linux/net/mac80211/ieee80211_i.h
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   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 <linux/idr.h>
  28#include <net/ieee80211_radiotap.h>
  29#include <net/cfg80211.h>
  30#include <net/mac80211.h>
  31#include "key.h"
  32#include "sta_info.h"
  33
  34struct ieee80211_local;
  35
  36/* Maximum number of broadcast/multicast frames to buffer when some of the
  37 * associated stations are using power saving. */
  38#define AP_MAX_BC_BUFFER 128
  39
  40/* Maximum number of frames buffered to all STAs, including multicast frames.
  41 * Note: increasing this limit increases the potential memory requirement. Each
  42 * frame can be up to about 2 kB long. */
  43#define TOTAL_MAX_TX_BUFFER 512
  44
  45/* Required encryption head and tailroom */
  46#define IEEE80211_ENCRYPT_HEADROOM 8
  47#define IEEE80211_ENCRYPT_TAILROOM 18
  48
  49/* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  50 * reception of at least three fragmented frames. This limit can be increased
  51 * by changing this define, at the cost of slower frame reassembly and
  52 * increased memory use (about 2 kB of RAM per entry). */
  53#define IEEE80211_FRAGMENT_MAX 4
  54
  55#define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  56
  57#define IEEE80211_DEFAULT_UAPSD_QUEUES \
  58        (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK |   \
  59         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE |   \
  60         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI |   \
  61         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
  62
  63#define IEEE80211_DEFAULT_MAX_SP_LEN            \
  64        IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  65
  66struct ieee80211_fragment_entry {
  67        unsigned long first_frag_time;
  68        unsigned int seq;
  69        unsigned int rx_queue;
  70        unsigned int last_frag;
  71        unsigned int extra_len;
  72        struct sk_buff_head skb_list;
  73        int ccmp; /* Whether fragments were encrypted with CCMP */
  74        u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  75};
  76
  77
  78struct ieee80211_bss {
  79        /* don't want to look up all the time */
  80        size_t ssid_len;
  81        u8 ssid[IEEE80211_MAX_SSID_LEN];
  82
  83        u8 dtim_period;
  84
  85        bool wmm_used;
  86        bool uapsd_supported;
  87
  88        unsigned long last_probe_resp;
  89
  90#ifdef CONFIG_MAC80211_MESH
  91        u8 *mesh_id;
  92        size_t mesh_id_len;
  93        u8 *mesh_cfg;
  94#endif
  95
  96#define IEEE80211_MAX_SUPP_RATES 32
  97        u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  98        size_t supp_rates_len;
  99
 100        /*
 101         * During association, we save an ERP value from a probe response so
 102         * that we can feed ERP info to the driver when handling the
 103         * association completes. these fields probably won't be up-to-date
 104         * otherwise, you probably don't want to use them.
 105         */
 106        bool has_erp_value;
 107        u8 erp_value;
 108};
 109
 110static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 111{
 112#ifdef CONFIG_MAC80211_MESH
 113        return bss->mesh_cfg;
 114#endif
 115        return NULL;
 116}
 117
 118static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 119{
 120#ifdef CONFIG_MAC80211_MESH
 121        return bss->mesh_id;
 122#endif
 123        return NULL;
 124}
 125
 126static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 127{
 128#ifdef CONFIG_MAC80211_MESH
 129        return bss->mesh_id_len;
 130#endif
 131        return 0;
 132}
 133
 134
 135typedef unsigned __bitwise__ ieee80211_tx_result;
 136#define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 137#define TX_DROP         ((__force ieee80211_tx_result) 1u)
 138#define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 139
 140#define IEEE80211_TX_UNICAST            BIT(1)
 141#define IEEE80211_TX_PS_BUFFERED        BIT(2)
 142
 143struct ieee80211_tx_data {
 144        struct sk_buff *skb;
 145        struct sk_buff_head skbs;
 146        struct ieee80211_local *local;
 147        struct ieee80211_sub_if_data *sdata;
 148        struct sta_info *sta;
 149        struct ieee80211_key *key;
 150
 151        struct ieee80211_channel *channel;
 152
 153        unsigned int flags;
 154};
 155
 156
 157typedef 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 */
 176enum 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 * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 190 *      to cfg80211_report_obss_beacon().
 191 *
 192 * These flags are used across handling multiple interfaces
 193 * for a single frame.
 194 */
 195enum ieee80211_rx_flags {
 196        IEEE80211_RX_CMNTR              = BIT(0),
 197        IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 198};
 199
 200struct ieee80211_rx_data {
 201        struct sk_buff *skb;
 202        struct ieee80211_local *local;
 203        struct ieee80211_sub_if_data *sdata;
 204        struct sta_info *sta;
 205        struct ieee80211_key *key;
 206
 207        unsigned int flags;
 208
 209        /*
 210         * Index into sequence numbers array, 0..16
 211         * since the last (16) is used for non-QoS,
 212         * will be 16 on non-QoS frames.
 213         */
 214        int seqno_idx;
 215
 216        /*
 217         * Index into the security IV/PN arrays, 0..16
 218         * since the last (16) is used for CCMP-encrypted
 219         * management frames, will be set to 16 on mgmt
 220         * frames and 0 on non-QoS frames.
 221         */
 222        int security_idx;
 223
 224        u32 tkip_iv32;
 225        u16 tkip_iv16;
 226};
 227
 228struct beacon_data {
 229        u8 *head, *tail;
 230        int head_len, tail_len;
 231        int dtim_period;
 232};
 233
 234struct ieee80211_if_ap {
 235        struct beacon_data __rcu *beacon;
 236        struct sk_buff __rcu *probe_resp;
 237
 238        struct list_head vlans;
 239
 240        /* yes, this looks ugly, but guarantees that we can later use
 241         * bitmap_empty :)
 242         * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 243        u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 244        struct sk_buff_head ps_bc_buf;
 245        atomic_t num_sta_ps; /* number of stations in PS mode */
 246        atomic_t num_sta_authorized; /* number of authorized stations */
 247        int dtim_count;
 248        bool dtim_bc_mc;
 249};
 250
 251struct ieee80211_if_wds {
 252        struct sta_info *sta;
 253        u8 remote_addr[ETH_ALEN];
 254};
 255
 256struct ieee80211_if_vlan {
 257        struct list_head list;
 258
 259        /* used for all tx if the VLAN is configured to 4-addr mode */
 260        struct sta_info __rcu *sta;
 261};
 262
 263struct mesh_stats {
 264        __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 265        __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 266        __u32 fwded_frames;             /* Mesh total forwarded frames */
 267        __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 268        __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 269        __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 270        atomic_t estab_plinks;
 271};
 272
 273#define PREQ_Q_F_START          0x1
 274#define PREQ_Q_F_REFRESH        0x2
 275struct mesh_preq_queue {
 276        struct list_head list;
 277        u8 dst[ETH_ALEN];
 278        u8 flags;
 279};
 280
 281enum ieee80211_work_type {
 282        IEEE80211_WORK_ABORT,
 283        IEEE80211_WORK_DIRECT_PROBE,
 284        IEEE80211_WORK_AUTH,
 285        IEEE80211_WORK_ASSOC_BEACON_WAIT,
 286        IEEE80211_WORK_ASSOC,
 287        IEEE80211_WORK_REMAIN_ON_CHANNEL,
 288        IEEE80211_WORK_OFFCHANNEL_TX,
 289};
 290
 291/**
 292 * enum work_done_result - indicates what to do after work was done
 293 *
 294 * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
 295 * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
 296 *      should be requeued.
 297 */
 298enum work_done_result {
 299        WORK_DONE_DESTROY,
 300        WORK_DONE_REQUEUE,
 301};
 302
 303struct ieee80211_work {
 304        struct list_head list;
 305
 306        struct rcu_head rcu_head;
 307
 308        struct ieee80211_sub_if_data *sdata;
 309
 310        enum work_done_result (*done)(struct ieee80211_work *wk,
 311                                      struct sk_buff *skb);
 312
 313        struct ieee80211_channel *chan;
 314        enum nl80211_channel_type chan_type;
 315
 316        unsigned long timeout;
 317        enum ieee80211_work_type type;
 318
 319        u8 filter_ta[ETH_ALEN];
 320
 321        bool started;
 322
 323        union {
 324                struct {
 325                        int tries;
 326                        u16 algorithm, transaction;
 327                        u8 ssid[IEEE80211_MAX_SSID_LEN];
 328                        u8 ssid_len;
 329                        u8 key[WLAN_KEY_LEN_WEP104];
 330                        u8 key_len, key_idx;
 331                        bool privacy;
 332                        bool synced;
 333                } probe_auth;
 334                struct {
 335                        struct cfg80211_bss *bss;
 336                        const u8 *supp_rates;
 337                        const u8 *ht_information_ie;
 338                        enum ieee80211_smps_mode smps;
 339                        int tries;
 340                        u16 capability;
 341                        u8 prev_bssid[ETH_ALEN];
 342                        u8 ssid[IEEE80211_MAX_SSID_LEN];
 343                        u8 ssid_len;
 344                        u8 supp_rates_len;
 345                        bool wmm_used, use_11n, uapsd_used;
 346                        bool synced;
 347                } assoc;
 348                struct {
 349                        u32 duration;
 350                } remain;
 351                struct {
 352                        struct sk_buff *frame;
 353                        u32 wait;
 354                        bool status;
 355                } offchan_tx;
 356        };
 357
 358        int ie_len;
 359        /* must be last */
 360        u8 ie[0];
 361};
 362
 363/* flags used in struct ieee80211_if_managed.flags */
 364enum ieee80211_sta_flags {
 365        IEEE80211_STA_BEACON_POLL       = BIT(0),
 366        IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 367        IEEE80211_STA_CONTROL_PORT      = BIT(2),
 368        IEEE80211_STA_DISABLE_11N       = BIT(4),
 369        IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 370        IEEE80211_STA_MFP_ENABLED       = BIT(6),
 371        IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 372        IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 373        IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 374};
 375
 376struct ieee80211_if_managed {
 377        struct timer_list timer;
 378        struct timer_list conn_mon_timer;
 379        struct timer_list bcn_mon_timer;
 380        struct timer_list chswitch_timer;
 381        struct work_struct monitor_work;
 382        struct work_struct chswitch_work;
 383        struct work_struct beacon_connection_loss_work;
 384
 385        unsigned long beacon_timeout;
 386        unsigned long probe_timeout;
 387        int probe_send_count;
 388        bool nullfunc_failed;
 389
 390        struct mutex mtx;
 391        struct cfg80211_bss *associated;
 392
 393        u8 bssid[ETH_ALEN];
 394
 395        u16 aid;
 396
 397        unsigned long timers_running; /* used for quiesce/restart */
 398        bool powersave; /* powersave requested for this iface */
 399        bool broken_ap; /* AP is broken -- turn off powersave */
 400        enum ieee80211_smps_mode req_smps, /* requested smps mode */
 401                                 ap_smps, /* smps mode AP thinks we're in */
 402                                 driver_smps_mode; /* smps mode request */
 403
 404        struct work_struct request_smps_work;
 405
 406        unsigned int flags;
 407
 408        bool beacon_crc_valid;
 409        u32 beacon_crc;
 410
 411        enum {
 412                IEEE80211_MFP_DISABLED,
 413                IEEE80211_MFP_OPTIONAL,
 414                IEEE80211_MFP_REQUIRED
 415        } mfp; /* management frame protection */
 416
 417        int wmm_last_param_set;
 418
 419        u8 use_4addr;
 420
 421        /* Signal strength from the last Beacon frame in the current BSS. */
 422        int last_beacon_signal;
 423
 424        /*
 425         * Weighted average of the signal strength from Beacon frames in the
 426         * current BSS. This is in units of 1/16 of the signal unit to maintain
 427         * accuracy and to speed up calculations, i.e., the value need to be
 428         * divided by 16 to get the actual value.
 429         */
 430        int ave_beacon_signal;
 431
 432        /*
 433         * Number of Beacon frames used in ave_beacon_signal. This can be used
 434         * to avoid generating less reliable cqm events that would be based
 435         * only on couple of received frames.
 436         */
 437        unsigned int count_beacon_signal;
 438
 439        /*
 440         * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 441         * that triggered a cqm event. 0 indicates that no event has been
 442         * generated for the current association.
 443         */
 444        int last_cqm_event_signal;
 445
 446        /*
 447         * State variables for keeping track of RSSI of the AP currently
 448         * connected to and informing driver when RSSI has gone
 449         * below/above a certain threshold.
 450         */
 451        int rssi_min_thold, rssi_max_thold;
 452        int last_ave_beacon_signal;
 453
 454        struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 455        struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 456};
 457
 458struct ieee80211_if_ibss {
 459        struct timer_list timer;
 460
 461        struct mutex mtx;
 462
 463        unsigned long last_scan_completed;
 464
 465        u32 basic_rates;
 466
 467        bool timer_running;
 468
 469        bool fixed_bssid;
 470        bool fixed_channel;
 471        bool privacy;
 472
 473        u8 bssid[ETH_ALEN];
 474        u8 ssid[IEEE80211_MAX_SSID_LEN];
 475        u8 ssid_len, ie_len;
 476        u8 *ie;
 477        struct ieee80211_channel *channel;
 478        enum nl80211_channel_type channel_type;
 479
 480        unsigned long ibss_join_req;
 481        /* probe response/beacon for IBSS */
 482        struct sk_buff __rcu *presp;
 483        struct sk_buff *skb;
 484
 485        spinlock_t incomplete_lock;
 486        struct list_head incomplete_stations;
 487
 488        enum {
 489                IEEE80211_IBSS_MLME_SEARCH,
 490                IEEE80211_IBSS_MLME_JOINED,
 491        } state;
 492};
 493
 494struct ieee80211_if_mesh {
 495        struct timer_list housekeeping_timer;
 496        struct timer_list mesh_path_timer;
 497        struct timer_list mesh_path_root_timer;
 498
 499        unsigned long timers_running;
 500
 501        unsigned long wrkq_flags;
 502
 503        u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 504        size_t mesh_id_len;
 505        /* Active Path Selection Protocol Identifier */
 506        u8 mesh_pp_id;
 507        /* Active Path Selection Metric Identifier */
 508        u8 mesh_pm_id;
 509        /* Congestion Control Mode Identifier */
 510        u8 mesh_cc_id;
 511        /* Synchronization Protocol Identifier */
 512        u8 mesh_sp_id;
 513        /* Authentication Protocol Identifier */
 514        u8 mesh_auth_id;
 515        /* Local mesh Sequence Number */
 516        u32 sn;
 517        /* Last used PREQ ID */
 518        u32 preq_id;
 519        atomic_t mpaths;
 520        /* Timestamp of last SN update */
 521        unsigned long last_sn_update;
 522        /* Time when it's ok to send next PERR */
 523        unsigned long next_perr;
 524        /* Timestamp of last PREQ sent */
 525        unsigned long last_preq;
 526        struct mesh_rmc *rmc;
 527        spinlock_t mesh_preq_queue_lock;
 528        struct mesh_preq_queue preq_queue;
 529        int preq_queue_len;
 530        struct mesh_stats mshstats;
 531        struct mesh_config mshcfg;
 532        u32 mesh_seqnum;
 533        bool accepting_plinks;
 534        int num_gates;
 535        const u8 *ie;
 536        u8 ie_len;
 537        enum {
 538                IEEE80211_MESH_SEC_NONE = 0x0,
 539                IEEE80211_MESH_SEC_AUTHED = 0x1,
 540                IEEE80211_MESH_SEC_SECURED = 0x2,
 541        } security;
 542};
 543
 544#ifdef CONFIG_MAC80211_MESH
 545#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 546        do { (msh)->mshstats.name++; } while (0)
 547#else
 548#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 549        do { } while (0)
 550#endif
 551
 552/**
 553 * enum ieee80211_sub_if_data_flags - virtual interface flags
 554 *
 555 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 556 * @IEEE80211_SDATA_PROMISC: interface is promisc
 557 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 558 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 559 *      associated stations and deliver multicast frames both
 560 *      back to wireless media and to the local net stack.
 561 * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 562 * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 563 */
 564enum ieee80211_sub_if_data_flags {
 565        IEEE80211_SDATA_ALLMULTI                = BIT(0),
 566        IEEE80211_SDATA_PROMISC                 = BIT(1),
 567        IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 568        IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 569        IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 570        IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 571};
 572
 573/**
 574 * enum ieee80211_sdata_state_bits - virtual interface state bits
 575 * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 576 *      mirrors netif_running() but is separate for interface type
 577 *      change handling while the interface is up
 578 * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 579 *      mode, so queues are stopped
 580 */
 581enum ieee80211_sdata_state_bits {
 582        SDATA_STATE_RUNNING,
 583        SDATA_STATE_OFFCHANNEL,
 584};
 585
 586struct ieee80211_sub_if_data {
 587        struct list_head list;
 588
 589        struct wireless_dev wdev;
 590
 591        /* keys */
 592        struct list_head key_list;
 593
 594        /* count for keys needing tailroom space allocation */
 595        int crypto_tx_tailroom_needed_cnt;
 596
 597        struct net_device *dev;
 598        struct ieee80211_local *local;
 599
 600        unsigned int flags;
 601
 602        unsigned long state;
 603
 604        int drop_unencrypted;
 605
 606        char name[IFNAMSIZ];
 607
 608        /*
 609         * keep track of whether the HT opmode (stored in
 610         * vif.bss_info.ht_operation_mode) is valid.
 611         */
 612        bool ht_opmode_valid;
 613
 614        /* to detect idle changes */
 615        bool old_idle;
 616
 617        /* Fragment table for host-based reassembly */
 618        struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 619        unsigned int fragment_next;
 620
 621        /* TID bitmap for NoAck policy */
 622        u16 noack_map;
 623
 624        struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 625        struct ieee80211_key __rcu *default_unicast_key;
 626        struct ieee80211_key __rcu *default_multicast_key;
 627        struct ieee80211_key __rcu *default_mgmt_key;
 628
 629        u16 sequence_number;
 630        __be16 control_port_protocol;
 631        bool control_port_no_encrypt;
 632
 633        struct ieee80211_tx_queue_params tx_conf[IEEE80211_MAX_QUEUES];
 634
 635        struct work_struct work;
 636        struct sk_buff_head skb_queue;
 637
 638        bool arp_filter_state;
 639
 640        /*
 641         * AP this belongs to: self in AP mode and
 642         * corresponding AP in VLAN mode, NULL for
 643         * all others (might be needed later in IBSS)
 644         */
 645        struct ieee80211_if_ap *bss;
 646
 647        /* bitmap of allowed (non-MCS) rate indexes for rate control */
 648        u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 649
 650        union {
 651                struct ieee80211_if_ap ap;
 652                struct ieee80211_if_wds wds;
 653                struct ieee80211_if_vlan vlan;
 654                struct ieee80211_if_managed mgd;
 655                struct ieee80211_if_ibss ibss;
 656                struct ieee80211_if_mesh mesh;
 657                u32 mntr_flags;
 658        } u;
 659
 660#ifdef CONFIG_MAC80211_DEBUGFS
 661        struct {
 662                struct dentry *dir;
 663                struct dentry *subdir_stations;
 664                struct dentry *default_unicast_key;
 665                struct dentry *default_multicast_key;
 666                struct dentry *default_mgmt_key;
 667        } debugfs;
 668#endif
 669        /* must be last, dynamically sized area in this! */
 670        struct ieee80211_vif vif;
 671};
 672
 673static inline
 674struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 675{
 676        return container_of(p, struct ieee80211_sub_if_data, vif);
 677}
 678
 679enum sdata_queue_type {
 680        IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 681        IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 682        IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 683};
 684
 685enum {
 686        IEEE80211_RX_MSG        = 1,
 687        IEEE80211_TX_STATUS_MSG = 2,
 688        IEEE80211_EOSP_MSG      = 3,
 689};
 690
 691struct skb_eosp_msg_data {
 692        u8 sta[ETH_ALEN], iface[ETH_ALEN];
 693};
 694
 695enum queue_stop_reason {
 696        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 697        IEEE80211_QUEUE_STOP_REASON_PS,
 698        IEEE80211_QUEUE_STOP_REASON_CSA,
 699        IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 700        IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 701        IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 702        IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE,
 703};
 704
 705#ifdef CONFIG_MAC80211_LEDS
 706struct tpt_led_trigger {
 707        struct led_trigger trig;
 708        char name[32];
 709        const struct ieee80211_tpt_blink *blink_table;
 710        unsigned int blink_table_len;
 711        struct timer_list timer;
 712        unsigned long prev_traffic;
 713        unsigned long tx_bytes, rx_bytes;
 714        unsigned int active, want;
 715        bool running;
 716};
 717#endif
 718
 719/**
 720 * mac80211 scan flags - currently active scan mode
 721 *
 722 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 723 *      well be on the operating channel
 724 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 725 *      determine if we are on the operating channel or not
 726 * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 727 *      that the scan completed.
 728 * @SCAN_ABORTED: Set for our scan work function when the driver reported
 729 *      a scan complete for an aborted scan.
 730 */
 731enum {
 732        SCAN_SW_SCANNING,
 733        SCAN_HW_SCANNING,
 734        SCAN_COMPLETED,
 735        SCAN_ABORTED,
 736};
 737
 738/**
 739 * enum mac80211_scan_state - scan state machine states
 740 *
 741 * @SCAN_DECISION: Main entry point to the scan state machine, this state
 742 *      determines if we should keep on scanning or switch back to the
 743 *      operating channel
 744 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 745 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 746 * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
 747 *      send out data
 748 * @SCAN_RESUME: Resume the scan and scan the next channel
 749 */
 750enum mac80211_scan_state {
 751        SCAN_DECISION,
 752        SCAN_SET_CHANNEL,
 753        SCAN_SEND_PROBE,
 754        SCAN_SUSPEND,
 755        SCAN_RESUME,
 756};
 757
 758struct ieee80211_local {
 759        /* embed the driver visible part.
 760         * don't cast (use the static inlines below), but we keep
 761         * it first anyway so they become a no-op */
 762        struct ieee80211_hw hw;
 763
 764        const struct ieee80211_ops *ops;
 765
 766        /*
 767         * work stuff, potentially off-channel (in the future)
 768         */
 769        struct list_head work_list;
 770        struct timer_list work_timer;
 771        struct work_struct work_work;
 772        struct sk_buff_head work_skb_queue;
 773
 774        /*
 775         * private workqueue to mac80211. mac80211 makes this accessible
 776         * via ieee80211_queue_work()
 777         */
 778        struct workqueue_struct *workqueue;
 779
 780        unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 781        /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 782        spinlock_t queue_stop_reason_lock;
 783
 784        int open_count;
 785        int monitors, cooked_mntrs;
 786        /* number of interfaces with corresponding FIF_ flags */
 787        int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 788            fif_probe_req;
 789        int probe_req_reg;
 790        unsigned int filter_flags; /* FIF_* */
 791
 792        bool wiphy_ciphers_allocated;
 793
 794        /* protects the aggregated multicast list and filter calls */
 795        spinlock_t filter_lock;
 796
 797        /* used for uploading changed mc list */
 798        struct work_struct reconfig_filter;
 799
 800        /* used to reconfigure hardware SM PS */
 801        struct work_struct recalc_smps;
 802
 803        /* aggregated multicast list */
 804        struct netdev_hw_addr_list mc_list;
 805
 806        bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 807
 808        /*
 809         * suspended is true if we finished all the suspend _and_ we have
 810         * not yet come up from resume. This is to be used by mac80211
 811         * to ensure driver sanity during suspend and mac80211's own
 812         * sanity. It can eventually be used for WoW as well.
 813         */
 814        bool suspended;
 815
 816        /*
 817         * Resuming is true while suspended, but when we're reprogramming the
 818         * hardware -- at that time it's allowed to use ieee80211_queue_work()
 819         * again even though some other parts of the stack are still suspended
 820         * and we still drop received frames to avoid waking the stack.
 821         */
 822        bool resuming;
 823
 824        /*
 825         * quiescing is true during the suspend process _only_ to
 826         * ease timer cancelling etc.
 827         */
 828        bool quiescing;
 829
 830        /* device is started */
 831        bool started;
 832
 833        /* wowlan is enabled -- don't reconfig on resume */
 834        bool wowlan;
 835
 836        int tx_headroom; /* required headroom for hardware/radiotap */
 837
 838        /* Tasklet and skb queue to process calls from IRQ mode. All frames
 839         * added to skb_queue will be processed, but frames in
 840         * skb_queue_unreliable may be dropped if the total length of these
 841         * queues increases over the limit. */
 842#define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 843        struct tasklet_struct tasklet;
 844        struct sk_buff_head skb_queue;
 845        struct sk_buff_head skb_queue_unreliable;
 846
 847        /*
 848         * Internal FIFO queue which is shared between multiple rx path
 849         * stages. Its main task is to provide a serialization mechanism,
 850         * so all rx handlers can enjoy having exclusive access to their
 851         * private data structures.
 852         */
 853        struct sk_buff_head rx_skb_queue;
 854        bool running_rx_handler;        /* protected by rx_skb_queue.lock */
 855
 856        /* Station data */
 857        /*
 858         * The mutex only protects the list, hash table and
 859         * counter, reads are done with RCU.
 860         */
 861        struct mutex sta_mtx;
 862        spinlock_t tim_lock;
 863        unsigned long num_sta;
 864        struct list_head sta_list;
 865        struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
 866        struct timer_list sta_cleanup;
 867        int sta_generation;
 868
 869        struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 870        struct tasklet_struct tx_pending_tasklet;
 871
 872        atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 873
 874        /* number of interfaces with corresponding IFF_ flags */
 875        atomic_t iff_allmultis, iff_promiscs;
 876
 877        struct rate_control_ref *rate_ctrl;
 878
 879        struct crypto_cipher *wep_tx_tfm;
 880        struct crypto_cipher *wep_rx_tfm;
 881        u32 wep_iv;
 882
 883        /* see iface.c */
 884        struct list_head interfaces;
 885        struct mutex iflist_mtx;
 886
 887        /*
 888         * Key mutex, protects sdata's key_list and sta_info's
 889         * key pointers (write access, they're RCU.)
 890         */
 891        struct mutex key_mtx;
 892
 893        /* mutex for scan and work locking */
 894        struct mutex mtx;
 895
 896        /* Scanning and BSS list */
 897        unsigned long scanning;
 898        struct cfg80211_ssid scan_ssid;
 899        struct cfg80211_scan_request *int_scan_req;
 900        struct cfg80211_scan_request *scan_req, *hw_scan_req;
 901        struct ieee80211_channel *scan_channel;
 902        enum ieee80211_band hw_scan_band;
 903        int scan_channel_idx;
 904        int scan_ies_len;
 905
 906        bool sched_scanning;
 907        struct ieee80211_sched_scan_ies sched_scan_ies;
 908        struct work_struct sched_scan_stopped_work;
 909
 910        unsigned long leave_oper_channel_time;
 911        enum mac80211_scan_state next_scan_state;
 912        struct delayed_work scan_work;
 913        struct ieee80211_sub_if_data *scan_sdata;
 914        enum nl80211_channel_type _oper_channel_type;
 915        struct ieee80211_channel *oper_channel, *csa_channel;
 916
 917        /* Temporary remain-on-channel for off-channel operations */
 918        struct ieee80211_channel *tmp_channel;
 919        enum nl80211_channel_type tmp_channel_type;
 920
 921        /* SNMP counters */
 922        /* dot11CountersTable */
 923        u32 dot11TransmittedFragmentCount;
 924        u32 dot11MulticastTransmittedFrameCount;
 925        u32 dot11FailedCount;
 926        u32 dot11RetryCount;
 927        u32 dot11MultipleRetryCount;
 928        u32 dot11FrameDuplicateCount;
 929        u32 dot11ReceivedFragmentCount;
 930        u32 dot11MulticastReceivedFrameCount;
 931        u32 dot11TransmittedFrameCount;
 932
 933#ifdef CONFIG_MAC80211_LEDS
 934        int tx_led_counter, rx_led_counter;
 935        struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 936        struct tpt_led_trigger *tpt_led_trigger;
 937        char tx_led_name[32], rx_led_name[32],
 938             assoc_led_name[32], radio_led_name[32];
 939#endif
 940
 941#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 942        /* TX/RX handler statistics */
 943        unsigned int tx_handlers_drop;
 944        unsigned int tx_handlers_queued;
 945        unsigned int tx_handlers_drop_unencrypted;
 946        unsigned int tx_handlers_drop_fragment;
 947        unsigned int tx_handlers_drop_wep;
 948        unsigned int tx_handlers_drop_not_assoc;
 949        unsigned int tx_handlers_drop_unauth_port;
 950        unsigned int rx_handlers_drop;
 951        unsigned int rx_handlers_queued;
 952        unsigned int rx_handlers_drop_nullfunc;
 953        unsigned int rx_handlers_drop_defrag;
 954        unsigned int rx_handlers_drop_short;
 955        unsigned int rx_handlers_drop_passive_scan;
 956        unsigned int tx_expand_skb_head;
 957        unsigned int tx_expand_skb_head_cloned;
 958        unsigned int rx_expand_skb_head;
 959        unsigned int rx_expand_skb_head2;
 960        unsigned int rx_handlers_fragments;
 961        unsigned int tx_status_drop;
 962#define I802_DEBUG_INC(c) (c)++
 963#else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 964#define I802_DEBUG_INC(c) do { } while (0)
 965#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 966
 967
 968        int total_ps_buffered; /* total number of all buffered unicast and
 969                                * multicast packets for power saving stations
 970                                */
 971        unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 972
 973        /*
 974         * Bitmask of enabled u-apsd queues,
 975         * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 976         * to take effect.
 977         */
 978        unsigned int uapsd_queues;
 979
 980        /*
 981         * Maximum number of buffered frames AP can deliver during a
 982         * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 983         * Needs a new association to take effect.
 984         */
 985        unsigned int uapsd_max_sp_len;
 986
 987        bool pspolling;
 988        bool offchannel_ps_enabled;
 989        /*
 990         * PS can only be enabled when we have exactly one managed
 991         * interface (and monitors) in PS, this then points there.
 992         */
 993        struct ieee80211_sub_if_data *ps_sdata;
 994        struct work_struct dynamic_ps_enable_work;
 995        struct work_struct dynamic_ps_disable_work;
 996        struct timer_list dynamic_ps_timer;
 997        struct notifier_block network_latency_notifier;
 998        struct notifier_block ifa_notifier;
 999
1000        /*
1001         * The dynamic ps timeout configured from user space via WEXT -
1002         * this will override whatever chosen by mac80211 internally.
1003         */
1004        int dynamic_ps_forced_timeout;
1005        int dynamic_ps_user_timeout;
1006        bool disable_dynamic_ps;
1007
1008        int user_power_level; /* in dBm */
1009        int power_constr_level; /* in dBm */
1010
1011        enum ieee80211_smps_mode smps_mode;
1012
1013        struct work_struct restart_work;
1014
1015#ifdef CONFIG_MAC80211_DEBUGFS
1016        struct local_debugfsdentries {
1017                struct dentry *rcdir;
1018                struct dentry *keys;
1019        } debugfs;
1020#endif
1021
1022        struct ieee80211_channel *hw_roc_channel;
1023        struct net_device *hw_roc_dev;
1024        struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
1025        struct work_struct hw_roc_start, hw_roc_done;
1026        enum nl80211_channel_type hw_roc_channel_type;
1027        unsigned int hw_roc_duration;
1028        u32 hw_roc_cookie;
1029        bool hw_roc_for_tx;
1030
1031        struct idr ack_status_frames;
1032        spinlock_t ack_status_lock;
1033
1034        /* dummy netdev for use w/ NAPI */
1035        struct net_device napi_dev;
1036
1037        struct napi_struct napi;
1038};
1039
1040static inline struct ieee80211_sub_if_data *
1041IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1042{
1043        return netdev_priv(dev);
1044}
1045
1046/* this struct represents 802.11n's RA/TID combination */
1047struct ieee80211_ra_tid {
1048        u8 ra[ETH_ALEN];
1049        u16 tid;
1050};
1051
1052/* Parsed Information Elements */
1053struct ieee802_11_elems {
1054        u8 *ie_start;
1055        size_t total_len;
1056
1057        /* pointers to IEs */
1058        u8 *ssid;
1059        u8 *supp_rates;
1060        u8 *fh_params;
1061        u8 *ds_params;
1062        u8 *cf_params;
1063        struct ieee80211_tim_ie *tim;
1064        u8 *ibss_params;
1065        u8 *challenge;
1066        u8 *wpa;
1067        u8 *rsn;
1068        u8 *erp_info;
1069        u8 *ext_supp_rates;
1070        u8 *wmm_info;
1071        u8 *wmm_param;
1072        struct ieee80211_ht_cap *ht_cap_elem;
1073        struct ieee80211_ht_info *ht_info_elem;
1074        struct ieee80211_meshconf_ie *mesh_config;
1075        u8 *mesh_id;
1076        u8 *peering;
1077        u8 *preq;
1078        u8 *prep;
1079        u8 *perr;
1080        struct ieee80211_rann_ie *rann;
1081        u8 *ch_switch_elem;
1082        u8 *country_elem;
1083        u8 *pwr_constr_elem;
1084        u8 *quiet_elem; /* first quite element */
1085        u8 *timeout_int;
1086
1087        /* length of them, respectively */
1088        u8 ssid_len;
1089        u8 supp_rates_len;
1090        u8 fh_params_len;
1091        u8 ds_params_len;
1092        u8 cf_params_len;
1093        u8 tim_len;
1094        u8 ibss_params_len;
1095        u8 challenge_len;
1096        u8 wpa_len;
1097        u8 rsn_len;
1098        u8 erp_info_len;
1099        u8 ext_supp_rates_len;
1100        u8 wmm_info_len;
1101        u8 wmm_param_len;
1102        u8 mesh_id_len;
1103        u8 peering_len;
1104        u8 preq_len;
1105        u8 prep_len;
1106        u8 perr_len;
1107        u8 ch_switch_elem_len;
1108        u8 country_elem_len;
1109        u8 pwr_constr_elem_len;
1110        u8 quiet_elem_len;
1111        u8 num_of_quiet_elem;   /* can be more the one */
1112        u8 timeout_int_len;
1113};
1114
1115static inline struct ieee80211_local *hw_to_local(
1116        struct ieee80211_hw *hw)
1117{
1118        return container_of(hw, struct ieee80211_local, hw);
1119}
1120
1121static inline struct ieee80211_hw *local_to_hw(
1122        struct ieee80211_local *local)
1123{
1124        return &local->hw;
1125}
1126
1127
1128static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1129{
1130        return compare_ether_addr(raddr, addr) == 0 ||
1131               is_broadcast_ether_addr(raddr);
1132}
1133
1134
1135int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1136void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1137void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1138                                      u32 changed);
1139void ieee80211_configure_filter(struct ieee80211_local *local);
1140u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1141
1142/* STA code */
1143void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1144int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1145                       struct cfg80211_auth_request *req);
1146int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1147                        struct cfg80211_assoc_request *req);
1148int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1149                         struct cfg80211_deauth_request *req,
1150                         void *cookie);
1151int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1152                           struct cfg80211_disassoc_request *req,
1153                           void *cookie);
1154void ieee80211_send_pspoll(struct ieee80211_local *local,
1155                           struct ieee80211_sub_if_data *sdata);
1156void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1157int ieee80211_max_network_latency(struct notifier_block *nb,
1158                                  unsigned long data, void *dummy);
1159int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1160void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1161                                      struct ieee80211_channel_sw_ie *sw_elem,
1162                                      struct ieee80211_bss *bss,
1163                                      u64 timestamp);
1164void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1165void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1166void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1167void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1168                                  struct sk_buff *skb);
1169void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1170void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1171
1172/* IBSS code */
1173void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1174void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1175void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1176                              const u8 *bssid, const u8 *addr, u32 supp_rates);
1177int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1178                        struct cfg80211_ibss_params *params);
1179int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1180void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1181void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1182void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1183void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1184                                   struct sk_buff *skb);
1185
1186/* mesh code */
1187void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1188void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1189                                   struct sk_buff *skb);
1190
1191/* scan/BSS handling */
1192void ieee80211_scan_work(struct work_struct *work);
1193int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1194                                    const u8 *ssid, u8 ssid_len,
1195                                    struct ieee80211_channel *chan);
1196int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1197                           struct cfg80211_scan_request *req);
1198void ieee80211_scan_cancel(struct ieee80211_local *local);
1199ieee80211_rx_result
1200ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1201
1202void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1203struct ieee80211_bss *
1204ieee80211_bss_info_update(struct ieee80211_local *local,
1205                          struct ieee80211_rx_status *rx_status,
1206                          struct ieee80211_mgmt *mgmt,
1207                          size_t len,
1208                          struct ieee802_11_elems *elems,
1209                          struct ieee80211_channel *channel,
1210                          bool beacon);
1211struct ieee80211_bss *
1212ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1213                     u8 *ssid, u8 ssid_len);
1214void ieee80211_rx_bss_put(struct ieee80211_local *local,
1215                          struct ieee80211_bss *bss);
1216
1217/* scheduled scan handling */
1218int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1219                                       struct cfg80211_sched_scan_request *req);
1220int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1221void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1222
1223/* off-channel helpers */
1224void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1225                                    bool offchannel_ps_enable);
1226void ieee80211_offchannel_return(struct ieee80211_local *local,
1227                                 bool offchannel_ps_disable);
1228void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1229
1230/* interface handling */
1231int ieee80211_iface_init(void);
1232void ieee80211_iface_exit(void);
1233int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1234                     struct net_device **new_dev, enum nl80211_iftype type,
1235                     struct vif_params *params);
1236int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1237                             enum nl80211_iftype type);
1238void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1239void ieee80211_remove_interfaces(struct ieee80211_local *local);
1240u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1241void ieee80211_recalc_idle(struct ieee80211_local *local);
1242void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1243                                    const int offset);
1244
1245static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1246{
1247        return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1248}
1249
1250/* tx handling */
1251void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1252void ieee80211_tx_pending(unsigned long data);
1253netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1254                                         struct net_device *dev);
1255netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1256                                       struct net_device *dev);
1257
1258/* HT */
1259bool ieee80111_cfg_override_disables_ht40(struct ieee80211_sub_if_data *sdata);
1260void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1261                                     struct ieee80211_sta_ht_cap *ht_cap);
1262void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1263                                       struct ieee80211_supported_band *sband,
1264                                       struct ieee80211_ht_cap *ht_cap_ie,
1265                                       struct ieee80211_sta_ht_cap *ht_cap);
1266void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1267                          const u8 *da, u16 tid,
1268                          u16 initiator, u16 reason_code);
1269int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1270                               enum ieee80211_smps_mode smps, const u8 *da,
1271                               const u8 *bssid);
1272void ieee80211_request_smps_work(struct work_struct *work);
1273
1274void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1275                                     u16 initiator, u16 reason, bool stop);
1276void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1277                                    u16 initiator, u16 reason, bool stop);
1278void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1279void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1280                             struct sta_info *sta,
1281                             struct ieee80211_mgmt *mgmt, size_t len);
1282void ieee80211_process_addba_resp(struct ieee80211_local *local,
1283                                  struct sta_info *sta,
1284                                  struct ieee80211_mgmt *mgmt,
1285                                  size_t len);
1286void ieee80211_process_addba_request(struct ieee80211_local *local,
1287                                     struct sta_info *sta,
1288                                     struct ieee80211_mgmt *mgmt,
1289                                     size_t len);
1290
1291int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1292                                   enum ieee80211_back_parties initiator,
1293                                   bool tx);
1294int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1295                                    enum ieee80211_back_parties initiator,
1296                                    bool tx);
1297void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1298void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1299void ieee80211_ba_session_work(struct work_struct *work);
1300void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1301void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1302
1303/* Spectrum management */
1304void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1305                                       struct ieee80211_mgmt *mgmt,
1306                                       size_t len);
1307
1308/* Suspend/resume and hw reconfiguration */
1309int ieee80211_reconfig(struct ieee80211_local *local);
1310void ieee80211_stop_device(struct ieee80211_local *local);
1311
1312#ifdef CONFIG_PM
1313int __ieee80211_suspend(struct ieee80211_hw *hw,
1314                        struct cfg80211_wowlan *wowlan);
1315
1316static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1317{
1318        struct ieee80211_local *local = hw_to_local(hw);
1319
1320        WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1321                "%s: resume with hardware scan still in progress\n",
1322                wiphy_name(hw->wiphy));
1323
1324        return ieee80211_reconfig(hw_to_local(hw));
1325}
1326#else
1327static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1328                                      struct cfg80211_wowlan *wowlan)
1329{
1330        return 0;
1331}
1332
1333static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1334{
1335        return 0;
1336}
1337#endif
1338
1339/* utility functions/constants */
1340extern void *mac80211_wiphy_privid; /* for wiphy privid */
1341u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1342                        enum nl80211_iftype type);
1343int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1344                             int rate, int erp, int short_preamble);
1345void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1346                                     struct ieee80211_hdr *hdr, const u8 *tsc,
1347                                     gfp_t gfp);
1348void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1349void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1350
1351void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1352                          struct sk_buff *skb, int tid);
1353static void inline ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1354                                    struct sk_buff *skb)
1355{
1356        /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1357        ieee80211_tx_skb_tid(sdata, skb, 7);
1358}
1359
1360void ieee802_11_parse_elems(u8 *start, size_t len,
1361                            struct ieee802_11_elems *elems);
1362u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1363                               struct ieee802_11_elems *elems,
1364                               u64 filter, u32 crc);
1365u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1366                              enum ieee80211_band band);
1367
1368void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1369void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1370void ieee80211_dynamic_ps_timer(unsigned long data);
1371void ieee80211_send_nullfunc(struct ieee80211_local *local,
1372                             struct ieee80211_sub_if_data *sdata,
1373                             int powersave);
1374void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1375                             struct ieee80211_hdr *hdr);
1376void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1377                             struct ieee80211_hdr *hdr, bool ack);
1378void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1379
1380void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1381                                     enum queue_stop_reason reason);
1382void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1383                                     enum queue_stop_reason reason);
1384void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1385                                    enum queue_stop_reason reason);
1386void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1387                                    enum queue_stop_reason reason);
1388void ieee80211_add_pending_skb(struct ieee80211_local *local,
1389                               struct sk_buff *skb);
1390void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1391                                struct sk_buff_head *skbs);
1392void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1393                                   struct sk_buff_head *skbs,
1394                                   void (*fn)(void *data), void *data);
1395
1396void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1397                         u16 transaction, u16 auth_alg,
1398                         u8 *extra, size_t extra_len, const u8 *bssid,
1399                         const u8 *key, u8 key_len, u8 key_idx);
1400int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1401                             const u8 *ie, size_t ie_len,
1402                             enum ieee80211_band band, u32 rate_mask,
1403                             u8 channel);
1404struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1405                                          u8 *dst, u32 ratemask,
1406                                          const u8 *ssid, size_t ssid_len,
1407                                          const u8 *ie, size_t ie_len,
1408                                          bool directed);
1409void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1410                              const u8 *ssid, size_t ssid_len,
1411                              const u8 *ie, size_t ie_len,
1412                              u32 ratemask, bool directed, bool no_cck);
1413
1414void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1415                                  const size_t supp_rates_len,
1416                                  const u8 *supp_rates);
1417u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1418                            struct ieee802_11_elems *elems,
1419                            enum ieee80211_band band);
1420int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1421                             enum ieee80211_smps_mode smps_mode);
1422void ieee80211_recalc_smps(struct ieee80211_local *local);
1423
1424size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1425                          const u8 *ids, int n_ids, size_t offset);
1426size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1427u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1428                              u16 cap);
1429u8 *ieee80211_ie_build_ht_info(u8 *pos,
1430                                struct ieee80211_sta_ht_cap *ht_cap,
1431                                struct ieee80211_channel *channel,
1432                                enum nl80211_channel_type channel_type);
1433
1434/* internal work items */
1435void ieee80211_work_init(struct ieee80211_local *local);
1436void ieee80211_add_work(struct ieee80211_work *wk);
1437void free_work(struct ieee80211_work *wk);
1438void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1439ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1440                                           struct sk_buff *skb);
1441int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1442                                   struct ieee80211_channel *chan,
1443                                   enum nl80211_channel_type channel_type,
1444                                   unsigned int duration, u64 *cookie);
1445int ieee80211_wk_cancel_remain_on_channel(
1446        struct ieee80211_sub_if_data *sdata, u64 cookie);
1447
1448/* channel management */
1449enum ieee80211_chan_mode {
1450        CHAN_MODE_UNDEFINED,
1451        CHAN_MODE_HOPPING,
1452        CHAN_MODE_FIXED,
1453};
1454
1455enum ieee80211_chan_mode
1456ieee80211_get_channel_mode(struct ieee80211_local *local,
1457                           struct ieee80211_sub_if_data *ignore);
1458bool ieee80211_set_channel_type(struct ieee80211_local *local,
1459                                struct ieee80211_sub_if_data *sdata,
1460                                enum nl80211_channel_type chantype);
1461enum nl80211_channel_type
1462ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info);
1463
1464#ifdef CONFIG_MAC80211_NOINLINE
1465#define debug_noinline noinline
1466#else
1467#define debug_noinline
1468#endif
1469
1470#endif /* IEEE80211_I_H */
1471
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