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/mac80211.h> 28 #include "key.h" 29 #include "sta_info.h" 30 31 struct ieee80211_local; 32 33 /* Maximum number of broadcast/multicast frames to buffer when some of the 34 * associated stations are using power saving. */ 35 #define AP_MAX_BC_BUFFER 128 36 37 /* Maximum number of frames buffered to all STAs, including multicast frames. 38 * Note: increasing this limit increases the potential memory requirement. Each 39 * frame can be up to about 2 kB long. */ 40 #define TOTAL_MAX_TX_BUFFER 512 41 42 /* Required encryption head and tailroom */ 43 #define IEEE80211_ENCRYPT_HEADROOM 8 44 #define IEEE80211_ENCRYPT_TAILROOM 18 45 46 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent 47 * reception of at least three fragmented frames. This limit can be increased 48 * by changing this define, at the cost of slower frame reassembly and 49 * increased memory use (about 2 kB of RAM per entry). */ 50 #define IEEE80211_FRAGMENT_MAX 4 51 52 /* 53 * Time after which we ignore scan results and no longer report/use 54 * them in any way. 55 */ 56 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) 57 58 #define TU_TO_EXP_TIME(x) (jiffies + usecs_to_jiffies((x) * 1024)) 59 60 struct ieee80211_fragment_entry { 61 unsigned long first_frag_time; 62 unsigned int seq; 63 unsigned int rx_queue; 64 unsigned int last_frag; 65 unsigned int extra_len; 66 struct sk_buff_head skb_list; 67 int ccmp; /* Whether fragments were encrypted with CCMP */ 68 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */ 69 }; 70 71 72 struct ieee80211_bss { 73 /* Yes, this is a hack */ 74 struct cfg80211_bss cbss; 75 76 /* don't want to look up all the time */ 77 size_t ssid_len; 78 u8 ssid[IEEE80211_MAX_SSID_LEN]; 79 80 u8 dtim_period; 81 82 bool wmm_used; 83 84 unsigned long last_probe_resp; 85 86 #ifdef CONFIG_MAC80211_MESH 87 u8 *mesh_id; 88 size_t mesh_id_len; 89 u8 *mesh_cfg; 90 #endif 91 92 #define IEEE80211_MAX_SUPP_RATES 32 93 u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; 94 size_t supp_rates_len; 95 96 /* 97 * During assocation, we save an ERP value from a probe response so 98 * that we can feed ERP info to the driver when handling the 99 * association completes. these fields probably won't be up-to-date 100 * otherwise, you probably don't want to use them. 101 */ 102 bool has_erp_value; 103 u8 erp_value; 104 }; 105 106 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss) 107 { 108 #ifdef CONFIG_MAC80211_MESH 109 return bss->mesh_cfg; 110 #endif 111 return NULL; 112 } 113 114 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss) 115 { 116 #ifdef CONFIG_MAC80211_MESH 117 return bss->mesh_id; 118 #endif 119 return NULL; 120 } 121 122 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss) 123 { 124 #ifdef CONFIG_MAC80211_MESH 125 return bss->mesh_id_len; 126 #endif 127 return 0; 128 } 129 130 131 typedef unsigned __bitwise__ ieee80211_tx_result; 132 #define TX_CONTINUE ((__force ieee80211_tx_result) 0u) 133 #define TX_DROP ((__force ieee80211_tx_result) 1u) 134 #define TX_QUEUED ((__force ieee80211_tx_result) 2u) 135 136 #define IEEE80211_TX_FRAGMENTED BIT(0) 137 #define IEEE80211_TX_UNICAST BIT(1) 138 #define IEEE80211_TX_PS_BUFFERED BIT(2) 139 140 struct ieee80211_tx_data { 141 struct sk_buff *skb; 142 struct net_device *dev; 143 struct ieee80211_local *local; 144 struct ieee80211_sub_if_data *sdata; 145 struct sta_info *sta; 146 struct ieee80211_key *key; 147 148 struct ieee80211_channel *channel; 149 150 u16 ethertype; 151 unsigned int flags; 152 }; 153 154 155 typedef unsigned __bitwise__ ieee80211_rx_result; 156 #define RX_CONTINUE ((__force ieee80211_rx_result) 0u) 157 #define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u) 158 #define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u) 159 #define RX_QUEUED ((__force ieee80211_rx_result) 3u) 160 161 #define IEEE80211_RX_IN_SCAN BIT(0) 162 /* frame is destined to interface currently processed (incl. multicast frames) */ 163 #define IEEE80211_RX_RA_MATCH BIT(1) 164 #define IEEE80211_RX_AMSDU BIT(2) 165 #define IEEE80211_RX_CMNTR_REPORTED BIT(3) 166 #define IEEE80211_RX_FRAGMENTED BIT(4) 167 168 struct ieee80211_rx_data { 169 struct sk_buff *skb; 170 struct net_device *dev; 171 struct ieee80211_local *local; 172 struct ieee80211_sub_if_data *sdata; 173 struct sta_info *sta; 174 struct ieee80211_key *key; 175 struct ieee80211_rx_status *status; 176 struct ieee80211_rate *rate; 177 178 unsigned int flags; 179 int sent_ps_buffered; 180 int queue; 181 u32 tkip_iv32; 182 u16 tkip_iv16; 183 }; 184 185 struct beacon_data { 186 u8 *head, *tail; 187 int head_len, tail_len; 188 int dtim_period; 189 }; 190 191 struct ieee80211_if_ap { 192 struct beacon_data *beacon; 193 194 struct list_head vlans; 195 196 /* yes, this looks ugly, but guarantees that we can later use 197 * bitmap_empty :) 198 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */ 199 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]; 200 struct sk_buff_head ps_bc_buf; 201 atomic_t num_sta_ps; /* number of stations in PS mode */ 202 int dtim_count; 203 }; 204 205 struct ieee80211_if_wds { 206 struct sta_info *sta; 207 u8 remote_addr[ETH_ALEN]; 208 }; 209 210 struct ieee80211_if_vlan { 211 struct list_head list; 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 }; 316 317 enum ieee80211_ibss_request { 318 IEEE80211_IBSS_REQ_RUN = 0, 319 }; 320 321 struct ieee80211_if_ibss { 322 struct timer_list timer; 323 struct work_struct work; 324 325 struct sk_buff_head skb_queue; 326 327 unsigned long request; 328 unsigned long last_scan_completed; 329 330 bool timer_running; 331 332 bool fixed_bssid; 333 bool fixed_channel; 334 bool privacy; 335 336 u8 bssid[ETH_ALEN]; 337 u8 ssid[IEEE80211_MAX_SSID_LEN]; 338 u8 ssid_len, ie_len; 339 u8 *ie; 340 struct ieee80211_channel *channel; 341 342 unsigned long ibss_join_req; 343 /* probe response/beacon for IBSS */ 344 struct sk_buff *presp, *skb; 345 346 enum { 347 IEEE80211_IBSS_MLME_SEARCH, 348 IEEE80211_IBSS_MLME_JOINED, 349 } state; 350 }; 351 352 struct ieee80211_if_mesh { 353 struct work_struct work; 354 struct timer_list housekeeping_timer; 355 struct timer_list mesh_path_timer; 356 struct sk_buff_head skb_queue; 357 358 unsigned long timers_running; 359 360 unsigned long wrkq_flags; 361 362 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN]; 363 size_t mesh_id_len; 364 /* Active Path Selection Protocol Identifier */ 365 u8 mesh_pp_id[4]; 366 /* Active Path Selection Metric Identifier */ 367 u8 mesh_pm_id[4]; 368 /* Congestion Control Mode Identifier */ 369 u8 mesh_cc_id[4]; 370 /* Synchronization Protocol Identifier */ 371 u8 mesh_sp_id[4]; 372 /* Authentication Protocol Identifier */ 373 u8 mesh_auth_id[4]; 374 /* Local mesh Destination Sequence Number */ 375 u32 dsn; 376 /* Last used PREQ ID */ 377 u32 preq_id; 378 atomic_t mpaths; 379 /* Timestamp of last DSN update */ 380 unsigned long last_dsn_update; 381 /* Timestamp of last DSN sent */ 382 unsigned long last_preq; 383 struct mesh_rmc *rmc; 384 spinlock_t mesh_preq_queue_lock; 385 struct mesh_preq_queue preq_queue; 386 int preq_queue_len; 387 struct mesh_stats mshstats; 388 struct mesh_config mshcfg; 389 u32 mesh_seqnum; 390 bool accepting_plinks; 391 }; 392 393 #ifdef CONFIG_MAC80211_MESH 394 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \ 395 do { (msh)->mshstats.name++; } while (0) 396 #else 397 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \ 398 do { } while (0) 399 #endif 400 401 /** 402 * enum ieee80211_sub_if_data_flags - virtual interface flags 403 * 404 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets 405 * @IEEE80211_SDATA_PROMISC: interface is promisc 406 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode 407 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between 408 * associated stations and deliver multicast frames both 409 * back to wireless media and to the local net stack. 410 */ 411 enum ieee80211_sub_if_data_flags { 412 IEEE80211_SDATA_ALLMULTI = BIT(0), 413 IEEE80211_SDATA_PROMISC = BIT(1), 414 IEEE80211_SDATA_OPERATING_GMODE = BIT(2), 415 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3), 416 }; 417 418 struct ieee80211_sub_if_data { 419 struct list_head list; 420 421 struct wireless_dev wdev; 422 423 /* keys */ 424 struct list_head key_list; 425 426 struct net_device *dev; 427 struct ieee80211_local *local; 428 429 unsigned int flags; 430 431 int drop_unencrypted; 432 433 /* 434 * keep track of whether the HT opmode (stored in 435 * vif.bss_info.ht_operation_mode) is valid. 436 */ 437 bool ht_opmode_valid; 438 439 /* Fragment table for host-based reassembly */ 440 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX]; 441 unsigned int fragment_next; 442 443 #define NUM_DEFAULT_KEYS 4 444 #define NUM_DEFAULT_MGMT_KEYS 2 445 struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 446 struct ieee80211_key *default_key; 447 struct ieee80211_key *default_mgmt_key; 448 449 u16 sequence_number; 450 451 /* 452 * AP this belongs to: self in AP mode and 453 * corresponding AP in VLAN mode, NULL for 454 * all others (might be needed later in IBSS) 455 */ 456 struct ieee80211_if_ap *bss; 457 458 int force_unicast_rateidx; /* forced TX rateidx for unicast frames */ 459 int max_ratectrl_rateidx; /* max TX rateidx for rate control */ 460 461 union { 462 struct ieee80211_if_ap ap; 463 struct ieee80211_if_wds wds; 464 struct ieee80211_if_vlan vlan; 465 struct ieee80211_if_managed mgd; 466 struct ieee80211_if_ibss ibss; 467 #ifdef CONFIG_MAC80211_MESH 468 struct ieee80211_if_mesh mesh; 469 #endif 470 u32 mntr_flags; 471 } u; 472 473 #ifdef CONFIG_MAC80211_DEBUGFS 474 struct dentry *debugfsdir; 475 union { 476 struct { 477 struct dentry *drop_unencrypted; 478 struct dentry *bssid; 479 struct dentry *aid; 480 struct dentry *capab; 481 struct dentry *force_unicast_rateidx; 482 struct dentry *max_ratectrl_rateidx; 483 } sta; 484 struct { 485 struct dentry *drop_unencrypted; 486 struct dentry *num_sta_ps; 487 struct dentry *dtim_count; 488 struct dentry *force_unicast_rateidx; 489 struct dentry *max_ratectrl_rateidx; 490 struct dentry *num_buffered_multicast; 491 } ap; 492 struct { 493 struct dentry *drop_unencrypted; 494 struct dentry *peer; 495 struct dentry *force_unicast_rateidx; 496 struct dentry *max_ratectrl_rateidx; 497 } wds; 498 struct { 499 struct dentry *drop_unencrypted; 500 struct dentry *force_unicast_rateidx; 501 struct dentry *max_ratectrl_rateidx; 502 } vlan; 503 struct { 504 struct dentry *mode; 505 } monitor; 506 } debugfs; 507 struct { 508 struct dentry *default_key; 509 struct dentry *default_mgmt_key; 510 } common_debugfs; 511 512 #ifdef CONFIG_MAC80211_MESH 513 struct dentry *mesh_stats_dir; 514 struct { 515 struct dentry *fwded_mcast; 516 struct dentry *fwded_unicast; 517 struct dentry *fwded_frames; 518 struct dentry *dropped_frames_ttl; 519 struct dentry *dropped_frames_no_route; 520 struct dentry *estab_plinks; 521 struct timer_list mesh_path_timer; 522 } mesh_stats; 523 524 struct dentry *mesh_config_dir; 525 struct { 526 struct dentry *dot11MeshRetryTimeout; 527 struct dentry *dot11MeshConfirmTimeout; 528 struct dentry *dot11MeshHoldingTimeout; 529 struct dentry *dot11MeshMaxRetries; 530 struct dentry *dot11MeshTTL; 531 struct dentry *auto_open_plinks; 532 struct dentry *dot11MeshMaxPeerLinks; 533 struct dentry *dot11MeshHWMPactivePathTimeout; 534 struct dentry *dot11MeshHWMPpreqMinInterval; 535 struct dentry *dot11MeshHWMPnetDiameterTraversalTime; 536 struct dentry *dot11MeshHWMPmaxPREQretries; 537 struct dentry *path_refresh_time; 538 struct dentry *min_discovery_timeout; 539 } mesh_config; 540 #endif 541 542 #endif 543 /* must be last, dynamically sized area in this! */ 544 struct ieee80211_vif vif; 545 }; 546 547 static inline 548 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p) 549 { 550 return container_of(p, struct ieee80211_sub_if_data, vif); 551 } 552 553 static inline void 554 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata, 555 u8 mesh_id_len, u8 *mesh_id) 556 { 557 #ifdef CONFIG_MAC80211_MESH 558 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 559 ifmsh->mesh_id_len = mesh_id_len; 560 memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len); 561 #else 562 WARN_ON(1); 563 #endif 564 } 565 566 enum { 567 IEEE80211_RX_MSG = 1, 568 IEEE80211_TX_STATUS_MSG = 2, 569 IEEE80211_DELBA_MSG = 3, 570 IEEE80211_ADDBA_MSG = 4, 571 }; 572 573 enum queue_stop_reason { 574 IEEE80211_QUEUE_STOP_REASON_DRIVER, 575 IEEE80211_QUEUE_STOP_REASON_PS, 576 IEEE80211_QUEUE_STOP_REASON_CSA, 577 IEEE80211_QUEUE_STOP_REASON_AGGREGATION, 578 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 579 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 580 }; 581 582 /** 583 * mac80211 scan flags - currently active scan mode 584 * 585 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as 586 * well be on the operating channel 587 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to 588 * determine if we are on the operating channel or not 589 * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning, 590 * gets only set in conjunction with SCAN_SW_SCANNING 591 */ 592 enum { 593 SCAN_SW_SCANNING, 594 SCAN_HW_SCANNING, 595 SCAN_OFF_CHANNEL, 596 }; 597 598 /** 599 * enum mac80211_scan_state - scan state machine states 600 * 601 * @SCAN_DECISION: Main entry point to the scan state machine, this state 602 * determines if we should keep on scanning or switch back to the 603 * operating channel 604 * @SCAN_SET_CHANNEL: Set the next channel to be scanned 605 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses 606 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP 607 * about us leaving the channel and stop all associated STA interfaces 608 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the 609 * AP about us being back and restart all associated STA interfaces 610 */ 611 enum mac80211_scan_state { 612 SCAN_DECISION, 613 SCAN_SET_CHANNEL, 614 SCAN_SEND_PROBE, 615 SCAN_LEAVE_OPER_CHANNEL, 616 SCAN_ENTER_OPER_CHANNEL, 617 }; 618 619 struct ieee80211_local { 620 /* embed the driver visible part. 621 * don't cast (use the static inlines below), but we keep 622 * it first anyway so they become a no-op */ 623 struct ieee80211_hw hw; 624 625 const struct ieee80211_ops *ops; 626 627 /* 628 * private workqueue to mac80211. mac80211 makes this accessible 629 * via ieee80211_queue_work() 630 */ 631 struct workqueue_struct *workqueue; 632 633 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES]; 634 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */ 635 spinlock_t queue_stop_reason_lock; 636 637 int open_count; 638 int monitors, cooked_mntrs; 639 /* number of interfaces with corresponding FIF_ flags */ 640 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll; 641 unsigned int filter_flags; /* FIF_* */ 642 struct iw_statistics wstats; 643 644 /* protects the aggregated multicast list and filter calls */ 645 spinlock_t filter_lock; 646 647 /* used for uploading changed mc list */ 648 struct work_struct reconfig_filter; 649 650 /* aggregated multicast list */ 651 struct dev_addr_list *mc_list; 652 int mc_count; 653 654 bool tim_in_locked_section; /* see ieee80211_beacon_get() */ 655 656 /* 657 * suspended is true if we finished all the suspend _and_ we have 658 * not yet come up from resume. This is to be used by mac80211 659 * to ensure driver sanity during suspend and mac80211's own 660 * sanity. It can eventually be used for WoW as well. 661 */ 662 bool suspended; 663 664 /* 665 * Resuming is true while suspended, but when we're reprogramming the 666 * hardware -- at that time it's allowed to use ieee80211_queue_work() 667 * again even though some other parts of the stack are still suspended 668 * and we still drop received frames to avoid waking the stack. 669 */ 670 bool resuming; 671 672 /* 673 * quiescing is true during the suspend process _only_ to 674 * ease timer cancelling etc. 675 */ 676 bool quiescing; 677 678 /* device is started */ 679 bool started; 680 681 int tx_headroom; /* required headroom for hardware/radiotap */ 682 683 /* Tasklet and skb queue to process calls from IRQ mode. All frames 684 * added to skb_queue will be processed, but frames in 685 * skb_queue_unreliable may be dropped if the total length of these 686 * queues increases over the limit. */ 687 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128 688 struct tasklet_struct tasklet; 689 struct sk_buff_head skb_queue; 690 struct sk_buff_head skb_queue_unreliable; 691 692 /* Station data */ 693 /* 694 * The lock only protects the list, hash, timer and counter 695 * against manipulation, reads are done in RCU. Additionally, 696 * the lock protects each BSS's TIM bitmap. 697 */ 698 spinlock_t sta_lock; 699 unsigned long num_sta; 700 struct list_head sta_list; 701 struct sta_info *sta_hash[STA_HASH_SIZE]; 702 struct timer_list sta_cleanup; 703 int sta_generation; 704 705 struct sk_buff_head pending[IEEE80211_MAX_QUEUES]; 706 struct tasklet_struct tx_pending_tasklet; 707 708 /* 709 * This lock is used to prevent concurrent A-MPDU 710 * session start/stop processing, this thus also 711 * synchronises the ->ampdu_action() callback to 712 * drivers and limits it to one at a time. 713 */ 714 spinlock_t ampdu_lock; 715 716 /* number of interfaces with corresponding IFF_ flags */ 717 atomic_t iff_allmultis, iff_promiscs; 718 719 struct rate_control_ref *rate_ctrl; 720 721 struct crypto_blkcipher *wep_tx_tfm; 722 struct crypto_blkcipher *wep_rx_tfm; 723 u32 wep_iv; 724 725 /* see iface.c */ 726 struct list_head interfaces; 727 struct mutex iflist_mtx; 728 729 /* 730 * Key lock, protects sdata's key_list and sta_info's 731 * key pointers (write access, they're RCU.) 732 */ 733 spinlock_t key_lock; 734 735 736 /* Scanning and BSS list */ 737 struct mutex scan_mtx; 738 unsigned long scanning; 739 struct cfg80211_ssid scan_ssid; 740 struct cfg80211_scan_request *int_scan_req; 741 struct cfg80211_scan_request *scan_req; 742 struct ieee80211_channel *scan_channel; 743 const u8 *orig_ies; 744 int orig_ies_len; 745 int scan_channel_idx; 746 int scan_ies_len; 747 748 enum mac80211_scan_state next_scan_state; 749 struct delayed_work scan_work; 750 struct ieee80211_sub_if_data *scan_sdata; 751 enum nl80211_channel_type oper_channel_type; 752 struct ieee80211_channel *oper_channel, *csa_channel; 753 754 /* SNMP counters */ 755 /* dot11CountersTable */ 756 u32 dot11TransmittedFragmentCount; 757 u32 dot11MulticastTransmittedFrameCount; 758 u32 dot11FailedCount; 759 u32 dot11RetryCount; 760 u32 dot11MultipleRetryCount; 761 u32 dot11FrameDuplicateCount; 762 u32 dot11ReceivedFragmentCount; 763 u32 dot11MulticastReceivedFrameCount; 764 u32 dot11TransmittedFrameCount; 765 766 #ifdef CONFIG_MAC80211_LEDS 767 int tx_led_counter, rx_led_counter; 768 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led; 769 char tx_led_name[32], rx_led_name[32], 770 assoc_led_name[32], radio_led_name[32]; 771 #endif 772 773 #ifdef CONFIG_MAC80211_DEBUGFS 774 struct work_struct sta_debugfs_add; 775 #endif 776 777 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 778 /* TX/RX handler statistics */ 779 unsigned int tx_handlers_drop; 780 unsigned int tx_handlers_queued; 781 unsigned int tx_handlers_drop_unencrypted; 782 unsigned int tx_handlers_drop_fragment; 783 unsigned int tx_handlers_drop_wep; 784 unsigned int tx_handlers_drop_not_assoc; 785 unsigned int tx_handlers_drop_unauth_port; 786 unsigned int rx_handlers_drop; 787 unsigned int rx_handlers_queued; 788 unsigned int rx_handlers_drop_nullfunc; 789 unsigned int rx_handlers_drop_defrag; 790 unsigned int rx_handlers_drop_short; 791 unsigned int rx_handlers_drop_passive_scan; 792 unsigned int tx_expand_skb_head; 793 unsigned int tx_expand_skb_head_cloned; 794 unsigned int rx_expand_skb_head; 795 unsigned int rx_expand_skb_head2; 796 unsigned int rx_handlers_fragments; 797 unsigned int tx_status_drop; 798 #define I802_DEBUG_INC(c) (c)++ 799 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */ 800 #define I802_DEBUG_INC(c) do { } while (0) 801 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */ 802 803 804 int total_ps_buffered; /* total number of all buffered unicast and 805 * multicast packets for power saving stations 806 */ 807 int wifi_wme_noack_test; 808 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */ 809 810 bool pspolling; 811 /* 812 * PS can only be enabled when we have exactly one managed 813 * interface (and monitors) in PS, this then points there. 814 */ 815 struct ieee80211_sub_if_data *ps_sdata; 816 struct work_struct dynamic_ps_enable_work; 817 struct work_struct dynamic_ps_disable_work; 818 struct timer_list dynamic_ps_timer; 819 struct notifier_block network_latency_notifier; 820 821 int user_power_level; /* in dBm */ 822 int power_constr_level; /* in dBm */ 823 824 struct work_struct restart_work; 825 826 #ifdef CONFIG_MAC80211_DEBUGFS 827 struct local_debugfsdentries { 828 struct dentry *rcdir; 829 struct dentry *rcname; 830 struct dentry *frequency; 831 struct dentry *total_ps_buffered; 832 struct dentry *wep_iv; 833 struct dentry *tsf; 834 struct dentry *queues; 835 struct dentry *reset; 836 struct dentry *noack; 837 struct dentry *statistics; 838 struct local_debugfsdentries_statsdentries { 839 struct dentry *transmitted_fragment_count; 840 struct dentry *multicast_transmitted_frame_count; 841 struct dentry *failed_count; 842 struct dentry *retry_count; 843 struct dentry *multiple_retry_count; 844 struct dentry *frame_duplicate_count; 845 struct dentry *received_fragment_count; 846 struct dentry *multicast_received_frame_count; 847 struct dentry *transmitted_frame_count; 848 struct dentry *wep_undecryptable_count; 849 struct dentry *num_scans; 850 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 851 struct dentry *tx_handlers_drop; 852 struct dentry *tx_handlers_queued; 853 struct dentry *tx_handlers_drop_unencrypted; 854 struct dentry *tx_handlers_drop_fragment; 855 struct dentry *tx_handlers_drop_wep; 856 struct dentry *tx_handlers_drop_not_assoc; 857 struct dentry *tx_handlers_drop_unauth_port; 858 struct dentry *rx_handlers_drop; 859 struct dentry *rx_handlers_queued; 860 struct dentry *rx_handlers_drop_nullfunc; 861 struct dentry *rx_handlers_drop_defrag; 862 struct dentry *rx_handlers_drop_short; 863 struct dentry *rx_handlers_drop_passive_scan; 864 struct dentry *tx_expand_skb_head; 865 struct dentry *tx_expand_skb_head_cloned; 866 struct dentry *rx_expand_skb_head; 867 struct dentry *rx_expand_skb_head2; 868 struct dentry *rx_handlers_fragments; 869 struct dentry *tx_status_drop; 870 #endif 871 struct dentry *dot11ACKFailureCount; 872 struct dentry *dot11RTSFailureCount; 873 struct dentry *dot11FCSErrorCount; 874 struct dentry *dot11RTSSuccessCount; 875 } stats; 876 struct dentry *stations; 877 struct dentry *keys; 878 } debugfs; 879 #endif 880 }; 881 882 static inline struct ieee80211_sub_if_data * 883 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev) 884 { 885 return netdev_priv(dev); 886 } 887 888 /* this struct represents 802.11n's RA/TID combination */ 889 struct ieee80211_ra_tid { 890 u8 ra[ETH_ALEN]; 891 u16 tid; 892 }; 893 894 /* Parsed Information Elements */ 895 struct ieee802_11_elems { 896 u8 *ie_start; 897 size_t total_len; 898 899 /* pointers to IEs */ 900 u8 *ssid; 901 u8 *supp_rates; 902 u8 *fh_params; 903 u8 *ds_params; 904 u8 *cf_params; 905 struct ieee80211_tim_ie *tim; 906 u8 *ibss_params; 907 u8 *challenge; 908 u8 *wpa; 909 u8 *rsn; 910 u8 *erp_info; 911 u8 *ext_supp_rates; 912 u8 *wmm_info; 913 u8 *wmm_param; 914 struct ieee80211_ht_cap *ht_cap_elem; 915 struct ieee80211_ht_info *ht_info_elem; 916 u8 *mesh_config; 917 u8 *mesh_id; 918 u8 *peer_link; 919 u8 *preq; 920 u8 *prep; 921 u8 *perr; 922 u8 *ch_switch_elem; 923 u8 *country_elem; 924 u8 *pwr_constr_elem; 925 u8 *quiet_elem; /* first quite element */ 926 u8 *timeout_int; 927 928 /* length of them, respectively */ 929 u8 ssid_len; 930 u8 supp_rates_len; 931 u8 fh_params_len; 932 u8 ds_params_len; 933 u8 cf_params_len; 934 u8 tim_len; 935 u8 ibss_params_len; 936 u8 challenge_len; 937 u8 wpa_len; 938 u8 rsn_len; 939 u8 erp_info_len; 940 u8 ext_supp_rates_len; 941 u8 wmm_info_len; 942 u8 wmm_param_len; 943 u8 mesh_config_len; 944 u8 mesh_id_len; 945 u8 peer_link_len; 946 u8 preq_len; 947 u8 prep_len; 948 u8 perr_len; 949 u8 ch_switch_elem_len; 950 u8 country_elem_len; 951 u8 pwr_constr_elem_len; 952 u8 quiet_elem_len; 953 u8 num_of_quiet_elem; /* can be more the one */ 954 u8 timeout_int_len; 955 }; 956 957 static inline struct ieee80211_local *hw_to_local( 958 struct ieee80211_hw *hw) 959 { 960 return container_of(hw, struct ieee80211_local, hw); 961 } 962 963 static inline struct ieee80211_hw *local_to_hw( 964 struct ieee80211_local *local) 965 { 966 return &local->hw; 967 } 968 969 970 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr) 971 { 972 return compare_ether_addr(raddr, addr) == 0 || 973 is_broadcast_ether_addr(raddr); 974 } 975 976 977 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed); 978 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx); 979 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 980 u32 changed); 981 void ieee80211_configure_filter(struct ieee80211_local *local); 982 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata); 983 984 /* STA code */ 985 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata); 986 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 987 struct cfg80211_auth_request *req); 988 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 989 struct cfg80211_assoc_request *req); 990 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 991 struct cfg80211_deauth_request *req, 992 void *cookie); 993 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 994 struct cfg80211_disassoc_request *req, 995 void *cookie); 996 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, 997 struct sk_buff *skb); 998 void ieee80211_send_pspoll(struct ieee80211_local *local, 999 struct ieee80211_sub_if_data *sdata); 1000 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency); 1001 int ieee80211_max_network_latency(struct notifier_block *nb, 1002 unsigned long data, void *dummy); 1003 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1004 struct ieee80211_channel_sw_ie *sw_elem, 1005 struct ieee80211_bss *bss); 1006 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata); 1007 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata); 1008 1009 /* IBSS code */ 1010 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local); 1011 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata); 1012 ieee80211_rx_result 1013 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); 1014 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, 1015 u8 *bssid, u8 *addr, u32 supp_rates); 1016 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 1017 struct cfg80211_ibss_params *params); 1018 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata); 1019 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata); 1020 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata); 1021 1022 /* scan/BSS handling */ 1023 void ieee80211_scan_work(struct work_struct *work); 1024 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata, 1025 const u8 *ssid, u8 ssid_len); 1026 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, 1027 struct cfg80211_scan_request *req); 1028 void ieee80211_scan_cancel(struct ieee80211_local *local); 1029 ieee80211_rx_result 1030 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); 1031 1032 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local); 1033 struct ieee80211_bss * 1034 ieee80211_bss_info_update(struct ieee80211_local *local, 1035 struct ieee80211_rx_status *rx_status, 1036 struct ieee80211_mgmt *mgmt, 1037 size_t len, 1038 struct ieee802_11_elems *elems, 1039 struct ieee80211_channel *channel, 1040 bool beacon); 1041 struct ieee80211_bss * 1042 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, 1043 u8 *ssid, u8 ssid_len); 1044 void ieee80211_rx_bss_put(struct ieee80211_local *local, 1045 struct ieee80211_bss *bss); 1046 1047 /* interface handling */ 1048 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1049 struct net_device **new_dev, enum nl80211_iftype type, 1050 struct vif_params *params); 1051 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1052 enum nl80211_iftype type); 1053 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata); 1054 void ieee80211_remove_interfaces(struct ieee80211_local *local); 1055 u32 __ieee80211_recalc_idle(struct ieee80211_local *local); 1056 void ieee80211_recalc_idle(struct ieee80211_local *local); 1057 1058 /* tx handling */ 1059 void ieee80211_clear_tx_pending(struct ieee80211_local *local); 1060 void ieee80211_tx_pending(unsigned long data); 1061 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, 1062 struct net_device *dev); 1063 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, 1064 struct net_device *dev); 1065 1066 /* HT */ 1067 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband, 1068 struct ieee80211_ht_cap *ht_cap_ie, 1069 struct ieee80211_sta_ht_cap *ht_cap); 1070 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn); 1071 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, 1072 const u8 *da, u16 tid, 1073 u16 initiator, u16 reason_code); 1074 1075 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da, 1076 u16 tid, u16 initiator, u16 reason); 1077 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, 1078 u16 initiator, u16 reason); 1079 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta); 1080 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, 1081 struct sta_info *sta, 1082 struct ieee80211_mgmt *mgmt, size_t len); 1083 void ieee80211_process_addba_resp(struct ieee80211_local *local, 1084 struct sta_info *sta, 1085 struct ieee80211_mgmt *mgmt, 1086 size_t len); 1087 void ieee80211_process_addba_request(struct ieee80211_local *local, 1088 struct sta_info *sta, 1089 struct ieee80211_mgmt *mgmt, 1090 size_t len); 1091 1092 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, 1093 enum ieee80211_back_parties initiator); 1094 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, 1095 enum ieee80211_back_parties initiator); 1096 1097 /* Spectrum management */ 1098 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata, 1099 struct ieee80211_mgmt *mgmt, 1100 size_t len); 1101 1102 /* Suspend/resume and hw reconfiguration */ 1103 int ieee80211_reconfig(struct ieee80211_local *local); 1104 void ieee80211_stop_device(struct ieee80211_local *local); 1105 1106 #ifdef CONFIG_PM 1107 int __ieee80211_suspend(struct ieee80211_hw *hw); 1108 1109 static inline int __ieee80211_resume(struct ieee80211_hw *hw) 1110 { 1111 return ieee80211_reconfig(hw_to_local(hw)); 1112 } 1113 #else 1114 static inline int __ieee80211_suspend(struct ieee80211_hw *hw) 1115 { 1116 return 0; 1117 } 1118 1119 static inline int __ieee80211_resume(struct ieee80211_hw *hw) 1120 { 1121 return 0; 1122 } 1123 #endif 1124 1125 /* utility functions/constants */ 1126 extern void *mac80211_wiphy_privid; /* for wiphy privid */ 1127 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, 1128 enum nl80211_iftype type); 1129 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, 1130 int rate, int erp, int short_preamble); 1131 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx, 1132 struct ieee80211_hdr *hdr, const u8 *tsc, 1133 gfp_t gfp); 1134 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata); 1135 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, 1136 int encrypt); 1137 void ieee802_11_parse_elems(u8 *start, size_t len, 1138 struct ieee802_11_elems *elems); 1139 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, 1140 struct ieee802_11_elems *elems, 1141 u64 filter, u32 crc); 1142 u32 ieee80211_mandatory_rates(struct ieee80211_local *local, 1143 enum ieee80211_band band); 1144 1145 void ieee80211_dynamic_ps_enable_work(struct work_struct *work); 1146 void ieee80211_dynamic_ps_disable_work(struct work_struct *work); 1147 void ieee80211_dynamic_ps_timer(unsigned long data); 1148 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1149 struct ieee80211_sub_if_data *sdata, 1150 int powersave); 1151 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 1152 struct ieee80211_hdr *hdr); 1153 void ieee80211_beacon_loss_work(struct work_struct *work); 1154 1155 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 1156 enum queue_stop_reason reason); 1157 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 1158 enum queue_stop_reason reason); 1159 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 1160 enum queue_stop_reason reason); 1161 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 1162 enum queue_stop_reason reason); 1163 void ieee80211_add_pending_skb(struct ieee80211_local *local, 1164 struct sk_buff *skb); 1165 int ieee80211_add_pending_skbs(struct ieee80211_local *local, 1166 struct sk_buff_head *skbs); 1167 1168 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1169 u16 transaction, u16 auth_alg, 1170 u8 *extra, size_t extra_len, const u8 *bssid, 1171 const u8 *key, u8 key_len, u8 key_idx); 1172 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1173 const u8 *ie, size_t ie_len); 1174 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, 1175 const u8 *ssid, size_t ssid_len, 1176 const u8 *ie, size_t ie_len); 1177 1178 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, 1179 const size_t supp_rates_len, 1180 const u8 *supp_rates); 1181 u32 ieee80211_sta_get_rates(struct ieee80211_local *local, 1182 struct ieee802_11_elems *elems, 1183 enum ieee80211_band band); 1184 1185 #ifdef CONFIG_MAC80211_NOINLINE 1186 #define debug_noinline noinline 1187 #else 1188 #define debug_noinline 1189 #endif 1190 1191 #endif /* IEEE80211_I_H */ 1192