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 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 48 49 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 50 51 static int max_nullfunc_tries = 2; 52 module_param(max_nullfunc_tries, int, 0644); 53 MODULE_PARM_DESC(max_nullfunc_tries, 54 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 55 56 static int max_probe_tries = 5; 57 module_param(max_probe_tries, int, 0644); 58 MODULE_PARM_DESC(max_probe_tries, 59 "Maximum probe tries before disconnecting (reason 4)."); 60 61 /* 62 * Beacon loss timeout is calculated as N frames times the 63 * advertised beacon interval. This may need to be somewhat 64 * higher than what hardware might detect to account for 65 * delays in the host processing frames. But since we also 66 * probe on beacon miss before declaring the connection lost 67 * default to what we want. 68 */ 69 static int beacon_loss_count = 7; 70 module_param(beacon_loss_count, int, 0644); 71 MODULE_PARM_DESC(beacon_loss_count, 72 "Number of beacon intervals before we decide beacon was lost."); 73 74 /* 75 * Time the connection can be idle before we probe 76 * it to see if we can still talk to the AP. 77 */ 78 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 79 /* 80 * Time we wait for a probe response after sending 81 * a probe request because of beacon loss or for 82 * checking the connection still works. 83 */ 84 static int probe_wait_ms = 500; 85 module_param(probe_wait_ms, int, 0644); 86 MODULE_PARM_DESC(probe_wait_ms, 87 "Maximum time(ms) to wait for probe response" 88 " before disconnecting (reason 4)."); 89 90 /* 91 * How many Beacon frames need to have been used in average signal strength 92 * before starting to indicate signal change events. 93 */ 94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 95 96 /* 97 * Extract from the given disabled subchannel bitmap (raw format 98 * from the EHT Operation Element) the bits for the subchannel 99 * we're using right now. 100 */ 101 static u16 102 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, 103 struct cfg80211_chan_def *chandef, u16 bitmap) 104 { 105 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 106 struct cfg80211_chan_def ap_chandef = *chandef; 107 u32 ap_center_freq, local_center_freq; 108 u32 ap_bw, local_bw; 109 int ap_start_freq, local_start_freq; 110 u16 shift, mask; 111 112 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || 113 !(eht_oper->params & 114 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) 115 return 0; 116 117 /* set 160/320 supported to get the full AP definition */ 118 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 119 true, true, &ap_chandef); 120 ap_center_freq = ap_chandef.center_freq1; 121 ap_bw = 20 * BIT(u8_get_bits(info->control, 122 IEEE80211_EHT_OPER_CHAN_WIDTH)); 123 ap_start_freq = ap_center_freq - ap_bw / 2; 124 local_center_freq = chandef->center_freq1; 125 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 126 local_start_freq = local_center_freq - local_bw / 2; 127 shift = (local_start_freq - ap_start_freq) / 20; 128 mask = BIT(local_bw / 20) - 1; 129 130 return (bitmap >> shift) & mask; 131 } 132 133 /* 134 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 135 * valid bitmap. 136 */ 137 static void 138 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 139 const struct ieee80211_eht_operation *eht_oper, 140 u16 bitmap, u64 *changed) 141 { 142 struct cfg80211_chan_def *chandef = &link->conf->chandef; 143 struct ieee80211_local *local = link->sdata->local; 144 u16 extracted; 145 u64 _changed = 0; 146 147 if (!changed) 148 changed = &_changed; 149 150 while (chandef->width > NL80211_CHAN_WIDTH_40) { 151 extracted = 152 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 153 bitmap); 154 155 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 156 chandef) && 157 !(bitmap && ieee80211_hw_check(&local->hw, 158 DISALLOW_PUNCTURING))) 159 break; 160 link->u.mgd.conn_flags |= 161 ieee80211_chandef_downgrade(chandef); 162 *changed |= BSS_CHANGED_BANDWIDTH; 163 } 164 165 if (chandef->width <= NL80211_CHAN_WIDTH_40) 166 extracted = 0; 167 168 if (link->conf->eht_puncturing != extracted) { 169 link->conf->eht_puncturing = extracted; 170 *changed |= BSS_CHANGED_EHT_PUNCTURING; 171 } 172 } 173 174 /* 175 * We can have multiple work items (and connection probing) 176 * scheduling this timer, but we need to take care to only 177 * reschedule it when it should fire _earlier_ than it was 178 * asked for before, or if it's not pending right now. This 179 * function ensures that. Note that it then is required to 180 * run this function for all timeouts after the first one 181 * has happened -- the work that runs from this timer will 182 * do that. 183 */ 184 static void run_again(struct ieee80211_sub_if_data *sdata, 185 unsigned long timeout) 186 { 187 lockdep_assert_wiphy(sdata->local->hw.wiphy); 188 189 if (!timer_pending(&sdata->u.mgd.timer) || 190 time_before(timeout, sdata->u.mgd.timer.expires)) 191 mod_timer(&sdata->u.mgd.timer, timeout); 192 } 193 194 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 195 { 196 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 197 return; 198 199 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 200 return; 201 202 mod_timer(&sdata->u.mgd.bcn_mon_timer, 203 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 204 } 205 206 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 207 { 208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 209 210 if (unlikely(!ifmgd->associated)) 211 return; 212 213 if (ifmgd->probe_send_count) 214 ifmgd->probe_send_count = 0; 215 216 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 217 return; 218 219 mod_timer(&ifmgd->conn_mon_timer, 220 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 221 } 222 223 static int ecw2cw(int ecw) 224 { 225 return (1 << ecw) - 1; 226 } 227 228 static ieee80211_conn_flags_t 229 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 230 struct ieee80211_link_data *link, 231 ieee80211_conn_flags_t conn_flags, 232 struct ieee80211_supported_band *sband, 233 struct ieee80211_channel *channel, 234 u32 vht_cap_info, 235 const struct ieee80211_ht_operation *ht_oper, 236 const struct ieee80211_vht_operation *vht_oper, 237 const struct ieee80211_he_operation *he_oper, 238 const struct ieee80211_eht_operation *eht_oper, 239 const struct ieee80211_s1g_oper_ie *s1g_oper, 240 struct cfg80211_chan_def *chandef, bool tracking) 241 { 242 struct cfg80211_chan_def vht_chandef; 243 struct ieee80211_sta_ht_cap sta_ht_cap; 244 ieee80211_conn_flags_t ret; 245 u32 ht_cfreq; 246 247 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 248 chandef->chan = channel; 249 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 250 chandef->center_freq1 = channel->center_freq; 251 chandef->freq1_offset = channel->freq_offset; 252 253 if (channel->band == NL80211_BAND_6GHZ) { 254 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 255 chandef)) { 256 mlme_dbg(sdata, 257 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 258 ret = IEEE80211_CONN_DISABLE_HT | 259 IEEE80211_CONN_DISABLE_VHT | 260 IEEE80211_CONN_DISABLE_HE | 261 IEEE80211_CONN_DISABLE_EHT; 262 } else { 263 ret = 0; 264 } 265 vht_chandef = *chandef; 266 goto out; 267 } else if (sband->band == NL80211_BAND_S1GHZ) { 268 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 269 sdata_info(sdata, 270 "Missing S1G Operation Element? Trying operating == primary\n"); 271 chandef->width = ieee80211_s1g_channel_width(channel); 272 } 273 274 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 275 IEEE80211_CONN_DISABLE_VHT | 276 IEEE80211_CONN_DISABLE_80P80MHZ | 277 IEEE80211_CONN_DISABLE_160MHZ; 278 goto out; 279 } 280 281 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 282 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 283 284 if (!ht_oper || !sta_ht_cap.ht_supported) { 285 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 286 ret = IEEE80211_CONN_DISABLE_HT | 287 IEEE80211_CONN_DISABLE_VHT | 288 IEEE80211_CONN_DISABLE_HE | 289 IEEE80211_CONN_DISABLE_EHT; 290 goto out; 291 } 292 293 chandef->width = NL80211_CHAN_WIDTH_20; 294 295 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 296 channel->band); 297 /* check that channel matches the right operating channel */ 298 if (!tracking && channel->center_freq != ht_cfreq) { 299 /* 300 * It's possible that some APs are confused here; 301 * Netgear WNDR3700 sometimes reports 4 higher than 302 * the actual channel in association responses, but 303 * since we look at probe response/beacon data here 304 * it should be OK. 305 */ 306 sdata_info(sdata, 307 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 308 channel->center_freq, ht_cfreq, 309 ht_oper->primary_chan, channel->band); 310 ret = IEEE80211_CONN_DISABLE_HT | 311 IEEE80211_CONN_DISABLE_VHT | 312 IEEE80211_CONN_DISABLE_HE | 313 IEEE80211_CONN_DISABLE_EHT; 314 goto out; 315 } 316 317 /* check 40 MHz support, if we have it */ 318 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 319 ieee80211_chandef_ht_oper(ht_oper, chandef); 320 } else { 321 mlme_dbg(sdata, "40 MHz not supported\n"); 322 /* 40 MHz (and 80 MHz) must be supported for VHT */ 323 ret = IEEE80211_CONN_DISABLE_VHT; 324 /* also mark 40 MHz disabled */ 325 ret |= IEEE80211_CONN_DISABLE_40MHZ; 326 goto out; 327 } 328 329 if (!vht_oper || !sband->vht_cap.vht_supported) { 330 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 331 ret = IEEE80211_CONN_DISABLE_VHT; 332 goto out; 333 } 334 335 vht_chandef = *chandef; 336 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 337 he_oper && 338 (le32_to_cpu(he_oper->he_oper_params) & 339 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 340 struct ieee80211_vht_operation he_oper_vht_cap; 341 342 /* 343 * Set only first 3 bytes (other 2 aren't used in 344 * ieee80211_chandef_vht_oper() anyway) 345 */ 346 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 347 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 348 349 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 350 &he_oper_vht_cap, ht_oper, 351 &vht_chandef)) { 352 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 353 sdata_info(sdata, 354 "HE AP VHT information is invalid, disabling HE\n"); 355 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 356 goto out; 357 } 358 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 359 vht_cap_info, 360 vht_oper, ht_oper, 361 &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_valid(&vht_chandef)) { 370 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 371 sdata_info(sdata, 372 "AP VHT information is invalid, disabling VHT\n"); 373 ret = IEEE80211_CONN_DISABLE_VHT; 374 goto out; 375 } 376 377 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 378 ret = 0; 379 goto out; 380 } 381 382 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 383 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 384 sdata_info(sdata, 385 "AP VHT information doesn't match HT, disabling VHT\n"); 386 ret = IEEE80211_CONN_DISABLE_VHT; 387 goto out; 388 } 389 390 *chandef = vht_chandef; 391 392 /* 393 * handle the case that the EHT operation indicates that it holds EHT 394 * operation information (in case that the channel width differs from 395 * the channel width reported in HT/VHT/HE). 396 */ 397 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 398 struct cfg80211_chan_def eht_chandef = *chandef; 399 400 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 401 eht_chandef.width == 402 NL80211_CHAN_WIDTH_160, 403 false, &eht_chandef); 404 405 if (!cfg80211_chandef_valid(&eht_chandef)) { 406 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 407 sdata_info(sdata, 408 "AP EHT information is invalid, disabling EHT\n"); 409 ret = IEEE80211_CONN_DISABLE_EHT; 410 goto out; 411 } 412 413 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 414 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 415 sdata_info(sdata, 416 "AP EHT information is incompatible, disabling EHT\n"); 417 ret = IEEE80211_CONN_DISABLE_EHT; 418 goto out; 419 } 420 421 *chandef = eht_chandef; 422 } 423 424 ret = 0; 425 426 out: 427 /* 428 * When tracking the current AP, don't do any further checks if the 429 * new chandef is identical to the one we're currently using for the 430 * connection. This keeps us from playing ping-pong with regulatory, 431 * without it the following can happen (for example): 432 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 433 * - AP advertises regdom US 434 * - CRDA loads regdom US with 80 MHz prohibited (old database) 435 * - the code below detects an unsupported channel, downgrades, and 436 * we disconnect from the AP in the caller 437 * - disconnect causes CRDA to reload world regdomain and the game 438 * starts anew. 439 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 440 * 441 * It seems possible that there are still scenarios with CSA or real 442 * bandwidth changes where a this could happen, but those cases are 443 * less common and wouldn't completely prevent using the AP. 444 */ 445 if (tracking && 446 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 447 return ret; 448 449 /* don't print the message below for VHT mismatch if VHT is disabled */ 450 if (ret & IEEE80211_CONN_DISABLE_VHT) 451 vht_chandef = *chandef; 452 453 /* 454 * Ignore the DISABLED flag when we're already connected and only 455 * tracking the APs beacon for bandwidth changes - otherwise we 456 * might get disconnected here if we connect to an AP, update our 457 * regulatory information based on the AP's country IE and the 458 * information we have is wrong/outdated and disables the channel 459 * that we're actually using for the connection to the AP. 460 */ 461 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 462 tracking ? 0 : 463 IEEE80211_CHAN_DISABLED)) { 464 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 465 ret = IEEE80211_CONN_DISABLE_HT | 466 IEEE80211_CONN_DISABLE_VHT | 467 IEEE80211_CONN_DISABLE_HE | 468 IEEE80211_CONN_DISABLE_EHT; 469 break; 470 } 471 472 ret |= ieee80211_chandef_downgrade(chandef); 473 } 474 475 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 476 IEEE80211_CHAN_NO_HE)) 477 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 478 479 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 480 IEEE80211_CHAN_NO_EHT)) 481 ret |= IEEE80211_CONN_DISABLE_EHT; 482 483 if (chandef->width != vht_chandef.width && !tracking) 484 sdata_info(sdata, 485 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 486 487 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 488 return ret; 489 } 490 491 static int ieee80211_config_bw(struct ieee80211_link_data *link, 492 struct ieee802_11_elems *elems, 493 const u8 *bssid, u64 *changed) 494 { 495 const struct ieee80211_vht_cap *vht_cap = elems->vht_cap_elem; 496 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 497 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 498 const struct ieee80211_he_operation *he_oper = elems->he_operation; 499 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 500 const struct ieee80211_s1g_oper_ie *s1g_oper = elems->s1g_oper; 501 struct ieee80211_sub_if_data *sdata = link->sdata; 502 struct ieee80211_local *local = sdata->local; 503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 504 struct ieee80211_channel *chan = link->conf->chandef.chan; 505 struct ieee80211_supported_band *sband = 506 local->hw.wiphy->bands[chan->band]; 507 struct cfg80211_chan_def chandef; 508 u16 ht_opmode; 509 ieee80211_conn_flags_t flags; 510 u32 vht_cap_info = 0; 511 int ret; 512 513 /* if HT was/is disabled, don't track any bandwidth changes */ 514 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 515 return 0; 516 517 /* don't check VHT if we associated as non-VHT station */ 518 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 519 vht_oper = NULL; 520 521 /* don't check HE if we associated as non-HE station */ 522 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 523 !ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 524 he_oper = NULL; 525 eht_oper = NULL; 526 } 527 528 /* don't check EHT if we associated as non-EHT station */ 529 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 530 !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) 531 eht_oper = NULL; 532 533 /* 534 * if bss configuration changed store the new one - 535 * this may be applicable even if channel is identical 536 */ 537 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 538 if (link->conf->ht_operation_mode != ht_opmode) { 539 *changed |= BSS_CHANGED_HT; 540 link->conf->ht_operation_mode = ht_opmode; 541 } 542 543 if (vht_cap) 544 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 545 546 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 547 flags = ieee80211_determine_chantype(sdata, link, 548 link->u.mgd.conn_flags, 549 sband, chan, vht_cap_info, 550 ht_oper, vht_oper, 551 he_oper, eht_oper, 552 s1g_oper, &chandef, true); 553 554 /* 555 * Downgrade the new channel if we associated with restricted 556 * capabilities. For example, if we associated as a 20 MHz STA 557 * to a 40 MHz AP (due to regulatory, capabilities or config 558 * reasons) then switching to a 40 MHz channel now won't do us 559 * any good -- we couldn't use it with the AP. 560 */ 561 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 562 chandef.width == NL80211_CHAN_WIDTH_80P80) 563 flags |= ieee80211_chandef_downgrade(&chandef); 564 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 565 chandef.width == NL80211_CHAN_WIDTH_160) 566 flags |= ieee80211_chandef_downgrade(&chandef); 567 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 568 chandef.width > NL80211_CHAN_WIDTH_20) 569 flags |= ieee80211_chandef_downgrade(&chandef); 570 571 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 572 return 0; 573 574 link_info(link, 575 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 576 link->u.mgd.bssid, chandef.chan->center_freq, 577 chandef.chan->freq_offset, chandef.width, 578 chandef.center_freq1, chandef.freq1_offset, 579 chandef.center_freq2); 580 581 if (flags != (link->u.mgd.conn_flags & 582 (IEEE80211_CONN_DISABLE_HT | 583 IEEE80211_CONN_DISABLE_VHT | 584 IEEE80211_CONN_DISABLE_HE | 585 IEEE80211_CONN_DISABLE_EHT | 586 IEEE80211_CONN_DISABLE_40MHZ | 587 IEEE80211_CONN_DISABLE_80P80MHZ | 588 IEEE80211_CONN_DISABLE_160MHZ | 589 IEEE80211_CONN_DISABLE_320MHZ)) || 590 !cfg80211_chandef_valid(&chandef)) { 591 sdata_info(sdata, 592 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 593 link->u.mgd.bssid, flags, ifmgd->flags); 594 return -EINVAL; 595 } 596 597 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 598 599 if (ret) { 600 sdata_info(sdata, 601 "AP %pM changed bandwidth to incompatible one - disconnect\n", 602 link->u.mgd.bssid); 603 return ret; 604 } 605 606 cfg80211_schedule_channels_check(&sdata->wdev); 607 return 0; 608 } 609 610 /* frame sending functions */ 611 612 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 613 struct sk_buff *skb, u8 ap_ht_param, 614 struct ieee80211_supported_band *sband, 615 struct ieee80211_channel *channel, 616 enum ieee80211_smps_mode smps, 617 ieee80211_conn_flags_t conn_flags) 618 { 619 u8 *pos; 620 u32 flags = channel->flags; 621 u16 cap; 622 struct ieee80211_sta_ht_cap ht_cap; 623 624 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 625 626 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 627 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 628 629 /* determine capability flags */ 630 cap = ht_cap.cap; 631 632 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 633 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 634 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 635 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 636 cap &= ~IEEE80211_HT_CAP_SGI_40; 637 } 638 break; 639 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 640 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 641 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 642 cap &= ~IEEE80211_HT_CAP_SGI_40; 643 } 644 break; 645 } 646 647 /* 648 * If 40 MHz was disabled associate as though we weren't 649 * capable of 40 MHz -- some broken APs will never fall 650 * back to trying to transmit in 20 MHz. 651 */ 652 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 653 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 654 cap &= ~IEEE80211_HT_CAP_SGI_40; 655 } 656 657 /* set SM PS mode properly */ 658 cap &= ~IEEE80211_HT_CAP_SM_PS; 659 switch (smps) { 660 case IEEE80211_SMPS_AUTOMATIC: 661 case IEEE80211_SMPS_NUM_MODES: 662 WARN_ON(1); 663 fallthrough; 664 case IEEE80211_SMPS_OFF: 665 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 666 IEEE80211_HT_CAP_SM_PS_SHIFT; 667 break; 668 case IEEE80211_SMPS_STATIC: 669 cap |= WLAN_HT_CAP_SM_PS_STATIC << 670 IEEE80211_HT_CAP_SM_PS_SHIFT; 671 break; 672 case IEEE80211_SMPS_DYNAMIC: 673 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 674 IEEE80211_HT_CAP_SM_PS_SHIFT; 675 break; 676 } 677 678 /* reserve and fill IE */ 679 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 680 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 681 } 682 683 /* This function determines vht capability flags for the association 684 * and builds the IE. 685 * Note - the function returns true to own the MU-MIMO capability 686 */ 687 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 688 struct sk_buff *skb, 689 struct ieee80211_supported_band *sband, 690 struct ieee80211_vht_cap *ap_vht_cap, 691 ieee80211_conn_flags_t conn_flags) 692 { 693 struct ieee80211_local *local = sdata->local; 694 u8 *pos; 695 u32 cap; 696 struct ieee80211_sta_vht_cap vht_cap; 697 u32 mask, ap_bf_sts, our_bf_sts; 698 bool mu_mimo_owner = false; 699 700 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 701 702 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 703 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 704 705 /* determine capability flags */ 706 cap = vht_cap.cap; 707 708 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 709 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 710 711 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 712 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 713 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 714 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 715 } 716 717 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 718 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 719 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 720 } 721 722 /* 723 * Some APs apparently get confused if our capabilities are better 724 * than theirs, so restrict what we advertise in the assoc request. 725 */ 726 if (!(ap_vht_cap->vht_cap_info & 727 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 728 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 729 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 730 else if (!(ap_vht_cap->vht_cap_info & 731 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 732 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 733 734 /* 735 * If some other vif is using the MU-MIMO capability we cannot associate 736 * using MU-MIMO - this will lead to contradictions in the group-id 737 * mechanism. 738 * Ownership is defined since association request, in order to avoid 739 * simultaneous associations with MU-MIMO. 740 */ 741 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 742 bool disable_mu_mimo = false; 743 struct ieee80211_sub_if_data *other; 744 745 list_for_each_entry_rcu(other, &local->interfaces, list) { 746 if (other->vif.bss_conf.mu_mimo_owner) { 747 disable_mu_mimo = true; 748 break; 749 } 750 } 751 if (disable_mu_mimo) 752 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 753 else 754 mu_mimo_owner = true; 755 } 756 757 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 758 759 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 760 our_bf_sts = cap & mask; 761 762 if (ap_bf_sts < our_bf_sts) { 763 cap &= ~mask; 764 cap |= ap_bf_sts; 765 } 766 767 /* reserve and fill IE */ 768 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 769 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 770 771 return mu_mimo_owner; 772 } 773 774 /* This function determines HE capability flags for the association 775 * and builds the IE. 776 */ 777 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 778 struct sk_buff *skb, 779 struct ieee80211_supported_band *sband, 780 enum ieee80211_smps_mode smps_mode, 781 ieee80211_conn_flags_t conn_flags) 782 { 783 u8 *pos, *pre_he_pos; 784 const struct ieee80211_sta_he_cap *he_cap; 785 u8 he_cap_size; 786 787 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 788 if (WARN_ON(!he_cap)) 789 return; 790 791 /* get a max size estimate */ 792 he_cap_size = 793 2 + 1 + sizeof(he_cap->he_cap_elem) + 794 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 795 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 796 he_cap->he_cap_elem.phy_cap_info); 797 pos = skb_put(skb, he_cap_size); 798 pre_he_pos = pos; 799 pos = ieee80211_ie_build_he_cap(conn_flags, 800 pos, he_cap, pos + he_cap_size); 801 /* trim excess if any */ 802 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 803 804 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 805 } 806 807 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 808 struct sk_buff *skb, 809 struct ieee80211_supported_band *sband) 810 { 811 u8 *pos; 812 const struct ieee80211_sta_he_cap *he_cap; 813 const struct ieee80211_sta_eht_cap *eht_cap; 814 u8 eht_cap_size; 815 816 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 817 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 818 819 /* 820 * EHT capabilities element is only added if the HE capabilities element 821 * was added so assume that 'he_cap' is valid and don't check it. 822 */ 823 if (WARN_ON(!he_cap || !eht_cap)) 824 return; 825 826 eht_cap_size = 827 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 828 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 829 &eht_cap->eht_cap_elem, 830 false) + 831 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 832 eht_cap->eht_cap_elem.phy_cap_info); 833 pos = skb_put(skb, eht_cap_size); 834 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 835 false); 836 } 837 838 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 839 enum nl80211_chan_width width, 840 struct ieee80211_supported_band *sband, 841 struct ieee80211_mgd_assoc_data *assoc_data) 842 { 843 unsigned int rates_len, supp_rates_len; 844 u32 rates = 0; 845 int i, count; 846 u8 *pos; 847 848 if (assoc_data->supp_rates_len) { 849 /* 850 * Get all rates supported by the device and the AP as 851 * some APs don't like getting a superset of their rates 852 * in the association request (e.g. D-Link DAP 1353 in 853 * b-only mode)... 854 */ 855 rates_len = ieee80211_parse_bitrates(width, sband, 856 assoc_data->supp_rates, 857 assoc_data->supp_rates_len, 858 &rates); 859 } else { 860 /* 861 * In case AP not provide any supported rates information 862 * before association, we send information element(s) with 863 * all rates that we support. 864 */ 865 rates_len = sband->n_bitrates; 866 for (i = 0; i < sband->n_bitrates; i++) 867 rates |= BIT(i); 868 } 869 870 supp_rates_len = rates_len; 871 if (supp_rates_len > 8) 872 supp_rates_len = 8; 873 874 pos = skb_put(skb, supp_rates_len + 2); 875 *pos++ = WLAN_EID_SUPP_RATES; 876 *pos++ = supp_rates_len; 877 878 count = 0; 879 for (i = 0; i < sband->n_bitrates; i++) { 880 if (BIT(i) & rates) { 881 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 882 *pos++ = (u8)rate; 883 if (++count == 8) 884 break; 885 } 886 } 887 888 if (rates_len > count) { 889 pos = skb_put(skb, rates_len - count + 2); 890 *pos++ = WLAN_EID_EXT_SUPP_RATES; 891 *pos++ = rates_len - count; 892 893 for (i++; i < sband->n_bitrates; i++) { 894 if (BIT(i) & rates) { 895 int rate; 896 897 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 898 *pos++ = (u8)rate; 899 } 900 } 901 } 902 } 903 904 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 905 const u8 *elems, 906 size_t elems_len, 907 size_t offset) 908 { 909 size_t noffset; 910 911 static const u8 before_ht[] = { 912 WLAN_EID_SSID, 913 WLAN_EID_SUPP_RATES, 914 WLAN_EID_EXT_SUPP_RATES, 915 WLAN_EID_PWR_CAPABILITY, 916 WLAN_EID_SUPPORTED_CHANNELS, 917 WLAN_EID_RSN, 918 WLAN_EID_QOS_CAPA, 919 WLAN_EID_RRM_ENABLED_CAPABILITIES, 920 WLAN_EID_MOBILITY_DOMAIN, 921 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 922 WLAN_EID_RIC_DATA, /* reassoc only */ 923 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 924 }; 925 static const u8 after_ric[] = { 926 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 927 WLAN_EID_HT_CAPABILITY, 928 WLAN_EID_BSS_COEX_2040, 929 /* luckily this is almost always there */ 930 WLAN_EID_EXT_CAPABILITY, 931 WLAN_EID_QOS_TRAFFIC_CAPA, 932 WLAN_EID_TIM_BCAST_REQ, 933 WLAN_EID_INTERWORKING, 934 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 935 WLAN_EID_VHT_CAPABILITY, 936 WLAN_EID_OPMODE_NOTIF, 937 }; 938 939 if (!elems_len) 940 return offset; 941 942 noffset = ieee80211_ie_split_ric(elems, elems_len, 943 before_ht, 944 ARRAY_SIZE(before_ht), 945 after_ric, 946 ARRAY_SIZE(after_ric), 947 offset); 948 skb_put_data(skb, elems + offset, noffset - offset); 949 950 return noffset; 951 } 952 953 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 954 const u8 *elems, 955 size_t elems_len, 956 size_t offset) 957 { 958 static const u8 before_vht[] = { 959 /* 960 * no need to list the ones split off before HT 961 * or generated here 962 */ 963 WLAN_EID_BSS_COEX_2040, 964 WLAN_EID_EXT_CAPABILITY, 965 WLAN_EID_QOS_TRAFFIC_CAPA, 966 WLAN_EID_TIM_BCAST_REQ, 967 WLAN_EID_INTERWORKING, 968 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 969 }; 970 size_t noffset; 971 972 if (!elems_len) 973 return offset; 974 975 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 976 noffset = ieee80211_ie_split(elems, elems_len, 977 before_vht, ARRAY_SIZE(before_vht), 978 offset); 979 skb_put_data(skb, elems + offset, noffset - offset); 980 981 return noffset; 982 } 983 984 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 985 const u8 *elems, 986 size_t elems_len, 987 size_t offset) 988 { 989 static const u8 before_he[] = { 990 /* 991 * no need to list the ones split off before VHT 992 * or generated here 993 */ 994 WLAN_EID_OPMODE_NOTIF, 995 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 996 /* 11ai elements */ 997 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 998 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 999 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1000 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1001 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1002 /* TODO: add 11ah/11aj/11ak elements */ 1003 }; 1004 size_t noffset; 1005 1006 if (!elems_len) 1007 return offset; 1008 1009 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1010 noffset = ieee80211_ie_split(elems, elems_len, 1011 before_he, ARRAY_SIZE(before_he), 1012 offset); 1013 skb_put_data(skb, elems + offset, noffset - offset); 1014 1015 return noffset; 1016 } 1017 1018 #define PRESENT_ELEMS_MAX 8 1019 #define PRESENT_ELEM_EXT_OFFS 0x100 1020 1021 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1022 struct sk_buff *skb, u16 capab, 1023 const struct element *ext_capa, 1024 const u16 *present_elems); 1025 1026 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1027 struct sk_buff *skb, u16 *capab, 1028 const struct element *ext_capa, 1029 const u8 *extra_elems, 1030 size_t extra_elems_len, 1031 unsigned int link_id, 1032 struct ieee80211_link_data *link, 1033 u16 *present_elems) 1034 { 1035 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1037 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1038 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1039 struct ieee80211_channel *chan = cbss->channel; 1040 const struct ieee80211_sband_iftype_data *iftd; 1041 struct ieee80211_local *local = sdata->local; 1042 struct ieee80211_supported_band *sband; 1043 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1044 struct ieee80211_chanctx_conf *chanctx_conf; 1045 enum ieee80211_smps_mode smps_mode; 1046 u16 orig_capab = *capab; 1047 size_t offset = 0; 1048 int present_elems_len = 0; 1049 u8 *pos; 1050 int i; 1051 1052 #define ADD_PRESENT_ELEM(id) do { \ 1053 /* need a last for termination - we use 0 == SSID */ \ 1054 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1055 present_elems[present_elems_len++] = (id); \ 1056 } while (0) 1057 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1058 1059 if (link) 1060 smps_mode = link->smps_mode; 1061 else if (sdata->u.mgd.powersave) 1062 smps_mode = IEEE80211_SMPS_DYNAMIC; 1063 else 1064 smps_mode = IEEE80211_SMPS_OFF; 1065 1066 if (link) { 1067 /* 1068 * 5/10 MHz scenarios are only viable without MLO, in which 1069 * case this pointer should be used ... All of this is a bit 1070 * unclear though, not sure this even works at all. 1071 */ 1072 rcu_read_lock(); 1073 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1074 if (chanctx_conf) 1075 width = chanctx_conf->def.width; 1076 rcu_read_unlock(); 1077 } 1078 1079 sband = local->hw.wiphy->bands[chan->band]; 1080 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1081 1082 if (sband->band == NL80211_BAND_2GHZ) { 1083 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1084 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1085 } 1086 1087 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1088 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1089 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1090 1091 if (sband->band != NL80211_BAND_S1GHZ) 1092 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1093 1094 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1095 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1096 struct cfg80211_chan_def chandef = { 1097 .width = width, 1098 .chan = chan, 1099 }; 1100 1101 pos = skb_put(skb, 4); 1102 *pos++ = WLAN_EID_PWR_CAPABILITY; 1103 *pos++ = 2; 1104 *pos++ = 0; /* min tx power */ 1105 /* max tx power */ 1106 *pos++ = ieee80211_chandef_max_power(&chandef); 1107 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1108 } 1109 1110 /* 1111 * Per spec, we shouldn't include the list of channels if we advertise 1112 * support for extended channel switching, but we've always done that; 1113 * (for now?) apply this restriction only on the (new) 6 GHz band. 1114 */ 1115 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1116 (sband->band != NL80211_BAND_6GHZ || 1117 !ext_capa || ext_capa->datalen < 1 || 1118 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1119 /* TODO: get this in reg domain format */ 1120 pos = skb_put(skb, 2 * sband->n_channels + 2); 1121 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1122 *pos++ = 2 * sband->n_channels; 1123 for (i = 0; i < sband->n_channels; i++) { 1124 int cf = sband->channels[i].center_freq; 1125 1126 *pos++ = ieee80211_frequency_to_channel(cf); 1127 *pos++ = 1; /* one channel in the subband*/ 1128 } 1129 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1130 } 1131 1132 /* if present, add any custom IEs that go before HT */ 1133 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1134 extra_elems_len, 1135 offset); 1136 1137 if (sband->band != NL80211_BAND_6GHZ && 1138 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1139 ieee80211_add_ht_ie(sdata, skb, 1140 assoc_data->link[link_id].ap_ht_param, 1141 sband, chan, smps_mode, 1142 assoc_data->link[link_id].conn_flags); 1143 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1144 } 1145 1146 /* if present, add any custom IEs that go before VHT */ 1147 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1148 extra_elems_len, 1149 offset); 1150 1151 if (sband->band != NL80211_BAND_6GHZ && 1152 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1153 bool mu_mimo_owner = 1154 ieee80211_add_vht_ie(sdata, skb, sband, 1155 &assoc_data->link[link_id].ap_vht_cap, 1156 assoc_data->link[link_id].conn_flags); 1157 1158 if (link) 1159 link->conf->mu_mimo_owner = mu_mimo_owner; 1160 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1161 } 1162 1163 /* 1164 * If AP doesn't support HT, mark HE and EHT as disabled. 1165 * If on the 5GHz band, make sure it supports VHT. 1166 */ 1167 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1168 (sband->band == NL80211_BAND_5GHZ && 1169 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1170 assoc_data->link[link_id].conn_flags |= 1171 IEEE80211_CONN_DISABLE_HE | 1172 IEEE80211_CONN_DISABLE_EHT; 1173 1174 /* if present, add any custom IEs that go before HE */ 1175 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1176 extra_elems_len, 1177 offset); 1178 1179 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1180 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1181 assoc_data->link[link_id].conn_flags); 1182 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1183 } 1184 1185 /* 1186 * careful - need to know about all the present elems before 1187 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1188 * we're going to put it after the ML element 1189 */ 1190 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1191 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1192 1193 if (link_id == assoc_data->assoc_link_id) 1194 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1195 present_elems); 1196 1197 /* crash if somebody gets it wrong */ 1198 present_elems = NULL; 1199 1200 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1201 ieee80211_add_eht_ie(sdata, skb, sband); 1202 1203 if (sband->band == NL80211_BAND_S1GHZ) { 1204 ieee80211_add_aid_request_ie(sdata, skb); 1205 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1206 } 1207 1208 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1209 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1210 1211 if (link) 1212 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1213 1214 return offset; 1215 } 1216 1217 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1218 const u16 *outer, 1219 const u16 *inner) 1220 { 1221 unsigned int skb_len = skb->len; 1222 bool at_extension = false; 1223 bool added = false; 1224 int i, j; 1225 u8 *len, *list_len = NULL; 1226 1227 skb_put_u8(skb, WLAN_EID_EXTENSION); 1228 len = skb_put(skb, 1); 1229 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1230 1231 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1232 u16 elem = outer[i]; 1233 bool have_inner = false; 1234 1235 /* should at least be sorted in the sense of normal -> ext */ 1236 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1237 1238 /* switch to extension list */ 1239 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1240 at_extension = true; 1241 if (!list_len) 1242 skb_put_u8(skb, 0); 1243 list_len = NULL; 1244 } 1245 1246 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1247 if (elem == inner[j]) { 1248 have_inner = true; 1249 break; 1250 } 1251 } 1252 1253 if (have_inner) 1254 continue; 1255 1256 if (!list_len) { 1257 list_len = skb_put(skb, 1); 1258 *list_len = 0; 1259 } 1260 *list_len += 1; 1261 skb_put_u8(skb, (u8)elem); 1262 added = true; 1263 } 1264 1265 /* if we added a list but no extension list, make a zero-len one */ 1266 if (added && (!at_extension || !list_len)) 1267 skb_put_u8(skb, 0); 1268 1269 /* if nothing added remove extension element completely */ 1270 if (!added) 1271 skb_trim(skb, skb_len); 1272 else 1273 *len = skb->len - skb_len - 2; 1274 } 1275 1276 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1277 struct sk_buff *skb, u16 capab, 1278 const struct element *ext_capa, 1279 const u16 *outer_present_elems) 1280 { 1281 struct ieee80211_local *local = sdata->local; 1282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1283 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1284 struct ieee80211_multi_link_elem *ml_elem; 1285 struct ieee80211_mle_basic_common_info *common; 1286 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1287 __le16 eml_capa = 0, mld_capa_ops = 0; 1288 unsigned int link_id; 1289 u8 *ml_elem_len; 1290 void *capab_pos; 1291 1292 if (!ieee80211_vif_is_mld(&sdata->vif)) 1293 return; 1294 1295 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1296 ieee80211_vif_type_p2p(&sdata->vif)); 1297 if (ift_ext_capa) { 1298 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1299 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1300 } 1301 1302 skb_put_u8(skb, WLAN_EID_EXTENSION); 1303 ml_elem_len = skb_put(skb, 1); 1304 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1305 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1306 ml_elem->control = 1307 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1308 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1309 common = skb_put(skb, sizeof(*common)); 1310 common->len = sizeof(*common) + 1311 2; /* MLD capa/ops */ 1312 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1313 1314 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1315 if (eml_capa & 1316 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1317 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1318 common->len += 2; /* EML capabilities */ 1319 ml_elem->control |= 1320 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1321 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1322 } 1323 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1324 1325 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1326 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1327 const u8 *extra_elems; 1328 size_t extra_elems_len; 1329 size_t extra_used; 1330 u8 *subelem_len = NULL; 1331 __le16 ctrl; 1332 1333 if (!assoc_data->link[link_id].bss || 1334 link_id == assoc_data->assoc_link_id) 1335 continue; 1336 1337 extra_elems = assoc_data->link[link_id].elems; 1338 extra_elems_len = assoc_data->link[link_id].elems_len; 1339 1340 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1341 subelem_len = skb_put(skb, 1); 1342 1343 ctrl = cpu_to_le16(link_id | 1344 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1345 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1346 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1347 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1348 skb_put_data(skb, assoc_data->link[link_id].addr, 1349 ETH_ALEN); 1350 /* 1351 * Now add the contents of the (re)association request, 1352 * but the "listen interval" and "current AP address" 1353 * (if applicable) are skipped. So we only have 1354 * the capability field (remember the position and fill 1355 * later), followed by the elements added below by 1356 * calling ieee80211_assoc_link_elems(). 1357 */ 1358 capab_pos = skb_put(skb, 2); 1359 1360 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1361 ext_capa, 1362 extra_elems, 1363 extra_elems_len, 1364 link_id, NULL, 1365 link_present_elems); 1366 if (extra_elems) 1367 skb_put_data(skb, extra_elems + extra_used, 1368 extra_elems_len - extra_used); 1369 1370 put_unaligned_le16(capab, capab_pos); 1371 1372 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1373 link_present_elems); 1374 1375 ieee80211_fragment_element(skb, subelem_len, 1376 IEEE80211_MLE_SUBELEM_FRAGMENT); 1377 } 1378 1379 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1380 } 1381 1382 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1383 { 1384 struct ieee80211_local *local = sdata->local; 1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1386 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1387 struct ieee80211_link_data *link; 1388 struct sk_buff *skb; 1389 struct ieee80211_mgmt *mgmt; 1390 u8 *pos, qos_info, *ie_start; 1391 size_t offset, noffset; 1392 u16 capab = 0, link_capab; 1393 __le16 listen_int; 1394 struct element *ext_capa = NULL; 1395 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1396 struct ieee80211_prep_tx_info info = {}; 1397 unsigned int link_id, n_links = 0; 1398 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1399 void *capab_pos; 1400 size_t size; 1401 int ret; 1402 1403 /* we know it's writable, cast away the const */ 1404 if (assoc_data->ie_len) 1405 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1406 assoc_data->ie, 1407 assoc_data->ie_len); 1408 1409 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1410 1411 size = local->hw.extra_tx_headroom + 1412 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1413 2 + assoc_data->ssid_len + /* SSID */ 1414 assoc_data->ie_len + /* extra IEs */ 1415 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1416 9; /* WMM */ 1417 1418 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1419 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1420 const struct ieee80211_sband_iftype_data *iftd; 1421 struct ieee80211_supported_band *sband; 1422 1423 if (!cbss) 1424 continue; 1425 1426 sband = local->hw.wiphy->bands[cbss->channel->band]; 1427 1428 n_links++; 1429 /* add STA profile elements length */ 1430 size += assoc_data->link[link_id].elems_len; 1431 /* and supported rates length */ 1432 size += 4 + sband->n_bitrates; 1433 /* supported channels */ 1434 size += 2 + 2 * sband->n_channels; 1435 1436 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1437 if (iftd) 1438 size += iftd->vendor_elems.len; 1439 1440 /* power capability */ 1441 size += 4; 1442 1443 /* HT, VHT, HE, EHT */ 1444 size += 2 + sizeof(struct ieee80211_ht_cap); 1445 size += 2 + sizeof(struct ieee80211_vht_cap); 1446 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1447 sizeof(struct ieee80211_he_mcs_nss_supp) + 1448 IEEE80211_HE_PPE_THRES_MAX_LEN; 1449 1450 if (sband->band == NL80211_BAND_6GHZ) 1451 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1452 1453 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1454 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1455 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1456 1457 /* non-inheritance element */ 1458 size += 2 + 2 + PRESENT_ELEMS_MAX; 1459 1460 /* should be the same across all BSSes */ 1461 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1462 capab |= WLAN_CAPABILITY_PRIVACY; 1463 } 1464 1465 if (ieee80211_vif_is_mld(&sdata->vif)) { 1466 /* consider the multi-link element with STA profile */ 1467 size += sizeof(struct ieee80211_multi_link_elem); 1468 /* max common info field in basic multi-link element */ 1469 size += sizeof(struct ieee80211_mle_basic_common_info) + 1470 2 + /* capa & op */ 1471 2; /* EML capa */ 1472 1473 /* 1474 * The capability elements were already considered above; 1475 * note this over-estimates a bit because there's no 1476 * STA profile for the assoc link. 1477 */ 1478 size += (n_links - 1) * 1479 (1 + 1 + /* subelement ID/length */ 1480 2 + /* STA control */ 1481 1 + ETH_ALEN + 2 /* STA Info field */); 1482 } 1483 1484 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1485 if (WARN_ON(!link)) 1486 return -EINVAL; 1487 1488 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1489 return -EINVAL; 1490 1491 skb = alloc_skb(size, GFP_KERNEL); 1492 if (!skb) 1493 return -ENOMEM; 1494 1495 skb_reserve(skb, local->hw.extra_tx_headroom); 1496 1497 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1498 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1499 1500 /* Set MBSSID support for HE AP if needed */ 1501 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1502 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1503 ext_capa && ext_capa->datalen >= 3) 1504 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1505 1506 mgmt = skb_put_zero(skb, 24); 1507 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1508 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1509 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1510 1511 listen_int = cpu_to_le16(assoc_data->s1g ? 1512 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1513 local->hw.conf.listen_interval); 1514 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1515 skb_put(skb, 10); 1516 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1517 IEEE80211_STYPE_REASSOC_REQ); 1518 capab_pos = &mgmt->u.reassoc_req.capab_info; 1519 mgmt->u.reassoc_req.listen_interval = listen_int; 1520 memcpy(mgmt->u.reassoc_req.current_ap, 1521 assoc_data->prev_ap_addr, ETH_ALEN); 1522 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1523 } else { 1524 skb_put(skb, 4); 1525 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1526 IEEE80211_STYPE_ASSOC_REQ); 1527 capab_pos = &mgmt->u.assoc_req.capab_info; 1528 mgmt->u.assoc_req.listen_interval = listen_int; 1529 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1530 } 1531 1532 /* SSID */ 1533 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1534 ie_start = pos; 1535 *pos++ = WLAN_EID_SSID; 1536 *pos++ = assoc_data->ssid_len; 1537 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1538 1539 /* 1540 * This bit is technically reserved, so it shouldn't matter for either 1541 * the AP or us, but it also means we shouldn't set it. However, we've 1542 * always set it in the past, and apparently some EHT APs check that 1543 * we don't set it. To avoid interoperability issues with old APs that 1544 * for some reason check it and want it to be set, set the bit for all 1545 * pre-EHT connections as we used to do. 1546 */ 1547 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT) 1548 capab |= WLAN_CAPABILITY_ESS; 1549 1550 /* add the elements for the assoc (main) link */ 1551 link_capab = capab; 1552 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1553 ext_capa, 1554 assoc_data->ie, 1555 assoc_data->ie_len, 1556 assoc_data->assoc_link_id, link, 1557 present_elems); 1558 put_unaligned_le16(link_capab, capab_pos); 1559 1560 /* if present, add any custom non-vendor IEs */ 1561 if (assoc_data->ie_len) { 1562 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1563 assoc_data->ie_len, 1564 offset); 1565 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1566 offset = noffset; 1567 } 1568 1569 if (assoc_data->wmm) { 1570 if (assoc_data->uapsd) { 1571 qos_info = ifmgd->uapsd_queues; 1572 qos_info |= (ifmgd->uapsd_max_sp_len << 1573 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1574 } else { 1575 qos_info = 0; 1576 } 1577 1578 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1579 } 1580 1581 /* add any remaining custom (i.e. vendor specific here) IEs */ 1582 if (assoc_data->ie_len) { 1583 noffset = assoc_data->ie_len; 1584 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1585 } 1586 1587 if (assoc_data->fils_kek_len) { 1588 ret = fils_encrypt_assoc_req(skb, assoc_data); 1589 if (ret < 0) { 1590 dev_kfree_skb(skb); 1591 return ret; 1592 } 1593 } 1594 1595 pos = skb_tail_pointer(skb); 1596 kfree(ifmgd->assoc_req_ies); 1597 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1598 if (!ifmgd->assoc_req_ies) { 1599 dev_kfree_skb(skb); 1600 return -ENOMEM; 1601 } 1602 1603 ifmgd->assoc_req_ies_len = pos - ie_start; 1604 1605 info.link_id = assoc_data->assoc_link_id; 1606 drv_mgd_prepare_tx(local, sdata, &info); 1607 1608 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1609 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1610 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1611 IEEE80211_TX_INTFL_MLME_CONN_TX; 1612 ieee80211_tx_skb(sdata, skb); 1613 1614 return 0; 1615 } 1616 1617 void ieee80211_send_pspoll(struct ieee80211_local *local, 1618 struct ieee80211_sub_if_data *sdata) 1619 { 1620 struct ieee80211_pspoll *pspoll; 1621 struct sk_buff *skb; 1622 1623 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1624 if (!skb) 1625 return; 1626 1627 pspoll = (struct ieee80211_pspoll *) skb->data; 1628 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1629 1630 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1631 ieee80211_tx_skb(sdata, skb); 1632 } 1633 1634 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1635 struct ieee80211_sub_if_data *sdata, 1636 bool powersave) 1637 { 1638 struct sk_buff *skb; 1639 struct ieee80211_hdr_3addr *nullfunc; 1640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1641 1642 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1643 !ieee80211_hw_check(&local->hw, 1644 DOESNT_SUPPORT_QOS_NDP)); 1645 if (!skb) 1646 return; 1647 1648 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1649 if (powersave) 1650 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1651 1652 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1653 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1654 1655 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1656 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1657 1658 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1659 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1660 1661 ieee80211_tx_skb(sdata, skb); 1662 } 1663 1664 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1665 struct ieee80211_sub_if_data *sdata) 1666 { 1667 struct sk_buff *skb; 1668 struct ieee80211_hdr *nullfunc; 1669 __le16 fc; 1670 1671 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1672 return; 1673 1674 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1675 if (!skb) 1676 return; 1677 1678 skb_reserve(skb, local->hw.extra_tx_headroom); 1679 1680 nullfunc = skb_put_zero(skb, 30); 1681 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1682 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1683 nullfunc->frame_control = fc; 1684 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1685 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1686 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1687 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1688 1689 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1690 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1691 ieee80211_tx_skb(sdata, skb); 1692 } 1693 1694 /* spectrum management related things */ 1695 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1696 struct wiphy_work *work) 1697 { 1698 struct ieee80211_link_data *link = 1699 container_of(work, struct ieee80211_link_data, 1700 u.mgd.chswitch_work.work); 1701 struct ieee80211_sub_if_data *sdata = link->sdata; 1702 struct ieee80211_local *local = sdata->local; 1703 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1704 int ret; 1705 1706 if (!ieee80211_sdata_running(sdata)) 1707 return; 1708 1709 lockdep_assert_wiphy(local->hw.wiphy); 1710 1711 if (!ifmgd->associated) 1712 return; 1713 1714 if (!link->conf->csa_active) 1715 return; 1716 1717 /* 1718 * using reservation isn't immediate as it may be deferred until later 1719 * with multi-vif. once reservation is complete it will re-schedule the 1720 * work with no reserved_chanctx so verify chandef to check if it 1721 * completed successfully 1722 */ 1723 1724 if (link->reserved_chanctx) { 1725 /* 1726 * with multi-vif csa driver may call ieee80211_csa_finish() 1727 * many times while waiting for other interfaces to use their 1728 * reservations 1729 */ 1730 if (link->reserved_ready) 1731 return; 1732 1733 ret = ieee80211_link_use_reserved_context(link); 1734 if (ret) { 1735 sdata_info(sdata, 1736 "failed to use reserved channel context, disconnecting (err=%d)\n", 1737 ret); 1738 wiphy_work_queue(sdata->local->hw.wiphy, 1739 &ifmgd->csa_connection_drop_work); 1740 } 1741 return; 1742 } 1743 1744 if (!cfg80211_chandef_identical(&link->conf->chandef, 1745 &link->csa_chandef)) { 1746 sdata_info(sdata, 1747 "failed to finalize channel switch, disconnecting\n"); 1748 wiphy_work_queue(sdata->local->hw.wiphy, 1749 &ifmgd->csa_connection_drop_work); 1750 return; 1751 } 1752 1753 link->u.mgd.csa_waiting_bcn = true; 1754 1755 ieee80211_sta_reset_beacon_monitor(sdata); 1756 ieee80211_sta_reset_conn_monitor(sdata); 1757 } 1758 1759 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1760 { 1761 struct ieee80211_sub_if_data *sdata = link->sdata; 1762 struct ieee80211_local *local = sdata->local; 1763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1764 int ret; 1765 1766 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1767 1768 WARN_ON(!link->conf->csa_active); 1769 1770 if (link->csa_block_tx) { 1771 ieee80211_wake_vif_queues(local, sdata, 1772 IEEE80211_QUEUE_STOP_REASON_CSA); 1773 link->csa_block_tx = false; 1774 } 1775 1776 link->conf->csa_active = false; 1777 link->u.mgd.csa_waiting_bcn = false; 1778 /* 1779 * If the CSA IE is still present on the beacon after the switch, 1780 * we need to consider it as a new CSA (possibly to self). 1781 */ 1782 link->u.mgd.beacon_crc_valid = false; 1783 1784 ret = drv_post_channel_switch(link); 1785 if (ret) { 1786 sdata_info(sdata, 1787 "driver post channel switch failed, disconnecting\n"); 1788 wiphy_work_queue(sdata->local->hw.wiphy, 1789 &ifmgd->csa_connection_drop_work); 1790 return; 1791 } 1792 1793 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 1794 link->link_id, 0); 1795 } 1796 1797 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 1798 unsigned int link_id) 1799 { 1800 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1801 1802 trace_api_chswitch_done(sdata, success, link_id); 1803 1804 rcu_read_lock(); 1805 1806 if (!success) { 1807 sdata_info(sdata, 1808 "driver channel switch failed, disconnecting\n"); 1809 wiphy_work_queue(sdata->local->hw.wiphy, 1810 &sdata->u.mgd.csa_connection_drop_work); 1811 } else { 1812 struct ieee80211_link_data *link = 1813 rcu_dereference(sdata->link[link_id]); 1814 1815 if (WARN_ON(!link)) { 1816 rcu_read_unlock(); 1817 return; 1818 } 1819 1820 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1821 &link->u.mgd.chswitch_work, 0); 1822 } 1823 1824 rcu_read_unlock(); 1825 } 1826 EXPORT_SYMBOL(ieee80211_chswitch_done); 1827 1828 static void 1829 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1830 { 1831 struct ieee80211_sub_if_data *sdata = link->sdata; 1832 struct ieee80211_local *local = sdata->local; 1833 1834 lockdep_assert_wiphy(local->hw.wiphy); 1835 1836 if (!local->ops->abort_channel_switch) 1837 return; 1838 1839 ieee80211_link_unreserve_chanctx(link); 1840 1841 if (link->csa_block_tx) 1842 ieee80211_wake_vif_queues(local, sdata, 1843 IEEE80211_QUEUE_STOP_REASON_CSA); 1844 1845 link->csa_block_tx = false; 1846 link->conf->csa_active = false; 1847 1848 drv_abort_channel_switch(sdata); 1849 } 1850 1851 static void 1852 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1853 u64 timestamp, u32 device_timestamp, 1854 struct ieee802_11_elems *elems, 1855 bool beacon) 1856 { 1857 struct ieee80211_sub_if_data *sdata = link->sdata; 1858 struct ieee80211_local *local = sdata->local; 1859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1860 struct cfg80211_bss *cbss = link->u.mgd.bss; 1861 struct ieee80211_chanctx_conf *conf; 1862 struct ieee80211_chanctx *chanctx; 1863 enum nl80211_band current_band; 1864 struct ieee80211_csa_ie csa_ie; 1865 struct ieee80211_channel_switch ch_switch; 1866 struct ieee80211_bss *bss; 1867 unsigned long timeout; 1868 int res; 1869 1870 lockdep_assert_wiphy(local->hw.wiphy); 1871 1872 if (!cbss) 1873 return; 1874 1875 current_band = cbss->channel->band; 1876 bss = (void *)cbss->priv; 1877 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1878 bss->vht_cap_info, 1879 link->u.mgd.conn_flags, 1880 link->u.mgd.bssid, &csa_ie); 1881 1882 if (!res) { 1883 ch_switch.timestamp = timestamp; 1884 ch_switch.device_timestamp = device_timestamp; 1885 ch_switch.block_tx = csa_ie.mode; 1886 ch_switch.chandef = csa_ie.chandef; 1887 ch_switch.count = csa_ie.count; 1888 ch_switch.delay = csa_ie.max_switch_time; 1889 } 1890 1891 if (res < 0) 1892 goto drop_connection; 1893 1894 if (beacon && link->conf->csa_active && 1895 !link->u.mgd.csa_waiting_bcn) { 1896 if (res) 1897 ieee80211_sta_abort_chanswitch(link); 1898 else 1899 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1900 return; 1901 } else if (link->conf->csa_active || res) { 1902 /* disregard subsequent announcements if already processing */ 1903 return; 1904 } 1905 1906 if (link->conf->chandef.chan->band != 1907 csa_ie.chandef.chan->band) { 1908 sdata_info(sdata, 1909 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1910 link->u.mgd.bssid, 1911 csa_ie.chandef.chan->center_freq, 1912 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1913 csa_ie.chandef.center_freq2); 1914 goto drop_connection; 1915 } 1916 1917 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1918 IEEE80211_CHAN_DISABLED)) { 1919 sdata_info(sdata, 1920 "AP %pM switches to unsupported channel " 1921 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1922 "disconnecting\n", 1923 link->u.mgd.bssid, 1924 csa_ie.chandef.chan->center_freq, 1925 csa_ie.chandef.chan->freq_offset, 1926 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1927 csa_ie.chandef.freq1_offset, 1928 csa_ie.chandef.center_freq2); 1929 goto drop_connection; 1930 } 1931 1932 if (cfg80211_chandef_identical(&csa_ie.chandef, 1933 &link->conf->chandef) && 1934 (!csa_ie.mode || !beacon)) { 1935 if (link->u.mgd.csa_ignored_same_chan) 1936 return; 1937 sdata_info(sdata, 1938 "AP %pM tries to chanswitch to same channel, ignore\n", 1939 link->u.mgd.bssid); 1940 link->u.mgd.csa_ignored_same_chan = true; 1941 return; 1942 } 1943 1944 /* 1945 * Drop all TDLS peers - either we disconnect or move to a different 1946 * channel from this point on. There's no telling what our peer will do. 1947 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1948 * have an incompatible wider chandef. 1949 */ 1950 ieee80211_teardown_tdls_peers(sdata); 1951 1952 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1953 lockdep_is_held(&local->hw.wiphy->mtx)); 1954 if (!conf) { 1955 sdata_info(sdata, 1956 "no channel context assigned to vif?, disconnecting\n"); 1957 goto drop_connection; 1958 } 1959 1960 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1961 1962 if (local->use_chanctx && 1963 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1964 sdata_info(sdata, 1965 "driver doesn't support chan-switch with channel contexts\n"); 1966 goto drop_connection; 1967 } 1968 1969 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1970 sdata_info(sdata, 1971 "preparing for channel switch failed, disconnecting\n"); 1972 goto drop_connection; 1973 } 1974 1975 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1976 chanctx->mode, false); 1977 if (res) { 1978 sdata_info(sdata, 1979 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1980 res); 1981 goto drop_connection; 1982 } 1983 1984 link->conf->csa_active = true; 1985 link->csa_chandef = csa_ie.chandef; 1986 link->csa_block_tx = csa_ie.mode; 1987 link->u.mgd.csa_ignored_same_chan = false; 1988 link->u.mgd.beacon_crc_valid = false; 1989 1990 if (link->csa_block_tx) 1991 ieee80211_stop_vif_queues(local, sdata, 1992 IEEE80211_QUEUE_STOP_REASON_CSA); 1993 1994 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1995 link->link_id, csa_ie.count, 1996 csa_ie.mode, 0); 1997 1998 if (local->ops->channel_switch) { 1999 /* use driver's channel switch callback */ 2000 drv_channel_switch(local, sdata, &ch_switch); 2001 return; 2002 } 2003 2004 /* channel switch handled in software */ 2005 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2006 cbss->beacon_interval); 2007 wiphy_delayed_work_queue(local->hw.wiphy, 2008 &link->u.mgd.chswitch_work, 2009 timeout); 2010 return; 2011 drop_connection: 2012 /* 2013 * This is just so that the disconnect flow will know that 2014 * we were trying to switch channel and failed. In case the 2015 * mode is 1 (we are not allowed to Tx), we will know not to 2016 * send a deauthentication frame. Those two fields will be 2017 * reset when the disconnection worker runs. 2018 */ 2019 link->conf->csa_active = true; 2020 link->csa_block_tx = csa_ie.mode; 2021 2022 wiphy_work_queue(sdata->local->hw.wiphy, 2023 &ifmgd->csa_connection_drop_work); 2024 } 2025 2026 static bool 2027 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2028 struct ieee80211_channel *channel, 2029 const u8 *country_ie, u8 country_ie_len, 2030 const u8 *pwr_constr_elem, 2031 int *chan_pwr, int *pwr_reduction) 2032 { 2033 struct ieee80211_country_ie_triplet *triplet; 2034 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2035 int i, chan_increment; 2036 bool have_chan_pwr = false; 2037 2038 /* Invalid IE */ 2039 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2040 return false; 2041 2042 triplet = (void *)(country_ie + 3); 2043 country_ie_len -= 3; 2044 2045 switch (channel->band) { 2046 default: 2047 WARN_ON_ONCE(1); 2048 fallthrough; 2049 case NL80211_BAND_2GHZ: 2050 case NL80211_BAND_60GHZ: 2051 case NL80211_BAND_LC: 2052 chan_increment = 1; 2053 break; 2054 case NL80211_BAND_5GHZ: 2055 chan_increment = 4; 2056 break; 2057 case NL80211_BAND_6GHZ: 2058 /* 2059 * In the 6 GHz band, the "maximum transmit power level" 2060 * field in the triplets is reserved, and thus will be 2061 * zero and we shouldn't use it to control TX power. 2062 * The actual TX power will be given in the transmit 2063 * power envelope element instead. 2064 */ 2065 return false; 2066 } 2067 2068 /* find channel */ 2069 while (country_ie_len >= 3) { 2070 u8 first_channel = triplet->chans.first_channel; 2071 2072 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2073 goto next; 2074 2075 for (i = 0; i < triplet->chans.num_channels; i++) { 2076 if (first_channel + i * chan_increment == chan) { 2077 have_chan_pwr = true; 2078 *chan_pwr = triplet->chans.max_power; 2079 break; 2080 } 2081 } 2082 if (have_chan_pwr) 2083 break; 2084 2085 next: 2086 triplet++; 2087 country_ie_len -= 3; 2088 } 2089 2090 if (have_chan_pwr && pwr_constr_elem) 2091 *pwr_reduction = *pwr_constr_elem; 2092 else 2093 *pwr_reduction = 0; 2094 2095 return have_chan_pwr; 2096 } 2097 2098 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2099 struct ieee80211_channel *channel, 2100 const u8 *cisco_dtpc_ie, 2101 int *pwr_level) 2102 { 2103 /* From practical testing, the first data byte of the DTPC element 2104 * seems to contain the requested dBm level, and the CLI on Cisco 2105 * APs clearly state the range is -127 to 127 dBm, which indicates 2106 * a signed byte, although it seemingly never actually goes negative. 2107 * The other byte seems to always be zero. 2108 */ 2109 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2110 } 2111 2112 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2113 struct ieee80211_channel *channel, 2114 struct ieee80211_mgmt *mgmt, 2115 const u8 *country_ie, u8 country_ie_len, 2116 const u8 *pwr_constr_ie, 2117 const u8 *cisco_dtpc_ie) 2118 { 2119 struct ieee80211_sub_if_data *sdata = link->sdata; 2120 bool has_80211h_pwr = false, has_cisco_pwr = false; 2121 int chan_pwr = 0, pwr_reduction_80211h = 0; 2122 int pwr_level_cisco, pwr_level_80211h; 2123 int new_ap_level; 2124 __le16 capab = mgmt->u.probe_resp.capab_info; 2125 2126 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2127 return 0; /* TODO */ 2128 2129 if (country_ie && 2130 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2131 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2132 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2133 sdata, channel, country_ie, country_ie_len, 2134 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2135 pwr_level_80211h = 2136 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2137 } 2138 2139 if (cisco_dtpc_ie) { 2140 ieee80211_find_cisco_dtpc( 2141 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2142 has_cisco_pwr = true; 2143 } 2144 2145 if (!has_80211h_pwr && !has_cisco_pwr) 2146 return 0; 2147 2148 /* If we have both 802.11h and Cisco DTPC, apply both limits 2149 * by picking the smallest of the two power levels advertised. 2150 */ 2151 if (has_80211h_pwr && 2152 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2153 new_ap_level = pwr_level_80211h; 2154 2155 if (link->ap_power_level == new_ap_level) 2156 return 0; 2157 2158 sdata_dbg(sdata, 2159 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2160 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2161 link->u.mgd.bssid); 2162 } else { /* has_cisco_pwr is always true here. */ 2163 new_ap_level = pwr_level_cisco; 2164 2165 if (link->ap_power_level == new_ap_level) 2166 return 0; 2167 2168 sdata_dbg(sdata, 2169 "Limiting TX power to %d dBm as advertised by %pM\n", 2170 pwr_level_cisco, link->u.mgd.bssid); 2171 } 2172 2173 link->ap_power_level = new_ap_level; 2174 if (__ieee80211_recalc_txpower(sdata)) 2175 return BSS_CHANGED_TXPOWER; 2176 return 0; 2177 } 2178 2179 /* powersave */ 2180 static void ieee80211_enable_ps(struct ieee80211_local *local, 2181 struct ieee80211_sub_if_data *sdata) 2182 { 2183 struct ieee80211_conf *conf = &local->hw.conf; 2184 2185 /* 2186 * If we are scanning right now then the parameters will 2187 * take effect when scan finishes. 2188 */ 2189 if (local->scanning) 2190 return; 2191 2192 if (conf->dynamic_ps_timeout > 0 && 2193 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2194 mod_timer(&local->dynamic_ps_timer, jiffies + 2195 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2196 } else { 2197 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2198 ieee80211_send_nullfunc(local, sdata, true); 2199 2200 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2201 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2202 return; 2203 2204 conf->flags |= IEEE80211_CONF_PS; 2205 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2206 } 2207 } 2208 2209 static void ieee80211_change_ps(struct ieee80211_local *local) 2210 { 2211 struct ieee80211_conf *conf = &local->hw.conf; 2212 2213 if (local->ps_sdata) { 2214 ieee80211_enable_ps(local, local->ps_sdata); 2215 } else if (conf->flags & IEEE80211_CONF_PS) { 2216 conf->flags &= ~IEEE80211_CONF_PS; 2217 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2218 del_timer_sync(&local->dynamic_ps_timer); 2219 wiphy_work_cancel(local->hw.wiphy, 2220 &local->dynamic_ps_enable_work); 2221 } 2222 } 2223 2224 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2225 { 2226 struct ieee80211_local *local = sdata->local; 2227 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2228 struct sta_info *sta = NULL; 2229 bool authorized = false; 2230 2231 if (!mgd->powersave) 2232 return false; 2233 2234 if (mgd->broken_ap) 2235 return false; 2236 2237 if (!mgd->associated) 2238 return false; 2239 2240 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2241 return false; 2242 2243 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2244 !sdata->deflink.u.mgd.have_beacon) 2245 return false; 2246 2247 rcu_read_lock(); 2248 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2249 if (sta) 2250 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2251 rcu_read_unlock(); 2252 2253 return authorized; 2254 } 2255 2256 /* need to hold RTNL or interface lock */ 2257 void ieee80211_recalc_ps(struct ieee80211_local *local) 2258 { 2259 struct ieee80211_sub_if_data *sdata, *found = NULL; 2260 int count = 0; 2261 int timeout; 2262 2263 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2264 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2265 local->ps_sdata = NULL; 2266 return; 2267 } 2268 2269 list_for_each_entry(sdata, &local->interfaces, list) { 2270 if (!ieee80211_sdata_running(sdata)) 2271 continue; 2272 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2273 /* If an AP vif is found, then disable PS 2274 * by setting the count to zero thereby setting 2275 * ps_sdata to NULL. 2276 */ 2277 count = 0; 2278 break; 2279 } 2280 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2281 continue; 2282 found = sdata; 2283 count++; 2284 } 2285 2286 if (count == 1 && ieee80211_powersave_allowed(found)) { 2287 u8 dtimper = found->deflink.u.mgd.dtim_period; 2288 2289 timeout = local->dynamic_ps_forced_timeout; 2290 if (timeout < 0) 2291 timeout = 100; 2292 local->hw.conf.dynamic_ps_timeout = timeout; 2293 2294 /* If the TIM IE is invalid, pretend the value is 1 */ 2295 if (!dtimper) 2296 dtimper = 1; 2297 2298 local->hw.conf.ps_dtim_period = dtimper; 2299 local->ps_sdata = found; 2300 } else { 2301 local->ps_sdata = NULL; 2302 } 2303 2304 ieee80211_change_ps(local); 2305 } 2306 2307 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2308 { 2309 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2310 2311 if (sdata->vif.cfg.ps != ps_allowed) { 2312 sdata->vif.cfg.ps = ps_allowed; 2313 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2314 } 2315 } 2316 2317 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2318 struct wiphy_work *work) 2319 { 2320 struct ieee80211_local *local = 2321 container_of(work, struct ieee80211_local, 2322 dynamic_ps_disable_work); 2323 2324 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2325 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2326 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2327 } 2328 2329 ieee80211_wake_queues_by_reason(&local->hw, 2330 IEEE80211_MAX_QUEUE_MAP, 2331 IEEE80211_QUEUE_STOP_REASON_PS, 2332 false); 2333 } 2334 2335 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2336 struct wiphy_work *work) 2337 { 2338 struct ieee80211_local *local = 2339 container_of(work, struct ieee80211_local, 2340 dynamic_ps_enable_work); 2341 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2342 struct ieee80211_if_managed *ifmgd; 2343 unsigned long flags; 2344 int q; 2345 2346 /* can only happen when PS was just disabled anyway */ 2347 if (!sdata) 2348 return; 2349 2350 ifmgd = &sdata->u.mgd; 2351 2352 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2353 return; 2354 2355 if (local->hw.conf.dynamic_ps_timeout > 0) { 2356 /* don't enter PS if TX frames are pending */ 2357 if (drv_tx_frames_pending(local)) { 2358 mod_timer(&local->dynamic_ps_timer, jiffies + 2359 msecs_to_jiffies( 2360 local->hw.conf.dynamic_ps_timeout)); 2361 return; 2362 } 2363 2364 /* 2365 * transmission can be stopped by others which leads to 2366 * dynamic_ps_timer expiry. Postpone the ps timer if it 2367 * is not the actual idle state. 2368 */ 2369 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2370 for (q = 0; q < local->hw.queues; q++) { 2371 if (local->queue_stop_reasons[q]) { 2372 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2373 flags); 2374 mod_timer(&local->dynamic_ps_timer, jiffies + 2375 msecs_to_jiffies( 2376 local->hw.conf.dynamic_ps_timeout)); 2377 return; 2378 } 2379 } 2380 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2381 } 2382 2383 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2384 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2385 if (drv_tx_frames_pending(local)) { 2386 mod_timer(&local->dynamic_ps_timer, jiffies + 2387 msecs_to_jiffies( 2388 local->hw.conf.dynamic_ps_timeout)); 2389 } else { 2390 ieee80211_send_nullfunc(local, sdata, true); 2391 /* Flush to get the tx status of nullfunc frame */ 2392 ieee80211_flush_queues(local, sdata, false); 2393 } 2394 } 2395 2396 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2397 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2398 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2399 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2400 local->hw.conf.flags |= IEEE80211_CONF_PS; 2401 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2402 } 2403 } 2404 2405 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2406 { 2407 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2408 2409 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 2410 } 2411 2412 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 2413 { 2414 struct ieee80211_link_data *link = 2415 container_of(work, struct ieee80211_link_data, 2416 dfs_cac_timer_work.work); 2417 struct cfg80211_chan_def chandef = link->conf->chandef; 2418 struct ieee80211_sub_if_data *sdata = link->sdata; 2419 2420 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2421 2422 if (sdata->wdev.cac_started) { 2423 ieee80211_link_release_channel(link); 2424 cfg80211_cac_event(sdata->dev, &chandef, 2425 NL80211_RADAR_CAC_FINISHED, 2426 GFP_KERNEL); 2427 } 2428 } 2429 2430 static bool 2431 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2432 { 2433 struct ieee80211_local *local = sdata->local; 2434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2435 bool ret = false; 2436 int ac; 2437 2438 if (local->hw.queues < IEEE80211_NUM_ACS) 2439 return false; 2440 2441 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2442 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2443 int non_acm_ac; 2444 unsigned long now = jiffies; 2445 2446 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2447 tx_tspec->admitted_time && 2448 time_after(now, tx_tspec->time_slice_start + HZ)) { 2449 tx_tspec->consumed_tx_time = 0; 2450 tx_tspec->time_slice_start = now; 2451 2452 if (tx_tspec->downgraded) 2453 tx_tspec->action = 2454 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2455 } 2456 2457 switch (tx_tspec->action) { 2458 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2459 /* take the original parameters */ 2460 if (drv_conf_tx(local, &sdata->deflink, ac, 2461 &sdata->deflink.tx_conf[ac])) 2462 link_err(&sdata->deflink, 2463 "failed to set TX queue parameters for queue %d\n", 2464 ac); 2465 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2466 tx_tspec->downgraded = false; 2467 ret = true; 2468 break; 2469 case TX_TSPEC_ACTION_DOWNGRADE: 2470 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2471 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2472 ret = true; 2473 break; 2474 } 2475 /* downgrade next lower non-ACM AC */ 2476 for (non_acm_ac = ac + 1; 2477 non_acm_ac < IEEE80211_NUM_ACS; 2478 non_acm_ac++) 2479 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2480 break; 2481 /* Usually the loop will result in using BK even if it 2482 * requires admission control, but such a configuration 2483 * makes no sense and we have to transmit somehow - the 2484 * AC selection does the same thing. 2485 * If we started out trying to downgrade from BK, then 2486 * the extra condition here might be needed. 2487 */ 2488 if (non_acm_ac >= IEEE80211_NUM_ACS) 2489 non_acm_ac = IEEE80211_AC_BK; 2490 if (drv_conf_tx(local, &sdata->deflink, ac, 2491 &sdata->deflink.tx_conf[non_acm_ac])) 2492 link_err(&sdata->deflink, 2493 "failed to set TX queue parameters for queue %d\n", 2494 ac); 2495 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2496 ret = true; 2497 wiphy_delayed_work_queue(local->hw.wiphy, 2498 &ifmgd->tx_tspec_wk, 2499 tx_tspec->time_slice_start + 2500 HZ - now + 1); 2501 break; 2502 case TX_TSPEC_ACTION_NONE: 2503 /* nothing now */ 2504 break; 2505 } 2506 } 2507 2508 return ret; 2509 } 2510 2511 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2512 { 2513 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2514 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2515 BSS_CHANGED_QOS); 2516 } 2517 2518 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 2519 struct wiphy_work *work) 2520 { 2521 struct ieee80211_sub_if_data *sdata; 2522 2523 sdata = container_of(work, struct ieee80211_sub_if_data, 2524 u.mgd.tx_tspec_wk.work); 2525 ieee80211_sta_handle_tspec_ac_params(sdata); 2526 } 2527 2528 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2529 { 2530 struct ieee80211_sub_if_data *sdata = link->sdata; 2531 struct ieee80211_local *local = sdata->local; 2532 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2533 struct ieee80211_tx_queue_params *params = link->tx_conf; 2534 u8 ac; 2535 2536 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2537 mlme_dbg(sdata, 2538 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2539 ac, params[ac].acm, 2540 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2541 params[ac].txop, params[ac].uapsd, 2542 ifmgd->tx_tspec[ac].downgraded); 2543 if (!ifmgd->tx_tspec[ac].downgraded && 2544 drv_conf_tx(local, link, ac, ¶ms[ac])) 2545 link_err(link, 2546 "failed to set TX queue parameters for AC %d\n", 2547 ac); 2548 } 2549 } 2550 2551 /* MLME */ 2552 static bool 2553 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2554 struct ieee80211_link_data *link, 2555 const u8 *wmm_param, size_t wmm_param_len, 2556 const struct ieee80211_mu_edca_param_set *mu_edca) 2557 { 2558 struct ieee80211_sub_if_data *sdata = link->sdata; 2559 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2561 size_t left; 2562 int count, mu_edca_count, ac; 2563 const u8 *pos; 2564 u8 uapsd_queues = 0; 2565 2566 if (!local->ops->conf_tx) 2567 return false; 2568 2569 if (local->hw.queues < IEEE80211_NUM_ACS) 2570 return false; 2571 2572 if (!wmm_param) 2573 return false; 2574 2575 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2576 return false; 2577 2578 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2579 uapsd_queues = ifmgd->uapsd_queues; 2580 2581 count = wmm_param[6] & 0x0f; 2582 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2583 * if mu_edca was preset before and now it disappeared tell 2584 * the driver about it. 2585 */ 2586 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2587 if (count == link->u.mgd.wmm_last_param_set && 2588 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2589 return false; 2590 link->u.mgd.wmm_last_param_set = count; 2591 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2592 2593 pos = wmm_param + 8; 2594 left = wmm_param_len - 8; 2595 2596 memset(¶ms, 0, sizeof(params)); 2597 2598 sdata->wmm_acm = 0; 2599 for (; left >= 4; left -= 4, pos += 4) { 2600 int aci = (pos[0] >> 5) & 0x03; 2601 int acm = (pos[0] >> 4) & 0x01; 2602 bool uapsd = false; 2603 2604 switch (aci) { 2605 case 1: /* AC_BK */ 2606 ac = IEEE80211_AC_BK; 2607 if (acm) 2608 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2609 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2610 uapsd = true; 2611 params[ac].mu_edca = !!mu_edca; 2612 if (mu_edca) 2613 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2614 break; 2615 case 2: /* AC_VI */ 2616 ac = IEEE80211_AC_VI; 2617 if (acm) 2618 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2619 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2620 uapsd = true; 2621 params[ac].mu_edca = !!mu_edca; 2622 if (mu_edca) 2623 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2624 break; 2625 case 3: /* AC_VO */ 2626 ac = IEEE80211_AC_VO; 2627 if (acm) 2628 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2629 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2630 uapsd = true; 2631 params[ac].mu_edca = !!mu_edca; 2632 if (mu_edca) 2633 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2634 break; 2635 case 0: /* AC_BE */ 2636 default: 2637 ac = IEEE80211_AC_BE; 2638 if (acm) 2639 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2640 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2641 uapsd = true; 2642 params[ac].mu_edca = !!mu_edca; 2643 if (mu_edca) 2644 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2645 break; 2646 } 2647 2648 params[ac].aifs = pos[0] & 0x0f; 2649 2650 if (params[ac].aifs < 2) { 2651 link_info(link, 2652 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2653 params[ac].aifs, aci); 2654 params[ac].aifs = 2; 2655 } 2656 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2657 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2658 params[ac].txop = get_unaligned_le16(pos + 2); 2659 params[ac].acm = acm; 2660 params[ac].uapsd = uapsd; 2661 2662 if (params[ac].cw_min == 0 || 2663 params[ac].cw_min > params[ac].cw_max) { 2664 link_info(link, 2665 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2666 params[ac].cw_min, params[ac].cw_max, aci); 2667 return false; 2668 } 2669 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2670 } 2671 2672 /* WMM specification requires all 4 ACIs. */ 2673 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2674 if (params[ac].cw_min == 0) { 2675 link_info(link, 2676 "AP has invalid WMM params (missing AC %d), using defaults\n", 2677 ac); 2678 return false; 2679 } 2680 } 2681 2682 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2683 link->tx_conf[ac] = params[ac]; 2684 2685 ieee80211_mgd_set_link_qos_params(link); 2686 2687 /* enable WMM or activate new settings */ 2688 link->conf->qos = true; 2689 return true; 2690 } 2691 2692 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2693 { 2694 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2695 2696 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2697 ieee80211_run_deferred_scan(sdata->local); 2698 } 2699 2700 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2701 { 2702 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2703 2704 __ieee80211_stop_poll(sdata); 2705 } 2706 2707 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2708 u16 capab, bool erp_valid, u8 erp) 2709 { 2710 struct ieee80211_bss_conf *bss_conf = link->conf; 2711 struct ieee80211_supported_band *sband; 2712 u64 changed = 0; 2713 bool use_protection; 2714 bool use_short_preamble; 2715 bool use_short_slot; 2716 2717 sband = ieee80211_get_link_sband(link); 2718 if (!sband) 2719 return changed; 2720 2721 if (erp_valid) { 2722 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2723 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2724 } else { 2725 use_protection = false; 2726 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2727 } 2728 2729 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2730 if (sband->band == NL80211_BAND_5GHZ || 2731 sband->band == NL80211_BAND_6GHZ) 2732 use_short_slot = true; 2733 2734 if (use_protection != bss_conf->use_cts_prot) { 2735 bss_conf->use_cts_prot = use_protection; 2736 changed |= BSS_CHANGED_ERP_CTS_PROT; 2737 } 2738 2739 if (use_short_preamble != bss_conf->use_short_preamble) { 2740 bss_conf->use_short_preamble = use_short_preamble; 2741 changed |= BSS_CHANGED_ERP_PREAMBLE; 2742 } 2743 2744 if (use_short_slot != bss_conf->use_short_slot) { 2745 bss_conf->use_short_slot = use_short_slot; 2746 changed |= BSS_CHANGED_ERP_SLOT; 2747 } 2748 2749 return changed; 2750 } 2751 2752 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2753 struct cfg80211_bss *cbss) 2754 { 2755 struct ieee80211_sub_if_data *sdata = link->sdata; 2756 struct ieee80211_bss_conf *bss_conf = link->conf; 2757 struct ieee80211_bss *bss = (void *)cbss->priv; 2758 u64 changed = BSS_CHANGED_QOS; 2759 2760 /* not really used in MLO */ 2761 sdata->u.mgd.beacon_timeout = 2762 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2763 bss_conf->beacon_int)); 2764 2765 changed |= ieee80211_handle_bss_capability(link, 2766 bss_conf->assoc_capability, 2767 bss->has_erp_value, 2768 bss->erp_value); 2769 2770 ieee80211_check_rate_mask(link); 2771 2772 link->u.mgd.bss = cbss; 2773 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2774 2775 if (sdata->vif.p2p || 2776 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2777 const struct cfg80211_bss_ies *ies; 2778 2779 rcu_read_lock(); 2780 ies = rcu_dereference(cbss->ies); 2781 if (ies) { 2782 int ret; 2783 2784 ret = cfg80211_get_p2p_attr( 2785 ies->data, ies->len, 2786 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2787 (u8 *) &bss_conf->p2p_noa_attr, 2788 sizeof(bss_conf->p2p_noa_attr)); 2789 if (ret >= 2) { 2790 link->u.mgd.p2p_noa_index = 2791 bss_conf->p2p_noa_attr.index; 2792 changed |= BSS_CHANGED_P2P_PS; 2793 } 2794 } 2795 rcu_read_unlock(); 2796 } 2797 2798 if (link->u.mgd.have_beacon) { 2799 bss_conf->beacon_rate = bss->beacon_rate; 2800 changed |= BSS_CHANGED_BEACON_INFO; 2801 } else { 2802 bss_conf->beacon_rate = NULL; 2803 } 2804 2805 /* Tell the driver to monitor connection quality (if supported) */ 2806 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2807 bss_conf->cqm_rssi_thold) 2808 changed |= BSS_CHANGED_CQM; 2809 2810 return changed; 2811 } 2812 2813 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2814 struct ieee80211_mgd_assoc_data *assoc_data, 2815 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2816 { 2817 struct ieee80211_local *local = sdata->local; 2818 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2819 u64 vif_changed = BSS_CHANGED_ASSOC; 2820 unsigned int link_id; 2821 2822 lockdep_assert_wiphy(local->hw.wiphy); 2823 2824 sdata->u.mgd.associated = true; 2825 2826 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2827 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2828 struct ieee80211_link_data *link; 2829 2830 if (!cbss || 2831 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2832 continue; 2833 2834 if (ieee80211_vif_is_mld(&sdata->vif) && 2835 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 2836 continue; 2837 2838 link = sdata_dereference(sdata->link[link_id], sdata); 2839 if (WARN_ON(!link)) 2840 return; 2841 2842 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2843 } 2844 2845 /* just to be sure */ 2846 ieee80211_stop_poll(sdata); 2847 2848 ieee80211_led_assoc(local, 1); 2849 2850 vif_cfg->assoc = 1; 2851 2852 /* Enable ARP filtering */ 2853 if (vif_cfg->arp_addr_cnt) 2854 vif_changed |= BSS_CHANGED_ARP_FILTER; 2855 2856 if (ieee80211_vif_is_mld(&sdata->vif)) { 2857 for (link_id = 0; 2858 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2859 link_id++) { 2860 struct ieee80211_link_data *link; 2861 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2862 2863 if (!cbss || 2864 !(BIT(link_id) & 2865 ieee80211_vif_usable_links(&sdata->vif)) || 2866 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2867 continue; 2868 2869 link = sdata_dereference(sdata->link[link_id], sdata); 2870 if (WARN_ON(!link)) 2871 return; 2872 2873 ieee80211_link_info_change_notify(sdata, link, 2874 changed[link_id]); 2875 2876 ieee80211_recalc_smps(sdata, link); 2877 } 2878 2879 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2880 } else { 2881 ieee80211_bss_info_change_notify(sdata, 2882 vif_changed | changed[0]); 2883 } 2884 2885 ieee80211_recalc_ps(local); 2886 2887 /* leave this here to not change ordering in non-MLO cases */ 2888 if (!ieee80211_vif_is_mld(&sdata->vif)) 2889 ieee80211_recalc_smps(sdata, &sdata->deflink); 2890 ieee80211_recalc_ps_vif(sdata); 2891 2892 netif_carrier_on(sdata->dev); 2893 } 2894 2895 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2896 u16 stype, u16 reason, bool tx, 2897 u8 *frame_buf) 2898 { 2899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2900 struct ieee80211_local *local = sdata->local; 2901 unsigned int link_id; 2902 u64 changed = 0; 2903 struct ieee80211_prep_tx_info info = { 2904 .subtype = stype, 2905 }; 2906 2907 lockdep_assert_wiphy(local->hw.wiphy); 2908 2909 if (WARN_ON_ONCE(tx && !frame_buf)) 2910 return; 2911 2912 if (WARN_ON(!ifmgd->associated)) 2913 return; 2914 2915 ieee80211_stop_poll(sdata); 2916 2917 ifmgd->associated = false; 2918 2919 /* other links will be destroyed */ 2920 sdata->deflink.u.mgd.bss = NULL; 2921 2922 netif_carrier_off(sdata->dev); 2923 2924 /* 2925 * if we want to get out of ps before disassoc (why?) we have 2926 * to do it before sending disassoc, as otherwise the null-packet 2927 * won't be valid. 2928 */ 2929 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2930 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2931 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2932 } 2933 local->ps_sdata = NULL; 2934 2935 /* disable per-vif ps */ 2936 ieee80211_recalc_ps_vif(sdata); 2937 2938 /* make sure ongoing transmission finishes */ 2939 synchronize_net(); 2940 2941 /* 2942 * drop any frame before deauth/disassoc, this can be data or 2943 * management frame. Since we are disconnecting, we should not 2944 * insist sending these frames which can take time and delay 2945 * the disconnection and possible the roaming. 2946 */ 2947 if (tx) 2948 ieee80211_flush_queues(local, sdata, true); 2949 2950 /* deauthenticate/disassociate now */ 2951 if (tx || frame_buf) { 2952 /* 2953 * In multi channel scenarios guarantee that the virtual 2954 * interface is granted immediate airtime to transmit the 2955 * deauthentication frame by calling mgd_prepare_tx, if the 2956 * driver requested so. 2957 */ 2958 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 2959 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 2960 link_id++) { 2961 struct ieee80211_link_data *link; 2962 2963 link = sdata_dereference(sdata->link[link_id], 2964 sdata); 2965 if (!link) 2966 continue; 2967 if (link->u.mgd.have_beacon) 2968 break; 2969 } 2970 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 2971 info.link_id = ffs(sdata->vif.active_links) - 1; 2972 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2973 } 2974 } 2975 2976 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2977 sdata->vif.cfg.ap_addr, stype, 2978 reason, tx, frame_buf); 2979 } 2980 2981 /* flush out frame - make sure the deauth was actually sent */ 2982 if (tx) 2983 ieee80211_flush_queues(local, sdata, false); 2984 2985 drv_mgd_complete_tx(sdata->local, sdata, &info); 2986 2987 /* clear AP addr only after building the needed mgmt frames */ 2988 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2989 eth_zero_addr(sdata->vif.cfg.ap_addr); 2990 2991 sdata->vif.cfg.ssid_len = 0; 2992 2993 /* remove AP and TDLS peers */ 2994 sta_info_flush(sdata); 2995 2996 /* finally reset all BSS / config parameters */ 2997 if (!ieee80211_vif_is_mld(&sdata->vif)) 2998 changed |= ieee80211_reset_erp_info(sdata); 2999 3000 ieee80211_led_assoc(local, 0); 3001 changed |= BSS_CHANGED_ASSOC; 3002 sdata->vif.cfg.assoc = false; 3003 3004 sdata->deflink.u.mgd.p2p_noa_index = -1; 3005 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3006 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3007 3008 /* on the next assoc, re-program HT/VHT parameters */ 3009 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3010 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3011 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3012 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3013 3014 /* 3015 * reset MU-MIMO ownership and group data in default link, 3016 * if used, other links are destroyed 3017 */ 3018 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3019 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3020 memset(sdata->vif.bss_conf.mu_group.position, 0, 3021 sizeof(sdata->vif.bss_conf.mu_group.position)); 3022 if (!ieee80211_vif_is_mld(&sdata->vif)) 3023 changed |= BSS_CHANGED_MU_GROUPS; 3024 sdata->vif.bss_conf.mu_mimo_owner = false; 3025 3026 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3027 3028 del_timer_sync(&local->dynamic_ps_timer); 3029 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3030 3031 /* Disable ARP filtering */ 3032 if (sdata->vif.cfg.arp_addr_cnt) 3033 changed |= BSS_CHANGED_ARP_FILTER; 3034 3035 sdata->vif.bss_conf.qos = false; 3036 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3037 changed |= BSS_CHANGED_QOS; 3038 /* The BSSID (not really interesting) and HT changed */ 3039 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3040 ieee80211_bss_info_change_notify(sdata, changed); 3041 } else { 3042 ieee80211_vif_cfg_change_notify(sdata, changed); 3043 } 3044 3045 /* disassociated - set to defaults now */ 3046 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3047 3048 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3049 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3050 del_timer_sync(&sdata->u.mgd.timer); 3051 3052 sdata->vif.bss_conf.dtim_period = 0; 3053 sdata->vif.bss_conf.beacon_rate = NULL; 3054 3055 sdata->deflink.u.mgd.have_beacon = false; 3056 sdata->deflink.u.mgd.tracking_signal_avg = false; 3057 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3058 3059 ifmgd->flags = 0; 3060 sdata->deflink.u.mgd.conn_flags = 0; 3061 3062 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3063 struct ieee80211_link_data *link; 3064 3065 link = sdata_dereference(sdata->link[link_id], sdata); 3066 if (!link) 3067 continue; 3068 ieee80211_link_release_channel(link); 3069 } 3070 3071 sdata->vif.bss_conf.csa_active = false; 3072 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3073 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3074 if (sdata->deflink.csa_block_tx) { 3075 ieee80211_wake_vif_queues(local, sdata, 3076 IEEE80211_QUEUE_STOP_REASON_CSA); 3077 sdata->deflink.csa_block_tx = false; 3078 } 3079 3080 /* existing TX TSPEC sessions no longer exist */ 3081 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3082 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3083 3084 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3085 sdata->vif.bss_conf.pwr_reduction = 0; 3086 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3087 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3088 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3089 3090 sdata->vif.cfg.eml_cap = 0; 3091 sdata->vif.cfg.eml_med_sync_delay = 0; 3092 sdata->vif.cfg.mld_capa_op = 0; 3093 3094 memset(&sdata->u.mgd.ttlm_info, 0, 3095 sizeof(sdata->u.mgd.ttlm_info)); 3096 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3097 3098 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3099 &ifmgd->neg_ttlm_timeout_work); 3100 ieee80211_vif_set_links(sdata, 0, 0); 3101 } 3102 3103 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3104 { 3105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3106 struct ieee80211_local *local = sdata->local; 3107 3108 lockdep_assert_wiphy(local->hw.wiphy); 3109 3110 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3111 return; 3112 3113 __ieee80211_stop_poll(sdata); 3114 3115 ieee80211_recalc_ps(local); 3116 3117 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3118 return; 3119 3120 /* 3121 * We've received a probe response, but are not sure whether 3122 * we have or will be receiving any beacons or data, so let's 3123 * schedule the timers again, just in case. 3124 */ 3125 ieee80211_sta_reset_beacon_monitor(sdata); 3126 3127 mod_timer(&ifmgd->conn_mon_timer, 3128 round_jiffies_up(jiffies + 3129 IEEE80211_CONNECTION_IDLE_TIME)); 3130 } 3131 3132 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3133 struct ieee80211_hdr *hdr, 3134 u16 tx_time) 3135 { 3136 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3137 u16 tid; 3138 int ac; 3139 struct ieee80211_sta_tx_tspec *tx_tspec; 3140 unsigned long now = jiffies; 3141 3142 if (!ieee80211_is_data_qos(hdr->frame_control)) 3143 return; 3144 3145 tid = ieee80211_get_tid(hdr); 3146 ac = ieee80211_ac_from_tid(tid); 3147 tx_tspec = &ifmgd->tx_tspec[ac]; 3148 3149 if (likely(!tx_tspec->admitted_time)) 3150 return; 3151 3152 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3153 tx_tspec->consumed_tx_time = 0; 3154 tx_tspec->time_slice_start = now; 3155 3156 if (tx_tspec->downgraded) { 3157 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3158 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3159 &ifmgd->tx_tspec_wk, 0); 3160 } 3161 } 3162 3163 if (tx_tspec->downgraded) 3164 return; 3165 3166 tx_tspec->consumed_tx_time += tx_time; 3167 3168 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3169 tx_tspec->downgraded = true; 3170 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3171 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3172 &ifmgd->tx_tspec_wk, 0); 3173 } 3174 } 3175 3176 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3177 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3178 { 3179 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3180 3181 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3182 !sdata->u.mgd.probe_send_count) 3183 return; 3184 3185 if (ack) 3186 sdata->u.mgd.probe_send_count = 0; 3187 else 3188 sdata->u.mgd.nullfunc_failed = true; 3189 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3190 } 3191 3192 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3193 const u8 *src, const u8 *dst, 3194 const u8 *ssid, size_t ssid_len, 3195 struct ieee80211_channel *channel) 3196 { 3197 struct sk_buff *skb; 3198 3199 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3200 ssid, ssid_len, NULL, 0, 3201 IEEE80211_PROBE_FLAG_DIRECTED); 3202 if (skb) 3203 ieee80211_tx_skb(sdata, skb); 3204 } 3205 3206 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3207 { 3208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3209 u8 *dst = sdata->vif.cfg.ap_addr; 3210 u8 unicast_limit = max(1, max_probe_tries - 3); 3211 struct sta_info *sta; 3212 3213 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3214 3215 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3216 return; 3217 3218 /* 3219 * Try sending broadcast probe requests for the last three 3220 * probe requests after the first ones failed since some 3221 * buggy APs only support broadcast probe requests. 3222 */ 3223 if (ifmgd->probe_send_count >= unicast_limit) 3224 dst = NULL; 3225 3226 /* 3227 * When the hardware reports an accurate Tx ACK status, it's 3228 * better to send a nullfunc frame instead of a probe request, 3229 * as it will kick us off the AP quickly if we aren't associated 3230 * anymore. The timeout will be reset if the frame is ACKed by 3231 * the AP. 3232 */ 3233 ifmgd->probe_send_count++; 3234 3235 if (dst) { 3236 sta = sta_info_get(sdata, dst); 3237 if (!WARN_ON(!sta)) 3238 ieee80211_check_fast_rx(sta); 3239 } 3240 3241 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3242 ifmgd->nullfunc_failed = false; 3243 ieee80211_send_nullfunc(sdata->local, sdata, false); 3244 } else { 3245 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3246 sdata->vif.cfg.ssid, 3247 sdata->vif.cfg.ssid_len, 3248 sdata->deflink.u.mgd.bss->channel); 3249 } 3250 3251 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3252 run_again(sdata, ifmgd->probe_timeout); 3253 } 3254 3255 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3256 bool beacon) 3257 { 3258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3259 bool already = false; 3260 3261 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3262 3263 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3264 return; 3265 3266 if (!ieee80211_sdata_running(sdata)) 3267 return; 3268 3269 if (!ifmgd->associated) 3270 return; 3271 3272 if (sdata->local->tmp_channel || sdata->local->scanning) 3273 return; 3274 3275 if (sdata->local->suspending) { 3276 /* reschedule after resume */ 3277 ieee80211_reset_ap_probe(sdata); 3278 return; 3279 } 3280 3281 if (beacon) { 3282 mlme_dbg_ratelimited(sdata, 3283 "detected beacon loss from AP (missed %d beacons) - probing\n", 3284 beacon_loss_count); 3285 3286 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3287 } 3288 3289 /* 3290 * The driver/our work has already reported this event or the 3291 * connection monitoring has kicked in and we have already sent 3292 * a probe request. Or maybe the AP died and the driver keeps 3293 * reporting until we disassociate... 3294 * 3295 * In either case we have to ignore the current call to this 3296 * function (except for setting the correct probe reason bit) 3297 * because otherwise we would reset the timer every time and 3298 * never check whether we received a probe response! 3299 */ 3300 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3301 already = true; 3302 3303 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3304 3305 if (already) 3306 return; 3307 3308 ieee80211_recalc_ps(sdata->local); 3309 3310 ifmgd->probe_send_count = 0; 3311 ieee80211_mgd_probe_ap_send(sdata); 3312 } 3313 3314 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3315 struct ieee80211_vif *vif) 3316 { 3317 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3319 struct cfg80211_bss *cbss; 3320 struct sk_buff *skb; 3321 const struct element *ssid; 3322 int ssid_len; 3323 3324 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3325 3326 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3327 ieee80211_vif_is_mld(&sdata->vif))) 3328 return NULL; 3329 3330 if (ifmgd->associated) 3331 cbss = sdata->deflink.u.mgd.bss; 3332 else if (ifmgd->auth_data) 3333 cbss = ifmgd->auth_data->bss; 3334 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3335 cbss = ifmgd->assoc_data->link[0].bss; 3336 else 3337 return NULL; 3338 3339 rcu_read_lock(); 3340 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3341 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3342 "invalid SSID element (len=%d)", 3343 ssid ? ssid->datalen : -1)) 3344 ssid_len = 0; 3345 else 3346 ssid_len = ssid->datalen; 3347 3348 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3349 (u32) -1, cbss->channel, 3350 ssid->data, ssid_len, 3351 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3352 rcu_read_unlock(); 3353 3354 return skb; 3355 } 3356 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3357 3358 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3359 const u8 *buf, size_t len, bool tx, 3360 u16 reason, bool reconnect) 3361 { 3362 struct ieee80211_event event = { 3363 .type = MLME_EVENT, 3364 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3365 .u.mlme.reason = reason, 3366 }; 3367 3368 if (tx) 3369 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3370 else 3371 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3372 3373 drv_event_callback(sdata->local, sdata, &event); 3374 } 3375 3376 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3377 { 3378 struct ieee80211_local *local = sdata->local; 3379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3380 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3381 bool tx; 3382 3383 lockdep_assert_wiphy(local->hw.wiphy); 3384 3385 if (!ifmgd->associated) 3386 return; 3387 3388 /* in MLO assume we have a link where we can TX the frame */ 3389 tx = ieee80211_vif_is_mld(&sdata->vif) || 3390 !sdata->deflink.csa_block_tx; 3391 3392 if (!ifmgd->driver_disconnect) { 3393 unsigned int link_id; 3394 3395 /* 3396 * AP is probably out of range (or not reachable for another 3397 * reason) so remove the bss structs for that AP. In the case 3398 * of multi-link, it's not clear that all of them really are 3399 * out of range, but if they weren't the driver likely would 3400 * have switched to just have a single link active? 3401 */ 3402 for (link_id = 0; 3403 link_id < ARRAY_SIZE(sdata->link); 3404 link_id++) { 3405 struct ieee80211_link_data *link; 3406 3407 link = sdata_dereference(sdata->link[link_id], sdata); 3408 if (!link) 3409 continue; 3410 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3411 link->u.mgd.bss = NULL; 3412 } 3413 } 3414 3415 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3416 ifmgd->driver_disconnect ? 3417 WLAN_REASON_DEAUTH_LEAVING : 3418 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3419 tx, frame_buf); 3420 /* the other links will be destroyed */ 3421 sdata->vif.bss_conf.csa_active = false; 3422 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3423 if (sdata->deflink.csa_block_tx) { 3424 ieee80211_wake_vif_queues(local, sdata, 3425 IEEE80211_QUEUE_STOP_REASON_CSA); 3426 sdata->deflink.csa_block_tx = false; 3427 } 3428 3429 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3430 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3431 ifmgd->reconnect); 3432 ifmgd->reconnect = false; 3433 } 3434 3435 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3436 struct wiphy_work *work) 3437 { 3438 struct ieee80211_sub_if_data *sdata = 3439 container_of(work, struct ieee80211_sub_if_data, 3440 u.mgd.beacon_connection_loss_work); 3441 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3442 3443 if (ifmgd->connection_loss) { 3444 sdata_info(sdata, "Connection to AP %pM lost\n", 3445 sdata->vif.cfg.ap_addr); 3446 __ieee80211_disconnect(sdata); 3447 ifmgd->connection_loss = false; 3448 } else if (ifmgd->driver_disconnect) { 3449 sdata_info(sdata, 3450 "Driver requested disconnection from AP %pM\n", 3451 sdata->vif.cfg.ap_addr); 3452 __ieee80211_disconnect(sdata); 3453 ifmgd->driver_disconnect = false; 3454 } else { 3455 if (ifmgd->associated) 3456 sdata->deflink.u.mgd.beacon_loss_count++; 3457 ieee80211_mgd_probe_ap(sdata, true); 3458 } 3459 } 3460 3461 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3462 struct wiphy_work *work) 3463 { 3464 struct ieee80211_sub_if_data *sdata = 3465 container_of(work, struct ieee80211_sub_if_data, 3466 u.mgd.csa_connection_drop_work); 3467 3468 __ieee80211_disconnect(sdata); 3469 } 3470 3471 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3472 { 3473 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3474 struct ieee80211_hw *hw = &sdata->local->hw; 3475 3476 trace_api_beacon_loss(sdata); 3477 3478 sdata->u.mgd.connection_loss = false; 3479 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3480 } 3481 EXPORT_SYMBOL(ieee80211_beacon_loss); 3482 3483 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3484 { 3485 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3486 struct ieee80211_hw *hw = &sdata->local->hw; 3487 3488 trace_api_connection_loss(sdata); 3489 3490 sdata->u.mgd.connection_loss = true; 3491 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3492 } 3493 EXPORT_SYMBOL(ieee80211_connection_loss); 3494 3495 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3496 { 3497 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3498 struct ieee80211_hw *hw = &sdata->local->hw; 3499 3500 trace_api_disconnect(sdata, reconnect); 3501 3502 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3503 return; 3504 3505 sdata->u.mgd.driver_disconnect = true; 3506 sdata->u.mgd.reconnect = reconnect; 3507 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3508 } 3509 EXPORT_SYMBOL(ieee80211_disconnect); 3510 3511 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3512 bool assoc) 3513 { 3514 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3515 3516 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3517 3518 if (!assoc) { 3519 /* 3520 * we are not authenticated yet, the only timer that could be 3521 * running is the timeout for the authentication response which 3522 * which is not relevant anymore. 3523 */ 3524 del_timer_sync(&sdata->u.mgd.timer); 3525 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3526 3527 /* other links are destroyed */ 3528 sdata->deflink.u.mgd.conn_flags = 0; 3529 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3530 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3531 BSS_CHANGED_BSSID); 3532 sdata->u.mgd.flags = 0; 3533 3534 ieee80211_link_release_channel(&sdata->deflink); 3535 ieee80211_vif_set_links(sdata, 0, 0); 3536 } 3537 3538 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3539 kfree(auth_data); 3540 sdata->u.mgd.auth_data = NULL; 3541 } 3542 3543 enum assoc_status { 3544 ASSOC_SUCCESS, 3545 ASSOC_REJECTED, 3546 ASSOC_TIMEOUT, 3547 ASSOC_ABANDON, 3548 }; 3549 3550 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3551 enum assoc_status status) 3552 { 3553 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3554 3555 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3556 3557 if (status != ASSOC_SUCCESS) { 3558 /* 3559 * we are not associated yet, the only timer that could be 3560 * running is the timeout for the association response which 3561 * which is not relevant anymore. 3562 */ 3563 del_timer_sync(&sdata->u.mgd.timer); 3564 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3565 3566 sdata->deflink.u.mgd.conn_flags = 0; 3567 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3568 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3569 BSS_CHANGED_BSSID); 3570 sdata->u.mgd.flags = 0; 3571 sdata->vif.bss_conf.mu_mimo_owner = false; 3572 3573 if (status != ASSOC_REJECTED) { 3574 struct cfg80211_assoc_failure data = { 3575 .timeout = status == ASSOC_TIMEOUT, 3576 }; 3577 int i; 3578 3579 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3580 ARRAY_SIZE(assoc_data->link)); 3581 3582 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3583 data.bss[i] = assoc_data->link[i].bss; 3584 3585 if (ieee80211_vif_is_mld(&sdata->vif)) 3586 data.ap_mld_addr = assoc_data->ap_addr; 3587 3588 cfg80211_assoc_failure(sdata->dev, &data); 3589 } 3590 3591 ieee80211_link_release_channel(&sdata->deflink); 3592 ieee80211_vif_set_links(sdata, 0, 0); 3593 } 3594 3595 kfree(assoc_data); 3596 sdata->u.mgd.assoc_data = NULL; 3597 } 3598 3599 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3600 struct ieee80211_mgmt *mgmt, size_t len) 3601 { 3602 struct ieee80211_local *local = sdata->local; 3603 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3604 const struct element *challenge; 3605 u8 *pos; 3606 u32 tx_flags = 0; 3607 struct ieee80211_prep_tx_info info = { 3608 .subtype = IEEE80211_STYPE_AUTH, 3609 .link_id = auth_data->link_id, 3610 }; 3611 3612 pos = mgmt->u.auth.variable; 3613 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3614 len - (pos - (u8 *)mgmt)); 3615 if (!challenge) 3616 return; 3617 auth_data->expected_transaction = 4; 3618 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3619 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3620 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3621 IEEE80211_TX_INTFL_MLME_CONN_TX; 3622 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3623 (void *)challenge, 3624 challenge->datalen + sizeof(*challenge), 3625 auth_data->ap_addr, auth_data->ap_addr, 3626 auth_data->key, auth_data->key_len, 3627 auth_data->key_idx, tx_flags); 3628 } 3629 3630 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3631 { 3632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3633 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3634 struct sta_info *sta; 3635 3636 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3637 3638 sdata_info(sdata, "authenticated\n"); 3639 ifmgd->auth_data->done = true; 3640 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3641 ifmgd->auth_data->timeout_started = true; 3642 run_again(sdata, ifmgd->auth_data->timeout); 3643 3644 /* move station state to auth */ 3645 sta = sta_info_get(sdata, ap_addr); 3646 if (!sta) { 3647 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3648 return false; 3649 } 3650 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3651 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3652 return false; 3653 } 3654 3655 return true; 3656 } 3657 3658 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3659 struct ieee80211_mgmt *mgmt, size_t len) 3660 { 3661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3662 u16 auth_alg, auth_transaction, status_code; 3663 struct ieee80211_event event = { 3664 .type = MLME_EVENT, 3665 .u.mlme.data = AUTH_EVENT, 3666 }; 3667 struct ieee80211_prep_tx_info info = { 3668 .subtype = IEEE80211_STYPE_AUTH, 3669 }; 3670 3671 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3672 3673 if (len < 24 + 6) 3674 return; 3675 3676 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3677 return; 3678 3679 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3680 return; 3681 3682 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3683 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3684 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3685 3686 if (auth_alg != ifmgd->auth_data->algorithm || 3687 (auth_alg != WLAN_AUTH_SAE && 3688 auth_transaction != ifmgd->auth_data->expected_transaction) || 3689 (auth_alg == WLAN_AUTH_SAE && 3690 (auth_transaction < ifmgd->auth_data->expected_transaction || 3691 auth_transaction > 2))) { 3692 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3693 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3694 auth_transaction, 3695 ifmgd->auth_data->expected_transaction); 3696 goto notify_driver; 3697 } 3698 3699 if (status_code != WLAN_STATUS_SUCCESS) { 3700 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3701 3702 if (auth_alg == WLAN_AUTH_SAE && 3703 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3704 (auth_transaction == 1 && 3705 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3706 status_code == WLAN_STATUS_SAE_PK)))) { 3707 /* waiting for userspace now */ 3708 ifmgd->auth_data->waiting = true; 3709 ifmgd->auth_data->timeout = 3710 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3711 ifmgd->auth_data->timeout_started = true; 3712 run_again(sdata, ifmgd->auth_data->timeout); 3713 goto notify_driver; 3714 } 3715 3716 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3717 mgmt->sa, status_code); 3718 ieee80211_destroy_auth_data(sdata, false); 3719 event.u.mlme.status = MLME_DENIED; 3720 event.u.mlme.reason = status_code; 3721 drv_event_callback(sdata->local, sdata, &event); 3722 goto notify_driver; 3723 } 3724 3725 switch (ifmgd->auth_data->algorithm) { 3726 case WLAN_AUTH_OPEN: 3727 case WLAN_AUTH_LEAP: 3728 case WLAN_AUTH_FT: 3729 case WLAN_AUTH_SAE: 3730 case WLAN_AUTH_FILS_SK: 3731 case WLAN_AUTH_FILS_SK_PFS: 3732 case WLAN_AUTH_FILS_PK: 3733 break; 3734 case WLAN_AUTH_SHARED_KEY: 3735 if (ifmgd->auth_data->expected_transaction != 4) { 3736 ieee80211_auth_challenge(sdata, mgmt, len); 3737 /* need another frame */ 3738 return; 3739 } 3740 break; 3741 default: 3742 WARN_ONCE(1, "invalid auth alg %d", 3743 ifmgd->auth_data->algorithm); 3744 goto notify_driver; 3745 } 3746 3747 event.u.mlme.status = MLME_SUCCESS; 3748 info.success = 1; 3749 drv_event_callback(sdata->local, sdata, &event); 3750 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3751 (auth_transaction == 2 && 3752 ifmgd->auth_data->expected_transaction == 2)) { 3753 if (!ieee80211_mark_sta_auth(sdata)) 3754 return; /* ignore frame -- wait for timeout */ 3755 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3756 auth_transaction == 2) { 3757 sdata_info(sdata, "SAE peer confirmed\n"); 3758 ifmgd->auth_data->peer_confirmed = true; 3759 } 3760 3761 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3762 notify_driver: 3763 drv_mgd_complete_tx(sdata->local, sdata, &info); 3764 } 3765 3766 #define case_WLAN(type) \ 3767 case WLAN_REASON_##type: return #type 3768 3769 const char *ieee80211_get_reason_code_string(u16 reason_code) 3770 { 3771 switch (reason_code) { 3772 case_WLAN(UNSPECIFIED); 3773 case_WLAN(PREV_AUTH_NOT_VALID); 3774 case_WLAN(DEAUTH_LEAVING); 3775 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3776 case_WLAN(DISASSOC_AP_BUSY); 3777 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3778 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3779 case_WLAN(DISASSOC_STA_HAS_LEFT); 3780 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3781 case_WLAN(DISASSOC_BAD_POWER); 3782 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3783 case_WLAN(INVALID_IE); 3784 case_WLAN(MIC_FAILURE); 3785 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3786 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3787 case_WLAN(IE_DIFFERENT); 3788 case_WLAN(INVALID_GROUP_CIPHER); 3789 case_WLAN(INVALID_PAIRWISE_CIPHER); 3790 case_WLAN(INVALID_AKMP); 3791 case_WLAN(UNSUPP_RSN_VERSION); 3792 case_WLAN(INVALID_RSN_IE_CAP); 3793 case_WLAN(IEEE8021X_FAILED); 3794 case_WLAN(CIPHER_SUITE_REJECTED); 3795 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3796 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3797 case_WLAN(DISASSOC_LOW_ACK); 3798 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3799 case_WLAN(QSTA_LEAVE_QBSS); 3800 case_WLAN(QSTA_NOT_USE); 3801 case_WLAN(QSTA_REQUIRE_SETUP); 3802 case_WLAN(QSTA_TIMEOUT); 3803 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3804 case_WLAN(MESH_PEER_CANCELED); 3805 case_WLAN(MESH_MAX_PEERS); 3806 case_WLAN(MESH_CONFIG); 3807 case_WLAN(MESH_CLOSE); 3808 case_WLAN(MESH_MAX_RETRIES); 3809 case_WLAN(MESH_CONFIRM_TIMEOUT); 3810 case_WLAN(MESH_INVALID_GTK); 3811 case_WLAN(MESH_INCONSISTENT_PARAM); 3812 case_WLAN(MESH_INVALID_SECURITY); 3813 case_WLAN(MESH_PATH_ERROR); 3814 case_WLAN(MESH_PATH_NOFORWARD); 3815 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3816 case_WLAN(MAC_EXISTS_IN_MBSS); 3817 case_WLAN(MESH_CHAN_REGULATORY); 3818 case_WLAN(MESH_CHAN); 3819 default: return "<unknown>"; 3820 } 3821 } 3822 3823 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3824 struct ieee80211_mgmt *mgmt, size_t len) 3825 { 3826 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3827 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3828 3829 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3830 3831 if (len < 24 + 2) 3832 return; 3833 3834 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3835 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3836 return; 3837 } 3838 3839 if (ifmgd->associated && 3840 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3841 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3842 sdata->vif.cfg.ap_addr, reason_code, 3843 ieee80211_get_reason_code_string(reason_code)); 3844 3845 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3846 3847 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3848 reason_code, false); 3849 return; 3850 } 3851 3852 if (ifmgd->assoc_data && 3853 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3854 sdata_info(sdata, 3855 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3856 ifmgd->assoc_data->ap_addr, reason_code, 3857 ieee80211_get_reason_code_string(reason_code)); 3858 3859 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3860 3861 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3862 return; 3863 } 3864 } 3865 3866 3867 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3868 struct ieee80211_mgmt *mgmt, size_t len) 3869 { 3870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3871 u16 reason_code; 3872 3873 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3874 3875 if (len < 24 + 2) 3876 return; 3877 3878 if (!ifmgd->associated || 3879 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3880 return; 3881 3882 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3883 3884 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3885 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3886 return; 3887 } 3888 3889 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3890 sdata->vif.cfg.ap_addr, reason_code, 3891 ieee80211_get_reason_code_string(reason_code)); 3892 3893 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3894 3895 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3896 false); 3897 } 3898 3899 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3900 u8 *supp_rates, unsigned int supp_rates_len, 3901 u32 *rates, u32 *basic_rates, 3902 bool *have_higher_than_11mbit, 3903 int *min_rate, int *min_rate_index) 3904 { 3905 int i, j; 3906 3907 for (i = 0; i < supp_rates_len; i++) { 3908 int rate = supp_rates[i] & 0x7f; 3909 bool is_basic = !!(supp_rates[i] & 0x80); 3910 3911 if ((rate * 5) > 110) 3912 *have_higher_than_11mbit = true; 3913 3914 /* 3915 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 3916 * selectors since they're not rates. 3917 * 3918 * Note: Even though the membership selector and the basic 3919 * rate flag share the same bit, they are not exactly 3920 * the same. 3921 */ 3922 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3923 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3924 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3925 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 3926 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3927 continue; 3928 3929 for (j = 0; j < sband->n_bitrates; j++) { 3930 struct ieee80211_rate *br; 3931 int brate; 3932 3933 br = &sband->bitrates[j]; 3934 3935 brate = DIV_ROUND_UP(br->bitrate, 5); 3936 if (brate == rate) { 3937 *rates |= BIT(j); 3938 if (is_basic) 3939 *basic_rates |= BIT(j); 3940 if ((rate * 5) < *min_rate) { 3941 *min_rate = rate * 5; 3942 *min_rate_index = j; 3943 } 3944 break; 3945 } 3946 } 3947 } 3948 } 3949 3950 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3951 struct ieee80211_supported_band *sband, 3952 const struct link_sta_info *link_sta, 3953 const struct ieee802_11_elems *elems) 3954 { 3955 const struct ieee80211_sta_he_cap *own_he_cap = 3956 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3957 3958 if (elems->ext_capab_len < 10) 3959 return false; 3960 3961 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3962 return false; 3963 3964 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3965 IEEE80211_HE_MAC_CAP0_TWT_RES && 3966 own_he_cap && 3967 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3968 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3969 } 3970 3971 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3972 struct ieee80211_supported_band *sband, 3973 struct ieee80211_link_data *link, 3974 struct link_sta_info *link_sta, 3975 struct ieee802_11_elems *elems) 3976 { 3977 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3978 3979 if (link->conf->twt_requester != twt) { 3980 link->conf->twt_requester = twt; 3981 return BSS_CHANGED_TWT; 3982 } 3983 return 0; 3984 } 3985 3986 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3987 struct ieee80211_bss_conf *bss_conf, 3988 struct ieee80211_supported_band *sband, 3989 struct link_sta_info *link_sta) 3990 { 3991 const struct ieee80211_sta_he_cap *own_he_cap = 3992 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3993 3994 return bss_conf->he_support && 3995 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3996 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3997 own_he_cap && 3998 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3999 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4000 } 4001 4002 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4003 struct link_sta_info *link_sta, 4004 struct cfg80211_bss *cbss, 4005 struct ieee80211_mgmt *mgmt, 4006 const u8 *elem_start, 4007 unsigned int elem_len, 4008 u64 *changed) 4009 { 4010 struct ieee80211_sub_if_data *sdata = link->sdata; 4011 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4012 struct ieee80211_bss_conf *bss_conf = link->conf; 4013 struct ieee80211_local *local = sdata->local; 4014 unsigned int link_id = link->link_id; 4015 struct ieee80211_elems_parse_params parse_params = { 4016 .start = elem_start, 4017 .len = elem_len, 4018 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4019 .from_ap = true, 4020 }; 4021 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4022 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4023 const struct cfg80211_bss_ies *bss_ies = NULL; 4024 struct ieee80211_supported_band *sband; 4025 struct ieee802_11_elems *elems; 4026 const __le16 prof_bss_param_ch_present = 4027 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4028 u16 capab_info; 4029 bool ret; 4030 4031 elems = ieee802_11_parse_elems_full(&parse_params); 4032 if (!elems) 4033 return false; 4034 4035 if (link_id == assoc_data->assoc_link_id) { 4036 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4037 4038 /* 4039 * we should not get to this flow unless the association was 4040 * successful, so set the status directly to success 4041 */ 4042 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4043 if (elems->ml_basic) { 4044 if (!(elems->ml_basic->control & 4045 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT))) { 4046 ret = false; 4047 goto out; 4048 } 4049 link->u.mgd.bss_param_ch_cnt = 4050 ieee80211_mle_get_bss_param_ch_cnt(elems->ml_basic); 4051 } 4052 } else if (!elems->prof || 4053 !(elems->prof->control & prof_bss_param_ch_present)) { 4054 ret = false; 4055 goto out; 4056 } else { 4057 const u8 *ptr = elems->prof->variable + 4058 elems->prof->sta_info_len - 1; 4059 4060 /* 4061 * During parsing, we validated that these fields exist, 4062 * otherwise elems->prof would have been set to NULL. 4063 */ 4064 capab_info = get_unaligned_le16(ptr); 4065 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4066 link->u.mgd.bss_param_ch_cnt = 4067 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4068 4069 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4070 link_info(link, "association response status code=%u\n", 4071 assoc_data->link[link_id].status); 4072 ret = true; 4073 goto out; 4074 } 4075 } 4076 4077 if (!is_s1g && !elems->supp_rates) { 4078 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4079 ret = false; 4080 goto out; 4081 } 4082 4083 link->u.mgd.tdls_chan_switch_prohibited = 4084 elems->ext_capab && elems->ext_capab_len >= 5 && 4085 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4086 4087 /* 4088 * Some APs are erroneously not including some information in their 4089 * (re)association response frames. Try to recover by using the data 4090 * from the beacon or probe response. This seems to afflict mobile 4091 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4092 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4093 */ 4094 if (!is_6ghz && 4095 ((assoc_data->wmm && !elems->wmm_param) || 4096 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4097 (!elems->ht_cap_elem || !elems->ht_operation)) || 4098 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4099 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4100 const struct cfg80211_bss_ies *ies; 4101 struct ieee802_11_elems *bss_elems; 4102 4103 rcu_read_lock(); 4104 ies = rcu_dereference(cbss->ies); 4105 if (ies) 4106 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4107 GFP_ATOMIC); 4108 rcu_read_unlock(); 4109 if (!bss_ies) { 4110 ret = false; 4111 goto out; 4112 } 4113 4114 parse_params.start = bss_ies->data; 4115 parse_params.len = bss_ies->len; 4116 parse_params.bss = cbss; 4117 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4118 if (!bss_elems) { 4119 ret = false; 4120 goto out; 4121 } 4122 4123 if (assoc_data->wmm && 4124 !elems->wmm_param && bss_elems->wmm_param) { 4125 elems->wmm_param = bss_elems->wmm_param; 4126 sdata_info(sdata, 4127 "AP bug: WMM param missing from AssocResp\n"); 4128 } 4129 4130 /* 4131 * Also check if we requested HT/VHT, otherwise the AP doesn't 4132 * have to include the IEs in the (re)association response. 4133 */ 4134 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4135 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4136 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4137 sdata_info(sdata, 4138 "AP bug: HT capability missing from AssocResp\n"); 4139 } 4140 if (!elems->ht_operation && bss_elems->ht_operation && 4141 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4142 elems->ht_operation = bss_elems->ht_operation; 4143 sdata_info(sdata, 4144 "AP bug: HT operation missing from AssocResp\n"); 4145 } 4146 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4147 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4148 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4149 sdata_info(sdata, 4150 "AP bug: VHT capa missing from AssocResp\n"); 4151 } 4152 if (!elems->vht_operation && bss_elems->vht_operation && 4153 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4154 elems->vht_operation = bss_elems->vht_operation; 4155 sdata_info(sdata, 4156 "AP bug: VHT operation missing from AssocResp\n"); 4157 } 4158 4159 kfree(bss_elems); 4160 } 4161 4162 /* 4163 * We previously checked these in the beacon/probe response, so 4164 * they should be present here. This is just a safety net. 4165 */ 4166 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4167 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4168 sdata_info(sdata, 4169 "HT AP is missing WMM params or HT capability/operation\n"); 4170 ret = false; 4171 goto out; 4172 } 4173 4174 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4175 (!elems->vht_cap_elem || !elems->vht_operation)) { 4176 sdata_info(sdata, 4177 "VHT AP is missing VHT capability/operation\n"); 4178 ret = false; 4179 goto out; 4180 } 4181 4182 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4183 !elems->he_6ghz_capa) { 4184 sdata_info(sdata, 4185 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4186 ret = false; 4187 goto out; 4188 } 4189 4190 if (WARN_ON(!link->conf->chandef.chan)) { 4191 ret = false; 4192 goto out; 4193 } 4194 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4195 4196 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4197 (!elems->he_cap || !elems->he_operation)) { 4198 sdata_info(sdata, 4199 "HE AP is missing HE capability/operation\n"); 4200 ret = false; 4201 goto out; 4202 } 4203 4204 /* Set up internal HT/VHT capabilities */ 4205 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4206 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4207 elems->ht_cap_elem, 4208 link_sta); 4209 4210 if (elems->vht_cap_elem && 4211 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4212 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4213 const struct cfg80211_bss_ies *ies; 4214 4215 /* 4216 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4217 * too large maximum MPDU length in the association response 4218 * (indicating 12k) that it cannot actually process ... 4219 * Work around that. 4220 */ 4221 rcu_read_lock(); 4222 ies = rcu_dereference(cbss->ies); 4223 if (ies) { 4224 const struct element *elem; 4225 4226 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4227 ies->data, ies->len); 4228 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4229 bss_vht_cap = (const void *)elem->data; 4230 } 4231 4232 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4233 elems->vht_cap_elem, 4234 bss_vht_cap, link_sta); 4235 rcu_read_unlock(); 4236 } 4237 4238 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4239 elems->he_cap) { 4240 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 4241 4242 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4243 elems->he_cap, 4244 elems->he_cap_len, 4245 elems->he_6ghz_capa, 4246 link_sta); 4247 4248 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 4249 4250 if (is_6ghz && he_6ghz_oper) { 4251 switch (u8_get_bits(he_6ghz_oper->control, 4252 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 4253 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 4254 bss_conf->power_type = IEEE80211_REG_LPI_AP; 4255 break; 4256 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 4257 bss_conf->power_type = IEEE80211_REG_SP_AP; 4258 break; 4259 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 4260 bss_conf->power_type = IEEE80211_REG_VLP_AP; 4261 break; 4262 default: 4263 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 4264 break; 4265 } 4266 } else if (is_6ghz) { 4267 link_info(link, 4268 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 4269 bss_conf->chandef.chan->center_freq); 4270 } 4271 4272 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4273 if (elems->rsnx && elems->rsnx_len && 4274 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4275 wiphy_ext_feature_isset(local->hw.wiphy, 4276 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4277 bss_conf->twt_protected = true; 4278 else 4279 bss_conf->twt_protected = false; 4280 4281 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4282 link_sta, elems); 4283 4284 if (elems->eht_operation && elems->eht_cap && 4285 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4286 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4287 elems->he_cap, 4288 elems->he_cap_len, 4289 elems->eht_cap, 4290 elems->eht_cap_len, 4291 link_sta); 4292 4293 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4294 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4295 } else { 4296 bss_conf->eht_support = false; 4297 } 4298 } else { 4299 bss_conf->he_support = false; 4300 bss_conf->twt_requester = false; 4301 bss_conf->twt_protected = false; 4302 bss_conf->eht_support = false; 4303 } 4304 4305 bss_conf->twt_broadcast = 4306 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4307 4308 if (bss_conf->he_support) { 4309 bss_conf->he_bss_color.color = 4310 le32_get_bits(elems->he_operation->he_oper_params, 4311 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4312 bss_conf->he_bss_color.partial = 4313 le32_get_bits(elems->he_operation->he_oper_params, 4314 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4315 bss_conf->he_bss_color.enabled = 4316 !le32_get_bits(elems->he_operation->he_oper_params, 4317 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4318 4319 if (bss_conf->he_bss_color.enabled) 4320 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4321 4322 bss_conf->htc_trig_based_pkt_ext = 4323 le32_get_bits(elems->he_operation->he_oper_params, 4324 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4325 bss_conf->frame_time_rts_th = 4326 le32_get_bits(elems->he_operation->he_oper_params, 4327 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4328 4329 bss_conf->uora_exists = !!elems->uora_element; 4330 if (elems->uora_element) 4331 bss_conf->uora_ocw_range = elems->uora_element[0]; 4332 4333 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4334 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4335 /* TODO: OPEN: what happens if BSS color disable is set? */ 4336 } 4337 4338 if (cbss->transmitted_bss) { 4339 bss_conf->nontransmitted = true; 4340 ether_addr_copy(bss_conf->transmitter_bssid, 4341 cbss->transmitted_bss->bssid); 4342 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4343 bss_conf->bssid_index = cbss->bssid_index; 4344 } 4345 4346 /* 4347 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4348 * in their association response, so ignore that data for our own 4349 * configuration. If it changed since the last beacon, we'll get the 4350 * next beacon and update then. 4351 */ 4352 4353 /* 4354 * If an operating mode notification IE is present, override the 4355 * NSS calculation (that would be done in rate_control_rate_init()) 4356 * and use the # of streams from that element. 4357 */ 4358 if (elems->opmode_notif && 4359 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4360 u8 nss; 4361 4362 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4363 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4364 nss += 1; 4365 link_sta->pub->rx_nss = nss; 4366 } 4367 4368 /* 4369 * Always handle WMM once after association regardless 4370 * of the first value the AP uses. Setting -1 here has 4371 * that effect because the AP values is an unsigned 4372 * 4-bit value. 4373 */ 4374 link->u.mgd.wmm_last_param_set = -1; 4375 link->u.mgd.mu_edca_last_param_set = -1; 4376 4377 if (link->u.mgd.disable_wmm_tracking) { 4378 ieee80211_set_wmm_default(link, false, false); 4379 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4380 elems->wmm_param_len, 4381 elems->mu_edca_param_set)) { 4382 /* still enable QoS since we might have HT/VHT */ 4383 ieee80211_set_wmm_default(link, false, true); 4384 /* disable WMM tracking in this case to disable 4385 * tracking WMM parameter changes in the beacon if 4386 * the parameters weren't actually valid. Doing so 4387 * avoids changing parameters very strangely when 4388 * the AP is going back and forth between valid and 4389 * invalid parameters. 4390 */ 4391 link->u.mgd.disable_wmm_tracking = true; 4392 } 4393 4394 if (elems->max_idle_period_ie) { 4395 bss_conf->max_idle_period = 4396 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4397 bss_conf->protected_keep_alive = 4398 !!(elems->max_idle_period_ie->idle_options & 4399 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4400 *changed |= BSS_CHANGED_KEEP_ALIVE; 4401 } else { 4402 bss_conf->max_idle_period = 0; 4403 bss_conf->protected_keep_alive = false; 4404 } 4405 4406 /* set assoc capability (AID was already set earlier), 4407 * ieee80211_set_associated() will tell the driver */ 4408 bss_conf->assoc_capability = capab_info; 4409 4410 ret = true; 4411 out: 4412 kfree(elems); 4413 kfree(bss_ies); 4414 return ret; 4415 } 4416 4417 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4418 struct sta_info *sta, 4419 struct link_sta_info *link_sta, 4420 struct cfg80211_bss *cbss) 4421 { 4422 struct ieee80211_sub_if_data *sdata = link->sdata; 4423 struct ieee80211_local *local = sdata->local; 4424 struct ieee80211_bss *bss = (void *)cbss->priv; 4425 u32 rates = 0, basic_rates = 0; 4426 bool have_higher_than_11mbit = false; 4427 int min_rate = INT_MAX, min_rate_index = -1; 4428 struct ieee80211_supported_band *sband; 4429 4430 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4431 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4432 4433 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4434 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4435 ieee80211_s1g_sta_rate_init(sta); 4436 return 0; 4437 } 4438 4439 sband = local->hw.wiphy->bands[cbss->channel->band]; 4440 4441 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4442 &rates, &basic_rates, &have_higher_than_11mbit, 4443 &min_rate, &min_rate_index); 4444 4445 /* 4446 * This used to be a workaround for basic rates missing 4447 * in the association response frame. Now that we no 4448 * longer use the basic rates from there, it probably 4449 * doesn't happen any more, but keep the workaround so 4450 * in case some *other* APs are buggy in different ways 4451 * we can connect -- with a warning. 4452 * Allow this workaround only in case the AP provided at least 4453 * one rate. 4454 */ 4455 if (min_rate_index < 0) { 4456 link_info(link, "No legacy rates in association response\n"); 4457 return -EINVAL; 4458 } else if (!basic_rates) { 4459 link_info(link, "No basic rates, using min rate instead\n"); 4460 basic_rates = BIT(min_rate_index); 4461 } 4462 4463 if (rates) 4464 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4465 else 4466 link_info(link, "No rates found, keeping mandatory only\n"); 4467 4468 link->conf->basic_rates = basic_rates; 4469 4470 /* cf. IEEE 802.11 9.2.12 */ 4471 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4472 have_higher_than_11mbit; 4473 4474 return 0; 4475 } 4476 4477 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4478 struct cfg80211_bss *cbss) 4479 { 4480 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4481 const struct element *ht_cap_elem, *vht_cap_elem; 4482 const struct cfg80211_bss_ies *ies; 4483 const struct ieee80211_ht_cap *ht_cap; 4484 const struct ieee80211_vht_cap *vht_cap; 4485 const struct ieee80211_he_cap_elem *he_cap; 4486 const struct element *he_cap_elem; 4487 u16 mcs_80_map, mcs_160_map; 4488 int i, mcs_nss_size; 4489 bool support_160; 4490 u8 chains = 1; 4491 4492 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4493 return chains; 4494 4495 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4496 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4497 ht_cap = (void *)ht_cap_elem->data; 4498 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4499 /* 4500 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4501 * "Tx Unequal Modulation Supported" fields. 4502 */ 4503 } 4504 4505 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4506 return chains; 4507 4508 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4509 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4510 u8 nss; 4511 u16 tx_mcs_map; 4512 4513 vht_cap = (void *)vht_cap_elem->data; 4514 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4515 for (nss = 8; nss > 0; nss--) { 4516 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4517 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4518 break; 4519 } 4520 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4521 chains = max(chains, nss); 4522 } 4523 4524 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4525 return chains; 4526 4527 ies = rcu_dereference(cbss->ies); 4528 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4529 ies->data, ies->len); 4530 4531 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4532 return chains; 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 + mcs_nss_size + sizeof(*he_cap)) 4540 return chains; 4541 4542 /* mcs_nss is right after he_cap info */ 4543 he_mcs_nss_supp = (void *)(he_cap + 1); 4544 4545 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4546 4547 for (i = 7; i >= 0; i--) { 4548 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4549 4550 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4551 chains = max_t(u8, chains, i + 1); 4552 break; 4553 } 4554 } 4555 4556 support_160 = he_cap->phy_cap_info[0] & 4557 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4558 4559 if (!support_160) 4560 return chains; 4561 4562 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4563 for (i = 7; i >= 0; i--) { 4564 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4565 4566 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4567 chains = max_t(u8, chains, i + 1); 4568 break; 4569 } 4570 } 4571 4572 return chains; 4573 } 4574 4575 static bool 4576 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4577 const struct ieee80211_he_cap_elem *he_cap, 4578 const struct ieee80211_he_operation *he_op) 4579 { 4580 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4581 u16 mcs_80_map_tx, mcs_80_map_rx; 4582 u16 ap_min_req_set; 4583 int nss; 4584 4585 if (!he_cap) 4586 return false; 4587 4588 /* mcs_nss is right after he_cap info */ 4589 he_mcs_nss_supp = (void *)(he_cap + 1); 4590 4591 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4592 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4593 4594 /* P802.11-REVme/D0.3 4595 * 27.1.1 Introduction to the HE PHY 4596 * ... 4597 * An HE STA shall support the following features: 4598 * ... 4599 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4600 * supported channel widths for HE SU PPDUs 4601 */ 4602 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4603 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4604 sdata_info(sdata, 4605 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4606 mcs_80_map_tx, mcs_80_map_rx); 4607 return false; 4608 } 4609 4610 if (!he_op) 4611 return true; 4612 4613 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4614 4615 /* 4616 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4617 * zeroes, which is nonsense, and completely inconsistent with itself 4618 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4619 */ 4620 if (!ap_min_req_set) 4621 return true; 4622 4623 /* make sure the AP is consistent with itself 4624 * 4625 * P802.11-REVme/D0.3 4626 * 26.17.1 Basic HE BSS operation 4627 * 4628 * A STA that is operating in an HE BSS shall be able to receive and 4629 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4630 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4631 * MLME-START.request primitive and shall be able to receive at each of 4632 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4633 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4634 * primitive 4635 */ 4636 for (nss = 8; nss > 0; nss--) { 4637 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4638 u8 ap_rx_val; 4639 u8 ap_tx_val; 4640 4641 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4642 continue; 4643 4644 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4645 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4646 4647 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4648 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4649 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4650 sdata_info(sdata, 4651 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4652 nss, ap_rx_val, ap_rx_val, ap_op_val); 4653 return false; 4654 } 4655 } 4656 4657 return true; 4658 } 4659 4660 static bool 4661 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4662 struct ieee80211_supported_band *sband, 4663 const struct ieee80211_he_operation *he_op) 4664 { 4665 const struct ieee80211_sta_he_cap *sta_he_cap = 4666 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4667 u16 ap_min_req_set; 4668 int i; 4669 4670 if (!sta_he_cap || !he_op) 4671 return false; 4672 4673 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4674 4675 /* 4676 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4677 * zeroes, which is nonsense, and completely inconsistent with itself 4678 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4679 */ 4680 if (!ap_min_req_set) 4681 return true; 4682 4683 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4684 for (i = 0; i < 3; i++) { 4685 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4686 &sta_he_cap->he_mcs_nss_supp; 4687 u16 sta_mcs_map_rx = 4688 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4689 u16 sta_mcs_map_tx = 4690 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4691 u8 nss; 4692 bool verified = true; 4693 4694 /* 4695 * For each band there is a maximum of 8 spatial streams 4696 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4697 * of 2 bits per NSS (1-8), with the values defined in enum 4698 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4699 * capabilities aren't less than the AP's minimum requirements 4700 * for this HE BSS per SS. 4701 * It is enough to find one such band that meets the reqs. 4702 */ 4703 for (nss = 8; nss > 0; nss--) { 4704 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4705 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4706 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4707 4708 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4709 continue; 4710 4711 /* 4712 * Make sure the HE AP doesn't require MCSs that aren't 4713 * supported by the client as required by spec 4714 * 4715 * P802.11-REVme/D0.3 4716 * 26.17.1 Basic HE BSS operation 4717 * 4718 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4719 * a BSS, unless it supports (i.e., is able to both transmit and 4720 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4721 * HE-MCS and NSS set. 4722 */ 4723 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4724 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4725 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4726 verified = false; 4727 break; 4728 } 4729 } 4730 4731 if (verified) 4732 return true; 4733 } 4734 4735 /* If here, STA doesn't meet AP's HE min requirements */ 4736 return false; 4737 } 4738 4739 static u8 4740 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 4741 const struct ieee80211_sta_eht_cap *sta_eht_cap, 4742 unsigned int idx, int bw) 4743 { 4744 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 4745 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 4746 4747 /* handle us being a 20 MHz-only EHT STA - with four values 4748 * for MCS 0-7, 8-9, 10-11, 12-13. 4749 */ 4750 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 4751 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 4752 4753 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 4754 if (idx > 0) 4755 idx--; 4756 4757 switch (bw) { 4758 case 0: 4759 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 4760 case 1: 4761 if (!(he_phy_cap0 & 4762 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 4763 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 4764 return 0xff; /* pass check */ 4765 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 4766 case 2: 4767 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 4768 return 0xff; /* pass check */ 4769 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 4770 } 4771 4772 WARN_ON(1); 4773 return 0; 4774 } 4775 4776 static bool 4777 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 4778 struct ieee80211_supported_band *sband, 4779 const struct ieee80211_eht_operation *eht_op) 4780 { 4781 const struct ieee80211_sta_he_cap *sta_he_cap = 4782 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4783 const struct ieee80211_sta_eht_cap *sta_eht_cap = 4784 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4785 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 4786 unsigned int i; 4787 4788 if (!sta_he_cap || !sta_eht_cap || !eht_op) 4789 return false; 4790 4791 req = &eht_op->basic_mcs_nss; 4792 4793 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 4794 u8 req_rx_nss, req_tx_nss; 4795 unsigned int bw; 4796 4797 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4798 IEEE80211_EHT_MCS_NSS_RX); 4799 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4800 IEEE80211_EHT_MCS_NSS_TX); 4801 4802 for (bw = 0; bw < 3; bw++) { 4803 u8 have, have_rx_nss, have_tx_nss; 4804 4805 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 4806 sta_eht_cap, 4807 i, bw); 4808 have_rx_nss = u8_get_bits(have, 4809 IEEE80211_EHT_MCS_NSS_RX); 4810 have_tx_nss = u8_get_bits(have, 4811 IEEE80211_EHT_MCS_NSS_TX); 4812 4813 if (req_rx_nss > have_rx_nss || 4814 req_tx_nss > have_tx_nss) 4815 return false; 4816 } 4817 } 4818 4819 return true; 4820 } 4821 4822 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4823 struct ieee80211_link_data *link, 4824 struct cfg80211_bss *cbss, 4825 bool mlo, 4826 ieee80211_conn_flags_t *conn_flags) 4827 { 4828 struct ieee80211_local *local = sdata->local; 4829 const struct ieee80211_ht_cap *ht_cap = NULL; 4830 const struct ieee80211_ht_operation *ht_oper = NULL; 4831 const struct ieee80211_vht_operation *vht_oper = NULL; 4832 const struct ieee80211_he_operation *he_oper = NULL; 4833 const struct ieee80211_eht_operation *eht_oper = NULL; 4834 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4835 struct ieee80211_supported_band *sband; 4836 struct cfg80211_chan_def chandef; 4837 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4838 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4839 bool supports_mlo = false; 4840 struct ieee80211_bss *bss = (void *)cbss->priv; 4841 struct ieee80211_elems_parse_params parse_params = { 4842 .link_id = -1, 4843 .from_ap = true, 4844 }; 4845 struct ieee802_11_elems *elems; 4846 const struct cfg80211_bss_ies *ies; 4847 int ret; 4848 u32 i; 4849 bool have_80mhz; 4850 4851 lockdep_assert_wiphy(local->hw.wiphy); 4852 4853 rcu_read_lock(); 4854 4855 ies = rcu_dereference(cbss->ies); 4856 parse_params.start = ies->data; 4857 parse_params.len = ies->len; 4858 elems = ieee802_11_parse_elems_full(&parse_params); 4859 if (!elems) { 4860 rcu_read_unlock(); 4861 return -ENOMEM; 4862 } 4863 4864 sband = local->hw.wiphy->bands[cbss->channel->band]; 4865 4866 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4867 IEEE80211_CONN_DISABLE_80P80MHZ | 4868 IEEE80211_CONN_DISABLE_160MHZ); 4869 4870 /* disable HT/VHT/HE if we don't support them */ 4871 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4872 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4873 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4874 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4875 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4876 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4877 } 4878 4879 if (!sband->vht_cap.vht_supported && is_5ghz) { 4880 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4881 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4882 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4883 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4884 } 4885 4886 if (!ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 4887 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4888 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4889 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4890 } 4891 4892 if (!ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) { 4893 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4894 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4895 } 4896 4897 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4898 ht_oper = elems->ht_operation; 4899 ht_cap = elems->ht_cap_elem; 4900 4901 if (!ht_cap) { 4902 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4903 ht_oper = NULL; 4904 } 4905 } 4906 4907 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4908 vht_oper = elems->vht_operation; 4909 if (vht_oper && !ht_oper) { 4910 vht_oper = NULL; 4911 sdata_info(sdata, 4912 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4913 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4914 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4915 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4916 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4917 } 4918 4919 if (!elems->vht_cap_elem) { 4920 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4921 vht_oper = NULL; 4922 } 4923 } 4924 4925 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4926 he_oper = elems->he_operation; 4927 4928 if (link && is_6ghz) { 4929 struct ieee80211_bss_conf *bss_conf; 4930 u8 j = 0; 4931 4932 bss_conf = link->conf; 4933 4934 if (elems->pwr_constr_elem) 4935 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4936 4937 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4938 ARRAY_SIZE(elems->tx_pwr_env)); 4939 4940 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4941 if (elems->tx_pwr_env_len[i] > 4942 sizeof(bss_conf->tx_pwr_env[j])) 4943 continue; 4944 4945 bss_conf->tx_pwr_env_num++; 4946 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4947 elems->tx_pwr_env_len[i]); 4948 j++; 4949 } 4950 } 4951 4952 if (!ieee80211_verify_peer_he_mcs_support(sdata, 4953 (void *)elems->he_cap, 4954 he_oper) || 4955 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4956 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4957 IEEE80211_CONN_DISABLE_EHT; 4958 } 4959 4960 /* 4961 * EHT requires HE to be supported as well. Specifically for 6 GHz 4962 * channels, the operation channel information can only be deduced from 4963 * both the 6 GHz operation information (from the HE operation IE) and 4964 * EHT operation. 4965 */ 4966 if (!(*conn_flags & 4967 (IEEE80211_CONN_DISABLE_HE | 4968 IEEE80211_CONN_DISABLE_EHT)) && 4969 he_oper) { 4970 eht_oper = elems->eht_operation; 4971 4972 if (!ieee80211_verify_sta_eht_mcs_support(sdata, sband, eht_oper)) 4973 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4974 4975 supports_mlo = elems->ml_basic; 4976 } 4977 4978 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4979 have_80mhz = false; 4980 for (i = 0; i < sband->n_channels; i++) { 4981 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4982 IEEE80211_CHAN_NO_80MHZ)) 4983 continue; 4984 4985 have_80mhz = true; 4986 break; 4987 } 4988 4989 if (!have_80mhz) { 4990 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4991 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4992 } 4993 4994 if (sband->band == NL80211_BAND_S1GHZ) { 4995 s1g_oper = elems->s1g_oper; 4996 if (!s1g_oper) 4997 sdata_info(sdata, 4998 "AP missing S1G operation element?\n"); 4999 } 5000 5001 *conn_flags |= 5002 ieee80211_determine_chantype(sdata, link, *conn_flags, 5003 sband, 5004 cbss->channel, 5005 bss->vht_cap_info, 5006 ht_oper, vht_oper, 5007 he_oper, eht_oper, 5008 s1g_oper, 5009 &chandef, false); 5010 5011 if (link) 5012 link->needed_rx_chains = 5013 min(ieee80211_max_rx_chains(link, cbss), 5014 local->rx_chains); 5015 5016 rcu_read_unlock(); 5017 /* the element data was RCU protected so no longer valid anyway */ 5018 kfree(elems); 5019 elems = NULL; 5020 5021 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 5022 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5023 return -EINVAL; 5024 } 5025 5026 if (mlo && !supports_mlo) { 5027 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5028 return -EINVAL; 5029 } 5030 5031 if (!link) 5032 return 0; 5033 5034 /* will change later if needed */ 5035 link->smps_mode = IEEE80211_SMPS_OFF; 5036 5037 /* 5038 * If this fails (possibly due to channel context sharing 5039 * on incompatible channels, e.g. 80+80 and 160 sharing the 5040 * same control channel) try to use a smaller bandwidth. 5041 */ 5042 ret = ieee80211_link_use_channel(link, &chandef, 5043 IEEE80211_CHANCTX_SHARED); 5044 5045 /* don't downgrade for 5 and 10 MHz channels, though. */ 5046 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5047 chandef.width == NL80211_CHAN_WIDTH_10) 5048 goto out; 5049 5050 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5051 *conn_flags |= 5052 ieee80211_chandef_downgrade(&chandef); 5053 ret = ieee80211_link_use_channel(link, &chandef, 5054 IEEE80211_CHANCTX_SHARED); 5055 } 5056 out: 5057 return ret; 5058 } 5059 5060 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5061 u8 *dtim_count, u8 *dtim_period) 5062 { 5063 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5064 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5065 ies->len); 5066 const struct ieee80211_tim_ie *tim = NULL; 5067 const struct ieee80211_bssid_index *idx; 5068 bool valid = tim_ie && tim_ie[1] >= 2; 5069 5070 if (valid) 5071 tim = (void *)(tim_ie + 2); 5072 5073 if (dtim_count) 5074 *dtim_count = valid ? tim->dtim_count : 0; 5075 5076 if (dtim_period) 5077 *dtim_period = valid ? tim->dtim_period : 0; 5078 5079 /* Check if value is overridden by non-transmitted profile */ 5080 if (!idx_ie || idx_ie[1] < 3) 5081 return valid; 5082 5083 idx = (void *)(idx_ie + 2); 5084 5085 if (dtim_count) 5086 *dtim_count = idx->dtim_count; 5087 5088 if (dtim_period) 5089 *dtim_period = idx->dtim_period; 5090 5091 return true; 5092 } 5093 5094 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5095 struct ieee80211_mgmt *mgmt, 5096 struct ieee802_11_elems *elems, 5097 const u8 *elem_start, unsigned int elem_len) 5098 { 5099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5100 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5101 struct ieee80211_local *local = sdata->local; 5102 unsigned int link_id; 5103 struct sta_info *sta; 5104 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5105 u16 valid_links = 0, dormant_links = 0; 5106 int err; 5107 5108 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5109 /* 5110 * station info was already allocated and inserted before 5111 * the association and should be available to us 5112 */ 5113 sta = sta_info_get(sdata, assoc_data->ap_addr); 5114 if (WARN_ON(!sta)) 5115 goto out_err; 5116 5117 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5118 5119 if (ieee80211_vif_is_mld(&sdata->vif)) { 5120 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5121 if (!assoc_data->link[link_id].bss) 5122 continue; 5123 5124 valid_links |= BIT(link_id); 5125 if (assoc_data->link[link_id].disabled) 5126 dormant_links |= BIT(link_id); 5127 5128 if (link_id != assoc_data->assoc_link_id) { 5129 err = ieee80211_sta_allocate_link(sta, link_id); 5130 if (err) 5131 goto out_err; 5132 } 5133 } 5134 5135 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5136 } 5137 5138 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5139 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5140 struct ieee80211_link_data *link; 5141 struct link_sta_info *link_sta; 5142 5143 if (!cbss) 5144 continue; 5145 5146 link = sdata_dereference(sdata->link[link_id], sdata); 5147 if (WARN_ON(!link)) 5148 goto out_err; 5149 5150 if (ieee80211_vif_is_mld(&sdata->vif)) 5151 link_info(link, 5152 "local address %pM, AP link address %pM%s\n", 5153 link->conf->addr, 5154 assoc_data->link[link_id].bss->bssid, 5155 link_id == assoc_data->assoc_link_id ? 5156 " (assoc)" : ""); 5157 5158 link_sta = rcu_dereference_protected(sta->link[link_id], 5159 lockdep_is_held(&local->hw.wiphy->mtx)); 5160 if (WARN_ON(!link_sta)) 5161 goto out_err; 5162 5163 if (!link->u.mgd.have_beacon) { 5164 const struct cfg80211_bss_ies *ies; 5165 5166 rcu_read_lock(); 5167 ies = rcu_dereference(cbss->beacon_ies); 5168 if (ies) 5169 link->u.mgd.have_beacon = true; 5170 else 5171 ies = rcu_dereference(cbss->ies); 5172 ieee80211_get_dtim(ies, 5173 &link->conf->sync_dtim_count, 5174 &link->u.mgd.dtim_period); 5175 link->conf->beacon_int = cbss->beacon_interval; 5176 rcu_read_unlock(); 5177 } 5178 5179 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5180 5181 if (link_id != assoc_data->assoc_link_id) { 5182 err = ieee80211_prep_channel(sdata, link, cbss, true, 5183 &link->u.mgd.conn_flags); 5184 if (err) { 5185 link_info(link, "prep_channel failed\n"); 5186 goto out_err; 5187 } 5188 } 5189 5190 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5191 assoc_data->link[link_id].bss); 5192 if (err) 5193 goto out_err; 5194 5195 if (!ieee80211_assoc_config_link(link, link_sta, 5196 assoc_data->link[link_id].bss, 5197 mgmt, elem_start, elem_len, 5198 &changed[link_id])) 5199 goto out_err; 5200 5201 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5202 valid_links &= ~BIT(link_id); 5203 ieee80211_sta_remove_link(sta, link_id); 5204 continue; 5205 } 5206 5207 if (link_id != assoc_data->assoc_link_id) { 5208 err = ieee80211_sta_activate_link(sta, link_id); 5209 if (err) 5210 goto out_err; 5211 } 5212 } 5213 5214 /* links might have changed due to rejected ones, set them again */ 5215 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5216 5217 rate_control_rate_init(sta); 5218 5219 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5220 set_sta_flag(sta, WLAN_STA_MFP); 5221 sta->sta.mfp = true; 5222 } else { 5223 sta->sta.mfp = false; 5224 } 5225 5226 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5227 elems->ext_capab_len); 5228 5229 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5230 local->hw.queues >= IEEE80211_NUM_ACS; 5231 5232 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5233 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5234 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5235 if (err) { 5236 sdata_info(sdata, 5237 "failed to move station %pM to desired state\n", 5238 sta->sta.addr); 5239 WARN_ON(__sta_info_destroy(sta)); 5240 goto out_err; 5241 } 5242 5243 if (sdata->wdev.use_4addr) 5244 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5245 5246 ieee80211_set_associated(sdata, assoc_data, changed); 5247 5248 /* 5249 * If we're using 4-addr mode, let the AP know that we're 5250 * doing so, so that it can create the STA VLAN on its side 5251 */ 5252 if (ifmgd->use_4addr) 5253 ieee80211_send_4addr_nullfunc(local, sdata); 5254 5255 /* 5256 * Start timer to probe the connection to the AP now. 5257 * Also start the timer that will detect beacon loss. 5258 */ 5259 ieee80211_sta_reset_beacon_monitor(sdata); 5260 ieee80211_sta_reset_conn_monitor(sdata); 5261 5262 return true; 5263 out_err: 5264 eth_zero_addr(sdata->vif.cfg.ap_addr); 5265 return false; 5266 } 5267 5268 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5269 struct ieee80211_mgmt *mgmt, 5270 size_t len) 5271 { 5272 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5273 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5274 u16 capab_info, status_code, aid; 5275 struct ieee80211_elems_parse_params parse_params = { 5276 .bss = NULL, 5277 .link_id = -1, 5278 .from_ap = true, 5279 }; 5280 struct ieee802_11_elems *elems; 5281 int ac; 5282 const u8 *elem_start; 5283 unsigned int elem_len; 5284 bool reassoc; 5285 struct ieee80211_event event = { 5286 .type = MLME_EVENT, 5287 .u.mlme.data = ASSOC_EVENT, 5288 }; 5289 struct ieee80211_prep_tx_info info = {}; 5290 struct cfg80211_rx_assoc_resp_data resp = { 5291 .uapsd_queues = -1, 5292 }; 5293 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5294 unsigned int link_id; 5295 5296 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5297 5298 if (!assoc_data) 5299 return; 5300 5301 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5302 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5303 return; 5304 5305 /* 5306 * AssocResp and ReassocResp have identical structure, so process both 5307 * of them in this function. 5308 */ 5309 5310 if (len < 24 + 6) 5311 return; 5312 5313 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5314 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5315 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5316 if (assoc_data->s1g) 5317 elem_start = mgmt->u.s1g_assoc_resp.variable; 5318 else 5319 elem_start = mgmt->u.assoc_resp.variable; 5320 5321 /* 5322 * Note: this may not be perfect, AP might misbehave - if 5323 * anyone needs to rely on perfect complete notification 5324 * with the exact right subtype, then we need to track what 5325 * we actually transmitted. 5326 */ 5327 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5328 IEEE80211_STYPE_ASSOC_REQ; 5329 5330 if (assoc_data->fils_kek_len && 5331 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5332 return; 5333 5334 elem_len = len - (elem_start - (u8 *)mgmt); 5335 parse_params.start = elem_start; 5336 parse_params.len = elem_len; 5337 elems = ieee802_11_parse_elems_full(&parse_params); 5338 if (!elems) 5339 goto notify_driver; 5340 5341 if (elems->aid_resp) 5342 aid = le16_to_cpu(elems->aid_resp->aid); 5343 else if (assoc_data->s1g) 5344 aid = 0; /* TODO */ 5345 else 5346 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5347 5348 /* 5349 * The 5 MSB of the AID field are reserved 5350 * (802.11-2016 9.4.1.8 AID field) 5351 */ 5352 aid &= 0x7ff; 5353 5354 sdata_info(sdata, 5355 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5356 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5357 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5358 5359 ifmgd->broken_ap = false; 5360 5361 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5362 elems->timeout_int && 5363 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5364 u32 tu, ms; 5365 5366 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5367 le32_to_cpu(elems->timeout_int->value)); 5368 5369 tu = le32_to_cpu(elems->timeout_int->value); 5370 ms = tu * 1024 / 1000; 5371 sdata_info(sdata, 5372 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5373 assoc_data->ap_addr, tu, ms); 5374 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5375 assoc_data->timeout_started = true; 5376 assoc_data->comeback = true; 5377 if (ms > IEEE80211_ASSOC_TIMEOUT) 5378 run_again(sdata, assoc_data->timeout); 5379 goto notify_driver; 5380 } 5381 5382 if (status_code != WLAN_STATUS_SUCCESS) { 5383 sdata_info(sdata, "%pM denied association (code=%d)\n", 5384 assoc_data->ap_addr, status_code); 5385 event.u.mlme.status = MLME_DENIED; 5386 event.u.mlme.reason = status_code; 5387 drv_event_callback(sdata->local, sdata, &event); 5388 } else { 5389 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5390 sdata_info(sdata, 5391 "invalid AID value %d (out of range), turn off PS\n", 5392 aid); 5393 aid = 0; 5394 ifmgd->broken_ap = true; 5395 } 5396 5397 if (ieee80211_vif_is_mld(&sdata->vif)) { 5398 struct ieee80211_mle_basic_common_info *common; 5399 5400 if (!elems->ml_basic) { 5401 sdata_info(sdata, 5402 "MLO association with %pM but no (basic) multi-link element in response!\n", 5403 assoc_data->ap_addr); 5404 goto abandon_assoc; 5405 } 5406 5407 common = (void *)elems->ml_basic->variable; 5408 5409 if (memcmp(assoc_data->ap_addr, 5410 common->mld_mac_addr, ETH_ALEN)) { 5411 sdata_info(sdata, 5412 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5413 common->mld_mac_addr, 5414 assoc_data->ap_addr); 5415 goto abandon_assoc; 5416 } 5417 5418 sdata->vif.cfg.eml_cap = 5419 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5420 sdata->vif.cfg.eml_med_sync_delay = 5421 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5422 sdata->vif.cfg.mld_capa_op = 5423 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5424 } 5425 5426 sdata->vif.cfg.aid = aid; 5427 5428 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5429 elem_start, elem_len)) { 5430 /* oops -- internal error -- send timeout for now */ 5431 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5432 goto notify_driver; 5433 } 5434 event.u.mlme.status = MLME_SUCCESS; 5435 drv_event_callback(sdata->local, sdata, &event); 5436 sdata_info(sdata, "associated\n"); 5437 5438 info.success = 1; 5439 } 5440 5441 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5442 struct ieee80211_link_data *link; 5443 5444 if (!assoc_data->link[link_id].bss) 5445 continue; 5446 5447 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5448 ether_addr_copy(resp.links[link_id].addr, 5449 assoc_data->link[link_id].addr); 5450 resp.links[link_id].status = assoc_data->link[link_id].status; 5451 5452 link = sdata_dereference(sdata->link[link_id], sdata); 5453 if (!link) 5454 continue; 5455 5456 /* get uapsd queues configuration - same for all links */ 5457 resp.uapsd_queues = 0; 5458 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5459 if (link->tx_conf[ac].uapsd) 5460 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5461 } 5462 5463 if (ieee80211_vif_is_mld(&sdata->vif)) { 5464 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5465 resp.ap_mld_addr = ap_mld_addr; 5466 } 5467 5468 ieee80211_destroy_assoc_data(sdata, 5469 status_code == WLAN_STATUS_SUCCESS ? 5470 ASSOC_SUCCESS : 5471 ASSOC_REJECTED); 5472 5473 resp.buf = (u8 *)mgmt; 5474 resp.len = len; 5475 resp.req_ies = ifmgd->assoc_req_ies; 5476 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5477 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5478 notify_driver: 5479 drv_mgd_complete_tx(sdata->local, sdata, &info); 5480 kfree(elems); 5481 return; 5482 abandon_assoc: 5483 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5484 goto notify_driver; 5485 } 5486 5487 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5488 struct ieee80211_mgmt *mgmt, size_t len, 5489 struct ieee80211_rx_status *rx_status) 5490 { 5491 struct ieee80211_sub_if_data *sdata = link->sdata; 5492 struct ieee80211_local *local = sdata->local; 5493 struct ieee80211_bss *bss; 5494 struct ieee80211_channel *channel; 5495 5496 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5497 5498 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5499 ieee80211_rx_status_to_khz(rx_status)); 5500 if (!channel) 5501 return; 5502 5503 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5504 if (bss) { 5505 link->conf->beacon_rate = bss->beacon_rate; 5506 ieee80211_rx_bss_put(local, bss); 5507 } 5508 } 5509 5510 5511 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5512 struct sk_buff *skb) 5513 { 5514 struct ieee80211_sub_if_data *sdata = link->sdata; 5515 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5516 struct ieee80211_if_managed *ifmgd; 5517 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5518 struct ieee80211_channel *channel; 5519 size_t baselen, len = skb->len; 5520 5521 ifmgd = &sdata->u.mgd; 5522 5523 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5524 5525 /* 5526 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5527 * "If a 6 GHz AP receives a Probe Request frame and responds with 5528 * a Probe Response frame [..], the Address 1 field of the Probe 5529 * Response frame shall be set to the broadcast address [..]" 5530 * So, on 6GHz band we should also accept broadcast responses. 5531 */ 5532 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5533 rx_status->freq); 5534 if (!channel) 5535 return; 5536 5537 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5538 (channel->band != NL80211_BAND_6GHZ || 5539 !is_broadcast_ether_addr(mgmt->da))) 5540 return; /* ignore ProbeResp to foreign address */ 5541 5542 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5543 if (baselen > len) 5544 return; 5545 5546 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5547 5548 if (ifmgd->associated && 5549 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5550 ieee80211_reset_ap_probe(sdata); 5551 } 5552 5553 /* 5554 * This is the canonical list of information elements we care about, 5555 * the filter code also gives us all changes to the Microsoft OUI 5556 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5557 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5558 * changes to requested client power. 5559 * 5560 * We implement beacon filtering in software since that means we can 5561 * avoid processing the frame here and in cfg80211, and userspace 5562 * will not be able to tell whether the hardware supports it or not. 5563 * 5564 * XXX: This list needs to be dynamic -- userspace needs to be able to 5565 * add items it requires. It also needs to be able to tell us to 5566 * look out for other vendor IEs. 5567 */ 5568 static const u64 care_about_ies = 5569 (1ULL << WLAN_EID_COUNTRY) | 5570 (1ULL << WLAN_EID_ERP_INFO) | 5571 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5572 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5573 (1ULL << WLAN_EID_HT_CAPABILITY) | 5574 (1ULL << WLAN_EID_HT_OPERATION) | 5575 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5576 5577 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5578 struct ieee80211_if_managed *ifmgd, 5579 struct ieee80211_bss_conf *bss_conf, 5580 struct ieee80211_local *local, 5581 struct ieee80211_rx_status *rx_status) 5582 { 5583 struct ieee80211_sub_if_data *sdata = link->sdata; 5584 5585 /* Track average RSSI from the Beacon frames of the current AP */ 5586 5587 if (!link->u.mgd.tracking_signal_avg) { 5588 link->u.mgd.tracking_signal_avg = true; 5589 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5590 link->u.mgd.last_cqm_event_signal = 0; 5591 link->u.mgd.count_beacon_signal = 1; 5592 link->u.mgd.last_ave_beacon_signal = 0; 5593 } else { 5594 link->u.mgd.count_beacon_signal++; 5595 } 5596 5597 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5598 -rx_status->signal); 5599 5600 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5601 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5602 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5603 int last_sig = link->u.mgd.last_ave_beacon_signal; 5604 struct ieee80211_event event = { 5605 .type = RSSI_EVENT, 5606 }; 5607 5608 /* 5609 * if signal crosses either of the boundaries, invoke callback 5610 * with appropriate parameters 5611 */ 5612 if (sig > ifmgd->rssi_max_thold && 5613 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5614 link->u.mgd.last_ave_beacon_signal = sig; 5615 event.u.rssi.data = RSSI_EVENT_HIGH; 5616 drv_event_callback(local, sdata, &event); 5617 } else if (sig < ifmgd->rssi_min_thold && 5618 (last_sig >= ifmgd->rssi_max_thold || 5619 last_sig == 0)) { 5620 link->u.mgd.last_ave_beacon_signal = sig; 5621 event.u.rssi.data = RSSI_EVENT_LOW; 5622 drv_event_callback(local, sdata, &event); 5623 } 5624 } 5625 5626 if (bss_conf->cqm_rssi_thold && 5627 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5628 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5629 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5630 int last_event = link->u.mgd.last_cqm_event_signal; 5631 int thold = bss_conf->cqm_rssi_thold; 5632 int hyst = bss_conf->cqm_rssi_hyst; 5633 5634 if (sig < thold && 5635 (last_event == 0 || sig < last_event - hyst)) { 5636 link->u.mgd.last_cqm_event_signal = sig; 5637 ieee80211_cqm_rssi_notify( 5638 &sdata->vif, 5639 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5640 sig, GFP_KERNEL); 5641 } else if (sig > thold && 5642 (last_event == 0 || sig > last_event + hyst)) { 5643 link->u.mgd.last_cqm_event_signal = sig; 5644 ieee80211_cqm_rssi_notify( 5645 &sdata->vif, 5646 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5647 sig, GFP_KERNEL); 5648 } 5649 } 5650 5651 if (bss_conf->cqm_rssi_low && 5652 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5653 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5654 int last_event = link->u.mgd.last_cqm_event_signal; 5655 int low = bss_conf->cqm_rssi_low; 5656 int high = bss_conf->cqm_rssi_high; 5657 5658 if (sig < low && 5659 (last_event == 0 || last_event >= low)) { 5660 link->u.mgd.last_cqm_event_signal = sig; 5661 ieee80211_cqm_rssi_notify( 5662 &sdata->vif, 5663 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5664 sig, GFP_KERNEL); 5665 } else if (sig > high && 5666 (last_event == 0 || last_event <= high)) { 5667 link->u.mgd.last_cqm_event_signal = sig; 5668 ieee80211_cqm_rssi_notify( 5669 &sdata->vif, 5670 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5671 sig, GFP_KERNEL); 5672 } 5673 } 5674 } 5675 5676 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5677 struct cfg80211_bss *bss) 5678 { 5679 if (ether_addr_equal(tx_bssid, bss->bssid)) 5680 return true; 5681 if (!bss->transmitted_bss) 5682 return false; 5683 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5684 } 5685 5686 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5687 const struct ieee80211_eht_operation *eht_oper, 5688 u64 *changed) 5689 { 5690 struct ieee80211_local *local = link->sdata->local; 5691 u16 bitmap = 0, extracted; 5692 5693 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5694 (eht_oper->params & 5695 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5696 const struct ieee80211_eht_operation_info *info = 5697 (void *)eht_oper->optional; 5698 const u8 *disable_subchannel_bitmap = info->optional; 5699 5700 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5701 } 5702 5703 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5704 &link->conf->chandef, 5705 bitmap); 5706 5707 /* accept if there are no changes */ 5708 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5709 extracted == link->conf->eht_puncturing) 5710 return true; 5711 5712 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5713 &link->conf->chandef)) { 5714 link_info(link, 5715 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5716 link->u.mgd.bssid, 5717 bitmap, 5718 link->conf->chandef.width); 5719 return false; 5720 } 5721 5722 if (bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING)) 5723 return false; 5724 5725 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5726 return true; 5727 } 5728 5729 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5730 struct wiphy_work *work) 5731 { 5732 struct ieee80211_sub_if_data *sdata = 5733 container_of(work, struct ieee80211_sub_if_data, 5734 u.mgd.ml_reconf_work.work); 5735 u16 new_valid_links, new_active_links, new_dormant_links; 5736 int ret; 5737 5738 if (!sdata->u.mgd.removed_links) 5739 return; 5740 5741 sdata_info(sdata, 5742 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5743 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5744 5745 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5746 if (new_valid_links == sdata->vif.valid_links) 5747 return; 5748 5749 if (!new_valid_links || 5750 !(new_valid_links & ~sdata->vif.dormant_links)) { 5751 sdata_info(sdata, "No valid links after reconfiguration\n"); 5752 ret = -EINVAL; 5753 goto out; 5754 } 5755 5756 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5757 if (new_active_links != sdata->vif.active_links) { 5758 if (!new_active_links) 5759 new_active_links = 5760 BIT(ffs(new_valid_links & 5761 ~sdata->vif.dormant_links) - 1); 5762 5763 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 5764 if (ret) { 5765 sdata_info(sdata, 5766 "Failed setting active links\n"); 5767 goto out; 5768 } 5769 } 5770 5771 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 5772 5773 ret = ieee80211_vif_set_links(sdata, new_valid_links, 5774 new_dormant_links); 5775 if (ret) 5776 sdata_info(sdata, "Failed setting valid links\n"); 5777 5778 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 5779 5780 out: 5781 if (!ret) 5782 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5783 else 5784 __ieee80211_disconnect(sdata); 5785 5786 sdata->u.mgd.removed_links = 0; 5787 } 5788 5789 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5790 struct ieee802_11_elems *elems) 5791 { 5792 const struct ieee80211_multi_link_elem *ml; 5793 const struct element *sub; 5794 ssize_t ml_len; 5795 unsigned long removed_links = 0; 5796 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5797 u8 link_id; 5798 u32 delay; 5799 5800 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5801 return; 5802 5803 ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, 5804 elems->ie_start, 5805 elems->total_len, 5806 elems->scratch_pos, 5807 elems->scratch + elems->scratch_len - 5808 elems->scratch_pos, 5809 WLAN_EID_FRAGMENT); 5810 if (ml_len < 0) 5811 return; 5812 5813 elems->ml_reconf = (const void *)elems->scratch_pos; 5814 elems->ml_reconf_len = ml_len; 5815 ml = elems->ml_reconf; 5816 5817 /* Directly parse the sub elements as the common information doesn't 5818 * hold any useful information. 5819 */ 5820 for_each_mle_subelement(sub, (u8 *)ml, ml_len) { 5821 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 5822 u8 *pos = prof->variable; 5823 u16 control; 5824 5825 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 5826 continue; 5827 5828 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 5829 sub->datalen)) 5830 return; 5831 5832 control = le16_to_cpu(prof->control); 5833 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 5834 5835 removed_links |= BIT(link_id); 5836 5837 /* the MAC address should not be included, but handle it */ 5838 if (control & 5839 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 5840 pos += 6; 5841 5842 /* According to Draft P802.11be_D3.0, the control should 5843 * include the AP Removal Timer present. If the AP Removal Timer 5844 * is not present assume immediate removal. 5845 */ 5846 if (control & 5847 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 5848 link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos); 5849 } 5850 5851 removed_links &= sdata->vif.valid_links; 5852 if (!removed_links) { 5853 /* In case the removal was cancelled, abort it */ 5854 if (sdata->u.mgd.removed_links) { 5855 sdata->u.mgd.removed_links = 0; 5856 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5857 &sdata->u.mgd.ml_reconf_work); 5858 } 5859 return; 5860 } 5861 5862 delay = 0; 5863 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 5864 struct ieee80211_bss_conf *link_conf = 5865 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 5866 u32 link_delay; 5867 5868 if (!link_conf) { 5869 removed_links &= ~BIT(link_id); 5870 continue; 5871 } 5872 5873 link_delay = link_conf->beacon_int * 5874 link_removal_timeout[link_id]; 5875 5876 if (!delay) 5877 delay = link_delay; 5878 else 5879 delay = min(delay, link_delay); 5880 } 5881 5882 sdata->u.mgd.removed_links = removed_links; 5883 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 5884 &sdata->u.mgd.ml_reconf_work, 5885 TU_TO_JIFFIES(delay)); 5886 } 5887 5888 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 5889 u16 active_links, u16 dormant_links, 5890 u16 suspended_links) 5891 { 5892 u64 changed = 0; 5893 int ret; 5894 5895 if (!active_links) { 5896 ret = -EINVAL; 5897 goto out; 5898 } 5899 5900 /* If there is an active negotiated TTLM, it should be discarded by 5901 * the new negotiated/advertised TTLM. 5902 */ 5903 if (sdata->vif.neg_ttlm.valid) { 5904 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 5905 sdata->vif.suspended_links = 0; 5906 changed = BSS_CHANGED_MLD_TTLM; 5907 } 5908 5909 if (sdata->vif.active_links != active_links) { 5910 ret = ieee80211_set_active_links(&sdata->vif, active_links); 5911 if (ret) { 5912 sdata_info(sdata, "Failed to set TTLM active links\n"); 5913 goto out; 5914 } 5915 } 5916 5917 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 5918 dormant_links); 5919 if (ret) { 5920 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 5921 goto out; 5922 } 5923 5924 changed |= BSS_CHANGED_MLD_VALID_LINKS; 5925 sdata->vif.suspended_links = suspended_links; 5926 if (sdata->vif.suspended_links) 5927 changed |= BSS_CHANGED_MLD_TTLM; 5928 5929 ieee80211_vif_cfg_change_notify(sdata, changed); 5930 5931 out: 5932 if (ret) 5933 ieee80211_disconnect(&sdata->vif, false); 5934 5935 return ret; 5936 } 5937 5938 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 5939 struct wiphy_work *work) 5940 { 5941 u16 new_active_links, new_dormant_links; 5942 struct ieee80211_sub_if_data *sdata = 5943 container_of(work, struct ieee80211_sub_if_data, 5944 u.mgd.ttlm_work.work); 5945 5946 new_active_links = sdata->u.mgd.ttlm_info.map & 5947 sdata->vif.valid_links; 5948 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 5949 sdata->vif.valid_links; 5950 5951 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 5952 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 5953 0)) 5954 return; 5955 5956 sdata->u.mgd.ttlm_info.active = true; 5957 sdata->u.mgd.ttlm_info.switch_time = 0; 5958 } 5959 5960 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 5961 { 5962 if (bm_size == 1) 5963 return *data; 5964 else 5965 return get_unaligned_le16(data); 5966 } 5967 5968 static int 5969 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 5970 const struct ieee80211_ttlm_elem *ttlm, 5971 struct ieee80211_adv_ttlm_info *ttlm_info) 5972 { 5973 /* The element size was already validated in 5974 * ieee80211_tid_to_link_map_size_ok() 5975 */ 5976 u8 control, link_map_presence, map_size, tid; 5977 u8 *pos; 5978 5979 memset(ttlm_info, 0, sizeof(*ttlm_info)); 5980 pos = (void *)ttlm->optional; 5981 control = ttlm->control; 5982 5983 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 5984 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 5985 return 0; 5986 5987 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 5988 IEEE80211_TTLM_DIRECTION_BOTH) { 5989 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 5990 return -EINVAL; 5991 } 5992 5993 link_map_presence = *pos; 5994 pos++; 5995 5996 ttlm_info->switch_time = get_unaligned_le16(pos); 5997 5998 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 5999 * by 1. 6000 */ 6001 if (!ttlm_info->switch_time) 6002 ttlm_info->switch_time = 1; 6003 6004 pos += 2; 6005 6006 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6007 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6008 pos += 3; 6009 } 6010 6011 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6012 map_size = 1; 6013 else 6014 map_size = 2; 6015 6016 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6017 * not advertise a TID-to-link mapping that does not map all TIDs to the 6018 * same link set, reject frame if not all links have mapping 6019 */ 6020 if (link_map_presence != 0xff) { 6021 sdata_info(sdata, 6022 "Invalid advertised T2L mapping presence indicator\n"); 6023 return -EINVAL; 6024 } 6025 6026 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6027 if (!ttlm_info->map) { 6028 sdata_info(sdata, 6029 "Invalid advertised T2L map for TID 0\n"); 6030 return -EINVAL; 6031 } 6032 6033 pos += map_size; 6034 6035 for (tid = 1; tid < 8; tid++) { 6036 u16 map = ieee80211_get_ttlm(map_size, pos); 6037 6038 if (map != ttlm_info->map) { 6039 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6040 tid); 6041 return -EINVAL; 6042 } 6043 6044 pos += map_size; 6045 } 6046 return 0; 6047 } 6048 6049 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6050 struct ieee802_11_elems *elems, 6051 u64 beacon_ts) 6052 { 6053 u8 i; 6054 int ret; 6055 6056 if (!ieee80211_vif_is_mld(&sdata->vif)) 6057 return; 6058 6059 if (!elems->ttlm_num) { 6060 if (sdata->u.mgd.ttlm_info.switch_time) { 6061 /* if a planned TID-to-link mapping was cancelled - 6062 * abort it 6063 */ 6064 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6065 &sdata->u.mgd.ttlm_work); 6066 } else if (sdata->u.mgd.ttlm_info.active) { 6067 /* if no TID-to-link element, set to default mapping in 6068 * which all TIDs are mapped to all setup links 6069 */ 6070 ret = ieee80211_vif_set_links(sdata, 6071 sdata->vif.valid_links, 6072 0); 6073 if (ret) { 6074 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6075 return; 6076 } 6077 ieee80211_vif_cfg_change_notify(sdata, 6078 BSS_CHANGED_MLD_VALID_LINKS); 6079 } 6080 memset(&sdata->u.mgd.ttlm_info, 0, 6081 sizeof(sdata->u.mgd.ttlm_info)); 6082 return; 6083 } 6084 6085 for (i = 0; i < elems->ttlm_num; i++) { 6086 struct ieee80211_adv_ttlm_info ttlm_info; 6087 u32 res; 6088 6089 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6090 &ttlm_info); 6091 6092 if (res) { 6093 __ieee80211_disconnect(sdata); 6094 return; 6095 } 6096 6097 if (ttlm_info.switch_time) { 6098 u16 beacon_ts_tu, st_tu, delay; 6099 u32 delay_jiffies; 6100 u64 mask; 6101 6102 /* The t2l map switch time is indicated with a partial 6103 * TSF value (bits 10 to 25), get the partial beacon TS 6104 * as well, and calc the delay to the start time. 6105 */ 6106 mask = GENMASK_ULL(25, 10); 6107 beacon_ts_tu = (beacon_ts & mask) >> 10; 6108 st_tu = ttlm_info.switch_time; 6109 delay = st_tu - beacon_ts_tu; 6110 6111 /* 6112 * If the switch time is far in the future, then it 6113 * could also be the previous switch still being 6114 * announced. 6115 * We can simply ignore it for now, if it is a future 6116 * switch the AP will continue to announce it anyway. 6117 */ 6118 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6119 return; 6120 6121 delay_jiffies = TU_TO_JIFFIES(delay); 6122 6123 /* Link switching can take time, so schedule it 6124 * 100ms before to be ready on time 6125 */ 6126 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6127 delay_jiffies -= 6128 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6129 else 6130 delay_jiffies = 0; 6131 6132 sdata->u.mgd.ttlm_info = ttlm_info; 6133 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6134 &sdata->u.mgd.ttlm_work); 6135 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6136 &sdata->u.mgd.ttlm_work, 6137 delay_jiffies); 6138 return; 6139 } 6140 } 6141 } 6142 6143 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6144 struct ieee80211_hdr *hdr, size_t len, 6145 struct ieee80211_rx_status *rx_status) 6146 { 6147 struct ieee80211_sub_if_data *sdata = link->sdata; 6148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6149 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6150 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6151 struct ieee80211_mgmt *mgmt = (void *) hdr; 6152 size_t baselen; 6153 struct ieee802_11_elems *elems; 6154 struct ieee80211_local *local = sdata->local; 6155 struct ieee80211_chanctx_conf *chanctx_conf; 6156 struct ieee80211_supported_band *sband; 6157 struct ieee80211_channel *chan; 6158 struct link_sta_info *link_sta; 6159 struct sta_info *sta; 6160 u64 changed = 0; 6161 bool erp_valid; 6162 u8 erp_value = 0; 6163 u32 ncrc = 0; 6164 u8 *bssid, *variable = mgmt->u.beacon.variable; 6165 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6166 struct ieee80211_elems_parse_params parse_params = { 6167 .link_id = -1, 6168 .from_ap = true, 6169 }; 6170 6171 lockdep_assert_wiphy(local->hw.wiphy); 6172 6173 /* Process beacon from the current BSS */ 6174 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6175 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6176 struct ieee80211_ext *ext = (void *) mgmt; 6177 6178 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6179 variable = ext->u.s1g_short_beacon.variable; 6180 else 6181 variable = ext->u.s1g_beacon.variable; 6182 } 6183 6184 baselen = (u8 *) variable - (u8 *) mgmt; 6185 if (baselen > len) 6186 return; 6187 6188 parse_params.start = variable; 6189 parse_params.len = len - baselen; 6190 6191 rcu_read_lock(); 6192 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6193 if (!chanctx_conf) { 6194 rcu_read_unlock(); 6195 return; 6196 } 6197 6198 if (ieee80211_rx_status_to_khz(rx_status) != 6199 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6200 rcu_read_unlock(); 6201 return; 6202 } 6203 chan = chanctx_conf->def.chan; 6204 rcu_read_unlock(); 6205 6206 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6207 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6208 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6209 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6210 elems = ieee802_11_parse_elems_full(&parse_params); 6211 if (!elems) 6212 return; 6213 6214 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6215 6216 if (elems->dtim_period) 6217 link->u.mgd.dtim_period = elems->dtim_period; 6218 link->u.mgd.have_beacon = true; 6219 ifmgd->assoc_data->need_beacon = false; 6220 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6221 link->conf->sync_tsf = 6222 le64_to_cpu(mgmt->u.beacon.timestamp); 6223 link->conf->sync_device_ts = 6224 rx_status->device_timestamp; 6225 link->conf->sync_dtim_count = elems->dtim_count; 6226 } 6227 6228 if (elems->mbssid_config_ie) 6229 bss_conf->profile_periodicity = 6230 elems->mbssid_config_ie->profile_periodicity; 6231 else 6232 bss_conf->profile_periodicity = 0; 6233 6234 if (elems->ext_capab_len >= 11 && 6235 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6236 bss_conf->ema_ap = true; 6237 else 6238 bss_conf->ema_ap = false; 6239 6240 /* continue assoc process */ 6241 ifmgd->assoc_data->timeout = jiffies; 6242 ifmgd->assoc_data->timeout_started = true; 6243 run_again(sdata, ifmgd->assoc_data->timeout); 6244 kfree(elems); 6245 return; 6246 } 6247 6248 if (!ifmgd->associated || 6249 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 6250 return; 6251 bssid = link->u.mgd.bssid; 6252 6253 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6254 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6255 local, rx_status); 6256 6257 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6258 mlme_dbg_ratelimited(sdata, 6259 "cancelling AP probe due to a received beacon\n"); 6260 ieee80211_reset_ap_probe(sdata); 6261 } 6262 6263 /* 6264 * Push the beacon loss detection into the future since 6265 * we are processing a beacon from the AP just now. 6266 */ 6267 ieee80211_sta_reset_beacon_monitor(sdata); 6268 6269 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6270 * element (which carries the beacon interval). Don't forget to add a 6271 * bit to care_about_ies[] above if mac80211 is interested in a 6272 * changing S1G element. 6273 */ 6274 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6275 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6276 parse_params.bss = link->u.mgd.bss; 6277 parse_params.filter = care_about_ies; 6278 parse_params.crc = ncrc; 6279 elems = ieee802_11_parse_elems_full(&parse_params); 6280 if (!elems) 6281 return; 6282 ncrc = elems->crc; 6283 6284 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6285 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6286 if (local->hw.conf.dynamic_ps_timeout > 0) { 6287 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6288 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6289 ieee80211_hw_config(local, 6290 IEEE80211_CONF_CHANGE_PS); 6291 } 6292 ieee80211_send_nullfunc(local, sdata, false); 6293 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6294 local->pspolling = true; 6295 6296 /* 6297 * Here is assumed that the driver will be 6298 * able to send ps-poll frame and receive a 6299 * response even though power save mode is 6300 * enabled, but some drivers might require 6301 * to disable power save here. This needs 6302 * to be investigated. 6303 */ 6304 ieee80211_send_pspoll(local, sdata); 6305 } 6306 } 6307 6308 if (sdata->vif.p2p || 6309 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6310 struct ieee80211_p2p_noa_attr noa = {}; 6311 int ret; 6312 6313 ret = cfg80211_get_p2p_attr(variable, 6314 len - baselen, 6315 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6316 (u8 *) &noa, sizeof(noa)); 6317 if (ret >= 2) { 6318 if (link->u.mgd.p2p_noa_index != noa.index) { 6319 /* valid noa_attr and index changed */ 6320 link->u.mgd.p2p_noa_index = noa.index; 6321 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6322 changed |= BSS_CHANGED_P2P_PS; 6323 /* 6324 * make sure we update all information, the CRC 6325 * mechanism doesn't look at P2P attributes. 6326 */ 6327 link->u.mgd.beacon_crc_valid = false; 6328 } 6329 } else if (link->u.mgd.p2p_noa_index != -1) { 6330 /* noa_attr not found and we had valid noa_attr before */ 6331 link->u.mgd.p2p_noa_index = -1; 6332 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6333 changed |= BSS_CHANGED_P2P_PS; 6334 link->u.mgd.beacon_crc_valid = false; 6335 } 6336 } 6337 6338 if (link->u.mgd.csa_waiting_bcn) 6339 ieee80211_chswitch_post_beacon(link); 6340 6341 /* 6342 * Update beacon timing and dtim count on every beacon appearance. This 6343 * will allow the driver to use the most updated values. Do it before 6344 * comparing this one with last received beacon. 6345 * IMPORTANT: These parameters would possibly be out of sync by the time 6346 * the driver will use them. The synchronized view is currently 6347 * guaranteed only in certain callbacks. 6348 */ 6349 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6350 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6351 link->conf->sync_tsf = 6352 le64_to_cpu(mgmt->u.beacon.timestamp); 6353 link->conf->sync_device_ts = 6354 rx_status->device_timestamp; 6355 link->conf->sync_dtim_count = elems->dtim_count; 6356 } 6357 6358 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6359 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6360 goto free; 6361 link->u.mgd.beacon_crc = ncrc; 6362 link->u.mgd.beacon_crc_valid = true; 6363 6364 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6365 6366 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6367 rx_status->device_timestamp, 6368 elems, true); 6369 6370 if (!link->u.mgd.disable_wmm_tracking && 6371 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6372 elems->wmm_param_len, 6373 elems->mu_edca_param_set)) 6374 changed |= BSS_CHANGED_QOS; 6375 6376 /* 6377 * If we haven't had a beacon before, tell the driver about the 6378 * DTIM period (and beacon timing if desired) now. 6379 */ 6380 if (!link->u.mgd.have_beacon) { 6381 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6382 bss_conf->dtim_period = elems->dtim_period ?: 1; 6383 6384 changed |= BSS_CHANGED_BEACON_INFO; 6385 link->u.mgd.have_beacon = true; 6386 6387 ieee80211_recalc_ps(local); 6388 6389 ieee80211_recalc_ps_vif(sdata); 6390 } 6391 6392 if (elems->erp_info) { 6393 erp_valid = true; 6394 erp_value = elems->erp_info[0]; 6395 } else { 6396 erp_valid = false; 6397 } 6398 6399 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6400 changed |= ieee80211_handle_bss_capability(link, 6401 le16_to_cpu(mgmt->u.beacon.capab_info), 6402 erp_valid, erp_value); 6403 6404 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6405 if (WARN_ON(!sta)) { 6406 goto free; 6407 } 6408 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6409 lockdep_is_held(&local->hw.wiphy->mtx)); 6410 if (WARN_ON(!link_sta)) { 6411 goto free; 6412 } 6413 6414 if (WARN_ON(!link->conf->chandef.chan)) 6415 goto free; 6416 6417 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 6418 6419 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6420 6421 if (ieee80211_config_bw(link, elems, bssid, &changed)) { 6422 sdata_info(sdata, 6423 "failed to follow AP %pM bandwidth change, disconnect\n", 6424 bssid); 6425 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6426 WLAN_REASON_DEAUTH_LEAVING, 6427 true, deauth_buf); 6428 ieee80211_report_disconnect(sdata, deauth_buf, 6429 sizeof(deauth_buf), true, 6430 WLAN_REASON_DEAUTH_LEAVING, 6431 false); 6432 goto free; 6433 } 6434 6435 if (elems->opmode_notif) 6436 ieee80211_vht_handle_opmode(sdata, link_sta, 6437 *elems->opmode_notif, 6438 rx_status->band); 6439 6440 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6441 elems->country_elem, 6442 elems->country_elem_len, 6443 elems->pwr_constr_elem, 6444 elems->cisco_dtpc_elem); 6445 6446 if (elems->eht_operation && 6447 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 6448 if (!ieee80211_config_puncturing(link, elems->eht_operation, 6449 &changed)) { 6450 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6451 WLAN_REASON_DEAUTH_LEAVING, 6452 true, deauth_buf); 6453 ieee80211_report_disconnect(sdata, deauth_buf, 6454 sizeof(deauth_buf), true, 6455 WLAN_REASON_DEAUTH_LEAVING, 6456 false); 6457 goto free; 6458 } 6459 } 6460 6461 ieee80211_ml_reconfiguration(sdata, elems); 6462 ieee80211_process_adv_ttlm(sdata, elems, 6463 le64_to_cpu(mgmt->u.beacon.timestamp)); 6464 6465 ieee80211_link_info_change_notify(sdata, link, changed); 6466 free: 6467 kfree(elems); 6468 } 6469 6470 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6471 struct ieee80211_neg_ttlm neg_ttlm) 6472 { 6473 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 6474 u8 i; 6475 6476 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 6477 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 6478 6479 /* If there is an active TTLM, unset previously suspended links */ 6480 if (sdata->vif.neg_ttlm.valid) 6481 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 6482 6483 /* exclude links that are already disabled by advertised TTLM */ 6484 new_active_links = 6485 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 6486 new_suspended_links = 6487 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 6488 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 6489 if (ieee80211_ttlm_set_links(sdata, new_active_links, 6490 new_dormant_links, new_suspended_links)) 6491 return; 6492 6493 sdata->vif.neg_ttlm = neg_ttlm; 6494 sdata->vif.neg_ttlm.valid = true; 6495 } 6496 6497 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 6498 struct wiphy_work *work) 6499 { 6500 struct ieee80211_sub_if_data *sdata = 6501 container_of(work, struct ieee80211_sub_if_data, 6502 u.mgd.neg_ttlm_timeout_work.work); 6503 6504 sdata_info(sdata, 6505 "No negotiated TTLM response from AP, disconnecting.\n"); 6506 6507 __ieee80211_disconnect(sdata); 6508 } 6509 6510 static void 6511 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 6512 struct ieee80211_neg_ttlm *neg_ttlm) 6513 { 6514 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 6515 6516 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 6517 sizeof(neg_ttlm->downlink))) { 6518 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 6519 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 6520 } else { 6521 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 6522 } 6523 6524 for (i = 0; i < ARRAY_SIZE(direction); i++) { 6525 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 6526 __le16 map; 6527 6528 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 6529 6530 pos = skb_put(skb, len + 2); 6531 *pos++ = WLAN_EID_EXTENSION; 6532 len_pos = pos++; 6533 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 6534 *pos++ = direction[i]; 6535 map_ind_pos = pos++; 6536 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6537 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 6538 cpu_to_le16(neg_ttlm->uplink[tid]) : 6539 cpu_to_le16(neg_ttlm->downlink[tid]); 6540 if (!map) 6541 continue; 6542 6543 len += 2; 6544 map_ind |= BIT(tid); 6545 skb_put_data(skb, &map, sizeof(map)); 6546 } 6547 6548 *map_ind_pos = map_ind; 6549 *len_pos = len; 6550 6551 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 6552 break; 6553 } 6554 } 6555 6556 static void 6557 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6558 struct ieee80211_neg_ttlm *neg_ttlm, 6559 u8 dialog_token) 6560 { 6561 struct ieee80211_local *local = sdata->local; 6562 struct ieee80211_mgmt *mgmt; 6563 struct sk_buff *skb; 6564 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 6565 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6566 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6567 6568 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6569 if (!skb) 6570 return; 6571 6572 skb_reserve(skb, local->tx_headroom); 6573 mgmt = skb_put_zero(skb, hdr_len); 6574 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6575 IEEE80211_STYPE_ACTION); 6576 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6577 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6578 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6579 6580 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6581 mgmt->u.action.u.ttlm_req.action_code = 6582 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 6583 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 6584 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6585 ieee80211_tx_skb(sdata, skb); 6586 } 6587 6588 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6589 struct cfg80211_ttlm_params *params) 6590 { 6591 struct ieee80211_neg_ttlm neg_ttlm = {}; 6592 u8 i; 6593 6594 if (!ieee80211_vif_is_mld(&sdata->vif) || 6595 !(sdata->vif.cfg.mld_capa_op & 6596 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 6597 return -EINVAL; 6598 6599 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6600 if ((params->dlink[i] & ~sdata->vif.valid_links) || 6601 (params->ulink[i] & ~sdata->vif.valid_links)) 6602 return -EINVAL; 6603 6604 neg_ttlm.downlink[i] = params->dlink[i]; 6605 neg_ttlm.uplink[i] = params->ulink[i]; 6606 } 6607 6608 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 6609 NEG_TTLM_RES_ACCEPT) 6610 return -EINVAL; 6611 6612 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6613 sdata->u.mgd.dialog_token_alloc++; 6614 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 6615 sdata->u.mgd.dialog_token_alloc); 6616 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6617 &sdata->u.mgd.neg_ttlm_timeout_work); 6618 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6619 &sdata->u.mgd.neg_ttlm_timeout_work, 6620 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 6621 return 0; 6622 } 6623 6624 static void 6625 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6626 enum ieee80211_neg_ttlm_res ttlm_res, 6627 u8 dialog_token, 6628 struct ieee80211_neg_ttlm *neg_ttlm) 6629 { 6630 struct ieee80211_local *local = sdata->local; 6631 struct ieee80211_mgmt *mgmt; 6632 struct sk_buff *skb; 6633 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 6634 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6635 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6636 6637 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6638 if (!skb) 6639 return; 6640 6641 skb_reserve(skb, local->tx_headroom); 6642 mgmt = skb_put_zero(skb, hdr_len); 6643 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6644 IEEE80211_STYPE_ACTION); 6645 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6646 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6647 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6648 6649 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6650 mgmt->u.action.u.ttlm_res.action_code = 6651 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 6652 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 6653 switch (ttlm_res) { 6654 default: 6655 WARN_ON(1); 6656 fallthrough; 6657 case NEG_TTLM_RES_REJECT: 6658 mgmt->u.action.u.ttlm_res.status_code = 6659 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 6660 break; 6661 case NEG_TTLM_RES_ACCEPT: 6662 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 6663 break; 6664 case NEG_TTLM_RES_SUGGEST_PREFERRED: 6665 mgmt->u.action.u.ttlm_res.status_code = 6666 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 6667 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6668 break; 6669 } 6670 6671 ieee80211_tx_skb(sdata, skb); 6672 } 6673 6674 static int 6675 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6676 const struct ieee80211_ttlm_elem *ttlm, 6677 struct ieee80211_neg_ttlm *neg_ttlm, 6678 u8 *direction) 6679 { 6680 u8 control, link_map_presence, map_size, tid; 6681 u8 *pos; 6682 6683 /* The element size was already validated in 6684 * ieee80211_tid_to_link_map_size_ok() 6685 */ 6686 pos = (void *)ttlm->optional; 6687 6688 control = ttlm->control; 6689 6690 /* mapping switch time and expected duration fields are not expected 6691 * in case of negotiated TTLM 6692 */ 6693 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 6694 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 6695 mlme_dbg(sdata, 6696 "Invalid TTLM element in negotiated TTLM request\n"); 6697 return -EINVAL; 6698 } 6699 6700 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6701 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6702 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 6703 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 6704 } 6705 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 6706 return 0; 6707 } 6708 6709 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 6710 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 6711 *direction != IEEE80211_TTLM_DIRECTION_UP && 6712 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 6713 return -EINVAL; 6714 6715 link_map_presence = *pos; 6716 pos++; 6717 6718 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6719 map_size = 1; 6720 else 6721 map_size = 2; 6722 6723 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6724 u16 map; 6725 6726 if (link_map_presence & BIT(tid)) { 6727 map = ieee80211_get_ttlm(map_size, pos); 6728 if (!map) { 6729 mlme_dbg(sdata, 6730 "No active links for TID %d", tid); 6731 return -EINVAL; 6732 } 6733 } else { 6734 map = 0; 6735 } 6736 6737 switch (*direction) { 6738 case IEEE80211_TTLM_DIRECTION_BOTH: 6739 neg_ttlm->downlink[tid] = map; 6740 neg_ttlm->uplink[tid] = map; 6741 break; 6742 case IEEE80211_TTLM_DIRECTION_DOWN: 6743 neg_ttlm->downlink[tid] = map; 6744 break; 6745 case IEEE80211_TTLM_DIRECTION_UP: 6746 neg_ttlm->uplink[tid] = map; 6747 break; 6748 default: 6749 return -EINVAL; 6750 } 6751 pos += map_size; 6752 } 6753 return 0; 6754 } 6755 6756 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6757 struct ieee80211_mgmt *mgmt, size_t len) 6758 { 6759 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 6760 size_t ies_len; 6761 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 6762 struct ieee802_11_elems *elems = NULL; 6763 struct ieee80211_neg_ttlm neg_ttlm = {}; 6764 6765 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 6766 6767 if (!ieee80211_vif_is_mld(&sdata->vif)) 6768 return; 6769 6770 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 6771 ies_len = len - offsetof(struct ieee80211_mgmt, 6772 u.action.u.ttlm_req.variable); 6773 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 6774 ies_len, true, NULL); 6775 if (!elems) { 6776 ttlm_res = NEG_TTLM_RES_REJECT; 6777 goto out; 6778 } 6779 6780 for (i = 0; i < elems->ttlm_num; i++) { 6781 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 6782 &neg_ttlm, &direction[i]) || 6783 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 6784 elems->ttlm_num != 1)) { 6785 ttlm_res = NEG_TTLM_RES_REJECT; 6786 goto out; 6787 } 6788 } 6789 6790 if (!elems->ttlm_num || 6791 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 6792 ttlm_res = NEG_TTLM_RES_REJECT; 6793 goto out; 6794 } 6795 6796 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6797 if ((neg_ttlm.downlink[i] && 6798 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 6799 (neg_ttlm.uplink[i] && 6800 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 6801 ttlm_res = NEG_TTLM_RES_REJECT; 6802 goto out; 6803 } 6804 } 6805 6806 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 6807 6808 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 6809 goto out; 6810 6811 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6812 out: 6813 kfree(elems); 6814 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 6815 } 6816 6817 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6818 struct ieee80211_mgmt *mgmt, size_t len) 6819 { 6820 if (!ieee80211_vif_is_mld(&sdata->vif) || 6821 mgmt->u.action.u.ttlm_req.dialog_token != 6822 sdata->u.mgd.dialog_token_alloc) 6823 return; 6824 6825 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6826 &sdata->u.mgd.neg_ttlm_timeout_work); 6827 6828 /* MLD station sends a TID to link mapping request, mainly to handle 6829 * BTM (BSS transition management) request, in which case it needs to 6830 * restrict the active links set. 6831 * In this case it's not expected that the MLD AP will reject the 6832 * negotiated TTLM request. 6833 * This can be better implemented in the future, to handle request 6834 * rejections. 6835 */ 6836 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 6837 __ieee80211_disconnect(sdata); 6838 } 6839 6840 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 6841 struct sk_buff *skb) 6842 { 6843 struct ieee80211_link_data *link = &sdata->deflink; 6844 struct ieee80211_rx_status *rx_status; 6845 struct ieee80211_hdr *hdr; 6846 u16 fc; 6847 6848 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6849 6850 rx_status = (struct ieee80211_rx_status *) skb->cb; 6851 hdr = (struct ieee80211_hdr *) skb->data; 6852 fc = le16_to_cpu(hdr->frame_control); 6853 6854 switch (fc & IEEE80211_FCTL_STYPE) { 6855 case IEEE80211_STYPE_S1G_BEACON: 6856 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 6857 break; 6858 } 6859 } 6860 6861 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 6862 struct sk_buff *skb) 6863 { 6864 struct ieee80211_link_data *link = &sdata->deflink; 6865 struct ieee80211_rx_status *rx_status; 6866 struct ieee80211_mgmt *mgmt; 6867 u16 fc; 6868 int ies_len; 6869 6870 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6871 6872 rx_status = (struct ieee80211_rx_status *) skb->cb; 6873 mgmt = (struct ieee80211_mgmt *) skb->data; 6874 fc = le16_to_cpu(mgmt->frame_control); 6875 6876 if (rx_status->link_valid) { 6877 link = sdata_dereference(sdata->link[rx_status->link_id], 6878 sdata); 6879 if (!link) 6880 return; 6881 } 6882 6883 switch (fc & IEEE80211_FCTL_STYPE) { 6884 case IEEE80211_STYPE_BEACON: 6885 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 6886 skb->len, rx_status); 6887 break; 6888 case IEEE80211_STYPE_PROBE_RESP: 6889 ieee80211_rx_mgmt_probe_resp(link, skb); 6890 break; 6891 case IEEE80211_STYPE_AUTH: 6892 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 6893 break; 6894 case IEEE80211_STYPE_DEAUTH: 6895 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6896 break; 6897 case IEEE80211_STYPE_DISASSOC: 6898 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6899 break; 6900 case IEEE80211_STYPE_ASSOC_RESP: 6901 case IEEE80211_STYPE_REASSOC_RESP: 6902 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6903 break; 6904 case IEEE80211_STYPE_ACTION: 6905 if (!sdata->u.mgd.associated || 6906 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 6907 break; 6908 6909 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6910 struct ieee802_11_elems *elems; 6911 6912 ies_len = skb->len - 6913 offsetof(struct ieee80211_mgmt, 6914 u.action.u.chan_switch.variable); 6915 6916 if (ies_len < 0) 6917 break; 6918 6919 /* CSA IE cannot be overridden, no need for BSSID */ 6920 elems = ieee802_11_parse_elems( 6921 mgmt->u.action.u.chan_switch.variable, 6922 ies_len, true, NULL); 6923 6924 if (elems && !elems->parse_error) 6925 ieee80211_sta_process_chanswitch(link, 6926 rx_status->mactime, 6927 rx_status->device_timestamp, 6928 elems, false); 6929 kfree(elems); 6930 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6931 struct ieee802_11_elems *elems; 6932 6933 ies_len = skb->len - 6934 offsetof(struct ieee80211_mgmt, 6935 u.action.u.ext_chan_switch.variable); 6936 6937 if (ies_len < 0) 6938 break; 6939 6940 /* 6941 * extended CSA IE can't be overridden, no need for 6942 * BSSID 6943 */ 6944 elems = ieee802_11_parse_elems( 6945 mgmt->u.action.u.ext_chan_switch.variable, 6946 ies_len, true, NULL); 6947 6948 if (elems && !elems->parse_error) { 6949 /* for the handling code pretend it was an IE */ 6950 elems->ext_chansw_ie = 6951 &mgmt->u.action.u.ext_chan_switch.data; 6952 6953 ieee80211_sta_process_chanswitch(link, 6954 rx_status->mactime, 6955 rx_status->device_timestamp, 6956 elems, false); 6957 } 6958 6959 kfree(elems); 6960 } 6961 break; 6962 } 6963 } 6964 6965 static void ieee80211_sta_timer(struct timer_list *t) 6966 { 6967 struct ieee80211_sub_if_data *sdata = 6968 from_timer(sdata, t, u.mgd.timer); 6969 6970 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6971 } 6972 6973 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6974 u8 reason, bool tx) 6975 { 6976 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6977 6978 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6979 tx, frame_buf); 6980 6981 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6982 reason, false); 6983 } 6984 6985 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6986 { 6987 struct ieee80211_local *local = sdata->local; 6988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6989 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6990 u32 tx_flags = 0; 6991 u16 trans = 1; 6992 u16 status = 0; 6993 struct ieee80211_prep_tx_info info = { 6994 .subtype = IEEE80211_STYPE_AUTH, 6995 }; 6996 6997 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6998 6999 if (WARN_ON_ONCE(!auth_data)) 7000 return -EINVAL; 7001 7002 auth_data->tries++; 7003 7004 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7005 sdata_info(sdata, "authentication with %pM timed out\n", 7006 auth_data->ap_addr); 7007 7008 /* 7009 * Most likely AP is not in the range so remove the 7010 * bss struct for that AP. 7011 */ 7012 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7013 7014 return -ETIMEDOUT; 7015 } 7016 7017 if (auth_data->algorithm == WLAN_AUTH_SAE) 7018 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7019 7020 info.link_id = auth_data->link_id; 7021 drv_mgd_prepare_tx(local, sdata, &info); 7022 7023 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7024 auth_data->ap_addr, auth_data->tries, 7025 IEEE80211_AUTH_MAX_TRIES); 7026 7027 auth_data->expected_transaction = 2; 7028 7029 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7030 trans = auth_data->sae_trans; 7031 status = auth_data->sae_status; 7032 auth_data->expected_transaction = trans; 7033 } 7034 7035 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7036 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7037 IEEE80211_TX_INTFL_MLME_CONN_TX; 7038 7039 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7040 auth_data->data, auth_data->data_len, 7041 auth_data->ap_addr, auth_data->ap_addr, 7042 NULL, 0, 0, tx_flags); 7043 7044 if (tx_flags == 0) { 7045 if (auth_data->algorithm == WLAN_AUTH_SAE) 7046 auth_data->timeout = jiffies + 7047 IEEE80211_AUTH_TIMEOUT_SAE; 7048 else 7049 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7050 } else { 7051 auth_data->timeout = 7052 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7053 } 7054 7055 auth_data->timeout_started = true; 7056 run_again(sdata, auth_data->timeout); 7057 7058 return 0; 7059 } 7060 7061 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7062 { 7063 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7064 struct ieee80211_local *local = sdata->local; 7065 int ret; 7066 7067 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7068 7069 assoc_data->tries++; 7070 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7071 sdata_info(sdata, "association with %pM timed out\n", 7072 assoc_data->ap_addr); 7073 7074 /* 7075 * Most likely AP is not in the range so remove the 7076 * bss struct for that AP. 7077 */ 7078 cfg80211_unlink_bss(local->hw.wiphy, 7079 assoc_data->link[assoc_data->assoc_link_id].bss); 7080 7081 return -ETIMEDOUT; 7082 } 7083 7084 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7085 assoc_data->ap_addr, assoc_data->tries, 7086 IEEE80211_ASSOC_MAX_TRIES); 7087 ret = ieee80211_send_assoc(sdata); 7088 if (ret) 7089 return ret; 7090 7091 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7092 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7093 assoc_data->timeout_started = true; 7094 run_again(sdata, assoc_data->timeout); 7095 } else { 7096 assoc_data->timeout = 7097 round_jiffies_up(jiffies + 7098 IEEE80211_ASSOC_TIMEOUT_LONG); 7099 assoc_data->timeout_started = true; 7100 run_again(sdata, assoc_data->timeout); 7101 } 7102 7103 return 0; 7104 } 7105 7106 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7107 __le16 fc, bool acked) 7108 { 7109 struct ieee80211_local *local = sdata->local; 7110 7111 sdata->u.mgd.status_fc = fc; 7112 sdata->u.mgd.status_acked = acked; 7113 sdata->u.mgd.status_received = true; 7114 7115 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7116 } 7117 7118 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7119 { 7120 struct ieee80211_local *local = sdata->local; 7121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7122 7123 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7124 7125 if (ifmgd->status_received) { 7126 __le16 fc = ifmgd->status_fc; 7127 bool status_acked = ifmgd->status_acked; 7128 7129 ifmgd->status_received = false; 7130 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7131 if (status_acked) { 7132 if (ifmgd->auth_data->algorithm == 7133 WLAN_AUTH_SAE) 7134 ifmgd->auth_data->timeout = 7135 jiffies + 7136 IEEE80211_AUTH_TIMEOUT_SAE; 7137 else 7138 ifmgd->auth_data->timeout = 7139 jiffies + 7140 IEEE80211_AUTH_TIMEOUT_SHORT; 7141 run_again(sdata, ifmgd->auth_data->timeout); 7142 } else { 7143 ifmgd->auth_data->timeout = jiffies - 1; 7144 } 7145 ifmgd->auth_data->timeout_started = true; 7146 } else if (ifmgd->assoc_data && 7147 !ifmgd->assoc_data->comeback && 7148 (ieee80211_is_assoc_req(fc) || 7149 ieee80211_is_reassoc_req(fc))) { 7150 /* 7151 * Update association timeout based on the TX status 7152 * for the (Re)Association Request frame. Skip this if 7153 * we have already processed a (Re)Association Response 7154 * frame that indicated need for association comeback 7155 * at a specific time in the future. This could happen 7156 * if the TX status information is delayed enough for 7157 * the response to be received and processed first. 7158 */ 7159 if (status_acked) { 7160 ifmgd->assoc_data->timeout = 7161 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7162 run_again(sdata, ifmgd->assoc_data->timeout); 7163 } else { 7164 ifmgd->assoc_data->timeout = jiffies - 1; 7165 } 7166 ifmgd->assoc_data->timeout_started = true; 7167 } 7168 } 7169 7170 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7171 time_after(jiffies, ifmgd->auth_data->timeout)) { 7172 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7173 /* 7174 * ok ... we waited for assoc or continuation but 7175 * userspace didn't do it, so kill the auth data 7176 */ 7177 ieee80211_destroy_auth_data(sdata, false); 7178 } else if (ieee80211_auth(sdata)) { 7179 u8 ap_addr[ETH_ALEN]; 7180 struct ieee80211_event event = { 7181 .type = MLME_EVENT, 7182 .u.mlme.data = AUTH_EVENT, 7183 .u.mlme.status = MLME_TIMEOUT, 7184 }; 7185 7186 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7187 7188 ieee80211_destroy_auth_data(sdata, false); 7189 7190 cfg80211_auth_timeout(sdata->dev, ap_addr); 7191 drv_event_callback(sdata->local, sdata, &event); 7192 } 7193 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7194 run_again(sdata, ifmgd->auth_data->timeout); 7195 7196 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7197 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7198 if ((ifmgd->assoc_data->need_beacon && 7199 !sdata->deflink.u.mgd.have_beacon) || 7200 ieee80211_do_assoc(sdata)) { 7201 struct ieee80211_event event = { 7202 .type = MLME_EVENT, 7203 .u.mlme.data = ASSOC_EVENT, 7204 .u.mlme.status = MLME_TIMEOUT, 7205 }; 7206 7207 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7208 drv_event_callback(sdata->local, sdata, &event); 7209 } 7210 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7211 run_again(sdata, ifmgd->assoc_data->timeout); 7212 7213 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7214 ifmgd->associated) { 7215 u8 *bssid = sdata->deflink.u.mgd.bssid; 7216 int max_tries; 7217 7218 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7219 max_tries = max_nullfunc_tries; 7220 else 7221 max_tries = max_probe_tries; 7222 7223 /* ACK received for nullfunc probing frame */ 7224 if (!ifmgd->probe_send_count) 7225 ieee80211_reset_ap_probe(sdata); 7226 else if (ifmgd->nullfunc_failed) { 7227 if (ifmgd->probe_send_count < max_tries) { 7228 mlme_dbg(sdata, 7229 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7230 bssid, ifmgd->probe_send_count, 7231 max_tries); 7232 ieee80211_mgd_probe_ap_send(sdata); 7233 } else { 7234 mlme_dbg(sdata, 7235 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7236 bssid); 7237 ieee80211_sta_connection_lost(sdata, 7238 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7239 false); 7240 } 7241 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7242 run_again(sdata, ifmgd->probe_timeout); 7243 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7244 mlme_dbg(sdata, 7245 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7246 bssid, probe_wait_ms); 7247 ieee80211_sta_connection_lost(sdata, 7248 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7249 } else if (ifmgd->probe_send_count < max_tries) { 7250 mlme_dbg(sdata, 7251 "No probe response from AP %pM after %dms, try %d/%i\n", 7252 bssid, probe_wait_ms, 7253 ifmgd->probe_send_count, max_tries); 7254 ieee80211_mgd_probe_ap_send(sdata); 7255 } else { 7256 /* 7257 * We actually lost the connection ... or did we? 7258 * Let's make sure! 7259 */ 7260 mlme_dbg(sdata, 7261 "No probe response from AP %pM after %dms, disconnecting.\n", 7262 bssid, probe_wait_ms); 7263 7264 ieee80211_sta_connection_lost(sdata, 7265 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7266 } 7267 } 7268 } 7269 7270 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7271 { 7272 struct ieee80211_sub_if_data *sdata = 7273 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7274 7275 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7276 return; 7277 7278 if (sdata->vif.bss_conf.csa_active && 7279 !sdata->deflink.u.mgd.csa_waiting_bcn) 7280 return; 7281 7282 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7283 return; 7284 7285 sdata->u.mgd.connection_loss = false; 7286 wiphy_work_queue(sdata->local->hw.wiphy, 7287 &sdata->u.mgd.beacon_connection_loss_work); 7288 } 7289 7290 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7291 { 7292 struct ieee80211_sub_if_data *sdata = 7293 from_timer(sdata, t, u.mgd.conn_mon_timer); 7294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7295 struct ieee80211_local *local = sdata->local; 7296 struct sta_info *sta; 7297 unsigned long timeout; 7298 7299 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7300 return; 7301 7302 if (sdata->vif.bss_conf.csa_active && 7303 !sdata->deflink.u.mgd.csa_waiting_bcn) 7304 return; 7305 7306 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7307 if (!sta) 7308 return; 7309 7310 timeout = sta->deflink.status_stats.last_ack; 7311 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7312 timeout = sta->deflink.rx_stats.last_rx; 7313 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7314 7315 /* If timeout is after now, then update timer to fire at 7316 * the later date, but do not actually probe at this time. 7317 */ 7318 if (time_is_after_jiffies(timeout)) { 7319 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7320 return; 7321 } 7322 7323 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7324 } 7325 7326 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7327 struct wiphy_work *work) 7328 { 7329 struct ieee80211_sub_if_data *sdata = 7330 container_of(work, struct ieee80211_sub_if_data, 7331 u.mgd.monitor_work); 7332 7333 ieee80211_mgd_probe_ap(sdata, false); 7334 } 7335 7336 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7337 { 7338 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7339 __ieee80211_stop_poll(sdata); 7340 7341 /* let's probe the connection once */ 7342 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7343 wiphy_work_queue(sdata->local->hw.wiphy, 7344 &sdata->u.mgd.monitor_work); 7345 } 7346 } 7347 7348 #ifdef CONFIG_PM 7349 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7350 { 7351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7352 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7353 7354 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7355 7356 if (ifmgd->auth_data || ifmgd->assoc_data) { 7357 const u8 *ap_addr = ifmgd->auth_data ? 7358 ifmgd->auth_data->ap_addr : 7359 ifmgd->assoc_data->ap_addr; 7360 7361 /* 7362 * If we are trying to authenticate / associate while suspending, 7363 * cfg80211 won't know and won't actually abort those attempts, 7364 * thus we need to do that ourselves. 7365 */ 7366 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7367 IEEE80211_STYPE_DEAUTH, 7368 WLAN_REASON_DEAUTH_LEAVING, 7369 false, frame_buf); 7370 if (ifmgd->assoc_data) 7371 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7372 if (ifmgd->auth_data) 7373 ieee80211_destroy_auth_data(sdata, false); 7374 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7375 IEEE80211_DEAUTH_FRAME_LEN, 7376 false); 7377 } 7378 7379 /* This is a bit of a hack - we should find a better and more generic 7380 * solution to this. Normally when suspending, cfg80211 will in fact 7381 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7382 * auth (not so important) or assoc (this is the problem) process. 7383 * 7384 * As a consequence, it can happen that we are in the process of both 7385 * associating and suspending, and receive an association response 7386 * after cfg80211 has checked if it needs to disconnect, but before 7387 * we actually set the flag to drop incoming frames. This will then 7388 * cause the workqueue flush to process the association response in 7389 * the suspend, resulting in a successful association just before it 7390 * tries to remove the interface from the driver, which now though 7391 * has a channel context assigned ... this results in issues. 7392 * 7393 * To work around this (for now) simply deauth here again if we're 7394 * now connected. 7395 */ 7396 if (ifmgd->associated && !sdata->local->wowlan) { 7397 u8 bssid[ETH_ALEN]; 7398 struct cfg80211_deauth_request req = { 7399 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 7400 .bssid = bssid, 7401 }; 7402 7403 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7404 ieee80211_mgd_deauth(sdata, &req); 7405 } 7406 } 7407 #endif 7408 7409 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 7410 { 7411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7412 7413 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7414 7415 if (!ifmgd->associated) 7416 return; 7417 7418 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 7419 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 7420 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 7421 ieee80211_sta_connection_lost(sdata, 7422 WLAN_REASON_UNSPECIFIED, 7423 true); 7424 return; 7425 } 7426 7427 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 7428 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 7429 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 7430 ieee80211_sta_connection_lost(sdata, 7431 WLAN_REASON_UNSPECIFIED, 7432 true); 7433 return; 7434 } 7435 } 7436 7437 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 7438 struct wiphy_work *work) 7439 { 7440 struct ieee80211_link_data *link = 7441 container_of(work, struct ieee80211_link_data, 7442 u.mgd.request_smps_work); 7443 7444 __ieee80211_request_smps_mgd(link->sdata, link, 7445 link->u.mgd.driver_smps_mode); 7446 } 7447 7448 /* interface setup */ 7449 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 7450 { 7451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7452 7453 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 7454 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 7455 ieee80211_beacon_connection_loss_work); 7456 wiphy_work_init(&ifmgd->csa_connection_drop_work, 7457 ieee80211_csa_connection_drop_work); 7458 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 7459 ieee80211_tdls_peer_del_work); 7460 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 7461 ieee80211_ml_reconf_work); 7462 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 7463 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 7464 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 7465 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 7466 ieee80211_sta_handle_tspec_ac_params_wk); 7467 wiphy_delayed_work_init(&ifmgd->ttlm_work, 7468 ieee80211_tid_to_link_map_work); 7469 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 7470 ieee80211_neg_ttlm_timeout_work); 7471 7472 ifmgd->flags = 0; 7473 ifmgd->powersave = sdata->wdev.ps; 7474 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 7475 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 7476 /* Setup TDLS data */ 7477 spin_lock_init(&ifmgd->teardown_lock); 7478 ifmgd->teardown_skb = NULL; 7479 ifmgd->orig_teardown_skb = NULL; 7480 } 7481 7482 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 7483 struct wiphy_work *work) 7484 { 7485 struct ieee80211_link_data *link = 7486 container_of(work, struct ieee80211_link_data, 7487 u.mgd.recalc_smps); 7488 7489 ieee80211_recalc_smps(link->sdata, link); 7490 } 7491 7492 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 7493 { 7494 struct ieee80211_sub_if_data *sdata = link->sdata; 7495 struct ieee80211_local *local = sdata->local; 7496 unsigned int link_id = link->link_id; 7497 7498 link->u.mgd.p2p_noa_index = -1; 7499 link->u.mgd.conn_flags = 0; 7500 link->conf->bssid = link->u.mgd.bssid; 7501 7502 wiphy_work_init(&link->u.mgd.request_smps_work, 7503 ieee80211_request_smps_mgd_work); 7504 wiphy_work_init(&link->u.mgd.recalc_smps, 7505 ieee80211_recalc_smps_work); 7506 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 7507 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 7508 else 7509 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 7510 7511 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 7512 ieee80211_chswitch_work); 7513 7514 if (sdata->u.mgd.assoc_data) 7515 ether_addr_copy(link->conf->addr, 7516 sdata->u.mgd.assoc_data->link[link_id].addr); 7517 else if (!is_valid_ether_addr(link->conf->addr)) 7518 eth_random_addr(link->conf->addr); 7519 } 7520 7521 /* scan finished notification */ 7522 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 7523 { 7524 struct ieee80211_sub_if_data *sdata; 7525 7526 /* Restart STA timers */ 7527 rcu_read_lock(); 7528 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 7529 if (ieee80211_sdata_running(sdata)) 7530 ieee80211_restart_sta_timer(sdata); 7531 } 7532 rcu_read_unlock(); 7533 } 7534 7535 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 7536 struct cfg80211_bss *cbss, s8 link_id, 7537 const u8 *ap_mld_addr, bool assoc, 7538 bool override) 7539 { 7540 struct ieee80211_local *local = sdata->local; 7541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7542 struct ieee80211_bss *bss = (void *)cbss->priv; 7543 struct sta_info *new_sta = NULL; 7544 struct ieee80211_link_data *link; 7545 bool have_sta = false; 7546 bool mlo; 7547 int err; 7548 7549 if (link_id >= 0) { 7550 mlo = true; 7551 if (WARN_ON(!ap_mld_addr)) 7552 return -EINVAL; 7553 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 7554 } else { 7555 if (WARN_ON(ap_mld_addr)) 7556 return -EINVAL; 7557 ap_mld_addr = cbss->bssid; 7558 err = ieee80211_vif_set_links(sdata, 0, 0); 7559 link_id = 0; 7560 mlo = false; 7561 } 7562 7563 if (err) 7564 return err; 7565 7566 link = sdata_dereference(sdata->link[link_id], sdata); 7567 if (WARN_ON(!link)) { 7568 err = -ENOLINK; 7569 goto out_err; 7570 } 7571 7572 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 7573 err = -EINVAL; 7574 goto out_err; 7575 } 7576 7577 /* If a reconfig is happening, bail out */ 7578 if (local->in_reconfig) { 7579 err = -EBUSY; 7580 goto out_err; 7581 } 7582 7583 if (assoc) { 7584 rcu_read_lock(); 7585 have_sta = sta_info_get(sdata, ap_mld_addr); 7586 rcu_read_unlock(); 7587 } 7588 7589 if (!have_sta) { 7590 if (mlo) 7591 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 7592 link_id, cbss->bssid, 7593 GFP_KERNEL); 7594 else 7595 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 7596 7597 if (!new_sta) { 7598 err = -ENOMEM; 7599 goto out_err; 7600 } 7601 7602 new_sta->sta.mlo = mlo; 7603 } 7604 7605 /* 7606 * Set up the information for the new channel before setting the 7607 * new channel. We can't - completely race-free - change the basic 7608 * rates bitmap and the channel (sband) that it refers to, but if 7609 * we set it up before we at least avoid calling into the driver's 7610 * bss_info_changed() method with invalid information (since we do 7611 * call that from changing the channel - only for IDLE and perhaps 7612 * some others, but ...). 7613 * 7614 * So to avoid that, just set up all the new information before the 7615 * channel, but tell the driver to apply it only afterwards, since 7616 * it might need the new channel for that. 7617 */ 7618 if (new_sta) { 7619 const struct cfg80211_bss_ies *ies; 7620 struct link_sta_info *link_sta; 7621 7622 rcu_read_lock(); 7623 link_sta = rcu_dereference(new_sta->link[link_id]); 7624 if (WARN_ON(!link_sta)) { 7625 rcu_read_unlock(); 7626 sta_info_free(local, new_sta); 7627 err = -EINVAL; 7628 goto out_err; 7629 } 7630 7631 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7632 link_sta, cbss); 7633 if (err) { 7634 rcu_read_unlock(); 7635 sta_info_free(local, new_sta); 7636 goto out_err; 7637 } 7638 7639 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7640 7641 /* set timing information */ 7642 link->conf->beacon_int = cbss->beacon_interval; 7643 ies = rcu_dereference(cbss->beacon_ies); 7644 if (ies) { 7645 link->conf->sync_tsf = ies->tsf; 7646 link->conf->sync_device_ts = 7647 bss->device_ts_beacon; 7648 7649 ieee80211_get_dtim(ies, 7650 &link->conf->sync_dtim_count, 7651 NULL); 7652 } else if (!ieee80211_hw_check(&sdata->local->hw, 7653 TIMING_BEACON_ONLY)) { 7654 ies = rcu_dereference(cbss->proberesp_ies); 7655 /* must be non-NULL since beacon IEs were NULL */ 7656 link->conf->sync_tsf = ies->tsf; 7657 link->conf->sync_device_ts = 7658 bss->device_ts_presp; 7659 link->conf->sync_dtim_count = 0; 7660 } else { 7661 link->conf->sync_tsf = 0; 7662 link->conf->sync_device_ts = 0; 7663 link->conf->sync_dtim_count = 0; 7664 } 7665 rcu_read_unlock(); 7666 } 7667 7668 if (new_sta || override) { 7669 err = ieee80211_prep_channel(sdata, link, cbss, mlo, 7670 &link->u.mgd.conn_flags); 7671 if (err) { 7672 if (new_sta) 7673 sta_info_free(local, new_sta); 7674 goto out_err; 7675 } 7676 } 7677 7678 if (new_sta) { 7679 /* 7680 * tell driver about BSSID, basic rates and timing 7681 * this was set up above, before setting the channel 7682 */ 7683 ieee80211_link_info_change_notify(sdata, link, 7684 BSS_CHANGED_BSSID | 7685 BSS_CHANGED_BASIC_RATES | 7686 BSS_CHANGED_BEACON_INT); 7687 7688 if (assoc) 7689 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7690 7691 err = sta_info_insert(new_sta); 7692 new_sta = NULL; 7693 if (err) { 7694 sdata_info(sdata, 7695 "failed to insert STA entry for the AP (error %d)\n", 7696 err); 7697 goto out_err; 7698 } 7699 } else 7700 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7701 7702 /* Cancel scan to ensure that nothing interferes with connection */ 7703 if (local->scanning) 7704 ieee80211_scan_cancel(local); 7705 7706 return 0; 7707 7708 out_err: 7709 ieee80211_link_release_channel(&sdata->deflink); 7710 ieee80211_vif_set_links(sdata, 0, 0); 7711 return err; 7712 } 7713 7714 /* config hooks */ 7715 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 7716 struct cfg80211_auth_request *req) 7717 { 7718 struct ieee80211_local *local = sdata->local; 7719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7720 struct ieee80211_mgd_auth_data *auth_data; 7721 struct ieee80211_link_data *link; 7722 const struct element *csa_elem, *ecsa_elem; 7723 u16 auth_alg; 7724 int err; 7725 bool cont_auth; 7726 7727 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7728 7729 /* prepare auth data structure */ 7730 7731 switch (req->auth_type) { 7732 case NL80211_AUTHTYPE_OPEN_SYSTEM: 7733 auth_alg = WLAN_AUTH_OPEN; 7734 break; 7735 case NL80211_AUTHTYPE_SHARED_KEY: 7736 if (fips_enabled) 7737 return -EOPNOTSUPP; 7738 auth_alg = WLAN_AUTH_SHARED_KEY; 7739 break; 7740 case NL80211_AUTHTYPE_FT: 7741 auth_alg = WLAN_AUTH_FT; 7742 break; 7743 case NL80211_AUTHTYPE_NETWORK_EAP: 7744 auth_alg = WLAN_AUTH_LEAP; 7745 break; 7746 case NL80211_AUTHTYPE_SAE: 7747 auth_alg = WLAN_AUTH_SAE; 7748 break; 7749 case NL80211_AUTHTYPE_FILS_SK: 7750 auth_alg = WLAN_AUTH_FILS_SK; 7751 break; 7752 case NL80211_AUTHTYPE_FILS_SK_PFS: 7753 auth_alg = WLAN_AUTH_FILS_SK_PFS; 7754 break; 7755 case NL80211_AUTHTYPE_FILS_PK: 7756 auth_alg = WLAN_AUTH_FILS_PK; 7757 break; 7758 default: 7759 return -EOPNOTSUPP; 7760 } 7761 7762 if (ifmgd->assoc_data) 7763 return -EBUSY; 7764 7765 rcu_read_lock(); 7766 csa_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_CHANNEL_SWITCH); 7767 ecsa_elem = ieee80211_bss_get_elem(req->bss, 7768 WLAN_EID_EXT_CHANSWITCH_ANN); 7769 if ((csa_elem && 7770 csa_elem->datalen == sizeof(struct ieee80211_channel_sw_ie) && 7771 ((struct ieee80211_channel_sw_ie *)csa_elem->data)->count != 0) || 7772 (ecsa_elem && 7773 ecsa_elem->datalen == sizeof(struct ieee80211_ext_chansw_ie) && 7774 ((struct ieee80211_ext_chansw_ie *)ecsa_elem->data)->count != 0)) { 7775 rcu_read_unlock(); 7776 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 7777 return -EINVAL; 7778 } 7779 rcu_read_unlock(); 7780 7781 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 7782 req->ie_len, GFP_KERNEL); 7783 if (!auth_data) 7784 return -ENOMEM; 7785 7786 memcpy(auth_data->ap_addr, 7787 req->ap_mld_addr ?: req->bss->bssid, 7788 ETH_ALEN); 7789 auth_data->bss = req->bss; 7790 auth_data->link_id = req->link_id; 7791 7792 if (req->auth_data_len >= 4) { 7793 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 7794 __le16 *pos = (__le16 *) req->auth_data; 7795 7796 auth_data->sae_trans = le16_to_cpu(pos[0]); 7797 auth_data->sae_status = le16_to_cpu(pos[1]); 7798 } 7799 memcpy(auth_data->data, req->auth_data + 4, 7800 req->auth_data_len - 4); 7801 auth_data->data_len += req->auth_data_len - 4; 7802 } 7803 7804 /* Check if continuing authentication or trying to authenticate with the 7805 * same BSS that we were in the process of authenticating with and avoid 7806 * removal and re-addition of the STA entry in 7807 * ieee80211_prep_connection(). 7808 */ 7809 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 7810 ifmgd->auth_data->link_id == req->link_id; 7811 7812 if (req->ie && req->ie_len) { 7813 memcpy(&auth_data->data[auth_data->data_len], 7814 req->ie, req->ie_len); 7815 auth_data->data_len += req->ie_len; 7816 } 7817 7818 if (req->key && req->key_len) { 7819 auth_data->key_len = req->key_len; 7820 auth_data->key_idx = req->key_idx; 7821 memcpy(auth_data->key, req->key, req->key_len); 7822 } 7823 7824 auth_data->algorithm = auth_alg; 7825 7826 /* try to authenticate/probe */ 7827 7828 if (ifmgd->auth_data) { 7829 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 7830 auth_data->peer_confirmed = 7831 ifmgd->auth_data->peer_confirmed; 7832 } 7833 ieee80211_destroy_auth_data(sdata, cont_auth); 7834 } 7835 7836 /* prep auth_data so we don't go into idle on disassoc */ 7837 ifmgd->auth_data = auth_data; 7838 7839 /* If this is continuation of an ongoing SAE authentication exchange 7840 * (i.e., request to send SAE Confirm) and the peer has already 7841 * confirmed, mark authentication completed since we are about to send 7842 * out SAE Confirm. 7843 */ 7844 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 7845 auth_data->peer_confirmed && auth_data->sae_trans == 2) 7846 ieee80211_mark_sta_auth(sdata); 7847 7848 if (ifmgd->associated) { 7849 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7850 7851 sdata_info(sdata, 7852 "disconnect from AP %pM for new auth to %pM\n", 7853 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 7854 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7855 WLAN_REASON_UNSPECIFIED, 7856 false, frame_buf); 7857 7858 ieee80211_report_disconnect(sdata, frame_buf, 7859 sizeof(frame_buf), true, 7860 WLAN_REASON_UNSPECIFIED, 7861 false); 7862 } 7863 7864 /* needed for transmitting the auth frame(s) properly */ 7865 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 7866 7867 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 7868 req->ap_mld_addr, cont_auth, false); 7869 if (err) 7870 goto err_clear; 7871 7872 if (req->link_id >= 0) 7873 link = sdata_dereference(sdata->link[req->link_id], sdata); 7874 else 7875 link = &sdata->deflink; 7876 7877 if (WARN_ON(!link)) { 7878 err = -ENOLINK; 7879 goto err_clear; 7880 } 7881 7882 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 7883 auth_data->ap_addr, link->conf->addr); 7884 7885 err = ieee80211_auth(sdata); 7886 if (err) { 7887 sta_info_destroy_addr(sdata, auth_data->ap_addr); 7888 goto err_clear; 7889 } 7890 7891 /* hold our own reference */ 7892 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 7893 return 0; 7894 7895 err_clear: 7896 if (!ieee80211_vif_is_mld(&sdata->vif)) { 7897 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7898 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7899 BSS_CHANGED_BSSID); 7900 ieee80211_link_release_channel(&sdata->deflink); 7901 } 7902 ifmgd->auth_data = NULL; 7903 kfree(auth_data); 7904 return err; 7905 } 7906 7907 static ieee80211_conn_flags_t 7908 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 7909 struct ieee80211_mgd_assoc_data *assoc_data, 7910 struct cfg80211_assoc_request *req, 7911 ieee80211_conn_flags_t conn_flags, 7912 unsigned int link_id) 7913 { 7914 struct ieee80211_local *local = sdata->local; 7915 const struct cfg80211_bss_ies *bss_ies; 7916 struct ieee80211_supported_band *sband; 7917 const struct element *ht_elem, *vht_elem; 7918 struct ieee80211_link_data *link; 7919 struct cfg80211_bss *cbss; 7920 struct ieee80211_bss *bss; 7921 bool is_5ghz, is_6ghz; 7922 7923 cbss = assoc_data->link[link_id].bss; 7924 if (WARN_ON(!cbss)) 7925 return 0; 7926 7927 bss = (void *)cbss->priv; 7928 7929 sband = local->hw.wiphy->bands[cbss->channel->band]; 7930 if (WARN_ON(!sband)) 7931 return 0; 7932 7933 link = sdata_dereference(sdata->link[link_id], sdata); 7934 if (WARN_ON(!link)) 7935 return 0; 7936 7937 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 7938 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 7939 7940 /* for MLO connections assume advertising all rates is OK */ 7941 if (!req->ap_mld_addr) { 7942 assoc_data->supp_rates = bss->supp_rates; 7943 assoc_data->supp_rates_len = bss->supp_rates_len; 7944 } 7945 7946 /* copy and link elems for the STA profile */ 7947 if (req->links[link_id].elems_len) { 7948 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7949 req->links[link_id].elems_len); 7950 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7951 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7952 assoc_data->ie_pos += req->links[link_id].elems_len; 7953 } 7954 7955 rcu_read_lock(); 7956 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7957 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7958 assoc_data->link[link_id].ap_ht_param = 7959 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7960 else if (!is_6ghz) 7961 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7962 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7963 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7964 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7965 sizeof(struct ieee80211_vht_cap)); 7966 } else if (is_5ghz) { 7967 link_info(link, 7968 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7969 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7970 IEEE80211_CONN_DISABLE_HE | 7971 IEEE80211_CONN_DISABLE_EHT; 7972 } 7973 rcu_read_unlock(); 7974 7975 link->u.mgd.beacon_crc_valid = false; 7976 link->u.mgd.dtim_period = 0; 7977 link->u.mgd.have_beacon = false; 7978 7979 /* override HT/VHT configuration only if the AP and we support it */ 7980 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7981 struct ieee80211_sta_ht_cap sta_ht_cap; 7982 7983 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7984 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7985 } 7986 7987 link->conf->eht_puncturing = 0; 7988 7989 rcu_read_lock(); 7990 bss_ies = rcu_dereference(cbss->beacon_ies); 7991 if (bss_ies) { 7992 u8 dtim_count = 0; 7993 7994 ieee80211_get_dtim(bss_ies, &dtim_count, 7995 &link->u.mgd.dtim_period); 7996 7997 sdata->deflink.u.mgd.have_beacon = true; 7998 7999 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8000 link->conf->sync_tsf = bss_ies->tsf; 8001 link->conf->sync_device_ts = bss->device_ts_beacon; 8002 link->conf->sync_dtim_count = dtim_count; 8003 } 8004 } else { 8005 bss_ies = rcu_dereference(cbss->ies); 8006 } 8007 8008 if (bss_ies) { 8009 const struct ieee80211_eht_operation *eht_oper; 8010 const struct element *elem; 8011 8012 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8013 bss_ies->data, bss_ies->len); 8014 if (elem && elem->datalen >= 3) 8015 link->conf->profile_periodicity = elem->data[2]; 8016 else 8017 link->conf->profile_periodicity = 0; 8018 8019 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8020 bss_ies->data, bss_ies->len); 8021 if (elem && elem->datalen >= 11 && 8022 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8023 link->conf->ema_ap = true; 8024 else 8025 link->conf->ema_ap = false; 8026 8027 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 8028 bss_ies->data, bss_ies->len); 8029 eht_oper = (const void *)(elem->data + 1); 8030 8031 if (elem && 8032 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 8033 elem->datalen - 1) && 8034 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 8035 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 8036 const struct ieee80211_eht_operation_info *info = 8037 (void *)eht_oper->optional; 8038 const u8 *disable_subchannel_bitmap = info->optional; 8039 u16 bitmap; 8040 8041 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 8042 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 8043 &link->conf->chandef) && 8044 !(bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING))) 8045 ieee80211_handle_puncturing_bitmap(link, 8046 eht_oper, 8047 bitmap, 8048 NULL); 8049 else 8050 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 8051 } 8052 } 8053 rcu_read_unlock(); 8054 8055 if (bss->corrupt_data) { 8056 char *corrupt_type = "data"; 8057 8058 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8059 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8060 corrupt_type = "beacon and probe response"; 8061 else 8062 corrupt_type = "beacon"; 8063 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8064 corrupt_type = "probe response"; 8065 } 8066 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8067 cbss->bssid, corrupt_type); 8068 } 8069 8070 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8071 if (sdata->u.mgd.powersave) 8072 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8073 else 8074 link->smps_mode = IEEE80211_SMPS_OFF; 8075 } else { 8076 link->smps_mode = link->u.mgd.req_smps; 8077 } 8078 8079 return conn_flags; 8080 } 8081 8082 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8083 struct cfg80211_assoc_request *req) 8084 { 8085 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8086 struct ieee80211_local *local = sdata->local; 8087 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8088 struct ieee80211_mgd_assoc_data *assoc_data; 8089 const struct element *ssid_elem, *csa_elem, *ecsa_elem; 8090 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8091 ieee80211_conn_flags_t conn_flags = 0; 8092 struct ieee80211_link_data *link; 8093 struct cfg80211_bss *cbss; 8094 struct ieee80211_bss *bss; 8095 bool override; 8096 int i, err; 8097 size_t size = sizeof(*assoc_data) + req->ie_len; 8098 8099 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8100 size += req->links[i].elems_len; 8101 8102 /* FIXME: no support for 4-addr MLO yet */ 8103 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8104 return -EOPNOTSUPP; 8105 8106 assoc_data = kzalloc(size, GFP_KERNEL); 8107 if (!assoc_data) 8108 return -ENOMEM; 8109 8110 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8111 8112 rcu_read_lock(); 8113 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8114 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8115 rcu_read_unlock(); 8116 kfree(assoc_data); 8117 return -EINVAL; 8118 } 8119 8120 csa_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_CHANNEL_SWITCH); 8121 ecsa_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_EXT_CHANSWITCH_ANN); 8122 if ((csa_elem && 8123 csa_elem->datalen == sizeof(struct ieee80211_channel_sw_ie) && 8124 ((struct ieee80211_channel_sw_ie *)csa_elem->data)->count != 0) || 8125 (ecsa_elem && 8126 ecsa_elem->datalen == sizeof(struct ieee80211_ext_chansw_ie) && 8127 ((struct ieee80211_ext_chansw_ie *)ecsa_elem->data)->count != 0)) { 8128 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8129 rcu_read_unlock(); 8130 kfree(assoc_data); 8131 return -EINVAL; 8132 } 8133 8134 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8135 assoc_data->ssid_len = ssid_elem->datalen; 8136 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 8137 vif_cfg->ssid_len = assoc_data->ssid_len; 8138 rcu_read_unlock(); 8139 8140 if (req->ap_mld_addr) { 8141 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8142 if (!req->links[i].bss) 8143 continue; 8144 link = sdata_dereference(sdata->link[i], sdata); 8145 if (link) 8146 ether_addr_copy(assoc_data->link[i].addr, 8147 link->conf->addr); 8148 else 8149 eth_random_addr(assoc_data->link[i].addr); 8150 } 8151 } else { 8152 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8153 } 8154 8155 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8156 8157 memcpy(assoc_data->ap_addr, 8158 req->ap_mld_addr ?: req->bss->bssid, 8159 ETH_ALEN); 8160 8161 if (ifmgd->associated) { 8162 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8163 8164 sdata_info(sdata, 8165 "disconnect from AP %pM for new assoc to %pM\n", 8166 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8167 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8168 WLAN_REASON_UNSPECIFIED, 8169 false, frame_buf); 8170 8171 ieee80211_report_disconnect(sdata, frame_buf, 8172 sizeof(frame_buf), true, 8173 WLAN_REASON_UNSPECIFIED, 8174 false); 8175 } 8176 8177 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8178 err = -EBUSY; 8179 goto err_free; 8180 } 8181 8182 if (ifmgd->assoc_data) { 8183 err = -EBUSY; 8184 goto err_free; 8185 } 8186 8187 if (ifmgd->auth_data) { 8188 bool match; 8189 8190 /* keep sta info, bssid if matching */ 8191 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 8192 assoc_data->ap_addr) && 8193 ifmgd->auth_data->link_id == req->link_id; 8194 8195 /* Cleanup is delayed if auth_data matches */ 8196 if (!match) 8197 ieee80211_destroy_auth_data(sdata, false); 8198 } 8199 8200 /* prepare assoc data */ 8201 8202 bss = (void *)cbss->priv; 8203 assoc_data->wmm = bss->wmm_used && 8204 (local->hw.queues >= IEEE80211_NUM_ACS); 8205 8206 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8207 8208 /* 8209 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 8210 * We still associate in non-HT mode (11a/b/g) if any one of these 8211 * ciphers is configured as pairwise. 8212 * We can set this to true for non-11n hardware, that'll be checked 8213 * separately along with the peer capabilities. 8214 */ 8215 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 8216 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 8217 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 8218 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 8219 conn_flags |= IEEE80211_CONN_DISABLE_HT; 8220 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 8221 conn_flags |= IEEE80211_CONN_DISABLE_HE; 8222 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 8223 netdev_info(sdata->dev, 8224 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 8225 } 8226 } 8227 8228 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 8229 if (!bss->wmm_used) { 8230 conn_flags |= IEEE80211_CONN_DISABLE_HT; 8231 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 8232 conn_flags |= IEEE80211_CONN_DISABLE_HE; 8233 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 8234 netdev_info(sdata->dev, 8235 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 8236 } 8237 8238 if (req->flags & ASSOC_REQ_DISABLE_HT) { 8239 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 8240 conn_flags |= IEEE80211_CONN_DISABLE_HT; 8241 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 8242 conn_flags |= IEEE80211_CONN_DISABLE_HE; 8243 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 8244 } 8245 8246 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 8247 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 8248 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 8249 } 8250 8251 if (req->flags & ASSOC_REQ_DISABLE_HE) { 8252 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 8253 conn_flags |= IEEE80211_CONN_DISABLE_HE; 8254 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 8255 } 8256 8257 if (req->flags & ASSOC_REQ_DISABLE_EHT) 8258 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 8259 8260 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8261 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8262 sizeof(ifmgd->ht_capa_mask)); 8263 8264 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8265 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8266 sizeof(ifmgd->vht_capa_mask)); 8267 8268 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8269 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8270 sizeof(ifmgd->s1g_capa_mask)); 8271 8272 if (req->ie && req->ie_len) { 8273 memcpy(assoc_data->ie, req->ie, req->ie_len); 8274 assoc_data->ie_len = req->ie_len; 8275 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 8276 } else { 8277 assoc_data->ie_pos = assoc_data->ie; 8278 } 8279 8280 if (req->fils_kek) { 8281 /* should already be checked in cfg80211 - so warn */ 8282 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 8283 err = -EINVAL; 8284 goto err_free; 8285 } 8286 memcpy(assoc_data->fils_kek, req->fils_kek, 8287 req->fils_kek_len); 8288 assoc_data->fils_kek_len = req->fils_kek_len; 8289 } 8290 8291 if (req->fils_nonces) 8292 memcpy(assoc_data->fils_nonces, req->fils_nonces, 8293 2 * FILS_NONCE_LEN); 8294 8295 /* default timeout */ 8296 assoc_data->timeout = jiffies; 8297 assoc_data->timeout_started = true; 8298 8299 assoc_data->assoc_link_id = assoc_link_id; 8300 8301 if (req->ap_mld_addr) { 8302 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 8303 assoc_data->link[i].conn_flags = conn_flags; 8304 assoc_data->link[i].bss = req->links[i].bss; 8305 assoc_data->link[i].disabled = req->links[i].disabled; 8306 } 8307 8308 /* if there was no authentication, set up the link */ 8309 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 8310 if (err) 8311 goto err_clear; 8312 } else { 8313 assoc_data->link[0].conn_flags = conn_flags; 8314 assoc_data->link[0].bss = cbss; 8315 } 8316 8317 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 8318 if (WARN_ON(!link)) { 8319 err = -EINVAL; 8320 goto err_clear; 8321 } 8322 8323 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 8324 conn_flags |= link->u.mgd.conn_flags; 8325 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 8326 conn_flags, assoc_link_id); 8327 override = link->u.mgd.conn_flags != conn_flags; 8328 link->u.mgd.conn_flags |= conn_flags; 8329 8330 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 8331 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 8332 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 8333 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 8334 8335 if (bss->wmm_used && bss->uapsd_supported && 8336 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 8337 assoc_data->uapsd = true; 8338 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 8339 } else { 8340 assoc_data->uapsd = false; 8341 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 8342 } 8343 8344 if (req->prev_bssid) 8345 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 8346 8347 if (req->use_mfp) { 8348 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 8349 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 8350 } else { 8351 ifmgd->mfp = IEEE80211_MFP_DISABLED; 8352 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 8353 } 8354 8355 if (req->flags & ASSOC_REQ_USE_RRM) 8356 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 8357 else 8358 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 8359 8360 if (req->crypto.control_port) 8361 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 8362 else 8363 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 8364 8365 sdata->control_port_protocol = req->crypto.control_port_ethertype; 8366 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 8367 sdata->control_port_over_nl80211 = 8368 req->crypto.control_port_over_nl80211; 8369 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 8370 8371 /* kick off associate process */ 8372 ifmgd->assoc_data = assoc_data; 8373 8374 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 8375 if (!assoc_data->link[i].bss) 8376 continue; 8377 if (i == assoc_data->assoc_link_id) 8378 continue; 8379 /* only calculate the flags, hence link == NULL */ 8380 err = ieee80211_prep_channel(sdata, NULL, 8381 assoc_data->link[i].bss, true, 8382 &assoc_data->link[i].conn_flags); 8383 if (err) { 8384 req->links[i].error = err; 8385 goto err_clear; 8386 } 8387 } 8388 8389 /* needed for transmitting the assoc frames properly */ 8390 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 8391 8392 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 8393 req->ap_mld_addr, true, override); 8394 if (err) 8395 goto err_clear; 8396 8397 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 8398 link->u.mgd.conn_flags; 8399 8400 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 8401 const struct cfg80211_bss_ies *beacon_ies; 8402 8403 rcu_read_lock(); 8404 beacon_ies = rcu_dereference(req->bss->beacon_ies); 8405 8406 if (beacon_ies) { 8407 /* 8408 * Wait up to one beacon interval ... 8409 * should this be more if we miss one? 8410 */ 8411 sdata_info(sdata, "waiting for beacon from %pM\n", 8412 link->u.mgd.bssid); 8413 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 8414 assoc_data->timeout_started = true; 8415 assoc_data->need_beacon = true; 8416 } 8417 rcu_read_unlock(); 8418 } 8419 8420 run_again(sdata, assoc_data->timeout); 8421 8422 /* We are associating, clean up auth_data */ 8423 if (ifmgd->auth_data) 8424 ieee80211_destroy_auth_data(sdata, true); 8425 8426 return 0; 8427 err_clear: 8428 if (!ifmgd->auth_data) { 8429 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8430 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8431 BSS_CHANGED_BSSID); 8432 } 8433 ifmgd->assoc_data = NULL; 8434 err_free: 8435 kfree(assoc_data); 8436 return err; 8437 } 8438 8439 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 8440 struct cfg80211_deauth_request *req) 8441 { 8442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8443 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8444 bool tx = !req->local_state_change; 8445 struct ieee80211_prep_tx_info info = { 8446 .subtype = IEEE80211_STYPE_DEAUTH, 8447 }; 8448 8449 if (ifmgd->auth_data && 8450 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 8451 sdata_info(sdata, 8452 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 8453 req->bssid, req->reason_code, 8454 ieee80211_get_reason_code_string(req->reason_code)); 8455 8456 info.link_id = ifmgd->auth_data->link_id; 8457 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8458 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8459 IEEE80211_STYPE_DEAUTH, 8460 req->reason_code, tx, 8461 frame_buf); 8462 ieee80211_destroy_auth_data(sdata, false); 8463 ieee80211_report_disconnect(sdata, frame_buf, 8464 sizeof(frame_buf), true, 8465 req->reason_code, false); 8466 drv_mgd_complete_tx(sdata->local, sdata, &info); 8467 return 0; 8468 } 8469 8470 if (ifmgd->assoc_data && 8471 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 8472 sdata_info(sdata, 8473 "aborting association with %pM by local choice (Reason: %u=%s)\n", 8474 req->bssid, req->reason_code, 8475 ieee80211_get_reason_code_string(req->reason_code)); 8476 8477 info.link_id = ifmgd->assoc_data->assoc_link_id; 8478 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8479 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8480 IEEE80211_STYPE_DEAUTH, 8481 req->reason_code, tx, 8482 frame_buf); 8483 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8484 ieee80211_report_disconnect(sdata, frame_buf, 8485 sizeof(frame_buf), true, 8486 req->reason_code, false); 8487 return 0; 8488 } 8489 8490 if (ifmgd->associated && 8491 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 8492 sdata_info(sdata, 8493 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 8494 req->bssid, req->reason_code, 8495 ieee80211_get_reason_code_string(req->reason_code)); 8496 8497 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8498 req->reason_code, tx, frame_buf); 8499 ieee80211_report_disconnect(sdata, frame_buf, 8500 sizeof(frame_buf), true, 8501 req->reason_code, false); 8502 drv_mgd_complete_tx(sdata->local, sdata, &info); 8503 return 0; 8504 } 8505 8506 return -ENOTCONN; 8507 } 8508 8509 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 8510 struct cfg80211_disassoc_request *req) 8511 { 8512 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8513 8514 if (!sdata->u.mgd.associated || 8515 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 8516 return -ENOTCONN; 8517 8518 sdata_info(sdata, 8519 "disassociating from %pM by local choice (Reason: %u=%s)\n", 8520 req->ap_addr, req->reason_code, 8521 ieee80211_get_reason_code_string(req->reason_code)); 8522 8523 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 8524 req->reason_code, !req->local_state_change, 8525 frame_buf); 8526 8527 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8528 req->reason_code, false); 8529 8530 return 0; 8531 } 8532 8533 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 8534 { 8535 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8536 &link->u.mgd.request_smps_work); 8537 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8538 &link->u.mgd.recalc_smps); 8539 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 8540 &link->u.mgd.chswitch_work); 8541 } 8542 8543 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 8544 { 8545 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8546 8547 /* 8548 * Make sure some work items will not run after this, 8549 * they will not do anything but might not have been 8550 * cancelled when disconnecting. 8551 */ 8552 wiphy_work_cancel(sdata->local->hw.wiphy, 8553 &ifmgd->monitor_work); 8554 wiphy_work_cancel(sdata->local->hw.wiphy, 8555 &ifmgd->beacon_connection_loss_work); 8556 wiphy_work_cancel(sdata->local->hw.wiphy, 8557 &ifmgd->csa_connection_drop_work); 8558 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8559 &ifmgd->tdls_peer_del_work); 8560 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8561 &ifmgd->ml_reconf_work); 8562 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 8563 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8564 &ifmgd->neg_ttlm_timeout_work); 8565 8566 if (ifmgd->assoc_data) 8567 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8568 if (ifmgd->auth_data) 8569 ieee80211_destroy_auth_data(sdata, false); 8570 spin_lock_bh(&ifmgd->teardown_lock); 8571 if (ifmgd->teardown_skb) { 8572 kfree_skb(ifmgd->teardown_skb); 8573 ifmgd->teardown_skb = NULL; 8574 ifmgd->orig_teardown_skb = NULL; 8575 } 8576 kfree(ifmgd->assoc_req_ies); 8577 ifmgd->assoc_req_ies = NULL; 8578 ifmgd->assoc_req_ies_len = 0; 8579 spin_unlock_bh(&ifmgd->teardown_lock); 8580 del_timer_sync(&ifmgd->timer); 8581 } 8582 8583 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 8584 enum nl80211_cqm_rssi_threshold_event rssi_event, 8585 s32 rssi_level, 8586 gfp_t gfp) 8587 { 8588 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8589 8590 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 8591 8592 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 8593 } 8594 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 8595 8596 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 8597 { 8598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8599 8600 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 8601 8602 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 8603 } 8604 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 8605 8606 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 8607 int rssi_min_thold, 8608 int rssi_max_thold) 8609 { 8610 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 8611 8612 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 8613 return; 8614 8615 /* 8616 * Scale up threshold values before storing it, as the RSSI averaging 8617 * algorithm uses a scaled up value as well. Change this scaling 8618 * factor if the RSSI averaging algorithm changes. 8619 */ 8620 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 8621 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 8622 } 8623 8624 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 8625 int rssi_min_thold, 8626 int rssi_max_thold) 8627 { 8628 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8629 8630 WARN_ON(rssi_min_thold == rssi_max_thold || 8631 rssi_min_thold > rssi_max_thold); 8632 8633 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 8634 rssi_max_thold); 8635 } 8636 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 8637 8638 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 8639 { 8640 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8641 8642 _ieee80211_enable_rssi_reports(sdata, 0, 0); 8643 } 8644 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 8645