net/mac80211/ieee80211_i.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007-2008  Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef IEEE80211_I_H
  13 #define IEEE80211_I_H
  14
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/etherdevice.h>
  26 #include <net/cfg80211.h>
  27 #include <net/wireless.h>
  28 #include <net/iw_handler.h>
  29 #include <net/mac80211.h>
  30 #include "key.h"
  31 #include "sta_info.h"
  32
  33 struct ieee80211_local;
  34
  35 /* Maximum number of broadcast/multicast frames to buffer when some of the
  36  * associated stations are using power saving. */
  37 #define AP_MAX_BC_BUFFER 128
  38
  39 /* Maximum number of frames buffered to all STAs, including multicast frames.
  40  * Note: increasing this limit increases the potential memory requirement. Each
  41  * frame can be up to about 2 kB long. */
  42 #define TOTAL_MAX_TX_BUFFER 512
  43
  44 /* Required encryption head and tailroom */
  45 #define IEEE80211_ENCRYPT_HEADROOM 8
  46 #define IEEE80211_ENCRYPT_TAILROOM 18
  47
  48 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  49  * reception of at least three fragmented frames. This limit can be increased
  50  * by changing this define, at the cost of slower frame reassembly and
  51  * increased memory use (about 2 kB of RAM per entry). */
  52 #define IEEE80211_FRAGMENT_MAX 4
  53
  54 /*
  55  * Time after which we ignore scan results and no longer report/use
  56  * them in any way.
  57  */
  58 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  59
  60 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  61
  62 struct ieee80211_fragment_entry {
  63         unsigned long first_frag_time;
  64         unsigned int seq;
  65         unsigned int rx_queue;
  66         unsigned int last_frag;
  67         unsigned int extra_len;
  68         struct sk_buff_head skb_list;
  69         int ccmp; /* Whether fragments were encrypted with CCMP */
  70         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  71 };
  72
  73
  74 struct ieee80211_bss {
  75         /* Yes, this is a hack */
  76         struct cfg80211_bss cbss;
  77
  78         /* don't want to look up all the time */
  79         size_t ssid_len;
  80         u8 ssid[IEEE80211_MAX_SSID_LEN];
  81
  82         u8 dtim_period;
  83
  84         bool wmm_used;
  85
  86         unsigned long last_probe_resp;
  87
  88 #ifdef CONFIG_MAC80211_MESH
  89         u8 *mesh_id;
  90         size_t mesh_id_len;
  91         u8 *mesh_cfg;
  92 #endif
  93
  94 #define IEEE80211_MAX_SUPP_RATES 32
  95         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  96         size_t supp_rates_len;
  97
  98         /*
  99          * During assocation, we save an ERP value from a probe response so
 100          * that we can feed ERP info to the driver when handling the
 101          * association completes. these fields probably won't be up-to-date
 102          * otherwise, you probably don't want to use them.
 103          */
 104         bool has_erp_value;
 105         u8 erp_value;
 106 };
 107
 108 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 109 {
 110 #ifdef CONFIG_MAC80211_MESH
 111         return bss->mesh_cfg;
 112 #endif
 113         return NULL;
 114 }
 115
 116 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 117 {
 118 #ifdef CONFIG_MAC80211_MESH
 119         return bss->mesh_id;
 120 #endif
 121         return NULL;
 122 }
 123
 124 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 125 {
 126 #ifdef CONFIG_MAC80211_MESH
 127         return bss->mesh_id_len;
 128 #endif
 129         return 0;
 130 }
 131
 132
 133 typedef unsigned __bitwise__ ieee80211_tx_result;
 134 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 135 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 136 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 137
 138 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 139 #define IEEE80211_TX_UNICAST            BIT(1)
 140 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 141
 142 struct ieee80211_tx_data {
 143         struct sk_buff *skb;
 144         struct net_device *dev;
 145         struct ieee80211_local *local;
 146         struct ieee80211_sub_if_data *sdata;
 147         struct sta_info *sta;
 148         struct ieee80211_key *key;
 149
 150         struct ieee80211_channel *channel;
 151
 152         /* Extra fragments (in addition to the first fragment
 153          * in skb) */
 154         struct sk_buff **extra_frag;
 155         int num_extra_frag;
 156
 157         u16 ethertype;
 158         unsigned int flags;
 159 };
 160
 161
 162 typedef unsigned __bitwise__ ieee80211_rx_result;
 163 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 164 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 165 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 166 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 167
 168 #define IEEE80211_RX_IN_SCAN            BIT(0)
 169 /* frame is destined to interface currently processed (incl. multicast frames) */
 170 #define IEEE80211_RX_RA_MATCH           BIT(1)
 171 #define IEEE80211_RX_AMSDU              BIT(2)
 172 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 173 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 174
 175 struct ieee80211_rx_data {
 176         struct sk_buff *skb;
 177         struct net_device *dev;
 178         struct ieee80211_local *local;
 179         struct ieee80211_sub_if_data *sdata;
 180         struct sta_info *sta;
 181         struct ieee80211_key *key;
 182         struct ieee80211_rx_status *status;
 183         struct ieee80211_rate *rate;
 184
 185         unsigned int flags;
 186         int sent_ps_buffered;
 187         int queue;
 188         u32 tkip_iv32;
 189         u16 tkip_iv16;
 190 };
 191
 192 struct ieee80211_tx_stored_packet {
 193         struct sk_buff *skb;
 194         struct sk_buff **extra_frag;
 195         int num_extra_frag;
 196 };
 197
 198 struct beacon_data {
 199         u8 *head, *tail;
 200         int head_len, tail_len;
 201         int dtim_period;
 202 };
 203
 204 struct ieee80211_if_ap {
 205         struct beacon_data *beacon;
 206
 207         struct list_head vlans;
 208
 209         /* yes, this looks ugly, but guarantees that we can later use
 210          * bitmap_empty :)
 211          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 212         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 213         struct sk_buff_head ps_bc_buf;
 214         atomic_t num_sta_ps; /* number of stations in PS mode */
 215         int dtim_count;
 216 };
 217
 218 struct ieee80211_if_wds {
 219         struct sta_info *sta;
 220         u8 remote_addr[ETH_ALEN];
 221 };
 222
 223 struct ieee80211_if_vlan {
 224         struct list_head list;
 225 };
 226
 227 struct mesh_stats {
 228         __u32 fwded_frames;             /* Mesh forwarded frames */
 229         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 230         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 231         atomic_t estab_plinks;
 232 };
 233
 234 #define PREQ_Q_F_START          0x1
 235 #define PREQ_Q_F_REFRESH        0x2
 236 struct mesh_preq_queue {
 237         struct list_head list;
 238         u8 dst[ETH_ALEN];
 239         u8 flags;
 240 };
 241
 242 /* flags used in struct ieee80211_if_sta.flags */
 243 #define IEEE80211_STA_SSID_SET          BIT(0)
 244 #define IEEE80211_STA_BSSID_SET         BIT(1)
 245 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 246 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 247 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 248 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 249 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 250 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 251 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 252 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 253 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 254 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 255 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 256 #define IEEE80211_STA_TKIP_WEP_USED     BIT(14)
 257 #define IEEE80211_STA_CSA_RECEIVED      BIT(15)
 258 #define IEEE80211_STA_MFP_ENABLED       BIT(16)
 259 /* flags for MLME request */
 260 #define IEEE80211_STA_REQ_SCAN 0
 261 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 262 #define IEEE80211_STA_REQ_AUTH 2
 263 #define IEEE80211_STA_REQ_RUN  3
 264
 265 /* STA/IBSS MLME states */
 266 enum ieee80211_sta_mlme_state {
 267         IEEE80211_STA_MLME_DISABLED,
 268         IEEE80211_STA_MLME_DIRECT_PROBE,
 269         IEEE80211_STA_MLME_AUTHENTICATE,
 270         IEEE80211_STA_MLME_ASSOCIATE,
 271         IEEE80211_STA_MLME_ASSOCIATED,
 272         IEEE80211_STA_MLME_IBSS_SEARCH,
 273         IEEE80211_STA_MLME_IBSS_JOINED,
 274 };
 275
 276 /* bitfield of allowed auth algs */
 277 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 278 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 279 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 280
 281 struct ieee80211_if_sta {
 282         struct timer_list timer;
 283         struct timer_list chswitch_timer;
 284         struct work_struct work;
 285         struct work_struct chswitch_work;
 286         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 287         u8 ssid[IEEE80211_MAX_SSID_LEN];
 288         enum ieee80211_sta_mlme_state state;
 289         size_t ssid_len;
 290         u16 aid;
 291         u16 ap_capab, capab;
 292         u8 *extra_ie; /* to be added to the end of AssocReq */
 293         size_t extra_ie_len;
 294
 295         /* The last AssocReq/Resp IEs */
 296         u8 *assocreq_ies, *assocresp_ies;
 297         size_t assocreq_ies_len, assocresp_ies_len;
 298
 299         struct sk_buff_head skb_queue;
 300
 301         int assoc_scan_tries; /* number of scans done pre-association */
 302         int direct_probe_tries; /* retries for direct probes */
 303         int auth_tries; /* retries for auth req */
 304         int assoc_tries; /* retries for assoc req */
 305
 306         unsigned long request;
 307
 308         unsigned long last_probe;
 309
 310         unsigned int flags;
 311
 312         unsigned int auth_algs; /* bitfield of allowed auth algs */
 313         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 314         int auth_transaction;
 315
 316         enum {
 317                 IEEE80211_MFP_DISABLED,
 318                 IEEE80211_MFP_OPTIONAL,
 319                 IEEE80211_MFP_REQUIRED
 320         } mfp; /* management frame protection */
 321
 322         unsigned long ibss_join_req;
 323         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 324         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 325
 326         int wmm_last_param_set;
 327
 328         /* Extra IE data for management frames */
 329         u8 *ie_probereq;
 330         size_t ie_probereq_len;
 331         u8 *ie_proberesp;
 332         size_t ie_proberesp_len;
 333         u8 *ie_auth;
 334         size_t ie_auth_len;
 335         u8 *ie_assocreq;
 336         size_t ie_assocreq_len;
 337         u8 *ie_reassocreq;
 338         size_t ie_reassocreq_len;
 339         u8 *ie_deauth;
 340         size_t ie_deauth_len;
 341         u8 *ie_disassoc;
 342         size_t ie_disassoc_len;
 343 };
 344
 345 struct ieee80211_if_mesh {
 346         struct work_struct work;
 347         struct timer_list housekeeping_timer;
 348         struct timer_list mesh_path_timer;
 349         struct sk_buff_head skb_queue;
 350
 351         bool housekeeping;
 352
 353         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 354         size_t mesh_id_len;
 355         /* Active Path Selection Protocol Identifier */
 356         u8 mesh_pp_id[4];
 357         /* Active Path Selection Metric Identifier */
 358         u8 mesh_pm_id[4];
 359         /* Congestion Control Mode Identifier */
 360         u8 mesh_cc_id[4];
 361         /* Local mesh Destination Sequence Number */
 362         u32 dsn;
 363         /* Last used PREQ ID */
 364         u32 preq_id;
 365         atomic_t mpaths;
 366         /* Timestamp of last DSN update */
 367         unsigned long last_dsn_update;
 368         /* Timestamp of last DSN sent */
 369         unsigned long last_preq;
 370         struct mesh_rmc *rmc;
 371         spinlock_t mesh_preq_queue_lock;
 372         struct mesh_preq_queue preq_queue;
 373         int preq_queue_len;
 374         struct mesh_stats mshstats;
 375         struct mesh_config mshcfg;
 376         u32 mesh_seqnum;
 377         bool accepting_plinks;
 378 };
 379
 380 #ifdef CONFIG_MAC80211_MESH
 381 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 382         do { (msh)->mshstats.name++; } while (0)
 383 #else
 384 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 385         do { } while (0)
 386 #endif
 387
 388 /**
 389  * enum ieee80211_sub_if_data_flags - virtual interface flags
 390  *
 391  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 392  * @IEEE80211_SDATA_PROMISC: interface is promisc
 393  * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
 394  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 395  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 396  *      associated stations and deliver multicast frames both
 397  *      back to wireless media and to the local net stack.
 398  */
 399 enum ieee80211_sub_if_data_flags {
 400         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 401         IEEE80211_SDATA_PROMISC                 = BIT(1),
 402         IEEE80211_SDATA_USERSPACE_MLME          = BIT(2),
 403         IEEE80211_SDATA_OPERATING_GMODE         = BIT(3),
 404         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(4),
 405 };
 406
 407 struct ieee80211_sub_if_data {
 408         struct list_head list;
 409
 410         struct wireless_dev wdev;
 411
 412         /* keys */
 413         struct list_head key_list;
 414
 415         struct net_device *dev;
 416         struct ieee80211_local *local;
 417
 418         unsigned int flags;
 419
 420         int drop_unencrypted;
 421
 422         /* Fragment table for host-based reassembly */
 423         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 424         unsigned int fragment_next;
 425
 426 #define NUM_DEFAULT_KEYS 4
 427 #define NUM_DEFAULT_MGMT_KEYS 2
 428         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 429         struct ieee80211_key *default_key;
 430         struct ieee80211_key *default_mgmt_key;
 431
 432         u16 sequence_number;
 433
 434         /*
 435          * AP this belongs to: self in AP mode and
 436          * corresponding AP in VLAN mode, NULL for
 437          * all others (might be needed later in IBSS)
 438          */
 439         struct ieee80211_if_ap *bss;
 440
 441         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 442         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 443
 444         union {
 445                 struct ieee80211_if_ap ap;
 446                 struct ieee80211_if_wds wds;
 447                 struct ieee80211_if_vlan vlan;
 448                 struct ieee80211_if_sta sta;
 449 #ifdef CONFIG_MAC80211_MESH
 450                 struct ieee80211_if_mesh mesh;
 451 #endif
 452                 u32 mntr_flags;
 453         } u;
 454
 455 #ifdef CONFIG_MAC80211_DEBUGFS
 456         struct dentry *debugfsdir;
 457         union {
 458                 struct {
 459                         struct dentry *drop_unencrypted;
 460                         struct dentry *state;
 461                         struct dentry *bssid;
 462                         struct dentry *prev_bssid;
 463                         struct dentry *ssid_len;
 464                         struct dentry *aid;
 465                         struct dentry *ap_capab;
 466                         struct dentry *capab;
 467                         struct dentry *extra_ie_len;
 468                         struct dentry *auth_tries;
 469                         struct dentry *assoc_tries;
 470                         struct dentry *auth_algs;
 471                         struct dentry *auth_alg;
 472                         struct dentry *auth_transaction;
 473                         struct dentry *flags;
 474                         struct dentry *force_unicast_rateidx;
 475                         struct dentry *max_ratectrl_rateidx;
 476                 } sta;
 477                 struct {
 478                         struct dentry *drop_unencrypted;
 479                         struct dentry *num_sta_ps;
 480                         struct dentry *dtim_count;
 481                         struct dentry *force_unicast_rateidx;
 482                         struct dentry *max_ratectrl_rateidx;
 483                         struct dentry *num_buffered_multicast;
 484                 } ap;
 485                 struct {
 486                         struct dentry *drop_unencrypted;
 487                         struct dentry *peer;
 488                         struct dentry *force_unicast_rateidx;
 489                         struct dentry *max_ratectrl_rateidx;
 490                 } wds;
 491                 struct {
 492                         struct dentry *drop_unencrypted;
 493                         struct dentry *force_unicast_rateidx;
 494                         struct dentry *max_ratectrl_rateidx;
 495                 } vlan;
 496                 struct {
 497                         struct dentry *mode;
 498                 } monitor;
 499         } debugfs;
 500         struct {
 501                 struct dentry *default_key;
 502                 struct dentry *default_mgmt_key;
 503         } common_debugfs;
 504
 505 #ifdef CONFIG_MAC80211_MESH
 506         struct dentry *mesh_stats_dir;
 507         struct {
 508                 struct dentry *fwded_frames;
 509                 struct dentry *dropped_frames_ttl;
 510                 struct dentry *dropped_frames_no_route;
 511                 struct dentry *estab_plinks;
 512                 struct timer_list mesh_path_timer;
 513         } mesh_stats;
 514
 515         struct dentry *mesh_config_dir;
 516         struct {
 517                 struct dentry *dot11MeshRetryTimeout;
 518                 struct dentry *dot11MeshConfirmTimeout;
 519                 struct dentry *dot11MeshHoldingTimeout;
 520                 struct dentry *dot11MeshMaxRetries;
 521                 struct dentry *dot11MeshTTL;
 522                 struct dentry *auto_open_plinks;
 523                 struct dentry *dot11MeshMaxPeerLinks;
 524                 struct dentry *dot11MeshHWMPactivePathTimeout;
 525                 struct dentry *dot11MeshHWMPpreqMinInterval;
 526                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 527                 struct dentry *dot11MeshHWMPmaxPREQretries;
 528                 struct dentry *path_refresh_time;
 529                 struct dentry *min_discovery_timeout;
 530         } mesh_config;
 531 #endif
 532
 533 #endif
 534         /* must be last, dynamically sized area in this! */
 535         struct ieee80211_vif vif;
 536 };
 537
 538 static inline
 539 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 540 {
 541         return container_of(p, struct ieee80211_sub_if_data, vif);
 542 }
 543
 544 static inline void
 545 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 546                             u8 mesh_id_len, u8 *mesh_id)
 547 {
 548 #ifdef CONFIG_MAC80211_MESH
 549         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 550         ifmsh->mesh_id_len = mesh_id_len;
 551         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 552 #else
 553         WARN_ON(1);
 554 #endif
 555 }
 556
 557 enum {
 558         IEEE80211_RX_MSG        = 1,
 559         IEEE80211_TX_STATUS_MSG = 2,
 560         IEEE80211_DELBA_MSG     = 3,
 561         IEEE80211_ADDBA_MSG     = 4,
 562 };
 563
 564 enum queue_stop_reason {
 565         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 566         IEEE80211_QUEUE_STOP_REASON_PS,
 567         IEEE80211_QUEUE_STOP_REASON_CSA
 568 };
 569
 570 /* maximum number of hardware queues we support. */
 571 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 572
 573 struct ieee80211_master_priv {
 574         struct ieee80211_local *local;
 575 };
 576
 577 struct ieee80211_local {
 578         /* embed the driver visible part.
 579          * don't cast (use the static inlines below), but we keep
 580          * it first anyway so they become a no-op */
 581         struct ieee80211_hw hw;
 582
 583         const struct ieee80211_ops *ops;
 584
 585         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 586         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 587         spinlock_t queue_stop_reason_lock;
 588         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 589         int open_count;
 590         int monitors, cooked_mntrs;
 591         /* number of interfaces with corresponding FIF_ flags */
 592         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 593         unsigned int filter_flags; /* FIF_* */
 594         struct iw_statistics wstats;
 595         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 596         int tx_headroom; /* required headroom for hardware/radiotap */
 597
 598         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 599          * added to skb_queue will be processed, but frames in
 600          * skb_queue_unreliable may be dropped if the total length of these
 601          * queues increases over the limit. */
 602 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 603         struct tasklet_struct tasklet;
 604         struct sk_buff_head skb_queue;
 605         struct sk_buff_head skb_queue_unreliable;
 606
 607         /* Station data */
 608         /*
 609          * The lock only protects the list, hash, timer and counter
 610          * against manipulation, reads are done in RCU. Additionally,
 611          * the lock protects each BSS's TIM bitmap.
 612          */
 613         spinlock_t sta_lock;
 614         unsigned long num_sta;
 615         struct list_head sta_list;
 616         struct list_head sta_flush_list;
 617         struct work_struct sta_flush_work;
 618         struct sta_info *sta_hash[STA_HASH_SIZE];
 619         struct timer_list sta_cleanup;
 620
 621         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 622         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 623         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 624         struct tasklet_struct tx_pending_tasklet;
 625
 626         /* number of interfaces with corresponding IFF_ flags */
 627         atomic_t iff_allmultis, iff_promiscs;
 628
 629         struct rate_control_ref *rate_ctrl;
 630
 631         int rts_threshold;
 632         int fragmentation_threshold;
 633
 634         struct crypto_blkcipher *wep_tx_tfm;
 635         struct crypto_blkcipher *wep_rx_tfm;
 636         u32 wep_iv;
 637
 638         /* see iface.c */
 639         struct list_head interfaces;
 640         struct mutex iflist_mtx;
 641
 642         /*
 643          * Key lock, protects sdata's key_list and sta_info's
 644          * key pointers (write access, they're RCU.)
 645          */
 646         spinlock_t key_lock;
 647
 648
 649         /* Scanning and BSS list */
 650         bool sw_scanning, hw_scanning;
 651         struct cfg80211_ssid scan_ssid;
 652         struct cfg80211_scan_request int_scan_req;
 653         struct cfg80211_scan_request *scan_req;
 654         struct ieee80211_channel *scan_channel;
 655         int scan_channel_idx;
 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         enum nl80211_channel_type oper_channel_type;
 662         struct ieee80211_channel *oper_channel, *csa_channel;
 663
 664         /* SNMP counters */
 665         /* dot11CountersTable */
 666         u32 dot11TransmittedFragmentCount;
 667         u32 dot11MulticastTransmittedFrameCount;
 668         u32 dot11FailedCount;
 669         u32 dot11RetryCount;
 670         u32 dot11MultipleRetryCount;
 671         u32 dot11FrameDuplicateCount;
 672         u32 dot11ReceivedFragmentCount;
 673         u32 dot11MulticastReceivedFrameCount;
 674         u32 dot11TransmittedFrameCount;
 675
 676 #ifdef CONFIG_MAC80211_LEDS
 677         int tx_led_counter, rx_led_counter;
 678         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 679         char tx_led_name[32], rx_led_name[32],
 680              assoc_led_name[32], radio_led_name[32];
 681 #endif
 682
 683 #ifdef CONFIG_MAC80211_DEBUGFS
 684         struct work_struct sta_debugfs_add;
 685 #endif
 686
 687 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 688         /* TX/RX handler statistics */
 689         unsigned int tx_handlers_drop;
 690         unsigned int tx_handlers_queued;
 691         unsigned int tx_handlers_drop_unencrypted;
 692         unsigned int tx_handlers_drop_fragment;
 693         unsigned int tx_handlers_drop_wep;
 694         unsigned int tx_handlers_drop_not_assoc;
 695         unsigned int tx_handlers_drop_unauth_port;
 696         unsigned int rx_handlers_drop;
 697         unsigned int rx_handlers_queued;
 698         unsigned int rx_handlers_drop_nullfunc;
 699         unsigned int rx_handlers_drop_defrag;
 700         unsigned int rx_handlers_drop_short;
 701         unsigned int rx_handlers_drop_passive_scan;
 702         unsigned int tx_expand_skb_head;
 703         unsigned int tx_expand_skb_head_cloned;
 704         unsigned int rx_expand_skb_head;
 705         unsigned int rx_expand_skb_head2;
 706         unsigned int rx_handlers_fragments;
 707         unsigned int tx_status_drop;
 708 #define I802_DEBUG_INC(c) (c)++
 709 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 710 #define I802_DEBUG_INC(c) do { } while (0)
 711 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 712
 713
 714         int total_ps_buffered; /* total number of all buffered unicast and
 715                                 * multicast packets for power saving stations
 716                                 */
 717         int wifi_wme_noack_test;
 718         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 719
 720         bool powersave;
 721         bool pspolling;
 722         struct work_struct dynamic_ps_enable_work;
 723         struct work_struct dynamic_ps_disable_work;
 724         struct timer_list dynamic_ps_timer;
 725
 726         int user_power_level; /* in dBm */
 727         int power_constr_level; /* in dBm */
 728
 729 #ifdef CONFIG_MAC80211_DEBUGFS
 730         struct local_debugfsdentries {
 731                 struct dentry *rcdir;
 732                 struct dentry *rcname;
 733                 struct dentry *frequency;
 734                 struct dentry *rts_threshold;
 735                 struct dentry *fragmentation_threshold;
 736                 struct dentry *short_retry_limit;
 737                 struct dentry *long_retry_limit;
 738                 struct dentry *total_ps_buffered;
 739                 struct dentry *wep_iv;
 740                 struct dentry *tsf;
 741                 struct dentry *statistics;
 742                 struct local_debugfsdentries_statsdentries {
 743                         struct dentry *transmitted_fragment_count;
 744                         struct dentry *multicast_transmitted_frame_count;
 745                         struct dentry *failed_count;
 746                         struct dentry *retry_count;
 747                         struct dentry *multiple_retry_count;
 748                         struct dentry *frame_duplicate_count;
 749                         struct dentry *received_fragment_count;
 750                         struct dentry *multicast_received_frame_count;
 751                         struct dentry *transmitted_frame_count;
 752                         struct dentry *wep_undecryptable_count;
 753                         struct dentry *num_scans;
 754 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 755                         struct dentry *tx_handlers_drop;
 756                         struct dentry *tx_handlers_queued;
 757                         struct dentry *tx_handlers_drop_unencrypted;
 758                         struct dentry *tx_handlers_drop_fragment;
 759                         struct dentry *tx_handlers_drop_wep;
 760                         struct dentry *tx_handlers_drop_not_assoc;
 761                         struct dentry *tx_handlers_drop_unauth_port;
 762                         struct dentry *rx_handlers_drop;
 763                         struct dentry *rx_handlers_queued;
 764                         struct dentry *rx_handlers_drop_nullfunc;
 765                         struct dentry *rx_handlers_drop_defrag;
 766                         struct dentry *rx_handlers_drop_short;
 767                         struct dentry *rx_handlers_drop_passive_scan;
 768                         struct dentry *tx_expand_skb_head;
 769                         struct dentry *tx_expand_skb_head_cloned;
 770                         struct dentry *rx_expand_skb_head;
 771                         struct dentry *rx_expand_skb_head2;
 772                         struct dentry *rx_handlers_fragments;
 773                         struct dentry *tx_status_drop;
 774 #endif
 775                         struct dentry *dot11ACKFailureCount;
 776                         struct dentry *dot11RTSFailureCount;
 777                         struct dentry *dot11FCSErrorCount;
 778                         struct dentry *dot11RTSSuccessCount;
 779                 } stats;
 780                 struct dentry *stations;
 781                 struct dentry *keys;
 782         } debugfs;
 783 #endif
 784 };
 785
 786 static inline struct ieee80211_sub_if_data *
 787 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 788 {
 789         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 790
 791         BUG_ON(!local || local->mdev == dev);
 792
 793         return netdev_priv(dev);
 794 }
 795
 796 /* this struct represents 802.11n's RA/TID combination */
 797 struct ieee80211_ra_tid {
 798         u8 ra[ETH_ALEN];
 799         u16 tid;
 800 };
 801
 802 /* Parsed Information Elements */
 803 struct ieee802_11_elems {
 804         u8 *ie_start;
 805         size_t total_len;
 806
 807         /* pointers to IEs */
 808         u8 *ssid;
 809         u8 *supp_rates;
 810         u8 *fh_params;
 811         u8 *ds_params;
 812         u8 *cf_params;
 813         u8 *tim;
 814         u8 *ibss_params;
 815         u8 *challenge;
 816         u8 *wpa;
 817         u8 *rsn;
 818         u8 *erp_info;
 819         u8 *ext_supp_rates;
 820         u8 *wmm_info;
 821         u8 *wmm_param;
 822         struct ieee80211_ht_cap *ht_cap_elem;
 823         struct ieee80211_ht_info *ht_info_elem;
 824         u8 *mesh_config;
 825         u8 *mesh_id;
 826         u8 *peer_link;
 827         u8 *preq;
 828         u8 *prep;
 829         u8 *perr;
 830         u8 *ch_switch_elem;
 831         u8 *country_elem;
 832         u8 *pwr_constr_elem;
 833         u8 *quiet_elem;         /* first quite element */
 834         u8 *timeout_int;
 835
 836         /* length of them, respectively */
 837         u8 ssid_len;
 838         u8 supp_rates_len;
 839         u8 fh_params_len;
 840         u8 ds_params_len;
 841         u8 cf_params_len;
 842         u8 tim_len;
 843         u8 ibss_params_len;
 844         u8 challenge_len;
 845         u8 wpa_len;
 846         u8 rsn_len;
 847         u8 erp_info_len;
 848         u8 ext_supp_rates_len;
 849         u8 wmm_info_len;
 850         u8 wmm_param_len;
 851         u8 mesh_config_len;
 852         u8 mesh_id_len;
 853         u8 peer_link_len;
 854         u8 preq_len;
 855         u8 prep_len;
 856         u8 perr_len;
 857         u8 ch_switch_elem_len;
 858         u8 country_elem_len;
 859         u8 pwr_constr_elem_len;
 860         u8 quiet_elem_len;
 861         u8 num_of_quiet_elem;   /* can be more the one */
 862         u8 timeout_int_len;
 863 };
 864
 865 static inline struct ieee80211_local *hw_to_local(
 866         struct ieee80211_hw *hw)
 867 {
 868         return container_of(hw, struct ieee80211_local, hw);
 869 }
 870
 871 static inline struct ieee80211_hw *local_to_hw(
 872         struct ieee80211_local *local)
 873 {
 874         return &local->hw;
 875 }
 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, u32 changed);
 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 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 889                                       u32 changed);
 890 void ieee80211_configure_filter(struct ieee80211_local *local);
 891
 892 /* wireless extensions */
 893 extern const struct iw_handler_def ieee80211_iw_handler_def;
 894
 895 /* STA/IBSS code */
 896 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 897 void ieee80211_scan_work(struct work_struct *work);
 898 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 899                            struct ieee80211_rx_status *rx_status);
 900 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 901 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 902 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 903 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 904                             struct ieee80211_if_sta *ifsta);
 905 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 906                                         u8 *bssid, u8 *addr, u32 supp_rates);
 907 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 908 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 909 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 910 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 911                             struct ieee802_11_elems *elems,
 912                             enum ieee80211_band band);
 913 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 914                               u8 *ssid, size_t ssid_len);
 915 void ieee80211_send_pspoll(struct ieee80211_local *local,
 916                            struct ieee80211_sub_if_data *sdata);
 917
 918 /* scan/BSS handling */
 919 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 920                            struct cfg80211_scan_request *req);
 921 int ieee80211_scan_results(struct ieee80211_local *local,
 922                            struct iw_request_info *info,
 923                            char *buf, size_t len);
 924 ieee80211_rx_result
 925 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
 926                   struct sk_buff *skb,
 927                   struct ieee80211_rx_status *rx_status);
 928 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 929                                char *ie, size_t len);
 930
 931 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 932 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 933                          struct cfg80211_scan_request *req);
 934 struct ieee80211_bss *
 935 ieee80211_bss_info_update(struct ieee80211_local *local,
 936                           struct ieee80211_rx_status *rx_status,
 937                           struct ieee80211_mgmt *mgmt,
 938                           size_t len,
 939                           struct ieee802_11_elems *elems,
 940                           struct ieee80211_channel *channel,
 941                           bool beacon);
 942 struct ieee80211_bss *
 943 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 944                      u8 *ssid, u8 ssid_len);
 945 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 946                           struct ieee80211_bss *bss);
 947 void ieee80211_rx_bss_remove(struct ieee80211_sub_if_data *sdata, u8 *bssid,
 948                              int freq, u8 *ssid, u8 ssid_len);
 949
 950 /* interface handling */
 951 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 952                      struct net_device **new_dev, enum nl80211_iftype type,
 953                      struct vif_params *params);
 954 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 955                              enum nl80211_iftype type);
 956 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 957 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 958
 959 /* tx handling */
 960 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 961 void ieee80211_tx_pending(unsigned long data);
 962 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 963 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 964 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 965
 966 /* HT */
 967 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 968                                        struct ieee80211_ht_cap *ht_cap_ie,
 969                                        struct ieee80211_sta_ht_cap *ht_cap);
 970 u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
 971                         struct ieee80211_ht_info *hti,
 972                         u16 ap_ht_cap_flags);
 973 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 974 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
 975                           const u8 *da, u16 tid,
 976                           u16 initiator, u16 reason_code);
 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_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 981                                     u16 initiator, u16 reason);
 982 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
 983 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 984                              struct sta_info *sta,
 985                              struct ieee80211_mgmt *mgmt, size_t len);
 986 void ieee80211_process_addba_resp(struct ieee80211_local *local,
 987                                   struct sta_info *sta,
 988                                   struct ieee80211_mgmt *mgmt,
 989                                   size_t len);
 990 void ieee80211_process_addba_request(struct ieee80211_local *local,
 991                                      struct sta_info *sta,
 992                                      struct ieee80211_mgmt *mgmt,
 993                                      size_t len);
 994
 995 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 996                                    enum ieee80211_back_parties initiator);
 997
 998 /* Spectrum management */
 999 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1000                                        struct ieee80211_mgmt *mgmt,
1001                                        size_t len);
1002 void ieee80211_chswitch_timer(unsigned long data);
1003 void ieee80211_chswitch_work(struct work_struct *work);
1004 void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1005                                   struct ieee80211_channel_sw_ie *sw_elem,
1006                                   struct ieee80211_bss *bss);
1007 void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1008                                  u16 capab_info, u8 *pwr_constr_elem,
1009                                  u8 pwr_constr_elem_len);
1010
1011 /* Suspend/resume */
1012 int __ieee80211_suspend(struct ieee80211_hw *hw);
1013 int __ieee80211_resume(struct ieee80211_hw *hw);
1014
1015 /* utility functions/constants */
1016 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1017 extern const unsigned char rfc1042_header[6];
1018 extern const unsigned char bridge_tunnel_header[6];
1019 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1020                         enum nl80211_iftype type);
1021 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1022                              int rate, int erp, int short_preamble);
1023 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1024                                      struct ieee80211_hdr *hdr);
1025 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1026 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1027                       int encrypt);
1028 void ieee802_11_parse_elems(u8 *start, size_t len,
1029                             struct ieee802_11_elems *elems);
1030 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1031 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1032                               enum ieee80211_band band);
1033
1034 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1035 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1036 void ieee80211_dynamic_ps_timer(unsigned long data);
1037 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1038                              struct ieee80211_sub_if_data *sdata,
1039                              int powersave);
1040
1041 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1042                                      enum queue_stop_reason reason);
1043 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1044                                      enum queue_stop_reason reason);
1045
1046 #ifdef CONFIG_MAC80211_NOINLINE
1047 #define debug_noinline noinline
1048 #else
1049 #define debug_noinline
1050 #endif
1051
1052 #endif /* IEEE80211_I_H */