1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2013-2014 Intel Mobile Communications GmbH 8 * Copyright (C) 2015-2017 Intel Deutschland GmbH 9 * Copyright (C) 2018-2019 Intel Corporation 10 * 11 * utilities for mac80211 12 */ 13 14 #include <net/mac80211.h> 15 #include <linux/netdevice.h> 16 #include <linux/export.h> 17 #include <linux/types.h> 18 #include <linux/slab.h> 19 #include <linux/skbuff.h> 20 #include <linux/etherdevice.h> 21 #include <linux/if_arp.h> 22 #include <linux/bitmap.h> 23 #include <linux/crc32.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/rtnetlink.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wme.h" 33 #include "led.h" 34 #include "wep.h" 35 36 /* privid for wiphys to determine whether they belong to us or not */ 37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 38 39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 40 { 41 struct ieee80211_local *local; 42 BUG_ON(!wiphy); 43 44 local = wiphy_priv(wiphy); 45 return &local->hw; 46 } 47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 48 49 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 50 { 51 struct sk_buff *skb; 52 struct ieee80211_hdr *hdr; 53 54 skb_queue_walk(&tx->skbs, skb) { 55 hdr = (struct ieee80211_hdr *) skb->data; 56 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 57 } 58 } 59 60 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 61 int rate, int erp, int short_preamble, 62 int shift) 63 { 64 int dur; 65 66 /* calculate duration (in microseconds, rounded up to next higher 67 * integer if it includes a fractional microsecond) to send frame of 68 * len bytes (does not include FCS) at the given rate. Duration will 69 * also include SIFS. 70 * 71 * rate is in 100 kbps, so divident is multiplied by 10 in the 72 * DIV_ROUND_UP() operations. 73 * 74 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 75 * is assumed to be 0 otherwise. 76 */ 77 78 if (band == NL80211_BAND_5GHZ || erp) { 79 /* 80 * OFDM: 81 * 82 * N_DBPS = DATARATE x 4 83 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 84 * (16 = SIGNAL time, 6 = tail bits) 85 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 86 * 87 * T_SYM = 4 usec 88 * 802.11a - 18.5.2: aSIFSTime = 16 usec 89 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 90 * signal ext = 6 usec 91 */ 92 dur = 16; /* SIFS + signal ext */ 93 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 94 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 95 96 /* IEEE 802.11-2012 18.3.2.4: all values above are: 97 * * times 4 for 5 MHz 98 * * times 2 for 10 MHz 99 */ 100 dur *= 1 << shift; 101 102 /* rates should already consider the channel bandwidth, 103 * don't apply divisor again. 104 */ 105 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 106 4 * rate); /* T_SYM x N_SYM */ 107 } else { 108 /* 109 * 802.11b or 802.11g with 802.11b compatibility: 110 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 111 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 112 * 113 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 114 * aSIFSTime = 10 usec 115 * aPreambleLength = 144 usec or 72 usec with short preamble 116 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 117 */ 118 dur = 10; /* aSIFSTime = 10 usec */ 119 dur += short_preamble ? (72 + 24) : (144 + 48); 120 121 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 122 } 123 124 return dur; 125 } 126 127 /* Exported duration function for driver use */ 128 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 129 struct ieee80211_vif *vif, 130 enum nl80211_band band, 131 size_t frame_len, 132 struct ieee80211_rate *rate) 133 { 134 struct ieee80211_sub_if_data *sdata; 135 u16 dur; 136 int erp, shift = 0; 137 bool short_preamble = false; 138 139 erp = 0; 140 if (vif) { 141 sdata = vif_to_sdata(vif); 142 short_preamble = sdata->vif.bss_conf.use_short_preamble; 143 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 144 erp = rate->flags & IEEE80211_RATE_ERP_G; 145 shift = ieee80211_vif_get_shift(vif); 146 } 147 148 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 149 short_preamble, shift); 150 151 return cpu_to_le16(dur); 152 } 153 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 154 155 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 156 struct ieee80211_vif *vif, size_t frame_len, 157 const struct ieee80211_tx_info *frame_txctl) 158 { 159 struct ieee80211_local *local = hw_to_local(hw); 160 struct ieee80211_rate *rate; 161 struct ieee80211_sub_if_data *sdata; 162 bool short_preamble; 163 int erp, shift = 0, bitrate; 164 u16 dur; 165 struct ieee80211_supported_band *sband; 166 167 sband = local->hw.wiphy->bands[frame_txctl->band]; 168 169 short_preamble = false; 170 171 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 172 173 erp = 0; 174 if (vif) { 175 sdata = vif_to_sdata(vif); 176 short_preamble = sdata->vif.bss_conf.use_short_preamble; 177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 178 erp = rate->flags & IEEE80211_RATE_ERP_G; 179 shift = ieee80211_vif_get_shift(vif); 180 } 181 182 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 183 184 /* CTS duration */ 185 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 186 erp, short_preamble, shift); 187 /* Data frame duration */ 188 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 189 erp, short_preamble, shift); 190 /* ACK duration */ 191 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 192 erp, short_preamble, shift); 193 194 return cpu_to_le16(dur); 195 } 196 EXPORT_SYMBOL(ieee80211_rts_duration); 197 198 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 199 struct ieee80211_vif *vif, 200 size_t frame_len, 201 const struct ieee80211_tx_info *frame_txctl) 202 { 203 struct ieee80211_local *local = hw_to_local(hw); 204 struct ieee80211_rate *rate; 205 struct ieee80211_sub_if_data *sdata; 206 bool short_preamble; 207 int erp, shift = 0, bitrate; 208 u16 dur; 209 struct ieee80211_supported_band *sband; 210 211 sband = local->hw.wiphy->bands[frame_txctl->band]; 212 213 short_preamble = false; 214 215 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 216 erp = 0; 217 if (vif) { 218 sdata = vif_to_sdata(vif); 219 short_preamble = sdata->vif.bss_conf.use_short_preamble; 220 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 221 erp = rate->flags & IEEE80211_RATE_ERP_G; 222 shift = ieee80211_vif_get_shift(vif); 223 } 224 225 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 226 227 /* Data frame duration */ 228 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 229 erp, short_preamble, shift); 230 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 231 /* ACK duration */ 232 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 233 erp, short_preamble, shift); 234 } 235 236 return cpu_to_le16(dur); 237 } 238 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 239 240 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 241 { 242 struct ieee80211_local *local = sdata->local; 243 struct ieee80211_vif *vif = &sdata->vif; 244 struct fq *fq = &local->fq; 245 struct ps_data *ps = NULL; 246 struct txq_info *txqi; 247 struct sta_info *sta; 248 int i; 249 250 local_bh_disable(); 251 spin_lock(&fq->lock); 252 253 if (sdata->vif.type == NL80211_IFTYPE_AP) 254 ps = &sdata->bss->ps; 255 256 sdata->vif.txqs_stopped[ac] = false; 257 258 list_for_each_entry_rcu(sta, &local->sta_list, list) { 259 if (sdata != sta->sdata) 260 continue; 261 262 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 263 struct ieee80211_txq *txq = sta->sta.txq[i]; 264 265 if (!txq) 266 continue; 267 268 txqi = to_txq_info(txq); 269 270 if (ac != txq->ac) 271 continue; 272 273 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, 274 &txqi->flags)) 275 continue; 276 277 spin_unlock(&fq->lock); 278 drv_wake_tx_queue(local, txqi); 279 spin_lock(&fq->lock); 280 } 281 } 282 283 if (!vif->txq) 284 goto out; 285 286 txqi = to_txq_info(vif->txq); 287 288 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) || 289 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac) 290 goto out; 291 292 spin_unlock(&fq->lock); 293 294 drv_wake_tx_queue(local, txqi); 295 local_bh_enable(); 296 return; 297 out: 298 spin_unlock(&fq->lock); 299 local_bh_enable(); 300 } 301 302 static void 303 __releases(&local->queue_stop_reason_lock) 304 __acquires(&local->queue_stop_reason_lock) 305 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 306 { 307 struct ieee80211_sub_if_data *sdata; 308 int n_acs = IEEE80211_NUM_ACS; 309 int i; 310 311 rcu_read_lock(); 312 313 if (local->hw.queues < IEEE80211_NUM_ACS) 314 n_acs = 1; 315 316 for (i = 0; i < local->hw.queues; i++) { 317 if (local->queue_stop_reasons[i]) 318 continue; 319 320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 321 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 322 int ac; 323 324 for (ac = 0; ac < n_acs; ac++) { 325 int ac_queue = sdata->vif.hw_queue[ac]; 326 327 if (ac_queue == i || 328 sdata->vif.cab_queue == i) 329 __ieee80211_wake_txqs(sdata, ac); 330 } 331 } 332 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 333 } 334 335 rcu_read_unlock(); 336 } 337 338 void ieee80211_wake_txqs(unsigned long data) 339 { 340 struct ieee80211_local *local = (struct ieee80211_local *)data; 341 unsigned long flags; 342 343 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 344 _ieee80211_wake_txqs(local, &flags); 345 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 346 } 347 348 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 349 { 350 struct ieee80211_sub_if_data *sdata; 351 int n_acs = IEEE80211_NUM_ACS; 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 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 360 int ac; 361 362 if (!sdata->dev) 363 continue; 364 365 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 366 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 367 continue; 368 369 for (ac = 0; ac < n_acs; ac++) { 370 int ac_queue = sdata->vif.hw_queue[ac]; 371 372 if (ac_queue == queue || 373 (sdata->vif.cab_queue == queue && 374 local->queue_stop_reasons[ac_queue] == 0 && 375 skb_queue_empty(&local->pending[ac_queue]))) 376 netif_wake_subqueue(sdata->dev, ac); 377 } 378 } 379 } 380 381 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 382 enum queue_stop_reason reason, 383 bool refcounted, 384 unsigned long *flags) 385 { 386 struct ieee80211_local *local = hw_to_local(hw); 387 388 trace_wake_queue(local, queue, reason); 389 390 if (WARN_ON(queue >= hw->queues)) 391 return; 392 393 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 394 return; 395 396 if (!refcounted) { 397 local->q_stop_reasons[queue][reason] = 0; 398 } else { 399 local->q_stop_reasons[queue][reason]--; 400 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 401 local->q_stop_reasons[queue][reason] = 0; 402 } 403 404 if (local->q_stop_reasons[queue][reason] == 0) 405 __clear_bit(reason, &local->queue_stop_reasons[queue]); 406 407 if (local->queue_stop_reasons[queue] != 0) 408 /* someone still has this queue stopped */ 409 return; 410 411 if (skb_queue_empty(&local->pending[queue])) { 412 rcu_read_lock(); 413 ieee80211_propagate_queue_wake(local, queue); 414 rcu_read_unlock(); 415 } else 416 tasklet_schedule(&local->tx_pending_tasklet); 417 418 /* 419 * Calling _ieee80211_wake_txqs here can be a problem because it may 420 * release queue_stop_reason_lock which has been taken by 421 * __ieee80211_wake_queue's caller. It is certainly not very nice to 422 * release someone's lock, but it is fine because all the callers of 423 * __ieee80211_wake_queue call it right before releasing the lock. 424 */ 425 if (local->ops->wake_tx_queue) { 426 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 427 tasklet_schedule(&local->wake_txqs_tasklet); 428 else 429 _ieee80211_wake_txqs(local, flags); 430 } 431 } 432 433 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 434 enum queue_stop_reason reason, 435 bool refcounted) 436 { 437 struct ieee80211_local *local = hw_to_local(hw); 438 unsigned long flags; 439 440 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 441 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 442 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 443 } 444 445 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 446 { 447 ieee80211_wake_queue_by_reason(hw, queue, 448 IEEE80211_QUEUE_STOP_REASON_DRIVER, 449 false); 450 } 451 EXPORT_SYMBOL(ieee80211_wake_queue); 452 453 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 454 enum queue_stop_reason reason, 455 bool refcounted) 456 { 457 struct ieee80211_local *local = hw_to_local(hw); 458 struct ieee80211_sub_if_data *sdata; 459 int n_acs = IEEE80211_NUM_ACS; 460 461 trace_stop_queue(local, queue, reason); 462 463 if (WARN_ON(queue >= hw->queues)) 464 return; 465 466 if (!refcounted) 467 local->q_stop_reasons[queue][reason] = 1; 468 else 469 local->q_stop_reasons[queue][reason]++; 470 471 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 472 return; 473 474 if (local->hw.queues < IEEE80211_NUM_ACS) 475 n_acs = 1; 476 477 rcu_read_lock(); 478 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 479 int ac; 480 481 if (!sdata->dev) 482 continue; 483 484 for (ac = 0; ac < n_acs; ac++) { 485 if (sdata->vif.hw_queue[ac] == queue || 486 sdata->vif.cab_queue == queue) { 487 if (!local->ops->wake_tx_queue) { 488 netif_stop_subqueue(sdata->dev, ac); 489 continue; 490 } 491 spin_lock(&local->fq.lock); 492 sdata->vif.txqs_stopped[ac] = true; 493 spin_unlock(&local->fq.lock); 494 } 495 } 496 } 497 rcu_read_unlock(); 498 } 499 500 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 501 enum queue_stop_reason reason, 502 bool refcounted) 503 { 504 struct ieee80211_local *local = hw_to_local(hw); 505 unsigned long flags; 506 507 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 508 __ieee80211_stop_queue(hw, queue, reason, refcounted); 509 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 510 } 511 512 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 513 { 514 ieee80211_stop_queue_by_reason(hw, queue, 515 IEEE80211_QUEUE_STOP_REASON_DRIVER, 516 false); 517 } 518 EXPORT_SYMBOL(ieee80211_stop_queue); 519 520 void ieee80211_add_pending_skb(struct ieee80211_local *local, 521 struct sk_buff *skb) 522 { 523 struct ieee80211_hw *hw = &local->hw; 524 unsigned long flags; 525 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 526 int queue = info->hw_queue; 527 528 if (WARN_ON(!info->control.vif)) { 529 ieee80211_free_txskb(&local->hw, skb); 530 return; 531 } 532 533 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 534 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 535 false); 536 __skb_queue_tail(&local->pending[queue], skb); 537 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 538 false, &flags); 539 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 540 } 541 542 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 543 struct sk_buff_head *skbs) 544 { 545 struct ieee80211_hw *hw = &local->hw; 546 struct sk_buff *skb; 547 unsigned long flags; 548 int queue, i; 549 550 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 551 while ((skb = skb_dequeue(skbs))) { 552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 553 554 if (WARN_ON(!info->control.vif)) { 555 ieee80211_free_txskb(&local->hw, skb); 556 continue; 557 } 558 559 queue = info->hw_queue; 560 561 __ieee80211_stop_queue(hw, queue, 562 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 563 false); 564 565 __skb_queue_tail(&local->pending[queue], skb); 566 } 567 568 for (i = 0; i < hw->queues; i++) 569 __ieee80211_wake_queue(hw, i, 570 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 571 false, &flags); 572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 573 } 574 575 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 576 unsigned long queues, 577 enum queue_stop_reason reason, 578 bool refcounted) 579 { 580 struct ieee80211_local *local = hw_to_local(hw); 581 unsigned long flags; 582 int i; 583 584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 585 586 for_each_set_bit(i, &queues, hw->queues) 587 __ieee80211_stop_queue(hw, i, reason, refcounted); 588 589 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 590 } 591 592 void ieee80211_stop_queues(struct ieee80211_hw *hw) 593 { 594 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 595 IEEE80211_QUEUE_STOP_REASON_DRIVER, 596 false); 597 } 598 EXPORT_SYMBOL(ieee80211_stop_queues); 599 600 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 601 { 602 struct ieee80211_local *local = hw_to_local(hw); 603 unsigned long flags; 604 int ret; 605 606 if (WARN_ON(queue >= hw->queues)) 607 return true; 608 609 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 610 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 611 &local->queue_stop_reasons[queue]); 612 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 613 return ret; 614 } 615 EXPORT_SYMBOL(ieee80211_queue_stopped); 616 617 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 618 unsigned long queues, 619 enum queue_stop_reason reason, 620 bool refcounted) 621 { 622 struct ieee80211_local *local = hw_to_local(hw); 623 unsigned long flags; 624 int i; 625 626 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 627 628 for_each_set_bit(i, &queues, hw->queues) 629 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 630 631 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 632 } 633 634 void ieee80211_wake_queues(struct ieee80211_hw *hw) 635 { 636 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 637 IEEE80211_QUEUE_STOP_REASON_DRIVER, 638 false); 639 } 640 EXPORT_SYMBOL(ieee80211_wake_queues); 641 642 static unsigned int 643 ieee80211_get_vif_queues(struct ieee80211_local *local, 644 struct ieee80211_sub_if_data *sdata) 645 { 646 unsigned int queues; 647 648 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 649 int ac; 650 651 queues = 0; 652 653 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 654 queues |= BIT(sdata->vif.hw_queue[ac]); 655 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 656 queues |= BIT(sdata->vif.cab_queue); 657 } else { 658 /* all queues */ 659 queues = BIT(local->hw.queues) - 1; 660 } 661 662 return queues; 663 } 664 665 void __ieee80211_flush_queues(struct ieee80211_local *local, 666 struct ieee80211_sub_if_data *sdata, 667 unsigned int queues, bool drop) 668 { 669 if (!local->ops->flush) 670 return; 671 672 /* 673 * If no queue was set, or if the HW doesn't support 674 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 675 */ 676 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 677 queues = ieee80211_get_vif_queues(local, sdata); 678 679 ieee80211_stop_queues_by_reason(&local->hw, queues, 680 IEEE80211_QUEUE_STOP_REASON_FLUSH, 681 false); 682 683 drv_flush(local, sdata, queues, drop); 684 685 ieee80211_wake_queues_by_reason(&local->hw, queues, 686 IEEE80211_QUEUE_STOP_REASON_FLUSH, 687 false); 688 } 689 690 void ieee80211_flush_queues(struct ieee80211_local *local, 691 struct ieee80211_sub_if_data *sdata, bool drop) 692 { 693 __ieee80211_flush_queues(local, sdata, 0, drop); 694 } 695 696 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 697 struct ieee80211_sub_if_data *sdata, 698 enum queue_stop_reason reason) 699 { 700 ieee80211_stop_queues_by_reason(&local->hw, 701 ieee80211_get_vif_queues(local, sdata), 702 reason, true); 703 } 704 705 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 706 struct ieee80211_sub_if_data *sdata, 707 enum queue_stop_reason reason) 708 { 709 ieee80211_wake_queues_by_reason(&local->hw, 710 ieee80211_get_vif_queues(local, sdata), 711 reason, true); 712 } 713 714 static void __iterate_interfaces(struct ieee80211_local *local, 715 u32 iter_flags, 716 void (*iterator)(void *data, u8 *mac, 717 struct ieee80211_vif *vif), 718 void *data) 719 { 720 struct ieee80211_sub_if_data *sdata; 721 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 722 723 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 724 switch (sdata->vif.type) { 725 case NL80211_IFTYPE_MONITOR: 726 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 727 continue; 728 break; 729 case NL80211_IFTYPE_AP_VLAN: 730 continue; 731 default: 732 break; 733 } 734 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 735 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 736 continue; 737 if (ieee80211_sdata_running(sdata) || !active_only) 738 iterator(data, sdata->vif.addr, 739 &sdata->vif); 740 } 741 742 sdata = rcu_dereference_check(local->monitor_sdata, 743 lockdep_is_held(&local->iflist_mtx) || 744 lockdep_rtnl_is_held()); 745 if (sdata && 746 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 747 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 748 iterator(data, sdata->vif.addr, &sdata->vif); 749 } 750 751 void ieee80211_iterate_interfaces( 752 struct ieee80211_hw *hw, u32 iter_flags, 753 void (*iterator)(void *data, u8 *mac, 754 struct ieee80211_vif *vif), 755 void *data) 756 { 757 struct ieee80211_local *local = hw_to_local(hw); 758 759 mutex_lock(&local->iflist_mtx); 760 __iterate_interfaces(local, iter_flags, iterator, data); 761 mutex_unlock(&local->iflist_mtx); 762 } 763 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 764 765 void ieee80211_iterate_active_interfaces_atomic( 766 struct ieee80211_hw *hw, u32 iter_flags, 767 void (*iterator)(void *data, u8 *mac, 768 struct ieee80211_vif *vif), 769 void *data) 770 { 771 struct ieee80211_local *local = hw_to_local(hw); 772 773 rcu_read_lock(); 774 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 775 iterator, data); 776 rcu_read_unlock(); 777 } 778 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 779 780 void ieee80211_iterate_active_interfaces_rtnl( 781 struct ieee80211_hw *hw, u32 iter_flags, 782 void (*iterator)(void *data, u8 *mac, 783 struct ieee80211_vif *vif), 784 void *data) 785 { 786 struct ieee80211_local *local = hw_to_local(hw); 787 788 ASSERT_RTNL(); 789 790 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 791 iterator, data); 792 } 793 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 794 795 static void __iterate_stations(struct ieee80211_local *local, 796 void (*iterator)(void *data, 797 struct ieee80211_sta *sta), 798 void *data) 799 { 800 struct sta_info *sta; 801 802 list_for_each_entry_rcu(sta, &local->sta_list, list) { 803 if (!sta->uploaded) 804 continue; 805 806 iterator(data, &sta->sta); 807 } 808 } 809 810 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 811 void (*iterator)(void *data, 812 struct ieee80211_sta *sta), 813 void *data) 814 { 815 struct ieee80211_local *local = hw_to_local(hw); 816 817 rcu_read_lock(); 818 __iterate_stations(local, iterator, data); 819 rcu_read_unlock(); 820 } 821 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 822 823 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 824 { 825 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 826 827 if (!ieee80211_sdata_running(sdata) || 828 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 829 return NULL; 830 return &sdata->vif; 831 } 832 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 833 834 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 835 { 836 struct ieee80211_sub_if_data *sdata; 837 838 if (!vif) 839 return NULL; 840 841 sdata = vif_to_sdata(vif); 842 843 if (!ieee80211_sdata_running(sdata) || 844 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 845 return NULL; 846 847 return &sdata->wdev; 848 } 849 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 850 851 /* 852 * Nothing should have been stuffed into the workqueue during 853 * the suspend->resume cycle. Since we can't check each caller 854 * of this function if we are already quiescing / suspended, 855 * check here and don't WARN since this can actually happen when 856 * the rx path (for example) is racing against __ieee80211_suspend 857 * and suspending / quiescing was set after the rx path checked 858 * them. 859 */ 860 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 861 { 862 if (local->quiescing || (local->suspended && !local->resuming)) { 863 pr_warn("queueing ieee80211 work while going to suspend\n"); 864 return false; 865 } 866 867 return true; 868 } 869 870 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 871 { 872 struct ieee80211_local *local = hw_to_local(hw); 873 874 if (!ieee80211_can_queue_work(local)) 875 return; 876 877 queue_work(local->workqueue, work); 878 } 879 EXPORT_SYMBOL(ieee80211_queue_work); 880 881 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 882 struct delayed_work *dwork, 883 unsigned long delay) 884 { 885 struct ieee80211_local *local = hw_to_local(hw); 886 887 if (!ieee80211_can_queue_work(local)) 888 return; 889 890 queue_delayed_work(local->workqueue, dwork, delay); 891 } 892 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 893 894 static u32 895 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 896 struct ieee802_11_elems *elems, 897 u64 filter, u32 crc, 898 const struct element *check_inherit) 899 { 900 const struct element *elem; 901 bool calc_crc = filter != 0; 902 DECLARE_BITMAP(seen_elems, 256); 903 const u8 *ie; 904 905 bitmap_zero(seen_elems, 256); 906 907 for_each_element(elem, start, len) { 908 bool elem_parse_failed; 909 u8 id = elem->id; 910 u8 elen = elem->datalen; 911 const u8 *pos = elem->data; 912 913 if (check_inherit && 914 !cfg80211_is_element_inherited(elem, 915 check_inherit)) 916 continue; 917 918 switch (id) { 919 case WLAN_EID_SSID: 920 case WLAN_EID_SUPP_RATES: 921 case WLAN_EID_FH_PARAMS: 922 case WLAN_EID_DS_PARAMS: 923 case WLAN_EID_CF_PARAMS: 924 case WLAN_EID_TIM: 925 case WLAN_EID_IBSS_PARAMS: 926 case WLAN_EID_CHALLENGE: 927 case WLAN_EID_RSN: 928 case WLAN_EID_ERP_INFO: 929 case WLAN_EID_EXT_SUPP_RATES: 930 case WLAN_EID_HT_CAPABILITY: 931 case WLAN_EID_HT_OPERATION: 932 case WLAN_EID_VHT_CAPABILITY: 933 case WLAN_EID_VHT_OPERATION: 934 case WLAN_EID_MESH_ID: 935 case WLAN_EID_MESH_CONFIG: 936 case WLAN_EID_PEER_MGMT: 937 case WLAN_EID_PREQ: 938 case WLAN_EID_PREP: 939 case WLAN_EID_PERR: 940 case WLAN_EID_RANN: 941 case WLAN_EID_CHANNEL_SWITCH: 942 case WLAN_EID_EXT_CHANSWITCH_ANN: 943 case WLAN_EID_COUNTRY: 944 case WLAN_EID_PWR_CONSTRAINT: 945 case WLAN_EID_TIMEOUT_INTERVAL: 946 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 947 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 948 case WLAN_EID_CHAN_SWITCH_PARAM: 949 case WLAN_EID_EXT_CAPABILITY: 950 case WLAN_EID_CHAN_SWITCH_TIMING: 951 case WLAN_EID_LINK_ID: 952 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 953 /* 954 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 955 * that if the content gets bigger it might be needed more than once 956 */ 957 if (test_bit(id, seen_elems)) { 958 elems->parse_error = true; 959 continue; 960 } 961 break; 962 } 963 964 if (calc_crc && id < 64 && (filter & (1ULL << id))) 965 crc = crc32_be(crc, pos - 2, elen + 2); 966 967 elem_parse_failed = false; 968 969 switch (id) { 970 case WLAN_EID_LINK_ID: 971 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 972 elem_parse_failed = true; 973 break; 974 } 975 elems->lnk_id = (void *)(pos - 2); 976 break; 977 case WLAN_EID_CHAN_SWITCH_TIMING: 978 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 979 elem_parse_failed = true; 980 break; 981 } 982 elems->ch_sw_timing = (void *)pos; 983 break; 984 case WLAN_EID_EXT_CAPABILITY: 985 elems->ext_capab = pos; 986 elems->ext_capab_len = elen; 987 break; 988 case WLAN_EID_SSID: 989 elems->ssid = pos; 990 elems->ssid_len = elen; 991 break; 992 case WLAN_EID_SUPP_RATES: 993 elems->supp_rates = pos; 994 elems->supp_rates_len = elen; 995 break; 996 case WLAN_EID_DS_PARAMS: 997 if (elen >= 1) 998 elems->ds_params = pos; 999 else 1000 elem_parse_failed = true; 1001 break; 1002 case WLAN_EID_TIM: 1003 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1004 elems->tim = (void *)pos; 1005 elems->tim_len = elen; 1006 } else 1007 elem_parse_failed = true; 1008 break; 1009 case WLAN_EID_CHALLENGE: 1010 elems->challenge = pos; 1011 elems->challenge_len = elen; 1012 break; 1013 case WLAN_EID_VENDOR_SPECIFIC: 1014 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1015 pos[2] == 0xf2) { 1016 /* Microsoft OUI (00:50:F2) */ 1017 1018 if (calc_crc) 1019 crc = crc32_be(crc, pos - 2, elen + 2); 1020 1021 if (elen >= 5 && pos[3] == 2) { 1022 /* OUI Type 2 - WMM IE */ 1023 if (pos[4] == 0) { 1024 elems->wmm_info = pos; 1025 elems->wmm_info_len = elen; 1026 } else if (pos[4] == 1) { 1027 elems->wmm_param = pos; 1028 elems->wmm_param_len = elen; 1029 } 1030 } 1031 } 1032 break; 1033 case WLAN_EID_RSN: 1034 elems->rsn = pos; 1035 elems->rsn_len = elen; 1036 break; 1037 case WLAN_EID_ERP_INFO: 1038 if (elen >= 1) 1039 elems->erp_info = pos; 1040 else 1041 elem_parse_failed = true; 1042 break; 1043 case WLAN_EID_EXT_SUPP_RATES: 1044 elems->ext_supp_rates = pos; 1045 elems->ext_supp_rates_len = elen; 1046 break; 1047 case WLAN_EID_HT_CAPABILITY: 1048 if (elen >= sizeof(struct ieee80211_ht_cap)) 1049 elems->ht_cap_elem = (void *)pos; 1050 else 1051 elem_parse_failed = true; 1052 break; 1053 case WLAN_EID_HT_OPERATION: 1054 if (elen >= sizeof(struct ieee80211_ht_operation)) 1055 elems->ht_operation = (void *)pos; 1056 else 1057 elem_parse_failed = true; 1058 break; 1059 case WLAN_EID_VHT_CAPABILITY: 1060 if (elen >= sizeof(struct ieee80211_vht_cap)) 1061 elems->vht_cap_elem = (void *)pos; 1062 else 1063 elem_parse_failed = true; 1064 break; 1065 case WLAN_EID_VHT_OPERATION: 1066 if (elen >= sizeof(struct ieee80211_vht_operation)) { 1067 elems->vht_operation = (void *)pos; 1068 if (calc_crc) 1069 crc = crc32_be(crc, pos - 2, elen + 2); 1070 break; 1071 } 1072 elem_parse_failed = true; 1073 break; 1074 case WLAN_EID_OPMODE_NOTIF: 1075 if (elen > 0) { 1076 elems->opmode_notif = pos; 1077 if (calc_crc) 1078 crc = crc32_be(crc, pos - 2, elen + 2); 1079 break; 1080 } 1081 elem_parse_failed = true; 1082 break; 1083 case WLAN_EID_MESH_ID: 1084 elems->mesh_id = pos; 1085 elems->mesh_id_len = elen; 1086 break; 1087 case WLAN_EID_MESH_CONFIG: 1088 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1089 elems->mesh_config = (void *)pos; 1090 else 1091 elem_parse_failed = true; 1092 break; 1093 case WLAN_EID_PEER_MGMT: 1094 elems->peering = pos; 1095 elems->peering_len = elen; 1096 break; 1097 case WLAN_EID_MESH_AWAKE_WINDOW: 1098 if (elen >= 2) 1099 elems->awake_window = (void *)pos; 1100 break; 1101 case WLAN_EID_PREQ: 1102 elems->preq = pos; 1103 elems->preq_len = elen; 1104 break; 1105 case WLAN_EID_PREP: 1106 elems->prep = pos; 1107 elems->prep_len = elen; 1108 break; 1109 case WLAN_EID_PERR: 1110 elems->perr = pos; 1111 elems->perr_len = elen; 1112 break; 1113 case WLAN_EID_RANN: 1114 if (elen >= sizeof(struct ieee80211_rann_ie)) 1115 elems->rann = (void *)pos; 1116 else 1117 elem_parse_failed = true; 1118 break; 1119 case WLAN_EID_CHANNEL_SWITCH: 1120 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1121 elem_parse_failed = true; 1122 break; 1123 } 1124 elems->ch_switch_ie = (void *)pos; 1125 break; 1126 case WLAN_EID_EXT_CHANSWITCH_ANN: 1127 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1128 elem_parse_failed = true; 1129 break; 1130 } 1131 elems->ext_chansw_ie = (void *)pos; 1132 break; 1133 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1134 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1135 elem_parse_failed = true; 1136 break; 1137 } 1138 elems->sec_chan_offs = (void *)pos; 1139 break; 1140 case WLAN_EID_CHAN_SWITCH_PARAM: 1141 if (elen != 1142 sizeof(*elems->mesh_chansw_params_ie)) { 1143 elem_parse_failed = true; 1144 break; 1145 } 1146 elems->mesh_chansw_params_ie = (void *)pos; 1147 break; 1148 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1149 if (!action || 1150 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1151 elem_parse_failed = true; 1152 break; 1153 } 1154 elems->wide_bw_chansw_ie = (void *)pos; 1155 break; 1156 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1157 if (action) { 1158 elem_parse_failed = true; 1159 break; 1160 } 1161 /* 1162 * This is a bit tricky, but as we only care about 1163 * the wide bandwidth channel switch element, so 1164 * just parse it out manually. 1165 */ 1166 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1167 pos, elen); 1168 if (ie) { 1169 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1170 elems->wide_bw_chansw_ie = 1171 (void *)(ie + 2); 1172 else 1173 elem_parse_failed = true; 1174 } 1175 break; 1176 case WLAN_EID_COUNTRY: 1177 elems->country_elem = pos; 1178 elems->country_elem_len = elen; 1179 break; 1180 case WLAN_EID_PWR_CONSTRAINT: 1181 if (elen != 1) { 1182 elem_parse_failed = true; 1183 break; 1184 } 1185 elems->pwr_constr_elem = pos; 1186 break; 1187 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1188 /* Lots of different options exist, but we only care 1189 * about the Dynamic Transmit Power Control element. 1190 * First check for the Cisco OUI, then for the DTPC 1191 * tag (0x00). 1192 */ 1193 if (elen < 4) { 1194 elem_parse_failed = true; 1195 break; 1196 } 1197 1198 if (pos[0] != 0x00 || pos[1] != 0x40 || 1199 pos[2] != 0x96 || pos[3] != 0x00) 1200 break; 1201 1202 if (elen != 6) { 1203 elem_parse_failed = true; 1204 break; 1205 } 1206 1207 if (calc_crc) 1208 crc = crc32_be(crc, pos - 2, elen + 2); 1209 1210 elems->cisco_dtpc_elem = pos; 1211 break; 1212 case WLAN_EID_ADDBA_EXT: 1213 if (elen != sizeof(struct ieee80211_addba_ext_ie)) { 1214 elem_parse_failed = true; 1215 break; 1216 } 1217 elems->addba_ext_ie = (void *)pos; 1218 break; 1219 case WLAN_EID_TIMEOUT_INTERVAL: 1220 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1221 elems->timeout_int = (void *)pos; 1222 else 1223 elem_parse_failed = true; 1224 break; 1225 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1226 if (elen >= sizeof(*elems->max_idle_period_ie)) 1227 elems->max_idle_period_ie = (void *)pos; 1228 break; 1229 case WLAN_EID_EXTENSION: 1230 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA && 1231 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) { 1232 elems->mu_edca_param_set = (void *)&pos[1]; 1233 if (calc_crc) 1234 crc = crc32_be(crc, pos - 2, elen + 2); 1235 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) { 1236 elems->he_cap = (void *)&pos[1]; 1237 elems->he_cap_len = elen - 1; 1238 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION && 1239 elen >= sizeof(*elems->he_operation) && 1240 elen >= ieee80211_he_oper_size(&pos[1])) { 1241 elems->he_operation = (void *)&pos[1]; 1242 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) { 1243 elems->uora_element = (void *)&pos[1]; 1244 } else if (pos[0] == 1245 WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME && 1246 elen == 4) { 1247 elems->max_channel_switch_time = pos + 1; 1248 } else if (pos[0] == 1249 WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION && 1250 elen == 3) { 1251 elems->mbssid_config_ie = (void *)&pos[1]; 1252 } else if (pos[0] == WLAN_EID_EXT_HE_SPR && 1253 elen >= sizeof(*elems->he_spr) && 1254 elen >= ieee80211_he_spr_size(&pos[1])) { 1255 elems->he_spr = (void *)&pos[1]; 1256 } 1257 break; 1258 default: 1259 break; 1260 } 1261 1262 if (elem_parse_failed) 1263 elems->parse_error = true; 1264 else 1265 __set_bit(id, seen_elems); 1266 } 1267 1268 if (!for_each_element_completed(elem, start, len)) 1269 elems->parse_error = true; 1270 1271 return crc; 1272 } 1273 1274 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1275 struct ieee802_11_elems *elems, 1276 u8 *transmitter_bssid, 1277 u8 *bss_bssid, 1278 u8 *nontransmitted_profile) 1279 { 1280 const struct element *elem, *sub; 1281 size_t profile_len = 0; 1282 bool found = false; 1283 1284 if (!bss_bssid || !transmitter_bssid) 1285 return profile_len; 1286 1287 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1288 if (elem->datalen < 2) 1289 continue; 1290 1291 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1292 u8 new_bssid[ETH_ALEN]; 1293 const u8 *index; 1294 1295 if (sub->id != 0 || sub->datalen < 4) { 1296 /* not a valid BSS profile */ 1297 continue; 1298 } 1299 1300 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1301 sub->data[1] != 2) { 1302 /* The first element of the 1303 * Nontransmitted BSSID Profile is not 1304 * the Nontransmitted BSSID Capability 1305 * element. 1306 */ 1307 continue; 1308 } 1309 1310 memset(nontransmitted_profile, 0, len); 1311 profile_len = cfg80211_merge_profile(start, len, 1312 elem, 1313 sub, 1314 nontransmitted_profile, 1315 len); 1316 1317 /* found a Nontransmitted BSSID Profile */ 1318 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1319 nontransmitted_profile, 1320 profile_len); 1321 if (!index || index[1] < 1 || index[2] == 0) { 1322 /* Invalid MBSSID Index element */ 1323 continue; 1324 } 1325 1326 cfg80211_gen_new_bssid(transmitter_bssid, 1327 elem->data[0], 1328 index[2], 1329 new_bssid); 1330 if (ether_addr_equal(new_bssid, bss_bssid)) { 1331 found = true; 1332 elems->bssid_index_len = index[1]; 1333 elems->bssid_index = (void *)&index[2]; 1334 break; 1335 } 1336 } 1337 } 1338 1339 return found ? profile_len : 0; 1340 } 1341 1342 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 1343 struct ieee802_11_elems *elems, 1344 u64 filter, u32 crc, u8 *transmitter_bssid, 1345 u8 *bss_bssid) 1346 { 1347 const struct element *non_inherit = NULL; 1348 u8 *nontransmitted_profile; 1349 int nontransmitted_profile_len = 0; 1350 1351 memset(elems, 0, sizeof(*elems)); 1352 elems->ie_start = start; 1353 elems->total_len = len; 1354 1355 nontransmitted_profile = kmalloc(len, GFP_ATOMIC); 1356 if (nontransmitted_profile) { 1357 nontransmitted_profile_len = 1358 ieee802_11_find_bssid_profile(start, len, elems, 1359 transmitter_bssid, 1360 bss_bssid, 1361 nontransmitted_profile); 1362 non_inherit = 1363 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1364 nontransmitted_profile, 1365 nontransmitted_profile_len); 1366 } 1367 1368 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter, 1369 crc, non_inherit); 1370 1371 /* Override with nontransmitted profile, if found */ 1372 if (nontransmitted_profile_len) 1373 _ieee802_11_parse_elems_crc(nontransmitted_profile, 1374 nontransmitted_profile_len, 1375 action, elems, 0, 0, NULL); 1376 1377 if (elems->tim && !elems->parse_error) { 1378 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1379 1380 elems->dtim_period = tim_ie->dtim_period; 1381 elems->dtim_count = tim_ie->dtim_count; 1382 } 1383 1384 /* Override DTIM period and count if needed */ 1385 if (elems->bssid_index && 1386 elems->bssid_index_len >= 1387 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1388 elems->dtim_period = elems->bssid_index->dtim_period; 1389 1390 if (elems->bssid_index && 1391 elems->bssid_index_len >= 1392 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1393 elems->dtim_count = elems->bssid_index->dtim_count; 1394 1395 kfree(nontransmitted_profile); 1396 1397 return crc; 1398 } 1399 1400 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1401 struct ieee80211_tx_queue_params 1402 *qparam, int ac) 1403 { 1404 struct ieee80211_chanctx_conf *chanctx_conf; 1405 const struct ieee80211_reg_rule *rrule; 1406 const struct ieee80211_wmm_ac *wmm_ac; 1407 u16 center_freq = 0; 1408 1409 if (sdata->vif.type != NL80211_IFTYPE_AP && 1410 sdata->vif.type != NL80211_IFTYPE_STATION) 1411 return; 1412 1413 rcu_read_lock(); 1414 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1415 if (chanctx_conf) 1416 center_freq = chanctx_conf->def.chan->center_freq; 1417 1418 if (!center_freq) { 1419 rcu_read_unlock(); 1420 return; 1421 } 1422 1423 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1424 1425 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1426 rcu_read_unlock(); 1427 return; 1428 } 1429 1430 if (sdata->vif.type == NL80211_IFTYPE_AP) 1431 wmm_ac = &rrule->wmm_rule.ap[ac]; 1432 else 1433 wmm_ac = &rrule->wmm_rule.client[ac]; 1434 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1435 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1436 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1437 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1438 rcu_read_unlock(); 1439 } 1440 1441 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1442 bool bss_notify, bool enable_qos) 1443 { 1444 struct ieee80211_local *local = sdata->local; 1445 struct ieee80211_tx_queue_params qparam; 1446 struct ieee80211_chanctx_conf *chanctx_conf; 1447 int ac; 1448 bool use_11b; 1449 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1450 int aCWmin, aCWmax; 1451 1452 if (!local->ops->conf_tx) 1453 return; 1454 1455 if (local->hw.queues < IEEE80211_NUM_ACS) 1456 return; 1457 1458 memset(&qparam, 0, sizeof(qparam)); 1459 1460 rcu_read_lock(); 1461 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1462 use_11b = (chanctx_conf && 1463 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1464 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1465 rcu_read_unlock(); 1466 1467 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1468 1469 /* Set defaults according to 802.11-2007 Table 7-37 */ 1470 aCWmax = 1023; 1471 if (use_11b) 1472 aCWmin = 31; 1473 else 1474 aCWmin = 15; 1475 1476 /* Confiure old 802.11b/g medium access rules. */ 1477 qparam.cw_max = aCWmax; 1478 qparam.cw_min = aCWmin; 1479 qparam.txop = 0; 1480 qparam.aifs = 2; 1481 1482 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1483 /* Update if QoS is enabled. */ 1484 if (enable_qos) { 1485 switch (ac) { 1486 case IEEE80211_AC_BK: 1487 qparam.cw_max = aCWmax; 1488 qparam.cw_min = aCWmin; 1489 qparam.txop = 0; 1490 if (is_ocb) 1491 qparam.aifs = 9; 1492 else 1493 qparam.aifs = 7; 1494 break; 1495 /* never happens but let's not leave undefined */ 1496 default: 1497 case IEEE80211_AC_BE: 1498 qparam.cw_max = aCWmax; 1499 qparam.cw_min = aCWmin; 1500 qparam.txop = 0; 1501 if (is_ocb) 1502 qparam.aifs = 6; 1503 else 1504 qparam.aifs = 3; 1505 break; 1506 case IEEE80211_AC_VI: 1507 qparam.cw_max = aCWmin; 1508 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1509 if (is_ocb) 1510 qparam.txop = 0; 1511 else if (use_11b) 1512 qparam.txop = 6016/32; 1513 else 1514 qparam.txop = 3008/32; 1515 1516 if (is_ocb) 1517 qparam.aifs = 3; 1518 else 1519 qparam.aifs = 2; 1520 break; 1521 case IEEE80211_AC_VO: 1522 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1523 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1524 if (is_ocb) 1525 qparam.txop = 0; 1526 else if (use_11b) 1527 qparam.txop = 3264/32; 1528 else 1529 qparam.txop = 1504/32; 1530 qparam.aifs = 2; 1531 break; 1532 } 1533 } 1534 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1535 1536 qparam.uapsd = false; 1537 1538 sdata->tx_conf[ac] = qparam; 1539 drv_conf_tx(local, sdata, ac, &qparam); 1540 } 1541 1542 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1543 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1544 sdata->vif.type != NL80211_IFTYPE_NAN) { 1545 sdata->vif.bss_conf.qos = enable_qos; 1546 if (bss_notify) 1547 ieee80211_bss_info_change_notify(sdata, 1548 BSS_CHANGED_QOS); 1549 } 1550 } 1551 1552 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1553 u16 transaction, u16 auth_alg, u16 status, 1554 const u8 *extra, size_t extra_len, const u8 *da, 1555 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1556 u32 tx_flags) 1557 { 1558 struct ieee80211_local *local = sdata->local; 1559 struct sk_buff *skb; 1560 struct ieee80211_mgmt *mgmt; 1561 int err; 1562 1563 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1564 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1565 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1566 if (!skb) 1567 return; 1568 1569 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1570 1571 mgmt = skb_put_zero(skb, 24 + 6); 1572 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1573 IEEE80211_STYPE_AUTH); 1574 memcpy(mgmt->da, da, ETH_ALEN); 1575 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1576 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1577 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1578 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1579 mgmt->u.auth.status_code = cpu_to_le16(status); 1580 if (extra) 1581 skb_put_data(skb, extra, extra_len); 1582 1583 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1584 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1585 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1586 WARN_ON(err); 1587 } 1588 1589 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1590 tx_flags; 1591 ieee80211_tx_skb(sdata, skb); 1592 } 1593 1594 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1595 const u8 *da, const u8 *bssid, 1596 u16 stype, u16 reason, 1597 bool send_frame, u8 *frame_buf) 1598 { 1599 struct ieee80211_local *local = sdata->local; 1600 struct sk_buff *skb; 1601 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1602 1603 /* build frame */ 1604 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1605 mgmt->duration = 0; /* initialize only */ 1606 mgmt->seq_ctrl = 0; /* initialize only */ 1607 memcpy(mgmt->da, da, ETH_ALEN); 1608 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1609 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1610 /* u.deauth.reason_code == u.disassoc.reason_code */ 1611 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1612 1613 if (send_frame) { 1614 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1615 IEEE80211_DEAUTH_FRAME_LEN); 1616 if (!skb) 1617 return; 1618 1619 skb_reserve(skb, local->hw.extra_tx_headroom); 1620 1621 /* copy in frame */ 1622 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1623 1624 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1625 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1626 IEEE80211_SKB_CB(skb)->flags |= 1627 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1628 1629 ieee80211_tx_skb(sdata, skb); 1630 } 1631 } 1632 1633 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1634 u8 *buffer, size_t buffer_len, 1635 const u8 *ie, size_t ie_len, 1636 enum nl80211_band band, 1637 u32 rate_mask, 1638 struct cfg80211_chan_def *chandef, 1639 size_t *offset, u32 flags) 1640 { 1641 struct ieee80211_supported_band *sband; 1642 const struct ieee80211_sta_he_cap *he_cap; 1643 u8 *pos = buffer, *end = buffer + buffer_len; 1644 size_t noffset; 1645 int supp_rates_len, i; 1646 u8 rates[32]; 1647 int num_rates; 1648 int ext_rates_len; 1649 int shift; 1650 u32 rate_flags; 1651 bool have_80mhz = false; 1652 1653 *offset = 0; 1654 1655 sband = local->hw.wiphy->bands[band]; 1656 if (WARN_ON_ONCE(!sband)) 1657 return 0; 1658 1659 rate_flags = ieee80211_chandef_rate_flags(chandef); 1660 shift = ieee80211_chandef_get_shift(chandef); 1661 1662 num_rates = 0; 1663 for (i = 0; i < sband->n_bitrates; i++) { 1664 if ((BIT(i) & rate_mask) == 0) 1665 continue; /* skip rate */ 1666 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1667 continue; 1668 1669 rates[num_rates++] = 1670 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1671 (1 << shift) * 5); 1672 } 1673 1674 supp_rates_len = min_t(int, num_rates, 8); 1675 1676 if (end - pos < 2 + supp_rates_len) 1677 goto out_err; 1678 *pos++ = WLAN_EID_SUPP_RATES; 1679 *pos++ = supp_rates_len; 1680 memcpy(pos, rates, supp_rates_len); 1681 pos += supp_rates_len; 1682 1683 /* insert "request information" if in custom IEs */ 1684 if (ie && ie_len) { 1685 static const u8 before_extrates[] = { 1686 WLAN_EID_SSID, 1687 WLAN_EID_SUPP_RATES, 1688 WLAN_EID_REQUEST, 1689 }; 1690 noffset = ieee80211_ie_split(ie, ie_len, 1691 before_extrates, 1692 ARRAY_SIZE(before_extrates), 1693 *offset); 1694 if (end - pos < noffset - *offset) 1695 goto out_err; 1696 memcpy(pos, ie + *offset, noffset - *offset); 1697 pos += noffset - *offset; 1698 *offset = noffset; 1699 } 1700 1701 ext_rates_len = num_rates - supp_rates_len; 1702 if (ext_rates_len > 0) { 1703 if (end - pos < 2 + ext_rates_len) 1704 goto out_err; 1705 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1706 *pos++ = ext_rates_len; 1707 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1708 pos += ext_rates_len; 1709 } 1710 1711 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1712 if (end - pos < 3) 1713 goto out_err; 1714 *pos++ = WLAN_EID_DS_PARAMS; 1715 *pos++ = 1; 1716 *pos++ = ieee80211_frequency_to_channel( 1717 chandef->chan->center_freq); 1718 } 1719 1720 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1721 goto done; 1722 1723 /* insert custom IEs that go before HT */ 1724 if (ie && ie_len) { 1725 static const u8 before_ht[] = { 1726 /* 1727 * no need to list the ones split off already 1728 * (or generated here) 1729 */ 1730 WLAN_EID_DS_PARAMS, 1731 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1732 }; 1733 noffset = ieee80211_ie_split(ie, ie_len, 1734 before_ht, ARRAY_SIZE(before_ht), 1735 *offset); 1736 if (end - pos < noffset - *offset) 1737 goto out_err; 1738 memcpy(pos, ie + *offset, noffset - *offset); 1739 pos += noffset - *offset; 1740 *offset = noffset; 1741 } 1742 1743 if (sband->ht_cap.ht_supported) { 1744 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1745 goto out_err; 1746 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1747 sband->ht_cap.cap); 1748 } 1749 1750 /* insert custom IEs that go before VHT */ 1751 if (ie && ie_len) { 1752 static const u8 before_vht[] = { 1753 /* 1754 * no need to list the ones split off already 1755 * (or generated here) 1756 */ 1757 WLAN_EID_BSS_COEX_2040, 1758 WLAN_EID_EXT_CAPABILITY, 1759 WLAN_EID_SSID_LIST, 1760 WLAN_EID_CHANNEL_USAGE, 1761 WLAN_EID_INTERWORKING, 1762 WLAN_EID_MESH_ID, 1763 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1764 }; 1765 noffset = ieee80211_ie_split(ie, ie_len, 1766 before_vht, ARRAY_SIZE(before_vht), 1767 *offset); 1768 if (end - pos < noffset - *offset) 1769 goto out_err; 1770 memcpy(pos, ie + *offset, noffset - *offset); 1771 pos += noffset - *offset; 1772 *offset = noffset; 1773 } 1774 1775 /* Check if any channel in this sband supports at least 80 MHz */ 1776 for (i = 0; i < sband->n_channels; i++) { 1777 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1778 IEEE80211_CHAN_NO_80MHZ)) 1779 continue; 1780 1781 have_80mhz = true; 1782 break; 1783 } 1784 1785 if (sband->vht_cap.vht_supported && have_80mhz) { 1786 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1787 goto out_err; 1788 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1789 sband->vht_cap.cap); 1790 } 1791 1792 /* insert custom IEs that go before HE */ 1793 if (ie && ie_len) { 1794 static const u8 before_he[] = { 1795 /* 1796 * no need to list the ones split off before VHT 1797 * or generated here 1798 */ 1799 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1800 WLAN_EID_AP_CSN, 1801 /* TODO: add 11ah/11aj/11ak elements */ 1802 }; 1803 noffset = ieee80211_ie_split(ie, ie_len, 1804 before_he, ARRAY_SIZE(before_he), 1805 *offset); 1806 if (end - pos < noffset - *offset) 1807 goto out_err; 1808 memcpy(pos, ie + *offset, noffset - *offset); 1809 pos += noffset - *offset; 1810 *offset = noffset; 1811 } 1812 1813 he_cap = ieee80211_get_he_sta_cap(sband); 1814 if (he_cap) { 1815 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1816 if (!pos) 1817 goto out_err; 1818 } 1819 1820 /* 1821 * If adding more here, adjust code in main.c 1822 * that calculates local->scan_ies_len. 1823 */ 1824 1825 return pos - buffer; 1826 out_err: 1827 WARN_ONCE(1, "not enough space for preq IEs\n"); 1828 done: 1829 return pos - buffer; 1830 } 1831 1832 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1833 size_t buffer_len, 1834 struct ieee80211_scan_ies *ie_desc, 1835 const u8 *ie, size_t ie_len, 1836 u8 bands_used, u32 *rate_masks, 1837 struct cfg80211_chan_def *chandef, 1838 u32 flags) 1839 { 1840 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1841 int i; 1842 1843 memset(ie_desc, 0, sizeof(*ie_desc)); 1844 1845 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1846 if (bands_used & BIT(i)) { 1847 pos += ieee80211_build_preq_ies_band(local, 1848 buffer + pos, 1849 buffer_len - pos, 1850 ie, ie_len, i, 1851 rate_masks[i], 1852 chandef, 1853 &custom_ie_offset, 1854 flags); 1855 ie_desc->ies[i] = buffer + old_pos; 1856 ie_desc->len[i] = pos - old_pos; 1857 old_pos = pos; 1858 } 1859 } 1860 1861 /* add any remaining custom IEs */ 1862 if (ie && ie_len) { 1863 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1864 "not enough space for preq custom IEs\n")) 1865 return pos; 1866 memcpy(buffer + pos, ie + custom_ie_offset, 1867 ie_len - custom_ie_offset); 1868 ie_desc->common_ies = buffer + pos; 1869 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1870 pos += ie_len - custom_ie_offset; 1871 } 1872 1873 return pos; 1874 }; 1875 1876 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1877 const u8 *src, const u8 *dst, 1878 u32 ratemask, 1879 struct ieee80211_channel *chan, 1880 const u8 *ssid, size_t ssid_len, 1881 const u8 *ie, size_t ie_len, 1882 u32 flags) 1883 { 1884 struct ieee80211_local *local = sdata->local; 1885 struct cfg80211_chan_def chandef; 1886 struct sk_buff *skb; 1887 struct ieee80211_mgmt *mgmt; 1888 int ies_len; 1889 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1890 struct ieee80211_scan_ies dummy_ie_desc; 1891 1892 /* 1893 * Do not send DS Channel parameter for directed probe requests 1894 * in order to maximize the chance that we get a response. Some 1895 * badly-behaved APs don't respond when this parameter is included. 1896 */ 1897 chandef.width = sdata->vif.bss_conf.chandef.width; 1898 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1899 chandef.chan = NULL; 1900 else 1901 chandef.chan = chan; 1902 1903 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1904 100 + ie_len); 1905 if (!skb) 1906 return NULL; 1907 1908 rate_masks[chan->band] = ratemask; 1909 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1910 skb_tailroom(skb), &dummy_ie_desc, 1911 ie, ie_len, BIT(chan->band), 1912 rate_masks, &chandef, flags); 1913 skb_put(skb, ies_len); 1914 1915 if (dst) { 1916 mgmt = (struct ieee80211_mgmt *) skb->data; 1917 memcpy(mgmt->da, dst, ETH_ALEN); 1918 memcpy(mgmt->bssid, dst, ETH_ALEN); 1919 } 1920 1921 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1922 1923 return skb; 1924 } 1925 1926 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1927 struct ieee802_11_elems *elems, 1928 enum nl80211_band band, u32 *basic_rates) 1929 { 1930 struct ieee80211_supported_band *sband; 1931 size_t num_rates; 1932 u32 supp_rates, rate_flags; 1933 int i, j, shift; 1934 1935 sband = sdata->local->hw.wiphy->bands[band]; 1936 if (WARN_ON(!sband)) 1937 return 1; 1938 1939 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1940 shift = ieee80211_vif_get_shift(&sdata->vif); 1941 1942 num_rates = sband->n_bitrates; 1943 supp_rates = 0; 1944 for (i = 0; i < elems->supp_rates_len + 1945 elems->ext_supp_rates_len; i++) { 1946 u8 rate = 0; 1947 int own_rate; 1948 bool is_basic; 1949 if (i < elems->supp_rates_len) 1950 rate = elems->supp_rates[i]; 1951 else if (elems->ext_supp_rates) 1952 rate = elems->ext_supp_rates 1953 [i - elems->supp_rates_len]; 1954 own_rate = 5 * (rate & 0x7f); 1955 is_basic = !!(rate & 0x80); 1956 1957 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1958 continue; 1959 1960 for (j = 0; j < num_rates; j++) { 1961 int brate; 1962 if ((rate_flags & sband->bitrates[j].flags) 1963 != rate_flags) 1964 continue; 1965 1966 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1967 1 << shift); 1968 1969 if (brate == own_rate) { 1970 supp_rates |= BIT(j); 1971 if (basic_rates && is_basic) 1972 *basic_rates |= BIT(j); 1973 } 1974 } 1975 } 1976 return supp_rates; 1977 } 1978 1979 void ieee80211_stop_device(struct ieee80211_local *local) 1980 { 1981 ieee80211_led_radio(local, false); 1982 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1983 1984 cancel_work_sync(&local->reconfig_filter); 1985 1986 flush_workqueue(local->workqueue); 1987 drv_stop(local); 1988 } 1989 1990 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1991 bool aborted) 1992 { 1993 /* It's possible that we don't handle the scan completion in 1994 * time during suspend, so if it's still marked as completed 1995 * here, queue the work and flush it to clean things up. 1996 * Instead of calling the worker function directly here, we 1997 * really queue it to avoid potential races with other flows 1998 * scheduling the same work. 1999 */ 2000 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2001 /* If coming from reconfiguration failure, abort the scan so 2002 * we don't attempt to continue a partial HW scan - which is 2003 * possible otherwise if (e.g.) the 2.4 GHz portion was the 2004 * completed scan, and a 5 GHz portion is still pending. 2005 */ 2006 if (aborted) 2007 set_bit(SCAN_ABORTED, &local->scanning); 2008 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2009 flush_delayed_work(&local->scan_work); 2010 } 2011 } 2012 2013 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 2014 { 2015 struct ieee80211_sub_if_data *sdata; 2016 struct ieee80211_chanctx *ctx; 2017 2018 /* 2019 * We get here if during resume the device can't be restarted properly. 2020 * We might also get here if this happens during HW reset, which is a 2021 * slightly different situation and we need to drop all connections in 2022 * the latter case. 2023 * 2024 * Ask cfg80211 to turn off all interfaces, this will result in more 2025 * warnings but at least we'll then get into a clean stopped state. 2026 */ 2027 2028 local->resuming = false; 2029 local->suspended = false; 2030 local->in_reconfig = false; 2031 2032 ieee80211_flush_completed_scan(local, true); 2033 2034 /* scheduled scan clearly can't be running any more, but tell 2035 * cfg80211 and clear local state 2036 */ 2037 ieee80211_sched_scan_end(local); 2038 2039 list_for_each_entry(sdata, &local->interfaces, list) 2040 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2041 2042 /* Mark channel contexts as not being in the driver any more to avoid 2043 * removing them from the driver during the shutdown process... 2044 */ 2045 mutex_lock(&local->chanctx_mtx); 2046 list_for_each_entry(ctx, &local->chanctx_list, list) 2047 ctx->driver_present = false; 2048 mutex_unlock(&local->chanctx_mtx); 2049 2050 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2051 } 2052 2053 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2054 struct ieee80211_sub_if_data *sdata) 2055 { 2056 struct ieee80211_chanctx_conf *conf; 2057 struct ieee80211_chanctx *ctx; 2058 2059 if (!local->use_chanctx) 2060 return; 2061 2062 mutex_lock(&local->chanctx_mtx); 2063 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2064 lockdep_is_held(&local->chanctx_mtx)); 2065 if (conf) { 2066 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2067 drv_assign_vif_chanctx(local, sdata, ctx); 2068 } 2069 mutex_unlock(&local->chanctx_mtx); 2070 } 2071 2072 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2073 { 2074 struct ieee80211_local *local = sdata->local; 2075 struct sta_info *sta; 2076 2077 /* add STAs back */ 2078 mutex_lock(&local->sta_mtx); 2079 list_for_each_entry(sta, &local->sta_list, list) { 2080 enum ieee80211_sta_state state; 2081 2082 if (!sta->uploaded || sta->sdata != sdata) 2083 continue; 2084 2085 for (state = IEEE80211_STA_NOTEXIST; 2086 state < sta->sta_state; state++) 2087 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2088 state + 1)); 2089 } 2090 mutex_unlock(&local->sta_mtx); 2091 } 2092 2093 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2094 { 2095 struct cfg80211_nan_func *func, **funcs; 2096 int res, id, i = 0; 2097 2098 res = drv_start_nan(sdata->local, sdata, 2099 &sdata->u.nan.conf); 2100 if (WARN_ON(res)) 2101 return res; 2102 2103 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2104 sizeof(*funcs), 2105 GFP_KERNEL); 2106 if (!funcs) 2107 return -ENOMEM; 2108 2109 /* Add all the functions: 2110 * This is a little bit ugly. We need to call a potentially sleeping 2111 * callback for each NAN function, so we can't hold the spinlock. 2112 */ 2113 spin_lock_bh(&sdata->u.nan.func_lock); 2114 2115 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2116 funcs[i++] = func; 2117 2118 spin_unlock_bh(&sdata->u.nan.func_lock); 2119 2120 for (i = 0; funcs[i]; i++) { 2121 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2122 if (WARN_ON(res)) 2123 ieee80211_nan_func_terminated(&sdata->vif, 2124 funcs[i]->instance_id, 2125 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2126 GFP_KERNEL); 2127 } 2128 2129 kfree(funcs); 2130 2131 return 0; 2132 } 2133 2134 int ieee80211_reconfig(struct ieee80211_local *local) 2135 { 2136 struct ieee80211_hw *hw = &local->hw; 2137 struct ieee80211_sub_if_data *sdata; 2138 struct ieee80211_chanctx *ctx; 2139 struct sta_info *sta; 2140 int res, i; 2141 bool reconfig_due_to_wowlan = false; 2142 struct ieee80211_sub_if_data *sched_scan_sdata; 2143 struct cfg80211_sched_scan_request *sched_scan_req; 2144 bool sched_scan_stopped = false; 2145 bool suspended = local->suspended; 2146 2147 /* nothing to do if HW shouldn't run */ 2148 if (!local->open_count) 2149 goto wake_up; 2150 2151 #ifdef CONFIG_PM 2152 if (suspended) 2153 local->resuming = true; 2154 2155 if (local->wowlan) { 2156 /* 2157 * In the wowlan case, both mac80211 and the device 2158 * are functional when the resume op is called, so 2159 * clear local->suspended so the device could operate 2160 * normally (e.g. pass rx frames). 2161 */ 2162 local->suspended = false; 2163 res = drv_resume(local); 2164 local->wowlan = false; 2165 if (res < 0) { 2166 local->resuming = false; 2167 return res; 2168 } 2169 if (res == 0) 2170 goto wake_up; 2171 WARN_ON(res > 1); 2172 /* 2173 * res is 1, which means the driver requested 2174 * to go through a regular reset on wakeup. 2175 * restore local->suspended in this case. 2176 */ 2177 reconfig_due_to_wowlan = true; 2178 local->suspended = true; 2179 } 2180 #endif 2181 2182 /* 2183 * In case of hw_restart during suspend (without wowlan), 2184 * cancel restart work, as we are reconfiguring the device 2185 * anyway. 2186 * Note that restart_work is scheduled on a frozen workqueue, 2187 * so we can't deadlock in this case. 2188 */ 2189 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2190 cancel_work_sync(&local->restart_work); 2191 2192 local->started = false; 2193 2194 /* 2195 * Upon resume hardware can sometimes be goofy due to 2196 * various platform / driver / bus issues, so restarting 2197 * the device may at times not work immediately. Propagate 2198 * the error. 2199 */ 2200 res = drv_start(local); 2201 if (res) { 2202 if (suspended) 2203 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2204 else 2205 WARN(1, "Hardware became unavailable during restart.\n"); 2206 ieee80211_handle_reconfig_failure(local); 2207 return res; 2208 } 2209 2210 /* setup fragmentation threshold */ 2211 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2212 2213 /* setup RTS threshold */ 2214 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2215 2216 /* reset coverage class */ 2217 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2218 2219 ieee80211_led_radio(local, true); 2220 ieee80211_mod_tpt_led_trig(local, 2221 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2222 2223 /* add interfaces */ 2224 sdata = rtnl_dereference(local->monitor_sdata); 2225 if (sdata) { 2226 /* in HW restart it exists already */ 2227 WARN_ON(local->resuming); 2228 res = drv_add_interface(local, sdata); 2229 if (WARN_ON(res)) { 2230 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2231 synchronize_net(); 2232 kfree(sdata); 2233 } 2234 } 2235 2236 list_for_each_entry(sdata, &local->interfaces, list) { 2237 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2238 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2239 ieee80211_sdata_running(sdata)) { 2240 res = drv_add_interface(local, sdata); 2241 if (WARN_ON(res)) 2242 break; 2243 } 2244 } 2245 2246 /* If adding any of the interfaces failed above, roll back and 2247 * report failure. 2248 */ 2249 if (res) { 2250 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2251 list) 2252 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2253 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2254 ieee80211_sdata_running(sdata)) 2255 drv_remove_interface(local, sdata); 2256 ieee80211_handle_reconfig_failure(local); 2257 return res; 2258 } 2259 2260 /* add channel contexts */ 2261 if (local->use_chanctx) { 2262 mutex_lock(&local->chanctx_mtx); 2263 list_for_each_entry(ctx, &local->chanctx_list, list) 2264 if (ctx->replace_state != 2265 IEEE80211_CHANCTX_REPLACES_OTHER) 2266 WARN_ON(drv_add_chanctx(local, ctx)); 2267 mutex_unlock(&local->chanctx_mtx); 2268 2269 sdata = rtnl_dereference(local->monitor_sdata); 2270 if (sdata && ieee80211_sdata_running(sdata)) 2271 ieee80211_assign_chanctx(local, sdata); 2272 } 2273 2274 /* reconfigure hardware */ 2275 ieee80211_hw_config(local, ~0); 2276 2277 ieee80211_configure_filter(local); 2278 2279 /* Finally also reconfigure all the BSS information */ 2280 list_for_each_entry(sdata, &local->interfaces, list) { 2281 u32 changed; 2282 2283 if (!ieee80211_sdata_running(sdata)) 2284 continue; 2285 2286 ieee80211_assign_chanctx(local, sdata); 2287 2288 switch (sdata->vif.type) { 2289 case NL80211_IFTYPE_AP_VLAN: 2290 case NL80211_IFTYPE_MONITOR: 2291 break; 2292 case NL80211_IFTYPE_ADHOC: 2293 if (sdata->vif.bss_conf.ibss_joined) 2294 WARN_ON(drv_join_ibss(local, sdata)); 2295 /* fall through */ 2296 default: 2297 ieee80211_reconfig_stations(sdata); 2298 /* fall through */ 2299 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2300 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2301 drv_conf_tx(local, sdata, i, 2302 &sdata->tx_conf[i]); 2303 break; 2304 } 2305 2306 /* common change flags for all interface types */ 2307 changed = BSS_CHANGED_ERP_CTS_PROT | 2308 BSS_CHANGED_ERP_PREAMBLE | 2309 BSS_CHANGED_ERP_SLOT | 2310 BSS_CHANGED_HT | 2311 BSS_CHANGED_BASIC_RATES | 2312 BSS_CHANGED_BEACON_INT | 2313 BSS_CHANGED_BSSID | 2314 BSS_CHANGED_CQM | 2315 BSS_CHANGED_QOS | 2316 BSS_CHANGED_IDLE | 2317 BSS_CHANGED_TXPOWER | 2318 BSS_CHANGED_MCAST_RATE; 2319 2320 if (sdata->vif.mu_mimo_owner) 2321 changed |= BSS_CHANGED_MU_GROUPS; 2322 2323 switch (sdata->vif.type) { 2324 case NL80211_IFTYPE_STATION: 2325 changed |= BSS_CHANGED_ASSOC | 2326 BSS_CHANGED_ARP_FILTER | 2327 BSS_CHANGED_PS; 2328 2329 /* Re-send beacon info report to the driver */ 2330 if (sdata->u.mgd.have_beacon) 2331 changed |= BSS_CHANGED_BEACON_INFO; 2332 2333 if (sdata->vif.bss_conf.max_idle_period || 2334 sdata->vif.bss_conf.protected_keep_alive) 2335 changed |= BSS_CHANGED_KEEP_ALIVE; 2336 2337 sdata_lock(sdata); 2338 ieee80211_bss_info_change_notify(sdata, changed); 2339 sdata_unlock(sdata); 2340 break; 2341 case NL80211_IFTYPE_OCB: 2342 changed |= BSS_CHANGED_OCB; 2343 ieee80211_bss_info_change_notify(sdata, changed); 2344 break; 2345 case NL80211_IFTYPE_ADHOC: 2346 changed |= BSS_CHANGED_IBSS; 2347 /* fall through */ 2348 case NL80211_IFTYPE_AP: 2349 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2350 2351 if (sdata->vif.bss_conf.ftm_responder == 1 && 2352 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2353 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2354 changed |= BSS_CHANGED_FTM_RESPONDER; 2355 2356 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2357 changed |= BSS_CHANGED_AP_PROBE_RESP; 2358 2359 if (rcu_access_pointer(sdata->u.ap.beacon)) 2360 drv_start_ap(local, sdata); 2361 } 2362 2363 /* fall through */ 2364 case NL80211_IFTYPE_MESH_POINT: 2365 if (sdata->vif.bss_conf.enable_beacon) { 2366 changed |= BSS_CHANGED_BEACON | 2367 BSS_CHANGED_BEACON_ENABLED; 2368 ieee80211_bss_info_change_notify(sdata, changed); 2369 } 2370 break; 2371 case NL80211_IFTYPE_NAN: 2372 res = ieee80211_reconfig_nan(sdata); 2373 if (res < 0) { 2374 ieee80211_handle_reconfig_failure(local); 2375 return res; 2376 } 2377 break; 2378 case NL80211_IFTYPE_WDS: 2379 case NL80211_IFTYPE_AP_VLAN: 2380 case NL80211_IFTYPE_MONITOR: 2381 case NL80211_IFTYPE_P2P_DEVICE: 2382 /* nothing to do */ 2383 break; 2384 case NL80211_IFTYPE_UNSPECIFIED: 2385 case NUM_NL80211_IFTYPES: 2386 case NL80211_IFTYPE_P2P_CLIENT: 2387 case NL80211_IFTYPE_P2P_GO: 2388 WARN_ON(1); 2389 break; 2390 } 2391 } 2392 2393 ieee80211_recalc_ps(local); 2394 2395 /* 2396 * The sta might be in psm against the ap (e.g. because 2397 * this was the state before a hw restart), so we 2398 * explicitly send a null packet in order to make sure 2399 * it'll sync against the ap (and get out of psm). 2400 */ 2401 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2402 list_for_each_entry(sdata, &local->interfaces, list) { 2403 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2404 continue; 2405 if (!sdata->u.mgd.associated) 2406 continue; 2407 2408 ieee80211_send_nullfunc(local, sdata, false); 2409 } 2410 } 2411 2412 /* APs are now beaconing, add back stations */ 2413 mutex_lock(&local->sta_mtx); 2414 list_for_each_entry(sta, &local->sta_list, list) { 2415 enum ieee80211_sta_state state; 2416 2417 if (!sta->uploaded) 2418 continue; 2419 2420 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2421 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2422 continue; 2423 2424 for (state = IEEE80211_STA_NOTEXIST; 2425 state < sta->sta_state; state++) 2426 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2427 state + 1)); 2428 } 2429 mutex_unlock(&local->sta_mtx); 2430 2431 /* add back keys */ 2432 list_for_each_entry(sdata, &local->interfaces, list) 2433 ieee80211_reenable_keys(sdata); 2434 2435 /* Reconfigure sched scan if it was interrupted by FW restart */ 2436 mutex_lock(&local->mtx); 2437 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2438 lockdep_is_held(&local->mtx)); 2439 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2440 lockdep_is_held(&local->mtx)); 2441 if (sched_scan_sdata && sched_scan_req) 2442 /* 2443 * Sched scan stopped, but we don't want to report it. Instead, 2444 * we're trying to reschedule. However, if more than one scan 2445 * plan was set, we cannot reschedule since we don't know which 2446 * scan plan was currently running (and some scan plans may have 2447 * already finished). 2448 */ 2449 if (sched_scan_req->n_scan_plans > 1 || 2450 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2451 sched_scan_req)) { 2452 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2453 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2454 sched_scan_stopped = true; 2455 } 2456 mutex_unlock(&local->mtx); 2457 2458 if (sched_scan_stopped) 2459 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2460 2461 wake_up: 2462 2463 if (local->monitors == local->open_count && local->monitors > 0) 2464 ieee80211_add_virtual_monitor(local); 2465 2466 /* 2467 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2468 * sessions can be established after a resume. 2469 * 2470 * Also tear down aggregation sessions since reconfiguring 2471 * them in a hardware restart scenario is not easily done 2472 * right now, and the hardware will have lost information 2473 * about the sessions, but we and the AP still think they 2474 * are active. This is really a workaround though. 2475 */ 2476 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2477 mutex_lock(&local->sta_mtx); 2478 2479 list_for_each_entry(sta, &local->sta_list, list) { 2480 if (!local->resuming) 2481 ieee80211_sta_tear_down_BA_sessions( 2482 sta, AGG_STOP_LOCAL_REQUEST); 2483 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2484 } 2485 2486 mutex_unlock(&local->sta_mtx); 2487 } 2488 2489 if (local->in_reconfig) { 2490 local->in_reconfig = false; 2491 barrier(); 2492 2493 /* Restart deferred ROCs */ 2494 mutex_lock(&local->mtx); 2495 ieee80211_start_next_roc(local); 2496 mutex_unlock(&local->mtx); 2497 2498 /* Requeue all works */ 2499 list_for_each_entry(sdata, &local->interfaces, list) 2500 ieee80211_queue_work(&local->hw, &sdata->work); 2501 } 2502 2503 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2504 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2505 false); 2506 2507 /* 2508 * If this is for hw restart things are still running. 2509 * We may want to change that later, however. 2510 */ 2511 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2512 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2513 2514 if (!suspended) 2515 return 0; 2516 2517 #ifdef CONFIG_PM 2518 /* first set suspended false, then resuming */ 2519 local->suspended = false; 2520 mb(); 2521 local->resuming = false; 2522 2523 ieee80211_flush_completed_scan(local, false); 2524 2525 if (local->open_count && !reconfig_due_to_wowlan) 2526 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2527 2528 list_for_each_entry(sdata, &local->interfaces, list) { 2529 if (!ieee80211_sdata_running(sdata)) 2530 continue; 2531 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2532 ieee80211_sta_restart(sdata); 2533 } 2534 2535 mod_timer(&local->sta_cleanup, jiffies + 1); 2536 #else 2537 WARN_ON(1); 2538 #endif 2539 2540 return 0; 2541 } 2542 2543 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2544 { 2545 struct ieee80211_sub_if_data *sdata; 2546 struct ieee80211_local *local; 2547 struct ieee80211_key *key; 2548 2549 if (WARN_ON(!vif)) 2550 return; 2551 2552 sdata = vif_to_sdata(vif); 2553 local = sdata->local; 2554 2555 if (WARN_ON(!local->resuming)) 2556 return; 2557 2558 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2559 return; 2560 2561 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2562 2563 mutex_lock(&local->key_mtx); 2564 list_for_each_entry(key, &sdata->key_list, list) 2565 key->flags |= KEY_FLAG_TAINTED; 2566 mutex_unlock(&local->key_mtx); 2567 } 2568 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2569 2570 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2571 { 2572 struct ieee80211_local *local = sdata->local; 2573 struct ieee80211_chanctx_conf *chanctx_conf; 2574 struct ieee80211_chanctx *chanctx; 2575 2576 mutex_lock(&local->chanctx_mtx); 2577 2578 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2579 lockdep_is_held(&local->chanctx_mtx)); 2580 2581 /* 2582 * This function can be called from a work, thus it may be possible 2583 * that the chanctx_conf is removed (due to a disconnection, for 2584 * example). 2585 * So nothing should be done in such case. 2586 */ 2587 if (!chanctx_conf) 2588 goto unlock; 2589 2590 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2591 ieee80211_recalc_smps_chanctx(local, chanctx); 2592 unlock: 2593 mutex_unlock(&local->chanctx_mtx); 2594 } 2595 2596 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2597 { 2598 struct ieee80211_local *local = sdata->local; 2599 struct ieee80211_chanctx_conf *chanctx_conf; 2600 struct ieee80211_chanctx *chanctx; 2601 2602 mutex_lock(&local->chanctx_mtx); 2603 2604 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2605 lockdep_is_held(&local->chanctx_mtx)); 2606 2607 if (WARN_ON_ONCE(!chanctx_conf)) 2608 goto unlock; 2609 2610 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2611 ieee80211_recalc_chanctx_min_def(local, chanctx); 2612 unlock: 2613 mutex_unlock(&local->chanctx_mtx); 2614 } 2615 2616 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2617 { 2618 size_t pos = offset; 2619 2620 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2621 pos += 2 + ies[pos + 1]; 2622 2623 return pos; 2624 } 2625 2626 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2627 int rssi_min_thold, 2628 int rssi_max_thold) 2629 { 2630 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2631 2632 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2633 return; 2634 2635 /* 2636 * Scale up threshold values before storing it, as the RSSI averaging 2637 * algorithm uses a scaled up value as well. Change this scaling 2638 * factor if the RSSI averaging algorithm changes. 2639 */ 2640 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2641 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2642 } 2643 2644 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2645 int rssi_min_thold, 2646 int rssi_max_thold) 2647 { 2648 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2649 2650 WARN_ON(rssi_min_thold == rssi_max_thold || 2651 rssi_min_thold > rssi_max_thold); 2652 2653 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2654 rssi_max_thold); 2655 } 2656 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2657 2658 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2659 { 2660 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2661 2662 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2663 } 2664 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2665 2666 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2667 u16 cap) 2668 { 2669 __le16 tmp; 2670 2671 *pos++ = WLAN_EID_HT_CAPABILITY; 2672 *pos++ = sizeof(struct ieee80211_ht_cap); 2673 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2674 2675 /* capability flags */ 2676 tmp = cpu_to_le16(cap); 2677 memcpy(pos, &tmp, sizeof(u16)); 2678 pos += sizeof(u16); 2679 2680 /* AMPDU parameters */ 2681 *pos++ = ht_cap->ampdu_factor | 2682 (ht_cap->ampdu_density << 2683 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2684 2685 /* MCS set */ 2686 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2687 pos += sizeof(ht_cap->mcs); 2688 2689 /* extended capabilities */ 2690 pos += sizeof(__le16); 2691 2692 /* BF capabilities */ 2693 pos += sizeof(__le32); 2694 2695 /* antenna selection */ 2696 pos += sizeof(u8); 2697 2698 return pos; 2699 } 2700 2701 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2702 u32 cap) 2703 { 2704 __le32 tmp; 2705 2706 *pos++ = WLAN_EID_VHT_CAPABILITY; 2707 *pos++ = sizeof(struct ieee80211_vht_cap); 2708 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2709 2710 /* capability flags */ 2711 tmp = cpu_to_le32(cap); 2712 memcpy(pos, &tmp, sizeof(u32)); 2713 pos += sizeof(u32); 2714 2715 /* VHT MCS set */ 2716 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2717 pos += sizeof(vht_cap->vht_mcs); 2718 2719 return pos; 2720 } 2721 2722 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 2723 { 2724 const struct ieee80211_sta_he_cap *he_cap; 2725 struct ieee80211_supported_band *sband; 2726 u8 n; 2727 2728 sband = ieee80211_get_sband(sdata); 2729 if (!sband) 2730 return 0; 2731 2732 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 2733 if (!he_cap) 2734 return 0; 2735 2736 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2737 return 2 + 1 + 2738 sizeof(he_cap->he_cap_elem) + n + 2739 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2740 he_cap->he_cap_elem.phy_cap_info); 2741 } 2742 2743 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2744 const struct ieee80211_sta_he_cap *he_cap, 2745 u8 *end) 2746 { 2747 u8 n; 2748 u8 ie_len; 2749 u8 *orig_pos = pos; 2750 2751 /* Make sure we have place for the IE */ 2752 /* 2753 * TODO: the 1 added is because this temporarily is under the EXTENSION 2754 * IE. Get rid of it when it moves. 2755 */ 2756 if (!he_cap) 2757 return orig_pos; 2758 2759 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2760 ie_len = 2 + 1 + 2761 sizeof(he_cap->he_cap_elem) + n + 2762 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2763 he_cap->he_cap_elem.phy_cap_info); 2764 2765 if ((end - pos) < ie_len) 2766 return orig_pos; 2767 2768 *pos++ = WLAN_EID_EXTENSION; 2769 pos++; /* We'll set the size later below */ 2770 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2771 2772 /* Fixed data */ 2773 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2774 pos += sizeof(he_cap->he_cap_elem); 2775 2776 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2777 pos += n; 2778 2779 /* Check if PPE Threshold should be present */ 2780 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2781 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2782 goto end; 2783 2784 /* 2785 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2786 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2787 */ 2788 n = hweight8(he_cap->ppe_thres[0] & 2789 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2790 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2791 IEEE80211_PPE_THRES_NSS_POS)); 2792 2793 /* 2794 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2795 * total size. 2796 */ 2797 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2798 n = DIV_ROUND_UP(n, 8); 2799 2800 /* Copy PPE Thresholds */ 2801 memcpy(pos, &he_cap->ppe_thres, n); 2802 pos += n; 2803 2804 end: 2805 orig_pos[1] = (pos - orig_pos) - 2; 2806 return pos; 2807 } 2808 2809 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2810 const struct cfg80211_chan_def *chandef, 2811 u16 prot_mode, bool rifs_mode) 2812 { 2813 struct ieee80211_ht_operation *ht_oper; 2814 /* Build HT Information */ 2815 *pos++ = WLAN_EID_HT_OPERATION; 2816 *pos++ = sizeof(struct ieee80211_ht_operation); 2817 ht_oper = (struct ieee80211_ht_operation *)pos; 2818 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2819 chandef->chan->center_freq); 2820 switch (chandef->width) { 2821 case NL80211_CHAN_WIDTH_160: 2822 case NL80211_CHAN_WIDTH_80P80: 2823 case NL80211_CHAN_WIDTH_80: 2824 case NL80211_CHAN_WIDTH_40: 2825 if (chandef->center_freq1 > chandef->chan->center_freq) 2826 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2827 else 2828 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2829 break; 2830 default: 2831 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2832 break; 2833 } 2834 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2835 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2836 chandef->width != NL80211_CHAN_WIDTH_20) 2837 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2838 2839 if (rifs_mode) 2840 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2841 2842 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2843 ht_oper->stbc_param = 0x0000; 2844 2845 /* It seems that Basic MCS set and Supported MCS set 2846 are identical for the first 10 bytes */ 2847 memset(&ht_oper->basic_set, 0, 16); 2848 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2849 2850 return pos + sizeof(struct ieee80211_ht_operation); 2851 } 2852 2853 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2854 const struct cfg80211_chan_def *chandef) 2855 { 2856 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2857 *pos++ = 3; /* IE length */ 2858 /* New channel width */ 2859 switch (chandef->width) { 2860 case NL80211_CHAN_WIDTH_80: 2861 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2862 break; 2863 case NL80211_CHAN_WIDTH_160: 2864 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2865 break; 2866 case NL80211_CHAN_WIDTH_80P80: 2867 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2868 break; 2869 default: 2870 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2871 } 2872 2873 /* new center frequency segment 0 */ 2874 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2875 /* new center frequency segment 1 */ 2876 if (chandef->center_freq2) 2877 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2878 else 2879 *pos++ = 0; 2880 } 2881 2882 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2883 const struct cfg80211_chan_def *chandef) 2884 { 2885 struct ieee80211_vht_operation *vht_oper; 2886 2887 *pos++ = WLAN_EID_VHT_OPERATION; 2888 *pos++ = sizeof(struct ieee80211_vht_operation); 2889 vht_oper = (struct ieee80211_vht_operation *)pos; 2890 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2891 chandef->center_freq1); 2892 if (chandef->center_freq2) 2893 vht_oper->center_freq_seg1_idx = 2894 ieee80211_frequency_to_channel(chandef->center_freq2); 2895 else 2896 vht_oper->center_freq_seg1_idx = 0x00; 2897 2898 switch (chandef->width) { 2899 case NL80211_CHAN_WIDTH_160: 2900 /* 2901 * Convert 160 MHz channel width to new style as interop 2902 * workaround. 2903 */ 2904 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2905 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2906 if (chandef->chan->center_freq < chandef->center_freq1) 2907 vht_oper->center_freq_seg0_idx -= 8; 2908 else 2909 vht_oper->center_freq_seg0_idx += 8; 2910 break; 2911 case NL80211_CHAN_WIDTH_80P80: 2912 /* 2913 * Convert 80+80 MHz channel width to new style as interop 2914 * workaround. 2915 */ 2916 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2917 break; 2918 case NL80211_CHAN_WIDTH_80: 2919 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2920 break; 2921 default: 2922 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2923 break; 2924 } 2925 2926 /* don't require special VHT peer rates */ 2927 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2928 2929 return pos + sizeof(struct ieee80211_vht_operation); 2930 } 2931 2932 u8 *ieee80211_ie_build_he_oper(u8 *pos) 2933 { 2934 struct ieee80211_he_operation *he_oper; 2935 u32 he_oper_params; 2936 2937 *pos++ = WLAN_EID_EXTENSION; 2938 *pos++ = 1 + sizeof(struct ieee80211_he_operation); 2939 *pos++ = WLAN_EID_EXT_HE_OPERATION; 2940 2941 he_oper_params = 0; 2942 he_oper_params |= u32_encode_bits(1023, /* disabled */ 2943 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 2944 he_oper_params |= u32_encode_bits(1, 2945 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 2946 he_oper_params |= u32_encode_bits(1, 2947 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 2948 2949 he_oper = (struct ieee80211_he_operation *)pos; 2950 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 2951 2952 /* don't require special HE peer rates */ 2953 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 2954 2955 /* TODO add VHT operational and 6GHz operational subelement? */ 2956 2957 return pos + sizeof(struct ieee80211_vht_operation); 2958 } 2959 2960 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2961 struct cfg80211_chan_def *chandef) 2962 { 2963 enum nl80211_channel_type channel_type; 2964 2965 if (!ht_oper) 2966 return false; 2967 2968 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2969 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2970 channel_type = NL80211_CHAN_HT20; 2971 break; 2972 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2973 channel_type = NL80211_CHAN_HT40PLUS; 2974 break; 2975 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2976 channel_type = NL80211_CHAN_HT40MINUS; 2977 break; 2978 default: 2979 channel_type = NL80211_CHAN_NO_HT; 2980 return false; 2981 } 2982 2983 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2984 return true; 2985 } 2986 2987 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, 2988 const struct ieee80211_vht_operation *oper, 2989 const struct ieee80211_ht_operation *htop, 2990 struct cfg80211_chan_def *chandef) 2991 { 2992 struct cfg80211_chan_def new = *chandef; 2993 int cf0, cf1; 2994 int ccfs0, ccfs1, ccfs2; 2995 int ccf0, ccf1; 2996 u32 vht_cap; 2997 bool support_80_80 = false; 2998 bool support_160 = false; 2999 3000 if (!oper || !htop) 3001 return false; 3002 3003 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3004 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3005 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3006 support_80_80 = ((vht_cap & 3007 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3008 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3009 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3010 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3011 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3012 ccfs0 = oper->center_freq_seg0_idx; 3013 ccfs1 = oper->center_freq_seg1_idx; 3014 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3015 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3016 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3017 3018 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */ 3019 ccf0 = ccfs0; 3020 ccf1 = ccfs1; 3021 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3022 ccf1 = ccfs2; 3023 3024 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3025 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3026 3027 switch (oper->chan_width) { 3028 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3029 /* just use HT information directly */ 3030 break; 3031 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3032 new.width = NL80211_CHAN_WIDTH_80; 3033 new.center_freq1 = cf0; 3034 /* If needed, adjust based on the newer interop workaround. */ 3035 if (ccf1) { 3036 unsigned int diff; 3037 3038 diff = abs(ccf1 - ccf0); 3039 if ((diff == 8) && support_160) { 3040 new.width = NL80211_CHAN_WIDTH_160; 3041 new.center_freq1 = cf1; 3042 } else if ((diff > 8) && support_80_80) { 3043 new.width = NL80211_CHAN_WIDTH_80P80; 3044 new.center_freq2 = cf1; 3045 } 3046 } 3047 break; 3048 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3049 /* deprecated encoding */ 3050 new.width = NL80211_CHAN_WIDTH_160; 3051 new.center_freq1 = cf0; 3052 break; 3053 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3054 /* deprecated encoding */ 3055 new.width = NL80211_CHAN_WIDTH_80P80; 3056 new.center_freq1 = cf0; 3057 new.center_freq2 = cf1; 3058 break; 3059 default: 3060 return false; 3061 } 3062 3063 if (!cfg80211_chandef_valid(&new)) 3064 return false; 3065 3066 *chandef = new; 3067 return true; 3068 } 3069 3070 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 3071 const struct ieee80211_supported_band *sband, 3072 const u8 *srates, int srates_len, u32 *rates) 3073 { 3074 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 3075 int shift = ieee80211_chandef_get_shift(chandef); 3076 struct ieee80211_rate *br; 3077 int brate, rate, i, j, count = 0; 3078 3079 *rates = 0; 3080 3081 for (i = 0; i < srates_len; i++) { 3082 rate = srates[i] & 0x7f; 3083 3084 for (j = 0; j < sband->n_bitrates; j++) { 3085 br = &sband->bitrates[j]; 3086 if ((rate_flags & br->flags) != rate_flags) 3087 continue; 3088 3089 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3090 if (brate == rate) { 3091 *rates |= BIT(j); 3092 count++; 3093 break; 3094 } 3095 } 3096 } 3097 return count; 3098 } 3099 3100 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3101 struct sk_buff *skb, bool need_basic, 3102 enum nl80211_band band) 3103 { 3104 struct ieee80211_local *local = sdata->local; 3105 struct ieee80211_supported_band *sband; 3106 int rate, shift; 3107 u8 i, rates, *pos; 3108 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3109 u32 rate_flags; 3110 3111 shift = ieee80211_vif_get_shift(&sdata->vif); 3112 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3113 sband = local->hw.wiphy->bands[band]; 3114 rates = 0; 3115 for (i = 0; i < sband->n_bitrates; i++) { 3116 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3117 continue; 3118 rates++; 3119 } 3120 if (rates > 8) 3121 rates = 8; 3122 3123 if (skb_tailroom(skb) < rates + 2) 3124 return -ENOMEM; 3125 3126 pos = skb_put(skb, rates + 2); 3127 *pos++ = WLAN_EID_SUPP_RATES; 3128 *pos++ = rates; 3129 for (i = 0; i < rates; i++) { 3130 u8 basic = 0; 3131 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3132 continue; 3133 3134 if (need_basic && basic_rates & BIT(i)) 3135 basic = 0x80; 3136 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3137 5 * (1 << shift)); 3138 *pos++ = basic | (u8) rate; 3139 } 3140 3141 return 0; 3142 } 3143 3144 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3145 struct sk_buff *skb, bool need_basic, 3146 enum nl80211_band band) 3147 { 3148 struct ieee80211_local *local = sdata->local; 3149 struct ieee80211_supported_band *sband; 3150 int rate, shift; 3151 u8 i, exrates, *pos; 3152 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3153 u32 rate_flags; 3154 3155 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3156 shift = ieee80211_vif_get_shift(&sdata->vif); 3157 3158 sband = local->hw.wiphy->bands[band]; 3159 exrates = 0; 3160 for (i = 0; i < sband->n_bitrates; i++) { 3161 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3162 continue; 3163 exrates++; 3164 } 3165 3166 if (exrates > 8) 3167 exrates -= 8; 3168 else 3169 exrates = 0; 3170 3171 if (skb_tailroom(skb) < exrates + 2) 3172 return -ENOMEM; 3173 3174 if (exrates) { 3175 pos = skb_put(skb, exrates + 2); 3176 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3177 *pos++ = exrates; 3178 for (i = 8; i < sband->n_bitrates; i++) { 3179 u8 basic = 0; 3180 if ((rate_flags & sband->bitrates[i].flags) 3181 != rate_flags) 3182 continue; 3183 if (need_basic && basic_rates & BIT(i)) 3184 basic = 0x80; 3185 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3186 5 * (1 << shift)); 3187 *pos++ = basic | (u8) rate; 3188 } 3189 } 3190 return 0; 3191 } 3192 3193 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3194 { 3195 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3197 3198 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 3199 /* non-managed type inferfaces */ 3200 return 0; 3201 } 3202 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3203 } 3204 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3205 3206 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3207 { 3208 if (!mcs) 3209 return 1; 3210 3211 /* TODO: consider rx_highest */ 3212 3213 if (mcs->rx_mask[3]) 3214 return 4; 3215 if (mcs->rx_mask[2]) 3216 return 3; 3217 if (mcs->rx_mask[1]) 3218 return 2; 3219 return 1; 3220 } 3221 3222 /** 3223 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3224 * @local: mac80211 hw info struct 3225 * @status: RX status 3226 * @mpdu_len: total MPDU length (including FCS) 3227 * @mpdu_offset: offset into MPDU to calculate timestamp at 3228 * 3229 * This function calculates the RX timestamp at the given MPDU offset, taking 3230 * into account what the RX timestamp was. An offset of 0 will just normalize 3231 * the timestamp to TSF at beginning of MPDU reception. 3232 */ 3233 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3234 struct ieee80211_rx_status *status, 3235 unsigned int mpdu_len, 3236 unsigned int mpdu_offset) 3237 { 3238 u64 ts = status->mactime; 3239 struct rate_info ri; 3240 u16 rate; 3241 3242 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3243 return 0; 3244 3245 memset(&ri, 0, sizeof(ri)); 3246 3247 ri.bw = status->bw; 3248 3249 /* Fill cfg80211 rate info */ 3250 switch (status->encoding) { 3251 case RX_ENC_HT: 3252 ri.mcs = status->rate_idx; 3253 ri.flags |= RATE_INFO_FLAGS_MCS; 3254 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3255 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3256 break; 3257 case RX_ENC_VHT: 3258 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3259 ri.mcs = status->rate_idx; 3260 ri.nss = status->nss; 3261 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3262 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3263 break; 3264 default: 3265 WARN_ON(1); 3266 /* fall through */ 3267 case RX_ENC_LEGACY: { 3268 struct ieee80211_supported_band *sband; 3269 int shift = 0; 3270 int bitrate; 3271 3272 switch (status->bw) { 3273 case RATE_INFO_BW_10: 3274 shift = 1; 3275 break; 3276 case RATE_INFO_BW_5: 3277 shift = 2; 3278 break; 3279 } 3280 3281 sband = local->hw.wiphy->bands[status->band]; 3282 bitrate = sband->bitrates[status->rate_idx].bitrate; 3283 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 3284 3285 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3286 /* TODO: handle HT/VHT preambles */ 3287 if (status->band == NL80211_BAND_5GHZ) { 3288 ts += 20 << shift; 3289 mpdu_offset += 2; 3290 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3291 ts += 96; 3292 } else { 3293 ts += 192; 3294 } 3295 } 3296 break; 3297 } 3298 } 3299 3300 rate = cfg80211_calculate_bitrate(&ri); 3301 if (WARN_ONCE(!rate, 3302 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3303 (unsigned long long)status->flag, status->rate_idx, 3304 status->nss)) 3305 return 0; 3306 3307 /* rewind from end of MPDU */ 3308 if (status->flag & RX_FLAG_MACTIME_END) 3309 ts -= mpdu_len * 8 * 10 / rate; 3310 3311 ts += mpdu_offset * 8 * 10 / rate; 3312 3313 return ts; 3314 } 3315 3316 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 3317 { 3318 struct ieee80211_sub_if_data *sdata; 3319 struct cfg80211_chan_def chandef; 3320 3321 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 3322 ASSERT_RTNL(); 3323 3324 mutex_lock(&local->mtx); 3325 list_for_each_entry(sdata, &local->interfaces, list) { 3326 /* it might be waiting for the local->mtx, but then 3327 * by the time it gets it, sdata->wdev.cac_started 3328 * will no longer be true 3329 */ 3330 cancel_delayed_work(&sdata->dfs_cac_timer_work); 3331 3332 if (sdata->wdev.cac_started) { 3333 chandef = sdata->vif.bss_conf.chandef; 3334 ieee80211_vif_release_channel(sdata); 3335 cfg80211_cac_event(sdata->dev, 3336 &chandef, 3337 NL80211_RADAR_CAC_ABORTED, 3338 GFP_KERNEL); 3339 } 3340 } 3341 mutex_unlock(&local->mtx); 3342 } 3343 3344 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 3345 { 3346 struct ieee80211_local *local = 3347 container_of(work, struct ieee80211_local, radar_detected_work); 3348 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 3349 struct ieee80211_chanctx *ctx; 3350 int num_chanctx = 0; 3351 3352 mutex_lock(&local->chanctx_mtx); 3353 list_for_each_entry(ctx, &local->chanctx_list, list) { 3354 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3355 continue; 3356 3357 num_chanctx++; 3358 chandef = ctx->conf.def; 3359 } 3360 mutex_unlock(&local->chanctx_mtx); 3361 3362 rtnl_lock(); 3363 ieee80211_dfs_cac_cancel(local); 3364 rtnl_unlock(); 3365 3366 if (num_chanctx > 1) 3367 /* XXX: multi-channel is not supported yet */ 3368 WARN_ON(1); 3369 else 3370 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3371 } 3372 3373 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3374 { 3375 struct ieee80211_local *local = hw_to_local(hw); 3376 3377 trace_api_radar_detected(local); 3378 3379 schedule_work(&local->radar_detected_work); 3380 } 3381 EXPORT_SYMBOL(ieee80211_radar_detected); 3382 3383 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3384 { 3385 u32 ret; 3386 int tmp; 3387 3388 switch (c->width) { 3389 case NL80211_CHAN_WIDTH_20: 3390 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3391 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3392 break; 3393 case NL80211_CHAN_WIDTH_40: 3394 c->width = NL80211_CHAN_WIDTH_20; 3395 c->center_freq1 = c->chan->center_freq; 3396 ret = IEEE80211_STA_DISABLE_40MHZ | 3397 IEEE80211_STA_DISABLE_VHT; 3398 break; 3399 case NL80211_CHAN_WIDTH_80: 3400 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3401 /* n_P40 */ 3402 tmp /= 2; 3403 /* freq_P40 */ 3404 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3405 c->width = NL80211_CHAN_WIDTH_40; 3406 ret = IEEE80211_STA_DISABLE_VHT; 3407 break; 3408 case NL80211_CHAN_WIDTH_80P80: 3409 c->center_freq2 = 0; 3410 c->width = NL80211_CHAN_WIDTH_80; 3411 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3412 IEEE80211_STA_DISABLE_160MHZ; 3413 break; 3414 case NL80211_CHAN_WIDTH_160: 3415 /* n_P20 */ 3416 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3417 /* n_P80 */ 3418 tmp /= 4; 3419 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3420 c->width = NL80211_CHAN_WIDTH_80; 3421 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3422 IEEE80211_STA_DISABLE_160MHZ; 3423 break; 3424 default: 3425 case NL80211_CHAN_WIDTH_20_NOHT: 3426 WARN_ON_ONCE(1); 3427 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3428 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3429 break; 3430 case NL80211_CHAN_WIDTH_5: 3431 case NL80211_CHAN_WIDTH_10: 3432 WARN_ON_ONCE(1); 3433 /* keep c->width */ 3434 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3435 break; 3436 } 3437 3438 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3439 3440 return ret; 3441 } 3442 3443 /* 3444 * Returns true if smps_mode_new is strictly more restrictive than 3445 * smps_mode_old. 3446 */ 3447 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 3448 enum ieee80211_smps_mode smps_mode_new) 3449 { 3450 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 3451 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 3452 return false; 3453 3454 switch (smps_mode_old) { 3455 case IEEE80211_SMPS_STATIC: 3456 return false; 3457 case IEEE80211_SMPS_DYNAMIC: 3458 return smps_mode_new == IEEE80211_SMPS_STATIC; 3459 case IEEE80211_SMPS_OFF: 3460 return smps_mode_new != IEEE80211_SMPS_OFF; 3461 default: 3462 WARN_ON(1); 3463 } 3464 3465 return false; 3466 } 3467 3468 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3469 struct cfg80211_csa_settings *csa_settings) 3470 { 3471 struct sk_buff *skb; 3472 struct ieee80211_mgmt *mgmt; 3473 struct ieee80211_local *local = sdata->local; 3474 int freq; 3475 int hdr_len = offsetofend(struct ieee80211_mgmt, 3476 u.action.u.chan_switch); 3477 u8 *pos; 3478 3479 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3480 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3481 return -EOPNOTSUPP; 3482 3483 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3484 5 + /* channel switch announcement element */ 3485 3 + /* secondary channel offset element */ 3486 5 + /* wide bandwidth channel switch announcement */ 3487 8); /* mesh channel switch parameters element */ 3488 if (!skb) 3489 return -ENOMEM; 3490 3491 skb_reserve(skb, local->tx_headroom); 3492 mgmt = skb_put_zero(skb, hdr_len); 3493 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3494 IEEE80211_STYPE_ACTION); 3495 3496 eth_broadcast_addr(mgmt->da); 3497 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3498 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3499 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3500 } else { 3501 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3502 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3503 } 3504 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3505 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3506 pos = skb_put(skb, 5); 3507 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3508 *pos++ = 3; /* IE length */ 3509 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3510 freq = csa_settings->chandef.chan->center_freq; 3511 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3512 *pos++ = csa_settings->count; /* count */ 3513 3514 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3515 enum nl80211_channel_type ch_type; 3516 3517 skb_put(skb, 3); 3518 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3519 *pos++ = 1; /* IE length */ 3520 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3521 if (ch_type == NL80211_CHAN_HT40PLUS) 3522 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3523 else 3524 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3525 } 3526 3527 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3528 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3529 3530 skb_put(skb, 8); 3531 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3532 *pos++ = 6; /* IE length */ 3533 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3534 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3535 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3536 *pos++ |= csa_settings->block_tx ? 3537 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3538 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3539 pos += 2; 3540 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3541 pos += 2; 3542 } 3543 3544 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3545 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3546 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3547 skb_put(skb, 5); 3548 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3549 } 3550 3551 ieee80211_tx_skb(sdata, skb); 3552 return 0; 3553 } 3554 3555 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3556 { 3557 return !(cs == NULL || cs->cipher == 0 || 3558 cs->hdr_len < cs->pn_len + cs->pn_off || 3559 cs->hdr_len <= cs->key_idx_off || 3560 cs->key_idx_shift > 7 || 3561 cs->key_idx_mask == 0); 3562 } 3563 3564 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3565 { 3566 int i; 3567 3568 /* Ensure we have enough iftype bitmap space for all iftype values */ 3569 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3570 3571 for (i = 0; i < n; i++) 3572 if (!ieee80211_cs_valid(&cs[i])) 3573 return false; 3574 3575 return true; 3576 } 3577 3578 const struct ieee80211_cipher_scheme * 3579 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3580 enum nl80211_iftype iftype) 3581 { 3582 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3583 int n = local->hw.n_cipher_schemes; 3584 int i; 3585 const struct ieee80211_cipher_scheme *cs = NULL; 3586 3587 for (i = 0; i < n; i++) { 3588 if (l[i].cipher == cipher) { 3589 cs = &l[i]; 3590 break; 3591 } 3592 } 3593 3594 if (!cs || !(cs->iftype & BIT(iftype))) 3595 return NULL; 3596 3597 return cs; 3598 } 3599 3600 int ieee80211_cs_headroom(struct ieee80211_local *local, 3601 struct cfg80211_crypto_settings *crypto, 3602 enum nl80211_iftype iftype) 3603 { 3604 const struct ieee80211_cipher_scheme *cs; 3605 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3606 int i; 3607 3608 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3609 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3610 iftype); 3611 3612 if (cs && headroom < cs->hdr_len) 3613 headroom = cs->hdr_len; 3614 } 3615 3616 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3617 if (cs && headroom < cs->hdr_len) 3618 headroom = cs->hdr_len; 3619 3620 return headroom; 3621 } 3622 3623 static bool 3624 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3625 { 3626 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3627 int skip; 3628 3629 if (end > 0) 3630 return false; 3631 3632 /* One shot NOA */ 3633 if (data->count[i] == 1) 3634 return false; 3635 3636 if (data->desc[i].interval == 0) 3637 return false; 3638 3639 /* End time is in the past, check for repetitions */ 3640 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3641 if (data->count[i] < 255) { 3642 if (data->count[i] <= skip) { 3643 data->count[i] = 0; 3644 return false; 3645 } 3646 3647 data->count[i] -= skip; 3648 } 3649 3650 data->desc[i].start += skip * data->desc[i].interval; 3651 3652 return true; 3653 } 3654 3655 static bool 3656 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3657 s32 *offset) 3658 { 3659 bool ret = false; 3660 int i; 3661 3662 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3663 s32 cur; 3664 3665 if (!data->count[i]) 3666 continue; 3667 3668 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3669 ret = true; 3670 3671 cur = data->desc[i].start - tsf; 3672 if (cur > *offset) 3673 continue; 3674 3675 cur = data->desc[i].start + data->desc[i].duration - tsf; 3676 if (cur > *offset) 3677 *offset = cur; 3678 } 3679 3680 return ret; 3681 } 3682 3683 static u32 3684 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3685 { 3686 s32 offset = 0; 3687 int tries = 0; 3688 /* 3689 * arbitrary limit, used to avoid infinite loops when combined NoA 3690 * descriptors cover the full time period. 3691 */ 3692 int max_tries = 5; 3693 3694 ieee80211_extend_absent_time(data, tsf, &offset); 3695 do { 3696 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3697 break; 3698 3699 tries++; 3700 } while (tries < max_tries); 3701 3702 return offset; 3703 } 3704 3705 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3706 { 3707 u32 next_offset = BIT(31) - 1; 3708 int i; 3709 3710 data->absent = 0; 3711 data->has_next_tsf = false; 3712 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3713 s32 start; 3714 3715 if (!data->count[i]) 3716 continue; 3717 3718 ieee80211_extend_noa_desc(data, tsf, i); 3719 start = data->desc[i].start - tsf; 3720 if (start <= 0) 3721 data->absent |= BIT(i); 3722 3723 if (next_offset > start) 3724 next_offset = start; 3725 3726 data->has_next_tsf = true; 3727 } 3728 3729 if (data->absent) 3730 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3731 3732 data->next_tsf = tsf + next_offset; 3733 } 3734 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3735 3736 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3737 struct ieee80211_noa_data *data, u32 tsf) 3738 { 3739 int ret = 0; 3740 int i; 3741 3742 memset(data, 0, sizeof(*data)); 3743 3744 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3745 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3746 3747 if (!desc->count || !desc->duration) 3748 continue; 3749 3750 data->count[i] = desc->count; 3751 data->desc[i].start = le32_to_cpu(desc->start_time); 3752 data->desc[i].duration = le32_to_cpu(desc->duration); 3753 data->desc[i].interval = le32_to_cpu(desc->interval); 3754 3755 if (data->count[i] > 1 && 3756 data->desc[i].interval < data->desc[i].duration) 3757 continue; 3758 3759 ieee80211_extend_noa_desc(data, tsf, i); 3760 ret++; 3761 } 3762 3763 if (ret) 3764 ieee80211_update_p2p_noa(data, tsf); 3765 3766 return ret; 3767 } 3768 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3769 3770 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3771 struct ieee80211_sub_if_data *sdata) 3772 { 3773 u64 tsf = drv_get_tsf(local, sdata); 3774 u64 dtim_count = 0; 3775 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3776 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3777 struct ps_data *ps; 3778 u8 bcns_from_dtim; 3779 3780 if (tsf == -1ULL || !beacon_int || !dtim_period) 3781 return; 3782 3783 if (sdata->vif.type == NL80211_IFTYPE_AP || 3784 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3785 if (!sdata->bss) 3786 return; 3787 3788 ps = &sdata->bss->ps; 3789 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3790 ps = &sdata->u.mesh.ps; 3791 } else { 3792 return; 3793 } 3794 3795 /* 3796 * actually finds last dtim_count, mac80211 will update in 3797 * __beacon_add_tim(). 3798 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3799 */ 3800 do_div(tsf, beacon_int); 3801 bcns_from_dtim = do_div(tsf, dtim_period); 3802 /* just had a DTIM */ 3803 if (!bcns_from_dtim) 3804 dtim_count = 0; 3805 else 3806 dtim_count = dtim_period - bcns_from_dtim; 3807 3808 ps->dtim_count = dtim_count; 3809 } 3810 3811 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3812 struct ieee80211_chanctx *ctx) 3813 { 3814 struct ieee80211_sub_if_data *sdata; 3815 u8 radar_detect = 0; 3816 3817 lockdep_assert_held(&local->chanctx_mtx); 3818 3819 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3820 return 0; 3821 3822 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3823 if (sdata->reserved_radar_required) 3824 radar_detect |= BIT(sdata->reserved_chandef.width); 3825 3826 /* 3827 * An in-place reservation context should not have any assigned vifs 3828 * until it replaces the other context. 3829 */ 3830 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3831 !list_empty(&ctx->assigned_vifs)); 3832 3833 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3834 if (sdata->radar_required) 3835 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3836 3837 return radar_detect; 3838 } 3839 3840 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3841 const struct cfg80211_chan_def *chandef, 3842 enum ieee80211_chanctx_mode chanmode, 3843 u8 radar_detect) 3844 { 3845 struct ieee80211_local *local = sdata->local; 3846 struct ieee80211_sub_if_data *sdata_iter; 3847 enum nl80211_iftype iftype = sdata->wdev.iftype; 3848 struct ieee80211_chanctx *ctx; 3849 int total = 1; 3850 struct iface_combination_params params = { 3851 .radar_detect = radar_detect, 3852 }; 3853 3854 lockdep_assert_held(&local->chanctx_mtx); 3855 3856 if (WARN_ON(hweight32(radar_detect) > 1)) 3857 return -EINVAL; 3858 3859 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3860 !chandef->chan)) 3861 return -EINVAL; 3862 3863 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3864 return -EINVAL; 3865 3866 if (sdata->vif.type == NL80211_IFTYPE_AP || 3867 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3868 /* 3869 * always passing this is harmless, since it'll be the 3870 * same value that cfg80211 finds if it finds the same 3871 * interface ... and that's always allowed 3872 */ 3873 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3874 } 3875 3876 /* Always allow software iftypes */ 3877 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 3878 if (radar_detect) 3879 return -EINVAL; 3880 return 0; 3881 } 3882 3883 if (chandef) 3884 params.num_different_channels = 1; 3885 3886 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3887 params.iftype_num[iftype] = 1; 3888 3889 list_for_each_entry(ctx, &local->chanctx_list, list) { 3890 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3891 continue; 3892 params.radar_detect |= 3893 ieee80211_chanctx_radar_detect(local, ctx); 3894 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3895 params.num_different_channels++; 3896 continue; 3897 } 3898 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3899 cfg80211_chandef_compatible(chandef, 3900 &ctx->conf.def)) 3901 continue; 3902 params.num_different_channels++; 3903 } 3904 3905 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3906 struct wireless_dev *wdev_iter; 3907 3908 wdev_iter = &sdata_iter->wdev; 3909 3910 if (sdata_iter == sdata || 3911 !ieee80211_sdata_running(sdata_iter) || 3912 cfg80211_iftype_allowed(local->hw.wiphy, 3913 wdev_iter->iftype, 0, 1)) 3914 continue; 3915 3916 params.iftype_num[wdev_iter->iftype]++; 3917 total++; 3918 } 3919 3920 if (total == 1 && !params.radar_detect) 3921 return 0; 3922 3923 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3924 } 3925 3926 static void 3927 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3928 void *data) 3929 { 3930 u32 *max_num_different_channels = data; 3931 3932 *max_num_different_channels = max(*max_num_different_channels, 3933 c->num_different_channels); 3934 } 3935 3936 int ieee80211_max_num_channels(struct ieee80211_local *local) 3937 { 3938 struct ieee80211_sub_if_data *sdata; 3939 struct ieee80211_chanctx *ctx; 3940 u32 max_num_different_channels = 1; 3941 int err; 3942 struct iface_combination_params params = {0}; 3943 3944 lockdep_assert_held(&local->chanctx_mtx); 3945 3946 list_for_each_entry(ctx, &local->chanctx_list, list) { 3947 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3948 continue; 3949 3950 params.num_different_channels++; 3951 3952 params.radar_detect |= 3953 ieee80211_chanctx_radar_detect(local, ctx); 3954 } 3955 3956 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3957 params.iftype_num[sdata->wdev.iftype]++; 3958 3959 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3960 ieee80211_iter_max_chans, 3961 &max_num_different_channels); 3962 if (err < 0) 3963 return err; 3964 3965 return max_num_different_channels; 3966 } 3967 3968 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3969 { 3970 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3971 *buf++ = 7; /* len */ 3972 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3973 *buf++ = 0x50; 3974 *buf++ = 0xf2; 3975 *buf++ = 2; /* WME */ 3976 *buf++ = 0; /* WME info */ 3977 *buf++ = 1; /* WME ver */ 3978 *buf++ = qosinfo; /* U-APSD no in use */ 3979 3980 return buf; 3981 } 3982 3983 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3984 unsigned long *frame_cnt, 3985 unsigned long *byte_cnt) 3986 { 3987 struct txq_info *txqi = to_txq_info(txq); 3988 u32 frag_cnt = 0, frag_bytes = 0; 3989 struct sk_buff *skb; 3990 3991 skb_queue_walk(&txqi->frags, skb) { 3992 frag_cnt++; 3993 frag_bytes += skb->len; 3994 } 3995 3996 if (frame_cnt) 3997 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 3998 3999 if (byte_cnt) 4000 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4001 } 4002 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4003 4004 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4005 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4006 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4007 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4008 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4009 }; 4010