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 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * utilities for mac80211 13 */ 14 15 #include <net/mac80211.h> 16 #include <linux/netdevice.h> 17 #include <linux/export.h> 18 #include <linux/types.h> 19 #include <linux/slab.h> 20 #include <linux/skbuff.h> 21 #include <linux/etherdevice.h> 22 #include <linux/if_arp.h> 23 #include <linux/bitmap.h> 24 #include <linux/crc32.h> 25 #include <net/net_namespace.h> 26 #include <net/cfg80211.h> 27 #include <net/rtnetlink.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "mesh.h" 33 #include "wme.h" 34 #include "led.h" 35 #include "wep.h" 36 37 /* privid for wiphys to determine whether they belong to us or not */ 38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 39 40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 41 { 42 struct ieee80211_local *local; 43 BUG_ON(!wiphy); 44 45 local = wiphy_priv(wiphy); 46 return &local->hw; 47 } 48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 49 50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, 51 enum nl80211_iftype type) 52 { 53 __le16 fc = hdr->frame_control; 54 55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ 56 if (len < 16) 57 return NULL; 58 59 if (ieee80211_is_data(fc)) { 60 if (len < 24) /* drop incorrect hdr len (data) */ 61 return NULL; 62 63 if (ieee80211_has_a4(fc)) 64 return NULL; 65 if (ieee80211_has_tods(fc)) 66 return hdr->addr1; 67 if (ieee80211_has_fromds(fc)) 68 return hdr->addr2; 69 70 return hdr->addr3; 71 } 72 73 if (ieee80211_is_mgmt(fc)) { 74 if (len < 24) /* drop incorrect hdr len (mgmt) */ 75 return NULL; 76 return hdr->addr3; 77 } 78 79 if (ieee80211_is_ctl(fc)) { 80 if (ieee80211_is_pspoll(fc)) 81 return hdr->addr1; 82 83 if (ieee80211_is_back_req(fc)) { 84 switch (type) { 85 case NL80211_IFTYPE_STATION: 86 return hdr->addr2; 87 case NL80211_IFTYPE_AP: 88 case NL80211_IFTYPE_AP_VLAN: 89 return hdr->addr1; 90 default: 91 break; /* fall through to the return */ 92 } 93 } 94 } 95 96 return NULL; 97 } 98 99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 100 { 101 struct sk_buff *skb; 102 struct ieee80211_hdr *hdr; 103 104 skb_queue_walk(&tx->skbs, skb) { 105 hdr = (struct ieee80211_hdr *) skb->data; 106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 107 } 108 } 109 110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len, 111 int rate, int erp, int short_preamble, 112 int shift) 113 { 114 int dur; 115 116 /* calculate duration (in microseconds, rounded up to next higher 117 * integer if it includes a fractional microsecond) to send frame of 118 * len bytes (does not include FCS) at the given rate. Duration will 119 * also include SIFS. 120 * 121 * rate is in 100 kbps, so divident is multiplied by 10 in the 122 * DIV_ROUND_UP() operations. 123 * 124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 125 * is assumed to be 0 otherwise. 126 */ 127 128 if (band == IEEE80211_BAND_5GHZ || erp) { 129 /* 130 * OFDM: 131 * 132 * N_DBPS = DATARATE x 4 133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 134 * (16 = SIGNAL time, 6 = tail bits) 135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 136 * 137 * T_SYM = 4 usec 138 * 802.11a - 18.5.2: aSIFSTime = 16 usec 139 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 140 * signal ext = 6 usec 141 */ 142 dur = 16; /* SIFS + signal ext */ 143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 145 146 /* IEEE 802.11-2012 18.3.2.4: all values above are: 147 * * times 4 for 5 MHz 148 * * times 2 for 10 MHz 149 */ 150 dur *= 1 << shift; 151 152 /* rates should already consider the channel bandwidth, 153 * don't apply divisor again. 154 */ 155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 156 4 * rate); /* T_SYM x N_SYM */ 157 } else { 158 /* 159 * 802.11b or 802.11g with 802.11b compatibility: 160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 162 * 163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 164 * aSIFSTime = 10 usec 165 * aPreambleLength = 144 usec or 72 usec with short preamble 166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 167 */ 168 dur = 10; /* aSIFSTime = 10 usec */ 169 dur += short_preamble ? (72 + 24) : (144 + 48); 170 171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 172 } 173 174 return dur; 175 } 176 177 /* Exported duration function for driver use */ 178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 179 struct ieee80211_vif *vif, 180 enum ieee80211_band band, 181 size_t frame_len, 182 struct ieee80211_rate *rate) 183 { 184 struct ieee80211_sub_if_data *sdata; 185 u16 dur; 186 int erp, shift = 0; 187 bool short_preamble = false; 188 189 erp = 0; 190 if (vif) { 191 sdata = vif_to_sdata(vif); 192 short_preamble = sdata->vif.bss_conf.use_short_preamble; 193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 194 erp = rate->flags & IEEE80211_RATE_ERP_G; 195 shift = ieee80211_vif_get_shift(vif); 196 } 197 198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 199 short_preamble, shift); 200 201 return cpu_to_le16(dur); 202 } 203 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 204 205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 206 struct ieee80211_vif *vif, size_t frame_len, 207 const struct ieee80211_tx_info *frame_txctl) 208 { 209 struct ieee80211_local *local = hw_to_local(hw); 210 struct ieee80211_rate *rate; 211 struct ieee80211_sub_if_data *sdata; 212 bool short_preamble; 213 int erp, shift = 0, bitrate; 214 u16 dur; 215 struct ieee80211_supported_band *sband; 216 217 sband = local->hw.wiphy->bands[frame_txctl->band]; 218 219 short_preamble = false; 220 221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 222 223 erp = 0; 224 if (vif) { 225 sdata = vif_to_sdata(vif); 226 short_preamble = sdata->vif.bss_conf.use_short_preamble; 227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 228 erp = rate->flags & IEEE80211_RATE_ERP_G; 229 shift = ieee80211_vif_get_shift(vif); 230 } 231 232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 233 234 /* CTS duration */ 235 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 236 erp, short_preamble, shift); 237 /* Data frame duration */ 238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 239 erp, short_preamble, shift); 240 /* ACK duration */ 241 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 242 erp, short_preamble, shift); 243 244 return cpu_to_le16(dur); 245 } 246 EXPORT_SYMBOL(ieee80211_rts_duration); 247 248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 249 struct ieee80211_vif *vif, 250 size_t frame_len, 251 const struct ieee80211_tx_info *frame_txctl) 252 { 253 struct ieee80211_local *local = hw_to_local(hw); 254 struct ieee80211_rate *rate; 255 struct ieee80211_sub_if_data *sdata; 256 bool short_preamble; 257 int erp, shift = 0, bitrate; 258 u16 dur; 259 struct ieee80211_supported_band *sband; 260 261 sband = local->hw.wiphy->bands[frame_txctl->band]; 262 263 short_preamble = false; 264 265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 266 erp = 0; 267 if (vif) { 268 sdata = vif_to_sdata(vif); 269 short_preamble = sdata->vif.bss_conf.use_short_preamble; 270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 271 erp = rate->flags & IEEE80211_RATE_ERP_G; 272 shift = ieee80211_vif_get_shift(vif); 273 } 274 275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 276 277 /* Data frame duration */ 278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 279 erp, short_preamble, shift); 280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 281 /* ACK duration */ 282 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 283 erp, short_preamble, shift); 284 } 285 286 return cpu_to_le16(dur); 287 } 288 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 289 290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 291 { 292 struct ieee80211_sub_if_data *sdata; 293 int n_acs = IEEE80211_NUM_ACS; 294 295 if (local->hw.queues < IEEE80211_NUM_ACS) 296 n_acs = 1; 297 298 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 299 int ac; 300 301 if (!sdata->dev) 302 continue; 303 304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 306 continue; 307 308 for (ac = 0; ac < n_acs; ac++) { 309 int ac_queue = sdata->vif.hw_queue[ac]; 310 311 if (ac_queue == queue || 312 (sdata->vif.cab_queue == queue && 313 local->queue_stop_reasons[ac_queue] == 0 && 314 skb_queue_empty(&local->pending[ac_queue]))) 315 netif_wake_subqueue(sdata->dev, ac); 316 } 317 } 318 } 319 320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 321 enum queue_stop_reason reason, 322 bool refcounted) 323 { 324 struct ieee80211_local *local = hw_to_local(hw); 325 326 trace_wake_queue(local, queue, reason); 327 328 if (WARN_ON(queue >= hw->queues)) 329 return; 330 331 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 332 return; 333 334 if (!refcounted) 335 local->q_stop_reasons[queue][reason] = 0; 336 else 337 local->q_stop_reasons[queue][reason]--; 338 339 if (local->q_stop_reasons[queue][reason] == 0) 340 __clear_bit(reason, &local->queue_stop_reasons[queue]); 341 342 if (local->queue_stop_reasons[queue] != 0) 343 /* someone still has this queue stopped */ 344 return; 345 346 if (skb_queue_empty(&local->pending[queue])) { 347 rcu_read_lock(); 348 ieee80211_propagate_queue_wake(local, queue); 349 rcu_read_unlock(); 350 } else 351 tasklet_schedule(&local->tx_pending_tasklet); 352 } 353 354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 355 enum queue_stop_reason reason, 356 bool refcounted) 357 { 358 struct ieee80211_local *local = hw_to_local(hw); 359 unsigned long flags; 360 361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 362 __ieee80211_wake_queue(hw, queue, reason, refcounted); 363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 364 } 365 366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 367 { 368 ieee80211_wake_queue_by_reason(hw, queue, 369 IEEE80211_QUEUE_STOP_REASON_DRIVER, 370 false); 371 } 372 EXPORT_SYMBOL(ieee80211_wake_queue); 373 374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 375 enum queue_stop_reason reason, 376 bool refcounted) 377 { 378 struct ieee80211_local *local = hw_to_local(hw); 379 struct ieee80211_sub_if_data *sdata; 380 int n_acs = IEEE80211_NUM_ACS; 381 382 trace_stop_queue(local, queue, reason); 383 384 if (WARN_ON(queue >= hw->queues)) 385 return; 386 387 if (!refcounted) 388 local->q_stop_reasons[queue][reason] = 1; 389 else 390 local->q_stop_reasons[queue][reason]++; 391 392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 393 return; 394 395 if (local->hw.queues < IEEE80211_NUM_ACS) 396 n_acs = 1; 397 398 rcu_read_lock(); 399 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 400 int ac; 401 402 if (!sdata->dev) 403 continue; 404 405 for (ac = 0; ac < n_acs; ac++) { 406 if (sdata->vif.hw_queue[ac] == queue || 407 sdata->vif.cab_queue == queue) 408 netif_stop_subqueue(sdata->dev, ac); 409 } 410 } 411 rcu_read_unlock(); 412 } 413 414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 415 enum queue_stop_reason reason, 416 bool refcounted) 417 { 418 struct ieee80211_local *local = hw_to_local(hw); 419 unsigned long flags; 420 421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 422 __ieee80211_stop_queue(hw, queue, reason, refcounted); 423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 424 } 425 426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 427 { 428 ieee80211_stop_queue_by_reason(hw, queue, 429 IEEE80211_QUEUE_STOP_REASON_DRIVER, 430 false); 431 } 432 EXPORT_SYMBOL(ieee80211_stop_queue); 433 434 void ieee80211_add_pending_skb(struct ieee80211_local *local, 435 struct sk_buff *skb) 436 { 437 struct ieee80211_hw *hw = &local->hw; 438 unsigned long flags; 439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 440 int queue = info->hw_queue; 441 442 if (WARN_ON(!info->control.vif)) { 443 ieee80211_free_txskb(&local->hw, skb); 444 return; 445 } 446 447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 449 false); 450 __skb_queue_tail(&local->pending[queue], skb); 451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 452 false); 453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 454 } 455 456 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 457 struct sk_buff_head *skbs) 458 { 459 struct ieee80211_hw *hw = &local->hw; 460 struct sk_buff *skb; 461 unsigned long flags; 462 int queue, i; 463 464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 465 while ((skb = skb_dequeue(skbs))) { 466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 467 468 if (WARN_ON(!info->control.vif)) { 469 ieee80211_free_txskb(&local->hw, skb); 470 continue; 471 } 472 473 queue = info->hw_queue; 474 475 __ieee80211_stop_queue(hw, queue, 476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 477 false); 478 479 __skb_queue_tail(&local->pending[queue], skb); 480 } 481 482 for (i = 0; i < hw->queues; i++) 483 __ieee80211_wake_queue(hw, i, 484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 485 false); 486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 487 } 488 489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 490 unsigned long queues, 491 enum queue_stop_reason reason, 492 bool refcounted) 493 { 494 struct ieee80211_local *local = hw_to_local(hw); 495 unsigned long flags; 496 int i; 497 498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 499 500 for_each_set_bit(i, &queues, hw->queues) 501 __ieee80211_stop_queue(hw, i, reason, refcounted); 502 503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 504 } 505 506 void ieee80211_stop_queues(struct ieee80211_hw *hw) 507 { 508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 509 IEEE80211_QUEUE_STOP_REASON_DRIVER, 510 false); 511 } 512 EXPORT_SYMBOL(ieee80211_stop_queues); 513 514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 515 { 516 struct ieee80211_local *local = hw_to_local(hw); 517 unsigned long flags; 518 int ret; 519 520 if (WARN_ON(queue >= hw->queues)) 521 return true; 522 523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 525 &local->queue_stop_reasons[queue]); 526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 527 return ret; 528 } 529 EXPORT_SYMBOL(ieee80211_queue_stopped); 530 531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 532 unsigned long queues, 533 enum queue_stop_reason reason, 534 bool refcounted) 535 { 536 struct ieee80211_local *local = hw_to_local(hw); 537 unsigned long flags; 538 int i; 539 540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 541 542 for_each_set_bit(i, &queues, hw->queues) 543 __ieee80211_wake_queue(hw, i, reason, refcounted); 544 545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 546 } 547 548 void ieee80211_wake_queues(struct ieee80211_hw *hw) 549 { 550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 551 IEEE80211_QUEUE_STOP_REASON_DRIVER, 552 false); 553 } 554 EXPORT_SYMBOL(ieee80211_wake_queues); 555 556 static unsigned int 557 ieee80211_get_vif_queues(struct ieee80211_local *local, 558 struct ieee80211_sub_if_data *sdata) 559 { 560 unsigned int queues; 561 562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { 563 int ac; 564 565 queues = 0; 566 567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 568 queues |= BIT(sdata->vif.hw_queue[ac]); 569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 570 queues |= BIT(sdata->vif.cab_queue); 571 } else { 572 /* all queues */ 573 queues = BIT(local->hw.queues) - 1; 574 } 575 576 return queues; 577 } 578 579 void __ieee80211_flush_queues(struct ieee80211_local *local, 580 struct ieee80211_sub_if_data *sdata, 581 unsigned int queues, bool drop) 582 { 583 if (!local->ops->flush) 584 return; 585 586 /* 587 * If no queue was set, or if the HW doesn't support 588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 589 */ 590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) 591 queues = ieee80211_get_vif_queues(local, sdata); 592 593 ieee80211_stop_queues_by_reason(&local->hw, queues, 594 IEEE80211_QUEUE_STOP_REASON_FLUSH, 595 false); 596 597 drv_flush(local, sdata, queues, drop); 598 599 ieee80211_wake_queues_by_reason(&local->hw, queues, 600 IEEE80211_QUEUE_STOP_REASON_FLUSH, 601 false); 602 } 603 604 void ieee80211_flush_queues(struct ieee80211_local *local, 605 struct ieee80211_sub_if_data *sdata, bool drop) 606 { 607 __ieee80211_flush_queues(local, sdata, 0, drop); 608 } 609 610 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 611 struct ieee80211_sub_if_data *sdata, 612 enum queue_stop_reason reason) 613 { 614 ieee80211_stop_queues_by_reason(&local->hw, 615 ieee80211_get_vif_queues(local, sdata), 616 reason, true); 617 } 618 619 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 620 struct ieee80211_sub_if_data *sdata, 621 enum queue_stop_reason reason) 622 { 623 ieee80211_wake_queues_by_reason(&local->hw, 624 ieee80211_get_vif_queues(local, sdata), 625 reason, true); 626 } 627 628 static void __iterate_active_interfaces(struct ieee80211_local *local, 629 u32 iter_flags, 630 void (*iterator)(void *data, u8 *mac, 631 struct ieee80211_vif *vif), 632 void *data) 633 { 634 struct ieee80211_sub_if_data *sdata; 635 636 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 637 switch (sdata->vif.type) { 638 case NL80211_IFTYPE_MONITOR: 639 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) 640 continue; 641 break; 642 case NL80211_IFTYPE_AP_VLAN: 643 continue; 644 default: 645 break; 646 } 647 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 648 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 649 continue; 650 if (ieee80211_sdata_running(sdata)) 651 iterator(data, sdata->vif.addr, 652 &sdata->vif); 653 } 654 655 sdata = rcu_dereference_check(local->monitor_sdata, 656 lockdep_is_held(&local->iflist_mtx) || 657 lockdep_rtnl_is_held()); 658 if (sdata && 659 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || 660 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 661 iterator(data, sdata->vif.addr, &sdata->vif); 662 } 663 664 void ieee80211_iterate_active_interfaces( 665 struct ieee80211_hw *hw, u32 iter_flags, 666 void (*iterator)(void *data, u8 *mac, 667 struct ieee80211_vif *vif), 668 void *data) 669 { 670 struct ieee80211_local *local = hw_to_local(hw); 671 672 mutex_lock(&local->iflist_mtx); 673 __iterate_active_interfaces(local, iter_flags, iterator, data); 674 mutex_unlock(&local->iflist_mtx); 675 } 676 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); 677 678 void ieee80211_iterate_active_interfaces_atomic( 679 struct ieee80211_hw *hw, u32 iter_flags, 680 void (*iterator)(void *data, u8 *mac, 681 struct ieee80211_vif *vif), 682 void *data) 683 { 684 struct ieee80211_local *local = hw_to_local(hw); 685 686 rcu_read_lock(); 687 __iterate_active_interfaces(local, iter_flags, iterator, data); 688 rcu_read_unlock(); 689 } 690 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 691 692 void ieee80211_iterate_active_interfaces_rtnl( 693 struct ieee80211_hw *hw, u32 iter_flags, 694 void (*iterator)(void *data, u8 *mac, 695 struct ieee80211_vif *vif), 696 void *data) 697 { 698 struct ieee80211_local *local = hw_to_local(hw); 699 700 ASSERT_RTNL(); 701 702 __iterate_active_interfaces(local, iter_flags, iterator, data); 703 } 704 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 705 706 static void __iterate_stations(struct ieee80211_local *local, 707 void (*iterator)(void *data, 708 struct ieee80211_sta *sta), 709 void *data) 710 { 711 struct sta_info *sta; 712 713 list_for_each_entry_rcu(sta, &local->sta_list, list) { 714 if (!sta->uploaded) 715 continue; 716 717 iterator(data, &sta->sta); 718 } 719 } 720 721 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 722 void (*iterator)(void *data, 723 struct ieee80211_sta *sta), 724 void *data) 725 { 726 struct ieee80211_local *local = hw_to_local(hw); 727 728 rcu_read_lock(); 729 __iterate_stations(local, iterator, data); 730 rcu_read_unlock(); 731 } 732 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 733 734 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 735 { 736 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 737 738 if (!ieee80211_sdata_running(sdata) || 739 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 740 return NULL; 741 return &sdata->vif; 742 } 743 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 744 745 /* 746 * Nothing should have been stuffed into the workqueue during 747 * the suspend->resume cycle. Since we can't check each caller 748 * of this function if we are already quiescing / suspended, 749 * check here and don't WARN since this can actually happen when 750 * the rx path (for example) is racing against __ieee80211_suspend 751 * and suspending / quiescing was set after the rx path checked 752 * them. 753 */ 754 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 755 { 756 if (local->quiescing || (local->suspended && !local->resuming)) { 757 pr_warn("queueing ieee80211 work while going to suspend\n"); 758 return false; 759 } 760 761 return true; 762 } 763 764 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 765 { 766 struct ieee80211_local *local = hw_to_local(hw); 767 768 if (!ieee80211_can_queue_work(local)) 769 return; 770 771 queue_work(local->workqueue, work); 772 } 773 EXPORT_SYMBOL(ieee80211_queue_work); 774 775 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 776 struct delayed_work *dwork, 777 unsigned long delay) 778 { 779 struct ieee80211_local *local = hw_to_local(hw); 780 781 if (!ieee80211_can_queue_work(local)) 782 return; 783 784 queue_delayed_work(local->workqueue, dwork, delay); 785 } 786 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 787 788 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 789 struct ieee802_11_elems *elems, 790 u64 filter, u32 crc) 791 { 792 size_t left = len; 793 const u8 *pos = start; 794 bool calc_crc = filter != 0; 795 DECLARE_BITMAP(seen_elems, 256); 796 const u8 *ie; 797 798 bitmap_zero(seen_elems, 256); 799 memset(elems, 0, sizeof(*elems)); 800 elems->ie_start = start; 801 elems->total_len = len; 802 803 while (left >= 2) { 804 u8 id, elen; 805 bool elem_parse_failed; 806 807 id = *pos++; 808 elen = *pos++; 809 left -= 2; 810 811 if (elen > left) { 812 elems->parse_error = true; 813 break; 814 } 815 816 switch (id) { 817 case WLAN_EID_SSID: 818 case WLAN_EID_SUPP_RATES: 819 case WLAN_EID_FH_PARAMS: 820 case WLAN_EID_DS_PARAMS: 821 case WLAN_EID_CF_PARAMS: 822 case WLAN_EID_TIM: 823 case WLAN_EID_IBSS_PARAMS: 824 case WLAN_EID_CHALLENGE: 825 case WLAN_EID_RSN: 826 case WLAN_EID_ERP_INFO: 827 case WLAN_EID_EXT_SUPP_RATES: 828 case WLAN_EID_HT_CAPABILITY: 829 case WLAN_EID_HT_OPERATION: 830 case WLAN_EID_VHT_CAPABILITY: 831 case WLAN_EID_VHT_OPERATION: 832 case WLAN_EID_MESH_ID: 833 case WLAN_EID_MESH_CONFIG: 834 case WLAN_EID_PEER_MGMT: 835 case WLAN_EID_PREQ: 836 case WLAN_EID_PREP: 837 case WLAN_EID_PERR: 838 case WLAN_EID_RANN: 839 case WLAN_EID_CHANNEL_SWITCH: 840 case WLAN_EID_EXT_CHANSWITCH_ANN: 841 case WLAN_EID_COUNTRY: 842 case WLAN_EID_PWR_CONSTRAINT: 843 case WLAN_EID_TIMEOUT_INTERVAL: 844 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 845 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 846 case WLAN_EID_CHAN_SWITCH_PARAM: 847 case WLAN_EID_EXT_CAPABILITY: 848 case WLAN_EID_CHAN_SWITCH_TIMING: 849 case WLAN_EID_LINK_ID: 850 /* 851 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 852 * that if the content gets bigger it might be needed more than once 853 */ 854 if (test_bit(id, seen_elems)) { 855 elems->parse_error = true; 856 left -= elen; 857 pos += elen; 858 continue; 859 } 860 break; 861 } 862 863 if (calc_crc && id < 64 && (filter & (1ULL << id))) 864 crc = crc32_be(crc, pos - 2, elen + 2); 865 866 elem_parse_failed = false; 867 868 switch (id) { 869 case WLAN_EID_LINK_ID: 870 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 871 elem_parse_failed = true; 872 break; 873 } 874 elems->lnk_id = (void *)(pos - 2); 875 break; 876 case WLAN_EID_CHAN_SWITCH_TIMING: 877 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 878 elem_parse_failed = true; 879 break; 880 } 881 elems->ch_sw_timing = (void *)pos; 882 break; 883 case WLAN_EID_EXT_CAPABILITY: 884 elems->ext_capab = pos; 885 elems->ext_capab_len = elen; 886 break; 887 case WLAN_EID_SSID: 888 elems->ssid = pos; 889 elems->ssid_len = elen; 890 break; 891 case WLAN_EID_SUPP_RATES: 892 elems->supp_rates = pos; 893 elems->supp_rates_len = elen; 894 break; 895 case WLAN_EID_DS_PARAMS: 896 if (elen >= 1) 897 elems->ds_params = pos; 898 else 899 elem_parse_failed = true; 900 break; 901 case WLAN_EID_TIM: 902 if (elen >= sizeof(struct ieee80211_tim_ie)) { 903 elems->tim = (void *)pos; 904 elems->tim_len = elen; 905 } else 906 elem_parse_failed = true; 907 break; 908 case WLAN_EID_CHALLENGE: 909 elems->challenge = pos; 910 elems->challenge_len = elen; 911 break; 912 case WLAN_EID_VENDOR_SPECIFIC: 913 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 914 pos[2] == 0xf2) { 915 /* Microsoft OUI (00:50:F2) */ 916 917 if (calc_crc) 918 crc = crc32_be(crc, pos - 2, elen + 2); 919 920 if (elen >= 5 && pos[3] == 2) { 921 /* OUI Type 2 - WMM IE */ 922 if (pos[4] == 0) { 923 elems->wmm_info = pos; 924 elems->wmm_info_len = elen; 925 } else if (pos[4] == 1) { 926 elems->wmm_param = pos; 927 elems->wmm_param_len = elen; 928 } 929 } 930 } 931 break; 932 case WLAN_EID_RSN: 933 elems->rsn = pos; 934 elems->rsn_len = elen; 935 break; 936 case WLAN_EID_ERP_INFO: 937 if (elen >= 1) 938 elems->erp_info = pos; 939 else 940 elem_parse_failed = true; 941 break; 942 case WLAN_EID_EXT_SUPP_RATES: 943 elems->ext_supp_rates = pos; 944 elems->ext_supp_rates_len = elen; 945 break; 946 case WLAN_EID_HT_CAPABILITY: 947 if (elen >= sizeof(struct ieee80211_ht_cap)) 948 elems->ht_cap_elem = (void *)pos; 949 else 950 elem_parse_failed = true; 951 break; 952 case WLAN_EID_HT_OPERATION: 953 if (elen >= sizeof(struct ieee80211_ht_operation)) 954 elems->ht_operation = (void *)pos; 955 else 956 elem_parse_failed = true; 957 break; 958 case WLAN_EID_VHT_CAPABILITY: 959 if (elen >= sizeof(struct ieee80211_vht_cap)) 960 elems->vht_cap_elem = (void *)pos; 961 else 962 elem_parse_failed = true; 963 break; 964 case WLAN_EID_VHT_OPERATION: 965 if (elen >= sizeof(struct ieee80211_vht_operation)) 966 elems->vht_operation = (void *)pos; 967 else 968 elem_parse_failed = true; 969 break; 970 case WLAN_EID_OPMODE_NOTIF: 971 if (elen > 0) 972 elems->opmode_notif = pos; 973 else 974 elem_parse_failed = true; 975 break; 976 case WLAN_EID_MESH_ID: 977 elems->mesh_id = pos; 978 elems->mesh_id_len = elen; 979 break; 980 case WLAN_EID_MESH_CONFIG: 981 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 982 elems->mesh_config = (void *)pos; 983 else 984 elem_parse_failed = true; 985 break; 986 case WLAN_EID_PEER_MGMT: 987 elems->peering = pos; 988 elems->peering_len = elen; 989 break; 990 case WLAN_EID_MESH_AWAKE_WINDOW: 991 if (elen >= 2) 992 elems->awake_window = (void *)pos; 993 break; 994 case WLAN_EID_PREQ: 995 elems->preq = pos; 996 elems->preq_len = elen; 997 break; 998 case WLAN_EID_PREP: 999 elems->prep = pos; 1000 elems->prep_len = elen; 1001 break; 1002 case WLAN_EID_PERR: 1003 elems->perr = pos; 1004 elems->perr_len = elen; 1005 break; 1006 case WLAN_EID_RANN: 1007 if (elen >= sizeof(struct ieee80211_rann_ie)) 1008 elems->rann = (void *)pos; 1009 else 1010 elem_parse_failed = true; 1011 break; 1012 case WLAN_EID_CHANNEL_SWITCH: 1013 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1014 elem_parse_failed = true; 1015 break; 1016 } 1017 elems->ch_switch_ie = (void *)pos; 1018 break; 1019 case WLAN_EID_EXT_CHANSWITCH_ANN: 1020 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1021 elem_parse_failed = true; 1022 break; 1023 } 1024 elems->ext_chansw_ie = (void *)pos; 1025 break; 1026 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1027 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1028 elem_parse_failed = true; 1029 break; 1030 } 1031 elems->sec_chan_offs = (void *)pos; 1032 break; 1033 case WLAN_EID_CHAN_SWITCH_PARAM: 1034 if (elen != 1035 sizeof(*elems->mesh_chansw_params_ie)) { 1036 elem_parse_failed = true; 1037 break; 1038 } 1039 elems->mesh_chansw_params_ie = (void *)pos; 1040 break; 1041 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1042 if (!action || 1043 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1044 elem_parse_failed = true; 1045 break; 1046 } 1047 elems->wide_bw_chansw_ie = (void *)pos; 1048 break; 1049 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1050 if (action) { 1051 elem_parse_failed = true; 1052 break; 1053 } 1054 /* 1055 * This is a bit tricky, but as we only care about 1056 * the wide bandwidth channel switch element, so 1057 * just parse it out manually. 1058 */ 1059 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1060 pos, elen); 1061 if (ie) { 1062 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1063 elems->wide_bw_chansw_ie = 1064 (void *)(ie + 2); 1065 else 1066 elem_parse_failed = true; 1067 } 1068 break; 1069 case WLAN_EID_COUNTRY: 1070 elems->country_elem = pos; 1071 elems->country_elem_len = elen; 1072 break; 1073 case WLAN_EID_PWR_CONSTRAINT: 1074 if (elen != 1) { 1075 elem_parse_failed = true; 1076 break; 1077 } 1078 elems->pwr_constr_elem = pos; 1079 break; 1080 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1081 /* Lots of different options exist, but we only care 1082 * about the Dynamic Transmit Power Control element. 1083 * First check for the Cisco OUI, then for the DTPC 1084 * tag (0x00). 1085 */ 1086 if (elen < 4) { 1087 elem_parse_failed = true; 1088 break; 1089 } 1090 1091 if (pos[0] != 0x00 || pos[1] != 0x40 || 1092 pos[2] != 0x96 || pos[3] != 0x00) 1093 break; 1094 1095 if (elen != 6) { 1096 elem_parse_failed = true; 1097 break; 1098 } 1099 1100 if (calc_crc) 1101 crc = crc32_be(crc, pos - 2, elen + 2); 1102 1103 elems->cisco_dtpc_elem = pos; 1104 break; 1105 case WLAN_EID_TIMEOUT_INTERVAL: 1106 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1107 elems->timeout_int = (void *)pos; 1108 else 1109 elem_parse_failed = true; 1110 break; 1111 default: 1112 break; 1113 } 1114 1115 if (elem_parse_failed) 1116 elems->parse_error = true; 1117 else 1118 __set_bit(id, seen_elems); 1119 1120 left -= elen; 1121 pos += elen; 1122 } 1123 1124 if (left != 0) 1125 elems->parse_error = true; 1126 1127 return crc; 1128 } 1129 1130 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1131 bool bss_notify) 1132 { 1133 struct ieee80211_local *local = sdata->local; 1134 struct ieee80211_tx_queue_params qparam; 1135 struct ieee80211_chanctx_conf *chanctx_conf; 1136 int ac; 1137 bool use_11b, enable_qos; 1138 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1139 int aCWmin, aCWmax; 1140 1141 if (!local->ops->conf_tx) 1142 return; 1143 1144 if (local->hw.queues < IEEE80211_NUM_ACS) 1145 return; 1146 1147 memset(&qparam, 0, sizeof(qparam)); 1148 1149 rcu_read_lock(); 1150 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1151 use_11b = (chanctx_conf && 1152 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) && 1153 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1154 rcu_read_unlock(); 1155 1156 /* 1157 * By default disable QoS in STA mode for old access points, which do 1158 * not support 802.11e. New APs will provide proper queue parameters, 1159 * that we will configure later. 1160 */ 1161 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION); 1162 1163 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1164 1165 /* Set defaults according to 802.11-2007 Table 7-37 */ 1166 aCWmax = 1023; 1167 if (use_11b) 1168 aCWmin = 31; 1169 else 1170 aCWmin = 15; 1171 1172 /* Confiure old 802.11b/g medium access rules. */ 1173 qparam.cw_max = aCWmax; 1174 qparam.cw_min = aCWmin; 1175 qparam.txop = 0; 1176 qparam.aifs = 2; 1177 1178 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1179 /* Update if QoS is enabled. */ 1180 if (enable_qos) { 1181 switch (ac) { 1182 case IEEE80211_AC_BK: 1183 qparam.cw_max = aCWmax; 1184 qparam.cw_min = aCWmin; 1185 qparam.txop = 0; 1186 if (is_ocb) 1187 qparam.aifs = 9; 1188 else 1189 qparam.aifs = 7; 1190 break; 1191 /* never happens but let's not leave undefined */ 1192 default: 1193 case IEEE80211_AC_BE: 1194 qparam.cw_max = aCWmax; 1195 qparam.cw_min = aCWmin; 1196 qparam.txop = 0; 1197 if (is_ocb) 1198 qparam.aifs = 6; 1199 else 1200 qparam.aifs = 3; 1201 break; 1202 case IEEE80211_AC_VI: 1203 qparam.cw_max = aCWmin; 1204 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1205 if (is_ocb) 1206 qparam.txop = 0; 1207 else if (use_11b) 1208 qparam.txop = 6016/32; 1209 else 1210 qparam.txop = 3008/32; 1211 1212 if (is_ocb) 1213 qparam.aifs = 3; 1214 else 1215 qparam.aifs = 2; 1216 break; 1217 case IEEE80211_AC_VO: 1218 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1219 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1220 if (is_ocb) 1221 qparam.txop = 0; 1222 else if (use_11b) 1223 qparam.txop = 3264/32; 1224 else 1225 qparam.txop = 1504/32; 1226 qparam.aifs = 2; 1227 break; 1228 } 1229 } 1230 1231 qparam.uapsd = false; 1232 1233 sdata->tx_conf[ac] = qparam; 1234 drv_conf_tx(local, sdata, ac, &qparam); 1235 } 1236 1237 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1238 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { 1239 sdata->vif.bss_conf.qos = enable_qos; 1240 if (bss_notify) 1241 ieee80211_bss_info_change_notify(sdata, 1242 BSS_CHANGED_QOS); 1243 } 1244 } 1245 1246 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1247 u16 transaction, u16 auth_alg, u16 status, 1248 const u8 *extra, size_t extra_len, const u8 *da, 1249 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1250 u32 tx_flags) 1251 { 1252 struct ieee80211_local *local = sdata->local; 1253 struct sk_buff *skb; 1254 struct ieee80211_mgmt *mgmt; 1255 int err; 1256 1257 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1258 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1259 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1260 if (!skb) 1261 return; 1262 1263 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1264 1265 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); 1266 memset(mgmt, 0, 24 + 6); 1267 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1268 IEEE80211_STYPE_AUTH); 1269 memcpy(mgmt->da, da, ETH_ALEN); 1270 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1271 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1272 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1273 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1274 mgmt->u.auth.status_code = cpu_to_le16(status); 1275 if (extra) 1276 memcpy(skb_put(skb, extra_len), extra, extra_len); 1277 1278 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1279 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1280 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1281 WARN_ON(err); 1282 } 1283 1284 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1285 tx_flags; 1286 ieee80211_tx_skb(sdata, skb); 1287 } 1288 1289 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1290 const u8 *bssid, u16 stype, u16 reason, 1291 bool send_frame, u8 *frame_buf) 1292 { 1293 struct ieee80211_local *local = sdata->local; 1294 struct sk_buff *skb; 1295 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1296 1297 /* build frame */ 1298 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1299 mgmt->duration = 0; /* initialize only */ 1300 mgmt->seq_ctrl = 0; /* initialize only */ 1301 memcpy(mgmt->da, bssid, ETH_ALEN); 1302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1303 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1304 /* u.deauth.reason_code == u.disassoc.reason_code */ 1305 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1306 1307 if (send_frame) { 1308 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1309 IEEE80211_DEAUTH_FRAME_LEN); 1310 if (!skb) 1311 return; 1312 1313 skb_reserve(skb, local->hw.extra_tx_headroom); 1314 1315 /* copy in frame */ 1316 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), 1317 mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1318 1319 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1320 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1321 IEEE80211_SKB_CB(skb)->flags |= 1322 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1323 1324 ieee80211_tx_skb(sdata, skb); 1325 } 1326 } 1327 1328 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1329 u8 *buffer, size_t buffer_len, 1330 const u8 *ie, size_t ie_len, 1331 enum ieee80211_band band, 1332 u32 rate_mask, 1333 struct cfg80211_chan_def *chandef, 1334 size_t *offset) 1335 { 1336 struct ieee80211_supported_band *sband; 1337 u8 *pos = buffer, *end = buffer + buffer_len; 1338 size_t noffset; 1339 int supp_rates_len, i; 1340 u8 rates[32]; 1341 int num_rates; 1342 int ext_rates_len; 1343 int shift; 1344 u32 rate_flags; 1345 bool have_80mhz = false; 1346 1347 *offset = 0; 1348 1349 sband = local->hw.wiphy->bands[band]; 1350 if (WARN_ON_ONCE(!sband)) 1351 return 0; 1352 1353 rate_flags = ieee80211_chandef_rate_flags(chandef); 1354 shift = ieee80211_chandef_get_shift(chandef); 1355 1356 num_rates = 0; 1357 for (i = 0; i < sband->n_bitrates; i++) { 1358 if ((BIT(i) & rate_mask) == 0) 1359 continue; /* skip rate */ 1360 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1361 continue; 1362 1363 rates[num_rates++] = 1364 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1365 (1 << shift) * 5); 1366 } 1367 1368 supp_rates_len = min_t(int, num_rates, 8); 1369 1370 if (end - pos < 2 + supp_rates_len) 1371 goto out_err; 1372 *pos++ = WLAN_EID_SUPP_RATES; 1373 *pos++ = supp_rates_len; 1374 memcpy(pos, rates, supp_rates_len); 1375 pos += supp_rates_len; 1376 1377 /* insert "request information" if in custom IEs */ 1378 if (ie && ie_len) { 1379 static const u8 before_extrates[] = { 1380 WLAN_EID_SSID, 1381 WLAN_EID_SUPP_RATES, 1382 WLAN_EID_REQUEST, 1383 }; 1384 noffset = ieee80211_ie_split(ie, ie_len, 1385 before_extrates, 1386 ARRAY_SIZE(before_extrates), 1387 *offset); 1388 if (end - pos < noffset - *offset) 1389 goto out_err; 1390 memcpy(pos, ie + *offset, noffset - *offset); 1391 pos += noffset - *offset; 1392 *offset = noffset; 1393 } 1394 1395 ext_rates_len = num_rates - supp_rates_len; 1396 if (ext_rates_len > 0) { 1397 if (end - pos < 2 + ext_rates_len) 1398 goto out_err; 1399 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1400 *pos++ = ext_rates_len; 1401 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1402 pos += ext_rates_len; 1403 } 1404 1405 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) { 1406 if (end - pos < 3) 1407 goto out_err; 1408 *pos++ = WLAN_EID_DS_PARAMS; 1409 *pos++ = 1; 1410 *pos++ = ieee80211_frequency_to_channel( 1411 chandef->chan->center_freq); 1412 } 1413 1414 /* insert custom IEs that go before HT */ 1415 if (ie && ie_len) { 1416 static const u8 before_ht[] = { 1417 WLAN_EID_SSID, 1418 WLAN_EID_SUPP_RATES, 1419 WLAN_EID_REQUEST, 1420 WLAN_EID_EXT_SUPP_RATES, 1421 WLAN_EID_DS_PARAMS, 1422 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1423 }; 1424 noffset = ieee80211_ie_split(ie, ie_len, 1425 before_ht, ARRAY_SIZE(before_ht), 1426 *offset); 1427 if (end - pos < noffset - *offset) 1428 goto out_err; 1429 memcpy(pos, ie + *offset, noffset - *offset); 1430 pos += noffset - *offset; 1431 *offset = noffset; 1432 } 1433 1434 if (sband->ht_cap.ht_supported) { 1435 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1436 goto out_err; 1437 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1438 sband->ht_cap.cap); 1439 } 1440 1441 /* 1442 * If adding more here, adjust code in main.c 1443 * that calculates local->scan_ies_len. 1444 */ 1445 1446 /* insert custom IEs that go before VHT */ 1447 if (ie && ie_len) { 1448 static const u8 before_vht[] = { 1449 WLAN_EID_SSID, 1450 WLAN_EID_SUPP_RATES, 1451 WLAN_EID_REQUEST, 1452 WLAN_EID_EXT_SUPP_RATES, 1453 WLAN_EID_DS_PARAMS, 1454 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1455 WLAN_EID_HT_CAPABILITY, 1456 WLAN_EID_BSS_COEX_2040, 1457 WLAN_EID_EXT_CAPABILITY, 1458 WLAN_EID_SSID_LIST, 1459 WLAN_EID_CHANNEL_USAGE, 1460 WLAN_EID_INTERWORKING, 1461 /* mesh ID can't happen here */ 1462 /* 60 GHz can't happen here right now */ 1463 }; 1464 noffset = ieee80211_ie_split(ie, ie_len, 1465 before_vht, ARRAY_SIZE(before_vht), 1466 *offset); 1467 if (end - pos < noffset - *offset) 1468 goto out_err; 1469 memcpy(pos, ie + *offset, noffset - *offset); 1470 pos += noffset - *offset; 1471 *offset = noffset; 1472 } 1473 1474 /* Check if any channel in this sband supports at least 80 MHz */ 1475 for (i = 0; i < sband->n_channels; i++) { 1476 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1477 IEEE80211_CHAN_NO_80MHZ)) 1478 continue; 1479 1480 have_80mhz = true; 1481 break; 1482 } 1483 1484 if (sband->vht_cap.vht_supported && have_80mhz) { 1485 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1486 goto out_err; 1487 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1488 sband->vht_cap.cap); 1489 } 1490 1491 return pos - buffer; 1492 out_err: 1493 WARN_ONCE(1, "not enough space for preq IEs\n"); 1494 return pos - buffer; 1495 } 1496 1497 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1498 size_t buffer_len, 1499 struct ieee80211_scan_ies *ie_desc, 1500 const u8 *ie, size_t ie_len, 1501 u8 bands_used, u32 *rate_masks, 1502 struct cfg80211_chan_def *chandef) 1503 { 1504 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1505 int i; 1506 1507 memset(ie_desc, 0, sizeof(*ie_desc)); 1508 1509 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1510 if (bands_used & BIT(i)) { 1511 pos += ieee80211_build_preq_ies_band(local, 1512 buffer + pos, 1513 buffer_len - pos, 1514 ie, ie_len, i, 1515 rate_masks[i], 1516 chandef, 1517 &custom_ie_offset); 1518 ie_desc->ies[i] = buffer + old_pos; 1519 ie_desc->len[i] = pos - old_pos; 1520 old_pos = pos; 1521 } 1522 } 1523 1524 /* add any remaining custom IEs */ 1525 if (ie && ie_len) { 1526 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1527 "not enough space for preq custom IEs\n")) 1528 return pos; 1529 memcpy(buffer + pos, ie + custom_ie_offset, 1530 ie_len - custom_ie_offset); 1531 ie_desc->common_ies = buffer + pos; 1532 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1533 pos += ie_len - custom_ie_offset; 1534 } 1535 1536 return pos; 1537 }; 1538 1539 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1540 const u8 *src, const u8 *dst, 1541 u32 ratemask, 1542 struct ieee80211_channel *chan, 1543 const u8 *ssid, size_t ssid_len, 1544 const u8 *ie, size_t ie_len, 1545 bool directed) 1546 { 1547 struct ieee80211_local *local = sdata->local; 1548 struct cfg80211_chan_def chandef; 1549 struct sk_buff *skb; 1550 struct ieee80211_mgmt *mgmt; 1551 int ies_len; 1552 u32 rate_masks[IEEE80211_NUM_BANDS] = {}; 1553 struct ieee80211_scan_ies dummy_ie_desc; 1554 1555 /* 1556 * Do not send DS Channel parameter for directed probe requests 1557 * in order to maximize the chance that we get a response. Some 1558 * badly-behaved APs don't respond when this parameter is included. 1559 */ 1560 chandef.width = sdata->vif.bss_conf.chandef.width; 1561 if (directed) 1562 chandef.chan = NULL; 1563 else 1564 chandef.chan = chan; 1565 1566 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1567 100 + ie_len); 1568 if (!skb) 1569 return NULL; 1570 1571 rate_masks[chan->band] = ratemask; 1572 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1573 skb_tailroom(skb), &dummy_ie_desc, 1574 ie, ie_len, BIT(chan->band), 1575 rate_masks, &chandef); 1576 skb_put(skb, ies_len); 1577 1578 if (dst) { 1579 mgmt = (struct ieee80211_mgmt *) skb->data; 1580 memcpy(mgmt->da, dst, ETH_ALEN); 1581 memcpy(mgmt->bssid, dst, ETH_ALEN); 1582 } 1583 1584 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1585 1586 return skb; 1587 } 1588 1589 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, 1590 const u8 *src, const u8 *dst, 1591 const u8 *ssid, size_t ssid_len, 1592 const u8 *ie, size_t ie_len, 1593 u32 ratemask, bool directed, u32 tx_flags, 1594 struct ieee80211_channel *channel, bool scan) 1595 { 1596 struct sk_buff *skb; 1597 1598 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, 1599 ssid, ssid_len, 1600 ie, ie_len, directed); 1601 if (skb) { 1602 IEEE80211_SKB_CB(skb)->flags |= tx_flags; 1603 if (scan) 1604 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); 1605 else 1606 ieee80211_tx_skb(sdata, skb); 1607 } 1608 } 1609 1610 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1611 struct ieee802_11_elems *elems, 1612 enum ieee80211_band band, u32 *basic_rates) 1613 { 1614 struct ieee80211_supported_band *sband; 1615 size_t num_rates; 1616 u32 supp_rates, rate_flags; 1617 int i, j, shift; 1618 sband = sdata->local->hw.wiphy->bands[band]; 1619 1620 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1621 shift = ieee80211_vif_get_shift(&sdata->vif); 1622 1623 if (WARN_ON(!sband)) 1624 return 1; 1625 1626 num_rates = sband->n_bitrates; 1627 supp_rates = 0; 1628 for (i = 0; i < elems->supp_rates_len + 1629 elems->ext_supp_rates_len; i++) { 1630 u8 rate = 0; 1631 int own_rate; 1632 bool is_basic; 1633 if (i < elems->supp_rates_len) 1634 rate = elems->supp_rates[i]; 1635 else if (elems->ext_supp_rates) 1636 rate = elems->ext_supp_rates 1637 [i - elems->supp_rates_len]; 1638 own_rate = 5 * (rate & 0x7f); 1639 is_basic = !!(rate & 0x80); 1640 1641 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1642 continue; 1643 1644 for (j = 0; j < num_rates; j++) { 1645 int brate; 1646 if ((rate_flags & sband->bitrates[j].flags) 1647 != rate_flags) 1648 continue; 1649 1650 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1651 1 << shift); 1652 1653 if (brate == own_rate) { 1654 supp_rates |= BIT(j); 1655 if (basic_rates && is_basic) 1656 *basic_rates |= BIT(j); 1657 } 1658 } 1659 } 1660 return supp_rates; 1661 } 1662 1663 void ieee80211_stop_device(struct ieee80211_local *local) 1664 { 1665 ieee80211_led_radio(local, false); 1666 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1667 1668 cancel_work_sync(&local->reconfig_filter); 1669 1670 flush_workqueue(local->workqueue); 1671 drv_stop(local); 1672 } 1673 1674 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1675 { 1676 struct ieee80211_sub_if_data *sdata; 1677 struct ieee80211_chanctx *ctx; 1678 1679 /* 1680 * We get here if during resume the device can't be restarted properly. 1681 * We might also get here if this happens during HW reset, which is a 1682 * slightly different situation and we need to drop all connections in 1683 * the latter case. 1684 * 1685 * Ask cfg80211 to turn off all interfaces, this will result in more 1686 * warnings but at least we'll then get into a clean stopped state. 1687 */ 1688 1689 local->resuming = false; 1690 local->suspended = false; 1691 local->started = false; 1692 1693 /* scheduled scan clearly can't be running any more, but tell 1694 * cfg80211 and clear local state 1695 */ 1696 ieee80211_sched_scan_end(local); 1697 1698 list_for_each_entry(sdata, &local->interfaces, list) 1699 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1700 1701 /* Mark channel contexts as not being in the driver any more to avoid 1702 * removing them from the driver during the shutdown process... 1703 */ 1704 mutex_lock(&local->chanctx_mtx); 1705 list_for_each_entry(ctx, &local->chanctx_list, list) 1706 ctx->driver_present = false; 1707 mutex_unlock(&local->chanctx_mtx); 1708 1709 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1710 } 1711 1712 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1713 struct ieee80211_sub_if_data *sdata) 1714 { 1715 struct ieee80211_chanctx_conf *conf; 1716 struct ieee80211_chanctx *ctx; 1717 1718 if (!local->use_chanctx) 1719 return; 1720 1721 mutex_lock(&local->chanctx_mtx); 1722 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1723 lockdep_is_held(&local->chanctx_mtx)); 1724 if (conf) { 1725 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1726 drv_assign_vif_chanctx(local, sdata, ctx); 1727 } 1728 mutex_unlock(&local->chanctx_mtx); 1729 } 1730 1731 int ieee80211_reconfig(struct ieee80211_local *local) 1732 { 1733 struct ieee80211_hw *hw = &local->hw; 1734 struct ieee80211_sub_if_data *sdata; 1735 struct ieee80211_chanctx *ctx; 1736 struct sta_info *sta; 1737 int res, i; 1738 bool reconfig_due_to_wowlan = false; 1739 struct ieee80211_sub_if_data *sched_scan_sdata; 1740 struct cfg80211_sched_scan_request *sched_scan_req; 1741 bool sched_scan_stopped = false; 1742 1743 /* nothing to do if HW shouldn't run */ 1744 if (!local->open_count) 1745 goto wake_up; 1746 1747 #ifdef CONFIG_PM 1748 if (local->suspended) 1749 local->resuming = true; 1750 1751 if (local->wowlan) { 1752 res = drv_resume(local); 1753 local->wowlan = false; 1754 if (res < 0) { 1755 local->resuming = false; 1756 return res; 1757 } 1758 if (res == 0) 1759 goto wake_up; 1760 WARN_ON(res > 1); 1761 /* 1762 * res is 1, which means the driver requested 1763 * to go through a regular reset on wakeup. 1764 */ 1765 reconfig_due_to_wowlan = true; 1766 } 1767 #endif 1768 1769 /* 1770 * Upon resume hardware can sometimes be goofy due to 1771 * various platform / driver / bus issues, so restarting 1772 * the device may at times not work immediately. Propagate 1773 * the error. 1774 */ 1775 res = drv_start(local); 1776 if (res) { 1777 if (local->suspended) 1778 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1779 else 1780 WARN(1, "Hardware became unavailable during restart.\n"); 1781 ieee80211_handle_reconfig_failure(local); 1782 return res; 1783 } 1784 1785 /* setup fragmentation threshold */ 1786 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1787 1788 /* setup RTS threshold */ 1789 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1790 1791 /* reset coverage class */ 1792 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1793 1794 ieee80211_led_radio(local, true); 1795 ieee80211_mod_tpt_led_trig(local, 1796 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1797 1798 /* add interfaces */ 1799 sdata = rtnl_dereference(local->monitor_sdata); 1800 if (sdata) { 1801 /* in HW restart it exists already */ 1802 WARN_ON(local->resuming); 1803 res = drv_add_interface(local, sdata); 1804 if (WARN_ON(res)) { 1805 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1806 synchronize_net(); 1807 kfree(sdata); 1808 } 1809 } 1810 1811 list_for_each_entry(sdata, &local->interfaces, list) { 1812 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1813 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1814 ieee80211_sdata_running(sdata)) 1815 res = drv_add_interface(local, sdata); 1816 } 1817 1818 /* add channel contexts */ 1819 if (local->use_chanctx) { 1820 mutex_lock(&local->chanctx_mtx); 1821 list_for_each_entry(ctx, &local->chanctx_list, list) 1822 if (ctx->replace_state != 1823 IEEE80211_CHANCTX_REPLACES_OTHER) 1824 WARN_ON(drv_add_chanctx(local, ctx)); 1825 mutex_unlock(&local->chanctx_mtx); 1826 1827 list_for_each_entry(sdata, &local->interfaces, list) { 1828 if (!ieee80211_sdata_running(sdata)) 1829 continue; 1830 ieee80211_assign_chanctx(local, sdata); 1831 } 1832 1833 sdata = rtnl_dereference(local->monitor_sdata); 1834 if (sdata && ieee80211_sdata_running(sdata)) 1835 ieee80211_assign_chanctx(local, sdata); 1836 } 1837 1838 /* add STAs back */ 1839 mutex_lock(&local->sta_mtx); 1840 list_for_each_entry(sta, &local->sta_list, list) { 1841 enum ieee80211_sta_state state; 1842 1843 if (!sta->uploaded) 1844 continue; 1845 1846 /* AP-mode stations will be added later */ 1847 if (sta->sdata->vif.type == NL80211_IFTYPE_AP) 1848 continue; 1849 1850 for (state = IEEE80211_STA_NOTEXIST; 1851 state < sta->sta_state; state++) 1852 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1853 state + 1)); 1854 } 1855 mutex_unlock(&local->sta_mtx); 1856 1857 /* reconfigure tx conf */ 1858 if (hw->queues >= IEEE80211_NUM_ACS) { 1859 list_for_each_entry(sdata, &local->interfaces, list) { 1860 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1861 sdata->vif.type == NL80211_IFTYPE_MONITOR || 1862 !ieee80211_sdata_running(sdata)) 1863 continue; 1864 1865 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1866 drv_conf_tx(local, sdata, i, 1867 &sdata->tx_conf[i]); 1868 } 1869 } 1870 1871 /* reconfigure hardware */ 1872 ieee80211_hw_config(local, ~0); 1873 1874 ieee80211_configure_filter(local); 1875 1876 /* Finally also reconfigure all the BSS information */ 1877 list_for_each_entry(sdata, &local->interfaces, list) { 1878 u32 changed; 1879 1880 if (!ieee80211_sdata_running(sdata)) 1881 continue; 1882 1883 /* common change flags for all interface types */ 1884 changed = BSS_CHANGED_ERP_CTS_PROT | 1885 BSS_CHANGED_ERP_PREAMBLE | 1886 BSS_CHANGED_ERP_SLOT | 1887 BSS_CHANGED_HT | 1888 BSS_CHANGED_BASIC_RATES | 1889 BSS_CHANGED_BEACON_INT | 1890 BSS_CHANGED_BSSID | 1891 BSS_CHANGED_CQM | 1892 BSS_CHANGED_QOS | 1893 BSS_CHANGED_IDLE | 1894 BSS_CHANGED_TXPOWER; 1895 1896 switch (sdata->vif.type) { 1897 case NL80211_IFTYPE_STATION: 1898 changed |= BSS_CHANGED_ASSOC | 1899 BSS_CHANGED_ARP_FILTER | 1900 BSS_CHANGED_PS; 1901 1902 /* Re-send beacon info report to the driver */ 1903 if (sdata->u.mgd.have_beacon) 1904 changed |= BSS_CHANGED_BEACON_INFO; 1905 1906 sdata_lock(sdata); 1907 ieee80211_bss_info_change_notify(sdata, changed); 1908 sdata_unlock(sdata); 1909 break; 1910 case NL80211_IFTYPE_OCB: 1911 changed |= BSS_CHANGED_OCB; 1912 ieee80211_bss_info_change_notify(sdata, changed); 1913 break; 1914 case NL80211_IFTYPE_ADHOC: 1915 changed |= BSS_CHANGED_IBSS; 1916 /* fall through */ 1917 case NL80211_IFTYPE_AP: 1918 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 1919 1920 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1921 changed |= BSS_CHANGED_AP_PROBE_RESP; 1922 1923 if (rcu_access_pointer(sdata->u.ap.beacon)) 1924 drv_start_ap(local, sdata); 1925 } 1926 1927 /* fall through */ 1928 case NL80211_IFTYPE_MESH_POINT: 1929 if (sdata->vif.bss_conf.enable_beacon) { 1930 changed |= BSS_CHANGED_BEACON | 1931 BSS_CHANGED_BEACON_ENABLED; 1932 ieee80211_bss_info_change_notify(sdata, changed); 1933 } 1934 break; 1935 case NL80211_IFTYPE_WDS: 1936 case NL80211_IFTYPE_AP_VLAN: 1937 case NL80211_IFTYPE_MONITOR: 1938 case NL80211_IFTYPE_P2P_DEVICE: 1939 /* nothing to do */ 1940 break; 1941 case NL80211_IFTYPE_UNSPECIFIED: 1942 case NUM_NL80211_IFTYPES: 1943 case NL80211_IFTYPE_P2P_CLIENT: 1944 case NL80211_IFTYPE_P2P_GO: 1945 WARN_ON(1); 1946 break; 1947 } 1948 } 1949 1950 ieee80211_recalc_ps(local, -1); 1951 1952 /* 1953 * The sta might be in psm against the ap (e.g. because 1954 * this was the state before a hw restart), so we 1955 * explicitly send a null packet in order to make sure 1956 * it'll sync against the ap (and get out of psm). 1957 */ 1958 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 1959 list_for_each_entry(sdata, &local->interfaces, list) { 1960 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1961 continue; 1962 if (!sdata->u.mgd.associated) 1963 continue; 1964 1965 ieee80211_send_nullfunc(local, sdata, 0); 1966 } 1967 } 1968 1969 /* APs are now beaconing, add back stations */ 1970 mutex_lock(&local->sta_mtx); 1971 list_for_each_entry(sta, &local->sta_list, list) { 1972 enum ieee80211_sta_state state; 1973 1974 if (!sta->uploaded) 1975 continue; 1976 1977 if (sta->sdata->vif.type != NL80211_IFTYPE_AP) 1978 continue; 1979 1980 for (state = IEEE80211_STA_NOTEXIST; 1981 state < sta->sta_state; state++) 1982 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1983 state + 1)); 1984 } 1985 mutex_unlock(&local->sta_mtx); 1986 1987 /* add back keys */ 1988 list_for_each_entry(sdata, &local->interfaces, list) 1989 if (ieee80211_sdata_running(sdata)) 1990 ieee80211_enable_keys(sdata); 1991 1992 wake_up: 1993 local->in_reconfig = false; 1994 barrier(); 1995 1996 if (local->monitors == local->open_count && local->monitors > 0) 1997 ieee80211_add_virtual_monitor(local); 1998 1999 /* 2000 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2001 * sessions can be established after a resume. 2002 * 2003 * Also tear down aggregation sessions since reconfiguring 2004 * them in a hardware restart scenario is not easily done 2005 * right now, and the hardware will have lost information 2006 * about the sessions, but we and the AP still think they 2007 * are active. This is really a workaround though. 2008 */ 2009 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 2010 mutex_lock(&local->sta_mtx); 2011 2012 list_for_each_entry(sta, &local->sta_list, list) { 2013 ieee80211_sta_tear_down_BA_sessions( 2014 sta, AGG_STOP_LOCAL_REQUEST); 2015 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2016 } 2017 2018 mutex_unlock(&local->sta_mtx); 2019 } 2020 2021 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2022 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2023 false); 2024 2025 /* 2026 * Reconfigure sched scan if it was interrupted by FW restart or 2027 * suspend. 2028 */ 2029 mutex_lock(&local->mtx); 2030 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2031 lockdep_is_held(&local->mtx)); 2032 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2033 lockdep_is_held(&local->mtx)); 2034 if (sched_scan_sdata && sched_scan_req) 2035 /* 2036 * Sched scan stopped, but we don't want to report it. Instead, 2037 * we're trying to reschedule. 2038 */ 2039 if (__ieee80211_request_sched_scan_start(sched_scan_sdata, 2040 sched_scan_req)) 2041 sched_scan_stopped = true; 2042 mutex_unlock(&local->mtx); 2043 2044 if (sched_scan_stopped) 2045 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy); 2046 2047 /* 2048 * If this is for hw restart things are still running. 2049 * We may want to change that later, however. 2050 */ 2051 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan)) 2052 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2053 2054 if (!local->suspended) 2055 return 0; 2056 2057 #ifdef CONFIG_PM 2058 /* first set suspended false, then resuming */ 2059 local->suspended = false; 2060 mb(); 2061 local->resuming = false; 2062 2063 /* It's possible that we don't handle the scan completion in 2064 * time during suspend, so if it's still marked as completed 2065 * here, queue the work and flush it to clean things up. 2066 * Instead of calling the worker function directly here, we 2067 * really queue it to avoid potential races with other flows 2068 * scheduling the same work. 2069 */ 2070 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2071 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2072 flush_delayed_work(&local->scan_work); 2073 } 2074 2075 if (local->open_count && !reconfig_due_to_wowlan) 2076 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2077 2078 list_for_each_entry(sdata, &local->interfaces, list) { 2079 if (!ieee80211_sdata_running(sdata)) 2080 continue; 2081 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2082 ieee80211_sta_restart(sdata); 2083 } 2084 2085 mod_timer(&local->sta_cleanup, jiffies + 1); 2086 #else 2087 WARN_ON(1); 2088 #endif 2089 2090 return 0; 2091 } 2092 2093 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2094 { 2095 struct ieee80211_sub_if_data *sdata; 2096 struct ieee80211_local *local; 2097 struct ieee80211_key *key; 2098 2099 if (WARN_ON(!vif)) 2100 return; 2101 2102 sdata = vif_to_sdata(vif); 2103 local = sdata->local; 2104 2105 if (WARN_ON(!local->resuming)) 2106 return; 2107 2108 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2109 return; 2110 2111 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2112 2113 mutex_lock(&local->key_mtx); 2114 list_for_each_entry(key, &sdata->key_list, list) 2115 key->flags |= KEY_FLAG_TAINTED; 2116 mutex_unlock(&local->key_mtx); 2117 } 2118 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2119 2120 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2121 { 2122 struct ieee80211_local *local = sdata->local; 2123 struct ieee80211_chanctx_conf *chanctx_conf; 2124 struct ieee80211_chanctx *chanctx; 2125 2126 mutex_lock(&local->chanctx_mtx); 2127 2128 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2129 lockdep_is_held(&local->chanctx_mtx)); 2130 2131 if (WARN_ON_ONCE(!chanctx_conf)) 2132 goto unlock; 2133 2134 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2135 ieee80211_recalc_smps_chanctx(local, chanctx); 2136 unlock: 2137 mutex_unlock(&local->chanctx_mtx); 2138 } 2139 2140 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2141 { 2142 struct ieee80211_local *local = sdata->local; 2143 struct ieee80211_chanctx_conf *chanctx_conf; 2144 struct ieee80211_chanctx *chanctx; 2145 2146 mutex_lock(&local->chanctx_mtx); 2147 2148 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2149 lockdep_is_held(&local->chanctx_mtx)); 2150 2151 if (WARN_ON_ONCE(!chanctx_conf)) 2152 goto unlock; 2153 2154 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2155 ieee80211_recalc_chanctx_min_def(local, chanctx); 2156 unlock: 2157 mutex_unlock(&local->chanctx_mtx); 2158 } 2159 2160 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) 2161 { 2162 int i; 2163 2164 for (i = 0; i < n_ids; i++) 2165 if (ids[i] == id) 2166 return true; 2167 return false; 2168 } 2169 2170 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, 2171 const u8 *ids, int n_ids, 2172 const u8 *after_ric, int n_after_ric, 2173 size_t offset) 2174 { 2175 size_t pos = offset; 2176 2177 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) { 2178 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { 2179 pos += 2 + ies[pos + 1]; 2180 2181 while (pos < ielen && 2182 !ieee80211_id_in_list(after_ric, n_after_ric, 2183 ies[pos])) 2184 pos += 2 + ies[pos + 1]; 2185 } else { 2186 pos += 2 + ies[pos + 1]; 2187 } 2188 } 2189 2190 return pos; 2191 } 2192 2193 size_t ieee80211_ie_split(const u8 *ies, size_t ielen, 2194 const u8 *ids, int n_ids, size_t offset) 2195 { 2196 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset); 2197 } 2198 EXPORT_SYMBOL(ieee80211_ie_split); 2199 2200 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2201 { 2202 size_t pos = offset; 2203 2204 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2205 pos += 2 + ies[pos + 1]; 2206 2207 return pos; 2208 } 2209 2210 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2211 int rssi_min_thold, 2212 int rssi_max_thold) 2213 { 2214 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2215 2216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2217 return; 2218 2219 /* 2220 * Scale up threshold values before storing it, as the RSSI averaging 2221 * algorithm uses a scaled up value as well. Change this scaling 2222 * factor if the RSSI averaging algorithm changes. 2223 */ 2224 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2225 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2226 } 2227 2228 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2229 int rssi_min_thold, 2230 int rssi_max_thold) 2231 { 2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2233 2234 WARN_ON(rssi_min_thold == rssi_max_thold || 2235 rssi_min_thold > rssi_max_thold); 2236 2237 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2238 rssi_max_thold); 2239 } 2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2241 2242 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2243 { 2244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2245 2246 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2247 } 2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2249 2250 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2251 u16 cap) 2252 { 2253 __le16 tmp; 2254 2255 *pos++ = WLAN_EID_HT_CAPABILITY; 2256 *pos++ = sizeof(struct ieee80211_ht_cap); 2257 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2258 2259 /* capability flags */ 2260 tmp = cpu_to_le16(cap); 2261 memcpy(pos, &tmp, sizeof(u16)); 2262 pos += sizeof(u16); 2263 2264 /* AMPDU parameters */ 2265 *pos++ = ht_cap->ampdu_factor | 2266 (ht_cap->ampdu_density << 2267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2268 2269 /* MCS set */ 2270 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2271 pos += sizeof(ht_cap->mcs); 2272 2273 /* extended capabilities */ 2274 pos += sizeof(__le16); 2275 2276 /* BF capabilities */ 2277 pos += sizeof(__le32); 2278 2279 /* antenna selection */ 2280 pos += sizeof(u8); 2281 2282 return pos; 2283 } 2284 2285 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2286 u32 cap) 2287 { 2288 __le32 tmp; 2289 2290 *pos++ = WLAN_EID_VHT_CAPABILITY; 2291 *pos++ = sizeof(struct ieee80211_vht_cap); 2292 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2293 2294 /* capability flags */ 2295 tmp = cpu_to_le32(cap); 2296 memcpy(pos, &tmp, sizeof(u32)); 2297 pos += sizeof(u32); 2298 2299 /* VHT MCS set */ 2300 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2301 pos += sizeof(vht_cap->vht_mcs); 2302 2303 return pos; 2304 } 2305 2306 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2307 const struct cfg80211_chan_def *chandef, 2308 u16 prot_mode) 2309 { 2310 struct ieee80211_ht_operation *ht_oper; 2311 /* Build HT Information */ 2312 *pos++ = WLAN_EID_HT_OPERATION; 2313 *pos++ = sizeof(struct ieee80211_ht_operation); 2314 ht_oper = (struct ieee80211_ht_operation *)pos; 2315 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2316 chandef->chan->center_freq); 2317 switch (chandef->width) { 2318 case NL80211_CHAN_WIDTH_160: 2319 case NL80211_CHAN_WIDTH_80P80: 2320 case NL80211_CHAN_WIDTH_80: 2321 case NL80211_CHAN_WIDTH_40: 2322 if (chandef->center_freq1 > chandef->chan->center_freq) 2323 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2324 else 2325 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2326 break; 2327 default: 2328 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2329 break; 2330 } 2331 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2332 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2333 chandef->width != NL80211_CHAN_WIDTH_20) 2334 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2335 2336 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2337 ht_oper->stbc_param = 0x0000; 2338 2339 /* It seems that Basic MCS set and Supported MCS set 2340 are identical for the first 10 bytes */ 2341 memset(&ht_oper->basic_set, 0, 16); 2342 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2343 2344 return pos + sizeof(struct ieee80211_ht_operation); 2345 } 2346 2347 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, 2348 const struct ieee80211_ht_operation *ht_oper, 2349 struct cfg80211_chan_def *chandef) 2350 { 2351 enum nl80211_channel_type channel_type; 2352 2353 if (!ht_oper) { 2354 cfg80211_chandef_create(chandef, control_chan, 2355 NL80211_CHAN_NO_HT); 2356 return; 2357 } 2358 2359 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2360 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2361 channel_type = NL80211_CHAN_HT20; 2362 break; 2363 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2364 channel_type = NL80211_CHAN_HT40PLUS; 2365 break; 2366 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2367 channel_type = NL80211_CHAN_HT40MINUS; 2368 break; 2369 default: 2370 channel_type = NL80211_CHAN_NO_HT; 2371 } 2372 2373 cfg80211_chandef_create(chandef, control_chan, channel_type); 2374 } 2375 2376 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2377 const struct ieee80211_supported_band *sband, 2378 const u8 *srates, int srates_len, u32 *rates) 2379 { 2380 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2381 int shift = ieee80211_chandef_get_shift(chandef); 2382 struct ieee80211_rate *br; 2383 int brate, rate, i, j, count = 0; 2384 2385 *rates = 0; 2386 2387 for (i = 0; i < srates_len; i++) { 2388 rate = srates[i] & 0x7f; 2389 2390 for (j = 0; j < sband->n_bitrates; j++) { 2391 br = &sband->bitrates[j]; 2392 if ((rate_flags & br->flags) != rate_flags) 2393 continue; 2394 2395 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2396 if (brate == rate) { 2397 *rates |= BIT(j); 2398 count++; 2399 break; 2400 } 2401 } 2402 } 2403 return count; 2404 } 2405 2406 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2407 struct sk_buff *skb, bool need_basic, 2408 enum ieee80211_band band) 2409 { 2410 struct ieee80211_local *local = sdata->local; 2411 struct ieee80211_supported_band *sband; 2412 int rate, shift; 2413 u8 i, rates, *pos; 2414 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2415 u32 rate_flags; 2416 2417 shift = ieee80211_vif_get_shift(&sdata->vif); 2418 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2419 sband = local->hw.wiphy->bands[band]; 2420 rates = 0; 2421 for (i = 0; i < sband->n_bitrates; i++) { 2422 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2423 continue; 2424 rates++; 2425 } 2426 if (rates > 8) 2427 rates = 8; 2428 2429 if (skb_tailroom(skb) < rates + 2) 2430 return -ENOMEM; 2431 2432 pos = skb_put(skb, rates + 2); 2433 *pos++ = WLAN_EID_SUPP_RATES; 2434 *pos++ = rates; 2435 for (i = 0; i < rates; i++) { 2436 u8 basic = 0; 2437 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2438 continue; 2439 2440 if (need_basic && basic_rates & BIT(i)) 2441 basic = 0x80; 2442 rate = sband->bitrates[i].bitrate; 2443 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2444 5 * (1 << shift)); 2445 *pos++ = basic | (u8) rate; 2446 } 2447 2448 return 0; 2449 } 2450 2451 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2452 struct sk_buff *skb, bool need_basic, 2453 enum ieee80211_band band) 2454 { 2455 struct ieee80211_local *local = sdata->local; 2456 struct ieee80211_supported_band *sband; 2457 int rate, shift; 2458 u8 i, exrates, *pos; 2459 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2460 u32 rate_flags; 2461 2462 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2463 shift = ieee80211_vif_get_shift(&sdata->vif); 2464 2465 sband = local->hw.wiphy->bands[band]; 2466 exrates = 0; 2467 for (i = 0; i < sband->n_bitrates; i++) { 2468 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2469 continue; 2470 exrates++; 2471 } 2472 2473 if (exrates > 8) 2474 exrates -= 8; 2475 else 2476 exrates = 0; 2477 2478 if (skb_tailroom(skb) < exrates + 2) 2479 return -ENOMEM; 2480 2481 if (exrates) { 2482 pos = skb_put(skb, exrates + 2); 2483 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2484 *pos++ = exrates; 2485 for (i = 8; i < sband->n_bitrates; i++) { 2486 u8 basic = 0; 2487 if ((rate_flags & sband->bitrates[i].flags) 2488 != rate_flags) 2489 continue; 2490 if (need_basic && basic_rates & BIT(i)) 2491 basic = 0x80; 2492 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2493 5 * (1 << shift)); 2494 *pos++ = basic | (u8) rate; 2495 } 2496 } 2497 return 0; 2498 } 2499 2500 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2501 { 2502 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2504 2505 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2506 /* non-managed type inferfaces */ 2507 return 0; 2508 } 2509 return ifmgd->ave_beacon_signal / 16; 2510 } 2511 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2512 2513 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2514 { 2515 if (!mcs) 2516 return 1; 2517 2518 /* TODO: consider rx_highest */ 2519 2520 if (mcs->rx_mask[3]) 2521 return 4; 2522 if (mcs->rx_mask[2]) 2523 return 3; 2524 if (mcs->rx_mask[1]) 2525 return 2; 2526 return 1; 2527 } 2528 2529 /** 2530 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2531 * @local: mac80211 hw info struct 2532 * @status: RX status 2533 * @mpdu_len: total MPDU length (including FCS) 2534 * @mpdu_offset: offset into MPDU to calculate timestamp at 2535 * 2536 * This function calculates the RX timestamp at the given MPDU offset, taking 2537 * into account what the RX timestamp was. An offset of 0 will just normalize 2538 * the timestamp to TSF at beginning of MPDU reception. 2539 */ 2540 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2541 struct ieee80211_rx_status *status, 2542 unsigned int mpdu_len, 2543 unsigned int mpdu_offset) 2544 { 2545 u64 ts = status->mactime; 2546 struct rate_info ri; 2547 u16 rate; 2548 2549 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2550 return 0; 2551 2552 memset(&ri, 0, sizeof(ri)); 2553 2554 /* Fill cfg80211 rate info */ 2555 if (status->flag & RX_FLAG_HT) { 2556 ri.mcs = status->rate_idx; 2557 ri.flags |= RATE_INFO_FLAGS_MCS; 2558 if (status->flag & RX_FLAG_40MHZ) 2559 ri.bw = RATE_INFO_BW_40; 2560 else 2561 ri.bw = RATE_INFO_BW_20; 2562 if (status->flag & RX_FLAG_SHORT_GI) 2563 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2564 } else if (status->flag & RX_FLAG_VHT) { 2565 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2566 ri.mcs = status->rate_idx; 2567 ri.nss = status->vht_nss; 2568 if (status->flag & RX_FLAG_40MHZ) 2569 ri.bw = RATE_INFO_BW_40; 2570 else if (status->vht_flag & RX_VHT_FLAG_80MHZ) 2571 ri.bw = RATE_INFO_BW_80; 2572 else if (status->vht_flag & RX_VHT_FLAG_160MHZ) 2573 ri.bw = RATE_INFO_BW_160; 2574 else 2575 ri.bw = RATE_INFO_BW_20; 2576 if (status->flag & RX_FLAG_SHORT_GI) 2577 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2578 } else { 2579 struct ieee80211_supported_band *sband; 2580 int shift = 0; 2581 int bitrate; 2582 2583 if (status->flag & RX_FLAG_10MHZ) { 2584 shift = 1; 2585 ri.bw = RATE_INFO_BW_10; 2586 } else if (status->flag & RX_FLAG_5MHZ) { 2587 shift = 2; 2588 ri.bw = RATE_INFO_BW_5; 2589 } else { 2590 ri.bw = RATE_INFO_BW_20; 2591 } 2592 2593 sband = local->hw.wiphy->bands[status->band]; 2594 bitrate = sband->bitrates[status->rate_idx].bitrate; 2595 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2596 } 2597 2598 rate = cfg80211_calculate_bitrate(&ri); 2599 if (WARN_ONCE(!rate, 2600 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n", 2601 status->flag, status->rate_idx, status->vht_nss)) 2602 return 0; 2603 2604 /* rewind from end of MPDU */ 2605 if (status->flag & RX_FLAG_MACTIME_END) 2606 ts -= mpdu_len * 8 * 10 / rate; 2607 2608 ts += mpdu_offset * 8 * 10 / rate; 2609 2610 return ts; 2611 } 2612 2613 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2614 { 2615 struct ieee80211_sub_if_data *sdata; 2616 struct cfg80211_chan_def chandef; 2617 2618 mutex_lock(&local->mtx); 2619 mutex_lock(&local->iflist_mtx); 2620 list_for_each_entry(sdata, &local->interfaces, list) { 2621 /* it might be waiting for the local->mtx, but then 2622 * by the time it gets it, sdata->wdev.cac_started 2623 * will no longer be true 2624 */ 2625 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2626 2627 if (sdata->wdev.cac_started) { 2628 chandef = sdata->vif.bss_conf.chandef; 2629 ieee80211_vif_release_channel(sdata); 2630 cfg80211_cac_event(sdata->dev, 2631 &chandef, 2632 NL80211_RADAR_CAC_ABORTED, 2633 GFP_KERNEL); 2634 } 2635 } 2636 mutex_unlock(&local->iflist_mtx); 2637 mutex_unlock(&local->mtx); 2638 } 2639 2640 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2641 { 2642 struct ieee80211_local *local = 2643 container_of(work, struct ieee80211_local, radar_detected_work); 2644 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2645 struct ieee80211_chanctx *ctx; 2646 int num_chanctx = 0; 2647 2648 mutex_lock(&local->chanctx_mtx); 2649 list_for_each_entry(ctx, &local->chanctx_list, list) { 2650 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 2651 continue; 2652 2653 num_chanctx++; 2654 chandef = ctx->conf.def; 2655 } 2656 mutex_unlock(&local->chanctx_mtx); 2657 2658 ieee80211_dfs_cac_cancel(local); 2659 2660 if (num_chanctx > 1) 2661 /* XXX: multi-channel is not supported yet */ 2662 WARN_ON(1); 2663 else 2664 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 2665 } 2666 2667 void ieee80211_radar_detected(struct ieee80211_hw *hw) 2668 { 2669 struct ieee80211_local *local = hw_to_local(hw); 2670 2671 trace_api_radar_detected(local); 2672 2673 ieee80211_queue_work(hw, &local->radar_detected_work); 2674 } 2675 EXPORT_SYMBOL(ieee80211_radar_detected); 2676 2677 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 2678 { 2679 u32 ret; 2680 int tmp; 2681 2682 switch (c->width) { 2683 case NL80211_CHAN_WIDTH_20: 2684 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2685 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2686 break; 2687 case NL80211_CHAN_WIDTH_40: 2688 c->width = NL80211_CHAN_WIDTH_20; 2689 c->center_freq1 = c->chan->center_freq; 2690 ret = IEEE80211_STA_DISABLE_40MHZ | 2691 IEEE80211_STA_DISABLE_VHT; 2692 break; 2693 case NL80211_CHAN_WIDTH_80: 2694 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 2695 /* n_P40 */ 2696 tmp /= 2; 2697 /* freq_P40 */ 2698 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 2699 c->width = NL80211_CHAN_WIDTH_40; 2700 ret = IEEE80211_STA_DISABLE_VHT; 2701 break; 2702 case NL80211_CHAN_WIDTH_80P80: 2703 c->center_freq2 = 0; 2704 c->width = NL80211_CHAN_WIDTH_80; 2705 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2706 IEEE80211_STA_DISABLE_160MHZ; 2707 break; 2708 case NL80211_CHAN_WIDTH_160: 2709 /* n_P20 */ 2710 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 2711 /* n_P80 */ 2712 tmp /= 4; 2713 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 2714 c->width = NL80211_CHAN_WIDTH_80; 2715 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2716 IEEE80211_STA_DISABLE_160MHZ; 2717 break; 2718 default: 2719 case NL80211_CHAN_WIDTH_20_NOHT: 2720 WARN_ON_ONCE(1); 2721 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2722 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2723 break; 2724 case NL80211_CHAN_WIDTH_5: 2725 case NL80211_CHAN_WIDTH_10: 2726 WARN_ON_ONCE(1); 2727 /* keep c->width */ 2728 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2729 break; 2730 } 2731 2732 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 2733 2734 return ret; 2735 } 2736 2737 /* 2738 * Returns true if smps_mode_new is strictly more restrictive than 2739 * smps_mode_old. 2740 */ 2741 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 2742 enum ieee80211_smps_mode smps_mode_new) 2743 { 2744 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 2745 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 2746 return false; 2747 2748 switch (smps_mode_old) { 2749 case IEEE80211_SMPS_STATIC: 2750 return false; 2751 case IEEE80211_SMPS_DYNAMIC: 2752 return smps_mode_new == IEEE80211_SMPS_STATIC; 2753 case IEEE80211_SMPS_OFF: 2754 return smps_mode_new != IEEE80211_SMPS_OFF; 2755 default: 2756 WARN_ON(1); 2757 } 2758 2759 return false; 2760 } 2761 2762 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 2763 struct cfg80211_csa_settings *csa_settings) 2764 { 2765 struct sk_buff *skb; 2766 struct ieee80211_mgmt *mgmt; 2767 struct ieee80211_local *local = sdata->local; 2768 int freq; 2769 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) + 2770 sizeof(mgmt->u.action.u.chan_switch); 2771 u8 *pos; 2772 2773 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 2774 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 2775 return -EOPNOTSUPP; 2776 2777 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 2778 5 + /* channel switch announcement element */ 2779 3 + /* secondary channel offset element */ 2780 8); /* mesh channel switch parameters element */ 2781 if (!skb) 2782 return -ENOMEM; 2783 2784 skb_reserve(skb, local->tx_headroom); 2785 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len); 2786 memset(mgmt, 0, hdr_len); 2787 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2788 IEEE80211_STYPE_ACTION); 2789 2790 eth_broadcast_addr(mgmt->da); 2791 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2792 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2793 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 2794 } else { 2795 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 2796 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 2797 } 2798 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 2799 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 2800 pos = skb_put(skb, 5); 2801 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 2802 *pos++ = 3; /* IE length */ 2803 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 2804 freq = csa_settings->chandef.chan->center_freq; 2805 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 2806 *pos++ = csa_settings->count; /* count */ 2807 2808 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 2809 enum nl80211_channel_type ch_type; 2810 2811 skb_put(skb, 3); 2812 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 2813 *pos++ = 1; /* IE length */ 2814 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 2815 if (ch_type == NL80211_CHAN_HT40PLUS) 2816 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2817 else 2818 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2819 } 2820 2821 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2822 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 2823 2824 skb_put(skb, 8); 2825 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 2826 *pos++ = 6; /* IE length */ 2827 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 2828 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 2829 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 2830 *pos++ |= csa_settings->block_tx ? 2831 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 2832 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 2833 pos += 2; 2834 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 2835 pos += 2; 2836 } 2837 2838 ieee80211_tx_skb(sdata, skb); 2839 return 0; 2840 } 2841 2842 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 2843 { 2844 return !(cs == NULL || cs->cipher == 0 || 2845 cs->hdr_len < cs->pn_len + cs->pn_off || 2846 cs->hdr_len <= cs->key_idx_off || 2847 cs->key_idx_shift > 7 || 2848 cs->key_idx_mask == 0); 2849 } 2850 2851 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 2852 { 2853 int i; 2854 2855 /* Ensure we have enough iftype bitmap space for all iftype values */ 2856 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 2857 2858 for (i = 0; i < n; i++) 2859 if (!ieee80211_cs_valid(&cs[i])) 2860 return false; 2861 2862 return true; 2863 } 2864 2865 const struct ieee80211_cipher_scheme * 2866 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 2867 enum nl80211_iftype iftype) 2868 { 2869 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 2870 int n = local->hw.n_cipher_schemes; 2871 int i; 2872 const struct ieee80211_cipher_scheme *cs = NULL; 2873 2874 for (i = 0; i < n; i++) { 2875 if (l[i].cipher == cipher) { 2876 cs = &l[i]; 2877 break; 2878 } 2879 } 2880 2881 if (!cs || !(cs->iftype & BIT(iftype))) 2882 return NULL; 2883 2884 return cs; 2885 } 2886 2887 int ieee80211_cs_headroom(struct ieee80211_local *local, 2888 struct cfg80211_crypto_settings *crypto, 2889 enum nl80211_iftype iftype) 2890 { 2891 const struct ieee80211_cipher_scheme *cs; 2892 int headroom = IEEE80211_ENCRYPT_HEADROOM; 2893 int i; 2894 2895 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 2896 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 2897 iftype); 2898 2899 if (cs && headroom < cs->hdr_len) 2900 headroom = cs->hdr_len; 2901 } 2902 2903 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 2904 if (cs && headroom < cs->hdr_len) 2905 headroom = cs->hdr_len; 2906 2907 return headroom; 2908 } 2909 2910 static bool 2911 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 2912 { 2913 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 2914 int skip; 2915 2916 if (end > 0) 2917 return false; 2918 2919 /* End time is in the past, check for repetitions */ 2920 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 2921 if (data->count[i] < 255) { 2922 if (data->count[i] <= skip) { 2923 data->count[i] = 0; 2924 return false; 2925 } 2926 2927 data->count[i] -= skip; 2928 } 2929 2930 data->desc[i].start += skip * data->desc[i].interval; 2931 2932 return true; 2933 } 2934 2935 static bool 2936 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 2937 s32 *offset) 2938 { 2939 bool ret = false; 2940 int i; 2941 2942 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 2943 s32 cur; 2944 2945 if (!data->count[i]) 2946 continue; 2947 2948 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 2949 ret = true; 2950 2951 cur = data->desc[i].start - tsf; 2952 if (cur > *offset) 2953 continue; 2954 2955 cur = data->desc[i].start + data->desc[i].duration - tsf; 2956 if (cur > *offset) 2957 *offset = cur; 2958 } 2959 2960 return ret; 2961 } 2962 2963 static u32 2964 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 2965 { 2966 s32 offset = 0; 2967 int tries = 0; 2968 /* 2969 * arbitrary limit, used to avoid infinite loops when combined NoA 2970 * descriptors cover the full time period. 2971 */ 2972 int max_tries = 5; 2973 2974 ieee80211_extend_absent_time(data, tsf, &offset); 2975 do { 2976 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 2977 break; 2978 2979 tries++; 2980 } while (tries < max_tries); 2981 2982 return offset; 2983 } 2984 2985 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 2986 { 2987 u32 next_offset = BIT(31) - 1; 2988 int i; 2989 2990 data->absent = 0; 2991 data->has_next_tsf = false; 2992 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 2993 s32 start; 2994 2995 if (!data->count[i]) 2996 continue; 2997 2998 ieee80211_extend_noa_desc(data, tsf, i); 2999 start = data->desc[i].start - tsf; 3000 if (start <= 0) 3001 data->absent |= BIT(i); 3002 3003 if (next_offset > start) 3004 next_offset = start; 3005 3006 data->has_next_tsf = true; 3007 } 3008 3009 if (data->absent) 3010 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3011 3012 data->next_tsf = tsf + next_offset; 3013 } 3014 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3015 3016 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3017 struct ieee80211_noa_data *data, u32 tsf) 3018 { 3019 int ret = 0; 3020 int i; 3021 3022 memset(data, 0, sizeof(*data)); 3023 3024 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3025 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3026 3027 if (!desc->count || !desc->duration) 3028 continue; 3029 3030 data->count[i] = desc->count; 3031 data->desc[i].start = le32_to_cpu(desc->start_time); 3032 data->desc[i].duration = le32_to_cpu(desc->duration); 3033 data->desc[i].interval = le32_to_cpu(desc->interval); 3034 3035 if (data->count[i] > 1 && 3036 data->desc[i].interval < data->desc[i].duration) 3037 continue; 3038 3039 ieee80211_extend_noa_desc(data, tsf, i); 3040 ret++; 3041 } 3042 3043 if (ret) 3044 ieee80211_update_p2p_noa(data, tsf); 3045 3046 return ret; 3047 } 3048 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3049 3050 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3051 struct ieee80211_sub_if_data *sdata) 3052 { 3053 u64 tsf = drv_get_tsf(local, sdata); 3054 u64 dtim_count = 0; 3055 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3056 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3057 struct ps_data *ps; 3058 u8 bcns_from_dtim; 3059 3060 if (tsf == -1ULL || !beacon_int || !dtim_period) 3061 return; 3062 3063 if (sdata->vif.type == NL80211_IFTYPE_AP || 3064 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3065 if (!sdata->bss) 3066 return; 3067 3068 ps = &sdata->bss->ps; 3069 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3070 ps = &sdata->u.mesh.ps; 3071 } else { 3072 return; 3073 } 3074 3075 /* 3076 * actually finds last dtim_count, mac80211 will update in 3077 * __beacon_add_tim(). 3078 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3079 */ 3080 do_div(tsf, beacon_int); 3081 bcns_from_dtim = do_div(tsf, dtim_period); 3082 /* just had a DTIM */ 3083 if (!bcns_from_dtim) 3084 dtim_count = 0; 3085 else 3086 dtim_count = dtim_period - bcns_from_dtim; 3087 3088 ps->dtim_count = dtim_count; 3089 } 3090 3091 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3092 struct ieee80211_chanctx *ctx) 3093 { 3094 struct ieee80211_sub_if_data *sdata; 3095 u8 radar_detect = 0; 3096 3097 lockdep_assert_held(&local->chanctx_mtx); 3098 3099 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3100 return 0; 3101 3102 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3103 if (sdata->reserved_radar_required) 3104 radar_detect |= BIT(sdata->reserved_chandef.width); 3105 3106 /* 3107 * An in-place reservation context should not have any assigned vifs 3108 * until it replaces the other context. 3109 */ 3110 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3111 !list_empty(&ctx->assigned_vifs)); 3112 3113 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3114 if (sdata->radar_required) 3115 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3116 3117 return radar_detect; 3118 } 3119 3120 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3121 const struct cfg80211_chan_def *chandef, 3122 enum ieee80211_chanctx_mode chanmode, 3123 u8 radar_detect) 3124 { 3125 struct ieee80211_local *local = sdata->local; 3126 struct ieee80211_sub_if_data *sdata_iter; 3127 enum nl80211_iftype iftype = sdata->wdev.iftype; 3128 int num[NUM_NL80211_IFTYPES]; 3129 struct ieee80211_chanctx *ctx; 3130 int num_different_channels = 0; 3131 int total = 1; 3132 3133 lockdep_assert_held(&local->chanctx_mtx); 3134 3135 if (WARN_ON(hweight32(radar_detect) > 1)) 3136 return -EINVAL; 3137 3138 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3139 !chandef->chan)) 3140 return -EINVAL; 3141 3142 if (chandef) 3143 num_different_channels = 1; 3144 3145 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3146 return -EINVAL; 3147 3148 /* Always allow software iftypes */ 3149 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3150 if (radar_detect) 3151 return -EINVAL; 3152 return 0; 3153 } 3154 3155 memset(num, 0, sizeof(num)); 3156 3157 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3158 num[iftype] = 1; 3159 3160 list_for_each_entry(ctx, &local->chanctx_list, list) { 3161 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3162 continue; 3163 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3164 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3165 num_different_channels++; 3166 continue; 3167 } 3168 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3169 cfg80211_chandef_compatible(chandef, 3170 &ctx->conf.def)) 3171 continue; 3172 num_different_channels++; 3173 } 3174 3175 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3176 struct wireless_dev *wdev_iter; 3177 3178 wdev_iter = &sdata_iter->wdev; 3179 3180 if (sdata_iter == sdata || 3181 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL || 3182 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3183 continue; 3184 3185 num[wdev_iter->iftype]++; 3186 total++; 3187 } 3188 3189 if (total == 1 && !radar_detect) 3190 return 0; 3191 3192 return cfg80211_check_combinations(local->hw.wiphy, 3193 num_different_channels, 3194 radar_detect, num); 3195 } 3196 3197 static void 3198 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3199 void *data) 3200 { 3201 u32 *max_num_different_channels = data; 3202 3203 *max_num_different_channels = max(*max_num_different_channels, 3204 c->num_different_channels); 3205 } 3206 3207 int ieee80211_max_num_channels(struct ieee80211_local *local) 3208 { 3209 struct ieee80211_sub_if_data *sdata; 3210 int num[NUM_NL80211_IFTYPES] = {}; 3211 struct ieee80211_chanctx *ctx; 3212 int num_different_channels = 0; 3213 u8 radar_detect = 0; 3214 u32 max_num_different_channels = 1; 3215 int err; 3216 3217 lockdep_assert_held(&local->chanctx_mtx); 3218 3219 list_for_each_entry(ctx, &local->chanctx_list, list) { 3220 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3221 continue; 3222 3223 num_different_channels++; 3224 3225 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3226 } 3227 3228 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3229 num[sdata->wdev.iftype]++; 3230 3231 err = cfg80211_iter_combinations(local->hw.wiphy, 3232 num_different_channels, radar_detect, 3233 num, ieee80211_iter_max_chans, 3234 &max_num_different_channels); 3235 if (err < 0) 3236 return err; 3237 3238 return max_num_different_channels; 3239 } 3240 3241 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3242 { 3243 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3244 *buf++ = 7; /* len */ 3245 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3246 *buf++ = 0x50; 3247 *buf++ = 0xf2; 3248 *buf++ = 2; /* WME */ 3249 *buf++ = 0; /* WME info */ 3250 *buf++ = 1; /* WME ver */ 3251 *buf++ = qosinfo; /* U-APSD no in use */ 3252 3253 return buf; 3254 } 3255