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