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 struct ieee80211_fragment_entry {
  61         unsigned long first_frag_time;
  62         unsigned int seq;
  63         unsigned int rx_queue;
  64         unsigned int last_frag;
  65         unsigned int extra_len;
  66         struct sk_buff_head skb_list;
  67         int ccmp; /* Whether fragments were encrypted with CCMP */
  68         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  69 };
  70
  71
  72 struct ieee80211_bss {
  73         struct list_head list;
  74         struct ieee80211_bss *hnext;
  75         size_t ssid_len;
  76
  77         atomic_t users;
  78
  79         u8 bssid[ETH_ALEN];
  80         u8 ssid[IEEE80211_MAX_SSID_LEN];
  81         u8 dtim_period;
  82         u16 capability; /* host byte order */
  83         enum ieee80211_band band;
  84         int freq;
  85         int signal, noise, qual;
  86         u8 *ies; /* all information elements from the last Beacon or Probe
  87                   * Response frames; note Beacon frame is not allowed to
  88                   * override values from Probe Response */
  89         size_t ies_len;
  90         bool wmm_used;
  91 #ifdef CONFIG_MAC80211_MESH
  92         u8 *mesh_id;
  93         size_t mesh_id_len;
  94         u8 *mesh_cfg;
  95 #endif
  96 #define IEEE80211_MAX_SUPP_RATES 32
  97         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  98         size_t supp_rates_len;
  99         u64 timestamp;
 100         int beacon_int;
 101
 102         unsigned long last_probe_resp;
 103         unsigned long last_update;
 104
 105         /* during assocation, we save an ERP value from a probe response so
 106          * that we can feed ERP info to the driver when handling the
 107          * association completes. these fields probably won't be up-to-date
 108          * otherwise, you probably don't want to use them. */
 109         int has_erp_value;
 110         u8 erp_value;
 111 };
 112
 113 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 114 {
 115 #ifdef CONFIG_MAC80211_MESH
 116         return bss->mesh_cfg;
 117 #endif
 118         return NULL;
 119 }
 120
 121 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 122 {
 123 #ifdef CONFIG_MAC80211_MESH
 124         return bss->mesh_id;
 125 #endif
 126         return NULL;
 127 }
 128
 129 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 130 {
 131 #ifdef CONFIG_MAC80211_MESH
 132         return bss->mesh_id_len;
 133 #endif
 134         return 0;
 135 }
 136
 137
 138 typedef unsigned __bitwise__ ieee80211_tx_result;
 139 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 140 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 141 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 142
 143 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 144 #define IEEE80211_TX_UNICAST            BIT(1)
 145 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 146
 147 struct ieee80211_tx_data {
 148         struct sk_buff *skb;
 149         struct net_device *dev;
 150         struct ieee80211_local *local;
 151         struct ieee80211_sub_if_data *sdata;
 152         struct sta_info *sta;
 153         struct ieee80211_key *key;
 154
 155         struct ieee80211_channel *channel;
 156
 157         /* Extra fragments (in addition to the first fragment
 158          * in skb) */
 159         struct sk_buff **extra_frag;
 160         int num_extra_frag;
 161
 162         u16 ethertype;
 163         unsigned int flags;
 164 };
 165
 166
 167 typedef unsigned __bitwise__ ieee80211_rx_result;
 168 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 169 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 170 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 171 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 172
 173 #define IEEE80211_RX_IN_SCAN            BIT(0)
 174 /* frame is destined to interface currently processed (incl. multicast frames) */
 175 #define IEEE80211_RX_RA_MATCH           BIT(1)
 176 #define IEEE80211_RX_AMSDU              BIT(2)
 177 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 178 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 179
 180 struct ieee80211_rx_data {
 181         struct sk_buff *skb;
 182         struct net_device *dev;
 183         struct ieee80211_local *local;
 184         struct ieee80211_sub_if_data *sdata;
 185         struct sta_info *sta;
 186         struct ieee80211_key *key;
 187         struct ieee80211_rx_status *status;
 188         struct ieee80211_rate *rate;
 189
 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         /* yes, this looks ugly, but guarantees that we can later use
 215          * bitmap_empty :)
 216          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 217         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 218         struct sk_buff_head ps_bc_buf;
 219         atomic_t num_sta_ps; /* number of stations in PS mode */
 220         int dtim_count;
 221 };
 222
 223 struct ieee80211_if_wds {
 224         struct sta_info *sta;
 225         u8 remote_addr[ETH_ALEN];
 226 };
 227
 228 struct ieee80211_if_vlan {
 229         struct list_head list;
 230 };
 231
 232 struct mesh_stats {
 233         __u32 fwded_frames;             /* Mesh forwarded frames */
 234         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 235         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 236         atomic_t estab_plinks;
 237 };
 238
 239 #define PREQ_Q_F_START          0x1
 240 #define PREQ_Q_F_REFRESH        0x2
 241 struct mesh_preq_queue {
 242         struct list_head list;
 243         u8 dst[ETH_ALEN];
 244         u8 flags;
 245 };
 246
 247 /* flags used in struct ieee80211_if_sta.flags */
 248 #define IEEE80211_STA_SSID_SET          BIT(0)
 249 #define IEEE80211_STA_BSSID_SET         BIT(1)
 250 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 251 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 252 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 253 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 254 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 255 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 256 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 257 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 258 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 259 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 260 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 261 #define IEEE80211_STA_TKIP_WEP_USED     BIT(14)
 262 #define IEEE80211_STA_CSA_RECEIVED      BIT(15)
 263 #define IEEE80211_STA_MFP_ENABLED       BIT(16)
 264 /* flags for MLME request */
 265 #define IEEE80211_STA_REQ_SCAN 0
 266 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 267 #define IEEE80211_STA_REQ_AUTH 2
 268 #define IEEE80211_STA_REQ_RUN  3
 269
 270 /* STA/IBSS MLME states */
 271 enum ieee80211_sta_mlme_state {
 272         IEEE80211_STA_MLME_DISABLED,
 273         IEEE80211_STA_MLME_DIRECT_PROBE,
 274         IEEE80211_STA_MLME_AUTHENTICATE,
 275         IEEE80211_STA_MLME_ASSOCIATE,
 276         IEEE80211_STA_MLME_ASSOCIATED,
 277         IEEE80211_STA_MLME_IBSS_SEARCH,
 278         IEEE80211_STA_MLME_IBSS_JOINED,
 279 };
 280
 281 /* bitfield of allowed auth algs */
 282 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 283 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 284 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 285
 286 struct ieee80211_if_sta {
 287         struct timer_list timer;
 288         struct timer_list chswitch_timer;
 289         struct work_struct work;
 290         struct work_struct chswitch_work;
 291         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 292         u8 ssid[IEEE80211_MAX_SSID_LEN];
 293         enum ieee80211_sta_mlme_state state;
 294         size_t ssid_len;
 295         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 296         size_t scan_ssid_len;
 297         u16 aid;
 298         u16 ap_capab, capab;
 299         u8 *extra_ie; /* to be added to the end of AssocReq */
 300         size_t extra_ie_len;
 301
 302         /* The last AssocReq/Resp IEs */
 303         u8 *assocreq_ies, *assocresp_ies;
 304         size_t assocreq_ies_len, assocresp_ies_len;
 305
 306         struct sk_buff_head skb_queue;
 307
 308         int assoc_scan_tries; /* number of scans done pre-association */
 309         int direct_probe_tries; /* retries for direct probes */
 310         int auth_tries; /* retries for auth req */
 311         int assoc_tries; /* retries for assoc req */
 312
 313         unsigned long request;
 314
 315         unsigned long last_probe;
 316
 317         unsigned int flags;
 318
 319         unsigned int auth_algs; /* bitfield of allowed auth algs */
 320         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 321         int auth_transaction;
 322
 323         enum {
 324                 IEEE80211_MFP_DISABLED,
 325                 IEEE80211_MFP_OPTIONAL,
 326                 IEEE80211_MFP_REQUIRED
 327         } mfp; /* management frame protection */
 328
 329         unsigned long ibss_join_req;
 330         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 331         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 332
 333         int wmm_last_param_set;
 334 };
 335
 336 struct ieee80211_if_mesh {
 337         struct work_struct work;
 338         struct timer_list housekeeping_timer;
 339         struct timer_list mesh_path_timer;
 340         struct sk_buff_head skb_queue;
 341
 342         bool housekeeping;
 343
 344         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 345         size_t mesh_id_len;
 346         /* Active Path Selection Protocol Identifier */
 347         u8 mesh_pp_id[4];
 348         /* Active Path Selection Metric Identifier */
 349         u8 mesh_pm_id[4];
 350         /* Congestion Control Mode Identifier */
 351         u8 mesh_cc_id[4];
 352         /* Local mesh Destination Sequence Number */
 353         u32 dsn;
 354         /* Last used PREQ ID */
 355         u32 preq_id;
 356         atomic_t mpaths;
 357         /* Timestamp of last DSN update */
 358         unsigned long last_dsn_update;
 359         /* Timestamp of last DSN sent */
 360         unsigned long last_preq;
 361         struct mesh_rmc *rmc;
 362         spinlock_t mesh_preq_queue_lock;
 363         struct mesh_preq_queue preq_queue;
 364         int preq_queue_len;
 365         struct mesh_stats mshstats;
 366         struct mesh_config mshcfg;
 367         u32 mesh_seqnum;
 368         bool accepting_plinks;
 369 };
 370
 371 #ifdef CONFIG_MAC80211_MESH
 372 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 373         do { (msh)->mshstats.name++; } while (0)
 374 #else
 375 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 376         do { } while (0)
 377 #endif
 378
 379 /**
 380  * enum ieee80211_sub_if_data_flags - virtual interface flags
 381  *
 382  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 383  * @IEEE80211_SDATA_PROMISC: interface is promisc
 384  * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
 385  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 386  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 387  *      associated stations and deliver multicast frames both
 388  *      back to wireless media and to the local net stack.
 389  */
 390 enum ieee80211_sub_if_data_flags {
 391         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 392         IEEE80211_SDATA_PROMISC                 = BIT(1),
 393         IEEE80211_SDATA_USERSPACE_MLME          = BIT(2),
 394         IEEE80211_SDATA_OPERATING_GMODE         = BIT(3),
 395         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(4),
 396 };
 397
 398 struct ieee80211_sub_if_data {
 399         struct list_head list;
 400
 401         struct wireless_dev wdev;
 402
 403         /* keys */
 404         struct list_head key_list;
 405
 406         struct net_device *dev;
 407         struct ieee80211_local *local;
 408
 409         unsigned int flags;
 410
 411         int drop_unencrypted;
 412
 413         /* Fragment table for host-based reassembly */
 414         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 415         unsigned int fragment_next;
 416
 417 #define NUM_DEFAULT_KEYS 4
 418 #define NUM_DEFAULT_MGMT_KEYS 2
 419         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 420         struct ieee80211_key *default_key;
 421         struct ieee80211_key *default_mgmt_key;
 422
 423         u16 sequence_number;
 424
 425         /*
 426          * AP this belongs to: self in AP mode and
 427          * corresponding AP in VLAN mode, NULL for
 428          * all others (might be needed later in IBSS)
 429          */
 430         struct ieee80211_if_ap *bss;
 431
 432         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 433         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 434
 435         union {
 436                 struct ieee80211_if_ap ap;
 437                 struct ieee80211_if_wds wds;
 438                 struct ieee80211_if_vlan vlan;
 439                 struct ieee80211_if_sta sta;
 440 #ifdef CONFIG_MAC80211_MESH
 441                 struct ieee80211_if_mesh mesh;
 442 #endif
 443                 u32 mntr_flags;
 444         } u;
 445
 446 #ifdef CONFIG_MAC80211_DEBUGFS
 447         struct dentry *debugfsdir;
 448         union {
 449                 struct {
 450                         struct dentry *drop_unencrypted;
 451                         struct dentry *state;
 452                         struct dentry *bssid;
 453                         struct dentry *prev_bssid;
 454                         struct dentry *ssid_len;
 455                         struct dentry *aid;
 456                         struct dentry *ap_capab;
 457                         struct dentry *capab;
 458                         struct dentry *extra_ie_len;
 459                         struct dentry *auth_tries;
 460                         struct dentry *assoc_tries;
 461                         struct dentry *auth_algs;
 462                         struct dentry *auth_alg;
 463                         struct dentry *auth_transaction;
 464                         struct dentry *flags;
 465                         struct dentry *force_unicast_rateidx;
 466                         struct dentry *max_ratectrl_rateidx;
 467                 } sta;
 468                 struct {
 469                         struct dentry *drop_unencrypted;
 470                         struct dentry *num_sta_ps;
 471                         struct dentry *dtim_count;
 472                         struct dentry *force_unicast_rateidx;
 473                         struct dentry *max_ratectrl_rateidx;
 474                         struct dentry *num_buffered_multicast;
 475                 } ap;
 476                 struct {
 477                         struct dentry *drop_unencrypted;
 478                         struct dentry *peer;
 479                         struct dentry *force_unicast_rateidx;
 480                         struct dentry *max_ratectrl_rateidx;
 481                 } wds;
 482                 struct {
 483                         struct dentry *drop_unencrypted;
 484                         struct dentry *force_unicast_rateidx;
 485                         struct dentry *max_ratectrl_rateidx;
 486                 } vlan;
 487                 struct {
 488                         struct dentry *mode;
 489                 } monitor;
 490         } debugfs;
 491         struct {
 492                 struct dentry *default_key;
 493                 struct dentry *default_mgmt_key;
 494         } common_debugfs;
 495
 496 #ifdef CONFIG_MAC80211_MESH
 497         struct dentry *mesh_stats_dir;
 498         struct {
 499                 struct dentry *fwded_frames;
 500                 struct dentry *dropped_frames_ttl;
 501                 struct dentry *dropped_frames_no_route;
 502                 struct dentry *estab_plinks;
 503                 struct timer_list mesh_path_timer;
 504         } mesh_stats;
 505
 506         struct dentry *mesh_config_dir;
 507         struct {
 508                 struct dentry *dot11MeshRetryTimeout;
 509                 struct dentry *dot11MeshConfirmTimeout;
 510                 struct dentry *dot11MeshHoldingTimeout;
 511                 struct dentry *dot11MeshMaxRetries;
 512                 struct dentry *dot11MeshTTL;
 513                 struct dentry *auto_open_plinks;
 514                 struct dentry *dot11MeshMaxPeerLinks;
 515                 struct dentry *dot11MeshHWMPactivePathTimeout;
 516                 struct dentry *dot11MeshHWMPpreqMinInterval;
 517                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 518                 struct dentry *dot11MeshHWMPmaxPREQretries;
 519                 struct dentry *path_refresh_time;
 520                 struct dentry *min_discovery_timeout;
 521         } mesh_config;
 522 #endif
 523
 524 #endif
 525         /* must be last, dynamically sized area in this! */
 526         struct ieee80211_vif vif;
 527 };
 528
 529 static inline
 530 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 531 {
 532         return container_of(p, struct ieee80211_sub_if_data, vif);
 533 }
 534
 535 static inline void
 536 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 537                             u8 mesh_id_len, u8 *mesh_id)
 538 {
 539 #ifdef CONFIG_MAC80211_MESH
 540         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 541         ifmsh->mesh_id_len = mesh_id_len;
 542         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 543 #else
 544         WARN_ON(1);
 545 #endif
 546 }
 547
 548 enum {
 549         IEEE80211_RX_MSG        = 1,
 550         IEEE80211_TX_STATUS_MSG = 2,
 551         IEEE80211_DELBA_MSG     = 3,
 552         IEEE80211_ADDBA_MSG     = 4,
 553 };
 554
 555 enum queue_stop_reason {
 556         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 557         IEEE80211_QUEUE_STOP_REASON_PS,
 558         IEEE80211_QUEUE_STOP_REASON_CSA
 559 };
 560
 561 /* maximum number of hardware queues we support. */
 562 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 563
 564 struct ieee80211_master_priv {
 565         struct ieee80211_local *local;
 566 };
 567
 568 struct ieee80211_local {
 569         /* embed the driver visible part.
 570          * don't cast (use the static inlines below), but we keep
 571          * it first anyway so they become a no-op */
 572         struct ieee80211_hw hw;
 573
 574         const struct ieee80211_ops *ops;
 575
 576         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 577         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 578         spinlock_t queue_stop_reason_lock;
 579         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 580         int open_count;
 581         int monitors, cooked_mntrs;
 582         /* number of interfaces with corresponding FIF_ flags */
 583         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 584         unsigned int filter_flags; /* FIF_* */
 585         struct iw_statistics wstats;
 586         u8 wstats_flags;
 587         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 588         int tx_headroom; /* required headroom for hardware/radiotap */
 589
 590         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 591          * added to skb_queue will be processed, but frames in
 592          * skb_queue_unreliable may be dropped if the total length of these
 593          * queues increases over the limit. */
 594 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 595         struct tasklet_struct tasklet;
 596         struct sk_buff_head skb_queue;
 597         struct sk_buff_head skb_queue_unreliable;
 598
 599         /* Station data */
 600         /*
 601          * The lock only protects the list, hash, timer and counter
 602          * against manipulation, reads are done in RCU. Additionally,
 603          * the lock protects each BSS's TIM bitmap.
 604          */
 605         spinlock_t sta_lock;
 606         unsigned long num_sta;
 607         struct list_head sta_list;
 608         struct list_head sta_flush_list;
 609         struct work_struct sta_flush_work;
 610         struct sta_info *sta_hash[STA_HASH_SIZE];
 611         struct timer_list sta_cleanup;
 612
 613         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 614         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 615         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 616         struct tasklet_struct tx_pending_tasklet;
 617
 618         /* number of interfaces with corresponding IFF_ flags */
 619         atomic_t iff_allmultis, iff_promiscs;
 620
 621         struct rate_control_ref *rate_ctrl;
 622
 623         int rts_threshold;
 624         int fragmentation_threshold;
 625
 626         struct crypto_blkcipher *wep_tx_tfm;
 627         struct crypto_blkcipher *wep_rx_tfm;
 628         u32 wep_iv;
 629
 630         struct list_head interfaces;
 631
 632         /*
 633          * Key lock, protects sdata's key_list and sta_info's
 634          * key pointers (write access, they're RCU.)
 635          */
 636         spinlock_t key_lock;
 637
 638
 639         /* Scanning and BSS list */
 640         bool sw_scanning, hw_scanning;
 641         int scan_channel_idx;
 642         enum ieee80211_band scan_band;
 643
 644         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 645         unsigned long last_scan_completed;
 646         struct delayed_work scan_work;
 647         struct ieee80211_sub_if_data *scan_sdata;
 648         struct ieee80211_channel *oper_channel, *scan_channel, *csa_channel;
 649         enum nl80211_channel_type oper_channel_type;
 650         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 651         size_t scan_ssid_len;
 652         struct list_head bss_list;
 653         struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
 654         spinlock_t bss_lock;
 655
 656         /* SNMP counters */
 657         /* dot11CountersTable */
 658         u32 dot11TransmittedFragmentCount;
 659         u32 dot11MulticastTransmittedFrameCount;
 660         u32 dot11FailedCount;
 661         u32 dot11RetryCount;
 662         u32 dot11MultipleRetryCount;
 663         u32 dot11FrameDuplicateCount;
 664         u32 dot11ReceivedFragmentCount;
 665         u32 dot11MulticastReceivedFrameCount;
 666         u32 dot11TransmittedFrameCount;
 667
 668 #ifdef CONFIG_MAC80211_LEDS
 669         int tx_led_counter, rx_led_counter;
 670         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 671         char tx_led_name[32], rx_led_name[32],
 672              assoc_led_name[32], radio_led_name[32];
 673 #endif
 674
 675 #ifdef CONFIG_MAC80211_DEBUGFS
 676         struct work_struct sta_debugfs_add;
 677 #endif
 678
 679 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 680         /* TX/RX handler statistics */
 681         unsigned int tx_handlers_drop;
 682         unsigned int tx_handlers_queued;
 683         unsigned int tx_handlers_drop_unencrypted;
 684         unsigned int tx_handlers_drop_fragment;
 685         unsigned int tx_handlers_drop_wep;
 686         unsigned int tx_handlers_drop_not_assoc;
 687         unsigned int tx_handlers_drop_unauth_port;
 688         unsigned int rx_handlers_drop;
 689         unsigned int rx_handlers_queued;
 690         unsigned int rx_handlers_drop_nullfunc;
 691         unsigned int rx_handlers_drop_defrag;
 692         unsigned int rx_handlers_drop_short;
 693         unsigned int rx_handlers_drop_passive_scan;
 694         unsigned int tx_expand_skb_head;
 695         unsigned int tx_expand_skb_head_cloned;
 696         unsigned int rx_expand_skb_head;
 697         unsigned int rx_expand_skb_head2;
 698         unsigned int rx_handlers_fragments;
 699         unsigned int tx_status_drop;
 700 #define I802_DEBUG_INC(c) (c)++
 701 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 702 #define I802_DEBUG_INC(c) do { } while (0)
 703 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 704
 705
 706         int total_ps_buffered; /* total number of all buffered unicast and
 707                                 * multicast packets for power saving stations
 708                                 */
 709         int wifi_wme_noack_test;
 710         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 711
 712         bool powersave;
 713         struct work_struct dynamic_ps_enable_work;
 714         struct work_struct dynamic_ps_disable_work;
 715         struct timer_list dynamic_ps_timer;
 716
 717         int user_power_level; /* in dBm */
 718         int power_constr_level; /* in dBm */
 719
 720 #ifdef CONFIG_MAC80211_DEBUGFS
 721         struct local_debugfsdentries {
 722                 struct dentry *rcdir;
 723                 struct dentry *rcname;
 724                 struct dentry *frequency;
 725                 struct dentry *rts_threshold;
 726                 struct dentry *fragmentation_threshold;
 727                 struct dentry *short_retry_limit;
 728                 struct dentry *long_retry_limit;
 729                 struct dentry *total_ps_buffered;
 730                 struct dentry *wep_iv;
 731                 struct dentry *statistics;
 732                 struct local_debugfsdentries_statsdentries {
 733                         struct dentry *transmitted_fragment_count;
 734                         struct dentry *multicast_transmitted_frame_count;
 735                         struct dentry *failed_count;
 736                         struct dentry *retry_count;
 737                         struct dentry *multiple_retry_count;
 738                         struct dentry *frame_duplicate_count;
 739                         struct dentry *received_fragment_count;
 740                         struct dentry *multicast_received_frame_count;
 741                         struct dentry *transmitted_frame_count;
 742                         struct dentry *wep_undecryptable_count;
 743                         struct dentry *num_scans;
 744 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 745                         struct dentry *tx_handlers_drop;
 746                         struct dentry *tx_handlers_queued;
 747                         struct dentry *tx_handlers_drop_unencrypted;
 748                         struct dentry *tx_handlers_drop_fragment;
 749                         struct dentry *tx_handlers_drop_wep;
 750                         struct dentry *tx_handlers_drop_not_assoc;
 751                         struct dentry *tx_handlers_drop_unauth_port;
 752                         struct dentry *rx_handlers_drop;
 753                         struct dentry *rx_handlers_queued;
 754                         struct dentry *rx_handlers_drop_nullfunc;
 755                         struct dentry *rx_handlers_drop_defrag;
 756                         struct dentry *rx_handlers_drop_short;
 757                         struct dentry *rx_handlers_drop_passive_scan;
 758                         struct dentry *tx_expand_skb_head;
 759                         struct dentry *tx_expand_skb_head_cloned;
 760                         struct dentry *rx_expand_skb_head;
 761                         struct dentry *rx_expand_skb_head2;
 762                         struct dentry *rx_handlers_fragments;
 763                         struct dentry *tx_status_drop;
 764 #endif
 765                         struct dentry *dot11ACKFailureCount;
 766                         struct dentry *dot11RTSFailureCount;
 767                         struct dentry *dot11FCSErrorCount;
 768                         struct dentry *dot11RTSSuccessCount;
 769                 } stats;
 770                 struct dentry *stations;
 771                 struct dentry *keys;
 772         } debugfs;
 773 #endif
 774 };
 775
 776 static inline struct ieee80211_sub_if_data *
 777 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 778 {
 779         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 780
 781         BUG_ON(!local || local->mdev == dev);
 782
 783         return netdev_priv(dev);
 784 }
 785
 786 /* this struct represents 802.11n's RA/TID combination */
 787 struct ieee80211_ra_tid {
 788         u8 ra[ETH_ALEN];
 789         u16 tid;
 790 };
 791
 792 /* Parsed Information Elements */
 793 struct ieee802_11_elems {
 794         u8 *ie_start;
 795         size_t total_len;
 796
 797         /* pointers to IEs */
 798         u8 *ssid;
 799         u8 *supp_rates;
 800         u8 *fh_params;
 801         u8 *ds_params;
 802         u8 *cf_params;
 803         u8 *tim;
 804         u8 *ibss_params;
 805         u8 *challenge;
 806         u8 *wpa;
 807         u8 *rsn;
 808         u8 *erp_info;
 809         u8 *ext_supp_rates;
 810         u8 *wmm_info;
 811         u8 *wmm_param;
 812         struct ieee80211_ht_cap *ht_cap_elem;
 813         struct ieee80211_ht_info *ht_info_elem;
 814         u8 *mesh_config;
 815         u8 *mesh_id;
 816         u8 *peer_link;
 817         u8 *preq;
 818         u8 *prep;
 819         u8 *perr;
 820         u8 *ch_switch_elem;
 821         u8 *country_elem;
 822         u8 *pwr_constr_elem;
 823         u8 *quiet_elem;         /* first quite element */
 824         u8 *assoc_comeback;
 825
 826         /* length of them, respectively */
 827         u8 ssid_len;
 828         u8 supp_rates_len;
 829         u8 fh_params_len;
 830         u8 ds_params_len;
 831         u8 cf_params_len;
 832         u8 tim_len;
 833         u8 ibss_params_len;
 834         u8 challenge_len;
 835         u8 wpa_len;
 836         u8 rsn_len;
 837         u8 erp_info_len;
 838         u8 ext_supp_rates_len;
 839         u8 wmm_info_len;
 840         u8 wmm_param_len;
 841         u8 mesh_config_len;
 842         u8 mesh_id_len;
 843         u8 peer_link_len;
 844         u8 preq_len;
 845         u8 prep_len;
 846         u8 perr_len;
 847         u8 ch_switch_elem_len;
 848         u8 country_elem_len;
 849         u8 pwr_constr_elem_len;
 850         u8 quiet_elem_len;
 851         u8 num_of_quiet_elem;   /* can be more the one */
 852         u8 assoc_comeback_len;
 853 };
 854
 855 static inline struct ieee80211_local *hw_to_local(
 856         struct ieee80211_hw *hw)
 857 {
 858         return container_of(hw, struct ieee80211_local, hw);
 859 }
 860
 861 static inline struct ieee80211_hw *local_to_hw(
 862         struct ieee80211_local *local)
 863 {
 864         return &local->hw;
 865 }
 866
 867
 868 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 869 {
 870         return compare_ether_addr(raddr, addr) == 0 ||
 871                is_broadcast_ether_addr(raddr);
 872 }
 873
 874
 875 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 876 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 877 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 878 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 879                                       u32 changed);
 880 void ieee80211_configure_filter(struct ieee80211_local *local);
 881
 882 /* wireless extensions */
 883 extern const struct iw_handler_def ieee80211_iw_handler_def;
 884
 885 /* STA/IBSS code */
 886 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 887 void ieee80211_scan_work(struct work_struct *work);
 888 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 889                            struct ieee80211_rx_status *rx_status);
 890 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 891 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 892 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 893 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 894                             struct ieee80211_if_sta *ifsta);
 895 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 896                                         u8 *bssid, u8 *addr, u64 supp_rates);
 897 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 898 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 899 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 900 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 901                             struct ieee802_11_elems *elems,
 902                             enum ieee80211_band band);
 903 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 904                               u8 *ssid, size_t ssid_len);
 905
 906 /* scan/BSS handling */
 907 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 908                            u8 *ssid, size_t ssid_len);
 909 int ieee80211_scan_results(struct ieee80211_local *local,
 910                            struct iw_request_info *info,
 911                            char *buf, size_t len);
 912 ieee80211_rx_result
 913 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
 914                   struct sk_buff *skb,
 915                   struct ieee80211_rx_status *rx_status);
 916 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 917 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 918 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 919                                char *ie, size_t len);
 920
 921 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 922 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 923                          u8 *ssid, size_t ssid_len);
 924 struct ieee80211_bss *
 925 ieee80211_bss_info_update(struct ieee80211_local *local,
 926                           struct ieee80211_rx_status *rx_status,
 927                           struct ieee80211_mgmt *mgmt,
 928                           size_t len,
 929                           struct ieee802_11_elems *elems,
 930                           int freq, bool beacon);
 931 struct ieee80211_bss *
 932 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
 933                      u8 *ssid, u8 ssid_len);
 934 struct ieee80211_bss *
 935 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 936                      u8 *ssid, u8 ssid_len);
 937 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 938                           struct ieee80211_bss *bss);
 939
 940 /* interface handling */
 941 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 942                      struct net_device **new_dev, enum nl80211_iftype type,
 943                      struct vif_params *params);
 944 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 945                              enum nl80211_iftype type);
 946 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 947 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 948
 949 /* tx handling */
 950 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 951 void ieee80211_tx_pending(unsigned long data);
 952 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 953 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 954 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 955
 956 /* HT */
 957 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 958                                        struct ieee80211_ht_cap *ht_cap_ie,
 959                                        struct ieee80211_sta_ht_cap *ht_cap);
 960 u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
 961                         struct ieee80211_ht_info *hti,
 962                         u16 ap_ht_cap_flags);
 963 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 964
 965 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 966                                 u16 tid, u16 initiator, u16 reason);
 967 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 968 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 969                              struct sta_info *sta,
 970                              struct ieee80211_mgmt *mgmt, size_t len);
 971 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 972                                   struct sta_info *sta,
 973                                   struct ieee80211_mgmt *mgmt,
 974                                   size_t len);
 975 void ieee80211_process_addba_request(struct ieee80211_local *local,
 976                                      struct sta_info *sta,
 977                                      struct ieee80211_mgmt *mgmt,
 978                                      size_t len);
 979
 980 /* Spectrum management */
 981 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
 982                                        struct ieee80211_mgmt *mgmt,
 983                                        size_t len);
 984 void ieee80211_chswitch_timer(unsigned long data);
 985 void ieee80211_chswitch_work(struct work_struct *work);
 986 void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
 987                                   struct ieee80211_channel_sw_ie *sw_elem,
 988                                   struct ieee80211_bss *bss);
 989 void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
 990                                  u16 capab_info, u8 *pwr_constr_elem,
 991                                  u8 pwr_constr_elem_len);
 992
 993 /* utility functions/constants */
 994 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 995 extern const unsigned char rfc1042_header[6];
 996 extern const unsigned char bridge_tunnel_header[6];
 997 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 998                         enum nl80211_iftype type);
 999 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1000                              int rate, int erp, int short_preamble);
1001 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1002                                      struct ieee80211_hdr *hdr);
1003 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1004 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1005                       int encrypt);
1006 void ieee802_11_parse_elems(u8 *start, size_t len,
1007                             struct ieee802_11_elems *elems);
1008 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1009 u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
1010                               enum ieee80211_band band);
1011
1012 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1013 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1014 void ieee80211_dynamic_ps_timer(unsigned long data);
1015 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1016                              struct ieee80211_sub_if_data *sdata,
1017                              int powersave);
1018
1019 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1020                                      enum queue_stop_reason reason);
1021 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1022                                      enum queue_stop_reason reason);
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 */