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/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 18 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 #define TU_TO_EXP_TIME(x) (jiffies + usecs_to_jiffies((x) * 1024)) 60 61 struct ieee80211_fragment_entry { 62 unsigned long first_frag_time; 63 unsigned int seq; 64 unsigned int rx_queue; 65 unsigned int last_frag; 66 unsigned int extra_len; 67 struct sk_buff_head skb_list; 68 int ccmp; /* Whether fragments were encrypted with CCMP */ 69 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */ 70 }; 71 72 73 struct ieee80211_bss { 74 /* Yes, this is a hack */ 75 struct cfg80211_bss cbss; 76 77 /* don't want to look up all the time */ 78 size_t ssid_len; 79 u8 ssid[IEEE80211_MAX_SSID_LEN]; 80 81 u8 dtim_period; 82 83 bool wmm_used; 84 85 unsigned long last_probe_resp; 86 87 #ifdef CONFIG_MAC80211_MESH 88 u8 *mesh_id; 89 size_t mesh_id_len; 90 u8 *mesh_cfg; 91 #endif 92 93 #define IEEE80211_MAX_SUPP_RATES 32 94 u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; 95 size_t supp_rates_len; 96 97 /* 98 * During assocation, we save an ERP value from a probe response so 99 * that we can feed ERP info to the driver when handling the 100 * association completes. these fields probably won't be up-to-date 101 * otherwise, you probably don't want to use them. 102 */ 103 bool has_erp_value; 104 u8 erp_value; 105 }; 106 107 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss) 108 { 109 #ifdef CONFIG_MAC80211_MESH 110 return bss->mesh_cfg; 111 #endif 112 return NULL; 113 } 114 115 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss) 116 { 117 #ifdef CONFIG_MAC80211_MESH 118 return bss->mesh_id; 119 #endif 120 return NULL; 121 } 122 123 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss) 124 { 125 #ifdef CONFIG_MAC80211_MESH 126 return bss->mesh_id_len; 127 #endif 128 return 0; 129 } 130 131 132 typedef unsigned __bitwise__ ieee80211_tx_result; 133 #define TX_CONTINUE ((__force ieee80211_tx_result) 0u) 134 #define TX_DROP ((__force ieee80211_tx_result) 1u) 135 #define TX_QUEUED ((__force ieee80211_tx_result) 2u) 136 137 #define IEEE80211_TX_FRAGMENTED BIT(0) 138 #define IEEE80211_TX_UNICAST BIT(1) 139 #define IEEE80211_TX_PS_BUFFERED BIT(2) 140 141 struct ieee80211_tx_data { 142 struct sk_buff *skb; 143 struct net_device *dev; 144 struct ieee80211_local *local; 145 struct ieee80211_sub_if_data *sdata; 146 struct sta_info *sta; 147 struct ieee80211_key *key; 148 149 struct ieee80211_channel *channel; 150 151 u16 ethertype; 152 unsigned int flags; 153 }; 154 155 156 typedef unsigned __bitwise__ ieee80211_rx_result; 157 #define RX_CONTINUE ((__force ieee80211_rx_result) 0u) 158 #define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u) 159 #define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u) 160 #define RX_QUEUED ((__force ieee80211_rx_result) 3u) 161 162 #define IEEE80211_RX_IN_SCAN BIT(0) 163 /* frame is destined to interface currently processed (incl. multicast frames) */ 164 #define IEEE80211_RX_RA_MATCH BIT(1) 165 #define IEEE80211_RX_AMSDU BIT(2) 166 #define IEEE80211_RX_CMNTR_REPORTED BIT(3) 167 #define IEEE80211_RX_FRAGMENTED BIT(4) 168 169 struct ieee80211_rx_data { 170 struct sk_buff *skb; 171 struct net_device *dev; 172 struct ieee80211_local *local; 173 struct ieee80211_sub_if_data *sdata; 174 struct sta_info *sta; 175 struct ieee80211_key *key; 176 struct ieee80211_rx_status *status; 177 struct ieee80211_rate *rate; 178 179 unsigned int flags; 180 int sent_ps_buffered; 181 int queue; 182 u32 tkip_iv32; 183 u16 tkip_iv16; 184 }; 185 186 struct beacon_data { 187 u8 *head, *tail; 188 int head_len, tail_len; 189 int dtim_period; 190 }; 191 192 struct ieee80211_if_ap { 193 struct beacon_data *beacon; 194 195 struct list_head vlans; 196 197 /* yes, this looks ugly, but guarantees that we can later use 198 * bitmap_empty :) 199 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */ 200 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]; 201 struct sk_buff_head ps_bc_buf; 202 atomic_t num_sta_ps; /* number of stations in PS mode */ 203 int dtim_count; 204 }; 205 206 struct ieee80211_if_wds { 207 struct sta_info *sta; 208 u8 remote_addr[ETH_ALEN]; 209 }; 210 211 struct ieee80211_if_vlan { 212 struct list_head list; 213 }; 214 215 struct mesh_stats { 216 __u32 fwded_frames; /* Mesh forwarded frames */ 217 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/ 218 __u32 dropped_frames_no_route; /* Not transmitted, no route found */ 219 atomic_t estab_plinks; 220 }; 221 222 #define PREQ_Q_F_START 0x1 223 #define PREQ_Q_F_REFRESH 0x2 224 struct mesh_preq_queue { 225 struct list_head list; 226 u8 dst[ETH_ALEN]; 227 u8 flags; 228 }; 229 230 /* flags used in struct ieee80211_if_managed.flags */ 231 #define IEEE80211_STA_SSID_SET BIT(0) 232 #define IEEE80211_STA_BSSID_SET BIT(1) 233 #define IEEE80211_STA_PREV_BSSID_SET BIT(2) 234 #define IEEE80211_STA_AUTHENTICATED BIT(3) 235 #define IEEE80211_STA_ASSOCIATED BIT(4) 236 #define IEEE80211_STA_PROBEREQ_POLL BIT(5) 237 #define IEEE80211_STA_CREATE_IBSS BIT(6) 238 #define IEEE80211_STA_CONTROL_PORT BIT(7) 239 #define IEEE80211_STA_WMM_ENABLED BIT(8) 240 /* hole at 9, please re-use */ 241 #define IEEE80211_STA_AUTO_SSID_SEL BIT(10) 242 #define IEEE80211_STA_AUTO_BSSID_SEL BIT(11) 243 #define IEEE80211_STA_AUTO_CHANNEL_SEL BIT(12) 244 #define IEEE80211_STA_PRIVACY_INVOKED BIT(13) 245 #define IEEE80211_STA_TKIP_WEP_USED BIT(14) 246 #define IEEE80211_STA_CSA_RECEIVED BIT(15) 247 #define IEEE80211_STA_MFP_ENABLED BIT(16) 248 #define IEEE80211_STA_EXT_SME BIT(17) 249 /* flags for MLME request */ 250 #define IEEE80211_STA_REQ_SCAN 0 251 #define IEEE80211_STA_REQ_AUTH 1 252 #define IEEE80211_STA_REQ_RUN 2 253 254 /* bitfield of allowed auth algs */ 255 #define IEEE80211_AUTH_ALG_OPEN BIT(0) 256 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1) 257 #define IEEE80211_AUTH_ALG_LEAP BIT(2) 258 #define IEEE80211_AUTH_ALG_FT BIT(3) 259 260 struct ieee80211_if_managed { 261 struct timer_list timer; 262 struct timer_list chswitch_timer; 263 struct work_struct work; 264 struct work_struct chswitch_work; 265 struct work_struct beacon_loss_work; 266 267 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; 268 269 u8 ssid[IEEE80211_MAX_SSID_LEN]; 270 size_t ssid_len; 271 272 enum { 273 IEEE80211_STA_MLME_DISABLED, 274 IEEE80211_STA_MLME_DIRECT_PROBE, 275 IEEE80211_STA_MLME_AUTHENTICATE, 276 IEEE80211_STA_MLME_ASSOCIATE, 277 IEEE80211_STA_MLME_ASSOCIATED, 278 } state; 279 280 u16 aid; 281 u16 ap_capab, capab; 282 u8 *extra_ie; /* to be added to the end of AssocReq */ 283 size_t extra_ie_len; 284 285 /* The last AssocReq/Resp IEs */ 286 u8 *assocreq_ies, *assocresp_ies; 287 size_t assocreq_ies_len, assocresp_ies_len; 288 289 struct sk_buff_head skb_queue; 290 291 int assoc_scan_tries; /* number of scans done pre-association */ 292 int direct_probe_tries; /* retries for direct probes */ 293 int auth_tries; /* retries for auth req */ 294 int assoc_tries; /* retries for assoc req */ 295 296 unsigned long timers_running; /* used for quiesce/restart */ 297 bool powersave; /* powersave requested for this iface */ 298 299 unsigned long request; 300 301 unsigned long last_probe; 302 unsigned long last_beacon; 303 304 unsigned int flags; 305 306 unsigned int auth_algs; /* bitfield of allowed auth algs */ 307 int auth_alg; /* currently used IEEE 802.11 authentication algorithm */ 308 int auth_transaction; 309 310 u32 beacon_crc; 311 312 enum { 313 IEEE80211_MFP_DISABLED, 314 IEEE80211_MFP_OPTIONAL, 315 IEEE80211_MFP_REQUIRED 316 } mfp; /* management frame protection */ 317 318 int wmm_last_param_set; 319 320 /* Extra IE data for management frames */ 321 u8 *sme_auth_ie; 322 size_t sme_auth_ie_len; 323 }; 324 325 enum ieee80211_ibss_request { 326 IEEE80211_IBSS_REQ_RUN = 0, 327 }; 328 329 struct ieee80211_if_ibss { 330 struct timer_list timer; 331 struct work_struct work; 332 333 struct sk_buff_head skb_queue; 334 335 unsigned long request; 336 unsigned long last_scan_completed; 337 338 bool timer_running; 339 340 bool fixed_bssid; 341 bool fixed_channel; 342 343 u8 bssid[ETH_ALEN]; 344 u8 ssid[IEEE80211_MAX_SSID_LEN]; 345 u8 ssid_len, ie_len; 346 u8 *ie; 347 struct ieee80211_channel *channel; 348 349 unsigned long ibss_join_req; 350 /* probe response/beacon for IBSS */ 351 struct sk_buff *presp, *skb; 352 353 enum { 354 IEEE80211_IBSS_MLME_SEARCH, 355 IEEE80211_IBSS_MLME_JOINED, 356 } state; 357 }; 358 359 struct ieee80211_if_mesh { 360 struct work_struct work; 361 struct timer_list housekeeping_timer; 362 struct timer_list mesh_path_timer; 363 struct sk_buff_head skb_queue; 364 365 unsigned long timers_running; 366 367 bool housekeeping; 368 369 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN]; 370 size_t mesh_id_len; 371 /* Active Path Selection Protocol Identifier */ 372 u8 mesh_pp_id[4]; 373 /* Active Path Selection Metric Identifier */ 374 u8 mesh_pm_id[4]; 375 /* Congestion Control Mode Identifier */ 376 u8 mesh_cc_id[4]; 377 /* Local mesh Destination Sequence Number */ 378 u32 dsn; 379 /* Last used PREQ ID */ 380 u32 preq_id; 381 atomic_t mpaths; 382 /* Timestamp of last DSN update */ 383 unsigned long last_dsn_update; 384 /* Timestamp of last DSN sent */ 385 unsigned long last_preq; 386 struct mesh_rmc *rmc; 387 spinlock_t mesh_preq_queue_lock; 388 struct mesh_preq_queue preq_queue; 389 int preq_queue_len; 390 struct mesh_stats mshstats; 391 struct mesh_config mshcfg; 392 u32 mesh_seqnum; 393 bool accepting_plinks; 394 }; 395 396 #ifdef CONFIG_MAC80211_MESH 397 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \ 398 do { (msh)->mshstats.name++; } while (0) 399 #else 400 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \ 401 do { } while (0) 402 #endif 403 404 /** 405 * enum ieee80211_sub_if_data_flags - virtual interface flags 406 * 407 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets 408 * @IEEE80211_SDATA_PROMISC: interface is promisc 409 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode 410 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between 411 * associated stations and deliver multicast frames both 412 * back to wireless media and to the local net stack. 413 */ 414 enum ieee80211_sub_if_data_flags { 415 IEEE80211_SDATA_ALLMULTI = BIT(0), 416 IEEE80211_SDATA_PROMISC = BIT(1), 417 IEEE80211_SDATA_OPERATING_GMODE = BIT(2), 418 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3), 419 }; 420 421 struct ieee80211_sub_if_data { 422 struct list_head list; 423 424 struct wireless_dev wdev; 425 426 /* keys */ 427 struct list_head key_list; 428 429 struct net_device *dev; 430 struct ieee80211_local *local; 431 432 unsigned int flags; 433 434 int drop_unencrypted; 435 436 /* 437 * keep track of whether the HT opmode (stored in 438 * vif.bss_info.ht_operation_mode) is valid. 439 */ 440 bool ht_opmode_valid; 441 442 /* Fragment table for host-based reassembly */ 443 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX]; 444 unsigned int fragment_next; 445 446 #define NUM_DEFAULT_KEYS 4 447 #define NUM_DEFAULT_MGMT_KEYS 2 448 struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 449 struct ieee80211_key *default_key; 450 struct ieee80211_key *default_mgmt_key; 451 452 u16 sequence_number; 453 454 /* 455 * AP this belongs to: self in AP mode and 456 * corresponding AP in VLAN mode, NULL for 457 * all others (might be needed later in IBSS) 458 */ 459 struct ieee80211_if_ap *bss; 460 461 int force_unicast_rateidx; /* forced TX rateidx for unicast frames */ 462 int max_ratectrl_rateidx; /* max TX rateidx for rate control */ 463 464 union { 465 struct ieee80211_if_ap ap; 466 struct ieee80211_if_wds wds; 467 struct ieee80211_if_vlan vlan; 468 struct ieee80211_if_managed mgd; 469 struct ieee80211_if_ibss ibss; 470 #ifdef CONFIG_MAC80211_MESH 471 struct ieee80211_if_mesh mesh; 472 #endif 473 u32 mntr_flags; 474 } u; 475 476 #ifdef CONFIG_MAC80211_DEBUGFS 477 struct dentry *debugfsdir; 478 union { 479 struct { 480 struct dentry *drop_unencrypted; 481 struct dentry *state; 482 struct dentry *bssid; 483 struct dentry *prev_bssid; 484 struct dentry *ssid_len; 485 struct dentry *aid; 486 struct dentry *ap_capab; 487 struct dentry *capab; 488 struct dentry *extra_ie_len; 489 struct dentry *auth_tries; 490 struct dentry *assoc_tries; 491 struct dentry *auth_algs; 492 struct dentry *auth_alg; 493 struct dentry *auth_transaction; 494 struct dentry *flags; 495 struct dentry *force_unicast_rateidx; 496 struct dentry *max_ratectrl_rateidx; 497 } sta; 498 struct { 499 struct dentry *drop_unencrypted; 500 struct dentry *num_sta_ps; 501 struct dentry *dtim_count; 502 struct dentry *force_unicast_rateidx; 503 struct dentry *max_ratectrl_rateidx; 504 struct dentry *num_buffered_multicast; 505 } ap; 506 struct { 507 struct dentry *drop_unencrypted; 508 struct dentry *peer; 509 struct dentry *force_unicast_rateidx; 510 struct dentry *max_ratectrl_rateidx; 511 } wds; 512 struct { 513 struct dentry *drop_unencrypted; 514 struct dentry *force_unicast_rateidx; 515 struct dentry *max_ratectrl_rateidx; 516 } vlan; 517 struct { 518 struct dentry *mode; 519 } monitor; 520 } debugfs; 521 struct { 522 struct dentry *default_key; 523 struct dentry *default_mgmt_key; 524 } common_debugfs; 525 526 #ifdef CONFIG_MAC80211_MESH 527 struct dentry *mesh_stats_dir; 528 struct { 529 struct dentry *fwded_frames; 530 struct dentry *dropped_frames_ttl; 531 struct dentry *dropped_frames_no_route; 532 struct dentry *estab_plinks; 533 struct timer_list mesh_path_timer; 534 } mesh_stats; 535 536 struct dentry *mesh_config_dir; 537 struct { 538 struct dentry *dot11MeshRetryTimeout; 539 struct dentry *dot11MeshConfirmTimeout; 540 struct dentry *dot11MeshHoldingTimeout; 541 struct dentry *dot11MeshMaxRetries; 542 struct dentry *dot11MeshTTL; 543 struct dentry *auto_open_plinks; 544 struct dentry *dot11MeshMaxPeerLinks; 545 struct dentry *dot11MeshHWMPactivePathTimeout; 546 struct dentry *dot11MeshHWMPpreqMinInterval; 547 struct dentry *dot11MeshHWMPnetDiameterTraversalTime; 548 struct dentry *dot11MeshHWMPmaxPREQretries; 549 struct dentry *path_refresh_time; 550 struct dentry *min_discovery_timeout; 551 } mesh_config; 552 #endif 553 554 #endif 555 /* must be last, dynamically sized area in this! */ 556 struct ieee80211_vif vif; 557 }; 558 559 static inline 560 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p) 561 { 562 return container_of(p, struct ieee80211_sub_if_data, vif); 563 } 564 565 static inline void 566 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata, 567 u8 mesh_id_len, u8 *mesh_id) 568 { 569 #ifdef CONFIG_MAC80211_MESH 570 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 571 ifmsh->mesh_id_len = mesh_id_len; 572 memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len); 573 #else 574 WARN_ON(1); 575 #endif 576 } 577 578 enum { 579 IEEE80211_RX_MSG = 1, 580 IEEE80211_TX_STATUS_MSG = 2, 581 IEEE80211_DELBA_MSG = 3, 582 IEEE80211_ADDBA_MSG = 4, 583 }; 584 585 enum queue_stop_reason { 586 IEEE80211_QUEUE_STOP_REASON_DRIVER, 587 IEEE80211_QUEUE_STOP_REASON_PS, 588 IEEE80211_QUEUE_STOP_REASON_CSA, 589 IEEE80211_QUEUE_STOP_REASON_AGGREGATION, 590 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 591 IEEE80211_QUEUE_STOP_REASON_PENDING, 592 }; 593 594 struct ieee80211_master_priv { 595 struct ieee80211_local *local; 596 }; 597 598 struct ieee80211_local { 599 /* embed the driver visible part. 600 * don't cast (use the static inlines below), but we keep 601 * it first anyway so they become a no-op */ 602 struct ieee80211_hw hw; 603 604 const struct ieee80211_ops *ops; 605 606 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES]; 607 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */ 608 spinlock_t queue_stop_reason_lock; 609 610 struct net_device *mdev; /* wmaster# - "master" 802.11 device */ 611 int open_count; 612 int monitors, cooked_mntrs; 613 /* number of interfaces with corresponding FIF_ flags */ 614 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss; 615 unsigned int filter_flags; /* FIF_* */ 616 struct iw_statistics wstats; 617 bool tim_in_locked_section; /* see ieee80211_beacon_get() */ 618 619 /* 620 * suspended is true if we finished all the suspend _and_ we have 621 * not yet come up from resume. This is to be used by mac80211 622 * to ensure driver sanity during suspend and mac80211's own 623 * sanity. It can eventually be used for WoW as well. 624 */ 625 bool suspended; 626 627 /* 628 * quiescing is true during the suspend process _only_ to 629 * ease timer cancelling etc. 630 */ 631 bool quiescing; 632 633 int tx_headroom; /* required headroom for hardware/radiotap */ 634 635 /* Tasklet and skb queue to process calls from IRQ mode. All frames 636 * added to skb_queue will be processed, but frames in 637 * skb_queue_unreliable may be dropped if the total length of these 638 * queues increases over the limit. */ 639 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128 640 struct tasklet_struct tasklet; 641 struct sk_buff_head skb_queue; 642 struct sk_buff_head skb_queue_unreliable; 643 644 /* Station data */ 645 /* 646 * The lock only protects the list, hash, timer and counter 647 * against manipulation, reads are done in RCU. Additionally, 648 * the lock protects each BSS's TIM bitmap. 649 */ 650 spinlock_t sta_lock; 651 unsigned long num_sta; 652 struct list_head sta_list; 653 struct sta_info *sta_hash[STA_HASH_SIZE]; 654 struct timer_list sta_cleanup; 655 656 struct sk_buff_head pending[IEEE80211_MAX_QUEUES]; 657 struct tasklet_struct tx_pending_tasklet; 658 659 /* 660 * This lock is used to prevent concurrent A-MPDU 661 * session start/stop processing, this thus also 662 * synchronises the ->ampdu_action() callback to 663 * drivers and limits it to one at a time. 664 */ 665 spinlock_t ampdu_lock; 666 667 /* number of interfaces with corresponding IFF_ flags */ 668 atomic_t iff_allmultis, iff_promiscs; 669 670 struct rate_control_ref *rate_ctrl; 671 672 struct crypto_blkcipher *wep_tx_tfm; 673 struct crypto_blkcipher *wep_rx_tfm; 674 u32 wep_iv; 675 676 /* see iface.c */ 677 struct list_head interfaces; 678 struct mutex iflist_mtx; 679 680 /* 681 * Key lock, protects sdata's key_list and sta_info's 682 * key pointers (write access, they're RCU.) 683 */ 684 spinlock_t key_lock; 685 686 687 /* Scanning and BSS list */ 688 struct mutex scan_mtx; 689 bool sw_scanning, hw_scanning; 690 struct cfg80211_ssid scan_ssid; 691 struct cfg80211_scan_request int_scan_req; 692 struct cfg80211_scan_request *scan_req; 693 struct ieee80211_channel *scan_channel; 694 const u8 *orig_ies; 695 int orig_ies_len; 696 int scan_channel_idx; 697 int scan_ies_len; 698 699 enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state; 700 struct delayed_work scan_work; 701 struct ieee80211_sub_if_data *scan_sdata; 702 enum nl80211_channel_type oper_channel_type; 703 struct ieee80211_channel *oper_channel, *csa_channel; 704 705 /* SNMP counters */ 706 /* dot11CountersTable */ 707 u32 dot11TransmittedFragmentCount; 708 u32 dot11MulticastTransmittedFrameCount; 709 u32 dot11FailedCount; 710 u32 dot11RetryCount; 711 u32 dot11MultipleRetryCount; 712 u32 dot11FrameDuplicateCount; 713 u32 dot11ReceivedFragmentCount; 714 u32 dot11MulticastReceivedFrameCount; 715 u32 dot11TransmittedFrameCount; 716 717 #ifdef CONFIG_MAC80211_LEDS 718 int tx_led_counter, rx_led_counter; 719 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led; 720 char tx_led_name[32], rx_led_name[32], 721 assoc_led_name[32], radio_led_name[32]; 722 #endif 723 724 #ifdef CONFIG_MAC80211_DEBUGFS 725 struct work_struct sta_debugfs_add; 726 #endif 727 728 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 729 /* TX/RX handler statistics */ 730 unsigned int tx_handlers_drop; 731 unsigned int tx_handlers_queued; 732 unsigned int tx_handlers_drop_unencrypted; 733 unsigned int tx_handlers_drop_fragment; 734 unsigned int tx_handlers_drop_wep; 735 unsigned int tx_handlers_drop_not_assoc; 736 unsigned int tx_handlers_drop_unauth_port; 737 unsigned int rx_handlers_drop; 738 unsigned int rx_handlers_queued; 739 unsigned int rx_handlers_drop_nullfunc; 740 unsigned int rx_handlers_drop_defrag; 741 unsigned int rx_handlers_drop_short; 742 unsigned int rx_handlers_drop_passive_scan; 743 unsigned int tx_expand_skb_head; 744 unsigned int tx_expand_skb_head_cloned; 745 unsigned int rx_expand_skb_head; 746 unsigned int rx_expand_skb_head2; 747 unsigned int rx_handlers_fragments; 748 unsigned int tx_status_drop; 749 #define I802_DEBUG_INC(c) (c)++ 750 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */ 751 #define I802_DEBUG_INC(c) do { } while (0) 752 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */ 753 754 755 int total_ps_buffered; /* total number of all buffered unicast and 756 * multicast packets for power saving stations 757 */ 758 int wifi_wme_noack_test; 759 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */ 760 761 bool pspolling; 762 /* 763 * PS can only be enabled when we have exactly one managed 764 * interface (and monitors) in PS, this then points there. 765 */ 766 struct ieee80211_sub_if_data *ps_sdata; 767 struct work_struct dynamic_ps_enable_work; 768 struct work_struct dynamic_ps_disable_work; 769 struct timer_list dynamic_ps_timer; 770 struct notifier_block network_latency_notifier; 771 772 int user_power_level; /* in dBm */ 773 int power_constr_level; /* in dBm */ 774 775 struct work_struct restart_work; 776 777 #ifdef CONFIG_MAC80211_DEBUGFS 778 struct local_debugfsdentries { 779 struct dentry *rcdir; 780 struct dentry *rcname; 781 struct dentry *frequency; 782 struct dentry *total_ps_buffered; 783 struct dentry *wep_iv; 784 struct dentry *tsf; 785 struct dentry *reset; 786 struct dentry *noack; 787 struct dentry *statistics; 788 struct local_debugfsdentries_statsdentries { 789 struct dentry *transmitted_fragment_count; 790 struct dentry *multicast_transmitted_frame_count; 791 struct dentry *failed_count; 792 struct dentry *retry_count; 793 struct dentry *multiple_retry_count; 794 struct dentry *frame_duplicate_count; 795 struct dentry *received_fragment_count; 796 struct dentry *multicast_received_frame_count; 797 struct dentry *transmitted_frame_count; 798 struct dentry *wep_undecryptable_count; 799 struct dentry *num_scans; 800 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 801 struct dentry *tx_handlers_drop; 802 struct dentry *tx_handlers_queued; 803 struct dentry *tx_handlers_drop_unencrypted; 804 struct dentry *tx_handlers_drop_fragment; 805 struct dentry *tx_handlers_drop_wep; 806 struct dentry *tx_handlers_drop_not_assoc; 807 struct dentry *tx_handlers_drop_unauth_port; 808 struct dentry *rx_handlers_drop; 809 struct dentry *rx_handlers_queued; 810 struct dentry *rx_handlers_drop_nullfunc; 811 struct dentry *rx_handlers_drop_defrag; 812 struct dentry *rx_handlers_drop_short; 813 struct dentry *rx_handlers_drop_passive_scan; 814 struct dentry *tx_expand_skb_head; 815 struct dentry *tx_expand_skb_head_cloned; 816 struct dentry *rx_expand_skb_head; 817 struct dentry *rx_expand_skb_head2; 818 struct dentry *rx_handlers_fragments; 819 struct dentry *tx_status_drop; 820 #endif 821 struct dentry *dot11ACKFailureCount; 822 struct dentry *dot11RTSFailureCount; 823 struct dentry *dot11FCSErrorCount; 824 struct dentry *dot11RTSSuccessCount; 825 } stats; 826 struct dentry *stations; 827 struct dentry *keys; 828 } debugfs; 829 #endif 830 }; 831 832 static inline struct ieee80211_sub_if_data * 833 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev) 834 { 835 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 836 837 BUG_ON(!local || local->mdev == dev); 838 839 return netdev_priv(dev); 840 } 841 842 /* this struct represents 802.11n's RA/TID combination */ 843 struct ieee80211_ra_tid { 844 u8 ra[ETH_ALEN]; 845 u16 tid; 846 }; 847 848 /* Parsed Information Elements */ 849 struct ieee802_11_elems { 850 u8 *ie_start; 851 size_t total_len; 852 853 /* pointers to IEs */ 854 u8 *ssid; 855 u8 *supp_rates; 856 u8 *fh_params; 857 u8 *ds_params; 858 u8 *cf_params; 859 struct ieee80211_tim_ie *tim; 860 u8 *ibss_params; 861 u8 *challenge; 862 u8 *wpa; 863 u8 *rsn; 864 u8 *erp_info; 865 u8 *ext_supp_rates; 866 u8 *wmm_info; 867 u8 *wmm_param; 868 struct ieee80211_ht_cap *ht_cap_elem; 869 struct ieee80211_ht_info *ht_info_elem; 870 u8 *mesh_config; 871 u8 *mesh_id; 872 u8 *peer_link; 873 u8 *preq; 874 u8 *prep; 875 u8 *perr; 876 u8 *ch_switch_elem; 877 u8 *country_elem; 878 u8 *pwr_constr_elem; 879 u8 *quiet_elem; /* first quite element */ 880 u8 *timeout_int; 881 882 /* length of them, respectively */ 883 u8 ssid_len; 884 u8 supp_rates_len; 885 u8 fh_params_len; 886 u8 ds_params_len; 887 u8 cf_params_len; 888 u8 tim_len; 889 u8 ibss_params_len; 890 u8 challenge_len; 891 u8 wpa_len; 892 u8 rsn_len; 893 u8 erp_info_len; 894 u8 ext_supp_rates_len; 895 u8 wmm_info_len; 896 u8 wmm_param_len; 897 u8 mesh_config_len; 898 u8 mesh_id_len; 899 u8 peer_link_len; 900 u8 preq_len; 901 u8 prep_len; 902 u8 perr_len; 903 u8 ch_switch_elem_len; 904 u8 country_elem_len; 905 u8 pwr_constr_elem_len; 906 u8 quiet_elem_len; 907 u8 num_of_quiet_elem; /* can be more the one */ 908 u8 timeout_int_len; 909 }; 910 911 static inline struct ieee80211_local *hw_to_local( 912 struct ieee80211_hw *hw) 913 { 914 return container_of(hw, struct ieee80211_local, hw); 915 } 916 917 static inline struct ieee80211_hw *local_to_hw( 918 struct ieee80211_local *local) 919 { 920 return &local->hw; 921 } 922 923 924 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr) 925 { 926 return compare_ether_addr(raddr, addr) == 0 || 927 is_broadcast_ether_addr(raddr); 928 } 929 930 931 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed); 932 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx); 933 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 934 u32 changed); 935 void ieee80211_configure_filter(struct ieee80211_local *local); 936 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata); 937 938 /* wireless extensions */ 939 extern const struct iw_handler_def ieee80211_iw_handler_def; 940 941 /* STA code */ 942 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata); 943 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, 944 struct sk_buff *skb, 945 struct ieee80211_rx_status *rx_status); 946 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata); 947 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len); 948 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len); 949 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid); 950 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata); 951 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason); 952 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason); 953 void ieee80211_send_pspoll(struct ieee80211_local *local, 954 struct ieee80211_sub_if_data *sdata); 955 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency); 956 int ieee80211_max_network_latency(struct notifier_block *nb, 957 unsigned long data, void *dummy); 958 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 959 struct ieee80211_channel_sw_ie *sw_elem, 960 struct ieee80211_bss *bss); 961 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata); 962 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata); 963 964 /* IBSS code */ 965 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local); 966 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata); 967 ieee80211_rx_result 968 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, 969 struct ieee80211_rx_status *rx_status); 970 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, 971 u8 *bssid, u8 *addr, u32 supp_rates); 972 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 973 struct cfg80211_ibss_params *params); 974 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata); 975 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata); 976 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata); 977 978 /* scan/BSS handling */ 979 void ieee80211_scan_work(struct work_struct *work); 980 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata, 981 const u8 *ssid, u8 ssid_len); 982 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, 983 struct cfg80211_scan_request *req); 984 int ieee80211_scan_results(struct ieee80211_local *local, 985 struct iw_request_info *info, 986 char *buf, size_t len); 987 void ieee80211_scan_cancel(struct ieee80211_local *local); 988 ieee80211_rx_result 989 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, 990 struct sk_buff *skb, 991 struct ieee80211_rx_status *rx_status); 992 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, 993 const char *ie, size_t len); 994 995 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local); 996 struct ieee80211_bss * 997 ieee80211_bss_info_update(struct ieee80211_local *local, 998 struct ieee80211_rx_status *rx_status, 999 struct ieee80211_mgmt *mgmt, 1000 size_t len, 1001 struct ieee802_11_elems *elems, 1002 struct ieee80211_channel *channel, 1003 bool beacon); 1004 struct ieee80211_bss * 1005 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, 1006 u8 *ssid, u8 ssid_len); 1007 void ieee80211_rx_bss_put(struct ieee80211_local *local, 1008 struct ieee80211_bss *bss); 1009 void ieee80211_rx_bss_remove(struct ieee80211_sub_if_data *sdata, u8 *bssid, 1010 int freq, u8 *ssid, u8 ssid_len); 1011 1012 /* interface handling */ 1013 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1014 struct net_device **new_dev, enum nl80211_iftype type, 1015 struct vif_params *params); 1016 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1017 enum nl80211_iftype type); 1018 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata); 1019 void ieee80211_remove_interfaces(struct ieee80211_local *local); 1020 u32 __ieee80211_recalc_idle(struct ieee80211_local *local); 1021 void ieee80211_recalc_idle(struct ieee80211_local *local); 1022 1023 /* tx handling */ 1024 void ieee80211_clear_tx_pending(struct ieee80211_local *local); 1025 void ieee80211_tx_pending(unsigned long data); 1026 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev); 1027 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev); 1028 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev); 1029 1030 /* HT */ 1031 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband, 1032 struct ieee80211_ht_cap *ht_cap_ie, 1033 struct ieee80211_sta_ht_cap *ht_cap); 1034 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn); 1035 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, 1036 const u8 *da, u16 tid, 1037 u16 initiator, u16 reason_code); 1038 1039 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da, 1040 u16 tid, u16 initiator, u16 reason); 1041 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, 1042 u16 initiator, u16 reason); 1043 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta); 1044 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, 1045 struct sta_info *sta, 1046 struct ieee80211_mgmt *mgmt, size_t len); 1047 void ieee80211_process_addba_resp(struct ieee80211_local *local, 1048 struct sta_info *sta, 1049 struct ieee80211_mgmt *mgmt, 1050 size_t len); 1051 void ieee80211_process_addba_request(struct ieee80211_local *local, 1052 struct sta_info *sta, 1053 struct ieee80211_mgmt *mgmt, 1054 size_t len); 1055 1056 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, 1057 enum ieee80211_back_parties initiator); 1058 1059 /* Spectrum management */ 1060 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata, 1061 struct ieee80211_mgmt *mgmt, 1062 size_t len); 1063 1064 /* Suspend/resume and hw reconfiguration */ 1065 int ieee80211_reconfig(struct ieee80211_local *local); 1066 1067 #ifdef CONFIG_PM 1068 int __ieee80211_suspend(struct ieee80211_hw *hw); 1069 1070 static inline int __ieee80211_resume(struct ieee80211_hw *hw) 1071 { 1072 return ieee80211_reconfig(hw_to_local(hw)); 1073 } 1074 #else 1075 static inline int __ieee80211_suspend(struct ieee80211_hw *hw) 1076 { 1077 return 0; 1078 } 1079 1080 static inline int __ieee80211_resume(struct ieee80211_hw *hw) 1081 { 1082 return 0; 1083 } 1084 #endif 1085 1086 /* utility functions/constants */ 1087 extern void *mac80211_wiphy_privid; /* for wiphy privid */ 1088 extern const unsigned char rfc1042_header[6]; 1089 extern const unsigned char bridge_tunnel_header[6]; 1090 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, 1091 enum nl80211_iftype type); 1092 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, 1093 int rate, int erp, int short_preamble); 1094 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx, 1095 struct ieee80211_hdr *hdr, const u8 *tsc); 1096 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata); 1097 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, 1098 int encrypt); 1099 void ieee802_11_parse_elems(u8 *start, size_t len, 1100 struct ieee802_11_elems *elems); 1101 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, 1102 struct ieee802_11_elems *elems, 1103 u64 filter, u32 crc); 1104 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq); 1105 u32 ieee80211_mandatory_rates(struct ieee80211_local *local, 1106 enum ieee80211_band band); 1107 1108 void ieee80211_dynamic_ps_enable_work(struct work_struct *work); 1109 void ieee80211_dynamic_ps_disable_work(struct work_struct *work); 1110 void ieee80211_dynamic_ps_timer(unsigned long data); 1111 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1112 struct ieee80211_sub_if_data *sdata, 1113 int powersave); 1114 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 1115 struct ieee80211_hdr *hdr); 1116 void ieee80211_beacon_loss_work(struct work_struct *work); 1117 1118 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 1119 enum queue_stop_reason reason); 1120 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 1121 enum queue_stop_reason reason); 1122 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 1123 enum queue_stop_reason reason); 1124 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 1125 enum queue_stop_reason reason); 1126 1127 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1128 u16 transaction, u16 auth_alg, 1129 u8 *extra, size_t extra_len, 1130 const u8 *bssid, int encrypt); 1131 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1132 const u8 *ie, size_t ie_len); 1133 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, 1134 const u8 *ssid, size_t ssid_len, 1135 const u8 *ie, size_t ie_len); 1136 1137 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, 1138 const size_t supp_rates_len, 1139 const u8 *supp_rates); 1140 u32 ieee80211_sta_get_rates(struct ieee80211_local *local, 1141 struct ieee802_11_elems *elems, 1142 enum ieee80211_band band); 1143 1144 #ifdef CONFIG_MAC80211_NOINLINE 1145 #define debug_noinline noinline 1146 #else 1147 #define debug_noinline 1148 #endif 1149 1150 #endif /* IEEE80211_I_H */ 1151