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 * Copyright (C) 2018 Intel Corporation 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 */ 16 17 #include <linux/delay.h> 18 #include <linux/if_ether.h> 19 #include <linux/skbuff.h> 20 #include <linux/if_arp.h> 21 #include <linux/etherdevice.h> 22 #include <linux/moduleparam.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/crc32.h> 25 #include <linux/slab.h> 26 #include <linux/export.h> 27 #include <net/mac80211.h> 28 #include <asm/unaligned.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "led.h" 34 #include "fils_aead.h" 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 43 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 44 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 45 #define IEEE80211_ASSOC_MAX_TRIES 3 46 47 static int max_nullfunc_tries = 2; 48 module_param(max_nullfunc_tries, int, 0644); 49 MODULE_PARM_DESC(max_nullfunc_tries, 50 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 51 52 static int max_probe_tries = 5; 53 module_param(max_probe_tries, int, 0644); 54 MODULE_PARM_DESC(max_probe_tries, 55 "Maximum probe tries before disconnecting (reason 4)."); 56 57 /* 58 * Beacon loss timeout is calculated as N frames times the 59 * advertised beacon interval. This may need to be somewhat 60 * higher than what hardware might detect to account for 61 * delays in the host processing frames. But since we also 62 * probe on beacon miss before declaring the connection lost 63 * default to what we want. 64 */ 65 static int beacon_loss_count = 7; 66 module_param(beacon_loss_count, int, 0644); 67 MODULE_PARM_DESC(beacon_loss_count, 68 "Number of beacon intervals before we decide beacon was lost."); 69 70 /* 71 * Time the connection can be idle before we probe 72 * it to see if we can still talk to the AP. 73 */ 74 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 75 /* 76 * Time we wait for a probe response after sending 77 * a probe request because of beacon loss or for 78 * checking the connection still works. 79 */ 80 static int probe_wait_ms = 500; 81 module_param(probe_wait_ms, int, 0644); 82 MODULE_PARM_DESC(probe_wait_ms, 83 "Maximum time(ms) to wait for probe response" 84 " before disconnecting (reason 4)."); 85 86 /* 87 * How many Beacon frames need to have been used in average signal strength 88 * before starting to indicate signal change events. 89 */ 90 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 91 92 /* 93 * We can have multiple work items (and connection probing) 94 * scheduling this timer, but we need to take care to only 95 * reschedule it when it should fire _earlier_ than it was 96 * asked for before, or if it's not pending right now. This 97 * function ensures that. Note that it then is required to 98 * run this function for all timeouts after the first one 99 * has happened -- the work that runs from this timer will 100 * do that. 101 */ 102 static void run_again(struct ieee80211_sub_if_data *sdata, 103 unsigned long timeout) 104 { 105 sdata_assert_lock(sdata); 106 107 if (!timer_pending(&sdata->u.mgd.timer) || 108 time_before(timeout, sdata->u.mgd.timer.expires)) 109 mod_timer(&sdata->u.mgd.timer, timeout); 110 } 111 112 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 113 { 114 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 115 return; 116 117 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 118 return; 119 120 mod_timer(&sdata->u.mgd.bcn_mon_timer, 121 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 122 } 123 124 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 125 { 126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 127 128 if (unlikely(!ifmgd->associated)) 129 return; 130 131 if (ifmgd->probe_send_count) 132 ifmgd->probe_send_count = 0; 133 134 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 135 return; 136 137 mod_timer(&ifmgd->conn_mon_timer, 138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 139 } 140 141 static int ecw2cw(int ecw) 142 { 143 return (1 << ecw) - 1; 144 } 145 146 static u32 147 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 148 struct ieee80211_supported_band *sband, 149 struct ieee80211_channel *channel, 150 const struct ieee80211_ht_operation *ht_oper, 151 const struct ieee80211_vht_operation *vht_oper, 152 struct cfg80211_chan_def *chandef, bool tracking) 153 { 154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 155 struct cfg80211_chan_def vht_chandef; 156 struct ieee80211_sta_ht_cap sta_ht_cap; 157 u32 ht_cfreq, ret; 158 159 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 160 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 161 162 chandef->chan = channel; 163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 164 chandef->center_freq1 = channel->center_freq; 165 chandef->center_freq2 = 0; 166 167 if (!ht_oper || !sta_ht_cap.ht_supported) { 168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 169 goto out; 170 } 171 172 chandef->width = NL80211_CHAN_WIDTH_20; 173 174 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 175 channel->band); 176 /* check that channel matches the right operating channel */ 177 if (!tracking && channel->center_freq != ht_cfreq) { 178 /* 179 * It's possible that some APs are confused here; 180 * Netgear WNDR3700 sometimes reports 4 higher than 181 * the actual channel in association responses, but 182 * since we look at probe response/beacon data here 183 * it should be OK. 184 */ 185 sdata_info(sdata, 186 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 187 channel->center_freq, ht_cfreq, 188 ht_oper->primary_chan, channel->band); 189 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 190 goto out; 191 } 192 193 /* check 40 MHz support, if we have it */ 194 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 195 ieee80211_chandef_ht_oper(ht_oper, chandef); 196 } else { 197 /* 40 MHz (and 80 MHz) must be supported for VHT */ 198 ret = IEEE80211_STA_DISABLE_VHT; 199 /* also mark 40 MHz disabled */ 200 ret |= IEEE80211_STA_DISABLE_40MHZ; 201 goto out; 202 } 203 204 if (!vht_oper || !sband->vht_cap.vht_supported) { 205 ret = IEEE80211_STA_DISABLE_VHT; 206 goto out; 207 } 208 209 vht_chandef = *chandef; 210 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 211 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 212 sdata_info(sdata, 213 "AP VHT information is invalid, disable VHT\n"); 214 ret = IEEE80211_STA_DISABLE_VHT; 215 goto out; 216 } 217 218 if (!cfg80211_chandef_valid(&vht_chandef)) { 219 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 220 sdata_info(sdata, 221 "AP VHT information is invalid, disable VHT\n"); 222 ret = IEEE80211_STA_DISABLE_VHT; 223 goto out; 224 } 225 226 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 227 ret = 0; 228 goto out; 229 } 230 231 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 233 sdata_info(sdata, 234 "AP VHT information doesn't match HT, disable VHT\n"); 235 ret = IEEE80211_STA_DISABLE_VHT; 236 goto out; 237 } 238 239 *chandef = vht_chandef; 240 241 ret = 0; 242 243 out: 244 /* 245 * When tracking the current AP, don't do any further checks if the 246 * new chandef is identical to the one we're currently using for the 247 * connection. This keeps us from playing ping-pong with regulatory, 248 * without it the following can happen (for example): 249 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 250 * - AP advertises regdom US 251 * - CRDA loads regdom US with 80 MHz prohibited (old database) 252 * - the code below detects an unsupported channel, downgrades, and 253 * we disconnect from the AP in the caller 254 * - disconnect causes CRDA to reload world regdomain and the game 255 * starts anew. 256 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 257 * 258 * It seems possible that there are still scenarios with CSA or real 259 * bandwidth changes where a this could happen, but those cases are 260 * less common and wouldn't completely prevent using the AP. 261 */ 262 if (tracking && 263 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 264 return ret; 265 266 /* don't print the message below for VHT mismatch if VHT is disabled */ 267 if (ret & IEEE80211_STA_DISABLE_VHT) 268 vht_chandef = *chandef; 269 270 /* 271 * Ignore the DISABLED flag when we're already connected and only 272 * tracking the APs beacon for bandwidth changes - otherwise we 273 * might get disconnected here if we connect to an AP, update our 274 * regulatory information based on the AP's country IE and the 275 * information we have is wrong/outdated and disables the channel 276 * that we're actually using for the connection to the AP. 277 */ 278 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 279 tracking ? 0 : 280 IEEE80211_CHAN_DISABLED)) { 281 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 282 ret = IEEE80211_STA_DISABLE_HT | 283 IEEE80211_STA_DISABLE_VHT; 284 break; 285 } 286 287 ret |= ieee80211_chandef_downgrade(chandef); 288 } 289 290 if (chandef->width != vht_chandef.width && !tracking) 291 sdata_info(sdata, 292 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 293 294 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 295 return ret; 296 } 297 298 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 299 struct sta_info *sta, 300 const struct ieee80211_ht_cap *ht_cap, 301 const struct ieee80211_ht_operation *ht_oper, 302 const struct ieee80211_vht_operation *vht_oper, 303 const u8 *bssid, u32 *changed) 304 { 305 struct ieee80211_local *local = sdata->local; 306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 307 struct ieee80211_supported_band *sband; 308 struct ieee80211_channel *chan; 309 struct cfg80211_chan_def chandef; 310 u16 ht_opmode; 311 u32 flags; 312 enum ieee80211_sta_rx_bandwidth new_sta_bw; 313 int ret; 314 315 /* if HT was/is disabled, don't track any bandwidth changes */ 316 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 317 return 0; 318 319 /* don't check VHT if we associated as non-VHT station */ 320 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 321 vht_oper = NULL; 322 323 if (WARN_ON_ONCE(!sta)) 324 return -EINVAL; 325 326 /* 327 * if bss configuration changed store the new one - 328 * this may be applicable even if channel is identical 329 */ 330 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 331 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 332 *changed |= BSS_CHANGED_HT; 333 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 334 } 335 336 chan = sdata->vif.bss_conf.chandef.chan; 337 sband = local->hw.wiphy->bands[chan->band]; 338 339 /* calculate new channel (type) based on HT/VHT operation IEs */ 340 flags = ieee80211_determine_chantype(sdata, sband, chan, 341 ht_oper, vht_oper, 342 &chandef, true); 343 344 /* 345 * Downgrade the new channel if we associated with restricted 346 * capabilities. For example, if we associated as a 20 MHz STA 347 * to a 40 MHz AP (due to regulatory, capabilities or config 348 * reasons) then switching to a 40 MHz channel now won't do us 349 * any good -- we couldn't use it with the AP. 350 */ 351 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 352 chandef.width == NL80211_CHAN_WIDTH_80P80) 353 flags |= ieee80211_chandef_downgrade(&chandef); 354 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 355 chandef.width == NL80211_CHAN_WIDTH_160) 356 flags |= ieee80211_chandef_downgrade(&chandef); 357 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 358 chandef.width > NL80211_CHAN_WIDTH_20) 359 flags |= ieee80211_chandef_downgrade(&chandef); 360 361 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 362 return 0; 363 364 sdata_info(sdata, 365 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 366 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 367 chandef.center_freq1, chandef.center_freq2); 368 369 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 370 IEEE80211_STA_DISABLE_VHT | 371 IEEE80211_STA_DISABLE_40MHZ | 372 IEEE80211_STA_DISABLE_80P80MHZ | 373 IEEE80211_STA_DISABLE_160MHZ)) || 374 !cfg80211_chandef_valid(&chandef)) { 375 sdata_info(sdata, 376 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 377 ifmgd->bssid); 378 return -EINVAL; 379 } 380 381 switch (chandef.width) { 382 case NL80211_CHAN_WIDTH_20_NOHT: 383 case NL80211_CHAN_WIDTH_20: 384 new_sta_bw = IEEE80211_STA_RX_BW_20; 385 break; 386 case NL80211_CHAN_WIDTH_40: 387 new_sta_bw = IEEE80211_STA_RX_BW_40; 388 break; 389 case NL80211_CHAN_WIDTH_80: 390 new_sta_bw = IEEE80211_STA_RX_BW_80; 391 break; 392 case NL80211_CHAN_WIDTH_80P80: 393 case NL80211_CHAN_WIDTH_160: 394 new_sta_bw = IEEE80211_STA_RX_BW_160; 395 break; 396 default: 397 return -EINVAL; 398 } 399 400 if (new_sta_bw > sta->cur_max_bandwidth) 401 new_sta_bw = sta->cur_max_bandwidth; 402 403 if (new_sta_bw < sta->sta.bandwidth) { 404 sta->sta.bandwidth = new_sta_bw; 405 rate_control_rate_update(local, sband, sta, 406 IEEE80211_RC_BW_CHANGED); 407 } 408 409 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 410 if (ret) { 411 sdata_info(sdata, 412 "AP %pM changed bandwidth to incompatible one - disconnect\n", 413 ifmgd->bssid); 414 return ret; 415 } 416 417 if (new_sta_bw > sta->sta.bandwidth) { 418 sta->sta.bandwidth = new_sta_bw; 419 rate_control_rate_update(local, sband, sta, 420 IEEE80211_RC_BW_CHANGED); 421 } 422 423 return 0; 424 } 425 426 /* frame sending functions */ 427 428 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 429 struct sk_buff *skb, u8 ap_ht_param, 430 struct ieee80211_supported_band *sband, 431 struct ieee80211_channel *channel, 432 enum ieee80211_smps_mode smps) 433 { 434 u8 *pos; 435 u32 flags = channel->flags; 436 u16 cap; 437 struct ieee80211_sta_ht_cap ht_cap; 438 439 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 440 441 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 442 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 443 444 /* determine capability flags */ 445 cap = ht_cap.cap; 446 447 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 448 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 449 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 450 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 451 cap &= ~IEEE80211_HT_CAP_SGI_40; 452 } 453 break; 454 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 455 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 457 cap &= ~IEEE80211_HT_CAP_SGI_40; 458 } 459 break; 460 } 461 462 /* 463 * If 40 MHz was disabled associate as though we weren't 464 * capable of 40 MHz -- some broken APs will never fall 465 * back to trying to transmit in 20 MHz. 466 */ 467 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 468 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 469 cap &= ~IEEE80211_HT_CAP_SGI_40; 470 } 471 472 /* set SM PS mode properly */ 473 cap &= ~IEEE80211_HT_CAP_SM_PS; 474 switch (smps) { 475 case IEEE80211_SMPS_AUTOMATIC: 476 case IEEE80211_SMPS_NUM_MODES: 477 WARN_ON(1); 478 /* fall through */ 479 case IEEE80211_SMPS_OFF: 480 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 481 IEEE80211_HT_CAP_SM_PS_SHIFT; 482 break; 483 case IEEE80211_SMPS_STATIC: 484 cap |= WLAN_HT_CAP_SM_PS_STATIC << 485 IEEE80211_HT_CAP_SM_PS_SHIFT; 486 break; 487 case IEEE80211_SMPS_DYNAMIC: 488 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 489 IEEE80211_HT_CAP_SM_PS_SHIFT; 490 break; 491 } 492 493 /* reserve and fill IE */ 494 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 495 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 496 } 497 498 /* This function determines vht capability flags for the association 499 * and builds the IE. 500 * Note - the function may set the owner of the MU-MIMO capability 501 */ 502 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 503 struct sk_buff *skb, 504 struct ieee80211_supported_band *sband, 505 struct ieee80211_vht_cap *ap_vht_cap) 506 { 507 struct ieee80211_local *local = sdata->local; 508 u8 *pos; 509 u32 cap; 510 struct ieee80211_sta_vht_cap vht_cap; 511 u32 mask, ap_bf_sts, our_bf_sts; 512 513 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 514 515 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 516 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 517 518 /* determine capability flags */ 519 cap = vht_cap.cap; 520 521 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 522 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 523 524 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 525 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 526 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 527 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 528 } 529 530 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 531 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 532 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 533 } 534 535 /* 536 * Some APs apparently get confused if our capabilities are better 537 * than theirs, so restrict what we advertise in the assoc request. 538 */ 539 if (!(ap_vht_cap->vht_cap_info & 540 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 541 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 542 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 543 else if (!(ap_vht_cap->vht_cap_info & 544 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 545 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 546 547 /* 548 * If some other vif is using the MU-MIMO capablity we cannot associate 549 * using MU-MIMO - this will lead to contradictions in the group-id 550 * mechanism. 551 * Ownership is defined since association request, in order to avoid 552 * simultaneous associations with MU-MIMO. 553 */ 554 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 555 bool disable_mu_mimo = false; 556 struct ieee80211_sub_if_data *other; 557 558 list_for_each_entry_rcu(other, &local->interfaces, list) { 559 if (other->vif.mu_mimo_owner) { 560 disable_mu_mimo = true; 561 break; 562 } 563 } 564 if (disable_mu_mimo) 565 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 566 else 567 sdata->vif.mu_mimo_owner = true; 568 } 569 570 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 571 572 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 573 our_bf_sts = cap & mask; 574 575 if (ap_bf_sts < our_bf_sts) { 576 cap &= ~mask; 577 cap |= ap_bf_sts; 578 } 579 580 /* reserve and fill IE */ 581 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 582 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 583 } 584 585 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 586 { 587 struct ieee80211_local *local = sdata->local; 588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 589 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 590 struct sk_buff *skb; 591 struct ieee80211_mgmt *mgmt; 592 u8 *pos, qos_info; 593 size_t offset = 0, noffset; 594 int i, count, rates_len, supp_rates_len, shift; 595 u16 capab; 596 struct ieee80211_supported_band *sband; 597 struct ieee80211_chanctx_conf *chanctx_conf; 598 struct ieee80211_channel *chan; 599 u32 rates = 0; 600 601 sdata_assert_lock(sdata); 602 603 rcu_read_lock(); 604 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 605 if (WARN_ON(!chanctx_conf)) { 606 rcu_read_unlock(); 607 return; 608 } 609 chan = chanctx_conf->def.chan; 610 rcu_read_unlock(); 611 sband = local->hw.wiphy->bands[chan->band]; 612 shift = ieee80211_vif_get_shift(&sdata->vif); 613 614 if (assoc_data->supp_rates_len) { 615 /* 616 * Get all rates supported by the device and the AP as 617 * some APs don't like getting a superset of their rates 618 * in the association request (e.g. D-Link DAP 1353 in 619 * b-only mode)... 620 */ 621 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 622 assoc_data->supp_rates, 623 assoc_data->supp_rates_len, 624 &rates); 625 } else { 626 /* 627 * In case AP not provide any supported rates information 628 * before association, we send information element(s) with 629 * all rates that we support. 630 */ 631 rates_len = 0; 632 for (i = 0; i < sband->n_bitrates; i++) { 633 rates |= BIT(i); 634 rates_len++; 635 } 636 } 637 638 skb = alloc_skb(local->hw.extra_tx_headroom + 639 sizeof(*mgmt) + /* bit too much but doesn't matter */ 640 2 + assoc_data->ssid_len + /* SSID */ 641 4 + rates_len + /* (extended) rates */ 642 4 + /* power capability */ 643 2 + 2 * sband->n_channels + /* supported channels */ 644 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 645 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 646 assoc_data->ie_len + /* extra IEs */ 647 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 648 9, /* WMM */ 649 GFP_KERNEL); 650 if (!skb) 651 return; 652 653 skb_reserve(skb, local->hw.extra_tx_headroom); 654 655 capab = WLAN_CAPABILITY_ESS; 656 657 if (sband->band == NL80211_BAND_2GHZ) { 658 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 659 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 660 } 661 662 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 663 capab |= WLAN_CAPABILITY_PRIVACY; 664 665 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 666 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 667 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 668 669 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 670 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 671 672 mgmt = skb_put_zero(skb, 24); 673 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 674 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 675 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 676 677 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 678 skb_put(skb, 10); 679 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 680 IEEE80211_STYPE_REASSOC_REQ); 681 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 682 mgmt->u.reassoc_req.listen_interval = 683 cpu_to_le16(local->hw.conf.listen_interval); 684 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 685 ETH_ALEN); 686 } else { 687 skb_put(skb, 4); 688 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 689 IEEE80211_STYPE_ASSOC_REQ); 690 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 691 mgmt->u.assoc_req.listen_interval = 692 cpu_to_le16(local->hw.conf.listen_interval); 693 } 694 695 /* SSID */ 696 pos = skb_put(skb, 2 + assoc_data->ssid_len); 697 *pos++ = WLAN_EID_SSID; 698 *pos++ = assoc_data->ssid_len; 699 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 700 701 /* add all rates which were marked to be used above */ 702 supp_rates_len = rates_len; 703 if (supp_rates_len > 8) 704 supp_rates_len = 8; 705 706 pos = skb_put(skb, supp_rates_len + 2); 707 *pos++ = WLAN_EID_SUPP_RATES; 708 *pos++ = supp_rates_len; 709 710 count = 0; 711 for (i = 0; i < sband->n_bitrates; i++) { 712 if (BIT(i) & rates) { 713 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 714 5 * (1 << shift)); 715 *pos++ = (u8) rate; 716 if (++count == 8) 717 break; 718 } 719 } 720 721 if (rates_len > count) { 722 pos = skb_put(skb, rates_len - count + 2); 723 *pos++ = WLAN_EID_EXT_SUPP_RATES; 724 *pos++ = rates_len - count; 725 726 for (i++; i < sband->n_bitrates; i++) { 727 if (BIT(i) & rates) { 728 int rate; 729 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 730 5 * (1 << shift)); 731 *pos++ = (u8) rate; 732 } 733 } 734 } 735 736 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 737 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 738 pos = skb_put(skb, 4); 739 *pos++ = WLAN_EID_PWR_CAPABILITY; 740 *pos++ = 2; 741 *pos++ = 0; /* min tx power */ 742 /* max tx power */ 743 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 744 } 745 746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 747 /* TODO: get this in reg domain format */ 748 pos = skb_put(skb, 2 * sband->n_channels + 2); 749 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 750 *pos++ = 2 * sband->n_channels; 751 for (i = 0; i < sband->n_channels; i++) { 752 *pos++ = ieee80211_frequency_to_channel( 753 sband->channels[i].center_freq); 754 *pos++ = 1; /* one channel in the subband*/ 755 } 756 } 757 758 /* if present, add any custom IEs that go before HT */ 759 if (assoc_data->ie_len) { 760 static const u8 before_ht[] = { 761 WLAN_EID_SSID, 762 WLAN_EID_SUPP_RATES, 763 WLAN_EID_EXT_SUPP_RATES, 764 WLAN_EID_PWR_CAPABILITY, 765 WLAN_EID_SUPPORTED_CHANNELS, 766 WLAN_EID_RSN, 767 WLAN_EID_QOS_CAPA, 768 WLAN_EID_RRM_ENABLED_CAPABILITIES, 769 WLAN_EID_MOBILITY_DOMAIN, 770 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 771 WLAN_EID_RIC_DATA, /* reassoc only */ 772 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 773 }; 774 static const u8 after_ric[] = { 775 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 776 WLAN_EID_HT_CAPABILITY, 777 WLAN_EID_BSS_COEX_2040, 778 /* luckily this is almost always there */ 779 WLAN_EID_EXT_CAPABILITY, 780 WLAN_EID_QOS_TRAFFIC_CAPA, 781 WLAN_EID_TIM_BCAST_REQ, 782 WLAN_EID_INTERWORKING, 783 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 784 WLAN_EID_VHT_CAPABILITY, 785 WLAN_EID_OPMODE_NOTIF, 786 }; 787 788 noffset = ieee80211_ie_split_ric(assoc_data->ie, 789 assoc_data->ie_len, 790 before_ht, 791 ARRAY_SIZE(before_ht), 792 after_ric, 793 ARRAY_SIZE(after_ric), 794 offset); 795 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 796 offset = noffset; 797 } 798 799 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 800 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 801 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 802 803 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 804 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 805 sband, chan, sdata->smps_mode); 806 807 /* if present, add any custom IEs that go before VHT */ 808 if (assoc_data->ie_len) { 809 static const u8 before_vht[] = { 810 /* 811 * no need to list the ones split off before HT 812 * or generated here 813 */ 814 WLAN_EID_BSS_COEX_2040, 815 WLAN_EID_EXT_CAPABILITY, 816 WLAN_EID_QOS_TRAFFIC_CAPA, 817 WLAN_EID_TIM_BCAST_REQ, 818 WLAN_EID_INTERWORKING, 819 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 820 }; 821 822 /* RIC already taken above, so no need to handle here anymore */ 823 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 824 before_vht, ARRAY_SIZE(before_vht), 825 offset); 826 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 827 offset = noffset; 828 } 829 830 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 831 ieee80211_add_vht_ie(sdata, skb, sband, 832 &assoc_data->ap_vht_cap); 833 834 /* if present, add any custom non-vendor IEs that go after HT */ 835 if (assoc_data->ie_len) { 836 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 837 assoc_data->ie_len, 838 offset); 839 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 840 offset = noffset; 841 } 842 843 if (assoc_data->wmm) { 844 if (assoc_data->uapsd) { 845 qos_info = ifmgd->uapsd_queues; 846 qos_info |= (ifmgd->uapsd_max_sp_len << 847 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 848 } else { 849 qos_info = 0; 850 } 851 852 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 853 } 854 855 /* add any remaining custom (i.e. vendor specific here) IEs */ 856 if (assoc_data->ie_len) { 857 noffset = assoc_data->ie_len; 858 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 859 } 860 861 if (assoc_data->fils_kek_len && 862 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 863 dev_kfree_skb(skb); 864 return; 865 } 866 867 drv_mgd_prepare_tx(local, sdata); 868 869 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 870 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 871 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 872 IEEE80211_TX_INTFL_MLME_CONN_TX; 873 ieee80211_tx_skb(sdata, skb); 874 } 875 876 void ieee80211_send_pspoll(struct ieee80211_local *local, 877 struct ieee80211_sub_if_data *sdata) 878 { 879 struct ieee80211_pspoll *pspoll; 880 struct sk_buff *skb; 881 882 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 883 if (!skb) 884 return; 885 886 pspoll = (struct ieee80211_pspoll *) skb->data; 887 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 888 889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 890 ieee80211_tx_skb(sdata, skb); 891 } 892 893 void ieee80211_send_nullfunc(struct ieee80211_local *local, 894 struct ieee80211_sub_if_data *sdata, 895 bool powersave) 896 { 897 struct sk_buff *skb; 898 struct ieee80211_hdr_3addr *nullfunc; 899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 900 901 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 902 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 903 if (!skb) 904 return; 905 906 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 907 if (powersave) 908 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 909 910 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 911 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 912 913 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 915 916 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 917 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 918 919 ieee80211_tx_skb(sdata, skb); 920 } 921 922 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 923 struct ieee80211_sub_if_data *sdata) 924 { 925 struct sk_buff *skb; 926 struct ieee80211_hdr *nullfunc; 927 __le16 fc; 928 929 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 930 return; 931 932 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 933 if (!skb) 934 return; 935 936 skb_reserve(skb, local->hw.extra_tx_headroom); 937 938 nullfunc = skb_put_zero(skb, 30); 939 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 940 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 941 nullfunc->frame_control = fc; 942 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 943 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 944 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 945 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 946 947 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 948 ieee80211_tx_skb(sdata, skb); 949 } 950 951 /* spectrum management related things */ 952 static void ieee80211_chswitch_work(struct work_struct *work) 953 { 954 struct ieee80211_sub_if_data *sdata = 955 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 956 struct ieee80211_local *local = sdata->local; 957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 958 int ret; 959 960 if (!ieee80211_sdata_running(sdata)) 961 return; 962 963 sdata_lock(sdata); 964 mutex_lock(&local->mtx); 965 mutex_lock(&local->chanctx_mtx); 966 967 if (!ifmgd->associated) 968 goto out; 969 970 if (!sdata->vif.csa_active) 971 goto out; 972 973 /* 974 * using reservation isn't immediate as it may be deferred until later 975 * with multi-vif. once reservation is complete it will re-schedule the 976 * work with no reserved_chanctx so verify chandef to check if it 977 * completed successfully 978 */ 979 980 if (sdata->reserved_chanctx) { 981 /* 982 * with multi-vif csa driver may call ieee80211_csa_finish() 983 * many times while waiting for other interfaces to use their 984 * reservations 985 */ 986 if (sdata->reserved_ready) 987 goto out; 988 989 ret = ieee80211_vif_use_reserved_context(sdata); 990 if (ret) { 991 sdata_info(sdata, 992 "failed to use reserved channel context, disconnecting (err=%d)\n", 993 ret); 994 ieee80211_queue_work(&sdata->local->hw, 995 &ifmgd->csa_connection_drop_work); 996 goto out; 997 } 998 999 goto out; 1000 } 1001 1002 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1003 &sdata->csa_chandef)) { 1004 sdata_info(sdata, 1005 "failed to finalize channel switch, disconnecting\n"); 1006 ieee80211_queue_work(&sdata->local->hw, 1007 &ifmgd->csa_connection_drop_work); 1008 goto out; 1009 } 1010 1011 /* XXX: shouldn't really modify cfg80211-owned data! */ 1012 ifmgd->associated->channel = sdata->csa_chandef.chan; 1013 1014 ifmgd->csa_waiting_bcn = true; 1015 1016 ieee80211_sta_reset_beacon_monitor(sdata); 1017 ieee80211_sta_reset_conn_monitor(sdata); 1018 1019 out: 1020 mutex_unlock(&local->chanctx_mtx); 1021 mutex_unlock(&local->mtx); 1022 sdata_unlock(sdata); 1023 } 1024 1025 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1026 { 1027 struct ieee80211_local *local = sdata->local; 1028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1029 int ret; 1030 1031 sdata_assert_lock(sdata); 1032 1033 WARN_ON(!sdata->vif.csa_active); 1034 1035 if (sdata->csa_block_tx) { 1036 ieee80211_wake_vif_queues(local, sdata, 1037 IEEE80211_QUEUE_STOP_REASON_CSA); 1038 sdata->csa_block_tx = false; 1039 } 1040 1041 sdata->vif.csa_active = false; 1042 ifmgd->csa_waiting_bcn = false; 1043 1044 ret = drv_post_channel_switch(sdata); 1045 if (ret) { 1046 sdata_info(sdata, 1047 "driver post channel switch failed, disconnecting\n"); 1048 ieee80211_queue_work(&local->hw, 1049 &ifmgd->csa_connection_drop_work); 1050 return; 1051 } 1052 1053 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1054 } 1055 1056 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1057 { 1058 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1060 1061 trace_api_chswitch_done(sdata, success); 1062 if (!success) { 1063 sdata_info(sdata, 1064 "driver channel switch failed, disconnecting\n"); 1065 ieee80211_queue_work(&sdata->local->hw, 1066 &ifmgd->csa_connection_drop_work); 1067 } else { 1068 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1069 } 1070 } 1071 EXPORT_SYMBOL(ieee80211_chswitch_done); 1072 1073 static void ieee80211_chswitch_timer(struct timer_list *t) 1074 { 1075 struct ieee80211_sub_if_data *sdata = 1076 from_timer(sdata, t, u.mgd.chswitch_timer); 1077 1078 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1079 } 1080 1081 static void 1082 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1083 u64 timestamp, u32 device_timestamp, 1084 struct ieee802_11_elems *elems, 1085 bool beacon) 1086 { 1087 struct ieee80211_local *local = sdata->local; 1088 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1089 struct cfg80211_bss *cbss = ifmgd->associated; 1090 struct ieee80211_chanctx_conf *conf; 1091 struct ieee80211_chanctx *chanctx; 1092 enum nl80211_band current_band; 1093 struct ieee80211_csa_ie csa_ie; 1094 struct ieee80211_channel_switch ch_switch; 1095 int res; 1096 1097 sdata_assert_lock(sdata); 1098 1099 if (!cbss) 1100 return; 1101 1102 if (local->scanning) 1103 return; 1104 1105 /* disregard subsequent announcements if we are already processing */ 1106 if (sdata->vif.csa_active) 1107 return; 1108 1109 current_band = cbss->channel->band; 1110 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1111 ifmgd->flags, 1112 ifmgd->associated->bssid, &csa_ie); 1113 if (res < 0) 1114 ieee80211_queue_work(&local->hw, 1115 &ifmgd->csa_connection_drop_work); 1116 if (res) 1117 return; 1118 1119 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1120 IEEE80211_CHAN_DISABLED)) { 1121 sdata_info(sdata, 1122 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1123 ifmgd->associated->bssid, 1124 csa_ie.chandef.chan->center_freq, 1125 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1126 csa_ie.chandef.center_freq2); 1127 ieee80211_queue_work(&local->hw, 1128 &ifmgd->csa_connection_drop_work); 1129 return; 1130 } 1131 1132 if (cfg80211_chandef_identical(&csa_ie.chandef, 1133 &sdata->vif.bss_conf.chandef)) { 1134 if (ifmgd->csa_ignored_same_chan) 1135 return; 1136 sdata_info(sdata, 1137 "AP %pM tries to chanswitch to same channel, ignore\n", 1138 ifmgd->associated->bssid); 1139 ifmgd->csa_ignored_same_chan = true; 1140 return; 1141 } 1142 1143 /* 1144 * Drop all TDLS peers - either we disconnect or move to a different 1145 * channel from this point on. There's no telling what our peer will do. 1146 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1147 * have an incompatible wider chandef. 1148 */ 1149 ieee80211_teardown_tdls_peers(sdata); 1150 1151 mutex_lock(&local->mtx); 1152 mutex_lock(&local->chanctx_mtx); 1153 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1154 lockdep_is_held(&local->chanctx_mtx)); 1155 if (!conf) { 1156 sdata_info(sdata, 1157 "no channel context assigned to vif?, disconnecting\n"); 1158 goto drop_connection; 1159 } 1160 1161 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1162 1163 if (local->use_chanctx && 1164 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1165 sdata_info(sdata, 1166 "driver doesn't support chan-switch with channel contexts\n"); 1167 goto drop_connection; 1168 } 1169 1170 ch_switch.timestamp = timestamp; 1171 ch_switch.device_timestamp = device_timestamp; 1172 ch_switch.block_tx = csa_ie.mode; 1173 ch_switch.chandef = csa_ie.chandef; 1174 ch_switch.count = csa_ie.count; 1175 1176 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1177 sdata_info(sdata, 1178 "preparing for channel switch failed, disconnecting\n"); 1179 goto drop_connection; 1180 } 1181 1182 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1183 chanctx->mode, false); 1184 if (res) { 1185 sdata_info(sdata, 1186 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1187 res); 1188 goto drop_connection; 1189 } 1190 mutex_unlock(&local->chanctx_mtx); 1191 1192 sdata->vif.csa_active = true; 1193 sdata->csa_chandef = csa_ie.chandef; 1194 sdata->csa_block_tx = csa_ie.mode; 1195 ifmgd->csa_ignored_same_chan = false; 1196 1197 if (sdata->csa_block_tx) 1198 ieee80211_stop_vif_queues(local, sdata, 1199 IEEE80211_QUEUE_STOP_REASON_CSA); 1200 mutex_unlock(&local->mtx); 1201 1202 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1203 csa_ie.count); 1204 1205 if (local->ops->channel_switch) { 1206 /* use driver's channel switch callback */ 1207 drv_channel_switch(local, sdata, &ch_switch); 1208 return; 1209 } 1210 1211 /* channel switch handled in software */ 1212 if (csa_ie.count <= 1) 1213 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1214 else 1215 mod_timer(&ifmgd->chswitch_timer, 1216 TU_TO_EXP_TIME((csa_ie.count - 1) * 1217 cbss->beacon_interval)); 1218 return; 1219 drop_connection: 1220 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1221 mutex_unlock(&local->chanctx_mtx); 1222 mutex_unlock(&local->mtx); 1223 } 1224 1225 static bool 1226 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1227 struct ieee80211_channel *channel, 1228 const u8 *country_ie, u8 country_ie_len, 1229 const u8 *pwr_constr_elem, 1230 int *chan_pwr, int *pwr_reduction) 1231 { 1232 struct ieee80211_country_ie_triplet *triplet; 1233 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1234 int i, chan_increment; 1235 bool have_chan_pwr = false; 1236 1237 /* Invalid IE */ 1238 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1239 return false; 1240 1241 triplet = (void *)(country_ie + 3); 1242 country_ie_len -= 3; 1243 1244 switch (channel->band) { 1245 default: 1246 WARN_ON_ONCE(1); 1247 /* fall through */ 1248 case NL80211_BAND_2GHZ: 1249 case NL80211_BAND_60GHZ: 1250 chan_increment = 1; 1251 break; 1252 case NL80211_BAND_5GHZ: 1253 chan_increment = 4; 1254 break; 1255 } 1256 1257 /* find channel */ 1258 while (country_ie_len >= 3) { 1259 u8 first_channel = triplet->chans.first_channel; 1260 1261 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1262 goto next; 1263 1264 for (i = 0; i < triplet->chans.num_channels; i++) { 1265 if (first_channel + i * chan_increment == chan) { 1266 have_chan_pwr = true; 1267 *chan_pwr = triplet->chans.max_power; 1268 break; 1269 } 1270 } 1271 if (have_chan_pwr) 1272 break; 1273 1274 next: 1275 triplet++; 1276 country_ie_len -= 3; 1277 } 1278 1279 if (have_chan_pwr && pwr_constr_elem) 1280 *pwr_reduction = *pwr_constr_elem; 1281 else 1282 *pwr_reduction = 0; 1283 1284 return have_chan_pwr; 1285 } 1286 1287 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1288 struct ieee80211_channel *channel, 1289 const u8 *cisco_dtpc_ie, 1290 int *pwr_level) 1291 { 1292 /* From practical testing, the first data byte of the DTPC element 1293 * seems to contain the requested dBm level, and the CLI on Cisco 1294 * APs clearly state the range is -127 to 127 dBm, which indicates 1295 * a signed byte, although it seemingly never actually goes negative. 1296 * The other byte seems to always be zero. 1297 */ 1298 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1299 } 1300 1301 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1302 struct ieee80211_channel *channel, 1303 struct ieee80211_mgmt *mgmt, 1304 const u8 *country_ie, u8 country_ie_len, 1305 const u8 *pwr_constr_ie, 1306 const u8 *cisco_dtpc_ie) 1307 { 1308 bool has_80211h_pwr = false, has_cisco_pwr = false; 1309 int chan_pwr = 0, pwr_reduction_80211h = 0; 1310 int pwr_level_cisco, pwr_level_80211h; 1311 int new_ap_level; 1312 __le16 capab = mgmt->u.probe_resp.capab_info; 1313 1314 if (country_ie && 1315 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1316 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1317 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1318 sdata, channel, country_ie, country_ie_len, 1319 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1320 pwr_level_80211h = 1321 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1322 } 1323 1324 if (cisco_dtpc_ie) { 1325 ieee80211_find_cisco_dtpc( 1326 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1327 has_cisco_pwr = true; 1328 } 1329 1330 if (!has_80211h_pwr && !has_cisco_pwr) 1331 return 0; 1332 1333 /* If we have both 802.11h and Cisco DTPC, apply both limits 1334 * by picking the smallest of the two power levels advertised. 1335 */ 1336 if (has_80211h_pwr && 1337 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1338 new_ap_level = pwr_level_80211h; 1339 1340 if (sdata->ap_power_level == new_ap_level) 1341 return 0; 1342 1343 sdata_dbg(sdata, 1344 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1345 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1346 sdata->u.mgd.bssid); 1347 } else { /* has_cisco_pwr is always true here. */ 1348 new_ap_level = pwr_level_cisco; 1349 1350 if (sdata->ap_power_level == new_ap_level) 1351 return 0; 1352 1353 sdata_dbg(sdata, 1354 "Limiting TX power to %d dBm as advertised by %pM\n", 1355 pwr_level_cisco, sdata->u.mgd.bssid); 1356 } 1357 1358 sdata->ap_power_level = new_ap_level; 1359 if (__ieee80211_recalc_txpower(sdata)) 1360 return BSS_CHANGED_TXPOWER; 1361 return 0; 1362 } 1363 1364 /* powersave */ 1365 static void ieee80211_enable_ps(struct ieee80211_local *local, 1366 struct ieee80211_sub_if_data *sdata) 1367 { 1368 struct ieee80211_conf *conf = &local->hw.conf; 1369 1370 /* 1371 * If we are scanning right now then the parameters will 1372 * take effect when scan finishes. 1373 */ 1374 if (local->scanning) 1375 return; 1376 1377 if (conf->dynamic_ps_timeout > 0 && 1378 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1379 mod_timer(&local->dynamic_ps_timer, jiffies + 1380 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1381 } else { 1382 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1383 ieee80211_send_nullfunc(local, sdata, true); 1384 1385 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1386 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1387 return; 1388 1389 conf->flags |= IEEE80211_CONF_PS; 1390 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1391 } 1392 } 1393 1394 static void ieee80211_change_ps(struct ieee80211_local *local) 1395 { 1396 struct ieee80211_conf *conf = &local->hw.conf; 1397 1398 if (local->ps_sdata) { 1399 ieee80211_enable_ps(local, local->ps_sdata); 1400 } else if (conf->flags & IEEE80211_CONF_PS) { 1401 conf->flags &= ~IEEE80211_CONF_PS; 1402 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1403 del_timer_sync(&local->dynamic_ps_timer); 1404 cancel_work_sync(&local->dynamic_ps_enable_work); 1405 } 1406 } 1407 1408 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1409 { 1410 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1411 struct sta_info *sta = NULL; 1412 bool authorized = false; 1413 1414 if (!mgd->powersave) 1415 return false; 1416 1417 if (mgd->broken_ap) 1418 return false; 1419 1420 if (!mgd->associated) 1421 return false; 1422 1423 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1424 return false; 1425 1426 if (!mgd->have_beacon) 1427 return false; 1428 1429 rcu_read_lock(); 1430 sta = sta_info_get(sdata, mgd->bssid); 1431 if (sta) 1432 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1433 rcu_read_unlock(); 1434 1435 return authorized; 1436 } 1437 1438 /* need to hold RTNL or interface lock */ 1439 void ieee80211_recalc_ps(struct ieee80211_local *local) 1440 { 1441 struct ieee80211_sub_if_data *sdata, *found = NULL; 1442 int count = 0; 1443 int timeout; 1444 1445 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1446 local->ps_sdata = NULL; 1447 return; 1448 } 1449 1450 list_for_each_entry(sdata, &local->interfaces, list) { 1451 if (!ieee80211_sdata_running(sdata)) 1452 continue; 1453 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1454 /* If an AP vif is found, then disable PS 1455 * by setting the count to zero thereby setting 1456 * ps_sdata to NULL. 1457 */ 1458 count = 0; 1459 break; 1460 } 1461 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1462 continue; 1463 found = sdata; 1464 count++; 1465 } 1466 1467 if (count == 1 && ieee80211_powersave_allowed(found)) { 1468 u8 dtimper = found->u.mgd.dtim_period; 1469 1470 timeout = local->dynamic_ps_forced_timeout; 1471 if (timeout < 0) 1472 timeout = 100; 1473 local->hw.conf.dynamic_ps_timeout = timeout; 1474 1475 /* If the TIM IE is invalid, pretend the value is 1 */ 1476 if (!dtimper) 1477 dtimper = 1; 1478 1479 local->hw.conf.ps_dtim_period = dtimper; 1480 local->ps_sdata = found; 1481 } else { 1482 local->ps_sdata = NULL; 1483 } 1484 1485 ieee80211_change_ps(local); 1486 } 1487 1488 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1489 { 1490 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1491 1492 if (sdata->vif.bss_conf.ps != ps_allowed) { 1493 sdata->vif.bss_conf.ps = ps_allowed; 1494 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1495 } 1496 } 1497 1498 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1499 { 1500 struct ieee80211_local *local = 1501 container_of(work, struct ieee80211_local, 1502 dynamic_ps_disable_work); 1503 1504 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1505 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1506 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1507 } 1508 1509 ieee80211_wake_queues_by_reason(&local->hw, 1510 IEEE80211_MAX_QUEUE_MAP, 1511 IEEE80211_QUEUE_STOP_REASON_PS, 1512 false); 1513 } 1514 1515 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1516 { 1517 struct ieee80211_local *local = 1518 container_of(work, struct ieee80211_local, 1519 dynamic_ps_enable_work); 1520 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1521 struct ieee80211_if_managed *ifmgd; 1522 unsigned long flags; 1523 int q; 1524 1525 /* can only happen when PS was just disabled anyway */ 1526 if (!sdata) 1527 return; 1528 1529 ifmgd = &sdata->u.mgd; 1530 1531 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1532 return; 1533 1534 if (local->hw.conf.dynamic_ps_timeout > 0) { 1535 /* don't enter PS if TX frames are pending */ 1536 if (drv_tx_frames_pending(local)) { 1537 mod_timer(&local->dynamic_ps_timer, jiffies + 1538 msecs_to_jiffies( 1539 local->hw.conf.dynamic_ps_timeout)); 1540 return; 1541 } 1542 1543 /* 1544 * transmission can be stopped by others which leads to 1545 * dynamic_ps_timer expiry. Postpone the ps timer if it 1546 * is not the actual idle state. 1547 */ 1548 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1549 for (q = 0; q < local->hw.queues; q++) { 1550 if (local->queue_stop_reasons[q]) { 1551 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1552 flags); 1553 mod_timer(&local->dynamic_ps_timer, jiffies + 1554 msecs_to_jiffies( 1555 local->hw.conf.dynamic_ps_timeout)); 1556 return; 1557 } 1558 } 1559 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1560 } 1561 1562 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1563 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1564 if (drv_tx_frames_pending(local)) { 1565 mod_timer(&local->dynamic_ps_timer, jiffies + 1566 msecs_to_jiffies( 1567 local->hw.conf.dynamic_ps_timeout)); 1568 } else { 1569 ieee80211_send_nullfunc(local, sdata, true); 1570 /* Flush to get the tx status of nullfunc frame */ 1571 ieee80211_flush_queues(local, sdata, false); 1572 } 1573 } 1574 1575 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1576 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1577 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1578 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1579 local->hw.conf.flags |= IEEE80211_CONF_PS; 1580 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1581 } 1582 } 1583 1584 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1585 { 1586 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1587 1588 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1589 } 1590 1591 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1592 { 1593 struct delayed_work *delayed_work = to_delayed_work(work); 1594 struct ieee80211_sub_if_data *sdata = 1595 container_of(delayed_work, struct ieee80211_sub_if_data, 1596 dfs_cac_timer_work); 1597 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1598 1599 mutex_lock(&sdata->local->mtx); 1600 if (sdata->wdev.cac_started) { 1601 ieee80211_vif_release_channel(sdata); 1602 cfg80211_cac_event(sdata->dev, &chandef, 1603 NL80211_RADAR_CAC_FINISHED, 1604 GFP_KERNEL); 1605 } 1606 mutex_unlock(&sdata->local->mtx); 1607 } 1608 1609 static bool 1610 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1611 { 1612 struct ieee80211_local *local = sdata->local; 1613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1614 bool ret = false; 1615 int ac; 1616 1617 if (local->hw.queues < IEEE80211_NUM_ACS) 1618 return false; 1619 1620 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1621 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1622 int non_acm_ac; 1623 unsigned long now = jiffies; 1624 1625 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1626 tx_tspec->admitted_time && 1627 time_after(now, tx_tspec->time_slice_start + HZ)) { 1628 tx_tspec->consumed_tx_time = 0; 1629 tx_tspec->time_slice_start = now; 1630 1631 if (tx_tspec->downgraded) 1632 tx_tspec->action = 1633 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1634 } 1635 1636 switch (tx_tspec->action) { 1637 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1638 /* take the original parameters */ 1639 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1640 sdata_err(sdata, 1641 "failed to set TX queue parameters for queue %d\n", 1642 ac); 1643 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1644 tx_tspec->downgraded = false; 1645 ret = true; 1646 break; 1647 case TX_TSPEC_ACTION_DOWNGRADE: 1648 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1649 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1650 ret = true; 1651 break; 1652 } 1653 /* downgrade next lower non-ACM AC */ 1654 for (non_acm_ac = ac + 1; 1655 non_acm_ac < IEEE80211_NUM_ACS; 1656 non_acm_ac++) 1657 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1658 break; 1659 /* Usually the loop will result in using BK even if it 1660 * requires admission control, but such a configuration 1661 * makes no sense and we have to transmit somehow - the 1662 * AC selection does the same thing. 1663 * If we started out trying to downgrade from BK, then 1664 * the extra condition here might be needed. 1665 */ 1666 if (non_acm_ac >= IEEE80211_NUM_ACS) 1667 non_acm_ac = IEEE80211_AC_BK; 1668 if (drv_conf_tx(local, sdata, ac, 1669 &sdata->tx_conf[non_acm_ac])) 1670 sdata_err(sdata, 1671 "failed to set TX queue parameters for queue %d\n", 1672 ac); 1673 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1674 ret = true; 1675 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1676 tx_tspec->time_slice_start + HZ - now + 1); 1677 break; 1678 case TX_TSPEC_ACTION_NONE: 1679 /* nothing now */ 1680 break; 1681 } 1682 } 1683 1684 return ret; 1685 } 1686 1687 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1688 { 1689 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1690 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1691 } 1692 1693 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1694 { 1695 struct ieee80211_sub_if_data *sdata; 1696 1697 sdata = container_of(work, struct ieee80211_sub_if_data, 1698 u.mgd.tx_tspec_wk.work); 1699 ieee80211_sta_handle_tspec_ac_params(sdata); 1700 } 1701 1702 /* MLME */ 1703 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1704 struct ieee80211_sub_if_data *sdata, 1705 const u8 *wmm_param, size_t wmm_param_len) 1706 { 1707 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1709 size_t left; 1710 int count, ac; 1711 const u8 *pos; 1712 u8 uapsd_queues = 0; 1713 1714 if (!local->ops->conf_tx) 1715 return false; 1716 1717 if (local->hw.queues < IEEE80211_NUM_ACS) 1718 return false; 1719 1720 if (!wmm_param) 1721 return false; 1722 1723 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1724 return false; 1725 1726 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1727 uapsd_queues = ifmgd->uapsd_queues; 1728 1729 count = wmm_param[6] & 0x0f; 1730 if (count == ifmgd->wmm_last_param_set) 1731 return false; 1732 ifmgd->wmm_last_param_set = count; 1733 1734 pos = wmm_param + 8; 1735 left = wmm_param_len - 8; 1736 1737 memset(¶ms, 0, sizeof(params)); 1738 1739 sdata->wmm_acm = 0; 1740 for (; left >= 4; left -= 4, pos += 4) { 1741 int aci = (pos[0] >> 5) & 0x03; 1742 int acm = (pos[0] >> 4) & 0x01; 1743 bool uapsd = false; 1744 1745 switch (aci) { 1746 case 1: /* AC_BK */ 1747 ac = IEEE80211_AC_BK; 1748 if (acm) 1749 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1750 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1751 uapsd = true; 1752 break; 1753 case 2: /* AC_VI */ 1754 ac = IEEE80211_AC_VI; 1755 if (acm) 1756 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1757 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1758 uapsd = true; 1759 break; 1760 case 3: /* AC_VO */ 1761 ac = IEEE80211_AC_VO; 1762 if (acm) 1763 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1764 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1765 uapsd = true; 1766 break; 1767 case 0: /* AC_BE */ 1768 default: 1769 ac = IEEE80211_AC_BE; 1770 if (acm) 1771 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1772 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1773 uapsd = true; 1774 break; 1775 } 1776 1777 params[ac].aifs = pos[0] & 0x0f; 1778 1779 if (params[ac].aifs < 2) { 1780 sdata_info(sdata, 1781 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1782 params[ac].aifs, aci); 1783 params[ac].aifs = 2; 1784 } 1785 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1786 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1787 params[ac].txop = get_unaligned_le16(pos + 2); 1788 params[ac].acm = acm; 1789 params[ac].uapsd = uapsd; 1790 1791 if (params[ac].cw_min == 0 || 1792 params[ac].cw_min > params[ac].cw_max) { 1793 sdata_info(sdata, 1794 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1795 params[ac].cw_min, params[ac].cw_max, aci); 1796 return false; 1797 } 1798 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 1799 } 1800 1801 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1802 mlme_dbg(sdata, 1803 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1804 ac, params[ac].acm, 1805 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1806 params[ac].txop, params[ac].uapsd, 1807 ifmgd->tx_tspec[ac].downgraded); 1808 sdata->tx_conf[ac] = params[ac]; 1809 if (!ifmgd->tx_tspec[ac].downgraded && 1810 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1811 sdata_err(sdata, 1812 "failed to set TX queue parameters for AC %d\n", 1813 ac); 1814 } 1815 1816 /* enable WMM or activate new settings */ 1817 sdata->vif.bss_conf.qos = true; 1818 return true; 1819 } 1820 1821 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1822 { 1823 lockdep_assert_held(&sdata->local->mtx); 1824 1825 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1826 ieee80211_run_deferred_scan(sdata->local); 1827 } 1828 1829 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1830 { 1831 mutex_lock(&sdata->local->mtx); 1832 __ieee80211_stop_poll(sdata); 1833 mutex_unlock(&sdata->local->mtx); 1834 } 1835 1836 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1837 u16 capab, bool erp_valid, u8 erp) 1838 { 1839 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1840 struct ieee80211_supported_band *sband; 1841 u32 changed = 0; 1842 bool use_protection; 1843 bool use_short_preamble; 1844 bool use_short_slot; 1845 1846 sband = ieee80211_get_sband(sdata); 1847 if (!sband) 1848 return changed; 1849 1850 if (erp_valid) { 1851 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1852 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1853 } else { 1854 use_protection = false; 1855 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1856 } 1857 1858 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1859 if (sband->band == NL80211_BAND_5GHZ) 1860 use_short_slot = true; 1861 1862 if (use_protection != bss_conf->use_cts_prot) { 1863 bss_conf->use_cts_prot = use_protection; 1864 changed |= BSS_CHANGED_ERP_CTS_PROT; 1865 } 1866 1867 if (use_short_preamble != bss_conf->use_short_preamble) { 1868 bss_conf->use_short_preamble = use_short_preamble; 1869 changed |= BSS_CHANGED_ERP_PREAMBLE; 1870 } 1871 1872 if (use_short_slot != bss_conf->use_short_slot) { 1873 bss_conf->use_short_slot = use_short_slot; 1874 changed |= BSS_CHANGED_ERP_SLOT; 1875 } 1876 1877 return changed; 1878 } 1879 1880 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1881 struct cfg80211_bss *cbss, 1882 u32 bss_info_changed) 1883 { 1884 struct ieee80211_bss *bss = (void *)cbss->priv; 1885 struct ieee80211_local *local = sdata->local; 1886 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1887 1888 bss_info_changed |= BSS_CHANGED_ASSOC; 1889 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1890 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1891 1892 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1893 beacon_loss_count * bss_conf->beacon_int)); 1894 1895 sdata->u.mgd.associated = cbss; 1896 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1897 1898 ieee80211_check_rate_mask(sdata); 1899 1900 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1901 1902 if (sdata->vif.p2p || 1903 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 1904 const struct cfg80211_bss_ies *ies; 1905 1906 rcu_read_lock(); 1907 ies = rcu_dereference(cbss->ies); 1908 if (ies) { 1909 int ret; 1910 1911 ret = cfg80211_get_p2p_attr( 1912 ies->data, ies->len, 1913 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1914 (u8 *) &bss_conf->p2p_noa_attr, 1915 sizeof(bss_conf->p2p_noa_attr)); 1916 if (ret >= 2) { 1917 sdata->u.mgd.p2p_noa_index = 1918 bss_conf->p2p_noa_attr.index; 1919 bss_info_changed |= BSS_CHANGED_P2P_PS; 1920 } 1921 } 1922 rcu_read_unlock(); 1923 } 1924 1925 /* just to be sure */ 1926 ieee80211_stop_poll(sdata); 1927 1928 ieee80211_led_assoc(local, 1); 1929 1930 if (sdata->u.mgd.have_beacon) { 1931 /* 1932 * If the AP is buggy we may get here with no DTIM period 1933 * known, so assume it's 1 which is the only safe assumption 1934 * in that case, although if the TIM IE is broken powersave 1935 * probably just won't work at all. 1936 */ 1937 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1938 bss_conf->beacon_rate = bss->beacon_rate; 1939 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1940 } else { 1941 bss_conf->beacon_rate = NULL; 1942 bss_conf->dtim_period = 0; 1943 } 1944 1945 bss_conf->assoc = 1; 1946 1947 /* Tell the driver to monitor connection quality (if supported) */ 1948 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1949 bss_conf->cqm_rssi_thold) 1950 bss_info_changed |= BSS_CHANGED_CQM; 1951 1952 /* Enable ARP filtering */ 1953 if (bss_conf->arp_addr_cnt) 1954 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1955 1956 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1957 1958 mutex_lock(&local->iflist_mtx); 1959 ieee80211_recalc_ps(local); 1960 mutex_unlock(&local->iflist_mtx); 1961 1962 ieee80211_recalc_smps(sdata); 1963 ieee80211_recalc_ps_vif(sdata); 1964 1965 netif_carrier_on(sdata->dev); 1966 } 1967 1968 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1969 u16 stype, u16 reason, bool tx, 1970 u8 *frame_buf) 1971 { 1972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1973 struct ieee80211_local *local = sdata->local; 1974 u32 changed = 0; 1975 1976 sdata_assert_lock(sdata); 1977 1978 if (WARN_ON_ONCE(tx && !frame_buf)) 1979 return; 1980 1981 if (WARN_ON(!ifmgd->associated)) 1982 return; 1983 1984 ieee80211_stop_poll(sdata); 1985 1986 ifmgd->associated = NULL; 1987 netif_carrier_off(sdata->dev); 1988 1989 /* 1990 * if we want to get out of ps before disassoc (why?) we have 1991 * to do it before sending disassoc, as otherwise the null-packet 1992 * won't be valid. 1993 */ 1994 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1995 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1996 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1997 } 1998 local->ps_sdata = NULL; 1999 2000 /* disable per-vif ps */ 2001 ieee80211_recalc_ps_vif(sdata); 2002 2003 /* make sure ongoing transmission finishes */ 2004 synchronize_net(); 2005 2006 /* 2007 * drop any frame before deauth/disassoc, this can be data or 2008 * management frame. Since we are disconnecting, we should not 2009 * insist sending these frames which can take time and delay 2010 * the disconnection and possible the roaming. 2011 */ 2012 if (tx) 2013 ieee80211_flush_queues(local, sdata, true); 2014 2015 /* deauthenticate/disassociate now */ 2016 if (tx || frame_buf) { 2017 /* 2018 * In multi channel scenarios guarantee that the virtual 2019 * interface is granted immediate airtime to transmit the 2020 * deauthentication frame by calling mgd_prepare_tx, if the 2021 * driver requested so. 2022 */ 2023 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2024 !ifmgd->have_beacon) 2025 drv_mgd_prepare_tx(sdata->local, sdata); 2026 2027 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2028 reason, tx, frame_buf); 2029 } 2030 2031 /* flush out frame - make sure the deauth was actually sent */ 2032 if (tx) 2033 ieee80211_flush_queues(local, sdata, false); 2034 2035 /* clear bssid only after building the needed mgmt frames */ 2036 eth_zero_addr(ifmgd->bssid); 2037 2038 /* remove AP and TDLS peers */ 2039 sta_info_flush(sdata); 2040 2041 /* finally reset all BSS / config parameters */ 2042 changed |= ieee80211_reset_erp_info(sdata); 2043 2044 ieee80211_led_assoc(local, 0); 2045 changed |= BSS_CHANGED_ASSOC; 2046 sdata->vif.bss_conf.assoc = false; 2047 2048 ifmgd->p2p_noa_index = -1; 2049 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2050 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2051 2052 /* on the next assoc, re-program HT/VHT parameters */ 2053 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2054 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2055 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2056 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2057 2058 /* reset MU-MIMO ownership and group data */ 2059 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2060 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2061 memset(sdata->vif.bss_conf.mu_group.position, 0, 2062 sizeof(sdata->vif.bss_conf.mu_group.position)); 2063 changed |= BSS_CHANGED_MU_GROUPS; 2064 sdata->vif.mu_mimo_owner = false; 2065 2066 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2067 2068 del_timer_sync(&local->dynamic_ps_timer); 2069 cancel_work_sync(&local->dynamic_ps_enable_work); 2070 2071 /* Disable ARP filtering */ 2072 if (sdata->vif.bss_conf.arp_addr_cnt) 2073 changed |= BSS_CHANGED_ARP_FILTER; 2074 2075 sdata->vif.bss_conf.qos = false; 2076 changed |= BSS_CHANGED_QOS; 2077 2078 /* The BSSID (not really interesting) and HT changed */ 2079 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2080 ieee80211_bss_info_change_notify(sdata, changed); 2081 2082 /* disassociated - set to defaults now */ 2083 ieee80211_set_wmm_default(sdata, false, false); 2084 2085 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2086 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2087 del_timer_sync(&sdata->u.mgd.timer); 2088 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2089 2090 sdata->vif.bss_conf.dtim_period = 0; 2091 sdata->vif.bss_conf.beacon_rate = NULL; 2092 2093 ifmgd->have_beacon = false; 2094 2095 ifmgd->flags = 0; 2096 mutex_lock(&local->mtx); 2097 ieee80211_vif_release_channel(sdata); 2098 2099 sdata->vif.csa_active = false; 2100 ifmgd->csa_waiting_bcn = false; 2101 ifmgd->csa_ignored_same_chan = false; 2102 if (sdata->csa_block_tx) { 2103 ieee80211_wake_vif_queues(local, sdata, 2104 IEEE80211_QUEUE_STOP_REASON_CSA); 2105 sdata->csa_block_tx = false; 2106 } 2107 mutex_unlock(&local->mtx); 2108 2109 /* existing TX TSPEC sessions no longer exist */ 2110 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2111 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2112 2113 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2114 } 2115 2116 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2117 struct ieee80211_hdr *hdr) 2118 { 2119 /* 2120 * We can postpone the mgd.timer whenever receiving unicast frames 2121 * from AP because we know that the connection is working both ways 2122 * at that time. But multicast frames (and hence also beacons) must 2123 * be ignored here, because we need to trigger the timer during 2124 * data idle periods for sending the periodic probe request to the 2125 * AP we're connected to. 2126 */ 2127 if (is_multicast_ether_addr(hdr->addr1)) 2128 return; 2129 2130 ieee80211_sta_reset_conn_monitor(sdata); 2131 } 2132 2133 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2134 { 2135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2136 struct ieee80211_local *local = sdata->local; 2137 2138 mutex_lock(&local->mtx); 2139 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2140 goto out; 2141 2142 __ieee80211_stop_poll(sdata); 2143 2144 mutex_lock(&local->iflist_mtx); 2145 ieee80211_recalc_ps(local); 2146 mutex_unlock(&local->iflist_mtx); 2147 2148 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2149 goto out; 2150 2151 /* 2152 * We've received a probe response, but are not sure whether 2153 * we have or will be receiving any beacons or data, so let's 2154 * schedule the timers again, just in case. 2155 */ 2156 ieee80211_sta_reset_beacon_monitor(sdata); 2157 2158 mod_timer(&ifmgd->conn_mon_timer, 2159 round_jiffies_up(jiffies + 2160 IEEE80211_CONNECTION_IDLE_TIME)); 2161 out: 2162 mutex_unlock(&local->mtx); 2163 } 2164 2165 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2166 struct ieee80211_hdr *hdr, 2167 u16 tx_time) 2168 { 2169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2170 u16 tid = ieee80211_get_tid(hdr); 2171 int ac = ieee80211_ac_from_tid(tid); 2172 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2173 unsigned long now = jiffies; 2174 2175 if (likely(!tx_tspec->admitted_time)) 2176 return; 2177 2178 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2179 tx_tspec->consumed_tx_time = 0; 2180 tx_tspec->time_slice_start = now; 2181 2182 if (tx_tspec->downgraded) { 2183 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2184 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2185 } 2186 } 2187 2188 if (tx_tspec->downgraded) 2189 return; 2190 2191 tx_tspec->consumed_tx_time += tx_time; 2192 2193 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2194 tx_tspec->downgraded = true; 2195 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2196 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2197 } 2198 } 2199 2200 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2201 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2202 { 2203 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2204 2205 if (!ieee80211_is_data(hdr->frame_control)) 2206 return; 2207 2208 if (ieee80211_is_nullfunc(hdr->frame_control) && 2209 sdata->u.mgd.probe_send_count > 0) { 2210 if (ack) 2211 ieee80211_sta_reset_conn_monitor(sdata); 2212 else 2213 sdata->u.mgd.nullfunc_failed = true; 2214 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2215 return; 2216 } 2217 2218 if (ack) 2219 ieee80211_sta_reset_conn_monitor(sdata); 2220 } 2221 2222 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2223 { 2224 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2225 const u8 *ssid; 2226 u8 *dst = ifmgd->associated->bssid; 2227 u8 unicast_limit = max(1, max_probe_tries - 3); 2228 struct sta_info *sta; 2229 2230 /* 2231 * Try sending broadcast probe requests for the last three 2232 * probe requests after the first ones failed since some 2233 * buggy APs only support broadcast probe requests. 2234 */ 2235 if (ifmgd->probe_send_count >= unicast_limit) 2236 dst = NULL; 2237 2238 /* 2239 * When the hardware reports an accurate Tx ACK status, it's 2240 * better to send a nullfunc frame instead of a probe request, 2241 * as it will kick us off the AP quickly if we aren't associated 2242 * anymore. The timeout will be reset if the frame is ACKed by 2243 * the AP. 2244 */ 2245 ifmgd->probe_send_count++; 2246 2247 if (dst) { 2248 mutex_lock(&sdata->local->sta_mtx); 2249 sta = sta_info_get(sdata, dst); 2250 if (!WARN_ON(!sta)) 2251 ieee80211_check_fast_rx(sta); 2252 mutex_unlock(&sdata->local->sta_mtx); 2253 } 2254 2255 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2256 ifmgd->nullfunc_failed = false; 2257 ieee80211_send_nullfunc(sdata->local, sdata, false); 2258 } else { 2259 int ssid_len; 2260 2261 rcu_read_lock(); 2262 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2263 if (WARN_ON_ONCE(ssid == NULL)) 2264 ssid_len = 0; 2265 else 2266 ssid_len = ssid[1]; 2267 2268 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2269 ssid + 2, ssid_len, NULL, 2270 0, (u32) -1, true, 0, 2271 ifmgd->associated->channel, false); 2272 rcu_read_unlock(); 2273 } 2274 2275 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2276 run_again(sdata, ifmgd->probe_timeout); 2277 } 2278 2279 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2280 bool beacon) 2281 { 2282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2283 bool already = false; 2284 2285 if (!ieee80211_sdata_running(sdata)) 2286 return; 2287 2288 sdata_lock(sdata); 2289 2290 if (!ifmgd->associated) 2291 goto out; 2292 2293 mutex_lock(&sdata->local->mtx); 2294 2295 if (sdata->local->tmp_channel || sdata->local->scanning) { 2296 mutex_unlock(&sdata->local->mtx); 2297 goto out; 2298 } 2299 2300 if (beacon) { 2301 mlme_dbg_ratelimited(sdata, 2302 "detected beacon loss from AP (missed %d beacons) - probing\n", 2303 beacon_loss_count); 2304 2305 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2306 } 2307 2308 /* 2309 * The driver/our work has already reported this event or the 2310 * connection monitoring has kicked in and we have already sent 2311 * a probe request. Or maybe the AP died and the driver keeps 2312 * reporting until we disassociate... 2313 * 2314 * In either case we have to ignore the current call to this 2315 * function (except for setting the correct probe reason bit) 2316 * because otherwise we would reset the timer every time and 2317 * never check whether we received a probe response! 2318 */ 2319 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2320 already = true; 2321 2322 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2323 2324 mutex_unlock(&sdata->local->mtx); 2325 2326 if (already) 2327 goto out; 2328 2329 mutex_lock(&sdata->local->iflist_mtx); 2330 ieee80211_recalc_ps(sdata->local); 2331 mutex_unlock(&sdata->local->iflist_mtx); 2332 2333 ifmgd->probe_send_count = 0; 2334 ieee80211_mgd_probe_ap_send(sdata); 2335 out: 2336 sdata_unlock(sdata); 2337 } 2338 2339 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2340 struct ieee80211_vif *vif) 2341 { 2342 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2344 struct cfg80211_bss *cbss; 2345 struct sk_buff *skb; 2346 const u8 *ssid; 2347 int ssid_len; 2348 2349 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2350 return NULL; 2351 2352 sdata_assert_lock(sdata); 2353 2354 if (ifmgd->associated) 2355 cbss = ifmgd->associated; 2356 else if (ifmgd->auth_data) 2357 cbss = ifmgd->auth_data->bss; 2358 else if (ifmgd->assoc_data) 2359 cbss = ifmgd->assoc_data->bss; 2360 else 2361 return NULL; 2362 2363 rcu_read_lock(); 2364 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2365 if (WARN_ON_ONCE(ssid == NULL)) 2366 ssid_len = 0; 2367 else 2368 ssid_len = ssid[1]; 2369 2370 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2371 (u32) -1, cbss->channel, 2372 ssid + 2, ssid_len, 2373 NULL, 0, true); 2374 rcu_read_unlock(); 2375 2376 return skb; 2377 } 2378 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2379 2380 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2381 const u8 *buf, size_t len, bool tx, 2382 u16 reason) 2383 { 2384 struct ieee80211_event event = { 2385 .type = MLME_EVENT, 2386 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2387 .u.mlme.reason = reason, 2388 }; 2389 2390 if (tx) 2391 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2392 else 2393 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2394 2395 drv_event_callback(sdata->local, sdata, &event); 2396 } 2397 2398 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2399 { 2400 struct ieee80211_local *local = sdata->local; 2401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2402 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2403 2404 sdata_lock(sdata); 2405 if (!ifmgd->associated) { 2406 sdata_unlock(sdata); 2407 return; 2408 } 2409 2410 /* AP is probably out of range (or not reachable for another reason) so 2411 * remove the bss struct for that AP. 2412 */ 2413 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2414 2415 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2416 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2417 true, frame_buf); 2418 mutex_lock(&local->mtx); 2419 sdata->vif.csa_active = false; 2420 ifmgd->csa_waiting_bcn = false; 2421 if (sdata->csa_block_tx) { 2422 ieee80211_wake_vif_queues(local, sdata, 2423 IEEE80211_QUEUE_STOP_REASON_CSA); 2424 sdata->csa_block_tx = false; 2425 } 2426 mutex_unlock(&local->mtx); 2427 2428 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2429 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2430 2431 sdata_unlock(sdata); 2432 } 2433 2434 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2435 { 2436 struct ieee80211_sub_if_data *sdata = 2437 container_of(work, struct ieee80211_sub_if_data, 2438 u.mgd.beacon_connection_loss_work); 2439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2440 2441 if (ifmgd->associated) 2442 ifmgd->beacon_loss_count++; 2443 2444 if (ifmgd->connection_loss) { 2445 sdata_info(sdata, "Connection to AP %pM lost\n", 2446 ifmgd->bssid); 2447 __ieee80211_disconnect(sdata); 2448 } else { 2449 ieee80211_mgd_probe_ap(sdata, true); 2450 } 2451 } 2452 2453 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2454 { 2455 struct ieee80211_sub_if_data *sdata = 2456 container_of(work, struct ieee80211_sub_if_data, 2457 u.mgd.csa_connection_drop_work); 2458 2459 __ieee80211_disconnect(sdata); 2460 } 2461 2462 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2463 { 2464 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2465 struct ieee80211_hw *hw = &sdata->local->hw; 2466 2467 trace_api_beacon_loss(sdata); 2468 2469 sdata->u.mgd.connection_loss = false; 2470 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2471 } 2472 EXPORT_SYMBOL(ieee80211_beacon_loss); 2473 2474 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2475 { 2476 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2477 struct ieee80211_hw *hw = &sdata->local->hw; 2478 2479 trace_api_connection_loss(sdata); 2480 2481 sdata->u.mgd.connection_loss = true; 2482 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2483 } 2484 EXPORT_SYMBOL(ieee80211_connection_loss); 2485 2486 2487 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2488 bool assoc) 2489 { 2490 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2491 2492 sdata_assert_lock(sdata); 2493 2494 if (!assoc) { 2495 /* 2496 * we are not authenticated yet, the only timer that could be 2497 * running is the timeout for the authentication response which 2498 * which is not relevant anymore. 2499 */ 2500 del_timer_sync(&sdata->u.mgd.timer); 2501 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2502 2503 eth_zero_addr(sdata->u.mgd.bssid); 2504 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2505 sdata->u.mgd.flags = 0; 2506 mutex_lock(&sdata->local->mtx); 2507 ieee80211_vif_release_channel(sdata); 2508 mutex_unlock(&sdata->local->mtx); 2509 } 2510 2511 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2512 kfree(auth_data); 2513 sdata->u.mgd.auth_data = NULL; 2514 } 2515 2516 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2517 bool assoc, bool abandon) 2518 { 2519 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2520 2521 sdata_assert_lock(sdata); 2522 2523 if (!assoc) { 2524 /* 2525 * we are not associated yet, the only timer that could be 2526 * running is the timeout for the association response which 2527 * which is not relevant anymore. 2528 */ 2529 del_timer_sync(&sdata->u.mgd.timer); 2530 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2531 2532 eth_zero_addr(sdata->u.mgd.bssid); 2533 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2534 sdata->u.mgd.flags = 0; 2535 sdata->vif.mu_mimo_owner = false; 2536 2537 mutex_lock(&sdata->local->mtx); 2538 ieee80211_vif_release_channel(sdata); 2539 mutex_unlock(&sdata->local->mtx); 2540 2541 if (abandon) 2542 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2543 } 2544 2545 kfree(assoc_data); 2546 sdata->u.mgd.assoc_data = NULL; 2547 } 2548 2549 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2550 struct ieee80211_mgmt *mgmt, size_t len) 2551 { 2552 struct ieee80211_local *local = sdata->local; 2553 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2554 u8 *pos; 2555 struct ieee802_11_elems elems; 2556 u32 tx_flags = 0; 2557 2558 pos = mgmt->u.auth.variable; 2559 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2560 if (!elems.challenge) 2561 return; 2562 auth_data->expected_transaction = 4; 2563 drv_mgd_prepare_tx(sdata->local, sdata); 2564 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2565 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2566 IEEE80211_TX_INTFL_MLME_CONN_TX; 2567 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2568 elems.challenge - 2, elems.challenge_len + 2, 2569 auth_data->bss->bssid, auth_data->bss->bssid, 2570 auth_data->key, auth_data->key_len, 2571 auth_data->key_idx, tx_flags); 2572 } 2573 2574 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2575 struct ieee80211_mgmt *mgmt, size_t len) 2576 { 2577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2578 u8 bssid[ETH_ALEN]; 2579 u16 auth_alg, auth_transaction, status_code; 2580 struct sta_info *sta; 2581 struct ieee80211_event event = { 2582 .type = MLME_EVENT, 2583 .u.mlme.data = AUTH_EVENT, 2584 }; 2585 2586 sdata_assert_lock(sdata); 2587 2588 if (len < 24 + 6) 2589 return; 2590 2591 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2592 return; 2593 2594 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2595 2596 if (!ether_addr_equal(bssid, mgmt->bssid)) 2597 return; 2598 2599 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2600 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2601 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2602 2603 if (auth_alg != ifmgd->auth_data->algorithm || 2604 auth_transaction != ifmgd->auth_data->expected_transaction) { 2605 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2606 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2607 auth_transaction, 2608 ifmgd->auth_data->expected_transaction); 2609 return; 2610 } 2611 2612 if (status_code != WLAN_STATUS_SUCCESS) { 2613 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2614 mgmt->sa, status_code); 2615 ieee80211_destroy_auth_data(sdata, false); 2616 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2617 event.u.mlme.status = MLME_DENIED; 2618 event.u.mlme.reason = status_code; 2619 drv_event_callback(sdata->local, sdata, &event); 2620 return; 2621 } 2622 2623 switch (ifmgd->auth_data->algorithm) { 2624 case WLAN_AUTH_OPEN: 2625 case WLAN_AUTH_LEAP: 2626 case WLAN_AUTH_FT: 2627 case WLAN_AUTH_SAE: 2628 case WLAN_AUTH_FILS_SK: 2629 case WLAN_AUTH_FILS_SK_PFS: 2630 case WLAN_AUTH_FILS_PK: 2631 break; 2632 case WLAN_AUTH_SHARED_KEY: 2633 if (ifmgd->auth_data->expected_transaction != 4) { 2634 ieee80211_auth_challenge(sdata, mgmt, len); 2635 /* need another frame */ 2636 return; 2637 } 2638 break; 2639 default: 2640 WARN_ONCE(1, "invalid auth alg %d", 2641 ifmgd->auth_data->algorithm); 2642 return; 2643 } 2644 2645 event.u.mlme.status = MLME_SUCCESS; 2646 drv_event_callback(sdata->local, sdata, &event); 2647 sdata_info(sdata, "authenticated\n"); 2648 ifmgd->auth_data->done = true; 2649 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2650 ifmgd->auth_data->timeout_started = true; 2651 run_again(sdata, ifmgd->auth_data->timeout); 2652 2653 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2654 ifmgd->auth_data->expected_transaction != 2) { 2655 /* 2656 * Report auth frame to user space for processing since another 2657 * round of Authentication frames is still needed. 2658 */ 2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2660 return; 2661 } 2662 2663 /* move station state to auth */ 2664 mutex_lock(&sdata->local->sta_mtx); 2665 sta = sta_info_get(sdata, bssid); 2666 if (!sta) { 2667 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2668 goto out_err; 2669 } 2670 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2671 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2672 goto out_err; 2673 } 2674 mutex_unlock(&sdata->local->sta_mtx); 2675 2676 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2677 return; 2678 out_err: 2679 mutex_unlock(&sdata->local->sta_mtx); 2680 /* ignore frame -- wait for timeout */ 2681 } 2682 2683 #define case_WLAN(type) \ 2684 case WLAN_REASON_##type: return #type 2685 2686 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2687 { 2688 switch (reason_code) { 2689 case_WLAN(UNSPECIFIED); 2690 case_WLAN(PREV_AUTH_NOT_VALID); 2691 case_WLAN(DEAUTH_LEAVING); 2692 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2693 case_WLAN(DISASSOC_AP_BUSY); 2694 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2695 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2696 case_WLAN(DISASSOC_STA_HAS_LEFT); 2697 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2698 case_WLAN(DISASSOC_BAD_POWER); 2699 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2700 case_WLAN(INVALID_IE); 2701 case_WLAN(MIC_FAILURE); 2702 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2703 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2704 case_WLAN(IE_DIFFERENT); 2705 case_WLAN(INVALID_GROUP_CIPHER); 2706 case_WLAN(INVALID_PAIRWISE_CIPHER); 2707 case_WLAN(INVALID_AKMP); 2708 case_WLAN(UNSUPP_RSN_VERSION); 2709 case_WLAN(INVALID_RSN_IE_CAP); 2710 case_WLAN(IEEE8021X_FAILED); 2711 case_WLAN(CIPHER_SUITE_REJECTED); 2712 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2713 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2714 case_WLAN(DISASSOC_LOW_ACK); 2715 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2716 case_WLAN(QSTA_LEAVE_QBSS); 2717 case_WLAN(QSTA_NOT_USE); 2718 case_WLAN(QSTA_REQUIRE_SETUP); 2719 case_WLAN(QSTA_TIMEOUT); 2720 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2721 case_WLAN(MESH_PEER_CANCELED); 2722 case_WLAN(MESH_MAX_PEERS); 2723 case_WLAN(MESH_CONFIG); 2724 case_WLAN(MESH_CLOSE); 2725 case_WLAN(MESH_MAX_RETRIES); 2726 case_WLAN(MESH_CONFIRM_TIMEOUT); 2727 case_WLAN(MESH_INVALID_GTK); 2728 case_WLAN(MESH_INCONSISTENT_PARAM); 2729 case_WLAN(MESH_INVALID_SECURITY); 2730 case_WLAN(MESH_PATH_ERROR); 2731 case_WLAN(MESH_PATH_NOFORWARD); 2732 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2733 case_WLAN(MAC_EXISTS_IN_MBSS); 2734 case_WLAN(MESH_CHAN_REGULATORY); 2735 case_WLAN(MESH_CHAN); 2736 default: return "<unknown>"; 2737 } 2738 } 2739 2740 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2741 struct ieee80211_mgmt *mgmt, size_t len) 2742 { 2743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2744 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2745 2746 sdata_assert_lock(sdata); 2747 2748 if (len < 24 + 2) 2749 return; 2750 2751 if (ifmgd->associated && 2752 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2753 const u8 *bssid = ifmgd->associated->bssid; 2754 2755 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2756 bssid, reason_code, 2757 ieee80211_get_reason_code_string(reason_code)); 2758 2759 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2760 2761 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2762 reason_code); 2763 return; 2764 } 2765 2766 if (ifmgd->assoc_data && 2767 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2768 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2769 2770 sdata_info(sdata, 2771 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2772 bssid, reason_code, 2773 ieee80211_get_reason_code_string(reason_code)); 2774 2775 ieee80211_destroy_assoc_data(sdata, false, true); 2776 2777 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2778 return; 2779 } 2780 } 2781 2782 2783 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2784 struct ieee80211_mgmt *mgmt, size_t len) 2785 { 2786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2787 u16 reason_code; 2788 2789 sdata_assert_lock(sdata); 2790 2791 if (len < 24 + 2) 2792 return; 2793 2794 if (!ifmgd->associated || 2795 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2796 return; 2797 2798 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2799 2800 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2801 mgmt->sa, reason_code, 2802 ieee80211_get_reason_code_string(reason_code)); 2803 2804 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2805 2806 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2807 } 2808 2809 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2810 u8 *supp_rates, unsigned int supp_rates_len, 2811 u32 *rates, u32 *basic_rates, 2812 bool *have_higher_than_11mbit, 2813 int *min_rate, int *min_rate_index, 2814 int shift) 2815 { 2816 int i, j; 2817 2818 for (i = 0; i < supp_rates_len; i++) { 2819 int rate = supp_rates[i] & 0x7f; 2820 bool is_basic = !!(supp_rates[i] & 0x80); 2821 2822 if ((rate * 5 * (1 << shift)) > 110) 2823 *have_higher_than_11mbit = true; 2824 2825 /* 2826 * Skip HT and VHT BSS membership selectors since they're not 2827 * rates. 2828 * 2829 * Note: Even though the membership selector and the basic 2830 * rate flag share the same bit, they are not exactly 2831 * the same. 2832 */ 2833 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 2834 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 2835 continue; 2836 2837 for (j = 0; j < sband->n_bitrates; j++) { 2838 struct ieee80211_rate *br; 2839 int brate; 2840 2841 br = &sband->bitrates[j]; 2842 2843 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2844 if (brate == rate) { 2845 *rates |= BIT(j); 2846 if (is_basic) 2847 *basic_rates |= BIT(j); 2848 if ((rate * 5) < *min_rate) { 2849 *min_rate = rate * 5; 2850 *min_rate_index = j; 2851 } 2852 break; 2853 } 2854 } 2855 } 2856 } 2857 2858 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2859 struct cfg80211_bss *cbss, 2860 struct ieee80211_mgmt *mgmt, size_t len) 2861 { 2862 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2863 struct ieee80211_local *local = sdata->local; 2864 struct ieee80211_supported_band *sband; 2865 struct sta_info *sta; 2866 u8 *pos; 2867 u16 capab_info, aid; 2868 struct ieee802_11_elems elems; 2869 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2870 const struct cfg80211_bss_ies *bss_ies = NULL; 2871 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2872 u32 changed = 0; 2873 int err; 2874 bool ret; 2875 2876 /* AssocResp and ReassocResp have identical structure */ 2877 2878 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2879 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2880 2881 /* 2882 * The 5 MSB of the AID field are reserved 2883 * (802.11-2016 9.4.1.8 AID field) 2884 */ 2885 aid &= 0x7ff; 2886 2887 ifmgd->broken_ap = false; 2888 2889 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2890 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2891 aid); 2892 aid = 0; 2893 ifmgd->broken_ap = true; 2894 } 2895 2896 pos = mgmt->u.assoc_resp.variable; 2897 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2898 2899 if (!elems.supp_rates) { 2900 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2901 return false; 2902 } 2903 2904 ifmgd->aid = aid; 2905 ifmgd->tdls_chan_switch_prohibited = 2906 elems.ext_capab && elems.ext_capab_len >= 5 && 2907 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2908 2909 /* 2910 * Some APs are erroneously not including some information in their 2911 * (re)association response frames. Try to recover by using the data 2912 * from the beacon or probe response. This seems to afflict mobile 2913 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2914 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2915 */ 2916 if ((assoc_data->wmm && !elems.wmm_param) || 2917 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2918 (!elems.ht_cap_elem || !elems.ht_operation)) || 2919 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2920 (!elems.vht_cap_elem || !elems.vht_operation))) { 2921 const struct cfg80211_bss_ies *ies; 2922 struct ieee802_11_elems bss_elems; 2923 2924 rcu_read_lock(); 2925 ies = rcu_dereference(cbss->ies); 2926 if (ies) 2927 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2928 GFP_ATOMIC); 2929 rcu_read_unlock(); 2930 if (!bss_ies) 2931 return false; 2932 2933 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2934 false, &bss_elems); 2935 if (assoc_data->wmm && 2936 !elems.wmm_param && bss_elems.wmm_param) { 2937 elems.wmm_param = bss_elems.wmm_param; 2938 sdata_info(sdata, 2939 "AP bug: WMM param missing from AssocResp\n"); 2940 } 2941 2942 /* 2943 * Also check if we requested HT/VHT, otherwise the AP doesn't 2944 * have to include the IEs in the (re)association response. 2945 */ 2946 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2947 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2948 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2949 sdata_info(sdata, 2950 "AP bug: HT capability missing from AssocResp\n"); 2951 } 2952 if (!elems.ht_operation && bss_elems.ht_operation && 2953 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2954 elems.ht_operation = bss_elems.ht_operation; 2955 sdata_info(sdata, 2956 "AP bug: HT operation missing from AssocResp\n"); 2957 } 2958 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2959 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2960 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2961 sdata_info(sdata, 2962 "AP bug: VHT capa missing from AssocResp\n"); 2963 } 2964 if (!elems.vht_operation && bss_elems.vht_operation && 2965 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2966 elems.vht_operation = bss_elems.vht_operation; 2967 sdata_info(sdata, 2968 "AP bug: VHT operation missing from AssocResp\n"); 2969 } 2970 } 2971 2972 /* 2973 * We previously checked these in the beacon/probe response, so 2974 * they should be present here. This is just a safety net. 2975 */ 2976 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2977 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2978 sdata_info(sdata, 2979 "HT AP is missing WMM params or HT capability/operation\n"); 2980 ret = false; 2981 goto out; 2982 } 2983 2984 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2985 (!elems.vht_cap_elem || !elems.vht_operation)) { 2986 sdata_info(sdata, 2987 "VHT AP is missing VHT capability/operation\n"); 2988 ret = false; 2989 goto out; 2990 } 2991 2992 mutex_lock(&sdata->local->sta_mtx); 2993 /* 2994 * station info was already allocated and inserted before 2995 * the association and should be available to us 2996 */ 2997 sta = sta_info_get(sdata, cbss->bssid); 2998 if (WARN_ON(!sta)) { 2999 mutex_unlock(&sdata->local->sta_mtx); 3000 ret = false; 3001 goto out; 3002 } 3003 3004 sband = ieee80211_get_sband(sdata); 3005 if (!sband) { 3006 mutex_unlock(&sdata->local->sta_mtx); 3007 ret = false; 3008 goto out; 3009 } 3010 3011 /* Set up internal HT/VHT capabilities */ 3012 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3013 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3014 elems.ht_cap_elem, sta); 3015 3016 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3017 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3018 elems.vht_cap_elem, sta); 3019 3020 /* 3021 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3022 * in their association response, so ignore that data for our own 3023 * configuration. If it changed since the last beacon, we'll get the 3024 * next beacon and update then. 3025 */ 3026 3027 /* 3028 * If an operating mode notification IE is present, override the 3029 * NSS calculation (that would be done in rate_control_rate_init()) 3030 * and use the # of streams from that element. 3031 */ 3032 if (elems.opmode_notif && 3033 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3034 u8 nss; 3035 3036 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3037 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3038 nss += 1; 3039 sta->sta.rx_nss = nss; 3040 } 3041 3042 rate_control_rate_init(sta); 3043 3044 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3045 set_sta_flag(sta, WLAN_STA_MFP); 3046 sta->sta.mfp = true; 3047 } else { 3048 sta->sta.mfp = false; 3049 } 3050 3051 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3052 3053 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3054 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3055 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3056 if (err) { 3057 sdata_info(sdata, 3058 "failed to move station %pM to desired state\n", 3059 sta->sta.addr); 3060 WARN_ON(__sta_info_destroy(sta)); 3061 mutex_unlock(&sdata->local->sta_mtx); 3062 ret = false; 3063 goto out; 3064 } 3065 3066 mutex_unlock(&sdata->local->sta_mtx); 3067 3068 /* 3069 * Always handle WMM once after association regardless 3070 * of the first value the AP uses. Setting -1 here has 3071 * that effect because the AP values is an unsigned 3072 * 4-bit value. 3073 */ 3074 ifmgd->wmm_last_param_set = -1; 3075 3076 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3077 ieee80211_set_wmm_default(sdata, false, false); 3078 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3079 elems.wmm_param_len)) { 3080 /* still enable QoS since we might have HT/VHT */ 3081 ieee80211_set_wmm_default(sdata, false, true); 3082 /* set the disable-WMM flag in this case to disable 3083 * tracking WMM parameter changes in the beacon if 3084 * the parameters weren't actually valid. Doing so 3085 * avoids changing parameters very strangely when 3086 * the AP is going back and forth between valid and 3087 * invalid parameters. 3088 */ 3089 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3090 } 3091 changed |= BSS_CHANGED_QOS; 3092 3093 if (elems.max_idle_period_ie) { 3094 bss_conf->max_idle_period = 3095 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3096 bss_conf->protected_keep_alive = 3097 !!(elems.max_idle_period_ie->idle_options & 3098 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3099 changed |= BSS_CHANGED_KEEP_ALIVE; 3100 } else { 3101 bss_conf->max_idle_period = 0; 3102 bss_conf->protected_keep_alive = false; 3103 } 3104 3105 /* set AID and assoc capability, 3106 * ieee80211_set_associated() will tell the driver */ 3107 bss_conf->aid = aid; 3108 bss_conf->assoc_capability = capab_info; 3109 ieee80211_set_associated(sdata, cbss, changed); 3110 3111 /* 3112 * If we're using 4-addr mode, let the AP know that we're 3113 * doing so, so that it can create the STA VLAN on its side 3114 */ 3115 if (ifmgd->use_4addr) 3116 ieee80211_send_4addr_nullfunc(local, sdata); 3117 3118 /* 3119 * Start timer to probe the connection to the AP now. 3120 * Also start the timer that will detect beacon loss. 3121 */ 3122 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3123 ieee80211_sta_reset_beacon_monitor(sdata); 3124 3125 ret = true; 3126 out: 3127 kfree(bss_ies); 3128 return ret; 3129 } 3130 3131 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3132 struct ieee80211_mgmt *mgmt, 3133 size_t len) 3134 { 3135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3136 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3137 u16 capab_info, status_code, aid; 3138 struct ieee802_11_elems elems; 3139 int ac, uapsd_queues = -1; 3140 u8 *pos; 3141 bool reassoc; 3142 struct cfg80211_bss *bss; 3143 struct ieee80211_event event = { 3144 .type = MLME_EVENT, 3145 .u.mlme.data = ASSOC_EVENT, 3146 }; 3147 3148 sdata_assert_lock(sdata); 3149 3150 if (!assoc_data) 3151 return; 3152 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3153 return; 3154 3155 /* 3156 * AssocResp and ReassocResp have identical structure, so process both 3157 * of them in this function. 3158 */ 3159 3160 if (len < 24 + 6) 3161 return; 3162 3163 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3164 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3165 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3166 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3167 3168 sdata_info(sdata, 3169 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3170 reassoc ? "Rea" : "A", mgmt->sa, 3171 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3172 3173 if (assoc_data->fils_kek_len && 3174 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3175 return; 3176 3177 pos = mgmt->u.assoc_resp.variable; 3178 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3179 3180 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3181 elems.timeout_int && 3182 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3183 u32 tu, ms; 3184 tu = le32_to_cpu(elems.timeout_int->value); 3185 ms = tu * 1024 / 1000; 3186 sdata_info(sdata, 3187 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3188 mgmt->sa, tu, ms); 3189 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3190 assoc_data->timeout_started = true; 3191 if (ms > IEEE80211_ASSOC_TIMEOUT) 3192 run_again(sdata, assoc_data->timeout); 3193 return; 3194 } 3195 3196 bss = assoc_data->bss; 3197 3198 if (status_code != WLAN_STATUS_SUCCESS) { 3199 sdata_info(sdata, "%pM denied association (code=%d)\n", 3200 mgmt->sa, status_code); 3201 ieee80211_destroy_assoc_data(sdata, false, false); 3202 event.u.mlme.status = MLME_DENIED; 3203 event.u.mlme.reason = status_code; 3204 drv_event_callback(sdata->local, sdata, &event); 3205 } else { 3206 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3207 /* oops -- internal error -- send timeout for now */ 3208 ieee80211_destroy_assoc_data(sdata, false, false); 3209 cfg80211_assoc_timeout(sdata->dev, bss); 3210 return; 3211 } 3212 event.u.mlme.status = MLME_SUCCESS; 3213 drv_event_callback(sdata->local, sdata, &event); 3214 sdata_info(sdata, "associated\n"); 3215 3216 /* 3217 * destroy assoc_data afterwards, as otherwise an idle 3218 * recalc after assoc_data is NULL but before associated 3219 * is set can cause the interface to go idle 3220 */ 3221 ieee80211_destroy_assoc_data(sdata, true, false); 3222 3223 /* get uapsd queues configuration */ 3224 uapsd_queues = 0; 3225 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3226 if (sdata->tx_conf[ac].uapsd) 3227 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3228 } 3229 3230 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3231 } 3232 3233 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3234 struct ieee80211_mgmt *mgmt, size_t len, 3235 struct ieee80211_rx_status *rx_status, 3236 struct ieee802_11_elems *elems) 3237 { 3238 struct ieee80211_local *local = sdata->local; 3239 struct ieee80211_bss *bss; 3240 struct ieee80211_channel *channel; 3241 3242 sdata_assert_lock(sdata); 3243 3244 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3245 if (!channel) 3246 return; 3247 3248 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3249 channel); 3250 if (bss) { 3251 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3252 ieee80211_rx_bss_put(local, bss); 3253 } 3254 } 3255 3256 3257 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3258 struct sk_buff *skb) 3259 { 3260 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3261 struct ieee80211_if_managed *ifmgd; 3262 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3263 size_t baselen, len = skb->len; 3264 struct ieee802_11_elems elems; 3265 3266 ifmgd = &sdata->u.mgd; 3267 3268 sdata_assert_lock(sdata); 3269 3270 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3271 return; /* ignore ProbeResp to foreign address */ 3272 3273 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3274 if (baselen > len) 3275 return; 3276 3277 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3278 false, &elems); 3279 3280 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3281 3282 if (ifmgd->associated && 3283 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3284 ieee80211_reset_ap_probe(sdata); 3285 } 3286 3287 /* 3288 * This is the canonical list of information elements we care about, 3289 * the filter code also gives us all changes to the Microsoft OUI 3290 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3291 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3292 * changes to requested client power. 3293 * 3294 * We implement beacon filtering in software since that means we can 3295 * avoid processing the frame here and in cfg80211, and userspace 3296 * will not be able to tell whether the hardware supports it or not. 3297 * 3298 * XXX: This list needs to be dynamic -- userspace needs to be able to 3299 * add items it requires. It also needs to be able to tell us to 3300 * look out for other vendor IEs. 3301 */ 3302 static const u64 care_about_ies = 3303 (1ULL << WLAN_EID_COUNTRY) | 3304 (1ULL << WLAN_EID_ERP_INFO) | 3305 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3306 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3307 (1ULL << WLAN_EID_HT_CAPABILITY) | 3308 (1ULL << WLAN_EID_HT_OPERATION) | 3309 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3310 3311 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3312 struct ieee80211_if_managed *ifmgd, 3313 struct ieee80211_bss_conf *bss_conf, 3314 struct ieee80211_local *local, 3315 struct ieee80211_rx_status *rx_status) 3316 { 3317 /* Track average RSSI from the Beacon frames of the current AP */ 3318 3319 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3320 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3321 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3322 ifmgd->last_cqm_event_signal = 0; 3323 ifmgd->count_beacon_signal = 1; 3324 ifmgd->last_ave_beacon_signal = 0; 3325 } else { 3326 ifmgd->count_beacon_signal++; 3327 } 3328 3329 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3330 3331 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3332 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3333 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3334 int last_sig = ifmgd->last_ave_beacon_signal; 3335 struct ieee80211_event event = { 3336 .type = RSSI_EVENT, 3337 }; 3338 3339 /* 3340 * if signal crosses either of the boundaries, invoke callback 3341 * with appropriate parameters 3342 */ 3343 if (sig > ifmgd->rssi_max_thold && 3344 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3345 ifmgd->last_ave_beacon_signal = sig; 3346 event.u.rssi.data = RSSI_EVENT_HIGH; 3347 drv_event_callback(local, sdata, &event); 3348 } else if (sig < ifmgd->rssi_min_thold && 3349 (last_sig >= ifmgd->rssi_max_thold || 3350 last_sig == 0)) { 3351 ifmgd->last_ave_beacon_signal = sig; 3352 event.u.rssi.data = RSSI_EVENT_LOW; 3353 drv_event_callback(local, sdata, &event); 3354 } 3355 } 3356 3357 if (bss_conf->cqm_rssi_thold && 3358 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3359 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3360 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3361 int last_event = ifmgd->last_cqm_event_signal; 3362 int thold = bss_conf->cqm_rssi_thold; 3363 int hyst = bss_conf->cqm_rssi_hyst; 3364 3365 if (sig < thold && 3366 (last_event == 0 || sig < last_event - hyst)) { 3367 ifmgd->last_cqm_event_signal = sig; 3368 ieee80211_cqm_rssi_notify( 3369 &sdata->vif, 3370 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3371 sig, GFP_KERNEL); 3372 } else if (sig > thold && 3373 (last_event == 0 || sig > last_event + hyst)) { 3374 ifmgd->last_cqm_event_signal = sig; 3375 ieee80211_cqm_rssi_notify( 3376 &sdata->vif, 3377 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3378 sig, GFP_KERNEL); 3379 } 3380 } 3381 3382 if (bss_conf->cqm_rssi_low && 3383 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3384 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3385 int last_event = ifmgd->last_cqm_event_signal; 3386 int low = bss_conf->cqm_rssi_low; 3387 int high = bss_conf->cqm_rssi_high; 3388 3389 if (sig < low && 3390 (last_event == 0 || last_event >= low)) { 3391 ifmgd->last_cqm_event_signal = sig; 3392 ieee80211_cqm_rssi_notify( 3393 &sdata->vif, 3394 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3395 sig, GFP_KERNEL); 3396 } else if (sig > high && 3397 (last_event == 0 || last_event <= high)) { 3398 ifmgd->last_cqm_event_signal = sig; 3399 ieee80211_cqm_rssi_notify( 3400 &sdata->vif, 3401 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3402 sig, GFP_KERNEL); 3403 } 3404 } 3405 } 3406 3407 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3408 struct ieee80211_mgmt *mgmt, size_t len, 3409 struct ieee80211_rx_status *rx_status) 3410 { 3411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3412 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3413 size_t baselen; 3414 struct ieee802_11_elems elems; 3415 struct ieee80211_local *local = sdata->local; 3416 struct ieee80211_chanctx_conf *chanctx_conf; 3417 struct ieee80211_channel *chan; 3418 struct sta_info *sta; 3419 u32 changed = 0; 3420 bool erp_valid; 3421 u8 erp_value = 0; 3422 u32 ncrc; 3423 u8 *bssid; 3424 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3425 3426 sdata_assert_lock(sdata); 3427 3428 /* Process beacon from the current BSS */ 3429 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3430 if (baselen > len) 3431 return; 3432 3433 rcu_read_lock(); 3434 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3435 if (!chanctx_conf) { 3436 rcu_read_unlock(); 3437 return; 3438 } 3439 3440 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3441 rcu_read_unlock(); 3442 return; 3443 } 3444 chan = chanctx_conf->def.chan; 3445 rcu_read_unlock(); 3446 3447 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3448 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3449 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3450 len - baselen, false, &elems); 3451 3452 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3453 if (elems.tim && !elems.parse_error) { 3454 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3455 ifmgd->dtim_period = tim_ie->dtim_period; 3456 } 3457 ifmgd->have_beacon = true; 3458 ifmgd->assoc_data->need_beacon = false; 3459 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3460 sdata->vif.bss_conf.sync_tsf = 3461 le64_to_cpu(mgmt->u.beacon.timestamp); 3462 sdata->vif.bss_conf.sync_device_ts = 3463 rx_status->device_timestamp; 3464 if (elems.tim) 3465 sdata->vif.bss_conf.sync_dtim_count = 3466 elems.tim->dtim_count; 3467 else 3468 sdata->vif.bss_conf.sync_dtim_count = 0; 3469 } 3470 /* continue assoc process */ 3471 ifmgd->assoc_data->timeout = jiffies; 3472 ifmgd->assoc_data->timeout_started = true; 3473 run_again(sdata, ifmgd->assoc_data->timeout); 3474 return; 3475 } 3476 3477 if (!ifmgd->associated || 3478 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3479 return; 3480 bssid = ifmgd->associated->bssid; 3481 3482 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3483 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3484 local, rx_status); 3485 3486 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3487 mlme_dbg_ratelimited(sdata, 3488 "cancelling AP probe due to a received beacon\n"); 3489 ieee80211_reset_ap_probe(sdata); 3490 } 3491 3492 /* 3493 * Push the beacon loss detection into the future since 3494 * we are processing a beacon from the AP just now. 3495 */ 3496 ieee80211_sta_reset_beacon_monitor(sdata); 3497 3498 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3499 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3500 len - baselen, false, &elems, 3501 care_about_ies, ncrc); 3502 3503 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3504 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3505 if (local->hw.conf.dynamic_ps_timeout > 0) { 3506 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3507 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3508 ieee80211_hw_config(local, 3509 IEEE80211_CONF_CHANGE_PS); 3510 } 3511 ieee80211_send_nullfunc(local, sdata, false); 3512 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3513 local->pspolling = true; 3514 3515 /* 3516 * Here is assumed that the driver will be 3517 * able to send ps-poll frame and receive a 3518 * response even though power save mode is 3519 * enabled, but some drivers might require 3520 * to disable power save here. This needs 3521 * to be investigated. 3522 */ 3523 ieee80211_send_pspoll(local, sdata); 3524 } 3525 } 3526 3527 if (sdata->vif.p2p || 3528 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3529 struct ieee80211_p2p_noa_attr noa = {}; 3530 int ret; 3531 3532 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3533 len - baselen, 3534 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3535 (u8 *) &noa, sizeof(noa)); 3536 if (ret >= 2) { 3537 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3538 /* valid noa_attr and index changed */ 3539 sdata->u.mgd.p2p_noa_index = noa.index; 3540 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3541 changed |= BSS_CHANGED_P2P_PS; 3542 /* 3543 * make sure we update all information, the CRC 3544 * mechanism doesn't look at P2P attributes. 3545 */ 3546 ifmgd->beacon_crc_valid = false; 3547 } 3548 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3549 /* noa_attr not found and we had valid noa_attr before */ 3550 sdata->u.mgd.p2p_noa_index = -1; 3551 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3552 changed |= BSS_CHANGED_P2P_PS; 3553 ifmgd->beacon_crc_valid = false; 3554 } 3555 } 3556 3557 if (ifmgd->csa_waiting_bcn) 3558 ieee80211_chswitch_post_beacon(sdata); 3559 3560 /* 3561 * Update beacon timing and dtim count on every beacon appearance. This 3562 * will allow the driver to use the most updated values. Do it before 3563 * comparing this one with last received beacon. 3564 * IMPORTANT: These parameters would possibly be out of sync by the time 3565 * the driver will use them. The synchronized view is currently 3566 * guaranteed only in certain callbacks. 3567 */ 3568 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3569 sdata->vif.bss_conf.sync_tsf = 3570 le64_to_cpu(mgmt->u.beacon.timestamp); 3571 sdata->vif.bss_conf.sync_device_ts = 3572 rx_status->device_timestamp; 3573 if (elems.tim) 3574 sdata->vif.bss_conf.sync_dtim_count = 3575 elems.tim->dtim_count; 3576 else 3577 sdata->vif.bss_conf.sync_dtim_count = 0; 3578 } 3579 3580 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3581 return; 3582 ifmgd->beacon_crc = ncrc; 3583 ifmgd->beacon_crc_valid = true; 3584 3585 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3586 3587 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3588 rx_status->device_timestamp, 3589 &elems, true); 3590 3591 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3592 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3593 elems.wmm_param_len)) 3594 changed |= BSS_CHANGED_QOS; 3595 3596 /* 3597 * If we haven't had a beacon before, tell the driver about the 3598 * DTIM period (and beacon timing if desired) now. 3599 */ 3600 if (!ifmgd->have_beacon) { 3601 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3602 if (elems.tim) 3603 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3604 else 3605 bss_conf->dtim_period = 1; 3606 3607 changed |= BSS_CHANGED_BEACON_INFO; 3608 ifmgd->have_beacon = true; 3609 3610 mutex_lock(&local->iflist_mtx); 3611 ieee80211_recalc_ps(local); 3612 mutex_unlock(&local->iflist_mtx); 3613 3614 ieee80211_recalc_ps_vif(sdata); 3615 } 3616 3617 if (elems.erp_info) { 3618 erp_valid = true; 3619 erp_value = elems.erp_info[0]; 3620 } else { 3621 erp_valid = false; 3622 } 3623 changed |= ieee80211_handle_bss_capability(sdata, 3624 le16_to_cpu(mgmt->u.beacon.capab_info), 3625 erp_valid, erp_value); 3626 3627 mutex_lock(&local->sta_mtx); 3628 sta = sta_info_get(sdata, bssid); 3629 3630 if (ieee80211_config_bw(sdata, sta, 3631 elems.ht_cap_elem, elems.ht_operation, 3632 elems.vht_operation, bssid, &changed)) { 3633 mutex_unlock(&local->sta_mtx); 3634 sdata_info(sdata, 3635 "failed to follow AP %pM bandwidth change, disconnect\n", 3636 bssid); 3637 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3638 WLAN_REASON_DEAUTH_LEAVING, 3639 true, deauth_buf); 3640 ieee80211_report_disconnect(sdata, deauth_buf, 3641 sizeof(deauth_buf), true, 3642 WLAN_REASON_DEAUTH_LEAVING); 3643 return; 3644 } 3645 3646 if (sta && elems.opmode_notif) 3647 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3648 rx_status->band); 3649 mutex_unlock(&local->sta_mtx); 3650 3651 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3652 elems.country_elem, 3653 elems.country_elem_len, 3654 elems.pwr_constr_elem, 3655 elems.cisco_dtpc_elem); 3656 3657 ieee80211_bss_info_change_notify(sdata, changed); 3658 } 3659 3660 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3661 struct sk_buff *skb) 3662 { 3663 struct ieee80211_rx_status *rx_status; 3664 struct ieee80211_mgmt *mgmt; 3665 u16 fc; 3666 struct ieee802_11_elems elems; 3667 int ies_len; 3668 3669 rx_status = (struct ieee80211_rx_status *) skb->cb; 3670 mgmt = (struct ieee80211_mgmt *) skb->data; 3671 fc = le16_to_cpu(mgmt->frame_control); 3672 3673 sdata_lock(sdata); 3674 3675 switch (fc & IEEE80211_FCTL_STYPE) { 3676 case IEEE80211_STYPE_BEACON: 3677 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3678 break; 3679 case IEEE80211_STYPE_PROBE_RESP: 3680 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3681 break; 3682 case IEEE80211_STYPE_AUTH: 3683 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3684 break; 3685 case IEEE80211_STYPE_DEAUTH: 3686 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3687 break; 3688 case IEEE80211_STYPE_DISASSOC: 3689 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3690 break; 3691 case IEEE80211_STYPE_ASSOC_RESP: 3692 case IEEE80211_STYPE_REASSOC_RESP: 3693 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3694 break; 3695 case IEEE80211_STYPE_ACTION: 3696 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3697 ies_len = skb->len - 3698 offsetof(struct ieee80211_mgmt, 3699 u.action.u.chan_switch.variable); 3700 3701 if (ies_len < 0) 3702 break; 3703 3704 ieee802_11_parse_elems( 3705 mgmt->u.action.u.chan_switch.variable, 3706 ies_len, true, &elems); 3707 3708 if (elems.parse_error) 3709 break; 3710 3711 ieee80211_sta_process_chanswitch(sdata, 3712 rx_status->mactime, 3713 rx_status->device_timestamp, 3714 &elems, false); 3715 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3716 ies_len = skb->len - 3717 offsetof(struct ieee80211_mgmt, 3718 u.action.u.ext_chan_switch.variable); 3719 3720 if (ies_len < 0) 3721 break; 3722 3723 ieee802_11_parse_elems( 3724 mgmt->u.action.u.ext_chan_switch.variable, 3725 ies_len, true, &elems); 3726 3727 if (elems.parse_error) 3728 break; 3729 3730 /* for the handling code pretend this was also an IE */ 3731 elems.ext_chansw_ie = 3732 &mgmt->u.action.u.ext_chan_switch.data; 3733 3734 ieee80211_sta_process_chanswitch(sdata, 3735 rx_status->mactime, 3736 rx_status->device_timestamp, 3737 &elems, false); 3738 } 3739 break; 3740 } 3741 sdata_unlock(sdata); 3742 } 3743 3744 static void ieee80211_sta_timer(struct timer_list *t) 3745 { 3746 struct ieee80211_sub_if_data *sdata = 3747 from_timer(sdata, t, u.mgd.timer); 3748 3749 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3750 } 3751 3752 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3753 u8 *bssid, u8 reason, bool tx) 3754 { 3755 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3756 3757 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3758 tx, frame_buf); 3759 3760 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3761 reason); 3762 } 3763 3764 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3765 { 3766 struct ieee80211_local *local = sdata->local; 3767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3768 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3769 u32 tx_flags = 0; 3770 u16 trans = 1; 3771 u16 status = 0; 3772 3773 sdata_assert_lock(sdata); 3774 3775 if (WARN_ON_ONCE(!auth_data)) 3776 return -EINVAL; 3777 3778 auth_data->tries++; 3779 3780 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3781 sdata_info(sdata, "authentication with %pM timed out\n", 3782 auth_data->bss->bssid); 3783 3784 /* 3785 * Most likely AP is not in the range so remove the 3786 * bss struct for that AP. 3787 */ 3788 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3789 3790 return -ETIMEDOUT; 3791 } 3792 3793 drv_mgd_prepare_tx(local, sdata); 3794 3795 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3796 auth_data->bss->bssid, auth_data->tries, 3797 IEEE80211_AUTH_MAX_TRIES); 3798 3799 auth_data->expected_transaction = 2; 3800 3801 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3802 trans = auth_data->sae_trans; 3803 status = auth_data->sae_status; 3804 auth_data->expected_transaction = trans; 3805 } 3806 3807 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3808 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3809 IEEE80211_TX_INTFL_MLME_CONN_TX; 3810 3811 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3812 auth_data->data, auth_data->data_len, 3813 auth_data->bss->bssid, 3814 auth_data->bss->bssid, NULL, 0, 0, 3815 tx_flags); 3816 3817 if (tx_flags == 0) { 3818 if (auth_data->algorithm == WLAN_AUTH_SAE) 3819 auth_data->timeout = jiffies + 3820 IEEE80211_AUTH_TIMEOUT_SAE; 3821 else 3822 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3823 } else { 3824 auth_data->timeout = 3825 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3826 } 3827 3828 auth_data->timeout_started = true; 3829 run_again(sdata, auth_data->timeout); 3830 3831 return 0; 3832 } 3833 3834 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3835 { 3836 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3837 struct ieee80211_local *local = sdata->local; 3838 3839 sdata_assert_lock(sdata); 3840 3841 assoc_data->tries++; 3842 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3843 sdata_info(sdata, "association with %pM timed out\n", 3844 assoc_data->bss->bssid); 3845 3846 /* 3847 * Most likely AP is not in the range so remove the 3848 * bss struct for that AP. 3849 */ 3850 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3851 3852 return -ETIMEDOUT; 3853 } 3854 3855 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3856 assoc_data->bss->bssid, assoc_data->tries, 3857 IEEE80211_ASSOC_MAX_TRIES); 3858 ieee80211_send_assoc(sdata); 3859 3860 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3861 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3862 assoc_data->timeout_started = true; 3863 run_again(sdata, assoc_data->timeout); 3864 } else { 3865 assoc_data->timeout = 3866 round_jiffies_up(jiffies + 3867 IEEE80211_ASSOC_TIMEOUT_LONG); 3868 assoc_data->timeout_started = true; 3869 run_again(sdata, assoc_data->timeout); 3870 } 3871 3872 return 0; 3873 } 3874 3875 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3876 __le16 fc, bool acked) 3877 { 3878 struct ieee80211_local *local = sdata->local; 3879 3880 sdata->u.mgd.status_fc = fc; 3881 sdata->u.mgd.status_acked = acked; 3882 sdata->u.mgd.status_received = true; 3883 3884 ieee80211_queue_work(&local->hw, &sdata->work); 3885 } 3886 3887 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3888 { 3889 struct ieee80211_local *local = sdata->local; 3890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3891 3892 sdata_lock(sdata); 3893 3894 if (ifmgd->status_received) { 3895 __le16 fc = ifmgd->status_fc; 3896 bool status_acked = ifmgd->status_acked; 3897 3898 ifmgd->status_received = false; 3899 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 3900 if (status_acked) { 3901 if (ifmgd->auth_data->algorithm == 3902 WLAN_AUTH_SAE) 3903 ifmgd->auth_data->timeout = 3904 jiffies + 3905 IEEE80211_AUTH_TIMEOUT_SAE; 3906 else 3907 ifmgd->auth_data->timeout = 3908 jiffies + 3909 IEEE80211_AUTH_TIMEOUT_SHORT; 3910 run_again(sdata, ifmgd->auth_data->timeout); 3911 } else { 3912 ifmgd->auth_data->timeout = jiffies - 1; 3913 } 3914 ifmgd->auth_data->timeout_started = true; 3915 } else if (ifmgd->assoc_data && 3916 (ieee80211_is_assoc_req(fc) || 3917 ieee80211_is_reassoc_req(fc))) { 3918 if (status_acked) { 3919 ifmgd->assoc_data->timeout = 3920 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3921 run_again(sdata, ifmgd->assoc_data->timeout); 3922 } else { 3923 ifmgd->assoc_data->timeout = jiffies - 1; 3924 } 3925 ifmgd->assoc_data->timeout_started = true; 3926 } 3927 } 3928 3929 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3930 time_after(jiffies, ifmgd->auth_data->timeout)) { 3931 if (ifmgd->auth_data->done) { 3932 /* 3933 * ok ... we waited for assoc but userspace didn't, 3934 * so let's just kill the auth data 3935 */ 3936 ieee80211_destroy_auth_data(sdata, false); 3937 } else if (ieee80211_auth(sdata)) { 3938 u8 bssid[ETH_ALEN]; 3939 struct ieee80211_event event = { 3940 .type = MLME_EVENT, 3941 .u.mlme.data = AUTH_EVENT, 3942 .u.mlme.status = MLME_TIMEOUT, 3943 }; 3944 3945 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3946 3947 ieee80211_destroy_auth_data(sdata, false); 3948 3949 cfg80211_auth_timeout(sdata->dev, bssid); 3950 drv_event_callback(sdata->local, sdata, &event); 3951 } 3952 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3953 run_again(sdata, ifmgd->auth_data->timeout); 3954 3955 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3956 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3957 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3958 ieee80211_do_assoc(sdata)) { 3959 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3960 struct ieee80211_event event = { 3961 .type = MLME_EVENT, 3962 .u.mlme.data = ASSOC_EVENT, 3963 .u.mlme.status = MLME_TIMEOUT, 3964 }; 3965 3966 ieee80211_destroy_assoc_data(sdata, false, false); 3967 cfg80211_assoc_timeout(sdata->dev, bss); 3968 drv_event_callback(sdata->local, sdata, &event); 3969 } 3970 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3971 run_again(sdata, ifmgd->assoc_data->timeout); 3972 3973 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3974 ifmgd->associated) { 3975 u8 bssid[ETH_ALEN]; 3976 int max_tries; 3977 3978 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3979 3980 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3981 max_tries = max_nullfunc_tries; 3982 else 3983 max_tries = max_probe_tries; 3984 3985 /* ACK received for nullfunc probing frame */ 3986 if (!ifmgd->probe_send_count) 3987 ieee80211_reset_ap_probe(sdata); 3988 else if (ifmgd->nullfunc_failed) { 3989 if (ifmgd->probe_send_count < max_tries) { 3990 mlme_dbg(sdata, 3991 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3992 bssid, ifmgd->probe_send_count, 3993 max_tries); 3994 ieee80211_mgd_probe_ap_send(sdata); 3995 } else { 3996 mlme_dbg(sdata, 3997 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3998 bssid); 3999 ieee80211_sta_connection_lost(sdata, bssid, 4000 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4001 false); 4002 } 4003 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4004 run_again(sdata, ifmgd->probe_timeout); 4005 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4006 mlme_dbg(sdata, 4007 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4008 bssid, probe_wait_ms); 4009 ieee80211_sta_connection_lost(sdata, bssid, 4010 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4011 } else if (ifmgd->probe_send_count < max_tries) { 4012 mlme_dbg(sdata, 4013 "No probe response from AP %pM after %dms, try %d/%i\n", 4014 bssid, probe_wait_ms, 4015 ifmgd->probe_send_count, max_tries); 4016 ieee80211_mgd_probe_ap_send(sdata); 4017 } else { 4018 /* 4019 * We actually lost the connection ... or did we? 4020 * Let's make sure! 4021 */ 4022 mlme_dbg(sdata, 4023 "No probe response from AP %pM after %dms, disconnecting.\n", 4024 bssid, probe_wait_ms); 4025 4026 ieee80211_sta_connection_lost(sdata, bssid, 4027 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4028 } 4029 } 4030 4031 sdata_unlock(sdata); 4032 } 4033 4034 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4035 { 4036 struct ieee80211_sub_if_data *sdata = 4037 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4039 4040 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4041 return; 4042 4043 sdata->u.mgd.connection_loss = false; 4044 ieee80211_queue_work(&sdata->local->hw, 4045 &sdata->u.mgd.beacon_connection_loss_work); 4046 } 4047 4048 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4049 { 4050 struct ieee80211_sub_if_data *sdata = 4051 from_timer(sdata, t, u.mgd.conn_mon_timer); 4052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4053 struct ieee80211_local *local = sdata->local; 4054 4055 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4056 return; 4057 4058 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4059 } 4060 4061 static void ieee80211_sta_monitor_work(struct work_struct *work) 4062 { 4063 struct ieee80211_sub_if_data *sdata = 4064 container_of(work, struct ieee80211_sub_if_data, 4065 u.mgd.monitor_work); 4066 4067 ieee80211_mgd_probe_ap(sdata, false); 4068 } 4069 4070 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4071 { 4072 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4073 __ieee80211_stop_poll(sdata); 4074 4075 /* let's probe the connection once */ 4076 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4077 ieee80211_queue_work(&sdata->local->hw, 4078 &sdata->u.mgd.monitor_work); 4079 } 4080 } 4081 4082 #ifdef CONFIG_PM 4083 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4084 { 4085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4086 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4087 4088 sdata_lock(sdata); 4089 4090 if (ifmgd->auth_data || ifmgd->assoc_data) { 4091 const u8 *bssid = ifmgd->auth_data ? 4092 ifmgd->auth_data->bss->bssid : 4093 ifmgd->assoc_data->bss->bssid; 4094 4095 /* 4096 * If we are trying to authenticate / associate while suspending, 4097 * cfg80211 won't know and won't actually abort those attempts, 4098 * thus we need to do that ourselves. 4099 */ 4100 ieee80211_send_deauth_disassoc(sdata, bssid, 4101 IEEE80211_STYPE_DEAUTH, 4102 WLAN_REASON_DEAUTH_LEAVING, 4103 false, frame_buf); 4104 if (ifmgd->assoc_data) 4105 ieee80211_destroy_assoc_data(sdata, false, true); 4106 if (ifmgd->auth_data) 4107 ieee80211_destroy_auth_data(sdata, false); 4108 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4109 IEEE80211_DEAUTH_FRAME_LEN); 4110 } 4111 4112 /* This is a bit of a hack - we should find a better and more generic 4113 * solution to this. Normally when suspending, cfg80211 will in fact 4114 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4115 * auth (not so important) or assoc (this is the problem) process. 4116 * 4117 * As a consequence, it can happen that we are in the process of both 4118 * associating and suspending, and receive an association response 4119 * after cfg80211 has checked if it needs to disconnect, but before 4120 * we actually set the flag to drop incoming frames. This will then 4121 * cause the workqueue flush to process the association response in 4122 * the suspend, resulting in a successful association just before it 4123 * tries to remove the interface from the driver, which now though 4124 * has a channel context assigned ... this results in issues. 4125 * 4126 * To work around this (for now) simply deauth here again if we're 4127 * now connected. 4128 */ 4129 if (ifmgd->associated && !sdata->local->wowlan) { 4130 u8 bssid[ETH_ALEN]; 4131 struct cfg80211_deauth_request req = { 4132 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4133 .bssid = bssid, 4134 }; 4135 4136 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4137 ieee80211_mgd_deauth(sdata, &req); 4138 } 4139 4140 sdata_unlock(sdata); 4141 } 4142 4143 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4144 { 4145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4146 4147 sdata_lock(sdata); 4148 if (!ifmgd->associated) { 4149 sdata_unlock(sdata); 4150 return; 4151 } 4152 4153 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4154 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4155 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4156 ieee80211_sta_connection_lost(sdata, 4157 ifmgd->associated->bssid, 4158 WLAN_REASON_UNSPECIFIED, 4159 true); 4160 sdata_unlock(sdata); 4161 return; 4162 } 4163 sdata_unlock(sdata); 4164 } 4165 #endif 4166 4167 /* interface setup */ 4168 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4169 { 4170 struct ieee80211_if_managed *ifmgd; 4171 4172 ifmgd = &sdata->u.mgd; 4173 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4174 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4175 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4176 ieee80211_beacon_connection_loss_work); 4177 INIT_WORK(&ifmgd->csa_connection_drop_work, 4178 ieee80211_csa_connection_drop_work); 4179 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4180 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4181 ieee80211_tdls_peer_del_work); 4182 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4183 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4184 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4185 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4186 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4187 ieee80211_sta_handle_tspec_ac_params_wk); 4188 4189 ifmgd->flags = 0; 4190 ifmgd->powersave = sdata->wdev.ps; 4191 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4192 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4193 ifmgd->p2p_noa_index = -1; 4194 4195 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4196 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4197 else 4198 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4199 4200 /* Setup TDLS data */ 4201 spin_lock_init(&ifmgd->teardown_lock); 4202 ifmgd->teardown_skb = NULL; 4203 ifmgd->orig_teardown_skb = NULL; 4204 } 4205 4206 /* scan finished notification */ 4207 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4208 { 4209 struct ieee80211_sub_if_data *sdata; 4210 4211 /* Restart STA timers */ 4212 rcu_read_lock(); 4213 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4214 if (ieee80211_sdata_running(sdata)) 4215 ieee80211_restart_sta_timer(sdata); 4216 } 4217 rcu_read_unlock(); 4218 } 4219 4220 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4221 struct cfg80211_bss *cbss) 4222 { 4223 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4224 const u8 *ht_cap_ie, *vht_cap_ie; 4225 const struct ieee80211_ht_cap *ht_cap; 4226 const struct ieee80211_vht_cap *vht_cap; 4227 u8 chains = 1; 4228 4229 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4230 return chains; 4231 4232 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4233 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4234 ht_cap = (void *)(ht_cap_ie + 2); 4235 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4236 /* 4237 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4238 * "Tx Unequal Modulation Supported" fields. 4239 */ 4240 } 4241 4242 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4243 return chains; 4244 4245 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4246 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4247 u8 nss; 4248 u16 tx_mcs_map; 4249 4250 vht_cap = (void *)(vht_cap_ie + 2); 4251 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4252 for (nss = 8; nss > 0; nss--) { 4253 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4254 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4255 break; 4256 } 4257 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4258 chains = max(chains, nss); 4259 } 4260 4261 return chains; 4262 } 4263 4264 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4265 struct cfg80211_bss *cbss) 4266 { 4267 struct ieee80211_local *local = sdata->local; 4268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4269 const struct ieee80211_ht_cap *ht_cap = NULL; 4270 const struct ieee80211_ht_operation *ht_oper = NULL; 4271 const struct ieee80211_vht_operation *vht_oper = NULL; 4272 struct ieee80211_supported_band *sband; 4273 struct cfg80211_chan_def chandef; 4274 int ret; 4275 u32 i; 4276 bool have_80mhz; 4277 4278 sband = local->hw.wiphy->bands[cbss->channel->band]; 4279 4280 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4281 IEEE80211_STA_DISABLE_80P80MHZ | 4282 IEEE80211_STA_DISABLE_160MHZ); 4283 4284 rcu_read_lock(); 4285 4286 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4287 sband->ht_cap.ht_supported) { 4288 const u8 *ht_oper_ie, *ht_cap_ie; 4289 4290 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4291 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4292 ht_oper = (void *)(ht_oper_ie + 2); 4293 4294 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4295 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4296 ht_cap = (void *)(ht_cap_ie + 2); 4297 4298 if (!ht_cap) { 4299 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4300 ht_oper = NULL; 4301 } 4302 } 4303 4304 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4305 sband->vht_cap.vht_supported) { 4306 const u8 *vht_oper_ie, *vht_cap; 4307 4308 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4309 WLAN_EID_VHT_OPERATION); 4310 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4311 vht_oper = (void *)(vht_oper_ie + 2); 4312 if (vht_oper && !ht_oper) { 4313 vht_oper = NULL; 4314 sdata_info(sdata, 4315 "AP advertised VHT without HT, disabling both\n"); 4316 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4317 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4318 } 4319 4320 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4321 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4322 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4323 vht_oper = NULL; 4324 } 4325 } 4326 4327 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4328 have_80mhz = false; 4329 for (i = 0; i < sband->n_channels; i++) { 4330 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4331 IEEE80211_CHAN_NO_80MHZ)) 4332 continue; 4333 4334 have_80mhz = true; 4335 break; 4336 } 4337 4338 if (!have_80mhz) 4339 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4340 4341 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4342 cbss->channel, 4343 ht_oper, vht_oper, 4344 &chandef, false); 4345 4346 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4347 local->rx_chains); 4348 4349 rcu_read_unlock(); 4350 4351 /* will change later if needed */ 4352 sdata->smps_mode = IEEE80211_SMPS_OFF; 4353 4354 mutex_lock(&local->mtx); 4355 /* 4356 * If this fails (possibly due to channel context sharing 4357 * on incompatible channels, e.g. 80+80 and 160 sharing the 4358 * same control channel) try to use a smaller bandwidth. 4359 */ 4360 ret = ieee80211_vif_use_channel(sdata, &chandef, 4361 IEEE80211_CHANCTX_SHARED); 4362 4363 /* don't downgrade for 5 and 10 MHz channels, though. */ 4364 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4365 chandef.width == NL80211_CHAN_WIDTH_10) 4366 goto out; 4367 4368 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4369 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4370 ret = ieee80211_vif_use_channel(sdata, &chandef, 4371 IEEE80211_CHANCTX_SHARED); 4372 } 4373 out: 4374 mutex_unlock(&local->mtx); 4375 return ret; 4376 } 4377 4378 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4379 struct cfg80211_bss *cbss, bool assoc, 4380 bool override) 4381 { 4382 struct ieee80211_local *local = sdata->local; 4383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4384 struct ieee80211_bss *bss = (void *)cbss->priv; 4385 struct sta_info *new_sta = NULL; 4386 struct ieee80211_supported_band *sband; 4387 bool have_sta = false; 4388 int err; 4389 4390 sband = local->hw.wiphy->bands[cbss->channel->band]; 4391 4392 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4393 return -EINVAL; 4394 4395 /* If a reconfig is happening, bail out */ 4396 if (local->in_reconfig) 4397 return -EBUSY; 4398 4399 if (assoc) { 4400 rcu_read_lock(); 4401 have_sta = sta_info_get(sdata, cbss->bssid); 4402 rcu_read_unlock(); 4403 } 4404 4405 if (!have_sta) { 4406 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4407 if (!new_sta) 4408 return -ENOMEM; 4409 } 4410 4411 /* 4412 * Set up the information for the new channel before setting the 4413 * new channel. We can't - completely race-free - change the basic 4414 * rates bitmap and the channel (sband) that it refers to, but if 4415 * we set it up before we at least avoid calling into the driver's 4416 * bss_info_changed() method with invalid information (since we do 4417 * call that from changing the channel - only for IDLE and perhaps 4418 * some others, but ...). 4419 * 4420 * So to avoid that, just set up all the new information before the 4421 * channel, but tell the driver to apply it only afterwards, since 4422 * it might need the new channel for that. 4423 */ 4424 if (new_sta) { 4425 u32 rates = 0, basic_rates = 0; 4426 bool have_higher_than_11mbit; 4427 int min_rate = INT_MAX, min_rate_index = -1; 4428 const struct cfg80211_bss_ies *ies; 4429 int shift = ieee80211_vif_get_shift(&sdata->vif); 4430 4431 ieee80211_get_rates(sband, bss->supp_rates, 4432 bss->supp_rates_len, 4433 &rates, &basic_rates, 4434 &have_higher_than_11mbit, 4435 &min_rate, &min_rate_index, 4436 shift); 4437 4438 /* 4439 * This used to be a workaround for basic rates missing 4440 * in the association response frame. Now that we no 4441 * longer use the basic rates from there, it probably 4442 * doesn't happen any more, but keep the workaround so 4443 * in case some *other* APs are buggy in different ways 4444 * we can connect -- with a warning. 4445 */ 4446 if (!basic_rates && min_rate_index >= 0) { 4447 sdata_info(sdata, 4448 "No basic rates, using min rate instead\n"); 4449 basic_rates = BIT(min_rate_index); 4450 } 4451 4452 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4453 sdata->vif.bss_conf.basic_rates = basic_rates; 4454 4455 /* cf. IEEE 802.11 9.2.12 */ 4456 if (cbss->channel->band == NL80211_BAND_2GHZ && 4457 have_higher_than_11mbit) 4458 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4459 else 4460 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4461 4462 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4463 4464 /* set timing information */ 4465 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4466 rcu_read_lock(); 4467 ies = rcu_dereference(cbss->beacon_ies); 4468 if (ies) { 4469 const u8 *tim_ie; 4470 4471 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4472 sdata->vif.bss_conf.sync_device_ts = 4473 bss->device_ts_beacon; 4474 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4475 ies->data, ies->len); 4476 if (tim_ie && tim_ie[1] >= 2) 4477 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4478 else 4479 sdata->vif.bss_conf.sync_dtim_count = 0; 4480 } else if (!ieee80211_hw_check(&sdata->local->hw, 4481 TIMING_BEACON_ONLY)) { 4482 ies = rcu_dereference(cbss->proberesp_ies); 4483 /* must be non-NULL since beacon IEs were NULL */ 4484 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4485 sdata->vif.bss_conf.sync_device_ts = 4486 bss->device_ts_presp; 4487 sdata->vif.bss_conf.sync_dtim_count = 0; 4488 } else { 4489 sdata->vif.bss_conf.sync_tsf = 0; 4490 sdata->vif.bss_conf.sync_device_ts = 0; 4491 sdata->vif.bss_conf.sync_dtim_count = 0; 4492 } 4493 rcu_read_unlock(); 4494 } 4495 4496 if (new_sta || override) { 4497 err = ieee80211_prep_channel(sdata, cbss); 4498 if (err) { 4499 if (new_sta) 4500 sta_info_free(local, new_sta); 4501 return -EINVAL; 4502 } 4503 } 4504 4505 if (new_sta) { 4506 /* 4507 * tell driver about BSSID, basic rates and timing 4508 * this was set up above, before setting the channel 4509 */ 4510 ieee80211_bss_info_change_notify(sdata, 4511 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4512 BSS_CHANGED_BEACON_INT); 4513 4514 if (assoc) 4515 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4516 4517 err = sta_info_insert(new_sta); 4518 new_sta = NULL; 4519 if (err) { 4520 sdata_info(sdata, 4521 "failed to insert STA entry for the AP (error %d)\n", 4522 err); 4523 return err; 4524 } 4525 } else 4526 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4527 4528 /* Cancel scan to ensure that nothing interferes with connection */ 4529 if (local->scanning) 4530 ieee80211_scan_cancel(local); 4531 4532 return 0; 4533 } 4534 4535 /* config hooks */ 4536 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4537 struct cfg80211_auth_request *req) 4538 { 4539 struct ieee80211_local *local = sdata->local; 4540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4541 struct ieee80211_mgd_auth_data *auth_data; 4542 u16 auth_alg; 4543 int err; 4544 4545 /* prepare auth data structure */ 4546 4547 switch (req->auth_type) { 4548 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4549 auth_alg = WLAN_AUTH_OPEN; 4550 break; 4551 case NL80211_AUTHTYPE_SHARED_KEY: 4552 if (IS_ERR(local->wep_tx_tfm)) 4553 return -EOPNOTSUPP; 4554 auth_alg = WLAN_AUTH_SHARED_KEY; 4555 break; 4556 case NL80211_AUTHTYPE_FT: 4557 auth_alg = WLAN_AUTH_FT; 4558 break; 4559 case NL80211_AUTHTYPE_NETWORK_EAP: 4560 auth_alg = WLAN_AUTH_LEAP; 4561 break; 4562 case NL80211_AUTHTYPE_SAE: 4563 auth_alg = WLAN_AUTH_SAE; 4564 break; 4565 case NL80211_AUTHTYPE_FILS_SK: 4566 auth_alg = WLAN_AUTH_FILS_SK; 4567 break; 4568 case NL80211_AUTHTYPE_FILS_SK_PFS: 4569 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4570 break; 4571 case NL80211_AUTHTYPE_FILS_PK: 4572 auth_alg = WLAN_AUTH_FILS_PK; 4573 break; 4574 default: 4575 return -EOPNOTSUPP; 4576 } 4577 4578 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4579 req->ie_len, GFP_KERNEL); 4580 if (!auth_data) 4581 return -ENOMEM; 4582 4583 auth_data->bss = req->bss; 4584 4585 if (req->auth_data_len >= 4) { 4586 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4587 __le16 *pos = (__le16 *) req->auth_data; 4588 4589 auth_data->sae_trans = le16_to_cpu(pos[0]); 4590 auth_data->sae_status = le16_to_cpu(pos[1]); 4591 } 4592 memcpy(auth_data->data, req->auth_data + 4, 4593 req->auth_data_len - 4); 4594 auth_data->data_len += req->auth_data_len - 4; 4595 } 4596 4597 if (req->ie && req->ie_len) { 4598 memcpy(&auth_data->data[auth_data->data_len], 4599 req->ie, req->ie_len); 4600 auth_data->data_len += req->ie_len; 4601 } 4602 4603 if (req->key && req->key_len) { 4604 auth_data->key_len = req->key_len; 4605 auth_data->key_idx = req->key_idx; 4606 memcpy(auth_data->key, req->key, req->key_len); 4607 } 4608 4609 auth_data->algorithm = auth_alg; 4610 4611 /* try to authenticate/probe */ 4612 4613 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4614 ifmgd->assoc_data) { 4615 err = -EBUSY; 4616 goto err_free; 4617 } 4618 4619 if (ifmgd->auth_data) 4620 ieee80211_destroy_auth_data(sdata, false); 4621 4622 /* prep auth_data so we don't go into idle on disassoc */ 4623 ifmgd->auth_data = auth_data; 4624 4625 if (ifmgd->associated) { 4626 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4627 4628 sdata_info(sdata, 4629 "disconnect from AP %pM for new auth to %pM\n", 4630 ifmgd->associated->bssid, req->bss->bssid); 4631 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4632 WLAN_REASON_UNSPECIFIED, 4633 false, frame_buf); 4634 4635 ieee80211_report_disconnect(sdata, frame_buf, 4636 sizeof(frame_buf), true, 4637 WLAN_REASON_UNSPECIFIED); 4638 } 4639 4640 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4641 4642 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4643 if (err) 4644 goto err_clear; 4645 4646 err = ieee80211_auth(sdata); 4647 if (err) { 4648 sta_info_destroy_addr(sdata, req->bss->bssid); 4649 goto err_clear; 4650 } 4651 4652 /* hold our own reference */ 4653 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4654 return 0; 4655 4656 err_clear: 4657 eth_zero_addr(ifmgd->bssid); 4658 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4659 ifmgd->auth_data = NULL; 4660 mutex_lock(&sdata->local->mtx); 4661 ieee80211_vif_release_channel(sdata); 4662 mutex_unlock(&sdata->local->mtx); 4663 err_free: 4664 kfree(auth_data); 4665 return err; 4666 } 4667 4668 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4669 struct cfg80211_assoc_request *req) 4670 { 4671 struct ieee80211_local *local = sdata->local; 4672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4673 struct ieee80211_bss *bss = (void *)req->bss->priv; 4674 struct ieee80211_mgd_assoc_data *assoc_data; 4675 const struct cfg80211_bss_ies *beacon_ies; 4676 struct ieee80211_supported_band *sband; 4677 const u8 *ssidie, *ht_ie, *vht_ie; 4678 int i, err; 4679 bool override = false; 4680 4681 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4682 if (!assoc_data) 4683 return -ENOMEM; 4684 4685 rcu_read_lock(); 4686 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4687 if (!ssidie) { 4688 rcu_read_unlock(); 4689 kfree(assoc_data); 4690 return -EINVAL; 4691 } 4692 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4693 assoc_data->ssid_len = ssidie[1]; 4694 rcu_read_unlock(); 4695 4696 if (ifmgd->associated) { 4697 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4698 4699 sdata_info(sdata, 4700 "disconnect from AP %pM for new assoc to %pM\n", 4701 ifmgd->associated->bssid, req->bss->bssid); 4702 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4703 WLAN_REASON_UNSPECIFIED, 4704 false, frame_buf); 4705 4706 ieee80211_report_disconnect(sdata, frame_buf, 4707 sizeof(frame_buf), true, 4708 WLAN_REASON_UNSPECIFIED); 4709 } 4710 4711 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4712 err = -EBUSY; 4713 goto err_free; 4714 } 4715 4716 if (ifmgd->assoc_data) { 4717 err = -EBUSY; 4718 goto err_free; 4719 } 4720 4721 if (ifmgd->auth_data) { 4722 bool match; 4723 4724 /* keep sta info, bssid if matching */ 4725 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4726 ieee80211_destroy_auth_data(sdata, match); 4727 } 4728 4729 /* prepare assoc data */ 4730 4731 ifmgd->beacon_crc_valid = false; 4732 4733 assoc_data->wmm = bss->wmm_used && 4734 (local->hw.queues >= IEEE80211_NUM_ACS); 4735 4736 /* 4737 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4738 * We still associate in non-HT mode (11a/b/g) if any one of these 4739 * ciphers is configured as pairwise. 4740 * We can set this to true for non-11n hardware, that'll be checked 4741 * separately along with the peer capabilities. 4742 */ 4743 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4744 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4745 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4746 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4747 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4748 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4749 netdev_info(sdata->dev, 4750 "disabling HT/VHT due to WEP/TKIP use\n"); 4751 } 4752 } 4753 4754 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4755 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4756 if (!sband->ht_cap.ht_supported || 4757 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4758 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4759 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4760 if (!bss->wmm_used && 4761 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4762 netdev_info(sdata->dev, 4763 "disabling HT as WMM/QoS is not supported by the AP\n"); 4764 } 4765 4766 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4767 if (!sband->vht_cap.vht_supported || 4768 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4769 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4770 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4771 if (!bss->wmm_used && 4772 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4773 netdev_info(sdata->dev, 4774 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4775 } 4776 4777 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4778 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4779 sizeof(ifmgd->ht_capa_mask)); 4780 4781 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4782 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4783 sizeof(ifmgd->vht_capa_mask)); 4784 4785 if (req->ie && req->ie_len) { 4786 memcpy(assoc_data->ie, req->ie, req->ie_len); 4787 assoc_data->ie_len = req->ie_len; 4788 } 4789 4790 if (req->fils_kek) { 4791 /* should already be checked in cfg80211 - so warn */ 4792 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 4793 err = -EINVAL; 4794 goto err_free; 4795 } 4796 memcpy(assoc_data->fils_kek, req->fils_kek, 4797 req->fils_kek_len); 4798 assoc_data->fils_kek_len = req->fils_kek_len; 4799 } 4800 4801 if (req->fils_nonces) 4802 memcpy(assoc_data->fils_nonces, req->fils_nonces, 4803 2 * FILS_NONCE_LEN); 4804 4805 assoc_data->bss = req->bss; 4806 4807 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4808 if (ifmgd->powersave) 4809 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4810 else 4811 sdata->smps_mode = IEEE80211_SMPS_OFF; 4812 } else 4813 sdata->smps_mode = ifmgd->req_smps; 4814 4815 assoc_data->capability = req->bss->capability; 4816 assoc_data->supp_rates = bss->supp_rates; 4817 assoc_data->supp_rates_len = bss->supp_rates_len; 4818 4819 rcu_read_lock(); 4820 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4821 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4822 assoc_data->ap_ht_param = 4823 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4824 else 4825 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4826 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4827 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4828 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4829 sizeof(struct ieee80211_vht_cap)); 4830 else 4831 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4832 rcu_read_unlock(); 4833 4834 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4835 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4836 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4837 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4838 4839 if (bss->wmm_used && bss->uapsd_supported && 4840 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4841 assoc_data->uapsd = true; 4842 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4843 } else { 4844 assoc_data->uapsd = false; 4845 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4846 } 4847 4848 if (req->prev_bssid) 4849 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4850 4851 if (req->use_mfp) { 4852 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4853 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4854 } else { 4855 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4856 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4857 } 4858 4859 if (req->flags & ASSOC_REQ_USE_RRM) 4860 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4861 else 4862 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4863 4864 if (req->crypto.control_port) 4865 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4866 else 4867 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4868 4869 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4870 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4871 sdata->control_port_over_nl80211 = 4872 req->crypto.control_port_over_nl80211; 4873 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4874 sdata->vif.type); 4875 4876 /* kick off associate process */ 4877 4878 ifmgd->assoc_data = assoc_data; 4879 ifmgd->dtim_period = 0; 4880 ifmgd->have_beacon = false; 4881 4882 /* override HT/VHT configuration only if the AP and we support it */ 4883 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4884 struct ieee80211_sta_ht_cap sta_ht_cap; 4885 4886 if (req->flags & ASSOC_REQ_DISABLE_HT) 4887 override = true; 4888 4889 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4890 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4891 4892 /* check for 40 MHz disable override */ 4893 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4894 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4895 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4896 override = true; 4897 4898 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4899 req->flags & ASSOC_REQ_DISABLE_VHT) 4900 override = true; 4901 } 4902 4903 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4904 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4905 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4906 } 4907 4908 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4909 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4910 4911 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4912 if (err) 4913 goto err_clear; 4914 4915 rcu_read_lock(); 4916 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4917 4918 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4919 !beacon_ies) { 4920 /* 4921 * Wait up to one beacon interval ... 4922 * should this be more if we miss one? 4923 */ 4924 sdata_info(sdata, "waiting for beacon from %pM\n", 4925 ifmgd->bssid); 4926 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4927 assoc_data->timeout_started = true; 4928 assoc_data->need_beacon = true; 4929 } else if (beacon_ies) { 4930 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4931 beacon_ies->data, 4932 beacon_ies->len); 4933 u8 dtim_count = 0; 4934 4935 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4936 const struct ieee80211_tim_ie *tim; 4937 tim = (void *)(tim_ie + 2); 4938 ifmgd->dtim_period = tim->dtim_period; 4939 dtim_count = tim->dtim_count; 4940 } 4941 ifmgd->have_beacon = true; 4942 assoc_data->timeout = jiffies; 4943 assoc_data->timeout_started = true; 4944 4945 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4946 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4947 sdata->vif.bss_conf.sync_device_ts = 4948 bss->device_ts_beacon; 4949 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4950 } 4951 } else { 4952 assoc_data->timeout = jiffies; 4953 assoc_data->timeout_started = true; 4954 } 4955 rcu_read_unlock(); 4956 4957 run_again(sdata, assoc_data->timeout); 4958 4959 if (bss->corrupt_data) { 4960 char *corrupt_type = "data"; 4961 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4962 if (bss->corrupt_data & 4963 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4964 corrupt_type = "beacon and probe response"; 4965 else 4966 corrupt_type = "beacon"; 4967 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4968 corrupt_type = "probe response"; 4969 sdata_info(sdata, "associating with AP with corrupt %s\n", 4970 corrupt_type); 4971 } 4972 4973 return 0; 4974 err_clear: 4975 eth_zero_addr(ifmgd->bssid); 4976 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4977 ifmgd->assoc_data = NULL; 4978 err_free: 4979 kfree(assoc_data); 4980 return err; 4981 } 4982 4983 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4984 struct cfg80211_deauth_request *req) 4985 { 4986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4987 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4988 bool tx = !req->local_state_change; 4989 4990 if (ifmgd->auth_data && 4991 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4992 sdata_info(sdata, 4993 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4994 req->bssid, req->reason_code, 4995 ieee80211_get_reason_code_string(req->reason_code)); 4996 4997 drv_mgd_prepare_tx(sdata->local, sdata); 4998 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4999 IEEE80211_STYPE_DEAUTH, 5000 req->reason_code, tx, 5001 frame_buf); 5002 ieee80211_destroy_auth_data(sdata, false); 5003 ieee80211_report_disconnect(sdata, frame_buf, 5004 sizeof(frame_buf), true, 5005 req->reason_code); 5006 5007 return 0; 5008 } 5009 5010 if (ifmgd->assoc_data && 5011 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5012 sdata_info(sdata, 5013 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5014 req->bssid, req->reason_code, 5015 ieee80211_get_reason_code_string(req->reason_code)); 5016 5017 drv_mgd_prepare_tx(sdata->local, sdata); 5018 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5019 IEEE80211_STYPE_DEAUTH, 5020 req->reason_code, tx, 5021 frame_buf); 5022 ieee80211_destroy_assoc_data(sdata, false, true); 5023 ieee80211_report_disconnect(sdata, frame_buf, 5024 sizeof(frame_buf), true, 5025 req->reason_code); 5026 return 0; 5027 } 5028 5029 if (ifmgd->associated && 5030 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5031 sdata_info(sdata, 5032 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5033 req->bssid, req->reason_code, 5034 ieee80211_get_reason_code_string(req->reason_code)); 5035 5036 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5037 req->reason_code, tx, frame_buf); 5038 ieee80211_report_disconnect(sdata, frame_buf, 5039 sizeof(frame_buf), true, 5040 req->reason_code); 5041 return 0; 5042 } 5043 5044 return -ENOTCONN; 5045 } 5046 5047 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5048 struct cfg80211_disassoc_request *req) 5049 { 5050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5051 u8 bssid[ETH_ALEN]; 5052 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5053 5054 /* 5055 * cfg80211 should catch this ... but it's racy since 5056 * we can receive a disassoc frame, process it, hand it 5057 * to cfg80211 while that's in a locked section already 5058 * trying to tell us that the user wants to disconnect. 5059 */ 5060 if (ifmgd->associated != req->bss) 5061 return -ENOLINK; 5062 5063 sdata_info(sdata, 5064 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5065 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5066 5067 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5068 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5069 req->reason_code, !req->local_state_change, 5070 frame_buf); 5071 5072 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5073 req->reason_code); 5074 5075 return 0; 5076 } 5077 5078 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5079 { 5080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5081 5082 /* 5083 * Make sure some work items will not run after this, 5084 * they will not do anything but might not have been 5085 * cancelled when disconnecting. 5086 */ 5087 cancel_work_sync(&ifmgd->monitor_work); 5088 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5089 cancel_work_sync(&ifmgd->request_smps_work); 5090 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5091 cancel_work_sync(&ifmgd->chswitch_work); 5092 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5093 5094 sdata_lock(sdata); 5095 if (ifmgd->assoc_data) { 5096 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5097 ieee80211_destroy_assoc_data(sdata, false, false); 5098 cfg80211_assoc_timeout(sdata->dev, bss); 5099 } 5100 if (ifmgd->auth_data) 5101 ieee80211_destroy_auth_data(sdata, false); 5102 spin_lock_bh(&ifmgd->teardown_lock); 5103 if (ifmgd->teardown_skb) { 5104 kfree_skb(ifmgd->teardown_skb); 5105 ifmgd->teardown_skb = NULL; 5106 ifmgd->orig_teardown_skb = NULL; 5107 } 5108 spin_unlock_bh(&ifmgd->teardown_lock); 5109 del_timer_sync(&ifmgd->timer); 5110 sdata_unlock(sdata); 5111 } 5112 5113 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5114 enum nl80211_cqm_rssi_threshold_event rssi_event, 5115 s32 rssi_level, 5116 gfp_t gfp) 5117 { 5118 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5119 5120 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5121 5122 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5123 } 5124 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5125 5126 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5127 { 5128 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5129 5130 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5131 5132 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5133 } 5134 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5135