1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2015-2016 Intel Deutschland GmbH 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * utilities for mac80211 14 */ 15 16 #include <net/mac80211.h> 17 #include <linux/netdevice.h> 18 #include <linux/export.h> 19 #include <linux/types.h> 20 #include <linux/slab.h> 21 #include <linux/skbuff.h> 22 #include <linux/etherdevice.h> 23 #include <linux/if_arp.h> 24 #include <linux/bitmap.h> 25 #include <linux/crc32.h> 26 #include <net/net_namespace.h> 27 #include <net/cfg80211.h> 28 #include <net/rtnetlink.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "mesh.h" 34 #include "wme.h" 35 #include "led.h" 36 #include "wep.h" 37 38 /* privid for wiphys to determine whether they belong to us or not */ 39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 40 41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 42 { 43 struct ieee80211_local *local; 44 BUG_ON(!wiphy); 45 46 local = wiphy_priv(wiphy); 47 return &local->hw; 48 } 49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 50 51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 52 { 53 struct sk_buff *skb; 54 struct ieee80211_hdr *hdr; 55 56 skb_queue_walk(&tx->skbs, skb) { 57 hdr = (struct ieee80211_hdr *) skb->data; 58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 59 } 60 } 61 62 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 63 int rate, int erp, int short_preamble, 64 int shift) 65 { 66 int dur; 67 68 /* calculate duration (in microseconds, rounded up to next higher 69 * integer if it includes a fractional microsecond) to send frame of 70 * len bytes (does not include FCS) at the given rate. Duration will 71 * also include SIFS. 72 * 73 * rate is in 100 kbps, so divident is multiplied by 10 in the 74 * DIV_ROUND_UP() operations. 75 * 76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 77 * is assumed to be 0 otherwise. 78 */ 79 80 if (band == NL80211_BAND_5GHZ || erp) { 81 /* 82 * OFDM: 83 * 84 * N_DBPS = DATARATE x 4 85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 86 * (16 = SIGNAL time, 6 = tail bits) 87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 88 * 89 * T_SYM = 4 usec 90 * 802.11a - 18.5.2: aSIFSTime = 16 usec 91 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 92 * signal ext = 6 usec 93 */ 94 dur = 16; /* SIFS + signal ext */ 95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 97 98 /* IEEE 802.11-2012 18.3.2.4: all values above are: 99 * * times 4 for 5 MHz 100 * * times 2 for 10 MHz 101 */ 102 dur *= 1 << shift; 103 104 /* rates should already consider the channel bandwidth, 105 * don't apply divisor again. 106 */ 107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 108 4 * rate); /* T_SYM x N_SYM */ 109 } else { 110 /* 111 * 802.11b or 802.11g with 802.11b compatibility: 112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 114 * 115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 116 * aSIFSTime = 10 usec 117 * aPreambleLength = 144 usec or 72 usec with short preamble 118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 119 */ 120 dur = 10; /* aSIFSTime = 10 usec */ 121 dur += short_preamble ? (72 + 24) : (144 + 48); 122 123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 124 } 125 126 return dur; 127 } 128 129 /* Exported duration function for driver use */ 130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 131 struct ieee80211_vif *vif, 132 enum nl80211_band band, 133 size_t frame_len, 134 struct ieee80211_rate *rate) 135 { 136 struct ieee80211_sub_if_data *sdata; 137 u16 dur; 138 int erp, shift = 0; 139 bool short_preamble = false; 140 141 erp = 0; 142 if (vif) { 143 sdata = vif_to_sdata(vif); 144 short_preamble = sdata->vif.bss_conf.use_short_preamble; 145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 146 erp = rate->flags & IEEE80211_RATE_ERP_G; 147 shift = ieee80211_vif_get_shift(vif); 148 } 149 150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 151 short_preamble, shift); 152 153 return cpu_to_le16(dur); 154 } 155 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 156 157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 158 struct ieee80211_vif *vif, size_t frame_len, 159 const struct ieee80211_tx_info *frame_txctl) 160 { 161 struct ieee80211_local *local = hw_to_local(hw); 162 struct ieee80211_rate *rate; 163 struct ieee80211_sub_if_data *sdata; 164 bool short_preamble; 165 int erp, shift = 0, bitrate; 166 u16 dur; 167 struct ieee80211_supported_band *sband; 168 169 sband = local->hw.wiphy->bands[frame_txctl->band]; 170 171 short_preamble = false; 172 173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 174 175 erp = 0; 176 if (vif) { 177 sdata = vif_to_sdata(vif); 178 short_preamble = sdata->vif.bss_conf.use_short_preamble; 179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 180 erp = rate->flags & IEEE80211_RATE_ERP_G; 181 shift = ieee80211_vif_get_shift(vif); 182 } 183 184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 185 186 /* CTS duration */ 187 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 188 erp, short_preamble, shift); 189 /* Data frame duration */ 190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 191 erp, short_preamble, shift); 192 /* ACK duration */ 193 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 194 erp, short_preamble, shift); 195 196 return cpu_to_le16(dur); 197 } 198 EXPORT_SYMBOL(ieee80211_rts_duration); 199 200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 201 struct ieee80211_vif *vif, 202 size_t frame_len, 203 const struct ieee80211_tx_info *frame_txctl) 204 { 205 struct ieee80211_local *local = hw_to_local(hw); 206 struct ieee80211_rate *rate; 207 struct ieee80211_sub_if_data *sdata; 208 bool short_preamble; 209 int erp, shift = 0, bitrate; 210 u16 dur; 211 struct ieee80211_supported_band *sband; 212 213 sband = local->hw.wiphy->bands[frame_txctl->band]; 214 215 short_preamble = false; 216 217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 218 erp = 0; 219 if (vif) { 220 sdata = vif_to_sdata(vif); 221 short_preamble = sdata->vif.bss_conf.use_short_preamble; 222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 223 erp = rate->flags & IEEE80211_RATE_ERP_G; 224 shift = ieee80211_vif_get_shift(vif); 225 } 226 227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 228 229 /* Data frame duration */ 230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 231 erp, short_preamble, shift); 232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 233 /* ACK duration */ 234 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 235 erp, short_preamble, shift); 236 } 237 238 return cpu_to_le16(dur); 239 } 240 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 241 242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 243 { 244 struct ieee80211_sub_if_data *sdata; 245 int n_acs = IEEE80211_NUM_ACS; 246 247 if (local->ops->wake_tx_queue) 248 return; 249 250 if (local->hw.queues < IEEE80211_NUM_ACS) 251 n_acs = 1; 252 253 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 254 int ac; 255 256 if (!sdata->dev) 257 continue; 258 259 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 260 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 261 continue; 262 263 for (ac = 0; ac < n_acs; ac++) { 264 int ac_queue = sdata->vif.hw_queue[ac]; 265 266 if (ac_queue == queue || 267 (sdata->vif.cab_queue == queue && 268 local->queue_stop_reasons[ac_queue] == 0 && 269 skb_queue_empty(&local->pending[ac_queue]))) 270 netif_wake_subqueue(sdata->dev, ac); 271 } 272 } 273 } 274 275 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 276 enum queue_stop_reason reason, 277 bool refcounted) 278 { 279 struct ieee80211_local *local = hw_to_local(hw); 280 281 trace_wake_queue(local, queue, reason); 282 283 if (WARN_ON(queue >= hw->queues)) 284 return; 285 286 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 287 return; 288 289 if (!refcounted) { 290 local->q_stop_reasons[queue][reason] = 0; 291 } else { 292 local->q_stop_reasons[queue][reason]--; 293 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 294 local->q_stop_reasons[queue][reason] = 0; 295 } 296 297 if (local->q_stop_reasons[queue][reason] == 0) 298 __clear_bit(reason, &local->queue_stop_reasons[queue]); 299 300 if (local->queue_stop_reasons[queue] != 0) 301 /* someone still has this queue stopped */ 302 return; 303 304 if (skb_queue_empty(&local->pending[queue])) { 305 rcu_read_lock(); 306 ieee80211_propagate_queue_wake(local, queue); 307 rcu_read_unlock(); 308 } else 309 tasklet_schedule(&local->tx_pending_tasklet); 310 } 311 312 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 313 enum queue_stop_reason reason, 314 bool refcounted) 315 { 316 struct ieee80211_local *local = hw_to_local(hw); 317 unsigned long flags; 318 319 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 320 __ieee80211_wake_queue(hw, queue, reason, refcounted); 321 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 322 } 323 324 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 325 { 326 ieee80211_wake_queue_by_reason(hw, queue, 327 IEEE80211_QUEUE_STOP_REASON_DRIVER, 328 false); 329 } 330 EXPORT_SYMBOL(ieee80211_wake_queue); 331 332 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 333 enum queue_stop_reason reason, 334 bool refcounted) 335 { 336 struct ieee80211_local *local = hw_to_local(hw); 337 struct ieee80211_sub_if_data *sdata; 338 int n_acs = IEEE80211_NUM_ACS; 339 340 trace_stop_queue(local, queue, reason); 341 342 if (WARN_ON(queue >= hw->queues)) 343 return; 344 345 if (!refcounted) 346 local->q_stop_reasons[queue][reason] = 1; 347 else 348 local->q_stop_reasons[queue][reason]++; 349 350 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 351 return; 352 353 if (local->ops->wake_tx_queue) 354 return; 355 356 if (local->hw.queues < IEEE80211_NUM_ACS) 357 n_acs = 1; 358 359 rcu_read_lock(); 360 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 361 int ac; 362 363 if (!sdata->dev) 364 continue; 365 366 for (ac = 0; ac < n_acs; ac++) { 367 if (sdata->vif.hw_queue[ac] == queue || 368 sdata->vif.cab_queue == queue) 369 netif_stop_subqueue(sdata->dev, ac); 370 } 371 } 372 rcu_read_unlock(); 373 } 374 375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 376 enum queue_stop_reason reason, 377 bool refcounted) 378 { 379 struct ieee80211_local *local = hw_to_local(hw); 380 unsigned long flags; 381 382 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 383 __ieee80211_stop_queue(hw, queue, reason, refcounted); 384 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 385 } 386 387 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 388 { 389 ieee80211_stop_queue_by_reason(hw, queue, 390 IEEE80211_QUEUE_STOP_REASON_DRIVER, 391 false); 392 } 393 EXPORT_SYMBOL(ieee80211_stop_queue); 394 395 void ieee80211_add_pending_skb(struct ieee80211_local *local, 396 struct sk_buff *skb) 397 { 398 struct ieee80211_hw *hw = &local->hw; 399 unsigned long flags; 400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 401 int queue = info->hw_queue; 402 403 if (WARN_ON(!info->control.vif)) { 404 ieee80211_free_txskb(&local->hw, skb); 405 return; 406 } 407 408 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 409 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 410 false); 411 __skb_queue_tail(&local->pending[queue], skb); 412 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 413 false); 414 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 415 } 416 417 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 418 struct sk_buff_head *skbs) 419 { 420 struct ieee80211_hw *hw = &local->hw; 421 struct sk_buff *skb; 422 unsigned long flags; 423 int queue, i; 424 425 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 426 while ((skb = skb_dequeue(skbs))) { 427 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 428 429 if (WARN_ON(!info->control.vif)) { 430 ieee80211_free_txskb(&local->hw, skb); 431 continue; 432 } 433 434 queue = info->hw_queue; 435 436 __ieee80211_stop_queue(hw, queue, 437 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 438 false); 439 440 __skb_queue_tail(&local->pending[queue], skb); 441 } 442 443 for (i = 0; i < hw->queues; i++) 444 __ieee80211_wake_queue(hw, i, 445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 446 false); 447 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 448 } 449 450 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 451 unsigned long queues, 452 enum queue_stop_reason reason, 453 bool refcounted) 454 { 455 struct ieee80211_local *local = hw_to_local(hw); 456 unsigned long flags; 457 int i; 458 459 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 460 461 for_each_set_bit(i, &queues, hw->queues) 462 __ieee80211_stop_queue(hw, i, reason, refcounted); 463 464 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 465 } 466 467 void ieee80211_stop_queues(struct ieee80211_hw *hw) 468 { 469 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 470 IEEE80211_QUEUE_STOP_REASON_DRIVER, 471 false); 472 } 473 EXPORT_SYMBOL(ieee80211_stop_queues); 474 475 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 476 { 477 struct ieee80211_local *local = hw_to_local(hw); 478 unsigned long flags; 479 int ret; 480 481 if (WARN_ON(queue >= hw->queues)) 482 return true; 483 484 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 485 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 486 &local->queue_stop_reasons[queue]); 487 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 488 return ret; 489 } 490 EXPORT_SYMBOL(ieee80211_queue_stopped); 491 492 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 493 unsigned long queues, 494 enum queue_stop_reason reason, 495 bool refcounted) 496 { 497 struct ieee80211_local *local = hw_to_local(hw); 498 unsigned long flags; 499 int i; 500 501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 502 503 for_each_set_bit(i, &queues, hw->queues) 504 __ieee80211_wake_queue(hw, i, reason, refcounted); 505 506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 507 } 508 509 void ieee80211_wake_queues(struct ieee80211_hw *hw) 510 { 511 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 512 IEEE80211_QUEUE_STOP_REASON_DRIVER, 513 false); 514 } 515 EXPORT_SYMBOL(ieee80211_wake_queues); 516 517 static unsigned int 518 ieee80211_get_vif_queues(struct ieee80211_local *local, 519 struct ieee80211_sub_if_data *sdata) 520 { 521 unsigned int queues; 522 523 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 524 int ac; 525 526 queues = 0; 527 528 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 529 queues |= BIT(sdata->vif.hw_queue[ac]); 530 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 531 queues |= BIT(sdata->vif.cab_queue); 532 } else { 533 /* all queues */ 534 queues = BIT(local->hw.queues) - 1; 535 } 536 537 return queues; 538 } 539 540 void __ieee80211_flush_queues(struct ieee80211_local *local, 541 struct ieee80211_sub_if_data *sdata, 542 unsigned int queues, bool drop) 543 { 544 if (!local->ops->flush) 545 return; 546 547 /* 548 * If no queue was set, or if the HW doesn't support 549 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 550 */ 551 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 552 queues = ieee80211_get_vif_queues(local, sdata); 553 554 ieee80211_stop_queues_by_reason(&local->hw, queues, 555 IEEE80211_QUEUE_STOP_REASON_FLUSH, 556 false); 557 558 drv_flush(local, sdata, queues, drop); 559 560 ieee80211_wake_queues_by_reason(&local->hw, queues, 561 IEEE80211_QUEUE_STOP_REASON_FLUSH, 562 false); 563 } 564 565 void ieee80211_flush_queues(struct ieee80211_local *local, 566 struct ieee80211_sub_if_data *sdata, bool drop) 567 { 568 __ieee80211_flush_queues(local, sdata, 0, drop); 569 } 570 571 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 572 struct ieee80211_sub_if_data *sdata, 573 enum queue_stop_reason reason) 574 { 575 ieee80211_stop_queues_by_reason(&local->hw, 576 ieee80211_get_vif_queues(local, sdata), 577 reason, true); 578 } 579 580 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 581 struct ieee80211_sub_if_data *sdata, 582 enum queue_stop_reason reason) 583 { 584 ieee80211_wake_queues_by_reason(&local->hw, 585 ieee80211_get_vif_queues(local, sdata), 586 reason, true); 587 } 588 589 static void __iterate_interfaces(struct ieee80211_local *local, 590 u32 iter_flags, 591 void (*iterator)(void *data, u8 *mac, 592 struct ieee80211_vif *vif), 593 void *data) 594 { 595 struct ieee80211_sub_if_data *sdata; 596 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 597 598 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 599 switch (sdata->vif.type) { 600 case NL80211_IFTYPE_MONITOR: 601 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) 602 continue; 603 break; 604 case NL80211_IFTYPE_AP_VLAN: 605 continue; 606 default: 607 break; 608 } 609 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 610 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 611 continue; 612 if (ieee80211_sdata_running(sdata) || !active_only) 613 iterator(data, sdata->vif.addr, 614 &sdata->vif); 615 } 616 617 sdata = rcu_dereference_check(local->monitor_sdata, 618 lockdep_is_held(&local->iflist_mtx) || 619 lockdep_rtnl_is_held()); 620 if (sdata && 621 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 622 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 623 iterator(data, sdata->vif.addr, &sdata->vif); 624 } 625 626 void ieee80211_iterate_interfaces( 627 struct ieee80211_hw *hw, u32 iter_flags, 628 void (*iterator)(void *data, u8 *mac, 629 struct ieee80211_vif *vif), 630 void *data) 631 { 632 struct ieee80211_local *local = hw_to_local(hw); 633 634 mutex_lock(&local->iflist_mtx); 635 __iterate_interfaces(local, iter_flags, iterator, data); 636 mutex_unlock(&local->iflist_mtx); 637 } 638 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 639 640 void ieee80211_iterate_active_interfaces_atomic( 641 struct ieee80211_hw *hw, u32 iter_flags, 642 void (*iterator)(void *data, u8 *mac, 643 struct ieee80211_vif *vif), 644 void *data) 645 { 646 struct ieee80211_local *local = hw_to_local(hw); 647 648 rcu_read_lock(); 649 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 650 iterator, data); 651 rcu_read_unlock(); 652 } 653 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 654 655 void ieee80211_iterate_active_interfaces_rtnl( 656 struct ieee80211_hw *hw, u32 iter_flags, 657 void (*iterator)(void *data, u8 *mac, 658 struct ieee80211_vif *vif), 659 void *data) 660 { 661 struct ieee80211_local *local = hw_to_local(hw); 662 663 ASSERT_RTNL(); 664 665 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 666 iterator, data); 667 } 668 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 669 670 static void __iterate_stations(struct ieee80211_local *local, 671 void (*iterator)(void *data, 672 struct ieee80211_sta *sta), 673 void *data) 674 { 675 struct sta_info *sta; 676 677 list_for_each_entry_rcu(sta, &local->sta_list, list) { 678 if (!sta->uploaded) 679 continue; 680 681 iterator(data, &sta->sta); 682 } 683 } 684 685 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 686 void (*iterator)(void *data, 687 struct ieee80211_sta *sta), 688 void *data) 689 { 690 struct ieee80211_local *local = hw_to_local(hw); 691 692 rcu_read_lock(); 693 __iterate_stations(local, iterator, data); 694 rcu_read_unlock(); 695 } 696 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 697 698 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 699 { 700 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 701 702 if (!ieee80211_sdata_running(sdata) || 703 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 704 return NULL; 705 return &sdata->vif; 706 } 707 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 708 709 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 710 { 711 struct ieee80211_sub_if_data *sdata; 712 713 if (!vif) 714 return NULL; 715 716 sdata = vif_to_sdata(vif); 717 718 if (!ieee80211_sdata_running(sdata) || 719 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 720 return NULL; 721 722 return &sdata->wdev; 723 } 724 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 725 726 /* 727 * Nothing should have been stuffed into the workqueue during 728 * the suspend->resume cycle. Since we can't check each caller 729 * of this function if we are already quiescing / suspended, 730 * check here and don't WARN since this can actually happen when 731 * the rx path (for example) is racing against __ieee80211_suspend 732 * and suspending / quiescing was set after the rx path checked 733 * them. 734 */ 735 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 736 { 737 if (local->quiescing || (local->suspended && !local->resuming)) { 738 pr_warn("queueing ieee80211 work while going to suspend\n"); 739 return false; 740 } 741 742 return true; 743 } 744 745 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 746 { 747 struct ieee80211_local *local = hw_to_local(hw); 748 749 if (!ieee80211_can_queue_work(local)) 750 return; 751 752 queue_work(local->workqueue, work); 753 } 754 EXPORT_SYMBOL(ieee80211_queue_work); 755 756 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 757 struct delayed_work *dwork, 758 unsigned long delay) 759 { 760 struct ieee80211_local *local = hw_to_local(hw); 761 762 if (!ieee80211_can_queue_work(local)) 763 return; 764 765 queue_delayed_work(local->workqueue, dwork, delay); 766 } 767 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 768 769 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 770 struct ieee802_11_elems *elems, 771 u64 filter, u32 crc) 772 { 773 size_t left = len; 774 const u8 *pos = start; 775 bool calc_crc = filter != 0; 776 DECLARE_BITMAP(seen_elems, 256); 777 const u8 *ie; 778 779 bitmap_zero(seen_elems, 256); 780 memset(elems, 0, sizeof(*elems)); 781 elems->ie_start = start; 782 elems->total_len = len; 783 784 while (left >= 2) { 785 u8 id, elen; 786 bool elem_parse_failed; 787 788 id = *pos++; 789 elen = *pos++; 790 left -= 2; 791 792 if (elen > left) { 793 elems->parse_error = true; 794 break; 795 } 796 797 switch (id) { 798 case WLAN_EID_SSID: 799 case WLAN_EID_SUPP_RATES: 800 case WLAN_EID_FH_PARAMS: 801 case WLAN_EID_DS_PARAMS: 802 case WLAN_EID_CF_PARAMS: 803 case WLAN_EID_TIM: 804 case WLAN_EID_IBSS_PARAMS: 805 case WLAN_EID_CHALLENGE: 806 case WLAN_EID_RSN: 807 case WLAN_EID_ERP_INFO: 808 case WLAN_EID_EXT_SUPP_RATES: 809 case WLAN_EID_HT_CAPABILITY: 810 case WLAN_EID_HT_OPERATION: 811 case WLAN_EID_VHT_CAPABILITY: 812 case WLAN_EID_VHT_OPERATION: 813 case WLAN_EID_MESH_ID: 814 case WLAN_EID_MESH_CONFIG: 815 case WLAN_EID_PEER_MGMT: 816 case WLAN_EID_PREQ: 817 case WLAN_EID_PREP: 818 case WLAN_EID_PERR: 819 case WLAN_EID_RANN: 820 case WLAN_EID_CHANNEL_SWITCH: 821 case WLAN_EID_EXT_CHANSWITCH_ANN: 822 case WLAN_EID_COUNTRY: 823 case WLAN_EID_PWR_CONSTRAINT: 824 case WLAN_EID_TIMEOUT_INTERVAL: 825 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 826 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 827 case WLAN_EID_CHAN_SWITCH_PARAM: 828 case WLAN_EID_EXT_CAPABILITY: 829 case WLAN_EID_CHAN_SWITCH_TIMING: 830 case WLAN_EID_LINK_ID: 831 /* 832 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 833 * that if the content gets bigger it might be needed more than once 834 */ 835 if (test_bit(id, seen_elems)) { 836 elems->parse_error = true; 837 left -= elen; 838 pos += elen; 839 continue; 840 } 841 break; 842 } 843 844 if (calc_crc && id < 64 && (filter & (1ULL << id))) 845 crc = crc32_be(crc, pos - 2, elen + 2); 846 847 elem_parse_failed = false; 848 849 switch (id) { 850 case WLAN_EID_LINK_ID: 851 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 852 elem_parse_failed = true; 853 break; 854 } 855 elems->lnk_id = (void *)(pos - 2); 856 break; 857 case WLAN_EID_CHAN_SWITCH_TIMING: 858 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 859 elem_parse_failed = true; 860 break; 861 } 862 elems->ch_sw_timing = (void *)pos; 863 break; 864 case WLAN_EID_EXT_CAPABILITY: 865 elems->ext_capab = pos; 866 elems->ext_capab_len = elen; 867 break; 868 case WLAN_EID_SSID: 869 elems->ssid = pos; 870 elems->ssid_len = elen; 871 break; 872 case WLAN_EID_SUPP_RATES: 873 elems->supp_rates = pos; 874 elems->supp_rates_len = elen; 875 break; 876 case WLAN_EID_DS_PARAMS: 877 if (elen >= 1) 878 elems->ds_params = pos; 879 else 880 elem_parse_failed = true; 881 break; 882 case WLAN_EID_TIM: 883 if (elen >= sizeof(struct ieee80211_tim_ie)) { 884 elems->tim = (void *)pos; 885 elems->tim_len = elen; 886 } else 887 elem_parse_failed = true; 888 break; 889 case WLAN_EID_CHALLENGE: 890 elems->challenge = pos; 891 elems->challenge_len = elen; 892 break; 893 case WLAN_EID_VENDOR_SPECIFIC: 894 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 895 pos[2] == 0xf2) { 896 /* Microsoft OUI (00:50:F2) */ 897 898 if (calc_crc) 899 crc = crc32_be(crc, pos - 2, elen + 2); 900 901 if (elen >= 5 && pos[3] == 2) { 902 /* OUI Type 2 - WMM IE */ 903 if (pos[4] == 0) { 904 elems->wmm_info = pos; 905 elems->wmm_info_len = elen; 906 } else if (pos[4] == 1) { 907 elems->wmm_param = pos; 908 elems->wmm_param_len = elen; 909 } 910 } 911 } 912 break; 913 case WLAN_EID_RSN: 914 elems->rsn = pos; 915 elems->rsn_len = elen; 916 break; 917 case WLAN_EID_ERP_INFO: 918 if (elen >= 1) 919 elems->erp_info = pos; 920 else 921 elem_parse_failed = true; 922 break; 923 case WLAN_EID_EXT_SUPP_RATES: 924 elems->ext_supp_rates = pos; 925 elems->ext_supp_rates_len = elen; 926 break; 927 case WLAN_EID_HT_CAPABILITY: 928 if (elen >= sizeof(struct ieee80211_ht_cap)) 929 elems->ht_cap_elem = (void *)pos; 930 else 931 elem_parse_failed = true; 932 break; 933 case WLAN_EID_HT_OPERATION: 934 if (elen >= sizeof(struct ieee80211_ht_operation)) 935 elems->ht_operation = (void *)pos; 936 else 937 elem_parse_failed = true; 938 break; 939 case WLAN_EID_VHT_CAPABILITY: 940 if (elen >= sizeof(struct ieee80211_vht_cap)) 941 elems->vht_cap_elem = (void *)pos; 942 else 943 elem_parse_failed = true; 944 break; 945 case WLAN_EID_VHT_OPERATION: 946 if (elen >= sizeof(struct ieee80211_vht_operation)) 947 elems->vht_operation = (void *)pos; 948 else 949 elem_parse_failed = true; 950 break; 951 case WLAN_EID_OPMODE_NOTIF: 952 if (elen > 0) 953 elems->opmode_notif = pos; 954 else 955 elem_parse_failed = true; 956 break; 957 case WLAN_EID_MESH_ID: 958 elems->mesh_id = pos; 959 elems->mesh_id_len = elen; 960 break; 961 case WLAN_EID_MESH_CONFIG: 962 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 963 elems->mesh_config = (void *)pos; 964 else 965 elem_parse_failed = true; 966 break; 967 case WLAN_EID_PEER_MGMT: 968 elems->peering = pos; 969 elems->peering_len = elen; 970 break; 971 case WLAN_EID_MESH_AWAKE_WINDOW: 972 if (elen >= 2) 973 elems->awake_window = (void *)pos; 974 break; 975 case WLAN_EID_PREQ: 976 elems->preq = pos; 977 elems->preq_len = elen; 978 break; 979 case WLAN_EID_PREP: 980 elems->prep = pos; 981 elems->prep_len = elen; 982 break; 983 case WLAN_EID_PERR: 984 elems->perr = pos; 985 elems->perr_len = elen; 986 break; 987 case WLAN_EID_RANN: 988 if (elen >= sizeof(struct ieee80211_rann_ie)) 989 elems->rann = (void *)pos; 990 else 991 elem_parse_failed = true; 992 break; 993 case WLAN_EID_CHANNEL_SWITCH: 994 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 995 elem_parse_failed = true; 996 break; 997 } 998 elems->ch_switch_ie = (void *)pos; 999 break; 1000 case WLAN_EID_EXT_CHANSWITCH_ANN: 1001 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1002 elem_parse_failed = true; 1003 break; 1004 } 1005 elems->ext_chansw_ie = (void *)pos; 1006 break; 1007 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1008 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1009 elem_parse_failed = true; 1010 break; 1011 } 1012 elems->sec_chan_offs = (void *)pos; 1013 break; 1014 case WLAN_EID_CHAN_SWITCH_PARAM: 1015 if (elen != 1016 sizeof(*elems->mesh_chansw_params_ie)) { 1017 elem_parse_failed = true; 1018 break; 1019 } 1020 elems->mesh_chansw_params_ie = (void *)pos; 1021 break; 1022 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1023 if (!action || 1024 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1025 elem_parse_failed = true; 1026 break; 1027 } 1028 elems->wide_bw_chansw_ie = (void *)pos; 1029 break; 1030 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1031 if (action) { 1032 elem_parse_failed = true; 1033 break; 1034 } 1035 /* 1036 * This is a bit tricky, but as we only care about 1037 * the wide bandwidth channel switch element, so 1038 * just parse it out manually. 1039 */ 1040 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1041 pos, elen); 1042 if (ie) { 1043 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1044 elems->wide_bw_chansw_ie = 1045 (void *)(ie + 2); 1046 else 1047 elem_parse_failed = true; 1048 } 1049 break; 1050 case WLAN_EID_COUNTRY: 1051 elems->country_elem = pos; 1052 elems->country_elem_len = elen; 1053 break; 1054 case WLAN_EID_PWR_CONSTRAINT: 1055 if (elen != 1) { 1056 elem_parse_failed = true; 1057 break; 1058 } 1059 elems->pwr_constr_elem = pos; 1060 break; 1061 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1062 /* Lots of different options exist, but we only care 1063 * about the Dynamic Transmit Power Control element. 1064 * First check for the Cisco OUI, then for the DTPC 1065 * tag (0x00). 1066 */ 1067 if (elen < 4) { 1068 elem_parse_failed = true; 1069 break; 1070 } 1071 1072 if (pos[0] != 0x00 || pos[1] != 0x40 || 1073 pos[2] != 0x96 || pos[3] != 0x00) 1074 break; 1075 1076 if (elen != 6) { 1077 elem_parse_failed = true; 1078 break; 1079 } 1080 1081 if (calc_crc) 1082 crc = crc32_be(crc, pos - 2, elen + 2); 1083 1084 elems->cisco_dtpc_elem = pos; 1085 break; 1086 case WLAN_EID_TIMEOUT_INTERVAL: 1087 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1088 elems->timeout_int = (void *)pos; 1089 else 1090 elem_parse_failed = true; 1091 break; 1092 default: 1093 break; 1094 } 1095 1096 if (elem_parse_failed) 1097 elems->parse_error = true; 1098 else 1099 __set_bit(id, seen_elems); 1100 1101 left -= elen; 1102 pos += elen; 1103 } 1104 1105 if (left != 0) 1106 elems->parse_error = true; 1107 1108 return crc; 1109 } 1110 1111 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1112 bool bss_notify, bool enable_qos) 1113 { 1114 struct ieee80211_local *local = sdata->local; 1115 struct ieee80211_tx_queue_params qparam; 1116 struct ieee80211_chanctx_conf *chanctx_conf; 1117 int ac; 1118 bool use_11b; 1119 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1120 int aCWmin, aCWmax; 1121 1122 if (!local->ops->conf_tx) 1123 return; 1124 1125 if (local->hw.queues < IEEE80211_NUM_ACS) 1126 return; 1127 1128 memset(&qparam, 0, sizeof(qparam)); 1129 1130 rcu_read_lock(); 1131 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1132 use_11b = (chanctx_conf && 1133 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1134 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1135 rcu_read_unlock(); 1136 1137 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1138 1139 /* Set defaults according to 802.11-2007 Table 7-37 */ 1140 aCWmax = 1023; 1141 if (use_11b) 1142 aCWmin = 31; 1143 else 1144 aCWmin = 15; 1145 1146 /* Confiure old 802.11b/g medium access rules. */ 1147 qparam.cw_max = aCWmax; 1148 qparam.cw_min = aCWmin; 1149 qparam.txop = 0; 1150 qparam.aifs = 2; 1151 1152 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1153 /* Update if QoS is enabled. */ 1154 if (enable_qos) { 1155 switch (ac) { 1156 case IEEE80211_AC_BK: 1157 qparam.cw_max = aCWmax; 1158 qparam.cw_min = aCWmin; 1159 qparam.txop = 0; 1160 if (is_ocb) 1161 qparam.aifs = 9; 1162 else 1163 qparam.aifs = 7; 1164 break; 1165 /* never happens but let's not leave undefined */ 1166 default: 1167 case IEEE80211_AC_BE: 1168 qparam.cw_max = aCWmax; 1169 qparam.cw_min = aCWmin; 1170 qparam.txop = 0; 1171 if (is_ocb) 1172 qparam.aifs = 6; 1173 else 1174 qparam.aifs = 3; 1175 break; 1176 case IEEE80211_AC_VI: 1177 qparam.cw_max = aCWmin; 1178 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1179 if (is_ocb) 1180 qparam.txop = 0; 1181 else if (use_11b) 1182 qparam.txop = 6016/32; 1183 else 1184 qparam.txop = 3008/32; 1185 1186 if (is_ocb) 1187 qparam.aifs = 3; 1188 else 1189 qparam.aifs = 2; 1190 break; 1191 case IEEE80211_AC_VO: 1192 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1193 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1194 if (is_ocb) 1195 qparam.txop = 0; 1196 else if (use_11b) 1197 qparam.txop = 3264/32; 1198 else 1199 qparam.txop = 1504/32; 1200 qparam.aifs = 2; 1201 break; 1202 } 1203 } 1204 1205 qparam.uapsd = false; 1206 1207 sdata->tx_conf[ac] = qparam; 1208 drv_conf_tx(local, sdata, ac, &qparam); 1209 } 1210 1211 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1212 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { 1213 sdata->vif.bss_conf.qos = enable_qos; 1214 if (bss_notify) 1215 ieee80211_bss_info_change_notify(sdata, 1216 BSS_CHANGED_QOS); 1217 } 1218 } 1219 1220 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1221 u16 transaction, u16 auth_alg, u16 status, 1222 const u8 *extra, size_t extra_len, const u8 *da, 1223 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1224 u32 tx_flags) 1225 { 1226 struct ieee80211_local *local = sdata->local; 1227 struct sk_buff *skb; 1228 struct ieee80211_mgmt *mgmt; 1229 int err; 1230 1231 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1232 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1233 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1234 if (!skb) 1235 return; 1236 1237 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1238 1239 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); 1240 memset(mgmt, 0, 24 + 6); 1241 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1242 IEEE80211_STYPE_AUTH); 1243 memcpy(mgmt->da, da, ETH_ALEN); 1244 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1245 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1246 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1247 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1248 mgmt->u.auth.status_code = cpu_to_le16(status); 1249 if (extra) 1250 memcpy(skb_put(skb, extra_len), extra, extra_len); 1251 1252 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1253 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1254 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1255 WARN_ON(err); 1256 } 1257 1258 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1259 tx_flags; 1260 ieee80211_tx_skb(sdata, skb); 1261 } 1262 1263 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1264 const u8 *bssid, u16 stype, u16 reason, 1265 bool send_frame, u8 *frame_buf) 1266 { 1267 struct ieee80211_local *local = sdata->local; 1268 struct sk_buff *skb; 1269 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1270 1271 /* build frame */ 1272 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1273 mgmt->duration = 0; /* initialize only */ 1274 mgmt->seq_ctrl = 0; /* initialize only */ 1275 memcpy(mgmt->da, bssid, ETH_ALEN); 1276 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1277 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1278 /* u.deauth.reason_code == u.disassoc.reason_code */ 1279 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1280 1281 if (send_frame) { 1282 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1283 IEEE80211_DEAUTH_FRAME_LEN); 1284 if (!skb) 1285 return; 1286 1287 skb_reserve(skb, local->hw.extra_tx_headroom); 1288 1289 /* copy in frame */ 1290 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), 1291 mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1292 1293 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1294 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1295 IEEE80211_SKB_CB(skb)->flags |= 1296 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1297 1298 ieee80211_tx_skb(sdata, skb); 1299 } 1300 } 1301 1302 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1303 u8 *buffer, size_t buffer_len, 1304 const u8 *ie, size_t ie_len, 1305 enum nl80211_band band, 1306 u32 rate_mask, 1307 struct cfg80211_chan_def *chandef, 1308 size_t *offset) 1309 { 1310 struct ieee80211_supported_band *sband; 1311 u8 *pos = buffer, *end = buffer + buffer_len; 1312 size_t noffset; 1313 int supp_rates_len, i; 1314 u8 rates[32]; 1315 int num_rates; 1316 int ext_rates_len; 1317 int shift; 1318 u32 rate_flags; 1319 bool have_80mhz = false; 1320 1321 *offset = 0; 1322 1323 sband = local->hw.wiphy->bands[band]; 1324 if (WARN_ON_ONCE(!sband)) 1325 return 0; 1326 1327 rate_flags = ieee80211_chandef_rate_flags(chandef); 1328 shift = ieee80211_chandef_get_shift(chandef); 1329 1330 num_rates = 0; 1331 for (i = 0; i < sband->n_bitrates; i++) { 1332 if ((BIT(i) & rate_mask) == 0) 1333 continue; /* skip rate */ 1334 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1335 continue; 1336 1337 rates[num_rates++] = 1338 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1339 (1 << shift) * 5); 1340 } 1341 1342 supp_rates_len = min_t(int, num_rates, 8); 1343 1344 if (end - pos < 2 + supp_rates_len) 1345 goto out_err; 1346 *pos++ = WLAN_EID_SUPP_RATES; 1347 *pos++ = supp_rates_len; 1348 memcpy(pos, rates, supp_rates_len); 1349 pos += supp_rates_len; 1350 1351 /* insert "request information" if in custom IEs */ 1352 if (ie && ie_len) { 1353 static const u8 before_extrates[] = { 1354 WLAN_EID_SSID, 1355 WLAN_EID_SUPP_RATES, 1356 WLAN_EID_REQUEST, 1357 }; 1358 noffset = ieee80211_ie_split(ie, ie_len, 1359 before_extrates, 1360 ARRAY_SIZE(before_extrates), 1361 *offset); 1362 if (end - pos < noffset - *offset) 1363 goto out_err; 1364 memcpy(pos, ie + *offset, noffset - *offset); 1365 pos += noffset - *offset; 1366 *offset = noffset; 1367 } 1368 1369 ext_rates_len = num_rates - supp_rates_len; 1370 if (ext_rates_len > 0) { 1371 if (end - pos < 2 + ext_rates_len) 1372 goto out_err; 1373 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1374 *pos++ = ext_rates_len; 1375 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1376 pos += ext_rates_len; 1377 } 1378 1379 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1380 if (end - pos < 3) 1381 goto out_err; 1382 *pos++ = WLAN_EID_DS_PARAMS; 1383 *pos++ = 1; 1384 *pos++ = ieee80211_frequency_to_channel( 1385 chandef->chan->center_freq); 1386 } 1387 1388 /* insert custom IEs that go before HT */ 1389 if (ie && ie_len) { 1390 static const u8 before_ht[] = { 1391 WLAN_EID_SSID, 1392 WLAN_EID_SUPP_RATES, 1393 WLAN_EID_REQUEST, 1394 WLAN_EID_EXT_SUPP_RATES, 1395 WLAN_EID_DS_PARAMS, 1396 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1397 }; 1398 noffset = ieee80211_ie_split(ie, ie_len, 1399 before_ht, ARRAY_SIZE(before_ht), 1400 *offset); 1401 if (end - pos < noffset - *offset) 1402 goto out_err; 1403 memcpy(pos, ie + *offset, noffset - *offset); 1404 pos += noffset - *offset; 1405 *offset = noffset; 1406 } 1407 1408 if (sband->ht_cap.ht_supported) { 1409 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1410 goto out_err; 1411 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1412 sband->ht_cap.cap); 1413 } 1414 1415 /* 1416 * If adding more here, adjust code in main.c 1417 * that calculates local->scan_ies_len. 1418 */ 1419 1420 /* insert custom IEs that go before VHT */ 1421 if (ie && ie_len) { 1422 static const u8 before_vht[] = { 1423 WLAN_EID_SSID, 1424 WLAN_EID_SUPP_RATES, 1425 WLAN_EID_REQUEST, 1426 WLAN_EID_EXT_SUPP_RATES, 1427 WLAN_EID_DS_PARAMS, 1428 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1429 WLAN_EID_HT_CAPABILITY, 1430 WLAN_EID_BSS_COEX_2040, 1431 WLAN_EID_EXT_CAPABILITY, 1432 WLAN_EID_SSID_LIST, 1433 WLAN_EID_CHANNEL_USAGE, 1434 WLAN_EID_INTERWORKING, 1435 /* mesh ID can't happen here */ 1436 /* 60 GHz can't happen here right now */ 1437 }; 1438 noffset = ieee80211_ie_split(ie, ie_len, 1439 before_vht, ARRAY_SIZE(before_vht), 1440 *offset); 1441 if (end - pos < noffset - *offset) 1442 goto out_err; 1443 memcpy(pos, ie + *offset, noffset - *offset); 1444 pos += noffset - *offset; 1445 *offset = noffset; 1446 } 1447 1448 /* Check if any channel in this sband supports at least 80 MHz */ 1449 for (i = 0; i < sband->n_channels; i++) { 1450 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1451 IEEE80211_CHAN_NO_80MHZ)) 1452 continue; 1453 1454 have_80mhz = true; 1455 break; 1456 } 1457 1458 if (sband->vht_cap.vht_supported && have_80mhz) { 1459 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1460 goto out_err; 1461 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1462 sband->vht_cap.cap); 1463 } 1464 1465 return pos - buffer; 1466 out_err: 1467 WARN_ONCE(1, "not enough space for preq IEs\n"); 1468 return pos - buffer; 1469 } 1470 1471 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1472 size_t buffer_len, 1473 struct ieee80211_scan_ies *ie_desc, 1474 const u8 *ie, size_t ie_len, 1475 u8 bands_used, u32 *rate_masks, 1476 struct cfg80211_chan_def *chandef) 1477 { 1478 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1479 int i; 1480 1481 memset(ie_desc, 0, sizeof(*ie_desc)); 1482 1483 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1484 if (bands_used & BIT(i)) { 1485 pos += ieee80211_build_preq_ies_band(local, 1486 buffer + pos, 1487 buffer_len - pos, 1488 ie, ie_len, i, 1489 rate_masks[i], 1490 chandef, 1491 &custom_ie_offset); 1492 ie_desc->ies[i] = buffer + old_pos; 1493 ie_desc->len[i] = pos - old_pos; 1494 old_pos = pos; 1495 } 1496 } 1497 1498 /* add any remaining custom IEs */ 1499 if (ie && ie_len) { 1500 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1501 "not enough space for preq custom IEs\n")) 1502 return pos; 1503 memcpy(buffer + pos, ie + custom_ie_offset, 1504 ie_len - custom_ie_offset); 1505 ie_desc->common_ies = buffer + pos; 1506 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1507 pos += ie_len - custom_ie_offset; 1508 } 1509 1510 return pos; 1511 }; 1512 1513 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1514 const u8 *src, const u8 *dst, 1515 u32 ratemask, 1516 struct ieee80211_channel *chan, 1517 const u8 *ssid, size_t ssid_len, 1518 const u8 *ie, size_t ie_len, 1519 bool directed) 1520 { 1521 struct ieee80211_local *local = sdata->local; 1522 struct cfg80211_chan_def chandef; 1523 struct sk_buff *skb; 1524 struct ieee80211_mgmt *mgmt; 1525 int ies_len; 1526 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1527 struct ieee80211_scan_ies dummy_ie_desc; 1528 1529 /* 1530 * Do not send DS Channel parameter for directed probe requests 1531 * in order to maximize the chance that we get a response. Some 1532 * badly-behaved APs don't respond when this parameter is included. 1533 */ 1534 chandef.width = sdata->vif.bss_conf.chandef.width; 1535 if (directed) 1536 chandef.chan = NULL; 1537 else 1538 chandef.chan = chan; 1539 1540 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1541 100 + ie_len); 1542 if (!skb) 1543 return NULL; 1544 1545 rate_masks[chan->band] = ratemask; 1546 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1547 skb_tailroom(skb), &dummy_ie_desc, 1548 ie, ie_len, BIT(chan->band), 1549 rate_masks, &chandef); 1550 skb_put(skb, ies_len); 1551 1552 if (dst) { 1553 mgmt = (struct ieee80211_mgmt *) skb->data; 1554 memcpy(mgmt->da, dst, ETH_ALEN); 1555 memcpy(mgmt->bssid, dst, ETH_ALEN); 1556 } 1557 1558 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1559 1560 return skb; 1561 } 1562 1563 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, 1564 const u8 *src, const u8 *dst, 1565 const u8 *ssid, size_t ssid_len, 1566 const u8 *ie, size_t ie_len, 1567 u32 ratemask, bool directed, u32 tx_flags, 1568 struct ieee80211_channel *channel, bool scan) 1569 { 1570 struct sk_buff *skb; 1571 1572 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, 1573 ssid, ssid_len, 1574 ie, ie_len, directed); 1575 if (skb) { 1576 IEEE80211_SKB_CB(skb)->flags |= tx_flags; 1577 if (scan) 1578 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); 1579 else 1580 ieee80211_tx_skb(sdata, skb); 1581 } 1582 } 1583 1584 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1585 struct ieee802_11_elems *elems, 1586 enum nl80211_band band, u32 *basic_rates) 1587 { 1588 struct ieee80211_supported_band *sband; 1589 size_t num_rates; 1590 u32 supp_rates, rate_flags; 1591 int i, j, shift; 1592 sband = sdata->local->hw.wiphy->bands[band]; 1593 1594 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1595 shift = ieee80211_vif_get_shift(&sdata->vif); 1596 1597 if (WARN_ON(!sband)) 1598 return 1; 1599 1600 num_rates = sband->n_bitrates; 1601 supp_rates = 0; 1602 for (i = 0; i < elems->supp_rates_len + 1603 elems->ext_supp_rates_len; i++) { 1604 u8 rate = 0; 1605 int own_rate; 1606 bool is_basic; 1607 if (i < elems->supp_rates_len) 1608 rate = elems->supp_rates[i]; 1609 else if (elems->ext_supp_rates) 1610 rate = elems->ext_supp_rates 1611 [i - elems->supp_rates_len]; 1612 own_rate = 5 * (rate & 0x7f); 1613 is_basic = !!(rate & 0x80); 1614 1615 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1616 continue; 1617 1618 for (j = 0; j < num_rates; j++) { 1619 int brate; 1620 if ((rate_flags & sband->bitrates[j].flags) 1621 != rate_flags) 1622 continue; 1623 1624 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1625 1 << shift); 1626 1627 if (brate == own_rate) { 1628 supp_rates |= BIT(j); 1629 if (basic_rates && is_basic) 1630 *basic_rates |= BIT(j); 1631 } 1632 } 1633 } 1634 return supp_rates; 1635 } 1636 1637 void ieee80211_stop_device(struct ieee80211_local *local) 1638 { 1639 ieee80211_led_radio(local, false); 1640 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1641 1642 cancel_work_sync(&local->reconfig_filter); 1643 1644 flush_workqueue(local->workqueue); 1645 drv_stop(local); 1646 } 1647 1648 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1649 bool aborted) 1650 { 1651 /* It's possible that we don't handle the scan completion in 1652 * time during suspend, so if it's still marked as completed 1653 * here, queue the work and flush it to clean things up. 1654 * Instead of calling the worker function directly here, we 1655 * really queue it to avoid potential races with other flows 1656 * scheduling the same work. 1657 */ 1658 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1659 /* If coming from reconfiguration failure, abort the scan so 1660 * we don't attempt to continue a partial HW scan - which is 1661 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1662 * completed scan, and a 5 GHz portion is still pending. 1663 */ 1664 if (aborted) 1665 set_bit(SCAN_ABORTED, &local->scanning); 1666 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 1667 flush_delayed_work(&local->scan_work); 1668 } 1669 } 1670 1671 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1672 { 1673 struct ieee80211_sub_if_data *sdata; 1674 struct ieee80211_chanctx *ctx; 1675 1676 /* 1677 * We get here if during resume the device can't be restarted properly. 1678 * We might also get here if this happens during HW reset, which is a 1679 * slightly different situation and we need to drop all connections in 1680 * the latter case. 1681 * 1682 * Ask cfg80211 to turn off all interfaces, this will result in more 1683 * warnings but at least we'll then get into a clean stopped state. 1684 */ 1685 1686 local->resuming = false; 1687 local->suspended = false; 1688 local->in_reconfig = false; 1689 1690 ieee80211_flush_completed_scan(local, true); 1691 1692 /* scheduled scan clearly can't be running any more, but tell 1693 * cfg80211 and clear local state 1694 */ 1695 ieee80211_sched_scan_end(local); 1696 1697 list_for_each_entry(sdata, &local->interfaces, list) 1698 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1699 1700 /* Mark channel contexts as not being in the driver any more to avoid 1701 * removing them from the driver during the shutdown process... 1702 */ 1703 mutex_lock(&local->chanctx_mtx); 1704 list_for_each_entry(ctx, &local->chanctx_list, list) 1705 ctx->driver_present = false; 1706 mutex_unlock(&local->chanctx_mtx); 1707 1708 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1709 } 1710 1711 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1712 struct ieee80211_sub_if_data *sdata) 1713 { 1714 struct ieee80211_chanctx_conf *conf; 1715 struct ieee80211_chanctx *ctx; 1716 1717 if (!local->use_chanctx) 1718 return; 1719 1720 mutex_lock(&local->chanctx_mtx); 1721 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1722 lockdep_is_held(&local->chanctx_mtx)); 1723 if (conf) { 1724 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1725 drv_assign_vif_chanctx(local, sdata, ctx); 1726 } 1727 mutex_unlock(&local->chanctx_mtx); 1728 } 1729 1730 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 1731 { 1732 struct ieee80211_local *local = sdata->local; 1733 struct sta_info *sta; 1734 1735 /* add STAs back */ 1736 mutex_lock(&local->sta_mtx); 1737 list_for_each_entry(sta, &local->sta_list, list) { 1738 enum ieee80211_sta_state state; 1739 1740 if (!sta->uploaded || sta->sdata != sdata) 1741 continue; 1742 1743 for (state = IEEE80211_STA_NOTEXIST; 1744 state < sta->sta_state; state++) 1745 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1746 state + 1)); 1747 } 1748 mutex_unlock(&local->sta_mtx); 1749 } 1750 1751 int ieee80211_reconfig(struct ieee80211_local *local) 1752 { 1753 struct ieee80211_hw *hw = &local->hw; 1754 struct ieee80211_sub_if_data *sdata; 1755 struct ieee80211_chanctx *ctx; 1756 struct sta_info *sta; 1757 int res, i; 1758 bool reconfig_due_to_wowlan = false; 1759 struct ieee80211_sub_if_data *sched_scan_sdata; 1760 struct cfg80211_sched_scan_request *sched_scan_req; 1761 bool sched_scan_stopped = false; 1762 bool suspended = local->suspended; 1763 1764 /* nothing to do if HW shouldn't run */ 1765 if (!local->open_count) 1766 goto wake_up; 1767 1768 #ifdef CONFIG_PM 1769 if (suspended) 1770 local->resuming = true; 1771 1772 if (local->wowlan) { 1773 /* 1774 * In the wowlan case, both mac80211 and the device 1775 * are functional when the resume op is called, so 1776 * clear local->suspended so the device could operate 1777 * normally (e.g. pass rx frames). 1778 */ 1779 local->suspended = false; 1780 res = drv_resume(local); 1781 local->wowlan = false; 1782 if (res < 0) { 1783 local->resuming = false; 1784 return res; 1785 } 1786 if (res == 0) 1787 goto wake_up; 1788 WARN_ON(res > 1); 1789 /* 1790 * res is 1, which means the driver requested 1791 * to go through a regular reset on wakeup. 1792 * restore local->suspended in this case. 1793 */ 1794 reconfig_due_to_wowlan = true; 1795 local->suspended = true; 1796 } 1797 #endif 1798 1799 /* 1800 * In case of hw_restart during suspend (without wowlan), 1801 * cancel restart work, as we are reconfiguring the device 1802 * anyway. 1803 * Note that restart_work is scheduled on a frozen workqueue, 1804 * so we can't deadlock in this case. 1805 */ 1806 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 1807 cancel_work_sync(&local->restart_work); 1808 1809 local->started = false; 1810 1811 /* 1812 * Upon resume hardware can sometimes be goofy due to 1813 * various platform / driver / bus issues, so restarting 1814 * the device may at times not work immediately. Propagate 1815 * the error. 1816 */ 1817 res = drv_start(local); 1818 if (res) { 1819 if (suspended) 1820 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1821 else 1822 WARN(1, "Hardware became unavailable during restart.\n"); 1823 ieee80211_handle_reconfig_failure(local); 1824 return res; 1825 } 1826 1827 /* setup fragmentation threshold */ 1828 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1829 1830 /* setup RTS threshold */ 1831 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1832 1833 /* reset coverage class */ 1834 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1835 1836 ieee80211_led_radio(local, true); 1837 ieee80211_mod_tpt_led_trig(local, 1838 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1839 1840 /* add interfaces */ 1841 sdata = rtnl_dereference(local->monitor_sdata); 1842 if (sdata) { 1843 /* in HW restart it exists already */ 1844 WARN_ON(local->resuming); 1845 res = drv_add_interface(local, sdata); 1846 if (WARN_ON(res)) { 1847 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1848 synchronize_net(); 1849 kfree(sdata); 1850 } 1851 } 1852 1853 list_for_each_entry(sdata, &local->interfaces, list) { 1854 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1855 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1856 ieee80211_sdata_running(sdata)) { 1857 res = drv_add_interface(local, sdata); 1858 if (WARN_ON(res)) 1859 break; 1860 } 1861 } 1862 1863 /* If adding any of the interfaces failed above, roll back and 1864 * report failure. 1865 */ 1866 if (res) { 1867 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 1868 list) 1869 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1870 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1871 ieee80211_sdata_running(sdata)) 1872 drv_remove_interface(local, sdata); 1873 ieee80211_handle_reconfig_failure(local); 1874 return res; 1875 } 1876 1877 /* add channel contexts */ 1878 if (local->use_chanctx) { 1879 mutex_lock(&local->chanctx_mtx); 1880 list_for_each_entry(ctx, &local->chanctx_list, list) 1881 if (ctx->replace_state != 1882 IEEE80211_CHANCTX_REPLACES_OTHER) 1883 WARN_ON(drv_add_chanctx(local, ctx)); 1884 mutex_unlock(&local->chanctx_mtx); 1885 1886 sdata = rtnl_dereference(local->monitor_sdata); 1887 if (sdata && ieee80211_sdata_running(sdata)) 1888 ieee80211_assign_chanctx(local, sdata); 1889 } 1890 1891 /* reconfigure hardware */ 1892 ieee80211_hw_config(local, ~0); 1893 1894 ieee80211_configure_filter(local); 1895 1896 /* Finally also reconfigure all the BSS information */ 1897 list_for_each_entry(sdata, &local->interfaces, list) { 1898 u32 changed; 1899 1900 if (!ieee80211_sdata_running(sdata)) 1901 continue; 1902 1903 ieee80211_assign_chanctx(local, sdata); 1904 1905 switch (sdata->vif.type) { 1906 case NL80211_IFTYPE_AP_VLAN: 1907 case NL80211_IFTYPE_MONITOR: 1908 break; 1909 default: 1910 ieee80211_reconfig_stations(sdata); 1911 /* fall through */ 1912 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 1913 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1914 drv_conf_tx(local, sdata, i, 1915 &sdata->tx_conf[i]); 1916 break; 1917 } 1918 1919 /* common change flags for all interface types */ 1920 changed = BSS_CHANGED_ERP_CTS_PROT | 1921 BSS_CHANGED_ERP_PREAMBLE | 1922 BSS_CHANGED_ERP_SLOT | 1923 BSS_CHANGED_HT | 1924 BSS_CHANGED_BASIC_RATES | 1925 BSS_CHANGED_BEACON_INT | 1926 BSS_CHANGED_BSSID | 1927 BSS_CHANGED_CQM | 1928 BSS_CHANGED_QOS | 1929 BSS_CHANGED_IDLE | 1930 BSS_CHANGED_TXPOWER; 1931 1932 if (sdata->vif.mu_mimo_owner) 1933 changed |= BSS_CHANGED_MU_GROUPS; 1934 1935 switch (sdata->vif.type) { 1936 case NL80211_IFTYPE_STATION: 1937 changed |= BSS_CHANGED_ASSOC | 1938 BSS_CHANGED_ARP_FILTER | 1939 BSS_CHANGED_PS; 1940 1941 /* Re-send beacon info report to the driver */ 1942 if (sdata->u.mgd.have_beacon) 1943 changed |= BSS_CHANGED_BEACON_INFO; 1944 1945 sdata_lock(sdata); 1946 ieee80211_bss_info_change_notify(sdata, changed); 1947 sdata_unlock(sdata); 1948 break; 1949 case NL80211_IFTYPE_OCB: 1950 changed |= BSS_CHANGED_OCB; 1951 ieee80211_bss_info_change_notify(sdata, changed); 1952 break; 1953 case NL80211_IFTYPE_ADHOC: 1954 changed |= BSS_CHANGED_IBSS; 1955 /* fall through */ 1956 case NL80211_IFTYPE_AP: 1957 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 1958 1959 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1960 changed |= BSS_CHANGED_AP_PROBE_RESP; 1961 1962 if (rcu_access_pointer(sdata->u.ap.beacon)) 1963 drv_start_ap(local, sdata); 1964 } 1965 1966 /* fall through */ 1967 case NL80211_IFTYPE_MESH_POINT: 1968 if (sdata->vif.bss_conf.enable_beacon) { 1969 changed |= BSS_CHANGED_BEACON | 1970 BSS_CHANGED_BEACON_ENABLED; 1971 ieee80211_bss_info_change_notify(sdata, changed); 1972 } 1973 break; 1974 case NL80211_IFTYPE_WDS: 1975 case NL80211_IFTYPE_AP_VLAN: 1976 case NL80211_IFTYPE_MONITOR: 1977 case NL80211_IFTYPE_P2P_DEVICE: 1978 /* nothing to do */ 1979 break; 1980 case NL80211_IFTYPE_UNSPECIFIED: 1981 case NUM_NL80211_IFTYPES: 1982 case NL80211_IFTYPE_P2P_CLIENT: 1983 case NL80211_IFTYPE_P2P_GO: 1984 WARN_ON(1); 1985 break; 1986 } 1987 } 1988 1989 ieee80211_recalc_ps(local); 1990 1991 /* 1992 * The sta might be in psm against the ap (e.g. because 1993 * this was the state before a hw restart), so we 1994 * explicitly send a null packet in order to make sure 1995 * it'll sync against the ap (and get out of psm). 1996 */ 1997 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 1998 list_for_each_entry(sdata, &local->interfaces, list) { 1999 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2000 continue; 2001 if (!sdata->u.mgd.associated) 2002 continue; 2003 2004 ieee80211_send_nullfunc(local, sdata, false); 2005 } 2006 } 2007 2008 /* APs are now beaconing, add back stations */ 2009 mutex_lock(&local->sta_mtx); 2010 list_for_each_entry(sta, &local->sta_list, list) { 2011 enum ieee80211_sta_state state; 2012 2013 if (!sta->uploaded) 2014 continue; 2015 2016 if (sta->sdata->vif.type != NL80211_IFTYPE_AP) 2017 continue; 2018 2019 for (state = IEEE80211_STA_NOTEXIST; 2020 state < sta->sta_state; state++) 2021 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2022 state + 1)); 2023 } 2024 mutex_unlock(&local->sta_mtx); 2025 2026 /* add back keys */ 2027 list_for_each_entry(sdata, &local->interfaces, list) 2028 ieee80211_reset_crypto_tx_tailroom(sdata); 2029 2030 list_for_each_entry(sdata, &local->interfaces, list) 2031 if (ieee80211_sdata_running(sdata)) 2032 ieee80211_enable_keys(sdata); 2033 2034 /* Reconfigure sched scan if it was interrupted by FW restart */ 2035 mutex_lock(&local->mtx); 2036 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2037 lockdep_is_held(&local->mtx)); 2038 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2039 lockdep_is_held(&local->mtx)); 2040 if (sched_scan_sdata && sched_scan_req) 2041 /* 2042 * Sched scan stopped, but we don't want to report it. Instead, 2043 * we're trying to reschedule. However, if more than one scan 2044 * plan was set, we cannot reschedule since we don't know which 2045 * scan plan was currently running (and some scan plans may have 2046 * already finished). 2047 */ 2048 if (sched_scan_req->n_scan_plans > 1 || 2049 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2050 sched_scan_req)) { 2051 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2052 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2053 sched_scan_stopped = true; 2054 } 2055 mutex_unlock(&local->mtx); 2056 2057 if (sched_scan_stopped) 2058 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy); 2059 2060 wake_up: 2061 if (local->in_reconfig) { 2062 local->in_reconfig = false; 2063 barrier(); 2064 2065 /* Restart deferred ROCs */ 2066 mutex_lock(&local->mtx); 2067 ieee80211_start_next_roc(local); 2068 mutex_unlock(&local->mtx); 2069 } 2070 2071 if (local->monitors == local->open_count && local->monitors > 0) 2072 ieee80211_add_virtual_monitor(local); 2073 2074 /* 2075 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2076 * sessions can be established after a resume. 2077 * 2078 * Also tear down aggregation sessions since reconfiguring 2079 * them in a hardware restart scenario is not easily done 2080 * right now, and the hardware will have lost information 2081 * about the sessions, but we and the AP still think they 2082 * are active. This is really a workaround though. 2083 */ 2084 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2085 mutex_lock(&local->sta_mtx); 2086 2087 list_for_each_entry(sta, &local->sta_list, list) { 2088 if (!local->resuming) 2089 ieee80211_sta_tear_down_BA_sessions( 2090 sta, AGG_STOP_LOCAL_REQUEST); 2091 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2092 } 2093 2094 mutex_unlock(&local->sta_mtx); 2095 } 2096 2097 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2098 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2099 false); 2100 2101 /* 2102 * If this is for hw restart things are still running. 2103 * We may want to change that later, however. 2104 */ 2105 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2106 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2107 2108 if (!suspended) 2109 return 0; 2110 2111 #ifdef CONFIG_PM 2112 /* first set suspended false, then resuming */ 2113 local->suspended = false; 2114 mb(); 2115 local->resuming = false; 2116 2117 ieee80211_flush_completed_scan(local, false); 2118 2119 if (local->open_count && !reconfig_due_to_wowlan) 2120 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2121 2122 list_for_each_entry(sdata, &local->interfaces, list) { 2123 if (!ieee80211_sdata_running(sdata)) 2124 continue; 2125 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2126 ieee80211_sta_restart(sdata); 2127 } 2128 2129 mod_timer(&local->sta_cleanup, jiffies + 1); 2130 #else 2131 WARN_ON(1); 2132 #endif 2133 2134 return 0; 2135 } 2136 2137 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2138 { 2139 struct ieee80211_sub_if_data *sdata; 2140 struct ieee80211_local *local; 2141 struct ieee80211_key *key; 2142 2143 if (WARN_ON(!vif)) 2144 return; 2145 2146 sdata = vif_to_sdata(vif); 2147 local = sdata->local; 2148 2149 if (WARN_ON(!local->resuming)) 2150 return; 2151 2152 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2153 return; 2154 2155 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2156 2157 mutex_lock(&local->key_mtx); 2158 list_for_each_entry(key, &sdata->key_list, list) 2159 key->flags |= KEY_FLAG_TAINTED; 2160 mutex_unlock(&local->key_mtx); 2161 } 2162 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2163 2164 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2165 { 2166 struct ieee80211_local *local = sdata->local; 2167 struct ieee80211_chanctx_conf *chanctx_conf; 2168 struct ieee80211_chanctx *chanctx; 2169 2170 mutex_lock(&local->chanctx_mtx); 2171 2172 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2173 lockdep_is_held(&local->chanctx_mtx)); 2174 2175 /* 2176 * This function can be called from a work, thus it may be possible 2177 * that the chanctx_conf is removed (due to a disconnection, for 2178 * example). 2179 * So nothing should be done in such case. 2180 */ 2181 if (!chanctx_conf) 2182 goto unlock; 2183 2184 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2185 ieee80211_recalc_smps_chanctx(local, chanctx); 2186 unlock: 2187 mutex_unlock(&local->chanctx_mtx); 2188 } 2189 2190 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2191 { 2192 struct ieee80211_local *local = sdata->local; 2193 struct ieee80211_chanctx_conf *chanctx_conf; 2194 struct ieee80211_chanctx *chanctx; 2195 2196 mutex_lock(&local->chanctx_mtx); 2197 2198 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2199 lockdep_is_held(&local->chanctx_mtx)); 2200 2201 if (WARN_ON_ONCE(!chanctx_conf)) 2202 goto unlock; 2203 2204 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2205 ieee80211_recalc_chanctx_min_def(local, chanctx); 2206 unlock: 2207 mutex_unlock(&local->chanctx_mtx); 2208 } 2209 2210 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2211 { 2212 size_t pos = offset; 2213 2214 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2215 pos += 2 + ies[pos + 1]; 2216 2217 return pos; 2218 } 2219 2220 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2221 int rssi_min_thold, 2222 int rssi_max_thold) 2223 { 2224 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2225 2226 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2227 return; 2228 2229 /* 2230 * Scale up threshold values before storing it, as the RSSI averaging 2231 * algorithm uses a scaled up value as well. Change this scaling 2232 * factor if the RSSI averaging algorithm changes. 2233 */ 2234 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2235 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2236 } 2237 2238 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2239 int rssi_min_thold, 2240 int rssi_max_thold) 2241 { 2242 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2243 2244 WARN_ON(rssi_min_thold == rssi_max_thold || 2245 rssi_min_thold > rssi_max_thold); 2246 2247 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2248 rssi_max_thold); 2249 } 2250 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2251 2252 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2253 { 2254 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2255 2256 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2257 } 2258 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2259 2260 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2261 u16 cap) 2262 { 2263 __le16 tmp; 2264 2265 *pos++ = WLAN_EID_HT_CAPABILITY; 2266 *pos++ = sizeof(struct ieee80211_ht_cap); 2267 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2268 2269 /* capability flags */ 2270 tmp = cpu_to_le16(cap); 2271 memcpy(pos, &tmp, sizeof(u16)); 2272 pos += sizeof(u16); 2273 2274 /* AMPDU parameters */ 2275 *pos++ = ht_cap->ampdu_factor | 2276 (ht_cap->ampdu_density << 2277 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2278 2279 /* MCS set */ 2280 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2281 pos += sizeof(ht_cap->mcs); 2282 2283 /* extended capabilities */ 2284 pos += sizeof(__le16); 2285 2286 /* BF capabilities */ 2287 pos += sizeof(__le32); 2288 2289 /* antenna selection */ 2290 pos += sizeof(u8); 2291 2292 return pos; 2293 } 2294 2295 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2296 u32 cap) 2297 { 2298 __le32 tmp; 2299 2300 *pos++ = WLAN_EID_VHT_CAPABILITY; 2301 *pos++ = sizeof(struct ieee80211_vht_cap); 2302 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2303 2304 /* capability flags */ 2305 tmp = cpu_to_le32(cap); 2306 memcpy(pos, &tmp, sizeof(u32)); 2307 pos += sizeof(u32); 2308 2309 /* VHT MCS set */ 2310 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2311 pos += sizeof(vht_cap->vht_mcs); 2312 2313 return pos; 2314 } 2315 2316 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2317 const struct cfg80211_chan_def *chandef, 2318 u16 prot_mode, bool rifs_mode) 2319 { 2320 struct ieee80211_ht_operation *ht_oper; 2321 /* Build HT Information */ 2322 *pos++ = WLAN_EID_HT_OPERATION; 2323 *pos++ = sizeof(struct ieee80211_ht_operation); 2324 ht_oper = (struct ieee80211_ht_operation *)pos; 2325 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2326 chandef->chan->center_freq); 2327 switch (chandef->width) { 2328 case NL80211_CHAN_WIDTH_160: 2329 case NL80211_CHAN_WIDTH_80P80: 2330 case NL80211_CHAN_WIDTH_80: 2331 case NL80211_CHAN_WIDTH_40: 2332 if (chandef->center_freq1 > chandef->chan->center_freq) 2333 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2334 else 2335 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2336 break; 2337 default: 2338 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2339 break; 2340 } 2341 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2342 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2343 chandef->width != NL80211_CHAN_WIDTH_20) 2344 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2345 2346 if (rifs_mode) 2347 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2348 2349 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2350 ht_oper->stbc_param = 0x0000; 2351 2352 /* It seems that Basic MCS set and Supported MCS set 2353 are identical for the first 10 bytes */ 2354 memset(&ht_oper->basic_set, 0, 16); 2355 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2356 2357 return pos + sizeof(struct ieee80211_ht_operation); 2358 } 2359 2360 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2361 const struct cfg80211_chan_def *chandef) 2362 { 2363 struct ieee80211_vht_operation *vht_oper; 2364 2365 *pos++ = WLAN_EID_VHT_OPERATION; 2366 *pos++ = sizeof(struct ieee80211_vht_operation); 2367 vht_oper = (struct ieee80211_vht_operation *)pos; 2368 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel( 2369 chandef->center_freq1); 2370 if (chandef->center_freq2) 2371 vht_oper->center_freq_seg2_idx = 2372 ieee80211_frequency_to_channel(chandef->center_freq2); 2373 else 2374 vht_oper->center_freq_seg2_idx = 0x00; 2375 2376 switch (chandef->width) { 2377 case NL80211_CHAN_WIDTH_160: 2378 /* 2379 * Convert 160 MHz channel width to new style as interop 2380 * workaround. 2381 */ 2382 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2383 vht_oper->center_freq_seg2_idx = vht_oper->center_freq_seg1_idx; 2384 if (chandef->chan->center_freq < chandef->center_freq1) 2385 vht_oper->center_freq_seg1_idx -= 8; 2386 else 2387 vht_oper->center_freq_seg1_idx += 8; 2388 break; 2389 case NL80211_CHAN_WIDTH_80P80: 2390 /* 2391 * Convert 80+80 MHz channel width to new style as interop 2392 * workaround. 2393 */ 2394 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2395 break; 2396 case NL80211_CHAN_WIDTH_80: 2397 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2398 break; 2399 default: 2400 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2401 break; 2402 } 2403 2404 /* don't require special VHT peer rates */ 2405 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2406 2407 return pos + sizeof(struct ieee80211_vht_operation); 2408 } 2409 2410 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2411 struct cfg80211_chan_def *chandef) 2412 { 2413 enum nl80211_channel_type channel_type; 2414 2415 if (!ht_oper) 2416 return false; 2417 2418 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2419 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2420 channel_type = NL80211_CHAN_HT20; 2421 break; 2422 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2423 channel_type = NL80211_CHAN_HT40PLUS; 2424 break; 2425 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2426 channel_type = NL80211_CHAN_HT40MINUS; 2427 break; 2428 default: 2429 channel_type = NL80211_CHAN_NO_HT; 2430 return false; 2431 } 2432 2433 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2434 return true; 2435 } 2436 2437 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper, 2438 struct cfg80211_chan_def *chandef) 2439 { 2440 struct cfg80211_chan_def new = *chandef; 2441 int cf1, cf2; 2442 2443 if (!oper) 2444 return false; 2445 2446 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, 2447 chandef->chan->band); 2448 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx, 2449 chandef->chan->band); 2450 2451 switch (oper->chan_width) { 2452 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2453 break; 2454 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2455 new.width = NL80211_CHAN_WIDTH_80; 2456 new.center_freq1 = cf1; 2457 /* If needed, adjust based on the newer interop workaround. */ 2458 if (oper->center_freq_seg2_idx) { 2459 unsigned int diff; 2460 2461 diff = abs(oper->center_freq_seg2_idx - 2462 oper->center_freq_seg1_idx); 2463 if (diff == 8) { 2464 new.width = NL80211_CHAN_WIDTH_160; 2465 new.center_freq1 = cf2; 2466 } else if (diff > 8) { 2467 new.width = NL80211_CHAN_WIDTH_80P80; 2468 new.center_freq2 = cf2; 2469 } 2470 } 2471 break; 2472 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2473 new.width = NL80211_CHAN_WIDTH_160; 2474 new.center_freq1 = cf1; 2475 break; 2476 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2477 new.width = NL80211_CHAN_WIDTH_80P80; 2478 new.center_freq1 = cf1; 2479 new.center_freq2 = cf2; 2480 break; 2481 default: 2482 return false; 2483 } 2484 2485 if (!cfg80211_chandef_valid(&new)) 2486 return false; 2487 2488 *chandef = new; 2489 return true; 2490 } 2491 2492 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2493 const struct ieee80211_supported_band *sband, 2494 const u8 *srates, int srates_len, u32 *rates) 2495 { 2496 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2497 int shift = ieee80211_chandef_get_shift(chandef); 2498 struct ieee80211_rate *br; 2499 int brate, rate, i, j, count = 0; 2500 2501 *rates = 0; 2502 2503 for (i = 0; i < srates_len; i++) { 2504 rate = srates[i] & 0x7f; 2505 2506 for (j = 0; j < sband->n_bitrates; j++) { 2507 br = &sband->bitrates[j]; 2508 if ((rate_flags & br->flags) != rate_flags) 2509 continue; 2510 2511 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2512 if (brate == rate) { 2513 *rates |= BIT(j); 2514 count++; 2515 break; 2516 } 2517 } 2518 } 2519 return count; 2520 } 2521 2522 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2523 struct sk_buff *skb, bool need_basic, 2524 enum nl80211_band band) 2525 { 2526 struct ieee80211_local *local = sdata->local; 2527 struct ieee80211_supported_band *sband; 2528 int rate, shift; 2529 u8 i, rates, *pos; 2530 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2531 u32 rate_flags; 2532 2533 shift = ieee80211_vif_get_shift(&sdata->vif); 2534 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2535 sband = local->hw.wiphy->bands[band]; 2536 rates = 0; 2537 for (i = 0; i < sband->n_bitrates; i++) { 2538 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2539 continue; 2540 rates++; 2541 } 2542 if (rates > 8) 2543 rates = 8; 2544 2545 if (skb_tailroom(skb) < rates + 2) 2546 return -ENOMEM; 2547 2548 pos = skb_put(skb, rates + 2); 2549 *pos++ = WLAN_EID_SUPP_RATES; 2550 *pos++ = rates; 2551 for (i = 0; i < rates; i++) { 2552 u8 basic = 0; 2553 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2554 continue; 2555 2556 if (need_basic && basic_rates & BIT(i)) 2557 basic = 0x80; 2558 rate = sband->bitrates[i].bitrate; 2559 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2560 5 * (1 << shift)); 2561 *pos++ = basic | (u8) rate; 2562 } 2563 2564 return 0; 2565 } 2566 2567 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2568 struct sk_buff *skb, bool need_basic, 2569 enum nl80211_band band) 2570 { 2571 struct ieee80211_local *local = sdata->local; 2572 struct ieee80211_supported_band *sband; 2573 int rate, shift; 2574 u8 i, exrates, *pos; 2575 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2576 u32 rate_flags; 2577 2578 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2579 shift = ieee80211_vif_get_shift(&sdata->vif); 2580 2581 sband = local->hw.wiphy->bands[band]; 2582 exrates = 0; 2583 for (i = 0; i < sband->n_bitrates; i++) { 2584 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2585 continue; 2586 exrates++; 2587 } 2588 2589 if (exrates > 8) 2590 exrates -= 8; 2591 else 2592 exrates = 0; 2593 2594 if (skb_tailroom(skb) < exrates + 2) 2595 return -ENOMEM; 2596 2597 if (exrates) { 2598 pos = skb_put(skb, exrates + 2); 2599 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2600 *pos++ = exrates; 2601 for (i = 8; i < sband->n_bitrates; i++) { 2602 u8 basic = 0; 2603 if ((rate_flags & sband->bitrates[i].flags) 2604 != rate_flags) 2605 continue; 2606 if (need_basic && basic_rates & BIT(i)) 2607 basic = 0x80; 2608 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2609 5 * (1 << shift)); 2610 *pos++ = basic | (u8) rate; 2611 } 2612 } 2613 return 0; 2614 } 2615 2616 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2617 { 2618 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2620 2621 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2622 /* non-managed type inferfaces */ 2623 return 0; 2624 } 2625 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 2626 } 2627 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2628 2629 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2630 { 2631 if (!mcs) 2632 return 1; 2633 2634 /* TODO: consider rx_highest */ 2635 2636 if (mcs->rx_mask[3]) 2637 return 4; 2638 if (mcs->rx_mask[2]) 2639 return 3; 2640 if (mcs->rx_mask[1]) 2641 return 2; 2642 return 1; 2643 } 2644 2645 /** 2646 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2647 * @local: mac80211 hw info struct 2648 * @status: RX status 2649 * @mpdu_len: total MPDU length (including FCS) 2650 * @mpdu_offset: offset into MPDU to calculate timestamp at 2651 * 2652 * This function calculates the RX timestamp at the given MPDU offset, taking 2653 * into account what the RX timestamp was. An offset of 0 will just normalize 2654 * the timestamp to TSF at beginning of MPDU reception. 2655 */ 2656 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2657 struct ieee80211_rx_status *status, 2658 unsigned int mpdu_len, 2659 unsigned int mpdu_offset) 2660 { 2661 u64 ts = status->mactime; 2662 struct rate_info ri; 2663 u16 rate; 2664 2665 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2666 return 0; 2667 2668 memset(&ri, 0, sizeof(ri)); 2669 2670 /* Fill cfg80211 rate info */ 2671 if (status->flag & RX_FLAG_HT) { 2672 ri.mcs = status->rate_idx; 2673 ri.flags |= RATE_INFO_FLAGS_MCS; 2674 if (status->flag & RX_FLAG_40MHZ) 2675 ri.bw = RATE_INFO_BW_40; 2676 else 2677 ri.bw = RATE_INFO_BW_20; 2678 if (status->flag & RX_FLAG_SHORT_GI) 2679 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2680 } else if (status->flag & RX_FLAG_VHT) { 2681 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2682 ri.mcs = status->rate_idx; 2683 ri.nss = status->vht_nss; 2684 if (status->flag & RX_FLAG_40MHZ) 2685 ri.bw = RATE_INFO_BW_40; 2686 else if (status->vht_flag & RX_VHT_FLAG_80MHZ) 2687 ri.bw = RATE_INFO_BW_80; 2688 else if (status->vht_flag & RX_VHT_FLAG_160MHZ) 2689 ri.bw = RATE_INFO_BW_160; 2690 else 2691 ri.bw = RATE_INFO_BW_20; 2692 if (status->flag & RX_FLAG_SHORT_GI) 2693 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2694 } else { 2695 struct ieee80211_supported_band *sband; 2696 int shift = 0; 2697 int bitrate; 2698 2699 if (status->flag & RX_FLAG_10MHZ) { 2700 shift = 1; 2701 ri.bw = RATE_INFO_BW_10; 2702 } else if (status->flag & RX_FLAG_5MHZ) { 2703 shift = 2; 2704 ri.bw = RATE_INFO_BW_5; 2705 } else { 2706 ri.bw = RATE_INFO_BW_20; 2707 } 2708 2709 sband = local->hw.wiphy->bands[status->band]; 2710 bitrate = sband->bitrates[status->rate_idx].bitrate; 2711 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2712 2713 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 2714 /* TODO: handle HT/VHT preambles */ 2715 if (status->band == NL80211_BAND_5GHZ) { 2716 ts += 20 << shift; 2717 mpdu_offset += 2; 2718 } else if (status->flag & RX_FLAG_SHORTPRE) { 2719 ts += 96; 2720 } else { 2721 ts += 192; 2722 } 2723 } 2724 } 2725 2726 rate = cfg80211_calculate_bitrate(&ri); 2727 if (WARN_ONCE(!rate, 2728 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 2729 (unsigned long long)status->flag, status->rate_idx, 2730 status->vht_nss)) 2731 return 0; 2732 2733 /* rewind from end of MPDU */ 2734 if (status->flag & RX_FLAG_MACTIME_END) 2735 ts -= mpdu_len * 8 * 10 / rate; 2736 2737 ts += mpdu_offset * 8 * 10 / rate; 2738 2739 return ts; 2740 } 2741 2742 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2743 { 2744 struct ieee80211_sub_if_data *sdata; 2745 struct cfg80211_chan_def chandef; 2746 2747 mutex_lock(&local->mtx); 2748 mutex_lock(&local->iflist_mtx); 2749 list_for_each_entry(sdata, &local->interfaces, list) { 2750 /* it might be waiting for the local->mtx, but then 2751 * by the time it gets it, sdata->wdev.cac_started 2752 * will no longer be true 2753 */ 2754 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2755 2756 if (sdata->wdev.cac_started) { 2757 chandef = sdata->vif.bss_conf.chandef; 2758 ieee80211_vif_release_channel(sdata); 2759 cfg80211_cac_event(sdata->dev, 2760 &chandef, 2761 NL80211_RADAR_CAC_ABORTED, 2762 GFP_KERNEL); 2763 } 2764 } 2765 mutex_unlock(&local->iflist_mtx); 2766 mutex_unlock(&local->mtx); 2767 } 2768 2769 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2770 { 2771 struct ieee80211_local *local = 2772 container_of(work, struct ieee80211_local, radar_detected_work); 2773 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2774 struct ieee80211_chanctx *ctx; 2775 int num_chanctx = 0; 2776 2777 mutex_lock(&local->chanctx_mtx); 2778 list_for_each_entry(ctx, &local->chanctx_list, list) { 2779 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 2780 continue; 2781 2782 num_chanctx++; 2783 chandef = ctx->conf.def; 2784 } 2785 mutex_unlock(&local->chanctx_mtx); 2786 2787 ieee80211_dfs_cac_cancel(local); 2788 2789 if (num_chanctx > 1) 2790 /* XXX: multi-channel is not supported yet */ 2791 WARN_ON(1); 2792 else 2793 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 2794 } 2795 2796 void ieee80211_radar_detected(struct ieee80211_hw *hw) 2797 { 2798 struct ieee80211_local *local = hw_to_local(hw); 2799 2800 trace_api_radar_detected(local); 2801 2802 ieee80211_queue_work(hw, &local->radar_detected_work); 2803 } 2804 EXPORT_SYMBOL(ieee80211_radar_detected); 2805 2806 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 2807 { 2808 u32 ret; 2809 int tmp; 2810 2811 switch (c->width) { 2812 case NL80211_CHAN_WIDTH_20: 2813 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2814 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2815 break; 2816 case NL80211_CHAN_WIDTH_40: 2817 c->width = NL80211_CHAN_WIDTH_20; 2818 c->center_freq1 = c->chan->center_freq; 2819 ret = IEEE80211_STA_DISABLE_40MHZ | 2820 IEEE80211_STA_DISABLE_VHT; 2821 break; 2822 case NL80211_CHAN_WIDTH_80: 2823 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 2824 /* n_P40 */ 2825 tmp /= 2; 2826 /* freq_P40 */ 2827 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 2828 c->width = NL80211_CHAN_WIDTH_40; 2829 ret = IEEE80211_STA_DISABLE_VHT; 2830 break; 2831 case NL80211_CHAN_WIDTH_80P80: 2832 c->center_freq2 = 0; 2833 c->width = NL80211_CHAN_WIDTH_80; 2834 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2835 IEEE80211_STA_DISABLE_160MHZ; 2836 break; 2837 case NL80211_CHAN_WIDTH_160: 2838 /* n_P20 */ 2839 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 2840 /* n_P80 */ 2841 tmp /= 4; 2842 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 2843 c->width = NL80211_CHAN_WIDTH_80; 2844 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2845 IEEE80211_STA_DISABLE_160MHZ; 2846 break; 2847 default: 2848 case NL80211_CHAN_WIDTH_20_NOHT: 2849 WARN_ON_ONCE(1); 2850 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2851 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2852 break; 2853 case NL80211_CHAN_WIDTH_5: 2854 case NL80211_CHAN_WIDTH_10: 2855 WARN_ON_ONCE(1); 2856 /* keep c->width */ 2857 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2858 break; 2859 } 2860 2861 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 2862 2863 return ret; 2864 } 2865 2866 /* 2867 * Returns true if smps_mode_new is strictly more restrictive than 2868 * smps_mode_old. 2869 */ 2870 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 2871 enum ieee80211_smps_mode smps_mode_new) 2872 { 2873 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 2874 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 2875 return false; 2876 2877 switch (smps_mode_old) { 2878 case IEEE80211_SMPS_STATIC: 2879 return false; 2880 case IEEE80211_SMPS_DYNAMIC: 2881 return smps_mode_new == IEEE80211_SMPS_STATIC; 2882 case IEEE80211_SMPS_OFF: 2883 return smps_mode_new != IEEE80211_SMPS_OFF; 2884 default: 2885 WARN_ON(1); 2886 } 2887 2888 return false; 2889 } 2890 2891 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 2892 struct cfg80211_csa_settings *csa_settings) 2893 { 2894 struct sk_buff *skb; 2895 struct ieee80211_mgmt *mgmt; 2896 struct ieee80211_local *local = sdata->local; 2897 int freq; 2898 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) + 2899 sizeof(mgmt->u.action.u.chan_switch); 2900 u8 *pos; 2901 2902 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 2903 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 2904 return -EOPNOTSUPP; 2905 2906 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 2907 5 + /* channel switch announcement element */ 2908 3 + /* secondary channel offset element */ 2909 8); /* mesh channel switch parameters element */ 2910 if (!skb) 2911 return -ENOMEM; 2912 2913 skb_reserve(skb, local->tx_headroom); 2914 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len); 2915 memset(mgmt, 0, hdr_len); 2916 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2917 IEEE80211_STYPE_ACTION); 2918 2919 eth_broadcast_addr(mgmt->da); 2920 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2921 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2922 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 2923 } else { 2924 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 2925 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 2926 } 2927 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 2928 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 2929 pos = skb_put(skb, 5); 2930 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 2931 *pos++ = 3; /* IE length */ 2932 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 2933 freq = csa_settings->chandef.chan->center_freq; 2934 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 2935 *pos++ = csa_settings->count; /* count */ 2936 2937 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 2938 enum nl80211_channel_type ch_type; 2939 2940 skb_put(skb, 3); 2941 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 2942 *pos++ = 1; /* IE length */ 2943 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 2944 if (ch_type == NL80211_CHAN_HT40PLUS) 2945 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2946 else 2947 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2948 } 2949 2950 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2951 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 2952 2953 skb_put(skb, 8); 2954 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 2955 *pos++ = 6; /* IE length */ 2956 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 2957 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 2958 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 2959 *pos++ |= csa_settings->block_tx ? 2960 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 2961 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 2962 pos += 2; 2963 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 2964 pos += 2; 2965 } 2966 2967 ieee80211_tx_skb(sdata, skb); 2968 return 0; 2969 } 2970 2971 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 2972 { 2973 return !(cs == NULL || cs->cipher == 0 || 2974 cs->hdr_len < cs->pn_len + cs->pn_off || 2975 cs->hdr_len <= cs->key_idx_off || 2976 cs->key_idx_shift > 7 || 2977 cs->key_idx_mask == 0); 2978 } 2979 2980 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 2981 { 2982 int i; 2983 2984 /* Ensure we have enough iftype bitmap space for all iftype values */ 2985 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 2986 2987 for (i = 0; i < n; i++) 2988 if (!ieee80211_cs_valid(&cs[i])) 2989 return false; 2990 2991 return true; 2992 } 2993 2994 const struct ieee80211_cipher_scheme * 2995 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 2996 enum nl80211_iftype iftype) 2997 { 2998 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 2999 int n = local->hw.n_cipher_schemes; 3000 int i; 3001 const struct ieee80211_cipher_scheme *cs = NULL; 3002 3003 for (i = 0; i < n; i++) { 3004 if (l[i].cipher == cipher) { 3005 cs = &l[i]; 3006 break; 3007 } 3008 } 3009 3010 if (!cs || !(cs->iftype & BIT(iftype))) 3011 return NULL; 3012 3013 return cs; 3014 } 3015 3016 int ieee80211_cs_headroom(struct ieee80211_local *local, 3017 struct cfg80211_crypto_settings *crypto, 3018 enum nl80211_iftype iftype) 3019 { 3020 const struct ieee80211_cipher_scheme *cs; 3021 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3022 int i; 3023 3024 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3025 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3026 iftype); 3027 3028 if (cs && headroom < cs->hdr_len) 3029 headroom = cs->hdr_len; 3030 } 3031 3032 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3033 if (cs && headroom < cs->hdr_len) 3034 headroom = cs->hdr_len; 3035 3036 return headroom; 3037 } 3038 3039 static bool 3040 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3041 { 3042 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3043 int skip; 3044 3045 if (end > 0) 3046 return false; 3047 3048 /* One shot NOA */ 3049 if (data->count[i] == 1) 3050 return false; 3051 3052 if (data->desc[i].interval == 0) 3053 return false; 3054 3055 /* End time is in the past, check for repetitions */ 3056 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3057 if (data->count[i] < 255) { 3058 if (data->count[i] <= skip) { 3059 data->count[i] = 0; 3060 return false; 3061 } 3062 3063 data->count[i] -= skip; 3064 } 3065 3066 data->desc[i].start += skip * data->desc[i].interval; 3067 3068 return true; 3069 } 3070 3071 static bool 3072 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3073 s32 *offset) 3074 { 3075 bool ret = false; 3076 int i; 3077 3078 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3079 s32 cur; 3080 3081 if (!data->count[i]) 3082 continue; 3083 3084 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3085 ret = true; 3086 3087 cur = data->desc[i].start - tsf; 3088 if (cur > *offset) 3089 continue; 3090 3091 cur = data->desc[i].start + data->desc[i].duration - tsf; 3092 if (cur > *offset) 3093 *offset = cur; 3094 } 3095 3096 return ret; 3097 } 3098 3099 static u32 3100 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3101 { 3102 s32 offset = 0; 3103 int tries = 0; 3104 /* 3105 * arbitrary limit, used to avoid infinite loops when combined NoA 3106 * descriptors cover the full time period. 3107 */ 3108 int max_tries = 5; 3109 3110 ieee80211_extend_absent_time(data, tsf, &offset); 3111 do { 3112 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3113 break; 3114 3115 tries++; 3116 } while (tries < max_tries); 3117 3118 return offset; 3119 } 3120 3121 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3122 { 3123 u32 next_offset = BIT(31) - 1; 3124 int i; 3125 3126 data->absent = 0; 3127 data->has_next_tsf = false; 3128 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3129 s32 start; 3130 3131 if (!data->count[i]) 3132 continue; 3133 3134 ieee80211_extend_noa_desc(data, tsf, i); 3135 start = data->desc[i].start - tsf; 3136 if (start <= 0) 3137 data->absent |= BIT(i); 3138 3139 if (next_offset > start) 3140 next_offset = start; 3141 3142 data->has_next_tsf = true; 3143 } 3144 3145 if (data->absent) 3146 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3147 3148 data->next_tsf = tsf + next_offset; 3149 } 3150 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3151 3152 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3153 struct ieee80211_noa_data *data, u32 tsf) 3154 { 3155 int ret = 0; 3156 int i; 3157 3158 memset(data, 0, sizeof(*data)); 3159 3160 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3161 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3162 3163 if (!desc->count || !desc->duration) 3164 continue; 3165 3166 data->count[i] = desc->count; 3167 data->desc[i].start = le32_to_cpu(desc->start_time); 3168 data->desc[i].duration = le32_to_cpu(desc->duration); 3169 data->desc[i].interval = le32_to_cpu(desc->interval); 3170 3171 if (data->count[i] > 1 && 3172 data->desc[i].interval < data->desc[i].duration) 3173 continue; 3174 3175 ieee80211_extend_noa_desc(data, tsf, i); 3176 ret++; 3177 } 3178 3179 if (ret) 3180 ieee80211_update_p2p_noa(data, tsf); 3181 3182 return ret; 3183 } 3184 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3185 3186 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3187 struct ieee80211_sub_if_data *sdata) 3188 { 3189 u64 tsf = drv_get_tsf(local, sdata); 3190 u64 dtim_count = 0; 3191 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3192 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3193 struct ps_data *ps; 3194 u8 bcns_from_dtim; 3195 3196 if (tsf == -1ULL || !beacon_int || !dtim_period) 3197 return; 3198 3199 if (sdata->vif.type == NL80211_IFTYPE_AP || 3200 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3201 if (!sdata->bss) 3202 return; 3203 3204 ps = &sdata->bss->ps; 3205 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3206 ps = &sdata->u.mesh.ps; 3207 } else { 3208 return; 3209 } 3210 3211 /* 3212 * actually finds last dtim_count, mac80211 will update in 3213 * __beacon_add_tim(). 3214 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3215 */ 3216 do_div(tsf, beacon_int); 3217 bcns_from_dtim = do_div(tsf, dtim_period); 3218 /* just had a DTIM */ 3219 if (!bcns_from_dtim) 3220 dtim_count = 0; 3221 else 3222 dtim_count = dtim_period - bcns_from_dtim; 3223 3224 ps->dtim_count = dtim_count; 3225 } 3226 3227 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3228 struct ieee80211_chanctx *ctx) 3229 { 3230 struct ieee80211_sub_if_data *sdata; 3231 u8 radar_detect = 0; 3232 3233 lockdep_assert_held(&local->chanctx_mtx); 3234 3235 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3236 return 0; 3237 3238 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3239 if (sdata->reserved_radar_required) 3240 radar_detect |= BIT(sdata->reserved_chandef.width); 3241 3242 /* 3243 * An in-place reservation context should not have any assigned vifs 3244 * until it replaces the other context. 3245 */ 3246 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3247 !list_empty(&ctx->assigned_vifs)); 3248 3249 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3250 if (sdata->radar_required) 3251 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3252 3253 return radar_detect; 3254 } 3255 3256 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3257 const struct cfg80211_chan_def *chandef, 3258 enum ieee80211_chanctx_mode chanmode, 3259 u8 radar_detect) 3260 { 3261 struct ieee80211_local *local = sdata->local; 3262 struct ieee80211_sub_if_data *sdata_iter; 3263 enum nl80211_iftype iftype = sdata->wdev.iftype; 3264 int num[NUM_NL80211_IFTYPES]; 3265 struct ieee80211_chanctx *ctx; 3266 int num_different_channels = 0; 3267 int total = 1; 3268 3269 lockdep_assert_held(&local->chanctx_mtx); 3270 3271 if (WARN_ON(hweight32(radar_detect) > 1)) 3272 return -EINVAL; 3273 3274 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3275 !chandef->chan)) 3276 return -EINVAL; 3277 3278 if (chandef) 3279 num_different_channels = 1; 3280 3281 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3282 return -EINVAL; 3283 3284 /* Always allow software iftypes */ 3285 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3286 if (radar_detect) 3287 return -EINVAL; 3288 return 0; 3289 } 3290 3291 memset(num, 0, sizeof(num)); 3292 3293 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3294 num[iftype] = 1; 3295 3296 list_for_each_entry(ctx, &local->chanctx_list, list) { 3297 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3298 continue; 3299 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3300 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3301 num_different_channels++; 3302 continue; 3303 } 3304 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3305 cfg80211_chandef_compatible(chandef, 3306 &ctx->conf.def)) 3307 continue; 3308 num_different_channels++; 3309 } 3310 3311 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3312 struct wireless_dev *wdev_iter; 3313 3314 wdev_iter = &sdata_iter->wdev; 3315 3316 if (sdata_iter == sdata || 3317 !ieee80211_sdata_running(sdata_iter) || 3318 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3319 continue; 3320 3321 num[wdev_iter->iftype]++; 3322 total++; 3323 } 3324 3325 if (total == 1 && !radar_detect) 3326 return 0; 3327 3328 return cfg80211_check_combinations(local->hw.wiphy, 3329 num_different_channels, 3330 radar_detect, num); 3331 } 3332 3333 static void 3334 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3335 void *data) 3336 { 3337 u32 *max_num_different_channels = data; 3338 3339 *max_num_different_channels = max(*max_num_different_channels, 3340 c->num_different_channels); 3341 } 3342 3343 int ieee80211_max_num_channels(struct ieee80211_local *local) 3344 { 3345 struct ieee80211_sub_if_data *sdata; 3346 int num[NUM_NL80211_IFTYPES] = {}; 3347 struct ieee80211_chanctx *ctx; 3348 int num_different_channels = 0; 3349 u8 radar_detect = 0; 3350 u32 max_num_different_channels = 1; 3351 int err; 3352 3353 lockdep_assert_held(&local->chanctx_mtx); 3354 3355 list_for_each_entry(ctx, &local->chanctx_list, list) { 3356 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3357 continue; 3358 3359 num_different_channels++; 3360 3361 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3362 } 3363 3364 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3365 num[sdata->wdev.iftype]++; 3366 3367 err = cfg80211_iter_combinations(local->hw.wiphy, 3368 num_different_channels, radar_detect, 3369 num, ieee80211_iter_max_chans, 3370 &max_num_different_channels); 3371 if (err < 0) 3372 return err; 3373 3374 return max_num_different_channels; 3375 } 3376 3377 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3378 { 3379 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3380 *buf++ = 7; /* len */ 3381 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3382 *buf++ = 0x50; 3383 *buf++ = 0xf2; 3384 *buf++ = 2; /* WME */ 3385 *buf++ = 0; /* WME info */ 3386 *buf++ = 1; /* WME ver */ 3387 *buf++ = qosinfo; /* U-APSD no in use */ 3388 3389 return buf; 3390 } 3391 3392 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3393 unsigned long *frame_cnt, 3394 unsigned long *byte_cnt) 3395 { 3396 struct txq_info *txqi = to_txq_info(txq); 3397 3398 if (frame_cnt) 3399 *frame_cnt = txqi->tin.backlog_packets; 3400 3401 if (byte_cnt) 3402 *byte_cnt = txqi->tin.backlog_bytes; 3403 } 3404 EXPORT_SYMBOL(ieee80211_txq_get_depth); 3405