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/wireless.h>
  28 #include <net/iw_handler.h>
  29 #include <net/mac80211.h>
  30 #include "key.h"
  31 #include "sta_info.h"
  32
  33 struct ieee80211_local;
  34
  35 /* Maximum number of broadcast/multicast frames to buffer when some of the
  36  * associated stations are using power saving. */
  37 #define AP_MAX_BC_BUFFER 128
  38
  39 /* Maximum number of frames buffered to all STAs, including multicast frames.
  40  * Note: increasing this limit increases the potential memory requirement. Each
  41  * frame can be up to about 2 kB long. */
  42 #define TOTAL_MAX_TX_BUFFER 512
  43
  44 /* Required encryption head and tailroom */
  45 #define IEEE80211_ENCRYPT_HEADROOM 8
  46 #define IEEE80211_ENCRYPT_TAILROOM 18
  47
  48 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  49  * reception of at least three fragmented frames. This limit can be increased
  50  * by changing this define, at the cost of slower frame reassembly and
  51  * increased memory use (about 2 kB of RAM per entry). */
  52 #define IEEE80211_FRAGMENT_MAX 4
  53
  54 /*
  55  * Time after which we ignore scan results and no longer report/use
  56  * them in any way.
  57  */
  58 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  59
  60 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  61
  62 struct ieee80211_fragment_entry {
  63         unsigned long first_frag_time;
  64         unsigned int seq;
  65         unsigned int rx_queue;
  66         unsigned int last_frag;
  67         unsigned int extra_len;
  68         struct sk_buff_head skb_list;
  69         int ccmp; /* Whether fragments were encrypted with CCMP */
  70         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  71 };
  72
  73
  74 struct ieee80211_bss {
  75         /* Yes, this is a hack */
  76         struct cfg80211_bss cbss;
  77
  78         /* don't want to look up all the time */
  79         size_t ssid_len;
  80         u8 ssid[IEEE80211_MAX_SSID_LEN];
  81
  82         u8 dtim_period;
  83
  84         bool wmm_used;
  85
  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 net_device *dev;
 145         struct ieee80211_local *local;
 146         struct ieee80211_sub_if_data *sdata;
 147         struct sta_info *sta;
 148         struct ieee80211_key *key;
 149
 150         struct ieee80211_channel *channel;
 151
 152         u16 ethertype;
 153         unsigned int flags;
 154 };
 155
 156
 157 typedef unsigned __bitwise__ ieee80211_rx_result;
 158 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 159 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 160 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 161 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 162
 163 #define IEEE80211_RX_IN_SCAN            BIT(0)
 164 /* frame is destined to interface currently processed (incl. multicast frames) */
 165 #define IEEE80211_RX_RA_MATCH           BIT(1)
 166 #define IEEE80211_RX_AMSDU              BIT(2)
 167 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 168 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 169
 170 struct ieee80211_rx_data {
 171         struct sk_buff *skb;
 172         struct net_device *dev;
 173         struct ieee80211_local *local;
 174         struct ieee80211_sub_if_data *sdata;
 175         struct sta_info *sta;
 176         struct ieee80211_key *key;
 177         struct ieee80211_rx_status *status;
 178         struct ieee80211_rate *rate;
 179
 180         unsigned int flags;
 181         int sent_ps_buffered;
 182         int queue;
 183         u32 tkip_iv32;
 184         u16 tkip_iv16;
 185 };
 186
 187 struct beacon_data {
 188         u8 *head, *tail;
 189         int head_len, tail_len;
 190         int dtim_period;
 191 };
 192
 193 struct ieee80211_if_ap {
 194         struct beacon_data *beacon;
 195
 196         struct list_head vlans;
 197
 198         /* yes, this looks ugly, but guarantees that we can later use
 199          * bitmap_empty :)
 200          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 201         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 202         struct sk_buff_head ps_bc_buf;
 203         atomic_t num_sta_ps; /* number of stations in PS mode */
 204         int dtim_count;
 205 };
 206
 207 struct ieee80211_if_wds {
 208         struct sta_info *sta;
 209         u8 remote_addr[ETH_ALEN];
 210 };
 211
 212 struct ieee80211_if_vlan {
 213         struct list_head list;
 214 };
 215
 216 struct mesh_stats {
 217         __u32 fwded_frames;             /* Mesh forwarded frames */
 218         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 219         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 220         atomic_t estab_plinks;
 221 };
 222
 223 #define PREQ_Q_F_START          0x1
 224 #define PREQ_Q_F_REFRESH        0x2
 225 struct mesh_preq_queue {
 226         struct list_head list;
 227         u8 dst[ETH_ALEN];
 228         u8 flags;
 229 };
 230
 231 /* flags used in struct ieee80211_if_managed.flags */
 232 #define IEEE80211_STA_SSID_SET          BIT(0)
 233 #define IEEE80211_STA_BSSID_SET         BIT(1)
 234 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 235 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 236 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 237 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 238 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 239 /* hole at 7, please re-use */
 240 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 241 /* hole at 9, please re-use */
 242 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 243 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 244 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 245 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 246 #define IEEE80211_STA_TKIP_WEP_USED     BIT(14)
 247 #define IEEE80211_STA_CSA_RECEIVED      BIT(15)
 248 #define IEEE80211_STA_MFP_ENABLED       BIT(16)
 249 #define IEEE80211_STA_EXT_SME           BIT(17)
 250 /* flags for MLME request */
 251 #define IEEE80211_STA_REQ_SCAN 0
 252 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 253 #define IEEE80211_STA_REQ_AUTH 2
 254 #define IEEE80211_STA_REQ_RUN  3
 255
 256 /* bitfield of allowed auth algs */
 257 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 258 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 259 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 260 #define IEEE80211_AUTH_ALG_FT BIT(3)
 261
 262 struct ieee80211_if_managed {
 263         struct timer_list timer;
 264         struct timer_list chswitch_timer;
 265         struct work_struct work;
 266         struct work_struct chswitch_work;
 267         struct work_struct beacon_loss_work;
 268
 269         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 270
 271         u8 ssid[IEEE80211_MAX_SSID_LEN];
 272         size_t ssid_len;
 273
 274         enum {
 275                 IEEE80211_STA_MLME_DISABLED,
 276                 IEEE80211_STA_MLME_DIRECT_PROBE,
 277                 IEEE80211_STA_MLME_AUTHENTICATE,
 278                 IEEE80211_STA_MLME_ASSOCIATE,
 279                 IEEE80211_STA_MLME_ASSOCIATED,
 280         } state;
 281
 282         u16 aid;
 283         u16 ap_capab, capab;
 284         u8 *extra_ie; /* to be added to the end of AssocReq */
 285         size_t extra_ie_len;
 286
 287         /* The last AssocReq/Resp IEs */
 288         u8 *assocreq_ies, *assocresp_ies;
 289         size_t assocreq_ies_len, assocresp_ies_len;
 290
 291         struct sk_buff_head skb_queue;
 292
 293         int assoc_scan_tries; /* number of scans done pre-association */
 294         int direct_probe_tries; /* retries for direct probes */
 295         int auth_tries; /* retries for auth req */
 296         int assoc_tries; /* retries for assoc req */
 297
 298         unsigned long request;
 299
 300         unsigned long last_probe;
 301         unsigned long last_beacon;
 302
 303         unsigned int flags;
 304
 305         unsigned int auth_algs; /* bitfield of allowed auth algs */
 306         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 307         int auth_transaction;
 308
 309         enum {
 310                 IEEE80211_MFP_DISABLED,
 311                 IEEE80211_MFP_OPTIONAL,
 312                 IEEE80211_MFP_REQUIRED
 313         } mfp; /* management frame protection */
 314
 315         int wmm_last_param_set;
 316
 317         /* Extra IE data for management frames */
 318         u8 *sme_auth_ie;
 319         size_t sme_auth_ie_len;
 320 };
 321
 322 enum ieee80211_ibss_flags {
 323         IEEE80211_IBSS_AUTO_CHANNEL_SEL         = BIT(0),
 324         IEEE80211_IBSS_AUTO_BSSID_SEL           = BIT(1),
 325         IEEE80211_IBSS_BSSID_SET                = BIT(2),
 326         IEEE80211_IBSS_PREV_BSSID_SET           = BIT(3),
 327         IEEE80211_IBSS_SSID_SET                 = BIT(4),
 328 };
 329
 330 enum ieee80211_ibss_request {
 331         IEEE80211_IBSS_REQ_RUN  = 0,
 332 };
 333
 334 struct ieee80211_if_ibss {
 335         struct timer_list timer;
 336         struct work_struct work;
 337
 338         struct sk_buff_head skb_queue;
 339
 340         u8 ssid[IEEE80211_MAX_SSID_LEN];
 341         u8 ssid_len;
 342
 343         u32 flags;
 344
 345         u8 bssid[ETH_ALEN];
 346
 347         unsigned long request;
 348
 349         unsigned long ibss_join_req;
 350         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 351
 352         enum {
 353                 IEEE80211_IBSS_MLME_SEARCH,
 354                 IEEE80211_IBSS_MLME_JOINED,
 355         } state;
 356 };
 357
 358 struct ieee80211_if_mesh {
 359         struct work_struct work;
 360         struct timer_list housekeeping_timer;
 361         struct timer_list mesh_path_timer;
 362         struct sk_buff_head skb_queue;
 363
 364         bool housekeeping;
 365
 366         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 367         size_t mesh_id_len;
 368         /* Active Path Selection Protocol Identifier */
 369         u8 mesh_pp_id[4];
 370         /* Active Path Selection Metric Identifier */
 371         u8 mesh_pm_id[4];
 372         /* Congestion Control Mode Identifier */
 373         u8 mesh_cc_id[4];
 374         /* Local mesh Destination Sequence Number */
 375         u32 dsn;
 376         /* Last used PREQ ID */
 377         u32 preq_id;
 378         atomic_t mpaths;
 379         /* Timestamp of last DSN update */
 380         unsigned long last_dsn_update;
 381         /* Timestamp of last DSN sent */
 382         unsigned long last_preq;
 383         struct mesh_rmc *rmc;
 384         spinlock_t mesh_preq_queue_lock;
 385         struct mesh_preq_queue preq_queue;
 386         int preq_queue_len;
 387         struct mesh_stats mshstats;
 388         struct mesh_config mshcfg;
 389         u32 mesh_seqnum;
 390         bool accepting_plinks;
 391 };
 392
 393 #ifdef CONFIG_MAC80211_MESH
 394 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 395         do { (msh)->mshstats.name++; } while (0)
 396 #else
 397 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 398         do { } while (0)
 399 #endif
 400
 401 /**
 402  * enum ieee80211_sub_if_data_flags - virtual interface flags
 403  *
 404  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 405  * @IEEE80211_SDATA_PROMISC: interface is promisc
 406  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 407  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 408  *      associated stations and deliver multicast frames both
 409  *      back to wireless media and to the local net stack.
 410  */
 411 enum ieee80211_sub_if_data_flags {
 412         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 413         IEEE80211_SDATA_PROMISC                 = BIT(1),
 414         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 415         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 416 };
 417
 418 struct ieee80211_sub_if_data {
 419         struct list_head list;
 420
 421         struct wireless_dev wdev;
 422
 423         /* keys */
 424         struct list_head key_list;
 425
 426         struct net_device *dev;
 427         struct ieee80211_local *local;
 428
 429         unsigned int flags;
 430
 431         int drop_unencrypted;
 432
 433         /* Fragment table for host-based reassembly */
 434         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 435         unsigned int fragment_next;
 436
 437 #define NUM_DEFAULT_KEYS 4
 438 #define NUM_DEFAULT_MGMT_KEYS 2
 439         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 440         struct ieee80211_key *default_key;
 441         struct ieee80211_key *default_mgmt_key;
 442
 443         u16 sequence_number;
 444
 445         /*
 446          * AP this belongs to: self in AP mode and
 447          * corresponding AP in VLAN mode, NULL for
 448          * all others (might be needed later in IBSS)
 449          */
 450         struct ieee80211_if_ap *bss;
 451
 452         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 453         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 454
 455         union {
 456                 struct ieee80211_if_ap ap;
 457                 struct ieee80211_if_wds wds;
 458                 struct ieee80211_if_vlan vlan;
 459                 struct ieee80211_if_managed mgd;
 460                 struct ieee80211_if_ibss ibss;
 461 #ifdef CONFIG_MAC80211_MESH
 462                 struct ieee80211_if_mesh mesh;
 463 #endif
 464                 u32 mntr_flags;
 465         } u;
 466
 467 #ifdef CONFIG_MAC80211_DEBUGFS
 468         struct dentry *debugfsdir;
 469         union {
 470                 struct {
 471                         struct dentry *drop_unencrypted;
 472                         struct dentry *state;
 473                         struct dentry *bssid;
 474                         struct dentry *prev_bssid;
 475                         struct dentry *ssid_len;
 476                         struct dentry *aid;
 477                         struct dentry *ap_capab;
 478                         struct dentry *capab;
 479                         struct dentry *extra_ie_len;
 480                         struct dentry *auth_tries;
 481                         struct dentry *assoc_tries;
 482                         struct dentry *auth_algs;
 483                         struct dentry *auth_alg;
 484                         struct dentry *auth_transaction;
 485                         struct dentry *flags;
 486                         struct dentry *force_unicast_rateidx;
 487                         struct dentry *max_ratectrl_rateidx;
 488                 } sta;
 489                 struct {
 490                         struct dentry *drop_unencrypted;
 491                         struct dentry *num_sta_ps;
 492                         struct dentry *dtim_count;
 493                         struct dentry *force_unicast_rateidx;
 494                         struct dentry *max_ratectrl_rateidx;
 495                         struct dentry *num_buffered_multicast;
 496                 } ap;
 497                 struct {
 498                         struct dentry *drop_unencrypted;
 499                         struct dentry *peer;
 500                         struct dentry *force_unicast_rateidx;
 501                         struct dentry *max_ratectrl_rateidx;
 502                 } wds;
 503                 struct {
 504                         struct dentry *drop_unencrypted;
 505                         struct dentry *force_unicast_rateidx;
 506                         struct dentry *max_ratectrl_rateidx;
 507                 } vlan;
 508                 struct {
 509                         struct dentry *mode;
 510                 } monitor;
 511         } debugfs;
 512         struct {
 513                 struct dentry *default_key;
 514                 struct dentry *default_mgmt_key;
 515         } common_debugfs;
 516
 517 #ifdef CONFIG_MAC80211_MESH
 518         struct dentry *mesh_stats_dir;
 519         struct {
 520                 struct dentry *fwded_frames;
 521                 struct dentry *dropped_frames_ttl;
 522                 struct dentry *dropped_frames_no_route;
 523                 struct dentry *estab_plinks;
 524                 struct timer_list mesh_path_timer;
 525         } mesh_stats;
 526
 527         struct dentry *mesh_config_dir;
 528         struct {
 529                 struct dentry *dot11MeshRetryTimeout;
 530                 struct dentry *dot11MeshConfirmTimeout;
 531                 struct dentry *dot11MeshHoldingTimeout;
 532                 struct dentry *dot11MeshMaxRetries;
 533                 struct dentry *dot11MeshTTL;
 534                 struct dentry *auto_open_plinks;
 535                 struct dentry *dot11MeshMaxPeerLinks;
 536                 struct dentry *dot11MeshHWMPactivePathTimeout;
 537                 struct dentry *dot11MeshHWMPpreqMinInterval;
 538                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 539                 struct dentry *dot11MeshHWMPmaxPREQretries;
 540                 struct dentry *path_refresh_time;
 541                 struct dentry *min_discovery_timeout;
 542         } mesh_config;
 543 #endif
 544
 545 #endif
 546         /* must be last, dynamically sized area in this! */
 547         struct ieee80211_vif vif;
 548 };
 549
 550 static inline
 551 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 552 {
 553         return container_of(p, struct ieee80211_sub_if_data, vif);
 554 }
 555
 556 static inline void
 557 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 558                             u8 mesh_id_len, u8 *mesh_id)
 559 {
 560 #ifdef CONFIG_MAC80211_MESH
 561         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 562         ifmsh->mesh_id_len = mesh_id_len;
 563         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 564 #else
 565         WARN_ON(1);
 566 #endif
 567 }
 568
 569 enum {
 570         IEEE80211_RX_MSG        = 1,
 571         IEEE80211_TX_STATUS_MSG = 2,
 572         IEEE80211_DELBA_MSG     = 3,
 573         IEEE80211_ADDBA_MSG     = 4,
 574 };
 575
 576 enum queue_stop_reason {
 577         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 578         IEEE80211_QUEUE_STOP_REASON_PS,
 579         IEEE80211_QUEUE_STOP_REASON_CSA,
 580         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
 581         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 582         IEEE80211_QUEUE_STOP_REASON_PENDING,
 583 };
 584
 585 struct ieee80211_master_priv {
 586         struct ieee80211_local *local;
 587 };
 588
 589 struct ieee80211_local {
 590         /* embed the driver visible part.
 591          * don't cast (use the static inlines below), but we keep
 592          * it first anyway so they become a no-op */
 593         struct ieee80211_hw hw;
 594
 595         const struct ieee80211_ops *ops;
 596
 597         /* AC queue corresponding to each AMPDU queue */
 598         s8 ampdu_ac_queue[IEEE80211_MAX_AMPDU_QUEUES];
 599         unsigned int amdpu_ac_stop_refcnt[IEEE80211_MAX_AMPDU_QUEUES];
 600
 601         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES +
 602                                          IEEE80211_MAX_AMPDU_QUEUES];
 603         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
 604         spinlock_t queue_stop_reason_lock;
 605
 606         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 607         int open_count;
 608         int monitors, cooked_mntrs;
 609         /* number of interfaces with corresponding FIF_ flags */
 610         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 611         unsigned int filter_flags; /* FIF_* */
 612         struct iw_statistics wstats;
 613         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 614         int tx_headroom; /* required headroom for hardware/radiotap */
 615
 616         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 617          * added to skb_queue will be processed, but frames in
 618          * skb_queue_unreliable may be dropped if the total length of these
 619          * queues increases over the limit. */
 620 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 621         struct tasklet_struct tasklet;
 622         struct sk_buff_head skb_queue;
 623         struct sk_buff_head skb_queue_unreliable;
 624
 625         /* Station data */
 626         /*
 627          * The lock only protects the list, hash, timer and counter
 628          * against manipulation, reads are done in RCU. Additionally,
 629          * the lock protects each BSS's TIM bitmap.
 630          */
 631         spinlock_t sta_lock;
 632         unsigned long num_sta;
 633         struct list_head sta_list;
 634         struct list_head sta_flush_list;
 635         struct work_struct sta_flush_work;
 636         struct sta_info *sta_hash[STA_HASH_SIZE];
 637         struct timer_list sta_cleanup;
 638
 639         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
 640         struct tasklet_struct tx_pending_tasklet;
 641
 642         /* number of interfaces with corresponding IFF_ flags */
 643         atomic_t iff_allmultis, iff_promiscs;
 644
 645         struct rate_control_ref *rate_ctrl;
 646
 647         int rts_threshold;
 648         int fragmentation_threshold;
 649
 650         struct crypto_blkcipher *wep_tx_tfm;
 651         struct crypto_blkcipher *wep_rx_tfm;
 652         u32 wep_iv;
 653
 654         /* see iface.c */
 655         struct list_head interfaces;
 656         struct mutex iflist_mtx;
 657
 658         /*
 659          * Key lock, protects sdata's key_list and sta_info's
 660          * key pointers (write access, they're RCU.)
 661          */
 662         spinlock_t key_lock;
 663
 664
 665         /* Scanning and BSS list */
 666         bool sw_scanning, hw_scanning;
 667         struct cfg80211_ssid scan_ssid;
 668         struct cfg80211_scan_request int_scan_req;
 669         struct cfg80211_scan_request *scan_req;
 670         struct ieee80211_channel *scan_channel;
 671         int scan_channel_idx;
 672
 673         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 674         unsigned long last_scan_completed;
 675         struct delayed_work scan_work;
 676         struct ieee80211_sub_if_data *scan_sdata;
 677         enum nl80211_channel_type oper_channel_type;
 678         struct ieee80211_channel *oper_channel, *csa_channel;
 679
 680         /* SNMP counters */
 681         /* dot11CountersTable */
 682         u32 dot11TransmittedFragmentCount;
 683         u32 dot11MulticastTransmittedFrameCount;
 684         u32 dot11FailedCount;
 685         u32 dot11RetryCount;
 686         u32 dot11MultipleRetryCount;
 687         u32 dot11FrameDuplicateCount;
 688         u32 dot11ReceivedFragmentCount;
 689         u32 dot11MulticastReceivedFrameCount;
 690         u32 dot11TransmittedFrameCount;
 691
 692 #ifdef CONFIG_MAC80211_LEDS
 693         int tx_led_counter, rx_led_counter;
 694         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 695         char tx_led_name[32], rx_led_name[32],
 696              assoc_led_name[32], radio_led_name[32];
 697 #endif
 698
 699 #ifdef CONFIG_MAC80211_DEBUGFS
 700         struct work_struct sta_debugfs_add;
 701 #endif
 702
 703 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 704         /* TX/RX handler statistics */
 705         unsigned int tx_handlers_drop;
 706         unsigned int tx_handlers_queued;
 707         unsigned int tx_handlers_drop_unencrypted;
 708         unsigned int tx_handlers_drop_fragment;
 709         unsigned int tx_handlers_drop_wep;
 710         unsigned int tx_handlers_drop_not_assoc;
 711         unsigned int tx_handlers_drop_unauth_port;
 712         unsigned int rx_handlers_drop;
 713         unsigned int rx_handlers_queued;
 714         unsigned int rx_handlers_drop_nullfunc;
 715         unsigned int rx_handlers_drop_defrag;
 716         unsigned int rx_handlers_drop_short;
 717         unsigned int rx_handlers_drop_passive_scan;
 718         unsigned int tx_expand_skb_head;
 719         unsigned int tx_expand_skb_head_cloned;
 720         unsigned int rx_expand_skb_head;
 721         unsigned int rx_expand_skb_head2;
 722         unsigned int rx_handlers_fragments;
 723         unsigned int tx_status_drop;
 724 #define I802_DEBUG_INC(c) (c)++
 725 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 726 #define I802_DEBUG_INC(c) do { } while (0)
 727 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 728
 729
 730         int total_ps_buffered; /* total number of all buffered unicast and
 731                                 * multicast packets for power saving stations
 732                                 */
 733         int wifi_wme_noack_test;
 734         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 735
 736         bool powersave;
 737         bool pspolling;
 738         struct work_struct dynamic_ps_enable_work;
 739         struct work_struct dynamic_ps_disable_work;
 740         struct timer_list dynamic_ps_timer;
 741
 742         int user_power_level; /* in dBm */
 743         int power_constr_level; /* in dBm */
 744
 745 #ifdef CONFIG_MAC80211_DEBUGFS
 746         struct local_debugfsdentries {
 747                 struct dentry *rcdir;
 748                 struct dentry *rcname;
 749                 struct dentry *frequency;
 750                 struct dentry *rts_threshold;
 751                 struct dentry *fragmentation_threshold;
 752                 struct dentry *short_retry_limit;
 753                 struct dentry *long_retry_limit;
 754                 struct dentry *total_ps_buffered;
 755                 struct dentry *wep_iv;
 756                 struct dentry *tsf;
 757                 struct dentry *reset;
 758                 struct dentry *statistics;
 759                 struct local_debugfsdentries_statsdentries {
 760                         struct dentry *transmitted_fragment_count;
 761                         struct dentry *multicast_transmitted_frame_count;
 762                         struct dentry *failed_count;
 763                         struct dentry *retry_count;
 764                         struct dentry *multiple_retry_count;
 765                         struct dentry *frame_duplicate_count;
 766                         struct dentry *received_fragment_count;
 767                         struct dentry *multicast_received_frame_count;
 768                         struct dentry *transmitted_frame_count;
 769                         struct dentry *wep_undecryptable_count;
 770                         struct dentry *num_scans;
 771 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 772                         struct dentry *tx_handlers_drop;
 773                         struct dentry *tx_handlers_queued;
 774                         struct dentry *tx_handlers_drop_unencrypted;
 775                         struct dentry *tx_handlers_drop_fragment;
 776                         struct dentry *tx_handlers_drop_wep;
 777                         struct dentry *tx_handlers_drop_not_assoc;
 778                         struct dentry *tx_handlers_drop_unauth_port;
 779                         struct dentry *rx_handlers_drop;
 780                         struct dentry *rx_handlers_queued;
 781                         struct dentry *rx_handlers_drop_nullfunc;
 782                         struct dentry *rx_handlers_drop_defrag;
 783                         struct dentry *rx_handlers_drop_short;
 784                         struct dentry *rx_handlers_drop_passive_scan;
 785                         struct dentry *tx_expand_skb_head;
 786                         struct dentry *tx_expand_skb_head_cloned;
 787                         struct dentry *rx_expand_skb_head;
 788                         struct dentry *rx_expand_skb_head2;
 789                         struct dentry *rx_handlers_fragments;
 790                         struct dentry *tx_status_drop;
 791 #endif
 792                         struct dentry *dot11ACKFailureCount;
 793                         struct dentry *dot11RTSFailureCount;
 794                         struct dentry *dot11FCSErrorCount;
 795                         struct dentry *dot11RTSSuccessCount;
 796                 } stats;
 797                 struct dentry *stations;
 798                 struct dentry *keys;
 799         } debugfs;
 800 #endif
 801 };
 802
 803 static inline struct ieee80211_sub_if_data *
 804 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 805 {
 806         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 807
 808         BUG_ON(!local || local->mdev == dev);
 809
 810         return netdev_priv(dev);
 811 }
 812
 813 /* this struct represents 802.11n's RA/TID combination */
 814 struct ieee80211_ra_tid {
 815         u8 ra[ETH_ALEN];
 816         u16 tid;
 817 };
 818
 819 /* Parsed Information Elements */
 820 struct ieee802_11_elems {
 821         u8 *ie_start;
 822         size_t total_len;
 823
 824         /* pointers to IEs */
 825         u8 *ssid;
 826         u8 *supp_rates;
 827         u8 *fh_params;
 828         u8 *ds_params;
 829         u8 *cf_params;
 830         u8 *tim;
 831         u8 *ibss_params;
 832         u8 *challenge;
 833         u8 *wpa;
 834         u8 *rsn;
 835         u8 *erp_info;
 836         u8 *ext_supp_rates;
 837         u8 *wmm_info;
 838         u8 *wmm_param;
 839         struct ieee80211_ht_cap *ht_cap_elem;
 840         struct ieee80211_ht_info *ht_info_elem;
 841         u8 *mesh_config;
 842         u8 *mesh_id;
 843         u8 *peer_link;
 844         u8 *preq;
 845         u8 *prep;
 846         u8 *perr;
 847         u8 *ch_switch_elem;
 848         u8 *country_elem;
 849         u8 *pwr_constr_elem;
 850         u8 *quiet_elem;         /* first quite element */
 851         u8 *timeout_int;
 852
 853         /* length of them, respectively */
 854         u8 ssid_len;
 855         u8 supp_rates_len;
 856         u8 fh_params_len;
 857         u8 ds_params_len;
 858         u8 cf_params_len;
 859         u8 tim_len;
 860         u8 ibss_params_len;
 861         u8 challenge_len;
 862         u8 wpa_len;
 863         u8 rsn_len;
 864         u8 erp_info_len;
 865         u8 ext_supp_rates_len;
 866         u8 wmm_info_len;
 867         u8 wmm_param_len;
 868         u8 mesh_config_len;
 869         u8 mesh_id_len;
 870         u8 peer_link_len;
 871         u8 preq_len;
 872         u8 prep_len;
 873         u8 perr_len;
 874         u8 ch_switch_elem_len;
 875         u8 country_elem_len;
 876         u8 pwr_constr_elem_len;
 877         u8 quiet_elem_len;
 878         u8 num_of_quiet_elem;   /* can be more the one */
 879         u8 timeout_int_len;
 880 };
 881
 882 static inline struct ieee80211_local *hw_to_local(
 883         struct ieee80211_hw *hw)
 884 {
 885         return container_of(hw, struct ieee80211_local, hw);
 886 }
 887
 888 static inline struct ieee80211_hw *local_to_hw(
 889         struct ieee80211_local *local)
 890 {
 891         return &local->hw;
 892 }
 893
 894
 895 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 896 {
 897         return compare_ether_addr(raddr, addr) == 0 ||
 898                is_broadcast_ether_addr(raddr);
 899 }
 900
 901
 902 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 903 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 904 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 905 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 906                                       u32 changed);
 907 void ieee80211_configure_filter(struct ieee80211_local *local);
 908 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 909
 910 /* wireless extensions */
 911 extern const struct iw_handler_def ieee80211_iw_handler_def;
 912
 913 /* STA code */
 914 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 915 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 916                                           struct sk_buff *skb,
 917                                           struct ieee80211_rx_status *rx_status);
 918 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata);
 919 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 920 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 921 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 922 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata);
 923 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 924 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 925 void ieee80211_send_pspoll(struct ieee80211_local *local,
 926                            struct ieee80211_sub_if_data *sdata);
 927
 928 /* IBSS code */
 929 int ieee80211_ibss_commit(struct ieee80211_sub_if_data *sdata);
 930 int ieee80211_ibss_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 931 int ieee80211_ibss_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 932 int ieee80211_ibss_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 933 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
 934 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 935 ieee80211_rx_result
 936 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 937                        struct ieee80211_rx_status *rx_status);
 938 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 939                                         u8 *bssid, u8 *addr, u32 supp_rates);
 940
 941 /* scan/BSS handling */
 942 void ieee80211_scan_work(struct work_struct *work);
 943 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 944                            struct cfg80211_scan_request *req);
 945 int ieee80211_scan_results(struct ieee80211_local *local,
 946                            struct iw_request_info *info,
 947                            char *buf, size_t len);
 948 ieee80211_rx_result
 949 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
 950                   struct sk_buff *skb,
 951                   struct ieee80211_rx_status *rx_status);
 952 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 953                                const char *ie, size_t len);
 954
 955 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 956 void ieee80211_scan_failed(struct ieee80211_local *local);
 957 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 958                          struct cfg80211_scan_request *req);
 959 struct ieee80211_bss *
 960 ieee80211_bss_info_update(struct ieee80211_local *local,
 961                           struct ieee80211_rx_status *rx_status,
 962                           struct ieee80211_mgmt *mgmt,
 963                           size_t len,
 964                           struct ieee802_11_elems *elems,
 965                           struct ieee80211_channel *channel,
 966                           bool beacon);
 967 struct ieee80211_bss *
 968 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 969                      u8 *ssid, u8 ssid_len);
 970 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 971                           struct ieee80211_bss *bss);
 972 void ieee80211_rx_bss_remove(struct ieee80211_sub_if_data *sdata, u8 *bssid,
 973                              int freq, u8 *ssid, u8 ssid_len);
 974
 975 /* interface handling */
 976 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 977                      struct net_device **new_dev, enum nl80211_iftype type,
 978                      struct vif_params *params);
 979 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 980                              enum nl80211_iftype type);
 981 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 982 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 983
 984 /* tx handling */
 985 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 986 void ieee80211_tx_pending(unsigned long data);
 987 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 988 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 989 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 990
 991 /* HT */
 992 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 993                                        struct ieee80211_ht_cap *ht_cap_ie,
 994                                        struct ieee80211_sta_ht_cap *ht_cap);
 995 u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
 996                         struct ieee80211_ht_info *hti,
 997                         u16 ap_ht_cap_flags);
 998 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 999 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1000                           const u8 *da, u16 tid,
1001                           u16 initiator, u16 reason_code);
1002
1003 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
1004                                 u16 tid, u16 initiator, u16 reason);
1005 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1006                                     u16 initiator, u16 reason);
1007 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1008 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1009                              struct sta_info *sta,
1010                              struct ieee80211_mgmt *mgmt, size_t len);
1011 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1012                                   struct sta_info *sta,
1013                                   struct ieee80211_mgmt *mgmt,
1014                                   size_t len);
1015 void ieee80211_process_addba_request(struct ieee80211_local *local,
1016                                      struct sta_info *sta,
1017                                      struct ieee80211_mgmt *mgmt,
1018                                      size_t len);
1019
1020 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1021                                    enum ieee80211_back_parties initiator);
1022
1023 /* Spectrum management */
1024 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1025                                        struct ieee80211_mgmt *mgmt,
1026                                        size_t len);
1027 void ieee80211_chswitch_timer(unsigned long data);
1028 void ieee80211_chswitch_work(struct work_struct *work);
1029 void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1030                                   struct ieee80211_channel_sw_ie *sw_elem,
1031                                   struct ieee80211_bss *bss);
1032 void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1033                                  u16 capab_info, u8 *pwr_constr_elem,
1034                                  u8 pwr_constr_elem_len);
1035
1036 /* Suspend/resume */
1037 #ifdef CONFIG_PM
1038 int __ieee80211_suspend(struct ieee80211_hw *hw);
1039 int __ieee80211_resume(struct ieee80211_hw *hw);
1040 #else
1041 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1042 {
1043         return 0;
1044 }
1045 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1046 {
1047         return 0;
1048 }
1049 #endif
1050
1051 /* utility functions/constants */
1052 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1053 extern const unsigned char rfc1042_header[6];
1054 extern const unsigned char bridge_tunnel_header[6];
1055 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1056                         enum nl80211_iftype type);
1057 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1058                              int rate, int erp, int short_preamble);
1059 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1060                                      struct ieee80211_hdr *hdr);
1061 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1062 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1063                       int encrypt);
1064 void ieee802_11_parse_elems(u8 *start, size_t len,
1065                             struct ieee802_11_elems *elems);
1066 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1067 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1068                               enum ieee80211_band band);
1069
1070 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1071 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1072 void ieee80211_dynamic_ps_timer(unsigned long data);
1073 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1074                              struct ieee80211_sub_if_data *sdata,
1075                              int powersave);
1076 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1077                              struct ieee80211_hdr *hdr);
1078 void ieee80211_beacon_loss_work(struct work_struct *work);
1079
1080 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1081                                      enum queue_stop_reason reason);
1082 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1083                                      enum queue_stop_reason reason);
1084 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1085                                     enum queue_stop_reason reason);
1086 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1087                                     enum queue_stop_reason reason);
1088
1089 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1090                          u16 transaction, u16 auth_alg,
1091                          u8 *extra, size_t extra_len,
1092                          const u8 *bssid, int encrypt);
1093 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1094                               u8 *ssid, size_t ssid_len,
1095                               u8 *ie, size_t ie_len);
1096
1097 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1098                                   const size_t supp_rates_len,
1099                                   const u8 *supp_rates);
1100 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1101                             struct ieee802_11_elems *elems,
1102                             enum ieee80211_band band);
1103
1104 #ifdef CONFIG_MAC80211_NOINLINE
1105 #define debug_noinline noinline
1106 #else
1107 #define debug_noinline
1108 #endif
1109
1110 #endif /* IEEE80211_I_H */