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 #define IEEE80211_TX_PROBE_LAST_FRAG    BIT(3)
 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         s8 rate_idx;
 157         /* use this rate (if set) for last fragment; rate can
 158          * be set to lower rate for the first fragments, e.g.,
 159          * when using CTS protection with IEEE 802.11g. */
 160         s8 last_frag_rate_idx;
 161
 162         /* Extra fragments (in addition to the first fragment
 163          * in skb) */
 164         struct sk_buff **extra_frag;
 165         int num_extra_frag;
 166
 167         u16 ethertype;
 168         unsigned int flags;
 169 };
 170
 171
 172 typedef unsigned __bitwise__ ieee80211_rx_result;
 173 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 174 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 175 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 176 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 177
 178 #define IEEE80211_RX_IN_SCAN            BIT(0)
 179 /* frame is destined to interface currently processed (incl. multicast frames) */
 180 #define IEEE80211_RX_RA_MATCH           BIT(1)
 181 #define IEEE80211_RX_AMSDU              BIT(2)
 182 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 183 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 184
 185 struct ieee80211_rx_data {
 186         struct sk_buff *skb;
 187         struct net_device *dev;
 188         struct ieee80211_local *local;
 189         struct ieee80211_sub_if_data *sdata;
 190         struct sta_info *sta;
 191         struct ieee80211_key *key;
 192         struct ieee80211_rx_status *status;
 193         struct ieee80211_rate *rate;
 194
 195         u16 ethertype;
 196         unsigned int flags;
 197         int sent_ps_buffered;
 198         int queue;
 199         u32 tkip_iv32;
 200         u16 tkip_iv16;
 201 };
 202
 203 struct ieee80211_tx_stored_packet {
 204         struct sk_buff *skb;
 205         struct sk_buff **extra_frag;
 206         s8 last_frag_rate_idx;
 207         int num_extra_frag;
 208         bool last_frag_rate_ctrl_probe;
 209 };
 210
 211 struct beacon_data {
 212         u8 *head, *tail;
 213         int head_len, tail_len;
 214         int dtim_period;
 215 };
 216
 217 struct ieee80211_if_ap {
 218         struct beacon_data *beacon;
 219
 220         struct list_head vlans;
 221
 222         u8 ssid[IEEE80211_MAX_SSID_LEN];
 223         size_t ssid_len;
 224
 225         /* yes, this looks ugly, but guarantees that we can later use
 226          * bitmap_empty :)
 227          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 228         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 229         struct sk_buff_head ps_bc_buf;
 230         atomic_t num_sta_ps; /* number of stations in PS mode */
 231         int dtim_count;
 232 };
 233
 234 struct ieee80211_if_wds {
 235         struct sta_info *sta;
 236         u8 remote_addr[ETH_ALEN];
 237 };
 238
 239 struct ieee80211_if_vlan {
 240         struct list_head list;
 241 };
 242
 243 struct mesh_stats {
 244         __u32 fwded_frames;             /* Mesh forwarded frames */
 245         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 246         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 247         atomic_t estab_plinks;
 248 };
 249
 250 #define PREQ_Q_F_START          0x1
 251 #define PREQ_Q_F_REFRESH        0x2
 252 struct mesh_preq_queue {
 253         struct list_head list;
 254         u8 dst[ETH_ALEN];
 255         u8 flags;
 256 };
 257
 258 struct mesh_config {
 259         /* Timeouts in ms */
 260         /* Mesh plink management parameters */
 261         u16 dot11MeshRetryTimeout;
 262         u16 dot11MeshConfirmTimeout;
 263         u16 dot11MeshHoldingTimeout;
 264         u16 dot11MeshMaxPeerLinks;
 265         u8  dot11MeshMaxRetries;
 266         u8  dot11MeshTTL;
 267         bool auto_open_plinks;
 268         /* HWMP parameters */
 269         u8  dot11MeshHWMPmaxPREQretries;
 270         u32 path_refresh_time;
 271         u16 min_discovery_timeout;
 272         u32 dot11MeshHWMPactivePathTimeout;
 273         u16 dot11MeshHWMPpreqMinInterval;
 274         u16 dot11MeshHWMPnetDiameterTraversalTime;
 275 };
 276
 277
 278 /* flags used in struct ieee80211_if_sta.flags */
 279 #define IEEE80211_STA_SSID_SET          BIT(0)
 280 #define IEEE80211_STA_BSSID_SET         BIT(1)
 281 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 282 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 283 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 284 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 285 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 286 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 287 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 288 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 289 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 290 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 291 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 292 /* flags for MLME request */
 293 #define IEEE80211_STA_REQ_SCAN 0
 294 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 295 #define IEEE80211_STA_REQ_AUTH 2
 296 #define IEEE80211_STA_REQ_RUN  3
 297
 298 /* STA/IBSS MLME states */
 299 enum ieee80211_sta_mlme_state {
 300         IEEE80211_STA_MLME_DISABLED,
 301         IEEE80211_STA_MLME_DIRECT_PROBE,
 302         IEEE80211_STA_MLME_AUTHENTICATE,
 303         IEEE80211_STA_MLME_ASSOCIATE,
 304         IEEE80211_STA_MLME_ASSOCIATED,
 305         IEEE80211_STA_MLME_IBSS_SEARCH,
 306         IEEE80211_STA_MLME_IBSS_JOINED,
 307 };
 308
 309 /* bitfield of allowed auth algs */
 310 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 311 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 312 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 313
 314 struct ieee80211_if_sta {
 315         struct timer_list timer;
 316         struct work_struct work;
 317         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 318         u8 ssid[IEEE80211_MAX_SSID_LEN];
 319         enum ieee80211_sta_mlme_state state;
 320         size_t ssid_len;
 321         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 322         size_t scan_ssid_len;
 323         u16 aid;
 324         u16 ap_capab, capab;
 325         u8 *extra_ie; /* to be added to the end of AssocReq */
 326         size_t extra_ie_len;
 327
 328         /* The last AssocReq/Resp IEs */
 329         u8 *assocreq_ies, *assocresp_ies;
 330         size_t assocreq_ies_len, assocresp_ies_len;
 331
 332         struct sk_buff_head skb_queue;
 333
 334         int assoc_scan_tries; /* number of scans done pre-association */
 335         int direct_probe_tries; /* retries for direct probes */
 336         int auth_tries; /* retries for auth req */
 337         int assoc_tries; /* retries for assoc req */
 338
 339         unsigned long request;
 340
 341         unsigned long last_probe;
 342
 343         unsigned int flags;
 344
 345         unsigned int auth_algs; /* bitfield of allowed auth algs */
 346         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 347         int auth_transaction;
 348
 349         unsigned long ibss_join_req;
 350         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 351         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 352
 353         int wmm_last_param_set;
 354 };
 355
 356 struct ieee80211_if_mesh {
 357         struct work_struct work;
 358         struct timer_list housekeeping_timer;
 359         struct timer_list mesh_path_timer;
 360         struct sk_buff_head skb_queue;
 361
 362         bool housekeeping;
 363
 364         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 365         size_t mesh_id_len;
 366         /* Active Path Selection Protocol Identifier */
 367         u8 mesh_pp_id[4];
 368         /* Active Path Selection Metric Identifier */
 369         u8 mesh_pm_id[4];
 370         /* Congestion Control Mode Identifier */
 371         u8 mesh_cc_id[4];
 372         /* Local mesh Destination Sequence Number */
 373         u32 dsn;
 374         /* Last used PREQ ID */
 375         u32 preq_id;
 376         atomic_t mpaths;
 377         /* Timestamp of last DSN update */
 378         unsigned long last_dsn_update;
 379         /* Timestamp of last DSN sent */
 380         unsigned long last_preq;
 381         struct mesh_rmc *rmc;
 382         spinlock_t mesh_preq_queue_lock;
 383         struct mesh_preq_queue preq_queue;
 384         int preq_queue_len;
 385         struct mesh_stats mshstats;
 386         struct mesh_config mshcfg;
 387         u32 mesh_seqnum;
 388         bool accepting_plinks;
 389 };
 390
 391 #ifdef CONFIG_MAC80211_MESH
 392 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 393         do { (msh)->mshstats.name++; } while (0)
 394 #else
 395 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 396         do { } while (0)
 397 #endif
 398
 399 /**
 400  * enum ieee80211_sub_if_data_flags - virtual interface flags
 401  *
 402  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 403  * @IEEE80211_SDATA_PROMISC: interface is promisc
 404  * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
 405  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 406  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 407  *      associated stations and deliver multicast frames both
 408  *      back to wireless media and to the local net stack.
 409  */
 410 enum ieee80211_sub_if_data_flags {
 411         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 412         IEEE80211_SDATA_PROMISC                 = BIT(1),
 413         IEEE80211_SDATA_USERSPACE_MLME          = BIT(2),
 414         IEEE80211_SDATA_OPERATING_GMODE         = BIT(3),
 415         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(4),
 416 };
 417
 418 struct ieee80211_sub_if_data {
 419         struct list_head list;
 420
 421         struct wireless_dev wdev;
 422
 423         /* keys */
 424         struct list_head key_list;
 425
 426         struct net_device *dev;
 427         struct ieee80211_local *local;
 428
 429         unsigned int flags;
 430
 431         int drop_unencrypted;
 432
 433         /* Fragment table for host-based reassembly */
 434         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 435         unsigned int fragment_next;
 436
 437 #define NUM_DEFAULT_KEYS 4
 438         struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
 439         struct ieee80211_key *default_key;
 440
 441         /* BSS configuration for this interface. */
 442         struct ieee80211_bss_conf bss_conf;
 443
 444         /*
 445          * AP this belongs to: self in AP mode and
 446          * corresponding AP in VLAN mode, NULL for
 447          * all others (might be needed later in IBSS)
 448          */
 449         struct ieee80211_if_ap *bss;
 450
 451         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 452         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 453
 454         union {
 455                 struct ieee80211_if_ap ap;
 456                 struct ieee80211_if_wds wds;
 457                 struct ieee80211_if_vlan vlan;
 458                 struct ieee80211_if_sta sta;
 459 #ifdef CONFIG_MAC80211_MESH
 460                 struct ieee80211_if_mesh mesh;
 461 #endif
 462                 u32 mntr_flags;
 463         } u;
 464
 465 #ifdef CONFIG_MAC80211_DEBUGFS
 466         struct dentry *debugfsdir;
 467         union {
 468                 struct {
 469                         struct dentry *drop_unencrypted;
 470                         struct dentry *state;
 471                         struct dentry *bssid;
 472                         struct dentry *prev_bssid;
 473                         struct dentry *ssid_len;
 474                         struct dentry *aid;
 475                         struct dentry *ap_capab;
 476                         struct dentry *capab;
 477                         struct dentry *extra_ie_len;
 478                         struct dentry *auth_tries;
 479                         struct dentry *assoc_tries;
 480                         struct dentry *auth_algs;
 481                         struct dentry *auth_alg;
 482                         struct dentry *auth_transaction;
 483                         struct dentry *flags;
 484                         struct dentry *force_unicast_rateidx;
 485                         struct dentry *max_ratectrl_rateidx;
 486                 } sta;
 487                 struct {
 488                         struct dentry *drop_unencrypted;
 489                         struct dentry *num_sta_ps;
 490                         struct dentry *dtim_count;
 491                         struct dentry *force_unicast_rateidx;
 492                         struct dentry *max_ratectrl_rateidx;
 493                         struct dentry *num_buffered_multicast;
 494                 } ap;
 495                 struct {
 496                         struct dentry *drop_unencrypted;
 497                         struct dentry *peer;
 498                         struct dentry *force_unicast_rateidx;
 499                         struct dentry *max_ratectrl_rateidx;
 500                 } wds;
 501                 struct {
 502                         struct dentry *drop_unencrypted;
 503                         struct dentry *force_unicast_rateidx;
 504                         struct dentry *max_ratectrl_rateidx;
 505                 } vlan;
 506                 struct {
 507                         struct dentry *mode;
 508                 } monitor;
 509         } debugfs;
 510         struct {
 511                 struct dentry *default_key;
 512         } common_debugfs;
 513
 514 #ifdef CONFIG_MAC80211_MESH
 515         struct dentry *mesh_stats_dir;
 516         struct {
 517                 struct dentry *fwded_frames;
 518                 struct dentry *dropped_frames_ttl;
 519                 struct dentry *dropped_frames_no_route;
 520                 struct dentry *estab_plinks;
 521                 struct timer_list mesh_path_timer;
 522         } mesh_stats;
 523
 524         struct dentry *mesh_config_dir;
 525         struct {
 526                 struct dentry *dot11MeshRetryTimeout;
 527                 struct dentry *dot11MeshConfirmTimeout;
 528                 struct dentry *dot11MeshHoldingTimeout;
 529                 struct dentry *dot11MeshMaxRetries;
 530                 struct dentry *dot11MeshTTL;
 531                 struct dentry *auto_open_plinks;
 532                 struct dentry *dot11MeshMaxPeerLinks;
 533                 struct dentry *dot11MeshHWMPactivePathTimeout;
 534                 struct dentry *dot11MeshHWMPpreqMinInterval;
 535                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 536                 struct dentry *dot11MeshHWMPmaxPREQretries;
 537                 struct dentry *path_refresh_time;
 538                 struct dentry *min_discovery_timeout;
 539         } mesh_config;
 540 #endif
 541
 542 #endif
 543         /* must be last, dynamically sized area in this! */
 544         struct ieee80211_vif vif;
 545 };
 546
 547 static inline
 548 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 549 {
 550         return container_of(p, struct ieee80211_sub_if_data, vif);
 551 }
 552
 553 static inline void
 554 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 555                             u8 mesh_id_len, u8 *mesh_id)
 556 {
 557 #ifdef CONFIG_MAC80211_MESH
 558         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 559         ifmsh->mesh_id_len = mesh_id_len;
 560         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 561 #else
 562         WARN_ON(1);
 563 #endif
 564 }
 565
 566 enum {
 567         IEEE80211_RX_MSG        = 1,
 568         IEEE80211_TX_STATUS_MSG = 2,
 569         IEEE80211_DELBA_MSG     = 3,
 570         IEEE80211_ADDBA_MSG     = 4,
 571 };
 572
 573 /* maximum number of hardware queues we support. */
 574 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 575
 576 struct ieee80211_master_priv {
 577         struct ieee80211_local *local;
 578 };
 579
 580 struct ieee80211_local {
 581         /* embed the driver visible part.
 582          * don't cast (use the static inlines below), but we keep
 583          * it first anyway so they become a no-op */
 584         struct ieee80211_hw hw;
 585
 586         const struct ieee80211_ops *ops;
 587
 588         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 589
 590         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 591         int open_count;
 592         int monitors, cooked_mntrs;
 593         /* number of interfaces with corresponding FIF_ flags */
 594         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 595         unsigned int filter_flags; /* FIF_* */
 596         struct iw_statistics wstats;
 597         u8 wstats_flags;
 598         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 599         int tx_headroom; /* required headroom for hardware/radiotap */
 600
 601         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 602          * added to skb_queue will be processed, but frames in
 603          * skb_queue_unreliable may be dropped if the total length of these
 604          * queues increases over the limit. */
 605 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 606         struct tasklet_struct tasklet;
 607         struct sk_buff_head skb_queue;
 608         struct sk_buff_head skb_queue_unreliable;
 609
 610         /* Station data */
 611         /*
 612          * The lock only protects the list, hash, timer and counter
 613          * against manipulation, reads are done in RCU. Additionally,
 614          * the lock protects each BSS's TIM bitmap.
 615          */
 616         spinlock_t sta_lock;
 617         unsigned long num_sta;
 618         struct list_head sta_list;
 619         struct list_head sta_flush_list;
 620         struct work_struct sta_flush_work;
 621         struct sta_info *sta_hash[STA_HASH_SIZE];
 622         struct timer_list sta_cleanup;
 623
 624         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 625         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 626         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 627         struct tasklet_struct tx_pending_tasklet;
 628
 629         /* number of interfaces with corresponding IFF_ flags */
 630         atomic_t iff_allmultis, iff_promiscs;
 631
 632         struct rate_control_ref *rate_ctrl;
 633
 634         int rts_threshold;
 635         int fragmentation_threshold;
 636         int short_retry_limit; /* dot11ShortRetryLimit */
 637         int long_retry_limit; /* dot11LongRetryLimit */
 638
 639         struct crypto_blkcipher *wep_tx_tfm;
 640         struct crypto_blkcipher *wep_rx_tfm;
 641         u32 wep_iv;
 642
 643         struct list_head interfaces;
 644
 645         /*
 646          * Key lock, protects sdata's key_list and sta_info's
 647          * key pointers (write access, they're RCU.)
 648          */
 649         spinlock_t key_lock;
 650
 651
 652         /* Scanning and BSS list */
 653         bool sw_scanning, hw_scanning;
 654         int scan_channel_idx;
 655         enum ieee80211_band scan_band;
 656
 657         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 658         unsigned long last_scan_completed;
 659         struct delayed_work scan_work;
 660         struct ieee80211_sub_if_data *scan_sdata;
 661         struct ieee80211_channel *oper_channel, *scan_channel;
 662         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 663         size_t scan_ssid_len;
 664         struct list_head bss_list;
 665         struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
 666         spinlock_t bss_lock;
 667
 668         /* SNMP counters */
 669         /* dot11CountersTable */
 670         u32 dot11TransmittedFragmentCount;
 671         u32 dot11MulticastTransmittedFrameCount;
 672         u32 dot11FailedCount;
 673         u32 dot11RetryCount;
 674         u32 dot11MultipleRetryCount;
 675         u32 dot11FrameDuplicateCount;
 676         u32 dot11ReceivedFragmentCount;
 677         u32 dot11MulticastReceivedFrameCount;
 678         u32 dot11TransmittedFrameCount;
 679         u32 dot11WEPUndecryptableCount;
 680
 681 #ifdef CONFIG_MAC80211_LEDS
 682         int tx_led_counter, rx_led_counter;
 683         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 684         char tx_led_name[32], rx_led_name[32],
 685              assoc_led_name[32], radio_led_name[32];
 686 #endif
 687
 688 #ifdef CONFIG_MAC80211_DEBUGFS
 689         struct work_struct sta_debugfs_add;
 690 #endif
 691
 692 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 693         /* TX/RX handler statistics */
 694         unsigned int tx_handlers_drop;
 695         unsigned int tx_handlers_queued;
 696         unsigned int tx_handlers_drop_unencrypted;
 697         unsigned int tx_handlers_drop_fragment;
 698         unsigned int tx_handlers_drop_wep;
 699         unsigned int tx_handlers_drop_not_assoc;
 700         unsigned int tx_handlers_drop_unauth_port;
 701         unsigned int rx_handlers_drop;
 702         unsigned int rx_handlers_queued;
 703         unsigned int rx_handlers_drop_nullfunc;
 704         unsigned int rx_handlers_drop_defrag;
 705         unsigned int rx_handlers_drop_short;
 706         unsigned int rx_handlers_drop_passive_scan;
 707         unsigned int tx_expand_skb_head;
 708         unsigned int tx_expand_skb_head_cloned;
 709         unsigned int rx_expand_skb_head;
 710         unsigned int rx_expand_skb_head2;
 711         unsigned int rx_handlers_fragments;
 712         unsigned int tx_status_drop;
 713 #define I802_DEBUG_INC(c) (c)++
 714 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 715 #define I802_DEBUG_INC(c) do { } while (0)
 716 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 717
 718
 719         int total_ps_buffered; /* total number of all buffered unicast and
 720                                 * multicast packets for power saving stations
 721                                 */
 722         int wifi_wme_noack_test;
 723         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 724
 725 #ifdef CONFIG_MAC80211_DEBUGFS
 726         struct local_debugfsdentries {
 727                 struct dentry *rcdir;
 728                 struct dentry *rcname;
 729                 struct dentry *frequency;
 730                 struct dentry *antenna_sel_tx;
 731                 struct dentry *antenna_sel_rx;
 732                 struct dentry *rts_threshold;
 733                 struct dentry *fragmentation_threshold;
 734                 struct dentry *short_retry_limit;
 735                 struct dentry *long_retry_limit;
 736                 struct dentry *total_ps_buffered;
 737                 struct dentry *wep_iv;
 738                 struct dentry *statistics;
 739                 struct local_debugfsdentries_statsdentries {
 740                         struct dentry *transmitted_fragment_count;
 741                         struct dentry *multicast_transmitted_frame_count;
 742                         struct dentry *failed_count;
 743                         struct dentry *retry_count;
 744                         struct dentry *multiple_retry_count;
 745                         struct dentry *frame_duplicate_count;
 746                         struct dentry *received_fragment_count;
 747                         struct dentry *multicast_received_frame_count;
 748                         struct dentry *transmitted_frame_count;
 749                         struct dentry *wep_undecryptable_count;
 750                         struct dentry *num_scans;
 751 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 752                         struct dentry *tx_handlers_drop;
 753                         struct dentry *tx_handlers_queued;
 754                         struct dentry *tx_handlers_drop_unencrypted;
 755                         struct dentry *tx_handlers_drop_fragment;
 756                         struct dentry *tx_handlers_drop_wep;
 757                         struct dentry *tx_handlers_drop_not_assoc;
 758                         struct dentry *tx_handlers_drop_unauth_port;
 759                         struct dentry *rx_handlers_drop;
 760                         struct dentry *rx_handlers_queued;
 761                         struct dentry *rx_handlers_drop_nullfunc;
 762                         struct dentry *rx_handlers_drop_defrag;
 763                         struct dentry *rx_handlers_drop_short;
 764                         struct dentry *rx_handlers_drop_passive_scan;
 765                         struct dentry *tx_expand_skb_head;
 766                         struct dentry *tx_expand_skb_head_cloned;
 767                         struct dentry *rx_expand_skb_head;
 768                         struct dentry *rx_expand_skb_head2;
 769                         struct dentry *rx_handlers_fragments;
 770                         struct dentry *tx_status_drop;
 771 #endif
 772                         struct dentry *dot11ACKFailureCount;
 773                         struct dentry *dot11RTSFailureCount;
 774                         struct dentry *dot11FCSErrorCount;
 775                         struct dentry *dot11RTSSuccessCount;
 776                 } stats;
 777                 struct dentry *stations;
 778                 struct dentry *keys;
 779         } debugfs;
 780 #endif
 781 };
 782
 783 static inline struct ieee80211_sub_if_data *
 784 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 785 {
 786         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 787
 788         BUG_ON(!local || local->mdev == dev);
 789
 790         return netdev_priv(dev);
 791 }
 792
 793 /* this struct represents 802.11n's RA/TID combination */
 794 struct ieee80211_ra_tid {
 795         u8 ra[ETH_ALEN];
 796         u16 tid;
 797 };
 798
 799 /* Parsed Information Elements */
 800 struct ieee802_11_elems {
 801         u8 *ie_start;
 802         size_t total_len;
 803
 804         /* pointers to IEs */
 805         u8 *ssid;
 806         u8 *supp_rates;
 807         u8 *fh_params;
 808         u8 *ds_params;
 809         u8 *cf_params;
 810         u8 *tim;
 811         u8 *ibss_params;
 812         u8 *challenge;
 813         u8 *wpa;
 814         u8 *rsn;
 815         u8 *erp_info;
 816         u8 *ext_supp_rates;
 817         u8 *wmm_info;
 818         u8 *wmm_param;
 819         struct ieee80211_ht_cap *ht_cap_elem;
 820         struct ieee80211_ht_addt_info *ht_info_elem;
 821         u8 *mesh_config;
 822         u8 *mesh_id;
 823         u8 *peer_link;
 824         u8 *preq;
 825         u8 *prep;
 826         u8 *perr;
 827         u8 *ch_switch_elem;
 828         u8 *country_elem;
 829         u8 *pwr_constr_elem;
 830         u8 *quiet_elem;         /* first quite element */
 831
 832         /* length of them, respectively */
 833         u8 ssid_len;
 834         u8 supp_rates_len;
 835         u8 fh_params_len;
 836         u8 ds_params_len;
 837         u8 cf_params_len;
 838         u8 tim_len;
 839         u8 ibss_params_len;
 840         u8 challenge_len;
 841         u8 wpa_len;
 842         u8 rsn_len;
 843         u8 erp_info_len;
 844         u8 ext_supp_rates_len;
 845         u8 wmm_info_len;
 846         u8 wmm_param_len;
 847         u8 mesh_config_len;
 848         u8 mesh_id_len;
 849         u8 peer_link_len;
 850         u8 preq_len;
 851         u8 prep_len;
 852         u8 perr_len;
 853         u8 ch_switch_elem_len;
 854         u8 country_elem_len;
 855         u8 pwr_constr_elem_len;
 856         u8 quiet_elem_len;
 857         u8 num_of_quiet_elem;   /* can be more the one */
 858 };
 859
 860 static inline struct ieee80211_local *hw_to_local(
 861         struct ieee80211_hw *hw)
 862 {
 863         return container_of(hw, struct ieee80211_local, hw);
 864 }
 865
 866 static inline struct ieee80211_hw *local_to_hw(
 867         struct ieee80211_local *local)
 868 {
 869         return &local->hw;
 870 }
 871
 872 struct sta_attribute {
 873         struct attribute attr;
 874         ssize_t (*show)(const struct sta_info *, char *buf);
 875         ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
 876 };
 877
 878 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 879 {
 880         return compare_ether_addr(raddr, addr) == 0 ||
 881                is_broadcast_ether_addr(raddr);
 882 }
 883
 884
 885 int ieee80211_hw_config(struct ieee80211_local *local);
 886 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 887 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 888 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
 889                         struct ieee80211_ht_info *req_ht_cap,
 890                         struct ieee80211_ht_bss_info *req_bss_cap);
 891 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 892                                       u32 changed);
 893 void ieee80211_configure_filter(struct ieee80211_local *local);
 894
 895 /* wireless extensions */
 896 extern const struct iw_handler_def ieee80211_iw_handler_def;
 897
 898 /* STA/IBSS code */
 899 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 900 void ieee80211_scan_work(struct work_struct *work);
 901 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 902                            struct ieee80211_rx_status *rx_status);
 903 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 904 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 905 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 906 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 907                             struct ieee80211_if_sta *ifsta);
 908 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 909                                         struct sk_buff *skb, u8 *bssid,
 910                                         u8 *addr, u64 supp_rates);
 911 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 912 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 913 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 914 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
 915                             struct ieee802_11_elems *elems,
 916                             enum ieee80211_band band);
 917 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 918                               u8 *ssid, size_t ssid_len);
 919
 920 /* scan/BSS handling */
 921 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 922                            u8 *ssid, size_t ssid_len);
 923 int ieee80211_scan_results(struct ieee80211_local *local,
 924                            struct iw_request_info *info,
 925                            char *buf, size_t len);
 926 ieee80211_rx_result
 927 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
 928                   struct sk_buff *skb,
 929                   struct ieee80211_rx_status *rx_status);
 930 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 931 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 932 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 933                                char *ie, size_t len);
 934
 935 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 936 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 937                          u8 *ssid, size_t ssid_len);
 938 struct ieee80211_bss *
 939 ieee80211_bss_info_update(struct ieee80211_local *local,
 940                           struct ieee80211_rx_status *rx_status,
 941                           struct ieee80211_mgmt *mgmt,
 942                           size_t len,
 943                           struct ieee802_11_elems *elems,
 944                           int freq, bool beacon);
 945 struct ieee80211_bss *
 946 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
 947                      u8 *ssid, u8 ssid_len);
 948 struct ieee80211_bss *
 949 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 950                      u8 *ssid, u8 ssid_len);
 951 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 952                           struct ieee80211_bss *bss);
 953
 954 /* interface handling */
 955 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 956                      struct net_device **new_dev, enum nl80211_iftype type,
 957                      struct vif_params *params);
 958 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 959                              enum nl80211_iftype type);
 960 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 961 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 962
 963 /* tx handling */
 964 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 965 void ieee80211_tx_pending(unsigned long data);
 966 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 967 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 968 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 969
 970 /* HT */
 971 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
 972                                    struct ieee80211_ht_info *ht_info);
 973 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
 974                         struct ieee80211_ht_addt_info *ht_add_info_ie,
 975                         struct ieee80211_ht_bss_info *bss_info);
 976 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 977
 978 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 979                                 u16 tid, u16 initiator, u16 reason);
 980 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
 981 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 982                              struct sta_info *sta,
 983                              struct ieee80211_mgmt *mgmt, size_t len);
 984 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 985                                   struct sta_info *sta,
 986                                   struct ieee80211_mgmt *mgmt,
 987                                   size_t len);
 988 void ieee80211_process_addba_request(struct ieee80211_local *local,
 989                                      struct sta_info *sta,
 990                                      struct ieee80211_mgmt *mgmt,
 991                                      size_t len);
 992
 993 /* Spectrum management */
 994 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
 995                                        struct ieee80211_mgmt *mgmt,
 996                                        size_t len);
 997
 998 /* utility functions/constants */
 999 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1000 extern const unsigned char rfc1042_header[6];
1001 extern const unsigned char bridge_tunnel_header[6];
1002 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1003                         enum nl80211_iftype type);
1004 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1005                              int rate, int erp, int short_preamble);
1006 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1007                                      struct ieee80211_hdr *hdr);
1008 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1009 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1010                       int encrypt);
1011 void ieee802_11_parse_elems(u8 *start, size_t len,
1012                             struct ieee802_11_elems *elems);
1013 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1014 u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
1015                               enum ieee80211_band band);
1016
1017 #ifdef CONFIG_MAC80211_NOINLINE
1018 #define debug_noinline noinline
1019 #else
1020 #define debug_noinline
1021 #endif
1022
1023 #endif /* IEEE80211_I_H */