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 2007-2008  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/cfg80211.h>
  27 #include <net/mac80211.h>
  28 #include "key.h"
  29 #include "sta_info.h"
  30
  31 struct ieee80211_local;
  32
  33 /* Maximum number of broadcast/multicast frames to buffer when some of the
  34  * associated stations are using power saving. */
  35 #define AP_MAX_BC_BUFFER 128
  36
  37 /* Maximum number of frames buffered to all STAs, including multicast frames.
  38  * Note: increasing this limit increases the potential memory requirement. Each
  39  * frame can be up to about 2 kB long. */
  40 #define TOTAL_MAX_TX_BUFFER 512
  41
  42 /* Required encryption head and tailroom */
  43 #define IEEE80211_ENCRYPT_HEADROOM 8
  44 #define IEEE80211_ENCRYPT_TAILROOM 18
  45
  46 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  47  * reception of at least three fragmented frames. This limit can be increased
  48  * by changing this define, at the cost of slower frame reassembly and
  49  * increased memory use (about 2 kB of RAM per entry). */
  50 #define IEEE80211_FRAGMENT_MAX 4
  51
  52 /*
  53  * Time after which we ignore scan results and no longer report/use
  54  * them in any way.
  55  */
  56 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  57
  58 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  59
  60 struct ieee80211_fragment_entry {
  61         unsigned long first_frag_time;
  62         unsigned int seq;
  63         unsigned int rx_queue;
  64         unsigned int last_frag;
  65         unsigned int extra_len;
  66         struct sk_buff_head skb_list;
  67         int ccmp; /* Whether fragments were encrypted with CCMP */
  68         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  69 };
  70
  71
  72 struct ieee80211_bss {
  73         /* Yes, this is a hack */
  74         struct cfg80211_bss cbss;
  75
  76         /* don't want to look up all the time */
  77         size_t ssid_len;
  78         u8 ssid[IEEE80211_MAX_SSID_LEN];
  79
  80         u8 dtim_period;
  81
  82         bool wmm_used;
  83
  84         unsigned long last_probe_resp;
  85
  86 #ifdef CONFIG_MAC80211_MESH
  87         u8 *mesh_id;
  88         size_t mesh_id_len;
  89         u8 *mesh_cfg;
  90 #endif
  91
  92 #define IEEE80211_MAX_SUPP_RATES 32
  93         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  94         size_t supp_rates_len;
  95
  96         /*
  97          * During assocation, we save an ERP value from a probe response so
  98          * that we can feed ERP info to the driver when handling the
  99          * association completes. these fields probably won't be up-to-date
 100          * otherwise, you probably don't want to use them.
 101          */
 102         bool has_erp_value;
 103         u8 erp_value;
 104 };
 105
 106 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 107 {
 108 #ifdef CONFIG_MAC80211_MESH
 109         return bss->mesh_cfg;
 110 #endif
 111         return NULL;
 112 }
 113
 114 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 115 {
 116 #ifdef CONFIG_MAC80211_MESH
 117         return bss->mesh_id;
 118 #endif
 119         return NULL;
 120 }
 121
 122 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 123 {
 124 #ifdef CONFIG_MAC80211_MESH
 125         return bss->mesh_id_len;
 126 #endif
 127         return 0;
 128 }
 129
 130
 131 typedef unsigned __bitwise__ ieee80211_tx_result;
 132 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 133 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 134 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 135
 136 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 137 #define IEEE80211_TX_UNICAST            BIT(1)
 138 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 139
 140 struct ieee80211_tx_data {
 141         struct sk_buff *skb;
 142         struct net_device *dev;
 143         struct ieee80211_local *local;
 144         struct ieee80211_sub_if_data *sdata;
 145         struct sta_info *sta;
 146         struct ieee80211_key *key;
 147
 148         struct ieee80211_channel *channel;
 149
 150         u16 ethertype;
 151         unsigned int flags;
 152 };
 153
 154
 155 typedef unsigned __bitwise__ ieee80211_rx_result;
 156 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 157 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 158 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 159 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 160
 161 #define IEEE80211_RX_IN_SCAN            BIT(0)
 162 /* frame is destined to interface currently processed (incl. multicast frames) */
 163 #define IEEE80211_RX_RA_MATCH           BIT(1)
 164 #define IEEE80211_RX_AMSDU              BIT(2)
 165 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 166 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 167
 168 struct ieee80211_rx_data {
 169         struct sk_buff *skb;
 170         struct net_device *dev;
 171         struct ieee80211_local *local;
 172         struct ieee80211_sub_if_data *sdata;
 173         struct sta_info *sta;
 174         struct ieee80211_key *key;
 175         struct ieee80211_rx_status *status;
 176         struct ieee80211_rate *rate;
 177
 178         unsigned int flags;
 179         int sent_ps_buffered;
 180         int queue;
 181         u32 tkip_iv32;
 182         u16 tkip_iv16;
 183 };
 184
 185 struct beacon_data {
 186         u8 *head, *tail;
 187         int head_len, tail_len;
 188         int dtim_period;
 189 };
 190
 191 struct ieee80211_if_ap {
 192         struct beacon_data *beacon;
 193
 194         struct list_head vlans;
 195
 196         /* yes, this looks ugly, but guarantees that we can later use
 197          * bitmap_empty :)
 198          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 199         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 200         struct sk_buff_head ps_bc_buf;
 201         atomic_t num_sta_ps; /* number of stations in PS mode */
 202         int dtim_count;
 203 };
 204
 205 struct ieee80211_if_wds {
 206         struct sta_info *sta;
 207         u8 remote_addr[ETH_ALEN];
 208 };
 209
 210 struct ieee80211_if_vlan {
 211         struct list_head list;
 212 };
 213
 214 struct mesh_stats {
 215         __u32 fwded_frames;             /* Mesh forwarded frames */
 216         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 217         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 218         atomic_t estab_plinks;
 219 };
 220
 221 #define PREQ_Q_F_START          0x1
 222 #define PREQ_Q_F_REFRESH        0x2
 223 struct mesh_preq_queue {
 224         struct list_head list;
 225         u8 dst[ETH_ALEN];
 226         u8 flags;
 227 };
 228
 229 enum ieee80211_mgd_state {
 230         IEEE80211_MGD_STATE_IDLE,
 231         IEEE80211_MGD_STATE_PROBE,
 232         IEEE80211_MGD_STATE_AUTH,
 233         IEEE80211_MGD_STATE_ASSOC,
 234 };
 235
 236 struct ieee80211_mgd_work {
 237         struct list_head list;
 238         struct ieee80211_bss *bss;
 239         int ie_len;
 240         u8 prev_bssid[ETH_ALEN];
 241         u8 ssid[IEEE80211_MAX_SSID_LEN];
 242         u8 ssid_len;
 243         unsigned long timeout;
 244         enum ieee80211_mgd_state state;
 245         u16 auth_alg, auth_transaction;
 246
 247         int tries;
 248
 249         u8 key[WLAN_KEY_LEN_WEP104];
 250         u8 key_len, key_idx;
 251
 252         /* must be last */
 253         u8 ie[0]; /* for auth or assoc frame, not probe */
 254 };
 255
 256 /* flags used in struct ieee80211_if_managed.flags */
 257 enum ieee80211_sta_flags {
 258         IEEE80211_STA_BEACON_POLL       = BIT(0),
 259         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 260         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 261         IEEE80211_STA_WMM_ENABLED       = BIT(3),
 262         IEEE80211_STA_DISABLE_11N       = BIT(4),
 263         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
 264         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 265 };
 266
 267 /* flags for MLME request */
 268 enum ieee80211_sta_request {
 269         IEEE80211_STA_REQ_SCAN,
 270 };
 271
 272 struct ieee80211_if_managed {
 273         struct timer_list timer;
 274         struct timer_list conn_mon_timer;
 275         struct timer_list bcn_mon_timer;
 276         struct timer_list chswitch_timer;
 277         struct work_struct work;
 278         struct work_struct monitor_work;
 279         struct work_struct chswitch_work;
 280         struct work_struct beacon_loss_work;
 281
 282         unsigned long probe_timeout;
 283         int probe_send_count;
 284
 285         struct mutex mtx;
 286         struct ieee80211_bss *associated;
 287         struct list_head work_list;
 288
 289         u8 bssid[ETH_ALEN];
 290
 291         u16 aid;
 292         u16 capab;
 293
 294         struct sk_buff_head skb_queue;
 295
 296         unsigned long timers_running; /* used for quiesce/restart */
 297         bool powersave; /* powersave requested for this iface */
 298
 299         unsigned long request;
 300
 301         unsigned int flags;
 302
 303         u32 beacon_crc;
 304
 305         enum {
 306                 IEEE80211_MFP_DISABLED,
 307                 IEEE80211_MFP_OPTIONAL,
 308                 IEEE80211_MFP_REQUIRED
 309         } mfp; /* management frame protection */
 310
 311         int wmm_last_param_set;
 312 };
 313
 314 enum ieee80211_ibss_request {
 315         IEEE80211_IBSS_REQ_RUN  = 0,
 316 };
 317
 318 struct ieee80211_if_ibss {
 319         struct timer_list timer;
 320         struct work_struct work;
 321
 322         struct sk_buff_head skb_queue;
 323
 324         unsigned long request;
 325         unsigned long last_scan_completed;
 326
 327         bool timer_running;
 328
 329         bool fixed_bssid;
 330         bool fixed_channel;
 331         bool privacy;
 332
 333         u8 bssid[ETH_ALEN];
 334         u8 ssid[IEEE80211_MAX_SSID_LEN];
 335         u8 ssid_len, ie_len;
 336         u8 *ie;
 337         struct ieee80211_channel *channel;
 338
 339         unsigned long ibss_join_req;
 340         /* probe response/beacon for IBSS */
 341         struct sk_buff *presp, *skb;
 342
 343         enum {
 344                 IEEE80211_IBSS_MLME_SEARCH,
 345                 IEEE80211_IBSS_MLME_JOINED,
 346         } state;
 347 };
 348
 349 struct ieee80211_if_mesh {
 350         struct work_struct work;
 351         struct timer_list housekeeping_timer;
 352         struct timer_list mesh_path_timer;
 353         struct sk_buff_head skb_queue;
 354
 355         unsigned long timers_running;
 356
 357         bool housekeeping;
 358
 359         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 360         size_t mesh_id_len;
 361         /* Active Path Selection Protocol Identifier */
 362         u8 mesh_pp_id[4];
 363         /* Active Path Selection Metric Identifier */
 364         u8 mesh_pm_id[4];
 365         /* Congestion Control Mode Identifier */
 366         u8 mesh_cc_id[4];
 367         /* Local mesh Destination Sequence Number */
 368         u32 dsn;
 369         /* Last used PREQ ID */
 370         u32 preq_id;
 371         atomic_t mpaths;
 372         /* Timestamp of last DSN update */
 373         unsigned long last_dsn_update;
 374         /* Timestamp of last DSN sent */
 375         unsigned long last_preq;
 376         struct mesh_rmc *rmc;
 377         spinlock_t mesh_preq_queue_lock;
 378         struct mesh_preq_queue preq_queue;
 379         int preq_queue_len;
 380         struct mesh_stats mshstats;
 381         struct mesh_config mshcfg;
 382         u32 mesh_seqnum;
 383         bool accepting_plinks;
 384 };
 385
 386 #ifdef CONFIG_MAC80211_MESH
 387 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 388         do { (msh)->mshstats.name++; } while (0)
 389 #else
 390 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 391         do { } while (0)
 392 #endif
 393
 394 /**
 395  * enum ieee80211_sub_if_data_flags - virtual interface flags
 396  *
 397  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 398  * @IEEE80211_SDATA_PROMISC: interface is promisc
 399  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 400  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 401  *      associated stations and deliver multicast frames both
 402  *      back to wireless media and to the local net stack.
 403  */
 404 enum ieee80211_sub_if_data_flags {
 405         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 406         IEEE80211_SDATA_PROMISC                 = BIT(1),
 407         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 408         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 409 };
 410
 411 struct ieee80211_sub_if_data {
 412         struct list_head list;
 413
 414         struct wireless_dev wdev;
 415
 416         /* keys */
 417         struct list_head key_list;
 418
 419         struct net_device *dev;
 420         struct ieee80211_local *local;
 421
 422         unsigned int flags;
 423
 424         int drop_unencrypted;
 425
 426         /*
 427          * keep track of whether the HT opmode (stored in
 428          * vif.bss_info.ht_operation_mode) is valid.
 429          */
 430         bool ht_opmode_valid;
 431
 432         /* Fragment table for host-based reassembly */
 433         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 434         unsigned int fragment_next;
 435
 436 #define NUM_DEFAULT_KEYS 4
 437 #define NUM_DEFAULT_MGMT_KEYS 2
 438         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 439         struct ieee80211_key *default_key;
 440         struct ieee80211_key *default_mgmt_key;
 441
 442         u16 sequence_number;
 443
 444         /*
 445          * AP this belongs to: self in AP mode and
 446          * corresponding AP in VLAN mode, NULL for
 447          * all others (might be needed later in IBSS)
 448          */
 449         struct ieee80211_if_ap *bss;
 450
 451         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 452         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 453
 454         union {
 455                 struct ieee80211_if_ap ap;
 456                 struct ieee80211_if_wds wds;
 457                 struct ieee80211_if_vlan vlan;
 458                 struct ieee80211_if_managed mgd;
 459                 struct ieee80211_if_ibss ibss;
 460 #ifdef CONFIG_MAC80211_MESH
 461                 struct ieee80211_if_mesh mesh;
 462 #endif
 463                 u32 mntr_flags;
 464         } u;
 465
 466 #ifdef CONFIG_MAC80211_DEBUGFS
 467         struct dentry *debugfsdir;
 468         union {
 469                 struct {
 470                         struct dentry *drop_unencrypted;
 471                         struct dentry *bssid;
 472                         struct dentry *aid;
 473                         struct dentry *capab;
 474                         struct dentry *force_unicast_rateidx;
 475                         struct dentry *max_ratectrl_rateidx;
 476                 } sta;
 477                 struct {
 478                         struct dentry *drop_unencrypted;
 479                         struct dentry *num_sta_ps;
 480                         struct dentry *dtim_count;
 481                         struct dentry *force_unicast_rateidx;
 482                         struct dentry *max_ratectrl_rateidx;
 483                         struct dentry *num_buffered_multicast;
 484                 } ap;
 485                 struct {
 486                         struct dentry *drop_unencrypted;
 487                         struct dentry *peer;
 488                         struct dentry *force_unicast_rateidx;
 489                         struct dentry *max_ratectrl_rateidx;
 490                 } wds;
 491                 struct {
 492                         struct dentry *drop_unencrypted;
 493                         struct dentry *force_unicast_rateidx;
 494                         struct dentry *max_ratectrl_rateidx;
 495                 } vlan;
 496                 struct {
 497                         struct dentry *mode;
 498                 } monitor;
 499         } debugfs;
 500         struct {
 501                 struct dentry *default_key;
 502                 struct dentry *default_mgmt_key;
 503         } common_debugfs;
 504
 505 #ifdef CONFIG_MAC80211_MESH
 506         struct dentry *mesh_stats_dir;
 507         struct {
 508                 struct dentry *fwded_frames;
 509                 struct dentry *dropped_frames_ttl;
 510                 struct dentry *dropped_frames_no_route;
 511                 struct dentry *estab_plinks;
 512                 struct timer_list mesh_path_timer;
 513         } mesh_stats;
 514
 515         struct dentry *mesh_config_dir;
 516         struct {
 517                 struct dentry *dot11MeshRetryTimeout;
 518                 struct dentry *dot11MeshConfirmTimeout;
 519                 struct dentry *dot11MeshHoldingTimeout;
 520                 struct dentry *dot11MeshMaxRetries;
 521                 struct dentry *dot11MeshTTL;
 522                 struct dentry *auto_open_plinks;
 523                 struct dentry *dot11MeshMaxPeerLinks;
 524                 struct dentry *dot11MeshHWMPactivePathTimeout;
 525                 struct dentry *dot11MeshHWMPpreqMinInterval;
 526                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 527                 struct dentry *dot11MeshHWMPmaxPREQretries;
 528                 struct dentry *path_refresh_time;
 529                 struct dentry *min_discovery_timeout;
 530         } mesh_config;
 531 #endif
 532
 533 #endif
 534         /* must be last, dynamically sized area in this! */
 535         struct ieee80211_vif vif;
 536 };
 537
 538 static inline
 539 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 540 {
 541         return container_of(p, struct ieee80211_sub_if_data, vif);
 542 }
 543
 544 static inline void
 545 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 546                             u8 mesh_id_len, u8 *mesh_id)
 547 {
 548 #ifdef CONFIG_MAC80211_MESH
 549         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 550         ifmsh->mesh_id_len = mesh_id_len;
 551         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 552 #else
 553         WARN_ON(1);
 554 #endif
 555 }
 556
 557 enum {
 558         IEEE80211_RX_MSG        = 1,
 559         IEEE80211_TX_STATUS_MSG = 2,
 560         IEEE80211_DELBA_MSG     = 3,
 561         IEEE80211_ADDBA_MSG     = 4,
 562 };
 563
 564 enum queue_stop_reason {
 565         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 566         IEEE80211_QUEUE_STOP_REASON_PS,
 567         IEEE80211_QUEUE_STOP_REASON_CSA,
 568         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 569         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 570         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 571 };
 572
 573 /**
 574  * mac80211 scan flags - currently active scan mode
 575  *
 576  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
 577  *      well be on the operating channel
 578  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
 579  *      determine if we are on the operating channel or not
 580  * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
 581  *      gets only set in conjunction with SCAN_SW_SCANNING
 582  */
 583 enum {
 584         SCAN_SW_SCANNING,
 585         SCAN_HW_SCANNING,
 586         SCAN_OFF_CHANNEL,
 587 };
 588
 589 /**
 590  * enum mac80211_scan_state - scan state machine states
 591  *
 592  * @SCAN_DECISION: Main entry point to the scan state machine, this state
 593  *      determines if we should keep on scanning or switch back to the
 594  *      operating channel
 595  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
 596  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
 597  * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
 598  *      about us leaving the channel and stop all associated STA interfaces
 599  * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
 600  *      AP about us being back and restart all associated STA interfaces
 601  */
 602 enum mac80211_scan_state {
 603         SCAN_DECISION,
 604         SCAN_SET_CHANNEL,
 605         SCAN_SEND_PROBE,
 606         SCAN_LEAVE_OPER_CHANNEL,
 607         SCAN_ENTER_OPER_CHANNEL,
 608 };
 609
 610 struct ieee80211_local {
 611         /* embed the driver visible part.
 612          * don't cast (use the static inlines below), but we keep
 613          * it first anyway so they become a no-op */
 614         struct ieee80211_hw hw;
 615
 616         const struct ieee80211_ops *ops;
 617
 618         /*
 619          * private workqueue to mac80211. mac80211 makes this accessible
 620          * via ieee80211_queue_work()
 621          */
 622         struct workqueue_struct *workqueue;
 623
 624         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 625         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 626         spinlock_t queue_stop_reason_lock;
 627
 628         int open_count;
 629         int monitors, cooked_mntrs;
 630         /* number of interfaces with corresponding FIF_ flags */
 631         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
 632         unsigned int filter_flags; /* FIF_* */
 633         struct iw_statistics wstats;
 634
 635         /* protects the aggregated multicast list and filter calls */
 636         spinlock_t filter_lock;
 637
 638         /* aggregated multicast list */
 639         struct dev_addr_list *mc_list;
 640         int mc_count;
 641
 642         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 643
 644         /*
 645          * suspended is true if we finished all the suspend _and_ we have
 646          * not yet come up from resume. This is to be used by mac80211
 647          * to ensure driver sanity during suspend and mac80211's own
 648          * sanity. It can eventually be used for WoW as well.
 649          */
 650         bool suspended;
 651
 652         /*
 653          * quiescing is true during the suspend process _only_ to
 654          * ease timer cancelling etc.
 655          */
 656         bool quiescing;
 657
 658         int tx_headroom; /* required headroom for hardware/radiotap */
 659
 660         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 661          * added to skb_queue will be processed, but frames in
 662          * skb_queue_unreliable may be dropped if the total length of these
 663          * queues increases over the limit. */
 664 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 665         struct tasklet_struct tasklet;
 666         struct sk_buff_head skb_queue;
 667         struct sk_buff_head skb_queue_unreliable;
 668
 669         /* Station data */
 670         /*
 671          * The lock only protects the list, hash, timer and counter
 672          * against manipulation, reads are done in RCU. Additionally,
 673          * the lock protects each BSS's TIM bitmap.
 674          */
 675         spinlock_t sta_lock;
 676         unsigned long num_sta;
 677         struct list_head sta_list;
 678         struct sta_info *sta_hash[STA_HASH_SIZE];
 679         struct timer_list sta_cleanup;
 680
 681         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 682         struct tasklet_struct tx_pending_tasklet;
 683
 684         /*
 685          * This lock is used to prevent concurrent A-MPDU
 686          * session start/stop processing, this thus also
 687          * synchronises the ->ampdu_action() callback to
 688          * drivers and limits it to one at a time.
 689          */
 690         spinlock_t ampdu_lock;
 691
 692         /* number of interfaces with corresponding IFF_ flags */
 693         atomic_t iff_allmultis, iff_promiscs;
 694
 695         struct rate_control_ref *rate_ctrl;
 696
 697         struct crypto_blkcipher *wep_tx_tfm;
 698         struct crypto_blkcipher *wep_rx_tfm;
 699         u32 wep_iv;
 700
 701         /* see iface.c */
 702         struct list_head interfaces;
 703         struct mutex iflist_mtx;
 704
 705         /*
 706          * Key lock, protects sdata's key_list and sta_info's
 707          * key pointers (write access, they're RCU.)
 708          */
 709         spinlock_t key_lock;
 710
 711
 712         /* Scanning and BSS list */
 713         struct mutex scan_mtx;
 714         unsigned long scanning;
 715         struct cfg80211_ssid scan_ssid;
 716         struct cfg80211_scan_request int_scan_req;
 717         struct cfg80211_scan_request *scan_req;
 718         struct ieee80211_channel *scan_channel;
 719         const u8 *orig_ies;
 720         int orig_ies_len;
 721         int scan_channel_idx;
 722         int scan_ies_len;
 723
 724         enum mac80211_scan_state next_scan_state;
 725         struct delayed_work scan_work;
 726         struct ieee80211_sub_if_data *scan_sdata;
 727         enum nl80211_channel_type oper_channel_type;
 728         struct ieee80211_channel *oper_channel, *csa_channel;
 729
 730         /* SNMP counters */
 731         /* dot11CountersTable */
 732         u32 dot11TransmittedFragmentCount;
 733         u32 dot11MulticastTransmittedFrameCount;
 734         u32 dot11FailedCount;
 735         u32 dot11RetryCount;
 736         u32 dot11MultipleRetryCount;
 737         u32 dot11FrameDuplicateCount;
 738         u32 dot11ReceivedFragmentCount;
 739         u32 dot11MulticastReceivedFrameCount;
 740         u32 dot11TransmittedFrameCount;
 741
 742 #ifdef CONFIG_MAC80211_LEDS
 743         int tx_led_counter, rx_led_counter;
 744         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 745         char tx_led_name[32], rx_led_name[32],
 746              assoc_led_name[32], radio_led_name[32];
 747 #endif
 748
 749 #ifdef CONFIG_MAC80211_DEBUGFS
 750         struct work_struct sta_debugfs_add;
 751 #endif
 752
 753 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 754         /* TX/RX handler statistics */
 755         unsigned int tx_handlers_drop;
 756         unsigned int tx_handlers_queued;
 757         unsigned int tx_handlers_drop_unencrypted;
 758         unsigned int tx_handlers_drop_fragment;
 759         unsigned int tx_handlers_drop_wep;
 760         unsigned int tx_handlers_drop_not_assoc;
 761         unsigned int tx_handlers_drop_unauth_port;
 762         unsigned int rx_handlers_drop;
 763         unsigned int rx_handlers_queued;
 764         unsigned int rx_handlers_drop_nullfunc;
 765         unsigned int rx_handlers_drop_defrag;
 766         unsigned int rx_handlers_drop_short;
 767         unsigned int rx_handlers_drop_passive_scan;
 768         unsigned int tx_expand_skb_head;
 769         unsigned int tx_expand_skb_head_cloned;
 770         unsigned int rx_expand_skb_head;
 771         unsigned int rx_expand_skb_head2;
 772         unsigned int rx_handlers_fragments;
 773         unsigned int tx_status_drop;
 774 #define I802_DEBUG_INC(c) (c)++
 775 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 776 #define I802_DEBUG_INC(c) do { } while (0)
 777 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 778
 779
 780         int total_ps_buffered; /* total number of all buffered unicast and
 781                                 * multicast packets for power saving stations
 782                                 */
 783         int wifi_wme_noack_test;
 784         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 785
 786         bool pspolling;
 787         /*
 788          * PS can only be enabled when we have exactly one managed
 789          * interface (and monitors) in PS, this then points there.
 790          */
 791         struct ieee80211_sub_if_data *ps_sdata;
 792         struct work_struct dynamic_ps_enable_work;
 793         struct work_struct dynamic_ps_disable_work;
 794         struct timer_list dynamic_ps_timer;
 795         struct notifier_block network_latency_notifier;
 796
 797         int user_power_level; /* in dBm */
 798         int power_constr_level; /* in dBm */
 799
 800         struct work_struct restart_work;
 801
 802 #ifdef CONFIG_MAC80211_DEBUGFS
 803         struct local_debugfsdentries {
 804                 struct dentry *rcdir;
 805                 struct dentry *rcname;
 806                 struct dentry *frequency;
 807                 struct dentry *total_ps_buffered;
 808                 struct dentry *wep_iv;
 809                 struct dentry *tsf;
 810                 struct dentry *queues;
 811                 struct dentry *reset;
 812                 struct dentry *noack;
 813                 struct dentry *statistics;
 814                 struct local_debugfsdentries_statsdentries {
 815                         struct dentry *transmitted_fragment_count;
 816                         struct dentry *multicast_transmitted_frame_count;
 817                         struct dentry *failed_count;
 818                         struct dentry *retry_count;
 819                         struct dentry *multiple_retry_count;
 820                         struct dentry *frame_duplicate_count;
 821                         struct dentry *received_fragment_count;
 822                         struct dentry *multicast_received_frame_count;
 823                         struct dentry *transmitted_frame_count;
 824                         struct dentry *wep_undecryptable_count;
 825                         struct dentry *num_scans;
 826 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 827                         struct dentry *tx_handlers_drop;
 828                         struct dentry *tx_handlers_queued;
 829                         struct dentry *tx_handlers_drop_unencrypted;
 830                         struct dentry *tx_handlers_drop_fragment;
 831                         struct dentry *tx_handlers_drop_wep;
 832                         struct dentry *tx_handlers_drop_not_assoc;
 833                         struct dentry *tx_handlers_drop_unauth_port;
 834                         struct dentry *rx_handlers_drop;
 835                         struct dentry *rx_handlers_queued;
 836                         struct dentry *rx_handlers_drop_nullfunc;
 837                         struct dentry *rx_handlers_drop_defrag;
 838                         struct dentry *rx_handlers_drop_short;
 839                         struct dentry *rx_handlers_drop_passive_scan;
 840                         struct dentry *tx_expand_skb_head;
 841                         struct dentry *tx_expand_skb_head_cloned;
 842                         struct dentry *rx_expand_skb_head;
 843                         struct dentry *rx_expand_skb_head2;
 844                         struct dentry *rx_handlers_fragments;
 845                         struct dentry *tx_status_drop;
 846 #endif
 847                         struct dentry *dot11ACKFailureCount;
 848                         struct dentry *dot11RTSFailureCount;
 849                         struct dentry *dot11FCSErrorCount;
 850                         struct dentry *dot11RTSSuccessCount;
 851                 } stats;
 852                 struct dentry *stations;
 853                 struct dentry *keys;
 854         } debugfs;
 855 #endif
 856 };
 857
 858 static inline struct ieee80211_sub_if_data *
 859 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 860 {
 861         return netdev_priv(dev);
 862 }
 863
 864 /* this struct represents 802.11n's RA/TID combination */
 865 struct ieee80211_ra_tid {
 866         u8 ra[ETH_ALEN];
 867         u16 tid;
 868 };
 869
 870 /* Parsed Information Elements */
 871 struct ieee802_11_elems {
 872         u8 *ie_start;
 873         size_t total_len;
 874
 875         /* pointers to IEs */
 876         u8 *ssid;
 877         u8 *supp_rates;
 878         u8 *fh_params;
 879         u8 *ds_params;
 880         u8 *cf_params;
 881         struct ieee80211_tim_ie *tim;
 882         u8 *ibss_params;
 883         u8 *challenge;
 884         u8 *wpa;
 885         u8 *rsn;
 886         u8 *erp_info;
 887         u8 *ext_supp_rates;
 888         u8 *wmm_info;
 889         u8 *wmm_param;
 890         struct ieee80211_ht_cap *ht_cap_elem;
 891         struct ieee80211_ht_info *ht_info_elem;
 892         u8 *mesh_config;
 893         u8 *mesh_id;
 894         u8 *peer_link;
 895         u8 *preq;
 896         u8 *prep;
 897         u8 *perr;
 898         u8 *ch_switch_elem;
 899         u8 *country_elem;
 900         u8 *pwr_constr_elem;
 901         u8 *quiet_elem;         /* first quite element */
 902         u8 *timeout_int;
 903
 904         /* length of them, respectively */
 905         u8 ssid_len;
 906         u8 supp_rates_len;
 907         u8 fh_params_len;
 908         u8 ds_params_len;
 909         u8 cf_params_len;
 910         u8 tim_len;
 911         u8 ibss_params_len;
 912         u8 challenge_len;
 913         u8 wpa_len;
 914         u8 rsn_len;
 915         u8 erp_info_len;
 916         u8 ext_supp_rates_len;
 917         u8 wmm_info_len;
 918         u8 wmm_param_len;
 919         u8 mesh_config_len;
 920         u8 mesh_id_len;
 921         u8 peer_link_len;
 922         u8 preq_len;
 923         u8 prep_len;
 924         u8 perr_len;
 925         u8 ch_switch_elem_len;
 926         u8 country_elem_len;
 927         u8 pwr_constr_elem_len;
 928         u8 quiet_elem_len;
 929         u8 num_of_quiet_elem;   /* can be more the one */
 930         u8 timeout_int_len;
 931 };
 932
 933 static inline struct ieee80211_local *hw_to_local(
 934         struct ieee80211_hw *hw)
 935 {
 936         return container_of(hw, struct ieee80211_local, hw);
 937 }
 938
 939 static inline struct ieee80211_hw *local_to_hw(
 940         struct ieee80211_local *local)
 941 {
 942         return &local->hw;
 943 }
 944
 945
 946 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 947 {
 948         return compare_ether_addr(raddr, addr) == 0 ||
 949                is_broadcast_ether_addr(raddr);
 950 }
 951
 952
 953 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 954 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 955 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 956                                       u32 changed);
 957 void ieee80211_configure_filter(struct ieee80211_local *local);
 958 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 959
 960 /* STA code */
 961 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 962 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
 963                        struct cfg80211_auth_request *req);
 964 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 965                         struct cfg80211_assoc_request *req);
 966 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
 967                          struct cfg80211_deauth_request *req,
 968                          void *cookie);
 969 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
 970                            struct cfg80211_disassoc_request *req,
 971                            void *cookie);
 972 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 973                                           struct sk_buff *skb);
 974 void ieee80211_send_pspoll(struct ieee80211_local *local,
 975                            struct ieee80211_sub_if_data *sdata);
 976 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
 977 int ieee80211_max_network_latency(struct notifier_block *nb,
 978                                   unsigned long data, void *dummy);
 979 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 980                                       struct ieee80211_channel_sw_ie *sw_elem,
 981                                       struct ieee80211_bss *bss);
 982 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
 983 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
 984
 985 /* IBSS code */
 986 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 987 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 988 ieee80211_rx_result
 989 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 990 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 991                                         u8 *bssid, u8 *addr, u32 supp_rates);
 992 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 993                         struct cfg80211_ibss_params *params);
 994 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
 995 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
 996 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
 997
 998 /* scan/BSS handling */
 999 void ieee80211_scan_work(struct work_struct *work);
1000 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1001                                     const u8 *ssid, u8 ssid_len);
1002 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1003                            struct cfg80211_scan_request *req);
1004 void ieee80211_scan_cancel(struct ieee80211_local *local);
1005 ieee80211_rx_result
1006 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1007
1008 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1009 struct ieee80211_bss *
1010 ieee80211_bss_info_update(struct ieee80211_local *local,
1011                           struct ieee80211_rx_status *rx_status,
1012                           struct ieee80211_mgmt *mgmt,
1013                           size_t len,
1014                           struct ieee802_11_elems *elems,
1015                           struct ieee80211_channel *channel,
1016                           bool beacon);
1017 struct ieee80211_bss *
1018 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1019                      u8 *ssid, u8 ssid_len);
1020 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1021                           struct ieee80211_bss *bss);
1022
1023 /* interface handling */
1024 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1025                      struct net_device **new_dev, enum nl80211_iftype type,
1026                      struct vif_params *params);
1027 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1028                              enum nl80211_iftype type);
1029 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1030 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1031 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1032 void ieee80211_recalc_idle(struct ieee80211_local *local);
1033
1034 /* tx handling */
1035 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1036 void ieee80211_tx_pending(unsigned long data);
1037 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
1038 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
1039
1040 /* HT */
1041 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1042                                        struct ieee80211_ht_cap *ht_cap_ie,
1043                                        struct ieee80211_sta_ht_cap *ht_cap);
1044 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1045 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1046                           const u8 *da, u16 tid,
1047                           u16 initiator, u16 reason_code);
1048
1049 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
1050                                 u16 tid, u16 initiator, u16 reason);
1051 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1052                                     u16 initiator, u16 reason);
1053 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1054 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1055                              struct sta_info *sta,
1056                              struct ieee80211_mgmt *mgmt, size_t len);
1057 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1058                                   struct sta_info *sta,
1059                                   struct ieee80211_mgmt *mgmt,
1060                                   size_t len);
1061 void ieee80211_process_addba_request(struct ieee80211_local *local,
1062                                      struct sta_info *sta,
1063                                      struct ieee80211_mgmt *mgmt,
1064                                      size_t len);
1065
1066 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1067                                    enum ieee80211_back_parties initiator);
1068
1069 /* Spectrum management */
1070 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1071                                        struct ieee80211_mgmt *mgmt,
1072                                        size_t len);
1073
1074 /* Suspend/resume and hw reconfiguration */
1075 int ieee80211_reconfig(struct ieee80211_local *local);
1076
1077 #ifdef CONFIG_PM
1078 int __ieee80211_suspend(struct ieee80211_hw *hw);
1079
1080 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1081 {
1082         return ieee80211_reconfig(hw_to_local(hw));
1083 }
1084 #else
1085 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1086 {
1087         return 0;
1088 }
1089
1090 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1091 {
1092         return 0;
1093 }
1094 #endif
1095
1096 /* utility functions/constants */
1097 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1098 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1099                         enum nl80211_iftype type);
1100 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1101                              int rate, int erp, int short_preamble);
1102 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1103                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1104                                      gfp_t gfp);
1105 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1106 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1107                       int encrypt);
1108 void ieee802_11_parse_elems(u8 *start, size_t len,
1109                             struct ieee802_11_elems *elems);
1110 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1111                                struct ieee802_11_elems *elems,
1112                                u64 filter, u32 crc);
1113 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1114                               enum ieee80211_band band);
1115
1116 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1117 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1118 void ieee80211_dynamic_ps_timer(unsigned long data);
1119 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1120                              struct ieee80211_sub_if_data *sdata,
1121                              int powersave);
1122 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1123                              struct ieee80211_hdr *hdr);
1124 void ieee80211_beacon_loss_work(struct work_struct *work);
1125
1126 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1127                                      enum queue_stop_reason reason);
1128 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1129                                      enum queue_stop_reason reason);
1130 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1131                                     enum queue_stop_reason reason);
1132 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1133                                     enum queue_stop_reason reason);
1134 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1135                                struct sk_buff *skb);
1136 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1137                                struct sk_buff_head *skbs);
1138
1139 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1140                          u16 transaction, u16 auth_alg,
1141                          u8 *extra, size_t extra_len, const u8 *bssid,
1142                          const u8 *key, u8 key_len, u8 key_idx);
1143 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1144                              const u8 *ie, size_t ie_len);
1145 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1146                               const u8 *ssid, size_t ssid_len,
1147                               const u8 *ie, size_t ie_len);
1148
1149 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1150                                   const size_t supp_rates_len,
1151                                   const u8 *supp_rates);
1152 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1153                             struct ieee802_11_elems *elems,
1154                             enum ieee80211_band band);
1155
1156 #ifdef CONFIG_MAC80211_NOINLINE
1157 #define debug_noinline noinline
1158 #else
1159 #define debug_noinline
1160 #endif
1161
1162 #endif /* IEEE80211_I_H */