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) 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, false); 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) 606 { 607 __ieee80211_flush_queues(local, sdata, 0); 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. If this WARN is seen then there 748 * is a bug with either the driver suspend or something in 749 * mac80211 stuffing into the workqueue which we haven't yet 750 * cleared during mac80211's suspend cycle. 751 */ 752 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 753 { 754 if (WARN(local->suspended && !local->resuming, 755 "queueing ieee80211 work while going to suspend\n")) 756 return false; 757 758 return true; 759 } 760 761 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 762 { 763 struct ieee80211_local *local = hw_to_local(hw); 764 765 if (!ieee80211_can_queue_work(local)) 766 return; 767 768 queue_work(local->workqueue, work); 769 } 770 EXPORT_SYMBOL(ieee80211_queue_work); 771 772 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 773 struct delayed_work *dwork, 774 unsigned long delay) 775 { 776 struct ieee80211_local *local = hw_to_local(hw); 777 778 if (!ieee80211_can_queue_work(local)) 779 return; 780 781 queue_delayed_work(local->workqueue, dwork, delay); 782 } 783 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 784 785 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 786 struct ieee802_11_elems *elems, 787 u64 filter, u32 crc) 788 { 789 size_t left = len; 790 const u8 *pos = start; 791 bool calc_crc = filter != 0; 792 DECLARE_BITMAP(seen_elems, 256); 793 const u8 *ie; 794 795 bitmap_zero(seen_elems, 256); 796 memset(elems, 0, sizeof(*elems)); 797 elems->ie_start = start; 798 elems->total_len = len; 799 800 while (left >= 2) { 801 u8 id, elen; 802 bool elem_parse_failed; 803 804 id = *pos++; 805 elen = *pos++; 806 left -= 2; 807 808 if (elen > left) { 809 elems->parse_error = true; 810 break; 811 } 812 813 switch (id) { 814 case WLAN_EID_SSID: 815 case WLAN_EID_SUPP_RATES: 816 case WLAN_EID_FH_PARAMS: 817 case WLAN_EID_DS_PARAMS: 818 case WLAN_EID_CF_PARAMS: 819 case WLAN_EID_TIM: 820 case WLAN_EID_IBSS_PARAMS: 821 case WLAN_EID_CHALLENGE: 822 case WLAN_EID_RSN: 823 case WLAN_EID_ERP_INFO: 824 case WLAN_EID_EXT_SUPP_RATES: 825 case WLAN_EID_HT_CAPABILITY: 826 case WLAN_EID_HT_OPERATION: 827 case WLAN_EID_VHT_CAPABILITY: 828 case WLAN_EID_VHT_OPERATION: 829 case WLAN_EID_MESH_ID: 830 case WLAN_EID_MESH_CONFIG: 831 case WLAN_EID_PEER_MGMT: 832 case WLAN_EID_PREQ: 833 case WLAN_EID_PREP: 834 case WLAN_EID_PERR: 835 case WLAN_EID_RANN: 836 case WLAN_EID_CHANNEL_SWITCH: 837 case WLAN_EID_EXT_CHANSWITCH_ANN: 838 case WLAN_EID_COUNTRY: 839 case WLAN_EID_PWR_CONSTRAINT: 840 case WLAN_EID_TIMEOUT_INTERVAL: 841 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 842 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 843 case WLAN_EID_CHAN_SWITCH_PARAM: 844 case WLAN_EID_EXT_CAPABILITY: 845 case WLAN_EID_CHAN_SWITCH_TIMING: 846 case WLAN_EID_LINK_ID: 847 /* 848 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 849 * that if the content gets bigger it might be needed more than once 850 */ 851 if (test_bit(id, seen_elems)) { 852 elems->parse_error = true; 853 left -= elen; 854 pos += elen; 855 continue; 856 } 857 break; 858 } 859 860 if (calc_crc && id < 64 && (filter & (1ULL << id))) 861 crc = crc32_be(crc, pos - 2, elen + 2); 862 863 elem_parse_failed = false; 864 865 switch (id) { 866 case WLAN_EID_LINK_ID: 867 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 868 elem_parse_failed = true; 869 break; 870 } 871 elems->lnk_id = (void *)(pos - 2); 872 break; 873 case WLAN_EID_CHAN_SWITCH_TIMING: 874 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 875 elem_parse_failed = true; 876 break; 877 } 878 elems->ch_sw_timing = (void *)pos; 879 break; 880 case WLAN_EID_EXT_CAPABILITY: 881 elems->ext_capab = pos; 882 elems->ext_capab_len = elen; 883 break; 884 case WLAN_EID_SSID: 885 elems->ssid = pos; 886 elems->ssid_len = elen; 887 break; 888 case WLAN_EID_SUPP_RATES: 889 elems->supp_rates = pos; 890 elems->supp_rates_len = elen; 891 break; 892 case WLAN_EID_DS_PARAMS: 893 if (elen >= 1) 894 elems->ds_params = pos; 895 else 896 elem_parse_failed = true; 897 break; 898 case WLAN_EID_TIM: 899 if (elen >= sizeof(struct ieee80211_tim_ie)) { 900 elems->tim = (void *)pos; 901 elems->tim_len = elen; 902 } else 903 elem_parse_failed = true; 904 break; 905 case WLAN_EID_CHALLENGE: 906 elems->challenge = pos; 907 elems->challenge_len = elen; 908 break; 909 case WLAN_EID_VENDOR_SPECIFIC: 910 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 911 pos[2] == 0xf2) { 912 /* Microsoft OUI (00:50:F2) */ 913 914 if (calc_crc) 915 crc = crc32_be(crc, pos - 2, elen + 2); 916 917 if (elen >= 5 && pos[3] == 2) { 918 /* OUI Type 2 - WMM IE */ 919 if (pos[4] == 0) { 920 elems->wmm_info = pos; 921 elems->wmm_info_len = elen; 922 } else if (pos[4] == 1) { 923 elems->wmm_param = pos; 924 elems->wmm_param_len = elen; 925 } 926 } 927 } 928 break; 929 case WLAN_EID_RSN: 930 elems->rsn = pos; 931 elems->rsn_len = elen; 932 break; 933 case WLAN_EID_ERP_INFO: 934 if (elen >= 1) 935 elems->erp_info = pos; 936 else 937 elem_parse_failed = true; 938 break; 939 case WLAN_EID_EXT_SUPP_RATES: 940 elems->ext_supp_rates = pos; 941 elems->ext_supp_rates_len = elen; 942 break; 943 case WLAN_EID_HT_CAPABILITY: 944 if (elen >= sizeof(struct ieee80211_ht_cap)) 945 elems->ht_cap_elem = (void *)pos; 946 else 947 elem_parse_failed = true; 948 break; 949 case WLAN_EID_HT_OPERATION: 950 if (elen >= sizeof(struct ieee80211_ht_operation)) 951 elems->ht_operation = (void *)pos; 952 else 953 elem_parse_failed = true; 954 break; 955 case WLAN_EID_VHT_CAPABILITY: 956 if (elen >= sizeof(struct ieee80211_vht_cap)) 957 elems->vht_cap_elem = (void *)pos; 958 else 959 elem_parse_failed = true; 960 break; 961 case WLAN_EID_VHT_OPERATION: 962 if (elen >= sizeof(struct ieee80211_vht_operation)) 963 elems->vht_operation = (void *)pos; 964 else 965 elem_parse_failed = true; 966 break; 967 case WLAN_EID_OPMODE_NOTIF: 968 if (elen > 0) 969 elems->opmode_notif = pos; 970 else 971 elem_parse_failed = true; 972 break; 973 case WLAN_EID_MESH_ID: 974 elems->mesh_id = pos; 975 elems->mesh_id_len = elen; 976 break; 977 case WLAN_EID_MESH_CONFIG: 978 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 979 elems->mesh_config = (void *)pos; 980 else 981 elem_parse_failed = true; 982 break; 983 case WLAN_EID_PEER_MGMT: 984 elems->peering = pos; 985 elems->peering_len = elen; 986 break; 987 case WLAN_EID_MESH_AWAKE_WINDOW: 988 if (elen >= 2) 989 elems->awake_window = (void *)pos; 990 break; 991 case WLAN_EID_PREQ: 992 elems->preq = pos; 993 elems->preq_len = elen; 994 break; 995 case WLAN_EID_PREP: 996 elems->prep = pos; 997 elems->prep_len = elen; 998 break; 999 case WLAN_EID_PERR: 1000 elems->perr = pos; 1001 elems->perr_len = elen; 1002 break; 1003 case WLAN_EID_RANN: 1004 if (elen >= sizeof(struct ieee80211_rann_ie)) 1005 elems->rann = (void *)pos; 1006 else 1007 elem_parse_failed = true; 1008 break; 1009 case WLAN_EID_CHANNEL_SWITCH: 1010 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1011 elem_parse_failed = true; 1012 break; 1013 } 1014 elems->ch_switch_ie = (void *)pos; 1015 break; 1016 case WLAN_EID_EXT_CHANSWITCH_ANN: 1017 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1018 elem_parse_failed = true; 1019 break; 1020 } 1021 elems->ext_chansw_ie = (void *)pos; 1022 break; 1023 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1024 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1025 elem_parse_failed = true; 1026 break; 1027 } 1028 elems->sec_chan_offs = (void *)pos; 1029 break; 1030 case WLAN_EID_CHAN_SWITCH_PARAM: 1031 if (elen != 1032 sizeof(*elems->mesh_chansw_params_ie)) { 1033 elem_parse_failed = true; 1034 break; 1035 } 1036 elems->mesh_chansw_params_ie = (void *)pos; 1037 break; 1038 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1039 if (!action || 1040 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1041 elem_parse_failed = true; 1042 break; 1043 } 1044 elems->wide_bw_chansw_ie = (void *)pos; 1045 break; 1046 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1047 if (action) { 1048 elem_parse_failed = true; 1049 break; 1050 } 1051 /* 1052 * This is a bit tricky, but as we only care about 1053 * the wide bandwidth channel switch element, so 1054 * just parse it out manually. 1055 */ 1056 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1057 pos, elen); 1058 if (ie) { 1059 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1060 elems->wide_bw_chansw_ie = 1061 (void *)(ie + 2); 1062 else 1063 elem_parse_failed = true; 1064 } 1065 break; 1066 case WLAN_EID_COUNTRY: 1067 elems->country_elem = pos; 1068 elems->country_elem_len = elen; 1069 break; 1070 case WLAN_EID_PWR_CONSTRAINT: 1071 if (elen != 1) { 1072 elem_parse_failed = true; 1073 break; 1074 } 1075 elems->pwr_constr_elem = pos; 1076 break; 1077 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1078 /* Lots of different options exist, but we only care 1079 * about the Dynamic Transmit Power Control element. 1080 * First check for the Cisco OUI, then for the DTPC 1081 * tag (0x00). 1082 */ 1083 if (elen < 4) { 1084 elem_parse_failed = true; 1085 break; 1086 } 1087 1088 if (pos[0] != 0x00 || pos[1] != 0x40 || 1089 pos[2] != 0x96 || pos[3] != 0x00) 1090 break; 1091 1092 if (elen != 6) { 1093 elem_parse_failed = true; 1094 break; 1095 } 1096 1097 if (calc_crc) 1098 crc = crc32_be(crc, pos - 2, elen + 2); 1099 1100 elems->cisco_dtpc_elem = pos; 1101 break; 1102 case WLAN_EID_TIMEOUT_INTERVAL: 1103 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1104 elems->timeout_int = (void *)pos; 1105 else 1106 elem_parse_failed = true; 1107 break; 1108 default: 1109 break; 1110 } 1111 1112 if (elem_parse_failed) 1113 elems->parse_error = true; 1114 else 1115 __set_bit(id, seen_elems); 1116 1117 left -= elen; 1118 pos += elen; 1119 } 1120 1121 if (left != 0) 1122 elems->parse_error = true; 1123 1124 return crc; 1125 } 1126 1127 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1128 bool bss_notify) 1129 { 1130 struct ieee80211_local *local = sdata->local; 1131 struct ieee80211_tx_queue_params qparam; 1132 struct ieee80211_chanctx_conf *chanctx_conf; 1133 int ac; 1134 bool use_11b, enable_qos; 1135 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1136 int aCWmin, aCWmax; 1137 1138 if (!local->ops->conf_tx) 1139 return; 1140 1141 if (local->hw.queues < IEEE80211_NUM_ACS) 1142 return; 1143 1144 memset(&qparam, 0, sizeof(qparam)); 1145 1146 rcu_read_lock(); 1147 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1148 use_11b = (chanctx_conf && 1149 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) && 1150 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1151 rcu_read_unlock(); 1152 1153 /* 1154 * By default disable QoS in STA mode for old access points, which do 1155 * not support 802.11e. New APs will provide proper queue parameters, 1156 * that we will configure later. 1157 */ 1158 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION); 1159 1160 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1161 1162 /* Set defaults according to 802.11-2007 Table 7-37 */ 1163 aCWmax = 1023; 1164 if (use_11b) 1165 aCWmin = 31; 1166 else 1167 aCWmin = 15; 1168 1169 /* Confiure old 802.11b/g medium access rules. */ 1170 qparam.cw_max = aCWmax; 1171 qparam.cw_min = aCWmin; 1172 qparam.txop = 0; 1173 qparam.aifs = 2; 1174 1175 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1176 /* Update if QoS is enabled. */ 1177 if (enable_qos) { 1178 switch (ac) { 1179 case IEEE80211_AC_BK: 1180 qparam.cw_max = aCWmax; 1181 qparam.cw_min = aCWmin; 1182 qparam.txop = 0; 1183 if (is_ocb) 1184 qparam.aifs = 9; 1185 else 1186 qparam.aifs = 7; 1187 break; 1188 /* never happens but let's not leave undefined */ 1189 default: 1190 case IEEE80211_AC_BE: 1191 qparam.cw_max = aCWmax; 1192 qparam.cw_min = aCWmin; 1193 qparam.txop = 0; 1194 if (is_ocb) 1195 qparam.aifs = 6; 1196 else 1197 qparam.aifs = 3; 1198 break; 1199 case IEEE80211_AC_VI: 1200 qparam.cw_max = aCWmin; 1201 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1202 if (is_ocb) 1203 qparam.txop = 0; 1204 else if (use_11b) 1205 qparam.txop = 6016/32; 1206 else 1207 qparam.txop = 3008/32; 1208 1209 if (is_ocb) 1210 qparam.aifs = 3; 1211 else 1212 qparam.aifs = 2; 1213 break; 1214 case IEEE80211_AC_VO: 1215 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1216 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1217 if (is_ocb) 1218 qparam.txop = 0; 1219 else if (use_11b) 1220 qparam.txop = 3264/32; 1221 else 1222 qparam.txop = 1504/32; 1223 qparam.aifs = 2; 1224 break; 1225 } 1226 } 1227 1228 qparam.uapsd = false; 1229 1230 sdata->tx_conf[ac] = qparam; 1231 drv_conf_tx(local, sdata, ac, &qparam); 1232 } 1233 1234 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1235 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { 1236 sdata->vif.bss_conf.qos = enable_qos; 1237 if (bss_notify) 1238 ieee80211_bss_info_change_notify(sdata, 1239 BSS_CHANGED_QOS); 1240 } 1241 } 1242 1243 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1244 u16 transaction, u16 auth_alg, u16 status, 1245 const u8 *extra, size_t extra_len, const u8 *da, 1246 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1247 u32 tx_flags) 1248 { 1249 struct ieee80211_local *local = sdata->local; 1250 struct sk_buff *skb; 1251 struct ieee80211_mgmt *mgmt; 1252 int err; 1253 1254 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1255 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1256 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1257 if (!skb) 1258 return; 1259 1260 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1261 1262 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); 1263 memset(mgmt, 0, 24 + 6); 1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1265 IEEE80211_STYPE_AUTH); 1266 memcpy(mgmt->da, da, ETH_ALEN); 1267 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1268 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1269 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1270 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1271 mgmt->u.auth.status_code = cpu_to_le16(status); 1272 if (extra) 1273 memcpy(skb_put(skb, extra_len), extra, extra_len); 1274 1275 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1276 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1277 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1278 WARN_ON(err); 1279 } 1280 1281 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1282 tx_flags; 1283 ieee80211_tx_skb(sdata, skb); 1284 } 1285 1286 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1287 const u8 *bssid, u16 stype, u16 reason, 1288 bool send_frame, u8 *frame_buf) 1289 { 1290 struct ieee80211_local *local = sdata->local; 1291 struct sk_buff *skb; 1292 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1293 1294 /* build frame */ 1295 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1296 mgmt->duration = 0; /* initialize only */ 1297 mgmt->seq_ctrl = 0; /* initialize only */ 1298 memcpy(mgmt->da, bssid, ETH_ALEN); 1299 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1300 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1301 /* u.deauth.reason_code == u.disassoc.reason_code */ 1302 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1303 1304 if (send_frame) { 1305 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1306 IEEE80211_DEAUTH_FRAME_LEN); 1307 if (!skb) 1308 return; 1309 1310 skb_reserve(skb, local->hw.extra_tx_headroom); 1311 1312 /* copy in frame */ 1313 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), 1314 mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1315 1316 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1317 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1318 IEEE80211_SKB_CB(skb)->flags |= 1319 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1320 1321 ieee80211_tx_skb(sdata, skb); 1322 } 1323 } 1324 1325 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1326 u8 *buffer, size_t buffer_len, 1327 const u8 *ie, size_t ie_len, 1328 enum ieee80211_band band, 1329 u32 rate_mask, 1330 struct cfg80211_chan_def *chandef, 1331 size_t *offset) 1332 { 1333 struct ieee80211_supported_band *sband; 1334 u8 *pos = buffer, *end = buffer + buffer_len; 1335 size_t noffset; 1336 int supp_rates_len, i; 1337 u8 rates[32]; 1338 int num_rates; 1339 int ext_rates_len; 1340 int shift; 1341 u32 rate_flags; 1342 bool have_80mhz = false; 1343 1344 *offset = 0; 1345 1346 sband = local->hw.wiphy->bands[band]; 1347 if (WARN_ON_ONCE(!sband)) 1348 return 0; 1349 1350 rate_flags = ieee80211_chandef_rate_flags(chandef); 1351 shift = ieee80211_chandef_get_shift(chandef); 1352 1353 num_rates = 0; 1354 for (i = 0; i < sband->n_bitrates; i++) { 1355 if ((BIT(i) & rate_mask) == 0) 1356 continue; /* skip rate */ 1357 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1358 continue; 1359 1360 rates[num_rates++] = 1361 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1362 (1 << shift) * 5); 1363 } 1364 1365 supp_rates_len = min_t(int, num_rates, 8); 1366 1367 if (end - pos < 2 + supp_rates_len) 1368 goto out_err; 1369 *pos++ = WLAN_EID_SUPP_RATES; 1370 *pos++ = supp_rates_len; 1371 memcpy(pos, rates, supp_rates_len); 1372 pos += supp_rates_len; 1373 1374 /* insert "request information" if in custom IEs */ 1375 if (ie && ie_len) { 1376 static const u8 before_extrates[] = { 1377 WLAN_EID_SSID, 1378 WLAN_EID_SUPP_RATES, 1379 WLAN_EID_REQUEST, 1380 }; 1381 noffset = ieee80211_ie_split(ie, ie_len, 1382 before_extrates, 1383 ARRAY_SIZE(before_extrates), 1384 *offset); 1385 if (end - pos < noffset - *offset) 1386 goto out_err; 1387 memcpy(pos, ie + *offset, noffset - *offset); 1388 pos += noffset - *offset; 1389 *offset = noffset; 1390 } 1391 1392 ext_rates_len = num_rates - supp_rates_len; 1393 if (ext_rates_len > 0) { 1394 if (end - pos < 2 + ext_rates_len) 1395 goto out_err; 1396 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1397 *pos++ = ext_rates_len; 1398 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1399 pos += ext_rates_len; 1400 } 1401 1402 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) { 1403 if (end - pos < 3) 1404 goto out_err; 1405 *pos++ = WLAN_EID_DS_PARAMS; 1406 *pos++ = 1; 1407 *pos++ = ieee80211_frequency_to_channel( 1408 chandef->chan->center_freq); 1409 } 1410 1411 /* insert custom IEs that go before HT */ 1412 if (ie && ie_len) { 1413 static const u8 before_ht[] = { 1414 WLAN_EID_SSID, 1415 WLAN_EID_SUPP_RATES, 1416 WLAN_EID_REQUEST, 1417 WLAN_EID_EXT_SUPP_RATES, 1418 WLAN_EID_DS_PARAMS, 1419 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1420 }; 1421 noffset = ieee80211_ie_split(ie, ie_len, 1422 before_ht, ARRAY_SIZE(before_ht), 1423 *offset); 1424 if (end - pos < noffset - *offset) 1425 goto out_err; 1426 memcpy(pos, ie + *offset, noffset - *offset); 1427 pos += noffset - *offset; 1428 *offset = noffset; 1429 } 1430 1431 if (sband->ht_cap.ht_supported) { 1432 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1433 goto out_err; 1434 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1435 sband->ht_cap.cap); 1436 } 1437 1438 /* 1439 * If adding more here, adjust code in main.c 1440 * that calculates local->scan_ies_len. 1441 */ 1442 1443 /* insert custom IEs that go before VHT */ 1444 if (ie && ie_len) { 1445 static const u8 before_vht[] = { 1446 WLAN_EID_SSID, 1447 WLAN_EID_SUPP_RATES, 1448 WLAN_EID_REQUEST, 1449 WLAN_EID_EXT_SUPP_RATES, 1450 WLAN_EID_DS_PARAMS, 1451 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1452 WLAN_EID_HT_CAPABILITY, 1453 WLAN_EID_BSS_COEX_2040, 1454 WLAN_EID_EXT_CAPABILITY, 1455 WLAN_EID_SSID_LIST, 1456 WLAN_EID_CHANNEL_USAGE, 1457 WLAN_EID_INTERWORKING, 1458 /* mesh ID can't happen here */ 1459 /* 60 GHz can't happen here right now */ 1460 }; 1461 noffset = ieee80211_ie_split(ie, ie_len, 1462 before_vht, ARRAY_SIZE(before_vht), 1463 *offset); 1464 if (end - pos < noffset - *offset) 1465 goto out_err; 1466 memcpy(pos, ie + *offset, noffset - *offset); 1467 pos += noffset - *offset; 1468 *offset = noffset; 1469 } 1470 1471 /* Check if any channel in this sband supports at least 80 MHz */ 1472 for (i = 0; i < sband->n_channels; i++) { 1473 if (!(sband->channels[i].flags & IEEE80211_CHAN_NO_80MHZ)) { 1474 have_80mhz = true; 1475 break; 1476 } 1477 } 1478 1479 if (sband->vht_cap.vht_supported && have_80mhz) { 1480 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1481 goto out_err; 1482 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1483 sband->vht_cap.cap); 1484 } 1485 1486 return pos - buffer; 1487 out_err: 1488 WARN_ONCE(1, "not enough space for preq IEs\n"); 1489 return pos - buffer; 1490 } 1491 1492 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1493 size_t buffer_len, 1494 struct ieee80211_scan_ies *ie_desc, 1495 const u8 *ie, size_t ie_len, 1496 u8 bands_used, u32 *rate_masks, 1497 struct cfg80211_chan_def *chandef) 1498 { 1499 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1500 int i; 1501 1502 memset(ie_desc, 0, sizeof(*ie_desc)); 1503 1504 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1505 if (bands_used & BIT(i)) { 1506 pos += ieee80211_build_preq_ies_band(local, 1507 buffer + pos, 1508 buffer_len - pos, 1509 ie, ie_len, i, 1510 rate_masks[i], 1511 chandef, 1512 &custom_ie_offset); 1513 ie_desc->ies[i] = buffer + old_pos; 1514 ie_desc->len[i] = pos - old_pos; 1515 old_pos = pos; 1516 } 1517 } 1518 1519 /* add any remaining custom IEs */ 1520 if (ie && ie_len) { 1521 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1522 "not enough space for preq custom IEs\n")) 1523 return pos; 1524 memcpy(buffer + pos, ie + custom_ie_offset, 1525 ie_len - custom_ie_offset); 1526 ie_desc->common_ies = buffer + pos; 1527 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1528 pos += ie_len - custom_ie_offset; 1529 } 1530 1531 return pos; 1532 }; 1533 1534 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1535 const u8 *src, const u8 *dst, 1536 u32 ratemask, 1537 struct ieee80211_channel *chan, 1538 const u8 *ssid, size_t ssid_len, 1539 const u8 *ie, size_t ie_len, 1540 bool directed) 1541 { 1542 struct ieee80211_local *local = sdata->local; 1543 struct cfg80211_chan_def chandef; 1544 struct sk_buff *skb; 1545 struct ieee80211_mgmt *mgmt; 1546 int ies_len; 1547 u32 rate_masks[IEEE80211_NUM_BANDS] = {}; 1548 struct ieee80211_scan_ies dummy_ie_desc; 1549 1550 /* 1551 * Do not send DS Channel parameter for directed probe requests 1552 * in order to maximize the chance that we get a response. Some 1553 * badly-behaved APs don't respond when this parameter is included. 1554 */ 1555 chandef.width = sdata->vif.bss_conf.chandef.width; 1556 if (directed) 1557 chandef.chan = NULL; 1558 else 1559 chandef.chan = chan; 1560 1561 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1562 100 + ie_len); 1563 if (!skb) 1564 return NULL; 1565 1566 rate_masks[chan->band] = ratemask; 1567 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1568 skb_tailroom(skb), &dummy_ie_desc, 1569 ie, ie_len, BIT(chan->band), 1570 rate_masks, &chandef); 1571 skb_put(skb, ies_len); 1572 1573 if (dst) { 1574 mgmt = (struct ieee80211_mgmt *) skb->data; 1575 memcpy(mgmt->da, dst, ETH_ALEN); 1576 memcpy(mgmt->bssid, dst, ETH_ALEN); 1577 } 1578 1579 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1580 1581 return skb; 1582 } 1583 1584 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, 1585 const u8 *src, const u8 *dst, 1586 const u8 *ssid, size_t ssid_len, 1587 const u8 *ie, size_t ie_len, 1588 u32 ratemask, bool directed, u32 tx_flags, 1589 struct ieee80211_channel *channel, bool scan) 1590 { 1591 struct sk_buff *skb; 1592 1593 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, 1594 ssid, ssid_len, 1595 ie, ie_len, directed); 1596 if (skb) { 1597 IEEE80211_SKB_CB(skb)->flags |= tx_flags; 1598 if (scan) 1599 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); 1600 else 1601 ieee80211_tx_skb(sdata, skb); 1602 } 1603 } 1604 1605 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1606 struct ieee802_11_elems *elems, 1607 enum ieee80211_band band, u32 *basic_rates) 1608 { 1609 struct ieee80211_supported_band *sband; 1610 size_t num_rates; 1611 u32 supp_rates, rate_flags; 1612 int i, j, shift; 1613 sband = sdata->local->hw.wiphy->bands[band]; 1614 1615 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1616 shift = ieee80211_vif_get_shift(&sdata->vif); 1617 1618 if (WARN_ON(!sband)) 1619 return 1; 1620 1621 num_rates = sband->n_bitrates; 1622 supp_rates = 0; 1623 for (i = 0; i < elems->supp_rates_len + 1624 elems->ext_supp_rates_len; i++) { 1625 u8 rate = 0; 1626 int own_rate; 1627 bool is_basic; 1628 if (i < elems->supp_rates_len) 1629 rate = elems->supp_rates[i]; 1630 else if (elems->ext_supp_rates) 1631 rate = elems->ext_supp_rates 1632 [i - elems->supp_rates_len]; 1633 own_rate = 5 * (rate & 0x7f); 1634 is_basic = !!(rate & 0x80); 1635 1636 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1637 continue; 1638 1639 for (j = 0; j < num_rates; j++) { 1640 int brate; 1641 if ((rate_flags & sband->bitrates[j].flags) 1642 != rate_flags) 1643 continue; 1644 1645 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1646 1 << shift); 1647 1648 if (brate == own_rate) { 1649 supp_rates |= BIT(j); 1650 if (basic_rates && is_basic) 1651 *basic_rates |= BIT(j); 1652 } 1653 } 1654 } 1655 return supp_rates; 1656 } 1657 1658 void ieee80211_stop_device(struct ieee80211_local *local) 1659 { 1660 ieee80211_led_radio(local, false); 1661 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1662 1663 cancel_work_sync(&local->reconfig_filter); 1664 1665 flush_workqueue(local->workqueue); 1666 drv_stop(local); 1667 } 1668 1669 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1670 { 1671 struct ieee80211_sub_if_data *sdata; 1672 struct ieee80211_chanctx *ctx; 1673 1674 /* 1675 * We get here if during resume the device can't be restarted properly. 1676 * We might also get here if this happens during HW reset, which is a 1677 * slightly different situation and we need to drop all connections in 1678 * the latter case. 1679 * 1680 * Ask cfg80211 to turn off all interfaces, this will result in more 1681 * warnings but at least we'll then get into a clean stopped state. 1682 */ 1683 1684 local->resuming = false; 1685 local->suspended = false; 1686 local->started = false; 1687 1688 /* scheduled scan clearly can't be running any more, but tell 1689 * cfg80211 and clear local state 1690 */ 1691 ieee80211_sched_scan_end(local); 1692 1693 list_for_each_entry(sdata, &local->interfaces, list) 1694 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1695 1696 /* Mark channel contexts as not being in the driver any more to avoid 1697 * removing them from the driver during the shutdown process... 1698 */ 1699 mutex_lock(&local->chanctx_mtx); 1700 list_for_each_entry(ctx, &local->chanctx_list, list) 1701 ctx->driver_present = false; 1702 mutex_unlock(&local->chanctx_mtx); 1703 1704 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1705 } 1706 1707 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1708 struct ieee80211_sub_if_data *sdata) 1709 { 1710 struct ieee80211_chanctx_conf *conf; 1711 struct ieee80211_chanctx *ctx; 1712 1713 if (!local->use_chanctx) 1714 return; 1715 1716 mutex_lock(&local->chanctx_mtx); 1717 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1718 lockdep_is_held(&local->chanctx_mtx)); 1719 if (conf) { 1720 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1721 drv_assign_vif_chanctx(local, sdata, ctx); 1722 } 1723 mutex_unlock(&local->chanctx_mtx); 1724 } 1725 1726 int ieee80211_reconfig(struct ieee80211_local *local) 1727 { 1728 struct ieee80211_hw *hw = &local->hw; 1729 struct ieee80211_sub_if_data *sdata; 1730 struct ieee80211_chanctx *ctx; 1731 struct sta_info *sta; 1732 int res, i; 1733 bool reconfig_due_to_wowlan = false; 1734 struct ieee80211_sub_if_data *sched_scan_sdata; 1735 struct cfg80211_sched_scan_request *sched_scan_req; 1736 bool sched_scan_stopped = false; 1737 1738 #ifdef CONFIG_PM 1739 if (local->suspended) 1740 local->resuming = true; 1741 1742 if (local->wowlan) { 1743 res = drv_resume(local); 1744 local->wowlan = false; 1745 if (res < 0) { 1746 local->resuming = false; 1747 return res; 1748 } 1749 if (res == 0) 1750 goto wake_up; 1751 WARN_ON(res > 1); 1752 /* 1753 * res is 1, which means the driver requested 1754 * to go through a regular reset on wakeup. 1755 */ 1756 reconfig_due_to_wowlan = true; 1757 } 1758 #endif 1759 /* everything else happens only if HW was up & running */ 1760 if (!local->open_count) 1761 goto wake_up; 1762 1763 /* 1764 * Upon resume hardware can sometimes be goofy due to 1765 * various platform / driver / bus issues, so restarting 1766 * the device may at times not work immediately. Propagate 1767 * the error. 1768 */ 1769 res = drv_start(local); 1770 if (res) { 1771 if (local->suspended) 1772 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1773 else 1774 WARN(1, "Hardware became unavailable during restart.\n"); 1775 ieee80211_handle_reconfig_failure(local); 1776 return res; 1777 } 1778 1779 /* setup fragmentation threshold */ 1780 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1781 1782 /* setup RTS threshold */ 1783 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1784 1785 /* reset coverage class */ 1786 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1787 1788 ieee80211_led_radio(local, true); 1789 ieee80211_mod_tpt_led_trig(local, 1790 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1791 1792 /* add interfaces */ 1793 sdata = rtnl_dereference(local->monitor_sdata); 1794 if (sdata) { 1795 /* in HW restart it exists already */ 1796 WARN_ON(local->resuming); 1797 res = drv_add_interface(local, sdata); 1798 if (WARN_ON(res)) { 1799 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1800 synchronize_net(); 1801 kfree(sdata); 1802 } 1803 } 1804 1805 list_for_each_entry(sdata, &local->interfaces, list) { 1806 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1807 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1808 ieee80211_sdata_running(sdata)) 1809 res = drv_add_interface(local, sdata); 1810 } 1811 1812 /* add channel contexts */ 1813 if (local->use_chanctx) { 1814 mutex_lock(&local->chanctx_mtx); 1815 list_for_each_entry(ctx, &local->chanctx_list, list) 1816 if (ctx->replace_state != 1817 IEEE80211_CHANCTX_REPLACES_OTHER) 1818 WARN_ON(drv_add_chanctx(local, ctx)); 1819 mutex_unlock(&local->chanctx_mtx); 1820 1821 list_for_each_entry(sdata, &local->interfaces, list) { 1822 if (!ieee80211_sdata_running(sdata)) 1823 continue; 1824 ieee80211_assign_chanctx(local, sdata); 1825 } 1826 1827 sdata = rtnl_dereference(local->monitor_sdata); 1828 if (sdata && ieee80211_sdata_running(sdata)) 1829 ieee80211_assign_chanctx(local, sdata); 1830 } 1831 1832 /* add STAs back */ 1833 mutex_lock(&local->sta_mtx); 1834 list_for_each_entry(sta, &local->sta_list, list) { 1835 enum ieee80211_sta_state state; 1836 1837 if (!sta->uploaded) 1838 continue; 1839 1840 /* AP-mode stations will be added later */ 1841 if (sta->sdata->vif.type == NL80211_IFTYPE_AP) 1842 continue; 1843 1844 for (state = IEEE80211_STA_NOTEXIST; 1845 state < sta->sta_state; state++) 1846 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1847 state + 1)); 1848 } 1849 mutex_unlock(&local->sta_mtx); 1850 1851 /* reconfigure tx conf */ 1852 if (hw->queues >= IEEE80211_NUM_ACS) { 1853 list_for_each_entry(sdata, &local->interfaces, list) { 1854 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1855 sdata->vif.type == NL80211_IFTYPE_MONITOR || 1856 !ieee80211_sdata_running(sdata)) 1857 continue; 1858 1859 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1860 drv_conf_tx(local, sdata, i, 1861 &sdata->tx_conf[i]); 1862 } 1863 } 1864 1865 /* reconfigure hardware */ 1866 ieee80211_hw_config(local, ~0); 1867 1868 ieee80211_configure_filter(local); 1869 1870 /* Finally also reconfigure all the BSS information */ 1871 list_for_each_entry(sdata, &local->interfaces, list) { 1872 u32 changed; 1873 1874 if (!ieee80211_sdata_running(sdata)) 1875 continue; 1876 1877 /* common change flags for all interface types */ 1878 changed = BSS_CHANGED_ERP_CTS_PROT | 1879 BSS_CHANGED_ERP_PREAMBLE | 1880 BSS_CHANGED_ERP_SLOT | 1881 BSS_CHANGED_HT | 1882 BSS_CHANGED_BASIC_RATES | 1883 BSS_CHANGED_BEACON_INT | 1884 BSS_CHANGED_BSSID | 1885 BSS_CHANGED_CQM | 1886 BSS_CHANGED_QOS | 1887 BSS_CHANGED_IDLE | 1888 BSS_CHANGED_TXPOWER; 1889 1890 switch (sdata->vif.type) { 1891 case NL80211_IFTYPE_STATION: 1892 changed |= BSS_CHANGED_ASSOC | 1893 BSS_CHANGED_ARP_FILTER | 1894 BSS_CHANGED_PS; 1895 1896 /* Re-send beacon info report to the driver */ 1897 if (sdata->u.mgd.have_beacon) 1898 changed |= BSS_CHANGED_BEACON_INFO; 1899 1900 sdata_lock(sdata); 1901 ieee80211_bss_info_change_notify(sdata, changed); 1902 sdata_unlock(sdata); 1903 break; 1904 case NL80211_IFTYPE_OCB: 1905 changed |= BSS_CHANGED_OCB; 1906 ieee80211_bss_info_change_notify(sdata, changed); 1907 break; 1908 case NL80211_IFTYPE_ADHOC: 1909 changed |= BSS_CHANGED_IBSS; 1910 /* fall through */ 1911 case NL80211_IFTYPE_AP: 1912 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 1913 1914 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1915 changed |= BSS_CHANGED_AP_PROBE_RESP; 1916 1917 if (rcu_access_pointer(sdata->u.ap.beacon)) 1918 drv_start_ap(local, sdata); 1919 } 1920 1921 /* fall through */ 1922 case NL80211_IFTYPE_MESH_POINT: 1923 if (sdata->vif.bss_conf.enable_beacon) { 1924 changed |= BSS_CHANGED_BEACON | 1925 BSS_CHANGED_BEACON_ENABLED; 1926 ieee80211_bss_info_change_notify(sdata, changed); 1927 } 1928 break; 1929 case NL80211_IFTYPE_WDS: 1930 case NL80211_IFTYPE_AP_VLAN: 1931 case NL80211_IFTYPE_MONITOR: 1932 case NL80211_IFTYPE_P2P_DEVICE: 1933 /* nothing to do */ 1934 break; 1935 case NL80211_IFTYPE_UNSPECIFIED: 1936 case NUM_NL80211_IFTYPES: 1937 case NL80211_IFTYPE_P2P_CLIENT: 1938 case NL80211_IFTYPE_P2P_GO: 1939 WARN_ON(1); 1940 break; 1941 } 1942 } 1943 1944 ieee80211_recalc_ps(local, -1); 1945 1946 /* 1947 * The sta might be in psm against the ap (e.g. because 1948 * this was the state before a hw restart), so we 1949 * explicitly send a null packet in order to make sure 1950 * it'll sync against the ap (and get out of psm). 1951 */ 1952 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 1953 list_for_each_entry(sdata, &local->interfaces, list) { 1954 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1955 continue; 1956 if (!sdata->u.mgd.associated) 1957 continue; 1958 1959 ieee80211_send_nullfunc(local, sdata, 0); 1960 } 1961 } 1962 1963 /* APs are now beaconing, add back stations */ 1964 mutex_lock(&local->sta_mtx); 1965 list_for_each_entry(sta, &local->sta_list, list) { 1966 enum ieee80211_sta_state state; 1967 1968 if (!sta->uploaded) 1969 continue; 1970 1971 if (sta->sdata->vif.type != NL80211_IFTYPE_AP) 1972 continue; 1973 1974 for (state = IEEE80211_STA_NOTEXIST; 1975 state < sta->sta_state; state++) 1976 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1977 state + 1)); 1978 } 1979 mutex_unlock(&local->sta_mtx); 1980 1981 /* add back keys */ 1982 list_for_each_entry(sdata, &local->interfaces, list) 1983 if (ieee80211_sdata_running(sdata)) 1984 ieee80211_enable_keys(sdata); 1985 1986 wake_up: 1987 local->in_reconfig = false; 1988 barrier(); 1989 1990 if (local->monitors == local->open_count && local->monitors > 0) 1991 ieee80211_add_virtual_monitor(local); 1992 1993 /* 1994 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 1995 * sessions can be established after a resume. 1996 * 1997 * Also tear down aggregation sessions since reconfiguring 1998 * them in a hardware restart scenario is not easily done 1999 * right now, and the hardware will have lost information 2000 * about the sessions, but we and the AP still think they 2001 * are active. This is really a workaround though. 2002 */ 2003 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 2004 mutex_lock(&local->sta_mtx); 2005 2006 list_for_each_entry(sta, &local->sta_list, list) { 2007 ieee80211_sta_tear_down_BA_sessions( 2008 sta, AGG_STOP_LOCAL_REQUEST); 2009 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2010 } 2011 2012 mutex_unlock(&local->sta_mtx); 2013 } 2014 2015 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2016 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2017 false); 2018 2019 /* 2020 * Reconfigure sched scan if it was interrupted by FW restart or 2021 * suspend. 2022 */ 2023 mutex_lock(&local->mtx); 2024 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2025 lockdep_is_held(&local->mtx)); 2026 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2027 lockdep_is_held(&local->mtx)); 2028 if (sched_scan_sdata && sched_scan_req) 2029 /* 2030 * Sched scan stopped, but we don't want to report it. Instead, 2031 * we're trying to reschedule. 2032 */ 2033 if (__ieee80211_request_sched_scan_start(sched_scan_sdata, 2034 sched_scan_req)) 2035 sched_scan_stopped = true; 2036 mutex_unlock(&local->mtx); 2037 2038 if (sched_scan_stopped) 2039 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy); 2040 2041 /* 2042 * If this is for hw restart things are still running. 2043 * We may want to change that later, however. 2044 */ 2045 if (!local->suspended || reconfig_due_to_wowlan) 2046 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2047 2048 if (!local->suspended) 2049 return 0; 2050 2051 #ifdef CONFIG_PM 2052 /* first set suspended false, then resuming */ 2053 local->suspended = false; 2054 mb(); 2055 local->resuming = false; 2056 2057 if (!reconfig_due_to_wowlan) 2058 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2059 2060 list_for_each_entry(sdata, &local->interfaces, list) { 2061 if (!ieee80211_sdata_running(sdata)) 2062 continue; 2063 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2064 ieee80211_sta_restart(sdata); 2065 } 2066 2067 mod_timer(&local->sta_cleanup, jiffies + 1); 2068 #else 2069 WARN_ON(1); 2070 #endif 2071 2072 return 0; 2073 } 2074 2075 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2076 { 2077 struct ieee80211_sub_if_data *sdata; 2078 struct ieee80211_local *local; 2079 struct ieee80211_key *key; 2080 2081 if (WARN_ON(!vif)) 2082 return; 2083 2084 sdata = vif_to_sdata(vif); 2085 local = sdata->local; 2086 2087 if (WARN_ON(!local->resuming)) 2088 return; 2089 2090 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2091 return; 2092 2093 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2094 2095 mutex_lock(&local->key_mtx); 2096 list_for_each_entry(key, &sdata->key_list, list) 2097 key->flags |= KEY_FLAG_TAINTED; 2098 mutex_unlock(&local->key_mtx); 2099 } 2100 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2101 2102 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2103 { 2104 struct ieee80211_local *local = sdata->local; 2105 struct ieee80211_chanctx_conf *chanctx_conf; 2106 struct ieee80211_chanctx *chanctx; 2107 2108 mutex_lock(&local->chanctx_mtx); 2109 2110 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2111 lockdep_is_held(&local->chanctx_mtx)); 2112 2113 if (WARN_ON_ONCE(!chanctx_conf)) 2114 goto unlock; 2115 2116 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2117 ieee80211_recalc_smps_chanctx(local, chanctx); 2118 unlock: 2119 mutex_unlock(&local->chanctx_mtx); 2120 } 2121 2122 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2123 { 2124 struct ieee80211_local *local = sdata->local; 2125 struct ieee80211_chanctx_conf *chanctx_conf; 2126 struct ieee80211_chanctx *chanctx; 2127 2128 mutex_lock(&local->chanctx_mtx); 2129 2130 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2131 lockdep_is_held(&local->chanctx_mtx)); 2132 2133 if (WARN_ON_ONCE(!chanctx_conf)) 2134 goto unlock; 2135 2136 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2137 ieee80211_recalc_chanctx_min_def(local, chanctx); 2138 unlock: 2139 mutex_unlock(&local->chanctx_mtx); 2140 } 2141 2142 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) 2143 { 2144 int i; 2145 2146 for (i = 0; i < n_ids; i++) 2147 if (ids[i] == id) 2148 return true; 2149 return false; 2150 } 2151 2152 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, 2153 const u8 *ids, int n_ids, 2154 const u8 *after_ric, int n_after_ric, 2155 size_t offset) 2156 { 2157 size_t pos = offset; 2158 2159 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) { 2160 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { 2161 pos += 2 + ies[pos + 1]; 2162 2163 while (pos < ielen && 2164 !ieee80211_id_in_list(after_ric, n_after_ric, 2165 ies[pos])) 2166 pos += 2 + ies[pos + 1]; 2167 } else { 2168 pos += 2 + ies[pos + 1]; 2169 } 2170 } 2171 2172 return pos; 2173 } 2174 2175 size_t ieee80211_ie_split(const u8 *ies, size_t ielen, 2176 const u8 *ids, int n_ids, size_t offset) 2177 { 2178 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset); 2179 } 2180 EXPORT_SYMBOL(ieee80211_ie_split); 2181 2182 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2183 { 2184 size_t pos = offset; 2185 2186 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2187 pos += 2 + ies[pos + 1]; 2188 2189 return pos; 2190 } 2191 2192 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2193 int rssi_min_thold, 2194 int rssi_max_thold) 2195 { 2196 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2197 2198 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2199 return; 2200 2201 /* 2202 * Scale up threshold values before storing it, as the RSSI averaging 2203 * algorithm uses a scaled up value as well. Change this scaling 2204 * factor if the RSSI averaging algorithm changes. 2205 */ 2206 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2207 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2208 } 2209 2210 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2211 int rssi_min_thold, 2212 int rssi_max_thold) 2213 { 2214 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2215 2216 WARN_ON(rssi_min_thold == rssi_max_thold || 2217 rssi_min_thold > rssi_max_thold); 2218 2219 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2220 rssi_max_thold); 2221 } 2222 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2223 2224 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2225 { 2226 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2227 2228 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2229 } 2230 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2231 2232 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2233 u16 cap) 2234 { 2235 __le16 tmp; 2236 2237 *pos++ = WLAN_EID_HT_CAPABILITY; 2238 *pos++ = sizeof(struct ieee80211_ht_cap); 2239 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2240 2241 /* capability flags */ 2242 tmp = cpu_to_le16(cap); 2243 memcpy(pos, &tmp, sizeof(u16)); 2244 pos += sizeof(u16); 2245 2246 /* AMPDU parameters */ 2247 *pos++ = ht_cap->ampdu_factor | 2248 (ht_cap->ampdu_density << 2249 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2250 2251 /* MCS set */ 2252 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2253 pos += sizeof(ht_cap->mcs); 2254 2255 /* extended capabilities */ 2256 pos += sizeof(__le16); 2257 2258 /* BF capabilities */ 2259 pos += sizeof(__le32); 2260 2261 /* antenna selection */ 2262 pos += sizeof(u8); 2263 2264 return pos; 2265 } 2266 2267 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2268 u32 cap) 2269 { 2270 __le32 tmp; 2271 2272 *pos++ = WLAN_EID_VHT_CAPABILITY; 2273 *pos++ = sizeof(struct ieee80211_vht_cap); 2274 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2275 2276 /* capability flags */ 2277 tmp = cpu_to_le32(cap); 2278 memcpy(pos, &tmp, sizeof(u32)); 2279 pos += sizeof(u32); 2280 2281 /* VHT MCS set */ 2282 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2283 pos += sizeof(vht_cap->vht_mcs); 2284 2285 return pos; 2286 } 2287 2288 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2289 const struct cfg80211_chan_def *chandef, 2290 u16 prot_mode) 2291 { 2292 struct ieee80211_ht_operation *ht_oper; 2293 /* Build HT Information */ 2294 *pos++ = WLAN_EID_HT_OPERATION; 2295 *pos++ = sizeof(struct ieee80211_ht_operation); 2296 ht_oper = (struct ieee80211_ht_operation *)pos; 2297 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2298 chandef->chan->center_freq); 2299 switch (chandef->width) { 2300 case NL80211_CHAN_WIDTH_160: 2301 case NL80211_CHAN_WIDTH_80P80: 2302 case NL80211_CHAN_WIDTH_80: 2303 case NL80211_CHAN_WIDTH_40: 2304 if (chandef->center_freq1 > chandef->chan->center_freq) 2305 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2306 else 2307 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2308 break; 2309 default: 2310 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2311 break; 2312 } 2313 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2314 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2315 chandef->width != NL80211_CHAN_WIDTH_20) 2316 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2317 2318 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2319 ht_oper->stbc_param = 0x0000; 2320 2321 /* It seems that Basic MCS set and Supported MCS set 2322 are identical for the first 10 bytes */ 2323 memset(&ht_oper->basic_set, 0, 16); 2324 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2325 2326 return pos + sizeof(struct ieee80211_ht_operation); 2327 } 2328 2329 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, 2330 const struct ieee80211_ht_operation *ht_oper, 2331 struct cfg80211_chan_def *chandef) 2332 { 2333 enum nl80211_channel_type channel_type; 2334 2335 if (!ht_oper) { 2336 cfg80211_chandef_create(chandef, control_chan, 2337 NL80211_CHAN_NO_HT); 2338 return; 2339 } 2340 2341 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2342 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2343 channel_type = NL80211_CHAN_HT20; 2344 break; 2345 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2346 channel_type = NL80211_CHAN_HT40PLUS; 2347 break; 2348 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2349 channel_type = NL80211_CHAN_HT40MINUS; 2350 break; 2351 default: 2352 channel_type = NL80211_CHAN_NO_HT; 2353 } 2354 2355 cfg80211_chandef_create(chandef, control_chan, channel_type); 2356 } 2357 2358 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2359 const struct ieee80211_supported_band *sband, 2360 const u8 *srates, int srates_len, u32 *rates) 2361 { 2362 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2363 int shift = ieee80211_chandef_get_shift(chandef); 2364 struct ieee80211_rate *br; 2365 int brate, rate, i, j, count = 0; 2366 2367 *rates = 0; 2368 2369 for (i = 0; i < srates_len; i++) { 2370 rate = srates[i] & 0x7f; 2371 2372 for (j = 0; j < sband->n_bitrates; j++) { 2373 br = &sband->bitrates[j]; 2374 if ((rate_flags & br->flags) != rate_flags) 2375 continue; 2376 2377 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2378 if (brate == rate) { 2379 *rates |= BIT(j); 2380 count++; 2381 break; 2382 } 2383 } 2384 } 2385 return count; 2386 } 2387 2388 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2389 struct sk_buff *skb, bool need_basic, 2390 enum ieee80211_band band) 2391 { 2392 struct ieee80211_local *local = sdata->local; 2393 struct ieee80211_supported_band *sband; 2394 int rate, shift; 2395 u8 i, rates, *pos; 2396 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2397 u32 rate_flags; 2398 2399 shift = ieee80211_vif_get_shift(&sdata->vif); 2400 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2401 sband = local->hw.wiphy->bands[band]; 2402 rates = 0; 2403 for (i = 0; i < sband->n_bitrates; i++) { 2404 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2405 continue; 2406 rates++; 2407 } 2408 if (rates > 8) 2409 rates = 8; 2410 2411 if (skb_tailroom(skb) < rates + 2) 2412 return -ENOMEM; 2413 2414 pos = skb_put(skb, rates + 2); 2415 *pos++ = WLAN_EID_SUPP_RATES; 2416 *pos++ = rates; 2417 for (i = 0; i < rates; i++) { 2418 u8 basic = 0; 2419 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2420 continue; 2421 2422 if (need_basic && basic_rates & BIT(i)) 2423 basic = 0x80; 2424 rate = sband->bitrates[i].bitrate; 2425 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2426 5 * (1 << shift)); 2427 *pos++ = basic | (u8) rate; 2428 } 2429 2430 return 0; 2431 } 2432 2433 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2434 struct sk_buff *skb, bool need_basic, 2435 enum ieee80211_band band) 2436 { 2437 struct ieee80211_local *local = sdata->local; 2438 struct ieee80211_supported_band *sband; 2439 int rate, shift; 2440 u8 i, exrates, *pos; 2441 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2442 u32 rate_flags; 2443 2444 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2445 shift = ieee80211_vif_get_shift(&sdata->vif); 2446 2447 sband = local->hw.wiphy->bands[band]; 2448 exrates = 0; 2449 for (i = 0; i < sband->n_bitrates; i++) { 2450 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2451 continue; 2452 exrates++; 2453 } 2454 2455 if (exrates > 8) 2456 exrates -= 8; 2457 else 2458 exrates = 0; 2459 2460 if (skb_tailroom(skb) < exrates + 2) 2461 return -ENOMEM; 2462 2463 if (exrates) { 2464 pos = skb_put(skb, exrates + 2); 2465 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2466 *pos++ = exrates; 2467 for (i = 8; i < sband->n_bitrates; i++) { 2468 u8 basic = 0; 2469 if ((rate_flags & sband->bitrates[i].flags) 2470 != rate_flags) 2471 continue; 2472 if (need_basic && basic_rates & BIT(i)) 2473 basic = 0x80; 2474 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2475 5 * (1 << shift)); 2476 *pos++ = basic | (u8) rate; 2477 } 2478 } 2479 return 0; 2480 } 2481 2482 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2483 { 2484 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2485 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2486 2487 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2488 /* non-managed type inferfaces */ 2489 return 0; 2490 } 2491 return ifmgd->ave_beacon_signal / 16; 2492 } 2493 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2494 2495 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2496 { 2497 if (!mcs) 2498 return 1; 2499 2500 /* TODO: consider rx_highest */ 2501 2502 if (mcs->rx_mask[3]) 2503 return 4; 2504 if (mcs->rx_mask[2]) 2505 return 3; 2506 if (mcs->rx_mask[1]) 2507 return 2; 2508 return 1; 2509 } 2510 2511 /** 2512 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2513 * @local: mac80211 hw info struct 2514 * @status: RX status 2515 * @mpdu_len: total MPDU length (including FCS) 2516 * @mpdu_offset: offset into MPDU to calculate timestamp at 2517 * 2518 * This function calculates the RX timestamp at the given MPDU offset, taking 2519 * into account what the RX timestamp was. An offset of 0 will just normalize 2520 * the timestamp to TSF at beginning of MPDU reception. 2521 */ 2522 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2523 struct ieee80211_rx_status *status, 2524 unsigned int mpdu_len, 2525 unsigned int mpdu_offset) 2526 { 2527 u64 ts = status->mactime; 2528 struct rate_info ri; 2529 u16 rate; 2530 2531 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2532 return 0; 2533 2534 memset(&ri, 0, sizeof(ri)); 2535 2536 /* Fill cfg80211 rate info */ 2537 if (status->flag & RX_FLAG_HT) { 2538 ri.mcs = status->rate_idx; 2539 ri.flags |= RATE_INFO_FLAGS_MCS; 2540 if (status->flag & RX_FLAG_40MHZ) 2541 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH; 2542 if (status->flag & RX_FLAG_SHORT_GI) 2543 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2544 } else if (status->flag & RX_FLAG_VHT) { 2545 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2546 ri.mcs = status->rate_idx; 2547 ri.nss = status->vht_nss; 2548 if (status->flag & RX_FLAG_40MHZ) 2549 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH; 2550 if (status->vht_flag & RX_VHT_FLAG_80MHZ) 2551 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH; 2552 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) 2553 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH; 2554 if (status->vht_flag & RX_VHT_FLAG_160MHZ) 2555 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH; 2556 if (status->flag & RX_FLAG_SHORT_GI) 2557 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2558 } else { 2559 struct ieee80211_supported_band *sband; 2560 int shift = 0; 2561 int bitrate; 2562 2563 if (status->flag & RX_FLAG_10MHZ) 2564 shift = 1; 2565 if (status->flag & RX_FLAG_5MHZ) 2566 shift = 2; 2567 2568 sband = local->hw.wiphy->bands[status->band]; 2569 bitrate = sband->bitrates[status->rate_idx].bitrate; 2570 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2571 } 2572 2573 rate = cfg80211_calculate_bitrate(&ri); 2574 if (WARN_ONCE(!rate, 2575 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n", 2576 status->flag, status->rate_idx, status->vht_nss)) 2577 return 0; 2578 2579 /* rewind from end of MPDU */ 2580 if (status->flag & RX_FLAG_MACTIME_END) 2581 ts -= mpdu_len * 8 * 10 / rate; 2582 2583 ts += mpdu_offset * 8 * 10 / rate; 2584 2585 return ts; 2586 } 2587 2588 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2589 { 2590 struct ieee80211_sub_if_data *sdata; 2591 struct cfg80211_chan_def chandef; 2592 2593 mutex_lock(&local->mtx); 2594 mutex_lock(&local->iflist_mtx); 2595 list_for_each_entry(sdata, &local->interfaces, list) { 2596 /* it might be waiting for the local->mtx, but then 2597 * by the time it gets it, sdata->wdev.cac_started 2598 * will no longer be true 2599 */ 2600 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2601 2602 if (sdata->wdev.cac_started) { 2603 chandef = sdata->vif.bss_conf.chandef; 2604 ieee80211_vif_release_channel(sdata); 2605 cfg80211_cac_event(sdata->dev, 2606 &chandef, 2607 NL80211_RADAR_CAC_ABORTED, 2608 GFP_KERNEL); 2609 } 2610 } 2611 mutex_unlock(&local->iflist_mtx); 2612 mutex_unlock(&local->mtx); 2613 } 2614 2615 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2616 { 2617 struct ieee80211_local *local = 2618 container_of(work, struct ieee80211_local, radar_detected_work); 2619 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2620 struct ieee80211_chanctx *ctx; 2621 int num_chanctx = 0; 2622 2623 mutex_lock(&local->chanctx_mtx); 2624 list_for_each_entry(ctx, &local->chanctx_list, list) { 2625 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 2626 continue; 2627 2628 num_chanctx++; 2629 chandef = ctx->conf.def; 2630 } 2631 mutex_unlock(&local->chanctx_mtx); 2632 2633 ieee80211_dfs_cac_cancel(local); 2634 2635 if (num_chanctx > 1) 2636 /* XXX: multi-channel is not supported yet */ 2637 WARN_ON(1); 2638 else 2639 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 2640 } 2641 2642 void ieee80211_radar_detected(struct ieee80211_hw *hw) 2643 { 2644 struct ieee80211_local *local = hw_to_local(hw); 2645 2646 trace_api_radar_detected(local); 2647 2648 ieee80211_queue_work(hw, &local->radar_detected_work); 2649 } 2650 EXPORT_SYMBOL(ieee80211_radar_detected); 2651 2652 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 2653 { 2654 u32 ret; 2655 int tmp; 2656 2657 switch (c->width) { 2658 case NL80211_CHAN_WIDTH_20: 2659 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2660 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2661 break; 2662 case NL80211_CHAN_WIDTH_40: 2663 c->width = NL80211_CHAN_WIDTH_20; 2664 c->center_freq1 = c->chan->center_freq; 2665 ret = IEEE80211_STA_DISABLE_40MHZ | 2666 IEEE80211_STA_DISABLE_VHT; 2667 break; 2668 case NL80211_CHAN_WIDTH_80: 2669 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 2670 /* n_P40 */ 2671 tmp /= 2; 2672 /* freq_P40 */ 2673 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 2674 c->width = NL80211_CHAN_WIDTH_40; 2675 ret = IEEE80211_STA_DISABLE_VHT; 2676 break; 2677 case NL80211_CHAN_WIDTH_80P80: 2678 c->center_freq2 = 0; 2679 c->width = NL80211_CHAN_WIDTH_80; 2680 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2681 IEEE80211_STA_DISABLE_160MHZ; 2682 break; 2683 case NL80211_CHAN_WIDTH_160: 2684 /* n_P20 */ 2685 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 2686 /* n_P80 */ 2687 tmp /= 4; 2688 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 2689 c->width = NL80211_CHAN_WIDTH_80; 2690 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2691 IEEE80211_STA_DISABLE_160MHZ; 2692 break; 2693 default: 2694 case NL80211_CHAN_WIDTH_20_NOHT: 2695 WARN_ON_ONCE(1); 2696 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2697 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2698 break; 2699 case NL80211_CHAN_WIDTH_5: 2700 case NL80211_CHAN_WIDTH_10: 2701 WARN_ON_ONCE(1); 2702 /* keep c->width */ 2703 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2704 break; 2705 } 2706 2707 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 2708 2709 return ret; 2710 } 2711 2712 /* 2713 * Returns true if smps_mode_new is strictly more restrictive than 2714 * smps_mode_old. 2715 */ 2716 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 2717 enum ieee80211_smps_mode smps_mode_new) 2718 { 2719 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 2720 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 2721 return false; 2722 2723 switch (smps_mode_old) { 2724 case IEEE80211_SMPS_STATIC: 2725 return false; 2726 case IEEE80211_SMPS_DYNAMIC: 2727 return smps_mode_new == IEEE80211_SMPS_STATIC; 2728 case IEEE80211_SMPS_OFF: 2729 return smps_mode_new != IEEE80211_SMPS_OFF; 2730 default: 2731 WARN_ON(1); 2732 } 2733 2734 return false; 2735 } 2736 2737 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 2738 struct cfg80211_csa_settings *csa_settings) 2739 { 2740 struct sk_buff *skb; 2741 struct ieee80211_mgmt *mgmt; 2742 struct ieee80211_local *local = sdata->local; 2743 int freq; 2744 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) + 2745 sizeof(mgmt->u.action.u.chan_switch); 2746 u8 *pos; 2747 2748 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 2749 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 2750 return -EOPNOTSUPP; 2751 2752 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 2753 5 + /* channel switch announcement element */ 2754 3 + /* secondary channel offset element */ 2755 8); /* mesh channel switch parameters element */ 2756 if (!skb) 2757 return -ENOMEM; 2758 2759 skb_reserve(skb, local->tx_headroom); 2760 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len); 2761 memset(mgmt, 0, hdr_len); 2762 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2763 IEEE80211_STYPE_ACTION); 2764 2765 eth_broadcast_addr(mgmt->da); 2766 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2767 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2768 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 2769 } else { 2770 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 2771 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 2772 } 2773 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 2774 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 2775 pos = skb_put(skb, 5); 2776 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 2777 *pos++ = 3; /* IE length */ 2778 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 2779 freq = csa_settings->chandef.chan->center_freq; 2780 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 2781 *pos++ = csa_settings->count; /* count */ 2782 2783 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 2784 enum nl80211_channel_type ch_type; 2785 2786 skb_put(skb, 3); 2787 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 2788 *pos++ = 1; /* IE length */ 2789 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 2790 if (ch_type == NL80211_CHAN_HT40PLUS) 2791 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2792 else 2793 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2794 } 2795 2796 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2797 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 2798 2799 skb_put(skb, 8); 2800 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 2801 *pos++ = 6; /* IE length */ 2802 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 2803 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 2804 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 2805 *pos++ |= csa_settings->block_tx ? 2806 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 2807 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 2808 pos += 2; 2809 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 2810 pos += 2; 2811 } 2812 2813 ieee80211_tx_skb(sdata, skb); 2814 return 0; 2815 } 2816 2817 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 2818 { 2819 return !(cs == NULL || cs->cipher == 0 || 2820 cs->hdr_len < cs->pn_len + cs->pn_off || 2821 cs->hdr_len <= cs->key_idx_off || 2822 cs->key_idx_shift > 7 || 2823 cs->key_idx_mask == 0); 2824 } 2825 2826 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 2827 { 2828 int i; 2829 2830 /* Ensure we have enough iftype bitmap space for all iftype values */ 2831 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 2832 2833 for (i = 0; i < n; i++) 2834 if (!ieee80211_cs_valid(&cs[i])) 2835 return false; 2836 2837 return true; 2838 } 2839 2840 const struct ieee80211_cipher_scheme * 2841 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 2842 enum nl80211_iftype iftype) 2843 { 2844 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 2845 int n = local->hw.n_cipher_schemes; 2846 int i; 2847 const struct ieee80211_cipher_scheme *cs = NULL; 2848 2849 for (i = 0; i < n; i++) { 2850 if (l[i].cipher == cipher) { 2851 cs = &l[i]; 2852 break; 2853 } 2854 } 2855 2856 if (!cs || !(cs->iftype & BIT(iftype))) 2857 return NULL; 2858 2859 return cs; 2860 } 2861 2862 int ieee80211_cs_headroom(struct ieee80211_local *local, 2863 struct cfg80211_crypto_settings *crypto, 2864 enum nl80211_iftype iftype) 2865 { 2866 const struct ieee80211_cipher_scheme *cs; 2867 int headroom = IEEE80211_ENCRYPT_HEADROOM; 2868 int i; 2869 2870 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 2871 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 2872 iftype); 2873 2874 if (cs && headroom < cs->hdr_len) 2875 headroom = cs->hdr_len; 2876 } 2877 2878 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 2879 if (cs && headroom < cs->hdr_len) 2880 headroom = cs->hdr_len; 2881 2882 return headroom; 2883 } 2884 2885 static bool 2886 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 2887 { 2888 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 2889 int skip; 2890 2891 if (end > 0) 2892 return false; 2893 2894 /* End time is in the past, check for repetitions */ 2895 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 2896 if (data->count[i] < 255) { 2897 if (data->count[i] <= skip) { 2898 data->count[i] = 0; 2899 return false; 2900 } 2901 2902 data->count[i] -= skip; 2903 } 2904 2905 data->desc[i].start += skip * data->desc[i].interval; 2906 2907 return true; 2908 } 2909 2910 static bool 2911 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 2912 s32 *offset) 2913 { 2914 bool ret = false; 2915 int i; 2916 2917 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 2918 s32 cur; 2919 2920 if (!data->count[i]) 2921 continue; 2922 2923 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 2924 ret = true; 2925 2926 cur = data->desc[i].start - tsf; 2927 if (cur > *offset) 2928 continue; 2929 2930 cur = data->desc[i].start + data->desc[i].duration - tsf; 2931 if (cur > *offset) 2932 *offset = cur; 2933 } 2934 2935 return ret; 2936 } 2937 2938 static u32 2939 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 2940 { 2941 s32 offset = 0; 2942 int tries = 0; 2943 /* 2944 * arbitrary limit, used to avoid infinite loops when combined NoA 2945 * descriptors cover the full time period. 2946 */ 2947 int max_tries = 5; 2948 2949 ieee80211_extend_absent_time(data, tsf, &offset); 2950 do { 2951 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 2952 break; 2953 2954 tries++; 2955 } while (tries < max_tries); 2956 2957 return offset; 2958 } 2959 2960 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 2961 { 2962 u32 next_offset = BIT(31) - 1; 2963 int i; 2964 2965 data->absent = 0; 2966 data->has_next_tsf = false; 2967 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 2968 s32 start; 2969 2970 if (!data->count[i]) 2971 continue; 2972 2973 ieee80211_extend_noa_desc(data, tsf, i); 2974 start = data->desc[i].start - tsf; 2975 if (start <= 0) 2976 data->absent |= BIT(i); 2977 2978 if (next_offset > start) 2979 next_offset = start; 2980 2981 data->has_next_tsf = true; 2982 } 2983 2984 if (data->absent) 2985 next_offset = ieee80211_get_noa_absent_time(data, tsf); 2986 2987 data->next_tsf = tsf + next_offset; 2988 } 2989 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 2990 2991 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 2992 struct ieee80211_noa_data *data, u32 tsf) 2993 { 2994 int ret = 0; 2995 int i; 2996 2997 memset(data, 0, sizeof(*data)); 2998 2999 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3000 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3001 3002 if (!desc->count || !desc->duration) 3003 continue; 3004 3005 data->count[i] = desc->count; 3006 data->desc[i].start = le32_to_cpu(desc->start_time); 3007 data->desc[i].duration = le32_to_cpu(desc->duration); 3008 data->desc[i].interval = le32_to_cpu(desc->interval); 3009 3010 if (data->count[i] > 1 && 3011 data->desc[i].interval < data->desc[i].duration) 3012 continue; 3013 3014 ieee80211_extend_noa_desc(data, tsf, i); 3015 ret++; 3016 } 3017 3018 if (ret) 3019 ieee80211_update_p2p_noa(data, tsf); 3020 3021 return ret; 3022 } 3023 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3024 3025 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3026 struct ieee80211_sub_if_data *sdata) 3027 { 3028 u64 tsf = drv_get_tsf(local, sdata); 3029 u64 dtim_count = 0; 3030 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3031 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3032 struct ps_data *ps; 3033 u8 bcns_from_dtim; 3034 3035 if (tsf == -1ULL || !beacon_int || !dtim_period) 3036 return; 3037 3038 if (sdata->vif.type == NL80211_IFTYPE_AP || 3039 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3040 if (!sdata->bss) 3041 return; 3042 3043 ps = &sdata->bss->ps; 3044 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3045 ps = &sdata->u.mesh.ps; 3046 } else { 3047 return; 3048 } 3049 3050 /* 3051 * actually finds last dtim_count, mac80211 will update in 3052 * __beacon_add_tim(). 3053 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3054 */ 3055 do_div(tsf, beacon_int); 3056 bcns_from_dtim = do_div(tsf, dtim_period); 3057 /* just had a DTIM */ 3058 if (!bcns_from_dtim) 3059 dtim_count = 0; 3060 else 3061 dtim_count = dtim_period - bcns_from_dtim; 3062 3063 ps->dtim_count = dtim_count; 3064 } 3065 3066 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3067 struct ieee80211_chanctx *ctx) 3068 { 3069 struct ieee80211_sub_if_data *sdata; 3070 u8 radar_detect = 0; 3071 3072 lockdep_assert_held(&local->chanctx_mtx); 3073 3074 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3075 return 0; 3076 3077 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3078 if (sdata->reserved_radar_required) 3079 radar_detect |= BIT(sdata->reserved_chandef.width); 3080 3081 /* 3082 * An in-place reservation context should not have any assigned vifs 3083 * until it replaces the other context. 3084 */ 3085 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3086 !list_empty(&ctx->assigned_vifs)); 3087 3088 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3089 if (sdata->radar_required) 3090 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3091 3092 return radar_detect; 3093 } 3094 3095 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3096 const struct cfg80211_chan_def *chandef, 3097 enum ieee80211_chanctx_mode chanmode, 3098 u8 radar_detect) 3099 { 3100 struct ieee80211_local *local = sdata->local; 3101 struct ieee80211_sub_if_data *sdata_iter; 3102 enum nl80211_iftype iftype = sdata->wdev.iftype; 3103 int num[NUM_NL80211_IFTYPES]; 3104 struct ieee80211_chanctx *ctx; 3105 int num_different_channels = 0; 3106 int total = 1; 3107 3108 lockdep_assert_held(&local->chanctx_mtx); 3109 3110 if (WARN_ON(hweight32(radar_detect) > 1)) 3111 return -EINVAL; 3112 3113 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3114 !chandef->chan)) 3115 return -EINVAL; 3116 3117 if (chandef) 3118 num_different_channels = 1; 3119 3120 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3121 return -EINVAL; 3122 3123 /* Always allow software iftypes */ 3124 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3125 if (radar_detect) 3126 return -EINVAL; 3127 return 0; 3128 } 3129 3130 memset(num, 0, sizeof(num)); 3131 3132 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3133 num[iftype] = 1; 3134 3135 list_for_each_entry(ctx, &local->chanctx_list, list) { 3136 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3137 continue; 3138 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3139 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3140 num_different_channels++; 3141 continue; 3142 } 3143 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3144 cfg80211_chandef_compatible(chandef, 3145 &ctx->conf.def)) 3146 continue; 3147 num_different_channels++; 3148 } 3149 3150 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3151 struct wireless_dev *wdev_iter; 3152 3153 wdev_iter = &sdata_iter->wdev; 3154 3155 if (sdata_iter == sdata || 3156 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL || 3157 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3158 continue; 3159 3160 num[wdev_iter->iftype]++; 3161 total++; 3162 } 3163 3164 if (total == 1 && !radar_detect) 3165 return 0; 3166 3167 return cfg80211_check_combinations(local->hw.wiphy, 3168 num_different_channels, 3169 radar_detect, num); 3170 } 3171 3172 static void 3173 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3174 void *data) 3175 { 3176 u32 *max_num_different_channels = data; 3177 3178 *max_num_different_channels = max(*max_num_different_channels, 3179 c->num_different_channels); 3180 } 3181 3182 int ieee80211_max_num_channels(struct ieee80211_local *local) 3183 { 3184 struct ieee80211_sub_if_data *sdata; 3185 int num[NUM_NL80211_IFTYPES] = {}; 3186 struct ieee80211_chanctx *ctx; 3187 int num_different_channels = 0; 3188 u8 radar_detect = 0; 3189 u32 max_num_different_channels = 1; 3190 int err; 3191 3192 lockdep_assert_held(&local->chanctx_mtx); 3193 3194 list_for_each_entry(ctx, &local->chanctx_list, list) { 3195 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3196 continue; 3197 3198 num_different_channels++; 3199 3200 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3201 } 3202 3203 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3204 num[sdata->wdev.iftype]++; 3205 3206 err = cfg80211_iter_combinations(local->hw.wiphy, 3207 num_different_channels, radar_detect, 3208 num, ieee80211_iter_max_chans, 3209 &max_num_different_channels); 3210 if (err < 0) 3211 return err; 3212 3213 return max_num_different_channels; 3214 } 3215 3216 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3217 { 3218 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3219 *buf++ = 7; /* len */ 3220 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3221 *buf++ = 0x50; 3222 *buf++ = 0xf2; 3223 *buf++ = 2; /* WME */ 3224 *buf++ = 0; /* WME info */ 3225 *buf++ = 1; /* WME ver */ 3226 *buf++ = qosinfo; /* U-APSD no in use */ 3227 3228 return buf; 3229 } 3230