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/wireless.h>
  27 #include <net/iw_handler.h>
  28 #include <net/mac80211.h>
  29 #include "key.h"
  30 #include "sta_info.h"
  31
  32 struct ieee80211_local;
  33
  34 /* Maximum number of broadcast/multicast frames to buffer when some of the
  35  * associated stations are using power saving. */
  36 #define AP_MAX_BC_BUFFER 128
  37
  38 /* Maximum number of frames buffered to all STAs, including multicast frames.
  39  * Note: increasing this limit increases the potential memory requirement. Each
  40  * frame can be up to about 2 kB long. */
  41 #define TOTAL_MAX_TX_BUFFER 512
  42
  43 /* Required encryption head and tailroom */
  44 #define IEEE80211_ENCRYPT_HEADROOM 8
  45 #define IEEE80211_ENCRYPT_TAILROOM 12
  46
  47 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  48  * reception of at least three fragmented frames. This limit can be increased
  49  * by changing this define, at the cost of slower frame reassembly and
  50  * increased memory use (about 2 kB of RAM per entry). */
  51 #define IEEE80211_FRAGMENT_MAX 4
  52
  53 /*
  54  * Time after which we ignore scan results and no longer report/use
  55  * them in any way.
  56  */
  57 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  58
  59 struct ieee80211_fragment_entry {
  60         unsigned long first_frag_time;
  61         unsigned int seq;
  62         unsigned int rx_queue;
  63         unsigned int last_frag;
  64         unsigned int extra_len;
  65         struct sk_buff_head skb_list;
  66         int ccmp; /* Whether fragments were encrypted with CCMP */
  67         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  68 };
  69
  70
  71 struct ieee80211_bss {
  72         struct list_head list;
  73         struct ieee80211_bss *hnext;
  74         size_t ssid_len;
  75
  76         atomic_t users;
  77
  78         u8 bssid[ETH_ALEN];
  79         u8 ssid[IEEE80211_MAX_SSID_LEN];
  80         u8 dtim_period;
  81         u16 capability; /* host byte order */
  82         enum ieee80211_band band;
  83         int freq;
  84         int signal, noise, qual;
  85         u8 *ies; /* all information elements from the last Beacon or Probe
  86                   * Response frames; note Beacon frame is not allowed to
  87                   * override values from Probe Response */
  88         size_t ies_len;
  89         bool wmm_used;
  90 #ifdef CONFIG_MAC80211_MESH
  91         u8 *mesh_id;
  92         size_t mesh_id_len;
  93         u8 *mesh_cfg;
  94 #endif
  95 #define IEEE80211_MAX_SUPP_RATES 32
  96         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  97         size_t supp_rates_len;
  98         u64 timestamp;
  99         int beacon_int;
 100
 101         unsigned long last_probe_resp;
 102         unsigned long last_update;
 103
 104         /* during assocation, we save an ERP value from a probe response so
 105          * that we can feed ERP info to the driver when handling the
 106          * association completes. these fields probably won't be up-to-date
 107          * otherwise, you probably don't want to use them. */
 108         int has_erp_value;
 109         u8 erp_value;
 110 };
 111
 112 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 113 {
 114 #ifdef CONFIG_MAC80211_MESH
 115         return bss->mesh_cfg;
 116 #endif
 117         return NULL;
 118 }
 119
 120 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 121 {
 122 #ifdef CONFIG_MAC80211_MESH
 123         return bss->mesh_id;
 124 #endif
 125         return NULL;
 126 }
 127
 128 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 129 {
 130 #ifdef CONFIG_MAC80211_MESH
 131         return bss->mesh_id_len;
 132 #endif
 133         return 0;
 134 }
 135
 136
 137 typedef unsigned __bitwise__ ieee80211_tx_result;
 138 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 139 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 140 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 141
 142 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 143 #define IEEE80211_TX_UNICAST            BIT(1)
 144 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 145
 146 struct ieee80211_tx_data {
 147         struct sk_buff *skb;
 148         struct net_device *dev;
 149         struct ieee80211_local *local;
 150         struct ieee80211_sub_if_data *sdata;
 151         struct sta_info *sta;
 152         struct ieee80211_key *key;
 153
 154         struct ieee80211_channel *channel;
 155
 156         /* Extra fragments (in addition to the first fragment
 157          * in skb) */
 158         struct sk_buff **extra_frag;
 159         int num_extra_frag;
 160
 161         u16 ethertype;
 162         unsigned int flags;
 163 };
 164
 165
 166 typedef unsigned __bitwise__ ieee80211_rx_result;
 167 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 168 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 169 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 170 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 171
 172 #define IEEE80211_RX_IN_SCAN            BIT(0)
 173 /* frame is destined to interface currently processed (incl. multicast frames) */
 174 #define IEEE80211_RX_RA_MATCH           BIT(1)
 175 #define IEEE80211_RX_AMSDU              BIT(2)
 176 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 177 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 178
 179 struct ieee80211_rx_data {
 180         struct sk_buff *skb;
 181         struct net_device *dev;
 182         struct ieee80211_local *local;
 183         struct ieee80211_sub_if_data *sdata;
 184         struct sta_info *sta;
 185         struct ieee80211_key *key;
 186         struct ieee80211_rx_status *status;
 187         struct ieee80211_rate *rate;
 188
 189         u16 ethertype;
 190         unsigned int flags;
 191         int sent_ps_buffered;
 192         int queue;
 193         u32 tkip_iv32;
 194         u16 tkip_iv16;
 195 };
 196
 197 struct ieee80211_tx_stored_packet {
 198         struct sk_buff *skb;
 199         struct sk_buff **extra_frag;
 200         int num_extra_frag;
 201 };
 202
 203 struct beacon_data {
 204         u8 *head, *tail;
 205         int head_len, tail_len;
 206         int dtim_period;
 207 };
 208
 209 struct ieee80211_if_ap {
 210         struct beacon_data *beacon;
 211
 212         struct list_head vlans;
 213
 214         u8 ssid[IEEE80211_MAX_SSID_LEN];
 215         size_t ssid_len;
 216
 217         /* yes, this looks ugly, but guarantees that we can later use
 218          * bitmap_empty :)
 219          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 220         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 221         struct sk_buff_head ps_bc_buf;
 222         atomic_t num_sta_ps; /* number of stations in PS mode */
 223         int dtim_count;
 224 };
 225
 226 struct ieee80211_if_wds {
 227         struct sta_info *sta;
 228         u8 remote_addr[ETH_ALEN];
 229 };
 230
 231 struct ieee80211_if_vlan {
 232         struct list_head list;
 233 };
 234
 235 struct mesh_stats {
 236         __u32 fwded_frames;             /* Mesh forwarded frames */
 237         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 238         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 239         atomic_t estab_plinks;
 240 };
 241
 242 #define PREQ_Q_F_START          0x1
 243 #define PREQ_Q_F_REFRESH        0x2
 244 struct mesh_preq_queue {
 245         struct list_head list;
 246         u8 dst[ETH_ALEN];
 247         u8 flags;
 248 };
 249
 250 struct mesh_config {
 251         /* Timeouts in ms */
 252         /* Mesh plink management parameters */
 253         u16 dot11MeshRetryTimeout;
 254         u16 dot11MeshConfirmTimeout;
 255         u16 dot11MeshHoldingTimeout;
 256         u16 dot11MeshMaxPeerLinks;
 257         u8  dot11MeshMaxRetries;
 258         u8  dot11MeshTTL;
 259         bool auto_open_plinks;
 260         /* HWMP parameters */
 261         u8  dot11MeshHWMPmaxPREQretries;
 262         u32 path_refresh_time;
 263         u16 min_discovery_timeout;
 264         u32 dot11MeshHWMPactivePathTimeout;
 265         u16 dot11MeshHWMPpreqMinInterval;
 266         u16 dot11MeshHWMPnetDiameterTraversalTime;
 267 };
 268
 269
 270 /* flags used in struct ieee80211_if_sta.flags */
 271 #define IEEE80211_STA_SSID_SET          BIT(0)
 272 #define IEEE80211_STA_BSSID_SET         BIT(1)
 273 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 274 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 275 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 276 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 277 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 278 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 279 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 280 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 281 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 282 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 283 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 284 /* flags for MLME request */
 285 #define IEEE80211_STA_REQ_SCAN 0
 286 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 287 #define IEEE80211_STA_REQ_AUTH 2
 288 #define IEEE80211_STA_REQ_RUN  3
 289
 290 /* STA/IBSS MLME states */
 291 enum ieee80211_sta_mlme_state {
 292         IEEE80211_STA_MLME_DISABLED,
 293         IEEE80211_STA_MLME_DIRECT_PROBE,
 294         IEEE80211_STA_MLME_AUTHENTICATE,
 295         IEEE80211_STA_MLME_ASSOCIATE,
 296         IEEE80211_STA_MLME_ASSOCIATED,
 297         IEEE80211_STA_MLME_IBSS_SEARCH,
 298         IEEE80211_STA_MLME_IBSS_JOINED,
 299 };
 300
 301 /* bitfield of allowed auth algs */
 302 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 303 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 304 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 305
 306 struct ieee80211_if_sta {
 307         struct timer_list timer;
 308         struct work_struct work;
 309         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 310         u8 ssid[IEEE80211_MAX_SSID_LEN];
 311         enum ieee80211_sta_mlme_state state;
 312         size_t ssid_len;
 313         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 314         size_t scan_ssid_len;
 315         u16 aid;
 316         u16 ap_capab, capab;
 317         u8 *extra_ie; /* to be added to the end of AssocReq */
 318         size_t extra_ie_len;
 319
 320         /* The last AssocReq/Resp IEs */
 321         u8 *assocreq_ies, *assocresp_ies;
 322         size_t assocreq_ies_len, assocresp_ies_len;
 323
 324         struct sk_buff_head skb_queue;
 325
 326         int assoc_scan_tries; /* number of scans done pre-association */
 327         int direct_probe_tries; /* retries for direct probes */
 328         int auth_tries; /* retries for auth req */
 329         int assoc_tries; /* retries for assoc req */
 330
 331         unsigned long request;
 332
 333         unsigned long last_probe;
 334
 335         unsigned int flags;
 336
 337         unsigned int auth_algs; /* bitfield of allowed auth algs */
 338         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 339         int auth_transaction;
 340
 341         unsigned long ibss_join_req;
 342         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 343         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 344
 345         int wmm_last_param_set;
 346 };
 347
 348 struct ieee80211_if_mesh {
 349         struct work_struct work;
 350         struct timer_list housekeeping_timer;
 351         struct timer_list mesh_path_timer;
 352         struct sk_buff_head skb_queue;
 353
 354         bool housekeeping;
 355
 356         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 357         size_t mesh_id_len;
 358         /* Active Path Selection Protocol Identifier */
 359         u8 mesh_pp_id[4];
 360         /* Active Path Selection Metric Identifier */
 361         u8 mesh_pm_id[4];
 362         /* Congestion Control Mode Identifier */
 363         u8 mesh_cc_id[4];
 364         /* Local mesh Destination Sequence Number */
 365         u32 dsn;
 366         /* Last used PREQ ID */
 367         u32 preq_id;
 368         atomic_t mpaths;
 369         /* Timestamp of last DSN update */
 370         unsigned long last_dsn_update;
 371         /* Timestamp of last DSN sent */
 372         unsigned long last_preq;
 373         struct mesh_rmc *rmc;
 374         spinlock_t mesh_preq_queue_lock;
 375         struct mesh_preq_queue preq_queue;
 376         int preq_queue_len;
 377         struct mesh_stats mshstats;
 378         struct mesh_config mshcfg;
 379         u32 mesh_seqnum;
 380         bool accepting_plinks;
 381 };
 382
 383 #ifdef CONFIG_MAC80211_MESH
 384 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 385         do { (msh)->mshstats.name++; } while (0)
 386 #else
 387 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 388         do { } while (0)
 389 #endif
 390
 391 /**
 392  * enum ieee80211_sub_if_data_flags - virtual interface flags
 393  *
 394  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 395  * @IEEE80211_SDATA_PROMISC: interface is promisc
 396  * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
 397  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 398  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 399  *      associated stations and deliver multicast frames both
 400  *      back to wireless media and to the local net stack.
 401  */
 402 enum ieee80211_sub_if_data_flags {
 403         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 404         IEEE80211_SDATA_PROMISC                 = BIT(1),
 405         IEEE80211_SDATA_USERSPACE_MLME          = BIT(2),
 406         IEEE80211_SDATA_OPERATING_GMODE         = BIT(3),
 407         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(4),
 408 };
 409
 410 struct ieee80211_sub_if_data {
 411         struct list_head list;
 412
 413         struct wireless_dev wdev;
 414
 415         /* keys */
 416         struct list_head key_list;
 417
 418         struct net_device *dev;
 419         struct ieee80211_local *local;
 420
 421         unsigned int flags;
 422
 423         int drop_unencrypted;
 424
 425         /* Fragment table for host-based reassembly */
 426         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 427         unsigned int fragment_next;
 428
 429 #define NUM_DEFAULT_KEYS 4
 430         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 431         struct ieee80211_key *default_key;
 432
 433         u16 sequence_number;
 434
 435         /*
 436          * AP this belongs to: self in AP mode and
 437          * corresponding AP in VLAN mode, NULL for
 438          * all others (might be needed later in IBSS)
 439          */
 440         struct ieee80211_if_ap *bss;
 441
 442         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 443         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 444
 445         union {
 446                 struct ieee80211_if_ap ap;
 447                 struct ieee80211_if_wds wds;
 448                 struct ieee80211_if_vlan vlan;
 449                 struct ieee80211_if_sta sta;
 450 #ifdef CONFIG_MAC80211_MESH
 451                 struct ieee80211_if_mesh mesh;
 452 #endif
 453                 u32 mntr_flags;
 454         } u;
 455
 456 #ifdef CONFIG_MAC80211_DEBUGFS
 457         struct dentry *debugfsdir;
 458         union {
 459                 struct {
 460                         struct dentry *drop_unencrypted;
 461                         struct dentry *state;
 462                         struct dentry *bssid;
 463                         struct dentry *prev_bssid;
 464                         struct dentry *ssid_len;
 465                         struct dentry *aid;
 466                         struct dentry *ap_capab;
 467                         struct dentry *capab;
 468                         struct dentry *extra_ie_len;
 469                         struct dentry *auth_tries;
 470                         struct dentry *assoc_tries;
 471                         struct dentry *auth_algs;
 472                         struct dentry *auth_alg;
 473                         struct dentry *auth_transaction;
 474                         struct dentry *flags;
 475                         struct dentry *force_unicast_rateidx;
 476                         struct dentry *max_ratectrl_rateidx;
 477                 } sta;
 478                 struct {
 479                         struct dentry *drop_unencrypted;
 480                         struct dentry *num_sta_ps;
 481                         struct dentry *dtim_count;
 482                         struct dentry *force_unicast_rateidx;
 483                         struct dentry *max_ratectrl_rateidx;
 484                         struct dentry *num_buffered_multicast;
 485                 } ap;
 486                 struct {
 487                         struct dentry *drop_unencrypted;
 488                         struct dentry *peer;
 489                         struct dentry *force_unicast_rateidx;
 490                         struct dentry *max_ratectrl_rateidx;
 491                 } wds;
 492                 struct {
 493                         struct dentry *drop_unencrypted;
 494                         struct dentry *force_unicast_rateidx;
 495                         struct dentry *max_ratectrl_rateidx;
 496                 } vlan;
 497                 struct {
 498                         struct dentry *mode;
 499                 } monitor;
 500         } debugfs;
 501         struct {
 502                 struct dentry *default_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 /* maximum number of hardware queues we support. */
 565 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 566
 567 struct ieee80211_master_priv {
 568         struct ieee80211_local *local;
 569 };
 570
 571 struct ieee80211_local {
 572         /* embed the driver visible part.
 573          * don't cast (use the static inlines below), but we keep
 574          * it first anyway so they become a no-op */
 575         struct ieee80211_hw hw;
 576
 577         const struct ieee80211_ops *ops;
 578
 579         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 580
 581         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 582         int open_count;
 583         int monitors, cooked_mntrs;
 584         /* number of interfaces with corresponding FIF_ flags */
 585         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 586         unsigned int filter_flags; /* FIF_* */
 587         struct iw_statistics wstats;
 588         u8 wstats_flags;
 589         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 590         int tx_headroom; /* required headroom for hardware/radiotap */
 591
 592         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 593          * added to skb_queue will be processed, but frames in
 594          * skb_queue_unreliable may be dropped if the total length of these
 595          * queues increases over the limit. */
 596 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 597         struct tasklet_struct tasklet;
 598         struct sk_buff_head skb_queue;
 599         struct sk_buff_head skb_queue_unreliable;
 600
 601         /* Station data */
 602         /*
 603          * The lock only protects the list, hash, timer and counter
 604          * against manipulation, reads are done in RCU. Additionally,
 605          * the lock protects each BSS's TIM bitmap.
 606          */
 607         spinlock_t sta_lock;
 608         unsigned long num_sta;
 609         struct list_head sta_list;
 610         struct list_head sta_flush_list;
 611         struct work_struct sta_flush_work;
 612         struct sta_info *sta_hash[STA_HASH_SIZE];
 613         struct timer_list sta_cleanup;
 614
 615         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 616         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 617         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 618         struct tasklet_struct tx_pending_tasklet;
 619
 620         /* number of interfaces with corresponding IFF_ flags */
 621         atomic_t iff_allmultis, iff_promiscs;
 622
 623         struct rate_control_ref *rate_ctrl;
 624
 625         int rts_threshold;
 626         int fragmentation_threshold;
 627
 628         struct crypto_blkcipher *wep_tx_tfm;
 629         struct crypto_blkcipher *wep_rx_tfm;
 630         u32 wep_iv;
 631
 632         struct list_head interfaces;
 633
 634         /*
 635          * Key lock, protects sdata's key_list and sta_info's
 636          * key pointers (write access, they're RCU.)
 637          */
 638         spinlock_t key_lock;
 639
 640
 641         /* Scanning and BSS list */
 642         bool sw_scanning, hw_scanning;
 643         int scan_channel_idx;
 644         enum ieee80211_band scan_band;
 645
 646         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 647         unsigned long last_scan_completed;
 648         struct delayed_work scan_work;
 649         struct ieee80211_sub_if_data *scan_sdata;
 650         struct ieee80211_channel *oper_channel, *scan_channel;
 651         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 652         size_t scan_ssid_len;
 653         struct list_head bss_list;
 654         struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
 655         spinlock_t bss_lock;
 656
 657         /* SNMP counters */
 658         /* dot11CountersTable */
 659         u32 dot11TransmittedFragmentCount;
 660         u32 dot11MulticastTransmittedFrameCount;
 661         u32 dot11FailedCount;
 662         u32 dot11RetryCount;
 663         u32 dot11MultipleRetryCount;
 664         u32 dot11FrameDuplicateCount;
 665         u32 dot11ReceivedFragmentCount;
 666         u32 dot11MulticastReceivedFrameCount;
 667         u32 dot11TransmittedFrameCount;
 668         u32 dot11WEPUndecryptableCount;
 669
 670 #ifdef CONFIG_MAC80211_LEDS
 671         int tx_led_counter, rx_led_counter;
 672         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 673         char tx_led_name[32], rx_led_name[32],
 674              assoc_led_name[32], radio_led_name[32];
 675 #endif
 676
 677 #ifdef CONFIG_MAC80211_DEBUGFS
 678         struct work_struct sta_debugfs_add;
 679 #endif
 680
 681 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 682         /* TX/RX handler statistics */
 683         unsigned int tx_handlers_drop;
 684         unsigned int tx_handlers_queued;
 685         unsigned int tx_handlers_drop_unencrypted;
 686         unsigned int tx_handlers_drop_fragment;
 687         unsigned int tx_handlers_drop_wep;
 688         unsigned int tx_handlers_drop_not_assoc;
 689         unsigned int tx_handlers_drop_unauth_port;
 690         unsigned int rx_handlers_drop;
 691         unsigned int rx_handlers_queued;
 692         unsigned int rx_handlers_drop_nullfunc;
 693         unsigned int rx_handlers_drop_defrag;
 694         unsigned int rx_handlers_drop_short;
 695         unsigned int rx_handlers_drop_passive_scan;
 696         unsigned int tx_expand_skb_head;
 697         unsigned int tx_expand_skb_head_cloned;
 698         unsigned int rx_expand_skb_head;
 699         unsigned int rx_expand_skb_head2;
 700         unsigned int rx_handlers_fragments;
 701         unsigned int tx_status_drop;
 702 #define I802_DEBUG_INC(c) (c)++
 703 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 704 #define I802_DEBUG_INC(c) do { } while (0)
 705 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 706
 707
 708         int total_ps_buffered; /* total number of all buffered unicast and
 709                                 * multicast packets for power saving stations
 710                                 */
 711         int wifi_wme_noack_test;
 712         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 713
 714 #ifdef CONFIG_MAC80211_DEBUGFS
 715         struct local_debugfsdentries {
 716                 struct dentry *rcdir;
 717                 struct dentry *rcname;
 718                 struct dentry *frequency;
 719                 struct dentry *rts_threshold;
 720                 struct dentry *fragmentation_threshold;
 721                 struct dentry *short_retry_limit;
 722                 struct dentry *long_retry_limit;
 723                 struct dentry *total_ps_buffered;
 724                 struct dentry *wep_iv;
 725                 struct dentry *statistics;
 726                 struct local_debugfsdentries_statsdentries {
 727                         struct dentry *transmitted_fragment_count;
 728                         struct dentry *multicast_transmitted_frame_count;
 729                         struct dentry *failed_count;
 730                         struct dentry *retry_count;
 731                         struct dentry *multiple_retry_count;
 732                         struct dentry *frame_duplicate_count;
 733                         struct dentry *received_fragment_count;
 734                         struct dentry *multicast_received_frame_count;
 735                         struct dentry *transmitted_frame_count;
 736                         struct dentry *wep_undecryptable_count;
 737                         struct dentry *num_scans;
 738 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 739                         struct dentry *tx_handlers_drop;
 740                         struct dentry *tx_handlers_queued;
 741                         struct dentry *tx_handlers_drop_unencrypted;
 742                         struct dentry *tx_handlers_drop_fragment;
 743                         struct dentry *tx_handlers_drop_wep;
 744                         struct dentry *tx_handlers_drop_not_assoc;
 745                         struct dentry *tx_handlers_drop_unauth_port;
 746                         struct dentry *rx_handlers_drop;
 747                         struct dentry *rx_handlers_queued;
 748                         struct dentry *rx_handlers_drop_nullfunc;
 749                         struct dentry *rx_handlers_drop_defrag;
 750                         struct dentry *rx_handlers_drop_short;
 751                         struct dentry *rx_handlers_drop_passive_scan;
 752                         struct dentry *tx_expand_skb_head;
 753                         struct dentry *tx_expand_skb_head_cloned;
 754                         struct dentry *rx_expand_skb_head;
 755                         struct dentry *rx_expand_skb_head2;
 756                         struct dentry *rx_handlers_fragments;
 757                         struct dentry *tx_status_drop;
 758 #endif
 759                         struct dentry *dot11ACKFailureCount;
 760                         struct dentry *dot11RTSFailureCount;
 761                         struct dentry *dot11FCSErrorCount;
 762                         struct dentry *dot11RTSSuccessCount;
 763                 } stats;
 764                 struct dentry *stations;
 765                 struct dentry *keys;
 766         } debugfs;
 767 #endif
 768 };
 769
 770 static inline struct ieee80211_sub_if_data *
 771 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 772 {
 773         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 774
 775         BUG_ON(!local || local->mdev == dev);
 776
 777         return netdev_priv(dev);
 778 }
 779
 780 /* this struct represents 802.11n's RA/TID combination */
 781 struct ieee80211_ra_tid {
 782         u8 ra[ETH_ALEN];
 783         u16 tid;
 784 };
 785
 786 /* Parsed Information Elements */
 787 struct ieee802_11_elems {
 788         u8 *ie_start;
 789         size_t total_len;
 790
 791         /* pointers to IEs */
 792         u8 *ssid;
 793         u8 *supp_rates;
 794         u8 *fh_params;
 795         u8 *ds_params;
 796         u8 *cf_params;
 797         u8 *tim;
 798         u8 *ibss_params;
 799         u8 *challenge;
 800         u8 *wpa;
 801         u8 *rsn;
 802         u8 *erp_info;
 803         u8 *ext_supp_rates;
 804         u8 *wmm_info;
 805         u8 *wmm_param;
 806         struct ieee80211_ht_cap *ht_cap_elem;
 807         struct ieee80211_ht_info *ht_info_elem;
 808         u8 *mesh_config;
 809         u8 *mesh_id;
 810         u8 *peer_link;
 811         u8 *preq;
 812         u8 *prep;
 813         u8 *perr;
 814         u8 *ch_switch_elem;
 815         u8 *country_elem;
 816         u8 *pwr_constr_elem;
 817         u8 *quiet_elem;         /* first quite element */
 818
 819         /* length of them, respectively */
 820         u8 ssid_len;
 821         u8 supp_rates_len;
 822         u8 fh_params_len;
 823         u8 ds_params_len;
 824         u8 cf_params_len;
 825         u8 tim_len;
 826         u8 ibss_params_len;
 827         u8 challenge_len;
 828         u8 wpa_len;
 829         u8 rsn_len;
 830         u8 erp_info_len;
 831         u8 ext_supp_rates_len;
 832         u8 wmm_info_len;
 833         u8 wmm_param_len;
 834         u8 mesh_config_len;
 835         u8 mesh_id_len;
 836         u8 peer_link_len;
 837         u8 preq_len;
 838         u8 prep_len;
 839         u8 perr_len;
 840         u8 ch_switch_elem_len;
 841         u8 country_elem_len;
 842         u8 pwr_constr_elem_len;
 843         u8 quiet_elem_len;
 844         u8 num_of_quiet_elem;   /* can be more the one */
 845 };
 846
 847 static inline struct ieee80211_local *hw_to_local(
 848         struct ieee80211_hw *hw)
 849 {
 850         return container_of(hw, struct ieee80211_local, hw);
 851 }
 852
 853 static inline struct ieee80211_hw *local_to_hw(
 854         struct ieee80211_local *local)
 855 {
 856         return &local->hw;
 857 }
 858
 859
 860 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 861 {
 862         return compare_ether_addr(raddr, addr) == 0 ||
 863                is_broadcast_ether_addr(raddr);
 864 }
 865
 866
 867 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 868 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 869 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 870 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 871                                       u32 changed);
 872 void ieee80211_configure_filter(struct ieee80211_local *local);
 873
 874 /* wireless extensions */
 875 extern const struct iw_handler_def ieee80211_iw_handler_def;
 876
 877 /* STA/IBSS code */
 878 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 879 void ieee80211_scan_work(struct work_struct *work);
 880 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 881                            struct ieee80211_rx_status *rx_status);
 882 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 883 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 884 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 885 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 886                             struct ieee80211_if_sta *ifsta);
 887 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 888                                         struct sk_buff *skb, u8 *bssid,
 889                                         u8 *addr, u64 supp_rates);
 890 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 891 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 892 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 893 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 894                             struct ieee802_11_elems *elems,
 895                             enum ieee80211_band band);
 896 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 897                               u8 *ssid, size_t ssid_len);
 898
 899 /* scan/BSS handling */
 900 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 901                            u8 *ssid, size_t ssid_len);
 902 int ieee80211_scan_results(struct ieee80211_local *local,
 903                            struct iw_request_info *info,
 904                            char *buf, size_t len);
 905 ieee80211_rx_result
 906 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
 907                   struct sk_buff *skb,
 908                   struct ieee80211_rx_status *rx_status);
 909 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 910 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 911 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 912                                char *ie, size_t len);
 913
 914 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 915 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 916                          u8 *ssid, size_t ssid_len);
 917 struct ieee80211_bss *
 918 ieee80211_bss_info_update(struct ieee80211_local *local,
 919                           struct ieee80211_rx_status *rx_status,
 920                           struct ieee80211_mgmt *mgmt,
 921                           size_t len,
 922                           struct ieee802_11_elems *elems,
 923                           int freq, bool beacon);
 924 struct ieee80211_bss *
 925 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
 926                      u8 *ssid, u8 ssid_len);
 927 struct ieee80211_bss *
 928 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 929                      u8 *ssid, u8 ssid_len);
 930 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 931                           struct ieee80211_bss *bss);
 932
 933 /* interface handling */
 934 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 935                      struct net_device **new_dev, enum nl80211_iftype type,
 936                      struct vif_params *params);
 937 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 938                              enum nl80211_iftype type);
 939 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 940 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 941
 942 /* tx handling */
 943 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 944 void ieee80211_tx_pending(unsigned long data);
 945 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 946 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 947 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 948
 949 /* HT */
 950 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 951                                        struct ieee80211_ht_cap *ht_cap_ie,
 952                                        struct ieee80211_sta_ht_cap *ht_cap);
 953 u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
 954                         struct ieee80211_ht_info *hti,
 955                         u16 ap_ht_cap_flags);
 956 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 957
 958 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 959                                 u16 tid, u16 initiator, u16 reason);
 960 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 961 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 962                              struct sta_info *sta,
 963                              struct ieee80211_mgmt *mgmt, size_t len);
 964 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 965                                   struct sta_info *sta,
 966                                   struct ieee80211_mgmt *mgmt,
 967                                   size_t len);
 968 void ieee80211_process_addba_request(struct ieee80211_local *local,
 969                                      struct sta_info *sta,
 970                                      struct ieee80211_mgmt *mgmt,
 971                                      size_t len);
 972
 973 /* Spectrum management */
 974 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
 975                                        struct ieee80211_mgmt *mgmt,
 976                                        size_t len);
 977
 978 /* utility functions/constants */
 979 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 980 extern const unsigned char rfc1042_header[6];
 981 extern const unsigned char bridge_tunnel_header[6];
 982 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 983                         enum nl80211_iftype type);
 984 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 985                              int rate, int erp, int short_preamble);
 986 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
 987                                      struct ieee80211_hdr *hdr);
 988 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
 989 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 990                       int encrypt);
 991 void ieee802_11_parse_elems(u8 *start, size_t len,
 992                             struct ieee802_11_elems *elems);
 993 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
 994 u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
 995                               enum ieee80211_band band);
 996
 997 #ifdef CONFIG_MAC80211_NOINLINE
 998 #define debug_noinline noinline
 999 #else
1000 #define debug_noinline
1001 #endif
1002
1003 #endif /* IEEE80211_I_H */