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 - 2023 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 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * Extract from the given disabled subchannel bitmap (raw format 93 * from the EHT Operation Element) the bits for the subchannel 94 * we're using right now. 95 */ 96 static u16 97 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, 98 struct cfg80211_chan_def *chandef, u16 bitmap) 99 { 100 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 101 struct cfg80211_chan_def ap_chandef = *chandef; 102 u32 ap_center_freq, local_center_freq; 103 u32 ap_bw, local_bw; 104 int ap_start_freq, local_start_freq; 105 u16 shift, mask; 106 107 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || 108 !(eht_oper->params & 109 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) 110 return 0; 111 112 /* set 160/320 supported to get the full AP definition */ 113 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 114 true, true, &ap_chandef); 115 ap_center_freq = ap_chandef.center_freq1; 116 ap_bw = 20 * BIT(u8_get_bits(info->control, 117 IEEE80211_EHT_OPER_CHAN_WIDTH)); 118 ap_start_freq = ap_center_freq - ap_bw / 2; 119 local_center_freq = chandef->center_freq1; 120 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 121 local_start_freq = local_center_freq - local_bw / 2; 122 shift = (local_start_freq - ap_start_freq) / 20; 123 mask = BIT(local_bw / 20) - 1; 124 125 return (bitmap >> shift) & mask; 126 } 127 128 /* 129 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 130 * valid bitmap. 131 */ 132 static void 133 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 134 const struct ieee80211_eht_operation *eht_oper, 135 u16 bitmap, u64 *changed) 136 { 137 struct cfg80211_chan_def *chandef = &link->conf->chandef; 138 u16 extracted; 139 u64 _changed = 0; 140 141 if (!changed) 142 changed = &_changed; 143 144 while (chandef->width > NL80211_CHAN_WIDTH_40) { 145 extracted = 146 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 147 bitmap); 148 149 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 150 chandef)) 151 break; 152 link->u.mgd.conn_flags |= 153 ieee80211_chandef_downgrade(chandef); 154 *changed |= BSS_CHANGED_BANDWIDTH; 155 } 156 157 if (chandef->width <= NL80211_CHAN_WIDTH_40) 158 extracted = 0; 159 160 if (link->conf->eht_puncturing != extracted) { 161 link->conf->eht_puncturing = extracted; 162 *changed |= BSS_CHANGED_EHT_PUNCTURING; 163 } 164 } 165 166 /* 167 * We can have multiple work items (and connection probing) 168 * scheduling this timer, but we need to take care to only 169 * reschedule it when it should fire _earlier_ than it was 170 * asked for before, or if it's not pending right now. This 171 * function ensures that. Note that it then is required to 172 * run this function for all timeouts after the first one 173 * has happened -- the work that runs from this timer will 174 * do that. 175 */ 176 static void run_again(struct ieee80211_sub_if_data *sdata, 177 unsigned long timeout) 178 { 179 lockdep_assert_wiphy(sdata->local->hw.wiphy); 180 181 if (!timer_pending(&sdata->u.mgd.timer) || 182 time_before(timeout, sdata->u.mgd.timer.expires)) 183 mod_timer(&sdata->u.mgd.timer, timeout); 184 } 185 186 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 187 { 188 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 189 return; 190 191 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 192 return; 193 194 mod_timer(&sdata->u.mgd.bcn_mon_timer, 195 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 196 } 197 198 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 199 { 200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 201 202 if (unlikely(!ifmgd->associated)) 203 return; 204 205 if (ifmgd->probe_send_count) 206 ifmgd->probe_send_count = 0; 207 208 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 209 return; 210 211 mod_timer(&ifmgd->conn_mon_timer, 212 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 213 } 214 215 static int ecw2cw(int ecw) 216 { 217 return (1 << ecw) - 1; 218 } 219 220 static ieee80211_conn_flags_t 221 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 222 struct ieee80211_link_data *link, 223 ieee80211_conn_flags_t conn_flags, 224 struct ieee80211_supported_band *sband, 225 struct ieee80211_channel *channel, 226 u32 vht_cap_info, 227 const struct ieee80211_ht_operation *ht_oper, 228 const struct ieee80211_vht_operation *vht_oper, 229 const struct ieee80211_he_operation *he_oper, 230 const struct ieee80211_eht_operation *eht_oper, 231 const struct ieee80211_s1g_oper_ie *s1g_oper, 232 struct cfg80211_chan_def *chandef, bool tracking) 233 { 234 struct cfg80211_chan_def vht_chandef; 235 struct ieee80211_sta_ht_cap sta_ht_cap; 236 ieee80211_conn_flags_t ret; 237 u32 ht_cfreq; 238 239 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 240 chandef->chan = channel; 241 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 242 chandef->center_freq1 = channel->center_freq; 243 chandef->freq1_offset = channel->freq_offset; 244 245 if (channel->band == NL80211_BAND_6GHZ) { 246 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 247 chandef)) { 248 mlme_dbg(sdata, 249 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 250 ret = IEEE80211_CONN_DISABLE_HT | 251 IEEE80211_CONN_DISABLE_VHT | 252 IEEE80211_CONN_DISABLE_HE | 253 IEEE80211_CONN_DISABLE_EHT; 254 } else { 255 ret = 0; 256 } 257 vht_chandef = *chandef; 258 goto out; 259 } else if (sband->band == NL80211_BAND_S1GHZ) { 260 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 261 sdata_info(sdata, 262 "Missing S1G Operation Element? Trying operating == primary\n"); 263 chandef->width = ieee80211_s1g_channel_width(channel); 264 } 265 266 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 267 IEEE80211_CONN_DISABLE_VHT | 268 IEEE80211_CONN_DISABLE_80P80MHZ | 269 IEEE80211_CONN_DISABLE_160MHZ; 270 goto out; 271 } 272 273 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 274 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 275 276 if (!ht_oper || !sta_ht_cap.ht_supported) { 277 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 278 ret = IEEE80211_CONN_DISABLE_HT | 279 IEEE80211_CONN_DISABLE_VHT | 280 IEEE80211_CONN_DISABLE_HE | 281 IEEE80211_CONN_DISABLE_EHT; 282 goto out; 283 } 284 285 chandef->width = NL80211_CHAN_WIDTH_20; 286 287 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 288 channel->band); 289 /* check that channel matches the right operating channel */ 290 if (!tracking && channel->center_freq != ht_cfreq) { 291 /* 292 * It's possible that some APs are confused here; 293 * Netgear WNDR3700 sometimes reports 4 higher than 294 * the actual channel in association responses, but 295 * since we look at probe response/beacon data here 296 * it should be OK. 297 */ 298 sdata_info(sdata, 299 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 300 channel->center_freq, ht_cfreq, 301 ht_oper->primary_chan, channel->band); 302 ret = IEEE80211_CONN_DISABLE_HT | 303 IEEE80211_CONN_DISABLE_VHT | 304 IEEE80211_CONN_DISABLE_HE | 305 IEEE80211_CONN_DISABLE_EHT; 306 goto out; 307 } 308 309 /* check 40 MHz support, if we have it */ 310 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 311 ieee80211_chandef_ht_oper(ht_oper, chandef); 312 } else { 313 mlme_dbg(sdata, "40 MHz not supported\n"); 314 /* 40 MHz (and 80 MHz) must be supported for VHT */ 315 ret = IEEE80211_CONN_DISABLE_VHT; 316 /* also mark 40 MHz disabled */ 317 ret |= IEEE80211_CONN_DISABLE_40MHZ; 318 goto out; 319 } 320 321 if (!vht_oper || !sband->vht_cap.vht_supported) { 322 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 323 ret = IEEE80211_CONN_DISABLE_VHT; 324 goto out; 325 } 326 327 vht_chandef = *chandef; 328 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 329 he_oper && 330 (le32_to_cpu(he_oper->he_oper_params) & 331 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 332 struct ieee80211_vht_operation he_oper_vht_cap; 333 334 /* 335 * Set only first 3 bytes (other 2 aren't used in 336 * ieee80211_chandef_vht_oper() anyway) 337 */ 338 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 339 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 340 341 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 342 &he_oper_vht_cap, ht_oper, 343 &vht_chandef)) { 344 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 345 sdata_info(sdata, 346 "HE AP VHT information is invalid, disabling HE\n"); 347 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 348 goto out; 349 } 350 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 351 vht_cap_info, 352 vht_oper, ht_oper, 353 &vht_chandef)) { 354 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 355 sdata_info(sdata, 356 "AP VHT information is invalid, disabling VHT\n"); 357 ret = IEEE80211_CONN_DISABLE_VHT; 358 goto out; 359 } 360 361 if (!cfg80211_chandef_valid(&vht_chandef)) { 362 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 363 sdata_info(sdata, 364 "AP VHT information is invalid, disabling VHT\n"); 365 ret = IEEE80211_CONN_DISABLE_VHT; 366 goto out; 367 } 368 369 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 370 ret = 0; 371 goto out; 372 } 373 374 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 375 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 376 sdata_info(sdata, 377 "AP VHT information doesn't match HT, disabling VHT\n"); 378 ret = IEEE80211_CONN_DISABLE_VHT; 379 goto out; 380 } 381 382 *chandef = vht_chandef; 383 384 /* 385 * handle the case that the EHT operation indicates that it holds EHT 386 * operation information (in case that the channel width differs from 387 * the channel width reported in HT/VHT/HE). 388 */ 389 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 390 struct cfg80211_chan_def eht_chandef = *chandef; 391 392 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 393 eht_chandef.width == 394 NL80211_CHAN_WIDTH_160, 395 false, &eht_chandef); 396 397 if (!cfg80211_chandef_valid(&eht_chandef)) { 398 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 399 sdata_info(sdata, 400 "AP EHT information is invalid, disabling EHT\n"); 401 ret = IEEE80211_CONN_DISABLE_EHT; 402 goto out; 403 } 404 405 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 406 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 407 sdata_info(sdata, 408 "AP EHT information is incompatible, disabling EHT\n"); 409 ret = IEEE80211_CONN_DISABLE_EHT; 410 goto out; 411 } 412 413 *chandef = eht_chandef; 414 } 415 416 ret = 0; 417 418 out: 419 /* 420 * When tracking the current AP, don't do any further checks if the 421 * new chandef is identical to the one we're currently using for the 422 * connection. This keeps us from playing ping-pong with regulatory, 423 * without it the following can happen (for example): 424 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 425 * - AP advertises regdom US 426 * - CRDA loads regdom US with 80 MHz prohibited (old database) 427 * - the code below detects an unsupported channel, downgrades, and 428 * we disconnect from the AP in the caller 429 * - disconnect causes CRDA to reload world regdomain and the game 430 * starts anew. 431 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 432 * 433 * It seems possible that there are still scenarios with CSA or real 434 * bandwidth changes where a this could happen, but those cases are 435 * less common and wouldn't completely prevent using the AP. 436 */ 437 if (tracking && 438 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 439 return ret; 440 441 /* don't print the message below for VHT mismatch if VHT is disabled */ 442 if (ret & IEEE80211_CONN_DISABLE_VHT) 443 vht_chandef = *chandef; 444 445 /* 446 * Ignore the DISABLED flag when we're already connected and only 447 * tracking the APs beacon for bandwidth changes - otherwise we 448 * might get disconnected here if we connect to an AP, update our 449 * regulatory information based on the AP's country IE and the 450 * information we have is wrong/outdated and disables the channel 451 * that we're actually using for the connection to the AP. 452 */ 453 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 454 tracking ? 0 : 455 IEEE80211_CHAN_DISABLED)) { 456 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 457 ret = IEEE80211_CONN_DISABLE_HT | 458 IEEE80211_CONN_DISABLE_VHT | 459 IEEE80211_CONN_DISABLE_HE | 460 IEEE80211_CONN_DISABLE_EHT; 461 break; 462 } 463 464 ret |= ieee80211_chandef_downgrade(chandef); 465 } 466 467 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 468 IEEE80211_CHAN_NO_HE)) 469 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 470 471 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 472 IEEE80211_CHAN_NO_EHT)) 473 ret |= IEEE80211_CONN_DISABLE_EHT; 474 475 if (chandef->width != vht_chandef.width && !tracking) 476 sdata_info(sdata, 477 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 478 479 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 480 return ret; 481 } 482 483 static int ieee80211_config_bw(struct ieee80211_link_data *link, 484 const struct ieee80211_ht_cap *ht_cap, 485 const struct ieee80211_vht_cap *vht_cap, 486 const struct ieee80211_ht_operation *ht_oper, 487 const struct ieee80211_vht_operation *vht_oper, 488 const struct ieee80211_he_operation *he_oper, 489 const struct ieee80211_eht_operation *eht_oper, 490 const struct ieee80211_s1g_oper_ie *s1g_oper, 491 const u8 *bssid, u64 *changed) 492 { 493 struct ieee80211_sub_if_data *sdata = link->sdata; 494 struct ieee80211_local *local = sdata->local; 495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 496 struct ieee80211_channel *chan = link->conf->chandef.chan; 497 struct ieee80211_supported_band *sband = 498 local->hw.wiphy->bands[chan->band]; 499 struct cfg80211_chan_def chandef; 500 u16 ht_opmode; 501 ieee80211_conn_flags_t flags; 502 u32 vht_cap_info = 0; 503 int ret; 504 505 /* if HT was/is disabled, don't track any bandwidth changes */ 506 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 507 return 0; 508 509 /* don't check VHT if we associated as non-VHT station */ 510 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 511 vht_oper = NULL; 512 513 /* don't check HE if we associated as non-HE station */ 514 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 515 !ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 516 he_oper = NULL; 517 eht_oper = NULL; 518 } 519 520 /* don't check EHT if we associated as non-EHT station */ 521 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 522 !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) 523 eht_oper = NULL; 524 525 /* 526 * if bss configuration changed store the new one - 527 * this may be applicable even if channel is identical 528 */ 529 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 530 if (link->conf->ht_operation_mode != ht_opmode) { 531 *changed |= BSS_CHANGED_HT; 532 link->conf->ht_operation_mode = ht_opmode; 533 } 534 535 if (vht_cap) 536 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 537 538 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 539 flags = ieee80211_determine_chantype(sdata, link, 540 link->u.mgd.conn_flags, 541 sband, chan, vht_cap_info, 542 ht_oper, vht_oper, 543 he_oper, eht_oper, 544 s1g_oper, &chandef, true); 545 546 /* 547 * Downgrade the new channel if we associated with restricted 548 * capabilities. For example, if we associated as a 20 MHz STA 549 * to a 40 MHz AP (due to regulatory, capabilities or config 550 * reasons) then switching to a 40 MHz channel now won't do us 551 * any good -- we couldn't use it with the AP. 552 */ 553 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 554 chandef.width == NL80211_CHAN_WIDTH_80P80) 555 flags |= ieee80211_chandef_downgrade(&chandef); 556 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 557 chandef.width == NL80211_CHAN_WIDTH_160) 558 flags |= ieee80211_chandef_downgrade(&chandef); 559 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 560 chandef.width > NL80211_CHAN_WIDTH_20) 561 flags |= ieee80211_chandef_downgrade(&chandef); 562 563 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 564 return 0; 565 566 link_info(link, 567 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 568 link->u.mgd.bssid, chandef.chan->center_freq, 569 chandef.chan->freq_offset, chandef.width, 570 chandef.center_freq1, chandef.freq1_offset, 571 chandef.center_freq2); 572 573 if (flags != (link->u.mgd.conn_flags & 574 (IEEE80211_CONN_DISABLE_HT | 575 IEEE80211_CONN_DISABLE_VHT | 576 IEEE80211_CONN_DISABLE_HE | 577 IEEE80211_CONN_DISABLE_EHT | 578 IEEE80211_CONN_DISABLE_40MHZ | 579 IEEE80211_CONN_DISABLE_80P80MHZ | 580 IEEE80211_CONN_DISABLE_160MHZ | 581 IEEE80211_CONN_DISABLE_320MHZ)) || 582 !cfg80211_chandef_valid(&chandef)) { 583 sdata_info(sdata, 584 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 585 link->u.mgd.bssid, flags, ifmgd->flags); 586 return -EINVAL; 587 } 588 589 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 590 591 if (ret) { 592 sdata_info(sdata, 593 "AP %pM changed bandwidth to incompatible one - disconnect\n", 594 link->u.mgd.bssid); 595 return ret; 596 } 597 598 return 0; 599 } 600 601 /* frame sending functions */ 602 603 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 604 struct sk_buff *skb, u8 ap_ht_param, 605 struct ieee80211_supported_band *sband, 606 struct ieee80211_channel *channel, 607 enum ieee80211_smps_mode smps, 608 ieee80211_conn_flags_t conn_flags) 609 { 610 u8 *pos; 611 u32 flags = channel->flags; 612 u16 cap; 613 struct ieee80211_sta_ht_cap ht_cap; 614 615 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 616 617 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 618 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 619 620 /* determine capability flags */ 621 cap = ht_cap.cap; 622 623 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 624 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 625 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 626 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 627 cap &= ~IEEE80211_HT_CAP_SGI_40; 628 } 629 break; 630 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 631 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 632 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 633 cap &= ~IEEE80211_HT_CAP_SGI_40; 634 } 635 break; 636 } 637 638 /* 639 * If 40 MHz was disabled associate as though we weren't 640 * capable of 40 MHz -- some broken APs will never fall 641 * back to trying to transmit in 20 MHz. 642 */ 643 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 644 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 645 cap &= ~IEEE80211_HT_CAP_SGI_40; 646 } 647 648 /* set SM PS mode properly */ 649 cap &= ~IEEE80211_HT_CAP_SM_PS; 650 switch (smps) { 651 case IEEE80211_SMPS_AUTOMATIC: 652 case IEEE80211_SMPS_NUM_MODES: 653 WARN_ON(1); 654 fallthrough; 655 case IEEE80211_SMPS_OFF: 656 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 657 IEEE80211_HT_CAP_SM_PS_SHIFT; 658 break; 659 case IEEE80211_SMPS_STATIC: 660 cap |= WLAN_HT_CAP_SM_PS_STATIC << 661 IEEE80211_HT_CAP_SM_PS_SHIFT; 662 break; 663 case IEEE80211_SMPS_DYNAMIC: 664 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 665 IEEE80211_HT_CAP_SM_PS_SHIFT; 666 break; 667 } 668 669 /* reserve and fill IE */ 670 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 671 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 672 } 673 674 /* This function determines vht capability flags for the association 675 * and builds the IE. 676 * Note - the function returns true to own the MU-MIMO capability 677 */ 678 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 679 struct sk_buff *skb, 680 struct ieee80211_supported_band *sband, 681 struct ieee80211_vht_cap *ap_vht_cap, 682 ieee80211_conn_flags_t conn_flags) 683 { 684 struct ieee80211_local *local = sdata->local; 685 u8 *pos; 686 u32 cap; 687 struct ieee80211_sta_vht_cap vht_cap; 688 u32 mask, ap_bf_sts, our_bf_sts; 689 bool mu_mimo_owner = false; 690 691 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 692 693 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 694 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 695 696 /* determine capability flags */ 697 cap = vht_cap.cap; 698 699 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 700 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 701 702 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 703 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 704 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 705 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 706 } 707 708 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 709 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 710 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 711 } 712 713 /* 714 * Some APs apparently get confused if our capabilities are better 715 * than theirs, so restrict what we advertise in the assoc request. 716 */ 717 if (!(ap_vht_cap->vht_cap_info & 718 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 719 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 720 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 721 else if (!(ap_vht_cap->vht_cap_info & 722 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 723 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 724 725 /* 726 * If some other vif is using the MU-MIMO capability we cannot associate 727 * using MU-MIMO - this will lead to contradictions in the group-id 728 * mechanism. 729 * Ownership is defined since association request, in order to avoid 730 * simultaneous associations with MU-MIMO. 731 */ 732 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 733 bool disable_mu_mimo = false; 734 struct ieee80211_sub_if_data *other; 735 736 list_for_each_entry_rcu(other, &local->interfaces, list) { 737 if (other->vif.bss_conf.mu_mimo_owner) { 738 disable_mu_mimo = true; 739 break; 740 } 741 } 742 if (disable_mu_mimo) 743 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 744 else 745 mu_mimo_owner = true; 746 } 747 748 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 749 750 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 751 our_bf_sts = cap & mask; 752 753 if (ap_bf_sts < our_bf_sts) { 754 cap &= ~mask; 755 cap |= ap_bf_sts; 756 } 757 758 /* reserve and fill IE */ 759 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 760 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 761 762 return mu_mimo_owner; 763 } 764 765 /* This function determines HE capability flags for the association 766 * and builds the IE. 767 */ 768 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 769 struct sk_buff *skb, 770 struct ieee80211_supported_band *sband, 771 enum ieee80211_smps_mode smps_mode, 772 ieee80211_conn_flags_t conn_flags) 773 { 774 u8 *pos, *pre_he_pos; 775 const struct ieee80211_sta_he_cap *he_cap; 776 u8 he_cap_size; 777 778 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 779 if (WARN_ON(!he_cap)) 780 return; 781 782 /* get a max size estimate */ 783 he_cap_size = 784 2 + 1 + sizeof(he_cap->he_cap_elem) + 785 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 786 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 787 he_cap->he_cap_elem.phy_cap_info); 788 pos = skb_put(skb, he_cap_size); 789 pre_he_pos = pos; 790 pos = ieee80211_ie_build_he_cap(conn_flags, 791 pos, he_cap, pos + he_cap_size); 792 /* trim excess if any */ 793 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 794 795 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 796 } 797 798 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 799 struct sk_buff *skb, 800 struct ieee80211_supported_band *sband) 801 { 802 u8 *pos; 803 const struct ieee80211_sta_he_cap *he_cap; 804 const struct ieee80211_sta_eht_cap *eht_cap; 805 u8 eht_cap_size; 806 807 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 808 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 809 810 /* 811 * EHT capabilities element is only added if the HE capabilities element 812 * was added so assume that 'he_cap' is valid and don't check it. 813 */ 814 if (WARN_ON(!he_cap || !eht_cap)) 815 return; 816 817 eht_cap_size = 818 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 819 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 820 &eht_cap->eht_cap_elem, 821 false) + 822 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 823 eht_cap->eht_cap_elem.phy_cap_info); 824 pos = skb_put(skb, eht_cap_size); 825 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 826 false); 827 } 828 829 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 830 enum nl80211_chan_width width, 831 struct ieee80211_supported_band *sband, 832 struct ieee80211_mgd_assoc_data *assoc_data) 833 { 834 unsigned int rates_len, supp_rates_len; 835 u32 rates = 0; 836 int i, count; 837 u8 *pos; 838 839 if (assoc_data->supp_rates_len) { 840 /* 841 * Get all rates supported by the device and the AP as 842 * some APs don't like getting a superset of their rates 843 * in the association request (e.g. D-Link DAP 1353 in 844 * b-only mode)... 845 */ 846 rates_len = ieee80211_parse_bitrates(width, sband, 847 assoc_data->supp_rates, 848 assoc_data->supp_rates_len, 849 &rates); 850 } else { 851 /* 852 * In case AP not provide any supported rates information 853 * before association, we send information element(s) with 854 * all rates that we support. 855 */ 856 rates_len = sband->n_bitrates; 857 for (i = 0; i < sband->n_bitrates; i++) 858 rates |= BIT(i); 859 } 860 861 supp_rates_len = rates_len; 862 if (supp_rates_len > 8) 863 supp_rates_len = 8; 864 865 pos = skb_put(skb, supp_rates_len + 2); 866 *pos++ = WLAN_EID_SUPP_RATES; 867 *pos++ = supp_rates_len; 868 869 count = 0; 870 for (i = 0; i < sband->n_bitrates; i++) { 871 if (BIT(i) & rates) { 872 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 873 *pos++ = (u8)rate; 874 if (++count == 8) 875 break; 876 } 877 } 878 879 if (rates_len > count) { 880 pos = skb_put(skb, rates_len - count + 2); 881 *pos++ = WLAN_EID_EXT_SUPP_RATES; 882 *pos++ = rates_len - count; 883 884 for (i++; i < sband->n_bitrates; i++) { 885 if (BIT(i) & rates) { 886 int rate; 887 888 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 889 *pos++ = (u8)rate; 890 } 891 } 892 } 893 } 894 895 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 896 const u8 *elems, 897 size_t elems_len, 898 size_t offset) 899 { 900 size_t noffset; 901 902 static const u8 before_ht[] = { 903 WLAN_EID_SSID, 904 WLAN_EID_SUPP_RATES, 905 WLAN_EID_EXT_SUPP_RATES, 906 WLAN_EID_PWR_CAPABILITY, 907 WLAN_EID_SUPPORTED_CHANNELS, 908 WLAN_EID_RSN, 909 WLAN_EID_QOS_CAPA, 910 WLAN_EID_RRM_ENABLED_CAPABILITIES, 911 WLAN_EID_MOBILITY_DOMAIN, 912 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 913 WLAN_EID_RIC_DATA, /* reassoc only */ 914 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 915 }; 916 static const u8 after_ric[] = { 917 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 918 WLAN_EID_HT_CAPABILITY, 919 WLAN_EID_BSS_COEX_2040, 920 /* luckily this is almost always there */ 921 WLAN_EID_EXT_CAPABILITY, 922 WLAN_EID_QOS_TRAFFIC_CAPA, 923 WLAN_EID_TIM_BCAST_REQ, 924 WLAN_EID_INTERWORKING, 925 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 926 WLAN_EID_VHT_CAPABILITY, 927 WLAN_EID_OPMODE_NOTIF, 928 }; 929 930 if (!elems_len) 931 return offset; 932 933 noffset = ieee80211_ie_split_ric(elems, elems_len, 934 before_ht, 935 ARRAY_SIZE(before_ht), 936 after_ric, 937 ARRAY_SIZE(after_ric), 938 offset); 939 skb_put_data(skb, elems + offset, noffset - offset); 940 941 return noffset; 942 } 943 944 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 945 const u8 *elems, 946 size_t elems_len, 947 size_t offset) 948 { 949 static const u8 before_vht[] = { 950 /* 951 * no need to list the ones split off before HT 952 * or generated here 953 */ 954 WLAN_EID_BSS_COEX_2040, 955 WLAN_EID_EXT_CAPABILITY, 956 WLAN_EID_QOS_TRAFFIC_CAPA, 957 WLAN_EID_TIM_BCAST_REQ, 958 WLAN_EID_INTERWORKING, 959 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 960 }; 961 size_t noffset; 962 963 if (!elems_len) 964 return offset; 965 966 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 967 noffset = ieee80211_ie_split(elems, elems_len, 968 before_vht, ARRAY_SIZE(before_vht), 969 offset); 970 skb_put_data(skb, elems + offset, noffset - offset); 971 972 return noffset; 973 } 974 975 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 976 const u8 *elems, 977 size_t elems_len, 978 size_t offset) 979 { 980 static const u8 before_he[] = { 981 /* 982 * no need to list the ones split off before VHT 983 * or generated here 984 */ 985 WLAN_EID_OPMODE_NOTIF, 986 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 987 /* 11ai elements */ 988 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 989 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 990 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 991 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 992 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 993 /* TODO: add 11ah/11aj/11ak elements */ 994 }; 995 size_t noffset; 996 997 if (!elems_len) 998 return offset; 999 1000 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1001 noffset = ieee80211_ie_split(elems, elems_len, 1002 before_he, ARRAY_SIZE(before_he), 1003 offset); 1004 skb_put_data(skb, elems + offset, noffset - offset); 1005 1006 return noffset; 1007 } 1008 1009 #define PRESENT_ELEMS_MAX 8 1010 #define PRESENT_ELEM_EXT_OFFS 0x100 1011 1012 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1013 struct sk_buff *skb, u16 capab, 1014 const struct element *ext_capa, 1015 const u16 *present_elems); 1016 1017 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1018 struct sk_buff *skb, u16 *capab, 1019 const struct element *ext_capa, 1020 const u8 *extra_elems, 1021 size_t extra_elems_len, 1022 unsigned int link_id, 1023 struct ieee80211_link_data *link, 1024 u16 *present_elems) 1025 { 1026 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1028 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1029 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1030 struct ieee80211_channel *chan = cbss->channel; 1031 const struct ieee80211_sband_iftype_data *iftd; 1032 struct ieee80211_local *local = sdata->local; 1033 struct ieee80211_supported_band *sband; 1034 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1035 struct ieee80211_chanctx_conf *chanctx_conf; 1036 enum ieee80211_smps_mode smps_mode; 1037 u16 orig_capab = *capab; 1038 size_t offset = 0; 1039 int present_elems_len = 0; 1040 u8 *pos; 1041 int i; 1042 1043 #define ADD_PRESENT_ELEM(id) do { \ 1044 /* need a last for termination - we use 0 == SSID */ \ 1045 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1046 present_elems[present_elems_len++] = (id); \ 1047 } while (0) 1048 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1049 1050 if (link) 1051 smps_mode = link->smps_mode; 1052 else if (sdata->u.mgd.powersave) 1053 smps_mode = IEEE80211_SMPS_DYNAMIC; 1054 else 1055 smps_mode = IEEE80211_SMPS_OFF; 1056 1057 if (link) { 1058 /* 1059 * 5/10 MHz scenarios are only viable without MLO, in which 1060 * case this pointer should be used ... All of this is a bit 1061 * unclear though, not sure this even works at all. 1062 */ 1063 rcu_read_lock(); 1064 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1065 if (chanctx_conf) 1066 width = chanctx_conf->def.width; 1067 rcu_read_unlock(); 1068 } 1069 1070 sband = local->hw.wiphy->bands[chan->band]; 1071 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1072 1073 if (sband->band == NL80211_BAND_2GHZ) { 1074 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1075 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1076 } 1077 1078 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1079 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1080 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1081 1082 if (sband->band != NL80211_BAND_S1GHZ) 1083 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1084 1085 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1086 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1087 struct cfg80211_chan_def chandef = { 1088 .width = width, 1089 .chan = chan, 1090 }; 1091 1092 pos = skb_put(skb, 4); 1093 *pos++ = WLAN_EID_PWR_CAPABILITY; 1094 *pos++ = 2; 1095 *pos++ = 0; /* min tx power */ 1096 /* max tx power */ 1097 *pos++ = ieee80211_chandef_max_power(&chandef); 1098 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1099 } 1100 1101 /* 1102 * Per spec, we shouldn't include the list of channels if we advertise 1103 * support for extended channel switching, but we've always done that; 1104 * (for now?) apply this restriction only on the (new) 6 GHz band. 1105 */ 1106 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1107 (sband->band != NL80211_BAND_6GHZ || 1108 !ext_capa || ext_capa->datalen < 1 || 1109 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1110 /* TODO: get this in reg domain format */ 1111 pos = skb_put(skb, 2 * sband->n_channels + 2); 1112 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1113 *pos++ = 2 * sband->n_channels; 1114 for (i = 0; i < sband->n_channels; i++) { 1115 int cf = sband->channels[i].center_freq; 1116 1117 *pos++ = ieee80211_frequency_to_channel(cf); 1118 *pos++ = 1; /* one channel in the subband*/ 1119 } 1120 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1121 } 1122 1123 /* if present, add any custom IEs that go before HT */ 1124 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1125 extra_elems_len, 1126 offset); 1127 1128 if (sband->band != NL80211_BAND_6GHZ && 1129 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1130 ieee80211_add_ht_ie(sdata, skb, 1131 assoc_data->link[link_id].ap_ht_param, 1132 sband, chan, smps_mode, 1133 assoc_data->link[link_id].conn_flags); 1134 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1135 } 1136 1137 /* if present, add any custom IEs that go before VHT */ 1138 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1139 extra_elems_len, 1140 offset); 1141 1142 if (sband->band != NL80211_BAND_6GHZ && 1143 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1144 bool mu_mimo_owner = 1145 ieee80211_add_vht_ie(sdata, skb, sband, 1146 &assoc_data->link[link_id].ap_vht_cap, 1147 assoc_data->link[link_id].conn_flags); 1148 1149 if (link) 1150 link->conf->mu_mimo_owner = mu_mimo_owner; 1151 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1152 } 1153 1154 /* 1155 * If AP doesn't support HT, mark HE and EHT as disabled. 1156 * If on the 5GHz band, make sure it supports VHT. 1157 */ 1158 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1159 (sband->band == NL80211_BAND_5GHZ && 1160 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1161 assoc_data->link[link_id].conn_flags |= 1162 IEEE80211_CONN_DISABLE_HE | 1163 IEEE80211_CONN_DISABLE_EHT; 1164 1165 /* if present, add any custom IEs that go before HE */ 1166 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1167 extra_elems_len, 1168 offset); 1169 1170 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1171 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1172 assoc_data->link[link_id].conn_flags); 1173 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1174 } 1175 1176 /* 1177 * careful - need to know about all the present elems before 1178 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1179 * we're going to put it after the ML element 1180 */ 1181 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1182 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1183 1184 if (link_id == assoc_data->assoc_link_id) 1185 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1186 present_elems); 1187 1188 /* crash if somebody gets it wrong */ 1189 present_elems = NULL; 1190 1191 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1192 ieee80211_add_eht_ie(sdata, skb, sband); 1193 1194 if (sband->band == NL80211_BAND_S1GHZ) { 1195 ieee80211_add_aid_request_ie(sdata, skb); 1196 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1197 } 1198 1199 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1200 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1201 1202 if (link) 1203 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1204 1205 return offset; 1206 } 1207 1208 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1209 const u16 *outer, 1210 const u16 *inner) 1211 { 1212 unsigned int skb_len = skb->len; 1213 bool at_extension = false; 1214 bool added = false; 1215 int i, j; 1216 u8 *len, *list_len = NULL; 1217 1218 skb_put_u8(skb, WLAN_EID_EXTENSION); 1219 len = skb_put(skb, 1); 1220 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1221 1222 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1223 u16 elem = outer[i]; 1224 bool have_inner = false; 1225 1226 /* should at least be sorted in the sense of normal -> ext */ 1227 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1228 1229 /* switch to extension list */ 1230 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1231 at_extension = true; 1232 if (!list_len) 1233 skb_put_u8(skb, 0); 1234 list_len = NULL; 1235 } 1236 1237 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1238 if (elem == inner[j]) { 1239 have_inner = true; 1240 break; 1241 } 1242 } 1243 1244 if (have_inner) 1245 continue; 1246 1247 if (!list_len) { 1248 list_len = skb_put(skb, 1); 1249 *list_len = 0; 1250 } 1251 *list_len += 1; 1252 skb_put_u8(skb, (u8)elem); 1253 added = true; 1254 } 1255 1256 /* if we added a list but no extension list, make a zero-len one */ 1257 if (added && (!at_extension || !list_len)) 1258 skb_put_u8(skb, 0); 1259 1260 /* if nothing added remove extension element completely */ 1261 if (!added) 1262 skb_trim(skb, skb_len); 1263 else 1264 *len = skb->len - skb_len - 2; 1265 } 1266 1267 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1268 struct sk_buff *skb, u16 capab, 1269 const struct element *ext_capa, 1270 const u16 *outer_present_elems) 1271 { 1272 struct ieee80211_local *local = sdata->local; 1273 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1274 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1275 struct ieee80211_multi_link_elem *ml_elem; 1276 struct ieee80211_mle_basic_common_info *common; 1277 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1278 __le16 eml_capa = 0, mld_capa_ops = 0; 1279 unsigned int link_id; 1280 u8 *ml_elem_len; 1281 void *capab_pos; 1282 1283 if (!ieee80211_vif_is_mld(&sdata->vif)) 1284 return; 1285 1286 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1287 ieee80211_vif_type_p2p(&sdata->vif)); 1288 if (ift_ext_capa) { 1289 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1290 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1291 } 1292 1293 skb_put_u8(skb, WLAN_EID_EXTENSION); 1294 ml_elem_len = skb_put(skb, 1); 1295 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1296 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1297 ml_elem->control = 1298 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1299 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1300 common = skb_put(skb, sizeof(*common)); 1301 common->len = sizeof(*common) + 1302 2; /* MLD capa/ops */ 1303 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1304 1305 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1306 if (eml_capa & 1307 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1308 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1309 common->len += 2; /* EML capabilities */ 1310 ml_elem->control |= 1311 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1312 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1313 } 1314 /* need indication from userspace to support this */ 1315 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1316 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1317 1318 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1319 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1320 const u8 *extra_elems; 1321 size_t extra_elems_len; 1322 size_t extra_used; 1323 u8 *subelem_len = NULL; 1324 __le16 ctrl; 1325 1326 if (!assoc_data->link[link_id].bss || 1327 link_id == assoc_data->assoc_link_id) 1328 continue; 1329 1330 extra_elems = assoc_data->link[link_id].elems; 1331 extra_elems_len = assoc_data->link[link_id].elems_len; 1332 1333 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1334 subelem_len = skb_put(skb, 1); 1335 1336 ctrl = cpu_to_le16(link_id | 1337 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1338 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1339 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1340 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1341 skb_put_data(skb, assoc_data->link[link_id].addr, 1342 ETH_ALEN); 1343 /* 1344 * Now add the contents of the (re)association request, 1345 * but the "listen interval" and "current AP address" 1346 * (if applicable) are skipped. So we only have 1347 * the capability field (remember the position and fill 1348 * later), followed by the elements added below by 1349 * calling ieee80211_assoc_link_elems(). 1350 */ 1351 capab_pos = skb_put(skb, 2); 1352 1353 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1354 ext_capa, 1355 extra_elems, 1356 extra_elems_len, 1357 link_id, NULL, 1358 link_present_elems); 1359 if (extra_elems) 1360 skb_put_data(skb, extra_elems + extra_used, 1361 extra_elems_len - extra_used); 1362 1363 put_unaligned_le16(capab, capab_pos); 1364 1365 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1366 link_present_elems); 1367 1368 ieee80211_fragment_element(skb, subelem_len, 1369 IEEE80211_MLE_SUBELEM_FRAGMENT); 1370 } 1371 1372 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1373 } 1374 1375 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1376 { 1377 struct ieee80211_local *local = sdata->local; 1378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1379 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1380 struct ieee80211_link_data *link; 1381 struct sk_buff *skb; 1382 struct ieee80211_mgmt *mgmt; 1383 u8 *pos, qos_info, *ie_start; 1384 size_t offset, noffset; 1385 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1386 __le16 listen_int; 1387 struct element *ext_capa = NULL; 1388 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1389 struct ieee80211_prep_tx_info info = {}; 1390 unsigned int link_id, n_links = 0; 1391 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1392 void *capab_pos; 1393 size_t size; 1394 int ret; 1395 1396 /* we know it's writable, cast away the const */ 1397 if (assoc_data->ie_len) 1398 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1399 assoc_data->ie, 1400 assoc_data->ie_len); 1401 1402 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1403 1404 size = local->hw.extra_tx_headroom + 1405 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1406 2 + assoc_data->ssid_len + /* SSID */ 1407 assoc_data->ie_len + /* extra IEs */ 1408 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1409 9; /* WMM */ 1410 1411 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1412 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1413 const struct ieee80211_sband_iftype_data *iftd; 1414 struct ieee80211_supported_band *sband; 1415 1416 if (!cbss) 1417 continue; 1418 1419 sband = local->hw.wiphy->bands[cbss->channel->band]; 1420 1421 n_links++; 1422 /* add STA profile elements length */ 1423 size += assoc_data->link[link_id].elems_len; 1424 /* and supported rates length */ 1425 size += 4 + sband->n_bitrates; 1426 /* supported channels */ 1427 size += 2 + 2 * sband->n_channels; 1428 1429 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1430 if (iftd) 1431 size += iftd->vendor_elems.len; 1432 1433 /* power capability */ 1434 size += 4; 1435 1436 /* HT, VHT, HE, EHT */ 1437 size += 2 + sizeof(struct ieee80211_ht_cap); 1438 size += 2 + sizeof(struct ieee80211_vht_cap); 1439 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1440 sizeof(struct ieee80211_he_mcs_nss_supp) + 1441 IEEE80211_HE_PPE_THRES_MAX_LEN; 1442 1443 if (sband->band == NL80211_BAND_6GHZ) 1444 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1445 1446 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1447 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1448 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1449 1450 /* non-inheritance element */ 1451 size += 2 + 2 + PRESENT_ELEMS_MAX; 1452 1453 /* should be the same across all BSSes */ 1454 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1455 capab |= WLAN_CAPABILITY_PRIVACY; 1456 } 1457 1458 if (ieee80211_vif_is_mld(&sdata->vif)) { 1459 /* consider the multi-link element with STA profile */ 1460 size += sizeof(struct ieee80211_multi_link_elem); 1461 /* max common info field in basic multi-link element */ 1462 size += sizeof(struct ieee80211_mle_basic_common_info) + 1463 2 + /* capa & op */ 1464 2; /* EML capa */ 1465 1466 /* 1467 * The capability elements were already considered above; 1468 * note this over-estimates a bit because there's no 1469 * STA profile for the assoc link. 1470 */ 1471 size += (n_links - 1) * 1472 (1 + 1 + /* subelement ID/length */ 1473 2 + /* STA control */ 1474 1 + ETH_ALEN + 2 /* STA Info field */); 1475 } 1476 1477 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1478 if (WARN_ON(!link)) 1479 return -EINVAL; 1480 1481 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1482 return -EINVAL; 1483 1484 skb = alloc_skb(size, GFP_KERNEL); 1485 if (!skb) 1486 return -ENOMEM; 1487 1488 skb_reserve(skb, local->hw.extra_tx_headroom); 1489 1490 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1491 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1492 1493 /* Set MBSSID support for HE AP if needed */ 1494 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1495 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1496 ext_capa && ext_capa->datalen >= 3) 1497 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1498 1499 mgmt = skb_put_zero(skb, 24); 1500 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1501 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1502 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1503 1504 listen_int = cpu_to_le16(assoc_data->s1g ? 1505 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1506 local->hw.conf.listen_interval); 1507 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1508 skb_put(skb, 10); 1509 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1510 IEEE80211_STYPE_REASSOC_REQ); 1511 capab_pos = &mgmt->u.reassoc_req.capab_info; 1512 mgmt->u.reassoc_req.listen_interval = listen_int; 1513 memcpy(mgmt->u.reassoc_req.current_ap, 1514 assoc_data->prev_ap_addr, ETH_ALEN); 1515 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1516 } else { 1517 skb_put(skb, 4); 1518 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1519 IEEE80211_STYPE_ASSOC_REQ); 1520 capab_pos = &mgmt->u.assoc_req.capab_info; 1521 mgmt->u.assoc_req.listen_interval = listen_int; 1522 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1523 } 1524 1525 /* SSID */ 1526 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1527 ie_start = pos; 1528 *pos++ = WLAN_EID_SSID; 1529 *pos++ = assoc_data->ssid_len; 1530 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1531 1532 /* add the elements for the assoc (main) link */ 1533 link_capab = capab; 1534 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1535 ext_capa, 1536 assoc_data->ie, 1537 assoc_data->ie_len, 1538 assoc_data->assoc_link_id, link, 1539 present_elems); 1540 put_unaligned_le16(link_capab, capab_pos); 1541 1542 /* if present, add any custom non-vendor IEs */ 1543 if (assoc_data->ie_len) { 1544 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1545 assoc_data->ie_len, 1546 offset); 1547 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1548 offset = noffset; 1549 } 1550 1551 if (assoc_data->wmm) { 1552 if (assoc_data->uapsd) { 1553 qos_info = ifmgd->uapsd_queues; 1554 qos_info |= (ifmgd->uapsd_max_sp_len << 1555 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1556 } else { 1557 qos_info = 0; 1558 } 1559 1560 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1561 } 1562 1563 /* add any remaining custom (i.e. vendor specific here) IEs */ 1564 if (assoc_data->ie_len) { 1565 noffset = assoc_data->ie_len; 1566 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1567 } 1568 1569 if (assoc_data->fils_kek_len) { 1570 ret = fils_encrypt_assoc_req(skb, assoc_data); 1571 if (ret < 0) { 1572 dev_kfree_skb(skb); 1573 return ret; 1574 } 1575 } 1576 1577 pos = skb_tail_pointer(skb); 1578 kfree(ifmgd->assoc_req_ies); 1579 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1580 if (!ifmgd->assoc_req_ies) { 1581 dev_kfree_skb(skb); 1582 return -ENOMEM; 1583 } 1584 1585 ifmgd->assoc_req_ies_len = pos - ie_start; 1586 1587 drv_mgd_prepare_tx(local, sdata, &info); 1588 1589 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1590 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1591 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1592 IEEE80211_TX_INTFL_MLME_CONN_TX; 1593 ieee80211_tx_skb(sdata, skb); 1594 1595 return 0; 1596 } 1597 1598 void ieee80211_send_pspoll(struct ieee80211_local *local, 1599 struct ieee80211_sub_if_data *sdata) 1600 { 1601 struct ieee80211_pspoll *pspoll; 1602 struct sk_buff *skb; 1603 1604 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1605 if (!skb) 1606 return; 1607 1608 pspoll = (struct ieee80211_pspoll *) skb->data; 1609 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1610 1611 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1612 ieee80211_tx_skb(sdata, skb); 1613 } 1614 1615 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1616 struct ieee80211_sub_if_data *sdata, 1617 bool powersave) 1618 { 1619 struct sk_buff *skb; 1620 struct ieee80211_hdr_3addr *nullfunc; 1621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1622 1623 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1624 !ieee80211_hw_check(&local->hw, 1625 DOESNT_SUPPORT_QOS_NDP)); 1626 if (!skb) 1627 return; 1628 1629 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1630 if (powersave) 1631 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1632 1633 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1634 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1635 1636 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1637 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1638 1639 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1640 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1641 1642 ieee80211_tx_skb(sdata, skb); 1643 } 1644 1645 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1646 struct ieee80211_sub_if_data *sdata) 1647 { 1648 struct sk_buff *skb; 1649 struct ieee80211_hdr *nullfunc; 1650 __le16 fc; 1651 1652 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1653 return; 1654 1655 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1656 if (!skb) 1657 return; 1658 1659 skb_reserve(skb, local->hw.extra_tx_headroom); 1660 1661 nullfunc = skb_put_zero(skb, 30); 1662 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1663 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1664 nullfunc->frame_control = fc; 1665 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1666 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1667 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1668 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1669 1670 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1671 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1672 ieee80211_tx_skb(sdata, skb); 1673 } 1674 1675 /* spectrum management related things */ 1676 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1677 struct wiphy_work *work) 1678 { 1679 struct ieee80211_link_data *link = 1680 container_of(work, struct ieee80211_link_data, 1681 u.mgd.chswitch_work.work); 1682 struct ieee80211_sub_if_data *sdata = link->sdata; 1683 struct ieee80211_local *local = sdata->local; 1684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1685 int ret; 1686 1687 if (!ieee80211_sdata_running(sdata)) 1688 return; 1689 1690 lockdep_assert_wiphy(local->hw.wiphy); 1691 1692 if (!ifmgd->associated) 1693 return; 1694 1695 if (!link->conf->csa_active) 1696 return; 1697 1698 /* 1699 * using reservation isn't immediate as it may be deferred until later 1700 * with multi-vif. once reservation is complete it will re-schedule the 1701 * work with no reserved_chanctx so verify chandef to check if it 1702 * completed successfully 1703 */ 1704 1705 if (link->reserved_chanctx) { 1706 /* 1707 * with multi-vif csa driver may call ieee80211_csa_finish() 1708 * many times while waiting for other interfaces to use their 1709 * reservations 1710 */ 1711 if (link->reserved_ready) 1712 return; 1713 1714 ret = ieee80211_link_use_reserved_context(link); 1715 if (ret) { 1716 sdata_info(sdata, 1717 "failed to use reserved channel context, disconnecting (err=%d)\n", 1718 ret); 1719 wiphy_work_queue(sdata->local->hw.wiphy, 1720 &ifmgd->csa_connection_drop_work); 1721 } 1722 return; 1723 } 1724 1725 if (!cfg80211_chandef_identical(&link->conf->chandef, 1726 &link->csa_chandef)) { 1727 sdata_info(sdata, 1728 "failed to finalize channel switch, disconnecting\n"); 1729 wiphy_work_queue(sdata->local->hw.wiphy, 1730 &ifmgd->csa_connection_drop_work); 1731 return; 1732 } 1733 1734 link->u.mgd.csa_waiting_bcn = true; 1735 1736 ieee80211_sta_reset_beacon_monitor(sdata); 1737 ieee80211_sta_reset_conn_monitor(sdata); 1738 } 1739 1740 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1741 { 1742 struct ieee80211_sub_if_data *sdata = link->sdata; 1743 struct ieee80211_local *local = sdata->local; 1744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1745 int ret; 1746 1747 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1748 1749 WARN_ON(!link->conf->csa_active); 1750 1751 if (link->csa_block_tx) { 1752 ieee80211_wake_vif_queues(local, sdata, 1753 IEEE80211_QUEUE_STOP_REASON_CSA); 1754 link->csa_block_tx = false; 1755 } 1756 1757 link->conf->csa_active = false; 1758 link->u.mgd.csa_waiting_bcn = false; 1759 /* 1760 * If the CSA IE is still present on the beacon after the switch, 1761 * we need to consider it as a new CSA (possibly to self). 1762 */ 1763 link->u.mgd.beacon_crc_valid = false; 1764 1765 ret = drv_post_channel_switch(link); 1766 if (ret) { 1767 sdata_info(sdata, 1768 "driver post channel switch failed, disconnecting\n"); 1769 wiphy_work_queue(sdata->local->hw.wiphy, 1770 &ifmgd->csa_connection_drop_work); 1771 return; 1772 } 1773 1774 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 1775 link->link_id, 0); 1776 } 1777 1778 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 1779 unsigned int link_id) 1780 { 1781 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1782 1783 trace_api_chswitch_done(sdata, success, link_id); 1784 1785 rcu_read_lock(); 1786 1787 if (!success) { 1788 sdata_info(sdata, 1789 "driver channel switch failed, disconnecting\n"); 1790 wiphy_work_queue(sdata->local->hw.wiphy, 1791 &sdata->u.mgd.csa_connection_drop_work); 1792 } else { 1793 struct ieee80211_link_data *link = 1794 rcu_dereference(sdata->link[link_id]); 1795 1796 if (WARN_ON(!link)) { 1797 rcu_read_unlock(); 1798 return; 1799 } 1800 1801 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1802 &link->u.mgd.chswitch_work, 0); 1803 } 1804 1805 rcu_read_unlock(); 1806 } 1807 EXPORT_SYMBOL(ieee80211_chswitch_done); 1808 1809 static void 1810 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1811 { 1812 struct ieee80211_sub_if_data *sdata = link->sdata; 1813 struct ieee80211_local *local = sdata->local; 1814 1815 lockdep_assert_wiphy(local->hw.wiphy); 1816 1817 if (!local->ops->abort_channel_switch) 1818 return; 1819 1820 ieee80211_link_unreserve_chanctx(link); 1821 1822 if (link->csa_block_tx) 1823 ieee80211_wake_vif_queues(local, sdata, 1824 IEEE80211_QUEUE_STOP_REASON_CSA); 1825 1826 link->csa_block_tx = false; 1827 link->conf->csa_active = false; 1828 1829 drv_abort_channel_switch(sdata); 1830 } 1831 1832 static void 1833 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1834 u64 timestamp, u32 device_timestamp, 1835 struct ieee802_11_elems *elems, 1836 bool beacon) 1837 { 1838 struct ieee80211_sub_if_data *sdata = link->sdata; 1839 struct ieee80211_local *local = sdata->local; 1840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1841 struct cfg80211_bss *cbss = link->u.mgd.bss; 1842 struct ieee80211_chanctx_conf *conf; 1843 struct ieee80211_chanctx *chanctx; 1844 enum nl80211_band current_band; 1845 struct ieee80211_csa_ie csa_ie; 1846 struct ieee80211_channel_switch ch_switch; 1847 struct ieee80211_bss *bss; 1848 unsigned long timeout; 1849 int res; 1850 1851 lockdep_assert_wiphy(local->hw.wiphy); 1852 1853 if (!cbss) 1854 return; 1855 1856 current_band = cbss->channel->band; 1857 bss = (void *)cbss->priv; 1858 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1859 bss->vht_cap_info, 1860 link->u.mgd.conn_flags, 1861 link->u.mgd.bssid, &csa_ie); 1862 1863 if (!res) { 1864 ch_switch.timestamp = timestamp; 1865 ch_switch.device_timestamp = device_timestamp; 1866 ch_switch.block_tx = csa_ie.mode; 1867 ch_switch.chandef = csa_ie.chandef; 1868 ch_switch.count = csa_ie.count; 1869 ch_switch.delay = csa_ie.max_switch_time; 1870 } 1871 1872 if (res < 0) 1873 goto drop_connection; 1874 1875 if (beacon && link->conf->csa_active && 1876 !link->u.mgd.csa_waiting_bcn) { 1877 if (res) 1878 ieee80211_sta_abort_chanswitch(link); 1879 else 1880 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1881 return; 1882 } else if (link->conf->csa_active || res) { 1883 /* disregard subsequent announcements if already processing */ 1884 return; 1885 } 1886 1887 if (link->conf->chandef.chan->band != 1888 csa_ie.chandef.chan->band) { 1889 sdata_info(sdata, 1890 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1891 link->u.mgd.bssid, 1892 csa_ie.chandef.chan->center_freq, 1893 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1894 csa_ie.chandef.center_freq2); 1895 goto drop_connection; 1896 } 1897 1898 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1899 IEEE80211_CHAN_DISABLED)) { 1900 sdata_info(sdata, 1901 "AP %pM switches to unsupported channel " 1902 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1903 "disconnecting\n", 1904 link->u.mgd.bssid, 1905 csa_ie.chandef.chan->center_freq, 1906 csa_ie.chandef.chan->freq_offset, 1907 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1908 csa_ie.chandef.freq1_offset, 1909 csa_ie.chandef.center_freq2); 1910 goto drop_connection; 1911 } 1912 1913 if (cfg80211_chandef_identical(&csa_ie.chandef, 1914 &link->conf->chandef) && 1915 (!csa_ie.mode || !beacon)) { 1916 if (link->u.mgd.csa_ignored_same_chan) 1917 return; 1918 sdata_info(sdata, 1919 "AP %pM tries to chanswitch to same channel, ignore\n", 1920 link->u.mgd.bssid); 1921 link->u.mgd.csa_ignored_same_chan = true; 1922 return; 1923 } 1924 1925 /* 1926 * Drop all TDLS peers - either we disconnect or move to a different 1927 * channel from this point on. There's no telling what our peer will do. 1928 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1929 * have an incompatible wider chandef. 1930 */ 1931 ieee80211_teardown_tdls_peers(sdata); 1932 1933 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1934 lockdep_is_held(&local->hw.wiphy->mtx)); 1935 if (!conf) { 1936 sdata_info(sdata, 1937 "no channel context assigned to vif?, disconnecting\n"); 1938 goto drop_connection; 1939 } 1940 1941 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1942 1943 if (local->use_chanctx && 1944 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1945 sdata_info(sdata, 1946 "driver doesn't support chan-switch with channel contexts\n"); 1947 goto drop_connection; 1948 } 1949 1950 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1951 sdata_info(sdata, 1952 "preparing for channel switch failed, disconnecting\n"); 1953 goto drop_connection; 1954 } 1955 1956 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1957 chanctx->mode, false); 1958 if (res) { 1959 sdata_info(sdata, 1960 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1961 res); 1962 goto drop_connection; 1963 } 1964 1965 link->conf->csa_active = true; 1966 link->csa_chandef = csa_ie.chandef; 1967 link->csa_block_tx = csa_ie.mode; 1968 link->u.mgd.csa_ignored_same_chan = false; 1969 link->u.mgd.beacon_crc_valid = false; 1970 1971 if (link->csa_block_tx) 1972 ieee80211_stop_vif_queues(local, sdata, 1973 IEEE80211_QUEUE_STOP_REASON_CSA); 1974 1975 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1976 link->link_id, csa_ie.count, 1977 csa_ie.mode, 0); 1978 1979 if (local->ops->channel_switch) { 1980 /* use driver's channel switch callback */ 1981 drv_channel_switch(local, sdata, &ch_switch); 1982 return; 1983 } 1984 1985 /* channel switch handled in software */ 1986 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 1987 cbss->beacon_interval); 1988 wiphy_delayed_work_queue(local->hw.wiphy, 1989 &link->u.mgd.chswitch_work, 1990 timeout); 1991 return; 1992 drop_connection: 1993 /* 1994 * This is just so that the disconnect flow will know that 1995 * we were trying to switch channel and failed. In case the 1996 * mode is 1 (we are not allowed to Tx), we will know not to 1997 * send a deauthentication frame. Those two fields will be 1998 * reset when the disconnection worker runs. 1999 */ 2000 link->conf->csa_active = true; 2001 link->csa_block_tx = csa_ie.mode; 2002 2003 wiphy_work_queue(sdata->local->hw.wiphy, 2004 &ifmgd->csa_connection_drop_work); 2005 } 2006 2007 static bool 2008 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2009 struct ieee80211_channel *channel, 2010 const u8 *country_ie, u8 country_ie_len, 2011 const u8 *pwr_constr_elem, 2012 int *chan_pwr, int *pwr_reduction) 2013 { 2014 struct ieee80211_country_ie_triplet *triplet; 2015 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2016 int i, chan_increment; 2017 bool have_chan_pwr = false; 2018 2019 /* Invalid IE */ 2020 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2021 return false; 2022 2023 triplet = (void *)(country_ie + 3); 2024 country_ie_len -= 3; 2025 2026 switch (channel->band) { 2027 default: 2028 WARN_ON_ONCE(1); 2029 fallthrough; 2030 case NL80211_BAND_2GHZ: 2031 case NL80211_BAND_60GHZ: 2032 case NL80211_BAND_LC: 2033 chan_increment = 1; 2034 break; 2035 case NL80211_BAND_5GHZ: 2036 chan_increment = 4; 2037 break; 2038 case NL80211_BAND_6GHZ: 2039 /* 2040 * In the 6 GHz band, the "maximum transmit power level" 2041 * field in the triplets is reserved, and thus will be 2042 * zero and we shouldn't use it to control TX power. 2043 * The actual TX power will be given in the transmit 2044 * power envelope element instead. 2045 */ 2046 return false; 2047 } 2048 2049 /* find channel */ 2050 while (country_ie_len >= 3) { 2051 u8 first_channel = triplet->chans.first_channel; 2052 2053 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2054 goto next; 2055 2056 for (i = 0; i < triplet->chans.num_channels; i++) { 2057 if (first_channel + i * chan_increment == chan) { 2058 have_chan_pwr = true; 2059 *chan_pwr = triplet->chans.max_power; 2060 break; 2061 } 2062 } 2063 if (have_chan_pwr) 2064 break; 2065 2066 next: 2067 triplet++; 2068 country_ie_len -= 3; 2069 } 2070 2071 if (have_chan_pwr && pwr_constr_elem) 2072 *pwr_reduction = *pwr_constr_elem; 2073 else 2074 *pwr_reduction = 0; 2075 2076 return have_chan_pwr; 2077 } 2078 2079 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2080 struct ieee80211_channel *channel, 2081 const u8 *cisco_dtpc_ie, 2082 int *pwr_level) 2083 { 2084 /* From practical testing, the first data byte of the DTPC element 2085 * seems to contain the requested dBm level, and the CLI on Cisco 2086 * APs clearly state the range is -127 to 127 dBm, which indicates 2087 * a signed byte, although it seemingly never actually goes negative. 2088 * The other byte seems to always be zero. 2089 */ 2090 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2091 } 2092 2093 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2094 struct ieee80211_channel *channel, 2095 struct ieee80211_mgmt *mgmt, 2096 const u8 *country_ie, u8 country_ie_len, 2097 const u8 *pwr_constr_ie, 2098 const u8 *cisco_dtpc_ie) 2099 { 2100 struct ieee80211_sub_if_data *sdata = link->sdata; 2101 bool has_80211h_pwr = false, has_cisco_pwr = false; 2102 int chan_pwr = 0, pwr_reduction_80211h = 0; 2103 int pwr_level_cisco, pwr_level_80211h; 2104 int new_ap_level; 2105 __le16 capab = mgmt->u.probe_resp.capab_info; 2106 2107 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2108 return 0; /* TODO */ 2109 2110 if (country_ie && 2111 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2112 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2113 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2114 sdata, channel, country_ie, country_ie_len, 2115 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2116 pwr_level_80211h = 2117 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2118 } 2119 2120 if (cisco_dtpc_ie) { 2121 ieee80211_find_cisco_dtpc( 2122 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2123 has_cisco_pwr = true; 2124 } 2125 2126 if (!has_80211h_pwr && !has_cisco_pwr) 2127 return 0; 2128 2129 /* If we have both 802.11h and Cisco DTPC, apply both limits 2130 * by picking the smallest of the two power levels advertised. 2131 */ 2132 if (has_80211h_pwr && 2133 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2134 new_ap_level = pwr_level_80211h; 2135 2136 if (link->ap_power_level == new_ap_level) 2137 return 0; 2138 2139 sdata_dbg(sdata, 2140 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2141 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2142 link->u.mgd.bssid); 2143 } else { /* has_cisco_pwr is always true here. */ 2144 new_ap_level = pwr_level_cisco; 2145 2146 if (link->ap_power_level == new_ap_level) 2147 return 0; 2148 2149 sdata_dbg(sdata, 2150 "Limiting TX power to %d dBm as advertised by %pM\n", 2151 pwr_level_cisco, link->u.mgd.bssid); 2152 } 2153 2154 link->ap_power_level = new_ap_level; 2155 if (__ieee80211_recalc_txpower(sdata)) 2156 return BSS_CHANGED_TXPOWER; 2157 return 0; 2158 } 2159 2160 /* powersave */ 2161 static void ieee80211_enable_ps(struct ieee80211_local *local, 2162 struct ieee80211_sub_if_data *sdata) 2163 { 2164 struct ieee80211_conf *conf = &local->hw.conf; 2165 2166 /* 2167 * If we are scanning right now then the parameters will 2168 * take effect when scan finishes. 2169 */ 2170 if (local->scanning) 2171 return; 2172 2173 if (conf->dynamic_ps_timeout > 0 && 2174 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2175 mod_timer(&local->dynamic_ps_timer, jiffies + 2176 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2177 } else { 2178 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2179 ieee80211_send_nullfunc(local, sdata, true); 2180 2181 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2182 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2183 return; 2184 2185 conf->flags |= IEEE80211_CONF_PS; 2186 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2187 } 2188 } 2189 2190 static void ieee80211_change_ps(struct ieee80211_local *local) 2191 { 2192 struct ieee80211_conf *conf = &local->hw.conf; 2193 2194 if (local->ps_sdata) { 2195 ieee80211_enable_ps(local, local->ps_sdata); 2196 } else if (conf->flags & IEEE80211_CONF_PS) { 2197 conf->flags &= ~IEEE80211_CONF_PS; 2198 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2199 del_timer_sync(&local->dynamic_ps_timer); 2200 wiphy_work_cancel(local->hw.wiphy, 2201 &local->dynamic_ps_enable_work); 2202 } 2203 } 2204 2205 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2206 { 2207 struct ieee80211_local *local = sdata->local; 2208 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2209 struct sta_info *sta = NULL; 2210 bool authorized = false; 2211 2212 if (!mgd->powersave) 2213 return false; 2214 2215 if (mgd->broken_ap) 2216 return false; 2217 2218 if (!mgd->associated) 2219 return false; 2220 2221 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2222 return false; 2223 2224 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2225 !sdata->deflink.u.mgd.have_beacon) 2226 return false; 2227 2228 rcu_read_lock(); 2229 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2230 if (sta) 2231 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2232 rcu_read_unlock(); 2233 2234 return authorized; 2235 } 2236 2237 /* need to hold RTNL or interface lock */ 2238 void ieee80211_recalc_ps(struct ieee80211_local *local) 2239 { 2240 struct ieee80211_sub_if_data *sdata, *found = NULL; 2241 int count = 0; 2242 int timeout; 2243 2244 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2245 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2246 local->ps_sdata = NULL; 2247 return; 2248 } 2249 2250 list_for_each_entry(sdata, &local->interfaces, list) { 2251 if (!ieee80211_sdata_running(sdata)) 2252 continue; 2253 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2254 /* If an AP vif is found, then disable PS 2255 * by setting the count to zero thereby setting 2256 * ps_sdata to NULL. 2257 */ 2258 count = 0; 2259 break; 2260 } 2261 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2262 continue; 2263 found = sdata; 2264 count++; 2265 } 2266 2267 if (count == 1 && ieee80211_powersave_allowed(found)) { 2268 u8 dtimper = found->deflink.u.mgd.dtim_period; 2269 2270 timeout = local->dynamic_ps_forced_timeout; 2271 if (timeout < 0) 2272 timeout = 100; 2273 local->hw.conf.dynamic_ps_timeout = timeout; 2274 2275 /* If the TIM IE is invalid, pretend the value is 1 */ 2276 if (!dtimper) 2277 dtimper = 1; 2278 2279 local->hw.conf.ps_dtim_period = dtimper; 2280 local->ps_sdata = found; 2281 } else { 2282 local->ps_sdata = NULL; 2283 } 2284 2285 ieee80211_change_ps(local); 2286 } 2287 2288 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2289 { 2290 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2291 2292 if (sdata->vif.cfg.ps != ps_allowed) { 2293 sdata->vif.cfg.ps = ps_allowed; 2294 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2295 } 2296 } 2297 2298 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2299 struct wiphy_work *work) 2300 { 2301 struct ieee80211_local *local = 2302 container_of(work, struct ieee80211_local, 2303 dynamic_ps_disable_work); 2304 2305 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2306 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2307 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2308 } 2309 2310 ieee80211_wake_queues_by_reason(&local->hw, 2311 IEEE80211_MAX_QUEUE_MAP, 2312 IEEE80211_QUEUE_STOP_REASON_PS, 2313 false); 2314 } 2315 2316 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2317 struct wiphy_work *work) 2318 { 2319 struct ieee80211_local *local = 2320 container_of(work, struct ieee80211_local, 2321 dynamic_ps_enable_work); 2322 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2323 struct ieee80211_if_managed *ifmgd; 2324 unsigned long flags; 2325 int q; 2326 2327 /* can only happen when PS was just disabled anyway */ 2328 if (!sdata) 2329 return; 2330 2331 ifmgd = &sdata->u.mgd; 2332 2333 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2334 return; 2335 2336 if (local->hw.conf.dynamic_ps_timeout > 0) { 2337 /* don't enter PS if TX frames are pending */ 2338 if (drv_tx_frames_pending(local)) { 2339 mod_timer(&local->dynamic_ps_timer, jiffies + 2340 msecs_to_jiffies( 2341 local->hw.conf.dynamic_ps_timeout)); 2342 return; 2343 } 2344 2345 /* 2346 * transmission can be stopped by others which leads to 2347 * dynamic_ps_timer expiry. Postpone the ps timer if it 2348 * is not the actual idle state. 2349 */ 2350 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2351 for (q = 0; q < local->hw.queues; q++) { 2352 if (local->queue_stop_reasons[q]) { 2353 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2354 flags); 2355 mod_timer(&local->dynamic_ps_timer, jiffies + 2356 msecs_to_jiffies( 2357 local->hw.conf.dynamic_ps_timeout)); 2358 return; 2359 } 2360 } 2361 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2362 } 2363 2364 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2365 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2366 if (drv_tx_frames_pending(local)) { 2367 mod_timer(&local->dynamic_ps_timer, jiffies + 2368 msecs_to_jiffies( 2369 local->hw.conf.dynamic_ps_timeout)); 2370 } else { 2371 ieee80211_send_nullfunc(local, sdata, true); 2372 /* Flush to get the tx status of nullfunc frame */ 2373 ieee80211_flush_queues(local, sdata, false); 2374 } 2375 } 2376 2377 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2378 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2379 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2380 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2381 local->hw.conf.flags |= IEEE80211_CONF_PS; 2382 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2383 } 2384 } 2385 2386 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2387 { 2388 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2389 2390 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 2391 } 2392 2393 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 2394 { 2395 struct ieee80211_link_data *link = 2396 container_of(work, struct ieee80211_link_data, 2397 dfs_cac_timer_work.work); 2398 struct cfg80211_chan_def chandef = link->conf->chandef; 2399 struct ieee80211_sub_if_data *sdata = link->sdata; 2400 2401 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2402 2403 if (sdata->wdev.cac_started) { 2404 ieee80211_link_release_channel(link); 2405 cfg80211_cac_event(sdata->dev, &chandef, 2406 NL80211_RADAR_CAC_FINISHED, 2407 GFP_KERNEL); 2408 } 2409 } 2410 2411 static bool 2412 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2413 { 2414 struct ieee80211_local *local = sdata->local; 2415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2416 bool ret = false; 2417 int ac; 2418 2419 if (local->hw.queues < IEEE80211_NUM_ACS) 2420 return false; 2421 2422 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2423 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2424 int non_acm_ac; 2425 unsigned long now = jiffies; 2426 2427 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2428 tx_tspec->admitted_time && 2429 time_after(now, tx_tspec->time_slice_start + HZ)) { 2430 tx_tspec->consumed_tx_time = 0; 2431 tx_tspec->time_slice_start = now; 2432 2433 if (tx_tspec->downgraded) 2434 tx_tspec->action = 2435 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2436 } 2437 2438 switch (tx_tspec->action) { 2439 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2440 /* take the original parameters */ 2441 if (drv_conf_tx(local, &sdata->deflink, ac, 2442 &sdata->deflink.tx_conf[ac])) 2443 link_err(&sdata->deflink, 2444 "failed to set TX queue parameters for queue %d\n", 2445 ac); 2446 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2447 tx_tspec->downgraded = false; 2448 ret = true; 2449 break; 2450 case TX_TSPEC_ACTION_DOWNGRADE: 2451 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2452 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2453 ret = true; 2454 break; 2455 } 2456 /* downgrade next lower non-ACM AC */ 2457 for (non_acm_ac = ac + 1; 2458 non_acm_ac < IEEE80211_NUM_ACS; 2459 non_acm_ac++) 2460 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2461 break; 2462 /* Usually the loop will result in using BK even if it 2463 * requires admission control, but such a configuration 2464 * makes no sense and we have to transmit somehow - the 2465 * AC selection does the same thing. 2466 * If we started out trying to downgrade from BK, then 2467 * the extra condition here might be needed. 2468 */ 2469 if (non_acm_ac >= IEEE80211_NUM_ACS) 2470 non_acm_ac = IEEE80211_AC_BK; 2471 if (drv_conf_tx(local, &sdata->deflink, ac, 2472 &sdata->deflink.tx_conf[non_acm_ac])) 2473 link_err(&sdata->deflink, 2474 "failed to set TX queue parameters for queue %d\n", 2475 ac); 2476 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2477 ret = true; 2478 wiphy_delayed_work_queue(local->hw.wiphy, 2479 &ifmgd->tx_tspec_wk, 2480 tx_tspec->time_slice_start + 2481 HZ - now + 1); 2482 break; 2483 case TX_TSPEC_ACTION_NONE: 2484 /* nothing now */ 2485 break; 2486 } 2487 } 2488 2489 return ret; 2490 } 2491 2492 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2493 { 2494 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2495 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2496 BSS_CHANGED_QOS); 2497 } 2498 2499 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 2500 struct wiphy_work *work) 2501 { 2502 struct ieee80211_sub_if_data *sdata; 2503 2504 sdata = container_of(work, struct ieee80211_sub_if_data, 2505 u.mgd.tx_tspec_wk.work); 2506 ieee80211_sta_handle_tspec_ac_params(sdata); 2507 } 2508 2509 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2510 { 2511 struct ieee80211_sub_if_data *sdata = link->sdata; 2512 struct ieee80211_local *local = sdata->local; 2513 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2514 struct ieee80211_tx_queue_params *params = link->tx_conf; 2515 u8 ac; 2516 2517 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2518 mlme_dbg(sdata, 2519 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2520 ac, params[ac].acm, 2521 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2522 params[ac].txop, params[ac].uapsd, 2523 ifmgd->tx_tspec[ac].downgraded); 2524 if (!ifmgd->tx_tspec[ac].downgraded && 2525 drv_conf_tx(local, link, ac, ¶ms[ac])) 2526 link_err(link, 2527 "failed to set TX queue parameters for AC %d\n", 2528 ac); 2529 } 2530 } 2531 2532 /* MLME */ 2533 static bool 2534 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2535 struct ieee80211_link_data *link, 2536 const u8 *wmm_param, size_t wmm_param_len, 2537 const struct ieee80211_mu_edca_param_set *mu_edca) 2538 { 2539 struct ieee80211_sub_if_data *sdata = link->sdata; 2540 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2542 size_t left; 2543 int count, mu_edca_count, ac; 2544 const u8 *pos; 2545 u8 uapsd_queues = 0; 2546 2547 if (!local->ops->conf_tx) 2548 return false; 2549 2550 if (local->hw.queues < IEEE80211_NUM_ACS) 2551 return false; 2552 2553 if (!wmm_param) 2554 return false; 2555 2556 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2557 return false; 2558 2559 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2560 uapsd_queues = ifmgd->uapsd_queues; 2561 2562 count = wmm_param[6] & 0x0f; 2563 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2564 * if mu_edca was preset before and now it disappeared tell 2565 * the driver about it. 2566 */ 2567 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2568 if (count == link->u.mgd.wmm_last_param_set && 2569 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2570 return false; 2571 link->u.mgd.wmm_last_param_set = count; 2572 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2573 2574 pos = wmm_param + 8; 2575 left = wmm_param_len - 8; 2576 2577 memset(¶ms, 0, sizeof(params)); 2578 2579 sdata->wmm_acm = 0; 2580 for (; left >= 4; left -= 4, pos += 4) { 2581 int aci = (pos[0] >> 5) & 0x03; 2582 int acm = (pos[0] >> 4) & 0x01; 2583 bool uapsd = false; 2584 2585 switch (aci) { 2586 case 1: /* AC_BK */ 2587 ac = IEEE80211_AC_BK; 2588 if (acm) 2589 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2590 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2591 uapsd = true; 2592 params[ac].mu_edca = !!mu_edca; 2593 if (mu_edca) 2594 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2595 break; 2596 case 2: /* AC_VI */ 2597 ac = IEEE80211_AC_VI; 2598 if (acm) 2599 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2600 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2601 uapsd = true; 2602 params[ac].mu_edca = !!mu_edca; 2603 if (mu_edca) 2604 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2605 break; 2606 case 3: /* AC_VO */ 2607 ac = IEEE80211_AC_VO; 2608 if (acm) 2609 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2610 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2611 uapsd = true; 2612 params[ac].mu_edca = !!mu_edca; 2613 if (mu_edca) 2614 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2615 break; 2616 case 0: /* AC_BE */ 2617 default: 2618 ac = IEEE80211_AC_BE; 2619 if (acm) 2620 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2621 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2622 uapsd = true; 2623 params[ac].mu_edca = !!mu_edca; 2624 if (mu_edca) 2625 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2626 break; 2627 } 2628 2629 params[ac].aifs = pos[0] & 0x0f; 2630 2631 if (params[ac].aifs < 2) { 2632 link_info(link, 2633 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2634 params[ac].aifs, aci); 2635 params[ac].aifs = 2; 2636 } 2637 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2638 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2639 params[ac].txop = get_unaligned_le16(pos + 2); 2640 params[ac].acm = acm; 2641 params[ac].uapsd = uapsd; 2642 2643 if (params[ac].cw_min == 0 || 2644 params[ac].cw_min > params[ac].cw_max) { 2645 link_info(link, 2646 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2647 params[ac].cw_min, params[ac].cw_max, aci); 2648 return false; 2649 } 2650 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2651 } 2652 2653 /* WMM specification requires all 4 ACIs. */ 2654 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2655 if (params[ac].cw_min == 0) { 2656 link_info(link, 2657 "AP has invalid WMM params (missing AC %d), using defaults\n", 2658 ac); 2659 return false; 2660 } 2661 } 2662 2663 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2664 link->tx_conf[ac] = params[ac]; 2665 2666 ieee80211_mgd_set_link_qos_params(link); 2667 2668 /* enable WMM or activate new settings */ 2669 link->conf->qos = true; 2670 return true; 2671 } 2672 2673 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2674 { 2675 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2676 2677 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2678 ieee80211_run_deferred_scan(sdata->local); 2679 } 2680 2681 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2682 { 2683 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2684 2685 __ieee80211_stop_poll(sdata); 2686 } 2687 2688 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2689 u16 capab, bool erp_valid, u8 erp) 2690 { 2691 struct ieee80211_bss_conf *bss_conf = link->conf; 2692 struct ieee80211_supported_band *sband; 2693 u64 changed = 0; 2694 bool use_protection; 2695 bool use_short_preamble; 2696 bool use_short_slot; 2697 2698 sband = ieee80211_get_link_sband(link); 2699 if (!sband) 2700 return changed; 2701 2702 if (erp_valid) { 2703 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2704 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2705 } else { 2706 use_protection = false; 2707 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2708 } 2709 2710 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2711 if (sband->band == NL80211_BAND_5GHZ || 2712 sband->band == NL80211_BAND_6GHZ) 2713 use_short_slot = true; 2714 2715 if (use_protection != bss_conf->use_cts_prot) { 2716 bss_conf->use_cts_prot = use_protection; 2717 changed |= BSS_CHANGED_ERP_CTS_PROT; 2718 } 2719 2720 if (use_short_preamble != bss_conf->use_short_preamble) { 2721 bss_conf->use_short_preamble = use_short_preamble; 2722 changed |= BSS_CHANGED_ERP_PREAMBLE; 2723 } 2724 2725 if (use_short_slot != bss_conf->use_short_slot) { 2726 bss_conf->use_short_slot = use_short_slot; 2727 changed |= BSS_CHANGED_ERP_SLOT; 2728 } 2729 2730 return changed; 2731 } 2732 2733 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2734 struct cfg80211_bss *cbss) 2735 { 2736 struct ieee80211_sub_if_data *sdata = link->sdata; 2737 struct ieee80211_bss_conf *bss_conf = link->conf; 2738 struct ieee80211_bss *bss = (void *)cbss->priv; 2739 u64 changed = BSS_CHANGED_QOS; 2740 2741 /* not really used in MLO */ 2742 sdata->u.mgd.beacon_timeout = 2743 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2744 bss_conf->beacon_int)); 2745 2746 changed |= ieee80211_handle_bss_capability(link, 2747 bss_conf->assoc_capability, 2748 bss->has_erp_value, 2749 bss->erp_value); 2750 2751 ieee80211_check_rate_mask(link); 2752 2753 link->u.mgd.bss = cbss; 2754 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2755 2756 if (sdata->vif.p2p || 2757 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2758 const struct cfg80211_bss_ies *ies; 2759 2760 rcu_read_lock(); 2761 ies = rcu_dereference(cbss->ies); 2762 if (ies) { 2763 int ret; 2764 2765 ret = cfg80211_get_p2p_attr( 2766 ies->data, ies->len, 2767 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2768 (u8 *) &bss_conf->p2p_noa_attr, 2769 sizeof(bss_conf->p2p_noa_attr)); 2770 if (ret >= 2) { 2771 link->u.mgd.p2p_noa_index = 2772 bss_conf->p2p_noa_attr.index; 2773 changed |= BSS_CHANGED_P2P_PS; 2774 } 2775 } 2776 rcu_read_unlock(); 2777 } 2778 2779 if (link->u.mgd.have_beacon) { 2780 bss_conf->beacon_rate = bss->beacon_rate; 2781 changed |= BSS_CHANGED_BEACON_INFO; 2782 } else { 2783 bss_conf->beacon_rate = NULL; 2784 } 2785 2786 /* Tell the driver to monitor connection quality (if supported) */ 2787 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2788 bss_conf->cqm_rssi_thold) 2789 changed |= BSS_CHANGED_CQM; 2790 2791 return changed; 2792 } 2793 2794 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2795 struct ieee80211_mgd_assoc_data *assoc_data, 2796 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2797 { 2798 struct ieee80211_local *local = sdata->local; 2799 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2800 u64 vif_changed = BSS_CHANGED_ASSOC; 2801 unsigned int link_id; 2802 2803 lockdep_assert_wiphy(local->hw.wiphy); 2804 2805 sdata->u.mgd.associated = true; 2806 2807 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2808 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2809 struct ieee80211_link_data *link; 2810 2811 if (!cbss || 2812 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2813 continue; 2814 2815 if (ieee80211_vif_is_mld(&sdata->vif) && 2816 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 2817 continue; 2818 2819 link = sdata_dereference(sdata->link[link_id], sdata); 2820 if (WARN_ON(!link)) 2821 return; 2822 2823 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2824 } 2825 2826 /* just to be sure */ 2827 ieee80211_stop_poll(sdata); 2828 2829 ieee80211_led_assoc(local, 1); 2830 2831 vif_cfg->assoc = 1; 2832 2833 /* Enable ARP filtering */ 2834 if (vif_cfg->arp_addr_cnt) 2835 vif_changed |= BSS_CHANGED_ARP_FILTER; 2836 2837 if (ieee80211_vif_is_mld(&sdata->vif)) { 2838 for (link_id = 0; 2839 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2840 link_id++) { 2841 struct ieee80211_link_data *link; 2842 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2843 2844 if (!cbss || 2845 !(BIT(link_id) & 2846 ieee80211_vif_usable_links(&sdata->vif)) || 2847 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2848 continue; 2849 2850 link = sdata_dereference(sdata->link[link_id], sdata); 2851 if (WARN_ON(!link)) 2852 return; 2853 2854 ieee80211_link_info_change_notify(sdata, link, 2855 changed[link_id]); 2856 2857 ieee80211_recalc_smps(sdata, link); 2858 } 2859 2860 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2861 } else { 2862 ieee80211_bss_info_change_notify(sdata, 2863 vif_changed | changed[0]); 2864 } 2865 2866 ieee80211_recalc_ps(local); 2867 2868 /* leave this here to not change ordering in non-MLO cases */ 2869 if (!ieee80211_vif_is_mld(&sdata->vif)) 2870 ieee80211_recalc_smps(sdata, &sdata->deflink); 2871 ieee80211_recalc_ps_vif(sdata); 2872 2873 netif_carrier_on(sdata->dev); 2874 } 2875 2876 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2877 u16 stype, u16 reason, bool tx, 2878 u8 *frame_buf) 2879 { 2880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2881 struct ieee80211_local *local = sdata->local; 2882 unsigned int link_id; 2883 u64 changed = 0; 2884 struct ieee80211_prep_tx_info info = { 2885 .subtype = stype, 2886 }; 2887 2888 lockdep_assert_wiphy(local->hw.wiphy); 2889 2890 if (WARN_ON_ONCE(tx && !frame_buf)) 2891 return; 2892 2893 if (WARN_ON(!ifmgd->associated)) 2894 return; 2895 2896 ieee80211_stop_poll(sdata); 2897 2898 ifmgd->associated = false; 2899 2900 /* other links will be destroyed */ 2901 sdata->deflink.u.mgd.bss = NULL; 2902 2903 netif_carrier_off(sdata->dev); 2904 2905 /* 2906 * if we want to get out of ps before disassoc (why?) we have 2907 * to do it before sending disassoc, as otherwise the null-packet 2908 * won't be valid. 2909 */ 2910 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2911 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2912 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2913 } 2914 local->ps_sdata = NULL; 2915 2916 /* disable per-vif ps */ 2917 ieee80211_recalc_ps_vif(sdata); 2918 2919 /* make sure ongoing transmission finishes */ 2920 synchronize_net(); 2921 2922 /* 2923 * drop any frame before deauth/disassoc, this can be data or 2924 * management frame. Since we are disconnecting, we should not 2925 * insist sending these frames which can take time and delay 2926 * the disconnection and possible the roaming. 2927 */ 2928 if (tx) 2929 ieee80211_flush_queues(local, sdata, true); 2930 2931 /* deauthenticate/disassociate now */ 2932 if (tx || frame_buf) { 2933 /* 2934 * In multi channel scenarios guarantee that the virtual 2935 * interface is granted immediate airtime to transmit the 2936 * deauthentication frame by calling mgd_prepare_tx, if the 2937 * driver requested so. 2938 */ 2939 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2940 !sdata->deflink.u.mgd.have_beacon) { 2941 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2942 } 2943 2944 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2945 sdata->vif.cfg.ap_addr, stype, 2946 reason, tx, frame_buf); 2947 } 2948 2949 /* flush out frame - make sure the deauth was actually sent */ 2950 if (tx) 2951 ieee80211_flush_queues(local, sdata, false); 2952 2953 drv_mgd_complete_tx(sdata->local, sdata, &info); 2954 2955 /* clear AP addr only after building the needed mgmt frames */ 2956 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2957 eth_zero_addr(sdata->vif.cfg.ap_addr); 2958 2959 sdata->vif.cfg.ssid_len = 0; 2960 2961 /* remove AP and TDLS peers */ 2962 sta_info_flush(sdata); 2963 2964 /* finally reset all BSS / config parameters */ 2965 if (!ieee80211_vif_is_mld(&sdata->vif)) 2966 changed |= ieee80211_reset_erp_info(sdata); 2967 2968 ieee80211_led_assoc(local, 0); 2969 changed |= BSS_CHANGED_ASSOC; 2970 sdata->vif.cfg.assoc = false; 2971 2972 sdata->deflink.u.mgd.p2p_noa_index = -1; 2973 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2974 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2975 2976 /* on the next assoc, re-program HT/VHT parameters */ 2977 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2978 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2979 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2980 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2981 2982 /* 2983 * reset MU-MIMO ownership and group data in default link, 2984 * if used, other links are destroyed 2985 */ 2986 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2987 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2988 memset(sdata->vif.bss_conf.mu_group.position, 0, 2989 sizeof(sdata->vif.bss_conf.mu_group.position)); 2990 if (!ieee80211_vif_is_mld(&sdata->vif)) 2991 changed |= BSS_CHANGED_MU_GROUPS; 2992 sdata->vif.bss_conf.mu_mimo_owner = false; 2993 2994 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2995 2996 del_timer_sync(&local->dynamic_ps_timer); 2997 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 2998 2999 /* Disable ARP filtering */ 3000 if (sdata->vif.cfg.arp_addr_cnt) 3001 changed |= BSS_CHANGED_ARP_FILTER; 3002 3003 sdata->vif.bss_conf.qos = false; 3004 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3005 changed |= BSS_CHANGED_QOS; 3006 /* The BSSID (not really interesting) and HT changed */ 3007 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3008 ieee80211_bss_info_change_notify(sdata, changed); 3009 } else { 3010 ieee80211_vif_cfg_change_notify(sdata, changed); 3011 } 3012 3013 /* disassociated - set to defaults now */ 3014 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3015 3016 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3017 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3018 del_timer_sync(&sdata->u.mgd.timer); 3019 3020 sdata->vif.bss_conf.dtim_period = 0; 3021 sdata->vif.bss_conf.beacon_rate = NULL; 3022 3023 sdata->deflink.u.mgd.have_beacon = false; 3024 sdata->deflink.u.mgd.tracking_signal_avg = false; 3025 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3026 3027 ifmgd->flags = 0; 3028 sdata->deflink.u.mgd.conn_flags = 0; 3029 3030 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3031 struct ieee80211_link_data *link; 3032 3033 link = sdata_dereference(sdata->link[link_id], sdata); 3034 if (!link) 3035 continue; 3036 ieee80211_link_release_channel(link); 3037 } 3038 3039 sdata->vif.bss_conf.csa_active = false; 3040 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3041 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3042 if (sdata->deflink.csa_block_tx) { 3043 ieee80211_wake_vif_queues(local, sdata, 3044 IEEE80211_QUEUE_STOP_REASON_CSA); 3045 sdata->deflink.csa_block_tx = false; 3046 } 3047 3048 /* existing TX TSPEC sessions no longer exist */ 3049 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3050 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3051 3052 sdata->vif.bss_conf.pwr_reduction = 0; 3053 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3054 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3055 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3056 3057 memset(&sdata->u.mgd.ttlm_info, 0, 3058 sizeof(sdata->u.mgd.ttlm_info)); 3059 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3060 ieee80211_vif_set_links(sdata, 0, 0); 3061 } 3062 3063 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3064 { 3065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3066 struct ieee80211_local *local = sdata->local; 3067 3068 lockdep_assert_wiphy(local->hw.wiphy); 3069 3070 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3071 return; 3072 3073 __ieee80211_stop_poll(sdata); 3074 3075 ieee80211_recalc_ps(local); 3076 3077 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3078 return; 3079 3080 /* 3081 * We've received a probe response, but are not sure whether 3082 * we have or will be receiving any beacons or data, so let's 3083 * schedule the timers again, just in case. 3084 */ 3085 ieee80211_sta_reset_beacon_monitor(sdata); 3086 3087 mod_timer(&ifmgd->conn_mon_timer, 3088 round_jiffies_up(jiffies + 3089 IEEE80211_CONNECTION_IDLE_TIME)); 3090 } 3091 3092 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3093 struct ieee80211_hdr *hdr, 3094 u16 tx_time) 3095 { 3096 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3097 u16 tid; 3098 int ac; 3099 struct ieee80211_sta_tx_tspec *tx_tspec; 3100 unsigned long now = jiffies; 3101 3102 if (!ieee80211_is_data_qos(hdr->frame_control)) 3103 return; 3104 3105 tid = ieee80211_get_tid(hdr); 3106 ac = ieee80211_ac_from_tid(tid); 3107 tx_tspec = &ifmgd->tx_tspec[ac]; 3108 3109 if (likely(!tx_tspec->admitted_time)) 3110 return; 3111 3112 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3113 tx_tspec->consumed_tx_time = 0; 3114 tx_tspec->time_slice_start = now; 3115 3116 if (tx_tspec->downgraded) { 3117 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3118 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3119 &ifmgd->tx_tspec_wk, 0); 3120 } 3121 } 3122 3123 if (tx_tspec->downgraded) 3124 return; 3125 3126 tx_tspec->consumed_tx_time += tx_time; 3127 3128 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3129 tx_tspec->downgraded = true; 3130 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3131 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3132 &ifmgd->tx_tspec_wk, 0); 3133 } 3134 } 3135 3136 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3137 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3138 { 3139 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3140 3141 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3142 !sdata->u.mgd.probe_send_count) 3143 return; 3144 3145 if (ack) 3146 sdata->u.mgd.probe_send_count = 0; 3147 else 3148 sdata->u.mgd.nullfunc_failed = true; 3149 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3150 } 3151 3152 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3153 const u8 *src, const u8 *dst, 3154 const u8 *ssid, size_t ssid_len, 3155 struct ieee80211_channel *channel) 3156 { 3157 struct sk_buff *skb; 3158 3159 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3160 ssid, ssid_len, NULL, 0, 3161 IEEE80211_PROBE_FLAG_DIRECTED); 3162 if (skb) 3163 ieee80211_tx_skb(sdata, skb); 3164 } 3165 3166 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3167 { 3168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3169 u8 *dst = sdata->vif.cfg.ap_addr; 3170 u8 unicast_limit = max(1, max_probe_tries - 3); 3171 struct sta_info *sta; 3172 3173 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3174 3175 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3176 return; 3177 3178 /* 3179 * Try sending broadcast probe requests for the last three 3180 * probe requests after the first ones failed since some 3181 * buggy APs only support broadcast probe requests. 3182 */ 3183 if (ifmgd->probe_send_count >= unicast_limit) 3184 dst = NULL; 3185 3186 /* 3187 * When the hardware reports an accurate Tx ACK status, it's 3188 * better to send a nullfunc frame instead of a probe request, 3189 * as it will kick us off the AP quickly if we aren't associated 3190 * anymore. The timeout will be reset if the frame is ACKed by 3191 * the AP. 3192 */ 3193 ifmgd->probe_send_count++; 3194 3195 if (dst) { 3196 sta = sta_info_get(sdata, dst); 3197 if (!WARN_ON(!sta)) 3198 ieee80211_check_fast_rx(sta); 3199 } 3200 3201 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3202 ifmgd->nullfunc_failed = false; 3203 ieee80211_send_nullfunc(sdata->local, sdata, false); 3204 } else { 3205 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3206 sdata->vif.cfg.ssid, 3207 sdata->vif.cfg.ssid_len, 3208 sdata->deflink.u.mgd.bss->channel); 3209 } 3210 3211 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3212 run_again(sdata, ifmgd->probe_timeout); 3213 } 3214 3215 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3216 bool beacon) 3217 { 3218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3219 bool already = false; 3220 3221 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3222 3223 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3224 return; 3225 3226 if (!ieee80211_sdata_running(sdata)) 3227 return; 3228 3229 if (!ifmgd->associated) 3230 return; 3231 3232 if (sdata->local->tmp_channel || sdata->local->scanning) 3233 return; 3234 3235 if (sdata->local->suspending) { 3236 /* reschedule after resume */ 3237 ieee80211_reset_ap_probe(sdata); 3238 return; 3239 } 3240 3241 if (beacon) { 3242 mlme_dbg_ratelimited(sdata, 3243 "detected beacon loss from AP (missed %d beacons) - probing\n", 3244 beacon_loss_count); 3245 3246 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3247 } 3248 3249 /* 3250 * The driver/our work has already reported this event or the 3251 * connection monitoring has kicked in and we have already sent 3252 * a probe request. Or maybe the AP died and the driver keeps 3253 * reporting until we disassociate... 3254 * 3255 * In either case we have to ignore the current call to this 3256 * function (except for setting the correct probe reason bit) 3257 * because otherwise we would reset the timer every time and 3258 * never check whether we received a probe response! 3259 */ 3260 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3261 already = true; 3262 3263 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3264 3265 if (already) 3266 return; 3267 3268 ieee80211_recalc_ps(sdata->local); 3269 3270 ifmgd->probe_send_count = 0; 3271 ieee80211_mgd_probe_ap_send(sdata); 3272 } 3273 3274 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3275 struct ieee80211_vif *vif) 3276 { 3277 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3279 struct cfg80211_bss *cbss; 3280 struct sk_buff *skb; 3281 const struct element *ssid; 3282 int ssid_len; 3283 3284 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3285 3286 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3287 ieee80211_vif_is_mld(&sdata->vif))) 3288 return NULL; 3289 3290 if (ifmgd->associated) 3291 cbss = sdata->deflink.u.mgd.bss; 3292 else if (ifmgd->auth_data) 3293 cbss = ifmgd->auth_data->bss; 3294 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3295 cbss = ifmgd->assoc_data->link[0].bss; 3296 else 3297 return NULL; 3298 3299 rcu_read_lock(); 3300 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3301 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3302 "invalid SSID element (len=%d)", 3303 ssid ? ssid->datalen : -1)) 3304 ssid_len = 0; 3305 else 3306 ssid_len = ssid->datalen; 3307 3308 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3309 (u32) -1, cbss->channel, 3310 ssid->data, ssid_len, 3311 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3312 rcu_read_unlock(); 3313 3314 return skb; 3315 } 3316 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3317 3318 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3319 const u8 *buf, size_t len, bool tx, 3320 u16 reason, bool reconnect) 3321 { 3322 struct ieee80211_event event = { 3323 .type = MLME_EVENT, 3324 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3325 .u.mlme.reason = reason, 3326 }; 3327 3328 if (tx) 3329 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3330 else 3331 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3332 3333 drv_event_callback(sdata->local, sdata, &event); 3334 } 3335 3336 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3337 { 3338 struct ieee80211_local *local = sdata->local; 3339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3340 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3341 bool tx; 3342 3343 lockdep_assert_wiphy(local->hw.wiphy); 3344 3345 if (!ifmgd->associated) 3346 return; 3347 3348 /* in MLO assume we have a link where we can TX the frame */ 3349 tx = ieee80211_vif_is_mld(&sdata->vif) || 3350 !sdata->deflink.csa_block_tx; 3351 3352 if (!ifmgd->driver_disconnect) { 3353 unsigned int link_id; 3354 3355 /* 3356 * AP is probably out of range (or not reachable for another 3357 * reason) so remove the bss structs for that AP. In the case 3358 * of multi-link, it's not clear that all of them really are 3359 * out of range, but if they weren't the driver likely would 3360 * have switched to just have a single link active? 3361 */ 3362 for (link_id = 0; 3363 link_id < ARRAY_SIZE(sdata->link); 3364 link_id++) { 3365 struct ieee80211_link_data *link; 3366 3367 link = sdata_dereference(sdata->link[link_id], sdata); 3368 if (!link) 3369 continue; 3370 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3371 link->u.mgd.bss = NULL; 3372 } 3373 } 3374 3375 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3376 ifmgd->driver_disconnect ? 3377 WLAN_REASON_DEAUTH_LEAVING : 3378 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3379 tx, frame_buf); 3380 /* the other links will be destroyed */ 3381 sdata->vif.bss_conf.csa_active = false; 3382 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3383 if (sdata->deflink.csa_block_tx) { 3384 ieee80211_wake_vif_queues(local, sdata, 3385 IEEE80211_QUEUE_STOP_REASON_CSA); 3386 sdata->deflink.csa_block_tx = false; 3387 } 3388 3389 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3390 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3391 ifmgd->reconnect); 3392 ifmgd->reconnect = false; 3393 } 3394 3395 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3396 struct wiphy_work *work) 3397 { 3398 struct ieee80211_sub_if_data *sdata = 3399 container_of(work, struct ieee80211_sub_if_data, 3400 u.mgd.beacon_connection_loss_work); 3401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3402 3403 if (ifmgd->connection_loss) { 3404 sdata_info(sdata, "Connection to AP %pM lost\n", 3405 sdata->vif.cfg.ap_addr); 3406 __ieee80211_disconnect(sdata); 3407 ifmgd->connection_loss = false; 3408 } else if (ifmgd->driver_disconnect) { 3409 sdata_info(sdata, 3410 "Driver requested disconnection from AP %pM\n", 3411 sdata->vif.cfg.ap_addr); 3412 __ieee80211_disconnect(sdata); 3413 ifmgd->driver_disconnect = false; 3414 } else { 3415 if (ifmgd->associated) 3416 sdata->deflink.u.mgd.beacon_loss_count++; 3417 ieee80211_mgd_probe_ap(sdata, true); 3418 } 3419 } 3420 3421 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3422 struct wiphy_work *work) 3423 { 3424 struct ieee80211_sub_if_data *sdata = 3425 container_of(work, struct ieee80211_sub_if_data, 3426 u.mgd.csa_connection_drop_work); 3427 3428 __ieee80211_disconnect(sdata); 3429 } 3430 3431 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3432 { 3433 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3434 struct ieee80211_hw *hw = &sdata->local->hw; 3435 3436 trace_api_beacon_loss(sdata); 3437 3438 sdata->u.mgd.connection_loss = false; 3439 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3440 } 3441 EXPORT_SYMBOL(ieee80211_beacon_loss); 3442 3443 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3444 { 3445 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3446 struct ieee80211_hw *hw = &sdata->local->hw; 3447 3448 trace_api_connection_loss(sdata); 3449 3450 sdata->u.mgd.connection_loss = true; 3451 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3452 } 3453 EXPORT_SYMBOL(ieee80211_connection_loss); 3454 3455 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3456 { 3457 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3458 struct ieee80211_hw *hw = &sdata->local->hw; 3459 3460 trace_api_disconnect(sdata, reconnect); 3461 3462 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3463 return; 3464 3465 sdata->u.mgd.driver_disconnect = true; 3466 sdata->u.mgd.reconnect = reconnect; 3467 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3468 } 3469 EXPORT_SYMBOL(ieee80211_disconnect); 3470 3471 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3472 bool assoc) 3473 { 3474 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3475 3476 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3477 3478 if (!assoc) { 3479 /* 3480 * we are not authenticated yet, the only timer that could be 3481 * running is the timeout for the authentication response which 3482 * which is not relevant anymore. 3483 */ 3484 del_timer_sync(&sdata->u.mgd.timer); 3485 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3486 3487 /* other links are destroyed */ 3488 sdata->deflink.u.mgd.conn_flags = 0; 3489 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3490 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3491 BSS_CHANGED_BSSID); 3492 sdata->u.mgd.flags = 0; 3493 3494 ieee80211_link_release_channel(&sdata->deflink); 3495 ieee80211_vif_set_links(sdata, 0, 0); 3496 } 3497 3498 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3499 kfree(auth_data); 3500 sdata->u.mgd.auth_data = NULL; 3501 } 3502 3503 enum assoc_status { 3504 ASSOC_SUCCESS, 3505 ASSOC_REJECTED, 3506 ASSOC_TIMEOUT, 3507 ASSOC_ABANDON, 3508 }; 3509 3510 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3511 enum assoc_status status) 3512 { 3513 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3514 3515 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3516 3517 if (status != ASSOC_SUCCESS) { 3518 /* 3519 * we are not associated yet, the only timer that could be 3520 * running is the timeout for the association response which 3521 * which is not relevant anymore. 3522 */ 3523 del_timer_sync(&sdata->u.mgd.timer); 3524 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3525 3526 sdata->deflink.u.mgd.conn_flags = 0; 3527 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3528 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3529 BSS_CHANGED_BSSID); 3530 sdata->u.mgd.flags = 0; 3531 sdata->vif.bss_conf.mu_mimo_owner = false; 3532 3533 if (status != ASSOC_REJECTED) { 3534 struct cfg80211_assoc_failure data = { 3535 .timeout = status == ASSOC_TIMEOUT, 3536 }; 3537 int i; 3538 3539 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3540 ARRAY_SIZE(assoc_data->link)); 3541 3542 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3543 data.bss[i] = assoc_data->link[i].bss; 3544 3545 if (ieee80211_vif_is_mld(&sdata->vif)) 3546 data.ap_mld_addr = assoc_data->ap_addr; 3547 3548 cfg80211_assoc_failure(sdata->dev, &data); 3549 } 3550 3551 ieee80211_link_release_channel(&sdata->deflink); 3552 ieee80211_vif_set_links(sdata, 0, 0); 3553 } 3554 3555 kfree(assoc_data); 3556 sdata->u.mgd.assoc_data = NULL; 3557 } 3558 3559 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3560 struct ieee80211_mgmt *mgmt, size_t len) 3561 { 3562 struct ieee80211_local *local = sdata->local; 3563 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3564 const struct element *challenge; 3565 u8 *pos; 3566 u32 tx_flags = 0; 3567 struct ieee80211_prep_tx_info info = { 3568 .subtype = IEEE80211_STYPE_AUTH, 3569 }; 3570 3571 pos = mgmt->u.auth.variable; 3572 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3573 len - (pos - (u8 *)mgmt)); 3574 if (!challenge) 3575 return; 3576 auth_data->expected_transaction = 4; 3577 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3578 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3579 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3580 IEEE80211_TX_INTFL_MLME_CONN_TX; 3581 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3582 (void *)challenge, 3583 challenge->datalen + sizeof(*challenge), 3584 auth_data->ap_addr, auth_data->ap_addr, 3585 auth_data->key, auth_data->key_len, 3586 auth_data->key_idx, tx_flags); 3587 } 3588 3589 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3590 { 3591 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3592 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3593 struct sta_info *sta; 3594 3595 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3596 3597 sdata_info(sdata, "authenticated\n"); 3598 ifmgd->auth_data->done = true; 3599 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3600 ifmgd->auth_data->timeout_started = true; 3601 run_again(sdata, ifmgd->auth_data->timeout); 3602 3603 /* move station state to auth */ 3604 sta = sta_info_get(sdata, ap_addr); 3605 if (!sta) { 3606 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3607 return false; 3608 } 3609 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3610 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3611 return false; 3612 } 3613 3614 return true; 3615 } 3616 3617 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3618 struct ieee80211_mgmt *mgmt, size_t len) 3619 { 3620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3621 u16 auth_alg, auth_transaction, status_code; 3622 struct ieee80211_event event = { 3623 .type = MLME_EVENT, 3624 .u.mlme.data = AUTH_EVENT, 3625 }; 3626 struct ieee80211_prep_tx_info info = { 3627 .subtype = IEEE80211_STYPE_AUTH, 3628 }; 3629 3630 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3631 3632 if (len < 24 + 6) 3633 return; 3634 3635 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3636 return; 3637 3638 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3639 return; 3640 3641 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3642 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3643 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3644 3645 if (auth_alg != ifmgd->auth_data->algorithm || 3646 (auth_alg != WLAN_AUTH_SAE && 3647 auth_transaction != ifmgd->auth_data->expected_transaction) || 3648 (auth_alg == WLAN_AUTH_SAE && 3649 (auth_transaction < ifmgd->auth_data->expected_transaction || 3650 auth_transaction > 2))) { 3651 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3652 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3653 auth_transaction, 3654 ifmgd->auth_data->expected_transaction); 3655 goto notify_driver; 3656 } 3657 3658 if (status_code != WLAN_STATUS_SUCCESS) { 3659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3660 3661 if (auth_alg == WLAN_AUTH_SAE && 3662 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3663 (auth_transaction == 1 && 3664 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3665 status_code == WLAN_STATUS_SAE_PK)))) { 3666 /* waiting for userspace now */ 3667 ifmgd->auth_data->waiting = true; 3668 ifmgd->auth_data->timeout = 3669 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3670 ifmgd->auth_data->timeout_started = true; 3671 run_again(sdata, ifmgd->auth_data->timeout); 3672 goto notify_driver; 3673 } 3674 3675 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3676 mgmt->sa, status_code); 3677 ieee80211_destroy_auth_data(sdata, false); 3678 event.u.mlme.status = MLME_DENIED; 3679 event.u.mlme.reason = status_code; 3680 drv_event_callback(sdata->local, sdata, &event); 3681 goto notify_driver; 3682 } 3683 3684 switch (ifmgd->auth_data->algorithm) { 3685 case WLAN_AUTH_OPEN: 3686 case WLAN_AUTH_LEAP: 3687 case WLAN_AUTH_FT: 3688 case WLAN_AUTH_SAE: 3689 case WLAN_AUTH_FILS_SK: 3690 case WLAN_AUTH_FILS_SK_PFS: 3691 case WLAN_AUTH_FILS_PK: 3692 break; 3693 case WLAN_AUTH_SHARED_KEY: 3694 if (ifmgd->auth_data->expected_transaction != 4) { 3695 ieee80211_auth_challenge(sdata, mgmt, len); 3696 /* need another frame */ 3697 return; 3698 } 3699 break; 3700 default: 3701 WARN_ONCE(1, "invalid auth alg %d", 3702 ifmgd->auth_data->algorithm); 3703 goto notify_driver; 3704 } 3705 3706 event.u.mlme.status = MLME_SUCCESS; 3707 info.success = 1; 3708 drv_event_callback(sdata->local, sdata, &event); 3709 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3710 (auth_transaction == 2 && 3711 ifmgd->auth_data->expected_transaction == 2)) { 3712 if (!ieee80211_mark_sta_auth(sdata)) 3713 return; /* ignore frame -- wait for timeout */ 3714 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3715 auth_transaction == 2) { 3716 sdata_info(sdata, "SAE peer confirmed\n"); 3717 ifmgd->auth_data->peer_confirmed = true; 3718 } 3719 3720 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3721 notify_driver: 3722 drv_mgd_complete_tx(sdata->local, sdata, &info); 3723 } 3724 3725 #define case_WLAN(type) \ 3726 case WLAN_REASON_##type: return #type 3727 3728 const char *ieee80211_get_reason_code_string(u16 reason_code) 3729 { 3730 switch (reason_code) { 3731 case_WLAN(UNSPECIFIED); 3732 case_WLAN(PREV_AUTH_NOT_VALID); 3733 case_WLAN(DEAUTH_LEAVING); 3734 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3735 case_WLAN(DISASSOC_AP_BUSY); 3736 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3737 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3738 case_WLAN(DISASSOC_STA_HAS_LEFT); 3739 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3740 case_WLAN(DISASSOC_BAD_POWER); 3741 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3742 case_WLAN(INVALID_IE); 3743 case_WLAN(MIC_FAILURE); 3744 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3745 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3746 case_WLAN(IE_DIFFERENT); 3747 case_WLAN(INVALID_GROUP_CIPHER); 3748 case_WLAN(INVALID_PAIRWISE_CIPHER); 3749 case_WLAN(INVALID_AKMP); 3750 case_WLAN(UNSUPP_RSN_VERSION); 3751 case_WLAN(INVALID_RSN_IE_CAP); 3752 case_WLAN(IEEE8021X_FAILED); 3753 case_WLAN(CIPHER_SUITE_REJECTED); 3754 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3755 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3756 case_WLAN(DISASSOC_LOW_ACK); 3757 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3758 case_WLAN(QSTA_LEAVE_QBSS); 3759 case_WLAN(QSTA_NOT_USE); 3760 case_WLAN(QSTA_REQUIRE_SETUP); 3761 case_WLAN(QSTA_TIMEOUT); 3762 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3763 case_WLAN(MESH_PEER_CANCELED); 3764 case_WLAN(MESH_MAX_PEERS); 3765 case_WLAN(MESH_CONFIG); 3766 case_WLAN(MESH_CLOSE); 3767 case_WLAN(MESH_MAX_RETRIES); 3768 case_WLAN(MESH_CONFIRM_TIMEOUT); 3769 case_WLAN(MESH_INVALID_GTK); 3770 case_WLAN(MESH_INCONSISTENT_PARAM); 3771 case_WLAN(MESH_INVALID_SECURITY); 3772 case_WLAN(MESH_PATH_ERROR); 3773 case_WLAN(MESH_PATH_NOFORWARD); 3774 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3775 case_WLAN(MAC_EXISTS_IN_MBSS); 3776 case_WLAN(MESH_CHAN_REGULATORY); 3777 case_WLAN(MESH_CHAN); 3778 default: return "<unknown>"; 3779 } 3780 } 3781 3782 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3783 struct ieee80211_mgmt *mgmt, size_t len) 3784 { 3785 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3786 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3787 3788 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3789 3790 if (len < 24 + 2) 3791 return; 3792 3793 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3794 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3795 return; 3796 } 3797 3798 if (ifmgd->associated && 3799 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3800 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3801 sdata->vif.cfg.ap_addr, reason_code, 3802 ieee80211_get_reason_code_string(reason_code)); 3803 3804 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3805 3806 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3807 reason_code, false); 3808 return; 3809 } 3810 3811 if (ifmgd->assoc_data && 3812 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3813 sdata_info(sdata, 3814 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3815 ifmgd->assoc_data->ap_addr, reason_code, 3816 ieee80211_get_reason_code_string(reason_code)); 3817 3818 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3819 3820 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3821 return; 3822 } 3823 } 3824 3825 3826 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3827 struct ieee80211_mgmt *mgmt, size_t len) 3828 { 3829 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3830 u16 reason_code; 3831 3832 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3833 3834 if (len < 24 + 2) 3835 return; 3836 3837 if (!ifmgd->associated || 3838 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3839 return; 3840 3841 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3842 3843 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3844 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3845 return; 3846 } 3847 3848 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3849 sdata->vif.cfg.ap_addr, reason_code, 3850 ieee80211_get_reason_code_string(reason_code)); 3851 3852 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3853 3854 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3855 false); 3856 } 3857 3858 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3859 u8 *supp_rates, unsigned int supp_rates_len, 3860 u32 *rates, u32 *basic_rates, 3861 bool *have_higher_than_11mbit, 3862 int *min_rate, int *min_rate_index) 3863 { 3864 int i, j; 3865 3866 for (i = 0; i < supp_rates_len; i++) { 3867 int rate = supp_rates[i] & 0x7f; 3868 bool is_basic = !!(supp_rates[i] & 0x80); 3869 3870 if ((rate * 5) > 110) 3871 *have_higher_than_11mbit = true; 3872 3873 /* 3874 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 3875 * selectors since they're not rates. 3876 * 3877 * Note: Even though the membership selector and the basic 3878 * rate flag share the same bit, they are not exactly 3879 * the same. 3880 */ 3881 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3882 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3883 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3884 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 3885 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3886 continue; 3887 3888 for (j = 0; j < sband->n_bitrates; j++) { 3889 struct ieee80211_rate *br; 3890 int brate; 3891 3892 br = &sband->bitrates[j]; 3893 3894 brate = DIV_ROUND_UP(br->bitrate, 5); 3895 if (brate == rate) { 3896 *rates |= BIT(j); 3897 if (is_basic) 3898 *basic_rates |= BIT(j); 3899 if ((rate * 5) < *min_rate) { 3900 *min_rate = rate * 5; 3901 *min_rate_index = j; 3902 } 3903 break; 3904 } 3905 } 3906 } 3907 } 3908 3909 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3910 struct ieee80211_supported_band *sband, 3911 const struct link_sta_info *link_sta, 3912 const struct ieee802_11_elems *elems) 3913 { 3914 const struct ieee80211_sta_he_cap *own_he_cap = 3915 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3916 3917 if (elems->ext_capab_len < 10) 3918 return false; 3919 3920 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3921 return false; 3922 3923 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3924 IEEE80211_HE_MAC_CAP0_TWT_RES && 3925 own_he_cap && 3926 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3927 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3928 } 3929 3930 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3931 struct ieee80211_supported_band *sband, 3932 struct ieee80211_link_data *link, 3933 struct link_sta_info *link_sta, 3934 struct ieee802_11_elems *elems) 3935 { 3936 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3937 3938 if (link->conf->twt_requester != twt) { 3939 link->conf->twt_requester = twt; 3940 return BSS_CHANGED_TWT; 3941 } 3942 return 0; 3943 } 3944 3945 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3946 struct ieee80211_bss_conf *bss_conf, 3947 struct ieee80211_supported_band *sband, 3948 struct link_sta_info *link_sta) 3949 { 3950 const struct ieee80211_sta_he_cap *own_he_cap = 3951 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3952 3953 return bss_conf->he_support && 3954 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3955 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3956 own_he_cap && 3957 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3958 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3959 } 3960 3961 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3962 struct link_sta_info *link_sta, 3963 struct cfg80211_bss *cbss, 3964 struct ieee80211_mgmt *mgmt, 3965 const u8 *elem_start, 3966 unsigned int elem_len, 3967 u64 *changed) 3968 { 3969 struct ieee80211_sub_if_data *sdata = link->sdata; 3970 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3971 struct ieee80211_bss_conf *bss_conf = link->conf; 3972 struct ieee80211_local *local = sdata->local; 3973 unsigned int link_id = link->link_id; 3974 struct ieee80211_elems_parse_params parse_params = { 3975 .start = elem_start, 3976 .len = elem_len, 3977 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 3978 .from_ap = true, 3979 }; 3980 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3981 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3982 const struct cfg80211_bss_ies *bss_ies = NULL; 3983 struct ieee80211_supported_band *sband; 3984 struct ieee802_11_elems *elems; 3985 const __le16 prof_bss_param_ch_present = 3986 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 3987 u16 capab_info; 3988 bool ret; 3989 3990 elems = ieee802_11_parse_elems_full(&parse_params); 3991 if (!elems) 3992 return false; 3993 3994 if (link_id == assoc_data->assoc_link_id) { 3995 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3996 3997 /* 3998 * we should not get to this flow unless the association was 3999 * successful, so set the status directly to success 4000 */ 4001 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4002 if (elems->ml_basic) { 4003 if (!(elems->ml_basic->control & 4004 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT))) { 4005 ret = false; 4006 goto out; 4007 } 4008 link->u.mgd.bss_param_ch_cnt = 4009 ieee80211_mle_get_bss_param_ch_cnt(elems->ml_basic); 4010 } 4011 } else if (!elems->prof || 4012 !(elems->prof->control & prof_bss_param_ch_present)) { 4013 ret = false; 4014 goto out; 4015 } else { 4016 const u8 *ptr = elems->prof->variable + 4017 elems->prof->sta_info_len - 1; 4018 4019 /* 4020 * During parsing, we validated that these fields exist, 4021 * otherwise elems->prof would have been set to NULL. 4022 */ 4023 capab_info = get_unaligned_le16(ptr); 4024 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4025 link->u.mgd.bss_param_ch_cnt = 4026 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4027 4028 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4029 link_info(link, "association response status code=%u\n", 4030 assoc_data->link[link_id].status); 4031 ret = true; 4032 goto out; 4033 } 4034 } 4035 4036 if (!is_s1g && !elems->supp_rates) { 4037 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4038 ret = false; 4039 goto out; 4040 } 4041 4042 link->u.mgd.tdls_chan_switch_prohibited = 4043 elems->ext_capab && elems->ext_capab_len >= 5 && 4044 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4045 4046 /* 4047 * Some APs are erroneously not including some information in their 4048 * (re)association response frames. Try to recover by using the data 4049 * from the beacon or probe response. This seems to afflict mobile 4050 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4051 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4052 */ 4053 if (!is_6ghz && 4054 ((assoc_data->wmm && !elems->wmm_param) || 4055 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4056 (!elems->ht_cap_elem || !elems->ht_operation)) || 4057 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4058 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4059 const struct cfg80211_bss_ies *ies; 4060 struct ieee802_11_elems *bss_elems; 4061 4062 rcu_read_lock(); 4063 ies = rcu_dereference(cbss->ies); 4064 if (ies) 4065 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4066 GFP_ATOMIC); 4067 rcu_read_unlock(); 4068 if (!bss_ies) { 4069 ret = false; 4070 goto out; 4071 } 4072 4073 parse_params.start = bss_ies->data; 4074 parse_params.len = bss_ies->len; 4075 parse_params.bss = cbss; 4076 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4077 if (!bss_elems) { 4078 ret = false; 4079 goto out; 4080 } 4081 4082 if (assoc_data->wmm && 4083 !elems->wmm_param && bss_elems->wmm_param) { 4084 elems->wmm_param = bss_elems->wmm_param; 4085 sdata_info(sdata, 4086 "AP bug: WMM param missing from AssocResp\n"); 4087 } 4088 4089 /* 4090 * Also check if we requested HT/VHT, otherwise the AP doesn't 4091 * have to include the IEs in the (re)association response. 4092 */ 4093 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4094 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4095 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4096 sdata_info(sdata, 4097 "AP bug: HT capability missing from AssocResp\n"); 4098 } 4099 if (!elems->ht_operation && bss_elems->ht_operation && 4100 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4101 elems->ht_operation = bss_elems->ht_operation; 4102 sdata_info(sdata, 4103 "AP bug: HT operation missing from AssocResp\n"); 4104 } 4105 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4106 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4107 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4108 sdata_info(sdata, 4109 "AP bug: VHT capa missing from AssocResp\n"); 4110 } 4111 if (!elems->vht_operation && bss_elems->vht_operation && 4112 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4113 elems->vht_operation = bss_elems->vht_operation; 4114 sdata_info(sdata, 4115 "AP bug: VHT operation missing from AssocResp\n"); 4116 } 4117 4118 kfree(bss_elems); 4119 } 4120 4121 /* 4122 * We previously checked these in the beacon/probe response, so 4123 * they should be present here. This is just a safety net. 4124 */ 4125 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4126 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4127 sdata_info(sdata, 4128 "HT AP is missing WMM params or HT capability/operation\n"); 4129 ret = false; 4130 goto out; 4131 } 4132 4133 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4134 (!elems->vht_cap_elem || !elems->vht_operation)) { 4135 sdata_info(sdata, 4136 "VHT AP is missing VHT capability/operation\n"); 4137 ret = false; 4138 goto out; 4139 } 4140 4141 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4142 !elems->he_6ghz_capa) { 4143 sdata_info(sdata, 4144 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4145 ret = false; 4146 goto out; 4147 } 4148 4149 if (WARN_ON(!link->conf->chandef.chan)) { 4150 ret = false; 4151 goto out; 4152 } 4153 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4154 4155 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4156 (!elems->he_cap || !elems->he_operation)) { 4157 sdata_info(sdata, 4158 "HE AP is missing HE capability/operation\n"); 4159 ret = false; 4160 goto out; 4161 } 4162 4163 /* Set up internal HT/VHT capabilities */ 4164 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4165 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4166 elems->ht_cap_elem, 4167 link_sta); 4168 4169 if (elems->vht_cap_elem && 4170 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4171 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4172 const struct cfg80211_bss_ies *ies; 4173 4174 /* 4175 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4176 * too large maximum MPDU length in the association response 4177 * (indicating 12k) that it cannot actually process ... 4178 * Work around that. 4179 */ 4180 rcu_read_lock(); 4181 ies = rcu_dereference(cbss->ies); 4182 if (ies) { 4183 const struct element *elem; 4184 4185 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4186 ies->data, ies->len); 4187 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4188 bss_vht_cap = (const void *)elem->data; 4189 } 4190 4191 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4192 elems->vht_cap_elem, 4193 bss_vht_cap, link_sta); 4194 rcu_read_unlock(); 4195 } 4196 4197 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4198 elems->he_cap) { 4199 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4200 elems->he_cap, 4201 elems->he_cap_len, 4202 elems->he_6ghz_capa, 4203 link_sta); 4204 4205 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4206 if (elems->rsnx && elems->rsnx_len && 4207 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4208 wiphy_ext_feature_isset(local->hw.wiphy, 4209 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4210 bss_conf->twt_protected = true; 4211 else 4212 bss_conf->twt_protected = false; 4213 4214 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4215 link_sta, elems); 4216 4217 if (elems->eht_operation && elems->eht_cap && 4218 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4219 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4220 elems->he_cap, 4221 elems->he_cap_len, 4222 elems->eht_cap, 4223 elems->eht_cap_len, 4224 link_sta); 4225 4226 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4227 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4228 } else { 4229 bss_conf->eht_support = false; 4230 } 4231 } else { 4232 bss_conf->he_support = false; 4233 bss_conf->twt_requester = false; 4234 bss_conf->twt_protected = false; 4235 bss_conf->eht_support = false; 4236 } 4237 4238 bss_conf->twt_broadcast = 4239 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4240 4241 if (bss_conf->he_support) { 4242 bss_conf->he_bss_color.color = 4243 le32_get_bits(elems->he_operation->he_oper_params, 4244 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4245 bss_conf->he_bss_color.partial = 4246 le32_get_bits(elems->he_operation->he_oper_params, 4247 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4248 bss_conf->he_bss_color.enabled = 4249 !le32_get_bits(elems->he_operation->he_oper_params, 4250 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4251 4252 if (bss_conf->he_bss_color.enabled) 4253 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4254 4255 bss_conf->htc_trig_based_pkt_ext = 4256 le32_get_bits(elems->he_operation->he_oper_params, 4257 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4258 bss_conf->frame_time_rts_th = 4259 le32_get_bits(elems->he_operation->he_oper_params, 4260 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4261 4262 bss_conf->uora_exists = !!elems->uora_element; 4263 if (elems->uora_element) 4264 bss_conf->uora_ocw_range = elems->uora_element[0]; 4265 4266 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4267 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4268 /* TODO: OPEN: what happens if BSS color disable is set? */ 4269 } 4270 4271 if (cbss->transmitted_bss) { 4272 bss_conf->nontransmitted = true; 4273 ether_addr_copy(bss_conf->transmitter_bssid, 4274 cbss->transmitted_bss->bssid); 4275 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4276 bss_conf->bssid_index = cbss->bssid_index; 4277 } 4278 4279 /* 4280 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4281 * in their association response, so ignore that data for our own 4282 * configuration. If it changed since the last beacon, we'll get the 4283 * next beacon and update then. 4284 */ 4285 4286 /* 4287 * If an operating mode notification IE is present, override the 4288 * NSS calculation (that would be done in rate_control_rate_init()) 4289 * and use the # of streams from that element. 4290 */ 4291 if (elems->opmode_notif && 4292 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4293 u8 nss; 4294 4295 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4296 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4297 nss += 1; 4298 link_sta->pub->rx_nss = nss; 4299 } 4300 4301 /* 4302 * Always handle WMM once after association regardless 4303 * of the first value the AP uses. Setting -1 here has 4304 * that effect because the AP values is an unsigned 4305 * 4-bit value. 4306 */ 4307 link->u.mgd.wmm_last_param_set = -1; 4308 link->u.mgd.mu_edca_last_param_set = -1; 4309 4310 if (link->u.mgd.disable_wmm_tracking) { 4311 ieee80211_set_wmm_default(link, false, false); 4312 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4313 elems->wmm_param_len, 4314 elems->mu_edca_param_set)) { 4315 /* still enable QoS since we might have HT/VHT */ 4316 ieee80211_set_wmm_default(link, false, true); 4317 /* disable WMM tracking in this case to disable 4318 * tracking WMM parameter changes in the beacon if 4319 * the parameters weren't actually valid. Doing so 4320 * avoids changing parameters very strangely when 4321 * the AP is going back and forth between valid and 4322 * invalid parameters. 4323 */ 4324 link->u.mgd.disable_wmm_tracking = true; 4325 } 4326 4327 if (elems->max_idle_period_ie) { 4328 bss_conf->max_idle_period = 4329 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4330 bss_conf->protected_keep_alive = 4331 !!(elems->max_idle_period_ie->idle_options & 4332 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4333 *changed |= BSS_CHANGED_KEEP_ALIVE; 4334 } else { 4335 bss_conf->max_idle_period = 0; 4336 bss_conf->protected_keep_alive = false; 4337 } 4338 4339 /* set assoc capability (AID was already set earlier), 4340 * ieee80211_set_associated() will tell the driver */ 4341 bss_conf->assoc_capability = capab_info; 4342 4343 ret = true; 4344 out: 4345 kfree(elems); 4346 kfree(bss_ies); 4347 return ret; 4348 } 4349 4350 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4351 struct sta_info *sta, 4352 struct link_sta_info *link_sta, 4353 struct cfg80211_bss *cbss) 4354 { 4355 struct ieee80211_sub_if_data *sdata = link->sdata; 4356 struct ieee80211_local *local = sdata->local; 4357 struct ieee80211_bss *bss = (void *)cbss->priv; 4358 u32 rates = 0, basic_rates = 0; 4359 bool have_higher_than_11mbit = false; 4360 int min_rate = INT_MAX, min_rate_index = -1; 4361 struct ieee80211_supported_band *sband; 4362 4363 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4364 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4365 4366 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4367 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4368 ieee80211_s1g_sta_rate_init(sta); 4369 return 0; 4370 } 4371 4372 sband = local->hw.wiphy->bands[cbss->channel->band]; 4373 4374 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4375 &rates, &basic_rates, &have_higher_than_11mbit, 4376 &min_rate, &min_rate_index); 4377 4378 /* 4379 * This used to be a workaround for basic rates missing 4380 * in the association response frame. Now that we no 4381 * longer use the basic rates from there, it probably 4382 * doesn't happen any more, but keep the workaround so 4383 * in case some *other* APs are buggy in different ways 4384 * we can connect -- with a warning. 4385 * Allow this workaround only in case the AP provided at least 4386 * one rate. 4387 */ 4388 if (min_rate_index < 0) { 4389 link_info(link, "No legacy rates in association response\n"); 4390 return -EINVAL; 4391 } else if (!basic_rates) { 4392 link_info(link, "No basic rates, using min rate instead\n"); 4393 basic_rates = BIT(min_rate_index); 4394 } 4395 4396 if (rates) 4397 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4398 else 4399 link_info(link, "No rates found, keeping mandatory only\n"); 4400 4401 link->conf->basic_rates = basic_rates; 4402 4403 /* cf. IEEE 802.11 9.2.12 */ 4404 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4405 have_higher_than_11mbit; 4406 4407 return 0; 4408 } 4409 4410 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4411 struct cfg80211_bss *cbss) 4412 { 4413 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4414 const struct element *ht_cap_elem, *vht_cap_elem; 4415 const struct cfg80211_bss_ies *ies; 4416 const struct ieee80211_ht_cap *ht_cap; 4417 const struct ieee80211_vht_cap *vht_cap; 4418 const struct ieee80211_he_cap_elem *he_cap; 4419 const struct element *he_cap_elem; 4420 u16 mcs_80_map, mcs_160_map; 4421 int i, mcs_nss_size; 4422 bool support_160; 4423 u8 chains = 1; 4424 4425 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4426 return chains; 4427 4428 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4429 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4430 ht_cap = (void *)ht_cap_elem->data; 4431 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4432 /* 4433 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4434 * "Tx Unequal Modulation Supported" fields. 4435 */ 4436 } 4437 4438 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4439 return chains; 4440 4441 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4442 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4443 u8 nss; 4444 u16 tx_mcs_map; 4445 4446 vht_cap = (void *)vht_cap_elem->data; 4447 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4448 for (nss = 8; nss > 0; nss--) { 4449 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4450 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4451 break; 4452 } 4453 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4454 chains = max(chains, nss); 4455 } 4456 4457 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4458 return chains; 4459 4460 ies = rcu_dereference(cbss->ies); 4461 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4462 ies->data, ies->len); 4463 4464 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4465 return chains; 4466 4467 /* skip one byte ext_tag_id */ 4468 he_cap = (void *)(he_cap_elem->data + 1); 4469 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4470 4471 /* invalid HE IE */ 4472 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4473 return chains; 4474 4475 /* mcs_nss is right after he_cap info */ 4476 he_mcs_nss_supp = (void *)(he_cap + 1); 4477 4478 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4479 4480 for (i = 7; i >= 0; i--) { 4481 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4482 4483 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4484 chains = max_t(u8, chains, i + 1); 4485 break; 4486 } 4487 } 4488 4489 support_160 = he_cap->phy_cap_info[0] & 4490 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4491 4492 if (!support_160) 4493 return chains; 4494 4495 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4496 for (i = 7; i >= 0; i--) { 4497 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4498 4499 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4500 chains = max_t(u8, chains, i + 1); 4501 break; 4502 } 4503 } 4504 4505 return chains; 4506 } 4507 4508 static bool 4509 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4510 const struct cfg80211_bss_ies *ies, 4511 const struct ieee80211_he_operation *he_op) 4512 { 4513 const struct element *he_cap_elem; 4514 const struct ieee80211_he_cap_elem *he_cap; 4515 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4516 u16 mcs_80_map_tx, mcs_80_map_rx; 4517 u16 ap_min_req_set; 4518 int mcs_nss_size; 4519 int nss; 4520 4521 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4522 ies->data, ies->len); 4523 4524 if (!he_cap_elem) 4525 return false; 4526 4527 /* invalid HE IE */ 4528 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4529 sdata_info(sdata, 4530 "Invalid HE elem, Disable HE\n"); 4531 return false; 4532 } 4533 4534 /* skip one byte ext_tag_id */ 4535 he_cap = (void *)(he_cap_elem->data + 1); 4536 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4537 4538 /* invalid HE IE */ 4539 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4540 sdata_info(sdata, 4541 "Invalid HE elem with nss size, Disable HE\n"); 4542 return false; 4543 } 4544 4545 /* mcs_nss is right after he_cap info */ 4546 he_mcs_nss_supp = (void *)(he_cap + 1); 4547 4548 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4549 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4550 4551 /* P802.11-REVme/D0.3 4552 * 27.1.1 Introduction to the HE PHY 4553 * ... 4554 * An HE STA shall support the following features: 4555 * ... 4556 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4557 * supported channel widths for HE SU PPDUs 4558 */ 4559 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4560 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4561 sdata_info(sdata, 4562 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4563 mcs_80_map_tx, mcs_80_map_rx); 4564 return false; 4565 } 4566 4567 if (!he_op) 4568 return true; 4569 4570 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4571 4572 /* 4573 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4574 * zeroes, which is nonsense, and completely inconsistent with itself 4575 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4576 */ 4577 if (!ap_min_req_set) 4578 return true; 4579 4580 /* make sure the AP is consistent with itself 4581 * 4582 * P802.11-REVme/D0.3 4583 * 26.17.1 Basic HE BSS operation 4584 * 4585 * A STA that is operating in an HE BSS shall be able to receive and 4586 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4587 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4588 * MLME-START.request primitive and shall be able to receive at each of 4589 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4590 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4591 * primitive 4592 */ 4593 for (nss = 8; nss > 0; nss--) { 4594 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4595 u8 ap_rx_val; 4596 u8 ap_tx_val; 4597 4598 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4599 continue; 4600 4601 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4602 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4603 4604 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4605 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4606 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4607 sdata_info(sdata, 4608 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4609 nss, ap_rx_val, ap_rx_val, ap_op_val); 4610 return false; 4611 } 4612 } 4613 4614 return true; 4615 } 4616 4617 static bool 4618 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4619 struct ieee80211_supported_band *sband, 4620 const struct ieee80211_he_operation *he_op) 4621 { 4622 const struct ieee80211_sta_he_cap *sta_he_cap = 4623 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4624 u16 ap_min_req_set; 4625 int i; 4626 4627 if (!sta_he_cap || !he_op) 4628 return false; 4629 4630 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4631 4632 /* 4633 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4634 * zeroes, which is nonsense, and completely inconsistent with itself 4635 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4636 */ 4637 if (!ap_min_req_set) 4638 return true; 4639 4640 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4641 for (i = 0; i < 3; i++) { 4642 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4643 &sta_he_cap->he_mcs_nss_supp; 4644 u16 sta_mcs_map_rx = 4645 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4646 u16 sta_mcs_map_tx = 4647 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4648 u8 nss; 4649 bool verified = true; 4650 4651 /* 4652 * For each band there is a maximum of 8 spatial streams 4653 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4654 * of 2 bits per NSS (1-8), with the values defined in enum 4655 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4656 * capabilities aren't less than the AP's minimum requirements 4657 * for this HE BSS per SS. 4658 * It is enough to find one such band that meets the reqs. 4659 */ 4660 for (nss = 8; nss > 0; nss--) { 4661 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4662 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4663 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4664 4665 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4666 continue; 4667 4668 /* 4669 * Make sure the HE AP doesn't require MCSs that aren't 4670 * supported by the client as required by spec 4671 * 4672 * P802.11-REVme/D0.3 4673 * 26.17.1 Basic HE BSS operation 4674 * 4675 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4676 * a BSS, unless it supports (i.e., is able to both transmit and 4677 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4678 * HE-MCS and NSS set. 4679 */ 4680 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4681 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4682 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4683 verified = false; 4684 break; 4685 } 4686 } 4687 4688 if (verified) 4689 return true; 4690 } 4691 4692 /* If here, STA doesn't meet AP's HE min requirements */ 4693 return false; 4694 } 4695 4696 static u8 4697 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 4698 const struct ieee80211_sta_eht_cap *sta_eht_cap, 4699 unsigned int idx, int bw) 4700 { 4701 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 4702 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 4703 4704 /* handle us being a 20 MHz-only EHT STA - with four values 4705 * for MCS 0-7, 8-9, 10-11, 12-13. 4706 */ 4707 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 4708 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 4709 4710 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 4711 if (idx > 0) 4712 idx--; 4713 4714 switch (bw) { 4715 case 0: 4716 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 4717 case 1: 4718 if (!(he_phy_cap0 & 4719 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 4720 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 4721 return 0xff; /* pass check */ 4722 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 4723 case 2: 4724 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 4725 return 0xff; /* pass check */ 4726 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 4727 } 4728 4729 WARN_ON(1); 4730 return 0; 4731 } 4732 4733 static bool 4734 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 4735 struct ieee80211_supported_band *sband, 4736 const struct ieee80211_eht_operation *eht_op) 4737 { 4738 const struct ieee80211_sta_he_cap *sta_he_cap = 4739 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4740 const struct ieee80211_sta_eht_cap *sta_eht_cap = 4741 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4742 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 4743 unsigned int i; 4744 4745 if (!sta_he_cap || !sta_eht_cap || !eht_op) 4746 return false; 4747 4748 req = &eht_op->basic_mcs_nss; 4749 4750 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 4751 u8 req_rx_nss, req_tx_nss; 4752 unsigned int bw; 4753 4754 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4755 IEEE80211_EHT_MCS_NSS_RX); 4756 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4757 IEEE80211_EHT_MCS_NSS_TX); 4758 4759 for (bw = 0; bw < 3; bw++) { 4760 u8 have, have_rx_nss, have_tx_nss; 4761 4762 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 4763 sta_eht_cap, 4764 i, bw); 4765 have_rx_nss = u8_get_bits(have, 4766 IEEE80211_EHT_MCS_NSS_RX); 4767 have_tx_nss = u8_get_bits(have, 4768 IEEE80211_EHT_MCS_NSS_TX); 4769 4770 if (req_rx_nss > have_rx_nss || 4771 req_tx_nss > have_tx_nss) 4772 return false; 4773 } 4774 } 4775 4776 return true; 4777 } 4778 4779 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4780 struct ieee80211_link_data *link, 4781 struct cfg80211_bss *cbss, 4782 bool mlo, 4783 ieee80211_conn_flags_t *conn_flags) 4784 { 4785 struct ieee80211_local *local = sdata->local; 4786 const struct ieee80211_ht_cap *ht_cap = NULL; 4787 const struct ieee80211_ht_operation *ht_oper = NULL; 4788 const struct ieee80211_vht_operation *vht_oper = NULL; 4789 const struct ieee80211_he_operation *he_oper = NULL; 4790 const struct ieee80211_eht_operation *eht_oper = NULL; 4791 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4792 struct ieee80211_supported_band *sband; 4793 struct cfg80211_chan_def chandef; 4794 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4795 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4796 bool supports_mlo = false; 4797 struct ieee80211_bss *bss = (void *)cbss->priv; 4798 struct ieee80211_elems_parse_params parse_params = { 4799 .link_id = -1, 4800 .from_ap = true, 4801 }; 4802 struct ieee802_11_elems *elems; 4803 const struct cfg80211_bss_ies *ies; 4804 int ret; 4805 u32 i; 4806 bool have_80mhz; 4807 4808 lockdep_assert_wiphy(local->hw.wiphy); 4809 4810 rcu_read_lock(); 4811 4812 ies = rcu_dereference(cbss->ies); 4813 parse_params.start = ies->data; 4814 parse_params.len = ies->len; 4815 elems = ieee802_11_parse_elems_full(&parse_params); 4816 if (!elems) { 4817 rcu_read_unlock(); 4818 return -ENOMEM; 4819 } 4820 4821 sband = local->hw.wiphy->bands[cbss->channel->band]; 4822 4823 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4824 IEEE80211_CONN_DISABLE_80P80MHZ | 4825 IEEE80211_CONN_DISABLE_160MHZ); 4826 4827 /* disable HT/VHT/HE if we don't support them */ 4828 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4829 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4830 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4831 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4832 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4833 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4834 } 4835 4836 if (!sband->vht_cap.vht_supported && is_5ghz) { 4837 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4838 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4839 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4840 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4841 } 4842 4843 if (!ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 4844 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4845 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4846 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4847 } 4848 4849 if (!ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) { 4850 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4851 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4852 } 4853 4854 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4855 ht_oper = elems->ht_operation; 4856 ht_cap = elems->ht_cap_elem; 4857 4858 if (!ht_cap) { 4859 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4860 ht_oper = NULL; 4861 } 4862 } 4863 4864 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4865 vht_oper = elems->vht_operation; 4866 if (vht_oper && !ht_oper) { 4867 vht_oper = NULL; 4868 sdata_info(sdata, 4869 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4870 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4871 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4872 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4873 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4874 } 4875 4876 if (!elems->vht_cap_elem) { 4877 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4878 vht_oper = NULL; 4879 } 4880 } 4881 4882 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4883 he_oper = elems->he_operation; 4884 4885 if (link && is_6ghz) { 4886 struct ieee80211_bss_conf *bss_conf; 4887 u8 j = 0; 4888 4889 bss_conf = link->conf; 4890 4891 if (elems->pwr_constr_elem) 4892 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4893 4894 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4895 ARRAY_SIZE(elems->tx_pwr_env)); 4896 4897 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4898 if (elems->tx_pwr_env_len[i] > 4899 sizeof(bss_conf->tx_pwr_env[j])) 4900 continue; 4901 4902 bss_conf->tx_pwr_env_num++; 4903 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4904 elems->tx_pwr_env_len[i]); 4905 j++; 4906 } 4907 } 4908 4909 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4910 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4911 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4912 IEEE80211_CONN_DISABLE_EHT; 4913 } 4914 4915 /* 4916 * EHT requires HE to be supported as well. Specifically for 6 GHz 4917 * channels, the operation channel information can only be deduced from 4918 * both the 6 GHz operation information (from the HE operation IE) and 4919 * EHT operation. 4920 */ 4921 if (!(*conn_flags & 4922 (IEEE80211_CONN_DISABLE_HE | 4923 IEEE80211_CONN_DISABLE_EHT)) && 4924 he_oper) { 4925 const struct cfg80211_bss_ies *cbss_ies; 4926 const struct element *eht_ml_elem; 4927 const u8 *eht_oper_ie; 4928 4929 cbss_ies = rcu_dereference(cbss->ies); 4930 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4931 cbss_ies->data, cbss_ies->len); 4932 if (eht_oper_ie && eht_oper_ie[1] >= 4933 1 + sizeof(struct ieee80211_eht_operation)) 4934 eht_oper = (void *)(eht_oper_ie + 3); 4935 else 4936 eht_oper = NULL; 4937 4938 if (!ieee80211_verify_sta_eht_mcs_support(sdata, sband, eht_oper)) 4939 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4940 4941 eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 4942 cbss_ies->data, cbss_ies->len); 4943 4944 /* data + 1 / datalen - 1 since it's an extended element */ 4945 if (!(*conn_flags & IEEE80211_CONN_DISABLE_EHT) && 4946 eht_ml_elem && 4947 ieee80211_mle_type_ok(eht_ml_elem->data + 1, 4948 IEEE80211_ML_CONTROL_TYPE_BASIC, 4949 eht_ml_elem->datalen - 1)) { 4950 supports_mlo = true; 4951 4952 sdata->vif.cfg.eml_cap = 4953 ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1); 4954 sdata->vif.cfg.eml_med_sync_delay = 4955 ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1); 4956 } 4957 } 4958 4959 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4960 have_80mhz = false; 4961 for (i = 0; i < sband->n_channels; i++) { 4962 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4963 IEEE80211_CHAN_NO_80MHZ)) 4964 continue; 4965 4966 have_80mhz = true; 4967 break; 4968 } 4969 4970 if (!have_80mhz) { 4971 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4972 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4973 } 4974 4975 if (sband->band == NL80211_BAND_S1GHZ) { 4976 s1g_oper = elems->s1g_oper; 4977 if (!s1g_oper) 4978 sdata_info(sdata, 4979 "AP missing S1G operation element?\n"); 4980 } 4981 4982 *conn_flags |= 4983 ieee80211_determine_chantype(sdata, link, *conn_flags, 4984 sband, 4985 cbss->channel, 4986 bss->vht_cap_info, 4987 ht_oper, vht_oper, 4988 he_oper, eht_oper, 4989 s1g_oper, 4990 &chandef, false); 4991 4992 if (link) 4993 link->needed_rx_chains = 4994 min(ieee80211_max_rx_chains(link, cbss), 4995 local->rx_chains); 4996 4997 rcu_read_unlock(); 4998 /* the element data was RCU protected so no longer valid anyway */ 4999 kfree(elems); 5000 elems = NULL; 5001 5002 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 5003 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5004 return -EINVAL; 5005 } 5006 5007 if (mlo && !supports_mlo) { 5008 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5009 return -EINVAL; 5010 } 5011 5012 if (!link) 5013 return 0; 5014 5015 /* will change later if needed */ 5016 link->smps_mode = IEEE80211_SMPS_OFF; 5017 5018 /* 5019 * If this fails (possibly due to channel context sharing 5020 * on incompatible channels, e.g. 80+80 and 160 sharing the 5021 * same control channel) try to use a smaller bandwidth. 5022 */ 5023 ret = ieee80211_link_use_channel(link, &chandef, 5024 IEEE80211_CHANCTX_SHARED); 5025 5026 /* don't downgrade for 5 and 10 MHz channels, though. */ 5027 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5028 chandef.width == NL80211_CHAN_WIDTH_10) 5029 goto out; 5030 5031 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5032 *conn_flags |= 5033 ieee80211_chandef_downgrade(&chandef); 5034 ret = ieee80211_link_use_channel(link, &chandef, 5035 IEEE80211_CHANCTX_SHARED); 5036 } 5037 out: 5038 return ret; 5039 } 5040 5041 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5042 u8 *dtim_count, u8 *dtim_period) 5043 { 5044 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5045 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5046 ies->len); 5047 const struct ieee80211_tim_ie *tim = NULL; 5048 const struct ieee80211_bssid_index *idx; 5049 bool valid = tim_ie && tim_ie[1] >= 2; 5050 5051 if (valid) 5052 tim = (void *)(tim_ie + 2); 5053 5054 if (dtim_count) 5055 *dtim_count = valid ? tim->dtim_count : 0; 5056 5057 if (dtim_period) 5058 *dtim_period = valid ? tim->dtim_period : 0; 5059 5060 /* Check if value is overridden by non-transmitted profile */ 5061 if (!idx_ie || idx_ie[1] < 3) 5062 return valid; 5063 5064 idx = (void *)(idx_ie + 2); 5065 5066 if (dtim_count) 5067 *dtim_count = idx->dtim_count; 5068 5069 if (dtim_period) 5070 *dtim_period = idx->dtim_period; 5071 5072 return true; 5073 } 5074 5075 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5076 struct ieee80211_mgmt *mgmt, 5077 struct ieee802_11_elems *elems, 5078 const u8 *elem_start, unsigned int elem_len) 5079 { 5080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5081 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5082 struct ieee80211_local *local = sdata->local; 5083 unsigned int link_id; 5084 struct sta_info *sta; 5085 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5086 u16 valid_links = 0, dormant_links = 0; 5087 int err; 5088 5089 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5090 /* 5091 * station info was already allocated and inserted before 5092 * the association and should be available to us 5093 */ 5094 sta = sta_info_get(sdata, assoc_data->ap_addr); 5095 if (WARN_ON(!sta)) 5096 goto out_err; 5097 5098 if (ieee80211_vif_is_mld(&sdata->vif)) { 5099 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5100 if (!assoc_data->link[link_id].bss) 5101 continue; 5102 5103 valid_links |= BIT(link_id); 5104 if (assoc_data->link[link_id].disabled) 5105 dormant_links |= BIT(link_id); 5106 5107 if (link_id != assoc_data->assoc_link_id) { 5108 err = ieee80211_sta_allocate_link(sta, link_id); 5109 if (err) 5110 goto out_err; 5111 } 5112 } 5113 5114 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5115 } 5116 5117 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5118 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5119 struct ieee80211_link_data *link; 5120 struct link_sta_info *link_sta; 5121 5122 if (!cbss) 5123 continue; 5124 5125 link = sdata_dereference(sdata->link[link_id], sdata); 5126 if (WARN_ON(!link)) 5127 goto out_err; 5128 5129 if (ieee80211_vif_is_mld(&sdata->vif)) 5130 link_info(link, 5131 "local address %pM, AP link address %pM%s\n", 5132 link->conf->addr, 5133 assoc_data->link[link_id].bss->bssid, 5134 link_id == assoc_data->assoc_link_id ? 5135 " (assoc)" : ""); 5136 5137 link_sta = rcu_dereference_protected(sta->link[link_id], 5138 lockdep_is_held(&local->hw.wiphy->mtx)); 5139 if (WARN_ON(!link_sta)) 5140 goto out_err; 5141 5142 if (!link->u.mgd.have_beacon) { 5143 const struct cfg80211_bss_ies *ies; 5144 5145 rcu_read_lock(); 5146 ies = rcu_dereference(cbss->beacon_ies); 5147 if (ies) 5148 link->u.mgd.have_beacon = true; 5149 else 5150 ies = rcu_dereference(cbss->ies); 5151 ieee80211_get_dtim(ies, 5152 &link->conf->sync_dtim_count, 5153 &link->u.mgd.dtim_period); 5154 link->conf->beacon_int = cbss->beacon_interval; 5155 rcu_read_unlock(); 5156 } 5157 5158 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5159 5160 if (link_id != assoc_data->assoc_link_id) { 5161 err = ieee80211_prep_channel(sdata, link, cbss, true, 5162 &link->u.mgd.conn_flags); 5163 if (err) { 5164 link_info(link, "prep_channel failed\n"); 5165 goto out_err; 5166 } 5167 } 5168 5169 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5170 assoc_data->link[link_id].bss); 5171 if (err) 5172 goto out_err; 5173 5174 if (!ieee80211_assoc_config_link(link, link_sta, 5175 assoc_data->link[link_id].bss, 5176 mgmt, elem_start, elem_len, 5177 &changed[link_id])) 5178 goto out_err; 5179 5180 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5181 valid_links &= ~BIT(link_id); 5182 ieee80211_sta_remove_link(sta, link_id); 5183 continue; 5184 } 5185 5186 if (link_id != assoc_data->assoc_link_id) { 5187 err = ieee80211_sta_activate_link(sta, link_id); 5188 if (err) 5189 goto out_err; 5190 } 5191 } 5192 5193 /* links might have changed due to rejected ones, set them again */ 5194 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5195 5196 rate_control_rate_init(sta); 5197 5198 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5199 set_sta_flag(sta, WLAN_STA_MFP); 5200 sta->sta.mfp = true; 5201 } else { 5202 sta->sta.mfp = false; 5203 } 5204 5205 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5206 elems->ext_capab_len); 5207 5208 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5209 local->hw.queues >= IEEE80211_NUM_ACS; 5210 5211 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5212 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5213 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5214 if (err) { 5215 sdata_info(sdata, 5216 "failed to move station %pM to desired state\n", 5217 sta->sta.addr); 5218 WARN_ON(__sta_info_destroy(sta)); 5219 goto out_err; 5220 } 5221 5222 if (sdata->wdev.use_4addr) 5223 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5224 5225 ieee80211_set_associated(sdata, assoc_data, changed); 5226 5227 /* 5228 * If we're using 4-addr mode, let the AP know that we're 5229 * doing so, so that it can create the STA VLAN on its side 5230 */ 5231 if (ifmgd->use_4addr) 5232 ieee80211_send_4addr_nullfunc(local, sdata); 5233 5234 /* 5235 * Start timer to probe the connection to the AP now. 5236 * Also start the timer that will detect beacon loss. 5237 */ 5238 ieee80211_sta_reset_beacon_monitor(sdata); 5239 ieee80211_sta_reset_conn_monitor(sdata); 5240 5241 return true; 5242 out_err: 5243 eth_zero_addr(sdata->vif.cfg.ap_addr); 5244 return false; 5245 } 5246 5247 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5248 struct ieee80211_mgmt *mgmt, 5249 size_t len) 5250 { 5251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5252 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5253 u16 capab_info, status_code, aid; 5254 struct ieee80211_elems_parse_params parse_params = { 5255 .bss = NULL, 5256 .link_id = -1, 5257 .from_ap = true, 5258 }; 5259 struct ieee802_11_elems *elems; 5260 int ac; 5261 const u8 *elem_start; 5262 unsigned int elem_len; 5263 bool reassoc; 5264 struct ieee80211_event event = { 5265 .type = MLME_EVENT, 5266 .u.mlme.data = ASSOC_EVENT, 5267 }; 5268 struct ieee80211_prep_tx_info info = {}; 5269 struct cfg80211_rx_assoc_resp resp = { 5270 .uapsd_queues = -1, 5271 }; 5272 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5273 unsigned int link_id; 5274 5275 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5276 5277 if (!assoc_data) 5278 return; 5279 5280 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5281 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5282 return; 5283 5284 /* 5285 * AssocResp and ReassocResp have identical structure, so process both 5286 * of them in this function. 5287 */ 5288 5289 if (len < 24 + 6) 5290 return; 5291 5292 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5293 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5294 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5295 if (assoc_data->s1g) 5296 elem_start = mgmt->u.s1g_assoc_resp.variable; 5297 else 5298 elem_start = mgmt->u.assoc_resp.variable; 5299 5300 /* 5301 * Note: this may not be perfect, AP might misbehave - if 5302 * anyone needs to rely on perfect complete notification 5303 * with the exact right subtype, then we need to track what 5304 * we actually transmitted. 5305 */ 5306 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5307 IEEE80211_STYPE_ASSOC_REQ; 5308 5309 if (assoc_data->fils_kek_len && 5310 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5311 return; 5312 5313 elem_len = len - (elem_start - (u8 *)mgmt); 5314 parse_params.start = elem_start; 5315 parse_params.len = elem_len; 5316 elems = ieee802_11_parse_elems_full(&parse_params); 5317 if (!elems) 5318 goto notify_driver; 5319 5320 if (elems->aid_resp) 5321 aid = le16_to_cpu(elems->aid_resp->aid); 5322 else if (assoc_data->s1g) 5323 aid = 0; /* TODO */ 5324 else 5325 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5326 5327 /* 5328 * The 5 MSB of the AID field are reserved 5329 * (802.11-2016 9.4.1.8 AID field) 5330 */ 5331 aid &= 0x7ff; 5332 5333 sdata_info(sdata, 5334 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5335 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5336 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5337 5338 ifmgd->broken_ap = false; 5339 5340 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5341 elems->timeout_int && 5342 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5343 u32 tu, ms; 5344 5345 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5346 le32_to_cpu(elems->timeout_int->value)); 5347 5348 tu = le32_to_cpu(elems->timeout_int->value); 5349 ms = tu * 1024 / 1000; 5350 sdata_info(sdata, 5351 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5352 assoc_data->ap_addr, tu, ms); 5353 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5354 assoc_data->timeout_started = true; 5355 if (ms > IEEE80211_ASSOC_TIMEOUT) 5356 run_again(sdata, assoc_data->timeout); 5357 goto notify_driver; 5358 } 5359 5360 if (status_code != WLAN_STATUS_SUCCESS) { 5361 sdata_info(sdata, "%pM denied association (code=%d)\n", 5362 assoc_data->ap_addr, status_code); 5363 event.u.mlme.status = MLME_DENIED; 5364 event.u.mlme.reason = status_code; 5365 drv_event_callback(sdata->local, sdata, &event); 5366 } else { 5367 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5368 sdata_info(sdata, 5369 "invalid AID value %d (out of range), turn off PS\n", 5370 aid); 5371 aid = 0; 5372 ifmgd->broken_ap = true; 5373 } 5374 5375 if (ieee80211_vif_is_mld(&sdata->vif)) { 5376 if (!elems->ml_basic) { 5377 sdata_info(sdata, 5378 "MLO association with %pM but no multi-link element in response!\n", 5379 assoc_data->ap_addr); 5380 goto abandon_assoc; 5381 } 5382 5383 if (le16_get_bits(elems->ml_basic->control, 5384 IEEE80211_ML_CONTROL_TYPE) != 5385 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5386 sdata_info(sdata, 5387 "bad multi-link element (control=0x%x)\n", 5388 le16_to_cpu(elems->ml_basic->control)); 5389 goto abandon_assoc; 5390 } else { 5391 struct ieee80211_mle_basic_common_info *common; 5392 5393 common = (void *)elems->ml_basic->variable; 5394 5395 if (memcmp(assoc_data->ap_addr, 5396 common->mld_mac_addr, ETH_ALEN)) { 5397 sdata_info(sdata, 5398 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5399 common->mld_mac_addr, 5400 assoc_data->ap_addr); 5401 goto abandon_assoc; 5402 } 5403 } 5404 } 5405 5406 sdata->vif.cfg.aid = aid; 5407 5408 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5409 elem_start, elem_len)) { 5410 /* oops -- internal error -- send timeout for now */ 5411 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5412 goto notify_driver; 5413 } 5414 event.u.mlme.status = MLME_SUCCESS; 5415 drv_event_callback(sdata->local, sdata, &event); 5416 sdata_info(sdata, "associated\n"); 5417 5418 info.success = 1; 5419 } 5420 5421 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5422 struct ieee80211_link_data *link; 5423 5424 if (!assoc_data->link[link_id].bss) 5425 continue; 5426 5427 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5428 ether_addr_copy(resp.links[link_id].addr, 5429 assoc_data->link[link_id].addr); 5430 resp.links[link_id].status = assoc_data->link[link_id].status; 5431 5432 link = sdata_dereference(sdata->link[link_id], sdata); 5433 if (!link) 5434 continue; 5435 5436 /* get uapsd queues configuration - same for all links */ 5437 resp.uapsd_queues = 0; 5438 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5439 if (link->tx_conf[ac].uapsd) 5440 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5441 } 5442 5443 if (ieee80211_vif_is_mld(&sdata->vif)) { 5444 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5445 resp.ap_mld_addr = ap_mld_addr; 5446 } 5447 5448 ieee80211_destroy_assoc_data(sdata, 5449 status_code == WLAN_STATUS_SUCCESS ? 5450 ASSOC_SUCCESS : 5451 ASSOC_REJECTED); 5452 5453 resp.buf = (u8 *)mgmt; 5454 resp.len = len; 5455 resp.req_ies = ifmgd->assoc_req_ies; 5456 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5457 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5458 notify_driver: 5459 drv_mgd_complete_tx(sdata->local, sdata, &info); 5460 kfree(elems); 5461 return; 5462 abandon_assoc: 5463 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5464 goto notify_driver; 5465 } 5466 5467 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5468 struct ieee80211_mgmt *mgmt, size_t len, 5469 struct ieee80211_rx_status *rx_status) 5470 { 5471 struct ieee80211_sub_if_data *sdata = link->sdata; 5472 struct ieee80211_local *local = sdata->local; 5473 struct ieee80211_bss *bss; 5474 struct ieee80211_channel *channel; 5475 5476 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5477 5478 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5479 ieee80211_rx_status_to_khz(rx_status)); 5480 if (!channel) 5481 return; 5482 5483 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5484 if (bss) { 5485 link->conf->beacon_rate = bss->beacon_rate; 5486 ieee80211_rx_bss_put(local, bss); 5487 } 5488 } 5489 5490 5491 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5492 struct sk_buff *skb) 5493 { 5494 struct ieee80211_sub_if_data *sdata = link->sdata; 5495 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5496 struct ieee80211_if_managed *ifmgd; 5497 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5498 struct ieee80211_channel *channel; 5499 size_t baselen, len = skb->len; 5500 5501 ifmgd = &sdata->u.mgd; 5502 5503 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5504 5505 /* 5506 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5507 * "If a 6 GHz AP receives a Probe Request frame and responds with 5508 * a Probe Response frame [..], the Address 1 field of the Probe 5509 * Response frame shall be set to the broadcast address [..]" 5510 * So, on 6GHz band we should also accept broadcast responses. 5511 */ 5512 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5513 rx_status->freq); 5514 if (!channel) 5515 return; 5516 5517 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5518 (channel->band != NL80211_BAND_6GHZ || 5519 !is_broadcast_ether_addr(mgmt->da))) 5520 return; /* ignore ProbeResp to foreign address */ 5521 5522 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5523 if (baselen > len) 5524 return; 5525 5526 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5527 5528 if (ifmgd->associated && 5529 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5530 ieee80211_reset_ap_probe(sdata); 5531 } 5532 5533 /* 5534 * This is the canonical list of information elements we care about, 5535 * the filter code also gives us all changes to the Microsoft OUI 5536 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5537 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5538 * changes to requested client power. 5539 * 5540 * We implement beacon filtering in software since that means we can 5541 * avoid processing the frame here and in cfg80211, and userspace 5542 * will not be able to tell whether the hardware supports it or not. 5543 * 5544 * XXX: This list needs to be dynamic -- userspace needs to be able to 5545 * add items it requires. It also needs to be able to tell us to 5546 * look out for other vendor IEs. 5547 */ 5548 static const u64 care_about_ies = 5549 (1ULL << WLAN_EID_COUNTRY) | 5550 (1ULL << WLAN_EID_ERP_INFO) | 5551 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5552 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5553 (1ULL << WLAN_EID_HT_CAPABILITY) | 5554 (1ULL << WLAN_EID_HT_OPERATION) | 5555 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5556 5557 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5558 struct ieee80211_if_managed *ifmgd, 5559 struct ieee80211_bss_conf *bss_conf, 5560 struct ieee80211_local *local, 5561 struct ieee80211_rx_status *rx_status) 5562 { 5563 struct ieee80211_sub_if_data *sdata = link->sdata; 5564 5565 /* Track average RSSI from the Beacon frames of the current AP */ 5566 5567 if (!link->u.mgd.tracking_signal_avg) { 5568 link->u.mgd.tracking_signal_avg = true; 5569 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5570 link->u.mgd.last_cqm_event_signal = 0; 5571 link->u.mgd.count_beacon_signal = 1; 5572 link->u.mgd.last_ave_beacon_signal = 0; 5573 } else { 5574 link->u.mgd.count_beacon_signal++; 5575 } 5576 5577 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5578 -rx_status->signal); 5579 5580 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5581 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5582 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5583 int last_sig = link->u.mgd.last_ave_beacon_signal; 5584 struct ieee80211_event event = { 5585 .type = RSSI_EVENT, 5586 }; 5587 5588 /* 5589 * if signal crosses either of the boundaries, invoke callback 5590 * with appropriate parameters 5591 */ 5592 if (sig > ifmgd->rssi_max_thold && 5593 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5594 link->u.mgd.last_ave_beacon_signal = sig; 5595 event.u.rssi.data = RSSI_EVENT_HIGH; 5596 drv_event_callback(local, sdata, &event); 5597 } else if (sig < ifmgd->rssi_min_thold && 5598 (last_sig >= ifmgd->rssi_max_thold || 5599 last_sig == 0)) { 5600 link->u.mgd.last_ave_beacon_signal = sig; 5601 event.u.rssi.data = RSSI_EVENT_LOW; 5602 drv_event_callback(local, sdata, &event); 5603 } 5604 } 5605 5606 if (bss_conf->cqm_rssi_thold && 5607 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5608 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5609 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5610 int last_event = link->u.mgd.last_cqm_event_signal; 5611 int thold = bss_conf->cqm_rssi_thold; 5612 int hyst = bss_conf->cqm_rssi_hyst; 5613 5614 if (sig < thold && 5615 (last_event == 0 || sig < last_event - hyst)) { 5616 link->u.mgd.last_cqm_event_signal = sig; 5617 ieee80211_cqm_rssi_notify( 5618 &sdata->vif, 5619 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5620 sig, GFP_KERNEL); 5621 } else if (sig > thold && 5622 (last_event == 0 || sig > last_event + hyst)) { 5623 link->u.mgd.last_cqm_event_signal = sig; 5624 ieee80211_cqm_rssi_notify( 5625 &sdata->vif, 5626 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5627 sig, GFP_KERNEL); 5628 } 5629 } 5630 5631 if (bss_conf->cqm_rssi_low && 5632 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5633 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5634 int last_event = link->u.mgd.last_cqm_event_signal; 5635 int low = bss_conf->cqm_rssi_low; 5636 int high = bss_conf->cqm_rssi_high; 5637 5638 if (sig < low && 5639 (last_event == 0 || last_event >= low)) { 5640 link->u.mgd.last_cqm_event_signal = sig; 5641 ieee80211_cqm_rssi_notify( 5642 &sdata->vif, 5643 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5644 sig, GFP_KERNEL); 5645 } else if (sig > high && 5646 (last_event == 0 || last_event <= high)) { 5647 link->u.mgd.last_cqm_event_signal = sig; 5648 ieee80211_cqm_rssi_notify( 5649 &sdata->vif, 5650 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5651 sig, GFP_KERNEL); 5652 } 5653 } 5654 } 5655 5656 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5657 struct cfg80211_bss *bss) 5658 { 5659 if (ether_addr_equal(tx_bssid, bss->bssid)) 5660 return true; 5661 if (!bss->transmitted_bss) 5662 return false; 5663 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5664 } 5665 5666 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5667 const struct ieee80211_eht_operation *eht_oper, 5668 u64 *changed) 5669 { 5670 u16 bitmap = 0, extracted; 5671 5672 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5673 (eht_oper->params & 5674 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5675 const struct ieee80211_eht_operation_info *info = 5676 (void *)eht_oper->optional; 5677 const u8 *disable_subchannel_bitmap = info->optional; 5678 5679 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5680 } 5681 5682 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5683 &link->conf->chandef, 5684 bitmap); 5685 5686 /* accept if there are no changes */ 5687 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5688 extracted == link->conf->eht_puncturing) 5689 return true; 5690 5691 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5692 &link->conf->chandef)) { 5693 link_info(link, 5694 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5695 link->u.mgd.bssid, 5696 bitmap, 5697 link->conf->chandef.width); 5698 return false; 5699 } 5700 5701 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5702 return true; 5703 } 5704 5705 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5706 struct wiphy_work *work) 5707 { 5708 struct ieee80211_sub_if_data *sdata = 5709 container_of(work, struct ieee80211_sub_if_data, 5710 u.mgd.ml_reconf_work.work); 5711 u16 new_valid_links, new_active_links, new_dormant_links; 5712 int ret; 5713 5714 if (!sdata->u.mgd.removed_links) 5715 return; 5716 5717 sdata_info(sdata, 5718 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5719 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5720 5721 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5722 if (new_valid_links == sdata->vif.valid_links) 5723 return; 5724 5725 if (!new_valid_links || 5726 !(new_valid_links & ~sdata->vif.dormant_links)) { 5727 sdata_info(sdata, "No valid links after reconfiguration\n"); 5728 ret = -EINVAL; 5729 goto out; 5730 } 5731 5732 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5733 if (new_active_links != sdata->vif.active_links) { 5734 if (!new_active_links) 5735 new_active_links = 5736 BIT(ffs(new_valid_links & 5737 ~sdata->vif.dormant_links) - 1); 5738 5739 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 5740 if (ret) { 5741 sdata_info(sdata, 5742 "Failed setting active links\n"); 5743 goto out; 5744 } 5745 } 5746 5747 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 5748 5749 ret = ieee80211_vif_set_links(sdata, new_valid_links, 5750 new_dormant_links); 5751 if (ret) 5752 sdata_info(sdata, "Failed setting valid links\n"); 5753 5754 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 5755 5756 out: 5757 if (!ret) 5758 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5759 else 5760 __ieee80211_disconnect(sdata); 5761 5762 sdata->u.mgd.removed_links = 0; 5763 } 5764 5765 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5766 struct ieee802_11_elems *elems) 5767 { 5768 const struct ieee80211_multi_link_elem *ml; 5769 const struct element *sub; 5770 size_t ml_len; 5771 unsigned long removed_links = 0; 5772 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5773 u8 link_id; 5774 u32 delay; 5775 5776 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5777 return; 5778 5779 ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, 5780 elems->ie_start, 5781 elems->total_len, 5782 elems->scratch_pos, 5783 elems->scratch + elems->scratch_len - 5784 elems->scratch_pos, 5785 WLAN_EID_FRAGMENT); 5786 5787 elems->ml_reconf = (const void *)elems->scratch_pos; 5788 elems->ml_reconf_len = ml_len; 5789 ml = elems->ml_reconf; 5790 5791 /* Directly parse the sub elements as the common information doesn't 5792 * hold any useful information. 5793 */ 5794 for_each_mle_subelement(sub, (u8 *)ml, ml_len) { 5795 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 5796 u8 *pos = prof->variable; 5797 u16 control; 5798 5799 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 5800 continue; 5801 5802 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 5803 sub->datalen)) 5804 return; 5805 5806 control = le16_to_cpu(prof->control); 5807 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 5808 5809 removed_links |= BIT(link_id); 5810 5811 /* the MAC address should not be included, but handle it */ 5812 if (control & 5813 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 5814 pos += 6; 5815 5816 /* According to Draft P802.11be_D3.0, the control should 5817 * include the AP Removal Timer present. If the AP Removal Timer 5818 * is not present assume immediate removal. 5819 */ 5820 if (control & 5821 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 5822 link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos); 5823 } 5824 5825 removed_links &= sdata->vif.valid_links; 5826 if (!removed_links) { 5827 /* In case the removal was cancelled, abort it */ 5828 if (sdata->u.mgd.removed_links) { 5829 sdata->u.mgd.removed_links = 0; 5830 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5831 &sdata->u.mgd.ml_reconf_work); 5832 } 5833 return; 5834 } 5835 5836 delay = 0; 5837 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 5838 struct ieee80211_bss_conf *link_conf = 5839 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 5840 u32 link_delay; 5841 5842 if (!link_conf) { 5843 removed_links &= ~BIT(link_id); 5844 continue; 5845 } 5846 5847 link_delay = link_conf->beacon_int * 5848 link_removal_timeout[link_id]; 5849 5850 if (!delay) 5851 delay = link_delay; 5852 else 5853 delay = min(delay, link_delay); 5854 } 5855 5856 sdata->u.mgd.removed_links = removed_links; 5857 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 5858 &sdata->u.mgd.ml_reconf_work, 5859 TU_TO_JIFFIES(delay)); 5860 } 5861 5862 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 5863 struct wiphy_work *work) 5864 { 5865 u16 new_active_links, new_dormant_links; 5866 struct ieee80211_sub_if_data *sdata = 5867 container_of(work, struct ieee80211_sub_if_data, 5868 u.mgd.ttlm_work.work); 5869 int ret; 5870 5871 new_active_links = sdata->u.mgd.ttlm_info.map & 5872 sdata->vif.valid_links; 5873 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 5874 sdata->vif.valid_links; 5875 if (!new_active_links) { 5876 ieee80211_disconnect(&sdata->vif, false); 5877 return; 5878 } 5879 5880 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 5881 new_active_links = BIT(ffs(new_active_links) - 1); 5882 ieee80211_set_active_links(&sdata->vif, new_active_links); 5883 5884 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 5885 new_dormant_links); 5886 5887 sdata->u.mgd.ttlm_info.active = true; 5888 sdata->u.mgd.ttlm_info.switch_time = 0; 5889 5890 if (!ret) 5891 ieee80211_vif_cfg_change_notify(sdata, 5892 BSS_CHANGED_MLD_VALID_LINKS); 5893 } 5894 5895 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 5896 { 5897 if (bm_size == 1) 5898 return *data; 5899 else 5900 return get_unaligned_le16(data); 5901 } 5902 5903 static int 5904 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 5905 const struct ieee80211_ttlm_elem *ttlm, 5906 struct ieee80211_adv_ttlm_info *ttlm_info) 5907 { 5908 /* The element size was already validated in 5909 * ieee80211_tid_to_link_map_size_ok() 5910 */ 5911 u8 control, link_map_presence, map_size, tid; 5912 u8 *pos; 5913 5914 memset(ttlm_info, 0, sizeof(*ttlm_info)); 5915 pos = (void *)ttlm->optional; 5916 control = ttlm->control; 5917 5918 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 5919 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 5920 return 0; 5921 5922 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 5923 IEEE80211_TTLM_DIRECTION_BOTH) { 5924 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 5925 return -EINVAL; 5926 } 5927 5928 link_map_presence = *pos; 5929 pos++; 5930 5931 ttlm_info->switch_time = get_unaligned_le16(pos); 5932 pos += 2; 5933 5934 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 5935 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 5936 pos += 3; 5937 } 5938 5939 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 5940 map_size = 1; 5941 else 5942 map_size = 2; 5943 5944 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 5945 * not advertise a TID-to-link mapping that does not map all TIDs to the 5946 * same link set, reject frame if not all links have mapping 5947 */ 5948 if (link_map_presence != 0xff) { 5949 sdata_info(sdata, 5950 "Invalid advertised T2L mapping presence indicator\n"); 5951 return -EINVAL; 5952 } 5953 5954 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 5955 if (!ttlm_info->map) { 5956 sdata_info(sdata, 5957 "Invalid advertised T2L map for TID 0\n"); 5958 return -EINVAL; 5959 } 5960 5961 pos += map_size; 5962 5963 for (tid = 1; tid < 8; tid++) { 5964 u16 map = ieee80211_get_ttlm(map_size, pos); 5965 5966 if (map != ttlm_info->map) { 5967 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 5968 tid); 5969 return -EINVAL; 5970 } 5971 5972 pos += map_size; 5973 } 5974 return 0; 5975 } 5976 5977 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 5978 struct ieee802_11_elems *elems, 5979 u64 beacon_ts) 5980 { 5981 u8 i; 5982 int ret; 5983 5984 if (!ieee80211_vif_is_mld(&sdata->vif)) 5985 return; 5986 5987 if (!elems->ttlm_num) { 5988 if (sdata->u.mgd.ttlm_info.switch_time) { 5989 /* if a planned TID-to-link mapping was cancelled - 5990 * abort it 5991 */ 5992 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5993 &sdata->u.mgd.ttlm_work); 5994 } else if (sdata->u.mgd.ttlm_info.active) { 5995 /* if no TID-to-link element, set to default mapping in 5996 * which all TIDs are mapped to all setup links 5997 */ 5998 ret = ieee80211_vif_set_links(sdata, 5999 sdata->vif.valid_links, 6000 0); 6001 if (ret) { 6002 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6003 return; 6004 } 6005 ieee80211_vif_cfg_change_notify(sdata, 6006 BSS_CHANGED_MLD_VALID_LINKS); 6007 } 6008 memset(&sdata->u.mgd.ttlm_info, 0, 6009 sizeof(sdata->u.mgd.ttlm_info)); 6010 return; 6011 } 6012 6013 for (i = 0; i < elems->ttlm_num; i++) { 6014 struct ieee80211_adv_ttlm_info ttlm_info; 6015 u32 res; 6016 6017 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6018 &ttlm_info); 6019 6020 if (res) { 6021 __ieee80211_disconnect(sdata); 6022 return; 6023 } 6024 6025 if (ttlm_info.switch_time) { 6026 u32 st_us, delay = 0; 6027 u32 ts_l26 = beacon_ts & GENMASK(25, 0); 6028 6029 /* The t2l map switch time is indicated with a partial 6030 * TSF value, convert it to TSF and calc the delay 6031 * to the start time. 6032 */ 6033 st_us = ieee80211_tu_to_usec(ttlm_info.switch_time); 6034 if (st_us > ts_l26) 6035 delay = st_us - ts_l26; 6036 else 6037 continue; 6038 6039 sdata->u.mgd.ttlm_info = ttlm_info; 6040 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6041 &sdata->u.mgd.ttlm_work); 6042 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6043 &sdata->u.mgd.ttlm_work, 6044 usecs_to_jiffies(delay)); 6045 return; 6046 } 6047 } 6048 } 6049 6050 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6051 struct ieee80211_hdr *hdr, size_t len, 6052 struct ieee80211_rx_status *rx_status) 6053 { 6054 struct ieee80211_sub_if_data *sdata = link->sdata; 6055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6056 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6057 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6058 struct ieee80211_mgmt *mgmt = (void *) hdr; 6059 size_t baselen; 6060 struct ieee802_11_elems *elems; 6061 struct ieee80211_local *local = sdata->local; 6062 struct ieee80211_chanctx_conf *chanctx_conf; 6063 struct ieee80211_supported_band *sband; 6064 struct ieee80211_channel *chan; 6065 struct link_sta_info *link_sta; 6066 struct sta_info *sta; 6067 u64 changed = 0; 6068 bool erp_valid; 6069 u8 erp_value = 0; 6070 u32 ncrc = 0; 6071 u8 *bssid, *variable = mgmt->u.beacon.variable; 6072 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6073 struct ieee80211_elems_parse_params parse_params = { 6074 .link_id = -1, 6075 .from_ap = true, 6076 }; 6077 6078 lockdep_assert_wiphy(local->hw.wiphy); 6079 6080 /* Process beacon from the current BSS */ 6081 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6082 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6083 struct ieee80211_ext *ext = (void *) mgmt; 6084 6085 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6086 variable = ext->u.s1g_short_beacon.variable; 6087 else 6088 variable = ext->u.s1g_beacon.variable; 6089 } 6090 6091 baselen = (u8 *) variable - (u8 *) mgmt; 6092 if (baselen > len) 6093 return; 6094 6095 parse_params.start = variable; 6096 parse_params.len = len - baselen; 6097 6098 rcu_read_lock(); 6099 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6100 if (!chanctx_conf) { 6101 rcu_read_unlock(); 6102 return; 6103 } 6104 6105 if (ieee80211_rx_status_to_khz(rx_status) != 6106 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6107 rcu_read_unlock(); 6108 return; 6109 } 6110 chan = chanctx_conf->def.chan; 6111 rcu_read_unlock(); 6112 6113 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6114 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6115 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6116 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6117 elems = ieee802_11_parse_elems_full(&parse_params); 6118 if (!elems) 6119 return; 6120 6121 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6122 6123 if (elems->dtim_period) 6124 link->u.mgd.dtim_period = elems->dtim_period; 6125 link->u.mgd.have_beacon = true; 6126 ifmgd->assoc_data->need_beacon = false; 6127 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6128 link->conf->sync_tsf = 6129 le64_to_cpu(mgmt->u.beacon.timestamp); 6130 link->conf->sync_device_ts = 6131 rx_status->device_timestamp; 6132 link->conf->sync_dtim_count = elems->dtim_count; 6133 } 6134 6135 if (elems->mbssid_config_ie) 6136 bss_conf->profile_periodicity = 6137 elems->mbssid_config_ie->profile_periodicity; 6138 else 6139 bss_conf->profile_periodicity = 0; 6140 6141 if (elems->ext_capab_len >= 11 && 6142 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6143 bss_conf->ema_ap = true; 6144 else 6145 bss_conf->ema_ap = false; 6146 6147 /* continue assoc process */ 6148 ifmgd->assoc_data->timeout = jiffies; 6149 ifmgd->assoc_data->timeout_started = true; 6150 run_again(sdata, ifmgd->assoc_data->timeout); 6151 kfree(elems); 6152 return; 6153 } 6154 6155 if (!ifmgd->associated || 6156 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 6157 return; 6158 bssid = link->u.mgd.bssid; 6159 6160 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6161 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6162 local, rx_status); 6163 6164 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6165 mlme_dbg_ratelimited(sdata, 6166 "cancelling AP probe due to a received beacon\n"); 6167 ieee80211_reset_ap_probe(sdata); 6168 } 6169 6170 /* 6171 * Push the beacon loss detection into the future since 6172 * we are processing a beacon from the AP just now. 6173 */ 6174 ieee80211_sta_reset_beacon_monitor(sdata); 6175 6176 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6177 * element (which carries the beacon interval). Don't forget to add a 6178 * bit to care_about_ies[] above if mac80211 is interested in a 6179 * changing S1G element. 6180 */ 6181 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6182 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6183 parse_params.bss = link->u.mgd.bss; 6184 parse_params.filter = care_about_ies; 6185 parse_params.crc = ncrc; 6186 elems = ieee802_11_parse_elems_full(&parse_params); 6187 if (!elems) 6188 return; 6189 ncrc = elems->crc; 6190 6191 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6192 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6193 if (local->hw.conf.dynamic_ps_timeout > 0) { 6194 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6195 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6196 ieee80211_hw_config(local, 6197 IEEE80211_CONF_CHANGE_PS); 6198 } 6199 ieee80211_send_nullfunc(local, sdata, false); 6200 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6201 local->pspolling = true; 6202 6203 /* 6204 * Here is assumed that the driver will be 6205 * able to send ps-poll frame and receive a 6206 * response even though power save mode is 6207 * enabled, but some drivers might require 6208 * to disable power save here. This needs 6209 * to be investigated. 6210 */ 6211 ieee80211_send_pspoll(local, sdata); 6212 } 6213 } 6214 6215 if (sdata->vif.p2p || 6216 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6217 struct ieee80211_p2p_noa_attr noa = {}; 6218 int ret; 6219 6220 ret = cfg80211_get_p2p_attr(variable, 6221 len - baselen, 6222 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6223 (u8 *) &noa, sizeof(noa)); 6224 if (ret >= 2) { 6225 if (link->u.mgd.p2p_noa_index != noa.index) { 6226 /* valid noa_attr and index changed */ 6227 link->u.mgd.p2p_noa_index = noa.index; 6228 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6229 changed |= BSS_CHANGED_P2P_PS; 6230 /* 6231 * make sure we update all information, the CRC 6232 * mechanism doesn't look at P2P attributes. 6233 */ 6234 link->u.mgd.beacon_crc_valid = false; 6235 } 6236 } else if (link->u.mgd.p2p_noa_index != -1) { 6237 /* noa_attr not found and we had valid noa_attr before */ 6238 link->u.mgd.p2p_noa_index = -1; 6239 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6240 changed |= BSS_CHANGED_P2P_PS; 6241 link->u.mgd.beacon_crc_valid = false; 6242 } 6243 } 6244 6245 if (link->u.mgd.csa_waiting_bcn) 6246 ieee80211_chswitch_post_beacon(link); 6247 6248 /* 6249 * Update beacon timing and dtim count on every beacon appearance. This 6250 * will allow the driver to use the most updated values. Do it before 6251 * comparing this one with last received beacon. 6252 * IMPORTANT: These parameters would possibly be out of sync by the time 6253 * the driver will use them. The synchronized view is currently 6254 * guaranteed only in certain callbacks. 6255 */ 6256 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6257 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6258 link->conf->sync_tsf = 6259 le64_to_cpu(mgmt->u.beacon.timestamp); 6260 link->conf->sync_device_ts = 6261 rx_status->device_timestamp; 6262 link->conf->sync_dtim_count = elems->dtim_count; 6263 } 6264 6265 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6266 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6267 goto free; 6268 link->u.mgd.beacon_crc = ncrc; 6269 link->u.mgd.beacon_crc_valid = true; 6270 6271 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6272 6273 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6274 rx_status->device_timestamp, 6275 elems, true); 6276 6277 if (!link->u.mgd.disable_wmm_tracking && 6278 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6279 elems->wmm_param_len, 6280 elems->mu_edca_param_set)) 6281 changed |= BSS_CHANGED_QOS; 6282 6283 /* 6284 * If we haven't had a beacon before, tell the driver about the 6285 * DTIM period (and beacon timing if desired) now. 6286 */ 6287 if (!link->u.mgd.have_beacon) { 6288 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6289 bss_conf->dtim_period = elems->dtim_period ?: 1; 6290 6291 changed |= BSS_CHANGED_BEACON_INFO; 6292 link->u.mgd.have_beacon = true; 6293 6294 ieee80211_recalc_ps(local); 6295 6296 ieee80211_recalc_ps_vif(sdata); 6297 } 6298 6299 if (elems->erp_info) { 6300 erp_valid = true; 6301 erp_value = elems->erp_info[0]; 6302 } else { 6303 erp_valid = false; 6304 } 6305 6306 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6307 changed |= ieee80211_handle_bss_capability(link, 6308 le16_to_cpu(mgmt->u.beacon.capab_info), 6309 erp_valid, erp_value); 6310 6311 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6312 if (WARN_ON(!sta)) { 6313 goto free; 6314 } 6315 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6316 lockdep_is_held(&local->hw.wiphy->mtx)); 6317 if (WARN_ON(!link_sta)) { 6318 goto free; 6319 } 6320 6321 if (WARN_ON(!link->conf->chandef.chan)) 6322 goto free; 6323 6324 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 6325 6326 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6327 6328 if (ieee80211_config_bw(link, elems->ht_cap_elem, 6329 elems->vht_cap_elem, elems->ht_operation, 6330 elems->vht_operation, elems->he_operation, 6331 elems->eht_operation, 6332 elems->s1g_oper, bssid, &changed)) { 6333 sdata_info(sdata, 6334 "failed to follow AP %pM bandwidth change, disconnect\n", 6335 bssid); 6336 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6337 WLAN_REASON_DEAUTH_LEAVING, 6338 true, deauth_buf); 6339 ieee80211_report_disconnect(sdata, deauth_buf, 6340 sizeof(deauth_buf), true, 6341 WLAN_REASON_DEAUTH_LEAVING, 6342 false); 6343 goto free; 6344 } 6345 6346 if (elems->opmode_notif) 6347 ieee80211_vht_handle_opmode(sdata, link_sta, 6348 *elems->opmode_notif, 6349 rx_status->band); 6350 6351 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6352 elems->country_elem, 6353 elems->country_elem_len, 6354 elems->pwr_constr_elem, 6355 elems->cisco_dtpc_elem); 6356 6357 if (elems->eht_operation && 6358 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 6359 if (!ieee80211_config_puncturing(link, elems->eht_operation, 6360 &changed)) { 6361 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6362 WLAN_REASON_DEAUTH_LEAVING, 6363 true, deauth_buf); 6364 ieee80211_report_disconnect(sdata, deauth_buf, 6365 sizeof(deauth_buf), true, 6366 WLAN_REASON_DEAUTH_LEAVING, 6367 false); 6368 goto free; 6369 } 6370 } 6371 6372 ieee80211_ml_reconfiguration(sdata, elems); 6373 ieee80211_process_adv_ttlm(sdata, elems, 6374 le64_to_cpu(mgmt->u.beacon.timestamp)); 6375 6376 ieee80211_link_info_change_notify(sdata, link, changed); 6377 free: 6378 kfree(elems); 6379 } 6380 6381 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 6382 struct sk_buff *skb) 6383 { 6384 struct ieee80211_link_data *link = &sdata->deflink; 6385 struct ieee80211_rx_status *rx_status; 6386 struct ieee80211_hdr *hdr; 6387 u16 fc; 6388 6389 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6390 6391 rx_status = (struct ieee80211_rx_status *) skb->cb; 6392 hdr = (struct ieee80211_hdr *) skb->data; 6393 fc = le16_to_cpu(hdr->frame_control); 6394 6395 switch (fc & IEEE80211_FCTL_STYPE) { 6396 case IEEE80211_STYPE_S1G_BEACON: 6397 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 6398 break; 6399 } 6400 } 6401 6402 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 6403 struct sk_buff *skb) 6404 { 6405 struct ieee80211_link_data *link = &sdata->deflink; 6406 struct ieee80211_rx_status *rx_status; 6407 struct ieee80211_mgmt *mgmt; 6408 u16 fc; 6409 int ies_len; 6410 6411 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6412 6413 rx_status = (struct ieee80211_rx_status *) skb->cb; 6414 mgmt = (struct ieee80211_mgmt *) skb->data; 6415 fc = le16_to_cpu(mgmt->frame_control); 6416 6417 if (rx_status->link_valid) { 6418 link = sdata_dereference(sdata->link[rx_status->link_id], 6419 sdata); 6420 if (!link) 6421 return; 6422 } 6423 6424 switch (fc & IEEE80211_FCTL_STYPE) { 6425 case IEEE80211_STYPE_BEACON: 6426 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 6427 skb->len, rx_status); 6428 break; 6429 case IEEE80211_STYPE_PROBE_RESP: 6430 ieee80211_rx_mgmt_probe_resp(link, skb); 6431 break; 6432 case IEEE80211_STYPE_AUTH: 6433 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 6434 break; 6435 case IEEE80211_STYPE_DEAUTH: 6436 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6437 break; 6438 case IEEE80211_STYPE_DISASSOC: 6439 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6440 break; 6441 case IEEE80211_STYPE_ASSOC_RESP: 6442 case IEEE80211_STYPE_REASSOC_RESP: 6443 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6444 break; 6445 case IEEE80211_STYPE_ACTION: 6446 if (!sdata->u.mgd.associated || 6447 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 6448 break; 6449 6450 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6451 struct ieee802_11_elems *elems; 6452 6453 ies_len = skb->len - 6454 offsetof(struct ieee80211_mgmt, 6455 u.action.u.chan_switch.variable); 6456 6457 if (ies_len < 0) 6458 break; 6459 6460 /* CSA IE cannot be overridden, no need for BSSID */ 6461 elems = ieee802_11_parse_elems( 6462 mgmt->u.action.u.chan_switch.variable, 6463 ies_len, true, NULL); 6464 6465 if (elems && !elems->parse_error) 6466 ieee80211_sta_process_chanswitch(link, 6467 rx_status->mactime, 6468 rx_status->device_timestamp, 6469 elems, false); 6470 kfree(elems); 6471 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6472 struct ieee802_11_elems *elems; 6473 6474 ies_len = skb->len - 6475 offsetof(struct ieee80211_mgmt, 6476 u.action.u.ext_chan_switch.variable); 6477 6478 if (ies_len < 0) 6479 break; 6480 6481 /* 6482 * extended CSA IE can't be overridden, no need for 6483 * BSSID 6484 */ 6485 elems = ieee802_11_parse_elems( 6486 mgmt->u.action.u.ext_chan_switch.variable, 6487 ies_len, true, NULL); 6488 6489 if (elems && !elems->parse_error) { 6490 /* for the handling code pretend it was an IE */ 6491 elems->ext_chansw_ie = 6492 &mgmt->u.action.u.ext_chan_switch.data; 6493 6494 ieee80211_sta_process_chanswitch(link, 6495 rx_status->mactime, 6496 rx_status->device_timestamp, 6497 elems, false); 6498 } 6499 6500 kfree(elems); 6501 } 6502 break; 6503 } 6504 } 6505 6506 static void ieee80211_sta_timer(struct timer_list *t) 6507 { 6508 struct ieee80211_sub_if_data *sdata = 6509 from_timer(sdata, t, u.mgd.timer); 6510 6511 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6512 } 6513 6514 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6515 u8 reason, bool tx) 6516 { 6517 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6518 6519 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6520 tx, frame_buf); 6521 6522 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6523 reason, false); 6524 } 6525 6526 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6527 { 6528 struct ieee80211_local *local = sdata->local; 6529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6530 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6531 u32 tx_flags = 0; 6532 u16 trans = 1; 6533 u16 status = 0; 6534 struct ieee80211_prep_tx_info info = { 6535 .subtype = IEEE80211_STYPE_AUTH, 6536 }; 6537 6538 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6539 6540 if (WARN_ON_ONCE(!auth_data)) 6541 return -EINVAL; 6542 6543 auth_data->tries++; 6544 6545 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6546 sdata_info(sdata, "authentication with %pM timed out\n", 6547 auth_data->ap_addr); 6548 6549 /* 6550 * Most likely AP is not in the range so remove the 6551 * bss struct for that AP. 6552 */ 6553 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6554 6555 return -ETIMEDOUT; 6556 } 6557 6558 if (auth_data->algorithm == WLAN_AUTH_SAE) 6559 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6560 6561 drv_mgd_prepare_tx(local, sdata, &info); 6562 6563 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6564 auth_data->ap_addr, auth_data->tries, 6565 IEEE80211_AUTH_MAX_TRIES); 6566 6567 auth_data->expected_transaction = 2; 6568 6569 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6570 trans = auth_data->sae_trans; 6571 status = auth_data->sae_status; 6572 auth_data->expected_transaction = trans; 6573 } 6574 6575 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6576 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6577 IEEE80211_TX_INTFL_MLME_CONN_TX; 6578 6579 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6580 auth_data->data, auth_data->data_len, 6581 auth_data->ap_addr, auth_data->ap_addr, 6582 NULL, 0, 0, tx_flags); 6583 6584 if (tx_flags == 0) { 6585 if (auth_data->algorithm == WLAN_AUTH_SAE) 6586 auth_data->timeout = jiffies + 6587 IEEE80211_AUTH_TIMEOUT_SAE; 6588 else 6589 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6590 } else { 6591 auth_data->timeout = 6592 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6593 } 6594 6595 auth_data->timeout_started = true; 6596 run_again(sdata, auth_data->timeout); 6597 6598 return 0; 6599 } 6600 6601 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6602 { 6603 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6604 struct ieee80211_local *local = sdata->local; 6605 int ret; 6606 6607 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6608 6609 assoc_data->tries++; 6610 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6611 sdata_info(sdata, "association with %pM timed out\n", 6612 assoc_data->ap_addr); 6613 6614 /* 6615 * Most likely AP is not in the range so remove the 6616 * bss struct for that AP. 6617 */ 6618 cfg80211_unlink_bss(local->hw.wiphy, 6619 assoc_data->link[assoc_data->assoc_link_id].bss); 6620 6621 return -ETIMEDOUT; 6622 } 6623 6624 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6625 assoc_data->ap_addr, assoc_data->tries, 6626 IEEE80211_ASSOC_MAX_TRIES); 6627 ret = ieee80211_send_assoc(sdata); 6628 if (ret) 6629 return ret; 6630 6631 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6632 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6633 assoc_data->timeout_started = true; 6634 run_again(sdata, assoc_data->timeout); 6635 } else { 6636 assoc_data->timeout = 6637 round_jiffies_up(jiffies + 6638 IEEE80211_ASSOC_TIMEOUT_LONG); 6639 assoc_data->timeout_started = true; 6640 run_again(sdata, assoc_data->timeout); 6641 } 6642 6643 return 0; 6644 } 6645 6646 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6647 __le16 fc, bool acked) 6648 { 6649 struct ieee80211_local *local = sdata->local; 6650 6651 sdata->u.mgd.status_fc = fc; 6652 sdata->u.mgd.status_acked = acked; 6653 sdata->u.mgd.status_received = true; 6654 6655 wiphy_work_queue(local->hw.wiphy, &sdata->work); 6656 } 6657 6658 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6659 { 6660 struct ieee80211_local *local = sdata->local; 6661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6662 6663 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6664 6665 if (ifmgd->status_received) { 6666 __le16 fc = ifmgd->status_fc; 6667 bool status_acked = ifmgd->status_acked; 6668 6669 ifmgd->status_received = false; 6670 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6671 if (status_acked) { 6672 if (ifmgd->auth_data->algorithm == 6673 WLAN_AUTH_SAE) 6674 ifmgd->auth_data->timeout = 6675 jiffies + 6676 IEEE80211_AUTH_TIMEOUT_SAE; 6677 else 6678 ifmgd->auth_data->timeout = 6679 jiffies + 6680 IEEE80211_AUTH_TIMEOUT_SHORT; 6681 run_again(sdata, ifmgd->auth_data->timeout); 6682 } else { 6683 ifmgd->auth_data->timeout = jiffies - 1; 6684 } 6685 ifmgd->auth_data->timeout_started = true; 6686 } else if (ifmgd->assoc_data && 6687 (ieee80211_is_assoc_req(fc) || 6688 ieee80211_is_reassoc_req(fc))) { 6689 if (status_acked) { 6690 ifmgd->assoc_data->timeout = 6691 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6692 run_again(sdata, ifmgd->assoc_data->timeout); 6693 } else { 6694 ifmgd->assoc_data->timeout = jiffies - 1; 6695 } 6696 ifmgd->assoc_data->timeout_started = true; 6697 } 6698 } 6699 6700 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6701 time_after(jiffies, ifmgd->auth_data->timeout)) { 6702 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6703 /* 6704 * ok ... we waited for assoc or continuation but 6705 * userspace didn't do it, so kill the auth data 6706 */ 6707 ieee80211_destroy_auth_data(sdata, false); 6708 } else if (ieee80211_auth(sdata)) { 6709 u8 ap_addr[ETH_ALEN]; 6710 struct ieee80211_event event = { 6711 .type = MLME_EVENT, 6712 .u.mlme.data = AUTH_EVENT, 6713 .u.mlme.status = MLME_TIMEOUT, 6714 }; 6715 6716 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6717 6718 ieee80211_destroy_auth_data(sdata, false); 6719 6720 cfg80211_auth_timeout(sdata->dev, ap_addr); 6721 drv_event_callback(sdata->local, sdata, &event); 6722 } 6723 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6724 run_again(sdata, ifmgd->auth_data->timeout); 6725 6726 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6727 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6728 if ((ifmgd->assoc_data->need_beacon && 6729 !sdata->deflink.u.mgd.have_beacon) || 6730 ieee80211_do_assoc(sdata)) { 6731 struct ieee80211_event event = { 6732 .type = MLME_EVENT, 6733 .u.mlme.data = ASSOC_EVENT, 6734 .u.mlme.status = MLME_TIMEOUT, 6735 }; 6736 6737 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6738 drv_event_callback(sdata->local, sdata, &event); 6739 } 6740 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6741 run_again(sdata, ifmgd->assoc_data->timeout); 6742 6743 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6744 ifmgd->associated) { 6745 u8 *bssid = sdata->deflink.u.mgd.bssid; 6746 int max_tries; 6747 6748 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6749 max_tries = max_nullfunc_tries; 6750 else 6751 max_tries = max_probe_tries; 6752 6753 /* ACK received for nullfunc probing frame */ 6754 if (!ifmgd->probe_send_count) 6755 ieee80211_reset_ap_probe(sdata); 6756 else if (ifmgd->nullfunc_failed) { 6757 if (ifmgd->probe_send_count < max_tries) { 6758 mlme_dbg(sdata, 6759 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6760 bssid, ifmgd->probe_send_count, 6761 max_tries); 6762 ieee80211_mgd_probe_ap_send(sdata); 6763 } else { 6764 mlme_dbg(sdata, 6765 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6766 bssid); 6767 ieee80211_sta_connection_lost(sdata, 6768 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6769 false); 6770 } 6771 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6772 run_again(sdata, ifmgd->probe_timeout); 6773 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6774 mlme_dbg(sdata, 6775 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6776 bssid, probe_wait_ms); 6777 ieee80211_sta_connection_lost(sdata, 6778 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6779 } else if (ifmgd->probe_send_count < max_tries) { 6780 mlme_dbg(sdata, 6781 "No probe response from AP %pM after %dms, try %d/%i\n", 6782 bssid, probe_wait_ms, 6783 ifmgd->probe_send_count, max_tries); 6784 ieee80211_mgd_probe_ap_send(sdata); 6785 } else { 6786 /* 6787 * We actually lost the connection ... or did we? 6788 * Let's make sure! 6789 */ 6790 mlme_dbg(sdata, 6791 "No probe response from AP %pM after %dms, disconnecting.\n", 6792 bssid, probe_wait_ms); 6793 6794 ieee80211_sta_connection_lost(sdata, 6795 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6796 } 6797 } 6798 } 6799 6800 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6801 { 6802 struct ieee80211_sub_if_data *sdata = 6803 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6804 6805 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6806 return; 6807 6808 if (sdata->vif.bss_conf.csa_active && 6809 !sdata->deflink.u.mgd.csa_waiting_bcn) 6810 return; 6811 6812 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6813 return; 6814 6815 sdata->u.mgd.connection_loss = false; 6816 wiphy_work_queue(sdata->local->hw.wiphy, 6817 &sdata->u.mgd.beacon_connection_loss_work); 6818 } 6819 6820 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6821 { 6822 struct ieee80211_sub_if_data *sdata = 6823 from_timer(sdata, t, u.mgd.conn_mon_timer); 6824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6825 struct ieee80211_local *local = sdata->local; 6826 struct sta_info *sta; 6827 unsigned long timeout; 6828 6829 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6830 return; 6831 6832 if (sdata->vif.bss_conf.csa_active && 6833 !sdata->deflink.u.mgd.csa_waiting_bcn) 6834 return; 6835 6836 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6837 if (!sta) 6838 return; 6839 6840 timeout = sta->deflink.status_stats.last_ack; 6841 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6842 timeout = sta->deflink.rx_stats.last_rx; 6843 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6844 6845 /* If timeout is after now, then update timer to fire at 6846 * the later date, but do not actually probe at this time. 6847 */ 6848 if (time_is_after_jiffies(timeout)) { 6849 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6850 return; 6851 } 6852 6853 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 6854 } 6855 6856 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 6857 struct wiphy_work *work) 6858 { 6859 struct ieee80211_sub_if_data *sdata = 6860 container_of(work, struct ieee80211_sub_if_data, 6861 u.mgd.monitor_work); 6862 6863 ieee80211_mgd_probe_ap(sdata, false); 6864 } 6865 6866 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6867 { 6868 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6869 __ieee80211_stop_poll(sdata); 6870 6871 /* let's probe the connection once */ 6872 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6873 wiphy_work_queue(sdata->local->hw.wiphy, 6874 &sdata->u.mgd.monitor_work); 6875 } 6876 } 6877 6878 #ifdef CONFIG_PM 6879 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6880 { 6881 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6882 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6883 6884 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6885 6886 if (ifmgd->auth_data || ifmgd->assoc_data) { 6887 const u8 *ap_addr = ifmgd->auth_data ? 6888 ifmgd->auth_data->ap_addr : 6889 ifmgd->assoc_data->ap_addr; 6890 6891 /* 6892 * If we are trying to authenticate / associate while suspending, 6893 * cfg80211 won't know and won't actually abort those attempts, 6894 * thus we need to do that ourselves. 6895 */ 6896 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6897 IEEE80211_STYPE_DEAUTH, 6898 WLAN_REASON_DEAUTH_LEAVING, 6899 false, frame_buf); 6900 if (ifmgd->assoc_data) 6901 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6902 if (ifmgd->auth_data) 6903 ieee80211_destroy_auth_data(sdata, false); 6904 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6905 IEEE80211_DEAUTH_FRAME_LEN, 6906 false); 6907 } 6908 6909 /* This is a bit of a hack - we should find a better and more generic 6910 * solution to this. Normally when suspending, cfg80211 will in fact 6911 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6912 * auth (not so important) or assoc (this is the problem) process. 6913 * 6914 * As a consequence, it can happen that we are in the process of both 6915 * associating and suspending, and receive an association response 6916 * after cfg80211 has checked if it needs to disconnect, but before 6917 * we actually set the flag to drop incoming frames. This will then 6918 * cause the workqueue flush to process the association response in 6919 * the suspend, resulting in a successful association just before it 6920 * tries to remove the interface from the driver, which now though 6921 * has a channel context assigned ... this results in issues. 6922 * 6923 * To work around this (for now) simply deauth here again if we're 6924 * now connected. 6925 */ 6926 if (ifmgd->associated && !sdata->local->wowlan) { 6927 u8 bssid[ETH_ALEN]; 6928 struct cfg80211_deauth_request req = { 6929 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6930 .bssid = bssid, 6931 }; 6932 6933 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6934 ieee80211_mgd_deauth(sdata, &req); 6935 } 6936 } 6937 #endif 6938 6939 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6940 { 6941 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6942 6943 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6944 6945 if (!ifmgd->associated) 6946 return; 6947 6948 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6949 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6950 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6951 ieee80211_sta_connection_lost(sdata, 6952 WLAN_REASON_UNSPECIFIED, 6953 true); 6954 return; 6955 } 6956 6957 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6958 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6959 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6960 ieee80211_sta_connection_lost(sdata, 6961 WLAN_REASON_UNSPECIFIED, 6962 true); 6963 return; 6964 } 6965 } 6966 6967 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 6968 struct wiphy_work *work) 6969 { 6970 struct ieee80211_link_data *link = 6971 container_of(work, struct ieee80211_link_data, 6972 u.mgd.request_smps_work); 6973 6974 __ieee80211_request_smps_mgd(link->sdata, link, 6975 link->u.mgd.driver_smps_mode); 6976 } 6977 6978 /* interface setup */ 6979 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6980 { 6981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6982 6983 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6984 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 6985 ieee80211_beacon_connection_loss_work); 6986 wiphy_work_init(&ifmgd->csa_connection_drop_work, 6987 ieee80211_csa_connection_drop_work); 6988 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 6989 ieee80211_tdls_peer_del_work); 6990 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 6991 ieee80211_ml_reconf_work); 6992 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6993 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6994 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6995 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 6996 ieee80211_sta_handle_tspec_ac_params_wk); 6997 wiphy_delayed_work_init(&ifmgd->ttlm_work, 6998 ieee80211_tid_to_link_map_work); 6999 7000 ifmgd->flags = 0; 7001 ifmgd->powersave = sdata->wdev.ps; 7002 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 7003 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 7004 /* Setup TDLS data */ 7005 spin_lock_init(&ifmgd->teardown_lock); 7006 ifmgd->teardown_skb = NULL; 7007 ifmgd->orig_teardown_skb = NULL; 7008 } 7009 7010 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 7011 struct wiphy_work *work) 7012 { 7013 struct ieee80211_link_data *link = 7014 container_of(work, struct ieee80211_link_data, 7015 u.mgd.recalc_smps); 7016 7017 ieee80211_recalc_smps(link->sdata, link); 7018 } 7019 7020 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 7021 { 7022 struct ieee80211_sub_if_data *sdata = link->sdata; 7023 struct ieee80211_local *local = sdata->local; 7024 unsigned int link_id = link->link_id; 7025 7026 link->u.mgd.p2p_noa_index = -1; 7027 link->u.mgd.conn_flags = 0; 7028 link->conf->bssid = link->u.mgd.bssid; 7029 7030 wiphy_work_init(&link->u.mgd.request_smps_work, 7031 ieee80211_request_smps_mgd_work); 7032 wiphy_work_init(&link->u.mgd.recalc_smps, 7033 ieee80211_recalc_smps_work); 7034 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 7035 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 7036 else 7037 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 7038 7039 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 7040 ieee80211_chswitch_work); 7041 7042 if (sdata->u.mgd.assoc_data) 7043 ether_addr_copy(link->conf->addr, 7044 sdata->u.mgd.assoc_data->link[link_id].addr); 7045 else if (!is_valid_ether_addr(link->conf->addr)) 7046 eth_random_addr(link->conf->addr); 7047 } 7048 7049 /* scan finished notification */ 7050 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 7051 { 7052 struct ieee80211_sub_if_data *sdata; 7053 7054 /* Restart STA timers */ 7055 rcu_read_lock(); 7056 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 7057 if (ieee80211_sdata_running(sdata)) 7058 ieee80211_restart_sta_timer(sdata); 7059 } 7060 rcu_read_unlock(); 7061 } 7062 7063 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 7064 struct cfg80211_bss *cbss, s8 link_id, 7065 const u8 *ap_mld_addr, bool assoc, 7066 bool override) 7067 { 7068 struct ieee80211_local *local = sdata->local; 7069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7070 struct ieee80211_bss *bss = (void *)cbss->priv; 7071 struct sta_info *new_sta = NULL; 7072 struct ieee80211_link_data *link; 7073 bool have_sta = false; 7074 bool mlo; 7075 int err; 7076 7077 if (link_id >= 0) { 7078 mlo = true; 7079 if (WARN_ON(!ap_mld_addr)) 7080 return -EINVAL; 7081 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 7082 } else { 7083 if (WARN_ON(ap_mld_addr)) 7084 return -EINVAL; 7085 ap_mld_addr = cbss->bssid; 7086 err = ieee80211_vif_set_links(sdata, 0, 0); 7087 link_id = 0; 7088 mlo = false; 7089 } 7090 7091 if (err) 7092 return err; 7093 7094 link = sdata_dereference(sdata->link[link_id], sdata); 7095 if (WARN_ON(!link)) { 7096 err = -ENOLINK; 7097 goto out_err; 7098 } 7099 7100 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 7101 err = -EINVAL; 7102 goto out_err; 7103 } 7104 7105 /* If a reconfig is happening, bail out */ 7106 if (local->in_reconfig) { 7107 err = -EBUSY; 7108 goto out_err; 7109 } 7110 7111 if (assoc) { 7112 rcu_read_lock(); 7113 have_sta = sta_info_get(sdata, ap_mld_addr); 7114 rcu_read_unlock(); 7115 } 7116 7117 if (!have_sta) { 7118 if (mlo) 7119 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 7120 link_id, cbss->bssid, 7121 GFP_KERNEL); 7122 else 7123 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 7124 7125 if (!new_sta) { 7126 err = -ENOMEM; 7127 goto out_err; 7128 } 7129 7130 new_sta->sta.mlo = mlo; 7131 } 7132 7133 /* 7134 * Set up the information for the new channel before setting the 7135 * new channel. We can't - completely race-free - change the basic 7136 * rates bitmap and the channel (sband) that it refers to, but if 7137 * we set it up before we at least avoid calling into the driver's 7138 * bss_info_changed() method with invalid information (since we do 7139 * call that from changing the channel - only for IDLE and perhaps 7140 * some others, but ...). 7141 * 7142 * So to avoid that, just set up all the new information before the 7143 * channel, but tell the driver to apply it only afterwards, since 7144 * it might need the new channel for that. 7145 */ 7146 if (new_sta) { 7147 const struct cfg80211_bss_ies *ies; 7148 struct link_sta_info *link_sta; 7149 7150 rcu_read_lock(); 7151 link_sta = rcu_dereference(new_sta->link[link_id]); 7152 if (WARN_ON(!link_sta)) { 7153 rcu_read_unlock(); 7154 sta_info_free(local, new_sta); 7155 err = -EINVAL; 7156 goto out_err; 7157 } 7158 7159 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7160 link_sta, cbss); 7161 if (err) { 7162 rcu_read_unlock(); 7163 sta_info_free(local, new_sta); 7164 goto out_err; 7165 } 7166 7167 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7168 7169 /* set timing information */ 7170 link->conf->beacon_int = cbss->beacon_interval; 7171 ies = rcu_dereference(cbss->beacon_ies); 7172 if (ies) { 7173 link->conf->sync_tsf = ies->tsf; 7174 link->conf->sync_device_ts = 7175 bss->device_ts_beacon; 7176 7177 ieee80211_get_dtim(ies, 7178 &link->conf->sync_dtim_count, 7179 NULL); 7180 } else if (!ieee80211_hw_check(&sdata->local->hw, 7181 TIMING_BEACON_ONLY)) { 7182 ies = rcu_dereference(cbss->proberesp_ies); 7183 /* must be non-NULL since beacon IEs were NULL */ 7184 link->conf->sync_tsf = ies->tsf; 7185 link->conf->sync_device_ts = 7186 bss->device_ts_presp; 7187 link->conf->sync_dtim_count = 0; 7188 } else { 7189 link->conf->sync_tsf = 0; 7190 link->conf->sync_device_ts = 0; 7191 link->conf->sync_dtim_count = 0; 7192 } 7193 rcu_read_unlock(); 7194 } 7195 7196 if (new_sta || override) { 7197 err = ieee80211_prep_channel(sdata, link, cbss, mlo, 7198 &link->u.mgd.conn_flags); 7199 if (err) { 7200 if (new_sta) 7201 sta_info_free(local, new_sta); 7202 goto out_err; 7203 } 7204 } 7205 7206 if (new_sta) { 7207 /* 7208 * tell driver about BSSID, basic rates and timing 7209 * this was set up above, before setting the channel 7210 */ 7211 ieee80211_link_info_change_notify(sdata, link, 7212 BSS_CHANGED_BSSID | 7213 BSS_CHANGED_BASIC_RATES | 7214 BSS_CHANGED_BEACON_INT); 7215 7216 if (assoc) 7217 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7218 7219 err = sta_info_insert(new_sta); 7220 new_sta = NULL; 7221 if (err) { 7222 sdata_info(sdata, 7223 "failed to insert STA entry for the AP (error %d)\n", 7224 err); 7225 goto out_err; 7226 } 7227 } else 7228 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7229 7230 /* Cancel scan to ensure that nothing interferes with connection */ 7231 if (local->scanning) 7232 ieee80211_scan_cancel(local); 7233 7234 return 0; 7235 7236 out_err: 7237 ieee80211_link_release_channel(&sdata->deflink); 7238 ieee80211_vif_set_links(sdata, 0, 0); 7239 return err; 7240 } 7241 7242 /* config hooks */ 7243 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 7244 struct cfg80211_auth_request *req) 7245 { 7246 struct ieee80211_local *local = sdata->local; 7247 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7248 struct ieee80211_mgd_auth_data *auth_data; 7249 struct ieee80211_link_data *link; 7250 const struct element *csa_elem, *ecsa_elem; 7251 u16 auth_alg; 7252 int err; 7253 bool cont_auth; 7254 7255 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7256 7257 /* prepare auth data structure */ 7258 7259 switch (req->auth_type) { 7260 case NL80211_AUTHTYPE_OPEN_SYSTEM: 7261 auth_alg = WLAN_AUTH_OPEN; 7262 break; 7263 case NL80211_AUTHTYPE_SHARED_KEY: 7264 if (fips_enabled) 7265 return -EOPNOTSUPP; 7266 auth_alg = WLAN_AUTH_SHARED_KEY; 7267 break; 7268 case NL80211_AUTHTYPE_FT: 7269 auth_alg = WLAN_AUTH_FT; 7270 break; 7271 case NL80211_AUTHTYPE_NETWORK_EAP: 7272 auth_alg = WLAN_AUTH_LEAP; 7273 break; 7274 case NL80211_AUTHTYPE_SAE: 7275 auth_alg = WLAN_AUTH_SAE; 7276 break; 7277 case NL80211_AUTHTYPE_FILS_SK: 7278 auth_alg = WLAN_AUTH_FILS_SK; 7279 break; 7280 case NL80211_AUTHTYPE_FILS_SK_PFS: 7281 auth_alg = WLAN_AUTH_FILS_SK_PFS; 7282 break; 7283 case NL80211_AUTHTYPE_FILS_PK: 7284 auth_alg = WLAN_AUTH_FILS_PK; 7285 break; 7286 default: 7287 return -EOPNOTSUPP; 7288 } 7289 7290 if (ifmgd->assoc_data) 7291 return -EBUSY; 7292 7293 rcu_read_lock(); 7294 csa_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_CHANNEL_SWITCH); 7295 ecsa_elem = ieee80211_bss_get_elem(req->bss, 7296 WLAN_EID_EXT_CHANSWITCH_ANN); 7297 if ((csa_elem && 7298 csa_elem->datalen == sizeof(struct ieee80211_channel_sw_ie) && 7299 ((struct ieee80211_channel_sw_ie *)csa_elem->data)->count != 0) || 7300 (ecsa_elem && 7301 ecsa_elem->datalen == sizeof(struct ieee80211_ext_chansw_ie) && 7302 ((struct ieee80211_ext_chansw_ie *)ecsa_elem->data)->count != 0)) { 7303 rcu_read_unlock(); 7304 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 7305 return -EINVAL; 7306 } 7307 rcu_read_unlock(); 7308 7309 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 7310 req->ie_len, GFP_KERNEL); 7311 if (!auth_data) 7312 return -ENOMEM; 7313 7314 memcpy(auth_data->ap_addr, 7315 req->ap_mld_addr ?: req->bss->bssid, 7316 ETH_ALEN); 7317 auth_data->bss = req->bss; 7318 auth_data->link_id = req->link_id; 7319 7320 if (req->auth_data_len >= 4) { 7321 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 7322 __le16 *pos = (__le16 *) req->auth_data; 7323 7324 auth_data->sae_trans = le16_to_cpu(pos[0]); 7325 auth_data->sae_status = le16_to_cpu(pos[1]); 7326 } 7327 memcpy(auth_data->data, req->auth_data + 4, 7328 req->auth_data_len - 4); 7329 auth_data->data_len += req->auth_data_len - 4; 7330 } 7331 7332 /* Check if continuing authentication or trying to authenticate with the 7333 * same BSS that we were in the process of authenticating with and avoid 7334 * removal and re-addition of the STA entry in 7335 * ieee80211_prep_connection(). 7336 */ 7337 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 7338 ifmgd->auth_data->link_id == req->link_id; 7339 7340 if (req->ie && req->ie_len) { 7341 memcpy(&auth_data->data[auth_data->data_len], 7342 req->ie, req->ie_len); 7343 auth_data->data_len += req->ie_len; 7344 } 7345 7346 if (req->key && req->key_len) { 7347 auth_data->key_len = req->key_len; 7348 auth_data->key_idx = req->key_idx; 7349 memcpy(auth_data->key, req->key, req->key_len); 7350 } 7351 7352 auth_data->algorithm = auth_alg; 7353 7354 /* try to authenticate/probe */ 7355 7356 if (ifmgd->auth_data) { 7357 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 7358 auth_data->peer_confirmed = 7359 ifmgd->auth_data->peer_confirmed; 7360 } 7361 ieee80211_destroy_auth_data(sdata, cont_auth); 7362 } 7363 7364 /* prep auth_data so we don't go into idle on disassoc */ 7365 ifmgd->auth_data = auth_data; 7366 7367 /* If this is continuation of an ongoing SAE authentication exchange 7368 * (i.e., request to send SAE Confirm) and the peer has already 7369 * confirmed, mark authentication completed since we are about to send 7370 * out SAE Confirm. 7371 */ 7372 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 7373 auth_data->peer_confirmed && auth_data->sae_trans == 2) 7374 ieee80211_mark_sta_auth(sdata); 7375 7376 if (ifmgd->associated) { 7377 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7378 7379 sdata_info(sdata, 7380 "disconnect from AP %pM for new auth to %pM\n", 7381 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 7382 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7383 WLAN_REASON_UNSPECIFIED, 7384 false, frame_buf); 7385 7386 ieee80211_report_disconnect(sdata, frame_buf, 7387 sizeof(frame_buf), true, 7388 WLAN_REASON_UNSPECIFIED, 7389 false); 7390 } 7391 7392 /* needed for transmitting the auth frame(s) properly */ 7393 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 7394 7395 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 7396 req->ap_mld_addr, cont_auth, false); 7397 if (err) 7398 goto err_clear; 7399 7400 if (req->link_id > 0) 7401 link = sdata_dereference(sdata->link[req->link_id], sdata); 7402 else 7403 link = sdata_dereference(sdata->link[0], sdata); 7404 7405 if (WARN_ON(!link)) { 7406 err = -ENOLINK; 7407 goto err_clear; 7408 } 7409 7410 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 7411 auth_data->ap_addr, link->conf->addr); 7412 7413 err = ieee80211_auth(sdata); 7414 if (err) { 7415 sta_info_destroy_addr(sdata, auth_data->ap_addr); 7416 goto err_clear; 7417 } 7418 7419 /* hold our own reference */ 7420 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 7421 return 0; 7422 7423 err_clear: 7424 if (!ieee80211_vif_is_mld(&sdata->vif)) { 7425 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7426 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7427 BSS_CHANGED_BSSID); 7428 ieee80211_link_release_channel(&sdata->deflink); 7429 } 7430 ifmgd->auth_data = NULL; 7431 kfree(auth_data); 7432 return err; 7433 } 7434 7435 static ieee80211_conn_flags_t 7436 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 7437 struct ieee80211_mgd_assoc_data *assoc_data, 7438 struct cfg80211_assoc_request *req, 7439 ieee80211_conn_flags_t conn_flags, 7440 unsigned int link_id) 7441 { 7442 struct ieee80211_local *local = sdata->local; 7443 const struct cfg80211_bss_ies *bss_ies; 7444 struct ieee80211_supported_band *sband; 7445 const struct element *ht_elem, *vht_elem; 7446 struct ieee80211_link_data *link; 7447 struct cfg80211_bss *cbss; 7448 struct ieee80211_bss *bss; 7449 bool is_5ghz, is_6ghz; 7450 7451 cbss = assoc_data->link[link_id].bss; 7452 if (WARN_ON(!cbss)) 7453 return 0; 7454 7455 bss = (void *)cbss->priv; 7456 7457 sband = local->hw.wiphy->bands[cbss->channel->band]; 7458 if (WARN_ON(!sband)) 7459 return 0; 7460 7461 link = sdata_dereference(sdata->link[link_id], sdata); 7462 if (WARN_ON(!link)) 7463 return 0; 7464 7465 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 7466 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 7467 7468 /* for MLO connections assume advertising all rates is OK */ 7469 if (!req->ap_mld_addr) { 7470 assoc_data->supp_rates = bss->supp_rates; 7471 assoc_data->supp_rates_len = bss->supp_rates_len; 7472 } 7473 7474 /* copy and link elems for the STA profile */ 7475 if (req->links[link_id].elems_len) { 7476 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7477 req->links[link_id].elems_len); 7478 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7479 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7480 assoc_data->ie_pos += req->links[link_id].elems_len; 7481 } 7482 7483 rcu_read_lock(); 7484 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7485 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7486 assoc_data->link[link_id].ap_ht_param = 7487 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7488 else if (!is_6ghz) 7489 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7490 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7491 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7492 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7493 sizeof(struct ieee80211_vht_cap)); 7494 } else if (is_5ghz) { 7495 link_info(link, 7496 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7497 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7498 IEEE80211_CONN_DISABLE_HE | 7499 IEEE80211_CONN_DISABLE_EHT; 7500 } 7501 rcu_read_unlock(); 7502 7503 link->u.mgd.beacon_crc_valid = false; 7504 link->u.mgd.dtim_period = 0; 7505 link->u.mgd.have_beacon = false; 7506 7507 /* override HT/VHT configuration only if the AP and we support it */ 7508 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7509 struct ieee80211_sta_ht_cap sta_ht_cap; 7510 7511 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7512 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7513 } 7514 7515 link->conf->eht_puncturing = 0; 7516 7517 rcu_read_lock(); 7518 bss_ies = rcu_dereference(cbss->beacon_ies); 7519 if (bss_ies) { 7520 u8 dtim_count = 0; 7521 7522 ieee80211_get_dtim(bss_ies, &dtim_count, 7523 &link->u.mgd.dtim_period); 7524 7525 sdata->deflink.u.mgd.have_beacon = true; 7526 7527 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7528 link->conf->sync_tsf = bss_ies->tsf; 7529 link->conf->sync_device_ts = bss->device_ts_beacon; 7530 link->conf->sync_dtim_count = dtim_count; 7531 } 7532 } else { 7533 bss_ies = rcu_dereference(cbss->ies); 7534 } 7535 7536 if (bss_ies) { 7537 const struct ieee80211_eht_operation *eht_oper; 7538 const struct element *elem; 7539 7540 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7541 bss_ies->data, bss_ies->len); 7542 if (elem && elem->datalen >= 3) 7543 link->conf->profile_periodicity = elem->data[2]; 7544 else 7545 link->conf->profile_periodicity = 0; 7546 7547 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7548 bss_ies->data, bss_ies->len); 7549 if (elem && elem->datalen >= 11 && 7550 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7551 link->conf->ema_ap = true; 7552 else 7553 link->conf->ema_ap = false; 7554 7555 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7556 bss_ies->data, bss_ies->len); 7557 eht_oper = (const void *)(elem->data + 1); 7558 7559 if (elem && 7560 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7561 elem->datalen - 1) && 7562 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7563 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7564 const struct ieee80211_eht_operation_info *info = 7565 (void *)eht_oper->optional; 7566 const u8 *disable_subchannel_bitmap = info->optional; 7567 u16 bitmap; 7568 7569 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7570 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7571 &link->conf->chandef)) 7572 ieee80211_handle_puncturing_bitmap(link, 7573 eht_oper, 7574 bitmap, 7575 NULL); 7576 else 7577 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7578 } 7579 } 7580 rcu_read_unlock(); 7581 7582 if (bss->corrupt_data) { 7583 char *corrupt_type = "data"; 7584 7585 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7586 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7587 corrupt_type = "beacon and probe response"; 7588 else 7589 corrupt_type = "beacon"; 7590 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7591 corrupt_type = "probe response"; 7592 } 7593 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7594 cbss->bssid, corrupt_type); 7595 } 7596 7597 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7598 if (sdata->u.mgd.powersave) 7599 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7600 else 7601 link->smps_mode = IEEE80211_SMPS_OFF; 7602 } else { 7603 link->smps_mode = link->u.mgd.req_smps; 7604 } 7605 7606 return conn_flags; 7607 } 7608 7609 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7610 struct cfg80211_assoc_request *req) 7611 { 7612 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7613 struct ieee80211_local *local = sdata->local; 7614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7615 struct ieee80211_mgd_assoc_data *assoc_data; 7616 const struct element *ssid_elem, *csa_elem, *ecsa_elem; 7617 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7618 ieee80211_conn_flags_t conn_flags = 0; 7619 struct ieee80211_link_data *link; 7620 struct cfg80211_bss *cbss; 7621 struct ieee80211_bss *bss; 7622 bool override; 7623 int i, err; 7624 size_t size = sizeof(*assoc_data) + req->ie_len; 7625 7626 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7627 size += req->links[i].elems_len; 7628 7629 /* FIXME: no support for 4-addr MLO yet */ 7630 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7631 return -EOPNOTSUPP; 7632 7633 assoc_data = kzalloc(size, GFP_KERNEL); 7634 if (!assoc_data) 7635 return -ENOMEM; 7636 7637 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7638 7639 rcu_read_lock(); 7640 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7641 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7642 rcu_read_unlock(); 7643 kfree(assoc_data); 7644 return -EINVAL; 7645 } 7646 7647 csa_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_CHANNEL_SWITCH); 7648 ecsa_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_EXT_CHANSWITCH_ANN); 7649 if ((csa_elem && 7650 csa_elem->datalen == sizeof(struct ieee80211_channel_sw_ie) && 7651 ((struct ieee80211_channel_sw_ie *)csa_elem->data)->count != 0) || 7652 (ecsa_elem && 7653 ecsa_elem->datalen == sizeof(struct ieee80211_ext_chansw_ie) && 7654 ((struct ieee80211_ext_chansw_ie *)ecsa_elem->data)->count != 0)) { 7655 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 7656 rcu_read_unlock(); 7657 kfree(assoc_data); 7658 return -EINVAL; 7659 } 7660 7661 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7662 assoc_data->ssid_len = ssid_elem->datalen; 7663 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7664 vif_cfg->ssid_len = assoc_data->ssid_len; 7665 rcu_read_unlock(); 7666 7667 if (req->ap_mld_addr) { 7668 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7669 if (!req->links[i].bss) 7670 continue; 7671 link = sdata_dereference(sdata->link[i], sdata); 7672 if (link) 7673 ether_addr_copy(assoc_data->link[i].addr, 7674 link->conf->addr); 7675 else 7676 eth_random_addr(assoc_data->link[i].addr); 7677 } 7678 } else { 7679 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7680 } 7681 7682 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7683 7684 memcpy(assoc_data->ap_addr, 7685 req->ap_mld_addr ?: req->bss->bssid, 7686 ETH_ALEN); 7687 7688 if (ifmgd->associated) { 7689 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7690 7691 sdata_info(sdata, 7692 "disconnect from AP %pM for new assoc to %pM\n", 7693 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7694 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7695 WLAN_REASON_UNSPECIFIED, 7696 false, frame_buf); 7697 7698 ieee80211_report_disconnect(sdata, frame_buf, 7699 sizeof(frame_buf), true, 7700 WLAN_REASON_UNSPECIFIED, 7701 false); 7702 } 7703 7704 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7705 err = -EBUSY; 7706 goto err_free; 7707 } 7708 7709 if (ifmgd->assoc_data) { 7710 err = -EBUSY; 7711 goto err_free; 7712 } 7713 7714 if (ifmgd->auth_data) { 7715 bool match; 7716 7717 /* keep sta info, bssid if matching */ 7718 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7719 assoc_data->ap_addr) && 7720 ifmgd->auth_data->link_id == req->link_id; 7721 ieee80211_destroy_auth_data(sdata, match); 7722 } 7723 7724 /* prepare assoc data */ 7725 7726 bss = (void *)cbss->priv; 7727 assoc_data->wmm = bss->wmm_used && 7728 (local->hw.queues >= IEEE80211_NUM_ACS); 7729 7730 /* 7731 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7732 * We still associate in non-HT mode (11a/b/g) if any one of these 7733 * ciphers is configured as pairwise. 7734 * We can set this to true for non-11n hardware, that'll be checked 7735 * separately along with the peer capabilities. 7736 */ 7737 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7738 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7739 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7740 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7741 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7742 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7743 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7744 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7745 netdev_info(sdata->dev, 7746 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7747 } 7748 } 7749 7750 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7751 if (!bss->wmm_used) { 7752 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7753 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7754 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7755 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7756 netdev_info(sdata->dev, 7757 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7758 } 7759 7760 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7761 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7762 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7763 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7764 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7765 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7766 } 7767 7768 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7769 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7770 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7771 } 7772 7773 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7774 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7775 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7776 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7777 } 7778 7779 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7780 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7781 7782 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7783 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7784 sizeof(ifmgd->ht_capa_mask)); 7785 7786 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7787 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7788 sizeof(ifmgd->vht_capa_mask)); 7789 7790 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7791 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7792 sizeof(ifmgd->s1g_capa_mask)); 7793 7794 if (req->ie && req->ie_len) { 7795 memcpy(assoc_data->ie, req->ie, req->ie_len); 7796 assoc_data->ie_len = req->ie_len; 7797 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7798 } else { 7799 assoc_data->ie_pos = assoc_data->ie; 7800 } 7801 7802 if (req->fils_kek) { 7803 /* should already be checked in cfg80211 - so warn */ 7804 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7805 err = -EINVAL; 7806 goto err_free; 7807 } 7808 memcpy(assoc_data->fils_kek, req->fils_kek, 7809 req->fils_kek_len); 7810 assoc_data->fils_kek_len = req->fils_kek_len; 7811 } 7812 7813 if (req->fils_nonces) 7814 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7815 2 * FILS_NONCE_LEN); 7816 7817 /* default timeout */ 7818 assoc_data->timeout = jiffies; 7819 assoc_data->timeout_started = true; 7820 7821 assoc_data->assoc_link_id = assoc_link_id; 7822 7823 if (req->ap_mld_addr) { 7824 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7825 assoc_data->link[i].conn_flags = conn_flags; 7826 assoc_data->link[i].bss = req->links[i].bss; 7827 assoc_data->link[i].disabled = req->links[i].disabled; 7828 } 7829 7830 /* if there was no authentication, set up the link */ 7831 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 7832 if (err) 7833 goto err_clear; 7834 } else { 7835 assoc_data->link[0].conn_flags = conn_flags; 7836 assoc_data->link[0].bss = cbss; 7837 } 7838 7839 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7840 if (WARN_ON(!link)) { 7841 err = -EINVAL; 7842 goto err_clear; 7843 } 7844 7845 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7846 conn_flags |= link->u.mgd.conn_flags; 7847 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7848 conn_flags, assoc_link_id); 7849 override = link->u.mgd.conn_flags != conn_flags; 7850 link->u.mgd.conn_flags |= conn_flags; 7851 7852 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7853 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7854 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7855 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7856 7857 if (bss->wmm_used && bss->uapsd_supported && 7858 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7859 assoc_data->uapsd = true; 7860 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7861 } else { 7862 assoc_data->uapsd = false; 7863 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7864 } 7865 7866 if (req->prev_bssid) 7867 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7868 7869 if (req->use_mfp) { 7870 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7871 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7872 } else { 7873 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7874 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7875 } 7876 7877 if (req->flags & ASSOC_REQ_USE_RRM) 7878 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7879 else 7880 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7881 7882 if (req->crypto.control_port) 7883 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7884 else 7885 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7886 7887 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7888 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7889 sdata->control_port_over_nl80211 = 7890 req->crypto.control_port_over_nl80211; 7891 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7892 7893 /* kick off associate process */ 7894 ifmgd->assoc_data = assoc_data; 7895 7896 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7897 if (!assoc_data->link[i].bss) 7898 continue; 7899 if (i == assoc_data->assoc_link_id) 7900 continue; 7901 /* only calculate the flags, hence link == NULL */ 7902 err = ieee80211_prep_channel(sdata, NULL, 7903 assoc_data->link[i].bss, true, 7904 &assoc_data->link[i].conn_flags); 7905 if (err) { 7906 req->links[i].error = err; 7907 goto err_clear; 7908 } 7909 } 7910 7911 /* needed for transmitting the assoc frames properly */ 7912 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7913 7914 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7915 req->ap_mld_addr, true, override); 7916 if (err) 7917 goto err_clear; 7918 7919 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7920 link->u.mgd.conn_flags; 7921 7922 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7923 const struct cfg80211_bss_ies *beacon_ies; 7924 7925 rcu_read_lock(); 7926 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7927 7928 if (beacon_ies) { 7929 /* 7930 * Wait up to one beacon interval ... 7931 * should this be more if we miss one? 7932 */ 7933 sdata_info(sdata, "waiting for beacon from %pM\n", 7934 link->u.mgd.bssid); 7935 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7936 assoc_data->timeout_started = true; 7937 assoc_data->need_beacon = true; 7938 } 7939 rcu_read_unlock(); 7940 } 7941 7942 run_again(sdata, assoc_data->timeout); 7943 7944 return 0; 7945 err_clear: 7946 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7947 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7948 BSS_CHANGED_BSSID); 7949 ifmgd->assoc_data = NULL; 7950 err_free: 7951 kfree(assoc_data); 7952 return err; 7953 } 7954 7955 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7956 struct cfg80211_deauth_request *req) 7957 { 7958 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7959 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7960 bool tx = !req->local_state_change; 7961 struct ieee80211_prep_tx_info info = { 7962 .subtype = IEEE80211_STYPE_DEAUTH, 7963 }; 7964 7965 if (ifmgd->auth_data && 7966 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7967 sdata_info(sdata, 7968 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7969 req->bssid, req->reason_code, 7970 ieee80211_get_reason_code_string(req->reason_code)); 7971 7972 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7973 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7974 IEEE80211_STYPE_DEAUTH, 7975 req->reason_code, tx, 7976 frame_buf); 7977 ieee80211_destroy_auth_data(sdata, false); 7978 ieee80211_report_disconnect(sdata, frame_buf, 7979 sizeof(frame_buf), true, 7980 req->reason_code, false); 7981 drv_mgd_complete_tx(sdata->local, sdata, &info); 7982 return 0; 7983 } 7984 7985 if (ifmgd->assoc_data && 7986 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7987 sdata_info(sdata, 7988 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7989 req->bssid, req->reason_code, 7990 ieee80211_get_reason_code_string(req->reason_code)); 7991 7992 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7993 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7994 IEEE80211_STYPE_DEAUTH, 7995 req->reason_code, tx, 7996 frame_buf); 7997 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7998 ieee80211_report_disconnect(sdata, frame_buf, 7999 sizeof(frame_buf), true, 8000 req->reason_code, false); 8001 return 0; 8002 } 8003 8004 if (ifmgd->associated && 8005 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 8006 sdata_info(sdata, 8007 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 8008 req->bssid, req->reason_code, 8009 ieee80211_get_reason_code_string(req->reason_code)); 8010 8011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8012 req->reason_code, tx, frame_buf); 8013 ieee80211_report_disconnect(sdata, frame_buf, 8014 sizeof(frame_buf), true, 8015 req->reason_code, false); 8016 drv_mgd_complete_tx(sdata->local, sdata, &info); 8017 return 0; 8018 } 8019 8020 return -ENOTCONN; 8021 } 8022 8023 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 8024 struct cfg80211_disassoc_request *req) 8025 { 8026 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8027 8028 if (!sdata->u.mgd.associated || 8029 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 8030 return -ENOTCONN; 8031 8032 sdata_info(sdata, 8033 "disassociating from %pM by local choice (Reason: %u=%s)\n", 8034 req->ap_addr, req->reason_code, 8035 ieee80211_get_reason_code_string(req->reason_code)); 8036 8037 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 8038 req->reason_code, !req->local_state_change, 8039 frame_buf); 8040 8041 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8042 req->reason_code, false); 8043 8044 return 0; 8045 } 8046 8047 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 8048 { 8049 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8050 &link->u.mgd.request_smps_work); 8051 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8052 &link->u.mgd.recalc_smps); 8053 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 8054 &link->u.mgd.chswitch_work); 8055 } 8056 8057 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 8058 { 8059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8060 8061 /* 8062 * Make sure some work items will not run after this, 8063 * they will not do anything but might not have been 8064 * cancelled when disconnecting. 8065 */ 8066 wiphy_work_cancel(sdata->local->hw.wiphy, 8067 &ifmgd->monitor_work); 8068 wiphy_work_cancel(sdata->local->hw.wiphy, 8069 &ifmgd->beacon_connection_loss_work); 8070 wiphy_work_cancel(sdata->local->hw.wiphy, 8071 &ifmgd->csa_connection_drop_work); 8072 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8073 &ifmgd->tdls_peer_del_work); 8074 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8075 &ifmgd->ml_reconf_work); 8076 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 8077 8078 if (ifmgd->assoc_data) 8079 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8080 if (ifmgd->auth_data) 8081 ieee80211_destroy_auth_data(sdata, false); 8082 spin_lock_bh(&ifmgd->teardown_lock); 8083 if (ifmgd->teardown_skb) { 8084 kfree_skb(ifmgd->teardown_skb); 8085 ifmgd->teardown_skb = NULL; 8086 ifmgd->orig_teardown_skb = NULL; 8087 } 8088 kfree(ifmgd->assoc_req_ies); 8089 ifmgd->assoc_req_ies = NULL; 8090 ifmgd->assoc_req_ies_len = 0; 8091 spin_unlock_bh(&ifmgd->teardown_lock); 8092 del_timer_sync(&ifmgd->timer); 8093 } 8094 8095 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 8096 enum nl80211_cqm_rssi_threshold_event rssi_event, 8097 s32 rssi_level, 8098 gfp_t gfp) 8099 { 8100 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8101 8102 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 8103 8104 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 8105 } 8106 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 8107 8108 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 8109 { 8110 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8111 8112 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 8113 8114 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 8115 } 8116 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 8117 8118 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 8119 int rssi_min_thold, 8120 int rssi_max_thold) 8121 { 8122 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 8123 8124 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 8125 return; 8126 8127 /* 8128 * Scale up threshold values before storing it, as the RSSI averaging 8129 * algorithm uses a scaled up value as well. Change this scaling 8130 * factor if the RSSI averaging algorithm changes. 8131 */ 8132 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 8133 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 8134 } 8135 8136 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 8137 int rssi_min_thold, 8138 int rssi_max_thold) 8139 { 8140 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8141 8142 WARN_ON(rssi_min_thold == rssi_max_thold || 8143 rssi_min_thold > rssi_max_thold); 8144 8145 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 8146 rssi_max_thold); 8147 } 8148 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 8149 8150 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 8151 { 8152 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8153 8154 _ieee80211_enable_rssi_reports(sdata, 0, 0); 8155 } 8156 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 8157