1 /* 2 * BSS client mode implementation 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2004, Instant802 Networks, Inc. 5 * Copyright 2005, Devicescape Software, Inc. 6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * Copyright (C) 2015 Intel Deutschland GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #include <linux/delay.h> 17 #include <linux/if_ether.h> 18 #include <linux/skbuff.h> 19 #include <linux/if_arp.h> 20 #include <linux/etherdevice.h> 21 #include <linux/moduleparam.h> 22 #include <linux/rtnetlink.h> 23 #include <linux/pm_qos.h> 24 #include <linux/crc32.h> 25 #include <linux/slab.h> 26 #include <linux/export.h> 27 #include <net/mac80211.h> 28 #include <asm/unaligned.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "led.h" 34 35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * Weight given to the latest Beacon frame when calculating average signal 86 * strength for Beacon frames received in the current BSS. This must be 87 * between 1 and 15. 88 */ 89 #define IEEE80211_SIGNAL_AVE_WEIGHT 3 90 91 /* 92 * How many Beacon frames need to have been used in average signal strength 93 * before starting to indicate signal change events. 94 */ 95 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 96 97 /* 98 * We can have multiple work items (and connection probing) 99 * scheduling this timer, but we need to take care to only 100 * reschedule it when it should fire _earlier_ than it was 101 * asked for before, or if it's not pending right now. This 102 * function ensures that. Note that it then is required to 103 * run this function for all timeouts after the first one 104 * has happened -- the work that runs from this timer will 105 * do that. 106 */ 107 static void run_again(struct ieee80211_sub_if_data *sdata, 108 unsigned long timeout) 109 { 110 sdata_assert_lock(sdata); 111 112 if (!timer_pending(&sdata->u.mgd.timer) || 113 time_before(timeout, sdata->u.mgd.timer.expires)) 114 mod_timer(&sdata->u.mgd.timer, timeout); 115 } 116 117 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 118 { 119 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 120 return; 121 122 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 123 return; 124 125 mod_timer(&sdata->u.mgd.bcn_mon_timer, 126 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 127 } 128 129 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 130 { 131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 132 133 if (unlikely(!sdata->u.mgd.associated)) 134 return; 135 136 ifmgd->probe_send_count = 0; 137 138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 139 return; 140 141 mod_timer(&sdata->u.mgd.conn_mon_timer, 142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 143 } 144 145 static int ecw2cw(int ecw) 146 { 147 return (1 << ecw) - 1; 148 } 149 150 static u32 151 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 152 struct ieee80211_supported_band *sband, 153 struct ieee80211_channel *channel, 154 const struct ieee80211_ht_cap *ht_cap, 155 const struct ieee80211_ht_operation *ht_oper, 156 const struct ieee80211_vht_operation *vht_oper, 157 struct cfg80211_chan_def *chandef, bool tracking) 158 { 159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 160 struct cfg80211_chan_def vht_chandef; 161 struct ieee80211_sta_ht_cap sta_ht_cap; 162 u32 ht_cfreq, ret; 163 164 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 165 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 166 167 chandef->chan = channel; 168 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 169 chandef->center_freq1 = channel->center_freq; 170 chandef->center_freq2 = 0; 171 172 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) { 173 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 174 goto out; 175 } 176 177 chandef->width = NL80211_CHAN_WIDTH_20; 178 179 if (!(ht_cap->cap_info & 180 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 181 ret = IEEE80211_STA_DISABLE_40MHZ; 182 vht_chandef = *chandef; 183 goto out; 184 } 185 186 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 187 channel->band); 188 /* check that channel matches the right operating channel */ 189 if (!tracking && channel->center_freq != ht_cfreq) { 190 /* 191 * It's possible that some APs are confused here; 192 * Netgear WNDR3700 sometimes reports 4 higher than 193 * the actual channel in association responses, but 194 * since we look at probe response/beacon data here 195 * it should be OK. 196 */ 197 sdata_info(sdata, 198 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 199 channel->center_freq, ht_cfreq, 200 ht_oper->primary_chan, channel->band); 201 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 202 goto out; 203 } 204 205 /* check 40 MHz support, if we have it */ 206 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 207 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 208 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 209 chandef->width = NL80211_CHAN_WIDTH_40; 210 chandef->center_freq1 += 10; 211 break; 212 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 213 chandef->width = NL80211_CHAN_WIDTH_40; 214 chandef->center_freq1 -= 10; 215 break; 216 } 217 } else { 218 /* 40 MHz (and 80 MHz) must be supported for VHT */ 219 ret = IEEE80211_STA_DISABLE_VHT; 220 /* also mark 40 MHz disabled */ 221 ret |= IEEE80211_STA_DISABLE_40MHZ; 222 goto out; 223 } 224 225 if (!vht_oper || !sband->vht_cap.vht_supported) { 226 ret = IEEE80211_STA_DISABLE_VHT; 227 goto out; 228 } 229 230 vht_chandef.chan = channel; 231 vht_chandef.center_freq1 = 232 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, 233 channel->band); 234 vht_chandef.center_freq2 = 0; 235 236 switch (vht_oper->chan_width) { 237 case IEEE80211_VHT_CHANWIDTH_USE_HT: 238 vht_chandef.width = chandef->width; 239 vht_chandef.center_freq1 = chandef->center_freq1; 240 break; 241 case IEEE80211_VHT_CHANWIDTH_80MHZ: 242 vht_chandef.width = NL80211_CHAN_WIDTH_80; 243 break; 244 case IEEE80211_VHT_CHANWIDTH_160MHZ: 245 vht_chandef.width = NL80211_CHAN_WIDTH_160; 246 break; 247 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 248 vht_chandef.width = NL80211_CHAN_WIDTH_80P80; 249 vht_chandef.center_freq2 = 250 ieee80211_channel_to_frequency( 251 vht_oper->center_freq_seg2_idx, 252 channel->band); 253 break; 254 default: 255 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 256 sdata_info(sdata, 257 "AP VHT operation IE has invalid channel width (%d), disable VHT\n", 258 vht_oper->chan_width); 259 ret = IEEE80211_STA_DISABLE_VHT; 260 goto out; 261 } 262 263 if (!cfg80211_chandef_valid(&vht_chandef)) { 264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 265 sdata_info(sdata, 266 "AP VHT information is invalid, disable VHT\n"); 267 ret = IEEE80211_STA_DISABLE_VHT; 268 goto out; 269 } 270 271 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 272 ret = 0; 273 goto out; 274 } 275 276 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 277 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 278 sdata_info(sdata, 279 "AP VHT information doesn't match HT, disable VHT\n"); 280 ret = IEEE80211_STA_DISABLE_VHT; 281 goto out; 282 } 283 284 *chandef = vht_chandef; 285 286 ret = 0; 287 288 out: 289 /* 290 * When tracking the current AP, don't do any further checks if the 291 * new chandef is identical to the one we're currently using for the 292 * connection. This keeps us from playing ping-pong with regulatory, 293 * without it the following can happen (for example): 294 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 295 * - AP advertises regdom US 296 * - CRDA loads regdom US with 80 MHz prohibited (old database) 297 * - the code below detects an unsupported channel, downgrades, and 298 * we disconnect from the AP in the caller 299 * - disconnect causes CRDA to reload world regdomain and the game 300 * starts anew. 301 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 302 * 303 * It seems possible that there are still scenarios with CSA or real 304 * bandwidth changes where a this could happen, but those cases are 305 * less common and wouldn't completely prevent using the AP. 306 */ 307 if (tracking && 308 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 309 return ret; 310 311 /* don't print the message below for VHT mismatch if VHT is disabled */ 312 if (ret & IEEE80211_STA_DISABLE_VHT) 313 vht_chandef = *chandef; 314 315 /* 316 * Ignore the DISABLED flag when we're already connected and only 317 * tracking the APs beacon for bandwidth changes - otherwise we 318 * might get disconnected here if we connect to an AP, update our 319 * regulatory information based on the AP's country IE and the 320 * information we have is wrong/outdated and disables the channel 321 * that we're actually using for the connection to the AP. 322 */ 323 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 324 tracking ? 0 : 325 IEEE80211_CHAN_DISABLED)) { 326 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 327 ret = IEEE80211_STA_DISABLE_HT | 328 IEEE80211_STA_DISABLE_VHT; 329 break; 330 } 331 332 ret |= ieee80211_chandef_downgrade(chandef); 333 } 334 335 if (chandef->width != vht_chandef.width && !tracking) 336 sdata_info(sdata, 337 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 338 339 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 340 return ret; 341 } 342 343 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 344 struct sta_info *sta, 345 const struct ieee80211_ht_cap *ht_cap, 346 const struct ieee80211_ht_operation *ht_oper, 347 const struct ieee80211_vht_operation *vht_oper, 348 const u8 *bssid, u32 *changed) 349 { 350 struct ieee80211_local *local = sdata->local; 351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 352 struct ieee80211_supported_band *sband; 353 struct ieee80211_channel *chan; 354 struct cfg80211_chan_def chandef; 355 u16 ht_opmode; 356 u32 flags; 357 enum ieee80211_sta_rx_bandwidth new_sta_bw; 358 int ret; 359 360 /* if HT was/is disabled, don't track any bandwidth changes */ 361 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 362 return 0; 363 364 /* don't check VHT if we associated as non-VHT station */ 365 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 366 vht_oper = NULL; 367 368 if (WARN_ON_ONCE(!sta)) 369 return -EINVAL; 370 371 /* 372 * if bss configuration changed store the new one - 373 * this may be applicable even if channel is identical 374 */ 375 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 376 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 377 *changed |= BSS_CHANGED_HT; 378 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 379 } 380 381 chan = sdata->vif.bss_conf.chandef.chan; 382 sband = local->hw.wiphy->bands[chan->band]; 383 384 /* calculate new channel (type) based on HT/VHT operation IEs */ 385 flags = ieee80211_determine_chantype(sdata, sband, chan, 386 ht_cap, ht_oper, vht_oper, 387 &chandef, true); 388 389 /* 390 * Downgrade the new channel if we associated with restricted 391 * capabilities. For example, if we associated as a 20 MHz STA 392 * to a 40 MHz AP (due to regulatory, capabilities or config 393 * reasons) then switching to a 40 MHz channel now won't do us 394 * any good -- we couldn't use it with the AP. 395 */ 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 397 chandef.width == NL80211_CHAN_WIDTH_80P80) 398 flags |= ieee80211_chandef_downgrade(&chandef); 399 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 400 chandef.width == NL80211_CHAN_WIDTH_160) 401 flags |= ieee80211_chandef_downgrade(&chandef); 402 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 403 chandef.width > NL80211_CHAN_WIDTH_20) 404 flags |= ieee80211_chandef_downgrade(&chandef); 405 406 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 407 return 0; 408 409 sdata_info(sdata, 410 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 411 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 412 chandef.center_freq1, chandef.center_freq2); 413 414 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 415 IEEE80211_STA_DISABLE_VHT | 416 IEEE80211_STA_DISABLE_40MHZ | 417 IEEE80211_STA_DISABLE_80P80MHZ | 418 IEEE80211_STA_DISABLE_160MHZ)) || 419 !cfg80211_chandef_valid(&chandef)) { 420 sdata_info(sdata, 421 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 422 ifmgd->bssid); 423 return -EINVAL; 424 } 425 426 switch (chandef.width) { 427 case NL80211_CHAN_WIDTH_20_NOHT: 428 case NL80211_CHAN_WIDTH_20: 429 new_sta_bw = IEEE80211_STA_RX_BW_20; 430 break; 431 case NL80211_CHAN_WIDTH_40: 432 new_sta_bw = IEEE80211_STA_RX_BW_40; 433 break; 434 case NL80211_CHAN_WIDTH_80: 435 new_sta_bw = IEEE80211_STA_RX_BW_80; 436 break; 437 case NL80211_CHAN_WIDTH_80P80: 438 case NL80211_CHAN_WIDTH_160: 439 new_sta_bw = IEEE80211_STA_RX_BW_160; 440 break; 441 default: 442 return -EINVAL; 443 } 444 445 if (new_sta_bw > sta->cur_max_bandwidth) 446 new_sta_bw = sta->cur_max_bandwidth; 447 448 if (new_sta_bw < sta->sta.bandwidth) { 449 sta->sta.bandwidth = new_sta_bw; 450 rate_control_rate_update(local, sband, sta, 451 IEEE80211_RC_BW_CHANGED); 452 } 453 454 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 455 if (ret) { 456 sdata_info(sdata, 457 "AP %pM changed bandwidth to incompatible one - disconnect\n", 458 ifmgd->bssid); 459 return ret; 460 } 461 462 if (new_sta_bw > sta->sta.bandwidth) { 463 sta->sta.bandwidth = new_sta_bw; 464 rate_control_rate_update(local, sband, sta, 465 IEEE80211_RC_BW_CHANGED); 466 } 467 468 return 0; 469 } 470 471 /* frame sending functions */ 472 473 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 474 struct sk_buff *skb, u8 ap_ht_param, 475 struct ieee80211_supported_band *sband, 476 struct ieee80211_channel *channel, 477 enum ieee80211_smps_mode smps) 478 { 479 u8 *pos; 480 u32 flags = channel->flags; 481 u16 cap; 482 struct ieee80211_sta_ht_cap ht_cap; 483 484 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 485 486 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 487 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 488 489 /* determine capability flags */ 490 cap = ht_cap.cap; 491 492 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 493 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 494 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 496 cap &= ~IEEE80211_HT_CAP_SGI_40; 497 } 498 break; 499 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 500 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 501 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 502 cap &= ~IEEE80211_HT_CAP_SGI_40; 503 } 504 break; 505 } 506 507 /* 508 * If 40 MHz was disabled associate as though we weren't 509 * capable of 40 MHz -- some broken APs will never fall 510 * back to trying to transmit in 20 MHz. 511 */ 512 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 513 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 514 cap &= ~IEEE80211_HT_CAP_SGI_40; 515 } 516 517 /* set SM PS mode properly */ 518 cap &= ~IEEE80211_HT_CAP_SM_PS; 519 switch (smps) { 520 case IEEE80211_SMPS_AUTOMATIC: 521 case IEEE80211_SMPS_NUM_MODES: 522 WARN_ON(1); 523 case IEEE80211_SMPS_OFF: 524 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 525 IEEE80211_HT_CAP_SM_PS_SHIFT; 526 break; 527 case IEEE80211_SMPS_STATIC: 528 cap |= WLAN_HT_CAP_SM_PS_STATIC << 529 IEEE80211_HT_CAP_SM_PS_SHIFT; 530 break; 531 case IEEE80211_SMPS_DYNAMIC: 532 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 533 IEEE80211_HT_CAP_SM_PS_SHIFT; 534 break; 535 } 536 537 /* reserve and fill IE */ 538 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 539 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 540 } 541 542 /* This function determines vht capability flags for the association 543 * and builds the IE. 544 * Note - the function may set the owner of the MU-MIMO capability 545 */ 546 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 547 struct sk_buff *skb, 548 struct ieee80211_supported_band *sband, 549 struct ieee80211_vht_cap *ap_vht_cap) 550 { 551 struct ieee80211_local *local = sdata->local; 552 u8 *pos; 553 u32 cap; 554 struct ieee80211_sta_vht_cap vht_cap; 555 u32 mask, ap_bf_sts, our_bf_sts; 556 557 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 558 559 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 560 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 561 562 /* determine capability flags */ 563 cap = vht_cap.cap; 564 565 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 566 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 567 568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 569 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 570 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 571 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 572 } 573 574 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 575 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 576 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 577 } 578 579 /* 580 * Some APs apparently get confused if our capabilities are better 581 * than theirs, so restrict what we advertise in the assoc request. 582 */ 583 if (!(ap_vht_cap->vht_cap_info & 584 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 585 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 586 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 587 else if (!(ap_vht_cap->vht_cap_info & 588 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 589 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 590 591 /* 592 * If some other vif is using the MU-MIMO capablity we cannot associate 593 * using MU-MIMO - this will lead to contradictions in the group-id 594 * mechanism. 595 * Ownership is defined since association request, in order to avoid 596 * simultaneous associations with MU-MIMO. 597 */ 598 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 599 bool disable_mu_mimo = false; 600 struct ieee80211_sub_if_data *other; 601 602 list_for_each_entry_rcu(other, &local->interfaces, list) { 603 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) { 604 disable_mu_mimo = true; 605 break; 606 } 607 } 608 if (disable_mu_mimo) 609 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 610 else 611 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER; 612 } 613 614 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 615 616 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 617 our_bf_sts = cap & mask; 618 619 if (ap_bf_sts < our_bf_sts) { 620 cap &= ~mask; 621 cap |= ap_bf_sts; 622 } 623 624 /* reserve and fill IE */ 625 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 626 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 627 } 628 629 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 630 { 631 struct ieee80211_local *local = sdata->local; 632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 633 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 634 struct sk_buff *skb; 635 struct ieee80211_mgmt *mgmt; 636 u8 *pos, qos_info; 637 size_t offset = 0, noffset; 638 int i, count, rates_len, supp_rates_len, shift; 639 u16 capab; 640 struct ieee80211_supported_band *sband; 641 struct ieee80211_chanctx_conf *chanctx_conf; 642 struct ieee80211_channel *chan; 643 u32 rate_flags, rates = 0; 644 645 sdata_assert_lock(sdata); 646 647 rcu_read_lock(); 648 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 649 if (WARN_ON(!chanctx_conf)) { 650 rcu_read_unlock(); 651 return; 652 } 653 chan = chanctx_conf->def.chan; 654 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 655 rcu_read_unlock(); 656 sband = local->hw.wiphy->bands[chan->band]; 657 shift = ieee80211_vif_get_shift(&sdata->vif); 658 659 if (assoc_data->supp_rates_len) { 660 /* 661 * Get all rates supported by the device and the AP as 662 * some APs don't like getting a superset of their rates 663 * in the association request (e.g. D-Link DAP 1353 in 664 * b-only mode)... 665 */ 666 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 667 assoc_data->supp_rates, 668 assoc_data->supp_rates_len, 669 &rates); 670 } else { 671 /* 672 * In case AP not provide any supported rates information 673 * before association, we send information element(s) with 674 * all rates that we support. 675 */ 676 rates_len = 0; 677 for (i = 0; i < sband->n_bitrates; i++) { 678 if ((rate_flags & sband->bitrates[i].flags) 679 != rate_flags) 680 continue; 681 rates |= BIT(i); 682 rates_len++; 683 } 684 } 685 686 skb = alloc_skb(local->hw.extra_tx_headroom + 687 sizeof(*mgmt) + /* bit too much but doesn't matter */ 688 2 + assoc_data->ssid_len + /* SSID */ 689 4 + rates_len + /* (extended) rates */ 690 4 + /* power capability */ 691 2 + 2 * sband->n_channels + /* supported channels */ 692 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 693 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 694 assoc_data->ie_len + /* extra IEs */ 695 9, /* WMM */ 696 GFP_KERNEL); 697 if (!skb) 698 return; 699 700 skb_reserve(skb, local->hw.extra_tx_headroom); 701 702 capab = WLAN_CAPABILITY_ESS; 703 704 if (sband->band == IEEE80211_BAND_2GHZ) { 705 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 706 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 707 } 708 709 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 710 capab |= WLAN_CAPABILITY_PRIVACY; 711 712 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 713 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 714 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 715 716 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 717 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 718 719 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 720 memset(mgmt, 0, 24); 721 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 722 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 723 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 724 725 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 726 skb_put(skb, 10); 727 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 728 IEEE80211_STYPE_REASSOC_REQ); 729 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 730 mgmt->u.reassoc_req.listen_interval = 731 cpu_to_le16(local->hw.conf.listen_interval); 732 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 733 ETH_ALEN); 734 } else { 735 skb_put(skb, 4); 736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 737 IEEE80211_STYPE_ASSOC_REQ); 738 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 739 mgmt->u.assoc_req.listen_interval = 740 cpu_to_le16(local->hw.conf.listen_interval); 741 } 742 743 /* SSID */ 744 pos = skb_put(skb, 2 + assoc_data->ssid_len); 745 *pos++ = WLAN_EID_SSID; 746 *pos++ = assoc_data->ssid_len; 747 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 748 749 /* add all rates which were marked to be used above */ 750 supp_rates_len = rates_len; 751 if (supp_rates_len > 8) 752 supp_rates_len = 8; 753 754 pos = skb_put(skb, supp_rates_len + 2); 755 *pos++ = WLAN_EID_SUPP_RATES; 756 *pos++ = supp_rates_len; 757 758 count = 0; 759 for (i = 0; i < sband->n_bitrates; i++) { 760 if (BIT(i) & rates) { 761 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 762 5 * (1 << shift)); 763 *pos++ = (u8) rate; 764 if (++count == 8) 765 break; 766 } 767 } 768 769 if (rates_len > count) { 770 pos = skb_put(skb, rates_len - count + 2); 771 *pos++ = WLAN_EID_EXT_SUPP_RATES; 772 *pos++ = rates_len - count; 773 774 for (i++; i < sband->n_bitrates; i++) { 775 if (BIT(i) & rates) { 776 int rate; 777 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 778 5 * (1 << shift)); 779 *pos++ = (u8) rate; 780 } 781 } 782 } 783 784 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 785 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 786 pos = skb_put(skb, 4); 787 *pos++ = WLAN_EID_PWR_CAPABILITY; 788 *pos++ = 2; 789 *pos++ = 0; /* min tx power */ 790 /* max tx power */ 791 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 792 } 793 794 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 795 /* TODO: get this in reg domain format */ 796 pos = skb_put(skb, 2 * sband->n_channels + 2); 797 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 798 *pos++ = 2 * sband->n_channels; 799 for (i = 0; i < sband->n_channels; i++) { 800 *pos++ = ieee80211_frequency_to_channel( 801 sband->channels[i].center_freq); 802 *pos++ = 1; /* one channel in the subband*/ 803 } 804 } 805 806 /* if present, add any custom IEs that go before HT */ 807 if (assoc_data->ie_len) { 808 static const u8 before_ht[] = { 809 WLAN_EID_SSID, 810 WLAN_EID_SUPP_RATES, 811 WLAN_EID_EXT_SUPP_RATES, 812 WLAN_EID_PWR_CAPABILITY, 813 WLAN_EID_SUPPORTED_CHANNELS, 814 WLAN_EID_RSN, 815 WLAN_EID_QOS_CAPA, 816 WLAN_EID_RRM_ENABLED_CAPABILITIES, 817 WLAN_EID_MOBILITY_DOMAIN, 818 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 819 WLAN_EID_RIC_DATA, /* reassoc only */ 820 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 821 }; 822 static const u8 after_ric[] = { 823 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 824 WLAN_EID_HT_CAPABILITY, 825 WLAN_EID_BSS_COEX_2040, 826 WLAN_EID_EXT_CAPABILITY, 827 WLAN_EID_QOS_TRAFFIC_CAPA, 828 WLAN_EID_TIM_BCAST_REQ, 829 WLAN_EID_INTERWORKING, 830 /* 60GHz doesn't happen right now */ 831 WLAN_EID_VHT_CAPABILITY, 832 WLAN_EID_OPMODE_NOTIF, 833 }; 834 835 noffset = ieee80211_ie_split_ric(assoc_data->ie, 836 assoc_data->ie_len, 837 before_ht, 838 ARRAY_SIZE(before_ht), 839 after_ric, 840 ARRAY_SIZE(after_ric), 841 offset); 842 pos = skb_put(skb, noffset - offset); 843 memcpy(pos, assoc_data->ie + offset, noffset - offset); 844 offset = noffset; 845 } 846 847 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 848 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 849 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 850 851 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 852 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 853 sband, chan, sdata->smps_mode); 854 855 /* if present, add any custom IEs that go before VHT */ 856 if (assoc_data->ie_len) { 857 static const u8 before_vht[] = { 858 WLAN_EID_SSID, 859 WLAN_EID_SUPP_RATES, 860 WLAN_EID_EXT_SUPP_RATES, 861 WLAN_EID_PWR_CAPABILITY, 862 WLAN_EID_SUPPORTED_CHANNELS, 863 WLAN_EID_RSN, 864 WLAN_EID_QOS_CAPA, 865 WLAN_EID_RRM_ENABLED_CAPABILITIES, 866 WLAN_EID_MOBILITY_DOMAIN, 867 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 868 WLAN_EID_HT_CAPABILITY, 869 WLAN_EID_BSS_COEX_2040, 870 WLAN_EID_EXT_CAPABILITY, 871 WLAN_EID_QOS_TRAFFIC_CAPA, 872 WLAN_EID_TIM_BCAST_REQ, 873 WLAN_EID_INTERWORKING, 874 }; 875 876 /* RIC already taken above, so no need to handle here anymore */ 877 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 878 before_vht, ARRAY_SIZE(before_vht), 879 offset); 880 pos = skb_put(skb, noffset - offset); 881 memcpy(pos, assoc_data->ie + offset, noffset - offset); 882 offset = noffset; 883 } 884 885 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 886 ieee80211_add_vht_ie(sdata, skb, sband, 887 &assoc_data->ap_vht_cap); 888 889 /* if present, add any custom non-vendor IEs that go after HT */ 890 if (assoc_data->ie_len) { 891 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 892 assoc_data->ie_len, 893 offset); 894 pos = skb_put(skb, noffset - offset); 895 memcpy(pos, assoc_data->ie + offset, noffset - offset); 896 offset = noffset; 897 } 898 899 if (assoc_data->wmm) { 900 if (assoc_data->uapsd) { 901 qos_info = ifmgd->uapsd_queues; 902 qos_info |= (ifmgd->uapsd_max_sp_len << 903 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 904 } else { 905 qos_info = 0; 906 } 907 908 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 909 } 910 911 /* add any remaining custom (i.e. vendor specific here) IEs */ 912 if (assoc_data->ie_len) { 913 noffset = assoc_data->ie_len; 914 pos = skb_put(skb, noffset - offset); 915 memcpy(pos, assoc_data->ie + offset, noffset - offset); 916 } 917 918 drv_mgd_prepare_tx(local, sdata); 919 920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 921 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 922 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 923 IEEE80211_TX_INTFL_MLME_CONN_TX; 924 ieee80211_tx_skb(sdata, skb); 925 } 926 927 void ieee80211_send_pspoll(struct ieee80211_local *local, 928 struct ieee80211_sub_if_data *sdata) 929 { 930 struct ieee80211_pspoll *pspoll; 931 struct sk_buff *skb; 932 933 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 934 if (!skb) 935 return; 936 937 pspoll = (struct ieee80211_pspoll *) skb->data; 938 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 939 940 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 941 ieee80211_tx_skb(sdata, skb); 942 } 943 944 void ieee80211_send_nullfunc(struct ieee80211_local *local, 945 struct ieee80211_sub_if_data *sdata, 946 int powersave) 947 { 948 struct sk_buff *skb; 949 struct ieee80211_hdr_3addr *nullfunc; 950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 951 952 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 953 if (!skb) 954 return; 955 956 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 957 if (powersave) 958 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 959 960 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 961 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 962 963 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 964 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 965 966 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 968 969 ieee80211_tx_skb(sdata, skb); 970 } 971 972 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 973 struct ieee80211_sub_if_data *sdata) 974 { 975 struct sk_buff *skb; 976 struct ieee80211_hdr *nullfunc; 977 __le16 fc; 978 979 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 980 return; 981 982 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 983 if (!skb) 984 return; 985 986 skb_reserve(skb, local->hw.extra_tx_headroom); 987 988 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 989 memset(nullfunc, 0, 30); 990 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 991 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 992 nullfunc->frame_control = fc; 993 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 994 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 995 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 996 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 997 998 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 999 ieee80211_tx_skb(sdata, skb); 1000 } 1001 1002 /* spectrum management related things */ 1003 static void ieee80211_chswitch_work(struct work_struct *work) 1004 { 1005 struct ieee80211_sub_if_data *sdata = 1006 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1007 struct ieee80211_local *local = sdata->local; 1008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1009 int ret; 1010 1011 if (!ieee80211_sdata_running(sdata)) 1012 return; 1013 1014 sdata_lock(sdata); 1015 mutex_lock(&local->mtx); 1016 mutex_lock(&local->chanctx_mtx); 1017 1018 if (!ifmgd->associated) 1019 goto out; 1020 1021 if (!sdata->vif.csa_active) 1022 goto out; 1023 1024 /* 1025 * using reservation isn't immediate as it may be deferred until later 1026 * with multi-vif. once reservation is complete it will re-schedule the 1027 * work with no reserved_chanctx so verify chandef to check if it 1028 * completed successfully 1029 */ 1030 1031 if (sdata->reserved_chanctx) { 1032 /* 1033 * with multi-vif csa driver may call ieee80211_csa_finish() 1034 * many times while waiting for other interfaces to use their 1035 * reservations 1036 */ 1037 if (sdata->reserved_ready) 1038 goto out; 1039 1040 ret = ieee80211_vif_use_reserved_context(sdata); 1041 if (ret) { 1042 sdata_info(sdata, 1043 "failed to use reserved channel context, disconnecting (err=%d)\n", 1044 ret); 1045 ieee80211_queue_work(&sdata->local->hw, 1046 &ifmgd->csa_connection_drop_work); 1047 goto out; 1048 } 1049 1050 goto out; 1051 } 1052 1053 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1054 &sdata->csa_chandef)) { 1055 sdata_info(sdata, 1056 "failed to finalize channel switch, disconnecting\n"); 1057 ieee80211_queue_work(&sdata->local->hw, 1058 &ifmgd->csa_connection_drop_work); 1059 goto out; 1060 } 1061 1062 /* XXX: shouldn't really modify cfg80211-owned data! */ 1063 ifmgd->associated->channel = sdata->csa_chandef.chan; 1064 1065 ifmgd->csa_waiting_bcn = true; 1066 1067 ieee80211_sta_reset_beacon_monitor(sdata); 1068 ieee80211_sta_reset_conn_monitor(sdata); 1069 1070 out: 1071 mutex_unlock(&local->chanctx_mtx); 1072 mutex_unlock(&local->mtx); 1073 sdata_unlock(sdata); 1074 } 1075 1076 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1077 { 1078 struct ieee80211_local *local = sdata->local; 1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1080 int ret; 1081 1082 sdata_assert_lock(sdata); 1083 1084 WARN_ON(!sdata->vif.csa_active); 1085 1086 if (sdata->csa_block_tx) { 1087 ieee80211_wake_vif_queues(local, sdata, 1088 IEEE80211_QUEUE_STOP_REASON_CSA); 1089 sdata->csa_block_tx = false; 1090 } 1091 1092 sdata->vif.csa_active = false; 1093 ifmgd->csa_waiting_bcn = false; 1094 1095 ret = drv_post_channel_switch(sdata); 1096 if (ret) { 1097 sdata_info(sdata, 1098 "driver post channel switch failed, disconnecting\n"); 1099 ieee80211_queue_work(&local->hw, 1100 &ifmgd->csa_connection_drop_work); 1101 return; 1102 } 1103 1104 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1105 } 1106 1107 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1108 { 1109 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1111 1112 trace_api_chswitch_done(sdata, success); 1113 if (!success) { 1114 sdata_info(sdata, 1115 "driver channel switch failed, disconnecting\n"); 1116 ieee80211_queue_work(&sdata->local->hw, 1117 &ifmgd->csa_connection_drop_work); 1118 } else { 1119 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1120 } 1121 } 1122 EXPORT_SYMBOL(ieee80211_chswitch_done); 1123 1124 static void ieee80211_chswitch_timer(unsigned long data) 1125 { 1126 struct ieee80211_sub_if_data *sdata = 1127 (struct ieee80211_sub_if_data *) data; 1128 1129 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1130 } 1131 1132 static void 1133 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1134 u64 timestamp, u32 device_timestamp, 1135 struct ieee802_11_elems *elems, 1136 bool beacon) 1137 { 1138 struct ieee80211_local *local = sdata->local; 1139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1140 struct cfg80211_bss *cbss = ifmgd->associated; 1141 struct ieee80211_chanctx_conf *conf; 1142 struct ieee80211_chanctx *chanctx; 1143 enum ieee80211_band current_band; 1144 struct ieee80211_csa_ie csa_ie; 1145 struct ieee80211_channel_switch ch_switch; 1146 int res; 1147 1148 sdata_assert_lock(sdata); 1149 1150 if (!cbss) 1151 return; 1152 1153 if (local->scanning) 1154 return; 1155 1156 /* disregard subsequent announcements if we are already processing */ 1157 if (sdata->vif.csa_active) 1158 return; 1159 1160 current_band = cbss->channel->band; 1161 memset(&csa_ie, 0, sizeof(csa_ie)); 1162 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1163 ifmgd->flags, 1164 ifmgd->associated->bssid, &csa_ie); 1165 if (res < 0) 1166 ieee80211_queue_work(&local->hw, 1167 &ifmgd->csa_connection_drop_work); 1168 if (res) 1169 return; 1170 1171 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1172 IEEE80211_CHAN_DISABLED)) { 1173 sdata_info(sdata, 1174 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1175 ifmgd->associated->bssid, 1176 csa_ie.chandef.chan->center_freq, 1177 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1178 csa_ie.chandef.center_freq2); 1179 ieee80211_queue_work(&local->hw, 1180 &ifmgd->csa_connection_drop_work); 1181 return; 1182 } 1183 1184 if (cfg80211_chandef_identical(&csa_ie.chandef, 1185 &sdata->vif.bss_conf.chandef)) { 1186 if (ifmgd->csa_ignored_same_chan) 1187 return; 1188 sdata_info(sdata, 1189 "AP %pM tries to chanswitch to same channel, ignore\n", 1190 ifmgd->associated->bssid); 1191 ifmgd->csa_ignored_same_chan = true; 1192 return; 1193 } 1194 1195 /* 1196 * Drop all TDLS peers - either we disconnect or move to a different 1197 * channel from this point on. There's no telling what our peer will do. 1198 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1199 * have an incompatible wider chandef. 1200 */ 1201 ieee80211_teardown_tdls_peers(sdata); 1202 1203 mutex_lock(&local->mtx); 1204 mutex_lock(&local->chanctx_mtx); 1205 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1206 lockdep_is_held(&local->chanctx_mtx)); 1207 if (!conf) { 1208 sdata_info(sdata, 1209 "no channel context assigned to vif?, disconnecting\n"); 1210 goto drop_connection; 1211 } 1212 1213 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1214 1215 if (local->use_chanctx && 1216 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1217 sdata_info(sdata, 1218 "driver doesn't support chan-switch with channel contexts\n"); 1219 goto drop_connection; 1220 } 1221 1222 ch_switch.timestamp = timestamp; 1223 ch_switch.device_timestamp = device_timestamp; 1224 ch_switch.block_tx = csa_ie.mode; 1225 ch_switch.chandef = csa_ie.chandef; 1226 ch_switch.count = csa_ie.count; 1227 1228 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1229 sdata_info(sdata, 1230 "preparing for channel switch failed, disconnecting\n"); 1231 goto drop_connection; 1232 } 1233 1234 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1235 chanctx->mode, false); 1236 if (res) { 1237 sdata_info(sdata, 1238 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1239 res); 1240 goto drop_connection; 1241 } 1242 mutex_unlock(&local->chanctx_mtx); 1243 1244 sdata->vif.csa_active = true; 1245 sdata->csa_chandef = csa_ie.chandef; 1246 sdata->csa_block_tx = csa_ie.mode; 1247 ifmgd->csa_ignored_same_chan = false; 1248 1249 if (sdata->csa_block_tx) 1250 ieee80211_stop_vif_queues(local, sdata, 1251 IEEE80211_QUEUE_STOP_REASON_CSA); 1252 mutex_unlock(&local->mtx); 1253 1254 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1255 csa_ie.count); 1256 1257 if (local->ops->channel_switch) { 1258 /* use driver's channel switch callback */ 1259 drv_channel_switch(local, sdata, &ch_switch); 1260 return; 1261 } 1262 1263 /* channel switch handled in software */ 1264 if (csa_ie.count <= 1) 1265 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1266 else 1267 mod_timer(&ifmgd->chswitch_timer, 1268 TU_TO_EXP_TIME((csa_ie.count - 1) * 1269 cbss->beacon_interval)); 1270 return; 1271 drop_connection: 1272 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1273 mutex_unlock(&local->chanctx_mtx); 1274 mutex_unlock(&local->mtx); 1275 } 1276 1277 static bool 1278 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1279 struct ieee80211_channel *channel, 1280 const u8 *country_ie, u8 country_ie_len, 1281 const u8 *pwr_constr_elem, 1282 int *chan_pwr, int *pwr_reduction) 1283 { 1284 struct ieee80211_country_ie_triplet *triplet; 1285 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1286 int i, chan_increment; 1287 bool have_chan_pwr = false; 1288 1289 /* Invalid IE */ 1290 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1291 return false; 1292 1293 triplet = (void *)(country_ie + 3); 1294 country_ie_len -= 3; 1295 1296 switch (channel->band) { 1297 default: 1298 WARN_ON_ONCE(1); 1299 /* fall through */ 1300 case IEEE80211_BAND_2GHZ: 1301 case IEEE80211_BAND_60GHZ: 1302 chan_increment = 1; 1303 break; 1304 case IEEE80211_BAND_5GHZ: 1305 chan_increment = 4; 1306 break; 1307 } 1308 1309 /* find channel */ 1310 while (country_ie_len >= 3) { 1311 u8 first_channel = triplet->chans.first_channel; 1312 1313 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1314 goto next; 1315 1316 for (i = 0; i < triplet->chans.num_channels; i++) { 1317 if (first_channel + i * chan_increment == chan) { 1318 have_chan_pwr = true; 1319 *chan_pwr = triplet->chans.max_power; 1320 break; 1321 } 1322 } 1323 if (have_chan_pwr) 1324 break; 1325 1326 next: 1327 triplet++; 1328 country_ie_len -= 3; 1329 } 1330 1331 if (have_chan_pwr && pwr_constr_elem) 1332 *pwr_reduction = *pwr_constr_elem; 1333 else 1334 *pwr_reduction = 0; 1335 1336 return have_chan_pwr; 1337 } 1338 1339 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1340 struct ieee80211_channel *channel, 1341 const u8 *cisco_dtpc_ie, 1342 int *pwr_level) 1343 { 1344 /* From practical testing, the first data byte of the DTPC element 1345 * seems to contain the requested dBm level, and the CLI on Cisco 1346 * APs clearly state the range is -127 to 127 dBm, which indicates 1347 * a signed byte, although it seemingly never actually goes negative. 1348 * The other byte seems to always be zero. 1349 */ 1350 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1351 } 1352 1353 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1354 struct ieee80211_channel *channel, 1355 struct ieee80211_mgmt *mgmt, 1356 const u8 *country_ie, u8 country_ie_len, 1357 const u8 *pwr_constr_ie, 1358 const u8 *cisco_dtpc_ie) 1359 { 1360 bool has_80211h_pwr = false, has_cisco_pwr = false; 1361 int chan_pwr = 0, pwr_reduction_80211h = 0; 1362 int pwr_level_cisco, pwr_level_80211h; 1363 int new_ap_level; 1364 __le16 capab = mgmt->u.probe_resp.capab_info; 1365 1366 if (country_ie && 1367 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1368 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1369 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1370 sdata, channel, country_ie, country_ie_len, 1371 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1372 pwr_level_80211h = 1373 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1374 } 1375 1376 if (cisco_dtpc_ie) { 1377 ieee80211_find_cisco_dtpc( 1378 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1379 has_cisco_pwr = true; 1380 } 1381 1382 if (!has_80211h_pwr && !has_cisco_pwr) 1383 return 0; 1384 1385 /* If we have both 802.11h and Cisco DTPC, apply both limits 1386 * by picking the smallest of the two power levels advertised. 1387 */ 1388 if (has_80211h_pwr && 1389 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1390 sdata_dbg(sdata, 1391 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1392 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1393 sdata->u.mgd.bssid); 1394 new_ap_level = pwr_level_80211h; 1395 } else { /* has_cisco_pwr is always true here. */ 1396 sdata_dbg(sdata, 1397 "Limiting TX power to %d dBm as advertised by %pM\n", 1398 pwr_level_cisco, sdata->u.mgd.bssid); 1399 new_ap_level = pwr_level_cisco; 1400 } 1401 1402 if (sdata->ap_power_level == new_ap_level) 1403 return 0; 1404 1405 sdata->ap_power_level = new_ap_level; 1406 if (__ieee80211_recalc_txpower(sdata)) 1407 return BSS_CHANGED_TXPOWER; 1408 return 0; 1409 } 1410 1411 /* powersave */ 1412 static void ieee80211_enable_ps(struct ieee80211_local *local, 1413 struct ieee80211_sub_if_data *sdata) 1414 { 1415 struct ieee80211_conf *conf = &local->hw.conf; 1416 1417 /* 1418 * If we are scanning right now then the parameters will 1419 * take effect when scan finishes. 1420 */ 1421 if (local->scanning) 1422 return; 1423 1424 if (conf->dynamic_ps_timeout > 0 && 1425 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1426 mod_timer(&local->dynamic_ps_timer, jiffies + 1427 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1428 } else { 1429 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1430 ieee80211_send_nullfunc(local, sdata, 1); 1431 1432 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1433 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1434 return; 1435 1436 conf->flags |= IEEE80211_CONF_PS; 1437 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1438 } 1439 } 1440 1441 static void ieee80211_change_ps(struct ieee80211_local *local) 1442 { 1443 struct ieee80211_conf *conf = &local->hw.conf; 1444 1445 if (local->ps_sdata) { 1446 ieee80211_enable_ps(local, local->ps_sdata); 1447 } else if (conf->flags & IEEE80211_CONF_PS) { 1448 conf->flags &= ~IEEE80211_CONF_PS; 1449 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1450 del_timer_sync(&local->dynamic_ps_timer); 1451 cancel_work_sync(&local->dynamic_ps_enable_work); 1452 } 1453 } 1454 1455 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1456 { 1457 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1458 struct sta_info *sta = NULL; 1459 bool authorized = false; 1460 1461 if (!mgd->powersave) 1462 return false; 1463 1464 if (mgd->broken_ap) 1465 return false; 1466 1467 if (!mgd->associated) 1468 return false; 1469 1470 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1471 return false; 1472 1473 if (!mgd->have_beacon) 1474 return false; 1475 1476 rcu_read_lock(); 1477 sta = sta_info_get(sdata, mgd->bssid); 1478 if (sta) 1479 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1480 rcu_read_unlock(); 1481 1482 return authorized; 1483 } 1484 1485 /* need to hold RTNL or interface lock */ 1486 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) 1487 { 1488 struct ieee80211_sub_if_data *sdata, *found = NULL; 1489 int count = 0; 1490 int timeout; 1491 1492 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1493 local->ps_sdata = NULL; 1494 return; 1495 } 1496 1497 list_for_each_entry(sdata, &local->interfaces, list) { 1498 if (!ieee80211_sdata_running(sdata)) 1499 continue; 1500 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1501 /* If an AP vif is found, then disable PS 1502 * by setting the count to zero thereby setting 1503 * ps_sdata to NULL. 1504 */ 1505 count = 0; 1506 break; 1507 } 1508 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1509 continue; 1510 found = sdata; 1511 count++; 1512 } 1513 1514 if (count == 1 && ieee80211_powersave_allowed(found)) { 1515 s32 beaconint_us; 1516 1517 if (latency < 0) 1518 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); 1519 1520 beaconint_us = ieee80211_tu_to_usec( 1521 found->vif.bss_conf.beacon_int); 1522 1523 timeout = local->dynamic_ps_forced_timeout; 1524 if (timeout < 0) { 1525 /* 1526 * Go to full PSM if the user configures a very low 1527 * latency requirement. 1528 * The 2000 second value is there for compatibility 1529 * until the PM_QOS_NETWORK_LATENCY is configured 1530 * with real values. 1531 */ 1532 if (latency > (1900 * USEC_PER_MSEC) && 1533 latency != (2000 * USEC_PER_SEC)) 1534 timeout = 0; 1535 else 1536 timeout = 100; 1537 } 1538 local->hw.conf.dynamic_ps_timeout = timeout; 1539 1540 if (beaconint_us > latency) { 1541 local->ps_sdata = NULL; 1542 } else { 1543 int maxslp = 1; 1544 u8 dtimper = found->u.mgd.dtim_period; 1545 1546 /* If the TIM IE is invalid, pretend the value is 1 */ 1547 if (!dtimper) 1548 dtimper = 1; 1549 else if (dtimper > 1) 1550 maxslp = min_t(int, dtimper, 1551 latency / beaconint_us); 1552 1553 local->hw.conf.max_sleep_period = maxslp; 1554 local->hw.conf.ps_dtim_period = dtimper; 1555 local->ps_sdata = found; 1556 } 1557 } else { 1558 local->ps_sdata = NULL; 1559 } 1560 1561 ieee80211_change_ps(local); 1562 } 1563 1564 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1565 { 1566 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1567 1568 if (sdata->vif.bss_conf.ps != ps_allowed) { 1569 sdata->vif.bss_conf.ps = ps_allowed; 1570 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1571 } 1572 } 1573 1574 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1575 { 1576 struct ieee80211_local *local = 1577 container_of(work, struct ieee80211_local, 1578 dynamic_ps_disable_work); 1579 1580 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1581 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1582 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1583 } 1584 1585 ieee80211_wake_queues_by_reason(&local->hw, 1586 IEEE80211_MAX_QUEUE_MAP, 1587 IEEE80211_QUEUE_STOP_REASON_PS, 1588 false); 1589 } 1590 1591 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1592 { 1593 struct ieee80211_local *local = 1594 container_of(work, struct ieee80211_local, 1595 dynamic_ps_enable_work); 1596 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1597 struct ieee80211_if_managed *ifmgd; 1598 unsigned long flags; 1599 int q; 1600 1601 /* can only happen when PS was just disabled anyway */ 1602 if (!sdata) 1603 return; 1604 1605 ifmgd = &sdata->u.mgd; 1606 1607 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1608 return; 1609 1610 if (local->hw.conf.dynamic_ps_timeout > 0) { 1611 /* don't enter PS if TX frames are pending */ 1612 if (drv_tx_frames_pending(local)) { 1613 mod_timer(&local->dynamic_ps_timer, jiffies + 1614 msecs_to_jiffies( 1615 local->hw.conf.dynamic_ps_timeout)); 1616 return; 1617 } 1618 1619 /* 1620 * transmission can be stopped by others which leads to 1621 * dynamic_ps_timer expiry. Postpone the ps timer if it 1622 * is not the actual idle state. 1623 */ 1624 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1625 for (q = 0; q < local->hw.queues; q++) { 1626 if (local->queue_stop_reasons[q]) { 1627 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1628 flags); 1629 mod_timer(&local->dynamic_ps_timer, jiffies + 1630 msecs_to_jiffies( 1631 local->hw.conf.dynamic_ps_timeout)); 1632 return; 1633 } 1634 } 1635 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1636 } 1637 1638 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1639 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1640 if (drv_tx_frames_pending(local)) { 1641 mod_timer(&local->dynamic_ps_timer, jiffies + 1642 msecs_to_jiffies( 1643 local->hw.conf.dynamic_ps_timeout)); 1644 } else { 1645 ieee80211_send_nullfunc(local, sdata, 1); 1646 /* Flush to get the tx status of nullfunc frame */ 1647 ieee80211_flush_queues(local, sdata, false); 1648 } 1649 } 1650 1651 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1652 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1653 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1654 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1655 local->hw.conf.flags |= IEEE80211_CONF_PS; 1656 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1657 } 1658 } 1659 1660 void ieee80211_dynamic_ps_timer(unsigned long data) 1661 { 1662 struct ieee80211_local *local = (void *) data; 1663 1664 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1665 } 1666 1667 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1668 { 1669 struct delayed_work *delayed_work = 1670 container_of(work, struct delayed_work, work); 1671 struct ieee80211_sub_if_data *sdata = 1672 container_of(delayed_work, struct ieee80211_sub_if_data, 1673 dfs_cac_timer_work); 1674 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1675 1676 mutex_lock(&sdata->local->mtx); 1677 if (sdata->wdev.cac_started) { 1678 ieee80211_vif_release_channel(sdata); 1679 cfg80211_cac_event(sdata->dev, &chandef, 1680 NL80211_RADAR_CAC_FINISHED, 1681 GFP_KERNEL); 1682 } 1683 mutex_unlock(&sdata->local->mtx); 1684 } 1685 1686 static bool 1687 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1688 { 1689 struct ieee80211_local *local = sdata->local; 1690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1691 bool ret = false; 1692 int ac; 1693 1694 if (local->hw.queues < IEEE80211_NUM_ACS) 1695 return false; 1696 1697 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1698 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1699 int non_acm_ac; 1700 unsigned long now = jiffies; 1701 1702 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1703 tx_tspec->admitted_time && 1704 time_after(now, tx_tspec->time_slice_start + HZ)) { 1705 tx_tspec->consumed_tx_time = 0; 1706 tx_tspec->time_slice_start = now; 1707 1708 if (tx_tspec->downgraded) 1709 tx_tspec->action = 1710 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1711 } 1712 1713 switch (tx_tspec->action) { 1714 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1715 /* take the original parameters */ 1716 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1717 sdata_err(sdata, 1718 "failed to set TX queue parameters for queue %d\n", 1719 ac); 1720 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1721 tx_tspec->downgraded = false; 1722 ret = true; 1723 break; 1724 case TX_TSPEC_ACTION_DOWNGRADE: 1725 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1726 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1727 ret = true; 1728 break; 1729 } 1730 /* downgrade next lower non-ACM AC */ 1731 for (non_acm_ac = ac + 1; 1732 non_acm_ac < IEEE80211_NUM_ACS; 1733 non_acm_ac++) 1734 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1735 break; 1736 /* The loop will result in using BK even if it requires 1737 * admission control, such configuration makes no sense 1738 * and we have to transmit somehow - the AC selection 1739 * does the same thing. 1740 */ 1741 if (drv_conf_tx(local, sdata, ac, 1742 &sdata->tx_conf[non_acm_ac])) 1743 sdata_err(sdata, 1744 "failed to set TX queue parameters for queue %d\n", 1745 ac); 1746 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1747 ret = true; 1748 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1749 tx_tspec->time_slice_start + HZ - now + 1); 1750 break; 1751 case TX_TSPEC_ACTION_NONE: 1752 /* nothing now */ 1753 break; 1754 } 1755 } 1756 1757 return ret; 1758 } 1759 1760 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1761 { 1762 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1763 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1764 } 1765 1766 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1767 { 1768 struct ieee80211_sub_if_data *sdata; 1769 1770 sdata = container_of(work, struct ieee80211_sub_if_data, 1771 u.mgd.tx_tspec_wk.work); 1772 ieee80211_sta_handle_tspec_ac_params(sdata); 1773 } 1774 1775 /* MLME */ 1776 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1777 struct ieee80211_sub_if_data *sdata, 1778 const u8 *wmm_param, size_t wmm_param_len) 1779 { 1780 struct ieee80211_tx_queue_params params; 1781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1782 size_t left; 1783 int count; 1784 const u8 *pos; 1785 u8 uapsd_queues = 0; 1786 1787 if (!local->ops->conf_tx) 1788 return false; 1789 1790 if (local->hw.queues < IEEE80211_NUM_ACS) 1791 return false; 1792 1793 if (!wmm_param) 1794 return false; 1795 1796 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1797 return false; 1798 1799 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1800 uapsd_queues = ifmgd->uapsd_queues; 1801 1802 count = wmm_param[6] & 0x0f; 1803 if (count == ifmgd->wmm_last_param_set) 1804 return false; 1805 ifmgd->wmm_last_param_set = count; 1806 1807 pos = wmm_param + 8; 1808 left = wmm_param_len - 8; 1809 1810 memset(¶ms, 0, sizeof(params)); 1811 1812 sdata->wmm_acm = 0; 1813 for (; left >= 4; left -= 4, pos += 4) { 1814 int aci = (pos[0] >> 5) & 0x03; 1815 int acm = (pos[0] >> 4) & 0x01; 1816 bool uapsd = false; 1817 int queue; 1818 1819 switch (aci) { 1820 case 1: /* AC_BK */ 1821 queue = 3; 1822 if (acm) 1823 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1824 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1825 uapsd = true; 1826 break; 1827 case 2: /* AC_VI */ 1828 queue = 1; 1829 if (acm) 1830 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1831 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1832 uapsd = true; 1833 break; 1834 case 3: /* AC_VO */ 1835 queue = 0; 1836 if (acm) 1837 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1838 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1839 uapsd = true; 1840 break; 1841 case 0: /* AC_BE */ 1842 default: 1843 queue = 2; 1844 if (acm) 1845 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1846 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1847 uapsd = true; 1848 break; 1849 } 1850 1851 params.aifs = pos[0] & 0x0f; 1852 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1853 params.cw_min = ecw2cw(pos[1] & 0x0f); 1854 params.txop = get_unaligned_le16(pos + 2); 1855 params.acm = acm; 1856 params.uapsd = uapsd; 1857 1858 mlme_dbg(sdata, 1859 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1860 queue, aci, acm, 1861 params.aifs, params.cw_min, params.cw_max, 1862 params.txop, params.uapsd, 1863 ifmgd->tx_tspec[queue].downgraded); 1864 sdata->tx_conf[queue] = params; 1865 if (!ifmgd->tx_tspec[queue].downgraded && 1866 drv_conf_tx(local, sdata, queue, ¶ms)) 1867 sdata_err(sdata, 1868 "failed to set TX queue parameters for queue %d\n", 1869 queue); 1870 } 1871 1872 /* enable WMM or activate new settings */ 1873 sdata->vif.bss_conf.qos = true; 1874 return true; 1875 } 1876 1877 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1878 { 1879 lockdep_assert_held(&sdata->local->mtx); 1880 1881 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1882 ieee80211_run_deferred_scan(sdata->local); 1883 } 1884 1885 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1886 { 1887 mutex_lock(&sdata->local->mtx); 1888 __ieee80211_stop_poll(sdata); 1889 mutex_unlock(&sdata->local->mtx); 1890 } 1891 1892 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1893 u16 capab, bool erp_valid, u8 erp) 1894 { 1895 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1896 u32 changed = 0; 1897 bool use_protection; 1898 bool use_short_preamble; 1899 bool use_short_slot; 1900 1901 if (erp_valid) { 1902 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1903 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1904 } else { 1905 use_protection = false; 1906 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1907 } 1908 1909 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1910 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) 1911 use_short_slot = true; 1912 1913 if (use_protection != bss_conf->use_cts_prot) { 1914 bss_conf->use_cts_prot = use_protection; 1915 changed |= BSS_CHANGED_ERP_CTS_PROT; 1916 } 1917 1918 if (use_short_preamble != bss_conf->use_short_preamble) { 1919 bss_conf->use_short_preamble = use_short_preamble; 1920 changed |= BSS_CHANGED_ERP_PREAMBLE; 1921 } 1922 1923 if (use_short_slot != bss_conf->use_short_slot) { 1924 bss_conf->use_short_slot = use_short_slot; 1925 changed |= BSS_CHANGED_ERP_SLOT; 1926 } 1927 1928 return changed; 1929 } 1930 1931 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1932 struct cfg80211_bss *cbss, 1933 u32 bss_info_changed) 1934 { 1935 struct ieee80211_bss *bss = (void *)cbss->priv; 1936 struct ieee80211_local *local = sdata->local; 1937 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1938 1939 bss_info_changed |= BSS_CHANGED_ASSOC; 1940 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1941 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1942 1943 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1944 beacon_loss_count * bss_conf->beacon_int)); 1945 1946 sdata->u.mgd.associated = cbss; 1947 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1948 1949 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1950 1951 if (sdata->vif.p2p) { 1952 const struct cfg80211_bss_ies *ies; 1953 1954 rcu_read_lock(); 1955 ies = rcu_dereference(cbss->ies); 1956 if (ies) { 1957 int ret; 1958 1959 ret = cfg80211_get_p2p_attr( 1960 ies->data, ies->len, 1961 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1962 (u8 *) &bss_conf->p2p_noa_attr, 1963 sizeof(bss_conf->p2p_noa_attr)); 1964 if (ret >= 2) { 1965 sdata->u.mgd.p2p_noa_index = 1966 bss_conf->p2p_noa_attr.index; 1967 bss_info_changed |= BSS_CHANGED_P2P_PS; 1968 } 1969 } 1970 rcu_read_unlock(); 1971 } 1972 1973 /* just to be sure */ 1974 ieee80211_stop_poll(sdata); 1975 1976 ieee80211_led_assoc(local, 1); 1977 1978 if (sdata->u.mgd.have_beacon) { 1979 /* 1980 * If the AP is buggy we may get here with no DTIM period 1981 * known, so assume it's 1 which is the only safe assumption 1982 * in that case, although if the TIM IE is broken powersave 1983 * probably just won't work at all. 1984 */ 1985 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1986 bss_conf->beacon_rate = bss->beacon_rate; 1987 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1988 } else { 1989 bss_conf->beacon_rate = NULL; 1990 bss_conf->dtim_period = 0; 1991 } 1992 1993 bss_conf->assoc = 1; 1994 1995 /* Tell the driver to monitor connection quality (if supported) */ 1996 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1997 bss_conf->cqm_rssi_thold) 1998 bss_info_changed |= BSS_CHANGED_CQM; 1999 2000 /* Enable ARP filtering */ 2001 if (bss_conf->arp_addr_cnt) 2002 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2003 2004 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2005 2006 mutex_lock(&local->iflist_mtx); 2007 ieee80211_recalc_ps(local, -1); 2008 mutex_unlock(&local->iflist_mtx); 2009 2010 ieee80211_recalc_smps(sdata); 2011 ieee80211_recalc_ps_vif(sdata); 2012 2013 netif_carrier_on(sdata->dev); 2014 } 2015 2016 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2017 u16 stype, u16 reason, bool tx, 2018 u8 *frame_buf) 2019 { 2020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2021 struct ieee80211_local *local = sdata->local; 2022 u32 changed = 0; 2023 2024 sdata_assert_lock(sdata); 2025 2026 if (WARN_ON_ONCE(tx && !frame_buf)) 2027 return; 2028 2029 if (WARN_ON(!ifmgd->associated)) 2030 return; 2031 2032 ieee80211_stop_poll(sdata); 2033 2034 ifmgd->associated = NULL; 2035 netif_carrier_off(sdata->dev); 2036 2037 /* 2038 * if we want to get out of ps before disassoc (why?) we have 2039 * to do it before sending disassoc, as otherwise the null-packet 2040 * won't be valid. 2041 */ 2042 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2043 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2044 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2045 } 2046 local->ps_sdata = NULL; 2047 2048 /* disable per-vif ps */ 2049 ieee80211_recalc_ps_vif(sdata); 2050 2051 /* make sure ongoing transmission finishes */ 2052 synchronize_net(); 2053 2054 /* 2055 * drop any frame before deauth/disassoc, this can be data or 2056 * management frame. Since we are disconnecting, we should not 2057 * insist sending these frames which can take time and delay 2058 * the disconnection and possible the roaming. 2059 */ 2060 if (tx) 2061 ieee80211_flush_queues(local, sdata, true); 2062 2063 /* deauthenticate/disassociate now */ 2064 if (tx || frame_buf) 2065 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2066 reason, tx, frame_buf); 2067 2068 /* flush out frame - make sure the deauth was actually sent */ 2069 if (tx) 2070 ieee80211_flush_queues(local, sdata, false); 2071 2072 /* clear bssid only after building the needed mgmt frames */ 2073 eth_zero_addr(ifmgd->bssid); 2074 2075 /* remove AP and TDLS peers */ 2076 sta_info_flush(sdata); 2077 2078 /* finally reset all BSS / config parameters */ 2079 changed |= ieee80211_reset_erp_info(sdata); 2080 2081 ieee80211_led_assoc(local, 0); 2082 changed |= BSS_CHANGED_ASSOC; 2083 sdata->vif.bss_conf.assoc = false; 2084 2085 ifmgd->p2p_noa_index = -1; 2086 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2087 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2088 2089 /* on the next assoc, re-program HT/VHT parameters */ 2090 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2091 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2092 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2093 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2094 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER; 2095 2096 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2097 2098 del_timer_sync(&local->dynamic_ps_timer); 2099 cancel_work_sync(&local->dynamic_ps_enable_work); 2100 2101 /* Disable ARP filtering */ 2102 if (sdata->vif.bss_conf.arp_addr_cnt) 2103 changed |= BSS_CHANGED_ARP_FILTER; 2104 2105 sdata->vif.bss_conf.qos = false; 2106 changed |= BSS_CHANGED_QOS; 2107 2108 /* The BSSID (not really interesting) and HT changed */ 2109 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2110 ieee80211_bss_info_change_notify(sdata, changed); 2111 2112 /* disassociated - set to defaults now */ 2113 ieee80211_set_wmm_default(sdata, false); 2114 2115 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2116 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2117 del_timer_sync(&sdata->u.mgd.timer); 2118 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2119 2120 sdata->vif.bss_conf.dtim_period = 0; 2121 sdata->vif.bss_conf.beacon_rate = NULL; 2122 2123 ifmgd->have_beacon = false; 2124 2125 ifmgd->flags = 0; 2126 mutex_lock(&local->mtx); 2127 ieee80211_vif_release_channel(sdata); 2128 2129 sdata->vif.csa_active = false; 2130 ifmgd->csa_waiting_bcn = false; 2131 ifmgd->csa_ignored_same_chan = false; 2132 if (sdata->csa_block_tx) { 2133 ieee80211_wake_vif_queues(local, sdata, 2134 IEEE80211_QUEUE_STOP_REASON_CSA); 2135 sdata->csa_block_tx = false; 2136 } 2137 mutex_unlock(&local->mtx); 2138 2139 /* existing TX TSPEC sessions no longer exist */ 2140 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2141 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2142 2143 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2144 } 2145 2146 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2147 struct ieee80211_hdr *hdr) 2148 { 2149 /* 2150 * We can postpone the mgd.timer whenever receiving unicast frames 2151 * from AP because we know that the connection is working both ways 2152 * at that time. But multicast frames (and hence also beacons) must 2153 * be ignored here, because we need to trigger the timer during 2154 * data idle periods for sending the periodic probe request to the 2155 * AP we're connected to. 2156 */ 2157 if (is_multicast_ether_addr(hdr->addr1)) 2158 return; 2159 2160 ieee80211_sta_reset_conn_monitor(sdata); 2161 } 2162 2163 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2164 { 2165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2166 struct ieee80211_local *local = sdata->local; 2167 2168 mutex_lock(&local->mtx); 2169 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2170 goto out; 2171 2172 __ieee80211_stop_poll(sdata); 2173 2174 mutex_lock(&local->iflist_mtx); 2175 ieee80211_recalc_ps(local, -1); 2176 mutex_unlock(&local->iflist_mtx); 2177 2178 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2179 goto out; 2180 2181 /* 2182 * We've received a probe response, but are not sure whether 2183 * we have or will be receiving any beacons or data, so let's 2184 * schedule the timers again, just in case. 2185 */ 2186 ieee80211_sta_reset_beacon_monitor(sdata); 2187 2188 mod_timer(&ifmgd->conn_mon_timer, 2189 round_jiffies_up(jiffies + 2190 IEEE80211_CONNECTION_IDLE_TIME)); 2191 out: 2192 mutex_unlock(&local->mtx); 2193 } 2194 2195 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2196 struct ieee80211_hdr *hdr, 2197 u16 tx_time) 2198 { 2199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2200 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 2201 int ac = ieee80211_ac_from_tid(tid); 2202 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2203 unsigned long now = jiffies; 2204 2205 if (likely(!tx_tspec->admitted_time)) 2206 return; 2207 2208 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2209 tx_tspec->consumed_tx_time = 0; 2210 tx_tspec->time_slice_start = now; 2211 2212 if (tx_tspec->downgraded) { 2213 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2214 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2215 } 2216 } 2217 2218 if (tx_tspec->downgraded) 2219 return; 2220 2221 tx_tspec->consumed_tx_time += tx_time; 2222 2223 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2224 tx_tspec->downgraded = true; 2225 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2226 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2227 } 2228 } 2229 2230 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2231 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2232 { 2233 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2234 2235 if (!ieee80211_is_data(hdr->frame_control)) 2236 return; 2237 2238 if (ieee80211_is_nullfunc(hdr->frame_control) && 2239 sdata->u.mgd.probe_send_count > 0) { 2240 if (ack) 2241 ieee80211_sta_reset_conn_monitor(sdata); 2242 else 2243 sdata->u.mgd.nullfunc_failed = true; 2244 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2245 return; 2246 } 2247 2248 if (ack) 2249 ieee80211_sta_reset_conn_monitor(sdata); 2250 } 2251 2252 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2253 { 2254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2255 const u8 *ssid; 2256 u8 *dst = ifmgd->associated->bssid; 2257 u8 unicast_limit = max(1, max_probe_tries - 3); 2258 2259 /* 2260 * Try sending broadcast probe requests for the last three 2261 * probe requests after the first ones failed since some 2262 * buggy APs only support broadcast probe requests. 2263 */ 2264 if (ifmgd->probe_send_count >= unicast_limit) 2265 dst = NULL; 2266 2267 /* 2268 * When the hardware reports an accurate Tx ACK status, it's 2269 * better to send a nullfunc frame instead of a probe request, 2270 * as it will kick us off the AP quickly if we aren't associated 2271 * anymore. The timeout will be reset if the frame is ACKed by 2272 * the AP. 2273 */ 2274 ifmgd->probe_send_count++; 2275 2276 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2277 ifmgd->nullfunc_failed = false; 2278 ieee80211_send_nullfunc(sdata->local, sdata, 0); 2279 } else { 2280 int ssid_len; 2281 2282 rcu_read_lock(); 2283 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2284 if (WARN_ON_ONCE(ssid == NULL)) 2285 ssid_len = 0; 2286 else 2287 ssid_len = ssid[1]; 2288 2289 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2290 ssid + 2, ssid_len, NULL, 2291 0, (u32) -1, true, 0, 2292 ifmgd->associated->channel, false); 2293 rcu_read_unlock(); 2294 } 2295 2296 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2297 run_again(sdata, ifmgd->probe_timeout); 2298 } 2299 2300 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2301 bool beacon) 2302 { 2303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2304 bool already = false; 2305 2306 if (!ieee80211_sdata_running(sdata)) 2307 return; 2308 2309 sdata_lock(sdata); 2310 2311 if (!ifmgd->associated) 2312 goto out; 2313 2314 mutex_lock(&sdata->local->mtx); 2315 2316 if (sdata->local->tmp_channel || sdata->local->scanning) { 2317 mutex_unlock(&sdata->local->mtx); 2318 goto out; 2319 } 2320 2321 if (beacon) { 2322 mlme_dbg_ratelimited(sdata, 2323 "detected beacon loss from AP (missed %d beacons) - probing\n", 2324 beacon_loss_count); 2325 2326 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2327 } 2328 2329 /* 2330 * The driver/our work has already reported this event or the 2331 * connection monitoring has kicked in and we have already sent 2332 * a probe request. Or maybe the AP died and the driver keeps 2333 * reporting until we disassociate... 2334 * 2335 * In either case we have to ignore the current call to this 2336 * function (except for setting the correct probe reason bit) 2337 * because otherwise we would reset the timer every time and 2338 * never check whether we received a probe response! 2339 */ 2340 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2341 already = true; 2342 2343 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2344 2345 mutex_unlock(&sdata->local->mtx); 2346 2347 if (already) 2348 goto out; 2349 2350 mutex_lock(&sdata->local->iflist_mtx); 2351 ieee80211_recalc_ps(sdata->local, -1); 2352 mutex_unlock(&sdata->local->iflist_mtx); 2353 2354 ifmgd->probe_send_count = 0; 2355 ieee80211_mgd_probe_ap_send(sdata); 2356 out: 2357 sdata_unlock(sdata); 2358 } 2359 2360 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2361 struct ieee80211_vif *vif) 2362 { 2363 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2365 struct cfg80211_bss *cbss; 2366 struct sk_buff *skb; 2367 const u8 *ssid; 2368 int ssid_len; 2369 2370 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2371 return NULL; 2372 2373 sdata_assert_lock(sdata); 2374 2375 if (ifmgd->associated) 2376 cbss = ifmgd->associated; 2377 else if (ifmgd->auth_data) 2378 cbss = ifmgd->auth_data->bss; 2379 else if (ifmgd->assoc_data) 2380 cbss = ifmgd->assoc_data->bss; 2381 else 2382 return NULL; 2383 2384 rcu_read_lock(); 2385 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2386 if (WARN_ON_ONCE(ssid == NULL)) 2387 ssid_len = 0; 2388 else 2389 ssid_len = ssid[1]; 2390 2391 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2392 (u32) -1, cbss->channel, 2393 ssid + 2, ssid_len, 2394 NULL, 0, true); 2395 rcu_read_unlock(); 2396 2397 return skb; 2398 } 2399 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2400 2401 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2402 const u8 *buf, size_t len, bool tx, 2403 u16 reason) 2404 { 2405 struct ieee80211_event event = { 2406 .type = MLME_EVENT, 2407 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2408 .u.mlme.reason = reason, 2409 }; 2410 2411 if (tx) 2412 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2413 else 2414 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2415 2416 drv_event_callback(sdata->local, sdata, &event); 2417 } 2418 2419 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2420 { 2421 struct ieee80211_local *local = sdata->local; 2422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2423 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2424 2425 sdata_lock(sdata); 2426 if (!ifmgd->associated) { 2427 sdata_unlock(sdata); 2428 return; 2429 } 2430 2431 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2433 true, frame_buf); 2434 mutex_lock(&local->mtx); 2435 sdata->vif.csa_active = false; 2436 ifmgd->csa_waiting_bcn = false; 2437 if (sdata->csa_block_tx) { 2438 ieee80211_wake_vif_queues(local, sdata, 2439 IEEE80211_QUEUE_STOP_REASON_CSA); 2440 sdata->csa_block_tx = false; 2441 } 2442 mutex_unlock(&local->mtx); 2443 2444 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2445 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2446 2447 sdata_unlock(sdata); 2448 } 2449 2450 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2451 { 2452 struct ieee80211_sub_if_data *sdata = 2453 container_of(work, struct ieee80211_sub_if_data, 2454 u.mgd.beacon_connection_loss_work); 2455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2456 struct sta_info *sta; 2457 2458 if (ifmgd->associated) { 2459 rcu_read_lock(); 2460 sta = sta_info_get(sdata, ifmgd->bssid); 2461 if (sta) 2462 sta->beacon_loss_count++; 2463 rcu_read_unlock(); 2464 } 2465 2466 if (ifmgd->connection_loss) { 2467 sdata_info(sdata, "Connection to AP %pM lost\n", 2468 ifmgd->bssid); 2469 __ieee80211_disconnect(sdata); 2470 } else { 2471 ieee80211_mgd_probe_ap(sdata, true); 2472 } 2473 } 2474 2475 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2476 { 2477 struct ieee80211_sub_if_data *sdata = 2478 container_of(work, struct ieee80211_sub_if_data, 2479 u.mgd.csa_connection_drop_work); 2480 2481 __ieee80211_disconnect(sdata); 2482 } 2483 2484 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2485 { 2486 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2487 struct ieee80211_hw *hw = &sdata->local->hw; 2488 2489 trace_api_beacon_loss(sdata); 2490 2491 sdata->u.mgd.connection_loss = false; 2492 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2493 } 2494 EXPORT_SYMBOL(ieee80211_beacon_loss); 2495 2496 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2497 { 2498 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2499 struct ieee80211_hw *hw = &sdata->local->hw; 2500 2501 trace_api_connection_loss(sdata); 2502 2503 sdata->u.mgd.connection_loss = true; 2504 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2505 } 2506 EXPORT_SYMBOL(ieee80211_connection_loss); 2507 2508 2509 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2510 bool assoc) 2511 { 2512 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2513 2514 sdata_assert_lock(sdata); 2515 2516 if (!assoc) { 2517 /* 2518 * we are not authenticated yet, the only timer that could be 2519 * running is the timeout for the authentication response which 2520 * which is not relevant anymore. 2521 */ 2522 del_timer_sync(&sdata->u.mgd.timer); 2523 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2524 2525 eth_zero_addr(sdata->u.mgd.bssid); 2526 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2527 sdata->u.mgd.flags = 0; 2528 mutex_lock(&sdata->local->mtx); 2529 ieee80211_vif_release_channel(sdata); 2530 mutex_unlock(&sdata->local->mtx); 2531 } 2532 2533 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2534 kfree(auth_data); 2535 sdata->u.mgd.auth_data = NULL; 2536 } 2537 2538 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2539 bool assoc) 2540 { 2541 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2542 2543 sdata_assert_lock(sdata); 2544 2545 if (!assoc) { 2546 /* 2547 * we are not associated yet, the only timer that could be 2548 * running is the timeout for the association response which 2549 * which is not relevant anymore. 2550 */ 2551 del_timer_sync(&sdata->u.mgd.timer); 2552 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2553 2554 eth_zero_addr(sdata->u.mgd.bssid); 2555 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2556 sdata->u.mgd.flags = 0; 2557 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER; 2558 mutex_lock(&sdata->local->mtx); 2559 ieee80211_vif_release_channel(sdata); 2560 mutex_unlock(&sdata->local->mtx); 2561 } 2562 2563 kfree(assoc_data); 2564 sdata->u.mgd.assoc_data = NULL; 2565 } 2566 2567 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2568 struct ieee80211_mgmt *mgmt, size_t len) 2569 { 2570 struct ieee80211_local *local = sdata->local; 2571 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2572 u8 *pos; 2573 struct ieee802_11_elems elems; 2574 u32 tx_flags = 0; 2575 2576 pos = mgmt->u.auth.variable; 2577 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2578 if (!elems.challenge) 2579 return; 2580 auth_data->expected_transaction = 4; 2581 drv_mgd_prepare_tx(sdata->local, sdata); 2582 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2583 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2584 IEEE80211_TX_INTFL_MLME_CONN_TX; 2585 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2586 elems.challenge - 2, elems.challenge_len + 2, 2587 auth_data->bss->bssid, auth_data->bss->bssid, 2588 auth_data->key, auth_data->key_len, 2589 auth_data->key_idx, tx_flags); 2590 } 2591 2592 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2593 struct ieee80211_mgmt *mgmt, size_t len) 2594 { 2595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2596 u8 bssid[ETH_ALEN]; 2597 u16 auth_alg, auth_transaction, status_code; 2598 struct sta_info *sta; 2599 struct ieee80211_event event = { 2600 .type = MLME_EVENT, 2601 .u.mlme.data = AUTH_EVENT, 2602 }; 2603 2604 sdata_assert_lock(sdata); 2605 2606 if (len < 24 + 6) 2607 return; 2608 2609 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2610 return; 2611 2612 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2613 2614 if (!ether_addr_equal(bssid, mgmt->bssid)) 2615 return; 2616 2617 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2618 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2619 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2620 2621 if (auth_alg != ifmgd->auth_data->algorithm || 2622 auth_transaction != ifmgd->auth_data->expected_transaction) { 2623 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2624 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2625 auth_transaction, 2626 ifmgd->auth_data->expected_transaction); 2627 return; 2628 } 2629 2630 if (status_code != WLAN_STATUS_SUCCESS) { 2631 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2632 mgmt->sa, status_code); 2633 ieee80211_destroy_auth_data(sdata, false); 2634 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2635 event.u.mlme.status = MLME_DENIED; 2636 event.u.mlme.reason = status_code; 2637 drv_event_callback(sdata->local, sdata, &event); 2638 return; 2639 } 2640 2641 switch (ifmgd->auth_data->algorithm) { 2642 case WLAN_AUTH_OPEN: 2643 case WLAN_AUTH_LEAP: 2644 case WLAN_AUTH_FT: 2645 case WLAN_AUTH_SAE: 2646 break; 2647 case WLAN_AUTH_SHARED_KEY: 2648 if (ifmgd->auth_data->expected_transaction != 4) { 2649 ieee80211_auth_challenge(sdata, mgmt, len); 2650 /* need another frame */ 2651 return; 2652 } 2653 break; 2654 default: 2655 WARN_ONCE(1, "invalid auth alg %d", 2656 ifmgd->auth_data->algorithm); 2657 return; 2658 } 2659 2660 event.u.mlme.status = MLME_SUCCESS; 2661 drv_event_callback(sdata->local, sdata, &event); 2662 sdata_info(sdata, "authenticated\n"); 2663 ifmgd->auth_data->done = true; 2664 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2665 ifmgd->auth_data->timeout_started = true; 2666 run_again(sdata, ifmgd->auth_data->timeout); 2667 2668 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2669 ifmgd->auth_data->expected_transaction != 2) { 2670 /* 2671 * Report auth frame to user space for processing since another 2672 * round of Authentication frames is still needed. 2673 */ 2674 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2675 return; 2676 } 2677 2678 /* move station state to auth */ 2679 mutex_lock(&sdata->local->sta_mtx); 2680 sta = sta_info_get(sdata, bssid); 2681 if (!sta) { 2682 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2683 goto out_err; 2684 } 2685 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2686 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2687 goto out_err; 2688 } 2689 mutex_unlock(&sdata->local->sta_mtx); 2690 2691 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2692 return; 2693 out_err: 2694 mutex_unlock(&sdata->local->sta_mtx); 2695 /* ignore frame -- wait for timeout */ 2696 } 2697 2698 #define case_WLAN(type) \ 2699 case WLAN_REASON_##type: return #type 2700 2701 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2702 { 2703 switch (reason_code) { 2704 case_WLAN(UNSPECIFIED); 2705 case_WLAN(PREV_AUTH_NOT_VALID); 2706 case_WLAN(DEAUTH_LEAVING); 2707 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2708 case_WLAN(DISASSOC_AP_BUSY); 2709 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2710 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2711 case_WLAN(DISASSOC_STA_HAS_LEFT); 2712 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2713 case_WLAN(DISASSOC_BAD_POWER); 2714 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2715 case_WLAN(INVALID_IE); 2716 case_WLAN(MIC_FAILURE); 2717 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2718 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2719 case_WLAN(IE_DIFFERENT); 2720 case_WLAN(INVALID_GROUP_CIPHER); 2721 case_WLAN(INVALID_PAIRWISE_CIPHER); 2722 case_WLAN(INVALID_AKMP); 2723 case_WLAN(UNSUPP_RSN_VERSION); 2724 case_WLAN(INVALID_RSN_IE_CAP); 2725 case_WLAN(IEEE8021X_FAILED); 2726 case_WLAN(CIPHER_SUITE_REJECTED); 2727 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2728 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2729 case_WLAN(DISASSOC_LOW_ACK); 2730 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2731 case_WLAN(QSTA_LEAVE_QBSS); 2732 case_WLAN(QSTA_NOT_USE); 2733 case_WLAN(QSTA_REQUIRE_SETUP); 2734 case_WLAN(QSTA_TIMEOUT); 2735 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2736 case_WLAN(MESH_PEER_CANCELED); 2737 case_WLAN(MESH_MAX_PEERS); 2738 case_WLAN(MESH_CONFIG); 2739 case_WLAN(MESH_CLOSE); 2740 case_WLAN(MESH_MAX_RETRIES); 2741 case_WLAN(MESH_CONFIRM_TIMEOUT); 2742 case_WLAN(MESH_INVALID_GTK); 2743 case_WLAN(MESH_INCONSISTENT_PARAM); 2744 case_WLAN(MESH_INVALID_SECURITY); 2745 case_WLAN(MESH_PATH_ERROR); 2746 case_WLAN(MESH_PATH_NOFORWARD); 2747 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2748 case_WLAN(MAC_EXISTS_IN_MBSS); 2749 case_WLAN(MESH_CHAN_REGULATORY); 2750 case_WLAN(MESH_CHAN); 2751 default: return "<unknown>"; 2752 } 2753 } 2754 2755 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2756 struct ieee80211_mgmt *mgmt, size_t len) 2757 { 2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2759 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2760 2761 sdata_assert_lock(sdata); 2762 2763 if (len < 24 + 2) 2764 return; 2765 2766 if (ifmgd->associated && 2767 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2768 const u8 *bssid = ifmgd->associated->bssid; 2769 2770 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2771 bssid, reason_code, 2772 ieee80211_get_reason_code_string(reason_code)); 2773 2774 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2775 2776 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2777 reason_code); 2778 return; 2779 } 2780 2781 if (ifmgd->assoc_data && 2782 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2783 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2784 2785 sdata_info(sdata, 2786 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2787 bssid, reason_code, 2788 ieee80211_get_reason_code_string(reason_code)); 2789 2790 ieee80211_destroy_assoc_data(sdata, false); 2791 2792 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2793 return; 2794 } 2795 } 2796 2797 2798 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2799 struct ieee80211_mgmt *mgmt, size_t len) 2800 { 2801 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2802 u16 reason_code; 2803 2804 sdata_assert_lock(sdata); 2805 2806 if (len < 24 + 2) 2807 return; 2808 2809 if (!ifmgd->associated || 2810 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2811 return; 2812 2813 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2814 2815 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", 2816 mgmt->sa, reason_code); 2817 2818 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2819 2820 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2821 } 2822 2823 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2824 u8 *supp_rates, unsigned int supp_rates_len, 2825 u32 *rates, u32 *basic_rates, 2826 bool *have_higher_than_11mbit, 2827 int *min_rate, int *min_rate_index, 2828 int shift, u32 rate_flags) 2829 { 2830 int i, j; 2831 2832 for (i = 0; i < supp_rates_len; i++) { 2833 int rate = supp_rates[i] & 0x7f; 2834 bool is_basic = !!(supp_rates[i] & 0x80); 2835 2836 if ((rate * 5 * (1 << shift)) > 110) 2837 *have_higher_than_11mbit = true; 2838 2839 /* 2840 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 2841 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. 2842 * 2843 * Note: Even through the membership selector and the basic 2844 * rate flag share the same bit, they are not exactly 2845 * the same. 2846 */ 2847 if (!!(supp_rates[i] & 0x80) && 2848 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2849 continue; 2850 2851 for (j = 0; j < sband->n_bitrates; j++) { 2852 struct ieee80211_rate *br; 2853 int brate; 2854 2855 br = &sband->bitrates[j]; 2856 if ((rate_flags & br->flags) != rate_flags) 2857 continue; 2858 2859 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2860 if (brate == rate) { 2861 *rates |= BIT(j); 2862 if (is_basic) 2863 *basic_rates |= BIT(j); 2864 if ((rate * 5) < *min_rate) { 2865 *min_rate = rate * 5; 2866 *min_rate_index = j; 2867 } 2868 break; 2869 } 2870 } 2871 } 2872 } 2873 2874 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2875 struct cfg80211_bss *cbss, 2876 struct ieee80211_mgmt *mgmt, size_t len) 2877 { 2878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2879 struct ieee80211_local *local = sdata->local; 2880 struct ieee80211_supported_band *sband; 2881 struct sta_info *sta; 2882 u8 *pos; 2883 u16 capab_info, aid; 2884 struct ieee802_11_elems elems; 2885 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2886 const struct cfg80211_bss_ies *bss_ies = NULL; 2887 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2888 u32 changed = 0; 2889 int err; 2890 bool ret; 2891 2892 /* AssocResp and ReassocResp have identical structure */ 2893 2894 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2895 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2896 2897 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2898 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2899 aid); 2900 aid &= ~(BIT(15) | BIT(14)); 2901 2902 ifmgd->broken_ap = false; 2903 2904 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2905 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2906 aid); 2907 aid = 0; 2908 ifmgd->broken_ap = true; 2909 } 2910 2911 pos = mgmt->u.assoc_resp.variable; 2912 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2913 2914 if (!elems.supp_rates) { 2915 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2916 return false; 2917 } 2918 2919 ifmgd->aid = aid; 2920 ifmgd->tdls_chan_switch_prohibited = 2921 elems.ext_capab && elems.ext_capab_len >= 5 && 2922 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2923 2924 /* 2925 * Some APs are erroneously not including some information in their 2926 * (re)association response frames. Try to recover by using the data 2927 * from the beacon or probe response. This seems to afflict mobile 2928 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2929 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2930 */ 2931 if ((assoc_data->wmm && !elems.wmm_param) || 2932 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2933 (!elems.ht_cap_elem || !elems.ht_operation)) || 2934 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2935 (!elems.vht_cap_elem || !elems.vht_operation))) { 2936 const struct cfg80211_bss_ies *ies; 2937 struct ieee802_11_elems bss_elems; 2938 2939 rcu_read_lock(); 2940 ies = rcu_dereference(cbss->ies); 2941 if (ies) 2942 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2943 GFP_ATOMIC); 2944 rcu_read_unlock(); 2945 if (!bss_ies) 2946 return false; 2947 2948 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2949 false, &bss_elems); 2950 if (assoc_data->wmm && 2951 !elems.wmm_param && bss_elems.wmm_param) { 2952 elems.wmm_param = bss_elems.wmm_param; 2953 sdata_info(sdata, 2954 "AP bug: WMM param missing from AssocResp\n"); 2955 } 2956 2957 /* 2958 * Also check if we requested HT/VHT, otherwise the AP doesn't 2959 * have to include the IEs in the (re)association response. 2960 */ 2961 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2962 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2963 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2964 sdata_info(sdata, 2965 "AP bug: HT capability missing from AssocResp\n"); 2966 } 2967 if (!elems.ht_operation && bss_elems.ht_operation && 2968 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2969 elems.ht_operation = bss_elems.ht_operation; 2970 sdata_info(sdata, 2971 "AP bug: HT operation missing from AssocResp\n"); 2972 } 2973 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2974 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2975 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2976 sdata_info(sdata, 2977 "AP bug: VHT capa missing from AssocResp\n"); 2978 } 2979 if (!elems.vht_operation && bss_elems.vht_operation && 2980 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2981 elems.vht_operation = bss_elems.vht_operation; 2982 sdata_info(sdata, 2983 "AP bug: VHT operation missing from AssocResp\n"); 2984 } 2985 } 2986 2987 /* 2988 * We previously checked these in the beacon/probe response, so 2989 * they should be present here. This is just a safety net. 2990 */ 2991 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2992 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2993 sdata_info(sdata, 2994 "HT AP is missing WMM params or HT capability/operation\n"); 2995 ret = false; 2996 goto out; 2997 } 2998 2999 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3000 (!elems.vht_cap_elem || !elems.vht_operation)) { 3001 sdata_info(sdata, 3002 "VHT AP is missing VHT capability/operation\n"); 3003 ret = false; 3004 goto out; 3005 } 3006 3007 mutex_lock(&sdata->local->sta_mtx); 3008 /* 3009 * station info was already allocated and inserted before 3010 * the association and should be available to us 3011 */ 3012 sta = sta_info_get(sdata, cbss->bssid); 3013 if (WARN_ON(!sta)) { 3014 mutex_unlock(&sdata->local->sta_mtx); 3015 ret = false; 3016 goto out; 3017 } 3018 3019 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 3020 3021 /* Set up internal HT/VHT capabilities */ 3022 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3023 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3024 elems.ht_cap_elem, sta); 3025 3026 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3027 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3028 elems.vht_cap_elem, sta); 3029 3030 /* 3031 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3032 * in their association response, so ignore that data for our own 3033 * configuration. If it changed since the last beacon, we'll get the 3034 * next beacon and update then. 3035 */ 3036 3037 /* 3038 * If an operating mode notification IE is present, override the 3039 * NSS calculation (that would be done in rate_control_rate_init()) 3040 * and use the # of streams from that element. 3041 */ 3042 if (elems.opmode_notif && 3043 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3044 u8 nss; 3045 3046 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3047 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3048 nss += 1; 3049 sta->sta.rx_nss = nss; 3050 } 3051 3052 rate_control_rate_init(sta); 3053 3054 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) 3055 set_sta_flag(sta, WLAN_STA_MFP); 3056 3057 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3058 3059 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3060 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3061 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3062 if (err) { 3063 sdata_info(sdata, 3064 "failed to move station %pM to desired state\n", 3065 sta->sta.addr); 3066 WARN_ON(__sta_info_destroy(sta)); 3067 mutex_unlock(&sdata->local->sta_mtx); 3068 ret = false; 3069 goto out; 3070 } 3071 3072 mutex_unlock(&sdata->local->sta_mtx); 3073 3074 /* 3075 * Always handle WMM once after association regardless 3076 * of the first value the AP uses. Setting -1 here has 3077 * that effect because the AP values is an unsigned 3078 * 4-bit value. 3079 */ 3080 ifmgd->wmm_last_param_set = -1; 3081 3082 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param) 3083 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3084 elems.wmm_param_len); 3085 else 3086 ieee80211_set_wmm_default(sdata, false); 3087 changed |= BSS_CHANGED_QOS; 3088 3089 /* set AID and assoc capability, 3090 * ieee80211_set_associated() will tell the driver */ 3091 bss_conf->aid = aid; 3092 bss_conf->assoc_capability = capab_info; 3093 ieee80211_set_associated(sdata, cbss, changed); 3094 3095 /* 3096 * If we're using 4-addr mode, let the AP know that we're 3097 * doing so, so that it can create the STA VLAN on its side 3098 */ 3099 if (ifmgd->use_4addr) 3100 ieee80211_send_4addr_nullfunc(local, sdata); 3101 3102 /* 3103 * Start timer to probe the connection to the AP now. 3104 * Also start the timer that will detect beacon loss. 3105 */ 3106 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3107 ieee80211_sta_reset_beacon_monitor(sdata); 3108 3109 ret = true; 3110 out: 3111 kfree(bss_ies); 3112 return ret; 3113 } 3114 3115 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3116 struct ieee80211_mgmt *mgmt, 3117 size_t len) 3118 { 3119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3120 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3121 u16 capab_info, status_code, aid; 3122 struct ieee802_11_elems elems; 3123 int ac, uapsd_queues = -1; 3124 u8 *pos; 3125 bool reassoc; 3126 struct cfg80211_bss *bss; 3127 struct ieee80211_event event = { 3128 .type = MLME_EVENT, 3129 .u.mlme.data = ASSOC_EVENT, 3130 }; 3131 3132 sdata_assert_lock(sdata); 3133 3134 if (!assoc_data) 3135 return; 3136 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3137 return; 3138 3139 /* 3140 * AssocResp and ReassocResp have identical structure, so process both 3141 * of them in this function. 3142 */ 3143 3144 if (len < 24 + 6) 3145 return; 3146 3147 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 3148 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3149 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3150 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3151 3152 sdata_info(sdata, 3153 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3154 reassoc ? "Rea" : "A", mgmt->sa, 3155 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3156 3157 pos = mgmt->u.assoc_resp.variable; 3158 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3159 3160 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3161 elems.timeout_int && 3162 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3163 u32 tu, ms; 3164 tu = le32_to_cpu(elems.timeout_int->value); 3165 ms = tu * 1024 / 1000; 3166 sdata_info(sdata, 3167 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3168 mgmt->sa, tu, ms); 3169 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3170 assoc_data->timeout_started = true; 3171 if (ms > IEEE80211_ASSOC_TIMEOUT) 3172 run_again(sdata, assoc_data->timeout); 3173 return; 3174 } 3175 3176 bss = assoc_data->bss; 3177 3178 if (status_code != WLAN_STATUS_SUCCESS) { 3179 sdata_info(sdata, "%pM denied association (code=%d)\n", 3180 mgmt->sa, status_code); 3181 ieee80211_destroy_assoc_data(sdata, false); 3182 event.u.mlme.status = MLME_DENIED; 3183 event.u.mlme.reason = status_code; 3184 drv_event_callback(sdata->local, sdata, &event); 3185 } else { 3186 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3187 /* oops -- internal error -- send timeout for now */ 3188 ieee80211_destroy_assoc_data(sdata, false); 3189 cfg80211_assoc_timeout(sdata->dev, bss); 3190 return; 3191 } 3192 event.u.mlme.status = MLME_SUCCESS; 3193 drv_event_callback(sdata->local, sdata, &event); 3194 sdata_info(sdata, "associated\n"); 3195 3196 /* 3197 * destroy assoc_data afterwards, as otherwise an idle 3198 * recalc after assoc_data is NULL but before associated 3199 * is set can cause the interface to go idle 3200 */ 3201 ieee80211_destroy_assoc_data(sdata, true); 3202 3203 /* get uapsd queues configuration */ 3204 uapsd_queues = 0; 3205 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3206 if (sdata->tx_conf[ac].uapsd) 3207 uapsd_queues |= BIT(ac); 3208 } 3209 3210 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3211 } 3212 3213 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3214 struct ieee80211_mgmt *mgmt, size_t len, 3215 struct ieee80211_rx_status *rx_status, 3216 struct ieee802_11_elems *elems) 3217 { 3218 struct ieee80211_local *local = sdata->local; 3219 struct ieee80211_bss *bss; 3220 struct ieee80211_channel *channel; 3221 3222 sdata_assert_lock(sdata); 3223 3224 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3225 if (!channel) 3226 return; 3227 3228 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3229 channel); 3230 if (bss) { 3231 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3232 ieee80211_rx_bss_put(local, bss); 3233 } 3234 } 3235 3236 3237 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3238 struct sk_buff *skb) 3239 { 3240 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3241 struct ieee80211_if_managed *ifmgd; 3242 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3243 size_t baselen, len = skb->len; 3244 struct ieee802_11_elems elems; 3245 3246 ifmgd = &sdata->u.mgd; 3247 3248 sdata_assert_lock(sdata); 3249 3250 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3251 return; /* ignore ProbeResp to foreign address */ 3252 3253 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3254 if (baselen > len) 3255 return; 3256 3257 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3258 false, &elems); 3259 3260 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3261 3262 if (ifmgd->associated && 3263 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3264 ieee80211_reset_ap_probe(sdata); 3265 3266 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && 3267 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { 3268 /* got probe response, continue with auth */ 3269 sdata_info(sdata, "direct probe responded\n"); 3270 ifmgd->auth_data->tries = 0; 3271 ifmgd->auth_data->timeout = jiffies; 3272 ifmgd->auth_data->timeout_started = true; 3273 run_again(sdata, ifmgd->auth_data->timeout); 3274 } 3275 } 3276 3277 /* 3278 * This is the canonical list of information elements we care about, 3279 * the filter code also gives us all changes to the Microsoft OUI 3280 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3281 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3282 * changes to requested client power. 3283 * 3284 * We implement beacon filtering in software since that means we can 3285 * avoid processing the frame here and in cfg80211, and userspace 3286 * will not be able to tell whether the hardware supports it or not. 3287 * 3288 * XXX: This list needs to be dynamic -- userspace needs to be able to 3289 * add items it requires. It also needs to be able to tell us to 3290 * look out for other vendor IEs. 3291 */ 3292 static const u64 care_about_ies = 3293 (1ULL << WLAN_EID_COUNTRY) | 3294 (1ULL << WLAN_EID_ERP_INFO) | 3295 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3296 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3297 (1ULL << WLAN_EID_HT_CAPABILITY) | 3298 (1ULL << WLAN_EID_HT_OPERATION) | 3299 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3300 3301 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3302 struct ieee80211_mgmt *mgmt, size_t len, 3303 struct ieee80211_rx_status *rx_status) 3304 { 3305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3306 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3307 size_t baselen; 3308 struct ieee802_11_elems elems; 3309 struct ieee80211_local *local = sdata->local; 3310 struct ieee80211_chanctx_conf *chanctx_conf; 3311 struct ieee80211_channel *chan; 3312 struct sta_info *sta; 3313 u32 changed = 0; 3314 bool erp_valid; 3315 u8 erp_value = 0; 3316 u32 ncrc; 3317 u8 *bssid; 3318 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3319 3320 sdata_assert_lock(sdata); 3321 3322 /* Process beacon from the current BSS */ 3323 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3324 if (baselen > len) 3325 return; 3326 3327 rcu_read_lock(); 3328 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3329 if (!chanctx_conf) { 3330 rcu_read_unlock(); 3331 return; 3332 } 3333 3334 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3335 rcu_read_unlock(); 3336 return; 3337 } 3338 chan = chanctx_conf->def.chan; 3339 rcu_read_unlock(); 3340 3341 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3342 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3343 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3344 len - baselen, false, &elems); 3345 3346 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3347 if (elems.tim && !elems.parse_error) { 3348 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3349 ifmgd->dtim_period = tim_ie->dtim_period; 3350 } 3351 ifmgd->have_beacon = true; 3352 ifmgd->assoc_data->need_beacon = false; 3353 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3354 sdata->vif.bss_conf.sync_tsf = 3355 le64_to_cpu(mgmt->u.beacon.timestamp); 3356 sdata->vif.bss_conf.sync_device_ts = 3357 rx_status->device_timestamp; 3358 if (elems.tim) 3359 sdata->vif.bss_conf.sync_dtim_count = 3360 elems.tim->dtim_count; 3361 else 3362 sdata->vif.bss_conf.sync_dtim_count = 0; 3363 } 3364 /* continue assoc process */ 3365 ifmgd->assoc_data->timeout = jiffies; 3366 ifmgd->assoc_data->timeout_started = true; 3367 run_again(sdata, ifmgd->assoc_data->timeout); 3368 return; 3369 } 3370 3371 if (!ifmgd->associated || 3372 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3373 return; 3374 bssid = ifmgd->associated->bssid; 3375 3376 /* Track average RSSI from the Beacon frames of the current AP */ 3377 ifmgd->last_beacon_signal = rx_status->signal; 3378 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3379 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3380 ifmgd->ave_beacon_signal = rx_status->signal * 16; 3381 ifmgd->last_cqm_event_signal = 0; 3382 ifmgd->count_beacon_signal = 1; 3383 ifmgd->last_ave_beacon_signal = 0; 3384 } else { 3385 ifmgd->ave_beacon_signal = 3386 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + 3387 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * 3388 ifmgd->ave_beacon_signal) / 16; 3389 ifmgd->count_beacon_signal++; 3390 } 3391 3392 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3393 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3394 int sig = ifmgd->ave_beacon_signal; 3395 int last_sig = ifmgd->last_ave_beacon_signal; 3396 struct ieee80211_event event = { 3397 .type = RSSI_EVENT, 3398 }; 3399 3400 /* 3401 * if signal crosses either of the boundaries, invoke callback 3402 * with appropriate parameters 3403 */ 3404 if (sig > ifmgd->rssi_max_thold && 3405 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3406 ifmgd->last_ave_beacon_signal = sig; 3407 event.u.rssi.data = RSSI_EVENT_HIGH; 3408 drv_event_callback(local, sdata, &event); 3409 } else if (sig < ifmgd->rssi_min_thold && 3410 (last_sig >= ifmgd->rssi_max_thold || 3411 last_sig == 0)) { 3412 ifmgd->last_ave_beacon_signal = sig; 3413 event.u.rssi.data = RSSI_EVENT_LOW; 3414 drv_event_callback(local, sdata, &event); 3415 } 3416 } 3417 3418 if (bss_conf->cqm_rssi_thold && 3419 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3420 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3421 int sig = ifmgd->ave_beacon_signal / 16; 3422 int last_event = ifmgd->last_cqm_event_signal; 3423 int thold = bss_conf->cqm_rssi_thold; 3424 int hyst = bss_conf->cqm_rssi_hyst; 3425 if (sig < thold && 3426 (last_event == 0 || sig < last_event - hyst)) { 3427 ifmgd->last_cqm_event_signal = sig; 3428 ieee80211_cqm_rssi_notify( 3429 &sdata->vif, 3430 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3431 GFP_KERNEL); 3432 } else if (sig > thold && 3433 (last_event == 0 || sig > last_event + hyst)) { 3434 ifmgd->last_cqm_event_signal = sig; 3435 ieee80211_cqm_rssi_notify( 3436 &sdata->vif, 3437 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3438 GFP_KERNEL); 3439 } 3440 } 3441 3442 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3443 mlme_dbg_ratelimited(sdata, 3444 "cancelling AP probe due to a received beacon\n"); 3445 ieee80211_reset_ap_probe(sdata); 3446 } 3447 3448 /* 3449 * Push the beacon loss detection into the future since 3450 * we are processing a beacon from the AP just now. 3451 */ 3452 ieee80211_sta_reset_beacon_monitor(sdata); 3453 3454 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3455 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3456 len - baselen, false, &elems, 3457 care_about_ies, ncrc); 3458 3459 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) { 3460 bool directed_tim = ieee80211_check_tim(elems.tim, 3461 elems.tim_len, 3462 ifmgd->aid); 3463 if (directed_tim) { 3464 if (local->hw.conf.dynamic_ps_timeout > 0) { 3465 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3466 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3467 ieee80211_hw_config(local, 3468 IEEE80211_CONF_CHANGE_PS); 3469 } 3470 ieee80211_send_nullfunc(local, sdata, 0); 3471 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3472 local->pspolling = true; 3473 3474 /* 3475 * Here is assumed that the driver will be 3476 * able to send ps-poll frame and receive a 3477 * response even though power save mode is 3478 * enabled, but some drivers might require 3479 * to disable power save here. This needs 3480 * to be investigated. 3481 */ 3482 ieee80211_send_pspoll(local, sdata); 3483 } 3484 } 3485 } 3486 3487 if (sdata->vif.p2p) { 3488 struct ieee80211_p2p_noa_attr noa = {}; 3489 int ret; 3490 3491 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3492 len - baselen, 3493 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3494 (u8 *) &noa, sizeof(noa)); 3495 if (ret >= 2) { 3496 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3497 /* valid noa_attr and index changed */ 3498 sdata->u.mgd.p2p_noa_index = noa.index; 3499 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3500 changed |= BSS_CHANGED_P2P_PS; 3501 /* 3502 * make sure we update all information, the CRC 3503 * mechanism doesn't look at P2P attributes. 3504 */ 3505 ifmgd->beacon_crc_valid = false; 3506 } 3507 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3508 /* noa_attr not found and we had valid noa_attr before */ 3509 sdata->u.mgd.p2p_noa_index = -1; 3510 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3511 changed |= BSS_CHANGED_P2P_PS; 3512 ifmgd->beacon_crc_valid = false; 3513 } 3514 } 3515 3516 if (ifmgd->csa_waiting_bcn) 3517 ieee80211_chswitch_post_beacon(sdata); 3518 3519 /* 3520 * Update beacon timing and dtim count on every beacon appearance. This 3521 * will allow the driver to use the most updated values. Do it before 3522 * comparing this one with last received beacon. 3523 * IMPORTANT: These parameters would possibly be out of sync by the time 3524 * the driver will use them. The synchronized view is currently 3525 * guaranteed only in certain callbacks. 3526 */ 3527 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3528 sdata->vif.bss_conf.sync_tsf = 3529 le64_to_cpu(mgmt->u.beacon.timestamp); 3530 sdata->vif.bss_conf.sync_device_ts = 3531 rx_status->device_timestamp; 3532 if (elems.tim) 3533 sdata->vif.bss_conf.sync_dtim_count = 3534 elems.tim->dtim_count; 3535 else 3536 sdata->vif.bss_conf.sync_dtim_count = 0; 3537 } 3538 3539 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3540 return; 3541 ifmgd->beacon_crc = ncrc; 3542 ifmgd->beacon_crc_valid = true; 3543 3544 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3545 3546 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3547 rx_status->device_timestamp, 3548 &elems, true); 3549 3550 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3551 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3552 elems.wmm_param_len)) 3553 changed |= BSS_CHANGED_QOS; 3554 3555 /* 3556 * If we haven't had a beacon before, tell the driver about the 3557 * DTIM period (and beacon timing if desired) now. 3558 */ 3559 if (!ifmgd->have_beacon) { 3560 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3561 if (elems.tim) 3562 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3563 else 3564 bss_conf->dtim_period = 1; 3565 3566 changed |= BSS_CHANGED_BEACON_INFO; 3567 ifmgd->have_beacon = true; 3568 3569 mutex_lock(&local->iflist_mtx); 3570 ieee80211_recalc_ps(local, -1); 3571 mutex_unlock(&local->iflist_mtx); 3572 3573 ieee80211_recalc_ps_vif(sdata); 3574 } 3575 3576 if (elems.erp_info) { 3577 erp_valid = true; 3578 erp_value = elems.erp_info[0]; 3579 } else { 3580 erp_valid = false; 3581 } 3582 changed |= ieee80211_handle_bss_capability(sdata, 3583 le16_to_cpu(mgmt->u.beacon.capab_info), 3584 erp_valid, erp_value); 3585 3586 mutex_lock(&local->sta_mtx); 3587 sta = sta_info_get(sdata, bssid); 3588 3589 if (ieee80211_config_bw(sdata, sta, 3590 elems.ht_cap_elem, elems.ht_operation, 3591 elems.vht_operation, bssid, &changed)) { 3592 mutex_unlock(&local->sta_mtx); 3593 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3594 WLAN_REASON_DEAUTH_LEAVING, 3595 true, deauth_buf); 3596 ieee80211_report_disconnect(sdata, deauth_buf, 3597 sizeof(deauth_buf), true, 3598 WLAN_REASON_DEAUTH_LEAVING); 3599 return; 3600 } 3601 3602 if (sta && elems.opmode_notif) 3603 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3604 rx_status->band, true); 3605 mutex_unlock(&local->sta_mtx); 3606 3607 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3608 elems.country_elem, 3609 elems.country_elem_len, 3610 elems.pwr_constr_elem, 3611 elems.cisco_dtpc_elem); 3612 3613 ieee80211_bss_info_change_notify(sdata, changed); 3614 } 3615 3616 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3617 struct sk_buff *skb) 3618 { 3619 struct ieee80211_rx_status *rx_status; 3620 struct ieee80211_mgmt *mgmt; 3621 u16 fc; 3622 struct ieee802_11_elems elems; 3623 int ies_len; 3624 3625 rx_status = (struct ieee80211_rx_status *) skb->cb; 3626 mgmt = (struct ieee80211_mgmt *) skb->data; 3627 fc = le16_to_cpu(mgmt->frame_control); 3628 3629 sdata_lock(sdata); 3630 3631 switch (fc & IEEE80211_FCTL_STYPE) { 3632 case IEEE80211_STYPE_BEACON: 3633 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3634 break; 3635 case IEEE80211_STYPE_PROBE_RESP: 3636 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3637 break; 3638 case IEEE80211_STYPE_AUTH: 3639 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3640 break; 3641 case IEEE80211_STYPE_DEAUTH: 3642 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3643 break; 3644 case IEEE80211_STYPE_DISASSOC: 3645 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3646 break; 3647 case IEEE80211_STYPE_ASSOC_RESP: 3648 case IEEE80211_STYPE_REASSOC_RESP: 3649 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3650 break; 3651 case IEEE80211_STYPE_ACTION: 3652 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3653 ies_len = skb->len - 3654 offsetof(struct ieee80211_mgmt, 3655 u.action.u.chan_switch.variable); 3656 3657 if (ies_len < 0) 3658 break; 3659 3660 ieee802_11_parse_elems( 3661 mgmt->u.action.u.chan_switch.variable, 3662 ies_len, true, &elems); 3663 3664 if (elems.parse_error) 3665 break; 3666 3667 ieee80211_sta_process_chanswitch(sdata, 3668 rx_status->mactime, 3669 rx_status->device_timestamp, 3670 &elems, false); 3671 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3672 ies_len = skb->len - 3673 offsetof(struct ieee80211_mgmt, 3674 u.action.u.ext_chan_switch.variable); 3675 3676 if (ies_len < 0) 3677 break; 3678 3679 ieee802_11_parse_elems( 3680 mgmt->u.action.u.ext_chan_switch.variable, 3681 ies_len, true, &elems); 3682 3683 if (elems.parse_error) 3684 break; 3685 3686 /* for the handling code pretend this was also an IE */ 3687 elems.ext_chansw_ie = 3688 &mgmt->u.action.u.ext_chan_switch.data; 3689 3690 ieee80211_sta_process_chanswitch(sdata, 3691 rx_status->mactime, 3692 rx_status->device_timestamp, 3693 &elems, false); 3694 } 3695 break; 3696 } 3697 sdata_unlock(sdata); 3698 } 3699 3700 static void ieee80211_sta_timer(unsigned long data) 3701 { 3702 struct ieee80211_sub_if_data *sdata = 3703 (struct ieee80211_sub_if_data *) data; 3704 3705 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3706 } 3707 3708 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3709 u8 *bssid, u8 reason, bool tx) 3710 { 3711 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3712 3713 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3714 tx, frame_buf); 3715 3716 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3717 reason); 3718 } 3719 3720 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) 3721 { 3722 struct ieee80211_local *local = sdata->local; 3723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3724 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3725 u32 tx_flags = 0; 3726 3727 sdata_assert_lock(sdata); 3728 3729 if (WARN_ON_ONCE(!auth_data)) 3730 return -EINVAL; 3731 3732 auth_data->tries++; 3733 3734 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3735 sdata_info(sdata, "authentication with %pM timed out\n", 3736 auth_data->bss->bssid); 3737 3738 /* 3739 * Most likely AP is not in the range so remove the 3740 * bss struct for that AP. 3741 */ 3742 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3743 3744 return -ETIMEDOUT; 3745 } 3746 3747 drv_mgd_prepare_tx(local, sdata); 3748 3749 if (auth_data->bss->proberesp_ies) { 3750 u16 trans = 1; 3751 u16 status = 0; 3752 3753 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3754 auth_data->bss->bssid, auth_data->tries, 3755 IEEE80211_AUTH_MAX_TRIES); 3756 3757 auth_data->expected_transaction = 2; 3758 3759 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3760 trans = auth_data->sae_trans; 3761 status = auth_data->sae_status; 3762 auth_data->expected_transaction = trans; 3763 } 3764 3765 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3766 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3767 IEEE80211_TX_INTFL_MLME_CONN_TX; 3768 3769 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3770 auth_data->data, auth_data->data_len, 3771 auth_data->bss->bssid, 3772 auth_data->bss->bssid, NULL, 0, 0, 3773 tx_flags); 3774 } else { 3775 const u8 *ssidie; 3776 3777 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", 3778 auth_data->bss->bssid, auth_data->tries, 3779 IEEE80211_AUTH_MAX_TRIES); 3780 3781 rcu_read_lock(); 3782 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); 3783 if (!ssidie) { 3784 rcu_read_unlock(); 3785 return -EINVAL; 3786 } 3787 /* 3788 * Direct probe is sent to broadcast address as some APs 3789 * will not answer to direct packet in unassociated state. 3790 */ 3791 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL, 3792 ssidie + 2, ssidie[1], 3793 NULL, 0, (u32) -1, true, 0, 3794 auth_data->bss->channel, false); 3795 rcu_read_unlock(); 3796 } 3797 3798 if (tx_flags == 0) { 3799 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3800 auth_data->timeout_started = true; 3801 run_again(sdata, auth_data->timeout); 3802 } else { 3803 auth_data->timeout = 3804 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3805 auth_data->timeout_started = true; 3806 run_again(sdata, auth_data->timeout); 3807 } 3808 3809 return 0; 3810 } 3811 3812 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3813 { 3814 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3815 struct ieee80211_local *local = sdata->local; 3816 3817 sdata_assert_lock(sdata); 3818 3819 assoc_data->tries++; 3820 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3821 sdata_info(sdata, "association with %pM timed out\n", 3822 assoc_data->bss->bssid); 3823 3824 /* 3825 * Most likely AP is not in the range so remove the 3826 * bss struct for that AP. 3827 */ 3828 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3829 3830 return -ETIMEDOUT; 3831 } 3832 3833 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3834 assoc_data->bss->bssid, assoc_data->tries, 3835 IEEE80211_ASSOC_MAX_TRIES); 3836 ieee80211_send_assoc(sdata); 3837 3838 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3839 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3840 assoc_data->timeout_started = true; 3841 run_again(sdata, assoc_data->timeout); 3842 } else { 3843 assoc_data->timeout = 3844 round_jiffies_up(jiffies + 3845 IEEE80211_ASSOC_TIMEOUT_LONG); 3846 assoc_data->timeout_started = true; 3847 run_again(sdata, assoc_data->timeout); 3848 } 3849 3850 return 0; 3851 } 3852 3853 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3854 __le16 fc, bool acked) 3855 { 3856 struct ieee80211_local *local = sdata->local; 3857 3858 sdata->u.mgd.status_fc = fc; 3859 sdata->u.mgd.status_acked = acked; 3860 sdata->u.mgd.status_received = true; 3861 3862 ieee80211_queue_work(&local->hw, &sdata->work); 3863 } 3864 3865 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3866 { 3867 struct ieee80211_local *local = sdata->local; 3868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3869 3870 sdata_lock(sdata); 3871 3872 if (ifmgd->status_received) { 3873 __le16 fc = ifmgd->status_fc; 3874 bool status_acked = ifmgd->status_acked; 3875 3876 ifmgd->status_received = false; 3877 if (ifmgd->auth_data && 3878 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { 3879 if (status_acked) { 3880 ifmgd->auth_data->timeout = 3881 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3882 run_again(sdata, ifmgd->auth_data->timeout); 3883 } else { 3884 ifmgd->auth_data->timeout = jiffies - 1; 3885 } 3886 ifmgd->auth_data->timeout_started = true; 3887 } else if (ifmgd->assoc_data && 3888 (ieee80211_is_assoc_req(fc) || 3889 ieee80211_is_reassoc_req(fc))) { 3890 if (status_acked) { 3891 ifmgd->assoc_data->timeout = 3892 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3893 run_again(sdata, ifmgd->assoc_data->timeout); 3894 } else { 3895 ifmgd->assoc_data->timeout = jiffies - 1; 3896 } 3897 ifmgd->assoc_data->timeout_started = true; 3898 } 3899 } 3900 3901 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3902 time_after(jiffies, ifmgd->auth_data->timeout)) { 3903 if (ifmgd->auth_data->done) { 3904 /* 3905 * ok ... we waited for assoc but userspace didn't, 3906 * so let's just kill the auth data 3907 */ 3908 ieee80211_destroy_auth_data(sdata, false); 3909 } else if (ieee80211_probe_auth(sdata)) { 3910 u8 bssid[ETH_ALEN]; 3911 struct ieee80211_event event = { 3912 .type = MLME_EVENT, 3913 .u.mlme.data = AUTH_EVENT, 3914 .u.mlme.status = MLME_TIMEOUT, 3915 }; 3916 3917 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3918 3919 ieee80211_destroy_auth_data(sdata, false); 3920 3921 cfg80211_auth_timeout(sdata->dev, bssid); 3922 drv_event_callback(sdata->local, sdata, &event); 3923 } 3924 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3925 run_again(sdata, ifmgd->auth_data->timeout); 3926 3927 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3928 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3929 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3930 ieee80211_do_assoc(sdata)) { 3931 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3932 struct ieee80211_event event = { 3933 .type = MLME_EVENT, 3934 .u.mlme.data = ASSOC_EVENT, 3935 .u.mlme.status = MLME_TIMEOUT, 3936 }; 3937 3938 ieee80211_destroy_assoc_data(sdata, false); 3939 cfg80211_assoc_timeout(sdata->dev, bss); 3940 drv_event_callback(sdata->local, sdata, &event); 3941 } 3942 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3943 run_again(sdata, ifmgd->assoc_data->timeout); 3944 3945 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3946 ifmgd->associated) { 3947 u8 bssid[ETH_ALEN]; 3948 int max_tries; 3949 3950 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3951 3952 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3953 max_tries = max_nullfunc_tries; 3954 else 3955 max_tries = max_probe_tries; 3956 3957 /* ACK received for nullfunc probing frame */ 3958 if (!ifmgd->probe_send_count) 3959 ieee80211_reset_ap_probe(sdata); 3960 else if (ifmgd->nullfunc_failed) { 3961 if (ifmgd->probe_send_count < max_tries) { 3962 mlme_dbg(sdata, 3963 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3964 bssid, ifmgd->probe_send_count, 3965 max_tries); 3966 ieee80211_mgd_probe_ap_send(sdata); 3967 } else { 3968 mlme_dbg(sdata, 3969 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3970 bssid); 3971 ieee80211_sta_connection_lost(sdata, bssid, 3972 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3973 false); 3974 } 3975 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3976 run_again(sdata, ifmgd->probe_timeout); 3977 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3978 mlme_dbg(sdata, 3979 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3980 bssid, probe_wait_ms); 3981 ieee80211_sta_connection_lost(sdata, bssid, 3982 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3983 } else if (ifmgd->probe_send_count < max_tries) { 3984 mlme_dbg(sdata, 3985 "No probe response from AP %pM after %dms, try %d/%i\n", 3986 bssid, probe_wait_ms, 3987 ifmgd->probe_send_count, max_tries); 3988 ieee80211_mgd_probe_ap_send(sdata); 3989 } else { 3990 /* 3991 * We actually lost the connection ... or did we? 3992 * Let's make sure! 3993 */ 3994 wiphy_debug(local->hw.wiphy, 3995 "%s: No probe response from AP %pM" 3996 " after %dms, disconnecting.\n", 3997 sdata->name, 3998 bssid, probe_wait_ms); 3999 4000 ieee80211_sta_connection_lost(sdata, bssid, 4001 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4002 } 4003 } 4004 4005 sdata_unlock(sdata); 4006 } 4007 4008 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 4009 { 4010 struct ieee80211_sub_if_data *sdata = 4011 (struct ieee80211_sub_if_data *) data; 4012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4013 4014 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4015 return; 4016 4017 sdata->u.mgd.connection_loss = false; 4018 ieee80211_queue_work(&sdata->local->hw, 4019 &sdata->u.mgd.beacon_connection_loss_work); 4020 } 4021 4022 static void ieee80211_sta_conn_mon_timer(unsigned long data) 4023 { 4024 struct ieee80211_sub_if_data *sdata = 4025 (struct ieee80211_sub_if_data *) data; 4026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4027 struct ieee80211_local *local = sdata->local; 4028 4029 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4030 return; 4031 4032 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4033 } 4034 4035 static void ieee80211_sta_monitor_work(struct work_struct *work) 4036 { 4037 struct ieee80211_sub_if_data *sdata = 4038 container_of(work, struct ieee80211_sub_if_data, 4039 u.mgd.monitor_work); 4040 4041 ieee80211_mgd_probe_ap(sdata, false); 4042 } 4043 4044 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4045 { 4046 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4047 __ieee80211_stop_poll(sdata); 4048 4049 /* let's probe the connection once */ 4050 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4051 ieee80211_queue_work(&sdata->local->hw, 4052 &sdata->u.mgd.monitor_work); 4053 /* and do all the other regular work too */ 4054 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4055 } 4056 } 4057 4058 #ifdef CONFIG_PM 4059 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4060 { 4061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4062 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4063 4064 sdata_lock(sdata); 4065 4066 if (ifmgd->auth_data || ifmgd->assoc_data) { 4067 const u8 *bssid = ifmgd->auth_data ? 4068 ifmgd->auth_data->bss->bssid : 4069 ifmgd->assoc_data->bss->bssid; 4070 4071 /* 4072 * If we are trying to authenticate / associate while suspending, 4073 * cfg80211 won't know and won't actually abort those attempts, 4074 * thus we need to do that ourselves. 4075 */ 4076 ieee80211_send_deauth_disassoc(sdata, bssid, 4077 IEEE80211_STYPE_DEAUTH, 4078 WLAN_REASON_DEAUTH_LEAVING, 4079 false, frame_buf); 4080 if (ifmgd->assoc_data) 4081 ieee80211_destroy_assoc_data(sdata, false); 4082 if (ifmgd->auth_data) 4083 ieee80211_destroy_auth_data(sdata, false); 4084 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4085 IEEE80211_DEAUTH_FRAME_LEN); 4086 } 4087 4088 /* This is a bit of a hack - we should find a better and more generic 4089 * solution to this. Normally when suspending, cfg80211 will in fact 4090 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4091 * auth (not so important) or assoc (this is the problem) process. 4092 * 4093 * As a consequence, it can happen that we are in the process of both 4094 * associating and suspending, and receive an association response 4095 * after cfg80211 has checked if it needs to disconnect, but before 4096 * we actually set the flag to drop incoming frames. This will then 4097 * cause the workqueue flush to process the association response in 4098 * the suspend, resulting in a successful association just before it 4099 * tries to remove the interface from the driver, which now though 4100 * has a channel context assigned ... this results in issues. 4101 * 4102 * To work around this (for now) simply deauth here again if we're 4103 * now connected. 4104 */ 4105 if (ifmgd->associated && !sdata->local->wowlan) { 4106 u8 bssid[ETH_ALEN]; 4107 struct cfg80211_deauth_request req = { 4108 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4109 .bssid = bssid, 4110 }; 4111 4112 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4113 ieee80211_mgd_deauth(sdata, &req); 4114 } 4115 4116 sdata_unlock(sdata); 4117 } 4118 4119 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4120 { 4121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4122 4123 sdata_lock(sdata); 4124 if (!ifmgd->associated) { 4125 sdata_unlock(sdata); 4126 return; 4127 } 4128 4129 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4130 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4131 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4132 ieee80211_sta_connection_lost(sdata, 4133 ifmgd->associated->bssid, 4134 WLAN_REASON_UNSPECIFIED, 4135 true); 4136 sdata_unlock(sdata); 4137 return; 4138 } 4139 sdata_unlock(sdata); 4140 } 4141 #endif 4142 4143 /* interface setup */ 4144 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4145 { 4146 struct ieee80211_if_managed *ifmgd; 4147 4148 ifmgd = &sdata->u.mgd; 4149 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4150 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4151 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4152 ieee80211_beacon_connection_loss_work); 4153 INIT_WORK(&ifmgd->csa_connection_drop_work, 4154 ieee80211_csa_connection_drop_work); 4155 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4156 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4157 ieee80211_tdls_peer_del_work); 4158 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 4159 (unsigned long) sdata); 4160 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 4161 (unsigned long) sdata); 4162 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 4163 (unsigned long) sdata); 4164 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 4165 (unsigned long) sdata); 4166 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4167 ieee80211_sta_handle_tspec_ac_params_wk); 4168 4169 ifmgd->flags = 0; 4170 ifmgd->powersave = sdata->wdev.ps; 4171 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4172 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4173 ifmgd->p2p_noa_index = -1; 4174 4175 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4176 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4177 else 4178 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4179 4180 /* Setup TDLS data */ 4181 spin_lock_init(&ifmgd->teardown_lock); 4182 ifmgd->teardown_skb = NULL; 4183 ifmgd->orig_teardown_skb = NULL; 4184 } 4185 4186 /* scan finished notification */ 4187 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4188 { 4189 struct ieee80211_sub_if_data *sdata; 4190 4191 /* Restart STA timers */ 4192 rcu_read_lock(); 4193 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4194 if (ieee80211_sdata_running(sdata)) 4195 ieee80211_restart_sta_timer(sdata); 4196 } 4197 rcu_read_unlock(); 4198 } 4199 4200 int ieee80211_max_network_latency(struct notifier_block *nb, 4201 unsigned long data, void *dummy) 4202 { 4203 s32 latency_usec = (s32) data; 4204 struct ieee80211_local *local = 4205 container_of(nb, struct ieee80211_local, 4206 network_latency_notifier); 4207 4208 mutex_lock(&local->iflist_mtx); 4209 ieee80211_recalc_ps(local, latency_usec); 4210 mutex_unlock(&local->iflist_mtx); 4211 4212 return NOTIFY_OK; 4213 } 4214 4215 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4216 struct cfg80211_bss *cbss) 4217 { 4218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4219 const u8 *ht_cap_ie, *vht_cap_ie; 4220 const struct ieee80211_ht_cap *ht_cap; 4221 const struct ieee80211_vht_cap *vht_cap; 4222 u8 chains = 1; 4223 4224 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4225 return chains; 4226 4227 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4228 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4229 ht_cap = (void *)(ht_cap_ie + 2); 4230 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4231 /* 4232 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4233 * "Tx Unequal Modulation Supported" fields. 4234 */ 4235 } 4236 4237 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4238 return chains; 4239 4240 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4241 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4242 u8 nss; 4243 u16 tx_mcs_map; 4244 4245 vht_cap = (void *)(vht_cap_ie + 2); 4246 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4247 for (nss = 8; nss > 0; nss--) { 4248 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4249 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4250 break; 4251 } 4252 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4253 chains = max(chains, nss); 4254 } 4255 4256 return chains; 4257 } 4258 4259 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4260 struct cfg80211_bss *cbss) 4261 { 4262 struct ieee80211_local *local = sdata->local; 4263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4264 const struct ieee80211_ht_cap *ht_cap = NULL; 4265 const struct ieee80211_ht_operation *ht_oper = NULL; 4266 const struct ieee80211_vht_operation *vht_oper = NULL; 4267 struct ieee80211_supported_band *sband; 4268 struct cfg80211_chan_def chandef; 4269 int ret; 4270 u32 i; 4271 bool have_80mhz; 4272 4273 sband = local->hw.wiphy->bands[cbss->channel->band]; 4274 4275 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4276 IEEE80211_STA_DISABLE_80P80MHZ | 4277 IEEE80211_STA_DISABLE_160MHZ); 4278 4279 rcu_read_lock(); 4280 4281 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4282 sband->ht_cap.ht_supported) { 4283 const u8 *ht_oper_ie, *ht_cap_ie; 4284 4285 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4286 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4287 ht_oper = (void *)(ht_oper_ie + 2); 4288 4289 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4290 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4291 ht_cap = (void *)(ht_cap_ie + 2); 4292 4293 if (!ht_cap) { 4294 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4295 ht_oper = NULL; 4296 } 4297 } 4298 4299 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4300 sband->vht_cap.vht_supported) { 4301 const u8 *vht_oper_ie, *vht_cap; 4302 4303 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4304 WLAN_EID_VHT_OPERATION); 4305 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4306 vht_oper = (void *)(vht_oper_ie + 2); 4307 if (vht_oper && !ht_oper) { 4308 vht_oper = NULL; 4309 sdata_info(sdata, 4310 "AP advertised VHT without HT, disabling both\n"); 4311 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4312 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4313 } 4314 4315 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4316 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4317 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4318 vht_oper = NULL; 4319 } 4320 } 4321 4322 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4323 have_80mhz = false; 4324 for (i = 0; i < sband->n_channels; i++) { 4325 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4326 IEEE80211_CHAN_NO_80MHZ)) 4327 continue; 4328 4329 have_80mhz = true; 4330 break; 4331 } 4332 4333 if (!have_80mhz) 4334 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4335 4336 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4337 cbss->channel, 4338 ht_cap, ht_oper, vht_oper, 4339 &chandef, false); 4340 4341 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4342 local->rx_chains); 4343 4344 rcu_read_unlock(); 4345 4346 /* will change later if needed */ 4347 sdata->smps_mode = IEEE80211_SMPS_OFF; 4348 4349 mutex_lock(&local->mtx); 4350 /* 4351 * If this fails (possibly due to channel context sharing 4352 * on incompatible channels, e.g. 80+80 and 160 sharing the 4353 * same control channel) try to use a smaller bandwidth. 4354 */ 4355 ret = ieee80211_vif_use_channel(sdata, &chandef, 4356 IEEE80211_CHANCTX_SHARED); 4357 4358 /* don't downgrade for 5 and 10 MHz channels, though. */ 4359 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4360 chandef.width == NL80211_CHAN_WIDTH_10) 4361 goto out; 4362 4363 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4364 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4365 ret = ieee80211_vif_use_channel(sdata, &chandef, 4366 IEEE80211_CHANCTX_SHARED); 4367 } 4368 out: 4369 mutex_unlock(&local->mtx); 4370 return ret; 4371 } 4372 4373 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4374 struct cfg80211_bss *cbss, bool assoc, 4375 bool override) 4376 { 4377 struct ieee80211_local *local = sdata->local; 4378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4379 struct ieee80211_bss *bss = (void *)cbss->priv; 4380 struct sta_info *new_sta = NULL; 4381 struct ieee80211_supported_band *sband; 4382 bool have_sta = false; 4383 int err; 4384 4385 sband = local->hw.wiphy->bands[cbss->channel->band]; 4386 4387 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4388 return -EINVAL; 4389 4390 if (assoc) { 4391 rcu_read_lock(); 4392 have_sta = sta_info_get(sdata, cbss->bssid); 4393 rcu_read_unlock(); 4394 } 4395 4396 if (!have_sta) { 4397 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4398 if (!new_sta) 4399 return -ENOMEM; 4400 } 4401 4402 if (new_sta || override) { 4403 err = ieee80211_prep_channel(sdata, cbss); 4404 if (err) { 4405 if (new_sta) 4406 sta_info_free(local, new_sta); 4407 return -EINVAL; 4408 } 4409 } 4410 4411 if (new_sta) { 4412 u32 rates = 0, basic_rates = 0; 4413 bool have_higher_than_11mbit; 4414 int min_rate = INT_MAX, min_rate_index = -1; 4415 struct ieee80211_chanctx_conf *chanctx_conf; 4416 const struct cfg80211_bss_ies *ies; 4417 int shift = ieee80211_vif_get_shift(&sdata->vif); 4418 u32 rate_flags; 4419 4420 rcu_read_lock(); 4421 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4422 if (WARN_ON(!chanctx_conf)) { 4423 rcu_read_unlock(); 4424 sta_info_free(local, new_sta); 4425 return -EINVAL; 4426 } 4427 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 4428 rcu_read_unlock(); 4429 4430 ieee80211_get_rates(sband, bss->supp_rates, 4431 bss->supp_rates_len, 4432 &rates, &basic_rates, 4433 &have_higher_than_11mbit, 4434 &min_rate, &min_rate_index, 4435 shift, rate_flags); 4436 4437 /* 4438 * This used to be a workaround for basic rates missing 4439 * in the association response frame. Now that we no 4440 * longer use the basic rates from there, it probably 4441 * doesn't happen any more, but keep the workaround so 4442 * in case some *other* APs are buggy in different ways 4443 * we can connect -- with a warning. 4444 */ 4445 if (!basic_rates && min_rate_index >= 0) { 4446 sdata_info(sdata, 4447 "No basic rates, using min rate instead\n"); 4448 basic_rates = BIT(min_rate_index); 4449 } 4450 4451 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4452 sdata->vif.bss_conf.basic_rates = basic_rates; 4453 4454 /* cf. IEEE 802.11 9.2.12 */ 4455 if (cbss->channel->band == IEEE80211_BAND_2GHZ && 4456 have_higher_than_11mbit) 4457 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4458 else 4459 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4460 4461 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4462 4463 /* set timing information */ 4464 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4465 rcu_read_lock(); 4466 ies = rcu_dereference(cbss->beacon_ies); 4467 if (ies) { 4468 const u8 *tim_ie; 4469 4470 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4471 sdata->vif.bss_conf.sync_device_ts = 4472 bss->device_ts_beacon; 4473 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4474 ies->data, ies->len); 4475 if (tim_ie && tim_ie[1] >= 2) 4476 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4477 else 4478 sdata->vif.bss_conf.sync_dtim_count = 0; 4479 } else if (!ieee80211_hw_check(&sdata->local->hw, 4480 TIMING_BEACON_ONLY)) { 4481 ies = rcu_dereference(cbss->proberesp_ies); 4482 /* must be non-NULL since beacon IEs were NULL */ 4483 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4484 sdata->vif.bss_conf.sync_device_ts = 4485 bss->device_ts_presp; 4486 sdata->vif.bss_conf.sync_dtim_count = 0; 4487 } else { 4488 sdata->vif.bss_conf.sync_tsf = 0; 4489 sdata->vif.bss_conf.sync_device_ts = 0; 4490 sdata->vif.bss_conf.sync_dtim_count = 0; 4491 } 4492 rcu_read_unlock(); 4493 4494 /* tell driver about BSSID, basic rates and timing */ 4495 ieee80211_bss_info_change_notify(sdata, 4496 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4497 BSS_CHANGED_BEACON_INT); 4498 4499 if (assoc) 4500 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4501 4502 err = sta_info_insert(new_sta); 4503 new_sta = NULL; 4504 if (err) { 4505 sdata_info(sdata, 4506 "failed to insert STA entry for the AP (error %d)\n", 4507 err); 4508 return err; 4509 } 4510 } else 4511 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4512 4513 /* Cancel scan to ensure that nothing interferes with connection */ 4514 if (local->scanning) 4515 ieee80211_scan_cancel(local); 4516 4517 return 0; 4518 } 4519 4520 /* config hooks */ 4521 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4522 struct cfg80211_auth_request *req) 4523 { 4524 struct ieee80211_local *local = sdata->local; 4525 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4526 struct ieee80211_mgd_auth_data *auth_data; 4527 u16 auth_alg; 4528 int err; 4529 4530 /* prepare auth data structure */ 4531 4532 switch (req->auth_type) { 4533 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4534 auth_alg = WLAN_AUTH_OPEN; 4535 break; 4536 case NL80211_AUTHTYPE_SHARED_KEY: 4537 if (IS_ERR(local->wep_tx_tfm)) 4538 return -EOPNOTSUPP; 4539 auth_alg = WLAN_AUTH_SHARED_KEY; 4540 break; 4541 case NL80211_AUTHTYPE_FT: 4542 auth_alg = WLAN_AUTH_FT; 4543 break; 4544 case NL80211_AUTHTYPE_NETWORK_EAP: 4545 auth_alg = WLAN_AUTH_LEAP; 4546 break; 4547 case NL80211_AUTHTYPE_SAE: 4548 auth_alg = WLAN_AUTH_SAE; 4549 break; 4550 default: 4551 return -EOPNOTSUPP; 4552 } 4553 4554 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + 4555 req->ie_len, GFP_KERNEL); 4556 if (!auth_data) 4557 return -ENOMEM; 4558 4559 auth_data->bss = req->bss; 4560 4561 if (req->sae_data_len >= 4) { 4562 __le16 *pos = (__le16 *) req->sae_data; 4563 auth_data->sae_trans = le16_to_cpu(pos[0]); 4564 auth_data->sae_status = le16_to_cpu(pos[1]); 4565 memcpy(auth_data->data, req->sae_data + 4, 4566 req->sae_data_len - 4); 4567 auth_data->data_len += req->sae_data_len - 4; 4568 } 4569 4570 if (req->ie && req->ie_len) { 4571 memcpy(&auth_data->data[auth_data->data_len], 4572 req->ie, req->ie_len); 4573 auth_data->data_len += req->ie_len; 4574 } 4575 4576 if (req->key && req->key_len) { 4577 auth_data->key_len = req->key_len; 4578 auth_data->key_idx = req->key_idx; 4579 memcpy(auth_data->key, req->key, req->key_len); 4580 } 4581 4582 auth_data->algorithm = auth_alg; 4583 4584 /* try to authenticate/probe */ 4585 4586 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4587 ifmgd->assoc_data) { 4588 err = -EBUSY; 4589 goto err_free; 4590 } 4591 4592 if (ifmgd->auth_data) 4593 ieee80211_destroy_auth_data(sdata, false); 4594 4595 /* prep auth_data so we don't go into idle on disassoc */ 4596 ifmgd->auth_data = auth_data; 4597 4598 if (ifmgd->associated) { 4599 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4600 4601 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4602 WLAN_REASON_UNSPECIFIED, 4603 false, frame_buf); 4604 4605 ieee80211_report_disconnect(sdata, frame_buf, 4606 sizeof(frame_buf), true, 4607 WLAN_REASON_UNSPECIFIED); 4608 } 4609 4610 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4611 4612 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4613 if (err) 4614 goto err_clear; 4615 4616 err = ieee80211_probe_auth(sdata); 4617 if (err) { 4618 sta_info_destroy_addr(sdata, req->bss->bssid); 4619 goto err_clear; 4620 } 4621 4622 /* hold our own reference */ 4623 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4624 return 0; 4625 4626 err_clear: 4627 eth_zero_addr(ifmgd->bssid); 4628 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4629 ifmgd->auth_data = NULL; 4630 mutex_lock(&sdata->local->mtx); 4631 ieee80211_vif_release_channel(sdata); 4632 mutex_unlock(&sdata->local->mtx); 4633 err_free: 4634 kfree(auth_data); 4635 return err; 4636 } 4637 4638 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata, 4639 const u8 *wmm_param, int len) 4640 { 4641 const u8 *pos; 4642 size_t left; 4643 4644 if (len < 8) 4645 return false; 4646 4647 if (wmm_param[5] != 1 /* version */) 4648 return false; 4649 4650 pos = wmm_param + 8; 4651 left = len - 8; 4652 4653 for (; left >= 4; left -= 4, pos += 4) { 4654 u8 aifsn = pos[0] & 0x0f; 4655 u8 ecwmin = pos[1] & 0x0f; 4656 u8 ecwmax = (pos[1] & 0xf0) >> 4; 4657 int aci = (pos[0] >> 5) & 0x03; 4658 4659 if (aifsn < 2) { 4660 sdata_info(sdata, 4661 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n", 4662 aifsn, aci); 4663 return false; 4664 } 4665 if (ecwmin > ecwmax) { 4666 sdata_info(sdata, 4667 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n", 4668 ecwmin, ecwmax, aci); 4669 return false; 4670 } 4671 } 4672 4673 return true; 4674 } 4675 4676 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4677 struct cfg80211_assoc_request *req) 4678 { 4679 struct ieee80211_local *local = sdata->local; 4680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4681 struct ieee80211_bss *bss = (void *)req->bss->priv; 4682 struct ieee80211_mgd_assoc_data *assoc_data; 4683 const struct cfg80211_bss_ies *beacon_ies; 4684 struct ieee80211_supported_band *sband; 4685 const u8 *ssidie, *ht_ie, *vht_ie; 4686 int i, err; 4687 bool override = false; 4688 4689 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4690 if (!assoc_data) 4691 return -ENOMEM; 4692 4693 rcu_read_lock(); 4694 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4695 if (!ssidie) { 4696 rcu_read_unlock(); 4697 kfree(assoc_data); 4698 return -EINVAL; 4699 } 4700 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4701 assoc_data->ssid_len = ssidie[1]; 4702 rcu_read_unlock(); 4703 4704 if (ifmgd->associated) { 4705 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4706 4707 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4708 WLAN_REASON_UNSPECIFIED, 4709 false, frame_buf); 4710 4711 ieee80211_report_disconnect(sdata, frame_buf, 4712 sizeof(frame_buf), true, 4713 WLAN_REASON_UNSPECIFIED); 4714 } 4715 4716 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4717 err = -EBUSY; 4718 goto err_free; 4719 } 4720 4721 if (ifmgd->assoc_data) { 4722 err = -EBUSY; 4723 goto err_free; 4724 } 4725 4726 if (ifmgd->auth_data) { 4727 bool match; 4728 4729 /* keep sta info, bssid if matching */ 4730 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4731 ieee80211_destroy_auth_data(sdata, match); 4732 } 4733 4734 /* prepare assoc data */ 4735 4736 ifmgd->beacon_crc_valid = false; 4737 4738 assoc_data->wmm = bss->wmm_used && 4739 (local->hw.queues >= IEEE80211_NUM_ACS); 4740 if (assoc_data->wmm) { 4741 /* try to check validity of WMM params IE */ 4742 const struct cfg80211_bss_ies *ies; 4743 const u8 *wp, *start, *end; 4744 4745 rcu_read_lock(); 4746 ies = rcu_dereference(req->bss->ies); 4747 start = ies->data; 4748 end = start + ies->len; 4749 4750 while (true) { 4751 wp = cfg80211_find_vendor_ie( 4752 WLAN_OUI_MICROSOFT, 4753 WLAN_OUI_TYPE_MICROSOFT_WMM, 4754 start, end - start); 4755 if (!wp) 4756 break; 4757 start = wp + wp[1] + 2; 4758 /* if this IE is too short, try the next */ 4759 if (wp[1] <= 4) 4760 continue; 4761 /* if this IE is WMM params, we found what we wanted */ 4762 if (wp[6] == 1) 4763 break; 4764 } 4765 4766 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2, 4767 wp[1] - 2)) { 4768 assoc_data->wmm = false; 4769 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 4770 } 4771 rcu_read_unlock(); 4772 } 4773 4774 /* 4775 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4776 * We still associate in non-HT mode (11a/b/g) if any one of these 4777 * ciphers is configured as pairwise. 4778 * We can set this to true for non-11n hardware, that'll be checked 4779 * separately along with the peer capabilities. 4780 */ 4781 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4782 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4783 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4784 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4785 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4786 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4787 netdev_info(sdata->dev, 4788 "disabling HT/VHT due to WEP/TKIP use\n"); 4789 } 4790 } 4791 4792 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4793 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4794 if (!sband->ht_cap.ht_supported || 4795 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4796 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4797 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4798 if (!bss->wmm_used && 4799 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4800 netdev_info(sdata->dev, 4801 "disabling HT as WMM/QoS is not supported by the AP\n"); 4802 } 4803 4804 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4805 if (!sband->vht_cap.vht_supported || 4806 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4807 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4808 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4809 if (!bss->wmm_used && 4810 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4811 netdev_info(sdata->dev, 4812 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4813 } 4814 4815 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4816 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4817 sizeof(ifmgd->ht_capa_mask)); 4818 4819 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4820 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4821 sizeof(ifmgd->vht_capa_mask)); 4822 4823 if (req->ie && req->ie_len) { 4824 memcpy(assoc_data->ie, req->ie, req->ie_len); 4825 assoc_data->ie_len = req->ie_len; 4826 } 4827 4828 assoc_data->bss = req->bss; 4829 4830 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4831 if (ifmgd->powersave) 4832 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4833 else 4834 sdata->smps_mode = IEEE80211_SMPS_OFF; 4835 } else 4836 sdata->smps_mode = ifmgd->req_smps; 4837 4838 assoc_data->capability = req->bss->capability; 4839 assoc_data->supp_rates = bss->supp_rates; 4840 assoc_data->supp_rates_len = bss->supp_rates_len; 4841 4842 rcu_read_lock(); 4843 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4844 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4845 assoc_data->ap_ht_param = 4846 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4847 else 4848 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4849 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4850 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4851 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4852 sizeof(struct ieee80211_vht_cap)); 4853 else 4854 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4855 rcu_read_unlock(); 4856 4857 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4858 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4859 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4860 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4861 4862 if (bss->wmm_used && bss->uapsd_supported && 4863 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4864 assoc_data->uapsd = true; 4865 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4866 } else { 4867 assoc_data->uapsd = false; 4868 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4869 } 4870 4871 if (req->prev_bssid) 4872 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4873 4874 if (req->use_mfp) { 4875 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4876 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4877 } else { 4878 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4879 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4880 } 4881 4882 if (req->flags & ASSOC_REQ_USE_RRM) 4883 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4884 else 4885 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4886 4887 if (req->crypto.control_port) 4888 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4889 else 4890 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4891 4892 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4893 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4894 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4895 sdata->vif.type); 4896 4897 /* kick off associate process */ 4898 4899 ifmgd->assoc_data = assoc_data; 4900 ifmgd->dtim_period = 0; 4901 ifmgd->have_beacon = false; 4902 4903 /* override HT/VHT configuration only if the AP and we support it */ 4904 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4905 struct ieee80211_sta_ht_cap sta_ht_cap; 4906 4907 if (req->flags & ASSOC_REQ_DISABLE_HT) 4908 override = true; 4909 4910 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4911 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4912 4913 /* check for 40 MHz disable override */ 4914 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4915 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4916 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4917 override = true; 4918 4919 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4920 req->flags & ASSOC_REQ_DISABLE_VHT) 4921 override = true; 4922 } 4923 4924 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4925 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4926 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4927 } 4928 4929 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4930 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4931 4932 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4933 if (err) 4934 goto err_clear; 4935 4936 rcu_read_lock(); 4937 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4938 4939 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4940 !beacon_ies) { 4941 /* 4942 * Wait up to one beacon interval ... 4943 * should this be more if we miss one? 4944 */ 4945 sdata_info(sdata, "waiting for beacon from %pM\n", 4946 ifmgd->bssid); 4947 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4948 assoc_data->timeout_started = true; 4949 assoc_data->need_beacon = true; 4950 } else if (beacon_ies) { 4951 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4952 beacon_ies->data, 4953 beacon_ies->len); 4954 u8 dtim_count = 0; 4955 4956 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4957 const struct ieee80211_tim_ie *tim; 4958 tim = (void *)(tim_ie + 2); 4959 ifmgd->dtim_period = tim->dtim_period; 4960 dtim_count = tim->dtim_count; 4961 } 4962 ifmgd->have_beacon = true; 4963 assoc_data->timeout = jiffies; 4964 assoc_data->timeout_started = true; 4965 4966 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4967 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4968 sdata->vif.bss_conf.sync_device_ts = 4969 bss->device_ts_beacon; 4970 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4971 } 4972 } else { 4973 assoc_data->timeout = jiffies; 4974 assoc_data->timeout_started = true; 4975 } 4976 rcu_read_unlock(); 4977 4978 run_again(sdata, assoc_data->timeout); 4979 4980 if (bss->corrupt_data) { 4981 char *corrupt_type = "data"; 4982 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4983 if (bss->corrupt_data & 4984 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4985 corrupt_type = "beacon and probe response"; 4986 else 4987 corrupt_type = "beacon"; 4988 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4989 corrupt_type = "probe response"; 4990 sdata_info(sdata, "associating with AP with corrupt %s\n", 4991 corrupt_type); 4992 } 4993 4994 return 0; 4995 err_clear: 4996 eth_zero_addr(ifmgd->bssid); 4997 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4998 ifmgd->assoc_data = NULL; 4999 err_free: 5000 kfree(assoc_data); 5001 return err; 5002 } 5003 5004 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5005 struct cfg80211_deauth_request *req) 5006 { 5007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5008 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5009 bool tx = !req->local_state_change; 5010 5011 if (ifmgd->auth_data && 5012 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5013 sdata_info(sdata, 5014 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5015 req->bssid, req->reason_code, 5016 ieee80211_get_reason_code_string(req->reason_code)); 5017 5018 drv_mgd_prepare_tx(sdata->local, sdata); 5019 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5020 IEEE80211_STYPE_DEAUTH, 5021 req->reason_code, tx, 5022 frame_buf); 5023 ieee80211_destroy_auth_data(sdata, false); 5024 ieee80211_report_disconnect(sdata, frame_buf, 5025 sizeof(frame_buf), true, 5026 req->reason_code); 5027 5028 return 0; 5029 } 5030 5031 if (ifmgd->associated && 5032 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5033 sdata_info(sdata, 5034 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5035 req->bssid, req->reason_code, 5036 ieee80211_get_reason_code_string(req->reason_code)); 5037 5038 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5039 req->reason_code, tx, frame_buf); 5040 ieee80211_report_disconnect(sdata, frame_buf, 5041 sizeof(frame_buf), true, 5042 req->reason_code); 5043 return 0; 5044 } 5045 5046 return -ENOTCONN; 5047 } 5048 5049 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5050 struct cfg80211_disassoc_request *req) 5051 { 5052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5053 u8 bssid[ETH_ALEN]; 5054 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5055 5056 /* 5057 * cfg80211 should catch this ... but it's racy since 5058 * we can receive a disassoc frame, process it, hand it 5059 * to cfg80211 while that's in a locked section already 5060 * trying to tell us that the user wants to disconnect. 5061 */ 5062 if (ifmgd->associated != req->bss) 5063 return -ENOLINK; 5064 5065 sdata_info(sdata, 5066 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5067 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5068 5069 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5070 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5071 req->reason_code, !req->local_state_change, 5072 frame_buf); 5073 5074 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5075 req->reason_code); 5076 5077 return 0; 5078 } 5079 5080 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5081 { 5082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5083 5084 /* 5085 * Make sure some work items will not run after this, 5086 * they will not do anything but might not have been 5087 * cancelled when disconnecting. 5088 */ 5089 cancel_work_sync(&ifmgd->monitor_work); 5090 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5091 cancel_work_sync(&ifmgd->request_smps_work); 5092 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5093 cancel_work_sync(&ifmgd->chswitch_work); 5094 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5095 5096 sdata_lock(sdata); 5097 if (ifmgd->assoc_data) { 5098 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5099 ieee80211_destroy_assoc_data(sdata, false); 5100 cfg80211_assoc_timeout(sdata->dev, bss); 5101 } 5102 if (ifmgd->auth_data) 5103 ieee80211_destroy_auth_data(sdata, false); 5104 spin_lock_bh(&ifmgd->teardown_lock); 5105 if (ifmgd->teardown_skb) { 5106 kfree_skb(ifmgd->teardown_skb); 5107 ifmgd->teardown_skb = NULL; 5108 ifmgd->orig_teardown_skb = NULL; 5109 } 5110 spin_unlock_bh(&ifmgd->teardown_lock); 5111 del_timer_sync(&ifmgd->timer); 5112 sdata_unlock(sdata); 5113 } 5114 5115 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5116 enum nl80211_cqm_rssi_threshold_event rssi_event, 5117 gfp_t gfp) 5118 { 5119 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5120 5121 trace_api_cqm_rssi_notify(sdata, rssi_event); 5122 5123 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); 5124 } 5125 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5126 5127 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5128 { 5129 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5130 5131 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5132 5133 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5134 } 5135 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5136