1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2015-2017 Intel Deutschland GmbH 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * utilities for mac80211 14 */ 15 16 #include <net/mac80211.h> 17 #include <linux/netdevice.h> 18 #include <linux/export.h> 19 #include <linux/types.h> 20 #include <linux/slab.h> 21 #include <linux/skbuff.h> 22 #include <linux/etherdevice.h> 23 #include <linux/if_arp.h> 24 #include <linux/bitmap.h> 25 #include <linux/crc32.h> 26 #include <net/net_namespace.h> 27 #include <net/cfg80211.h> 28 #include <net/rtnetlink.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "mesh.h" 34 #include "wme.h" 35 #include "led.h" 36 #include "wep.h" 37 38 /* privid for wiphys to determine whether they belong to us or not */ 39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 40 41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 42 { 43 struct ieee80211_local *local; 44 BUG_ON(!wiphy); 45 46 local = wiphy_priv(wiphy); 47 return &local->hw; 48 } 49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 50 51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 52 { 53 struct sk_buff *skb; 54 struct ieee80211_hdr *hdr; 55 56 skb_queue_walk(&tx->skbs, skb) { 57 hdr = (struct ieee80211_hdr *) skb->data; 58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 59 } 60 } 61 62 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 63 int rate, int erp, int short_preamble, 64 int shift) 65 { 66 int dur; 67 68 /* calculate duration (in microseconds, rounded up to next higher 69 * integer if it includes a fractional microsecond) to send frame of 70 * len bytes (does not include FCS) at the given rate. Duration will 71 * also include SIFS. 72 * 73 * rate is in 100 kbps, so divident is multiplied by 10 in the 74 * DIV_ROUND_UP() operations. 75 * 76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 77 * is assumed to be 0 otherwise. 78 */ 79 80 if (band == NL80211_BAND_5GHZ || erp) { 81 /* 82 * OFDM: 83 * 84 * N_DBPS = DATARATE x 4 85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 86 * (16 = SIGNAL time, 6 = tail bits) 87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 88 * 89 * T_SYM = 4 usec 90 * 802.11a - 18.5.2: aSIFSTime = 16 usec 91 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 92 * signal ext = 6 usec 93 */ 94 dur = 16; /* SIFS + signal ext */ 95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 97 98 /* IEEE 802.11-2012 18.3.2.4: all values above are: 99 * * times 4 for 5 MHz 100 * * times 2 for 10 MHz 101 */ 102 dur *= 1 << shift; 103 104 /* rates should already consider the channel bandwidth, 105 * don't apply divisor again. 106 */ 107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 108 4 * rate); /* T_SYM x N_SYM */ 109 } else { 110 /* 111 * 802.11b or 802.11g with 802.11b compatibility: 112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 114 * 115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 116 * aSIFSTime = 10 usec 117 * aPreambleLength = 144 usec or 72 usec with short preamble 118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 119 */ 120 dur = 10; /* aSIFSTime = 10 usec */ 121 dur += short_preamble ? (72 + 24) : (144 + 48); 122 123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 124 } 125 126 return dur; 127 } 128 129 /* Exported duration function for driver use */ 130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 131 struct ieee80211_vif *vif, 132 enum nl80211_band band, 133 size_t frame_len, 134 struct ieee80211_rate *rate) 135 { 136 struct ieee80211_sub_if_data *sdata; 137 u16 dur; 138 int erp, shift = 0; 139 bool short_preamble = false; 140 141 erp = 0; 142 if (vif) { 143 sdata = vif_to_sdata(vif); 144 short_preamble = sdata->vif.bss_conf.use_short_preamble; 145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 146 erp = rate->flags & IEEE80211_RATE_ERP_G; 147 shift = ieee80211_vif_get_shift(vif); 148 } 149 150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 151 short_preamble, shift); 152 153 return cpu_to_le16(dur); 154 } 155 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 156 157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 158 struct ieee80211_vif *vif, size_t frame_len, 159 const struct ieee80211_tx_info *frame_txctl) 160 { 161 struct ieee80211_local *local = hw_to_local(hw); 162 struct ieee80211_rate *rate; 163 struct ieee80211_sub_if_data *sdata; 164 bool short_preamble; 165 int erp, shift = 0, bitrate; 166 u16 dur; 167 struct ieee80211_supported_band *sband; 168 169 sband = local->hw.wiphy->bands[frame_txctl->band]; 170 171 short_preamble = false; 172 173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 174 175 erp = 0; 176 if (vif) { 177 sdata = vif_to_sdata(vif); 178 short_preamble = sdata->vif.bss_conf.use_short_preamble; 179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 180 erp = rate->flags & IEEE80211_RATE_ERP_G; 181 shift = ieee80211_vif_get_shift(vif); 182 } 183 184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 185 186 /* CTS duration */ 187 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 188 erp, short_preamble, shift); 189 /* Data frame duration */ 190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 191 erp, short_preamble, shift); 192 /* ACK duration */ 193 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 194 erp, short_preamble, shift); 195 196 return cpu_to_le16(dur); 197 } 198 EXPORT_SYMBOL(ieee80211_rts_duration); 199 200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 201 struct ieee80211_vif *vif, 202 size_t frame_len, 203 const struct ieee80211_tx_info *frame_txctl) 204 { 205 struct ieee80211_local *local = hw_to_local(hw); 206 struct ieee80211_rate *rate; 207 struct ieee80211_sub_if_data *sdata; 208 bool short_preamble; 209 int erp, shift = 0, bitrate; 210 u16 dur; 211 struct ieee80211_supported_band *sband; 212 213 sband = local->hw.wiphy->bands[frame_txctl->band]; 214 215 short_preamble = false; 216 217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 218 erp = 0; 219 if (vif) { 220 sdata = vif_to_sdata(vif); 221 short_preamble = sdata->vif.bss_conf.use_short_preamble; 222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 223 erp = rate->flags & IEEE80211_RATE_ERP_G; 224 shift = ieee80211_vif_get_shift(vif); 225 } 226 227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 228 229 /* Data frame duration */ 230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 231 erp, short_preamble, shift); 232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 233 /* ACK duration */ 234 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 235 erp, short_preamble, shift); 236 } 237 238 return cpu_to_le16(dur); 239 } 240 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 241 242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 243 { 244 struct ieee80211_sub_if_data *sdata; 245 int n_acs = IEEE80211_NUM_ACS; 246 247 if (local->ops->wake_tx_queue) 248 return; 249 250 if (local->hw.queues < IEEE80211_NUM_ACS) 251 n_acs = 1; 252 253 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 254 int ac; 255 256 if (!sdata->dev) 257 continue; 258 259 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 260 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 261 continue; 262 263 for (ac = 0; ac < n_acs; ac++) { 264 int ac_queue = sdata->vif.hw_queue[ac]; 265 266 if (ac_queue == queue || 267 (sdata->vif.cab_queue == queue && 268 local->queue_stop_reasons[ac_queue] == 0 && 269 skb_queue_empty(&local->pending[ac_queue]))) 270 netif_wake_subqueue(sdata->dev, ac); 271 } 272 } 273 } 274 275 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 276 enum queue_stop_reason reason, 277 bool refcounted) 278 { 279 struct ieee80211_local *local = hw_to_local(hw); 280 281 trace_wake_queue(local, queue, reason); 282 283 if (WARN_ON(queue >= hw->queues)) 284 return; 285 286 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 287 return; 288 289 if (!refcounted) { 290 local->q_stop_reasons[queue][reason] = 0; 291 } else { 292 local->q_stop_reasons[queue][reason]--; 293 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 294 local->q_stop_reasons[queue][reason] = 0; 295 } 296 297 if (local->q_stop_reasons[queue][reason] == 0) 298 __clear_bit(reason, &local->queue_stop_reasons[queue]); 299 300 if (local->queue_stop_reasons[queue] != 0) 301 /* someone still has this queue stopped */ 302 return; 303 304 if (skb_queue_empty(&local->pending[queue])) { 305 rcu_read_lock(); 306 ieee80211_propagate_queue_wake(local, queue); 307 rcu_read_unlock(); 308 } else 309 tasklet_schedule(&local->tx_pending_tasklet); 310 } 311 312 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 313 enum queue_stop_reason reason, 314 bool refcounted) 315 { 316 struct ieee80211_local *local = hw_to_local(hw); 317 unsigned long flags; 318 319 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 320 __ieee80211_wake_queue(hw, queue, reason, refcounted); 321 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 322 } 323 324 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 325 { 326 ieee80211_wake_queue_by_reason(hw, queue, 327 IEEE80211_QUEUE_STOP_REASON_DRIVER, 328 false); 329 } 330 EXPORT_SYMBOL(ieee80211_wake_queue); 331 332 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 333 enum queue_stop_reason reason, 334 bool refcounted) 335 { 336 struct ieee80211_local *local = hw_to_local(hw); 337 struct ieee80211_sub_if_data *sdata; 338 int n_acs = IEEE80211_NUM_ACS; 339 340 trace_stop_queue(local, queue, reason); 341 342 if (WARN_ON(queue >= hw->queues)) 343 return; 344 345 if (!refcounted) 346 local->q_stop_reasons[queue][reason] = 1; 347 else 348 local->q_stop_reasons[queue][reason]++; 349 350 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 351 return; 352 353 if (local->ops->wake_tx_queue) 354 return; 355 356 if (local->hw.queues < IEEE80211_NUM_ACS) 357 n_acs = 1; 358 359 rcu_read_lock(); 360 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 361 int ac; 362 363 if (!sdata->dev) 364 continue; 365 366 for (ac = 0; ac < n_acs; ac++) { 367 if (sdata->vif.hw_queue[ac] == queue || 368 sdata->vif.cab_queue == queue) 369 netif_stop_subqueue(sdata->dev, ac); 370 } 371 } 372 rcu_read_unlock(); 373 } 374 375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 376 enum queue_stop_reason reason, 377 bool refcounted) 378 { 379 struct ieee80211_local *local = hw_to_local(hw); 380 unsigned long flags; 381 382 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 383 __ieee80211_stop_queue(hw, queue, reason, refcounted); 384 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 385 } 386 387 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 388 { 389 ieee80211_stop_queue_by_reason(hw, queue, 390 IEEE80211_QUEUE_STOP_REASON_DRIVER, 391 false); 392 } 393 EXPORT_SYMBOL(ieee80211_stop_queue); 394 395 void ieee80211_add_pending_skb(struct ieee80211_local *local, 396 struct sk_buff *skb) 397 { 398 struct ieee80211_hw *hw = &local->hw; 399 unsigned long flags; 400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 401 int queue = info->hw_queue; 402 403 if (WARN_ON(!info->control.vif)) { 404 ieee80211_free_txskb(&local->hw, skb); 405 return; 406 } 407 408 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 409 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 410 false); 411 __skb_queue_tail(&local->pending[queue], skb); 412 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 413 false); 414 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 415 } 416 417 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 418 struct sk_buff_head *skbs) 419 { 420 struct ieee80211_hw *hw = &local->hw; 421 struct sk_buff *skb; 422 unsigned long flags; 423 int queue, i; 424 425 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 426 while ((skb = skb_dequeue(skbs))) { 427 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 428 429 if (WARN_ON(!info->control.vif)) { 430 ieee80211_free_txskb(&local->hw, skb); 431 continue; 432 } 433 434 queue = info->hw_queue; 435 436 __ieee80211_stop_queue(hw, queue, 437 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 438 false); 439 440 __skb_queue_tail(&local->pending[queue], skb); 441 } 442 443 for (i = 0; i < hw->queues; i++) 444 __ieee80211_wake_queue(hw, i, 445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 446 false); 447 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 448 } 449 450 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 451 unsigned long queues, 452 enum queue_stop_reason reason, 453 bool refcounted) 454 { 455 struct ieee80211_local *local = hw_to_local(hw); 456 unsigned long flags; 457 int i; 458 459 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 460 461 for_each_set_bit(i, &queues, hw->queues) 462 __ieee80211_stop_queue(hw, i, reason, refcounted); 463 464 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 465 } 466 467 void ieee80211_stop_queues(struct ieee80211_hw *hw) 468 { 469 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 470 IEEE80211_QUEUE_STOP_REASON_DRIVER, 471 false); 472 } 473 EXPORT_SYMBOL(ieee80211_stop_queues); 474 475 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 476 { 477 struct ieee80211_local *local = hw_to_local(hw); 478 unsigned long flags; 479 int ret; 480 481 if (WARN_ON(queue >= hw->queues)) 482 return true; 483 484 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 485 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 486 &local->queue_stop_reasons[queue]); 487 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 488 return ret; 489 } 490 EXPORT_SYMBOL(ieee80211_queue_stopped); 491 492 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 493 unsigned long queues, 494 enum queue_stop_reason reason, 495 bool refcounted) 496 { 497 struct ieee80211_local *local = hw_to_local(hw); 498 unsigned long flags; 499 int i; 500 501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 502 503 for_each_set_bit(i, &queues, hw->queues) 504 __ieee80211_wake_queue(hw, i, reason, refcounted); 505 506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 507 } 508 509 void ieee80211_wake_queues(struct ieee80211_hw *hw) 510 { 511 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 512 IEEE80211_QUEUE_STOP_REASON_DRIVER, 513 false); 514 } 515 EXPORT_SYMBOL(ieee80211_wake_queues); 516 517 static unsigned int 518 ieee80211_get_vif_queues(struct ieee80211_local *local, 519 struct ieee80211_sub_if_data *sdata) 520 { 521 unsigned int queues; 522 523 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 524 int ac; 525 526 queues = 0; 527 528 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 529 queues |= BIT(sdata->vif.hw_queue[ac]); 530 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 531 queues |= BIT(sdata->vif.cab_queue); 532 } else { 533 /* all queues */ 534 queues = BIT(local->hw.queues) - 1; 535 } 536 537 return queues; 538 } 539 540 void __ieee80211_flush_queues(struct ieee80211_local *local, 541 struct ieee80211_sub_if_data *sdata, 542 unsigned int queues, bool drop) 543 { 544 if (!local->ops->flush) 545 return; 546 547 /* 548 * If no queue was set, or if the HW doesn't support 549 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 550 */ 551 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 552 queues = ieee80211_get_vif_queues(local, sdata); 553 554 ieee80211_stop_queues_by_reason(&local->hw, queues, 555 IEEE80211_QUEUE_STOP_REASON_FLUSH, 556 false); 557 558 drv_flush(local, sdata, queues, drop); 559 560 ieee80211_wake_queues_by_reason(&local->hw, queues, 561 IEEE80211_QUEUE_STOP_REASON_FLUSH, 562 false); 563 } 564 565 void ieee80211_flush_queues(struct ieee80211_local *local, 566 struct ieee80211_sub_if_data *sdata, bool drop) 567 { 568 __ieee80211_flush_queues(local, sdata, 0, drop); 569 } 570 571 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 572 struct ieee80211_sub_if_data *sdata, 573 enum queue_stop_reason reason) 574 { 575 ieee80211_stop_queues_by_reason(&local->hw, 576 ieee80211_get_vif_queues(local, sdata), 577 reason, true); 578 } 579 580 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 581 struct ieee80211_sub_if_data *sdata, 582 enum queue_stop_reason reason) 583 { 584 ieee80211_wake_queues_by_reason(&local->hw, 585 ieee80211_get_vif_queues(local, sdata), 586 reason, true); 587 } 588 589 static void __iterate_interfaces(struct ieee80211_local *local, 590 u32 iter_flags, 591 void (*iterator)(void *data, u8 *mac, 592 struct ieee80211_vif *vif), 593 void *data) 594 { 595 struct ieee80211_sub_if_data *sdata; 596 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 597 598 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 599 switch (sdata->vif.type) { 600 case NL80211_IFTYPE_MONITOR: 601 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 602 continue; 603 break; 604 case NL80211_IFTYPE_AP_VLAN: 605 continue; 606 default: 607 break; 608 } 609 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 610 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 611 continue; 612 if (ieee80211_sdata_running(sdata) || !active_only) 613 iterator(data, sdata->vif.addr, 614 &sdata->vif); 615 } 616 617 sdata = rcu_dereference_check(local->monitor_sdata, 618 lockdep_is_held(&local->iflist_mtx) || 619 lockdep_rtnl_is_held()); 620 if (sdata && 621 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 622 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 623 iterator(data, sdata->vif.addr, &sdata->vif); 624 } 625 626 void ieee80211_iterate_interfaces( 627 struct ieee80211_hw *hw, u32 iter_flags, 628 void (*iterator)(void *data, u8 *mac, 629 struct ieee80211_vif *vif), 630 void *data) 631 { 632 struct ieee80211_local *local = hw_to_local(hw); 633 634 mutex_lock(&local->iflist_mtx); 635 __iterate_interfaces(local, iter_flags, iterator, data); 636 mutex_unlock(&local->iflist_mtx); 637 } 638 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 639 640 void ieee80211_iterate_active_interfaces_atomic( 641 struct ieee80211_hw *hw, u32 iter_flags, 642 void (*iterator)(void *data, u8 *mac, 643 struct ieee80211_vif *vif), 644 void *data) 645 { 646 struct ieee80211_local *local = hw_to_local(hw); 647 648 rcu_read_lock(); 649 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 650 iterator, data); 651 rcu_read_unlock(); 652 } 653 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 654 655 void ieee80211_iterate_active_interfaces_rtnl( 656 struct ieee80211_hw *hw, u32 iter_flags, 657 void (*iterator)(void *data, u8 *mac, 658 struct ieee80211_vif *vif), 659 void *data) 660 { 661 struct ieee80211_local *local = hw_to_local(hw); 662 663 ASSERT_RTNL(); 664 665 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 666 iterator, data); 667 } 668 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 669 670 static void __iterate_stations(struct ieee80211_local *local, 671 void (*iterator)(void *data, 672 struct ieee80211_sta *sta), 673 void *data) 674 { 675 struct sta_info *sta; 676 677 list_for_each_entry_rcu(sta, &local->sta_list, list) { 678 if (!sta->uploaded) 679 continue; 680 681 iterator(data, &sta->sta); 682 } 683 } 684 685 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 686 void (*iterator)(void *data, 687 struct ieee80211_sta *sta), 688 void *data) 689 { 690 struct ieee80211_local *local = hw_to_local(hw); 691 692 rcu_read_lock(); 693 __iterate_stations(local, iterator, data); 694 rcu_read_unlock(); 695 } 696 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 697 698 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 699 { 700 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 701 702 if (!ieee80211_sdata_running(sdata) || 703 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 704 return NULL; 705 return &sdata->vif; 706 } 707 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 708 709 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 710 { 711 struct ieee80211_sub_if_data *sdata; 712 713 if (!vif) 714 return NULL; 715 716 sdata = vif_to_sdata(vif); 717 718 if (!ieee80211_sdata_running(sdata) || 719 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 720 return NULL; 721 722 return &sdata->wdev; 723 } 724 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 725 726 /* 727 * Nothing should have been stuffed into the workqueue during 728 * the suspend->resume cycle. Since we can't check each caller 729 * of this function if we are already quiescing / suspended, 730 * check here and don't WARN since this can actually happen when 731 * the rx path (for example) is racing against __ieee80211_suspend 732 * and suspending / quiescing was set after the rx path checked 733 * them. 734 */ 735 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 736 { 737 if (local->quiescing || (local->suspended && !local->resuming)) { 738 pr_warn("queueing ieee80211 work while going to suspend\n"); 739 return false; 740 } 741 742 return true; 743 } 744 745 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 746 { 747 struct ieee80211_local *local = hw_to_local(hw); 748 749 if (!ieee80211_can_queue_work(local)) 750 return; 751 752 queue_work(local->workqueue, work); 753 } 754 EXPORT_SYMBOL(ieee80211_queue_work); 755 756 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 757 struct delayed_work *dwork, 758 unsigned long delay) 759 { 760 struct ieee80211_local *local = hw_to_local(hw); 761 762 if (!ieee80211_can_queue_work(local)) 763 return; 764 765 queue_delayed_work(local->workqueue, dwork, delay); 766 } 767 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 768 769 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 770 struct ieee802_11_elems *elems, 771 u64 filter, u32 crc) 772 { 773 size_t left = len; 774 const u8 *pos = start; 775 bool calc_crc = filter != 0; 776 DECLARE_BITMAP(seen_elems, 256); 777 const u8 *ie; 778 779 bitmap_zero(seen_elems, 256); 780 memset(elems, 0, sizeof(*elems)); 781 elems->ie_start = start; 782 elems->total_len = len; 783 784 while (left >= 2) { 785 u8 id, elen; 786 bool elem_parse_failed; 787 788 id = *pos++; 789 elen = *pos++; 790 left -= 2; 791 792 if (elen > left) { 793 elems->parse_error = true; 794 break; 795 } 796 797 switch (id) { 798 case WLAN_EID_SSID: 799 case WLAN_EID_SUPP_RATES: 800 case WLAN_EID_FH_PARAMS: 801 case WLAN_EID_DS_PARAMS: 802 case WLAN_EID_CF_PARAMS: 803 case WLAN_EID_TIM: 804 case WLAN_EID_IBSS_PARAMS: 805 case WLAN_EID_CHALLENGE: 806 case WLAN_EID_RSN: 807 case WLAN_EID_ERP_INFO: 808 case WLAN_EID_EXT_SUPP_RATES: 809 case WLAN_EID_HT_CAPABILITY: 810 case WLAN_EID_HT_OPERATION: 811 case WLAN_EID_VHT_CAPABILITY: 812 case WLAN_EID_VHT_OPERATION: 813 case WLAN_EID_MESH_ID: 814 case WLAN_EID_MESH_CONFIG: 815 case WLAN_EID_PEER_MGMT: 816 case WLAN_EID_PREQ: 817 case WLAN_EID_PREP: 818 case WLAN_EID_PERR: 819 case WLAN_EID_RANN: 820 case WLAN_EID_CHANNEL_SWITCH: 821 case WLAN_EID_EXT_CHANSWITCH_ANN: 822 case WLAN_EID_COUNTRY: 823 case WLAN_EID_PWR_CONSTRAINT: 824 case WLAN_EID_TIMEOUT_INTERVAL: 825 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 826 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 827 case WLAN_EID_CHAN_SWITCH_PARAM: 828 case WLAN_EID_EXT_CAPABILITY: 829 case WLAN_EID_CHAN_SWITCH_TIMING: 830 case WLAN_EID_LINK_ID: 831 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 832 /* 833 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 834 * that if the content gets bigger it might be needed more than once 835 */ 836 if (test_bit(id, seen_elems)) { 837 elems->parse_error = true; 838 left -= elen; 839 pos += elen; 840 continue; 841 } 842 break; 843 } 844 845 if (calc_crc && id < 64 && (filter & (1ULL << id))) 846 crc = crc32_be(crc, pos - 2, elen + 2); 847 848 elem_parse_failed = false; 849 850 switch (id) { 851 case WLAN_EID_LINK_ID: 852 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 853 elem_parse_failed = true; 854 break; 855 } 856 elems->lnk_id = (void *)(pos - 2); 857 break; 858 case WLAN_EID_CHAN_SWITCH_TIMING: 859 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 860 elem_parse_failed = true; 861 break; 862 } 863 elems->ch_sw_timing = (void *)pos; 864 break; 865 case WLAN_EID_EXT_CAPABILITY: 866 elems->ext_capab = pos; 867 elems->ext_capab_len = elen; 868 break; 869 case WLAN_EID_SSID: 870 elems->ssid = pos; 871 elems->ssid_len = elen; 872 break; 873 case WLAN_EID_SUPP_RATES: 874 elems->supp_rates = pos; 875 elems->supp_rates_len = elen; 876 break; 877 case WLAN_EID_DS_PARAMS: 878 if (elen >= 1) 879 elems->ds_params = pos; 880 else 881 elem_parse_failed = true; 882 break; 883 case WLAN_EID_TIM: 884 if (elen >= sizeof(struct ieee80211_tim_ie)) { 885 elems->tim = (void *)pos; 886 elems->tim_len = elen; 887 } else 888 elem_parse_failed = true; 889 break; 890 case WLAN_EID_CHALLENGE: 891 elems->challenge = pos; 892 elems->challenge_len = elen; 893 break; 894 case WLAN_EID_VENDOR_SPECIFIC: 895 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 896 pos[2] == 0xf2) { 897 /* Microsoft OUI (00:50:F2) */ 898 899 if (calc_crc) 900 crc = crc32_be(crc, pos - 2, elen + 2); 901 902 if (elen >= 5 && pos[3] == 2) { 903 /* OUI Type 2 - WMM IE */ 904 if (pos[4] == 0) { 905 elems->wmm_info = pos; 906 elems->wmm_info_len = elen; 907 } else if (pos[4] == 1) { 908 elems->wmm_param = pos; 909 elems->wmm_param_len = elen; 910 } 911 } 912 } 913 break; 914 case WLAN_EID_RSN: 915 elems->rsn = pos; 916 elems->rsn_len = elen; 917 break; 918 case WLAN_EID_ERP_INFO: 919 if (elen >= 1) 920 elems->erp_info = pos; 921 else 922 elem_parse_failed = true; 923 break; 924 case WLAN_EID_EXT_SUPP_RATES: 925 elems->ext_supp_rates = pos; 926 elems->ext_supp_rates_len = elen; 927 break; 928 case WLAN_EID_HT_CAPABILITY: 929 if (elen >= sizeof(struct ieee80211_ht_cap)) 930 elems->ht_cap_elem = (void *)pos; 931 else 932 elem_parse_failed = true; 933 break; 934 case WLAN_EID_HT_OPERATION: 935 if (elen >= sizeof(struct ieee80211_ht_operation)) 936 elems->ht_operation = (void *)pos; 937 else 938 elem_parse_failed = true; 939 break; 940 case WLAN_EID_VHT_CAPABILITY: 941 if (elen >= sizeof(struct ieee80211_vht_cap)) 942 elems->vht_cap_elem = (void *)pos; 943 else 944 elem_parse_failed = true; 945 break; 946 case WLAN_EID_VHT_OPERATION: 947 if (elen >= sizeof(struct ieee80211_vht_operation)) 948 elems->vht_operation = (void *)pos; 949 else 950 elem_parse_failed = true; 951 break; 952 case WLAN_EID_OPMODE_NOTIF: 953 if (elen > 0) 954 elems->opmode_notif = pos; 955 else 956 elem_parse_failed = true; 957 break; 958 case WLAN_EID_MESH_ID: 959 elems->mesh_id = pos; 960 elems->mesh_id_len = elen; 961 break; 962 case WLAN_EID_MESH_CONFIG: 963 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 964 elems->mesh_config = (void *)pos; 965 else 966 elem_parse_failed = true; 967 break; 968 case WLAN_EID_PEER_MGMT: 969 elems->peering = pos; 970 elems->peering_len = elen; 971 break; 972 case WLAN_EID_MESH_AWAKE_WINDOW: 973 if (elen >= 2) 974 elems->awake_window = (void *)pos; 975 break; 976 case WLAN_EID_PREQ: 977 elems->preq = pos; 978 elems->preq_len = elen; 979 break; 980 case WLAN_EID_PREP: 981 elems->prep = pos; 982 elems->prep_len = elen; 983 break; 984 case WLAN_EID_PERR: 985 elems->perr = pos; 986 elems->perr_len = elen; 987 break; 988 case WLAN_EID_RANN: 989 if (elen >= sizeof(struct ieee80211_rann_ie)) 990 elems->rann = (void *)pos; 991 else 992 elem_parse_failed = true; 993 break; 994 case WLAN_EID_CHANNEL_SWITCH: 995 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 996 elem_parse_failed = true; 997 break; 998 } 999 elems->ch_switch_ie = (void *)pos; 1000 break; 1001 case WLAN_EID_EXT_CHANSWITCH_ANN: 1002 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1003 elem_parse_failed = true; 1004 break; 1005 } 1006 elems->ext_chansw_ie = (void *)pos; 1007 break; 1008 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1009 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1010 elem_parse_failed = true; 1011 break; 1012 } 1013 elems->sec_chan_offs = (void *)pos; 1014 break; 1015 case WLAN_EID_CHAN_SWITCH_PARAM: 1016 if (elen != 1017 sizeof(*elems->mesh_chansw_params_ie)) { 1018 elem_parse_failed = true; 1019 break; 1020 } 1021 elems->mesh_chansw_params_ie = (void *)pos; 1022 break; 1023 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1024 if (!action || 1025 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1026 elem_parse_failed = true; 1027 break; 1028 } 1029 elems->wide_bw_chansw_ie = (void *)pos; 1030 break; 1031 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1032 if (action) { 1033 elem_parse_failed = true; 1034 break; 1035 } 1036 /* 1037 * This is a bit tricky, but as we only care about 1038 * the wide bandwidth channel switch element, so 1039 * just parse it out manually. 1040 */ 1041 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1042 pos, elen); 1043 if (ie) { 1044 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1045 elems->wide_bw_chansw_ie = 1046 (void *)(ie + 2); 1047 else 1048 elem_parse_failed = true; 1049 } 1050 break; 1051 case WLAN_EID_COUNTRY: 1052 elems->country_elem = pos; 1053 elems->country_elem_len = elen; 1054 break; 1055 case WLAN_EID_PWR_CONSTRAINT: 1056 if (elen != 1) { 1057 elem_parse_failed = true; 1058 break; 1059 } 1060 elems->pwr_constr_elem = pos; 1061 break; 1062 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1063 /* Lots of different options exist, but we only care 1064 * about the Dynamic Transmit Power Control element. 1065 * First check for the Cisco OUI, then for the DTPC 1066 * tag (0x00). 1067 */ 1068 if (elen < 4) { 1069 elem_parse_failed = true; 1070 break; 1071 } 1072 1073 if (pos[0] != 0x00 || pos[1] != 0x40 || 1074 pos[2] != 0x96 || pos[3] != 0x00) 1075 break; 1076 1077 if (elen != 6) { 1078 elem_parse_failed = true; 1079 break; 1080 } 1081 1082 if (calc_crc) 1083 crc = crc32_be(crc, pos - 2, elen + 2); 1084 1085 elems->cisco_dtpc_elem = pos; 1086 break; 1087 case WLAN_EID_TIMEOUT_INTERVAL: 1088 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1089 elems->timeout_int = (void *)pos; 1090 else 1091 elem_parse_failed = true; 1092 break; 1093 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1094 if (elen >= sizeof(*elems->max_idle_period_ie)) 1095 elems->max_idle_period_ie = (void *)pos; 1096 break; 1097 default: 1098 break; 1099 } 1100 1101 if (elem_parse_failed) 1102 elems->parse_error = true; 1103 else 1104 __set_bit(id, seen_elems); 1105 1106 left -= elen; 1107 pos += elen; 1108 } 1109 1110 if (left != 0) 1111 elems->parse_error = true; 1112 1113 return crc; 1114 } 1115 1116 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1117 bool bss_notify, bool enable_qos) 1118 { 1119 struct ieee80211_local *local = sdata->local; 1120 struct ieee80211_tx_queue_params qparam; 1121 struct ieee80211_chanctx_conf *chanctx_conf; 1122 int ac; 1123 bool use_11b; 1124 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1125 int aCWmin, aCWmax; 1126 1127 if (!local->ops->conf_tx) 1128 return; 1129 1130 if (local->hw.queues < IEEE80211_NUM_ACS) 1131 return; 1132 1133 memset(&qparam, 0, sizeof(qparam)); 1134 1135 rcu_read_lock(); 1136 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1137 use_11b = (chanctx_conf && 1138 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1139 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1140 rcu_read_unlock(); 1141 1142 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1143 1144 /* Set defaults according to 802.11-2007 Table 7-37 */ 1145 aCWmax = 1023; 1146 if (use_11b) 1147 aCWmin = 31; 1148 else 1149 aCWmin = 15; 1150 1151 /* Confiure old 802.11b/g medium access rules. */ 1152 qparam.cw_max = aCWmax; 1153 qparam.cw_min = aCWmin; 1154 qparam.txop = 0; 1155 qparam.aifs = 2; 1156 1157 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1158 /* Update if QoS is enabled. */ 1159 if (enable_qos) { 1160 switch (ac) { 1161 case IEEE80211_AC_BK: 1162 qparam.cw_max = aCWmax; 1163 qparam.cw_min = aCWmin; 1164 qparam.txop = 0; 1165 if (is_ocb) 1166 qparam.aifs = 9; 1167 else 1168 qparam.aifs = 7; 1169 break; 1170 /* never happens but let's not leave undefined */ 1171 default: 1172 case IEEE80211_AC_BE: 1173 qparam.cw_max = aCWmax; 1174 qparam.cw_min = aCWmin; 1175 qparam.txop = 0; 1176 if (is_ocb) 1177 qparam.aifs = 6; 1178 else 1179 qparam.aifs = 3; 1180 break; 1181 case IEEE80211_AC_VI: 1182 qparam.cw_max = aCWmin; 1183 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1184 if (is_ocb) 1185 qparam.txop = 0; 1186 else if (use_11b) 1187 qparam.txop = 6016/32; 1188 else 1189 qparam.txop = 3008/32; 1190 1191 if (is_ocb) 1192 qparam.aifs = 3; 1193 else 1194 qparam.aifs = 2; 1195 break; 1196 case IEEE80211_AC_VO: 1197 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1198 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1199 if (is_ocb) 1200 qparam.txop = 0; 1201 else if (use_11b) 1202 qparam.txop = 3264/32; 1203 else 1204 qparam.txop = 1504/32; 1205 qparam.aifs = 2; 1206 break; 1207 } 1208 } 1209 1210 qparam.uapsd = false; 1211 1212 sdata->tx_conf[ac] = qparam; 1213 drv_conf_tx(local, sdata, ac, &qparam); 1214 } 1215 1216 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1217 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1218 sdata->vif.type != NL80211_IFTYPE_NAN) { 1219 sdata->vif.bss_conf.qos = enable_qos; 1220 if (bss_notify) 1221 ieee80211_bss_info_change_notify(sdata, 1222 BSS_CHANGED_QOS); 1223 } 1224 } 1225 1226 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1227 u16 transaction, u16 auth_alg, u16 status, 1228 const u8 *extra, size_t extra_len, const u8 *da, 1229 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1230 u32 tx_flags) 1231 { 1232 struct ieee80211_local *local = sdata->local; 1233 struct sk_buff *skb; 1234 struct ieee80211_mgmt *mgmt; 1235 int err; 1236 1237 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1238 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1239 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1240 if (!skb) 1241 return; 1242 1243 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1244 1245 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); 1246 memset(mgmt, 0, 24 + 6); 1247 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1248 IEEE80211_STYPE_AUTH); 1249 memcpy(mgmt->da, da, ETH_ALEN); 1250 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1251 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1252 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1253 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1254 mgmt->u.auth.status_code = cpu_to_le16(status); 1255 if (extra) 1256 memcpy(skb_put(skb, extra_len), extra, extra_len); 1257 1258 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1259 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1260 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1261 WARN_ON(err); 1262 } 1263 1264 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1265 tx_flags; 1266 ieee80211_tx_skb(sdata, skb); 1267 } 1268 1269 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1270 const u8 *bssid, u16 stype, u16 reason, 1271 bool send_frame, u8 *frame_buf) 1272 { 1273 struct ieee80211_local *local = sdata->local; 1274 struct sk_buff *skb; 1275 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1276 1277 /* build frame */ 1278 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1279 mgmt->duration = 0; /* initialize only */ 1280 mgmt->seq_ctrl = 0; /* initialize only */ 1281 memcpy(mgmt->da, bssid, ETH_ALEN); 1282 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1283 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1284 /* u.deauth.reason_code == u.disassoc.reason_code */ 1285 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1286 1287 if (send_frame) { 1288 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1289 IEEE80211_DEAUTH_FRAME_LEN); 1290 if (!skb) 1291 return; 1292 1293 skb_reserve(skb, local->hw.extra_tx_headroom); 1294 1295 /* copy in frame */ 1296 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), 1297 mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1298 1299 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1300 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1301 IEEE80211_SKB_CB(skb)->flags |= 1302 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1303 1304 ieee80211_tx_skb(sdata, skb); 1305 } 1306 } 1307 1308 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1309 u8 *buffer, size_t buffer_len, 1310 const u8 *ie, size_t ie_len, 1311 enum nl80211_band band, 1312 u32 rate_mask, 1313 struct cfg80211_chan_def *chandef, 1314 size_t *offset) 1315 { 1316 struct ieee80211_supported_band *sband; 1317 u8 *pos = buffer, *end = buffer + buffer_len; 1318 size_t noffset; 1319 int supp_rates_len, i; 1320 u8 rates[32]; 1321 int num_rates; 1322 int ext_rates_len; 1323 int shift; 1324 u32 rate_flags; 1325 bool have_80mhz = false; 1326 1327 *offset = 0; 1328 1329 sband = local->hw.wiphy->bands[band]; 1330 if (WARN_ON_ONCE(!sband)) 1331 return 0; 1332 1333 rate_flags = ieee80211_chandef_rate_flags(chandef); 1334 shift = ieee80211_chandef_get_shift(chandef); 1335 1336 num_rates = 0; 1337 for (i = 0; i < sband->n_bitrates; i++) { 1338 if ((BIT(i) & rate_mask) == 0) 1339 continue; /* skip rate */ 1340 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1341 continue; 1342 1343 rates[num_rates++] = 1344 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1345 (1 << shift) * 5); 1346 } 1347 1348 supp_rates_len = min_t(int, num_rates, 8); 1349 1350 if (end - pos < 2 + supp_rates_len) 1351 goto out_err; 1352 *pos++ = WLAN_EID_SUPP_RATES; 1353 *pos++ = supp_rates_len; 1354 memcpy(pos, rates, supp_rates_len); 1355 pos += supp_rates_len; 1356 1357 /* insert "request information" if in custom IEs */ 1358 if (ie && ie_len) { 1359 static const u8 before_extrates[] = { 1360 WLAN_EID_SSID, 1361 WLAN_EID_SUPP_RATES, 1362 WLAN_EID_REQUEST, 1363 }; 1364 noffset = ieee80211_ie_split(ie, ie_len, 1365 before_extrates, 1366 ARRAY_SIZE(before_extrates), 1367 *offset); 1368 if (end - pos < noffset - *offset) 1369 goto out_err; 1370 memcpy(pos, ie + *offset, noffset - *offset); 1371 pos += noffset - *offset; 1372 *offset = noffset; 1373 } 1374 1375 ext_rates_len = num_rates - supp_rates_len; 1376 if (ext_rates_len > 0) { 1377 if (end - pos < 2 + ext_rates_len) 1378 goto out_err; 1379 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1380 *pos++ = ext_rates_len; 1381 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1382 pos += ext_rates_len; 1383 } 1384 1385 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1386 if (end - pos < 3) 1387 goto out_err; 1388 *pos++ = WLAN_EID_DS_PARAMS; 1389 *pos++ = 1; 1390 *pos++ = ieee80211_frequency_to_channel( 1391 chandef->chan->center_freq); 1392 } 1393 1394 /* insert custom IEs that go before HT */ 1395 if (ie && ie_len) { 1396 static const u8 before_ht[] = { 1397 WLAN_EID_SSID, 1398 WLAN_EID_SUPP_RATES, 1399 WLAN_EID_REQUEST, 1400 WLAN_EID_EXT_SUPP_RATES, 1401 WLAN_EID_DS_PARAMS, 1402 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1403 }; 1404 noffset = ieee80211_ie_split(ie, ie_len, 1405 before_ht, ARRAY_SIZE(before_ht), 1406 *offset); 1407 if (end - pos < noffset - *offset) 1408 goto out_err; 1409 memcpy(pos, ie + *offset, noffset - *offset); 1410 pos += noffset - *offset; 1411 *offset = noffset; 1412 } 1413 1414 if (sband->ht_cap.ht_supported) { 1415 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1416 goto out_err; 1417 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1418 sband->ht_cap.cap); 1419 } 1420 1421 /* 1422 * If adding more here, adjust code in main.c 1423 * that calculates local->scan_ies_len. 1424 */ 1425 1426 /* insert custom IEs that go before VHT */ 1427 if (ie && ie_len) { 1428 static const u8 before_vht[] = { 1429 WLAN_EID_SSID, 1430 WLAN_EID_SUPP_RATES, 1431 WLAN_EID_REQUEST, 1432 WLAN_EID_EXT_SUPP_RATES, 1433 WLAN_EID_DS_PARAMS, 1434 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1435 WLAN_EID_HT_CAPABILITY, 1436 WLAN_EID_BSS_COEX_2040, 1437 WLAN_EID_EXT_CAPABILITY, 1438 WLAN_EID_SSID_LIST, 1439 WLAN_EID_CHANNEL_USAGE, 1440 WLAN_EID_INTERWORKING, 1441 /* mesh ID can't happen here */ 1442 /* 60 GHz can't happen here right now */ 1443 }; 1444 noffset = ieee80211_ie_split(ie, ie_len, 1445 before_vht, ARRAY_SIZE(before_vht), 1446 *offset); 1447 if (end - pos < noffset - *offset) 1448 goto out_err; 1449 memcpy(pos, ie + *offset, noffset - *offset); 1450 pos += noffset - *offset; 1451 *offset = noffset; 1452 } 1453 1454 /* Check if any channel in this sband supports at least 80 MHz */ 1455 for (i = 0; i < sband->n_channels; i++) { 1456 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1457 IEEE80211_CHAN_NO_80MHZ)) 1458 continue; 1459 1460 have_80mhz = true; 1461 break; 1462 } 1463 1464 if (sband->vht_cap.vht_supported && have_80mhz) { 1465 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1466 goto out_err; 1467 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1468 sband->vht_cap.cap); 1469 } 1470 1471 return pos - buffer; 1472 out_err: 1473 WARN_ONCE(1, "not enough space for preq IEs\n"); 1474 return pos - buffer; 1475 } 1476 1477 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1478 size_t buffer_len, 1479 struct ieee80211_scan_ies *ie_desc, 1480 const u8 *ie, size_t ie_len, 1481 u8 bands_used, u32 *rate_masks, 1482 struct cfg80211_chan_def *chandef) 1483 { 1484 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1485 int i; 1486 1487 memset(ie_desc, 0, sizeof(*ie_desc)); 1488 1489 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1490 if (bands_used & BIT(i)) { 1491 pos += ieee80211_build_preq_ies_band(local, 1492 buffer + pos, 1493 buffer_len - pos, 1494 ie, ie_len, i, 1495 rate_masks[i], 1496 chandef, 1497 &custom_ie_offset); 1498 ie_desc->ies[i] = buffer + old_pos; 1499 ie_desc->len[i] = pos - old_pos; 1500 old_pos = pos; 1501 } 1502 } 1503 1504 /* add any remaining custom IEs */ 1505 if (ie && ie_len) { 1506 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1507 "not enough space for preq custom IEs\n")) 1508 return pos; 1509 memcpy(buffer + pos, ie + custom_ie_offset, 1510 ie_len - custom_ie_offset); 1511 ie_desc->common_ies = buffer + pos; 1512 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1513 pos += ie_len - custom_ie_offset; 1514 } 1515 1516 return pos; 1517 }; 1518 1519 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1520 const u8 *src, const u8 *dst, 1521 u32 ratemask, 1522 struct ieee80211_channel *chan, 1523 const u8 *ssid, size_t ssid_len, 1524 const u8 *ie, size_t ie_len, 1525 bool directed) 1526 { 1527 struct ieee80211_local *local = sdata->local; 1528 struct cfg80211_chan_def chandef; 1529 struct sk_buff *skb; 1530 struct ieee80211_mgmt *mgmt; 1531 int ies_len; 1532 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1533 struct ieee80211_scan_ies dummy_ie_desc; 1534 1535 /* 1536 * Do not send DS Channel parameter for directed probe requests 1537 * in order to maximize the chance that we get a response. Some 1538 * badly-behaved APs don't respond when this parameter is included. 1539 */ 1540 chandef.width = sdata->vif.bss_conf.chandef.width; 1541 if (directed) 1542 chandef.chan = NULL; 1543 else 1544 chandef.chan = chan; 1545 1546 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1547 100 + ie_len); 1548 if (!skb) 1549 return NULL; 1550 1551 rate_masks[chan->band] = ratemask; 1552 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1553 skb_tailroom(skb), &dummy_ie_desc, 1554 ie, ie_len, BIT(chan->band), 1555 rate_masks, &chandef); 1556 skb_put(skb, ies_len); 1557 1558 if (dst) { 1559 mgmt = (struct ieee80211_mgmt *) skb->data; 1560 memcpy(mgmt->da, dst, ETH_ALEN); 1561 memcpy(mgmt->bssid, dst, ETH_ALEN); 1562 } 1563 1564 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1565 1566 return skb; 1567 } 1568 1569 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, 1570 const u8 *src, const u8 *dst, 1571 const u8 *ssid, size_t ssid_len, 1572 const u8 *ie, size_t ie_len, 1573 u32 ratemask, bool directed, u32 tx_flags, 1574 struct ieee80211_channel *channel, bool scan) 1575 { 1576 struct sk_buff *skb; 1577 1578 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, 1579 ssid, ssid_len, 1580 ie, ie_len, directed); 1581 if (skb) { 1582 IEEE80211_SKB_CB(skb)->flags |= tx_flags; 1583 if (scan) 1584 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); 1585 else 1586 ieee80211_tx_skb(sdata, skb); 1587 } 1588 } 1589 1590 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1591 struct ieee802_11_elems *elems, 1592 enum nl80211_band band, u32 *basic_rates) 1593 { 1594 struct ieee80211_supported_band *sband; 1595 size_t num_rates; 1596 u32 supp_rates, rate_flags; 1597 int i, j, shift; 1598 1599 sband = sdata->local->hw.wiphy->bands[band]; 1600 if (WARN_ON(!sband)) 1601 return 1; 1602 1603 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1604 shift = ieee80211_vif_get_shift(&sdata->vif); 1605 1606 num_rates = sband->n_bitrates; 1607 supp_rates = 0; 1608 for (i = 0; i < elems->supp_rates_len + 1609 elems->ext_supp_rates_len; i++) { 1610 u8 rate = 0; 1611 int own_rate; 1612 bool is_basic; 1613 if (i < elems->supp_rates_len) 1614 rate = elems->supp_rates[i]; 1615 else if (elems->ext_supp_rates) 1616 rate = elems->ext_supp_rates 1617 [i - elems->supp_rates_len]; 1618 own_rate = 5 * (rate & 0x7f); 1619 is_basic = !!(rate & 0x80); 1620 1621 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1622 continue; 1623 1624 for (j = 0; j < num_rates; j++) { 1625 int brate; 1626 if ((rate_flags & sband->bitrates[j].flags) 1627 != rate_flags) 1628 continue; 1629 1630 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1631 1 << shift); 1632 1633 if (brate == own_rate) { 1634 supp_rates |= BIT(j); 1635 if (basic_rates && is_basic) 1636 *basic_rates |= BIT(j); 1637 } 1638 } 1639 } 1640 return supp_rates; 1641 } 1642 1643 void ieee80211_stop_device(struct ieee80211_local *local) 1644 { 1645 ieee80211_led_radio(local, false); 1646 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1647 1648 cancel_work_sync(&local->reconfig_filter); 1649 1650 flush_workqueue(local->workqueue); 1651 drv_stop(local); 1652 } 1653 1654 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1655 bool aborted) 1656 { 1657 /* It's possible that we don't handle the scan completion in 1658 * time during suspend, so if it's still marked as completed 1659 * here, queue the work and flush it to clean things up. 1660 * Instead of calling the worker function directly here, we 1661 * really queue it to avoid potential races with other flows 1662 * scheduling the same work. 1663 */ 1664 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1665 /* If coming from reconfiguration failure, abort the scan so 1666 * we don't attempt to continue a partial HW scan - which is 1667 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1668 * completed scan, and a 5 GHz portion is still pending. 1669 */ 1670 if (aborted) 1671 set_bit(SCAN_ABORTED, &local->scanning); 1672 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 1673 flush_delayed_work(&local->scan_work); 1674 } 1675 } 1676 1677 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1678 { 1679 struct ieee80211_sub_if_data *sdata; 1680 struct ieee80211_chanctx *ctx; 1681 1682 /* 1683 * We get here if during resume the device can't be restarted properly. 1684 * We might also get here if this happens during HW reset, which is a 1685 * slightly different situation and we need to drop all connections in 1686 * the latter case. 1687 * 1688 * Ask cfg80211 to turn off all interfaces, this will result in more 1689 * warnings but at least we'll then get into a clean stopped state. 1690 */ 1691 1692 local->resuming = false; 1693 local->suspended = false; 1694 local->in_reconfig = false; 1695 1696 ieee80211_flush_completed_scan(local, true); 1697 1698 /* scheduled scan clearly can't be running any more, but tell 1699 * cfg80211 and clear local state 1700 */ 1701 ieee80211_sched_scan_end(local); 1702 1703 list_for_each_entry(sdata, &local->interfaces, list) 1704 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1705 1706 /* Mark channel contexts as not being in the driver any more to avoid 1707 * removing them from the driver during the shutdown process... 1708 */ 1709 mutex_lock(&local->chanctx_mtx); 1710 list_for_each_entry(ctx, &local->chanctx_list, list) 1711 ctx->driver_present = false; 1712 mutex_unlock(&local->chanctx_mtx); 1713 1714 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1715 } 1716 1717 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1718 struct ieee80211_sub_if_data *sdata) 1719 { 1720 struct ieee80211_chanctx_conf *conf; 1721 struct ieee80211_chanctx *ctx; 1722 1723 if (!local->use_chanctx) 1724 return; 1725 1726 mutex_lock(&local->chanctx_mtx); 1727 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1728 lockdep_is_held(&local->chanctx_mtx)); 1729 if (conf) { 1730 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1731 drv_assign_vif_chanctx(local, sdata, ctx); 1732 } 1733 mutex_unlock(&local->chanctx_mtx); 1734 } 1735 1736 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 1737 { 1738 struct ieee80211_local *local = sdata->local; 1739 struct sta_info *sta; 1740 1741 /* add STAs back */ 1742 mutex_lock(&local->sta_mtx); 1743 list_for_each_entry(sta, &local->sta_list, list) { 1744 enum ieee80211_sta_state state; 1745 1746 if (!sta->uploaded || sta->sdata != sdata) 1747 continue; 1748 1749 for (state = IEEE80211_STA_NOTEXIST; 1750 state < sta->sta_state; state++) 1751 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1752 state + 1)); 1753 } 1754 mutex_unlock(&local->sta_mtx); 1755 } 1756 1757 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 1758 { 1759 struct cfg80211_nan_func *func, **funcs; 1760 int res, id, i = 0; 1761 1762 res = drv_start_nan(sdata->local, sdata, 1763 &sdata->u.nan.conf); 1764 if (WARN_ON(res)) 1765 return res; 1766 1767 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) * 1768 sizeof(*funcs), GFP_KERNEL); 1769 if (!funcs) 1770 return -ENOMEM; 1771 1772 /* Add all the functions: 1773 * This is a little bit ugly. We need to call a potentially sleeping 1774 * callback for each NAN function, so we can't hold the spinlock. 1775 */ 1776 spin_lock_bh(&sdata->u.nan.func_lock); 1777 1778 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 1779 funcs[i++] = func; 1780 1781 spin_unlock_bh(&sdata->u.nan.func_lock); 1782 1783 for (i = 0; funcs[i]; i++) { 1784 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 1785 if (WARN_ON(res)) 1786 ieee80211_nan_func_terminated(&sdata->vif, 1787 funcs[i]->instance_id, 1788 NL80211_NAN_FUNC_TERM_REASON_ERROR, 1789 GFP_KERNEL); 1790 } 1791 1792 kfree(funcs); 1793 1794 return 0; 1795 } 1796 1797 int ieee80211_reconfig(struct ieee80211_local *local) 1798 { 1799 struct ieee80211_hw *hw = &local->hw; 1800 struct ieee80211_sub_if_data *sdata; 1801 struct ieee80211_chanctx *ctx; 1802 struct sta_info *sta; 1803 int res, i; 1804 bool reconfig_due_to_wowlan = false; 1805 struct ieee80211_sub_if_data *sched_scan_sdata; 1806 struct cfg80211_sched_scan_request *sched_scan_req; 1807 bool sched_scan_stopped = false; 1808 bool suspended = local->suspended; 1809 1810 /* nothing to do if HW shouldn't run */ 1811 if (!local->open_count) 1812 goto wake_up; 1813 1814 #ifdef CONFIG_PM 1815 if (suspended) 1816 local->resuming = true; 1817 1818 if (local->wowlan) { 1819 /* 1820 * In the wowlan case, both mac80211 and the device 1821 * are functional when the resume op is called, so 1822 * clear local->suspended so the device could operate 1823 * normally (e.g. pass rx frames). 1824 */ 1825 local->suspended = false; 1826 res = drv_resume(local); 1827 local->wowlan = false; 1828 if (res < 0) { 1829 local->resuming = false; 1830 return res; 1831 } 1832 if (res == 0) 1833 goto wake_up; 1834 WARN_ON(res > 1); 1835 /* 1836 * res is 1, which means the driver requested 1837 * to go through a regular reset on wakeup. 1838 * restore local->suspended in this case. 1839 */ 1840 reconfig_due_to_wowlan = true; 1841 local->suspended = true; 1842 } 1843 #endif 1844 1845 /* 1846 * In case of hw_restart during suspend (without wowlan), 1847 * cancel restart work, as we are reconfiguring the device 1848 * anyway. 1849 * Note that restart_work is scheduled on a frozen workqueue, 1850 * so we can't deadlock in this case. 1851 */ 1852 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 1853 cancel_work_sync(&local->restart_work); 1854 1855 local->started = false; 1856 1857 /* 1858 * Upon resume hardware can sometimes be goofy due to 1859 * various platform / driver / bus issues, so restarting 1860 * the device may at times not work immediately. Propagate 1861 * the error. 1862 */ 1863 res = drv_start(local); 1864 if (res) { 1865 if (suspended) 1866 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1867 else 1868 WARN(1, "Hardware became unavailable during restart.\n"); 1869 ieee80211_handle_reconfig_failure(local); 1870 return res; 1871 } 1872 1873 /* setup fragmentation threshold */ 1874 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1875 1876 /* setup RTS threshold */ 1877 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1878 1879 /* reset coverage class */ 1880 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1881 1882 ieee80211_led_radio(local, true); 1883 ieee80211_mod_tpt_led_trig(local, 1884 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1885 1886 /* add interfaces */ 1887 sdata = rtnl_dereference(local->monitor_sdata); 1888 if (sdata) { 1889 /* in HW restart it exists already */ 1890 WARN_ON(local->resuming); 1891 res = drv_add_interface(local, sdata); 1892 if (WARN_ON(res)) { 1893 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1894 synchronize_net(); 1895 kfree(sdata); 1896 } 1897 } 1898 1899 list_for_each_entry(sdata, &local->interfaces, list) { 1900 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1901 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1902 ieee80211_sdata_running(sdata)) { 1903 res = drv_add_interface(local, sdata); 1904 if (WARN_ON(res)) 1905 break; 1906 } 1907 } 1908 1909 /* If adding any of the interfaces failed above, roll back and 1910 * report failure. 1911 */ 1912 if (res) { 1913 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 1914 list) 1915 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1916 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1917 ieee80211_sdata_running(sdata)) 1918 drv_remove_interface(local, sdata); 1919 ieee80211_handle_reconfig_failure(local); 1920 return res; 1921 } 1922 1923 /* add channel contexts */ 1924 if (local->use_chanctx) { 1925 mutex_lock(&local->chanctx_mtx); 1926 list_for_each_entry(ctx, &local->chanctx_list, list) 1927 if (ctx->replace_state != 1928 IEEE80211_CHANCTX_REPLACES_OTHER) 1929 WARN_ON(drv_add_chanctx(local, ctx)); 1930 mutex_unlock(&local->chanctx_mtx); 1931 1932 sdata = rtnl_dereference(local->monitor_sdata); 1933 if (sdata && ieee80211_sdata_running(sdata)) 1934 ieee80211_assign_chanctx(local, sdata); 1935 } 1936 1937 /* reconfigure hardware */ 1938 ieee80211_hw_config(local, ~0); 1939 1940 ieee80211_configure_filter(local); 1941 1942 /* Finally also reconfigure all the BSS information */ 1943 list_for_each_entry(sdata, &local->interfaces, list) { 1944 u32 changed; 1945 1946 if (!ieee80211_sdata_running(sdata)) 1947 continue; 1948 1949 ieee80211_assign_chanctx(local, sdata); 1950 1951 switch (sdata->vif.type) { 1952 case NL80211_IFTYPE_AP_VLAN: 1953 case NL80211_IFTYPE_MONITOR: 1954 break; 1955 default: 1956 ieee80211_reconfig_stations(sdata); 1957 /* fall through */ 1958 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 1959 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1960 drv_conf_tx(local, sdata, i, 1961 &sdata->tx_conf[i]); 1962 break; 1963 } 1964 1965 /* common change flags for all interface types */ 1966 changed = BSS_CHANGED_ERP_CTS_PROT | 1967 BSS_CHANGED_ERP_PREAMBLE | 1968 BSS_CHANGED_ERP_SLOT | 1969 BSS_CHANGED_HT | 1970 BSS_CHANGED_BASIC_RATES | 1971 BSS_CHANGED_BEACON_INT | 1972 BSS_CHANGED_BSSID | 1973 BSS_CHANGED_CQM | 1974 BSS_CHANGED_QOS | 1975 BSS_CHANGED_IDLE | 1976 BSS_CHANGED_TXPOWER; 1977 1978 if (sdata->vif.mu_mimo_owner) 1979 changed |= BSS_CHANGED_MU_GROUPS; 1980 1981 switch (sdata->vif.type) { 1982 case NL80211_IFTYPE_STATION: 1983 changed |= BSS_CHANGED_ASSOC | 1984 BSS_CHANGED_ARP_FILTER | 1985 BSS_CHANGED_PS; 1986 1987 /* Re-send beacon info report to the driver */ 1988 if (sdata->u.mgd.have_beacon) 1989 changed |= BSS_CHANGED_BEACON_INFO; 1990 1991 if (sdata->vif.bss_conf.max_idle_period || 1992 sdata->vif.bss_conf.protected_keep_alive) 1993 changed |= BSS_CHANGED_KEEP_ALIVE; 1994 1995 sdata_lock(sdata); 1996 ieee80211_bss_info_change_notify(sdata, changed); 1997 sdata_unlock(sdata); 1998 break; 1999 case NL80211_IFTYPE_OCB: 2000 changed |= BSS_CHANGED_OCB; 2001 ieee80211_bss_info_change_notify(sdata, changed); 2002 break; 2003 case NL80211_IFTYPE_ADHOC: 2004 changed |= BSS_CHANGED_IBSS; 2005 /* fall through */ 2006 case NL80211_IFTYPE_AP: 2007 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2008 2009 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2010 changed |= BSS_CHANGED_AP_PROBE_RESP; 2011 2012 if (rcu_access_pointer(sdata->u.ap.beacon)) 2013 drv_start_ap(local, sdata); 2014 } 2015 2016 /* fall through */ 2017 case NL80211_IFTYPE_MESH_POINT: 2018 if (sdata->vif.bss_conf.enable_beacon) { 2019 changed |= BSS_CHANGED_BEACON | 2020 BSS_CHANGED_BEACON_ENABLED; 2021 ieee80211_bss_info_change_notify(sdata, changed); 2022 } 2023 break; 2024 case NL80211_IFTYPE_NAN: 2025 res = ieee80211_reconfig_nan(sdata); 2026 if (res < 0) { 2027 ieee80211_handle_reconfig_failure(local); 2028 return res; 2029 } 2030 break; 2031 case NL80211_IFTYPE_WDS: 2032 case NL80211_IFTYPE_AP_VLAN: 2033 case NL80211_IFTYPE_MONITOR: 2034 case NL80211_IFTYPE_P2P_DEVICE: 2035 /* nothing to do */ 2036 break; 2037 case NL80211_IFTYPE_UNSPECIFIED: 2038 case NUM_NL80211_IFTYPES: 2039 case NL80211_IFTYPE_P2P_CLIENT: 2040 case NL80211_IFTYPE_P2P_GO: 2041 WARN_ON(1); 2042 break; 2043 } 2044 } 2045 2046 ieee80211_recalc_ps(local); 2047 2048 /* 2049 * The sta might be in psm against the ap (e.g. because 2050 * this was the state before a hw restart), so we 2051 * explicitly send a null packet in order to make sure 2052 * it'll sync against the ap (and get out of psm). 2053 */ 2054 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2055 list_for_each_entry(sdata, &local->interfaces, list) { 2056 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2057 continue; 2058 if (!sdata->u.mgd.associated) 2059 continue; 2060 2061 ieee80211_send_nullfunc(local, sdata, false); 2062 } 2063 } 2064 2065 /* APs are now beaconing, add back stations */ 2066 mutex_lock(&local->sta_mtx); 2067 list_for_each_entry(sta, &local->sta_list, list) { 2068 enum ieee80211_sta_state state; 2069 2070 if (!sta->uploaded) 2071 continue; 2072 2073 if (sta->sdata->vif.type != NL80211_IFTYPE_AP) 2074 continue; 2075 2076 for (state = IEEE80211_STA_NOTEXIST; 2077 state < sta->sta_state; state++) 2078 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2079 state + 1)); 2080 } 2081 mutex_unlock(&local->sta_mtx); 2082 2083 /* add back keys */ 2084 list_for_each_entry(sdata, &local->interfaces, list) 2085 ieee80211_reset_crypto_tx_tailroom(sdata); 2086 2087 list_for_each_entry(sdata, &local->interfaces, list) 2088 if (ieee80211_sdata_running(sdata)) 2089 ieee80211_enable_keys(sdata); 2090 2091 /* Reconfigure sched scan if it was interrupted by FW restart */ 2092 mutex_lock(&local->mtx); 2093 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2094 lockdep_is_held(&local->mtx)); 2095 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2096 lockdep_is_held(&local->mtx)); 2097 if (sched_scan_sdata && sched_scan_req) 2098 /* 2099 * Sched scan stopped, but we don't want to report it. Instead, 2100 * we're trying to reschedule. However, if more than one scan 2101 * plan was set, we cannot reschedule since we don't know which 2102 * scan plan was currently running (and some scan plans may have 2103 * already finished). 2104 */ 2105 if (sched_scan_req->n_scan_plans > 1 || 2106 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2107 sched_scan_req)) { 2108 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2109 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2110 sched_scan_stopped = true; 2111 } 2112 mutex_unlock(&local->mtx); 2113 2114 if (sched_scan_stopped) 2115 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2116 2117 wake_up: 2118 if (local->in_reconfig) { 2119 local->in_reconfig = false; 2120 barrier(); 2121 2122 /* Restart deferred ROCs */ 2123 mutex_lock(&local->mtx); 2124 ieee80211_start_next_roc(local); 2125 mutex_unlock(&local->mtx); 2126 } 2127 2128 if (local->monitors == local->open_count && local->monitors > 0) 2129 ieee80211_add_virtual_monitor(local); 2130 2131 /* 2132 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2133 * sessions can be established after a resume. 2134 * 2135 * Also tear down aggregation sessions since reconfiguring 2136 * them in a hardware restart scenario is not easily done 2137 * right now, and the hardware will have lost information 2138 * about the sessions, but we and the AP still think they 2139 * are active. This is really a workaround though. 2140 */ 2141 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2142 mutex_lock(&local->sta_mtx); 2143 2144 list_for_each_entry(sta, &local->sta_list, list) { 2145 if (!local->resuming) 2146 ieee80211_sta_tear_down_BA_sessions( 2147 sta, AGG_STOP_LOCAL_REQUEST); 2148 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2149 } 2150 2151 mutex_unlock(&local->sta_mtx); 2152 } 2153 2154 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2155 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2156 false); 2157 2158 /* 2159 * If this is for hw restart things are still running. 2160 * We may want to change that later, however. 2161 */ 2162 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2163 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2164 2165 if (!suspended) 2166 return 0; 2167 2168 #ifdef CONFIG_PM 2169 /* first set suspended false, then resuming */ 2170 local->suspended = false; 2171 mb(); 2172 local->resuming = false; 2173 2174 ieee80211_flush_completed_scan(local, false); 2175 2176 if (local->open_count && !reconfig_due_to_wowlan) 2177 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2178 2179 list_for_each_entry(sdata, &local->interfaces, list) { 2180 if (!ieee80211_sdata_running(sdata)) 2181 continue; 2182 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2183 ieee80211_sta_restart(sdata); 2184 } 2185 2186 mod_timer(&local->sta_cleanup, jiffies + 1); 2187 #else 2188 WARN_ON(1); 2189 #endif 2190 2191 return 0; 2192 } 2193 2194 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2195 { 2196 struct ieee80211_sub_if_data *sdata; 2197 struct ieee80211_local *local; 2198 struct ieee80211_key *key; 2199 2200 if (WARN_ON(!vif)) 2201 return; 2202 2203 sdata = vif_to_sdata(vif); 2204 local = sdata->local; 2205 2206 if (WARN_ON(!local->resuming)) 2207 return; 2208 2209 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2210 return; 2211 2212 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2213 2214 mutex_lock(&local->key_mtx); 2215 list_for_each_entry(key, &sdata->key_list, list) 2216 key->flags |= KEY_FLAG_TAINTED; 2217 mutex_unlock(&local->key_mtx); 2218 } 2219 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2220 2221 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2222 { 2223 struct ieee80211_local *local = sdata->local; 2224 struct ieee80211_chanctx_conf *chanctx_conf; 2225 struct ieee80211_chanctx *chanctx; 2226 2227 mutex_lock(&local->chanctx_mtx); 2228 2229 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2230 lockdep_is_held(&local->chanctx_mtx)); 2231 2232 /* 2233 * This function can be called from a work, thus it may be possible 2234 * that the chanctx_conf is removed (due to a disconnection, for 2235 * example). 2236 * So nothing should be done in such case. 2237 */ 2238 if (!chanctx_conf) 2239 goto unlock; 2240 2241 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2242 ieee80211_recalc_smps_chanctx(local, chanctx); 2243 unlock: 2244 mutex_unlock(&local->chanctx_mtx); 2245 } 2246 2247 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2248 { 2249 struct ieee80211_local *local = sdata->local; 2250 struct ieee80211_chanctx_conf *chanctx_conf; 2251 struct ieee80211_chanctx *chanctx; 2252 2253 mutex_lock(&local->chanctx_mtx); 2254 2255 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2256 lockdep_is_held(&local->chanctx_mtx)); 2257 2258 if (WARN_ON_ONCE(!chanctx_conf)) 2259 goto unlock; 2260 2261 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2262 ieee80211_recalc_chanctx_min_def(local, chanctx); 2263 unlock: 2264 mutex_unlock(&local->chanctx_mtx); 2265 } 2266 2267 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2268 { 2269 size_t pos = offset; 2270 2271 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2272 pos += 2 + ies[pos + 1]; 2273 2274 return pos; 2275 } 2276 2277 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2278 int rssi_min_thold, 2279 int rssi_max_thold) 2280 { 2281 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2282 2283 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2284 return; 2285 2286 /* 2287 * Scale up threshold values before storing it, as the RSSI averaging 2288 * algorithm uses a scaled up value as well. Change this scaling 2289 * factor if the RSSI averaging algorithm changes. 2290 */ 2291 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2292 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2293 } 2294 2295 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2296 int rssi_min_thold, 2297 int rssi_max_thold) 2298 { 2299 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2300 2301 WARN_ON(rssi_min_thold == rssi_max_thold || 2302 rssi_min_thold > rssi_max_thold); 2303 2304 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2305 rssi_max_thold); 2306 } 2307 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2308 2309 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2310 { 2311 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2312 2313 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2314 } 2315 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2316 2317 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2318 u16 cap) 2319 { 2320 __le16 tmp; 2321 2322 *pos++ = WLAN_EID_HT_CAPABILITY; 2323 *pos++ = sizeof(struct ieee80211_ht_cap); 2324 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2325 2326 /* capability flags */ 2327 tmp = cpu_to_le16(cap); 2328 memcpy(pos, &tmp, sizeof(u16)); 2329 pos += sizeof(u16); 2330 2331 /* AMPDU parameters */ 2332 *pos++ = ht_cap->ampdu_factor | 2333 (ht_cap->ampdu_density << 2334 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2335 2336 /* MCS set */ 2337 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2338 pos += sizeof(ht_cap->mcs); 2339 2340 /* extended capabilities */ 2341 pos += sizeof(__le16); 2342 2343 /* BF capabilities */ 2344 pos += sizeof(__le32); 2345 2346 /* antenna selection */ 2347 pos += sizeof(u8); 2348 2349 return pos; 2350 } 2351 2352 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2353 u32 cap) 2354 { 2355 __le32 tmp; 2356 2357 *pos++ = WLAN_EID_VHT_CAPABILITY; 2358 *pos++ = sizeof(struct ieee80211_vht_cap); 2359 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2360 2361 /* capability flags */ 2362 tmp = cpu_to_le32(cap); 2363 memcpy(pos, &tmp, sizeof(u32)); 2364 pos += sizeof(u32); 2365 2366 /* VHT MCS set */ 2367 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2368 pos += sizeof(vht_cap->vht_mcs); 2369 2370 return pos; 2371 } 2372 2373 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2374 const struct cfg80211_chan_def *chandef, 2375 u16 prot_mode, bool rifs_mode) 2376 { 2377 struct ieee80211_ht_operation *ht_oper; 2378 /* Build HT Information */ 2379 *pos++ = WLAN_EID_HT_OPERATION; 2380 *pos++ = sizeof(struct ieee80211_ht_operation); 2381 ht_oper = (struct ieee80211_ht_operation *)pos; 2382 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2383 chandef->chan->center_freq); 2384 switch (chandef->width) { 2385 case NL80211_CHAN_WIDTH_160: 2386 case NL80211_CHAN_WIDTH_80P80: 2387 case NL80211_CHAN_WIDTH_80: 2388 case NL80211_CHAN_WIDTH_40: 2389 if (chandef->center_freq1 > chandef->chan->center_freq) 2390 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2391 else 2392 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2393 break; 2394 default: 2395 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2396 break; 2397 } 2398 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2399 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2400 chandef->width != NL80211_CHAN_WIDTH_20) 2401 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2402 2403 if (rifs_mode) 2404 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2405 2406 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2407 ht_oper->stbc_param = 0x0000; 2408 2409 /* It seems that Basic MCS set and Supported MCS set 2410 are identical for the first 10 bytes */ 2411 memset(&ht_oper->basic_set, 0, 16); 2412 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2413 2414 return pos + sizeof(struct ieee80211_ht_operation); 2415 } 2416 2417 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2418 const struct cfg80211_chan_def *chandef) 2419 { 2420 struct ieee80211_vht_operation *vht_oper; 2421 2422 *pos++ = WLAN_EID_VHT_OPERATION; 2423 *pos++ = sizeof(struct ieee80211_vht_operation); 2424 vht_oper = (struct ieee80211_vht_operation *)pos; 2425 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2426 chandef->center_freq1); 2427 if (chandef->center_freq2) 2428 vht_oper->center_freq_seg1_idx = 2429 ieee80211_frequency_to_channel(chandef->center_freq2); 2430 else 2431 vht_oper->center_freq_seg1_idx = 0x00; 2432 2433 switch (chandef->width) { 2434 case NL80211_CHAN_WIDTH_160: 2435 /* 2436 * Convert 160 MHz channel width to new style as interop 2437 * workaround. 2438 */ 2439 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2440 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2441 if (chandef->chan->center_freq < chandef->center_freq1) 2442 vht_oper->center_freq_seg0_idx -= 8; 2443 else 2444 vht_oper->center_freq_seg0_idx += 8; 2445 break; 2446 case NL80211_CHAN_WIDTH_80P80: 2447 /* 2448 * Convert 80+80 MHz channel width to new style as interop 2449 * workaround. 2450 */ 2451 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2452 break; 2453 case NL80211_CHAN_WIDTH_80: 2454 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2455 break; 2456 default: 2457 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2458 break; 2459 } 2460 2461 /* don't require special VHT peer rates */ 2462 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2463 2464 return pos + sizeof(struct ieee80211_vht_operation); 2465 } 2466 2467 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2468 struct cfg80211_chan_def *chandef) 2469 { 2470 enum nl80211_channel_type channel_type; 2471 2472 if (!ht_oper) 2473 return false; 2474 2475 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2476 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2477 channel_type = NL80211_CHAN_HT20; 2478 break; 2479 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2480 channel_type = NL80211_CHAN_HT40PLUS; 2481 break; 2482 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2483 channel_type = NL80211_CHAN_HT40MINUS; 2484 break; 2485 default: 2486 channel_type = NL80211_CHAN_NO_HT; 2487 return false; 2488 } 2489 2490 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2491 return true; 2492 } 2493 2494 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper, 2495 struct cfg80211_chan_def *chandef) 2496 { 2497 struct cfg80211_chan_def new = *chandef; 2498 int cf1, cf2; 2499 2500 if (!oper) 2501 return false; 2502 2503 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx, 2504 chandef->chan->band); 2505 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, 2506 chandef->chan->band); 2507 2508 switch (oper->chan_width) { 2509 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2510 break; 2511 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2512 new.width = NL80211_CHAN_WIDTH_80; 2513 new.center_freq1 = cf1; 2514 /* If needed, adjust based on the newer interop workaround. */ 2515 if (oper->center_freq_seg1_idx) { 2516 unsigned int diff; 2517 2518 diff = abs(oper->center_freq_seg1_idx - 2519 oper->center_freq_seg0_idx); 2520 if (diff == 8) { 2521 new.width = NL80211_CHAN_WIDTH_160; 2522 new.center_freq1 = cf2; 2523 } else if (diff > 8) { 2524 new.width = NL80211_CHAN_WIDTH_80P80; 2525 new.center_freq2 = cf2; 2526 } 2527 } 2528 break; 2529 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2530 new.width = NL80211_CHAN_WIDTH_160; 2531 new.center_freq1 = cf1; 2532 break; 2533 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2534 new.width = NL80211_CHAN_WIDTH_80P80; 2535 new.center_freq1 = cf1; 2536 new.center_freq2 = cf2; 2537 break; 2538 default: 2539 return false; 2540 } 2541 2542 if (!cfg80211_chandef_valid(&new)) 2543 return false; 2544 2545 *chandef = new; 2546 return true; 2547 } 2548 2549 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2550 const struct ieee80211_supported_band *sband, 2551 const u8 *srates, int srates_len, u32 *rates) 2552 { 2553 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2554 int shift = ieee80211_chandef_get_shift(chandef); 2555 struct ieee80211_rate *br; 2556 int brate, rate, i, j, count = 0; 2557 2558 *rates = 0; 2559 2560 for (i = 0; i < srates_len; i++) { 2561 rate = srates[i] & 0x7f; 2562 2563 for (j = 0; j < sband->n_bitrates; j++) { 2564 br = &sband->bitrates[j]; 2565 if ((rate_flags & br->flags) != rate_flags) 2566 continue; 2567 2568 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2569 if (brate == rate) { 2570 *rates |= BIT(j); 2571 count++; 2572 break; 2573 } 2574 } 2575 } 2576 return count; 2577 } 2578 2579 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2580 struct sk_buff *skb, bool need_basic, 2581 enum nl80211_band band) 2582 { 2583 struct ieee80211_local *local = sdata->local; 2584 struct ieee80211_supported_band *sband; 2585 int rate, shift; 2586 u8 i, rates, *pos; 2587 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2588 u32 rate_flags; 2589 2590 shift = ieee80211_vif_get_shift(&sdata->vif); 2591 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2592 sband = local->hw.wiphy->bands[band]; 2593 rates = 0; 2594 for (i = 0; i < sband->n_bitrates; i++) { 2595 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2596 continue; 2597 rates++; 2598 } 2599 if (rates > 8) 2600 rates = 8; 2601 2602 if (skb_tailroom(skb) < rates + 2) 2603 return -ENOMEM; 2604 2605 pos = skb_put(skb, rates + 2); 2606 *pos++ = WLAN_EID_SUPP_RATES; 2607 *pos++ = rates; 2608 for (i = 0; i < rates; i++) { 2609 u8 basic = 0; 2610 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2611 continue; 2612 2613 if (need_basic && basic_rates & BIT(i)) 2614 basic = 0x80; 2615 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2616 5 * (1 << shift)); 2617 *pos++ = basic | (u8) rate; 2618 } 2619 2620 return 0; 2621 } 2622 2623 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2624 struct sk_buff *skb, bool need_basic, 2625 enum nl80211_band band) 2626 { 2627 struct ieee80211_local *local = sdata->local; 2628 struct ieee80211_supported_band *sband; 2629 int rate, shift; 2630 u8 i, exrates, *pos; 2631 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2632 u32 rate_flags; 2633 2634 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2635 shift = ieee80211_vif_get_shift(&sdata->vif); 2636 2637 sband = local->hw.wiphy->bands[band]; 2638 exrates = 0; 2639 for (i = 0; i < sband->n_bitrates; i++) { 2640 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2641 continue; 2642 exrates++; 2643 } 2644 2645 if (exrates > 8) 2646 exrates -= 8; 2647 else 2648 exrates = 0; 2649 2650 if (skb_tailroom(skb) < exrates + 2) 2651 return -ENOMEM; 2652 2653 if (exrates) { 2654 pos = skb_put(skb, exrates + 2); 2655 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2656 *pos++ = exrates; 2657 for (i = 8; i < sband->n_bitrates; i++) { 2658 u8 basic = 0; 2659 if ((rate_flags & sband->bitrates[i].flags) 2660 != rate_flags) 2661 continue; 2662 if (need_basic && basic_rates & BIT(i)) 2663 basic = 0x80; 2664 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2665 5 * (1 << shift)); 2666 *pos++ = basic | (u8) rate; 2667 } 2668 } 2669 return 0; 2670 } 2671 2672 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2673 { 2674 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2676 2677 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2678 /* non-managed type inferfaces */ 2679 return 0; 2680 } 2681 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 2682 } 2683 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2684 2685 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2686 { 2687 if (!mcs) 2688 return 1; 2689 2690 /* TODO: consider rx_highest */ 2691 2692 if (mcs->rx_mask[3]) 2693 return 4; 2694 if (mcs->rx_mask[2]) 2695 return 3; 2696 if (mcs->rx_mask[1]) 2697 return 2; 2698 return 1; 2699 } 2700 2701 /** 2702 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2703 * @local: mac80211 hw info struct 2704 * @status: RX status 2705 * @mpdu_len: total MPDU length (including FCS) 2706 * @mpdu_offset: offset into MPDU to calculate timestamp at 2707 * 2708 * This function calculates the RX timestamp at the given MPDU offset, taking 2709 * into account what the RX timestamp was. An offset of 0 will just normalize 2710 * the timestamp to TSF at beginning of MPDU reception. 2711 */ 2712 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2713 struct ieee80211_rx_status *status, 2714 unsigned int mpdu_len, 2715 unsigned int mpdu_offset) 2716 { 2717 u64 ts = status->mactime; 2718 struct rate_info ri; 2719 u16 rate; 2720 2721 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2722 return 0; 2723 2724 memset(&ri, 0, sizeof(ri)); 2725 2726 /* Fill cfg80211 rate info */ 2727 switch (status->encoding) { 2728 case RX_ENC_HT: 2729 ri.mcs = status->rate_idx; 2730 ri.flags |= RATE_INFO_FLAGS_MCS; 2731 ri.bw = status->bw; 2732 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 2733 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2734 break; 2735 case RX_ENC_VHT: 2736 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2737 ri.mcs = status->rate_idx; 2738 ri.nss = status->nss; 2739 ri.bw = status->bw; 2740 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 2741 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2742 break; 2743 default: 2744 WARN_ON(1); 2745 /* fall through */ 2746 case RX_ENC_LEGACY: { 2747 struct ieee80211_supported_band *sband; 2748 int shift = 0; 2749 int bitrate; 2750 2751 ri.bw = status->bw; 2752 2753 switch (status->bw) { 2754 case RATE_INFO_BW_10: 2755 shift = 1; 2756 break; 2757 case RATE_INFO_BW_5: 2758 shift = 2; 2759 break; 2760 } 2761 2762 sband = local->hw.wiphy->bands[status->band]; 2763 bitrate = sband->bitrates[status->rate_idx].bitrate; 2764 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2765 2766 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 2767 /* TODO: handle HT/VHT preambles */ 2768 if (status->band == NL80211_BAND_5GHZ) { 2769 ts += 20 << shift; 2770 mpdu_offset += 2; 2771 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 2772 ts += 96; 2773 } else { 2774 ts += 192; 2775 } 2776 } 2777 break; 2778 } 2779 } 2780 2781 rate = cfg80211_calculate_bitrate(&ri); 2782 if (WARN_ONCE(!rate, 2783 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 2784 (unsigned long long)status->flag, status->rate_idx, 2785 status->nss)) 2786 return 0; 2787 2788 /* rewind from end of MPDU */ 2789 if (status->flag & RX_FLAG_MACTIME_END) 2790 ts -= mpdu_len * 8 * 10 / rate; 2791 2792 ts += mpdu_offset * 8 * 10 / rate; 2793 2794 return ts; 2795 } 2796 2797 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2798 { 2799 struct ieee80211_sub_if_data *sdata; 2800 struct cfg80211_chan_def chandef; 2801 2802 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 2803 ASSERT_RTNL(); 2804 2805 mutex_lock(&local->mtx); 2806 list_for_each_entry(sdata, &local->interfaces, list) { 2807 /* it might be waiting for the local->mtx, but then 2808 * by the time it gets it, sdata->wdev.cac_started 2809 * will no longer be true 2810 */ 2811 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2812 2813 if (sdata->wdev.cac_started) { 2814 chandef = sdata->vif.bss_conf.chandef; 2815 ieee80211_vif_release_channel(sdata); 2816 cfg80211_cac_event(sdata->dev, 2817 &chandef, 2818 NL80211_RADAR_CAC_ABORTED, 2819 GFP_KERNEL); 2820 } 2821 } 2822 mutex_unlock(&local->mtx); 2823 } 2824 2825 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2826 { 2827 struct ieee80211_local *local = 2828 container_of(work, struct ieee80211_local, radar_detected_work); 2829 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2830 struct ieee80211_chanctx *ctx; 2831 int num_chanctx = 0; 2832 2833 mutex_lock(&local->chanctx_mtx); 2834 list_for_each_entry(ctx, &local->chanctx_list, list) { 2835 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 2836 continue; 2837 2838 num_chanctx++; 2839 chandef = ctx->conf.def; 2840 } 2841 mutex_unlock(&local->chanctx_mtx); 2842 2843 rtnl_lock(); 2844 ieee80211_dfs_cac_cancel(local); 2845 rtnl_unlock(); 2846 2847 if (num_chanctx > 1) 2848 /* XXX: multi-channel is not supported yet */ 2849 WARN_ON(1); 2850 else 2851 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 2852 } 2853 2854 void ieee80211_radar_detected(struct ieee80211_hw *hw) 2855 { 2856 struct ieee80211_local *local = hw_to_local(hw); 2857 2858 trace_api_radar_detected(local); 2859 2860 schedule_work(&local->radar_detected_work); 2861 } 2862 EXPORT_SYMBOL(ieee80211_radar_detected); 2863 2864 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 2865 { 2866 u32 ret; 2867 int tmp; 2868 2869 switch (c->width) { 2870 case NL80211_CHAN_WIDTH_20: 2871 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2872 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2873 break; 2874 case NL80211_CHAN_WIDTH_40: 2875 c->width = NL80211_CHAN_WIDTH_20; 2876 c->center_freq1 = c->chan->center_freq; 2877 ret = IEEE80211_STA_DISABLE_40MHZ | 2878 IEEE80211_STA_DISABLE_VHT; 2879 break; 2880 case NL80211_CHAN_WIDTH_80: 2881 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 2882 /* n_P40 */ 2883 tmp /= 2; 2884 /* freq_P40 */ 2885 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 2886 c->width = NL80211_CHAN_WIDTH_40; 2887 ret = IEEE80211_STA_DISABLE_VHT; 2888 break; 2889 case NL80211_CHAN_WIDTH_80P80: 2890 c->center_freq2 = 0; 2891 c->width = NL80211_CHAN_WIDTH_80; 2892 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2893 IEEE80211_STA_DISABLE_160MHZ; 2894 break; 2895 case NL80211_CHAN_WIDTH_160: 2896 /* n_P20 */ 2897 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 2898 /* n_P80 */ 2899 tmp /= 4; 2900 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 2901 c->width = NL80211_CHAN_WIDTH_80; 2902 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2903 IEEE80211_STA_DISABLE_160MHZ; 2904 break; 2905 default: 2906 case NL80211_CHAN_WIDTH_20_NOHT: 2907 WARN_ON_ONCE(1); 2908 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2909 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2910 break; 2911 case NL80211_CHAN_WIDTH_5: 2912 case NL80211_CHAN_WIDTH_10: 2913 WARN_ON_ONCE(1); 2914 /* keep c->width */ 2915 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2916 break; 2917 } 2918 2919 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 2920 2921 return ret; 2922 } 2923 2924 /* 2925 * Returns true if smps_mode_new is strictly more restrictive than 2926 * smps_mode_old. 2927 */ 2928 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 2929 enum ieee80211_smps_mode smps_mode_new) 2930 { 2931 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 2932 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 2933 return false; 2934 2935 switch (smps_mode_old) { 2936 case IEEE80211_SMPS_STATIC: 2937 return false; 2938 case IEEE80211_SMPS_DYNAMIC: 2939 return smps_mode_new == IEEE80211_SMPS_STATIC; 2940 case IEEE80211_SMPS_OFF: 2941 return smps_mode_new != IEEE80211_SMPS_OFF; 2942 default: 2943 WARN_ON(1); 2944 } 2945 2946 return false; 2947 } 2948 2949 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 2950 struct cfg80211_csa_settings *csa_settings) 2951 { 2952 struct sk_buff *skb; 2953 struct ieee80211_mgmt *mgmt; 2954 struct ieee80211_local *local = sdata->local; 2955 int freq; 2956 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) + 2957 sizeof(mgmt->u.action.u.chan_switch); 2958 u8 *pos; 2959 2960 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 2961 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 2962 return -EOPNOTSUPP; 2963 2964 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 2965 5 + /* channel switch announcement element */ 2966 3 + /* secondary channel offset element */ 2967 8); /* mesh channel switch parameters element */ 2968 if (!skb) 2969 return -ENOMEM; 2970 2971 skb_reserve(skb, local->tx_headroom); 2972 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len); 2973 memset(mgmt, 0, hdr_len); 2974 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2975 IEEE80211_STYPE_ACTION); 2976 2977 eth_broadcast_addr(mgmt->da); 2978 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2979 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2980 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 2981 } else { 2982 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 2983 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 2984 } 2985 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 2986 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 2987 pos = skb_put(skb, 5); 2988 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 2989 *pos++ = 3; /* IE length */ 2990 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 2991 freq = csa_settings->chandef.chan->center_freq; 2992 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 2993 *pos++ = csa_settings->count; /* count */ 2994 2995 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 2996 enum nl80211_channel_type ch_type; 2997 2998 skb_put(skb, 3); 2999 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3000 *pos++ = 1; /* IE length */ 3001 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3002 if (ch_type == NL80211_CHAN_HT40PLUS) 3003 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3004 else 3005 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3006 } 3007 3008 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3009 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3010 3011 skb_put(skb, 8); 3012 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3013 *pos++ = 6; /* IE length */ 3014 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3015 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3016 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3017 *pos++ |= csa_settings->block_tx ? 3018 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3019 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3020 pos += 2; 3021 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3022 pos += 2; 3023 } 3024 3025 ieee80211_tx_skb(sdata, skb); 3026 return 0; 3027 } 3028 3029 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3030 { 3031 return !(cs == NULL || cs->cipher == 0 || 3032 cs->hdr_len < cs->pn_len + cs->pn_off || 3033 cs->hdr_len <= cs->key_idx_off || 3034 cs->key_idx_shift > 7 || 3035 cs->key_idx_mask == 0); 3036 } 3037 3038 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3039 { 3040 int i; 3041 3042 /* Ensure we have enough iftype bitmap space for all iftype values */ 3043 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3044 3045 for (i = 0; i < n; i++) 3046 if (!ieee80211_cs_valid(&cs[i])) 3047 return false; 3048 3049 return true; 3050 } 3051 3052 const struct ieee80211_cipher_scheme * 3053 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3054 enum nl80211_iftype iftype) 3055 { 3056 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3057 int n = local->hw.n_cipher_schemes; 3058 int i; 3059 const struct ieee80211_cipher_scheme *cs = NULL; 3060 3061 for (i = 0; i < n; i++) { 3062 if (l[i].cipher == cipher) { 3063 cs = &l[i]; 3064 break; 3065 } 3066 } 3067 3068 if (!cs || !(cs->iftype & BIT(iftype))) 3069 return NULL; 3070 3071 return cs; 3072 } 3073 3074 int ieee80211_cs_headroom(struct ieee80211_local *local, 3075 struct cfg80211_crypto_settings *crypto, 3076 enum nl80211_iftype iftype) 3077 { 3078 const struct ieee80211_cipher_scheme *cs; 3079 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3080 int i; 3081 3082 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3083 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3084 iftype); 3085 3086 if (cs && headroom < cs->hdr_len) 3087 headroom = cs->hdr_len; 3088 } 3089 3090 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3091 if (cs && headroom < cs->hdr_len) 3092 headroom = cs->hdr_len; 3093 3094 return headroom; 3095 } 3096 3097 static bool 3098 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3099 { 3100 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3101 int skip; 3102 3103 if (end > 0) 3104 return false; 3105 3106 /* One shot NOA */ 3107 if (data->count[i] == 1) 3108 return false; 3109 3110 if (data->desc[i].interval == 0) 3111 return false; 3112 3113 /* End time is in the past, check for repetitions */ 3114 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3115 if (data->count[i] < 255) { 3116 if (data->count[i] <= skip) { 3117 data->count[i] = 0; 3118 return false; 3119 } 3120 3121 data->count[i] -= skip; 3122 } 3123 3124 data->desc[i].start += skip * data->desc[i].interval; 3125 3126 return true; 3127 } 3128 3129 static bool 3130 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3131 s32 *offset) 3132 { 3133 bool ret = false; 3134 int i; 3135 3136 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3137 s32 cur; 3138 3139 if (!data->count[i]) 3140 continue; 3141 3142 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3143 ret = true; 3144 3145 cur = data->desc[i].start - tsf; 3146 if (cur > *offset) 3147 continue; 3148 3149 cur = data->desc[i].start + data->desc[i].duration - tsf; 3150 if (cur > *offset) 3151 *offset = cur; 3152 } 3153 3154 return ret; 3155 } 3156 3157 static u32 3158 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3159 { 3160 s32 offset = 0; 3161 int tries = 0; 3162 /* 3163 * arbitrary limit, used to avoid infinite loops when combined NoA 3164 * descriptors cover the full time period. 3165 */ 3166 int max_tries = 5; 3167 3168 ieee80211_extend_absent_time(data, tsf, &offset); 3169 do { 3170 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3171 break; 3172 3173 tries++; 3174 } while (tries < max_tries); 3175 3176 return offset; 3177 } 3178 3179 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3180 { 3181 u32 next_offset = BIT(31) - 1; 3182 int i; 3183 3184 data->absent = 0; 3185 data->has_next_tsf = false; 3186 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3187 s32 start; 3188 3189 if (!data->count[i]) 3190 continue; 3191 3192 ieee80211_extend_noa_desc(data, tsf, i); 3193 start = data->desc[i].start - tsf; 3194 if (start <= 0) 3195 data->absent |= BIT(i); 3196 3197 if (next_offset > start) 3198 next_offset = start; 3199 3200 data->has_next_tsf = true; 3201 } 3202 3203 if (data->absent) 3204 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3205 3206 data->next_tsf = tsf + next_offset; 3207 } 3208 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3209 3210 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3211 struct ieee80211_noa_data *data, u32 tsf) 3212 { 3213 int ret = 0; 3214 int i; 3215 3216 memset(data, 0, sizeof(*data)); 3217 3218 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3219 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3220 3221 if (!desc->count || !desc->duration) 3222 continue; 3223 3224 data->count[i] = desc->count; 3225 data->desc[i].start = le32_to_cpu(desc->start_time); 3226 data->desc[i].duration = le32_to_cpu(desc->duration); 3227 data->desc[i].interval = le32_to_cpu(desc->interval); 3228 3229 if (data->count[i] > 1 && 3230 data->desc[i].interval < data->desc[i].duration) 3231 continue; 3232 3233 ieee80211_extend_noa_desc(data, tsf, i); 3234 ret++; 3235 } 3236 3237 if (ret) 3238 ieee80211_update_p2p_noa(data, tsf); 3239 3240 return ret; 3241 } 3242 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3243 3244 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3245 struct ieee80211_sub_if_data *sdata) 3246 { 3247 u64 tsf = drv_get_tsf(local, sdata); 3248 u64 dtim_count = 0; 3249 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3250 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3251 struct ps_data *ps; 3252 u8 bcns_from_dtim; 3253 3254 if (tsf == -1ULL || !beacon_int || !dtim_period) 3255 return; 3256 3257 if (sdata->vif.type == NL80211_IFTYPE_AP || 3258 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3259 if (!sdata->bss) 3260 return; 3261 3262 ps = &sdata->bss->ps; 3263 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3264 ps = &sdata->u.mesh.ps; 3265 } else { 3266 return; 3267 } 3268 3269 /* 3270 * actually finds last dtim_count, mac80211 will update in 3271 * __beacon_add_tim(). 3272 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3273 */ 3274 do_div(tsf, beacon_int); 3275 bcns_from_dtim = do_div(tsf, dtim_period); 3276 /* just had a DTIM */ 3277 if (!bcns_from_dtim) 3278 dtim_count = 0; 3279 else 3280 dtim_count = dtim_period - bcns_from_dtim; 3281 3282 ps->dtim_count = dtim_count; 3283 } 3284 3285 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3286 struct ieee80211_chanctx *ctx) 3287 { 3288 struct ieee80211_sub_if_data *sdata; 3289 u8 radar_detect = 0; 3290 3291 lockdep_assert_held(&local->chanctx_mtx); 3292 3293 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3294 return 0; 3295 3296 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3297 if (sdata->reserved_radar_required) 3298 radar_detect |= BIT(sdata->reserved_chandef.width); 3299 3300 /* 3301 * An in-place reservation context should not have any assigned vifs 3302 * until it replaces the other context. 3303 */ 3304 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3305 !list_empty(&ctx->assigned_vifs)); 3306 3307 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3308 if (sdata->radar_required) 3309 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3310 3311 return radar_detect; 3312 } 3313 3314 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3315 const struct cfg80211_chan_def *chandef, 3316 enum ieee80211_chanctx_mode chanmode, 3317 u8 radar_detect) 3318 { 3319 struct ieee80211_local *local = sdata->local; 3320 struct ieee80211_sub_if_data *sdata_iter; 3321 enum nl80211_iftype iftype = sdata->wdev.iftype; 3322 struct ieee80211_chanctx *ctx; 3323 int total = 1; 3324 struct iface_combination_params params = { 3325 .radar_detect = radar_detect, 3326 }; 3327 3328 lockdep_assert_held(&local->chanctx_mtx); 3329 3330 if (WARN_ON(hweight32(radar_detect) > 1)) 3331 return -EINVAL; 3332 3333 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3334 !chandef->chan)) 3335 return -EINVAL; 3336 3337 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3338 return -EINVAL; 3339 3340 if (sdata->vif.type == NL80211_IFTYPE_AP || 3341 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3342 /* 3343 * always passing this is harmless, since it'll be the 3344 * same value that cfg80211 finds if it finds the same 3345 * interface ... and that's always allowed 3346 */ 3347 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3348 } 3349 3350 /* Always allow software iftypes */ 3351 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3352 if (radar_detect) 3353 return -EINVAL; 3354 return 0; 3355 } 3356 3357 if (chandef) 3358 params.num_different_channels = 1; 3359 3360 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3361 params.iftype_num[iftype] = 1; 3362 3363 list_for_each_entry(ctx, &local->chanctx_list, list) { 3364 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3365 continue; 3366 params.radar_detect |= 3367 ieee80211_chanctx_radar_detect(local, ctx); 3368 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3369 params.num_different_channels++; 3370 continue; 3371 } 3372 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3373 cfg80211_chandef_compatible(chandef, 3374 &ctx->conf.def)) 3375 continue; 3376 params.num_different_channels++; 3377 } 3378 3379 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3380 struct wireless_dev *wdev_iter; 3381 3382 wdev_iter = &sdata_iter->wdev; 3383 3384 if (sdata_iter == sdata || 3385 !ieee80211_sdata_running(sdata_iter) || 3386 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3387 continue; 3388 3389 params.iftype_num[wdev_iter->iftype]++; 3390 total++; 3391 } 3392 3393 if (total == 1 && !params.radar_detect) 3394 return 0; 3395 3396 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3397 } 3398 3399 static void 3400 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3401 void *data) 3402 { 3403 u32 *max_num_different_channels = data; 3404 3405 *max_num_different_channels = max(*max_num_different_channels, 3406 c->num_different_channels); 3407 } 3408 3409 int ieee80211_max_num_channels(struct ieee80211_local *local) 3410 { 3411 struct ieee80211_sub_if_data *sdata; 3412 struct ieee80211_chanctx *ctx; 3413 u32 max_num_different_channels = 1; 3414 int err; 3415 struct iface_combination_params params = {0}; 3416 3417 lockdep_assert_held(&local->chanctx_mtx); 3418 3419 list_for_each_entry(ctx, &local->chanctx_list, list) { 3420 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3421 continue; 3422 3423 params.num_different_channels++; 3424 3425 params.radar_detect |= 3426 ieee80211_chanctx_radar_detect(local, ctx); 3427 } 3428 3429 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3430 params.iftype_num[sdata->wdev.iftype]++; 3431 3432 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3433 ieee80211_iter_max_chans, 3434 &max_num_different_channels); 3435 if (err < 0) 3436 return err; 3437 3438 return max_num_different_channels; 3439 } 3440 3441 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3442 { 3443 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3444 *buf++ = 7; /* len */ 3445 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3446 *buf++ = 0x50; 3447 *buf++ = 0xf2; 3448 *buf++ = 2; /* WME */ 3449 *buf++ = 0; /* WME info */ 3450 *buf++ = 1; /* WME ver */ 3451 *buf++ = qosinfo; /* U-APSD no in use */ 3452 3453 return buf; 3454 } 3455 3456 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3457 unsigned long *frame_cnt, 3458 unsigned long *byte_cnt) 3459 { 3460 struct txq_info *txqi = to_txq_info(txq); 3461 u32 frag_cnt = 0, frag_bytes = 0; 3462 struct sk_buff *skb; 3463 3464 skb_queue_walk(&txqi->frags, skb) { 3465 frag_cnt++; 3466 frag_bytes += skb->len; 3467 } 3468 3469 if (frame_cnt) 3470 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 3471 3472 if (byte_cnt) 3473 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 3474 } 3475 EXPORT_SYMBOL(ieee80211_txq_get_depth); 3476 3477 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 3478 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 3479 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 3480 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 3481 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 3482 }; 3483