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 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 * utilities for mac80211 12 */ 13 14 #include <net/mac80211.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/bitmap.h> 22 #include <linux/crc32.h> 23 #include <net/net_namespace.h> 24 #include <net/cfg80211.h> 25 #include <net/rtnetlink.h> 26 27 #include "ieee80211_i.h" 28 #include "driver-ops.h" 29 #include "rate.h" 30 #include "mesh.h" 31 #include "wme.h" 32 #include "led.h" 33 #include "wep.h" 34 35 /* privid for wiphys to determine whether they belong to us or not */ 36 void *mac80211_wiphy_privid = &mac80211_wiphy_privid; 37 38 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 39 { 40 struct ieee80211_local *local; 41 BUG_ON(!wiphy); 42 43 local = wiphy_priv(wiphy); 44 return &local->hw; 45 } 46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 47 48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, 49 enum nl80211_iftype type) 50 { 51 __le16 fc = hdr->frame_control; 52 53 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ 54 if (len < 16) 55 return NULL; 56 57 if (ieee80211_is_data(fc)) { 58 if (len < 24) /* drop incorrect hdr len (data) */ 59 return NULL; 60 61 if (ieee80211_has_a4(fc)) 62 return NULL; 63 if (ieee80211_has_tods(fc)) 64 return hdr->addr1; 65 if (ieee80211_has_fromds(fc)) 66 return hdr->addr2; 67 68 return hdr->addr3; 69 } 70 71 if (ieee80211_is_mgmt(fc)) { 72 if (len < 24) /* drop incorrect hdr len (mgmt) */ 73 return NULL; 74 return hdr->addr3; 75 } 76 77 if (ieee80211_is_ctl(fc)) { 78 if(ieee80211_is_pspoll(fc)) 79 return hdr->addr1; 80 81 if (ieee80211_is_back_req(fc)) { 82 switch (type) { 83 case NL80211_IFTYPE_STATION: 84 return hdr->addr2; 85 case NL80211_IFTYPE_AP: 86 case NL80211_IFTYPE_AP_VLAN: 87 return hdr->addr1; 88 default: 89 break; /* fall through to the return */ 90 } 91 } 92 } 93 94 return NULL; 95 } 96 97 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 98 { 99 struct sk_buff *skb = tx->skb; 100 struct ieee80211_hdr *hdr; 101 102 do { 103 hdr = (struct ieee80211_hdr *) skb->data; 104 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 105 } while ((skb = skb->next)); 106 } 107 108 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, 109 int rate, int erp, int short_preamble) 110 { 111 int dur; 112 113 /* calculate duration (in microseconds, rounded up to next higher 114 * integer if it includes a fractional microsecond) to send frame of 115 * len bytes (does not include FCS) at the given rate. Duration will 116 * also include SIFS. 117 * 118 * rate is in 100 kbps, so divident is multiplied by 10 in the 119 * DIV_ROUND_UP() operations. 120 */ 121 122 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { 123 /* 124 * OFDM: 125 * 126 * N_DBPS = DATARATE x 4 127 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 128 * (16 = SIGNAL time, 6 = tail bits) 129 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 130 * 131 * T_SYM = 4 usec 132 * 802.11a - 17.5.2: aSIFSTime = 16 usec 133 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 134 * signal ext = 6 usec 135 */ 136 dur = 16; /* SIFS + signal ext */ 137 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ 138 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ 139 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 140 4 * rate); /* T_SYM x N_SYM */ 141 } else { 142 /* 143 * 802.11b or 802.11g with 802.11b compatibility: 144 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 145 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 146 * 147 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 148 * aSIFSTime = 10 usec 149 * aPreambleLength = 144 usec or 72 usec with short preamble 150 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 151 */ 152 dur = 10; /* aSIFSTime = 10 usec */ 153 dur += short_preamble ? (72 + 24) : (144 + 48); 154 155 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 156 } 157 158 return dur; 159 } 160 161 /* Exported duration function for driver use */ 162 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 163 struct ieee80211_vif *vif, 164 size_t frame_len, 165 struct ieee80211_rate *rate) 166 { 167 struct ieee80211_local *local = hw_to_local(hw); 168 struct ieee80211_sub_if_data *sdata; 169 u16 dur; 170 int erp; 171 bool short_preamble = false; 172 173 erp = 0; 174 if (vif) { 175 sdata = vif_to_sdata(vif); 176 short_preamble = sdata->vif.bss_conf.use_short_preamble; 177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 178 erp = rate->flags & IEEE80211_RATE_ERP_G; 179 } 180 181 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, 182 short_preamble); 183 184 return cpu_to_le16(dur); 185 } 186 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 187 188 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 189 struct ieee80211_vif *vif, size_t frame_len, 190 const struct ieee80211_tx_info *frame_txctl) 191 { 192 struct ieee80211_local *local = hw_to_local(hw); 193 struct ieee80211_rate *rate; 194 struct ieee80211_sub_if_data *sdata; 195 bool short_preamble; 196 int erp; 197 u16 dur; 198 struct ieee80211_supported_band *sband; 199 200 sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; 201 202 short_preamble = false; 203 204 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 205 206 erp = 0; 207 if (vif) { 208 sdata = vif_to_sdata(vif); 209 short_preamble = sdata->vif.bss_conf.use_short_preamble; 210 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 211 erp = rate->flags & IEEE80211_RATE_ERP_G; 212 } 213 214 /* CTS duration */ 215 dur = ieee80211_frame_duration(local, 10, rate->bitrate, 216 erp, short_preamble); 217 /* Data frame duration */ 218 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, 219 erp, short_preamble); 220 /* ACK duration */ 221 dur += ieee80211_frame_duration(local, 10, rate->bitrate, 222 erp, short_preamble); 223 224 return cpu_to_le16(dur); 225 } 226 EXPORT_SYMBOL(ieee80211_rts_duration); 227 228 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 229 struct ieee80211_vif *vif, 230 size_t frame_len, 231 const struct ieee80211_tx_info *frame_txctl) 232 { 233 struct ieee80211_local *local = hw_to_local(hw); 234 struct ieee80211_rate *rate; 235 struct ieee80211_sub_if_data *sdata; 236 bool short_preamble; 237 int erp; 238 u16 dur; 239 struct ieee80211_supported_band *sband; 240 241 sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; 242 243 short_preamble = false; 244 245 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 246 erp = 0; 247 if (vif) { 248 sdata = vif_to_sdata(vif); 249 short_preamble = sdata->vif.bss_conf.use_short_preamble; 250 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 251 erp = rate->flags & IEEE80211_RATE_ERP_G; 252 } 253 254 /* Data frame duration */ 255 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, 256 erp, short_preamble); 257 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 258 /* ACK duration */ 259 dur += ieee80211_frame_duration(local, 10, rate->bitrate, 260 erp, short_preamble); 261 } 262 263 return cpu_to_le16(dur); 264 } 265 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 266 267 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 268 enum queue_stop_reason reason) 269 { 270 struct ieee80211_local *local = hw_to_local(hw); 271 struct ieee80211_sub_if_data *sdata; 272 273 trace_wake_queue(local, queue, reason); 274 275 if (WARN_ON(queue >= hw->queues)) 276 return; 277 278 __clear_bit(reason, &local->queue_stop_reasons[queue]); 279 280 if (local->queue_stop_reasons[queue] != 0) 281 /* someone still has this queue stopped */ 282 return; 283 284 if (skb_queue_empty(&local->pending[queue])) { 285 rcu_read_lock(); 286 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 287 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) 288 continue; 289 netif_wake_subqueue(sdata->dev, queue); 290 } 291 rcu_read_unlock(); 292 } else 293 tasklet_schedule(&local->tx_pending_tasklet); 294 } 295 296 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 297 enum queue_stop_reason reason) 298 { 299 struct ieee80211_local *local = hw_to_local(hw); 300 unsigned long flags; 301 302 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 303 __ieee80211_wake_queue(hw, queue, reason); 304 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 305 } 306 307 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 308 { 309 ieee80211_wake_queue_by_reason(hw, queue, 310 IEEE80211_QUEUE_STOP_REASON_DRIVER); 311 } 312 EXPORT_SYMBOL(ieee80211_wake_queue); 313 314 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 315 enum queue_stop_reason reason) 316 { 317 struct ieee80211_local *local = hw_to_local(hw); 318 struct ieee80211_sub_if_data *sdata; 319 320 trace_stop_queue(local, queue, reason); 321 322 if (WARN_ON(queue >= hw->queues)) 323 return; 324 325 __set_bit(reason, &local->queue_stop_reasons[queue]); 326 327 rcu_read_lock(); 328 list_for_each_entry_rcu(sdata, &local->interfaces, list) 329 netif_stop_subqueue(sdata->dev, queue); 330 rcu_read_unlock(); 331 } 332 333 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 334 enum queue_stop_reason reason) 335 { 336 struct ieee80211_local *local = hw_to_local(hw); 337 unsigned long flags; 338 339 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 340 __ieee80211_stop_queue(hw, queue, reason); 341 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 342 } 343 344 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 345 { 346 ieee80211_stop_queue_by_reason(hw, queue, 347 IEEE80211_QUEUE_STOP_REASON_DRIVER); 348 } 349 EXPORT_SYMBOL(ieee80211_stop_queue); 350 351 void ieee80211_add_pending_skb(struct ieee80211_local *local, 352 struct sk_buff *skb) 353 { 354 struct ieee80211_hw *hw = &local->hw; 355 unsigned long flags; 356 int queue = skb_get_queue_mapping(skb); 357 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 358 359 if (WARN_ON(!info->control.vif)) { 360 kfree_skb(skb); 361 return; 362 } 363 364 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 365 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); 366 __skb_queue_tail(&local->pending[queue], skb); 367 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); 368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 369 } 370 371 int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, 372 struct sk_buff_head *skbs, 373 void (*fn)(void *data), void *data) 374 { 375 struct ieee80211_hw *hw = &local->hw; 376 struct sk_buff *skb; 377 unsigned long flags; 378 int queue, ret = 0, i; 379 380 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 381 for (i = 0; i < hw->queues; i++) 382 __ieee80211_stop_queue(hw, i, 383 IEEE80211_QUEUE_STOP_REASON_SKB_ADD); 384 385 while ((skb = skb_dequeue(skbs))) { 386 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 387 388 if (WARN_ON(!info->control.vif)) { 389 kfree_skb(skb); 390 continue; 391 } 392 393 ret++; 394 queue = skb_get_queue_mapping(skb); 395 __skb_queue_tail(&local->pending[queue], skb); 396 } 397 398 if (fn) 399 fn(data); 400 401 for (i = 0; i < hw->queues; i++) 402 __ieee80211_wake_queue(hw, i, 403 IEEE80211_QUEUE_STOP_REASON_SKB_ADD); 404 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 405 406 return ret; 407 } 408 409 int ieee80211_add_pending_skbs(struct ieee80211_local *local, 410 struct sk_buff_head *skbs) 411 { 412 return ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL); 413 } 414 415 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 416 enum queue_stop_reason reason) 417 { 418 struct ieee80211_local *local = hw_to_local(hw); 419 unsigned long flags; 420 int i; 421 422 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 423 424 for (i = 0; i < hw->queues; i++) 425 __ieee80211_stop_queue(hw, i, reason); 426 427 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 428 } 429 430 void ieee80211_stop_queues(struct ieee80211_hw *hw) 431 { 432 ieee80211_stop_queues_by_reason(hw, 433 IEEE80211_QUEUE_STOP_REASON_DRIVER); 434 } 435 EXPORT_SYMBOL(ieee80211_stop_queues); 436 437 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 438 { 439 struct ieee80211_local *local = hw_to_local(hw); 440 unsigned long flags; 441 int ret; 442 443 if (WARN_ON(queue >= hw->queues)) 444 return true; 445 446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 447 ret = !!local->queue_stop_reasons[queue]; 448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 449 return ret; 450 } 451 EXPORT_SYMBOL(ieee80211_queue_stopped); 452 453 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 454 enum queue_stop_reason reason) 455 { 456 struct ieee80211_local *local = hw_to_local(hw); 457 unsigned long flags; 458 int i; 459 460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 461 462 for (i = 0; i < hw->queues; i++) 463 __ieee80211_wake_queue(hw, i, reason); 464 465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 466 } 467 468 void ieee80211_wake_queues(struct ieee80211_hw *hw) 469 { 470 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); 471 } 472 EXPORT_SYMBOL(ieee80211_wake_queues); 473 474 void ieee80211_iterate_active_interfaces( 475 struct ieee80211_hw *hw, 476 void (*iterator)(void *data, u8 *mac, 477 struct ieee80211_vif *vif), 478 void *data) 479 { 480 struct ieee80211_local *local = hw_to_local(hw); 481 struct ieee80211_sub_if_data *sdata; 482 483 mutex_lock(&local->iflist_mtx); 484 485 list_for_each_entry(sdata, &local->interfaces, list) { 486 switch (sdata->vif.type) { 487 case NL80211_IFTYPE_MONITOR: 488 case NL80211_IFTYPE_AP_VLAN: 489 continue; 490 default: 491 break; 492 } 493 if (ieee80211_sdata_running(sdata)) 494 iterator(data, sdata->vif.addr, 495 &sdata->vif); 496 } 497 498 mutex_unlock(&local->iflist_mtx); 499 } 500 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); 501 502 void ieee80211_iterate_active_interfaces_atomic( 503 struct ieee80211_hw *hw, 504 void (*iterator)(void *data, u8 *mac, 505 struct ieee80211_vif *vif), 506 void *data) 507 { 508 struct ieee80211_local *local = hw_to_local(hw); 509 struct ieee80211_sub_if_data *sdata; 510 511 rcu_read_lock(); 512 513 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 514 switch (sdata->vif.type) { 515 case NL80211_IFTYPE_MONITOR: 516 case NL80211_IFTYPE_AP_VLAN: 517 continue; 518 default: 519 break; 520 } 521 if (ieee80211_sdata_running(sdata)) 522 iterator(data, sdata->vif.addr, 523 &sdata->vif); 524 } 525 526 rcu_read_unlock(); 527 } 528 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 529 530 /* 531 * Nothing should have been stuffed into the workqueue during 532 * the suspend->resume cycle. If this WARN is seen then there 533 * is a bug with either the driver suspend or something in 534 * mac80211 stuffing into the workqueue which we haven't yet 535 * cleared during mac80211's suspend cycle. 536 */ 537 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 538 { 539 if (WARN(local->suspended && !local->resuming, 540 "queueing ieee80211 work while going to suspend\n")) 541 return false; 542 543 return true; 544 } 545 546 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 547 { 548 struct ieee80211_local *local = hw_to_local(hw); 549 550 if (!ieee80211_can_queue_work(local)) 551 return; 552 553 queue_work(local->workqueue, work); 554 } 555 EXPORT_SYMBOL(ieee80211_queue_work); 556 557 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 558 struct delayed_work *dwork, 559 unsigned long delay) 560 { 561 struct ieee80211_local *local = hw_to_local(hw); 562 563 if (!ieee80211_can_queue_work(local)) 564 return; 565 566 queue_delayed_work(local->workqueue, dwork, delay); 567 } 568 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 569 570 void ieee802_11_parse_elems(u8 *start, size_t len, 571 struct ieee802_11_elems *elems) 572 { 573 ieee802_11_parse_elems_crc(start, len, elems, 0, 0); 574 } 575 576 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, 577 struct ieee802_11_elems *elems, 578 u64 filter, u32 crc) 579 { 580 size_t left = len; 581 u8 *pos = start; 582 bool calc_crc = filter != 0; 583 584 memset(elems, 0, sizeof(*elems)); 585 elems->ie_start = start; 586 elems->total_len = len; 587 588 while (left >= 2) { 589 u8 id, elen; 590 591 id = *pos++; 592 elen = *pos++; 593 left -= 2; 594 595 if (elen > left) 596 break; 597 598 if (calc_crc && id < 64 && (filter & (1ULL << id))) 599 crc = crc32_be(crc, pos - 2, elen + 2); 600 601 switch (id) { 602 case WLAN_EID_SSID: 603 elems->ssid = pos; 604 elems->ssid_len = elen; 605 break; 606 case WLAN_EID_SUPP_RATES: 607 elems->supp_rates = pos; 608 elems->supp_rates_len = elen; 609 break; 610 case WLAN_EID_FH_PARAMS: 611 elems->fh_params = pos; 612 elems->fh_params_len = elen; 613 break; 614 case WLAN_EID_DS_PARAMS: 615 elems->ds_params = pos; 616 elems->ds_params_len = elen; 617 break; 618 case WLAN_EID_CF_PARAMS: 619 elems->cf_params = pos; 620 elems->cf_params_len = elen; 621 break; 622 case WLAN_EID_TIM: 623 if (elen >= sizeof(struct ieee80211_tim_ie)) { 624 elems->tim = (void *)pos; 625 elems->tim_len = elen; 626 } 627 break; 628 case WLAN_EID_IBSS_PARAMS: 629 elems->ibss_params = pos; 630 elems->ibss_params_len = elen; 631 break; 632 case WLAN_EID_CHALLENGE: 633 elems->challenge = pos; 634 elems->challenge_len = elen; 635 break; 636 case WLAN_EID_VENDOR_SPECIFIC: 637 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 638 pos[2] == 0xf2) { 639 /* Microsoft OUI (00:50:F2) */ 640 641 if (calc_crc) 642 crc = crc32_be(crc, pos - 2, elen + 2); 643 644 if (pos[3] == 1) { 645 /* OUI Type 1 - WPA IE */ 646 elems->wpa = pos; 647 elems->wpa_len = elen; 648 } else if (elen >= 5 && pos[3] == 2) { 649 /* OUI Type 2 - WMM IE */ 650 if (pos[4] == 0) { 651 elems->wmm_info = pos; 652 elems->wmm_info_len = elen; 653 } else if (pos[4] == 1) { 654 elems->wmm_param = pos; 655 elems->wmm_param_len = elen; 656 } 657 } 658 } 659 break; 660 case WLAN_EID_RSN: 661 elems->rsn = pos; 662 elems->rsn_len = elen; 663 break; 664 case WLAN_EID_ERP_INFO: 665 elems->erp_info = pos; 666 elems->erp_info_len = elen; 667 break; 668 case WLAN_EID_EXT_SUPP_RATES: 669 elems->ext_supp_rates = pos; 670 elems->ext_supp_rates_len = elen; 671 break; 672 case WLAN_EID_HT_CAPABILITY: 673 if (elen >= sizeof(struct ieee80211_ht_cap)) 674 elems->ht_cap_elem = (void *)pos; 675 break; 676 case WLAN_EID_HT_INFORMATION: 677 if (elen >= sizeof(struct ieee80211_ht_info)) 678 elems->ht_info_elem = (void *)pos; 679 break; 680 case WLAN_EID_MESH_ID: 681 elems->mesh_id = pos; 682 elems->mesh_id_len = elen; 683 break; 684 case WLAN_EID_MESH_CONFIG: 685 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 686 elems->mesh_config = (void *)pos; 687 break; 688 case WLAN_EID_PEER_LINK: 689 elems->peer_link = pos; 690 elems->peer_link_len = elen; 691 break; 692 case WLAN_EID_PREQ: 693 elems->preq = pos; 694 elems->preq_len = elen; 695 break; 696 case WLAN_EID_PREP: 697 elems->prep = pos; 698 elems->prep_len = elen; 699 break; 700 case WLAN_EID_PERR: 701 elems->perr = pos; 702 elems->perr_len = elen; 703 break; 704 case WLAN_EID_RANN: 705 if (elen >= sizeof(struct ieee80211_rann_ie)) 706 elems->rann = (void *)pos; 707 break; 708 case WLAN_EID_CHANNEL_SWITCH: 709 elems->ch_switch_elem = pos; 710 elems->ch_switch_elem_len = elen; 711 break; 712 case WLAN_EID_QUIET: 713 if (!elems->quiet_elem) { 714 elems->quiet_elem = pos; 715 elems->quiet_elem_len = elen; 716 } 717 elems->num_of_quiet_elem++; 718 break; 719 case WLAN_EID_COUNTRY: 720 elems->country_elem = pos; 721 elems->country_elem_len = elen; 722 break; 723 case WLAN_EID_PWR_CONSTRAINT: 724 elems->pwr_constr_elem = pos; 725 elems->pwr_constr_elem_len = elen; 726 break; 727 case WLAN_EID_TIMEOUT_INTERVAL: 728 elems->timeout_int = pos; 729 elems->timeout_int_len = elen; 730 break; 731 default: 732 break; 733 } 734 735 left -= elen; 736 pos += elen; 737 } 738 739 return crc; 740 } 741 742 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) 743 { 744 struct ieee80211_local *local = sdata->local; 745 struct ieee80211_tx_queue_params qparam; 746 int queue; 747 bool use_11b; 748 int aCWmin, aCWmax; 749 750 if (!local->ops->conf_tx) 751 return; 752 753 memset(&qparam, 0, sizeof(qparam)); 754 755 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && 756 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 757 758 for (queue = 0; queue < local_to_hw(local)->queues; queue++) { 759 /* Set defaults according to 802.11-2007 Table 7-37 */ 760 aCWmax = 1023; 761 if (use_11b) 762 aCWmin = 31; 763 else 764 aCWmin = 15; 765 766 switch (queue) { 767 case 3: /* AC_BK */ 768 qparam.cw_max = aCWmax; 769 qparam.cw_min = aCWmin; 770 qparam.txop = 0; 771 qparam.aifs = 7; 772 break; 773 default: /* never happens but let's not leave undefined */ 774 case 2: /* AC_BE */ 775 qparam.cw_max = aCWmax; 776 qparam.cw_min = aCWmin; 777 qparam.txop = 0; 778 qparam.aifs = 3; 779 break; 780 case 1: /* AC_VI */ 781 qparam.cw_max = aCWmin; 782 qparam.cw_min = (aCWmin + 1) / 2 - 1; 783 if (use_11b) 784 qparam.txop = 6016/32; 785 else 786 qparam.txop = 3008/32; 787 qparam.aifs = 2; 788 break; 789 case 0: /* AC_VO */ 790 qparam.cw_max = (aCWmin + 1) / 2 - 1; 791 qparam.cw_min = (aCWmin + 1) / 4 - 1; 792 if (use_11b) 793 qparam.txop = 3264/32; 794 else 795 qparam.txop = 1504/32; 796 qparam.aifs = 2; 797 break; 798 } 799 800 qparam.uapsd = false; 801 802 local->tx_conf[queue] = qparam; 803 drv_conf_tx(local, queue, &qparam); 804 } 805 806 /* after reinitialize QoS TX queues setting to default, 807 * disable QoS at all */ 808 809 if (sdata->vif.type != NL80211_IFTYPE_MONITOR) { 810 sdata->vif.bss_conf.qos = 811 sdata->vif.type != NL80211_IFTYPE_STATION; 812 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 813 } 814 } 815 816 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, 817 const size_t supp_rates_len, 818 const u8 *supp_rates) 819 { 820 struct ieee80211_local *local = sdata->local; 821 int i, have_higher_than_11mbit = 0; 822 823 /* cf. IEEE 802.11 9.2.12 */ 824 for (i = 0; i < supp_rates_len; i++) 825 if ((supp_rates[i] & 0x7f) * 5 > 110) 826 have_higher_than_11mbit = 1; 827 828 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && 829 have_higher_than_11mbit) 830 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 831 else 832 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 833 834 ieee80211_set_wmm_default(sdata); 835 } 836 837 u32 ieee80211_mandatory_rates(struct ieee80211_local *local, 838 enum ieee80211_band band) 839 { 840 struct ieee80211_supported_band *sband; 841 struct ieee80211_rate *bitrates; 842 u32 mandatory_rates; 843 enum ieee80211_rate_flags mandatory_flag; 844 int i; 845 846 sband = local->hw.wiphy->bands[band]; 847 if (!sband) { 848 WARN_ON(1); 849 sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; 850 } 851 852 if (band == IEEE80211_BAND_2GHZ) 853 mandatory_flag = IEEE80211_RATE_MANDATORY_B; 854 else 855 mandatory_flag = IEEE80211_RATE_MANDATORY_A; 856 857 bitrates = sband->bitrates; 858 mandatory_rates = 0; 859 for (i = 0; i < sband->n_bitrates; i++) 860 if (bitrates[i].flags & mandatory_flag) 861 mandatory_rates |= BIT(i); 862 return mandatory_rates; 863 } 864 865 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 866 u16 transaction, u16 auth_alg, 867 u8 *extra, size_t extra_len, const u8 *bssid, 868 const u8 *key, u8 key_len, u8 key_idx) 869 { 870 struct ieee80211_local *local = sdata->local; 871 struct sk_buff *skb; 872 struct ieee80211_mgmt *mgmt; 873 int err; 874 875 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 876 sizeof(*mgmt) + 6 + extra_len); 877 if (!skb) { 878 printk(KERN_DEBUG "%s: failed to allocate buffer for auth " 879 "frame\n", sdata->name); 880 return; 881 } 882 skb_reserve(skb, local->hw.extra_tx_headroom); 883 884 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); 885 memset(mgmt, 0, 24 + 6); 886 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 887 IEEE80211_STYPE_AUTH); 888 memcpy(mgmt->da, bssid, ETH_ALEN); 889 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 890 memcpy(mgmt->bssid, bssid, ETH_ALEN); 891 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 892 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 893 mgmt->u.auth.status_code = cpu_to_le16(0); 894 if (extra) 895 memcpy(skb_put(skb, extra_len), extra, extra_len); 896 897 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 898 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 899 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 900 WARN_ON(err); 901 } 902 903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 904 ieee80211_tx_skb(sdata, skb); 905 } 906 907 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 908 const u8 *ie, size_t ie_len, 909 enum ieee80211_band band, u32 rate_mask, 910 u8 channel) 911 { 912 struct ieee80211_supported_band *sband; 913 u8 *pos; 914 size_t offset = 0, noffset; 915 int supp_rates_len, i; 916 u8 rates[32]; 917 int num_rates; 918 int ext_rates_len; 919 920 sband = local->hw.wiphy->bands[band]; 921 922 pos = buffer; 923 924 num_rates = 0; 925 for (i = 0; i < sband->n_bitrates; i++) { 926 if ((BIT(i) & rate_mask) == 0) 927 continue; /* skip rate */ 928 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); 929 } 930 931 supp_rates_len = min_t(int, num_rates, 8); 932 933 *pos++ = WLAN_EID_SUPP_RATES; 934 *pos++ = supp_rates_len; 935 memcpy(pos, rates, supp_rates_len); 936 pos += supp_rates_len; 937 938 /* insert "request information" if in custom IEs */ 939 if (ie && ie_len) { 940 static const u8 before_extrates[] = { 941 WLAN_EID_SSID, 942 WLAN_EID_SUPP_RATES, 943 WLAN_EID_REQUEST, 944 }; 945 noffset = ieee80211_ie_split(ie, ie_len, 946 before_extrates, 947 ARRAY_SIZE(before_extrates), 948 offset); 949 memcpy(pos, ie + offset, noffset - offset); 950 pos += noffset - offset; 951 offset = noffset; 952 } 953 954 ext_rates_len = num_rates - supp_rates_len; 955 if (ext_rates_len > 0) { 956 *pos++ = WLAN_EID_EXT_SUPP_RATES; 957 *pos++ = ext_rates_len; 958 memcpy(pos, rates + supp_rates_len, ext_rates_len); 959 pos += ext_rates_len; 960 } 961 962 if (channel && sband->band == IEEE80211_BAND_2GHZ) { 963 *pos++ = WLAN_EID_DS_PARAMS; 964 *pos++ = 1; 965 *pos++ = channel; 966 } 967 968 /* insert custom IEs that go before HT */ 969 if (ie && ie_len) { 970 static const u8 before_ht[] = { 971 WLAN_EID_SSID, 972 WLAN_EID_SUPP_RATES, 973 WLAN_EID_REQUEST, 974 WLAN_EID_EXT_SUPP_RATES, 975 WLAN_EID_DS_PARAMS, 976 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 977 }; 978 noffset = ieee80211_ie_split(ie, ie_len, 979 before_ht, ARRAY_SIZE(before_ht), 980 offset); 981 memcpy(pos, ie + offset, noffset - offset); 982 pos += noffset - offset; 983 offset = noffset; 984 } 985 986 if (sband->ht_cap.ht_supported) { 987 u16 cap = sband->ht_cap.cap; 988 __le16 tmp; 989 990 *pos++ = WLAN_EID_HT_CAPABILITY; 991 *pos++ = sizeof(struct ieee80211_ht_cap); 992 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 993 tmp = cpu_to_le16(cap); 994 memcpy(pos, &tmp, sizeof(u16)); 995 pos += sizeof(u16); 996 *pos++ = sband->ht_cap.ampdu_factor | 997 (sband->ht_cap.ampdu_density << 998 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 999 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); 1000 pos += sizeof(sband->ht_cap.mcs); 1001 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */ 1002 } 1003 1004 /* 1005 * If adding more here, adjust code in main.c 1006 * that calculates local->scan_ies_len. 1007 */ 1008 1009 /* add any remaining custom IEs */ 1010 if (ie && ie_len) { 1011 noffset = ie_len; 1012 memcpy(pos, ie + offset, noffset - offset); 1013 pos += noffset - offset; 1014 } 1015 1016 return pos - buffer; 1017 } 1018 1019 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1020 u8 *dst, u32 ratemask, 1021 const u8 *ssid, size_t ssid_len, 1022 const u8 *ie, size_t ie_len, 1023 bool directed) 1024 { 1025 struct ieee80211_local *local = sdata->local; 1026 struct sk_buff *skb; 1027 struct ieee80211_mgmt *mgmt; 1028 size_t buf_len; 1029 u8 *buf; 1030 u8 chan; 1031 1032 /* FIXME: come up with a proper value */ 1033 buf = kmalloc(200 + ie_len, GFP_KERNEL); 1034 if (!buf) { 1035 printk(KERN_DEBUG "%s: failed to allocate temporary IE " 1036 "buffer\n", sdata->name); 1037 return NULL; 1038 } 1039 1040 /* 1041 * Do not send DS Channel parameter for directed probe requests 1042 * in order to maximize the chance that we get a response. Some 1043 * badly-behaved APs don't respond when this parameter is included. 1044 */ 1045 if (directed) 1046 chan = 0; 1047 else 1048 chan = ieee80211_frequency_to_channel( 1049 local->hw.conf.channel->center_freq); 1050 1051 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, 1052 local->hw.conf.channel->band, 1053 ratemask, chan); 1054 1055 skb = ieee80211_probereq_get(&local->hw, &sdata->vif, 1056 ssid, ssid_len, 1057 buf, buf_len); 1058 1059 if (dst) { 1060 mgmt = (struct ieee80211_mgmt *) skb->data; 1061 memcpy(mgmt->da, dst, ETH_ALEN); 1062 memcpy(mgmt->bssid, dst, ETH_ALEN); 1063 } 1064 1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1066 kfree(buf); 1067 1068 return skb; 1069 } 1070 1071 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, 1072 const u8 *ssid, size_t ssid_len, 1073 const u8 *ie, size_t ie_len, 1074 u32 ratemask, bool directed) 1075 { 1076 struct sk_buff *skb; 1077 1078 skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len, 1079 ie, ie_len, directed); 1080 if (skb) 1081 ieee80211_tx_skb(sdata, skb); 1082 } 1083 1084 u32 ieee80211_sta_get_rates(struct ieee80211_local *local, 1085 struct ieee802_11_elems *elems, 1086 enum ieee80211_band band) 1087 { 1088 struct ieee80211_supported_band *sband; 1089 struct ieee80211_rate *bitrates; 1090 size_t num_rates; 1091 u32 supp_rates; 1092 int i, j; 1093 sband = local->hw.wiphy->bands[band]; 1094 1095 if (!sband) { 1096 WARN_ON(1); 1097 sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; 1098 } 1099 1100 bitrates = sband->bitrates; 1101 num_rates = sband->n_bitrates; 1102 supp_rates = 0; 1103 for (i = 0; i < elems->supp_rates_len + 1104 elems->ext_supp_rates_len; i++) { 1105 u8 rate = 0; 1106 int own_rate; 1107 if (i < elems->supp_rates_len) 1108 rate = elems->supp_rates[i]; 1109 else if (elems->ext_supp_rates) 1110 rate = elems->ext_supp_rates 1111 [i - elems->supp_rates_len]; 1112 own_rate = 5 * (rate & 0x7f); 1113 for (j = 0; j < num_rates; j++) 1114 if (bitrates[j].bitrate == own_rate) 1115 supp_rates |= BIT(j); 1116 } 1117 return supp_rates; 1118 } 1119 1120 void ieee80211_stop_device(struct ieee80211_local *local) 1121 { 1122 ieee80211_led_radio(local, false); 1123 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1124 1125 cancel_work_sync(&local->reconfig_filter); 1126 1127 flush_workqueue(local->workqueue); 1128 drv_stop(local); 1129 } 1130 1131 int ieee80211_reconfig(struct ieee80211_local *local) 1132 { 1133 struct ieee80211_hw *hw = &local->hw; 1134 struct ieee80211_sub_if_data *sdata; 1135 struct sta_info *sta; 1136 int res, i; 1137 1138 #ifdef CONFIG_PM 1139 if (local->suspended) 1140 local->resuming = true; 1141 1142 if (local->wowlan) { 1143 local->wowlan = false; 1144 res = drv_resume(local); 1145 if (res < 0) { 1146 local->resuming = false; 1147 return res; 1148 } 1149 if (res == 0) 1150 goto wake_up; 1151 WARN_ON(res > 1); 1152 /* 1153 * res is 1, which means the driver requested 1154 * to go through a regular reset on wakeup. 1155 */ 1156 } 1157 #endif 1158 1159 /* setup fragmentation threshold */ 1160 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1161 1162 /* setup RTS threshold */ 1163 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1164 1165 /* reset coverage class */ 1166 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1167 1168 /* everything else happens only if HW was up & running */ 1169 if (!local->open_count) 1170 goto wake_up; 1171 1172 /* 1173 * Upon resume hardware can sometimes be goofy due to 1174 * various platform / driver / bus issues, so restarting 1175 * the device may at times not work immediately. Propagate 1176 * the error. 1177 */ 1178 res = drv_start(local); 1179 if (res) { 1180 WARN(local->suspended, "Hardware became unavailable " 1181 "upon resume. This could be a software issue " 1182 "prior to suspend or a hardware issue.\n"); 1183 return res; 1184 } 1185 1186 ieee80211_led_radio(local, true); 1187 ieee80211_mod_tpt_led_trig(local, 1188 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1189 1190 /* add interfaces */ 1191 list_for_each_entry(sdata, &local->interfaces, list) { 1192 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1193 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1194 ieee80211_sdata_running(sdata)) 1195 res = drv_add_interface(local, &sdata->vif); 1196 } 1197 1198 /* add STAs back */ 1199 mutex_lock(&local->sta_mtx); 1200 list_for_each_entry(sta, &local->sta_list, list) { 1201 if (sta->uploaded) { 1202 sdata = sta->sdata; 1203 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1204 sdata = container_of(sdata->bss, 1205 struct ieee80211_sub_if_data, 1206 u.ap); 1207 1208 WARN_ON(drv_sta_add(local, sdata, &sta->sta)); 1209 } 1210 } 1211 mutex_unlock(&local->sta_mtx); 1212 1213 /* reconfigure tx conf */ 1214 for (i = 0; i < hw->queues; i++) 1215 drv_conf_tx(local, i, &local->tx_conf[i]); 1216 1217 /* reconfigure hardware */ 1218 ieee80211_hw_config(local, ~0); 1219 1220 ieee80211_configure_filter(local); 1221 1222 /* Finally also reconfigure all the BSS information */ 1223 list_for_each_entry(sdata, &local->interfaces, list) { 1224 u32 changed; 1225 1226 if (!ieee80211_sdata_running(sdata)) 1227 continue; 1228 1229 /* common change flags for all interface types */ 1230 changed = BSS_CHANGED_ERP_CTS_PROT | 1231 BSS_CHANGED_ERP_PREAMBLE | 1232 BSS_CHANGED_ERP_SLOT | 1233 BSS_CHANGED_HT | 1234 BSS_CHANGED_BASIC_RATES | 1235 BSS_CHANGED_BEACON_INT | 1236 BSS_CHANGED_BSSID | 1237 BSS_CHANGED_CQM | 1238 BSS_CHANGED_QOS; 1239 1240 switch (sdata->vif.type) { 1241 case NL80211_IFTYPE_STATION: 1242 changed |= BSS_CHANGED_ASSOC; 1243 mutex_lock(&sdata->u.mgd.mtx); 1244 ieee80211_bss_info_change_notify(sdata, changed); 1245 mutex_unlock(&sdata->u.mgd.mtx); 1246 break; 1247 case NL80211_IFTYPE_ADHOC: 1248 changed |= BSS_CHANGED_IBSS; 1249 /* fall through */ 1250 case NL80211_IFTYPE_AP: 1251 case NL80211_IFTYPE_MESH_POINT: 1252 changed |= BSS_CHANGED_BEACON | 1253 BSS_CHANGED_BEACON_ENABLED; 1254 ieee80211_bss_info_change_notify(sdata, changed); 1255 break; 1256 case NL80211_IFTYPE_WDS: 1257 break; 1258 case NL80211_IFTYPE_AP_VLAN: 1259 case NL80211_IFTYPE_MONITOR: 1260 /* ignore virtual */ 1261 break; 1262 case NL80211_IFTYPE_UNSPECIFIED: 1263 case NUM_NL80211_IFTYPES: 1264 case NL80211_IFTYPE_P2P_CLIENT: 1265 case NL80211_IFTYPE_P2P_GO: 1266 WARN_ON(1); 1267 break; 1268 } 1269 } 1270 1271 /* 1272 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 1273 * sessions can be established after a resume. 1274 * 1275 * Also tear down aggregation sessions since reconfiguring 1276 * them in a hardware restart scenario is not easily done 1277 * right now, and the hardware will have lost information 1278 * about the sessions, but we and the AP still think they 1279 * are active. This is really a workaround though. 1280 */ 1281 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 1282 mutex_lock(&local->sta_mtx); 1283 1284 list_for_each_entry(sta, &local->sta_list, list) { 1285 ieee80211_sta_tear_down_BA_sessions(sta, true); 1286 clear_sta_flags(sta, WLAN_STA_BLOCK_BA); 1287 } 1288 1289 mutex_unlock(&local->sta_mtx); 1290 } 1291 1292 /* add back keys */ 1293 list_for_each_entry(sdata, &local->interfaces, list) 1294 if (ieee80211_sdata_running(sdata)) 1295 ieee80211_enable_keys(sdata); 1296 1297 wake_up: 1298 ieee80211_wake_queues_by_reason(hw, 1299 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 1300 1301 /* 1302 * If this is for hw restart things are still running. 1303 * We may want to change that later, however. 1304 */ 1305 if (!local->suspended) 1306 return 0; 1307 1308 #ifdef CONFIG_PM 1309 /* first set suspended false, then resuming */ 1310 local->suspended = false; 1311 mb(); 1312 local->resuming = false; 1313 1314 list_for_each_entry(sdata, &local->interfaces, list) { 1315 switch(sdata->vif.type) { 1316 case NL80211_IFTYPE_STATION: 1317 ieee80211_sta_restart(sdata); 1318 break; 1319 case NL80211_IFTYPE_ADHOC: 1320 ieee80211_ibss_restart(sdata); 1321 break; 1322 case NL80211_IFTYPE_MESH_POINT: 1323 ieee80211_mesh_restart(sdata); 1324 break; 1325 default: 1326 break; 1327 } 1328 } 1329 1330 mod_timer(&local->sta_cleanup, jiffies + 1); 1331 1332 mutex_lock(&local->sta_mtx); 1333 list_for_each_entry(sta, &local->sta_list, list) 1334 mesh_plink_restart(sta); 1335 mutex_unlock(&local->sta_mtx); 1336 #else 1337 WARN_ON(1); 1338 #endif 1339 return 0; 1340 } 1341 1342 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 1343 { 1344 struct ieee80211_sub_if_data *sdata; 1345 struct ieee80211_local *local; 1346 struct ieee80211_key *key; 1347 1348 if (WARN_ON(!vif)) 1349 return; 1350 1351 sdata = vif_to_sdata(vif); 1352 local = sdata->local; 1353 1354 if (WARN_ON(!local->resuming)) 1355 return; 1356 1357 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 1358 return; 1359 1360 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 1361 1362 mutex_lock(&local->key_mtx); 1363 list_for_each_entry(key, &sdata->key_list, list) 1364 key->flags |= KEY_FLAG_TAINTED; 1365 mutex_unlock(&local->key_mtx); 1366 } 1367 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 1368 1369 static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, 1370 enum ieee80211_smps_mode *smps_mode) 1371 { 1372 if (ifmgd->associated) { 1373 *smps_mode = ifmgd->ap_smps; 1374 1375 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { 1376 if (ifmgd->powersave) 1377 *smps_mode = IEEE80211_SMPS_DYNAMIC; 1378 else 1379 *smps_mode = IEEE80211_SMPS_OFF; 1380 } 1381 1382 return 1; 1383 } 1384 1385 return 0; 1386 } 1387 1388 /* must hold iflist_mtx */ 1389 void ieee80211_recalc_smps(struct ieee80211_local *local) 1390 { 1391 struct ieee80211_sub_if_data *sdata; 1392 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; 1393 int count = 0; 1394 1395 lockdep_assert_held(&local->iflist_mtx); 1396 1397 /* 1398 * This function could be improved to handle multiple 1399 * interfaces better, but right now it makes any 1400 * non-station interfaces force SM PS to be turned 1401 * off. If there are multiple station interfaces it 1402 * could also use the best possible mode, e.g. if 1403 * one is in static and the other in dynamic then 1404 * dynamic is ok. 1405 */ 1406 1407 list_for_each_entry(sdata, &local->interfaces, list) { 1408 if (!ieee80211_sdata_running(sdata)) 1409 continue; 1410 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1411 goto set; 1412 1413 count += check_mgd_smps(&sdata->u.mgd, &smps_mode); 1414 1415 if (count > 1) { 1416 smps_mode = IEEE80211_SMPS_OFF; 1417 break; 1418 } 1419 } 1420 1421 if (smps_mode == local->smps_mode) 1422 return; 1423 1424 set: 1425 local->smps_mode = smps_mode; 1426 /* changed flag is auto-detected for this */ 1427 ieee80211_hw_config(local, 0); 1428 } 1429 1430 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) 1431 { 1432 int i; 1433 1434 for (i = 0; i < n_ids; i++) 1435 if (ids[i] == id) 1436 return true; 1437 return false; 1438 } 1439 1440 /** 1441 * ieee80211_ie_split - split an IE buffer according to ordering 1442 * 1443 * @ies: the IE buffer 1444 * @ielen: the length of the IE buffer 1445 * @ids: an array with element IDs that are allowed before 1446 * the split 1447 * @n_ids: the size of the element ID array 1448 * @offset: offset where to start splitting in the buffer 1449 * 1450 * This function splits an IE buffer by updating the @offset 1451 * variable to point to the location where the buffer should be 1452 * split. 1453 * 1454 * It assumes that the given IE buffer is well-formed, this 1455 * has to be guaranteed by the caller! 1456 * 1457 * It also assumes that the IEs in the buffer are ordered 1458 * correctly, if not the result of using this function will not 1459 * be ordered correctly either, i.e. it does no reordering. 1460 * 1461 * The function returns the offset where the next part of the 1462 * buffer starts, which may be @ielen if the entire (remainder) 1463 * of the buffer should be used. 1464 */ 1465 size_t ieee80211_ie_split(const u8 *ies, size_t ielen, 1466 const u8 *ids, int n_ids, size_t offset) 1467 { 1468 size_t pos = offset; 1469 1470 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) 1471 pos += 2 + ies[pos + 1]; 1472 1473 return pos; 1474 } 1475 1476 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 1477 { 1478 size_t pos = offset; 1479 1480 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 1481 pos += 2 + ies[pos + 1]; 1482 1483 return pos; 1484 } 1485 1486 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 1487 int rssi_min_thold, 1488 int rssi_max_thold) 1489 { 1490 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 1491 1492 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1493 return; 1494 1495 /* 1496 * Scale up threshold values before storing it, as the RSSI averaging 1497 * algorithm uses a scaled up value as well. Change this scaling 1498 * factor if the RSSI averaging algorithm changes. 1499 */ 1500 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 1501 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 1502 } 1503 1504 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 1505 int rssi_min_thold, 1506 int rssi_max_thold) 1507 { 1508 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1509 1510 WARN_ON(rssi_min_thold == rssi_max_thold || 1511 rssi_min_thold > rssi_max_thold); 1512 1513 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 1514 rssi_max_thold); 1515 } 1516 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 1517 1518 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 1519 { 1520 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1521 1522 _ieee80211_enable_rssi_reports(sdata, 0, 0); 1523 } 1524 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 1525