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 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2436 { 2437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2438 struct ieee80211_local *local = sdata->local; 2439 2440 mutex_lock(&local->mtx); 2441 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2442 goto out; 2443 2444 __ieee80211_stop_poll(sdata); 2445 2446 mutex_lock(&local->iflist_mtx); 2447 ieee80211_recalc_ps(local); 2448 mutex_unlock(&local->iflist_mtx); 2449 2450 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2451 goto out; 2452 2453 /* 2454 * We've received a probe response, but are not sure whether 2455 * we have or will be receiving any beacons or data, so let's 2456 * schedule the timers again, just in case. 2457 */ 2458 ieee80211_sta_reset_beacon_monitor(sdata); 2459 2460 mod_timer(&ifmgd->conn_mon_timer, 2461 round_jiffies_up(jiffies + 2462 IEEE80211_CONNECTION_IDLE_TIME)); 2463 out: 2464 mutex_unlock(&local->mtx); 2465 } 2466 2467 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2468 struct ieee80211_hdr *hdr, 2469 u16 tx_time) 2470 { 2471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2472 u16 tid = ieee80211_get_tid(hdr); 2473 int ac = ieee80211_ac_from_tid(tid); 2474 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2475 unsigned long now = jiffies; 2476 2477 if (likely(!tx_tspec->admitted_time)) 2478 return; 2479 2480 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2481 tx_tspec->consumed_tx_time = 0; 2482 tx_tspec->time_slice_start = now; 2483 2484 if (tx_tspec->downgraded) { 2485 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2486 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2487 } 2488 } 2489 2490 if (tx_tspec->downgraded) 2491 return; 2492 2493 tx_tspec->consumed_tx_time += tx_time; 2494 2495 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2496 tx_tspec->downgraded = true; 2497 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2498 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2499 } 2500 } 2501 2502 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2503 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2504 { 2505 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2506 2507 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2508 !sdata->u.mgd.probe_send_count) 2509 return; 2510 2511 if (!ack) 2512 sdata->u.mgd.nullfunc_failed = true; 2513 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2514 } 2515 2516 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2517 const u8 *src, const u8 *dst, 2518 const u8 *ssid, size_t ssid_len, 2519 struct ieee80211_channel *channel) 2520 { 2521 struct sk_buff *skb; 2522 2523 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2524 ssid, ssid_len, NULL, 0, 2525 IEEE80211_PROBE_FLAG_DIRECTED); 2526 if (skb) 2527 ieee80211_tx_skb(sdata, skb); 2528 } 2529 2530 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2531 { 2532 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2533 const u8 *ssid; 2534 u8 *dst = ifmgd->associated->bssid; 2535 u8 unicast_limit = max(1, max_probe_tries - 3); 2536 struct sta_info *sta; 2537 2538 /* 2539 * Try sending broadcast probe requests for the last three 2540 * probe requests after the first ones failed since some 2541 * buggy APs only support broadcast probe requests. 2542 */ 2543 if (ifmgd->probe_send_count >= unicast_limit) 2544 dst = NULL; 2545 2546 /* 2547 * When the hardware reports an accurate Tx ACK status, it's 2548 * better to send a nullfunc frame instead of a probe request, 2549 * as it will kick us off the AP quickly if we aren't associated 2550 * anymore. The timeout will be reset if the frame is ACKed by 2551 * the AP. 2552 */ 2553 ifmgd->probe_send_count++; 2554 2555 if (dst) { 2556 mutex_lock(&sdata->local->sta_mtx); 2557 sta = sta_info_get(sdata, dst); 2558 if (!WARN_ON(!sta)) 2559 ieee80211_check_fast_rx(sta); 2560 mutex_unlock(&sdata->local->sta_mtx); 2561 } 2562 2563 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2564 ifmgd->nullfunc_failed = false; 2565 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 2566 ifmgd->probe_send_count--; 2567 else 2568 ieee80211_send_nullfunc(sdata->local, sdata, false); 2569 } else { 2570 int ssid_len; 2571 2572 rcu_read_lock(); 2573 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2574 if (WARN_ON_ONCE(ssid == NULL)) 2575 ssid_len = 0; 2576 else 2577 ssid_len = ssid[1]; 2578 2579 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2580 ssid + 2, ssid_len, 2581 ifmgd->associated->channel); 2582 rcu_read_unlock(); 2583 } 2584 2585 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2586 run_again(sdata, ifmgd->probe_timeout); 2587 } 2588 2589 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2590 bool beacon) 2591 { 2592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2593 bool already = false; 2594 2595 if (!ieee80211_sdata_running(sdata)) 2596 return; 2597 2598 sdata_lock(sdata); 2599 2600 if (!ifmgd->associated) 2601 goto out; 2602 2603 mutex_lock(&sdata->local->mtx); 2604 2605 if (sdata->local->tmp_channel || sdata->local->scanning) { 2606 mutex_unlock(&sdata->local->mtx); 2607 goto out; 2608 } 2609 2610 if (beacon) { 2611 mlme_dbg_ratelimited(sdata, 2612 "detected beacon loss from AP (missed %d beacons) - probing\n", 2613 beacon_loss_count); 2614 2615 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2616 } 2617 2618 /* 2619 * The driver/our work has already reported this event or the 2620 * connection monitoring has kicked in and we have already sent 2621 * a probe request. Or maybe the AP died and the driver keeps 2622 * reporting until we disassociate... 2623 * 2624 * In either case we have to ignore the current call to this 2625 * function (except for setting the correct probe reason bit) 2626 * because otherwise we would reset the timer every time and 2627 * never check whether we received a probe response! 2628 */ 2629 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2630 already = true; 2631 2632 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2633 2634 mutex_unlock(&sdata->local->mtx); 2635 2636 if (already) 2637 goto out; 2638 2639 mutex_lock(&sdata->local->iflist_mtx); 2640 ieee80211_recalc_ps(sdata->local); 2641 mutex_unlock(&sdata->local->iflist_mtx); 2642 2643 ifmgd->probe_send_count = 0; 2644 ieee80211_mgd_probe_ap_send(sdata); 2645 out: 2646 sdata_unlock(sdata); 2647 } 2648 2649 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2650 struct ieee80211_vif *vif) 2651 { 2652 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2654 struct cfg80211_bss *cbss; 2655 struct sk_buff *skb; 2656 const u8 *ssid; 2657 int ssid_len; 2658 2659 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2660 return NULL; 2661 2662 sdata_assert_lock(sdata); 2663 2664 if (ifmgd->associated) 2665 cbss = ifmgd->associated; 2666 else if (ifmgd->auth_data) 2667 cbss = ifmgd->auth_data->bss; 2668 else if (ifmgd->assoc_data) 2669 cbss = ifmgd->assoc_data->bss; 2670 else 2671 return NULL; 2672 2673 rcu_read_lock(); 2674 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2675 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2676 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2677 ssid_len = 0; 2678 else 2679 ssid_len = ssid[1]; 2680 2681 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2682 (u32) -1, cbss->channel, 2683 ssid + 2, ssid_len, 2684 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2685 rcu_read_unlock(); 2686 2687 return skb; 2688 } 2689 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2690 2691 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2692 const u8 *buf, size_t len, bool tx, 2693 u16 reason) 2694 { 2695 struct ieee80211_event event = { 2696 .type = MLME_EVENT, 2697 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2698 .u.mlme.reason = reason, 2699 }; 2700 2701 if (tx) 2702 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2703 else 2704 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2705 2706 drv_event_callback(sdata->local, sdata, &event); 2707 } 2708 2709 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2710 { 2711 struct ieee80211_local *local = sdata->local; 2712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2713 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2714 bool tx; 2715 2716 sdata_lock(sdata); 2717 if (!ifmgd->associated) { 2718 sdata_unlock(sdata); 2719 return; 2720 } 2721 2722 tx = !sdata->csa_block_tx; 2723 2724 /* AP is probably out of range (or not reachable for another reason) so 2725 * remove the bss struct for that AP. 2726 */ 2727 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2728 2729 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2730 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2731 tx, frame_buf); 2732 mutex_lock(&local->mtx); 2733 sdata->vif.csa_active = false; 2734 ifmgd->csa_waiting_bcn = false; 2735 if (sdata->csa_block_tx) { 2736 ieee80211_wake_vif_queues(local, sdata, 2737 IEEE80211_QUEUE_STOP_REASON_CSA); 2738 sdata->csa_block_tx = false; 2739 } 2740 mutex_unlock(&local->mtx); 2741 2742 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2743 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2744 2745 sdata_unlock(sdata); 2746 } 2747 2748 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2749 { 2750 struct ieee80211_sub_if_data *sdata = 2751 container_of(work, struct ieee80211_sub_if_data, 2752 u.mgd.beacon_connection_loss_work); 2753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2754 2755 if (ifmgd->associated) 2756 ifmgd->beacon_loss_count++; 2757 2758 if (ifmgd->connection_loss) { 2759 sdata_info(sdata, "Connection to AP %pM lost\n", 2760 ifmgd->bssid); 2761 __ieee80211_disconnect(sdata); 2762 } else { 2763 ieee80211_mgd_probe_ap(sdata, true); 2764 } 2765 } 2766 2767 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2768 { 2769 struct ieee80211_sub_if_data *sdata = 2770 container_of(work, struct ieee80211_sub_if_data, 2771 u.mgd.csa_connection_drop_work); 2772 2773 __ieee80211_disconnect(sdata); 2774 } 2775 2776 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2777 { 2778 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2779 struct ieee80211_hw *hw = &sdata->local->hw; 2780 2781 trace_api_beacon_loss(sdata); 2782 2783 sdata->u.mgd.connection_loss = false; 2784 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2785 } 2786 EXPORT_SYMBOL(ieee80211_beacon_loss); 2787 2788 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2789 { 2790 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2791 struct ieee80211_hw *hw = &sdata->local->hw; 2792 2793 trace_api_connection_loss(sdata); 2794 2795 sdata->u.mgd.connection_loss = true; 2796 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2797 } 2798 EXPORT_SYMBOL(ieee80211_connection_loss); 2799 2800 2801 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2802 bool assoc) 2803 { 2804 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2805 2806 sdata_assert_lock(sdata); 2807 2808 if (!assoc) { 2809 /* 2810 * we are not authenticated yet, the only timer that could be 2811 * running is the timeout for the authentication response which 2812 * which is not relevant anymore. 2813 */ 2814 del_timer_sync(&sdata->u.mgd.timer); 2815 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2816 2817 eth_zero_addr(sdata->u.mgd.bssid); 2818 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2819 sdata->u.mgd.flags = 0; 2820 mutex_lock(&sdata->local->mtx); 2821 ieee80211_vif_release_channel(sdata); 2822 mutex_unlock(&sdata->local->mtx); 2823 } 2824 2825 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2826 kfree(auth_data); 2827 sdata->u.mgd.auth_data = NULL; 2828 } 2829 2830 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2831 bool assoc, bool abandon) 2832 { 2833 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2834 2835 sdata_assert_lock(sdata); 2836 2837 if (!assoc) { 2838 /* 2839 * we are not associated yet, the only timer that could be 2840 * running is the timeout for the association response which 2841 * which is not relevant anymore. 2842 */ 2843 del_timer_sync(&sdata->u.mgd.timer); 2844 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2845 2846 eth_zero_addr(sdata->u.mgd.bssid); 2847 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2848 sdata->u.mgd.flags = 0; 2849 sdata->vif.mu_mimo_owner = false; 2850 2851 mutex_lock(&sdata->local->mtx); 2852 ieee80211_vif_release_channel(sdata); 2853 mutex_unlock(&sdata->local->mtx); 2854 2855 if (abandon) 2856 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2857 } 2858 2859 kfree(assoc_data); 2860 sdata->u.mgd.assoc_data = NULL; 2861 } 2862 2863 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2864 struct ieee80211_mgmt *mgmt, size_t len) 2865 { 2866 struct ieee80211_local *local = sdata->local; 2867 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2868 u8 *pos; 2869 struct ieee802_11_elems elems; 2870 u32 tx_flags = 0; 2871 2872 pos = mgmt->u.auth.variable; 2873 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2874 mgmt->bssid, auth_data->bss->bssid); 2875 if (!elems.challenge) 2876 return; 2877 auth_data->expected_transaction = 4; 2878 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2879 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2880 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2881 IEEE80211_TX_INTFL_MLME_CONN_TX; 2882 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2883 elems.challenge - 2, elems.challenge_len + 2, 2884 auth_data->bss->bssid, auth_data->bss->bssid, 2885 auth_data->key, auth_data->key_len, 2886 auth_data->key_idx, tx_flags); 2887 } 2888 2889 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2890 const u8 *bssid) 2891 { 2892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2893 struct sta_info *sta; 2894 bool result = true; 2895 2896 sdata_info(sdata, "authenticated\n"); 2897 ifmgd->auth_data->done = true; 2898 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2899 ifmgd->auth_data->timeout_started = true; 2900 run_again(sdata, ifmgd->auth_data->timeout); 2901 2902 /* move station state to auth */ 2903 mutex_lock(&sdata->local->sta_mtx); 2904 sta = sta_info_get(sdata, bssid); 2905 if (!sta) { 2906 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2907 result = false; 2908 goto out; 2909 } 2910 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2911 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2912 result = false; 2913 goto out; 2914 } 2915 2916 out: 2917 mutex_unlock(&sdata->local->sta_mtx); 2918 return result; 2919 } 2920 2921 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2922 struct ieee80211_mgmt *mgmt, size_t len) 2923 { 2924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2925 u8 bssid[ETH_ALEN]; 2926 u16 auth_alg, auth_transaction, status_code; 2927 struct ieee80211_event event = { 2928 .type = MLME_EVENT, 2929 .u.mlme.data = AUTH_EVENT, 2930 }; 2931 2932 sdata_assert_lock(sdata); 2933 2934 if (len < 24 + 6) 2935 return; 2936 2937 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2938 return; 2939 2940 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2941 2942 if (!ether_addr_equal(bssid, mgmt->bssid)) 2943 return; 2944 2945 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2946 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2947 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2948 2949 if (auth_alg != ifmgd->auth_data->algorithm || 2950 (auth_alg != WLAN_AUTH_SAE && 2951 auth_transaction != ifmgd->auth_data->expected_transaction) || 2952 (auth_alg == WLAN_AUTH_SAE && 2953 (auth_transaction < ifmgd->auth_data->expected_transaction || 2954 auth_transaction > 2))) { 2955 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2956 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2957 auth_transaction, 2958 ifmgd->auth_data->expected_transaction); 2959 return; 2960 } 2961 2962 if (status_code != WLAN_STATUS_SUCCESS) { 2963 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2964 2965 if (auth_alg == WLAN_AUTH_SAE && 2966 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 2967 (auth_transaction == 1 && 2968 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 2969 status_code == WLAN_STATUS_SAE_PK)))) 2970 return; 2971 2972 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2973 mgmt->sa, status_code); 2974 ieee80211_destroy_auth_data(sdata, false); 2975 event.u.mlme.status = MLME_DENIED; 2976 event.u.mlme.reason = status_code; 2977 drv_event_callback(sdata->local, sdata, &event); 2978 return; 2979 } 2980 2981 switch (ifmgd->auth_data->algorithm) { 2982 case WLAN_AUTH_OPEN: 2983 case WLAN_AUTH_LEAP: 2984 case WLAN_AUTH_FT: 2985 case WLAN_AUTH_SAE: 2986 case WLAN_AUTH_FILS_SK: 2987 case WLAN_AUTH_FILS_SK_PFS: 2988 case WLAN_AUTH_FILS_PK: 2989 break; 2990 case WLAN_AUTH_SHARED_KEY: 2991 if (ifmgd->auth_data->expected_transaction != 4) { 2992 ieee80211_auth_challenge(sdata, mgmt, len); 2993 /* need another frame */ 2994 return; 2995 } 2996 break; 2997 default: 2998 WARN_ONCE(1, "invalid auth alg %d", 2999 ifmgd->auth_data->algorithm); 3000 return; 3001 } 3002 3003 event.u.mlme.status = MLME_SUCCESS; 3004 drv_event_callback(sdata->local, sdata, &event); 3005 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3006 (auth_transaction == 2 && 3007 ifmgd->auth_data->expected_transaction == 2)) { 3008 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3009 return; /* ignore frame -- wait for timeout */ 3010 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3011 auth_transaction == 2) { 3012 sdata_info(sdata, "SAE peer confirmed\n"); 3013 ifmgd->auth_data->peer_confirmed = true; 3014 } 3015 3016 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3017 } 3018 3019 #define case_WLAN(type) \ 3020 case WLAN_REASON_##type: return #type 3021 3022 const char *ieee80211_get_reason_code_string(u16 reason_code) 3023 { 3024 switch (reason_code) { 3025 case_WLAN(UNSPECIFIED); 3026 case_WLAN(PREV_AUTH_NOT_VALID); 3027 case_WLAN(DEAUTH_LEAVING); 3028 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3029 case_WLAN(DISASSOC_AP_BUSY); 3030 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3031 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3032 case_WLAN(DISASSOC_STA_HAS_LEFT); 3033 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3034 case_WLAN(DISASSOC_BAD_POWER); 3035 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3036 case_WLAN(INVALID_IE); 3037 case_WLAN(MIC_FAILURE); 3038 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3039 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3040 case_WLAN(IE_DIFFERENT); 3041 case_WLAN(INVALID_GROUP_CIPHER); 3042 case_WLAN(INVALID_PAIRWISE_CIPHER); 3043 case_WLAN(INVALID_AKMP); 3044 case_WLAN(UNSUPP_RSN_VERSION); 3045 case_WLAN(INVALID_RSN_IE_CAP); 3046 case_WLAN(IEEE8021X_FAILED); 3047 case_WLAN(CIPHER_SUITE_REJECTED); 3048 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3049 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3050 case_WLAN(DISASSOC_LOW_ACK); 3051 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3052 case_WLAN(QSTA_LEAVE_QBSS); 3053 case_WLAN(QSTA_NOT_USE); 3054 case_WLAN(QSTA_REQUIRE_SETUP); 3055 case_WLAN(QSTA_TIMEOUT); 3056 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3057 case_WLAN(MESH_PEER_CANCELED); 3058 case_WLAN(MESH_MAX_PEERS); 3059 case_WLAN(MESH_CONFIG); 3060 case_WLAN(MESH_CLOSE); 3061 case_WLAN(MESH_MAX_RETRIES); 3062 case_WLAN(MESH_CONFIRM_TIMEOUT); 3063 case_WLAN(MESH_INVALID_GTK); 3064 case_WLAN(MESH_INCONSISTENT_PARAM); 3065 case_WLAN(MESH_INVALID_SECURITY); 3066 case_WLAN(MESH_PATH_ERROR); 3067 case_WLAN(MESH_PATH_NOFORWARD); 3068 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3069 case_WLAN(MAC_EXISTS_IN_MBSS); 3070 case_WLAN(MESH_CHAN_REGULATORY); 3071 case_WLAN(MESH_CHAN); 3072 default: return "<unknown>"; 3073 } 3074 } 3075 3076 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3077 struct ieee80211_mgmt *mgmt, size_t len) 3078 { 3079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3080 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3081 3082 sdata_assert_lock(sdata); 3083 3084 if (len < 24 + 2) 3085 return; 3086 3087 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3088 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3089 return; 3090 } 3091 3092 if (ifmgd->associated && 3093 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3094 const u8 *bssid = ifmgd->associated->bssid; 3095 3096 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3097 bssid, reason_code, 3098 ieee80211_get_reason_code_string(reason_code)); 3099 3100 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3101 3102 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3103 reason_code); 3104 return; 3105 } 3106 3107 if (ifmgd->assoc_data && 3108 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3109 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3110 3111 sdata_info(sdata, 3112 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3113 bssid, reason_code, 3114 ieee80211_get_reason_code_string(reason_code)); 3115 3116 ieee80211_destroy_assoc_data(sdata, false, true); 3117 3118 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3119 return; 3120 } 3121 } 3122 3123 3124 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3125 struct ieee80211_mgmt *mgmt, size_t len) 3126 { 3127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3128 u16 reason_code; 3129 3130 sdata_assert_lock(sdata); 3131 3132 if (len < 24 + 2) 3133 return; 3134 3135 if (!ifmgd->associated || 3136 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3137 return; 3138 3139 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3140 3141 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3142 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3143 return; 3144 } 3145 3146 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3147 mgmt->sa, reason_code, 3148 ieee80211_get_reason_code_string(reason_code)); 3149 3150 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3151 3152 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3153 } 3154 3155 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3156 u8 *supp_rates, unsigned int supp_rates_len, 3157 u32 *rates, u32 *basic_rates, 3158 bool *have_higher_than_11mbit, 3159 int *min_rate, int *min_rate_index, 3160 int shift) 3161 { 3162 int i, j; 3163 3164 for (i = 0; i < supp_rates_len; i++) { 3165 int rate = supp_rates[i] & 0x7f; 3166 bool is_basic = !!(supp_rates[i] & 0x80); 3167 3168 if ((rate * 5 * (1 << shift)) > 110) 3169 *have_higher_than_11mbit = true; 3170 3171 /* 3172 * Skip HT, VHT and HE BSS membership selectors since they're 3173 * not rates. 3174 * 3175 * Note: Even though the membership selector and the basic 3176 * rate flag share the same bit, they are not exactly 3177 * the same. 3178 */ 3179 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3180 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3181 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY)) 3182 continue; 3183 3184 for (j = 0; j < sband->n_bitrates; j++) { 3185 struct ieee80211_rate *br; 3186 int brate; 3187 3188 br = &sband->bitrates[j]; 3189 3190 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3191 if (brate == rate) { 3192 *rates |= BIT(j); 3193 if (is_basic) 3194 *basic_rates |= BIT(j); 3195 if ((rate * 5) < *min_rate) { 3196 *min_rate = rate * 5; 3197 *min_rate_index = j; 3198 } 3199 break; 3200 } 3201 } 3202 } 3203 } 3204 3205 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3206 const struct ieee802_11_elems *elems) 3207 { 3208 if (elems->ext_capab_len < 10) 3209 return false; 3210 3211 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3212 return false; 3213 3214 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3215 IEEE80211_HE_MAC_CAP0_TWT_RES; 3216 } 3217 3218 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3219 struct sta_info *sta, 3220 struct ieee802_11_elems *elems) 3221 { 3222 bool twt = ieee80211_twt_req_supported(sta, elems); 3223 3224 if (sdata->vif.bss_conf.twt_requester != twt) { 3225 sdata->vif.bss_conf.twt_requester = twt; 3226 return BSS_CHANGED_TWT; 3227 } 3228 return 0; 3229 } 3230 3231 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3232 struct cfg80211_bss *cbss, 3233 struct ieee80211_mgmt *mgmt, size_t len, 3234 struct ieee802_11_elems *elems) 3235 { 3236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3237 struct ieee80211_local *local = sdata->local; 3238 struct ieee80211_supported_band *sband; 3239 struct sta_info *sta; 3240 u16 capab_info, aid; 3241 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3242 const struct cfg80211_bss_ies *bss_ies = NULL; 3243 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3244 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3245 u32 changed = 0; 3246 int err; 3247 bool ret; 3248 3249 /* AssocResp and ReassocResp have identical structure */ 3250 3251 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3252 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3253 3254 /* 3255 * The 5 MSB of the AID field are reserved 3256 * (802.11-2016 9.4.1.8 AID field) 3257 */ 3258 aid &= 0x7ff; 3259 3260 ifmgd->broken_ap = false; 3261 3262 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3263 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3264 aid); 3265 aid = 0; 3266 ifmgd->broken_ap = true; 3267 } 3268 3269 if (!elems->supp_rates) { 3270 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3271 return false; 3272 } 3273 3274 sdata->vif.bss_conf.aid = aid; 3275 ifmgd->tdls_chan_switch_prohibited = 3276 elems->ext_capab && elems->ext_capab_len >= 5 && 3277 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3278 3279 /* 3280 * Some APs are erroneously not including some information in their 3281 * (re)association response frames. Try to recover by using the data 3282 * from the beacon or probe response. This seems to afflict mobile 3283 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3284 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3285 */ 3286 if (!is_6ghz && 3287 ((assoc_data->wmm && !elems->wmm_param) || 3288 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3289 (!elems->ht_cap_elem || !elems->ht_operation)) || 3290 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3291 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3292 const struct cfg80211_bss_ies *ies; 3293 struct ieee802_11_elems bss_elems; 3294 3295 rcu_read_lock(); 3296 ies = rcu_dereference(cbss->ies); 3297 if (ies) 3298 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3299 GFP_ATOMIC); 3300 rcu_read_unlock(); 3301 if (!bss_ies) 3302 return false; 3303 3304 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3305 false, &bss_elems, 3306 mgmt->bssid, 3307 assoc_data->bss->bssid); 3308 if (assoc_data->wmm && 3309 !elems->wmm_param && bss_elems.wmm_param) { 3310 elems->wmm_param = bss_elems.wmm_param; 3311 sdata_info(sdata, 3312 "AP bug: WMM param missing from AssocResp\n"); 3313 } 3314 3315 /* 3316 * Also check if we requested HT/VHT, otherwise the AP doesn't 3317 * have to include the IEs in the (re)association response. 3318 */ 3319 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3320 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3321 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3322 sdata_info(sdata, 3323 "AP bug: HT capability missing from AssocResp\n"); 3324 } 3325 if (!elems->ht_operation && bss_elems.ht_operation && 3326 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3327 elems->ht_operation = bss_elems.ht_operation; 3328 sdata_info(sdata, 3329 "AP bug: HT operation missing from AssocResp\n"); 3330 } 3331 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3332 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3333 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3334 sdata_info(sdata, 3335 "AP bug: VHT capa missing from AssocResp\n"); 3336 } 3337 if (!elems->vht_operation && bss_elems.vht_operation && 3338 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3339 elems->vht_operation = bss_elems.vht_operation; 3340 sdata_info(sdata, 3341 "AP bug: VHT operation missing from AssocResp\n"); 3342 } 3343 } 3344 3345 /* 3346 * We previously checked these in the beacon/probe response, so 3347 * they should be present here. This is just a safety net. 3348 */ 3349 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3350 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3351 sdata_info(sdata, 3352 "HT AP is missing WMM params or HT capability/operation\n"); 3353 ret = false; 3354 goto out; 3355 } 3356 3357 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3358 (!elems->vht_cap_elem || !elems->vht_operation)) { 3359 sdata_info(sdata, 3360 "VHT AP is missing VHT capability/operation\n"); 3361 ret = false; 3362 goto out; 3363 } 3364 3365 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3366 !elems->he_6ghz_capa) { 3367 sdata_info(sdata, 3368 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3369 ret = false; 3370 goto out; 3371 } 3372 3373 mutex_lock(&sdata->local->sta_mtx); 3374 /* 3375 * station info was already allocated and inserted before 3376 * the association and should be available to us 3377 */ 3378 sta = sta_info_get(sdata, cbss->bssid); 3379 if (WARN_ON(!sta)) { 3380 mutex_unlock(&sdata->local->sta_mtx); 3381 ret = false; 3382 goto out; 3383 } 3384 3385 sband = ieee80211_get_sband(sdata); 3386 if (!sband) { 3387 mutex_unlock(&sdata->local->sta_mtx); 3388 ret = false; 3389 goto out; 3390 } 3391 3392 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3393 (!elems->he_cap || !elems->he_operation)) { 3394 mutex_unlock(&sdata->local->sta_mtx); 3395 sdata_info(sdata, 3396 "HE AP is missing HE capability/operation\n"); 3397 ret = false; 3398 goto out; 3399 } 3400 3401 /* Set up internal HT/VHT capabilities */ 3402 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3403 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3404 elems->ht_cap_elem, sta); 3405 3406 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3407 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3408 elems->vht_cap_elem, sta); 3409 3410 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3411 elems->he_cap) { 3412 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3413 elems->he_cap, 3414 elems->he_cap_len, 3415 elems->he_6ghz_capa, 3416 sta); 3417 3418 bss_conf->he_support = sta->sta.he_cap.has_he; 3419 if (elems->rsnx && elems->rsnx_len && 3420 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3421 wiphy_ext_feature_isset(local->hw.wiphy, 3422 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3423 bss_conf->twt_protected = true; 3424 else 3425 bss_conf->twt_protected = false; 3426 3427 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3428 } else { 3429 bss_conf->he_support = false; 3430 bss_conf->twt_requester = false; 3431 bss_conf->twt_protected = false; 3432 } 3433 3434 if (bss_conf->he_support) { 3435 bss_conf->he_bss_color.color = 3436 le32_get_bits(elems->he_operation->he_oper_params, 3437 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3438 bss_conf->he_bss_color.partial = 3439 le32_get_bits(elems->he_operation->he_oper_params, 3440 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3441 bss_conf->he_bss_color.enabled = 3442 !le32_get_bits(elems->he_operation->he_oper_params, 3443 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3444 3445 if (bss_conf->he_bss_color.enabled) 3446 changed |= BSS_CHANGED_HE_BSS_COLOR; 3447 3448 bss_conf->htc_trig_based_pkt_ext = 3449 le32_get_bits(elems->he_operation->he_oper_params, 3450 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3451 bss_conf->frame_time_rts_th = 3452 le32_get_bits(elems->he_operation->he_oper_params, 3453 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3454 3455 bss_conf->multi_sta_back_32bit = 3456 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3457 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3458 3459 bss_conf->ack_enabled = 3460 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3461 IEEE80211_HE_MAC_CAP2_ACK_EN; 3462 3463 bss_conf->uora_exists = !!elems->uora_element; 3464 if (elems->uora_element) 3465 bss_conf->uora_ocw_range = elems->uora_element[0]; 3466 3467 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3468 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3469 /* TODO: OPEN: what happens if BSS color disable is set? */ 3470 } 3471 3472 if (cbss->transmitted_bss) { 3473 bss_conf->nontransmitted = true; 3474 ether_addr_copy(bss_conf->transmitter_bssid, 3475 cbss->transmitted_bss->bssid); 3476 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3477 bss_conf->bssid_index = cbss->bssid_index; 3478 } 3479 3480 /* 3481 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3482 * in their association response, so ignore that data for our own 3483 * configuration. If it changed since the last beacon, we'll get the 3484 * next beacon and update then. 3485 */ 3486 3487 /* 3488 * If an operating mode notification IE is present, override the 3489 * NSS calculation (that would be done in rate_control_rate_init()) 3490 * and use the # of streams from that element. 3491 */ 3492 if (elems->opmode_notif && 3493 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3494 u8 nss; 3495 3496 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3497 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3498 nss += 1; 3499 sta->sta.rx_nss = nss; 3500 } 3501 3502 rate_control_rate_init(sta); 3503 3504 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3505 set_sta_flag(sta, WLAN_STA_MFP); 3506 sta->sta.mfp = true; 3507 } else { 3508 sta->sta.mfp = false; 3509 } 3510 3511 sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3512 3513 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3514 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3515 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3516 if (err) { 3517 sdata_info(sdata, 3518 "failed to move station %pM to desired state\n", 3519 sta->sta.addr); 3520 WARN_ON(__sta_info_destroy(sta)); 3521 mutex_unlock(&sdata->local->sta_mtx); 3522 ret = false; 3523 goto out; 3524 } 3525 3526 if (sdata->wdev.use_4addr) 3527 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3528 3529 mutex_unlock(&sdata->local->sta_mtx); 3530 3531 /* 3532 * Always handle WMM once after association regardless 3533 * of the first value the AP uses. Setting -1 here has 3534 * that effect because the AP values is an unsigned 3535 * 4-bit value. 3536 */ 3537 ifmgd->wmm_last_param_set = -1; 3538 ifmgd->mu_edca_last_param_set = -1; 3539 3540 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3541 ieee80211_set_wmm_default(sdata, false, false); 3542 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3543 elems->wmm_param_len, 3544 elems->mu_edca_param_set)) { 3545 /* still enable QoS since we might have HT/VHT */ 3546 ieee80211_set_wmm_default(sdata, false, true); 3547 /* set the disable-WMM flag in this case to disable 3548 * tracking WMM parameter changes in the beacon if 3549 * the parameters weren't actually valid. Doing so 3550 * avoids changing parameters very strangely when 3551 * the AP is going back and forth between valid and 3552 * invalid parameters. 3553 */ 3554 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3555 } 3556 changed |= BSS_CHANGED_QOS; 3557 3558 if (elems->max_idle_period_ie) { 3559 bss_conf->max_idle_period = 3560 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3561 bss_conf->protected_keep_alive = 3562 !!(elems->max_idle_period_ie->idle_options & 3563 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3564 changed |= BSS_CHANGED_KEEP_ALIVE; 3565 } else { 3566 bss_conf->max_idle_period = 0; 3567 bss_conf->protected_keep_alive = false; 3568 } 3569 3570 /* set assoc capability (AID was already set earlier), 3571 * ieee80211_set_associated() will tell the driver */ 3572 bss_conf->assoc_capability = capab_info; 3573 ieee80211_set_associated(sdata, cbss, changed); 3574 3575 /* 3576 * If we're using 4-addr mode, let the AP know that we're 3577 * doing so, so that it can create the STA VLAN on its side 3578 */ 3579 if (ifmgd->use_4addr) 3580 ieee80211_send_4addr_nullfunc(local, sdata); 3581 3582 /* 3583 * Start timer to probe the connection to the AP now. 3584 * Also start the timer that will detect beacon loss. 3585 */ 3586 ieee80211_sta_reset_beacon_monitor(sdata); 3587 ieee80211_sta_reset_conn_monitor(sdata); 3588 3589 ret = true; 3590 out: 3591 kfree(bss_ies); 3592 return ret; 3593 } 3594 3595 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3596 struct ieee80211_mgmt *mgmt, 3597 size_t len) 3598 { 3599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3601 u16 capab_info, status_code, aid; 3602 struct ieee802_11_elems elems; 3603 int ac, uapsd_queues = -1; 3604 u8 *pos; 3605 bool reassoc; 3606 struct cfg80211_bss *bss; 3607 struct ieee80211_event event = { 3608 .type = MLME_EVENT, 3609 .u.mlme.data = ASSOC_EVENT, 3610 }; 3611 3612 sdata_assert_lock(sdata); 3613 3614 if (!assoc_data) 3615 return; 3616 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3617 return; 3618 3619 /* 3620 * AssocResp and ReassocResp have identical structure, so process both 3621 * of them in this function. 3622 */ 3623 3624 if (len < 24 + 6) 3625 return; 3626 3627 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3628 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3629 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3630 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3631 3632 sdata_info(sdata, 3633 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3634 reassoc ? "Rea" : "A", mgmt->sa, 3635 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3636 3637 if (assoc_data->fils_kek_len && 3638 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3639 return; 3640 3641 pos = mgmt->u.assoc_resp.variable; 3642 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3643 mgmt->bssid, assoc_data->bss->bssid); 3644 3645 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3646 elems.timeout_int && 3647 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3648 u32 tu, ms; 3649 tu = le32_to_cpu(elems.timeout_int->value); 3650 ms = tu * 1024 / 1000; 3651 sdata_info(sdata, 3652 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3653 mgmt->sa, tu, ms); 3654 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3655 assoc_data->timeout_started = true; 3656 if (ms > IEEE80211_ASSOC_TIMEOUT) 3657 run_again(sdata, assoc_data->timeout); 3658 return; 3659 } 3660 3661 bss = assoc_data->bss; 3662 3663 if (status_code != WLAN_STATUS_SUCCESS) { 3664 sdata_info(sdata, "%pM denied association (code=%d)\n", 3665 mgmt->sa, status_code); 3666 ieee80211_destroy_assoc_data(sdata, false, false); 3667 event.u.mlme.status = MLME_DENIED; 3668 event.u.mlme.reason = status_code; 3669 drv_event_callback(sdata->local, sdata, &event); 3670 } else { 3671 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) { 3672 /* oops -- internal error -- send timeout for now */ 3673 ieee80211_destroy_assoc_data(sdata, false, false); 3674 cfg80211_assoc_timeout(sdata->dev, bss); 3675 return; 3676 } 3677 event.u.mlme.status = MLME_SUCCESS; 3678 drv_event_callback(sdata->local, sdata, &event); 3679 sdata_info(sdata, "associated\n"); 3680 3681 /* 3682 * destroy assoc_data afterwards, as otherwise an idle 3683 * recalc after assoc_data is NULL but before associated 3684 * is set can cause the interface to go idle 3685 */ 3686 ieee80211_destroy_assoc_data(sdata, true, false); 3687 3688 /* get uapsd queues configuration */ 3689 uapsd_queues = 0; 3690 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3691 if (sdata->tx_conf[ac].uapsd) 3692 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3693 } 3694 3695 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues, 3696 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3697 } 3698 3699 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3700 struct ieee80211_mgmt *mgmt, size_t len, 3701 struct ieee80211_rx_status *rx_status) 3702 { 3703 struct ieee80211_local *local = sdata->local; 3704 struct ieee80211_bss *bss; 3705 struct ieee80211_channel *channel; 3706 3707 sdata_assert_lock(sdata); 3708 3709 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3710 ieee80211_rx_status_to_khz(rx_status)); 3711 if (!channel) 3712 return; 3713 3714 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3715 if (bss) { 3716 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3717 ieee80211_rx_bss_put(local, bss); 3718 } 3719 } 3720 3721 3722 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3723 struct sk_buff *skb) 3724 { 3725 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3726 struct ieee80211_if_managed *ifmgd; 3727 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3728 struct ieee80211_channel *channel; 3729 size_t baselen, len = skb->len; 3730 3731 ifmgd = &sdata->u.mgd; 3732 3733 sdata_assert_lock(sdata); 3734 3735 /* 3736 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3737 * "If a 6 GHz AP receives a Probe Request frame and responds with 3738 * a Probe Response frame [..], the Address 1 field of the Probe 3739 * Response frame shall be set to the broadcast address [..]" 3740 * So, on 6GHz band we should also accept broadcast responses. 3741 */ 3742 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3743 rx_status->freq); 3744 if (!channel) 3745 return; 3746 3747 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3748 (channel->band != NL80211_BAND_6GHZ || 3749 !is_broadcast_ether_addr(mgmt->da))) 3750 return; /* ignore ProbeResp to foreign address */ 3751 3752 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3753 if (baselen > len) 3754 return; 3755 3756 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3757 3758 if (ifmgd->associated && 3759 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3760 ieee80211_reset_ap_probe(sdata); 3761 } 3762 3763 /* 3764 * This is the canonical list of information elements we care about, 3765 * the filter code also gives us all changes to the Microsoft OUI 3766 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3767 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3768 * changes to requested client power. 3769 * 3770 * We implement beacon filtering in software since that means we can 3771 * avoid processing the frame here and in cfg80211, and userspace 3772 * will not be able to tell whether the hardware supports it or not. 3773 * 3774 * XXX: This list needs to be dynamic -- userspace needs to be able to 3775 * add items it requires. It also needs to be able to tell us to 3776 * look out for other vendor IEs. 3777 */ 3778 static const u64 care_about_ies = 3779 (1ULL << WLAN_EID_COUNTRY) | 3780 (1ULL << WLAN_EID_ERP_INFO) | 3781 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3782 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3783 (1ULL << WLAN_EID_HT_CAPABILITY) | 3784 (1ULL << WLAN_EID_HT_OPERATION) | 3785 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3786 3787 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3788 struct ieee80211_if_managed *ifmgd, 3789 struct ieee80211_bss_conf *bss_conf, 3790 struct ieee80211_local *local, 3791 struct ieee80211_rx_status *rx_status) 3792 { 3793 /* Track average RSSI from the Beacon frames of the current AP */ 3794 3795 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3796 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3797 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3798 ifmgd->last_cqm_event_signal = 0; 3799 ifmgd->count_beacon_signal = 1; 3800 ifmgd->last_ave_beacon_signal = 0; 3801 } else { 3802 ifmgd->count_beacon_signal++; 3803 } 3804 3805 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3806 3807 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3808 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3809 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3810 int last_sig = ifmgd->last_ave_beacon_signal; 3811 struct ieee80211_event event = { 3812 .type = RSSI_EVENT, 3813 }; 3814 3815 /* 3816 * if signal crosses either of the boundaries, invoke callback 3817 * with appropriate parameters 3818 */ 3819 if (sig > ifmgd->rssi_max_thold && 3820 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3821 ifmgd->last_ave_beacon_signal = sig; 3822 event.u.rssi.data = RSSI_EVENT_HIGH; 3823 drv_event_callback(local, sdata, &event); 3824 } else if (sig < ifmgd->rssi_min_thold && 3825 (last_sig >= ifmgd->rssi_max_thold || 3826 last_sig == 0)) { 3827 ifmgd->last_ave_beacon_signal = sig; 3828 event.u.rssi.data = RSSI_EVENT_LOW; 3829 drv_event_callback(local, sdata, &event); 3830 } 3831 } 3832 3833 if (bss_conf->cqm_rssi_thold && 3834 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3835 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3836 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3837 int last_event = ifmgd->last_cqm_event_signal; 3838 int thold = bss_conf->cqm_rssi_thold; 3839 int hyst = bss_conf->cqm_rssi_hyst; 3840 3841 if (sig < thold && 3842 (last_event == 0 || sig < last_event - hyst)) { 3843 ifmgd->last_cqm_event_signal = sig; 3844 ieee80211_cqm_rssi_notify( 3845 &sdata->vif, 3846 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3847 sig, GFP_KERNEL); 3848 } else if (sig > thold && 3849 (last_event == 0 || sig > last_event + hyst)) { 3850 ifmgd->last_cqm_event_signal = sig; 3851 ieee80211_cqm_rssi_notify( 3852 &sdata->vif, 3853 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3854 sig, GFP_KERNEL); 3855 } 3856 } 3857 3858 if (bss_conf->cqm_rssi_low && 3859 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3860 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3861 int last_event = ifmgd->last_cqm_event_signal; 3862 int low = bss_conf->cqm_rssi_low; 3863 int high = bss_conf->cqm_rssi_high; 3864 3865 if (sig < low && 3866 (last_event == 0 || last_event >= low)) { 3867 ifmgd->last_cqm_event_signal = sig; 3868 ieee80211_cqm_rssi_notify( 3869 &sdata->vif, 3870 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3871 sig, GFP_KERNEL); 3872 } else if (sig > high && 3873 (last_event == 0 || last_event <= high)) { 3874 ifmgd->last_cqm_event_signal = sig; 3875 ieee80211_cqm_rssi_notify( 3876 &sdata->vif, 3877 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3878 sig, GFP_KERNEL); 3879 } 3880 } 3881 } 3882 3883 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3884 struct cfg80211_bss *bss) 3885 { 3886 if (ether_addr_equal(tx_bssid, bss->bssid)) 3887 return true; 3888 if (!bss->transmitted_bss) 3889 return false; 3890 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3891 } 3892 3893 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3894 struct ieee80211_mgmt *mgmt, size_t len, 3895 struct ieee80211_rx_status *rx_status) 3896 { 3897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3898 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3899 size_t baselen; 3900 struct ieee802_11_elems elems; 3901 struct ieee80211_local *local = sdata->local; 3902 struct ieee80211_chanctx_conf *chanctx_conf; 3903 struct ieee80211_channel *chan; 3904 struct sta_info *sta; 3905 u32 changed = 0; 3906 bool erp_valid; 3907 u8 erp_value = 0; 3908 u32 ncrc; 3909 u8 *bssid; 3910 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3911 3912 sdata_assert_lock(sdata); 3913 3914 /* Process beacon from the current BSS */ 3915 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3916 if (baselen > len) 3917 return; 3918 3919 rcu_read_lock(); 3920 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3921 if (!chanctx_conf) { 3922 rcu_read_unlock(); 3923 return; 3924 } 3925 3926 if (ieee80211_rx_status_to_khz(rx_status) != 3927 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 3928 rcu_read_unlock(); 3929 return; 3930 } 3931 chan = chanctx_conf->def.chan; 3932 rcu_read_unlock(); 3933 3934 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3935 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) { 3936 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3937 len - baselen, false, &elems, 3938 mgmt->bssid, 3939 ifmgd->assoc_data->bss->bssid); 3940 3941 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3942 3943 if (elems.dtim_period) 3944 ifmgd->dtim_period = elems.dtim_period; 3945 ifmgd->have_beacon = true; 3946 ifmgd->assoc_data->need_beacon = false; 3947 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3948 sdata->vif.bss_conf.sync_tsf = 3949 le64_to_cpu(mgmt->u.beacon.timestamp); 3950 sdata->vif.bss_conf.sync_device_ts = 3951 rx_status->device_timestamp; 3952 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3953 } 3954 3955 if (elems.mbssid_config_ie) 3956 bss_conf->profile_periodicity = 3957 elems.mbssid_config_ie->profile_periodicity; 3958 3959 if (elems.ext_capab_len >= 11 && 3960 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 3961 bss_conf->ema_ap = true; 3962 3963 /* continue assoc process */ 3964 ifmgd->assoc_data->timeout = jiffies; 3965 ifmgd->assoc_data->timeout_started = true; 3966 run_again(sdata, ifmgd->assoc_data->timeout); 3967 return; 3968 } 3969 3970 if (!ifmgd->associated || 3971 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated)) 3972 return; 3973 bssid = ifmgd->associated->bssid; 3974 3975 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3976 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3977 local, rx_status); 3978 3979 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3980 mlme_dbg_ratelimited(sdata, 3981 "cancelling AP probe due to a received beacon\n"); 3982 ieee80211_reset_ap_probe(sdata); 3983 } 3984 3985 /* 3986 * Push the beacon loss detection into the future since 3987 * we are processing a beacon from the AP just now. 3988 */ 3989 ieee80211_sta_reset_beacon_monitor(sdata); 3990 3991 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3992 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3993 len - baselen, false, &elems, 3994 care_about_ies, ncrc, 3995 mgmt->bssid, bssid); 3996 3997 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3998 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) { 3999 if (local->hw.conf.dynamic_ps_timeout > 0) { 4000 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4001 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4002 ieee80211_hw_config(local, 4003 IEEE80211_CONF_CHANGE_PS); 4004 } 4005 ieee80211_send_nullfunc(local, sdata, false); 4006 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4007 local->pspolling = true; 4008 4009 /* 4010 * Here is assumed that the driver will be 4011 * able to send ps-poll frame and receive a 4012 * response even though power save mode is 4013 * enabled, but some drivers might require 4014 * to disable power save here. This needs 4015 * to be investigated. 4016 */ 4017 ieee80211_send_pspoll(local, sdata); 4018 } 4019 } 4020 4021 if (sdata->vif.p2p || 4022 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4023 struct ieee80211_p2p_noa_attr noa = {}; 4024 int ret; 4025 4026 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 4027 len - baselen, 4028 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4029 (u8 *) &noa, sizeof(noa)); 4030 if (ret >= 2) { 4031 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4032 /* valid noa_attr and index changed */ 4033 sdata->u.mgd.p2p_noa_index = noa.index; 4034 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4035 changed |= BSS_CHANGED_P2P_PS; 4036 /* 4037 * make sure we update all information, the CRC 4038 * mechanism doesn't look at P2P attributes. 4039 */ 4040 ifmgd->beacon_crc_valid = false; 4041 } 4042 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4043 /* noa_attr not found and we had valid noa_attr before */ 4044 sdata->u.mgd.p2p_noa_index = -1; 4045 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4046 changed |= BSS_CHANGED_P2P_PS; 4047 ifmgd->beacon_crc_valid = false; 4048 } 4049 } 4050 4051 if (ifmgd->csa_waiting_bcn) 4052 ieee80211_chswitch_post_beacon(sdata); 4053 4054 /* 4055 * Update beacon timing and dtim count on every beacon appearance. This 4056 * will allow the driver to use the most updated values. Do it before 4057 * comparing this one with last received beacon. 4058 * IMPORTANT: These parameters would possibly be out of sync by the time 4059 * the driver will use them. The synchronized view is currently 4060 * guaranteed only in certain callbacks. 4061 */ 4062 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4063 sdata->vif.bss_conf.sync_tsf = 4064 le64_to_cpu(mgmt->u.beacon.timestamp); 4065 sdata->vif.bss_conf.sync_device_ts = 4066 rx_status->device_timestamp; 4067 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4068 } 4069 4070 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 4071 return; 4072 ifmgd->beacon_crc = ncrc; 4073 ifmgd->beacon_crc_valid = true; 4074 4075 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4076 4077 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4078 rx_status->device_timestamp, 4079 &elems, true); 4080 4081 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4082 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 4083 elems.wmm_param_len, 4084 elems.mu_edca_param_set)) 4085 changed |= BSS_CHANGED_QOS; 4086 4087 /* 4088 * If we haven't had a beacon before, tell the driver about the 4089 * DTIM period (and beacon timing if desired) now. 4090 */ 4091 if (!ifmgd->have_beacon) { 4092 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4093 bss_conf->dtim_period = elems.dtim_period ?: 1; 4094 4095 changed |= BSS_CHANGED_BEACON_INFO; 4096 ifmgd->have_beacon = true; 4097 4098 mutex_lock(&local->iflist_mtx); 4099 ieee80211_recalc_ps(local); 4100 mutex_unlock(&local->iflist_mtx); 4101 4102 ieee80211_recalc_ps_vif(sdata); 4103 } 4104 4105 if (elems.erp_info) { 4106 erp_valid = true; 4107 erp_value = elems.erp_info[0]; 4108 } else { 4109 erp_valid = false; 4110 } 4111 changed |= ieee80211_handle_bss_capability(sdata, 4112 le16_to_cpu(mgmt->u.beacon.capab_info), 4113 erp_valid, erp_value); 4114 4115 mutex_lock(&local->sta_mtx); 4116 sta = sta_info_get(sdata, bssid); 4117 4118 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4119 4120 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem, 4121 elems.vht_cap_elem, elems.ht_operation, 4122 elems.vht_operation, elems.he_operation, 4123 bssid, &changed)) { 4124 mutex_unlock(&local->sta_mtx); 4125 sdata_info(sdata, 4126 "failed to follow AP %pM bandwidth change, disconnect\n", 4127 bssid); 4128 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4129 WLAN_REASON_DEAUTH_LEAVING, 4130 true, deauth_buf); 4131 ieee80211_report_disconnect(sdata, deauth_buf, 4132 sizeof(deauth_buf), true, 4133 WLAN_REASON_DEAUTH_LEAVING); 4134 return; 4135 } 4136 4137 if (sta && elems.opmode_notif) 4138 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4139 rx_status->band); 4140 mutex_unlock(&local->sta_mtx); 4141 4142 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4143 elems.country_elem, 4144 elems.country_elem_len, 4145 elems.pwr_constr_elem, 4146 elems.cisco_dtpc_elem); 4147 4148 ieee80211_bss_info_change_notify(sdata, changed); 4149 } 4150 4151 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4152 struct sk_buff *skb) 4153 { 4154 struct ieee80211_rx_status *rx_status; 4155 struct ieee80211_mgmt *mgmt; 4156 u16 fc; 4157 struct ieee802_11_elems elems; 4158 int ies_len; 4159 4160 rx_status = (struct ieee80211_rx_status *) skb->cb; 4161 mgmt = (struct ieee80211_mgmt *) skb->data; 4162 fc = le16_to_cpu(mgmt->frame_control); 4163 4164 sdata_lock(sdata); 4165 4166 switch (fc & IEEE80211_FCTL_STYPE) { 4167 case IEEE80211_STYPE_BEACON: 4168 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 4169 break; 4170 case IEEE80211_STYPE_PROBE_RESP: 4171 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4172 break; 4173 case IEEE80211_STYPE_AUTH: 4174 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4175 break; 4176 case IEEE80211_STYPE_DEAUTH: 4177 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4178 break; 4179 case IEEE80211_STYPE_DISASSOC: 4180 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4181 break; 4182 case IEEE80211_STYPE_ASSOC_RESP: 4183 case IEEE80211_STYPE_REASSOC_RESP: 4184 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4185 break; 4186 case IEEE80211_STYPE_ACTION: 4187 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4188 ies_len = skb->len - 4189 offsetof(struct ieee80211_mgmt, 4190 u.action.u.chan_switch.variable); 4191 4192 if (ies_len < 0) 4193 break; 4194 4195 /* CSA IE cannot be overridden, no need for BSSID */ 4196 ieee802_11_parse_elems( 4197 mgmt->u.action.u.chan_switch.variable, 4198 ies_len, true, &elems, mgmt->bssid, NULL); 4199 4200 if (elems.parse_error) 4201 break; 4202 4203 ieee80211_sta_process_chanswitch(sdata, 4204 rx_status->mactime, 4205 rx_status->device_timestamp, 4206 &elems, false); 4207 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4208 ies_len = skb->len - 4209 offsetof(struct ieee80211_mgmt, 4210 u.action.u.ext_chan_switch.variable); 4211 4212 if (ies_len < 0) 4213 break; 4214 4215 /* 4216 * extended CSA IE can't be overridden, no need for 4217 * BSSID 4218 */ 4219 ieee802_11_parse_elems( 4220 mgmt->u.action.u.ext_chan_switch.variable, 4221 ies_len, true, &elems, mgmt->bssid, NULL); 4222 4223 if (elems.parse_error) 4224 break; 4225 4226 /* for the handling code pretend this was also an IE */ 4227 elems.ext_chansw_ie = 4228 &mgmt->u.action.u.ext_chan_switch.data; 4229 4230 ieee80211_sta_process_chanswitch(sdata, 4231 rx_status->mactime, 4232 rx_status->device_timestamp, 4233 &elems, false); 4234 } 4235 break; 4236 } 4237 sdata_unlock(sdata); 4238 } 4239 4240 static void ieee80211_sta_timer(struct timer_list *t) 4241 { 4242 struct ieee80211_sub_if_data *sdata = 4243 from_timer(sdata, t, u.mgd.timer); 4244 4245 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4246 } 4247 4248 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4249 u8 *bssid, u8 reason, bool tx) 4250 { 4251 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4252 4253 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4254 tx, frame_buf); 4255 4256 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4257 reason); 4258 } 4259 4260 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4261 { 4262 struct ieee80211_local *local = sdata->local; 4263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4264 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4265 u32 tx_flags = 0; 4266 u16 trans = 1; 4267 u16 status = 0; 4268 u16 prepare_tx_duration = 0; 4269 4270 sdata_assert_lock(sdata); 4271 4272 if (WARN_ON_ONCE(!auth_data)) 4273 return -EINVAL; 4274 4275 auth_data->tries++; 4276 4277 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4278 sdata_info(sdata, "authentication with %pM timed out\n", 4279 auth_data->bss->bssid); 4280 4281 /* 4282 * Most likely AP is not in the range so remove the 4283 * bss struct for that AP. 4284 */ 4285 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4286 4287 return -ETIMEDOUT; 4288 } 4289 4290 if (auth_data->algorithm == WLAN_AUTH_SAE) 4291 prepare_tx_duration = 4292 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4293 4294 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4295 4296 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4297 auth_data->bss->bssid, auth_data->tries, 4298 IEEE80211_AUTH_MAX_TRIES); 4299 4300 auth_data->expected_transaction = 2; 4301 4302 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4303 trans = auth_data->sae_trans; 4304 status = auth_data->sae_status; 4305 auth_data->expected_transaction = trans; 4306 } 4307 4308 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4309 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4310 IEEE80211_TX_INTFL_MLME_CONN_TX; 4311 4312 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4313 auth_data->data, auth_data->data_len, 4314 auth_data->bss->bssid, 4315 auth_data->bss->bssid, NULL, 0, 0, 4316 tx_flags); 4317 4318 if (tx_flags == 0) { 4319 if (auth_data->algorithm == WLAN_AUTH_SAE) 4320 auth_data->timeout = jiffies + 4321 IEEE80211_AUTH_TIMEOUT_SAE; 4322 else 4323 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4324 } else { 4325 auth_data->timeout = 4326 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4327 } 4328 4329 auth_data->timeout_started = true; 4330 run_again(sdata, auth_data->timeout); 4331 4332 return 0; 4333 } 4334 4335 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4336 { 4337 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4338 struct ieee80211_local *local = sdata->local; 4339 4340 sdata_assert_lock(sdata); 4341 4342 assoc_data->tries++; 4343 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4344 sdata_info(sdata, "association with %pM timed out\n", 4345 assoc_data->bss->bssid); 4346 4347 /* 4348 * Most likely AP is not in the range so remove the 4349 * bss struct for that AP. 4350 */ 4351 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4352 4353 return -ETIMEDOUT; 4354 } 4355 4356 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4357 assoc_data->bss->bssid, assoc_data->tries, 4358 IEEE80211_ASSOC_MAX_TRIES); 4359 ieee80211_send_assoc(sdata); 4360 4361 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4362 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4363 assoc_data->timeout_started = true; 4364 run_again(sdata, assoc_data->timeout); 4365 } else { 4366 assoc_data->timeout = 4367 round_jiffies_up(jiffies + 4368 IEEE80211_ASSOC_TIMEOUT_LONG); 4369 assoc_data->timeout_started = true; 4370 run_again(sdata, assoc_data->timeout); 4371 } 4372 4373 return 0; 4374 } 4375 4376 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4377 __le16 fc, bool acked) 4378 { 4379 struct ieee80211_local *local = sdata->local; 4380 4381 sdata->u.mgd.status_fc = fc; 4382 sdata->u.mgd.status_acked = acked; 4383 sdata->u.mgd.status_received = true; 4384 4385 ieee80211_queue_work(&local->hw, &sdata->work); 4386 } 4387 4388 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4389 { 4390 struct ieee80211_local *local = sdata->local; 4391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4392 4393 sdata_lock(sdata); 4394 4395 if (ifmgd->status_received) { 4396 __le16 fc = ifmgd->status_fc; 4397 bool status_acked = ifmgd->status_acked; 4398 4399 ifmgd->status_received = false; 4400 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4401 if (status_acked) { 4402 if (ifmgd->auth_data->algorithm == 4403 WLAN_AUTH_SAE) 4404 ifmgd->auth_data->timeout = 4405 jiffies + 4406 IEEE80211_AUTH_TIMEOUT_SAE; 4407 else 4408 ifmgd->auth_data->timeout = 4409 jiffies + 4410 IEEE80211_AUTH_TIMEOUT_SHORT; 4411 run_again(sdata, ifmgd->auth_data->timeout); 4412 } else { 4413 ifmgd->auth_data->timeout = jiffies - 1; 4414 } 4415 ifmgd->auth_data->timeout_started = true; 4416 } else if (ifmgd->assoc_data && 4417 (ieee80211_is_assoc_req(fc) || 4418 ieee80211_is_reassoc_req(fc))) { 4419 if (status_acked) { 4420 ifmgd->assoc_data->timeout = 4421 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4422 run_again(sdata, ifmgd->assoc_data->timeout); 4423 } else { 4424 ifmgd->assoc_data->timeout = jiffies - 1; 4425 } 4426 ifmgd->assoc_data->timeout_started = true; 4427 } 4428 } 4429 4430 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4431 time_after(jiffies, ifmgd->auth_data->timeout)) { 4432 if (ifmgd->auth_data->done) { 4433 /* 4434 * ok ... we waited for assoc but userspace didn't, 4435 * so let's just kill the auth data 4436 */ 4437 ieee80211_destroy_auth_data(sdata, false); 4438 } else if (ieee80211_auth(sdata)) { 4439 u8 bssid[ETH_ALEN]; 4440 struct ieee80211_event event = { 4441 .type = MLME_EVENT, 4442 .u.mlme.data = AUTH_EVENT, 4443 .u.mlme.status = MLME_TIMEOUT, 4444 }; 4445 4446 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4447 4448 ieee80211_destroy_auth_data(sdata, false); 4449 4450 cfg80211_auth_timeout(sdata->dev, bssid); 4451 drv_event_callback(sdata->local, sdata, &event); 4452 } 4453 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4454 run_again(sdata, ifmgd->auth_data->timeout); 4455 4456 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4457 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4458 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4459 ieee80211_do_assoc(sdata)) { 4460 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4461 struct ieee80211_event event = { 4462 .type = MLME_EVENT, 4463 .u.mlme.data = ASSOC_EVENT, 4464 .u.mlme.status = MLME_TIMEOUT, 4465 }; 4466 4467 ieee80211_destroy_assoc_data(sdata, false, false); 4468 cfg80211_assoc_timeout(sdata->dev, bss); 4469 drv_event_callback(sdata->local, sdata, &event); 4470 } 4471 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4472 run_again(sdata, ifmgd->assoc_data->timeout); 4473 4474 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4475 ifmgd->associated) { 4476 u8 bssid[ETH_ALEN]; 4477 int max_tries; 4478 4479 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4480 4481 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4482 max_tries = max_nullfunc_tries; 4483 else 4484 max_tries = max_probe_tries; 4485 4486 /* ACK received for nullfunc probing frame */ 4487 if (!ifmgd->probe_send_count) 4488 ieee80211_reset_ap_probe(sdata); 4489 else if (ifmgd->nullfunc_failed) { 4490 if (ifmgd->probe_send_count < max_tries) { 4491 mlme_dbg(sdata, 4492 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4493 bssid, ifmgd->probe_send_count, 4494 max_tries); 4495 ieee80211_mgd_probe_ap_send(sdata); 4496 } else { 4497 mlme_dbg(sdata, 4498 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4499 bssid); 4500 ieee80211_sta_connection_lost(sdata, bssid, 4501 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4502 false); 4503 } 4504 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4505 run_again(sdata, ifmgd->probe_timeout); 4506 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4507 mlme_dbg(sdata, 4508 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4509 bssid, probe_wait_ms); 4510 ieee80211_sta_connection_lost(sdata, bssid, 4511 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4512 } else if (ifmgd->probe_send_count < max_tries) { 4513 mlme_dbg(sdata, 4514 "No probe response from AP %pM after %dms, try %d/%i\n", 4515 bssid, probe_wait_ms, 4516 ifmgd->probe_send_count, max_tries); 4517 ieee80211_mgd_probe_ap_send(sdata); 4518 } else { 4519 /* 4520 * We actually lost the connection ... or did we? 4521 * Let's make sure! 4522 */ 4523 mlme_dbg(sdata, 4524 "No probe response from AP %pM after %dms, disconnecting.\n", 4525 bssid, probe_wait_ms); 4526 4527 ieee80211_sta_connection_lost(sdata, bssid, 4528 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4529 } 4530 } 4531 4532 sdata_unlock(sdata); 4533 } 4534 4535 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4536 { 4537 struct ieee80211_sub_if_data *sdata = 4538 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4540 4541 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4542 return; 4543 4544 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4545 return; 4546 4547 sdata->u.mgd.connection_loss = false; 4548 ieee80211_queue_work(&sdata->local->hw, 4549 &sdata->u.mgd.beacon_connection_loss_work); 4550 } 4551 4552 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4553 { 4554 struct ieee80211_sub_if_data *sdata = 4555 from_timer(sdata, t, u.mgd.conn_mon_timer); 4556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4557 struct ieee80211_local *local = sdata->local; 4558 struct sta_info *sta; 4559 unsigned long timeout; 4560 4561 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4562 return; 4563 4564 sta = sta_info_get(sdata, ifmgd->bssid); 4565 if (!sta) 4566 return; 4567 4568 timeout = sta->status_stats.last_ack; 4569 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4570 timeout = sta->rx_stats.last_rx; 4571 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4572 4573 if (time_is_before_jiffies(timeout)) { 4574 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4575 return; 4576 } 4577 4578 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4579 } 4580 4581 static void ieee80211_sta_monitor_work(struct work_struct *work) 4582 { 4583 struct ieee80211_sub_if_data *sdata = 4584 container_of(work, struct ieee80211_sub_if_data, 4585 u.mgd.monitor_work); 4586 4587 ieee80211_mgd_probe_ap(sdata, false); 4588 } 4589 4590 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4591 { 4592 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4593 __ieee80211_stop_poll(sdata); 4594 4595 /* let's probe the connection once */ 4596 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4597 ieee80211_queue_work(&sdata->local->hw, 4598 &sdata->u.mgd.monitor_work); 4599 } 4600 } 4601 4602 #ifdef CONFIG_PM 4603 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4604 { 4605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4606 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4607 4608 sdata_lock(sdata); 4609 4610 if (ifmgd->auth_data || ifmgd->assoc_data) { 4611 const u8 *bssid = ifmgd->auth_data ? 4612 ifmgd->auth_data->bss->bssid : 4613 ifmgd->assoc_data->bss->bssid; 4614 4615 /* 4616 * If we are trying to authenticate / associate while suspending, 4617 * cfg80211 won't know and won't actually abort those attempts, 4618 * thus we need to do that ourselves. 4619 */ 4620 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4621 IEEE80211_STYPE_DEAUTH, 4622 WLAN_REASON_DEAUTH_LEAVING, 4623 false, frame_buf); 4624 if (ifmgd->assoc_data) 4625 ieee80211_destroy_assoc_data(sdata, false, true); 4626 if (ifmgd->auth_data) 4627 ieee80211_destroy_auth_data(sdata, false); 4628 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4629 IEEE80211_DEAUTH_FRAME_LEN); 4630 } 4631 4632 /* This is a bit of a hack - we should find a better and more generic 4633 * solution to this. Normally when suspending, cfg80211 will in fact 4634 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4635 * auth (not so important) or assoc (this is the problem) process. 4636 * 4637 * As a consequence, it can happen that we are in the process of both 4638 * associating and suspending, and receive an association response 4639 * after cfg80211 has checked if it needs to disconnect, but before 4640 * we actually set the flag to drop incoming frames. This will then 4641 * cause the workqueue flush to process the association response in 4642 * the suspend, resulting in a successful association just before it 4643 * tries to remove the interface from the driver, which now though 4644 * has a channel context assigned ... this results in issues. 4645 * 4646 * To work around this (for now) simply deauth here again if we're 4647 * now connected. 4648 */ 4649 if (ifmgd->associated && !sdata->local->wowlan) { 4650 u8 bssid[ETH_ALEN]; 4651 struct cfg80211_deauth_request req = { 4652 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4653 .bssid = bssid, 4654 }; 4655 4656 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4657 ieee80211_mgd_deauth(sdata, &req); 4658 } 4659 4660 sdata_unlock(sdata); 4661 } 4662 4663 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4664 { 4665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4666 4667 sdata_lock(sdata); 4668 if (!ifmgd->associated) { 4669 sdata_unlock(sdata); 4670 return; 4671 } 4672 4673 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4674 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4675 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4676 ieee80211_sta_connection_lost(sdata, 4677 ifmgd->associated->bssid, 4678 WLAN_REASON_UNSPECIFIED, 4679 true); 4680 sdata_unlock(sdata); 4681 return; 4682 } 4683 sdata_unlock(sdata); 4684 } 4685 #endif 4686 4687 /* interface setup */ 4688 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4689 { 4690 struct ieee80211_if_managed *ifmgd; 4691 4692 ifmgd = &sdata->u.mgd; 4693 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4694 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4695 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4696 ieee80211_beacon_connection_loss_work); 4697 INIT_WORK(&ifmgd->csa_connection_drop_work, 4698 ieee80211_csa_connection_drop_work); 4699 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4700 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4701 ieee80211_tdls_peer_del_work); 4702 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4703 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4704 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4705 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4706 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4707 ieee80211_sta_handle_tspec_ac_params_wk); 4708 4709 ifmgd->flags = 0; 4710 ifmgd->powersave = sdata->wdev.ps; 4711 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4712 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4713 ifmgd->p2p_noa_index = -1; 4714 4715 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4716 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4717 else 4718 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4719 4720 /* Setup TDLS data */ 4721 spin_lock_init(&ifmgd->teardown_lock); 4722 ifmgd->teardown_skb = NULL; 4723 ifmgd->orig_teardown_skb = NULL; 4724 } 4725 4726 /* scan finished notification */ 4727 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4728 { 4729 struct ieee80211_sub_if_data *sdata; 4730 4731 /* Restart STA timers */ 4732 rcu_read_lock(); 4733 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4734 if (ieee80211_sdata_running(sdata)) 4735 ieee80211_restart_sta_timer(sdata); 4736 } 4737 rcu_read_unlock(); 4738 } 4739 4740 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4741 struct cfg80211_bss *cbss) 4742 { 4743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4744 const u8 *ht_cap_ie, *vht_cap_ie; 4745 const struct ieee80211_ht_cap *ht_cap; 4746 const struct ieee80211_vht_cap *vht_cap; 4747 u8 chains = 1; 4748 4749 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4750 return chains; 4751 4752 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4753 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4754 ht_cap = (void *)(ht_cap_ie + 2); 4755 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4756 /* 4757 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4758 * "Tx Unequal Modulation Supported" fields. 4759 */ 4760 } 4761 4762 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4763 return chains; 4764 4765 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4766 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4767 u8 nss; 4768 u16 tx_mcs_map; 4769 4770 vht_cap = (void *)(vht_cap_ie + 2); 4771 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4772 for (nss = 8; nss > 0; nss--) { 4773 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4774 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4775 break; 4776 } 4777 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4778 chains = max(chains, nss); 4779 } 4780 4781 return chains; 4782 } 4783 4784 static bool 4785 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4786 const struct ieee80211_he_operation *he_op) 4787 { 4788 const struct ieee80211_sta_he_cap *sta_he_cap = 4789 ieee80211_get_he_sta_cap(sband); 4790 u16 ap_min_req_set; 4791 int i; 4792 4793 if (!sta_he_cap || !he_op) 4794 return false; 4795 4796 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4797 4798 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4799 for (i = 0; i < 3; i++) { 4800 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4801 &sta_he_cap->he_mcs_nss_supp; 4802 u16 sta_mcs_map_rx = 4803 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4804 u16 sta_mcs_map_tx = 4805 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4806 u8 nss; 4807 bool verified = true; 4808 4809 /* 4810 * For each band there is a maximum of 8 spatial streams 4811 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4812 * of 2 bits per NSS (1-8), with the values defined in enum 4813 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4814 * capabilities aren't less than the AP's minimum requirements 4815 * for this HE BSS per SS. 4816 * It is enough to find one such band that meets the reqs. 4817 */ 4818 for (nss = 8; nss > 0; nss--) { 4819 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4820 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4821 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4822 4823 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4824 continue; 4825 4826 /* 4827 * Make sure the HE AP doesn't require MCSs that aren't 4828 * supported by the client 4829 */ 4830 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4831 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4832 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4833 verified = false; 4834 break; 4835 } 4836 } 4837 4838 if (verified) 4839 return true; 4840 } 4841 4842 /* If here, STA doesn't meet AP's HE min requirements */ 4843 return false; 4844 } 4845 4846 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4847 struct cfg80211_bss *cbss) 4848 { 4849 struct ieee80211_local *local = sdata->local; 4850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4851 const struct ieee80211_ht_cap *ht_cap = NULL; 4852 const struct ieee80211_ht_operation *ht_oper = NULL; 4853 const struct ieee80211_vht_operation *vht_oper = NULL; 4854 const struct ieee80211_he_operation *he_oper = NULL; 4855 struct ieee80211_supported_band *sband; 4856 struct cfg80211_chan_def chandef; 4857 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4858 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4859 struct ieee80211_bss *bss = (void *)cbss->priv; 4860 int ret; 4861 u32 i; 4862 bool have_80mhz; 4863 4864 sband = local->hw.wiphy->bands[cbss->channel->band]; 4865 4866 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4867 IEEE80211_STA_DISABLE_80P80MHZ | 4868 IEEE80211_STA_DISABLE_160MHZ); 4869 4870 /* disable HT/VHT/HE if we don't support them */ 4871 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4872 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4873 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4874 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4875 } 4876 4877 if (!sband->vht_cap.vht_supported && is_5ghz) { 4878 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4879 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4880 } 4881 4882 if (!ieee80211_get_he_sta_cap(sband)) 4883 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4884 4885 rcu_read_lock(); 4886 4887 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 4888 const u8 *ht_oper_ie, *ht_cap_ie; 4889 4890 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4891 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4892 ht_oper = (void *)(ht_oper_ie + 2); 4893 4894 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4895 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4896 ht_cap = (void *)(ht_cap_ie + 2); 4897 4898 if (!ht_cap) { 4899 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4900 ht_oper = NULL; 4901 } 4902 } 4903 4904 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 4905 const u8 *vht_oper_ie, *vht_cap; 4906 4907 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4908 WLAN_EID_VHT_OPERATION); 4909 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4910 vht_oper = (void *)(vht_oper_ie + 2); 4911 if (vht_oper && !ht_oper) { 4912 vht_oper = NULL; 4913 sdata_info(sdata, 4914 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4915 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4916 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4917 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4918 } 4919 4920 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4921 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4922 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4923 vht_oper = NULL; 4924 } 4925 } 4926 4927 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 4928 const struct cfg80211_bss_ies *ies; 4929 const u8 *he_oper_ie; 4930 4931 ies = rcu_dereference(cbss->ies); 4932 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4933 ies->data, ies->len); 4934 if (he_oper_ie && 4935 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4936 he_oper = (void *)(he_oper_ie + 3); 4937 else 4938 he_oper = NULL; 4939 4940 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4941 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4942 } 4943 4944 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4945 have_80mhz = false; 4946 for (i = 0; i < sband->n_channels; i++) { 4947 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4948 IEEE80211_CHAN_NO_80MHZ)) 4949 continue; 4950 4951 have_80mhz = true; 4952 break; 4953 } 4954 4955 if (!have_80mhz) 4956 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4957 4958 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4959 cbss->channel, 4960 bss->vht_cap_info, 4961 ht_oper, vht_oper, he_oper, 4962 &chandef, false); 4963 4964 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4965 local->rx_chains); 4966 4967 rcu_read_unlock(); 4968 4969 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 4970 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4971 return -EINVAL; 4972 } 4973 4974 /* will change later if needed */ 4975 sdata->smps_mode = IEEE80211_SMPS_OFF; 4976 4977 mutex_lock(&local->mtx); 4978 /* 4979 * If this fails (possibly due to channel context sharing 4980 * on incompatible channels, e.g. 80+80 and 160 sharing the 4981 * same control channel) try to use a smaller bandwidth. 4982 */ 4983 ret = ieee80211_vif_use_channel(sdata, &chandef, 4984 IEEE80211_CHANCTX_SHARED); 4985 4986 /* don't downgrade for 5 and 10 MHz channels, though. */ 4987 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4988 chandef.width == NL80211_CHAN_WIDTH_10) 4989 goto out; 4990 4991 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4992 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4993 ret = ieee80211_vif_use_channel(sdata, &chandef, 4994 IEEE80211_CHANCTX_SHARED); 4995 } 4996 out: 4997 mutex_unlock(&local->mtx); 4998 return ret; 4999 } 5000 5001 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5002 u8 *dtim_count, u8 *dtim_period) 5003 { 5004 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5005 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5006 ies->len); 5007 const struct ieee80211_tim_ie *tim = NULL; 5008 const struct ieee80211_bssid_index *idx; 5009 bool valid = tim_ie && tim_ie[1] >= 2; 5010 5011 if (valid) 5012 tim = (void *)(tim_ie + 2); 5013 5014 if (dtim_count) 5015 *dtim_count = valid ? tim->dtim_count : 0; 5016 5017 if (dtim_period) 5018 *dtim_period = valid ? tim->dtim_period : 0; 5019 5020 /* Check if value is overridden by non-transmitted profile */ 5021 if (!idx_ie || idx_ie[1] < 3) 5022 return valid; 5023 5024 idx = (void *)(idx_ie + 2); 5025 5026 if (dtim_count) 5027 *dtim_count = idx->dtim_count; 5028 5029 if (dtim_period) 5030 *dtim_period = idx->dtim_period; 5031 5032 return true; 5033 } 5034 5035 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5036 struct cfg80211_bss *cbss, bool assoc, 5037 bool override) 5038 { 5039 struct ieee80211_local *local = sdata->local; 5040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5041 struct ieee80211_bss *bss = (void *)cbss->priv; 5042 struct sta_info *new_sta = NULL; 5043 struct ieee80211_supported_band *sband; 5044 bool have_sta = false; 5045 int err; 5046 5047 sband = local->hw.wiphy->bands[cbss->channel->band]; 5048 5049 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5050 return -EINVAL; 5051 5052 /* If a reconfig is happening, bail out */ 5053 if (local->in_reconfig) 5054 return -EBUSY; 5055 5056 if (assoc) { 5057 rcu_read_lock(); 5058 have_sta = sta_info_get(sdata, cbss->bssid); 5059 rcu_read_unlock(); 5060 } 5061 5062 if (!have_sta) { 5063 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5064 if (!new_sta) 5065 return -ENOMEM; 5066 } 5067 5068 /* 5069 * Set up the information for the new channel before setting the 5070 * new channel. We can't - completely race-free - change the basic 5071 * rates bitmap and the channel (sband) that it refers to, but if 5072 * we set it up before we at least avoid calling into the driver's 5073 * bss_info_changed() method with invalid information (since we do 5074 * call that from changing the channel - only for IDLE and perhaps 5075 * some others, but ...). 5076 * 5077 * So to avoid that, just set up all the new information before the 5078 * channel, but tell the driver to apply it only afterwards, since 5079 * it might need the new channel for that. 5080 */ 5081 if (new_sta) { 5082 u32 rates = 0, basic_rates = 0; 5083 bool have_higher_than_11mbit; 5084 int min_rate = INT_MAX, min_rate_index = -1; 5085 const struct cfg80211_bss_ies *ies; 5086 int shift = ieee80211_vif_get_shift(&sdata->vif); 5087 5088 ieee80211_get_rates(sband, bss->supp_rates, 5089 bss->supp_rates_len, 5090 &rates, &basic_rates, 5091 &have_higher_than_11mbit, 5092 &min_rate, &min_rate_index, 5093 shift); 5094 5095 /* 5096 * This used to be a workaround for basic rates missing 5097 * in the association response frame. Now that we no 5098 * longer use the basic rates from there, it probably 5099 * doesn't happen any more, but keep the workaround so 5100 * in case some *other* APs are buggy in different ways 5101 * we can connect -- with a warning. 5102 * Allow this workaround only in case the AP provided at least 5103 * one rate. 5104 */ 5105 if (min_rate_index < 0) { 5106 sdata_info(sdata, 5107 "No legacy rates in association response\n"); 5108 5109 sta_info_free(local, new_sta); 5110 return -EINVAL; 5111 } else if (!basic_rates) { 5112 sdata_info(sdata, 5113 "No basic rates, using min rate instead\n"); 5114 basic_rates = BIT(min_rate_index); 5115 } 5116 5117 if (rates) 5118 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5119 else 5120 sdata_info(sdata, 5121 "No rates found, keeping mandatory only\n"); 5122 5123 sdata->vif.bss_conf.basic_rates = basic_rates; 5124 5125 /* cf. IEEE 802.11 9.2.12 */ 5126 if (cbss->channel->band == NL80211_BAND_2GHZ && 5127 have_higher_than_11mbit) 5128 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5129 else 5130 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5131 5132 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5133 5134 /* set timing information */ 5135 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5136 rcu_read_lock(); 5137 ies = rcu_dereference(cbss->beacon_ies); 5138 if (ies) { 5139 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5140 sdata->vif.bss_conf.sync_device_ts = 5141 bss->device_ts_beacon; 5142 5143 ieee80211_get_dtim(ies, 5144 &sdata->vif.bss_conf.sync_dtim_count, 5145 NULL); 5146 } else if (!ieee80211_hw_check(&sdata->local->hw, 5147 TIMING_BEACON_ONLY)) { 5148 ies = rcu_dereference(cbss->proberesp_ies); 5149 /* must be non-NULL since beacon IEs were NULL */ 5150 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5151 sdata->vif.bss_conf.sync_device_ts = 5152 bss->device_ts_presp; 5153 sdata->vif.bss_conf.sync_dtim_count = 0; 5154 } else { 5155 sdata->vif.bss_conf.sync_tsf = 0; 5156 sdata->vif.bss_conf.sync_device_ts = 0; 5157 sdata->vif.bss_conf.sync_dtim_count = 0; 5158 } 5159 rcu_read_unlock(); 5160 } 5161 5162 if (new_sta || override) { 5163 err = ieee80211_prep_channel(sdata, cbss); 5164 if (err) { 5165 if (new_sta) 5166 sta_info_free(local, new_sta); 5167 return -EINVAL; 5168 } 5169 } 5170 5171 if (new_sta) { 5172 /* 5173 * tell driver about BSSID, basic rates and timing 5174 * this was set up above, before setting the channel 5175 */ 5176 ieee80211_bss_info_change_notify(sdata, 5177 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5178 BSS_CHANGED_BEACON_INT); 5179 5180 if (assoc) 5181 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5182 5183 err = sta_info_insert(new_sta); 5184 new_sta = NULL; 5185 if (err) { 5186 sdata_info(sdata, 5187 "failed to insert STA entry for the AP (error %d)\n", 5188 err); 5189 return err; 5190 } 5191 } else 5192 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5193 5194 /* Cancel scan to ensure that nothing interferes with connection */ 5195 if (local->scanning) 5196 ieee80211_scan_cancel(local); 5197 5198 return 0; 5199 } 5200 5201 /* config hooks */ 5202 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5203 struct cfg80211_auth_request *req) 5204 { 5205 struct ieee80211_local *local = sdata->local; 5206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5207 struct ieee80211_mgd_auth_data *auth_data; 5208 u16 auth_alg; 5209 int err; 5210 bool cont_auth; 5211 5212 /* prepare auth data structure */ 5213 5214 switch (req->auth_type) { 5215 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5216 auth_alg = WLAN_AUTH_OPEN; 5217 break; 5218 case NL80211_AUTHTYPE_SHARED_KEY: 5219 if (fips_enabled) 5220 return -EOPNOTSUPP; 5221 auth_alg = WLAN_AUTH_SHARED_KEY; 5222 break; 5223 case NL80211_AUTHTYPE_FT: 5224 auth_alg = WLAN_AUTH_FT; 5225 break; 5226 case NL80211_AUTHTYPE_NETWORK_EAP: 5227 auth_alg = WLAN_AUTH_LEAP; 5228 break; 5229 case NL80211_AUTHTYPE_SAE: 5230 auth_alg = WLAN_AUTH_SAE; 5231 break; 5232 case NL80211_AUTHTYPE_FILS_SK: 5233 auth_alg = WLAN_AUTH_FILS_SK; 5234 break; 5235 case NL80211_AUTHTYPE_FILS_SK_PFS: 5236 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5237 break; 5238 case NL80211_AUTHTYPE_FILS_PK: 5239 auth_alg = WLAN_AUTH_FILS_PK; 5240 break; 5241 default: 5242 return -EOPNOTSUPP; 5243 } 5244 5245 if (ifmgd->assoc_data) 5246 return -EBUSY; 5247 5248 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5249 req->ie_len, GFP_KERNEL); 5250 if (!auth_data) 5251 return -ENOMEM; 5252 5253 auth_data->bss = req->bss; 5254 5255 if (req->auth_data_len >= 4) { 5256 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5257 __le16 *pos = (__le16 *) req->auth_data; 5258 5259 auth_data->sae_trans = le16_to_cpu(pos[0]); 5260 auth_data->sae_status = le16_to_cpu(pos[1]); 5261 } 5262 memcpy(auth_data->data, req->auth_data + 4, 5263 req->auth_data_len - 4); 5264 auth_data->data_len += req->auth_data_len - 4; 5265 } 5266 5267 /* Check if continuing authentication or trying to authenticate with the 5268 * same BSS that we were in the process of authenticating with and avoid 5269 * removal and re-addition of the STA entry in 5270 * ieee80211_prep_connection(). 5271 */ 5272 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5273 5274 if (req->ie && req->ie_len) { 5275 memcpy(&auth_data->data[auth_data->data_len], 5276 req->ie, req->ie_len); 5277 auth_data->data_len += req->ie_len; 5278 } 5279 5280 if (req->key && req->key_len) { 5281 auth_data->key_len = req->key_len; 5282 auth_data->key_idx = req->key_idx; 5283 memcpy(auth_data->key, req->key, req->key_len); 5284 } 5285 5286 auth_data->algorithm = auth_alg; 5287 5288 /* try to authenticate/probe */ 5289 5290 if (ifmgd->auth_data) { 5291 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5292 auth_data->peer_confirmed = 5293 ifmgd->auth_data->peer_confirmed; 5294 } 5295 ieee80211_destroy_auth_data(sdata, cont_auth); 5296 } 5297 5298 /* prep auth_data so we don't go into idle on disassoc */ 5299 ifmgd->auth_data = auth_data; 5300 5301 /* If this is continuation of an ongoing SAE authentication exchange 5302 * (i.e., request to send SAE Confirm) and the peer has already 5303 * confirmed, mark authentication completed since we are about to send 5304 * out SAE Confirm. 5305 */ 5306 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5307 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5308 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5309 5310 if (ifmgd->associated) { 5311 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5312 5313 sdata_info(sdata, 5314 "disconnect from AP %pM for new auth to %pM\n", 5315 ifmgd->associated->bssid, req->bss->bssid); 5316 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5317 WLAN_REASON_UNSPECIFIED, 5318 false, frame_buf); 5319 5320 ieee80211_report_disconnect(sdata, frame_buf, 5321 sizeof(frame_buf), true, 5322 WLAN_REASON_UNSPECIFIED); 5323 } 5324 5325 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5326 5327 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5328 if (err) 5329 goto err_clear; 5330 5331 err = ieee80211_auth(sdata); 5332 if (err) { 5333 sta_info_destroy_addr(sdata, req->bss->bssid); 5334 goto err_clear; 5335 } 5336 5337 /* hold our own reference */ 5338 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5339 return 0; 5340 5341 err_clear: 5342 eth_zero_addr(ifmgd->bssid); 5343 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5344 ifmgd->auth_data = NULL; 5345 mutex_lock(&sdata->local->mtx); 5346 ieee80211_vif_release_channel(sdata); 5347 mutex_unlock(&sdata->local->mtx); 5348 kfree(auth_data); 5349 return err; 5350 } 5351 5352 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5353 struct cfg80211_assoc_request *req) 5354 { 5355 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5356 struct ieee80211_local *local = sdata->local; 5357 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5358 struct ieee80211_bss *bss = (void *)req->bss->priv; 5359 struct ieee80211_mgd_assoc_data *assoc_data; 5360 const struct cfg80211_bss_ies *beacon_ies; 5361 struct ieee80211_supported_band *sband; 5362 const u8 *ssidie, *ht_ie, *vht_ie; 5363 int i, err; 5364 bool override = false; 5365 5366 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5367 if (!assoc_data) 5368 return -ENOMEM; 5369 5370 rcu_read_lock(); 5371 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5372 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5373 rcu_read_unlock(); 5374 kfree(assoc_data); 5375 return -EINVAL; 5376 } 5377 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5378 assoc_data->ssid_len = ssidie[1]; 5379 rcu_read_unlock(); 5380 5381 if (ifmgd->associated) { 5382 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5383 5384 sdata_info(sdata, 5385 "disconnect from AP %pM for new assoc to %pM\n", 5386 ifmgd->associated->bssid, req->bss->bssid); 5387 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5388 WLAN_REASON_UNSPECIFIED, 5389 false, frame_buf); 5390 5391 ieee80211_report_disconnect(sdata, frame_buf, 5392 sizeof(frame_buf), true, 5393 WLAN_REASON_UNSPECIFIED); 5394 } 5395 5396 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5397 err = -EBUSY; 5398 goto err_free; 5399 } 5400 5401 if (ifmgd->assoc_data) { 5402 err = -EBUSY; 5403 goto err_free; 5404 } 5405 5406 if (ifmgd->auth_data) { 5407 bool match; 5408 5409 /* keep sta info, bssid if matching */ 5410 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5411 ieee80211_destroy_auth_data(sdata, match); 5412 } 5413 5414 /* prepare assoc data */ 5415 5416 ifmgd->beacon_crc_valid = false; 5417 5418 assoc_data->wmm = bss->wmm_used && 5419 (local->hw.queues >= IEEE80211_NUM_ACS); 5420 5421 /* 5422 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5423 * We still associate in non-HT mode (11a/b/g) if any one of these 5424 * ciphers is configured as pairwise. 5425 * We can set this to true for non-11n hardware, that'll be checked 5426 * separately along with the peer capabilities. 5427 */ 5428 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5429 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5430 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5431 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5432 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5433 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5434 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5435 netdev_info(sdata->dev, 5436 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5437 } 5438 } 5439 5440 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5441 5442 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5443 if (!bss->wmm_used) { 5444 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5445 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5446 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5447 netdev_info(sdata->dev, 5448 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5449 } 5450 5451 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5452 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5453 sizeof(ifmgd->ht_capa_mask)); 5454 5455 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5456 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5457 sizeof(ifmgd->vht_capa_mask)); 5458 5459 if (req->ie && req->ie_len) { 5460 memcpy(assoc_data->ie, req->ie, req->ie_len); 5461 assoc_data->ie_len = req->ie_len; 5462 } 5463 5464 if (req->fils_kek) { 5465 /* should already be checked in cfg80211 - so warn */ 5466 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5467 err = -EINVAL; 5468 goto err_free; 5469 } 5470 memcpy(assoc_data->fils_kek, req->fils_kek, 5471 req->fils_kek_len); 5472 assoc_data->fils_kek_len = req->fils_kek_len; 5473 } 5474 5475 if (req->fils_nonces) 5476 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5477 2 * FILS_NONCE_LEN); 5478 5479 assoc_data->bss = req->bss; 5480 5481 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5482 if (ifmgd->powersave) 5483 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5484 else 5485 sdata->smps_mode = IEEE80211_SMPS_OFF; 5486 } else 5487 sdata->smps_mode = ifmgd->req_smps; 5488 5489 assoc_data->capability = req->bss->capability; 5490 assoc_data->supp_rates = bss->supp_rates; 5491 assoc_data->supp_rates_len = bss->supp_rates_len; 5492 5493 rcu_read_lock(); 5494 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5495 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5496 assoc_data->ap_ht_param = 5497 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5498 else if (!is_6ghz) 5499 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5500 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5501 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5502 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5503 sizeof(struct ieee80211_vht_cap)); 5504 else if (!is_6ghz) 5505 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5506 IEEE80211_STA_DISABLE_HE; 5507 rcu_read_unlock(); 5508 5509 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5510 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5511 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5512 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5513 5514 if (bss->wmm_used && bss->uapsd_supported && 5515 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5516 assoc_data->uapsd = true; 5517 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5518 } else { 5519 assoc_data->uapsd = false; 5520 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5521 } 5522 5523 if (req->prev_bssid) 5524 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5525 5526 if (req->use_mfp) { 5527 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5528 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5529 } else { 5530 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5531 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5532 } 5533 5534 if (req->flags & ASSOC_REQ_USE_RRM) 5535 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5536 else 5537 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5538 5539 if (req->crypto.control_port) 5540 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5541 else 5542 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5543 5544 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5545 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5546 sdata->control_port_over_nl80211 = 5547 req->crypto.control_port_over_nl80211; 5548 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5549 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5550 sdata->vif.type); 5551 5552 /* kick off associate process */ 5553 5554 ifmgd->assoc_data = assoc_data; 5555 ifmgd->dtim_period = 0; 5556 ifmgd->have_beacon = false; 5557 5558 /* override HT/VHT configuration only if the AP and we support it */ 5559 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5560 struct ieee80211_sta_ht_cap sta_ht_cap; 5561 5562 if (req->flags & ASSOC_REQ_DISABLE_HT) 5563 override = true; 5564 5565 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5566 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5567 5568 /* check for 40 MHz disable override */ 5569 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5570 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5571 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5572 override = true; 5573 5574 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5575 req->flags & ASSOC_REQ_DISABLE_VHT) 5576 override = true; 5577 } 5578 5579 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5580 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5581 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5582 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5583 } 5584 5585 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5586 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5587 5588 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5589 if (err) 5590 goto err_clear; 5591 5592 rcu_read_lock(); 5593 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5594 5595 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5596 !beacon_ies) { 5597 /* 5598 * Wait up to one beacon interval ... 5599 * should this be more if we miss one? 5600 */ 5601 sdata_info(sdata, "waiting for beacon from %pM\n", 5602 ifmgd->bssid); 5603 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5604 assoc_data->timeout_started = true; 5605 assoc_data->need_beacon = true; 5606 } else if (beacon_ies) { 5607 const struct element *elem; 5608 u8 dtim_count = 0; 5609 5610 ieee80211_get_dtim(beacon_ies, &dtim_count, 5611 &ifmgd->dtim_period); 5612 5613 ifmgd->have_beacon = true; 5614 assoc_data->timeout = jiffies; 5615 assoc_data->timeout_started = true; 5616 5617 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5618 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5619 sdata->vif.bss_conf.sync_device_ts = 5620 bss->device_ts_beacon; 5621 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5622 } 5623 5624 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5625 beacon_ies->data, beacon_ies->len); 5626 if (elem && elem->datalen >= 3) 5627 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5628 5629 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5630 beacon_ies->data, beacon_ies->len); 5631 if (elem && elem->datalen >= 11 && 5632 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5633 sdata->vif.bss_conf.ema_ap = true; 5634 } else { 5635 assoc_data->timeout = jiffies; 5636 assoc_data->timeout_started = true; 5637 } 5638 rcu_read_unlock(); 5639 5640 run_again(sdata, assoc_data->timeout); 5641 5642 if (bss->corrupt_data) { 5643 char *corrupt_type = "data"; 5644 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5645 if (bss->corrupt_data & 5646 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5647 corrupt_type = "beacon and probe response"; 5648 else 5649 corrupt_type = "beacon"; 5650 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5651 corrupt_type = "probe response"; 5652 sdata_info(sdata, "associating with AP with corrupt %s\n", 5653 corrupt_type); 5654 } 5655 5656 return 0; 5657 err_clear: 5658 eth_zero_addr(ifmgd->bssid); 5659 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5660 ifmgd->assoc_data = NULL; 5661 err_free: 5662 kfree(assoc_data); 5663 return err; 5664 } 5665 5666 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5667 struct cfg80211_deauth_request *req) 5668 { 5669 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5670 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5671 bool tx = !req->local_state_change; 5672 5673 if (ifmgd->auth_data && 5674 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5675 sdata_info(sdata, 5676 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5677 req->bssid, req->reason_code, 5678 ieee80211_get_reason_code_string(req->reason_code)); 5679 5680 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5681 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5682 IEEE80211_STYPE_DEAUTH, 5683 req->reason_code, tx, 5684 frame_buf); 5685 ieee80211_destroy_auth_data(sdata, false); 5686 ieee80211_report_disconnect(sdata, frame_buf, 5687 sizeof(frame_buf), true, 5688 req->reason_code); 5689 5690 return 0; 5691 } 5692 5693 if (ifmgd->assoc_data && 5694 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5695 sdata_info(sdata, 5696 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5697 req->bssid, req->reason_code, 5698 ieee80211_get_reason_code_string(req->reason_code)); 5699 5700 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5701 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5702 IEEE80211_STYPE_DEAUTH, 5703 req->reason_code, tx, 5704 frame_buf); 5705 ieee80211_destroy_assoc_data(sdata, false, true); 5706 ieee80211_report_disconnect(sdata, frame_buf, 5707 sizeof(frame_buf), true, 5708 req->reason_code); 5709 return 0; 5710 } 5711 5712 if (ifmgd->associated && 5713 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5714 sdata_info(sdata, 5715 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5716 req->bssid, req->reason_code, 5717 ieee80211_get_reason_code_string(req->reason_code)); 5718 5719 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5720 req->reason_code, tx, frame_buf); 5721 ieee80211_report_disconnect(sdata, frame_buf, 5722 sizeof(frame_buf), true, 5723 req->reason_code); 5724 return 0; 5725 } 5726 5727 return -ENOTCONN; 5728 } 5729 5730 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5731 struct cfg80211_disassoc_request *req) 5732 { 5733 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5734 u8 bssid[ETH_ALEN]; 5735 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5736 5737 /* 5738 * cfg80211 should catch this ... but it's racy since 5739 * we can receive a disassoc frame, process it, hand it 5740 * to cfg80211 while that's in a locked section already 5741 * trying to tell us that the user wants to disconnect. 5742 */ 5743 if (ifmgd->associated != req->bss) 5744 return -ENOLINK; 5745 5746 sdata_info(sdata, 5747 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5748 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5749 5750 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5751 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5752 req->reason_code, !req->local_state_change, 5753 frame_buf); 5754 5755 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5756 req->reason_code); 5757 5758 return 0; 5759 } 5760 5761 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5762 { 5763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5764 5765 /* 5766 * Make sure some work items will not run after this, 5767 * they will not do anything but might not have been 5768 * cancelled when disconnecting. 5769 */ 5770 cancel_work_sync(&ifmgd->monitor_work); 5771 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5772 cancel_work_sync(&ifmgd->request_smps_work); 5773 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5774 cancel_work_sync(&ifmgd->chswitch_work); 5775 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5776 5777 sdata_lock(sdata); 5778 if (ifmgd->assoc_data) { 5779 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5780 ieee80211_destroy_assoc_data(sdata, false, false); 5781 cfg80211_assoc_timeout(sdata->dev, bss); 5782 } 5783 if (ifmgd->auth_data) 5784 ieee80211_destroy_auth_data(sdata, false); 5785 spin_lock_bh(&ifmgd->teardown_lock); 5786 if (ifmgd->teardown_skb) { 5787 kfree_skb(ifmgd->teardown_skb); 5788 ifmgd->teardown_skb = NULL; 5789 ifmgd->orig_teardown_skb = NULL; 5790 } 5791 kfree(ifmgd->assoc_req_ies); 5792 ifmgd->assoc_req_ies = NULL; 5793 ifmgd->assoc_req_ies_len = 0; 5794 spin_unlock_bh(&ifmgd->teardown_lock); 5795 del_timer_sync(&ifmgd->timer); 5796 sdata_unlock(sdata); 5797 } 5798 5799 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5800 enum nl80211_cqm_rssi_threshold_event rssi_event, 5801 s32 rssi_level, 5802 gfp_t gfp) 5803 { 5804 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5805 5806 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5807 5808 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5809 } 5810 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5811 5812 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5813 { 5814 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5815 5816 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5817 5818 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5819 } 5820 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5821