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) 2018-2020 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 43 local = wiphy_priv(wiphy); 44 return &local->hw; 45 } 46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 47 48 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 49 { 50 struct sk_buff *skb; 51 struct ieee80211_hdr *hdr; 52 53 skb_queue_walk(&tx->skbs, skb) { 54 hdr = (struct ieee80211_hdr *) skb->data; 55 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 56 } 57 } 58 59 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 60 int rate, int erp, int short_preamble, 61 int shift) 62 { 63 int dur; 64 65 /* calculate duration (in microseconds, rounded up to next higher 66 * integer if it includes a fractional microsecond) to send frame of 67 * len bytes (does not include FCS) at the given rate. Duration will 68 * also include SIFS. 69 * 70 * rate is in 100 kbps, so divident is multiplied by 10 in the 71 * DIV_ROUND_UP() operations. 72 * 73 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 74 * is assumed to be 0 otherwise. 75 */ 76 77 if (band == NL80211_BAND_5GHZ || erp) { 78 /* 79 * OFDM: 80 * 81 * N_DBPS = DATARATE x 4 82 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 83 * (16 = SIGNAL time, 6 = tail bits) 84 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 85 * 86 * T_SYM = 4 usec 87 * 802.11a - 18.5.2: aSIFSTime = 16 usec 88 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 89 * signal ext = 6 usec 90 */ 91 dur = 16; /* SIFS + signal ext */ 92 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 93 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 94 95 /* IEEE 802.11-2012 18.3.2.4: all values above are: 96 * * times 4 for 5 MHz 97 * * times 2 for 10 MHz 98 */ 99 dur *= 1 << shift; 100 101 /* rates should already consider the channel bandwidth, 102 * don't apply divisor again. 103 */ 104 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 105 4 * rate); /* T_SYM x N_SYM */ 106 } else { 107 /* 108 * 802.11b or 802.11g with 802.11b compatibility: 109 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 110 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 111 * 112 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 113 * aSIFSTime = 10 usec 114 * aPreambleLength = 144 usec or 72 usec with short preamble 115 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 116 */ 117 dur = 10; /* aSIFSTime = 10 usec */ 118 dur += short_preamble ? (72 + 24) : (144 + 48); 119 120 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 121 } 122 123 return dur; 124 } 125 126 /* Exported duration function for driver use */ 127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 128 struct ieee80211_vif *vif, 129 enum nl80211_band band, 130 size_t frame_len, 131 struct ieee80211_rate *rate) 132 { 133 struct ieee80211_sub_if_data *sdata; 134 u16 dur; 135 int erp, shift = 0; 136 bool short_preamble = false; 137 138 erp = 0; 139 if (vif) { 140 sdata = vif_to_sdata(vif); 141 short_preamble = sdata->vif.bss_conf.use_short_preamble; 142 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 143 erp = rate->flags & IEEE80211_RATE_ERP_G; 144 shift = ieee80211_vif_get_shift(vif); 145 } 146 147 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 148 short_preamble, shift); 149 150 return cpu_to_le16(dur); 151 } 152 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 153 154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 155 struct ieee80211_vif *vif, size_t frame_len, 156 const struct ieee80211_tx_info *frame_txctl) 157 { 158 struct ieee80211_local *local = hw_to_local(hw); 159 struct ieee80211_rate *rate; 160 struct ieee80211_sub_if_data *sdata; 161 bool short_preamble; 162 int erp, shift = 0, bitrate; 163 u16 dur; 164 struct ieee80211_supported_band *sband; 165 166 sband = local->hw.wiphy->bands[frame_txctl->band]; 167 168 short_preamble = false; 169 170 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 171 172 erp = 0; 173 if (vif) { 174 sdata = vif_to_sdata(vif); 175 short_preamble = sdata->vif.bss_conf.use_short_preamble; 176 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 177 erp = rate->flags & IEEE80211_RATE_ERP_G; 178 shift = ieee80211_vif_get_shift(vif); 179 } 180 181 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 182 183 /* CTS duration */ 184 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 185 erp, short_preamble, shift); 186 /* Data frame duration */ 187 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 188 erp, short_preamble, shift); 189 /* ACK duration */ 190 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 191 erp, short_preamble, shift); 192 193 return cpu_to_le16(dur); 194 } 195 EXPORT_SYMBOL(ieee80211_rts_duration); 196 197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 198 struct ieee80211_vif *vif, 199 size_t frame_len, 200 const struct ieee80211_tx_info *frame_txctl) 201 { 202 struct ieee80211_local *local = hw_to_local(hw); 203 struct ieee80211_rate *rate; 204 struct ieee80211_sub_if_data *sdata; 205 bool short_preamble; 206 int erp, shift = 0, bitrate; 207 u16 dur; 208 struct ieee80211_supported_band *sband; 209 210 sband = local->hw.wiphy->bands[frame_txctl->band]; 211 212 short_preamble = false; 213 214 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 215 erp = 0; 216 if (vif) { 217 sdata = vif_to_sdata(vif); 218 short_preamble = sdata->vif.bss_conf.use_short_preamble; 219 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 220 erp = rate->flags & IEEE80211_RATE_ERP_G; 221 shift = ieee80211_vif_get_shift(vif); 222 } 223 224 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 225 226 /* Data frame duration */ 227 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 228 erp, short_preamble, shift); 229 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 230 /* ACK duration */ 231 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 232 erp, short_preamble, shift); 233 } 234 235 return cpu_to_le16(dur); 236 } 237 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 238 239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 240 { 241 struct ieee80211_local *local = sdata->local; 242 struct ieee80211_vif *vif = &sdata->vif; 243 struct fq *fq = &local->fq; 244 struct ps_data *ps = NULL; 245 struct txq_info *txqi; 246 struct sta_info *sta; 247 int i; 248 249 local_bh_disable(); 250 spin_lock(&fq->lock); 251 252 if (sdata->vif.type == NL80211_IFTYPE_AP) 253 ps = &sdata->bss->ps; 254 255 sdata->vif.txqs_stopped[ac] = false; 256 257 list_for_each_entry_rcu(sta, &local->sta_list, list) { 258 if (sdata != sta->sdata) 259 continue; 260 261 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 262 struct ieee80211_txq *txq = sta->sta.txq[i]; 263 264 if (!txq) 265 continue; 266 267 txqi = to_txq_info(txq); 268 269 if (ac != txq->ac) 270 continue; 271 272 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, 273 &txqi->flags)) 274 continue; 275 276 spin_unlock(&fq->lock); 277 drv_wake_tx_queue(local, txqi); 278 spin_lock(&fq->lock); 279 } 280 } 281 282 if (!vif->txq) 283 goto out; 284 285 txqi = to_txq_info(vif->txq); 286 287 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) || 288 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac) 289 goto out; 290 291 spin_unlock(&fq->lock); 292 293 drv_wake_tx_queue(local, txqi); 294 local_bh_enable(); 295 return; 296 out: 297 spin_unlock(&fq->lock); 298 local_bh_enable(); 299 } 300 301 static void 302 __releases(&local->queue_stop_reason_lock) 303 __acquires(&local->queue_stop_reason_lock) 304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 305 { 306 struct ieee80211_sub_if_data *sdata; 307 int n_acs = IEEE80211_NUM_ACS; 308 int i; 309 310 rcu_read_lock(); 311 312 if (local->hw.queues < IEEE80211_NUM_ACS) 313 n_acs = 1; 314 315 for (i = 0; i < local->hw.queues; i++) { 316 if (local->queue_stop_reasons[i]) 317 continue; 318 319 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 320 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 321 int ac; 322 323 for (ac = 0; ac < n_acs; ac++) { 324 int ac_queue = sdata->vif.hw_queue[ac]; 325 326 if (ac_queue == i || 327 sdata->vif.cab_queue == i) 328 __ieee80211_wake_txqs(sdata, ac); 329 } 330 } 331 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 332 } 333 334 rcu_read_unlock(); 335 } 336 337 void ieee80211_wake_txqs(unsigned long data) 338 { 339 struct ieee80211_local *local = (struct ieee80211_local *)data; 340 unsigned long flags; 341 342 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 343 _ieee80211_wake_txqs(local, &flags); 344 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 345 } 346 347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 348 { 349 struct ieee80211_sub_if_data *sdata; 350 int n_acs = IEEE80211_NUM_ACS; 351 352 if (local->ops->wake_tx_queue) 353 return; 354 355 if (local->hw.queues < IEEE80211_NUM_ACS) 356 n_acs = 1; 357 358 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 359 int ac; 360 361 if (!sdata->dev) 362 continue; 363 364 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 365 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 366 continue; 367 368 for (ac = 0; ac < n_acs; ac++) { 369 int ac_queue = sdata->vif.hw_queue[ac]; 370 371 if (ac_queue == queue || 372 (sdata->vif.cab_queue == queue && 373 local->queue_stop_reasons[ac_queue] == 0 && 374 skb_queue_empty(&local->pending[ac_queue]))) 375 netif_wake_subqueue(sdata->dev, ac); 376 } 377 } 378 } 379 380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 381 enum queue_stop_reason reason, 382 bool refcounted, 383 unsigned long *flags) 384 { 385 struct ieee80211_local *local = hw_to_local(hw); 386 387 trace_wake_queue(local, queue, reason); 388 389 if (WARN_ON(queue >= hw->queues)) 390 return; 391 392 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 393 return; 394 395 if (!refcounted) { 396 local->q_stop_reasons[queue][reason] = 0; 397 } else { 398 local->q_stop_reasons[queue][reason]--; 399 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 400 local->q_stop_reasons[queue][reason] = 0; 401 } 402 403 if (local->q_stop_reasons[queue][reason] == 0) 404 __clear_bit(reason, &local->queue_stop_reasons[queue]); 405 406 if (local->queue_stop_reasons[queue] != 0) 407 /* someone still has this queue stopped */ 408 return; 409 410 if (skb_queue_empty(&local->pending[queue])) { 411 rcu_read_lock(); 412 ieee80211_propagate_queue_wake(local, queue); 413 rcu_read_unlock(); 414 } else 415 tasklet_schedule(&local->tx_pending_tasklet); 416 417 /* 418 * Calling _ieee80211_wake_txqs here can be a problem because it may 419 * release queue_stop_reason_lock which has been taken by 420 * __ieee80211_wake_queue's caller. It is certainly not very nice to 421 * release someone's lock, but it is fine because all the callers of 422 * __ieee80211_wake_queue call it right before releasing the lock. 423 */ 424 if (local->ops->wake_tx_queue) { 425 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 426 tasklet_schedule(&local->wake_txqs_tasklet); 427 else 428 _ieee80211_wake_txqs(local, flags); 429 } 430 } 431 432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 433 enum queue_stop_reason reason, 434 bool refcounted) 435 { 436 struct ieee80211_local *local = hw_to_local(hw); 437 unsigned long flags; 438 439 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 440 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 441 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 442 } 443 444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 445 { 446 ieee80211_wake_queue_by_reason(hw, queue, 447 IEEE80211_QUEUE_STOP_REASON_DRIVER, 448 false); 449 } 450 EXPORT_SYMBOL(ieee80211_wake_queue); 451 452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 453 enum queue_stop_reason reason, 454 bool refcounted) 455 { 456 struct ieee80211_local *local = hw_to_local(hw); 457 struct ieee80211_sub_if_data *sdata; 458 int n_acs = IEEE80211_NUM_ACS; 459 460 trace_stop_queue(local, queue, reason); 461 462 if (WARN_ON(queue >= hw->queues)) 463 return; 464 465 if (!refcounted) 466 local->q_stop_reasons[queue][reason] = 1; 467 else 468 local->q_stop_reasons[queue][reason]++; 469 470 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 471 return; 472 473 if (local->hw.queues < IEEE80211_NUM_ACS) 474 n_acs = 1; 475 476 rcu_read_lock(); 477 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 478 int ac; 479 480 if (!sdata->dev) 481 continue; 482 483 for (ac = 0; ac < n_acs; ac++) { 484 if (sdata->vif.hw_queue[ac] == queue || 485 sdata->vif.cab_queue == queue) { 486 if (!local->ops->wake_tx_queue) { 487 netif_stop_subqueue(sdata->dev, ac); 488 continue; 489 } 490 spin_lock(&local->fq.lock); 491 sdata->vif.txqs_stopped[ac] = true; 492 spin_unlock(&local->fq.lock); 493 } 494 } 495 } 496 rcu_read_unlock(); 497 } 498 499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 500 enum queue_stop_reason reason, 501 bool refcounted) 502 { 503 struct ieee80211_local *local = hw_to_local(hw); 504 unsigned long flags; 505 506 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 507 __ieee80211_stop_queue(hw, queue, reason, refcounted); 508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 509 } 510 511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 512 { 513 ieee80211_stop_queue_by_reason(hw, queue, 514 IEEE80211_QUEUE_STOP_REASON_DRIVER, 515 false); 516 } 517 EXPORT_SYMBOL(ieee80211_stop_queue); 518 519 void ieee80211_add_pending_skb(struct ieee80211_local *local, 520 struct sk_buff *skb) 521 { 522 struct ieee80211_hw *hw = &local->hw; 523 unsigned long flags; 524 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 525 int queue = info->hw_queue; 526 527 if (WARN_ON(!info->control.vif)) { 528 ieee80211_free_txskb(&local->hw, skb); 529 return; 530 } 531 532 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 533 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 534 false); 535 __skb_queue_tail(&local->pending[queue], skb); 536 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 537 false, &flags); 538 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 539 } 540 541 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 542 struct sk_buff_head *skbs) 543 { 544 struct ieee80211_hw *hw = &local->hw; 545 struct sk_buff *skb; 546 unsigned long flags; 547 int queue, i; 548 549 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 550 while ((skb = skb_dequeue(skbs))) { 551 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 552 553 if (WARN_ON(!info->control.vif)) { 554 ieee80211_free_txskb(&local->hw, skb); 555 continue; 556 } 557 558 queue = info->hw_queue; 559 560 __ieee80211_stop_queue(hw, queue, 561 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 562 false); 563 564 __skb_queue_tail(&local->pending[queue], skb); 565 } 566 567 for (i = 0; i < hw->queues; i++) 568 __ieee80211_wake_queue(hw, i, 569 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 570 false, &flags); 571 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 572 } 573 574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 575 unsigned long queues, 576 enum queue_stop_reason reason, 577 bool refcounted) 578 { 579 struct ieee80211_local *local = hw_to_local(hw); 580 unsigned long flags; 581 int i; 582 583 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 584 585 for_each_set_bit(i, &queues, hw->queues) 586 __ieee80211_stop_queue(hw, i, reason, refcounted); 587 588 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 589 } 590 591 void ieee80211_stop_queues(struct ieee80211_hw *hw) 592 { 593 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 594 IEEE80211_QUEUE_STOP_REASON_DRIVER, 595 false); 596 } 597 EXPORT_SYMBOL(ieee80211_stop_queues); 598 599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 600 { 601 struct ieee80211_local *local = hw_to_local(hw); 602 unsigned long flags; 603 int ret; 604 605 if (WARN_ON(queue >= hw->queues)) 606 return true; 607 608 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 609 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 610 &local->queue_stop_reasons[queue]); 611 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 612 return ret; 613 } 614 EXPORT_SYMBOL(ieee80211_queue_stopped); 615 616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 617 unsigned long queues, 618 enum queue_stop_reason reason, 619 bool refcounted) 620 { 621 struct ieee80211_local *local = hw_to_local(hw); 622 unsigned long flags; 623 int i; 624 625 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 626 627 for_each_set_bit(i, &queues, hw->queues) 628 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 629 630 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 631 } 632 633 void ieee80211_wake_queues(struct ieee80211_hw *hw) 634 { 635 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 636 IEEE80211_QUEUE_STOP_REASON_DRIVER, 637 false); 638 } 639 EXPORT_SYMBOL(ieee80211_wake_queues); 640 641 static unsigned int 642 ieee80211_get_vif_queues(struct ieee80211_local *local, 643 struct ieee80211_sub_if_data *sdata) 644 { 645 unsigned int queues; 646 647 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 648 int ac; 649 650 queues = 0; 651 652 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 653 queues |= BIT(sdata->vif.hw_queue[ac]); 654 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 655 queues |= BIT(sdata->vif.cab_queue); 656 } else { 657 /* all queues */ 658 queues = BIT(local->hw.queues) - 1; 659 } 660 661 return queues; 662 } 663 664 void __ieee80211_flush_queues(struct ieee80211_local *local, 665 struct ieee80211_sub_if_data *sdata, 666 unsigned int queues, bool drop) 667 { 668 if (!local->ops->flush) 669 return; 670 671 /* 672 * If no queue was set, or if the HW doesn't support 673 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 674 */ 675 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 676 queues = ieee80211_get_vif_queues(local, sdata); 677 678 ieee80211_stop_queues_by_reason(&local->hw, queues, 679 IEEE80211_QUEUE_STOP_REASON_FLUSH, 680 false); 681 682 drv_flush(local, sdata, queues, drop); 683 684 ieee80211_wake_queues_by_reason(&local->hw, queues, 685 IEEE80211_QUEUE_STOP_REASON_FLUSH, 686 false); 687 } 688 689 void ieee80211_flush_queues(struct ieee80211_local *local, 690 struct ieee80211_sub_if_data *sdata, bool drop) 691 { 692 __ieee80211_flush_queues(local, sdata, 0, drop); 693 } 694 695 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 696 struct ieee80211_sub_if_data *sdata, 697 enum queue_stop_reason reason) 698 { 699 ieee80211_stop_queues_by_reason(&local->hw, 700 ieee80211_get_vif_queues(local, sdata), 701 reason, true); 702 } 703 704 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 705 struct ieee80211_sub_if_data *sdata, 706 enum queue_stop_reason reason) 707 { 708 ieee80211_wake_queues_by_reason(&local->hw, 709 ieee80211_get_vif_queues(local, sdata), 710 reason, true); 711 } 712 713 static void __iterate_interfaces(struct ieee80211_local *local, 714 u32 iter_flags, 715 void (*iterator)(void *data, u8 *mac, 716 struct ieee80211_vif *vif), 717 void *data) 718 { 719 struct ieee80211_sub_if_data *sdata; 720 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 721 722 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 723 switch (sdata->vif.type) { 724 case NL80211_IFTYPE_MONITOR: 725 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 726 continue; 727 break; 728 case NL80211_IFTYPE_AP_VLAN: 729 continue; 730 default: 731 break; 732 } 733 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 734 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 735 continue; 736 if (ieee80211_sdata_running(sdata) || !active_only) 737 iterator(data, sdata->vif.addr, 738 &sdata->vif); 739 } 740 741 sdata = rcu_dereference_check(local->monitor_sdata, 742 lockdep_is_held(&local->iflist_mtx) || 743 lockdep_rtnl_is_held()); 744 if (sdata && 745 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 746 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 747 iterator(data, sdata->vif.addr, &sdata->vif); 748 } 749 750 void ieee80211_iterate_interfaces( 751 struct ieee80211_hw *hw, u32 iter_flags, 752 void (*iterator)(void *data, u8 *mac, 753 struct ieee80211_vif *vif), 754 void *data) 755 { 756 struct ieee80211_local *local = hw_to_local(hw); 757 758 mutex_lock(&local->iflist_mtx); 759 __iterate_interfaces(local, iter_flags, iterator, data); 760 mutex_unlock(&local->iflist_mtx); 761 } 762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 763 764 void ieee80211_iterate_active_interfaces_atomic( 765 struct ieee80211_hw *hw, u32 iter_flags, 766 void (*iterator)(void *data, u8 *mac, 767 struct ieee80211_vif *vif), 768 void *data) 769 { 770 struct ieee80211_local *local = hw_to_local(hw); 771 772 rcu_read_lock(); 773 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 774 iterator, data); 775 rcu_read_unlock(); 776 } 777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 778 779 void ieee80211_iterate_active_interfaces_rtnl( 780 struct ieee80211_hw *hw, u32 iter_flags, 781 void (*iterator)(void *data, u8 *mac, 782 struct ieee80211_vif *vif), 783 void *data) 784 { 785 struct ieee80211_local *local = hw_to_local(hw); 786 787 ASSERT_RTNL(); 788 789 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 790 iterator, data); 791 } 792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 793 794 static void __iterate_stations(struct ieee80211_local *local, 795 void (*iterator)(void *data, 796 struct ieee80211_sta *sta), 797 void *data) 798 { 799 struct sta_info *sta; 800 801 list_for_each_entry_rcu(sta, &local->sta_list, list) { 802 if (!sta->uploaded) 803 continue; 804 805 iterator(data, &sta->sta); 806 } 807 } 808 809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 810 void (*iterator)(void *data, 811 struct ieee80211_sta *sta), 812 void *data) 813 { 814 struct ieee80211_local *local = hw_to_local(hw); 815 816 rcu_read_lock(); 817 __iterate_stations(local, iterator, data); 818 rcu_read_unlock(); 819 } 820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 821 822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 823 { 824 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 825 826 if (!ieee80211_sdata_running(sdata) || 827 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 828 return NULL; 829 return &sdata->vif; 830 } 831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 832 833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 834 { 835 struct ieee80211_sub_if_data *sdata; 836 837 if (!vif) 838 return NULL; 839 840 sdata = vif_to_sdata(vif); 841 842 if (!ieee80211_sdata_running(sdata) || 843 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 844 return NULL; 845 846 return &sdata->wdev; 847 } 848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 849 850 /* 851 * Nothing should have been stuffed into the workqueue during 852 * the suspend->resume cycle. Since we can't check each caller 853 * of this function if we are already quiescing / suspended, 854 * check here and don't WARN since this can actually happen when 855 * the rx path (for example) is racing against __ieee80211_suspend 856 * and suspending / quiescing was set after the rx path checked 857 * them. 858 */ 859 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 860 { 861 if (local->quiescing || (local->suspended && !local->resuming)) { 862 pr_warn("queueing ieee80211 work while going to suspend\n"); 863 return false; 864 } 865 866 return true; 867 } 868 869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 870 { 871 struct ieee80211_local *local = hw_to_local(hw); 872 873 if (!ieee80211_can_queue_work(local)) 874 return; 875 876 queue_work(local->workqueue, work); 877 } 878 EXPORT_SYMBOL(ieee80211_queue_work); 879 880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 881 struct delayed_work *dwork, 882 unsigned long delay) 883 { 884 struct ieee80211_local *local = hw_to_local(hw); 885 886 if (!ieee80211_can_queue_work(local)) 887 return; 888 889 queue_delayed_work(local->workqueue, dwork, delay); 890 } 891 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 892 893 static void ieee80211_parse_extension_element(u32 *crc, 894 const struct element *elem, 895 struct ieee802_11_elems *elems) 896 { 897 const void *data = elem->data + 1; 898 u8 len = elem->datalen - 1; 899 900 switch (elem->data[0]) { 901 case WLAN_EID_EXT_HE_MU_EDCA: 902 if (len == sizeof(*elems->mu_edca_param_set)) { 903 elems->mu_edca_param_set = data; 904 if (crc) 905 *crc = crc32_be(*crc, (void *)elem, 906 elem->datalen + 2); 907 } 908 break; 909 case WLAN_EID_EXT_HE_CAPABILITY: 910 elems->he_cap = data; 911 elems->he_cap_len = len; 912 break; 913 case WLAN_EID_EXT_HE_OPERATION: 914 if (len >= sizeof(*elems->he_operation) && 915 len == ieee80211_he_oper_size(data) - 1) { 916 if (crc) 917 *crc = crc32_be(*crc, (void *)elem, 918 elem->datalen + 2); 919 elems->he_operation = data; 920 } 921 break; 922 case WLAN_EID_EXT_UORA: 923 if (len == 1) 924 elems->uora_element = data; 925 break; 926 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME: 927 if (len == 3) 928 elems->max_channel_switch_time = data; 929 break; 930 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION: 931 if (len == sizeof(*elems->mbssid_config_ie)) 932 elems->mbssid_config_ie = data; 933 break; 934 case WLAN_EID_EXT_HE_SPR: 935 if (len >= sizeof(*elems->he_spr) && 936 len >= ieee80211_he_spr_size(data)) 937 elems->he_spr = data; 938 break; 939 } 940 } 941 942 static u32 943 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 944 struct ieee802_11_elems *elems, 945 u64 filter, u32 crc, 946 const struct element *check_inherit) 947 { 948 const struct element *elem; 949 bool calc_crc = filter != 0; 950 DECLARE_BITMAP(seen_elems, 256); 951 const u8 *ie; 952 953 bitmap_zero(seen_elems, 256); 954 955 for_each_element(elem, start, len) { 956 bool elem_parse_failed; 957 u8 id = elem->id; 958 u8 elen = elem->datalen; 959 const u8 *pos = elem->data; 960 961 if (check_inherit && 962 !cfg80211_is_element_inherited(elem, 963 check_inherit)) 964 continue; 965 966 switch (id) { 967 case WLAN_EID_SSID: 968 case WLAN_EID_SUPP_RATES: 969 case WLAN_EID_FH_PARAMS: 970 case WLAN_EID_DS_PARAMS: 971 case WLAN_EID_CF_PARAMS: 972 case WLAN_EID_TIM: 973 case WLAN_EID_IBSS_PARAMS: 974 case WLAN_EID_CHALLENGE: 975 case WLAN_EID_RSN: 976 case WLAN_EID_ERP_INFO: 977 case WLAN_EID_EXT_SUPP_RATES: 978 case WLAN_EID_HT_CAPABILITY: 979 case WLAN_EID_HT_OPERATION: 980 case WLAN_EID_VHT_CAPABILITY: 981 case WLAN_EID_VHT_OPERATION: 982 case WLAN_EID_MESH_ID: 983 case WLAN_EID_MESH_CONFIG: 984 case WLAN_EID_PEER_MGMT: 985 case WLAN_EID_PREQ: 986 case WLAN_EID_PREP: 987 case WLAN_EID_PERR: 988 case WLAN_EID_RANN: 989 case WLAN_EID_CHANNEL_SWITCH: 990 case WLAN_EID_EXT_CHANSWITCH_ANN: 991 case WLAN_EID_COUNTRY: 992 case WLAN_EID_PWR_CONSTRAINT: 993 case WLAN_EID_TIMEOUT_INTERVAL: 994 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 995 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 996 case WLAN_EID_CHAN_SWITCH_PARAM: 997 case WLAN_EID_EXT_CAPABILITY: 998 case WLAN_EID_CHAN_SWITCH_TIMING: 999 case WLAN_EID_LINK_ID: 1000 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1001 case WLAN_EID_RSNX: 1002 /* 1003 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 1004 * that if the content gets bigger it might be needed more than once 1005 */ 1006 if (test_bit(id, seen_elems)) { 1007 elems->parse_error = true; 1008 continue; 1009 } 1010 break; 1011 } 1012 1013 if (calc_crc && id < 64 && (filter & (1ULL << id))) 1014 crc = crc32_be(crc, pos - 2, elen + 2); 1015 1016 elem_parse_failed = false; 1017 1018 switch (id) { 1019 case WLAN_EID_LINK_ID: 1020 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 1021 elem_parse_failed = true; 1022 break; 1023 } 1024 elems->lnk_id = (void *)(pos - 2); 1025 break; 1026 case WLAN_EID_CHAN_SWITCH_TIMING: 1027 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 1028 elem_parse_failed = true; 1029 break; 1030 } 1031 elems->ch_sw_timing = (void *)pos; 1032 break; 1033 case WLAN_EID_EXT_CAPABILITY: 1034 elems->ext_capab = pos; 1035 elems->ext_capab_len = elen; 1036 break; 1037 case WLAN_EID_SSID: 1038 elems->ssid = pos; 1039 elems->ssid_len = elen; 1040 break; 1041 case WLAN_EID_SUPP_RATES: 1042 elems->supp_rates = pos; 1043 elems->supp_rates_len = elen; 1044 break; 1045 case WLAN_EID_DS_PARAMS: 1046 if (elen >= 1) 1047 elems->ds_params = pos; 1048 else 1049 elem_parse_failed = true; 1050 break; 1051 case WLAN_EID_TIM: 1052 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1053 elems->tim = (void *)pos; 1054 elems->tim_len = elen; 1055 } else 1056 elem_parse_failed = true; 1057 break; 1058 case WLAN_EID_CHALLENGE: 1059 elems->challenge = pos; 1060 elems->challenge_len = elen; 1061 break; 1062 case WLAN_EID_VENDOR_SPECIFIC: 1063 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1064 pos[2] == 0xf2) { 1065 /* Microsoft OUI (00:50:F2) */ 1066 1067 if (calc_crc) 1068 crc = crc32_be(crc, pos - 2, elen + 2); 1069 1070 if (elen >= 5 && pos[3] == 2) { 1071 /* OUI Type 2 - WMM IE */ 1072 if (pos[4] == 0) { 1073 elems->wmm_info = pos; 1074 elems->wmm_info_len = elen; 1075 } else if (pos[4] == 1) { 1076 elems->wmm_param = pos; 1077 elems->wmm_param_len = elen; 1078 } 1079 } 1080 } 1081 break; 1082 case WLAN_EID_RSN: 1083 elems->rsn = pos; 1084 elems->rsn_len = elen; 1085 break; 1086 case WLAN_EID_ERP_INFO: 1087 if (elen >= 1) 1088 elems->erp_info = pos; 1089 else 1090 elem_parse_failed = true; 1091 break; 1092 case WLAN_EID_EXT_SUPP_RATES: 1093 elems->ext_supp_rates = pos; 1094 elems->ext_supp_rates_len = elen; 1095 break; 1096 case WLAN_EID_HT_CAPABILITY: 1097 if (elen >= sizeof(struct ieee80211_ht_cap)) 1098 elems->ht_cap_elem = (void *)pos; 1099 else 1100 elem_parse_failed = true; 1101 break; 1102 case WLAN_EID_HT_OPERATION: 1103 if (elen >= sizeof(struct ieee80211_ht_operation)) 1104 elems->ht_operation = (void *)pos; 1105 else 1106 elem_parse_failed = true; 1107 break; 1108 case WLAN_EID_VHT_CAPABILITY: 1109 if (elen >= sizeof(struct ieee80211_vht_cap)) 1110 elems->vht_cap_elem = (void *)pos; 1111 else 1112 elem_parse_failed = true; 1113 break; 1114 case WLAN_EID_VHT_OPERATION: 1115 if (elen >= sizeof(struct ieee80211_vht_operation)) { 1116 elems->vht_operation = (void *)pos; 1117 if (calc_crc) 1118 crc = crc32_be(crc, pos - 2, elen + 2); 1119 break; 1120 } 1121 elem_parse_failed = true; 1122 break; 1123 case WLAN_EID_OPMODE_NOTIF: 1124 if (elen > 0) { 1125 elems->opmode_notif = pos; 1126 if (calc_crc) 1127 crc = crc32_be(crc, pos - 2, elen + 2); 1128 break; 1129 } 1130 elem_parse_failed = true; 1131 break; 1132 case WLAN_EID_MESH_ID: 1133 elems->mesh_id = pos; 1134 elems->mesh_id_len = elen; 1135 break; 1136 case WLAN_EID_MESH_CONFIG: 1137 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1138 elems->mesh_config = (void *)pos; 1139 else 1140 elem_parse_failed = true; 1141 break; 1142 case WLAN_EID_PEER_MGMT: 1143 elems->peering = pos; 1144 elems->peering_len = elen; 1145 break; 1146 case WLAN_EID_MESH_AWAKE_WINDOW: 1147 if (elen >= 2) 1148 elems->awake_window = (void *)pos; 1149 break; 1150 case WLAN_EID_PREQ: 1151 elems->preq = pos; 1152 elems->preq_len = elen; 1153 break; 1154 case WLAN_EID_PREP: 1155 elems->prep = pos; 1156 elems->prep_len = elen; 1157 break; 1158 case WLAN_EID_PERR: 1159 elems->perr = pos; 1160 elems->perr_len = elen; 1161 break; 1162 case WLAN_EID_RANN: 1163 if (elen >= sizeof(struct ieee80211_rann_ie)) 1164 elems->rann = (void *)pos; 1165 else 1166 elem_parse_failed = true; 1167 break; 1168 case WLAN_EID_CHANNEL_SWITCH: 1169 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1170 elem_parse_failed = true; 1171 break; 1172 } 1173 elems->ch_switch_ie = (void *)pos; 1174 break; 1175 case WLAN_EID_EXT_CHANSWITCH_ANN: 1176 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1177 elem_parse_failed = true; 1178 break; 1179 } 1180 elems->ext_chansw_ie = (void *)pos; 1181 break; 1182 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1183 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1184 elem_parse_failed = true; 1185 break; 1186 } 1187 elems->sec_chan_offs = (void *)pos; 1188 break; 1189 case WLAN_EID_CHAN_SWITCH_PARAM: 1190 if (elen != 1191 sizeof(*elems->mesh_chansw_params_ie)) { 1192 elem_parse_failed = true; 1193 break; 1194 } 1195 elems->mesh_chansw_params_ie = (void *)pos; 1196 break; 1197 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1198 if (!action || 1199 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1200 elem_parse_failed = true; 1201 break; 1202 } 1203 elems->wide_bw_chansw_ie = (void *)pos; 1204 break; 1205 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1206 if (action) { 1207 elem_parse_failed = true; 1208 break; 1209 } 1210 /* 1211 * This is a bit tricky, but as we only care about 1212 * the wide bandwidth channel switch element, so 1213 * just parse it out manually. 1214 */ 1215 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1216 pos, elen); 1217 if (ie) { 1218 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1219 elems->wide_bw_chansw_ie = 1220 (void *)(ie + 2); 1221 else 1222 elem_parse_failed = true; 1223 } 1224 break; 1225 case WLAN_EID_COUNTRY: 1226 elems->country_elem = pos; 1227 elems->country_elem_len = elen; 1228 break; 1229 case WLAN_EID_PWR_CONSTRAINT: 1230 if (elen != 1) { 1231 elem_parse_failed = true; 1232 break; 1233 } 1234 elems->pwr_constr_elem = pos; 1235 break; 1236 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1237 /* Lots of different options exist, but we only care 1238 * about the Dynamic Transmit Power Control element. 1239 * First check for the Cisco OUI, then for the DTPC 1240 * tag (0x00). 1241 */ 1242 if (elen < 4) { 1243 elem_parse_failed = true; 1244 break; 1245 } 1246 1247 if (pos[0] != 0x00 || pos[1] != 0x40 || 1248 pos[2] != 0x96 || pos[3] != 0x00) 1249 break; 1250 1251 if (elen != 6) { 1252 elem_parse_failed = true; 1253 break; 1254 } 1255 1256 if (calc_crc) 1257 crc = crc32_be(crc, pos - 2, elen + 2); 1258 1259 elems->cisco_dtpc_elem = pos; 1260 break; 1261 case WLAN_EID_ADDBA_EXT: 1262 if (elen != sizeof(struct ieee80211_addba_ext_ie)) { 1263 elem_parse_failed = true; 1264 break; 1265 } 1266 elems->addba_ext_ie = (void *)pos; 1267 break; 1268 case WLAN_EID_TIMEOUT_INTERVAL: 1269 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1270 elems->timeout_int = (void *)pos; 1271 else 1272 elem_parse_failed = true; 1273 break; 1274 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1275 if (elen >= sizeof(*elems->max_idle_period_ie)) 1276 elems->max_idle_period_ie = (void *)pos; 1277 break; 1278 case WLAN_EID_RSNX: 1279 elems->rsnx = pos; 1280 elems->rsnx_len = elen; 1281 break; 1282 case WLAN_EID_EXTENSION: 1283 ieee80211_parse_extension_element(calc_crc ? 1284 &crc : NULL, 1285 elem, elems); 1286 break; 1287 default: 1288 break; 1289 } 1290 1291 if (elem_parse_failed) 1292 elems->parse_error = true; 1293 else 1294 __set_bit(id, seen_elems); 1295 } 1296 1297 if (!for_each_element_completed(elem, start, len)) 1298 elems->parse_error = true; 1299 1300 return crc; 1301 } 1302 1303 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1304 struct ieee802_11_elems *elems, 1305 u8 *transmitter_bssid, 1306 u8 *bss_bssid, 1307 u8 *nontransmitted_profile) 1308 { 1309 const struct element *elem, *sub; 1310 size_t profile_len = 0; 1311 bool found = false; 1312 1313 if (!bss_bssid || !transmitter_bssid) 1314 return profile_len; 1315 1316 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1317 if (elem->datalen < 2) 1318 continue; 1319 1320 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1321 u8 new_bssid[ETH_ALEN]; 1322 const u8 *index; 1323 1324 if (sub->id != 0 || sub->datalen < 4) { 1325 /* not a valid BSS profile */ 1326 continue; 1327 } 1328 1329 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1330 sub->data[1] != 2) { 1331 /* The first element of the 1332 * Nontransmitted BSSID Profile is not 1333 * the Nontransmitted BSSID Capability 1334 * element. 1335 */ 1336 continue; 1337 } 1338 1339 memset(nontransmitted_profile, 0, len); 1340 profile_len = cfg80211_merge_profile(start, len, 1341 elem, 1342 sub, 1343 nontransmitted_profile, 1344 len); 1345 1346 /* found a Nontransmitted BSSID Profile */ 1347 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1348 nontransmitted_profile, 1349 profile_len); 1350 if (!index || index[1] < 1 || index[2] == 0) { 1351 /* Invalid MBSSID Index element */ 1352 continue; 1353 } 1354 1355 cfg80211_gen_new_bssid(transmitter_bssid, 1356 elem->data[0], 1357 index[2], 1358 new_bssid); 1359 if (ether_addr_equal(new_bssid, bss_bssid)) { 1360 found = true; 1361 elems->bssid_index_len = index[1]; 1362 elems->bssid_index = (void *)&index[2]; 1363 break; 1364 } 1365 } 1366 } 1367 1368 return found ? profile_len : 0; 1369 } 1370 1371 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 1372 struct ieee802_11_elems *elems, 1373 u64 filter, u32 crc, u8 *transmitter_bssid, 1374 u8 *bss_bssid) 1375 { 1376 const struct element *non_inherit = NULL; 1377 u8 *nontransmitted_profile; 1378 int nontransmitted_profile_len = 0; 1379 1380 memset(elems, 0, sizeof(*elems)); 1381 elems->ie_start = start; 1382 elems->total_len = len; 1383 1384 nontransmitted_profile = kmalloc(len, GFP_ATOMIC); 1385 if (nontransmitted_profile) { 1386 nontransmitted_profile_len = 1387 ieee802_11_find_bssid_profile(start, len, elems, 1388 transmitter_bssid, 1389 bss_bssid, 1390 nontransmitted_profile); 1391 non_inherit = 1392 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1393 nontransmitted_profile, 1394 nontransmitted_profile_len); 1395 } 1396 1397 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter, 1398 crc, non_inherit); 1399 1400 /* Override with nontransmitted profile, if found */ 1401 if (nontransmitted_profile_len) 1402 _ieee802_11_parse_elems_crc(nontransmitted_profile, 1403 nontransmitted_profile_len, 1404 action, elems, 0, 0, NULL); 1405 1406 if (elems->tim && !elems->parse_error) { 1407 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1408 1409 elems->dtim_period = tim_ie->dtim_period; 1410 elems->dtim_count = tim_ie->dtim_count; 1411 } 1412 1413 /* Override DTIM period and count if needed */ 1414 if (elems->bssid_index && 1415 elems->bssid_index_len >= 1416 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1417 elems->dtim_period = elems->bssid_index->dtim_period; 1418 1419 if (elems->bssid_index && 1420 elems->bssid_index_len >= 1421 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1422 elems->dtim_count = elems->bssid_index->dtim_count; 1423 1424 kfree(nontransmitted_profile); 1425 1426 return crc; 1427 } 1428 1429 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1430 struct ieee80211_tx_queue_params 1431 *qparam, int ac) 1432 { 1433 struct ieee80211_chanctx_conf *chanctx_conf; 1434 const struct ieee80211_reg_rule *rrule; 1435 const struct ieee80211_wmm_ac *wmm_ac; 1436 u16 center_freq = 0; 1437 1438 if (sdata->vif.type != NL80211_IFTYPE_AP && 1439 sdata->vif.type != NL80211_IFTYPE_STATION) 1440 return; 1441 1442 rcu_read_lock(); 1443 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1444 if (chanctx_conf) 1445 center_freq = chanctx_conf->def.chan->center_freq; 1446 1447 if (!center_freq) { 1448 rcu_read_unlock(); 1449 return; 1450 } 1451 1452 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1453 1454 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1455 rcu_read_unlock(); 1456 return; 1457 } 1458 1459 if (sdata->vif.type == NL80211_IFTYPE_AP) 1460 wmm_ac = &rrule->wmm_rule.ap[ac]; 1461 else 1462 wmm_ac = &rrule->wmm_rule.client[ac]; 1463 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1464 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1465 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1466 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1467 rcu_read_unlock(); 1468 } 1469 1470 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1471 bool bss_notify, bool enable_qos) 1472 { 1473 struct ieee80211_local *local = sdata->local; 1474 struct ieee80211_tx_queue_params qparam; 1475 struct ieee80211_chanctx_conf *chanctx_conf; 1476 int ac; 1477 bool use_11b; 1478 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1479 int aCWmin, aCWmax; 1480 1481 if (!local->ops->conf_tx) 1482 return; 1483 1484 if (local->hw.queues < IEEE80211_NUM_ACS) 1485 return; 1486 1487 memset(&qparam, 0, sizeof(qparam)); 1488 1489 rcu_read_lock(); 1490 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1491 use_11b = (chanctx_conf && 1492 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1493 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1494 rcu_read_unlock(); 1495 1496 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1497 1498 /* Set defaults according to 802.11-2007 Table 7-37 */ 1499 aCWmax = 1023; 1500 if (use_11b) 1501 aCWmin = 31; 1502 else 1503 aCWmin = 15; 1504 1505 /* Confiure old 802.11b/g medium access rules. */ 1506 qparam.cw_max = aCWmax; 1507 qparam.cw_min = aCWmin; 1508 qparam.txop = 0; 1509 qparam.aifs = 2; 1510 1511 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1512 /* Update if QoS is enabled. */ 1513 if (enable_qos) { 1514 switch (ac) { 1515 case IEEE80211_AC_BK: 1516 qparam.cw_max = aCWmax; 1517 qparam.cw_min = aCWmin; 1518 qparam.txop = 0; 1519 if (is_ocb) 1520 qparam.aifs = 9; 1521 else 1522 qparam.aifs = 7; 1523 break; 1524 /* never happens but let's not leave undefined */ 1525 default: 1526 case IEEE80211_AC_BE: 1527 qparam.cw_max = aCWmax; 1528 qparam.cw_min = aCWmin; 1529 qparam.txop = 0; 1530 if (is_ocb) 1531 qparam.aifs = 6; 1532 else 1533 qparam.aifs = 3; 1534 break; 1535 case IEEE80211_AC_VI: 1536 qparam.cw_max = aCWmin; 1537 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1538 if (is_ocb) 1539 qparam.txop = 0; 1540 else if (use_11b) 1541 qparam.txop = 6016/32; 1542 else 1543 qparam.txop = 3008/32; 1544 1545 if (is_ocb) 1546 qparam.aifs = 3; 1547 else 1548 qparam.aifs = 2; 1549 break; 1550 case IEEE80211_AC_VO: 1551 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1552 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1553 if (is_ocb) 1554 qparam.txop = 0; 1555 else if (use_11b) 1556 qparam.txop = 3264/32; 1557 else 1558 qparam.txop = 1504/32; 1559 qparam.aifs = 2; 1560 break; 1561 } 1562 } 1563 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1564 1565 qparam.uapsd = false; 1566 1567 sdata->tx_conf[ac] = qparam; 1568 drv_conf_tx(local, sdata, ac, &qparam); 1569 } 1570 1571 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1572 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1573 sdata->vif.type != NL80211_IFTYPE_NAN) { 1574 sdata->vif.bss_conf.qos = enable_qos; 1575 if (bss_notify) 1576 ieee80211_bss_info_change_notify(sdata, 1577 BSS_CHANGED_QOS); 1578 } 1579 } 1580 1581 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1582 u16 transaction, u16 auth_alg, u16 status, 1583 const u8 *extra, size_t extra_len, const u8 *da, 1584 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1585 u32 tx_flags) 1586 { 1587 struct ieee80211_local *local = sdata->local; 1588 struct sk_buff *skb; 1589 struct ieee80211_mgmt *mgmt; 1590 int err; 1591 1592 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1593 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1594 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1595 if (!skb) 1596 return; 1597 1598 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1599 1600 mgmt = skb_put_zero(skb, 24 + 6); 1601 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1602 IEEE80211_STYPE_AUTH); 1603 memcpy(mgmt->da, da, ETH_ALEN); 1604 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1605 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1606 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1607 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1608 mgmt->u.auth.status_code = cpu_to_le16(status); 1609 if (extra) 1610 skb_put_data(skb, extra, extra_len); 1611 1612 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1613 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1614 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1615 WARN_ON(err); 1616 } 1617 1618 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1619 tx_flags; 1620 ieee80211_tx_skb(sdata, skb); 1621 } 1622 1623 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1624 const u8 *da, const u8 *bssid, 1625 u16 stype, u16 reason, 1626 bool send_frame, u8 *frame_buf) 1627 { 1628 struct ieee80211_local *local = sdata->local; 1629 struct sk_buff *skb; 1630 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1631 1632 /* build frame */ 1633 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1634 mgmt->duration = 0; /* initialize only */ 1635 mgmt->seq_ctrl = 0; /* initialize only */ 1636 memcpy(mgmt->da, da, ETH_ALEN); 1637 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1638 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1639 /* u.deauth.reason_code == u.disassoc.reason_code */ 1640 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1641 1642 if (send_frame) { 1643 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1644 IEEE80211_DEAUTH_FRAME_LEN); 1645 if (!skb) 1646 return; 1647 1648 skb_reserve(skb, local->hw.extra_tx_headroom); 1649 1650 /* copy in frame */ 1651 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1652 1653 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1654 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1655 IEEE80211_SKB_CB(skb)->flags |= 1656 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1657 1658 ieee80211_tx_skb(sdata, skb); 1659 } 1660 } 1661 1662 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1663 u8 *buffer, size_t buffer_len, 1664 const u8 *ie, size_t ie_len, 1665 enum nl80211_band band, 1666 u32 rate_mask, 1667 struct cfg80211_chan_def *chandef, 1668 size_t *offset, u32 flags) 1669 { 1670 struct ieee80211_supported_band *sband; 1671 const struct ieee80211_sta_he_cap *he_cap; 1672 u8 *pos = buffer, *end = buffer + buffer_len; 1673 size_t noffset; 1674 int supp_rates_len, i; 1675 u8 rates[32]; 1676 int num_rates; 1677 int ext_rates_len; 1678 int shift; 1679 u32 rate_flags; 1680 bool have_80mhz = false; 1681 1682 *offset = 0; 1683 1684 sband = local->hw.wiphy->bands[band]; 1685 if (WARN_ON_ONCE(!sband)) 1686 return 0; 1687 1688 rate_flags = ieee80211_chandef_rate_flags(chandef); 1689 shift = ieee80211_chandef_get_shift(chandef); 1690 1691 num_rates = 0; 1692 for (i = 0; i < sband->n_bitrates; i++) { 1693 if ((BIT(i) & rate_mask) == 0) 1694 continue; /* skip rate */ 1695 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1696 continue; 1697 1698 rates[num_rates++] = 1699 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1700 (1 << shift) * 5); 1701 } 1702 1703 supp_rates_len = min_t(int, num_rates, 8); 1704 1705 if (end - pos < 2 + supp_rates_len) 1706 goto out_err; 1707 *pos++ = WLAN_EID_SUPP_RATES; 1708 *pos++ = supp_rates_len; 1709 memcpy(pos, rates, supp_rates_len); 1710 pos += supp_rates_len; 1711 1712 /* insert "request information" if in custom IEs */ 1713 if (ie && ie_len) { 1714 static const u8 before_extrates[] = { 1715 WLAN_EID_SSID, 1716 WLAN_EID_SUPP_RATES, 1717 WLAN_EID_REQUEST, 1718 }; 1719 noffset = ieee80211_ie_split(ie, ie_len, 1720 before_extrates, 1721 ARRAY_SIZE(before_extrates), 1722 *offset); 1723 if (end - pos < noffset - *offset) 1724 goto out_err; 1725 memcpy(pos, ie + *offset, noffset - *offset); 1726 pos += noffset - *offset; 1727 *offset = noffset; 1728 } 1729 1730 ext_rates_len = num_rates - supp_rates_len; 1731 if (ext_rates_len > 0) { 1732 if (end - pos < 2 + ext_rates_len) 1733 goto out_err; 1734 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1735 *pos++ = ext_rates_len; 1736 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1737 pos += ext_rates_len; 1738 } 1739 1740 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1741 if (end - pos < 3) 1742 goto out_err; 1743 *pos++ = WLAN_EID_DS_PARAMS; 1744 *pos++ = 1; 1745 *pos++ = ieee80211_frequency_to_channel( 1746 chandef->chan->center_freq); 1747 } 1748 1749 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1750 goto done; 1751 1752 /* insert custom IEs that go before HT */ 1753 if (ie && ie_len) { 1754 static const u8 before_ht[] = { 1755 /* 1756 * no need to list the ones split off already 1757 * (or generated here) 1758 */ 1759 WLAN_EID_DS_PARAMS, 1760 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1761 }; 1762 noffset = ieee80211_ie_split(ie, ie_len, 1763 before_ht, ARRAY_SIZE(before_ht), 1764 *offset); 1765 if (end - pos < noffset - *offset) 1766 goto out_err; 1767 memcpy(pos, ie + *offset, noffset - *offset); 1768 pos += noffset - *offset; 1769 *offset = noffset; 1770 } 1771 1772 if (sband->ht_cap.ht_supported) { 1773 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1774 goto out_err; 1775 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1776 sband->ht_cap.cap); 1777 } 1778 1779 /* insert custom IEs that go before VHT */ 1780 if (ie && ie_len) { 1781 static const u8 before_vht[] = { 1782 /* 1783 * no need to list the ones split off already 1784 * (or generated here) 1785 */ 1786 WLAN_EID_BSS_COEX_2040, 1787 WLAN_EID_EXT_CAPABILITY, 1788 WLAN_EID_SSID_LIST, 1789 WLAN_EID_CHANNEL_USAGE, 1790 WLAN_EID_INTERWORKING, 1791 WLAN_EID_MESH_ID, 1792 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1793 }; 1794 noffset = ieee80211_ie_split(ie, ie_len, 1795 before_vht, ARRAY_SIZE(before_vht), 1796 *offset); 1797 if (end - pos < noffset - *offset) 1798 goto out_err; 1799 memcpy(pos, ie + *offset, noffset - *offset); 1800 pos += noffset - *offset; 1801 *offset = noffset; 1802 } 1803 1804 /* Check if any channel in this sband supports at least 80 MHz */ 1805 for (i = 0; i < sband->n_channels; i++) { 1806 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1807 IEEE80211_CHAN_NO_80MHZ)) 1808 continue; 1809 1810 have_80mhz = true; 1811 break; 1812 } 1813 1814 if (sband->vht_cap.vht_supported && have_80mhz) { 1815 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1816 goto out_err; 1817 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1818 sband->vht_cap.cap); 1819 } 1820 1821 /* insert custom IEs that go before HE */ 1822 if (ie && ie_len) { 1823 static const u8 before_he[] = { 1824 /* 1825 * no need to list the ones split off before VHT 1826 * or generated here 1827 */ 1828 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1829 WLAN_EID_AP_CSN, 1830 /* TODO: add 11ah/11aj/11ak elements */ 1831 }; 1832 noffset = ieee80211_ie_split(ie, ie_len, 1833 before_he, ARRAY_SIZE(before_he), 1834 *offset); 1835 if (end - pos < noffset - *offset) 1836 goto out_err; 1837 memcpy(pos, ie + *offset, noffset - *offset); 1838 pos += noffset - *offset; 1839 *offset = noffset; 1840 } 1841 1842 he_cap = ieee80211_get_he_sta_cap(sband); 1843 if (he_cap) { 1844 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1845 if (!pos) 1846 goto out_err; 1847 } 1848 1849 /* 1850 * If adding more here, adjust code in main.c 1851 * that calculates local->scan_ies_len. 1852 */ 1853 1854 return pos - buffer; 1855 out_err: 1856 WARN_ONCE(1, "not enough space for preq IEs\n"); 1857 done: 1858 return pos - buffer; 1859 } 1860 1861 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1862 size_t buffer_len, 1863 struct ieee80211_scan_ies *ie_desc, 1864 const u8 *ie, size_t ie_len, 1865 u8 bands_used, u32 *rate_masks, 1866 struct cfg80211_chan_def *chandef, 1867 u32 flags) 1868 { 1869 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1870 int i; 1871 1872 memset(ie_desc, 0, sizeof(*ie_desc)); 1873 1874 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1875 if (bands_used & BIT(i)) { 1876 pos += ieee80211_build_preq_ies_band(local, 1877 buffer + pos, 1878 buffer_len - pos, 1879 ie, ie_len, i, 1880 rate_masks[i], 1881 chandef, 1882 &custom_ie_offset, 1883 flags); 1884 ie_desc->ies[i] = buffer + old_pos; 1885 ie_desc->len[i] = pos - old_pos; 1886 old_pos = pos; 1887 } 1888 } 1889 1890 /* add any remaining custom IEs */ 1891 if (ie && ie_len) { 1892 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1893 "not enough space for preq custom IEs\n")) 1894 return pos; 1895 memcpy(buffer + pos, ie + custom_ie_offset, 1896 ie_len - custom_ie_offset); 1897 ie_desc->common_ies = buffer + pos; 1898 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1899 pos += ie_len - custom_ie_offset; 1900 } 1901 1902 return pos; 1903 }; 1904 1905 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1906 const u8 *src, const u8 *dst, 1907 u32 ratemask, 1908 struct ieee80211_channel *chan, 1909 const u8 *ssid, size_t ssid_len, 1910 const u8 *ie, size_t ie_len, 1911 u32 flags) 1912 { 1913 struct ieee80211_local *local = sdata->local; 1914 struct cfg80211_chan_def chandef; 1915 struct sk_buff *skb; 1916 struct ieee80211_mgmt *mgmt; 1917 int ies_len; 1918 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1919 struct ieee80211_scan_ies dummy_ie_desc; 1920 1921 /* 1922 * Do not send DS Channel parameter for directed probe requests 1923 * in order to maximize the chance that we get a response. Some 1924 * badly-behaved APs don't respond when this parameter is included. 1925 */ 1926 chandef.width = sdata->vif.bss_conf.chandef.width; 1927 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1928 chandef.chan = NULL; 1929 else 1930 chandef.chan = chan; 1931 1932 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1933 100 + ie_len); 1934 if (!skb) 1935 return NULL; 1936 1937 rate_masks[chan->band] = ratemask; 1938 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1939 skb_tailroom(skb), &dummy_ie_desc, 1940 ie, ie_len, BIT(chan->band), 1941 rate_masks, &chandef, flags); 1942 skb_put(skb, ies_len); 1943 1944 if (dst) { 1945 mgmt = (struct ieee80211_mgmt *) skb->data; 1946 memcpy(mgmt->da, dst, ETH_ALEN); 1947 memcpy(mgmt->bssid, dst, ETH_ALEN); 1948 } 1949 1950 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1951 1952 return skb; 1953 } 1954 1955 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1956 struct ieee802_11_elems *elems, 1957 enum nl80211_band band, u32 *basic_rates) 1958 { 1959 struct ieee80211_supported_band *sband; 1960 size_t num_rates; 1961 u32 supp_rates, rate_flags; 1962 int i, j, shift; 1963 1964 sband = sdata->local->hw.wiphy->bands[band]; 1965 if (WARN_ON(!sband)) 1966 return 1; 1967 1968 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1969 shift = ieee80211_vif_get_shift(&sdata->vif); 1970 1971 num_rates = sband->n_bitrates; 1972 supp_rates = 0; 1973 for (i = 0; i < elems->supp_rates_len + 1974 elems->ext_supp_rates_len; i++) { 1975 u8 rate = 0; 1976 int own_rate; 1977 bool is_basic; 1978 if (i < elems->supp_rates_len) 1979 rate = elems->supp_rates[i]; 1980 else if (elems->ext_supp_rates) 1981 rate = elems->ext_supp_rates 1982 [i - elems->supp_rates_len]; 1983 own_rate = 5 * (rate & 0x7f); 1984 is_basic = !!(rate & 0x80); 1985 1986 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1987 continue; 1988 1989 for (j = 0; j < num_rates; j++) { 1990 int brate; 1991 if ((rate_flags & sband->bitrates[j].flags) 1992 != rate_flags) 1993 continue; 1994 1995 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1996 1 << shift); 1997 1998 if (brate == own_rate) { 1999 supp_rates |= BIT(j); 2000 if (basic_rates && is_basic) 2001 *basic_rates |= BIT(j); 2002 } 2003 } 2004 } 2005 return supp_rates; 2006 } 2007 2008 void ieee80211_stop_device(struct ieee80211_local *local) 2009 { 2010 ieee80211_led_radio(local, false); 2011 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 2012 2013 cancel_work_sync(&local->reconfig_filter); 2014 2015 flush_workqueue(local->workqueue); 2016 drv_stop(local); 2017 } 2018 2019 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 2020 bool aborted) 2021 { 2022 /* It's possible that we don't handle the scan completion in 2023 * time during suspend, so if it's still marked as completed 2024 * here, queue the work and flush it to clean things up. 2025 * Instead of calling the worker function directly here, we 2026 * really queue it to avoid potential races with other flows 2027 * scheduling the same work. 2028 */ 2029 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2030 /* If coming from reconfiguration failure, abort the scan so 2031 * we don't attempt to continue a partial HW scan - which is 2032 * possible otherwise if (e.g.) the 2.4 GHz portion was the 2033 * completed scan, and a 5 GHz portion is still pending. 2034 */ 2035 if (aborted) 2036 set_bit(SCAN_ABORTED, &local->scanning); 2037 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2038 flush_delayed_work(&local->scan_work); 2039 } 2040 } 2041 2042 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 2043 { 2044 struct ieee80211_sub_if_data *sdata; 2045 struct ieee80211_chanctx *ctx; 2046 2047 /* 2048 * We get here if during resume the device can't be restarted properly. 2049 * We might also get here if this happens during HW reset, which is a 2050 * slightly different situation and we need to drop all connections in 2051 * the latter case. 2052 * 2053 * Ask cfg80211 to turn off all interfaces, this will result in more 2054 * warnings but at least we'll then get into a clean stopped state. 2055 */ 2056 2057 local->resuming = false; 2058 local->suspended = false; 2059 local->in_reconfig = false; 2060 2061 ieee80211_flush_completed_scan(local, true); 2062 2063 /* scheduled scan clearly can't be running any more, but tell 2064 * cfg80211 and clear local state 2065 */ 2066 ieee80211_sched_scan_end(local); 2067 2068 list_for_each_entry(sdata, &local->interfaces, list) 2069 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2070 2071 /* Mark channel contexts as not being in the driver any more to avoid 2072 * removing them from the driver during the shutdown process... 2073 */ 2074 mutex_lock(&local->chanctx_mtx); 2075 list_for_each_entry(ctx, &local->chanctx_list, list) 2076 ctx->driver_present = false; 2077 mutex_unlock(&local->chanctx_mtx); 2078 2079 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2080 } 2081 2082 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2083 struct ieee80211_sub_if_data *sdata) 2084 { 2085 struct ieee80211_chanctx_conf *conf; 2086 struct ieee80211_chanctx *ctx; 2087 2088 if (!local->use_chanctx) 2089 return; 2090 2091 mutex_lock(&local->chanctx_mtx); 2092 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2093 lockdep_is_held(&local->chanctx_mtx)); 2094 if (conf) { 2095 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2096 drv_assign_vif_chanctx(local, sdata, ctx); 2097 } 2098 mutex_unlock(&local->chanctx_mtx); 2099 } 2100 2101 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2102 { 2103 struct ieee80211_local *local = sdata->local; 2104 struct sta_info *sta; 2105 2106 /* add STAs back */ 2107 mutex_lock(&local->sta_mtx); 2108 list_for_each_entry(sta, &local->sta_list, list) { 2109 enum ieee80211_sta_state state; 2110 2111 if (!sta->uploaded || sta->sdata != sdata) 2112 continue; 2113 2114 for (state = IEEE80211_STA_NOTEXIST; 2115 state < sta->sta_state; state++) 2116 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2117 state + 1)); 2118 } 2119 mutex_unlock(&local->sta_mtx); 2120 } 2121 2122 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2123 { 2124 struct cfg80211_nan_func *func, **funcs; 2125 int res, id, i = 0; 2126 2127 res = drv_start_nan(sdata->local, sdata, 2128 &sdata->u.nan.conf); 2129 if (WARN_ON(res)) 2130 return res; 2131 2132 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2133 sizeof(*funcs), 2134 GFP_KERNEL); 2135 if (!funcs) 2136 return -ENOMEM; 2137 2138 /* Add all the functions: 2139 * This is a little bit ugly. We need to call a potentially sleeping 2140 * callback for each NAN function, so we can't hold the spinlock. 2141 */ 2142 spin_lock_bh(&sdata->u.nan.func_lock); 2143 2144 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2145 funcs[i++] = func; 2146 2147 spin_unlock_bh(&sdata->u.nan.func_lock); 2148 2149 for (i = 0; funcs[i]; i++) { 2150 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2151 if (WARN_ON(res)) 2152 ieee80211_nan_func_terminated(&sdata->vif, 2153 funcs[i]->instance_id, 2154 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2155 GFP_KERNEL); 2156 } 2157 2158 kfree(funcs); 2159 2160 return 0; 2161 } 2162 2163 int ieee80211_reconfig(struct ieee80211_local *local) 2164 { 2165 struct ieee80211_hw *hw = &local->hw; 2166 struct ieee80211_sub_if_data *sdata; 2167 struct ieee80211_chanctx *ctx; 2168 struct sta_info *sta; 2169 int res, i; 2170 bool reconfig_due_to_wowlan = false; 2171 struct ieee80211_sub_if_data *sched_scan_sdata; 2172 struct cfg80211_sched_scan_request *sched_scan_req; 2173 bool sched_scan_stopped = false; 2174 bool suspended = local->suspended; 2175 2176 /* nothing to do if HW shouldn't run */ 2177 if (!local->open_count) 2178 goto wake_up; 2179 2180 #ifdef CONFIG_PM 2181 if (suspended) 2182 local->resuming = true; 2183 2184 if (local->wowlan) { 2185 /* 2186 * In the wowlan case, both mac80211 and the device 2187 * are functional when the resume op is called, so 2188 * clear local->suspended so the device could operate 2189 * normally (e.g. pass rx frames). 2190 */ 2191 local->suspended = false; 2192 res = drv_resume(local); 2193 local->wowlan = false; 2194 if (res < 0) { 2195 local->resuming = false; 2196 return res; 2197 } 2198 if (res == 0) 2199 goto wake_up; 2200 WARN_ON(res > 1); 2201 /* 2202 * res is 1, which means the driver requested 2203 * to go through a regular reset on wakeup. 2204 * restore local->suspended in this case. 2205 */ 2206 reconfig_due_to_wowlan = true; 2207 local->suspended = true; 2208 } 2209 #endif 2210 2211 /* 2212 * In case of hw_restart during suspend (without wowlan), 2213 * cancel restart work, as we are reconfiguring the device 2214 * anyway. 2215 * Note that restart_work is scheduled on a frozen workqueue, 2216 * so we can't deadlock in this case. 2217 */ 2218 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2219 cancel_work_sync(&local->restart_work); 2220 2221 local->started = false; 2222 2223 /* 2224 * Upon resume hardware can sometimes be goofy due to 2225 * various platform / driver / bus issues, so restarting 2226 * the device may at times not work immediately. Propagate 2227 * the error. 2228 */ 2229 res = drv_start(local); 2230 if (res) { 2231 if (suspended) 2232 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2233 else 2234 WARN(1, "Hardware became unavailable during restart.\n"); 2235 ieee80211_handle_reconfig_failure(local); 2236 return res; 2237 } 2238 2239 /* setup fragmentation threshold */ 2240 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2241 2242 /* setup RTS threshold */ 2243 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2244 2245 /* reset coverage class */ 2246 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2247 2248 ieee80211_led_radio(local, true); 2249 ieee80211_mod_tpt_led_trig(local, 2250 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2251 2252 /* add interfaces */ 2253 sdata = rtnl_dereference(local->monitor_sdata); 2254 if (sdata) { 2255 /* in HW restart it exists already */ 2256 WARN_ON(local->resuming); 2257 res = drv_add_interface(local, sdata); 2258 if (WARN_ON(res)) { 2259 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2260 synchronize_net(); 2261 kfree(sdata); 2262 } 2263 } 2264 2265 list_for_each_entry(sdata, &local->interfaces, list) { 2266 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2267 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2268 ieee80211_sdata_running(sdata)) { 2269 res = drv_add_interface(local, sdata); 2270 if (WARN_ON(res)) 2271 break; 2272 } 2273 } 2274 2275 /* If adding any of the interfaces failed above, roll back and 2276 * report failure. 2277 */ 2278 if (res) { 2279 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2280 list) 2281 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2282 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2283 ieee80211_sdata_running(sdata)) 2284 drv_remove_interface(local, sdata); 2285 ieee80211_handle_reconfig_failure(local); 2286 return res; 2287 } 2288 2289 /* add channel contexts */ 2290 if (local->use_chanctx) { 2291 mutex_lock(&local->chanctx_mtx); 2292 list_for_each_entry(ctx, &local->chanctx_list, list) 2293 if (ctx->replace_state != 2294 IEEE80211_CHANCTX_REPLACES_OTHER) 2295 WARN_ON(drv_add_chanctx(local, ctx)); 2296 mutex_unlock(&local->chanctx_mtx); 2297 2298 sdata = rtnl_dereference(local->monitor_sdata); 2299 if (sdata && ieee80211_sdata_running(sdata)) 2300 ieee80211_assign_chanctx(local, sdata); 2301 } 2302 2303 /* reconfigure hardware */ 2304 ieee80211_hw_config(local, ~0); 2305 2306 ieee80211_configure_filter(local); 2307 2308 /* Finally also reconfigure all the BSS information */ 2309 list_for_each_entry(sdata, &local->interfaces, list) { 2310 u32 changed; 2311 2312 if (!ieee80211_sdata_running(sdata)) 2313 continue; 2314 2315 ieee80211_assign_chanctx(local, sdata); 2316 2317 switch (sdata->vif.type) { 2318 case NL80211_IFTYPE_AP_VLAN: 2319 case NL80211_IFTYPE_MONITOR: 2320 break; 2321 case NL80211_IFTYPE_ADHOC: 2322 if (sdata->vif.bss_conf.ibss_joined) 2323 WARN_ON(drv_join_ibss(local, sdata)); 2324 /* fall through */ 2325 default: 2326 ieee80211_reconfig_stations(sdata); 2327 /* fall through */ 2328 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2329 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2330 drv_conf_tx(local, sdata, i, 2331 &sdata->tx_conf[i]); 2332 break; 2333 } 2334 2335 /* common change flags for all interface types */ 2336 changed = BSS_CHANGED_ERP_CTS_PROT | 2337 BSS_CHANGED_ERP_PREAMBLE | 2338 BSS_CHANGED_ERP_SLOT | 2339 BSS_CHANGED_HT | 2340 BSS_CHANGED_BASIC_RATES | 2341 BSS_CHANGED_BEACON_INT | 2342 BSS_CHANGED_BSSID | 2343 BSS_CHANGED_CQM | 2344 BSS_CHANGED_QOS | 2345 BSS_CHANGED_IDLE | 2346 BSS_CHANGED_TXPOWER | 2347 BSS_CHANGED_MCAST_RATE; 2348 2349 if (sdata->vif.mu_mimo_owner) 2350 changed |= BSS_CHANGED_MU_GROUPS; 2351 2352 switch (sdata->vif.type) { 2353 case NL80211_IFTYPE_STATION: 2354 changed |= BSS_CHANGED_ASSOC | 2355 BSS_CHANGED_ARP_FILTER | 2356 BSS_CHANGED_PS; 2357 2358 /* Re-send beacon info report to the driver */ 2359 if (sdata->u.mgd.have_beacon) 2360 changed |= BSS_CHANGED_BEACON_INFO; 2361 2362 if (sdata->vif.bss_conf.max_idle_period || 2363 sdata->vif.bss_conf.protected_keep_alive) 2364 changed |= BSS_CHANGED_KEEP_ALIVE; 2365 2366 sdata_lock(sdata); 2367 ieee80211_bss_info_change_notify(sdata, changed); 2368 sdata_unlock(sdata); 2369 break; 2370 case NL80211_IFTYPE_OCB: 2371 changed |= BSS_CHANGED_OCB; 2372 ieee80211_bss_info_change_notify(sdata, changed); 2373 break; 2374 case NL80211_IFTYPE_ADHOC: 2375 changed |= BSS_CHANGED_IBSS; 2376 /* fall through */ 2377 case NL80211_IFTYPE_AP: 2378 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2379 2380 if (sdata->vif.bss_conf.ftm_responder == 1 && 2381 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2382 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2383 changed |= BSS_CHANGED_FTM_RESPONDER; 2384 2385 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2386 changed |= BSS_CHANGED_AP_PROBE_RESP; 2387 2388 if (rcu_access_pointer(sdata->u.ap.beacon)) 2389 drv_start_ap(local, sdata); 2390 } 2391 2392 /* fall through */ 2393 case NL80211_IFTYPE_MESH_POINT: 2394 if (sdata->vif.bss_conf.enable_beacon) { 2395 changed |= BSS_CHANGED_BEACON | 2396 BSS_CHANGED_BEACON_ENABLED; 2397 ieee80211_bss_info_change_notify(sdata, changed); 2398 } 2399 break; 2400 case NL80211_IFTYPE_NAN: 2401 res = ieee80211_reconfig_nan(sdata); 2402 if (res < 0) { 2403 ieee80211_handle_reconfig_failure(local); 2404 return res; 2405 } 2406 break; 2407 case NL80211_IFTYPE_WDS: 2408 case NL80211_IFTYPE_AP_VLAN: 2409 case NL80211_IFTYPE_MONITOR: 2410 case NL80211_IFTYPE_P2P_DEVICE: 2411 /* nothing to do */ 2412 break; 2413 case NL80211_IFTYPE_UNSPECIFIED: 2414 case NUM_NL80211_IFTYPES: 2415 case NL80211_IFTYPE_P2P_CLIENT: 2416 case NL80211_IFTYPE_P2P_GO: 2417 WARN_ON(1); 2418 break; 2419 } 2420 } 2421 2422 ieee80211_recalc_ps(local); 2423 2424 /* 2425 * The sta might be in psm against the ap (e.g. because 2426 * this was the state before a hw restart), so we 2427 * explicitly send a null packet in order to make sure 2428 * it'll sync against the ap (and get out of psm). 2429 */ 2430 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2431 list_for_each_entry(sdata, &local->interfaces, list) { 2432 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2433 continue; 2434 if (!sdata->u.mgd.associated) 2435 continue; 2436 2437 ieee80211_send_nullfunc(local, sdata, false); 2438 } 2439 } 2440 2441 /* APs are now beaconing, add back stations */ 2442 mutex_lock(&local->sta_mtx); 2443 list_for_each_entry(sta, &local->sta_list, list) { 2444 enum ieee80211_sta_state state; 2445 2446 if (!sta->uploaded) 2447 continue; 2448 2449 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2450 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2451 continue; 2452 2453 for (state = IEEE80211_STA_NOTEXIST; 2454 state < sta->sta_state; state++) 2455 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2456 state + 1)); 2457 } 2458 mutex_unlock(&local->sta_mtx); 2459 2460 /* add back keys */ 2461 list_for_each_entry(sdata, &local->interfaces, list) 2462 ieee80211_reenable_keys(sdata); 2463 2464 /* Reconfigure sched scan if it was interrupted by FW restart */ 2465 mutex_lock(&local->mtx); 2466 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2467 lockdep_is_held(&local->mtx)); 2468 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2469 lockdep_is_held(&local->mtx)); 2470 if (sched_scan_sdata && sched_scan_req) 2471 /* 2472 * Sched scan stopped, but we don't want to report it. Instead, 2473 * we're trying to reschedule. However, if more than one scan 2474 * plan was set, we cannot reschedule since we don't know which 2475 * scan plan was currently running (and some scan plans may have 2476 * already finished). 2477 */ 2478 if (sched_scan_req->n_scan_plans > 1 || 2479 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2480 sched_scan_req)) { 2481 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2482 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2483 sched_scan_stopped = true; 2484 } 2485 mutex_unlock(&local->mtx); 2486 2487 if (sched_scan_stopped) 2488 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2489 2490 wake_up: 2491 2492 if (local->monitors == local->open_count && local->monitors > 0) 2493 ieee80211_add_virtual_monitor(local); 2494 2495 /* 2496 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2497 * sessions can be established after a resume. 2498 * 2499 * Also tear down aggregation sessions since reconfiguring 2500 * them in a hardware restart scenario is not easily done 2501 * right now, and the hardware will have lost information 2502 * about the sessions, but we and the AP still think they 2503 * are active. This is really a workaround though. 2504 */ 2505 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2506 mutex_lock(&local->sta_mtx); 2507 2508 list_for_each_entry(sta, &local->sta_list, list) { 2509 if (!local->resuming) 2510 ieee80211_sta_tear_down_BA_sessions( 2511 sta, AGG_STOP_LOCAL_REQUEST); 2512 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2513 } 2514 2515 mutex_unlock(&local->sta_mtx); 2516 } 2517 2518 if (local->in_reconfig) { 2519 local->in_reconfig = false; 2520 barrier(); 2521 2522 /* Restart deferred ROCs */ 2523 mutex_lock(&local->mtx); 2524 ieee80211_start_next_roc(local); 2525 mutex_unlock(&local->mtx); 2526 2527 /* Requeue all works */ 2528 list_for_each_entry(sdata, &local->interfaces, list) 2529 ieee80211_queue_work(&local->hw, &sdata->work); 2530 } 2531 2532 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2533 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2534 false); 2535 2536 /* 2537 * If this is for hw restart things are still running. 2538 * We may want to change that later, however. 2539 */ 2540 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2541 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2542 2543 if (!suspended) 2544 return 0; 2545 2546 #ifdef CONFIG_PM 2547 /* first set suspended false, then resuming */ 2548 local->suspended = false; 2549 mb(); 2550 local->resuming = false; 2551 2552 ieee80211_flush_completed_scan(local, false); 2553 2554 if (local->open_count && !reconfig_due_to_wowlan) 2555 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2556 2557 list_for_each_entry(sdata, &local->interfaces, list) { 2558 if (!ieee80211_sdata_running(sdata)) 2559 continue; 2560 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2561 ieee80211_sta_restart(sdata); 2562 } 2563 2564 mod_timer(&local->sta_cleanup, jiffies + 1); 2565 #else 2566 WARN_ON(1); 2567 #endif 2568 2569 return 0; 2570 } 2571 2572 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2573 { 2574 struct ieee80211_sub_if_data *sdata; 2575 struct ieee80211_local *local; 2576 struct ieee80211_key *key; 2577 2578 if (WARN_ON(!vif)) 2579 return; 2580 2581 sdata = vif_to_sdata(vif); 2582 local = sdata->local; 2583 2584 if (WARN_ON(!local->resuming)) 2585 return; 2586 2587 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2588 return; 2589 2590 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2591 2592 mutex_lock(&local->key_mtx); 2593 list_for_each_entry(key, &sdata->key_list, list) 2594 key->flags |= KEY_FLAG_TAINTED; 2595 mutex_unlock(&local->key_mtx); 2596 } 2597 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2598 2599 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2600 { 2601 struct ieee80211_local *local = sdata->local; 2602 struct ieee80211_chanctx_conf *chanctx_conf; 2603 struct ieee80211_chanctx *chanctx; 2604 2605 mutex_lock(&local->chanctx_mtx); 2606 2607 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2608 lockdep_is_held(&local->chanctx_mtx)); 2609 2610 /* 2611 * This function can be called from a work, thus it may be possible 2612 * that the chanctx_conf is removed (due to a disconnection, for 2613 * example). 2614 * So nothing should be done in such case. 2615 */ 2616 if (!chanctx_conf) 2617 goto unlock; 2618 2619 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2620 ieee80211_recalc_smps_chanctx(local, chanctx); 2621 unlock: 2622 mutex_unlock(&local->chanctx_mtx); 2623 } 2624 2625 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2626 { 2627 struct ieee80211_local *local = sdata->local; 2628 struct ieee80211_chanctx_conf *chanctx_conf; 2629 struct ieee80211_chanctx *chanctx; 2630 2631 mutex_lock(&local->chanctx_mtx); 2632 2633 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2634 lockdep_is_held(&local->chanctx_mtx)); 2635 2636 if (WARN_ON_ONCE(!chanctx_conf)) 2637 goto unlock; 2638 2639 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2640 ieee80211_recalc_chanctx_min_def(local, chanctx); 2641 unlock: 2642 mutex_unlock(&local->chanctx_mtx); 2643 } 2644 2645 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2646 { 2647 size_t pos = offset; 2648 2649 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2650 pos += 2 + ies[pos + 1]; 2651 2652 return pos; 2653 } 2654 2655 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2656 int rssi_min_thold, 2657 int rssi_max_thold) 2658 { 2659 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2660 2661 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2662 return; 2663 2664 /* 2665 * Scale up threshold values before storing it, as the RSSI averaging 2666 * algorithm uses a scaled up value as well. Change this scaling 2667 * factor if the RSSI averaging algorithm changes. 2668 */ 2669 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2670 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2671 } 2672 2673 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2674 int rssi_min_thold, 2675 int rssi_max_thold) 2676 { 2677 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2678 2679 WARN_ON(rssi_min_thold == rssi_max_thold || 2680 rssi_min_thold > rssi_max_thold); 2681 2682 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2683 rssi_max_thold); 2684 } 2685 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2686 2687 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2688 { 2689 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2690 2691 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2692 } 2693 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2694 2695 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2696 u16 cap) 2697 { 2698 __le16 tmp; 2699 2700 *pos++ = WLAN_EID_HT_CAPABILITY; 2701 *pos++ = sizeof(struct ieee80211_ht_cap); 2702 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2703 2704 /* capability flags */ 2705 tmp = cpu_to_le16(cap); 2706 memcpy(pos, &tmp, sizeof(u16)); 2707 pos += sizeof(u16); 2708 2709 /* AMPDU parameters */ 2710 *pos++ = ht_cap->ampdu_factor | 2711 (ht_cap->ampdu_density << 2712 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2713 2714 /* MCS set */ 2715 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2716 pos += sizeof(ht_cap->mcs); 2717 2718 /* extended capabilities */ 2719 pos += sizeof(__le16); 2720 2721 /* BF capabilities */ 2722 pos += sizeof(__le32); 2723 2724 /* antenna selection */ 2725 pos += sizeof(u8); 2726 2727 return pos; 2728 } 2729 2730 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2731 u32 cap) 2732 { 2733 __le32 tmp; 2734 2735 *pos++ = WLAN_EID_VHT_CAPABILITY; 2736 *pos++ = sizeof(struct ieee80211_vht_cap); 2737 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2738 2739 /* capability flags */ 2740 tmp = cpu_to_le32(cap); 2741 memcpy(pos, &tmp, sizeof(u32)); 2742 pos += sizeof(u32); 2743 2744 /* VHT MCS set */ 2745 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2746 pos += sizeof(vht_cap->vht_mcs); 2747 2748 return pos; 2749 } 2750 2751 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 2752 { 2753 const struct ieee80211_sta_he_cap *he_cap; 2754 struct ieee80211_supported_band *sband; 2755 u8 n; 2756 2757 sband = ieee80211_get_sband(sdata); 2758 if (!sband) 2759 return 0; 2760 2761 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 2762 if (!he_cap) 2763 return 0; 2764 2765 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2766 return 2 + 1 + 2767 sizeof(he_cap->he_cap_elem) + n + 2768 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2769 he_cap->he_cap_elem.phy_cap_info); 2770 } 2771 2772 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2773 const struct ieee80211_sta_he_cap *he_cap, 2774 u8 *end) 2775 { 2776 u8 n; 2777 u8 ie_len; 2778 u8 *orig_pos = pos; 2779 2780 /* Make sure we have place for the IE */ 2781 /* 2782 * TODO: the 1 added is because this temporarily is under the EXTENSION 2783 * IE. Get rid of it when it moves. 2784 */ 2785 if (!he_cap) 2786 return orig_pos; 2787 2788 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2789 ie_len = 2 + 1 + 2790 sizeof(he_cap->he_cap_elem) + n + 2791 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2792 he_cap->he_cap_elem.phy_cap_info); 2793 2794 if ((end - pos) < ie_len) 2795 return orig_pos; 2796 2797 *pos++ = WLAN_EID_EXTENSION; 2798 pos++; /* We'll set the size later below */ 2799 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2800 2801 /* Fixed data */ 2802 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2803 pos += sizeof(he_cap->he_cap_elem); 2804 2805 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2806 pos += n; 2807 2808 /* Check if PPE Threshold should be present */ 2809 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2810 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2811 goto end; 2812 2813 /* 2814 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2815 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2816 */ 2817 n = hweight8(he_cap->ppe_thres[0] & 2818 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2819 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2820 IEEE80211_PPE_THRES_NSS_POS)); 2821 2822 /* 2823 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2824 * total size. 2825 */ 2826 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2827 n = DIV_ROUND_UP(n, 8); 2828 2829 /* Copy PPE Thresholds */ 2830 memcpy(pos, &he_cap->ppe_thres, n); 2831 pos += n; 2832 2833 end: 2834 orig_pos[1] = (pos - orig_pos) - 2; 2835 return pos; 2836 } 2837 2838 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2839 const struct cfg80211_chan_def *chandef, 2840 u16 prot_mode, bool rifs_mode) 2841 { 2842 struct ieee80211_ht_operation *ht_oper; 2843 /* Build HT Information */ 2844 *pos++ = WLAN_EID_HT_OPERATION; 2845 *pos++ = sizeof(struct ieee80211_ht_operation); 2846 ht_oper = (struct ieee80211_ht_operation *)pos; 2847 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2848 chandef->chan->center_freq); 2849 switch (chandef->width) { 2850 case NL80211_CHAN_WIDTH_160: 2851 case NL80211_CHAN_WIDTH_80P80: 2852 case NL80211_CHAN_WIDTH_80: 2853 case NL80211_CHAN_WIDTH_40: 2854 if (chandef->center_freq1 > chandef->chan->center_freq) 2855 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2856 else 2857 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2858 break; 2859 default: 2860 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2861 break; 2862 } 2863 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2864 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2865 chandef->width != NL80211_CHAN_WIDTH_20) 2866 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2867 2868 if (rifs_mode) 2869 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2870 2871 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2872 ht_oper->stbc_param = 0x0000; 2873 2874 /* It seems that Basic MCS set and Supported MCS set 2875 are identical for the first 10 bytes */ 2876 memset(&ht_oper->basic_set, 0, 16); 2877 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2878 2879 return pos + sizeof(struct ieee80211_ht_operation); 2880 } 2881 2882 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2883 const struct cfg80211_chan_def *chandef) 2884 { 2885 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2886 *pos++ = 3; /* IE length */ 2887 /* New channel width */ 2888 switch (chandef->width) { 2889 case NL80211_CHAN_WIDTH_80: 2890 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2891 break; 2892 case NL80211_CHAN_WIDTH_160: 2893 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2894 break; 2895 case NL80211_CHAN_WIDTH_80P80: 2896 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2897 break; 2898 default: 2899 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2900 } 2901 2902 /* new center frequency segment 0 */ 2903 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2904 /* new center frequency segment 1 */ 2905 if (chandef->center_freq2) 2906 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2907 else 2908 *pos++ = 0; 2909 } 2910 2911 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2912 const struct cfg80211_chan_def *chandef) 2913 { 2914 struct ieee80211_vht_operation *vht_oper; 2915 2916 *pos++ = WLAN_EID_VHT_OPERATION; 2917 *pos++ = sizeof(struct ieee80211_vht_operation); 2918 vht_oper = (struct ieee80211_vht_operation *)pos; 2919 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2920 chandef->center_freq1); 2921 if (chandef->center_freq2) 2922 vht_oper->center_freq_seg1_idx = 2923 ieee80211_frequency_to_channel(chandef->center_freq2); 2924 else 2925 vht_oper->center_freq_seg1_idx = 0x00; 2926 2927 switch (chandef->width) { 2928 case NL80211_CHAN_WIDTH_160: 2929 /* 2930 * Convert 160 MHz channel width to new style as interop 2931 * workaround. 2932 */ 2933 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2934 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2935 if (chandef->chan->center_freq < chandef->center_freq1) 2936 vht_oper->center_freq_seg0_idx -= 8; 2937 else 2938 vht_oper->center_freq_seg0_idx += 8; 2939 break; 2940 case NL80211_CHAN_WIDTH_80P80: 2941 /* 2942 * Convert 80+80 MHz channel width to new style as interop 2943 * workaround. 2944 */ 2945 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2946 break; 2947 case NL80211_CHAN_WIDTH_80: 2948 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2949 break; 2950 default: 2951 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2952 break; 2953 } 2954 2955 /* don't require special VHT peer rates */ 2956 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2957 2958 return pos + sizeof(struct ieee80211_vht_operation); 2959 } 2960 2961 u8 *ieee80211_ie_build_he_oper(u8 *pos) 2962 { 2963 struct ieee80211_he_operation *he_oper; 2964 u32 he_oper_params; 2965 2966 *pos++ = WLAN_EID_EXTENSION; 2967 *pos++ = 1 + sizeof(struct ieee80211_he_operation); 2968 *pos++ = WLAN_EID_EXT_HE_OPERATION; 2969 2970 he_oper_params = 0; 2971 he_oper_params |= u32_encode_bits(1023, /* disabled */ 2972 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 2973 he_oper_params |= u32_encode_bits(1, 2974 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 2975 he_oper_params |= u32_encode_bits(1, 2976 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 2977 2978 he_oper = (struct ieee80211_he_operation *)pos; 2979 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 2980 2981 /* don't require special HE peer rates */ 2982 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 2983 2984 /* TODO add VHT operational and 6GHz operational subelement? */ 2985 2986 return pos + sizeof(struct ieee80211_vht_operation); 2987 } 2988 2989 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2990 struct cfg80211_chan_def *chandef) 2991 { 2992 enum nl80211_channel_type channel_type; 2993 2994 if (!ht_oper) 2995 return false; 2996 2997 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2998 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2999 channel_type = NL80211_CHAN_HT20; 3000 break; 3001 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3002 channel_type = NL80211_CHAN_HT40PLUS; 3003 break; 3004 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3005 channel_type = NL80211_CHAN_HT40MINUS; 3006 break; 3007 default: 3008 channel_type = NL80211_CHAN_NO_HT; 3009 return false; 3010 } 3011 3012 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3013 return true; 3014 } 3015 3016 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, 3017 const struct ieee80211_vht_operation *oper, 3018 const struct ieee80211_ht_operation *htop, 3019 struct cfg80211_chan_def *chandef) 3020 { 3021 struct cfg80211_chan_def new = *chandef; 3022 int cf0, cf1; 3023 int ccfs0, ccfs1, ccfs2; 3024 int ccf0, ccf1; 3025 u32 vht_cap; 3026 bool support_80_80 = false; 3027 bool support_160 = false; 3028 3029 if (!oper || !htop) 3030 return false; 3031 3032 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3033 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3034 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3035 support_80_80 = ((vht_cap & 3036 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3037 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3038 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3039 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3040 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3041 ccfs0 = oper->center_freq_seg0_idx; 3042 ccfs1 = oper->center_freq_seg1_idx; 3043 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3044 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3045 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3046 3047 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */ 3048 ccf0 = ccfs0; 3049 ccf1 = ccfs1; 3050 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3051 ccf1 = ccfs2; 3052 3053 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3054 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3055 3056 switch (oper->chan_width) { 3057 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3058 /* just use HT information directly */ 3059 break; 3060 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3061 new.width = NL80211_CHAN_WIDTH_80; 3062 new.center_freq1 = cf0; 3063 /* If needed, adjust based on the newer interop workaround. */ 3064 if (ccf1) { 3065 unsigned int diff; 3066 3067 diff = abs(ccf1 - ccf0); 3068 if ((diff == 8) && support_160) { 3069 new.width = NL80211_CHAN_WIDTH_160; 3070 new.center_freq1 = cf1; 3071 } else if ((diff > 8) && support_80_80) { 3072 new.width = NL80211_CHAN_WIDTH_80P80; 3073 new.center_freq2 = cf1; 3074 } 3075 } 3076 break; 3077 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3078 /* deprecated encoding */ 3079 new.width = NL80211_CHAN_WIDTH_160; 3080 new.center_freq1 = cf0; 3081 break; 3082 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3083 /* deprecated encoding */ 3084 new.width = NL80211_CHAN_WIDTH_80P80; 3085 new.center_freq1 = cf0; 3086 new.center_freq2 = cf1; 3087 break; 3088 default: 3089 return false; 3090 } 3091 3092 if (!cfg80211_chandef_valid(&new)) 3093 return false; 3094 3095 *chandef = new; 3096 return true; 3097 } 3098 3099 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 3100 const struct ieee80211_supported_band *sband, 3101 const u8 *srates, int srates_len, u32 *rates) 3102 { 3103 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 3104 int shift = ieee80211_chandef_get_shift(chandef); 3105 struct ieee80211_rate *br; 3106 int brate, rate, i, j, count = 0; 3107 3108 *rates = 0; 3109 3110 for (i = 0; i < srates_len; i++) { 3111 rate = srates[i] & 0x7f; 3112 3113 for (j = 0; j < sband->n_bitrates; j++) { 3114 br = &sband->bitrates[j]; 3115 if ((rate_flags & br->flags) != rate_flags) 3116 continue; 3117 3118 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3119 if (brate == rate) { 3120 *rates |= BIT(j); 3121 count++; 3122 break; 3123 } 3124 } 3125 } 3126 return count; 3127 } 3128 3129 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3130 struct sk_buff *skb, bool need_basic, 3131 enum nl80211_band band) 3132 { 3133 struct ieee80211_local *local = sdata->local; 3134 struct ieee80211_supported_band *sband; 3135 int rate, shift; 3136 u8 i, rates, *pos; 3137 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3138 u32 rate_flags; 3139 3140 shift = ieee80211_vif_get_shift(&sdata->vif); 3141 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3142 sband = local->hw.wiphy->bands[band]; 3143 rates = 0; 3144 for (i = 0; i < sband->n_bitrates; i++) { 3145 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3146 continue; 3147 rates++; 3148 } 3149 if (rates > 8) 3150 rates = 8; 3151 3152 if (skb_tailroom(skb) < rates + 2) 3153 return -ENOMEM; 3154 3155 pos = skb_put(skb, rates + 2); 3156 *pos++ = WLAN_EID_SUPP_RATES; 3157 *pos++ = rates; 3158 for (i = 0; i < rates; i++) { 3159 u8 basic = 0; 3160 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3161 continue; 3162 3163 if (need_basic && basic_rates & BIT(i)) 3164 basic = 0x80; 3165 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3166 5 * (1 << shift)); 3167 *pos++ = basic | (u8) rate; 3168 } 3169 3170 return 0; 3171 } 3172 3173 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3174 struct sk_buff *skb, bool need_basic, 3175 enum nl80211_band band) 3176 { 3177 struct ieee80211_local *local = sdata->local; 3178 struct ieee80211_supported_band *sband; 3179 int rate, shift; 3180 u8 i, exrates, *pos; 3181 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3182 u32 rate_flags; 3183 3184 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3185 shift = ieee80211_vif_get_shift(&sdata->vif); 3186 3187 sband = local->hw.wiphy->bands[band]; 3188 exrates = 0; 3189 for (i = 0; i < sband->n_bitrates; i++) { 3190 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3191 continue; 3192 exrates++; 3193 } 3194 3195 if (exrates > 8) 3196 exrates -= 8; 3197 else 3198 exrates = 0; 3199 3200 if (skb_tailroom(skb) < exrates + 2) 3201 return -ENOMEM; 3202 3203 if (exrates) { 3204 pos = skb_put(skb, exrates + 2); 3205 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3206 *pos++ = exrates; 3207 for (i = 8; i < sband->n_bitrates; i++) { 3208 u8 basic = 0; 3209 if ((rate_flags & sband->bitrates[i].flags) 3210 != rate_flags) 3211 continue; 3212 if (need_basic && basic_rates & BIT(i)) 3213 basic = 0x80; 3214 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3215 5 * (1 << shift)); 3216 *pos++ = basic | (u8) rate; 3217 } 3218 } 3219 return 0; 3220 } 3221 3222 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3223 { 3224 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3226 3227 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 3228 /* non-managed type inferfaces */ 3229 return 0; 3230 } 3231 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3232 } 3233 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3234 3235 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3236 { 3237 if (!mcs) 3238 return 1; 3239 3240 /* TODO: consider rx_highest */ 3241 3242 if (mcs->rx_mask[3]) 3243 return 4; 3244 if (mcs->rx_mask[2]) 3245 return 3; 3246 if (mcs->rx_mask[1]) 3247 return 2; 3248 return 1; 3249 } 3250 3251 /** 3252 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3253 * @local: mac80211 hw info struct 3254 * @status: RX status 3255 * @mpdu_len: total MPDU length (including FCS) 3256 * @mpdu_offset: offset into MPDU to calculate timestamp at 3257 * 3258 * This function calculates the RX timestamp at the given MPDU offset, taking 3259 * into account what the RX timestamp was. An offset of 0 will just normalize 3260 * the timestamp to TSF at beginning of MPDU reception. 3261 */ 3262 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3263 struct ieee80211_rx_status *status, 3264 unsigned int mpdu_len, 3265 unsigned int mpdu_offset) 3266 { 3267 u64 ts = status->mactime; 3268 struct rate_info ri; 3269 u16 rate; 3270 3271 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3272 return 0; 3273 3274 memset(&ri, 0, sizeof(ri)); 3275 3276 ri.bw = status->bw; 3277 3278 /* Fill cfg80211 rate info */ 3279 switch (status->encoding) { 3280 case RX_ENC_HT: 3281 ri.mcs = status->rate_idx; 3282 ri.flags |= RATE_INFO_FLAGS_MCS; 3283 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3284 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3285 break; 3286 case RX_ENC_VHT: 3287 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3288 ri.mcs = status->rate_idx; 3289 ri.nss = status->nss; 3290 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3291 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3292 break; 3293 default: 3294 WARN_ON(1); 3295 /* fall through */ 3296 case RX_ENC_LEGACY: { 3297 struct ieee80211_supported_band *sband; 3298 int shift = 0; 3299 int bitrate; 3300 3301 switch (status->bw) { 3302 case RATE_INFO_BW_10: 3303 shift = 1; 3304 break; 3305 case RATE_INFO_BW_5: 3306 shift = 2; 3307 break; 3308 } 3309 3310 sband = local->hw.wiphy->bands[status->band]; 3311 bitrate = sband->bitrates[status->rate_idx].bitrate; 3312 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 3313 3314 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3315 /* TODO: handle HT/VHT preambles */ 3316 if (status->band == NL80211_BAND_5GHZ) { 3317 ts += 20 << shift; 3318 mpdu_offset += 2; 3319 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3320 ts += 96; 3321 } else { 3322 ts += 192; 3323 } 3324 } 3325 break; 3326 } 3327 } 3328 3329 rate = cfg80211_calculate_bitrate(&ri); 3330 if (WARN_ONCE(!rate, 3331 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3332 (unsigned long long)status->flag, status->rate_idx, 3333 status->nss)) 3334 return 0; 3335 3336 /* rewind from end of MPDU */ 3337 if (status->flag & RX_FLAG_MACTIME_END) 3338 ts -= mpdu_len * 8 * 10 / rate; 3339 3340 ts += mpdu_offset * 8 * 10 / rate; 3341 3342 return ts; 3343 } 3344 3345 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 3346 { 3347 struct ieee80211_sub_if_data *sdata; 3348 struct cfg80211_chan_def chandef; 3349 3350 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 3351 ASSERT_RTNL(); 3352 3353 mutex_lock(&local->mtx); 3354 list_for_each_entry(sdata, &local->interfaces, list) { 3355 /* it might be waiting for the local->mtx, but then 3356 * by the time it gets it, sdata->wdev.cac_started 3357 * will no longer be true 3358 */ 3359 cancel_delayed_work(&sdata->dfs_cac_timer_work); 3360 3361 if (sdata->wdev.cac_started) { 3362 chandef = sdata->vif.bss_conf.chandef; 3363 ieee80211_vif_release_channel(sdata); 3364 cfg80211_cac_event(sdata->dev, 3365 &chandef, 3366 NL80211_RADAR_CAC_ABORTED, 3367 GFP_KERNEL); 3368 } 3369 } 3370 mutex_unlock(&local->mtx); 3371 } 3372 3373 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 3374 { 3375 struct ieee80211_local *local = 3376 container_of(work, struct ieee80211_local, radar_detected_work); 3377 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 3378 struct ieee80211_chanctx *ctx; 3379 int num_chanctx = 0; 3380 3381 mutex_lock(&local->chanctx_mtx); 3382 list_for_each_entry(ctx, &local->chanctx_list, list) { 3383 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3384 continue; 3385 3386 num_chanctx++; 3387 chandef = ctx->conf.def; 3388 } 3389 mutex_unlock(&local->chanctx_mtx); 3390 3391 rtnl_lock(); 3392 ieee80211_dfs_cac_cancel(local); 3393 rtnl_unlock(); 3394 3395 if (num_chanctx > 1) 3396 /* XXX: multi-channel is not supported yet */ 3397 WARN_ON(1); 3398 else 3399 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3400 } 3401 3402 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3403 { 3404 struct ieee80211_local *local = hw_to_local(hw); 3405 3406 trace_api_radar_detected(local); 3407 3408 schedule_work(&local->radar_detected_work); 3409 } 3410 EXPORT_SYMBOL(ieee80211_radar_detected); 3411 3412 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3413 { 3414 u32 ret; 3415 int tmp; 3416 3417 switch (c->width) { 3418 case NL80211_CHAN_WIDTH_20: 3419 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3420 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3421 break; 3422 case NL80211_CHAN_WIDTH_40: 3423 c->width = NL80211_CHAN_WIDTH_20; 3424 c->center_freq1 = c->chan->center_freq; 3425 ret = IEEE80211_STA_DISABLE_40MHZ | 3426 IEEE80211_STA_DISABLE_VHT; 3427 break; 3428 case NL80211_CHAN_WIDTH_80: 3429 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3430 /* n_P40 */ 3431 tmp /= 2; 3432 /* freq_P40 */ 3433 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3434 c->width = NL80211_CHAN_WIDTH_40; 3435 ret = IEEE80211_STA_DISABLE_VHT; 3436 break; 3437 case NL80211_CHAN_WIDTH_80P80: 3438 c->center_freq2 = 0; 3439 c->width = NL80211_CHAN_WIDTH_80; 3440 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3441 IEEE80211_STA_DISABLE_160MHZ; 3442 break; 3443 case NL80211_CHAN_WIDTH_160: 3444 /* n_P20 */ 3445 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3446 /* n_P80 */ 3447 tmp /= 4; 3448 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3449 c->width = NL80211_CHAN_WIDTH_80; 3450 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3451 IEEE80211_STA_DISABLE_160MHZ; 3452 break; 3453 default: 3454 case NL80211_CHAN_WIDTH_20_NOHT: 3455 WARN_ON_ONCE(1); 3456 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3457 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3458 break; 3459 case NL80211_CHAN_WIDTH_5: 3460 case NL80211_CHAN_WIDTH_10: 3461 WARN_ON_ONCE(1); 3462 /* keep c->width */ 3463 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3464 break; 3465 } 3466 3467 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3468 3469 return ret; 3470 } 3471 3472 /* 3473 * Returns true if smps_mode_new is strictly more restrictive than 3474 * smps_mode_old. 3475 */ 3476 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 3477 enum ieee80211_smps_mode smps_mode_new) 3478 { 3479 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 3480 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 3481 return false; 3482 3483 switch (smps_mode_old) { 3484 case IEEE80211_SMPS_STATIC: 3485 return false; 3486 case IEEE80211_SMPS_DYNAMIC: 3487 return smps_mode_new == IEEE80211_SMPS_STATIC; 3488 case IEEE80211_SMPS_OFF: 3489 return smps_mode_new != IEEE80211_SMPS_OFF; 3490 default: 3491 WARN_ON(1); 3492 } 3493 3494 return false; 3495 } 3496 3497 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3498 struct cfg80211_csa_settings *csa_settings) 3499 { 3500 struct sk_buff *skb; 3501 struct ieee80211_mgmt *mgmt; 3502 struct ieee80211_local *local = sdata->local; 3503 int freq; 3504 int hdr_len = offsetofend(struct ieee80211_mgmt, 3505 u.action.u.chan_switch); 3506 u8 *pos; 3507 3508 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3509 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3510 return -EOPNOTSUPP; 3511 3512 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3513 5 + /* channel switch announcement element */ 3514 3 + /* secondary channel offset element */ 3515 5 + /* wide bandwidth channel switch announcement */ 3516 8); /* mesh channel switch parameters element */ 3517 if (!skb) 3518 return -ENOMEM; 3519 3520 skb_reserve(skb, local->tx_headroom); 3521 mgmt = skb_put_zero(skb, hdr_len); 3522 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3523 IEEE80211_STYPE_ACTION); 3524 3525 eth_broadcast_addr(mgmt->da); 3526 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3527 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3528 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3529 } else { 3530 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3531 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3532 } 3533 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3534 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3535 pos = skb_put(skb, 5); 3536 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3537 *pos++ = 3; /* IE length */ 3538 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3539 freq = csa_settings->chandef.chan->center_freq; 3540 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3541 *pos++ = csa_settings->count; /* count */ 3542 3543 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3544 enum nl80211_channel_type ch_type; 3545 3546 skb_put(skb, 3); 3547 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3548 *pos++ = 1; /* IE length */ 3549 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3550 if (ch_type == NL80211_CHAN_HT40PLUS) 3551 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3552 else 3553 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3554 } 3555 3556 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3557 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3558 3559 skb_put(skb, 8); 3560 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3561 *pos++ = 6; /* IE length */ 3562 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3563 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3564 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3565 *pos++ |= csa_settings->block_tx ? 3566 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3567 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3568 pos += 2; 3569 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3570 pos += 2; 3571 } 3572 3573 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3574 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3575 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3576 skb_put(skb, 5); 3577 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3578 } 3579 3580 ieee80211_tx_skb(sdata, skb); 3581 return 0; 3582 } 3583 3584 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3585 { 3586 return !(cs == NULL || cs->cipher == 0 || 3587 cs->hdr_len < cs->pn_len + cs->pn_off || 3588 cs->hdr_len <= cs->key_idx_off || 3589 cs->key_idx_shift > 7 || 3590 cs->key_idx_mask == 0); 3591 } 3592 3593 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3594 { 3595 int i; 3596 3597 /* Ensure we have enough iftype bitmap space for all iftype values */ 3598 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3599 3600 for (i = 0; i < n; i++) 3601 if (!ieee80211_cs_valid(&cs[i])) 3602 return false; 3603 3604 return true; 3605 } 3606 3607 const struct ieee80211_cipher_scheme * 3608 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3609 enum nl80211_iftype iftype) 3610 { 3611 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3612 int n = local->hw.n_cipher_schemes; 3613 int i; 3614 const struct ieee80211_cipher_scheme *cs = NULL; 3615 3616 for (i = 0; i < n; i++) { 3617 if (l[i].cipher == cipher) { 3618 cs = &l[i]; 3619 break; 3620 } 3621 } 3622 3623 if (!cs || !(cs->iftype & BIT(iftype))) 3624 return NULL; 3625 3626 return cs; 3627 } 3628 3629 int ieee80211_cs_headroom(struct ieee80211_local *local, 3630 struct cfg80211_crypto_settings *crypto, 3631 enum nl80211_iftype iftype) 3632 { 3633 const struct ieee80211_cipher_scheme *cs; 3634 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3635 int i; 3636 3637 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3638 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3639 iftype); 3640 3641 if (cs && headroom < cs->hdr_len) 3642 headroom = cs->hdr_len; 3643 } 3644 3645 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3646 if (cs && headroom < cs->hdr_len) 3647 headroom = cs->hdr_len; 3648 3649 return headroom; 3650 } 3651 3652 static bool 3653 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3654 { 3655 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3656 int skip; 3657 3658 if (end > 0) 3659 return false; 3660 3661 /* One shot NOA */ 3662 if (data->count[i] == 1) 3663 return false; 3664 3665 if (data->desc[i].interval == 0) 3666 return false; 3667 3668 /* End time is in the past, check for repetitions */ 3669 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3670 if (data->count[i] < 255) { 3671 if (data->count[i] <= skip) { 3672 data->count[i] = 0; 3673 return false; 3674 } 3675 3676 data->count[i] -= skip; 3677 } 3678 3679 data->desc[i].start += skip * data->desc[i].interval; 3680 3681 return true; 3682 } 3683 3684 static bool 3685 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3686 s32 *offset) 3687 { 3688 bool ret = false; 3689 int i; 3690 3691 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3692 s32 cur; 3693 3694 if (!data->count[i]) 3695 continue; 3696 3697 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3698 ret = true; 3699 3700 cur = data->desc[i].start - tsf; 3701 if (cur > *offset) 3702 continue; 3703 3704 cur = data->desc[i].start + data->desc[i].duration - tsf; 3705 if (cur > *offset) 3706 *offset = cur; 3707 } 3708 3709 return ret; 3710 } 3711 3712 static u32 3713 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3714 { 3715 s32 offset = 0; 3716 int tries = 0; 3717 /* 3718 * arbitrary limit, used to avoid infinite loops when combined NoA 3719 * descriptors cover the full time period. 3720 */ 3721 int max_tries = 5; 3722 3723 ieee80211_extend_absent_time(data, tsf, &offset); 3724 do { 3725 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3726 break; 3727 3728 tries++; 3729 } while (tries < max_tries); 3730 3731 return offset; 3732 } 3733 3734 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3735 { 3736 u32 next_offset = BIT(31) - 1; 3737 int i; 3738 3739 data->absent = 0; 3740 data->has_next_tsf = false; 3741 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3742 s32 start; 3743 3744 if (!data->count[i]) 3745 continue; 3746 3747 ieee80211_extend_noa_desc(data, tsf, i); 3748 start = data->desc[i].start - tsf; 3749 if (start <= 0) 3750 data->absent |= BIT(i); 3751 3752 if (next_offset > start) 3753 next_offset = start; 3754 3755 data->has_next_tsf = true; 3756 } 3757 3758 if (data->absent) 3759 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3760 3761 data->next_tsf = tsf + next_offset; 3762 } 3763 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3764 3765 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3766 struct ieee80211_noa_data *data, u32 tsf) 3767 { 3768 int ret = 0; 3769 int i; 3770 3771 memset(data, 0, sizeof(*data)); 3772 3773 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3774 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3775 3776 if (!desc->count || !desc->duration) 3777 continue; 3778 3779 data->count[i] = desc->count; 3780 data->desc[i].start = le32_to_cpu(desc->start_time); 3781 data->desc[i].duration = le32_to_cpu(desc->duration); 3782 data->desc[i].interval = le32_to_cpu(desc->interval); 3783 3784 if (data->count[i] > 1 && 3785 data->desc[i].interval < data->desc[i].duration) 3786 continue; 3787 3788 ieee80211_extend_noa_desc(data, tsf, i); 3789 ret++; 3790 } 3791 3792 if (ret) 3793 ieee80211_update_p2p_noa(data, tsf); 3794 3795 return ret; 3796 } 3797 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3798 3799 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3800 struct ieee80211_sub_if_data *sdata) 3801 { 3802 u64 tsf = drv_get_tsf(local, sdata); 3803 u64 dtim_count = 0; 3804 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3805 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3806 struct ps_data *ps; 3807 u8 bcns_from_dtim; 3808 3809 if (tsf == -1ULL || !beacon_int || !dtim_period) 3810 return; 3811 3812 if (sdata->vif.type == NL80211_IFTYPE_AP || 3813 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3814 if (!sdata->bss) 3815 return; 3816 3817 ps = &sdata->bss->ps; 3818 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3819 ps = &sdata->u.mesh.ps; 3820 } else { 3821 return; 3822 } 3823 3824 /* 3825 * actually finds last dtim_count, mac80211 will update in 3826 * __beacon_add_tim(). 3827 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3828 */ 3829 do_div(tsf, beacon_int); 3830 bcns_from_dtim = do_div(tsf, dtim_period); 3831 /* just had a DTIM */ 3832 if (!bcns_from_dtim) 3833 dtim_count = 0; 3834 else 3835 dtim_count = dtim_period - bcns_from_dtim; 3836 3837 ps->dtim_count = dtim_count; 3838 } 3839 3840 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3841 struct ieee80211_chanctx *ctx) 3842 { 3843 struct ieee80211_sub_if_data *sdata; 3844 u8 radar_detect = 0; 3845 3846 lockdep_assert_held(&local->chanctx_mtx); 3847 3848 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3849 return 0; 3850 3851 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3852 if (sdata->reserved_radar_required) 3853 radar_detect |= BIT(sdata->reserved_chandef.width); 3854 3855 /* 3856 * An in-place reservation context should not have any assigned vifs 3857 * until it replaces the other context. 3858 */ 3859 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3860 !list_empty(&ctx->assigned_vifs)); 3861 3862 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3863 if (sdata->radar_required) 3864 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3865 3866 return radar_detect; 3867 } 3868 3869 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3870 const struct cfg80211_chan_def *chandef, 3871 enum ieee80211_chanctx_mode chanmode, 3872 u8 radar_detect) 3873 { 3874 struct ieee80211_local *local = sdata->local; 3875 struct ieee80211_sub_if_data *sdata_iter; 3876 enum nl80211_iftype iftype = sdata->wdev.iftype; 3877 struct ieee80211_chanctx *ctx; 3878 int total = 1; 3879 struct iface_combination_params params = { 3880 .radar_detect = radar_detect, 3881 }; 3882 3883 lockdep_assert_held(&local->chanctx_mtx); 3884 3885 if (WARN_ON(hweight32(radar_detect) > 1)) 3886 return -EINVAL; 3887 3888 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3889 !chandef->chan)) 3890 return -EINVAL; 3891 3892 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3893 return -EINVAL; 3894 3895 if (sdata->vif.type == NL80211_IFTYPE_AP || 3896 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3897 /* 3898 * always passing this is harmless, since it'll be the 3899 * same value that cfg80211 finds if it finds the same 3900 * interface ... and that's always allowed 3901 */ 3902 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3903 } 3904 3905 /* Always allow software iftypes */ 3906 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 3907 if (radar_detect) 3908 return -EINVAL; 3909 return 0; 3910 } 3911 3912 if (chandef) 3913 params.num_different_channels = 1; 3914 3915 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3916 params.iftype_num[iftype] = 1; 3917 3918 list_for_each_entry(ctx, &local->chanctx_list, list) { 3919 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3920 continue; 3921 params.radar_detect |= 3922 ieee80211_chanctx_radar_detect(local, ctx); 3923 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3924 params.num_different_channels++; 3925 continue; 3926 } 3927 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3928 cfg80211_chandef_compatible(chandef, 3929 &ctx->conf.def)) 3930 continue; 3931 params.num_different_channels++; 3932 } 3933 3934 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3935 struct wireless_dev *wdev_iter; 3936 3937 wdev_iter = &sdata_iter->wdev; 3938 3939 if (sdata_iter == sdata || 3940 !ieee80211_sdata_running(sdata_iter) || 3941 cfg80211_iftype_allowed(local->hw.wiphy, 3942 wdev_iter->iftype, 0, 1)) 3943 continue; 3944 3945 params.iftype_num[wdev_iter->iftype]++; 3946 total++; 3947 } 3948 3949 if (total == 1 && !params.radar_detect) 3950 return 0; 3951 3952 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3953 } 3954 3955 static void 3956 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3957 void *data) 3958 { 3959 u32 *max_num_different_channels = data; 3960 3961 *max_num_different_channels = max(*max_num_different_channels, 3962 c->num_different_channels); 3963 } 3964 3965 int ieee80211_max_num_channels(struct ieee80211_local *local) 3966 { 3967 struct ieee80211_sub_if_data *sdata; 3968 struct ieee80211_chanctx *ctx; 3969 u32 max_num_different_channels = 1; 3970 int err; 3971 struct iface_combination_params params = {0}; 3972 3973 lockdep_assert_held(&local->chanctx_mtx); 3974 3975 list_for_each_entry(ctx, &local->chanctx_list, list) { 3976 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3977 continue; 3978 3979 params.num_different_channels++; 3980 3981 params.radar_detect |= 3982 ieee80211_chanctx_radar_detect(local, ctx); 3983 } 3984 3985 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3986 params.iftype_num[sdata->wdev.iftype]++; 3987 3988 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3989 ieee80211_iter_max_chans, 3990 &max_num_different_channels); 3991 if (err < 0) 3992 return err; 3993 3994 return max_num_different_channels; 3995 } 3996 3997 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3998 { 3999 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4000 *buf++ = 7; /* len */ 4001 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4002 *buf++ = 0x50; 4003 *buf++ = 0xf2; 4004 *buf++ = 2; /* WME */ 4005 *buf++ = 0; /* WME info */ 4006 *buf++ = 1; /* WME ver */ 4007 *buf++ = qosinfo; /* U-APSD no in use */ 4008 4009 return buf; 4010 } 4011 4012 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4013 unsigned long *frame_cnt, 4014 unsigned long *byte_cnt) 4015 { 4016 struct txq_info *txqi = to_txq_info(txq); 4017 u32 frag_cnt = 0, frag_bytes = 0; 4018 struct sk_buff *skb; 4019 4020 skb_queue_walk(&txqi->frags, skb) { 4021 frag_cnt++; 4022 frag_bytes += skb->len; 4023 } 4024 4025 if (frame_cnt) 4026 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4027 4028 if (byte_cnt) 4029 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4030 } 4031 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4032 4033 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4034 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4035 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4036 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4037 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4038 }; 4039