;
1076         u8 peer_link_len;
1077         u8 preq_len;
1078         u8 prep_len;
1079         u8 perr_len;
1080         u8 ch_switch_elem_len;
1081         u8 country_elem_len;
1082         u8 pwr_constr_elem_len;
1083         u8 quiet_elem_len;
1084         u8 num_of_quiet_elem;   /* can be more the one */
1085         u8 timeout_int_len;
1086 };
1087
1088 static inline struct ieee80211_local *hw_to_local(
1089         struct ieee80211_hw *hw)
1090 {
1091         return container_of(hw, struct ieee80211_local, hw);
1092 }
1093
1094 static inline struct ieee80211_hw *local_to_hw(
1095         struct ieee80211_local *local)
1096 {
1097         return &local->hw;
1098 }
1099
1100
1101 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1102 {
1103         return compare_ether_addr(raddr, addr) == 0 ||
1104                is_broadcast_ether_addr(raddr);
1105 }
1106
1107
1108 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1109 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1110 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1111                                       u32 changed);
1112 void ieee80211_configure_filter(struct ieee80211_local *local);
1113 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1114
1115 /* STA code */
1116 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1117 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1118                        struct cfg80211_auth_request *req);
1119 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1120                         struct cfg80211_assoc_request *req);
1121 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1122                          struct cfg80211_deauth_request *req,
1123                          void *cookie);
1124 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1125                            struct cfg80211_disassoc_request *req,
1126                            void *cookie);
1127 void ieee80211_send_pspoll(struct ieee80211_local *local,
1128                            struct ieee80211_sub_if_data *sdata);
1129 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1130 int ieee80211_max_network_latency(struct notifier_block *nb,
1131                                   unsigned long data, void *dummy);
1132 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1133 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1134                                       struct ieee80211_channel_sw_ie *sw_elem,
1135                                       struct ieee80211_bss *bss,
1136                                       u64 timestamp);
1137 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1138 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1139 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1140 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1141                                   struct sk_buff *skb);
1142 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1143 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1144
1145 /* IBSS code */
1146 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1147 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1148 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1149                                         u8 *bssid, u8 *addr, u32 supp_rates,
1150                                         gfp_t gfp);
1151 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1152                         struct cfg80211_ibss_params *params);
1153 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1154 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1155 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1156 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1157 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1158                                    struct sk_buff *skb);
1159
1160 /* mesh code */
1161 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1162 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1163                                    struct sk_buff *skb);
1164
1165 /* scan/BSS handling */
1166 void ieee80211_scan_work(struct work_struct *work);
1167 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1168                                     const u8 *ssid, u8 ssid_len,
1169                                     struct ieee80211_channel *chan);
1170 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1171                            struct cfg80211_scan_request *req);
1172 void ieee80211_scan_cancel(struct ieee80211_local *local);
1173 ieee80211_rx_result
1174 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1175
1176 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1177 struct ieee80211_bss *
1178 ieee80211_bss_info_update(struct ieee80211_local *local,
1179                           struct ieee80211_rx_status *rx_status,
1180                           struct ieee80211_mgmt *mgmt,
1181                           size_t len,
1182                           struct ieee802_11_elems *elems,
1183                           struct ieee80211_channel *channel,
1184                           bool beacon);
1185 struct ieee80211_bss *
1186 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1187                      u8 *ssid, u8 ssid_len);
1188 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1189                           struct ieee80211_bss *bss);
1190
1191 /* scheduled scan handling */
1192 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1193                                        struct cfg80211_sched_scan_request *req);
1194 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1195 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1196
1197 /* off-channel helpers */
1198 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local);
1199 void ieee80211_offchannel_enable_all_ps(struct ieee80211_local *local,
1200                                         bool tell_ap);
1201 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1202                                     bool offchannel_ps_enable);
1203 void ieee80211_offchannel_return(struct ieee80211_local *local,
1204                                  bool enable_beaconing,
1205                                  bool offchannel_ps_disable);
1206 void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1207
1208 /* interface handling */
1209 int ieee80211_iface_init(void);
1210 void ieee80211_iface_exit(void);
1211 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1212                      struct net_device **new_dev, enum nl80211_iftype type,
1213                      struct vif_params *params);
1214 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1215                              enum nl80211_iftype type);
1216 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1217 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1218 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1219 void ieee80211_recalc_idle(struct ieee80211_local *local);
1220 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1221                                     const int offset);
1222
1223 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1224 {
1225         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1226 }
1227
1228 /* tx handling */
1229 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1230 void ieee80211_tx_pending(unsigned long data);
1231 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1232                                          struct net_device *dev);
1233 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1234                                        struct net_device *dev);
1235
1236 /*
1237  * radiotap header for status frames
1238  */
1239 struct ieee80211_tx_status_rtap_hdr {
1240         struct ieee80211_radiotap_header hdr;
1241         u8 rate;
1242         u8 padding_for_rate;
1243         __le16 tx_flags;
1244         u8 data_retries;
1245 } __packed;
1246
1247
1248 /* HT */
1249 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1250                                        struct ieee80211_ht_cap *ht_cap_ie,
1251                                        struct ieee80211_sta_ht_cap *ht_cap);
1252 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1253 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1254                           const u8 *da, u16 tid,
1255                           u16 initiator, u16 reason_code);
1256 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1257                                enum ieee80211_smps_mode smps, const u8 *da,
1258                                const u8 *bssid);
1259 void ieee80211_request_smps_work(struct work_struct *work);
1260
1261 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1262                                      u16 initiator, u16 reason, bool stop);
1263 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1264                                     u16 initiator, u16 reason, bool stop);
1265 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1266 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1267                              struct sta_info *sta,
1268                              struct ieee80211_mgmt *mgmt, size_t len);
1269 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1270                                   struct sta_info *sta,
1271                                   struct ieee80211_mgmt *mgmt,
1272                                   size_t len);
1273 void ieee80211_process_addba_request(struct ieee80211_local *local,
1274                                      struct sta_info *sta,
1275                                      struct ieee80211_mgmt *mgmt,
1276                                      size_t len);
1277
1278 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1279                                    enum ieee80211_back_parties initiator,
1280                                    bool tx);
1281 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1282                                     enum ieee80211_back_parties initiator,
1283                                     bool tx);
1284 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1285 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1286 void ieee80211_ba_session_work(struct work_struct *work);
1287 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1288 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1289
1290 /* Spectrum management */
1291 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1292                                        struct ieee80211_mgmt *mgmt,
1293                                        size_t len);
1294
1295 /* Suspend/resume and hw reconfiguration */
1296 int ieee80211_reconfig(struct ieee80211_local *local);
1297 void ieee80211_stop_device(struct ieee80211_local *local);
1298
1299 #ifdef CONFIG_PM
1300 int __ieee80211_suspend(struct ieee80211_hw *hw,
1301                         struct cfg80211_wowlan *wowlan);
1302
1303 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1304 {
1305         struct ieee80211_local *local = hw_to_local(hw);
1306
1307         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1308                 "%s: resume with hardware scan still in progress\n",
1309                 wiphy_name(hw->wiphy));
1310
1311         return ieee80211_reconfig(hw_to_local(hw));
1312 }
1313 #else
1314 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1315                                       struct cfg80211_wowlan *wowlan)
1316 {
1317         return 0;
1318 }
1319
1320 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1321 {
1322         return 0;
1323 }
1324 #endif
1325
1326 /* utility functions/constants */
1327 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1328 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1329                         enum nl80211_iftype type);
1330 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1331                              int rate, int erp, int short_preamble);
1332 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1333                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1334                                      gfp_t gfp);
1335 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1336 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1337 void ieee802_11_parse_elems(u8 *start, size_t len,
1338                             struct ieee802_11_elems *elems);
1339 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1340                                struct ieee802_11_elems *elems,
1341                                u64 filter, u32 crc);
1342 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1343                               enum ieee80211_band band);
1344
1345 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1346 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1347 void ieee80211_dynamic_ps_timer(unsigned long data);
1348 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1349                              struct ieee80211_sub_if_data *sdata,
1350                              int powersave);
1351 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1352                              struct ieee80211_hdr *hdr);
1353 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1354                              struct ieee80211_hdr *hdr, bool ack);
1355 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1356
1357 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1358                                      enum queue_stop_reason reason);
1359 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1360                                      enum queue_stop_reason reason);
1361 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1362                                     enum queue_stop_reason reason);
1363 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1364                                     enum queue_stop_reason reason);
1365 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1366                                struct sk_buff *skb);
1367 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1368                                struct sk_buff_head *skbs);
1369 int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1370                                   struct sk_buff_head *skbs,
1371                                   void (*fn)(void *data), void *data);
1372
1373 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1374                          u16 transaction, u16 auth_alg,
1375                          u8 *extra, size_t extra_len, const u8 *bssid,
1376                          const u8 *key, u8 key_len, u8 key_idx);
1377 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1378                              const u8 *ie, size_t ie_len,
1379                              enum ieee80211_band band, u32 rate_mask,
1380                              u8 channel);
1381 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1382                                           u8 *dst, u32 ratemask,
1383                                           const u8 *ssid, size_t ssid_len,
1384                                           const u8 *ie, size_t ie_len,
1385                                           bool directed);
1386 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1387                               const u8 *ssid, size_t ssid_len,
1388                               const u8 *ie, size_t ie_len,
1389                               u32 ratemask, bool directed);
1390
1391 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1392                                   const size_t supp_rates_len,
1393                                   const u8 *supp_rates);
1394 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1395                             struct ieee802_11_elems *elems,
1396                             enum ieee80211_band band);
1397 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1398                              enum ieee80211_smps_mode smps_mode);
1399 void ieee80211_recalc_smps(struct ieee80211_local *local);
1400
1401 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1402                           const u8 *ids, int n_ids, size_t offset);
1403 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1404
1405 /* internal work items */
1406 void ieee80211_work_init(struct ieee80211_local *local);
1407 void ieee80211_add_work(struct ieee80211_work *wk);
1408 void free_work(struct ieee80211_work *wk);
1409 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1410 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1411                                            struct sk_buff *skb);
1412 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1413                                    struct ieee80211_channel *chan,
1414                                    enum nl80211_channel_type channel_type,
1415                                    unsigned int duration, u64 *cookie);
1416 int ieee80211_wk_cancel_remain_on_channel(
1417         struct ieee80211_sub_if_data *sdata, u64 cookie);
1418
1419 /* channel management */
1420 enum ieee80211_chan_mode {
1421         CHAN_MODE_UNDEFINED,
1422         CHAN_MODE_HOPPING,
1423         CHAN_MODE_FIXED,
1424 };
1425
1426 enum ieee80211_chan_mode
1427 ieee80211_get_channel_mode(struct ieee80211_local *local,
1428                            struct ieee80211_sub_if_data *ignore);
1429 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1430                                 struct ieee80211_sub_if_data *sdata,
1431                                 enum nl80211_channel_type chantype);
1432
1433 #ifdef CONFIG_MAC80211_NOINLINE
1434 #define debug_noinline noinline
1435 #else
1436 #define debug_noinline
1437 #endif
1438
1439 #endif /* IEEE80211_I_H */