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 - 2017 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/crc32.h> 24 #include <linux/slab.h> 25 #include <linux/export.h> 26 #include <net/mac80211.h> 27 #include <asm/unaligned.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "led.h" 33 #include "fils_aead.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 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 const struct ieee80211_ht_cap *ht_cap, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 struct cfg80211_chan_def *chandef, bool tracking) 152 { 153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 154 struct cfg80211_chan_def vht_chandef; 155 struct ieee80211_sta_ht_cap sta_ht_cap; 156 u32 ht_cfreq, ret; 157 158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 160 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->center_freq2 = 0; 165 166 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) { 167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 168 goto out; 169 } 170 171 chandef->width = NL80211_CHAN_WIDTH_20; 172 173 if (!(ht_cap->cap_info & 174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 175 ret = IEEE80211_STA_DISABLE_40MHZ; 176 vht_chandef = *chandef; 177 goto out; 178 } 179 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 181 channel->band); 182 /* check that channel matches the right operating channel */ 183 if (!tracking && channel->center_freq != ht_cfreq) { 184 /* 185 * It's possible that some APs are confused here; 186 * Netgear WNDR3700 sometimes reports 4 higher than 187 * the actual channel in association responses, but 188 * since we look at probe response/beacon data here 189 * it should be OK. 190 */ 191 sdata_info(sdata, 192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 193 channel->center_freq, ht_cfreq, 194 ht_oper->primary_chan, channel->band); 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 196 goto out; 197 } 198 199 /* check 40 MHz support, if we have it */ 200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 201 ieee80211_chandef_ht_oper(ht_oper, chandef); 202 } else { 203 /* 40 MHz (and 80 MHz) must be supported for VHT */ 204 ret = IEEE80211_STA_DISABLE_VHT; 205 /* also mark 40 MHz disabled */ 206 ret |= IEEE80211_STA_DISABLE_40MHZ; 207 goto out; 208 } 209 210 if (!vht_oper || !sband->vht_cap.vht_supported) { 211 ret = IEEE80211_STA_DISABLE_VHT; 212 goto out; 213 } 214 215 vht_chandef = *chandef; 216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 218 sdata_info(sdata, 219 "AP VHT information is invalid, disable VHT\n"); 220 ret = IEEE80211_STA_DISABLE_VHT; 221 goto out; 222 } 223 224 if (!cfg80211_chandef_valid(&vht_chandef)) { 225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 226 sdata_info(sdata, 227 "AP VHT information is invalid, disable VHT\n"); 228 ret = IEEE80211_STA_DISABLE_VHT; 229 goto out; 230 } 231 232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 233 ret = 0; 234 goto out; 235 } 236 237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 239 sdata_info(sdata, 240 "AP VHT information doesn't match HT, disable VHT\n"); 241 ret = IEEE80211_STA_DISABLE_VHT; 242 goto out; 243 } 244 245 *chandef = vht_chandef; 246 247 ret = 0; 248 249 out: 250 /* 251 * When tracking the current AP, don't do any further checks if the 252 * new chandef is identical to the one we're currently using for the 253 * connection. This keeps us from playing ping-pong with regulatory, 254 * without it the following can happen (for example): 255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 256 * - AP advertises regdom US 257 * - CRDA loads regdom US with 80 MHz prohibited (old database) 258 * - the code below detects an unsupported channel, downgrades, and 259 * we disconnect from the AP in the caller 260 * - disconnect causes CRDA to reload world regdomain and the game 261 * starts anew. 262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 263 * 264 * It seems possible that there are still scenarios with CSA or real 265 * bandwidth changes where a this could happen, but those cases are 266 * less common and wouldn't completely prevent using the AP. 267 */ 268 if (tracking && 269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 270 return ret; 271 272 /* don't print the message below for VHT mismatch if VHT is disabled */ 273 if (ret & IEEE80211_STA_DISABLE_VHT) 274 vht_chandef = *chandef; 275 276 /* 277 * Ignore the DISABLED flag when we're already connected and only 278 * tracking the APs beacon for bandwidth changes - otherwise we 279 * might get disconnected here if we connect to an AP, update our 280 * regulatory information based on the AP's country IE and the 281 * information we have is wrong/outdated and disables the channel 282 * that we're actually using for the connection to the AP. 283 */ 284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 285 tracking ? 0 : 286 IEEE80211_CHAN_DISABLED)) { 287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 288 ret = IEEE80211_STA_DISABLE_HT | 289 IEEE80211_STA_DISABLE_VHT; 290 break; 291 } 292 293 ret |= ieee80211_chandef_downgrade(chandef); 294 } 295 296 if (chandef->width != vht_chandef.width && !tracking) 297 sdata_info(sdata, 298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 299 300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 301 return ret; 302 } 303 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 305 struct sta_info *sta, 306 const struct ieee80211_ht_cap *ht_cap, 307 const struct ieee80211_ht_operation *ht_oper, 308 const struct ieee80211_vht_operation *vht_oper, 309 const u8 *bssid, u32 *changed) 310 { 311 struct ieee80211_local *local = sdata->local; 312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 313 struct ieee80211_supported_band *sband; 314 struct ieee80211_channel *chan; 315 struct cfg80211_chan_def chandef; 316 u16 ht_opmode; 317 u32 flags; 318 enum ieee80211_sta_rx_bandwidth new_sta_bw; 319 int ret; 320 321 /* if HT was/is disabled, don't track any bandwidth changes */ 322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 323 return 0; 324 325 /* don't check VHT if we associated as non-VHT station */ 326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 327 vht_oper = NULL; 328 329 if (WARN_ON_ONCE(!sta)) 330 return -EINVAL; 331 332 /* 333 * if bss configuration changed store the new one - 334 * this may be applicable even if channel is identical 335 */ 336 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 338 *changed |= BSS_CHANGED_HT; 339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 340 } 341 342 chan = sdata->vif.bss_conf.chandef.chan; 343 sband = local->hw.wiphy->bands[chan->band]; 344 345 /* calculate new channel (type) based on HT/VHT operation IEs */ 346 flags = ieee80211_determine_chantype(sdata, sband, chan, 347 ht_cap, ht_oper, vht_oper, 348 &chandef, true); 349 350 /* 351 * Downgrade the new channel if we associated with restricted 352 * capabilities. For example, if we associated as a 20 MHz STA 353 * to a 40 MHz AP (due to regulatory, capabilities or config 354 * reasons) then switching to a 40 MHz channel now won't do us 355 * any good -- we couldn't use it with the AP. 356 */ 357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 358 chandef.width == NL80211_CHAN_WIDTH_80P80) 359 flags |= ieee80211_chandef_downgrade(&chandef); 360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 361 chandef.width == NL80211_CHAN_WIDTH_160) 362 flags |= ieee80211_chandef_downgrade(&chandef); 363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 364 chandef.width > NL80211_CHAN_WIDTH_20) 365 flags |= ieee80211_chandef_downgrade(&chandef); 366 367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 368 return 0; 369 370 sdata_info(sdata, 371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 372 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 373 chandef.center_freq1, chandef.center_freq2); 374 375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 376 IEEE80211_STA_DISABLE_VHT | 377 IEEE80211_STA_DISABLE_40MHZ | 378 IEEE80211_STA_DISABLE_80P80MHZ | 379 IEEE80211_STA_DISABLE_160MHZ)) || 380 !cfg80211_chandef_valid(&chandef)) { 381 sdata_info(sdata, 382 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 383 ifmgd->bssid); 384 return -EINVAL; 385 } 386 387 switch (chandef.width) { 388 case NL80211_CHAN_WIDTH_20_NOHT: 389 case NL80211_CHAN_WIDTH_20: 390 new_sta_bw = IEEE80211_STA_RX_BW_20; 391 break; 392 case NL80211_CHAN_WIDTH_40: 393 new_sta_bw = IEEE80211_STA_RX_BW_40; 394 break; 395 case NL80211_CHAN_WIDTH_80: 396 new_sta_bw = IEEE80211_STA_RX_BW_80; 397 break; 398 case NL80211_CHAN_WIDTH_80P80: 399 case NL80211_CHAN_WIDTH_160: 400 new_sta_bw = IEEE80211_STA_RX_BW_160; 401 break; 402 default: 403 return -EINVAL; 404 } 405 406 if (new_sta_bw > sta->cur_max_bandwidth) 407 new_sta_bw = sta->cur_max_bandwidth; 408 409 if (new_sta_bw < sta->sta.bandwidth) { 410 sta->sta.bandwidth = new_sta_bw; 411 rate_control_rate_update(local, sband, sta, 412 IEEE80211_RC_BW_CHANGED); 413 } 414 415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 416 if (ret) { 417 sdata_info(sdata, 418 "AP %pM changed bandwidth to incompatible one - disconnect\n", 419 ifmgd->bssid); 420 return ret; 421 } 422 423 if (new_sta_bw > sta->sta.bandwidth) { 424 sta->sta.bandwidth = new_sta_bw; 425 rate_control_rate_update(local, sband, sta, 426 IEEE80211_RC_BW_CHANGED); 427 } 428 429 return 0; 430 } 431 432 /* frame sending functions */ 433 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 435 struct sk_buff *skb, u8 ap_ht_param, 436 struct ieee80211_supported_band *sband, 437 struct ieee80211_channel *channel, 438 enum ieee80211_smps_mode smps) 439 { 440 u8 *pos; 441 u32 flags = channel->flags; 442 u16 cap; 443 struct ieee80211_sta_ht_cap ht_cap; 444 445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 446 447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 448 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 449 450 /* determine capability flags */ 451 cap = ht_cap.cap; 452 453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 457 cap &= ~IEEE80211_HT_CAP_SGI_40; 458 } 459 break; 460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 463 cap &= ~IEEE80211_HT_CAP_SGI_40; 464 } 465 break; 466 } 467 468 /* 469 * If 40 MHz was disabled associate as though we weren't 470 * capable of 40 MHz -- some broken APs will never fall 471 * back to trying to transmit in 20 MHz. 472 */ 473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 475 cap &= ~IEEE80211_HT_CAP_SGI_40; 476 } 477 478 /* set SM PS mode properly */ 479 cap &= ~IEEE80211_HT_CAP_SM_PS; 480 switch (smps) { 481 case IEEE80211_SMPS_AUTOMATIC: 482 case IEEE80211_SMPS_NUM_MODES: 483 WARN_ON(1); 484 case IEEE80211_SMPS_OFF: 485 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 486 IEEE80211_HT_CAP_SM_PS_SHIFT; 487 break; 488 case IEEE80211_SMPS_STATIC: 489 cap |= WLAN_HT_CAP_SM_PS_STATIC << 490 IEEE80211_HT_CAP_SM_PS_SHIFT; 491 break; 492 case IEEE80211_SMPS_DYNAMIC: 493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 494 IEEE80211_HT_CAP_SM_PS_SHIFT; 495 break; 496 } 497 498 /* reserve and fill IE */ 499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 501 } 502 503 /* This function determines vht capability flags for the association 504 * and builds the IE. 505 * Note - the function may set the owner of the MU-MIMO capability 506 */ 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 508 struct sk_buff *skb, 509 struct ieee80211_supported_band *sband, 510 struct ieee80211_vht_cap *ap_vht_cap) 511 { 512 struct ieee80211_local *local = sdata->local; 513 u8 *pos; 514 u32 cap; 515 struct ieee80211_sta_vht_cap vht_cap; 516 u32 mask, ap_bf_sts, our_bf_sts; 517 518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 519 520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 522 523 /* determine capability flags */ 524 cap = vht_cap.cap; 525 526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 528 529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 533 } 534 535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 538 } 539 540 /* 541 * Some APs apparently get confused if our capabilities are better 542 * than theirs, so restrict what we advertise in the assoc request. 543 */ 544 if (!(ap_vht_cap->vht_cap_info & 545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 548 else if (!(ap_vht_cap->vht_cap_info & 549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 551 552 /* 553 * If some other vif is using the MU-MIMO capablity we cannot associate 554 * using MU-MIMO - this will lead to contradictions in the group-id 555 * mechanism. 556 * Ownership is defined since association request, in order to avoid 557 * simultaneous associations with MU-MIMO. 558 */ 559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 560 bool disable_mu_mimo = false; 561 struct ieee80211_sub_if_data *other; 562 563 list_for_each_entry_rcu(other, &local->interfaces, list) { 564 if (other->vif.mu_mimo_owner) { 565 disable_mu_mimo = true; 566 break; 567 } 568 } 569 if (disable_mu_mimo) 570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 571 else 572 sdata->vif.mu_mimo_owner = true; 573 } 574 575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 576 577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 578 our_bf_sts = cap & mask; 579 580 if (ap_bf_sts < our_bf_sts) { 581 cap &= ~mask; 582 cap |= ap_bf_sts; 583 } 584 585 /* reserve and fill IE */ 586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 588 } 589 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 591 { 592 struct ieee80211_local *local = sdata->local; 593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 595 struct sk_buff *skb; 596 struct ieee80211_mgmt *mgmt; 597 u8 *pos, qos_info; 598 size_t offset = 0, noffset; 599 int i, count, rates_len, supp_rates_len, shift; 600 u16 capab; 601 struct ieee80211_supported_band *sband; 602 struct ieee80211_chanctx_conf *chanctx_conf; 603 struct ieee80211_channel *chan; 604 u32 rate_flags, rates = 0; 605 606 sdata_assert_lock(sdata); 607 608 rcu_read_lock(); 609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 610 if (WARN_ON(!chanctx_conf)) { 611 rcu_read_unlock(); 612 return; 613 } 614 chan = chanctx_conf->def.chan; 615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 616 rcu_read_unlock(); 617 sband = local->hw.wiphy->bands[chan->band]; 618 shift = ieee80211_vif_get_shift(&sdata->vif); 619 620 if (assoc_data->supp_rates_len) { 621 /* 622 * Get all rates supported by the device and the AP as 623 * some APs don't like getting a superset of their rates 624 * in the association request (e.g. D-Link DAP 1353 in 625 * b-only mode)... 626 */ 627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 628 assoc_data->supp_rates, 629 assoc_data->supp_rates_len, 630 &rates); 631 } else { 632 /* 633 * In case AP not provide any supported rates information 634 * before association, we send information element(s) with 635 * all rates that we support. 636 */ 637 rates_len = 0; 638 for (i = 0; i < sband->n_bitrates; i++) { 639 if ((rate_flags & sband->bitrates[i].flags) 640 != rate_flags) 641 continue; 642 rates |= BIT(i); 643 rates_len++; 644 } 645 } 646 647 skb = alloc_skb(local->hw.extra_tx_headroom + 648 sizeof(*mgmt) + /* bit too much but doesn't matter */ 649 2 + assoc_data->ssid_len + /* SSID */ 650 4 + rates_len + /* (extended) rates */ 651 4 + /* power capability */ 652 2 + 2 * sband->n_channels + /* supported channels */ 653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 655 assoc_data->ie_len + /* extra IEs */ 656 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 657 9, /* WMM */ 658 GFP_KERNEL); 659 if (!skb) 660 return; 661 662 skb_reserve(skb, local->hw.extra_tx_headroom); 663 664 capab = WLAN_CAPABILITY_ESS; 665 666 if (sband->band == NL80211_BAND_2GHZ) { 667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 668 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 669 } 670 671 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 672 capab |= WLAN_CAPABILITY_PRIVACY; 673 674 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 675 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 676 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 677 678 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 679 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 680 681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 682 memset(mgmt, 0, 24); 683 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 684 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 685 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 686 687 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 688 skb_put(skb, 10); 689 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 690 IEEE80211_STYPE_REASSOC_REQ); 691 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 692 mgmt->u.reassoc_req.listen_interval = 693 cpu_to_le16(local->hw.conf.listen_interval); 694 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 695 ETH_ALEN); 696 } else { 697 skb_put(skb, 4); 698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 699 IEEE80211_STYPE_ASSOC_REQ); 700 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 701 mgmt->u.assoc_req.listen_interval = 702 cpu_to_le16(local->hw.conf.listen_interval); 703 } 704 705 /* SSID */ 706 pos = skb_put(skb, 2 + assoc_data->ssid_len); 707 *pos++ = WLAN_EID_SSID; 708 *pos++ = assoc_data->ssid_len; 709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 710 711 /* add all rates which were marked to be used above */ 712 supp_rates_len = rates_len; 713 if (supp_rates_len > 8) 714 supp_rates_len = 8; 715 716 pos = skb_put(skb, supp_rates_len + 2); 717 *pos++ = WLAN_EID_SUPP_RATES; 718 *pos++ = supp_rates_len; 719 720 count = 0; 721 for (i = 0; i < sband->n_bitrates; i++) { 722 if (BIT(i) & rates) { 723 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 724 5 * (1 << shift)); 725 *pos++ = (u8) rate; 726 if (++count == 8) 727 break; 728 } 729 } 730 731 if (rates_len > count) { 732 pos = skb_put(skb, rates_len - count + 2); 733 *pos++ = WLAN_EID_EXT_SUPP_RATES; 734 *pos++ = rates_len - count; 735 736 for (i++; i < sband->n_bitrates; i++) { 737 if (BIT(i) & rates) { 738 int rate; 739 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 740 5 * (1 << shift)); 741 *pos++ = (u8) rate; 742 } 743 } 744 } 745 746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 747 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 748 pos = skb_put(skb, 4); 749 *pos++ = WLAN_EID_PWR_CAPABILITY; 750 *pos++ = 2; 751 *pos++ = 0; /* min tx power */ 752 /* max tx power */ 753 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 754 } 755 756 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 757 /* TODO: get this in reg domain format */ 758 pos = skb_put(skb, 2 * sband->n_channels + 2); 759 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 760 *pos++ = 2 * sband->n_channels; 761 for (i = 0; i < sband->n_channels; i++) { 762 *pos++ = ieee80211_frequency_to_channel( 763 sband->channels[i].center_freq); 764 *pos++ = 1; /* one channel in the subband*/ 765 } 766 } 767 768 /* if present, add any custom IEs that go before HT */ 769 if (assoc_data->ie_len) { 770 static const u8 before_ht[] = { 771 WLAN_EID_SSID, 772 WLAN_EID_SUPP_RATES, 773 WLAN_EID_EXT_SUPP_RATES, 774 WLAN_EID_PWR_CAPABILITY, 775 WLAN_EID_SUPPORTED_CHANNELS, 776 WLAN_EID_RSN, 777 WLAN_EID_QOS_CAPA, 778 WLAN_EID_RRM_ENABLED_CAPABILITIES, 779 WLAN_EID_MOBILITY_DOMAIN, 780 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 781 WLAN_EID_RIC_DATA, /* reassoc only */ 782 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 783 }; 784 static const u8 after_ric[] = { 785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 786 WLAN_EID_HT_CAPABILITY, 787 WLAN_EID_BSS_COEX_2040, 788 WLAN_EID_EXT_CAPABILITY, 789 WLAN_EID_QOS_TRAFFIC_CAPA, 790 WLAN_EID_TIM_BCAST_REQ, 791 WLAN_EID_INTERWORKING, 792 /* 60GHz doesn't happen right now */ 793 WLAN_EID_VHT_CAPABILITY, 794 WLAN_EID_OPMODE_NOTIF, 795 }; 796 797 noffset = ieee80211_ie_split_ric(assoc_data->ie, 798 assoc_data->ie_len, 799 before_ht, 800 ARRAY_SIZE(before_ht), 801 after_ric, 802 ARRAY_SIZE(after_ric), 803 offset); 804 pos = skb_put(skb, noffset - offset); 805 memcpy(pos, assoc_data->ie + offset, noffset - offset); 806 offset = noffset; 807 } 808 809 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 810 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 812 813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 814 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 815 sband, chan, sdata->smps_mode); 816 817 /* if present, add any custom IEs that go before VHT */ 818 if (assoc_data->ie_len) { 819 static const u8 before_vht[] = { 820 WLAN_EID_SSID, 821 WLAN_EID_SUPP_RATES, 822 WLAN_EID_EXT_SUPP_RATES, 823 WLAN_EID_PWR_CAPABILITY, 824 WLAN_EID_SUPPORTED_CHANNELS, 825 WLAN_EID_RSN, 826 WLAN_EID_QOS_CAPA, 827 WLAN_EID_RRM_ENABLED_CAPABILITIES, 828 WLAN_EID_MOBILITY_DOMAIN, 829 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 830 WLAN_EID_HT_CAPABILITY, 831 WLAN_EID_BSS_COEX_2040, 832 WLAN_EID_EXT_CAPABILITY, 833 WLAN_EID_QOS_TRAFFIC_CAPA, 834 WLAN_EID_TIM_BCAST_REQ, 835 WLAN_EID_INTERWORKING, 836 }; 837 838 /* RIC already taken above, so no need to handle here anymore */ 839 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 840 before_vht, ARRAY_SIZE(before_vht), 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 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 848 ieee80211_add_vht_ie(sdata, skb, sband, 849 &assoc_data->ap_vht_cap); 850 851 /* if present, add any custom non-vendor IEs that go after HT */ 852 if (assoc_data->ie_len) { 853 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 854 assoc_data->ie_len, 855 offset); 856 pos = skb_put(skb, noffset - offset); 857 memcpy(pos, assoc_data->ie + offset, noffset - offset); 858 offset = noffset; 859 } 860 861 if (assoc_data->wmm) { 862 if (assoc_data->uapsd) { 863 qos_info = ifmgd->uapsd_queues; 864 qos_info |= (ifmgd->uapsd_max_sp_len << 865 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 866 } else { 867 qos_info = 0; 868 } 869 870 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 871 } 872 873 /* add any remaining custom (i.e. vendor specific here) IEs */ 874 if (assoc_data->ie_len) { 875 noffset = assoc_data->ie_len; 876 pos = skb_put(skb, noffset - offset); 877 memcpy(pos, assoc_data->ie + offset, noffset - offset); 878 } 879 880 if (assoc_data->fils_kek_len && 881 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 882 dev_kfree_skb(skb); 883 return; 884 } 885 886 drv_mgd_prepare_tx(local, sdata); 887 888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 889 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 891 IEEE80211_TX_INTFL_MLME_CONN_TX; 892 ieee80211_tx_skb(sdata, skb); 893 } 894 895 void ieee80211_send_pspoll(struct ieee80211_local *local, 896 struct ieee80211_sub_if_data *sdata) 897 { 898 struct ieee80211_pspoll *pspoll; 899 struct sk_buff *skb; 900 901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 902 if (!skb) 903 return; 904 905 pspoll = (struct ieee80211_pspoll *) skb->data; 906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 907 908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 909 ieee80211_tx_skb(sdata, skb); 910 } 911 912 void ieee80211_send_nullfunc(struct ieee80211_local *local, 913 struct ieee80211_sub_if_data *sdata, 914 bool powersave) 915 { 916 struct sk_buff *skb; 917 struct ieee80211_hdr_3addr *nullfunc; 918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 919 920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 921 if (!skb) 922 return; 923 924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 925 if (powersave) 926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 927 928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 930 931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 933 934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 936 937 ieee80211_tx_skb(sdata, skb); 938 } 939 940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 941 struct ieee80211_sub_if_data *sdata) 942 { 943 struct sk_buff *skb; 944 struct ieee80211_hdr *nullfunc; 945 __le16 fc; 946 947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 948 return; 949 950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 951 if (!skb) 952 return; 953 954 skb_reserve(skb, local->hw.extra_tx_headroom); 955 956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 957 memset(nullfunc, 0, 30); 958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 960 nullfunc->frame_control = fc; 961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 965 966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 967 ieee80211_tx_skb(sdata, skb); 968 } 969 970 /* spectrum management related things */ 971 static void ieee80211_chswitch_work(struct work_struct *work) 972 { 973 struct ieee80211_sub_if_data *sdata = 974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 975 struct ieee80211_local *local = sdata->local; 976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 977 int ret; 978 979 if (!ieee80211_sdata_running(sdata)) 980 return; 981 982 sdata_lock(sdata); 983 mutex_lock(&local->mtx); 984 mutex_lock(&local->chanctx_mtx); 985 986 if (!ifmgd->associated) 987 goto out; 988 989 if (!sdata->vif.csa_active) 990 goto out; 991 992 /* 993 * using reservation isn't immediate as it may be deferred until later 994 * with multi-vif. once reservation is complete it will re-schedule the 995 * work with no reserved_chanctx so verify chandef to check if it 996 * completed successfully 997 */ 998 999 if (sdata->reserved_chanctx) { 1000 /* 1001 * with multi-vif csa driver may call ieee80211_csa_finish() 1002 * many times while waiting for other interfaces to use their 1003 * reservations 1004 */ 1005 if (sdata->reserved_ready) 1006 goto out; 1007 1008 ret = ieee80211_vif_use_reserved_context(sdata); 1009 if (ret) { 1010 sdata_info(sdata, 1011 "failed to use reserved channel context, disconnecting (err=%d)\n", 1012 ret); 1013 ieee80211_queue_work(&sdata->local->hw, 1014 &ifmgd->csa_connection_drop_work); 1015 goto out; 1016 } 1017 1018 goto out; 1019 } 1020 1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1022 &sdata->csa_chandef)) { 1023 sdata_info(sdata, 1024 "failed to finalize channel switch, disconnecting\n"); 1025 ieee80211_queue_work(&sdata->local->hw, 1026 &ifmgd->csa_connection_drop_work); 1027 goto out; 1028 } 1029 1030 /* XXX: shouldn't really modify cfg80211-owned data! */ 1031 ifmgd->associated->channel = sdata->csa_chandef.chan; 1032 1033 ifmgd->csa_waiting_bcn = true; 1034 1035 ieee80211_sta_reset_beacon_monitor(sdata); 1036 ieee80211_sta_reset_conn_monitor(sdata); 1037 1038 out: 1039 mutex_unlock(&local->chanctx_mtx); 1040 mutex_unlock(&local->mtx); 1041 sdata_unlock(sdata); 1042 } 1043 1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1045 { 1046 struct ieee80211_local *local = sdata->local; 1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1048 int ret; 1049 1050 sdata_assert_lock(sdata); 1051 1052 WARN_ON(!sdata->vif.csa_active); 1053 1054 if (sdata->csa_block_tx) { 1055 ieee80211_wake_vif_queues(local, sdata, 1056 IEEE80211_QUEUE_STOP_REASON_CSA); 1057 sdata->csa_block_tx = false; 1058 } 1059 1060 sdata->vif.csa_active = false; 1061 ifmgd->csa_waiting_bcn = false; 1062 1063 ret = drv_post_channel_switch(sdata); 1064 if (ret) { 1065 sdata_info(sdata, 1066 "driver post channel switch failed, disconnecting\n"); 1067 ieee80211_queue_work(&local->hw, 1068 &ifmgd->csa_connection_drop_work); 1069 return; 1070 } 1071 1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1073 } 1074 1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1076 { 1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1079 1080 trace_api_chswitch_done(sdata, success); 1081 if (!success) { 1082 sdata_info(sdata, 1083 "driver channel switch failed, disconnecting\n"); 1084 ieee80211_queue_work(&sdata->local->hw, 1085 &ifmgd->csa_connection_drop_work); 1086 } else { 1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1088 } 1089 } 1090 EXPORT_SYMBOL(ieee80211_chswitch_done); 1091 1092 static void ieee80211_chswitch_timer(unsigned long data) 1093 { 1094 struct ieee80211_sub_if_data *sdata = 1095 (struct ieee80211_sub_if_data *) data; 1096 1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1098 } 1099 1100 static void 1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1102 u64 timestamp, u32 device_timestamp, 1103 struct ieee802_11_elems *elems, 1104 bool beacon) 1105 { 1106 struct ieee80211_local *local = sdata->local; 1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1108 struct cfg80211_bss *cbss = ifmgd->associated; 1109 struct ieee80211_chanctx_conf *conf; 1110 struct ieee80211_chanctx *chanctx; 1111 enum nl80211_band current_band; 1112 struct ieee80211_csa_ie csa_ie; 1113 struct ieee80211_channel_switch ch_switch; 1114 int res; 1115 1116 sdata_assert_lock(sdata); 1117 1118 if (!cbss) 1119 return; 1120 1121 if (local->scanning) 1122 return; 1123 1124 /* disregard subsequent announcements if we are already processing */ 1125 if (sdata->vif.csa_active) 1126 return; 1127 1128 current_band = cbss->channel->band; 1129 memset(&csa_ie, 0, sizeof(csa_ie)); 1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1131 ifmgd->flags, 1132 ifmgd->associated->bssid, &csa_ie); 1133 if (res < 0) 1134 ieee80211_queue_work(&local->hw, 1135 &ifmgd->csa_connection_drop_work); 1136 if (res) 1137 return; 1138 1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1140 IEEE80211_CHAN_DISABLED)) { 1141 sdata_info(sdata, 1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1143 ifmgd->associated->bssid, 1144 csa_ie.chandef.chan->center_freq, 1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1146 csa_ie.chandef.center_freq2); 1147 ieee80211_queue_work(&local->hw, 1148 &ifmgd->csa_connection_drop_work); 1149 return; 1150 } 1151 1152 if (cfg80211_chandef_identical(&csa_ie.chandef, 1153 &sdata->vif.bss_conf.chandef)) { 1154 if (ifmgd->csa_ignored_same_chan) 1155 return; 1156 sdata_info(sdata, 1157 "AP %pM tries to chanswitch to same channel, ignore\n", 1158 ifmgd->associated->bssid); 1159 ifmgd->csa_ignored_same_chan = true; 1160 return; 1161 } 1162 1163 /* 1164 * Drop all TDLS peers - either we disconnect or move to a different 1165 * channel from this point on. There's no telling what our peer will do. 1166 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1167 * have an incompatible wider chandef. 1168 */ 1169 ieee80211_teardown_tdls_peers(sdata); 1170 1171 mutex_lock(&local->mtx); 1172 mutex_lock(&local->chanctx_mtx); 1173 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1174 lockdep_is_held(&local->chanctx_mtx)); 1175 if (!conf) { 1176 sdata_info(sdata, 1177 "no channel context assigned to vif?, disconnecting\n"); 1178 goto drop_connection; 1179 } 1180 1181 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1182 1183 if (local->use_chanctx && 1184 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1185 sdata_info(sdata, 1186 "driver doesn't support chan-switch with channel contexts\n"); 1187 goto drop_connection; 1188 } 1189 1190 ch_switch.timestamp = timestamp; 1191 ch_switch.device_timestamp = device_timestamp; 1192 ch_switch.block_tx = csa_ie.mode; 1193 ch_switch.chandef = csa_ie.chandef; 1194 ch_switch.count = csa_ie.count; 1195 1196 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1197 sdata_info(sdata, 1198 "preparing for channel switch failed, disconnecting\n"); 1199 goto drop_connection; 1200 } 1201 1202 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1203 chanctx->mode, false); 1204 if (res) { 1205 sdata_info(sdata, 1206 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1207 res); 1208 goto drop_connection; 1209 } 1210 mutex_unlock(&local->chanctx_mtx); 1211 1212 sdata->vif.csa_active = true; 1213 sdata->csa_chandef = csa_ie.chandef; 1214 sdata->csa_block_tx = csa_ie.mode; 1215 ifmgd->csa_ignored_same_chan = false; 1216 1217 if (sdata->csa_block_tx) 1218 ieee80211_stop_vif_queues(local, sdata, 1219 IEEE80211_QUEUE_STOP_REASON_CSA); 1220 mutex_unlock(&local->mtx); 1221 1222 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1223 csa_ie.count); 1224 1225 if (local->ops->channel_switch) { 1226 /* use driver's channel switch callback */ 1227 drv_channel_switch(local, sdata, &ch_switch); 1228 return; 1229 } 1230 1231 /* channel switch handled in software */ 1232 if (csa_ie.count <= 1) 1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1234 else 1235 mod_timer(&ifmgd->chswitch_timer, 1236 TU_TO_EXP_TIME((csa_ie.count - 1) * 1237 cbss->beacon_interval)); 1238 return; 1239 drop_connection: 1240 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1241 mutex_unlock(&local->chanctx_mtx); 1242 mutex_unlock(&local->mtx); 1243 } 1244 1245 static bool 1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1247 struct ieee80211_channel *channel, 1248 const u8 *country_ie, u8 country_ie_len, 1249 const u8 *pwr_constr_elem, 1250 int *chan_pwr, int *pwr_reduction) 1251 { 1252 struct ieee80211_country_ie_triplet *triplet; 1253 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1254 int i, chan_increment; 1255 bool have_chan_pwr = false; 1256 1257 /* Invalid IE */ 1258 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1259 return false; 1260 1261 triplet = (void *)(country_ie + 3); 1262 country_ie_len -= 3; 1263 1264 switch (channel->band) { 1265 default: 1266 WARN_ON_ONCE(1); 1267 /* fall through */ 1268 case NL80211_BAND_2GHZ: 1269 case NL80211_BAND_60GHZ: 1270 chan_increment = 1; 1271 break; 1272 case NL80211_BAND_5GHZ: 1273 chan_increment = 4; 1274 break; 1275 } 1276 1277 /* find channel */ 1278 while (country_ie_len >= 3) { 1279 u8 first_channel = triplet->chans.first_channel; 1280 1281 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1282 goto next; 1283 1284 for (i = 0; i < triplet->chans.num_channels; i++) { 1285 if (first_channel + i * chan_increment == chan) { 1286 have_chan_pwr = true; 1287 *chan_pwr = triplet->chans.max_power; 1288 break; 1289 } 1290 } 1291 if (have_chan_pwr) 1292 break; 1293 1294 next: 1295 triplet++; 1296 country_ie_len -= 3; 1297 } 1298 1299 if (have_chan_pwr && pwr_constr_elem) 1300 *pwr_reduction = *pwr_constr_elem; 1301 else 1302 *pwr_reduction = 0; 1303 1304 return have_chan_pwr; 1305 } 1306 1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1308 struct ieee80211_channel *channel, 1309 const u8 *cisco_dtpc_ie, 1310 int *pwr_level) 1311 { 1312 /* From practical testing, the first data byte of the DTPC element 1313 * seems to contain the requested dBm level, and the CLI on Cisco 1314 * APs clearly state the range is -127 to 127 dBm, which indicates 1315 * a signed byte, although it seemingly never actually goes negative. 1316 * The other byte seems to always be zero. 1317 */ 1318 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1319 } 1320 1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1322 struct ieee80211_channel *channel, 1323 struct ieee80211_mgmt *mgmt, 1324 const u8 *country_ie, u8 country_ie_len, 1325 const u8 *pwr_constr_ie, 1326 const u8 *cisco_dtpc_ie) 1327 { 1328 bool has_80211h_pwr = false, has_cisco_pwr = false; 1329 int chan_pwr = 0, pwr_reduction_80211h = 0; 1330 int pwr_level_cisco, pwr_level_80211h; 1331 int new_ap_level; 1332 __le16 capab = mgmt->u.probe_resp.capab_info; 1333 1334 if (country_ie && 1335 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1336 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1337 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1338 sdata, channel, country_ie, country_ie_len, 1339 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1340 pwr_level_80211h = 1341 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1342 } 1343 1344 if (cisco_dtpc_ie) { 1345 ieee80211_find_cisco_dtpc( 1346 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1347 has_cisco_pwr = true; 1348 } 1349 1350 if (!has_80211h_pwr && !has_cisco_pwr) 1351 return 0; 1352 1353 /* If we have both 802.11h and Cisco DTPC, apply both limits 1354 * by picking the smallest of the two power levels advertised. 1355 */ 1356 if (has_80211h_pwr && 1357 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1358 new_ap_level = pwr_level_80211h; 1359 1360 if (sdata->ap_power_level == new_ap_level) 1361 return 0; 1362 1363 sdata_dbg(sdata, 1364 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1365 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1366 sdata->u.mgd.bssid); 1367 } else { /* has_cisco_pwr is always true here. */ 1368 new_ap_level = pwr_level_cisco; 1369 1370 if (sdata->ap_power_level == new_ap_level) 1371 return 0; 1372 1373 sdata_dbg(sdata, 1374 "Limiting TX power to %d dBm as advertised by %pM\n", 1375 pwr_level_cisco, sdata->u.mgd.bssid); 1376 } 1377 1378 sdata->ap_power_level = new_ap_level; 1379 if (__ieee80211_recalc_txpower(sdata)) 1380 return BSS_CHANGED_TXPOWER; 1381 return 0; 1382 } 1383 1384 /* powersave */ 1385 static void ieee80211_enable_ps(struct ieee80211_local *local, 1386 struct ieee80211_sub_if_data *sdata) 1387 { 1388 struct ieee80211_conf *conf = &local->hw.conf; 1389 1390 /* 1391 * If we are scanning right now then the parameters will 1392 * take effect when scan finishes. 1393 */ 1394 if (local->scanning) 1395 return; 1396 1397 if (conf->dynamic_ps_timeout > 0 && 1398 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1399 mod_timer(&local->dynamic_ps_timer, jiffies + 1400 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1401 } else { 1402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1403 ieee80211_send_nullfunc(local, sdata, true); 1404 1405 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1406 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1407 return; 1408 1409 conf->flags |= IEEE80211_CONF_PS; 1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1411 } 1412 } 1413 1414 static void ieee80211_change_ps(struct ieee80211_local *local) 1415 { 1416 struct ieee80211_conf *conf = &local->hw.conf; 1417 1418 if (local->ps_sdata) { 1419 ieee80211_enable_ps(local, local->ps_sdata); 1420 } else if (conf->flags & IEEE80211_CONF_PS) { 1421 conf->flags &= ~IEEE80211_CONF_PS; 1422 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1423 del_timer_sync(&local->dynamic_ps_timer); 1424 cancel_work_sync(&local->dynamic_ps_enable_work); 1425 } 1426 } 1427 1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1429 { 1430 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1431 struct sta_info *sta = NULL; 1432 bool authorized = false; 1433 1434 if (!mgd->powersave) 1435 return false; 1436 1437 if (mgd->broken_ap) 1438 return false; 1439 1440 if (!mgd->associated) 1441 return false; 1442 1443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1444 return false; 1445 1446 if (!mgd->have_beacon) 1447 return false; 1448 1449 rcu_read_lock(); 1450 sta = sta_info_get(sdata, mgd->bssid); 1451 if (sta) 1452 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1453 rcu_read_unlock(); 1454 1455 return authorized; 1456 } 1457 1458 /* need to hold RTNL or interface lock */ 1459 void ieee80211_recalc_ps(struct ieee80211_local *local) 1460 { 1461 struct ieee80211_sub_if_data *sdata, *found = NULL; 1462 int count = 0; 1463 int timeout; 1464 1465 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1466 local->ps_sdata = NULL; 1467 return; 1468 } 1469 1470 list_for_each_entry(sdata, &local->interfaces, list) { 1471 if (!ieee80211_sdata_running(sdata)) 1472 continue; 1473 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1474 /* If an AP vif is found, then disable PS 1475 * by setting the count to zero thereby setting 1476 * ps_sdata to NULL. 1477 */ 1478 count = 0; 1479 break; 1480 } 1481 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1482 continue; 1483 found = sdata; 1484 count++; 1485 } 1486 1487 if (count == 1 && ieee80211_powersave_allowed(found)) { 1488 u8 dtimper = found->u.mgd.dtim_period; 1489 1490 timeout = local->dynamic_ps_forced_timeout; 1491 if (timeout < 0) 1492 timeout = 100; 1493 local->hw.conf.dynamic_ps_timeout = timeout; 1494 1495 /* If the TIM IE is invalid, pretend the value is 1 */ 1496 if (!dtimper) 1497 dtimper = 1; 1498 1499 local->hw.conf.ps_dtim_period = dtimper; 1500 local->ps_sdata = found; 1501 } else { 1502 local->ps_sdata = NULL; 1503 } 1504 1505 ieee80211_change_ps(local); 1506 } 1507 1508 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1509 { 1510 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1511 1512 if (sdata->vif.bss_conf.ps != ps_allowed) { 1513 sdata->vif.bss_conf.ps = ps_allowed; 1514 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1515 } 1516 } 1517 1518 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1519 { 1520 struct ieee80211_local *local = 1521 container_of(work, struct ieee80211_local, 1522 dynamic_ps_disable_work); 1523 1524 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1525 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1526 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1527 } 1528 1529 ieee80211_wake_queues_by_reason(&local->hw, 1530 IEEE80211_MAX_QUEUE_MAP, 1531 IEEE80211_QUEUE_STOP_REASON_PS, 1532 false); 1533 } 1534 1535 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1536 { 1537 struct ieee80211_local *local = 1538 container_of(work, struct ieee80211_local, 1539 dynamic_ps_enable_work); 1540 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1541 struct ieee80211_if_managed *ifmgd; 1542 unsigned long flags; 1543 int q; 1544 1545 /* can only happen when PS was just disabled anyway */ 1546 if (!sdata) 1547 return; 1548 1549 ifmgd = &sdata->u.mgd; 1550 1551 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1552 return; 1553 1554 if (local->hw.conf.dynamic_ps_timeout > 0) { 1555 /* don't enter PS if TX frames are pending */ 1556 if (drv_tx_frames_pending(local)) { 1557 mod_timer(&local->dynamic_ps_timer, jiffies + 1558 msecs_to_jiffies( 1559 local->hw.conf.dynamic_ps_timeout)); 1560 return; 1561 } 1562 1563 /* 1564 * transmission can be stopped by others which leads to 1565 * dynamic_ps_timer expiry. Postpone the ps timer if it 1566 * is not the actual idle state. 1567 */ 1568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1569 for (q = 0; q < local->hw.queues; q++) { 1570 if (local->queue_stop_reasons[q]) { 1571 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1572 flags); 1573 mod_timer(&local->dynamic_ps_timer, jiffies + 1574 msecs_to_jiffies( 1575 local->hw.conf.dynamic_ps_timeout)); 1576 return; 1577 } 1578 } 1579 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1580 } 1581 1582 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1583 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1584 if (drv_tx_frames_pending(local)) { 1585 mod_timer(&local->dynamic_ps_timer, jiffies + 1586 msecs_to_jiffies( 1587 local->hw.conf.dynamic_ps_timeout)); 1588 } else { 1589 ieee80211_send_nullfunc(local, sdata, true); 1590 /* Flush to get the tx status of nullfunc frame */ 1591 ieee80211_flush_queues(local, sdata, false); 1592 } 1593 } 1594 1595 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1596 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1597 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1598 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1599 local->hw.conf.flags |= IEEE80211_CONF_PS; 1600 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1601 } 1602 } 1603 1604 void ieee80211_dynamic_ps_timer(unsigned long data) 1605 { 1606 struct ieee80211_local *local = (void *) data; 1607 1608 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1609 } 1610 1611 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1612 { 1613 struct delayed_work *delayed_work = to_delayed_work(work); 1614 struct ieee80211_sub_if_data *sdata = 1615 container_of(delayed_work, struct ieee80211_sub_if_data, 1616 dfs_cac_timer_work); 1617 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1618 1619 mutex_lock(&sdata->local->mtx); 1620 if (sdata->wdev.cac_started) { 1621 ieee80211_vif_release_channel(sdata); 1622 cfg80211_cac_event(sdata->dev, &chandef, 1623 NL80211_RADAR_CAC_FINISHED, 1624 GFP_KERNEL); 1625 } 1626 mutex_unlock(&sdata->local->mtx); 1627 } 1628 1629 static bool 1630 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1631 { 1632 struct ieee80211_local *local = sdata->local; 1633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1634 bool ret = false; 1635 int ac; 1636 1637 if (local->hw.queues < IEEE80211_NUM_ACS) 1638 return false; 1639 1640 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1641 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1642 int non_acm_ac; 1643 unsigned long now = jiffies; 1644 1645 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1646 tx_tspec->admitted_time && 1647 time_after(now, tx_tspec->time_slice_start + HZ)) { 1648 tx_tspec->consumed_tx_time = 0; 1649 tx_tspec->time_slice_start = now; 1650 1651 if (tx_tspec->downgraded) 1652 tx_tspec->action = 1653 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1654 } 1655 1656 switch (tx_tspec->action) { 1657 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1658 /* take the original parameters */ 1659 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1660 sdata_err(sdata, 1661 "failed to set TX queue parameters for queue %d\n", 1662 ac); 1663 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1664 tx_tspec->downgraded = false; 1665 ret = true; 1666 break; 1667 case TX_TSPEC_ACTION_DOWNGRADE: 1668 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1669 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1670 ret = true; 1671 break; 1672 } 1673 /* downgrade next lower non-ACM AC */ 1674 for (non_acm_ac = ac + 1; 1675 non_acm_ac < IEEE80211_NUM_ACS; 1676 non_acm_ac++) 1677 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1678 break; 1679 /* Usually the loop will result in using BK even if it 1680 * requires admission control, but such a configuration 1681 * makes no sense and we have to transmit somehow - the 1682 * AC selection does the same thing. 1683 * If we started out trying to downgrade from BK, then 1684 * the extra condition here might be needed. 1685 */ 1686 if (non_acm_ac >= IEEE80211_NUM_ACS) 1687 non_acm_ac = IEEE80211_AC_BK; 1688 if (drv_conf_tx(local, sdata, ac, 1689 &sdata->tx_conf[non_acm_ac])) 1690 sdata_err(sdata, 1691 "failed to set TX queue parameters for queue %d\n", 1692 ac); 1693 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1694 ret = true; 1695 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1696 tx_tspec->time_slice_start + HZ - now + 1); 1697 break; 1698 case TX_TSPEC_ACTION_NONE: 1699 /* nothing now */ 1700 break; 1701 } 1702 } 1703 1704 return ret; 1705 } 1706 1707 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1708 { 1709 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1710 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1711 } 1712 1713 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1714 { 1715 struct ieee80211_sub_if_data *sdata; 1716 1717 sdata = container_of(work, struct ieee80211_sub_if_data, 1718 u.mgd.tx_tspec_wk.work); 1719 ieee80211_sta_handle_tspec_ac_params(sdata); 1720 } 1721 1722 /* MLME */ 1723 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1724 struct ieee80211_sub_if_data *sdata, 1725 const u8 *wmm_param, size_t wmm_param_len) 1726 { 1727 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1729 size_t left; 1730 int count, ac; 1731 const u8 *pos; 1732 u8 uapsd_queues = 0; 1733 1734 if (!local->ops->conf_tx) 1735 return false; 1736 1737 if (local->hw.queues < IEEE80211_NUM_ACS) 1738 return false; 1739 1740 if (!wmm_param) 1741 return false; 1742 1743 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1744 return false; 1745 1746 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1747 uapsd_queues = ifmgd->uapsd_queues; 1748 1749 count = wmm_param[6] & 0x0f; 1750 if (count == ifmgd->wmm_last_param_set) 1751 return false; 1752 ifmgd->wmm_last_param_set = count; 1753 1754 pos = wmm_param + 8; 1755 left = wmm_param_len - 8; 1756 1757 memset(¶ms, 0, sizeof(params)); 1758 1759 sdata->wmm_acm = 0; 1760 for (; left >= 4; left -= 4, pos += 4) { 1761 int aci = (pos[0] >> 5) & 0x03; 1762 int acm = (pos[0] >> 4) & 0x01; 1763 bool uapsd = false; 1764 1765 switch (aci) { 1766 case 1: /* AC_BK */ 1767 ac = IEEE80211_AC_BK; 1768 if (acm) 1769 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1770 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1771 uapsd = true; 1772 break; 1773 case 2: /* AC_VI */ 1774 ac = IEEE80211_AC_VI; 1775 if (acm) 1776 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1777 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1778 uapsd = true; 1779 break; 1780 case 3: /* AC_VO */ 1781 ac = IEEE80211_AC_VO; 1782 if (acm) 1783 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1784 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1785 uapsd = true; 1786 break; 1787 case 0: /* AC_BE */ 1788 default: 1789 ac = IEEE80211_AC_BE; 1790 if (acm) 1791 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1793 uapsd = true; 1794 break; 1795 } 1796 1797 params[ac].aifs = pos[0] & 0x0f; 1798 1799 if (params[ac].aifs < 2) { 1800 sdata_info(sdata, 1801 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1802 params[ac].aifs, aci); 1803 params[ac].aifs = 2; 1804 } 1805 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1806 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1807 params[ac].txop = get_unaligned_le16(pos + 2); 1808 params[ac].acm = acm; 1809 params[ac].uapsd = uapsd; 1810 1811 if (params[ac].cw_min > params[ac].cw_max) { 1812 sdata_info(sdata, 1813 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1814 params[ac].cw_min, params[ac].cw_max, aci); 1815 return false; 1816 } 1817 } 1818 1819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1820 mlme_dbg(sdata, 1821 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1822 ac, params[ac].acm, 1823 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1824 params[ac].txop, params[ac].uapsd, 1825 ifmgd->tx_tspec[ac].downgraded); 1826 sdata->tx_conf[ac] = params[ac]; 1827 if (!ifmgd->tx_tspec[ac].downgraded && 1828 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1829 sdata_err(sdata, 1830 "failed to set TX queue parameters for AC %d\n", 1831 ac); 1832 } 1833 1834 /* enable WMM or activate new settings */ 1835 sdata->vif.bss_conf.qos = true; 1836 return true; 1837 } 1838 1839 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1840 { 1841 lockdep_assert_held(&sdata->local->mtx); 1842 1843 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1844 ieee80211_run_deferred_scan(sdata->local); 1845 } 1846 1847 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1848 { 1849 mutex_lock(&sdata->local->mtx); 1850 __ieee80211_stop_poll(sdata); 1851 mutex_unlock(&sdata->local->mtx); 1852 } 1853 1854 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1855 u16 capab, bool erp_valid, u8 erp) 1856 { 1857 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1858 struct ieee80211_supported_band *sband; 1859 u32 changed = 0; 1860 bool use_protection; 1861 bool use_short_preamble; 1862 bool use_short_slot; 1863 1864 sband = ieee80211_get_sband(sdata); 1865 if (!sband) 1866 return changed; 1867 1868 if (erp_valid) { 1869 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1870 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1871 } else { 1872 use_protection = false; 1873 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1874 } 1875 1876 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1877 if (sband->band == NL80211_BAND_5GHZ) 1878 use_short_slot = true; 1879 1880 if (use_protection != bss_conf->use_cts_prot) { 1881 bss_conf->use_cts_prot = use_protection; 1882 changed |= BSS_CHANGED_ERP_CTS_PROT; 1883 } 1884 1885 if (use_short_preamble != bss_conf->use_short_preamble) { 1886 bss_conf->use_short_preamble = use_short_preamble; 1887 changed |= BSS_CHANGED_ERP_PREAMBLE; 1888 } 1889 1890 if (use_short_slot != bss_conf->use_short_slot) { 1891 bss_conf->use_short_slot = use_short_slot; 1892 changed |= BSS_CHANGED_ERP_SLOT; 1893 } 1894 1895 return changed; 1896 } 1897 1898 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1899 struct cfg80211_bss *cbss, 1900 u32 bss_info_changed) 1901 { 1902 struct ieee80211_bss *bss = (void *)cbss->priv; 1903 struct ieee80211_local *local = sdata->local; 1904 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1905 1906 bss_info_changed |= BSS_CHANGED_ASSOC; 1907 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1908 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1909 1910 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1911 beacon_loss_count * bss_conf->beacon_int)); 1912 1913 sdata->u.mgd.associated = cbss; 1914 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1915 1916 ieee80211_check_rate_mask(sdata); 1917 1918 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1919 1920 if (sdata->vif.p2p || 1921 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 1922 const struct cfg80211_bss_ies *ies; 1923 1924 rcu_read_lock(); 1925 ies = rcu_dereference(cbss->ies); 1926 if (ies) { 1927 int ret; 1928 1929 ret = cfg80211_get_p2p_attr( 1930 ies->data, ies->len, 1931 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1932 (u8 *) &bss_conf->p2p_noa_attr, 1933 sizeof(bss_conf->p2p_noa_attr)); 1934 if (ret >= 2) { 1935 sdata->u.mgd.p2p_noa_index = 1936 bss_conf->p2p_noa_attr.index; 1937 bss_info_changed |= BSS_CHANGED_P2P_PS; 1938 } 1939 } 1940 rcu_read_unlock(); 1941 } 1942 1943 /* just to be sure */ 1944 ieee80211_stop_poll(sdata); 1945 1946 ieee80211_led_assoc(local, 1); 1947 1948 if (sdata->u.mgd.have_beacon) { 1949 /* 1950 * If the AP is buggy we may get here with no DTIM period 1951 * known, so assume it's 1 which is the only safe assumption 1952 * in that case, although if the TIM IE is broken powersave 1953 * probably just won't work at all. 1954 */ 1955 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1956 bss_conf->beacon_rate = bss->beacon_rate; 1957 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1958 } else { 1959 bss_conf->beacon_rate = NULL; 1960 bss_conf->dtim_period = 0; 1961 } 1962 1963 bss_conf->assoc = 1; 1964 1965 /* Tell the driver to monitor connection quality (if supported) */ 1966 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1967 bss_conf->cqm_rssi_thold) 1968 bss_info_changed |= BSS_CHANGED_CQM; 1969 1970 /* Enable ARP filtering */ 1971 if (bss_conf->arp_addr_cnt) 1972 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1973 1974 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1975 1976 mutex_lock(&local->iflist_mtx); 1977 ieee80211_recalc_ps(local); 1978 mutex_unlock(&local->iflist_mtx); 1979 1980 ieee80211_recalc_smps(sdata); 1981 ieee80211_recalc_ps_vif(sdata); 1982 1983 netif_carrier_on(sdata->dev); 1984 } 1985 1986 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1987 u16 stype, u16 reason, bool tx, 1988 u8 *frame_buf) 1989 { 1990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1991 struct ieee80211_local *local = sdata->local; 1992 u32 changed = 0; 1993 1994 sdata_assert_lock(sdata); 1995 1996 if (WARN_ON_ONCE(tx && !frame_buf)) 1997 return; 1998 1999 if (WARN_ON(!ifmgd->associated)) 2000 return; 2001 2002 ieee80211_stop_poll(sdata); 2003 2004 ifmgd->associated = NULL; 2005 netif_carrier_off(sdata->dev); 2006 2007 /* 2008 * if we want to get out of ps before disassoc (why?) we have 2009 * to do it before sending disassoc, as otherwise the null-packet 2010 * won't be valid. 2011 */ 2012 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2013 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2014 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2015 } 2016 local->ps_sdata = NULL; 2017 2018 /* disable per-vif ps */ 2019 ieee80211_recalc_ps_vif(sdata); 2020 2021 /* make sure ongoing transmission finishes */ 2022 synchronize_net(); 2023 2024 /* 2025 * drop any frame before deauth/disassoc, this can be data or 2026 * management frame. Since we are disconnecting, we should not 2027 * insist sending these frames which can take time and delay 2028 * the disconnection and possible the roaming. 2029 */ 2030 if (tx) 2031 ieee80211_flush_queues(local, sdata, true); 2032 2033 /* deauthenticate/disassociate now */ 2034 if (tx || frame_buf) 2035 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2036 reason, tx, frame_buf); 2037 2038 /* flush out frame - make sure the deauth was actually sent */ 2039 if (tx) 2040 ieee80211_flush_queues(local, sdata, false); 2041 2042 /* clear bssid only after building the needed mgmt frames */ 2043 eth_zero_addr(ifmgd->bssid); 2044 2045 /* remove AP and TDLS peers */ 2046 sta_info_flush(sdata); 2047 2048 /* finally reset all BSS / config parameters */ 2049 changed |= ieee80211_reset_erp_info(sdata); 2050 2051 ieee80211_led_assoc(local, 0); 2052 changed |= BSS_CHANGED_ASSOC; 2053 sdata->vif.bss_conf.assoc = false; 2054 2055 ifmgd->p2p_noa_index = -1; 2056 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2057 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2058 2059 /* on the next assoc, re-program HT/VHT parameters */ 2060 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2061 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2062 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2063 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2064 2065 /* reset MU-MIMO ownership and group data */ 2066 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2067 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2068 memset(sdata->vif.bss_conf.mu_group.position, 0, 2069 sizeof(sdata->vif.bss_conf.mu_group.position)); 2070 changed |= BSS_CHANGED_MU_GROUPS; 2071 sdata->vif.mu_mimo_owner = false; 2072 2073 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2074 2075 del_timer_sync(&local->dynamic_ps_timer); 2076 cancel_work_sync(&local->dynamic_ps_enable_work); 2077 2078 /* Disable ARP filtering */ 2079 if (sdata->vif.bss_conf.arp_addr_cnt) 2080 changed |= BSS_CHANGED_ARP_FILTER; 2081 2082 sdata->vif.bss_conf.qos = false; 2083 changed |= BSS_CHANGED_QOS; 2084 2085 /* The BSSID (not really interesting) and HT changed */ 2086 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2087 ieee80211_bss_info_change_notify(sdata, changed); 2088 2089 /* disassociated - set to defaults now */ 2090 ieee80211_set_wmm_default(sdata, false, false); 2091 2092 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2093 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2094 del_timer_sync(&sdata->u.mgd.timer); 2095 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2096 2097 sdata->vif.bss_conf.dtim_period = 0; 2098 sdata->vif.bss_conf.beacon_rate = NULL; 2099 2100 ifmgd->have_beacon = false; 2101 2102 ifmgd->flags = 0; 2103 mutex_lock(&local->mtx); 2104 ieee80211_vif_release_channel(sdata); 2105 2106 sdata->vif.csa_active = false; 2107 ifmgd->csa_waiting_bcn = false; 2108 ifmgd->csa_ignored_same_chan = false; 2109 if (sdata->csa_block_tx) { 2110 ieee80211_wake_vif_queues(local, sdata, 2111 IEEE80211_QUEUE_STOP_REASON_CSA); 2112 sdata->csa_block_tx = false; 2113 } 2114 mutex_unlock(&local->mtx); 2115 2116 /* existing TX TSPEC sessions no longer exist */ 2117 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2118 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2119 2120 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2121 } 2122 2123 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2124 struct ieee80211_hdr *hdr) 2125 { 2126 /* 2127 * We can postpone the mgd.timer whenever receiving unicast frames 2128 * from AP because we know that the connection is working both ways 2129 * at that time. But multicast frames (and hence also beacons) must 2130 * be ignored here, because we need to trigger the timer during 2131 * data idle periods for sending the periodic probe request to the 2132 * AP we're connected to. 2133 */ 2134 if (is_multicast_ether_addr(hdr->addr1)) 2135 return; 2136 2137 ieee80211_sta_reset_conn_monitor(sdata); 2138 } 2139 2140 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2141 { 2142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2143 struct ieee80211_local *local = sdata->local; 2144 2145 mutex_lock(&local->mtx); 2146 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2147 goto out; 2148 2149 __ieee80211_stop_poll(sdata); 2150 2151 mutex_lock(&local->iflist_mtx); 2152 ieee80211_recalc_ps(local); 2153 mutex_unlock(&local->iflist_mtx); 2154 2155 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2156 goto out; 2157 2158 /* 2159 * We've received a probe response, but are not sure whether 2160 * we have or will be receiving any beacons or data, so let's 2161 * schedule the timers again, just in case. 2162 */ 2163 ieee80211_sta_reset_beacon_monitor(sdata); 2164 2165 mod_timer(&ifmgd->conn_mon_timer, 2166 round_jiffies_up(jiffies + 2167 IEEE80211_CONNECTION_IDLE_TIME)); 2168 out: 2169 mutex_unlock(&local->mtx); 2170 } 2171 2172 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2173 struct ieee80211_hdr *hdr, 2174 u16 tx_time) 2175 { 2176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2177 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 2178 int ac = ieee80211_ac_from_tid(tid); 2179 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2180 unsigned long now = jiffies; 2181 2182 if (likely(!tx_tspec->admitted_time)) 2183 return; 2184 2185 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2186 tx_tspec->consumed_tx_time = 0; 2187 tx_tspec->time_slice_start = now; 2188 2189 if (tx_tspec->downgraded) { 2190 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2191 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2192 } 2193 } 2194 2195 if (tx_tspec->downgraded) 2196 return; 2197 2198 tx_tspec->consumed_tx_time += tx_time; 2199 2200 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2201 tx_tspec->downgraded = true; 2202 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2203 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2204 } 2205 } 2206 2207 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2208 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2209 { 2210 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2211 2212 if (!ieee80211_is_data(hdr->frame_control)) 2213 return; 2214 2215 if (ieee80211_is_nullfunc(hdr->frame_control) && 2216 sdata->u.mgd.probe_send_count > 0) { 2217 if (ack) 2218 ieee80211_sta_reset_conn_monitor(sdata); 2219 else 2220 sdata->u.mgd.nullfunc_failed = true; 2221 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2222 return; 2223 } 2224 2225 if (ack) 2226 ieee80211_sta_reset_conn_monitor(sdata); 2227 } 2228 2229 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2230 { 2231 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2232 const u8 *ssid; 2233 u8 *dst = ifmgd->associated->bssid; 2234 u8 unicast_limit = max(1, max_probe_tries - 3); 2235 struct sta_info *sta; 2236 2237 /* 2238 * Try sending broadcast probe requests for the last three 2239 * probe requests after the first ones failed since some 2240 * buggy APs only support broadcast probe requests. 2241 */ 2242 if (ifmgd->probe_send_count >= unicast_limit) 2243 dst = NULL; 2244 2245 /* 2246 * When the hardware reports an accurate Tx ACK status, it's 2247 * better to send a nullfunc frame instead of a probe request, 2248 * as it will kick us off the AP quickly if we aren't associated 2249 * anymore. The timeout will be reset if the frame is ACKed by 2250 * the AP. 2251 */ 2252 ifmgd->probe_send_count++; 2253 2254 if (dst) { 2255 mutex_lock(&sdata->local->sta_mtx); 2256 sta = sta_info_get(sdata, dst); 2257 if (!WARN_ON(!sta)) 2258 ieee80211_check_fast_rx(sta); 2259 mutex_unlock(&sdata->local->sta_mtx); 2260 } 2261 2262 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2263 ifmgd->nullfunc_failed = false; 2264 ieee80211_send_nullfunc(sdata->local, sdata, false); 2265 } else { 2266 int ssid_len; 2267 2268 rcu_read_lock(); 2269 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2270 if (WARN_ON_ONCE(ssid == NULL)) 2271 ssid_len = 0; 2272 else 2273 ssid_len = ssid[1]; 2274 2275 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2276 ssid + 2, ssid_len, NULL, 2277 0, (u32) -1, true, 0, 2278 ifmgd->associated->channel, false); 2279 rcu_read_unlock(); 2280 } 2281 2282 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2283 run_again(sdata, ifmgd->probe_timeout); 2284 } 2285 2286 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2287 bool beacon) 2288 { 2289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2290 bool already = false; 2291 2292 if (!ieee80211_sdata_running(sdata)) 2293 return; 2294 2295 sdata_lock(sdata); 2296 2297 if (!ifmgd->associated) 2298 goto out; 2299 2300 mutex_lock(&sdata->local->mtx); 2301 2302 if (sdata->local->tmp_channel || sdata->local->scanning) { 2303 mutex_unlock(&sdata->local->mtx); 2304 goto out; 2305 } 2306 2307 if (beacon) { 2308 mlme_dbg_ratelimited(sdata, 2309 "detected beacon loss from AP (missed %d beacons) - probing\n", 2310 beacon_loss_count); 2311 2312 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2313 } 2314 2315 /* 2316 * The driver/our work has already reported this event or the 2317 * connection monitoring has kicked in and we have already sent 2318 * a probe request. Or maybe the AP died and the driver keeps 2319 * reporting until we disassociate... 2320 * 2321 * In either case we have to ignore the current call to this 2322 * function (except for setting the correct probe reason bit) 2323 * because otherwise we would reset the timer every time and 2324 * never check whether we received a probe response! 2325 */ 2326 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2327 already = true; 2328 2329 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2330 2331 mutex_unlock(&sdata->local->mtx); 2332 2333 if (already) 2334 goto out; 2335 2336 mutex_lock(&sdata->local->iflist_mtx); 2337 ieee80211_recalc_ps(sdata->local); 2338 mutex_unlock(&sdata->local->iflist_mtx); 2339 2340 ifmgd->probe_send_count = 0; 2341 ieee80211_mgd_probe_ap_send(sdata); 2342 out: 2343 sdata_unlock(sdata); 2344 } 2345 2346 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2347 struct ieee80211_vif *vif) 2348 { 2349 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2351 struct cfg80211_bss *cbss; 2352 struct sk_buff *skb; 2353 const u8 *ssid; 2354 int ssid_len; 2355 2356 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2357 return NULL; 2358 2359 sdata_assert_lock(sdata); 2360 2361 if (ifmgd->associated) 2362 cbss = ifmgd->associated; 2363 else if (ifmgd->auth_data) 2364 cbss = ifmgd->auth_data->bss; 2365 else if (ifmgd->assoc_data) 2366 cbss = ifmgd->assoc_data->bss; 2367 else 2368 return NULL; 2369 2370 rcu_read_lock(); 2371 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2372 if (WARN_ON_ONCE(ssid == NULL)) 2373 ssid_len = 0; 2374 else 2375 ssid_len = ssid[1]; 2376 2377 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2378 (u32) -1, cbss->channel, 2379 ssid + 2, ssid_len, 2380 NULL, 0, true); 2381 rcu_read_unlock(); 2382 2383 return skb; 2384 } 2385 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2386 2387 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2388 const u8 *buf, size_t len, bool tx, 2389 u16 reason) 2390 { 2391 struct ieee80211_event event = { 2392 .type = MLME_EVENT, 2393 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2394 .u.mlme.reason = reason, 2395 }; 2396 2397 if (tx) 2398 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2399 else 2400 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2401 2402 drv_event_callback(sdata->local, sdata, &event); 2403 } 2404 2405 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2406 { 2407 struct ieee80211_local *local = sdata->local; 2408 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2409 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2410 2411 sdata_lock(sdata); 2412 if (!ifmgd->associated) { 2413 sdata_unlock(sdata); 2414 return; 2415 } 2416 2417 /* AP is probably out of range (or not reachable for another reason) so 2418 * remove the bss struct for that AP. 2419 */ 2420 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2421 2422 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2423 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2424 true, frame_buf); 2425 mutex_lock(&local->mtx); 2426 sdata->vif.csa_active = false; 2427 ifmgd->csa_waiting_bcn = false; 2428 if (sdata->csa_block_tx) { 2429 ieee80211_wake_vif_queues(local, sdata, 2430 IEEE80211_QUEUE_STOP_REASON_CSA); 2431 sdata->csa_block_tx = false; 2432 } 2433 mutex_unlock(&local->mtx); 2434 2435 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2436 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2437 2438 sdata_unlock(sdata); 2439 } 2440 2441 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2442 { 2443 struct ieee80211_sub_if_data *sdata = 2444 container_of(work, struct ieee80211_sub_if_data, 2445 u.mgd.beacon_connection_loss_work); 2446 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2447 2448 if (ifmgd->associated) 2449 ifmgd->beacon_loss_count++; 2450 2451 if (ifmgd->connection_loss) { 2452 sdata_info(sdata, "Connection to AP %pM lost\n", 2453 ifmgd->bssid); 2454 __ieee80211_disconnect(sdata); 2455 } else { 2456 ieee80211_mgd_probe_ap(sdata, true); 2457 } 2458 } 2459 2460 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2461 { 2462 struct ieee80211_sub_if_data *sdata = 2463 container_of(work, struct ieee80211_sub_if_data, 2464 u.mgd.csa_connection_drop_work); 2465 2466 __ieee80211_disconnect(sdata); 2467 } 2468 2469 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2470 { 2471 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2472 struct ieee80211_hw *hw = &sdata->local->hw; 2473 2474 trace_api_beacon_loss(sdata); 2475 2476 sdata->u.mgd.connection_loss = false; 2477 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2478 } 2479 EXPORT_SYMBOL(ieee80211_beacon_loss); 2480 2481 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2482 { 2483 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2484 struct ieee80211_hw *hw = &sdata->local->hw; 2485 2486 trace_api_connection_loss(sdata); 2487 2488 sdata->u.mgd.connection_loss = true; 2489 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2490 } 2491 EXPORT_SYMBOL(ieee80211_connection_loss); 2492 2493 2494 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2495 bool assoc) 2496 { 2497 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2498 2499 sdata_assert_lock(sdata); 2500 2501 if (!assoc) { 2502 /* 2503 * we are not authenticated yet, the only timer that could be 2504 * running is the timeout for the authentication response which 2505 * which is not relevant anymore. 2506 */ 2507 del_timer_sync(&sdata->u.mgd.timer); 2508 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2509 2510 eth_zero_addr(sdata->u.mgd.bssid); 2511 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2512 sdata->u.mgd.flags = 0; 2513 mutex_lock(&sdata->local->mtx); 2514 ieee80211_vif_release_channel(sdata); 2515 mutex_unlock(&sdata->local->mtx); 2516 } 2517 2518 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2519 kfree(auth_data); 2520 sdata->u.mgd.auth_data = NULL; 2521 } 2522 2523 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2524 bool assoc, bool abandon) 2525 { 2526 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2527 2528 sdata_assert_lock(sdata); 2529 2530 if (!assoc) { 2531 /* 2532 * we are not associated yet, the only timer that could be 2533 * running is the timeout for the association response which 2534 * which is not relevant anymore. 2535 */ 2536 del_timer_sync(&sdata->u.mgd.timer); 2537 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2538 2539 eth_zero_addr(sdata->u.mgd.bssid); 2540 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2541 sdata->u.mgd.flags = 0; 2542 sdata->vif.mu_mimo_owner = false; 2543 2544 mutex_lock(&sdata->local->mtx); 2545 ieee80211_vif_release_channel(sdata); 2546 mutex_unlock(&sdata->local->mtx); 2547 2548 if (abandon) 2549 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2550 } 2551 2552 kfree(assoc_data); 2553 sdata->u.mgd.assoc_data = NULL; 2554 } 2555 2556 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2557 struct ieee80211_mgmt *mgmt, size_t len) 2558 { 2559 struct ieee80211_local *local = sdata->local; 2560 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2561 u8 *pos; 2562 struct ieee802_11_elems elems; 2563 u32 tx_flags = 0; 2564 2565 pos = mgmt->u.auth.variable; 2566 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2567 if (!elems.challenge) 2568 return; 2569 auth_data->expected_transaction = 4; 2570 drv_mgd_prepare_tx(sdata->local, sdata); 2571 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2572 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2573 IEEE80211_TX_INTFL_MLME_CONN_TX; 2574 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2575 elems.challenge - 2, elems.challenge_len + 2, 2576 auth_data->bss->bssid, auth_data->bss->bssid, 2577 auth_data->key, auth_data->key_len, 2578 auth_data->key_idx, tx_flags); 2579 } 2580 2581 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2582 struct ieee80211_mgmt *mgmt, size_t len) 2583 { 2584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2585 u8 bssid[ETH_ALEN]; 2586 u16 auth_alg, auth_transaction, status_code; 2587 struct sta_info *sta; 2588 struct ieee80211_event event = { 2589 .type = MLME_EVENT, 2590 .u.mlme.data = AUTH_EVENT, 2591 }; 2592 2593 sdata_assert_lock(sdata); 2594 2595 if (len < 24 + 6) 2596 return; 2597 2598 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2599 return; 2600 2601 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2602 2603 if (!ether_addr_equal(bssid, mgmt->bssid)) 2604 return; 2605 2606 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2607 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2608 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2609 2610 if (auth_alg != ifmgd->auth_data->algorithm || 2611 auth_transaction != ifmgd->auth_data->expected_transaction) { 2612 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2613 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2614 auth_transaction, 2615 ifmgd->auth_data->expected_transaction); 2616 return; 2617 } 2618 2619 if (status_code != WLAN_STATUS_SUCCESS) { 2620 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2621 mgmt->sa, status_code); 2622 ieee80211_destroy_auth_data(sdata, false); 2623 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2624 event.u.mlme.status = MLME_DENIED; 2625 event.u.mlme.reason = status_code; 2626 drv_event_callback(sdata->local, sdata, &event); 2627 return; 2628 } 2629 2630 switch (ifmgd->auth_data->algorithm) { 2631 case WLAN_AUTH_OPEN: 2632 case WLAN_AUTH_LEAP: 2633 case WLAN_AUTH_FT: 2634 case WLAN_AUTH_SAE: 2635 case WLAN_AUTH_FILS_SK: 2636 case WLAN_AUTH_FILS_SK_PFS: 2637 case WLAN_AUTH_FILS_PK: 2638 break; 2639 case WLAN_AUTH_SHARED_KEY: 2640 if (ifmgd->auth_data->expected_transaction != 4) { 2641 ieee80211_auth_challenge(sdata, mgmt, len); 2642 /* need another frame */ 2643 return; 2644 } 2645 break; 2646 default: 2647 WARN_ONCE(1, "invalid auth alg %d", 2648 ifmgd->auth_data->algorithm); 2649 return; 2650 } 2651 2652 event.u.mlme.status = MLME_SUCCESS; 2653 drv_event_callback(sdata->local, sdata, &event); 2654 sdata_info(sdata, "authenticated\n"); 2655 ifmgd->auth_data->done = true; 2656 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2657 ifmgd->auth_data->timeout_started = true; 2658 run_again(sdata, ifmgd->auth_data->timeout); 2659 2660 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2661 ifmgd->auth_data->expected_transaction != 2) { 2662 /* 2663 * Report auth frame to user space for processing since another 2664 * round of Authentication frames is still needed. 2665 */ 2666 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2667 return; 2668 } 2669 2670 /* move station state to auth */ 2671 mutex_lock(&sdata->local->sta_mtx); 2672 sta = sta_info_get(sdata, bssid); 2673 if (!sta) { 2674 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2675 goto out_err; 2676 } 2677 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2678 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2679 goto out_err; 2680 } 2681 mutex_unlock(&sdata->local->sta_mtx); 2682 2683 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2684 return; 2685 out_err: 2686 mutex_unlock(&sdata->local->sta_mtx); 2687 /* ignore frame -- wait for timeout */ 2688 } 2689 2690 #define case_WLAN(type) \ 2691 case WLAN_REASON_##type: return #type 2692 2693 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2694 { 2695 switch (reason_code) { 2696 case_WLAN(UNSPECIFIED); 2697 case_WLAN(PREV_AUTH_NOT_VALID); 2698 case_WLAN(DEAUTH_LEAVING); 2699 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2700 case_WLAN(DISASSOC_AP_BUSY); 2701 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2702 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2703 case_WLAN(DISASSOC_STA_HAS_LEFT); 2704 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2705 case_WLAN(DISASSOC_BAD_POWER); 2706 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2707 case_WLAN(INVALID_IE); 2708 case_WLAN(MIC_FAILURE); 2709 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2710 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2711 case_WLAN(IE_DIFFERENT); 2712 case_WLAN(INVALID_GROUP_CIPHER); 2713 case_WLAN(INVALID_PAIRWISE_CIPHER); 2714 case_WLAN(INVALID_AKMP); 2715 case_WLAN(UNSUPP_RSN_VERSION); 2716 case_WLAN(INVALID_RSN_IE_CAP); 2717 case_WLAN(IEEE8021X_FAILED); 2718 case_WLAN(CIPHER_SUITE_REJECTED); 2719 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2720 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2721 case_WLAN(DISASSOC_LOW_ACK); 2722 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2723 case_WLAN(QSTA_LEAVE_QBSS); 2724 case_WLAN(QSTA_NOT_USE); 2725 case_WLAN(QSTA_REQUIRE_SETUP); 2726 case_WLAN(QSTA_TIMEOUT); 2727 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2728 case_WLAN(MESH_PEER_CANCELED); 2729 case_WLAN(MESH_MAX_PEERS); 2730 case_WLAN(MESH_CONFIG); 2731 case_WLAN(MESH_CLOSE); 2732 case_WLAN(MESH_MAX_RETRIES); 2733 case_WLAN(MESH_CONFIRM_TIMEOUT); 2734 case_WLAN(MESH_INVALID_GTK); 2735 case_WLAN(MESH_INCONSISTENT_PARAM); 2736 case_WLAN(MESH_INVALID_SECURITY); 2737 case_WLAN(MESH_PATH_ERROR); 2738 case_WLAN(MESH_PATH_NOFORWARD); 2739 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2740 case_WLAN(MAC_EXISTS_IN_MBSS); 2741 case_WLAN(MESH_CHAN_REGULATORY); 2742 case_WLAN(MESH_CHAN); 2743 default: return "<unknown>"; 2744 } 2745 } 2746 2747 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2748 struct ieee80211_mgmt *mgmt, size_t len) 2749 { 2750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2751 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2752 2753 sdata_assert_lock(sdata); 2754 2755 if (len < 24 + 2) 2756 return; 2757 2758 if (ifmgd->associated && 2759 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2760 const u8 *bssid = ifmgd->associated->bssid; 2761 2762 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2763 bssid, reason_code, 2764 ieee80211_get_reason_code_string(reason_code)); 2765 2766 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2767 2768 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2769 reason_code); 2770 return; 2771 } 2772 2773 if (ifmgd->assoc_data && 2774 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2775 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2776 2777 sdata_info(sdata, 2778 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2779 bssid, reason_code, 2780 ieee80211_get_reason_code_string(reason_code)); 2781 2782 ieee80211_destroy_assoc_data(sdata, false, true); 2783 2784 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2785 return; 2786 } 2787 } 2788 2789 2790 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2791 struct ieee80211_mgmt *mgmt, size_t len) 2792 { 2793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2794 u16 reason_code; 2795 2796 sdata_assert_lock(sdata); 2797 2798 if (len < 24 + 2) 2799 return; 2800 2801 if (!ifmgd->associated || 2802 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2803 return; 2804 2805 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2806 2807 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2808 mgmt->sa, reason_code, 2809 ieee80211_get_reason_code_string(reason_code)); 2810 2811 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2812 2813 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2814 } 2815 2816 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2817 u8 *supp_rates, unsigned int supp_rates_len, 2818 u32 *rates, u32 *basic_rates, 2819 bool *have_higher_than_11mbit, 2820 int *min_rate, int *min_rate_index, 2821 int shift, u32 rate_flags) 2822 { 2823 int i, j; 2824 2825 for (i = 0; i < supp_rates_len; i++) { 2826 int rate = supp_rates[i] & 0x7f; 2827 bool is_basic = !!(supp_rates[i] & 0x80); 2828 2829 if ((rate * 5 * (1 << shift)) > 110) 2830 *have_higher_than_11mbit = true; 2831 2832 /* 2833 * Skip HT and VHT BSS membership selectors since they're not 2834 * rates. 2835 * 2836 * Note: Even though the membership selector and the basic 2837 * rate flag share the same bit, they are not exactly 2838 * the same. 2839 */ 2840 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 2841 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 2842 continue; 2843 2844 for (j = 0; j < sband->n_bitrates; j++) { 2845 struct ieee80211_rate *br; 2846 int brate; 2847 2848 br = &sband->bitrates[j]; 2849 if ((rate_flags & br->flags) != rate_flags) 2850 continue; 2851 2852 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2853 if (brate == rate) { 2854 *rates |= BIT(j); 2855 if (is_basic) 2856 *basic_rates |= BIT(j); 2857 if ((rate * 5) < *min_rate) { 2858 *min_rate = rate * 5; 2859 *min_rate_index = j; 2860 } 2861 break; 2862 } 2863 } 2864 } 2865 } 2866 2867 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2868 struct cfg80211_bss *cbss, 2869 struct ieee80211_mgmt *mgmt, size_t len) 2870 { 2871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2872 struct ieee80211_local *local = sdata->local; 2873 struct ieee80211_supported_band *sband; 2874 struct sta_info *sta; 2875 u8 *pos; 2876 u16 capab_info, aid; 2877 struct ieee802_11_elems elems; 2878 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2879 const struct cfg80211_bss_ies *bss_ies = NULL; 2880 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2881 u32 changed = 0; 2882 int err; 2883 bool ret; 2884 2885 /* AssocResp and ReassocResp have identical structure */ 2886 2887 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2888 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2889 2890 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2891 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2892 aid); 2893 aid &= ~(BIT(15) | BIT(14)); 2894 2895 ifmgd->broken_ap = false; 2896 2897 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2898 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2899 aid); 2900 aid = 0; 2901 ifmgd->broken_ap = true; 2902 } 2903 2904 pos = mgmt->u.assoc_resp.variable; 2905 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2906 2907 if (!elems.supp_rates) { 2908 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2909 return false; 2910 } 2911 2912 ifmgd->aid = aid; 2913 ifmgd->tdls_chan_switch_prohibited = 2914 elems.ext_capab && elems.ext_capab_len >= 5 && 2915 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2916 2917 /* 2918 * Some APs are erroneously not including some information in their 2919 * (re)association response frames. Try to recover by using the data 2920 * from the beacon or probe response. This seems to afflict mobile 2921 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2922 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2923 */ 2924 if ((assoc_data->wmm && !elems.wmm_param) || 2925 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2926 (!elems.ht_cap_elem || !elems.ht_operation)) || 2927 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2928 (!elems.vht_cap_elem || !elems.vht_operation))) { 2929 const struct cfg80211_bss_ies *ies; 2930 struct ieee802_11_elems bss_elems; 2931 2932 rcu_read_lock(); 2933 ies = rcu_dereference(cbss->ies); 2934 if (ies) 2935 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2936 GFP_ATOMIC); 2937 rcu_read_unlock(); 2938 if (!bss_ies) 2939 return false; 2940 2941 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2942 false, &bss_elems); 2943 if (assoc_data->wmm && 2944 !elems.wmm_param && bss_elems.wmm_param) { 2945 elems.wmm_param = bss_elems.wmm_param; 2946 sdata_info(sdata, 2947 "AP bug: WMM param missing from AssocResp\n"); 2948 } 2949 2950 /* 2951 * Also check if we requested HT/VHT, otherwise the AP doesn't 2952 * have to include the IEs in the (re)association response. 2953 */ 2954 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2955 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2956 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2957 sdata_info(sdata, 2958 "AP bug: HT capability missing from AssocResp\n"); 2959 } 2960 if (!elems.ht_operation && bss_elems.ht_operation && 2961 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2962 elems.ht_operation = bss_elems.ht_operation; 2963 sdata_info(sdata, 2964 "AP bug: HT operation missing from AssocResp\n"); 2965 } 2966 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2967 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2968 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2969 sdata_info(sdata, 2970 "AP bug: VHT capa missing from AssocResp\n"); 2971 } 2972 if (!elems.vht_operation && bss_elems.vht_operation && 2973 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2974 elems.vht_operation = bss_elems.vht_operation; 2975 sdata_info(sdata, 2976 "AP bug: VHT operation missing from AssocResp\n"); 2977 } 2978 } 2979 2980 /* 2981 * We previously checked these in the beacon/probe response, so 2982 * they should be present here. This is just a safety net. 2983 */ 2984 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2985 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2986 sdata_info(sdata, 2987 "HT AP is missing WMM params or HT capability/operation\n"); 2988 ret = false; 2989 goto out; 2990 } 2991 2992 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2993 (!elems.vht_cap_elem || !elems.vht_operation)) { 2994 sdata_info(sdata, 2995 "VHT AP is missing VHT capability/operation\n"); 2996 ret = false; 2997 goto out; 2998 } 2999 3000 mutex_lock(&sdata->local->sta_mtx); 3001 /* 3002 * station info was already allocated and inserted before 3003 * the association and should be available to us 3004 */ 3005 sta = sta_info_get(sdata, cbss->bssid); 3006 if (WARN_ON(!sta)) { 3007 mutex_unlock(&sdata->local->sta_mtx); 3008 ret = false; 3009 goto out; 3010 } 3011 3012 sband = ieee80211_get_sband(sdata); 3013 if (!sband) { 3014 mutex_unlock(&sdata->local->sta_mtx); 3015 ret = false; 3016 goto out; 3017 } 3018 3019 /* Set up internal HT/VHT capabilities */ 3020 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3021 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3022 elems.ht_cap_elem, sta); 3023 3024 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3025 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3026 elems.vht_cap_elem, sta); 3027 3028 /* 3029 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3030 * in their association response, so ignore that data for our own 3031 * configuration. If it changed since the last beacon, we'll get the 3032 * next beacon and update then. 3033 */ 3034 3035 /* 3036 * If an operating mode notification IE is present, override the 3037 * NSS calculation (that would be done in rate_control_rate_init()) 3038 * and use the # of streams from that element. 3039 */ 3040 if (elems.opmode_notif && 3041 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3042 u8 nss; 3043 3044 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3045 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3046 nss += 1; 3047 sta->sta.rx_nss = nss; 3048 } 3049 3050 rate_control_rate_init(sta); 3051 3052 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3053 set_sta_flag(sta, WLAN_STA_MFP); 3054 sta->sta.mfp = true; 3055 } else { 3056 sta->sta.mfp = false; 3057 } 3058 3059 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3060 3061 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3062 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3063 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3064 if (err) { 3065 sdata_info(sdata, 3066 "failed to move station %pM to desired state\n", 3067 sta->sta.addr); 3068 WARN_ON(__sta_info_destroy(sta)); 3069 mutex_unlock(&sdata->local->sta_mtx); 3070 ret = false; 3071 goto out; 3072 } 3073 3074 mutex_unlock(&sdata->local->sta_mtx); 3075 3076 /* 3077 * Always handle WMM once after association regardless 3078 * of the first value the AP uses. Setting -1 here has 3079 * that effect because the AP values is an unsigned 3080 * 4-bit value. 3081 */ 3082 ifmgd->wmm_last_param_set = -1; 3083 3084 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3085 ieee80211_set_wmm_default(sdata, false, false); 3086 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3087 elems.wmm_param_len)) { 3088 /* still enable QoS since we might have HT/VHT */ 3089 ieee80211_set_wmm_default(sdata, false, true); 3090 /* set the disable-WMM flag in this case to disable 3091 * tracking WMM parameter changes in the beacon if 3092 * the parameters weren't actually valid. Doing so 3093 * avoids changing parameters very strangely when 3094 * the AP is going back and forth between valid and 3095 * invalid parameters. 3096 */ 3097 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3098 } 3099 changed |= BSS_CHANGED_QOS; 3100 3101 if (elems.max_idle_period_ie) { 3102 bss_conf->max_idle_period = 3103 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3104 bss_conf->protected_keep_alive = 3105 !!(elems.max_idle_period_ie->idle_options & 3106 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3107 changed |= BSS_CHANGED_KEEP_ALIVE; 3108 } else { 3109 bss_conf->max_idle_period = 0; 3110 bss_conf->protected_keep_alive = false; 3111 } 3112 3113 /* set AID and assoc capability, 3114 * ieee80211_set_associated() will tell the driver */ 3115 bss_conf->aid = aid; 3116 bss_conf->assoc_capability = capab_info; 3117 ieee80211_set_associated(sdata, cbss, changed); 3118 3119 /* 3120 * If we're using 4-addr mode, let the AP know that we're 3121 * doing so, so that it can create the STA VLAN on its side 3122 */ 3123 if (ifmgd->use_4addr) 3124 ieee80211_send_4addr_nullfunc(local, sdata); 3125 3126 /* 3127 * Start timer to probe the connection to the AP now. 3128 * Also start the timer that will detect beacon loss. 3129 */ 3130 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3131 ieee80211_sta_reset_beacon_monitor(sdata); 3132 3133 ret = true; 3134 out: 3135 kfree(bss_ies); 3136 return ret; 3137 } 3138 3139 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3140 struct ieee80211_mgmt *mgmt, 3141 size_t len) 3142 { 3143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3144 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3145 u16 capab_info, status_code, aid; 3146 struct ieee802_11_elems elems; 3147 int ac, uapsd_queues = -1; 3148 u8 *pos; 3149 bool reassoc; 3150 struct cfg80211_bss *bss; 3151 struct ieee80211_event event = { 3152 .type = MLME_EVENT, 3153 .u.mlme.data = ASSOC_EVENT, 3154 }; 3155 3156 sdata_assert_lock(sdata); 3157 3158 if (!assoc_data) 3159 return; 3160 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3161 return; 3162 3163 /* 3164 * AssocResp and ReassocResp have identical structure, so process both 3165 * of them in this function. 3166 */ 3167 3168 if (len < 24 + 6) 3169 return; 3170 3171 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 3172 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3173 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3174 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3175 3176 sdata_info(sdata, 3177 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3178 reassoc ? "Rea" : "A", mgmt->sa, 3179 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3180 3181 if (assoc_data->fils_kek_len && 3182 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3183 return; 3184 3185 pos = mgmt->u.assoc_resp.variable; 3186 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3187 3188 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3189 elems.timeout_int && 3190 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3191 u32 tu, ms; 3192 tu = le32_to_cpu(elems.timeout_int->value); 3193 ms = tu * 1024 / 1000; 3194 sdata_info(sdata, 3195 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3196 mgmt->sa, tu, ms); 3197 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3198 assoc_data->timeout_started = true; 3199 if (ms > IEEE80211_ASSOC_TIMEOUT) 3200 run_again(sdata, assoc_data->timeout); 3201 return; 3202 } 3203 3204 bss = assoc_data->bss; 3205 3206 if (status_code != WLAN_STATUS_SUCCESS) { 3207 sdata_info(sdata, "%pM denied association (code=%d)\n", 3208 mgmt->sa, status_code); 3209 ieee80211_destroy_assoc_data(sdata, false, false); 3210 event.u.mlme.status = MLME_DENIED; 3211 event.u.mlme.reason = status_code; 3212 drv_event_callback(sdata->local, sdata, &event); 3213 } else { 3214 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3215 /* oops -- internal error -- send timeout for now */ 3216 ieee80211_destroy_assoc_data(sdata, false, false); 3217 cfg80211_assoc_timeout(sdata->dev, bss); 3218 return; 3219 } 3220 event.u.mlme.status = MLME_SUCCESS; 3221 drv_event_callback(sdata->local, sdata, &event); 3222 sdata_info(sdata, "associated\n"); 3223 3224 /* 3225 * destroy assoc_data afterwards, as otherwise an idle 3226 * recalc after assoc_data is NULL but before associated 3227 * is set can cause the interface to go idle 3228 */ 3229 ieee80211_destroy_assoc_data(sdata, true, false); 3230 3231 /* get uapsd queues configuration */ 3232 uapsd_queues = 0; 3233 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3234 if (sdata->tx_conf[ac].uapsd) 3235 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3236 } 3237 3238 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3239 } 3240 3241 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3242 struct ieee80211_mgmt *mgmt, size_t len, 3243 struct ieee80211_rx_status *rx_status, 3244 struct ieee802_11_elems *elems) 3245 { 3246 struct ieee80211_local *local = sdata->local; 3247 struct ieee80211_bss *bss; 3248 struct ieee80211_channel *channel; 3249 3250 sdata_assert_lock(sdata); 3251 3252 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3253 if (!channel) 3254 return; 3255 3256 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3257 channel); 3258 if (bss) { 3259 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3260 ieee80211_rx_bss_put(local, bss); 3261 } 3262 } 3263 3264 3265 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3266 struct sk_buff *skb) 3267 { 3268 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3269 struct ieee80211_if_managed *ifmgd; 3270 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3271 size_t baselen, len = skb->len; 3272 struct ieee802_11_elems elems; 3273 3274 ifmgd = &sdata->u.mgd; 3275 3276 sdata_assert_lock(sdata); 3277 3278 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3279 return; /* ignore ProbeResp to foreign address */ 3280 3281 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3282 if (baselen > len) 3283 return; 3284 3285 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3286 false, &elems); 3287 3288 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3289 3290 if (ifmgd->associated && 3291 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3292 ieee80211_reset_ap_probe(sdata); 3293 } 3294 3295 /* 3296 * This is the canonical list of information elements we care about, 3297 * the filter code also gives us all changes to the Microsoft OUI 3298 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3299 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3300 * changes to requested client power. 3301 * 3302 * We implement beacon filtering in software since that means we can 3303 * avoid processing the frame here and in cfg80211, and userspace 3304 * will not be able to tell whether the hardware supports it or not. 3305 * 3306 * XXX: This list needs to be dynamic -- userspace needs to be able to 3307 * add items it requires. It also needs to be able to tell us to 3308 * look out for other vendor IEs. 3309 */ 3310 static const u64 care_about_ies = 3311 (1ULL << WLAN_EID_COUNTRY) | 3312 (1ULL << WLAN_EID_ERP_INFO) | 3313 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3314 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3315 (1ULL << WLAN_EID_HT_CAPABILITY) | 3316 (1ULL << WLAN_EID_HT_OPERATION) | 3317 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3318 3319 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3320 struct ieee80211_mgmt *mgmt, size_t len, 3321 struct ieee80211_rx_status *rx_status) 3322 { 3323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3324 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3325 size_t baselen; 3326 struct ieee802_11_elems elems; 3327 struct ieee80211_local *local = sdata->local; 3328 struct ieee80211_chanctx_conf *chanctx_conf; 3329 struct ieee80211_channel *chan; 3330 struct sta_info *sta; 3331 u32 changed = 0; 3332 bool erp_valid; 3333 u8 erp_value = 0; 3334 u32 ncrc; 3335 u8 *bssid; 3336 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3337 3338 sdata_assert_lock(sdata); 3339 3340 /* Process beacon from the current BSS */ 3341 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3342 if (baselen > len) 3343 return; 3344 3345 rcu_read_lock(); 3346 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3347 if (!chanctx_conf) { 3348 rcu_read_unlock(); 3349 return; 3350 } 3351 3352 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3353 rcu_read_unlock(); 3354 return; 3355 } 3356 chan = chanctx_conf->def.chan; 3357 rcu_read_unlock(); 3358 3359 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3360 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3361 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3362 len - baselen, false, &elems); 3363 3364 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3365 if (elems.tim && !elems.parse_error) { 3366 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3367 ifmgd->dtim_period = tim_ie->dtim_period; 3368 } 3369 ifmgd->have_beacon = true; 3370 ifmgd->assoc_data->need_beacon = false; 3371 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3372 sdata->vif.bss_conf.sync_tsf = 3373 le64_to_cpu(mgmt->u.beacon.timestamp); 3374 sdata->vif.bss_conf.sync_device_ts = 3375 rx_status->device_timestamp; 3376 if (elems.tim) 3377 sdata->vif.bss_conf.sync_dtim_count = 3378 elems.tim->dtim_count; 3379 else 3380 sdata->vif.bss_conf.sync_dtim_count = 0; 3381 } 3382 /* continue assoc process */ 3383 ifmgd->assoc_data->timeout = jiffies; 3384 ifmgd->assoc_data->timeout_started = true; 3385 run_again(sdata, ifmgd->assoc_data->timeout); 3386 return; 3387 } 3388 3389 if (!ifmgd->associated || 3390 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3391 return; 3392 bssid = ifmgd->associated->bssid; 3393 3394 /* Track average RSSI from the Beacon frames of the current AP */ 3395 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3396 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3397 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3398 ifmgd->last_cqm_event_signal = 0; 3399 ifmgd->count_beacon_signal = 1; 3400 ifmgd->last_ave_beacon_signal = 0; 3401 } else { 3402 ifmgd->count_beacon_signal++; 3403 } 3404 3405 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3406 3407 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3408 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3409 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3410 int last_sig = ifmgd->last_ave_beacon_signal; 3411 struct ieee80211_event event = { 3412 .type = RSSI_EVENT, 3413 }; 3414 3415 /* 3416 * if signal crosses either of the boundaries, invoke callback 3417 * with appropriate parameters 3418 */ 3419 if (sig > ifmgd->rssi_max_thold && 3420 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3421 ifmgd->last_ave_beacon_signal = sig; 3422 event.u.rssi.data = RSSI_EVENT_HIGH; 3423 drv_event_callback(local, sdata, &event); 3424 } else if (sig < ifmgd->rssi_min_thold && 3425 (last_sig >= ifmgd->rssi_max_thold || 3426 last_sig == 0)) { 3427 ifmgd->last_ave_beacon_signal = sig; 3428 event.u.rssi.data = RSSI_EVENT_LOW; 3429 drv_event_callback(local, sdata, &event); 3430 } 3431 } 3432 3433 if (bss_conf->cqm_rssi_thold && 3434 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3435 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3436 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3437 int last_event = ifmgd->last_cqm_event_signal; 3438 int thold = bss_conf->cqm_rssi_thold; 3439 int hyst = bss_conf->cqm_rssi_hyst; 3440 3441 if (sig < thold && 3442 (last_event == 0 || sig < last_event - hyst)) { 3443 ifmgd->last_cqm_event_signal = sig; 3444 ieee80211_cqm_rssi_notify( 3445 &sdata->vif, 3446 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3447 sig, GFP_KERNEL); 3448 } else if (sig > thold && 3449 (last_event == 0 || sig > last_event + hyst)) { 3450 ifmgd->last_cqm_event_signal = sig; 3451 ieee80211_cqm_rssi_notify( 3452 &sdata->vif, 3453 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3454 sig, GFP_KERNEL); 3455 } 3456 } 3457 3458 if (bss_conf->cqm_rssi_low && 3459 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3460 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3461 int last_event = ifmgd->last_cqm_event_signal; 3462 int low = bss_conf->cqm_rssi_low; 3463 int high = bss_conf->cqm_rssi_high; 3464 3465 if (sig < low && 3466 (last_event == 0 || last_event >= low)) { 3467 ifmgd->last_cqm_event_signal = sig; 3468 ieee80211_cqm_rssi_notify( 3469 &sdata->vif, 3470 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3471 sig, GFP_KERNEL); 3472 } else if (sig > high && 3473 (last_event == 0 || last_event <= high)) { 3474 ifmgd->last_cqm_event_signal = sig; 3475 ieee80211_cqm_rssi_notify( 3476 &sdata->vif, 3477 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3478 sig, GFP_KERNEL); 3479 } 3480 } 3481 3482 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3483 mlme_dbg_ratelimited(sdata, 3484 "cancelling AP probe due to a received beacon\n"); 3485 ieee80211_reset_ap_probe(sdata); 3486 } 3487 3488 /* 3489 * Push the beacon loss detection into the future since 3490 * we are processing a beacon from the AP just now. 3491 */ 3492 ieee80211_sta_reset_beacon_monitor(sdata); 3493 3494 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3495 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3496 len - baselen, false, &elems, 3497 care_about_ies, ncrc); 3498 3499 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3500 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3501 if (local->hw.conf.dynamic_ps_timeout > 0) { 3502 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3503 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3504 ieee80211_hw_config(local, 3505 IEEE80211_CONF_CHANGE_PS); 3506 } 3507 ieee80211_send_nullfunc(local, sdata, false); 3508 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3509 local->pspolling = true; 3510 3511 /* 3512 * Here is assumed that the driver will be 3513 * able to send ps-poll frame and receive a 3514 * response even though power save mode is 3515 * enabled, but some drivers might require 3516 * to disable power save here. This needs 3517 * to be investigated. 3518 */ 3519 ieee80211_send_pspoll(local, sdata); 3520 } 3521 } 3522 3523 if (sdata->vif.p2p || 3524 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3525 struct ieee80211_p2p_noa_attr noa = {}; 3526 int ret; 3527 3528 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3529 len - baselen, 3530 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3531 (u8 *) &noa, sizeof(noa)); 3532 if (ret >= 2) { 3533 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3534 /* valid noa_attr and index changed */ 3535 sdata->u.mgd.p2p_noa_index = noa.index; 3536 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3537 changed |= BSS_CHANGED_P2P_PS; 3538 /* 3539 * make sure we update all information, the CRC 3540 * mechanism doesn't look at P2P attributes. 3541 */ 3542 ifmgd->beacon_crc_valid = false; 3543 } 3544 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3545 /* noa_attr not found and we had valid noa_attr before */ 3546 sdata->u.mgd.p2p_noa_index = -1; 3547 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3548 changed |= BSS_CHANGED_P2P_PS; 3549 ifmgd->beacon_crc_valid = false; 3550 } 3551 } 3552 3553 if (ifmgd->csa_waiting_bcn) 3554 ieee80211_chswitch_post_beacon(sdata); 3555 3556 /* 3557 * Update beacon timing and dtim count on every beacon appearance. This 3558 * will allow the driver to use the most updated values. Do it before 3559 * comparing this one with last received beacon. 3560 * IMPORTANT: These parameters would possibly be out of sync by the time 3561 * the driver will use them. The synchronized view is currently 3562 * guaranteed only in certain callbacks. 3563 */ 3564 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3565 sdata->vif.bss_conf.sync_tsf = 3566 le64_to_cpu(mgmt->u.beacon.timestamp); 3567 sdata->vif.bss_conf.sync_device_ts = 3568 rx_status->device_timestamp; 3569 if (elems.tim) 3570 sdata->vif.bss_conf.sync_dtim_count = 3571 elems.tim->dtim_count; 3572 else 3573 sdata->vif.bss_conf.sync_dtim_count = 0; 3574 } 3575 3576 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3577 return; 3578 ifmgd->beacon_crc = ncrc; 3579 ifmgd->beacon_crc_valid = true; 3580 3581 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3582 3583 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3584 rx_status->device_timestamp, 3585 &elems, true); 3586 3587 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3588 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3589 elems.wmm_param_len)) 3590 changed |= BSS_CHANGED_QOS; 3591 3592 /* 3593 * If we haven't had a beacon before, tell the driver about the 3594 * DTIM period (and beacon timing if desired) now. 3595 */ 3596 if (!ifmgd->have_beacon) { 3597 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3598 if (elems.tim) 3599 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3600 else 3601 bss_conf->dtim_period = 1; 3602 3603 changed |= BSS_CHANGED_BEACON_INFO; 3604 ifmgd->have_beacon = true; 3605 3606 mutex_lock(&local->iflist_mtx); 3607 ieee80211_recalc_ps(local); 3608 mutex_unlock(&local->iflist_mtx); 3609 3610 ieee80211_recalc_ps_vif(sdata); 3611 } 3612 3613 if (elems.erp_info) { 3614 erp_valid = true; 3615 erp_value = elems.erp_info[0]; 3616 } else { 3617 erp_valid = false; 3618 } 3619 changed |= ieee80211_handle_bss_capability(sdata, 3620 le16_to_cpu(mgmt->u.beacon.capab_info), 3621 erp_valid, erp_value); 3622 3623 mutex_lock(&local->sta_mtx); 3624 sta = sta_info_get(sdata, bssid); 3625 3626 if (ieee80211_config_bw(sdata, sta, 3627 elems.ht_cap_elem, elems.ht_operation, 3628 elems.vht_operation, bssid, &changed)) { 3629 mutex_unlock(&local->sta_mtx); 3630 sdata_info(sdata, 3631 "failed to follow AP %pM bandwidth change, disconnect\n", 3632 bssid); 3633 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3634 WLAN_REASON_DEAUTH_LEAVING, 3635 true, deauth_buf); 3636 ieee80211_report_disconnect(sdata, deauth_buf, 3637 sizeof(deauth_buf), true, 3638 WLAN_REASON_DEAUTH_LEAVING); 3639 return; 3640 } 3641 3642 if (sta && elems.opmode_notif) 3643 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3644 rx_status->band); 3645 mutex_unlock(&local->sta_mtx); 3646 3647 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3648 elems.country_elem, 3649 elems.country_elem_len, 3650 elems.pwr_constr_elem, 3651 elems.cisco_dtpc_elem); 3652 3653 ieee80211_bss_info_change_notify(sdata, changed); 3654 } 3655 3656 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3657 struct sk_buff *skb) 3658 { 3659 struct ieee80211_rx_status *rx_status; 3660 struct ieee80211_mgmt *mgmt; 3661 u16 fc; 3662 struct ieee802_11_elems elems; 3663 int ies_len; 3664 3665 rx_status = (struct ieee80211_rx_status *) skb->cb; 3666 mgmt = (struct ieee80211_mgmt *) skb->data; 3667 fc = le16_to_cpu(mgmt->frame_control); 3668 3669 sdata_lock(sdata); 3670 3671 switch (fc & IEEE80211_FCTL_STYPE) { 3672 case IEEE80211_STYPE_BEACON: 3673 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3674 break; 3675 case IEEE80211_STYPE_PROBE_RESP: 3676 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3677 break; 3678 case IEEE80211_STYPE_AUTH: 3679 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3680 break; 3681 case IEEE80211_STYPE_DEAUTH: 3682 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3683 break; 3684 case IEEE80211_STYPE_DISASSOC: 3685 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3686 break; 3687 case IEEE80211_STYPE_ASSOC_RESP: 3688 case IEEE80211_STYPE_REASSOC_RESP: 3689 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3690 break; 3691 case IEEE80211_STYPE_ACTION: 3692 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3693 ies_len = skb->len - 3694 offsetof(struct ieee80211_mgmt, 3695 u.action.u.chan_switch.variable); 3696 3697 if (ies_len < 0) 3698 break; 3699 3700 ieee802_11_parse_elems( 3701 mgmt->u.action.u.chan_switch.variable, 3702 ies_len, true, &elems); 3703 3704 if (elems.parse_error) 3705 break; 3706 3707 ieee80211_sta_process_chanswitch(sdata, 3708 rx_status->mactime, 3709 rx_status->device_timestamp, 3710 &elems, false); 3711 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3712 ies_len = skb->len - 3713 offsetof(struct ieee80211_mgmt, 3714 u.action.u.ext_chan_switch.variable); 3715 3716 if (ies_len < 0) 3717 break; 3718 3719 ieee802_11_parse_elems( 3720 mgmt->u.action.u.ext_chan_switch.variable, 3721 ies_len, true, &elems); 3722 3723 if (elems.parse_error) 3724 break; 3725 3726 /* for the handling code pretend this was also an IE */ 3727 elems.ext_chansw_ie = 3728 &mgmt->u.action.u.ext_chan_switch.data; 3729 3730 ieee80211_sta_process_chanswitch(sdata, 3731 rx_status->mactime, 3732 rx_status->device_timestamp, 3733 &elems, false); 3734 } 3735 break; 3736 } 3737 sdata_unlock(sdata); 3738 } 3739 3740 static void ieee80211_sta_timer(unsigned long data) 3741 { 3742 struct ieee80211_sub_if_data *sdata = 3743 (struct ieee80211_sub_if_data *) data; 3744 3745 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3746 } 3747 3748 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3749 u8 *bssid, u8 reason, bool tx) 3750 { 3751 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3752 3753 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3754 tx, frame_buf); 3755 3756 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3757 reason); 3758 } 3759 3760 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3761 { 3762 struct ieee80211_local *local = sdata->local; 3763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3764 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3765 u32 tx_flags = 0; 3766 u16 trans = 1; 3767 u16 status = 0; 3768 3769 sdata_assert_lock(sdata); 3770 3771 if (WARN_ON_ONCE(!auth_data)) 3772 return -EINVAL; 3773 3774 auth_data->tries++; 3775 3776 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3777 sdata_info(sdata, "authentication with %pM timed out\n", 3778 auth_data->bss->bssid); 3779 3780 /* 3781 * Most likely AP is not in the range so remove the 3782 * bss struct for that AP. 3783 */ 3784 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3785 3786 return -ETIMEDOUT; 3787 } 3788 3789 drv_mgd_prepare_tx(local, sdata); 3790 3791 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3792 auth_data->bss->bssid, auth_data->tries, 3793 IEEE80211_AUTH_MAX_TRIES); 3794 3795 auth_data->expected_transaction = 2; 3796 3797 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3798 trans = auth_data->sae_trans; 3799 status = auth_data->sae_status; 3800 auth_data->expected_transaction = trans; 3801 } 3802 3803 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3804 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3805 IEEE80211_TX_INTFL_MLME_CONN_TX; 3806 3807 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3808 auth_data->data, auth_data->data_len, 3809 auth_data->bss->bssid, 3810 auth_data->bss->bssid, NULL, 0, 0, 3811 tx_flags); 3812 3813 if (tx_flags == 0) { 3814 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3815 auth_data->timeout_started = true; 3816 run_again(sdata, auth_data->timeout); 3817 } else { 3818 auth_data->timeout = 3819 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3820 auth_data->timeout_started = true; 3821 run_again(sdata, auth_data->timeout); 3822 } 3823 3824 return 0; 3825 } 3826 3827 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3828 { 3829 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3830 struct ieee80211_local *local = sdata->local; 3831 3832 sdata_assert_lock(sdata); 3833 3834 assoc_data->tries++; 3835 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3836 sdata_info(sdata, "association with %pM timed out\n", 3837 assoc_data->bss->bssid); 3838 3839 /* 3840 * Most likely AP is not in the range so remove the 3841 * bss struct for that AP. 3842 */ 3843 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3844 3845 return -ETIMEDOUT; 3846 } 3847 3848 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3849 assoc_data->bss->bssid, assoc_data->tries, 3850 IEEE80211_ASSOC_MAX_TRIES); 3851 ieee80211_send_assoc(sdata); 3852 3853 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3854 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3855 assoc_data->timeout_started = true; 3856 run_again(sdata, assoc_data->timeout); 3857 } else { 3858 assoc_data->timeout = 3859 round_jiffies_up(jiffies + 3860 IEEE80211_ASSOC_TIMEOUT_LONG); 3861 assoc_data->timeout_started = true; 3862 run_again(sdata, assoc_data->timeout); 3863 } 3864 3865 return 0; 3866 } 3867 3868 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3869 __le16 fc, bool acked) 3870 { 3871 struct ieee80211_local *local = sdata->local; 3872 3873 sdata->u.mgd.status_fc = fc; 3874 sdata->u.mgd.status_acked = acked; 3875 sdata->u.mgd.status_received = true; 3876 3877 ieee80211_queue_work(&local->hw, &sdata->work); 3878 } 3879 3880 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3881 { 3882 struct ieee80211_local *local = sdata->local; 3883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3884 3885 sdata_lock(sdata); 3886 3887 if (ifmgd->status_received) { 3888 __le16 fc = ifmgd->status_fc; 3889 bool status_acked = ifmgd->status_acked; 3890 3891 ifmgd->status_received = false; 3892 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 3893 if (status_acked) { 3894 ifmgd->auth_data->timeout = 3895 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3896 run_again(sdata, ifmgd->auth_data->timeout); 3897 } else { 3898 ifmgd->auth_data->timeout = jiffies - 1; 3899 } 3900 ifmgd->auth_data->timeout_started = true; 3901 } else if (ifmgd->assoc_data && 3902 (ieee80211_is_assoc_req(fc) || 3903 ieee80211_is_reassoc_req(fc))) { 3904 if (status_acked) { 3905 ifmgd->assoc_data->timeout = 3906 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3907 run_again(sdata, ifmgd->assoc_data->timeout); 3908 } else { 3909 ifmgd->assoc_data->timeout = jiffies - 1; 3910 } 3911 ifmgd->assoc_data->timeout_started = true; 3912 } 3913 } 3914 3915 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3916 time_after(jiffies, ifmgd->auth_data->timeout)) { 3917 if (ifmgd->auth_data->done) { 3918 /* 3919 * ok ... we waited for assoc but userspace didn't, 3920 * so let's just kill the auth data 3921 */ 3922 ieee80211_destroy_auth_data(sdata, false); 3923 } else if (ieee80211_auth(sdata)) { 3924 u8 bssid[ETH_ALEN]; 3925 struct ieee80211_event event = { 3926 .type = MLME_EVENT, 3927 .u.mlme.data = AUTH_EVENT, 3928 .u.mlme.status = MLME_TIMEOUT, 3929 }; 3930 3931 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3932 3933 ieee80211_destroy_auth_data(sdata, false); 3934 3935 cfg80211_auth_timeout(sdata->dev, bssid); 3936 drv_event_callback(sdata->local, sdata, &event); 3937 } 3938 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3939 run_again(sdata, ifmgd->auth_data->timeout); 3940 3941 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3942 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3943 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3944 ieee80211_do_assoc(sdata)) { 3945 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3946 struct ieee80211_event event = { 3947 .type = MLME_EVENT, 3948 .u.mlme.data = ASSOC_EVENT, 3949 .u.mlme.status = MLME_TIMEOUT, 3950 }; 3951 3952 ieee80211_destroy_assoc_data(sdata, false, false); 3953 cfg80211_assoc_timeout(sdata->dev, bss); 3954 drv_event_callback(sdata->local, sdata, &event); 3955 } 3956 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3957 run_again(sdata, ifmgd->assoc_data->timeout); 3958 3959 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3960 ifmgd->associated) { 3961 u8 bssid[ETH_ALEN]; 3962 int max_tries; 3963 3964 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3965 3966 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3967 max_tries = max_nullfunc_tries; 3968 else 3969 max_tries = max_probe_tries; 3970 3971 /* ACK received for nullfunc probing frame */ 3972 if (!ifmgd->probe_send_count) 3973 ieee80211_reset_ap_probe(sdata); 3974 else if (ifmgd->nullfunc_failed) { 3975 if (ifmgd->probe_send_count < max_tries) { 3976 mlme_dbg(sdata, 3977 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3978 bssid, ifmgd->probe_send_count, 3979 max_tries); 3980 ieee80211_mgd_probe_ap_send(sdata); 3981 } else { 3982 mlme_dbg(sdata, 3983 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3984 bssid); 3985 ieee80211_sta_connection_lost(sdata, bssid, 3986 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3987 false); 3988 } 3989 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3990 run_again(sdata, ifmgd->probe_timeout); 3991 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3992 mlme_dbg(sdata, 3993 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3994 bssid, probe_wait_ms); 3995 ieee80211_sta_connection_lost(sdata, bssid, 3996 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3997 } else if (ifmgd->probe_send_count < max_tries) { 3998 mlme_dbg(sdata, 3999 "No probe response from AP %pM after %dms, try %d/%i\n", 4000 bssid, probe_wait_ms, 4001 ifmgd->probe_send_count, max_tries); 4002 ieee80211_mgd_probe_ap_send(sdata); 4003 } else { 4004 /* 4005 * We actually lost the connection ... or did we? 4006 * Let's make sure! 4007 */ 4008 mlme_dbg(sdata, 4009 "No probe response from AP %pM after %dms, disconnecting.\n", 4010 bssid, probe_wait_ms); 4011 4012 ieee80211_sta_connection_lost(sdata, bssid, 4013 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4014 } 4015 } 4016 4017 sdata_unlock(sdata); 4018 } 4019 4020 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 4021 { 4022 struct ieee80211_sub_if_data *sdata = 4023 (struct ieee80211_sub_if_data *) data; 4024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4025 4026 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4027 return; 4028 4029 sdata->u.mgd.connection_loss = false; 4030 ieee80211_queue_work(&sdata->local->hw, 4031 &sdata->u.mgd.beacon_connection_loss_work); 4032 } 4033 4034 static void ieee80211_sta_conn_mon_timer(unsigned long data) 4035 { 4036 struct ieee80211_sub_if_data *sdata = 4037 (struct ieee80211_sub_if_data *) data; 4038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4039 struct ieee80211_local *local = sdata->local; 4040 4041 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4042 return; 4043 4044 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4045 } 4046 4047 static void ieee80211_sta_monitor_work(struct work_struct *work) 4048 { 4049 struct ieee80211_sub_if_data *sdata = 4050 container_of(work, struct ieee80211_sub_if_data, 4051 u.mgd.monitor_work); 4052 4053 ieee80211_mgd_probe_ap(sdata, false); 4054 } 4055 4056 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4057 { 4058 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4059 __ieee80211_stop_poll(sdata); 4060 4061 /* let's probe the connection once */ 4062 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4063 ieee80211_queue_work(&sdata->local->hw, 4064 &sdata->u.mgd.monitor_work); 4065 } 4066 } 4067 4068 #ifdef CONFIG_PM 4069 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4070 { 4071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4072 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4073 4074 sdata_lock(sdata); 4075 4076 if (ifmgd->auth_data || ifmgd->assoc_data) { 4077 const u8 *bssid = ifmgd->auth_data ? 4078 ifmgd->auth_data->bss->bssid : 4079 ifmgd->assoc_data->bss->bssid; 4080 4081 /* 4082 * If we are trying to authenticate / associate while suspending, 4083 * cfg80211 won't know and won't actually abort those attempts, 4084 * thus we need to do that ourselves. 4085 */ 4086 ieee80211_send_deauth_disassoc(sdata, bssid, 4087 IEEE80211_STYPE_DEAUTH, 4088 WLAN_REASON_DEAUTH_LEAVING, 4089 false, frame_buf); 4090 if (ifmgd->assoc_data) 4091 ieee80211_destroy_assoc_data(sdata, false, true); 4092 if (ifmgd->auth_data) 4093 ieee80211_destroy_auth_data(sdata, false); 4094 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4095 IEEE80211_DEAUTH_FRAME_LEN); 4096 } 4097 4098 /* This is a bit of a hack - we should find a better and more generic 4099 * solution to this. Normally when suspending, cfg80211 will in fact 4100 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4101 * auth (not so important) or assoc (this is the problem) process. 4102 * 4103 * As a consequence, it can happen that we are in the process of both 4104 * associating and suspending, and receive an association response 4105 * after cfg80211 has checked if it needs to disconnect, but before 4106 * we actually set the flag to drop incoming frames. This will then 4107 * cause the workqueue flush to process the association response in 4108 * the suspend, resulting in a successful association just before it 4109 * tries to remove the interface from the driver, which now though 4110 * has a channel context assigned ... this results in issues. 4111 * 4112 * To work around this (for now) simply deauth here again if we're 4113 * now connected. 4114 */ 4115 if (ifmgd->associated && !sdata->local->wowlan) { 4116 u8 bssid[ETH_ALEN]; 4117 struct cfg80211_deauth_request req = { 4118 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4119 .bssid = bssid, 4120 }; 4121 4122 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4123 ieee80211_mgd_deauth(sdata, &req); 4124 } 4125 4126 sdata_unlock(sdata); 4127 } 4128 4129 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4130 { 4131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4132 4133 sdata_lock(sdata); 4134 if (!ifmgd->associated) { 4135 sdata_unlock(sdata); 4136 return; 4137 } 4138 4139 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4140 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4141 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4142 ieee80211_sta_connection_lost(sdata, 4143 ifmgd->associated->bssid, 4144 WLAN_REASON_UNSPECIFIED, 4145 true); 4146 sdata_unlock(sdata); 4147 return; 4148 } 4149 sdata_unlock(sdata); 4150 } 4151 #endif 4152 4153 /* interface setup */ 4154 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4155 { 4156 struct ieee80211_if_managed *ifmgd; 4157 4158 ifmgd = &sdata->u.mgd; 4159 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4160 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4161 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4162 ieee80211_beacon_connection_loss_work); 4163 INIT_WORK(&ifmgd->csa_connection_drop_work, 4164 ieee80211_csa_connection_drop_work); 4165 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4166 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4167 ieee80211_tdls_peer_del_work); 4168 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 4169 (unsigned long) sdata); 4170 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 4171 (unsigned long) sdata); 4172 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 4173 (unsigned long) sdata); 4174 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 4175 (unsigned long) sdata); 4176 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4177 ieee80211_sta_handle_tspec_ac_params_wk); 4178 4179 ifmgd->flags = 0; 4180 ifmgd->powersave = sdata->wdev.ps; 4181 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4182 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4183 ifmgd->p2p_noa_index = -1; 4184 4185 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4186 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4187 else 4188 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4189 4190 /* Setup TDLS data */ 4191 spin_lock_init(&ifmgd->teardown_lock); 4192 ifmgd->teardown_skb = NULL; 4193 ifmgd->orig_teardown_skb = NULL; 4194 } 4195 4196 /* scan finished notification */ 4197 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4198 { 4199 struct ieee80211_sub_if_data *sdata; 4200 4201 /* Restart STA timers */ 4202 rcu_read_lock(); 4203 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4204 if (ieee80211_sdata_running(sdata)) 4205 ieee80211_restart_sta_timer(sdata); 4206 } 4207 rcu_read_unlock(); 4208 } 4209 4210 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4211 struct cfg80211_bss *cbss) 4212 { 4213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4214 const u8 *ht_cap_ie, *vht_cap_ie; 4215 const struct ieee80211_ht_cap *ht_cap; 4216 const struct ieee80211_vht_cap *vht_cap; 4217 u8 chains = 1; 4218 4219 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4220 return chains; 4221 4222 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4223 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4224 ht_cap = (void *)(ht_cap_ie + 2); 4225 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4226 /* 4227 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4228 * "Tx Unequal Modulation Supported" fields. 4229 */ 4230 } 4231 4232 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4233 return chains; 4234 4235 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4236 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4237 u8 nss; 4238 u16 tx_mcs_map; 4239 4240 vht_cap = (void *)(vht_cap_ie + 2); 4241 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4242 for (nss = 8; nss > 0; nss--) { 4243 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4244 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4245 break; 4246 } 4247 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4248 chains = max(chains, nss); 4249 } 4250 4251 return chains; 4252 } 4253 4254 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4255 struct cfg80211_bss *cbss) 4256 { 4257 struct ieee80211_local *local = sdata->local; 4258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4259 const struct ieee80211_ht_cap *ht_cap = NULL; 4260 const struct ieee80211_ht_operation *ht_oper = NULL; 4261 const struct ieee80211_vht_operation *vht_oper = NULL; 4262 struct ieee80211_supported_band *sband; 4263 struct cfg80211_chan_def chandef; 4264 int ret; 4265 u32 i; 4266 bool have_80mhz; 4267 4268 sband = local->hw.wiphy->bands[cbss->channel->band]; 4269 4270 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4271 IEEE80211_STA_DISABLE_80P80MHZ | 4272 IEEE80211_STA_DISABLE_160MHZ); 4273 4274 rcu_read_lock(); 4275 4276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4277 sband->ht_cap.ht_supported) { 4278 const u8 *ht_oper_ie, *ht_cap_ie; 4279 4280 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4281 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4282 ht_oper = (void *)(ht_oper_ie + 2); 4283 4284 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4285 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4286 ht_cap = (void *)(ht_cap_ie + 2); 4287 4288 if (!ht_cap) { 4289 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4290 ht_oper = NULL; 4291 } 4292 } 4293 4294 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4295 sband->vht_cap.vht_supported) { 4296 const u8 *vht_oper_ie, *vht_cap; 4297 4298 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4299 WLAN_EID_VHT_OPERATION); 4300 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4301 vht_oper = (void *)(vht_oper_ie + 2); 4302 if (vht_oper && !ht_oper) { 4303 vht_oper = NULL; 4304 sdata_info(sdata, 4305 "AP advertised VHT without HT, disabling both\n"); 4306 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4307 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4308 } 4309 4310 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4311 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4312 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4313 vht_oper = NULL; 4314 } 4315 } 4316 4317 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4318 have_80mhz = false; 4319 for (i = 0; i < sband->n_channels; i++) { 4320 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4321 IEEE80211_CHAN_NO_80MHZ)) 4322 continue; 4323 4324 have_80mhz = true; 4325 break; 4326 } 4327 4328 if (!have_80mhz) 4329 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4330 4331 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4332 cbss->channel, 4333 ht_cap, ht_oper, vht_oper, 4334 &chandef, false); 4335 4336 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4337 local->rx_chains); 4338 4339 rcu_read_unlock(); 4340 4341 /* will change later if needed */ 4342 sdata->smps_mode = IEEE80211_SMPS_OFF; 4343 4344 mutex_lock(&local->mtx); 4345 /* 4346 * If this fails (possibly due to channel context sharing 4347 * on incompatible channels, e.g. 80+80 and 160 sharing the 4348 * same control channel) try to use a smaller bandwidth. 4349 */ 4350 ret = ieee80211_vif_use_channel(sdata, &chandef, 4351 IEEE80211_CHANCTX_SHARED); 4352 4353 /* don't downgrade for 5 and 10 MHz channels, though. */ 4354 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4355 chandef.width == NL80211_CHAN_WIDTH_10) 4356 goto out; 4357 4358 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4359 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4360 ret = ieee80211_vif_use_channel(sdata, &chandef, 4361 IEEE80211_CHANCTX_SHARED); 4362 } 4363 out: 4364 mutex_unlock(&local->mtx); 4365 return ret; 4366 } 4367 4368 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4369 struct cfg80211_bss *cbss, bool assoc, 4370 bool override) 4371 { 4372 struct ieee80211_local *local = sdata->local; 4373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4374 struct ieee80211_bss *bss = (void *)cbss->priv; 4375 struct sta_info *new_sta = NULL; 4376 struct ieee80211_supported_band *sband; 4377 bool have_sta = false; 4378 int err; 4379 4380 sband = local->hw.wiphy->bands[cbss->channel->band]; 4381 4382 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4383 return -EINVAL; 4384 4385 if (assoc) { 4386 rcu_read_lock(); 4387 have_sta = sta_info_get(sdata, cbss->bssid); 4388 rcu_read_unlock(); 4389 } 4390 4391 if (!have_sta) { 4392 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4393 if (!new_sta) 4394 return -ENOMEM; 4395 } 4396 4397 if (new_sta || override) { 4398 err = ieee80211_prep_channel(sdata, cbss); 4399 if (err) { 4400 if (new_sta) 4401 sta_info_free(local, new_sta); 4402 return -EINVAL; 4403 } 4404 } 4405 4406 if (new_sta) { 4407 u32 rates = 0, basic_rates = 0; 4408 bool have_higher_than_11mbit; 4409 int min_rate = INT_MAX, min_rate_index = -1; 4410 struct ieee80211_chanctx_conf *chanctx_conf; 4411 const struct cfg80211_bss_ies *ies; 4412 int shift = ieee80211_vif_get_shift(&sdata->vif); 4413 u32 rate_flags; 4414 4415 rcu_read_lock(); 4416 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4417 if (WARN_ON(!chanctx_conf)) { 4418 rcu_read_unlock(); 4419 sta_info_free(local, new_sta); 4420 return -EINVAL; 4421 } 4422 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 4423 rcu_read_unlock(); 4424 4425 ieee80211_get_rates(sband, bss->supp_rates, 4426 bss->supp_rates_len, 4427 &rates, &basic_rates, 4428 &have_higher_than_11mbit, 4429 &min_rate, &min_rate_index, 4430 shift, rate_flags); 4431 4432 /* 4433 * This used to be a workaround for basic rates missing 4434 * in the association response frame. Now that we no 4435 * longer use the basic rates from there, it probably 4436 * doesn't happen any more, but keep the workaround so 4437 * in case some *other* APs are buggy in different ways 4438 * we can connect -- with a warning. 4439 */ 4440 if (!basic_rates && min_rate_index >= 0) { 4441 sdata_info(sdata, 4442 "No basic rates, using min rate instead\n"); 4443 basic_rates = BIT(min_rate_index); 4444 } 4445 4446 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4447 sdata->vif.bss_conf.basic_rates = basic_rates; 4448 4449 /* cf. IEEE 802.11 9.2.12 */ 4450 if (cbss->channel->band == NL80211_BAND_2GHZ && 4451 have_higher_than_11mbit) 4452 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4453 else 4454 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4455 4456 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4457 4458 /* set timing information */ 4459 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4460 rcu_read_lock(); 4461 ies = rcu_dereference(cbss->beacon_ies); 4462 if (ies) { 4463 const u8 *tim_ie; 4464 4465 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4466 sdata->vif.bss_conf.sync_device_ts = 4467 bss->device_ts_beacon; 4468 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4469 ies->data, ies->len); 4470 if (tim_ie && tim_ie[1] >= 2) 4471 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4472 else 4473 sdata->vif.bss_conf.sync_dtim_count = 0; 4474 } else if (!ieee80211_hw_check(&sdata->local->hw, 4475 TIMING_BEACON_ONLY)) { 4476 ies = rcu_dereference(cbss->proberesp_ies); 4477 /* must be non-NULL since beacon IEs were NULL */ 4478 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4479 sdata->vif.bss_conf.sync_device_ts = 4480 bss->device_ts_presp; 4481 sdata->vif.bss_conf.sync_dtim_count = 0; 4482 } else { 4483 sdata->vif.bss_conf.sync_tsf = 0; 4484 sdata->vif.bss_conf.sync_device_ts = 0; 4485 sdata->vif.bss_conf.sync_dtim_count = 0; 4486 } 4487 rcu_read_unlock(); 4488 4489 /* tell driver about BSSID, basic rates and timing */ 4490 ieee80211_bss_info_change_notify(sdata, 4491 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4492 BSS_CHANGED_BEACON_INT); 4493 4494 if (assoc) 4495 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4496 4497 err = sta_info_insert(new_sta); 4498 new_sta = NULL; 4499 if (err) { 4500 sdata_info(sdata, 4501 "failed to insert STA entry for the AP (error %d)\n", 4502 err); 4503 return err; 4504 } 4505 } else 4506 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4507 4508 /* Cancel scan to ensure that nothing interferes with connection */ 4509 if (local->scanning) 4510 ieee80211_scan_cancel(local); 4511 4512 return 0; 4513 } 4514 4515 /* config hooks */ 4516 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4517 struct cfg80211_auth_request *req) 4518 { 4519 struct ieee80211_local *local = sdata->local; 4520 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4521 struct ieee80211_mgd_auth_data *auth_data; 4522 u16 auth_alg; 4523 int err; 4524 4525 /* prepare auth data structure */ 4526 4527 switch (req->auth_type) { 4528 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4529 auth_alg = WLAN_AUTH_OPEN; 4530 break; 4531 case NL80211_AUTHTYPE_SHARED_KEY: 4532 if (IS_ERR(local->wep_tx_tfm)) 4533 return -EOPNOTSUPP; 4534 auth_alg = WLAN_AUTH_SHARED_KEY; 4535 break; 4536 case NL80211_AUTHTYPE_FT: 4537 auth_alg = WLAN_AUTH_FT; 4538 break; 4539 case NL80211_AUTHTYPE_NETWORK_EAP: 4540 auth_alg = WLAN_AUTH_LEAP; 4541 break; 4542 case NL80211_AUTHTYPE_SAE: 4543 auth_alg = WLAN_AUTH_SAE; 4544 break; 4545 case NL80211_AUTHTYPE_FILS_SK: 4546 auth_alg = WLAN_AUTH_FILS_SK; 4547 break; 4548 case NL80211_AUTHTYPE_FILS_SK_PFS: 4549 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4550 break; 4551 case NL80211_AUTHTYPE_FILS_PK: 4552 auth_alg = WLAN_AUTH_FILS_PK; 4553 break; 4554 default: 4555 return -EOPNOTSUPP; 4556 } 4557 4558 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4559 req->ie_len, GFP_KERNEL); 4560 if (!auth_data) 4561 return -ENOMEM; 4562 4563 auth_data->bss = req->bss; 4564 4565 if (req->auth_data_len >= 4) { 4566 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4567 __le16 *pos = (__le16 *) req->auth_data; 4568 4569 auth_data->sae_trans = le16_to_cpu(pos[0]); 4570 auth_data->sae_status = le16_to_cpu(pos[1]); 4571 } 4572 memcpy(auth_data->data, req->auth_data + 4, 4573 req->auth_data_len - 4); 4574 auth_data->data_len += req->auth_data_len - 4; 4575 } 4576 4577 if (req->ie && req->ie_len) { 4578 memcpy(&auth_data->data[auth_data->data_len], 4579 req->ie, req->ie_len); 4580 auth_data->data_len += req->ie_len; 4581 } 4582 4583 if (req->key && req->key_len) { 4584 auth_data->key_len = req->key_len; 4585 auth_data->key_idx = req->key_idx; 4586 memcpy(auth_data->key, req->key, req->key_len); 4587 } 4588 4589 auth_data->algorithm = auth_alg; 4590 4591 /* try to authenticate/probe */ 4592 4593 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4594 ifmgd->assoc_data) { 4595 err = -EBUSY; 4596 goto err_free; 4597 } 4598 4599 if (ifmgd->auth_data) 4600 ieee80211_destroy_auth_data(sdata, false); 4601 4602 /* prep auth_data so we don't go into idle on disassoc */ 4603 ifmgd->auth_data = auth_data; 4604 4605 if (ifmgd->associated) { 4606 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4607 4608 sdata_info(sdata, 4609 "disconnect from AP %pM for new auth to %pM\n", 4610 ifmgd->associated->bssid, req->bss->bssid); 4611 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4612 WLAN_REASON_UNSPECIFIED, 4613 false, frame_buf); 4614 4615 ieee80211_report_disconnect(sdata, frame_buf, 4616 sizeof(frame_buf), true, 4617 WLAN_REASON_UNSPECIFIED); 4618 } 4619 4620 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4621 4622 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4623 if (err) 4624 goto err_clear; 4625 4626 err = ieee80211_auth(sdata); 4627 if (err) { 4628 sta_info_destroy_addr(sdata, req->bss->bssid); 4629 goto err_clear; 4630 } 4631 4632 /* hold our own reference */ 4633 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4634 return 0; 4635 4636 err_clear: 4637 eth_zero_addr(ifmgd->bssid); 4638 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4639 ifmgd->auth_data = NULL; 4640 mutex_lock(&sdata->local->mtx); 4641 ieee80211_vif_release_channel(sdata); 4642 mutex_unlock(&sdata->local->mtx); 4643 err_free: 4644 kfree(auth_data); 4645 return err; 4646 } 4647 4648 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4649 struct cfg80211_assoc_request *req) 4650 { 4651 struct ieee80211_local *local = sdata->local; 4652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4653 struct ieee80211_bss *bss = (void *)req->bss->priv; 4654 struct ieee80211_mgd_assoc_data *assoc_data; 4655 const struct cfg80211_bss_ies *beacon_ies; 4656 struct ieee80211_supported_band *sband; 4657 const u8 *ssidie, *ht_ie, *vht_ie; 4658 int i, err; 4659 bool override = false; 4660 4661 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4662 if (!assoc_data) 4663 return -ENOMEM; 4664 4665 rcu_read_lock(); 4666 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4667 if (!ssidie) { 4668 rcu_read_unlock(); 4669 kfree(assoc_data); 4670 return -EINVAL; 4671 } 4672 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4673 assoc_data->ssid_len = ssidie[1]; 4674 rcu_read_unlock(); 4675 4676 if (ifmgd->associated) { 4677 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4678 4679 sdata_info(sdata, 4680 "disconnect from AP %pM for new assoc to %pM\n", 4681 ifmgd->associated->bssid, req->bss->bssid); 4682 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4683 WLAN_REASON_UNSPECIFIED, 4684 false, frame_buf); 4685 4686 ieee80211_report_disconnect(sdata, frame_buf, 4687 sizeof(frame_buf), true, 4688 WLAN_REASON_UNSPECIFIED); 4689 } 4690 4691 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4692 err = -EBUSY; 4693 goto err_free; 4694 } 4695 4696 if (ifmgd->assoc_data) { 4697 err = -EBUSY; 4698 goto err_free; 4699 } 4700 4701 if (ifmgd->auth_data) { 4702 bool match; 4703 4704 /* keep sta info, bssid if matching */ 4705 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4706 ieee80211_destroy_auth_data(sdata, match); 4707 } 4708 4709 /* prepare assoc data */ 4710 4711 ifmgd->beacon_crc_valid = false; 4712 4713 assoc_data->wmm = bss->wmm_used && 4714 (local->hw.queues >= IEEE80211_NUM_ACS); 4715 4716 /* 4717 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4718 * We still associate in non-HT mode (11a/b/g) if any one of these 4719 * ciphers is configured as pairwise. 4720 * We can set this to true for non-11n hardware, that'll be checked 4721 * separately along with the peer capabilities. 4722 */ 4723 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4724 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4725 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4726 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4727 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4728 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4729 netdev_info(sdata->dev, 4730 "disabling HT/VHT due to WEP/TKIP use\n"); 4731 } 4732 } 4733 4734 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4735 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4736 if (!sband->ht_cap.ht_supported || 4737 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4738 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4739 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4740 if (!bss->wmm_used && 4741 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4742 netdev_info(sdata->dev, 4743 "disabling HT as WMM/QoS is not supported by the AP\n"); 4744 } 4745 4746 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4747 if (!sband->vht_cap.vht_supported || 4748 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4749 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4750 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4751 if (!bss->wmm_used && 4752 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4753 netdev_info(sdata->dev, 4754 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4755 } 4756 4757 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4758 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4759 sizeof(ifmgd->ht_capa_mask)); 4760 4761 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4762 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4763 sizeof(ifmgd->vht_capa_mask)); 4764 4765 if (req->ie && req->ie_len) { 4766 memcpy(assoc_data->ie, req->ie, req->ie_len); 4767 assoc_data->ie_len = req->ie_len; 4768 } 4769 4770 if (req->fils_kek) { 4771 /* should already be checked in cfg80211 - so warn */ 4772 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 4773 err = -EINVAL; 4774 goto err_free; 4775 } 4776 memcpy(assoc_data->fils_kek, req->fils_kek, 4777 req->fils_kek_len); 4778 assoc_data->fils_kek_len = req->fils_kek_len; 4779 } 4780 4781 if (req->fils_nonces) 4782 memcpy(assoc_data->fils_nonces, req->fils_nonces, 4783 2 * FILS_NONCE_LEN); 4784 4785 assoc_data->bss = req->bss; 4786 4787 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4788 if (ifmgd->powersave) 4789 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4790 else 4791 sdata->smps_mode = IEEE80211_SMPS_OFF; 4792 } else 4793 sdata->smps_mode = ifmgd->req_smps; 4794 4795 assoc_data->capability = req->bss->capability; 4796 assoc_data->supp_rates = bss->supp_rates; 4797 assoc_data->supp_rates_len = bss->supp_rates_len; 4798 4799 rcu_read_lock(); 4800 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4801 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4802 assoc_data->ap_ht_param = 4803 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4804 else 4805 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4806 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4807 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4808 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4809 sizeof(struct ieee80211_vht_cap)); 4810 else 4811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4812 rcu_read_unlock(); 4813 4814 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4815 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4816 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4817 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4818 4819 if (bss->wmm_used && bss->uapsd_supported && 4820 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4821 assoc_data->uapsd = true; 4822 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4823 } else { 4824 assoc_data->uapsd = false; 4825 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4826 } 4827 4828 if (req->prev_bssid) 4829 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4830 4831 if (req->use_mfp) { 4832 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4833 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4834 } else { 4835 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4836 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4837 } 4838 4839 if (req->flags & ASSOC_REQ_USE_RRM) 4840 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4841 else 4842 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4843 4844 if (req->crypto.control_port) 4845 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4846 else 4847 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4848 4849 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4850 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4851 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4852 sdata->vif.type); 4853 4854 /* kick off associate process */ 4855 4856 ifmgd->assoc_data = assoc_data; 4857 ifmgd->dtim_period = 0; 4858 ifmgd->have_beacon = false; 4859 4860 /* override HT/VHT configuration only if the AP and we support it */ 4861 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4862 struct ieee80211_sta_ht_cap sta_ht_cap; 4863 4864 if (req->flags & ASSOC_REQ_DISABLE_HT) 4865 override = true; 4866 4867 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4868 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4869 4870 /* check for 40 MHz disable override */ 4871 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4872 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4873 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4874 override = true; 4875 4876 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4877 req->flags & ASSOC_REQ_DISABLE_VHT) 4878 override = true; 4879 } 4880 4881 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4882 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4883 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4884 } 4885 4886 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4887 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4888 4889 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4890 if (err) 4891 goto err_clear; 4892 4893 rcu_read_lock(); 4894 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4895 4896 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4897 !beacon_ies) { 4898 /* 4899 * Wait up to one beacon interval ... 4900 * should this be more if we miss one? 4901 */ 4902 sdata_info(sdata, "waiting for beacon from %pM\n", 4903 ifmgd->bssid); 4904 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4905 assoc_data->timeout_started = true; 4906 assoc_data->need_beacon = true; 4907 } else if (beacon_ies) { 4908 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4909 beacon_ies->data, 4910 beacon_ies->len); 4911 u8 dtim_count = 0; 4912 4913 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4914 const struct ieee80211_tim_ie *tim; 4915 tim = (void *)(tim_ie + 2); 4916 ifmgd->dtim_period = tim->dtim_period; 4917 dtim_count = tim->dtim_count; 4918 } 4919 ifmgd->have_beacon = true; 4920 assoc_data->timeout = jiffies; 4921 assoc_data->timeout_started = true; 4922 4923 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4924 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4925 sdata->vif.bss_conf.sync_device_ts = 4926 bss->device_ts_beacon; 4927 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4928 } 4929 } else { 4930 assoc_data->timeout = jiffies; 4931 assoc_data->timeout_started = true; 4932 } 4933 rcu_read_unlock(); 4934 4935 run_again(sdata, assoc_data->timeout); 4936 4937 if (bss->corrupt_data) { 4938 char *corrupt_type = "data"; 4939 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4940 if (bss->corrupt_data & 4941 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4942 corrupt_type = "beacon and probe response"; 4943 else 4944 corrupt_type = "beacon"; 4945 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4946 corrupt_type = "probe response"; 4947 sdata_info(sdata, "associating with AP with corrupt %s\n", 4948 corrupt_type); 4949 } 4950 4951 return 0; 4952 err_clear: 4953 eth_zero_addr(ifmgd->bssid); 4954 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4955 ifmgd->assoc_data = NULL; 4956 err_free: 4957 kfree(assoc_data); 4958 return err; 4959 } 4960 4961 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4962 struct cfg80211_deauth_request *req) 4963 { 4964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4965 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4966 bool tx = !req->local_state_change; 4967 4968 if (ifmgd->auth_data && 4969 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4970 sdata_info(sdata, 4971 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4972 req->bssid, req->reason_code, 4973 ieee80211_get_reason_code_string(req->reason_code)); 4974 4975 drv_mgd_prepare_tx(sdata->local, sdata); 4976 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4977 IEEE80211_STYPE_DEAUTH, 4978 req->reason_code, tx, 4979 frame_buf); 4980 ieee80211_destroy_auth_data(sdata, false); 4981 ieee80211_report_disconnect(sdata, frame_buf, 4982 sizeof(frame_buf), true, 4983 req->reason_code); 4984 4985 return 0; 4986 } 4987 4988 if (ifmgd->assoc_data && 4989 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 4990 sdata_info(sdata, 4991 "aborting association with %pM by local choice (Reason: %u=%s)\n", 4992 req->bssid, req->reason_code, 4993 ieee80211_get_reason_code_string(req->reason_code)); 4994 4995 drv_mgd_prepare_tx(sdata->local, sdata); 4996 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4997 IEEE80211_STYPE_DEAUTH, 4998 req->reason_code, tx, 4999 frame_buf); 5000 ieee80211_destroy_assoc_data(sdata, false, true); 5001 ieee80211_report_disconnect(sdata, frame_buf, 5002 sizeof(frame_buf), true, 5003 req->reason_code); 5004 return 0; 5005 } 5006 5007 if (ifmgd->associated && 5008 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5009 sdata_info(sdata, 5010 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5011 req->bssid, req->reason_code, 5012 ieee80211_get_reason_code_string(req->reason_code)); 5013 5014 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5015 req->reason_code, tx, frame_buf); 5016 ieee80211_report_disconnect(sdata, frame_buf, 5017 sizeof(frame_buf), true, 5018 req->reason_code); 5019 return 0; 5020 } 5021 5022 return -ENOTCONN; 5023 } 5024 5025 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5026 struct cfg80211_disassoc_request *req) 5027 { 5028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5029 u8 bssid[ETH_ALEN]; 5030 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5031 5032 /* 5033 * cfg80211 should catch this ... but it's racy since 5034 * we can receive a disassoc frame, process it, hand it 5035 * to cfg80211 while that's in a locked section already 5036 * trying to tell us that the user wants to disconnect. 5037 */ 5038 if (ifmgd->associated != req->bss) 5039 return -ENOLINK; 5040 5041 sdata_info(sdata, 5042 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5043 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5044 5045 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5046 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5047 req->reason_code, !req->local_state_change, 5048 frame_buf); 5049 5050 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5051 req->reason_code); 5052 5053 return 0; 5054 } 5055 5056 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5057 { 5058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5059 5060 /* 5061 * Make sure some work items will not run after this, 5062 * they will not do anything but might not have been 5063 * cancelled when disconnecting. 5064 */ 5065 cancel_work_sync(&ifmgd->monitor_work); 5066 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5067 cancel_work_sync(&ifmgd->request_smps_work); 5068 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5069 cancel_work_sync(&ifmgd->chswitch_work); 5070 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5071 5072 sdata_lock(sdata); 5073 if (ifmgd->assoc_data) { 5074 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5075 ieee80211_destroy_assoc_data(sdata, false, false); 5076 cfg80211_assoc_timeout(sdata->dev, bss); 5077 } 5078 if (ifmgd->auth_data) 5079 ieee80211_destroy_auth_data(sdata, false); 5080 spin_lock_bh(&ifmgd->teardown_lock); 5081 if (ifmgd->teardown_skb) { 5082 kfree_skb(ifmgd->teardown_skb); 5083 ifmgd->teardown_skb = NULL; 5084 ifmgd->orig_teardown_skb = NULL; 5085 } 5086 spin_unlock_bh(&ifmgd->teardown_lock); 5087 del_timer_sync(&ifmgd->timer); 5088 sdata_unlock(sdata); 5089 } 5090 5091 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5092 enum nl80211_cqm_rssi_threshold_event rssi_event, 5093 s32 rssi_level, 5094 gfp_t gfp) 5095 { 5096 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5097 5098 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5099 5100 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5101 } 5102 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5103 5104 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5105 { 5106 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5107 5108 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5109 5110 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5111 } 5112 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5113