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 /* ieee80211.o internal definitions, etc. These are not included into
  33  * low-level drivers. */
  34
  35 struct ieee80211_local;
  36
  37 /* Maximum number of broadcast/multicast frames to buffer when some of the
  38  * associated stations are using power saving. */
  39 #define AP_MAX_BC_BUFFER 128
  40
  41 /* Maximum number of frames buffered to all STAs, including multicast frames.
  42  * Note: increasing this limit increases the potential memory requirement. Each
  43  * frame can be up to about 2 kB long. */
  44 #define TOTAL_MAX_TX_BUFFER 512
  45
  46 /* Required encryption head and tailroom */
  47 #define IEEE80211_ENCRYPT_HEADROOM 8
  48 #define IEEE80211_ENCRYPT_TAILROOM 12
  49
  50 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  51  * reception of at least three fragmented frames. This limit can be increased
  52  * by changing this define, at the cost of slower frame reassembly and
  53  * increased memory use (about 2 kB of RAM per entry). */
  54 #define IEEE80211_FRAGMENT_MAX 4
  55
  56 /*
  57  * Time after which we ignore scan results and no longer report/use
  58  * them in any way.
  59  */
  60 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  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         struct list_head list;
  76         struct ieee80211_bss *hnext;
  77         size_t ssid_len;
  78
  79         atomic_t users;
  80
  81         u8 bssid[ETH_ALEN];
  82         u8 ssid[IEEE80211_MAX_SSID_LEN];
  83         u8 dtim_period;
  84         u16 capability; /* host byte order */
  85         enum ieee80211_band band;
  86         int freq;
  87         int signal, noise, qual;
  88         u8 *ies; /* all information elements from the last Beacon or Probe
  89                   * Response frames; note Beacon frame is not allowed to
  90                   * override values from Probe Response */
  91         size_t ies_len;
  92         bool wmm_used;
  93 #ifdef CONFIG_MAC80211_MESH
  94         u8 *mesh_id;
  95         size_t mesh_id_len;
  96         u8 *mesh_cfg;
  97 #endif
  98 #define IEEE80211_MAX_SUPP_RATES 32
  99         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 100         size_t supp_rates_len;
 101         u64 timestamp;
 102         int beacon_int;
 103
 104         unsigned long last_probe_resp;
 105         unsigned long last_update;
 106
 107         /* during assocation, we save an ERP value from a probe response so
 108          * that we can feed ERP info to the driver when handling the
 109          * association completes. these fields probably won't be up-to-date
 110          * otherwise, you probably don't want to use them. */
 111         int has_erp_value;
 112         u8 erp_value;
 113 };
 114
 115 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 116 {
 117 #ifdef CONFIG_MAC80211_MESH
 118         return bss->mesh_cfg;
 119 #endif
 120         return NULL;
 121 }
 122
 123 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 124 {
 125 #ifdef CONFIG_MAC80211_MESH
 126         return bss->mesh_id;
 127 #endif
 128         return NULL;
 129 }
 130
 131 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 132 {
 133 #ifdef CONFIG_MAC80211_MESH
 134         return bss->mesh_id_len;
 135 #endif
 136         return 0;
 137 }
 138
 139
 140 typedef unsigned __bitwise__ ieee80211_tx_result;
 141 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 142 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 143 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 144
 145 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 146 #define IEEE80211_TX_UNICAST            BIT(1)
 147 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 148 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 149
 150 struct ieee80211_tx_data {
 151         struct sk_buff *skb;
 152         struct net_device *dev;
 153         struct ieee80211_local *local;
 154         struct ieee80211_sub_if_data *sdata;
 155         struct sta_info *sta;
 156         struct ieee80211_key *key;
 157
 158         struct ieee80211_channel *channel;
 159         s8 rate_idx;
 160         /* use this rate (if set) for last fragment; rate can
 161          * be set to lower rate for the first fragments, e.g.,
 162          * when using CTS protection with IEEE 802.11g. */
 163         s8 last_frag_rate_idx;
 164
 165         /* Extra fragments (in addition to the first fragment
 166          * in skb) */
 167         struct sk_buff **extra_frag;
 168         int num_extra_frag;
 169
 170         u16 ethertype;
 171         unsigned int flags;
 172 };
 173
 174
 175 typedef unsigned __bitwise__ ieee80211_rx_result;
 176 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 177 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 178 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 179 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 180
 181 #define IEEE80211_RX_IN_SCAN            BIT(0)
 182 /* frame is destined to interface currently processed (incl. multicast frames) */
 183 #define IEEE80211_RX_RA_MATCH           BIT(1)
 184 #define IEEE80211_RX_AMSDU              BIT(2)
 185 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 186 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 187
 188 struct ieee80211_rx_data {
 189         struct sk_buff *skb;
 190         struct net_device *dev;
 191         struct ieee80211_local *local;
 192         struct ieee80211_sub_if_data *sdata;
 193         struct sta_info *sta;
 194         struct ieee80211_key *key;
 195         struct ieee80211_rx_status *status;
 196         struct ieee80211_rate *rate;
 197
 198         u16 ethertype;
 199         unsigned int flags;
 200         int sent_ps_buffered;
 201         int queue;
 202         u32 tkip_iv32;
 203         u16 tkip_iv16;
 204 };
 205
 206 struct ieee80211_tx_stored_packet {
 207         struct sk_buff *skb;
 208         struct sk_buff **extra_frag;
 209         s8 last_frag_rate_idx;
 210         int num_extra_frag;
 211         bool last_frag_rate_ctrl_probe;
 212 };
 213
 214 struct beacon_data {
 215         u8 *head, *tail;
 216         int head_len, tail_len;
 217         int dtim_period;
 218 };
 219
 220 struct ieee80211_if_ap {
 221         struct beacon_data *beacon;
 222
 223         struct list_head vlans;
 224
 225         u8 ssid[IEEE80211_MAX_SSID_LEN];
 226         size_t ssid_len;
 227
 228         /* yes, this looks ugly, but guarantees that we can later use
 229          * bitmap_empty :)
 230          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 231         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 232         struct sk_buff_head ps_bc_buf;
 233         atomic_t num_sta_ps; /* number of stations in PS mode */
 234         int dtim_count;
 235         int num_beacons; /* number of TXed beacon frames for this BSS */
 236 };
 237
 238 struct ieee80211_if_wds {
 239         struct sta_info *sta;
 240         u8 remote_addr[ETH_ALEN];
 241 };
 242
 243 struct ieee80211_if_vlan {
 244         struct list_head list;
 245 };
 246
 247 struct mesh_stats {
 248         __u32 fwded_frames;             /* Mesh forwarded frames */
 249         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 250         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 251         atomic_t estab_plinks;
 252 };
 253
 254 #define PREQ_Q_F_START          0x1
 255 #define PREQ_Q_F_REFRESH        0x2
 256 struct mesh_preq_queue {
 257         struct list_head list;
 258         u8 dst[ETH_ALEN];
 259         u8 flags;
 260 };
 261
 262 struct mesh_config {
 263         /* Timeouts in ms */
 264         /* Mesh plink management parameters */
 265         u16 dot11MeshRetryTimeout;
 266         u16 dot11MeshConfirmTimeout;
 267         u16 dot11MeshHoldingTimeout;
 268         u16 dot11MeshMaxPeerLinks;
 269         u8  dot11MeshMaxRetries;
 270         u8  dot11MeshTTL;
 271         bool auto_open_plinks;
 272         /* HWMP parameters */
 273         u8  dot11MeshHWMPmaxPREQretries;
 274         u32 path_refresh_time;
 275         u16 min_discovery_timeout;
 276         u32 dot11MeshHWMPactivePathTimeout;
 277         u16 dot11MeshHWMPpreqMinInterval;
 278         u16 dot11MeshHWMPnetDiameterTraversalTime;
 279 };
 280
 281
 282 /* flags used in struct ieee80211_if_sta.flags */
 283 #define IEEE80211_STA_SSID_SET          BIT(0)
 284 #define IEEE80211_STA_BSSID_SET         BIT(1)
 285 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 286 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 287 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 288 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 289 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 290 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 291 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 292 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 293 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 294 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 295 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 296 /* flags for  MLME request*/
 297 #define IEEE80211_STA_REQ_SCAN 0
 298 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 299 #define IEEE80211_STA_REQ_AUTH 2
 300 #define IEEE80211_STA_REQ_RUN  3
 301
 302 /* flags used for setting mlme state */
 303 enum ieee80211_sta_mlme_state {
 304         IEEE80211_STA_MLME_DISABLED,
 305         IEEE80211_STA_MLME_DIRECT_PROBE,
 306         IEEE80211_STA_MLME_AUTHENTICATE,
 307         IEEE80211_STA_MLME_ASSOCIATE,
 308         IEEE80211_STA_MLME_ASSOCIATED,
 309         IEEE80211_STA_MLME_IBSS_SEARCH,
 310         IEEE80211_STA_MLME_IBSS_JOINED,
 311 };
 312
 313 /* bitfield of allowed auth algs */
 314 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 315 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 316 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 317
 318 struct ieee80211_if_sta {
 319         struct timer_list timer;
 320         struct work_struct work;
 321         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 322         u8 ssid[IEEE80211_MAX_SSID_LEN];
 323         enum ieee80211_sta_mlme_state state;
 324         size_t ssid_len;
 325         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 326         size_t scan_ssid_len;
 327         u16 aid;
 328         u16 ap_capab, capab;
 329         u8 *extra_ie; /* to be added to the end of AssocReq */
 330         size_t extra_ie_len;
 331
 332         /* The last AssocReq/Resp IEs */
 333         u8 *assocreq_ies, *assocresp_ies;
 334         size_t assocreq_ies_len, assocresp_ies_len;
 335
 336         struct sk_buff_head skb_queue;
 337
 338         int assoc_scan_tries; /* number of scans done pre-association */
 339         int direct_probe_tries; /* retries for direct probes */
 340         int auth_tries; /* retries for auth req */
 341         int assoc_tries; /* retries for assoc req */
 342
 343         unsigned long request;
 344
 345         unsigned long last_probe;
 346
 347         unsigned int flags;
 348
 349         unsigned int auth_algs; /* bitfield of allowed auth algs */
 350         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 351         int auth_transaction;
 352
 353         unsigned long ibss_join_req;
 354         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 355         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 356
 357         int wmm_last_param_set;
 358         int num_beacons; /* number of TXed beacon frames by this STA */
 359 };
 360
 361 struct ieee80211_if_mesh {
 362         struct work_struct work;
 363         struct timer_list housekeeping_timer;
 364         struct timer_list mesh_path_timer;
 365         struct sk_buff_head skb_queue;
 366
 367         bool housekeeping;
 368
 369         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 370         size_t mesh_id_len;
 371         /* Active Path Selection Protocol Identifier */
 372         u8 mesh_pp_id[4];
 373         /* Active Path Selection Metric Identifier */
 374         u8 mesh_pm_id[4];
 375         /* Congestion Control Mode Identifier */
 376         u8 mesh_cc_id[4];
 377         /* Local mesh Destination Sequence Number */
 378         u32 dsn;
 379         /* Last used PREQ ID */
 380         u32 preq_id;
 381         atomic_t mpaths;
 382         /* Timestamp of last DSN update */
 383         unsigned long last_dsn_update;
 384         /* Timestamp of last DSN sent */
 385         unsigned long last_preq;
 386         struct mesh_rmc *rmc;
 387         spinlock_t mesh_preq_queue_lock;
 388         struct mesh_preq_queue preq_queue;
 389         int preq_queue_len;
 390         struct mesh_stats mshstats;
 391         struct mesh_config mshcfg;
 392         u32 mesh_seqnum;
 393         bool accepting_plinks;
 394         int num_beacons;
 395 };
 396
 397 #ifdef CONFIG_MAC80211_MESH
 398 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 399         do { (msh)->mshstats.name++; } while (0)
 400 #else
 401 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 402         do { } while (0)
 403 #endif
 404
 405 /**
 406  * enum ieee80211_sub_if_data_flags - virtual interface flags
 407  *
 408  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 409  * @IEEE80211_SDATA_PROMISC: interface is promisc
 410  * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
 411  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 412  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 413  *      associated stations and deliver multicast frames both
 414  *      back to wireless media and to the local net stack.
 415  */
 416 enum ieee80211_sub_if_data_flags {
 417         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 418         IEEE80211_SDATA_PROMISC                 = BIT(1),
 419         IEEE80211_SDATA_USERSPACE_MLME          = BIT(2),
 420         IEEE80211_SDATA_OPERATING_GMODE         = BIT(3),
 421         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(4),
 422 };
 423
 424 struct ieee80211_sub_if_data {
 425         struct list_head list;
 426
 427         struct wireless_dev wdev;
 428
 429         /* keys */
 430         struct list_head key_list;
 431
 432         struct net_device *dev;
 433         struct ieee80211_local *local;
 434
 435         unsigned int flags;
 436
 437         int drop_unencrypted;
 438
 439         /*
 440          * basic rates of this AP or the AP we're associated to
 441          */
 442         u64 basic_rates;
 443
 444         /* Fragment table for host-based reassembly */
 445         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 446         unsigned int fragment_next;
 447
 448 #define NUM_DEFAULT_KEYS 4
 449         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 450         struct ieee80211_key *default_key;
 451
 452         /* BSS configuration for this interface. */
 453         struct ieee80211_bss_conf bss_conf;
 454
 455         /*
 456          * AP this belongs to: self in AP mode and
 457          * corresponding AP in VLAN mode, NULL for
 458          * all others (might be needed later in IBSS)
 459          */
 460         struct ieee80211_if_ap *bss;
 461
 462         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 463         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 464
 465         union {
 466                 struct ieee80211_if_ap ap;
 467                 struct ieee80211_if_wds wds;
 468                 struct ieee80211_if_vlan vlan;
 469                 struct ieee80211_if_sta sta;
 470 #ifdef CONFIG_MAC80211_MESH
 471                 struct ieee80211_if_mesh mesh;
 472 #endif
 473                 u32 mntr_flags;
 474         } u;
 475
 476 #ifdef CONFIG_MAC80211_DEBUGFS
 477         struct dentry *debugfsdir;
 478         union {
 479                 struct {
 480                         struct dentry *drop_unencrypted;
 481                         struct dentry *state;
 482                         struct dentry *bssid;
 483                         struct dentry *prev_bssid;
 484                         struct dentry *ssid_len;
 485                         struct dentry *aid;
 486                         struct dentry *ap_capab;
 487                         struct dentry *capab;
 488                         struct dentry *extra_ie_len;
 489                         struct dentry *auth_tries;
 490                         struct dentry *assoc_tries;
 491                         struct dentry *auth_algs;
 492                         struct dentry *auth_alg;
 493                         struct dentry *auth_transaction;
 494                         struct dentry *flags;
 495                         struct dentry *num_beacons_sta;
 496                         struct dentry *force_unicast_rateidx;
 497                         struct dentry *max_ratectrl_rateidx;
 498                 } sta;
 499                 struct {
 500                         struct dentry *drop_unencrypted;
 501                         struct dentry *num_sta_ps;
 502                         struct dentry *dtim_count;
 503                         struct dentry *num_beacons;
 504                         struct dentry *force_unicast_rateidx;
 505                         struct dentry *max_ratectrl_rateidx;
 506                         struct dentry *num_buffered_multicast;
 507                 } ap;
 508                 struct {
 509                         struct dentry *drop_unencrypted;
 510                         struct dentry *peer;
 511                         struct dentry *force_unicast_rateidx;
 512                         struct dentry *max_ratectrl_rateidx;
 513                 } wds;
 514                 struct {
 515                         struct dentry *drop_unencrypted;
 516                         struct dentry *force_unicast_rateidx;
 517                         struct dentry *max_ratectrl_rateidx;
 518                 } vlan;
 519                 struct {
 520                         struct dentry *mode;
 521                 } monitor;
 522         } debugfs;
 523         struct {
 524                 struct dentry *default_key;
 525         } common_debugfs;
 526
 527 #ifdef CONFIG_MAC80211_MESH
 528         struct dentry *mesh_stats_dir;
 529         struct {
 530                 struct dentry *fwded_frames;
 531                 struct dentry *dropped_frames_ttl;
 532                 struct dentry *dropped_frames_no_route;
 533                 struct dentry *estab_plinks;
 534                 struct timer_list mesh_path_timer;
 535         } mesh_stats;
 536
 537         struct dentry *mesh_config_dir;
 538         struct {
 539                 struct dentry *dot11MeshRetryTimeout;
 540                 struct dentry *dot11MeshConfirmTimeout;
 541                 struct dentry *dot11MeshHoldingTimeout;
 542                 struct dentry *dot11MeshMaxRetries;
 543                 struct dentry *dot11MeshTTL;
 544                 struct dentry *auto_open_plinks;
 545                 struct dentry *dot11MeshMaxPeerLinks;
 546                 struct dentry *dot11MeshHWMPactivePathTimeout;
 547                 struct dentry *dot11MeshHWMPpreqMinInterval;
 548                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 549                 struct dentry *dot11MeshHWMPmaxPREQretries;
 550                 struct dentry *path_refresh_time;
 551                 struct dentry *min_discovery_timeout;
 552         } mesh_config;
 553 #endif
 554
 555 #endif
 556         /* must be last, dynamically sized area in this! */
 557         struct ieee80211_vif vif;
 558 };
 559
 560 static inline
 561 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 562 {
 563         return container_of(p, struct ieee80211_sub_if_data, vif);
 564 }
 565
 566 static inline void
 567 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 568                             u8 mesh_id_len, u8 *mesh_id)
 569 {
 570 #ifdef CONFIG_MAC80211_MESH
 571         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 572         ifmsh->mesh_id_len = mesh_id_len;
 573         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 574 #else
 575         WARN_ON(1);
 576 #endif
 577 }
 578
 579 enum {
 580         IEEE80211_RX_MSG        = 1,
 581         IEEE80211_TX_STATUS_MSG = 2,
 582         IEEE80211_DELBA_MSG     = 3,
 583         IEEE80211_ADDBA_MSG     = 4,
 584 };
 585
 586 /* maximum number of hardware queues we support. */
 587 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 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         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 598
 599         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 600         int open_count;
 601         int monitors, cooked_mntrs;
 602         /* number of interfaces with corresponding FIF_ flags */
 603         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 604         unsigned int filter_flags; /* FIF_* */
 605         struct iw_statistics wstats;
 606         u8 wstats_flags;
 607         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 608         int tx_headroom; /* required headroom for hardware/radiotap */
 609
 610         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 611          * added to skb_queue will be processed, but frames in
 612          * skb_queue_unreliable may be dropped if the total length of these
 613          * queues increases over the limit. */
 614 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 615         struct tasklet_struct tasklet;
 616         struct sk_buff_head skb_queue;
 617         struct sk_buff_head skb_queue_unreliable;
 618
 619         /* Station data */
 620         /*
 621          * The lock only protects the list, hash, timer and counter
 622          * against manipulation, reads are done in RCU. Additionally,
 623          * the lock protects each BSS's TIM bitmap.
 624          */
 625         spinlock_t sta_lock;
 626         unsigned long num_sta;
 627         struct list_head sta_list;
 628         struct list_head sta_flush_list;
 629         struct work_struct sta_flush_work;
 630         struct sta_info *sta_hash[STA_HASH_SIZE];
 631         struct timer_list sta_cleanup;
 632
 633         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 634         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 635         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 636         struct tasklet_struct tx_pending_tasklet;
 637
 638         /* number of interfaces with corresponding IFF_ flags */
 639         atomic_t iff_allmultis, iff_promiscs;
 640
 641         struct rate_control_ref *rate_ctrl;
 642
 643         int rts_threshold;
 644         int fragmentation_threshold;
 645         int short_retry_limit; /* dot11ShortRetryLimit */
 646         int long_retry_limit; /* dot11LongRetryLimit */
 647
 648         struct crypto_blkcipher *wep_tx_tfm;
 649         struct crypto_blkcipher *wep_rx_tfm;
 650         u32 wep_iv;
 651
 652         struct list_head interfaces;
 653
 654         /*
 655          * Key lock, protects sdata's key_list and sta_info's
 656          * key pointers (write access, they're RCU.)
 657          */
 658         spinlock_t key_lock;
 659
 660
 661         /* Scanning and BSS list */
 662         bool sw_scanning, hw_scanning;
 663         int scan_channel_idx;
 664         enum ieee80211_band scan_band;
 665
 666         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 667         unsigned long last_scan_completed;
 668         struct delayed_work scan_work;
 669         struct ieee80211_sub_if_data *scan_sdata;
 670         struct ieee80211_channel *oper_channel, *scan_channel;
 671         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 672         size_t scan_ssid_len;
 673         struct list_head bss_list;
 674         struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
 675         spinlock_t bss_lock;
 676
 677         /* SNMP counters */
 678         /* dot11CountersTable */
 679         u32 dot11TransmittedFragmentCount;
 680         u32 dot11MulticastTransmittedFrameCount;
 681         u32 dot11FailedCount;
 682         u32 dot11RetryCount;
 683         u32 dot11MultipleRetryCount;
 684         u32 dot11FrameDuplicateCount;
 685         u32 dot11ReceivedFragmentCount;
 686         u32 dot11MulticastReceivedFrameCount;
 687         u32 dot11TransmittedFrameCount;
 688         u32 dot11WEPUndecryptableCount;
 689
 690 #ifdef CONFIG_MAC80211_LEDS
 691         int tx_led_counter, rx_led_counter;
 692         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 693         char tx_led_name[32], rx_led_name[32],
 694              assoc_led_name[32], radio_led_name[32];
 695 #endif
 696
 697 #ifdef CONFIG_MAC80211_DEBUGFS
 698         struct work_struct sta_debugfs_add;
 699 #endif
 700
 701 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 702         /* TX/RX handler statistics */
 703         unsigned int tx_handlers_drop;
 704         unsigned int tx_handlers_queued;
 705         unsigned int tx_handlers_drop_unencrypted;
 706         unsigned int tx_handlers_drop_fragment;
 707         unsigned int tx_handlers_drop_wep;
 708         unsigned int tx_handlers_drop_not_assoc;
 709         unsigned int tx_handlers_drop_unauth_port;
 710         unsigned int rx_handlers_drop;
 711         unsigned int rx_handlers_queued;
 712         unsigned int rx_handlers_drop_nullfunc;
 713         unsigned int rx_handlers_drop_defrag;
 714         unsigned int rx_handlers_drop_short;
 715         unsigned int rx_handlers_drop_passive_scan;
 716         unsigned int tx_expand_skb_head;
 717         unsigned int tx_expand_skb_head_cloned;
 718         unsigned int rx_expand_skb_head;
 719         unsigned int rx_expand_skb_head2;
 720         unsigned int rx_handlers_fragments;
 721         unsigned int tx_status_drop;
 722 #define I802_DEBUG_INC(c) (c)++
 723 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 724 #define I802_DEBUG_INC(c) do { } while (0)
 725 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 726
 727
 728         int total_ps_buffered; /* total number of all buffered unicast and
 729                                 * multicast packets for power saving stations
 730                                 */
 731         int wifi_wme_noack_test;
 732         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 733
 734 #ifdef CONFIG_MAC80211_DEBUGFS
 735         struct local_debugfsdentries {
 736                 struct dentry *frequency;
 737                 struct dentry *antenna_sel_tx;
 738                 struct dentry *antenna_sel_rx;
 739                 struct dentry *rts_threshold;
 740                 struct dentry *fragmentation_threshold;
 741                 struct dentry *short_retry_limit;
 742                 struct dentry *long_retry_limit;
 743                 struct dentry *total_ps_buffered;
 744                 struct dentry *wep_iv;
 745                 struct dentry *statistics;
 746                 struct local_debugfsdentries_statsdentries {
 747                         struct dentry *transmitted_fragment_count;
 748                         struct dentry *multicast_transmitted_frame_count;
 749                         struct dentry *failed_count;
 750                         struct dentry *retry_count;
 751                         struct dentry *multiple_retry_count;
 752                         struct dentry *frame_duplicate_count;
 753                         struct dentry *received_fragment_count;
 754                         struct dentry *multicast_received_frame_count;
 755                         struct dentry *transmitted_frame_count;
 756                         struct dentry *wep_undecryptable_count;
 757                         struct dentry *num_scans;
 758 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 759                         struct dentry *tx_handlers_drop;
 760                         struct dentry *tx_handlers_queued;
 761                         struct dentry *tx_handlers_drop_unencrypted;
 762                         struct dentry *tx_handlers_drop_fragment;
 763                         struct dentry *tx_handlers_drop_wep;
 764                         struct dentry *tx_handlers_drop_not_assoc;
 765                         struct dentry *tx_handlers_drop_unauth_port;
 766                         struct dentry *rx_handlers_drop;
 767                         struct dentry *rx_handlers_queued;
 768                         struct dentry *rx_handlers_drop_nullfunc;
 769                         struct dentry *rx_handlers_drop_defrag;
 770                         struct dentry *rx_handlers_drop_short;
 771                         struct dentry *rx_handlers_drop_passive_scan;
 772                         struct dentry *tx_expand_skb_head;
 773                         struct dentry *tx_expand_skb_head_cloned;
 774                         struct dentry *rx_expand_skb_head;
 775                         struct dentry *rx_expand_skb_head2;
 776                         struct dentry *rx_handlers_fragments;
 777                         struct dentry *tx_status_drop;
 778 #endif
 779                         struct dentry *dot11ACKFailureCount;
 780                         struct dentry *dot11RTSFailureCount;
 781                         struct dentry *dot11FCSErrorCount;
 782                         struct dentry *dot11RTSSuccessCount;
 783                 } stats;
 784                 struct dentry *stations;
 785                 struct dentry *keys;
 786         } debugfs;
 787 #endif
 788 };
 789
 790 static inline struct ieee80211_sub_if_data *
 791 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 792 {
 793         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 794
 795         BUG_ON(!local || local->mdev == dev);
 796
 797         return netdev_priv(dev);
 798 }
 799
 800 /* this struct represents 802.11n's RA/TID combination */
 801 struct ieee80211_ra_tid {
 802         u8 ra[ETH_ALEN];
 803         u16 tid;
 804 };
 805
 806 /* Parsed Information Elements */
 807 struct ieee802_11_elems {
 808         u8 *ie_start;
 809         size_t total_len;
 810
 811         /* pointers to IEs */
 812         u8 *ssid;
 813         u8 *supp_rates;
 814         u8 *fh_params;
 815         u8 *ds_params;
 816         u8 *cf_params;
 817         u8 *tim;
 818         u8 *ibss_params;
 819         u8 *challenge;
 820         u8 *wpa;
 821         u8 *rsn;
 822         u8 *erp_info;
 823         u8 *ext_supp_rates;
 824         u8 *wmm_info;
 825         u8 *wmm_param;
 826         u8 *ht_cap_elem;
 827         u8 *ht_info_elem;
 828         u8 *mesh_config;
 829         u8 *mesh_id;
 830         u8 *peer_link;
 831         u8 *preq;
 832         u8 *prep;
 833         u8 *perr;
 834         u8 *ch_switch_elem;
 835         u8 *country_elem;
 836         u8 *pwr_constr_elem;
 837         u8 *quiet_elem;         /* first quite element */
 838
 839         /* length of them, respectively */
 840         u8 ssid_len;
 841         u8 supp_rates_len;
 842         u8 fh_params_len;
 843         u8 ds_params_len;
 844         u8 cf_params_len;
 845         u8 tim_len;
 846         u8 ibss_params_len;
 847         u8 challenge_len;
 848         u8 wpa_len;
 849         u8 rsn_len;
 850         u8 erp_info_len;
 851         u8 ext_supp_rates_len;
 852         u8 wmm_info_len;
 853         u8 wmm_param_len;
 854         u8 ht_cap_elem_len;
 855         u8 ht_info_elem_len;
 856         u8 mesh_config_len;
 857         u8 mesh_id_len;
 858         u8 peer_link_len;
 859         u8 preq_len;
 860         u8 prep_len;
 861         u8 perr_len;
 862         u8 ch_switch_elem_len;
 863         u8 country_elem_len;
 864         u8 pwr_constr_elem_len;
 865         u8 quiet_elem_len;
 866         u8 num_of_quiet_elem;   /* can be more the one */
 867 };
 868
 869 static inline struct ieee80211_local *hw_to_local(
 870         struct ieee80211_hw *hw)
 871 {
 872         return container_of(hw, struct ieee80211_local, hw);
 873 }
 874
 875 static inline struct ieee80211_hw *local_to_hw(
 876         struct ieee80211_local *local)
 877 {
 878         return &local->hw;
 879 }
 880
 881 struct sta_attribute {
 882         struct attribute attr;
 883         ssize_t (*show)(const struct sta_info *, char *buf);
 884         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 885 };
 886
 887 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 888 {
 889         return compare_ether_addr(raddr, addr) == 0 ||
 890                is_broadcast_ether_addr(raddr);
 891 }
 892
 893
 894 int ieee80211_hw_config(struct ieee80211_local *local);
 895 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 896 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 897 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 898                         struct ieee80211_ht_info *req_ht_cap,
 899                         struct ieee80211_ht_bss_info *req_bss_cap);
 900 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 901                                       u32 changed);
 902
 903 /* wireless extensions */
 904 extern const struct iw_handler_def ieee80211_iw_handler_def;
 905
 906 /* STA/IBSS code */
 907 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 908 void ieee80211_scan_work(struct work_struct *work);
 909 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 910                            struct ieee80211_rx_status *rx_status);
 911 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 912 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 913 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 914 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 915                             struct ieee80211_if_sta *ifsta);
 916 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 917                                         struct sk_buff *skb, u8 *bssid,
 918                                         u8 *addr, u64 supp_rates);
 919 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 920 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 921 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 922 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 923                             struct ieee802_11_elems *elems,
 924                             enum ieee80211_band band);
 925 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 926                               u8 *ssid, size_t ssid_len);
 927
 928 /* scan/BSS handling */
 929 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 930                            u8 *ssid, size_t ssid_len);
 931 int ieee80211_scan_results(struct ieee80211_local *local,
 932                            struct iw_request_info *info,
 933                            char *buf, size_t len);
 934 ieee80211_rx_result
 935 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
 936                   struct sk_buff *skb,
 937                   struct ieee80211_rx_status *rx_status);
 938 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 939 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 940 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 941                                char *ie, size_t len);
 942
 943 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 944 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 945                          u8 *ssid, size_t ssid_len);
 946 struct ieee80211_bss *
 947 ieee80211_bss_info_update(struct ieee80211_local *local,
 948                           struct ieee80211_rx_status *rx_status,
 949                           struct ieee80211_mgmt *mgmt,
 950                           size_t len,
 951                           struct ieee802_11_elems *elems,
 952                           int freq, bool beacon);
 953 struct ieee80211_bss *
 954 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
 955                      u8 *ssid, u8 ssid_len);
 956 struct ieee80211_bss *
 957 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 958                      u8 *ssid, u8 ssid_len);
 959 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 960                           struct ieee80211_bss *bss);
 961
 962 /* interface handling */
 963 void ieee80211_if_setup(struct net_device *dev);
 964 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 965                      struct net_device **new_dev, enum ieee80211_if_types type,
 966                      struct vif_params *params);
 967 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 968                              enum ieee80211_if_types type);
 969 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 970 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 971
 972 /* tx handling */
 973 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 974 void ieee80211_tx_pending(unsigned long data);
 975 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 976 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 977 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 978
 979 /* HT */
 980 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 981                                    struct ieee80211_ht_info *ht_info);
 982 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 983                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 984                         struct ieee80211_ht_bss_info *bss_info);
 985 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 986
 987 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 988                                 u16 tid, u16 initiator, u16 reason);
 989 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 990 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 991                              struct sta_info *sta,
 992                              struct ieee80211_mgmt *mgmt, size_t len);
 993 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 994                                   struct sta_info *sta,
 995                                   struct ieee80211_mgmt *mgmt,
 996                                   size_t len);
 997 void ieee80211_process_addba_request(struct ieee80211_local *local,
 998                                      struct sta_info *sta,
 999                                      struct ieee80211_mgmt *mgmt,
1000                                      size_t len);
1001
1002 /* Spectrum management */
1003 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1004                                        struct ieee80211_mgmt *mgmt,
1005                                        size_t len);
1006
1007 /* utility functions/constants */
1008 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1009 extern const unsigned char rfc1042_header[6];
1010 extern const unsigned char bridge_tunnel_header[6];
1011 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1012                         enum ieee80211_if_types type);
1013 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1014                              int rate, int erp, int short_preamble);
1015 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1016                                      struct ieee80211_hdr *hdr);
1017 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1018 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1019                       int encrypt);
1020 void ieee802_11_parse_elems(u8 *start, size_t len,
1021                             struct ieee802_11_elems *elems);
1022 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1023
1024 #ifdef CONFIG_MAC80211_NOINLINE
1025 #define debug_noinline noinline
1026 #else
1027 #define debug_noinline
1028 #endif
1029
1030 #endif /* IEEE80211_I_H */