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 (local->ops->wake_tx_queue && 312 (atomic_read(&sdata->txqs_len[ac]) > 313 local->hw.txq_ac_max_pending)) 314 continue; 315 316 if (ac_queue == queue || 317 (sdata->vif.cab_queue == queue && 318 local->queue_stop_reasons[ac_queue] == 0 && 319 skb_queue_empty(&local->pending[ac_queue]))) 320 netif_wake_subqueue(sdata->dev, ac); 321 } 322 } 323 } 324 325 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 326 enum queue_stop_reason reason, 327 bool refcounted) 328 { 329 struct ieee80211_local *local = hw_to_local(hw); 330 331 trace_wake_queue(local, queue, reason); 332 333 if (WARN_ON(queue >= hw->queues)) 334 return; 335 336 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 337 return; 338 339 if (!refcounted) 340 local->q_stop_reasons[queue][reason] = 0; 341 else 342 local->q_stop_reasons[queue][reason]--; 343 344 if (local->q_stop_reasons[queue][reason] == 0) 345 __clear_bit(reason, &local->queue_stop_reasons[queue]); 346 347 if (local->queue_stop_reasons[queue] != 0) 348 /* someone still has this queue stopped */ 349 return; 350 351 if (skb_queue_empty(&local->pending[queue])) { 352 rcu_read_lock(); 353 ieee80211_propagate_queue_wake(local, queue); 354 rcu_read_unlock(); 355 } else 356 tasklet_schedule(&local->tx_pending_tasklet); 357 } 358 359 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 360 enum queue_stop_reason reason, 361 bool refcounted) 362 { 363 struct ieee80211_local *local = hw_to_local(hw); 364 unsigned long flags; 365 366 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 367 __ieee80211_wake_queue(hw, queue, reason, refcounted); 368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 369 } 370 371 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 372 { 373 ieee80211_wake_queue_by_reason(hw, queue, 374 IEEE80211_QUEUE_STOP_REASON_DRIVER, 375 false); 376 } 377 EXPORT_SYMBOL(ieee80211_wake_queue); 378 379 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 380 enum queue_stop_reason reason, 381 bool refcounted) 382 { 383 struct ieee80211_local *local = hw_to_local(hw); 384 struct ieee80211_sub_if_data *sdata; 385 int n_acs = IEEE80211_NUM_ACS; 386 387 trace_stop_queue(local, queue, reason); 388 389 if (WARN_ON(queue >= hw->queues)) 390 return; 391 392 if (!refcounted) 393 local->q_stop_reasons[queue][reason] = 1; 394 else 395 local->q_stop_reasons[queue][reason]++; 396 397 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 398 return; 399 400 if (local->hw.queues < IEEE80211_NUM_ACS) 401 n_acs = 1; 402 403 rcu_read_lock(); 404 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 405 int ac; 406 407 if (!sdata->dev) 408 continue; 409 410 for (ac = 0; ac < n_acs; ac++) { 411 if (sdata->vif.hw_queue[ac] == queue || 412 sdata->vif.cab_queue == queue) 413 netif_stop_subqueue(sdata->dev, ac); 414 } 415 } 416 rcu_read_unlock(); 417 } 418 419 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 420 enum queue_stop_reason reason, 421 bool refcounted) 422 { 423 struct ieee80211_local *local = hw_to_local(hw); 424 unsigned long flags; 425 426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 427 __ieee80211_stop_queue(hw, queue, reason, refcounted); 428 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 429 } 430 431 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 432 { 433 ieee80211_stop_queue_by_reason(hw, queue, 434 IEEE80211_QUEUE_STOP_REASON_DRIVER, 435 false); 436 } 437 EXPORT_SYMBOL(ieee80211_stop_queue); 438 439 void ieee80211_add_pending_skb(struct ieee80211_local *local, 440 struct sk_buff *skb) 441 { 442 struct ieee80211_hw *hw = &local->hw; 443 unsigned long flags; 444 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 445 int queue = info->hw_queue; 446 447 if (WARN_ON(!info->control.vif)) { 448 ieee80211_free_txskb(&local->hw, skb); 449 return; 450 } 451 452 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 453 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 454 false); 455 __skb_queue_tail(&local->pending[queue], skb); 456 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 457 false); 458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 459 } 460 461 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 462 struct sk_buff_head *skbs) 463 { 464 struct ieee80211_hw *hw = &local->hw; 465 struct sk_buff *skb; 466 unsigned long flags; 467 int queue, i; 468 469 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 470 while ((skb = skb_dequeue(skbs))) { 471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 472 473 if (WARN_ON(!info->control.vif)) { 474 ieee80211_free_txskb(&local->hw, skb); 475 continue; 476 } 477 478 queue = info->hw_queue; 479 480 __ieee80211_stop_queue(hw, queue, 481 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 482 false); 483 484 __skb_queue_tail(&local->pending[queue], skb); 485 } 486 487 for (i = 0; i < hw->queues; i++) 488 __ieee80211_wake_queue(hw, i, 489 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 490 false); 491 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 492 } 493 494 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 495 unsigned long queues, 496 enum queue_stop_reason reason, 497 bool refcounted) 498 { 499 struct ieee80211_local *local = hw_to_local(hw); 500 unsigned long flags; 501 int i; 502 503 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 504 505 for_each_set_bit(i, &queues, hw->queues) 506 __ieee80211_stop_queue(hw, i, reason, refcounted); 507 508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 509 } 510 511 void ieee80211_stop_queues(struct ieee80211_hw *hw) 512 { 513 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 514 IEEE80211_QUEUE_STOP_REASON_DRIVER, 515 false); 516 } 517 EXPORT_SYMBOL(ieee80211_stop_queues); 518 519 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 520 { 521 struct ieee80211_local *local = hw_to_local(hw); 522 unsigned long flags; 523 int ret; 524 525 if (WARN_ON(queue >= hw->queues)) 526 return true; 527 528 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 529 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 530 &local->queue_stop_reasons[queue]); 531 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 532 return ret; 533 } 534 EXPORT_SYMBOL(ieee80211_queue_stopped); 535 536 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 537 unsigned long queues, 538 enum queue_stop_reason reason, 539 bool refcounted) 540 { 541 struct ieee80211_local *local = hw_to_local(hw); 542 unsigned long flags; 543 int i; 544 545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 546 547 for_each_set_bit(i, &queues, hw->queues) 548 __ieee80211_wake_queue(hw, i, reason, refcounted); 549 550 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 551 } 552 553 void ieee80211_wake_queues(struct ieee80211_hw *hw) 554 { 555 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 556 IEEE80211_QUEUE_STOP_REASON_DRIVER, 557 false); 558 } 559 EXPORT_SYMBOL(ieee80211_wake_queues); 560 561 static unsigned int 562 ieee80211_get_vif_queues(struct ieee80211_local *local, 563 struct ieee80211_sub_if_data *sdata) 564 { 565 unsigned int queues; 566 567 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 568 int ac; 569 570 queues = 0; 571 572 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 573 queues |= BIT(sdata->vif.hw_queue[ac]); 574 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 575 queues |= BIT(sdata->vif.cab_queue); 576 } else { 577 /* all queues */ 578 queues = BIT(local->hw.queues) - 1; 579 } 580 581 return queues; 582 } 583 584 void __ieee80211_flush_queues(struct ieee80211_local *local, 585 struct ieee80211_sub_if_data *sdata, 586 unsigned int queues, bool drop) 587 { 588 if (!local->ops->flush) 589 return; 590 591 /* 592 * If no queue was set, or if the HW doesn't support 593 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 594 */ 595 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 596 queues = ieee80211_get_vif_queues(local, sdata); 597 598 ieee80211_stop_queues_by_reason(&local->hw, queues, 599 IEEE80211_QUEUE_STOP_REASON_FLUSH, 600 false); 601 602 drv_flush(local, sdata, queues, drop); 603 604 ieee80211_wake_queues_by_reason(&local->hw, queues, 605 IEEE80211_QUEUE_STOP_REASON_FLUSH, 606 false); 607 } 608 609 void ieee80211_flush_queues(struct ieee80211_local *local, 610 struct ieee80211_sub_if_data *sdata, bool drop) 611 { 612 __ieee80211_flush_queues(local, sdata, 0, drop); 613 } 614 615 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 616 struct ieee80211_sub_if_data *sdata, 617 enum queue_stop_reason reason) 618 { 619 ieee80211_stop_queues_by_reason(&local->hw, 620 ieee80211_get_vif_queues(local, sdata), 621 reason, true); 622 } 623 624 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 625 struct ieee80211_sub_if_data *sdata, 626 enum queue_stop_reason reason) 627 { 628 ieee80211_wake_queues_by_reason(&local->hw, 629 ieee80211_get_vif_queues(local, sdata), 630 reason, true); 631 } 632 633 static void __iterate_interfaces(struct ieee80211_local *local, 634 u32 iter_flags, 635 void (*iterator)(void *data, u8 *mac, 636 struct ieee80211_vif *vif), 637 void *data) 638 { 639 struct ieee80211_sub_if_data *sdata; 640 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 641 642 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 643 switch (sdata->vif.type) { 644 case NL80211_IFTYPE_MONITOR: 645 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) 646 continue; 647 break; 648 case NL80211_IFTYPE_AP_VLAN: 649 continue; 650 default: 651 break; 652 } 653 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 654 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 655 continue; 656 if (ieee80211_sdata_running(sdata) || !active_only) 657 iterator(data, sdata->vif.addr, 658 &sdata->vif); 659 } 660 661 sdata = rcu_dereference_check(local->monitor_sdata, 662 lockdep_is_held(&local->iflist_mtx) || 663 lockdep_rtnl_is_held()); 664 if (sdata && 665 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 666 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 667 iterator(data, sdata->vif.addr, &sdata->vif); 668 } 669 670 void ieee80211_iterate_interfaces( 671 struct ieee80211_hw *hw, u32 iter_flags, 672 void (*iterator)(void *data, u8 *mac, 673 struct ieee80211_vif *vif), 674 void *data) 675 { 676 struct ieee80211_local *local = hw_to_local(hw); 677 678 mutex_lock(&local->iflist_mtx); 679 __iterate_interfaces(local, iter_flags, iterator, data); 680 mutex_unlock(&local->iflist_mtx); 681 } 682 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 683 684 void ieee80211_iterate_active_interfaces_atomic( 685 struct ieee80211_hw *hw, u32 iter_flags, 686 void (*iterator)(void *data, u8 *mac, 687 struct ieee80211_vif *vif), 688 void *data) 689 { 690 struct ieee80211_local *local = hw_to_local(hw); 691 692 rcu_read_lock(); 693 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 694 iterator, data); 695 rcu_read_unlock(); 696 } 697 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 698 699 void ieee80211_iterate_active_interfaces_rtnl( 700 struct ieee80211_hw *hw, u32 iter_flags, 701 void (*iterator)(void *data, u8 *mac, 702 struct ieee80211_vif *vif), 703 void *data) 704 { 705 struct ieee80211_local *local = hw_to_local(hw); 706 707 ASSERT_RTNL(); 708 709 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 710 iterator, data); 711 } 712 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 713 714 static void __iterate_stations(struct ieee80211_local *local, 715 void (*iterator)(void *data, 716 struct ieee80211_sta *sta), 717 void *data) 718 { 719 struct sta_info *sta; 720 721 list_for_each_entry_rcu(sta, &local->sta_list, list) { 722 if (!sta->uploaded) 723 continue; 724 725 iterator(data, &sta->sta); 726 } 727 } 728 729 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 730 void (*iterator)(void *data, 731 struct ieee80211_sta *sta), 732 void *data) 733 { 734 struct ieee80211_local *local = hw_to_local(hw); 735 736 rcu_read_lock(); 737 __iterate_stations(local, iterator, data); 738 rcu_read_unlock(); 739 } 740 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 741 742 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 743 { 744 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 745 746 if (!ieee80211_sdata_running(sdata) || 747 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 748 return NULL; 749 return &sdata->vif; 750 } 751 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 752 753 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 754 { 755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 756 757 if (!ieee80211_sdata_running(sdata) || 758 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 759 return NULL; 760 761 return &sdata->wdev; 762 } 763 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 764 765 /* 766 * Nothing should have been stuffed into the workqueue during 767 * the suspend->resume cycle. Since we can't check each caller 768 * of this function if we are already quiescing / suspended, 769 * check here and don't WARN since this can actually happen when 770 * the rx path (for example) is racing against __ieee80211_suspend 771 * and suspending / quiescing was set after the rx path checked 772 * them. 773 */ 774 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 775 { 776 if (local->quiescing || (local->suspended && !local->resuming)) { 777 pr_warn("queueing ieee80211 work while going to suspend\n"); 778 return false; 779 } 780 781 return true; 782 } 783 784 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 785 { 786 struct ieee80211_local *local = hw_to_local(hw); 787 788 if (!ieee80211_can_queue_work(local)) 789 return; 790 791 queue_work(local->workqueue, work); 792 } 793 EXPORT_SYMBOL(ieee80211_queue_work); 794 795 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 796 struct delayed_work *dwork, 797 unsigned long delay) 798 { 799 struct ieee80211_local *local = hw_to_local(hw); 800 801 if (!ieee80211_can_queue_work(local)) 802 return; 803 804 queue_delayed_work(local->workqueue, dwork, delay); 805 } 806 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 807 808 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 809 struct ieee802_11_elems *elems, 810 u64 filter, u32 crc) 811 { 812 size_t left = len; 813 const u8 *pos = start; 814 bool calc_crc = filter != 0; 815 DECLARE_BITMAP(seen_elems, 256); 816 const u8 *ie; 817 818 bitmap_zero(seen_elems, 256); 819 memset(elems, 0, sizeof(*elems)); 820 elems->ie_start = start; 821 elems->total_len = len; 822 823 while (left >= 2) { 824 u8 id, elen; 825 bool elem_parse_failed; 826 827 id = *pos++; 828 elen = *pos++; 829 left -= 2; 830 831 if (elen > left) { 832 elems->parse_error = true; 833 break; 834 } 835 836 switch (id) { 837 case WLAN_EID_SSID: 838 case WLAN_EID_SUPP_RATES: 839 case WLAN_EID_FH_PARAMS: 840 case WLAN_EID_DS_PARAMS: 841 case WLAN_EID_CF_PARAMS: 842 case WLAN_EID_TIM: 843 case WLAN_EID_IBSS_PARAMS: 844 case WLAN_EID_CHALLENGE: 845 case WLAN_EID_RSN: 846 case WLAN_EID_ERP_INFO: 847 case WLAN_EID_EXT_SUPP_RATES: 848 case WLAN_EID_HT_CAPABILITY: 849 case WLAN_EID_HT_OPERATION: 850 case WLAN_EID_VHT_CAPABILITY: 851 case WLAN_EID_VHT_OPERATION: 852 case WLAN_EID_MESH_ID: 853 case WLAN_EID_MESH_CONFIG: 854 case WLAN_EID_PEER_MGMT: 855 case WLAN_EID_PREQ: 856 case WLAN_EID_PREP: 857 case WLAN_EID_PERR: 858 case WLAN_EID_RANN: 859 case WLAN_EID_CHANNEL_SWITCH: 860 case WLAN_EID_EXT_CHANSWITCH_ANN: 861 case WLAN_EID_COUNTRY: 862 case WLAN_EID_PWR_CONSTRAINT: 863 case WLAN_EID_TIMEOUT_INTERVAL: 864 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 865 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 866 case WLAN_EID_CHAN_SWITCH_PARAM: 867 case WLAN_EID_EXT_CAPABILITY: 868 case WLAN_EID_CHAN_SWITCH_TIMING: 869 case WLAN_EID_LINK_ID: 870 /* 871 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 872 * that if the content gets bigger it might be needed more than once 873 */ 874 if (test_bit(id, seen_elems)) { 875 elems->parse_error = true; 876 left -= elen; 877 pos += elen; 878 continue; 879 } 880 break; 881 } 882 883 if (calc_crc && id < 64 && (filter & (1ULL << id))) 884 crc = crc32_be(crc, pos - 2, elen + 2); 885 886 elem_parse_failed = false; 887 888 switch (id) { 889 case WLAN_EID_LINK_ID: 890 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 891 elem_parse_failed = true; 892 break; 893 } 894 elems->lnk_id = (void *)(pos - 2); 895 break; 896 case WLAN_EID_CHAN_SWITCH_TIMING: 897 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 898 elem_parse_failed = true; 899 break; 900 } 901 elems->ch_sw_timing = (void *)pos; 902 break; 903 case WLAN_EID_EXT_CAPABILITY: 904 elems->ext_capab = pos; 905 elems->ext_capab_len = elen; 906 break; 907 case WLAN_EID_SSID: 908 elems->ssid = pos; 909 elems->ssid_len = elen; 910 break; 911 case WLAN_EID_SUPP_RATES: 912 elems->supp_rates = pos; 913 elems->supp_rates_len = elen; 914 break; 915 case WLAN_EID_DS_PARAMS: 916 if (elen >= 1) 917 elems->ds_params = pos; 918 else 919 elem_parse_failed = true; 920 break; 921 case WLAN_EID_TIM: 922 if (elen >= sizeof(struct ieee80211_tim_ie)) { 923 elems->tim = (void *)pos; 924 elems->tim_len = elen; 925 } else 926 elem_parse_failed = true; 927 break; 928 case WLAN_EID_CHALLENGE: 929 elems->challenge = pos; 930 elems->challenge_len = elen; 931 break; 932 case WLAN_EID_VENDOR_SPECIFIC: 933 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 934 pos[2] == 0xf2) { 935 /* Microsoft OUI (00:50:F2) */ 936 937 if (calc_crc) 938 crc = crc32_be(crc, pos - 2, elen + 2); 939 940 if (elen >= 5 && pos[3] == 2) { 941 /* OUI Type 2 - WMM IE */ 942 if (pos[4] == 0) { 943 elems->wmm_info = pos; 944 elems->wmm_info_len = elen; 945 } else if (pos[4] == 1) { 946 elems->wmm_param = pos; 947 elems->wmm_param_len = elen; 948 } 949 } 950 } 951 break; 952 case WLAN_EID_RSN: 953 elems->rsn = pos; 954 elems->rsn_len = elen; 955 break; 956 case WLAN_EID_ERP_INFO: 957 if (elen >= 1) 958 elems->erp_info = pos; 959 else 960 elem_parse_failed = true; 961 break; 962 case WLAN_EID_EXT_SUPP_RATES: 963 elems->ext_supp_rates = pos; 964 elems->ext_supp_rates_len = elen; 965 break; 966 case WLAN_EID_HT_CAPABILITY: 967 if (elen >= sizeof(struct ieee80211_ht_cap)) 968 elems->ht_cap_elem = (void *)pos; 969 else 970 elem_parse_failed = true; 971 break; 972 case WLAN_EID_HT_OPERATION: 973 if (elen >= sizeof(struct ieee80211_ht_operation)) 974 elems->ht_operation = (void *)pos; 975 else 976 elem_parse_failed = true; 977 break; 978 case WLAN_EID_VHT_CAPABILITY: 979 if (elen >= sizeof(struct ieee80211_vht_cap)) 980 elems->vht_cap_elem = (void *)pos; 981 else 982 elem_parse_failed = true; 983 break; 984 case WLAN_EID_VHT_OPERATION: 985 if (elen >= sizeof(struct ieee80211_vht_operation)) 986 elems->vht_operation = (void *)pos; 987 else 988 elem_parse_failed = true; 989 break; 990 case WLAN_EID_OPMODE_NOTIF: 991 if (elen > 0) 992 elems->opmode_notif = pos; 993 else 994 elem_parse_failed = true; 995 break; 996 case WLAN_EID_MESH_ID: 997 elems->mesh_id = pos; 998 elems->mesh_id_len = elen; 999 break; 1000 case WLAN_EID_MESH_CONFIG: 1001 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1002 elems->mesh_config = (void *)pos; 1003 else 1004 elem_parse_failed = true; 1005 break; 1006 case WLAN_EID_PEER_MGMT: 1007 elems->peering = pos; 1008 elems->peering_len = elen; 1009 break; 1010 case WLAN_EID_MESH_AWAKE_WINDOW: 1011 if (elen >= 2) 1012 elems->awake_window = (void *)pos; 1013 break; 1014 case WLAN_EID_PREQ: 1015 elems->preq = pos; 1016 elems->preq_len = elen; 1017 break; 1018 case WLAN_EID_PREP: 1019 elems->prep = pos; 1020 elems->prep_len = elen; 1021 break; 1022 case WLAN_EID_PERR: 1023 elems->perr = pos; 1024 elems->perr_len = elen; 1025 break; 1026 case WLAN_EID_RANN: 1027 if (elen >= sizeof(struct ieee80211_rann_ie)) 1028 elems->rann = (void *)pos; 1029 else 1030 elem_parse_failed = true; 1031 break; 1032 case WLAN_EID_CHANNEL_SWITCH: 1033 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1034 elem_parse_failed = true; 1035 break; 1036 } 1037 elems->ch_switch_ie = (void *)pos; 1038 break; 1039 case WLAN_EID_EXT_CHANSWITCH_ANN: 1040 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1041 elem_parse_failed = true; 1042 break; 1043 } 1044 elems->ext_chansw_ie = (void *)pos; 1045 break; 1046 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1047 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1048 elem_parse_failed = true; 1049 break; 1050 } 1051 elems->sec_chan_offs = (void *)pos; 1052 break; 1053 case WLAN_EID_CHAN_SWITCH_PARAM: 1054 if (elen != 1055 sizeof(*elems->mesh_chansw_params_ie)) { 1056 elem_parse_failed = true; 1057 break; 1058 } 1059 elems->mesh_chansw_params_ie = (void *)pos; 1060 break; 1061 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1062 if (!action || 1063 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1064 elem_parse_failed = true; 1065 break; 1066 } 1067 elems->wide_bw_chansw_ie = (void *)pos; 1068 break; 1069 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1070 if (action) { 1071 elem_parse_failed = true; 1072 break; 1073 } 1074 /* 1075 * This is a bit tricky, but as we only care about 1076 * the wide bandwidth channel switch element, so 1077 * just parse it out manually. 1078 */ 1079 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1080 pos, elen); 1081 if (ie) { 1082 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1083 elems->wide_bw_chansw_ie = 1084 (void *)(ie + 2); 1085 else 1086 elem_parse_failed = true; 1087 } 1088 break; 1089 case WLAN_EID_COUNTRY: 1090 elems->country_elem = pos; 1091 elems->country_elem_len = elen; 1092 break; 1093 case WLAN_EID_PWR_CONSTRAINT: 1094 if (elen != 1) { 1095 elem_parse_failed = true; 1096 break; 1097 } 1098 elems->pwr_constr_elem = pos; 1099 break; 1100 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1101 /* Lots of different options exist, but we only care 1102 * about the Dynamic Transmit Power Control element. 1103 * First check for the Cisco OUI, then for the DTPC 1104 * tag (0x00). 1105 */ 1106 if (elen < 4) { 1107 elem_parse_failed = true; 1108 break; 1109 } 1110 1111 if (pos[0] != 0x00 || pos[1] != 0x40 || 1112 pos[2] != 0x96 || pos[3] != 0x00) 1113 break; 1114 1115 if (elen != 6) { 1116 elem_parse_failed = true; 1117 break; 1118 } 1119 1120 if (calc_crc) 1121 crc = crc32_be(crc, pos - 2, elen + 2); 1122 1123 elems->cisco_dtpc_elem = pos; 1124 break; 1125 case WLAN_EID_TIMEOUT_INTERVAL: 1126 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1127 elems->timeout_int = (void *)pos; 1128 else 1129 elem_parse_failed = true; 1130 break; 1131 default: 1132 break; 1133 } 1134 1135 if (elem_parse_failed) 1136 elems->parse_error = true; 1137 else 1138 __set_bit(id, seen_elems); 1139 1140 left -= elen; 1141 pos += elen; 1142 } 1143 1144 if (left != 0) 1145 elems->parse_error = true; 1146 1147 return crc; 1148 } 1149 1150 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1151 bool bss_notify) 1152 { 1153 struct ieee80211_local *local = sdata->local; 1154 struct ieee80211_tx_queue_params qparam; 1155 struct ieee80211_chanctx_conf *chanctx_conf; 1156 int ac; 1157 bool use_11b, enable_qos; 1158 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1159 int aCWmin, aCWmax; 1160 1161 if (!local->ops->conf_tx) 1162 return; 1163 1164 if (local->hw.queues < IEEE80211_NUM_ACS) 1165 return; 1166 1167 memset(&qparam, 0, sizeof(qparam)); 1168 1169 rcu_read_lock(); 1170 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1171 use_11b = (chanctx_conf && 1172 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) && 1173 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1174 rcu_read_unlock(); 1175 1176 /* 1177 * By default disable QoS in STA mode for old access points, which do 1178 * not support 802.11e. New APs will provide proper queue parameters, 1179 * that we will configure later. 1180 */ 1181 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION); 1182 1183 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1184 1185 /* Set defaults according to 802.11-2007 Table 7-37 */ 1186 aCWmax = 1023; 1187 if (use_11b) 1188 aCWmin = 31; 1189 else 1190 aCWmin = 15; 1191 1192 /* Confiure old 802.11b/g medium access rules. */ 1193 qparam.cw_max = aCWmax; 1194 qparam.cw_min = aCWmin; 1195 qparam.txop = 0; 1196 qparam.aifs = 2; 1197 1198 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1199 /* Update if QoS is enabled. */ 1200 if (enable_qos) { 1201 switch (ac) { 1202 case IEEE80211_AC_BK: 1203 qparam.cw_max = aCWmax; 1204 qparam.cw_min = aCWmin; 1205 qparam.txop = 0; 1206 if (is_ocb) 1207 qparam.aifs = 9; 1208 else 1209 qparam.aifs = 7; 1210 break; 1211 /* never happens but let's not leave undefined */ 1212 default: 1213 case IEEE80211_AC_BE: 1214 qparam.cw_max = aCWmax; 1215 qparam.cw_min = aCWmin; 1216 qparam.txop = 0; 1217 if (is_ocb) 1218 qparam.aifs = 6; 1219 else 1220 qparam.aifs = 3; 1221 break; 1222 case IEEE80211_AC_VI: 1223 qparam.cw_max = aCWmin; 1224 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1225 if (is_ocb) 1226 qparam.txop = 0; 1227 else if (use_11b) 1228 qparam.txop = 6016/32; 1229 else 1230 qparam.txop = 3008/32; 1231 1232 if (is_ocb) 1233 qparam.aifs = 3; 1234 else 1235 qparam.aifs = 2; 1236 break; 1237 case IEEE80211_AC_VO: 1238 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1239 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1240 if (is_ocb) 1241 qparam.txop = 0; 1242 else if (use_11b) 1243 qparam.txop = 3264/32; 1244 else 1245 qparam.txop = 1504/32; 1246 qparam.aifs = 2; 1247 break; 1248 } 1249 } 1250 1251 qparam.uapsd = false; 1252 1253 sdata->tx_conf[ac] = qparam; 1254 drv_conf_tx(local, sdata, ac, &qparam); 1255 } 1256 1257 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1258 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { 1259 sdata->vif.bss_conf.qos = enable_qos; 1260 if (bss_notify) 1261 ieee80211_bss_info_change_notify(sdata, 1262 BSS_CHANGED_QOS); 1263 } 1264 } 1265 1266 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1267 u16 transaction, u16 auth_alg, u16 status, 1268 const u8 *extra, size_t extra_len, const u8 *da, 1269 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1270 u32 tx_flags) 1271 { 1272 struct ieee80211_local *local = sdata->local; 1273 struct sk_buff *skb; 1274 struct ieee80211_mgmt *mgmt; 1275 int err; 1276 1277 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1278 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1279 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1280 if (!skb) 1281 return; 1282 1283 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1284 1285 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); 1286 memset(mgmt, 0, 24 + 6); 1287 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1288 IEEE80211_STYPE_AUTH); 1289 memcpy(mgmt->da, da, ETH_ALEN); 1290 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1291 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1292 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1293 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1294 mgmt->u.auth.status_code = cpu_to_le16(status); 1295 if (extra) 1296 memcpy(skb_put(skb, extra_len), extra, extra_len); 1297 1298 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1299 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1300 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1301 WARN_ON(err); 1302 } 1303 1304 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1305 tx_flags; 1306 ieee80211_tx_skb(sdata, skb); 1307 } 1308 1309 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1310 const u8 *bssid, u16 stype, u16 reason, 1311 bool send_frame, u8 *frame_buf) 1312 { 1313 struct ieee80211_local *local = sdata->local; 1314 struct sk_buff *skb; 1315 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1316 1317 /* build frame */ 1318 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1319 mgmt->duration = 0; /* initialize only */ 1320 mgmt->seq_ctrl = 0; /* initialize only */ 1321 memcpy(mgmt->da, bssid, ETH_ALEN); 1322 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1323 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1324 /* u.deauth.reason_code == u.disassoc.reason_code */ 1325 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1326 1327 if (send_frame) { 1328 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1329 IEEE80211_DEAUTH_FRAME_LEN); 1330 if (!skb) 1331 return; 1332 1333 skb_reserve(skb, local->hw.extra_tx_headroom); 1334 1335 /* copy in frame */ 1336 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), 1337 mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1338 1339 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1340 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1341 IEEE80211_SKB_CB(skb)->flags |= 1342 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1343 1344 ieee80211_tx_skb(sdata, skb); 1345 } 1346 } 1347 1348 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1349 u8 *buffer, size_t buffer_len, 1350 const u8 *ie, size_t ie_len, 1351 enum ieee80211_band band, 1352 u32 rate_mask, 1353 struct cfg80211_chan_def *chandef, 1354 size_t *offset) 1355 { 1356 struct ieee80211_supported_band *sband; 1357 u8 *pos = buffer, *end = buffer + buffer_len; 1358 size_t noffset; 1359 int supp_rates_len, i; 1360 u8 rates[32]; 1361 int num_rates; 1362 int ext_rates_len; 1363 int shift; 1364 u32 rate_flags; 1365 bool have_80mhz = false; 1366 1367 *offset = 0; 1368 1369 sband = local->hw.wiphy->bands[band]; 1370 if (WARN_ON_ONCE(!sband)) 1371 return 0; 1372 1373 rate_flags = ieee80211_chandef_rate_flags(chandef); 1374 shift = ieee80211_chandef_get_shift(chandef); 1375 1376 num_rates = 0; 1377 for (i = 0; i < sband->n_bitrates; i++) { 1378 if ((BIT(i) & rate_mask) == 0) 1379 continue; /* skip rate */ 1380 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1381 continue; 1382 1383 rates[num_rates++] = 1384 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1385 (1 << shift) * 5); 1386 } 1387 1388 supp_rates_len = min_t(int, num_rates, 8); 1389 1390 if (end - pos < 2 + supp_rates_len) 1391 goto out_err; 1392 *pos++ = WLAN_EID_SUPP_RATES; 1393 *pos++ = supp_rates_len; 1394 memcpy(pos, rates, supp_rates_len); 1395 pos += supp_rates_len; 1396 1397 /* insert "request information" if in custom IEs */ 1398 if (ie && ie_len) { 1399 static const u8 before_extrates[] = { 1400 WLAN_EID_SSID, 1401 WLAN_EID_SUPP_RATES, 1402 WLAN_EID_REQUEST, 1403 }; 1404 noffset = ieee80211_ie_split(ie, ie_len, 1405 before_extrates, 1406 ARRAY_SIZE(before_extrates), 1407 *offset); 1408 if (end - pos < noffset - *offset) 1409 goto out_err; 1410 memcpy(pos, ie + *offset, noffset - *offset); 1411 pos += noffset - *offset; 1412 *offset = noffset; 1413 } 1414 1415 ext_rates_len = num_rates - supp_rates_len; 1416 if (ext_rates_len > 0) { 1417 if (end - pos < 2 + ext_rates_len) 1418 goto out_err; 1419 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1420 *pos++ = ext_rates_len; 1421 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1422 pos += ext_rates_len; 1423 } 1424 1425 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) { 1426 if (end - pos < 3) 1427 goto out_err; 1428 *pos++ = WLAN_EID_DS_PARAMS; 1429 *pos++ = 1; 1430 *pos++ = ieee80211_frequency_to_channel( 1431 chandef->chan->center_freq); 1432 } 1433 1434 /* insert custom IEs that go before HT */ 1435 if (ie && ie_len) { 1436 static const u8 before_ht[] = { 1437 WLAN_EID_SSID, 1438 WLAN_EID_SUPP_RATES, 1439 WLAN_EID_REQUEST, 1440 WLAN_EID_EXT_SUPP_RATES, 1441 WLAN_EID_DS_PARAMS, 1442 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1443 }; 1444 noffset = ieee80211_ie_split(ie, ie_len, 1445 before_ht, ARRAY_SIZE(before_ht), 1446 *offset); 1447 if (end - pos < noffset - *offset) 1448 goto out_err; 1449 memcpy(pos, ie + *offset, noffset - *offset); 1450 pos += noffset - *offset; 1451 *offset = noffset; 1452 } 1453 1454 if (sband->ht_cap.ht_supported) { 1455 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1456 goto out_err; 1457 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1458 sband->ht_cap.cap); 1459 } 1460 1461 /* 1462 * If adding more here, adjust code in main.c 1463 * that calculates local->scan_ies_len. 1464 */ 1465 1466 /* insert custom IEs that go before VHT */ 1467 if (ie && ie_len) { 1468 static const u8 before_vht[] = { 1469 WLAN_EID_SSID, 1470 WLAN_EID_SUPP_RATES, 1471 WLAN_EID_REQUEST, 1472 WLAN_EID_EXT_SUPP_RATES, 1473 WLAN_EID_DS_PARAMS, 1474 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1475 WLAN_EID_HT_CAPABILITY, 1476 WLAN_EID_BSS_COEX_2040, 1477 WLAN_EID_EXT_CAPABILITY, 1478 WLAN_EID_SSID_LIST, 1479 WLAN_EID_CHANNEL_USAGE, 1480 WLAN_EID_INTERWORKING, 1481 /* mesh ID can't happen here */ 1482 /* 60 GHz can't happen here right now */ 1483 }; 1484 noffset = ieee80211_ie_split(ie, ie_len, 1485 before_vht, ARRAY_SIZE(before_vht), 1486 *offset); 1487 if (end - pos < noffset - *offset) 1488 goto out_err; 1489 memcpy(pos, ie + *offset, noffset - *offset); 1490 pos += noffset - *offset; 1491 *offset = noffset; 1492 } 1493 1494 /* Check if any channel in this sband supports at least 80 MHz */ 1495 for (i = 0; i < sband->n_channels; i++) { 1496 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1497 IEEE80211_CHAN_NO_80MHZ)) 1498 continue; 1499 1500 have_80mhz = true; 1501 break; 1502 } 1503 1504 if (sband->vht_cap.vht_supported && have_80mhz) { 1505 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1506 goto out_err; 1507 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1508 sband->vht_cap.cap); 1509 } 1510 1511 return pos - buffer; 1512 out_err: 1513 WARN_ONCE(1, "not enough space for preq IEs\n"); 1514 return pos - buffer; 1515 } 1516 1517 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1518 size_t buffer_len, 1519 struct ieee80211_scan_ies *ie_desc, 1520 const u8 *ie, size_t ie_len, 1521 u8 bands_used, u32 *rate_masks, 1522 struct cfg80211_chan_def *chandef) 1523 { 1524 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1525 int i; 1526 1527 memset(ie_desc, 0, sizeof(*ie_desc)); 1528 1529 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1530 if (bands_used & BIT(i)) { 1531 pos += ieee80211_build_preq_ies_band(local, 1532 buffer + pos, 1533 buffer_len - pos, 1534 ie, ie_len, i, 1535 rate_masks[i], 1536 chandef, 1537 &custom_ie_offset); 1538 ie_desc->ies[i] = buffer + old_pos; 1539 ie_desc->len[i] = pos - old_pos; 1540 old_pos = pos; 1541 } 1542 } 1543 1544 /* add any remaining custom IEs */ 1545 if (ie && ie_len) { 1546 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1547 "not enough space for preq custom IEs\n")) 1548 return pos; 1549 memcpy(buffer + pos, ie + custom_ie_offset, 1550 ie_len - custom_ie_offset); 1551 ie_desc->common_ies = buffer + pos; 1552 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1553 pos += ie_len - custom_ie_offset; 1554 } 1555 1556 return pos; 1557 }; 1558 1559 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1560 const u8 *src, const u8 *dst, 1561 u32 ratemask, 1562 struct ieee80211_channel *chan, 1563 const u8 *ssid, size_t ssid_len, 1564 const u8 *ie, size_t ie_len, 1565 bool directed) 1566 { 1567 struct ieee80211_local *local = sdata->local; 1568 struct cfg80211_chan_def chandef; 1569 struct sk_buff *skb; 1570 struct ieee80211_mgmt *mgmt; 1571 int ies_len; 1572 u32 rate_masks[IEEE80211_NUM_BANDS] = {}; 1573 struct ieee80211_scan_ies dummy_ie_desc; 1574 1575 /* 1576 * Do not send DS Channel parameter for directed probe requests 1577 * in order to maximize the chance that we get a response. Some 1578 * badly-behaved APs don't respond when this parameter is included. 1579 */ 1580 chandef.width = sdata->vif.bss_conf.chandef.width; 1581 if (directed) 1582 chandef.chan = NULL; 1583 else 1584 chandef.chan = chan; 1585 1586 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1587 100 + ie_len); 1588 if (!skb) 1589 return NULL; 1590 1591 rate_masks[chan->band] = ratemask; 1592 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1593 skb_tailroom(skb), &dummy_ie_desc, 1594 ie, ie_len, BIT(chan->band), 1595 rate_masks, &chandef); 1596 skb_put(skb, ies_len); 1597 1598 if (dst) { 1599 mgmt = (struct ieee80211_mgmt *) skb->data; 1600 memcpy(mgmt->da, dst, ETH_ALEN); 1601 memcpy(mgmt->bssid, dst, ETH_ALEN); 1602 } 1603 1604 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1605 1606 return skb; 1607 } 1608 1609 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, 1610 const u8 *src, const u8 *dst, 1611 const u8 *ssid, size_t ssid_len, 1612 const u8 *ie, size_t ie_len, 1613 u32 ratemask, bool directed, u32 tx_flags, 1614 struct ieee80211_channel *channel, bool scan) 1615 { 1616 struct sk_buff *skb; 1617 1618 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, 1619 ssid, ssid_len, 1620 ie, ie_len, directed); 1621 if (skb) { 1622 IEEE80211_SKB_CB(skb)->flags |= tx_flags; 1623 if (scan) 1624 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); 1625 else 1626 ieee80211_tx_skb(sdata, skb); 1627 } 1628 } 1629 1630 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1631 struct ieee802_11_elems *elems, 1632 enum ieee80211_band band, u32 *basic_rates) 1633 { 1634 struct ieee80211_supported_band *sband; 1635 size_t num_rates; 1636 u32 supp_rates, rate_flags; 1637 int i, j, shift; 1638 sband = sdata->local->hw.wiphy->bands[band]; 1639 1640 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1641 shift = ieee80211_vif_get_shift(&sdata->vif); 1642 1643 if (WARN_ON(!sband)) 1644 return 1; 1645 1646 num_rates = sband->n_bitrates; 1647 supp_rates = 0; 1648 for (i = 0; i < elems->supp_rates_len + 1649 elems->ext_supp_rates_len; i++) { 1650 u8 rate = 0; 1651 int own_rate; 1652 bool is_basic; 1653 if (i < elems->supp_rates_len) 1654 rate = elems->supp_rates[i]; 1655 else if (elems->ext_supp_rates) 1656 rate = elems->ext_supp_rates 1657 [i - elems->supp_rates_len]; 1658 own_rate = 5 * (rate & 0x7f); 1659 is_basic = !!(rate & 0x80); 1660 1661 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1662 continue; 1663 1664 for (j = 0; j < num_rates; j++) { 1665 int brate; 1666 if ((rate_flags & sband->bitrates[j].flags) 1667 != rate_flags) 1668 continue; 1669 1670 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1671 1 << shift); 1672 1673 if (brate == own_rate) { 1674 supp_rates |= BIT(j); 1675 if (basic_rates && is_basic) 1676 *basic_rates |= BIT(j); 1677 } 1678 } 1679 } 1680 return supp_rates; 1681 } 1682 1683 void ieee80211_stop_device(struct ieee80211_local *local) 1684 { 1685 ieee80211_led_radio(local, false); 1686 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1687 1688 cancel_work_sync(&local->reconfig_filter); 1689 1690 flush_workqueue(local->workqueue); 1691 drv_stop(local); 1692 } 1693 1694 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1695 { 1696 struct ieee80211_sub_if_data *sdata; 1697 struct ieee80211_chanctx *ctx; 1698 1699 /* 1700 * We get here if during resume the device can't be restarted properly. 1701 * We might also get here if this happens during HW reset, which is a 1702 * slightly different situation and we need to drop all connections in 1703 * the latter case. 1704 * 1705 * Ask cfg80211 to turn off all interfaces, this will result in more 1706 * warnings but at least we'll then get into a clean stopped state. 1707 */ 1708 1709 local->resuming = false; 1710 local->suspended = false; 1711 local->started = false; 1712 1713 /* scheduled scan clearly can't be running any more, but tell 1714 * cfg80211 and clear local state 1715 */ 1716 ieee80211_sched_scan_end(local); 1717 1718 list_for_each_entry(sdata, &local->interfaces, list) 1719 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1720 1721 /* Mark channel contexts as not being in the driver any more to avoid 1722 * removing them from the driver during the shutdown process... 1723 */ 1724 mutex_lock(&local->chanctx_mtx); 1725 list_for_each_entry(ctx, &local->chanctx_list, list) 1726 ctx->driver_present = false; 1727 mutex_unlock(&local->chanctx_mtx); 1728 1729 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1730 } 1731 1732 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1733 struct ieee80211_sub_if_data *sdata) 1734 { 1735 struct ieee80211_chanctx_conf *conf; 1736 struct ieee80211_chanctx *ctx; 1737 1738 if (!local->use_chanctx) 1739 return; 1740 1741 mutex_lock(&local->chanctx_mtx); 1742 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1743 lockdep_is_held(&local->chanctx_mtx)); 1744 if (conf) { 1745 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1746 drv_assign_vif_chanctx(local, sdata, ctx); 1747 } 1748 mutex_unlock(&local->chanctx_mtx); 1749 } 1750 1751 int ieee80211_reconfig(struct ieee80211_local *local) 1752 { 1753 struct ieee80211_hw *hw = &local->hw; 1754 struct ieee80211_sub_if_data *sdata; 1755 struct ieee80211_chanctx *ctx; 1756 struct sta_info *sta; 1757 int res, i; 1758 bool reconfig_due_to_wowlan = false; 1759 struct ieee80211_sub_if_data *sched_scan_sdata; 1760 struct cfg80211_sched_scan_request *sched_scan_req; 1761 bool sched_scan_stopped = false; 1762 1763 /* nothing to do if HW shouldn't run */ 1764 if (!local->open_count) 1765 goto wake_up; 1766 1767 #ifdef CONFIG_PM 1768 if (local->suspended) 1769 local->resuming = true; 1770 1771 if (local->wowlan) { 1772 res = drv_resume(local); 1773 local->wowlan = false; 1774 if (res < 0) { 1775 local->resuming = false; 1776 return res; 1777 } 1778 if (res == 0) 1779 goto wake_up; 1780 WARN_ON(res > 1); 1781 /* 1782 * res is 1, which means the driver requested 1783 * to go through a regular reset on wakeup. 1784 */ 1785 reconfig_due_to_wowlan = true; 1786 } 1787 #endif 1788 1789 /* 1790 * Upon resume hardware can sometimes be goofy due to 1791 * various platform / driver / bus issues, so restarting 1792 * the device may at times not work immediately. Propagate 1793 * the error. 1794 */ 1795 res = drv_start(local); 1796 if (res) { 1797 if (local->suspended) 1798 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1799 else 1800 WARN(1, "Hardware became unavailable during restart.\n"); 1801 ieee80211_handle_reconfig_failure(local); 1802 return res; 1803 } 1804 1805 /* setup fragmentation threshold */ 1806 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1807 1808 /* setup RTS threshold */ 1809 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1810 1811 /* reset coverage class */ 1812 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1813 1814 ieee80211_led_radio(local, true); 1815 ieee80211_mod_tpt_led_trig(local, 1816 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1817 1818 /* add interfaces */ 1819 sdata = rtnl_dereference(local->monitor_sdata); 1820 if (sdata) { 1821 /* in HW restart it exists already */ 1822 WARN_ON(local->resuming); 1823 res = drv_add_interface(local, sdata); 1824 if (WARN_ON(res)) { 1825 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1826 synchronize_net(); 1827 kfree(sdata); 1828 } 1829 } 1830 1831 list_for_each_entry(sdata, &local->interfaces, list) { 1832 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1833 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1834 ieee80211_sdata_running(sdata)) { 1835 res = drv_add_interface(local, sdata); 1836 if (WARN_ON(res)) 1837 break; 1838 } 1839 } 1840 1841 /* If adding any of the interfaces failed above, roll back and 1842 * report failure. 1843 */ 1844 if (res) { 1845 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 1846 list) 1847 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1848 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1849 ieee80211_sdata_running(sdata)) 1850 drv_remove_interface(local, sdata); 1851 ieee80211_handle_reconfig_failure(local); 1852 return res; 1853 } 1854 1855 /* add channel contexts */ 1856 if (local->use_chanctx) { 1857 mutex_lock(&local->chanctx_mtx); 1858 list_for_each_entry(ctx, &local->chanctx_list, list) 1859 if (ctx->replace_state != 1860 IEEE80211_CHANCTX_REPLACES_OTHER) 1861 WARN_ON(drv_add_chanctx(local, ctx)); 1862 mutex_unlock(&local->chanctx_mtx); 1863 1864 list_for_each_entry(sdata, &local->interfaces, list) { 1865 if (!ieee80211_sdata_running(sdata)) 1866 continue; 1867 ieee80211_assign_chanctx(local, sdata); 1868 } 1869 1870 sdata = rtnl_dereference(local->monitor_sdata); 1871 if (sdata && ieee80211_sdata_running(sdata)) 1872 ieee80211_assign_chanctx(local, sdata); 1873 } 1874 1875 /* add STAs back */ 1876 mutex_lock(&local->sta_mtx); 1877 list_for_each_entry(sta, &local->sta_list, list) { 1878 enum ieee80211_sta_state state; 1879 1880 if (!sta->uploaded) 1881 continue; 1882 1883 /* AP-mode stations will be added later */ 1884 if (sta->sdata->vif.type == NL80211_IFTYPE_AP) 1885 continue; 1886 1887 for (state = IEEE80211_STA_NOTEXIST; 1888 state < sta->sta_state; state++) 1889 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1890 state + 1)); 1891 } 1892 mutex_unlock(&local->sta_mtx); 1893 1894 /* reconfigure tx conf */ 1895 if (hw->queues >= IEEE80211_NUM_ACS) { 1896 list_for_each_entry(sdata, &local->interfaces, list) { 1897 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1898 sdata->vif.type == NL80211_IFTYPE_MONITOR || 1899 !ieee80211_sdata_running(sdata)) 1900 continue; 1901 1902 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1903 drv_conf_tx(local, sdata, i, 1904 &sdata->tx_conf[i]); 1905 } 1906 } 1907 1908 /* reconfigure hardware */ 1909 ieee80211_hw_config(local, ~0); 1910 1911 ieee80211_configure_filter(local); 1912 1913 /* Finally also reconfigure all the BSS information */ 1914 list_for_each_entry(sdata, &local->interfaces, list) { 1915 u32 changed; 1916 1917 if (!ieee80211_sdata_running(sdata)) 1918 continue; 1919 1920 /* common change flags for all interface types */ 1921 changed = BSS_CHANGED_ERP_CTS_PROT | 1922 BSS_CHANGED_ERP_PREAMBLE | 1923 BSS_CHANGED_ERP_SLOT | 1924 BSS_CHANGED_HT | 1925 BSS_CHANGED_BASIC_RATES | 1926 BSS_CHANGED_BEACON_INT | 1927 BSS_CHANGED_BSSID | 1928 BSS_CHANGED_CQM | 1929 BSS_CHANGED_QOS | 1930 BSS_CHANGED_IDLE | 1931 BSS_CHANGED_TXPOWER; 1932 1933 switch (sdata->vif.type) { 1934 case NL80211_IFTYPE_STATION: 1935 changed |= BSS_CHANGED_ASSOC | 1936 BSS_CHANGED_ARP_FILTER | 1937 BSS_CHANGED_PS; 1938 1939 /* Re-send beacon info report to the driver */ 1940 if (sdata->u.mgd.have_beacon) 1941 changed |= BSS_CHANGED_BEACON_INFO; 1942 1943 sdata_lock(sdata); 1944 ieee80211_bss_info_change_notify(sdata, changed); 1945 sdata_unlock(sdata); 1946 break; 1947 case NL80211_IFTYPE_OCB: 1948 changed |= BSS_CHANGED_OCB; 1949 ieee80211_bss_info_change_notify(sdata, changed); 1950 break; 1951 case NL80211_IFTYPE_ADHOC: 1952 changed |= BSS_CHANGED_IBSS; 1953 /* fall through */ 1954 case NL80211_IFTYPE_AP: 1955 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 1956 1957 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1958 changed |= BSS_CHANGED_AP_PROBE_RESP; 1959 1960 if (rcu_access_pointer(sdata->u.ap.beacon)) 1961 drv_start_ap(local, sdata); 1962 } 1963 1964 /* fall through */ 1965 case NL80211_IFTYPE_MESH_POINT: 1966 if (sdata->vif.bss_conf.enable_beacon) { 1967 changed |= BSS_CHANGED_BEACON | 1968 BSS_CHANGED_BEACON_ENABLED; 1969 ieee80211_bss_info_change_notify(sdata, changed); 1970 } 1971 break; 1972 case NL80211_IFTYPE_WDS: 1973 case NL80211_IFTYPE_AP_VLAN: 1974 case NL80211_IFTYPE_MONITOR: 1975 case NL80211_IFTYPE_P2P_DEVICE: 1976 /* nothing to do */ 1977 break; 1978 case NL80211_IFTYPE_UNSPECIFIED: 1979 case NUM_NL80211_IFTYPES: 1980 case NL80211_IFTYPE_P2P_CLIENT: 1981 case NL80211_IFTYPE_P2P_GO: 1982 WARN_ON(1); 1983 break; 1984 } 1985 } 1986 1987 ieee80211_recalc_ps(local, -1); 1988 1989 /* 1990 * The sta might be in psm against the ap (e.g. because 1991 * this was the state before a hw restart), so we 1992 * explicitly send a null packet in order to make sure 1993 * it'll sync against the ap (and get out of psm). 1994 */ 1995 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 1996 list_for_each_entry(sdata, &local->interfaces, list) { 1997 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1998 continue; 1999 if (!sdata->u.mgd.associated) 2000 continue; 2001 2002 ieee80211_send_nullfunc(local, sdata, 0); 2003 } 2004 } 2005 2006 /* APs are now beaconing, add back stations */ 2007 mutex_lock(&local->sta_mtx); 2008 list_for_each_entry(sta, &local->sta_list, list) { 2009 enum ieee80211_sta_state state; 2010 2011 if (!sta->uploaded) 2012 continue; 2013 2014 if (sta->sdata->vif.type != NL80211_IFTYPE_AP) 2015 continue; 2016 2017 for (state = IEEE80211_STA_NOTEXIST; 2018 state < sta->sta_state; state++) 2019 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2020 state + 1)); 2021 } 2022 mutex_unlock(&local->sta_mtx); 2023 2024 /* add back keys */ 2025 list_for_each_entry(sdata, &local->interfaces, list) 2026 ieee80211_reset_crypto_tx_tailroom(sdata); 2027 2028 list_for_each_entry(sdata, &local->interfaces, list) 2029 if (ieee80211_sdata_running(sdata)) 2030 ieee80211_enable_keys(sdata); 2031 2032 wake_up: 2033 local->in_reconfig = false; 2034 barrier(); 2035 2036 if (local->monitors == local->open_count && local->monitors > 0) 2037 ieee80211_add_virtual_monitor(local); 2038 2039 /* 2040 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2041 * sessions can be established after a resume. 2042 * 2043 * Also tear down aggregation sessions since reconfiguring 2044 * them in a hardware restart scenario is not easily done 2045 * right now, and the hardware will have lost information 2046 * about the sessions, but we and the AP still think they 2047 * are active. This is really a workaround though. 2048 */ 2049 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2050 mutex_lock(&local->sta_mtx); 2051 2052 list_for_each_entry(sta, &local->sta_list, list) { 2053 ieee80211_sta_tear_down_BA_sessions( 2054 sta, AGG_STOP_LOCAL_REQUEST); 2055 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2056 } 2057 2058 mutex_unlock(&local->sta_mtx); 2059 } 2060 2061 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2062 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2063 false); 2064 2065 /* 2066 * Reconfigure sched scan if it was interrupted by FW restart or 2067 * suspend. 2068 */ 2069 mutex_lock(&local->mtx); 2070 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2071 lockdep_is_held(&local->mtx)); 2072 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2073 lockdep_is_held(&local->mtx)); 2074 if (sched_scan_sdata && sched_scan_req) 2075 /* 2076 * Sched scan stopped, but we don't want to report it. Instead, 2077 * we're trying to reschedule. 2078 */ 2079 if (__ieee80211_request_sched_scan_start(sched_scan_sdata, 2080 sched_scan_req)) 2081 sched_scan_stopped = true; 2082 mutex_unlock(&local->mtx); 2083 2084 if (sched_scan_stopped) 2085 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy); 2086 2087 /* 2088 * If this is for hw restart things are still running. 2089 * We may want to change that later, however. 2090 */ 2091 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan)) 2092 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2093 2094 if (!local->suspended) 2095 return 0; 2096 2097 #ifdef CONFIG_PM 2098 /* first set suspended false, then resuming */ 2099 local->suspended = false; 2100 mb(); 2101 local->resuming = false; 2102 2103 /* It's possible that we don't handle the scan completion in 2104 * time during suspend, so if it's still marked as completed 2105 * here, queue the work and flush it to clean things up. 2106 * Instead of calling the worker function directly here, we 2107 * really queue it to avoid potential races with other flows 2108 * scheduling the same work. 2109 */ 2110 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2111 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2112 flush_delayed_work(&local->scan_work); 2113 } 2114 2115 if (local->open_count && !reconfig_due_to_wowlan) 2116 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2117 2118 list_for_each_entry(sdata, &local->interfaces, list) { 2119 if (!ieee80211_sdata_running(sdata)) 2120 continue; 2121 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2122 ieee80211_sta_restart(sdata); 2123 } 2124 2125 mod_timer(&local->sta_cleanup, jiffies + 1); 2126 #else 2127 WARN_ON(1); 2128 #endif 2129 2130 return 0; 2131 } 2132 2133 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2134 { 2135 struct ieee80211_sub_if_data *sdata; 2136 struct ieee80211_local *local; 2137 struct ieee80211_key *key; 2138 2139 if (WARN_ON(!vif)) 2140 return; 2141 2142 sdata = vif_to_sdata(vif); 2143 local = sdata->local; 2144 2145 if (WARN_ON(!local->resuming)) 2146 return; 2147 2148 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2149 return; 2150 2151 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2152 2153 mutex_lock(&local->key_mtx); 2154 list_for_each_entry(key, &sdata->key_list, list) 2155 key->flags |= KEY_FLAG_TAINTED; 2156 mutex_unlock(&local->key_mtx); 2157 } 2158 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2159 2160 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2161 { 2162 struct ieee80211_local *local = sdata->local; 2163 struct ieee80211_chanctx_conf *chanctx_conf; 2164 struct ieee80211_chanctx *chanctx; 2165 2166 mutex_lock(&local->chanctx_mtx); 2167 2168 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2169 lockdep_is_held(&local->chanctx_mtx)); 2170 2171 if (WARN_ON_ONCE(!chanctx_conf)) 2172 goto unlock; 2173 2174 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2175 ieee80211_recalc_smps_chanctx(local, chanctx); 2176 unlock: 2177 mutex_unlock(&local->chanctx_mtx); 2178 } 2179 2180 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2181 { 2182 struct ieee80211_local *local = sdata->local; 2183 struct ieee80211_chanctx_conf *chanctx_conf; 2184 struct ieee80211_chanctx *chanctx; 2185 2186 mutex_lock(&local->chanctx_mtx); 2187 2188 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2189 lockdep_is_held(&local->chanctx_mtx)); 2190 2191 if (WARN_ON_ONCE(!chanctx_conf)) 2192 goto unlock; 2193 2194 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2195 ieee80211_recalc_chanctx_min_def(local, chanctx); 2196 unlock: 2197 mutex_unlock(&local->chanctx_mtx); 2198 } 2199 2200 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2201 { 2202 size_t pos = offset; 2203 2204 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2205 pos += 2 + ies[pos + 1]; 2206 2207 return pos; 2208 } 2209 2210 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2211 int rssi_min_thold, 2212 int rssi_max_thold) 2213 { 2214 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2215 2216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2217 return; 2218 2219 /* 2220 * Scale up threshold values before storing it, as the RSSI averaging 2221 * algorithm uses a scaled up value as well. Change this scaling 2222 * factor if the RSSI averaging algorithm changes. 2223 */ 2224 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2225 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2226 } 2227 2228 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2229 int rssi_min_thold, 2230 int rssi_max_thold) 2231 { 2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2233 2234 WARN_ON(rssi_min_thold == rssi_max_thold || 2235 rssi_min_thold > rssi_max_thold); 2236 2237 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2238 rssi_max_thold); 2239 } 2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2241 2242 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2243 { 2244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2245 2246 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2247 } 2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2249 2250 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2251 u16 cap) 2252 { 2253 __le16 tmp; 2254 2255 *pos++ = WLAN_EID_HT_CAPABILITY; 2256 *pos++ = sizeof(struct ieee80211_ht_cap); 2257 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2258 2259 /* capability flags */ 2260 tmp = cpu_to_le16(cap); 2261 memcpy(pos, &tmp, sizeof(u16)); 2262 pos += sizeof(u16); 2263 2264 /* AMPDU parameters */ 2265 *pos++ = ht_cap->ampdu_factor | 2266 (ht_cap->ampdu_density << 2267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2268 2269 /* MCS set */ 2270 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2271 pos += sizeof(ht_cap->mcs); 2272 2273 /* extended capabilities */ 2274 pos += sizeof(__le16); 2275 2276 /* BF capabilities */ 2277 pos += sizeof(__le32); 2278 2279 /* antenna selection */ 2280 pos += sizeof(u8); 2281 2282 return pos; 2283 } 2284 2285 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2286 u32 cap) 2287 { 2288 __le32 tmp; 2289 2290 *pos++ = WLAN_EID_VHT_CAPABILITY; 2291 *pos++ = sizeof(struct ieee80211_vht_cap); 2292 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2293 2294 /* capability flags */ 2295 tmp = cpu_to_le32(cap); 2296 memcpy(pos, &tmp, sizeof(u32)); 2297 pos += sizeof(u32); 2298 2299 /* VHT MCS set */ 2300 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2301 pos += sizeof(vht_cap->vht_mcs); 2302 2303 return pos; 2304 } 2305 2306 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2307 const struct cfg80211_chan_def *chandef, 2308 u16 prot_mode) 2309 { 2310 struct ieee80211_ht_operation *ht_oper; 2311 /* Build HT Information */ 2312 *pos++ = WLAN_EID_HT_OPERATION; 2313 *pos++ = sizeof(struct ieee80211_ht_operation); 2314 ht_oper = (struct ieee80211_ht_operation *)pos; 2315 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2316 chandef->chan->center_freq); 2317 switch (chandef->width) { 2318 case NL80211_CHAN_WIDTH_160: 2319 case NL80211_CHAN_WIDTH_80P80: 2320 case NL80211_CHAN_WIDTH_80: 2321 case NL80211_CHAN_WIDTH_40: 2322 if (chandef->center_freq1 > chandef->chan->center_freq) 2323 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2324 else 2325 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2326 break; 2327 default: 2328 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2329 break; 2330 } 2331 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2332 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2333 chandef->width != NL80211_CHAN_WIDTH_20) 2334 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2335 2336 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2337 ht_oper->stbc_param = 0x0000; 2338 2339 /* It seems that Basic MCS set and Supported MCS set 2340 are identical for the first 10 bytes */ 2341 memset(&ht_oper->basic_set, 0, 16); 2342 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2343 2344 return pos + sizeof(struct ieee80211_ht_operation); 2345 } 2346 2347 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2348 const struct cfg80211_chan_def *chandef) 2349 { 2350 struct ieee80211_vht_operation *vht_oper; 2351 2352 *pos++ = WLAN_EID_VHT_OPERATION; 2353 *pos++ = sizeof(struct ieee80211_vht_operation); 2354 vht_oper = (struct ieee80211_vht_operation *)pos; 2355 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel( 2356 chandef->center_freq1); 2357 if (chandef->center_freq2) 2358 vht_oper->center_freq_seg2_idx = 2359 ieee80211_frequency_to_channel(chandef->center_freq2); 2360 2361 switch (chandef->width) { 2362 case NL80211_CHAN_WIDTH_160: 2363 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ; 2364 break; 2365 case NL80211_CHAN_WIDTH_80P80: 2366 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2367 break; 2368 case NL80211_CHAN_WIDTH_80: 2369 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2370 break; 2371 default: 2372 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2373 break; 2374 } 2375 2376 /* don't require special VHT peer rates */ 2377 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2378 2379 return pos + sizeof(struct ieee80211_vht_operation); 2380 } 2381 2382 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, 2383 const struct ieee80211_ht_operation *ht_oper, 2384 struct cfg80211_chan_def *chandef) 2385 { 2386 enum nl80211_channel_type channel_type; 2387 2388 if (!ht_oper) { 2389 cfg80211_chandef_create(chandef, control_chan, 2390 NL80211_CHAN_NO_HT); 2391 return; 2392 } 2393 2394 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2395 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2396 channel_type = NL80211_CHAN_HT20; 2397 break; 2398 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2399 channel_type = NL80211_CHAN_HT40PLUS; 2400 break; 2401 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2402 channel_type = NL80211_CHAN_HT40MINUS; 2403 break; 2404 default: 2405 channel_type = NL80211_CHAN_NO_HT; 2406 } 2407 2408 cfg80211_chandef_create(chandef, control_chan, channel_type); 2409 } 2410 2411 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan, 2412 const struct ieee80211_vht_operation *oper, 2413 struct cfg80211_chan_def *chandef) 2414 { 2415 if (!oper) 2416 return; 2417 2418 chandef->chan = control_chan; 2419 2420 switch (oper->chan_width) { 2421 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2422 break; 2423 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2424 chandef->width = NL80211_CHAN_WIDTH_80; 2425 break; 2426 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2427 chandef->width = NL80211_CHAN_WIDTH_160; 2428 break; 2429 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2430 chandef->width = NL80211_CHAN_WIDTH_80P80; 2431 break; 2432 default: 2433 break; 2434 } 2435 2436 chandef->center_freq1 = 2437 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, 2438 control_chan->band); 2439 chandef->center_freq2 = 2440 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx, 2441 control_chan->band); 2442 } 2443 2444 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2445 const struct ieee80211_supported_band *sband, 2446 const u8 *srates, int srates_len, u32 *rates) 2447 { 2448 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2449 int shift = ieee80211_chandef_get_shift(chandef); 2450 struct ieee80211_rate *br; 2451 int brate, rate, i, j, count = 0; 2452 2453 *rates = 0; 2454 2455 for (i = 0; i < srates_len; i++) { 2456 rate = srates[i] & 0x7f; 2457 2458 for (j = 0; j < sband->n_bitrates; j++) { 2459 br = &sband->bitrates[j]; 2460 if ((rate_flags & br->flags) != rate_flags) 2461 continue; 2462 2463 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2464 if (brate == rate) { 2465 *rates |= BIT(j); 2466 count++; 2467 break; 2468 } 2469 } 2470 } 2471 return count; 2472 } 2473 2474 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2475 struct sk_buff *skb, bool need_basic, 2476 enum ieee80211_band band) 2477 { 2478 struct ieee80211_local *local = sdata->local; 2479 struct ieee80211_supported_band *sband; 2480 int rate, shift; 2481 u8 i, rates, *pos; 2482 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2483 u32 rate_flags; 2484 2485 shift = ieee80211_vif_get_shift(&sdata->vif); 2486 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2487 sband = local->hw.wiphy->bands[band]; 2488 rates = 0; 2489 for (i = 0; i < sband->n_bitrates; i++) { 2490 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2491 continue; 2492 rates++; 2493 } 2494 if (rates > 8) 2495 rates = 8; 2496 2497 if (skb_tailroom(skb) < rates + 2) 2498 return -ENOMEM; 2499 2500 pos = skb_put(skb, rates + 2); 2501 *pos++ = WLAN_EID_SUPP_RATES; 2502 *pos++ = rates; 2503 for (i = 0; i < rates; i++) { 2504 u8 basic = 0; 2505 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2506 continue; 2507 2508 if (need_basic && basic_rates & BIT(i)) 2509 basic = 0x80; 2510 rate = sband->bitrates[i].bitrate; 2511 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2512 5 * (1 << shift)); 2513 *pos++ = basic | (u8) rate; 2514 } 2515 2516 return 0; 2517 } 2518 2519 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2520 struct sk_buff *skb, bool need_basic, 2521 enum ieee80211_band band) 2522 { 2523 struct ieee80211_local *local = sdata->local; 2524 struct ieee80211_supported_band *sband; 2525 int rate, shift; 2526 u8 i, exrates, *pos; 2527 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2528 u32 rate_flags; 2529 2530 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2531 shift = ieee80211_vif_get_shift(&sdata->vif); 2532 2533 sband = local->hw.wiphy->bands[band]; 2534 exrates = 0; 2535 for (i = 0; i < sband->n_bitrates; i++) { 2536 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2537 continue; 2538 exrates++; 2539 } 2540 2541 if (exrates > 8) 2542 exrates -= 8; 2543 else 2544 exrates = 0; 2545 2546 if (skb_tailroom(skb) < exrates + 2) 2547 return -ENOMEM; 2548 2549 if (exrates) { 2550 pos = skb_put(skb, exrates + 2); 2551 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2552 *pos++ = exrates; 2553 for (i = 8; i < sband->n_bitrates; i++) { 2554 u8 basic = 0; 2555 if ((rate_flags & sband->bitrates[i].flags) 2556 != rate_flags) 2557 continue; 2558 if (need_basic && basic_rates & BIT(i)) 2559 basic = 0x80; 2560 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2561 5 * (1 << shift)); 2562 *pos++ = basic | (u8) rate; 2563 } 2564 } 2565 return 0; 2566 } 2567 2568 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2569 { 2570 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2571 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2572 2573 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2574 /* non-managed type inferfaces */ 2575 return 0; 2576 } 2577 return ifmgd->ave_beacon_signal / 16; 2578 } 2579 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2580 2581 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2582 { 2583 if (!mcs) 2584 return 1; 2585 2586 /* TODO: consider rx_highest */ 2587 2588 if (mcs->rx_mask[3]) 2589 return 4; 2590 if (mcs->rx_mask[2]) 2591 return 3; 2592 if (mcs->rx_mask[1]) 2593 return 2; 2594 return 1; 2595 } 2596 2597 /** 2598 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2599 * @local: mac80211 hw info struct 2600 * @status: RX status 2601 * @mpdu_len: total MPDU length (including FCS) 2602 * @mpdu_offset: offset into MPDU to calculate timestamp at 2603 * 2604 * This function calculates the RX timestamp at the given MPDU offset, taking 2605 * into account what the RX timestamp was. An offset of 0 will just normalize 2606 * the timestamp to TSF at beginning of MPDU reception. 2607 */ 2608 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2609 struct ieee80211_rx_status *status, 2610 unsigned int mpdu_len, 2611 unsigned int mpdu_offset) 2612 { 2613 u64 ts = status->mactime; 2614 struct rate_info ri; 2615 u16 rate; 2616 2617 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2618 return 0; 2619 2620 memset(&ri, 0, sizeof(ri)); 2621 2622 /* Fill cfg80211 rate info */ 2623 if (status->flag & RX_FLAG_HT) { 2624 ri.mcs = status->rate_idx; 2625 ri.flags |= RATE_INFO_FLAGS_MCS; 2626 if (status->flag & RX_FLAG_40MHZ) 2627 ri.bw = RATE_INFO_BW_40; 2628 else 2629 ri.bw = RATE_INFO_BW_20; 2630 if (status->flag & RX_FLAG_SHORT_GI) 2631 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2632 } else if (status->flag & RX_FLAG_VHT) { 2633 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2634 ri.mcs = status->rate_idx; 2635 ri.nss = status->vht_nss; 2636 if (status->flag & RX_FLAG_40MHZ) 2637 ri.bw = RATE_INFO_BW_40; 2638 else if (status->vht_flag & RX_VHT_FLAG_80MHZ) 2639 ri.bw = RATE_INFO_BW_80; 2640 else if (status->vht_flag & RX_VHT_FLAG_160MHZ) 2641 ri.bw = RATE_INFO_BW_160; 2642 else 2643 ri.bw = RATE_INFO_BW_20; 2644 if (status->flag & RX_FLAG_SHORT_GI) 2645 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2646 } else { 2647 struct ieee80211_supported_band *sband; 2648 int shift = 0; 2649 int bitrate; 2650 2651 if (status->flag & RX_FLAG_10MHZ) { 2652 shift = 1; 2653 ri.bw = RATE_INFO_BW_10; 2654 } else if (status->flag & RX_FLAG_5MHZ) { 2655 shift = 2; 2656 ri.bw = RATE_INFO_BW_5; 2657 } else { 2658 ri.bw = RATE_INFO_BW_20; 2659 } 2660 2661 sband = local->hw.wiphy->bands[status->band]; 2662 bitrate = sband->bitrates[status->rate_idx].bitrate; 2663 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2664 } 2665 2666 rate = cfg80211_calculate_bitrate(&ri); 2667 if (WARN_ONCE(!rate, 2668 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n", 2669 status->flag, status->rate_idx, status->vht_nss)) 2670 return 0; 2671 2672 /* rewind from end of MPDU */ 2673 if (status->flag & RX_FLAG_MACTIME_END) 2674 ts -= mpdu_len * 8 * 10 / rate; 2675 2676 ts += mpdu_offset * 8 * 10 / rate; 2677 2678 return ts; 2679 } 2680 2681 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2682 { 2683 struct ieee80211_sub_if_data *sdata; 2684 struct cfg80211_chan_def chandef; 2685 2686 mutex_lock(&local->mtx); 2687 mutex_lock(&local->iflist_mtx); 2688 list_for_each_entry(sdata, &local->interfaces, list) { 2689 /* it might be waiting for the local->mtx, but then 2690 * by the time it gets it, sdata->wdev.cac_started 2691 * will no longer be true 2692 */ 2693 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2694 2695 if (sdata->wdev.cac_started) { 2696 chandef = sdata->vif.bss_conf.chandef; 2697 ieee80211_vif_release_channel(sdata); 2698 cfg80211_cac_event(sdata->dev, 2699 &chandef, 2700 NL80211_RADAR_CAC_ABORTED, 2701 GFP_KERNEL); 2702 } 2703 } 2704 mutex_unlock(&local->iflist_mtx); 2705 mutex_unlock(&local->mtx); 2706 } 2707 2708 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2709 { 2710 struct ieee80211_local *local = 2711 container_of(work, struct ieee80211_local, radar_detected_work); 2712 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2713 struct ieee80211_chanctx *ctx; 2714 int num_chanctx = 0; 2715 2716 mutex_lock(&local->chanctx_mtx); 2717 list_for_each_entry(ctx, &local->chanctx_list, list) { 2718 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 2719 continue; 2720 2721 num_chanctx++; 2722 chandef = ctx->conf.def; 2723 } 2724 mutex_unlock(&local->chanctx_mtx); 2725 2726 ieee80211_dfs_cac_cancel(local); 2727 2728 if (num_chanctx > 1) 2729 /* XXX: multi-channel is not supported yet */ 2730 WARN_ON(1); 2731 else 2732 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 2733 } 2734 2735 void ieee80211_radar_detected(struct ieee80211_hw *hw) 2736 { 2737 struct ieee80211_local *local = hw_to_local(hw); 2738 2739 trace_api_radar_detected(local); 2740 2741 ieee80211_queue_work(hw, &local->radar_detected_work); 2742 } 2743 EXPORT_SYMBOL(ieee80211_radar_detected); 2744 2745 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 2746 { 2747 u32 ret; 2748 int tmp; 2749 2750 switch (c->width) { 2751 case NL80211_CHAN_WIDTH_20: 2752 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2753 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2754 break; 2755 case NL80211_CHAN_WIDTH_40: 2756 c->width = NL80211_CHAN_WIDTH_20; 2757 c->center_freq1 = c->chan->center_freq; 2758 ret = IEEE80211_STA_DISABLE_40MHZ | 2759 IEEE80211_STA_DISABLE_VHT; 2760 break; 2761 case NL80211_CHAN_WIDTH_80: 2762 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 2763 /* n_P40 */ 2764 tmp /= 2; 2765 /* freq_P40 */ 2766 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 2767 c->width = NL80211_CHAN_WIDTH_40; 2768 ret = IEEE80211_STA_DISABLE_VHT; 2769 break; 2770 case NL80211_CHAN_WIDTH_80P80: 2771 c->center_freq2 = 0; 2772 c->width = NL80211_CHAN_WIDTH_80; 2773 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2774 IEEE80211_STA_DISABLE_160MHZ; 2775 break; 2776 case NL80211_CHAN_WIDTH_160: 2777 /* n_P20 */ 2778 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 2779 /* n_P80 */ 2780 tmp /= 4; 2781 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 2782 c->width = NL80211_CHAN_WIDTH_80; 2783 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2784 IEEE80211_STA_DISABLE_160MHZ; 2785 break; 2786 default: 2787 case NL80211_CHAN_WIDTH_20_NOHT: 2788 WARN_ON_ONCE(1); 2789 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2790 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2791 break; 2792 case NL80211_CHAN_WIDTH_5: 2793 case NL80211_CHAN_WIDTH_10: 2794 WARN_ON_ONCE(1); 2795 /* keep c->width */ 2796 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2797 break; 2798 } 2799 2800 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 2801 2802 return ret; 2803 } 2804 2805 /* 2806 * Returns true if smps_mode_new is strictly more restrictive than 2807 * smps_mode_old. 2808 */ 2809 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 2810 enum ieee80211_smps_mode smps_mode_new) 2811 { 2812 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 2813 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 2814 return false; 2815 2816 switch (smps_mode_old) { 2817 case IEEE80211_SMPS_STATIC: 2818 return false; 2819 case IEEE80211_SMPS_DYNAMIC: 2820 return smps_mode_new == IEEE80211_SMPS_STATIC; 2821 case IEEE80211_SMPS_OFF: 2822 return smps_mode_new != IEEE80211_SMPS_OFF; 2823 default: 2824 WARN_ON(1); 2825 } 2826 2827 return false; 2828 } 2829 2830 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 2831 struct cfg80211_csa_settings *csa_settings) 2832 { 2833 struct sk_buff *skb; 2834 struct ieee80211_mgmt *mgmt; 2835 struct ieee80211_local *local = sdata->local; 2836 int freq; 2837 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) + 2838 sizeof(mgmt->u.action.u.chan_switch); 2839 u8 *pos; 2840 2841 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 2842 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 2843 return -EOPNOTSUPP; 2844 2845 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 2846 5 + /* channel switch announcement element */ 2847 3 + /* secondary channel offset element */ 2848 8); /* mesh channel switch parameters element */ 2849 if (!skb) 2850 return -ENOMEM; 2851 2852 skb_reserve(skb, local->tx_headroom); 2853 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len); 2854 memset(mgmt, 0, hdr_len); 2855 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2856 IEEE80211_STYPE_ACTION); 2857 2858 eth_broadcast_addr(mgmt->da); 2859 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2860 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2861 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 2862 } else { 2863 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 2864 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 2865 } 2866 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 2867 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 2868 pos = skb_put(skb, 5); 2869 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 2870 *pos++ = 3; /* IE length */ 2871 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 2872 freq = csa_settings->chandef.chan->center_freq; 2873 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 2874 *pos++ = csa_settings->count; /* count */ 2875 2876 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 2877 enum nl80211_channel_type ch_type; 2878 2879 skb_put(skb, 3); 2880 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 2881 *pos++ = 1; /* IE length */ 2882 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 2883 if (ch_type == NL80211_CHAN_HT40PLUS) 2884 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2885 else 2886 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2887 } 2888 2889 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2890 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 2891 2892 skb_put(skb, 8); 2893 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 2894 *pos++ = 6; /* IE length */ 2895 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 2896 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 2897 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 2898 *pos++ |= csa_settings->block_tx ? 2899 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 2900 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 2901 pos += 2; 2902 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 2903 pos += 2; 2904 } 2905 2906 ieee80211_tx_skb(sdata, skb); 2907 return 0; 2908 } 2909 2910 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 2911 { 2912 return !(cs == NULL || cs->cipher == 0 || 2913 cs->hdr_len < cs->pn_len + cs->pn_off || 2914 cs->hdr_len <= cs->key_idx_off || 2915 cs->key_idx_shift > 7 || 2916 cs->key_idx_mask == 0); 2917 } 2918 2919 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 2920 { 2921 int i; 2922 2923 /* Ensure we have enough iftype bitmap space for all iftype values */ 2924 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 2925 2926 for (i = 0; i < n; i++) 2927 if (!ieee80211_cs_valid(&cs[i])) 2928 return false; 2929 2930 return true; 2931 } 2932 2933 const struct ieee80211_cipher_scheme * 2934 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 2935 enum nl80211_iftype iftype) 2936 { 2937 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 2938 int n = local->hw.n_cipher_schemes; 2939 int i; 2940 const struct ieee80211_cipher_scheme *cs = NULL; 2941 2942 for (i = 0; i < n; i++) { 2943 if (l[i].cipher == cipher) { 2944 cs = &l[i]; 2945 break; 2946 } 2947 } 2948 2949 if (!cs || !(cs->iftype & BIT(iftype))) 2950 return NULL; 2951 2952 return cs; 2953 } 2954 2955 int ieee80211_cs_headroom(struct ieee80211_local *local, 2956 struct cfg80211_crypto_settings *crypto, 2957 enum nl80211_iftype iftype) 2958 { 2959 const struct ieee80211_cipher_scheme *cs; 2960 int headroom = IEEE80211_ENCRYPT_HEADROOM; 2961 int i; 2962 2963 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 2964 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 2965 iftype); 2966 2967 if (cs && headroom < cs->hdr_len) 2968 headroom = cs->hdr_len; 2969 } 2970 2971 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 2972 if (cs && headroom < cs->hdr_len) 2973 headroom = cs->hdr_len; 2974 2975 return headroom; 2976 } 2977 2978 static bool 2979 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 2980 { 2981 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 2982 int skip; 2983 2984 if (end > 0) 2985 return false; 2986 2987 /* End time is in the past, check for repetitions */ 2988 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 2989 if (data->count[i] < 255) { 2990 if (data->count[i] <= skip) { 2991 data->count[i] = 0; 2992 return false; 2993 } 2994 2995 data->count[i] -= skip; 2996 } 2997 2998 data->desc[i].start += skip * data->desc[i].interval; 2999 3000 return true; 3001 } 3002 3003 static bool 3004 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3005 s32 *offset) 3006 { 3007 bool ret = false; 3008 int i; 3009 3010 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3011 s32 cur; 3012 3013 if (!data->count[i]) 3014 continue; 3015 3016 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3017 ret = true; 3018 3019 cur = data->desc[i].start - tsf; 3020 if (cur > *offset) 3021 continue; 3022 3023 cur = data->desc[i].start + data->desc[i].duration - tsf; 3024 if (cur > *offset) 3025 *offset = cur; 3026 } 3027 3028 return ret; 3029 } 3030 3031 static u32 3032 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3033 { 3034 s32 offset = 0; 3035 int tries = 0; 3036 /* 3037 * arbitrary limit, used to avoid infinite loops when combined NoA 3038 * descriptors cover the full time period. 3039 */ 3040 int max_tries = 5; 3041 3042 ieee80211_extend_absent_time(data, tsf, &offset); 3043 do { 3044 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3045 break; 3046 3047 tries++; 3048 } while (tries < max_tries); 3049 3050 return offset; 3051 } 3052 3053 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3054 { 3055 u32 next_offset = BIT(31) - 1; 3056 int i; 3057 3058 data->absent = 0; 3059 data->has_next_tsf = false; 3060 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3061 s32 start; 3062 3063 if (!data->count[i]) 3064 continue; 3065 3066 ieee80211_extend_noa_desc(data, tsf, i); 3067 start = data->desc[i].start - tsf; 3068 if (start <= 0) 3069 data->absent |= BIT(i); 3070 3071 if (next_offset > start) 3072 next_offset = start; 3073 3074 data->has_next_tsf = true; 3075 } 3076 3077 if (data->absent) 3078 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3079 3080 data->next_tsf = tsf + next_offset; 3081 } 3082 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3083 3084 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3085 struct ieee80211_noa_data *data, u32 tsf) 3086 { 3087 int ret = 0; 3088 int i; 3089 3090 memset(data, 0, sizeof(*data)); 3091 3092 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3093 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3094 3095 if (!desc->count || !desc->duration) 3096 continue; 3097 3098 data->count[i] = desc->count; 3099 data->desc[i].start = le32_to_cpu(desc->start_time); 3100 data->desc[i].duration = le32_to_cpu(desc->duration); 3101 data->desc[i].interval = le32_to_cpu(desc->interval); 3102 3103 if (data->count[i] > 1 && 3104 data->desc[i].interval < data->desc[i].duration) 3105 continue; 3106 3107 ieee80211_extend_noa_desc(data, tsf, i); 3108 ret++; 3109 } 3110 3111 if (ret) 3112 ieee80211_update_p2p_noa(data, tsf); 3113 3114 return ret; 3115 } 3116 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3117 3118 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3119 struct ieee80211_sub_if_data *sdata) 3120 { 3121 u64 tsf = drv_get_tsf(local, sdata); 3122 u64 dtim_count = 0; 3123 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3124 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3125 struct ps_data *ps; 3126 u8 bcns_from_dtim; 3127 3128 if (tsf == -1ULL || !beacon_int || !dtim_period) 3129 return; 3130 3131 if (sdata->vif.type == NL80211_IFTYPE_AP || 3132 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3133 if (!sdata->bss) 3134 return; 3135 3136 ps = &sdata->bss->ps; 3137 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3138 ps = &sdata->u.mesh.ps; 3139 } else { 3140 return; 3141 } 3142 3143 /* 3144 * actually finds last dtim_count, mac80211 will update in 3145 * __beacon_add_tim(). 3146 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3147 */ 3148 do_div(tsf, beacon_int); 3149 bcns_from_dtim = do_div(tsf, dtim_period); 3150 /* just had a DTIM */ 3151 if (!bcns_from_dtim) 3152 dtim_count = 0; 3153 else 3154 dtim_count = dtim_period - bcns_from_dtim; 3155 3156 ps->dtim_count = dtim_count; 3157 } 3158 3159 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3160 struct ieee80211_chanctx *ctx) 3161 { 3162 struct ieee80211_sub_if_data *sdata; 3163 u8 radar_detect = 0; 3164 3165 lockdep_assert_held(&local->chanctx_mtx); 3166 3167 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3168 return 0; 3169 3170 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3171 if (sdata->reserved_radar_required) 3172 radar_detect |= BIT(sdata->reserved_chandef.width); 3173 3174 /* 3175 * An in-place reservation context should not have any assigned vifs 3176 * until it replaces the other context. 3177 */ 3178 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3179 !list_empty(&ctx->assigned_vifs)); 3180 3181 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3182 if (sdata->radar_required) 3183 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3184 3185 return radar_detect; 3186 } 3187 3188 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3189 const struct cfg80211_chan_def *chandef, 3190 enum ieee80211_chanctx_mode chanmode, 3191 u8 radar_detect) 3192 { 3193 struct ieee80211_local *local = sdata->local; 3194 struct ieee80211_sub_if_data *sdata_iter; 3195 enum nl80211_iftype iftype = sdata->wdev.iftype; 3196 int num[NUM_NL80211_IFTYPES]; 3197 struct ieee80211_chanctx *ctx; 3198 int num_different_channels = 0; 3199 int total = 1; 3200 3201 lockdep_assert_held(&local->chanctx_mtx); 3202 3203 if (WARN_ON(hweight32(radar_detect) > 1)) 3204 return -EINVAL; 3205 3206 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3207 !chandef->chan)) 3208 return -EINVAL; 3209 3210 if (chandef) 3211 num_different_channels = 1; 3212 3213 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3214 return -EINVAL; 3215 3216 /* Always allow software iftypes */ 3217 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3218 if (radar_detect) 3219 return -EINVAL; 3220 return 0; 3221 } 3222 3223 memset(num, 0, sizeof(num)); 3224 3225 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3226 num[iftype] = 1; 3227 3228 list_for_each_entry(ctx, &local->chanctx_list, list) { 3229 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3230 continue; 3231 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3232 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3233 num_different_channels++; 3234 continue; 3235 } 3236 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3237 cfg80211_chandef_compatible(chandef, 3238 &ctx->conf.def)) 3239 continue; 3240 num_different_channels++; 3241 } 3242 3243 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3244 struct wireless_dev *wdev_iter; 3245 3246 wdev_iter = &sdata_iter->wdev; 3247 3248 if (sdata_iter == sdata || 3249 !ieee80211_sdata_running(sdata_iter) || 3250 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3251 continue; 3252 3253 num[wdev_iter->iftype]++; 3254 total++; 3255 } 3256 3257 if (total == 1 && !radar_detect) 3258 return 0; 3259 3260 return cfg80211_check_combinations(local->hw.wiphy, 3261 num_different_channels, 3262 radar_detect, num); 3263 } 3264 3265 static void 3266 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3267 void *data) 3268 { 3269 u32 *max_num_different_channels = data; 3270 3271 *max_num_different_channels = max(*max_num_different_channels, 3272 c->num_different_channels); 3273 } 3274 3275 int ieee80211_max_num_channels(struct ieee80211_local *local) 3276 { 3277 struct ieee80211_sub_if_data *sdata; 3278 int num[NUM_NL80211_IFTYPES] = {}; 3279 struct ieee80211_chanctx *ctx; 3280 int num_different_channels = 0; 3281 u8 radar_detect = 0; 3282 u32 max_num_different_channels = 1; 3283 int err; 3284 3285 lockdep_assert_held(&local->chanctx_mtx); 3286 3287 list_for_each_entry(ctx, &local->chanctx_list, list) { 3288 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3289 continue; 3290 3291 num_different_channels++; 3292 3293 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3294 } 3295 3296 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3297 num[sdata->wdev.iftype]++; 3298 3299 err = cfg80211_iter_combinations(local->hw.wiphy, 3300 num_different_channels, radar_detect, 3301 num, ieee80211_iter_max_chans, 3302 &max_num_different_channels); 3303 if (err < 0) 3304 return err; 3305 3306 return max_num_different_channels; 3307 } 3308 3309 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3310 { 3311 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3312 *buf++ = 7; /* len */ 3313 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3314 *buf++ = 0x50; 3315 *buf++ = 0xf2; 3316 *buf++ = 2; /* WME */ 3317 *buf++ = 0; /* WME info */ 3318 *buf++ = 1; /* WME ver */ 3319 *buf++ = qosinfo; /* U-APSD no in use */ 3320 3321 return buf; 3322 } 3323 3324 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata, 3325 struct sta_info *sta, 3326 struct txq_info *txqi, int tid) 3327 { 3328 skb_queue_head_init(&txqi->queue); 3329 txqi->txq.vif = &sdata->vif; 3330 3331 if (sta) { 3332 txqi->txq.sta = &sta->sta; 3333 sta->sta.txq[tid] = &txqi->txq; 3334 txqi->txq.ac = ieee802_1d_to_ac[tid & 7]; 3335 } else { 3336 sdata->vif.txq = &txqi->txq; 3337 txqi->txq.ac = IEEE80211_AC_BE; 3338 } 3339 } 3340