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