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_ON_ONCE(ssid == NULL)) 2637 ssid_len = 0; 2638 else 2639 ssid_len = ssid[1]; 2640 2641 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2642 (u32) -1, cbss->channel, 2643 ssid + 2, ssid_len, 2644 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2645 rcu_read_unlock(); 2646 2647 return skb; 2648 } 2649 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2650 2651 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2652 const u8 *buf, size_t len, bool tx, 2653 u16 reason) 2654 { 2655 struct ieee80211_event event = { 2656 .type = MLME_EVENT, 2657 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2658 .u.mlme.reason = reason, 2659 }; 2660 2661 if (tx) 2662 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2663 else 2664 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2665 2666 drv_event_callback(sdata->local, sdata, &event); 2667 } 2668 2669 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2670 { 2671 struct ieee80211_local *local = sdata->local; 2672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2673 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2674 bool tx; 2675 2676 sdata_lock(sdata); 2677 if (!ifmgd->associated) { 2678 sdata_unlock(sdata); 2679 return; 2680 } 2681 2682 tx = !sdata->csa_block_tx; 2683 2684 /* AP is probably out of range (or not reachable for another reason) so 2685 * remove the bss struct for that AP. 2686 */ 2687 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2688 2689 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2690 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2691 tx, frame_buf); 2692 mutex_lock(&local->mtx); 2693 sdata->vif.csa_active = false; 2694 ifmgd->csa_waiting_bcn = false; 2695 if (sdata->csa_block_tx) { 2696 ieee80211_wake_vif_queues(local, sdata, 2697 IEEE80211_QUEUE_STOP_REASON_CSA); 2698 sdata->csa_block_tx = false; 2699 } 2700 mutex_unlock(&local->mtx); 2701 2702 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2703 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2704 2705 sdata_unlock(sdata); 2706 } 2707 2708 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2709 { 2710 struct ieee80211_sub_if_data *sdata = 2711 container_of(work, struct ieee80211_sub_if_data, 2712 u.mgd.beacon_connection_loss_work); 2713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2714 2715 if (ifmgd->associated) 2716 ifmgd->beacon_loss_count++; 2717 2718 if (ifmgd->connection_loss) { 2719 sdata_info(sdata, "Connection to AP %pM lost\n", 2720 ifmgd->bssid); 2721 __ieee80211_disconnect(sdata); 2722 } else { 2723 ieee80211_mgd_probe_ap(sdata, true); 2724 } 2725 } 2726 2727 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2728 { 2729 struct ieee80211_sub_if_data *sdata = 2730 container_of(work, struct ieee80211_sub_if_data, 2731 u.mgd.csa_connection_drop_work); 2732 2733 __ieee80211_disconnect(sdata); 2734 } 2735 2736 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2737 { 2738 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2739 struct ieee80211_hw *hw = &sdata->local->hw; 2740 2741 trace_api_beacon_loss(sdata); 2742 2743 sdata->u.mgd.connection_loss = false; 2744 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2745 } 2746 EXPORT_SYMBOL(ieee80211_beacon_loss); 2747 2748 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2749 { 2750 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2751 struct ieee80211_hw *hw = &sdata->local->hw; 2752 2753 trace_api_connection_loss(sdata); 2754 2755 sdata->u.mgd.connection_loss = true; 2756 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2757 } 2758 EXPORT_SYMBOL(ieee80211_connection_loss); 2759 2760 2761 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2762 bool assoc) 2763 { 2764 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2765 2766 sdata_assert_lock(sdata); 2767 2768 if (!assoc) { 2769 /* 2770 * we are not authenticated yet, the only timer that could be 2771 * running is the timeout for the authentication response which 2772 * which is not relevant anymore. 2773 */ 2774 del_timer_sync(&sdata->u.mgd.timer); 2775 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2776 2777 eth_zero_addr(sdata->u.mgd.bssid); 2778 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2779 sdata->u.mgd.flags = 0; 2780 mutex_lock(&sdata->local->mtx); 2781 ieee80211_vif_release_channel(sdata); 2782 mutex_unlock(&sdata->local->mtx); 2783 } 2784 2785 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2786 kfree(auth_data); 2787 sdata->u.mgd.auth_data = NULL; 2788 } 2789 2790 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2791 bool assoc, bool abandon) 2792 { 2793 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2794 2795 sdata_assert_lock(sdata); 2796 2797 if (!assoc) { 2798 /* 2799 * we are not associated yet, the only timer that could be 2800 * running is the timeout for the association response which 2801 * which is not relevant anymore. 2802 */ 2803 del_timer_sync(&sdata->u.mgd.timer); 2804 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2805 2806 eth_zero_addr(sdata->u.mgd.bssid); 2807 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2808 sdata->u.mgd.flags = 0; 2809 sdata->vif.mu_mimo_owner = false; 2810 2811 mutex_lock(&sdata->local->mtx); 2812 ieee80211_vif_release_channel(sdata); 2813 mutex_unlock(&sdata->local->mtx); 2814 2815 if (abandon) 2816 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2817 } 2818 2819 kfree(assoc_data); 2820 sdata->u.mgd.assoc_data = NULL; 2821 } 2822 2823 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2824 struct ieee80211_mgmt *mgmt, size_t len) 2825 { 2826 struct ieee80211_local *local = sdata->local; 2827 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2828 u8 *pos; 2829 struct ieee802_11_elems elems; 2830 u32 tx_flags = 0; 2831 2832 pos = mgmt->u.auth.variable; 2833 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2834 mgmt->bssid, auth_data->bss->bssid); 2835 if (!elems.challenge) 2836 return; 2837 auth_data->expected_transaction = 4; 2838 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2839 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2840 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2841 IEEE80211_TX_INTFL_MLME_CONN_TX; 2842 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2843 elems.challenge - 2, elems.challenge_len + 2, 2844 auth_data->bss->bssid, auth_data->bss->bssid, 2845 auth_data->key, auth_data->key_len, 2846 auth_data->key_idx, tx_flags); 2847 } 2848 2849 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2850 const u8 *bssid) 2851 { 2852 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2853 struct sta_info *sta; 2854 bool result = true; 2855 2856 sdata_info(sdata, "authenticated\n"); 2857 ifmgd->auth_data->done = true; 2858 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2859 ifmgd->auth_data->timeout_started = true; 2860 run_again(sdata, ifmgd->auth_data->timeout); 2861 2862 /* move station state to auth */ 2863 mutex_lock(&sdata->local->sta_mtx); 2864 sta = sta_info_get(sdata, bssid); 2865 if (!sta) { 2866 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2867 result = false; 2868 goto out; 2869 } 2870 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2871 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2872 result = false; 2873 goto out; 2874 } 2875 2876 out: 2877 mutex_unlock(&sdata->local->sta_mtx); 2878 return result; 2879 } 2880 2881 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2882 struct ieee80211_mgmt *mgmt, size_t len) 2883 { 2884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2885 u8 bssid[ETH_ALEN]; 2886 u16 auth_alg, auth_transaction, status_code; 2887 struct ieee80211_event event = { 2888 .type = MLME_EVENT, 2889 .u.mlme.data = AUTH_EVENT, 2890 }; 2891 2892 sdata_assert_lock(sdata); 2893 2894 if (len < 24 + 6) 2895 return; 2896 2897 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2898 return; 2899 2900 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2901 2902 if (!ether_addr_equal(bssid, mgmt->bssid)) 2903 return; 2904 2905 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2906 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2907 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2908 2909 if (auth_alg != ifmgd->auth_data->algorithm || 2910 (auth_alg != WLAN_AUTH_SAE && 2911 auth_transaction != ifmgd->auth_data->expected_transaction) || 2912 (auth_alg == WLAN_AUTH_SAE && 2913 (auth_transaction < ifmgd->auth_data->expected_transaction || 2914 auth_transaction > 2))) { 2915 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2916 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2917 auth_transaction, 2918 ifmgd->auth_data->expected_transaction); 2919 return; 2920 } 2921 2922 if (status_code != WLAN_STATUS_SUCCESS) { 2923 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2924 mgmt->sa, status_code); 2925 ieee80211_destroy_auth_data(sdata, false); 2926 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2927 event.u.mlme.status = MLME_DENIED; 2928 event.u.mlme.reason = status_code; 2929 drv_event_callback(sdata->local, sdata, &event); 2930 return; 2931 } 2932 2933 switch (ifmgd->auth_data->algorithm) { 2934 case WLAN_AUTH_OPEN: 2935 case WLAN_AUTH_LEAP: 2936 case WLAN_AUTH_FT: 2937 case WLAN_AUTH_SAE: 2938 case WLAN_AUTH_FILS_SK: 2939 case WLAN_AUTH_FILS_SK_PFS: 2940 case WLAN_AUTH_FILS_PK: 2941 break; 2942 case WLAN_AUTH_SHARED_KEY: 2943 if (ifmgd->auth_data->expected_transaction != 4) { 2944 ieee80211_auth_challenge(sdata, mgmt, len); 2945 /* need another frame */ 2946 return; 2947 } 2948 break; 2949 default: 2950 WARN_ONCE(1, "invalid auth alg %d", 2951 ifmgd->auth_data->algorithm); 2952 return; 2953 } 2954 2955 event.u.mlme.status = MLME_SUCCESS; 2956 drv_event_callback(sdata->local, sdata, &event); 2957 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 2958 (auth_transaction == 2 && 2959 ifmgd->auth_data->expected_transaction == 2)) { 2960 if (!ieee80211_mark_sta_auth(sdata, bssid)) 2961 goto out_err; 2962 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2963 auth_transaction == 2) { 2964 sdata_info(sdata, "SAE peer confirmed\n"); 2965 ifmgd->auth_data->peer_confirmed = true; 2966 } 2967 2968 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2969 return; 2970 out_err: 2971 mutex_unlock(&sdata->local->sta_mtx); 2972 /* ignore frame -- wait for timeout */ 2973 } 2974 2975 #define case_WLAN(type) \ 2976 case WLAN_REASON_##type: return #type 2977 2978 const char *ieee80211_get_reason_code_string(u16 reason_code) 2979 { 2980 switch (reason_code) { 2981 case_WLAN(UNSPECIFIED); 2982 case_WLAN(PREV_AUTH_NOT_VALID); 2983 case_WLAN(DEAUTH_LEAVING); 2984 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2985 case_WLAN(DISASSOC_AP_BUSY); 2986 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2987 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2988 case_WLAN(DISASSOC_STA_HAS_LEFT); 2989 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2990 case_WLAN(DISASSOC_BAD_POWER); 2991 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2992 case_WLAN(INVALID_IE); 2993 case_WLAN(MIC_FAILURE); 2994 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2995 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2996 case_WLAN(IE_DIFFERENT); 2997 case_WLAN(INVALID_GROUP_CIPHER); 2998 case_WLAN(INVALID_PAIRWISE_CIPHER); 2999 case_WLAN(INVALID_AKMP); 3000 case_WLAN(UNSUPP_RSN_VERSION); 3001 case_WLAN(INVALID_RSN_IE_CAP); 3002 case_WLAN(IEEE8021X_FAILED); 3003 case_WLAN(CIPHER_SUITE_REJECTED); 3004 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3005 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3006 case_WLAN(DISASSOC_LOW_ACK); 3007 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3008 case_WLAN(QSTA_LEAVE_QBSS); 3009 case_WLAN(QSTA_NOT_USE); 3010 case_WLAN(QSTA_REQUIRE_SETUP); 3011 case_WLAN(QSTA_TIMEOUT); 3012 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3013 case_WLAN(MESH_PEER_CANCELED); 3014 case_WLAN(MESH_MAX_PEERS); 3015 case_WLAN(MESH_CONFIG); 3016 case_WLAN(MESH_CLOSE); 3017 case_WLAN(MESH_MAX_RETRIES); 3018 case_WLAN(MESH_CONFIRM_TIMEOUT); 3019 case_WLAN(MESH_INVALID_GTK); 3020 case_WLAN(MESH_INCONSISTENT_PARAM); 3021 case_WLAN(MESH_INVALID_SECURITY); 3022 case_WLAN(MESH_PATH_ERROR); 3023 case_WLAN(MESH_PATH_NOFORWARD); 3024 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3025 case_WLAN(MAC_EXISTS_IN_MBSS); 3026 case_WLAN(MESH_CHAN_REGULATORY); 3027 case_WLAN(MESH_CHAN); 3028 default: return "<unknown>"; 3029 } 3030 } 3031 3032 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3033 struct ieee80211_mgmt *mgmt, size_t len) 3034 { 3035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3036 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3037 3038 sdata_assert_lock(sdata); 3039 3040 if (len < 24 + 2) 3041 return; 3042 3043 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3044 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3045 return; 3046 } 3047 3048 if (ifmgd->associated && 3049 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3050 const u8 *bssid = ifmgd->associated->bssid; 3051 3052 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3053 bssid, reason_code, 3054 ieee80211_get_reason_code_string(reason_code)); 3055 3056 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3057 3058 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3059 reason_code); 3060 return; 3061 } 3062 3063 if (ifmgd->assoc_data && 3064 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3065 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3066 3067 sdata_info(sdata, 3068 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3069 bssid, reason_code, 3070 ieee80211_get_reason_code_string(reason_code)); 3071 3072 ieee80211_destroy_assoc_data(sdata, false, true); 3073 3074 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3075 return; 3076 } 3077 } 3078 3079 3080 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3081 struct ieee80211_mgmt *mgmt, size_t len) 3082 { 3083 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3084 u16 reason_code; 3085 3086 sdata_assert_lock(sdata); 3087 3088 if (len < 24 + 2) 3089 return; 3090 3091 if (!ifmgd->associated || 3092 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3093 return; 3094 3095 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3096 3097 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3098 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3099 return; 3100 } 3101 3102 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3103 mgmt->sa, reason_code, 3104 ieee80211_get_reason_code_string(reason_code)); 3105 3106 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3107 3108 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3109 } 3110 3111 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3112 u8 *supp_rates, unsigned int supp_rates_len, 3113 u32 *rates, u32 *basic_rates, 3114 bool *have_higher_than_11mbit, 3115 int *min_rate, int *min_rate_index, 3116 int shift) 3117 { 3118 int i, j; 3119 3120 for (i = 0; i < supp_rates_len; i++) { 3121 int rate = supp_rates[i] & 0x7f; 3122 bool is_basic = !!(supp_rates[i] & 0x80); 3123 3124 if ((rate * 5 * (1 << shift)) > 110) 3125 *have_higher_than_11mbit = true; 3126 3127 /* 3128 * Skip HT and VHT BSS membership selectors since they're not 3129 * rates. 3130 * 3131 * Note: Even though the membership selector and the basic 3132 * rate flag share the same bit, they are not exactly 3133 * the same. 3134 */ 3135 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3136 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3137 continue; 3138 3139 for (j = 0; j < sband->n_bitrates; j++) { 3140 struct ieee80211_rate *br; 3141 int brate; 3142 3143 br = &sband->bitrates[j]; 3144 3145 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3146 if (brate == rate) { 3147 *rates |= BIT(j); 3148 if (is_basic) 3149 *basic_rates |= BIT(j); 3150 if ((rate * 5) < *min_rate) { 3151 *min_rate = rate * 5; 3152 *min_rate_index = j; 3153 } 3154 break; 3155 } 3156 } 3157 } 3158 } 3159 3160 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3161 const struct ieee802_11_elems *elems) 3162 { 3163 if (elems->ext_capab_len < 10) 3164 return false; 3165 3166 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3167 return false; 3168 3169 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3170 IEEE80211_HE_MAC_CAP0_TWT_RES; 3171 } 3172 3173 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3174 struct sta_info *sta, 3175 struct ieee802_11_elems *elems) 3176 { 3177 bool twt = ieee80211_twt_req_supported(sta, elems); 3178 3179 if (sdata->vif.bss_conf.twt_requester != twt) { 3180 sdata->vif.bss_conf.twt_requester = twt; 3181 return BSS_CHANGED_TWT; 3182 } 3183 return 0; 3184 } 3185 3186 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3187 struct cfg80211_bss *cbss, 3188 struct ieee80211_mgmt *mgmt, size_t len) 3189 { 3190 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3191 struct ieee80211_local *local = sdata->local; 3192 struct ieee80211_supported_band *sband; 3193 struct sta_info *sta; 3194 u8 *pos; 3195 u16 capab_info, aid; 3196 struct ieee802_11_elems elems; 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 pos = mgmt->u.assoc_resp.variable; 3225 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3226 mgmt->bssid, assoc_data->bss->bssid); 3227 3228 if (!elems.supp_rates) { 3229 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3230 return false; 3231 } 3232 3233 ifmgd->aid = aid; 3234 ifmgd->tdls_chan_switch_prohibited = 3235 elems.ext_capab && elems.ext_capab_len >= 5 && 3236 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3237 3238 /* 3239 * Some APs are erroneously not including some information in their 3240 * (re)association response frames. Try to recover by using the data 3241 * from the beacon or probe response. This seems to afflict mobile 3242 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3243 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3244 */ 3245 if ((assoc_data->wmm && !elems.wmm_param) || 3246 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3247 (!elems.ht_cap_elem || !elems.ht_operation)) || 3248 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3249 (!elems.vht_cap_elem || !elems.vht_operation))) { 3250 const struct cfg80211_bss_ies *ies; 3251 struct ieee802_11_elems bss_elems; 3252 3253 rcu_read_lock(); 3254 ies = rcu_dereference(cbss->ies); 3255 if (ies) 3256 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3257 GFP_ATOMIC); 3258 rcu_read_unlock(); 3259 if (!bss_ies) 3260 return false; 3261 3262 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3263 false, &bss_elems, 3264 mgmt->bssid, 3265 assoc_data->bss->bssid); 3266 if (assoc_data->wmm && 3267 !elems.wmm_param && bss_elems.wmm_param) { 3268 elems.wmm_param = bss_elems.wmm_param; 3269 sdata_info(sdata, 3270 "AP bug: WMM param missing from AssocResp\n"); 3271 } 3272 3273 /* 3274 * Also check if we requested HT/VHT, otherwise the AP doesn't 3275 * have to include the IEs in the (re)association response. 3276 */ 3277 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 3278 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3279 elems.ht_cap_elem = bss_elems.ht_cap_elem; 3280 sdata_info(sdata, 3281 "AP bug: HT capability missing from AssocResp\n"); 3282 } 3283 if (!elems.ht_operation && bss_elems.ht_operation && 3284 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3285 elems.ht_operation = bss_elems.ht_operation; 3286 sdata_info(sdata, 3287 "AP bug: HT operation missing from AssocResp\n"); 3288 } 3289 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 3290 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3291 elems.vht_cap_elem = bss_elems.vht_cap_elem; 3292 sdata_info(sdata, 3293 "AP bug: VHT capa missing from AssocResp\n"); 3294 } 3295 if (!elems.vht_operation && bss_elems.vht_operation && 3296 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3297 elems.vht_operation = bss_elems.vht_operation; 3298 sdata_info(sdata, 3299 "AP bug: VHT operation missing from AssocResp\n"); 3300 } 3301 } 3302 3303 /* 3304 * We previously checked these in the beacon/probe response, so 3305 * they should be present here. This is just a safety net. 3306 */ 3307 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3308 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 3309 sdata_info(sdata, 3310 "HT AP is missing WMM params or HT capability/operation\n"); 3311 ret = false; 3312 goto out; 3313 } 3314 3315 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3316 (!elems.vht_cap_elem || !elems.vht_operation)) { 3317 sdata_info(sdata, 3318 "VHT AP is missing VHT capability/operation\n"); 3319 ret = false; 3320 goto out; 3321 } 3322 3323 mutex_lock(&sdata->local->sta_mtx); 3324 /* 3325 * station info was already allocated and inserted before 3326 * the association and should be available to us 3327 */ 3328 sta = sta_info_get(sdata, cbss->bssid); 3329 if (WARN_ON(!sta)) { 3330 mutex_unlock(&sdata->local->sta_mtx); 3331 ret = false; 3332 goto out; 3333 } 3334 3335 sband = ieee80211_get_sband(sdata); 3336 if (!sband) { 3337 mutex_unlock(&sdata->local->sta_mtx); 3338 ret = false; 3339 goto out; 3340 } 3341 3342 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3343 (!elems.he_cap || !elems.he_operation)) { 3344 mutex_unlock(&sdata->local->sta_mtx); 3345 sdata_info(sdata, 3346 "HE AP is missing HE capability/operation\n"); 3347 ret = false; 3348 goto out; 3349 } 3350 3351 /* Set up internal HT/VHT capabilities */ 3352 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3353 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3354 elems.ht_cap_elem, sta); 3355 3356 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3357 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3358 elems.vht_cap_elem, sta); 3359 3360 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3361 elems.he_cap) { 3362 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3363 elems.he_cap, 3364 elems.he_cap_len, 3365 sta); 3366 3367 bss_conf->he_support = sta->sta.he_cap.has_he; 3368 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 3369 } else { 3370 bss_conf->he_support = false; 3371 bss_conf->twt_requester = false; 3372 } 3373 3374 if (bss_conf->he_support) { 3375 bss_conf->bss_color = 3376 le32_get_bits(elems.he_operation->he_oper_params, 3377 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3378 3379 bss_conf->htc_trig_based_pkt_ext = 3380 le32_get_bits(elems.he_operation->he_oper_params, 3381 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3382 bss_conf->frame_time_rts_th = 3383 le32_get_bits(elems.he_operation->he_oper_params, 3384 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3385 3386 bss_conf->multi_sta_back_32bit = 3387 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3388 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3389 3390 bss_conf->ack_enabled = 3391 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3392 IEEE80211_HE_MAC_CAP2_ACK_EN; 3393 3394 bss_conf->uora_exists = !!elems.uora_element; 3395 if (elems.uora_element) 3396 bss_conf->uora_ocw_range = elems.uora_element[0]; 3397 3398 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems.he_operation); 3399 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems.he_spr); 3400 /* TODO: OPEN: what happens if BSS color disable is set? */ 3401 } 3402 3403 if (cbss->transmitted_bss) { 3404 bss_conf->nontransmitted = true; 3405 ether_addr_copy(bss_conf->transmitter_bssid, 3406 cbss->transmitted_bss->bssid); 3407 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3408 bss_conf->bssid_index = cbss->bssid_index; 3409 } 3410 3411 /* 3412 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3413 * in their association response, so ignore that data for our own 3414 * configuration. If it changed since the last beacon, we'll get the 3415 * next beacon and update then. 3416 */ 3417 3418 /* 3419 * If an operating mode notification IE is present, override the 3420 * NSS calculation (that would be done in rate_control_rate_init()) 3421 * and use the # of streams from that element. 3422 */ 3423 if (elems.opmode_notif && 3424 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3425 u8 nss; 3426 3427 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3428 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3429 nss += 1; 3430 sta->sta.rx_nss = nss; 3431 } 3432 3433 rate_control_rate_init(sta); 3434 3435 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3436 set_sta_flag(sta, WLAN_STA_MFP); 3437 sta->sta.mfp = true; 3438 } else { 3439 sta->sta.mfp = false; 3440 } 3441 3442 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3443 3444 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3445 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3446 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3447 if (err) { 3448 sdata_info(sdata, 3449 "failed to move station %pM to desired state\n", 3450 sta->sta.addr); 3451 WARN_ON(__sta_info_destroy(sta)); 3452 mutex_unlock(&sdata->local->sta_mtx); 3453 ret = false; 3454 goto out; 3455 } 3456 3457 mutex_unlock(&sdata->local->sta_mtx); 3458 3459 /* 3460 * Always handle WMM once after association regardless 3461 * of the first value the AP uses. Setting -1 here has 3462 * that effect because the AP values is an unsigned 3463 * 4-bit value. 3464 */ 3465 ifmgd->wmm_last_param_set = -1; 3466 ifmgd->mu_edca_last_param_set = -1; 3467 3468 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3469 ieee80211_set_wmm_default(sdata, false, false); 3470 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3471 elems.wmm_param_len, 3472 elems.mu_edca_param_set)) { 3473 /* still enable QoS since we might have HT/VHT */ 3474 ieee80211_set_wmm_default(sdata, false, true); 3475 /* set the disable-WMM flag in this case to disable 3476 * tracking WMM parameter changes in the beacon if 3477 * the parameters weren't actually valid. Doing so 3478 * avoids changing parameters very strangely when 3479 * the AP is going back and forth between valid and 3480 * invalid parameters. 3481 */ 3482 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3483 } 3484 changed |= BSS_CHANGED_QOS; 3485 3486 if (elems.max_idle_period_ie) { 3487 bss_conf->max_idle_period = 3488 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3489 bss_conf->protected_keep_alive = 3490 !!(elems.max_idle_period_ie->idle_options & 3491 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3492 changed |= BSS_CHANGED_KEEP_ALIVE; 3493 } else { 3494 bss_conf->max_idle_period = 0; 3495 bss_conf->protected_keep_alive = false; 3496 } 3497 3498 /* set AID and assoc capability, 3499 * ieee80211_set_associated() will tell the driver */ 3500 bss_conf->aid = aid; 3501 bss_conf->assoc_capability = capab_info; 3502 ieee80211_set_associated(sdata, cbss, changed); 3503 3504 /* 3505 * If we're using 4-addr mode, let the AP know that we're 3506 * doing so, so that it can create the STA VLAN on its side 3507 */ 3508 if (ifmgd->use_4addr) 3509 ieee80211_send_4addr_nullfunc(local, sdata); 3510 3511 /* 3512 * Start timer to probe the connection to the AP now. 3513 * Also start the timer that will detect beacon loss. 3514 */ 3515 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3516 ieee80211_sta_reset_beacon_monitor(sdata); 3517 3518 ret = true; 3519 out: 3520 kfree(bss_ies); 3521 return ret; 3522 } 3523 3524 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3525 struct ieee80211_mgmt *mgmt, 3526 size_t len) 3527 { 3528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3529 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3530 u16 capab_info, status_code, aid; 3531 struct ieee802_11_elems elems; 3532 int ac, uapsd_queues = -1; 3533 u8 *pos; 3534 bool reassoc; 3535 struct cfg80211_bss *bss; 3536 struct ieee80211_event event = { 3537 .type = MLME_EVENT, 3538 .u.mlme.data = ASSOC_EVENT, 3539 }; 3540 3541 sdata_assert_lock(sdata); 3542 3543 if (!assoc_data) 3544 return; 3545 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3546 return; 3547 3548 /* 3549 * AssocResp and ReassocResp have identical structure, so process both 3550 * of them in this function. 3551 */ 3552 3553 if (len < 24 + 6) 3554 return; 3555 3556 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3557 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3558 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3559 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3560 3561 sdata_info(sdata, 3562 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3563 reassoc ? "Rea" : "A", mgmt->sa, 3564 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3565 3566 if (assoc_data->fils_kek_len && 3567 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3568 return; 3569 3570 pos = mgmt->u.assoc_resp.variable; 3571 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3572 mgmt->bssid, assoc_data->bss->bssid); 3573 3574 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3575 elems.timeout_int && 3576 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3577 u32 tu, ms; 3578 tu = le32_to_cpu(elems.timeout_int->value); 3579 ms = tu * 1024 / 1000; 3580 sdata_info(sdata, 3581 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3582 mgmt->sa, tu, ms); 3583 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3584 assoc_data->timeout_started = true; 3585 if (ms > IEEE80211_ASSOC_TIMEOUT) 3586 run_again(sdata, assoc_data->timeout); 3587 return; 3588 } 3589 3590 bss = assoc_data->bss; 3591 3592 if (status_code != WLAN_STATUS_SUCCESS) { 3593 sdata_info(sdata, "%pM denied association (code=%d)\n", 3594 mgmt->sa, status_code); 3595 ieee80211_destroy_assoc_data(sdata, false, false); 3596 event.u.mlme.status = MLME_DENIED; 3597 event.u.mlme.reason = status_code; 3598 drv_event_callback(sdata->local, sdata, &event); 3599 } else { 3600 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3601 /* oops -- internal error -- send timeout for now */ 3602 ieee80211_destroy_assoc_data(sdata, false, false); 3603 cfg80211_assoc_timeout(sdata->dev, bss); 3604 return; 3605 } 3606 event.u.mlme.status = MLME_SUCCESS; 3607 drv_event_callback(sdata->local, sdata, &event); 3608 sdata_info(sdata, "associated\n"); 3609 3610 /* 3611 * destroy assoc_data afterwards, as otherwise an idle 3612 * recalc after assoc_data is NULL but before associated 3613 * is set can cause the interface to go idle 3614 */ 3615 ieee80211_destroy_assoc_data(sdata, true, false); 3616 3617 /* get uapsd queues configuration */ 3618 uapsd_queues = 0; 3619 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3620 if (sdata->tx_conf[ac].uapsd) 3621 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3622 } 3623 3624 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues, 3625 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3626 } 3627 3628 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3629 struct ieee80211_mgmt *mgmt, size_t len, 3630 struct ieee80211_rx_status *rx_status) 3631 { 3632 struct ieee80211_local *local = sdata->local; 3633 struct ieee80211_bss *bss; 3634 struct ieee80211_channel *channel; 3635 3636 sdata_assert_lock(sdata); 3637 3638 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3639 if (!channel) 3640 return; 3641 3642 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3643 if (bss) { 3644 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3645 ieee80211_rx_bss_put(local, bss); 3646 } 3647 } 3648 3649 3650 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3651 struct sk_buff *skb) 3652 { 3653 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3654 struct ieee80211_if_managed *ifmgd; 3655 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3656 size_t baselen, len = skb->len; 3657 3658 ifmgd = &sdata->u.mgd; 3659 3660 sdata_assert_lock(sdata); 3661 3662 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3663 return; /* ignore ProbeResp to foreign address */ 3664 3665 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3666 if (baselen > len) 3667 return; 3668 3669 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3670 3671 if (ifmgd->associated && 3672 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3673 ieee80211_reset_ap_probe(sdata); 3674 } 3675 3676 /* 3677 * This is the canonical list of information elements we care about, 3678 * the filter code also gives us all changes to the Microsoft OUI 3679 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3680 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3681 * changes to requested client power. 3682 * 3683 * We implement beacon filtering in software since that means we can 3684 * avoid processing the frame here and in cfg80211, and userspace 3685 * will not be able to tell whether the hardware supports it or not. 3686 * 3687 * XXX: This list needs to be dynamic -- userspace needs to be able to 3688 * add items it requires. It also needs to be able to tell us to 3689 * look out for other vendor IEs. 3690 */ 3691 static const u64 care_about_ies = 3692 (1ULL << WLAN_EID_COUNTRY) | 3693 (1ULL << WLAN_EID_ERP_INFO) | 3694 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3695 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3696 (1ULL << WLAN_EID_HT_CAPABILITY) | 3697 (1ULL << WLAN_EID_HT_OPERATION) | 3698 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3699 3700 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3701 struct ieee80211_if_managed *ifmgd, 3702 struct ieee80211_bss_conf *bss_conf, 3703 struct ieee80211_local *local, 3704 struct ieee80211_rx_status *rx_status) 3705 { 3706 /* Track average RSSI from the Beacon frames of the current AP */ 3707 3708 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3709 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3710 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3711 ifmgd->last_cqm_event_signal = 0; 3712 ifmgd->count_beacon_signal = 1; 3713 ifmgd->last_ave_beacon_signal = 0; 3714 } else { 3715 ifmgd->count_beacon_signal++; 3716 } 3717 3718 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3719 3720 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3721 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3722 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3723 int last_sig = ifmgd->last_ave_beacon_signal; 3724 struct ieee80211_event event = { 3725 .type = RSSI_EVENT, 3726 }; 3727 3728 /* 3729 * if signal crosses either of the boundaries, invoke callback 3730 * with appropriate parameters 3731 */ 3732 if (sig > ifmgd->rssi_max_thold && 3733 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3734 ifmgd->last_ave_beacon_signal = sig; 3735 event.u.rssi.data = RSSI_EVENT_HIGH; 3736 drv_event_callback(local, sdata, &event); 3737 } else if (sig < ifmgd->rssi_min_thold && 3738 (last_sig >= ifmgd->rssi_max_thold || 3739 last_sig == 0)) { 3740 ifmgd->last_ave_beacon_signal = sig; 3741 event.u.rssi.data = RSSI_EVENT_LOW; 3742 drv_event_callback(local, sdata, &event); 3743 } 3744 } 3745 3746 if (bss_conf->cqm_rssi_thold && 3747 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3748 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3749 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3750 int last_event = ifmgd->last_cqm_event_signal; 3751 int thold = bss_conf->cqm_rssi_thold; 3752 int hyst = bss_conf->cqm_rssi_hyst; 3753 3754 if (sig < thold && 3755 (last_event == 0 || sig < last_event - hyst)) { 3756 ifmgd->last_cqm_event_signal = sig; 3757 ieee80211_cqm_rssi_notify( 3758 &sdata->vif, 3759 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3760 sig, GFP_KERNEL); 3761 } else if (sig > thold && 3762 (last_event == 0 || sig > last_event + hyst)) { 3763 ifmgd->last_cqm_event_signal = sig; 3764 ieee80211_cqm_rssi_notify( 3765 &sdata->vif, 3766 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3767 sig, GFP_KERNEL); 3768 } 3769 } 3770 3771 if (bss_conf->cqm_rssi_low && 3772 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3773 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3774 int last_event = ifmgd->last_cqm_event_signal; 3775 int low = bss_conf->cqm_rssi_low; 3776 int high = bss_conf->cqm_rssi_high; 3777 3778 if (sig < low && 3779 (last_event == 0 || last_event >= low)) { 3780 ifmgd->last_cqm_event_signal = sig; 3781 ieee80211_cqm_rssi_notify( 3782 &sdata->vif, 3783 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3784 sig, GFP_KERNEL); 3785 } else if (sig > high && 3786 (last_event == 0 || last_event <= high)) { 3787 ifmgd->last_cqm_event_signal = sig; 3788 ieee80211_cqm_rssi_notify( 3789 &sdata->vif, 3790 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3791 sig, GFP_KERNEL); 3792 } 3793 } 3794 } 3795 3796 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3797 struct cfg80211_bss *bss) 3798 { 3799 if (ether_addr_equal(tx_bssid, bss->bssid)) 3800 return true; 3801 if (!bss->transmitted_bss) 3802 return false; 3803 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3804 } 3805 3806 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3807 struct ieee80211_mgmt *mgmt, size_t len, 3808 struct ieee80211_rx_status *rx_status) 3809 { 3810 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3811 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3812 size_t baselen; 3813 struct ieee802_11_elems elems; 3814 struct ieee80211_local *local = sdata->local; 3815 struct ieee80211_chanctx_conf *chanctx_conf; 3816 struct ieee80211_channel *chan; 3817 struct sta_info *sta; 3818 u32 changed = 0; 3819 bool erp_valid; 3820 u8 erp_value = 0; 3821 u32 ncrc; 3822 u8 *bssid; 3823 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3824 3825 sdata_assert_lock(sdata); 3826 3827 /* Process beacon from the current BSS */ 3828 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3829 if (baselen > len) 3830 return; 3831 3832 rcu_read_lock(); 3833 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3834 if (!chanctx_conf) { 3835 rcu_read_unlock(); 3836 return; 3837 } 3838 3839 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3840 rcu_read_unlock(); 3841 return; 3842 } 3843 chan = chanctx_conf->def.chan; 3844 rcu_read_unlock(); 3845 3846 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3847 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) { 3848 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3849 len - baselen, false, &elems, 3850 mgmt->bssid, 3851 ifmgd->assoc_data->bss->bssid); 3852 3853 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3854 3855 if (elems.dtim_period) 3856 ifmgd->dtim_period = elems.dtim_period; 3857 ifmgd->have_beacon = true; 3858 ifmgd->assoc_data->need_beacon = false; 3859 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3860 sdata->vif.bss_conf.sync_tsf = 3861 le64_to_cpu(mgmt->u.beacon.timestamp); 3862 sdata->vif.bss_conf.sync_device_ts = 3863 rx_status->device_timestamp; 3864 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3865 } 3866 3867 if (elems.mbssid_config_ie) 3868 bss_conf->profile_periodicity = 3869 elems.mbssid_config_ie->profile_periodicity; 3870 3871 if (elems.ext_capab_len >= 11 && 3872 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 3873 bss_conf->ema_ap = true; 3874 3875 /* continue assoc process */ 3876 ifmgd->assoc_data->timeout = jiffies; 3877 ifmgd->assoc_data->timeout_started = true; 3878 run_again(sdata, ifmgd->assoc_data->timeout); 3879 return; 3880 } 3881 3882 if (!ifmgd->associated || 3883 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated)) 3884 return; 3885 bssid = ifmgd->associated->bssid; 3886 3887 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3888 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3889 local, rx_status); 3890 3891 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3892 mlme_dbg_ratelimited(sdata, 3893 "cancelling AP probe due to a received beacon\n"); 3894 ieee80211_reset_ap_probe(sdata); 3895 } 3896 3897 /* 3898 * Push the beacon loss detection into the future since 3899 * we are processing a beacon from the AP just now. 3900 */ 3901 ieee80211_sta_reset_beacon_monitor(sdata); 3902 3903 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3904 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3905 len - baselen, false, &elems, 3906 care_about_ies, ncrc, 3907 mgmt->bssid, bssid); 3908 3909 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3910 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3911 if (local->hw.conf.dynamic_ps_timeout > 0) { 3912 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3913 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3914 ieee80211_hw_config(local, 3915 IEEE80211_CONF_CHANGE_PS); 3916 } 3917 ieee80211_send_nullfunc(local, sdata, false); 3918 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3919 local->pspolling = true; 3920 3921 /* 3922 * Here is assumed that the driver will be 3923 * able to send ps-poll frame and receive a 3924 * response even though power save mode is 3925 * enabled, but some drivers might require 3926 * to disable power save here. This needs 3927 * to be investigated. 3928 */ 3929 ieee80211_send_pspoll(local, sdata); 3930 } 3931 } 3932 3933 if (sdata->vif.p2p || 3934 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3935 struct ieee80211_p2p_noa_attr noa = {}; 3936 int ret; 3937 3938 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3939 len - baselen, 3940 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3941 (u8 *) &noa, sizeof(noa)); 3942 if (ret >= 2) { 3943 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3944 /* valid noa_attr and index changed */ 3945 sdata->u.mgd.p2p_noa_index = noa.index; 3946 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3947 changed |= BSS_CHANGED_P2P_PS; 3948 /* 3949 * make sure we update all information, the CRC 3950 * mechanism doesn't look at P2P attributes. 3951 */ 3952 ifmgd->beacon_crc_valid = false; 3953 } 3954 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3955 /* noa_attr not found and we had valid noa_attr before */ 3956 sdata->u.mgd.p2p_noa_index = -1; 3957 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3958 changed |= BSS_CHANGED_P2P_PS; 3959 ifmgd->beacon_crc_valid = false; 3960 } 3961 } 3962 3963 if (ifmgd->csa_waiting_bcn) 3964 ieee80211_chswitch_post_beacon(sdata); 3965 3966 /* 3967 * Update beacon timing and dtim count on every beacon appearance. This 3968 * will allow the driver to use the most updated values. Do it before 3969 * comparing this one with last received beacon. 3970 * IMPORTANT: These parameters would possibly be out of sync by the time 3971 * the driver will use them. The synchronized view is currently 3972 * guaranteed only in certain callbacks. 3973 */ 3974 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3975 sdata->vif.bss_conf.sync_tsf = 3976 le64_to_cpu(mgmt->u.beacon.timestamp); 3977 sdata->vif.bss_conf.sync_device_ts = 3978 rx_status->device_timestamp; 3979 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3980 } 3981 3982 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3983 return; 3984 ifmgd->beacon_crc = ncrc; 3985 ifmgd->beacon_crc_valid = true; 3986 3987 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3988 3989 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3990 rx_status->device_timestamp, 3991 &elems, true); 3992 3993 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3994 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3995 elems.wmm_param_len, 3996 elems.mu_edca_param_set)) 3997 changed |= BSS_CHANGED_QOS; 3998 3999 /* 4000 * If we haven't had a beacon before, tell the driver about the 4001 * DTIM period (and beacon timing if desired) now. 4002 */ 4003 if (!ifmgd->have_beacon) { 4004 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4005 bss_conf->dtim_period = elems.dtim_period ?: 1; 4006 4007 changed |= BSS_CHANGED_BEACON_INFO; 4008 ifmgd->have_beacon = true; 4009 4010 mutex_lock(&local->iflist_mtx); 4011 ieee80211_recalc_ps(local); 4012 mutex_unlock(&local->iflist_mtx); 4013 4014 ieee80211_recalc_ps_vif(sdata); 4015 } 4016 4017 if (elems.erp_info) { 4018 erp_valid = true; 4019 erp_value = elems.erp_info[0]; 4020 } else { 4021 erp_valid = false; 4022 } 4023 changed |= ieee80211_handle_bss_capability(sdata, 4024 le16_to_cpu(mgmt->u.beacon.capab_info), 4025 erp_valid, erp_value); 4026 4027 mutex_lock(&local->sta_mtx); 4028 sta = sta_info_get(sdata, bssid); 4029 4030 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4031 4032 if (ieee80211_config_bw(sdata, sta, 4033 elems.ht_cap_elem, elems.ht_operation, 4034 elems.vht_operation, elems.he_operation, 4035 bssid, &changed)) { 4036 mutex_unlock(&local->sta_mtx); 4037 sdata_info(sdata, 4038 "failed to follow AP %pM bandwidth change, disconnect\n", 4039 bssid); 4040 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4041 WLAN_REASON_DEAUTH_LEAVING, 4042 true, deauth_buf); 4043 ieee80211_report_disconnect(sdata, deauth_buf, 4044 sizeof(deauth_buf), true, 4045 WLAN_REASON_DEAUTH_LEAVING); 4046 return; 4047 } 4048 4049 if (sta && elems.opmode_notif) 4050 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4051 rx_status->band); 4052 mutex_unlock(&local->sta_mtx); 4053 4054 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4055 elems.country_elem, 4056 elems.country_elem_len, 4057 elems.pwr_constr_elem, 4058 elems.cisco_dtpc_elem); 4059 4060 ieee80211_bss_info_change_notify(sdata, changed); 4061 } 4062 4063 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4064 struct sk_buff *skb) 4065 { 4066 struct ieee80211_rx_status *rx_status; 4067 struct ieee80211_mgmt *mgmt; 4068 u16 fc; 4069 struct ieee802_11_elems elems; 4070 int ies_len; 4071 4072 rx_status = (struct ieee80211_rx_status *) skb->cb; 4073 mgmt = (struct ieee80211_mgmt *) skb->data; 4074 fc = le16_to_cpu(mgmt->frame_control); 4075 4076 sdata_lock(sdata); 4077 4078 switch (fc & IEEE80211_FCTL_STYPE) { 4079 case IEEE80211_STYPE_BEACON: 4080 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 4081 break; 4082 case IEEE80211_STYPE_PROBE_RESP: 4083 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4084 break; 4085 case IEEE80211_STYPE_AUTH: 4086 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4087 break; 4088 case IEEE80211_STYPE_DEAUTH: 4089 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4090 break; 4091 case IEEE80211_STYPE_DISASSOC: 4092 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4093 break; 4094 case IEEE80211_STYPE_ASSOC_RESP: 4095 case IEEE80211_STYPE_REASSOC_RESP: 4096 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4097 break; 4098 case IEEE80211_STYPE_ACTION: 4099 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4100 ies_len = skb->len - 4101 offsetof(struct ieee80211_mgmt, 4102 u.action.u.chan_switch.variable); 4103 4104 if (ies_len < 0) 4105 break; 4106 4107 /* CSA IE cannot be overridden, no need for BSSID */ 4108 ieee802_11_parse_elems( 4109 mgmt->u.action.u.chan_switch.variable, 4110 ies_len, true, &elems, mgmt->bssid, NULL); 4111 4112 if (elems.parse_error) 4113 break; 4114 4115 ieee80211_sta_process_chanswitch(sdata, 4116 rx_status->mactime, 4117 rx_status->device_timestamp, 4118 &elems, false); 4119 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4120 ies_len = skb->len - 4121 offsetof(struct ieee80211_mgmt, 4122 u.action.u.ext_chan_switch.variable); 4123 4124 if (ies_len < 0) 4125 break; 4126 4127 /* 4128 * extended CSA IE can't be overridden, no need for 4129 * BSSID 4130 */ 4131 ieee802_11_parse_elems( 4132 mgmt->u.action.u.ext_chan_switch.variable, 4133 ies_len, true, &elems, mgmt->bssid, NULL); 4134 4135 if (elems.parse_error) 4136 break; 4137 4138 /* for the handling code pretend this was also an IE */ 4139 elems.ext_chansw_ie = 4140 &mgmt->u.action.u.ext_chan_switch.data; 4141 4142 ieee80211_sta_process_chanswitch(sdata, 4143 rx_status->mactime, 4144 rx_status->device_timestamp, 4145 &elems, false); 4146 } 4147 break; 4148 } 4149 sdata_unlock(sdata); 4150 } 4151 4152 static void ieee80211_sta_timer(struct timer_list *t) 4153 { 4154 struct ieee80211_sub_if_data *sdata = 4155 from_timer(sdata, t, u.mgd.timer); 4156 4157 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4158 } 4159 4160 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4161 u8 *bssid, u8 reason, bool tx) 4162 { 4163 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4164 4165 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4166 tx, frame_buf); 4167 4168 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4169 reason); 4170 } 4171 4172 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4173 { 4174 struct ieee80211_local *local = sdata->local; 4175 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4176 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4177 u32 tx_flags = 0; 4178 u16 trans = 1; 4179 u16 status = 0; 4180 u16 prepare_tx_duration = 0; 4181 4182 sdata_assert_lock(sdata); 4183 4184 if (WARN_ON_ONCE(!auth_data)) 4185 return -EINVAL; 4186 4187 auth_data->tries++; 4188 4189 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4190 sdata_info(sdata, "authentication with %pM timed out\n", 4191 auth_data->bss->bssid); 4192 4193 /* 4194 * Most likely AP is not in the range so remove the 4195 * bss struct for that AP. 4196 */ 4197 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4198 4199 return -ETIMEDOUT; 4200 } 4201 4202 if (auth_data->algorithm == WLAN_AUTH_SAE) 4203 prepare_tx_duration = 4204 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4205 4206 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4207 4208 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4209 auth_data->bss->bssid, auth_data->tries, 4210 IEEE80211_AUTH_MAX_TRIES); 4211 4212 auth_data->expected_transaction = 2; 4213 4214 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4215 trans = auth_data->sae_trans; 4216 status = auth_data->sae_status; 4217 auth_data->expected_transaction = trans; 4218 } 4219 4220 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4221 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4222 IEEE80211_TX_INTFL_MLME_CONN_TX; 4223 4224 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4225 auth_data->data, auth_data->data_len, 4226 auth_data->bss->bssid, 4227 auth_data->bss->bssid, NULL, 0, 0, 4228 tx_flags); 4229 4230 if (tx_flags == 0) { 4231 if (auth_data->algorithm == WLAN_AUTH_SAE) 4232 auth_data->timeout = jiffies + 4233 IEEE80211_AUTH_TIMEOUT_SAE; 4234 else 4235 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4236 } else { 4237 auth_data->timeout = 4238 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4239 } 4240 4241 auth_data->timeout_started = true; 4242 run_again(sdata, auth_data->timeout); 4243 4244 return 0; 4245 } 4246 4247 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4248 { 4249 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4250 struct ieee80211_local *local = sdata->local; 4251 4252 sdata_assert_lock(sdata); 4253 4254 assoc_data->tries++; 4255 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4256 sdata_info(sdata, "association with %pM timed out\n", 4257 assoc_data->bss->bssid); 4258 4259 /* 4260 * Most likely AP is not in the range so remove the 4261 * bss struct for that AP. 4262 */ 4263 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4264 4265 return -ETIMEDOUT; 4266 } 4267 4268 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4269 assoc_data->bss->bssid, assoc_data->tries, 4270 IEEE80211_ASSOC_MAX_TRIES); 4271 ieee80211_send_assoc(sdata); 4272 4273 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4274 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4275 assoc_data->timeout_started = true; 4276 run_again(sdata, assoc_data->timeout); 4277 } else { 4278 assoc_data->timeout = 4279 round_jiffies_up(jiffies + 4280 IEEE80211_ASSOC_TIMEOUT_LONG); 4281 assoc_data->timeout_started = true; 4282 run_again(sdata, assoc_data->timeout); 4283 } 4284 4285 return 0; 4286 } 4287 4288 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4289 __le16 fc, bool acked) 4290 { 4291 struct ieee80211_local *local = sdata->local; 4292 4293 sdata->u.mgd.status_fc = fc; 4294 sdata->u.mgd.status_acked = acked; 4295 sdata->u.mgd.status_received = true; 4296 4297 ieee80211_queue_work(&local->hw, &sdata->work); 4298 } 4299 4300 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4301 { 4302 struct ieee80211_local *local = sdata->local; 4303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4304 4305 sdata_lock(sdata); 4306 4307 if (ifmgd->status_received) { 4308 __le16 fc = ifmgd->status_fc; 4309 bool status_acked = ifmgd->status_acked; 4310 4311 ifmgd->status_received = false; 4312 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4313 if (status_acked) { 4314 if (ifmgd->auth_data->algorithm == 4315 WLAN_AUTH_SAE) 4316 ifmgd->auth_data->timeout = 4317 jiffies + 4318 IEEE80211_AUTH_TIMEOUT_SAE; 4319 else 4320 ifmgd->auth_data->timeout = 4321 jiffies + 4322 IEEE80211_AUTH_TIMEOUT_SHORT; 4323 run_again(sdata, ifmgd->auth_data->timeout); 4324 } else { 4325 ifmgd->auth_data->timeout = jiffies - 1; 4326 } 4327 ifmgd->auth_data->timeout_started = true; 4328 } else if (ifmgd->assoc_data && 4329 (ieee80211_is_assoc_req(fc) || 4330 ieee80211_is_reassoc_req(fc))) { 4331 if (status_acked) { 4332 ifmgd->assoc_data->timeout = 4333 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4334 run_again(sdata, ifmgd->assoc_data->timeout); 4335 } else { 4336 ifmgd->assoc_data->timeout = jiffies - 1; 4337 } 4338 ifmgd->assoc_data->timeout_started = true; 4339 } 4340 } 4341 4342 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4343 time_after(jiffies, ifmgd->auth_data->timeout)) { 4344 if (ifmgd->auth_data->done) { 4345 /* 4346 * ok ... we waited for assoc but userspace didn't, 4347 * so let's just kill the auth data 4348 */ 4349 ieee80211_destroy_auth_data(sdata, false); 4350 } else if (ieee80211_auth(sdata)) { 4351 u8 bssid[ETH_ALEN]; 4352 struct ieee80211_event event = { 4353 .type = MLME_EVENT, 4354 .u.mlme.data = AUTH_EVENT, 4355 .u.mlme.status = MLME_TIMEOUT, 4356 }; 4357 4358 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4359 4360 ieee80211_destroy_auth_data(sdata, false); 4361 4362 cfg80211_auth_timeout(sdata->dev, bssid); 4363 drv_event_callback(sdata->local, sdata, &event); 4364 } 4365 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4366 run_again(sdata, ifmgd->auth_data->timeout); 4367 4368 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4369 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4370 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4371 ieee80211_do_assoc(sdata)) { 4372 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4373 struct ieee80211_event event = { 4374 .type = MLME_EVENT, 4375 .u.mlme.data = ASSOC_EVENT, 4376 .u.mlme.status = MLME_TIMEOUT, 4377 }; 4378 4379 ieee80211_destroy_assoc_data(sdata, false, false); 4380 cfg80211_assoc_timeout(sdata->dev, bss); 4381 drv_event_callback(sdata->local, sdata, &event); 4382 } 4383 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4384 run_again(sdata, ifmgd->assoc_data->timeout); 4385 4386 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4387 ifmgd->associated) { 4388 u8 bssid[ETH_ALEN]; 4389 int max_tries; 4390 4391 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4392 4393 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4394 max_tries = max_nullfunc_tries; 4395 else 4396 max_tries = max_probe_tries; 4397 4398 /* ACK received for nullfunc probing frame */ 4399 if (!ifmgd->probe_send_count) 4400 ieee80211_reset_ap_probe(sdata); 4401 else if (ifmgd->nullfunc_failed) { 4402 if (ifmgd->probe_send_count < max_tries) { 4403 mlme_dbg(sdata, 4404 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4405 bssid, ifmgd->probe_send_count, 4406 max_tries); 4407 ieee80211_mgd_probe_ap_send(sdata); 4408 } else { 4409 mlme_dbg(sdata, 4410 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4411 bssid); 4412 ieee80211_sta_connection_lost(sdata, bssid, 4413 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4414 false); 4415 } 4416 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4417 run_again(sdata, ifmgd->probe_timeout); 4418 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4419 mlme_dbg(sdata, 4420 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4421 bssid, probe_wait_ms); 4422 ieee80211_sta_connection_lost(sdata, bssid, 4423 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4424 } else if (ifmgd->probe_send_count < max_tries) { 4425 mlme_dbg(sdata, 4426 "No probe response from AP %pM after %dms, try %d/%i\n", 4427 bssid, probe_wait_ms, 4428 ifmgd->probe_send_count, max_tries); 4429 ieee80211_mgd_probe_ap_send(sdata); 4430 } else { 4431 /* 4432 * We actually lost the connection ... or did we? 4433 * Let's make sure! 4434 */ 4435 mlme_dbg(sdata, 4436 "No probe response from AP %pM after %dms, disconnecting.\n", 4437 bssid, probe_wait_ms); 4438 4439 ieee80211_sta_connection_lost(sdata, bssid, 4440 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4441 } 4442 } 4443 4444 sdata_unlock(sdata); 4445 } 4446 4447 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4448 { 4449 struct ieee80211_sub_if_data *sdata = 4450 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4452 4453 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4454 return; 4455 4456 sdata->u.mgd.connection_loss = false; 4457 ieee80211_queue_work(&sdata->local->hw, 4458 &sdata->u.mgd.beacon_connection_loss_work); 4459 } 4460 4461 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4462 { 4463 struct ieee80211_sub_if_data *sdata = 4464 from_timer(sdata, t, u.mgd.conn_mon_timer); 4465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4466 struct ieee80211_local *local = sdata->local; 4467 4468 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4469 return; 4470 4471 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4472 } 4473 4474 static void ieee80211_sta_monitor_work(struct work_struct *work) 4475 { 4476 struct ieee80211_sub_if_data *sdata = 4477 container_of(work, struct ieee80211_sub_if_data, 4478 u.mgd.monitor_work); 4479 4480 ieee80211_mgd_probe_ap(sdata, false); 4481 } 4482 4483 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4484 { 4485 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4486 __ieee80211_stop_poll(sdata); 4487 4488 /* let's probe the connection once */ 4489 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4490 ieee80211_queue_work(&sdata->local->hw, 4491 &sdata->u.mgd.monitor_work); 4492 } 4493 } 4494 4495 #ifdef CONFIG_PM 4496 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4497 { 4498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4499 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4500 4501 sdata_lock(sdata); 4502 4503 if (ifmgd->auth_data || ifmgd->assoc_data) { 4504 const u8 *bssid = ifmgd->auth_data ? 4505 ifmgd->auth_data->bss->bssid : 4506 ifmgd->assoc_data->bss->bssid; 4507 4508 /* 4509 * If we are trying to authenticate / associate while suspending, 4510 * cfg80211 won't know and won't actually abort those attempts, 4511 * thus we need to do that ourselves. 4512 */ 4513 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4514 IEEE80211_STYPE_DEAUTH, 4515 WLAN_REASON_DEAUTH_LEAVING, 4516 false, frame_buf); 4517 if (ifmgd->assoc_data) 4518 ieee80211_destroy_assoc_data(sdata, false, true); 4519 if (ifmgd->auth_data) 4520 ieee80211_destroy_auth_data(sdata, false); 4521 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4522 IEEE80211_DEAUTH_FRAME_LEN); 4523 } 4524 4525 /* This is a bit of a hack - we should find a better and more generic 4526 * solution to this. Normally when suspending, cfg80211 will in fact 4527 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4528 * auth (not so important) or assoc (this is the problem) process. 4529 * 4530 * As a consequence, it can happen that we are in the process of both 4531 * associating and suspending, and receive an association response 4532 * after cfg80211 has checked if it needs to disconnect, but before 4533 * we actually set the flag to drop incoming frames. This will then 4534 * cause the workqueue flush to process the association response in 4535 * the suspend, resulting in a successful association just before it 4536 * tries to remove the interface from the driver, which now though 4537 * has a channel context assigned ... this results in issues. 4538 * 4539 * To work around this (for now) simply deauth here again if we're 4540 * now connected. 4541 */ 4542 if (ifmgd->associated && !sdata->local->wowlan) { 4543 u8 bssid[ETH_ALEN]; 4544 struct cfg80211_deauth_request req = { 4545 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4546 .bssid = bssid, 4547 }; 4548 4549 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4550 ieee80211_mgd_deauth(sdata, &req); 4551 } 4552 4553 sdata_unlock(sdata); 4554 } 4555 4556 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4557 { 4558 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4559 4560 sdata_lock(sdata); 4561 if (!ifmgd->associated) { 4562 sdata_unlock(sdata); 4563 return; 4564 } 4565 4566 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4567 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4568 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4569 ieee80211_sta_connection_lost(sdata, 4570 ifmgd->associated->bssid, 4571 WLAN_REASON_UNSPECIFIED, 4572 true); 4573 sdata_unlock(sdata); 4574 return; 4575 } 4576 sdata_unlock(sdata); 4577 } 4578 #endif 4579 4580 /* interface setup */ 4581 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4582 { 4583 struct ieee80211_if_managed *ifmgd; 4584 4585 ifmgd = &sdata->u.mgd; 4586 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4587 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4588 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4589 ieee80211_beacon_connection_loss_work); 4590 INIT_WORK(&ifmgd->csa_connection_drop_work, 4591 ieee80211_csa_connection_drop_work); 4592 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4593 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4594 ieee80211_tdls_peer_del_work); 4595 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4596 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4597 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4598 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4599 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4600 ieee80211_sta_handle_tspec_ac_params_wk); 4601 4602 ifmgd->flags = 0; 4603 ifmgd->powersave = sdata->wdev.ps; 4604 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4605 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4606 ifmgd->p2p_noa_index = -1; 4607 4608 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4609 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4610 else 4611 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4612 4613 /* Setup TDLS data */ 4614 spin_lock_init(&ifmgd->teardown_lock); 4615 ifmgd->teardown_skb = NULL; 4616 ifmgd->orig_teardown_skb = NULL; 4617 } 4618 4619 /* scan finished notification */ 4620 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4621 { 4622 struct ieee80211_sub_if_data *sdata; 4623 4624 /* Restart STA timers */ 4625 rcu_read_lock(); 4626 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4627 if (ieee80211_sdata_running(sdata)) 4628 ieee80211_restart_sta_timer(sdata); 4629 } 4630 rcu_read_unlock(); 4631 } 4632 4633 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4634 struct cfg80211_bss *cbss) 4635 { 4636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4637 const u8 *ht_cap_ie, *vht_cap_ie; 4638 const struct ieee80211_ht_cap *ht_cap; 4639 const struct ieee80211_vht_cap *vht_cap; 4640 u8 chains = 1; 4641 4642 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4643 return chains; 4644 4645 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4646 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4647 ht_cap = (void *)(ht_cap_ie + 2); 4648 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4649 /* 4650 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4651 * "Tx Unequal Modulation Supported" fields. 4652 */ 4653 } 4654 4655 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4656 return chains; 4657 4658 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4659 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4660 u8 nss; 4661 u16 tx_mcs_map; 4662 4663 vht_cap = (void *)(vht_cap_ie + 2); 4664 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4665 for (nss = 8; nss > 0; nss--) { 4666 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4667 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4668 break; 4669 } 4670 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4671 chains = max(chains, nss); 4672 } 4673 4674 return chains; 4675 } 4676 4677 static bool 4678 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4679 const struct ieee80211_he_operation *he_op) 4680 { 4681 const struct ieee80211_sta_he_cap *sta_he_cap = 4682 ieee80211_get_he_sta_cap(sband); 4683 u16 ap_min_req_set; 4684 int i; 4685 4686 if (!sta_he_cap || !he_op) 4687 return false; 4688 4689 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4690 4691 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4692 for (i = 0; i < 3; i++) { 4693 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4694 &sta_he_cap->he_mcs_nss_supp; 4695 u16 sta_mcs_map_rx = 4696 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4697 u16 sta_mcs_map_tx = 4698 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4699 u8 nss; 4700 bool verified = true; 4701 4702 /* 4703 * For each band there is a maximum of 8 spatial streams 4704 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4705 * of 2 bits per NSS (1-8), with the values defined in enum 4706 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4707 * capabilities aren't less than the AP's minimum requirements 4708 * for this HE BSS per SS. 4709 * It is enough to find one such band that meets the reqs. 4710 */ 4711 for (nss = 8; nss > 0; nss--) { 4712 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4713 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4714 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4715 4716 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4717 continue; 4718 4719 /* 4720 * Make sure the HE AP doesn't require MCSs that aren't 4721 * supported by the client 4722 */ 4723 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4724 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4725 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4726 verified = false; 4727 break; 4728 } 4729 } 4730 4731 if (verified) 4732 return true; 4733 } 4734 4735 /* If here, STA doesn't meet AP's HE min requirements */ 4736 return false; 4737 } 4738 4739 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4740 struct cfg80211_bss *cbss) 4741 { 4742 struct ieee80211_local *local = sdata->local; 4743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4744 const struct ieee80211_ht_cap *ht_cap = NULL; 4745 const struct ieee80211_ht_operation *ht_oper = NULL; 4746 const struct ieee80211_vht_operation *vht_oper = NULL; 4747 const struct ieee80211_he_operation *he_oper = NULL; 4748 struct ieee80211_supported_band *sband; 4749 struct cfg80211_chan_def chandef; 4750 int ret; 4751 u32 i; 4752 bool have_80mhz; 4753 4754 sband = local->hw.wiphy->bands[cbss->channel->band]; 4755 4756 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4757 IEEE80211_STA_DISABLE_80P80MHZ | 4758 IEEE80211_STA_DISABLE_160MHZ); 4759 4760 rcu_read_lock(); 4761 4762 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4763 sband->ht_cap.ht_supported) { 4764 const u8 *ht_oper_ie, *ht_cap_ie; 4765 4766 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4767 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4768 ht_oper = (void *)(ht_oper_ie + 2); 4769 4770 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4771 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4772 ht_cap = (void *)(ht_cap_ie + 2); 4773 4774 if (!ht_cap) { 4775 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4776 ht_oper = NULL; 4777 } 4778 } 4779 4780 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4781 sband->vht_cap.vht_supported) { 4782 const u8 *vht_oper_ie, *vht_cap; 4783 4784 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4785 WLAN_EID_VHT_OPERATION); 4786 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4787 vht_oper = (void *)(vht_oper_ie + 2); 4788 if (vht_oper && !ht_oper) { 4789 vht_oper = NULL; 4790 sdata_info(sdata, 4791 "AP advertised VHT without HT, disabling both\n"); 4792 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4793 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4794 } 4795 4796 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4797 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4798 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4799 vht_oper = NULL; 4800 } 4801 } 4802 4803 if (!ieee80211_get_he_sta_cap(sband)) 4804 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4805 4806 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 4807 const struct cfg80211_bss_ies *ies; 4808 const u8 *he_oper_ie; 4809 4810 ies = rcu_dereference(cbss->ies); 4811 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4812 ies->data, ies->len); 4813 if (he_oper_ie && 4814 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4815 he_oper = (void *)(he_oper_ie + 3); 4816 else 4817 he_oper = NULL; 4818 4819 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4820 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4821 } 4822 4823 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4824 have_80mhz = false; 4825 for (i = 0; i < sband->n_channels; i++) { 4826 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4827 IEEE80211_CHAN_NO_80MHZ)) 4828 continue; 4829 4830 have_80mhz = true; 4831 break; 4832 } 4833 4834 if (!have_80mhz) 4835 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4836 4837 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4838 cbss->channel, 4839 ht_oper, vht_oper, he_oper, 4840 &chandef, false); 4841 4842 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4843 local->rx_chains); 4844 4845 rcu_read_unlock(); 4846 4847 /* will change later if needed */ 4848 sdata->smps_mode = IEEE80211_SMPS_OFF; 4849 4850 mutex_lock(&local->mtx); 4851 /* 4852 * If this fails (possibly due to channel context sharing 4853 * on incompatible channels, e.g. 80+80 and 160 sharing the 4854 * same control channel) try to use a smaller bandwidth. 4855 */ 4856 ret = ieee80211_vif_use_channel(sdata, &chandef, 4857 IEEE80211_CHANCTX_SHARED); 4858 4859 /* don't downgrade for 5 and 10 MHz channels, though. */ 4860 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4861 chandef.width == NL80211_CHAN_WIDTH_10) 4862 goto out; 4863 4864 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4865 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4866 ret = ieee80211_vif_use_channel(sdata, &chandef, 4867 IEEE80211_CHANCTX_SHARED); 4868 } 4869 out: 4870 mutex_unlock(&local->mtx); 4871 return ret; 4872 } 4873 4874 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4875 u8 *dtim_count, u8 *dtim_period) 4876 { 4877 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4878 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4879 ies->len); 4880 const struct ieee80211_tim_ie *tim = NULL; 4881 const struct ieee80211_bssid_index *idx; 4882 bool valid = tim_ie && tim_ie[1] >= 2; 4883 4884 if (valid) 4885 tim = (void *)(tim_ie + 2); 4886 4887 if (dtim_count) 4888 *dtim_count = valid ? tim->dtim_count : 0; 4889 4890 if (dtim_period) 4891 *dtim_period = valid ? tim->dtim_period : 0; 4892 4893 /* Check if value is overridden by non-transmitted profile */ 4894 if (!idx_ie || idx_ie[1] < 3) 4895 return valid; 4896 4897 idx = (void *)(idx_ie + 2); 4898 4899 if (dtim_count) 4900 *dtim_count = idx->dtim_count; 4901 4902 if (dtim_period) 4903 *dtim_period = idx->dtim_period; 4904 4905 return true; 4906 } 4907 4908 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4909 struct cfg80211_bss *cbss, bool assoc, 4910 bool override) 4911 { 4912 struct ieee80211_local *local = sdata->local; 4913 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4914 struct ieee80211_bss *bss = (void *)cbss->priv; 4915 struct sta_info *new_sta = NULL; 4916 struct ieee80211_supported_band *sband; 4917 bool have_sta = false; 4918 int err; 4919 4920 sband = local->hw.wiphy->bands[cbss->channel->band]; 4921 4922 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4923 return -EINVAL; 4924 4925 /* If a reconfig is happening, bail out */ 4926 if (local->in_reconfig) 4927 return -EBUSY; 4928 4929 if (assoc) { 4930 rcu_read_lock(); 4931 have_sta = sta_info_get(sdata, cbss->bssid); 4932 rcu_read_unlock(); 4933 } 4934 4935 if (!have_sta) { 4936 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4937 if (!new_sta) 4938 return -ENOMEM; 4939 } 4940 4941 /* 4942 * Set up the information for the new channel before setting the 4943 * new channel. We can't - completely race-free - change the basic 4944 * rates bitmap and the channel (sband) that it refers to, but if 4945 * we set it up before we at least avoid calling into the driver's 4946 * bss_info_changed() method with invalid information (since we do 4947 * call that from changing the channel - only for IDLE and perhaps 4948 * some others, but ...). 4949 * 4950 * So to avoid that, just set up all the new information before the 4951 * channel, but tell the driver to apply it only afterwards, since 4952 * it might need the new channel for that. 4953 */ 4954 if (new_sta) { 4955 u32 rates = 0, basic_rates = 0; 4956 bool have_higher_than_11mbit; 4957 int min_rate = INT_MAX, min_rate_index = -1; 4958 const struct cfg80211_bss_ies *ies; 4959 int shift = ieee80211_vif_get_shift(&sdata->vif); 4960 4961 ieee80211_get_rates(sband, bss->supp_rates, 4962 bss->supp_rates_len, 4963 &rates, &basic_rates, 4964 &have_higher_than_11mbit, 4965 &min_rate, &min_rate_index, 4966 shift); 4967 4968 /* 4969 * This used to be a workaround for basic rates missing 4970 * in the association response frame. Now that we no 4971 * longer use the basic rates from there, it probably 4972 * doesn't happen any more, but keep the workaround so 4973 * in case some *other* APs are buggy in different ways 4974 * we can connect -- with a warning. 4975 */ 4976 if (!basic_rates && min_rate_index >= 0) { 4977 sdata_info(sdata, 4978 "No basic rates, using min rate instead\n"); 4979 basic_rates = BIT(min_rate_index); 4980 } 4981 4982 if (rates) 4983 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4984 else 4985 sdata_info(sdata, 4986 "No rates found, keeping mandatory only\n"); 4987 4988 sdata->vif.bss_conf.basic_rates = basic_rates; 4989 4990 /* cf. IEEE 802.11 9.2.12 */ 4991 if (cbss->channel->band == NL80211_BAND_2GHZ && 4992 have_higher_than_11mbit) 4993 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4994 else 4995 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4996 4997 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4998 4999 /* set timing information */ 5000 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5001 rcu_read_lock(); 5002 ies = rcu_dereference(cbss->beacon_ies); 5003 if (ies) { 5004 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5005 sdata->vif.bss_conf.sync_device_ts = 5006 bss->device_ts_beacon; 5007 5008 ieee80211_get_dtim(ies, 5009 &sdata->vif.bss_conf.sync_dtim_count, 5010 NULL); 5011 } else if (!ieee80211_hw_check(&sdata->local->hw, 5012 TIMING_BEACON_ONLY)) { 5013 ies = rcu_dereference(cbss->proberesp_ies); 5014 /* must be non-NULL since beacon IEs were NULL */ 5015 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5016 sdata->vif.bss_conf.sync_device_ts = 5017 bss->device_ts_presp; 5018 sdata->vif.bss_conf.sync_dtim_count = 0; 5019 } else { 5020 sdata->vif.bss_conf.sync_tsf = 0; 5021 sdata->vif.bss_conf.sync_device_ts = 0; 5022 sdata->vif.bss_conf.sync_dtim_count = 0; 5023 } 5024 rcu_read_unlock(); 5025 } 5026 5027 if (new_sta || override) { 5028 err = ieee80211_prep_channel(sdata, cbss); 5029 if (err) { 5030 if (new_sta) 5031 sta_info_free(local, new_sta); 5032 return -EINVAL; 5033 } 5034 } 5035 5036 if (new_sta) { 5037 /* 5038 * tell driver about BSSID, basic rates and timing 5039 * this was set up above, before setting the channel 5040 */ 5041 ieee80211_bss_info_change_notify(sdata, 5042 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5043 BSS_CHANGED_BEACON_INT); 5044 5045 if (assoc) 5046 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5047 5048 err = sta_info_insert(new_sta); 5049 new_sta = NULL; 5050 if (err) { 5051 sdata_info(sdata, 5052 "failed to insert STA entry for the AP (error %d)\n", 5053 err); 5054 return err; 5055 } 5056 } else 5057 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5058 5059 /* Cancel scan to ensure that nothing interferes with connection */ 5060 if (local->scanning) 5061 ieee80211_scan_cancel(local); 5062 5063 return 0; 5064 } 5065 5066 /* config hooks */ 5067 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5068 struct cfg80211_auth_request *req) 5069 { 5070 struct ieee80211_local *local = sdata->local; 5071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5072 struct ieee80211_mgd_auth_data *auth_data; 5073 u16 auth_alg; 5074 int err; 5075 bool cont_auth; 5076 5077 /* prepare auth data structure */ 5078 5079 switch (req->auth_type) { 5080 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5081 auth_alg = WLAN_AUTH_OPEN; 5082 break; 5083 case NL80211_AUTHTYPE_SHARED_KEY: 5084 if (fips_enabled) 5085 return -EOPNOTSUPP; 5086 auth_alg = WLAN_AUTH_SHARED_KEY; 5087 break; 5088 case NL80211_AUTHTYPE_FT: 5089 auth_alg = WLAN_AUTH_FT; 5090 break; 5091 case NL80211_AUTHTYPE_NETWORK_EAP: 5092 auth_alg = WLAN_AUTH_LEAP; 5093 break; 5094 case NL80211_AUTHTYPE_SAE: 5095 auth_alg = WLAN_AUTH_SAE; 5096 break; 5097 case NL80211_AUTHTYPE_FILS_SK: 5098 auth_alg = WLAN_AUTH_FILS_SK; 5099 break; 5100 case NL80211_AUTHTYPE_FILS_SK_PFS: 5101 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5102 break; 5103 case NL80211_AUTHTYPE_FILS_PK: 5104 auth_alg = WLAN_AUTH_FILS_PK; 5105 break; 5106 default: 5107 return -EOPNOTSUPP; 5108 } 5109 5110 if (ifmgd->assoc_data) 5111 return -EBUSY; 5112 5113 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5114 req->ie_len, GFP_KERNEL); 5115 if (!auth_data) 5116 return -ENOMEM; 5117 5118 auth_data->bss = req->bss; 5119 5120 if (req->auth_data_len >= 4) { 5121 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5122 __le16 *pos = (__le16 *) req->auth_data; 5123 5124 auth_data->sae_trans = le16_to_cpu(pos[0]); 5125 auth_data->sae_status = le16_to_cpu(pos[1]); 5126 } 5127 memcpy(auth_data->data, req->auth_data + 4, 5128 req->auth_data_len - 4); 5129 auth_data->data_len += req->auth_data_len - 4; 5130 } 5131 5132 /* Check if continuing authentication or trying to authenticate with the 5133 * same BSS that we were in the process of authenticating with and avoid 5134 * removal and re-addition of the STA entry in 5135 * ieee80211_prep_connection(). 5136 */ 5137 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5138 5139 if (req->ie && req->ie_len) { 5140 memcpy(&auth_data->data[auth_data->data_len], 5141 req->ie, req->ie_len); 5142 auth_data->data_len += req->ie_len; 5143 } 5144 5145 if (req->key && req->key_len) { 5146 auth_data->key_len = req->key_len; 5147 auth_data->key_idx = req->key_idx; 5148 memcpy(auth_data->key, req->key, req->key_len); 5149 } 5150 5151 auth_data->algorithm = auth_alg; 5152 5153 /* try to authenticate/probe */ 5154 5155 if (ifmgd->auth_data) { 5156 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5157 auth_data->peer_confirmed = 5158 ifmgd->auth_data->peer_confirmed; 5159 } 5160 ieee80211_destroy_auth_data(sdata, cont_auth); 5161 } 5162 5163 /* prep auth_data so we don't go into idle on disassoc */ 5164 ifmgd->auth_data = auth_data; 5165 5166 /* If this is continuation of an ongoing SAE authentication exchange 5167 * (i.e., request to send SAE Confirm) and the peer has already 5168 * confirmed, mark authentication completed since we are about to send 5169 * out SAE Confirm. 5170 */ 5171 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5172 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5173 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5174 5175 if (ifmgd->associated) { 5176 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5177 5178 sdata_info(sdata, 5179 "disconnect from AP %pM for new auth to %pM\n", 5180 ifmgd->associated->bssid, req->bss->bssid); 5181 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5182 WLAN_REASON_UNSPECIFIED, 5183 false, frame_buf); 5184 5185 ieee80211_report_disconnect(sdata, frame_buf, 5186 sizeof(frame_buf), true, 5187 WLAN_REASON_UNSPECIFIED); 5188 } 5189 5190 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5191 5192 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5193 if (err) 5194 goto err_clear; 5195 5196 err = ieee80211_auth(sdata); 5197 if (err) { 5198 sta_info_destroy_addr(sdata, req->bss->bssid); 5199 goto err_clear; 5200 } 5201 5202 /* hold our own reference */ 5203 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5204 return 0; 5205 5206 err_clear: 5207 eth_zero_addr(ifmgd->bssid); 5208 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5209 ifmgd->auth_data = NULL; 5210 mutex_lock(&sdata->local->mtx); 5211 ieee80211_vif_release_channel(sdata); 5212 mutex_unlock(&sdata->local->mtx); 5213 kfree(auth_data); 5214 return err; 5215 } 5216 5217 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5218 struct cfg80211_assoc_request *req) 5219 { 5220 struct ieee80211_local *local = sdata->local; 5221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5222 struct ieee80211_bss *bss = (void *)req->bss->priv; 5223 struct ieee80211_mgd_assoc_data *assoc_data; 5224 const struct cfg80211_bss_ies *beacon_ies; 5225 struct ieee80211_supported_band *sband; 5226 const u8 *ssidie, *ht_ie, *vht_ie; 5227 int i, err; 5228 bool override = false; 5229 5230 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5231 if (!assoc_data) 5232 return -ENOMEM; 5233 5234 rcu_read_lock(); 5235 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5236 if (!ssidie) { 5237 rcu_read_unlock(); 5238 kfree(assoc_data); 5239 return -EINVAL; 5240 } 5241 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5242 assoc_data->ssid_len = ssidie[1]; 5243 rcu_read_unlock(); 5244 5245 if (ifmgd->associated) { 5246 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5247 5248 sdata_info(sdata, 5249 "disconnect from AP %pM for new assoc to %pM\n", 5250 ifmgd->associated->bssid, req->bss->bssid); 5251 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5252 WLAN_REASON_UNSPECIFIED, 5253 false, frame_buf); 5254 5255 ieee80211_report_disconnect(sdata, frame_buf, 5256 sizeof(frame_buf), true, 5257 WLAN_REASON_UNSPECIFIED); 5258 } 5259 5260 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5261 err = -EBUSY; 5262 goto err_free; 5263 } 5264 5265 if (ifmgd->assoc_data) { 5266 err = -EBUSY; 5267 goto err_free; 5268 } 5269 5270 if (ifmgd->auth_data) { 5271 bool match; 5272 5273 /* keep sta info, bssid if matching */ 5274 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5275 ieee80211_destroy_auth_data(sdata, match); 5276 } 5277 5278 /* prepare assoc data */ 5279 5280 ifmgd->beacon_crc_valid = false; 5281 5282 assoc_data->wmm = bss->wmm_used && 5283 (local->hw.queues >= IEEE80211_NUM_ACS); 5284 5285 /* 5286 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5287 * We still associate in non-HT mode (11a/b/g) if any one of these 5288 * ciphers is configured as pairwise. 5289 * We can set this to true for non-11n hardware, that'll be checked 5290 * separately along with the peer capabilities. 5291 */ 5292 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5293 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5294 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5295 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5296 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5297 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5298 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5299 netdev_info(sdata->dev, 5300 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5301 } 5302 } 5303 5304 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5305 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5306 if (!sband->ht_cap.ht_supported || 5307 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5308 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5309 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5310 if (!bss->wmm_used && 5311 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5312 netdev_info(sdata->dev, 5313 "disabling HT as WMM/QoS is not supported by the AP\n"); 5314 } 5315 5316 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5317 if (!sband->vht_cap.vht_supported || 5318 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5319 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5320 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5321 if (!bss->wmm_used && 5322 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5323 netdev_info(sdata->dev, 5324 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5325 } 5326 5327 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5328 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5329 sizeof(ifmgd->ht_capa_mask)); 5330 5331 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5332 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5333 sizeof(ifmgd->vht_capa_mask)); 5334 5335 if (req->ie && req->ie_len) { 5336 memcpy(assoc_data->ie, req->ie, req->ie_len); 5337 assoc_data->ie_len = req->ie_len; 5338 } 5339 5340 if (req->fils_kek) { 5341 /* should already be checked in cfg80211 - so warn */ 5342 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5343 err = -EINVAL; 5344 goto err_free; 5345 } 5346 memcpy(assoc_data->fils_kek, req->fils_kek, 5347 req->fils_kek_len); 5348 assoc_data->fils_kek_len = req->fils_kek_len; 5349 } 5350 5351 if (req->fils_nonces) 5352 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5353 2 * FILS_NONCE_LEN); 5354 5355 assoc_data->bss = req->bss; 5356 5357 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5358 if (ifmgd->powersave) 5359 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5360 else 5361 sdata->smps_mode = IEEE80211_SMPS_OFF; 5362 } else 5363 sdata->smps_mode = ifmgd->req_smps; 5364 5365 assoc_data->capability = req->bss->capability; 5366 assoc_data->supp_rates = bss->supp_rates; 5367 assoc_data->supp_rates_len = bss->supp_rates_len; 5368 5369 rcu_read_lock(); 5370 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5371 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5372 assoc_data->ap_ht_param = 5373 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5374 else 5375 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5376 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5377 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5378 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5379 sizeof(struct ieee80211_vht_cap)); 5380 else 5381 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5382 rcu_read_unlock(); 5383 5384 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5385 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5386 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5387 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5388 5389 if (bss->wmm_used && bss->uapsd_supported && 5390 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5391 assoc_data->uapsd = true; 5392 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5393 } else { 5394 assoc_data->uapsd = false; 5395 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5396 } 5397 5398 if (req->prev_bssid) 5399 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5400 5401 if (req->use_mfp) { 5402 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5403 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5404 } else { 5405 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5406 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5407 } 5408 5409 if (req->flags & ASSOC_REQ_USE_RRM) 5410 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5411 else 5412 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5413 5414 if (req->crypto.control_port) 5415 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5416 else 5417 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5418 5419 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5420 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5421 sdata->control_port_over_nl80211 = 5422 req->crypto.control_port_over_nl80211; 5423 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5424 sdata->vif.type); 5425 5426 /* kick off associate process */ 5427 5428 ifmgd->assoc_data = assoc_data; 5429 ifmgd->dtim_period = 0; 5430 ifmgd->have_beacon = false; 5431 5432 /* override HT/VHT configuration only if the AP and we support it */ 5433 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5434 struct ieee80211_sta_ht_cap sta_ht_cap; 5435 5436 if (req->flags & ASSOC_REQ_DISABLE_HT) 5437 override = true; 5438 5439 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5440 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5441 5442 /* check for 40 MHz disable override */ 5443 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5444 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5445 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5446 override = true; 5447 5448 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5449 req->flags & ASSOC_REQ_DISABLE_VHT) 5450 override = true; 5451 } 5452 5453 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5454 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5455 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5456 } 5457 5458 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5459 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5460 5461 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5462 if (err) 5463 goto err_clear; 5464 5465 rcu_read_lock(); 5466 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5467 5468 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5469 !beacon_ies) { 5470 /* 5471 * Wait up to one beacon interval ... 5472 * should this be more if we miss one? 5473 */ 5474 sdata_info(sdata, "waiting for beacon from %pM\n", 5475 ifmgd->bssid); 5476 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5477 assoc_data->timeout_started = true; 5478 assoc_data->need_beacon = true; 5479 } else if (beacon_ies) { 5480 const u8 *ie; 5481 u8 dtim_count = 0; 5482 5483 ieee80211_get_dtim(beacon_ies, &dtim_count, 5484 &ifmgd->dtim_period); 5485 5486 ifmgd->have_beacon = true; 5487 assoc_data->timeout = jiffies; 5488 assoc_data->timeout_started = true; 5489 5490 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5491 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5492 sdata->vif.bss_conf.sync_device_ts = 5493 bss->device_ts_beacon; 5494 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5495 } 5496 5497 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5498 beacon_ies->data, beacon_ies->len); 5499 if (ie && ie[1] >= 3) 5500 sdata->vif.bss_conf.profile_periodicity = ie[4]; 5501 5502 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, 5503 beacon_ies->data, beacon_ies->len); 5504 if (ie && ie[1] >= 11 && 5505 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5506 sdata->vif.bss_conf.ema_ap = true; 5507 } else { 5508 assoc_data->timeout = jiffies; 5509 assoc_data->timeout_started = true; 5510 } 5511 rcu_read_unlock(); 5512 5513 run_again(sdata, assoc_data->timeout); 5514 5515 if (bss->corrupt_data) { 5516 char *corrupt_type = "data"; 5517 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5518 if (bss->corrupt_data & 5519 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5520 corrupt_type = "beacon and probe response"; 5521 else 5522 corrupt_type = "beacon"; 5523 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5524 corrupt_type = "probe response"; 5525 sdata_info(sdata, "associating with AP with corrupt %s\n", 5526 corrupt_type); 5527 } 5528 5529 return 0; 5530 err_clear: 5531 eth_zero_addr(ifmgd->bssid); 5532 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5533 ifmgd->assoc_data = NULL; 5534 err_free: 5535 kfree(assoc_data); 5536 return err; 5537 } 5538 5539 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5540 struct cfg80211_deauth_request *req) 5541 { 5542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5543 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5544 bool tx = !req->local_state_change; 5545 5546 if (ifmgd->auth_data && 5547 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5548 sdata_info(sdata, 5549 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5550 req->bssid, req->reason_code, 5551 ieee80211_get_reason_code_string(req->reason_code)); 5552 5553 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5554 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5555 IEEE80211_STYPE_DEAUTH, 5556 req->reason_code, tx, 5557 frame_buf); 5558 ieee80211_destroy_auth_data(sdata, false); 5559 ieee80211_report_disconnect(sdata, frame_buf, 5560 sizeof(frame_buf), true, 5561 req->reason_code); 5562 5563 return 0; 5564 } 5565 5566 if (ifmgd->assoc_data && 5567 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5568 sdata_info(sdata, 5569 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5570 req->bssid, req->reason_code, 5571 ieee80211_get_reason_code_string(req->reason_code)); 5572 5573 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5574 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5575 IEEE80211_STYPE_DEAUTH, 5576 req->reason_code, tx, 5577 frame_buf); 5578 ieee80211_destroy_assoc_data(sdata, false, true); 5579 ieee80211_report_disconnect(sdata, frame_buf, 5580 sizeof(frame_buf), true, 5581 req->reason_code); 5582 return 0; 5583 } 5584 5585 if (ifmgd->associated && 5586 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5587 sdata_info(sdata, 5588 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5589 req->bssid, req->reason_code, 5590 ieee80211_get_reason_code_string(req->reason_code)); 5591 5592 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5593 req->reason_code, tx, frame_buf); 5594 ieee80211_report_disconnect(sdata, frame_buf, 5595 sizeof(frame_buf), true, 5596 req->reason_code); 5597 return 0; 5598 } 5599 5600 return -ENOTCONN; 5601 } 5602 5603 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5604 struct cfg80211_disassoc_request *req) 5605 { 5606 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5607 u8 bssid[ETH_ALEN]; 5608 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5609 5610 /* 5611 * cfg80211 should catch this ... but it's racy since 5612 * we can receive a disassoc frame, process it, hand it 5613 * to cfg80211 while that's in a locked section already 5614 * trying to tell us that the user wants to disconnect. 5615 */ 5616 if (ifmgd->associated != req->bss) 5617 return -ENOLINK; 5618 5619 sdata_info(sdata, 5620 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5621 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5622 5623 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5624 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5625 req->reason_code, !req->local_state_change, 5626 frame_buf); 5627 5628 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5629 req->reason_code); 5630 5631 return 0; 5632 } 5633 5634 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5635 { 5636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5637 5638 /* 5639 * Make sure some work items will not run after this, 5640 * they will not do anything but might not have been 5641 * cancelled when disconnecting. 5642 */ 5643 cancel_work_sync(&ifmgd->monitor_work); 5644 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5645 cancel_work_sync(&ifmgd->request_smps_work); 5646 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5647 cancel_work_sync(&ifmgd->chswitch_work); 5648 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5649 5650 sdata_lock(sdata); 5651 if (ifmgd->assoc_data) { 5652 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5653 ieee80211_destroy_assoc_data(sdata, false, false); 5654 cfg80211_assoc_timeout(sdata->dev, bss); 5655 } 5656 if (ifmgd->auth_data) 5657 ieee80211_destroy_auth_data(sdata, false); 5658 spin_lock_bh(&ifmgd->teardown_lock); 5659 if (ifmgd->teardown_skb) { 5660 kfree_skb(ifmgd->teardown_skb); 5661 ifmgd->teardown_skb = NULL; 5662 ifmgd->orig_teardown_skb = NULL; 5663 } 5664 kfree(ifmgd->assoc_req_ies); 5665 ifmgd->assoc_req_ies = NULL; 5666 ifmgd->assoc_req_ies_len = 0; 5667 spin_unlock_bh(&ifmgd->teardown_lock); 5668 del_timer_sync(&ifmgd->timer); 5669 sdata_unlock(sdata); 5670 } 5671 5672 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5673 enum nl80211_cqm_rssi_threshold_event rssi_event, 5674 s32 rssi_level, 5675 gfp_t gfp) 5676 { 5677 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5678 5679 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5680 5681 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5682 } 5683 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5684 5685 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5686 { 5687 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5688 5689 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5690 5691 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5692 } 5693 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5694