net/mac80211/ieee80211_i.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007-2010  Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef IEEE80211_I_H
  13 #define IEEE80211_I_H
  14
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/etherdevice.h>
  26 #include <net/ieee80211_radiotap.h>
  27 #include <net/cfg80211.h>
  28 #include <net/mac80211.h>
  29 #include "key.h"
  30 #include "sta_info.h"
  31
  32 struct ieee80211_local;
  33
  34 /* Maximum number of broadcast/multicast frames to buffer when some of the
  35  * associated stations are using power saving. */
  36 #define AP_MAX_BC_BUFFER 128
  37
  38 /* Maximum number of frames buffered to all STAs, including multicast frames.
  39  * Note: increasing this limit increases the potential memory requirement. Each
  40  * frame can be up to about 2 kB long. */
  41 #define TOTAL_MAX_TX_BUFFER 512
  42
  43 /* Required encryption head and tailroom */
  44 #define IEEE80211_ENCRYPT_HEADROOM 8
  45 #define IEEE80211_ENCRYPT_TAILROOM 18
  46
  47 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  48  * reception of at least three fragmented frames. This limit can be increased
  49  * by changing this define, at the cost of slower frame reassembly and
  50  * increased memory use (about 2 kB of RAM per entry). */
  51 #define IEEE80211_FRAGMENT_MAX 4
  52
  53 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  54
  55 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
  56         (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK |   \
  57          IEEE80211_WMM_IE_STA_QOSINFO_AC_BE |   \
  58          IEEE80211_WMM_IE_STA_QOSINFO_AC_VI |   \
  59          IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
  60
  61 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  62         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  63
  64 struct ieee80211_fragment_entry {
  65         unsigned long first_frag_time;
  66         unsigned int seq;
  67         unsigned int rx_queue;
  68         unsigned int last_frag;
  69         unsigned int extra_len;
  70         struct sk_buff_head skb_list;
  71         int ccmp; /* Whether fragments were encrypted with CCMP */
  72         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  73 };
  74
  75
  76 struct ieee80211_bss {
  77         /* don't want to look up all the time */
  78         size_t ssid_len;
  79         u8 ssid[IEEE80211_MAX_SSID_LEN];
  80
  81         u8 dtim_period;
  82
  83         bool wmm_used;
  84         bool uapsd_supported;
  85
  86         unsigned long last_probe_resp;
  87
  88 #ifdef CONFIG_MAC80211_MESH
  89         u8 *mesh_id;
  90         size_t mesh_id_len;
  91         u8 *mesh_cfg;
  92 #endif
  93
  94 #define IEEE80211_MAX_SUPP_RATES 32
  95         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  96         size_t supp_rates_len;
  97
  98         /*
  99          * During assocation, we save an ERP value from a probe response so
 100          * that we can feed ERP info to the driver when handling the
 101          * association completes. these fields probably won't be up-to-date
 102          * otherwise, you probably don't want to use them.
 103          */
 104         bool has_erp_value;
 105         u8 erp_value;
 106 };
 107
 108 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 109 {
 110 #ifdef CONFIG_MAC80211_MESH
 111         return bss->mesh_cfg;
 112 #endif
 113         return NULL;
 114 }
 115
 116 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 117 {
 118 #ifdef CONFIG_MAC80211_MESH
 119         return bss->mesh_id;
 120 #endif
 121         return NULL;
 122 }
 123
 124 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 125 {
 126 #ifdef CONFIG_MAC80211_MESH
 127         return bss->mesh_id_len;
 128 #endif
 129         return 0;
 130 }
 131
 132
 133 typedef unsigned __bitwise__ ieee80211_tx_result;
 134 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 135 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 136 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 137
 138 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 139 #define IEEE80211_TX_UNICAST            BIT(1)
 140 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 141
 142 struct ieee80211_tx_data {
 143         struct sk_buff *skb;
 144         struct ieee80211_local *local;
 145         struct ieee80211_sub_if_data *sdata;
 146         struct sta_info *sta;
 147         struct ieee80211_key *key;
 148
 149         struct ieee80211_channel *channel;
 150
 151         u16 ethertype;
 152         unsigned int flags;
 153 };
 154
 155
 156 typedef unsigned __bitwise__ ieee80211_rx_result;
 157 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 158 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 159 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 160 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 161
 162 #define IEEE80211_RX_IN_SCAN            BIT(0)
 163 /* frame is destined to interface currently processed (incl. multicast frames) */
 164 #define IEEE80211_RX_RA_MATCH           BIT(1)
 165 #define IEEE80211_RX_AMSDU              BIT(2)
 166 #define IEEE80211_RX_FRAGMENTED         BIT(3)
 167 #define IEEE80211_MALFORMED_ACTION_FRM  BIT(4)
 168 /* only add flags here that do not change with subframes of an aMPDU */
 169
 170 struct ieee80211_rx_data {
 171         struct sk_buff *skb;
 172         struct ieee80211_local *local;
 173         struct ieee80211_sub_if_data *sdata;
 174         struct sta_info *sta;
 175         struct ieee80211_key *key;
 176
 177         unsigned int flags;
 178         int queue;
 179         u32 tkip_iv32;
 180         u16 tkip_iv16;
 181 };
 182
 183 struct beacon_data {
 184         u8 *head, *tail;
 185         int head_len, tail_len;
 186         int dtim_period;
 187 };
 188
 189 struct ieee80211_if_ap {
 190         struct beacon_data *beacon;
 191
 192         struct list_head vlans;
 193
 194         /* yes, this looks ugly, but guarantees that we can later use
 195          * bitmap_empty :)
 196          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 197         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 198         struct sk_buff_head ps_bc_buf;
 199         atomic_t num_sta_ps; /* number of stations in PS mode */
 200         int dtim_count;
 201 };
 202
 203 struct ieee80211_if_wds {
 204         struct sta_info *sta;
 205         u8 remote_addr[ETH_ALEN];
 206 };
 207
 208 struct ieee80211_if_vlan {
 209         struct list_head list;
 210
 211         /* used for all tx if the VLAN is configured to 4-addr mode */
 212         struct sta_info *sta;
 213 };
 214
 215 struct mesh_stats {
 216         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 217         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 218         __u32 fwded_frames;             /* Mesh total forwarded frames */
 219         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 220         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 221         atomic_t estab_plinks;
 222 };
 223
 224 #define PREQ_Q_F_START          0x1
 225 #define PREQ_Q_F_REFRESH        0x2
 226 struct mesh_preq_queue {
 227         struct list_head list;
 228         u8 dst[ETH_ALEN];
 229         u8 flags;
 230 };
 231
 232 enum ieee80211_work_type {
 233         IEEE80211_WORK_ABORT,
 234         IEEE80211_WORK_DIRECT_PROBE,
 235         IEEE80211_WORK_AUTH,
 236         IEEE80211_WORK_ASSOC_BEACON_WAIT,
 237         IEEE80211_WORK_ASSOC,
 238         IEEE80211_WORK_REMAIN_ON_CHANNEL,
 239 };
 240
 241 /**
 242  * enum work_done_result - indicates what to do after work was done
 243  *
 244  * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
 245  * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
 246  *      should be requeued.
 247  */
 248 enum work_done_result {
 249         WORK_DONE_DESTROY,
 250         WORK_DONE_REQUEUE,
 251 };
 252
 253 struct ieee80211_work {
 254         struct list_head list;
 255
 256         struct rcu_head rcu_head;
 257
 258         struct ieee80211_sub_if_data *sdata;
 259
 260         enum work_done_result (*done)(struct ieee80211_work *wk,
 261                                       struct sk_buff *skb);
 262
 263         struct ieee80211_channel *chan;
 264         enum nl80211_channel_type chan_type;
 265
 266         unsigned long timeout;
 267         enum ieee80211_work_type type;
 268
 269         u8 filter_ta[ETH_ALEN];
 270
 271         bool started;
 272
 273         union {
 274                 struct {
 275                         int tries;
 276                         u16 algorithm, transaction;
 277                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 278                         u8 ssid_len;
 279                         u8 key[WLAN_KEY_LEN_WEP104];
 280                         u8 key_len, key_idx;
 281                         bool privacy;
 282                 } probe_auth;
 283                 struct {
 284                         struct cfg80211_bss *bss;
 285                         const u8 *supp_rates;
 286                         const u8 *ht_information_ie;
 287                         enum ieee80211_smps_mode smps;
 288                         int tries;
 289                         u16 capability;
 290                         u8 prev_bssid[ETH_ALEN];
 291                         u8 ssid[IEEE80211_MAX_SSID_LEN];
 292                         u8 ssid_len;
 293                         u8 supp_rates_len;
 294                         bool wmm_used, use_11n, uapsd_used;
 295                 } assoc;
 296                 struct {
 297                         u32 duration;
 298                 } remain;
 299         };
 300
 301         int ie_len;
 302         /* must be last */
 303         u8 ie[0];
 304 };
 305
 306 /* flags used in struct ieee80211_if_managed.flags */
 307 enum ieee80211_sta_flags {
 308         IEEE80211_STA_BEACON_POLL       = BIT(0),
 309         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 310         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 311         IEEE80211_STA_DISABLE_11N       = BIT(4),
 312         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 313         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 314         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 315         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 316         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 317 };
 318
 319 struct ieee80211_if_managed {
 320         struct timer_list timer;
 321         struct timer_list conn_mon_timer;
 322         struct timer_list bcn_mon_timer;
 323         struct timer_list chswitch_timer;
 324         struct work_struct monitor_work;
 325         struct work_struct chswitch_work;
 326         struct work_struct beacon_connection_loss_work;
 327
 328         unsigned long probe_timeout;
 329         int probe_send_count;
 330
 331         struct mutex mtx;
 332         struct cfg80211_bss *associated;
 333
 334         u8 bssid[ETH_ALEN];
 335
 336         u16 aid;
 337
 338         unsigned long timers_running; /* used for quiesce/restart */
 339         bool powersave; /* powersave requested for this iface */
 340         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 341                                  ap_smps, /* smps mode AP thinks we're in */
 342                                  driver_smps_mode; /* smps mode request */
 343
 344         struct work_struct request_smps_work;
 345
 346         unsigned int flags;
 347
 348         u32 beacon_crc;
 349
 350         enum {
 351                 IEEE80211_MFP_DISABLED,
 352                 IEEE80211_MFP_OPTIONAL,
 353                 IEEE80211_MFP_REQUIRED
 354         } mfp; /* management frame protection */
 355
 356         int wmm_last_param_set;
 357
 358         u8 use_4addr;
 359
 360         /* Signal strength from the last Beacon frame in the current BSS. */
 361         int last_beacon_signal;
 362
 363         /*
 364          * Weighted average of the signal strength from Beacon frames in the
 365          * current BSS. This is in units of 1/16 of the signal unit to maintain
 366          * accuracy and to speed up calculations, i.e., the value need to be
 367          * divided by 16 to get the actual value.
 368          */
 369         int ave_beacon_signal;
 370
 371         /*
 372          * Number of Beacon frames used in ave_beacon_signal. This can be used
 373          * to avoid generating less reliable cqm events that would be based
 374          * only on couple of received frames.
 375          */
 376         unsigned int count_beacon_signal;
 377
 378         /*
 379          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 380          * that triggered a cqm event. 0 indicates that no event has been
 381          * generated for the current association.
 382          */
 383         int last_cqm_event_signal;
 384 };
 385
 386 struct ieee80211_if_ibss {
 387         struct timer_list timer;
 388
 389         struct mutex mtx;
 390
 391         unsigned long last_scan_completed;
 392
 393         u32 basic_rates;
 394
 395         bool timer_running;
 396
 397         bool fixed_bssid;
 398         bool fixed_channel;
 399         bool privacy;
 400
 401         u8 bssid[ETH_ALEN];
 402         u8 ssid[IEEE80211_MAX_SSID_LEN];
 403         u8 ssid_len, ie_len;
 404         u8 *ie;
 405         struct ieee80211_channel *channel;
 406
 407         unsigned long ibss_join_req;
 408         /* probe response/beacon for IBSS */
 409         struct sk_buff *presp, *skb;
 410
 411         enum {
 412                 IEEE80211_IBSS_MLME_SEARCH,
 413                 IEEE80211_IBSS_MLME_JOINED,
 414         } state;
 415 };
 416
 417 struct ieee80211_if_mesh {
 418         struct timer_list housekeeping_timer;
 419         struct timer_list mesh_path_timer;
 420         struct timer_list mesh_path_root_timer;
 421
 422         unsigned long timers_running;
 423
 424         unsigned long wrkq_flags;
 425
 426         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 427         size_t mesh_id_len;
 428         /* Active Path Selection Protocol Identifier */
 429         u8 mesh_pp_id;
 430         /* Active Path Selection Metric Identifier */
 431         u8 mesh_pm_id;
 432         /* Congestion Control Mode Identifier */
 433         u8 mesh_cc_id;
 434         /* Synchronization Protocol Identifier */
 435         u8 mesh_sp_id;
 436         /* Authentication Protocol Identifier */
 437         u8 mesh_auth_id;
 438         /* Local mesh Sequence Number */
 439         u32 sn;
 440         /* Last used PREQ ID */
 441         u32 preq_id;
 442         atomic_t mpaths;
 443         /* Timestamp of last SN update */
 444         unsigned long last_sn_update;
 445         /* Timestamp of last SN sent */
 446         unsigned long last_preq;
 447         struct mesh_rmc *rmc;
 448         spinlock_t mesh_preq_queue_lock;
 449         struct mesh_preq_queue preq_queue;
 450         int preq_queue_len;
 451         struct mesh_stats mshstats;
 452         struct mesh_config mshcfg;
 453         u32 mesh_seqnum;
 454         bool accepting_plinks;
 455 };
 456
 457 #ifdef CONFIG_MAC80211_MESH
 458 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 459         do { (msh)->mshstats.name++; } while (0)
 460 #else
 461 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 462         do { } while (0)
 463 #endif
 464
 465 /**
 466  * enum ieee80211_sub_if_data_flags - virtual interface flags
 467  *
 468  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 469  * @IEEE80211_SDATA_PROMISC: interface is promisc
 470  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 471  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 472  *      associated stations and deliver multicast frames both
 473  *      back to wireless media and to the local net stack.
 474  */
 475 enum ieee80211_sub_if_data_flags {
 476         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 477         IEEE80211_SDATA_PROMISC                 = BIT(1),
 478         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 479         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 480 };
 481
 482 /**
 483  * enum ieee80211_sdata_state_bits - virtual interface state bits
 484  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 485  *      mirrors netif_running() but is separate for interface type
 486  *      change handling while the interface is up
 487  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 488  *      mode, so queues are stopped
 489  */
 490 enum ieee80211_sdata_state_bits {
 491         SDATA_STATE_RUNNING,
 492         SDATA_STATE_OFFCHANNEL,
 493 };
 494
 495 struct ieee80211_sub_if_data {
 496         struct list_head list;
 497
 498         struct wireless_dev wdev;
 499
 500         /* keys */
 501         struct list_head key_list;
 502
 503         struct net_device *dev;
 504         struct ieee80211_local *local;
 505
 506         unsigned int flags;
 507
 508         unsigned long state;
 509
 510         int drop_unencrypted;
 511
 512         char name[IFNAMSIZ];
 513
 514         /*
 515          * keep track of whether the HT opmode (stored in
 516          * vif.bss_info.ht_operation_mode) is valid.
 517          */
 518         bool ht_opmode_valid;
 519
 520         /* to detect idle changes */
 521         bool old_idle;
 522
 523         /* Fragment table for host-based reassembly */
 524         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 525         unsigned int fragment_next;
 526
 527 #define NUM_DEFAULT_KEYS 4
 528 #define NUM_DEFAULT_MGMT_KEYS 2
 529         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 530         struct ieee80211_key *default_key;
 531         struct ieee80211_key *default_mgmt_key;
 532
 533         u16 sequence_number;
 534         __be16 control_port_protocol;
 535         bool control_port_no_encrypt;
 536
 537         struct work_struct work;
 538         struct sk_buff_head skb_queue;
 539
 540         bool arp_filter_state;
 541
 542         /*
 543          * AP this belongs to: self in AP mode and
 544          * corresponding AP in VLAN mode, NULL for
 545          * all others (might be needed later in IBSS)
 546          */
 547         struct ieee80211_if_ap *bss;
 548
 549         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 550         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
 551
 552         union {
 553                 struct ieee80211_if_ap ap;
 554                 struct ieee80211_if_wds wds;
 555                 struct ieee80211_if_vlan vlan;
 556                 struct ieee80211_if_managed mgd;
 557                 struct ieee80211_if_ibss ibss;
 558 #ifdef CONFIG_MAC80211_MESH
 559                 struct ieee80211_if_mesh mesh;
 560 #endif
 561                 u32 mntr_flags;
 562         } u;
 563
 564 #ifdef CONFIG_MAC80211_DEBUGFS
 565         struct {
 566                 struct dentry *dir;
 567                 struct dentry *subdir_stations;
 568                 struct dentry *default_key;
 569                 struct dentry *default_mgmt_key;
 570         } debugfs;
 571 #endif
 572         /* must be last, dynamically sized area in this! */
 573         struct ieee80211_vif vif;
 574 };
 575
 576 static inline
 577 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 578 {
 579         return container_of(p, struct ieee80211_sub_if_data, vif);
 580 }
 581
 582 static inline void
 583 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 584                             u8 mesh_id_len, u8 *mesh_id)
 585 {
 586 #ifdef CONFIG_MAC80211_MESH
 587         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 588         ifmsh->mesh_id_len = mesh_id_len;
 589         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 590 #else
 591         WARN_ON(1);
 592 #endif
 593 }
 594
 595 enum sdata_queue_type {
 596         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
 597         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
 598         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
 599 };
 600
 601 enum {
 602         IEEE80211_RX_MSG        = 1,
 603         IEEE80211_TX_STATUS_MSG = 2,
 604 };
 605
 606 enum queue_stop_reason {
 607         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 608         IEEE80211_QUEUE_STOP_REASON_PS,
 609         IEEE80211_QUEUE_STOP_REASON_CSA,
 610         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 611         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 612         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 613 };
 614
 615 /**
 616  * mac80211 scan flags - currently active scan mode
 617  *
 618  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 619  *      well be on the operating channel
 620  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 621  *      determine if we are on the operating channel or not
 622  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 623  *      gets only set in conjunction with SCAN_SW_SCANNING
 624  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
 625  *      that the scan completed.
 626  * @SCAN_ABORTED: Set for our scan work function when the driver reported
 627  *      a scan complete for an aborted scan.
 628  */
 629 enum {
 630         SCAN_SW_SCANNING,
 631         SCAN_HW_SCANNING,
 632         SCAN_OFF_CHANNEL,
 633         SCAN_COMPLETED,
 634         SCAN_ABORTED,
 635 };
 636
 637 /**
 638  * enum mac80211_scan_state - scan state machine states
 639  *
 640  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 641  *      determines if we should keep on scanning or switch back to the
 642  *      operating channel
 643  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 644  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 645  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 646  *      about us leaving the channel and stop all associated STA interfaces
 647  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 648  *      AP about us being back and restart all associated STA interfaces
 649  */
 650 enum mac80211_scan_state {
 651         SCAN_DECISION,
 652         SCAN_SET_CHANNEL,
 653         SCAN_SEND_PROBE,
 654         SCAN_LEAVE_OPER_CHANNEL,
 655         SCAN_ENTER_OPER_CHANNEL,
 656 };
 657
 658 struct ieee80211_local {
 659         /* embed the driver visible part.
 660          * don't cast (use the static inlines below), but we keep
 661          * it first anyway so they become a no-op */
 662         struct ieee80211_hw hw;
 663
 664         const struct ieee80211_ops *ops;
 665
 666         /*
 667          * work stuff, potentially off-channel (in the future)
 668          */
 669         struct list_head work_list;
 670         struct timer_list work_timer;
 671         struct work_struct work_work;
 672         struct sk_buff_head work_skb_queue;
 673
 674         /*
 675          * private workqueue to mac80211. mac80211 makes this accessible
 676          * via ieee80211_queue_work()
 677          */
 678         struct workqueue_struct *workqueue;
 679
 680         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 681         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 682         spinlock_t queue_stop_reason_lock;
 683
 684         int open_count;
 685         int monitors, cooked_mntrs;
 686         /* number of interfaces with corresponding FIF_ flags */
 687         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
 688         unsigned int filter_flags; /* FIF_* */
 689
 690         bool wiphy_ciphers_allocated;
 691
 692         /* protects the aggregated multicast list and filter calls */
 693         spinlock_t filter_lock;
 694
 695         /* used for uploading changed mc list */
 696         struct work_struct reconfig_filter;
 697
 698         /* used to reconfigure hardware SM PS */
 699         struct work_struct recalc_smps;
 700
 701         /* aggregated multicast list */
 702         struct netdev_hw_addr_list mc_list;
 703
 704         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 705
 706         /*
 707          * suspended is true if we finished all the suspend _and_ we have
 708          * not yet come up from resume. This is to be used by mac80211
 709          * to ensure driver sanity during suspend and mac80211's own
 710          * sanity. It can eventually be used for WoW as well.
 711          */
 712         bool suspended;
 713
 714         /*
 715          * Resuming is true while suspended, but when we're reprogramming the
 716          * hardware -- at that time it's allowed to use ieee80211_queue_work()
 717          * again even though some other parts of the stack are still suspended
 718          * and we still drop received frames to avoid waking the stack.
 719          */
 720         bool resuming;
 721
 722         /*
 723          * quiescing is true during the suspend process _only_ to
 724          * ease timer cancelling etc.
 725          */
 726         bool quiescing;
 727
 728         /* device is started */
 729         bool started;
 730
 731         int tx_headroom; /* required headroom for hardware/radiotap */
 732
 733         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 734          * added to skb_queue will be processed, but frames in
 735          * skb_queue_unreliable may be dropped if the total length of these
 736          * queues increases over the limit. */
 737 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 738         struct tasklet_struct tasklet;
 739         struct sk_buff_head skb_queue;
 740         struct sk_buff_head skb_queue_unreliable;
 741
 742         /* Station data */
 743         /*
 744          * The mutex only protects the list and counter,
 745          * reads are done in RCU.
 746          * Additionally, the lock protects the hash table,
 747          * the pending list and each BSS's TIM bitmap.
 748          */
 749         struct mutex sta_mtx;
 750         spinlock_t sta_lock;
 751         unsigned long num_sta;
 752         struct list_head sta_list, sta_pending_list;
 753         struct sta_info *sta_hash[STA_HASH_SIZE];
 754         struct timer_list sta_cleanup;
 755         struct work_struct sta_finish_work;
 756         int sta_generation;
 757
 758         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 759         struct tasklet_struct tx_pending_tasklet;
 760
 761         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
 762
 763         /* number of interfaces with corresponding IFF_ flags */
 764         atomic_t iff_allmultis, iff_promiscs;
 765
 766         struct rate_control_ref *rate_ctrl;
 767
 768         struct crypto_blkcipher *wep_tx_tfm;
 769         struct crypto_blkcipher *wep_rx_tfm;
 770         u32 wep_iv;
 771
 772         /* see iface.c */
 773         struct list_head interfaces;
 774         struct mutex iflist_mtx;
 775
 776         /*
 777          * Key mutex, protects sdata's key_list and sta_info's
 778          * key pointers (write access, they're RCU.)
 779          */
 780         struct mutex key_mtx;
 781
 782         /* mutex for scan and work locking */
 783         struct mutex mtx;
 784
 785         /* Scanning and BSS list */
 786         unsigned long scanning;
 787         struct cfg80211_ssid scan_ssid;
 788         struct cfg80211_scan_request *int_scan_req;
 789         struct cfg80211_scan_request *scan_req, *hw_scan_req;
 790         struct ieee80211_channel *scan_channel;
 791         enum ieee80211_band hw_scan_band;
 792         int scan_channel_idx;
 793         int scan_ies_len;
 794
 795         unsigned long leave_oper_channel_time;
 796         enum mac80211_scan_state next_scan_state;
 797         struct delayed_work scan_work;
 798         struct ieee80211_sub_if_data *scan_sdata;
 799         enum nl80211_channel_type _oper_channel_type;
 800         struct ieee80211_channel *oper_channel, *csa_channel;
 801
 802         /* Temporary remain-on-channel for off-channel operations */
 803         struct ieee80211_channel *tmp_channel;
 804         enum nl80211_channel_type tmp_channel_type;
 805
 806         /* SNMP counters */
 807         /* dot11CountersTable */
 808         u32 dot11TransmittedFragmentCount;
 809         u32 dot11MulticastTransmittedFrameCount;
 810         u32 dot11FailedCount;
 811         u32 dot11RetryCount;
 812         u32 dot11MultipleRetryCount;
 813         u32 dot11FrameDuplicateCount;
 814         u32 dot11ReceivedFragmentCount;
 815         u32 dot11MulticastReceivedFrameCount;
 816         u32 dot11TransmittedFrameCount;
 817
 818 #ifdef CONFIG_MAC80211_LEDS
 819         int tx_led_counter, rx_led_counter;
 820         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 821         char tx_led_name[32], rx_led_name[32],
 822              assoc_led_name[32], radio_led_name[32];
 823 #endif
 824
 825 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 826         /* TX/RX handler statistics */
 827         unsigned int tx_handlers_drop;
 828         unsigned int tx_handlers_queued;
 829         unsigned int tx_handlers_drop_unencrypted;
 830         unsigned int tx_handlers_drop_fragment;
 831         unsigned int tx_handlers_drop_wep;
 832         unsigned int tx_handlers_drop_not_assoc;
 833         unsigned int tx_handlers_drop_unauth_port;
 834         unsigned int rx_handlers_drop;
 835         unsigned int rx_handlers_queued;
 836         unsigned int rx_handlers_drop_nullfunc;
 837         unsigned int rx_handlers_drop_defrag;
 838         unsigned int rx_handlers_drop_short;
 839         unsigned int rx_handlers_drop_passive_scan;
 840         unsigned int tx_expand_skb_head;
 841         unsigned int tx_expand_skb_head_cloned;
 842         unsigned int rx_expand_skb_head;
 843         unsigned int rx_expand_skb_head2;
 844         unsigned int rx_handlers_fragments;
 845         unsigned int tx_status_drop;
 846 #define I802_DEBUG_INC(c) (c)++
 847 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 848 #define I802_DEBUG_INC(c) do { } while (0)
 849 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 850
 851
 852         int total_ps_buffered; /* total number of all buffered unicast and
 853                                 * multicast packets for power saving stations
 854                                 */
 855         int wifi_wme_noack_test;
 856         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 857
 858         /*
 859          * Bitmask of enabled u-apsd queues,
 860          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 861          * to take effect.
 862          */
 863         unsigned int uapsd_queues;
 864
 865         /*
 866          * Maximum number of buffered frames AP can deliver during a
 867          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 868          * Needs a new association to take effect.
 869          */
 870         unsigned int uapsd_max_sp_len;
 871
 872         bool pspolling;
 873         bool offchannel_ps_enabled;
 874         /*
 875          * PS can only be enabled when we have exactly one managed
 876          * interface (and monitors) in PS, this then points there.
 877          */
 878         struct ieee80211_sub_if_data *ps_sdata;
 879         struct work_struct dynamic_ps_enable_work;
 880         struct work_struct dynamic_ps_disable_work;
 881         struct timer_list dynamic_ps_timer;
 882         struct notifier_block network_latency_notifier;
 883         struct notifier_block ifa_notifier;
 884
 885         /*
 886          * The dynamic ps timeout configured from user space via WEXT -
 887          * this will override whatever chosen by mac80211 internally.
 888          */
 889         int dynamic_ps_forced_timeout;
 890         int dynamic_ps_user_timeout;
 891         bool disable_dynamic_ps;
 892
 893         int user_power_level; /* in dBm */
 894         int power_constr_level; /* in dBm */
 895
 896         enum ieee80211_smps_mode smps_mode;
 897
 898         struct work_struct restart_work;
 899
 900 #ifdef CONFIG_MAC80211_DEBUGFS
 901         struct local_debugfsdentries {
 902                 struct dentry *rcdir;
 903                 struct dentry *keys;
 904         } debugfs;
 905 #endif
 906
 907         /* dummy netdev for use w/ NAPI */
 908         struct net_device napi_dev;
 909
 910         struct napi_struct napi;
 911 };
 912
 913 static inline struct ieee80211_sub_if_data *
 914 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 915 {
 916         return netdev_priv(dev);
 917 }
 918
 919 /* this struct represents 802.11n's RA/TID combination */
 920 struct ieee80211_ra_tid {
 921         u8 ra[ETH_ALEN];
 922         u16 tid;
 923 };
 924
 925 /* Parsed Information Elements */
 926 struct ieee802_11_elems {
 927         u8 *ie_start;
 928         size_t total_len;
 929
 930         /* pointers to IEs */
 931         u8 *ssid;
 932         u8 *supp_rates;
 933         u8 *fh_params;
 934         u8 *ds_params;
 935         u8 *cf_params;
 936         struct ieee80211_tim_ie *tim;
 937         u8 *ibss_params;
 938         u8 *challenge;
 939         u8 *wpa;
 940         u8 *rsn;
 941         u8 *erp_info;
 942         u8 *ext_supp_rates;
 943         u8 *wmm_info;
 944         u8 *wmm_param;
 945         struct ieee80211_ht_cap *ht_cap_elem;
 946         struct ieee80211_ht_info *ht_info_elem;
 947         struct ieee80211_meshconf_ie *mesh_config;
 948         u8 *mesh_id;
 949         u8 *peer_link;
 950         u8 *preq;
 951         u8 *prep;
 952         u8 *perr;
 953         struct ieee80211_rann_ie *rann;
 954         u8 *ch_switch_elem;
 955         u8 *country_elem;
 956         u8 *pwr_constr_elem;
 957         u8 *quiet_elem;         /* first quite element */
 958         u8 *timeout_int;
 959
 960         /* length of them, respectively */
 961         u8 ssid_len;
 962         u8 supp_rates_len;
 963         u8 fh_params_len;
 964         u8 ds_params_len;
 965         u8 cf_params_len;
 966         u8 tim_len;
 967         u8 ibss_params_len;
 968         u8 challenge_len;
 969         u8 wpa_len;
 970         u8 rsn_len;
 971         u8 erp_info_len;
 972         u8 ext_supp_rates_len;
 973         u8 wmm_info_len;
 974         u8 wmm_param_len;
 975         u8 mesh_id_len;
 976         u8 peer_link_len;
 977         u8 preq_len;
 978         u8 prep_len;
 979         u8 perr_len;
 980         u8 ch_switch_elem_len;
 981         u8 country_elem_len;
 982         u8 pwr_constr_elem_len;
 983         u8 quiet_elem_len;
 984         u8 num_of_quiet_elem;   /* can be more the one */
 985         u8 timeout_int_len;
 986 };
 987
 988 static inline struct ieee80211_local *hw_to_local(
 989         struct ieee80211_hw *hw)
 990 {
 991         return container_of(hw, struct ieee80211_local, hw);
 992 }
 993
 994 static inline struct ieee80211_hw *local_to_hw(
 995         struct ieee80211_local *local)
 996 {
 997         return &local->hw;
 998 }
 999
1000
1001 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1002 {
1003         return compare_ether_addr(raddr, addr) == 0 ||
1004                is_broadcast_ether_addr(raddr);
1005 }
1006
1007
1008 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1009 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1010 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1011                                       u32 changed);
1012 void ieee80211_configure_filter(struct ieee80211_local *local);
1013 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1014
1015 extern bool ieee80211_disable_40mhz_24ghz;
1016
1017 /* STA code */
1018 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1019 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1020                        struct cfg80211_auth_request *req);
1021 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1022                         struct cfg80211_assoc_request *req);
1023 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1024                          struct cfg80211_deauth_request *req,
1025                          void *cookie);
1026 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1027                            struct cfg80211_disassoc_request *req,
1028                            void *cookie);
1029 void ieee80211_send_pspoll(struct ieee80211_local *local,
1030                            struct ieee80211_sub_if_data *sdata);
1031 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1032 int ieee80211_max_network_latency(struct notifier_block *nb,
1033                                   unsigned long data, void *dummy);
1034 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1035 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1036                                       struct ieee80211_channel_sw_ie *sw_elem,
1037                                       struct ieee80211_bss *bss,
1038                                       u64 timestamp);
1039 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1040 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1041 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1042 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1043                                   struct sk_buff *skb);
1044 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1045 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1046
1047 /* IBSS code */
1048 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1049 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1050 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1051                                         u8 *bssid, u8 *addr, u32 supp_rates,
1052                                         gfp_t gfp);
1053 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1054                         struct cfg80211_ibss_params *params);
1055 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1056 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1057 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1058 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1059 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1060                                    struct sk_buff *skb);
1061
1062 /* mesh code */
1063 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1064 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1065                                    struct sk_buff *skb);
1066
1067 /* scan/BSS handling */
1068 void ieee80211_scan_work(struct work_struct *work);
1069 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1070                                     const u8 *ssid, u8 ssid_len,
1071                                     struct ieee80211_channel *chan);
1072 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1073                            struct cfg80211_scan_request *req);
1074 void ieee80211_scan_cancel(struct ieee80211_local *local);
1075 ieee80211_rx_result
1076 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1077
1078 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1079 struct ieee80211_bss *
1080 ieee80211_bss_info_update(struct ieee80211_local *local,
1081                           struct ieee80211_rx_status *rx_status,
1082                           struct ieee80211_mgmt *mgmt,
1083                           size_t len,
1084                           struct ieee802_11_elems *elems,
1085                           struct ieee80211_channel *channel,
1086                           bool beacon);
1087 struct ieee80211_bss *
1088 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1089                      u8 *ssid, u8 ssid_len);
1090 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1091                           struct ieee80211_bss *bss);
1092
1093 /* off-channel helpers */
1094 void ieee80211_offchannel_stop_beaconing(struct ieee80211_local *local);
1095 void ieee80211_offchannel_stop_station(struct ieee80211_local *local);
1096 void ieee80211_offchannel_return(struct ieee80211_local *local,
1097                                  bool enable_beaconing);
1098
1099 /* interface handling */
1100 int ieee80211_iface_init(void);
1101 void ieee80211_iface_exit(void);
1102 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1103                      struct net_device **new_dev, enum nl80211_iftype type,
1104                      struct vif_params *params);
1105 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1106                              enum nl80211_iftype type);
1107 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1108 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1109 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1110 void ieee80211_recalc_idle(struct ieee80211_local *local);
1111
1112 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1113 {
1114         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1115 }
1116
1117 /* tx handling */
1118 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1119 void ieee80211_tx_pending(unsigned long data);
1120 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1121                                          struct net_device *dev);
1122 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1123                                        struct net_device *dev);
1124
1125 /*
1126  * radiotap header for status frames
1127  */
1128 struct ieee80211_tx_status_rtap_hdr {
1129         struct ieee80211_radiotap_header hdr;
1130         u8 rate;
1131         u8 padding_for_rate;
1132         __le16 tx_flags;
1133         u8 data_retries;
1134 } __packed;
1135
1136
1137 /* HT */
1138 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1139                                        struct ieee80211_ht_cap *ht_cap_ie,
1140                                        struct ieee80211_sta_ht_cap *ht_cap);
1141 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1142 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1143                           const u8 *da, u16 tid,
1144                           u16 initiator, u16 reason_code);
1145 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1146                                enum ieee80211_smps_mode smps, const u8 *da,
1147                                const u8 *bssid);
1148 void ieee80211_request_smps_work(struct work_struct *work);
1149
1150 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1151                                      u16 initiator, u16 reason);
1152 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1153                                     u16 initiator, u16 reason);
1154 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1155 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1156                              struct sta_info *sta,
1157                              struct ieee80211_mgmt *mgmt, size_t len);
1158 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1159                                   struct sta_info *sta,
1160                                   struct ieee80211_mgmt *mgmt,
1161                                   size_t len);
1162 void ieee80211_process_addba_request(struct ieee80211_local *local,
1163                                      struct sta_info *sta,
1164                                      struct ieee80211_mgmt *mgmt,
1165                                      size_t len);
1166
1167 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1168                                    enum ieee80211_back_parties initiator);
1169 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1170                                     enum ieee80211_back_parties initiator);
1171 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1172 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1173 void ieee80211_ba_session_work(struct work_struct *work);
1174 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1175 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1176
1177 /* Spectrum management */
1178 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1179                                        struct ieee80211_mgmt *mgmt,
1180                                        size_t len);
1181
1182 /* Suspend/resume and hw reconfiguration */
1183 int ieee80211_reconfig(struct ieee80211_local *local);
1184 void ieee80211_stop_device(struct ieee80211_local *local);
1185
1186 #ifdef CONFIG_PM
1187 int __ieee80211_suspend(struct ieee80211_hw *hw);
1188
1189 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1190 {
1191         struct ieee80211_local *local = hw_to_local(hw);
1192
1193         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1194                 "%s: resume with hardware scan still in progress\n",
1195                 wiphy_name(hw->wiphy));
1196
1197         return ieee80211_reconfig(hw_to_local(hw));
1198 }
1199 #else
1200 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1201 {
1202         return 0;
1203 }
1204
1205 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1206 {
1207         return 0;
1208 }
1209 #endif
1210
1211 /* utility functions/constants */
1212 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1213 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1214                         enum nl80211_iftype type);
1215 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1216                              int rate, int erp, int short_preamble);
1217 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1218                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1219                                      gfp_t gfp);
1220 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1221 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1222 void ieee802_11_parse_elems(u8 *start, size_t len,
1223                             struct ieee802_11_elems *elems);
1224 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1225                                struct ieee802_11_elems *elems,
1226                                u64 filter, u32 crc);
1227 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1228                               enum ieee80211_band band);
1229
1230 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1231 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1232 void ieee80211_dynamic_ps_timer(unsigned long data);
1233 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1234                              struct ieee80211_sub_if_data *sdata,
1235                              int powersave);
1236 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1237                              struct ieee80211_hdr *hdr);
1238 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1239
1240 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1241                                      enum queue_stop_reason reason);
1242 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1243                                      enum queue_stop_reason reason);
1244 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1245                                     enum queue_stop_reason reason);
1246 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1247                                     enum queue_stop_reason reason);
1248 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1249                                struct sk_buff *skb);
1250 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1251                                struct sk_buff_head *skbs);
1252
1253 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1254                          u16 transaction, u16 auth_alg,
1255                          u8 *extra, size_t extra_len, const u8 *bssid,
1256                          const u8 *key, u8 key_len, u8 key_idx);
1257 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1258                              const u8 *ie, size_t ie_len,
1259                              enum ieee80211_band band, u32 rate_mask,
1260                              u8 channel);
1261 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1262                               const u8 *ssid, size_t ssid_len,
1263                               const u8 *ie, size_t ie_len);
1264
1265 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1266                                   const size_t supp_rates_len,
1267                                   const u8 *supp_rates);
1268 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1269                             struct ieee802_11_elems *elems,
1270                             enum ieee80211_band band);
1271 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1272                              enum ieee80211_smps_mode smps_mode);
1273 void ieee80211_recalc_smps(struct ieee80211_local *local,
1274                            struct ieee80211_sub_if_data *forsdata);
1275
1276 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1277                           const u8 *ids, int n_ids, size_t offset);
1278 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1279
1280 /* internal work items */
1281 void ieee80211_work_init(struct ieee80211_local *local);
1282 void ieee80211_add_work(struct ieee80211_work *wk);
1283 void free_work(struct ieee80211_work *wk);
1284 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1285 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1286                                            struct sk_buff *skb);
1287 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1288                                    struct ieee80211_channel *chan,
1289                                    enum nl80211_channel_type channel_type,
1290                                    unsigned int duration, u64 *cookie);
1291 int ieee80211_wk_cancel_remain_on_channel(
1292         struct ieee80211_sub_if_data *sdata, u64 cookie);
1293
1294 /* channel management */
1295 enum ieee80211_chan_mode {
1296         CHAN_MODE_UNDEFINED,
1297         CHAN_MODE_HOPPING,
1298         CHAN_MODE_FIXED,
1299 };
1300
1301 enum ieee80211_chan_mode
1302 ieee80211_get_channel_mode(struct ieee80211_local *local,
1303                            struct ieee80211_sub_if_data *ignore);
1304 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1305                                 struct ieee80211_sub_if_data *sdata,
1306                                 enum nl80211_channel_type chantype);
1307
1308 #ifdef CONFIG_MAC80211_NOINLINE
1309 #define debug_noinline noinline
1310 #else
1311 #define debug_noinline
1312 #endif
1313
1314 #endif /* IEEE80211_I_H */