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 <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
  34 struct 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_JIFFIES(x)        (usecs_to_jiffies((x) * 1024))
  56 #define TU_TO_EXP_TIME(x)       (jiffies + TU_TO_JIFFIES(x))
  57
  58 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
  59         (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK |   \
  60          IEEE80211_WMM_IE_STA_QOSINFO_AC_BE |   \
  61          IEEE80211_WMM_IE_STA_QOSINFO_AC_VI |   \
  62          IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
  63
  64 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  65         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  66
  67 struct ieee80211_fragment_entry {
  68         unsigned long first_frag_time;
  69         unsigned int seq;
  70         unsigned int rx_queue;
  71         unsigned int last_frag;
  72         unsigned int extra_len;
  73         struct sk_buff_head skb_list;
  74         int ccmp; /* Whether fragments were encrypted with CCMP */
  75         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  76 };
  77
  78
  79 struct ieee80211_bss {
  80         /* don't want to look up all the time */
  81         size_t ssid_len;
  82         u8 ssid[IEEE80211_MAX_SSID_LEN];
  83
  84         u8 dtim_period;
  85
  86         bool wmm_used;
  87         bool uapsd_supported;
  88
  89         unsigned long last_probe_resp;
  90
  91 #ifdef CONFIG_MAC80211_MESH
  92         u8 *mesh_id;
  93         size_t mesh_id_len;
  94         u8 *mesh_cfg;
  95 #endif
  96
  97 #define IEEE80211_MAX_SUPP_RATES 32
  98         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  99         size_t supp_rates_len;
 100
 101         /*
 102          * During association, we save an ERP value from a probe response so
 103          * that we can feed ERP info to the driver when handling the
 104          * association completes. these fields probably won't be up-to-date
 105          * otherwise, you probably don't want to use them.
 106          */
 107         bool has_erp_value;
 108         u8 erp_value;
 109
 110         /* Keep track of the corruption of the last beacon/probe response. */
 111         u8 corrupt_data;
 112
 113         /* Keep track of what bits of information we have valid info for. */
 114         u8 valid_data;
 115 };
 116
 117 /**
 118  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
 119  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
 120  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
 121  *
 122  * These are bss flags that are attached to a bss in the
 123  * @corrupt_data field of &struct ieee80211_bss.
 124  */
 125 enum ieee80211_bss_corrupt_data_flags {
 126         IEEE80211_BSS_CORRUPT_BEACON            = BIT(0),
 127         IEEE80211_BSS_CORRUPT_PROBE_RESP        = BIT(1)
 128 };
 129
 130 /**
 131  * enum ieee80211_valid_data_flags - BSS valid data flags
 132  * @IEEE80211_BSS_VALID_DTIM: DTIM data was gathered from non-corrupt IE
 133  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
 134  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
 135  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
 136  *
 137  * These are bss flags that are attached to a bss in the
 138  * @valid_data field of &struct ieee80211_bss.  They show which parts
 139  * of the data structure were recieved as a result of an un-corrupted
 140  * beacon/probe response.
 141  */
 142 enum ieee80211_bss_valid_data_flags {
 143         IEEE80211_BSS_VALID_DTIM                = BIT(0),
 144         IEEE80211_BSS_VALID_WMM                 = BIT(1),
 145         IEEE80211_BSS_VALID_RATES               = BIT(2),
 146         IEEE80211_BSS_VALID_ERP                 = BIT(3)
 147 };
 148
 149 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 150 {
 151 #ifdef CONFIG_MAC80211_MESH
 152         return bss->mesh_cfg;
 153 #endif
 154         return NULL;
 155 }
 156
 157 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 158 {
 159 #ifdef CONFIG_MAC80211_MESH
 160         return bss->mesh_id;
 161 #endif
 162         return NULL;
 163 }
 164
 165 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 166 {
 167 #ifdef CONFIG_MAC80211_MESH
 168         return bss->mesh_id_len;
 169 #endif
 170         return 0;
 171 }
 172
 173
 174 typedef unsigned __bitwise__ ieee80211_tx_result;
 175 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 176 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 177 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 178
 179 #define IEEE80211_TX_UNICAST            BIT(1)
 180 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 181
 182 struct ieee80211_tx_data {
 183         struct sk_buff *skb;
 184         struct sk_buff_head skbs;
 185         struct ieee80211_local *local;
 186         struct ieee80211_sub_if_data *sdata;
 187         struct sta_info *sta;
 188         struct ieee80211_key *key;
 189
 190         struct ieee80211_channel *channel;
 191
 192         unsigned int flags;
 193 };
 194
 195
 196 typedef unsigned __bitwise__ ieee80211_rx_result;
 197 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 198 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 199 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 200 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 201
 202 /**
 203  * enum ieee80211_packet_rx_flags - packet RX flags
 204  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
 205  *      (incl. multicast frames)
 206  * @IEEE80211_RX_IN_SCAN: received while scanning
 207  * @IEEE80211_RX_FRAGMENTED: fragmented frame
 208  * @IEEE80211_RX_AMSDU: a-MSDU packet
 209  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 210  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 211  *
 212  * These are per-frame flags that are attached to a frame in the
 213  * @rx_flags field of &struct ieee80211_rx_status.
 214  */
 215 enum ieee80211_packet_rx_flags {
 216         IEEE80211_RX_IN_SCAN                    = BIT(0),
 217         IEEE80211_RX_RA_MATCH                   = BIT(1),
 218         IEEE80211_RX_FRAGMENTED                 = BIT(2),
 219         IEEE80211_RX_AMSDU                      = BIT(3),
 220         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 221         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 222 };
 223
 224 /**
 225  * enum ieee80211_rx_flags - RX data flags
 226  *
 227  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 228  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 229  *      to cfg80211_report_obss_beacon().
 230  *
 231  * These flags are used across handling multiple interfaces
 232  * for a single frame.
 233  */
 234 enum ieee80211_rx_flags {
 235         IEEE80211_RX_CMNTR              = BIT(0),
 236         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 237 };
 238
 239 struct ieee80211_rx_data {
 240         struct sk_buff *skb;
 241         struct ieee80211_local *local;
 242         struct ieee80211_sub_if_data *sdata;
 243         struct sta_info *sta;
 244         struct ieee80211_key *key;
 245
 246         unsigned int flags;
 247
 248         /*
 249          * Index into sequence numbers array, 0..16
 250          * since the last (16) is used for non-QoS,
 251          * will be 16 on non-QoS frames.
 252          */
 253         int seqno_idx;
 254
 255         /*
 256          * Index into the security IV/PN arrays, 0..16
 257          * since the last (16) is used for CCMP-encrypted
 258          * management frames, will be set to 16 on mgmt
 259          * frames and 0 on non-QoS frames.
 260          */
 261         int security_idx;
 262
 263         u32 tkip_iv32;
 264         u16 tkip_iv16;
 265 };
 266
 267 struct beacon_data {
 268         u8 *head, *tail;
 269         int head_len, tail_len;
 270         struct rcu_head rcu_head;
 271 };
 272
 273 struct ieee80211_if_ap {
 274         struct beacon_data __rcu *beacon;
 275         struct sk_buff __rcu *probe_resp;
 276
 277         struct list_head vlans;
 278
 279         /* yes, this looks ugly, but guarantees that we can later use
 280          * bitmap_empty :)
 281          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 282         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 283         struct sk_buff_head ps_bc_buf;
 284         atomic_t num_sta_ps; /* number of stations in PS mode */
 285         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 286         int dtim_count;
 287         bool dtim_bc_mc;
 288 };
 289
 290 struct ieee80211_if_wds {
 291         struct sta_info *sta;
 292         u8 remote_addr[ETH_ALEN];
 293 };
 294
 295 struct ieee80211_if_vlan {
 296         struct list_head list;
 297
 298         /* used for all tx if the VLAN is configured to 4-addr mode */
 299         struct sta_info __rcu *sta;
 300 };
 301
 302 struct mesh_stats {
 303         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 304         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 305         __u32 fwded_frames;             /* Mesh total forwarded frames */
 306         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 307         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 308         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 309         atomic_t estab_plinks;
 310 };
 311
 312 #define PREQ_Q_F_START          0x1
 313 #define PREQ_Q_F_REFRESH        0x2
 314 struct mesh_preq_queue {
 315         struct list_head list;
 316         u8 dst[ETH_ALEN];
 317         u8 flags;
 318 };
 319
 320 #if HZ/100 == 0
 321 #define IEEE80211_ROC_MIN_LEFT  1
 322 #else
 323 #define IEEE80211_ROC_MIN_LEFT  (HZ/100)
 324 #endif
 325
 326 struct ieee80211_roc_work {
 327         struct list_head list;
 328         struct list_head dependents;
 329
 330         struct delayed_work work;
 331
 332         struct ieee80211_sub_if_data *sdata;
 333
 334         struct ieee80211_channel *chan;
 335         enum nl80211_channel_type chan_type;
 336
 337         bool started, abort, hw_begun, notified;
 338
 339         unsigned long hw_start_time;
 340
 341         u32 duration, req_duration;
 342         struct sk_buff *frame;
 343         u64 mgmt_tx_cookie;
 344 };
 345
 346 /* flags used in struct ieee80211_if_managed.flags */
 347 enum ieee80211_sta_flags {
 348         IEEE80211_STA_BEACON_POLL       = BIT(0),
 349         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 350         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 351         IEEE80211_STA_DISABLE_11N       = BIT(4),
 352         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 353         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 354         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 355         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 356         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 357         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 358 };
 359
 360 struct ieee80211_mgd_auth_data {
 361         struct cfg80211_bss *bss;
 362         unsigned long timeout;
 363         int tries;
 364         u16 algorithm, expected_transaction;
 365
 366         u8 key[WLAN_KEY_LEN_WEP104];
 367         u8 key_len, key_idx;
 368         bool done;
 369
 370         size_t ie_len;
 371         u8 ie[];
 372 };
 373
 374 struct ieee80211_mgd_assoc_data {
 375         struct cfg80211_bss *bss;
 376         const u8 *supp_rates;
 377
 378         unsigned long timeout;
 379         int tries;
 380
 381         u16 capability;
 382         u8 prev_bssid[ETH_ALEN];
 383         u8 ssid[IEEE80211_MAX_SSID_LEN];
 384         u8 ssid_len;
 385         u8 supp_rates_len;
 386         bool wmm, uapsd;
 387         bool have_beacon;
 388         bool sent_assoc;
 389         bool synced;
 390
 391         u8 ap_ht_param;
 392
 393         size_t ie_len;
 394         u8 ie[];
 395 };
 396
 397 struct ieee80211_if_managed {
 398         struct timer_list timer;
 399         struct timer_list conn_mon_timer;
 400         struct timer_list bcn_mon_timer;
 401         struct timer_list chswitch_timer;
 402         struct work_struct monitor_work;
 403         struct work_struct chswitch_work;
 404         struct work_struct beacon_connection_loss_work;
 405
 406         unsigned long beacon_timeout;
 407         unsigned long probe_timeout;
 408         int probe_send_count;
 409         bool nullfunc_failed;
 410
 411         struct mutex mtx;
 412         struct cfg80211_bss *associated;
 413         struct ieee80211_mgd_auth_data *auth_data;
 414         struct ieee80211_mgd_assoc_data *assoc_data;
 415
 416         u8 bssid[ETH_ALEN];
 417
 418         u16 aid;
 419
 420         unsigned long timers_running; /* used for quiesce/restart */
 421         bool powersave; /* powersave requested for this iface */
 422         bool broken_ap; /* AP is broken -- turn off powersave */
 423         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 424                                  ap_smps, /* smps mode AP thinks we're in */
 425                                  driver_smps_mode; /* smps mode request */
 426
 427         struct work_struct request_smps_work;
 428
 429         unsigned int flags;
 430
 431         bool beacon_crc_valid;
 432         u32 beacon_crc;
 433
 434         enum {
 435                 IEEE80211_MFP_DISABLED,
 436                 IEEE80211_MFP_OPTIONAL,
 437                 IEEE80211_MFP_REQUIRED
 438         } mfp; /* management frame protection */
 439
 440         /*
 441          * Bitmask of enabled u-apsd queues,
 442          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 443          * to take effect.
 444          */
 445         unsigned int uapsd_queues;
 446
 447         /*
 448          * Maximum number of buffered frames AP can deliver during a
 449          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 450          * Needs a new association to take effect.
 451          */
 452         unsigned int uapsd_max_sp_len;
 453
 454         int wmm_last_param_set;
 455
 456         u8 use_4addr;
 457
 458         /* Signal strength from the last Beacon frame in the current BSS. */
 459         int last_beacon_signal;
 460
 461         /*
 462          * Weighted average of the signal strength from Beacon frames in the
 463          * current BSS. This is in units of 1/16 of the signal unit to maintain
 464          * accuracy and to speed up calculations, i.e., the value need to be
 465          * divided by 16 to get the actual value.
 466          */
 467         int ave_beacon_signal;
 468
 469         /*
 470          * Number of Beacon frames used in ave_beacon_signal. This can be used
 471          * to avoid generating less reliable cqm events that would be based
 472          * only on couple of received frames.
 473          */
 474         unsigned int count_beacon_signal;
 475
 476         /*
 477          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 478          * that triggered a cqm event. 0 indicates that no event has been
 479          * generated for the current association.
 480          */
 481         int last_cqm_event_signal;
 482
 483         /*
 484          * State variables for keeping track of RSSI of the AP currently
 485          * connected to and informing driver when RSSI has gone
 486          * below/above a certain threshold.
 487          */
 488         int rssi_min_thold, rssi_max_thold;
 489         int last_ave_beacon_signal;
 490
 491         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 492         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 493 };
 494
 495 struct ieee80211_if_ibss {
 496         struct timer_list timer;
 497
 498         struct mutex mtx;
 499
 500         unsigned long last_scan_completed;
 501
 502         u32 basic_rates;
 503
 504         bool timer_running;
 505
 506         bool fixed_bssid;
 507         bool fixed_channel;
 508         bool privacy;
 509
 510         bool control_port;
 511
 512         u8 bssid[ETH_ALEN] __aligned(2);
 513         u8 ssid[IEEE80211_MAX_SSID_LEN];
 514         u8 ssid_len, ie_len;
 515         u8 *ie;
 516         struct ieee80211_channel *channel;
 517         enum nl80211_channel_type channel_type;
 518
 519         unsigned long ibss_join_req;
 520         /* probe response/beacon for IBSS */
 521         struct sk_buff __rcu *presp;
 522         struct sk_buff *skb;
 523
 524         spinlock_t incomplete_lock;
 525         struct list_head incomplete_stations;
 526
 527         enum {
 528                 IEEE80211_IBSS_MLME_SEARCH,
 529                 IEEE80211_IBSS_MLME_JOINED,
 530         } state;
 531 };
 532
 533 /**
 534  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 535  *
 536  * these declarations define the interface, which enables
 537  * vendor-specific mesh synchronization
 538  *
 539  */
 540 struct ieee802_11_elems;
 541 struct ieee80211_mesh_sync_ops {
 542         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 543                              u16 stype,
 544                              struct ieee80211_mgmt *mgmt,
 545                              struct ieee802_11_elems *elems,
 546                              struct ieee80211_rx_status *rx_status);
 547         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata);
 548         /* add other framework functions here */
 549 };
 550
 551 struct ieee80211_if_mesh {
 552         struct timer_list housekeeping_timer;
 553         struct timer_list mesh_path_timer;
 554         struct timer_list mesh_path_root_timer;
 555
 556         unsigned long timers_running;
 557
 558         unsigned long wrkq_flags;
 559
 560         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 561         size_t mesh_id_len;
 562         /* Active Path Selection Protocol Identifier */
 563         u8 mesh_pp_id;
 564         /* Active Path Selection Metric Identifier */
 565         u8 mesh_pm_id;
 566         /* Congestion Control Mode Identifier */
 567         u8 mesh_cc_id;
 568         /* Synchronization Protocol Identifier */
 569         u8 mesh_sp_id;
 570         /* Authentication Protocol Identifier */
 571         u8 mesh_auth_id;
 572         /* Local mesh Sequence Number */
 573         u32 sn;
 574         /* Last used PREQ ID */
 575         u32 preq_id;
 576         atomic_t mpaths;
 577         /* Timestamp of last SN update */
 578         unsigned long last_sn_update;
 579         /* Time when it's ok to send next PERR */
 580         unsigned long next_perr;
 581         /* Timestamp of last PREQ sent */
 582         unsigned long last_preq;
 583         struct mesh_rmc *rmc;
 584         spinlock_t mesh_preq_queue_lock;
 585         struct mesh_preq_queue preq_queue;
 586         int preq_queue_len;
 587         struct mesh_stats mshstats;
 588         struct mesh_config mshcfg;
 589         u32 mesh_seqnum;
 590         bool accepting_plinks;
 591         int num_gates;
 592         const u8 *ie;
 593         u8 ie_len;
 594         enum {
 595                 IEEE80211_MESH_SEC_NONE = 0x0,
 596                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 597                 IEEE80211_MESH_SEC_SECURED = 0x2,
 598         } security;
 599         /* Extensible Synchronization Framework */
 600         struct ieee80211_mesh_sync_ops *sync_ops;
 601         s64 sync_offset_clockdrift_max;
 602         spinlock_t sync_offset_lock;
 603         bool adjusting_tbtt;
 604 };
 605
 606 #ifdef CONFIG_MAC80211_MESH
 607 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 608         do { (msh)->mshstats.name++; } while (0)
 609 #else
 610 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 611         do { } while (0)
 612 #endif
 613
 614 /**
 615  * enum ieee80211_sub_if_data_flags - virtual interface flags
 616  *
 617  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 618  * @IEEE80211_SDATA_PROMISC: interface is promisc
 619  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 620  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 621  *      associated stations and deliver multicast frames both
 622  *      back to wireless media and to the local net stack.
 623  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 624  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 625  */
 626 enum ieee80211_sub_if_data_flags {
 627         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 628         IEEE80211_SDATA_PROMISC                 = BIT(1),
 629         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 630         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 631         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 632         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 633 };
 634
 635 /**
 636  * enum ieee80211_sdata_state_bits - virtual interface state bits
 637  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 638  *      mirrors netif_running() but is separate for interface type
 639  *      change handling while the interface is up
 640  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 641  *      mode, so queues are stopped
 642  */
 643 enum ieee80211_sdata_state_bits {
 644         SDATA_STATE_RUNNING,
 645         SDATA_STATE_OFFCHANNEL,
 646 };
 647
 648 struct ieee80211_sub_if_data {
 649         struct list_head list;
 650
 651         struct wireless_dev wdev;
 652
 653         /* keys */
 654         struct list_head key_list;
 655
 656         /* count for keys needing tailroom space allocation */
 657         int crypto_tx_tailroom_needed_cnt;
 658
 659         struct net_device *dev;
 660         struct ieee80211_local *local;
 661
 662         unsigned int flags;
 663
 664         unsigned long state;
 665
 666         int drop_unencrypted;
 667
 668         char name[IFNAMSIZ];
 669
 670         /* to detect idle changes */
 671         bool old_idle;
 672
 673         /* Fragment table for host-based reassembly */
 674         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 675         unsigned int fragment_next;
 676
 677         /* TID bitmap for NoAck policy */
 678         u16 noack_map;
 679
 680         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 681         struct ieee80211_key __rcu *default_unicast_key;
 682         struct ieee80211_key __rcu *default_multicast_key;
 683         struct ieee80211_key __rcu *default_mgmt_key;
 684
 685         u16 sequence_number;
 686         __be16 control_port_protocol;
 687         bool control_port_no_encrypt;
 688
 689         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 690
 691         struct work_struct work;
 692         struct sk_buff_head skb_queue;
 693
 694         bool arp_filter_state;
 695
 696         /*
 697          * AP this belongs to: self in AP mode and
 698          * corresponding AP in VLAN mode, NULL for
 699          * all others (might be needed later in IBSS)
 700          */
 701         struct ieee80211_if_ap *bss;
 702
 703         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 704         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 705         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 706
 707         union {
 708                 struct ieee80211_if_ap ap;
 709                 struct ieee80211_if_wds wds;
 710                 struct ieee80211_if_vlan vlan;
 711                 struct ieee80211_if_managed mgd;
 712                 struct ieee80211_if_ibss ibss;
 713                 struct ieee80211_if_mesh mesh;
 714                 u32 mntr_flags;
 715         } u;
 716
 717 #ifdef CONFIG_MAC80211_DEBUGFS
 718         struct {
 719                 struct dentry *dir;
 720                 struct dentry *subdir_stations;
 721                 struct dentry *default_unicast_key;
 722                 struct dentry *default_multicast_key;
 723                 struct dentry *default_mgmt_key;
 724         } debugfs;
 725 #endif
 726         /* must be last, dynamically sized area in this! */
 727         struct ieee80211_vif vif;
 728 };
 729
 730 static inline
 731 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 732 {
 733         return container_of(p, struct ieee80211_sub_if_data, vif);
 734 }
 735
 736 enum sdata_queue_type {
 737         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 738         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 739         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 740 };
 741
 742 enum {
 743         IEEE80211_RX_MSG        = 1,
 744         IEEE80211_TX_STATUS_MSG = 2,
 745         IEEE80211_EOSP_MSG      = 3,
 746 };
 747
 748 struct skb_eosp_msg_data {
 749         u8 sta[ETH_ALEN], iface[ETH_ALEN];
 750 };
 751
 752 enum queue_stop_reason {
 753         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 754         IEEE80211_QUEUE_STOP_REASON_PS,
 755         IEEE80211_QUEUE_STOP_REASON_CSA,
 756         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 757         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 758         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 759 };
 760
 761 #ifdef CONFIG_MAC80211_LEDS
 762 struct tpt_led_trigger {
 763         struct led_trigger trig;
 764         char name[32];
 765         const struct ieee80211_tpt_blink *blink_table;
 766         unsigned int blink_table_len;
 767         struct timer_list timer;
 768         unsigned long prev_traffic;
 769         unsigned long tx_bytes, rx_bytes;
 770         unsigned int active, want;
 771         bool running;
 772 };
 773 #endif
 774
 775 /**
 776  * mac80211 scan flags - currently active scan mode
 777  *
 778  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 779  *      well be on the operating channel
 780  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 781  *      determine if we are on the operating channel or not
 782  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
 783  *      channel. This should not interrupt normal traffic.
 784  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 785  *      that the scan completed.
 786  * @SCAN_ABORTED: Set for our scan work function when the driver reported
 787  *      a scan complete for an aborted scan.
 788  */
 789 enum {
 790         SCAN_SW_SCANNING,
 791         SCAN_HW_SCANNING,
 792         SCAN_ONCHANNEL_SCANNING,
 793         SCAN_COMPLETED,
 794         SCAN_ABORTED,
 795 };
 796
 797 /**
 798  * enum mac80211_scan_state - scan state machine states
 799  *
 800  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 801  *      determines if we should keep on scanning or switch back to the
 802  *      operating channel
 803  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 804  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 805  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
 806  *      send out data
 807  * @SCAN_RESUME: Resume the scan and scan the next channel
 808  */
 809 enum mac80211_scan_state {
 810         SCAN_DECISION,
 811         SCAN_SET_CHANNEL,
 812         SCAN_SEND_PROBE,
 813         SCAN_SUSPEND,
 814         SCAN_RESUME,
 815 };
 816
 817 struct ieee80211_local {
 818         /* embed the driver visible part.
 819          * don't cast (use the static inlines below), but we keep
 820          * it first anyway so they become a no-op */
 821         struct ieee80211_hw hw;
 822
 823         const struct ieee80211_ops *ops;
 824
 825         /*
 826          * private workqueue to mac80211. mac80211 makes this accessible
 827          * via ieee80211_queue_work()
 828          */
 829         struct workqueue_struct *workqueue;
 830
 831         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 832         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 833         spinlock_t queue_stop_reason_lock;
 834
 835         int open_count;
 836         int monitors, cooked_mntrs;
 837         /* number of interfaces with corresponding FIF_ flags */
 838         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 839             fif_probe_req;
 840         int probe_req_reg;
 841         unsigned int filter_flags; /* FIF_* */
 842
 843         bool wiphy_ciphers_allocated;
 844
 845         /* protects the aggregated multicast list and filter calls */
 846         spinlock_t filter_lock;
 847
 848         /* used for uploading changed mc list */
 849         struct work_struct reconfig_filter;
 850
 851         /* used to reconfigure hardware SM PS */
 852         struct work_struct recalc_smps;
 853
 854         /* aggregated multicast list */
 855         struct netdev_hw_addr_list mc_list;
 856
 857         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 858
 859         /*
 860          * suspended is true if we finished all the suspend _and_ we have
 861          * not yet come up from resume. This is to be used by mac80211
 862          * to ensure driver sanity during suspend and mac80211's own
 863          * sanity. It can eventually be used for WoW as well.
 864          */
 865         bool suspended;
 866
 867         /*
 868          * Resuming is true while suspended, but when we're reprogramming the
 869          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 870          * again even though some other parts of the stack are still suspended
 871          * and we still drop received frames to avoid waking the stack.
 872          */
 873         bool resuming;
 874
 875         /*
 876          * quiescing is true during the suspend process _only_ to
 877          * ease timer cancelling etc.
 878          */
 879         bool quiescing;
 880
 881         /* device is started */
 882         bool started;
 883
 884         /* wowlan is enabled -- don't reconfig on resume */
 885         bool wowlan;
 886
 887         int tx_headroom; /* required headroom for hardware/radiotap */
 888
 889         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 890          * added to skb_queue will be processed, but frames in
 891          * skb_queue_unreliable may be dropped if the total length of these
 892          * queues increases over the limit. */
 893 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 894         struct tasklet_struct tasklet;
 895         struct sk_buff_head skb_queue;
 896         struct sk_buff_head skb_queue_unreliable;
 897
 898         /*
 899          * Internal FIFO queue which is shared between multiple rx path
 900          * stages. Its main task is to provide a serialization mechanism,
 901          * so all rx handlers can enjoy having exclusive access to their
 902          * private data structures.
 903          */
 904         struct sk_buff_head rx_skb_queue;
 905         bool running_rx_handler;        /* protected by rx_skb_queue.lock */
 906
 907         /* Station data */
 908         /*
 909          * The mutex only protects the list, hash table and
 910          * counter, reads are done with RCU.
 911          */
 912         struct mutex sta_mtx;
 913         spinlock_t tim_lock;
 914         unsigned long num_sta;
 915         struct list_head sta_list;
 916         struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
 917         struct timer_list sta_cleanup;
 918         int sta_generation;
 919
 920         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 921         struct tasklet_struct tx_pending_tasklet;
 922
 923         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 924
 925         /* number of interfaces with corresponding IFF_ flags */
 926         atomic_t iff_allmultis, iff_promiscs;
 927
 928         struct rate_control_ref *rate_ctrl;
 929
 930         struct crypto_cipher *wep_tx_tfm;
 931         struct crypto_cipher *wep_rx_tfm;
 932         u32 wep_iv;
 933
 934         /* see iface.c */
 935         struct list_head interfaces;
 936         struct mutex iflist_mtx;
 937
 938         /*
 939          * Key mutex, protects sdata's key_list and sta_info's
 940          * key pointers (write access, they're RCU.)
 941          */
 942         struct mutex key_mtx;
 943
 944         /* mutex for scan and work locking */
 945         struct mutex mtx;
 946
 947         /* Scanning and BSS list */
 948         unsigned long scanning;
 949         struct cfg80211_ssid scan_ssid;
 950         struct cfg80211_scan_request *int_scan_req;
 951         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 952         struct ieee80211_channel *scan_channel;
 953         enum ieee80211_band hw_scan_band;
 954         int scan_channel_idx;
 955         int scan_ies_len;
 956
 957         bool sched_scanning;
 958         struct ieee80211_sched_scan_ies sched_scan_ies;
 959         struct work_struct sched_scan_stopped_work;
 960
 961         unsigned long leave_oper_channel_time;
 962         enum mac80211_scan_state next_scan_state;
 963         struct delayed_work scan_work;
 964         struct ieee80211_sub_if_data *scan_sdata;
 965         enum nl80211_channel_type _oper_channel_type;
 966         struct ieee80211_channel *oper_channel, *csa_channel;
 967
 968         /* Temporary remain-on-channel for off-channel operations */
 969         struct ieee80211_channel *tmp_channel;
 970         enum nl80211_channel_type tmp_channel_type;
 971
 972         /* SNMP counters */
 973         /* dot11CountersTable */
 974         u32 dot11TransmittedFragmentCount;
 975         u32 dot11MulticastTransmittedFrameCount;
 976         u32 dot11FailedCount;
 977         u32 dot11RetryCount;
 978         u32 dot11MultipleRetryCount;
 979         u32 dot11FrameDuplicateCount;
 980         u32 dot11ReceivedFragmentCount;
 981         u32 dot11MulticastReceivedFrameCount;
 982         u32 dot11TransmittedFrameCount;
 983
 984 #ifdef CONFIG_MAC80211_LEDS
 985         int tx_led_counter, rx_led_counter;
 986         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 987         struct tpt_led_trigger *tpt_led_trigger;
 988         char tx_led_name[32], rx_led_name[32],
 989              assoc_led_name[32], radio_led_name[32];
 990 #endif
 991
 992 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 993         /* TX/RX handler statistics */
 994         unsigned int tx_handlers_drop;
 995         unsigned int tx_handlers_queued;
 996         unsigned int tx_handlers_drop_unencrypted;
 997         unsigned int tx_handlers_drop_fragment;
 998         unsigned int tx_handlers_drop_wep;
 999         unsigned int tx_handlers_drop_not_assoc;
1000         unsigned int tx_handlers_drop_unauth_port;
1001         unsigned int rx_handlers_drop;
1002         unsigned int rx_handlers_queued;
1003         unsigned int rx_handlers_drop_nullfunc;
1004         unsigned int rx_handlers_drop_defrag;
1005         unsigned int rx_handlers_drop_short;
1006         unsigned int rx_handlers_drop_passive_scan;
1007         unsigned int tx_expand_skb_head;
1008         unsigned int tx_expand_skb_head_cloned;
1009         unsigned int rx_expand_skb_head;
1010         unsigned int rx_expand_skb_head2;
1011         unsigned int rx_handlers_fragments;
1012         unsigned int tx_status_drop;
1013 #define I802_DEBUG_INC(c) (c)++
1014 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1015 #define I802_DEBUG_INC(c) do { } while (0)
1016 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1017
1018
1019         int total_ps_buffered; /* total number of all buffered unicast and
1020                                 * multicast packets for power saving stations
1021                                 */
1022         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
1023
1024         bool pspolling;
1025         bool offchannel_ps_enabled;
1026         /*
1027          * PS can only be enabled when we have exactly one managed
1028          * interface (and monitors) in PS, this then points there.
1029          */
1030         struct ieee80211_sub_if_data *ps_sdata;
1031         struct work_struct dynamic_ps_enable_work;
1032         struct work_struct dynamic_ps_disable_work;
1033         struct timer_list dynamic_ps_timer;
1034         struct notifier_block network_latency_notifier;
1035         struct notifier_block ifa_notifier;
1036
1037         /*
1038          * The dynamic ps timeout configured from user space via WEXT -
1039          * this will override whatever chosen by mac80211 internally.
1040          */
1041         int dynamic_ps_forced_timeout;
1042         int dynamic_ps_user_timeout;
1043         bool disable_dynamic_ps;
1044
1045         int user_power_level; /* in dBm */
1046         int power_constr_level; /* in dBm */
1047
1048         enum ieee80211_smps_mode smps_mode;
1049
1050         struct work_struct restart_work;
1051
1052 #ifdef CONFIG_MAC80211_DEBUGFS
1053         struct local_debugfsdentries {
1054                 struct dentry *rcdir;
1055                 struct dentry *keys;
1056         } debugfs;
1057 #endif
1058
1059         /*
1060          * Remain-on-channel support
1061          */
1062         struct list_head roc_list;
1063         struct work_struct hw_roc_start, hw_roc_done;
1064         unsigned long hw_roc_start_time;
1065
1066         struct idr ack_status_frames;
1067         spinlock_t ack_status_lock;
1068
1069         /* dummy netdev for use w/ NAPI */
1070         struct net_device napi_dev;
1071
1072         struct napi_struct napi;
1073
1074         /* virtual monitor interface */
1075         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1076 };
1077
1078 static inline struct ieee80211_sub_if_data *
1079 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1080 {
1081         return netdev_priv(dev);
1082 }
1083
1084 /* this struct represents 802.11n's RA/TID combination */
1085 struct ieee80211_ra_tid {
1086         u8 ra[ETH_ALEN];
1087         u16 tid;
1088 };
1089
1090 /* Parsed Information Elements */
1091 struct ieee802_11_elems {
1092         u8 *ie_start;
1093         size_t total_len;
1094
1095         /* pointers to IEs */
1096         u8 *ssid;
1097         u8 *supp_rates;
1098         u8 *fh_params;
1099         u8 *ds_params;
1100         u8 *cf_params;
1101         struct ieee80211_tim_ie *tim;
1102         u8 *ibss_params;
1103         u8 *challenge;
1104         u8 *wpa;
1105         u8 *rsn;
1106         u8 *erp_info;
1107         u8 *ext_supp_rates;
1108         u8 *wmm_info;
1109         u8 *wmm_param;
1110         struct ieee80211_ht_cap *ht_cap_elem;
1111         struct ieee80211_ht_operation *ht_operation;
1112         struct ieee80211_meshconf_ie *mesh_config;
1113         u8 *mesh_id;
1114         u8 *peering;
1115         u8 *preq;
1116         u8 *prep;
1117         u8 *perr;
1118         struct ieee80211_rann_ie *rann;
1119         u8 *ch_switch_elem;
1120         u8 *country_elem;
1121         u8 *pwr_constr_elem;
1122         u8 *quiet_elem; /* first quite element */
1123         u8 *timeout_int;
1124
1125         /* length of them, respectively */
1126         u8 ssid_len;
1127         u8 supp_rates_len;
1128         u8 fh_params_len;
1129         u8 ds_params_len;
1130         u8 cf_params_len;
1131         u8 tim_len;
1132         u8 ibss_params_len;
1133         u8 challenge_len;
1134         u8 wpa_len;
1135         u8 rsn_len;
1136         u8 erp_info_len;
1137         u8 ext_supp_rates_len;
1138         u8 wmm_info_len;
1139         u8 wmm_param_len;
1140         u8 mesh_id_len;
1141         u8 peering_len;
1142         u8 preq_len;
1143         u8 prep_len;
1144         u8 perr_len;
1145         u8 ch_switch_elem_len;
1146         u8 country_elem_len;
1147         u8 pwr_constr_elem_len;
1148         u8 quiet_elem_len;
1149         u8 num_of_quiet_elem;   /* can be more the one */
1150         u8 timeout_int_len;
1151
1152         /* whether a parse error occurred while retrieving these elements */
1153         bool parse_error;
1154 };
1155
1156 static inline struct ieee80211_local *hw_to_local(
1157         struct ieee80211_hw *hw)
1158 {
1159         return container_of(hw, struct ieee80211_local, hw);
1160 }
1161
1162
1163 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1164 {
1165         return ether_addr_equal(raddr, addr) ||
1166                is_broadcast_ether_addr(raddr);
1167 }
1168
1169
1170 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1171 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1172 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1173                                       u32 changed);
1174 void ieee80211_configure_filter(struct ieee80211_local *local);
1175 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1176
1177 /* STA code */
1178 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1179 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1180                        struct cfg80211_auth_request *req);
1181 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1182                         struct cfg80211_assoc_request *req);
1183 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1184                          struct cfg80211_deauth_request *req);
1185 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1186                            struct cfg80211_disassoc_request *req);
1187 void ieee80211_send_pspoll(struct ieee80211_local *local,
1188                            struct ieee80211_sub_if_data *sdata);
1189 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1190 int ieee80211_max_network_latency(struct notifier_block *nb,
1191                                   unsigned long data, void *dummy);
1192 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1193 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1194                                       struct ieee80211_channel_sw_ie *sw_elem,
1195                                       struct ieee80211_bss *bss,
1196                                       u64 timestamp);
1197 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1198 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1199 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1200 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1201                                   struct sk_buff *skb);
1202 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1203 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1204 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1205
1206 /* IBSS code */
1207 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1208 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1209 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1210                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1211 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1212                         struct cfg80211_ibss_params *params);
1213 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1214 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1215 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1216 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1217 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1218                                    struct sk_buff *skb);
1219
1220 /* mesh code */
1221 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1222 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1223                                    struct sk_buff *skb);
1224
1225 /* scan/BSS handling */
1226 void ieee80211_scan_work(struct work_struct *work);
1227 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1228                                     const u8 *ssid, u8 ssid_len,
1229                                     struct ieee80211_channel *chan);
1230 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1231                            struct cfg80211_scan_request *req);
1232 void ieee80211_scan_cancel(struct ieee80211_local *local);
1233 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1234 ieee80211_rx_result
1235 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1236
1237 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1238 struct ieee80211_bss *
1239 ieee80211_bss_info_update(struct ieee80211_local *local,
1240                           struct ieee80211_rx_status *rx_status,
1241                           struct ieee80211_mgmt *mgmt,
1242                           size_t len,
1243                           struct ieee802_11_elems *elems,
1244                           struct ieee80211_channel *channel,
1245                           bool beacon);
1246 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1247                           struct ieee80211_bss *bss);
1248
1249 /* scheduled scan handling */
1250 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1251                                        struct cfg80211_sched_scan_request *req);
1252 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1253 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1254
1255 /* off-channel helpers */
1256 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1257                                     bool offchannel_ps_enable);
1258 void ieee80211_offchannel_return(struct ieee80211_local *local,
1259                                  bool offchannel_ps_disable);
1260 void ieee80211_roc_setup(struct ieee80211_local *local);
1261 void ieee80211_start_next_roc(struct ieee80211_local *local);
1262 void ieee80211_roc_purge(struct ieee80211_sub_if_data *sdata);
1263 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc);
1264 void ieee80211_sw_roc_work(struct work_struct *work);
1265 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1266
1267 /* interface handling */
1268 int ieee80211_iface_init(void);
1269 void ieee80211_iface_exit(void);
1270 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1271                      struct net_device **new_dev, enum nl80211_iftype type,
1272                      struct vif_params *params);
1273 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1274                              enum nl80211_iftype type);
1275 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1276 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1277 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1278 void ieee80211_recalc_idle(struct ieee80211_local *local);
1279 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1280                                     const int offset);
1281
1282 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1283 {
1284         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1285 }
1286
1287 /* tx handling */
1288 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1289 void ieee80211_tx_pending(unsigned long data);
1290 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1291                                          struct net_device *dev);
1292 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1293                                        struct net_device *dev);
1294
1295 /* HT */
1296 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1297                                      struct ieee80211_sta_ht_cap *ht_cap);
1298 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1299                                        struct ieee80211_supported_band *sband,
1300                                        struct ieee80211_ht_cap *ht_cap_ie,
1301                                        struct ieee80211_sta_ht_cap *ht_cap);
1302 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1303                           const u8 *da, u16 tid,
1304                           u16 initiator, u16 reason_code);
1305 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1306                                enum ieee80211_smps_mode smps, const u8 *da,
1307                                const u8 *bssid);
1308 void ieee80211_request_smps_work(struct work_struct *work);
1309
1310 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1311                                      u16 initiator, u16 reason, bool stop);
1312 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1313                                     u16 initiator, u16 reason, bool stop);
1314 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1315 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1316                              struct sta_info *sta,
1317                              struct ieee80211_mgmt *mgmt, size_t len);
1318 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1319                                   struct sta_info *sta,
1320                                   struct ieee80211_mgmt *mgmt,
1321                                   size_t len);
1322 void ieee80211_process_addba_request(struct ieee80211_local *local,
1323                                      struct sta_info *sta,
1324                                      struct ieee80211_mgmt *mgmt,
1325                                      size_t len);
1326
1327 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1328                                    enum ieee80211_back_parties initiator,
1329                                    bool tx);
1330 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1331                                     enum ieee80211_back_parties initiator,
1332                                     bool tx);
1333 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1334 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1335 void ieee80211_ba_session_work(struct work_struct *work);
1336 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1337 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1338
1339 /* Spectrum management */
1340 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1341                                        struct ieee80211_mgmt *mgmt,
1342                                        size_t len);
1343
1344 /* Suspend/resume and hw reconfiguration */
1345 int ieee80211_reconfig(struct ieee80211_local *local);
1346 void ieee80211_stop_device(struct ieee80211_local *local);
1347
1348 #ifdef CONFIG_PM
1349 int __ieee80211_suspend(struct ieee80211_hw *hw,
1350                         struct cfg80211_wowlan *wowlan);
1351
1352 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1353 {
1354         struct ieee80211_local *local = hw_to_local(hw);
1355
1356         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1357                 "%s: resume with hardware scan still in progress\n",
1358                 wiphy_name(hw->wiphy));
1359
1360         return ieee80211_reconfig(hw_to_local(hw));
1361 }
1362 #else
1363 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1364                                       struct cfg80211_wowlan *wowlan)
1365 {
1366         return 0;
1367 }
1368
1369 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1370 {
1371         return 0;
1372 }
1373 #endif
1374
1375 /* utility functions/constants */
1376 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1377 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1378                         enum nl80211_iftype type);
1379 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1380                              int rate, int erp, int short_preamble);
1381 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1382                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1383                                      gfp_t gfp);
1384 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1385                                bool bss_notify);
1386 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1387
1388 void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1389                           struct sk_buff *skb, int tid);
1390 static void inline ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1391                                     struct sk_buff *skb)
1392 {
1393         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1394         ieee80211_tx_skb_tid(sdata, skb, 7);
1395 }
1396
1397 void ieee802_11_parse_elems(u8 *start, size_t len,
1398                             struct ieee802_11_elems *elems);
1399 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1400                                struct ieee802_11_elems *elems,
1401                                u64 filter, u32 crc);
1402 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1403                               enum ieee80211_band band);
1404
1405 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1406 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1407 void ieee80211_dynamic_ps_timer(unsigned long data);
1408 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1409                              struct ieee80211_sub_if_data *sdata,
1410                              int powersave);
1411 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1412                              struct ieee80211_hdr *hdr);
1413 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1414                              struct ieee80211_hdr *hdr, bool ack);
1415 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1416
1417 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1418                                      enum queue_stop_reason reason);
1419 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1420                                      enum queue_stop_reason reason);
1421 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1422                                     enum queue_stop_reason reason);
1423 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1424                                     enum queue_stop_reason reason);
1425 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1426 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1427                                struct sk_buff *skb);
1428 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1429                                    struct sk_buff_head *skbs,
1430                                    void (*fn)(void *data), void *data);
1431 static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1432                                               struct sk_buff_head *skbs)
1433 {
1434         ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
1435 }
1436
1437 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1438                          u16 transaction, u16 auth_alg,
1439                          u8 *extra, size_t extra_len, const u8 *bssid,
1440                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx);
1441 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1442                              const u8 *ie, size_t ie_len,
1443                              enum ieee80211_band band, u32 rate_mask,
1444                              u8 channel);
1445 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1446                                           u8 *dst, u32 ratemask,
1447                                           const u8 *ssid, size_t ssid_len,
1448                                           const u8 *ie, size_t ie_len,
1449                                           bool directed);
1450 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1451                               const u8 *ssid, size_t ssid_len,
1452                               const u8 *ie, size_t ie_len,
1453                               u32 ratemask, bool directed, bool no_cck);
1454
1455 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1456                                   const size_t supp_rates_len,
1457                                   const u8 *supp_rates);
1458 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1459                             struct ieee802_11_elems *elems,
1460                             enum ieee80211_band band, u32 *basic_rates);
1461 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1462                              enum ieee80211_smps_mode smps_mode);
1463 void ieee80211_recalc_smps(struct ieee80211_local *local);
1464
1465 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1466                           const u8 *ids, int n_ids, size_t offset);
1467 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1468 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1469                               u16 cap);
1470 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1471                                struct ieee80211_channel *channel,
1472                                enum nl80211_channel_type channel_type,
1473                                u16 prot_mode);
1474
1475 /* channel management */
1476 enum ieee80211_chan_mode {
1477         CHAN_MODE_UNDEFINED,
1478         CHAN_MODE_HOPPING,
1479         CHAN_MODE_FIXED,
1480 };
1481
1482 enum ieee80211_chan_mode
1483 ieee80211_get_channel_mode(struct ieee80211_local *local,
1484                            struct ieee80211_sub_if_data *ignore);
1485 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1486                                 struct ieee80211_sub_if_data *sdata,
1487                                 enum nl80211_channel_type chantype);
1488 enum nl80211_channel_type
1489 ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper);
1490
1491 #ifdef CONFIG_MAC80211_NOINLINE
1492 #define debug_noinline noinline
1493 #else
1494 #define debug_noinline
1495 #endif
1496
1497 #endif /* IEEE80211_I_H */