1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2019 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 const struct ieee80211_ht_operation *ht_oper, 149 const struct ieee80211_vht_operation *vht_oper, 150 const struct ieee80211_he_operation *he_oper, 151 struct cfg80211_chan_def *chandef, bool tracking) 152 { 153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 154 struct cfg80211_chan_def vht_chandef; 155 struct ieee80211_sta_ht_cap sta_ht_cap; 156 u32 ht_cfreq, ret; 157 158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 160 161 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 162 chandef->chan = channel; 163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 164 chandef->center_freq1 = channel->center_freq; 165 166 if (!ht_oper || !sta_ht_cap.ht_supported) { 167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 168 goto out; 169 } 170 171 chandef->width = NL80211_CHAN_WIDTH_20; 172 173 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 174 channel->band); 175 /* check that channel matches the right operating channel */ 176 if (!tracking && channel->center_freq != ht_cfreq) { 177 /* 178 * It's possible that some APs are confused here; 179 * Netgear WNDR3700 sometimes reports 4 higher than 180 * the actual channel in association responses, but 181 * since we look at probe response/beacon data here 182 * it should be OK. 183 */ 184 sdata_info(sdata, 185 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 186 channel->center_freq, ht_cfreq, 187 ht_oper->primary_chan, channel->band); 188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 189 goto out; 190 } 191 192 /* check 40 MHz support, if we have it */ 193 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 194 ieee80211_chandef_ht_oper(ht_oper, chandef); 195 } else { 196 /* 40 MHz (and 80 MHz) must be supported for VHT */ 197 ret = IEEE80211_STA_DISABLE_VHT; 198 /* also mark 40 MHz disabled */ 199 ret |= IEEE80211_STA_DISABLE_40MHZ; 200 goto out; 201 } 202 203 if (!vht_oper || !sband->vht_cap.vht_supported) { 204 ret = IEEE80211_STA_DISABLE_VHT; 205 goto out; 206 } 207 208 vht_chandef = *chandef; 209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 210 (le32_to_cpu(he_oper->he_oper_params) & 211 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 212 struct ieee80211_vht_operation he_oper_vht_cap; 213 214 /* 215 * Set only first 3 bytes (other 2 aren't used in 216 * ieee80211_chandef_vht_oper() anyway) 217 */ 218 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 219 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 220 221 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 222 &he_oper_vht_cap, ht_oper, 223 &vht_chandef)) { 224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 225 sdata_info(sdata, 226 "HE AP VHT information is invalid, disable HE\n"); 227 ret = IEEE80211_STA_DISABLE_HE; 228 goto out; 229 } 230 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper, 231 ht_oper, &vht_chandef)) { 232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 233 sdata_info(sdata, 234 "AP VHT information is invalid, disable VHT\n"); 235 ret = IEEE80211_STA_DISABLE_VHT; 236 goto out; 237 } 238 239 if (!cfg80211_chandef_valid(&vht_chandef)) { 240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 241 sdata_info(sdata, 242 "AP VHT information is invalid, disable VHT\n"); 243 ret = IEEE80211_STA_DISABLE_VHT; 244 goto out; 245 } 246 247 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 248 ret = 0; 249 goto out; 250 } 251 252 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 253 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 254 sdata_info(sdata, 255 "AP VHT information doesn't match HT, disable VHT\n"); 256 ret = IEEE80211_STA_DISABLE_VHT; 257 goto out; 258 } 259 260 *chandef = vht_chandef; 261 262 ret = 0; 263 264 out: 265 /* 266 * When tracking the current AP, don't do any further checks if the 267 * new chandef is identical to the one we're currently using for the 268 * connection. This keeps us from playing ping-pong with regulatory, 269 * without it the following can happen (for example): 270 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 271 * - AP advertises regdom US 272 * - CRDA loads regdom US with 80 MHz prohibited (old database) 273 * - the code below detects an unsupported channel, downgrades, and 274 * we disconnect from the AP in the caller 275 * - disconnect causes CRDA to reload world regdomain and the game 276 * starts anew. 277 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 278 * 279 * It seems possible that there are still scenarios with CSA or real 280 * bandwidth changes where a this could happen, but those cases are 281 * less common and wouldn't completely prevent using the AP. 282 */ 283 if (tracking && 284 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 285 return ret; 286 287 /* don't print the message below for VHT mismatch if VHT is disabled */ 288 if (ret & IEEE80211_STA_DISABLE_VHT) 289 vht_chandef = *chandef; 290 291 /* 292 * Ignore the DISABLED flag when we're already connected and only 293 * tracking the APs beacon for bandwidth changes - otherwise we 294 * might get disconnected here if we connect to an AP, update our 295 * regulatory information based on the AP's country IE and the 296 * information we have is wrong/outdated and disables the channel 297 * that we're actually using for the connection to the AP. 298 */ 299 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 300 tracking ? 0 : 301 IEEE80211_CHAN_DISABLED)) { 302 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 303 ret = IEEE80211_STA_DISABLE_HT | 304 IEEE80211_STA_DISABLE_VHT; 305 break; 306 } 307 308 ret |= ieee80211_chandef_downgrade(chandef); 309 } 310 311 if (chandef->width != vht_chandef.width && !tracking) 312 sdata_info(sdata, 313 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 314 315 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 316 return ret; 317 } 318 319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 320 struct sta_info *sta, 321 const struct ieee80211_ht_cap *ht_cap, 322 const struct ieee80211_ht_operation *ht_oper, 323 const struct ieee80211_vht_operation *vht_oper, 324 const struct ieee80211_he_operation *he_oper, 325 const u8 *bssid, u32 *changed) 326 { 327 struct ieee80211_local *local = sdata->local; 328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 329 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 330 struct ieee80211_supported_band *sband = 331 local->hw.wiphy->bands[chan->band]; 332 struct cfg80211_chan_def chandef; 333 u16 ht_opmode; 334 u32 flags; 335 enum ieee80211_sta_rx_bandwidth new_sta_bw; 336 int ret; 337 338 /* if HT was/is disabled, don't track any bandwidth changes */ 339 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 340 return 0; 341 342 /* don't check VHT if we associated as non-VHT station */ 343 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 344 vht_oper = NULL; 345 346 /* don't check HE if we associated as non-HE station */ 347 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 348 !ieee80211_get_he_sta_cap(sband)) 349 he_oper = NULL; 350 351 if (WARN_ON_ONCE(!sta)) 352 return -EINVAL; 353 354 /* 355 * if bss configuration changed store the new one - 356 * this may be applicable even if channel is identical 357 */ 358 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 359 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 360 *changed |= BSS_CHANGED_HT; 361 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 362 } 363 364 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 365 flags = ieee80211_determine_chantype(sdata, sband, chan, 366 ht_oper, vht_oper, he_oper, 367 &chandef, true); 368 369 /* 370 * Downgrade the new channel if we associated with restricted 371 * capabilities. For example, if we associated as a 20 MHz STA 372 * to a 40 MHz AP (due to regulatory, capabilities or config 373 * reasons) then switching to a 40 MHz channel now won't do us 374 * any good -- we couldn't use it with the AP. 375 */ 376 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 377 chandef.width == NL80211_CHAN_WIDTH_80P80) 378 flags |= ieee80211_chandef_downgrade(&chandef); 379 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 380 chandef.width == NL80211_CHAN_WIDTH_160) 381 flags |= ieee80211_chandef_downgrade(&chandef); 382 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 383 chandef.width > NL80211_CHAN_WIDTH_20) 384 flags |= ieee80211_chandef_downgrade(&chandef); 385 386 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 387 return 0; 388 389 sdata_info(sdata, 390 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 391 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 392 chandef.center_freq1, chandef.center_freq2); 393 394 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 395 IEEE80211_STA_DISABLE_VHT | 396 IEEE80211_STA_DISABLE_40MHZ | 397 IEEE80211_STA_DISABLE_80P80MHZ | 398 IEEE80211_STA_DISABLE_160MHZ)) || 399 !cfg80211_chandef_valid(&chandef)) { 400 sdata_info(sdata, 401 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 402 ifmgd->bssid); 403 return -EINVAL; 404 } 405 406 switch (chandef.width) { 407 case NL80211_CHAN_WIDTH_20_NOHT: 408 case NL80211_CHAN_WIDTH_20: 409 new_sta_bw = IEEE80211_STA_RX_BW_20; 410 break; 411 case NL80211_CHAN_WIDTH_40: 412 new_sta_bw = IEEE80211_STA_RX_BW_40; 413 break; 414 case NL80211_CHAN_WIDTH_80: 415 new_sta_bw = IEEE80211_STA_RX_BW_80; 416 break; 417 case NL80211_CHAN_WIDTH_80P80: 418 case NL80211_CHAN_WIDTH_160: 419 new_sta_bw = IEEE80211_STA_RX_BW_160; 420 break; 421 default: 422 return -EINVAL; 423 } 424 425 if (new_sta_bw > sta->cur_max_bandwidth) 426 new_sta_bw = sta->cur_max_bandwidth; 427 428 if (new_sta_bw < sta->sta.bandwidth) { 429 sta->sta.bandwidth = new_sta_bw; 430 rate_control_rate_update(local, sband, sta, 431 IEEE80211_RC_BW_CHANGED); 432 } 433 434 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 435 if (ret) { 436 sdata_info(sdata, 437 "AP %pM changed bandwidth to incompatible one - disconnect\n", 438 ifmgd->bssid); 439 return ret; 440 } 441 442 if (new_sta_bw > sta->sta.bandwidth) { 443 sta->sta.bandwidth = new_sta_bw; 444 rate_control_rate_update(local, sband, sta, 445 IEEE80211_RC_BW_CHANGED); 446 } 447 448 return 0; 449 } 450 451 /* frame sending functions */ 452 453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 454 struct sk_buff *skb, u8 ap_ht_param, 455 struct ieee80211_supported_band *sband, 456 struct ieee80211_channel *channel, 457 enum ieee80211_smps_mode smps) 458 { 459 u8 *pos; 460 u32 flags = channel->flags; 461 u16 cap; 462 struct ieee80211_sta_ht_cap ht_cap; 463 464 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 465 466 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 467 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 468 469 /* determine capability flags */ 470 cap = ht_cap.cap; 471 472 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 473 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 474 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 475 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 476 cap &= ~IEEE80211_HT_CAP_SGI_40; 477 } 478 break; 479 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 480 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 481 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 482 cap &= ~IEEE80211_HT_CAP_SGI_40; 483 } 484 break; 485 } 486 487 /* 488 * If 40 MHz was disabled associate as though we weren't 489 * capable of 40 MHz -- some broken APs will never fall 490 * back to trying to transmit in 20 MHz. 491 */ 492 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 494 cap &= ~IEEE80211_HT_CAP_SGI_40; 495 } 496 497 /* set SM PS mode properly */ 498 cap &= ~IEEE80211_HT_CAP_SM_PS; 499 switch (smps) { 500 case IEEE80211_SMPS_AUTOMATIC: 501 case IEEE80211_SMPS_NUM_MODES: 502 WARN_ON(1); 503 /* fall through */ 504 case IEEE80211_SMPS_OFF: 505 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 506 IEEE80211_HT_CAP_SM_PS_SHIFT; 507 break; 508 case IEEE80211_SMPS_STATIC: 509 cap |= WLAN_HT_CAP_SM_PS_STATIC << 510 IEEE80211_HT_CAP_SM_PS_SHIFT; 511 break; 512 case IEEE80211_SMPS_DYNAMIC: 513 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 514 IEEE80211_HT_CAP_SM_PS_SHIFT; 515 break; 516 } 517 518 /* reserve and fill IE */ 519 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 520 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 521 } 522 523 /* This function determines vht capability flags for the association 524 * and builds the IE. 525 * Note - the function may set the owner of the MU-MIMO capability 526 */ 527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 528 struct sk_buff *skb, 529 struct ieee80211_supported_band *sband, 530 struct ieee80211_vht_cap *ap_vht_cap) 531 { 532 struct ieee80211_local *local = sdata->local; 533 u8 *pos; 534 u32 cap; 535 struct ieee80211_sta_vht_cap vht_cap; 536 u32 mask, ap_bf_sts, our_bf_sts; 537 538 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 539 540 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 541 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 542 543 /* determine capability flags */ 544 cap = vht_cap.cap; 545 546 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 547 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 548 549 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 550 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 551 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 552 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 553 } 554 555 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 556 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 557 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 558 } 559 560 /* 561 * Some APs apparently get confused if our capabilities are better 562 * than theirs, so restrict what we advertise in the assoc request. 563 */ 564 if (!(ap_vht_cap->vht_cap_info & 565 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 566 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 567 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 568 else if (!(ap_vht_cap->vht_cap_info & 569 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 571 572 /* 573 * If some other vif is using the MU-MIMO capablity we cannot associate 574 * using MU-MIMO - this will lead to contradictions in the group-id 575 * mechanism. 576 * Ownership is defined since association request, in order to avoid 577 * simultaneous associations with MU-MIMO. 578 */ 579 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 580 bool disable_mu_mimo = false; 581 struct ieee80211_sub_if_data *other; 582 583 list_for_each_entry_rcu(other, &local->interfaces, list) { 584 if (other->vif.mu_mimo_owner) { 585 disable_mu_mimo = true; 586 break; 587 } 588 } 589 if (disable_mu_mimo) 590 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 591 else 592 sdata->vif.mu_mimo_owner = true; 593 } 594 595 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 596 597 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 598 our_bf_sts = cap & mask; 599 600 if (ap_bf_sts < our_bf_sts) { 601 cap &= ~mask; 602 cap |= ap_bf_sts; 603 } 604 605 /* reserve and fill IE */ 606 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 607 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 608 } 609 610 /* This function determines HE capability flags for the association 611 * and builds the IE. 612 */ 613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 614 struct sk_buff *skb, 615 struct ieee80211_supported_band *sband) 616 { 617 u8 *pos; 618 const struct ieee80211_sta_he_cap *he_cap = NULL; 619 u8 he_cap_size; 620 621 he_cap = ieee80211_get_he_sta_cap(sband); 622 if (!he_cap) 623 return; 624 625 /* 626 * TODO: the 1 added is because this temporarily is under the EXTENSION 627 * IE. Get rid of it when it moves. 628 */ 629 he_cap_size = 630 2 + 1 + sizeof(he_cap->he_cap_elem) + 631 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 632 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 633 he_cap->he_cap_elem.phy_cap_info); 634 pos = skb_put(skb, he_cap_size); 635 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 636 } 637 638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 639 { 640 struct ieee80211_local *local = sdata->local; 641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 642 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 643 struct sk_buff *skb; 644 struct ieee80211_mgmt *mgmt; 645 u8 *pos, qos_info, *ie_start; 646 size_t offset = 0, noffset; 647 int i, count, rates_len, supp_rates_len, shift; 648 u16 capab; 649 struct ieee80211_supported_band *sband; 650 struct ieee80211_chanctx_conf *chanctx_conf; 651 struct ieee80211_channel *chan; 652 u32 rates = 0; 653 654 sdata_assert_lock(sdata); 655 656 rcu_read_lock(); 657 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 658 if (WARN_ON(!chanctx_conf)) { 659 rcu_read_unlock(); 660 return; 661 } 662 chan = chanctx_conf->def.chan; 663 rcu_read_unlock(); 664 sband = local->hw.wiphy->bands[chan->band]; 665 shift = ieee80211_vif_get_shift(&sdata->vif); 666 667 if (assoc_data->supp_rates_len) { 668 /* 669 * Get all rates supported by the device and the AP as 670 * some APs don't like getting a superset of their rates 671 * in the association request (e.g. D-Link DAP 1353 in 672 * b-only mode)... 673 */ 674 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 675 assoc_data->supp_rates, 676 assoc_data->supp_rates_len, 677 &rates); 678 } else { 679 /* 680 * In case AP not provide any supported rates information 681 * before association, we send information element(s) with 682 * all rates that we support. 683 */ 684 rates_len = 0; 685 for (i = 0; i < sband->n_bitrates; i++) { 686 rates |= BIT(i); 687 rates_len++; 688 } 689 } 690 691 skb = alloc_skb(local->hw.extra_tx_headroom + 692 sizeof(*mgmt) + /* bit too much but doesn't matter */ 693 2 + assoc_data->ssid_len + /* SSID */ 694 4 + rates_len + /* (extended) rates */ 695 4 + /* power capability */ 696 2 + 2 * sband->n_channels + /* supported channels */ 697 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 698 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 699 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 700 sizeof(struct ieee80211_he_mcs_nss_supp) + 701 IEEE80211_HE_PPE_THRES_MAX_LEN + 702 assoc_data->ie_len + /* extra IEs */ 703 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 704 9, /* WMM */ 705 GFP_KERNEL); 706 if (!skb) 707 return; 708 709 skb_reserve(skb, local->hw.extra_tx_headroom); 710 711 capab = WLAN_CAPABILITY_ESS; 712 713 if (sband->band == NL80211_BAND_2GHZ) { 714 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 715 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 716 } 717 718 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 719 capab |= WLAN_CAPABILITY_PRIVACY; 720 721 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 722 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 723 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 724 725 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 726 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 727 728 mgmt = skb_put_zero(skb, 24); 729 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 730 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 731 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 732 733 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 734 skb_put(skb, 10); 735 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 736 IEEE80211_STYPE_REASSOC_REQ); 737 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 738 mgmt->u.reassoc_req.listen_interval = 739 cpu_to_le16(local->hw.conf.listen_interval); 740 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 741 ETH_ALEN); 742 } else { 743 skb_put(skb, 4); 744 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 745 IEEE80211_STYPE_ASSOC_REQ); 746 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 747 mgmt->u.assoc_req.listen_interval = 748 cpu_to_le16(local->hw.conf.listen_interval); 749 } 750 751 /* SSID */ 752 pos = skb_put(skb, 2 + assoc_data->ssid_len); 753 ie_start = pos; 754 *pos++ = WLAN_EID_SSID; 755 *pos++ = assoc_data->ssid_len; 756 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 757 758 /* add all rates which were marked to be used above */ 759 supp_rates_len = rates_len; 760 if (supp_rates_len > 8) 761 supp_rates_len = 8; 762 763 pos = skb_put(skb, supp_rates_len + 2); 764 *pos++ = WLAN_EID_SUPP_RATES; 765 *pos++ = supp_rates_len; 766 767 count = 0; 768 for (i = 0; i < sband->n_bitrates; i++) { 769 if (BIT(i) & rates) { 770 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 771 5 * (1 << shift)); 772 *pos++ = (u8) rate; 773 if (++count == 8) 774 break; 775 } 776 } 777 778 if (rates_len > count) { 779 pos = skb_put(skb, rates_len - count + 2); 780 *pos++ = WLAN_EID_EXT_SUPP_RATES; 781 *pos++ = rates_len - count; 782 783 for (i++; i < sband->n_bitrates; i++) { 784 if (BIT(i) & rates) { 785 int rate; 786 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 787 5 * (1 << shift)); 788 *pos++ = (u8) rate; 789 } 790 } 791 } 792 793 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 794 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 795 pos = skb_put(skb, 4); 796 *pos++ = WLAN_EID_PWR_CAPABILITY; 797 *pos++ = 2; 798 *pos++ = 0; /* min tx power */ 799 /* max tx power */ 800 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 801 } 802 803 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 804 /* TODO: get this in reg domain format */ 805 pos = skb_put(skb, 2 * sband->n_channels + 2); 806 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 807 *pos++ = 2 * sband->n_channels; 808 for (i = 0; i < sband->n_channels; i++) { 809 *pos++ = ieee80211_frequency_to_channel( 810 sband->channels[i].center_freq); 811 *pos++ = 1; /* one channel in the subband*/ 812 } 813 } 814 815 /* Set MBSSID support for HE AP if needed */ 816 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 817 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) { 818 struct element *elem; 819 820 /* we know it's writable, cast away the const */ 821 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 822 assoc_data->ie, 823 assoc_data->ie_len); 824 825 /* We can probably assume both always true */ 826 if (elem && elem->datalen >= 3) 827 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 828 } 829 830 /* if present, add any custom IEs that go before HT */ 831 if (assoc_data->ie_len) { 832 static const u8 before_ht[] = { 833 WLAN_EID_SSID, 834 WLAN_EID_SUPP_RATES, 835 WLAN_EID_EXT_SUPP_RATES, 836 WLAN_EID_PWR_CAPABILITY, 837 WLAN_EID_SUPPORTED_CHANNELS, 838 WLAN_EID_RSN, 839 WLAN_EID_QOS_CAPA, 840 WLAN_EID_RRM_ENABLED_CAPABILITIES, 841 WLAN_EID_MOBILITY_DOMAIN, 842 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 843 WLAN_EID_RIC_DATA, /* reassoc only */ 844 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 845 }; 846 static const u8 after_ric[] = { 847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 848 WLAN_EID_HT_CAPABILITY, 849 WLAN_EID_BSS_COEX_2040, 850 /* luckily this is almost always there */ 851 WLAN_EID_EXT_CAPABILITY, 852 WLAN_EID_QOS_TRAFFIC_CAPA, 853 WLAN_EID_TIM_BCAST_REQ, 854 WLAN_EID_INTERWORKING, 855 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 856 WLAN_EID_VHT_CAPABILITY, 857 WLAN_EID_OPMODE_NOTIF, 858 }; 859 860 noffset = ieee80211_ie_split_ric(assoc_data->ie, 861 assoc_data->ie_len, 862 before_ht, 863 ARRAY_SIZE(before_ht), 864 after_ric, 865 ARRAY_SIZE(after_ric), 866 offset); 867 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 868 offset = noffset; 869 } 870 871 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 872 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 873 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 874 875 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 876 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 877 sband, chan, sdata->smps_mode); 878 879 /* if present, add any custom IEs that go before VHT */ 880 if (assoc_data->ie_len) { 881 static const u8 before_vht[] = { 882 /* 883 * no need to list the ones split off before HT 884 * or generated here 885 */ 886 WLAN_EID_BSS_COEX_2040, 887 WLAN_EID_EXT_CAPABILITY, 888 WLAN_EID_QOS_TRAFFIC_CAPA, 889 WLAN_EID_TIM_BCAST_REQ, 890 WLAN_EID_INTERWORKING, 891 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 892 }; 893 894 /* RIC already taken above, so no need to handle here anymore */ 895 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 896 before_vht, ARRAY_SIZE(before_vht), 897 offset); 898 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 899 offset = noffset; 900 } 901 902 /* if present, add any custom IEs that go before HE */ 903 if (assoc_data->ie_len) { 904 static const u8 before_he[] = { 905 /* 906 * no need to list the ones split off before VHT 907 * or generated here 908 */ 909 WLAN_EID_OPMODE_NOTIF, 910 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 911 /* 11ai elements */ 912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 913 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 916 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 917 /* TODO: add 11ah/11aj/11ak elements */ 918 }; 919 920 /* RIC already taken above, so no need to handle here anymore */ 921 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 922 before_he, ARRAY_SIZE(before_he), 923 offset); 924 pos = skb_put(skb, noffset - offset); 925 memcpy(pos, assoc_data->ie + offset, noffset - offset); 926 offset = noffset; 927 } 928 929 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 930 ieee80211_add_vht_ie(sdata, skb, sband, 931 &assoc_data->ap_vht_cap); 932 933 /* 934 * If AP doesn't support HT, mark HE as disabled. 935 * If on the 5GHz band, make sure it supports VHT. 936 */ 937 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 938 (sband->band == NL80211_BAND_5GHZ && 939 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 940 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 941 942 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 943 ieee80211_add_he_ie(sdata, skb, sband); 944 945 /* if present, add any custom non-vendor IEs that go after HE */ 946 if (assoc_data->ie_len) { 947 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 948 assoc_data->ie_len, 949 offset); 950 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 951 offset = noffset; 952 } 953 954 if (assoc_data->wmm) { 955 if (assoc_data->uapsd) { 956 qos_info = ifmgd->uapsd_queues; 957 qos_info |= (ifmgd->uapsd_max_sp_len << 958 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 959 } else { 960 qos_info = 0; 961 } 962 963 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 964 } 965 966 /* add any remaining custom (i.e. vendor specific here) IEs */ 967 if (assoc_data->ie_len) { 968 noffset = assoc_data->ie_len; 969 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 970 } 971 972 if (assoc_data->fils_kek_len && 973 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 974 dev_kfree_skb(skb); 975 return; 976 } 977 978 pos = skb_tail_pointer(skb); 979 kfree(ifmgd->assoc_req_ies); 980 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 981 ifmgd->assoc_req_ies_len = pos - ie_start; 982 983 drv_mgd_prepare_tx(local, sdata, 0); 984 985 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 986 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 987 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 988 IEEE80211_TX_INTFL_MLME_CONN_TX; 989 ieee80211_tx_skb(sdata, skb); 990 } 991 992 void ieee80211_send_pspoll(struct ieee80211_local *local, 993 struct ieee80211_sub_if_data *sdata) 994 { 995 struct ieee80211_pspoll *pspoll; 996 struct sk_buff *skb; 997 998 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 999 if (!skb) 1000 return; 1001 1002 pspoll = (struct ieee80211_pspoll *) skb->data; 1003 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1004 1005 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1006 ieee80211_tx_skb(sdata, skb); 1007 } 1008 1009 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1010 struct ieee80211_sub_if_data *sdata, 1011 bool powersave) 1012 { 1013 struct sk_buff *skb; 1014 struct ieee80211_hdr_3addr *nullfunc; 1015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1016 1017 /* Don't send NDPs when STA is connected HE */ 1018 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1019 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1020 return; 1021 1022 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1023 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1024 if (!skb) 1025 return; 1026 1027 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1028 if (powersave) 1029 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1030 1031 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1032 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1033 1034 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1035 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1036 1037 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1038 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1039 1040 ieee80211_tx_skb(sdata, skb); 1041 } 1042 1043 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1044 struct ieee80211_sub_if_data *sdata) 1045 { 1046 struct sk_buff *skb; 1047 struct ieee80211_hdr *nullfunc; 1048 __le16 fc; 1049 1050 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1051 return; 1052 1053 /* Don't send NDPs when connected HE */ 1054 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1055 return; 1056 1057 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1058 if (!skb) 1059 return; 1060 1061 skb_reserve(skb, local->hw.extra_tx_headroom); 1062 1063 nullfunc = skb_put_zero(skb, 30); 1064 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1065 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1066 nullfunc->frame_control = fc; 1067 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1068 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1069 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1070 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1071 1072 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1073 ieee80211_tx_skb(sdata, skb); 1074 } 1075 1076 /* spectrum management related things */ 1077 static void ieee80211_chswitch_work(struct work_struct *work) 1078 { 1079 struct ieee80211_sub_if_data *sdata = 1080 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1081 struct ieee80211_local *local = sdata->local; 1082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1083 int ret; 1084 1085 if (!ieee80211_sdata_running(sdata)) 1086 return; 1087 1088 sdata_lock(sdata); 1089 mutex_lock(&local->mtx); 1090 mutex_lock(&local->chanctx_mtx); 1091 1092 if (!ifmgd->associated) 1093 goto out; 1094 1095 if (!sdata->vif.csa_active) 1096 goto out; 1097 1098 /* 1099 * using reservation isn't immediate as it may be deferred until later 1100 * with multi-vif. once reservation is complete it will re-schedule the 1101 * work with no reserved_chanctx so verify chandef to check if it 1102 * completed successfully 1103 */ 1104 1105 if (sdata->reserved_chanctx) { 1106 struct ieee80211_supported_band *sband = NULL; 1107 struct sta_info *mgd_sta = NULL; 1108 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1109 1110 /* 1111 * with multi-vif csa driver may call ieee80211_csa_finish() 1112 * many times while waiting for other interfaces to use their 1113 * reservations 1114 */ 1115 if (sdata->reserved_ready) 1116 goto out; 1117 1118 if (sdata->vif.bss_conf.chandef.width != 1119 sdata->csa_chandef.width) { 1120 /* 1121 * For managed interface, we need to also update the AP 1122 * station bandwidth and align the rate scale algorithm 1123 * on the bandwidth change. Here we only consider the 1124 * bandwidth of the new channel definition (as channel 1125 * switch flow does not have the full HT/VHT/HE 1126 * information), assuming that if additional changes are 1127 * required they would be done as part of the processing 1128 * of the next beacon from the AP. 1129 */ 1130 switch (sdata->csa_chandef.width) { 1131 case NL80211_CHAN_WIDTH_20_NOHT: 1132 case NL80211_CHAN_WIDTH_20: 1133 default: 1134 bw = IEEE80211_STA_RX_BW_20; 1135 break; 1136 case NL80211_CHAN_WIDTH_40: 1137 bw = IEEE80211_STA_RX_BW_40; 1138 break; 1139 case NL80211_CHAN_WIDTH_80: 1140 bw = IEEE80211_STA_RX_BW_80; 1141 break; 1142 case NL80211_CHAN_WIDTH_80P80: 1143 case NL80211_CHAN_WIDTH_160: 1144 bw = IEEE80211_STA_RX_BW_160; 1145 break; 1146 } 1147 1148 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1149 sband = 1150 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1151 } 1152 1153 if (sdata->vif.bss_conf.chandef.width > 1154 sdata->csa_chandef.width) { 1155 mgd_sta->sta.bandwidth = bw; 1156 rate_control_rate_update(local, sband, mgd_sta, 1157 IEEE80211_RC_BW_CHANGED); 1158 } 1159 1160 ret = ieee80211_vif_use_reserved_context(sdata); 1161 if (ret) { 1162 sdata_info(sdata, 1163 "failed to use reserved channel context, disconnecting (err=%d)\n", 1164 ret); 1165 ieee80211_queue_work(&sdata->local->hw, 1166 &ifmgd->csa_connection_drop_work); 1167 goto out; 1168 } 1169 1170 if (sdata->vif.bss_conf.chandef.width < 1171 sdata->csa_chandef.width) { 1172 mgd_sta->sta.bandwidth = bw; 1173 rate_control_rate_update(local, sband, mgd_sta, 1174 IEEE80211_RC_BW_CHANGED); 1175 } 1176 1177 goto out; 1178 } 1179 1180 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1181 &sdata->csa_chandef)) { 1182 sdata_info(sdata, 1183 "failed to finalize channel switch, disconnecting\n"); 1184 ieee80211_queue_work(&sdata->local->hw, 1185 &ifmgd->csa_connection_drop_work); 1186 goto out; 1187 } 1188 1189 ifmgd->csa_waiting_bcn = true; 1190 1191 ieee80211_sta_reset_beacon_monitor(sdata); 1192 ieee80211_sta_reset_conn_monitor(sdata); 1193 1194 out: 1195 mutex_unlock(&local->chanctx_mtx); 1196 mutex_unlock(&local->mtx); 1197 sdata_unlock(sdata); 1198 } 1199 1200 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1201 { 1202 struct ieee80211_local *local = sdata->local; 1203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1204 int ret; 1205 1206 sdata_assert_lock(sdata); 1207 1208 WARN_ON(!sdata->vif.csa_active); 1209 1210 if (sdata->csa_block_tx) { 1211 ieee80211_wake_vif_queues(local, sdata, 1212 IEEE80211_QUEUE_STOP_REASON_CSA); 1213 sdata->csa_block_tx = false; 1214 } 1215 1216 sdata->vif.csa_active = false; 1217 ifmgd->csa_waiting_bcn = false; 1218 1219 ret = drv_post_channel_switch(sdata); 1220 if (ret) { 1221 sdata_info(sdata, 1222 "driver post channel switch failed, disconnecting\n"); 1223 ieee80211_queue_work(&local->hw, 1224 &ifmgd->csa_connection_drop_work); 1225 return; 1226 } 1227 1228 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1229 } 1230 1231 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1232 { 1233 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1235 1236 trace_api_chswitch_done(sdata, success); 1237 if (!success) { 1238 sdata_info(sdata, 1239 "driver channel switch failed, disconnecting\n"); 1240 ieee80211_queue_work(&sdata->local->hw, 1241 &ifmgd->csa_connection_drop_work); 1242 } else { 1243 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1244 } 1245 } 1246 EXPORT_SYMBOL(ieee80211_chswitch_done); 1247 1248 static void ieee80211_chswitch_timer(struct timer_list *t) 1249 { 1250 struct ieee80211_sub_if_data *sdata = 1251 from_timer(sdata, t, u.mgd.chswitch_timer); 1252 1253 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1254 } 1255 1256 static void 1257 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1258 { 1259 struct ieee80211_local *local = sdata->local; 1260 1261 if (!local->ops->abort_channel_switch) 1262 return; 1263 1264 mutex_lock(&local->mtx); 1265 1266 mutex_lock(&local->chanctx_mtx); 1267 ieee80211_vif_unreserve_chanctx(sdata); 1268 mutex_unlock(&local->chanctx_mtx); 1269 1270 if (sdata->csa_block_tx) 1271 ieee80211_wake_vif_queues(local, sdata, 1272 IEEE80211_QUEUE_STOP_REASON_CSA); 1273 1274 sdata->csa_block_tx = false; 1275 sdata->vif.csa_active = false; 1276 1277 mutex_unlock(&local->mtx); 1278 1279 drv_abort_channel_switch(sdata); 1280 } 1281 1282 static void 1283 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1284 u64 timestamp, u32 device_timestamp, 1285 struct ieee802_11_elems *elems, 1286 bool beacon) 1287 { 1288 struct ieee80211_local *local = sdata->local; 1289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1290 struct cfg80211_bss *cbss = ifmgd->associated; 1291 struct ieee80211_chanctx_conf *conf; 1292 struct ieee80211_chanctx *chanctx; 1293 enum nl80211_band current_band; 1294 struct ieee80211_csa_ie csa_ie; 1295 struct ieee80211_channel_switch ch_switch; 1296 int res; 1297 1298 sdata_assert_lock(sdata); 1299 1300 if (!cbss) 1301 return; 1302 1303 if (local->scanning) 1304 return; 1305 1306 current_band = cbss->channel->band; 1307 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1308 ifmgd->flags, 1309 ifmgd->associated->bssid, &csa_ie); 1310 1311 if (!res) { 1312 ch_switch.timestamp = timestamp; 1313 ch_switch.device_timestamp = device_timestamp; 1314 ch_switch.block_tx = beacon ? csa_ie.mode : 0; 1315 ch_switch.chandef = csa_ie.chandef; 1316 ch_switch.count = csa_ie.count; 1317 ch_switch.delay = csa_ie.max_switch_time; 1318 } 1319 1320 if (res < 0) { 1321 ieee80211_queue_work(&local->hw, 1322 &ifmgd->csa_connection_drop_work); 1323 return; 1324 } 1325 1326 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1327 if (res) 1328 ieee80211_sta_abort_chanswitch(sdata); 1329 else 1330 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1331 return; 1332 } else if (sdata->vif.csa_active || res) { 1333 /* disregard subsequent announcements if already processing */ 1334 return; 1335 } 1336 1337 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1338 IEEE80211_CHAN_DISABLED)) { 1339 sdata_info(sdata, 1340 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1341 ifmgd->associated->bssid, 1342 csa_ie.chandef.chan->center_freq, 1343 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1344 csa_ie.chandef.center_freq2); 1345 ieee80211_queue_work(&local->hw, 1346 &ifmgd->csa_connection_drop_work); 1347 return; 1348 } 1349 1350 if (cfg80211_chandef_identical(&csa_ie.chandef, 1351 &sdata->vif.bss_conf.chandef) && 1352 (!csa_ie.mode || !beacon)) { 1353 if (ifmgd->csa_ignored_same_chan) 1354 return; 1355 sdata_info(sdata, 1356 "AP %pM tries to chanswitch to same channel, ignore\n", 1357 ifmgd->associated->bssid); 1358 ifmgd->csa_ignored_same_chan = true; 1359 return; 1360 } 1361 1362 /* 1363 * Drop all TDLS peers - either we disconnect or move to a different 1364 * channel from this point on. There's no telling what our peer will do. 1365 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1366 * have an incompatible wider chandef. 1367 */ 1368 ieee80211_teardown_tdls_peers(sdata); 1369 1370 mutex_lock(&local->mtx); 1371 mutex_lock(&local->chanctx_mtx); 1372 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1373 lockdep_is_held(&local->chanctx_mtx)); 1374 if (!conf) { 1375 sdata_info(sdata, 1376 "no channel context assigned to vif?, disconnecting\n"); 1377 goto drop_connection; 1378 } 1379 1380 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1381 1382 if (local->use_chanctx && 1383 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1384 sdata_info(sdata, 1385 "driver doesn't support chan-switch with channel contexts\n"); 1386 goto drop_connection; 1387 } 1388 1389 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1390 sdata_info(sdata, 1391 "preparing for channel switch failed, disconnecting\n"); 1392 goto drop_connection; 1393 } 1394 1395 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1396 chanctx->mode, false); 1397 if (res) { 1398 sdata_info(sdata, 1399 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1400 res); 1401 goto drop_connection; 1402 } 1403 mutex_unlock(&local->chanctx_mtx); 1404 1405 sdata->vif.csa_active = true; 1406 sdata->csa_chandef = csa_ie.chandef; 1407 sdata->csa_block_tx = ch_switch.block_tx; 1408 ifmgd->csa_ignored_same_chan = false; 1409 1410 if (sdata->csa_block_tx) 1411 ieee80211_stop_vif_queues(local, sdata, 1412 IEEE80211_QUEUE_STOP_REASON_CSA); 1413 mutex_unlock(&local->mtx); 1414 1415 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1416 csa_ie.count); 1417 1418 if (local->ops->channel_switch) { 1419 /* use driver's channel switch callback */ 1420 drv_channel_switch(local, sdata, &ch_switch); 1421 return; 1422 } 1423 1424 /* channel switch handled in software */ 1425 if (csa_ie.count <= 1) 1426 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1427 else 1428 mod_timer(&ifmgd->chswitch_timer, 1429 TU_TO_EXP_TIME((csa_ie.count - 1) * 1430 cbss->beacon_interval)); 1431 return; 1432 drop_connection: 1433 /* 1434 * This is just so that the disconnect flow will know that 1435 * we were trying to switch channel and failed. In case the 1436 * mode is 1 (we are not allowed to Tx), we will know not to 1437 * send a deauthentication frame. Those two fields will be 1438 * reset when the disconnection worker runs. 1439 */ 1440 sdata->vif.csa_active = true; 1441 sdata->csa_block_tx = ch_switch.block_tx; 1442 1443 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1444 mutex_unlock(&local->chanctx_mtx); 1445 mutex_unlock(&local->mtx); 1446 } 1447 1448 static bool 1449 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1450 struct ieee80211_channel *channel, 1451 const u8 *country_ie, u8 country_ie_len, 1452 const u8 *pwr_constr_elem, 1453 int *chan_pwr, int *pwr_reduction) 1454 { 1455 struct ieee80211_country_ie_triplet *triplet; 1456 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1457 int i, chan_increment; 1458 bool have_chan_pwr = false; 1459 1460 /* Invalid IE */ 1461 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1462 return false; 1463 1464 triplet = (void *)(country_ie + 3); 1465 country_ie_len -= 3; 1466 1467 switch (channel->band) { 1468 default: 1469 WARN_ON_ONCE(1); 1470 /* fall through */ 1471 case NL80211_BAND_2GHZ: 1472 case NL80211_BAND_60GHZ: 1473 chan_increment = 1; 1474 break; 1475 case NL80211_BAND_5GHZ: 1476 chan_increment = 4; 1477 break; 1478 } 1479 1480 /* find channel */ 1481 while (country_ie_len >= 3) { 1482 u8 first_channel = triplet->chans.first_channel; 1483 1484 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1485 goto next; 1486 1487 for (i = 0; i < triplet->chans.num_channels; i++) { 1488 if (first_channel + i * chan_increment == chan) { 1489 have_chan_pwr = true; 1490 *chan_pwr = triplet->chans.max_power; 1491 break; 1492 } 1493 } 1494 if (have_chan_pwr) 1495 break; 1496 1497 next: 1498 triplet++; 1499 country_ie_len -= 3; 1500 } 1501 1502 if (have_chan_pwr && pwr_constr_elem) 1503 *pwr_reduction = *pwr_constr_elem; 1504 else 1505 *pwr_reduction = 0; 1506 1507 return have_chan_pwr; 1508 } 1509 1510 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1511 struct ieee80211_channel *channel, 1512 const u8 *cisco_dtpc_ie, 1513 int *pwr_level) 1514 { 1515 /* From practical testing, the first data byte of the DTPC element 1516 * seems to contain the requested dBm level, and the CLI on Cisco 1517 * APs clearly state the range is -127 to 127 dBm, which indicates 1518 * a signed byte, although it seemingly never actually goes negative. 1519 * The other byte seems to always be zero. 1520 */ 1521 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1522 } 1523 1524 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1525 struct ieee80211_channel *channel, 1526 struct ieee80211_mgmt *mgmt, 1527 const u8 *country_ie, u8 country_ie_len, 1528 const u8 *pwr_constr_ie, 1529 const u8 *cisco_dtpc_ie) 1530 { 1531 bool has_80211h_pwr = false, has_cisco_pwr = false; 1532 int chan_pwr = 0, pwr_reduction_80211h = 0; 1533 int pwr_level_cisco, pwr_level_80211h; 1534 int new_ap_level; 1535 __le16 capab = mgmt->u.probe_resp.capab_info; 1536 1537 if (country_ie && 1538 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1539 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1540 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1541 sdata, channel, country_ie, country_ie_len, 1542 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1543 pwr_level_80211h = 1544 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1545 } 1546 1547 if (cisco_dtpc_ie) { 1548 ieee80211_find_cisco_dtpc( 1549 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1550 has_cisco_pwr = true; 1551 } 1552 1553 if (!has_80211h_pwr && !has_cisco_pwr) 1554 return 0; 1555 1556 /* If we have both 802.11h and Cisco DTPC, apply both limits 1557 * by picking the smallest of the two power levels advertised. 1558 */ 1559 if (has_80211h_pwr && 1560 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1561 new_ap_level = pwr_level_80211h; 1562 1563 if (sdata->ap_power_level == new_ap_level) 1564 return 0; 1565 1566 sdata_dbg(sdata, 1567 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1568 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1569 sdata->u.mgd.bssid); 1570 } else { /* has_cisco_pwr is always true here. */ 1571 new_ap_level = pwr_level_cisco; 1572 1573 if (sdata->ap_power_level == new_ap_level) 1574 return 0; 1575 1576 sdata_dbg(sdata, 1577 "Limiting TX power to %d dBm as advertised by %pM\n", 1578 pwr_level_cisco, sdata->u.mgd.bssid); 1579 } 1580 1581 sdata->ap_power_level = new_ap_level; 1582 if (__ieee80211_recalc_txpower(sdata)) 1583 return BSS_CHANGED_TXPOWER; 1584 return 0; 1585 } 1586 1587 /* powersave */ 1588 static void ieee80211_enable_ps(struct ieee80211_local *local, 1589 struct ieee80211_sub_if_data *sdata) 1590 { 1591 struct ieee80211_conf *conf = &local->hw.conf; 1592 1593 /* 1594 * If we are scanning right now then the parameters will 1595 * take effect when scan finishes. 1596 */ 1597 if (local->scanning) 1598 return; 1599 1600 if (conf->dynamic_ps_timeout > 0 && 1601 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1602 mod_timer(&local->dynamic_ps_timer, jiffies + 1603 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1604 } else { 1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1606 ieee80211_send_nullfunc(local, sdata, true); 1607 1608 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1609 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1610 return; 1611 1612 conf->flags |= IEEE80211_CONF_PS; 1613 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1614 } 1615 } 1616 1617 static void ieee80211_change_ps(struct ieee80211_local *local) 1618 { 1619 struct ieee80211_conf *conf = &local->hw.conf; 1620 1621 if (local->ps_sdata) { 1622 ieee80211_enable_ps(local, local->ps_sdata); 1623 } else if (conf->flags & IEEE80211_CONF_PS) { 1624 conf->flags &= ~IEEE80211_CONF_PS; 1625 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1626 del_timer_sync(&local->dynamic_ps_timer); 1627 cancel_work_sync(&local->dynamic_ps_enable_work); 1628 } 1629 } 1630 1631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1632 { 1633 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1634 struct sta_info *sta = NULL; 1635 bool authorized = false; 1636 1637 if (!mgd->powersave) 1638 return false; 1639 1640 if (mgd->broken_ap) 1641 return false; 1642 1643 if (!mgd->associated) 1644 return false; 1645 1646 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1647 return false; 1648 1649 if (!mgd->have_beacon) 1650 return false; 1651 1652 rcu_read_lock(); 1653 sta = sta_info_get(sdata, mgd->bssid); 1654 if (sta) 1655 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1656 rcu_read_unlock(); 1657 1658 return authorized; 1659 } 1660 1661 /* need to hold RTNL or interface lock */ 1662 void ieee80211_recalc_ps(struct ieee80211_local *local) 1663 { 1664 struct ieee80211_sub_if_data *sdata, *found = NULL; 1665 int count = 0; 1666 int timeout; 1667 1668 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1669 local->ps_sdata = NULL; 1670 return; 1671 } 1672 1673 list_for_each_entry(sdata, &local->interfaces, list) { 1674 if (!ieee80211_sdata_running(sdata)) 1675 continue; 1676 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1677 /* If an AP vif is found, then disable PS 1678 * by setting the count to zero thereby setting 1679 * ps_sdata to NULL. 1680 */ 1681 count = 0; 1682 break; 1683 } 1684 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1685 continue; 1686 found = sdata; 1687 count++; 1688 } 1689 1690 if (count == 1 && ieee80211_powersave_allowed(found)) { 1691 u8 dtimper = found->u.mgd.dtim_period; 1692 1693 timeout = local->dynamic_ps_forced_timeout; 1694 if (timeout < 0) 1695 timeout = 100; 1696 local->hw.conf.dynamic_ps_timeout = timeout; 1697 1698 /* If the TIM IE is invalid, pretend the value is 1 */ 1699 if (!dtimper) 1700 dtimper = 1; 1701 1702 local->hw.conf.ps_dtim_period = dtimper; 1703 local->ps_sdata = found; 1704 } else { 1705 local->ps_sdata = NULL; 1706 } 1707 1708 ieee80211_change_ps(local); 1709 } 1710 1711 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1712 { 1713 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1714 1715 if (sdata->vif.bss_conf.ps != ps_allowed) { 1716 sdata->vif.bss_conf.ps = ps_allowed; 1717 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1718 } 1719 } 1720 1721 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1722 { 1723 struct ieee80211_local *local = 1724 container_of(work, struct ieee80211_local, 1725 dynamic_ps_disable_work); 1726 1727 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1728 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1729 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1730 } 1731 1732 ieee80211_wake_queues_by_reason(&local->hw, 1733 IEEE80211_MAX_QUEUE_MAP, 1734 IEEE80211_QUEUE_STOP_REASON_PS, 1735 false); 1736 } 1737 1738 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1739 { 1740 struct ieee80211_local *local = 1741 container_of(work, struct ieee80211_local, 1742 dynamic_ps_enable_work); 1743 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1744 struct ieee80211_if_managed *ifmgd; 1745 unsigned long flags; 1746 int q; 1747 1748 /* can only happen when PS was just disabled anyway */ 1749 if (!sdata) 1750 return; 1751 1752 ifmgd = &sdata->u.mgd; 1753 1754 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1755 return; 1756 1757 if (local->hw.conf.dynamic_ps_timeout > 0) { 1758 /* don't enter PS if TX frames are pending */ 1759 if (drv_tx_frames_pending(local)) { 1760 mod_timer(&local->dynamic_ps_timer, jiffies + 1761 msecs_to_jiffies( 1762 local->hw.conf.dynamic_ps_timeout)); 1763 return; 1764 } 1765 1766 /* 1767 * transmission can be stopped by others which leads to 1768 * dynamic_ps_timer expiry. Postpone the ps timer if it 1769 * is not the actual idle state. 1770 */ 1771 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1772 for (q = 0; q < local->hw.queues; q++) { 1773 if (local->queue_stop_reasons[q]) { 1774 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1775 flags); 1776 mod_timer(&local->dynamic_ps_timer, jiffies + 1777 msecs_to_jiffies( 1778 local->hw.conf.dynamic_ps_timeout)); 1779 return; 1780 } 1781 } 1782 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1783 } 1784 1785 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1786 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1787 if (drv_tx_frames_pending(local)) { 1788 mod_timer(&local->dynamic_ps_timer, jiffies + 1789 msecs_to_jiffies( 1790 local->hw.conf.dynamic_ps_timeout)); 1791 } else { 1792 ieee80211_send_nullfunc(local, sdata, true); 1793 /* Flush to get the tx status of nullfunc frame */ 1794 ieee80211_flush_queues(local, sdata, false); 1795 } 1796 } 1797 1798 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1799 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1800 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1801 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1802 local->hw.conf.flags |= IEEE80211_CONF_PS; 1803 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1804 } 1805 } 1806 1807 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1808 { 1809 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1810 1811 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1812 } 1813 1814 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1815 { 1816 struct delayed_work *delayed_work = to_delayed_work(work); 1817 struct ieee80211_sub_if_data *sdata = 1818 container_of(delayed_work, struct ieee80211_sub_if_data, 1819 dfs_cac_timer_work); 1820 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1821 1822 mutex_lock(&sdata->local->mtx); 1823 if (sdata->wdev.cac_started) { 1824 ieee80211_vif_release_channel(sdata); 1825 cfg80211_cac_event(sdata->dev, &chandef, 1826 NL80211_RADAR_CAC_FINISHED, 1827 GFP_KERNEL); 1828 } 1829 mutex_unlock(&sdata->local->mtx); 1830 } 1831 1832 static bool 1833 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1834 { 1835 struct ieee80211_local *local = sdata->local; 1836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1837 bool ret = false; 1838 int ac; 1839 1840 if (local->hw.queues < IEEE80211_NUM_ACS) 1841 return false; 1842 1843 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1844 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1845 int non_acm_ac; 1846 unsigned long now = jiffies; 1847 1848 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1849 tx_tspec->admitted_time && 1850 time_after(now, tx_tspec->time_slice_start + HZ)) { 1851 tx_tspec->consumed_tx_time = 0; 1852 tx_tspec->time_slice_start = now; 1853 1854 if (tx_tspec->downgraded) 1855 tx_tspec->action = 1856 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1857 } 1858 1859 switch (tx_tspec->action) { 1860 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1861 /* take the original parameters */ 1862 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1863 sdata_err(sdata, 1864 "failed to set TX queue parameters for queue %d\n", 1865 ac); 1866 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1867 tx_tspec->downgraded = false; 1868 ret = true; 1869 break; 1870 case TX_TSPEC_ACTION_DOWNGRADE: 1871 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1872 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1873 ret = true; 1874 break; 1875 } 1876 /* downgrade next lower non-ACM AC */ 1877 for (non_acm_ac = ac + 1; 1878 non_acm_ac < IEEE80211_NUM_ACS; 1879 non_acm_ac++) 1880 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1881 break; 1882 /* Usually the loop will result in using BK even if it 1883 * requires admission control, but such a configuration 1884 * makes no sense and we have to transmit somehow - the 1885 * AC selection does the same thing. 1886 * If we started out trying to downgrade from BK, then 1887 * the extra condition here might be needed. 1888 */ 1889 if (non_acm_ac >= IEEE80211_NUM_ACS) 1890 non_acm_ac = IEEE80211_AC_BK; 1891 if (drv_conf_tx(local, sdata, ac, 1892 &sdata->tx_conf[non_acm_ac])) 1893 sdata_err(sdata, 1894 "failed to set TX queue parameters for queue %d\n", 1895 ac); 1896 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1897 ret = true; 1898 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1899 tx_tspec->time_slice_start + HZ - now + 1); 1900 break; 1901 case TX_TSPEC_ACTION_NONE: 1902 /* nothing now */ 1903 break; 1904 } 1905 } 1906 1907 return ret; 1908 } 1909 1910 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1911 { 1912 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1913 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1914 } 1915 1916 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1917 { 1918 struct ieee80211_sub_if_data *sdata; 1919 1920 sdata = container_of(work, struct ieee80211_sub_if_data, 1921 u.mgd.tx_tspec_wk.work); 1922 ieee80211_sta_handle_tspec_ac_params(sdata); 1923 } 1924 1925 /* MLME */ 1926 static bool 1927 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1928 struct ieee80211_sub_if_data *sdata, 1929 const u8 *wmm_param, size_t wmm_param_len, 1930 const struct ieee80211_mu_edca_param_set *mu_edca) 1931 { 1932 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1934 size_t left; 1935 int count, mu_edca_count, ac; 1936 const u8 *pos; 1937 u8 uapsd_queues = 0; 1938 1939 if (!local->ops->conf_tx) 1940 return false; 1941 1942 if (local->hw.queues < IEEE80211_NUM_ACS) 1943 return false; 1944 1945 if (!wmm_param) 1946 return false; 1947 1948 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1949 return false; 1950 1951 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1952 uapsd_queues = ifmgd->uapsd_queues; 1953 1954 count = wmm_param[6] & 0x0f; 1955 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 1956 * if mu_edca was preset before and now it disappeared tell 1957 * the driver about it. 1958 */ 1959 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 1960 if (count == ifmgd->wmm_last_param_set && 1961 mu_edca_count == ifmgd->mu_edca_last_param_set) 1962 return false; 1963 ifmgd->wmm_last_param_set = count; 1964 ifmgd->mu_edca_last_param_set = mu_edca_count; 1965 1966 pos = wmm_param + 8; 1967 left = wmm_param_len - 8; 1968 1969 memset(¶ms, 0, sizeof(params)); 1970 1971 sdata->wmm_acm = 0; 1972 for (; left >= 4; left -= 4, pos += 4) { 1973 int aci = (pos[0] >> 5) & 0x03; 1974 int acm = (pos[0] >> 4) & 0x01; 1975 bool uapsd = false; 1976 1977 switch (aci) { 1978 case 1: /* AC_BK */ 1979 ac = IEEE80211_AC_BK; 1980 if (acm) 1981 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1982 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1983 uapsd = true; 1984 params[ac].mu_edca = !!mu_edca; 1985 if (mu_edca) 1986 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 1987 break; 1988 case 2: /* AC_VI */ 1989 ac = IEEE80211_AC_VI; 1990 if (acm) 1991 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1992 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1993 uapsd = true; 1994 params[ac].mu_edca = !!mu_edca; 1995 if (mu_edca) 1996 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 1997 break; 1998 case 3: /* AC_VO */ 1999 ac = IEEE80211_AC_VO; 2000 if (acm) 2001 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2002 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2003 uapsd = true; 2004 params[ac].mu_edca = !!mu_edca; 2005 if (mu_edca) 2006 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2007 break; 2008 case 0: /* AC_BE */ 2009 default: 2010 ac = IEEE80211_AC_BE; 2011 if (acm) 2012 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2013 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2014 uapsd = true; 2015 params[ac].mu_edca = !!mu_edca; 2016 if (mu_edca) 2017 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2018 break; 2019 } 2020 2021 params[ac].aifs = pos[0] & 0x0f; 2022 2023 if (params[ac].aifs < 2) { 2024 sdata_info(sdata, 2025 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2026 params[ac].aifs, aci); 2027 params[ac].aifs = 2; 2028 } 2029 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2030 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2031 params[ac].txop = get_unaligned_le16(pos + 2); 2032 params[ac].acm = acm; 2033 params[ac].uapsd = uapsd; 2034 2035 if (params[ac].cw_min == 0 || 2036 params[ac].cw_min > params[ac].cw_max) { 2037 sdata_info(sdata, 2038 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2039 params[ac].cw_min, params[ac].cw_max, aci); 2040 return false; 2041 } 2042 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2043 } 2044 2045 /* WMM specification requires all 4 ACIs. */ 2046 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2047 if (params[ac].cw_min == 0) { 2048 sdata_info(sdata, 2049 "AP has invalid WMM params (missing AC %d), using defaults\n", 2050 ac); 2051 return false; 2052 } 2053 } 2054 2055 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2056 mlme_dbg(sdata, 2057 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2058 ac, params[ac].acm, 2059 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2060 params[ac].txop, params[ac].uapsd, 2061 ifmgd->tx_tspec[ac].downgraded); 2062 sdata->tx_conf[ac] = params[ac]; 2063 if (!ifmgd->tx_tspec[ac].downgraded && 2064 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2065 sdata_err(sdata, 2066 "failed to set TX queue parameters for AC %d\n", 2067 ac); 2068 } 2069 2070 /* enable WMM or activate new settings */ 2071 sdata->vif.bss_conf.qos = true; 2072 return true; 2073 } 2074 2075 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2076 { 2077 lockdep_assert_held(&sdata->local->mtx); 2078 2079 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2080 ieee80211_run_deferred_scan(sdata->local); 2081 } 2082 2083 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2084 { 2085 mutex_lock(&sdata->local->mtx); 2086 __ieee80211_stop_poll(sdata); 2087 mutex_unlock(&sdata->local->mtx); 2088 } 2089 2090 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2091 u16 capab, bool erp_valid, u8 erp) 2092 { 2093 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2094 struct ieee80211_supported_band *sband; 2095 u32 changed = 0; 2096 bool use_protection; 2097 bool use_short_preamble; 2098 bool use_short_slot; 2099 2100 sband = ieee80211_get_sband(sdata); 2101 if (!sband) 2102 return changed; 2103 2104 if (erp_valid) { 2105 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2106 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2107 } else { 2108 use_protection = false; 2109 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2110 } 2111 2112 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2113 if (sband->band == NL80211_BAND_5GHZ) 2114 use_short_slot = true; 2115 2116 if (use_protection != bss_conf->use_cts_prot) { 2117 bss_conf->use_cts_prot = use_protection; 2118 changed |= BSS_CHANGED_ERP_CTS_PROT; 2119 } 2120 2121 if (use_short_preamble != bss_conf->use_short_preamble) { 2122 bss_conf->use_short_preamble = use_short_preamble; 2123 changed |= BSS_CHANGED_ERP_PREAMBLE; 2124 } 2125 2126 if (use_short_slot != bss_conf->use_short_slot) { 2127 bss_conf->use_short_slot = use_short_slot; 2128 changed |= BSS_CHANGED_ERP_SLOT; 2129 } 2130 2131 return changed; 2132 } 2133 2134 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2135 struct cfg80211_bss *cbss, 2136 u32 bss_info_changed) 2137 { 2138 struct ieee80211_bss *bss = (void *)cbss->priv; 2139 struct ieee80211_local *local = sdata->local; 2140 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2141 2142 bss_info_changed |= BSS_CHANGED_ASSOC; 2143 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2144 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2145 2146 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2147 beacon_loss_count * bss_conf->beacon_int)); 2148 2149 sdata->u.mgd.associated = cbss; 2150 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2151 2152 ieee80211_check_rate_mask(sdata); 2153 2154 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2155 2156 if (sdata->vif.p2p || 2157 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2158 const struct cfg80211_bss_ies *ies; 2159 2160 rcu_read_lock(); 2161 ies = rcu_dereference(cbss->ies); 2162 if (ies) { 2163 int ret; 2164 2165 ret = cfg80211_get_p2p_attr( 2166 ies->data, ies->len, 2167 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2168 (u8 *) &bss_conf->p2p_noa_attr, 2169 sizeof(bss_conf->p2p_noa_attr)); 2170 if (ret >= 2) { 2171 sdata->u.mgd.p2p_noa_index = 2172 bss_conf->p2p_noa_attr.index; 2173 bss_info_changed |= BSS_CHANGED_P2P_PS; 2174 } 2175 } 2176 rcu_read_unlock(); 2177 } 2178 2179 /* just to be sure */ 2180 ieee80211_stop_poll(sdata); 2181 2182 ieee80211_led_assoc(local, 1); 2183 2184 if (sdata->u.mgd.have_beacon) { 2185 /* 2186 * If the AP is buggy we may get here with no DTIM period 2187 * known, so assume it's 1 which is the only safe assumption 2188 * in that case, although if the TIM IE is broken powersave 2189 * probably just won't work at all. 2190 */ 2191 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2192 bss_conf->beacon_rate = bss->beacon_rate; 2193 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2194 } else { 2195 bss_conf->beacon_rate = NULL; 2196 bss_conf->dtim_period = 0; 2197 } 2198 2199 bss_conf->assoc = 1; 2200 2201 /* Tell the driver to monitor connection quality (if supported) */ 2202 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2203 bss_conf->cqm_rssi_thold) 2204 bss_info_changed |= BSS_CHANGED_CQM; 2205 2206 /* Enable ARP filtering */ 2207 if (bss_conf->arp_addr_cnt) 2208 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2209 2210 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2211 2212 mutex_lock(&local->iflist_mtx); 2213 ieee80211_recalc_ps(local); 2214 mutex_unlock(&local->iflist_mtx); 2215 2216 ieee80211_recalc_smps(sdata); 2217 ieee80211_recalc_ps_vif(sdata); 2218 2219 netif_carrier_on(sdata->dev); 2220 } 2221 2222 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2223 u16 stype, u16 reason, bool tx, 2224 u8 *frame_buf) 2225 { 2226 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2227 struct ieee80211_local *local = sdata->local; 2228 u32 changed = 0; 2229 2230 sdata_assert_lock(sdata); 2231 2232 if (WARN_ON_ONCE(tx && !frame_buf)) 2233 return; 2234 2235 if (WARN_ON(!ifmgd->associated)) 2236 return; 2237 2238 ieee80211_stop_poll(sdata); 2239 2240 ifmgd->associated = NULL; 2241 netif_carrier_off(sdata->dev); 2242 2243 /* 2244 * if we want to get out of ps before disassoc (why?) we have 2245 * to do it before sending disassoc, as otherwise the null-packet 2246 * won't be valid. 2247 */ 2248 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2249 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2250 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2251 } 2252 local->ps_sdata = NULL; 2253 2254 /* disable per-vif ps */ 2255 ieee80211_recalc_ps_vif(sdata); 2256 2257 /* make sure ongoing transmission finishes */ 2258 synchronize_net(); 2259 2260 /* 2261 * drop any frame before deauth/disassoc, this can be data or 2262 * management frame. Since we are disconnecting, we should not 2263 * insist sending these frames which can take time and delay 2264 * the disconnection and possible the roaming. 2265 */ 2266 if (tx) 2267 ieee80211_flush_queues(local, sdata, true); 2268 2269 /* deauthenticate/disassociate now */ 2270 if (tx || frame_buf) { 2271 /* 2272 * In multi channel scenarios guarantee that the virtual 2273 * interface is granted immediate airtime to transmit the 2274 * deauthentication frame by calling mgd_prepare_tx, if the 2275 * driver requested so. 2276 */ 2277 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2278 !ifmgd->have_beacon) 2279 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2280 2281 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2282 ifmgd->bssid, stype, reason, 2283 tx, frame_buf); 2284 } 2285 2286 /* flush out frame - make sure the deauth was actually sent */ 2287 if (tx) 2288 ieee80211_flush_queues(local, sdata, false); 2289 2290 /* clear bssid only after building the needed mgmt frames */ 2291 eth_zero_addr(ifmgd->bssid); 2292 2293 /* remove AP and TDLS peers */ 2294 sta_info_flush(sdata); 2295 2296 /* finally reset all BSS / config parameters */ 2297 changed |= ieee80211_reset_erp_info(sdata); 2298 2299 ieee80211_led_assoc(local, 0); 2300 changed |= BSS_CHANGED_ASSOC; 2301 sdata->vif.bss_conf.assoc = false; 2302 2303 ifmgd->p2p_noa_index = -1; 2304 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2305 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2306 2307 /* on the next assoc, re-program HT/VHT parameters */ 2308 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2309 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2310 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2311 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2312 2313 /* reset MU-MIMO ownership and group data */ 2314 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2315 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2316 memset(sdata->vif.bss_conf.mu_group.position, 0, 2317 sizeof(sdata->vif.bss_conf.mu_group.position)); 2318 changed |= BSS_CHANGED_MU_GROUPS; 2319 sdata->vif.mu_mimo_owner = false; 2320 2321 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2322 2323 del_timer_sync(&local->dynamic_ps_timer); 2324 cancel_work_sync(&local->dynamic_ps_enable_work); 2325 2326 /* Disable ARP filtering */ 2327 if (sdata->vif.bss_conf.arp_addr_cnt) 2328 changed |= BSS_CHANGED_ARP_FILTER; 2329 2330 sdata->vif.bss_conf.qos = false; 2331 changed |= BSS_CHANGED_QOS; 2332 2333 /* The BSSID (not really interesting) and HT changed */ 2334 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2335 ieee80211_bss_info_change_notify(sdata, changed); 2336 2337 /* disassociated - set to defaults now */ 2338 ieee80211_set_wmm_default(sdata, false, false); 2339 2340 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2341 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2342 del_timer_sync(&sdata->u.mgd.timer); 2343 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2344 2345 sdata->vif.bss_conf.dtim_period = 0; 2346 sdata->vif.bss_conf.beacon_rate = NULL; 2347 2348 ifmgd->have_beacon = false; 2349 2350 ifmgd->flags = 0; 2351 mutex_lock(&local->mtx); 2352 ieee80211_vif_release_channel(sdata); 2353 2354 sdata->vif.csa_active = false; 2355 ifmgd->csa_waiting_bcn = false; 2356 ifmgd->csa_ignored_same_chan = false; 2357 if (sdata->csa_block_tx) { 2358 ieee80211_wake_vif_queues(local, sdata, 2359 IEEE80211_QUEUE_STOP_REASON_CSA); 2360 sdata->csa_block_tx = false; 2361 } 2362 mutex_unlock(&local->mtx); 2363 2364 /* existing TX TSPEC sessions no longer exist */ 2365 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2366 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2367 2368 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2369 } 2370 2371 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2372 struct ieee80211_hdr *hdr) 2373 { 2374 /* 2375 * We can postpone the mgd.timer whenever receiving unicast frames 2376 * from AP because we know that the connection is working both ways 2377 * at that time. But multicast frames (and hence also beacons) must 2378 * be ignored here, because we need to trigger the timer during 2379 * data idle periods for sending the periodic probe request to the 2380 * AP we're connected to. 2381 */ 2382 if (is_multicast_ether_addr(hdr->addr1)) 2383 return; 2384 2385 ieee80211_sta_reset_conn_monitor(sdata); 2386 } 2387 2388 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2389 { 2390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2391 struct ieee80211_local *local = sdata->local; 2392 2393 mutex_lock(&local->mtx); 2394 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2395 goto out; 2396 2397 __ieee80211_stop_poll(sdata); 2398 2399 mutex_lock(&local->iflist_mtx); 2400 ieee80211_recalc_ps(local); 2401 mutex_unlock(&local->iflist_mtx); 2402 2403 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2404 goto out; 2405 2406 /* 2407 * We've received a probe response, but are not sure whether 2408 * we have or will be receiving any beacons or data, so let's 2409 * schedule the timers again, just in case. 2410 */ 2411 ieee80211_sta_reset_beacon_monitor(sdata); 2412 2413 mod_timer(&ifmgd->conn_mon_timer, 2414 round_jiffies_up(jiffies + 2415 IEEE80211_CONNECTION_IDLE_TIME)); 2416 out: 2417 mutex_unlock(&local->mtx); 2418 } 2419 2420 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2421 struct ieee80211_hdr *hdr, 2422 u16 tx_time) 2423 { 2424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2425 u16 tid = ieee80211_get_tid(hdr); 2426 int ac = ieee80211_ac_from_tid(tid); 2427 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2428 unsigned long now = jiffies; 2429 2430 if (likely(!tx_tspec->admitted_time)) 2431 return; 2432 2433 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2434 tx_tspec->consumed_tx_time = 0; 2435 tx_tspec->time_slice_start = now; 2436 2437 if (tx_tspec->downgraded) { 2438 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2439 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2440 } 2441 } 2442 2443 if (tx_tspec->downgraded) 2444 return; 2445 2446 tx_tspec->consumed_tx_time += tx_time; 2447 2448 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2449 tx_tspec->downgraded = true; 2450 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2451 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2452 } 2453 } 2454 2455 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2456 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2457 { 2458 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2459 2460 if (!ieee80211_is_data(hdr->frame_control)) 2461 return; 2462 2463 if (ieee80211_is_nullfunc(hdr->frame_control) && 2464 sdata->u.mgd.probe_send_count > 0) { 2465 if (ack) 2466 ieee80211_sta_reset_conn_monitor(sdata); 2467 else 2468 sdata->u.mgd.nullfunc_failed = true; 2469 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2470 return; 2471 } 2472 2473 if (ack) 2474 ieee80211_sta_reset_conn_monitor(sdata); 2475 } 2476 2477 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2478 const u8 *src, const u8 *dst, 2479 const u8 *ssid, size_t ssid_len, 2480 struct ieee80211_channel *channel) 2481 { 2482 struct sk_buff *skb; 2483 2484 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2485 ssid, ssid_len, NULL, 0, 2486 IEEE80211_PROBE_FLAG_DIRECTED); 2487 if (skb) 2488 ieee80211_tx_skb(sdata, skb); 2489 } 2490 2491 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2492 { 2493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2494 const u8 *ssid; 2495 u8 *dst = ifmgd->associated->bssid; 2496 u8 unicast_limit = max(1, max_probe_tries - 3); 2497 struct sta_info *sta; 2498 2499 /* 2500 * Try sending broadcast probe requests for the last three 2501 * probe requests after the first ones failed since some 2502 * buggy APs only support broadcast probe requests. 2503 */ 2504 if (ifmgd->probe_send_count >= unicast_limit) 2505 dst = NULL; 2506 2507 /* 2508 * When the hardware reports an accurate Tx ACK status, it's 2509 * better to send a nullfunc frame instead of a probe request, 2510 * as it will kick us off the AP quickly if we aren't associated 2511 * anymore. The timeout will be reset if the frame is ACKed by 2512 * the AP. 2513 */ 2514 ifmgd->probe_send_count++; 2515 2516 if (dst) { 2517 mutex_lock(&sdata->local->sta_mtx); 2518 sta = sta_info_get(sdata, dst); 2519 if (!WARN_ON(!sta)) 2520 ieee80211_check_fast_rx(sta); 2521 mutex_unlock(&sdata->local->sta_mtx); 2522 } 2523 2524 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2525 ifmgd->nullfunc_failed = false; 2526 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 2527 ifmgd->probe_send_count--; 2528 else 2529 ieee80211_send_nullfunc(sdata->local, sdata, false); 2530 } else { 2531 int ssid_len; 2532 2533 rcu_read_lock(); 2534 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2535 if (WARN_ON_ONCE(ssid == NULL)) 2536 ssid_len = 0; 2537 else 2538 ssid_len = ssid[1]; 2539 2540 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2541 ssid + 2, ssid_len, 2542 ifmgd->associated->channel); 2543 rcu_read_unlock(); 2544 } 2545 2546 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2547 run_again(sdata, ifmgd->probe_timeout); 2548 } 2549 2550 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2551 bool beacon) 2552 { 2553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2554 bool already = false; 2555 2556 if (!ieee80211_sdata_running(sdata)) 2557 return; 2558 2559 sdata_lock(sdata); 2560 2561 if (!ifmgd->associated) 2562 goto out; 2563 2564 mutex_lock(&sdata->local->mtx); 2565 2566 if (sdata->local->tmp_channel || sdata->local->scanning) { 2567 mutex_unlock(&sdata->local->mtx); 2568 goto out; 2569 } 2570 2571 if (beacon) { 2572 mlme_dbg_ratelimited(sdata, 2573 "detected beacon loss from AP (missed %d beacons) - probing\n", 2574 beacon_loss_count); 2575 2576 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2577 } 2578 2579 /* 2580 * The driver/our work has already reported this event or the 2581 * connection monitoring has kicked in and we have already sent 2582 * a probe request. Or maybe the AP died and the driver keeps 2583 * reporting until we disassociate... 2584 * 2585 * In either case we have to ignore the current call to this 2586 * function (except for setting the correct probe reason bit) 2587 * because otherwise we would reset the timer every time and 2588 * never check whether we received a probe response! 2589 */ 2590 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2591 already = true; 2592 2593 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2594 2595 mutex_unlock(&sdata->local->mtx); 2596 2597 if (already) 2598 goto out; 2599 2600 mutex_lock(&sdata->local->iflist_mtx); 2601 ieee80211_recalc_ps(sdata->local); 2602 mutex_unlock(&sdata->local->iflist_mtx); 2603 2604 ifmgd->probe_send_count = 0; 2605 ieee80211_mgd_probe_ap_send(sdata); 2606 out: 2607 sdata_unlock(sdata); 2608 } 2609 2610 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2611 struct ieee80211_vif *vif) 2612 { 2613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2615 struct cfg80211_bss *cbss; 2616 struct sk_buff *skb; 2617 const u8 *ssid; 2618 int ssid_len; 2619 2620 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2621 return NULL; 2622 2623 sdata_assert_lock(sdata); 2624 2625 if (ifmgd->associated) 2626 cbss = ifmgd->associated; 2627 else if (ifmgd->auth_data) 2628 cbss = ifmgd->auth_data->bss; 2629 else if (ifmgd->assoc_data) 2630 cbss = ifmgd->assoc_data->bss; 2631 else 2632 return NULL; 2633 2634 rcu_read_lock(); 2635 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2636 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2637 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2638 ssid_len = 0; 2639 else 2640 ssid_len = ssid[1]; 2641 2642 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2643 (u32) -1, cbss->channel, 2644 ssid + 2, ssid_len, 2645 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2646 rcu_read_unlock(); 2647 2648 return skb; 2649 } 2650 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2651 2652 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2653 const u8 *buf, size_t len, bool tx, 2654 u16 reason) 2655 { 2656 struct ieee80211_event event = { 2657 .type = MLME_EVENT, 2658 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2659 .u.mlme.reason = reason, 2660 }; 2661 2662 if (tx) 2663 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2664 else 2665 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2666 2667 drv_event_callback(sdata->local, sdata, &event); 2668 } 2669 2670 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2671 { 2672 struct ieee80211_local *local = sdata->local; 2673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2674 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2675 bool tx; 2676 2677 sdata_lock(sdata); 2678 if (!ifmgd->associated) { 2679 sdata_unlock(sdata); 2680 return; 2681 } 2682 2683 tx = !sdata->csa_block_tx; 2684 2685 /* AP is probably out of range (or not reachable for another reason) so 2686 * remove the bss struct for that AP. 2687 */ 2688 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2689 2690 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2691 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2692 tx, frame_buf); 2693 mutex_lock(&local->mtx); 2694 sdata->vif.csa_active = false; 2695 ifmgd->csa_waiting_bcn = false; 2696 if (sdata->csa_block_tx) { 2697 ieee80211_wake_vif_queues(local, sdata, 2698 IEEE80211_QUEUE_STOP_REASON_CSA); 2699 sdata->csa_block_tx = false; 2700 } 2701 mutex_unlock(&local->mtx); 2702 2703 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2704 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2705 2706 sdata_unlock(sdata); 2707 } 2708 2709 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2710 { 2711 struct ieee80211_sub_if_data *sdata = 2712 container_of(work, struct ieee80211_sub_if_data, 2713 u.mgd.beacon_connection_loss_work); 2714 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2715 2716 if (ifmgd->associated) 2717 ifmgd->beacon_loss_count++; 2718 2719 if (ifmgd->connection_loss) { 2720 sdata_info(sdata, "Connection to AP %pM lost\n", 2721 ifmgd->bssid); 2722 __ieee80211_disconnect(sdata); 2723 } else { 2724 ieee80211_mgd_probe_ap(sdata, true); 2725 } 2726 } 2727 2728 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2729 { 2730 struct ieee80211_sub_if_data *sdata = 2731 container_of(work, struct ieee80211_sub_if_data, 2732 u.mgd.csa_connection_drop_work); 2733 2734 __ieee80211_disconnect(sdata); 2735 } 2736 2737 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2738 { 2739 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2740 struct ieee80211_hw *hw = &sdata->local->hw; 2741 2742 trace_api_beacon_loss(sdata); 2743 2744 sdata->u.mgd.connection_loss = false; 2745 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2746 } 2747 EXPORT_SYMBOL(ieee80211_beacon_loss); 2748 2749 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2750 { 2751 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2752 struct ieee80211_hw *hw = &sdata->local->hw; 2753 2754 trace_api_connection_loss(sdata); 2755 2756 sdata->u.mgd.connection_loss = true; 2757 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2758 } 2759 EXPORT_SYMBOL(ieee80211_connection_loss); 2760 2761 2762 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2763 bool assoc) 2764 { 2765 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2766 2767 sdata_assert_lock(sdata); 2768 2769 if (!assoc) { 2770 /* 2771 * we are not authenticated yet, the only timer that could be 2772 * running is the timeout for the authentication response which 2773 * which is not relevant anymore. 2774 */ 2775 del_timer_sync(&sdata->u.mgd.timer); 2776 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2777 2778 eth_zero_addr(sdata->u.mgd.bssid); 2779 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2780 sdata->u.mgd.flags = 0; 2781 mutex_lock(&sdata->local->mtx); 2782 ieee80211_vif_release_channel(sdata); 2783 mutex_unlock(&sdata->local->mtx); 2784 } 2785 2786 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2787 kfree(auth_data); 2788 sdata->u.mgd.auth_data = NULL; 2789 } 2790 2791 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2792 bool assoc, bool abandon) 2793 { 2794 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2795 2796 sdata_assert_lock(sdata); 2797 2798 if (!assoc) { 2799 /* 2800 * we are not associated yet, the only timer that could be 2801 * running is the timeout for the association response which 2802 * which is not relevant anymore. 2803 */ 2804 del_timer_sync(&sdata->u.mgd.timer); 2805 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2806 2807 eth_zero_addr(sdata->u.mgd.bssid); 2808 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2809 sdata->u.mgd.flags = 0; 2810 sdata->vif.mu_mimo_owner = false; 2811 2812 mutex_lock(&sdata->local->mtx); 2813 ieee80211_vif_release_channel(sdata); 2814 mutex_unlock(&sdata->local->mtx); 2815 2816 if (abandon) 2817 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2818 } 2819 2820 kfree(assoc_data); 2821 sdata->u.mgd.assoc_data = NULL; 2822 } 2823 2824 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2825 struct ieee80211_mgmt *mgmt, size_t len) 2826 { 2827 struct ieee80211_local *local = sdata->local; 2828 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2829 u8 *pos; 2830 struct ieee802_11_elems elems; 2831 u32 tx_flags = 0; 2832 2833 pos = mgmt->u.auth.variable; 2834 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2835 mgmt->bssid, auth_data->bss->bssid); 2836 if (!elems.challenge) 2837 return; 2838 auth_data->expected_transaction = 4; 2839 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2840 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2841 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2842 IEEE80211_TX_INTFL_MLME_CONN_TX; 2843 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2844 elems.challenge - 2, elems.challenge_len + 2, 2845 auth_data->bss->bssid, auth_data->bss->bssid, 2846 auth_data->key, auth_data->key_len, 2847 auth_data->key_idx, tx_flags); 2848 } 2849 2850 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2851 const u8 *bssid) 2852 { 2853 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2854 struct sta_info *sta; 2855 bool result = true; 2856 2857 sdata_info(sdata, "authenticated\n"); 2858 ifmgd->auth_data->done = true; 2859 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2860 ifmgd->auth_data->timeout_started = true; 2861 run_again(sdata, ifmgd->auth_data->timeout); 2862 2863 /* move station state to auth */ 2864 mutex_lock(&sdata->local->sta_mtx); 2865 sta = sta_info_get(sdata, bssid); 2866 if (!sta) { 2867 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2868 result = false; 2869 goto out; 2870 } 2871 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2872 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2873 result = false; 2874 goto out; 2875 } 2876 2877 out: 2878 mutex_unlock(&sdata->local->sta_mtx); 2879 return result; 2880 } 2881 2882 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2883 struct ieee80211_mgmt *mgmt, size_t len) 2884 { 2885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2886 u8 bssid[ETH_ALEN]; 2887 u16 auth_alg, auth_transaction, status_code; 2888 struct ieee80211_event event = { 2889 .type = MLME_EVENT, 2890 .u.mlme.data = AUTH_EVENT, 2891 }; 2892 2893 sdata_assert_lock(sdata); 2894 2895 if (len < 24 + 6) 2896 return; 2897 2898 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2899 return; 2900 2901 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2902 2903 if (!ether_addr_equal(bssid, mgmt->bssid)) 2904 return; 2905 2906 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2907 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2908 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2909 2910 if (auth_alg != ifmgd->auth_data->algorithm || 2911 (auth_alg != WLAN_AUTH_SAE && 2912 auth_transaction != ifmgd->auth_data->expected_transaction) || 2913 (auth_alg == WLAN_AUTH_SAE && 2914 (auth_transaction < ifmgd->auth_data->expected_transaction || 2915 auth_transaction > 2))) { 2916 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2917 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2918 auth_transaction, 2919 ifmgd->auth_data->expected_transaction); 2920 return; 2921 } 2922 2923 if (status_code != WLAN_STATUS_SUCCESS) { 2924 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2925 mgmt->sa, status_code); 2926 ieee80211_destroy_auth_data(sdata, false); 2927 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2928 event.u.mlme.status = MLME_DENIED; 2929 event.u.mlme.reason = status_code; 2930 drv_event_callback(sdata->local, sdata, &event); 2931 return; 2932 } 2933 2934 switch (ifmgd->auth_data->algorithm) { 2935 case WLAN_AUTH_OPEN: 2936 case WLAN_AUTH_LEAP: 2937 case WLAN_AUTH_FT: 2938 case WLAN_AUTH_SAE: 2939 case WLAN_AUTH_FILS_SK: 2940 case WLAN_AUTH_FILS_SK_PFS: 2941 case WLAN_AUTH_FILS_PK: 2942 break; 2943 case WLAN_AUTH_SHARED_KEY: 2944 if (ifmgd->auth_data->expected_transaction != 4) { 2945 ieee80211_auth_challenge(sdata, mgmt, len); 2946 /* need another frame */ 2947 return; 2948 } 2949 break; 2950 default: 2951 WARN_ONCE(1, "invalid auth alg %d", 2952 ifmgd->auth_data->algorithm); 2953 return; 2954 } 2955 2956 event.u.mlme.status = MLME_SUCCESS; 2957 drv_event_callback(sdata->local, sdata, &event); 2958 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 2959 (auth_transaction == 2 && 2960 ifmgd->auth_data->expected_transaction == 2)) { 2961 if (!ieee80211_mark_sta_auth(sdata, bssid)) 2962 goto out_err; 2963 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2964 auth_transaction == 2) { 2965 sdata_info(sdata, "SAE peer confirmed\n"); 2966 ifmgd->auth_data->peer_confirmed = true; 2967 } 2968 2969 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2970 return; 2971 out_err: 2972 mutex_unlock(&sdata->local->sta_mtx); 2973 /* ignore frame -- wait for timeout */ 2974 } 2975 2976 #define case_WLAN(type) \ 2977 case WLAN_REASON_##type: return #type 2978 2979 const char *ieee80211_get_reason_code_string(u16 reason_code) 2980 { 2981 switch (reason_code) { 2982 case_WLAN(UNSPECIFIED); 2983 case_WLAN(PREV_AUTH_NOT_VALID); 2984 case_WLAN(DEAUTH_LEAVING); 2985 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2986 case_WLAN(DISASSOC_AP_BUSY); 2987 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2988 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2989 case_WLAN(DISASSOC_STA_HAS_LEFT); 2990 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2991 case_WLAN(DISASSOC_BAD_POWER); 2992 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2993 case_WLAN(INVALID_IE); 2994 case_WLAN(MIC_FAILURE); 2995 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2996 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2997 case_WLAN(IE_DIFFERENT); 2998 case_WLAN(INVALID_GROUP_CIPHER); 2999 case_WLAN(INVALID_PAIRWISE_CIPHER); 3000 case_WLAN(INVALID_AKMP); 3001 case_WLAN(UNSUPP_RSN_VERSION); 3002 case_WLAN(INVALID_RSN_IE_CAP); 3003 case_WLAN(IEEE8021X_FAILED); 3004 case_WLAN(CIPHER_SUITE_REJECTED); 3005 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3006 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3007 case_WLAN(DISASSOC_LOW_ACK); 3008 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3009 case_WLAN(QSTA_LEAVE_QBSS); 3010 case_WLAN(QSTA_NOT_USE); 3011 case_WLAN(QSTA_REQUIRE_SETUP); 3012 case_WLAN(QSTA_TIMEOUT); 3013 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3014 case_WLAN(MESH_PEER_CANCELED); 3015 case_WLAN(MESH_MAX_PEERS); 3016 case_WLAN(MESH_CONFIG); 3017 case_WLAN(MESH_CLOSE); 3018 case_WLAN(MESH_MAX_RETRIES); 3019 case_WLAN(MESH_CONFIRM_TIMEOUT); 3020 case_WLAN(MESH_INVALID_GTK); 3021 case_WLAN(MESH_INCONSISTENT_PARAM); 3022 case_WLAN(MESH_INVALID_SECURITY); 3023 case_WLAN(MESH_PATH_ERROR); 3024 case_WLAN(MESH_PATH_NOFORWARD); 3025 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3026 case_WLAN(MAC_EXISTS_IN_MBSS); 3027 case_WLAN(MESH_CHAN_REGULATORY); 3028 case_WLAN(MESH_CHAN); 3029 default: return "<unknown>"; 3030 } 3031 } 3032 3033 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3034 struct ieee80211_mgmt *mgmt, size_t len) 3035 { 3036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3037 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3038 3039 sdata_assert_lock(sdata); 3040 3041 if (len < 24 + 2) 3042 return; 3043 3044 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3045 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3046 return; 3047 } 3048 3049 if (ifmgd->associated && 3050 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3051 const u8 *bssid = ifmgd->associated->bssid; 3052 3053 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3054 bssid, reason_code, 3055 ieee80211_get_reason_code_string(reason_code)); 3056 3057 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3058 3059 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3060 reason_code); 3061 return; 3062 } 3063 3064 if (ifmgd->assoc_data && 3065 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3066 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3067 3068 sdata_info(sdata, 3069 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3070 bssid, reason_code, 3071 ieee80211_get_reason_code_string(reason_code)); 3072 3073 ieee80211_destroy_assoc_data(sdata, false, true); 3074 3075 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3076 return; 3077 } 3078 } 3079 3080 3081 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3082 struct ieee80211_mgmt *mgmt, size_t len) 3083 { 3084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3085 u16 reason_code; 3086 3087 sdata_assert_lock(sdata); 3088 3089 if (len < 24 + 2) 3090 return; 3091 3092 if (!ifmgd->associated || 3093 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3094 return; 3095 3096 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3097 3098 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3099 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3100 return; 3101 } 3102 3103 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3104 mgmt->sa, reason_code, 3105 ieee80211_get_reason_code_string(reason_code)); 3106 3107 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3108 3109 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3110 } 3111 3112 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3113 u8 *supp_rates, unsigned int supp_rates_len, 3114 u32 *rates, u32 *basic_rates, 3115 bool *have_higher_than_11mbit, 3116 int *min_rate, int *min_rate_index, 3117 int shift) 3118 { 3119 int i, j; 3120 3121 for (i = 0; i < supp_rates_len; i++) { 3122 int rate = supp_rates[i] & 0x7f; 3123 bool is_basic = !!(supp_rates[i] & 0x80); 3124 3125 if ((rate * 5 * (1 << shift)) > 110) 3126 *have_higher_than_11mbit = true; 3127 3128 /* 3129 * Skip HT and VHT BSS membership selectors since they're not 3130 * rates. 3131 * 3132 * Note: Even though the membership selector and the basic 3133 * rate flag share the same bit, they are not exactly 3134 * the same. 3135 */ 3136 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3137 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3138 continue; 3139 3140 for (j = 0; j < sband->n_bitrates; j++) { 3141 struct ieee80211_rate *br; 3142 int brate; 3143 3144 br = &sband->bitrates[j]; 3145 3146 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3147 if (brate == rate) { 3148 *rates |= BIT(j); 3149 if (is_basic) 3150 *basic_rates |= BIT(j); 3151 if ((rate * 5) < *min_rate) { 3152 *min_rate = rate * 5; 3153 *min_rate_index = j; 3154 } 3155 break; 3156 } 3157 } 3158 } 3159 } 3160 3161 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3162 const struct ieee802_11_elems *elems) 3163 { 3164 if (elems->ext_capab_len < 10) 3165 return false; 3166 3167 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3168 return false; 3169 3170 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3171 IEEE80211_HE_MAC_CAP0_TWT_RES; 3172 } 3173 3174 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3175 struct sta_info *sta, 3176 struct ieee802_11_elems *elems) 3177 { 3178 bool twt = ieee80211_twt_req_supported(sta, elems); 3179 3180 if (sdata->vif.bss_conf.twt_requester != twt) { 3181 sdata->vif.bss_conf.twt_requester = twt; 3182 return BSS_CHANGED_TWT; 3183 } 3184 return 0; 3185 } 3186 3187 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3188 struct cfg80211_bss *cbss, 3189 struct ieee80211_mgmt *mgmt, size_t len, 3190 struct ieee802_11_elems *elems) 3191 { 3192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3193 struct ieee80211_local *local = sdata->local; 3194 struct ieee80211_supported_band *sband; 3195 struct sta_info *sta; 3196 u16 capab_info, aid; 3197 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3198 const struct cfg80211_bss_ies *bss_ies = NULL; 3199 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3200 u32 changed = 0; 3201 int err; 3202 bool ret; 3203 3204 /* AssocResp and ReassocResp have identical structure */ 3205 3206 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3207 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3208 3209 /* 3210 * The 5 MSB of the AID field are reserved 3211 * (802.11-2016 9.4.1.8 AID field) 3212 */ 3213 aid &= 0x7ff; 3214 3215 ifmgd->broken_ap = false; 3216 3217 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3218 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3219 aid); 3220 aid = 0; 3221 ifmgd->broken_ap = true; 3222 } 3223 3224 if (!elems->supp_rates) { 3225 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3226 return false; 3227 } 3228 3229 ifmgd->aid = aid; 3230 ifmgd->tdls_chan_switch_prohibited = 3231 elems->ext_capab && elems->ext_capab_len >= 5 && 3232 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3233 3234 /* 3235 * Some APs are erroneously not including some information in their 3236 * (re)association response frames. Try to recover by using the data 3237 * from the beacon or probe response. This seems to afflict mobile 3238 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3239 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3240 */ 3241 if ((assoc_data->wmm && !elems->wmm_param) || 3242 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3243 (!elems->ht_cap_elem || !elems->ht_operation)) || 3244 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3245 (!elems->vht_cap_elem || !elems->vht_operation))) { 3246 const struct cfg80211_bss_ies *ies; 3247 struct ieee802_11_elems bss_elems; 3248 3249 rcu_read_lock(); 3250 ies = rcu_dereference(cbss->ies); 3251 if (ies) 3252 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3253 GFP_ATOMIC); 3254 rcu_read_unlock(); 3255 if (!bss_ies) 3256 return false; 3257 3258 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3259 false, &bss_elems, 3260 mgmt->bssid, 3261 assoc_data->bss->bssid); 3262 if (assoc_data->wmm && 3263 !elems->wmm_param && bss_elems.wmm_param) { 3264 elems->wmm_param = bss_elems.wmm_param; 3265 sdata_info(sdata, 3266 "AP bug: WMM param missing from AssocResp\n"); 3267 } 3268 3269 /* 3270 * Also check if we requested HT/VHT, otherwise the AP doesn't 3271 * have to include the IEs in the (re)association response. 3272 */ 3273 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3274 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3275 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3276 sdata_info(sdata, 3277 "AP bug: HT capability missing from AssocResp\n"); 3278 } 3279 if (!elems->ht_operation && bss_elems.ht_operation && 3280 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3281 elems->ht_operation = bss_elems.ht_operation; 3282 sdata_info(sdata, 3283 "AP bug: HT operation missing from AssocResp\n"); 3284 } 3285 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3286 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3287 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3288 sdata_info(sdata, 3289 "AP bug: VHT capa missing from AssocResp\n"); 3290 } 3291 if (!elems->vht_operation && bss_elems.vht_operation && 3292 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3293 elems->vht_operation = bss_elems.vht_operation; 3294 sdata_info(sdata, 3295 "AP bug: VHT operation missing from AssocResp\n"); 3296 } 3297 } 3298 3299 /* 3300 * We previously checked these in the beacon/probe response, so 3301 * they should be present here. This is just a safety net. 3302 */ 3303 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3304 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3305 sdata_info(sdata, 3306 "HT AP is missing WMM params or HT capability/operation\n"); 3307 ret = false; 3308 goto out; 3309 } 3310 3311 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3312 (!elems->vht_cap_elem || !elems->vht_operation)) { 3313 sdata_info(sdata, 3314 "VHT AP is missing VHT capability/operation\n"); 3315 ret = false; 3316 goto out; 3317 } 3318 3319 mutex_lock(&sdata->local->sta_mtx); 3320 /* 3321 * station info was already allocated and inserted before 3322 * the association and should be available to us 3323 */ 3324 sta = sta_info_get(sdata, cbss->bssid); 3325 if (WARN_ON(!sta)) { 3326 mutex_unlock(&sdata->local->sta_mtx); 3327 ret = false; 3328 goto out; 3329 } 3330 3331 sband = ieee80211_get_sband(sdata); 3332 if (!sband) { 3333 mutex_unlock(&sdata->local->sta_mtx); 3334 ret = false; 3335 goto out; 3336 } 3337 3338 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3339 (!elems->he_cap || !elems->he_operation)) { 3340 mutex_unlock(&sdata->local->sta_mtx); 3341 sdata_info(sdata, 3342 "HE AP is missing HE capability/operation\n"); 3343 ret = false; 3344 goto out; 3345 } 3346 3347 /* Set up internal HT/VHT capabilities */ 3348 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3349 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3350 elems->ht_cap_elem, sta); 3351 3352 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3353 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3354 elems->vht_cap_elem, sta); 3355 3356 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3357 elems->he_cap) { 3358 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3359 elems->he_cap, 3360 elems->he_cap_len, 3361 sta); 3362 3363 bss_conf->he_support = sta->sta.he_cap.has_he; 3364 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3365 } else { 3366 bss_conf->he_support = false; 3367 bss_conf->twt_requester = false; 3368 } 3369 3370 if (bss_conf->he_support) { 3371 bss_conf->bss_color = 3372 le32_get_bits(elems->he_operation->he_oper_params, 3373 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3374 3375 bss_conf->htc_trig_based_pkt_ext = 3376 le32_get_bits(elems->he_operation->he_oper_params, 3377 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3378 bss_conf->frame_time_rts_th = 3379 le32_get_bits(elems->he_operation->he_oper_params, 3380 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3381 3382 bss_conf->multi_sta_back_32bit = 3383 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3384 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3385 3386 bss_conf->ack_enabled = 3387 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3388 IEEE80211_HE_MAC_CAP2_ACK_EN; 3389 3390 bss_conf->uora_exists = !!elems->uora_element; 3391 if (elems->uora_element) 3392 bss_conf->uora_ocw_range = elems->uora_element[0]; 3393 3394 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3395 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3396 /* TODO: OPEN: what happens if BSS color disable is set? */ 3397 } 3398 3399 if (cbss->transmitted_bss) { 3400 bss_conf->nontransmitted = true; 3401 ether_addr_copy(bss_conf->transmitter_bssid, 3402 cbss->transmitted_bss->bssid); 3403 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3404 bss_conf->bssid_index = cbss->bssid_index; 3405 } 3406 3407 /* 3408 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3409 * in their association response, so ignore that data for our own 3410 * configuration. If it changed since the last beacon, we'll get the 3411 * next beacon and update then. 3412 */ 3413 3414 /* 3415 * If an operating mode notification IE is present, override the 3416 * NSS calculation (that would be done in rate_control_rate_init()) 3417 * and use the # of streams from that element. 3418 */ 3419 if (elems->opmode_notif && 3420 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3421 u8 nss; 3422 3423 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3424 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3425 nss += 1; 3426 sta->sta.rx_nss = nss; 3427 } 3428 3429 rate_control_rate_init(sta); 3430 3431 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3432 set_sta_flag(sta, WLAN_STA_MFP); 3433 sta->sta.mfp = true; 3434 } else { 3435 sta->sta.mfp = false; 3436 } 3437 3438 sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3439 3440 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3441 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3442 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3443 if (err) { 3444 sdata_info(sdata, 3445 "failed to move station %pM to desired state\n", 3446 sta->sta.addr); 3447 WARN_ON(__sta_info_destroy(sta)); 3448 mutex_unlock(&sdata->local->sta_mtx); 3449 ret = false; 3450 goto out; 3451 } 3452 3453 mutex_unlock(&sdata->local->sta_mtx); 3454 3455 /* 3456 * Always handle WMM once after association regardless 3457 * of the first value the AP uses. Setting -1 here has 3458 * that effect because the AP values is an unsigned 3459 * 4-bit value. 3460 */ 3461 ifmgd->wmm_last_param_set = -1; 3462 ifmgd->mu_edca_last_param_set = -1; 3463 3464 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3465 ieee80211_set_wmm_default(sdata, false, false); 3466 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3467 elems->wmm_param_len, 3468 elems->mu_edca_param_set)) { 3469 /* still enable QoS since we might have HT/VHT */ 3470 ieee80211_set_wmm_default(sdata, false, true); 3471 /* set the disable-WMM flag in this case to disable 3472 * tracking WMM parameter changes in the beacon if 3473 * the parameters weren't actually valid. Doing so 3474 * avoids changing parameters very strangely when 3475 * the AP is going back and forth between valid and 3476 * invalid parameters. 3477 */ 3478 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3479 } 3480 changed |= BSS_CHANGED_QOS; 3481 3482 if (elems->max_idle_period_ie) { 3483 bss_conf->max_idle_period = 3484 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3485 bss_conf->protected_keep_alive = 3486 !!(elems->max_idle_period_ie->idle_options & 3487 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3488 changed |= BSS_CHANGED_KEEP_ALIVE; 3489 } else { 3490 bss_conf->max_idle_period = 0; 3491 bss_conf->protected_keep_alive = false; 3492 } 3493 3494 /* set AID and assoc capability, 3495 * ieee80211_set_associated() will tell the driver */ 3496 bss_conf->aid = aid; 3497 bss_conf->assoc_capability = capab_info; 3498 ieee80211_set_associated(sdata, cbss, changed); 3499 3500 /* 3501 * If we're using 4-addr mode, let the AP know that we're 3502 * doing so, so that it can create the STA VLAN on its side 3503 */ 3504 if (ifmgd->use_4addr) 3505 ieee80211_send_4addr_nullfunc(local, sdata); 3506 3507 /* 3508 * Start timer to probe the connection to the AP now. 3509 * Also start the timer that will detect beacon loss. 3510 */ 3511 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3512 ieee80211_sta_reset_beacon_monitor(sdata); 3513 3514 ret = true; 3515 out: 3516 kfree(bss_ies); 3517 return ret; 3518 } 3519 3520 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3521 struct ieee80211_mgmt *mgmt, 3522 size_t len) 3523 { 3524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3525 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3526 u16 capab_info, status_code, aid; 3527 struct ieee802_11_elems elems; 3528 int ac, uapsd_queues = -1; 3529 u8 *pos; 3530 bool reassoc; 3531 struct cfg80211_bss *bss; 3532 struct ieee80211_event event = { 3533 .type = MLME_EVENT, 3534 .u.mlme.data = ASSOC_EVENT, 3535 }; 3536 3537 sdata_assert_lock(sdata); 3538 3539 if (!assoc_data) 3540 return; 3541 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3542 return; 3543 3544 /* 3545 * AssocResp and ReassocResp have identical structure, so process both 3546 * of them in this function. 3547 */ 3548 3549 if (len < 24 + 6) 3550 return; 3551 3552 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3553 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3554 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3555 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3556 3557 sdata_info(sdata, 3558 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3559 reassoc ? "Rea" : "A", mgmt->sa, 3560 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3561 3562 if (assoc_data->fils_kek_len && 3563 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3564 return; 3565 3566 pos = mgmt->u.assoc_resp.variable; 3567 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3568 mgmt->bssid, assoc_data->bss->bssid); 3569 3570 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3571 elems.timeout_int && 3572 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3573 u32 tu, ms; 3574 tu = le32_to_cpu(elems.timeout_int->value); 3575 ms = tu * 1024 / 1000; 3576 sdata_info(sdata, 3577 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3578 mgmt->sa, tu, ms); 3579 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3580 assoc_data->timeout_started = true; 3581 if (ms > IEEE80211_ASSOC_TIMEOUT) 3582 run_again(sdata, assoc_data->timeout); 3583 return; 3584 } 3585 3586 bss = assoc_data->bss; 3587 3588 if (status_code != WLAN_STATUS_SUCCESS) { 3589 sdata_info(sdata, "%pM denied association (code=%d)\n", 3590 mgmt->sa, status_code); 3591 ieee80211_destroy_assoc_data(sdata, false, false); 3592 event.u.mlme.status = MLME_DENIED; 3593 event.u.mlme.reason = status_code; 3594 drv_event_callback(sdata->local, sdata, &event); 3595 } else { 3596 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) { 3597 /* oops -- internal error -- send timeout for now */ 3598 ieee80211_destroy_assoc_data(sdata, false, false); 3599 cfg80211_assoc_timeout(sdata->dev, bss); 3600 return; 3601 } 3602 event.u.mlme.status = MLME_SUCCESS; 3603 drv_event_callback(sdata->local, sdata, &event); 3604 sdata_info(sdata, "associated\n"); 3605 3606 /* 3607 * destroy assoc_data afterwards, as otherwise an idle 3608 * recalc after assoc_data is NULL but before associated 3609 * is set can cause the interface to go idle 3610 */ 3611 ieee80211_destroy_assoc_data(sdata, true, false); 3612 3613 /* get uapsd queues configuration */ 3614 uapsd_queues = 0; 3615 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3616 if (sdata->tx_conf[ac].uapsd) 3617 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3618 } 3619 3620 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues, 3621 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3622 } 3623 3624 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3625 struct ieee80211_mgmt *mgmt, size_t len, 3626 struct ieee80211_rx_status *rx_status) 3627 { 3628 struct ieee80211_local *local = sdata->local; 3629 struct ieee80211_bss *bss; 3630 struct ieee80211_channel *channel; 3631 3632 sdata_assert_lock(sdata); 3633 3634 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3635 if (!channel) 3636 return; 3637 3638 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3639 if (bss) { 3640 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3641 ieee80211_rx_bss_put(local, bss); 3642 } 3643 } 3644 3645 3646 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3647 struct sk_buff *skb) 3648 { 3649 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3650 struct ieee80211_if_managed *ifmgd; 3651 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3652 size_t baselen, len = skb->len; 3653 3654 ifmgd = &sdata->u.mgd; 3655 3656 sdata_assert_lock(sdata); 3657 3658 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3659 return; /* ignore ProbeResp to foreign address */ 3660 3661 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3662 if (baselen > len) 3663 return; 3664 3665 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3666 3667 if (ifmgd->associated && 3668 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3669 ieee80211_reset_ap_probe(sdata); 3670 } 3671 3672 /* 3673 * This is the canonical list of information elements we care about, 3674 * the filter code also gives us all changes to the Microsoft OUI 3675 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3676 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3677 * changes to requested client power. 3678 * 3679 * We implement beacon filtering in software since that means we can 3680 * avoid processing the frame here and in cfg80211, and userspace 3681 * will not be able to tell whether the hardware supports it or not. 3682 * 3683 * XXX: This list needs to be dynamic -- userspace needs to be able to 3684 * add items it requires. It also needs to be able to tell us to 3685 * look out for other vendor IEs. 3686 */ 3687 static const u64 care_about_ies = 3688 (1ULL << WLAN_EID_COUNTRY) | 3689 (1ULL << WLAN_EID_ERP_INFO) | 3690 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3691 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3692 (1ULL << WLAN_EID_HT_CAPABILITY) | 3693 (1ULL << WLAN_EID_HT_OPERATION) | 3694 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3695 3696 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3697 struct ieee80211_if_managed *ifmgd, 3698 struct ieee80211_bss_conf *bss_conf, 3699 struct ieee80211_local *local, 3700 struct ieee80211_rx_status *rx_status) 3701 { 3702 /* Track average RSSI from the Beacon frames of the current AP */ 3703 3704 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3705 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3706 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3707 ifmgd->last_cqm_event_signal = 0; 3708 ifmgd->count_beacon_signal = 1; 3709 ifmgd->last_ave_beacon_signal = 0; 3710 } else { 3711 ifmgd->count_beacon_signal++; 3712 } 3713 3714 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3715 3716 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3717 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3718 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3719 int last_sig = ifmgd->last_ave_beacon_signal; 3720 struct ieee80211_event event = { 3721 .type = RSSI_EVENT, 3722 }; 3723 3724 /* 3725 * if signal crosses either of the boundaries, invoke callback 3726 * with appropriate parameters 3727 */ 3728 if (sig > ifmgd->rssi_max_thold && 3729 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3730 ifmgd->last_ave_beacon_signal = sig; 3731 event.u.rssi.data = RSSI_EVENT_HIGH; 3732 drv_event_callback(local, sdata, &event); 3733 } else if (sig < ifmgd->rssi_min_thold && 3734 (last_sig >= ifmgd->rssi_max_thold || 3735 last_sig == 0)) { 3736 ifmgd->last_ave_beacon_signal = sig; 3737 event.u.rssi.data = RSSI_EVENT_LOW; 3738 drv_event_callback(local, sdata, &event); 3739 } 3740 } 3741 3742 if (bss_conf->cqm_rssi_thold && 3743 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3744 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3745 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3746 int last_event = ifmgd->last_cqm_event_signal; 3747 int thold = bss_conf->cqm_rssi_thold; 3748 int hyst = bss_conf->cqm_rssi_hyst; 3749 3750 if (sig < thold && 3751 (last_event == 0 || sig < last_event - hyst)) { 3752 ifmgd->last_cqm_event_signal = sig; 3753 ieee80211_cqm_rssi_notify( 3754 &sdata->vif, 3755 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3756 sig, GFP_KERNEL); 3757 } else if (sig > thold && 3758 (last_event == 0 || sig > last_event + hyst)) { 3759 ifmgd->last_cqm_event_signal = sig; 3760 ieee80211_cqm_rssi_notify( 3761 &sdata->vif, 3762 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3763 sig, GFP_KERNEL); 3764 } 3765 } 3766 3767 if (bss_conf->cqm_rssi_low && 3768 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3769 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3770 int last_event = ifmgd->last_cqm_event_signal; 3771 int low = bss_conf->cqm_rssi_low; 3772 int high = bss_conf->cqm_rssi_high; 3773 3774 if (sig < low && 3775 (last_event == 0 || last_event >= low)) { 3776 ifmgd->last_cqm_event_signal = sig; 3777 ieee80211_cqm_rssi_notify( 3778 &sdata->vif, 3779 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3780 sig, GFP_KERNEL); 3781 } else if (sig > high && 3782 (last_event == 0 || last_event <= high)) { 3783 ifmgd->last_cqm_event_signal = sig; 3784 ieee80211_cqm_rssi_notify( 3785 &sdata->vif, 3786 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3787 sig, GFP_KERNEL); 3788 } 3789 } 3790 } 3791 3792 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3793 struct cfg80211_bss *bss) 3794 { 3795 if (ether_addr_equal(tx_bssid, bss->bssid)) 3796 return true; 3797 if (!bss->transmitted_bss) 3798 return false; 3799 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3800 } 3801 3802 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3803 struct ieee80211_mgmt *mgmt, size_t len, 3804 struct ieee80211_rx_status *rx_status) 3805 { 3806 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3807 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3808 size_t baselen; 3809 struct ieee802_11_elems elems; 3810 struct ieee80211_local *local = sdata->local; 3811 struct ieee80211_chanctx_conf *chanctx_conf; 3812 struct ieee80211_channel *chan; 3813 struct sta_info *sta; 3814 u32 changed = 0; 3815 bool erp_valid; 3816 u8 erp_value = 0; 3817 u32 ncrc; 3818 u8 *bssid; 3819 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3820 3821 sdata_assert_lock(sdata); 3822 3823 /* Process beacon from the current BSS */ 3824 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3825 if (baselen > len) 3826 return; 3827 3828 rcu_read_lock(); 3829 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3830 if (!chanctx_conf) { 3831 rcu_read_unlock(); 3832 return; 3833 } 3834 3835 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3836 rcu_read_unlock(); 3837 return; 3838 } 3839 chan = chanctx_conf->def.chan; 3840 rcu_read_unlock(); 3841 3842 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3843 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) { 3844 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3845 len - baselen, false, &elems, 3846 mgmt->bssid, 3847 ifmgd->assoc_data->bss->bssid); 3848 3849 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3850 3851 if (elems.dtim_period) 3852 ifmgd->dtim_period = elems.dtim_period; 3853 ifmgd->have_beacon = true; 3854 ifmgd->assoc_data->need_beacon = false; 3855 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3856 sdata->vif.bss_conf.sync_tsf = 3857 le64_to_cpu(mgmt->u.beacon.timestamp); 3858 sdata->vif.bss_conf.sync_device_ts = 3859 rx_status->device_timestamp; 3860 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3861 } 3862 3863 if (elems.mbssid_config_ie) 3864 bss_conf->profile_periodicity = 3865 elems.mbssid_config_ie->profile_periodicity; 3866 3867 if (elems.ext_capab_len >= 11 && 3868 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 3869 bss_conf->ema_ap = true; 3870 3871 /* continue assoc process */ 3872 ifmgd->assoc_data->timeout = jiffies; 3873 ifmgd->assoc_data->timeout_started = true; 3874 run_again(sdata, ifmgd->assoc_data->timeout); 3875 return; 3876 } 3877 3878 if (!ifmgd->associated || 3879 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated)) 3880 return; 3881 bssid = ifmgd->associated->bssid; 3882 3883 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3884 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3885 local, rx_status); 3886 3887 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3888 mlme_dbg_ratelimited(sdata, 3889 "cancelling AP probe due to a received beacon\n"); 3890 ieee80211_reset_ap_probe(sdata); 3891 } 3892 3893 /* 3894 * Push the beacon loss detection into the future since 3895 * we are processing a beacon from the AP just now. 3896 */ 3897 ieee80211_sta_reset_beacon_monitor(sdata); 3898 3899 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3900 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3901 len - baselen, false, &elems, 3902 care_about_ies, ncrc, 3903 mgmt->bssid, bssid); 3904 3905 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3906 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3907 if (local->hw.conf.dynamic_ps_timeout > 0) { 3908 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3909 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3910 ieee80211_hw_config(local, 3911 IEEE80211_CONF_CHANGE_PS); 3912 } 3913 ieee80211_send_nullfunc(local, sdata, false); 3914 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3915 local->pspolling = true; 3916 3917 /* 3918 * Here is assumed that the driver will be 3919 * able to send ps-poll frame and receive a 3920 * response even though power save mode is 3921 * enabled, but some drivers might require 3922 * to disable power save here. This needs 3923 * to be investigated. 3924 */ 3925 ieee80211_send_pspoll(local, sdata); 3926 } 3927 } 3928 3929 if (sdata->vif.p2p || 3930 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3931 struct ieee80211_p2p_noa_attr noa = {}; 3932 int ret; 3933 3934 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3935 len - baselen, 3936 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3937 (u8 *) &noa, sizeof(noa)); 3938 if (ret >= 2) { 3939 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3940 /* valid noa_attr and index changed */ 3941 sdata->u.mgd.p2p_noa_index = noa.index; 3942 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3943 changed |= BSS_CHANGED_P2P_PS; 3944 /* 3945 * make sure we update all information, the CRC 3946 * mechanism doesn't look at P2P attributes. 3947 */ 3948 ifmgd->beacon_crc_valid = false; 3949 } 3950 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3951 /* noa_attr not found and we had valid noa_attr before */ 3952 sdata->u.mgd.p2p_noa_index = -1; 3953 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3954 changed |= BSS_CHANGED_P2P_PS; 3955 ifmgd->beacon_crc_valid = false; 3956 } 3957 } 3958 3959 if (ifmgd->csa_waiting_bcn) 3960 ieee80211_chswitch_post_beacon(sdata); 3961 3962 /* 3963 * Update beacon timing and dtim count on every beacon appearance. This 3964 * will allow the driver to use the most updated values. Do it before 3965 * comparing this one with last received beacon. 3966 * IMPORTANT: These parameters would possibly be out of sync by the time 3967 * the driver will use them. The synchronized view is currently 3968 * guaranteed only in certain callbacks. 3969 */ 3970 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3971 sdata->vif.bss_conf.sync_tsf = 3972 le64_to_cpu(mgmt->u.beacon.timestamp); 3973 sdata->vif.bss_conf.sync_device_ts = 3974 rx_status->device_timestamp; 3975 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3976 } 3977 3978 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3979 return; 3980 ifmgd->beacon_crc = ncrc; 3981 ifmgd->beacon_crc_valid = true; 3982 3983 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3984 3985 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3986 rx_status->device_timestamp, 3987 &elems, true); 3988 3989 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3990 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3991 elems.wmm_param_len, 3992 elems.mu_edca_param_set)) 3993 changed |= BSS_CHANGED_QOS; 3994 3995 /* 3996 * If we haven't had a beacon before, tell the driver about the 3997 * DTIM period (and beacon timing if desired) now. 3998 */ 3999 if (!ifmgd->have_beacon) { 4000 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4001 bss_conf->dtim_period = elems.dtim_period ?: 1; 4002 4003 changed |= BSS_CHANGED_BEACON_INFO; 4004 ifmgd->have_beacon = true; 4005 4006 mutex_lock(&local->iflist_mtx); 4007 ieee80211_recalc_ps(local); 4008 mutex_unlock(&local->iflist_mtx); 4009 4010 ieee80211_recalc_ps_vif(sdata); 4011 } 4012 4013 if (elems.erp_info) { 4014 erp_valid = true; 4015 erp_value = elems.erp_info[0]; 4016 } else { 4017 erp_valid = false; 4018 } 4019 changed |= ieee80211_handle_bss_capability(sdata, 4020 le16_to_cpu(mgmt->u.beacon.capab_info), 4021 erp_valid, erp_value); 4022 4023 mutex_lock(&local->sta_mtx); 4024 sta = sta_info_get(sdata, bssid); 4025 4026 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4027 4028 if (ieee80211_config_bw(sdata, sta, 4029 elems.ht_cap_elem, elems.ht_operation, 4030 elems.vht_operation, elems.he_operation, 4031 bssid, &changed)) { 4032 mutex_unlock(&local->sta_mtx); 4033 sdata_info(sdata, 4034 "failed to follow AP %pM bandwidth change, disconnect\n", 4035 bssid); 4036 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4037 WLAN_REASON_DEAUTH_LEAVING, 4038 true, deauth_buf); 4039 ieee80211_report_disconnect(sdata, deauth_buf, 4040 sizeof(deauth_buf), true, 4041 WLAN_REASON_DEAUTH_LEAVING); 4042 return; 4043 } 4044 4045 if (sta && elems.opmode_notif) 4046 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4047 rx_status->band); 4048 mutex_unlock(&local->sta_mtx); 4049 4050 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4051 elems.country_elem, 4052 elems.country_elem_len, 4053 elems.pwr_constr_elem, 4054 elems.cisco_dtpc_elem); 4055 4056 ieee80211_bss_info_change_notify(sdata, changed); 4057 } 4058 4059 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4060 struct sk_buff *skb) 4061 { 4062 struct ieee80211_rx_status *rx_status; 4063 struct ieee80211_mgmt *mgmt; 4064 u16 fc; 4065 struct ieee802_11_elems elems; 4066 int ies_len; 4067 4068 rx_status = (struct ieee80211_rx_status *) skb->cb; 4069 mgmt = (struct ieee80211_mgmt *) skb->data; 4070 fc = le16_to_cpu(mgmt->frame_control); 4071 4072 sdata_lock(sdata); 4073 4074 switch (fc & IEEE80211_FCTL_STYPE) { 4075 case IEEE80211_STYPE_BEACON: 4076 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 4077 break; 4078 case IEEE80211_STYPE_PROBE_RESP: 4079 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4080 break; 4081 case IEEE80211_STYPE_AUTH: 4082 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4083 break; 4084 case IEEE80211_STYPE_DEAUTH: 4085 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4086 break; 4087 case IEEE80211_STYPE_DISASSOC: 4088 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4089 break; 4090 case IEEE80211_STYPE_ASSOC_RESP: 4091 case IEEE80211_STYPE_REASSOC_RESP: 4092 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4093 break; 4094 case IEEE80211_STYPE_ACTION: 4095 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4096 ies_len = skb->len - 4097 offsetof(struct ieee80211_mgmt, 4098 u.action.u.chan_switch.variable); 4099 4100 if (ies_len < 0) 4101 break; 4102 4103 /* CSA IE cannot be overridden, no need for BSSID */ 4104 ieee802_11_parse_elems( 4105 mgmt->u.action.u.chan_switch.variable, 4106 ies_len, true, &elems, mgmt->bssid, NULL); 4107 4108 if (elems.parse_error) 4109 break; 4110 4111 ieee80211_sta_process_chanswitch(sdata, 4112 rx_status->mactime, 4113 rx_status->device_timestamp, 4114 &elems, false); 4115 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4116 ies_len = skb->len - 4117 offsetof(struct ieee80211_mgmt, 4118 u.action.u.ext_chan_switch.variable); 4119 4120 if (ies_len < 0) 4121 break; 4122 4123 /* 4124 * extended CSA IE can't be overridden, no need for 4125 * BSSID 4126 */ 4127 ieee802_11_parse_elems( 4128 mgmt->u.action.u.ext_chan_switch.variable, 4129 ies_len, true, &elems, mgmt->bssid, NULL); 4130 4131 if (elems.parse_error) 4132 break; 4133 4134 /* for the handling code pretend this was also an IE */ 4135 elems.ext_chansw_ie = 4136 &mgmt->u.action.u.ext_chan_switch.data; 4137 4138 ieee80211_sta_process_chanswitch(sdata, 4139 rx_status->mactime, 4140 rx_status->device_timestamp, 4141 &elems, false); 4142 } 4143 break; 4144 } 4145 sdata_unlock(sdata); 4146 } 4147 4148 static void ieee80211_sta_timer(struct timer_list *t) 4149 { 4150 struct ieee80211_sub_if_data *sdata = 4151 from_timer(sdata, t, u.mgd.timer); 4152 4153 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4154 } 4155 4156 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4157 u8 *bssid, u8 reason, bool tx) 4158 { 4159 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4160 4161 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4162 tx, frame_buf); 4163 4164 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4165 reason); 4166 } 4167 4168 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4169 { 4170 struct ieee80211_local *local = sdata->local; 4171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4172 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4173 u32 tx_flags = 0; 4174 u16 trans = 1; 4175 u16 status = 0; 4176 u16 prepare_tx_duration = 0; 4177 4178 sdata_assert_lock(sdata); 4179 4180 if (WARN_ON_ONCE(!auth_data)) 4181 return -EINVAL; 4182 4183 auth_data->tries++; 4184 4185 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4186 sdata_info(sdata, "authentication with %pM timed out\n", 4187 auth_data->bss->bssid); 4188 4189 /* 4190 * Most likely AP is not in the range so remove the 4191 * bss struct for that AP. 4192 */ 4193 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4194 4195 return -ETIMEDOUT; 4196 } 4197 4198 if (auth_data->algorithm == WLAN_AUTH_SAE) 4199 prepare_tx_duration = 4200 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4201 4202 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4203 4204 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4205 auth_data->bss->bssid, auth_data->tries, 4206 IEEE80211_AUTH_MAX_TRIES); 4207 4208 auth_data->expected_transaction = 2; 4209 4210 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4211 trans = auth_data->sae_trans; 4212 status = auth_data->sae_status; 4213 auth_data->expected_transaction = trans; 4214 } 4215 4216 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4217 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4218 IEEE80211_TX_INTFL_MLME_CONN_TX; 4219 4220 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4221 auth_data->data, auth_data->data_len, 4222 auth_data->bss->bssid, 4223 auth_data->bss->bssid, NULL, 0, 0, 4224 tx_flags); 4225 4226 if (tx_flags == 0) { 4227 if (auth_data->algorithm == WLAN_AUTH_SAE) 4228 auth_data->timeout = jiffies + 4229 IEEE80211_AUTH_TIMEOUT_SAE; 4230 else 4231 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4232 } else { 4233 auth_data->timeout = 4234 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4235 } 4236 4237 auth_data->timeout_started = true; 4238 run_again(sdata, auth_data->timeout); 4239 4240 return 0; 4241 } 4242 4243 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4244 { 4245 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4246 struct ieee80211_local *local = sdata->local; 4247 4248 sdata_assert_lock(sdata); 4249 4250 assoc_data->tries++; 4251 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4252 sdata_info(sdata, "association with %pM timed out\n", 4253 assoc_data->bss->bssid); 4254 4255 /* 4256 * Most likely AP is not in the range so remove the 4257 * bss struct for that AP. 4258 */ 4259 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4260 4261 return -ETIMEDOUT; 4262 } 4263 4264 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4265 assoc_data->bss->bssid, assoc_data->tries, 4266 IEEE80211_ASSOC_MAX_TRIES); 4267 ieee80211_send_assoc(sdata); 4268 4269 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4270 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4271 assoc_data->timeout_started = true; 4272 run_again(sdata, assoc_data->timeout); 4273 } else { 4274 assoc_data->timeout = 4275 round_jiffies_up(jiffies + 4276 IEEE80211_ASSOC_TIMEOUT_LONG); 4277 assoc_data->timeout_started = true; 4278 run_again(sdata, assoc_data->timeout); 4279 } 4280 4281 return 0; 4282 } 4283 4284 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4285 __le16 fc, bool acked) 4286 { 4287 struct ieee80211_local *local = sdata->local; 4288 4289 sdata->u.mgd.status_fc = fc; 4290 sdata->u.mgd.status_acked = acked; 4291 sdata->u.mgd.status_received = true; 4292 4293 ieee80211_queue_work(&local->hw, &sdata->work); 4294 } 4295 4296 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4297 { 4298 struct ieee80211_local *local = sdata->local; 4299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4300 4301 sdata_lock(sdata); 4302 4303 if (ifmgd->status_received) { 4304 __le16 fc = ifmgd->status_fc; 4305 bool status_acked = ifmgd->status_acked; 4306 4307 ifmgd->status_received = false; 4308 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4309 if (status_acked) { 4310 if (ifmgd->auth_data->algorithm == 4311 WLAN_AUTH_SAE) 4312 ifmgd->auth_data->timeout = 4313 jiffies + 4314 IEEE80211_AUTH_TIMEOUT_SAE; 4315 else 4316 ifmgd->auth_data->timeout = 4317 jiffies + 4318 IEEE80211_AUTH_TIMEOUT_SHORT; 4319 run_again(sdata, ifmgd->auth_data->timeout); 4320 } else { 4321 ifmgd->auth_data->timeout = jiffies - 1; 4322 } 4323 ifmgd->auth_data->timeout_started = true; 4324 } else if (ifmgd->assoc_data && 4325 (ieee80211_is_assoc_req(fc) || 4326 ieee80211_is_reassoc_req(fc))) { 4327 if (status_acked) { 4328 ifmgd->assoc_data->timeout = 4329 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4330 run_again(sdata, ifmgd->assoc_data->timeout); 4331 } else { 4332 ifmgd->assoc_data->timeout = jiffies - 1; 4333 } 4334 ifmgd->assoc_data->timeout_started = true; 4335 } 4336 } 4337 4338 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4339 time_after(jiffies, ifmgd->auth_data->timeout)) { 4340 if (ifmgd->auth_data->done) { 4341 /* 4342 * ok ... we waited for assoc but userspace didn't, 4343 * so let's just kill the auth data 4344 */ 4345 ieee80211_destroy_auth_data(sdata, false); 4346 } else if (ieee80211_auth(sdata)) { 4347 u8 bssid[ETH_ALEN]; 4348 struct ieee80211_event event = { 4349 .type = MLME_EVENT, 4350 .u.mlme.data = AUTH_EVENT, 4351 .u.mlme.status = MLME_TIMEOUT, 4352 }; 4353 4354 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4355 4356 ieee80211_destroy_auth_data(sdata, false); 4357 4358 cfg80211_auth_timeout(sdata->dev, bssid); 4359 drv_event_callback(sdata->local, sdata, &event); 4360 } 4361 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4362 run_again(sdata, ifmgd->auth_data->timeout); 4363 4364 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4365 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4366 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4367 ieee80211_do_assoc(sdata)) { 4368 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4369 struct ieee80211_event event = { 4370 .type = MLME_EVENT, 4371 .u.mlme.data = ASSOC_EVENT, 4372 .u.mlme.status = MLME_TIMEOUT, 4373 }; 4374 4375 ieee80211_destroy_assoc_data(sdata, false, false); 4376 cfg80211_assoc_timeout(sdata->dev, bss); 4377 drv_event_callback(sdata->local, sdata, &event); 4378 } 4379 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4380 run_again(sdata, ifmgd->assoc_data->timeout); 4381 4382 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4383 ifmgd->associated) { 4384 u8 bssid[ETH_ALEN]; 4385 int max_tries; 4386 4387 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4388 4389 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4390 max_tries = max_nullfunc_tries; 4391 else 4392 max_tries = max_probe_tries; 4393 4394 /* ACK received for nullfunc probing frame */ 4395 if (!ifmgd->probe_send_count) 4396 ieee80211_reset_ap_probe(sdata); 4397 else if (ifmgd->nullfunc_failed) { 4398 if (ifmgd->probe_send_count < max_tries) { 4399 mlme_dbg(sdata, 4400 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4401 bssid, ifmgd->probe_send_count, 4402 max_tries); 4403 ieee80211_mgd_probe_ap_send(sdata); 4404 } else { 4405 mlme_dbg(sdata, 4406 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4407 bssid); 4408 ieee80211_sta_connection_lost(sdata, bssid, 4409 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4410 false); 4411 } 4412 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4413 run_again(sdata, ifmgd->probe_timeout); 4414 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4415 mlme_dbg(sdata, 4416 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4417 bssid, probe_wait_ms); 4418 ieee80211_sta_connection_lost(sdata, bssid, 4419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4420 } else if (ifmgd->probe_send_count < max_tries) { 4421 mlme_dbg(sdata, 4422 "No probe response from AP %pM after %dms, try %d/%i\n", 4423 bssid, probe_wait_ms, 4424 ifmgd->probe_send_count, max_tries); 4425 ieee80211_mgd_probe_ap_send(sdata); 4426 } else { 4427 /* 4428 * We actually lost the connection ... or did we? 4429 * Let's make sure! 4430 */ 4431 mlme_dbg(sdata, 4432 "No probe response from AP %pM after %dms, disconnecting.\n", 4433 bssid, probe_wait_ms); 4434 4435 ieee80211_sta_connection_lost(sdata, bssid, 4436 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4437 } 4438 } 4439 4440 sdata_unlock(sdata); 4441 } 4442 4443 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4444 { 4445 struct ieee80211_sub_if_data *sdata = 4446 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4447 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4448 4449 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4450 return; 4451 4452 sdata->u.mgd.connection_loss = false; 4453 ieee80211_queue_work(&sdata->local->hw, 4454 &sdata->u.mgd.beacon_connection_loss_work); 4455 } 4456 4457 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4458 { 4459 struct ieee80211_sub_if_data *sdata = 4460 from_timer(sdata, t, u.mgd.conn_mon_timer); 4461 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4462 struct ieee80211_local *local = sdata->local; 4463 4464 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4465 return; 4466 4467 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4468 } 4469 4470 static void ieee80211_sta_monitor_work(struct work_struct *work) 4471 { 4472 struct ieee80211_sub_if_data *sdata = 4473 container_of(work, struct ieee80211_sub_if_data, 4474 u.mgd.monitor_work); 4475 4476 ieee80211_mgd_probe_ap(sdata, false); 4477 } 4478 4479 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4480 { 4481 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4482 __ieee80211_stop_poll(sdata); 4483 4484 /* let's probe the connection once */ 4485 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4486 ieee80211_queue_work(&sdata->local->hw, 4487 &sdata->u.mgd.monitor_work); 4488 } 4489 } 4490 4491 #ifdef CONFIG_PM 4492 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4493 { 4494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4495 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4496 4497 sdata_lock(sdata); 4498 4499 if (ifmgd->auth_data || ifmgd->assoc_data) { 4500 const u8 *bssid = ifmgd->auth_data ? 4501 ifmgd->auth_data->bss->bssid : 4502 ifmgd->assoc_data->bss->bssid; 4503 4504 /* 4505 * If we are trying to authenticate / associate while suspending, 4506 * cfg80211 won't know and won't actually abort those attempts, 4507 * thus we need to do that ourselves. 4508 */ 4509 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4510 IEEE80211_STYPE_DEAUTH, 4511 WLAN_REASON_DEAUTH_LEAVING, 4512 false, frame_buf); 4513 if (ifmgd->assoc_data) 4514 ieee80211_destroy_assoc_data(sdata, false, true); 4515 if (ifmgd->auth_data) 4516 ieee80211_destroy_auth_data(sdata, false); 4517 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4518 IEEE80211_DEAUTH_FRAME_LEN); 4519 } 4520 4521 /* This is a bit of a hack - we should find a better and more generic 4522 * solution to this. Normally when suspending, cfg80211 will in fact 4523 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4524 * auth (not so important) or assoc (this is the problem) process. 4525 * 4526 * As a consequence, it can happen that we are in the process of both 4527 * associating and suspending, and receive an association response 4528 * after cfg80211 has checked if it needs to disconnect, but before 4529 * we actually set the flag to drop incoming frames. This will then 4530 * cause the workqueue flush to process the association response in 4531 * the suspend, resulting in a successful association just before it 4532 * tries to remove the interface from the driver, which now though 4533 * has a channel context assigned ... this results in issues. 4534 * 4535 * To work around this (for now) simply deauth here again if we're 4536 * now connected. 4537 */ 4538 if (ifmgd->associated && !sdata->local->wowlan) { 4539 u8 bssid[ETH_ALEN]; 4540 struct cfg80211_deauth_request req = { 4541 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4542 .bssid = bssid, 4543 }; 4544 4545 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4546 ieee80211_mgd_deauth(sdata, &req); 4547 } 4548 4549 sdata_unlock(sdata); 4550 } 4551 4552 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4553 { 4554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4555 4556 sdata_lock(sdata); 4557 if (!ifmgd->associated) { 4558 sdata_unlock(sdata); 4559 return; 4560 } 4561 4562 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4563 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4564 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4565 ieee80211_sta_connection_lost(sdata, 4566 ifmgd->associated->bssid, 4567 WLAN_REASON_UNSPECIFIED, 4568 true); 4569 sdata_unlock(sdata); 4570 return; 4571 } 4572 sdata_unlock(sdata); 4573 } 4574 #endif 4575 4576 /* interface setup */ 4577 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4578 { 4579 struct ieee80211_if_managed *ifmgd; 4580 4581 ifmgd = &sdata->u.mgd; 4582 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4583 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4584 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4585 ieee80211_beacon_connection_loss_work); 4586 INIT_WORK(&ifmgd->csa_connection_drop_work, 4587 ieee80211_csa_connection_drop_work); 4588 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4589 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4590 ieee80211_tdls_peer_del_work); 4591 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4592 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4593 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4594 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4595 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4596 ieee80211_sta_handle_tspec_ac_params_wk); 4597 4598 ifmgd->flags = 0; 4599 ifmgd->powersave = sdata->wdev.ps; 4600 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4601 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4602 ifmgd->p2p_noa_index = -1; 4603 4604 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4605 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4606 else 4607 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4608 4609 /* Setup TDLS data */ 4610 spin_lock_init(&ifmgd->teardown_lock); 4611 ifmgd->teardown_skb = NULL; 4612 ifmgd->orig_teardown_skb = NULL; 4613 } 4614 4615 /* scan finished notification */ 4616 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4617 { 4618 struct ieee80211_sub_if_data *sdata; 4619 4620 /* Restart STA timers */ 4621 rcu_read_lock(); 4622 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4623 if (ieee80211_sdata_running(sdata)) 4624 ieee80211_restart_sta_timer(sdata); 4625 } 4626 rcu_read_unlock(); 4627 } 4628 4629 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4630 struct cfg80211_bss *cbss) 4631 { 4632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4633 const u8 *ht_cap_ie, *vht_cap_ie; 4634 const struct ieee80211_ht_cap *ht_cap; 4635 const struct ieee80211_vht_cap *vht_cap; 4636 u8 chains = 1; 4637 4638 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4639 return chains; 4640 4641 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4642 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4643 ht_cap = (void *)(ht_cap_ie + 2); 4644 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4645 /* 4646 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4647 * "Tx Unequal Modulation Supported" fields. 4648 */ 4649 } 4650 4651 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4652 return chains; 4653 4654 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4655 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4656 u8 nss; 4657 u16 tx_mcs_map; 4658 4659 vht_cap = (void *)(vht_cap_ie + 2); 4660 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4661 for (nss = 8; nss > 0; nss--) { 4662 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4663 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4664 break; 4665 } 4666 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4667 chains = max(chains, nss); 4668 } 4669 4670 return chains; 4671 } 4672 4673 static bool 4674 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4675 const struct ieee80211_he_operation *he_op) 4676 { 4677 const struct ieee80211_sta_he_cap *sta_he_cap = 4678 ieee80211_get_he_sta_cap(sband); 4679 u16 ap_min_req_set; 4680 int i; 4681 4682 if (!sta_he_cap || !he_op) 4683 return false; 4684 4685 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4686 4687 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4688 for (i = 0; i < 3; i++) { 4689 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4690 &sta_he_cap->he_mcs_nss_supp; 4691 u16 sta_mcs_map_rx = 4692 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4693 u16 sta_mcs_map_tx = 4694 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4695 u8 nss; 4696 bool verified = true; 4697 4698 /* 4699 * For each band there is a maximum of 8 spatial streams 4700 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4701 * of 2 bits per NSS (1-8), with the values defined in enum 4702 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4703 * capabilities aren't less than the AP's minimum requirements 4704 * for this HE BSS per SS. 4705 * It is enough to find one such band that meets the reqs. 4706 */ 4707 for (nss = 8; nss > 0; nss--) { 4708 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4709 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4710 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4711 4712 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4713 continue; 4714 4715 /* 4716 * Make sure the HE AP doesn't require MCSs that aren't 4717 * supported by the client 4718 */ 4719 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4720 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4721 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4722 verified = false; 4723 break; 4724 } 4725 } 4726 4727 if (verified) 4728 return true; 4729 } 4730 4731 /* If here, STA doesn't meet AP's HE min requirements */ 4732 return false; 4733 } 4734 4735 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4736 struct cfg80211_bss *cbss) 4737 { 4738 struct ieee80211_local *local = sdata->local; 4739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4740 const struct ieee80211_ht_cap *ht_cap = NULL; 4741 const struct ieee80211_ht_operation *ht_oper = NULL; 4742 const struct ieee80211_vht_operation *vht_oper = NULL; 4743 const struct ieee80211_he_operation *he_oper = NULL; 4744 struct ieee80211_supported_band *sband; 4745 struct cfg80211_chan_def chandef; 4746 int ret; 4747 u32 i; 4748 bool have_80mhz; 4749 4750 sband = local->hw.wiphy->bands[cbss->channel->band]; 4751 4752 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4753 IEEE80211_STA_DISABLE_80P80MHZ | 4754 IEEE80211_STA_DISABLE_160MHZ); 4755 4756 rcu_read_lock(); 4757 4758 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4759 sband->ht_cap.ht_supported) { 4760 const u8 *ht_oper_ie, *ht_cap_ie; 4761 4762 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4763 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4764 ht_oper = (void *)(ht_oper_ie + 2); 4765 4766 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4767 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4768 ht_cap = (void *)(ht_cap_ie + 2); 4769 4770 if (!ht_cap) { 4771 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4772 ht_oper = NULL; 4773 } 4774 } 4775 4776 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4777 sband->vht_cap.vht_supported) { 4778 const u8 *vht_oper_ie, *vht_cap; 4779 4780 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4781 WLAN_EID_VHT_OPERATION); 4782 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4783 vht_oper = (void *)(vht_oper_ie + 2); 4784 if (vht_oper && !ht_oper) { 4785 vht_oper = NULL; 4786 sdata_info(sdata, 4787 "AP advertised VHT without HT, disabling both\n"); 4788 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4789 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4790 } 4791 4792 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4793 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4794 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4795 vht_oper = NULL; 4796 } 4797 } 4798 4799 if (!ieee80211_get_he_sta_cap(sband)) 4800 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4801 4802 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 4803 const struct cfg80211_bss_ies *ies; 4804 const u8 *he_oper_ie; 4805 4806 ies = rcu_dereference(cbss->ies); 4807 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4808 ies->data, ies->len); 4809 if (he_oper_ie && 4810 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4811 he_oper = (void *)(he_oper_ie + 3); 4812 else 4813 he_oper = NULL; 4814 4815 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4816 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4817 } 4818 4819 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4820 have_80mhz = false; 4821 for (i = 0; i < sband->n_channels; i++) { 4822 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4823 IEEE80211_CHAN_NO_80MHZ)) 4824 continue; 4825 4826 have_80mhz = true; 4827 break; 4828 } 4829 4830 if (!have_80mhz) 4831 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4832 4833 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4834 cbss->channel, 4835 ht_oper, vht_oper, he_oper, 4836 &chandef, false); 4837 4838 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4839 local->rx_chains); 4840 4841 rcu_read_unlock(); 4842 4843 /* will change later if needed */ 4844 sdata->smps_mode = IEEE80211_SMPS_OFF; 4845 4846 mutex_lock(&local->mtx); 4847 /* 4848 * If this fails (possibly due to channel context sharing 4849 * on incompatible channels, e.g. 80+80 and 160 sharing the 4850 * same control channel) try to use a smaller bandwidth. 4851 */ 4852 ret = ieee80211_vif_use_channel(sdata, &chandef, 4853 IEEE80211_CHANCTX_SHARED); 4854 4855 /* don't downgrade for 5 and 10 MHz channels, though. */ 4856 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4857 chandef.width == NL80211_CHAN_WIDTH_10) 4858 goto out; 4859 4860 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4861 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4862 ret = ieee80211_vif_use_channel(sdata, &chandef, 4863 IEEE80211_CHANCTX_SHARED); 4864 } 4865 out: 4866 mutex_unlock(&local->mtx); 4867 return ret; 4868 } 4869 4870 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4871 u8 *dtim_count, u8 *dtim_period) 4872 { 4873 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4874 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4875 ies->len); 4876 const struct ieee80211_tim_ie *tim = NULL; 4877 const struct ieee80211_bssid_index *idx; 4878 bool valid = tim_ie && tim_ie[1] >= 2; 4879 4880 if (valid) 4881 tim = (void *)(tim_ie + 2); 4882 4883 if (dtim_count) 4884 *dtim_count = valid ? tim->dtim_count : 0; 4885 4886 if (dtim_period) 4887 *dtim_period = valid ? tim->dtim_period : 0; 4888 4889 /* Check if value is overridden by non-transmitted profile */ 4890 if (!idx_ie || idx_ie[1] < 3) 4891 return valid; 4892 4893 idx = (void *)(idx_ie + 2); 4894 4895 if (dtim_count) 4896 *dtim_count = idx->dtim_count; 4897 4898 if (dtim_period) 4899 *dtim_period = idx->dtim_period; 4900 4901 return true; 4902 } 4903 4904 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4905 struct cfg80211_bss *cbss, bool assoc, 4906 bool override) 4907 { 4908 struct ieee80211_local *local = sdata->local; 4909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4910 struct ieee80211_bss *bss = (void *)cbss->priv; 4911 struct sta_info *new_sta = NULL; 4912 struct ieee80211_supported_band *sband; 4913 bool have_sta = false; 4914 int err; 4915 4916 sband = local->hw.wiphy->bands[cbss->channel->band]; 4917 4918 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4919 return -EINVAL; 4920 4921 /* If a reconfig is happening, bail out */ 4922 if (local->in_reconfig) 4923 return -EBUSY; 4924 4925 if (assoc) { 4926 rcu_read_lock(); 4927 have_sta = sta_info_get(sdata, cbss->bssid); 4928 rcu_read_unlock(); 4929 } 4930 4931 if (!have_sta) { 4932 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4933 if (!new_sta) 4934 return -ENOMEM; 4935 } 4936 4937 /* 4938 * Set up the information for the new channel before setting the 4939 * new channel. We can't - completely race-free - change the basic 4940 * rates bitmap and the channel (sband) that it refers to, but if 4941 * we set it up before we at least avoid calling into the driver's 4942 * bss_info_changed() method with invalid information (since we do 4943 * call that from changing the channel - only for IDLE and perhaps 4944 * some others, but ...). 4945 * 4946 * So to avoid that, just set up all the new information before the 4947 * channel, but tell the driver to apply it only afterwards, since 4948 * it might need the new channel for that. 4949 */ 4950 if (new_sta) { 4951 u32 rates = 0, basic_rates = 0; 4952 bool have_higher_than_11mbit; 4953 int min_rate = INT_MAX, min_rate_index = -1; 4954 const struct cfg80211_bss_ies *ies; 4955 int shift = ieee80211_vif_get_shift(&sdata->vif); 4956 4957 ieee80211_get_rates(sband, bss->supp_rates, 4958 bss->supp_rates_len, 4959 &rates, &basic_rates, 4960 &have_higher_than_11mbit, 4961 &min_rate, &min_rate_index, 4962 shift); 4963 4964 /* 4965 * This used to be a workaround for basic rates missing 4966 * in the association response frame. Now that we no 4967 * longer use the basic rates from there, it probably 4968 * doesn't happen any more, but keep the workaround so 4969 * in case some *other* APs are buggy in different ways 4970 * we can connect -- with a warning. 4971 */ 4972 if (!basic_rates && min_rate_index >= 0) { 4973 sdata_info(sdata, 4974 "No basic rates, using min rate instead\n"); 4975 basic_rates = BIT(min_rate_index); 4976 } 4977 4978 if (rates) 4979 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4980 else 4981 sdata_info(sdata, 4982 "No rates found, keeping mandatory only\n"); 4983 4984 sdata->vif.bss_conf.basic_rates = basic_rates; 4985 4986 /* cf. IEEE 802.11 9.2.12 */ 4987 if (cbss->channel->band == NL80211_BAND_2GHZ && 4988 have_higher_than_11mbit) 4989 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4990 else 4991 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4992 4993 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4994 4995 /* set timing information */ 4996 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4997 rcu_read_lock(); 4998 ies = rcu_dereference(cbss->beacon_ies); 4999 if (ies) { 5000 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5001 sdata->vif.bss_conf.sync_device_ts = 5002 bss->device_ts_beacon; 5003 5004 ieee80211_get_dtim(ies, 5005 &sdata->vif.bss_conf.sync_dtim_count, 5006 NULL); 5007 } else if (!ieee80211_hw_check(&sdata->local->hw, 5008 TIMING_BEACON_ONLY)) { 5009 ies = rcu_dereference(cbss->proberesp_ies); 5010 /* must be non-NULL since beacon IEs were NULL */ 5011 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5012 sdata->vif.bss_conf.sync_device_ts = 5013 bss->device_ts_presp; 5014 sdata->vif.bss_conf.sync_dtim_count = 0; 5015 } else { 5016 sdata->vif.bss_conf.sync_tsf = 0; 5017 sdata->vif.bss_conf.sync_device_ts = 0; 5018 sdata->vif.bss_conf.sync_dtim_count = 0; 5019 } 5020 rcu_read_unlock(); 5021 } 5022 5023 if (new_sta || override) { 5024 err = ieee80211_prep_channel(sdata, cbss); 5025 if (err) { 5026 if (new_sta) 5027 sta_info_free(local, new_sta); 5028 return -EINVAL; 5029 } 5030 } 5031 5032 if (new_sta) { 5033 /* 5034 * tell driver about BSSID, basic rates and timing 5035 * this was set up above, before setting the channel 5036 */ 5037 ieee80211_bss_info_change_notify(sdata, 5038 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5039 BSS_CHANGED_BEACON_INT); 5040 5041 if (assoc) 5042 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5043 5044 err = sta_info_insert(new_sta); 5045 new_sta = NULL; 5046 if (err) { 5047 sdata_info(sdata, 5048 "failed to insert STA entry for the AP (error %d)\n", 5049 err); 5050 return err; 5051 } 5052 } else 5053 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5054 5055 /* Cancel scan to ensure that nothing interferes with connection */ 5056 if (local->scanning) 5057 ieee80211_scan_cancel(local); 5058 5059 return 0; 5060 } 5061 5062 /* config hooks */ 5063 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5064 struct cfg80211_auth_request *req) 5065 { 5066 struct ieee80211_local *local = sdata->local; 5067 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5068 struct ieee80211_mgd_auth_data *auth_data; 5069 u16 auth_alg; 5070 int err; 5071 bool cont_auth; 5072 5073 /* prepare auth data structure */ 5074 5075 switch (req->auth_type) { 5076 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5077 auth_alg = WLAN_AUTH_OPEN; 5078 break; 5079 case NL80211_AUTHTYPE_SHARED_KEY: 5080 if (fips_enabled) 5081 return -EOPNOTSUPP; 5082 auth_alg = WLAN_AUTH_SHARED_KEY; 5083 break; 5084 case NL80211_AUTHTYPE_FT: 5085 auth_alg = WLAN_AUTH_FT; 5086 break; 5087 case NL80211_AUTHTYPE_NETWORK_EAP: 5088 auth_alg = WLAN_AUTH_LEAP; 5089 break; 5090 case NL80211_AUTHTYPE_SAE: 5091 auth_alg = WLAN_AUTH_SAE; 5092 break; 5093 case NL80211_AUTHTYPE_FILS_SK: 5094 auth_alg = WLAN_AUTH_FILS_SK; 5095 break; 5096 case NL80211_AUTHTYPE_FILS_SK_PFS: 5097 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5098 break; 5099 case NL80211_AUTHTYPE_FILS_PK: 5100 auth_alg = WLAN_AUTH_FILS_PK; 5101 break; 5102 default: 5103 return -EOPNOTSUPP; 5104 } 5105 5106 if (ifmgd->assoc_data) 5107 return -EBUSY; 5108 5109 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5110 req->ie_len, GFP_KERNEL); 5111 if (!auth_data) 5112 return -ENOMEM; 5113 5114 auth_data->bss = req->bss; 5115 5116 if (req->auth_data_len >= 4) { 5117 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5118 __le16 *pos = (__le16 *) req->auth_data; 5119 5120 auth_data->sae_trans = le16_to_cpu(pos[0]); 5121 auth_data->sae_status = le16_to_cpu(pos[1]); 5122 } 5123 memcpy(auth_data->data, req->auth_data + 4, 5124 req->auth_data_len - 4); 5125 auth_data->data_len += req->auth_data_len - 4; 5126 } 5127 5128 /* Check if continuing authentication or trying to authenticate with the 5129 * same BSS that we were in the process of authenticating with and avoid 5130 * removal and re-addition of the STA entry in 5131 * ieee80211_prep_connection(). 5132 */ 5133 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5134 5135 if (req->ie && req->ie_len) { 5136 memcpy(&auth_data->data[auth_data->data_len], 5137 req->ie, req->ie_len); 5138 auth_data->data_len += req->ie_len; 5139 } 5140 5141 if (req->key && req->key_len) { 5142 auth_data->key_len = req->key_len; 5143 auth_data->key_idx = req->key_idx; 5144 memcpy(auth_data->key, req->key, req->key_len); 5145 } 5146 5147 auth_data->algorithm = auth_alg; 5148 5149 /* try to authenticate/probe */ 5150 5151 if (ifmgd->auth_data) { 5152 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5153 auth_data->peer_confirmed = 5154 ifmgd->auth_data->peer_confirmed; 5155 } 5156 ieee80211_destroy_auth_data(sdata, cont_auth); 5157 } 5158 5159 /* prep auth_data so we don't go into idle on disassoc */ 5160 ifmgd->auth_data = auth_data; 5161 5162 /* If this is continuation of an ongoing SAE authentication exchange 5163 * (i.e., request to send SAE Confirm) and the peer has already 5164 * confirmed, mark authentication completed since we are about to send 5165 * out SAE Confirm. 5166 */ 5167 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5168 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5169 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5170 5171 if (ifmgd->associated) { 5172 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5173 5174 sdata_info(sdata, 5175 "disconnect from AP %pM for new auth to %pM\n", 5176 ifmgd->associated->bssid, req->bss->bssid); 5177 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5178 WLAN_REASON_UNSPECIFIED, 5179 false, frame_buf); 5180 5181 ieee80211_report_disconnect(sdata, frame_buf, 5182 sizeof(frame_buf), true, 5183 WLAN_REASON_UNSPECIFIED); 5184 } 5185 5186 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5187 5188 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5189 if (err) 5190 goto err_clear; 5191 5192 err = ieee80211_auth(sdata); 5193 if (err) { 5194 sta_info_destroy_addr(sdata, req->bss->bssid); 5195 goto err_clear; 5196 } 5197 5198 /* hold our own reference */ 5199 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5200 return 0; 5201 5202 err_clear: 5203 eth_zero_addr(ifmgd->bssid); 5204 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5205 ifmgd->auth_data = NULL; 5206 mutex_lock(&sdata->local->mtx); 5207 ieee80211_vif_release_channel(sdata); 5208 mutex_unlock(&sdata->local->mtx); 5209 kfree(auth_data); 5210 return err; 5211 } 5212 5213 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5214 struct cfg80211_assoc_request *req) 5215 { 5216 struct ieee80211_local *local = sdata->local; 5217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5218 struct ieee80211_bss *bss = (void *)req->bss->priv; 5219 struct ieee80211_mgd_assoc_data *assoc_data; 5220 const struct cfg80211_bss_ies *beacon_ies; 5221 struct ieee80211_supported_band *sband; 5222 const u8 *ssidie, *ht_ie, *vht_ie; 5223 int i, err; 5224 bool override = false; 5225 5226 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5227 if (!assoc_data) 5228 return -ENOMEM; 5229 5230 rcu_read_lock(); 5231 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5232 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5233 rcu_read_unlock(); 5234 kfree(assoc_data); 5235 return -EINVAL; 5236 } 5237 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5238 assoc_data->ssid_len = ssidie[1]; 5239 rcu_read_unlock(); 5240 5241 if (ifmgd->associated) { 5242 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5243 5244 sdata_info(sdata, 5245 "disconnect from AP %pM for new assoc to %pM\n", 5246 ifmgd->associated->bssid, req->bss->bssid); 5247 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5248 WLAN_REASON_UNSPECIFIED, 5249 false, frame_buf); 5250 5251 ieee80211_report_disconnect(sdata, frame_buf, 5252 sizeof(frame_buf), true, 5253 WLAN_REASON_UNSPECIFIED); 5254 } 5255 5256 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5257 err = -EBUSY; 5258 goto err_free; 5259 } 5260 5261 if (ifmgd->assoc_data) { 5262 err = -EBUSY; 5263 goto err_free; 5264 } 5265 5266 if (ifmgd->auth_data) { 5267 bool match; 5268 5269 /* keep sta info, bssid if matching */ 5270 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5271 ieee80211_destroy_auth_data(sdata, match); 5272 } 5273 5274 /* prepare assoc data */ 5275 5276 ifmgd->beacon_crc_valid = false; 5277 5278 assoc_data->wmm = bss->wmm_used && 5279 (local->hw.queues >= IEEE80211_NUM_ACS); 5280 5281 /* 5282 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5283 * We still associate in non-HT mode (11a/b/g) if any one of these 5284 * ciphers is configured as pairwise. 5285 * We can set this to true for non-11n hardware, that'll be checked 5286 * separately along with the peer capabilities. 5287 */ 5288 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5289 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5290 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5291 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5292 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5293 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5294 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5295 netdev_info(sdata->dev, 5296 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5297 } 5298 } 5299 5300 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5301 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5302 if (!sband->ht_cap.ht_supported || 5303 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5304 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5305 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5306 if (!bss->wmm_used && 5307 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5308 netdev_info(sdata->dev, 5309 "disabling HT as WMM/QoS is not supported by the AP\n"); 5310 } 5311 5312 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5313 if (!sband->vht_cap.vht_supported || 5314 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5315 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5316 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5317 if (!bss->wmm_used && 5318 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5319 netdev_info(sdata->dev, 5320 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5321 } 5322 5323 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5324 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5325 sizeof(ifmgd->ht_capa_mask)); 5326 5327 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5328 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5329 sizeof(ifmgd->vht_capa_mask)); 5330 5331 if (req->ie && req->ie_len) { 5332 memcpy(assoc_data->ie, req->ie, req->ie_len); 5333 assoc_data->ie_len = req->ie_len; 5334 } 5335 5336 if (req->fils_kek) { 5337 /* should already be checked in cfg80211 - so warn */ 5338 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5339 err = -EINVAL; 5340 goto err_free; 5341 } 5342 memcpy(assoc_data->fils_kek, req->fils_kek, 5343 req->fils_kek_len); 5344 assoc_data->fils_kek_len = req->fils_kek_len; 5345 } 5346 5347 if (req->fils_nonces) 5348 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5349 2 * FILS_NONCE_LEN); 5350 5351 assoc_data->bss = req->bss; 5352 5353 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5354 if (ifmgd->powersave) 5355 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5356 else 5357 sdata->smps_mode = IEEE80211_SMPS_OFF; 5358 } else 5359 sdata->smps_mode = ifmgd->req_smps; 5360 5361 assoc_data->capability = req->bss->capability; 5362 assoc_data->supp_rates = bss->supp_rates; 5363 assoc_data->supp_rates_len = bss->supp_rates_len; 5364 5365 rcu_read_lock(); 5366 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5367 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5368 assoc_data->ap_ht_param = 5369 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5370 else 5371 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5372 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5373 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5374 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5375 sizeof(struct ieee80211_vht_cap)); 5376 else 5377 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5378 rcu_read_unlock(); 5379 5380 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5381 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5382 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5383 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5384 5385 if (bss->wmm_used && bss->uapsd_supported && 5386 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5387 assoc_data->uapsd = true; 5388 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5389 } else { 5390 assoc_data->uapsd = false; 5391 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5392 } 5393 5394 if (req->prev_bssid) 5395 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5396 5397 if (req->use_mfp) { 5398 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5399 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5400 } else { 5401 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5402 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5403 } 5404 5405 if (req->flags & ASSOC_REQ_USE_RRM) 5406 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5407 else 5408 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5409 5410 if (req->crypto.control_port) 5411 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5412 else 5413 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5414 5415 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5416 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5417 sdata->control_port_over_nl80211 = 5418 req->crypto.control_port_over_nl80211; 5419 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5420 sdata->vif.type); 5421 5422 /* kick off associate process */ 5423 5424 ifmgd->assoc_data = assoc_data; 5425 ifmgd->dtim_period = 0; 5426 ifmgd->have_beacon = false; 5427 5428 /* override HT/VHT configuration only if the AP and we support it */ 5429 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5430 struct ieee80211_sta_ht_cap sta_ht_cap; 5431 5432 if (req->flags & ASSOC_REQ_DISABLE_HT) 5433 override = true; 5434 5435 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5436 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5437 5438 /* check for 40 MHz disable override */ 5439 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5440 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5441 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5442 override = true; 5443 5444 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5445 req->flags & ASSOC_REQ_DISABLE_VHT) 5446 override = true; 5447 } 5448 5449 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5450 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5451 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5452 } 5453 5454 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5455 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5456 5457 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5458 if (err) 5459 goto err_clear; 5460 5461 rcu_read_lock(); 5462 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5463 5464 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5465 !beacon_ies) { 5466 /* 5467 * Wait up to one beacon interval ... 5468 * should this be more if we miss one? 5469 */ 5470 sdata_info(sdata, "waiting for beacon from %pM\n", 5471 ifmgd->bssid); 5472 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5473 assoc_data->timeout_started = true; 5474 assoc_data->need_beacon = true; 5475 } else if (beacon_ies) { 5476 const u8 *ie; 5477 u8 dtim_count = 0; 5478 5479 ieee80211_get_dtim(beacon_ies, &dtim_count, 5480 &ifmgd->dtim_period); 5481 5482 ifmgd->have_beacon = true; 5483 assoc_data->timeout = jiffies; 5484 assoc_data->timeout_started = true; 5485 5486 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5487 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5488 sdata->vif.bss_conf.sync_device_ts = 5489 bss->device_ts_beacon; 5490 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5491 } 5492 5493 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5494 beacon_ies->data, beacon_ies->len); 5495 if (ie && ie[1] >= 3) 5496 sdata->vif.bss_conf.profile_periodicity = ie[4]; 5497 5498 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, 5499 beacon_ies->data, beacon_ies->len); 5500 if (ie && ie[1] >= 11 && 5501 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5502 sdata->vif.bss_conf.ema_ap = true; 5503 } else { 5504 assoc_data->timeout = jiffies; 5505 assoc_data->timeout_started = true; 5506 } 5507 rcu_read_unlock(); 5508 5509 run_again(sdata, assoc_data->timeout); 5510 5511 if (bss->corrupt_data) { 5512 char *corrupt_type = "data"; 5513 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5514 if (bss->corrupt_data & 5515 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5516 corrupt_type = "beacon and probe response"; 5517 else 5518 corrupt_type = "beacon"; 5519 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5520 corrupt_type = "probe response"; 5521 sdata_info(sdata, "associating with AP with corrupt %s\n", 5522 corrupt_type); 5523 } 5524 5525 return 0; 5526 err_clear: 5527 eth_zero_addr(ifmgd->bssid); 5528 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5529 ifmgd->assoc_data = NULL; 5530 err_free: 5531 kfree(assoc_data); 5532 return err; 5533 } 5534 5535 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5536 struct cfg80211_deauth_request *req) 5537 { 5538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5539 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5540 bool tx = !req->local_state_change; 5541 5542 if (ifmgd->auth_data && 5543 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5544 sdata_info(sdata, 5545 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5546 req->bssid, req->reason_code, 5547 ieee80211_get_reason_code_string(req->reason_code)); 5548 5549 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5550 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5551 IEEE80211_STYPE_DEAUTH, 5552 req->reason_code, tx, 5553 frame_buf); 5554 ieee80211_destroy_auth_data(sdata, false); 5555 ieee80211_report_disconnect(sdata, frame_buf, 5556 sizeof(frame_buf), true, 5557 req->reason_code); 5558 5559 return 0; 5560 } 5561 5562 if (ifmgd->assoc_data && 5563 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5564 sdata_info(sdata, 5565 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5566 req->bssid, req->reason_code, 5567 ieee80211_get_reason_code_string(req->reason_code)); 5568 5569 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5570 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5571 IEEE80211_STYPE_DEAUTH, 5572 req->reason_code, tx, 5573 frame_buf); 5574 ieee80211_destroy_assoc_data(sdata, false, true); 5575 ieee80211_report_disconnect(sdata, frame_buf, 5576 sizeof(frame_buf), true, 5577 req->reason_code); 5578 return 0; 5579 } 5580 5581 if (ifmgd->associated && 5582 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5583 sdata_info(sdata, 5584 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5585 req->bssid, req->reason_code, 5586 ieee80211_get_reason_code_string(req->reason_code)); 5587 5588 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5589 req->reason_code, tx, frame_buf); 5590 ieee80211_report_disconnect(sdata, frame_buf, 5591 sizeof(frame_buf), true, 5592 req->reason_code); 5593 return 0; 5594 } 5595 5596 return -ENOTCONN; 5597 } 5598 5599 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5600 struct cfg80211_disassoc_request *req) 5601 { 5602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5603 u8 bssid[ETH_ALEN]; 5604 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5605 5606 /* 5607 * cfg80211 should catch this ... but it's racy since 5608 * we can receive a disassoc frame, process it, hand it 5609 * to cfg80211 while that's in a locked section already 5610 * trying to tell us that the user wants to disconnect. 5611 */ 5612 if (ifmgd->associated != req->bss) 5613 return -ENOLINK; 5614 5615 sdata_info(sdata, 5616 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5617 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5618 5619 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5620 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5621 req->reason_code, !req->local_state_change, 5622 frame_buf); 5623 5624 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5625 req->reason_code); 5626 5627 return 0; 5628 } 5629 5630 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5631 { 5632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5633 5634 /* 5635 * Make sure some work items will not run after this, 5636 * they will not do anything but might not have been 5637 * cancelled when disconnecting. 5638 */ 5639 cancel_work_sync(&ifmgd->monitor_work); 5640 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5641 cancel_work_sync(&ifmgd->request_smps_work); 5642 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5643 cancel_work_sync(&ifmgd->chswitch_work); 5644 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5645 5646 sdata_lock(sdata); 5647 if (ifmgd->assoc_data) { 5648 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5649 ieee80211_destroy_assoc_data(sdata, false, false); 5650 cfg80211_assoc_timeout(sdata->dev, bss); 5651 } 5652 if (ifmgd->auth_data) 5653 ieee80211_destroy_auth_data(sdata, false); 5654 spin_lock_bh(&ifmgd->teardown_lock); 5655 if (ifmgd->teardown_skb) { 5656 kfree_skb(ifmgd->teardown_skb); 5657 ifmgd->teardown_skb = NULL; 5658 ifmgd->orig_teardown_skb = NULL; 5659 } 5660 kfree(ifmgd->assoc_req_ies); 5661 ifmgd->assoc_req_ies = NULL; 5662 ifmgd->assoc_req_ies_len = 0; 5663 spin_unlock_bh(&ifmgd->teardown_lock); 5664 del_timer_sync(&ifmgd->timer); 5665 sdata_unlock(sdata); 5666 } 5667 5668 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5669 enum nl80211_cqm_rssi_threshold_event rssi_event, 5670 s32 rssi_level, 5671 gfp_t gfp) 5672 { 5673 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5674 5675 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5676 5677 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5678 } 5679 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5680 5681 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5682 { 5683 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5684 5685 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5686 5687 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5688 } 5689 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5690