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/ieee80211_radiotap.h> 27 #include <net/cfg80211.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_FRAGMENTED BIT(3) 167 /* only add flags here that do not change with subframes of an aMPDU */ 168 169 struct ieee80211_rx_data { 170 struct sk_buff *skb; 171 struct ieee80211_local *local; 172 struct ieee80211_sub_if_data *sdata; 173 struct sta_info *sta; 174 struct ieee80211_key *key; 175 176 unsigned int flags; 177 int queue; 178 u32 tkip_iv32; 179 u16 tkip_iv16; 180 }; 181 182 struct beacon_data { 183 u8 *head, *tail; 184 int head_len, tail_len; 185 int dtim_period; 186 }; 187 188 struct ieee80211_if_ap { 189 struct beacon_data *beacon; 190 191 struct list_head vlans; 192 193 /* yes, this looks ugly, but guarantees that we can later use 194 * bitmap_empty :) 195 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */ 196 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]; 197 struct sk_buff_head ps_bc_buf; 198 atomic_t num_sta_ps; /* number of stations in PS mode */ 199 int dtim_count; 200 }; 201 202 struct ieee80211_if_wds { 203 struct sta_info *sta; 204 u8 remote_addr[ETH_ALEN]; 205 }; 206 207 struct ieee80211_if_vlan { 208 struct list_head list; 209 210 /* used for all tx if the VLAN is configured to 4-addr mode */ 211 struct sta_info *sta; 212 }; 213 214 struct mesh_stats { 215 __u32 fwded_mcast; /* Mesh forwarded multicast frames */ 216 __u32 fwded_unicast; /* Mesh forwarded unicast frames */ 217 __u32 fwded_frames; /* Mesh total forwarded frames */ 218 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/ 219 __u32 dropped_frames_no_route; /* Not transmitted, no route found */ 220 atomic_t estab_plinks; 221 }; 222 223 #define PREQ_Q_F_START 0x1 224 #define PREQ_Q_F_REFRESH 0x2 225 struct mesh_preq_queue { 226 struct list_head list; 227 u8 dst[ETH_ALEN]; 228 u8 flags; 229 }; 230 231 enum ieee80211_mgd_state { 232 IEEE80211_MGD_STATE_IDLE, 233 IEEE80211_MGD_STATE_PROBE, 234 IEEE80211_MGD_STATE_AUTH, 235 IEEE80211_MGD_STATE_ASSOC, 236 }; 237 238 struct ieee80211_mgd_work { 239 struct list_head list; 240 struct ieee80211_bss *bss; 241 int ie_len; 242 u8 prev_bssid[ETH_ALEN]; 243 u8 ssid[IEEE80211_MAX_SSID_LEN]; 244 u8 ssid_len; 245 unsigned long timeout; 246 enum ieee80211_mgd_state state; 247 u16 auth_alg, auth_transaction; 248 249 int tries; 250 251 u8 key[WLAN_KEY_LEN_WEP104]; 252 u8 key_len, key_idx; 253 254 /* must be last */ 255 u8 ie[0]; /* for auth or assoc frame, not probe */ 256 }; 257 258 /* flags used in struct ieee80211_if_managed.flags */ 259 enum ieee80211_sta_flags { 260 IEEE80211_STA_BEACON_POLL = BIT(0), 261 IEEE80211_STA_CONNECTION_POLL = BIT(1), 262 IEEE80211_STA_CONTROL_PORT = BIT(2), 263 IEEE80211_STA_WMM_ENABLED = BIT(3), 264 IEEE80211_STA_DISABLE_11N = BIT(4), 265 IEEE80211_STA_CSA_RECEIVED = BIT(5), 266 IEEE80211_STA_MFP_ENABLED = BIT(6), 267 }; 268 269 /* flags for MLME request */ 270 enum ieee80211_sta_request { 271 IEEE80211_STA_REQ_SCAN, 272 }; 273 274 struct ieee80211_if_managed { 275 struct timer_list timer; 276 struct timer_list conn_mon_timer; 277 struct timer_list bcn_mon_timer; 278 struct timer_list chswitch_timer; 279 struct work_struct work; 280 struct work_struct monitor_work; 281 struct work_struct chswitch_work; 282 struct work_struct beacon_loss_work; 283 284 unsigned long probe_timeout; 285 int probe_send_count; 286 287 struct mutex mtx; 288 struct ieee80211_bss *associated; 289 struct ieee80211_mgd_work *old_associate_work; 290 struct list_head work_list; 291 292 u8 bssid[ETH_ALEN]; 293 294 u16 aid; 295 u16 capab; 296 297 struct sk_buff_head skb_queue; 298 299 unsigned long timers_running; /* used for quiesce/restart */ 300 bool powersave; /* powersave requested for this iface */ 301 302 unsigned long request; 303 304 unsigned int flags; 305 306 u32 beacon_crc; 307 308 enum { 309 IEEE80211_MFP_DISABLED, 310 IEEE80211_MFP_OPTIONAL, 311 IEEE80211_MFP_REQUIRED 312 } mfp; /* management frame protection */ 313 314 int wmm_last_param_set; 315 316 u8 use_4addr; 317 }; 318 319 enum ieee80211_ibss_request { 320 IEEE80211_IBSS_REQ_RUN = 0, 321 }; 322 323 struct ieee80211_if_ibss { 324 struct timer_list timer; 325 struct work_struct work; 326 327 struct sk_buff_head skb_queue; 328 329 unsigned long request; 330 unsigned long last_scan_completed; 331 332 bool timer_running; 333 334 bool fixed_bssid; 335 bool fixed_channel; 336 bool privacy; 337 338 u8 bssid[ETH_ALEN]; 339 u8 ssid[IEEE80211_MAX_SSID_LEN]; 340 u8 ssid_len, ie_len; 341 u8 *ie; 342 struct ieee80211_channel *channel; 343 344 unsigned long ibss_join_req; 345 /* probe response/beacon for IBSS */ 346 struct sk_buff *presp, *skb; 347 348 enum { 349 IEEE80211_IBSS_MLME_SEARCH, 350 IEEE80211_IBSS_MLME_JOINED, 351 } state; 352 }; 353 354 struct ieee80211_if_mesh { 355 struct work_struct work; 356 struct timer_list housekeeping_timer; 357 struct timer_list mesh_path_timer; 358 struct timer_list mesh_path_root_timer; 359 struct sk_buff_head skb_queue; 360 361 unsigned long timers_running; 362 363 unsigned long wrkq_flags; 364 365 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN]; 366 size_t mesh_id_len; 367 /* Active Path Selection Protocol Identifier */ 368 u8 mesh_pp_id; 369 /* Active Path Selection Metric Identifier */ 370 u8 mesh_pm_id; 371 /* Congestion Control Mode Identifier */ 372 u8 mesh_cc_id; 373 /* Synchronization Protocol Identifier */ 374 u8 mesh_sp_id; 375 /* Authentication Protocol Identifier */ 376 u8 mesh_auth_id; 377 /* Local mesh Sequence Number */ 378 u32 sn; 379 /* Last used PREQ ID */ 380 u32 preq_id; 381 atomic_t mpaths; 382 /* Timestamp of last SN update */ 383 unsigned long last_sn_update; 384 /* Timestamp of last SN 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 { 478 struct dentry *dir; 479 struct dentry *default_key; 480 struct dentry *default_mgmt_key; 481 } debugfs; 482 #endif 483 /* must be last, dynamically sized area in this! */ 484 struct ieee80211_vif vif; 485 }; 486 487 static inline 488 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p) 489 { 490 return container_of(p, struct ieee80211_sub_if_data, vif); 491 } 492 493 static inline void 494 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata, 495 u8 mesh_id_len, u8 *mesh_id) 496 { 497 #ifdef CONFIG_MAC80211_MESH 498 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 499 ifmsh->mesh_id_len = mesh_id_len; 500 memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len); 501 #else 502 WARN_ON(1); 503 #endif 504 } 505 506 enum { 507 IEEE80211_RX_MSG = 1, 508 IEEE80211_TX_STATUS_MSG = 2, 509 IEEE80211_DELBA_MSG = 3, 510 IEEE80211_ADDBA_MSG = 4, 511 }; 512 513 enum queue_stop_reason { 514 IEEE80211_QUEUE_STOP_REASON_DRIVER, 515 IEEE80211_QUEUE_STOP_REASON_PS, 516 IEEE80211_QUEUE_STOP_REASON_CSA, 517 IEEE80211_QUEUE_STOP_REASON_AGGREGATION, 518 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 519 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 520 }; 521 522 /** 523 * mac80211 scan flags - currently active scan mode 524 * 525 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as 526 * well be on the operating channel 527 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to 528 * determine if we are on the operating channel or not 529 * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning, 530 * gets only set in conjunction with SCAN_SW_SCANNING 531 */ 532 enum { 533 SCAN_SW_SCANNING, 534 SCAN_HW_SCANNING, 535 SCAN_OFF_CHANNEL, 536 }; 537 538 /** 539 * enum mac80211_scan_state - scan state machine states 540 * 541 * @SCAN_DECISION: Main entry point to the scan state machine, this state 542 * determines if we should keep on scanning or switch back to the 543 * operating channel 544 * @SCAN_SET_CHANNEL: Set the next channel to be scanned 545 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses 546 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP 547 * about us leaving the channel and stop all associated STA interfaces 548 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the 549 * AP about us being back and restart all associated STA interfaces 550 */ 551 enum mac80211_scan_state { 552 SCAN_DECISION, 553 SCAN_SET_CHANNEL, 554 SCAN_SEND_PROBE, 555 SCAN_LEAVE_OPER_CHANNEL, 556 SCAN_ENTER_OPER_CHANNEL, 557 }; 558 559 struct ieee80211_local { 560 /* embed the driver visible part. 561 * don't cast (use the static inlines below), but we keep 562 * it first anyway so they become a no-op */ 563 struct ieee80211_hw hw; 564 565 const struct ieee80211_ops *ops; 566 567 /* 568 * private workqueue to mac80211. mac80211 makes this accessible 569 * via ieee80211_queue_work() 570 */ 571 struct workqueue_struct *workqueue; 572 573 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES]; 574 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */ 575 spinlock_t queue_stop_reason_lock; 576 577 int open_count; 578 int monitors, cooked_mntrs; 579 /* number of interfaces with corresponding FIF_ flags */ 580 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll; 581 unsigned int filter_flags; /* FIF_* */ 582 583 /* protects the aggregated multicast list and filter calls */ 584 spinlock_t filter_lock; 585 586 /* used for uploading changed mc list */ 587 struct work_struct reconfig_filter; 588 589 /* aggregated multicast list */ 590 struct dev_addr_list *mc_list; 591 int mc_count; 592 593 bool tim_in_locked_section; /* see ieee80211_beacon_get() */ 594 595 /* 596 * suspended is true if we finished all the suspend _and_ we have 597 * not yet come up from resume. This is to be used by mac80211 598 * to ensure driver sanity during suspend and mac80211's own 599 * sanity. It can eventually be used for WoW as well. 600 */ 601 bool suspended; 602 603 /* 604 * Resuming is true while suspended, but when we're reprogramming the 605 * hardware -- at that time it's allowed to use ieee80211_queue_work() 606 * again even though some other parts of the stack are still suspended 607 * and we still drop received frames to avoid waking the stack. 608 */ 609 bool resuming; 610 611 /* 612 * quiescing is true during the suspend process _only_ to 613 * ease timer cancelling etc. 614 */ 615 bool quiescing; 616 617 /* device is started */ 618 bool started; 619 620 int tx_headroom; /* required headroom for hardware/radiotap */ 621 622 /* Tasklet and skb queue to process calls from IRQ mode. All frames 623 * added to skb_queue will be processed, but frames in 624 * skb_queue_unreliable may be dropped if the total length of these 625 * queues increases over the limit. */ 626 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128 627 struct tasklet_struct tasklet; 628 struct sk_buff_head skb_queue; 629 struct sk_buff_head skb_queue_unreliable; 630 631 /* Station data */ 632 /* 633 * The lock only protects the list, hash, timer and counter 634 * against manipulation, reads are done in RCU. Additionally, 635 * the lock protects each BSS's TIM bitmap. 636 */ 637 spinlock_t sta_lock; 638 unsigned long num_sta; 639 struct list_head sta_list; 640 struct sta_info *sta_hash[STA_HASH_SIZE]; 641 struct timer_list sta_cleanup; 642 int sta_generation; 643 644 struct sk_buff_head pending[IEEE80211_MAX_QUEUES]; 645 struct tasklet_struct tx_pending_tasklet; 646 647 /* 648 * This lock is used to prevent concurrent A-MPDU 649 * session start/stop processing, this thus also 650 * synchronises the ->ampdu_action() callback to 651 * drivers and limits it to one at a time. 652 */ 653 spinlock_t ampdu_lock; 654 655 /* number of interfaces with corresponding IFF_ flags */ 656 atomic_t iff_allmultis, iff_promiscs; 657 658 struct rate_control_ref *rate_ctrl; 659 660 struct crypto_blkcipher *wep_tx_tfm; 661 struct crypto_blkcipher *wep_rx_tfm; 662 u32 wep_iv; 663 664 /* see iface.c */ 665 struct list_head interfaces; 666 struct mutex iflist_mtx; 667 668 /* 669 * Key lock, protects sdata's key_list and sta_info's 670 * key pointers (write access, they're RCU.) 671 */ 672 spinlock_t key_lock; 673 674 675 /* Scanning and BSS list */ 676 struct mutex scan_mtx; 677 unsigned long scanning; 678 struct cfg80211_ssid scan_ssid; 679 struct cfg80211_scan_request *int_scan_req; 680 struct cfg80211_scan_request *scan_req, *hw_scan_req; 681 struct ieee80211_channel *scan_channel; 682 enum ieee80211_band hw_scan_band; 683 int scan_channel_idx; 684 int scan_ies_len; 685 686 enum mac80211_scan_state next_scan_state; 687 struct delayed_work scan_work; 688 struct ieee80211_sub_if_data *scan_sdata; 689 enum nl80211_channel_type oper_channel_type; 690 struct ieee80211_channel *oper_channel, *csa_channel; 691 692 /* SNMP counters */ 693 /* dot11CountersTable */ 694 u32 dot11TransmittedFragmentCount; 695 u32 dot11MulticastTransmittedFrameCount; 696 u32 dot11FailedCount; 697 u32 dot11RetryCount; 698 u32 dot11MultipleRetryCount; 699 u32 dot11FrameDuplicateCount; 700 u32 dot11ReceivedFragmentCount; 701 u32 dot11MulticastReceivedFrameCount; 702 u32 dot11TransmittedFrameCount; 703 704 #ifdef CONFIG_MAC80211_LEDS 705 int tx_led_counter, rx_led_counter; 706 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led; 707 char tx_led_name[32], rx_led_name[32], 708 assoc_led_name[32], radio_led_name[32]; 709 #endif 710 711 #ifdef CONFIG_MAC80211_DEBUGFS 712 struct work_struct sta_debugfs_add; 713 #endif 714 715 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 716 /* TX/RX handler statistics */ 717 unsigned int tx_handlers_drop; 718 unsigned int tx_handlers_queued; 719 unsigned int tx_handlers_drop_unencrypted; 720 unsigned int tx_handlers_drop_fragment; 721 unsigned int tx_handlers_drop_wep; 722 unsigned int tx_handlers_drop_not_assoc; 723 unsigned int tx_handlers_drop_unauth_port; 724 unsigned int rx_handlers_drop; 725 unsigned int rx_handlers_queued; 726 unsigned int rx_handlers_drop_nullfunc; 727 unsigned int rx_handlers_drop_defrag; 728 unsigned int rx_handlers_drop_short; 729 unsigned int rx_handlers_drop_passive_scan; 730 unsigned int tx_expand_skb_head; 731 unsigned int tx_expand_skb_head_cloned; 732 unsigned int rx_expand_skb_head; 733 unsigned int rx_expand_skb_head2; 734 unsigned int rx_handlers_fragments; 735 unsigned int tx_status_drop; 736 #define I802_DEBUG_INC(c) (c)++ 737 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */ 738 #define I802_DEBUG_INC(c) do { } while (0) 739 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */ 740 741 742 int total_ps_buffered; /* total number of all buffered unicast and 743 * multicast packets for power saving stations 744 */ 745 int wifi_wme_noack_test; 746 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */ 747 748 bool pspolling; 749 bool scan_ps_enabled; 750 /* 751 * PS can only be enabled when we have exactly one managed 752 * interface (and monitors) in PS, this then points there. 753 */ 754 struct ieee80211_sub_if_data *ps_sdata; 755 struct work_struct dynamic_ps_enable_work; 756 struct work_struct dynamic_ps_disable_work; 757 struct timer_list dynamic_ps_timer; 758 struct notifier_block network_latency_notifier; 759 760 int user_power_level; /* in dBm */ 761 int power_constr_level; /* in dBm */ 762 763 struct work_struct restart_work; 764 765 #ifdef CONFIG_MAC80211_DEBUGFS 766 struct local_debugfsdentries { 767 struct dentry *rcdir; 768 struct dentry *stations; 769 struct dentry *keys; 770 } debugfs; 771 #endif 772 }; 773 774 static inline struct ieee80211_sub_if_data * 775 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev) 776 { 777 return netdev_priv(dev); 778 } 779 780 /* this struct represents 802.11n's RA/TID combination along with our vif */ 781 struct ieee80211_ra_tid { 782 struct ieee80211_vif *vif; 783 u8 ra[ETH_ALEN]; 784 u16 tid; 785 }; 786 787 /* Parsed Information Elements */ 788 struct ieee802_11_elems { 789 u8 *ie_start; 790 size_t total_len; 791 792 /* pointers to IEs */ 793 u8 *ssid; 794 u8 *supp_rates; 795 u8 *fh_params; 796 u8 *ds_params; 797 u8 *cf_params; 798 struct ieee80211_tim_ie *tim; 799 u8 *ibss_params; 800 u8 *challenge; 801 u8 *wpa; 802 u8 *rsn; 803 u8 *erp_info; 804 u8 *ext_supp_rates; 805 u8 *wmm_info; 806 u8 *wmm_param; 807 struct ieee80211_ht_cap *ht_cap_elem; 808 struct ieee80211_ht_info *ht_info_elem; 809 struct ieee80211_meshconf_ie *mesh_config; 810 u8 *mesh_id; 811 u8 *peer_link; 812 u8 *preq; 813 u8 *prep; 814 u8 *perr; 815 struct ieee80211_rann_ie *rann; 816 u8 *ch_switch_elem; 817 u8 *country_elem; 818 u8 *pwr_constr_elem; 819 u8 *quiet_elem; /* first quite element */ 820 u8 *timeout_int; 821 822 /* length of them, respectively */ 823 u8 ssid_len; 824 u8 supp_rates_len; 825 u8 fh_params_len; 826 u8 ds_params_len; 827 u8 cf_params_len; 828 u8 tim_len; 829 u8 ibss_params_len; 830 u8 challenge_len; 831 u8 wpa_len; 832 u8 rsn_len; 833 u8 erp_info_len; 834 u8 ext_supp_rates_len; 835 u8 wmm_info_len; 836 u8 wmm_param_len; 837 u8 mesh_id_len; 838 u8 peer_link_len; 839 u8 preq_len; 840 u8 prep_len; 841 u8 perr_len; 842 u8 ch_switch_elem_len; 843 u8 country_elem_len; 844 u8 pwr_constr_elem_len; 845 u8 quiet_elem_len; 846 u8 num_of_quiet_elem; /* can be more the one */ 847 u8 timeout_int_len; 848 }; 849 850 static inline struct ieee80211_local *hw_to_local( 851 struct ieee80211_hw *hw) 852 { 853 return container_of(hw, struct ieee80211_local, hw); 854 } 855 856 static inline struct ieee80211_hw *local_to_hw( 857 struct ieee80211_local *local) 858 { 859 return &local->hw; 860 } 861 862 863 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr) 864 { 865 return compare_ether_addr(raddr, addr) == 0 || 866 is_broadcast_ether_addr(raddr); 867 } 868 869 870 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed); 871 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx); 872 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 873 u32 changed); 874 void ieee80211_configure_filter(struct ieee80211_local *local); 875 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata); 876 877 /* STA code */ 878 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata); 879 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 880 struct cfg80211_auth_request *req); 881 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 882 struct cfg80211_assoc_request *req); 883 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 884 struct cfg80211_deauth_request *req, 885 void *cookie); 886 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 887 struct cfg80211_disassoc_request *req, 888 void *cookie); 889 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, 890 struct sk_buff *skb); 891 void ieee80211_send_pspoll(struct ieee80211_local *local, 892 struct ieee80211_sub_if_data *sdata); 893 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency); 894 int ieee80211_max_network_latency(struct notifier_block *nb, 895 unsigned long data, void *dummy); 896 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 897 struct ieee80211_channel_sw_ie *sw_elem, 898 struct ieee80211_bss *bss); 899 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata); 900 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata); 901 902 /* IBSS code */ 903 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local); 904 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata); 905 ieee80211_rx_result 906 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); 907 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, 908 u8 *bssid, u8 *addr, u32 supp_rates); 909 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 910 struct cfg80211_ibss_params *params); 911 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata); 912 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata); 913 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata); 914 915 /* scan/BSS handling */ 916 void ieee80211_scan_work(struct work_struct *work); 917 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata, 918 const u8 *ssid, u8 ssid_len); 919 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, 920 struct cfg80211_scan_request *req); 921 void ieee80211_scan_cancel(struct ieee80211_local *local); 922 ieee80211_rx_result 923 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); 924 925 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local); 926 struct ieee80211_bss * 927 ieee80211_bss_info_update(struct ieee80211_local *local, 928 struct ieee80211_rx_status *rx_status, 929 struct ieee80211_mgmt *mgmt, 930 size_t len, 931 struct ieee802_11_elems *elems, 932 struct ieee80211_channel *channel, 933 bool beacon); 934 struct ieee80211_bss * 935 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, 936 u8 *ssid, u8 ssid_len); 937 void ieee80211_rx_bss_put(struct ieee80211_local *local, 938 struct ieee80211_bss *bss); 939 940 /* interface handling */ 941 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 942 struct net_device **new_dev, enum nl80211_iftype type, 943 struct vif_params *params); 944 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 945 enum nl80211_iftype type); 946 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata); 947 void ieee80211_remove_interfaces(struct ieee80211_local *local); 948 u32 __ieee80211_recalc_idle(struct ieee80211_local *local); 949 void ieee80211_recalc_idle(struct ieee80211_local *local); 950 951 /* tx handling */ 952 void ieee80211_clear_tx_pending(struct ieee80211_local *local); 953 void ieee80211_tx_pending(unsigned long data); 954 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, 955 struct net_device *dev); 956 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, 957 struct net_device *dev); 958 959 /* 960 * radiotap header for status frames 961 */ 962 struct ieee80211_tx_status_rtap_hdr { 963 struct ieee80211_radiotap_header hdr; 964 u8 rate; 965 u8 padding_for_rate; 966 __le16 tx_flags; 967 u8 data_retries; 968 } __attribute__ ((packed)); 969 970 971 /* HT */ 972 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband, 973 struct ieee80211_ht_cap *ht_cap_ie, 974 struct ieee80211_sta_ht_cap *ht_cap); 975 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn); 976 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, 977 const u8 *da, u16 tid, 978 u16 initiator, u16 reason_code); 979 980 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da, 981 u16 tid, u16 initiator, u16 reason); 982 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, 983 u16 initiator, u16 reason); 984 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta); 985 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, 986 struct sta_info *sta, 987 struct ieee80211_mgmt *mgmt, size_t len); 988 void ieee80211_process_addba_resp(struct ieee80211_local *local, 989 struct sta_info *sta, 990 struct ieee80211_mgmt *mgmt, 991 size_t len); 992 void ieee80211_process_addba_request(struct ieee80211_local *local, 993 struct sta_info *sta, 994 struct ieee80211_mgmt *mgmt, 995 size_t len); 996 997 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, 998 enum ieee80211_back_parties initiator); 999 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, 1000 enum ieee80211_back_parties initiator); 1001 1002 /* Spectrum management */ 1003 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata, 1004 struct ieee80211_mgmt *mgmt, 1005 size_t len); 1006 1007 /* Suspend/resume and hw reconfiguration */ 1008 int ieee80211_reconfig(struct ieee80211_local *local); 1009 void ieee80211_stop_device(struct ieee80211_local *local); 1010 1011 #ifdef CONFIG_PM 1012 int __ieee80211_suspend(struct ieee80211_hw *hw); 1013 1014 static inline int __ieee80211_resume(struct ieee80211_hw *hw) 1015 { 1016 return ieee80211_reconfig(hw_to_local(hw)); 1017 } 1018 #else 1019 static inline int __ieee80211_suspend(struct ieee80211_hw *hw) 1020 { 1021 return 0; 1022 } 1023 1024 static inline int __ieee80211_resume(struct ieee80211_hw *hw) 1025 { 1026 return 0; 1027 } 1028 #endif 1029 1030 /* utility functions/constants */ 1031 extern void *mac80211_wiphy_privid; /* for wiphy privid */ 1032 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, 1033 enum nl80211_iftype type); 1034 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, 1035 int rate, int erp, int short_preamble); 1036 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx, 1037 struct ieee80211_hdr *hdr, const u8 *tsc, 1038 gfp_t gfp); 1039 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata); 1040 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); 1041 void ieee802_11_parse_elems(u8 *start, size_t len, 1042 struct ieee802_11_elems *elems); 1043 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, 1044 struct ieee802_11_elems *elems, 1045 u64 filter, u32 crc); 1046 u32 ieee80211_mandatory_rates(struct ieee80211_local *local, 1047 enum ieee80211_band band); 1048 1049 void ieee80211_dynamic_ps_enable_work(struct work_struct *work); 1050 void ieee80211_dynamic_ps_disable_work(struct work_struct *work); 1051 void ieee80211_dynamic_ps_timer(unsigned long data); 1052 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1053 struct ieee80211_sub_if_data *sdata, 1054 int powersave); 1055 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 1056 struct ieee80211_hdr *hdr); 1057 void ieee80211_beacon_loss_work(struct work_struct *work); 1058 1059 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 1060 enum queue_stop_reason reason); 1061 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 1062 enum queue_stop_reason reason); 1063 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 1064 enum queue_stop_reason reason); 1065 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 1066 enum queue_stop_reason reason); 1067 void ieee80211_add_pending_skb(struct ieee80211_local *local, 1068 struct sk_buff *skb); 1069 int ieee80211_add_pending_skbs(struct ieee80211_local *local, 1070 struct sk_buff_head *skbs); 1071 1072 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1073 u16 transaction, u16 auth_alg, 1074 u8 *extra, size_t extra_len, const u8 *bssid, 1075 const u8 *key, u8 key_len, u8 key_idx); 1076 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1077 const u8 *ie, size_t ie_len, 1078 enum ieee80211_band band); 1079 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, 1080 const u8 *ssid, size_t ssid_len, 1081 const u8 *ie, size_t ie_len); 1082 1083 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, 1084 const size_t supp_rates_len, 1085 const u8 *supp_rates); 1086 u32 ieee80211_sta_get_rates(struct ieee80211_local *local, 1087 struct ieee802_11_elems *elems, 1088 enum ieee80211_band band); 1089 1090 #ifdef CONFIG_MAC80211_NOINLINE 1091 #define debug_noinline noinline 1092 #else 1093 #define debug_noinline 1094 #endif 1095 1096 #endif /* IEEE80211_I_H */ 1097