1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2023 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * Extract from the given disabled subchannel bitmap (raw format 93 * from the EHT Operation Element) the bits for the subchannel 94 * we're using right now. 95 */ 96 static u16 97 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, 98 struct cfg80211_chan_def *chandef, u16 bitmap) 99 { 100 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 101 struct cfg80211_chan_def ap_chandef = *chandef; 102 u32 ap_center_freq, local_center_freq; 103 u32 ap_bw, local_bw; 104 int ap_start_freq, local_start_freq; 105 u16 shift, mask; 106 107 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || 108 !(eht_oper->params & 109 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) 110 return 0; 111 112 /* set 160/320 supported to get the full AP definition */ 113 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 114 true, true, &ap_chandef); 115 ap_center_freq = ap_chandef.center_freq1; 116 ap_bw = 20 * BIT(u8_get_bits(info->control, 117 IEEE80211_EHT_OPER_CHAN_WIDTH)); 118 ap_start_freq = ap_center_freq - ap_bw / 2; 119 local_center_freq = chandef->center_freq1; 120 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 121 local_start_freq = local_center_freq - local_bw / 2; 122 shift = (local_start_freq - ap_start_freq) / 20; 123 mask = BIT(local_bw / 20) - 1; 124 125 return (bitmap >> shift) & mask; 126 } 127 128 /* 129 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 130 * valid bitmap. 131 */ 132 static void 133 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 134 const struct ieee80211_eht_operation *eht_oper, 135 u16 bitmap, u64 *changed) 136 { 137 struct cfg80211_chan_def *chandef = &link->conf->chandef; 138 u16 extracted; 139 u64 _changed = 0; 140 141 if (!changed) 142 changed = &_changed; 143 144 while (chandef->width > NL80211_CHAN_WIDTH_40) { 145 extracted = 146 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 147 bitmap); 148 149 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 150 chandef)) 151 break; 152 link->u.mgd.conn_flags |= 153 ieee80211_chandef_downgrade(chandef); 154 *changed |= BSS_CHANGED_BANDWIDTH; 155 } 156 157 if (chandef->width <= NL80211_CHAN_WIDTH_40) 158 extracted = 0; 159 160 if (link->conf->eht_puncturing != extracted) { 161 link->conf->eht_puncturing = extracted; 162 *changed |= BSS_CHANGED_EHT_PUNCTURING; 163 } 164 } 165 166 /* 167 * We can have multiple work items (and connection probing) 168 * scheduling this timer, but we need to take care to only 169 * reschedule it when it should fire _earlier_ than it was 170 * asked for before, or if it's not pending right now. This 171 * function ensures that. Note that it then is required to 172 * run this function for all timeouts after the first one 173 * has happened -- the work that runs from this timer will 174 * do that. 175 */ 176 static void run_again(struct ieee80211_sub_if_data *sdata, 177 unsigned long timeout) 178 { 179 lockdep_assert_wiphy(sdata->local->hw.wiphy); 180 181 if (!timer_pending(&sdata->u.mgd.timer) || 182 time_before(timeout, sdata->u.mgd.timer.expires)) 183 mod_timer(&sdata->u.mgd.timer, timeout); 184 } 185 186 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 187 { 188 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 189 return; 190 191 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 192 return; 193 194 mod_timer(&sdata->u.mgd.bcn_mon_timer, 195 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 196 } 197 198 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 199 { 200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 201 202 if (unlikely(!ifmgd->associated)) 203 return; 204 205 if (ifmgd->probe_send_count) 206 ifmgd->probe_send_count = 0; 207 208 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 209 return; 210 211 mod_timer(&ifmgd->conn_mon_timer, 212 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 213 } 214 215 static int ecw2cw(int ecw) 216 { 217 return (1 << ecw) - 1; 218 } 219 220 static ieee80211_conn_flags_t 221 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 222 struct ieee80211_link_data *link, 223 ieee80211_conn_flags_t conn_flags, 224 struct ieee80211_supported_band *sband, 225 struct ieee80211_channel *channel, 226 u32 vht_cap_info, 227 const struct ieee80211_ht_operation *ht_oper, 228 const struct ieee80211_vht_operation *vht_oper, 229 const struct ieee80211_he_operation *he_oper, 230 const struct ieee80211_eht_operation *eht_oper, 231 const struct ieee80211_s1g_oper_ie *s1g_oper, 232 struct cfg80211_chan_def *chandef, bool tracking) 233 { 234 struct cfg80211_chan_def vht_chandef; 235 struct ieee80211_sta_ht_cap sta_ht_cap; 236 ieee80211_conn_flags_t ret; 237 u32 ht_cfreq; 238 239 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 240 chandef->chan = channel; 241 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 242 chandef->center_freq1 = channel->center_freq; 243 chandef->freq1_offset = channel->freq_offset; 244 245 if (channel->band == NL80211_BAND_6GHZ) { 246 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 247 chandef)) { 248 mlme_dbg(sdata, 249 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 250 ret = IEEE80211_CONN_DISABLE_HT | 251 IEEE80211_CONN_DISABLE_VHT | 252 IEEE80211_CONN_DISABLE_HE | 253 IEEE80211_CONN_DISABLE_EHT; 254 } else { 255 ret = 0; 256 } 257 vht_chandef = *chandef; 258 goto out; 259 } else if (sband->band == NL80211_BAND_S1GHZ) { 260 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 261 sdata_info(sdata, 262 "Missing S1G Operation Element? Trying operating == primary\n"); 263 chandef->width = ieee80211_s1g_channel_width(channel); 264 } 265 266 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 267 IEEE80211_CONN_DISABLE_VHT | 268 IEEE80211_CONN_DISABLE_80P80MHZ | 269 IEEE80211_CONN_DISABLE_160MHZ; 270 goto out; 271 } 272 273 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 274 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 275 276 if (!ht_oper || !sta_ht_cap.ht_supported) { 277 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 278 ret = IEEE80211_CONN_DISABLE_HT | 279 IEEE80211_CONN_DISABLE_VHT | 280 IEEE80211_CONN_DISABLE_HE | 281 IEEE80211_CONN_DISABLE_EHT; 282 goto out; 283 } 284 285 chandef->width = NL80211_CHAN_WIDTH_20; 286 287 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 288 channel->band); 289 /* check that channel matches the right operating channel */ 290 if (!tracking && channel->center_freq != ht_cfreq) { 291 /* 292 * It's possible that some APs are confused here; 293 * Netgear WNDR3700 sometimes reports 4 higher than 294 * the actual channel in association responses, but 295 * since we look at probe response/beacon data here 296 * it should be OK. 297 */ 298 sdata_info(sdata, 299 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 300 channel->center_freq, ht_cfreq, 301 ht_oper->primary_chan, channel->band); 302 ret = IEEE80211_CONN_DISABLE_HT | 303 IEEE80211_CONN_DISABLE_VHT | 304 IEEE80211_CONN_DISABLE_HE | 305 IEEE80211_CONN_DISABLE_EHT; 306 goto out; 307 } 308 309 /* check 40 MHz support, if we have it */ 310 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 311 ieee80211_chandef_ht_oper(ht_oper, chandef); 312 } else { 313 mlme_dbg(sdata, "40 MHz not supported\n"); 314 /* 40 MHz (and 80 MHz) must be supported for VHT */ 315 ret = IEEE80211_CONN_DISABLE_VHT; 316 /* also mark 40 MHz disabled */ 317 ret |= IEEE80211_CONN_DISABLE_40MHZ; 318 goto out; 319 } 320 321 if (!vht_oper || !sband->vht_cap.vht_supported) { 322 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 323 ret = IEEE80211_CONN_DISABLE_VHT; 324 goto out; 325 } 326 327 vht_chandef = *chandef; 328 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 329 he_oper && 330 (le32_to_cpu(he_oper->he_oper_params) & 331 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 332 struct ieee80211_vht_operation he_oper_vht_cap; 333 334 /* 335 * Set only first 3 bytes (other 2 aren't used in 336 * ieee80211_chandef_vht_oper() anyway) 337 */ 338 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 339 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 340 341 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 342 &he_oper_vht_cap, ht_oper, 343 &vht_chandef)) { 344 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 345 sdata_info(sdata, 346 "HE AP VHT information is invalid, disabling HE\n"); 347 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 348 goto out; 349 } 350 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 351 vht_cap_info, 352 vht_oper, ht_oper, 353 &vht_chandef)) { 354 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 355 sdata_info(sdata, 356 "AP VHT information is invalid, disabling VHT\n"); 357 ret = IEEE80211_CONN_DISABLE_VHT; 358 goto out; 359 } 360 361 if (!cfg80211_chandef_valid(&vht_chandef)) { 362 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 363 sdata_info(sdata, 364 "AP VHT information is invalid, disabling VHT\n"); 365 ret = IEEE80211_CONN_DISABLE_VHT; 366 goto out; 367 } 368 369 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 370 ret = 0; 371 goto out; 372 } 373 374 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 375 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 376 sdata_info(sdata, 377 "AP VHT information doesn't match HT, disabling VHT\n"); 378 ret = IEEE80211_CONN_DISABLE_VHT; 379 goto out; 380 } 381 382 *chandef = vht_chandef; 383 384 /* 385 * handle the case that the EHT operation indicates that it holds EHT 386 * operation information (in case that the channel width differs from 387 * the channel width reported in HT/VHT/HE). 388 */ 389 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 390 struct cfg80211_chan_def eht_chandef = *chandef; 391 392 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 393 eht_chandef.width == 394 NL80211_CHAN_WIDTH_160, 395 false, &eht_chandef); 396 397 if (!cfg80211_chandef_valid(&eht_chandef)) { 398 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 399 sdata_info(sdata, 400 "AP EHT information is invalid, disabling EHT\n"); 401 ret = IEEE80211_CONN_DISABLE_EHT; 402 goto out; 403 } 404 405 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 406 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 407 sdata_info(sdata, 408 "AP EHT information is incompatible, disabling EHT\n"); 409 ret = IEEE80211_CONN_DISABLE_EHT; 410 goto out; 411 } 412 413 *chandef = eht_chandef; 414 } 415 416 ret = 0; 417 418 out: 419 /* 420 * When tracking the current AP, don't do any further checks if the 421 * new chandef is identical to the one we're currently using for the 422 * connection. This keeps us from playing ping-pong with regulatory, 423 * without it the following can happen (for example): 424 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 425 * - AP advertises regdom US 426 * - CRDA loads regdom US with 80 MHz prohibited (old database) 427 * - the code below detects an unsupported channel, downgrades, and 428 * we disconnect from the AP in the caller 429 * - disconnect causes CRDA to reload world regdomain and the game 430 * starts anew. 431 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 432 * 433 * It seems possible that there are still scenarios with CSA or real 434 * bandwidth changes where a this could happen, but those cases are 435 * less common and wouldn't completely prevent using the AP. 436 */ 437 if (tracking && 438 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 439 return ret; 440 441 /* don't print the message below for VHT mismatch if VHT is disabled */ 442 if (ret & IEEE80211_CONN_DISABLE_VHT) 443 vht_chandef = *chandef; 444 445 /* 446 * Ignore the DISABLED flag when we're already connected and only 447 * tracking the APs beacon for bandwidth changes - otherwise we 448 * might get disconnected here if we connect to an AP, update our 449 * regulatory information based on the AP's country IE and the 450 * information we have is wrong/outdated and disables the channel 451 * that we're actually using for the connection to the AP. 452 */ 453 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 454 tracking ? 0 : 455 IEEE80211_CHAN_DISABLED)) { 456 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 457 ret = IEEE80211_CONN_DISABLE_HT | 458 IEEE80211_CONN_DISABLE_VHT | 459 IEEE80211_CONN_DISABLE_HE | 460 IEEE80211_CONN_DISABLE_EHT; 461 break; 462 } 463 464 ret |= ieee80211_chandef_downgrade(chandef); 465 } 466 467 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 468 IEEE80211_CHAN_NO_HE)) 469 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 470 471 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 472 IEEE80211_CHAN_NO_EHT)) 473 ret |= IEEE80211_CONN_DISABLE_EHT; 474 475 if (chandef->width != vht_chandef.width && !tracking) 476 sdata_info(sdata, 477 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 478 479 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 480 return ret; 481 } 482 483 static int ieee80211_config_bw(struct ieee80211_link_data *link, 484 const struct ieee80211_ht_cap *ht_cap, 485 const struct ieee80211_vht_cap *vht_cap, 486 const struct ieee80211_ht_operation *ht_oper, 487 const struct ieee80211_vht_operation *vht_oper, 488 const struct ieee80211_he_operation *he_oper, 489 const struct ieee80211_eht_operation *eht_oper, 490 const struct ieee80211_s1g_oper_ie *s1g_oper, 491 const u8 *bssid, u64 *changed) 492 { 493 struct ieee80211_sub_if_data *sdata = link->sdata; 494 struct ieee80211_local *local = sdata->local; 495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 496 struct ieee80211_channel *chan = link->conf->chandef.chan; 497 struct ieee80211_supported_band *sband = 498 local->hw.wiphy->bands[chan->band]; 499 struct cfg80211_chan_def chandef; 500 u16 ht_opmode; 501 ieee80211_conn_flags_t flags; 502 u32 vht_cap_info = 0; 503 int ret; 504 505 /* if HT was/is disabled, don't track any bandwidth changes */ 506 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 507 return 0; 508 509 /* don't check VHT if we associated as non-VHT station */ 510 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 511 vht_oper = NULL; 512 513 /* don't check HE if we associated as non-HE station */ 514 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 515 !ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 516 he_oper = NULL; 517 eht_oper = NULL; 518 } 519 520 /* don't check EHT if we associated as non-EHT station */ 521 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 522 !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) 523 eht_oper = NULL; 524 525 /* 526 * if bss configuration changed store the new one - 527 * this may be applicable even if channel is identical 528 */ 529 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 530 if (link->conf->ht_operation_mode != ht_opmode) { 531 *changed |= BSS_CHANGED_HT; 532 link->conf->ht_operation_mode = ht_opmode; 533 } 534 535 if (vht_cap) 536 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 537 538 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 539 flags = ieee80211_determine_chantype(sdata, link, 540 link->u.mgd.conn_flags, 541 sband, chan, vht_cap_info, 542 ht_oper, vht_oper, 543 he_oper, eht_oper, 544 s1g_oper, &chandef, true); 545 546 /* 547 * Downgrade the new channel if we associated with restricted 548 * capabilities. For example, if we associated as a 20 MHz STA 549 * to a 40 MHz AP (due to regulatory, capabilities or config 550 * reasons) then switching to a 40 MHz channel now won't do us 551 * any good -- we couldn't use it with the AP. 552 */ 553 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 554 chandef.width == NL80211_CHAN_WIDTH_80P80) 555 flags |= ieee80211_chandef_downgrade(&chandef); 556 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 557 chandef.width == NL80211_CHAN_WIDTH_160) 558 flags |= ieee80211_chandef_downgrade(&chandef); 559 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 560 chandef.width > NL80211_CHAN_WIDTH_20) 561 flags |= ieee80211_chandef_downgrade(&chandef); 562 563 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 564 return 0; 565 566 link_info(link, 567 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 568 link->u.mgd.bssid, chandef.chan->center_freq, 569 chandef.chan->freq_offset, chandef.width, 570 chandef.center_freq1, chandef.freq1_offset, 571 chandef.center_freq2); 572 573 if (flags != (link->u.mgd.conn_flags & 574 (IEEE80211_CONN_DISABLE_HT | 575 IEEE80211_CONN_DISABLE_VHT | 576 IEEE80211_CONN_DISABLE_HE | 577 IEEE80211_CONN_DISABLE_EHT | 578 IEEE80211_CONN_DISABLE_40MHZ | 579 IEEE80211_CONN_DISABLE_80P80MHZ | 580 IEEE80211_CONN_DISABLE_160MHZ | 581 IEEE80211_CONN_DISABLE_320MHZ)) || 582 !cfg80211_chandef_valid(&chandef)) { 583 sdata_info(sdata, 584 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 585 link->u.mgd.bssid, flags, ifmgd->flags); 586 return -EINVAL; 587 } 588 589 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 590 591 if (ret) { 592 sdata_info(sdata, 593 "AP %pM changed bandwidth to incompatible one - disconnect\n", 594 link->u.mgd.bssid); 595 return ret; 596 } 597 598 return 0; 599 } 600 601 /* frame sending functions */ 602 603 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 604 struct sk_buff *skb, u8 ap_ht_param, 605 struct ieee80211_supported_band *sband, 606 struct ieee80211_channel *channel, 607 enum ieee80211_smps_mode smps, 608 ieee80211_conn_flags_t conn_flags) 609 { 610 u8 *pos; 611 u32 flags = channel->flags; 612 u16 cap; 613 struct ieee80211_sta_ht_cap ht_cap; 614 615 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 616 617 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 618 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 619 620 /* determine capability flags */ 621 cap = ht_cap.cap; 622 623 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 624 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 625 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 626 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 627 cap &= ~IEEE80211_HT_CAP_SGI_40; 628 } 629 break; 630 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 631 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 632 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 633 cap &= ~IEEE80211_HT_CAP_SGI_40; 634 } 635 break; 636 } 637 638 /* 639 * If 40 MHz was disabled associate as though we weren't 640 * capable of 40 MHz -- some broken APs will never fall 641 * back to trying to transmit in 20 MHz. 642 */ 643 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 644 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 645 cap &= ~IEEE80211_HT_CAP_SGI_40; 646 } 647 648 /* set SM PS mode properly */ 649 cap &= ~IEEE80211_HT_CAP_SM_PS; 650 switch (smps) { 651 case IEEE80211_SMPS_AUTOMATIC: 652 case IEEE80211_SMPS_NUM_MODES: 653 WARN_ON(1); 654 fallthrough; 655 case IEEE80211_SMPS_OFF: 656 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 657 IEEE80211_HT_CAP_SM_PS_SHIFT; 658 break; 659 case IEEE80211_SMPS_STATIC: 660 cap |= WLAN_HT_CAP_SM_PS_STATIC << 661 IEEE80211_HT_CAP_SM_PS_SHIFT; 662 break; 663 case IEEE80211_SMPS_DYNAMIC: 664 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 665 IEEE80211_HT_CAP_SM_PS_SHIFT; 666 break; 667 } 668 669 /* reserve and fill IE */ 670 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 671 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 672 } 673 674 /* This function determines vht capability flags for the association 675 * and builds the IE. 676 * Note - the function returns true to own the MU-MIMO capability 677 */ 678 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 679 struct sk_buff *skb, 680 struct ieee80211_supported_band *sband, 681 struct ieee80211_vht_cap *ap_vht_cap, 682 ieee80211_conn_flags_t conn_flags) 683 { 684 struct ieee80211_local *local = sdata->local; 685 u8 *pos; 686 u32 cap; 687 struct ieee80211_sta_vht_cap vht_cap; 688 u32 mask, ap_bf_sts, our_bf_sts; 689 bool mu_mimo_owner = false; 690 691 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 692 693 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 694 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 695 696 /* determine capability flags */ 697 cap = vht_cap.cap; 698 699 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 700 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 701 702 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 703 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 704 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 705 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 706 } 707 708 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 709 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 710 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 711 } 712 713 /* 714 * Some APs apparently get confused if our capabilities are better 715 * than theirs, so restrict what we advertise in the assoc request. 716 */ 717 if (!(ap_vht_cap->vht_cap_info & 718 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 719 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 720 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 721 else if (!(ap_vht_cap->vht_cap_info & 722 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 723 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 724 725 /* 726 * If some other vif is using the MU-MIMO capability we cannot associate 727 * using MU-MIMO - this will lead to contradictions in the group-id 728 * mechanism. 729 * Ownership is defined since association request, in order to avoid 730 * simultaneous associations with MU-MIMO. 731 */ 732 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 733 bool disable_mu_mimo = false; 734 struct ieee80211_sub_if_data *other; 735 736 list_for_each_entry_rcu(other, &local->interfaces, list) { 737 if (other->vif.bss_conf.mu_mimo_owner) { 738 disable_mu_mimo = true; 739 break; 740 } 741 } 742 if (disable_mu_mimo) 743 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 744 else 745 mu_mimo_owner = true; 746 } 747 748 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 749 750 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 751 our_bf_sts = cap & mask; 752 753 if (ap_bf_sts < our_bf_sts) { 754 cap &= ~mask; 755 cap |= ap_bf_sts; 756 } 757 758 /* reserve and fill IE */ 759 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 760 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 761 762 return mu_mimo_owner; 763 } 764 765 /* This function determines HE capability flags for the association 766 * and builds the IE. 767 */ 768 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 769 struct sk_buff *skb, 770 struct ieee80211_supported_band *sband, 771 enum ieee80211_smps_mode smps_mode, 772 ieee80211_conn_flags_t conn_flags) 773 { 774 u8 *pos, *pre_he_pos; 775 const struct ieee80211_sta_he_cap *he_cap; 776 u8 he_cap_size; 777 778 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 779 if (WARN_ON(!he_cap)) 780 return; 781 782 /* get a max size estimate */ 783 he_cap_size = 784 2 + 1 + sizeof(he_cap->he_cap_elem) + 785 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 786 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 787 he_cap->he_cap_elem.phy_cap_info); 788 pos = skb_put(skb, he_cap_size); 789 pre_he_pos = pos; 790 pos = ieee80211_ie_build_he_cap(conn_flags, 791 pos, he_cap, pos + he_cap_size); 792 /* trim excess if any */ 793 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 794 795 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 796 } 797 798 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 799 struct sk_buff *skb, 800 struct ieee80211_supported_band *sband) 801 { 802 u8 *pos; 803 const struct ieee80211_sta_he_cap *he_cap; 804 const struct ieee80211_sta_eht_cap *eht_cap; 805 u8 eht_cap_size; 806 807 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 808 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 809 810 /* 811 * EHT capabilities element is only added if the HE capabilities element 812 * was added so assume that 'he_cap' is valid and don't check it. 813 */ 814 if (WARN_ON(!he_cap || !eht_cap)) 815 return; 816 817 eht_cap_size = 818 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 819 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 820 &eht_cap->eht_cap_elem, 821 false) + 822 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 823 eht_cap->eht_cap_elem.phy_cap_info); 824 pos = skb_put(skb, eht_cap_size); 825 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 826 false); 827 } 828 829 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 830 enum nl80211_chan_width width, 831 struct ieee80211_supported_band *sband, 832 struct ieee80211_mgd_assoc_data *assoc_data) 833 { 834 unsigned int rates_len, supp_rates_len; 835 u32 rates = 0; 836 int i, count; 837 u8 *pos; 838 839 if (assoc_data->supp_rates_len) { 840 /* 841 * Get all rates supported by the device and the AP as 842 * some APs don't like getting a superset of their rates 843 * in the association request (e.g. D-Link DAP 1353 in 844 * b-only mode)... 845 */ 846 rates_len = ieee80211_parse_bitrates(width, sband, 847 assoc_data->supp_rates, 848 assoc_data->supp_rates_len, 849 &rates); 850 } else { 851 /* 852 * In case AP not provide any supported rates information 853 * before association, we send information element(s) with 854 * all rates that we support. 855 */ 856 rates_len = sband->n_bitrates; 857 for (i = 0; i < sband->n_bitrates; i++) 858 rates |= BIT(i); 859 } 860 861 supp_rates_len = rates_len; 862 if (supp_rates_len > 8) 863 supp_rates_len = 8; 864 865 pos = skb_put(skb, supp_rates_len + 2); 866 *pos++ = WLAN_EID_SUPP_RATES; 867 *pos++ = supp_rates_len; 868 869 count = 0; 870 for (i = 0; i < sband->n_bitrates; i++) { 871 if (BIT(i) & rates) { 872 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 873 *pos++ = (u8)rate; 874 if (++count == 8) 875 break; 876 } 877 } 878 879 if (rates_len > count) { 880 pos = skb_put(skb, rates_len - count + 2); 881 *pos++ = WLAN_EID_EXT_SUPP_RATES; 882 *pos++ = rates_len - count; 883 884 for (i++; i < sband->n_bitrates; i++) { 885 if (BIT(i) & rates) { 886 int rate; 887 888 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 889 *pos++ = (u8)rate; 890 } 891 } 892 } 893 } 894 895 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 896 const u8 *elems, 897 size_t elems_len, 898 size_t offset) 899 { 900 size_t noffset; 901 902 static const u8 before_ht[] = { 903 WLAN_EID_SSID, 904 WLAN_EID_SUPP_RATES, 905 WLAN_EID_EXT_SUPP_RATES, 906 WLAN_EID_PWR_CAPABILITY, 907 WLAN_EID_SUPPORTED_CHANNELS, 908 WLAN_EID_RSN, 909 WLAN_EID_QOS_CAPA, 910 WLAN_EID_RRM_ENABLED_CAPABILITIES, 911 WLAN_EID_MOBILITY_DOMAIN, 912 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 913 WLAN_EID_RIC_DATA, /* reassoc only */ 914 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 915 }; 916 static const u8 after_ric[] = { 917 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 918 WLAN_EID_HT_CAPABILITY, 919 WLAN_EID_BSS_COEX_2040, 920 /* luckily this is almost always there */ 921 WLAN_EID_EXT_CAPABILITY, 922 WLAN_EID_QOS_TRAFFIC_CAPA, 923 WLAN_EID_TIM_BCAST_REQ, 924 WLAN_EID_INTERWORKING, 925 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 926 WLAN_EID_VHT_CAPABILITY, 927 WLAN_EID_OPMODE_NOTIF, 928 }; 929 930 if (!elems_len) 931 return offset; 932 933 noffset = ieee80211_ie_split_ric(elems, elems_len, 934 before_ht, 935 ARRAY_SIZE(before_ht), 936 after_ric, 937 ARRAY_SIZE(after_ric), 938 offset); 939 skb_put_data(skb, elems + offset, noffset - offset); 940 941 return noffset; 942 } 943 944 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 945 const u8 *elems, 946 size_t elems_len, 947 size_t offset) 948 { 949 static const u8 before_vht[] = { 950 /* 951 * no need to list the ones split off before HT 952 * or generated here 953 */ 954 WLAN_EID_BSS_COEX_2040, 955 WLAN_EID_EXT_CAPABILITY, 956 WLAN_EID_QOS_TRAFFIC_CAPA, 957 WLAN_EID_TIM_BCAST_REQ, 958 WLAN_EID_INTERWORKING, 959 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 960 }; 961 size_t noffset; 962 963 if (!elems_len) 964 return offset; 965 966 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 967 noffset = ieee80211_ie_split(elems, elems_len, 968 before_vht, ARRAY_SIZE(before_vht), 969 offset); 970 skb_put_data(skb, elems + offset, noffset - offset); 971 972 return noffset; 973 } 974 975 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 976 const u8 *elems, 977 size_t elems_len, 978 size_t offset) 979 { 980 static const u8 before_he[] = { 981 /* 982 * no need to list the ones split off before VHT 983 * or generated here 984 */ 985 WLAN_EID_OPMODE_NOTIF, 986 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 987 /* 11ai elements */ 988 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 989 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 990 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 991 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 992 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 993 /* TODO: add 11ah/11aj/11ak elements */ 994 }; 995 size_t noffset; 996 997 if (!elems_len) 998 return offset; 999 1000 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1001 noffset = ieee80211_ie_split(elems, elems_len, 1002 before_he, ARRAY_SIZE(before_he), 1003 offset); 1004 skb_put_data(skb, elems + offset, noffset - offset); 1005 1006 return noffset; 1007 } 1008 1009 #define PRESENT_ELEMS_MAX 8 1010 #define PRESENT_ELEM_EXT_OFFS 0x100 1011 1012 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1013 struct sk_buff *skb, u16 capab, 1014 const struct element *ext_capa, 1015 const u16 *present_elems); 1016 1017 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1018 struct sk_buff *skb, u16 *capab, 1019 const struct element *ext_capa, 1020 const u8 *extra_elems, 1021 size_t extra_elems_len, 1022 unsigned int link_id, 1023 struct ieee80211_link_data *link, 1024 u16 *present_elems) 1025 { 1026 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1028 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1029 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1030 struct ieee80211_channel *chan = cbss->channel; 1031 const struct ieee80211_sband_iftype_data *iftd; 1032 struct ieee80211_local *local = sdata->local; 1033 struct ieee80211_supported_band *sband; 1034 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1035 struct ieee80211_chanctx_conf *chanctx_conf; 1036 enum ieee80211_smps_mode smps_mode; 1037 u16 orig_capab = *capab; 1038 size_t offset = 0; 1039 int present_elems_len = 0; 1040 u8 *pos; 1041 int i; 1042 1043 #define ADD_PRESENT_ELEM(id) do { \ 1044 /* need a last for termination - we use 0 == SSID */ \ 1045 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1046 present_elems[present_elems_len++] = (id); \ 1047 } while (0) 1048 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1049 1050 if (link) 1051 smps_mode = link->smps_mode; 1052 else if (sdata->u.mgd.powersave) 1053 smps_mode = IEEE80211_SMPS_DYNAMIC; 1054 else 1055 smps_mode = IEEE80211_SMPS_OFF; 1056 1057 if (link) { 1058 /* 1059 * 5/10 MHz scenarios are only viable without MLO, in which 1060 * case this pointer should be used ... All of this is a bit 1061 * unclear though, not sure this even works at all. 1062 */ 1063 rcu_read_lock(); 1064 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1065 if (chanctx_conf) 1066 width = chanctx_conf->def.width; 1067 rcu_read_unlock(); 1068 } 1069 1070 sband = local->hw.wiphy->bands[chan->band]; 1071 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1072 1073 if (sband->band == NL80211_BAND_2GHZ) { 1074 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1075 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1076 } 1077 1078 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1079 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1080 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1081 1082 if (sband->band != NL80211_BAND_S1GHZ) 1083 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1084 1085 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1086 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1087 struct cfg80211_chan_def chandef = { 1088 .width = width, 1089 .chan = chan, 1090 }; 1091 1092 pos = skb_put(skb, 4); 1093 *pos++ = WLAN_EID_PWR_CAPABILITY; 1094 *pos++ = 2; 1095 *pos++ = 0; /* min tx power */ 1096 /* max tx power */ 1097 *pos++ = ieee80211_chandef_max_power(&chandef); 1098 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1099 } 1100 1101 /* 1102 * Per spec, we shouldn't include the list of channels if we advertise 1103 * support for extended channel switching, but we've always done that; 1104 * (for now?) apply this restriction only on the (new) 6 GHz band. 1105 */ 1106 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1107 (sband->band != NL80211_BAND_6GHZ || 1108 !ext_capa || ext_capa->datalen < 1 || 1109 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1110 /* TODO: get this in reg domain format */ 1111 pos = skb_put(skb, 2 * sband->n_channels + 2); 1112 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1113 *pos++ = 2 * sband->n_channels; 1114 for (i = 0; i < sband->n_channels; i++) { 1115 int cf = sband->channels[i].center_freq; 1116 1117 *pos++ = ieee80211_frequency_to_channel(cf); 1118 *pos++ = 1; /* one channel in the subband*/ 1119 } 1120 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1121 } 1122 1123 /* if present, add any custom IEs that go before HT */ 1124 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1125 extra_elems_len, 1126 offset); 1127 1128 if (sband->band != NL80211_BAND_6GHZ && 1129 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1130 ieee80211_add_ht_ie(sdata, skb, 1131 assoc_data->link[link_id].ap_ht_param, 1132 sband, chan, smps_mode, 1133 assoc_data->link[link_id].conn_flags); 1134 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1135 } 1136 1137 /* if present, add any custom IEs that go before VHT */ 1138 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1139 extra_elems_len, 1140 offset); 1141 1142 if (sband->band != NL80211_BAND_6GHZ && 1143 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1144 bool mu_mimo_owner = 1145 ieee80211_add_vht_ie(sdata, skb, sband, 1146 &assoc_data->link[link_id].ap_vht_cap, 1147 assoc_data->link[link_id].conn_flags); 1148 1149 if (link) 1150 link->conf->mu_mimo_owner = mu_mimo_owner; 1151 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1152 } 1153 1154 /* 1155 * If AP doesn't support HT, mark HE and EHT as disabled. 1156 * If on the 5GHz band, make sure it supports VHT. 1157 */ 1158 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1159 (sband->band == NL80211_BAND_5GHZ && 1160 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1161 assoc_data->link[link_id].conn_flags |= 1162 IEEE80211_CONN_DISABLE_HE | 1163 IEEE80211_CONN_DISABLE_EHT; 1164 1165 /* if present, add any custom IEs that go before HE */ 1166 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1167 extra_elems_len, 1168 offset); 1169 1170 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1171 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1172 assoc_data->link[link_id].conn_flags); 1173 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1174 } 1175 1176 /* 1177 * careful - need to know about all the present elems before 1178 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1179 * we're going to put it after the ML element 1180 */ 1181 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1182 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1183 1184 if (link_id == assoc_data->assoc_link_id) 1185 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1186 present_elems); 1187 1188 /* crash if somebody gets it wrong */ 1189 present_elems = NULL; 1190 1191 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1192 ieee80211_add_eht_ie(sdata, skb, sband); 1193 1194 if (sband->band == NL80211_BAND_S1GHZ) { 1195 ieee80211_add_aid_request_ie(sdata, skb); 1196 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1197 } 1198 1199 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1200 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1201 1202 if (link) 1203 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1204 1205 return offset; 1206 } 1207 1208 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1209 const u16 *outer, 1210 const u16 *inner) 1211 { 1212 unsigned int skb_len = skb->len; 1213 bool at_extension = false; 1214 bool added = false; 1215 int i, j; 1216 u8 *len, *list_len = NULL; 1217 1218 skb_put_u8(skb, WLAN_EID_EXTENSION); 1219 len = skb_put(skb, 1); 1220 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1221 1222 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1223 u16 elem = outer[i]; 1224 bool have_inner = false; 1225 1226 /* should at least be sorted in the sense of normal -> ext */ 1227 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1228 1229 /* switch to extension list */ 1230 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1231 at_extension = true; 1232 if (!list_len) 1233 skb_put_u8(skb, 0); 1234 list_len = NULL; 1235 } 1236 1237 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1238 if (elem == inner[j]) { 1239 have_inner = true; 1240 break; 1241 } 1242 } 1243 1244 if (have_inner) 1245 continue; 1246 1247 if (!list_len) { 1248 list_len = skb_put(skb, 1); 1249 *list_len = 0; 1250 } 1251 *list_len += 1; 1252 skb_put_u8(skb, (u8)elem); 1253 added = true; 1254 } 1255 1256 /* if we added a list but no extension list, make a zero-len one */ 1257 if (added && (!at_extension || !list_len)) 1258 skb_put_u8(skb, 0); 1259 1260 /* if nothing added remove extension element completely */ 1261 if (!added) 1262 skb_trim(skb, skb_len); 1263 else 1264 *len = skb->len - skb_len - 2; 1265 } 1266 1267 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1268 struct sk_buff *skb, u16 capab, 1269 const struct element *ext_capa, 1270 const u16 *outer_present_elems) 1271 { 1272 struct ieee80211_local *local = sdata->local; 1273 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1274 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1275 struct ieee80211_multi_link_elem *ml_elem; 1276 struct ieee80211_mle_basic_common_info *common; 1277 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1278 __le16 eml_capa = 0, mld_capa_ops = 0; 1279 unsigned int link_id; 1280 u8 *ml_elem_len; 1281 void *capab_pos; 1282 1283 if (!ieee80211_vif_is_mld(&sdata->vif)) 1284 return; 1285 1286 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1287 ieee80211_vif_type_p2p(&sdata->vif)); 1288 if (ift_ext_capa) { 1289 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1290 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1291 } 1292 1293 skb_put_u8(skb, WLAN_EID_EXTENSION); 1294 ml_elem_len = skb_put(skb, 1); 1295 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1296 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1297 ml_elem->control = 1298 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1299 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1300 common = skb_put(skb, sizeof(*common)); 1301 common->len = sizeof(*common) + 1302 2; /* MLD capa/ops */ 1303 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1304 1305 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1306 if (eml_capa & 1307 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1308 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1309 common->len += 2; /* EML capabilities */ 1310 ml_elem->control |= 1311 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1312 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1313 } 1314 /* need indication from userspace to support this */ 1315 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1316 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1317 1318 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1319 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1320 const u8 *extra_elems; 1321 size_t extra_elems_len; 1322 size_t extra_used; 1323 u8 *subelem_len = NULL; 1324 __le16 ctrl; 1325 1326 if (!assoc_data->link[link_id].bss || 1327 link_id == assoc_data->assoc_link_id) 1328 continue; 1329 1330 extra_elems = assoc_data->link[link_id].elems; 1331 extra_elems_len = assoc_data->link[link_id].elems_len; 1332 1333 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1334 subelem_len = skb_put(skb, 1); 1335 1336 ctrl = cpu_to_le16(link_id | 1337 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1338 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1339 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1340 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1341 skb_put_data(skb, assoc_data->link[link_id].addr, 1342 ETH_ALEN); 1343 /* 1344 * Now add the contents of the (re)association request, 1345 * but the "listen interval" and "current AP address" 1346 * (if applicable) are skipped. So we only have 1347 * the capability field (remember the position and fill 1348 * later), followed by the elements added below by 1349 * calling ieee80211_assoc_link_elems(). 1350 */ 1351 capab_pos = skb_put(skb, 2); 1352 1353 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1354 ext_capa, 1355 extra_elems, 1356 extra_elems_len, 1357 link_id, NULL, 1358 link_present_elems); 1359 if (extra_elems) 1360 skb_put_data(skb, extra_elems + extra_used, 1361 extra_elems_len - extra_used); 1362 1363 put_unaligned_le16(capab, capab_pos); 1364 1365 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1366 link_present_elems); 1367 1368 ieee80211_fragment_element(skb, subelem_len, 1369 IEEE80211_MLE_SUBELEM_FRAGMENT); 1370 } 1371 1372 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1373 } 1374 1375 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1376 { 1377 struct ieee80211_local *local = sdata->local; 1378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1379 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1380 struct ieee80211_link_data *link; 1381 struct sk_buff *skb; 1382 struct ieee80211_mgmt *mgmt; 1383 u8 *pos, qos_info, *ie_start; 1384 size_t offset, noffset; 1385 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1386 __le16 listen_int; 1387 struct element *ext_capa = NULL; 1388 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1389 struct ieee80211_prep_tx_info info = {}; 1390 unsigned int link_id, n_links = 0; 1391 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1392 void *capab_pos; 1393 size_t size; 1394 int ret; 1395 1396 /* we know it's writable, cast away the const */ 1397 if (assoc_data->ie_len) 1398 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1399 assoc_data->ie, 1400 assoc_data->ie_len); 1401 1402 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1403 1404 size = local->hw.extra_tx_headroom + 1405 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1406 2 + assoc_data->ssid_len + /* SSID */ 1407 assoc_data->ie_len + /* extra IEs */ 1408 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1409 9; /* WMM */ 1410 1411 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1412 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1413 const struct ieee80211_sband_iftype_data *iftd; 1414 struct ieee80211_supported_band *sband; 1415 1416 if (!cbss) 1417 continue; 1418 1419 sband = local->hw.wiphy->bands[cbss->channel->band]; 1420 1421 n_links++; 1422 /* add STA profile elements length */ 1423 size += assoc_data->link[link_id].elems_len; 1424 /* and supported rates length */ 1425 size += 4 + sband->n_bitrates; 1426 /* supported channels */ 1427 size += 2 + 2 * sband->n_channels; 1428 1429 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1430 if (iftd) 1431 size += iftd->vendor_elems.len; 1432 1433 /* power capability */ 1434 size += 4; 1435 1436 /* HT, VHT, HE, EHT */ 1437 size += 2 + sizeof(struct ieee80211_ht_cap); 1438 size += 2 + sizeof(struct ieee80211_vht_cap); 1439 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1440 sizeof(struct ieee80211_he_mcs_nss_supp) + 1441 IEEE80211_HE_PPE_THRES_MAX_LEN; 1442 1443 if (sband->band == NL80211_BAND_6GHZ) 1444 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1445 1446 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1447 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1448 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1449 1450 /* non-inheritance element */ 1451 size += 2 + 2 + PRESENT_ELEMS_MAX; 1452 1453 /* should be the same across all BSSes */ 1454 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1455 capab |= WLAN_CAPABILITY_PRIVACY; 1456 } 1457 1458 if (ieee80211_vif_is_mld(&sdata->vif)) { 1459 /* consider the multi-link element with STA profile */ 1460 size += sizeof(struct ieee80211_multi_link_elem); 1461 /* max common info field in basic multi-link element */ 1462 size += sizeof(struct ieee80211_mle_basic_common_info) + 1463 2 + /* capa & op */ 1464 2; /* EML capa */ 1465 1466 /* 1467 * The capability elements were already considered above; 1468 * note this over-estimates a bit because there's no 1469 * STA profile for the assoc link. 1470 */ 1471 size += (n_links - 1) * 1472 (1 + 1 + /* subelement ID/length */ 1473 2 + /* STA control */ 1474 1 + ETH_ALEN + 2 /* STA Info field */); 1475 } 1476 1477 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1478 if (WARN_ON(!link)) 1479 return -EINVAL; 1480 1481 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1482 return -EINVAL; 1483 1484 skb = alloc_skb(size, GFP_KERNEL); 1485 if (!skb) 1486 return -ENOMEM; 1487 1488 skb_reserve(skb, local->hw.extra_tx_headroom); 1489 1490 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1491 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1492 1493 /* Set MBSSID support for HE AP if needed */ 1494 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1495 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1496 ext_capa && ext_capa->datalen >= 3) 1497 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1498 1499 mgmt = skb_put_zero(skb, 24); 1500 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1501 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1502 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1503 1504 listen_int = cpu_to_le16(assoc_data->s1g ? 1505 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1506 local->hw.conf.listen_interval); 1507 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1508 skb_put(skb, 10); 1509 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1510 IEEE80211_STYPE_REASSOC_REQ); 1511 capab_pos = &mgmt->u.reassoc_req.capab_info; 1512 mgmt->u.reassoc_req.listen_interval = listen_int; 1513 memcpy(mgmt->u.reassoc_req.current_ap, 1514 assoc_data->prev_ap_addr, ETH_ALEN); 1515 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1516 } else { 1517 skb_put(skb, 4); 1518 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1519 IEEE80211_STYPE_ASSOC_REQ); 1520 capab_pos = &mgmt->u.assoc_req.capab_info; 1521 mgmt->u.assoc_req.listen_interval = listen_int; 1522 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1523 } 1524 1525 /* SSID */ 1526 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1527 ie_start = pos; 1528 *pos++ = WLAN_EID_SSID; 1529 *pos++ = assoc_data->ssid_len; 1530 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1531 1532 /* add the elements for the assoc (main) link */ 1533 link_capab = capab; 1534 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1535 ext_capa, 1536 assoc_data->ie, 1537 assoc_data->ie_len, 1538 assoc_data->assoc_link_id, link, 1539 present_elems); 1540 put_unaligned_le16(link_capab, capab_pos); 1541 1542 /* if present, add any custom non-vendor IEs */ 1543 if (assoc_data->ie_len) { 1544 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1545 assoc_data->ie_len, 1546 offset); 1547 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1548 offset = noffset; 1549 } 1550 1551 if (assoc_data->wmm) { 1552 if (assoc_data->uapsd) { 1553 qos_info = ifmgd->uapsd_queues; 1554 qos_info |= (ifmgd->uapsd_max_sp_len << 1555 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1556 } else { 1557 qos_info = 0; 1558 } 1559 1560 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1561 } 1562 1563 /* add any remaining custom (i.e. vendor specific here) IEs */ 1564 if (assoc_data->ie_len) { 1565 noffset = assoc_data->ie_len; 1566 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1567 } 1568 1569 if (assoc_data->fils_kek_len) { 1570 ret = fils_encrypt_assoc_req(skb, assoc_data); 1571 if (ret < 0) { 1572 dev_kfree_skb(skb); 1573 return ret; 1574 } 1575 } 1576 1577 pos = skb_tail_pointer(skb); 1578 kfree(ifmgd->assoc_req_ies); 1579 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1580 if (!ifmgd->assoc_req_ies) { 1581 dev_kfree_skb(skb); 1582 return -ENOMEM; 1583 } 1584 1585 ifmgd->assoc_req_ies_len = pos - ie_start; 1586 1587 info.link_id = assoc_data->assoc_link_id; 1588 drv_mgd_prepare_tx(local, sdata, &info); 1589 1590 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1591 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1592 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1593 IEEE80211_TX_INTFL_MLME_CONN_TX; 1594 ieee80211_tx_skb(sdata, skb); 1595 1596 return 0; 1597 } 1598 1599 void ieee80211_send_pspoll(struct ieee80211_local *local, 1600 struct ieee80211_sub_if_data *sdata) 1601 { 1602 struct ieee80211_pspoll *pspoll; 1603 struct sk_buff *skb; 1604 1605 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1606 if (!skb) 1607 return; 1608 1609 pspoll = (struct ieee80211_pspoll *) skb->data; 1610 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1611 1612 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1613 ieee80211_tx_skb(sdata, skb); 1614 } 1615 1616 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1617 struct ieee80211_sub_if_data *sdata, 1618 bool powersave) 1619 { 1620 struct sk_buff *skb; 1621 struct ieee80211_hdr_3addr *nullfunc; 1622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1623 1624 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1625 !ieee80211_hw_check(&local->hw, 1626 DOESNT_SUPPORT_QOS_NDP)); 1627 if (!skb) 1628 return; 1629 1630 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1631 if (powersave) 1632 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1633 1634 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1635 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1636 1637 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1638 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1639 1640 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1641 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1642 1643 ieee80211_tx_skb(sdata, skb); 1644 } 1645 1646 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1647 struct ieee80211_sub_if_data *sdata) 1648 { 1649 struct sk_buff *skb; 1650 struct ieee80211_hdr *nullfunc; 1651 __le16 fc; 1652 1653 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1654 return; 1655 1656 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1657 if (!skb) 1658 return; 1659 1660 skb_reserve(skb, local->hw.extra_tx_headroom); 1661 1662 nullfunc = skb_put_zero(skb, 30); 1663 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1664 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1665 nullfunc->frame_control = fc; 1666 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1667 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1668 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1669 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1670 1671 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1672 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1673 ieee80211_tx_skb(sdata, skb); 1674 } 1675 1676 /* spectrum management related things */ 1677 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1678 struct wiphy_work *work) 1679 { 1680 struct ieee80211_link_data *link = 1681 container_of(work, struct ieee80211_link_data, 1682 u.mgd.chswitch_work.work); 1683 struct ieee80211_sub_if_data *sdata = link->sdata; 1684 struct ieee80211_local *local = sdata->local; 1685 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1686 int ret; 1687 1688 if (!ieee80211_sdata_running(sdata)) 1689 return; 1690 1691 lockdep_assert_wiphy(local->hw.wiphy); 1692 1693 if (!ifmgd->associated) 1694 return; 1695 1696 if (!link->conf->csa_active) 1697 return; 1698 1699 /* 1700 * using reservation isn't immediate as it may be deferred until later 1701 * with multi-vif. once reservation is complete it will re-schedule the 1702 * work with no reserved_chanctx so verify chandef to check if it 1703 * completed successfully 1704 */ 1705 1706 if (link->reserved_chanctx) { 1707 /* 1708 * with multi-vif csa driver may call ieee80211_csa_finish() 1709 * many times while waiting for other interfaces to use their 1710 * reservations 1711 */ 1712 if (link->reserved_ready) 1713 return; 1714 1715 ret = ieee80211_link_use_reserved_context(link); 1716 if (ret) { 1717 sdata_info(sdata, 1718 "failed to use reserved channel context, disconnecting (err=%d)\n", 1719 ret); 1720 wiphy_work_queue(sdata->local->hw.wiphy, 1721 &ifmgd->csa_connection_drop_work); 1722 } 1723 return; 1724 } 1725 1726 if (!cfg80211_chandef_identical(&link->conf->chandef, 1727 &link->csa_chandef)) { 1728 sdata_info(sdata, 1729 "failed to finalize channel switch, disconnecting\n"); 1730 wiphy_work_queue(sdata->local->hw.wiphy, 1731 &ifmgd->csa_connection_drop_work); 1732 return; 1733 } 1734 1735 link->u.mgd.csa_waiting_bcn = true; 1736 1737 ieee80211_sta_reset_beacon_monitor(sdata); 1738 ieee80211_sta_reset_conn_monitor(sdata); 1739 } 1740 1741 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1742 { 1743 struct ieee80211_sub_if_data *sdata = link->sdata; 1744 struct ieee80211_local *local = sdata->local; 1745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1746 int ret; 1747 1748 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1749 1750 WARN_ON(!link->conf->csa_active); 1751 1752 if (link->csa_block_tx) { 1753 ieee80211_wake_vif_queues(local, sdata, 1754 IEEE80211_QUEUE_STOP_REASON_CSA); 1755 link->csa_block_tx = false; 1756 } 1757 1758 link->conf->csa_active = false; 1759 link->u.mgd.csa_waiting_bcn = false; 1760 /* 1761 * If the CSA IE is still present on the beacon after the switch, 1762 * we need to consider it as a new CSA (possibly to self). 1763 */ 1764 link->u.mgd.beacon_crc_valid = false; 1765 1766 ret = drv_post_channel_switch(link); 1767 if (ret) { 1768 sdata_info(sdata, 1769 "driver post channel switch failed, disconnecting\n"); 1770 wiphy_work_queue(sdata->local->hw.wiphy, 1771 &ifmgd->csa_connection_drop_work); 1772 return; 1773 } 1774 1775 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 1776 link->link_id, 0); 1777 } 1778 1779 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 1780 unsigned int link_id) 1781 { 1782 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1783 1784 trace_api_chswitch_done(sdata, success, link_id); 1785 1786 rcu_read_lock(); 1787 1788 if (!success) { 1789 sdata_info(sdata, 1790 "driver channel switch failed, disconnecting\n"); 1791 wiphy_work_queue(sdata->local->hw.wiphy, 1792 &sdata->u.mgd.csa_connection_drop_work); 1793 } else { 1794 struct ieee80211_link_data *link = 1795 rcu_dereference(sdata->link[link_id]); 1796 1797 if (WARN_ON(!link)) { 1798 rcu_read_unlock(); 1799 return; 1800 } 1801 1802 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1803 &link->u.mgd.chswitch_work, 0); 1804 } 1805 1806 rcu_read_unlock(); 1807 } 1808 EXPORT_SYMBOL(ieee80211_chswitch_done); 1809 1810 static void 1811 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1812 { 1813 struct ieee80211_sub_if_data *sdata = link->sdata; 1814 struct ieee80211_local *local = sdata->local; 1815 1816 lockdep_assert_wiphy(local->hw.wiphy); 1817 1818 if (!local->ops->abort_channel_switch) 1819 return; 1820 1821 ieee80211_link_unreserve_chanctx(link); 1822 1823 if (link->csa_block_tx) 1824 ieee80211_wake_vif_queues(local, sdata, 1825 IEEE80211_QUEUE_STOP_REASON_CSA); 1826 1827 link->csa_block_tx = false; 1828 link->conf->csa_active = false; 1829 1830 drv_abort_channel_switch(sdata); 1831 } 1832 1833 static void 1834 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1835 u64 timestamp, u32 device_timestamp, 1836 struct ieee802_11_elems *elems, 1837 bool beacon) 1838 { 1839 struct ieee80211_sub_if_data *sdata = link->sdata; 1840 struct ieee80211_local *local = sdata->local; 1841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1842 struct cfg80211_bss *cbss = link->u.mgd.bss; 1843 struct ieee80211_chanctx_conf *conf; 1844 struct ieee80211_chanctx *chanctx; 1845 enum nl80211_band current_band; 1846 struct ieee80211_csa_ie csa_ie; 1847 struct ieee80211_channel_switch ch_switch; 1848 struct ieee80211_bss *bss; 1849 unsigned long timeout; 1850 int res; 1851 1852 lockdep_assert_wiphy(local->hw.wiphy); 1853 1854 if (!cbss) 1855 return; 1856 1857 current_band = cbss->channel->band; 1858 bss = (void *)cbss->priv; 1859 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1860 bss->vht_cap_info, 1861 link->u.mgd.conn_flags, 1862 link->u.mgd.bssid, &csa_ie); 1863 1864 if (!res) { 1865 ch_switch.timestamp = timestamp; 1866 ch_switch.device_timestamp = device_timestamp; 1867 ch_switch.block_tx = csa_ie.mode; 1868 ch_switch.chandef = csa_ie.chandef; 1869 ch_switch.count = csa_ie.count; 1870 ch_switch.delay = csa_ie.max_switch_time; 1871 } 1872 1873 if (res < 0) 1874 goto drop_connection; 1875 1876 if (beacon && link->conf->csa_active && 1877 !link->u.mgd.csa_waiting_bcn) { 1878 if (res) 1879 ieee80211_sta_abort_chanswitch(link); 1880 else 1881 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1882 return; 1883 } else if (link->conf->csa_active || res) { 1884 /* disregard subsequent announcements if already processing */ 1885 return; 1886 } 1887 1888 if (link->conf->chandef.chan->band != 1889 csa_ie.chandef.chan->band) { 1890 sdata_info(sdata, 1891 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1892 link->u.mgd.bssid, 1893 csa_ie.chandef.chan->center_freq, 1894 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1895 csa_ie.chandef.center_freq2); 1896 goto drop_connection; 1897 } 1898 1899 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1900 IEEE80211_CHAN_DISABLED)) { 1901 sdata_info(sdata, 1902 "AP %pM switches to unsupported channel " 1903 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1904 "disconnecting\n", 1905 link->u.mgd.bssid, 1906 csa_ie.chandef.chan->center_freq, 1907 csa_ie.chandef.chan->freq_offset, 1908 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1909 csa_ie.chandef.freq1_offset, 1910 csa_ie.chandef.center_freq2); 1911 goto drop_connection; 1912 } 1913 1914 if (cfg80211_chandef_identical(&csa_ie.chandef, 1915 &link->conf->chandef) && 1916 (!csa_ie.mode || !beacon)) { 1917 if (link->u.mgd.csa_ignored_same_chan) 1918 return; 1919 sdata_info(sdata, 1920 "AP %pM tries to chanswitch to same channel, ignore\n", 1921 link->u.mgd.bssid); 1922 link->u.mgd.csa_ignored_same_chan = true; 1923 return; 1924 } 1925 1926 /* 1927 * Drop all TDLS peers - either we disconnect or move to a different 1928 * channel from this point on. There's no telling what our peer will do. 1929 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1930 * have an incompatible wider chandef. 1931 */ 1932 ieee80211_teardown_tdls_peers(sdata); 1933 1934 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1935 lockdep_is_held(&local->hw.wiphy->mtx)); 1936 if (!conf) { 1937 sdata_info(sdata, 1938 "no channel context assigned to vif?, disconnecting\n"); 1939 goto drop_connection; 1940 } 1941 1942 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1943 1944 if (local->use_chanctx && 1945 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1946 sdata_info(sdata, 1947 "driver doesn't support chan-switch with channel contexts\n"); 1948 goto drop_connection; 1949 } 1950 1951 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1952 sdata_info(sdata, 1953 "preparing for channel switch failed, disconnecting\n"); 1954 goto drop_connection; 1955 } 1956 1957 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1958 chanctx->mode, false); 1959 if (res) { 1960 sdata_info(sdata, 1961 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1962 res); 1963 goto drop_connection; 1964 } 1965 1966 link->conf->csa_active = true; 1967 link->csa_chandef = csa_ie.chandef; 1968 link->csa_block_tx = csa_ie.mode; 1969 link->u.mgd.csa_ignored_same_chan = false; 1970 link->u.mgd.beacon_crc_valid = false; 1971 1972 if (link->csa_block_tx) 1973 ieee80211_stop_vif_queues(local, sdata, 1974 IEEE80211_QUEUE_STOP_REASON_CSA); 1975 1976 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1977 link->link_id, csa_ie.count, 1978 csa_ie.mode, 0); 1979 1980 if (local->ops->channel_switch) { 1981 /* use driver's channel switch callback */ 1982 drv_channel_switch(local, sdata, &ch_switch); 1983 return; 1984 } 1985 1986 /* channel switch handled in software */ 1987 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 1988 cbss->beacon_interval); 1989 wiphy_delayed_work_queue(local->hw.wiphy, 1990 &link->u.mgd.chswitch_work, 1991 timeout); 1992 return; 1993 drop_connection: 1994 /* 1995 * This is just so that the disconnect flow will know that 1996 * we were trying to switch channel and failed. In case the 1997 * mode is 1 (we are not allowed to Tx), we will know not to 1998 * send a deauthentication frame. Those two fields will be 1999 * reset when the disconnection worker runs. 2000 */ 2001 link->conf->csa_active = true; 2002 link->csa_block_tx = csa_ie.mode; 2003 2004 wiphy_work_queue(sdata->local->hw.wiphy, 2005 &ifmgd->csa_connection_drop_work); 2006 } 2007 2008 static bool 2009 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2010 struct ieee80211_channel *channel, 2011 const u8 *country_ie, u8 country_ie_len, 2012 const u8 *pwr_constr_elem, 2013 int *chan_pwr, int *pwr_reduction) 2014 { 2015 struct ieee80211_country_ie_triplet *triplet; 2016 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2017 int i, chan_increment; 2018 bool have_chan_pwr = false; 2019 2020 /* Invalid IE */ 2021 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2022 return false; 2023 2024 triplet = (void *)(country_ie + 3); 2025 country_ie_len -= 3; 2026 2027 switch (channel->band) { 2028 default: 2029 WARN_ON_ONCE(1); 2030 fallthrough; 2031 case NL80211_BAND_2GHZ: 2032 case NL80211_BAND_60GHZ: 2033 case NL80211_BAND_LC: 2034 chan_increment = 1; 2035 break; 2036 case NL80211_BAND_5GHZ: 2037 chan_increment = 4; 2038 break; 2039 case NL80211_BAND_6GHZ: 2040 /* 2041 * In the 6 GHz band, the "maximum transmit power level" 2042 * field in the triplets is reserved, and thus will be 2043 * zero and we shouldn't use it to control TX power. 2044 * The actual TX power will be given in the transmit 2045 * power envelope element instead. 2046 */ 2047 return false; 2048 } 2049 2050 /* find channel */ 2051 while (country_ie_len >= 3) { 2052 u8 first_channel = triplet->chans.first_channel; 2053 2054 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2055 goto next; 2056 2057 for (i = 0; i < triplet->chans.num_channels; i++) { 2058 if (first_channel + i * chan_increment == chan) { 2059 have_chan_pwr = true; 2060 *chan_pwr = triplet->chans.max_power; 2061 break; 2062 } 2063 } 2064 if (have_chan_pwr) 2065 break; 2066 2067 next: 2068 triplet++; 2069 country_ie_len -= 3; 2070 } 2071 2072 if (have_chan_pwr && pwr_constr_elem) 2073 *pwr_reduction = *pwr_constr_elem; 2074 else 2075 *pwr_reduction = 0; 2076 2077 return have_chan_pwr; 2078 } 2079 2080 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2081 struct ieee80211_channel *channel, 2082 const u8 *cisco_dtpc_ie, 2083 int *pwr_level) 2084 { 2085 /* From practical testing, the first data byte of the DTPC element 2086 * seems to contain the requested dBm level, and the CLI on Cisco 2087 * APs clearly state the range is -127 to 127 dBm, which indicates 2088 * a signed byte, although it seemingly never actually goes negative. 2089 * The other byte seems to always be zero. 2090 */ 2091 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2092 } 2093 2094 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2095 struct ieee80211_channel *channel, 2096 struct ieee80211_mgmt *mgmt, 2097 const u8 *country_ie, u8 country_ie_len, 2098 const u8 *pwr_constr_ie, 2099 const u8 *cisco_dtpc_ie) 2100 { 2101 struct ieee80211_sub_if_data *sdata = link->sdata; 2102 bool has_80211h_pwr = false, has_cisco_pwr = false; 2103 int chan_pwr = 0, pwr_reduction_80211h = 0; 2104 int pwr_level_cisco, pwr_level_80211h; 2105 int new_ap_level; 2106 __le16 capab = mgmt->u.probe_resp.capab_info; 2107 2108 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2109 return 0; /* TODO */ 2110 2111 if (country_ie && 2112 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2113 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2114 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2115 sdata, channel, country_ie, country_ie_len, 2116 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2117 pwr_level_80211h = 2118 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2119 } 2120 2121 if (cisco_dtpc_ie) { 2122 ieee80211_find_cisco_dtpc( 2123 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2124 has_cisco_pwr = true; 2125 } 2126 2127 if (!has_80211h_pwr && !has_cisco_pwr) 2128 return 0; 2129 2130 /* If we have both 802.11h and Cisco DTPC, apply both limits 2131 * by picking the smallest of the two power levels advertised. 2132 */ 2133 if (has_80211h_pwr && 2134 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2135 new_ap_level = pwr_level_80211h; 2136 2137 if (link->ap_power_level == new_ap_level) 2138 return 0; 2139 2140 sdata_dbg(sdata, 2141 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2142 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2143 link->u.mgd.bssid); 2144 } else { /* has_cisco_pwr is always true here. */ 2145 new_ap_level = pwr_level_cisco; 2146 2147 if (link->ap_power_level == new_ap_level) 2148 return 0; 2149 2150 sdata_dbg(sdata, 2151 "Limiting TX power to %d dBm as advertised by %pM\n", 2152 pwr_level_cisco, link->u.mgd.bssid); 2153 } 2154 2155 link->ap_power_level = new_ap_level; 2156 if (__ieee80211_recalc_txpower(sdata)) 2157 return BSS_CHANGED_TXPOWER; 2158 return 0; 2159 } 2160 2161 /* powersave */ 2162 static void ieee80211_enable_ps(struct ieee80211_local *local, 2163 struct ieee80211_sub_if_data *sdata) 2164 { 2165 struct ieee80211_conf *conf = &local->hw.conf; 2166 2167 /* 2168 * If we are scanning right now then the parameters will 2169 * take effect when scan finishes. 2170 */ 2171 if (local->scanning) 2172 return; 2173 2174 if (conf->dynamic_ps_timeout > 0 && 2175 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2176 mod_timer(&local->dynamic_ps_timer, jiffies + 2177 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2178 } else { 2179 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2180 ieee80211_send_nullfunc(local, sdata, true); 2181 2182 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2183 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2184 return; 2185 2186 conf->flags |= IEEE80211_CONF_PS; 2187 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2188 } 2189 } 2190 2191 static void ieee80211_change_ps(struct ieee80211_local *local) 2192 { 2193 struct ieee80211_conf *conf = &local->hw.conf; 2194 2195 if (local->ps_sdata) { 2196 ieee80211_enable_ps(local, local->ps_sdata); 2197 } else if (conf->flags & IEEE80211_CONF_PS) { 2198 conf->flags &= ~IEEE80211_CONF_PS; 2199 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2200 del_timer_sync(&local->dynamic_ps_timer); 2201 wiphy_work_cancel(local->hw.wiphy, 2202 &local->dynamic_ps_enable_work); 2203 } 2204 } 2205 2206 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2207 { 2208 struct ieee80211_local *local = sdata->local; 2209 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2210 struct sta_info *sta = NULL; 2211 bool authorized = false; 2212 2213 if (!mgd->powersave) 2214 return false; 2215 2216 if (mgd->broken_ap) 2217 return false; 2218 2219 if (!mgd->associated) 2220 return false; 2221 2222 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2223 return false; 2224 2225 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2226 !sdata->deflink.u.mgd.have_beacon) 2227 return false; 2228 2229 rcu_read_lock(); 2230 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2231 if (sta) 2232 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2233 rcu_read_unlock(); 2234 2235 return authorized; 2236 } 2237 2238 /* need to hold RTNL or interface lock */ 2239 void ieee80211_recalc_ps(struct ieee80211_local *local) 2240 { 2241 struct ieee80211_sub_if_data *sdata, *found = NULL; 2242 int count = 0; 2243 int timeout; 2244 2245 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2246 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2247 local->ps_sdata = NULL; 2248 return; 2249 } 2250 2251 list_for_each_entry(sdata, &local->interfaces, list) { 2252 if (!ieee80211_sdata_running(sdata)) 2253 continue; 2254 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2255 /* If an AP vif is found, then disable PS 2256 * by setting the count to zero thereby setting 2257 * ps_sdata to NULL. 2258 */ 2259 count = 0; 2260 break; 2261 } 2262 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2263 continue; 2264 found = sdata; 2265 count++; 2266 } 2267 2268 if (count == 1 && ieee80211_powersave_allowed(found)) { 2269 u8 dtimper = found->deflink.u.mgd.dtim_period; 2270 2271 timeout = local->dynamic_ps_forced_timeout; 2272 if (timeout < 0) 2273 timeout = 100; 2274 local->hw.conf.dynamic_ps_timeout = timeout; 2275 2276 /* If the TIM IE is invalid, pretend the value is 1 */ 2277 if (!dtimper) 2278 dtimper = 1; 2279 2280 local->hw.conf.ps_dtim_period = dtimper; 2281 local->ps_sdata = found; 2282 } else { 2283 local->ps_sdata = NULL; 2284 } 2285 2286 ieee80211_change_ps(local); 2287 } 2288 2289 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2290 { 2291 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2292 2293 if (sdata->vif.cfg.ps != ps_allowed) { 2294 sdata->vif.cfg.ps = ps_allowed; 2295 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2296 } 2297 } 2298 2299 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2300 struct wiphy_work *work) 2301 { 2302 struct ieee80211_local *local = 2303 container_of(work, struct ieee80211_local, 2304 dynamic_ps_disable_work); 2305 2306 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2307 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2308 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2309 } 2310 2311 ieee80211_wake_queues_by_reason(&local->hw, 2312 IEEE80211_MAX_QUEUE_MAP, 2313 IEEE80211_QUEUE_STOP_REASON_PS, 2314 false); 2315 } 2316 2317 void ieee80211_dynamic_ps_enable_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_enable_work); 2323 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2324 struct ieee80211_if_managed *ifmgd; 2325 unsigned long flags; 2326 int q; 2327 2328 /* can only happen when PS was just disabled anyway */ 2329 if (!sdata) 2330 return; 2331 2332 ifmgd = &sdata->u.mgd; 2333 2334 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2335 return; 2336 2337 if (local->hw.conf.dynamic_ps_timeout > 0) { 2338 /* don't enter PS if TX frames are pending */ 2339 if (drv_tx_frames_pending(local)) { 2340 mod_timer(&local->dynamic_ps_timer, jiffies + 2341 msecs_to_jiffies( 2342 local->hw.conf.dynamic_ps_timeout)); 2343 return; 2344 } 2345 2346 /* 2347 * transmission can be stopped by others which leads to 2348 * dynamic_ps_timer expiry. Postpone the ps timer if it 2349 * is not the actual idle state. 2350 */ 2351 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2352 for (q = 0; q < local->hw.queues; q++) { 2353 if (local->queue_stop_reasons[q]) { 2354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2355 flags); 2356 mod_timer(&local->dynamic_ps_timer, jiffies + 2357 msecs_to_jiffies( 2358 local->hw.conf.dynamic_ps_timeout)); 2359 return; 2360 } 2361 } 2362 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2363 } 2364 2365 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2366 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2367 if (drv_tx_frames_pending(local)) { 2368 mod_timer(&local->dynamic_ps_timer, jiffies + 2369 msecs_to_jiffies( 2370 local->hw.conf.dynamic_ps_timeout)); 2371 } else { 2372 ieee80211_send_nullfunc(local, sdata, true); 2373 /* Flush to get the tx status of nullfunc frame */ 2374 ieee80211_flush_queues(local, sdata, false); 2375 } 2376 } 2377 2378 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2379 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2380 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2381 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2382 local->hw.conf.flags |= IEEE80211_CONF_PS; 2383 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2384 } 2385 } 2386 2387 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2388 { 2389 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2390 2391 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 2392 } 2393 2394 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 2395 { 2396 struct ieee80211_link_data *link = 2397 container_of(work, struct ieee80211_link_data, 2398 dfs_cac_timer_work.work); 2399 struct cfg80211_chan_def chandef = link->conf->chandef; 2400 struct ieee80211_sub_if_data *sdata = link->sdata; 2401 2402 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2403 2404 if (sdata->wdev.cac_started) { 2405 ieee80211_link_release_channel(link); 2406 cfg80211_cac_event(sdata->dev, &chandef, 2407 NL80211_RADAR_CAC_FINISHED, 2408 GFP_KERNEL); 2409 } 2410 } 2411 2412 static bool 2413 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2414 { 2415 struct ieee80211_local *local = sdata->local; 2416 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2417 bool ret = false; 2418 int ac; 2419 2420 if (local->hw.queues < IEEE80211_NUM_ACS) 2421 return false; 2422 2423 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2424 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2425 int non_acm_ac; 2426 unsigned long now = jiffies; 2427 2428 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2429 tx_tspec->admitted_time && 2430 time_after(now, tx_tspec->time_slice_start + HZ)) { 2431 tx_tspec->consumed_tx_time = 0; 2432 tx_tspec->time_slice_start = now; 2433 2434 if (tx_tspec->downgraded) 2435 tx_tspec->action = 2436 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2437 } 2438 2439 switch (tx_tspec->action) { 2440 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2441 /* take the original parameters */ 2442 if (drv_conf_tx(local, &sdata->deflink, ac, 2443 &sdata->deflink.tx_conf[ac])) 2444 link_err(&sdata->deflink, 2445 "failed to set TX queue parameters for queue %d\n", 2446 ac); 2447 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2448 tx_tspec->downgraded = false; 2449 ret = true; 2450 break; 2451 case TX_TSPEC_ACTION_DOWNGRADE: 2452 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2453 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2454 ret = true; 2455 break; 2456 } 2457 /* downgrade next lower non-ACM AC */ 2458 for (non_acm_ac = ac + 1; 2459 non_acm_ac < IEEE80211_NUM_ACS; 2460 non_acm_ac++) 2461 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2462 break; 2463 /* Usually the loop will result in using BK even if it 2464 * requires admission control, but such a configuration 2465 * makes no sense and we have to transmit somehow - the 2466 * AC selection does the same thing. 2467 * If we started out trying to downgrade from BK, then 2468 * the extra condition here might be needed. 2469 */ 2470 if (non_acm_ac >= IEEE80211_NUM_ACS) 2471 non_acm_ac = IEEE80211_AC_BK; 2472 if (drv_conf_tx(local, &sdata->deflink, ac, 2473 &sdata->deflink.tx_conf[non_acm_ac])) 2474 link_err(&sdata->deflink, 2475 "failed to set TX queue parameters for queue %d\n", 2476 ac); 2477 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2478 ret = true; 2479 wiphy_delayed_work_queue(local->hw.wiphy, 2480 &ifmgd->tx_tspec_wk, 2481 tx_tspec->time_slice_start + 2482 HZ - now + 1); 2483 break; 2484 case TX_TSPEC_ACTION_NONE: 2485 /* nothing now */ 2486 break; 2487 } 2488 } 2489 2490 return ret; 2491 } 2492 2493 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2494 { 2495 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2496 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2497 BSS_CHANGED_QOS); 2498 } 2499 2500 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 2501 struct wiphy_work *work) 2502 { 2503 struct ieee80211_sub_if_data *sdata; 2504 2505 sdata = container_of(work, struct ieee80211_sub_if_data, 2506 u.mgd.tx_tspec_wk.work); 2507 ieee80211_sta_handle_tspec_ac_params(sdata); 2508 } 2509 2510 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2511 { 2512 struct ieee80211_sub_if_data *sdata = link->sdata; 2513 struct ieee80211_local *local = sdata->local; 2514 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2515 struct ieee80211_tx_queue_params *params = link->tx_conf; 2516 u8 ac; 2517 2518 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2519 mlme_dbg(sdata, 2520 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2521 ac, params[ac].acm, 2522 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2523 params[ac].txop, params[ac].uapsd, 2524 ifmgd->tx_tspec[ac].downgraded); 2525 if (!ifmgd->tx_tspec[ac].downgraded && 2526 drv_conf_tx(local, link, ac, ¶ms[ac])) 2527 link_err(link, 2528 "failed to set TX queue parameters for AC %d\n", 2529 ac); 2530 } 2531 } 2532 2533 /* MLME */ 2534 static bool 2535 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2536 struct ieee80211_link_data *link, 2537 const u8 *wmm_param, size_t wmm_param_len, 2538 const struct ieee80211_mu_edca_param_set *mu_edca) 2539 { 2540 struct ieee80211_sub_if_data *sdata = link->sdata; 2541 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2543 size_t left; 2544 int count, mu_edca_count, ac; 2545 const u8 *pos; 2546 u8 uapsd_queues = 0; 2547 2548 if (!local->ops->conf_tx) 2549 return false; 2550 2551 if (local->hw.queues < IEEE80211_NUM_ACS) 2552 return false; 2553 2554 if (!wmm_param) 2555 return false; 2556 2557 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2558 return false; 2559 2560 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2561 uapsd_queues = ifmgd->uapsd_queues; 2562 2563 count = wmm_param[6] & 0x0f; 2564 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2565 * if mu_edca was preset before and now it disappeared tell 2566 * the driver about it. 2567 */ 2568 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2569 if (count == link->u.mgd.wmm_last_param_set && 2570 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2571 return false; 2572 link->u.mgd.wmm_last_param_set = count; 2573 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2574 2575 pos = wmm_param + 8; 2576 left = wmm_param_len - 8; 2577 2578 memset(¶ms, 0, sizeof(params)); 2579 2580 sdata->wmm_acm = 0; 2581 for (; left >= 4; left -= 4, pos += 4) { 2582 int aci = (pos[0] >> 5) & 0x03; 2583 int acm = (pos[0] >> 4) & 0x01; 2584 bool uapsd = false; 2585 2586 switch (aci) { 2587 case 1: /* AC_BK */ 2588 ac = IEEE80211_AC_BK; 2589 if (acm) 2590 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2591 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2592 uapsd = true; 2593 params[ac].mu_edca = !!mu_edca; 2594 if (mu_edca) 2595 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2596 break; 2597 case 2: /* AC_VI */ 2598 ac = IEEE80211_AC_VI; 2599 if (acm) 2600 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2601 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2602 uapsd = true; 2603 params[ac].mu_edca = !!mu_edca; 2604 if (mu_edca) 2605 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2606 break; 2607 case 3: /* AC_VO */ 2608 ac = IEEE80211_AC_VO; 2609 if (acm) 2610 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2611 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2612 uapsd = true; 2613 params[ac].mu_edca = !!mu_edca; 2614 if (mu_edca) 2615 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2616 break; 2617 case 0: /* AC_BE */ 2618 default: 2619 ac = IEEE80211_AC_BE; 2620 if (acm) 2621 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2622 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2623 uapsd = true; 2624 params[ac].mu_edca = !!mu_edca; 2625 if (mu_edca) 2626 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2627 break; 2628 } 2629 2630 params[ac].aifs = pos[0] & 0x0f; 2631 2632 if (params[ac].aifs < 2) { 2633 link_info(link, 2634 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2635 params[ac].aifs, aci); 2636 params[ac].aifs = 2; 2637 } 2638 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2639 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2640 params[ac].txop = get_unaligned_le16(pos + 2); 2641 params[ac].acm = acm; 2642 params[ac].uapsd = uapsd; 2643 2644 if (params[ac].cw_min == 0 || 2645 params[ac].cw_min > params[ac].cw_max) { 2646 link_info(link, 2647 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2648 params[ac].cw_min, params[ac].cw_max, aci); 2649 return false; 2650 } 2651 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2652 } 2653 2654 /* WMM specification requires all 4 ACIs. */ 2655 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2656 if (params[ac].cw_min == 0) { 2657 link_info(link, 2658 "AP has invalid WMM params (missing AC %d), using defaults\n", 2659 ac); 2660 return false; 2661 } 2662 } 2663 2664 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2665 link->tx_conf[ac] = params[ac]; 2666 2667 ieee80211_mgd_set_link_qos_params(link); 2668 2669 /* enable WMM or activate new settings */ 2670 link->conf->qos = true; 2671 return true; 2672 } 2673 2674 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2675 { 2676 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2677 2678 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2679 ieee80211_run_deferred_scan(sdata->local); 2680 } 2681 2682 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2683 { 2684 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2685 2686 __ieee80211_stop_poll(sdata); 2687 } 2688 2689 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2690 u16 capab, bool erp_valid, u8 erp) 2691 { 2692 struct ieee80211_bss_conf *bss_conf = link->conf; 2693 struct ieee80211_supported_band *sband; 2694 u64 changed = 0; 2695 bool use_protection; 2696 bool use_short_preamble; 2697 bool use_short_slot; 2698 2699 sband = ieee80211_get_link_sband(link); 2700 if (!sband) 2701 return changed; 2702 2703 if (erp_valid) { 2704 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2705 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2706 } else { 2707 use_protection = false; 2708 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2709 } 2710 2711 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2712 if (sband->band == NL80211_BAND_5GHZ || 2713 sband->band == NL80211_BAND_6GHZ) 2714 use_short_slot = true; 2715 2716 if (use_protection != bss_conf->use_cts_prot) { 2717 bss_conf->use_cts_prot = use_protection; 2718 changed |= BSS_CHANGED_ERP_CTS_PROT; 2719 } 2720 2721 if (use_short_preamble != bss_conf->use_short_preamble) { 2722 bss_conf->use_short_preamble = use_short_preamble; 2723 changed |= BSS_CHANGED_ERP_PREAMBLE; 2724 } 2725 2726 if (use_short_slot != bss_conf->use_short_slot) { 2727 bss_conf->use_short_slot = use_short_slot; 2728 changed |= BSS_CHANGED_ERP_SLOT; 2729 } 2730 2731 return changed; 2732 } 2733 2734 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2735 struct cfg80211_bss *cbss) 2736 { 2737 struct ieee80211_sub_if_data *sdata = link->sdata; 2738 struct ieee80211_bss_conf *bss_conf = link->conf; 2739 struct ieee80211_bss *bss = (void *)cbss->priv; 2740 u64 changed = BSS_CHANGED_QOS; 2741 2742 /* not really used in MLO */ 2743 sdata->u.mgd.beacon_timeout = 2744 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2745 bss_conf->beacon_int)); 2746 2747 changed |= ieee80211_handle_bss_capability(link, 2748 bss_conf->assoc_capability, 2749 bss->has_erp_value, 2750 bss->erp_value); 2751 2752 ieee80211_check_rate_mask(link); 2753 2754 link->u.mgd.bss = cbss; 2755 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2756 2757 if (sdata->vif.p2p || 2758 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2759 const struct cfg80211_bss_ies *ies; 2760 2761 rcu_read_lock(); 2762 ies = rcu_dereference(cbss->ies); 2763 if (ies) { 2764 int ret; 2765 2766 ret = cfg80211_get_p2p_attr( 2767 ies->data, ies->len, 2768 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2769 (u8 *) &bss_conf->p2p_noa_attr, 2770 sizeof(bss_conf->p2p_noa_attr)); 2771 if (ret >= 2) { 2772 link->u.mgd.p2p_noa_index = 2773 bss_conf->p2p_noa_attr.index; 2774 changed |= BSS_CHANGED_P2P_PS; 2775 } 2776 } 2777 rcu_read_unlock(); 2778 } 2779 2780 if (link->u.mgd.have_beacon) { 2781 bss_conf->beacon_rate = bss->beacon_rate; 2782 changed |= BSS_CHANGED_BEACON_INFO; 2783 } else { 2784 bss_conf->beacon_rate = NULL; 2785 } 2786 2787 /* Tell the driver to monitor connection quality (if supported) */ 2788 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2789 bss_conf->cqm_rssi_thold) 2790 changed |= BSS_CHANGED_CQM; 2791 2792 return changed; 2793 } 2794 2795 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2796 struct ieee80211_mgd_assoc_data *assoc_data, 2797 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2798 { 2799 struct ieee80211_local *local = sdata->local; 2800 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2801 u64 vif_changed = BSS_CHANGED_ASSOC; 2802 unsigned int link_id; 2803 2804 lockdep_assert_wiphy(local->hw.wiphy); 2805 2806 sdata->u.mgd.associated = true; 2807 2808 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2809 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2810 struct ieee80211_link_data *link; 2811 2812 if (!cbss || 2813 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2814 continue; 2815 2816 if (ieee80211_vif_is_mld(&sdata->vif) && 2817 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 2818 continue; 2819 2820 link = sdata_dereference(sdata->link[link_id], sdata); 2821 if (WARN_ON(!link)) 2822 return; 2823 2824 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2825 } 2826 2827 /* just to be sure */ 2828 ieee80211_stop_poll(sdata); 2829 2830 ieee80211_led_assoc(local, 1); 2831 2832 vif_cfg->assoc = 1; 2833 2834 /* Enable ARP filtering */ 2835 if (vif_cfg->arp_addr_cnt) 2836 vif_changed |= BSS_CHANGED_ARP_FILTER; 2837 2838 if (ieee80211_vif_is_mld(&sdata->vif)) { 2839 for (link_id = 0; 2840 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2841 link_id++) { 2842 struct ieee80211_link_data *link; 2843 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2844 2845 if (!cbss || 2846 !(BIT(link_id) & 2847 ieee80211_vif_usable_links(&sdata->vif)) || 2848 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2849 continue; 2850 2851 link = sdata_dereference(sdata->link[link_id], sdata); 2852 if (WARN_ON(!link)) 2853 return; 2854 2855 ieee80211_link_info_change_notify(sdata, link, 2856 changed[link_id]); 2857 2858 ieee80211_recalc_smps(sdata, link); 2859 } 2860 2861 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2862 } else { 2863 ieee80211_bss_info_change_notify(sdata, 2864 vif_changed | changed[0]); 2865 } 2866 2867 ieee80211_recalc_ps(local); 2868 2869 /* leave this here to not change ordering in non-MLO cases */ 2870 if (!ieee80211_vif_is_mld(&sdata->vif)) 2871 ieee80211_recalc_smps(sdata, &sdata->deflink); 2872 ieee80211_recalc_ps_vif(sdata); 2873 2874 netif_carrier_on(sdata->dev); 2875 } 2876 2877 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2878 u16 stype, u16 reason, bool tx, 2879 u8 *frame_buf) 2880 { 2881 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2882 struct ieee80211_local *local = sdata->local; 2883 unsigned int link_id; 2884 u64 changed = 0; 2885 struct ieee80211_prep_tx_info info = { 2886 .subtype = stype, 2887 }; 2888 2889 lockdep_assert_wiphy(local->hw.wiphy); 2890 2891 if (WARN_ON_ONCE(tx && !frame_buf)) 2892 return; 2893 2894 if (WARN_ON(!ifmgd->associated)) 2895 return; 2896 2897 ieee80211_stop_poll(sdata); 2898 2899 ifmgd->associated = false; 2900 2901 /* other links will be destroyed */ 2902 sdata->deflink.u.mgd.bss = NULL; 2903 2904 netif_carrier_off(sdata->dev); 2905 2906 /* 2907 * if we want to get out of ps before disassoc (why?) we have 2908 * to do it before sending disassoc, as otherwise the null-packet 2909 * won't be valid. 2910 */ 2911 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2912 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2913 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2914 } 2915 local->ps_sdata = NULL; 2916 2917 /* disable per-vif ps */ 2918 ieee80211_recalc_ps_vif(sdata); 2919 2920 /* make sure ongoing transmission finishes */ 2921 synchronize_net(); 2922 2923 /* 2924 * drop any frame before deauth/disassoc, this can be data or 2925 * management frame. Since we are disconnecting, we should not 2926 * insist sending these frames which can take time and delay 2927 * the disconnection and possible the roaming. 2928 */ 2929 if (tx) 2930 ieee80211_flush_queues(local, sdata, true); 2931 2932 /* deauthenticate/disassociate now */ 2933 if (tx || frame_buf) { 2934 /* 2935 * In multi channel scenarios guarantee that the virtual 2936 * interface is granted immediate airtime to transmit the 2937 * deauthentication frame by calling mgd_prepare_tx, if the 2938 * driver requested so. 2939 */ 2940 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 2941 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 2942 link_id++) { 2943 struct ieee80211_link_data *link; 2944 2945 link = sdata_dereference(sdata->link[link_id], 2946 sdata); 2947 if (!link) 2948 continue; 2949 if (link->u.mgd.have_beacon) 2950 break; 2951 } 2952 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 2953 info.link_id = ffs(sdata->vif.active_links) - 1; 2954 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2955 } 2956 } 2957 2958 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2959 sdata->vif.cfg.ap_addr, stype, 2960 reason, tx, frame_buf); 2961 } 2962 2963 /* flush out frame - make sure the deauth was actually sent */ 2964 if (tx) 2965 ieee80211_flush_queues(local, sdata, false); 2966 2967 drv_mgd_complete_tx(sdata->local, sdata, &info); 2968 2969 /* clear AP addr only after building the needed mgmt frames */ 2970 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2971 eth_zero_addr(sdata->vif.cfg.ap_addr); 2972 2973 sdata->vif.cfg.ssid_len = 0; 2974 2975 /* remove AP and TDLS peers */ 2976 sta_info_flush(sdata); 2977 2978 /* finally reset all BSS / config parameters */ 2979 if (!ieee80211_vif_is_mld(&sdata->vif)) 2980 changed |= ieee80211_reset_erp_info(sdata); 2981 2982 ieee80211_led_assoc(local, 0); 2983 changed |= BSS_CHANGED_ASSOC; 2984 sdata->vif.cfg.assoc = false; 2985 2986 sdata->deflink.u.mgd.p2p_noa_index = -1; 2987 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2988 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2989 2990 /* on the next assoc, re-program HT/VHT parameters */ 2991 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2992 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2993 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2994 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2995 2996 /* 2997 * reset MU-MIMO ownership and group data in default link, 2998 * if used, other links are destroyed 2999 */ 3000 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3001 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3002 memset(sdata->vif.bss_conf.mu_group.position, 0, 3003 sizeof(sdata->vif.bss_conf.mu_group.position)); 3004 if (!ieee80211_vif_is_mld(&sdata->vif)) 3005 changed |= BSS_CHANGED_MU_GROUPS; 3006 sdata->vif.bss_conf.mu_mimo_owner = false; 3007 3008 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3009 3010 del_timer_sync(&local->dynamic_ps_timer); 3011 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3012 3013 /* Disable ARP filtering */ 3014 if (sdata->vif.cfg.arp_addr_cnt) 3015 changed |= BSS_CHANGED_ARP_FILTER; 3016 3017 sdata->vif.bss_conf.qos = false; 3018 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3019 changed |= BSS_CHANGED_QOS; 3020 /* The BSSID (not really interesting) and HT changed */ 3021 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3022 ieee80211_bss_info_change_notify(sdata, changed); 3023 } else { 3024 ieee80211_vif_cfg_change_notify(sdata, changed); 3025 } 3026 3027 /* disassociated - set to defaults now */ 3028 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3029 3030 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3031 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3032 del_timer_sync(&sdata->u.mgd.timer); 3033 3034 sdata->vif.bss_conf.dtim_period = 0; 3035 sdata->vif.bss_conf.beacon_rate = NULL; 3036 3037 sdata->deflink.u.mgd.have_beacon = false; 3038 sdata->deflink.u.mgd.tracking_signal_avg = false; 3039 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3040 3041 ifmgd->flags = 0; 3042 sdata->deflink.u.mgd.conn_flags = 0; 3043 3044 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3045 struct ieee80211_link_data *link; 3046 3047 link = sdata_dereference(sdata->link[link_id], sdata); 3048 if (!link) 3049 continue; 3050 ieee80211_link_release_channel(link); 3051 } 3052 3053 sdata->vif.bss_conf.csa_active = false; 3054 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3055 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3056 if (sdata->deflink.csa_block_tx) { 3057 ieee80211_wake_vif_queues(local, sdata, 3058 IEEE80211_QUEUE_STOP_REASON_CSA); 3059 sdata->deflink.csa_block_tx = false; 3060 } 3061 3062 /* existing TX TSPEC sessions no longer exist */ 3063 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3064 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3065 3066 sdata->vif.bss_conf.pwr_reduction = 0; 3067 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3068 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3069 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3070 3071 memset(&sdata->u.mgd.ttlm_info, 0, 3072 sizeof(sdata->u.mgd.ttlm_info)); 3073 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3074 ieee80211_vif_set_links(sdata, 0, 0); 3075 } 3076 3077 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3078 { 3079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3080 struct ieee80211_local *local = sdata->local; 3081 3082 lockdep_assert_wiphy(local->hw.wiphy); 3083 3084 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3085 return; 3086 3087 __ieee80211_stop_poll(sdata); 3088 3089 ieee80211_recalc_ps(local); 3090 3091 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3092 return; 3093 3094 /* 3095 * We've received a probe response, but are not sure whether 3096 * we have or will be receiving any beacons or data, so let's 3097 * schedule the timers again, just in case. 3098 */ 3099 ieee80211_sta_reset_beacon_monitor(sdata); 3100 3101 mod_timer(&ifmgd->conn_mon_timer, 3102 round_jiffies_up(jiffies + 3103 IEEE80211_CONNECTION_IDLE_TIME)); 3104 } 3105 3106 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3107 struct ieee80211_hdr *hdr, 3108 u16 tx_time) 3109 { 3110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3111 u16 tid; 3112 int ac; 3113 struct ieee80211_sta_tx_tspec *tx_tspec; 3114 unsigned long now = jiffies; 3115 3116 if (!ieee80211_is_data_qos(hdr->frame_control)) 3117 return; 3118 3119 tid = ieee80211_get_tid(hdr); 3120 ac = ieee80211_ac_from_tid(tid); 3121 tx_tspec = &ifmgd->tx_tspec[ac]; 3122 3123 if (likely(!tx_tspec->admitted_time)) 3124 return; 3125 3126 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3127 tx_tspec->consumed_tx_time = 0; 3128 tx_tspec->time_slice_start = now; 3129 3130 if (tx_tspec->downgraded) { 3131 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3132 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3133 &ifmgd->tx_tspec_wk, 0); 3134 } 3135 } 3136 3137 if (tx_tspec->downgraded) 3138 return; 3139 3140 tx_tspec->consumed_tx_time += tx_time; 3141 3142 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3143 tx_tspec->downgraded = true; 3144 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3145 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3146 &ifmgd->tx_tspec_wk, 0); 3147 } 3148 } 3149 3150 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3151 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3152 { 3153 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3154 3155 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3156 !sdata->u.mgd.probe_send_count) 3157 return; 3158 3159 if (ack) 3160 sdata->u.mgd.probe_send_count = 0; 3161 else 3162 sdata->u.mgd.nullfunc_failed = true; 3163 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3164 } 3165 3166 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3167 const u8 *src, const u8 *dst, 3168 const u8 *ssid, size_t ssid_len, 3169 struct ieee80211_channel *channel) 3170 { 3171 struct sk_buff *skb; 3172 3173 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3174 ssid, ssid_len, NULL, 0, 3175 IEEE80211_PROBE_FLAG_DIRECTED); 3176 if (skb) 3177 ieee80211_tx_skb(sdata, skb); 3178 } 3179 3180 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3181 { 3182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3183 u8 *dst = sdata->vif.cfg.ap_addr; 3184 u8 unicast_limit = max(1, max_probe_tries - 3); 3185 struct sta_info *sta; 3186 3187 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3188 3189 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3190 return; 3191 3192 /* 3193 * Try sending broadcast probe requests for the last three 3194 * probe requests after the first ones failed since some 3195 * buggy APs only support broadcast probe requests. 3196 */ 3197 if (ifmgd->probe_send_count >= unicast_limit) 3198 dst = NULL; 3199 3200 /* 3201 * When the hardware reports an accurate Tx ACK status, it's 3202 * better to send a nullfunc frame instead of a probe request, 3203 * as it will kick us off the AP quickly if we aren't associated 3204 * anymore. The timeout will be reset if the frame is ACKed by 3205 * the AP. 3206 */ 3207 ifmgd->probe_send_count++; 3208 3209 if (dst) { 3210 sta = sta_info_get(sdata, dst); 3211 if (!WARN_ON(!sta)) 3212 ieee80211_check_fast_rx(sta); 3213 } 3214 3215 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3216 ifmgd->nullfunc_failed = false; 3217 ieee80211_send_nullfunc(sdata->local, sdata, false); 3218 } else { 3219 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3220 sdata->vif.cfg.ssid, 3221 sdata->vif.cfg.ssid_len, 3222 sdata->deflink.u.mgd.bss->channel); 3223 } 3224 3225 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3226 run_again(sdata, ifmgd->probe_timeout); 3227 } 3228 3229 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3230 bool beacon) 3231 { 3232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3233 bool already = false; 3234 3235 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3236 3237 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3238 return; 3239 3240 if (!ieee80211_sdata_running(sdata)) 3241 return; 3242 3243 if (!ifmgd->associated) 3244 return; 3245 3246 if (sdata->local->tmp_channel || sdata->local->scanning) 3247 return; 3248 3249 if (sdata->local->suspending) { 3250 /* reschedule after resume */ 3251 ieee80211_reset_ap_probe(sdata); 3252 return; 3253 } 3254 3255 if (beacon) { 3256 mlme_dbg_ratelimited(sdata, 3257 "detected beacon loss from AP (missed %d beacons) - probing\n", 3258 beacon_loss_count); 3259 3260 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3261 } 3262 3263 /* 3264 * The driver/our work has already reported this event or the 3265 * connection monitoring has kicked in and we have already sent 3266 * a probe request. Or maybe the AP died and the driver keeps 3267 * reporting until we disassociate... 3268 * 3269 * In either case we have to ignore the current call to this 3270 * function (except for setting the correct probe reason bit) 3271 * because otherwise we would reset the timer every time and 3272 * never check whether we received a probe response! 3273 */ 3274 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3275 already = true; 3276 3277 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3278 3279 if (already) 3280 return; 3281 3282 ieee80211_recalc_ps(sdata->local); 3283 3284 ifmgd->probe_send_count = 0; 3285 ieee80211_mgd_probe_ap_send(sdata); 3286 } 3287 3288 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3289 struct ieee80211_vif *vif) 3290 { 3291 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3293 struct cfg80211_bss *cbss; 3294 struct sk_buff *skb; 3295 const struct element *ssid; 3296 int ssid_len; 3297 3298 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3299 3300 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3301 ieee80211_vif_is_mld(&sdata->vif))) 3302 return NULL; 3303 3304 if (ifmgd->associated) 3305 cbss = sdata->deflink.u.mgd.bss; 3306 else if (ifmgd->auth_data) 3307 cbss = ifmgd->auth_data->bss; 3308 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3309 cbss = ifmgd->assoc_data->link[0].bss; 3310 else 3311 return NULL; 3312 3313 rcu_read_lock(); 3314 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3315 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3316 "invalid SSID element (len=%d)", 3317 ssid ? ssid->datalen : -1)) 3318 ssid_len = 0; 3319 else 3320 ssid_len = ssid->datalen; 3321 3322 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3323 (u32) -1, cbss->channel, 3324 ssid->data, ssid_len, 3325 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3326 rcu_read_unlock(); 3327 3328 return skb; 3329 } 3330 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3331 3332 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3333 const u8 *buf, size_t len, bool tx, 3334 u16 reason, bool reconnect) 3335 { 3336 struct ieee80211_event event = { 3337 .type = MLME_EVENT, 3338 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3339 .u.mlme.reason = reason, 3340 }; 3341 3342 if (tx) 3343 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3344 else 3345 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3346 3347 drv_event_callback(sdata->local, sdata, &event); 3348 } 3349 3350 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3351 { 3352 struct ieee80211_local *local = sdata->local; 3353 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3354 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3355 bool tx; 3356 3357 lockdep_assert_wiphy(local->hw.wiphy); 3358 3359 if (!ifmgd->associated) 3360 return; 3361 3362 /* in MLO assume we have a link where we can TX the frame */ 3363 tx = ieee80211_vif_is_mld(&sdata->vif) || 3364 !sdata->deflink.csa_block_tx; 3365 3366 if (!ifmgd->driver_disconnect) { 3367 unsigned int link_id; 3368 3369 /* 3370 * AP is probably out of range (or not reachable for another 3371 * reason) so remove the bss structs for that AP. In the case 3372 * of multi-link, it's not clear that all of them really are 3373 * out of range, but if they weren't the driver likely would 3374 * have switched to just have a single link active? 3375 */ 3376 for (link_id = 0; 3377 link_id < ARRAY_SIZE(sdata->link); 3378 link_id++) { 3379 struct ieee80211_link_data *link; 3380 3381 link = sdata_dereference(sdata->link[link_id], sdata); 3382 if (!link) 3383 continue; 3384 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3385 link->u.mgd.bss = NULL; 3386 } 3387 } 3388 3389 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3390 ifmgd->driver_disconnect ? 3391 WLAN_REASON_DEAUTH_LEAVING : 3392 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3393 tx, frame_buf); 3394 /* the other links will be destroyed */ 3395 sdata->vif.bss_conf.csa_active = false; 3396 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3397 if (sdata->deflink.csa_block_tx) { 3398 ieee80211_wake_vif_queues(local, sdata, 3399 IEEE80211_QUEUE_STOP_REASON_CSA); 3400 sdata->deflink.csa_block_tx = false; 3401 } 3402 3403 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3404 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3405 ifmgd->reconnect); 3406 ifmgd->reconnect = false; 3407 } 3408 3409 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3410 struct wiphy_work *work) 3411 { 3412 struct ieee80211_sub_if_data *sdata = 3413 container_of(work, struct ieee80211_sub_if_data, 3414 u.mgd.beacon_connection_loss_work); 3415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3416 3417 if (ifmgd->connection_loss) { 3418 sdata_info(sdata, "Connection to AP %pM lost\n", 3419 sdata->vif.cfg.ap_addr); 3420 __ieee80211_disconnect(sdata); 3421 ifmgd->connection_loss = false; 3422 } else if (ifmgd->driver_disconnect) { 3423 sdata_info(sdata, 3424 "Driver requested disconnection from AP %pM\n", 3425 sdata->vif.cfg.ap_addr); 3426 __ieee80211_disconnect(sdata); 3427 ifmgd->driver_disconnect = false; 3428 } else { 3429 if (ifmgd->associated) 3430 sdata->deflink.u.mgd.beacon_loss_count++; 3431 ieee80211_mgd_probe_ap(sdata, true); 3432 } 3433 } 3434 3435 static void ieee80211_csa_connection_drop_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.csa_connection_drop_work); 3441 3442 __ieee80211_disconnect(sdata); 3443 } 3444 3445 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3446 { 3447 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3448 struct ieee80211_hw *hw = &sdata->local->hw; 3449 3450 trace_api_beacon_loss(sdata); 3451 3452 sdata->u.mgd.connection_loss = false; 3453 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3454 } 3455 EXPORT_SYMBOL(ieee80211_beacon_loss); 3456 3457 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3458 { 3459 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3460 struct ieee80211_hw *hw = &sdata->local->hw; 3461 3462 trace_api_connection_loss(sdata); 3463 3464 sdata->u.mgd.connection_loss = true; 3465 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3466 } 3467 EXPORT_SYMBOL(ieee80211_connection_loss); 3468 3469 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3470 { 3471 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3472 struct ieee80211_hw *hw = &sdata->local->hw; 3473 3474 trace_api_disconnect(sdata, reconnect); 3475 3476 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3477 return; 3478 3479 sdata->u.mgd.driver_disconnect = true; 3480 sdata->u.mgd.reconnect = reconnect; 3481 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3482 } 3483 EXPORT_SYMBOL(ieee80211_disconnect); 3484 3485 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3486 bool assoc) 3487 { 3488 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3489 3490 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3491 3492 if (!assoc) { 3493 /* 3494 * we are not authenticated yet, the only timer that could be 3495 * running is the timeout for the authentication response which 3496 * which is not relevant anymore. 3497 */ 3498 del_timer_sync(&sdata->u.mgd.timer); 3499 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3500 3501 /* other links are destroyed */ 3502 sdata->deflink.u.mgd.conn_flags = 0; 3503 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3504 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3505 BSS_CHANGED_BSSID); 3506 sdata->u.mgd.flags = 0; 3507 3508 ieee80211_link_release_channel(&sdata->deflink); 3509 ieee80211_vif_set_links(sdata, 0, 0); 3510 } 3511 3512 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3513 kfree(auth_data); 3514 sdata->u.mgd.auth_data = NULL; 3515 } 3516 3517 enum assoc_status { 3518 ASSOC_SUCCESS, 3519 ASSOC_REJECTED, 3520 ASSOC_TIMEOUT, 3521 ASSOC_ABANDON, 3522 }; 3523 3524 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3525 enum assoc_status status) 3526 { 3527 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3528 3529 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3530 3531 if (status != ASSOC_SUCCESS) { 3532 /* 3533 * we are not associated yet, the only timer that could be 3534 * running is the timeout for the association response which 3535 * which is not relevant anymore. 3536 */ 3537 del_timer_sync(&sdata->u.mgd.timer); 3538 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3539 3540 sdata->deflink.u.mgd.conn_flags = 0; 3541 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3542 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3543 BSS_CHANGED_BSSID); 3544 sdata->u.mgd.flags = 0; 3545 sdata->vif.bss_conf.mu_mimo_owner = false; 3546 3547 if (status != ASSOC_REJECTED) { 3548 struct cfg80211_assoc_failure data = { 3549 .timeout = status == ASSOC_TIMEOUT, 3550 }; 3551 int i; 3552 3553 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3554 ARRAY_SIZE(assoc_data->link)); 3555 3556 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3557 data.bss[i] = assoc_data->link[i].bss; 3558 3559 if (ieee80211_vif_is_mld(&sdata->vif)) 3560 data.ap_mld_addr = assoc_data->ap_addr; 3561 3562 cfg80211_assoc_failure(sdata->dev, &data); 3563 } 3564 3565 ieee80211_link_release_channel(&sdata->deflink); 3566 ieee80211_vif_set_links(sdata, 0, 0); 3567 } 3568 3569 kfree(assoc_data); 3570 sdata->u.mgd.assoc_data = NULL; 3571 } 3572 3573 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3574 struct ieee80211_mgmt *mgmt, size_t len) 3575 { 3576 struct ieee80211_local *local = sdata->local; 3577 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3578 const struct element *challenge; 3579 u8 *pos; 3580 u32 tx_flags = 0; 3581 struct ieee80211_prep_tx_info info = { 3582 .subtype = IEEE80211_STYPE_AUTH, 3583 .link_id = auth_data->link_id, 3584 }; 3585 3586 pos = mgmt->u.auth.variable; 3587 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3588 len - (pos - (u8 *)mgmt)); 3589 if (!challenge) 3590 return; 3591 auth_data->expected_transaction = 4; 3592 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3593 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3594 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3595 IEEE80211_TX_INTFL_MLME_CONN_TX; 3596 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3597 (void *)challenge, 3598 challenge->datalen + sizeof(*challenge), 3599 auth_data->ap_addr, auth_data->ap_addr, 3600 auth_data->key, auth_data->key_len, 3601 auth_data->key_idx, tx_flags); 3602 } 3603 3604 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3605 { 3606 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3607 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3608 struct sta_info *sta; 3609 3610 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3611 3612 sdata_info(sdata, "authenticated\n"); 3613 ifmgd->auth_data->done = true; 3614 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3615 ifmgd->auth_data->timeout_started = true; 3616 run_again(sdata, ifmgd->auth_data->timeout); 3617 3618 /* move station state to auth */ 3619 sta = sta_info_get(sdata, ap_addr); 3620 if (!sta) { 3621 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3622 return false; 3623 } 3624 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3625 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3626 return false; 3627 } 3628 3629 return true; 3630 } 3631 3632 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3633 struct ieee80211_mgmt *mgmt, size_t len) 3634 { 3635 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3636 u16 auth_alg, auth_transaction, status_code; 3637 struct ieee80211_event event = { 3638 .type = MLME_EVENT, 3639 .u.mlme.data = AUTH_EVENT, 3640 }; 3641 struct ieee80211_prep_tx_info info = { 3642 .subtype = IEEE80211_STYPE_AUTH, 3643 }; 3644 3645 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3646 3647 if (len < 24 + 6) 3648 return; 3649 3650 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3651 return; 3652 3653 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3654 return; 3655 3656 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3657 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3658 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3659 3660 if (auth_alg != ifmgd->auth_data->algorithm || 3661 (auth_alg != WLAN_AUTH_SAE && 3662 auth_transaction != ifmgd->auth_data->expected_transaction) || 3663 (auth_alg == WLAN_AUTH_SAE && 3664 (auth_transaction < ifmgd->auth_data->expected_transaction || 3665 auth_transaction > 2))) { 3666 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3667 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3668 auth_transaction, 3669 ifmgd->auth_data->expected_transaction); 3670 goto notify_driver; 3671 } 3672 3673 if (status_code != WLAN_STATUS_SUCCESS) { 3674 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3675 3676 if (auth_alg == WLAN_AUTH_SAE && 3677 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3678 (auth_transaction == 1 && 3679 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3680 status_code == WLAN_STATUS_SAE_PK)))) { 3681 /* waiting for userspace now */ 3682 ifmgd->auth_data->waiting = true; 3683 ifmgd->auth_data->timeout = 3684 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3685 ifmgd->auth_data->timeout_started = true; 3686 run_again(sdata, ifmgd->auth_data->timeout); 3687 goto notify_driver; 3688 } 3689 3690 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3691 mgmt->sa, status_code); 3692 ieee80211_destroy_auth_data(sdata, false); 3693 event.u.mlme.status = MLME_DENIED; 3694 event.u.mlme.reason = status_code; 3695 drv_event_callback(sdata->local, sdata, &event); 3696 goto notify_driver; 3697 } 3698 3699 switch (ifmgd->auth_data->algorithm) { 3700 case WLAN_AUTH_OPEN: 3701 case WLAN_AUTH_LEAP: 3702 case WLAN_AUTH_FT: 3703 case WLAN_AUTH_SAE: 3704 case WLAN_AUTH_FILS_SK: 3705 case WLAN_AUTH_FILS_SK_PFS: 3706 case WLAN_AUTH_FILS_PK: 3707 break; 3708 case WLAN_AUTH_SHARED_KEY: 3709 if (ifmgd->auth_data->expected_transaction != 4) { 3710 ieee80211_auth_challenge(sdata, mgmt, len); 3711 /* need another frame */ 3712 return; 3713 } 3714 break; 3715 default: 3716 WARN_ONCE(1, "invalid auth alg %d", 3717 ifmgd->auth_data->algorithm); 3718 goto notify_driver; 3719 } 3720 3721 event.u.mlme.status = MLME_SUCCESS; 3722 info.success = 1; 3723 drv_event_callback(sdata->local, sdata, &event); 3724 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3725 (auth_transaction == 2 && 3726 ifmgd->auth_data->expected_transaction == 2)) { 3727 if (!ieee80211_mark_sta_auth(sdata)) 3728 return; /* ignore frame -- wait for timeout */ 3729 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3730 auth_transaction == 2) { 3731 sdata_info(sdata, "SAE peer confirmed\n"); 3732 ifmgd->auth_data->peer_confirmed = true; 3733 } 3734 3735 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3736 notify_driver: 3737 drv_mgd_complete_tx(sdata->local, sdata, &info); 3738 } 3739 3740 #define case_WLAN(type) \ 3741 case WLAN_REASON_##type: return #type 3742 3743 const char *ieee80211_get_reason_code_string(u16 reason_code) 3744 { 3745 switch (reason_code) { 3746 case_WLAN(UNSPECIFIED); 3747 case_WLAN(PREV_AUTH_NOT_VALID); 3748 case_WLAN(DEAUTH_LEAVING); 3749 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3750 case_WLAN(DISASSOC_AP_BUSY); 3751 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3752 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3753 case_WLAN(DISASSOC_STA_HAS_LEFT); 3754 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3755 case_WLAN(DISASSOC_BAD_POWER); 3756 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3757 case_WLAN(INVALID_IE); 3758 case_WLAN(MIC_FAILURE); 3759 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3760 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3761 case_WLAN(IE_DIFFERENT); 3762 case_WLAN(INVALID_GROUP_CIPHER); 3763 case_WLAN(INVALID_PAIRWISE_CIPHER); 3764 case_WLAN(INVALID_AKMP); 3765 case_WLAN(UNSUPP_RSN_VERSION); 3766 case_WLAN(INVALID_RSN_IE_CAP); 3767 case_WLAN(IEEE8021X_FAILED); 3768 case_WLAN(CIPHER_SUITE_REJECTED); 3769 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3770 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3771 case_WLAN(DISASSOC_LOW_ACK); 3772 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3773 case_WLAN(QSTA_LEAVE_QBSS); 3774 case_WLAN(QSTA_NOT_USE); 3775 case_WLAN(QSTA_REQUIRE_SETUP); 3776 case_WLAN(QSTA_TIMEOUT); 3777 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3778 case_WLAN(MESH_PEER_CANCELED); 3779 case_WLAN(MESH_MAX_PEERS); 3780 case_WLAN(MESH_CONFIG); 3781 case_WLAN(MESH_CLOSE); 3782 case_WLAN(MESH_MAX_RETRIES); 3783 case_WLAN(MESH_CONFIRM_TIMEOUT); 3784 case_WLAN(MESH_INVALID_GTK); 3785 case_WLAN(MESH_INCONSISTENT_PARAM); 3786 case_WLAN(MESH_INVALID_SECURITY); 3787 case_WLAN(MESH_PATH_ERROR); 3788 case_WLAN(MESH_PATH_NOFORWARD); 3789 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3790 case_WLAN(MAC_EXISTS_IN_MBSS); 3791 case_WLAN(MESH_CHAN_REGULATORY); 3792 case_WLAN(MESH_CHAN); 3793 default: return "<unknown>"; 3794 } 3795 } 3796 3797 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3798 struct ieee80211_mgmt *mgmt, size_t len) 3799 { 3800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3801 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3802 3803 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3804 3805 if (len < 24 + 2) 3806 return; 3807 3808 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3809 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3810 return; 3811 } 3812 3813 if (ifmgd->associated && 3814 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3815 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3816 sdata->vif.cfg.ap_addr, reason_code, 3817 ieee80211_get_reason_code_string(reason_code)); 3818 3819 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3820 3821 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3822 reason_code, false); 3823 return; 3824 } 3825 3826 if (ifmgd->assoc_data && 3827 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3828 sdata_info(sdata, 3829 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3830 ifmgd->assoc_data->ap_addr, reason_code, 3831 ieee80211_get_reason_code_string(reason_code)); 3832 3833 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3834 3835 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3836 return; 3837 } 3838 } 3839 3840 3841 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3842 struct ieee80211_mgmt *mgmt, size_t len) 3843 { 3844 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3845 u16 reason_code; 3846 3847 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3848 3849 if (len < 24 + 2) 3850 return; 3851 3852 if (!ifmgd->associated || 3853 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3854 return; 3855 3856 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3857 3858 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3859 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3860 return; 3861 } 3862 3863 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3864 sdata->vif.cfg.ap_addr, reason_code, 3865 ieee80211_get_reason_code_string(reason_code)); 3866 3867 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3868 3869 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3870 false); 3871 } 3872 3873 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3874 u8 *supp_rates, unsigned int supp_rates_len, 3875 u32 *rates, u32 *basic_rates, 3876 bool *have_higher_than_11mbit, 3877 int *min_rate, int *min_rate_index) 3878 { 3879 int i, j; 3880 3881 for (i = 0; i < supp_rates_len; i++) { 3882 int rate = supp_rates[i] & 0x7f; 3883 bool is_basic = !!(supp_rates[i] & 0x80); 3884 3885 if ((rate * 5) > 110) 3886 *have_higher_than_11mbit = true; 3887 3888 /* 3889 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 3890 * selectors since they're not rates. 3891 * 3892 * Note: Even though the membership selector and the basic 3893 * rate flag share the same bit, they are not exactly 3894 * the same. 3895 */ 3896 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3897 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3898 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3899 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 3900 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3901 continue; 3902 3903 for (j = 0; j < sband->n_bitrates; j++) { 3904 struct ieee80211_rate *br; 3905 int brate; 3906 3907 br = &sband->bitrates[j]; 3908 3909 brate = DIV_ROUND_UP(br->bitrate, 5); 3910 if (brate == rate) { 3911 *rates |= BIT(j); 3912 if (is_basic) 3913 *basic_rates |= BIT(j); 3914 if ((rate * 5) < *min_rate) { 3915 *min_rate = rate * 5; 3916 *min_rate_index = j; 3917 } 3918 break; 3919 } 3920 } 3921 } 3922 } 3923 3924 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3925 struct ieee80211_supported_band *sband, 3926 const struct link_sta_info *link_sta, 3927 const struct ieee802_11_elems *elems) 3928 { 3929 const struct ieee80211_sta_he_cap *own_he_cap = 3930 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3931 3932 if (elems->ext_capab_len < 10) 3933 return false; 3934 3935 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3936 return false; 3937 3938 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3939 IEEE80211_HE_MAC_CAP0_TWT_RES && 3940 own_he_cap && 3941 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3942 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3943 } 3944 3945 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3946 struct ieee80211_supported_band *sband, 3947 struct ieee80211_link_data *link, 3948 struct link_sta_info *link_sta, 3949 struct ieee802_11_elems *elems) 3950 { 3951 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3952 3953 if (link->conf->twt_requester != twt) { 3954 link->conf->twt_requester = twt; 3955 return BSS_CHANGED_TWT; 3956 } 3957 return 0; 3958 } 3959 3960 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3961 struct ieee80211_bss_conf *bss_conf, 3962 struct ieee80211_supported_band *sband, 3963 struct link_sta_info *link_sta) 3964 { 3965 const struct ieee80211_sta_he_cap *own_he_cap = 3966 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3967 3968 return bss_conf->he_support && 3969 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3970 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3971 own_he_cap && 3972 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3973 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3974 } 3975 3976 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3977 struct link_sta_info *link_sta, 3978 struct cfg80211_bss *cbss, 3979 struct ieee80211_mgmt *mgmt, 3980 const u8 *elem_start, 3981 unsigned int elem_len, 3982 u64 *changed) 3983 { 3984 struct ieee80211_sub_if_data *sdata = link->sdata; 3985 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3986 struct ieee80211_bss_conf *bss_conf = link->conf; 3987 struct ieee80211_local *local = sdata->local; 3988 unsigned int link_id = link->link_id; 3989 struct ieee80211_elems_parse_params parse_params = { 3990 .start = elem_start, 3991 .len = elem_len, 3992 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 3993 .from_ap = true, 3994 }; 3995 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3996 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3997 const struct cfg80211_bss_ies *bss_ies = NULL; 3998 struct ieee80211_supported_band *sband; 3999 struct ieee802_11_elems *elems; 4000 const __le16 prof_bss_param_ch_present = 4001 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4002 u16 capab_info; 4003 bool ret; 4004 4005 elems = ieee802_11_parse_elems_full(&parse_params); 4006 if (!elems) 4007 return false; 4008 4009 if (link_id == assoc_data->assoc_link_id) { 4010 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4011 4012 /* 4013 * we should not get to this flow unless the association was 4014 * successful, so set the status directly to success 4015 */ 4016 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4017 if (elems->ml_basic) { 4018 if (!(elems->ml_basic->control & 4019 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT))) { 4020 ret = false; 4021 goto out; 4022 } 4023 link->u.mgd.bss_param_ch_cnt = 4024 ieee80211_mle_get_bss_param_ch_cnt(elems->ml_basic); 4025 } 4026 } else if (!elems->prof || 4027 !(elems->prof->control & prof_bss_param_ch_present)) { 4028 ret = false; 4029 goto out; 4030 } else { 4031 const u8 *ptr = elems->prof->variable + 4032 elems->prof->sta_info_len - 1; 4033 4034 /* 4035 * During parsing, we validated that these fields exist, 4036 * otherwise elems->prof would have been set to NULL. 4037 */ 4038 capab_info = get_unaligned_le16(ptr); 4039 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4040 link->u.mgd.bss_param_ch_cnt = 4041 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4042 4043 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4044 link_info(link, "association response status code=%u\n", 4045 assoc_data->link[link_id].status); 4046 ret = true; 4047 goto out; 4048 } 4049 } 4050 4051 if (!is_s1g && !elems->supp_rates) { 4052 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4053 ret = false; 4054 goto out; 4055 } 4056 4057 link->u.mgd.tdls_chan_switch_prohibited = 4058 elems->ext_capab && elems->ext_capab_len >= 5 && 4059 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4060 4061 /* 4062 * Some APs are erroneously not including some information in their 4063 * (re)association response frames. Try to recover by using the data 4064 * from the beacon or probe response. This seems to afflict mobile 4065 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4066 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4067 */ 4068 if (!is_6ghz && 4069 ((assoc_data->wmm && !elems->wmm_param) || 4070 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4071 (!elems->ht_cap_elem || !elems->ht_operation)) || 4072 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4073 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4074 const struct cfg80211_bss_ies *ies; 4075 struct ieee802_11_elems *bss_elems; 4076 4077 rcu_read_lock(); 4078 ies = rcu_dereference(cbss->ies); 4079 if (ies) 4080 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4081 GFP_ATOMIC); 4082 rcu_read_unlock(); 4083 if (!bss_ies) { 4084 ret = false; 4085 goto out; 4086 } 4087 4088 parse_params.start = bss_ies->data; 4089 parse_params.len = bss_ies->len; 4090 parse_params.bss = cbss; 4091 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4092 if (!bss_elems) { 4093 ret = false; 4094 goto out; 4095 } 4096 4097 if (assoc_data->wmm && 4098 !elems->wmm_param && bss_elems->wmm_param) { 4099 elems->wmm_param = bss_elems->wmm_param; 4100 sdata_info(sdata, 4101 "AP bug: WMM param missing from AssocResp\n"); 4102 } 4103 4104 /* 4105 * Also check if we requested HT/VHT, otherwise the AP doesn't 4106 * have to include the IEs in the (re)association response. 4107 */ 4108 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4109 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4110 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4111 sdata_info(sdata, 4112 "AP bug: HT capability missing from AssocResp\n"); 4113 } 4114 if (!elems->ht_operation && bss_elems->ht_operation && 4115 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4116 elems->ht_operation = bss_elems->ht_operation; 4117 sdata_info(sdata, 4118 "AP bug: HT operation missing from AssocResp\n"); 4119 } 4120 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4121 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4122 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4123 sdata_info(sdata, 4124 "AP bug: VHT capa missing from AssocResp\n"); 4125 } 4126 if (!elems->vht_operation && bss_elems->vht_operation && 4127 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4128 elems->vht_operation = bss_elems->vht_operation; 4129 sdata_info(sdata, 4130 "AP bug: VHT operation missing from AssocResp\n"); 4131 } 4132 4133 kfree(bss_elems); 4134 } 4135 4136 /* 4137 * We previously checked these in the beacon/probe response, so 4138 * they should be present here. This is just a safety net. 4139 */ 4140 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4141 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4142 sdata_info(sdata, 4143 "HT AP is missing WMM params or HT capability/operation\n"); 4144 ret = false; 4145 goto out; 4146 } 4147 4148 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4149 (!elems->vht_cap_elem || !elems->vht_operation)) { 4150 sdata_info(sdata, 4151 "VHT AP is missing VHT capability/operation\n"); 4152 ret = false; 4153 goto out; 4154 } 4155 4156 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4157 !elems->he_6ghz_capa) { 4158 sdata_info(sdata, 4159 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4160 ret = false; 4161 goto out; 4162 } 4163 4164 if (WARN_ON(!link->conf->chandef.chan)) { 4165 ret = false; 4166 goto out; 4167 } 4168 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4169 4170 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4171 (!elems->he_cap || !elems->he_operation)) { 4172 sdata_info(sdata, 4173 "HE AP is missing HE capability/operation\n"); 4174 ret = false; 4175 goto out; 4176 } 4177 4178 /* Set up internal HT/VHT capabilities */ 4179 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4180 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4181 elems->ht_cap_elem, 4182 link_sta); 4183 4184 if (elems->vht_cap_elem && 4185 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4186 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4187 const struct cfg80211_bss_ies *ies; 4188 4189 /* 4190 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4191 * too large maximum MPDU length in the association response 4192 * (indicating 12k) that it cannot actually process ... 4193 * Work around that. 4194 */ 4195 rcu_read_lock(); 4196 ies = rcu_dereference(cbss->ies); 4197 if (ies) { 4198 const struct element *elem; 4199 4200 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4201 ies->data, ies->len); 4202 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4203 bss_vht_cap = (const void *)elem->data; 4204 } 4205 4206 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4207 elems->vht_cap_elem, 4208 bss_vht_cap, link_sta); 4209 rcu_read_unlock(); 4210 } 4211 4212 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4213 elems->he_cap) { 4214 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4215 elems->he_cap, 4216 elems->he_cap_len, 4217 elems->he_6ghz_capa, 4218 link_sta); 4219 4220 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4221 if (elems->rsnx && elems->rsnx_len && 4222 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4223 wiphy_ext_feature_isset(local->hw.wiphy, 4224 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4225 bss_conf->twt_protected = true; 4226 else 4227 bss_conf->twt_protected = false; 4228 4229 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4230 link_sta, elems); 4231 4232 if (elems->eht_operation && elems->eht_cap && 4233 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4234 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4235 elems->he_cap, 4236 elems->he_cap_len, 4237 elems->eht_cap, 4238 elems->eht_cap_len, 4239 link_sta); 4240 4241 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4242 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4243 } else { 4244 bss_conf->eht_support = false; 4245 } 4246 } else { 4247 bss_conf->he_support = false; 4248 bss_conf->twt_requester = false; 4249 bss_conf->twt_protected = false; 4250 bss_conf->eht_support = false; 4251 } 4252 4253 bss_conf->twt_broadcast = 4254 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4255 4256 if (bss_conf->he_support) { 4257 bss_conf->he_bss_color.color = 4258 le32_get_bits(elems->he_operation->he_oper_params, 4259 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4260 bss_conf->he_bss_color.partial = 4261 le32_get_bits(elems->he_operation->he_oper_params, 4262 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4263 bss_conf->he_bss_color.enabled = 4264 !le32_get_bits(elems->he_operation->he_oper_params, 4265 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4266 4267 if (bss_conf->he_bss_color.enabled) 4268 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4269 4270 bss_conf->htc_trig_based_pkt_ext = 4271 le32_get_bits(elems->he_operation->he_oper_params, 4272 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4273 bss_conf->frame_time_rts_th = 4274 le32_get_bits(elems->he_operation->he_oper_params, 4275 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4276 4277 bss_conf->uora_exists = !!elems->uora_element; 4278 if (elems->uora_element) 4279 bss_conf->uora_ocw_range = elems->uora_element[0]; 4280 4281 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4282 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4283 /* TODO: OPEN: what happens if BSS color disable is set? */ 4284 } 4285 4286 if (cbss->transmitted_bss) { 4287 bss_conf->nontransmitted = true; 4288 ether_addr_copy(bss_conf->transmitter_bssid, 4289 cbss->transmitted_bss->bssid); 4290 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4291 bss_conf->bssid_index = cbss->bssid_index; 4292 } 4293 4294 /* 4295 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4296 * in their association response, so ignore that data for our own 4297 * configuration. If it changed since the last beacon, we'll get the 4298 * next beacon and update then. 4299 */ 4300 4301 /* 4302 * If an operating mode notification IE is present, override the 4303 * NSS calculation (that would be done in rate_control_rate_init()) 4304 * and use the # of streams from that element. 4305 */ 4306 if (elems->opmode_notif && 4307 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4308 u8 nss; 4309 4310 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4311 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4312 nss += 1; 4313 link_sta->pub->rx_nss = nss; 4314 } 4315 4316 /* 4317 * Always handle WMM once after association regardless 4318 * of the first value the AP uses. Setting -1 here has 4319 * that effect because the AP values is an unsigned 4320 * 4-bit value. 4321 */ 4322 link->u.mgd.wmm_last_param_set = -1; 4323 link->u.mgd.mu_edca_last_param_set = -1; 4324 4325 if (link->u.mgd.disable_wmm_tracking) { 4326 ieee80211_set_wmm_default(link, false, false); 4327 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4328 elems->wmm_param_len, 4329 elems->mu_edca_param_set)) { 4330 /* still enable QoS since we might have HT/VHT */ 4331 ieee80211_set_wmm_default(link, false, true); 4332 /* disable WMM tracking in this case to disable 4333 * tracking WMM parameter changes in the beacon if 4334 * the parameters weren't actually valid. Doing so 4335 * avoids changing parameters very strangely when 4336 * the AP is going back and forth between valid and 4337 * invalid parameters. 4338 */ 4339 link->u.mgd.disable_wmm_tracking = true; 4340 } 4341 4342 if (elems->max_idle_period_ie) { 4343 bss_conf->max_idle_period = 4344 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4345 bss_conf->protected_keep_alive = 4346 !!(elems->max_idle_period_ie->idle_options & 4347 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4348 *changed |= BSS_CHANGED_KEEP_ALIVE; 4349 } else { 4350 bss_conf->max_idle_period = 0; 4351 bss_conf->protected_keep_alive = false; 4352 } 4353 4354 /* set assoc capability (AID was already set earlier), 4355 * ieee80211_set_associated() will tell the driver */ 4356 bss_conf->assoc_capability = capab_info; 4357 4358 ret = true; 4359 out: 4360 kfree(elems); 4361 kfree(bss_ies); 4362 return ret; 4363 } 4364 4365 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4366 struct sta_info *sta, 4367 struct link_sta_info *link_sta, 4368 struct cfg80211_bss *cbss) 4369 { 4370 struct ieee80211_sub_if_data *sdata = link->sdata; 4371 struct ieee80211_local *local = sdata->local; 4372 struct ieee80211_bss *bss = (void *)cbss->priv; 4373 u32 rates = 0, basic_rates = 0; 4374 bool have_higher_than_11mbit = false; 4375 int min_rate = INT_MAX, min_rate_index = -1; 4376 struct ieee80211_supported_band *sband; 4377 4378 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4379 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4380 4381 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4382 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4383 ieee80211_s1g_sta_rate_init(sta); 4384 return 0; 4385 } 4386 4387 sband = local->hw.wiphy->bands[cbss->channel->band]; 4388 4389 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4390 &rates, &basic_rates, &have_higher_than_11mbit, 4391 &min_rate, &min_rate_index); 4392 4393 /* 4394 * This used to be a workaround for basic rates missing 4395 * in the association response frame. Now that we no 4396 * longer use the basic rates from there, it probably 4397 * doesn't happen any more, but keep the workaround so 4398 * in case some *other* APs are buggy in different ways 4399 * we can connect -- with a warning. 4400 * Allow this workaround only in case the AP provided at least 4401 * one rate. 4402 */ 4403 if (min_rate_index < 0) { 4404 link_info(link, "No legacy rates in association response\n"); 4405 return -EINVAL; 4406 } else if (!basic_rates) { 4407 link_info(link, "No basic rates, using min rate instead\n"); 4408 basic_rates = BIT(min_rate_index); 4409 } 4410 4411 if (rates) 4412 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4413 else 4414 link_info(link, "No rates found, keeping mandatory only\n"); 4415 4416 link->conf->basic_rates = basic_rates; 4417 4418 /* cf. IEEE 802.11 9.2.12 */ 4419 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4420 have_higher_than_11mbit; 4421 4422 return 0; 4423 } 4424 4425 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4426 struct cfg80211_bss *cbss) 4427 { 4428 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4429 const struct element *ht_cap_elem, *vht_cap_elem; 4430 const struct cfg80211_bss_ies *ies; 4431 const struct ieee80211_ht_cap *ht_cap; 4432 const struct ieee80211_vht_cap *vht_cap; 4433 const struct ieee80211_he_cap_elem *he_cap; 4434 const struct element *he_cap_elem; 4435 u16 mcs_80_map, mcs_160_map; 4436 int i, mcs_nss_size; 4437 bool support_160; 4438 u8 chains = 1; 4439 4440 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4441 return chains; 4442 4443 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4444 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4445 ht_cap = (void *)ht_cap_elem->data; 4446 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4447 /* 4448 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4449 * "Tx Unequal Modulation Supported" fields. 4450 */ 4451 } 4452 4453 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4454 return chains; 4455 4456 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4457 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4458 u8 nss; 4459 u16 tx_mcs_map; 4460 4461 vht_cap = (void *)vht_cap_elem->data; 4462 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4463 for (nss = 8; nss > 0; nss--) { 4464 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4465 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4466 break; 4467 } 4468 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4469 chains = max(chains, nss); 4470 } 4471 4472 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4473 return chains; 4474 4475 ies = rcu_dereference(cbss->ies); 4476 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4477 ies->data, ies->len); 4478 4479 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4480 return chains; 4481 4482 /* skip one byte ext_tag_id */ 4483 he_cap = (void *)(he_cap_elem->data + 1); 4484 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4485 4486 /* invalid HE IE */ 4487 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4488 return chains; 4489 4490 /* mcs_nss is right after he_cap info */ 4491 he_mcs_nss_supp = (void *)(he_cap + 1); 4492 4493 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4494 4495 for (i = 7; i >= 0; i--) { 4496 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4497 4498 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4499 chains = max_t(u8, chains, i + 1); 4500 break; 4501 } 4502 } 4503 4504 support_160 = he_cap->phy_cap_info[0] & 4505 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4506 4507 if (!support_160) 4508 return chains; 4509 4510 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4511 for (i = 7; i >= 0; i--) { 4512 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4513 4514 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4515 chains = max_t(u8, chains, i + 1); 4516 break; 4517 } 4518 } 4519 4520 return chains; 4521 } 4522 4523 static bool 4524 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4525 const struct cfg80211_bss_ies *ies, 4526 const struct ieee80211_he_operation *he_op) 4527 { 4528 const struct element *he_cap_elem; 4529 const struct ieee80211_he_cap_elem *he_cap; 4530 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4531 u16 mcs_80_map_tx, mcs_80_map_rx; 4532 u16 ap_min_req_set; 4533 int mcs_nss_size; 4534 int nss; 4535 4536 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4537 ies->data, ies->len); 4538 4539 if (!he_cap_elem) 4540 return false; 4541 4542 /* invalid HE IE */ 4543 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4544 sdata_info(sdata, 4545 "Invalid HE elem, Disable HE\n"); 4546 return false; 4547 } 4548 4549 /* skip one byte ext_tag_id */ 4550 he_cap = (void *)(he_cap_elem->data + 1); 4551 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4552 4553 /* invalid HE IE */ 4554 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4555 sdata_info(sdata, 4556 "Invalid HE elem with nss size, Disable HE\n"); 4557 return false; 4558 } 4559 4560 /* mcs_nss is right after he_cap info */ 4561 he_mcs_nss_supp = (void *)(he_cap + 1); 4562 4563 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4564 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4565 4566 /* P802.11-REVme/D0.3 4567 * 27.1.1 Introduction to the HE PHY 4568 * ... 4569 * An HE STA shall support the following features: 4570 * ... 4571 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4572 * supported channel widths for HE SU PPDUs 4573 */ 4574 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4575 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4576 sdata_info(sdata, 4577 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4578 mcs_80_map_tx, mcs_80_map_rx); 4579 return false; 4580 } 4581 4582 if (!he_op) 4583 return true; 4584 4585 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4586 4587 /* 4588 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4589 * zeroes, which is nonsense, and completely inconsistent with itself 4590 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4591 */ 4592 if (!ap_min_req_set) 4593 return true; 4594 4595 /* make sure the AP is consistent with itself 4596 * 4597 * P802.11-REVme/D0.3 4598 * 26.17.1 Basic HE BSS operation 4599 * 4600 * A STA that is operating in an HE BSS shall be able to receive and 4601 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4602 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4603 * MLME-START.request primitive and shall be able to receive at each of 4604 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4605 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4606 * primitive 4607 */ 4608 for (nss = 8; nss > 0; nss--) { 4609 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4610 u8 ap_rx_val; 4611 u8 ap_tx_val; 4612 4613 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4614 continue; 4615 4616 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4617 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4618 4619 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4620 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4621 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4622 sdata_info(sdata, 4623 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4624 nss, ap_rx_val, ap_rx_val, ap_op_val); 4625 return false; 4626 } 4627 } 4628 4629 return true; 4630 } 4631 4632 static bool 4633 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4634 struct ieee80211_supported_band *sband, 4635 const struct ieee80211_he_operation *he_op) 4636 { 4637 const struct ieee80211_sta_he_cap *sta_he_cap = 4638 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4639 u16 ap_min_req_set; 4640 int i; 4641 4642 if (!sta_he_cap || !he_op) 4643 return false; 4644 4645 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4646 4647 /* 4648 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4649 * zeroes, which is nonsense, and completely inconsistent with itself 4650 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4651 */ 4652 if (!ap_min_req_set) 4653 return true; 4654 4655 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4656 for (i = 0; i < 3; i++) { 4657 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4658 &sta_he_cap->he_mcs_nss_supp; 4659 u16 sta_mcs_map_rx = 4660 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4661 u16 sta_mcs_map_tx = 4662 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4663 u8 nss; 4664 bool verified = true; 4665 4666 /* 4667 * For each band there is a maximum of 8 spatial streams 4668 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4669 * of 2 bits per NSS (1-8), with the values defined in enum 4670 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4671 * capabilities aren't less than the AP's minimum requirements 4672 * for this HE BSS per SS. 4673 * It is enough to find one such band that meets the reqs. 4674 */ 4675 for (nss = 8; nss > 0; nss--) { 4676 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4677 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4678 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4679 4680 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4681 continue; 4682 4683 /* 4684 * Make sure the HE AP doesn't require MCSs that aren't 4685 * supported by the client as required by spec 4686 * 4687 * P802.11-REVme/D0.3 4688 * 26.17.1 Basic HE BSS operation 4689 * 4690 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4691 * a BSS, unless it supports (i.e., is able to both transmit and 4692 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4693 * HE-MCS and NSS set. 4694 */ 4695 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4696 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4697 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4698 verified = false; 4699 break; 4700 } 4701 } 4702 4703 if (verified) 4704 return true; 4705 } 4706 4707 /* If here, STA doesn't meet AP's HE min requirements */ 4708 return false; 4709 } 4710 4711 static u8 4712 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 4713 const struct ieee80211_sta_eht_cap *sta_eht_cap, 4714 unsigned int idx, int bw) 4715 { 4716 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 4717 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 4718 4719 /* handle us being a 20 MHz-only EHT STA - with four values 4720 * for MCS 0-7, 8-9, 10-11, 12-13. 4721 */ 4722 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 4723 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 4724 4725 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 4726 if (idx > 0) 4727 idx--; 4728 4729 switch (bw) { 4730 case 0: 4731 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 4732 case 1: 4733 if (!(he_phy_cap0 & 4734 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 4735 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 4736 return 0xff; /* pass check */ 4737 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 4738 case 2: 4739 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 4740 return 0xff; /* pass check */ 4741 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 4742 } 4743 4744 WARN_ON(1); 4745 return 0; 4746 } 4747 4748 static bool 4749 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 4750 struct ieee80211_supported_band *sband, 4751 const struct ieee80211_eht_operation *eht_op) 4752 { 4753 const struct ieee80211_sta_he_cap *sta_he_cap = 4754 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4755 const struct ieee80211_sta_eht_cap *sta_eht_cap = 4756 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4757 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 4758 unsigned int i; 4759 4760 if (!sta_he_cap || !sta_eht_cap || !eht_op) 4761 return false; 4762 4763 req = &eht_op->basic_mcs_nss; 4764 4765 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 4766 u8 req_rx_nss, req_tx_nss; 4767 unsigned int bw; 4768 4769 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4770 IEEE80211_EHT_MCS_NSS_RX); 4771 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4772 IEEE80211_EHT_MCS_NSS_TX); 4773 4774 for (bw = 0; bw < 3; bw++) { 4775 u8 have, have_rx_nss, have_tx_nss; 4776 4777 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 4778 sta_eht_cap, 4779 i, bw); 4780 have_rx_nss = u8_get_bits(have, 4781 IEEE80211_EHT_MCS_NSS_RX); 4782 have_tx_nss = u8_get_bits(have, 4783 IEEE80211_EHT_MCS_NSS_TX); 4784 4785 if (req_rx_nss > have_rx_nss || 4786 req_tx_nss > have_tx_nss) 4787 return false; 4788 } 4789 } 4790 4791 return true; 4792 } 4793 4794 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4795 struct ieee80211_link_data *link, 4796 struct cfg80211_bss *cbss, 4797 bool mlo, 4798 ieee80211_conn_flags_t *conn_flags) 4799 { 4800 struct ieee80211_local *local = sdata->local; 4801 const struct ieee80211_ht_cap *ht_cap = NULL; 4802 const struct ieee80211_ht_operation *ht_oper = NULL; 4803 const struct ieee80211_vht_operation *vht_oper = NULL; 4804 const struct ieee80211_he_operation *he_oper = NULL; 4805 const struct ieee80211_eht_operation *eht_oper = NULL; 4806 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4807 struct ieee80211_supported_band *sband; 4808 struct cfg80211_chan_def chandef; 4809 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4810 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4811 bool supports_mlo = false; 4812 struct ieee80211_bss *bss = (void *)cbss->priv; 4813 struct ieee80211_elems_parse_params parse_params = { 4814 .link_id = -1, 4815 .from_ap = true, 4816 }; 4817 struct ieee802_11_elems *elems; 4818 const struct cfg80211_bss_ies *ies; 4819 int ret; 4820 u32 i; 4821 bool have_80mhz; 4822 4823 lockdep_assert_wiphy(local->hw.wiphy); 4824 4825 rcu_read_lock(); 4826 4827 ies = rcu_dereference(cbss->ies); 4828 parse_params.start = ies->data; 4829 parse_params.len = ies->len; 4830 elems = ieee802_11_parse_elems_full(&parse_params); 4831 if (!elems) { 4832 rcu_read_unlock(); 4833 return -ENOMEM; 4834 } 4835 4836 sband = local->hw.wiphy->bands[cbss->channel->band]; 4837 4838 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4839 IEEE80211_CONN_DISABLE_80P80MHZ | 4840 IEEE80211_CONN_DISABLE_160MHZ); 4841 4842 /* disable HT/VHT/HE if we don't support them */ 4843 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4844 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4845 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4846 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4847 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4848 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4849 } 4850 4851 if (!sband->vht_cap.vht_supported && is_5ghz) { 4852 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4853 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4854 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4855 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4856 } 4857 4858 if (!ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 4859 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4860 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4861 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4862 } 4863 4864 if (!ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) { 4865 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4866 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4867 } 4868 4869 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4870 ht_oper = elems->ht_operation; 4871 ht_cap = elems->ht_cap_elem; 4872 4873 if (!ht_cap) { 4874 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4875 ht_oper = NULL; 4876 } 4877 } 4878 4879 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4880 vht_oper = elems->vht_operation; 4881 if (vht_oper && !ht_oper) { 4882 vht_oper = NULL; 4883 sdata_info(sdata, 4884 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4885 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4886 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4887 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4888 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4889 } 4890 4891 if (!elems->vht_cap_elem) { 4892 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4893 vht_oper = NULL; 4894 } 4895 } 4896 4897 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4898 he_oper = elems->he_operation; 4899 4900 if (link && is_6ghz) { 4901 struct ieee80211_bss_conf *bss_conf; 4902 u8 j = 0; 4903 4904 bss_conf = link->conf; 4905 4906 if (elems->pwr_constr_elem) 4907 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4908 4909 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4910 ARRAY_SIZE(elems->tx_pwr_env)); 4911 4912 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4913 if (elems->tx_pwr_env_len[i] > 4914 sizeof(bss_conf->tx_pwr_env[j])) 4915 continue; 4916 4917 bss_conf->tx_pwr_env_num++; 4918 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4919 elems->tx_pwr_env_len[i]); 4920 j++; 4921 } 4922 } 4923 4924 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4925 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4926 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4927 IEEE80211_CONN_DISABLE_EHT; 4928 } 4929 4930 /* 4931 * EHT requires HE to be supported as well. Specifically for 6 GHz 4932 * channels, the operation channel information can only be deduced from 4933 * both the 6 GHz operation information (from the HE operation IE) and 4934 * EHT operation. 4935 */ 4936 if (!(*conn_flags & 4937 (IEEE80211_CONN_DISABLE_HE | 4938 IEEE80211_CONN_DISABLE_EHT)) && 4939 he_oper) { 4940 const struct cfg80211_bss_ies *cbss_ies; 4941 const struct element *eht_ml_elem; 4942 const u8 *eht_oper_ie; 4943 4944 cbss_ies = rcu_dereference(cbss->ies); 4945 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4946 cbss_ies->data, cbss_ies->len); 4947 if (eht_oper_ie && eht_oper_ie[1] >= 4948 1 + sizeof(struct ieee80211_eht_operation)) 4949 eht_oper = (void *)(eht_oper_ie + 3); 4950 else 4951 eht_oper = NULL; 4952 4953 if (!ieee80211_verify_sta_eht_mcs_support(sdata, sband, eht_oper)) 4954 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4955 4956 eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 4957 cbss_ies->data, cbss_ies->len); 4958 4959 /* data + 1 / datalen - 1 since it's an extended element */ 4960 if (!(*conn_flags & IEEE80211_CONN_DISABLE_EHT) && 4961 eht_ml_elem && 4962 ieee80211_mle_type_ok(eht_ml_elem->data + 1, 4963 IEEE80211_ML_CONTROL_TYPE_BASIC, 4964 eht_ml_elem->datalen - 1)) { 4965 supports_mlo = true; 4966 4967 sdata->vif.cfg.eml_cap = 4968 ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1); 4969 sdata->vif.cfg.eml_med_sync_delay = 4970 ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1); 4971 } 4972 } 4973 4974 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4975 have_80mhz = false; 4976 for (i = 0; i < sband->n_channels; i++) { 4977 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4978 IEEE80211_CHAN_NO_80MHZ)) 4979 continue; 4980 4981 have_80mhz = true; 4982 break; 4983 } 4984 4985 if (!have_80mhz) { 4986 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4987 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4988 } 4989 4990 if (sband->band == NL80211_BAND_S1GHZ) { 4991 s1g_oper = elems->s1g_oper; 4992 if (!s1g_oper) 4993 sdata_info(sdata, 4994 "AP missing S1G operation element?\n"); 4995 } 4996 4997 *conn_flags |= 4998 ieee80211_determine_chantype(sdata, link, *conn_flags, 4999 sband, 5000 cbss->channel, 5001 bss->vht_cap_info, 5002 ht_oper, vht_oper, 5003 he_oper, eht_oper, 5004 s1g_oper, 5005 &chandef, false); 5006 5007 if (link) 5008 link->needed_rx_chains = 5009 min(ieee80211_max_rx_chains(link, cbss), 5010 local->rx_chains); 5011 5012 rcu_read_unlock(); 5013 /* the element data was RCU protected so no longer valid anyway */ 5014 kfree(elems); 5015 elems = NULL; 5016 5017 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 5018 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5019 return -EINVAL; 5020 } 5021 5022 if (mlo && !supports_mlo) { 5023 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5024 return -EINVAL; 5025 } 5026 5027 if (!link) 5028 return 0; 5029 5030 /* will change later if needed */ 5031 link->smps_mode = IEEE80211_SMPS_OFF; 5032 5033 /* 5034 * If this fails (possibly due to channel context sharing 5035 * on incompatible channels, e.g. 80+80 and 160 sharing the 5036 * same control channel) try to use a smaller bandwidth. 5037 */ 5038 ret = ieee80211_link_use_channel(link, &chandef, 5039 IEEE80211_CHANCTX_SHARED); 5040 5041 /* don't downgrade for 5 and 10 MHz channels, though. */ 5042 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5043 chandef.width == NL80211_CHAN_WIDTH_10) 5044 goto out; 5045 5046 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5047 *conn_flags |= 5048 ieee80211_chandef_downgrade(&chandef); 5049 ret = ieee80211_link_use_channel(link, &chandef, 5050 IEEE80211_CHANCTX_SHARED); 5051 } 5052 out: 5053 return ret; 5054 } 5055 5056 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5057 u8 *dtim_count, u8 *dtim_period) 5058 { 5059 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5060 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5061 ies->len); 5062 const struct ieee80211_tim_ie *tim = NULL; 5063 const struct ieee80211_bssid_index *idx; 5064 bool valid = tim_ie && tim_ie[1] >= 2; 5065 5066 if (valid) 5067 tim = (void *)(tim_ie + 2); 5068 5069 if (dtim_count) 5070 *dtim_count = valid ? tim->dtim_count : 0; 5071 5072 if (dtim_period) 5073 *dtim_period = valid ? tim->dtim_period : 0; 5074 5075 /* Check if value is overridden by non-transmitted profile */ 5076 if (!idx_ie || idx_ie[1] < 3) 5077 return valid; 5078 5079 idx = (void *)(idx_ie + 2); 5080 5081 if (dtim_count) 5082 *dtim_count = idx->dtim_count; 5083 5084 if (dtim_period) 5085 *dtim_period = idx->dtim_period; 5086 5087 return true; 5088 } 5089 5090 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5091 struct ieee80211_mgmt *mgmt, 5092 struct ieee802_11_elems *elems, 5093 const u8 *elem_start, unsigned int elem_len) 5094 { 5095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5096 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5097 struct ieee80211_local *local = sdata->local; 5098 unsigned int link_id; 5099 struct sta_info *sta; 5100 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5101 u16 valid_links = 0, dormant_links = 0; 5102 int err; 5103 5104 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5105 /* 5106 * station info was already allocated and inserted before 5107 * the association and should be available to us 5108 */ 5109 sta = sta_info_get(sdata, assoc_data->ap_addr); 5110 if (WARN_ON(!sta)) 5111 goto out_err; 5112 5113 if (ieee80211_vif_is_mld(&sdata->vif)) { 5114 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5115 if (!assoc_data->link[link_id].bss) 5116 continue; 5117 5118 valid_links |= BIT(link_id); 5119 if (assoc_data->link[link_id].disabled) 5120 dormant_links |= BIT(link_id); 5121 5122 if (link_id != assoc_data->assoc_link_id) { 5123 err = ieee80211_sta_allocate_link(sta, link_id); 5124 if (err) 5125 goto out_err; 5126 } 5127 } 5128 5129 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5130 } 5131 5132 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5133 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5134 struct ieee80211_link_data *link; 5135 struct link_sta_info *link_sta; 5136 5137 if (!cbss) 5138 continue; 5139 5140 link = sdata_dereference(sdata->link[link_id], sdata); 5141 if (WARN_ON(!link)) 5142 goto out_err; 5143 5144 if (ieee80211_vif_is_mld(&sdata->vif)) 5145 link_info(link, 5146 "local address %pM, AP link address %pM%s\n", 5147 link->conf->addr, 5148 assoc_data->link[link_id].bss->bssid, 5149 link_id == assoc_data->assoc_link_id ? 5150 " (assoc)" : ""); 5151 5152 link_sta = rcu_dereference_protected(sta->link[link_id], 5153 lockdep_is_held(&local->hw.wiphy->mtx)); 5154 if (WARN_ON(!link_sta)) 5155 goto out_err; 5156 5157 if (!link->u.mgd.have_beacon) { 5158 const struct cfg80211_bss_ies *ies; 5159 5160 rcu_read_lock(); 5161 ies = rcu_dereference(cbss->beacon_ies); 5162 if (ies) 5163 link->u.mgd.have_beacon = true; 5164 else 5165 ies = rcu_dereference(cbss->ies); 5166 ieee80211_get_dtim(ies, 5167 &link->conf->sync_dtim_count, 5168 &link->u.mgd.dtim_period); 5169 link->conf->beacon_int = cbss->beacon_interval; 5170 rcu_read_unlock(); 5171 } 5172 5173 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5174 5175 if (link_id != assoc_data->assoc_link_id) { 5176 err = ieee80211_prep_channel(sdata, link, cbss, true, 5177 &link->u.mgd.conn_flags); 5178 if (err) { 5179 link_info(link, "prep_channel failed\n"); 5180 goto out_err; 5181 } 5182 } 5183 5184 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5185 assoc_data->link[link_id].bss); 5186 if (err) 5187 goto out_err; 5188 5189 if (!ieee80211_assoc_config_link(link, link_sta, 5190 assoc_data->link[link_id].bss, 5191 mgmt, elem_start, elem_len, 5192 &changed[link_id])) 5193 goto out_err; 5194 5195 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5196 valid_links &= ~BIT(link_id); 5197 ieee80211_sta_remove_link(sta, link_id); 5198 continue; 5199 } 5200 5201 if (link_id != assoc_data->assoc_link_id) { 5202 err = ieee80211_sta_activate_link(sta, link_id); 5203 if (err) 5204 goto out_err; 5205 } 5206 } 5207 5208 /* links might have changed due to rejected ones, set them again */ 5209 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5210 5211 rate_control_rate_init(sta); 5212 5213 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5214 set_sta_flag(sta, WLAN_STA_MFP); 5215 sta->sta.mfp = true; 5216 } else { 5217 sta->sta.mfp = false; 5218 } 5219 5220 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5221 elems->ext_capab_len); 5222 5223 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5224 local->hw.queues >= IEEE80211_NUM_ACS; 5225 5226 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5227 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5228 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5229 if (err) { 5230 sdata_info(sdata, 5231 "failed to move station %pM to desired state\n", 5232 sta->sta.addr); 5233 WARN_ON(__sta_info_destroy(sta)); 5234 goto out_err; 5235 } 5236 5237 if (sdata->wdev.use_4addr) 5238 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5239 5240 ieee80211_set_associated(sdata, assoc_data, changed); 5241 5242 /* 5243 * If we're using 4-addr mode, let the AP know that we're 5244 * doing so, so that it can create the STA VLAN on its side 5245 */ 5246 if (ifmgd->use_4addr) 5247 ieee80211_send_4addr_nullfunc(local, sdata); 5248 5249 /* 5250 * Start timer to probe the connection to the AP now. 5251 * Also start the timer that will detect beacon loss. 5252 */ 5253 ieee80211_sta_reset_beacon_monitor(sdata); 5254 ieee80211_sta_reset_conn_monitor(sdata); 5255 5256 return true; 5257 out_err: 5258 eth_zero_addr(sdata->vif.cfg.ap_addr); 5259 return false; 5260 } 5261 5262 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5263 struct ieee80211_mgmt *mgmt, 5264 size_t len) 5265 { 5266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5267 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5268 u16 capab_info, status_code, aid; 5269 struct ieee80211_elems_parse_params parse_params = { 5270 .bss = NULL, 5271 .link_id = -1, 5272 .from_ap = true, 5273 }; 5274 struct ieee802_11_elems *elems; 5275 int ac; 5276 const u8 *elem_start; 5277 unsigned int elem_len; 5278 bool reassoc; 5279 struct ieee80211_event event = { 5280 .type = MLME_EVENT, 5281 .u.mlme.data = ASSOC_EVENT, 5282 }; 5283 struct ieee80211_prep_tx_info info = {}; 5284 struct cfg80211_rx_assoc_resp_data resp = { 5285 .uapsd_queues = -1, 5286 }; 5287 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5288 unsigned int link_id; 5289 5290 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5291 5292 if (!assoc_data) 5293 return; 5294 5295 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5296 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5297 return; 5298 5299 /* 5300 * AssocResp and ReassocResp have identical structure, so process both 5301 * of them in this function. 5302 */ 5303 5304 if (len < 24 + 6) 5305 return; 5306 5307 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5308 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5309 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5310 if (assoc_data->s1g) 5311 elem_start = mgmt->u.s1g_assoc_resp.variable; 5312 else 5313 elem_start = mgmt->u.assoc_resp.variable; 5314 5315 /* 5316 * Note: this may not be perfect, AP might misbehave - if 5317 * anyone needs to rely on perfect complete notification 5318 * with the exact right subtype, then we need to track what 5319 * we actually transmitted. 5320 */ 5321 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5322 IEEE80211_STYPE_ASSOC_REQ; 5323 5324 if (assoc_data->fils_kek_len && 5325 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5326 return; 5327 5328 elem_len = len - (elem_start - (u8 *)mgmt); 5329 parse_params.start = elem_start; 5330 parse_params.len = elem_len; 5331 elems = ieee802_11_parse_elems_full(&parse_params); 5332 if (!elems) 5333 goto notify_driver; 5334 5335 if (elems->aid_resp) 5336 aid = le16_to_cpu(elems->aid_resp->aid); 5337 else if (assoc_data->s1g) 5338 aid = 0; /* TODO */ 5339 else 5340 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5341 5342 /* 5343 * The 5 MSB of the AID field are reserved 5344 * (802.11-2016 9.4.1.8 AID field) 5345 */ 5346 aid &= 0x7ff; 5347 5348 sdata_info(sdata, 5349 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5350 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5351 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5352 5353 ifmgd->broken_ap = false; 5354 5355 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5356 elems->timeout_int && 5357 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5358 u32 tu, ms; 5359 5360 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5361 le32_to_cpu(elems->timeout_int->value)); 5362 5363 tu = le32_to_cpu(elems->timeout_int->value); 5364 ms = tu * 1024 / 1000; 5365 sdata_info(sdata, 5366 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5367 assoc_data->ap_addr, tu, ms); 5368 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5369 assoc_data->timeout_started = true; 5370 if (ms > IEEE80211_ASSOC_TIMEOUT) 5371 run_again(sdata, assoc_data->timeout); 5372 goto notify_driver; 5373 } 5374 5375 if (status_code != WLAN_STATUS_SUCCESS) { 5376 sdata_info(sdata, "%pM denied association (code=%d)\n", 5377 assoc_data->ap_addr, status_code); 5378 event.u.mlme.status = MLME_DENIED; 5379 event.u.mlme.reason = status_code; 5380 drv_event_callback(sdata->local, sdata, &event); 5381 } else { 5382 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5383 sdata_info(sdata, 5384 "invalid AID value %d (out of range), turn off PS\n", 5385 aid); 5386 aid = 0; 5387 ifmgd->broken_ap = true; 5388 } 5389 5390 if (ieee80211_vif_is_mld(&sdata->vif)) { 5391 if (!elems->ml_basic) { 5392 sdata_info(sdata, 5393 "MLO association with %pM but no multi-link element in response!\n", 5394 assoc_data->ap_addr); 5395 goto abandon_assoc; 5396 } 5397 5398 if (le16_get_bits(elems->ml_basic->control, 5399 IEEE80211_ML_CONTROL_TYPE) != 5400 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5401 sdata_info(sdata, 5402 "bad multi-link element (control=0x%x)\n", 5403 le16_to_cpu(elems->ml_basic->control)); 5404 goto abandon_assoc; 5405 } else { 5406 struct ieee80211_mle_basic_common_info *common; 5407 5408 common = (void *)elems->ml_basic->variable; 5409 5410 if (memcmp(assoc_data->ap_addr, 5411 common->mld_mac_addr, ETH_ALEN)) { 5412 sdata_info(sdata, 5413 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5414 common->mld_mac_addr, 5415 assoc_data->ap_addr); 5416 goto abandon_assoc; 5417 } 5418 } 5419 } 5420 5421 sdata->vif.cfg.aid = aid; 5422 5423 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5424 elem_start, elem_len)) { 5425 /* oops -- internal error -- send timeout for now */ 5426 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5427 goto notify_driver; 5428 } 5429 event.u.mlme.status = MLME_SUCCESS; 5430 drv_event_callback(sdata->local, sdata, &event); 5431 sdata_info(sdata, "associated\n"); 5432 5433 info.success = 1; 5434 } 5435 5436 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5437 struct ieee80211_link_data *link; 5438 5439 if (!assoc_data->link[link_id].bss) 5440 continue; 5441 5442 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5443 ether_addr_copy(resp.links[link_id].addr, 5444 assoc_data->link[link_id].addr); 5445 resp.links[link_id].status = assoc_data->link[link_id].status; 5446 5447 link = sdata_dereference(sdata->link[link_id], sdata); 5448 if (!link) 5449 continue; 5450 5451 /* get uapsd queues configuration - same for all links */ 5452 resp.uapsd_queues = 0; 5453 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5454 if (link->tx_conf[ac].uapsd) 5455 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5456 } 5457 5458 if (ieee80211_vif_is_mld(&sdata->vif)) { 5459 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5460 resp.ap_mld_addr = ap_mld_addr; 5461 } 5462 5463 ieee80211_destroy_assoc_data(sdata, 5464 status_code == WLAN_STATUS_SUCCESS ? 5465 ASSOC_SUCCESS : 5466 ASSOC_REJECTED); 5467 5468 resp.buf = (u8 *)mgmt; 5469 resp.len = len; 5470 resp.req_ies = ifmgd->assoc_req_ies; 5471 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5472 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5473 notify_driver: 5474 drv_mgd_complete_tx(sdata->local, sdata, &info); 5475 kfree(elems); 5476 return; 5477 abandon_assoc: 5478 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5479 goto notify_driver; 5480 } 5481 5482 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5483 struct ieee80211_mgmt *mgmt, size_t len, 5484 struct ieee80211_rx_status *rx_status) 5485 { 5486 struct ieee80211_sub_if_data *sdata = link->sdata; 5487 struct ieee80211_local *local = sdata->local; 5488 struct ieee80211_bss *bss; 5489 struct ieee80211_channel *channel; 5490 5491 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5492 5493 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5494 ieee80211_rx_status_to_khz(rx_status)); 5495 if (!channel) 5496 return; 5497 5498 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5499 if (bss) { 5500 link->conf->beacon_rate = bss->beacon_rate; 5501 ieee80211_rx_bss_put(local, bss); 5502 } 5503 } 5504 5505 5506 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5507 struct sk_buff *skb) 5508 { 5509 struct ieee80211_sub_if_data *sdata = link->sdata; 5510 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5511 struct ieee80211_if_managed *ifmgd; 5512 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5513 struct ieee80211_channel *channel; 5514 size_t baselen, len = skb->len; 5515 5516 ifmgd = &sdata->u.mgd; 5517 5518 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5519 5520 /* 5521 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5522 * "If a 6 GHz AP receives a Probe Request frame and responds with 5523 * a Probe Response frame [..], the Address 1 field of the Probe 5524 * Response frame shall be set to the broadcast address [..]" 5525 * So, on 6GHz band we should also accept broadcast responses. 5526 */ 5527 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5528 rx_status->freq); 5529 if (!channel) 5530 return; 5531 5532 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5533 (channel->band != NL80211_BAND_6GHZ || 5534 !is_broadcast_ether_addr(mgmt->da))) 5535 return; /* ignore ProbeResp to foreign address */ 5536 5537 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5538 if (baselen > len) 5539 return; 5540 5541 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5542 5543 if (ifmgd->associated && 5544 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5545 ieee80211_reset_ap_probe(sdata); 5546 } 5547 5548 /* 5549 * This is the canonical list of information elements we care about, 5550 * the filter code also gives us all changes to the Microsoft OUI 5551 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5552 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5553 * changes to requested client power. 5554 * 5555 * We implement beacon filtering in software since that means we can 5556 * avoid processing the frame here and in cfg80211, and userspace 5557 * will not be able to tell whether the hardware supports it or not. 5558 * 5559 * XXX: This list needs to be dynamic -- userspace needs to be able to 5560 * add items it requires. It also needs to be able to tell us to 5561 * look out for other vendor IEs. 5562 */ 5563 static const u64 care_about_ies = 5564 (1ULL << WLAN_EID_COUNTRY) | 5565 (1ULL << WLAN_EID_ERP_INFO) | 5566 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5567 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5568 (1ULL << WLAN_EID_HT_CAPABILITY) | 5569 (1ULL << WLAN_EID_HT_OPERATION) | 5570 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5571 5572 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5573 struct ieee80211_if_managed *ifmgd, 5574 struct ieee80211_bss_conf *bss_conf, 5575 struct ieee80211_local *local, 5576 struct ieee80211_rx_status *rx_status) 5577 { 5578 struct ieee80211_sub_if_data *sdata = link->sdata; 5579 5580 /* Track average RSSI from the Beacon frames of the current AP */ 5581 5582 if (!link->u.mgd.tracking_signal_avg) { 5583 link->u.mgd.tracking_signal_avg = true; 5584 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5585 link->u.mgd.last_cqm_event_signal = 0; 5586 link->u.mgd.count_beacon_signal = 1; 5587 link->u.mgd.last_ave_beacon_signal = 0; 5588 } else { 5589 link->u.mgd.count_beacon_signal++; 5590 } 5591 5592 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5593 -rx_status->signal); 5594 5595 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5596 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5597 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5598 int last_sig = link->u.mgd.last_ave_beacon_signal; 5599 struct ieee80211_event event = { 5600 .type = RSSI_EVENT, 5601 }; 5602 5603 /* 5604 * if signal crosses either of the boundaries, invoke callback 5605 * with appropriate parameters 5606 */ 5607 if (sig > ifmgd->rssi_max_thold && 5608 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5609 link->u.mgd.last_ave_beacon_signal = sig; 5610 event.u.rssi.data = RSSI_EVENT_HIGH; 5611 drv_event_callback(local, sdata, &event); 5612 } else if (sig < ifmgd->rssi_min_thold && 5613 (last_sig >= ifmgd->rssi_max_thold || 5614 last_sig == 0)) { 5615 link->u.mgd.last_ave_beacon_signal = sig; 5616 event.u.rssi.data = RSSI_EVENT_LOW; 5617 drv_event_callback(local, sdata, &event); 5618 } 5619 } 5620 5621 if (bss_conf->cqm_rssi_thold && 5622 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5623 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5624 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5625 int last_event = link->u.mgd.last_cqm_event_signal; 5626 int thold = bss_conf->cqm_rssi_thold; 5627 int hyst = bss_conf->cqm_rssi_hyst; 5628 5629 if (sig < thold && 5630 (last_event == 0 || sig < last_event - hyst)) { 5631 link->u.mgd.last_cqm_event_signal = sig; 5632 ieee80211_cqm_rssi_notify( 5633 &sdata->vif, 5634 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5635 sig, GFP_KERNEL); 5636 } else if (sig > thold && 5637 (last_event == 0 || sig > last_event + hyst)) { 5638 link->u.mgd.last_cqm_event_signal = sig; 5639 ieee80211_cqm_rssi_notify( 5640 &sdata->vif, 5641 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5642 sig, GFP_KERNEL); 5643 } 5644 } 5645 5646 if (bss_conf->cqm_rssi_low && 5647 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5648 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5649 int last_event = link->u.mgd.last_cqm_event_signal; 5650 int low = bss_conf->cqm_rssi_low; 5651 int high = bss_conf->cqm_rssi_high; 5652 5653 if (sig < low && 5654 (last_event == 0 || last_event >= low)) { 5655 link->u.mgd.last_cqm_event_signal = sig; 5656 ieee80211_cqm_rssi_notify( 5657 &sdata->vif, 5658 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5659 sig, GFP_KERNEL); 5660 } else if (sig > high && 5661 (last_event == 0 || last_event <= high)) { 5662 link->u.mgd.last_cqm_event_signal = sig; 5663 ieee80211_cqm_rssi_notify( 5664 &sdata->vif, 5665 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5666 sig, GFP_KERNEL); 5667 } 5668 } 5669 } 5670 5671 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5672 struct cfg80211_bss *bss) 5673 { 5674 if (ether_addr_equal(tx_bssid, bss->bssid)) 5675 return true; 5676 if (!bss->transmitted_bss) 5677 return false; 5678 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5679 } 5680 5681 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5682 const struct ieee80211_eht_operation *eht_oper, 5683 u64 *changed) 5684 { 5685 u16 bitmap = 0, extracted; 5686 5687 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5688 (eht_oper->params & 5689 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5690 const struct ieee80211_eht_operation_info *info = 5691 (void *)eht_oper->optional; 5692 const u8 *disable_subchannel_bitmap = info->optional; 5693 5694 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5695 } 5696 5697 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5698 &link->conf->chandef, 5699 bitmap); 5700 5701 /* accept if there are no changes */ 5702 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5703 extracted == link->conf->eht_puncturing) 5704 return true; 5705 5706 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5707 &link->conf->chandef)) { 5708 link_info(link, 5709 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5710 link->u.mgd.bssid, 5711 bitmap, 5712 link->conf->chandef.width); 5713 return false; 5714 } 5715 5716 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5717 return true; 5718 } 5719 5720 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5721 struct wiphy_work *work) 5722 { 5723 struct ieee80211_sub_if_data *sdata = 5724 container_of(work, struct ieee80211_sub_if_data, 5725 u.mgd.ml_reconf_work.work); 5726 u16 new_valid_links, new_active_links, new_dormant_links; 5727 int ret; 5728 5729 if (!sdata->u.mgd.removed_links) 5730 return; 5731 5732 sdata_info(sdata, 5733 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5734 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5735 5736 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5737 if (new_valid_links == sdata->vif.valid_links) 5738 return; 5739 5740 if (!new_valid_links || 5741 !(new_valid_links & ~sdata->vif.dormant_links)) { 5742 sdata_info(sdata, "No valid links after reconfiguration\n"); 5743 ret = -EINVAL; 5744 goto out; 5745 } 5746 5747 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5748 if (new_active_links != sdata->vif.active_links) { 5749 if (!new_active_links) 5750 new_active_links = 5751 BIT(ffs(new_valid_links & 5752 ~sdata->vif.dormant_links) - 1); 5753 5754 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 5755 if (ret) { 5756 sdata_info(sdata, 5757 "Failed setting active links\n"); 5758 goto out; 5759 } 5760 } 5761 5762 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 5763 5764 ret = ieee80211_vif_set_links(sdata, new_valid_links, 5765 new_dormant_links); 5766 if (ret) 5767 sdata_info(sdata, "Failed setting valid links\n"); 5768 5769 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 5770 5771 out: 5772 if (!ret) 5773 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5774 else 5775 __ieee80211_disconnect(sdata); 5776 5777 sdata->u.mgd.removed_links = 0; 5778 } 5779 5780 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5781 struct ieee802_11_elems *elems) 5782 { 5783 const struct ieee80211_multi_link_elem *ml; 5784 const struct element *sub; 5785 size_t ml_len; 5786 unsigned long removed_links = 0; 5787 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5788 u8 link_id; 5789 u32 delay; 5790 5791 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5792 return; 5793 5794 ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, 5795 elems->ie_start, 5796 elems->total_len, 5797 elems->scratch_pos, 5798 elems->scratch + elems->scratch_len - 5799 elems->scratch_pos, 5800 WLAN_EID_FRAGMENT); 5801 5802 elems->ml_reconf = (const void *)elems->scratch_pos; 5803 elems->ml_reconf_len = ml_len; 5804 ml = elems->ml_reconf; 5805 5806 /* Directly parse the sub elements as the common information doesn't 5807 * hold any useful information. 5808 */ 5809 for_each_mle_subelement(sub, (u8 *)ml, ml_len) { 5810 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 5811 u8 *pos = prof->variable; 5812 u16 control; 5813 5814 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 5815 continue; 5816 5817 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 5818 sub->datalen)) 5819 return; 5820 5821 control = le16_to_cpu(prof->control); 5822 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 5823 5824 removed_links |= BIT(link_id); 5825 5826 /* the MAC address should not be included, but handle it */ 5827 if (control & 5828 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 5829 pos += 6; 5830 5831 /* According to Draft P802.11be_D3.0, the control should 5832 * include the AP Removal Timer present. If the AP Removal Timer 5833 * is not present assume immediate removal. 5834 */ 5835 if (control & 5836 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 5837 link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos); 5838 } 5839 5840 removed_links &= sdata->vif.valid_links; 5841 if (!removed_links) { 5842 /* In case the removal was cancelled, abort it */ 5843 if (sdata->u.mgd.removed_links) { 5844 sdata->u.mgd.removed_links = 0; 5845 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5846 &sdata->u.mgd.ml_reconf_work); 5847 } 5848 return; 5849 } 5850 5851 delay = 0; 5852 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 5853 struct ieee80211_bss_conf *link_conf = 5854 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 5855 u32 link_delay; 5856 5857 if (!link_conf) { 5858 removed_links &= ~BIT(link_id); 5859 continue; 5860 } 5861 5862 link_delay = link_conf->beacon_int * 5863 link_removal_timeout[link_id]; 5864 5865 if (!delay) 5866 delay = link_delay; 5867 else 5868 delay = min(delay, link_delay); 5869 } 5870 5871 sdata->u.mgd.removed_links = removed_links; 5872 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 5873 &sdata->u.mgd.ml_reconf_work, 5874 TU_TO_JIFFIES(delay)); 5875 } 5876 5877 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 5878 struct wiphy_work *work) 5879 { 5880 u16 new_active_links, new_dormant_links; 5881 struct ieee80211_sub_if_data *sdata = 5882 container_of(work, struct ieee80211_sub_if_data, 5883 u.mgd.ttlm_work.work); 5884 int ret; 5885 5886 new_active_links = sdata->u.mgd.ttlm_info.map & 5887 sdata->vif.valid_links; 5888 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 5889 sdata->vif.valid_links; 5890 if (!new_active_links) { 5891 ieee80211_disconnect(&sdata->vif, false); 5892 return; 5893 } 5894 5895 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 5896 new_active_links = BIT(ffs(new_active_links) - 1); 5897 ieee80211_set_active_links(&sdata->vif, new_active_links); 5898 5899 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 5900 new_dormant_links); 5901 5902 sdata->u.mgd.ttlm_info.active = true; 5903 sdata->u.mgd.ttlm_info.switch_time = 0; 5904 5905 if (!ret) 5906 ieee80211_vif_cfg_change_notify(sdata, 5907 BSS_CHANGED_MLD_VALID_LINKS); 5908 } 5909 5910 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 5911 { 5912 if (bm_size == 1) 5913 return *data; 5914 else 5915 return get_unaligned_le16(data); 5916 } 5917 5918 static int 5919 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 5920 const struct ieee80211_ttlm_elem *ttlm, 5921 struct ieee80211_adv_ttlm_info *ttlm_info) 5922 { 5923 /* The element size was already validated in 5924 * ieee80211_tid_to_link_map_size_ok() 5925 */ 5926 u8 control, link_map_presence, map_size, tid; 5927 u8 *pos; 5928 5929 memset(ttlm_info, 0, sizeof(*ttlm_info)); 5930 pos = (void *)ttlm->optional; 5931 control = ttlm->control; 5932 5933 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 5934 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 5935 return 0; 5936 5937 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 5938 IEEE80211_TTLM_DIRECTION_BOTH) { 5939 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 5940 return -EINVAL; 5941 } 5942 5943 link_map_presence = *pos; 5944 pos++; 5945 5946 ttlm_info->switch_time = get_unaligned_le16(pos); 5947 pos += 2; 5948 5949 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 5950 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 5951 pos += 3; 5952 } 5953 5954 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 5955 map_size = 1; 5956 else 5957 map_size = 2; 5958 5959 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 5960 * not advertise a TID-to-link mapping that does not map all TIDs to the 5961 * same link set, reject frame if not all links have mapping 5962 */ 5963 if (link_map_presence != 0xff) { 5964 sdata_info(sdata, 5965 "Invalid advertised T2L mapping presence indicator\n"); 5966 return -EINVAL; 5967 } 5968 5969 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 5970 if (!ttlm_info->map) { 5971 sdata_info(sdata, 5972 "Invalid advertised T2L map for TID 0\n"); 5973 return -EINVAL; 5974 } 5975 5976 pos += map_size; 5977 5978 for (tid = 1; tid < 8; tid++) { 5979 u16 map = ieee80211_get_ttlm(map_size, pos); 5980 5981 if (map != ttlm_info->map) { 5982 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 5983 tid); 5984 return -EINVAL; 5985 } 5986 5987 pos += map_size; 5988 } 5989 return 0; 5990 } 5991 5992 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 5993 struct ieee802_11_elems *elems, 5994 u64 beacon_ts) 5995 { 5996 u8 i; 5997 int ret; 5998 5999 if (!ieee80211_vif_is_mld(&sdata->vif)) 6000 return; 6001 6002 if (!elems->ttlm_num) { 6003 if (sdata->u.mgd.ttlm_info.switch_time) { 6004 /* if a planned TID-to-link mapping was cancelled - 6005 * abort it 6006 */ 6007 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6008 &sdata->u.mgd.ttlm_work); 6009 } else if (sdata->u.mgd.ttlm_info.active) { 6010 /* if no TID-to-link element, set to default mapping in 6011 * which all TIDs are mapped to all setup links 6012 */ 6013 ret = ieee80211_vif_set_links(sdata, 6014 sdata->vif.valid_links, 6015 0); 6016 if (ret) { 6017 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6018 return; 6019 } 6020 ieee80211_vif_cfg_change_notify(sdata, 6021 BSS_CHANGED_MLD_VALID_LINKS); 6022 } 6023 memset(&sdata->u.mgd.ttlm_info, 0, 6024 sizeof(sdata->u.mgd.ttlm_info)); 6025 return; 6026 } 6027 6028 for (i = 0; i < elems->ttlm_num; i++) { 6029 struct ieee80211_adv_ttlm_info ttlm_info; 6030 u32 res; 6031 6032 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6033 &ttlm_info); 6034 6035 if (res) { 6036 __ieee80211_disconnect(sdata); 6037 return; 6038 } 6039 6040 if (ttlm_info.switch_time) { 6041 u32 st_us, delay = 0; 6042 u32 ts_l26 = beacon_ts & GENMASK(25, 0); 6043 6044 /* The t2l map switch time is indicated with a partial 6045 * TSF value, convert it to TSF and calc the delay 6046 * to the start time. 6047 */ 6048 st_us = ieee80211_tu_to_usec(ttlm_info.switch_time); 6049 if (st_us > ts_l26) 6050 delay = st_us - ts_l26; 6051 else 6052 continue; 6053 6054 sdata->u.mgd.ttlm_info = ttlm_info; 6055 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6056 &sdata->u.mgd.ttlm_work); 6057 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6058 &sdata->u.mgd.ttlm_work, 6059 usecs_to_jiffies(delay)); 6060 return; 6061 } 6062 } 6063 } 6064 6065 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6066 struct ieee80211_hdr *hdr, size_t len, 6067 struct ieee80211_rx_status *rx_status) 6068 { 6069 struct ieee80211_sub_if_data *sdata = link->sdata; 6070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6071 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6072 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6073 struct ieee80211_mgmt *mgmt = (void *) hdr; 6074 size_t baselen; 6075 struct ieee802_11_elems *elems; 6076 struct ieee80211_local *local = sdata->local; 6077 struct ieee80211_chanctx_conf *chanctx_conf; 6078 struct ieee80211_supported_band *sband; 6079 struct ieee80211_channel *chan; 6080 struct link_sta_info *link_sta; 6081 struct sta_info *sta; 6082 u64 changed = 0; 6083 bool erp_valid; 6084 u8 erp_value = 0; 6085 u32 ncrc = 0; 6086 u8 *bssid, *variable = mgmt->u.beacon.variable; 6087 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6088 struct ieee80211_elems_parse_params parse_params = { 6089 .link_id = -1, 6090 .from_ap = true, 6091 }; 6092 6093 lockdep_assert_wiphy(local->hw.wiphy); 6094 6095 /* Process beacon from the current BSS */ 6096 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6097 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6098 struct ieee80211_ext *ext = (void *) mgmt; 6099 6100 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6101 variable = ext->u.s1g_short_beacon.variable; 6102 else 6103 variable = ext->u.s1g_beacon.variable; 6104 } 6105 6106 baselen = (u8 *) variable - (u8 *) mgmt; 6107 if (baselen > len) 6108 return; 6109 6110 parse_params.start = variable; 6111 parse_params.len = len - baselen; 6112 6113 rcu_read_lock(); 6114 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6115 if (!chanctx_conf) { 6116 rcu_read_unlock(); 6117 return; 6118 } 6119 6120 if (ieee80211_rx_status_to_khz(rx_status) != 6121 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6122 rcu_read_unlock(); 6123 return; 6124 } 6125 chan = chanctx_conf->def.chan; 6126 rcu_read_unlock(); 6127 6128 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6129 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6130 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6131 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6132 elems = ieee802_11_parse_elems_full(&parse_params); 6133 if (!elems) 6134 return; 6135 6136 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6137 6138 if (elems->dtim_period) 6139 link->u.mgd.dtim_period = elems->dtim_period; 6140 link->u.mgd.have_beacon = true; 6141 ifmgd->assoc_data->need_beacon = false; 6142 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6143 link->conf->sync_tsf = 6144 le64_to_cpu(mgmt->u.beacon.timestamp); 6145 link->conf->sync_device_ts = 6146 rx_status->device_timestamp; 6147 link->conf->sync_dtim_count = elems->dtim_count; 6148 } 6149 6150 if (elems->mbssid_config_ie) 6151 bss_conf->profile_periodicity = 6152 elems->mbssid_config_ie->profile_periodicity; 6153 else 6154 bss_conf->profile_periodicity = 0; 6155 6156 if (elems->ext_capab_len >= 11 && 6157 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6158 bss_conf->ema_ap = true; 6159 else 6160 bss_conf->ema_ap = false; 6161 6162 /* continue assoc process */ 6163 ifmgd->assoc_data->timeout = jiffies; 6164 ifmgd->assoc_data->timeout_started = true; 6165 run_again(sdata, ifmgd->assoc_data->timeout); 6166 kfree(elems); 6167 return; 6168 } 6169 6170 if (!ifmgd->associated || 6171 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 6172 return; 6173 bssid = link->u.mgd.bssid; 6174 6175 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6176 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6177 local, rx_status); 6178 6179 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6180 mlme_dbg_ratelimited(sdata, 6181 "cancelling AP probe due to a received beacon\n"); 6182 ieee80211_reset_ap_probe(sdata); 6183 } 6184 6185 /* 6186 * Push the beacon loss detection into the future since 6187 * we are processing a beacon from the AP just now. 6188 */ 6189 ieee80211_sta_reset_beacon_monitor(sdata); 6190 6191 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6192 * element (which carries the beacon interval). Don't forget to add a 6193 * bit to care_about_ies[] above if mac80211 is interested in a 6194 * changing S1G element. 6195 */ 6196 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6197 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6198 parse_params.bss = link->u.mgd.bss; 6199 parse_params.filter = care_about_ies; 6200 parse_params.crc = ncrc; 6201 elems = ieee802_11_parse_elems_full(&parse_params); 6202 if (!elems) 6203 return; 6204 ncrc = elems->crc; 6205 6206 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6207 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6208 if (local->hw.conf.dynamic_ps_timeout > 0) { 6209 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6210 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6211 ieee80211_hw_config(local, 6212 IEEE80211_CONF_CHANGE_PS); 6213 } 6214 ieee80211_send_nullfunc(local, sdata, false); 6215 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6216 local->pspolling = true; 6217 6218 /* 6219 * Here is assumed that the driver will be 6220 * able to send ps-poll frame and receive a 6221 * response even though power save mode is 6222 * enabled, but some drivers might require 6223 * to disable power save here. This needs 6224 * to be investigated. 6225 */ 6226 ieee80211_send_pspoll(local, sdata); 6227 } 6228 } 6229 6230 if (sdata->vif.p2p || 6231 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6232 struct ieee80211_p2p_noa_attr noa = {}; 6233 int ret; 6234 6235 ret = cfg80211_get_p2p_attr(variable, 6236 len - baselen, 6237 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6238 (u8 *) &noa, sizeof(noa)); 6239 if (ret >= 2) { 6240 if (link->u.mgd.p2p_noa_index != noa.index) { 6241 /* valid noa_attr and index changed */ 6242 link->u.mgd.p2p_noa_index = noa.index; 6243 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6244 changed |= BSS_CHANGED_P2P_PS; 6245 /* 6246 * make sure we update all information, the CRC 6247 * mechanism doesn't look at P2P attributes. 6248 */ 6249 link->u.mgd.beacon_crc_valid = false; 6250 } 6251 } else if (link->u.mgd.p2p_noa_index != -1) { 6252 /* noa_attr not found and we had valid noa_attr before */ 6253 link->u.mgd.p2p_noa_index = -1; 6254 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6255 changed |= BSS_CHANGED_P2P_PS; 6256 link->u.mgd.beacon_crc_valid = false; 6257 } 6258 } 6259 6260 if (link->u.mgd.csa_waiting_bcn) 6261 ieee80211_chswitch_post_beacon(link); 6262 6263 /* 6264 * Update beacon timing and dtim count on every beacon appearance. This 6265 * will allow the driver to use the most updated values. Do it before 6266 * comparing this one with last received beacon. 6267 * IMPORTANT: These parameters would possibly be out of sync by the time 6268 * the driver will use them. The synchronized view is currently 6269 * guaranteed only in certain callbacks. 6270 */ 6271 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6272 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6273 link->conf->sync_tsf = 6274 le64_to_cpu(mgmt->u.beacon.timestamp); 6275 link->conf->sync_device_ts = 6276 rx_status->device_timestamp; 6277 link->conf->sync_dtim_count = elems->dtim_count; 6278 } 6279 6280 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6281 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6282 goto free; 6283 link->u.mgd.beacon_crc = ncrc; 6284 link->u.mgd.beacon_crc_valid = true; 6285 6286 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6287 6288 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6289 rx_status->device_timestamp, 6290 elems, true); 6291 6292 if (!link->u.mgd.disable_wmm_tracking && 6293 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6294 elems->wmm_param_len, 6295 elems->mu_edca_param_set)) 6296 changed |= BSS_CHANGED_QOS; 6297 6298 /* 6299 * If we haven't had a beacon before, tell the driver about the 6300 * DTIM period (and beacon timing if desired) now. 6301 */ 6302 if (!link->u.mgd.have_beacon) { 6303 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6304 bss_conf->dtim_period = elems->dtim_period ?: 1; 6305 6306 changed |= BSS_CHANGED_BEACON_INFO; 6307 link->u.mgd.have_beacon = true; 6308 6309 ieee80211_recalc_ps(local); 6310 6311 ieee80211_recalc_ps_vif(sdata); 6312 } 6313 6314 if (elems->erp_info) { 6315 erp_valid = true; 6316 erp_value = elems->erp_info[0]; 6317 } else { 6318 erp_valid = false; 6319 } 6320 6321 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6322 changed |= ieee80211_handle_bss_capability(link, 6323 le16_to_cpu(mgmt->u.beacon.capab_info), 6324 erp_valid, erp_value); 6325 6326 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6327 if (WARN_ON(!sta)) { 6328 goto free; 6329 } 6330 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6331 lockdep_is_held(&local->hw.wiphy->mtx)); 6332 if (WARN_ON(!link_sta)) { 6333 goto free; 6334 } 6335 6336 if (WARN_ON(!link->conf->chandef.chan)) 6337 goto free; 6338 6339 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 6340 6341 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6342 6343 if (ieee80211_config_bw(link, elems->ht_cap_elem, 6344 elems->vht_cap_elem, elems->ht_operation, 6345 elems->vht_operation, elems->he_operation, 6346 elems->eht_operation, 6347 elems->s1g_oper, bssid, &changed)) { 6348 sdata_info(sdata, 6349 "failed to follow AP %pM bandwidth change, disconnect\n", 6350 bssid); 6351 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6352 WLAN_REASON_DEAUTH_LEAVING, 6353 true, deauth_buf); 6354 ieee80211_report_disconnect(sdata, deauth_buf, 6355 sizeof(deauth_buf), true, 6356 WLAN_REASON_DEAUTH_LEAVING, 6357 false); 6358 goto free; 6359 } 6360 6361 if (elems->opmode_notif) 6362 ieee80211_vht_handle_opmode(sdata, link_sta, 6363 *elems->opmode_notif, 6364 rx_status->band); 6365 6366 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6367 elems->country_elem, 6368 elems->country_elem_len, 6369 elems->pwr_constr_elem, 6370 elems->cisco_dtpc_elem); 6371 6372 if (elems->eht_operation && 6373 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 6374 if (!ieee80211_config_puncturing(link, elems->eht_operation, 6375 &changed)) { 6376 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6377 WLAN_REASON_DEAUTH_LEAVING, 6378 true, deauth_buf); 6379 ieee80211_report_disconnect(sdata, deauth_buf, 6380 sizeof(deauth_buf), true, 6381 WLAN_REASON_DEAUTH_LEAVING, 6382 false); 6383 goto free; 6384 } 6385 } 6386 6387 ieee80211_ml_reconfiguration(sdata, elems); 6388 ieee80211_process_adv_ttlm(sdata, elems, 6389 le64_to_cpu(mgmt->u.beacon.timestamp)); 6390 6391 ieee80211_link_info_change_notify(sdata, link, changed); 6392 free: 6393 kfree(elems); 6394 } 6395 6396 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 6397 struct sk_buff *skb) 6398 { 6399 struct ieee80211_link_data *link = &sdata->deflink; 6400 struct ieee80211_rx_status *rx_status; 6401 struct ieee80211_hdr *hdr; 6402 u16 fc; 6403 6404 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6405 6406 rx_status = (struct ieee80211_rx_status *) skb->cb; 6407 hdr = (struct ieee80211_hdr *) skb->data; 6408 fc = le16_to_cpu(hdr->frame_control); 6409 6410 switch (fc & IEEE80211_FCTL_STYPE) { 6411 case IEEE80211_STYPE_S1G_BEACON: 6412 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 6413 break; 6414 } 6415 } 6416 6417 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 6418 struct sk_buff *skb) 6419 { 6420 struct ieee80211_link_data *link = &sdata->deflink; 6421 struct ieee80211_rx_status *rx_status; 6422 struct ieee80211_mgmt *mgmt; 6423 u16 fc; 6424 int ies_len; 6425 6426 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6427 6428 rx_status = (struct ieee80211_rx_status *) skb->cb; 6429 mgmt = (struct ieee80211_mgmt *) skb->data; 6430 fc = le16_to_cpu(mgmt->frame_control); 6431 6432 if (rx_status->link_valid) { 6433 link = sdata_dereference(sdata->link[rx_status->link_id], 6434 sdata); 6435 if (!link) 6436 return; 6437 } 6438 6439 switch (fc & IEEE80211_FCTL_STYPE) { 6440 case IEEE80211_STYPE_BEACON: 6441 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 6442 skb->len, rx_status); 6443 break; 6444 case IEEE80211_STYPE_PROBE_RESP: 6445 ieee80211_rx_mgmt_probe_resp(link, skb); 6446 break; 6447 case IEEE80211_STYPE_AUTH: 6448 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 6449 break; 6450 case IEEE80211_STYPE_DEAUTH: 6451 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6452 break; 6453 case IEEE80211_STYPE_DISASSOC: 6454 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6455 break; 6456 case IEEE80211_STYPE_ASSOC_RESP: 6457 case IEEE80211_STYPE_REASSOC_RESP: 6458 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6459 break; 6460 case IEEE80211_STYPE_ACTION: 6461 if (!sdata->u.mgd.associated || 6462 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 6463 break; 6464 6465 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6466 struct ieee802_11_elems *elems; 6467 6468 ies_len = skb->len - 6469 offsetof(struct ieee80211_mgmt, 6470 u.action.u.chan_switch.variable); 6471 6472 if (ies_len < 0) 6473 break; 6474 6475 /* CSA IE cannot be overridden, no need for BSSID */ 6476 elems = ieee802_11_parse_elems( 6477 mgmt->u.action.u.chan_switch.variable, 6478 ies_len, true, NULL); 6479 6480 if (elems && !elems->parse_error) 6481 ieee80211_sta_process_chanswitch(link, 6482 rx_status->mactime, 6483 rx_status->device_timestamp, 6484 elems, false); 6485 kfree(elems); 6486 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6487 struct ieee802_11_elems *elems; 6488 6489 ies_len = skb->len - 6490 offsetof(struct ieee80211_mgmt, 6491 u.action.u.ext_chan_switch.variable); 6492 6493 if (ies_len < 0) 6494 break; 6495 6496 /* 6497 * extended CSA IE can't be overridden, no need for 6498 * BSSID 6499 */ 6500 elems = ieee802_11_parse_elems( 6501 mgmt->u.action.u.ext_chan_switch.variable, 6502 ies_len, true, NULL); 6503 6504 if (elems && !elems->parse_error) { 6505 /* for the handling code pretend it was an IE */ 6506 elems->ext_chansw_ie = 6507 &mgmt->u.action.u.ext_chan_switch.data; 6508 6509 ieee80211_sta_process_chanswitch(link, 6510 rx_status->mactime, 6511 rx_status->device_timestamp, 6512 elems, false); 6513 } 6514 6515 kfree(elems); 6516 } 6517 break; 6518 } 6519 } 6520 6521 static void ieee80211_sta_timer(struct timer_list *t) 6522 { 6523 struct ieee80211_sub_if_data *sdata = 6524 from_timer(sdata, t, u.mgd.timer); 6525 6526 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6527 } 6528 6529 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6530 u8 reason, bool tx) 6531 { 6532 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6533 6534 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6535 tx, frame_buf); 6536 6537 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6538 reason, false); 6539 } 6540 6541 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6542 { 6543 struct ieee80211_local *local = sdata->local; 6544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6545 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6546 u32 tx_flags = 0; 6547 u16 trans = 1; 6548 u16 status = 0; 6549 struct ieee80211_prep_tx_info info = { 6550 .subtype = IEEE80211_STYPE_AUTH, 6551 }; 6552 6553 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6554 6555 if (WARN_ON_ONCE(!auth_data)) 6556 return -EINVAL; 6557 6558 auth_data->tries++; 6559 6560 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6561 sdata_info(sdata, "authentication with %pM timed out\n", 6562 auth_data->ap_addr); 6563 6564 /* 6565 * Most likely AP is not in the range so remove the 6566 * bss struct for that AP. 6567 */ 6568 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6569 6570 return -ETIMEDOUT; 6571 } 6572 6573 if (auth_data->algorithm == WLAN_AUTH_SAE) 6574 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6575 6576 info.link_id = auth_data->link_id; 6577 drv_mgd_prepare_tx(local, sdata, &info); 6578 6579 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6580 auth_data->ap_addr, auth_data->tries, 6581 IEEE80211_AUTH_MAX_TRIES); 6582 6583 auth_data->expected_transaction = 2; 6584 6585 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6586 trans = auth_data->sae_trans; 6587 status = auth_data->sae_status; 6588 auth_data->expected_transaction = trans; 6589 } 6590 6591 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6592 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6593 IEEE80211_TX_INTFL_MLME_CONN_TX; 6594 6595 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6596 auth_data->data, auth_data->data_len, 6597 auth_data->ap_addr, auth_data->ap_addr, 6598 NULL, 0, 0, tx_flags); 6599 6600 if (tx_flags == 0) { 6601 if (auth_data->algorithm == WLAN_AUTH_SAE) 6602 auth_data->timeout = jiffies + 6603 IEEE80211_AUTH_TIMEOUT_SAE; 6604 else 6605 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6606 } else { 6607 auth_data->timeout = 6608 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6609 } 6610 6611 auth_data->timeout_started = true; 6612 run_again(sdata, auth_data->timeout); 6613 6614 return 0; 6615 } 6616 6617 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6618 { 6619 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6620 struct ieee80211_local *local = sdata->local; 6621 int ret; 6622 6623 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6624 6625 assoc_data->tries++; 6626 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6627 sdata_info(sdata, "association with %pM timed out\n", 6628 assoc_data->ap_addr); 6629 6630 /* 6631 * Most likely AP is not in the range so remove the 6632 * bss struct for that AP. 6633 */ 6634 cfg80211_unlink_bss(local->hw.wiphy, 6635 assoc_data->link[assoc_data->assoc_link_id].bss); 6636 6637 return -ETIMEDOUT; 6638 } 6639 6640 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6641 assoc_data->ap_addr, assoc_data->tries, 6642 IEEE80211_ASSOC_MAX_TRIES); 6643 ret = ieee80211_send_assoc(sdata); 6644 if (ret) 6645 return ret; 6646 6647 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6648 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6649 assoc_data->timeout_started = true; 6650 run_again(sdata, assoc_data->timeout); 6651 } else { 6652 assoc_data->timeout = 6653 round_jiffies_up(jiffies + 6654 IEEE80211_ASSOC_TIMEOUT_LONG); 6655 assoc_data->timeout_started = true; 6656 run_again(sdata, assoc_data->timeout); 6657 } 6658 6659 return 0; 6660 } 6661 6662 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6663 __le16 fc, bool acked) 6664 { 6665 struct ieee80211_local *local = sdata->local; 6666 6667 sdata->u.mgd.status_fc = fc; 6668 sdata->u.mgd.status_acked = acked; 6669 sdata->u.mgd.status_received = true; 6670 6671 wiphy_work_queue(local->hw.wiphy, &sdata->work); 6672 } 6673 6674 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6675 { 6676 struct ieee80211_local *local = sdata->local; 6677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6678 6679 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6680 6681 if (ifmgd->status_received) { 6682 __le16 fc = ifmgd->status_fc; 6683 bool status_acked = ifmgd->status_acked; 6684 6685 ifmgd->status_received = false; 6686 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6687 if (status_acked) { 6688 if (ifmgd->auth_data->algorithm == 6689 WLAN_AUTH_SAE) 6690 ifmgd->auth_data->timeout = 6691 jiffies + 6692 IEEE80211_AUTH_TIMEOUT_SAE; 6693 else 6694 ifmgd->auth_data->timeout = 6695 jiffies + 6696 IEEE80211_AUTH_TIMEOUT_SHORT; 6697 run_again(sdata, ifmgd->auth_data->timeout); 6698 } else { 6699 ifmgd->auth_data->timeout = jiffies - 1; 6700 } 6701 ifmgd->auth_data->timeout_started = true; 6702 } else if (ifmgd->assoc_data && 6703 (ieee80211_is_assoc_req(fc) || 6704 ieee80211_is_reassoc_req(fc))) { 6705 if (status_acked) { 6706 ifmgd->assoc_data->timeout = 6707 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6708 run_again(sdata, ifmgd->assoc_data->timeout); 6709 } else { 6710 ifmgd->assoc_data->timeout = jiffies - 1; 6711 } 6712 ifmgd->assoc_data->timeout_started = true; 6713 } 6714 } 6715 6716 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6717 time_after(jiffies, ifmgd->auth_data->timeout)) { 6718 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6719 /* 6720 * ok ... we waited for assoc or continuation but 6721 * userspace didn't do it, so kill the auth data 6722 */ 6723 ieee80211_destroy_auth_data(sdata, false); 6724 } else if (ieee80211_auth(sdata)) { 6725 u8 ap_addr[ETH_ALEN]; 6726 struct ieee80211_event event = { 6727 .type = MLME_EVENT, 6728 .u.mlme.data = AUTH_EVENT, 6729 .u.mlme.status = MLME_TIMEOUT, 6730 }; 6731 6732 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6733 6734 ieee80211_destroy_auth_data(sdata, false); 6735 6736 cfg80211_auth_timeout(sdata->dev, ap_addr); 6737 drv_event_callback(sdata->local, sdata, &event); 6738 } 6739 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6740 run_again(sdata, ifmgd->auth_data->timeout); 6741 6742 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6743 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6744 if ((ifmgd->assoc_data->need_beacon && 6745 !sdata->deflink.u.mgd.have_beacon) || 6746 ieee80211_do_assoc(sdata)) { 6747 struct ieee80211_event event = { 6748 .type = MLME_EVENT, 6749 .u.mlme.data = ASSOC_EVENT, 6750 .u.mlme.status = MLME_TIMEOUT, 6751 }; 6752 6753 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6754 drv_event_callback(sdata->local, sdata, &event); 6755 } 6756 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6757 run_again(sdata, ifmgd->assoc_data->timeout); 6758 6759 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6760 ifmgd->associated) { 6761 u8 *bssid = sdata->deflink.u.mgd.bssid; 6762 int max_tries; 6763 6764 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6765 max_tries = max_nullfunc_tries; 6766 else 6767 max_tries = max_probe_tries; 6768 6769 /* ACK received for nullfunc probing frame */ 6770 if (!ifmgd->probe_send_count) 6771 ieee80211_reset_ap_probe(sdata); 6772 else if (ifmgd->nullfunc_failed) { 6773 if (ifmgd->probe_send_count < max_tries) { 6774 mlme_dbg(sdata, 6775 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6776 bssid, ifmgd->probe_send_count, 6777 max_tries); 6778 ieee80211_mgd_probe_ap_send(sdata); 6779 } else { 6780 mlme_dbg(sdata, 6781 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6782 bssid); 6783 ieee80211_sta_connection_lost(sdata, 6784 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6785 false); 6786 } 6787 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6788 run_again(sdata, ifmgd->probe_timeout); 6789 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6790 mlme_dbg(sdata, 6791 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6792 bssid, probe_wait_ms); 6793 ieee80211_sta_connection_lost(sdata, 6794 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6795 } else if (ifmgd->probe_send_count < max_tries) { 6796 mlme_dbg(sdata, 6797 "No probe response from AP %pM after %dms, try %d/%i\n", 6798 bssid, probe_wait_ms, 6799 ifmgd->probe_send_count, max_tries); 6800 ieee80211_mgd_probe_ap_send(sdata); 6801 } else { 6802 /* 6803 * We actually lost the connection ... or did we? 6804 * Let's make sure! 6805 */ 6806 mlme_dbg(sdata, 6807 "No probe response from AP %pM after %dms, disconnecting.\n", 6808 bssid, probe_wait_ms); 6809 6810 ieee80211_sta_connection_lost(sdata, 6811 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6812 } 6813 } 6814 } 6815 6816 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6817 { 6818 struct ieee80211_sub_if_data *sdata = 6819 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6820 6821 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6822 return; 6823 6824 if (sdata->vif.bss_conf.csa_active && 6825 !sdata->deflink.u.mgd.csa_waiting_bcn) 6826 return; 6827 6828 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6829 return; 6830 6831 sdata->u.mgd.connection_loss = false; 6832 wiphy_work_queue(sdata->local->hw.wiphy, 6833 &sdata->u.mgd.beacon_connection_loss_work); 6834 } 6835 6836 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6837 { 6838 struct ieee80211_sub_if_data *sdata = 6839 from_timer(sdata, t, u.mgd.conn_mon_timer); 6840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6841 struct ieee80211_local *local = sdata->local; 6842 struct sta_info *sta; 6843 unsigned long timeout; 6844 6845 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6846 return; 6847 6848 if (sdata->vif.bss_conf.csa_active && 6849 !sdata->deflink.u.mgd.csa_waiting_bcn) 6850 return; 6851 6852 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6853 if (!sta) 6854 return; 6855 6856 timeout = sta->deflink.status_stats.last_ack; 6857 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6858 timeout = sta->deflink.rx_stats.last_rx; 6859 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6860 6861 /* If timeout is after now, then update timer to fire at 6862 * the later date, but do not actually probe at this time. 6863 */ 6864 if (time_is_after_jiffies(timeout)) { 6865 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6866 return; 6867 } 6868 6869 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 6870 } 6871 6872 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 6873 struct wiphy_work *work) 6874 { 6875 struct ieee80211_sub_if_data *sdata = 6876 container_of(work, struct ieee80211_sub_if_data, 6877 u.mgd.monitor_work); 6878 6879 ieee80211_mgd_probe_ap(sdata, false); 6880 } 6881 6882 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6883 { 6884 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6885 __ieee80211_stop_poll(sdata); 6886 6887 /* let's probe the connection once */ 6888 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6889 wiphy_work_queue(sdata->local->hw.wiphy, 6890 &sdata->u.mgd.monitor_work); 6891 } 6892 } 6893 6894 #ifdef CONFIG_PM 6895 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6896 { 6897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6898 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6899 6900 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6901 6902 if (ifmgd->auth_data || ifmgd->assoc_data) { 6903 const u8 *ap_addr = ifmgd->auth_data ? 6904 ifmgd->auth_data->ap_addr : 6905 ifmgd->assoc_data->ap_addr; 6906 6907 /* 6908 * If we are trying to authenticate / associate while suspending, 6909 * cfg80211 won't know and won't actually abort those attempts, 6910 * thus we need to do that ourselves. 6911 */ 6912 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6913 IEEE80211_STYPE_DEAUTH, 6914 WLAN_REASON_DEAUTH_LEAVING, 6915 false, frame_buf); 6916 if (ifmgd->assoc_data) 6917 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6918 if (ifmgd->auth_data) 6919 ieee80211_destroy_auth_data(sdata, false); 6920 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6921 IEEE80211_DEAUTH_FRAME_LEN, 6922 false); 6923 } 6924 6925 /* This is a bit of a hack - we should find a better and more generic 6926 * solution to this. Normally when suspending, cfg80211 will in fact 6927 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6928 * auth (not so important) or assoc (this is the problem) process. 6929 * 6930 * As a consequence, it can happen that we are in the process of both 6931 * associating and suspending, and receive an association response 6932 * after cfg80211 has checked if it needs to disconnect, but before 6933 * we actually set the flag to drop incoming frames. This will then 6934 * cause the workqueue flush to process the association response in 6935 * the suspend, resulting in a successful association just before it 6936 * tries to remove the interface from the driver, which now though 6937 * has a channel context assigned ... this results in issues. 6938 * 6939 * To work around this (for now) simply deauth here again if we're 6940 * now connected. 6941 */ 6942 if (ifmgd->associated && !sdata->local->wowlan) { 6943 u8 bssid[ETH_ALEN]; 6944 struct cfg80211_deauth_request req = { 6945 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6946 .bssid = bssid, 6947 }; 6948 6949 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6950 ieee80211_mgd_deauth(sdata, &req); 6951 } 6952 } 6953 #endif 6954 6955 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6956 { 6957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6958 6959 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6960 6961 if (!ifmgd->associated) 6962 return; 6963 6964 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6965 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6966 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6967 ieee80211_sta_connection_lost(sdata, 6968 WLAN_REASON_UNSPECIFIED, 6969 true); 6970 return; 6971 } 6972 6973 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6974 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6975 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6976 ieee80211_sta_connection_lost(sdata, 6977 WLAN_REASON_UNSPECIFIED, 6978 true); 6979 return; 6980 } 6981 } 6982 6983 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 6984 struct wiphy_work *work) 6985 { 6986 struct ieee80211_link_data *link = 6987 container_of(work, struct ieee80211_link_data, 6988 u.mgd.request_smps_work); 6989 6990 __ieee80211_request_smps_mgd(link->sdata, link, 6991 link->u.mgd.driver_smps_mode); 6992 } 6993 6994 /* interface setup */ 6995 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6996 { 6997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6998 6999 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 7000 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 7001 ieee80211_beacon_connection_loss_work); 7002 wiphy_work_init(&ifmgd->csa_connection_drop_work, 7003 ieee80211_csa_connection_drop_work); 7004 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 7005 ieee80211_tdls_peer_del_work); 7006 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 7007 ieee80211_ml_reconf_work); 7008 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 7009 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 7010 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 7011 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 7012 ieee80211_sta_handle_tspec_ac_params_wk); 7013 wiphy_delayed_work_init(&ifmgd->ttlm_work, 7014 ieee80211_tid_to_link_map_work); 7015 7016 ifmgd->flags = 0; 7017 ifmgd->powersave = sdata->wdev.ps; 7018 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 7019 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 7020 /* Setup TDLS data */ 7021 spin_lock_init(&ifmgd->teardown_lock); 7022 ifmgd->teardown_skb = NULL; 7023 ifmgd->orig_teardown_skb = NULL; 7024 } 7025 7026 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 7027 struct wiphy_work *work) 7028 { 7029 struct ieee80211_link_data *link = 7030 container_of(work, struct ieee80211_link_data, 7031 u.mgd.recalc_smps); 7032 7033 ieee80211_recalc_smps(link->sdata, link); 7034 } 7035 7036 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 7037 { 7038 struct ieee80211_sub_if_data *sdata = link->sdata; 7039 struct ieee80211_local *local = sdata->local; 7040 unsigned int link_id = link->link_id; 7041 7042 link->u.mgd.p2p_noa_index = -1; 7043 link->u.mgd.conn_flags = 0; 7044 link->conf->bssid = link->u.mgd.bssid; 7045 7046 wiphy_work_init(&link->u.mgd.request_smps_work, 7047 ieee80211_request_smps_mgd_work); 7048 wiphy_work_init(&link->u.mgd.recalc_smps, 7049 ieee80211_recalc_smps_work); 7050 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 7051 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 7052 else 7053 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 7054 7055 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 7056 ieee80211_chswitch_work); 7057 7058 if (sdata->u.mgd.assoc_data) 7059 ether_addr_copy(link->conf->addr, 7060 sdata->u.mgd.assoc_data->link[link_id].addr); 7061 else if (!is_valid_ether_addr(link->conf->addr)) 7062 eth_random_addr(link->conf->addr); 7063 } 7064 7065 /* scan finished notification */ 7066 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 7067 { 7068 struct ieee80211_sub_if_data *sdata; 7069 7070 /* Restart STA timers */ 7071 rcu_read_lock(); 7072 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 7073 if (ieee80211_sdata_running(sdata)) 7074 ieee80211_restart_sta_timer(sdata); 7075 } 7076 rcu_read_unlock(); 7077 } 7078 7079 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 7080 struct cfg80211_bss *cbss, s8 link_id, 7081 const u8 *ap_mld_addr, bool assoc, 7082 bool override) 7083 { 7084 struct ieee80211_local *local = sdata->local; 7085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7086 struct ieee80211_bss *bss = (void *)cbss->priv; 7087 struct sta_info *new_sta = NULL; 7088 struct ieee80211_link_data *link; 7089 bool have_sta = false; 7090 bool mlo; 7091 int err; 7092 7093 if (link_id >= 0) { 7094 mlo = true; 7095 if (WARN_ON(!ap_mld_addr)) 7096 return -EINVAL; 7097 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 7098 } else { 7099 if (WARN_ON(ap_mld_addr)) 7100 return -EINVAL; 7101 ap_mld_addr = cbss->bssid; 7102 err = ieee80211_vif_set_links(sdata, 0, 0); 7103 link_id = 0; 7104 mlo = false; 7105 } 7106 7107 if (err) 7108 return err; 7109 7110 link = sdata_dereference(sdata->link[link_id], sdata); 7111 if (WARN_ON(!link)) { 7112 err = -ENOLINK; 7113 goto out_err; 7114 } 7115 7116 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 7117 err = -EINVAL; 7118 goto out_err; 7119 } 7120 7121 /* If a reconfig is happening, bail out */ 7122 if (local->in_reconfig) { 7123 err = -EBUSY; 7124 goto out_err; 7125 } 7126 7127 if (assoc) { 7128 rcu_read_lock(); 7129 have_sta = sta_info_get(sdata, ap_mld_addr); 7130 rcu_read_unlock(); 7131 } 7132 7133 if (!have_sta) { 7134 if (mlo) 7135 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 7136 link_id, cbss->bssid, 7137 GFP_KERNEL); 7138 else 7139 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 7140 7141 if (!new_sta) { 7142 err = -ENOMEM; 7143 goto out_err; 7144 } 7145 7146 new_sta->sta.mlo = mlo; 7147 } 7148 7149 /* 7150 * Set up the information for the new channel before setting the 7151 * new channel. We can't - completely race-free - change the basic 7152 * rates bitmap and the channel (sband) that it refers to, but if 7153 * we set it up before we at least avoid calling into the driver's 7154 * bss_info_changed() method with invalid information (since we do 7155 * call that from changing the channel - only for IDLE and perhaps 7156 * some others, but ...). 7157 * 7158 * So to avoid that, just set up all the new information before the 7159 * channel, but tell the driver to apply it only afterwards, since 7160 * it might need the new channel for that. 7161 */ 7162 if (new_sta) { 7163 const struct cfg80211_bss_ies *ies; 7164 struct link_sta_info *link_sta; 7165 7166 rcu_read_lock(); 7167 link_sta = rcu_dereference(new_sta->link[link_id]); 7168 if (WARN_ON(!link_sta)) { 7169 rcu_read_unlock(); 7170 sta_info_free(local, new_sta); 7171 err = -EINVAL; 7172 goto out_err; 7173 } 7174 7175 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7176 link_sta, cbss); 7177 if (err) { 7178 rcu_read_unlock(); 7179 sta_info_free(local, new_sta); 7180 goto out_err; 7181 } 7182 7183 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7184 7185 /* set timing information */ 7186 link->conf->beacon_int = cbss->beacon_interval; 7187 ies = rcu_dereference(cbss->beacon_ies); 7188 if (ies) { 7189 link->conf->sync_tsf = ies->tsf; 7190 link->conf->sync_device_ts = 7191 bss->device_ts_beacon; 7192 7193 ieee80211_get_dtim(ies, 7194 &link->conf->sync_dtim_count, 7195 NULL); 7196 } else if (!ieee80211_hw_check(&sdata->local->hw, 7197 TIMING_BEACON_ONLY)) { 7198 ies = rcu_dereference(cbss->proberesp_ies); 7199 /* must be non-NULL since beacon IEs were NULL */ 7200 link->conf->sync_tsf = ies->tsf; 7201 link->conf->sync_device_ts = 7202 bss->device_ts_presp; 7203 link->conf->sync_dtim_count = 0; 7204 } else { 7205 link->conf->sync_tsf = 0; 7206 link->conf->sync_device_ts = 0; 7207 link->conf->sync_dtim_count = 0; 7208 } 7209 rcu_read_unlock(); 7210 } 7211 7212 if (new_sta || override) { 7213 err = ieee80211_prep_channel(sdata, link, cbss, mlo, 7214 &link->u.mgd.conn_flags); 7215 if (err) { 7216 if (new_sta) 7217 sta_info_free(local, new_sta); 7218 goto out_err; 7219 } 7220 } 7221 7222 if (new_sta) { 7223 /* 7224 * tell driver about BSSID, basic rates and timing 7225 * this was set up above, before setting the channel 7226 */ 7227 ieee80211_link_info_change_notify(sdata, link, 7228 BSS_CHANGED_BSSID | 7229 BSS_CHANGED_BASIC_RATES | 7230 BSS_CHANGED_BEACON_INT); 7231 7232 if (assoc) 7233 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7234 7235 err = sta_info_insert(new_sta); 7236 new_sta = NULL; 7237 if (err) { 7238 sdata_info(sdata, 7239 "failed to insert STA entry for the AP (error %d)\n", 7240 err); 7241 goto out_err; 7242 } 7243 } else 7244 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7245 7246 /* Cancel scan to ensure that nothing interferes with connection */ 7247 if (local->scanning) 7248 ieee80211_scan_cancel(local); 7249 7250 return 0; 7251 7252 out_err: 7253 ieee80211_link_release_channel(&sdata->deflink); 7254 ieee80211_vif_set_links(sdata, 0, 0); 7255 return err; 7256 } 7257 7258 /* config hooks */ 7259 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 7260 struct cfg80211_auth_request *req) 7261 { 7262 struct ieee80211_local *local = sdata->local; 7263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7264 struct ieee80211_mgd_auth_data *auth_data; 7265 struct ieee80211_link_data *link; 7266 const struct element *csa_elem, *ecsa_elem; 7267 u16 auth_alg; 7268 int err; 7269 bool cont_auth; 7270 7271 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7272 7273 /* prepare auth data structure */ 7274 7275 switch (req->auth_type) { 7276 case NL80211_AUTHTYPE_OPEN_SYSTEM: 7277 auth_alg = WLAN_AUTH_OPEN; 7278 break; 7279 case NL80211_AUTHTYPE_SHARED_KEY: 7280 if (fips_enabled) 7281 return -EOPNOTSUPP; 7282 auth_alg = WLAN_AUTH_SHARED_KEY; 7283 break; 7284 case NL80211_AUTHTYPE_FT: 7285 auth_alg = WLAN_AUTH_FT; 7286 break; 7287 case NL80211_AUTHTYPE_NETWORK_EAP: 7288 auth_alg = WLAN_AUTH_LEAP; 7289 break; 7290 case NL80211_AUTHTYPE_SAE: 7291 auth_alg = WLAN_AUTH_SAE; 7292 break; 7293 case NL80211_AUTHTYPE_FILS_SK: 7294 auth_alg = WLAN_AUTH_FILS_SK; 7295 break; 7296 case NL80211_AUTHTYPE_FILS_SK_PFS: 7297 auth_alg = WLAN_AUTH_FILS_SK_PFS; 7298 break; 7299 case NL80211_AUTHTYPE_FILS_PK: 7300 auth_alg = WLAN_AUTH_FILS_PK; 7301 break; 7302 default: 7303 return -EOPNOTSUPP; 7304 } 7305 7306 if (ifmgd->assoc_data) 7307 return -EBUSY; 7308 7309 rcu_read_lock(); 7310 csa_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_CHANNEL_SWITCH); 7311 ecsa_elem = ieee80211_bss_get_elem(req->bss, 7312 WLAN_EID_EXT_CHANSWITCH_ANN); 7313 if ((csa_elem && 7314 csa_elem->datalen == sizeof(struct ieee80211_channel_sw_ie) && 7315 ((struct ieee80211_channel_sw_ie *)csa_elem->data)->count != 0) || 7316 (ecsa_elem && 7317 ecsa_elem->datalen == sizeof(struct ieee80211_ext_chansw_ie) && 7318 ((struct ieee80211_ext_chansw_ie *)ecsa_elem->data)->count != 0)) { 7319 rcu_read_unlock(); 7320 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 7321 return -EINVAL; 7322 } 7323 rcu_read_unlock(); 7324 7325 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 7326 req->ie_len, GFP_KERNEL); 7327 if (!auth_data) 7328 return -ENOMEM; 7329 7330 memcpy(auth_data->ap_addr, 7331 req->ap_mld_addr ?: req->bss->bssid, 7332 ETH_ALEN); 7333 auth_data->bss = req->bss; 7334 auth_data->link_id = req->link_id; 7335 7336 if (req->auth_data_len >= 4) { 7337 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 7338 __le16 *pos = (__le16 *) req->auth_data; 7339 7340 auth_data->sae_trans = le16_to_cpu(pos[0]); 7341 auth_data->sae_status = le16_to_cpu(pos[1]); 7342 } 7343 memcpy(auth_data->data, req->auth_data + 4, 7344 req->auth_data_len - 4); 7345 auth_data->data_len += req->auth_data_len - 4; 7346 } 7347 7348 /* Check if continuing authentication or trying to authenticate with the 7349 * same BSS that we were in the process of authenticating with and avoid 7350 * removal and re-addition of the STA entry in 7351 * ieee80211_prep_connection(). 7352 */ 7353 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 7354 ifmgd->auth_data->link_id == req->link_id; 7355 7356 if (req->ie && req->ie_len) { 7357 memcpy(&auth_data->data[auth_data->data_len], 7358 req->ie, req->ie_len); 7359 auth_data->data_len += req->ie_len; 7360 } 7361 7362 if (req->key && req->key_len) { 7363 auth_data->key_len = req->key_len; 7364 auth_data->key_idx = req->key_idx; 7365 memcpy(auth_data->key, req->key, req->key_len); 7366 } 7367 7368 auth_data->algorithm = auth_alg; 7369 7370 /* try to authenticate/probe */ 7371 7372 if (ifmgd->auth_data) { 7373 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 7374 auth_data->peer_confirmed = 7375 ifmgd->auth_data->peer_confirmed; 7376 } 7377 ieee80211_destroy_auth_data(sdata, cont_auth); 7378 } 7379 7380 /* prep auth_data so we don't go into idle on disassoc */ 7381 ifmgd->auth_data = auth_data; 7382 7383 /* If this is continuation of an ongoing SAE authentication exchange 7384 * (i.e., request to send SAE Confirm) and the peer has already 7385 * confirmed, mark authentication completed since we are about to send 7386 * out SAE Confirm. 7387 */ 7388 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 7389 auth_data->peer_confirmed && auth_data->sae_trans == 2) 7390 ieee80211_mark_sta_auth(sdata); 7391 7392 if (ifmgd->associated) { 7393 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7394 7395 sdata_info(sdata, 7396 "disconnect from AP %pM for new auth to %pM\n", 7397 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 7398 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7399 WLAN_REASON_UNSPECIFIED, 7400 false, frame_buf); 7401 7402 ieee80211_report_disconnect(sdata, frame_buf, 7403 sizeof(frame_buf), true, 7404 WLAN_REASON_UNSPECIFIED, 7405 false); 7406 } 7407 7408 /* needed for transmitting the auth frame(s) properly */ 7409 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 7410 7411 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 7412 req->ap_mld_addr, cont_auth, false); 7413 if (err) 7414 goto err_clear; 7415 7416 if (req->link_id > 0) 7417 link = sdata_dereference(sdata->link[req->link_id], sdata); 7418 else 7419 link = sdata_dereference(sdata->link[0], sdata); 7420 7421 if (WARN_ON(!link)) { 7422 err = -ENOLINK; 7423 goto err_clear; 7424 } 7425 7426 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 7427 auth_data->ap_addr, link->conf->addr); 7428 7429 err = ieee80211_auth(sdata); 7430 if (err) { 7431 sta_info_destroy_addr(sdata, auth_data->ap_addr); 7432 goto err_clear; 7433 } 7434 7435 /* hold our own reference */ 7436 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 7437 return 0; 7438 7439 err_clear: 7440 if (!ieee80211_vif_is_mld(&sdata->vif)) { 7441 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7442 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7443 BSS_CHANGED_BSSID); 7444 ieee80211_link_release_channel(&sdata->deflink); 7445 } 7446 ifmgd->auth_data = NULL; 7447 kfree(auth_data); 7448 return err; 7449 } 7450 7451 static ieee80211_conn_flags_t 7452 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 7453 struct ieee80211_mgd_assoc_data *assoc_data, 7454 struct cfg80211_assoc_request *req, 7455 ieee80211_conn_flags_t conn_flags, 7456 unsigned int link_id) 7457 { 7458 struct ieee80211_local *local = sdata->local; 7459 const struct cfg80211_bss_ies *bss_ies; 7460 struct ieee80211_supported_band *sband; 7461 const struct element *ht_elem, *vht_elem; 7462 struct ieee80211_link_data *link; 7463 struct cfg80211_bss *cbss; 7464 struct ieee80211_bss *bss; 7465 bool is_5ghz, is_6ghz; 7466 7467 cbss = assoc_data->link[link_id].bss; 7468 if (WARN_ON(!cbss)) 7469 return 0; 7470 7471 bss = (void *)cbss->priv; 7472 7473 sband = local->hw.wiphy->bands[cbss->channel->band]; 7474 if (WARN_ON(!sband)) 7475 return 0; 7476 7477 link = sdata_dereference(sdata->link[link_id], sdata); 7478 if (WARN_ON(!link)) 7479 return 0; 7480 7481 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 7482 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 7483 7484 /* for MLO connections assume advertising all rates is OK */ 7485 if (!req->ap_mld_addr) { 7486 assoc_data->supp_rates = bss->supp_rates; 7487 assoc_data->supp_rates_len = bss->supp_rates_len; 7488 } 7489 7490 /* copy and link elems for the STA profile */ 7491 if (req->links[link_id].elems_len) { 7492 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7493 req->links[link_id].elems_len); 7494 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7495 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7496 assoc_data->ie_pos += req->links[link_id].elems_len; 7497 } 7498 7499 rcu_read_lock(); 7500 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7501 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7502 assoc_data->link[link_id].ap_ht_param = 7503 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7504 else if (!is_6ghz) 7505 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7506 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7507 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7508 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7509 sizeof(struct ieee80211_vht_cap)); 7510 } else if (is_5ghz) { 7511 link_info(link, 7512 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7513 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7514 IEEE80211_CONN_DISABLE_HE | 7515 IEEE80211_CONN_DISABLE_EHT; 7516 } 7517 rcu_read_unlock(); 7518 7519 link->u.mgd.beacon_crc_valid = false; 7520 link->u.mgd.dtim_period = 0; 7521 link->u.mgd.have_beacon = false; 7522 7523 /* override HT/VHT configuration only if the AP and we support it */ 7524 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7525 struct ieee80211_sta_ht_cap sta_ht_cap; 7526 7527 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7528 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7529 } 7530 7531 link->conf->eht_puncturing = 0; 7532 7533 rcu_read_lock(); 7534 bss_ies = rcu_dereference(cbss->beacon_ies); 7535 if (bss_ies) { 7536 u8 dtim_count = 0; 7537 7538 ieee80211_get_dtim(bss_ies, &dtim_count, 7539 &link->u.mgd.dtim_period); 7540 7541 sdata->deflink.u.mgd.have_beacon = true; 7542 7543 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7544 link->conf->sync_tsf = bss_ies->tsf; 7545 link->conf->sync_device_ts = bss->device_ts_beacon; 7546 link->conf->sync_dtim_count = dtim_count; 7547 } 7548 } else { 7549 bss_ies = rcu_dereference(cbss->ies); 7550 } 7551 7552 if (bss_ies) { 7553 const struct ieee80211_eht_operation *eht_oper; 7554 const struct element *elem; 7555 7556 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7557 bss_ies->data, bss_ies->len); 7558 if (elem && elem->datalen >= 3) 7559 link->conf->profile_periodicity = elem->data[2]; 7560 else 7561 link->conf->profile_periodicity = 0; 7562 7563 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7564 bss_ies->data, bss_ies->len); 7565 if (elem && elem->datalen >= 11 && 7566 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7567 link->conf->ema_ap = true; 7568 else 7569 link->conf->ema_ap = false; 7570 7571 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7572 bss_ies->data, bss_ies->len); 7573 eht_oper = (const void *)(elem->data + 1); 7574 7575 if (elem && 7576 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7577 elem->datalen - 1) && 7578 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7579 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7580 const struct ieee80211_eht_operation_info *info = 7581 (void *)eht_oper->optional; 7582 const u8 *disable_subchannel_bitmap = info->optional; 7583 u16 bitmap; 7584 7585 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7586 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7587 &link->conf->chandef)) 7588 ieee80211_handle_puncturing_bitmap(link, 7589 eht_oper, 7590 bitmap, 7591 NULL); 7592 else 7593 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7594 } 7595 } 7596 rcu_read_unlock(); 7597 7598 if (bss->corrupt_data) { 7599 char *corrupt_type = "data"; 7600 7601 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7602 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7603 corrupt_type = "beacon and probe response"; 7604 else 7605 corrupt_type = "beacon"; 7606 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7607 corrupt_type = "probe response"; 7608 } 7609 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7610 cbss->bssid, corrupt_type); 7611 } 7612 7613 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7614 if (sdata->u.mgd.powersave) 7615 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7616 else 7617 link->smps_mode = IEEE80211_SMPS_OFF; 7618 } else { 7619 link->smps_mode = link->u.mgd.req_smps; 7620 } 7621 7622 return conn_flags; 7623 } 7624 7625 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7626 struct cfg80211_assoc_request *req) 7627 { 7628 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7629 struct ieee80211_local *local = sdata->local; 7630 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7631 struct ieee80211_mgd_assoc_data *assoc_data; 7632 const struct element *ssid_elem, *csa_elem, *ecsa_elem; 7633 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7634 ieee80211_conn_flags_t conn_flags = 0; 7635 struct ieee80211_link_data *link; 7636 struct cfg80211_bss *cbss; 7637 struct ieee80211_bss *bss; 7638 bool override; 7639 int i, err; 7640 size_t size = sizeof(*assoc_data) + req->ie_len; 7641 7642 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7643 size += req->links[i].elems_len; 7644 7645 /* FIXME: no support for 4-addr MLO yet */ 7646 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7647 return -EOPNOTSUPP; 7648 7649 assoc_data = kzalloc(size, GFP_KERNEL); 7650 if (!assoc_data) 7651 return -ENOMEM; 7652 7653 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7654 7655 rcu_read_lock(); 7656 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7657 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7658 rcu_read_unlock(); 7659 kfree(assoc_data); 7660 return -EINVAL; 7661 } 7662 7663 csa_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_CHANNEL_SWITCH); 7664 ecsa_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_EXT_CHANSWITCH_ANN); 7665 if ((csa_elem && 7666 csa_elem->datalen == sizeof(struct ieee80211_channel_sw_ie) && 7667 ((struct ieee80211_channel_sw_ie *)csa_elem->data)->count != 0) || 7668 (ecsa_elem && 7669 ecsa_elem->datalen == sizeof(struct ieee80211_ext_chansw_ie) && 7670 ((struct ieee80211_ext_chansw_ie *)ecsa_elem->data)->count != 0)) { 7671 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 7672 rcu_read_unlock(); 7673 kfree(assoc_data); 7674 return -EINVAL; 7675 } 7676 7677 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7678 assoc_data->ssid_len = ssid_elem->datalen; 7679 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7680 vif_cfg->ssid_len = assoc_data->ssid_len; 7681 rcu_read_unlock(); 7682 7683 if (req->ap_mld_addr) { 7684 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7685 if (!req->links[i].bss) 7686 continue; 7687 link = sdata_dereference(sdata->link[i], sdata); 7688 if (link) 7689 ether_addr_copy(assoc_data->link[i].addr, 7690 link->conf->addr); 7691 else 7692 eth_random_addr(assoc_data->link[i].addr); 7693 } 7694 } else { 7695 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7696 } 7697 7698 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7699 7700 memcpy(assoc_data->ap_addr, 7701 req->ap_mld_addr ?: req->bss->bssid, 7702 ETH_ALEN); 7703 7704 if (ifmgd->associated) { 7705 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7706 7707 sdata_info(sdata, 7708 "disconnect from AP %pM for new assoc to %pM\n", 7709 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7710 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7711 WLAN_REASON_UNSPECIFIED, 7712 false, frame_buf); 7713 7714 ieee80211_report_disconnect(sdata, frame_buf, 7715 sizeof(frame_buf), true, 7716 WLAN_REASON_UNSPECIFIED, 7717 false); 7718 } 7719 7720 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7721 err = -EBUSY; 7722 goto err_free; 7723 } 7724 7725 if (ifmgd->assoc_data) { 7726 err = -EBUSY; 7727 goto err_free; 7728 } 7729 7730 if (ifmgd->auth_data) { 7731 bool match; 7732 7733 /* keep sta info, bssid if matching */ 7734 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7735 assoc_data->ap_addr) && 7736 ifmgd->auth_data->link_id == req->link_id; 7737 7738 /* Cleanup is delayed if auth_data matches */ 7739 if (!match) 7740 ieee80211_destroy_auth_data(sdata, false); 7741 } 7742 7743 /* prepare assoc data */ 7744 7745 bss = (void *)cbss->priv; 7746 assoc_data->wmm = bss->wmm_used && 7747 (local->hw.queues >= IEEE80211_NUM_ACS); 7748 7749 /* 7750 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7751 * We still associate in non-HT mode (11a/b/g) if any one of these 7752 * ciphers is configured as pairwise. 7753 * We can set this to true for non-11n hardware, that'll be checked 7754 * separately along with the peer capabilities. 7755 */ 7756 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7757 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7758 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7759 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7760 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7761 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7762 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7763 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7764 netdev_info(sdata->dev, 7765 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7766 } 7767 } 7768 7769 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7770 if (!bss->wmm_used) { 7771 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7772 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7773 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7774 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7775 netdev_info(sdata->dev, 7776 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7777 } 7778 7779 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7780 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7781 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7782 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7783 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7784 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7785 } 7786 7787 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7788 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7789 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7790 } 7791 7792 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7793 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7794 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7795 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7796 } 7797 7798 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7799 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7800 7801 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7802 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7803 sizeof(ifmgd->ht_capa_mask)); 7804 7805 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7806 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7807 sizeof(ifmgd->vht_capa_mask)); 7808 7809 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7810 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7811 sizeof(ifmgd->s1g_capa_mask)); 7812 7813 if (req->ie && req->ie_len) { 7814 memcpy(assoc_data->ie, req->ie, req->ie_len); 7815 assoc_data->ie_len = req->ie_len; 7816 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7817 } else { 7818 assoc_data->ie_pos = assoc_data->ie; 7819 } 7820 7821 if (req->fils_kek) { 7822 /* should already be checked in cfg80211 - so warn */ 7823 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7824 err = -EINVAL; 7825 goto err_free; 7826 } 7827 memcpy(assoc_data->fils_kek, req->fils_kek, 7828 req->fils_kek_len); 7829 assoc_data->fils_kek_len = req->fils_kek_len; 7830 } 7831 7832 if (req->fils_nonces) 7833 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7834 2 * FILS_NONCE_LEN); 7835 7836 /* default timeout */ 7837 assoc_data->timeout = jiffies; 7838 assoc_data->timeout_started = true; 7839 7840 assoc_data->assoc_link_id = assoc_link_id; 7841 7842 if (req->ap_mld_addr) { 7843 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7844 assoc_data->link[i].conn_flags = conn_flags; 7845 assoc_data->link[i].bss = req->links[i].bss; 7846 assoc_data->link[i].disabled = req->links[i].disabled; 7847 } 7848 7849 /* if there was no authentication, set up the link */ 7850 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 7851 if (err) 7852 goto err_clear; 7853 } else { 7854 assoc_data->link[0].conn_flags = conn_flags; 7855 assoc_data->link[0].bss = cbss; 7856 } 7857 7858 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7859 if (WARN_ON(!link)) { 7860 err = -EINVAL; 7861 goto err_clear; 7862 } 7863 7864 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7865 conn_flags |= link->u.mgd.conn_flags; 7866 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7867 conn_flags, assoc_link_id); 7868 override = link->u.mgd.conn_flags != conn_flags; 7869 link->u.mgd.conn_flags |= conn_flags; 7870 7871 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7872 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7873 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7874 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7875 7876 if (bss->wmm_used && bss->uapsd_supported && 7877 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7878 assoc_data->uapsd = true; 7879 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7880 } else { 7881 assoc_data->uapsd = false; 7882 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7883 } 7884 7885 if (req->prev_bssid) 7886 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7887 7888 if (req->use_mfp) { 7889 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7890 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7891 } else { 7892 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7893 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7894 } 7895 7896 if (req->flags & ASSOC_REQ_USE_RRM) 7897 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7898 else 7899 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7900 7901 if (req->crypto.control_port) 7902 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7903 else 7904 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7905 7906 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7907 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7908 sdata->control_port_over_nl80211 = 7909 req->crypto.control_port_over_nl80211; 7910 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7911 7912 /* kick off associate process */ 7913 ifmgd->assoc_data = assoc_data; 7914 7915 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7916 if (!assoc_data->link[i].bss) 7917 continue; 7918 if (i == assoc_data->assoc_link_id) 7919 continue; 7920 /* only calculate the flags, hence link == NULL */ 7921 err = ieee80211_prep_channel(sdata, NULL, 7922 assoc_data->link[i].bss, true, 7923 &assoc_data->link[i].conn_flags); 7924 if (err) { 7925 req->links[i].error = err; 7926 goto err_clear; 7927 } 7928 } 7929 7930 /* needed for transmitting the assoc frames properly */ 7931 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7932 7933 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7934 req->ap_mld_addr, true, override); 7935 if (err) 7936 goto err_clear; 7937 7938 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7939 link->u.mgd.conn_flags; 7940 7941 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7942 const struct cfg80211_bss_ies *beacon_ies; 7943 7944 rcu_read_lock(); 7945 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7946 7947 if (beacon_ies) { 7948 /* 7949 * Wait up to one beacon interval ... 7950 * should this be more if we miss one? 7951 */ 7952 sdata_info(sdata, "waiting for beacon from %pM\n", 7953 link->u.mgd.bssid); 7954 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7955 assoc_data->timeout_started = true; 7956 assoc_data->need_beacon = true; 7957 } 7958 rcu_read_unlock(); 7959 } 7960 7961 run_again(sdata, assoc_data->timeout); 7962 7963 /* We are associating, clean up auth_data */ 7964 if (ifmgd->auth_data) 7965 ieee80211_destroy_auth_data(sdata, true); 7966 7967 return 0; 7968 err_clear: 7969 if (!ifmgd->auth_data) { 7970 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7971 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7972 BSS_CHANGED_BSSID); 7973 } 7974 ifmgd->assoc_data = NULL; 7975 err_free: 7976 kfree(assoc_data); 7977 return err; 7978 } 7979 7980 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7981 struct cfg80211_deauth_request *req) 7982 { 7983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7984 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7985 bool tx = !req->local_state_change; 7986 struct ieee80211_prep_tx_info info = { 7987 .subtype = IEEE80211_STYPE_DEAUTH, 7988 }; 7989 7990 if (ifmgd->auth_data && 7991 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7992 sdata_info(sdata, 7993 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7994 req->bssid, req->reason_code, 7995 ieee80211_get_reason_code_string(req->reason_code)); 7996 7997 info.link_id = ifmgd->auth_data->link_id; 7998 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7999 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8000 IEEE80211_STYPE_DEAUTH, 8001 req->reason_code, tx, 8002 frame_buf); 8003 ieee80211_destroy_auth_data(sdata, false); 8004 ieee80211_report_disconnect(sdata, frame_buf, 8005 sizeof(frame_buf), true, 8006 req->reason_code, false); 8007 drv_mgd_complete_tx(sdata->local, sdata, &info); 8008 return 0; 8009 } 8010 8011 if (ifmgd->assoc_data && 8012 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 8013 sdata_info(sdata, 8014 "aborting association with %pM by local choice (Reason: %u=%s)\n", 8015 req->bssid, req->reason_code, 8016 ieee80211_get_reason_code_string(req->reason_code)); 8017 8018 info.link_id = ifmgd->assoc_data->assoc_link_id; 8019 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8020 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8021 IEEE80211_STYPE_DEAUTH, 8022 req->reason_code, tx, 8023 frame_buf); 8024 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8025 ieee80211_report_disconnect(sdata, frame_buf, 8026 sizeof(frame_buf), true, 8027 req->reason_code, false); 8028 return 0; 8029 } 8030 8031 if (ifmgd->associated && 8032 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 8033 sdata_info(sdata, 8034 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 8035 req->bssid, req->reason_code, 8036 ieee80211_get_reason_code_string(req->reason_code)); 8037 8038 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8039 req->reason_code, tx, frame_buf); 8040 ieee80211_report_disconnect(sdata, frame_buf, 8041 sizeof(frame_buf), true, 8042 req->reason_code, false); 8043 drv_mgd_complete_tx(sdata->local, sdata, &info); 8044 return 0; 8045 } 8046 8047 return -ENOTCONN; 8048 } 8049 8050 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 8051 struct cfg80211_disassoc_request *req) 8052 { 8053 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8054 8055 if (!sdata->u.mgd.associated || 8056 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 8057 return -ENOTCONN; 8058 8059 sdata_info(sdata, 8060 "disassociating from %pM by local choice (Reason: %u=%s)\n", 8061 req->ap_addr, req->reason_code, 8062 ieee80211_get_reason_code_string(req->reason_code)); 8063 8064 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 8065 req->reason_code, !req->local_state_change, 8066 frame_buf); 8067 8068 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8069 req->reason_code, false); 8070 8071 return 0; 8072 } 8073 8074 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 8075 { 8076 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8077 &link->u.mgd.request_smps_work); 8078 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8079 &link->u.mgd.recalc_smps); 8080 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 8081 &link->u.mgd.chswitch_work); 8082 } 8083 8084 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 8085 { 8086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8087 8088 /* 8089 * Make sure some work items will not run after this, 8090 * they will not do anything but might not have been 8091 * cancelled when disconnecting. 8092 */ 8093 wiphy_work_cancel(sdata->local->hw.wiphy, 8094 &ifmgd->monitor_work); 8095 wiphy_work_cancel(sdata->local->hw.wiphy, 8096 &ifmgd->beacon_connection_loss_work); 8097 wiphy_work_cancel(sdata->local->hw.wiphy, 8098 &ifmgd->csa_connection_drop_work); 8099 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8100 &ifmgd->tdls_peer_del_work); 8101 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8102 &ifmgd->ml_reconf_work); 8103 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 8104 8105 if (ifmgd->assoc_data) 8106 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8107 if (ifmgd->auth_data) 8108 ieee80211_destroy_auth_data(sdata, false); 8109 spin_lock_bh(&ifmgd->teardown_lock); 8110 if (ifmgd->teardown_skb) { 8111 kfree_skb(ifmgd->teardown_skb); 8112 ifmgd->teardown_skb = NULL; 8113 ifmgd->orig_teardown_skb = NULL; 8114 } 8115 kfree(ifmgd->assoc_req_ies); 8116 ifmgd->assoc_req_ies = NULL; 8117 ifmgd->assoc_req_ies_len = 0; 8118 spin_unlock_bh(&ifmgd->teardown_lock); 8119 del_timer_sync(&ifmgd->timer); 8120 } 8121 8122 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 8123 enum nl80211_cqm_rssi_threshold_event rssi_event, 8124 s32 rssi_level, 8125 gfp_t gfp) 8126 { 8127 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8128 8129 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 8130 8131 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 8132 } 8133 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 8134 8135 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 8136 { 8137 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8138 8139 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 8140 8141 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 8142 } 8143 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 8144 8145 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 8146 int rssi_min_thold, 8147 int rssi_max_thold) 8148 { 8149 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 8150 8151 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 8152 return; 8153 8154 /* 8155 * Scale up threshold values before storing it, as the RSSI averaging 8156 * algorithm uses a scaled up value as well. Change this scaling 8157 * factor if the RSSI averaging algorithm changes. 8158 */ 8159 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 8160 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 8161 } 8162 8163 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 8164 int rssi_min_thold, 8165 int rssi_max_thold) 8166 { 8167 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8168 8169 WARN_ON(rssi_min_thold == rssi_max_thold || 8170 rssi_min_thold > rssi_max_thold); 8171 8172 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 8173 rssi_max_thold); 8174 } 8175 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 8176 8177 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 8178 { 8179 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8180 8181 _ieee80211_enable_rssi_reports(sdata, 0, 0); 8182 } 8183 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 8184