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 - 2020 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 u32 vht_cap_info, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 const struct ieee80211_he_operation *he_oper, 152 struct cfg80211_chan_def *chandef, bool tracking) 153 { 154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 155 struct cfg80211_chan_def vht_chandef; 156 struct ieee80211_sta_ht_cap sta_ht_cap; 157 u32 ht_cfreq, ret; 158 159 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 160 chandef->chan = channel; 161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 162 chandef->center_freq1 = channel->center_freq; 163 chandef->freq1_offset = channel->freq_offset; 164 165 if (channel->band == NL80211_BAND_6GHZ) { 166 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) 167 ret = IEEE80211_STA_DISABLE_HT | 168 IEEE80211_STA_DISABLE_VHT | 169 IEEE80211_STA_DISABLE_HE; 170 else 171 ret = 0; 172 vht_chandef = *chandef; 173 goto out; 174 } 175 176 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 177 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 178 179 if (!ht_oper || !sta_ht_cap.ht_supported) { 180 ret = IEEE80211_STA_DISABLE_HT | 181 IEEE80211_STA_DISABLE_VHT | 182 IEEE80211_STA_DISABLE_HE; 183 goto out; 184 } 185 186 chandef->width = NL80211_CHAN_WIDTH_20; 187 188 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 189 channel->band); 190 /* check that channel matches the right operating channel */ 191 if (!tracking && channel->center_freq != ht_cfreq) { 192 /* 193 * It's possible that some APs are confused here; 194 * Netgear WNDR3700 sometimes reports 4 higher than 195 * the actual channel in association responses, but 196 * since we look at probe response/beacon data here 197 * it should be OK. 198 */ 199 sdata_info(sdata, 200 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 201 channel->center_freq, ht_cfreq, 202 ht_oper->primary_chan, channel->band); 203 ret = IEEE80211_STA_DISABLE_HT | 204 IEEE80211_STA_DISABLE_VHT | 205 IEEE80211_STA_DISABLE_HE; 206 goto out; 207 } 208 209 /* check 40 MHz support, if we have it */ 210 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 211 ieee80211_chandef_ht_oper(ht_oper, chandef); 212 } else { 213 /* 40 MHz (and 80 MHz) must be supported for VHT */ 214 ret = IEEE80211_STA_DISABLE_VHT; 215 /* also mark 40 MHz disabled */ 216 ret |= IEEE80211_STA_DISABLE_40MHZ; 217 goto out; 218 } 219 220 if (!vht_oper || !sband->vht_cap.vht_supported) { 221 ret = IEEE80211_STA_DISABLE_VHT; 222 goto out; 223 } 224 225 vht_chandef = *chandef; 226 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 227 (le32_to_cpu(he_oper->he_oper_params) & 228 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 229 struct ieee80211_vht_operation he_oper_vht_cap; 230 231 /* 232 * Set only first 3 bytes (other 2 aren't used in 233 * ieee80211_chandef_vht_oper() anyway) 234 */ 235 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 236 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 237 238 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 239 &he_oper_vht_cap, ht_oper, 240 &vht_chandef)) { 241 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 242 sdata_info(sdata, 243 "HE AP VHT information is invalid, disable HE\n"); 244 ret = IEEE80211_STA_DISABLE_HE; 245 goto out; 246 } 247 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 248 vht_cap_info, 249 vht_oper, ht_oper, 250 &vht_chandef)) { 251 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 252 sdata_info(sdata, 253 "AP VHT information is invalid, disable VHT\n"); 254 ret = IEEE80211_STA_DISABLE_VHT; 255 goto out; 256 } 257 258 if (!cfg80211_chandef_valid(&vht_chandef)) { 259 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 260 sdata_info(sdata, 261 "AP VHT information is invalid, disable VHT\n"); 262 ret = IEEE80211_STA_DISABLE_VHT; 263 goto out; 264 } 265 266 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 267 ret = 0; 268 goto out; 269 } 270 271 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 272 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 273 sdata_info(sdata, 274 "AP VHT information doesn't match HT, disable VHT\n"); 275 ret = IEEE80211_STA_DISABLE_VHT; 276 goto out; 277 } 278 279 *chandef = vht_chandef; 280 281 ret = 0; 282 283 out: 284 /* 285 * When tracking the current AP, don't do any further checks if the 286 * new chandef is identical to the one we're currently using for the 287 * connection. This keeps us from playing ping-pong with regulatory, 288 * without it the following can happen (for example): 289 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 290 * - AP advertises regdom US 291 * - CRDA loads regdom US with 80 MHz prohibited (old database) 292 * - the code below detects an unsupported channel, downgrades, and 293 * we disconnect from the AP in the caller 294 * - disconnect causes CRDA to reload world regdomain and the game 295 * starts anew. 296 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 297 * 298 * It seems possible that there are still scenarios with CSA or real 299 * bandwidth changes where a this could happen, but those cases are 300 * less common and wouldn't completely prevent using the AP. 301 */ 302 if (tracking && 303 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 304 return ret; 305 306 /* don't print the message below for VHT mismatch if VHT is disabled */ 307 if (ret & IEEE80211_STA_DISABLE_VHT) 308 vht_chandef = *chandef; 309 310 /* 311 * Ignore the DISABLED flag when we're already connected and only 312 * tracking the APs beacon for bandwidth changes - otherwise we 313 * might get disconnected here if we connect to an AP, update our 314 * regulatory information based on the AP's country IE and the 315 * information we have is wrong/outdated and disables the channel 316 * that we're actually using for the connection to the AP. 317 */ 318 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 319 tracking ? 0 : 320 IEEE80211_CHAN_DISABLED)) { 321 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 322 ret = IEEE80211_STA_DISABLE_HT | 323 IEEE80211_STA_DISABLE_VHT | 324 IEEE80211_STA_DISABLE_HE; 325 break; 326 } 327 328 ret |= ieee80211_chandef_downgrade(chandef); 329 } 330 331 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 332 IEEE80211_CHAN_NO_HE)) 333 ret |= IEEE80211_STA_DISABLE_HE; 334 335 if (chandef->width != vht_chandef.width && !tracking) 336 sdata_info(sdata, 337 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 338 339 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 340 return ret; 341 } 342 343 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 344 struct sta_info *sta, 345 const struct ieee80211_ht_cap *ht_cap, 346 const struct ieee80211_vht_cap *vht_cap, 347 const struct ieee80211_ht_operation *ht_oper, 348 const struct ieee80211_vht_operation *vht_oper, 349 const struct ieee80211_he_operation *he_oper, 350 const u8 *bssid, u32 *changed) 351 { 352 struct ieee80211_local *local = sdata->local; 353 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 354 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 355 struct ieee80211_supported_band *sband = 356 local->hw.wiphy->bands[chan->band]; 357 struct cfg80211_chan_def chandef; 358 u16 ht_opmode; 359 u32 flags; 360 enum ieee80211_sta_rx_bandwidth new_sta_bw; 361 u32 vht_cap_info = 0; 362 int ret; 363 364 /* if HT was/is disabled, don't track any bandwidth changes */ 365 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 366 return 0; 367 368 /* don't check VHT if we associated as non-VHT station */ 369 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 370 vht_oper = NULL; 371 372 /* don't check HE if we associated as non-HE station */ 373 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 374 !ieee80211_get_he_sta_cap(sband)) 375 he_oper = NULL; 376 377 if (WARN_ON_ONCE(!sta)) 378 return -EINVAL; 379 380 /* 381 * if bss configuration changed store the new one - 382 * this may be applicable even if channel is identical 383 */ 384 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 385 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 386 *changed |= BSS_CHANGED_HT; 387 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 388 } 389 390 if (vht_cap) 391 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 392 393 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 394 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 395 ht_oper, vht_oper, he_oper, 396 &chandef, true); 397 398 /* 399 * Downgrade the new channel if we associated with restricted 400 * capabilities. For example, if we associated as a 20 MHz STA 401 * to a 40 MHz AP (due to regulatory, capabilities or config 402 * reasons) then switching to a 40 MHz channel now won't do us 403 * any good -- we couldn't use it with the AP. 404 */ 405 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 406 chandef.width == NL80211_CHAN_WIDTH_80P80) 407 flags |= ieee80211_chandef_downgrade(&chandef); 408 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 409 chandef.width == NL80211_CHAN_WIDTH_160) 410 flags |= ieee80211_chandef_downgrade(&chandef); 411 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 412 chandef.width > NL80211_CHAN_WIDTH_20) 413 flags |= ieee80211_chandef_downgrade(&chandef); 414 415 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 416 return 0; 417 418 sdata_info(sdata, 419 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 420 "width %d (%d.%03d/%d MHz)\n", 421 ifmgd->bssid, chandef.chan->center_freq, 422 chandef.chan->freq_offset, chandef.width, 423 chandef.center_freq1, chandef.freq1_offset, 424 chandef.center_freq2); 425 426 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 427 IEEE80211_STA_DISABLE_VHT | 428 IEEE80211_STA_DISABLE_HE | 429 IEEE80211_STA_DISABLE_40MHZ | 430 IEEE80211_STA_DISABLE_80P80MHZ | 431 IEEE80211_STA_DISABLE_160MHZ)) || 432 !cfg80211_chandef_valid(&chandef)) { 433 sdata_info(sdata, 434 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 435 ifmgd->bssid); 436 return -EINVAL; 437 } 438 439 switch (chandef.width) { 440 case NL80211_CHAN_WIDTH_20_NOHT: 441 case NL80211_CHAN_WIDTH_20: 442 new_sta_bw = IEEE80211_STA_RX_BW_20; 443 break; 444 case NL80211_CHAN_WIDTH_40: 445 new_sta_bw = IEEE80211_STA_RX_BW_40; 446 break; 447 case NL80211_CHAN_WIDTH_80: 448 new_sta_bw = IEEE80211_STA_RX_BW_80; 449 break; 450 case NL80211_CHAN_WIDTH_80P80: 451 case NL80211_CHAN_WIDTH_160: 452 new_sta_bw = IEEE80211_STA_RX_BW_160; 453 break; 454 default: 455 return -EINVAL; 456 } 457 458 if (new_sta_bw > sta->cur_max_bandwidth) 459 new_sta_bw = sta->cur_max_bandwidth; 460 461 if (new_sta_bw < sta->sta.bandwidth) { 462 sta->sta.bandwidth = new_sta_bw; 463 rate_control_rate_update(local, sband, sta, 464 IEEE80211_RC_BW_CHANGED); 465 } 466 467 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 468 if (ret) { 469 sdata_info(sdata, 470 "AP %pM changed bandwidth to incompatible one - disconnect\n", 471 ifmgd->bssid); 472 return ret; 473 } 474 475 if (new_sta_bw > sta->sta.bandwidth) { 476 sta->sta.bandwidth = new_sta_bw; 477 rate_control_rate_update(local, sband, sta, 478 IEEE80211_RC_BW_CHANGED); 479 } 480 481 return 0; 482 } 483 484 /* frame sending functions */ 485 486 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 487 struct sk_buff *skb, u8 ap_ht_param, 488 struct ieee80211_supported_band *sband, 489 struct ieee80211_channel *channel, 490 enum ieee80211_smps_mode smps) 491 { 492 u8 *pos; 493 u32 flags = channel->flags; 494 u16 cap; 495 struct ieee80211_sta_ht_cap ht_cap; 496 497 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 498 499 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 500 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 501 502 /* determine capability flags */ 503 cap = ht_cap.cap; 504 505 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 506 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 507 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 508 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 509 cap &= ~IEEE80211_HT_CAP_SGI_40; 510 } 511 break; 512 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 513 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 514 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 515 cap &= ~IEEE80211_HT_CAP_SGI_40; 516 } 517 break; 518 } 519 520 /* 521 * If 40 MHz was disabled associate as though we weren't 522 * capable of 40 MHz -- some broken APs will never fall 523 * back to trying to transmit in 20 MHz. 524 */ 525 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 526 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 527 cap &= ~IEEE80211_HT_CAP_SGI_40; 528 } 529 530 /* set SM PS mode properly */ 531 cap &= ~IEEE80211_HT_CAP_SM_PS; 532 switch (smps) { 533 case IEEE80211_SMPS_AUTOMATIC: 534 case IEEE80211_SMPS_NUM_MODES: 535 WARN_ON(1); 536 fallthrough; 537 case IEEE80211_SMPS_OFF: 538 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 539 IEEE80211_HT_CAP_SM_PS_SHIFT; 540 break; 541 case IEEE80211_SMPS_STATIC: 542 cap |= WLAN_HT_CAP_SM_PS_STATIC << 543 IEEE80211_HT_CAP_SM_PS_SHIFT; 544 break; 545 case IEEE80211_SMPS_DYNAMIC: 546 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 547 IEEE80211_HT_CAP_SM_PS_SHIFT; 548 break; 549 } 550 551 /* reserve and fill IE */ 552 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 553 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 554 } 555 556 /* This function determines vht capability flags for the association 557 * and builds the IE. 558 * Note - the function may set the owner of the MU-MIMO capability 559 */ 560 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 561 struct sk_buff *skb, 562 struct ieee80211_supported_band *sband, 563 struct ieee80211_vht_cap *ap_vht_cap) 564 { 565 struct ieee80211_local *local = sdata->local; 566 u8 *pos; 567 u32 cap; 568 struct ieee80211_sta_vht_cap vht_cap; 569 u32 mask, ap_bf_sts, our_bf_sts; 570 571 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 572 573 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 574 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 575 576 /* determine capability flags */ 577 cap = vht_cap.cap; 578 579 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 580 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 581 582 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 583 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 584 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 585 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 586 } 587 588 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 589 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 590 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 591 } 592 593 /* 594 * Some APs apparently get confused if our capabilities are better 595 * than theirs, so restrict what we advertise in the assoc request. 596 */ 597 if (!(ap_vht_cap->vht_cap_info & 598 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 599 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 600 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 601 else if (!(ap_vht_cap->vht_cap_info & 602 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 603 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 604 605 /* 606 * If some other vif is using the MU-MIMO capablity we cannot associate 607 * using MU-MIMO - this will lead to contradictions in the group-id 608 * mechanism. 609 * Ownership is defined since association request, in order to avoid 610 * simultaneous associations with MU-MIMO. 611 */ 612 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 613 bool disable_mu_mimo = false; 614 struct ieee80211_sub_if_data *other; 615 616 list_for_each_entry_rcu(other, &local->interfaces, list) { 617 if (other->vif.mu_mimo_owner) { 618 disable_mu_mimo = true; 619 break; 620 } 621 } 622 if (disable_mu_mimo) 623 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 624 else 625 sdata->vif.mu_mimo_owner = true; 626 } 627 628 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 629 630 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 631 our_bf_sts = cap & mask; 632 633 if (ap_bf_sts < our_bf_sts) { 634 cap &= ~mask; 635 cap |= ap_bf_sts; 636 } 637 638 /* reserve and fill IE */ 639 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 640 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 641 } 642 643 /* This function determines HE capability flags for the association 644 * and builds the IE. 645 */ 646 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 647 struct sk_buff *skb, 648 struct ieee80211_supported_band *sband) 649 { 650 u8 *pos; 651 const struct ieee80211_sta_he_cap *he_cap = NULL; 652 struct ieee80211_chanctx_conf *chanctx_conf; 653 u8 he_cap_size; 654 bool reg_cap = false; 655 656 rcu_read_lock(); 657 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 658 if (!WARN_ON_ONCE(!chanctx_conf)) 659 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 660 &chanctx_conf->def, 661 IEEE80211_CHAN_NO_HE); 662 663 rcu_read_unlock(); 664 665 he_cap = ieee80211_get_he_sta_cap(sband); 666 if (!he_cap || !reg_cap) 667 return; 668 669 /* 670 * TODO: the 1 added is because this temporarily is under the EXTENSION 671 * IE. Get rid of it when it moves. 672 */ 673 he_cap_size = 674 2 + 1 + sizeof(he_cap->he_cap_elem) + 675 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 676 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 677 he_cap->he_cap_elem.phy_cap_info); 678 pos = skb_put(skb, he_cap_size); 679 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 680 681 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 682 } 683 684 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 685 { 686 struct ieee80211_local *local = sdata->local; 687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 688 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 689 struct sk_buff *skb; 690 struct ieee80211_mgmt *mgmt; 691 u8 *pos, qos_info, *ie_start; 692 size_t offset = 0, noffset; 693 int i, count, rates_len, supp_rates_len, shift; 694 u16 capab; 695 struct ieee80211_supported_band *sband; 696 struct ieee80211_chanctx_conf *chanctx_conf; 697 struct ieee80211_channel *chan; 698 u32 rates = 0; 699 struct element *ext_capa = NULL; 700 701 /* we know it's writable, cast away the const */ 702 if (assoc_data->ie_len) 703 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 704 assoc_data->ie, 705 assoc_data->ie_len); 706 707 sdata_assert_lock(sdata); 708 709 rcu_read_lock(); 710 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 711 if (WARN_ON(!chanctx_conf)) { 712 rcu_read_unlock(); 713 return; 714 } 715 chan = chanctx_conf->def.chan; 716 rcu_read_unlock(); 717 sband = local->hw.wiphy->bands[chan->band]; 718 shift = ieee80211_vif_get_shift(&sdata->vif); 719 720 if (assoc_data->supp_rates_len) { 721 /* 722 * Get all rates supported by the device and the AP as 723 * some APs don't like getting a superset of their rates 724 * in the association request (e.g. D-Link DAP 1353 in 725 * b-only mode)... 726 */ 727 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 728 assoc_data->supp_rates, 729 assoc_data->supp_rates_len, 730 &rates); 731 } else { 732 /* 733 * In case AP not provide any supported rates information 734 * before association, we send information element(s) with 735 * all rates that we support. 736 */ 737 rates_len = 0; 738 for (i = 0; i < sband->n_bitrates; i++) { 739 rates |= BIT(i); 740 rates_len++; 741 } 742 } 743 744 skb = alloc_skb(local->hw.extra_tx_headroom + 745 sizeof(*mgmt) + /* bit too much but doesn't matter */ 746 2 + assoc_data->ssid_len + /* SSID */ 747 4 + rates_len + /* (extended) rates */ 748 4 + /* power capability */ 749 2 + 2 * sband->n_channels + /* supported channels */ 750 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 751 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 752 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 753 sizeof(struct ieee80211_he_mcs_nss_supp) + 754 IEEE80211_HE_PPE_THRES_MAX_LEN + 755 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 756 assoc_data->ie_len + /* extra IEs */ 757 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 758 9, /* WMM */ 759 GFP_KERNEL); 760 if (!skb) 761 return; 762 763 skb_reserve(skb, local->hw.extra_tx_headroom); 764 765 capab = WLAN_CAPABILITY_ESS; 766 767 if (sband->band == NL80211_BAND_2GHZ) { 768 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 769 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 770 } 771 772 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 773 capab |= WLAN_CAPABILITY_PRIVACY; 774 775 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 776 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 777 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 778 779 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 780 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 781 782 mgmt = skb_put_zero(skb, 24); 783 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 784 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 785 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 786 787 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 788 skb_put(skb, 10); 789 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 790 IEEE80211_STYPE_REASSOC_REQ); 791 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 792 mgmt->u.reassoc_req.listen_interval = 793 cpu_to_le16(local->hw.conf.listen_interval); 794 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 795 ETH_ALEN); 796 } else { 797 skb_put(skb, 4); 798 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 799 IEEE80211_STYPE_ASSOC_REQ); 800 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 801 mgmt->u.assoc_req.listen_interval = 802 cpu_to_le16(local->hw.conf.listen_interval); 803 } 804 805 /* SSID */ 806 pos = skb_put(skb, 2 + assoc_data->ssid_len); 807 ie_start = pos; 808 *pos++ = WLAN_EID_SSID; 809 *pos++ = assoc_data->ssid_len; 810 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 811 812 /* add all rates which were marked to be used above */ 813 supp_rates_len = rates_len; 814 if (supp_rates_len > 8) 815 supp_rates_len = 8; 816 817 pos = skb_put(skb, supp_rates_len + 2); 818 *pos++ = WLAN_EID_SUPP_RATES; 819 *pos++ = supp_rates_len; 820 821 count = 0; 822 for (i = 0; i < sband->n_bitrates; i++) { 823 if (BIT(i) & rates) { 824 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 825 5 * (1 << shift)); 826 *pos++ = (u8) rate; 827 if (++count == 8) 828 break; 829 } 830 } 831 832 if (rates_len > count) { 833 pos = skb_put(skb, rates_len - count + 2); 834 *pos++ = WLAN_EID_EXT_SUPP_RATES; 835 *pos++ = rates_len - count; 836 837 for (i++; i < sband->n_bitrates; i++) { 838 if (BIT(i) & rates) { 839 int rate; 840 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 841 5 * (1 << shift)); 842 *pos++ = (u8) rate; 843 } 844 } 845 } 846 847 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 848 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 849 pos = skb_put(skb, 4); 850 *pos++ = WLAN_EID_PWR_CAPABILITY; 851 *pos++ = 2; 852 *pos++ = 0; /* min tx power */ 853 /* max tx power */ 854 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 855 } 856 857 /* 858 * Per spec, we shouldn't include the list of channels if we advertise 859 * support for extended channel switching, but we've always done that; 860 * (for now?) apply this restriction only on the (new) 6 GHz band. 861 */ 862 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 863 (sband->band != NL80211_BAND_6GHZ || 864 !ext_capa || ext_capa->datalen < 1 || 865 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 866 /* TODO: get this in reg domain format */ 867 pos = skb_put(skb, 2 * sband->n_channels + 2); 868 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 869 *pos++ = 2 * sband->n_channels; 870 for (i = 0; i < sband->n_channels; i++) { 871 *pos++ = ieee80211_frequency_to_channel( 872 sband->channels[i].center_freq); 873 *pos++ = 1; /* one channel in the subband*/ 874 } 875 } 876 877 /* Set MBSSID support for HE AP if needed */ 878 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 879 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 880 ext_capa && ext_capa->datalen >= 3) 881 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 882 883 /* if present, add any custom IEs that go before HT */ 884 if (assoc_data->ie_len) { 885 static const u8 before_ht[] = { 886 WLAN_EID_SSID, 887 WLAN_EID_SUPP_RATES, 888 WLAN_EID_EXT_SUPP_RATES, 889 WLAN_EID_PWR_CAPABILITY, 890 WLAN_EID_SUPPORTED_CHANNELS, 891 WLAN_EID_RSN, 892 WLAN_EID_QOS_CAPA, 893 WLAN_EID_RRM_ENABLED_CAPABILITIES, 894 WLAN_EID_MOBILITY_DOMAIN, 895 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 896 WLAN_EID_RIC_DATA, /* reassoc only */ 897 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 898 }; 899 static const u8 after_ric[] = { 900 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 901 WLAN_EID_HT_CAPABILITY, 902 WLAN_EID_BSS_COEX_2040, 903 /* luckily this is almost always there */ 904 WLAN_EID_EXT_CAPABILITY, 905 WLAN_EID_QOS_TRAFFIC_CAPA, 906 WLAN_EID_TIM_BCAST_REQ, 907 WLAN_EID_INTERWORKING, 908 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 909 WLAN_EID_VHT_CAPABILITY, 910 WLAN_EID_OPMODE_NOTIF, 911 }; 912 913 noffset = ieee80211_ie_split_ric(assoc_data->ie, 914 assoc_data->ie_len, 915 before_ht, 916 ARRAY_SIZE(before_ht), 917 after_ric, 918 ARRAY_SIZE(after_ric), 919 offset); 920 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 921 offset = noffset; 922 } 923 924 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 925 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 926 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 927 928 if (sband->band != NL80211_BAND_6GHZ && 929 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 930 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 931 sband, chan, sdata->smps_mode); 932 933 /* if present, add any custom IEs that go before VHT */ 934 if (assoc_data->ie_len) { 935 static const u8 before_vht[] = { 936 /* 937 * no need to list the ones split off before HT 938 * or generated here 939 */ 940 WLAN_EID_BSS_COEX_2040, 941 WLAN_EID_EXT_CAPABILITY, 942 WLAN_EID_QOS_TRAFFIC_CAPA, 943 WLAN_EID_TIM_BCAST_REQ, 944 WLAN_EID_INTERWORKING, 945 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 946 }; 947 948 /* RIC already taken above, so no need to handle here anymore */ 949 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 950 before_vht, ARRAY_SIZE(before_vht), 951 offset); 952 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 953 offset = noffset; 954 } 955 956 /* if present, add any custom IEs that go before HE */ 957 if (assoc_data->ie_len) { 958 static const u8 before_he[] = { 959 /* 960 * no need to list the ones split off before VHT 961 * or generated here 962 */ 963 WLAN_EID_OPMODE_NOTIF, 964 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 965 /* 11ai elements */ 966 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 967 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 968 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 969 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 970 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 971 /* TODO: add 11ah/11aj/11ak elements */ 972 }; 973 974 /* RIC already taken above, so no need to handle here anymore */ 975 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 976 before_he, ARRAY_SIZE(before_he), 977 offset); 978 pos = skb_put(skb, noffset - offset); 979 memcpy(pos, assoc_data->ie + offset, noffset - offset); 980 offset = noffset; 981 } 982 983 if (sband->band != NL80211_BAND_6GHZ && 984 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 985 ieee80211_add_vht_ie(sdata, skb, sband, 986 &assoc_data->ap_vht_cap); 987 988 /* 989 * If AP doesn't support HT, mark HE as disabled. 990 * If on the 5GHz band, make sure it supports VHT. 991 */ 992 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 993 (sband->band == NL80211_BAND_5GHZ && 994 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 995 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 996 997 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 998 ieee80211_add_he_ie(sdata, skb, sband); 999 1000 /* if present, add any custom non-vendor IEs that go after HE */ 1001 if (assoc_data->ie_len) { 1002 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1003 assoc_data->ie_len, 1004 offset); 1005 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1006 offset = noffset; 1007 } 1008 1009 if (assoc_data->wmm) { 1010 if (assoc_data->uapsd) { 1011 qos_info = ifmgd->uapsd_queues; 1012 qos_info |= (ifmgd->uapsd_max_sp_len << 1013 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1014 } else { 1015 qos_info = 0; 1016 } 1017 1018 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1019 } 1020 1021 /* add any remaining custom (i.e. vendor specific here) IEs */ 1022 if (assoc_data->ie_len) { 1023 noffset = assoc_data->ie_len; 1024 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1025 } 1026 1027 if (assoc_data->fils_kek_len && 1028 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 1029 dev_kfree_skb(skb); 1030 return; 1031 } 1032 1033 pos = skb_tail_pointer(skb); 1034 kfree(ifmgd->assoc_req_ies); 1035 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1036 ifmgd->assoc_req_ies_len = pos - ie_start; 1037 1038 drv_mgd_prepare_tx(local, sdata, 0); 1039 1040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1041 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1042 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1043 IEEE80211_TX_INTFL_MLME_CONN_TX; 1044 ieee80211_tx_skb(sdata, skb); 1045 } 1046 1047 void ieee80211_send_pspoll(struct ieee80211_local *local, 1048 struct ieee80211_sub_if_data *sdata) 1049 { 1050 struct ieee80211_pspoll *pspoll; 1051 struct sk_buff *skb; 1052 1053 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1054 if (!skb) 1055 return; 1056 1057 pspoll = (struct ieee80211_pspoll *) skb->data; 1058 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1059 1060 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1061 ieee80211_tx_skb(sdata, skb); 1062 } 1063 1064 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1065 struct ieee80211_sub_if_data *sdata, 1066 bool powersave) 1067 { 1068 struct sk_buff *skb; 1069 struct ieee80211_hdr_3addr *nullfunc; 1070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1071 1072 /* Don't send NDPs when STA is connected HE */ 1073 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1074 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1075 return; 1076 1077 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1078 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1079 if (!skb) 1080 return; 1081 1082 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1083 if (powersave) 1084 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1085 1086 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1087 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1088 1089 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1090 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1091 1092 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1093 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1094 1095 ieee80211_tx_skb(sdata, skb); 1096 } 1097 1098 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1099 struct ieee80211_sub_if_data *sdata) 1100 { 1101 struct sk_buff *skb; 1102 struct ieee80211_hdr *nullfunc; 1103 __le16 fc; 1104 1105 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1106 return; 1107 1108 /* Don't send NDPs when connected HE */ 1109 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1110 return; 1111 1112 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1113 if (!skb) 1114 return; 1115 1116 skb_reserve(skb, local->hw.extra_tx_headroom); 1117 1118 nullfunc = skb_put_zero(skb, 30); 1119 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1120 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1121 nullfunc->frame_control = fc; 1122 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1123 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1124 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1125 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1126 1127 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1128 ieee80211_tx_skb(sdata, skb); 1129 } 1130 1131 /* spectrum management related things */ 1132 static void ieee80211_chswitch_work(struct work_struct *work) 1133 { 1134 struct ieee80211_sub_if_data *sdata = 1135 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1136 struct ieee80211_local *local = sdata->local; 1137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1138 int ret; 1139 1140 if (!ieee80211_sdata_running(sdata)) 1141 return; 1142 1143 sdata_lock(sdata); 1144 mutex_lock(&local->mtx); 1145 mutex_lock(&local->chanctx_mtx); 1146 1147 if (!ifmgd->associated) 1148 goto out; 1149 1150 if (!sdata->vif.csa_active) 1151 goto out; 1152 1153 /* 1154 * using reservation isn't immediate as it may be deferred until later 1155 * with multi-vif. once reservation is complete it will re-schedule the 1156 * work with no reserved_chanctx so verify chandef to check if it 1157 * completed successfully 1158 */ 1159 1160 if (sdata->reserved_chanctx) { 1161 struct ieee80211_supported_band *sband = NULL; 1162 struct sta_info *mgd_sta = NULL; 1163 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1164 1165 /* 1166 * with multi-vif csa driver may call ieee80211_csa_finish() 1167 * many times while waiting for other interfaces to use their 1168 * reservations 1169 */ 1170 if (sdata->reserved_ready) 1171 goto out; 1172 1173 if (sdata->vif.bss_conf.chandef.width != 1174 sdata->csa_chandef.width) { 1175 /* 1176 * For managed interface, we need to also update the AP 1177 * station bandwidth and align the rate scale algorithm 1178 * on the bandwidth change. Here we only consider the 1179 * bandwidth of the new channel definition (as channel 1180 * switch flow does not have the full HT/VHT/HE 1181 * information), assuming that if additional changes are 1182 * required they would be done as part of the processing 1183 * of the next beacon from the AP. 1184 */ 1185 switch (sdata->csa_chandef.width) { 1186 case NL80211_CHAN_WIDTH_20_NOHT: 1187 case NL80211_CHAN_WIDTH_20: 1188 default: 1189 bw = IEEE80211_STA_RX_BW_20; 1190 break; 1191 case NL80211_CHAN_WIDTH_40: 1192 bw = IEEE80211_STA_RX_BW_40; 1193 break; 1194 case NL80211_CHAN_WIDTH_80: 1195 bw = IEEE80211_STA_RX_BW_80; 1196 break; 1197 case NL80211_CHAN_WIDTH_80P80: 1198 case NL80211_CHAN_WIDTH_160: 1199 bw = IEEE80211_STA_RX_BW_160; 1200 break; 1201 } 1202 1203 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1204 sband = 1205 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1206 } 1207 1208 if (sdata->vif.bss_conf.chandef.width > 1209 sdata->csa_chandef.width) { 1210 mgd_sta->sta.bandwidth = bw; 1211 rate_control_rate_update(local, sband, mgd_sta, 1212 IEEE80211_RC_BW_CHANGED); 1213 } 1214 1215 ret = ieee80211_vif_use_reserved_context(sdata); 1216 if (ret) { 1217 sdata_info(sdata, 1218 "failed to use reserved channel context, disconnecting (err=%d)\n", 1219 ret); 1220 ieee80211_queue_work(&sdata->local->hw, 1221 &ifmgd->csa_connection_drop_work); 1222 goto out; 1223 } 1224 1225 if (sdata->vif.bss_conf.chandef.width < 1226 sdata->csa_chandef.width) { 1227 mgd_sta->sta.bandwidth = bw; 1228 rate_control_rate_update(local, sband, mgd_sta, 1229 IEEE80211_RC_BW_CHANGED); 1230 } 1231 1232 goto out; 1233 } 1234 1235 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1236 &sdata->csa_chandef)) { 1237 sdata_info(sdata, 1238 "failed to finalize channel switch, disconnecting\n"); 1239 ieee80211_queue_work(&sdata->local->hw, 1240 &ifmgd->csa_connection_drop_work); 1241 goto out; 1242 } 1243 1244 ifmgd->csa_waiting_bcn = true; 1245 1246 ieee80211_sta_reset_beacon_monitor(sdata); 1247 ieee80211_sta_reset_conn_monitor(sdata); 1248 1249 out: 1250 mutex_unlock(&local->chanctx_mtx); 1251 mutex_unlock(&local->mtx); 1252 sdata_unlock(sdata); 1253 } 1254 1255 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1256 { 1257 struct ieee80211_local *local = sdata->local; 1258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1259 int ret; 1260 1261 sdata_assert_lock(sdata); 1262 1263 WARN_ON(!sdata->vif.csa_active); 1264 1265 if (sdata->csa_block_tx) { 1266 ieee80211_wake_vif_queues(local, sdata, 1267 IEEE80211_QUEUE_STOP_REASON_CSA); 1268 sdata->csa_block_tx = false; 1269 } 1270 1271 sdata->vif.csa_active = false; 1272 ifmgd->csa_waiting_bcn = false; 1273 1274 ret = drv_post_channel_switch(sdata); 1275 if (ret) { 1276 sdata_info(sdata, 1277 "driver post channel switch failed, disconnecting\n"); 1278 ieee80211_queue_work(&local->hw, 1279 &ifmgd->csa_connection_drop_work); 1280 return; 1281 } 1282 1283 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1284 } 1285 1286 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1287 { 1288 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1290 1291 trace_api_chswitch_done(sdata, success); 1292 if (!success) { 1293 sdata_info(sdata, 1294 "driver channel switch failed, disconnecting\n"); 1295 ieee80211_queue_work(&sdata->local->hw, 1296 &ifmgd->csa_connection_drop_work); 1297 } else { 1298 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1299 } 1300 } 1301 EXPORT_SYMBOL(ieee80211_chswitch_done); 1302 1303 static void ieee80211_chswitch_timer(struct timer_list *t) 1304 { 1305 struct ieee80211_sub_if_data *sdata = 1306 from_timer(sdata, t, u.mgd.chswitch_timer); 1307 1308 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1309 } 1310 1311 static void 1312 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1313 { 1314 struct ieee80211_local *local = sdata->local; 1315 1316 if (!local->ops->abort_channel_switch) 1317 return; 1318 1319 mutex_lock(&local->mtx); 1320 1321 mutex_lock(&local->chanctx_mtx); 1322 ieee80211_vif_unreserve_chanctx(sdata); 1323 mutex_unlock(&local->chanctx_mtx); 1324 1325 if (sdata->csa_block_tx) 1326 ieee80211_wake_vif_queues(local, sdata, 1327 IEEE80211_QUEUE_STOP_REASON_CSA); 1328 1329 sdata->csa_block_tx = false; 1330 sdata->vif.csa_active = false; 1331 1332 mutex_unlock(&local->mtx); 1333 1334 drv_abort_channel_switch(sdata); 1335 } 1336 1337 static void 1338 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1339 u64 timestamp, u32 device_timestamp, 1340 struct ieee802_11_elems *elems, 1341 bool beacon) 1342 { 1343 struct ieee80211_local *local = sdata->local; 1344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1345 struct cfg80211_bss *cbss = ifmgd->associated; 1346 struct ieee80211_chanctx_conf *conf; 1347 struct ieee80211_chanctx *chanctx; 1348 enum nl80211_band current_band; 1349 struct ieee80211_csa_ie csa_ie; 1350 struct ieee80211_channel_switch ch_switch; 1351 struct ieee80211_bss *bss; 1352 int res; 1353 1354 sdata_assert_lock(sdata); 1355 1356 if (!cbss) 1357 return; 1358 1359 if (local->scanning) 1360 return; 1361 1362 current_band = cbss->channel->band; 1363 bss = (void *)cbss->priv; 1364 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1365 bss->vht_cap_info, 1366 ifmgd->flags, 1367 ifmgd->associated->bssid, &csa_ie); 1368 1369 if (!res) { 1370 ch_switch.timestamp = timestamp; 1371 ch_switch.device_timestamp = device_timestamp; 1372 ch_switch.block_tx = csa_ie.mode; 1373 ch_switch.chandef = csa_ie.chandef; 1374 ch_switch.count = csa_ie.count; 1375 ch_switch.delay = csa_ie.max_switch_time; 1376 } 1377 1378 if (res < 0) { 1379 ieee80211_queue_work(&local->hw, 1380 &ifmgd->csa_connection_drop_work); 1381 return; 1382 } 1383 1384 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1385 if (res) 1386 ieee80211_sta_abort_chanswitch(sdata); 1387 else 1388 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1389 return; 1390 } else if (sdata->vif.csa_active || res) { 1391 /* disregard subsequent announcements if already processing */ 1392 return; 1393 } 1394 1395 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1396 IEEE80211_CHAN_DISABLED)) { 1397 sdata_info(sdata, 1398 "AP %pM switches to unsupported channel " 1399 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1400 "disconnecting\n", 1401 ifmgd->associated->bssid, 1402 csa_ie.chandef.chan->center_freq, 1403 csa_ie.chandef.chan->freq_offset, 1404 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1405 csa_ie.chandef.freq1_offset, 1406 csa_ie.chandef.center_freq2); 1407 ieee80211_queue_work(&local->hw, 1408 &ifmgd->csa_connection_drop_work); 1409 return; 1410 } 1411 1412 if (cfg80211_chandef_identical(&csa_ie.chandef, 1413 &sdata->vif.bss_conf.chandef) && 1414 (!csa_ie.mode || !beacon)) { 1415 if (ifmgd->csa_ignored_same_chan) 1416 return; 1417 sdata_info(sdata, 1418 "AP %pM tries to chanswitch to same channel, ignore\n", 1419 ifmgd->associated->bssid); 1420 ifmgd->csa_ignored_same_chan = true; 1421 return; 1422 } 1423 1424 /* 1425 * Drop all TDLS peers - either we disconnect or move to a different 1426 * channel from this point on. There's no telling what our peer will do. 1427 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1428 * have an incompatible wider chandef. 1429 */ 1430 ieee80211_teardown_tdls_peers(sdata); 1431 1432 mutex_lock(&local->mtx); 1433 mutex_lock(&local->chanctx_mtx); 1434 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1435 lockdep_is_held(&local->chanctx_mtx)); 1436 if (!conf) { 1437 sdata_info(sdata, 1438 "no channel context assigned to vif?, disconnecting\n"); 1439 goto drop_connection; 1440 } 1441 1442 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1443 1444 if (local->use_chanctx && 1445 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1446 sdata_info(sdata, 1447 "driver doesn't support chan-switch with channel contexts\n"); 1448 goto drop_connection; 1449 } 1450 1451 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1452 sdata_info(sdata, 1453 "preparing for channel switch failed, disconnecting\n"); 1454 goto drop_connection; 1455 } 1456 1457 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1458 chanctx->mode, false); 1459 if (res) { 1460 sdata_info(sdata, 1461 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1462 res); 1463 goto drop_connection; 1464 } 1465 mutex_unlock(&local->chanctx_mtx); 1466 1467 sdata->vif.csa_active = true; 1468 sdata->csa_chandef = csa_ie.chandef; 1469 sdata->csa_block_tx = csa_ie.mode; 1470 ifmgd->csa_ignored_same_chan = false; 1471 1472 if (sdata->csa_block_tx) 1473 ieee80211_stop_vif_queues(local, sdata, 1474 IEEE80211_QUEUE_STOP_REASON_CSA); 1475 mutex_unlock(&local->mtx); 1476 1477 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1478 csa_ie.count); 1479 1480 if (local->ops->channel_switch) { 1481 /* use driver's channel switch callback */ 1482 drv_channel_switch(local, sdata, &ch_switch); 1483 return; 1484 } 1485 1486 /* channel switch handled in software */ 1487 if (csa_ie.count <= 1) 1488 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1489 else 1490 mod_timer(&ifmgd->chswitch_timer, 1491 TU_TO_EXP_TIME((csa_ie.count - 1) * 1492 cbss->beacon_interval)); 1493 return; 1494 drop_connection: 1495 /* 1496 * This is just so that the disconnect flow will know that 1497 * we were trying to switch channel and failed. In case the 1498 * mode is 1 (we are not allowed to Tx), we will know not to 1499 * send a deauthentication frame. Those two fields will be 1500 * reset when the disconnection worker runs. 1501 */ 1502 sdata->vif.csa_active = true; 1503 sdata->csa_block_tx = csa_ie.mode; 1504 1505 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1506 mutex_unlock(&local->chanctx_mtx); 1507 mutex_unlock(&local->mtx); 1508 } 1509 1510 static bool 1511 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1512 struct ieee80211_channel *channel, 1513 const u8 *country_ie, u8 country_ie_len, 1514 const u8 *pwr_constr_elem, 1515 int *chan_pwr, int *pwr_reduction) 1516 { 1517 struct ieee80211_country_ie_triplet *triplet; 1518 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1519 int i, chan_increment; 1520 bool have_chan_pwr = false; 1521 1522 /* Invalid IE */ 1523 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1524 return false; 1525 1526 triplet = (void *)(country_ie + 3); 1527 country_ie_len -= 3; 1528 1529 switch (channel->band) { 1530 default: 1531 WARN_ON_ONCE(1); 1532 fallthrough; 1533 case NL80211_BAND_2GHZ: 1534 case NL80211_BAND_60GHZ: 1535 chan_increment = 1; 1536 break; 1537 case NL80211_BAND_5GHZ: 1538 case NL80211_BAND_6GHZ: 1539 chan_increment = 4; 1540 break; 1541 } 1542 1543 /* find channel */ 1544 while (country_ie_len >= 3) { 1545 u8 first_channel = triplet->chans.first_channel; 1546 1547 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1548 goto next; 1549 1550 for (i = 0; i < triplet->chans.num_channels; i++) { 1551 if (first_channel + i * chan_increment == chan) { 1552 have_chan_pwr = true; 1553 *chan_pwr = triplet->chans.max_power; 1554 break; 1555 } 1556 } 1557 if (have_chan_pwr) 1558 break; 1559 1560 next: 1561 triplet++; 1562 country_ie_len -= 3; 1563 } 1564 1565 if (have_chan_pwr && pwr_constr_elem) 1566 *pwr_reduction = *pwr_constr_elem; 1567 else 1568 *pwr_reduction = 0; 1569 1570 return have_chan_pwr; 1571 } 1572 1573 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1574 struct ieee80211_channel *channel, 1575 const u8 *cisco_dtpc_ie, 1576 int *pwr_level) 1577 { 1578 /* From practical testing, the first data byte of the DTPC element 1579 * seems to contain the requested dBm level, and the CLI on Cisco 1580 * APs clearly state the range is -127 to 127 dBm, which indicates 1581 * a signed byte, although it seemingly never actually goes negative. 1582 * The other byte seems to always be zero. 1583 */ 1584 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1585 } 1586 1587 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1588 struct ieee80211_channel *channel, 1589 struct ieee80211_mgmt *mgmt, 1590 const u8 *country_ie, u8 country_ie_len, 1591 const u8 *pwr_constr_ie, 1592 const u8 *cisco_dtpc_ie) 1593 { 1594 bool has_80211h_pwr = false, has_cisco_pwr = false; 1595 int chan_pwr = 0, pwr_reduction_80211h = 0; 1596 int pwr_level_cisco, pwr_level_80211h; 1597 int new_ap_level; 1598 __le16 capab = mgmt->u.probe_resp.capab_info; 1599 1600 if (country_ie && 1601 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1602 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1603 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1604 sdata, channel, country_ie, country_ie_len, 1605 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1606 pwr_level_80211h = 1607 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1608 } 1609 1610 if (cisco_dtpc_ie) { 1611 ieee80211_find_cisco_dtpc( 1612 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1613 has_cisco_pwr = true; 1614 } 1615 1616 if (!has_80211h_pwr && !has_cisco_pwr) 1617 return 0; 1618 1619 /* If we have both 802.11h and Cisco DTPC, apply both limits 1620 * by picking the smallest of the two power levels advertised. 1621 */ 1622 if (has_80211h_pwr && 1623 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1624 new_ap_level = pwr_level_80211h; 1625 1626 if (sdata->ap_power_level == new_ap_level) 1627 return 0; 1628 1629 sdata_dbg(sdata, 1630 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1631 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1632 sdata->u.mgd.bssid); 1633 } else { /* has_cisco_pwr is always true here. */ 1634 new_ap_level = pwr_level_cisco; 1635 1636 if (sdata->ap_power_level == new_ap_level) 1637 return 0; 1638 1639 sdata_dbg(sdata, 1640 "Limiting TX power to %d dBm as advertised by %pM\n", 1641 pwr_level_cisco, sdata->u.mgd.bssid); 1642 } 1643 1644 sdata->ap_power_level = new_ap_level; 1645 if (__ieee80211_recalc_txpower(sdata)) 1646 return BSS_CHANGED_TXPOWER; 1647 return 0; 1648 } 1649 1650 /* powersave */ 1651 static void ieee80211_enable_ps(struct ieee80211_local *local, 1652 struct ieee80211_sub_if_data *sdata) 1653 { 1654 struct ieee80211_conf *conf = &local->hw.conf; 1655 1656 /* 1657 * If we are scanning right now then the parameters will 1658 * take effect when scan finishes. 1659 */ 1660 if (local->scanning) 1661 return; 1662 1663 if (conf->dynamic_ps_timeout > 0 && 1664 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1665 mod_timer(&local->dynamic_ps_timer, jiffies + 1666 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1667 } else { 1668 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1669 ieee80211_send_nullfunc(local, sdata, true); 1670 1671 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1672 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1673 return; 1674 1675 conf->flags |= IEEE80211_CONF_PS; 1676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1677 } 1678 } 1679 1680 static void ieee80211_change_ps(struct ieee80211_local *local) 1681 { 1682 struct ieee80211_conf *conf = &local->hw.conf; 1683 1684 if (local->ps_sdata) { 1685 ieee80211_enable_ps(local, local->ps_sdata); 1686 } else if (conf->flags & IEEE80211_CONF_PS) { 1687 conf->flags &= ~IEEE80211_CONF_PS; 1688 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1689 del_timer_sync(&local->dynamic_ps_timer); 1690 cancel_work_sync(&local->dynamic_ps_enable_work); 1691 } 1692 } 1693 1694 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1695 { 1696 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1697 struct sta_info *sta = NULL; 1698 bool authorized = false; 1699 1700 if (!mgd->powersave) 1701 return false; 1702 1703 if (mgd->broken_ap) 1704 return false; 1705 1706 if (!mgd->associated) 1707 return false; 1708 1709 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1710 return false; 1711 1712 if (!mgd->have_beacon) 1713 return false; 1714 1715 rcu_read_lock(); 1716 sta = sta_info_get(sdata, mgd->bssid); 1717 if (sta) 1718 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1719 rcu_read_unlock(); 1720 1721 return authorized; 1722 } 1723 1724 /* need to hold RTNL or interface lock */ 1725 void ieee80211_recalc_ps(struct ieee80211_local *local) 1726 { 1727 struct ieee80211_sub_if_data *sdata, *found = NULL; 1728 int count = 0; 1729 int timeout; 1730 1731 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1732 local->ps_sdata = NULL; 1733 return; 1734 } 1735 1736 list_for_each_entry(sdata, &local->interfaces, list) { 1737 if (!ieee80211_sdata_running(sdata)) 1738 continue; 1739 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1740 /* If an AP vif is found, then disable PS 1741 * by setting the count to zero thereby setting 1742 * ps_sdata to NULL. 1743 */ 1744 count = 0; 1745 break; 1746 } 1747 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1748 continue; 1749 found = sdata; 1750 count++; 1751 } 1752 1753 if (count == 1 && ieee80211_powersave_allowed(found)) { 1754 u8 dtimper = found->u.mgd.dtim_period; 1755 1756 timeout = local->dynamic_ps_forced_timeout; 1757 if (timeout < 0) 1758 timeout = 100; 1759 local->hw.conf.dynamic_ps_timeout = timeout; 1760 1761 /* If the TIM IE is invalid, pretend the value is 1 */ 1762 if (!dtimper) 1763 dtimper = 1; 1764 1765 local->hw.conf.ps_dtim_period = dtimper; 1766 local->ps_sdata = found; 1767 } else { 1768 local->ps_sdata = NULL; 1769 } 1770 1771 ieee80211_change_ps(local); 1772 } 1773 1774 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1775 { 1776 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1777 1778 if (sdata->vif.bss_conf.ps != ps_allowed) { 1779 sdata->vif.bss_conf.ps = ps_allowed; 1780 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1781 } 1782 } 1783 1784 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1785 { 1786 struct ieee80211_local *local = 1787 container_of(work, struct ieee80211_local, 1788 dynamic_ps_disable_work); 1789 1790 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1791 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1792 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1793 } 1794 1795 ieee80211_wake_queues_by_reason(&local->hw, 1796 IEEE80211_MAX_QUEUE_MAP, 1797 IEEE80211_QUEUE_STOP_REASON_PS, 1798 false); 1799 } 1800 1801 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1802 { 1803 struct ieee80211_local *local = 1804 container_of(work, struct ieee80211_local, 1805 dynamic_ps_enable_work); 1806 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1807 struct ieee80211_if_managed *ifmgd; 1808 unsigned long flags; 1809 int q; 1810 1811 /* can only happen when PS was just disabled anyway */ 1812 if (!sdata) 1813 return; 1814 1815 ifmgd = &sdata->u.mgd; 1816 1817 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1818 return; 1819 1820 if (local->hw.conf.dynamic_ps_timeout > 0) { 1821 /* don't enter PS if TX frames are pending */ 1822 if (drv_tx_frames_pending(local)) { 1823 mod_timer(&local->dynamic_ps_timer, jiffies + 1824 msecs_to_jiffies( 1825 local->hw.conf.dynamic_ps_timeout)); 1826 return; 1827 } 1828 1829 /* 1830 * transmission can be stopped by others which leads to 1831 * dynamic_ps_timer expiry. Postpone the ps timer if it 1832 * is not the actual idle state. 1833 */ 1834 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1835 for (q = 0; q < local->hw.queues; q++) { 1836 if (local->queue_stop_reasons[q]) { 1837 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1838 flags); 1839 mod_timer(&local->dynamic_ps_timer, jiffies + 1840 msecs_to_jiffies( 1841 local->hw.conf.dynamic_ps_timeout)); 1842 return; 1843 } 1844 } 1845 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1846 } 1847 1848 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1849 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1850 if (drv_tx_frames_pending(local)) { 1851 mod_timer(&local->dynamic_ps_timer, jiffies + 1852 msecs_to_jiffies( 1853 local->hw.conf.dynamic_ps_timeout)); 1854 } else { 1855 ieee80211_send_nullfunc(local, sdata, true); 1856 /* Flush to get the tx status of nullfunc frame */ 1857 ieee80211_flush_queues(local, sdata, false); 1858 } 1859 } 1860 1861 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1862 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1863 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1864 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1865 local->hw.conf.flags |= IEEE80211_CONF_PS; 1866 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1867 } 1868 } 1869 1870 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1871 { 1872 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1873 1874 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1875 } 1876 1877 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1878 { 1879 struct delayed_work *delayed_work = to_delayed_work(work); 1880 struct ieee80211_sub_if_data *sdata = 1881 container_of(delayed_work, struct ieee80211_sub_if_data, 1882 dfs_cac_timer_work); 1883 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1884 1885 mutex_lock(&sdata->local->mtx); 1886 if (sdata->wdev.cac_started) { 1887 ieee80211_vif_release_channel(sdata); 1888 cfg80211_cac_event(sdata->dev, &chandef, 1889 NL80211_RADAR_CAC_FINISHED, 1890 GFP_KERNEL); 1891 } 1892 mutex_unlock(&sdata->local->mtx); 1893 } 1894 1895 static bool 1896 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1897 { 1898 struct ieee80211_local *local = sdata->local; 1899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1900 bool ret = false; 1901 int ac; 1902 1903 if (local->hw.queues < IEEE80211_NUM_ACS) 1904 return false; 1905 1906 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1907 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1908 int non_acm_ac; 1909 unsigned long now = jiffies; 1910 1911 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1912 tx_tspec->admitted_time && 1913 time_after(now, tx_tspec->time_slice_start + HZ)) { 1914 tx_tspec->consumed_tx_time = 0; 1915 tx_tspec->time_slice_start = now; 1916 1917 if (tx_tspec->downgraded) 1918 tx_tspec->action = 1919 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1920 } 1921 1922 switch (tx_tspec->action) { 1923 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1924 /* take the original parameters */ 1925 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1926 sdata_err(sdata, 1927 "failed to set TX queue parameters for queue %d\n", 1928 ac); 1929 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1930 tx_tspec->downgraded = false; 1931 ret = true; 1932 break; 1933 case TX_TSPEC_ACTION_DOWNGRADE: 1934 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1935 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1936 ret = true; 1937 break; 1938 } 1939 /* downgrade next lower non-ACM AC */ 1940 for (non_acm_ac = ac + 1; 1941 non_acm_ac < IEEE80211_NUM_ACS; 1942 non_acm_ac++) 1943 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1944 break; 1945 /* Usually the loop will result in using BK even if it 1946 * requires admission control, but such a configuration 1947 * makes no sense and we have to transmit somehow - the 1948 * AC selection does the same thing. 1949 * If we started out trying to downgrade from BK, then 1950 * the extra condition here might be needed. 1951 */ 1952 if (non_acm_ac >= IEEE80211_NUM_ACS) 1953 non_acm_ac = IEEE80211_AC_BK; 1954 if (drv_conf_tx(local, sdata, ac, 1955 &sdata->tx_conf[non_acm_ac])) 1956 sdata_err(sdata, 1957 "failed to set TX queue parameters for queue %d\n", 1958 ac); 1959 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1960 ret = true; 1961 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1962 tx_tspec->time_slice_start + HZ - now + 1); 1963 break; 1964 case TX_TSPEC_ACTION_NONE: 1965 /* nothing now */ 1966 break; 1967 } 1968 } 1969 1970 return ret; 1971 } 1972 1973 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1974 { 1975 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1976 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1977 } 1978 1979 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1980 { 1981 struct ieee80211_sub_if_data *sdata; 1982 1983 sdata = container_of(work, struct ieee80211_sub_if_data, 1984 u.mgd.tx_tspec_wk.work); 1985 ieee80211_sta_handle_tspec_ac_params(sdata); 1986 } 1987 1988 /* MLME */ 1989 static bool 1990 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1991 struct ieee80211_sub_if_data *sdata, 1992 const u8 *wmm_param, size_t wmm_param_len, 1993 const struct ieee80211_mu_edca_param_set *mu_edca) 1994 { 1995 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1997 size_t left; 1998 int count, mu_edca_count, ac; 1999 const u8 *pos; 2000 u8 uapsd_queues = 0; 2001 2002 if (!local->ops->conf_tx) 2003 return false; 2004 2005 if (local->hw.queues < IEEE80211_NUM_ACS) 2006 return false; 2007 2008 if (!wmm_param) 2009 return false; 2010 2011 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2012 return false; 2013 2014 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2015 uapsd_queues = ifmgd->uapsd_queues; 2016 2017 count = wmm_param[6] & 0x0f; 2018 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2019 * if mu_edca was preset before and now it disappeared tell 2020 * the driver about it. 2021 */ 2022 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2023 if (count == ifmgd->wmm_last_param_set && 2024 mu_edca_count == ifmgd->mu_edca_last_param_set) 2025 return false; 2026 ifmgd->wmm_last_param_set = count; 2027 ifmgd->mu_edca_last_param_set = mu_edca_count; 2028 2029 pos = wmm_param + 8; 2030 left = wmm_param_len - 8; 2031 2032 memset(¶ms, 0, sizeof(params)); 2033 2034 sdata->wmm_acm = 0; 2035 for (; left >= 4; left -= 4, pos += 4) { 2036 int aci = (pos[0] >> 5) & 0x03; 2037 int acm = (pos[0] >> 4) & 0x01; 2038 bool uapsd = false; 2039 2040 switch (aci) { 2041 case 1: /* AC_BK */ 2042 ac = IEEE80211_AC_BK; 2043 if (acm) 2044 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2045 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2046 uapsd = true; 2047 params[ac].mu_edca = !!mu_edca; 2048 if (mu_edca) 2049 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2050 break; 2051 case 2: /* AC_VI */ 2052 ac = IEEE80211_AC_VI; 2053 if (acm) 2054 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2055 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2056 uapsd = true; 2057 params[ac].mu_edca = !!mu_edca; 2058 if (mu_edca) 2059 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2060 break; 2061 case 3: /* AC_VO */ 2062 ac = IEEE80211_AC_VO; 2063 if (acm) 2064 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2065 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2066 uapsd = true; 2067 params[ac].mu_edca = !!mu_edca; 2068 if (mu_edca) 2069 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2070 break; 2071 case 0: /* AC_BE */ 2072 default: 2073 ac = IEEE80211_AC_BE; 2074 if (acm) 2075 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2076 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2077 uapsd = true; 2078 params[ac].mu_edca = !!mu_edca; 2079 if (mu_edca) 2080 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2081 break; 2082 } 2083 2084 params[ac].aifs = pos[0] & 0x0f; 2085 2086 if (params[ac].aifs < 2) { 2087 sdata_info(sdata, 2088 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2089 params[ac].aifs, aci); 2090 params[ac].aifs = 2; 2091 } 2092 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2093 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2094 params[ac].txop = get_unaligned_le16(pos + 2); 2095 params[ac].acm = acm; 2096 params[ac].uapsd = uapsd; 2097 2098 if (params[ac].cw_min == 0 || 2099 params[ac].cw_min > params[ac].cw_max) { 2100 sdata_info(sdata, 2101 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2102 params[ac].cw_min, params[ac].cw_max, aci); 2103 return false; 2104 } 2105 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2106 } 2107 2108 /* WMM specification requires all 4 ACIs. */ 2109 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2110 if (params[ac].cw_min == 0) { 2111 sdata_info(sdata, 2112 "AP has invalid WMM params (missing AC %d), using defaults\n", 2113 ac); 2114 return false; 2115 } 2116 } 2117 2118 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2119 mlme_dbg(sdata, 2120 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2121 ac, params[ac].acm, 2122 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2123 params[ac].txop, params[ac].uapsd, 2124 ifmgd->tx_tspec[ac].downgraded); 2125 sdata->tx_conf[ac] = params[ac]; 2126 if (!ifmgd->tx_tspec[ac].downgraded && 2127 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2128 sdata_err(sdata, 2129 "failed to set TX queue parameters for AC %d\n", 2130 ac); 2131 } 2132 2133 /* enable WMM or activate new settings */ 2134 sdata->vif.bss_conf.qos = true; 2135 return true; 2136 } 2137 2138 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2139 { 2140 lockdep_assert_held(&sdata->local->mtx); 2141 2142 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2143 ieee80211_run_deferred_scan(sdata->local); 2144 } 2145 2146 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2147 { 2148 mutex_lock(&sdata->local->mtx); 2149 __ieee80211_stop_poll(sdata); 2150 mutex_unlock(&sdata->local->mtx); 2151 } 2152 2153 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2154 u16 capab, bool erp_valid, u8 erp) 2155 { 2156 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2157 struct ieee80211_supported_band *sband; 2158 u32 changed = 0; 2159 bool use_protection; 2160 bool use_short_preamble; 2161 bool use_short_slot; 2162 2163 sband = ieee80211_get_sband(sdata); 2164 if (!sband) 2165 return changed; 2166 2167 if (erp_valid) { 2168 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2169 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2170 } else { 2171 use_protection = false; 2172 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2173 } 2174 2175 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2176 if (sband->band == NL80211_BAND_5GHZ || 2177 sband->band == NL80211_BAND_6GHZ) 2178 use_short_slot = true; 2179 2180 if (use_protection != bss_conf->use_cts_prot) { 2181 bss_conf->use_cts_prot = use_protection; 2182 changed |= BSS_CHANGED_ERP_CTS_PROT; 2183 } 2184 2185 if (use_short_preamble != bss_conf->use_short_preamble) { 2186 bss_conf->use_short_preamble = use_short_preamble; 2187 changed |= BSS_CHANGED_ERP_PREAMBLE; 2188 } 2189 2190 if (use_short_slot != bss_conf->use_short_slot) { 2191 bss_conf->use_short_slot = use_short_slot; 2192 changed |= BSS_CHANGED_ERP_SLOT; 2193 } 2194 2195 return changed; 2196 } 2197 2198 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2199 struct cfg80211_bss *cbss, 2200 u32 bss_info_changed) 2201 { 2202 struct ieee80211_bss *bss = (void *)cbss->priv; 2203 struct ieee80211_local *local = sdata->local; 2204 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2205 2206 bss_info_changed |= BSS_CHANGED_ASSOC; 2207 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2208 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2209 2210 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2211 beacon_loss_count * bss_conf->beacon_int)); 2212 2213 sdata->u.mgd.associated = cbss; 2214 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2215 2216 ieee80211_check_rate_mask(sdata); 2217 2218 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2219 2220 if (sdata->vif.p2p || 2221 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2222 const struct cfg80211_bss_ies *ies; 2223 2224 rcu_read_lock(); 2225 ies = rcu_dereference(cbss->ies); 2226 if (ies) { 2227 int ret; 2228 2229 ret = cfg80211_get_p2p_attr( 2230 ies->data, ies->len, 2231 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2232 (u8 *) &bss_conf->p2p_noa_attr, 2233 sizeof(bss_conf->p2p_noa_attr)); 2234 if (ret >= 2) { 2235 sdata->u.mgd.p2p_noa_index = 2236 bss_conf->p2p_noa_attr.index; 2237 bss_info_changed |= BSS_CHANGED_P2P_PS; 2238 } 2239 } 2240 rcu_read_unlock(); 2241 } 2242 2243 /* just to be sure */ 2244 ieee80211_stop_poll(sdata); 2245 2246 ieee80211_led_assoc(local, 1); 2247 2248 if (sdata->u.mgd.have_beacon) { 2249 /* 2250 * If the AP is buggy we may get here with no DTIM period 2251 * known, so assume it's 1 which is the only safe assumption 2252 * in that case, although if the TIM IE is broken powersave 2253 * probably just won't work at all. 2254 */ 2255 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2256 bss_conf->beacon_rate = bss->beacon_rate; 2257 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2258 } else { 2259 bss_conf->beacon_rate = NULL; 2260 bss_conf->dtim_period = 0; 2261 } 2262 2263 bss_conf->assoc = 1; 2264 2265 /* Tell the driver to monitor connection quality (if supported) */ 2266 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2267 bss_conf->cqm_rssi_thold) 2268 bss_info_changed |= BSS_CHANGED_CQM; 2269 2270 /* Enable ARP filtering */ 2271 if (bss_conf->arp_addr_cnt) 2272 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2273 2274 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2275 2276 mutex_lock(&local->iflist_mtx); 2277 ieee80211_recalc_ps(local); 2278 mutex_unlock(&local->iflist_mtx); 2279 2280 ieee80211_recalc_smps(sdata); 2281 ieee80211_recalc_ps_vif(sdata); 2282 2283 netif_carrier_on(sdata->dev); 2284 } 2285 2286 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2287 u16 stype, u16 reason, bool tx, 2288 u8 *frame_buf) 2289 { 2290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2291 struct ieee80211_local *local = sdata->local; 2292 u32 changed = 0; 2293 2294 sdata_assert_lock(sdata); 2295 2296 if (WARN_ON_ONCE(tx && !frame_buf)) 2297 return; 2298 2299 if (WARN_ON(!ifmgd->associated)) 2300 return; 2301 2302 ieee80211_stop_poll(sdata); 2303 2304 ifmgd->associated = NULL; 2305 netif_carrier_off(sdata->dev); 2306 2307 /* 2308 * if we want to get out of ps before disassoc (why?) we have 2309 * to do it before sending disassoc, as otherwise the null-packet 2310 * won't be valid. 2311 */ 2312 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2313 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2314 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2315 } 2316 local->ps_sdata = NULL; 2317 2318 /* disable per-vif ps */ 2319 ieee80211_recalc_ps_vif(sdata); 2320 2321 /* make sure ongoing transmission finishes */ 2322 synchronize_net(); 2323 2324 /* 2325 * drop any frame before deauth/disassoc, this can be data or 2326 * management frame. Since we are disconnecting, we should not 2327 * insist sending these frames which can take time and delay 2328 * the disconnection and possible the roaming. 2329 */ 2330 if (tx) 2331 ieee80211_flush_queues(local, sdata, true); 2332 2333 /* deauthenticate/disassociate now */ 2334 if (tx || frame_buf) { 2335 /* 2336 * In multi channel scenarios guarantee that the virtual 2337 * interface is granted immediate airtime to transmit the 2338 * deauthentication frame by calling mgd_prepare_tx, if the 2339 * driver requested so. 2340 */ 2341 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2342 !ifmgd->have_beacon) 2343 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2344 2345 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2346 ifmgd->bssid, stype, reason, 2347 tx, frame_buf); 2348 } 2349 2350 /* flush out frame - make sure the deauth was actually sent */ 2351 if (tx) 2352 ieee80211_flush_queues(local, sdata, false); 2353 2354 /* clear bssid only after building the needed mgmt frames */ 2355 eth_zero_addr(ifmgd->bssid); 2356 2357 /* remove AP and TDLS peers */ 2358 sta_info_flush(sdata); 2359 2360 /* finally reset all BSS / config parameters */ 2361 changed |= ieee80211_reset_erp_info(sdata); 2362 2363 ieee80211_led_assoc(local, 0); 2364 changed |= BSS_CHANGED_ASSOC; 2365 sdata->vif.bss_conf.assoc = false; 2366 2367 ifmgd->p2p_noa_index = -1; 2368 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2369 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2370 2371 /* on the next assoc, re-program HT/VHT parameters */ 2372 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2373 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2374 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2375 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2376 2377 /* reset MU-MIMO ownership and group data */ 2378 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2379 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2380 memset(sdata->vif.bss_conf.mu_group.position, 0, 2381 sizeof(sdata->vif.bss_conf.mu_group.position)); 2382 changed |= BSS_CHANGED_MU_GROUPS; 2383 sdata->vif.mu_mimo_owner = false; 2384 2385 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2386 2387 del_timer_sync(&local->dynamic_ps_timer); 2388 cancel_work_sync(&local->dynamic_ps_enable_work); 2389 2390 /* Disable ARP filtering */ 2391 if (sdata->vif.bss_conf.arp_addr_cnt) 2392 changed |= BSS_CHANGED_ARP_FILTER; 2393 2394 sdata->vif.bss_conf.qos = false; 2395 changed |= BSS_CHANGED_QOS; 2396 2397 /* The BSSID (not really interesting) and HT changed */ 2398 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2399 ieee80211_bss_info_change_notify(sdata, changed); 2400 2401 /* disassociated - set to defaults now */ 2402 ieee80211_set_wmm_default(sdata, false, false); 2403 2404 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2405 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2406 del_timer_sync(&sdata->u.mgd.timer); 2407 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2408 2409 sdata->vif.bss_conf.dtim_period = 0; 2410 sdata->vif.bss_conf.beacon_rate = NULL; 2411 2412 ifmgd->have_beacon = false; 2413 2414 ifmgd->flags = 0; 2415 mutex_lock(&local->mtx); 2416 ieee80211_vif_release_channel(sdata); 2417 2418 sdata->vif.csa_active = false; 2419 ifmgd->csa_waiting_bcn = false; 2420 ifmgd->csa_ignored_same_chan = false; 2421 if (sdata->csa_block_tx) { 2422 ieee80211_wake_vif_queues(local, sdata, 2423 IEEE80211_QUEUE_STOP_REASON_CSA); 2424 sdata->csa_block_tx = false; 2425 } 2426 mutex_unlock(&local->mtx); 2427 2428 /* existing TX TSPEC sessions no longer exist */ 2429 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2430 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2431 2432 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2433 } 2434 2435 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2436 struct ieee80211_hdr *hdr) 2437 { 2438 /* 2439 * We can postpone the mgd.timer whenever receiving unicast frames 2440 * from AP because we know that the connection is working both ways 2441 * at that time. But multicast frames (and hence also beacons) must 2442 * be ignored here, because we need to trigger the timer during 2443 * data idle periods for sending the periodic probe request to the 2444 * AP we're connected to. 2445 */ 2446 if (is_multicast_ether_addr(hdr->addr1)) 2447 return; 2448 2449 ieee80211_sta_reset_conn_monitor(sdata); 2450 } 2451 2452 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2453 { 2454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2455 struct ieee80211_local *local = sdata->local; 2456 2457 mutex_lock(&local->mtx); 2458 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2459 goto out; 2460 2461 __ieee80211_stop_poll(sdata); 2462 2463 mutex_lock(&local->iflist_mtx); 2464 ieee80211_recalc_ps(local); 2465 mutex_unlock(&local->iflist_mtx); 2466 2467 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2468 goto out; 2469 2470 /* 2471 * We've received a probe response, but are not sure whether 2472 * we have or will be receiving any beacons or data, so let's 2473 * schedule the timers again, just in case. 2474 */ 2475 ieee80211_sta_reset_beacon_monitor(sdata); 2476 2477 mod_timer(&ifmgd->conn_mon_timer, 2478 round_jiffies_up(jiffies + 2479 IEEE80211_CONNECTION_IDLE_TIME)); 2480 out: 2481 mutex_unlock(&local->mtx); 2482 } 2483 2484 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2485 struct ieee80211_hdr *hdr, 2486 u16 tx_time) 2487 { 2488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2489 u16 tid = ieee80211_get_tid(hdr); 2490 int ac = ieee80211_ac_from_tid(tid); 2491 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2492 unsigned long now = jiffies; 2493 2494 if (likely(!tx_tspec->admitted_time)) 2495 return; 2496 2497 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2498 tx_tspec->consumed_tx_time = 0; 2499 tx_tspec->time_slice_start = now; 2500 2501 if (tx_tspec->downgraded) { 2502 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2503 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2504 } 2505 } 2506 2507 if (tx_tspec->downgraded) 2508 return; 2509 2510 tx_tspec->consumed_tx_time += tx_time; 2511 2512 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2513 tx_tspec->downgraded = true; 2514 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2515 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2516 } 2517 } 2518 2519 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2520 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2521 { 2522 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2523 2524 if (!ieee80211_is_data(hdr->frame_control)) 2525 return; 2526 2527 if (ieee80211_is_any_nullfunc(hdr->frame_control) && 2528 sdata->u.mgd.probe_send_count > 0) { 2529 if (ack) 2530 ieee80211_sta_reset_conn_monitor(sdata); 2531 else 2532 sdata->u.mgd.nullfunc_failed = true; 2533 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2534 return; 2535 } 2536 2537 if (ack) 2538 ieee80211_sta_reset_conn_monitor(sdata); 2539 } 2540 2541 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2542 const u8 *src, const u8 *dst, 2543 const u8 *ssid, size_t ssid_len, 2544 struct ieee80211_channel *channel) 2545 { 2546 struct sk_buff *skb; 2547 2548 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2549 ssid, ssid_len, NULL, 0, 2550 IEEE80211_PROBE_FLAG_DIRECTED); 2551 if (skb) 2552 ieee80211_tx_skb(sdata, skb); 2553 } 2554 2555 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2556 { 2557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2558 const u8 *ssid; 2559 u8 *dst = ifmgd->associated->bssid; 2560 u8 unicast_limit = max(1, max_probe_tries - 3); 2561 struct sta_info *sta; 2562 2563 /* 2564 * Try sending broadcast probe requests for the last three 2565 * probe requests after the first ones failed since some 2566 * buggy APs only support broadcast probe requests. 2567 */ 2568 if (ifmgd->probe_send_count >= unicast_limit) 2569 dst = NULL; 2570 2571 /* 2572 * When the hardware reports an accurate Tx ACK status, it's 2573 * better to send a nullfunc frame instead of a probe request, 2574 * as it will kick us off the AP quickly if we aren't associated 2575 * anymore. The timeout will be reset if the frame is ACKed by 2576 * the AP. 2577 */ 2578 ifmgd->probe_send_count++; 2579 2580 if (dst) { 2581 mutex_lock(&sdata->local->sta_mtx); 2582 sta = sta_info_get(sdata, dst); 2583 if (!WARN_ON(!sta)) 2584 ieee80211_check_fast_rx(sta); 2585 mutex_unlock(&sdata->local->sta_mtx); 2586 } 2587 2588 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2589 ifmgd->nullfunc_failed = false; 2590 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 2591 ifmgd->probe_send_count--; 2592 else 2593 ieee80211_send_nullfunc(sdata->local, sdata, false); 2594 } else { 2595 int ssid_len; 2596 2597 rcu_read_lock(); 2598 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2599 if (WARN_ON_ONCE(ssid == NULL)) 2600 ssid_len = 0; 2601 else 2602 ssid_len = ssid[1]; 2603 2604 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2605 ssid + 2, ssid_len, 2606 ifmgd->associated->channel); 2607 rcu_read_unlock(); 2608 } 2609 2610 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2611 run_again(sdata, ifmgd->probe_timeout); 2612 } 2613 2614 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2615 bool beacon) 2616 { 2617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2618 bool already = false; 2619 2620 if (!ieee80211_sdata_running(sdata)) 2621 return; 2622 2623 sdata_lock(sdata); 2624 2625 if (!ifmgd->associated) 2626 goto out; 2627 2628 mutex_lock(&sdata->local->mtx); 2629 2630 if (sdata->local->tmp_channel || sdata->local->scanning) { 2631 mutex_unlock(&sdata->local->mtx); 2632 goto out; 2633 } 2634 2635 if (beacon) { 2636 mlme_dbg_ratelimited(sdata, 2637 "detected beacon loss from AP (missed %d beacons) - probing\n", 2638 beacon_loss_count); 2639 2640 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2641 } 2642 2643 /* 2644 * The driver/our work has already reported this event or the 2645 * connection monitoring has kicked in and we have already sent 2646 * a probe request. Or maybe the AP died and the driver keeps 2647 * reporting until we disassociate... 2648 * 2649 * In either case we have to ignore the current call to this 2650 * function (except for setting the correct probe reason bit) 2651 * because otherwise we would reset the timer every time and 2652 * never check whether we received a probe response! 2653 */ 2654 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2655 already = true; 2656 2657 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2658 2659 mutex_unlock(&sdata->local->mtx); 2660 2661 if (already) 2662 goto out; 2663 2664 mutex_lock(&sdata->local->iflist_mtx); 2665 ieee80211_recalc_ps(sdata->local); 2666 mutex_unlock(&sdata->local->iflist_mtx); 2667 2668 ifmgd->probe_send_count = 0; 2669 ieee80211_mgd_probe_ap_send(sdata); 2670 out: 2671 sdata_unlock(sdata); 2672 } 2673 2674 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2675 struct ieee80211_vif *vif) 2676 { 2677 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2679 struct cfg80211_bss *cbss; 2680 struct sk_buff *skb; 2681 const u8 *ssid; 2682 int ssid_len; 2683 2684 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2685 return NULL; 2686 2687 sdata_assert_lock(sdata); 2688 2689 if (ifmgd->associated) 2690 cbss = ifmgd->associated; 2691 else if (ifmgd->auth_data) 2692 cbss = ifmgd->auth_data->bss; 2693 else if (ifmgd->assoc_data) 2694 cbss = ifmgd->assoc_data->bss; 2695 else 2696 return NULL; 2697 2698 rcu_read_lock(); 2699 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2700 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2701 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2702 ssid_len = 0; 2703 else 2704 ssid_len = ssid[1]; 2705 2706 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2707 (u32) -1, cbss->channel, 2708 ssid + 2, ssid_len, 2709 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2710 rcu_read_unlock(); 2711 2712 return skb; 2713 } 2714 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2715 2716 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2717 const u8 *buf, size_t len, bool tx, 2718 u16 reason) 2719 { 2720 struct ieee80211_event event = { 2721 .type = MLME_EVENT, 2722 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2723 .u.mlme.reason = reason, 2724 }; 2725 2726 if (tx) 2727 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2728 else 2729 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2730 2731 drv_event_callback(sdata->local, sdata, &event); 2732 } 2733 2734 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2735 { 2736 struct ieee80211_local *local = sdata->local; 2737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2738 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2739 bool tx; 2740 2741 sdata_lock(sdata); 2742 if (!ifmgd->associated) { 2743 sdata_unlock(sdata); 2744 return; 2745 } 2746 2747 tx = !sdata->csa_block_tx; 2748 2749 /* AP is probably out of range (or not reachable for another reason) so 2750 * remove the bss struct for that AP. 2751 */ 2752 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2753 2754 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2755 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2756 tx, frame_buf); 2757 mutex_lock(&local->mtx); 2758 sdata->vif.csa_active = false; 2759 ifmgd->csa_waiting_bcn = false; 2760 if (sdata->csa_block_tx) { 2761 ieee80211_wake_vif_queues(local, sdata, 2762 IEEE80211_QUEUE_STOP_REASON_CSA); 2763 sdata->csa_block_tx = false; 2764 } 2765 mutex_unlock(&local->mtx); 2766 2767 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2768 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2769 2770 sdata_unlock(sdata); 2771 } 2772 2773 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2774 { 2775 struct ieee80211_sub_if_data *sdata = 2776 container_of(work, struct ieee80211_sub_if_data, 2777 u.mgd.beacon_connection_loss_work); 2778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2779 2780 if (ifmgd->associated) 2781 ifmgd->beacon_loss_count++; 2782 2783 if (ifmgd->connection_loss) { 2784 sdata_info(sdata, "Connection to AP %pM lost\n", 2785 ifmgd->bssid); 2786 __ieee80211_disconnect(sdata); 2787 } else { 2788 ieee80211_mgd_probe_ap(sdata, true); 2789 } 2790 } 2791 2792 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2793 { 2794 struct ieee80211_sub_if_data *sdata = 2795 container_of(work, struct ieee80211_sub_if_data, 2796 u.mgd.csa_connection_drop_work); 2797 2798 __ieee80211_disconnect(sdata); 2799 } 2800 2801 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2802 { 2803 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2804 struct ieee80211_hw *hw = &sdata->local->hw; 2805 2806 trace_api_beacon_loss(sdata); 2807 2808 sdata->u.mgd.connection_loss = false; 2809 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2810 } 2811 EXPORT_SYMBOL(ieee80211_beacon_loss); 2812 2813 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2814 { 2815 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2816 struct ieee80211_hw *hw = &sdata->local->hw; 2817 2818 trace_api_connection_loss(sdata); 2819 2820 sdata->u.mgd.connection_loss = true; 2821 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2822 } 2823 EXPORT_SYMBOL(ieee80211_connection_loss); 2824 2825 2826 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2827 bool assoc) 2828 { 2829 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2830 2831 sdata_assert_lock(sdata); 2832 2833 if (!assoc) { 2834 /* 2835 * we are not authenticated yet, the only timer that could be 2836 * running is the timeout for the authentication response which 2837 * which is not relevant anymore. 2838 */ 2839 del_timer_sync(&sdata->u.mgd.timer); 2840 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2841 2842 eth_zero_addr(sdata->u.mgd.bssid); 2843 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2844 sdata->u.mgd.flags = 0; 2845 mutex_lock(&sdata->local->mtx); 2846 ieee80211_vif_release_channel(sdata); 2847 mutex_unlock(&sdata->local->mtx); 2848 } 2849 2850 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2851 kfree(auth_data); 2852 sdata->u.mgd.auth_data = NULL; 2853 } 2854 2855 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2856 bool assoc, bool abandon) 2857 { 2858 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2859 2860 sdata_assert_lock(sdata); 2861 2862 if (!assoc) { 2863 /* 2864 * we are not associated yet, the only timer that could be 2865 * running is the timeout for the association response which 2866 * which is not relevant anymore. 2867 */ 2868 del_timer_sync(&sdata->u.mgd.timer); 2869 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2870 2871 eth_zero_addr(sdata->u.mgd.bssid); 2872 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2873 sdata->u.mgd.flags = 0; 2874 sdata->vif.mu_mimo_owner = false; 2875 2876 mutex_lock(&sdata->local->mtx); 2877 ieee80211_vif_release_channel(sdata); 2878 mutex_unlock(&sdata->local->mtx); 2879 2880 if (abandon) 2881 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2882 } 2883 2884 kfree(assoc_data); 2885 sdata->u.mgd.assoc_data = NULL; 2886 } 2887 2888 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2889 struct ieee80211_mgmt *mgmt, size_t len) 2890 { 2891 struct ieee80211_local *local = sdata->local; 2892 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2893 u8 *pos; 2894 struct ieee802_11_elems elems; 2895 u32 tx_flags = 0; 2896 2897 pos = mgmt->u.auth.variable; 2898 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2899 mgmt->bssid, auth_data->bss->bssid); 2900 if (!elems.challenge) 2901 return; 2902 auth_data->expected_transaction = 4; 2903 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2904 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2905 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2906 IEEE80211_TX_INTFL_MLME_CONN_TX; 2907 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2908 elems.challenge - 2, elems.challenge_len + 2, 2909 auth_data->bss->bssid, auth_data->bss->bssid, 2910 auth_data->key, auth_data->key_len, 2911 auth_data->key_idx, tx_flags); 2912 } 2913 2914 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2915 const u8 *bssid) 2916 { 2917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2918 struct sta_info *sta; 2919 bool result = true; 2920 2921 sdata_info(sdata, "authenticated\n"); 2922 ifmgd->auth_data->done = true; 2923 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2924 ifmgd->auth_data->timeout_started = true; 2925 run_again(sdata, ifmgd->auth_data->timeout); 2926 2927 /* move station state to auth */ 2928 mutex_lock(&sdata->local->sta_mtx); 2929 sta = sta_info_get(sdata, bssid); 2930 if (!sta) { 2931 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2932 result = false; 2933 goto out; 2934 } 2935 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2936 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2937 result = false; 2938 goto out; 2939 } 2940 2941 out: 2942 mutex_unlock(&sdata->local->sta_mtx); 2943 return result; 2944 } 2945 2946 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2947 struct ieee80211_mgmt *mgmt, size_t len) 2948 { 2949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2950 u8 bssid[ETH_ALEN]; 2951 u16 auth_alg, auth_transaction, status_code; 2952 struct ieee80211_event event = { 2953 .type = MLME_EVENT, 2954 .u.mlme.data = AUTH_EVENT, 2955 }; 2956 2957 sdata_assert_lock(sdata); 2958 2959 if (len < 24 + 6) 2960 return; 2961 2962 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2963 return; 2964 2965 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2966 2967 if (!ether_addr_equal(bssid, mgmt->bssid)) 2968 return; 2969 2970 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2971 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2972 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2973 2974 if (auth_alg != ifmgd->auth_data->algorithm || 2975 (auth_alg != WLAN_AUTH_SAE && 2976 auth_transaction != ifmgd->auth_data->expected_transaction) || 2977 (auth_alg == WLAN_AUTH_SAE && 2978 (auth_transaction < ifmgd->auth_data->expected_transaction || 2979 auth_transaction > 2))) { 2980 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2981 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2982 auth_transaction, 2983 ifmgd->auth_data->expected_transaction); 2984 return; 2985 } 2986 2987 if (status_code != WLAN_STATUS_SUCCESS) { 2988 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2989 2990 if (auth_alg == WLAN_AUTH_SAE && 2991 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 2992 (auth_transaction == 1 && 2993 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 2994 status_code == WLAN_STATUS_SAE_PK)))) 2995 return; 2996 2997 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2998 mgmt->sa, status_code); 2999 ieee80211_destroy_auth_data(sdata, false); 3000 event.u.mlme.status = MLME_DENIED; 3001 event.u.mlme.reason = status_code; 3002 drv_event_callback(sdata->local, sdata, &event); 3003 return; 3004 } 3005 3006 switch (ifmgd->auth_data->algorithm) { 3007 case WLAN_AUTH_OPEN: 3008 case WLAN_AUTH_LEAP: 3009 case WLAN_AUTH_FT: 3010 case WLAN_AUTH_SAE: 3011 case WLAN_AUTH_FILS_SK: 3012 case WLAN_AUTH_FILS_SK_PFS: 3013 case WLAN_AUTH_FILS_PK: 3014 break; 3015 case WLAN_AUTH_SHARED_KEY: 3016 if (ifmgd->auth_data->expected_transaction != 4) { 3017 ieee80211_auth_challenge(sdata, mgmt, len); 3018 /* need another frame */ 3019 return; 3020 } 3021 break; 3022 default: 3023 WARN_ONCE(1, "invalid auth alg %d", 3024 ifmgd->auth_data->algorithm); 3025 return; 3026 } 3027 3028 event.u.mlme.status = MLME_SUCCESS; 3029 drv_event_callback(sdata->local, sdata, &event); 3030 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3031 (auth_transaction == 2 && 3032 ifmgd->auth_data->expected_transaction == 2)) { 3033 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3034 return; /* ignore frame -- wait for timeout */ 3035 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3036 auth_transaction == 2) { 3037 sdata_info(sdata, "SAE peer confirmed\n"); 3038 ifmgd->auth_data->peer_confirmed = true; 3039 } 3040 3041 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3042 } 3043 3044 #define case_WLAN(type) \ 3045 case WLAN_REASON_##type: return #type 3046 3047 const char *ieee80211_get_reason_code_string(u16 reason_code) 3048 { 3049 switch (reason_code) { 3050 case_WLAN(UNSPECIFIED); 3051 case_WLAN(PREV_AUTH_NOT_VALID); 3052 case_WLAN(DEAUTH_LEAVING); 3053 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3054 case_WLAN(DISASSOC_AP_BUSY); 3055 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3056 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3057 case_WLAN(DISASSOC_STA_HAS_LEFT); 3058 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3059 case_WLAN(DISASSOC_BAD_POWER); 3060 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3061 case_WLAN(INVALID_IE); 3062 case_WLAN(MIC_FAILURE); 3063 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3064 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3065 case_WLAN(IE_DIFFERENT); 3066 case_WLAN(INVALID_GROUP_CIPHER); 3067 case_WLAN(INVALID_PAIRWISE_CIPHER); 3068 case_WLAN(INVALID_AKMP); 3069 case_WLAN(UNSUPP_RSN_VERSION); 3070 case_WLAN(INVALID_RSN_IE_CAP); 3071 case_WLAN(IEEE8021X_FAILED); 3072 case_WLAN(CIPHER_SUITE_REJECTED); 3073 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3074 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3075 case_WLAN(DISASSOC_LOW_ACK); 3076 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3077 case_WLAN(QSTA_LEAVE_QBSS); 3078 case_WLAN(QSTA_NOT_USE); 3079 case_WLAN(QSTA_REQUIRE_SETUP); 3080 case_WLAN(QSTA_TIMEOUT); 3081 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3082 case_WLAN(MESH_PEER_CANCELED); 3083 case_WLAN(MESH_MAX_PEERS); 3084 case_WLAN(MESH_CONFIG); 3085 case_WLAN(MESH_CLOSE); 3086 case_WLAN(MESH_MAX_RETRIES); 3087 case_WLAN(MESH_CONFIRM_TIMEOUT); 3088 case_WLAN(MESH_INVALID_GTK); 3089 case_WLAN(MESH_INCONSISTENT_PARAM); 3090 case_WLAN(MESH_INVALID_SECURITY); 3091 case_WLAN(MESH_PATH_ERROR); 3092 case_WLAN(MESH_PATH_NOFORWARD); 3093 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3094 case_WLAN(MAC_EXISTS_IN_MBSS); 3095 case_WLAN(MESH_CHAN_REGULATORY); 3096 case_WLAN(MESH_CHAN); 3097 default: return "<unknown>"; 3098 } 3099 } 3100 3101 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3102 struct ieee80211_mgmt *mgmt, size_t len) 3103 { 3104 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3105 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3106 3107 sdata_assert_lock(sdata); 3108 3109 if (len < 24 + 2) 3110 return; 3111 3112 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3113 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3114 return; 3115 } 3116 3117 if (ifmgd->associated && 3118 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3119 const u8 *bssid = ifmgd->associated->bssid; 3120 3121 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3122 bssid, reason_code, 3123 ieee80211_get_reason_code_string(reason_code)); 3124 3125 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3126 3127 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3128 reason_code); 3129 return; 3130 } 3131 3132 if (ifmgd->assoc_data && 3133 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3134 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3135 3136 sdata_info(sdata, 3137 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3138 bssid, reason_code, 3139 ieee80211_get_reason_code_string(reason_code)); 3140 3141 ieee80211_destroy_assoc_data(sdata, false, true); 3142 3143 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3144 return; 3145 } 3146 } 3147 3148 3149 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3150 struct ieee80211_mgmt *mgmt, size_t len) 3151 { 3152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3153 u16 reason_code; 3154 3155 sdata_assert_lock(sdata); 3156 3157 if (len < 24 + 2) 3158 return; 3159 3160 if (!ifmgd->associated || 3161 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3162 return; 3163 3164 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3165 3166 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3167 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3168 return; 3169 } 3170 3171 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3172 mgmt->sa, reason_code, 3173 ieee80211_get_reason_code_string(reason_code)); 3174 3175 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3176 3177 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3178 } 3179 3180 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3181 u8 *supp_rates, unsigned int supp_rates_len, 3182 u32 *rates, u32 *basic_rates, 3183 bool *have_higher_than_11mbit, 3184 int *min_rate, int *min_rate_index, 3185 int shift) 3186 { 3187 int i, j; 3188 3189 for (i = 0; i < supp_rates_len; i++) { 3190 int rate = supp_rates[i] & 0x7f; 3191 bool is_basic = !!(supp_rates[i] & 0x80); 3192 3193 if ((rate * 5 * (1 << shift)) > 110) 3194 *have_higher_than_11mbit = true; 3195 3196 /* 3197 * Skip HT, VHT and HE BSS membership selectors since they're 3198 * not rates. 3199 * 3200 * Note: Even though the membership selector and the basic 3201 * rate flag share the same bit, they are not exactly 3202 * the same. 3203 */ 3204 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3205 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3206 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY)) 3207 continue; 3208 3209 for (j = 0; j < sband->n_bitrates; j++) { 3210 struct ieee80211_rate *br; 3211 int brate; 3212 3213 br = &sband->bitrates[j]; 3214 3215 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3216 if (brate == rate) { 3217 *rates |= BIT(j); 3218 if (is_basic) 3219 *basic_rates |= BIT(j); 3220 if ((rate * 5) < *min_rate) { 3221 *min_rate = rate * 5; 3222 *min_rate_index = j; 3223 } 3224 break; 3225 } 3226 } 3227 } 3228 } 3229 3230 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3231 const struct ieee802_11_elems *elems) 3232 { 3233 if (elems->ext_capab_len < 10) 3234 return false; 3235 3236 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3237 return false; 3238 3239 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3240 IEEE80211_HE_MAC_CAP0_TWT_RES; 3241 } 3242 3243 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3244 struct sta_info *sta, 3245 struct ieee802_11_elems *elems) 3246 { 3247 bool twt = ieee80211_twt_req_supported(sta, elems); 3248 3249 if (sdata->vif.bss_conf.twt_requester != twt) { 3250 sdata->vif.bss_conf.twt_requester = twt; 3251 return BSS_CHANGED_TWT; 3252 } 3253 return 0; 3254 } 3255 3256 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3257 struct cfg80211_bss *cbss, 3258 struct ieee80211_mgmt *mgmt, size_t len, 3259 struct ieee802_11_elems *elems) 3260 { 3261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3262 struct ieee80211_local *local = sdata->local; 3263 struct ieee80211_supported_band *sband; 3264 struct sta_info *sta; 3265 u16 capab_info, aid; 3266 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3267 const struct cfg80211_bss_ies *bss_ies = NULL; 3268 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3269 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3270 u32 changed = 0; 3271 int err; 3272 bool ret; 3273 3274 /* AssocResp and ReassocResp have identical structure */ 3275 3276 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3277 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3278 3279 /* 3280 * The 5 MSB of the AID field are reserved 3281 * (802.11-2016 9.4.1.8 AID field) 3282 */ 3283 aid &= 0x7ff; 3284 3285 ifmgd->broken_ap = false; 3286 3287 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3288 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3289 aid); 3290 aid = 0; 3291 ifmgd->broken_ap = true; 3292 } 3293 3294 if (!elems->supp_rates) { 3295 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3296 return false; 3297 } 3298 3299 sdata->vif.bss_conf.aid = aid; 3300 ifmgd->tdls_chan_switch_prohibited = 3301 elems->ext_capab && elems->ext_capab_len >= 5 && 3302 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3303 3304 /* 3305 * Some APs are erroneously not including some information in their 3306 * (re)association response frames. Try to recover by using the data 3307 * from the beacon or probe response. This seems to afflict mobile 3308 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3309 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3310 */ 3311 if (!is_6ghz && 3312 ((assoc_data->wmm && !elems->wmm_param) || 3313 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3314 (!elems->ht_cap_elem || !elems->ht_operation)) || 3315 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3316 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3317 const struct cfg80211_bss_ies *ies; 3318 struct ieee802_11_elems bss_elems; 3319 3320 rcu_read_lock(); 3321 ies = rcu_dereference(cbss->ies); 3322 if (ies) 3323 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3324 GFP_ATOMIC); 3325 rcu_read_unlock(); 3326 if (!bss_ies) 3327 return false; 3328 3329 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3330 false, &bss_elems, 3331 mgmt->bssid, 3332 assoc_data->bss->bssid); 3333 if (assoc_data->wmm && 3334 !elems->wmm_param && bss_elems.wmm_param) { 3335 elems->wmm_param = bss_elems.wmm_param; 3336 sdata_info(sdata, 3337 "AP bug: WMM param missing from AssocResp\n"); 3338 } 3339 3340 /* 3341 * Also check if we requested HT/VHT, otherwise the AP doesn't 3342 * have to include the IEs in the (re)association response. 3343 */ 3344 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3345 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3346 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3347 sdata_info(sdata, 3348 "AP bug: HT capability missing from AssocResp\n"); 3349 } 3350 if (!elems->ht_operation && bss_elems.ht_operation && 3351 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3352 elems->ht_operation = bss_elems.ht_operation; 3353 sdata_info(sdata, 3354 "AP bug: HT operation missing from AssocResp\n"); 3355 } 3356 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3357 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3358 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3359 sdata_info(sdata, 3360 "AP bug: VHT capa missing from AssocResp\n"); 3361 } 3362 if (!elems->vht_operation && bss_elems.vht_operation && 3363 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3364 elems->vht_operation = bss_elems.vht_operation; 3365 sdata_info(sdata, 3366 "AP bug: VHT operation missing from AssocResp\n"); 3367 } 3368 } 3369 3370 /* 3371 * We previously checked these in the beacon/probe response, so 3372 * they should be present here. This is just a safety net. 3373 */ 3374 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3375 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3376 sdata_info(sdata, 3377 "HT AP is missing WMM params or HT capability/operation\n"); 3378 ret = false; 3379 goto out; 3380 } 3381 3382 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3383 (!elems->vht_cap_elem || !elems->vht_operation)) { 3384 sdata_info(sdata, 3385 "VHT AP is missing VHT capability/operation\n"); 3386 ret = false; 3387 goto out; 3388 } 3389 3390 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3391 !elems->he_6ghz_capa) { 3392 sdata_info(sdata, 3393 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3394 ret = false; 3395 goto out; 3396 } 3397 3398 mutex_lock(&sdata->local->sta_mtx); 3399 /* 3400 * station info was already allocated and inserted before 3401 * the association and should be available to us 3402 */ 3403 sta = sta_info_get(sdata, cbss->bssid); 3404 if (WARN_ON(!sta)) { 3405 mutex_unlock(&sdata->local->sta_mtx); 3406 ret = false; 3407 goto out; 3408 } 3409 3410 sband = ieee80211_get_sband(sdata); 3411 if (!sband) { 3412 mutex_unlock(&sdata->local->sta_mtx); 3413 ret = false; 3414 goto out; 3415 } 3416 3417 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3418 (!elems->he_cap || !elems->he_operation)) { 3419 mutex_unlock(&sdata->local->sta_mtx); 3420 sdata_info(sdata, 3421 "HE AP is missing HE capability/operation\n"); 3422 ret = false; 3423 goto out; 3424 } 3425 3426 /* Set up internal HT/VHT capabilities */ 3427 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3428 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3429 elems->ht_cap_elem, sta); 3430 3431 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3432 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3433 elems->vht_cap_elem, sta); 3434 3435 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3436 elems->he_cap) { 3437 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3438 elems->he_cap, 3439 elems->he_cap_len, 3440 elems->he_6ghz_capa, 3441 sta); 3442 3443 bss_conf->he_support = sta->sta.he_cap.has_he; 3444 if (elems->rsnx && elems->rsnx_len && 3445 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3446 wiphy_ext_feature_isset(local->hw.wiphy, 3447 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3448 bss_conf->twt_protected = true; 3449 else 3450 bss_conf->twt_protected = false; 3451 3452 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3453 } else { 3454 bss_conf->he_support = false; 3455 bss_conf->twt_requester = false; 3456 bss_conf->twt_protected = false; 3457 } 3458 3459 if (bss_conf->he_support) { 3460 bss_conf->he_bss_color.color = 3461 le32_get_bits(elems->he_operation->he_oper_params, 3462 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3463 bss_conf->he_bss_color.partial = 3464 le32_get_bits(elems->he_operation->he_oper_params, 3465 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3466 bss_conf->he_bss_color.enabled = 3467 !le32_get_bits(elems->he_operation->he_oper_params, 3468 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3469 3470 if (bss_conf->he_bss_color.enabled) 3471 changed |= BSS_CHANGED_HE_BSS_COLOR; 3472 3473 bss_conf->htc_trig_based_pkt_ext = 3474 le32_get_bits(elems->he_operation->he_oper_params, 3475 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3476 bss_conf->frame_time_rts_th = 3477 le32_get_bits(elems->he_operation->he_oper_params, 3478 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3479 3480 bss_conf->multi_sta_back_32bit = 3481 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3482 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3483 3484 bss_conf->ack_enabled = 3485 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3486 IEEE80211_HE_MAC_CAP2_ACK_EN; 3487 3488 bss_conf->uora_exists = !!elems->uora_element; 3489 if (elems->uora_element) 3490 bss_conf->uora_ocw_range = elems->uora_element[0]; 3491 3492 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3493 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3494 /* TODO: OPEN: what happens if BSS color disable is set? */ 3495 } 3496 3497 if (cbss->transmitted_bss) { 3498 bss_conf->nontransmitted = true; 3499 ether_addr_copy(bss_conf->transmitter_bssid, 3500 cbss->transmitted_bss->bssid); 3501 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3502 bss_conf->bssid_index = cbss->bssid_index; 3503 } 3504 3505 /* 3506 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3507 * in their association response, so ignore that data for our own 3508 * configuration. If it changed since the last beacon, we'll get the 3509 * next beacon and update then. 3510 */ 3511 3512 /* 3513 * If an operating mode notification IE is present, override the 3514 * NSS calculation (that would be done in rate_control_rate_init()) 3515 * and use the # of streams from that element. 3516 */ 3517 if (elems->opmode_notif && 3518 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3519 u8 nss; 3520 3521 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3522 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3523 nss += 1; 3524 sta->sta.rx_nss = nss; 3525 } 3526 3527 rate_control_rate_init(sta); 3528 3529 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3530 set_sta_flag(sta, WLAN_STA_MFP); 3531 sta->sta.mfp = true; 3532 } else { 3533 sta->sta.mfp = false; 3534 } 3535 3536 sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3537 3538 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3539 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3540 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3541 if (err) { 3542 sdata_info(sdata, 3543 "failed to move station %pM to desired state\n", 3544 sta->sta.addr); 3545 WARN_ON(__sta_info_destroy(sta)); 3546 mutex_unlock(&sdata->local->sta_mtx); 3547 ret = false; 3548 goto out; 3549 } 3550 3551 mutex_unlock(&sdata->local->sta_mtx); 3552 3553 /* 3554 * Always handle WMM once after association regardless 3555 * of the first value the AP uses. Setting -1 here has 3556 * that effect because the AP values is an unsigned 3557 * 4-bit value. 3558 */ 3559 ifmgd->wmm_last_param_set = -1; 3560 ifmgd->mu_edca_last_param_set = -1; 3561 3562 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3563 ieee80211_set_wmm_default(sdata, false, false); 3564 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3565 elems->wmm_param_len, 3566 elems->mu_edca_param_set)) { 3567 /* still enable QoS since we might have HT/VHT */ 3568 ieee80211_set_wmm_default(sdata, false, true); 3569 /* set the disable-WMM flag in this case to disable 3570 * tracking WMM parameter changes in the beacon if 3571 * the parameters weren't actually valid. Doing so 3572 * avoids changing parameters very strangely when 3573 * the AP is going back and forth between valid and 3574 * invalid parameters. 3575 */ 3576 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3577 } 3578 changed |= BSS_CHANGED_QOS; 3579 3580 if (elems->max_idle_period_ie) { 3581 bss_conf->max_idle_period = 3582 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3583 bss_conf->protected_keep_alive = 3584 !!(elems->max_idle_period_ie->idle_options & 3585 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3586 changed |= BSS_CHANGED_KEEP_ALIVE; 3587 } else { 3588 bss_conf->max_idle_period = 0; 3589 bss_conf->protected_keep_alive = false; 3590 } 3591 3592 /* set assoc capability (AID was already set earlier), 3593 * ieee80211_set_associated() will tell the driver */ 3594 bss_conf->assoc_capability = capab_info; 3595 ieee80211_set_associated(sdata, cbss, changed); 3596 3597 /* 3598 * If we're using 4-addr mode, let the AP know that we're 3599 * doing so, so that it can create the STA VLAN on its side 3600 */ 3601 if (ifmgd->use_4addr) 3602 ieee80211_send_4addr_nullfunc(local, sdata); 3603 3604 /* 3605 * Start timer to probe the connection to the AP now. 3606 * Also start the timer that will detect beacon loss. 3607 */ 3608 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3609 ieee80211_sta_reset_beacon_monitor(sdata); 3610 3611 ret = true; 3612 out: 3613 kfree(bss_ies); 3614 return ret; 3615 } 3616 3617 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3618 struct ieee80211_mgmt *mgmt, 3619 size_t len) 3620 { 3621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3622 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3623 u16 capab_info, status_code, aid; 3624 struct ieee802_11_elems elems; 3625 int ac, uapsd_queues = -1; 3626 u8 *pos; 3627 bool reassoc; 3628 struct cfg80211_bss *bss; 3629 struct ieee80211_event event = { 3630 .type = MLME_EVENT, 3631 .u.mlme.data = ASSOC_EVENT, 3632 }; 3633 3634 sdata_assert_lock(sdata); 3635 3636 if (!assoc_data) 3637 return; 3638 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3639 return; 3640 3641 /* 3642 * AssocResp and ReassocResp have identical structure, so process both 3643 * of them in this function. 3644 */ 3645 3646 if (len < 24 + 6) 3647 return; 3648 3649 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3650 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3651 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3652 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3653 3654 sdata_info(sdata, 3655 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3656 reassoc ? "Rea" : "A", mgmt->sa, 3657 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3658 3659 if (assoc_data->fils_kek_len && 3660 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3661 return; 3662 3663 pos = mgmt->u.assoc_resp.variable; 3664 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3665 mgmt->bssid, assoc_data->bss->bssid); 3666 3667 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3668 elems.timeout_int && 3669 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3670 u32 tu, ms; 3671 tu = le32_to_cpu(elems.timeout_int->value); 3672 ms = tu * 1024 / 1000; 3673 sdata_info(sdata, 3674 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3675 mgmt->sa, tu, ms); 3676 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3677 assoc_data->timeout_started = true; 3678 if (ms > IEEE80211_ASSOC_TIMEOUT) 3679 run_again(sdata, assoc_data->timeout); 3680 return; 3681 } 3682 3683 bss = assoc_data->bss; 3684 3685 if (status_code != WLAN_STATUS_SUCCESS) { 3686 sdata_info(sdata, "%pM denied association (code=%d)\n", 3687 mgmt->sa, status_code); 3688 ieee80211_destroy_assoc_data(sdata, false, false); 3689 event.u.mlme.status = MLME_DENIED; 3690 event.u.mlme.reason = status_code; 3691 drv_event_callback(sdata->local, sdata, &event); 3692 } else { 3693 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) { 3694 /* oops -- internal error -- send timeout for now */ 3695 ieee80211_destroy_assoc_data(sdata, false, false); 3696 cfg80211_assoc_timeout(sdata->dev, bss); 3697 return; 3698 } 3699 event.u.mlme.status = MLME_SUCCESS; 3700 drv_event_callback(sdata->local, sdata, &event); 3701 sdata_info(sdata, "associated\n"); 3702 3703 /* 3704 * destroy assoc_data afterwards, as otherwise an idle 3705 * recalc after assoc_data is NULL but before associated 3706 * is set can cause the interface to go idle 3707 */ 3708 ieee80211_destroy_assoc_data(sdata, true, false); 3709 3710 /* get uapsd queues configuration */ 3711 uapsd_queues = 0; 3712 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3713 if (sdata->tx_conf[ac].uapsd) 3714 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3715 } 3716 3717 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues, 3718 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3719 } 3720 3721 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3722 struct ieee80211_mgmt *mgmt, size_t len, 3723 struct ieee80211_rx_status *rx_status) 3724 { 3725 struct ieee80211_local *local = sdata->local; 3726 struct ieee80211_bss *bss; 3727 struct ieee80211_channel *channel; 3728 3729 sdata_assert_lock(sdata); 3730 3731 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3732 ieee80211_rx_status_to_khz(rx_status)); 3733 if (!channel) 3734 return; 3735 3736 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3737 if (bss) { 3738 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3739 ieee80211_rx_bss_put(local, bss); 3740 } 3741 } 3742 3743 3744 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3745 struct sk_buff *skb) 3746 { 3747 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3748 struct ieee80211_if_managed *ifmgd; 3749 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3750 struct ieee80211_channel *channel; 3751 size_t baselen, len = skb->len; 3752 3753 ifmgd = &sdata->u.mgd; 3754 3755 sdata_assert_lock(sdata); 3756 3757 /* 3758 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3759 * "If a 6 GHz AP receives a Probe Request frame and responds with 3760 * a Probe Response frame [..], the Address 1 field of the Probe 3761 * Response frame shall be set to the broadcast address [..]" 3762 * So, on 6GHz band we should also accept broadcast responses. 3763 */ 3764 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3765 rx_status->freq); 3766 if (!channel) 3767 return; 3768 3769 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3770 (channel->band != NL80211_BAND_6GHZ || 3771 !is_broadcast_ether_addr(mgmt->da))) 3772 return; /* ignore ProbeResp to foreign address */ 3773 3774 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3775 if (baselen > len) 3776 return; 3777 3778 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3779 3780 if (ifmgd->associated && 3781 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3782 ieee80211_reset_ap_probe(sdata); 3783 } 3784 3785 /* 3786 * This is the canonical list of information elements we care about, 3787 * the filter code also gives us all changes to the Microsoft OUI 3788 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3789 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3790 * changes to requested client power. 3791 * 3792 * We implement beacon filtering in software since that means we can 3793 * avoid processing the frame here and in cfg80211, and userspace 3794 * will not be able to tell whether the hardware supports it or not. 3795 * 3796 * XXX: This list needs to be dynamic -- userspace needs to be able to 3797 * add items it requires. It also needs to be able to tell us to 3798 * look out for other vendor IEs. 3799 */ 3800 static const u64 care_about_ies = 3801 (1ULL << WLAN_EID_COUNTRY) | 3802 (1ULL << WLAN_EID_ERP_INFO) | 3803 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3804 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3805 (1ULL << WLAN_EID_HT_CAPABILITY) | 3806 (1ULL << WLAN_EID_HT_OPERATION) | 3807 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3808 3809 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3810 struct ieee80211_if_managed *ifmgd, 3811 struct ieee80211_bss_conf *bss_conf, 3812 struct ieee80211_local *local, 3813 struct ieee80211_rx_status *rx_status) 3814 { 3815 /* Track average RSSI from the Beacon frames of the current AP */ 3816 3817 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3818 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3819 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3820 ifmgd->last_cqm_event_signal = 0; 3821 ifmgd->count_beacon_signal = 1; 3822 ifmgd->last_ave_beacon_signal = 0; 3823 } else { 3824 ifmgd->count_beacon_signal++; 3825 } 3826 3827 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3828 3829 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3830 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3831 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3832 int last_sig = ifmgd->last_ave_beacon_signal; 3833 struct ieee80211_event event = { 3834 .type = RSSI_EVENT, 3835 }; 3836 3837 /* 3838 * if signal crosses either of the boundaries, invoke callback 3839 * with appropriate parameters 3840 */ 3841 if (sig > ifmgd->rssi_max_thold && 3842 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3843 ifmgd->last_ave_beacon_signal = sig; 3844 event.u.rssi.data = RSSI_EVENT_HIGH; 3845 drv_event_callback(local, sdata, &event); 3846 } else if (sig < ifmgd->rssi_min_thold && 3847 (last_sig >= ifmgd->rssi_max_thold || 3848 last_sig == 0)) { 3849 ifmgd->last_ave_beacon_signal = sig; 3850 event.u.rssi.data = RSSI_EVENT_LOW; 3851 drv_event_callback(local, sdata, &event); 3852 } 3853 } 3854 3855 if (bss_conf->cqm_rssi_thold && 3856 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3857 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3858 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3859 int last_event = ifmgd->last_cqm_event_signal; 3860 int thold = bss_conf->cqm_rssi_thold; 3861 int hyst = bss_conf->cqm_rssi_hyst; 3862 3863 if (sig < thold && 3864 (last_event == 0 || sig < last_event - hyst)) { 3865 ifmgd->last_cqm_event_signal = sig; 3866 ieee80211_cqm_rssi_notify( 3867 &sdata->vif, 3868 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3869 sig, GFP_KERNEL); 3870 } else if (sig > thold && 3871 (last_event == 0 || sig > last_event + hyst)) { 3872 ifmgd->last_cqm_event_signal = sig; 3873 ieee80211_cqm_rssi_notify( 3874 &sdata->vif, 3875 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3876 sig, GFP_KERNEL); 3877 } 3878 } 3879 3880 if (bss_conf->cqm_rssi_low && 3881 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3882 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3883 int last_event = ifmgd->last_cqm_event_signal; 3884 int low = bss_conf->cqm_rssi_low; 3885 int high = bss_conf->cqm_rssi_high; 3886 3887 if (sig < low && 3888 (last_event == 0 || last_event >= low)) { 3889 ifmgd->last_cqm_event_signal = sig; 3890 ieee80211_cqm_rssi_notify( 3891 &sdata->vif, 3892 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3893 sig, GFP_KERNEL); 3894 } else if (sig > high && 3895 (last_event == 0 || last_event <= high)) { 3896 ifmgd->last_cqm_event_signal = sig; 3897 ieee80211_cqm_rssi_notify( 3898 &sdata->vif, 3899 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3900 sig, GFP_KERNEL); 3901 } 3902 } 3903 } 3904 3905 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3906 struct cfg80211_bss *bss) 3907 { 3908 if (ether_addr_equal(tx_bssid, bss->bssid)) 3909 return true; 3910 if (!bss->transmitted_bss) 3911 return false; 3912 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3913 } 3914 3915 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3916 struct ieee80211_mgmt *mgmt, size_t len, 3917 struct ieee80211_rx_status *rx_status) 3918 { 3919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3920 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3921 size_t baselen; 3922 struct ieee802_11_elems elems; 3923 struct ieee80211_local *local = sdata->local; 3924 struct ieee80211_chanctx_conf *chanctx_conf; 3925 struct ieee80211_channel *chan; 3926 struct sta_info *sta; 3927 u32 changed = 0; 3928 bool erp_valid; 3929 u8 erp_value = 0; 3930 u32 ncrc; 3931 u8 *bssid; 3932 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3933 3934 sdata_assert_lock(sdata); 3935 3936 /* Process beacon from the current BSS */ 3937 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3938 if (baselen > len) 3939 return; 3940 3941 rcu_read_lock(); 3942 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3943 if (!chanctx_conf) { 3944 rcu_read_unlock(); 3945 return; 3946 } 3947 3948 if (ieee80211_rx_status_to_khz(rx_status) != 3949 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 3950 rcu_read_unlock(); 3951 return; 3952 } 3953 chan = chanctx_conf->def.chan; 3954 rcu_read_unlock(); 3955 3956 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3957 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) { 3958 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3959 len - baselen, false, &elems, 3960 mgmt->bssid, 3961 ifmgd->assoc_data->bss->bssid); 3962 3963 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3964 3965 if (elems.dtim_period) 3966 ifmgd->dtim_period = elems.dtim_period; 3967 ifmgd->have_beacon = true; 3968 ifmgd->assoc_data->need_beacon = false; 3969 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3970 sdata->vif.bss_conf.sync_tsf = 3971 le64_to_cpu(mgmt->u.beacon.timestamp); 3972 sdata->vif.bss_conf.sync_device_ts = 3973 rx_status->device_timestamp; 3974 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3975 } 3976 3977 if (elems.mbssid_config_ie) 3978 bss_conf->profile_periodicity = 3979 elems.mbssid_config_ie->profile_periodicity; 3980 3981 if (elems.ext_capab_len >= 11 && 3982 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 3983 bss_conf->ema_ap = true; 3984 3985 /* continue assoc process */ 3986 ifmgd->assoc_data->timeout = jiffies; 3987 ifmgd->assoc_data->timeout_started = true; 3988 run_again(sdata, ifmgd->assoc_data->timeout); 3989 return; 3990 } 3991 3992 if (!ifmgd->associated || 3993 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated)) 3994 return; 3995 bssid = ifmgd->associated->bssid; 3996 3997 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3998 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3999 local, rx_status); 4000 4001 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4002 mlme_dbg_ratelimited(sdata, 4003 "cancelling AP probe due to a received beacon\n"); 4004 ieee80211_reset_ap_probe(sdata); 4005 } 4006 4007 /* 4008 * Push the beacon loss detection into the future since 4009 * we are processing a beacon from the AP just now. 4010 */ 4011 ieee80211_sta_reset_beacon_monitor(sdata); 4012 4013 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4014 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 4015 len - baselen, false, &elems, 4016 care_about_ies, ncrc, 4017 mgmt->bssid, bssid); 4018 4019 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4020 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) { 4021 if (local->hw.conf.dynamic_ps_timeout > 0) { 4022 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4023 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4024 ieee80211_hw_config(local, 4025 IEEE80211_CONF_CHANGE_PS); 4026 } 4027 ieee80211_send_nullfunc(local, sdata, false); 4028 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4029 local->pspolling = true; 4030 4031 /* 4032 * Here is assumed that the driver will be 4033 * able to send ps-poll frame and receive a 4034 * response even though power save mode is 4035 * enabled, but some drivers might require 4036 * to disable power save here. This needs 4037 * to be investigated. 4038 */ 4039 ieee80211_send_pspoll(local, sdata); 4040 } 4041 } 4042 4043 if (sdata->vif.p2p || 4044 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4045 struct ieee80211_p2p_noa_attr noa = {}; 4046 int ret; 4047 4048 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 4049 len - baselen, 4050 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4051 (u8 *) &noa, sizeof(noa)); 4052 if (ret >= 2) { 4053 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4054 /* valid noa_attr and index changed */ 4055 sdata->u.mgd.p2p_noa_index = noa.index; 4056 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4057 changed |= BSS_CHANGED_P2P_PS; 4058 /* 4059 * make sure we update all information, the CRC 4060 * mechanism doesn't look at P2P attributes. 4061 */ 4062 ifmgd->beacon_crc_valid = false; 4063 } 4064 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4065 /* noa_attr not found and we had valid noa_attr before */ 4066 sdata->u.mgd.p2p_noa_index = -1; 4067 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4068 changed |= BSS_CHANGED_P2P_PS; 4069 ifmgd->beacon_crc_valid = false; 4070 } 4071 } 4072 4073 if (ifmgd->csa_waiting_bcn) 4074 ieee80211_chswitch_post_beacon(sdata); 4075 4076 /* 4077 * Update beacon timing and dtim count on every beacon appearance. This 4078 * will allow the driver to use the most updated values. Do it before 4079 * comparing this one with last received beacon. 4080 * IMPORTANT: These parameters would possibly be out of sync by the time 4081 * the driver will use them. The synchronized view is currently 4082 * guaranteed only in certain callbacks. 4083 */ 4084 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4085 sdata->vif.bss_conf.sync_tsf = 4086 le64_to_cpu(mgmt->u.beacon.timestamp); 4087 sdata->vif.bss_conf.sync_device_ts = 4088 rx_status->device_timestamp; 4089 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4090 } 4091 4092 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 4093 return; 4094 ifmgd->beacon_crc = ncrc; 4095 ifmgd->beacon_crc_valid = true; 4096 4097 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4098 4099 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4100 rx_status->device_timestamp, 4101 &elems, true); 4102 4103 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4104 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 4105 elems.wmm_param_len, 4106 elems.mu_edca_param_set)) 4107 changed |= BSS_CHANGED_QOS; 4108 4109 /* 4110 * If we haven't had a beacon before, tell the driver about the 4111 * DTIM period (and beacon timing if desired) now. 4112 */ 4113 if (!ifmgd->have_beacon) { 4114 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4115 bss_conf->dtim_period = elems.dtim_period ?: 1; 4116 4117 changed |= BSS_CHANGED_BEACON_INFO; 4118 ifmgd->have_beacon = true; 4119 4120 mutex_lock(&local->iflist_mtx); 4121 ieee80211_recalc_ps(local); 4122 mutex_unlock(&local->iflist_mtx); 4123 4124 ieee80211_recalc_ps_vif(sdata); 4125 } 4126 4127 if (elems.erp_info) { 4128 erp_valid = true; 4129 erp_value = elems.erp_info[0]; 4130 } else { 4131 erp_valid = false; 4132 } 4133 changed |= ieee80211_handle_bss_capability(sdata, 4134 le16_to_cpu(mgmt->u.beacon.capab_info), 4135 erp_valid, erp_value); 4136 4137 mutex_lock(&local->sta_mtx); 4138 sta = sta_info_get(sdata, bssid); 4139 4140 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4141 4142 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem, 4143 elems.vht_cap_elem, elems.ht_operation, 4144 elems.vht_operation, elems.he_operation, 4145 bssid, &changed)) { 4146 mutex_unlock(&local->sta_mtx); 4147 sdata_info(sdata, 4148 "failed to follow AP %pM bandwidth change, disconnect\n", 4149 bssid); 4150 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4151 WLAN_REASON_DEAUTH_LEAVING, 4152 true, deauth_buf); 4153 ieee80211_report_disconnect(sdata, deauth_buf, 4154 sizeof(deauth_buf), true, 4155 WLAN_REASON_DEAUTH_LEAVING); 4156 return; 4157 } 4158 4159 if (sta && elems.opmode_notif) 4160 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4161 rx_status->band); 4162 mutex_unlock(&local->sta_mtx); 4163 4164 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4165 elems.country_elem, 4166 elems.country_elem_len, 4167 elems.pwr_constr_elem, 4168 elems.cisco_dtpc_elem); 4169 4170 ieee80211_bss_info_change_notify(sdata, changed); 4171 } 4172 4173 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4174 struct sk_buff *skb) 4175 { 4176 struct ieee80211_rx_status *rx_status; 4177 struct ieee80211_mgmt *mgmt; 4178 u16 fc; 4179 struct ieee802_11_elems elems; 4180 int ies_len; 4181 4182 rx_status = (struct ieee80211_rx_status *) skb->cb; 4183 mgmt = (struct ieee80211_mgmt *) skb->data; 4184 fc = le16_to_cpu(mgmt->frame_control); 4185 4186 sdata_lock(sdata); 4187 4188 switch (fc & IEEE80211_FCTL_STYPE) { 4189 case IEEE80211_STYPE_BEACON: 4190 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 4191 break; 4192 case IEEE80211_STYPE_PROBE_RESP: 4193 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4194 break; 4195 case IEEE80211_STYPE_AUTH: 4196 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4197 break; 4198 case IEEE80211_STYPE_DEAUTH: 4199 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4200 break; 4201 case IEEE80211_STYPE_DISASSOC: 4202 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4203 break; 4204 case IEEE80211_STYPE_ASSOC_RESP: 4205 case IEEE80211_STYPE_REASSOC_RESP: 4206 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4207 break; 4208 case IEEE80211_STYPE_ACTION: 4209 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4210 ies_len = skb->len - 4211 offsetof(struct ieee80211_mgmt, 4212 u.action.u.chan_switch.variable); 4213 4214 if (ies_len < 0) 4215 break; 4216 4217 /* CSA IE cannot be overridden, no need for BSSID */ 4218 ieee802_11_parse_elems( 4219 mgmt->u.action.u.chan_switch.variable, 4220 ies_len, true, &elems, mgmt->bssid, NULL); 4221 4222 if (elems.parse_error) 4223 break; 4224 4225 ieee80211_sta_process_chanswitch(sdata, 4226 rx_status->mactime, 4227 rx_status->device_timestamp, 4228 &elems, false); 4229 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4230 ies_len = skb->len - 4231 offsetof(struct ieee80211_mgmt, 4232 u.action.u.ext_chan_switch.variable); 4233 4234 if (ies_len < 0) 4235 break; 4236 4237 /* 4238 * extended CSA IE can't be overridden, no need for 4239 * BSSID 4240 */ 4241 ieee802_11_parse_elems( 4242 mgmt->u.action.u.ext_chan_switch.variable, 4243 ies_len, true, &elems, mgmt->bssid, NULL); 4244 4245 if (elems.parse_error) 4246 break; 4247 4248 /* for the handling code pretend this was also an IE */ 4249 elems.ext_chansw_ie = 4250 &mgmt->u.action.u.ext_chan_switch.data; 4251 4252 ieee80211_sta_process_chanswitch(sdata, 4253 rx_status->mactime, 4254 rx_status->device_timestamp, 4255 &elems, false); 4256 } 4257 break; 4258 } 4259 sdata_unlock(sdata); 4260 } 4261 4262 static void ieee80211_sta_timer(struct timer_list *t) 4263 { 4264 struct ieee80211_sub_if_data *sdata = 4265 from_timer(sdata, t, u.mgd.timer); 4266 4267 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4268 } 4269 4270 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4271 u8 *bssid, u8 reason, bool tx) 4272 { 4273 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4274 4275 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4276 tx, frame_buf); 4277 4278 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4279 reason); 4280 } 4281 4282 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4283 { 4284 struct ieee80211_local *local = sdata->local; 4285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4286 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4287 u32 tx_flags = 0; 4288 u16 trans = 1; 4289 u16 status = 0; 4290 u16 prepare_tx_duration = 0; 4291 4292 sdata_assert_lock(sdata); 4293 4294 if (WARN_ON_ONCE(!auth_data)) 4295 return -EINVAL; 4296 4297 auth_data->tries++; 4298 4299 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4300 sdata_info(sdata, "authentication with %pM timed out\n", 4301 auth_data->bss->bssid); 4302 4303 /* 4304 * Most likely AP is not in the range so remove the 4305 * bss struct for that AP. 4306 */ 4307 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4308 4309 return -ETIMEDOUT; 4310 } 4311 4312 if (auth_data->algorithm == WLAN_AUTH_SAE) 4313 prepare_tx_duration = 4314 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4315 4316 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4317 4318 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4319 auth_data->bss->bssid, auth_data->tries, 4320 IEEE80211_AUTH_MAX_TRIES); 4321 4322 auth_data->expected_transaction = 2; 4323 4324 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4325 trans = auth_data->sae_trans; 4326 status = auth_data->sae_status; 4327 auth_data->expected_transaction = trans; 4328 } 4329 4330 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4331 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4332 IEEE80211_TX_INTFL_MLME_CONN_TX; 4333 4334 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4335 auth_data->data, auth_data->data_len, 4336 auth_data->bss->bssid, 4337 auth_data->bss->bssid, NULL, 0, 0, 4338 tx_flags); 4339 4340 if (tx_flags == 0) { 4341 if (auth_data->algorithm == WLAN_AUTH_SAE) 4342 auth_data->timeout = jiffies + 4343 IEEE80211_AUTH_TIMEOUT_SAE; 4344 else 4345 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4346 } else { 4347 auth_data->timeout = 4348 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4349 } 4350 4351 auth_data->timeout_started = true; 4352 run_again(sdata, auth_data->timeout); 4353 4354 return 0; 4355 } 4356 4357 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4358 { 4359 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4360 struct ieee80211_local *local = sdata->local; 4361 4362 sdata_assert_lock(sdata); 4363 4364 assoc_data->tries++; 4365 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4366 sdata_info(sdata, "association with %pM timed out\n", 4367 assoc_data->bss->bssid); 4368 4369 /* 4370 * Most likely AP is not in the range so remove the 4371 * bss struct for that AP. 4372 */ 4373 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4374 4375 return -ETIMEDOUT; 4376 } 4377 4378 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4379 assoc_data->bss->bssid, assoc_data->tries, 4380 IEEE80211_ASSOC_MAX_TRIES); 4381 ieee80211_send_assoc(sdata); 4382 4383 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4384 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4385 assoc_data->timeout_started = true; 4386 run_again(sdata, assoc_data->timeout); 4387 } else { 4388 assoc_data->timeout = 4389 round_jiffies_up(jiffies + 4390 IEEE80211_ASSOC_TIMEOUT_LONG); 4391 assoc_data->timeout_started = true; 4392 run_again(sdata, assoc_data->timeout); 4393 } 4394 4395 return 0; 4396 } 4397 4398 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4399 __le16 fc, bool acked) 4400 { 4401 struct ieee80211_local *local = sdata->local; 4402 4403 sdata->u.mgd.status_fc = fc; 4404 sdata->u.mgd.status_acked = acked; 4405 sdata->u.mgd.status_received = true; 4406 4407 ieee80211_queue_work(&local->hw, &sdata->work); 4408 } 4409 4410 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4411 { 4412 struct ieee80211_local *local = sdata->local; 4413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4414 4415 sdata_lock(sdata); 4416 4417 if (ifmgd->status_received) { 4418 __le16 fc = ifmgd->status_fc; 4419 bool status_acked = ifmgd->status_acked; 4420 4421 ifmgd->status_received = false; 4422 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4423 if (status_acked) { 4424 if (ifmgd->auth_data->algorithm == 4425 WLAN_AUTH_SAE) 4426 ifmgd->auth_data->timeout = 4427 jiffies + 4428 IEEE80211_AUTH_TIMEOUT_SAE; 4429 else 4430 ifmgd->auth_data->timeout = 4431 jiffies + 4432 IEEE80211_AUTH_TIMEOUT_SHORT; 4433 run_again(sdata, ifmgd->auth_data->timeout); 4434 } else { 4435 ifmgd->auth_data->timeout = jiffies - 1; 4436 } 4437 ifmgd->auth_data->timeout_started = true; 4438 } else if (ifmgd->assoc_data && 4439 (ieee80211_is_assoc_req(fc) || 4440 ieee80211_is_reassoc_req(fc))) { 4441 if (status_acked) { 4442 ifmgd->assoc_data->timeout = 4443 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4444 run_again(sdata, ifmgd->assoc_data->timeout); 4445 } else { 4446 ifmgd->assoc_data->timeout = jiffies - 1; 4447 } 4448 ifmgd->assoc_data->timeout_started = true; 4449 } 4450 } 4451 4452 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4453 time_after(jiffies, ifmgd->auth_data->timeout)) { 4454 if (ifmgd->auth_data->done) { 4455 /* 4456 * ok ... we waited for assoc but userspace didn't, 4457 * so let's just kill the auth data 4458 */ 4459 ieee80211_destroy_auth_data(sdata, false); 4460 } else if (ieee80211_auth(sdata)) { 4461 u8 bssid[ETH_ALEN]; 4462 struct ieee80211_event event = { 4463 .type = MLME_EVENT, 4464 .u.mlme.data = AUTH_EVENT, 4465 .u.mlme.status = MLME_TIMEOUT, 4466 }; 4467 4468 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4469 4470 ieee80211_destroy_auth_data(sdata, false); 4471 4472 cfg80211_auth_timeout(sdata->dev, bssid); 4473 drv_event_callback(sdata->local, sdata, &event); 4474 } 4475 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4476 run_again(sdata, ifmgd->auth_data->timeout); 4477 4478 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4479 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4480 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4481 ieee80211_do_assoc(sdata)) { 4482 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4483 struct ieee80211_event event = { 4484 .type = MLME_EVENT, 4485 .u.mlme.data = ASSOC_EVENT, 4486 .u.mlme.status = MLME_TIMEOUT, 4487 }; 4488 4489 ieee80211_destroy_assoc_data(sdata, false, false); 4490 cfg80211_assoc_timeout(sdata->dev, bss); 4491 drv_event_callback(sdata->local, sdata, &event); 4492 } 4493 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4494 run_again(sdata, ifmgd->assoc_data->timeout); 4495 4496 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4497 ifmgd->associated) { 4498 u8 bssid[ETH_ALEN]; 4499 int max_tries; 4500 4501 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4502 4503 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4504 max_tries = max_nullfunc_tries; 4505 else 4506 max_tries = max_probe_tries; 4507 4508 /* ACK received for nullfunc probing frame */ 4509 if (!ifmgd->probe_send_count) 4510 ieee80211_reset_ap_probe(sdata); 4511 else if (ifmgd->nullfunc_failed) { 4512 if (ifmgd->probe_send_count < max_tries) { 4513 mlme_dbg(sdata, 4514 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4515 bssid, ifmgd->probe_send_count, 4516 max_tries); 4517 ieee80211_mgd_probe_ap_send(sdata); 4518 } else { 4519 mlme_dbg(sdata, 4520 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4521 bssid); 4522 ieee80211_sta_connection_lost(sdata, bssid, 4523 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4524 false); 4525 } 4526 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4527 run_again(sdata, ifmgd->probe_timeout); 4528 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4529 mlme_dbg(sdata, 4530 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4531 bssid, probe_wait_ms); 4532 ieee80211_sta_connection_lost(sdata, bssid, 4533 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4534 } else if (ifmgd->probe_send_count < max_tries) { 4535 mlme_dbg(sdata, 4536 "No probe response from AP %pM after %dms, try %d/%i\n", 4537 bssid, probe_wait_ms, 4538 ifmgd->probe_send_count, max_tries); 4539 ieee80211_mgd_probe_ap_send(sdata); 4540 } else { 4541 /* 4542 * We actually lost the connection ... or did we? 4543 * Let's make sure! 4544 */ 4545 mlme_dbg(sdata, 4546 "No probe response from AP %pM after %dms, disconnecting.\n", 4547 bssid, probe_wait_ms); 4548 4549 ieee80211_sta_connection_lost(sdata, bssid, 4550 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4551 } 4552 } 4553 4554 sdata_unlock(sdata); 4555 } 4556 4557 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4558 { 4559 struct ieee80211_sub_if_data *sdata = 4560 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4562 4563 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4564 return; 4565 4566 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4567 return; 4568 4569 sdata->u.mgd.connection_loss = false; 4570 ieee80211_queue_work(&sdata->local->hw, 4571 &sdata->u.mgd.beacon_connection_loss_work); 4572 } 4573 4574 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4575 { 4576 struct ieee80211_sub_if_data *sdata = 4577 from_timer(sdata, t, u.mgd.conn_mon_timer); 4578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4579 struct ieee80211_local *local = sdata->local; 4580 4581 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4582 return; 4583 4584 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4585 } 4586 4587 static void ieee80211_sta_monitor_work(struct work_struct *work) 4588 { 4589 struct ieee80211_sub_if_data *sdata = 4590 container_of(work, struct ieee80211_sub_if_data, 4591 u.mgd.monitor_work); 4592 4593 ieee80211_mgd_probe_ap(sdata, false); 4594 } 4595 4596 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4597 { 4598 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4599 __ieee80211_stop_poll(sdata); 4600 4601 /* let's probe the connection once */ 4602 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4603 ieee80211_queue_work(&sdata->local->hw, 4604 &sdata->u.mgd.monitor_work); 4605 } 4606 } 4607 4608 #ifdef CONFIG_PM 4609 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4610 { 4611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4612 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4613 4614 sdata_lock(sdata); 4615 4616 if (ifmgd->auth_data || ifmgd->assoc_data) { 4617 const u8 *bssid = ifmgd->auth_data ? 4618 ifmgd->auth_data->bss->bssid : 4619 ifmgd->assoc_data->bss->bssid; 4620 4621 /* 4622 * If we are trying to authenticate / associate while suspending, 4623 * cfg80211 won't know and won't actually abort those attempts, 4624 * thus we need to do that ourselves. 4625 */ 4626 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4627 IEEE80211_STYPE_DEAUTH, 4628 WLAN_REASON_DEAUTH_LEAVING, 4629 false, frame_buf); 4630 if (ifmgd->assoc_data) 4631 ieee80211_destroy_assoc_data(sdata, false, true); 4632 if (ifmgd->auth_data) 4633 ieee80211_destroy_auth_data(sdata, false); 4634 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4635 IEEE80211_DEAUTH_FRAME_LEN); 4636 } 4637 4638 /* This is a bit of a hack - we should find a better and more generic 4639 * solution to this. Normally when suspending, cfg80211 will in fact 4640 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4641 * auth (not so important) or assoc (this is the problem) process. 4642 * 4643 * As a consequence, it can happen that we are in the process of both 4644 * associating and suspending, and receive an association response 4645 * after cfg80211 has checked if it needs to disconnect, but before 4646 * we actually set the flag to drop incoming frames. This will then 4647 * cause the workqueue flush to process the association response in 4648 * the suspend, resulting in a successful association just before it 4649 * tries to remove the interface from the driver, which now though 4650 * has a channel context assigned ... this results in issues. 4651 * 4652 * To work around this (for now) simply deauth here again if we're 4653 * now connected. 4654 */ 4655 if (ifmgd->associated && !sdata->local->wowlan) { 4656 u8 bssid[ETH_ALEN]; 4657 struct cfg80211_deauth_request req = { 4658 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4659 .bssid = bssid, 4660 }; 4661 4662 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4663 ieee80211_mgd_deauth(sdata, &req); 4664 } 4665 4666 sdata_unlock(sdata); 4667 } 4668 4669 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4670 { 4671 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4672 4673 sdata_lock(sdata); 4674 if (!ifmgd->associated) { 4675 sdata_unlock(sdata); 4676 return; 4677 } 4678 4679 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4680 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4681 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4682 ieee80211_sta_connection_lost(sdata, 4683 ifmgd->associated->bssid, 4684 WLAN_REASON_UNSPECIFIED, 4685 true); 4686 sdata_unlock(sdata); 4687 return; 4688 } 4689 sdata_unlock(sdata); 4690 } 4691 #endif 4692 4693 /* interface setup */ 4694 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4695 { 4696 struct ieee80211_if_managed *ifmgd; 4697 4698 ifmgd = &sdata->u.mgd; 4699 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4700 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4701 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4702 ieee80211_beacon_connection_loss_work); 4703 INIT_WORK(&ifmgd->csa_connection_drop_work, 4704 ieee80211_csa_connection_drop_work); 4705 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4706 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4707 ieee80211_tdls_peer_del_work); 4708 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4709 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4710 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4711 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4712 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4713 ieee80211_sta_handle_tspec_ac_params_wk); 4714 4715 ifmgd->flags = 0; 4716 ifmgd->powersave = sdata->wdev.ps; 4717 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4718 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4719 ifmgd->p2p_noa_index = -1; 4720 4721 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4722 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4723 else 4724 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4725 4726 /* Setup TDLS data */ 4727 spin_lock_init(&ifmgd->teardown_lock); 4728 ifmgd->teardown_skb = NULL; 4729 ifmgd->orig_teardown_skb = NULL; 4730 } 4731 4732 /* scan finished notification */ 4733 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4734 { 4735 struct ieee80211_sub_if_data *sdata; 4736 4737 /* Restart STA timers */ 4738 rcu_read_lock(); 4739 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4740 if (ieee80211_sdata_running(sdata)) 4741 ieee80211_restart_sta_timer(sdata); 4742 } 4743 rcu_read_unlock(); 4744 } 4745 4746 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4747 struct cfg80211_bss *cbss) 4748 { 4749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4750 const u8 *ht_cap_ie, *vht_cap_ie; 4751 const struct ieee80211_ht_cap *ht_cap; 4752 const struct ieee80211_vht_cap *vht_cap; 4753 u8 chains = 1; 4754 4755 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4756 return chains; 4757 4758 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4759 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4760 ht_cap = (void *)(ht_cap_ie + 2); 4761 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4762 /* 4763 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4764 * "Tx Unequal Modulation Supported" fields. 4765 */ 4766 } 4767 4768 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4769 return chains; 4770 4771 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4772 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4773 u8 nss; 4774 u16 tx_mcs_map; 4775 4776 vht_cap = (void *)(vht_cap_ie + 2); 4777 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4778 for (nss = 8; nss > 0; nss--) { 4779 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4780 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4781 break; 4782 } 4783 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4784 chains = max(chains, nss); 4785 } 4786 4787 return chains; 4788 } 4789 4790 static bool 4791 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4792 const struct ieee80211_he_operation *he_op) 4793 { 4794 const struct ieee80211_sta_he_cap *sta_he_cap = 4795 ieee80211_get_he_sta_cap(sband); 4796 u16 ap_min_req_set; 4797 int i; 4798 4799 if (!sta_he_cap || !he_op) 4800 return false; 4801 4802 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4803 4804 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4805 for (i = 0; i < 3; i++) { 4806 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4807 &sta_he_cap->he_mcs_nss_supp; 4808 u16 sta_mcs_map_rx = 4809 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4810 u16 sta_mcs_map_tx = 4811 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4812 u8 nss; 4813 bool verified = true; 4814 4815 /* 4816 * For each band there is a maximum of 8 spatial streams 4817 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4818 * of 2 bits per NSS (1-8), with the values defined in enum 4819 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4820 * capabilities aren't less than the AP's minimum requirements 4821 * for this HE BSS per SS. 4822 * It is enough to find one such band that meets the reqs. 4823 */ 4824 for (nss = 8; nss > 0; nss--) { 4825 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4826 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4827 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4828 4829 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4830 continue; 4831 4832 /* 4833 * Make sure the HE AP doesn't require MCSs that aren't 4834 * supported by the client 4835 */ 4836 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4837 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4838 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4839 verified = false; 4840 break; 4841 } 4842 } 4843 4844 if (verified) 4845 return true; 4846 } 4847 4848 /* If here, STA doesn't meet AP's HE min requirements */ 4849 return false; 4850 } 4851 4852 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4853 struct cfg80211_bss *cbss) 4854 { 4855 struct ieee80211_local *local = sdata->local; 4856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4857 const struct ieee80211_ht_cap *ht_cap = NULL; 4858 const struct ieee80211_ht_operation *ht_oper = NULL; 4859 const struct ieee80211_vht_operation *vht_oper = NULL; 4860 const struct ieee80211_he_operation *he_oper = NULL; 4861 struct ieee80211_supported_band *sband; 4862 struct cfg80211_chan_def chandef; 4863 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4864 struct ieee80211_bss *bss = (void *)cbss->priv; 4865 int ret; 4866 u32 i; 4867 bool have_80mhz; 4868 4869 sband = local->hw.wiphy->bands[cbss->channel->band]; 4870 4871 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4872 IEEE80211_STA_DISABLE_80P80MHZ | 4873 IEEE80211_STA_DISABLE_160MHZ); 4874 4875 /* disable HT/VHT/HE if we don't support them */ 4876 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4877 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4878 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4879 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4880 } 4881 4882 if (!sband->vht_cap.vht_supported && !is_6ghz) { 4883 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4884 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4885 } 4886 4887 if (!ieee80211_get_he_sta_cap(sband)) 4888 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4889 4890 rcu_read_lock(); 4891 4892 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 4893 const u8 *ht_oper_ie, *ht_cap_ie; 4894 4895 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4896 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4897 ht_oper = (void *)(ht_oper_ie + 2); 4898 4899 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4900 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4901 ht_cap = (void *)(ht_cap_ie + 2); 4902 4903 if (!ht_cap) { 4904 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4905 ht_oper = NULL; 4906 } 4907 } 4908 4909 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 4910 const u8 *vht_oper_ie, *vht_cap; 4911 4912 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4913 WLAN_EID_VHT_OPERATION); 4914 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4915 vht_oper = (void *)(vht_oper_ie + 2); 4916 if (vht_oper && !ht_oper) { 4917 vht_oper = NULL; 4918 sdata_info(sdata, 4919 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4920 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4921 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4922 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4923 } 4924 4925 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4926 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4927 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4928 vht_oper = NULL; 4929 } 4930 } 4931 4932 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 4933 const struct cfg80211_bss_ies *ies; 4934 const u8 *he_oper_ie; 4935 4936 ies = rcu_dereference(cbss->ies); 4937 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4938 ies->data, ies->len); 4939 if (he_oper_ie && 4940 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4941 he_oper = (void *)(he_oper_ie + 3); 4942 else 4943 he_oper = NULL; 4944 4945 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4946 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4947 } 4948 4949 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4950 have_80mhz = false; 4951 for (i = 0; i < sband->n_channels; i++) { 4952 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4953 IEEE80211_CHAN_NO_80MHZ)) 4954 continue; 4955 4956 have_80mhz = true; 4957 break; 4958 } 4959 4960 if (!have_80mhz) 4961 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4962 4963 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4964 cbss->channel, 4965 bss->vht_cap_info, 4966 ht_oper, vht_oper, he_oper, 4967 &chandef, false); 4968 4969 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4970 local->rx_chains); 4971 4972 rcu_read_unlock(); 4973 4974 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 4975 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4976 return -EINVAL; 4977 } 4978 4979 /* will change later if needed */ 4980 sdata->smps_mode = IEEE80211_SMPS_OFF; 4981 4982 mutex_lock(&local->mtx); 4983 /* 4984 * If this fails (possibly due to channel context sharing 4985 * on incompatible channels, e.g. 80+80 and 160 sharing the 4986 * same control channel) try to use a smaller bandwidth. 4987 */ 4988 ret = ieee80211_vif_use_channel(sdata, &chandef, 4989 IEEE80211_CHANCTX_SHARED); 4990 4991 /* don't downgrade for 5 and 10 MHz channels, though. */ 4992 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4993 chandef.width == NL80211_CHAN_WIDTH_10) 4994 goto out; 4995 4996 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4997 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4998 ret = ieee80211_vif_use_channel(sdata, &chandef, 4999 IEEE80211_CHANCTX_SHARED); 5000 } 5001 out: 5002 mutex_unlock(&local->mtx); 5003 return ret; 5004 } 5005 5006 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5007 u8 *dtim_count, u8 *dtim_period) 5008 { 5009 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5010 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5011 ies->len); 5012 const struct ieee80211_tim_ie *tim = NULL; 5013 const struct ieee80211_bssid_index *idx; 5014 bool valid = tim_ie && tim_ie[1] >= 2; 5015 5016 if (valid) 5017 tim = (void *)(tim_ie + 2); 5018 5019 if (dtim_count) 5020 *dtim_count = valid ? tim->dtim_count : 0; 5021 5022 if (dtim_period) 5023 *dtim_period = valid ? tim->dtim_period : 0; 5024 5025 /* Check if value is overridden by non-transmitted profile */ 5026 if (!idx_ie || idx_ie[1] < 3) 5027 return valid; 5028 5029 idx = (void *)(idx_ie + 2); 5030 5031 if (dtim_count) 5032 *dtim_count = idx->dtim_count; 5033 5034 if (dtim_period) 5035 *dtim_period = idx->dtim_period; 5036 5037 return true; 5038 } 5039 5040 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5041 struct cfg80211_bss *cbss, bool assoc, 5042 bool override) 5043 { 5044 struct ieee80211_local *local = sdata->local; 5045 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5046 struct ieee80211_bss *bss = (void *)cbss->priv; 5047 struct sta_info *new_sta = NULL; 5048 struct ieee80211_supported_band *sband; 5049 bool have_sta = false; 5050 int err; 5051 5052 sband = local->hw.wiphy->bands[cbss->channel->band]; 5053 5054 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5055 return -EINVAL; 5056 5057 /* If a reconfig is happening, bail out */ 5058 if (local->in_reconfig) 5059 return -EBUSY; 5060 5061 if (assoc) { 5062 rcu_read_lock(); 5063 have_sta = sta_info_get(sdata, cbss->bssid); 5064 rcu_read_unlock(); 5065 } 5066 5067 if (!have_sta) { 5068 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5069 if (!new_sta) 5070 return -ENOMEM; 5071 } 5072 5073 /* 5074 * Set up the information for the new channel before setting the 5075 * new channel. We can't - completely race-free - change the basic 5076 * rates bitmap and the channel (sband) that it refers to, but if 5077 * we set it up before we at least avoid calling into the driver's 5078 * bss_info_changed() method with invalid information (since we do 5079 * call that from changing the channel - only for IDLE and perhaps 5080 * some others, but ...). 5081 * 5082 * So to avoid that, just set up all the new information before the 5083 * channel, but tell the driver to apply it only afterwards, since 5084 * it might need the new channel for that. 5085 */ 5086 if (new_sta) { 5087 u32 rates = 0, basic_rates = 0; 5088 bool have_higher_than_11mbit; 5089 int min_rate = INT_MAX, min_rate_index = -1; 5090 const struct cfg80211_bss_ies *ies; 5091 int shift = ieee80211_vif_get_shift(&sdata->vif); 5092 5093 ieee80211_get_rates(sband, bss->supp_rates, 5094 bss->supp_rates_len, 5095 &rates, &basic_rates, 5096 &have_higher_than_11mbit, 5097 &min_rate, &min_rate_index, 5098 shift); 5099 5100 /* 5101 * This used to be a workaround for basic rates missing 5102 * in the association response frame. Now that we no 5103 * longer use the basic rates from there, it probably 5104 * doesn't happen any more, but keep the workaround so 5105 * in case some *other* APs are buggy in different ways 5106 * we can connect -- with a warning. 5107 * Allow this workaround only in case the AP provided at least 5108 * one rate. 5109 */ 5110 if (min_rate_index < 0) { 5111 sdata_info(sdata, 5112 "No legacy rates in association response\n"); 5113 5114 sta_info_free(local, new_sta); 5115 return -EINVAL; 5116 } else if (!basic_rates) { 5117 sdata_info(sdata, 5118 "No basic rates, using min rate instead\n"); 5119 basic_rates = BIT(min_rate_index); 5120 } 5121 5122 if (rates) 5123 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5124 else 5125 sdata_info(sdata, 5126 "No rates found, keeping mandatory only\n"); 5127 5128 sdata->vif.bss_conf.basic_rates = basic_rates; 5129 5130 /* cf. IEEE 802.11 9.2.12 */ 5131 if (cbss->channel->band == NL80211_BAND_2GHZ && 5132 have_higher_than_11mbit) 5133 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5134 else 5135 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5136 5137 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5138 5139 /* set timing information */ 5140 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5141 rcu_read_lock(); 5142 ies = rcu_dereference(cbss->beacon_ies); 5143 if (ies) { 5144 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5145 sdata->vif.bss_conf.sync_device_ts = 5146 bss->device_ts_beacon; 5147 5148 ieee80211_get_dtim(ies, 5149 &sdata->vif.bss_conf.sync_dtim_count, 5150 NULL); 5151 } else if (!ieee80211_hw_check(&sdata->local->hw, 5152 TIMING_BEACON_ONLY)) { 5153 ies = rcu_dereference(cbss->proberesp_ies); 5154 /* must be non-NULL since beacon IEs were NULL */ 5155 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5156 sdata->vif.bss_conf.sync_device_ts = 5157 bss->device_ts_presp; 5158 sdata->vif.bss_conf.sync_dtim_count = 0; 5159 } else { 5160 sdata->vif.bss_conf.sync_tsf = 0; 5161 sdata->vif.bss_conf.sync_device_ts = 0; 5162 sdata->vif.bss_conf.sync_dtim_count = 0; 5163 } 5164 rcu_read_unlock(); 5165 } 5166 5167 if (new_sta || override) { 5168 err = ieee80211_prep_channel(sdata, cbss); 5169 if (err) { 5170 if (new_sta) 5171 sta_info_free(local, new_sta); 5172 return -EINVAL; 5173 } 5174 } 5175 5176 if (new_sta) { 5177 /* 5178 * tell driver about BSSID, basic rates and timing 5179 * this was set up above, before setting the channel 5180 */ 5181 ieee80211_bss_info_change_notify(sdata, 5182 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5183 BSS_CHANGED_BEACON_INT); 5184 5185 if (assoc) 5186 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5187 5188 err = sta_info_insert(new_sta); 5189 new_sta = NULL; 5190 if (err) { 5191 sdata_info(sdata, 5192 "failed to insert STA entry for the AP (error %d)\n", 5193 err); 5194 return err; 5195 } 5196 } else 5197 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5198 5199 /* Cancel scan to ensure that nothing interferes with connection */ 5200 if (local->scanning) 5201 ieee80211_scan_cancel(local); 5202 5203 return 0; 5204 } 5205 5206 /* config hooks */ 5207 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5208 struct cfg80211_auth_request *req) 5209 { 5210 struct ieee80211_local *local = sdata->local; 5211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5212 struct ieee80211_mgd_auth_data *auth_data; 5213 u16 auth_alg; 5214 int err; 5215 bool cont_auth; 5216 5217 /* prepare auth data structure */ 5218 5219 switch (req->auth_type) { 5220 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5221 auth_alg = WLAN_AUTH_OPEN; 5222 break; 5223 case NL80211_AUTHTYPE_SHARED_KEY: 5224 if (fips_enabled) 5225 return -EOPNOTSUPP; 5226 auth_alg = WLAN_AUTH_SHARED_KEY; 5227 break; 5228 case NL80211_AUTHTYPE_FT: 5229 auth_alg = WLAN_AUTH_FT; 5230 break; 5231 case NL80211_AUTHTYPE_NETWORK_EAP: 5232 auth_alg = WLAN_AUTH_LEAP; 5233 break; 5234 case NL80211_AUTHTYPE_SAE: 5235 auth_alg = WLAN_AUTH_SAE; 5236 break; 5237 case NL80211_AUTHTYPE_FILS_SK: 5238 auth_alg = WLAN_AUTH_FILS_SK; 5239 break; 5240 case NL80211_AUTHTYPE_FILS_SK_PFS: 5241 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5242 break; 5243 case NL80211_AUTHTYPE_FILS_PK: 5244 auth_alg = WLAN_AUTH_FILS_PK; 5245 break; 5246 default: 5247 return -EOPNOTSUPP; 5248 } 5249 5250 if (ifmgd->assoc_data) 5251 return -EBUSY; 5252 5253 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5254 req->ie_len, GFP_KERNEL); 5255 if (!auth_data) 5256 return -ENOMEM; 5257 5258 auth_data->bss = req->bss; 5259 5260 if (req->auth_data_len >= 4) { 5261 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5262 __le16 *pos = (__le16 *) req->auth_data; 5263 5264 auth_data->sae_trans = le16_to_cpu(pos[0]); 5265 auth_data->sae_status = le16_to_cpu(pos[1]); 5266 } 5267 memcpy(auth_data->data, req->auth_data + 4, 5268 req->auth_data_len - 4); 5269 auth_data->data_len += req->auth_data_len - 4; 5270 } 5271 5272 /* Check if continuing authentication or trying to authenticate with the 5273 * same BSS that we were in the process of authenticating with and avoid 5274 * removal and re-addition of the STA entry in 5275 * ieee80211_prep_connection(). 5276 */ 5277 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5278 5279 if (req->ie && req->ie_len) { 5280 memcpy(&auth_data->data[auth_data->data_len], 5281 req->ie, req->ie_len); 5282 auth_data->data_len += req->ie_len; 5283 } 5284 5285 if (req->key && req->key_len) { 5286 auth_data->key_len = req->key_len; 5287 auth_data->key_idx = req->key_idx; 5288 memcpy(auth_data->key, req->key, req->key_len); 5289 } 5290 5291 auth_data->algorithm = auth_alg; 5292 5293 /* try to authenticate/probe */ 5294 5295 if (ifmgd->auth_data) { 5296 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5297 auth_data->peer_confirmed = 5298 ifmgd->auth_data->peer_confirmed; 5299 } 5300 ieee80211_destroy_auth_data(sdata, cont_auth); 5301 } 5302 5303 /* prep auth_data so we don't go into idle on disassoc */ 5304 ifmgd->auth_data = auth_data; 5305 5306 /* If this is continuation of an ongoing SAE authentication exchange 5307 * (i.e., request to send SAE Confirm) and the peer has already 5308 * confirmed, mark authentication completed since we are about to send 5309 * out SAE Confirm. 5310 */ 5311 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5312 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5313 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5314 5315 if (ifmgd->associated) { 5316 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5317 5318 sdata_info(sdata, 5319 "disconnect from AP %pM for new auth to %pM\n", 5320 ifmgd->associated->bssid, req->bss->bssid); 5321 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5322 WLAN_REASON_UNSPECIFIED, 5323 false, frame_buf); 5324 5325 ieee80211_report_disconnect(sdata, frame_buf, 5326 sizeof(frame_buf), true, 5327 WLAN_REASON_UNSPECIFIED); 5328 } 5329 5330 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5331 5332 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5333 if (err) 5334 goto err_clear; 5335 5336 err = ieee80211_auth(sdata); 5337 if (err) { 5338 sta_info_destroy_addr(sdata, req->bss->bssid); 5339 goto err_clear; 5340 } 5341 5342 /* hold our own reference */ 5343 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5344 return 0; 5345 5346 err_clear: 5347 eth_zero_addr(ifmgd->bssid); 5348 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5349 ifmgd->auth_data = NULL; 5350 mutex_lock(&sdata->local->mtx); 5351 ieee80211_vif_release_channel(sdata); 5352 mutex_unlock(&sdata->local->mtx); 5353 kfree(auth_data); 5354 return err; 5355 } 5356 5357 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5358 struct cfg80211_assoc_request *req) 5359 { 5360 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5361 struct ieee80211_local *local = sdata->local; 5362 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5363 struct ieee80211_bss *bss = (void *)req->bss->priv; 5364 struct ieee80211_mgd_assoc_data *assoc_data; 5365 const struct cfg80211_bss_ies *beacon_ies; 5366 struct ieee80211_supported_band *sband; 5367 const u8 *ssidie, *ht_ie, *vht_ie; 5368 int i, err; 5369 bool override = false; 5370 5371 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5372 if (!assoc_data) 5373 return -ENOMEM; 5374 5375 rcu_read_lock(); 5376 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5377 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5378 rcu_read_unlock(); 5379 kfree(assoc_data); 5380 return -EINVAL; 5381 } 5382 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5383 assoc_data->ssid_len = ssidie[1]; 5384 rcu_read_unlock(); 5385 5386 if (ifmgd->associated) { 5387 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5388 5389 sdata_info(sdata, 5390 "disconnect from AP %pM for new assoc to %pM\n", 5391 ifmgd->associated->bssid, req->bss->bssid); 5392 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5393 WLAN_REASON_UNSPECIFIED, 5394 false, frame_buf); 5395 5396 ieee80211_report_disconnect(sdata, frame_buf, 5397 sizeof(frame_buf), true, 5398 WLAN_REASON_UNSPECIFIED); 5399 } 5400 5401 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5402 err = -EBUSY; 5403 goto err_free; 5404 } 5405 5406 if (ifmgd->assoc_data) { 5407 err = -EBUSY; 5408 goto err_free; 5409 } 5410 5411 if (ifmgd->auth_data) { 5412 bool match; 5413 5414 /* keep sta info, bssid if matching */ 5415 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5416 ieee80211_destroy_auth_data(sdata, match); 5417 } 5418 5419 /* prepare assoc data */ 5420 5421 ifmgd->beacon_crc_valid = false; 5422 5423 assoc_data->wmm = bss->wmm_used && 5424 (local->hw.queues >= IEEE80211_NUM_ACS); 5425 5426 /* 5427 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5428 * We still associate in non-HT mode (11a/b/g) if any one of these 5429 * ciphers is configured as pairwise. 5430 * We can set this to true for non-11n hardware, that'll be checked 5431 * separately along with the peer capabilities. 5432 */ 5433 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5434 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5435 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5436 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5437 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5438 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5439 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5440 netdev_info(sdata->dev, 5441 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5442 } 5443 } 5444 5445 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5446 5447 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5448 if (!bss->wmm_used) { 5449 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5450 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5451 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5452 netdev_info(sdata->dev, 5453 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5454 } 5455 5456 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5457 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5458 sizeof(ifmgd->ht_capa_mask)); 5459 5460 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5461 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5462 sizeof(ifmgd->vht_capa_mask)); 5463 5464 if (req->ie && req->ie_len) { 5465 memcpy(assoc_data->ie, req->ie, req->ie_len); 5466 assoc_data->ie_len = req->ie_len; 5467 } 5468 5469 if (req->fils_kek) { 5470 /* should already be checked in cfg80211 - so warn */ 5471 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5472 err = -EINVAL; 5473 goto err_free; 5474 } 5475 memcpy(assoc_data->fils_kek, req->fils_kek, 5476 req->fils_kek_len); 5477 assoc_data->fils_kek_len = req->fils_kek_len; 5478 } 5479 5480 if (req->fils_nonces) 5481 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5482 2 * FILS_NONCE_LEN); 5483 5484 assoc_data->bss = req->bss; 5485 5486 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5487 if (ifmgd->powersave) 5488 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5489 else 5490 sdata->smps_mode = IEEE80211_SMPS_OFF; 5491 } else 5492 sdata->smps_mode = ifmgd->req_smps; 5493 5494 assoc_data->capability = req->bss->capability; 5495 assoc_data->supp_rates = bss->supp_rates; 5496 assoc_data->supp_rates_len = bss->supp_rates_len; 5497 5498 rcu_read_lock(); 5499 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5500 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5501 assoc_data->ap_ht_param = 5502 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5503 else if (!is_6ghz) 5504 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5505 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5506 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5507 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5508 sizeof(struct ieee80211_vht_cap)); 5509 else if (!is_6ghz) 5510 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5511 IEEE80211_STA_DISABLE_HE; 5512 rcu_read_unlock(); 5513 5514 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5515 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5516 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5517 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5518 5519 if (bss->wmm_used && bss->uapsd_supported && 5520 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5521 assoc_data->uapsd = true; 5522 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5523 } else { 5524 assoc_data->uapsd = false; 5525 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5526 } 5527 5528 if (req->prev_bssid) 5529 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5530 5531 if (req->use_mfp) { 5532 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5533 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5534 } else { 5535 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5536 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5537 } 5538 5539 if (req->flags & ASSOC_REQ_USE_RRM) 5540 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5541 else 5542 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5543 5544 if (req->crypto.control_port) 5545 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5546 else 5547 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5548 5549 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5550 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5551 sdata->control_port_over_nl80211 = 5552 req->crypto.control_port_over_nl80211; 5553 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5554 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5555 sdata->vif.type); 5556 5557 /* kick off associate process */ 5558 5559 ifmgd->assoc_data = assoc_data; 5560 ifmgd->dtim_period = 0; 5561 ifmgd->have_beacon = false; 5562 5563 /* override HT/VHT configuration only if the AP and we support it */ 5564 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5565 struct ieee80211_sta_ht_cap sta_ht_cap; 5566 5567 if (req->flags & ASSOC_REQ_DISABLE_HT) 5568 override = true; 5569 5570 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5571 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5572 5573 /* check for 40 MHz disable override */ 5574 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5575 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5576 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5577 override = true; 5578 5579 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5580 req->flags & ASSOC_REQ_DISABLE_VHT) 5581 override = true; 5582 } 5583 5584 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5585 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5586 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5587 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5588 } 5589 5590 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5591 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5592 5593 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5594 if (err) 5595 goto err_clear; 5596 5597 rcu_read_lock(); 5598 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5599 5600 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5601 !beacon_ies) { 5602 /* 5603 * Wait up to one beacon interval ... 5604 * should this be more if we miss one? 5605 */ 5606 sdata_info(sdata, "waiting for beacon from %pM\n", 5607 ifmgd->bssid); 5608 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5609 assoc_data->timeout_started = true; 5610 assoc_data->need_beacon = true; 5611 } else if (beacon_ies) { 5612 const struct element *elem; 5613 u8 dtim_count = 0; 5614 5615 ieee80211_get_dtim(beacon_ies, &dtim_count, 5616 &ifmgd->dtim_period); 5617 5618 ifmgd->have_beacon = true; 5619 assoc_data->timeout = jiffies; 5620 assoc_data->timeout_started = true; 5621 5622 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5623 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5624 sdata->vif.bss_conf.sync_device_ts = 5625 bss->device_ts_beacon; 5626 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5627 } 5628 5629 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5630 beacon_ies->data, beacon_ies->len); 5631 if (elem && elem->datalen >= 3) 5632 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5633 5634 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5635 beacon_ies->data, beacon_ies->len); 5636 if (elem && elem->datalen >= 11 && 5637 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5638 sdata->vif.bss_conf.ema_ap = true; 5639 } else { 5640 assoc_data->timeout = jiffies; 5641 assoc_data->timeout_started = true; 5642 } 5643 rcu_read_unlock(); 5644 5645 run_again(sdata, assoc_data->timeout); 5646 5647 if (bss->corrupt_data) { 5648 char *corrupt_type = "data"; 5649 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5650 if (bss->corrupt_data & 5651 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5652 corrupt_type = "beacon and probe response"; 5653 else 5654 corrupt_type = "beacon"; 5655 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5656 corrupt_type = "probe response"; 5657 sdata_info(sdata, "associating with AP with corrupt %s\n", 5658 corrupt_type); 5659 } 5660 5661 return 0; 5662 err_clear: 5663 eth_zero_addr(ifmgd->bssid); 5664 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5665 ifmgd->assoc_data = NULL; 5666 err_free: 5667 kfree(assoc_data); 5668 return err; 5669 } 5670 5671 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5672 struct cfg80211_deauth_request *req) 5673 { 5674 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5675 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5676 bool tx = !req->local_state_change; 5677 5678 if (ifmgd->auth_data && 5679 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5680 sdata_info(sdata, 5681 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5682 req->bssid, req->reason_code, 5683 ieee80211_get_reason_code_string(req->reason_code)); 5684 5685 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5686 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5687 IEEE80211_STYPE_DEAUTH, 5688 req->reason_code, tx, 5689 frame_buf); 5690 ieee80211_destroy_auth_data(sdata, false); 5691 ieee80211_report_disconnect(sdata, frame_buf, 5692 sizeof(frame_buf), true, 5693 req->reason_code); 5694 5695 return 0; 5696 } 5697 5698 if (ifmgd->assoc_data && 5699 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5700 sdata_info(sdata, 5701 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5702 req->bssid, req->reason_code, 5703 ieee80211_get_reason_code_string(req->reason_code)); 5704 5705 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5706 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5707 IEEE80211_STYPE_DEAUTH, 5708 req->reason_code, tx, 5709 frame_buf); 5710 ieee80211_destroy_assoc_data(sdata, false, true); 5711 ieee80211_report_disconnect(sdata, frame_buf, 5712 sizeof(frame_buf), true, 5713 req->reason_code); 5714 return 0; 5715 } 5716 5717 if (ifmgd->associated && 5718 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5719 sdata_info(sdata, 5720 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5721 req->bssid, req->reason_code, 5722 ieee80211_get_reason_code_string(req->reason_code)); 5723 5724 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5725 req->reason_code, tx, frame_buf); 5726 ieee80211_report_disconnect(sdata, frame_buf, 5727 sizeof(frame_buf), true, 5728 req->reason_code); 5729 return 0; 5730 } 5731 5732 return -ENOTCONN; 5733 } 5734 5735 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5736 struct cfg80211_disassoc_request *req) 5737 { 5738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5739 u8 bssid[ETH_ALEN]; 5740 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5741 5742 /* 5743 * cfg80211 should catch this ... but it's racy since 5744 * we can receive a disassoc frame, process it, hand it 5745 * to cfg80211 while that's in a locked section already 5746 * trying to tell us that the user wants to disconnect. 5747 */ 5748 if (ifmgd->associated != req->bss) 5749 return -ENOLINK; 5750 5751 sdata_info(sdata, 5752 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5753 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5754 5755 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5756 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5757 req->reason_code, !req->local_state_change, 5758 frame_buf); 5759 5760 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5761 req->reason_code); 5762 5763 return 0; 5764 } 5765 5766 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5767 { 5768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5769 5770 /* 5771 * Make sure some work items will not run after this, 5772 * they will not do anything but might not have been 5773 * cancelled when disconnecting. 5774 */ 5775 cancel_work_sync(&ifmgd->monitor_work); 5776 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5777 cancel_work_sync(&ifmgd->request_smps_work); 5778 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5779 cancel_work_sync(&ifmgd->chswitch_work); 5780 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5781 5782 sdata_lock(sdata); 5783 if (ifmgd->assoc_data) { 5784 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5785 ieee80211_destroy_assoc_data(sdata, false, false); 5786 cfg80211_assoc_timeout(sdata->dev, bss); 5787 } 5788 if (ifmgd->auth_data) 5789 ieee80211_destroy_auth_data(sdata, false); 5790 spin_lock_bh(&ifmgd->teardown_lock); 5791 if (ifmgd->teardown_skb) { 5792 kfree_skb(ifmgd->teardown_skb); 5793 ifmgd->teardown_skb = NULL; 5794 ifmgd->orig_teardown_skb = NULL; 5795 } 5796 kfree(ifmgd->assoc_req_ies); 5797 ifmgd->assoc_req_ies = NULL; 5798 ifmgd->assoc_req_ies_len = 0; 5799 spin_unlock_bh(&ifmgd->teardown_lock); 5800 del_timer_sync(&ifmgd->timer); 5801 sdata_unlock(sdata); 5802 } 5803 5804 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5805 enum nl80211_cqm_rssi_threshold_event rssi_event, 5806 s32 rssi_level, 5807 gfp_t gfp) 5808 { 5809 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5810 5811 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5812 5813 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5814 } 5815 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5816 5817 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5818 { 5819 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5820 5821 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5822 5823 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5824 } 5825 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5826