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 - 2024 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_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 48 49 static int max_nullfunc_tries = 2; 50 module_param(max_nullfunc_tries, int, 0644); 51 MODULE_PARM_DESC(max_nullfunc_tries, 52 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 53 54 static int max_probe_tries = 5; 55 module_param(max_probe_tries, int, 0644); 56 MODULE_PARM_DESC(max_probe_tries, 57 "Maximum probe tries before disconnecting (reason 4)."); 58 59 /* 60 * Beacon loss timeout is calculated as N frames times the 61 * advertised beacon interval. This may need to be somewhat 62 * higher than what hardware might detect to account for 63 * delays in the host processing frames. But since we also 64 * probe on beacon miss before declaring the connection lost 65 * default to what we want. 66 */ 67 static int beacon_loss_count = 7; 68 module_param(beacon_loss_count, int, 0644); 69 MODULE_PARM_DESC(beacon_loss_count, 70 "Number of beacon intervals before we decide beacon was lost."); 71 72 /* 73 * Time the connection can be idle before we probe 74 * it to see if we can still talk to the AP. 75 */ 76 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 77 /* 78 * Time we wait for a probe response after sending 79 * a probe request because of beacon loss or for 80 * checking the connection still works. 81 */ 82 static int probe_wait_ms = 500; 83 module_param(probe_wait_ms, int, 0644); 84 MODULE_PARM_DESC(probe_wait_ms, 85 "Maximum time(ms) to wait for probe response" 86 " before disconnecting (reason 4)."); 87 88 /* 89 * How many Beacon frames need to have been used in average signal strength 90 * before starting to indicate signal change events. 91 */ 92 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 93 94 /* 95 * Extract from the given disabled subchannel bitmap (raw format 96 * from the EHT Operation Element) the bits for the subchannel 97 * we're using right now. 98 */ 99 static u16 100 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, 101 struct cfg80211_chan_def *chandef, u16 bitmap) 102 { 103 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 104 struct cfg80211_chan_def ap_chandef = *chandef; 105 u32 ap_center_freq, local_center_freq; 106 u32 ap_bw, local_bw; 107 int ap_start_freq, local_start_freq; 108 u16 shift, mask; 109 110 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || 111 !(eht_oper->params & 112 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) 113 return 0; 114 115 /* set 160/320 supported to get the full AP definition */ 116 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 117 true, true, &ap_chandef); 118 ap_center_freq = ap_chandef.center_freq1; 119 ap_bw = 20 * BIT(u8_get_bits(info->control, 120 IEEE80211_EHT_OPER_CHAN_WIDTH)); 121 ap_start_freq = ap_center_freq - ap_bw / 2; 122 local_center_freq = chandef->center_freq1; 123 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 124 local_start_freq = local_center_freq - local_bw / 2; 125 shift = (local_start_freq - ap_start_freq) / 20; 126 mask = BIT(local_bw / 20) - 1; 127 128 return (bitmap >> shift) & mask; 129 } 130 131 /* 132 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 133 * valid bitmap. 134 */ 135 static void 136 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 137 const struct ieee80211_eht_operation *eht_oper, 138 u16 bitmap, u64 *changed) 139 { 140 struct cfg80211_chan_def *chandef = &link->conf->chandef; 141 struct ieee80211_local *local = link->sdata->local; 142 u16 extracted; 143 u64 _changed = 0; 144 145 if (!changed) 146 changed = &_changed; 147 148 while (chandef->width > NL80211_CHAN_WIDTH_40) { 149 extracted = 150 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 151 bitmap); 152 153 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 154 chandef) && 155 !(bitmap && ieee80211_hw_check(&local->hw, 156 DISALLOW_PUNCTURING))) 157 break; 158 link->u.mgd.conn_flags |= 159 ieee80211_chandef_downgrade(chandef); 160 *changed |= BSS_CHANGED_BANDWIDTH; 161 } 162 163 if (chandef->width <= NL80211_CHAN_WIDTH_40) 164 extracted = 0; 165 166 if (link->conf->eht_puncturing != extracted) { 167 link->conf->eht_puncturing = extracted; 168 *changed |= BSS_CHANGED_EHT_PUNCTURING; 169 } 170 } 171 172 /* 173 * We can have multiple work items (and connection probing) 174 * scheduling this timer, but we need to take care to only 175 * reschedule it when it should fire _earlier_ than it was 176 * asked for before, or if it's not pending right now. This 177 * function ensures that. Note that it then is required to 178 * run this function for all timeouts after the first one 179 * has happened -- the work that runs from this timer will 180 * do that. 181 */ 182 static void run_again(struct ieee80211_sub_if_data *sdata, 183 unsigned long timeout) 184 { 185 lockdep_assert_wiphy(sdata->local->hw.wiphy); 186 187 if (!timer_pending(&sdata->u.mgd.timer) || 188 time_before(timeout, sdata->u.mgd.timer.expires)) 189 mod_timer(&sdata->u.mgd.timer, timeout); 190 } 191 192 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 193 { 194 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 195 return; 196 197 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 198 return; 199 200 mod_timer(&sdata->u.mgd.bcn_mon_timer, 201 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 202 } 203 204 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 205 { 206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 207 208 if (unlikely(!ifmgd->associated)) 209 return; 210 211 if (ifmgd->probe_send_count) 212 ifmgd->probe_send_count = 0; 213 214 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 215 return; 216 217 mod_timer(&ifmgd->conn_mon_timer, 218 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 219 } 220 221 static int ecw2cw(int ecw) 222 { 223 return (1 << ecw) - 1; 224 } 225 226 static ieee80211_conn_flags_t 227 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 228 struct ieee80211_link_data *link, 229 ieee80211_conn_flags_t conn_flags, 230 struct ieee80211_supported_band *sband, 231 struct ieee80211_channel *channel, 232 u32 vht_cap_info, 233 const struct ieee80211_ht_operation *ht_oper, 234 const struct ieee80211_vht_operation *vht_oper, 235 const struct ieee80211_he_operation *he_oper, 236 const struct ieee80211_eht_operation *eht_oper, 237 const struct ieee80211_s1g_oper_ie *s1g_oper, 238 struct cfg80211_chan_def *chandef, bool tracking) 239 { 240 struct cfg80211_chan_def vht_chandef; 241 struct ieee80211_sta_ht_cap sta_ht_cap; 242 ieee80211_conn_flags_t ret; 243 u32 ht_cfreq; 244 245 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 246 chandef->chan = channel; 247 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 248 chandef->center_freq1 = channel->center_freq; 249 chandef->freq1_offset = channel->freq_offset; 250 251 if (channel->band == NL80211_BAND_6GHZ) { 252 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 253 chandef)) { 254 mlme_dbg(sdata, 255 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 256 ret = IEEE80211_CONN_DISABLE_HT | 257 IEEE80211_CONN_DISABLE_VHT | 258 IEEE80211_CONN_DISABLE_HE | 259 IEEE80211_CONN_DISABLE_EHT; 260 } else { 261 ret = 0; 262 } 263 vht_chandef = *chandef; 264 goto out; 265 } else if (sband->band == NL80211_BAND_S1GHZ) { 266 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 267 sdata_info(sdata, 268 "Missing S1G Operation Element? Trying operating == primary\n"); 269 chandef->width = ieee80211_s1g_channel_width(channel); 270 } 271 272 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 273 IEEE80211_CONN_DISABLE_VHT | 274 IEEE80211_CONN_DISABLE_80P80MHZ | 275 IEEE80211_CONN_DISABLE_160MHZ; 276 goto out; 277 } 278 279 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 280 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 281 282 if (!ht_oper || !sta_ht_cap.ht_supported) { 283 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 284 ret = IEEE80211_CONN_DISABLE_HT | 285 IEEE80211_CONN_DISABLE_VHT | 286 IEEE80211_CONN_DISABLE_HE | 287 IEEE80211_CONN_DISABLE_EHT; 288 goto out; 289 } 290 291 chandef->width = NL80211_CHAN_WIDTH_20; 292 293 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 294 channel->band); 295 /* check that channel matches the right operating channel */ 296 if (!tracking && channel->center_freq != ht_cfreq) { 297 /* 298 * It's possible that some APs are confused here; 299 * Netgear WNDR3700 sometimes reports 4 higher than 300 * the actual channel in association responses, but 301 * since we look at probe response/beacon data here 302 * it should be OK. 303 */ 304 sdata_info(sdata, 305 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 306 channel->center_freq, ht_cfreq, 307 ht_oper->primary_chan, channel->band); 308 ret = IEEE80211_CONN_DISABLE_HT | 309 IEEE80211_CONN_DISABLE_VHT | 310 IEEE80211_CONN_DISABLE_HE | 311 IEEE80211_CONN_DISABLE_EHT; 312 goto out; 313 } 314 315 /* check 40 MHz support, if we have it */ 316 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 317 ieee80211_chandef_ht_oper(ht_oper, chandef); 318 } else { 319 mlme_dbg(sdata, "40 MHz not supported\n"); 320 /* 40 MHz (and 80 MHz) must be supported for VHT */ 321 ret = IEEE80211_CONN_DISABLE_VHT; 322 /* also mark 40 MHz disabled */ 323 ret |= IEEE80211_CONN_DISABLE_40MHZ; 324 goto out; 325 } 326 327 if (!vht_oper || !sband->vht_cap.vht_supported) { 328 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 329 ret = IEEE80211_CONN_DISABLE_VHT; 330 goto out; 331 } 332 333 vht_chandef = *chandef; 334 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 335 he_oper && 336 (le32_to_cpu(he_oper->he_oper_params) & 337 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 338 struct ieee80211_vht_operation he_oper_vht_cap; 339 340 /* 341 * Set only first 3 bytes (other 2 aren't used in 342 * ieee80211_chandef_vht_oper() anyway) 343 */ 344 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 345 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 346 347 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 348 &he_oper_vht_cap, ht_oper, 349 &vht_chandef)) { 350 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 351 sdata_info(sdata, 352 "HE AP VHT information is invalid, disabling HE\n"); 353 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 354 goto out; 355 } 356 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 357 vht_cap_info, 358 vht_oper, ht_oper, 359 &vht_chandef)) { 360 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 361 sdata_info(sdata, 362 "AP VHT information is invalid, disabling VHT\n"); 363 ret = IEEE80211_CONN_DISABLE_VHT; 364 goto out; 365 } 366 367 if (!cfg80211_chandef_valid(&vht_chandef)) { 368 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 369 sdata_info(sdata, 370 "AP VHT information is invalid, disabling VHT\n"); 371 ret = IEEE80211_CONN_DISABLE_VHT; 372 goto out; 373 } 374 375 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 376 ret = 0; 377 goto out; 378 } 379 380 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 381 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 382 sdata_info(sdata, 383 "AP VHT information doesn't match HT, disabling VHT\n"); 384 ret = IEEE80211_CONN_DISABLE_VHT; 385 goto out; 386 } 387 388 *chandef = vht_chandef; 389 390 /* 391 * handle the case that the EHT operation indicates that it holds EHT 392 * operation information (in case that the channel width differs from 393 * the channel width reported in HT/VHT/HE). 394 */ 395 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 396 struct cfg80211_chan_def eht_chandef = *chandef; 397 398 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 399 eht_chandef.width == 400 NL80211_CHAN_WIDTH_160, 401 false, &eht_chandef); 402 403 if (!cfg80211_chandef_valid(&eht_chandef)) { 404 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 405 sdata_info(sdata, 406 "AP EHT information is invalid, disabling EHT\n"); 407 ret = IEEE80211_CONN_DISABLE_EHT; 408 goto out; 409 } 410 411 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 412 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 413 sdata_info(sdata, 414 "AP EHT information is incompatible, disabling EHT\n"); 415 ret = IEEE80211_CONN_DISABLE_EHT; 416 goto out; 417 } 418 419 *chandef = eht_chandef; 420 } 421 422 ret = 0; 423 424 out: 425 /* 426 * When tracking the current AP, don't do any further checks if the 427 * new chandef is identical to the one we're currently using for the 428 * connection. This keeps us from playing ping-pong with regulatory, 429 * without it the following can happen (for example): 430 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 431 * - AP advertises regdom US 432 * - CRDA loads regdom US with 80 MHz prohibited (old database) 433 * - the code below detects an unsupported channel, downgrades, and 434 * we disconnect from the AP in the caller 435 * - disconnect causes CRDA to reload world regdomain and the game 436 * starts anew. 437 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 438 * 439 * It seems possible that there are still scenarios with CSA or real 440 * bandwidth changes where a this could happen, but those cases are 441 * less common and wouldn't completely prevent using the AP. 442 */ 443 if (tracking && 444 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 445 return ret; 446 447 /* don't print the message below for VHT mismatch if VHT is disabled */ 448 if (ret & IEEE80211_CONN_DISABLE_VHT) 449 vht_chandef = *chandef; 450 451 /* 452 * Ignore the DISABLED flag when we're already connected and only 453 * tracking the APs beacon for bandwidth changes - otherwise we 454 * might get disconnected here if we connect to an AP, update our 455 * regulatory information based on the AP's country IE and the 456 * information we have is wrong/outdated and disables the channel 457 * that we're actually using for the connection to the AP. 458 */ 459 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 460 tracking ? 0 : 461 IEEE80211_CHAN_DISABLED)) { 462 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 463 ret = IEEE80211_CONN_DISABLE_HT | 464 IEEE80211_CONN_DISABLE_VHT | 465 IEEE80211_CONN_DISABLE_HE | 466 IEEE80211_CONN_DISABLE_EHT; 467 break; 468 } 469 470 ret |= ieee80211_chandef_downgrade(chandef); 471 } 472 473 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 474 IEEE80211_CHAN_NO_HE)) 475 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 476 477 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 478 IEEE80211_CHAN_NO_EHT)) 479 ret |= IEEE80211_CONN_DISABLE_EHT; 480 481 if (chandef->width != vht_chandef.width && !tracking) 482 sdata_info(sdata, 483 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 484 485 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 486 return ret; 487 } 488 489 static int ieee80211_config_bw(struct ieee80211_link_data *link, 490 const struct ieee80211_ht_cap *ht_cap, 491 const struct ieee80211_vht_cap *vht_cap, 492 const struct ieee80211_ht_operation *ht_oper, 493 const struct ieee80211_vht_operation *vht_oper, 494 const struct ieee80211_he_operation *he_oper, 495 const struct ieee80211_eht_operation *eht_oper, 496 const struct ieee80211_s1g_oper_ie *s1g_oper, 497 const u8 *bssid, u64 *changed) 498 { 499 struct ieee80211_sub_if_data *sdata = link->sdata; 500 struct ieee80211_local *local = sdata->local; 501 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 502 struct ieee80211_channel *chan = link->conf->chandef.chan; 503 struct ieee80211_supported_band *sband = 504 local->hw.wiphy->bands[chan->band]; 505 struct cfg80211_chan_def chandef; 506 u16 ht_opmode; 507 ieee80211_conn_flags_t flags; 508 u32 vht_cap_info = 0; 509 int ret; 510 511 /* if HT was/is disabled, don't track any bandwidth changes */ 512 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 513 return 0; 514 515 /* don't check VHT if we associated as non-VHT station */ 516 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 517 vht_oper = NULL; 518 519 /* don't check HE if we associated as non-HE station */ 520 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 521 !ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 522 he_oper = NULL; 523 eht_oper = NULL; 524 } 525 526 /* don't check EHT if we associated as non-EHT station */ 527 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 528 !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) 529 eht_oper = NULL; 530 531 /* 532 * if bss configuration changed store the new one - 533 * this may be applicable even if channel is identical 534 */ 535 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 536 if (link->conf->ht_operation_mode != ht_opmode) { 537 *changed |= BSS_CHANGED_HT; 538 link->conf->ht_operation_mode = ht_opmode; 539 } 540 541 if (vht_cap) 542 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 543 544 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 545 flags = ieee80211_determine_chantype(sdata, link, 546 link->u.mgd.conn_flags, 547 sband, chan, vht_cap_info, 548 ht_oper, vht_oper, 549 he_oper, eht_oper, 550 s1g_oper, &chandef, true); 551 552 /* 553 * Downgrade the new channel if we associated with restricted 554 * capabilities. For example, if we associated as a 20 MHz STA 555 * to a 40 MHz AP (due to regulatory, capabilities or config 556 * reasons) then switching to a 40 MHz channel now won't do us 557 * any good -- we couldn't use it with the AP. 558 */ 559 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 560 chandef.width == NL80211_CHAN_WIDTH_80P80) 561 flags |= ieee80211_chandef_downgrade(&chandef); 562 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 563 chandef.width == NL80211_CHAN_WIDTH_160) 564 flags |= ieee80211_chandef_downgrade(&chandef); 565 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 566 chandef.width > NL80211_CHAN_WIDTH_20) 567 flags |= ieee80211_chandef_downgrade(&chandef); 568 569 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 570 return 0; 571 572 link_info(link, 573 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 574 link->u.mgd.bssid, chandef.chan->center_freq, 575 chandef.chan->freq_offset, chandef.width, 576 chandef.center_freq1, chandef.freq1_offset, 577 chandef.center_freq2); 578 579 if (flags != (link->u.mgd.conn_flags & 580 (IEEE80211_CONN_DISABLE_HT | 581 IEEE80211_CONN_DISABLE_VHT | 582 IEEE80211_CONN_DISABLE_HE | 583 IEEE80211_CONN_DISABLE_EHT | 584 IEEE80211_CONN_DISABLE_40MHZ | 585 IEEE80211_CONN_DISABLE_80P80MHZ | 586 IEEE80211_CONN_DISABLE_160MHZ | 587 IEEE80211_CONN_DISABLE_320MHZ)) || 588 !cfg80211_chandef_valid(&chandef)) { 589 sdata_info(sdata, 590 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 591 link->u.mgd.bssid, flags, ifmgd->flags); 592 return -EINVAL; 593 } 594 595 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 596 597 if (ret) { 598 sdata_info(sdata, 599 "AP %pM changed bandwidth to incompatible one - disconnect\n", 600 link->u.mgd.bssid); 601 return ret; 602 } 603 604 cfg80211_schedule_channels_check(&sdata->wdev); 605 return 0; 606 } 607 608 /* frame sending functions */ 609 610 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 611 struct sk_buff *skb, u8 ap_ht_param, 612 struct ieee80211_supported_band *sband, 613 struct ieee80211_channel *channel, 614 enum ieee80211_smps_mode smps, 615 ieee80211_conn_flags_t conn_flags) 616 { 617 u8 *pos; 618 u32 flags = channel->flags; 619 u16 cap; 620 struct ieee80211_sta_ht_cap ht_cap; 621 622 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 623 624 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 625 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 626 627 /* determine capability flags */ 628 cap = ht_cap.cap; 629 630 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 631 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 632 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 633 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 634 cap &= ~IEEE80211_HT_CAP_SGI_40; 635 } 636 break; 637 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 638 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 639 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 640 cap &= ~IEEE80211_HT_CAP_SGI_40; 641 } 642 break; 643 } 644 645 /* 646 * If 40 MHz was disabled associate as though we weren't 647 * capable of 40 MHz -- some broken APs will never fall 648 * back to trying to transmit in 20 MHz. 649 */ 650 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 651 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 652 cap &= ~IEEE80211_HT_CAP_SGI_40; 653 } 654 655 /* set SM PS mode properly */ 656 cap &= ~IEEE80211_HT_CAP_SM_PS; 657 switch (smps) { 658 case IEEE80211_SMPS_AUTOMATIC: 659 case IEEE80211_SMPS_NUM_MODES: 660 WARN_ON(1); 661 fallthrough; 662 case IEEE80211_SMPS_OFF: 663 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 664 IEEE80211_HT_CAP_SM_PS_SHIFT; 665 break; 666 case IEEE80211_SMPS_STATIC: 667 cap |= WLAN_HT_CAP_SM_PS_STATIC << 668 IEEE80211_HT_CAP_SM_PS_SHIFT; 669 break; 670 case IEEE80211_SMPS_DYNAMIC: 671 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 672 IEEE80211_HT_CAP_SM_PS_SHIFT; 673 break; 674 } 675 676 /* reserve and fill IE */ 677 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 678 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 679 } 680 681 /* This function determines vht capability flags for the association 682 * and builds the IE. 683 * Note - the function returns true to own the MU-MIMO capability 684 */ 685 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 686 struct sk_buff *skb, 687 struct ieee80211_supported_band *sband, 688 struct ieee80211_vht_cap *ap_vht_cap, 689 ieee80211_conn_flags_t conn_flags) 690 { 691 struct ieee80211_local *local = sdata->local; 692 u8 *pos; 693 u32 cap; 694 struct ieee80211_sta_vht_cap vht_cap; 695 u32 mask, ap_bf_sts, our_bf_sts; 696 bool mu_mimo_owner = false; 697 698 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 699 700 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 701 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 702 703 /* determine capability flags */ 704 cap = vht_cap.cap; 705 706 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 707 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 708 709 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 710 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 711 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 712 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 713 } 714 715 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 716 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 717 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 718 } 719 720 /* 721 * Some APs apparently get confused if our capabilities are better 722 * than theirs, so restrict what we advertise in the assoc request. 723 */ 724 if (!(ap_vht_cap->vht_cap_info & 725 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 726 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 727 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 728 else if (!(ap_vht_cap->vht_cap_info & 729 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 730 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 731 732 /* 733 * If some other vif is using the MU-MIMO capability we cannot associate 734 * using MU-MIMO - this will lead to contradictions in the group-id 735 * mechanism. 736 * Ownership is defined since association request, in order to avoid 737 * simultaneous associations with MU-MIMO. 738 */ 739 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 740 bool disable_mu_mimo = false; 741 struct ieee80211_sub_if_data *other; 742 743 list_for_each_entry_rcu(other, &local->interfaces, list) { 744 if (other->vif.bss_conf.mu_mimo_owner) { 745 disable_mu_mimo = true; 746 break; 747 } 748 } 749 if (disable_mu_mimo) 750 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 751 else 752 mu_mimo_owner = true; 753 } 754 755 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 756 757 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 758 our_bf_sts = cap & mask; 759 760 if (ap_bf_sts < our_bf_sts) { 761 cap &= ~mask; 762 cap |= ap_bf_sts; 763 } 764 765 /* reserve and fill IE */ 766 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 767 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 768 769 return mu_mimo_owner; 770 } 771 772 /* This function determines HE capability flags for the association 773 * and builds the IE. 774 */ 775 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 776 struct sk_buff *skb, 777 struct ieee80211_supported_band *sband, 778 enum ieee80211_smps_mode smps_mode, 779 ieee80211_conn_flags_t conn_flags) 780 { 781 u8 *pos, *pre_he_pos; 782 const struct ieee80211_sta_he_cap *he_cap; 783 u8 he_cap_size; 784 785 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 786 if (WARN_ON(!he_cap)) 787 return; 788 789 /* get a max size estimate */ 790 he_cap_size = 791 2 + 1 + sizeof(he_cap->he_cap_elem) + 792 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 793 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 794 he_cap->he_cap_elem.phy_cap_info); 795 pos = skb_put(skb, he_cap_size); 796 pre_he_pos = pos; 797 pos = ieee80211_ie_build_he_cap(conn_flags, 798 pos, he_cap, pos + he_cap_size); 799 /* trim excess if any */ 800 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 801 802 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 803 } 804 805 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 806 struct sk_buff *skb, 807 struct ieee80211_supported_band *sband) 808 { 809 u8 *pos; 810 const struct ieee80211_sta_he_cap *he_cap; 811 const struct ieee80211_sta_eht_cap *eht_cap; 812 u8 eht_cap_size; 813 814 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 815 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 816 817 /* 818 * EHT capabilities element is only added if the HE capabilities element 819 * was added so assume that 'he_cap' is valid and don't check it. 820 */ 821 if (WARN_ON(!he_cap || !eht_cap)) 822 return; 823 824 eht_cap_size = 825 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 826 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 827 &eht_cap->eht_cap_elem, 828 false) + 829 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 830 eht_cap->eht_cap_elem.phy_cap_info); 831 pos = skb_put(skb, eht_cap_size); 832 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 833 false); 834 } 835 836 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 837 enum nl80211_chan_width width, 838 struct ieee80211_supported_band *sband, 839 struct ieee80211_mgd_assoc_data *assoc_data) 840 { 841 unsigned int rates_len, supp_rates_len; 842 u32 rates = 0; 843 int i, count; 844 u8 *pos; 845 846 if (assoc_data->supp_rates_len) { 847 /* 848 * Get all rates supported by the device and the AP as 849 * some APs don't like getting a superset of their rates 850 * in the association request (e.g. D-Link DAP 1353 in 851 * b-only mode)... 852 */ 853 rates_len = ieee80211_parse_bitrates(width, sband, 854 assoc_data->supp_rates, 855 assoc_data->supp_rates_len, 856 &rates); 857 } else { 858 /* 859 * In case AP not provide any supported rates information 860 * before association, we send information element(s) with 861 * all rates that we support. 862 */ 863 rates_len = sband->n_bitrates; 864 for (i = 0; i < sband->n_bitrates; i++) 865 rates |= BIT(i); 866 } 867 868 supp_rates_len = rates_len; 869 if (supp_rates_len > 8) 870 supp_rates_len = 8; 871 872 pos = skb_put(skb, supp_rates_len + 2); 873 *pos++ = WLAN_EID_SUPP_RATES; 874 *pos++ = supp_rates_len; 875 876 count = 0; 877 for (i = 0; i < sband->n_bitrates; i++) { 878 if (BIT(i) & rates) { 879 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 880 *pos++ = (u8)rate; 881 if (++count == 8) 882 break; 883 } 884 } 885 886 if (rates_len > count) { 887 pos = skb_put(skb, rates_len - count + 2); 888 *pos++ = WLAN_EID_EXT_SUPP_RATES; 889 *pos++ = rates_len - count; 890 891 for (i++; i < sband->n_bitrates; i++) { 892 if (BIT(i) & rates) { 893 int rate; 894 895 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 896 *pos++ = (u8)rate; 897 } 898 } 899 } 900 } 901 902 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 903 const u8 *elems, 904 size_t elems_len, 905 size_t offset) 906 { 907 size_t noffset; 908 909 static const u8 before_ht[] = { 910 WLAN_EID_SSID, 911 WLAN_EID_SUPP_RATES, 912 WLAN_EID_EXT_SUPP_RATES, 913 WLAN_EID_PWR_CAPABILITY, 914 WLAN_EID_SUPPORTED_CHANNELS, 915 WLAN_EID_RSN, 916 WLAN_EID_QOS_CAPA, 917 WLAN_EID_RRM_ENABLED_CAPABILITIES, 918 WLAN_EID_MOBILITY_DOMAIN, 919 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 920 WLAN_EID_RIC_DATA, /* reassoc only */ 921 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 922 }; 923 static const u8 after_ric[] = { 924 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 925 WLAN_EID_HT_CAPABILITY, 926 WLAN_EID_BSS_COEX_2040, 927 /* luckily this is almost always there */ 928 WLAN_EID_EXT_CAPABILITY, 929 WLAN_EID_QOS_TRAFFIC_CAPA, 930 WLAN_EID_TIM_BCAST_REQ, 931 WLAN_EID_INTERWORKING, 932 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 933 WLAN_EID_VHT_CAPABILITY, 934 WLAN_EID_OPMODE_NOTIF, 935 }; 936 937 if (!elems_len) 938 return offset; 939 940 noffset = ieee80211_ie_split_ric(elems, elems_len, 941 before_ht, 942 ARRAY_SIZE(before_ht), 943 after_ric, 944 ARRAY_SIZE(after_ric), 945 offset); 946 skb_put_data(skb, elems + offset, noffset - offset); 947 948 return noffset; 949 } 950 951 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 952 const u8 *elems, 953 size_t elems_len, 954 size_t offset) 955 { 956 static const u8 before_vht[] = { 957 /* 958 * no need to list the ones split off before HT 959 * or generated here 960 */ 961 WLAN_EID_BSS_COEX_2040, 962 WLAN_EID_EXT_CAPABILITY, 963 WLAN_EID_QOS_TRAFFIC_CAPA, 964 WLAN_EID_TIM_BCAST_REQ, 965 WLAN_EID_INTERWORKING, 966 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 967 }; 968 size_t noffset; 969 970 if (!elems_len) 971 return offset; 972 973 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 974 noffset = ieee80211_ie_split(elems, elems_len, 975 before_vht, ARRAY_SIZE(before_vht), 976 offset); 977 skb_put_data(skb, elems + offset, noffset - offset); 978 979 return noffset; 980 } 981 982 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 983 const u8 *elems, 984 size_t elems_len, 985 size_t offset) 986 { 987 static const u8 before_he[] = { 988 /* 989 * no need to list the ones split off before VHT 990 * or generated here 991 */ 992 WLAN_EID_OPMODE_NOTIF, 993 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 994 /* 11ai elements */ 995 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 996 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 997 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 998 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 999 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1000 /* TODO: add 11ah/11aj/11ak elements */ 1001 }; 1002 size_t noffset; 1003 1004 if (!elems_len) 1005 return offset; 1006 1007 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1008 noffset = ieee80211_ie_split(elems, elems_len, 1009 before_he, ARRAY_SIZE(before_he), 1010 offset); 1011 skb_put_data(skb, elems + offset, noffset - offset); 1012 1013 return noffset; 1014 } 1015 1016 #define PRESENT_ELEMS_MAX 8 1017 #define PRESENT_ELEM_EXT_OFFS 0x100 1018 1019 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1020 struct sk_buff *skb, u16 capab, 1021 const struct element *ext_capa, 1022 const u16 *present_elems); 1023 1024 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1025 struct sk_buff *skb, u16 *capab, 1026 const struct element *ext_capa, 1027 const u8 *extra_elems, 1028 size_t extra_elems_len, 1029 unsigned int link_id, 1030 struct ieee80211_link_data *link, 1031 u16 *present_elems) 1032 { 1033 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1035 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1036 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1037 struct ieee80211_channel *chan = cbss->channel; 1038 const struct ieee80211_sband_iftype_data *iftd; 1039 struct ieee80211_local *local = sdata->local; 1040 struct ieee80211_supported_band *sband; 1041 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1042 struct ieee80211_chanctx_conf *chanctx_conf; 1043 enum ieee80211_smps_mode smps_mode; 1044 u16 orig_capab = *capab; 1045 size_t offset = 0; 1046 int present_elems_len = 0; 1047 u8 *pos; 1048 int i; 1049 1050 #define ADD_PRESENT_ELEM(id) do { \ 1051 /* need a last for termination - we use 0 == SSID */ \ 1052 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1053 present_elems[present_elems_len++] = (id); \ 1054 } while (0) 1055 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1056 1057 if (link) 1058 smps_mode = link->smps_mode; 1059 else if (sdata->u.mgd.powersave) 1060 smps_mode = IEEE80211_SMPS_DYNAMIC; 1061 else 1062 smps_mode = IEEE80211_SMPS_OFF; 1063 1064 if (link) { 1065 /* 1066 * 5/10 MHz scenarios are only viable without MLO, in which 1067 * case this pointer should be used ... All of this is a bit 1068 * unclear though, not sure this even works at all. 1069 */ 1070 rcu_read_lock(); 1071 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1072 if (chanctx_conf) 1073 width = chanctx_conf->def.width; 1074 rcu_read_unlock(); 1075 } 1076 1077 sband = local->hw.wiphy->bands[chan->band]; 1078 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1079 1080 if (sband->band == NL80211_BAND_2GHZ) { 1081 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1082 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1083 } 1084 1085 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1086 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1087 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1088 1089 if (sband->band != NL80211_BAND_S1GHZ) 1090 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1091 1092 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1093 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1094 struct cfg80211_chan_def chandef = { 1095 .width = width, 1096 .chan = chan, 1097 }; 1098 1099 pos = skb_put(skb, 4); 1100 *pos++ = WLAN_EID_PWR_CAPABILITY; 1101 *pos++ = 2; 1102 *pos++ = 0; /* min tx power */ 1103 /* max tx power */ 1104 *pos++ = ieee80211_chandef_max_power(&chandef); 1105 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1106 } 1107 1108 /* 1109 * Per spec, we shouldn't include the list of channels if we advertise 1110 * support for extended channel switching, but we've always done that; 1111 * (for now?) apply this restriction only on the (new) 6 GHz band. 1112 */ 1113 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1114 (sband->band != NL80211_BAND_6GHZ || 1115 !ext_capa || ext_capa->datalen < 1 || 1116 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1117 /* TODO: get this in reg domain format */ 1118 pos = skb_put(skb, 2 * sband->n_channels + 2); 1119 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1120 *pos++ = 2 * sband->n_channels; 1121 for (i = 0; i < sband->n_channels; i++) { 1122 int cf = sband->channels[i].center_freq; 1123 1124 *pos++ = ieee80211_frequency_to_channel(cf); 1125 *pos++ = 1; /* one channel in the subband*/ 1126 } 1127 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1128 } 1129 1130 /* if present, add any custom IEs that go before HT */ 1131 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1132 extra_elems_len, 1133 offset); 1134 1135 if (sband->band != NL80211_BAND_6GHZ && 1136 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1137 ieee80211_add_ht_ie(sdata, skb, 1138 assoc_data->link[link_id].ap_ht_param, 1139 sband, chan, smps_mode, 1140 assoc_data->link[link_id].conn_flags); 1141 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1142 } 1143 1144 /* if present, add any custom IEs that go before VHT */ 1145 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1146 extra_elems_len, 1147 offset); 1148 1149 if (sband->band != NL80211_BAND_6GHZ && 1150 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1151 bool mu_mimo_owner = 1152 ieee80211_add_vht_ie(sdata, skb, sband, 1153 &assoc_data->link[link_id].ap_vht_cap, 1154 assoc_data->link[link_id].conn_flags); 1155 1156 if (link) 1157 link->conf->mu_mimo_owner = mu_mimo_owner; 1158 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1159 } 1160 1161 /* 1162 * If AP doesn't support HT, mark HE and EHT as disabled. 1163 * If on the 5GHz band, make sure it supports VHT. 1164 */ 1165 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1166 (sband->band == NL80211_BAND_5GHZ && 1167 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1168 assoc_data->link[link_id].conn_flags |= 1169 IEEE80211_CONN_DISABLE_HE | 1170 IEEE80211_CONN_DISABLE_EHT; 1171 1172 /* if present, add any custom IEs that go before HE */ 1173 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1174 extra_elems_len, 1175 offset); 1176 1177 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1178 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1179 assoc_data->link[link_id].conn_flags); 1180 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1181 } 1182 1183 /* 1184 * careful - need to know about all the present elems before 1185 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1186 * we're going to put it after the ML element 1187 */ 1188 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1189 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1190 1191 if (link_id == assoc_data->assoc_link_id) 1192 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1193 present_elems); 1194 1195 /* crash if somebody gets it wrong */ 1196 present_elems = NULL; 1197 1198 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1199 ieee80211_add_eht_ie(sdata, skb, sband); 1200 1201 if (sband->band == NL80211_BAND_S1GHZ) { 1202 ieee80211_add_aid_request_ie(sdata, skb); 1203 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1204 } 1205 1206 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1207 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1208 1209 if (link) 1210 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1211 1212 return offset; 1213 } 1214 1215 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1216 const u16 *outer, 1217 const u16 *inner) 1218 { 1219 unsigned int skb_len = skb->len; 1220 bool at_extension = false; 1221 bool added = false; 1222 int i, j; 1223 u8 *len, *list_len = NULL; 1224 1225 skb_put_u8(skb, WLAN_EID_EXTENSION); 1226 len = skb_put(skb, 1); 1227 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1228 1229 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1230 u16 elem = outer[i]; 1231 bool have_inner = false; 1232 1233 /* should at least be sorted in the sense of normal -> ext */ 1234 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1235 1236 /* switch to extension list */ 1237 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1238 at_extension = true; 1239 if (!list_len) 1240 skb_put_u8(skb, 0); 1241 list_len = NULL; 1242 } 1243 1244 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1245 if (elem == inner[j]) { 1246 have_inner = true; 1247 break; 1248 } 1249 } 1250 1251 if (have_inner) 1252 continue; 1253 1254 if (!list_len) { 1255 list_len = skb_put(skb, 1); 1256 *list_len = 0; 1257 } 1258 *list_len += 1; 1259 skb_put_u8(skb, (u8)elem); 1260 added = true; 1261 } 1262 1263 /* if we added a list but no extension list, make a zero-len one */ 1264 if (added && (!at_extension || !list_len)) 1265 skb_put_u8(skb, 0); 1266 1267 /* if nothing added remove extension element completely */ 1268 if (!added) 1269 skb_trim(skb, skb_len); 1270 else 1271 *len = skb->len - skb_len - 2; 1272 } 1273 1274 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1275 struct sk_buff *skb, u16 capab, 1276 const struct element *ext_capa, 1277 const u16 *outer_present_elems) 1278 { 1279 struct ieee80211_local *local = sdata->local; 1280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1281 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1282 struct ieee80211_multi_link_elem *ml_elem; 1283 struct ieee80211_mle_basic_common_info *common; 1284 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1285 __le16 eml_capa = 0, mld_capa_ops = 0; 1286 unsigned int link_id; 1287 u8 *ml_elem_len; 1288 void *capab_pos; 1289 1290 if (!ieee80211_vif_is_mld(&sdata->vif)) 1291 return; 1292 1293 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1294 ieee80211_vif_type_p2p(&sdata->vif)); 1295 if (ift_ext_capa) { 1296 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1297 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1298 } 1299 1300 skb_put_u8(skb, WLAN_EID_EXTENSION); 1301 ml_elem_len = skb_put(skb, 1); 1302 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1303 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1304 ml_elem->control = 1305 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1306 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1307 common = skb_put(skb, sizeof(*common)); 1308 common->len = sizeof(*common) + 1309 2; /* MLD capa/ops */ 1310 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1311 1312 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1313 if (eml_capa & 1314 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1315 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1316 common->len += 2; /* EML capabilities */ 1317 ml_elem->control |= 1318 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1319 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1320 } 1321 /* need indication from userspace to support this */ 1322 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1323 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1324 1325 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1326 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1327 const u8 *extra_elems; 1328 size_t extra_elems_len; 1329 size_t extra_used; 1330 u8 *subelem_len = NULL; 1331 __le16 ctrl; 1332 1333 if (!assoc_data->link[link_id].bss || 1334 link_id == assoc_data->assoc_link_id) 1335 continue; 1336 1337 extra_elems = assoc_data->link[link_id].elems; 1338 extra_elems_len = assoc_data->link[link_id].elems_len; 1339 1340 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1341 subelem_len = skb_put(skb, 1); 1342 1343 ctrl = cpu_to_le16(link_id | 1344 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1345 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1346 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1347 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1348 skb_put_data(skb, assoc_data->link[link_id].addr, 1349 ETH_ALEN); 1350 /* 1351 * Now add the contents of the (re)association request, 1352 * but the "listen interval" and "current AP address" 1353 * (if applicable) are skipped. So we only have 1354 * the capability field (remember the position and fill 1355 * later), followed by the elements added below by 1356 * calling ieee80211_assoc_link_elems(). 1357 */ 1358 capab_pos = skb_put(skb, 2); 1359 1360 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1361 ext_capa, 1362 extra_elems, 1363 extra_elems_len, 1364 link_id, NULL, 1365 link_present_elems); 1366 if (extra_elems) 1367 skb_put_data(skb, extra_elems + extra_used, 1368 extra_elems_len - extra_used); 1369 1370 put_unaligned_le16(capab, capab_pos); 1371 1372 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1373 link_present_elems); 1374 1375 ieee80211_fragment_element(skb, subelem_len, 1376 IEEE80211_MLE_SUBELEM_FRAGMENT); 1377 } 1378 1379 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1380 } 1381 1382 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1383 { 1384 struct ieee80211_local *local = sdata->local; 1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1386 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1387 struct ieee80211_link_data *link; 1388 struct sk_buff *skb; 1389 struct ieee80211_mgmt *mgmt; 1390 u8 *pos, qos_info, *ie_start; 1391 size_t offset, noffset; 1392 u16 capab = 0, link_capab; 1393 __le16 listen_int; 1394 struct element *ext_capa = NULL; 1395 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1396 struct ieee80211_prep_tx_info info = {}; 1397 unsigned int link_id, n_links = 0; 1398 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1399 void *capab_pos; 1400 size_t size; 1401 int ret; 1402 1403 /* we know it's writable, cast away the const */ 1404 if (assoc_data->ie_len) 1405 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1406 assoc_data->ie, 1407 assoc_data->ie_len); 1408 1409 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1410 1411 size = local->hw.extra_tx_headroom + 1412 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1413 2 + assoc_data->ssid_len + /* SSID */ 1414 assoc_data->ie_len + /* extra IEs */ 1415 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1416 9; /* WMM */ 1417 1418 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1419 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1420 const struct ieee80211_sband_iftype_data *iftd; 1421 struct ieee80211_supported_band *sband; 1422 1423 if (!cbss) 1424 continue; 1425 1426 sband = local->hw.wiphy->bands[cbss->channel->band]; 1427 1428 n_links++; 1429 /* add STA profile elements length */ 1430 size += assoc_data->link[link_id].elems_len; 1431 /* and supported rates length */ 1432 size += 4 + sband->n_bitrates; 1433 /* supported channels */ 1434 size += 2 + 2 * sband->n_channels; 1435 1436 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1437 if (iftd) 1438 size += iftd->vendor_elems.len; 1439 1440 /* power capability */ 1441 size += 4; 1442 1443 /* HT, VHT, HE, EHT */ 1444 size += 2 + sizeof(struct ieee80211_ht_cap); 1445 size += 2 + sizeof(struct ieee80211_vht_cap); 1446 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1447 sizeof(struct ieee80211_he_mcs_nss_supp) + 1448 IEEE80211_HE_PPE_THRES_MAX_LEN; 1449 1450 if (sband->band == NL80211_BAND_6GHZ) 1451 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1452 1453 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1454 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1455 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1456 1457 /* non-inheritance element */ 1458 size += 2 + 2 + PRESENT_ELEMS_MAX; 1459 1460 /* should be the same across all BSSes */ 1461 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1462 capab |= WLAN_CAPABILITY_PRIVACY; 1463 } 1464 1465 if (ieee80211_vif_is_mld(&sdata->vif)) { 1466 /* consider the multi-link element with STA profile */ 1467 size += sizeof(struct ieee80211_multi_link_elem); 1468 /* max common info field in basic multi-link element */ 1469 size += sizeof(struct ieee80211_mle_basic_common_info) + 1470 2 + /* capa & op */ 1471 2; /* EML capa */ 1472 1473 /* 1474 * The capability elements were already considered above; 1475 * note this over-estimates a bit because there's no 1476 * STA profile for the assoc link. 1477 */ 1478 size += (n_links - 1) * 1479 (1 + 1 + /* subelement ID/length */ 1480 2 + /* STA control */ 1481 1 + ETH_ALEN + 2 /* STA Info field */); 1482 } 1483 1484 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1485 if (WARN_ON(!link)) 1486 return -EINVAL; 1487 1488 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1489 return -EINVAL; 1490 1491 skb = alloc_skb(size, GFP_KERNEL); 1492 if (!skb) 1493 return -ENOMEM; 1494 1495 skb_reserve(skb, local->hw.extra_tx_headroom); 1496 1497 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1498 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1499 1500 /* Set MBSSID support for HE AP if needed */ 1501 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1502 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1503 ext_capa && ext_capa->datalen >= 3) 1504 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1505 1506 mgmt = skb_put_zero(skb, 24); 1507 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1508 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1509 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1510 1511 listen_int = cpu_to_le16(assoc_data->s1g ? 1512 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1513 local->hw.conf.listen_interval); 1514 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1515 skb_put(skb, 10); 1516 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1517 IEEE80211_STYPE_REASSOC_REQ); 1518 capab_pos = &mgmt->u.reassoc_req.capab_info; 1519 mgmt->u.reassoc_req.listen_interval = listen_int; 1520 memcpy(mgmt->u.reassoc_req.current_ap, 1521 assoc_data->prev_ap_addr, ETH_ALEN); 1522 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1523 } else { 1524 skb_put(skb, 4); 1525 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1526 IEEE80211_STYPE_ASSOC_REQ); 1527 capab_pos = &mgmt->u.assoc_req.capab_info; 1528 mgmt->u.assoc_req.listen_interval = listen_int; 1529 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1530 } 1531 1532 /* SSID */ 1533 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1534 ie_start = pos; 1535 *pos++ = WLAN_EID_SSID; 1536 *pos++ = assoc_data->ssid_len; 1537 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1538 1539 /* 1540 * This bit is technically reserved, so it shouldn't matter for either 1541 * the AP or us, but it also means we shouldn't set it. However, we've 1542 * always set it in the past, and apparently some EHT APs check that 1543 * we don't set it. To avoid interoperability issues with old APs that 1544 * for some reason check it and want it to be set, set the bit for all 1545 * pre-EHT connections as we used to do. 1546 */ 1547 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT) 1548 capab |= WLAN_CAPABILITY_ESS; 1549 1550 /* add the elements for the assoc (main) link */ 1551 link_capab = capab; 1552 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1553 ext_capa, 1554 assoc_data->ie, 1555 assoc_data->ie_len, 1556 assoc_data->assoc_link_id, link, 1557 present_elems); 1558 put_unaligned_le16(link_capab, capab_pos); 1559 1560 /* if present, add any custom non-vendor IEs */ 1561 if (assoc_data->ie_len) { 1562 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1563 assoc_data->ie_len, 1564 offset); 1565 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1566 offset = noffset; 1567 } 1568 1569 if (assoc_data->wmm) { 1570 if (assoc_data->uapsd) { 1571 qos_info = ifmgd->uapsd_queues; 1572 qos_info |= (ifmgd->uapsd_max_sp_len << 1573 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1574 } else { 1575 qos_info = 0; 1576 } 1577 1578 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1579 } 1580 1581 /* add any remaining custom (i.e. vendor specific here) IEs */ 1582 if (assoc_data->ie_len) { 1583 noffset = assoc_data->ie_len; 1584 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1585 } 1586 1587 if (assoc_data->fils_kek_len) { 1588 ret = fils_encrypt_assoc_req(skb, assoc_data); 1589 if (ret < 0) { 1590 dev_kfree_skb(skb); 1591 return ret; 1592 } 1593 } 1594 1595 pos = skb_tail_pointer(skb); 1596 kfree(ifmgd->assoc_req_ies); 1597 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1598 if (!ifmgd->assoc_req_ies) { 1599 dev_kfree_skb(skb); 1600 return -ENOMEM; 1601 } 1602 1603 ifmgd->assoc_req_ies_len = pos - ie_start; 1604 1605 info.link_id = assoc_data->assoc_link_id; 1606 drv_mgd_prepare_tx(local, sdata, &info); 1607 1608 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1609 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1610 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1611 IEEE80211_TX_INTFL_MLME_CONN_TX; 1612 ieee80211_tx_skb(sdata, skb); 1613 1614 return 0; 1615 } 1616 1617 void ieee80211_send_pspoll(struct ieee80211_local *local, 1618 struct ieee80211_sub_if_data *sdata) 1619 { 1620 struct ieee80211_pspoll *pspoll; 1621 struct sk_buff *skb; 1622 1623 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1624 if (!skb) 1625 return; 1626 1627 pspoll = (struct ieee80211_pspoll *) skb->data; 1628 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1629 1630 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1631 ieee80211_tx_skb(sdata, skb); 1632 } 1633 1634 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1635 struct ieee80211_sub_if_data *sdata, 1636 bool powersave) 1637 { 1638 struct sk_buff *skb; 1639 struct ieee80211_hdr_3addr *nullfunc; 1640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1641 1642 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1643 !ieee80211_hw_check(&local->hw, 1644 DOESNT_SUPPORT_QOS_NDP)); 1645 if (!skb) 1646 return; 1647 1648 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1649 if (powersave) 1650 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1651 1652 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1653 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1654 1655 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1656 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1657 1658 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1659 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1660 1661 ieee80211_tx_skb(sdata, skb); 1662 } 1663 1664 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1665 struct ieee80211_sub_if_data *sdata) 1666 { 1667 struct sk_buff *skb; 1668 struct ieee80211_hdr *nullfunc; 1669 __le16 fc; 1670 1671 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1672 return; 1673 1674 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1675 if (!skb) 1676 return; 1677 1678 skb_reserve(skb, local->hw.extra_tx_headroom); 1679 1680 nullfunc = skb_put_zero(skb, 30); 1681 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1682 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1683 nullfunc->frame_control = fc; 1684 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1685 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1686 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1687 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1688 1689 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1690 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1691 ieee80211_tx_skb(sdata, skb); 1692 } 1693 1694 /* spectrum management related things */ 1695 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1696 struct wiphy_work *work) 1697 { 1698 struct ieee80211_link_data *link = 1699 container_of(work, struct ieee80211_link_data, 1700 u.mgd.chswitch_work.work); 1701 struct ieee80211_sub_if_data *sdata = link->sdata; 1702 struct ieee80211_local *local = sdata->local; 1703 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1704 int ret; 1705 1706 if (!ieee80211_sdata_running(sdata)) 1707 return; 1708 1709 lockdep_assert_wiphy(local->hw.wiphy); 1710 1711 if (!ifmgd->associated) 1712 return; 1713 1714 if (!link->conf->csa_active) 1715 return; 1716 1717 /* 1718 * using reservation isn't immediate as it may be deferred until later 1719 * with multi-vif. once reservation is complete it will re-schedule the 1720 * work with no reserved_chanctx so verify chandef to check if it 1721 * completed successfully 1722 */ 1723 1724 if (link->reserved_chanctx) { 1725 /* 1726 * with multi-vif csa driver may call ieee80211_csa_finish() 1727 * many times while waiting for other interfaces to use their 1728 * reservations 1729 */ 1730 if (link->reserved_ready) 1731 return; 1732 1733 ret = ieee80211_link_use_reserved_context(link); 1734 if (ret) { 1735 sdata_info(sdata, 1736 "failed to use reserved channel context, disconnecting (err=%d)\n", 1737 ret); 1738 wiphy_work_queue(sdata->local->hw.wiphy, 1739 &ifmgd->csa_connection_drop_work); 1740 } 1741 return; 1742 } 1743 1744 if (!cfg80211_chandef_identical(&link->conf->chandef, 1745 &link->csa_chandef)) { 1746 sdata_info(sdata, 1747 "failed to finalize channel switch, disconnecting\n"); 1748 wiphy_work_queue(sdata->local->hw.wiphy, 1749 &ifmgd->csa_connection_drop_work); 1750 return; 1751 } 1752 1753 link->u.mgd.csa_waiting_bcn = true; 1754 1755 ieee80211_sta_reset_beacon_monitor(sdata); 1756 ieee80211_sta_reset_conn_monitor(sdata); 1757 } 1758 1759 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1760 { 1761 struct ieee80211_sub_if_data *sdata = link->sdata; 1762 struct ieee80211_local *local = sdata->local; 1763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1764 int ret; 1765 1766 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1767 1768 WARN_ON(!link->conf->csa_active); 1769 1770 if (link->csa_block_tx) { 1771 ieee80211_wake_vif_queues(local, sdata, 1772 IEEE80211_QUEUE_STOP_REASON_CSA); 1773 link->csa_block_tx = false; 1774 } 1775 1776 link->conf->csa_active = false; 1777 link->u.mgd.csa_waiting_bcn = false; 1778 /* 1779 * If the CSA IE is still present on the beacon after the switch, 1780 * we need to consider it as a new CSA (possibly to self). 1781 */ 1782 link->u.mgd.beacon_crc_valid = false; 1783 1784 ret = drv_post_channel_switch(link); 1785 if (ret) { 1786 sdata_info(sdata, 1787 "driver post channel switch failed, disconnecting\n"); 1788 wiphy_work_queue(sdata->local->hw.wiphy, 1789 &ifmgd->csa_connection_drop_work); 1790 return; 1791 } 1792 1793 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 1794 link->link_id, 0); 1795 } 1796 1797 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 1798 unsigned int link_id) 1799 { 1800 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1801 1802 trace_api_chswitch_done(sdata, success, link_id); 1803 1804 rcu_read_lock(); 1805 1806 if (!success) { 1807 sdata_info(sdata, 1808 "driver channel switch failed, disconnecting\n"); 1809 wiphy_work_queue(sdata->local->hw.wiphy, 1810 &sdata->u.mgd.csa_connection_drop_work); 1811 } else { 1812 struct ieee80211_link_data *link = 1813 rcu_dereference(sdata->link[link_id]); 1814 1815 if (WARN_ON(!link)) { 1816 rcu_read_unlock(); 1817 return; 1818 } 1819 1820 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1821 &link->u.mgd.chswitch_work, 0); 1822 } 1823 1824 rcu_read_unlock(); 1825 } 1826 EXPORT_SYMBOL(ieee80211_chswitch_done); 1827 1828 static void 1829 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1830 { 1831 struct ieee80211_sub_if_data *sdata = link->sdata; 1832 struct ieee80211_local *local = sdata->local; 1833 1834 lockdep_assert_wiphy(local->hw.wiphy); 1835 1836 if (!local->ops->abort_channel_switch) 1837 return; 1838 1839 ieee80211_link_unreserve_chanctx(link); 1840 1841 if (link->csa_block_tx) 1842 ieee80211_wake_vif_queues(local, sdata, 1843 IEEE80211_QUEUE_STOP_REASON_CSA); 1844 1845 link->csa_block_tx = false; 1846 link->conf->csa_active = false; 1847 1848 drv_abort_channel_switch(sdata); 1849 } 1850 1851 static void 1852 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1853 u64 timestamp, u32 device_timestamp, 1854 struct ieee802_11_elems *elems, 1855 bool beacon) 1856 { 1857 struct ieee80211_sub_if_data *sdata = link->sdata; 1858 struct ieee80211_local *local = sdata->local; 1859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1860 struct cfg80211_bss *cbss = link->u.mgd.bss; 1861 struct ieee80211_chanctx_conf *conf; 1862 struct ieee80211_chanctx *chanctx; 1863 enum nl80211_band current_band; 1864 struct ieee80211_csa_ie csa_ie; 1865 struct ieee80211_channel_switch ch_switch; 1866 struct ieee80211_bss *bss; 1867 unsigned long timeout; 1868 int res; 1869 1870 lockdep_assert_wiphy(local->hw.wiphy); 1871 1872 if (!cbss) 1873 return; 1874 1875 current_band = cbss->channel->band; 1876 bss = (void *)cbss->priv; 1877 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1878 bss->vht_cap_info, 1879 link->u.mgd.conn_flags, 1880 link->u.mgd.bssid, &csa_ie); 1881 1882 if (!res) { 1883 ch_switch.timestamp = timestamp; 1884 ch_switch.device_timestamp = device_timestamp; 1885 ch_switch.block_tx = csa_ie.mode; 1886 ch_switch.chandef = csa_ie.chandef; 1887 ch_switch.count = csa_ie.count; 1888 ch_switch.delay = csa_ie.max_switch_time; 1889 } 1890 1891 if (res < 0) 1892 goto drop_connection; 1893 1894 if (beacon && link->conf->csa_active && 1895 !link->u.mgd.csa_waiting_bcn) { 1896 if (res) 1897 ieee80211_sta_abort_chanswitch(link); 1898 else 1899 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1900 return; 1901 } else if (link->conf->csa_active || res) { 1902 /* disregard subsequent announcements if already processing */ 1903 return; 1904 } 1905 1906 if (link->conf->chandef.chan->band != 1907 csa_ie.chandef.chan->band) { 1908 sdata_info(sdata, 1909 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1910 link->u.mgd.bssid, 1911 csa_ie.chandef.chan->center_freq, 1912 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1913 csa_ie.chandef.center_freq2); 1914 goto drop_connection; 1915 } 1916 1917 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1918 IEEE80211_CHAN_DISABLED)) { 1919 sdata_info(sdata, 1920 "AP %pM switches to unsupported channel " 1921 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1922 "disconnecting\n", 1923 link->u.mgd.bssid, 1924 csa_ie.chandef.chan->center_freq, 1925 csa_ie.chandef.chan->freq_offset, 1926 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1927 csa_ie.chandef.freq1_offset, 1928 csa_ie.chandef.center_freq2); 1929 goto drop_connection; 1930 } 1931 1932 if (cfg80211_chandef_identical(&csa_ie.chandef, 1933 &link->conf->chandef) && 1934 (!csa_ie.mode || !beacon)) { 1935 if (link->u.mgd.csa_ignored_same_chan) 1936 return; 1937 sdata_info(sdata, 1938 "AP %pM tries to chanswitch to same channel, ignore\n", 1939 link->u.mgd.bssid); 1940 link->u.mgd.csa_ignored_same_chan = true; 1941 return; 1942 } 1943 1944 /* 1945 * Drop all TDLS peers - either we disconnect or move to a different 1946 * channel from this point on. There's no telling what our peer will do. 1947 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1948 * have an incompatible wider chandef. 1949 */ 1950 ieee80211_teardown_tdls_peers(sdata); 1951 1952 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1953 lockdep_is_held(&local->hw.wiphy->mtx)); 1954 if (!conf) { 1955 sdata_info(sdata, 1956 "no channel context assigned to vif?, disconnecting\n"); 1957 goto drop_connection; 1958 } 1959 1960 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1961 1962 if (local->use_chanctx && 1963 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1964 sdata_info(sdata, 1965 "driver doesn't support chan-switch with channel contexts\n"); 1966 goto drop_connection; 1967 } 1968 1969 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1970 sdata_info(sdata, 1971 "preparing for channel switch failed, disconnecting\n"); 1972 goto drop_connection; 1973 } 1974 1975 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1976 chanctx->mode, false); 1977 if (res) { 1978 sdata_info(sdata, 1979 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1980 res); 1981 goto drop_connection; 1982 } 1983 1984 link->conf->csa_active = true; 1985 link->csa_chandef = csa_ie.chandef; 1986 link->csa_block_tx = csa_ie.mode; 1987 link->u.mgd.csa_ignored_same_chan = false; 1988 link->u.mgd.beacon_crc_valid = false; 1989 1990 if (link->csa_block_tx) 1991 ieee80211_stop_vif_queues(local, sdata, 1992 IEEE80211_QUEUE_STOP_REASON_CSA); 1993 1994 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1995 link->link_id, csa_ie.count, 1996 csa_ie.mode, 0); 1997 1998 if (local->ops->channel_switch) { 1999 /* use driver's channel switch callback */ 2000 drv_channel_switch(local, sdata, &ch_switch); 2001 return; 2002 } 2003 2004 /* channel switch handled in software */ 2005 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2006 cbss->beacon_interval); 2007 wiphy_delayed_work_queue(local->hw.wiphy, 2008 &link->u.mgd.chswitch_work, 2009 timeout); 2010 return; 2011 drop_connection: 2012 /* 2013 * This is just so that the disconnect flow will know that 2014 * we were trying to switch channel and failed. In case the 2015 * mode is 1 (we are not allowed to Tx), we will know not to 2016 * send a deauthentication frame. Those two fields will be 2017 * reset when the disconnection worker runs. 2018 */ 2019 link->conf->csa_active = true; 2020 link->csa_block_tx = csa_ie.mode; 2021 2022 wiphy_work_queue(sdata->local->hw.wiphy, 2023 &ifmgd->csa_connection_drop_work); 2024 } 2025 2026 static bool 2027 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2028 struct ieee80211_channel *channel, 2029 const u8 *country_ie, u8 country_ie_len, 2030 const u8 *pwr_constr_elem, 2031 int *chan_pwr, int *pwr_reduction) 2032 { 2033 struct ieee80211_country_ie_triplet *triplet; 2034 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2035 int i, chan_increment; 2036 bool have_chan_pwr = false; 2037 2038 /* Invalid IE */ 2039 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2040 return false; 2041 2042 triplet = (void *)(country_ie + 3); 2043 country_ie_len -= 3; 2044 2045 switch (channel->band) { 2046 default: 2047 WARN_ON_ONCE(1); 2048 fallthrough; 2049 case NL80211_BAND_2GHZ: 2050 case NL80211_BAND_60GHZ: 2051 case NL80211_BAND_LC: 2052 chan_increment = 1; 2053 break; 2054 case NL80211_BAND_5GHZ: 2055 chan_increment = 4; 2056 break; 2057 case NL80211_BAND_6GHZ: 2058 /* 2059 * In the 6 GHz band, the "maximum transmit power level" 2060 * field in the triplets is reserved, and thus will be 2061 * zero and we shouldn't use it to control TX power. 2062 * The actual TX power will be given in the transmit 2063 * power envelope element instead. 2064 */ 2065 return false; 2066 } 2067 2068 /* find channel */ 2069 while (country_ie_len >= 3) { 2070 u8 first_channel = triplet->chans.first_channel; 2071 2072 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2073 goto next; 2074 2075 for (i = 0; i < triplet->chans.num_channels; i++) { 2076 if (first_channel + i * chan_increment == chan) { 2077 have_chan_pwr = true; 2078 *chan_pwr = triplet->chans.max_power; 2079 break; 2080 } 2081 } 2082 if (have_chan_pwr) 2083 break; 2084 2085 next: 2086 triplet++; 2087 country_ie_len -= 3; 2088 } 2089 2090 if (have_chan_pwr && pwr_constr_elem) 2091 *pwr_reduction = *pwr_constr_elem; 2092 else 2093 *pwr_reduction = 0; 2094 2095 return have_chan_pwr; 2096 } 2097 2098 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2099 struct ieee80211_channel *channel, 2100 const u8 *cisco_dtpc_ie, 2101 int *pwr_level) 2102 { 2103 /* From practical testing, the first data byte of the DTPC element 2104 * seems to contain the requested dBm level, and the CLI on Cisco 2105 * APs clearly state the range is -127 to 127 dBm, which indicates 2106 * a signed byte, although it seemingly never actually goes negative. 2107 * The other byte seems to always be zero. 2108 */ 2109 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2110 } 2111 2112 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2113 struct ieee80211_channel *channel, 2114 struct ieee80211_mgmt *mgmt, 2115 const u8 *country_ie, u8 country_ie_len, 2116 const u8 *pwr_constr_ie, 2117 const u8 *cisco_dtpc_ie) 2118 { 2119 struct ieee80211_sub_if_data *sdata = link->sdata; 2120 bool has_80211h_pwr = false, has_cisco_pwr = false; 2121 int chan_pwr = 0, pwr_reduction_80211h = 0; 2122 int pwr_level_cisco, pwr_level_80211h; 2123 int new_ap_level; 2124 __le16 capab = mgmt->u.probe_resp.capab_info; 2125 2126 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2127 return 0; /* TODO */ 2128 2129 if (country_ie && 2130 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2131 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2132 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2133 sdata, channel, country_ie, country_ie_len, 2134 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2135 pwr_level_80211h = 2136 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2137 } 2138 2139 if (cisco_dtpc_ie) { 2140 ieee80211_find_cisco_dtpc( 2141 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2142 has_cisco_pwr = true; 2143 } 2144 2145 if (!has_80211h_pwr && !has_cisco_pwr) 2146 return 0; 2147 2148 /* If we have both 802.11h and Cisco DTPC, apply both limits 2149 * by picking the smallest of the two power levels advertised. 2150 */ 2151 if (has_80211h_pwr && 2152 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2153 new_ap_level = pwr_level_80211h; 2154 2155 if (link->ap_power_level == new_ap_level) 2156 return 0; 2157 2158 sdata_dbg(sdata, 2159 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2160 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2161 link->u.mgd.bssid); 2162 } else { /* has_cisco_pwr is always true here. */ 2163 new_ap_level = pwr_level_cisco; 2164 2165 if (link->ap_power_level == new_ap_level) 2166 return 0; 2167 2168 sdata_dbg(sdata, 2169 "Limiting TX power to %d dBm as advertised by %pM\n", 2170 pwr_level_cisco, link->u.mgd.bssid); 2171 } 2172 2173 link->ap_power_level = new_ap_level; 2174 if (__ieee80211_recalc_txpower(sdata)) 2175 return BSS_CHANGED_TXPOWER; 2176 return 0; 2177 } 2178 2179 /* powersave */ 2180 static void ieee80211_enable_ps(struct ieee80211_local *local, 2181 struct ieee80211_sub_if_data *sdata) 2182 { 2183 struct ieee80211_conf *conf = &local->hw.conf; 2184 2185 /* 2186 * If we are scanning right now then the parameters will 2187 * take effect when scan finishes. 2188 */ 2189 if (local->scanning) 2190 return; 2191 2192 if (conf->dynamic_ps_timeout > 0 && 2193 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2194 mod_timer(&local->dynamic_ps_timer, jiffies + 2195 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2196 } else { 2197 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2198 ieee80211_send_nullfunc(local, sdata, true); 2199 2200 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2201 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2202 return; 2203 2204 conf->flags |= IEEE80211_CONF_PS; 2205 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2206 } 2207 } 2208 2209 static void ieee80211_change_ps(struct ieee80211_local *local) 2210 { 2211 struct ieee80211_conf *conf = &local->hw.conf; 2212 2213 if (local->ps_sdata) { 2214 ieee80211_enable_ps(local, local->ps_sdata); 2215 } else if (conf->flags & IEEE80211_CONF_PS) { 2216 conf->flags &= ~IEEE80211_CONF_PS; 2217 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2218 del_timer_sync(&local->dynamic_ps_timer); 2219 wiphy_work_cancel(local->hw.wiphy, 2220 &local->dynamic_ps_enable_work); 2221 } 2222 } 2223 2224 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2225 { 2226 struct ieee80211_local *local = sdata->local; 2227 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2228 struct sta_info *sta = NULL; 2229 bool authorized = false; 2230 2231 if (!mgd->powersave) 2232 return false; 2233 2234 if (mgd->broken_ap) 2235 return false; 2236 2237 if (!mgd->associated) 2238 return false; 2239 2240 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2241 return false; 2242 2243 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2244 !sdata->deflink.u.mgd.have_beacon) 2245 return false; 2246 2247 rcu_read_lock(); 2248 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2249 if (sta) 2250 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2251 rcu_read_unlock(); 2252 2253 return authorized; 2254 } 2255 2256 /* need to hold RTNL or interface lock */ 2257 void ieee80211_recalc_ps(struct ieee80211_local *local) 2258 { 2259 struct ieee80211_sub_if_data *sdata, *found = NULL; 2260 int count = 0; 2261 int timeout; 2262 2263 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2264 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2265 local->ps_sdata = NULL; 2266 return; 2267 } 2268 2269 list_for_each_entry(sdata, &local->interfaces, list) { 2270 if (!ieee80211_sdata_running(sdata)) 2271 continue; 2272 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2273 /* If an AP vif is found, then disable PS 2274 * by setting the count to zero thereby setting 2275 * ps_sdata to NULL. 2276 */ 2277 count = 0; 2278 break; 2279 } 2280 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2281 continue; 2282 found = sdata; 2283 count++; 2284 } 2285 2286 if (count == 1 && ieee80211_powersave_allowed(found)) { 2287 u8 dtimper = found->deflink.u.mgd.dtim_period; 2288 2289 timeout = local->dynamic_ps_forced_timeout; 2290 if (timeout < 0) 2291 timeout = 100; 2292 local->hw.conf.dynamic_ps_timeout = timeout; 2293 2294 /* If the TIM IE is invalid, pretend the value is 1 */ 2295 if (!dtimper) 2296 dtimper = 1; 2297 2298 local->hw.conf.ps_dtim_period = dtimper; 2299 local->ps_sdata = found; 2300 } else { 2301 local->ps_sdata = NULL; 2302 } 2303 2304 ieee80211_change_ps(local); 2305 } 2306 2307 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2308 { 2309 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2310 2311 if (sdata->vif.cfg.ps != ps_allowed) { 2312 sdata->vif.cfg.ps = ps_allowed; 2313 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2314 } 2315 } 2316 2317 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2318 struct wiphy_work *work) 2319 { 2320 struct ieee80211_local *local = 2321 container_of(work, struct ieee80211_local, 2322 dynamic_ps_disable_work); 2323 2324 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2325 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2326 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2327 } 2328 2329 ieee80211_wake_queues_by_reason(&local->hw, 2330 IEEE80211_MAX_QUEUE_MAP, 2331 IEEE80211_QUEUE_STOP_REASON_PS, 2332 false); 2333 } 2334 2335 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2336 struct wiphy_work *work) 2337 { 2338 struct ieee80211_local *local = 2339 container_of(work, struct ieee80211_local, 2340 dynamic_ps_enable_work); 2341 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2342 struct ieee80211_if_managed *ifmgd; 2343 unsigned long flags; 2344 int q; 2345 2346 /* can only happen when PS was just disabled anyway */ 2347 if (!sdata) 2348 return; 2349 2350 ifmgd = &sdata->u.mgd; 2351 2352 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2353 return; 2354 2355 if (local->hw.conf.dynamic_ps_timeout > 0) { 2356 /* don't enter PS if TX frames are pending */ 2357 if (drv_tx_frames_pending(local)) { 2358 mod_timer(&local->dynamic_ps_timer, jiffies + 2359 msecs_to_jiffies( 2360 local->hw.conf.dynamic_ps_timeout)); 2361 return; 2362 } 2363 2364 /* 2365 * transmission can be stopped by others which leads to 2366 * dynamic_ps_timer expiry. Postpone the ps timer if it 2367 * is not the actual idle state. 2368 */ 2369 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2370 for (q = 0; q < local->hw.queues; q++) { 2371 if (local->queue_stop_reasons[q]) { 2372 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2373 flags); 2374 mod_timer(&local->dynamic_ps_timer, jiffies + 2375 msecs_to_jiffies( 2376 local->hw.conf.dynamic_ps_timeout)); 2377 return; 2378 } 2379 } 2380 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2381 } 2382 2383 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2384 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2385 if (drv_tx_frames_pending(local)) { 2386 mod_timer(&local->dynamic_ps_timer, jiffies + 2387 msecs_to_jiffies( 2388 local->hw.conf.dynamic_ps_timeout)); 2389 } else { 2390 ieee80211_send_nullfunc(local, sdata, true); 2391 /* Flush to get the tx status of nullfunc frame */ 2392 ieee80211_flush_queues(local, sdata, false); 2393 } 2394 } 2395 2396 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2397 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2398 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2399 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2400 local->hw.conf.flags |= IEEE80211_CONF_PS; 2401 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2402 } 2403 } 2404 2405 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2406 { 2407 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2408 2409 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 2410 } 2411 2412 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 2413 { 2414 struct ieee80211_link_data *link = 2415 container_of(work, struct ieee80211_link_data, 2416 dfs_cac_timer_work.work); 2417 struct cfg80211_chan_def chandef = link->conf->chandef; 2418 struct ieee80211_sub_if_data *sdata = link->sdata; 2419 2420 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2421 2422 if (sdata->wdev.cac_started) { 2423 ieee80211_link_release_channel(link); 2424 cfg80211_cac_event(sdata->dev, &chandef, 2425 NL80211_RADAR_CAC_FINISHED, 2426 GFP_KERNEL); 2427 } 2428 } 2429 2430 static bool 2431 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2432 { 2433 struct ieee80211_local *local = sdata->local; 2434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2435 bool ret = false; 2436 int ac; 2437 2438 if (local->hw.queues < IEEE80211_NUM_ACS) 2439 return false; 2440 2441 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2442 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2443 int non_acm_ac; 2444 unsigned long now = jiffies; 2445 2446 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2447 tx_tspec->admitted_time && 2448 time_after(now, tx_tspec->time_slice_start + HZ)) { 2449 tx_tspec->consumed_tx_time = 0; 2450 tx_tspec->time_slice_start = now; 2451 2452 if (tx_tspec->downgraded) 2453 tx_tspec->action = 2454 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2455 } 2456 2457 switch (tx_tspec->action) { 2458 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2459 /* take the original parameters */ 2460 if (drv_conf_tx(local, &sdata->deflink, ac, 2461 &sdata->deflink.tx_conf[ac])) 2462 link_err(&sdata->deflink, 2463 "failed to set TX queue parameters for queue %d\n", 2464 ac); 2465 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2466 tx_tspec->downgraded = false; 2467 ret = true; 2468 break; 2469 case TX_TSPEC_ACTION_DOWNGRADE: 2470 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2471 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2472 ret = true; 2473 break; 2474 } 2475 /* downgrade next lower non-ACM AC */ 2476 for (non_acm_ac = ac + 1; 2477 non_acm_ac < IEEE80211_NUM_ACS; 2478 non_acm_ac++) 2479 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2480 break; 2481 /* Usually the loop will result in using BK even if it 2482 * requires admission control, but such a configuration 2483 * makes no sense and we have to transmit somehow - the 2484 * AC selection does the same thing. 2485 * If we started out trying to downgrade from BK, then 2486 * the extra condition here might be needed. 2487 */ 2488 if (non_acm_ac >= IEEE80211_NUM_ACS) 2489 non_acm_ac = IEEE80211_AC_BK; 2490 if (drv_conf_tx(local, &sdata->deflink, ac, 2491 &sdata->deflink.tx_conf[non_acm_ac])) 2492 link_err(&sdata->deflink, 2493 "failed to set TX queue parameters for queue %d\n", 2494 ac); 2495 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2496 ret = true; 2497 wiphy_delayed_work_queue(local->hw.wiphy, 2498 &ifmgd->tx_tspec_wk, 2499 tx_tspec->time_slice_start + 2500 HZ - now + 1); 2501 break; 2502 case TX_TSPEC_ACTION_NONE: 2503 /* nothing now */ 2504 break; 2505 } 2506 } 2507 2508 return ret; 2509 } 2510 2511 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2512 { 2513 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2514 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2515 BSS_CHANGED_QOS); 2516 } 2517 2518 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 2519 struct wiphy_work *work) 2520 { 2521 struct ieee80211_sub_if_data *sdata; 2522 2523 sdata = container_of(work, struct ieee80211_sub_if_data, 2524 u.mgd.tx_tspec_wk.work); 2525 ieee80211_sta_handle_tspec_ac_params(sdata); 2526 } 2527 2528 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2529 { 2530 struct ieee80211_sub_if_data *sdata = link->sdata; 2531 struct ieee80211_local *local = sdata->local; 2532 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2533 struct ieee80211_tx_queue_params *params = link->tx_conf; 2534 u8 ac; 2535 2536 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2537 mlme_dbg(sdata, 2538 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2539 ac, params[ac].acm, 2540 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2541 params[ac].txop, params[ac].uapsd, 2542 ifmgd->tx_tspec[ac].downgraded); 2543 if (!ifmgd->tx_tspec[ac].downgraded && 2544 drv_conf_tx(local, link, ac, ¶ms[ac])) 2545 link_err(link, 2546 "failed to set TX queue parameters for AC %d\n", 2547 ac); 2548 } 2549 } 2550 2551 /* MLME */ 2552 static bool 2553 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2554 struct ieee80211_link_data *link, 2555 const u8 *wmm_param, size_t wmm_param_len, 2556 const struct ieee80211_mu_edca_param_set *mu_edca) 2557 { 2558 struct ieee80211_sub_if_data *sdata = link->sdata; 2559 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2561 size_t left; 2562 int count, mu_edca_count, ac; 2563 const u8 *pos; 2564 u8 uapsd_queues = 0; 2565 2566 if (!local->ops->conf_tx) 2567 return false; 2568 2569 if (local->hw.queues < IEEE80211_NUM_ACS) 2570 return false; 2571 2572 if (!wmm_param) 2573 return false; 2574 2575 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2576 return false; 2577 2578 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2579 uapsd_queues = ifmgd->uapsd_queues; 2580 2581 count = wmm_param[6] & 0x0f; 2582 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2583 * if mu_edca was preset before and now it disappeared tell 2584 * the driver about it. 2585 */ 2586 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2587 if (count == link->u.mgd.wmm_last_param_set && 2588 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2589 return false; 2590 link->u.mgd.wmm_last_param_set = count; 2591 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2592 2593 pos = wmm_param + 8; 2594 left = wmm_param_len - 8; 2595 2596 memset(¶ms, 0, sizeof(params)); 2597 2598 sdata->wmm_acm = 0; 2599 for (; left >= 4; left -= 4, pos += 4) { 2600 int aci = (pos[0] >> 5) & 0x03; 2601 int acm = (pos[0] >> 4) & 0x01; 2602 bool uapsd = false; 2603 2604 switch (aci) { 2605 case 1: /* AC_BK */ 2606 ac = IEEE80211_AC_BK; 2607 if (acm) 2608 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2609 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2610 uapsd = true; 2611 params[ac].mu_edca = !!mu_edca; 2612 if (mu_edca) 2613 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2614 break; 2615 case 2: /* AC_VI */ 2616 ac = IEEE80211_AC_VI; 2617 if (acm) 2618 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2619 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2620 uapsd = true; 2621 params[ac].mu_edca = !!mu_edca; 2622 if (mu_edca) 2623 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2624 break; 2625 case 3: /* AC_VO */ 2626 ac = IEEE80211_AC_VO; 2627 if (acm) 2628 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2629 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2630 uapsd = true; 2631 params[ac].mu_edca = !!mu_edca; 2632 if (mu_edca) 2633 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2634 break; 2635 case 0: /* AC_BE */ 2636 default: 2637 ac = IEEE80211_AC_BE; 2638 if (acm) 2639 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2640 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2641 uapsd = true; 2642 params[ac].mu_edca = !!mu_edca; 2643 if (mu_edca) 2644 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2645 break; 2646 } 2647 2648 params[ac].aifs = pos[0] & 0x0f; 2649 2650 if (params[ac].aifs < 2) { 2651 link_info(link, 2652 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2653 params[ac].aifs, aci); 2654 params[ac].aifs = 2; 2655 } 2656 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2657 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2658 params[ac].txop = get_unaligned_le16(pos + 2); 2659 params[ac].acm = acm; 2660 params[ac].uapsd = uapsd; 2661 2662 if (params[ac].cw_min == 0 || 2663 params[ac].cw_min > params[ac].cw_max) { 2664 link_info(link, 2665 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2666 params[ac].cw_min, params[ac].cw_max, aci); 2667 return false; 2668 } 2669 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2670 } 2671 2672 /* WMM specification requires all 4 ACIs. */ 2673 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2674 if (params[ac].cw_min == 0) { 2675 link_info(link, 2676 "AP has invalid WMM params (missing AC %d), using defaults\n", 2677 ac); 2678 return false; 2679 } 2680 } 2681 2682 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2683 link->tx_conf[ac] = params[ac]; 2684 2685 ieee80211_mgd_set_link_qos_params(link); 2686 2687 /* enable WMM or activate new settings */ 2688 link->conf->qos = true; 2689 return true; 2690 } 2691 2692 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2693 { 2694 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2695 2696 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2697 ieee80211_run_deferred_scan(sdata->local); 2698 } 2699 2700 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2701 { 2702 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2703 2704 __ieee80211_stop_poll(sdata); 2705 } 2706 2707 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2708 u16 capab, bool erp_valid, u8 erp) 2709 { 2710 struct ieee80211_bss_conf *bss_conf = link->conf; 2711 struct ieee80211_supported_band *sband; 2712 u64 changed = 0; 2713 bool use_protection; 2714 bool use_short_preamble; 2715 bool use_short_slot; 2716 2717 sband = ieee80211_get_link_sband(link); 2718 if (!sband) 2719 return changed; 2720 2721 if (erp_valid) { 2722 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2723 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2724 } else { 2725 use_protection = false; 2726 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2727 } 2728 2729 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2730 if (sband->band == NL80211_BAND_5GHZ || 2731 sband->band == NL80211_BAND_6GHZ) 2732 use_short_slot = true; 2733 2734 if (use_protection != bss_conf->use_cts_prot) { 2735 bss_conf->use_cts_prot = use_protection; 2736 changed |= BSS_CHANGED_ERP_CTS_PROT; 2737 } 2738 2739 if (use_short_preamble != bss_conf->use_short_preamble) { 2740 bss_conf->use_short_preamble = use_short_preamble; 2741 changed |= BSS_CHANGED_ERP_PREAMBLE; 2742 } 2743 2744 if (use_short_slot != bss_conf->use_short_slot) { 2745 bss_conf->use_short_slot = use_short_slot; 2746 changed |= BSS_CHANGED_ERP_SLOT; 2747 } 2748 2749 return changed; 2750 } 2751 2752 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2753 struct cfg80211_bss *cbss) 2754 { 2755 struct ieee80211_sub_if_data *sdata = link->sdata; 2756 struct ieee80211_bss_conf *bss_conf = link->conf; 2757 struct ieee80211_bss *bss = (void *)cbss->priv; 2758 u64 changed = BSS_CHANGED_QOS; 2759 2760 /* not really used in MLO */ 2761 sdata->u.mgd.beacon_timeout = 2762 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2763 bss_conf->beacon_int)); 2764 2765 changed |= ieee80211_handle_bss_capability(link, 2766 bss_conf->assoc_capability, 2767 bss->has_erp_value, 2768 bss->erp_value); 2769 2770 ieee80211_check_rate_mask(link); 2771 2772 link->u.mgd.bss = cbss; 2773 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2774 2775 if (sdata->vif.p2p || 2776 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2777 const struct cfg80211_bss_ies *ies; 2778 2779 rcu_read_lock(); 2780 ies = rcu_dereference(cbss->ies); 2781 if (ies) { 2782 int ret; 2783 2784 ret = cfg80211_get_p2p_attr( 2785 ies->data, ies->len, 2786 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2787 (u8 *) &bss_conf->p2p_noa_attr, 2788 sizeof(bss_conf->p2p_noa_attr)); 2789 if (ret >= 2) { 2790 link->u.mgd.p2p_noa_index = 2791 bss_conf->p2p_noa_attr.index; 2792 changed |= BSS_CHANGED_P2P_PS; 2793 } 2794 } 2795 rcu_read_unlock(); 2796 } 2797 2798 if (link->u.mgd.have_beacon) { 2799 bss_conf->beacon_rate = bss->beacon_rate; 2800 changed |= BSS_CHANGED_BEACON_INFO; 2801 } else { 2802 bss_conf->beacon_rate = NULL; 2803 } 2804 2805 /* Tell the driver to monitor connection quality (if supported) */ 2806 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2807 bss_conf->cqm_rssi_thold) 2808 changed |= BSS_CHANGED_CQM; 2809 2810 return changed; 2811 } 2812 2813 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2814 struct ieee80211_mgd_assoc_data *assoc_data, 2815 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2816 { 2817 struct ieee80211_local *local = sdata->local; 2818 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2819 u64 vif_changed = BSS_CHANGED_ASSOC; 2820 unsigned int link_id; 2821 2822 lockdep_assert_wiphy(local->hw.wiphy); 2823 2824 sdata->u.mgd.associated = true; 2825 2826 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2827 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2828 struct ieee80211_link_data *link; 2829 2830 if (!cbss || 2831 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2832 continue; 2833 2834 if (ieee80211_vif_is_mld(&sdata->vif) && 2835 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 2836 continue; 2837 2838 link = sdata_dereference(sdata->link[link_id], sdata); 2839 if (WARN_ON(!link)) 2840 return; 2841 2842 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2843 } 2844 2845 /* just to be sure */ 2846 ieee80211_stop_poll(sdata); 2847 2848 ieee80211_led_assoc(local, 1); 2849 2850 vif_cfg->assoc = 1; 2851 2852 /* Enable ARP filtering */ 2853 if (vif_cfg->arp_addr_cnt) 2854 vif_changed |= BSS_CHANGED_ARP_FILTER; 2855 2856 if (ieee80211_vif_is_mld(&sdata->vif)) { 2857 for (link_id = 0; 2858 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2859 link_id++) { 2860 struct ieee80211_link_data *link; 2861 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2862 2863 if (!cbss || 2864 !(BIT(link_id) & 2865 ieee80211_vif_usable_links(&sdata->vif)) || 2866 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2867 continue; 2868 2869 link = sdata_dereference(sdata->link[link_id], sdata); 2870 if (WARN_ON(!link)) 2871 return; 2872 2873 ieee80211_link_info_change_notify(sdata, link, 2874 changed[link_id]); 2875 2876 ieee80211_recalc_smps(sdata, link); 2877 } 2878 2879 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2880 } else { 2881 ieee80211_bss_info_change_notify(sdata, 2882 vif_changed | changed[0]); 2883 } 2884 2885 ieee80211_recalc_ps(local); 2886 2887 /* leave this here to not change ordering in non-MLO cases */ 2888 if (!ieee80211_vif_is_mld(&sdata->vif)) 2889 ieee80211_recalc_smps(sdata, &sdata->deflink); 2890 ieee80211_recalc_ps_vif(sdata); 2891 2892 netif_carrier_on(sdata->dev); 2893 } 2894 2895 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2896 u16 stype, u16 reason, bool tx, 2897 u8 *frame_buf) 2898 { 2899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2900 struct ieee80211_local *local = sdata->local; 2901 unsigned int link_id; 2902 u64 changed = 0; 2903 struct ieee80211_prep_tx_info info = { 2904 .subtype = stype, 2905 }; 2906 2907 lockdep_assert_wiphy(local->hw.wiphy); 2908 2909 if (WARN_ON_ONCE(tx && !frame_buf)) 2910 return; 2911 2912 if (WARN_ON(!ifmgd->associated)) 2913 return; 2914 2915 ieee80211_stop_poll(sdata); 2916 2917 ifmgd->associated = false; 2918 2919 /* other links will be destroyed */ 2920 sdata->deflink.u.mgd.bss = NULL; 2921 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 2922 2923 netif_carrier_off(sdata->dev); 2924 2925 /* 2926 * if we want to get out of ps before disassoc (why?) we have 2927 * to do it before sending disassoc, as otherwise the null-packet 2928 * won't be valid. 2929 */ 2930 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2931 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2932 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2933 } 2934 local->ps_sdata = NULL; 2935 2936 /* disable per-vif ps */ 2937 ieee80211_recalc_ps_vif(sdata); 2938 2939 /* make sure ongoing transmission finishes */ 2940 synchronize_net(); 2941 2942 /* 2943 * drop any frame before deauth/disassoc, this can be data or 2944 * management frame. Since we are disconnecting, we should not 2945 * insist sending these frames which can take time and delay 2946 * the disconnection and possible the roaming. 2947 */ 2948 if (tx) 2949 ieee80211_flush_queues(local, sdata, true); 2950 2951 /* deauthenticate/disassociate now */ 2952 if (tx || frame_buf) { 2953 /* 2954 * In multi channel scenarios guarantee that the virtual 2955 * interface is granted immediate airtime to transmit the 2956 * deauthentication frame by calling mgd_prepare_tx, if the 2957 * driver requested so. 2958 */ 2959 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 2960 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 2961 link_id++) { 2962 struct ieee80211_link_data *link; 2963 2964 link = sdata_dereference(sdata->link[link_id], 2965 sdata); 2966 if (!link) 2967 continue; 2968 if (link->u.mgd.have_beacon) 2969 break; 2970 } 2971 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 2972 info.link_id = ffs(sdata->vif.active_links) - 1; 2973 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2974 } 2975 } 2976 2977 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2978 sdata->vif.cfg.ap_addr, stype, 2979 reason, tx, frame_buf); 2980 } 2981 2982 /* flush out frame - make sure the deauth was actually sent */ 2983 if (tx) 2984 ieee80211_flush_queues(local, sdata, false); 2985 2986 drv_mgd_complete_tx(sdata->local, sdata, &info); 2987 2988 /* clear AP addr only after building the needed mgmt frames */ 2989 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2990 eth_zero_addr(sdata->vif.cfg.ap_addr); 2991 2992 sdata->vif.cfg.ssid_len = 0; 2993 2994 /* remove AP and TDLS peers */ 2995 sta_info_flush(sdata); 2996 2997 /* finally reset all BSS / config parameters */ 2998 if (!ieee80211_vif_is_mld(&sdata->vif)) 2999 changed |= ieee80211_reset_erp_info(sdata); 3000 3001 ieee80211_led_assoc(local, 0); 3002 changed |= BSS_CHANGED_ASSOC; 3003 sdata->vif.cfg.assoc = false; 3004 3005 sdata->deflink.u.mgd.p2p_noa_index = -1; 3006 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3007 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3008 3009 /* on the next assoc, re-program HT/VHT parameters */ 3010 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3011 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3012 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3013 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3014 3015 /* 3016 * reset MU-MIMO ownership and group data in default link, 3017 * if used, other links are destroyed 3018 */ 3019 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3020 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3021 memset(sdata->vif.bss_conf.mu_group.position, 0, 3022 sizeof(sdata->vif.bss_conf.mu_group.position)); 3023 if (!ieee80211_vif_is_mld(&sdata->vif)) 3024 changed |= BSS_CHANGED_MU_GROUPS; 3025 sdata->vif.bss_conf.mu_mimo_owner = false; 3026 3027 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3028 3029 del_timer_sync(&local->dynamic_ps_timer); 3030 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3031 3032 /* Disable ARP filtering */ 3033 if (sdata->vif.cfg.arp_addr_cnt) 3034 changed |= BSS_CHANGED_ARP_FILTER; 3035 3036 sdata->vif.bss_conf.qos = false; 3037 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3038 changed |= BSS_CHANGED_QOS; 3039 /* The BSSID (not really interesting) and HT changed */ 3040 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3041 ieee80211_bss_info_change_notify(sdata, changed); 3042 } else { 3043 ieee80211_vif_cfg_change_notify(sdata, changed); 3044 } 3045 3046 /* disassociated - set to defaults now */ 3047 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3048 3049 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3050 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3051 del_timer_sync(&sdata->u.mgd.timer); 3052 3053 sdata->vif.bss_conf.dtim_period = 0; 3054 sdata->vif.bss_conf.beacon_rate = NULL; 3055 3056 sdata->deflink.u.mgd.have_beacon = false; 3057 sdata->deflink.u.mgd.tracking_signal_avg = false; 3058 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3059 3060 ifmgd->flags = 0; 3061 sdata->deflink.u.mgd.conn_flags = 0; 3062 3063 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3064 struct ieee80211_link_data *link; 3065 3066 link = sdata_dereference(sdata->link[link_id], sdata); 3067 if (!link) 3068 continue; 3069 ieee80211_link_release_channel(link); 3070 } 3071 3072 sdata->vif.bss_conf.csa_active = false; 3073 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3074 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3075 if (sdata->deflink.csa_block_tx) { 3076 ieee80211_wake_vif_queues(local, sdata, 3077 IEEE80211_QUEUE_STOP_REASON_CSA); 3078 sdata->deflink.csa_block_tx = false; 3079 } 3080 3081 /* existing TX TSPEC sessions no longer exist */ 3082 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3083 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3084 3085 sdata->vif.bss_conf.pwr_reduction = 0; 3086 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3087 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3088 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3089 3090 memset(&sdata->u.mgd.ttlm_info, 0, 3091 sizeof(sdata->u.mgd.ttlm_info)); 3092 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3093 ieee80211_vif_set_links(sdata, 0, 0); 3094 } 3095 3096 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3097 { 3098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3099 struct ieee80211_local *local = sdata->local; 3100 3101 lockdep_assert_wiphy(local->hw.wiphy); 3102 3103 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3104 return; 3105 3106 __ieee80211_stop_poll(sdata); 3107 3108 ieee80211_recalc_ps(local); 3109 3110 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3111 return; 3112 3113 /* 3114 * We've received a probe response, but are not sure whether 3115 * we have or will be receiving any beacons or data, so let's 3116 * schedule the timers again, just in case. 3117 */ 3118 ieee80211_sta_reset_beacon_monitor(sdata); 3119 3120 mod_timer(&ifmgd->conn_mon_timer, 3121 round_jiffies_up(jiffies + 3122 IEEE80211_CONNECTION_IDLE_TIME)); 3123 } 3124 3125 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3126 struct ieee80211_hdr *hdr, 3127 u16 tx_time) 3128 { 3129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3130 u16 tid; 3131 int ac; 3132 struct ieee80211_sta_tx_tspec *tx_tspec; 3133 unsigned long now = jiffies; 3134 3135 if (!ieee80211_is_data_qos(hdr->frame_control)) 3136 return; 3137 3138 tid = ieee80211_get_tid(hdr); 3139 ac = ieee80211_ac_from_tid(tid); 3140 tx_tspec = &ifmgd->tx_tspec[ac]; 3141 3142 if (likely(!tx_tspec->admitted_time)) 3143 return; 3144 3145 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3146 tx_tspec->consumed_tx_time = 0; 3147 tx_tspec->time_slice_start = now; 3148 3149 if (tx_tspec->downgraded) { 3150 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3151 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3152 &ifmgd->tx_tspec_wk, 0); 3153 } 3154 } 3155 3156 if (tx_tspec->downgraded) 3157 return; 3158 3159 tx_tspec->consumed_tx_time += tx_time; 3160 3161 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3162 tx_tspec->downgraded = true; 3163 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3164 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3165 &ifmgd->tx_tspec_wk, 0); 3166 } 3167 } 3168 3169 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3170 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3171 { 3172 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3173 3174 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3175 !sdata->u.mgd.probe_send_count) 3176 return; 3177 3178 if (ack) 3179 sdata->u.mgd.probe_send_count = 0; 3180 else 3181 sdata->u.mgd.nullfunc_failed = true; 3182 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3183 } 3184 3185 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3186 const u8 *src, const u8 *dst, 3187 const u8 *ssid, size_t ssid_len, 3188 struct ieee80211_channel *channel) 3189 { 3190 struct sk_buff *skb; 3191 3192 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3193 ssid, ssid_len, NULL, 0, 3194 IEEE80211_PROBE_FLAG_DIRECTED); 3195 if (skb) 3196 ieee80211_tx_skb(sdata, skb); 3197 } 3198 3199 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3200 { 3201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3202 u8 *dst = sdata->vif.cfg.ap_addr; 3203 u8 unicast_limit = max(1, max_probe_tries - 3); 3204 struct sta_info *sta; 3205 3206 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3207 3208 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3209 return; 3210 3211 /* 3212 * Try sending broadcast probe requests for the last three 3213 * probe requests after the first ones failed since some 3214 * buggy APs only support broadcast probe requests. 3215 */ 3216 if (ifmgd->probe_send_count >= unicast_limit) 3217 dst = NULL; 3218 3219 /* 3220 * When the hardware reports an accurate Tx ACK status, it's 3221 * better to send a nullfunc frame instead of a probe request, 3222 * as it will kick us off the AP quickly if we aren't associated 3223 * anymore. The timeout will be reset if the frame is ACKed by 3224 * the AP. 3225 */ 3226 ifmgd->probe_send_count++; 3227 3228 if (dst) { 3229 sta = sta_info_get(sdata, dst); 3230 if (!WARN_ON(!sta)) 3231 ieee80211_check_fast_rx(sta); 3232 } 3233 3234 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3235 ifmgd->nullfunc_failed = false; 3236 ieee80211_send_nullfunc(sdata->local, sdata, false); 3237 } else { 3238 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3239 sdata->vif.cfg.ssid, 3240 sdata->vif.cfg.ssid_len, 3241 sdata->deflink.u.mgd.bss->channel); 3242 } 3243 3244 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3245 run_again(sdata, ifmgd->probe_timeout); 3246 } 3247 3248 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3249 bool beacon) 3250 { 3251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3252 bool already = false; 3253 3254 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3255 3256 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3257 return; 3258 3259 if (!ieee80211_sdata_running(sdata)) 3260 return; 3261 3262 if (!ifmgd->associated) 3263 return; 3264 3265 if (sdata->local->tmp_channel || sdata->local->scanning) 3266 return; 3267 3268 if (sdata->local->suspending) { 3269 /* reschedule after resume */ 3270 ieee80211_reset_ap_probe(sdata); 3271 return; 3272 } 3273 3274 if (beacon) { 3275 mlme_dbg_ratelimited(sdata, 3276 "detected beacon loss from AP (missed %d beacons) - probing\n", 3277 beacon_loss_count); 3278 3279 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3280 } 3281 3282 /* 3283 * The driver/our work has already reported this event or the 3284 * connection monitoring has kicked in and we have already sent 3285 * a probe request. Or maybe the AP died and the driver keeps 3286 * reporting until we disassociate... 3287 * 3288 * In either case we have to ignore the current call to this 3289 * function (except for setting the correct probe reason bit) 3290 * because otherwise we would reset the timer every time and 3291 * never check whether we received a probe response! 3292 */ 3293 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3294 already = true; 3295 3296 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3297 3298 if (already) 3299 return; 3300 3301 ieee80211_recalc_ps(sdata->local); 3302 3303 ifmgd->probe_send_count = 0; 3304 ieee80211_mgd_probe_ap_send(sdata); 3305 } 3306 3307 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3308 struct ieee80211_vif *vif) 3309 { 3310 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3312 struct cfg80211_bss *cbss; 3313 struct sk_buff *skb; 3314 const struct element *ssid; 3315 int ssid_len; 3316 3317 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3318 3319 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3320 ieee80211_vif_is_mld(&sdata->vif))) 3321 return NULL; 3322 3323 if (ifmgd->associated) 3324 cbss = sdata->deflink.u.mgd.bss; 3325 else if (ifmgd->auth_data) 3326 cbss = ifmgd->auth_data->bss; 3327 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3328 cbss = ifmgd->assoc_data->link[0].bss; 3329 else 3330 return NULL; 3331 3332 rcu_read_lock(); 3333 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3334 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3335 "invalid SSID element (len=%d)", 3336 ssid ? ssid->datalen : -1)) 3337 ssid_len = 0; 3338 else 3339 ssid_len = ssid->datalen; 3340 3341 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3342 (u32) -1, cbss->channel, 3343 ssid->data, ssid_len, 3344 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3345 rcu_read_unlock(); 3346 3347 return skb; 3348 } 3349 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3350 3351 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3352 const u8 *buf, size_t len, bool tx, 3353 u16 reason, bool reconnect) 3354 { 3355 struct ieee80211_event event = { 3356 .type = MLME_EVENT, 3357 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3358 .u.mlme.reason = reason, 3359 }; 3360 3361 if (tx) 3362 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3363 else 3364 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3365 3366 drv_event_callback(sdata->local, sdata, &event); 3367 } 3368 3369 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3370 { 3371 struct ieee80211_local *local = sdata->local; 3372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3373 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3374 bool tx; 3375 3376 lockdep_assert_wiphy(local->hw.wiphy); 3377 3378 if (!ifmgd->associated) 3379 return; 3380 3381 /* in MLO assume we have a link where we can TX the frame */ 3382 tx = ieee80211_vif_is_mld(&sdata->vif) || 3383 !sdata->deflink.csa_block_tx; 3384 3385 if (!ifmgd->driver_disconnect) { 3386 unsigned int link_id; 3387 3388 /* 3389 * AP is probably out of range (or not reachable for another 3390 * reason) so remove the bss structs for that AP. In the case 3391 * of multi-link, it's not clear that all of them really are 3392 * out of range, but if they weren't the driver likely would 3393 * have switched to just have a single link active? 3394 */ 3395 for (link_id = 0; 3396 link_id < ARRAY_SIZE(sdata->link); 3397 link_id++) { 3398 struct ieee80211_link_data *link; 3399 3400 link = sdata_dereference(sdata->link[link_id], sdata); 3401 if (!link) 3402 continue; 3403 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3404 link->u.mgd.bss = NULL; 3405 } 3406 } 3407 3408 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3409 ifmgd->driver_disconnect ? 3410 WLAN_REASON_DEAUTH_LEAVING : 3411 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3412 tx, frame_buf); 3413 /* the other links will be destroyed */ 3414 sdata->vif.bss_conf.csa_active = false; 3415 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3416 if (sdata->deflink.csa_block_tx) { 3417 ieee80211_wake_vif_queues(local, sdata, 3418 IEEE80211_QUEUE_STOP_REASON_CSA); 3419 sdata->deflink.csa_block_tx = false; 3420 } 3421 3422 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3423 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3424 ifmgd->reconnect); 3425 ifmgd->reconnect = false; 3426 } 3427 3428 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3429 struct wiphy_work *work) 3430 { 3431 struct ieee80211_sub_if_data *sdata = 3432 container_of(work, struct ieee80211_sub_if_data, 3433 u.mgd.beacon_connection_loss_work); 3434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3435 3436 if (ifmgd->connection_loss) { 3437 sdata_info(sdata, "Connection to AP %pM lost\n", 3438 sdata->vif.cfg.ap_addr); 3439 __ieee80211_disconnect(sdata); 3440 ifmgd->connection_loss = false; 3441 } else if (ifmgd->driver_disconnect) { 3442 sdata_info(sdata, 3443 "Driver requested disconnection from AP %pM\n", 3444 sdata->vif.cfg.ap_addr); 3445 __ieee80211_disconnect(sdata); 3446 ifmgd->driver_disconnect = false; 3447 } else { 3448 if (ifmgd->associated) 3449 sdata->deflink.u.mgd.beacon_loss_count++; 3450 ieee80211_mgd_probe_ap(sdata, true); 3451 } 3452 } 3453 3454 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3455 struct wiphy_work *work) 3456 { 3457 struct ieee80211_sub_if_data *sdata = 3458 container_of(work, struct ieee80211_sub_if_data, 3459 u.mgd.csa_connection_drop_work); 3460 3461 __ieee80211_disconnect(sdata); 3462 } 3463 3464 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3465 { 3466 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3467 struct ieee80211_hw *hw = &sdata->local->hw; 3468 3469 trace_api_beacon_loss(sdata); 3470 3471 sdata->u.mgd.connection_loss = false; 3472 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3473 } 3474 EXPORT_SYMBOL(ieee80211_beacon_loss); 3475 3476 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3477 { 3478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3479 struct ieee80211_hw *hw = &sdata->local->hw; 3480 3481 trace_api_connection_loss(sdata); 3482 3483 sdata->u.mgd.connection_loss = true; 3484 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3485 } 3486 EXPORT_SYMBOL(ieee80211_connection_loss); 3487 3488 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3489 { 3490 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3491 struct ieee80211_hw *hw = &sdata->local->hw; 3492 3493 trace_api_disconnect(sdata, reconnect); 3494 3495 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3496 return; 3497 3498 sdata->u.mgd.driver_disconnect = true; 3499 sdata->u.mgd.reconnect = reconnect; 3500 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3501 } 3502 EXPORT_SYMBOL(ieee80211_disconnect); 3503 3504 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3505 bool assoc) 3506 { 3507 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3508 3509 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3510 3511 if (!assoc) { 3512 /* 3513 * we are not authenticated yet, the only timer that could be 3514 * running is the timeout for the authentication response which 3515 * which is not relevant anymore. 3516 */ 3517 del_timer_sync(&sdata->u.mgd.timer); 3518 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3519 3520 /* other links are destroyed */ 3521 sdata->deflink.u.mgd.conn_flags = 0; 3522 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3523 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3524 BSS_CHANGED_BSSID); 3525 sdata->u.mgd.flags = 0; 3526 3527 ieee80211_link_release_channel(&sdata->deflink); 3528 ieee80211_vif_set_links(sdata, 0, 0); 3529 } 3530 3531 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3532 kfree(auth_data); 3533 sdata->u.mgd.auth_data = NULL; 3534 } 3535 3536 enum assoc_status { 3537 ASSOC_SUCCESS, 3538 ASSOC_REJECTED, 3539 ASSOC_TIMEOUT, 3540 ASSOC_ABANDON, 3541 }; 3542 3543 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3544 enum assoc_status status) 3545 { 3546 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3547 3548 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3549 3550 if (status != ASSOC_SUCCESS) { 3551 /* 3552 * we are not associated yet, the only timer that could be 3553 * running is the timeout for the association response which 3554 * which is not relevant anymore. 3555 */ 3556 del_timer_sync(&sdata->u.mgd.timer); 3557 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3558 3559 sdata->deflink.u.mgd.conn_flags = 0; 3560 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3561 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3562 BSS_CHANGED_BSSID); 3563 sdata->u.mgd.flags = 0; 3564 sdata->vif.bss_conf.mu_mimo_owner = false; 3565 3566 if (status != ASSOC_REJECTED) { 3567 struct cfg80211_assoc_failure data = { 3568 .timeout = status == ASSOC_TIMEOUT, 3569 }; 3570 int i; 3571 3572 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3573 ARRAY_SIZE(assoc_data->link)); 3574 3575 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3576 data.bss[i] = assoc_data->link[i].bss; 3577 3578 if (ieee80211_vif_is_mld(&sdata->vif)) 3579 data.ap_mld_addr = assoc_data->ap_addr; 3580 3581 cfg80211_assoc_failure(sdata->dev, &data); 3582 } 3583 3584 ieee80211_link_release_channel(&sdata->deflink); 3585 ieee80211_vif_set_links(sdata, 0, 0); 3586 } 3587 3588 kfree(assoc_data); 3589 sdata->u.mgd.assoc_data = NULL; 3590 } 3591 3592 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3593 struct ieee80211_mgmt *mgmt, size_t len) 3594 { 3595 struct ieee80211_local *local = sdata->local; 3596 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3597 const struct element *challenge; 3598 u8 *pos; 3599 u32 tx_flags = 0; 3600 struct ieee80211_prep_tx_info info = { 3601 .subtype = IEEE80211_STYPE_AUTH, 3602 .link_id = auth_data->link_id, 3603 }; 3604 3605 pos = mgmt->u.auth.variable; 3606 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3607 len - (pos - (u8 *)mgmt)); 3608 if (!challenge) 3609 return; 3610 auth_data->expected_transaction = 4; 3611 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3612 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3613 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3614 IEEE80211_TX_INTFL_MLME_CONN_TX; 3615 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3616 (void *)challenge, 3617 challenge->datalen + sizeof(*challenge), 3618 auth_data->ap_addr, auth_data->ap_addr, 3619 auth_data->key, auth_data->key_len, 3620 auth_data->key_idx, tx_flags); 3621 } 3622 3623 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3624 { 3625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3626 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3627 struct sta_info *sta; 3628 3629 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3630 3631 sdata_info(sdata, "authenticated\n"); 3632 ifmgd->auth_data->done = true; 3633 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3634 ifmgd->auth_data->timeout_started = true; 3635 run_again(sdata, ifmgd->auth_data->timeout); 3636 3637 /* move station state to auth */ 3638 sta = sta_info_get(sdata, ap_addr); 3639 if (!sta) { 3640 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3641 return false; 3642 } 3643 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3644 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3645 return false; 3646 } 3647 3648 return true; 3649 } 3650 3651 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3652 struct ieee80211_mgmt *mgmt, size_t len) 3653 { 3654 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3655 u16 auth_alg, auth_transaction, status_code; 3656 struct ieee80211_event event = { 3657 .type = MLME_EVENT, 3658 .u.mlme.data = AUTH_EVENT, 3659 }; 3660 struct ieee80211_prep_tx_info info = { 3661 .subtype = IEEE80211_STYPE_AUTH, 3662 }; 3663 3664 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3665 3666 if (len < 24 + 6) 3667 return; 3668 3669 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3670 return; 3671 3672 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3673 return; 3674 3675 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3676 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3677 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3678 3679 if (auth_alg != ifmgd->auth_data->algorithm || 3680 (auth_alg != WLAN_AUTH_SAE && 3681 auth_transaction != ifmgd->auth_data->expected_transaction) || 3682 (auth_alg == WLAN_AUTH_SAE && 3683 (auth_transaction < ifmgd->auth_data->expected_transaction || 3684 auth_transaction > 2))) { 3685 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3686 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3687 auth_transaction, 3688 ifmgd->auth_data->expected_transaction); 3689 goto notify_driver; 3690 } 3691 3692 if (status_code != WLAN_STATUS_SUCCESS) { 3693 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3694 3695 if (auth_alg == WLAN_AUTH_SAE && 3696 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3697 (auth_transaction == 1 && 3698 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3699 status_code == WLAN_STATUS_SAE_PK)))) { 3700 /* waiting for userspace now */ 3701 ifmgd->auth_data->waiting = true; 3702 ifmgd->auth_data->timeout = 3703 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3704 ifmgd->auth_data->timeout_started = true; 3705 run_again(sdata, ifmgd->auth_data->timeout); 3706 goto notify_driver; 3707 } 3708 3709 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3710 mgmt->sa, status_code); 3711 ieee80211_destroy_auth_data(sdata, false); 3712 event.u.mlme.status = MLME_DENIED; 3713 event.u.mlme.reason = status_code; 3714 drv_event_callback(sdata->local, sdata, &event); 3715 goto notify_driver; 3716 } 3717 3718 switch (ifmgd->auth_data->algorithm) { 3719 case WLAN_AUTH_OPEN: 3720 case WLAN_AUTH_LEAP: 3721 case WLAN_AUTH_FT: 3722 case WLAN_AUTH_SAE: 3723 case WLAN_AUTH_FILS_SK: 3724 case WLAN_AUTH_FILS_SK_PFS: 3725 case WLAN_AUTH_FILS_PK: 3726 break; 3727 case WLAN_AUTH_SHARED_KEY: 3728 if (ifmgd->auth_data->expected_transaction != 4) { 3729 ieee80211_auth_challenge(sdata, mgmt, len); 3730 /* need another frame */ 3731 return; 3732 } 3733 break; 3734 default: 3735 WARN_ONCE(1, "invalid auth alg %d", 3736 ifmgd->auth_data->algorithm); 3737 goto notify_driver; 3738 } 3739 3740 event.u.mlme.status = MLME_SUCCESS; 3741 info.success = 1; 3742 drv_event_callback(sdata->local, sdata, &event); 3743 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3744 (auth_transaction == 2 && 3745 ifmgd->auth_data->expected_transaction == 2)) { 3746 if (!ieee80211_mark_sta_auth(sdata)) 3747 return; /* ignore frame -- wait for timeout */ 3748 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3749 auth_transaction == 2) { 3750 sdata_info(sdata, "SAE peer confirmed\n"); 3751 ifmgd->auth_data->peer_confirmed = true; 3752 } 3753 3754 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3755 notify_driver: 3756 drv_mgd_complete_tx(sdata->local, sdata, &info); 3757 } 3758 3759 #define case_WLAN(type) \ 3760 case WLAN_REASON_##type: return #type 3761 3762 const char *ieee80211_get_reason_code_string(u16 reason_code) 3763 { 3764 switch (reason_code) { 3765 case_WLAN(UNSPECIFIED); 3766 case_WLAN(PREV_AUTH_NOT_VALID); 3767 case_WLAN(DEAUTH_LEAVING); 3768 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3769 case_WLAN(DISASSOC_AP_BUSY); 3770 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3771 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3772 case_WLAN(DISASSOC_STA_HAS_LEFT); 3773 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3774 case_WLAN(DISASSOC_BAD_POWER); 3775 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3776 case_WLAN(INVALID_IE); 3777 case_WLAN(MIC_FAILURE); 3778 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3779 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3780 case_WLAN(IE_DIFFERENT); 3781 case_WLAN(INVALID_GROUP_CIPHER); 3782 case_WLAN(INVALID_PAIRWISE_CIPHER); 3783 case_WLAN(INVALID_AKMP); 3784 case_WLAN(UNSUPP_RSN_VERSION); 3785 case_WLAN(INVALID_RSN_IE_CAP); 3786 case_WLAN(IEEE8021X_FAILED); 3787 case_WLAN(CIPHER_SUITE_REJECTED); 3788 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3789 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3790 case_WLAN(DISASSOC_LOW_ACK); 3791 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3792 case_WLAN(QSTA_LEAVE_QBSS); 3793 case_WLAN(QSTA_NOT_USE); 3794 case_WLAN(QSTA_REQUIRE_SETUP); 3795 case_WLAN(QSTA_TIMEOUT); 3796 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3797 case_WLAN(MESH_PEER_CANCELED); 3798 case_WLAN(MESH_MAX_PEERS); 3799 case_WLAN(MESH_CONFIG); 3800 case_WLAN(MESH_CLOSE); 3801 case_WLAN(MESH_MAX_RETRIES); 3802 case_WLAN(MESH_CONFIRM_TIMEOUT); 3803 case_WLAN(MESH_INVALID_GTK); 3804 case_WLAN(MESH_INCONSISTENT_PARAM); 3805 case_WLAN(MESH_INVALID_SECURITY); 3806 case_WLAN(MESH_PATH_ERROR); 3807 case_WLAN(MESH_PATH_NOFORWARD); 3808 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3809 case_WLAN(MAC_EXISTS_IN_MBSS); 3810 case_WLAN(MESH_CHAN_REGULATORY); 3811 case_WLAN(MESH_CHAN); 3812 default: return "<unknown>"; 3813 } 3814 } 3815 3816 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3817 struct ieee80211_mgmt *mgmt, size_t len) 3818 { 3819 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3820 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3821 3822 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3823 3824 if (len < 24 + 2) 3825 return; 3826 3827 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3828 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3829 return; 3830 } 3831 3832 if (ifmgd->associated && 3833 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3834 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3835 sdata->vif.cfg.ap_addr, reason_code, 3836 ieee80211_get_reason_code_string(reason_code)); 3837 3838 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3839 3840 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3841 reason_code, false); 3842 return; 3843 } 3844 3845 if (ifmgd->assoc_data && 3846 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3847 sdata_info(sdata, 3848 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3849 ifmgd->assoc_data->ap_addr, reason_code, 3850 ieee80211_get_reason_code_string(reason_code)); 3851 3852 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3853 3854 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3855 return; 3856 } 3857 } 3858 3859 3860 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3861 struct ieee80211_mgmt *mgmt, size_t len) 3862 { 3863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3864 u16 reason_code; 3865 3866 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3867 3868 if (len < 24 + 2) 3869 return; 3870 3871 if (!ifmgd->associated || 3872 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3873 return; 3874 3875 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3876 3877 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3878 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3879 return; 3880 } 3881 3882 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3883 sdata->vif.cfg.ap_addr, reason_code, 3884 ieee80211_get_reason_code_string(reason_code)); 3885 3886 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3887 3888 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3889 false); 3890 } 3891 3892 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3893 u8 *supp_rates, unsigned int supp_rates_len, 3894 u32 *rates, u32 *basic_rates, 3895 bool *have_higher_than_11mbit, 3896 int *min_rate, int *min_rate_index) 3897 { 3898 int i, j; 3899 3900 for (i = 0; i < supp_rates_len; i++) { 3901 int rate = supp_rates[i] & 0x7f; 3902 bool is_basic = !!(supp_rates[i] & 0x80); 3903 3904 if ((rate * 5) > 110) 3905 *have_higher_than_11mbit = true; 3906 3907 /* 3908 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 3909 * selectors since they're not rates. 3910 * 3911 * Note: Even though the membership selector and the basic 3912 * rate flag share the same bit, they are not exactly 3913 * the same. 3914 */ 3915 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3916 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3917 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3918 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 3919 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3920 continue; 3921 3922 for (j = 0; j < sband->n_bitrates; j++) { 3923 struct ieee80211_rate *br; 3924 int brate; 3925 3926 br = &sband->bitrates[j]; 3927 3928 brate = DIV_ROUND_UP(br->bitrate, 5); 3929 if (brate == rate) { 3930 *rates |= BIT(j); 3931 if (is_basic) 3932 *basic_rates |= BIT(j); 3933 if ((rate * 5) < *min_rate) { 3934 *min_rate = rate * 5; 3935 *min_rate_index = j; 3936 } 3937 break; 3938 } 3939 } 3940 } 3941 } 3942 3943 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3944 struct ieee80211_supported_band *sband, 3945 const struct link_sta_info *link_sta, 3946 const struct ieee802_11_elems *elems) 3947 { 3948 const struct ieee80211_sta_he_cap *own_he_cap = 3949 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3950 3951 if (elems->ext_capab_len < 10) 3952 return false; 3953 3954 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3955 return false; 3956 3957 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3958 IEEE80211_HE_MAC_CAP0_TWT_RES && 3959 own_he_cap && 3960 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3961 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3962 } 3963 3964 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3965 struct ieee80211_supported_band *sband, 3966 struct ieee80211_link_data *link, 3967 struct link_sta_info *link_sta, 3968 struct ieee802_11_elems *elems) 3969 { 3970 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3971 3972 if (link->conf->twt_requester != twt) { 3973 link->conf->twt_requester = twt; 3974 return BSS_CHANGED_TWT; 3975 } 3976 return 0; 3977 } 3978 3979 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3980 struct ieee80211_bss_conf *bss_conf, 3981 struct ieee80211_supported_band *sband, 3982 struct link_sta_info *link_sta) 3983 { 3984 const struct ieee80211_sta_he_cap *own_he_cap = 3985 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3986 3987 return bss_conf->he_support && 3988 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3989 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3990 own_he_cap && 3991 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3992 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3993 } 3994 3995 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3996 struct link_sta_info *link_sta, 3997 struct cfg80211_bss *cbss, 3998 struct ieee80211_mgmt *mgmt, 3999 const u8 *elem_start, 4000 unsigned int elem_len, 4001 u64 *changed) 4002 { 4003 struct ieee80211_sub_if_data *sdata = link->sdata; 4004 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4005 struct ieee80211_bss_conf *bss_conf = link->conf; 4006 struct ieee80211_local *local = sdata->local; 4007 unsigned int link_id = link->link_id; 4008 struct ieee80211_elems_parse_params parse_params = { 4009 .start = elem_start, 4010 .len = elem_len, 4011 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4012 .from_ap = true, 4013 }; 4014 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4015 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4016 const struct cfg80211_bss_ies *bss_ies = NULL; 4017 struct ieee80211_supported_band *sband; 4018 struct ieee802_11_elems *elems; 4019 const __le16 prof_bss_param_ch_present = 4020 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4021 u16 capab_info; 4022 bool ret; 4023 4024 elems = ieee802_11_parse_elems_full(&parse_params); 4025 if (!elems) 4026 return false; 4027 4028 if (link_id == assoc_data->assoc_link_id) { 4029 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4030 4031 /* 4032 * we should not get to this flow unless the association was 4033 * successful, so set the status directly to success 4034 */ 4035 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4036 if (elems->ml_basic) { 4037 if (!(elems->ml_basic->control & 4038 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT))) { 4039 ret = false; 4040 goto out; 4041 } 4042 link->u.mgd.bss_param_ch_cnt = 4043 ieee80211_mle_get_bss_param_ch_cnt(elems->ml_basic); 4044 } 4045 } else if (!elems->prof || 4046 !(elems->prof->control & prof_bss_param_ch_present)) { 4047 ret = false; 4048 goto out; 4049 } else { 4050 const u8 *ptr = elems->prof->variable + 4051 elems->prof->sta_info_len - 1; 4052 4053 /* 4054 * During parsing, we validated that these fields exist, 4055 * otherwise elems->prof would have been set to NULL. 4056 */ 4057 capab_info = get_unaligned_le16(ptr); 4058 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4059 link->u.mgd.bss_param_ch_cnt = 4060 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4061 4062 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4063 link_info(link, "association response status code=%u\n", 4064 assoc_data->link[link_id].status); 4065 ret = true; 4066 goto out; 4067 } 4068 } 4069 4070 if (!is_s1g && !elems->supp_rates) { 4071 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4072 ret = false; 4073 goto out; 4074 } 4075 4076 link->u.mgd.tdls_chan_switch_prohibited = 4077 elems->ext_capab && elems->ext_capab_len >= 5 && 4078 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4079 4080 /* 4081 * Some APs are erroneously not including some information in their 4082 * (re)association response frames. Try to recover by using the data 4083 * from the beacon or probe response. This seems to afflict mobile 4084 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4085 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4086 */ 4087 if (!is_6ghz && 4088 ((assoc_data->wmm && !elems->wmm_param) || 4089 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4090 (!elems->ht_cap_elem || !elems->ht_operation)) || 4091 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4092 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4093 const struct cfg80211_bss_ies *ies; 4094 struct ieee802_11_elems *bss_elems; 4095 4096 rcu_read_lock(); 4097 ies = rcu_dereference(cbss->ies); 4098 if (ies) 4099 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4100 GFP_ATOMIC); 4101 rcu_read_unlock(); 4102 if (!bss_ies) { 4103 ret = false; 4104 goto out; 4105 } 4106 4107 parse_params.start = bss_ies->data; 4108 parse_params.len = bss_ies->len; 4109 parse_params.bss = cbss; 4110 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4111 if (!bss_elems) { 4112 ret = false; 4113 goto out; 4114 } 4115 4116 if (assoc_data->wmm && 4117 !elems->wmm_param && bss_elems->wmm_param) { 4118 elems->wmm_param = bss_elems->wmm_param; 4119 sdata_info(sdata, 4120 "AP bug: WMM param missing from AssocResp\n"); 4121 } 4122 4123 /* 4124 * Also check if we requested HT/VHT, otherwise the AP doesn't 4125 * have to include the IEs in the (re)association response. 4126 */ 4127 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4128 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4129 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4130 sdata_info(sdata, 4131 "AP bug: HT capability missing from AssocResp\n"); 4132 } 4133 if (!elems->ht_operation && bss_elems->ht_operation && 4134 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4135 elems->ht_operation = bss_elems->ht_operation; 4136 sdata_info(sdata, 4137 "AP bug: HT operation missing from AssocResp\n"); 4138 } 4139 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4140 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4141 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4142 sdata_info(sdata, 4143 "AP bug: VHT capa missing from AssocResp\n"); 4144 } 4145 if (!elems->vht_operation && bss_elems->vht_operation && 4146 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4147 elems->vht_operation = bss_elems->vht_operation; 4148 sdata_info(sdata, 4149 "AP bug: VHT operation missing from AssocResp\n"); 4150 } 4151 4152 kfree(bss_elems); 4153 } 4154 4155 /* 4156 * We previously checked these in the beacon/probe response, so 4157 * they should be present here. This is just a safety net. 4158 */ 4159 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4160 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4161 sdata_info(sdata, 4162 "HT AP is missing WMM params or HT capability/operation\n"); 4163 ret = false; 4164 goto out; 4165 } 4166 4167 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4168 (!elems->vht_cap_elem || !elems->vht_operation)) { 4169 sdata_info(sdata, 4170 "VHT AP is missing VHT capability/operation\n"); 4171 ret = false; 4172 goto out; 4173 } 4174 4175 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4176 !elems->he_6ghz_capa) { 4177 sdata_info(sdata, 4178 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4179 ret = false; 4180 goto out; 4181 } 4182 4183 if (WARN_ON(!link->conf->chandef.chan)) { 4184 ret = false; 4185 goto out; 4186 } 4187 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4188 4189 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4190 (!elems->he_cap || !elems->he_operation)) { 4191 sdata_info(sdata, 4192 "HE AP is missing HE capability/operation\n"); 4193 ret = false; 4194 goto out; 4195 } 4196 4197 /* Set up internal HT/VHT capabilities */ 4198 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4199 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4200 elems->ht_cap_elem, 4201 link_sta); 4202 4203 if (elems->vht_cap_elem && 4204 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4205 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4206 const struct cfg80211_bss_ies *ies; 4207 4208 /* 4209 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4210 * too large maximum MPDU length in the association response 4211 * (indicating 12k) that it cannot actually process ... 4212 * Work around that. 4213 */ 4214 rcu_read_lock(); 4215 ies = rcu_dereference(cbss->ies); 4216 if (ies) { 4217 const struct element *elem; 4218 4219 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4220 ies->data, ies->len); 4221 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4222 bss_vht_cap = (const void *)elem->data; 4223 } 4224 4225 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4226 elems->vht_cap_elem, 4227 bss_vht_cap, link_sta); 4228 rcu_read_unlock(); 4229 } 4230 4231 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4232 elems->he_cap) { 4233 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4234 elems->he_cap, 4235 elems->he_cap_len, 4236 elems->he_6ghz_capa, 4237 link_sta); 4238 4239 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4240 if (elems->rsnx && elems->rsnx_len && 4241 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4242 wiphy_ext_feature_isset(local->hw.wiphy, 4243 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4244 bss_conf->twt_protected = true; 4245 else 4246 bss_conf->twt_protected = false; 4247 4248 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4249 link_sta, elems); 4250 4251 if (elems->eht_operation && elems->eht_cap && 4252 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4253 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4254 elems->he_cap, 4255 elems->he_cap_len, 4256 elems->eht_cap, 4257 elems->eht_cap_len, 4258 link_sta); 4259 4260 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4261 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4262 } else { 4263 bss_conf->eht_support = false; 4264 } 4265 } else { 4266 bss_conf->he_support = false; 4267 bss_conf->twt_requester = false; 4268 bss_conf->twt_protected = false; 4269 bss_conf->eht_support = false; 4270 } 4271 4272 bss_conf->twt_broadcast = 4273 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4274 4275 if (bss_conf->he_support) { 4276 bss_conf->he_bss_color.color = 4277 le32_get_bits(elems->he_operation->he_oper_params, 4278 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4279 bss_conf->he_bss_color.partial = 4280 le32_get_bits(elems->he_operation->he_oper_params, 4281 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4282 bss_conf->he_bss_color.enabled = 4283 !le32_get_bits(elems->he_operation->he_oper_params, 4284 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4285 4286 if (bss_conf->he_bss_color.enabled) 4287 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4288 4289 bss_conf->htc_trig_based_pkt_ext = 4290 le32_get_bits(elems->he_operation->he_oper_params, 4291 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4292 bss_conf->frame_time_rts_th = 4293 le32_get_bits(elems->he_operation->he_oper_params, 4294 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4295 4296 bss_conf->uora_exists = !!elems->uora_element; 4297 if (elems->uora_element) 4298 bss_conf->uora_ocw_range = elems->uora_element[0]; 4299 4300 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4301 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4302 /* TODO: OPEN: what happens if BSS color disable is set? */ 4303 } 4304 4305 if (cbss->transmitted_bss) { 4306 bss_conf->nontransmitted = true; 4307 ether_addr_copy(bss_conf->transmitter_bssid, 4308 cbss->transmitted_bss->bssid); 4309 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4310 bss_conf->bssid_index = cbss->bssid_index; 4311 } 4312 4313 /* 4314 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4315 * in their association response, so ignore that data for our own 4316 * configuration. If it changed since the last beacon, we'll get the 4317 * next beacon and update then. 4318 */ 4319 4320 /* 4321 * If an operating mode notification IE is present, override the 4322 * NSS calculation (that would be done in rate_control_rate_init()) 4323 * and use the # of streams from that element. 4324 */ 4325 if (elems->opmode_notif && 4326 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4327 u8 nss; 4328 4329 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4330 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4331 nss += 1; 4332 link_sta->pub->rx_nss = nss; 4333 } 4334 4335 /* 4336 * Always handle WMM once after association regardless 4337 * of the first value the AP uses. Setting -1 here has 4338 * that effect because the AP values is an unsigned 4339 * 4-bit value. 4340 */ 4341 link->u.mgd.wmm_last_param_set = -1; 4342 link->u.mgd.mu_edca_last_param_set = -1; 4343 4344 if (link->u.mgd.disable_wmm_tracking) { 4345 ieee80211_set_wmm_default(link, false, false); 4346 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4347 elems->wmm_param_len, 4348 elems->mu_edca_param_set)) { 4349 /* still enable QoS since we might have HT/VHT */ 4350 ieee80211_set_wmm_default(link, false, true); 4351 /* disable WMM tracking in this case to disable 4352 * tracking WMM parameter changes in the beacon if 4353 * the parameters weren't actually valid. Doing so 4354 * avoids changing parameters very strangely when 4355 * the AP is going back and forth between valid and 4356 * invalid parameters. 4357 */ 4358 link->u.mgd.disable_wmm_tracking = true; 4359 } 4360 4361 if (elems->max_idle_period_ie) { 4362 bss_conf->max_idle_period = 4363 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4364 bss_conf->protected_keep_alive = 4365 !!(elems->max_idle_period_ie->idle_options & 4366 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4367 *changed |= BSS_CHANGED_KEEP_ALIVE; 4368 } else { 4369 bss_conf->max_idle_period = 0; 4370 bss_conf->protected_keep_alive = false; 4371 } 4372 4373 /* set assoc capability (AID was already set earlier), 4374 * ieee80211_set_associated() will tell the driver */ 4375 bss_conf->assoc_capability = capab_info; 4376 4377 ret = true; 4378 out: 4379 kfree(elems); 4380 kfree(bss_ies); 4381 return ret; 4382 } 4383 4384 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4385 struct sta_info *sta, 4386 struct link_sta_info *link_sta, 4387 struct cfg80211_bss *cbss) 4388 { 4389 struct ieee80211_sub_if_data *sdata = link->sdata; 4390 struct ieee80211_local *local = sdata->local; 4391 struct ieee80211_bss *bss = (void *)cbss->priv; 4392 u32 rates = 0, basic_rates = 0; 4393 bool have_higher_than_11mbit = false; 4394 int min_rate = INT_MAX, min_rate_index = -1; 4395 struct ieee80211_supported_band *sband; 4396 4397 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4398 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4399 4400 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4401 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4402 ieee80211_s1g_sta_rate_init(sta); 4403 return 0; 4404 } 4405 4406 sband = local->hw.wiphy->bands[cbss->channel->band]; 4407 4408 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4409 &rates, &basic_rates, &have_higher_than_11mbit, 4410 &min_rate, &min_rate_index); 4411 4412 /* 4413 * This used to be a workaround for basic rates missing 4414 * in the association response frame. Now that we no 4415 * longer use the basic rates from there, it probably 4416 * doesn't happen any more, but keep the workaround so 4417 * in case some *other* APs are buggy in different ways 4418 * we can connect -- with a warning. 4419 * Allow this workaround only in case the AP provided at least 4420 * one rate. 4421 */ 4422 if (min_rate_index < 0) { 4423 link_info(link, "No legacy rates in association response\n"); 4424 return -EINVAL; 4425 } else if (!basic_rates) { 4426 link_info(link, "No basic rates, using min rate instead\n"); 4427 basic_rates = BIT(min_rate_index); 4428 } 4429 4430 if (rates) 4431 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4432 else 4433 link_info(link, "No rates found, keeping mandatory only\n"); 4434 4435 link->conf->basic_rates = basic_rates; 4436 4437 /* cf. IEEE 802.11 9.2.12 */ 4438 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4439 have_higher_than_11mbit; 4440 4441 return 0; 4442 } 4443 4444 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4445 struct cfg80211_bss *cbss) 4446 { 4447 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4448 const struct element *ht_cap_elem, *vht_cap_elem; 4449 const struct cfg80211_bss_ies *ies; 4450 const struct ieee80211_ht_cap *ht_cap; 4451 const struct ieee80211_vht_cap *vht_cap; 4452 const struct ieee80211_he_cap_elem *he_cap; 4453 const struct element *he_cap_elem; 4454 u16 mcs_80_map, mcs_160_map; 4455 int i, mcs_nss_size; 4456 bool support_160; 4457 u8 chains = 1; 4458 4459 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4460 return chains; 4461 4462 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4463 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4464 ht_cap = (void *)ht_cap_elem->data; 4465 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4466 /* 4467 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4468 * "Tx Unequal Modulation Supported" fields. 4469 */ 4470 } 4471 4472 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4473 return chains; 4474 4475 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4476 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4477 u8 nss; 4478 u16 tx_mcs_map; 4479 4480 vht_cap = (void *)vht_cap_elem->data; 4481 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4482 for (nss = 8; nss > 0; nss--) { 4483 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4484 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4485 break; 4486 } 4487 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4488 chains = max(chains, nss); 4489 } 4490 4491 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4492 return chains; 4493 4494 ies = rcu_dereference(cbss->ies); 4495 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4496 ies->data, ies->len); 4497 4498 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4499 return chains; 4500 4501 /* skip one byte ext_tag_id */ 4502 he_cap = (void *)(he_cap_elem->data + 1); 4503 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4504 4505 /* invalid HE IE */ 4506 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4507 return chains; 4508 4509 /* mcs_nss is right after he_cap info */ 4510 he_mcs_nss_supp = (void *)(he_cap + 1); 4511 4512 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4513 4514 for (i = 7; i >= 0; i--) { 4515 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4516 4517 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4518 chains = max_t(u8, chains, i + 1); 4519 break; 4520 } 4521 } 4522 4523 support_160 = he_cap->phy_cap_info[0] & 4524 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4525 4526 if (!support_160) 4527 return chains; 4528 4529 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4530 for (i = 7; i >= 0; i--) { 4531 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4532 4533 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4534 chains = max_t(u8, chains, i + 1); 4535 break; 4536 } 4537 } 4538 4539 return chains; 4540 } 4541 4542 static bool 4543 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4544 const struct cfg80211_bss_ies *ies, 4545 const struct ieee80211_he_operation *he_op) 4546 { 4547 const struct element *he_cap_elem; 4548 const struct ieee80211_he_cap_elem *he_cap; 4549 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4550 u16 mcs_80_map_tx, mcs_80_map_rx; 4551 u16 ap_min_req_set; 4552 int mcs_nss_size; 4553 int nss; 4554 4555 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4556 ies->data, ies->len); 4557 4558 if (!he_cap_elem) 4559 return false; 4560 4561 /* invalid HE IE */ 4562 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4563 sdata_info(sdata, 4564 "Invalid HE elem, Disable HE\n"); 4565 return false; 4566 } 4567 4568 /* skip one byte ext_tag_id */ 4569 he_cap = (void *)(he_cap_elem->data + 1); 4570 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4571 4572 /* invalid HE IE */ 4573 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4574 sdata_info(sdata, 4575 "Invalid HE elem with nss size, Disable HE\n"); 4576 return false; 4577 } 4578 4579 /* mcs_nss is right after he_cap info */ 4580 he_mcs_nss_supp = (void *)(he_cap + 1); 4581 4582 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4583 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4584 4585 /* P802.11-REVme/D0.3 4586 * 27.1.1 Introduction to the HE PHY 4587 * ... 4588 * An HE STA shall support the following features: 4589 * ... 4590 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4591 * supported channel widths for HE SU PPDUs 4592 */ 4593 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4594 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4595 sdata_info(sdata, 4596 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4597 mcs_80_map_tx, mcs_80_map_rx); 4598 return false; 4599 } 4600 4601 if (!he_op) 4602 return true; 4603 4604 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4605 4606 /* 4607 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4608 * zeroes, which is nonsense, and completely inconsistent with itself 4609 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4610 */ 4611 if (!ap_min_req_set) 4612 return true; 4613 4614 /* make sure the AP is consistent with itself 4615 * 4616 * P802.11-REVme/D0.3 4617 * 26.17.1 Basic HE BSS operation 4618 * 4619 * A STA that is operating in an HE BSS shall be able to receive and 4620 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4621 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4622 * MLME-START.request primitive and shall be able to receive at each of 4623 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4624 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4625 * primitive 4626 */ 4627 for (nss = 8; nss > 0; nss--) { 4628 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4629 u8 ap_rx_val; 4630 u8 ap_tx_val; 4631 4632 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4633 continue; 4634 4635 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4636 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4637 4638 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4639 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4640 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4641 sdata_info(sdata, 4642 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4643 nss, ap_rx_val, ap_rx_val, ap_op_val); 4644 return false; 4645 } 4646 } 4647 4648 return true; 4649 } 4650 4651 static bool 4652 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4653 struct ieee80211_supported_band *sband, 4654 const struct ieee80211_he_operation *he_op) 4655 { 4656 const struct ieee80211_sta_he_cap *sta_he_cap = 4657 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4658 u16 ap_min_req_set; 4659 int i; 4660 4661 if (!sta_he_cap || !he_op) 4662 return false; 4663 4664 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4665 4666 /* 4667 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4668 * zeroes, which is nonsense, and completely inconsistent with itself 4669 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4670 */ 4671 if (!ap_min_req_set) 4672 return true; 4673 4674 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4675 for (i = 0; i < 3; i++) { 4676 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4677 &sta_he_cap->he_mcs_nss_supp; 4678 u16 sta_mcs_map_rx = 4679 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4680 u16 sta_mcs_map_tx = 4681 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4682 u8 nss; 4683 bool verified = true; 4684 4685 /* 4686 * For each band there is a maximum of 8 spatial streams 4687 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4688 * of 2 bits per NSS (1-8), with the values defined in enum 4689 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4690 * capabilities aren't less than the AP's minimum requirements 4691 * for this HE BSS per SS. 4692 * It is enough to find one such band that meets the reqs. 4693 */ 4694 for (nss = 8; nss > 0; nss--) { 4695 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4696 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4697 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4698 4699 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4700 continue; 4701 4702 /* 4703 * Make sure the HE AP doesn't require MCSs that aren't 4704 * supported by the client as required by spec 4705 * 4706 * P802.11-REVme/D0.3 4707 * 26.17.1 Basic HE BSS operation 4708 * 4709 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4710 * a BSS, unless it supports (i.e., is able to both transmit and 4711 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4712 * HE-MCS and NSS set. 4713 */ 4714 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4715 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4716 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4717 verified = false; 4718 break; 4719 } 4720 } 4721 4722 if (verified) 4723 return true; 4724 } 4725 4726 /* If here, STA doesn't meet AP's HE min requirements */ 4727 return false; 4728 } 4729 4730 static u8 4731 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 4732 const struct ieee80211_sta_eht_cap *sta_eht_cap, 4733 unsigned int idx, int bw) 4734 { 4735 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 4736 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 4737 4738 /* handle us being a 20 MHz-only EHT STA - with four values 4739 * for MCS 0-7, 8-9, 10-11, 12-13. 4740 */ 4741 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 4742 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 4743 4744 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 4745 if (idx > 0) 4746 idx--; 4747 4748 switch (bw) { 4749 case 0: 4750 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 4751 case 1: 4752 if (!(he_phy_cap0 & 4753 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 4754 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 4755 return 0xff; /* pass check */ 4756 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 4757 case 2: 4758 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 4759 return 0xff; /* pass check */ 4760 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 4761 } 4762 4763 WARN_ON(1); 4764 return 0; 4765 } 4766 4767 static bool 4768 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 4769 struct ieee80211_supported_band *sband, 4770 const struct ieee80211_eht_operation *eht_op) 4771 { 4772 const struct ieee80211_sta_he_cap *sta_he_cap = 4773 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4774 const struct ieee80211_sta_eht_cap *sta_eht_cap = 4775 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4776 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 4777 unsigned int i; 4778 4779 if (!sta_he_cap || !sta_eht_cap || !eht_op) 4780 return false; 4781 4782 req = &eht_op->basic_mcs_nss; 4783 4784 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 4785 u8 req_rx_nss, req_tx_nss; 4786 unsigned int bw; 4787 4788 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4789 IEEE80211_EHT_MCS_NSS_RX); 4790 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4791 IEEE80211_EHT_MCS_NSS_TX); 4792 4793 for (bw = 0; bw < 3; bw++) { 4794 u8 have, have_rx_nss, have_tx_nss; 4795 4796 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 4797 sta_eht_cap, 4798 i, bw); 4799 have_rx_nss = u8_get_bits(have, 4800 IEEE80211_EHT_MCS_NSS_RX); 4801 have_tx_nss = u8_get_bits(have, 4802 IEEE80211_EHT_MCS_NSS_TX); 4803 4804 if (req_rx_nss > have_rx_nss || 4805 req_tx_nss > have_tx_nss) 4806 return false; 4807 } 4808 } 4809 4810 return true; 4811 } 4812 4813 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4814 struct ieee80211_link_data *link, 4815 struct cfg80211_bss *cbss, 4816 bool mlo, 4817 ieee80211_conn_flags_t *conn_flags) 4818 { 4819 struct ieee80211_local *local = sdata->local; 4820 const struct ieee80211_ht_cap *ht_cap = NULL; 4821 const struct ieee80211_ht_operation *ht_oper = NULL; 4822 const struct ieee80211_vht_operation *vht_oper = NULL; 4823 const struct ieee80211_he_operation *he_oper = NULL; 4824 const struct ieee80211_eht_operation *eht_oper = NULL; 4825 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4826 struct ieee80211_supported_band *sband; 4827 struct cfg80211_chan_def chandef; 4828 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4829 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4830 bool supports_mlo = false; 4831 struct ieee80211_bss *bss = (void *)cbss->priv; 4832 struct ieee80211_elems_parse_params parse_params = { 4833 .link_id = -1, 4834 .from_ap = true, 4835 }; 4836 struct ieee802_11_elems *elems; 4837 const struct cfg80211_bss_ies *ies; 4838 int ret; 4839 u32 i; 4840 bool have_80mhz; 4841 4842 lockdep_assert_wiphy(local->hw.wiphy); 4843 4844 rcu_read_lock(); 4845 4846 ies = rcu_dereference(cbss->ies); 4847 parse_params.start = ies->data; 4848 parse_params.len = ies->len; 4849 elems = ieee802_11_parse_elems_full(&parse_params); 4850 if (!elems) { 4851 rcu_read_unlock(); 4852 return -ENOMEM; 4853 } 4854 4855 sband = local->hw.wiphy->bands[cbss->channel->band]; 4856 4857 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4858 IEEE80211_CONN_DISABLE_80P80MHZ | 4859 IEEE80211_CONN_DISABLE_160MHZ); 4860 4861 /* disable HT/VHT/HE if we don't support them */ 4862 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4863 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4864 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4865 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4866 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4867 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4868 } 4869 4870 if (!sband->vht_cap.vht_supported && is_5ghz) { 4871 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4872 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4873 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4874 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4875 } 4876 4877 if (!ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 4878 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4879 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4880 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4881 } 4882 4883 if (!ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) { 4884 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4885 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4886 } 4887 4888 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4889 ht_oper = elems->ht_operation; 4890 ht_cap = elems->ht_cap_elem; 4891 4892 if (!ht_cap) { 4893 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4894 ht_oper = NULL; 4895 } 4896 } 4897 4898 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4899 vht_oper = elems->vht_operation; 4900 if (vht_oper && !ht_oper) { 4901 vht_oper = NULL; 4902 sdata_info(sdata, 4903 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4904 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4905 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4906 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4907 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4908 } 4909 4910 if (!elems->vht_cap_elem) { 4911 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4912 vht_oper = NULL; 4913 } 4914 } 4915 4916 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4917 he_oper = elems->he_operation; 4918 4919 if (link && is_6ghz) { 4920 struct ieee80211_bss_conf *bss_conf; 4921 u8 j = 0; 4922 4923 bss_conf = link->conf; 4924 4925 if (elems->pwr_constr_elem) 4926 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4927 4928 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4929 ARRAY_SIZE(elems->tx_pwr_env)); 4930 4931 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4932 if (elems->tx_pwr_env_len[i] > 4933 sizeof(bss_conf->tx_pwr_env[j])) 4934 continue; 4935 4936 bss_conf->tx_pwr_env_num++; 4937 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4938 elems->tx_pwr_env_len[i]); 4939 j++; 4940 } 4941 } 4942 4943 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4944 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4945 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4946 IEEE80211_CONN_DISABLE_EHT; 4947 } 4948 4949 /* 4950 * EHT requires HE to be supported as well. Specifically for 6 GHz 4951 * channels, the operation channel information can only be deduced from 4952 * both the 6 GHz operation information (from the HE operation IE) and 4953 * EHT operation. 4954 */ 4955 if (!(*conn_flags & 4956 (IEEE80211_CONN_DISABLE_HE | 4957 IEEE80211_CONN_DISABLE_EHT)) && 4958 he_oper) { 4959 const struct cfg80211_bss_ies *cbss_ies; 4960 const struct element *eht_ml_elem; 4961 const u8 *eht_oper_ie; 4962 4963 cbss_ies = rcu_dereference(cbss->ies); 4964 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4965 cbss_ies->data, cbss_ies->len); 4966 if (eht_oper_ie && eht_oper_ie[1] >= 4967 1 + sizeof(struct ieee80211_eht_operation)) 4968 eht_oper = (void *)(eht_oper_ie + 3); 4969 else 4970 eht_oper = NULL; 4971 4972 if (!ieee80211_verify_sta_eht_mcs_support(sdata, sband, eht_oper)) 4973 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4974 4975 eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 4976 cbss_ies->data, cbss_ies->len); 4977 4978 /* data + 1 / datalen - 1 since it's an extended element */ 4979 if (!(*conn_flags & IEEE80211_CONN_DISABLE_EHT) && 4980 eht_ml_elem && 4981 ieee80211_mle_type_ok(eht_ml_elem->data + 1, 4982 IEEE80211_ML_CONTROL_TYPE_BASIC, 4983 eht_ml_elem->datalen - 1)) { 4984 supports_mlo = true; 4985 4986 sdata->vif.cfg.eml_cap = 4987 ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1); 4988 sdata->vif.cfg.eml_med_sync_delay = 4989 ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1); 4990 } 4991 } 4992 4993 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4994 have_80mhz = false; 4995 for (i = 0; i < sband->n_channels; i++) { 4996 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4997 IEEE80211_CHAN_NO_80MHZ)) 4998 continue; 4999 5000 have_80mhz = true; 5001 break; 5002 } 5003 5004 if (!have_80mhz) { 5005 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 5006 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 5007 } 5008 5009 if (sband->band == NL80211_BAND_S1GHZ) { 5010 s1g_oper = elems->s1g_oper; 5011 if (!s1g_oper) 5012 sdata_info(sdata, 5013 "AP missing S1G operation element?\n"); 5014 } 5015 5016 *conn_flags |= 5017 ieee80211_determine_chantype(sdata, link, *conn_flags, 5018 sband, 5019 cbss->channel, 5020 bss->vht_cap_info, 5021 ht_oper, vht_oper, 5022 he_oper, eht_oper, 5023 s1g_oper, 5024 &chandef, false); 5025 5026 if (link) 5027 link->needed_rx_chains = 5028 min(ieee80211_max_rx_chains(link, cbss), 5029 local->rx_chains); 5030 5031 rcu_read_unlock(); 5032 /* the element data was RCU protected so no longer valid anyway */ 5033 kfree(elems); 5034 elems = NULL; 5035 5036 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 5037 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5038 return -EINVAL; 5039 } 5040 5041 if (mlo && !supports_mlo) { 5042 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5043 return -EINVAL; 5044 } 5045 5046 if (!link) 5047 return 0; 5048 5049 /* 5050 * If this fails (possibly due to channel context sharing 5051 * on incompatible channels, e.g. 80+80 and 160 sharing the 5052 * same control channel) try to use a smaller bandwidth. 5053 */ 5054 ret = ieee80211_link_use_channel(link, &chandef, 5055 IEEE80211_CHANCTX_SHARED); 5056 5057 /* don't downgrade for 5 and 10 MHz channels, though. */ 5058 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5059 chandef.width == NL80211_CHAN_WIDTH_10) 5060 goto out; 5061 5062 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5063 *conn_flags |= 5064 ieee80211_chandef_downgrade(&chandef); 5065 ret = ieee80211_link_use_channel(link, &chandef, 5066 IEEE80211_CHANCTX_SHARED); 5067 } 5068 out: 5069 return ret; 5070 } 5071 5072 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5073 u8 *dtim_count, u8 *dtim_period) 5074 { 5075 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5076 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5077 ies->len); 5078 const struct ieee80211_tim_ie *tim = NULL; 5079 const struct ieee80211_bssid_index *idx; 5080 bool valid = tim_ie && tim_ie[1] >= 2; 5081 5082 if (valid) 5083 tim = (void *)(tim_ie + 2); 5084 5085 if (dtim_count) 5086 *dtim_count = valid ? tim->dtim_count : 0; 5087 5088 if (dtim_period) 5089 *dtim_period = valid ? tim->dtim_period : 0; 5090 5091 /* Check if value is overridden by non-transmitted profile */ 5092 if (!idx_ie || idx_ie[1] < 3) 5093 return valid; 5094 5095 idx = (void *)(idx_ie + 2); 5096 5097 if (dtim_count) 5098 *dtim_count = idx->dtim_count; 5099 5100 if (dtim_period) 5101 *dtim_period = idx->dtim_period; 5102 5103 return true; 5104 } 5105 5106 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5107 struct ieee80211_mgmt *mgmt, 5108 struct ieee802_11_elems *elems, 5109 const u8 *elem_start, unsigned int elem_len) 5110 { 5111 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5112 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5113 struct ieee80211_local *local = sdata->local; 5114 unsigned int link_id; 5115 struct sta_info *sta; 5116 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5117 u16 valid_links = 0, dormant_links = 0; 5118 int err; 5119 5120 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5121 /* 5122 * station info was already allocated and inserted before 5123 * the association and should be available to us 5124 */ 5125 sta = sta_info_get(sdata, assoc_data->ap_addr); 5126 if (WARN_ON(!sta)) 5127 goto out_err; 5128 5129 if (ieee80211_vif_is_mld(&sdata->vif)) { 5130 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5131 if (!assoc_data->link[link_id].bss) 5132 continue; 5133 5134 valid_links |= BIT(link_id); 5135 if (assoc_data->link[link_id].disabled) 5136 dormant_links |= BIT(link_id); 5137 5138 if (link_id != assoc_data->assoc_link_id) { 5139 err = ieee80211_sta_allocate_link(sta, link_id); 5140 if (err) 5141 goto out_err; 5142 } 5143 } 5144 5145 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5146 } 5147 5148 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5149 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5150 struct ieee80211_link_data *link; 5151 struct link_sta_info *link_sta; 5152 5153 if (!cbss) 5154 continue; 5155 5156 link = sdata_dereference(sdata->link[link_id], sdata); 5157 if (WARN_ON(!link)) 5158 goto out_err; 5159 5160 if (ieee80211_vif_is_mld(&sdata->vif)) 5161 link_info(link, 5162 "local address %pM, AP link address %pM%s\n", 5163 link->conf->addr, 5164 assoc_data->link[link_id].bss->bssid, 5165 link_id == assoc_data->assoc_link_id ? 5166 " (assoc)" : ""); 5167 5168 link_sta = rcu_dereference_protected(sta->link[link_id], 5169 lockdep_is_held(&local->hw.wiphy->mtx)); 5170 if (WARN_ON(!link_sta)) 5171 goto out_err; 5172 5173 if (!link->u.mgd.have_beacon) { 5174 const struct cfg80211_bss_ies *ies; 5175 5176 rcu_read_lock(); 5177 ies = rcu_dereference(cbss->beacon_ies); 5178 if (ies) 5179 link->u.mgd.have_beacon = true; 5180 else 5181 ies = rcu_dereference(cbss->ies); 5182 ieee80211_get_dtim(ies, 5183 &link->conf->sync_dtim_count, 5184 &link->u.mgd.dtim_period); 5185 link->conf->beacon_int = cbss->beacon_interval; 5186 rcu_read_unlock(); 5187 } 5188 5189 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5190 5191 if (link_id != assoc_data->assoc_link_id) { 5192 err = ieee80211_prep_channel(sdata, link, cbss, true, 5193 &link->u.mgd.conn_flags); 5194 if (err) { 5195 link_info(link, "prep_channel failed\n"); 5196 goto out_err; 5197 } 5198 } 5199 5200 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5201 assoc_data->link[link_id].bss); 5202 if (err) 5203 goto out_err; 5204 5205 if (!ieee80211_assoc_config_link(link, link_sta, 5206 assoc_data->link[link_id].bss, 5207 mgmt, elem_start, elem_len, 5208 &changed[link_id])) 5209 goto out_err; 5210 5211 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5212 valid_links &= ~BIT(link_id); 5213 ieee80211_sta_remove_link(sta, link_id); 5214 continue; 5215 } 5216 5217 if (link_id != assoc_data->assoc_link_id) { 5218 err = ieee80211_sta_activate_link(sta, link_id); 5219 if (err) 5220 goto out_err; 5221 } 5222 } 5223 5224 /* links might have changed due to rejected ones, set them again */ 5225 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5226 5227 rate_control_rate_init(sta); 5228 5229 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5230 set_sta_flag(sta, WLAN_STA_MFP); 5231 sta->sta.mfp = true; 5232 } else { 5233 sta->sta.mfp = false; 5234 } 5235 5236 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5237 elems->ext_capab_len); 5238 5239 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5240 local->hw.queues >= IEEE80211_NUM_ACS; 5241 5242 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5243 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5244 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5245 if (err) { 5246 sdata_info(sdata, 5247 "failed to move station %pM to desired state\n", 5248 sta->sta.addr); 5249 WARN_ON(__sta_info_destroy(sta)); 5250 goto out_err; 5251 } 5252 5253 if (sdata->wdev.use_4addr) 5254 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5255 5256 ieee80211_set_associated(sdata, assoc_data, changed); 5257 5258 /* 5259 * If we're using 4-addr mode, let the AP know that we're 5260 * doing so, so that it can create the STA VLAN on its side 5261 */ 5262 if (ifmgd->use_4addr) 5263 ieee80211_send_4addr_nullfunc(local, sdata); 5264 5265 /* 5266 * Start timer to probe the connection to the AP now. 5267 * Also start the timer that will detect beacon loss. 5268 */ 5269 ieee80211_sta_reset_beacon_monitor(sdata); 5270 ieee80211_sta_reset_conn_monitor(sdata); 5271 5272 return true; 5273 out_err: 5274 eth_zero_addr(sdata->vif.cfg.ap_addr); 5275 return false; 5276 } 5277 5278 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5279 struct ieee80211_mgmt *mgmt, 5280 size_t len) 5281 { 5282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5283 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5284 u16 capab_info, status_code, aid; 5285 struct ieee80211_elems_parse_params parse_params = { 5286 .bss = NULL, 5287 .link_id = -1, 5288 .from_ap = true, 5289 }; 5290 struct ieee802_11_elems *elems; 5291 int ac; 5292 const u8 *elem_start; 5293 unsigned int elem_len; 5294 bool reassoc; 5295 struct ieee80211_event event = { 5296 .type = MLME_EVENT, 5297 .u.mlme.data = ASSOC_EVENT, 5298 }; 5299 struct ieee80211_prep_tx_info info = {}; 5300 struct cfg80211_rx_assoc_resp_data resp = { 5301 .uapsd_queues = -1, 5302 }; 5303 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5304 unsigned int link_id; 5305 5306 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5307 5308 if (!assoc_data) 5309 return; 5310 5311 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5312 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5313 return; 5314 5315 /* 5316 * AssocResp and ReassocResp have identical structure, so process both 5317 * of them in this function. 5318 */ 5319 5320 if (len < 24 + 6) 5321 return; 5322 5323 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5324 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5325 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5326 if (assoc_data->s1g) 5327 elem_start = mgmt->u.s1g_assoc_resp.variable; 5328 else 5329 elem_start = mgmt->u.assoc_resp.variable; 5330 5331 /* 5332 * Note: this may not be perfect, AP might misbehave - if 5333 * anyone needs to rely on perfect complete notification 5334 * with the exact right subtype, then we need to track what 5335 * we actually transmitted. 5336 */ 5337 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5338 IEEE80211_STYPE_ASSOC_REQ; 5339 5340 if (assoc_data->fils_kek_len && 5341 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5342 return; 5343 5344 elem_len = len - (elem_start - (u8 *)mgmt); 5345 parse_params.start = elem_start; 5346 parse_params.len = elem_len; 5347 elems = ieee802_11_parse_elems_full(&parse_params); 5348 if (!elems) 5349 goto notify_driver; 5350 5351 if (elems->aid_resp) 5352 aid = le16_to_cpu(elems->aid_resp->aid); 5353 else if (assoc_data->s1g) 5354 aid = 0; /* TODO */ 5355 else 5356 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5357 5358 /* 5359 * The 5 MSB of the AID field are reserved 5360 * (802.11-2016 9.4.1.8 AID field) 5361 */ 5362 aid &= 0x7ff; 5363 5364 sdata_info(sdata, 5365 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5366 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5367 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5368 5369 ifmgd->broken_ap = false; 5370 5371 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5372 elems->timeout_int && 5373 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5374 u32 tu, ms; 5375 5376 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5377 le32_to_cpu(elems->timeout_int->value)); 5378 5379 tu = le32_to_cpu(elems->timeout_int->value); 5380 ms = tu * 1024 / 1000; 5381 sdata_info(sdata, 5382 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5383 assoc_data->ap_addr, tu, ms); 5384 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5385 assoc_data->timeout_started = true; 5386 assoc_data->comeback = true; 5387 if (ms > IEEE80211_ASSOC_TIMEOUT) 5388 run_again(sdata, assoc_data->timeout); 5389 goto notify_driver; 5390 } 5391 5392 if (status_code != WLAN_STATUS_SUCCESS) { 5393 sdata_info(sdata, "%pM denied association (code=%d)\n", 5394 assoc_data->ap_addr, status_code); 5395 event.u.mlme.status = MLME_DENIED; 5396 event.u.mlme.reason = status_code; 5397 drv_event_callback(sdata->local, sdata, &event); 5398 } else { 5399 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5400 sdata_info(sdata, 5401 "invalid AID value %d (out of range), turn off PS\n", 5402 aid); 5403 aid = 0; 5404 ifmgd->broken_ap = true; 5405 } 5406 5407 if (ieee80211_vif_is_mld(&sdata->vif)) { 5408 struct ieee80211_mle_basic_common_info *common; 5409 5410 if (!elems->ml_basic) { 5411 sdata_info(sdata, 5412 "MLO association with %pM but no (basic) multi-link element in response!\n", 5413 assoc_data->ap_addr); 5414 goto abandon_assoc; 5415 } 5416 5417 common = (void *)elems->ml_basic->variable; 5418 5419 if (memcmp(assoc_data->ap_addr, 5420 common->mld_mac_addr, ETH_ALEN)) { 5421 sdata_info(sdata, 5422 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5423 common->mld_mac_addr, 5424 assoc_data->ap_addr); 5425 goto abandon_assoc; 5426 } 5427 } 5428 5429 sdata->vif.cfg.aid = aid; 5430 5431 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5432 elem_start, elem_len)) { 5433 /* oops -- internal error -- send timeout for now */ 5434 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5435 goto notify_driver; 5436 } 5437 event.u.mlme.status = MLME_SUCCESS; 5438 drv_event_callback(sdata->local, sdata, &event); 5439 sdata_info(sdata, "associated\n"); 5440 5441 info.success = 1; 5442 } 5443 5444 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5445 struct ieee80211_link_data *link; 5446 5447 if (!assoc_data->link[link_id].bss) 5448 continue; 5449 5450 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5451 ether_addr_copy(resp.links[link_id].addr, 5452 assoc_data->link[link_id].addr); 5453 resp.links[link_id].status = assoc_data->link[link_id].status; 5454 5455 link = sdata_dereference(sdata->link[link_id], sdata); 5456 if (!link) 5457 continue; 5458 5459 /* get uapsd queues configuration - same for all links */ 5460 resp.uapsd_queues = 0; 5461 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5462 if (link->tx_conf[ac].uapsd) 5463 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5464 } 5465 5466 if (ieee80211_vif_is_mld(&sdata->vif)) { 5467 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5468 resp.ap_mld_addr = ap_mld_addr; 5469 } 5470 5471 ieee80211_destroy_assoc_data(sdata, 5472 status_code == WLAN_STATUS_SUCCESS ? 5473 ASSOC_SUCCESS : 5474 ASSOC_REJECTED); 5475 5476 resp.buf = (u8 *)mgmt; 5477 resp.len = len; 5478 resp.req_ies = ifmgd->assoc_req_ies; 5479 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5480 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5481 notify_driver: 5482 drv_mgd_complete_tx(sdata->local, sdata, &info); 5483 kfree(elems); 5484 return; 5485 abandon_assoc: 5486 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5487 goto notify_driver; 5488 } 5489 5490 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5491 struct ieee80211_mgmt *mgmt, size_t len, 5492 struct ieee80211_rx_status *rx_status) 5493 { 5494 struct ieee80211_sub_if_data *sdata = link->sdata; 5495 struct ieee80211_local *local = sdata->local; 5496 struct ieee80211_bss *bss; 5497 struct ieee80211_channel *channel; 5498 5499 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5500 5501 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5502 ieee80211_rx_status_to_khz(rx_status)); 5503 if (!channel) 5504 return; 5505 5506 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5507 if (bss) { 5508 link->conf->beacon_rate = bss->beacon_rate; 5509 ieee80211_rx_bss_put(local, bss); 5510 } 5511 } 5512 5513 5514 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5515 struct sk_buff *skb) 5516 { 5517 struct ieee80211_sub_if_data *sdata = link->sdata; 5518 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5519 struct ieee80211_if_managed *ifmgd; 5520 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5521 struct ieee80211_channel *channel; 5522 size_t baselen, len = skb->len; 5523 5524 ifmgd = &sdata->u.mgd; 5525 5526 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5527 5528 /* 5529 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5530 * "If a 6 GHz AP receives a Probe Request frame and responds with 5531 * a Probe Response frame [..], the Address 1 field of the Probe 5532 * Response frame shall be set to the broadcast address [..]" 5533 * So, on 6GHz band we should also accept broadcast responses. 5534 */ 5535 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5536 rx_status->freq); 5537 if (!channel) 5538 return; 5539 5540 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5541 (channel->band != NL80211_BAND_6GHZ || 5542 !is_broadcast_ether_addr(mgmt->da))) 5543 return; /* ignore ProbeResp to foreign address */ 5544 5545 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5546 if (baselen > len) 5547 return; 5548 5549 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5550 5551 if (ifmgd->associated && 5552 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5553 ieee80211_reset_ap_probe(sdata); 5554 } 5555 5556 /* 5557 * This is the canonical list of information elements we care about, 5558 * the filter code also gives us all changes to the Microsoft OUI 5559 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5560 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5561 * changes to requested client power. 5562 * 5563 * We implement beacon filtering in software since that means we can 5564 * avoid processing the frame here and in cfg80211, and userspace 5565 * will not be able to tell whether the hardware supports it or not. 5566 * 5567 * XXX: This list needs to be dynamic -- userspace needs to be able to 5568 * add items it requires. It also needs to be able to tell us to 5569 * look out for other vendor IEs. 5570 */ 5571 static const u64 care_about_ies = 5572 (1ULL << WLAN_EID_COUNTRY) | 5573 (1ULL << WLAN_EID_ERP_INFO) | 5574 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5575 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5576 (1ULL << WLAN_EID_HT_CAPABILITY) | 5577 (1ULL << WLAN_EID_HT_OPERATION) | 5578 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5579 5580 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5581 struct ieee80211_if_managed *ifmgd, 5582 struct ieee80211_bss_conf *bss_conf, 5583 struct ieee80211_local *local, 5584 struct ieee80211_rx_status *rx_status) 5585 { 5586 struct ieee80211_sub_if_data *sdata = link->sdata; 5587 5588 /* Track average RSSI from the Beacon frames of the current AP */ 5589 5590 if (!link->u.mgd.tracking_signal_avg) { 5591 link->u.mgd.tracking_signal_avg = true; 5592 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5593 link->u.mgd.last_cqm_event_signal = 0; 5594 link->u.mgd.count_beacon_signal = 1; 5595 link->u.mgd.last_ave_beacon_signal = 0; 5596 } else { 5597 link->u.mgd.count_beacon_signal++; 5598 } 5599 5600 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5601 -rx_status->signal); 5602 5603 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5604 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5605 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5606 int last_sig = link->u.mgd.last_ave_beacon_signal; 5607 struct ieee80211_event event = { 5608 .type = RSSI_EVENT, 5609 }; 5610 5611 /* 5612 * if signal crosses either of the boundaries, invoke callback 5613 * with appropriate parameters 5614 */ 5615 if (sig > ifmgd->rssi_max_thold && 5616 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5617 link->u.mgd.last_ave_beacon_signal = sig; 5618 event.u.rssi.data = RSSI_EVENT_HIGH; 5619 drv_event_callback(local, sdata, &event); 5620 } else if (sig < ifmgd->rssi_min_thold && 5621 (last_sig >= ifmgd->rssi_max_thold || 5622 last_sig == 0)) { 5623 link->u.mgd.last_ave_beacon_signal = sig; 5624 event.u.rssi.data = RSSI_EVENT_LOW; 5625 drv_event_callback(local, sdata, &event); 5626 } 5627 } 5628 5629 if (bss_conf->cqm_rssi_thold && 5630 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5631 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5632 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5633 int last_event = link->u.mgd.last_cqm_event_signal; 5634 int thold = bss_conf->cqm_rssi_thold; 5635 int hyst = bss_conf->cqm_rssi_hyst; 5636 5637 if (sig < thold && 5638 (last_event == 0 || sig < last_event - hyst)) { 5639 link->u.mgd.last_cqm_event_signal = sig; 5640 ieee80211_cqm_rssi_notify( 5641 &sdata->vif, 5642 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5643 sig, GFP_KERNEL); 5644 } else if (sig > thold && 5645 (last_event == 0 || sig > last_event + hyst)) { 5646 link->u.mgd.last_cqm_event_signal = sig; 5647 ieee80211_cqm_rssi_notify( 5648 &sdata->vif, 5649 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5650 sig, GFP_KERNEL); 5651 } 5652 } 5653 5654 if (bss_conf->cqm_rssi_low && 5655 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5656 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5657 int last_event = link->u.mgd.last_cqm_event_signal; 5658 int low = bss_conf->cqm_rssi_low; 5659 int high = bss_conf->cqm_rssi_high; 5660 5661 if (sig < low && 5662 (last_event == 0 || last_event >= low)) { 5663 link->u.mgd.last_cqm_event_signal = sig; 5664 ieee80211_cqm_rssi_notify( 5665 &sdata->vif, 5666 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5667 sig, GFP_KERNEL); 5668 } else if (sig > high && 5669 (last_event == 0 || last_event <= high)) { 5670 link->u.mgd.last_cqm_event_signal = sig; 5671 ieee80211_cqm_rssi_notify( 5672 &sdata->vif, 5673 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5674 sig, GFP_KERNEL); 5675 } 5676 } 5677 } 5678 5679 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5680 struct cfg80211_bss *bss) 5681 { 5682 if (ether_addr_equal(tx_bssid, bss->bssid)) 5683 return true; 5684 if (!bss->transmitted_bss) 5685 return false; 5686 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5687 } 5688 5689 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5690 const struct ieee80211_eht_operation *eht_oper, 5691 u64 *changed) 5692 { 5693 struct ieee80211_local *local = link->sdata->local; 5694 u16 bitmap = 0, extracted; 5695 5696 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5697 (eht_oper->params & 5698 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5699 const struct ieee80211_eht_operation_info *info = 5700 (void *)eht_oper->optional; 5701 const u8 *disable_subchannel_bitmap = info->optional; 5702 5703 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5704 } 5705 5706 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5707 &link->conf->chandef, 5708 bitmap); 5709 5710 /* accept if there are no changes */ 5711 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5712 extracted == link->conf->eht_puncturing) 5713 return true; 5714 5715 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5716 &link->conf->chandef)) { 5717 link_info(link, 5718 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5719 link->u.mgd.bssid, 5720 bitmap, 5721 link->conf->chandef.width); 5722 return false; 5723 } 5724 5725 if (bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING)) 5726 return false; 5727 5728 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5729 return true; 5730 } 5731 5732 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5733 struct wiphy_work *work) 5734 { 5735 struct ieee80211_sub_if_data *sdata = 5736 container_of(work, struct ieee80211_sub_if_data, 5737 u.mgd.ml_reconf_work.work); 5738 u16 new_valid_links, new_active_links, new_dormant_links; 5739 int ret; 5740 5741 if (!sdata->u.mgd.removed_links) 5742 return; 5743 5744 sdata_info(sdata, 5745 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5746 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5747 5748 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5749 if (new_valid_links == sdata->vif.valid_links) 5750 return; 5751 5752 if (!new_valid_links || 5753 !(new_valid_links & ~sdata->vif.dormant_links)) { 5754 sdata_info(sdata, "No valid links after reconfiguration\n"); 5755 ret = -EINVAL; 5756 goto out; 5757 } 5758 5759 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5760 if (new_active_links != sdata->vif.active_links) { 5761 if (!new_active_links) 5762 new_active_links = 5763 BIT(ffs(new_valid_links & 5764 ~sdata->vif.dormant_links) - 1); 5765 5766 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 5767 if (ret) { 5768 sdata_info(sdata, 5769 "Failed setting active links\n"); 5770 goto out; 5771 } 5772 } 5773 5774 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 5775 5776 ret = ieee80211_vif_set_links(sdata, new_valid_links, 5777 new_dormant_links); 5778 if (ret) 5779 sdata_info(sdata, "Failed setting valid links\n"); 5780 5781 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 5782 5783 out: 5784 if (!ret) 5785 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5786 else 5787 __ieee80211_disconnect(sdata); 5788 5789 sdata->u.mgd.removed_links = 0; 5790 } 5791 5792 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5793 struct ieee802_11_elems *elems) 5794 { 5795 const struct ieee80211_multi_link_elem *ml; 5796 const struct element *sub; 5797 ssize_t ml_len; 5798 unsigned long removed_links = 0; 5799 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5800 u8 link_id; 5801 u32 delay; 5802 5803 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5804 return; 5805 5806 ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, 5807 elems->ie_start, 5808 elems->total_len, 5809 elems->scratch_pos, 5810 elems->scratch + elems->scratch_len - 5811 elems->scratch_pos, 5812 WLAN_EID_FRAGMENT); 5813 if (ml_len < 0) 5814 return; 5815 5816 elems->ml_reconf = (const void *)elems->scratch_pos; 5817 elems->ml_reconf_len = ml_len; 5818 ml = elems->ml_reconf; 5819 5820 /* Directly parse the sub elements as the common information doesn't 5821 * hold any useful information. 5822 */ 5823 for_each_mle_subelement(sub, (u8 *)ml, ml_len) { 5824 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 5825 u8 *pos = prof->variable; 5826 u16 control; 5827 5828 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 5829 continue; 5830 5831 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 5832 sub->datalen)) 5833 return; 5834 5835 control = le16_to_cpu(prof->control); 5836 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 5837 5838 removed_links |= BIT(link_id); 5839 5840 /* the MAC address should not be included, but handle it */ 5841 if (control & 5842 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 5843 pos += 6; 5844 5845 /* According to Draft P802.11be_D3.0, the control should 5846 * include the AP Removal Timer present. If the AP Removal Timer 5847 * is not present assume immediate removal. 5848 */ 5849 if (control & 5850 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 5851 link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos); 5852 } 5853 5854 removed_links &= sdata->vif.valid_links; 5855 if (!removed_links) { 5856 /* In case the removal was cancelled, abort it */ 5857 if (sdata->u.mgd.removed_links) { 5858 sdata->u.mgd.removed_links = 0; 5859 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5860 &sdata->u.mgd.ml_reconf_work); 5861 } 5862 return; 5863 } 5864 5865 delay = 0; 5866 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 5867 struct ieee80211_bss_conf *link_conf = 5868 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 5869 u32 link_delay; 5870 5871 if (!link_conf) { 5872 removed_links &= ~BIT(link_id); 5873 continue; 5874 } 5875 5876 link_delay = link_conf->beacon_int * 5877 link_removal_timeout[link_id]; 5878 5879 if (!delay) 5880 delay = link_delay; 5881 else 5882 delay = min(delay, link_delay); 5883 } 5884 5885 sdata->u.mgd.removed_links = removed_links; 5886 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 5887 &sdata->u.mgd.ml_reconf_work, 5888 TU_TO_JIFFIES(delay)); 5889 } 5890 5891 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 5892 struct wiphy_work *work) 5893 { 5894 u16 new_active_links, new_dormant_links; 5895 struct ieee80211_sub_if_data *sdata = 5896 container_of(work, struct ieee80211_sub_if_data, 5897 u.mgd.ttlm_work.work); 5898 int ret; 5899 5900 new_active_links = sdata->u.mgd.ttlm_info.map & 5901 sdata->vif.valid_links; 5902 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 5903 sdata->vif.valid_links; 5904 if (!new_active_links) { 5905 ieee80211_disconnect(&sdata->vif, false); 5906 return; 5907 } 5908 5909 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 5910 new_active_links = BIT(ffs(new_active_links) - 1); 5911 ieee80211_set_active_links(&sdata->vif, new_active_links); 5912 5913 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 5914 new_dormant_links); 5915 5916 sdata->u.mgd.ttlm_info.active = true; 5917 sdata->u.mgd.ttlm_info.switch_time = 0; 5918 5919 if (!ret) 5920 ieee80211_vif_cfg_change_notify(sdata, 5921 BSS_CHANGED_MLD_VALID_LINKS); 5922 } 5923 5924 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 5925 { 5926 if (bm_size == 1) 5927 return *data; 5928 else 5929 return get_unaligned_le16(data); 5930 } 5931 5932 static int 5933 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 5934 const struct ieee80211_ttlm_elem *ttlm, 5935 struct ieee80211_adv_ttlm_info *ttlm_info) 5936 { 5937 /* The element size was already validated in 5938 * ieee80211_tid_to_link_map_size_ok() 5939 */ 5940 u8 control, link_map_presence, map_size, tid; 5941 u8 *pos; 5942 5943 memset(ttlm_info, 0, sizeof(*ttlm_info)); 5944 pos = (void *)ttlm->optional; 5945 control = ttlm->control; 5946 5947 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 5948 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 5949 return 0; 5950 5951 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 5952 IEEE80211_TTLM_DIRECTION_BOTH) { 5953 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 5954 return -EINVAL; 5955 } 5956 5957 link_map_presence = *pos; 5958 pos++; 5959 5960 ttlm_info->switch_time = get_unaligned_le16(pos); 5961 5962 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 5963 * by 1. 5964 */ 5965 if (!ttlm_info->switch_time) 5966 ttlm_info->switch_time = 1; 5967 5968 pos += 2; 5969 5970 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 5971 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 5972 pos += 3; 5973 } 5974 5975 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 5976 map_size = 1; 5977 else 5978 map_size = 2; 5979 5980 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 5981 * not advertise a TID-to-link mapping that does not map all TIDs to the 5982 * same link set, reject frame if not all links have mapping 5983 */ 5984 if (link_map_presence != 0xff) { 5985 sdata_info(sdata, 5986 "Invalid advertised T2L mapping presence indicator\n"); 5987 return -EINVAL; 5988 } 5989 5990 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 5991 if (!ttlm_info->map) { 5992 sdata_info(sdata, 5993 "Invalid advertised T2L map for TID 0\n"); 5994 return -EINVAL; 5995 } 5996 5997 pos += map_size; 5998 5999 for (tid = 1; tid < 8; tid++) { 6000 u16 map = ieee80211_get_ttlm(map_size, pos); 6001 6002 if (map != ttlm_info->map) { 6003 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6004 tid); 6005 return -EINVAL; 6006 } 6007 6008 pos += map_size; 6009 } 6010 return 0; 6011 } 6012 6013 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6014 struct ieee802_11_elems *elems, 6015 u64 beacon_ts) 6016 { 6017 u8 i; 6018 int ret; 6019 6020 if (!ieee80211_vif_is_mld(&sdata->vif)) 6021 return; 6022 6023 if (!elems->ttlm_num) { 6024 if (sdata->u.mgd.ttlm_info.switch_time) { 6025 /* if a planned TID-to-link mapping was cancelled - 6026 * abort it 6027 */ 6028 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6029 &sdata->u.mgd.ttlm_work); 6030 } else if (sdata->u.mgd.ttlm_info.active) { 6031 /* if no TID-to-link element, set to default mapping in 6032 * which all TIDs are mapped to all setup links 6033 */ 6034 ret = ieee80211_vif_set_links(sdata, 6035 sdata->vif.valid_links, 6036 0); 6037 if (ret) { 6038 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6039 return; 6040 } 6041 ieee80211_vif_cfg_change_notify(sdata, 6042 BSS_CHANGED_MLD_VALID_LINKS); 6043 } 6044 memset(&sdata->u.mgd.ttlm_info, 0, 6045 sizeof(sdata->u.mgd.ttlm_info)); 6046 return; 6047 } 6048 6049 for (i = 0; i < elems->ttlm_num; i++) { 6050 struct ieee80211_adv_ttlm_info ttlm_info; 6051 u32 res; 6052 6053 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6054 &ttlm_info); 6055 6056 if (res) { 6057 __ieee80211_disconnect(sdata); 6058 return; 6059 } 6060 6061 if (ttlm_info.switch_time) { 6062 u16 beacon_ts_tu, st_tu, delay; 6063 u32 delay_jiffies; 6064 u64 mask; 6065 6066 /* The t2l map switch time is indicated with a partial 6067 * TSF value (bits 10 to 25), get the partial beacon TS 6068 * as well, and calc the delay to the start time. 6069 */ 6070 mask = GENMASK_ULL(25, 10); 6071 beacon_ts_tu = (beacon_ts & mask) >> 10; 6072 st_tu = ttlm_info.switch_time; 6073 delay = st_tu - beacon_ts_tu; 6074 6075 /* 6076 * If the switch time is far in the future, then it 6077 * could also be the previous switch still being 6078 * announced. 6079 * We can simply ignore it for now, if it is a future 6080 * switch the AP will continue to announce it anyway. 6081 */ 6082 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6083 return; 6084 6085 delay_jiffies = TU_TO_JIFFIES(delay); 6086 6087 /* Link switching can take time, so schedule it 6088 * 100ms before to be ready on time 6089 */ 6090 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6091 delay_jiffies -= 6092 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6093 else 6094 delay_jiffies = 0; 6095 6096 sdata->u.mgd.ttlm_info = ttlm_info; 6097 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6098 &sdata->u.mgd.ttlm_work); 6099 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6100 &sdata->u.mgd.ttlm_work, 6101 delay_jiffies); 6102 return; 6103 } 6104 } 6105 } 6106 6107 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6108 struct ieee80211_hdr *hdr, size_t len, 6109 struct ieee80211_rx_status *rx_status) 6110 { 6111 struct ieee80211_sub_if_data *sdata = link->sdata; 6112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6113 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6114 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6115 struct ieee80211_mgmt *mgmt = (void *) hdr; 6116 size_t baselen; 6117 struct ieee802_11_elems *elems; 6118 struct ieee80211_local *local = sdata->local; 6119 struct ieee80211_chanctx_conf *chanctx_conf; 6120 struct ieee80211_supported_band *sband; 6121 struct ieee80211_channel *chan; 6122 struct link_sta_info *link_sta; 6123 struct sta_info *sta; 6124 u64 changed = 0; 6125 bool erp_valid; 6126 u8 erp_value = 0; 6127 u32 ncrc = 0; 6128 u8 *bssid, *variable = mgmt->u.beacon.variable; 6129 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6130 struct ieee80211_elems_parse_params parse_params = { 6131 .link_id = -1, 6132 .from_ap = true, 6133 }; 6134 6135 lockdep_assert_wiphy(local->hw.wiphy); 6136 6137 /* Process beacon from the current BSS */ 6138 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6139 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6140 struct ieee80211_ext *ext = (void *) mgmt; 6141 6142 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6143 variable = ext->u.s1g_short_beacon.variable; 6144 else 6145 variable = ext->u.s1g_beacon.variable; 6146 } 6147 6148 baselen = (u8 *) variable - (u8 *) mgmt; 6149 if (baselen > len) 6150 return; 6151 6152 parse_params.start = variable; 6153 parse_params.len = len - baselen; 6154 6155 rcu_read_lock(); 6156 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6157 if (!chanctx_conf) { 6158 rcu_read_unlock(); 6159 return; 6160 } 6161 6162 if (ieee80211_rx_status_to_khz(rx_status) != 6163 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6164 rcu_read_unlock(); 6165 return; 6166 } 6167 chan = chanctx_conf->def.chan; 6168 rcu_read_unlock(); 6169 6170 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6171 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6172 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6173 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6174 elems = ieee802_11_parse_elems_full(&parse_params); 6175 if (!elems) 6176 return; 6177 6178 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6179 6180 if (elems->dtim_period) 6181 link->u.mgd.dtim_period = elems->dtim_period; 6182 link->u.mgd.have_beacon = true; 6183 ifmgd->assoc_data->need_beacon = false; 6184 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6185 link->conf->sync_tsf = 6186 le64_to_cpu(mgmt->u.beacon.timestamp); 6187 link->conf->sync_device_ts = 6188 rx_status->device_timestamp; 6189 link->conf->sync_dtim_count = elems->dtim_count; 6190 } 6191 6192 if (elems->mbssid_config_ie) 6193 bss_conf->profile_periodicity = 6194 elems->mbssid_config_ie->profile_periodicity; 6195 else 6196 bss_conf->profile_periodicity = 0; 6197 6198 if (elems->ext_capab_len >= 11 && 6199 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6200 bss_conf->ema_ap = true; 6201 else 6202 bss_conf->ema_ap = false; 6203 6204 /* continue assoc process */ 6205 ifmgd->assoc_data->timeout = jiffies; 6206 ifmgd->assoc_data->timeout_started = true; 6207 run_again(sdata, ifmgd->assoc_data->timeout); 6208 kfree(elems); 6209 return; 6210 } 6211 6212 if (!ifmgd->associated || 6213 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 6214 return; 6215 bssid = link->u.mgd.bssid; 6216 6217 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6218 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6219 local, rx_status); 6220 6221 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6222 mlme_dbg_ratelimited(sdata, 6223 "cancelling AP probe due to a received beacon\n"); 6224 ieee80211_reset_ap_probe(sdata); 6225 } 6226 6227 /* 6228 * Push the beacon loss detection into the future since 6229 * we are processing a beacon from the AP just now. 6230 */ 6231 ieee80211_sta_reset_beacon_monitor(sdata); 6232 6233 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6234 * element (which carries the beacon interval). Don't forget to add a 6235 * bit to care_about_ies[] above if mac80211 is interested in a 6236 * changing S1G element. 6237 */ 6238 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6239 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6240 parse_params.bss = link->u.mgd.bss; 6241 parse_params.filter = care_about_ies; 6242 parse_params.crc = ncrc; 6243 elems = ieee802_11_parse_elems_full(&parse_params); 6244 if (!elems) 6245 return; 6246 ncrc = elems->crc; 6247 6248 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6249 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6250 if (local->hw.conf.dynamic_ps_timeout > 0) { 6251 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6252 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6253 ieee80211_hw_config(local, 6254 IEEE80211_CONF_CHANGE_PS); 6255 } 6256 ieee80211_send_nullfunc(local, sdata, false); 6257 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6258 local->pspolling = true; 6259 6260 /* 6261 * Here is assumed that the driver will be 6262 * able to send ps-poll frame and receive a 6263 * response even though power save mode is 6264 * enabled, but some drivers might require 6265 * to disable power save here. This needs 6266 * to be investigated. 6267 */ 6268 ieee80211_send_pspoll(local, sdata); 6269 } 6270 } 6271 6272 if (sdata->vif.p2p || 6273 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6274 struct ieee80211_p2p_noa_attr noa = {}; 6275 int ret; 6276 6277 ret = cfg80211_get_p2p_attr(variable, 6278 len - baselen, 6279 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6280 (u8 *) &noa, sizeof(noa)); 6281 if (ret >= 2) { 6282 if (link->u.mgd.p2p_noa_index != noa.index) { 6283 /* valid noa_attr and index changed */ 6284 link->u.mgd.p2p_noa_index = noa.index; 6285 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6286 changed |= BSS_CHANGED_P2P_PS; 6287 /* 6288 * make sure we update all information, the CRC 6289 * mechanism doesn't look at P2P attributes. 6290 */ 6291 link->u.mgd.beacon_crc_valid = false; 6292 } 6293 } else if (link->u.mgd.p2p_noa_index != -1) { 6294 /* noa_attr not found and we had valid noa_attr before */ 6295 link->u.mgd.p2p_noa_index = -1; 6296 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6297 changed |= BSS_CHANGED_P2P_PS; 6298 link->u.mgd.beacon_crc_valid = false; 6299 } 6300 } 6301 6302 if (link->u.mgd.csa_waiting_bcn) 6303 ieee80211_chswitch_post_beacon(link); 6304 6305 /* 6306 * Update beacon timing and dtim count on every beacon appearance. This 6307 * will allow the driver to use the most updated values. Do it before 6308 * comparing this one with last received beacon. 6309 * IMPORTANT: These parameters would possibly be out of sync by the time 6310 * the driver will use them. The synchronized view is currently 6311 * guaranteed only in certain callbacks. 6312 */ 6313 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6314 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6315 link->conf->sync_tsf = 6316 le64_to_cpu(mgmt->u.beacon.timestamp); 6317 link->conf->sync_device_ts = 6318 rx_status->device_timestamp; 6319 link->conf->sync_dtim_count = elems->dtim_count; 6320 } 6321 6322 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6323 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6324 goto free; 6325 link->u.mgd.beacon_crc = ncrc; 6326 link->u.mgd.beacon_crc_valid = true; 6327 6328 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6329 6330 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6331 rx_status->device_timestamp, 6332 elems, true); 6333 6334 if (!link->u.mgd.disable_wmm_tracking && 6335 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6336 elems->wmm_param_len, 6337 elems->mu_edca_param_set)) 6338 changed |= BSS_CHANGED_QOS; 6339 6340 /* 6341 * If we haven't had a beacon before, tell the driver about the 6342 * DTIM period (and beacon timing if desired) now. 6343 */ 6344 if (!link->u.mgd.have_beacon) { 6345 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6346 bss_conf->dtim_period = elems->dtim_period ?: 1; 6347 6348 changed |= BSS_CHANGED_BEACON_INFO; 6349 link->u.mgd.have_beacon = true; 6350 6351 ieee80211_recalc_ps(local); 6352 6353 ieee80211_recalc_ps_vif(sdata); 6354 } 6355 6356 if (elems->erp_info) { 6357 erp_valid = true; 6358 erp_value = elems->erp_info[0]; 6359 } else { 6360 erp_valid = false; 6361 } 6362 6363 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6364 changed |= ieee80211_handle_bss_capability(link, 6365 le16_to_cpu(mgmt->u.beacon.capab_info), 6366 erp_valid, erp_value); 6367 6368 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6369 if (WARN_ON(!sta)) { 6370 goto free; 6371 } 6372 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6373 lockdep_is_held(&local->hw.wiphy->mtx)); 6374 if (WARN_ON(!link_sta)) { 6375 goto free; 6376 } 6377 6378 if (WARN_ON(!link->conf->chandef.chan)) 6379 goto free; 6380 6381 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 6382 6383 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6384 6385 if (ieee80211_config_bw(link, elems->ht_cap_elem, 6386 elems->vht_cap_elem, elems->ht_operation, 6387 elems->vht_operation, elems->he_operation, 6388 elems->eht_operation, 6389 elems->s1g_oper, bssid, &changed)) { 6390 sdata_info(sdata, 6391 "failed to follow AP %pM bandwidth change, disconnect\n", 6392 bssid); 6393 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6394 WLAN_REASON_DEAUTH_LEAVING, 6395 true, deauth_buf); 6396 ieee80211_report_disconnect(sdata, deauth_buf, 6397 sizeof(deauth_buf), true, 6398 WLAN_REASON_DEAUTH_LEAVING, 6399 false); 6400 goto free; 6401 } 6402 6403 if (elems->opmode_notif) 6404 ieee80211_vht_handle_opmode(sdata, link_sta, 6405 *elems->opmode_notif, 6406 rx_status->band); 6407 6408 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6409 elems->country_elem, 6410 elems->country_elem_len, 6411 elems->pwr_constr_elem, 6412 elems->cisco_dtpc_elem); 6413 6414 if (elems->eht_operation && 6415 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 6416 if (!ieee80211_config_puncturing(link, elems->eht_operation, 6417 &changed)) { 6418 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6419 WLAN_REASON_DEAUTH_LEAVING, 6420 true, deauth_buf); 6421 ieee80211_report_disconnect(sdata, deauth_buf, 6422 sizeof(deauth_buf), true, 6423 WLAN_REASON_DEAUTH_LEAVING, 6424 false); 6425 goto free; 6426 } 6427 } 6428 6429 ieee80211_ml_reconfiguration(sdata, elems); 6430 ieee80211_process_adv_ttlm(sdata, elems, 6431 le64_to_cpu(mgmt->u.beacon.timestamp)); 6432 6433 ieee80211_link_info_change_notify(sdata, link, changed); 6434 free: 6435 kfree(elems); 6436 } 6437 6438 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 6439 struct sk_buff *skb) 6440 { 6441 struct ieee80211_link_data *link = &sdata->deflink; 6442 struct ieee80211_rx_status *rx_status; 6443 struct ieee80211_hdr *hdr; 6444 u16 fc; 6445 6446 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6447 6448 rx_status = (struct ieee80211_rx_status *) skb->cb; 6449 hdr = (struct ieee80211_hdr *) skb->data; 6450 fc = le16_to_cpu(hdr->frame_control); 6451 6452 switch (fc & IEEE80211_FCTL_STYPE) { 6453 case IEEE80211_STYPE_S1G_BEACON: 6454 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 6455 break; 6456 } 6457 } 6458 6459 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 6460 struct sk_buff *skb) 6461 { 6462 struct ieee80211_link_data *link = &sdata->deflink; 6463 struct ieee80211_rx_status *rx_status; 6464 struct ieee80211_mgmt *mgmt; 6465 u16 fc; 6466 int ies_len; 6467 6468 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6469 6470 rx_status = (struct ieee80211_rx_status *) skb->cb; 6471 mgmt = (struct ieee80211_mgmt *) skb->data; 6472 fc = le16_to_cpu(mgmt->frame_control); 6473 6474 if (rx_status->link_valid) { 6475 link = sdata_dereference(sdata->link[rx_status->link_id], 6476 sdata); 6477 if (!link) 6478 return; 6479 } 6480 6481 switch (fc & IEEE80211_FCTL_STYPE) { 6482 case IEEE80211_STYPE_BEACON: 6483 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 6484 skb->len, rx_status); 6485 break; 6486 case IEEE80211_STYPE_PROBE_RESP: 6487 ieee80211_rx_mgmt_probe_resp(link, skb); 6488 break; 6489 case IEEE80211_STYPE_AUTH: 6490 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 6491 break; 6492 case IEEE80211_STYPE_DEAUTH: 6493 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6494 break; 6495 case IEEE80211_STYPE_DISASSOC: 6496 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6497 break; 6498 case IEEE80211_STYPE_ASSOC_RESP: 6499 case IEEE80211_STYPE_REASSOC_RESP: 6500 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6501 break; 6502 case IEEE80211_STYPE_ACTION: 6503 if (!sdata->u.mgd.associated || 6504 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 6505 break; 6506 6507 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6508 struct ieee802_11_elems *elems; 6509 6510 ies_len = skb->len - 6511 offsetof(struct ieee80211_mgmt, 6512 u.action.u.chan_switch.variable); 6513 6514 if (ies_len < 0) 6515 break; 6516 6517 /* CSA IE cannot be overridden, no need for BSSID */ 6518 elems = ieee802_11_parse_elems( 6519 mgmt->u.action.u.chan_switch.variable, 6520 ies_len, true, NULL); 6521 6522 if (elems && !elems->parse_error) 6523 ieee80211_sta_process_chanswitch(link, 6524 rx_status->mactime, 6525 rx_status->device_timestamp, 6526 elems, false); 6527 kfree(elems); 6528 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6529 struct ieee802_11_elems *elems; 6530 6531 ies_len = skb->len - 6532 offsetof(struct ieee80211_mgmt, 6533 u.action.u.ext_chan_switch.variable); 6534 6535 if (ies_len < 0) 6536 break; 6537 6538 /* 6539 * extended CSA IE can't be overridden, no need for 6540 * BSSID 6541 */ 6542 elems = ieee802_11_parse_elems( 6543 mgmt->u.action.u.ext_chan_switch.variable, 6544 ies_len, true, NULL); 6545 6546 if (elems && !elems->parse_error) { 6547 /* for the handling code pretend it was an IE */ 6548 elems->ext_chansw_ie = 6549 &mgmt->u.action.u.ext_chan_switch.data; 6550 6551 ieee80211_sta_process_chanswitch(link, 6552 rx_status->mactime, 6553 rx_status->device_timestamp, 6554 elems, false); 6555 } 6556 6557 kfree(elems); 6558 } 6559 break; 6560 } 6561 } 6562 6563 static void ieee80211_sta_timer(struct timer_list *t) 6564 { 6565 struct ieee80211_sub_if_data *sdata = 6566 from_timer(sdata, t, u.mgd.timer); 6567 6568 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6569 } 6570 6571 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6572 u8 reason, bool tx) 6573 { 6574 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6575 6576 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6577 tx, frame_buf); 6578 6579 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6580 reason, false); 6581 } 6582 6583 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6584 { 6585 struct ieee80211_local *local = sdata->local; 6586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6587 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6588 u32 tx_flags = 0; 6589 u16 trans = 1; 6590 u16 status = 0; 6591 struct ieee80211_prep_tx_info info = { 6592 .subtype = IEEE80211_STYPE_AUTH, 6593 }; 6594 6595 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6596 6597 if (WARN_ON_ONCE(!auth_data)) 6598 return -EINVAL; 6599 6600 auth_data->tries++; 6601 6602 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6603 sdata_info(sdata, "authentication with %pM timed out\n", 6604 auth_data->ap_addr); 6605 6606 /* 6607 * Most likely AP is not in the range so remove the 6608 * bss struct for that AP. 6609 */ 6610 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6611 6612 return -ETIMEDOUT; 6613 } 6614 6615 if (auth_data->algorithm == WLAN_AUTH_SAE) 6616 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6617 6618 info.link_id = auth_data->link_id; 6619 drv_mgd_prepare_tx(local, sdata, &info); 6620 6621 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6622 auth_data->ap_addr, auth_data->tries, 6623 IEEE80211_AUTH_MAX_TRIES); 6624 6625 auth_data->expected_transaction = 2; 6626 6627 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6628 trans = auth_data->sae_trans; 6629 status = auth_data->sae_status; 6630 auth_data->expected_transaction = trans; 6631 } 6632 6633 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6634 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6635 IEEE80211_TX_INTFL_MLME_CONN_TX; 6636 6637 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6638 auth_data->data, auth_data->data_len, 6639 auth_data->ap_addr, auth_data->ap_addr, 6640 NULL, 0, 0, tx_flags); 6641 6642 if (tx_flags == 0) { 6643 if (auth_data->algorithm == WLAN_AUTH_SAE) 6644 auth_data->timeout = jiffies + 6645 IEEE80211_AUTH_TIMEOUT_SAE; 6646 else 6647 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6648 } else { 6649 auth_data->timeout = 6650 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6651 } 6652 6653 auth_data->timeout_started = true; 6654 run_again(sdata, auth_data->timeout); 6655 6656 return 0; 6657 } 6658 6659 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6660 { 6661 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6662 struct ieee80211_local *local = sdata->local; 6663 int ret; 6664 6665 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6666 6667 assoc_data->tries++; 6668 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6669 sdata_info(sdata, "association with %pM timed out\n", 6670 assoc_data->ap_addr); 6671 6672 /* 6673 * Most likely AP is not in the range so remove the 6674 * bss struct for that AP. 6675 */ 6676 cfg80211_unlink_bss(local->hw.wiphy, 6677 assoc_data->link[assoc_data->assoc_link_id].bss); 6678 6679 return -ETIMEDOUT; 6680 } 6681 6682 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6683 assoc_data->ap_addr, assoc_data->tries, 6684 IEEE80211_ASSOC_MAX_TRIES); 6685 ret = ieee80211_send_assoc(sdata); 6686 if (ret) 6687 return ret; 6688 6689 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6690 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6691 assoc_data->timeout_started = true; 6692 run_again(sdata, assoc_data->timeout); 6693 } else { 6694 assoc_data->timeout = 6695 round_jiffies_up(jiffies + 6696 IEEE80211_ASSOC_TIMEOUT_LONG); 6697 assoc_data->timeout_started = true; 6698 run_again(sdata, assoc_data->timeout); 6699 } 6700 6701 return 0; 6702 } 6703 6704 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6705 __le16 fc, bool acked) 6706 { 6707 struct ieee80211_local *local = sdata->local; 6708 6709 sdata->u.mgd.status_fc = fc; 6710 sdata->u.mgd.status_acked = acked; 6711 sdata->u.mgd.status_received = true; 6712 6713 wiphy_work_queue(local->hw.wiphy, &sdata->work); 6714 } 6715 6716 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6717 { 6718 struct ieee80211_local *local = sdata->local; 6719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6720 6721 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6722 6723 if (ifmgd->status_received) { 6724 __le16 fc = ifmgd->status_fc; 6725 bool status_acked = ifmgd->status_acked; 6726 6727 ifmgd->status_received = false; 6728 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6729 if (status_acked) { 6730 if (ifmgd->auth_data->algorithm == 6731 WLAN_AUTH_SAE) 6732 ifmgd->auth_data->timeout = 6733 jiffies + 6734 IEEE80211_AUTH_TIMEOUT_SAE; 6735 else 6736 ifmgd->auth_data->timeout = 6737 jiffies + 6738 IEEE80211_AUTH_TIMEOUT_SHORT; 6739 run_again(sdata, ifmgd->auth_data->timeout); 6740 } else { 6741 ifmgd->auth_data->timeout = jiffies - 1; 6742 } 6743 ifmgd->auth_data->timeout_started = true; 6744 } else if (ifmgd->assoc_data && 6745 !ifmgd->assoc_data->comeback && 6746 (ieee80211_is_assoc_req(fc) || 6747 ieee80211_is_reassoc_req(fc))) { 6748 /* 6749 * Update association timeout based on the TX status 6750 * for the (Re)Association Request frame. Skip this if 6751 * we have already processed a (Re)Association Response 6752 * frame that indicated need for association comeback 6753 * at a specific time in the future. This could happen 6754 * if the TX status information is delayed enough for 6755 * the response to be received and processed first. 6756 */ 6757 if (status_acked) { 6758 ifmgd->assoc_data->timeout = 6759 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6760 run_again(sdata, ifmgd->assoc_data->timeout); 6761 } else { 6762 ifmgd->assoc_data->timeout = jiffies - 1; 6763 } 6764 ifmgd->assoc_data->timeout_started = true; 6765 } 6766 } 6767 6768 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6769 time_after(jiffies, ifmgd->auth_data->timeout)) { 6770 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6771 /* 6772 * ok ... we waited for assoc or continuation but 6773 * userspace didn't do it, so kill the auth data 6774 */ 6775 ieee80211_destroy_auth_data(sdata, false); 6776 } else if (ieee80211_auth(sdata)) { 6777 u8 ap_addr[ETH_ALEN]; 6778 struct ieee80211_event event = { 6779 .type = MLME_EVENT, 6780 .u.mlme.data = AUTH_EVENT, 6781 .u.mlme.status = MLME_TIMEOUT, 6782 }; 6783 6784 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6785 6786 ieee80211_destroy_auth_data(sdata, false); 6787 6788 cfg80211_auth_timeout(sdata->dev, ap_addr); 6789 drv_event_callback(sdata->local, sdata, &event); 6790 } 6791 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6792 run_again(sdata, ifmgd->auth_data->timeout); 6793 6794 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6795 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6796 if ((ifmgd->assoc_data->need_beacon && 6797 !sdata->deflink.u.mgd.have_beacon) || 6798 ieee80211_do_assoc(sdata)) { 6799 struct ieee80211_event event = { 6800 .type = MLME_EVENT, 6801 .u.mlme.data = ASSOC_EVENT, 6802 .u.mlme.status = MLME_TIMEOUT, 6803 }; 6804 6805 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6806 drv_event_callback(sdata->local, sdata, &event); 6807 } 6808 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6809 run_again(sdata, ifmgd->assoc_data->timeout); 6810 6811 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6812 ifmgd->associated) { 6813 u8 *bssid = sdata->deflink.u.mgd.bssid; 6814 int max_tries; 6815 6816 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6817 max_tries = max_nullfunc_tries; 6818 else 6819 max_tries = max_probe_tries; 6820 6821 /* ACK received for nullfunc probing frame */ 6822 if (!ifmgd->probe_send_count) 6823 ieee80211_reset_ap_probe(sdata); 6824 else if (ifmgd->nullfunc_failed) { 6825 if (ifmgd->probe_send_count < max_tries) { 6826 mlme_dbg(sdata, 6827 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6828 bssid, ifmgd->probe_send_count, 6829 max_tries); 6830 ieee80211_mgd_probe_ap_send(sdata); 6831 } else { 6832 mlme_dbg(sdata, 6833 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6834 bssid); 6835 ieee80211_sta_connection_lost(sdata, 6836 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6837 false); 6838 } 6839 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6840 run_again(sdata, ifmgd->probe_timeout); 6841 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6842 mlme_dbg(sdata, 6843 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6844 bssid, probe_wait_ms); 6845 ieee80211_sta_connection_lost(sdata, 6846 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6847 } else if (ifmgd->probe_send_count < max_tries) { 6848 mlme_dbg(sdata, 6849 "No probe response from AP %pM after %dms, try %d/%i\n", 6850 bssid, probe_wait_ms, 6851 ifmgd->probe_send_count, max_tries); 6852 ieee80211_mgd_probe_ap_send(sdata); 6853 } else { 6854 /* 6855 * We actually lost the connection ... or did we? 6856 * Let's make sure! 6857 */ 6858 mlme_dbg(sdata, 6859 "No probe response from AP %pM after %dms, disconnecting.\n", 6860 bssid, probe_wait_ms); 6861 6862 ieee80211_sta_connection_lost(sdata, 6863 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6864 } 6865 } 6866 } 6867 6868 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6869 { 6870 struct ieee80211_sub_if_data *sdata = 6871 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6872 6873 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6874 return; 6875 6876 if (sdata->vif.bss_conf.csa_active && 6877 !sdata->deflink.u.mgd.csa_waiting_bcn) 6878 return; 6879 6880 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6881 return; 6882 6883 sdata->u.mgd.connection_loss = false; 6884 wiphy_work_queue(sdata->local->hw.wiphy, 6885 &sdata->u.mgd.beacon_connection_loss_work); 6886 } 6887 6888 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6889 { 6890 struct ieee80211_sub_if_data *sdata = 6891 from_timer(sdata, t, u.mgd.conn_mon_timer); 6892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6893 struct ieee80211_local *local = sdata->local; 6894 struct sta_info *sta; 6895 unsigned long timeout; 6896 6897 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6898 return; 6899 6900 if (sdata->vif.bss_conf.csa_active && 6901 !sdata->deflink.u.mgd.csa_waiting_bcn) 6902 return; 6903 6904 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6905 if (!sta) 6906 return; 6907 6908 timeout = sta->deflink.status_stats.last_ack; 6909 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6910 timeout = sta->deflink.rx_stats.last_rx; 6911 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6912 6913 /* If timeout is after now, then update timer to fire at 6914 * the later date, but do not actually probe at this time. 6915 */ 6916 if (time_is_after_jiffies(timeout)) { 6917 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6918 return; 6919 } 6920 6921 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 6922 } 6923 6924 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 6925 struct wiphy_work *work) 6926 { 6927 struct ieee80211_sub_if_data *sdata = 6928 container_of(work, struct ieee80211_sub_if_data, 6929 u.mgd.monitor_work); 6930 6931 ieee80211_mgd_probe_ap(sdata, false); 6932 } 6933 6934 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6935 { 6936 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6937 __ieee80211_stop_poll(sdata); 6938 6939 /* let's probe the connection once */ 6940 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6941 wiphy_work_queue(sdata->local->hw.wiphy, 6942 &sdata->u.mgd.monitor_work); 6943 } 6944 } 6945 6946 #ifdef CONFIG_PM 6947 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6948 { 6949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6950 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6951 6952 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6953 6954 if (ifmgd->auth_data || ifmgd->assoc_data) { 6955 const u8 *ap_addr = ifmgd->auth_data ? 6956 ifmgd->auth_data->ap_addr : 6957 ifmgd->assoc_data->ap_addr; 6958 6959 /* 6960 * If we are trying to authenticate / associate while suspending, 6961 * cfg80211 won't know and won't actually abort those attempts, 6962 * thus we need to do that ourselves. 6963 */ 6964 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6965 IEEE80211_STYPE_DEAUTH, 6966 WLAN_REASON_DEAUTH_LEAVING, 6967 false, frame_buf); 6968 if (ifmgd->assoc_data) 6969 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6970 if (ifmgd->auth_data) 6971 ieee80211_destroy_auth_data(sdata, false); 6972 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6973 IEEE80211_DEAUTH_FRAME_LEN, 6974 false); 6975 } 6976 6977 /* This is a bit of a hack - we should find a better and more generic 6978 * solution to this. Normally when suspending, cfg80211 will in fact 6979 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6980 * auth (not so important) or assoc (this is the problem) process. 6981 * 6982 * As a consequence, it can happen that we are in the process of both 6983 * associating and suspending, and receive an association response 6984 * after cfg80211 has checked if it needs to disconnect, but before 6985 * we actually set the flag to drop incoming frames. This will then 6986 * cause the workqueue flush to process the association response in 6987 * the suspend, resulting in a successful association just before it 6988 * tries to remove the interface from the driver, which now though 6989 * has a channel context assigned ... this results in issues. 6990 * 6991 * To work around this (for now) simply deauth here again if we're 6992 * now connected. 6993 */ 6994 if (ifmgd->associated && !sdata->local->wowlan) { 6995 u8 bssid[ETH_ALEN]; 6996 struct cfg80211_deauth_request req = { 6997 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6998 .bssid = bssid, 6999 }; 7000 7001 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7002 ieee80211_mgd_deauth(sdata, &req); 7003 } 7004 } 7005 #endif 7006 7007 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 7008 { 7009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7010 7011 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7012 7013 if (!ifmgd->associated) 7014 return; 7015 7016 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 7017 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 7018 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 7019 ieee80211_sta_connection_lost(sdata, 7020 WLAN_REASON_UNSPECIFIED, 7021 true); 7022 return; 7023 } 7024 7025 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 7026 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 7027 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 7028 ieee80211_sta_connection_lost(sdata, 7029 WLAN_REASON_UNSPECIFIED, 7030 true); 7031 return; 7032 } 7033 } 7034 7035 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 7036 struct wiphy_work *work) 7037 { 7038 struct ieee80211_link_data *link = 7039 container_of(work, struct ieee80211_link_data, 7040 u.mgd.request_smps_work); 7041 7042 __ieee80211_request_smps_mgd(link->sdata, link, 7043 link->u.mgd.driver_smps_mode); 7044 } 7045 7046 /* interface setup */ 7047 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 7048 { 7049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7050 7051 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 7052 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 7053 ieee80211_beacon_connection_loss_work); 7054 wiphy_work_init(&ifmgd->csa_connection_drop_work, 7055 ieee80211_csa_connection_drop_work); 7056 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 7057 ieee80211_tdls_peer_del_work); 7058 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 7059 ieee80211_ml_reconf_work); 7060 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 7061 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 7062 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 7063 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 7064 ieee80211_sta_handle_tspec_ac_params_wk); 7065 wiphy_delayed_work_init(&ifmgd->ttlm_work, 7066 ieee80211_tid_to_link_map_work); 7067 7068 ifmgd->flags = 0; 7069 ifmgd->powersave = sdata->wdev.ps; 7070 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 7071 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 7072 /* Setup TDLS data */ 7073 spin_lock_init(&ifmgd->teardown_lock); 7074 ifmgd->teardown_skb = NULL; 7075 ifmgd->orig_teardown_skb = NULL; 7076 } 7077 7078 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 7079 struct wiphy_work *work) 7080 { 7081 struct ieee80211_link_data *link = 7082 container_of(work, struct ieee80211_link_data, 7083 u.mgd.recalc_smps); 7084 7085 ieee80211_recalc_smps(link->sdata, link); 7086 } 7087 7088 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 7089 { 7090 struct ieee80211_sub_if_data *sdata = link->sdata; 7091 struct ieee80211_local *local = sdata->local; 7092 unsigned int link_id = link->link_id; 7093 7094 link->u.mgd.p2p_noa_index = -1; 7095 link->u.mgd.conn_flags = 0; 7096 link->conf->bssid = link->u.mgd.bssid; 7097 link->smps_mode = IEEE80211_SMPS_OFF; 7098 7099 wiphy_work_init(&link->u.mgd.request_smps_work, 7100 ieee80211_request_smps_mgd_work); 7101 wiphy_work_init(&link->u.mgd.recalc_smps, 7102 ieee80211_recalc_smps_work); 7103 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 7104 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 7105 else 7106 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 7107 7108 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 7109 ieee80211_chswitch_work); 7110 7111 if (sdata->u.mgd.assoc_data) 7112 ether_addr_copy(link->conf->addr, 7113 sdata->u.mgd.assoc_data->link[link_id].addr); 7114 else if (!is_valid_ether_addr(link->conf->addr)) 7115 eth_random_addr(link->conf->addr); 7116 } 7117 7118 /* scan finished notification */ 7119 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 7120 { 7121 struct ieee80211_sub_if_data *sdata; 7122 7123 /* Restart STA timers */ 7124 rcu_read_lock(); 7125 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 7126 if (ieee80211_sdata_running(sdata)) 7127 ieee80211_restart_sta_timer(sdata); 7128 } 7129 rcu_read_unlock(); 7130 } 7131 7132 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 7133 struct cfg80211_bss *cbss, s8 link_id, 7134 const u8 *ap_mld_addr, bool assoc, 7135 bool override) 7136 { 7137 struct ieee80211_local *local = sdata->local; 7138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7139 struct ieee80211_bss *bss = (void *)cbss->priv; 7140 struct sta_info *new_sta = NULL; 7141 struct ieee80211_link_data *link; 7142 bool have_sta = false; 7143 bool mlo; 7144 int err; 7145 7146 if (link_id >= 0) { 7147 mlo = true; 7148 if (WARN_ON(!ap_mld_addr)) 7149 return -EINVAL; 7150 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 7151 } else { 7152 if (WARN_ON(ap_mld_addr)) 7153 return -EINVAL; 7154 ap_mld_addr = cbss->bssid; 7155 err = ieee80211_vif_set_links(sdata, 0, 0); 7156 link_id = 0; 7157 mlo = false; 7158 } 7159 7160 if (err) 7161 return err; 7162 7163 link = sdata_dereference(sdata->link[link_id], sdata); 7164 if (WARN_ON(!link)) { 7165 err = -ENOLINK; 7166 goto out_err; 7167 } 7168 7169 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 7170 err = -EINVAL; 7171 goto out_err; 7172 } 7173 7174 /* If a reconfig is happening, bail out */ 7175 if (local->in_reconfig) { 7176 err = -EBUSY; 7177 goto out_err; 7178 } 7179 7180 if (assoc) { 7181 rcu_read_lock(); 7182 have_sta = sta_info_get(sdata, ap_mld_addr); 7183 rcu_read_unlock(); 7184 } 7185 7186 if (!have_sta) { 7187 if (mlo) 7188 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 7189 link_id, cbss->bssid, 7190 GFP_KERNEL); 7191 else 7192 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 7193 7194 if (!new_sta) { 7195 err = -ENOMEM; 7196 goto out_err; 7197 } 7198 7199 new_sta->sta.mlo = mlo; 7200 } 7201 7202 /* 7203 * Set up the information for the new channel before setting the 7204 * new channel. We can't - completely race-free - change the basic 7205 * rates bitmap and the channel (sband) that it refers to, but if 7206 * we set it up before we at least avoid calling into the driver's 7207 * bss_info_changed() method with invalid information (since we do 7208 * call that from changing the channel - only for IDLE and perhaps 7209 * some others, but ...). 7210 * 7211 * So to avoid that, just set up all the new information before the 7212 * channel, but tell the driver to apply it only afterwards, since 7213 * it might need the new channel for that. 7214 */ 7215 if (new_sta) { 7216 const struct cfg80211_bss_ies *ies; 7217 struct link_sta_info *link_sta; 7218 7219 rcu_read_lock(); 7220 link_sta = rcu_dereference(new_sta->link[link_id]); 7221 if (WARN_ON(!link_sta)) { 7222 rcu_read_unlock(); 7223 sta_info_free(local, new_sta); 7224 err = -EINVAL; 7225 goto out_err; 7226 } 7227 7228 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7229 link_sta, cbss); 7230 if (err) { 7231 rcu_read_unlock(); 7232 sta_info_free(local, new_sta); 7233 goto out_err; 7234 } 7235 7236 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7237 7238 /* set timing information */ 7239 link->conf->beacon_int = cbss->beacon_interval; 7240 ies = rcu_dereference(cbss->beacon_ies); 7241 if (ies) { 7242 link->conf->sync_tsf = ies->tsf; 7243 link->conf->sync_device_ts = 7244 bss->device_ts_beacon; 7245 7246 ieee80211_get_dtim(ies, 7247 &link->conf->sync_dtim_count, 7248 NULL); 7249 } else if (!ieee80211_hw_check(&sdata->local->hw, 7250 TIMING_BEACON_ONLY)) { 7251 ies = rcu_dereference(cbss->proberesp_ies); 7252 /* must be non-NULL since beacon IEs were NULL */ 7253 link->conf->sync_tsf = ies->tsf; 7254 link->conf->sync_device_ts = 7255 bss->device_ts_presp; 7256 link->conf->sync_dtim_count = 0; 7257 } else { 7258 link->conf->sync_tsf = 0; 7259 link->conf->sync_device_ts = 0; 7260 link->conf->sync_dtim_count = 0; 7261 } 7262 rcu_read_unlock(); 7263 } 7264 7265 if (new_sta || override) { 7266 err = ieee80211_prep_channel(sdata, link, cbss, mlo, 7267 &link->u.mgd.conn_flags); 7268 if (err) { 7269 if (new_sta) 7270 sta_info_free(local, new_sta); 7271 goto out_err; 7272 } 7273 } 7274 7275 if (new_sta) { 7276 /* 7277 * tell driver about BSSID, basic rates and timing 7278 * this was set up above, before setting the channel 7279 */ 7280 ieee80211_link_info_change_notify(sdata, link, 7281 BSS_CHANGED_BSSID | 7282 BSS_CHANGED_BASIC_RATES | 7283 BSS_CHANGED_BEACON_INT); 7284 7285 if (assoc) 7286 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7287 7288 err = sta_info_insert(new_sta); 7289 new_sta = NULL; 7290 if (err) { 7291 sdata_info(sdata, 7292 "failed to insert STA entry for the AP (error %d)\n", 7293 err); 7294 goto out_err; 7295 } 7296 } else 7297 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7298 7299 /* Cancel scan to ensure that nothing interferes with connection */ 7300 if (local->scanning) 7301 ieee80211_scan_cancel(local); 7302 7303 return 0; 7304 7305 out_err: 7306 ieee80211_link_release_channel(&sdata->deflink); 7307 ieee80211_vif_set_links(sdata, 0, 0); 7308 return err; 7309 } 7310 7311 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 7312 const struct cfg80211_bss_ies *ies, 7313 u8 cur_channel, bool ignore_ecsa) 7314 { 7315 const struct element *csa_elem, *ecsa_elem; 7316 struct ieee80211_channel_sw_ie *csa = NULL; 7317 struct ieee80211_ext_chansw_ie *ecsa = NULL; 7318 7319 if (!ies) 7320 return false; 7321 7322 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 7323 ies->data, ies->len); 7324 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 7325 csa = (void *)csa_elem->data; 7326 7327 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 7328 ies->data, ies->len); 7329 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 7330 ecsa = (void *)ecsa_elem->data; 7331 7332 if (csa && csa->count == 0) 7333 csa = NULL; 7334 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 7335 csa = NULL; 7336 7337 if (ecsa && ecsa->count == 0) 7338 ecsa = NULL; 7339 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 7340 ecsa = NULL; 7341 7342 if (ignore_ecsa && ecsa) { 7343 sdata_info(sdata, 7344 "Ignoring ECSA in probe response - was considered stuck!\n"); 7345 return csa; 7346 } 7347 7348 return csa || ecsa; 7349 } 7350 7351 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 7352 struct cfg80211_bss *bss) 7353 { 7354 u8 cur_channel; 7355 bool ret; 7356 7357 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 7358 7359 rcu_read_lock(); 7360 if (ieee80211_mgd_csa_present(sdata, 7361 rcu_dereference(bss->beacon_ies), 7362 cur_channel, false)) { 7363 ret = true; 7364 goto out; 7365 } 7366 7367 if (ieee80211_mgd_csa_present(sdata, 7368 rcu_dereference(bss->proberesp_ies), 7369 cur_channel, bss->proberesp_ecsa_stuck)) { 7370 ret = true; 7371 goto out; 7372 } 7373 7374 ret = false; 7375 out: 7376 rcu_read_unlock(); 7377 return ret; 7378 } 7379 7380 /* config hooks */ 7381 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 7382 struct cfg80211_auth_request *req) 7383 { 7384 struct ieee80211_local *local = sdata->local; 7385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7386 struct ieee80211_mgd_auth_data *auth_data; 7387 struct ieee80211_link_data *link; 7388 u16 auth_alg; 7389 int err; 7390 bool cont_auth; 7391 7392 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7393 7394 /* prepare auth data structure */ 7395 7396 switch (req->auth_type) { 7397 case NL80211_AUTHTYPE_OPEN_SYSTEM: 7398 auth_alg = WLAN_AUTH_OPEN; 7399 break; 7400 case NL80211_AUTHTYPE_SHARED_KEY: 7401 if (fips_enabled) 7402 return -EOPNOTSUPP; 7403 auth_alg = WLAN_AUTH_SHARED_KEY; 7404 break; 7405 case NL80211_AUTHTYPE_FT: 7406 auth_alg = WLAN_AUTH_FT; 7407 break; 7408 case NL80211_AUTHTYPE_NETWORK_EAP: 7409 auth_alg = WLAN_AUTH_LEAP; 7410 break; 7411 case NL80211_AUTHTYPE_SAE: 7412 auth_alg = WLAN_AUTH_SAE; 7413 break; 7414 case NL80211_AUTHTYPE_FILS_SK: 7415 auth_alg = WLAN_AUTH_FILS_SK; 7416 break; 7417 case NL80211_AUTHTYPE_FILS_SK_PFS: 7418 auth_alg = WLAN_AUTH_FILS_SK_PFS; 7419 break; 7420 case NL80211_AUTHTYPE_FILS_PK: 7421 auth_alg = WLAN_AUTH_FILS_PK; 7422 break; 7423 default: 7424 return -EOPNOTSUPP; 7425 } 7426 7427 if (ifmgd->assoc_data) 7428 return -EBUSY; 7429 7430 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 7431 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 7432 return -EINVAL; 7433 } 7434 7435 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 7436 req->ie_len, GFP_KERNEL); 7437 if (!auth_data) 7438 return -ENOMEM; 7439 7440 memcpy(auth_data->ap_addr, 7441 req->ap_mld_addr ?: req->bss->bssid, 7442 ETH_ALEN); 7443 auth_data->bss = req->bss; 7444 auth_data->link_id = req->link_id; 7445 7446 if (req->auth_data_len >= 4) { 7447 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 7448 __le16 *pos = (__le16 *) req->auth_data; 7449 7450 auth_data->sae_trans = le16_to_cpu(pos[0]); 7451 auth_data->sae_status = le16_to_cpu(pos[1]); 7452 } 7453 memcpy(auth_data->data, req->auth_data + 4, 7454 req->auth_data_len - 4); 7455 auth_data->data_len += req->auth_data_len - 4; 7456 } 7457 7458 /* Check if continuing authentication or trying to authenticate with the 7459 * same BSS that we were in the process of authenticating with and avoid 7460 * removal and re-addition of the STA entry in 7461 * ieee80211_prep_connection(). 7462 */ 7463 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 7464 ifmgd->auth_data->link_id == req->link_id; 7465 7466 if (req->ie && req->ie_len) { 7467 memcpy(&auth_data->data[auth_data->data_len], 7468 req->ie, req->ie_len); 7469 auth_data->data_len += req->ie_len; 7470 } 7471 7472 if (req->key && req->key_len) { 7473 auth_data->key_len = req->key_len; 7474 auth_data->key_idx = req->key_idx; 7475 memcpy(auth_data->key, req->key, req->key_len); 7476 } 7477 7478 auth_data->algorithm = auth_alg; 7479 7480 /* try to authenticate/probe */ 7481 7482 if (ifmgd->auth_data) { 7483 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 7484 auth_data->peer_confirmed = 7485 ifmgd->auth_data->peer_confirmed; 7486 } 7487 ieee80211_destroy_auth_data(sdata, cont_auth); 7488 } 7489 7490 /* prep auth_data so we don't go into idle on disassoc */ 7491 ifmgd->auth_data = auth_data; 7492 7493 /* If this is continuation of an ongoing SAE authentication exchange 7494 * (i.e., request to send SAE Confirm) and the peer has already 7495 * confirmed, mark authentication completed since we are about to send 7496 * out SAE Confirm. 7497 */ 7498 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 7499 auth_data->peer_confirmed && auth_data->sae_trans == 2) 7500 ieee80211_mark_sta_auth(sdata); 7501 7502 if (ifmgd->associated) { 7503 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7504 7505 sdata_info(sdata, 7506 "disconnect from AP %pM for new auth to %pM\n", 7507 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 7508 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7509 WLAN_REASON_UNSPECIFIED, 7510 false, frame_buf); 7511 7512 ieee80211_report_disconnect(sdata, frame_buf, 7513 sizeof(frame_buf), true, 7514 WLAN_REASON_UNSPECIFIED, 7515 false); 7516 } 7517 7518 /* needed for transmitting the auth frame(s) properly */ 7519 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 7520 7521 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 7522 req->ap_mld_addr, cont_auth, false); 7523 if (err) 7524 goto err_clear; 7525 7526 if (req->link_id > 0) 7527 link = sdata_dereference(sdata->link[req->link_id], sdata); 7528 else 7529 link = sdata_dereference(sdata->link[0], sdata); 7530 7531 if (WARN_ON(!link)) { 7532 err = -ENOLINK; 7533 goto err_clear; 7534 } 7535 7536 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 7537 auth_data->ap_addr, link->conf->addr); 7538 7539 err = ieee80211_auth(sdata); 7540 if (err) { 7541 sta_info_destroy_addr(sdata, auth_data->ap_addr); 7542 goto err_clear; 7543 } 7544 7545 /* hold our own reference */ 7546 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 7547 return 0; 7548 7549 err_clear: 7550 if (!ieee80211_vif_is_mld(&sdata->vif)) { 7551 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7552 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7553 BSS_CHANGED_BSSID); 7554 ieee80211_link_release_channel(&sdata->deflink); 7555 } 7556 ifmgd->auth_data = NULL; 7557 kfree(auth_data); 7558 return err; 7559 } 7560 7561 static ieee80211_conn_flags_t 7562 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 7563 struct ieee80211_mgd_assoc_data *assoc_data, 7564 struct cfg80211_assoc_request *req, 7565 ieee80211_conn_flags_t conn_flags, 7566 unsigned int link_id) 7567 { 7568 struct ieee80211_local *local = sdata->local; 7569 const struct cfg80211_bss_ies *bss_ies; 7570 struct ieee80211_supported_band *sband; 7571 const struct element *ht_elem, *vht_elem; 7572 struct ieee80211_link_data *link; 7573 struct cfg80211_bss *cbss; 7574 struct ieee80211_bss *bss; 7575 bool is_5ghz, is_6ghz; 7576 7577 cbss = assoc_data->link[link_id].bss; 7578 if (WARN_ON(!cbss)) 7579 return 0; 7580 7581 bss = (void *)cbss->priv; 7582 7583 sband = local->hw.wiphy->bands[cbss->channel->band]; 7584 if (WARN_ON(!sband)) 7585 return 0; 7586 7587 link = sdata_dereference(sdata->link[link_id], sdata); 7588 if (WARN_ON(!link)) 7589 return 0; 7590 7591 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 7592 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 7593 7594 /* for MLO connections assume advertising all rates is OK */ 7595 if (!req->ap_mld_addr) { 7596 assoc_data->supp_rates = bss->supp_rates; 7597 assoc_data->supp_rates_len = bss->supp_rates_len; 7598 } 7599 7600 /* copy and link elems for the STA profile */ 7601 if (req->links[link_id].elems_len) { 7602 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7603 req->links[link_id].elems_len); 7604 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7605 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7606 assoc_data->ie_pos += req->links[link_id].elems_len; 7607 } 7608 7609 rcu_read_lock(); 7610 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7611 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7612 assoc_data->link[link_id].ap_ht_param = 7613 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7614 else if (!is_6ghz) 7615 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7616 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7617 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7618 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7619 sizeof(struct ieee80211_vht_cap)); 7620 } else if (is_5ghz) { 7621 link_info(link, 7622 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7623 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7624 IEEE80211_CONN_DISABLE_HE | 7625 IEEE80211_CONN_DISABLE_EHT; 7626 } 7627 rcu_read_unlock(); 7628 7629 link->u.mgd.beacon_crc_valid = false; 7630 link->u.mgd.dtim_period = 0; 7631 link->u.mgd.have_beacon = false; 7632 7633 /* override HT/VHT configuration only if the AP and we support it */ 7634 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7635 struct ieee80211_sta_ht_cap sta_ht_cap; 7636 7637 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7638 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7639 } 7640 7641 link->conf->eht_puncturing = 0; 7642 7643 rcu_read_lock(); 7644 bss_ies = rcu_dereference(cbss->beacon_ies); 7645 if (bss_ies) { 7646 u8 dtim_count = 0; 7647 7648 ieee80211_get_dtim(bss_ies, &dtim_count, 7649 &link->u.mgd.dtim_period); 7650 7651 sdata->deflink.u.mgd.have_beacon = true; 7652 7653 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7654 link->conf->sync_tsf = bss_ies->tsf; 7655 link->conf->sync_device_ts = bss->device_ts_beacon; 7656 link->conf->sync_dtim_count = dtim_count; 7657 } 7658 } else { 7659 bss_ies = rcu_dereference(cbss->ies); 7660 } 7661 7662 if (bss_ies) { 7663 const struct ieee80211_eht_operation *eht_oper; 7664 const struct element *elem; 7665 7666 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7667 bss_ies->data, bss_ies->len); 7668 if (elem && elem->datalen >= 3) 7669 link->conf->profile_periodicity = elem->data[2]; 7670 else 7671 link->conf->profile_periodicity = 0; 7672 7673 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7674 bss_ies->data, bss_ies->len); 7675 if (elem && elem->datalen >= 11 && 7676 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7677 link->conf->ema_ap = true; 7678 else 7679 link->conf->ema_ap = false; 7680 7681 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7682 bss_ies->data, bss_ies->len); 7683 eht_oper = (const void *)(elem->data + 1); 7684 7685 if (elem && 7686 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7687 elem->datalen - 1) && 7688 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7689 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7690 const struct ieee80211_eht_operation_info *info = 7691 (void *)eht_oper->optional; 7692 const u8 *disable_subchannel_bitmap = info->optional; 7693 u16 bitmap; 7694 7695 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7696 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7697 &link->conf->chandef) && 7698 !(bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING))) 7699 ieee80211_handle_puncturing_bitmap(link, 7700 eht_oper, 7701 bitmap, 7702 NULL); 7703 else 7704 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7705 } 7706 } 7707 rcu_read_unlock(); 7708 7709 if (bss->corrupt_data) { 7710 char *corrupt_type = "data"; 7711 7712 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7713 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7714 corrupt_type = "beacon and probe response"; 7715 else 7716 corrupt_type = "beacon"; 7717 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7718 corrupt_type = "probe response"; 7719 } 7720 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7721 cbss->bssid, corrupt_type); 7722 } 7723 7724 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7725 if (sdata->u.mgd.powersave) 7726 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7727 else 7728 link->smps_mode = IEEE80211_SMPS_OFF; 7729 } else { 7730 link->smps_mode = link->u.mgd.req_smps; 7731 } 7732 7733 return conn_flags; 7734 } 7735 7736 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7737 struct cfg80211_assoc_request *req) 7738 { 7739 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7740 struct ieee80211_local *local = sdata->local; 7741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7742 struct ieee80211_mgd_assoc_data *assoc_data; 7743 const struct element *ssid_elem; 7744 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7745 ieee80211_conn_flags_t conn_flags = 0; 7746 struct ieee80211_link_data *link; 7747 struct cfg80211_bss *cbss; 7748 struct ieee80211_bss *bss; 7749 bool override; 7750 int i, err; 7751 size_t size = sizeof(*assoc_data) + req->ie_len; 7752 7753 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7754 size += req->links[i].elems_len; 7755 7756 /* FIXME: no support for 4-addr MLO yet */ 7757 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7758 return -EOPNOTSUPP; 7759 7760 assoc_data = kzalloc(size, GFP_KERNEL); 7761 if (!assoc_data) 7762 return -ENOMEM; 7763 7764 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7765 7766 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 7767 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 7768 kfree(assoc_data); 7769 return -EINVAL; 7770 } 7771 7772 rcu_read_lock(); 7773 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7774 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7775 rcu_read_unlock(); 7776 kfree(assoc_data); 7777 return -EINVAL; 7778 } 7779 7780 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7781 assoc_data->ssid_len = ssid_elem->datalen; 7782 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7783 vif_cfg->ssid_len = assoc_data->ssid_len; 7784 rcu_read_unlock(); 7785 7786 if (req->ap_mld_addr) { 7787 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7788 if (!req->links[i].bss) 7789 continue; 7790 link = sdata_dereference(sdata->link[i], sdata); 7791 if (link) 7792 ether_addr_copy(assoc_data->link[i].addr, 7793 link->conf->addr); 7794 else 7795 eth_random_addr(assoc_data->link[i].addr); 7796 } 7797 } else { 7798 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7799 } 7800 7801 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7802 7803 memcpy(assoc_data->ap_addr, 7804 req->ap_mld_addr ?: req->bss->bssid, 7805 ETH_ALEN); 7806 7807 if (ifmgd->associated) { 7808 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7809 7810 sdata_info(sdata, 7811 "disconnect from AP %pM for new assoc to %pM\n", 7812 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7813 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7814 WLAN_REASON_UNSPECIFIED, 7815 false, frame_buf); 7816 7817 ieee80211_report_disconnect(sdata, frame_buf, 7818 sizeof(frame_buf), true, 7819 WLAN_REASON_UNSPECIFIED, 7820 false); 7821 } 7822 7823 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7824 err = -EBUSY; 7825 goto err_free; 7826 } 7827 7828 if (ifmgd->assoc_data) { 7829 err = -EBUSY; 7830 goto err_free; 7831 } 7832 7833 if (ifmgd->auth_data) { 7834 bool match; 7835 7836 /* keep sta info, bssid if matching */ 7837 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7838 assoc_data->ap_addr) && 7839 ifmgd->auth_data->link_id == req->link_id; 7840 7841 /* Cleanup is delayed if auth_data matches */ 7842 if (!match) 7843 ieee80211_destroy_auth_data(sdata, false); 7844 } 7845 7846 /* prepare assoc data */ 7847 7848 bss = (void *)cbss->priv; 7849 assoc_data->wmm = bss->wmm_used && 7850 (local->hw.queues >= IEEE80211_NUM_ACS); 7851 7852 /* 7853 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7854 * We still associate in non-HT mode (11a/b/g) if any one of these 7855 * ciphers is configured as pairwise. 7856 * We can set this to true for non-11n hardware, that'll be checked 7857 * separately along with the peer capabilities. 7858 */ 7859 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7860 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7861 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7862 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7863 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7864 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7865 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7866 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7867 netdev_info(sdata->dev, 7868 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7869 } 7870 } 7871 7872 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7873 if (!bss->wmm_used) { 7874 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7875 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7876 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7877 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7878 netdev_info(sdata->dev, 7879 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7880 } 7881 7882 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7883 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7884 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7885 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7886 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7887 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7888 } 7889 7890 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7891 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7892 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7893 } 7894 7895 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7896 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7897 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7898 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7899 } 7900 7901 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7902 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7903 7904 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7905 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7906 sizeof(ifmgd->ht_capa_mask)); 7907 7908 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7909 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7910 sizeof(ifmgd->vht_capa_mask)); 7911 7912 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7913 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7914 sizeof(ifmgd->s1g_capa_mask)); 7915 7916 if (req->ie && req->ie_len) { 7917 memcpy(assoc_data->ie, req->ie, req->ie_len); 7918 assoc_data->ie_len = req->ie_len; 7919 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7920 } else { 7921 assoc_data->ie_pos = assoc_data->ie; 7922 } 7923 7924 if (req->fils_kek) { 7925 /* should already be checked in cfg80211 - so warn */ 7926 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7927 err = -EINVAL; 7928 goto err_free; 7929 } 7930 memcpy(assoc_data->fils_kek, req->fils_kek, 7931 req->fils_kek_len); 7932 assoc_data->fils_kek_len = req->fils_kek_len; 7933 } 7934 7935 if (req->fils_nonces) 7936 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7937 2 * FILS_NONCE_LEN); 7938 7939 /* default timeout */ 7940 assoc_data->timeout = jiffies; 7941 assoc_data->timeout_started = true; 7942 7943 assoc_data->assoc_link_id = assoc_link_id; 7944 7945 if (req->ap_mld_addr) { 7946 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7947 assoc_data->link[i].conn_flags = conn_flags; 7948 assoc_data->link[i].bss = req->links[i].bss; 7949 assoc_data->link[i].disabled = req->links[i].disabled; 7950 } 7951 7952 /* if there was no authentication, set up the link */ 7953 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 7954 if (err) 7955 goto err_clear; 7956 } else { 7957 assoc_data->link[0].conn_flags = conn_flags; 7958 assoc_data->link[0].bss = cbss; 7959 } 7960 7961 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7962 if (WARN_ON(!link)) { 7963 err = -EINVAL; 7964 goto err_clear; 7965 } 7966 7967 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7968 conn_flags |= link->u.mgd.conn_flags; 7969 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7970 conn_flags, assoc_link_id); 7971 override = link->u.mgd.conn_flags != conn_flags; 7972 link->u.mgd.conn_flags |= conn_flags; 7973 7974 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7975 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7976 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7977 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7978 7979 if (bss->wmm_used && bss->uapsd_supported && 7980 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7981 assoc_data->uapsd = true; 7982 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7983 } else { 7984 assoc_data->uapsd = false; 7985 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7986 } 7987 7988 if (req->prev_bssid) 7989 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7990 7991 if (req->use_mfp) { 7992 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7993 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7994 } else { 7995 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7996 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7997 } 7998 7999 if (req->flags & ASSOC_REQ_USE_RRM) 8000 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 8001 else 8002 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 8003 8004 if (req->crypto.control_port) 8005 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 8006 else 8007 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 8008 8009 sdata->control_port_protocol = req->crypto.control_port_ethertype; 8010 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 8011 sdata->control_port_over_nl80211 = 8012 req->crypto.control_port_over_nl80211; 8013 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 8014 8015 /* kick off associate process */ 8016 ifmgd->assoc_data = assoc_data; 8017 8018 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 8019 if (!assoc_data->link[i].bss) 8020 continue; 8021 if (i == assoc_data->assoc_link_id) 8022 continue; 8023 /* only calculate the flags, hence link == NULL */ 8024 err = ieee80211_prep_channel(sdata, NULL, 8025 assoc_data->link[i].bss, true, 8026 &assoc_data->link[i].conn_flags); 8027 if (err) { 8028 req->links[i].error = err; 8029 goto err_clear; 8030 } 8031 } 8032 8033 /* needed for transmitting the assoc frames properly */ 8034 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 8035 8036 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 8037 req->ap_mld_addr, true, override); 8038 if (err) 8039 goto err_clear; 8040 8041 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 8042 link->u.mgd.conn_flags; 8043 8044 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 8045 const struct cfg80211_bss_ies *beacon_ies; 8046 8047 rcu_read_lock(); 8048 beacon_ies = rcu_dereference(req->bss->beacon_ies); 8049 if (!beacon_ies) { 8050 /* 8051 * Wait up to one beacon interval ... 8052 * should this be more if we miss one? 8053 */ 8054 sdata_info(sdata, "waiting for beacon from %pM\n", 8055 link->u.mgd.bssid); 8056 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 8057 assoc_data->timeout_started = true; 8058 assoc_data->need_beacon = true; 8059 } 8060 rcu_read_unlock(); 8061 } 8062 8063 run_again(sdata, assoc_data->timeout); 8064 8065 /* We are associating, clean up auth_data */ 8066 if (ifmgd->auth_data) 8067 ieee80211_destroy_auth_data(sdata, true); 8068 8069 return 0; 8070 err_clear: 8071 if (!ifmgd->auth_data) { 8072 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8073 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8074 BSS_CHANGED_BSSID); 8075 } 8076 ifmgd->assoc_data = NULL; 8077 err_free: 8078 kfree(assoc_data); 8079 return err; 8080 } 8081 8082 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 8083 struct cfg80211_deauth_request *req) 8084 { 8085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8086 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8087 bool tx = !req->local_state_change; 8088 struct ieee80211_prep_tx_info info = { 8089 .subtype = IEEE80211_STYPE_DEAUTH, 8090 }; 8091 8092 if (ifmgd->auth_data && 8093 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 8094 sdata_info(sdata, 8095 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 8096 req->bssid, req->reason_code, 8097 ieee80211_get_reason_code_string(req->reason_code)); 8098 8099 info.link_id = ifmgd->auth_data->link_id; 8100 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8101 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8102 IEEE80211_STYPE_DEAUTH, 8103 req->reason_code, tx, 8104 frame_buf); 8105 ieee80211_destroy_auth_data(sdata, false); 8106 ieee80211_report_disconnect(sdata, frame_buf, 8107 sizeof(frame_buf), true, 8108 req->reason_code, false); 8109 drv_mgd_complete_tx(sdata->local, sdata, &info); 8110 return 0; 8111 } 8112 8113 if (ifmgd->assoc_data && 8114 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 8115 sdata_info(sdata, 8116 "aborting association with %pM by local choice (Reason: %u=%s)\n", 8117 req->bssid, req->reason_code, 8118 ieee80211_get_reason_code_string(req->reason_code)); 8119 8120 info.link_id = ifmgd->assoc_data->assoc_link_id; 8121 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8122 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8123 IEEE80211_STYPE_DEAUTH, 8124 req->reason_code, tx, 8125 frame_buf); 8126 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8127 ieee80211_report_disconnect(sdata, frame_buf, 8128 sizeof(frame_buf), true, 8129 req->reason_code, false); 8130 drv_mgd_complete_tx(sdata->local, sdata, &info); 8131 return 0; 8132 } 8133 8134 if (ifmgd->associated && 8135 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 8136 sdata_info(sdata, 8137 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 8138 req->bssid, req->reason_code, 8139 ieee80211_get_reason_code_string(req->reason_code)); 8140 8141 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8142 req->reason_code, tx, frame_buf); 8143 ieee80211_report_disconnect(sdata, frame_buf, 8144 sizeof(frame_buf), true, 8145 req->reason_code, false); 8146 drv_mgd_complete_tx(sdata->local, sdata, &info); 8147 return 0; 8148 } 8149 8150 return -ENOTCONN; 8151 } 8152 8153 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 8154 struct cfg80211_disassoc_request *req) 8155 { 8156 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8157 8158 if (!sdata->u.mgd.associated || 8159 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 8160 return -ENOTCONN; 8161 8162 sdata_info(sdata, 8163 "disassociating from %pM by local choice (Reason: %u=%s)\n", 8164 req->ap_addr, req->reason_code, 8165 ieee80211_get_reason_code_string(req->reason_code)); 8166 8167 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 8168 req->reason_code, !req->local_state_change, 8169 frame_buf); 8170 8171 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8172 req->reason_code, false); 8173 8174 return 0; 8175 } 8176 8177 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 8178 { 8179 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8180 &link->u.mgd.request_smps_work); 8181 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8182 &link->u.mgd.recalc_smps); 8183 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 8184 &link->u.mgd.chswitch_work); 8185 } 8186 8187 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 8188 { 8189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8190 8191 /* 8192 * Make sure some work items will not run after this, 8193 * they will not do anything but might not have been 8194 * cancelled when disconnecting. 8195 */ 8196 wiphy_work_cancel(sdata->local->hw.wiphy, 8197 &ifmgd->monitor_work); 8198 wiphy_work_cancel(sdata->local->hw.wiphy, 8199 &ifmgd->beacon_connection_loss_work); 8200 wiphy_work_cancel(sdata->local->hw.wiphy, 8201 &ifmgd->csa_connection_drop_work); 8202 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8203 &ifmgd->tdls_peer_del_work); 8204 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8205 &ifmgd->ml_reconf_work); 8206 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 8207 8208 if (ifmgd->assoc_data) 8209 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8210 if (ifmgd->auth_data) 8211 ieee80211_destroy_auth_data(sdata, false); 8212 spin_lock_bh(&ifmgd->teardown_lock); 8213 if (ifmgd->teardown_skb) { 8214 kfree_skb(ifmgd->teardown_skb); 8215 ifmgd->teardown_skb = NULL; 8216 ifmgd->orig_teardown_skb = NULL; 8217 } 8218 kfree(ifmgd->assoc_req_ies); 8219 ifmgd->assoc_req_ies = NULL; 8220 ifmgd->assoc_req_ies_len = 0; 8221 spin_unlock_bh(&ifmgd->teardown_lock); 8222 del_timer_sync(&ifmgd->timer); 8223 } 8224 8225 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 8226 enum nl80211_cqm_rssi_threshold_event rssi_event, 8227 s32 rssi_level, 8228 gfp_t gfp) 8229 { 8230 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8231 8232 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 8233 8234 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 8235 } 8236 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 8237 8238 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 8239 { 8240 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8241 8242 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 8243 8244 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 8245 } 8246 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 8247 8248 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 8249 int rssi_min_thold, 8250 int rssi_max_thold) 8251 { 8252 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 8253 8254 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 8255 return; 8256 8257 /* 8258 * Scale up threshold values before storing it, as the RSSI averaging 8259 * algorithm uses a scaled up value as well. Change this scaling 8260 * factor if the RSSI averaging algorithm changes. 8261 */ 8262 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 8263 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 8264 } 8265 8266 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 8267 int rssi_min_thold, 8268 int rssi_max_thold) 8269 { 8270 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8271 8272 WARN_ON(rssi_min_thold == rssi_max_thold || 8273 rssi_min_thold > rssi_max_thold); 8274 8275 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 8276 rssi_max_thold); 8277 } 8278 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 8279 8280 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 8281 { 8282 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8283 8284 _ieee80211_enable_rssi_reports(sdata, 0, 0); 8285 } 8286 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 8287